commit 31d85224701d45af4ae26007af7bc249cf4213af
Author: Luke Esau <lukesau@gmail.com>
Date:   Tue Nov 3 18:30:14 2020 -0800

    first commit

diff --git a/__pycache__/basegame.cpython-38.pyc b/__pycache__/basegame.cpython-38.pyc
new file mode 100644
index 0000000..5c4c81f
Binary files /dev/null and b/__pycache__/basegame.cpython-38.pyc differ
diff --git a/api.py b/api.py
new file mode 100644
index 0000000..d91b9d5
--- /dev/null
+++ b/api.py
@@ -0,0 +1,12 @@
+import flask
+
+app = flask.Flask(__name__)
+app.config["DEBUG"] = True
+
+
+@app.route('/', methods=['GET'])
+def home():
+    return "<h1>Distant Reading Archive</h1><p>This site is a prototype API for distant reading of science fiction novels.</p>"
+
+app.run(host="0.0.0.0", port=5000, debug=True)
+
diff --git a/basegame.py b/basegame.py
new file mode 100644
index 0000000..dd33fa5
--- /dev/null
+++ b/basegame.py
@@ -0,0 +1,336 @@
+import mysql.connector
+import json
+import random
+
+class Card:
+    isVisible = False
+    isAccessible = False
+
+class Player:
+    def __init__(self):
+        self.name = "Player"
+        self.ownedCitizens = []
+        self.ownedDomains = []
+        self.dukes = []
+        self.ownedMonsters = []
+        self.goldScore = 2
+        self.strengthScore = 0
+        self.magicScore = 1
+        self.isFirst = False
+        self.shadowCount = 0
+        self.holyCount = 0
+        self.soldierCount = 0
+        self.workerCount = 0
+    def display(self):
+        print(self.name)
+        print("Gold: {} Strength: {} Magic: {}".format(self.goldScore, self.strengthScore, self.magicScore))
+        print("Citizens: {} Monsters: {} Domains: {}".format(len(self.ownedCitizens), len(self.ownedMonsters), len(self.ownedDomains)))
+        if self.shadowCount != 0:
+            tempChar = ''
+            if self.shadowCount > 1:
+                tempChar = 's'
+            print("{} Shadow icon{}".format(self.shadowCount, tempChar))
+        if self.holyCount != 0:
+            tempChar = ''
+            if self.holyCount > 1:
+                tempChar = 's'
+            print("{} Holy icon{}".format(self.holyCount, tempChar))
+        if self.soldierCount != 0:
+            tempChar = ''
+            if self.soldierCount > 1:
+                tempChar = 's'
+            print("{} Soldier icon{}".format(self.soldierCount, tempChar))
+        if self.workerCount != 0:
+            tempChar = ''
+            if self.workerCount > 1:
+                tempChar = 's'
+            print("{} Worker icon{}".format(self.workerCount, tempChar))
+    def calc_roles(self):
+        for citizen in self.ownedCitizens:
+            self.shadowCount = self.shadowCount + citizen.shadowCount
+            self.holyCount = self.holyCount + citizen.holyCount
+            self.soldierCount = self.soldierCount + citizen.soldierCount
+            self.workerCount = self.workerCount + citizen.workerCount
+        for domain in self.ownedDomains:
+            self.shadowCount = self.shadowCount + domain.shadowCount
+            self.holyCount = self.holyCount + domain.holyCount
+            self.soldierCount = self.soldierCount + domain.soldierCount
+            self.workerCount = self.workerCount + domain.workerCount
+
+class Starter(Card):
+    rollActivation = 0
+
+class Citizen(Card):
+    def __init__(self, input_name, gold_cost, roll_match1, roll_match2, shadow_count, holy_count, soldier_count, worker_count, gold_payout_on_turn, gold_payout_off_turn, strength_payout_on_turn, strength_payout_off_turn, magic_payout_on_turn, magic_payout_off_turn, has_special_payout_on_turn, has_special_payout_off_turn, special_payout_on_turn, special_payout_off_turn, special_citizen):
+        self.name = input_name
+        self.goldCost = gold_cost
+        self.rollMatch1 = roll_match1
+        self.rollMatch2 = roll_match2
+        self.shadowCount = shadow_count
+        self.holyCount = holy_count
+        self.soldierCount = soldier_count
+        self.workerCount = worker_count
+        self.goldPayoutOnTurn = gold_payout_on_turn
+        self.goldPayoutOffTurn = gold_payout_off_turn
+        self.strengthPayoutOnTurn = strength_payout_on_turn
+        self.strengthPayoutOffTurn = strength_payout_off_turn
+        self.magicPayoutOnTurn = magic_payout_on_turn
+        self.magicPayoutOffTurn = magic_payout_off_turn
+        self.hasSpecialPayoutOnTurn = has_special_payout_on_turn
+        self.hasSpecialPayoutOffTurn = has_special_payout_off_turn
+        self.specialPayoutOnTurn = special_payout_on_turn
+        self.specialPayoutOffTurn = special_payout_off_turn
+        self.specialCitizen = special_citizen
+    def display(self):
+        print("\n%s" % self.name)
+        print("Cost: {} Gold".format(self.goldCost))
+        if self.shadowCount != 0:
+            tempChar = ''
+            if self.shadowCount > 1:
+                tempChar = 's'
+            print("{} Shadow icon{}".format(self.shadowCount, tempChar))
+        if self.holyCount != 0:
+            tempChar = ''
+            if self.holyCount > 1:
+                tempChar = 's'
+            print("{} Holy icon{}".format(self.holyCount, tempChar))
+        if self.soldierCount != 0:
+            tempChar = ''
+            if self.soldierCount > 1:
+                tempChar = 's'
+            print("{} Soldier icon{}".format(self.soldierCount, tempChar))
+        if self.workerCount != 0:
+            tempChar = ''
+            if self.workerCount > 1:
+                tempChar = 's'
+            print("{} Worker icon{}".format(self.workerCount, tempChar))
+
+class Domain(Card):
+    def __init__(self, input_name, gold_cost, shadow_count, holy_count, soldier_count, worker_count, vp_reward, has_activation_effect, has_passive_effect, passive_effect, activation_effect, input_text):
+        self.name = input_name
+        self.goldCost = gold_cost
+        self.shadowCount = shadow_count
+        self.holyCount = holy_count
+        self.soldierCount = soldier_count
+        self.workerCount = worker_count
+        self.vpReward = vp_reward
+        self.hasActivationEffect = has_activation_effect
+        self.hasPassiveEffect = has_passive_effect
+        self.passiveEffect = passive_effect
+        self.activationEffect = activation_effect
+        self.text = input_text
+    def display(self):
+        print("\n%s" % self.name)
+        print("Cost: {} Gold".format(self.goldCost))
+        if self.shadowCount != 0:
+            tempChar = ''
+            if self.shadowCount > 1:
+                tempChar = 's'
+            print("{} Shadow icon{}".format(self.shadowCount, tempChar))
+        if self.holyCount != 0:
+            tempChar = ''
+            if self.holyCount > 1:
+                tempChar = 's'
+            print("{} Holy icon{}".format(self.holyCount, tempChar))
+        if self.soldierCount != 0:
+            tempChar = ''
+            if self.soldierCount > 1:
+                tempChar = 's'
+            print("{} Soldier icon{}".format(self.soldierCount, tempChar))
+        if self.workerCount != 0:
+            tempChar = ''
+            if self.workerCount > 1:
+                tempChar = 's'
+            print("{} Worker icon{}".format(self.workerCount, tempChar))
+        print(self.text)
+
+class Monster(Card):
+    def __init__(self, input_name, input_area, input_type, input_order, strength_cost, magic_cost, vp_reward, gold_reward, strength_reward, magic_reward, has_special_reward, special_reward, has_special_cost, special_cost, is_extra):
+        self.name = input_name
+        self.area = input_area
+        self.type = input_type
+        self.order = input_order
+        self.strengthCost = strength_cost
+        self.magicCost = magic_cost
+        self.vpReward = vp_reward
+        self.goldReward = gold_reward
+        self.strengthReward = strength_reward
+        self.magicReward = magic_reward
+        self.hasSpecialReward = has_special_reward
+        self.specialReward = special_reward
+        self.hasSpecialCost = has_special_cost
+        self.specialCost = special_cost
+        self.isExtra = is_extra
+    def display(self):
+        print("{} is a {} from {}".format(self.name, self.type, self.area))
+    def add_strength_cost(self, addedStrength):
+        self.strengthCost = self.strengthCost + addedStrength
+    def add_magic_cost(self, addedMagic):
+        self.magicCost = self.magicCost + addedMagic
+
+class Duke(Card):
+    def __init__(self, input_name, gold_mult, strength_mult, magic_mult, shadow_mult, holy_mult, soldier_mult, worker_mult, monster_mult, citizen_mult, domain_mult, boss_mult, minion_mult, beast_mult, titan_mult):
+        self.name = input_name
+        self.goldMultiplier = gold_mult
+        self.strengthMultiplier = strength_mult
+        self.magicMultiplier = magic_mult
+        self.shadowMultiplier = shadow_mult
+        self.holyMultiplier = holy_mult
+        self.soldierMultiplier = soldier_mult
+        self.workerMultiplier = worker_mult
+        self.monsterMultiplier = monster_mult
+        self.citizenMultiplier = citizen_mult
+        self.domainMultiplier = domain_mult
+        self.bossMultiplier = boss_mult
+        self.minionMultiplier = minion_mult
+        self.beastMultiplier = beast_mult
+        self.titanMultiplier = titan_mult
+        
+    def display(self):
+        print("\n%s" % self.name)
+        if (self.goldMultiplier != self.strengthMultiplier):
+            resourceScore = 1/float(self.strengthMultiplier)
+            print(f"1 Victory Point per gold and {resourceScore:.2f} per Strength/Magic")
+        else:
+            resourceScore = 1/float(self.goldMultiplier)
+            print(f"{resourceScore:.2f} Victory Points per resource")
+        if self.shadowMultiplier != 0:
+            tempChar = ''
+            if self.shadowMultiplier > 1:
+                tempChar = 's'
+            print("{} Victory Point{} per Shadow".format(self.shadowMultiplier, tempChar))
+        if self.holyMultiplier != 0:
+            tempChar = ''
+            if self.holyMultiplier > 1:
+                tempChar = 's'
+            print("{} Victory Point{} per Holy".format(self.holyMultiplier, tempChar))
+        if self.soldierMultiplier != 0:
+            tempChar = ''
+            if self.soldierMultiplier > 1:
+                tempChar = 's'
+            print("{} Victory Point{} per Soldier".format(self.soldierMultiplier, tempChar))
+        if self.workerMultiplier != 0:
+            tempChar = ''
+            if self.workerMultiplier > 1:
+                tempChar = 's'
+            print("{} Victory Point{} per Worker".format(self.workerMultiplier, tempChar))
+        if self.monsterMultiplier != 0:
+            tempChar = ''
+            if self.monsterMultiplier > 1:
+                tempChar = 's'
+            print("{} Victory Point{} per Monster".format(self.monsterMultiplier, tempChar))
+        if self.citizenMultiplier != 0:
+            tempChar = ''
+            if self.citizenMultiplier > 1:
+                tempChar = 's'
+            print("{} Victory Point{} per Citizen".format(self.citizenMultiplier, tempChar))
+        if self.domainMultiplier != 0:
+            tempChar = ''
+            if self.domainMultiplier > 1:
+                tempChar = 's'
+            print("{} Victory Point{} per Domain".format(self.domainMultiplier, tempChar))
+        if self.bossMultiplier != 0:
+            tempChar = ''
+            if self.bossMultiplier > 1:
+                tempChar = 's'
+            print("{} Victory Point{} per Boss".format(self.bossMultiplier, tempChar))
+        if self.titanMultiplier != 0:
+            tempChar = ''
+            if self.titanMultiplier > 1:
+                tempChar = 's'
+            print("{} Victory Point{} per Titan".format(self.titanMultiplier, tempChar))
+   
+
+class Board:
+    def __init__(self, player_count, input_preset):
+        self.playerCount = player_count
+        self.preset = input_preset
+        self.playerList = []
+        self.citizenGrid = []
+        self.domainGrid = []
+        self.monsterGrid = []
+        self.dukeStack = []
+        self.domainStack = []
+        self.citizenStack = []
+        self.monsterStack = []
+        self.dieOne = 0
+        self.dieTwo = 0
+        self.dieSum = 0
+        self.exhaustedCount = 0
+        
+        myConnect = mysql.connector.connect(user='vckonline', password='vckonline', host='localhost', database='vckonline')
+        myCursor = myConnect.cursor(dictionary = True)
+#load game data
+        myCursor.execute("SELECT * FROM dukes")
+        myResult = myCursor.fetchall()
+        for row in myResult:
+            myDuke = Duke(row['name'], row['gold_mult'], row['strength_mult'], row['magic_mult'], row['shadow_mult'], row['holy_mult'], row['soldier_mult'], row['worker_mult'], row['monster_mult'], row['citizen_mult'], row['domain_mult'], row['boss_mult'], row['minion_mult'], row['beast_mult'], row['titan_mult'])
+            self.dukeStack.append(myDuke)
+        random.shuffle(self.dukeStack)
+        #for duke in self.dukeStack:
+        #    duke.display()
+        myCursor.execute("SELECT * FROM domains")
+        myResult = myCursor.fetchall()
+        for row in myResult:
+            myDomain = Domain(row['name'], row['gold_cost'], row['shadow_count'], row['holy_count'], row['soldier_count'], row['worker_count'], row['vp_reward'], row['has_activation_effect'], row['has_passive_effect'], row['passive_effect'], row['activation_effect'], row['text'])
+            self.domainStack.append(myDomain)
+        random.shuffle(self.domainStack)
+        #for domain in self.domainStack:
+        #    domain.display()
+
+        myCursor.execute("SELECT * FROM citizens")
+        myResult = myCursor.fetchall()
+        for row in myResult:
+            myCitizen = Citizen(row['name'], row['gold_cost'], row['roll_match1'], row['roll_match2'], row['shadow_count'], row['holy_count'], row['soldier_count'], row['worker_count'], row['gold_payout_on_turn'], row['gold_payout_off_turn'], row['strength_payout_on_turn'], row['strength_payout_off_turn'], row['magic_payout_on_turn'], row['magic_payout_off_turn'], row['has_special_payout_on_turn'], row['has_special_payout_off_turn'], row['special_payout_on_turn'], row['special_payout_off_turn'], row['special_citizen'])
+            self.citizenStack.append(myCitizen)
+        random.shuffle(self.citizenStack)
+        #for citizen in self.citizenStack:
+        #    citizen.display()
+        
+        myCursor.execute("SELECT * FROM monsters")
+        myResult = myCursor.fetchall()
+        for row in myResult:
+            myMonster = Monster(row['name'], row['area'], row['type'], row['order'], row['strength_cost'], row['magic_cost'], row['vp_reward'], row['gold_reward'], row['strength_reward'], row['magic_reward'], row['has_special_reward'], row['special_reward'], row['has_special_cost'], row['special_cost'], row['is_extra'])
+            self.monsterStack.append(myMonster)
+        #for monster in self.monsterStack:
+        #    monster.display()
+        myConnect.close()
+#end load game data and set up board
+#create player list and establish order
+        for x in range(0, self.playerCount):
+            myPlayer = Player()
+            myPlayer.name = "Player %s" % (x + 1)
+            self.playerList.append(myPlayer)
+        random.shuffle(self.playerList)
+        self.playerList[0].isFirst = True
+            
+#end create player list and establish order
+
+    def roll_phase(self):
+        self.dieOne = random.randint(1, 6)
+        self.dieTwo = random.randint(1, 6)
+        self.dieSum = self.dieOne + self.dieTwo
+        print("{} | {} | {}".format(self.dieOne, self.dieTwo, self.dieSum))
+        for citizen in self.playerList[0].ownedCitizens:
+            if (citizen.rollMatch1 == self.dieOne) or (citizen.rollMatch1 == self.dieTwo) or (citizen.rollMatch1 == self.dieSum) or (citizen.rollMatch2 == self.dieSum):
+                print("{} Payout".format(citizen.name))
+                self.playerList[0].goldScore = self.playerList[0].goldScore + citizen.goldPayoutOnTurn
+                self.playerList[0].strengthScore = self.playerList[0].strengthScore + citizen.strengthPayoutOnTurn
+                self.playerList[0].magicScore = self.playerList[0].magicScore + citizen.magicPayoutOnTurn
+        listIterator = iter(self.playerList)
+        next(listIterator)
+        for player in listIterator:
+            for citizen in player.ownedCitizens:
+                if (citizen.rollMatch1 == self.dieOne) or (citizen.rollMatch1 == self.dieTwo) or (citizen.rollMatch1 == self.dieSum) or (citizen.rollMatch2 == self.dieSum):
+                    print("{} Payout".format(citizen.name))
+                    player.goldScore = player.goldScore + citizen.goldPayoutOffTurn
+                    player.strengthScore = player.strengthScore + citizen.strengthPayoutOffTurn
+                    player.magicScore = player.magicScore + citizen.magicPayoutOffTurn
+    def play_turn(self):
+        print("new turn")
+        print("roll phase")
+        self.roll_phase()
+        
+    def end_check(self):
+        if self.exhaustedCount <= (self.playerCount*2):
+            return False
diff --git a/domains.py b/domains.py
new file mode 100644
index 0000000..e69de29
diff --git a/dukes.py b/dukes.py
new file mode 100644
index 0000000..e69de29
diff --git a/python3-vckonline/bin/Activate.ps1 b/python3-vckonline/bin/Activate.ps1
new file mode 100644
index 0000000..90af274
--- /dev/null
+++ b/python3-vckonline/bin/Activate.ps1
@@ -0,0 +1,241 @@
+<#
+.Synopsis
+Activate a Python virtual environment for the current PowerShell session.
+
+.Description
+Pushes the python executable for a virtual environment to the front of the
+$Env:PATH environment variable and sets the prompt to signify that you are
+in a Python virtual environment. Makes use of the command line switches as
+well as the `pyvenv.cfg` file values present in the virtual environment.
+
+.Parameter VenvDir
+Path to the directory that contains the virtual environment to activate. The
+default value for this is the parent of the directory that the Activate.ps1
+script is located within.
+
+.Parameter Prompt
+The prompt prefix to display when this virtual environment is activated. By
+default, this prompt is the name of the virtual environment folder (VenvDir)
+surrounded by parentheses and followed by a single space (ie. '(.venv) ').
+
+.Example
+Activate.ps1
+Activates the Python virtual environment that contains the Activate.ps1 script.
+
+.Example
+Activate.ps1 -Verbose
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and shows extra information about the activation as it executes.
+
+.Example
+Activate.ps1 -VenvDir C:\Users\MyUser\Common\.venv
+Activates the Python virtual environment located in the specified location.
+
+.Example
+Activate.ps1 -Prompt "MyPython"
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and prefixes the current prompt with the specified string (surrounded in
+parentheses) while the virtual environment is active.
+
+.Notes
+On Windows, it may be required to enable this Activate.ps1 script by setting the
+execution policy for the user. You can do this by issuing the following PowerShell
+command:
+
+PS C:\> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
+
+For more information on Execution Policies: 
+ttps:/go.microsoft.com/fwlink/?LinkID=135170
+
+#>
+Param(
+    [Parameter(Mandatory = $false)]
+    [String]
+    $VenvDir,
+    [Parameter(Mandatory = $false)]
+    [String]
+    $Prompt
+)
+
+<# Function declarations --------------------------------------------------- #>
+
+<#
+.Synopsis
+Remove all shell session elements added by the Activate script, including the
+addition of the virtual environment's Python executable from the beginning of
+the PATH variable.
+
+.Parameter NonDestructive
+If present, do not remove this function from the global namespace for the
+session.
+
+#>
+function global:deactivate ([switch]$NonDestructive) {
+    # Revert to original values
+
+    # The prior prompt:
+    if (Test-Path -Path Function:_OLD_VIRTUAL_PROMPT) {
+        Copy-Item -Path Function:_OLD_VIRTUAL_PROMPT -Destination Function:prompt
+        Remove-Item -Path Function:_OLD_VIRTUAL_PROMPT
+    }
+
+    # The prior PYTHONHOME:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PYTHONHOME) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME -Destination Env:PYTHONHOME
+        Remove-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME
+    }
+
+    # The prior PATH:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PATH) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PATH -Destination Env:PATH
+        Remove-Item -Path Env:_OLD_VIRTUAL_PATH
+    }
+
+    # Just remove the VIRTUAL_ENV altogether:
+    if (Test-Path -Path Env:VIRTUAL_ENV) {
+        Remove-Item -Path env:VIRTUAL_ENV
+    }
+
+    # Just remove the _PYTHON_VENV_PROMPT_PREFIX altogether:
+    if (Get-Variable -Name "_PYTHON_VENV_PROMPT_PREFIX" -ErrorAction SilentlyContinue) {
+        Remove-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Scope Global -Force
+    }
+
+    # Leave deactivate function in the global namespace if requested:
+    if (-not $NonDestructive) {
+        Remove-Item -Path function:deactivate
+    }
+}
+
+<#
+.Description
+Get-PyVenvConfig parses the values from the pyvenv.cfg file located in the
+given folder, and returns them in a map.
+
+For each line in the pyvenv.cfg file, if that line can be parsed into exactly
+two strings separated by `=` (with any amount of whitespace surrounding the =)
+then it is considered a `key = value` line. The left hand string is the key,
+the right hand is the value.
+
+If the value starts with a `'` or a `"` then the first and last character is
+stripped from the value before being captured.
+
+.Parameter ConfigDir
+Path to the directory that contains the `pyvenv.cfg` file.
+#>
+function Get-PyVenvConfig(
+    [String]
+    $ConfigDir
+) {
+    Write-Verbose "Given ConfigDir=$ConfigDir, obtain values in pyvenv.cfg"
+
+    # Ensure the file exists, and issue a warning if it doesn't (but still allow the function to continue).
+    $pyvenvConfigPath = Join-Path -Resolve -Path $ConfigDir -ChildPath 'pyvenv.cfg' -ErrorAction Continue
+
+    # An empty map will be returned if no config file is found.
+    $pyvenvConfig = @{ }
+
+    if ($pyvenvConfigPath) {
+
+        Write-Verbose "File exists, parse `key = value` lines"
+        $pyvenvConfigContent = Get-Content -Path $pyvenvConfigPath
+
+        $pyvenvConfigContent | ForEach-Object {
+            $keyval = $PSItem -split "\s*=\s*", 2
+            if ($keyval[0] -and $keyval[1]) {
+                $val = $keyval[1]
+
+                # Remove extraneous quotations around a string value.
+                if ("'""".Contains($val.Substring(0, 1))) {
+                    $val = $val.Substring(1, $val.Length - 2)
+                }
+
+                $pyvenvConfig[$keyval[0]] = $val
+                Write-Verbose "Adding Key: '$($keyval[0])'='$val'"
+            }
+        }
+    }
+    return $pyvenvConfig
+}
+
+
+<# Begin Activate script --------------------------------------------------- #>
+
+# Determine the containing directory of this script
+$VenvExecPath = Split-Path -Parent $MyInvocation.MyCommand.Definition
+$VenvExecDir = Get-Item -Path $VenvExecPath
+
+Write-Verbose "Activation script is located in path: '$VenvExecPath'"
+Write-Verbose "VenvExecDir Fullname: '$($VenvExecDir.FullName)"
+Write-Verbose "VenvExecDir Name: '$($VenvExecDir.Name)"
+
+# Set values required in priority: CmdLine, ConfigFile, Default
+# First, get the location of the virtual environment, it might not be
+# VenvExecDir if specified on the command line.
+if ($VenvDir) {
+    Write-Verbose "VenvDir given as parameter, using '$VenvDir' to determine values"
+}
+else {
+    Write-Verbose "VenvDir not given as a parameter, using parent directory name as VenvDir."
+    $VenvDir = $VenvExecDir.Parent.FullName.TrimEnd("\\/")
+    Write-Verbose "VenvDir=$VenvDir"
+}
+
+# Next, read the `pyvenv.cfg` file to determine any required value such
+# as `prompt`.
+$pyvenvCfg = Get-PyVenvConfig -ConfigDir $VenvDir
+
+# Next, set the prompt from the command line, or the config file, or
+# just use the name of the virtual environment folder.
+if ($Prompt) {
+    Write-Verbose "Prompt specified as argument, using '$Prompt'"
+}
+else {
+    Write-Verbose "Prompt not specified as argument to script, checking pyvenv.cfg value"
+    if ($pyvenvCfg -and $pyvenvCfg['prompt']) {
+        Write-Verbose "  Setting based on value in pyvenv.cfg='$($pyvenvCfg['prompt'])'"
+        $Prompt = $pyvenvCfg['prompt'];
+    }
+    else {
+        Write-Verbose "  Setting prompt based on parent's directory's name. (Is the directory name passed to venv module when creating the virutal environment)"
+        Write-Verbose "  Got leaf-name of $VenvDir='$(Split-Path -Path $venvDir -Leaf)'"
+        $Prompt = Split-Path -Path $venvDir -Leaf
+    }
+}
+
+Write-Verbose "Prompt = '$Prompt'"
+Write-Verbose "VenvDir='$VenvDir'"
+
+# Deactivate any currently active virtual environment, but leave the
+# deactivate function in place.
+deactivate -nondestructive
+
+# Now set the environment variable VIRTUAL_ENV, used by many tools to determine
+# that there is an activated venv.
+$env:VIRTUAL_ENV = $VenvDir
+
+if (-not $Env:VIRTUAL_ENV_DISABLE_PROMPT) {
+
+    Write-Verbose "Setting prompt to '$Prompt'"
+
+    # Set the prompt to include the env name
+    # Make sure _OLD_VIRTUAL_PROMPT is global
+    function global:_OLD_VIRTUAL_PROMPT { "" }
+    Copy-Item -Path function:prompt -Destination function:_OLD_VIRTUAL_PROMPT
+    New-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Description "Python virtual environment prompt prefix" -Scope Global -Option ReadOnly -Visibility Public -Value $Prompt
+
+    function global:prompt {
+        Write-Host -NoNewline -ForegroundColor Green "($_PYTHON_VENV_PROMPT_PREFIX) "
+        _OLD_VIRTUAL_PROMPT
+    }
+}
+
+# Clear PYTHONHOME
+if (Test-Path -Path Env:PYTHONHOME) {
+    Copy-Item -Path Env:PYTHONHOME -Destination Env:_OLD_VIRTUAL_PYTHONHOME
+    Remove-Item -Path Env:PYTHONHOME
+}
+
+# Add the venv to the PATH
+Copy-Item -Path Env:PATH -Destination Env:_OLD_VIRTUAL_PATH
+$Env:PATH = "$VenvExecDir$([System.IO.Path]::PathSeparator)$Env:PATH"
diff --git a/python3-vckonline/bin/activate b/python3-vckonline/bin/activate
new file mode 100644
index 0000000..c1c843e
--- /dev/null
+++ b/python3-vckonline/bin/activate
@@ -0,0 +1,76 @@
+# This file must be used with "source bin/activate" *from bash*
+# you cannot run it directly
+
+deactivate () {
+    # reset old environment variables
+    if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then
+        PATH="${_OLD_VIRTUAL_PATH:-}"
+        export PATH
+        unset _OLD_VIRTUAL_PATH
+    fi
+    if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then
+        PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}"
+        export PYTHONHOME
+        unset _OLD_VIRTUAL_PYTHONHOME
+    fi
+
+    # This should detect bash and zsh, which have a hash command that must
+    # be called to get it to forget past commands.  Without forgetting
+    # past commands the $PATH changes we made may not be respected
+    if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
+        hash -r
+    fi
+
+    if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then
+        PS1="${_OLD_VIRTUAL_PS1:-}"
+        export PS1
+        unset _OLD_VIRTUAL_PS1
+    fi
+
+    unset VIRTUAL_ENV
+    if [ ! "${1:-}" = "nondestructive" ] ; then
+    # Self destruct!
+        unset -f deactivate
+    fi
+}
+
+# unset irrelevant variables
+deactivate nondestructive
+
+VIRTUAL_ENV="/home/lukesau/dev/vckonline/python3-vckonline"
+export VIRTUAL_ENV
+
+_OLD_VIRTUAL_PATH="$PATH"
+PATH="$VIRTUAL_ENV/bin:$PATH"
+export PATH
+
+# unset PYTHONHOME if set
+# this will fail if PYTHONHOME is set to the empty string (which is bad anyway)
+# could use `if (set -u; : $PYTHONHOME) ;` in bash
+if [ -n "${PYTHONHOME:-}" ] ; then
+    _OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}"
+    unset PYTHONHOME
+fi
+
+if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then
+    _OLD_VIRTUAL_PS1="${PS1:-}"
+    if [ "x(python3-vckonline) " != x ] ; then
+	PS1="(python3-vckonline) ${PS1:-}"
+    else
+    if [ "`basename \"$VIRTUAL_ENV\"`" = "__" ] ; then
+        # special case for Aspen magic directories
+        # see http://www.zetadev.com/software/aspen/
+        PS1="[`basename \`dirname \"$VIRTUAL_ENV\"\``] $PS1"
+    else
+        PS1="(`basename \"$VIRTUAL_ENV\"`)$PS1"
+    fi
+    fi
+    export PS1
+fi
+
+# This should detect bash and zsh, which have a hash command that must
+# be called to get it to forget past commands.  Without forgetting
+# past commands the $PATH changes we made may not be respected
+if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
+    hash -r
+fi
diff --git a/python3-vckonline/bin/activate.csh b/python3-vckonline/bin/activate.csh
new file mode 100644
index 0000000..f08b9c5
--- /dev/null
+++ b/python3-vckonline/bin/activate.csh
@@ -0,0 +1,37 @@
+# This file must be used with "source bin/activate.csh" *from csh*.
+# You cannot run it directly.
+# Created by Davide Di Blasi <davidedb@gmail.com>.
+# Ported to Python 3.3 venv by Andrew Svetlov <andrew.svetlov@gmail.com>
+
+alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; test "\!:*" != "nondestructive" && unalias deactivate'
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+setenv VIRTUAL_ENV "/home/lukesau/dev/vckonline/python3-vckonline"
+
+set _OLD_VIRTUAL_PATH="$PATH"
+setenv PATH "$VIRTUAL_ENV/bin:$PATH"
+
+
+set _OLD_VIRTUAL_PROMPT="$prompt"
+
+if (! "$?VIRTUAL_ENV_DISABLE_PROMPT") then
+    if ("python3-vckonline" != "") then
+        set env_name = "python3-vckonline"
+    else
+        if (`basename "VIRTUAL_ENV"` == "__") then
+            # special case for Aspen magic directories
+            # see http://www.zetadev.com/software/aspen/
+            set env_name = `basename \`dirname "$VIRTUAL_ENV"\``
+        else
+            set env_name = `basename "$VIRTUAL_ENV"`
+        endif
+    endif
+    set prompt = "[$env_name] $prompt"
+    unset env_name
+endif
+
+alias pydoc python -m pydoc
+
+rehash
diff --git a/python3-vckonline/bin/activate.fish b/python3-vckonline/bin/activate.fish
new file mode 100644
index 0000000..364229e
--- /dev/null
+++ b/python3-vckonline/bin/activate.fish
@@ -0,0 +1,75 @@
+# This file must be used with ". bin/activate.fish" *from fish* (http://fishshell.org)
+# you cannot run it directly
+
+function deactivate  -d "Exit virtualenv and return to normal shell environment"
+    # reset old environment variables
+    if test -n "$_OLD_VIRTUAL_PATH"
+        set -gx PATH $_OLD_VIRTUAL_PATH
+        set -e _OLD_VIRTUAL_PATH
+    end
+    if test -n "$_OLD_VIRTUAL_PYTHONHOME"
+        set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME
+        set -e _OLD_VIRTUAL_PYTHONHOME
+    end
+
+    if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
+        functions -e fish_prompt
+        set -e _OLD_FISH_PROMPT_OVERRIDE
+        functions -c _old_fish_prompt fish_prompt
+        functions -e _old_fish_prompt
+    end
+
+    set -e VIRTUAL_ENV
+    if test "$argv[1]" != "nondestructive"
+        # Self destruct!
+        functions -e deactivate
+    end
+end
+
+# unset irrelevant variables
+deactivate nondestructive
+
+set -gx VIRTUAL_ENV "/home/lukesau/dev/vckonline/python3-vckonline"
+
+set -gx _OLD_VIRTUAL_PATH $PATH
+set -gx PATH "$VIRTUAL_ENV/bin" $PATH
+
+# unset PYTHONHOME if set
+if set -q PYTHONHOME
+    set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
+    set -e PYTHONHOME
+end
+
+if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
+    # fish uses a function instead of an env var to generate the prompt.
+
+    # save the current fish_prompt function as the function _old_fish_prompt
+    functions -c fish_prompt _old_fish_prompt
+
+    # with the original prompt function renamed, we can override with our own.
+    function fish_prompt
+        # Save the return status of the last command
+        set -l old_status $status
+
+        # Prompt override?
+        if test -n "(python3-vckonline) "
+            printf "%s%s" "(python3-vckonline) " (set_color normal)
+        else
+            # ...Otherwise, prepend env
+            set -l _checkbase (basename "$VIRTUAL_ENV")
+            if test $_checkbase = "__"
+                # special case for Aspen magic directories
+                # see http://www.zetadev.com/software/aspen/
+                printf "%s[%s]%s " (set_color -b blue white) (basename (dirname "$VIRTUAL_ENV")) (set_color normal)
+            else
+                printf "%s(%s)%s" (set_color -b blue white) (basename "$VIRTUAL_ENV") (set_color normal)
+            end
+        end
+
+        # Restore the return status of the previous command.
+        echo "exit $old_status" | .
+        _old_fish_prompt
+    end
+
+    set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
+end
diff --git a/python3-vckonline/bin/conf b/python3-vckonline/bin/conf
new file mode 100755
index 0000000..201f2d6
--- /dev/null
+++ b/python3-vckonline/bin/conf
@@ -0,0 +1,8 @@
+#!/home/lukesau/dev/vckonline/python3-vckonline/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from conf.scripts import start
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(start())
diff --git a/python3-vckonline/bin/easy_install b/python3-vckonline/bin/easy_install
new file mode 100755
index 0000000..39eed1a
--- /dev/null
+++ b/python3-vckonline/bin/easy_install
@@ -0,0 +1,8 @@
+#!/home/lukesau/dev/vckonline/python3-vckonline/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from setuptools.command.easy_install import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/python3-vckonline/bin/easy_install-3.8 b/python3-vckonline/bin/easy_install-3.8
new file mode 100755
index 0000000..39eed1a
--- /dev/null
+++ b/python3-vckonline/bin/easy_install-3.8
@@ -0,0 +1,8 @@
+#!/home/lukesau/dev/vckonline/python3-vckonline/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from setuptools.command.easy_install import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/python3-vckonline/bin/flask b/python3-vckonline/bin/flask
new file mode 100755
index 0000000..ee4234f
--- /dev/null
+++ b/python3-vckonline/bin/flask
@@ -0,0 +1,8 @@
+#!/home/lukesau/dev/vckonline/python3-vckonline/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from flask.cli import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/python3-vckonline/bin/pip b/python3-vckonline/bin/pip
new file mode 100755
index 0000000..35f86fd
--- /dev/null
+++ b/python3-vckonline/bin/pip
@@ -0,0 +1,8 @@
+#!/home/lukesau/dev/vckonline/python3-vckonline/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/python3-vckonline/bin/pip3 b/python3-vckonline/bin/pip3
new file mode 100755
index 0000000..35f86fd
--- /dev/null
+++ b/python3-vckonline/bin/pip3
@@ -0,0 +1,8 @@
+#!/home/lukesau/dev/vckonline/python3-vckonline/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/python3-vckonline/bin/pip3.8 b/python3-vckonline/bin/pip3.8
new file mode 100755
index 0000000..35f86fd
--- /dev/null
+++ b/python3-vckonline/bin/pip3.8
@@ -0,0 +1,8 @@
+#!/home/lukesau/dev/vckonline/python3-vckonline/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/python3-vckonline/bin/pop-seed b/python3-vckonline/bin/pop-seed
new file mode 100755
index 0000000..48007d9
--- /dev/null
+++ b/python3-vckonline/bin/pop-seed
@@ -0,0 +1,8 @@
+#!/home/lukesau/dev/vckonline/python3-vckonline/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pop.scripts import pop_seed
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(pop_seed())
diff --git a/python3-vckonline/bin/python b/python3-vckonline/bin/python
new file mode 120000
index 0000000..b8a0adb
--- /dev/null
+++ b/python3-vckonline/bin/python
@@ -0,0 +1 @@
+python3
\ No newline at end of file
diff --git a/python3-vckonline/bin/python3 b/python3-vckonline/bin/python3
new file mode 120000
index 0000000..ae65fda
--- /dev/null
+++ b/python3-vckonline/bin/python3
@@ -0,0 +1 @@
+/usr/bin/python3
\ No newline at end of file
diff --git a/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/LICENSE.rst b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/LICENSE.rst
new file mode 100644
index 0000000..9d227a0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/LICENSE.rst
@@ -0,0 +1,28 @@
+Copyright 2010 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/METADATA
new file mode 100644
index 0000000..db7fcd1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/METADATA
@@ -0,0 +1,137 @@
+Metadata-Version: 2.1
+Name: Flask
+Version: 1.1.2
+Summary: A simple framework for building complex web applications.
+Home-page: https://palletsprojects.com/p/flask/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Documentation, https://flask.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/flask
+Project-URL: Issue tracker, https://github.com/pallets/flask/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Web Environment
+Classifier: Framework :: Flask
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Internet :: WWW/HTTP :: WSGI :: Application
+Classifier: Topic :: Software Development :: Libraries :: Application Frameworks
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+Requires-Dist: Werkzeug (>=0.15)
+Requires-Dist: Jinja2 (>=2.10.1)
+Requires-Dist: itsdangerous (>=0.24)
+Requires-Dist: click (>=5.1)
+Provides-Extra: dev
+Requires-Dist: pytest ; extra == 'dev'
+Requires-Dist: coverage ; extra == 'dev'
+Requires-Dist: tox ; extra == 'dev'
+Requires-Dist: sphinx ; extra == 'dev'
+Requires-Dist: pallets-sphinx-themes ; extra == 'dev'
+Requires-Dist: sphinxcontrib-log-cabinet ; extra == 'dev'
+Requires-Dist: sphinx-issues ; extra == 'dev'
+Provides-Extra: docs
+Requires-Dist: sphinx ; extra == 'docs'
+Requires-Dist: pallets-sphinx-themes ; extra == 'docs'
+Requires-Dist: sphinxcontrib-log-cabinet ; extra == 'docs'
+Requires-Dist: sphinx-issues ; extra == 'docs'
+Provides-Extra: dotenv
+Requires-Dist: python-dotenv ; extra == 'dotenv'
+
+Flask
+=====
+
+Flask is a lightweight `WSGI`_ web application framework. It is designed
+to make getting started quick and easy, with the ability to scale up to
+complex applications. It began as a simple wrapper around `Werkzeug`_
+and `Jinja`_ and has become one of the most popular Python web
+application frameworks.
+
+Flask offers suggestions, but doesn't enforce any dependencies or
+project layout. It is up to the developer to choose the tools and
+libraries they want to use. There are many extensions provided by the
+community that make adding new functionality easy.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    pip install -U Flask
+
+
+A Simple Example
+----------------
+
+.. code-block:: python
+
+    from flask import Flask
+
+    app = Flask(__name__)
+
+    @app.route("/")
+    def hello():
+        return "Hello, World!"
+
+.. code-block:: text
+
+    $ env FLASK_APP=hello.py flask run
+     * Serving Flask app "hello"
+     * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
+
+
+Contributing
+------------
+
+For guidance on setting up a development environment and how to make a
+contribution to Flask, see the `contributing guidelines`_.
+
+.. _contributing guidelines: https://github.com/pallets/flask/blob/master/CONTRIBUTING.rst
+
+
+Donate
+------
+
+The Pallets organization develops and supports Flask and the libraries
+it uses. In order to grow the community of contributors and users, and
+allow the maintainers to devote more time to the projects, `please
+donate today`_.
+
+.. _please donate today: https://psfmember.org/civicrm/contribute/transact?reset=1&id=20
+
+
+Links
+-----
+
+* Website: https://palletsprojects.com/p/flask/
+* Documentation: https://flask.palletsprojects.com/
+* Releases: https://pypi.org/project/Flask/
+* Code: https://github.com/pallets/flask
+* Issue tracker: https://github.com/pallets/flask/issues
+* Test status: https://dev.azure.com/pallets/flask/_build
+* Official chat: https://discord.gg/t6rrQZH
+
+.. _WSGI: https://wsgi.readthedocs.io
+.. _Werkzeug: https://www.palletsprojects.com/p/werkzeug/
+.. _Jinja: https://www.palletsprojects.com/p/jinja/
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/RECORD
new file mode 100644
index 0000000..505021c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/RECORD
@@ -0,0 +1,48 @@
+../../../bin/flask,sha256=98Kkf8ifDYj3i_HtgXsQicxHntmKxSwxdg2vMOEq_IA,249
+Flask-1.1.2.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+Flask-1.1.2.dist-info/LICENSE.rst,sha256=SJqOEQhQntmKN7uYPhHg9-HTHwvY-Zp5yESOf_N9B-o,1475
+Flask-1.1.2.dist-info/METADATA,sha256=3INpPWH6nKfZ33R2N-bQZy4TOe1wQCMweZc9mwcNrtc,4591
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diff --git a/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/WHEEL
new file mode 100644
index 0000000..8b701e9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.33.6)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/entry_points.txt b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/entry_points.txt
new file mode 100644
index 0000000..1eb0252
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/entry_points.txt
@@ -0,0 +1,3 @@
+[console_scripts]
+flask = flask.cli:main
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/top_level.txt
new file mode 100644
index 0000000..7e10602
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Flask-1.1.2.dist-info/top_level.txt
@@ -0,0 +1 @@
+flask
diff --git a/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/LICENSE.rst b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/LICENSE.rst
new file mode 100644
index 0000000..c37cae4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/LICENSE.rst
@@ -0,0 +1,28 @@
+Copyright 2007 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/METADATA
new file mode 100644
index 0000000..55c0f82
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/METADATA
@@ -0,0 +1,106 @@
+Metadata-Version: 2.1
+Name: Jinja2
+Version: 2.11.2
+Summary: A very fast and expressive template engine.
+Home-page: https://palletsprojects.com/p/jinja/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Documentation, https://jinja.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/jinja
+Project-URL: Issue tracker, https://github.com/pallets/jinja/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Web Environment
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Classifier: Topic :: Text Processing :: Markup :: HTML
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+Description-Content-Type: text/x-rst
+Requires-Dist: MarkupSafe (>=0.23)
+Provides-Extra: i18n
+Requires-Dist: Babel (>=0.8) ; extra == 'i18n'
+
+Jinja
+=====
+
+Jinja is a fast, expressive, extensible templating engine. Special
+placeholders in the template allow writing code similar to Python
+syntax. Then the template is passed data to render the final document.
+
+It includes:
+
+-   Template inheritance and inclusion.
+-   Define and import macros within templates.
+-   HTML templates can use autoescaping to prevent XSS from untrusted
+    user input.
+-   A sandboxed environment can safely render untrusted templates.
+-   AsyncIO support for generating templates and calling async
+    functions.
+-   I18N support with Babel.
+-   Templates are compiled to optimized Python code just-in-time and
+    cached, or can be compiled ahead-of-time.
+-   Exceptions point to the correct line in templates to make debugging
+    easier.
+-   Extensible filters, tests, functions, and even syntax.
+
+Jinja's philosophy is that while application logic belongs in Python if
+possible, it shouldn't make the template designer's job difficult by
+restricting functionality too much.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    $ pip install -U Jinja2
+
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
+In A Nutshell
+-------------
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+    {% block title %}Members{% endblock %}
+    {% block content %}
+      <ul>
+      {% for user in users %}
+        <li><a href="{{ user.url }}">{{ user.username }}</a></li>
+      {% endfor %}
+      </ul>
+    {% endblock %}
+
+
+Links
+-----
+
+-   Website: https://palletsprojects.com/p/jinja/
+-   Documentation: https://jinja.palletsprojects.com/
+-   Releases: https://pypi.org/project/Jinja2/
+-   Code: https://github.com/pallets/jinja
+-   Issue tracker: https://github.com/pallets/jinja/issues
+-   Test status: https://dev.azure.com/pallets/jinja/_build
+-   Official chat: https://discord.gg/t6rrQZH
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/RECORD
new file mode 100644
index 0000000..413fef4
--- /dev/null
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diff --git a/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/WHEEL
new file mode 100644
index 0000000..ef99c6c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/entry_points.txt b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/entry_points.txt
new file mode 100644
index 0000000..3619483
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/entry_points.txt
@@ -0,0 +1,3 @@
+[babel.extractors]
+jinja2 = jinja2.ext:babel_extract [i18n]
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/top_level.txt
new file mode 100644
index 0000000..7f7afbf
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Jinja2-2.11.2.dist-info/top_level.txt
@@ -0,0 +1 @@
+jinja2
diff --git a/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/LICENSE.txt b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/LICENSE.txt
new file mode 100644
index 0000000..9d227a0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/LICENSE.txt
@@ -0,0 +1,28 @@
+Copyright 2010 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/METADATA
new file mode 100644
index 0000000..c50370d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/METADATA
@@ -0,0 +1,105 @@
+Metadata-Version: 2.1
+Name: MarkupSafe
+Version: 1.1.1
+Summary: Safely add untrusted strings to HTML/XML markup.
+Home-page: https://palletsprojects.com/p/markupsafe/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: The Pallets Team
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Documentation, https://markupsafe.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/markupsafe
+Project-URL: Issue tracker, https://github.com/pallets/markupsafe/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Web Environment
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.4
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Classifier: Topic :: Text Processing :: Markup :: HTML
+Requires-Python: >=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*
+Description-Content-Type: text/x-rst
+
+MarkupSafe
+==========
+
+MarkupSafe implements a text object that escapes characters so it is
+safe to use in HTML and XML. Characters that have special meanings are
+replaced so that they display as the actual characters. This mitigates
+injection attacks, meaning untrusted user input can safely be displayed
+on a page.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    pip install -U MarkupSafe
+
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
+Examples
+--------
+
+.. code-block:: pycon
+
+    >>> from markupsafe import Markup, escape
+    >>> # escape replaces special characters and wraps in Markup
+    >>> escape('<script>alert(document.cookie);</script>')
+    Markup(u'&lt;script&gt;alert(document.cookie);&lt;/script&gt;')
+    >>> # wrap in Markup to mark text "safe" and prevent escaping
+    >>> Markup('<strong>Hello</strong>')
+    Markup('<strong>hello</strong>')
+    >>> escape(Markup('<strong>Hello</strong>'))
+    Markup('<strong>hello</strong>')
+    >>> # Markup is a text subclass (str on Python 3, unicode on Python 2)
+    >>> # methods and operators escape their arguments
+    >>> template = Markup("Hello <em>%s</em>")
+    >>> template % '"World"'
+    Markup('Hello <em>&#34;World&#34;</em>')
+
+
+Donate
+------
+
+The Pallets organization develops and supports MarkupSafe and other
+libraries that use it. In order to grow the community of contributors
+and users, and allow the maintainers to devote more time to the
+projects, `please donate today`_.
+
+.. _please donate today: https://palletsprojects.com/donate
+
+
+Links
+-----
+
+*   Website: https://palletsprojects.com/p/markupsafe/
+*   Documentation: https://markupsafe.palletsprojects.com/
+*   License: `BSD-3-Clause <https://github.com/pallets/markupsafe/blob/master/LICENSE.rst>`_
+*   Releases: https://pypi.org/project/MarkupSafe/
+*   Code: https://github.com/pallets/markupsafe
+*   Issue tracker: https://github.com/pallets/markupsafe/issues
+*   Test status:
+
+    *   Linux, Mac: https://travis-ci.org/pallets/markupsafe
+    *   Windows: https://ci.appveyor.com/project/pallets/markupsafe
+
+*   Test coverage: https://codecov.io/gh/pallets/markupsafe
+*   Official chat: https://discord.gg/t6rrQZH
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/RECORD
new file mode 100644
index 0000000..95c3339
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/RECORD
@@ -0,0 +1,16 @@
+MarkupSafe-1.1.1.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+MarkupSafe-1.1.1.dist-info/LICENSE.txt,sha256=SJqOEQhQntmKN7uYPhHg9-HTHwvY-Zp5yESOf_N9B-o,1475
+MarkupSafe-1.1.1.dist-info/METADATA,sha256=IFCP4hCNGjXJgMoSvdjPiKDLAMUTTWoxKXQsQvmyMNU,3653
+MarkupSafe-1.1.1.dist-info/RECORD,,
+MarkupSafe-1.1.1.dist-info/WHEEL,sha256=VEyGcIFAmk_1KbI6gaZGw_mMiT-pdGweASQLX-DzYaY,108
+MarkupSafe-1.1.1.dist-info/top_level.txt,sha256=qy0Plje5IJuvsCBjejJyhDCjEAdcDLK_2agVcex8Z6U,11
+markupsafe/__init__.py,sha256=oTblO5f9KFM-pvnq9bB0HgElnqkJyqHnFN1Nx2NIvnY,10126
+markupsafe/__pycache__/__init__.cpython-38.pyc,,
+markupsafe/__pycache__/_compat.cpython-38.pyc,,
+markupsafe/__pycache__/_constants.cpython-38.pyc,,
+markupsafe/__pycache__/_native.cpython-38.pyc,,
+markupsafe/_compat.py,sha256=uEW1ybxEjfxIiuTbRRaJpHsPFf4yQUMMKaPgYEC5XbU,558
+markupsafe/_constants.py,sha256=zo2ajfScG-l1Sb_52EP3MlDCqO7Y1BVHUXXKRsVDRNk,4690
+markupsafe/_native.py,sha256=d-8S_zzYt2y512xYcuSxq0NeG2DUUvG80wVdTn-4KI8,1873
+markupsafe/_speedups.c,sha256=k0fzEIK3CP6MmMqeY0ob43TP90mVN0DTyn7BAl3RqSg,9884
+markupsafe/_speedups.cpython-38-x86_64-linux-gnu.so,sha256=SbJwN321Xn7OPYGv5a6Ghzga75uT8RHQUGkoQUASF-o,48016
diff --git a/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/WHEEL
new file mode 100644
index 0000000..ae40efd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.31.1)
+Root-Is-Purelib: false
+Tag: cp38-cp38-manylinux1_x86_64
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/top_level.txt
new file mode 100644
index 0000000..75bf729
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/MarkupSafe-1.1.1.dist-info/top_level.txt
@@ -0,0 +1 @@
+markupsafe
diff --git a/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/PKG-INFO b/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/PKG-INFO
new file mode 100644
index 0000000..c0c7517
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/PKG-INFO
@@ -0,0 +1,39 @@
+Metadata-Version: 1.2
+Name: PyYAML
+Version: 5.3.1
+Summary: YAML parser and emitter for Python
+Home-page: https://github.com/yaml/pyyaml
+Author: Kirill Simonov
+Author-email: xi@resolvent.net
+License: MIT
+Download-URL: https://pypi.org/project/PyYAML/
+Description: YAML is a data serialization format designed for human readability
+        and interaction with scripting languages.  PyYAML is a YAML parser
+        and emitter for Python.
+        
+        PyYAML features a complete YAML 1.1 parser, Unicode support, pickle
+        support, capable extension API, and sensible error messages.  PyYAML
+        supports standard YAML tags and provides Python-specific tags that
+        allow to represent an arbitrary Python object.
+        
+        PyYAML is applicable for a broad range of tasks from complex
+        configuration files to object serialization and persistence.
+Platform: Any
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Cython
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Classifier: Topic :: Text Processing :: Markup
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
diff --git a/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/SOURCES.txt b/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/SOURCES.txt
new file mode 100644
index 0000000..5e06efc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/SOURCES.txt
@@ -0,0 +1,29 @@
+LICENSE
+README
+setup.cfg
+setup.py
+ext/_yaml.c
+ext/_yaml.h
+ext/_yaml.pxd
+ext/_yaml.pyx
+lib3/PyYAML.egg-info/PKG-INFO
+lib3/PyYAML.egg-info/SOURCES.txt
+lib3/PyYAML.egg-info/dependency_links.txt
+lib3/PyYAML.egg-info/top_level.txt
+lib3/yaml/__init__.py
+lib3/yaml/composer.py
+lib3/yaml/constructor.py
+lib3/yaml/cyaml.py
+lib3/yaml/dumper.py
+lib3/yaml/emitter.py
+lib3/yaml/error.py
+lib3/yaml/events.py
+lib3/yaml/loader.py
+lib3/yaml/nodes.py
+lib3/yaml/parser.py
+lib3/yaml/reader.py
+lib3/yaml/representer.py
+lib3/yaml/resolver.py
+lib3/yaml/scanner.py
+lib3/yaml/serializer.py
+lib3/yaml/tokens.py
\ No newline at end of file
diff --git a/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/dependency_links.txt b/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/dependency_links.txt
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/dependency_links.txt
@@ -0,0 +1 @@
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/installed-files.txt b/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/installed-files.txt
new file mode 100644
index 0000000..4ff277b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/installed-files.txt
@@ -0,0 +1,38 @@
+../yaml/__init__.py
+../yaml/__pycache__/__init__.cpython-38.pyc
+../yaml/__pycache__/composer.cpython-38.pyc
+../yaml/__pycache__/constructor.cpython-38.pyc
+../yaml/__pycache__/cyaml.cpython-38.pyc
+../yaml/__pycache__/dumper.cpython-38.pyc
+../yaml/__pycache__/emitter.cpython-38.pyc
+../yaml/__pycache__/error.cpython-38.pyc
+../yaml/__pycache__/events.cpython-38.pyc
+../yaml/__pycache__/loader.cpython-38.pyc
+../yaml/__pycache__/nodes.cpython-38.pyc
+../yaml/__pycache__/parser.cpython-38.pyc
+../yaml/__pycache__/reader.cpython-38.pyc
+../yaml/__pycache__/representer.cpython-38.pyc
+../yaml/__pycache__/resolver.cpython-38.pyc
+../yaml/__pycache__/scanner.cpython-38.pyc
+../yaml/__pycache__/serializer.cpython-38.pyc
+../yaml/__pycache__/tokens.cpython-38.pyc
+../yaml/composer.py
+../yaml/constructor.py
+../yaml/cyaml.py
+../yaml/dumper.py
+../yaml/emitter.py
+../yaml/error.py
+../yaml/events.py
+../yaml/loader.py
+../yaml/nodes.py
+../yaml/parser.py
+../yaml/reader.py
+../yaml/representer.py
+../yaml/resolver.py
+../yaml/scanner.py
+../yaml/serializer.py
+../yaml/tokens.py
+PKG-INFO
+SOURCES.txt
+dependency_links.txt
+top_level.txt
diff --git a/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/top_level.txt
new file mode 100644
index 0000000..e6475e9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/PyYAML-5.3.1-py3.8.egg-info/top_level.txt
@@ -0,0 +1,2 @@
+_yaml
+yaml
diff --git a/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/LICENSE.rst b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/LICENSE.rst
new file mode 100644
index 0000000..c37cae4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/LICENSE.rst
@@ -0,0 +1,28 @@
+Copyright 2007 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/METADATA
new file mode 100644
index 0000000..eb5f709
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/METADATA
@@ -0,0 +1,128 @@
+Metadata-Version: 2.1
+Name: Werkzeug
+Version: 1.0.1
+Summary: The comprehensive WSGI web application library.
+Home-page: https://palletsprojects.com/p/werkzeug/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Documentation, https://werkzeug.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/werkzeug
+Project-URL: Issue tracker, https://github.com/pallets/werkzeug/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Web Environment
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Internet :: WWW/HTTP :: WSGI
+Classifier: Topic :: Internet :: WWW/HTTP :: WSGI :: Application
+Classifier: Topic :: Internet :: WWW/HTTP :: WSGI :: Middleware
+Classifier: Topic :: Software Development :: Libraries :: Application Frameworks
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+Description-Content-Type: text/x-rst
+Provides-Extra: dev
+Requires-Dist: pytest ; extra == 'dev'
+Requires-Dist: pytest-timeout ; extra == 'dev'
+Requires-Dist: coverage ; extra == 'dev'
+Requires-Dist: tox ; extra == 'dev'
+Requires-Dist: sphinx ; extra == 'dev'
+Requires-Dist: pallets-sphinx-themes ; extra == 'dev'
+Requires-Dist: sphinx-issues ; extra == 'dev'
+Provides-Extra: watchdog
+Requires-Dist: watchdog ; extra == 'watchdog'
+
+Werkzeug
+========
+
+*werkzeug* German noun: "tool". Etymology: *werk* ("work"), *zeug* ("stuff")
+
+Werkzeug is a comprehensive `WSGI`_ web application library. It began as
+a simple collection of various utilities for WSGI applications and has
+become one of the most advanced WSGI utility libraries.
+
+It includes:
+
+-   An interactive debugger that allows inspecting stack traces and
+    source code in the browser with an interactive interpreter for any
+    frame in the stack.
+-   A full-featured request object with objects to interact with
+    headers, query args, form data, files, and cookies.
+-   A response object that can wrap other WSGI applications and handle
+    streaming data.
+-   A routing system for matching URLs to endpoints and generating URLs
+    for endpoints, with an extensible system for capturing variables
+    from URLs.
+-   HTTP utilities to handle entity tags, cache control, dates, user
+    agents, cookies, files, and more.
+-   A threaded WSGI server for use while developing applications
+    locally.
+-   A test client for simulating HTTP requests during testing without
+    requiring running a server.
+
+Werkzeug is Unicode aware and doesn't enforce any dependencies. It is up
+to the developer to choose a template engine, database adapter, and even
+how to handle requests. It can be used to build all sorts of end user
+applications such as blogs, wikis, or bulletin boards.
+
+`Flask`_ wraps Werkzeug, using it to handle the details of WSGI while
+providing more structure and patterns for defining powerful
+applications.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    pip install -U Werkzeug
+
+
+A Simple Example
+----------------
+
+.. code-block:: python
+
+    from werkzeug.wrappers import Request, Response
+
+    @Request.application
+    def application(request):
+        return Response('Hello, World!')
+
+    if __name__ == '__main__':
+        from werkzeug.serving import run_simple
+        run_simple('localhost', 4000, application)
+
+
+Links
+-----
+
+-   Website: https://palletsprojects.com/p/werkzeug/
+-   Documentation: https://werkzeug.palletsprojects.com/
+-   Releases: https://pypi.org/project/Werkzeug/
+-   Code: https://github.com/pallets/werkzeug
+-   Issue tracker: https://github.com/pallets/werkzeug/issues
+-   Test status: https://dev.azure.com/pallets/werkzeug/_build
+-   Official chat: https://discord.gg/t6rrQZH
+
+.. _WSGI: https://wsgi.readthedocs.io/en/latest/
+.. _Flask: https://www.palletsprojects.com/p/flask/
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/RECORD
new file mode 100644
index 0000000..1b8ceae
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/RECORD
@@ -0,0 +1,101 @@
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+Werkzeug-1.0.1.dist-info/LICENSE.rst,sha256=O0nc7kEF6ze6wQ-vG-JgQI_oXSUrjp3y4JefweCUQ3s,1475
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+werkzeug/__init__.py,sha256=rb-yPiXOjTLbtDOl5fQp5hN7oBdaoXAoQ-slAAvfZAo,502
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+werkzeug/__pycache__/exceptions.cpython-38.pyc,,
+werkzeug/__pycache__/filesystem.cpython-38.pyc,,
+werkzeug/__pycache__/formparser.cpython-38.pyc,,
+werkzeug/__pycache__/http.cpython-38.pyc,,
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diff --git a/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/WHEEL
new file mode 100644
index 0000000..ef99c6c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/top_level.txt
new file mode 100644
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+++ b/python3-vckonline/lib/python3.8/site-packages/Werkzeug-1.0.1.dist-info/top_level.txt
@@ -0,0 +1 @@
+werkzeug
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diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/DESCRIPTION.rst b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/DESCRIPTION.rst
new file mode 100644
index 0000000..5be2b5a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/DESCRIPTION.rst
@@ -0,0 +1,138 @@
+aiofiles: file support for asyncio
+==================================
+
+.. image:: https://img.shields.io/pypi/v/aiofiles.svg
+        :target: https://pypi.python.org/pypi/aiofiles
+
+.. image:: https://travis-ci.org/Tinche/aiofiles.svg?branch=master
+        :target: https://travis-ci.org/Tinche/aiofiles
+
+.. image:: https://codecov.io/gh/Tinche/aiofiles/branch/master/graph/badge.svg
+        :target: https://codecov.io/gh/Tinche/aiofiles
+
+**aiofiles** is an Apache2 licensed library, written in Python, for handling local
+disk files in asyncio applications.
+
+Ordinary local file IO is blocking, and cannot easily and portably made
+asynchronous. This means doing file IO may interfere with asyncio applications,
+which shouldn't block the executing thread. aiofiles helps with this by
+introducing asynchronous versions of files that support delegating operations to
+a separate thread pool.
+
+.. code-block:: python
+
+    async with aiofiles.open('filename', mode='r') as f:
+        contents = await f.read()
+    print(contents)
+    'My file contents'
+
+Asynchronous iteration is also supported.
+
+.. code-block:: python
+
+    async with aiofiles.open('filename') as f:
+        async for line in f:
+            ...
+
+Features
+--------
+
+- a file API very similar to Python's standard, blocking API
+- support for buffered and unbuffered binary files, and buffered text files
+- support for ``async``/``await`` (:PEP:`492`) constructs
+
+
+Installation
+------------
+
+To install aiofiles, simply:
+
+.. code-block:: bash
+
+    $ pip install aiofiles
+
+Usage
+-----
+
+Files are opened using the ``aiofiles.open()`` coroutine, which in addition to
+mirroring the builtin ``open`` accepts optional ``loop`` and ``executor``
+arguments. If ``loop`` is absent, the default loop will be used, as per the
+set asyncio policy. If ``executor`` is not specified, the default event loop
+executor will be used.
+
+In case of success, an asynchronous file object is returned with an
+API identical to an ordinary file, except the following methods are coroutines
+and delegate to an executor:
+
+* ``close``
+* ``flush``
+* ``isatty``
+* ``read``
+* ``readall``
+* ``read1``
+* ``readinto``
+* ``readline``
+* ``readlines``
+* ``seek``
+* ``seekable``
+* ``tell``
+* ``truncate``
+* ``writable``
+* ``write``
+* ``writelines``
+
+In case of failure, one of the usual exceptions will be raised.
+
+The ``aiofiles.os`` module contains executor-enabled coroutine versions of
+several useful ``os`` functions that deal with files:
+
+* ``stat``
+* ``sendfile``
+
+Writing tests for aiofiles
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Real file IO can be mocked by patching ``aiofiles.threadpool.sync_open``
+as desired. The return type also needs to be registered with the
+``aiofiles.threadpool.wrap`` dispatcher:
+
+.. code-block:: python
+
+    aiofiles.threadpool.wrap.register(mock.MagicMock)(
+        lambda *args, **kwargs: threadpool.AsyncBufferedIOBase(*args, **kwargs))
+
+    async def test_stuff():
+        data = 'data'
+        mock_file = mock.MagicMock()
+
+        with mock.patch('aiofiles.threadpool.sync_open', return_value=mock_file) as mock_open:
+            async with aiofiles.open('filename', 'w') as f:
+                await f.write(data)
+
+            mock_file.write.assert_called_once_with(data)
+
+History
+~~~~~~~
+
+0.4.0 (2018-08-11)
+``````````````````
+- Python 3.7 support.
+- Removed Python 3.3/3.4 support. If you use these versions, stick to aiofiles 0.3.x.
+
+0.3.2 (2017-09-23)
+``````````````````
+- The LICENSE is now included in the sdist.
+  `#31 <https://github.com/Tinche/aiofiles/pull/31>`_
+
+0.3.1 (2017-03-10)
+``````````````````
+
+- Introduced a changelog.
+- ``aiofiles.os.sendfile`` will now work if the standard ``os`` module contains a ``sendfile`` function.
+
+Contributing
+~~~~~~~~~~~~
+Contributions are very welcome. Tests can be run with ``tox``, please ensure
+the coverage at least stays the same before you submit a pull request.
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/METADATA
new file mode 100644
index 0000000..2e1c2f6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/METADATA
@@ -0,0 +1,155 @@
+Metadata-Version: 2.0
+Name: aiofiles
+Version: 0.4.0
+Summary: File support for asyncio.
+Home-page: https://github.com/Tinche/aiofiles
+Author: Tin Tvrtkovic
+Author-email: tinchester@gmail.com
+License: Apache 2.0
+Platform: UNKNOWN
+Classifier: Development Status :: 4 - Beta
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: Apache Software License
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Topic :: System :: Filesystems
+
+aiofiles: file support for asyncio
+==================================
+
+.. image:: https://img.shields.io/pypi/v/aiofiles.svg
+        :target: https://pypi.python.org/pypi/aiofiles
+
+.. image:: https://travis-ci.org/Tinche/aiofiles.svg?branch=master
+        :target: https://travis-ci.org/Tinche/aiofiles
+
+.. image:: https://codecov.io/gh/Tinche/aiofiles/branch/master/graph/badge.svg
+        :target: https://codecov.io/gh/Tinche/aiofiles
+
+**aiofiles** is an Apache2 licensed library, written in Python, for handling local
+disk files in asyncio applications.
+
+Ordinary local file IO is blocking, and cannot easily and portably made
+asynchronous. This means doing file IO may interfere with asyncio applications,
+which shouldn't block the executing thread. aiofiles helps with this by
+introducing asynchronous versions of files that support delegating operations to
+a separate thread pool.
+
+.. code-block:: python
+
+    async with aiofiles.open('filename', mode='r') as f:
+        contents = await f.read()
+    print(contents)
+    'My file contents'
+
+Asynchronous iteration is also supported.
+
+.. code-block:: python
+
+    async with aiofiles.open('filename') as f:
+        async for line in f:
+            ...
+
+Features
+--------
+
+- a file API very similar to Python's standard, blocking API
+- support for buffered and unbuffered binary files, and buffered text files
+- support for ``async``/``await`` (:PEP:`492`) constructs
+
+
+Installation
+------------
+
+To install aiofiles, simply:
+
+.. code-block:: bash
+
+    $ pip install aiofiles
+
+Usage
+-----
+
+Files are opened using the ``aiofiles.open()`` coroutine, which in addition to
+mirroring the builtin ``open`` accepts optional ``loop`` and ``executor``
+arguments. If ``loop`` is absent, the default loop will be used, as per the
+set asyncio policy. If ``executor`` is not specified, the default event loop
+executor will be used.
+
+In case of success, an asynchronous file object is returned with an
+API identical to an ordinary file, except the following methods are coroutines
+and delegate to an executor:
+
+* ``close``
+* ``flush``
+* ``isatty``
+* ``read``
+* ``readall``
+* ``read1``
+* ``readinto``
+* ``readline``
+* ``readlines``
+* ``seek``
+* ``seekable``
+* ``tell``
+* ``truncate``
+* ``writable``
+* ``write``
+* ``writelines``
+
+In case of failure, one of the usual exceptions will be raised.
+
+The ``aiofiles.os`` module contains executor-enabled coroutine versions of
+several useful ``os`` functions that deal with files:
+
+* ``stat``
+* ``sendfile``
+
+Writing tests for aiofiles
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Real file IO can be mocked by patching ``aiofiles.threadpool.sync_open``
+as desired. The return type also needs to be registered with the
+``aiofiles.threadpool.wrap`` dispatcher:
+
+.. code-block:: python
+
+    aiofiles.threadpool.wrap.register(mock.MagicMock)(
+        lambda *args, **kwargs: threadpool.AsyncBufferedIOBase(*args, **kwargs))
+
+    async def test_stuff():
+        data = 'data'
+        mock_file = mock.MagicMock()
+
+        with mock.patch('aiofiles.threadpool.sync_open', return_value=mock_file) as mock_open:
+            async with aiofiles.open('filename', 'w') as f:
+                await f.write(data)
+
+            mock_file.write.assert_called_once_with(data)
+
+History
+~~~~~~~
+
+0.4.0 (2018-08-11)
+``````````````````
+- Python 3.7 support.
+- Removed Python 3.3/3.4 support. If you use these versions, stick to aiofiles 0.3.x.
+
+0.3.2 (2017-09-23)
+``````````````````
+- The LICENSE is now included in the sdist.
+  `#31 <https://github.com/Tinche/aiofiles/pull/31>`_
+
+0.3.1 (2017-03-10)
+``````````````````
+
+- Introduced a changelog.
+- ``aiofiles.os.sendfile`` will now work if the standard ``os`` module contains a ``sendfile`` function.
+
+Contributing
+~~~~~~~~~~~~
+Contributions are very welcome. Tests can be run with ``tox``, please ensure
+the coverage at least stays the same before you submit a pull request.
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/RECORD
new file mode 100644
index 0000000..e42f567
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/RECORD
@@ -0,0 +1,23 @@
+aiofiles-0.4.0.dist-info/DESCRIPTION.rst,sha256=H1Vj_rqfRMCdJcU1lW_sPSIWr185N97Kn594gYK_B1A,3873
+aiofiles-0.4.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+aiofiles-0.4.0.dist-info/METADATA,sha256=RqoqpyBnW1j0u1t3w9jQ_F-0vZWsepXvs0MA-GFoMsM,4445
+aiofiles-0.4.0.dist-info/RECORD,,
+aiofiles-0.4.0.dist-info/WHEEL,sha256=8Lm45v9gcYRm70DrgFGVe4WsUtUMi1_0Tso1hqPGMjA,92
+aiofiles-0.4.0.dist-info/metadata.json,sha256=0eE-SIzvVCI2-nBAir1RKYLcPpxWa1uzpmAyD9Vye9M,712
+aiofiles-0.4.0.dist-info/top_level.txt,sha256=sskrEAT1Ocyj9qsJIoeIQNAijBFwY2L0nqayXghOSI0,9
+aiofiles/__init__.py,sha256=EqOSYq0u50pdIbUzDXqyeImxnHUmT9AtbRi_PtO5Hyw,123
+aiofiles/__pycache__/__init__.cpython-38.pyc,,
+aiofiles/__pycache__/_compat.cpython-38.pyc,,
+aiofiles/__pycache__/base.cpython-38.pyc,,
+aiofiles/__pycache__/os.cpython-38.pyc,,
+aiofiles/_compat.py,sha256=dk34urK9pKm1iqKNp2jKDWatAbn3Tt18eRn31G9BcAI,205
+aiofiles/base.py,sha256=OFBt0XoRATidR8UeVldUZmul6-jgRNTn6qebAgFoMys,2121
+aiofiles/os.py,sha256=zNYhMoGytKY994XPCqetbC4ScLgmZjJCjQfZNUm2NrU,514
+aiofiles/threadpool/__init__.py,sha256=io-WG10ohdQU6CdPZEV24oBssL_9T6NEf6AEAHA18Ao,2144
+aiofiles/threadpool/__pycache__/__init__.cpython-38.pyc,,
+aiofiles/threadpool/__pycache__/binary.cpython-38.pyc,,
+aiofiles/threadpool/__pycache__/text.cpython-38.pyc,,
+aiofiles/threadpool/__pycache__/utils.cpython-38.pyc,,
+aiofiles/threadpool/binary.py,sha256=Ds7je-noWGqtwBOd21OF7DNV1m9VFt3Z29ynS7hGf-k,1102
+aiofiles/threadpool/text.py,sha256=blq1hfMSQ_kEtDMuRwf-CtHNeOAwdgIOYYVDtFJi8CI,629
+aiofiles/threadpool/utils.py,sha256=8apQJirPwOgUeRUbT2ghDpqmiXaUq_ZJ5eQRklHgz3U,1266
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/WHEEL
new file mode 100644
index 0000000..6261a26
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.30.0)
+Root-Is-Purelib: true
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/metadata.json b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/metadata.json
new file mode 100644
index 0000000..8309a32
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/metadata.json
@@ -0,0 +1 @@
+{"classifiers": ["Development Status :: 4 - Beta", "Intended Audience :: Developers", "License :: OSI Approved :: Apache Software License", "Programming Language :: Python :: 3.5", "Programming Language :: Python :: 3.6", "Programming Language :: Python :: 3.7", "Topic :: System :: Filesystems"], "extensions": {"python.details": {"contacts": [{"email": "tinchester@gmail.com", "name": "Tin Tvrtkovic", "role": "author"}], "document_names": {"description": "DESCRIPTION.rst"}, "project_urls": {"Home": "https://github.com/Tinche/aiofiles"}}}, "generator": "bdist_wheel (0.30.0)", "license": "Apache 2.0", "metadata_version": "2.0", "name": "aiofiles", "summary": "File support for asyncio.", "version": "0.4.0"}
\ No newline at end of file
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/top_level.txt
new file mode 100644
index 0000000..1ce9bba
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles-0.4.0.dist-info/top_level.txt
@@ -0,0 +1 @@
+aiofiles
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/__init__.py b/python3-vckonline/lib/python3.8/site-packages/aiofiles/__init__.py
new file mode 100644
index 0000000..3c4d362
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles/__init__.py
@@ -0,0 +1,6 @@
+"""Utilities for asyncio-friendly file handling."""
+from .threadpool import open
+
+__version__ = "0.4.0"
+
+__all__ = (open,)
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/aiofiles/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/__pycache__/os.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/aiofiles/__pycache__/os.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/_compat.py b/python3-vckonline/lib/python3.8/site-packages/aiofiles/_compat.py
new file mode 100644
index 0000000..2921cc5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles/_compat.py
@@ -0,0 +1,8 @@
+import sys
+
+try:
+    from functools import singledispatch
+except ImportError:                            # pragma: nocover
+    from singledispatch import singledispatch
+
+PY_35 = sys.version_info >= (3, 5)
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/base.py b/python3-vckonline/lib/python3.8/site-packages/aiofiles/base.py
new file mode 100644
index 0000000..72a835e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles/base.py
@@ -0,0 +1,93 @@
+"""Various base classes."""
+import asyncio
+from collections.abc import Coroutine
+
+
+class AsyncBase:
+    def __init__(self, file, loop, executor):
+        self._file = file
+        self._loop = loop
+        self._executor = executor
+
+    def __aiter__(self):
+        """We are our own iterator."""
+        return self
+
+    @asyncio.coroutine
+    def __anext__(self):
+        """Simulate normal file iteration."""
+        line = yield from self.readline()
+        if line:
+            return line
+        else:
+            raise StopAsyncIteration
+
+
+class _ContextManager(Coroutine):
+    __slots__ = ('_coro', '_obj')
+
+    def __init__(self, coro):
+        self._coro = coro
+        self._obj = None
+
+    def send(self, value):
+        return self._coro.send(value)
+
+    def throw(self, typ, val=None, tb=None):
+        if val is None:
+            return self._coro.throw(typ)
+        elif tb is None:
+            return self._coro.throw(typ, val)
+        else:
+            return self._coro.throw(typ, val, tb)
+
+    def close(self):
+        return self._coro.close()
+
+    @property
+    def gi_frame(self):
+        return self._coro.gi_frame
+
+    @property
+    def gi_running(self):
+        return self._coro.gi_running
+
+    @property
+    def gi_code(self):
+        return self._coro.gi_code
+
+    def __next__(self):
+        return self.send(None)
+
+    @asyncio.coroutine
+    def __iter__(self):
+        resp = yield from self._coro
+        return resp
+
+    def __await__(self):
+        resp = yield from self._coro
+        return resp
+
+    @asyncio.coroutine
+    def __anext__(self):
+        resp = yield from self._coro
+        return resp
+
+    @asyncio.coroutine
+    def __aenter__(self):
+        self._obj = yield from self._coro
+        return self._obj
+
+    @asyncio.coroutine
+    def __aexit__(self, exc_type, exc, tb):
+        self._obj.close()
+        self._obj = None
+
+
+class AiofilesContextManager(_ContextManager):
+    """An adjusted async context manager for aiofiles."""
+
+    @asyncio.coroutine
+    def __aexit__(self, exc_type, exc_val, exc_tb):
+        yield from self._obj.close()
+        self._obj = None
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/os.py b/python3-vckonline/lib/python3.8/site-packages/aiofiles/os.py
new file mode 100644
index 0000000..9b5c3ea
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles/os.py
@@ -0,0 +1,22 @@
+"""Async executor versions of file functions from the os module."""
+import asyncio
+from functools import partial, wraps
+import os
+
+
+def wrap(func):
+    @asyncio.coroutine
+    @wraps(func)
+    def run(*args, loop=None, executor=None, **kwargs):
+        if loop is None:
+            loop = asyncio.get_event_loop()
+        pfunc = partial(func, *args, **kwargs)
+        return loop.run_in_executor(executor, pfunc)
+
+    return run
+
+
+stat = wrap(os.stat)
+
+if hasattr(os, "sendfile"):
+    sendfile = wrap(os.sendfile)
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/__init__.py b/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/__init__.py
new file mode 100644
index 0000000..a8ea978
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/__init__.py
@@ -0,0 +1,63 @@
+"""Handle files using a thread pool executor."""
+import asyncio
+
+from io import (FileIO, TextIOBase, BufferedReader, BufferedWriter,
+                BufferedRandom)
+from functools import partial, singledispatch
+
+from .binary import AsyncBufferedIOBase, AsyncBufferedReader, AsyncFileIO
+from .text import AsyncTextIOWrapper
+from ..base import AiofilesContextManager
+
+sync_open = open
+
+__all__ = ('open', )
+
+
+def open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None,
+         closefd=True, opener=None, *, loop=None, executor=None):
+    return AiofilesContextManager(_open(file, mode=mode, buffering=buffering,
+                                        encoding=encoding, errors=errors,
+                                        newline=newline, closefd=closefd,
+                                        opener=opener, loop=loop,
+                                        executor=executor))
+
+
+@asyncio.coroutine
+def _open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None,
+          closefd=True, opener=None, *, loop=None, executor=None):
+    """Open an asyncio file."""
+    if loop is None:
+        loop = asyncio.get_event_loop()
+    cb = partial(sync_open, file, mode=mode, buffering=buffering,
+                 encoding=encoding, errors=errors, newline=newline,
+                 closefd=closefd, opener=opener)
+    f = yield from loop.run_in_executor(executor, cb)
+
+    return wrap(f, loop=loop, executor=executor)
+
+
+@singledispatch
+def wrap(file, *, loop=None, executor=None):
+    raise TypeError('Unsupported io type: {}.'.format(file))
+
+
+@wrap.register(TextIOBase)
+def _(file, *, loop=None, executor=None):
+    return AsyncTextIOWrapper(file, loop=loop, executor=executor)
+
+
+@wrap.register(BufferedWriter)
+def _(file, *, loop=None, executor=None):
+    return AsyncBufferedIOBase(file, loop=loop, executor=executor)
+
+
+@wrap.register(BufferedReader)
+@wrap.register(BufferedRandom)
+def _(file, *, loop=None, executor=None):
+    return AsyncBufferedReader(file, loop=loop, executor=executor)
+
+
+@wrap.register(FileIO)
+def _(file, *, loop=None, executor=None):
+    return AsyncFileIO(file, loop, executor)
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/binary.py b/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/binary.py
new file mode 100644
index 0000000..288b54b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/binary.py
@@ -0,0 +1,26 @@
+from ..base import AsyncBase
+from .utils import (delegate_to_executor, proxy_property_directly,
+                    proxy_method_directly)
+
+
+@delegate_to_executor('close', 'flush', 'isatty', 'read', 'read1', 'readinto',
+                      'readline', 'readlines', 'seek', 'seekable', 'tell',
+                      'truncate', 'writable', 'write', 'writelines')
+@proxy_method_directly('detach', 'fileno', 'readable')
+@proxy_property_directly('closed', 'raw')
+class AsyncBufferedIOBase(AsyncBase):
+    """The asyncio executor version of io.BufferedWriter."""
+
+
+@delegate_to_executor('peek')
+class AsyncBufferedReader(AsyncBufferedIOBase):
+    """The asyncio executor version of io.BufferedReader and Random."""
+
+
+@delegate_to_executor('close', 'flush', 'isatty', 'read', 'readall', 'readinto',
+                      'readline', 'readlines', 'seek', 'seekable', 'tell',
+                      'truncate', 'writable', 'write', 'writelines')
+@proxy_method_directly('fileno', 'readable')
+@proxy_property_directly('closed')
+class AsyncFileIO(AsyncBase):
+    """The asyncio executor version of io.FileIO."""
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/text.py b/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/text.py
new file mode 100644
index 0000000..7668c0a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/text.py
@@ -0,0 +1,13 @@
+from .utils import (delegate_to_executor, proxy_property_directly,
+                    proxy_method_directly)
+from ..base import AsyncBase
+
+
+@delegate_to_executor('close', 'flush', 'isatty', 'read', 'readable',
+                      'readline', 'readlines', 'seek', 'seekable', 'tell',
+                      'truncate', 'write', 'writable', 'writelines')
+@proxy_method_directly('detach', 'fileno', 'readable')
+@proxy_property_directly('buffer', 'closed', 'encoding', 'errors',
+                         'line_buffering', 'newlines')
+class AsyncTextIOWrapper(AsyncBase):
+    """The asyncio executor version of io.TextIOWrapper."""
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/utils.py b/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/utils.py
new file mode 100644
index 0000000..368b44b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiofiles/threadpool/utils.py
@@ -0,0 +1,49 @@
+import asyncio
+import functools
+
+
+def delegate_to_executor(*attrs):
+    def cls_builder(cls):
+        for attr_name in attrs:
+            setattr(cls, attr_name, _make_delegate_method(attr_name))
+        return cls
+    return cls_builder
+
+
+def proxy_method_directly(*attrs):
+    def cls_builder(cls):
+        for attr_name in attrs:
+            setattr(cls, attr_name, _make_proxy_method(attr_name))
+        return cls
+
+    return cls_builder
+
+
+def proxy_property_directly(*attrs):
+    def cls_builder(cls):
+        for attr_name in attrs:
+            setattr(cls, attr_name, _make_proxy_property(attr_name))
+        return cls
+
+    return cls_builder
+
+
+def _make_delegate_method(attr_name):
+    @asyncio.coroutine
+    def method(self, *args, **kwargs):
+        cb = functools.partial(getattr(self._file, attr_name),
+                               *args, **kwargs)
+        return (yield from self._loop.run_in_executor(self._executor, cb))
+    return method
+
+
+def _make_proxy_method(attr_name):
+    def method(self, *args, **kwargs):
+        return getattr(self._file, attr_name)(*args, **kwargs)
+    return method
+
+
+def _make_proxy_property(attr_name):
+    def proxy_property(self):
+        return getattr(self._file, attr_name)
+    return property(proxy_property)
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/PKG-INFO b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/PKG-INFO
new file mode 100644
index 0000000..99f155b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/PKG-INFO
@@ -0,0 +1,624 @@
+Metadata-Version: 2.1
+Name: aiologger
+Version: 0.6.0
+Summary: Asynchronous logging for python and asyncio
+Home-page: https://github.com/b2wdigital/aiologger
+Author: Diogo Magalhães Martins
+Author-email: magalhaesmartins@icloud.com
+License: MIT
+Project-URL: Documentation, https://aiologger.readthedocs.io/en/latest/
+Project-URL: Code, https://github.com/b2wdigital/aiologger
+Project-URL: Issue tracker, https://github.com/b2wdigital/aiologger/issues
+Description: # aiologger
+        
+        [![PYPI](https://img.shields.io/pypi/v/aiologger.svg)](http://pypi.python.org/pypi/aiologger)
+        [![PYPI Python Versions](https://img.shields.io/pypi/pyversions/aiologger.svg)](http://pypi.python.org/pypi/aiologger)
+        [![Build Status](https://travis-ci.org/B2W-BIT/aiologger.svg?branch=master)](https://travis-ci.org/B2W-BIT/aiologger)
+        [![codecov](https://codecov.io/gh/B2W-BIT/aiologger/branch/master/graph/badge.svg)](https://codecov.io/gh/B2W-BIT/aiologger)
+        
+        
+        # About the Project
+        
+        The builtin python logger is I/O blocking. This means that using the builtin
+        `logging` module will interfere with your asynchronouns application performance.
+        `aiologger` aims to be the standard Asynchronous non blocking logging for
+        python and asyncio.
+        
+        # A word about async, Python and files
+        
+        Tldr; `aiologger` is only fully async when logging to stdout/stderr. If you log into files on disk you are not being fully async and will be using Threads.
+        
+        `aiologger` was created when we realized that there were no async logging libs to use. At the time, Python's built-in logging infra-structure was fully sync (still is, 3.8 beta is out). That's why we created aiologger.
+        
+        Despite everything (in Linux) being a file descriptor, a Network file descriptor and the stdout/stderr FDs are treated differently from files on disk FDs. This happens because there's no stable/usable async I/O interface published by the OS to be used by Python (or any other language). That's why **logging to files is NOT truly async**. `aiologger` implementation of file logging uses [aiofiles](https://github.com/Tinche/aiofiles), which uses a Thread Pool to write the data. Keep this in mind when using `aiologger` for file logging.
+        
+        Other than that, we hope `aiologger` helps you write fully async apps. :tada: :tada:
+        
+        
+        # Installation
+        
+        ```
+        pip install aiologger
+        ```
+        
+        # Testing
+        
+        ```
+        pipenv install --dev
+        pipenv run test
+        ```
+        
+        # Implemented interfaces
+        
+        aiologger implements two different interfaces that you can use to generate your logs.
+        You can generate your logs using the `async/await` syntax or, if you for any reason can't (or don't want to)
+        change all your codebase to use this syntax you can use aiologger as if it were synchronous, but behind the scenes
+        your logs will be generated asynchronously.
+        
+        
+        # Migrating from standard lib logging
+        
+        
+        ## Using aiologger with the standard syntax
+        
+        If you prefer not to use the `async/await` all you need to do is to replace you logger instance with an instance of `aiologger.Logger`.
+        For now on you can call `logger.info()` the same way you are (probably) already calling. Here is a simple example:
+        
+        ```python
+        
+        import asyncio
+        import logging
+        
+        from logging import getLogger
+        
+        
+        async def main():
+            logger = getLogger(__name__)
+            logging.basicConfig(level=logging.DEBUG, format="%(message)s")
+        
+            logger.debug("debug")
+            logger.info("info")
+        
+            logger.warning("warning")
+            logger.error("error")
+            logger.critical("critical")
+        
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        Which will output the following lines:
+        
+        ```
+        debug
+        info
+        warning
+        error
+        critical
+        ```
+        
+        ---
+        
+        If you want to generate all your logs asynchronously, you just have to change the instance of the `logger` object.
+        To do that, all we need to change those lines from:
+        
+        ```python
+        from logging import getLogger
+        
+        logger = getLogger(__name__)
+        ```
+        
+        to:
+        
+        ```python
+        from aiologger import Logger
+        
+        logger = Logger.with_default_handlers()
+        ```
+        
+        and here is the complete example, generating all log lines asynchronously.
+        
+        ```python
+        import asyncio
+        from aiologger import Logger
+        
+        
+        async def main():
+            logger = Logger.with_default_handlers(name='my-logger')
+        
+            logger.debug("debug")
+            logger.info("info")
+        
+            logger.warning("warning")
+            logger.error("error")
+            logger.critical("critical")
+        
+            await logger.shutdown()
+        
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        This code will output the following lines:
+        
+        ```
+        warning
+        debug
+        info
+        error
+        critical
+        ```
+        
+        As you might have noticed, the output order **IS NOT GUARANTEED**.
+        If some kind of order is important to you, you'll need to use the `await` syntax.
+        But thinking about an asyncio application, where every I/O operation is asynchronous,
+        this shouldn't really matter.
+        
+        Also note that logger calls may only be made from an `async def` or from a
+        function called with an `async def` somewhere in the callstack.
+        
+        ## Using aiologger with the async/await syntax
+        
+        
+        ```python
+        import asyncio
+        from aiologger import Logger
+        
+        
+        async def main():
+            logger = Logger.with_default_handlers(name='my-logger')
+        
+            await logger.debug("debug at stdout")
+            await logger.info("info at stdout")
+        
+            await logger.warning("warning at stderr")
+            await logger.error("error at stderr")
+            await logger.critical("critical at stderr")
+        
+            await logger.shutdown()
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        The most basic use case is to log the output into `stdout` and `stderr`.
+        Using `Logger.with_default_handlers` you're able to effortlessly create a new
+        `Logger` instance with 2 distinct handlers:
+        * One for handling `debug` and `info` methods and writing to `stdout`;
+        * The other, for handling `warning`, `critical`, `exception` and `error` methods and writing to `stderr`.
+        
+        Since everything is asynchronous, this means that for the same handler,
+        the output order is guaranteed, but not between distinct handlers.
+        The above code may output the following:
+        
+        ```
+        warning at stderr
+        debug at stdout
+        error at stderr
+        info at stdout
+        critical at stderr
+        ```
+        
+        You may notice that the order between the same handler is guaranteed. E.g.:
+        * `debug at stdout` was outputted before `info at stdout`
+        * `warning at stderr` was outputted before `error at stderr`
+        * between lines of distinct handlers, the order isn't guaranteed.
+        `warning at stderr` was outputted before `debug at stdout`
+        
+        ## Lazy initialization
+        
+        Since the actual stream initialization only happens on the first log call, it's
+        possible to initialize `aiologger.Logger` instances outside a running event
+        loop:
+        
+        
+        ```python
+        
+        import asyncio
+        from aiologger import Logger
+        
+        
+        logger = Logger.with_default_handlers(name='my-logger')
+        
+        
+        async def main():
+        
+            await logger.debug("debug at stdout")
+            await logger.info("info at stdout")
+        
+            await logger.warning("warning at stderr")
+            await logger.error("error at stderr")
+            await logger.critical("critical at stderr")
+        
+            await logger.shutdown()
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        # Loggers
+        
+        ## JsonLogger
+        
+        A simple, featureful, drop-in replacement to the default `aiologger.Logger`
+        that grants to always log valid, single line, JSON output.
+        
+        ### It logs everything
+        
+        ```python
+        import asyncio
+        from datetime import datetime
+        
+        from aiologger.loggers.json import JsonLogger
+        
+        
+        async def main():
+            logger = JsonLogger.with_default_handlers()
+            await logger.info("Im a string")
+            # {"logged_at": "2018-06-14T09:34:56.482817", "line_number": 9, "function": "main", "level": "INFO", "file_path": "/Users/diogo.mmartins/Library/Preferences/PyCharm2018.1/scratches/scratch_47.py", "msg": "Im a string"}
+        
+            await logger.info({
+                'date_objects': datetime.now(),
+                'exceptions': KeyError("Boooom"),
+                'types': JsonLogger
+            })
+            # {"logged_at": "2018-06-14T09:34:56.483000", "line_number": 13, "function": "main", "level": "INFO", "file_path": "/Users/diogo.mmartins/Library/Preferences/PyCharm2018.1/scratches/scratch_47.py", "msg": {"date_objects": "2018-06-14T09:34:56.482953", "exceptions": "Exception: KeyError('Boooom',)", "types": "<JsonLogger aiologger-json (DEBUG)>"}}
+        
+            await logger.shutdown()
+        
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        ### JsonLogger Options
+        
+        `Callable[[], str]` log values may also be used to generate dynamic content that
+        are evaluated at serialization time. All you need to do is wrap the callable
+        using `CallableWrapper`:
+        
+        ```python
+        import asyncio
+        import logging
+        from random import randint
+        
+        from aiologger.loggers.json import JsonLogger
+        from aiologger.utils import CallableWrapper
+        
+        
+        def rand():
+            return randint(1, 100)
+        
+        
+        logger = JsonLogger.with_default_handlers(level=logging.DEBUG)
+        
+        
+        async def main():
+        
+            await logger.info(CallableWrapper(rand))
+            # {"logged_at": "2018-06-14T09:37:52.624123", "line_number": 15, "function": "main", "level": "INFO", "file_path": "/Users/diogo.mmartins/Library/Preferences/PyCharm2018.1/scratches/scratch_47.py", "msg": 70}
+        
+            await logger.info({"Xablau": CallableWrapper(rand)})
+            # {"logged_at": "2018-06-14T09:37:52.624305", "line_number": 18, "function": "main", "level": "INFO", "file_path": "/Users/diogo.mmartins/Library/Preferences/PyCharm2018.1/scratches/scratch_47.py", "msg": {"Xablau": 29}}
+        
+            await logger.shutdown()
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        ###  Adding content to root
+        
+        By default, everything passed to the log methods is inserted inside
+        the `msg` root attribute, but sometimes we want to add content to the root level.
+        
+        #### Flatten
+        
+        This behavior may be achieved using `flatten`. Which is
+        available both as a method parameter and instance attribute.
+        
+        As an instance attribute, every call to a log method would "flat" the dict attributes.
+        
+        ```python
+        import asyncio
+        import logging
+        from aiologger.loggers.json import JsonLogger
+        
+        
+        async def main():
+            logger = JsonLogger.with_default_handlers(level=logging.DEBUG, flatten=True)
+        
+            await logger.info({"status_code": 200, "response_time": 0.00534534})
+            # {"status_code": 200, "response_time": 0.534534, "logged_at": "2017-08-11T16:18:58.446985", "line_number": 6, "function": "<module>", "level": "INFO", "path": "/Users/diogo/PycharmProjects/aiologger/bla.py"}
+        
+            await logger.error({"status_code": 404, "response_time": 0.00134534})
+            # {"status_code": 200, "response_time": 0.534534, "logged_at": "2017-08-11T16:18:58.446986", "line_number": 6, "function": "<module>", "level": "INFO", "path": "/Users/diogo/PycharmProjects/aiologger/bla.py"}
+        
+            await logger.shutdown()
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        As a method parameter, only the specific call would add the content to the root.
+        
+        ```python
+        import asyncio
+        import logging
+        from aiologger.loggers.json import JsonLogger
+        
+        
+        async def main():
+            logger = await JsonLogger.with_default_handlers(level=logging.DEBUG)
+        
+            await logger.info({"status_code": 200, "response_time": 0.00534534}, flatten=True)
+            # {"logged_at": "2017-08-11T16:23:16.312441", "line_number": 6, "function": "<module>", "level": "INFO", "path": "/Users/diogo/PycharmProjects/aiologger/bla.py", "status_code": 200, "response_time": 0.00534534}
+        
+            await logger.error({"status_code": 404, "response_time": 0.00134534})
+            # {"logged_at": "2017-08-11T16:23:16.312618", "line_number": 8, "function": "<module>", "level": "ERROR", "path": "/Users/diogo/PycharmProjects/aiologger/bla.py", "msg": {"status_code": 404, "response_time": 0.00134534}}
+        
+            await logger.shutdown()
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        **Warning**: It is possible to overwrite keys that are already present at root level.
+        
+        ```python
+        import asyncio
+        import logging
+        from aiologger.loggers.json import JsonLogger
+        
+        
+        async def main():
+            logger = JsonLogger.with_default_handlers(level=logging.DEBUG)
+        
+            await logger.info({'logged_at': 'Yesterday'}, flatten=True)
+            # {"logged_at": "Yesterday", "line_number": 6, "function": "<module>", "level": "INFO", "path": "/Users/diogo/PycharmProjects/aiologger/bla.py"}
+        
+            await logger.shutdown()
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        #### Extra
+        
+        The `extra` parameter allow you to add specific content to root:
+        
+        
+        ```python
+        import asyncio
+        import logging
+        from aiologger.loggers.json import JsonLogger
+        
+        
+        async def main():
+            a = 69
+            b = 666
+            c = [a, b]
+            logger = JsonLogger.with_default_handlers(level=logging.DEBUG)
+        
+            await logger.info("I'm a simple log")
+            # {"msg": "I'm a simple log", "logged_at": "2017-08-11T12:21:05.722216", "line_number": 5, "function": "<module>", "level": "INFO", "path": "/Users/diogo/PycharmProjects/aiologger/bla.py"}
+        
+            await logger.info({"dog": "Xablau"}, extra=locals())
+            # {"logged_at": "2018-06-14T09:47:29.477705", "line_number": 14, "function": "main", "level": "INFO", "file_path": "/Users/diogo.mmartins/Library/Preferences/PyCharm2018.1/scratches/scratch_47.py", "msg": {"dog": "Xablau"}, "logger": "<JsonLogger aiologger-json (DEBUG)>", "c": [69, 666], "b": 666, "a": 69}
+        
+            await logger.shutdown()
+        
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        It also allows you to override the default root content:
+        
+        ```python
+        import asyncio
+        import logging
+        from aiologger.loggers.json import JsonLogger
+        
+        
+        async def main():
+            logger = JsonLogger.with_default_handlers(level=logging.DEBUG)
+        
+            await logger.info("I'm a simple log")
+            # {"msg": "I'm a simple log", "logged_at": "2017-08-11T12:21:05.722216", "line_number": 6, "function": "<module>", "level": "INFO", "path": "/Users/diogo/PycharmProjects/aiologger/bla.py"}
+        
+            await logger.info("I'm a simple log", extra={'logged_at': 'Yesterday'})
+            # {"msg": "I'm a simple log", "logged_at": "Yesterday", "line_number": 6, "function": "<module>", "level": "INFO", "path": "/Users/diogo/PycharmProjects/aiologger/bla.py"}
+        
+            await logger.shutdown()
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        and it may also be used as an instance attribute:
+        
+        ```python
+        import asyncio
+        import logging
+        from aiologger.loggers.json import JsonLogger
+        
+        
+        async def main():
+            logger = JsonLogger.with_default_handlers(level=logging.DEBUG, extra={'logged_at': 'Yesterday'})
+        
+            await logger.info("I'm a simple log")
+            # {"msg": "I'm a simple log", "logged_at": "Yesterday", "line_number": 6, "function": "<module>", "level": "INFO", "path": "/Users/diogo/PycharmProjects/aiologger/bla.py"}
+        
+            await logger.info("I'm a simple log")
+            # {"msg": "I'm a simple log", "logged_at": "Yesterday", "line_number": 6, "function": "<module>", "level": "INFO", "path": "/Users/diogo/PycharmProjects/aiologger/bla.py"}
+        
+            await logger.shutdown()
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        
+        #### Exclude default logger fields
+        
+        If you think that the default fields are too much, it's also possible to
+        exclude fields from the output message.
+        
+        ```python
+        import asyncio
+        import logging
+        from aiologger.loggers.json import JsonLogger
+        from aiologger.formatters.json import FUNCTION_NAME_FIELDNAME, LOGGED_AT_FIELDNAME
+        
+        
+        async def main():
+            logger = JsonLogger.with_default_handlers(
+                level=logging.DEBUG,
+                exclude_fields=[FUNCTION_NAME_FIELDNAME,
+                                LOGGED_AT_FIELDNAME,
+                                'file_path',
+                                'line_number']
+            )
+        
+            await logger.info("Function, file path and line number wont be printed")
+            # {"level": "INFO", "msg": "Function, file path and line number wont be printed"}
+        
+            await logger.shutdown()
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        ### Serializer options
+        
+        `serializer_kwargs` is available both as instance attribute and as
+        a log method parameter and may be used to pass keyword arguments to the
+        `serializer` function. (See more: https://docs.python.org/3/library/json.html)
+        
+        For pretty printing the output, you may use the `indent` kwarg. Ex.:
+        
+        ```python
+        import asyncio
+        import logging
+        from aiologger.loggers.json import JsonLogger
+        
+        
+        async def main():
+            logger = JsonLogger.with_default_handlers(
+                level=logging.DEBUG,
+                serializer_kwargs={'indent': 4}
+            )
+        
+            await logger.info({
+                "artist": "Black Country Communion",
+                "song": "Cold"
+            })
+        
+            await logger.shutdown()
+        
+        if __name__ == "__main__":
+            asyncio.run(main())
+        ```
+        
+        Would result in a pretty indented output:
+        
+        ```javascript
+        {
+            "logged_at": "2017-08-11T21:04:21.559070",
+            "line_number": 5,
+            "function": "<module>",
+            "level": "INFO",
+            "file_path": "/Users/diogo/Library/Preferences/PyCharm2017.1/scratches/scratch_32.py",
+            "msg": {
+                "artist": "Black Country Communion",
+                "song": "Cold"
+            }
+        }
+        ```
+        
+        The same result can be achieved making a log call with `serializer_kwargs`
+        as a parameter.
+        
+        
+        ```python
+        await logger.warning({'artist': 'Black Country Communion', 'song': 'Cold'}, serializer_kwargs={'indent': 4})
+        ```
+        
+        # Handlers
+        
+        ## AsyncStreamHandler
+        
+        A handler class for writing logs into a stream which may be `sys.stdout`
+        or `sys.stderr`. If a stream isn't provided, it defaults to `sys.stderr`. If
+        `level` is not specified, `logging.NOTSET` is used. If `formatter` is not
+        `None`, it is used to format the log record before `emit()` gets called. A
+        `filter` may be used to filter log records
+        
+        
+        ```python
+        import sys
+        from aiologger.handlers.streams import AsyncStreamHandler
+        
+        
+        handler = AsyncStreamHandler(stream=sys.stdout)
+        ```
+        It also accepts a level, formatter and filter at the initialization.
+        
+        ## AsyncFileHandler
+        
+        **Important**: AsyncFileHandler depends on a optional dependency and you should
+        install aiologger with `pip install aiologger[aiofiles]`
+        
+        A handler class that sends logs into files. The specified file is opened
+        and used as the _stream_ for logging. If `mode` is not specified, 'a' is
+        used. If `encoding` is not `None`, it is used to open the file with that
+        encoding. The file opening is delayed until the first call to `emit()`.
+        
+        ```python
+        from aiologger.handlers.files import AsyncFileHandler
+        from tempfile import NamedTemporaryFile
+        
+        
+        temp_file = NamedTemporaryFile()
+        handler = AsyncFileHandler(filename=temp_file.name)
+        ```
+        # Options
+        
+        * `AIOLOGGER_HANDLE_ERROR_FALLBACK_ENABLED` - An environment variable that tells
+        aiologger whether it should emit a log to `stderr` in case of a handler emit
+        raises an exceptions. To disable the default behaviour, set this
+        environment variable to a falsy value `("False", "false", "0")`. Default: `True`
+        
+        # Compatibility
+        
+        The explicit passing of a `loop` keyword argument, and subsequent access of a
+        `.loop` attribute, has been deprecated and will be removed in version 0.7.0 for
+        Loggers and Handlers.
+        
+        Currently tested only on python 3.6 and 3.7
+        
+        # Depencencies
+        
+        Has none.
+        
+Keywords: logging json log output
+Platform: UNKNOWN
+Classifier: Development Status :: 4 - Beta
+Classifier: Framework :: AsyncIO
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Intended Audience :: System Administrators
+Classifier: Intended Audience :: Information Technology
+Classifier: Natural Language :: English
+Classifier: Operating System :: MacOS :: MacOS X
+Classifier: Operating System :: Unix
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Topic :: System :: Logging
+Classifier: Topic :: Software Development :: Libraries
+Requires-Python: >=3.6
+Description-Content-Type: text/markdown
+Provides-Extra: aiofiles
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/SOURCES.txt b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/SOURCES.txt
new file mode 100644
index 0000000..569d77c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/SOURCES.txt
@@ -0,0 +1,25 @@
+README.md
+setup.cfg
+setup.py
+aiologger/__init__.py
+aiologger/filters.py
+aiologger/levels.py
+aiologger/logger.py
+aiologger/protocols.py
+aiologger/records.py
+aiologger/settings.py
+aiologger/utils.py
+aiologger.egg-info/PKG-INFO
+aiologger.egg-info/SOURCES.txt
+aiologger.egg-info/dependency_links.txt
+aiologger.egg-info/requires.txt
+aiologger.egg-info/top_level.txt
+aiologger/formatters/__init__.py
+aiologger/formatters/base.py
+aiologger/formatters/json.py
+aiologger/handlers/__init__.py
+aiologger/handlers/base.py
+aiologger/handlers/files.py
+aiologger/handlers/streams.py
+aiologger/loggers/__init__.py
+aiologger/loggers/json.py
\ No newline at end of file
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/dependency_links.txt b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/dependency_links.txt
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/dependency_links.txt
@@ -0,0 +1 @@
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/installed-files.txt b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/installed-files.txt
new file mode 100644
index 0000000..9a034bb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/installed-files.txt
@@ -0,0 +1,39 @@
+../aiologger/__init__.py
+../aiologger/__pycache__/__init__.cpython-38.pyc
+../aiologger/__pycache__/filters.cpython-38.pyc
+../aiologger/__pycache__/levels.cpython-38.pyc
+../aiologger/__pycache__/logger.cpython-38.pyc
+../aiologger/__pycache__/protocols.cpython-38.pyc
+../aiologger/__pycache__/records.cpython-38.pyc
+../aiologger/__pycache__/settings.cpython-38.pyc
+../aiologger/__pycache__/utils.cpython-38.pyc
+../aiologger/filters.py
+../aiologger/formatters/__init__.py
+../aiologger/formatters/__pycache__/__init__.cpython-38.pyc
+../aiologger/formatters/__pycache__/base.cpython-38.pyc
+../aiologger/formatters/__pycache__/json.cpython-38.pyc
+../aiologger/formatters/base.py
+../aiologger/formatters/json.py
+../aiologger/handlers/__init__.py
+../aiologger/handlers/__pycache__/__init__.cpython-38.pyc
+../aiologger/handlers/__pycache__/base.cpython-38.pyc
+../aiologger/handlers/__pycache__/files.cpython-38.pyc
+../aiologger/handlers/__pycache__/streams.cpython-38.pyc
+../aiologger/handlers/base.py
+../aiologger/handlers/files.py
+../aiologger/handlers/streams.py
+../aiologger/levels.py
+../aiologger/logger.py
+../aiologger/loggers/__init__.py
+../aiologger/loggers/__pycache__/__init__.cpython-38.pyc
+../aiologger/loggers/__pycache__/json.cpython-38.pyc
+../aiologger/loggers/json.py
+../aiologger/protocols.py
+../aiologger/records.py
+../aiologger/settings.py
+../aiologger/utils.py
+PKG-INFO
+SOURCES.txt
+dependency_links.txt
+requires.txt
+top_level.txt
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/requires.txt b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/requires.txt
new file mode 100644
index 0000000..3da3df3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/requires.txt
@@ -0,0 +1,3 @@
+
+[aiofiles]
+aiofiles==0.4.0
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/top_level.txt
new file mode 100644
index 0000000..17328ce
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger-0.6.0-py3.8.egg-info/top_level.txt
@@ -0,0 +1 @@
+aiologger
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/__init__.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/__init__.py
new file mode 100644
index 0000000..92a2f16
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/__init__.py
@@ -0,0 +1 @@
+from .logger import Logger
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diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/filters.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/filters.py
new file mode 100644
index 0000000..6495da4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/filters.py
@@ -0,0 +1,98 @@
+# The following code and documentation was inspired, and in some cases
+# copied and modified, from the work of Vinay Sajip and contributors
+# on cpython's logging package
+from abc import ABC
+from typing import List, Callable, Union
+
+from aiologger.levels import LogLevel
+from aiologger.records import LogRecord
+
+
+class Filter:
+    """
+    Filter instances are used to perform arbitrary filtering of LogRecords.
+
+    Loggers and Handlers can optionally use Filter instances to filter
+    records as desired. The base filter class only allows events which are
+    below a certain point in the logger hierarchy. For example, a filter
+    initialized with "A.B" will allow events logged by loggers "A.B",
+    "A.B.C", "A.B.C.D", "A.B.D" etc. but not "A.BB", "B.A.B" etc. If
+    initialized with the empty string, all events are passed.
+    """
+
+    def __init__(self, name: str = "") -> None:
+        """
+        Initialize a filter.
+
+        Initialize with the name of the logger which, together with its
+        children, will have its events allowed through the filter. If no
+        name is specified, allow every event.
+        """
+        self.name = name
+        self.name_length = len(name)
+
+    def filter(self, record: LogRecord) -> bool:
+        """
+        Determine if the specified record is to be logged.
+        """
+        if self.name_length == 0:
+            return True
+        elif self.name == record.name:
+            return True
+        elif not record.name.startswith(self.name):
+            return False
+        return record.name[self.name_length] == "."
+
+    def __call__(self, record: LogRecord) -> bool:
+        return self.filter(record)
+
+
+_FilterCallable = Callable[[LogRecord], bool]
+
+
+class Filterer(ABC):
+    """
+    A base class for loggers and handlers which allows them to share
+    common code.
+    """
+
+    def __init__(self):
+        """
+        Initialize the list of filters to be an empty list.
+        """
+        self.filters: List[Union[Filter, _FilterCallable]] = []
+
+    def add_filter(self, filter: Filter):
+        """
+        Add the specified filter to this handler.
+        """
+        if not (filter in self.filters):
+            self.filters.append(filter)
+
+    def remove_filter(self, filter: Filter):
+        """
+        Remove the specified filter from this handler.
+        """
+        if filter in self.filters:
+            self.filters.remove(filter)
+
+    def filter(self, record: LogRecord) -> bool:
+        """
+        Determine if a record is loggable by consulting all the filters.
+
+        The default is to allow the record to be logged; any filter can veto
+        this and the record is then dropped. Returns a zero value if a record
+        is to be dropped, else non-zero.
+        """
+        for filter in self.filters:
+            result = filter(record)
+            if not result:
+                return False
+        return True
+
+
+class StdoutFilter(Filter):
+    _levels = (LogLevel.DEBUG, LogLevel.INFO)
+
+    def filter(self, record: LogRecord) -> bool:
+        return record.levelno in self._levels
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/formatters/__init__.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/formatters/__init__.py
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diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/formatters/base.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/formatters/base.py
new file mode 100644
index 0000000..ed2e11a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/formatters/base.py
@@ -0,0 +1,238 @@
+import enum
+import io
+import time
+import traceback
+from string import Template
+from typing import Union, List
+from types import TracebackType
+
+from aiologger.records import LogRecord, ExceptionInfo
+
+
+class FormatStyles(str, enum.Enum):
+    PERCENT = "%"
+    STRING_TEMPLATE = "$"
+    STRING_FORMAT = "{"
+
+
+class PercentStyle:
+    default_format = "%(message)s"
+    asctime_format = "%(asctime)s"
+    asctime_search = "%(asctime)"
+
+    def __init__(self, fmt: str = None) -> None:
+        self._fmt = fmt or self.default_format
+        self.uses_time = self._fmt.find(self.asctime_search) >= 0
+
+    def format(self, record: LogRecord) -> str:
+        return self._fmt % record.__dict__
+
+
+class StrFormatStyle(PercentStyle):
+    default_format = "{message}"
+    asctime_format = "{asctime}"
+    asctime_search = "{asctime"
+
+    def format(self, record: LogRecord) -> str:
+        return self._fmt.format(**record.__dict__)
+
+
+class StringTemplateStyle(PercentStyle):
+    default_format = "${message}"
+    asctime_format = "${asctime}"
+    asctime_search = "${asctime}"
+
+    def __init__(self, fmt: str = None) -> None:
+        self._fmt = fmt or self.default_format
+        self._template = Template(self._fmt)
+        self.uses_time = (
+            self._fmt.find("$asctime") >= 0
+            or self._fmt.find(self.asctime_format) >= 0
+        )
+
+    def format(self, record: LogRecord) -> str:
+        return self._template.substitute(**record.__dict__)
+
+
+BASIC_FORMAT = "%(levelname)s:%(name)s:%(message)s"
+
+_STYLES = {
+    "%": (PercentStyle, BASIC_FORMAT),
+    "{": (StrFormatStyle, "{levelname}:{name}:{message}"),
+    "$": (StringTemplateStyle, "${levelname}:${name}:${message}"),
+}
+
+
+class Formatter:
+    """
+    Formatter instances are used to convert a ExtendedLogRecord to text.
+
+    Formatters need to know how a ExtendedLogRecord is constructed. They are
+    responsible for converting a ExtendedLogRecord to (usually) a string which can
+    be interpreted by either a human or an external system. The base Formatter
+    allows a formatting string to be specified. If none is supplied, the
+    default value of "%s(message)" is used.
+
+    The Formatter can be initialized with a format string which makes use of
+    knowledge of the ExtendedLogRecord attributes - e.g. the default value mentioned
+    above makes use of the fact that the user's message and arguments are pre-
+    formatted into a ExtendedLogRecord's message attribute. Currently, the useful
+    attributes in a ExtendedLogRecord are described by:
+
+    %(name)s            Name of the logger (logging channel)
+    %(levelno)s         Numeric logging level for the message (DEBUG, INFO,
+                        WARNING, ERROR, CRITICAL)
+    %(levelname)s       Text logging level for the message ("DEBUG", "INFO",
+                        "WARNING", "ERROR", "CRITICAL")
+    %(pathname)s        Full pathname of the source file where the logging
+                        call was issued (if available)
+    %(filename)s        Filename portion of pathname
+    %(module)s          Module (name portion of filename)
+    %(lineno)d          Source line number where the logging call was issued
+                        (if available)
+    %(funcName)s        Function name
+    %(created)f         Time when the ExtendedLogRecord was created (time.time()
+                        return value)
+    %(asctime)s         Textual time when the ExtendedLogRecord was created
+    %(msecs)d           Millisecond portion of the creation time
+    %(relativeCreated)d Time in milliseconds when the ExtendedLogRecord was created,
+                        relative to the time the logging module was loaded
+                        (typically at application startup time)
+    %(thread)d          Thread ID (if available)
+    %(threadName)s      Thread name (if available)
+    %(process)d         Process ID (if available)
+    %(message)s         The result of record.get_message(), computed just as
+                        the record is emitted
+    """
+
+    default_time_format = "%Y-%m-%d %H:%M:%S"
+    default_msec_format = "%s,%03d"
+    terminator = "\n"
+
+    def __init__(
+        self,
+        fmt: str = None,
+        datefmt: str = None,
+        style: Union[str, FormatStyles] = "%",
+    ) -> None:
+        """
+        Initialize the formatter with specified format strings.
+
+        Initialize the formatter either with the specified format string, or a
+        default as described above. Allow for specialized date formatting with
+        the optional datefmt argument. If datefmt is omitted, you get an
+        ISO8601-like (or RFC 3339-like) format.
+
+        Use a style parameter of '%', '{' or '$' to specify that you want to
+        use one of %-formatting, :meth:`str.format` (``{}``) formatting or
+        :class:`string.Template` formatting in your format string.
+
+        .. versionchanged:: 3.2
+           Added the ``style`` parameter.
+        """
+        if style not in _STYLES:
+            valid_styles = ",".join(_STYLES.keys())
+            raise ValueError(f"Style must be one of: {valid_styles}")
+
+        self._style = _STYLES[style][0](fmt)
+        self._fmt = self._style._fmt
+        self.datefmt = datefmt
+        self.converter = time.localtime
+
+    def format_time(self, record: LogRecord, datefmt: str = None) -> str:
+        """
+        Return the creation time of the specified ExtendedLogRecord as formatted text.
+
+        This method should be called from format() by a formatter which
+        wants to make use of a formatted time. This method can be overridden
+        in formatters to provide for any specific requirement, but the
+        basic behaviour is as follows: if datefmt (a string) is specified,
+        it is used with time.strftime() to format the creation time of the
+        record. Otherwise, an ISO8601-like (or RFC 3339-like) format is used.
+        The resulting string is returned. This function uses a user-configurable
+        function to convert the creation time to a tuple. By default,
+        time.localtime() is used; to change this for a particular formatter
+        instance, set the 'converter' attribute to a function with the same
+        signature as time.localtime() or time.gmtime(). To change it for all
+        formatters, for example if you want all logging times to be shown in GMT,
+        set the 'converter' attribute in the Formatter class.
+        """
+        ct = self.converter(record.created)
+        if datefmt:
+            return time.strftime(datefmt, ct)
+        else:
+            t = time.strftime(self.default_time_format, ct)
+            return self.default_msec_format % (t, record.msecs)
+
+    def format_exception(self, exception_info: ExceptionInfo) -> str:
+        """
+        Format and return the specified exception information as a string.
+
+        This default implementation just uses
+        traceback.print_exception()
+        """
+        string_io = io.StringIO()
+        tb = exception_info[2]
+
+        traceback.print_exception(
+            exception_info[0], exception_info[1], tb, None, string_io
+        )
+
+        s = string_io.getvalue()
+        string_io.close()
+        if s[-1:] == self.terminator:
+            s = s[:-1]
+        return s
+
+    def format_message(self, record: LogRecord) -> str:
+        return self._style.format(record)
+
+    def format_stack(self, stack_info):
+        """
+        This method is provided as an extension point for specialized
+        formatting of stack information.
+
+        The input data is a string as returned from a call to
+        :func:`traceback.print_stack`, but with the last trailing newline
+        removed.
+
+        The base implementation just returns the value passed in.
+        """
+        return stack_info
+
+    @staticmethod
+    def format_traceback(tb: TracebackType) -> List[str]:
+        formatted_tb = "".join(traceback.format_tb(tb))
+        return formatted_tb.strip().split("\n")
+
+    def format(self, record: LogRecord) -> str:
+        """
+        Format the specified record as text.
+
+        The record's attribute dictionary is used as the operand to a
+        string formatting operation which yields the returned string.
+        Before formatting the dictionary, a couple of preparatory steps
+        are carried out. The message attribute of the record is computed
+        using LogRecord.get_message(). If the formatting string uses the
+        time (as determined by a call to usesTime(), format_time() is
+        called to format the event time. If there is exception information,
+        it is formatted using format_exception() and appended to the message.
+        """
+        record.message = record.get_message()
+        if self._style.uses_time:
+            record.asctime = self.format_time(record, self.datefmt)
+        s = self.format_message(record)
+        if record.exc_info:
+            # Cache the traceback text to avoid converting it multiple times
+            # (it's constant anyway)
+            if not record.exc_text:
+                record.exc_text = self.format_exception(record.exc_info)
+        if record.exc_text:
+            if s[-1:] != self.terminator:
+                s = s + self.terminator
+            s = s + record.exc_text
+        if record.stack_info:
+            if s[-1:] != self.terminator:
+                s = s + self.terminator
+            s = s + self.format_stack(record.stack_info)
+        return s
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/formatters/json.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/formatters/json.py
new file mode 100644
index 0000000..ff24743
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/formatters/json.py
@@ -0,0 +1,155 @@
+import json
+import traceback
+from datetime import datetime
+from inspect import istraceback
+from typing import Callable, Iterable, Union, Dict, Optional, List
+from datetime import timezone
+
+from aiologger.formatters.base import Formatter
+from aiologger.levels import LEVEL_TO_NAME
+from aiologger.records import LogRecord
+from aiologger.utils import CallableWrapper
+
+
+LOGGED_AT_FIELDNAME = "logged_at"
+LINE_NUMBER_FIELDNAME = "line_number"
+FUNCTION_NAME_FIELDNAME = "function"
+LOG_LEVEL_FIELDNAME = "level"
+MSG_FIELDNAME = "msg"
+FILE_PATH_FIELDNAME = "file_path"
+
+
+class JsonFormatter(Formatter):
+    def __init__(
+        self,
+        serializer: Callable[..., str] = json.dumps,
+        default_msg_fieldname: str = None,
+    ) -> None:
+        super(JsonFormatter, self).__init__()
+        self.serializer = serializer
+        self.default_msg_fieldname = default_msg_fieldname or MSG_FIELDNAME
+
+    def _default_handler(self, obj):
+        if isinstance(obj, datetime):
+            return obj.isoformat()
+        elif istraceback(obj):
+            tb = "".join(traceback.format_tb(obj))
+            return tb.strip().split("\n")
+        elif isinstance(obj, Exception):
+            return "Exception: %s" % repr(obj)
+        elif type(obj) is type:
+            return str(obj)
+        elif isinstance(obj, CallableWrapper):
+            return obj()
+        return str(obj)
+
+    def format(self, record: LogRecord) -> str:
+        """
+        Formats a record and serializes it as a JSON str. If record message isnt
+        already a dict, initializes a new dict and uses `default_msg_fieldname`
+        as a key as the record msg as the value.
+        """
+        msg: Union[str, dict] = record.msg
+        if not isinstance(msg, dict):
+            msg = {self.default_msg_fieldname: msg}
+
+        if record.exc_info:
+            msg["exc_info"] = record.exc_info
+        if record.exc_text:
+            msg["exc_text"] = record.exc_text
+
+        return self.serializer(msg, default=self._default_handler)
+
+    @classmethod
+    def format_error_msg(cls, record: LogRecord, exception: Exception) -> Dict:
+        traceback_info: Optional[List[str]]
+        if exception.__traceback__:
+            traceback_info = cls.format_traceback(exception.__traceback__)
+        else:
+            traceback_info = None
+        return {
+            "record": {
+                LINE_NUMBER_FIELDNAME: record.lineno,
+                LOG_LEVEL_FIELDNAME: record.levelname,
+                FILE_PATH_FIELDNAME: record.filename,
+                FUNCTION_NAME_FIELDNAME: record.funcName,
+                MSG_FIELDNAME: str(record.msg),
+            },
+            LOGGED_AT_FIELDNAME: datetime.utcnow().isoformat(),
+            "logger_exception": {
+                "type": str(type(exception)),
+                "exc": str(exception),
+                "traceback": traceback_info,
+            },
+        }
+
+
+class ExtendedJsonFormatter(JsonFormatter):
+    level_to_name_mapping = LEVEL_TO_NAME
+    default_fields = frozenset(
+        [
+            LOG_LEVEL_FIELDNAME,
+            LOGGED_AT_FIELDNAME,
+            LINE_NUMBER_FIELDNAME,
+            FUNCTION_NAME_FIELDNAME,
+            FILE_PATH_FIELDNAME,
+        ]
+    )
+
+    def __init__(
+        self,
+        serializer: Callable[..., str] = json.dumps,
+        default_msg_fieldname: str = None,
+        exclude_fields: Iterable[str] = None,
+        tz: timezone = None,
+    ) -> None:
+
+        super(ExtendedJsonFormatter, self).__init__(
+            serializer=serializer, default_msg_fieldname=default_msg_fieldname
+        )
+        self.tz = tz
+        if exclude_fields is None:
+            self.log_fields = self.default_fields
+        else:
+            self.log_fields = self.default_fields - set(exclude_fields)
+
+    def formatter_fields_for_record(self, record: LogRecord):
+        """
+        :type record: aiologger.records.ExtendedLogRecord
+        """
+        datetime_serialized = (
+            datetime.now(timezone.utc).astimezone(self.tz).isoformat()
+        )
+
+        default_fields = (
+            (LOGGED_AT_FIELDNAME, datetime_serialized),
+            (LINE_NUMBER_FIELDNAME, record.lineno),
+            (FUNCTION_NAME_FIELDNAME, record.funcName),
+            (LOG_LEVEL_FIELDNAME, self.level_to_name_mapping[record.levelno]),
+            (FILE_PATH_FIELDNAME, record.pathname),
+        )
+
+        for field, value in default_fields:
+            if field in self.log_fields:
+                yield field, value
+
+    def format(self, record) -> str:
+        """
+        :type record: aiologger.records.ExtendedLogRecord
+        """
+        msg = dict(self.formatter_fields_for_record(record))
+        if record.flatten and isinstance(record.msg, dict):
+            msg.update(record.msg)
+        else:
+            msg[MSG_FIELDNAME] = record.msg
+
+        if record.extra:
+            msg.update(record.extra)
+        if record.exc_info:
+            msg["exc_info"] = record.exc_info
+        if record.exc_text:
+            msg["exc_text"] = record.exc_text
+
+        return self.serializer(
+            msg, default=self._default_handler, **record.serializer_kwargs
+        )
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diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/handlers/base.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/handlers/base.py
new file mode 100644
index 0000000..e0f4ff9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/handlers/base.py
@@ -0,0 +1,126 @@
+import abc
+import asyncio
+import json
+import sys
+from asyncio import AbstractEventLoop
+from typing import Optional, Union
+
+from aiologger import settings
+from aiologger.utils import loop_compat
+from aiologger.filters import Filterer
+from aiologger.formatters.base import Formatter
+from aiologger.formatters.json import JsonFormatter
+from aiologger.levels import LogLevel, get_level_name, check_level
+from aiologger.records import LogRecord
+
+
+# Handler relies on any formatter
+_default_formatter = Formatter()
+
+
+@loop_compat
+class Handler(Filterer):
+    """
+    Handler instances dispatch logging events to specific destinations.
+
+    The base handler class. Acts as a placeholder which defines the Handler
+    interface. Handlers can optionally use Formatter instances to format
+    records as desired. By default, no formatter is specified; in this case,
+    the 'raw' message as determined by record.message is logged.
+    """
+
+    def __init__(self, level: LogLevel = LogLevel.NOTSET) -> None:
+        """
+        Initializes the instance - basically setting the formatter to None
+        and the filter list to empty.
+        """
+        Filterer.__init__(self)
+        self._level = check_level(level)
+        self.formatter: Formatter = _default_formatter
+
+    @property
+    @abc.abstractmethod
+    def initialized(self):
+        raise NotImplementedError()
+
+    @property
+    def level(self):
+        return self._level
+
+    @level.setter
+    def level(self, value: Union[str, int, LogLevel]):
+        """
+        Set the logging level of this handler.
+        """
+        self._level = check_level(value)
+
+    @abc.abstractmethod
+    async def emit(self, record: LogRecord) -> None:
+        """
+        Do whatever it takes to actually log the specified logging record.
+
+        This version is intended to be implemented by subclasses and so
+        raises a NotImplementedError.
+        """
+        raise NotImplementedError(
+            "emit must be implemented by Handler subclasses"
+        )
+
+    async def handle(self, record: LogRecord) -> bool:
+        """
+        Conditionally emit the specified logging record.
+
+        Emission depends on filters which may have been added to the handler.
+        Returns whether the filter passed the record for emission.
+        """
+        rv = self.filter(record)
+        if rv:
+            await self.emit(record)
+        return rv
+
+    async def flush(self) -> None:
+        """
+        Ensure all logging output has been flushed.
+
+        This version does nothing and is intended to be implemented by
+        subclasses.
+        """
+        pass
+
+    @abc.abstractmethod
+    async def close(self) -> None:
+        """
+        Tidy up any resources used by the handler.
+
+        This version removes the handler from an internal map of handlers,
+        _handlers, which is used for handler lookup by name. Subclasses
+        should ensure that this gets called from overridden close()
+        methods.
+        """
+        raise NotImplementedError(
+            "close must be implemented by Handler subclasses"
+        )
+
+    async def handle_error(
+        self, record: LogRecord, exception: Exception
+    ) -> None:
+        """
+        Handle errors which occur during an emit() call.
+
+        This method should be called from handlers when an exception is
+        encountered during an emit() call. This is what is mostly wanted
+        for a logging system - most users will not care about errors in
+        the logging system, they are more interested in application errors.
+        You could, however, replace this with a custom handler if you wish.
+        The record which was being processed is passed in to this method.
+        """
+        if not settings.HANDLE_ERROR_FALLBACK_ENABLED:
+            return
+
+        msg = JsonFormatter.format_error_msg(record, exception)
+        json.dump(msg, sys.stderr)
+        sys.stderr.write("\n")
+
+    def __repr__(self):
+        level = get_level_name(self.level)
+        return f"<${self.__class__.__name__} (${level})>"
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/handlers/files.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/handlers/files.py
new file mode 100644
index 0000000..58415ad
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/handlers/files.py
@@ -0,0 +1,480 @@
+# The following code and documentation was inspired, and in some cases
+# copied and modified, from the work of Vinay Sajip and contributors
+# on cpython's logging package
+
+import abc
+import asyncio
+import datetime
+import enum
+import os
+import re
+import time
+from asyncio import AbstractEventLoop
+from typing import Callable, List, Optional
+
+import aiofiles
+from aiofiles.threadpool import AsyncTextIOWrapper
+
+from aiologger.handlers.base import Handler
+from aiologger.records import LogRecord
+from aiologger.utils import classproperty, get_running_loop, loop_compat
+
+
+@loop_compat
+class AsyncFileHandler(Handler):
+    terminator = "\n"
+
+    def __init__(
+        self, filename: str, mode: str = "a", encoding: str = None
+    ) -> None:
+        super().__init__()
+        filename = os.fspath(filename)
+        self.absolute_file_path = os.path.abspath(filename)
+        self.mode = mode
+        self.encoding = encoding
+        self.stream: AsyncTextIOWrapper = None
+        self._initialization_lock = None
+
+    @property
+    def initialized(self):
+        return self.stream is not None
+
+    async def _init_writer(self):
+        """
+        Open the current base file with the (original) mode and encoding.
+        """
+        if not self._initialization_lock:
+            self._initialization_lock = asyncio.Lock()
+
+        async with self._initialization_lock:
+            if not self.initialized:
+                self.stream = await aiofiles.open(
+                    file=self.absolute_file_path,
+                    mode=self.mode,
+                    encoding=self.encoding,
+                )
+
+    async def flush(self):
+        await self.stream.flush()
+
+    async def close(self):
+        if not self.initialized:
+            return
+        await self.stream.flush()
+        await self.stream.close()
+        self.stream = None
+        self._initialization_lock = None
+
+    async def emit(self, record: LogRecord):
+        if not self.initialized:
+            await self._init_writer()
+
+        try:
+            msg = self.formatter.format(record)
+
+            # Write order is not guaranteed. String concatenation required
+            await self.stream.write(msg + self.terminator)
+
+            await self.stream.flush()
+        except Exception as exc:
+            await self.handle_error(record, exc)
+
+
+Namer = Callable[[str], str]
+Rotator = Callable[[str, str], None]
+
+
+class BaseAsyncRotatingFileHandler(AsyncFileHandler, metaclass=abc.ABCMeta):
+    def __init__(
+        self,
+        filename: str,
+        mode: str = "a",
+        encoding: str = None,
+        namer: Namer = None,
+        rotator: Rotator = None,
+    ) -> None:
+        super().__init__(filename, mode, encoding)
+        self.mode = mode
+        self.encoding = encoding
+        self.namer = namer
+        self.rotator = rotator
+        self._rollover_lock: Optional[asyncio.Lock] = None
+
+    def should_rollover(self, record: LogRecord) -> bool:
+        raise NotImplementedError
+
+    async def do_rollover(self):
+        raise NotImplementedError
+
+    async def emit(self, record: LogRecord):  # type: ignore
+        """
+        Emit a record.
+
+        Output the record to the file, catering for rollover as described
+        in `do_rollover`.
+        """
+        try:
+            if self.should_rollover(record):
+                if not self._rollover_lock:
+                    self._rollover_lock = asyncio.Lock()
+
+                async with self._rollover_lock:
+                    if self.should_rollover(record):
+                        await self.do_rollover()
+            await super().emit(record)
+        except Exception as exc:
+            await self.handle_error(record, exc)
+
+    def rotation_filename(self, default_name: str) -> str:
+        """
+        Modify the filename of a log file when rotating.
+
+        This is provided so that a custom filename can be provided.
+
+        :param default_name: The default name for the log file.
+        """
+        if self.namer is None:
+            return default_name
+
+        return self.namer(default_name)
+
+    async def rotate(self, source: str, dest: str):
+        """
+        When rotating, rotate the current log.
+
+        The default implementation calls the 'rotator' attribute of the
+        handler, if it's callable, passing the source and dest arguments to
+        it. If the attribute isn't callable (the default is None), the source
+        is simply renamed to the destination.
+
+        :param source: The source filename. This is normally the base
+                       filename, e.g. 'test.log'
+        :param dest:   The destination filename. This is normally
+                       what the source is rotated to, e.g. 'test.log.1'.
+        """
+        if self.rotator is None:
+            # logging issue 18940: A file may not have been created if delay is True.
+            loop = get_running_loop()
+            if await loop.run_in_executor(None, lambda: os.path.exists(source)):
+                await loop.run_in_executor(  # type: ignore
+                    None, lambda: os.rename(source, dest)
+                )
+        else:
+            self.rotator(source, dest)
+
+
+class RolloverInterval(str, enum.Enum):
+    SECONDS = "S"
+    MINUTES = "M"
+    HOURS = "H"
+    DAYS = "D"
+    MONDAYS = "W0"
+    TUESDAYS = "W1"
+    WEDNESDAYS = "W2"
+    THUERDAYS = "W3"
+    FRIDAYS = "W4"
+    SATURDAYS = "W5"
+    SUNDAYS = "W6"
+    MIDNIGHT = "MIDNIGHT"
+
+    @classproperty
+    def WEEK_DAYS(cls):
+        return (
+            cls.MONDAYS,
+            cls.TUESDAYS,
+            cls.WEDNESDAYS,
+            cls.THUERDAYS,
+            cls.FRIDAYS,
+            cls.SATURDAYS,
+            cls.SUNDAYS,
+        )
+
+
+ONE_MINUTE_IN_SECONDS = 60
+ONE_HOUR_IN_SECONDS = 60 * 60
+ONE_DAY_IN_SECONDS = ONE_HOUR_IN_SECONDS * 24
+ONE_WEEK_IN_SECONDS = 7 * ONE_DAY_IN_SECONDS
+
+
+class AsyncTimedRotatingFileHandler(BaseAsyncRotatingFileHandler):
+    """
+    Handler for logging to a file, rotating the log file at certain timed
+    intervals.
+
+    If `backup_count` is > 0, when rollover is done, no more than `backup_count`
+    files are kept - the oldest ones are deleted.
+
+    | when       | at_time behavior                                       |
+    |------------|--------------------------------------------------------|
+    | SECONDS    | at_time will be ignored                                |
+    | MINUTES    | -- // --                                               |
+    | HOURS      | -- // --                                               |
+    | DAYS       | at_time will be IGNORED. See also MIDNIGHT             |
+    | MONDAYS    | rotation happens every WEEK on MONDAY at ${at_time}    |
+    | TUESDAYS   | rotation happens every WEEK on TUESDAY at ${at_time}   |
+    | WEDNESDAYS | rotation happens every WEEK on WEDNESDAY at ${at_time} |
+    | THUERDAYS  | rotation happens every WEEK on THUERDAY at ${at_time}  |
+    | FRIDAYS    | rotation happens every WEEK on FRIDAY at ${at_time}    |
+    | SATURDAYS  | rotation happens every WEEK on SATURDAY at ${at_time}  |
+    | SUNDAYS    | rotation happens every WEEK on SUNDAY at ${at_time}    |
+    | MIDNIGHT   | rotation happens every DAY at ${at_time}               |
+    """
+
+    def __init__(
+        self,
+        filename: str,
+        when: RolloverInterval = RolloverInterval.HOURS,
+        interval: int = 1,
+        backup_count: int = 0,
+        encoding: str = None,
+        utc: bool = False,
+        at_time: datetime.time = None,
+    ) -> None:
+        super().__init__(filename=filename, mode="a", encoding=encoding)
+        self.when = when.upper()
+        self.backup_count = backup_count
+        self.utc = utc
+        self.at_time = at_time
+        # Calculate the real rollover interval, which is just the number of
+        # seconds between rollovers.  Also set the filename suffix used when
+        # a rollover occurs.  Current 'when' events supported:
+        # S - Seconds
+        # M - Minutes
+        # H - Hours
+        # D - Days
+        # midnight - roll over at midnight
+        # W{0-6} - roll over on a certain day; 0 - Monday
+        #
+        # Case of the 'when' specifier is not important; lower or upper case
+        # will work.
+        if self.when == RolloverInterval.SECONDS:
+            self.interval = 1  # one second
+            self.suffix = "%Y-%m-%d_%H-%M-%S"
+            ext_match = r"^\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2}(\.\w+)?$"
+        elif self.when == RolloverInterval.MINUTES:
+            self.interval = ONE_MINUTE_IN_SECONDS  # one minute
+            self.suffix = "%Y-%m-%d_%H-%M"
+            ext_match = r"^\d{4}-\d{2}-\d{2}_\d{2}-\d{2}(\.\w+)?$"
+        elif self.when == RolloverInterval.HOURS:
+            self.interval = ONE_HOUR_IN_SECONDS  # one hour
+            self.suffix = "%Y-%m-%d_%H"
+            ext_match = r"^\d{4}-\d{2}-\d{2}_\d{2}(\.\w+)?$"
+        elif (
+            self.when == RolloverInterval.DAYS
+            or self.when == RolloverInterval.MIDNIGHT
+        ):
+            self.interval = ONE_DAY_IN_SECONDS  # one day
+            self.suffix = "%Y-%m-%d"
+            ext_match = r"^\d{4}-\d{2}-\d{2}(\.\w+)?$"
+        elif self.when.startswith("W"):
+            if self.when not in RolloverInterval.WEEK_DAYS:
+                raise ValueError(
+                    f"Invalid day specified for weekly rollover: {self.when}"
+                )
+            self.interval = ONE_DAY_IN_SECONDS * 7  # one week
+            self.day_of_week = int(self.when[1])
+            self.suffix = "%Y-%m-%d"
+            ext_match = r"^\d{4}-\d{2}-\d{2}(\.\w+)?$"
+        else:
+            raise ValueError(f"Invalid RolloverInterval specified: {self.when}")
+
+        self.ext_match = re.compile(ext_match, re.ASCII)
+        self.interval = self.interval * interval  # multiply by units requested
+        # The following line added because the filename passed in could be a
+        # path object (see Issue #27493), but self.baseFilename will be a string
+        filename = self.absolute_file_path
+        if os.path.exists(filename):  # todo: IO. Remove or postpone
+            t = int(os.stat(filename).st_mtime)
+        else:
+            t = int(time.time())
+        self.rollover_at = self.compute_rollover(t)
+
+    def compute_rollover(self, current_time: int) -> int:
+        """
+        Work out the rollover time based on the specified time.
+
+        If we are rolling over at midnight or weekly, then the interval is
+        already known. need to figure out is WHEN the next interval is.
+        In other words, if you are rolling over at midnight, then your base
+        interval is 1 day, but you want to start that one day clock at midnight,
+         not now. So, we have to fudge the `rollover_at` value in order to trigger
+         the first rollover at the right time.  After that, the regular interval
+         will take care of the rest.  Note that this code doesn't care about
+         leap seconds. :)
+        """
+        result = current_time + self.interval
+
+        if (
+            self.when == RolloverInterval.MIDNIGHT
+            or self.when in RolloverInterval.WEEK_DAYS
+        ):
+            if self.utc:
+                t = time.gmtime(current_time)
+            else:
+                t = time.localtime(current_time)
+            current_hour = t[3]
+            current_minute = t[4]
+            current_second = t[5]
+            current_day = t[6]
+            # r is the number of seconds left between now and the next rotation
+            if self.at_time is None:
+                rotate_ts = ONE_DAY_IN_SECONDS
+            else:
+                rotate_ts = (
+                    self.at_time.hour * 60 + self.at_time.minute
+                ) * 60 + self.at_time.second
+
+            r = rotate_ts - (
+                (current_hour * 60 + current_minute) * 60 + current_second
+            )
+            if r < 0:
+                # Rotate time is before the current time (for example when
+                # self.rotateAt is 13:45 and it now 14:15), rotation is
+                # tomorrow.
+                r += ONE_DAY_IN_SECONDS
+                current_day = (current_day + 1) % 7
+            result = current_time + r
+            # If we are rolling over on a certain day, add in the number of days until
+            # the next rollover, but offset by 1 since we just calculated the time
+            # until the next day starts.  There are three cases:
+            # Case 1) The day to rollover is today; in this case, do nothing
+            # Case 2) The day to rollover is further in the interval (i.e., today is
+            #         day 2 (Wednesday) and rollover is on day 6 (Sunday).  Days to
+            #         next rollover is simply 6 - 2 - 1, or 3.
+            # Case 3) The day to rollover is behind us in the interval (i.e., today
+            #         is day 5 (Saturday) and rollover is on day 3 (Thursday).
+            #         Days to rollover is 6 - 5 + 3, or 4.  In this case, it's the
+            #         number of days left in the current week (1) plus the number
+            #         of days in the next week until the rollover day (3).
+            # The calculations described in 2) and 3) above need to have a day added.
+            # This is because the above time calculation takes us to midnight on this
+            # day, i.e. the start of the next day.
+            if self.when in RolloverInterval.WEEK_DAYS:
+                day = current_day  # 0 is Monday
+                if day != self.day_of_week:
+                    if day < self.day_of_week:
+                        days_to_wait = self.day_of_week - day
+                    else:
+                        days_to_wait = 6 - day + self.day_of_week + 1
+                    new_rollover_at = result + (
+                        days_to_wait * ONE_DAY_IN_SECONDS
+                    )
+                    if not self.utc:
+                        dst_now = t[-1]
+                        dst_at_rollover = time.localtime(new_rollover_at)[-1]
+                        if dst_now != dst_at_rollover:
+                            if not dst_now:
+                                # DST kicks in before next rollover, so we need to deduct an hour
+                                new_rollover_at -= ONE_HOUR_IN_SECONDS
+                            else:
+                                # DST bows out before next rollover, so we need to add an hour
+                                new_rollover_at += ONE_HOUR_IN_SECONDS
+                    result = new_rollover_at
+        return result
+
+    def should_rollover(self, record: LogRecord) -> bool:
+        """
+        Determine if rollover should occur.
+
+        record is not used, as we are just comparing times, but it is needed so
+        the method signatures are the same
+        """
+        t = int(time.time())
+        if t >= self.rollover_at:
+            return True
+        return False
+
+    async def get_files_to_delete(self) -> List[str]:
+        """
+        Determine the files to delete when rolling over.
+        """
+        dir_name, base_name = os.path.split(self.absolute_file_path)
+        loop = get_running_loop()
+        file_names = await loop.run_in_executor(
+            None, lambda: os.listdir(dir_name)
+        )
+        result = []
+        prefix = base_name + "."
+        plen = len(prefix)
+        for file_name in file_names:
+            if file_name[:plen] == prefix:
+                suffix = file_name[plen:]
+                if self.ext_match.match(suffix):
+                    result.append(os.path.join(dir_name, file_name))
+        if len(result) < self.backup_count:
+            return []
+        else:
+            result.sort(reverse=True)  # os.listdir order is not defined
+            return result[: len(result) - self.backup_count]
+
+    async def _delete_files(self, file_paths: List[str]):
+        loop = get_running_loop()
+        delete_tasks = (
+            loop.run_in_executor(None, lambda: os.unlink(file_path))
+            for file_path in file_paths
+        )
+        await asyncio.gather(*delete_tasks)
+
+    async def do_rollover(self):
+        """
+        do a rollover; in this case, a date/time stamp is appended to the filename
+        when the rollover happens.  However, you want the file to be named for the
+        start of the interval, not the current time.  If there is a backup count,
+        then we have to get a list of matching filenames, sort them and remove
+        the one with the oldest suffix.
+        """
+        if self.stream:
+            await self.stream.close()
+            self.stream = None
+        # get the time that this sequence started at and make it a TimeTuple
+        current_time = int(time.time())
+        dst_now = time.localtime(current_time)[-1]
+        t = self.rollover_at - self.interval
+        if self.utc:
+            time_tuple = time.gmtime(t)
+        else:
+            time_tuple = time.localtime(t)
+            dst_then = time_tuple[-1]
+            if dst_now != dst_then:
+                if dst_now:
+                    addend = ONE_HOUR_IN_SECONDS
+                else:
+                    addend = -ONE_HOUR_IN_SECONDS
+                time_tuple = time.localtime(t + addend)
+        destination_file_path = self.rotation_filename(
+            self.absolute_file_path
+            + "."
+            + time.strftime(self.suffix, time_tuple)
+        )
+        loop = get_running_loop()
+        if await loop.run_in_executor(
+            None, lambda: os.path.exists(destination_file_path)
+        ):
+            await loop.run_in_executor(
+                None, lambda: os.unlink(destination_file_path)
+            )
+        await self.rotate(self.absolute_file_path, destination_file_path)
+        if self.backup_count > 0:
+            files_to_delete = await self.get_files_to_delete()
+            if files_to_delete:
+                await self._delete_files(files_to_delete)
+
+        await self._init_writer()
+        new_rollover_at = self.compute_rollover(current_time)
+        while new_rollover_at <= current_time:
+            new_rollover_at = new_rollover_at + self.interval
+        # If DST changes and midnight or weekly rollover, adjust for this.
+        if (
+            self.when == RolloverInterval.MIDNIGHT
+            or self.when in RolloverInterval.WEEK_DAYS
+        ) and not self.utc:
+            dst_at_rollover = time.localtime(new_rollover_at)[-1]
+            if dst_now != dst_at_rollover:
+                if not dst_now:
+                    # DST kicks in before next rollover, so we need to deduct an hour
+                    addend = -ONE_HOUR_IN_SECONDS
+                else:
+                    # DST bows out before next rollover, so we need to add an hour
+                    addend = ONE_HOUR_IN_SECONDS
+                new_rollover_at += addend
+        self.rollover_at = new_rollover_at
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/handlers/streams.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/handlers/streams.py
new file mode 100644
index 0000000..64674e7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/handlers/streams.py
@@ -0,0 +1,98 @@
+import asyncio
+import sys
+from asyncio import AbstractEventLoop, StreamWriter
+from typing import Union, Optional
+
+from aiologger.utils import get_running_loop, loop_compat
+from aiologger.filters import Filter
+from aiologger.formatters.base import Formatter
+from aiologger.handlers.base import Handler
+from aiologger.levels import LogLevel
+from aiologger.protocols import AiologgerProtocol
+from aiologger.records import LogRecord
+
+
+@loop_compat
+class AsyncStreamHandler(Handler):
+    terminator = "\n"
+
+    def __init__(
+        self,
+        stream=None,
+        level: Union[str, int, LogLevel] = LogLevel.NOTSET,
+        formatter: Formatter = None,
+        filter: Filter = None,
+    ) -> None:
+        super().__init__()
+        if stream is None:
+            stream = sys.stderr
+        self.stream = stream
+        self.level = level
+        if formatter is None:
+            formatter = Formatter()
+        self.formatter: Formatter = formatter
+        if filter:
+            self.add_filter(filter)
+        self.protocol_class = AiologgerProtocol
+        self._initialization_lock = asyncio.Lock()
+        self.writer: Optional[StreamWriter] = None
+
+    @property
+    def initialized(self):
+        return self.writer is not None
+
+    async def _init_writer(self) -> StreamWriter:
+        async with self._initialization_lock:
+            if self.writer is not None:
+                return self.writer
+
+            loop = get_running_loop()
+            transport, protocol = await loop.connect_write_pipe(
+                self.protocol_class, self.stream
+            )
+
+            self.writer = StreamWriter(  # type: ignore # https://github.com/python/typeshed/pull/2719
+                transport=transport, protocol=protocol, reader=None, loop=loop
+            )
+            return self.writer
+
+    async def handle(self, record: LogRecord) -> bool:
+        """
+        Conditionally emit the specified logging record.
+        Emission depends on filters which may have been added to the handler.
+        """
+        rv = self.filter(record)
+        if rv:
+            await self.emit(record)
+        return rv
+
+    async def flush(self):
+        await self.writer.drain()
+
+    async def emit(self, record: LogRecord):
+        """
+        Actually log the specified logging record to the stream.
+        """
+        if self.writer is None:
+            self.writer = await self._init_writer()
+
+        try:
+            msg = self.formatter.format(record) + self.terminator
+
+            self.writer.write(msg.encode())
+            await self.writer.drain()
+        except Exception as exc:
+            await self.handle_error(record, exc)
+
+    async def close(self):
+        """
+        Tidy up any resources used by the handler.
+
+        This version removes the handler from an internal map of handlers,
+        should ensure that this gets called from overridden close()
+        methods.
+        """
+        if self.writer is None:
+            return
+        await self.flush()
+        self.writer.close()
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/levels.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/levels.py
new file mode 100644
index 0000000..2e0cdd9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/levels.py
@@ -0,0 +1,47 @@
+import enum
+from typing import Union
+
+
+class LogLevel(enum.IntEnum):
+    CRITICAL = 50
+    FATAL = CRITICAL
+    ERROR = 40
+    WARNING = 30
+    WARN = WARNING
+    INFO = 20
+    DEBUG = 10
+    NOTSET = 0
+
+
+NAME_TO_LEVEL = {level: LogLevel[level].value for level in LogLevel.__members__}
+LEVEL_TO_NAME = {level.value: level.name for level in LogLevel}
+
+
+def get_level_name(level: Union[int, LogLevel]) -> str:
+    """
+    Return the textual representation of logging level 'level'.
+
+    If the level is one of the predefined levels (CRITICAL, ERROR, WARNING,
+    INFO, DEBUG) then you get the corresponding string.
+
+    If a numeric value corresponding to one of the defined levels is passed
+    in, the corresponding string representation is returned.
+    """
+    try:
+        return LEVEL_TO_NAME[level]
+    except KeyError as e:
+        raise ValueError(f"Unkown level name: {level}") from e
+
+
+def check_level(level: Union[str, int, LogLevel]) -> int:
+    if isinstance(level, int):
+        if level not in LEVEL_TO_NAME:
+            raise ValueError(f"Unknown level: {level}")
+        return level
+    elif isinstance(level, str):
+        try:
+            return NAME_TO_LEVEL[level]
+        except KeyError:
+            raise ValueError(f"Unknown level: {level}")
+    else:
+        raise TypeError(f"Level not an Union[str, int, LogLevel]: {level}")
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/logger.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/logger.py
new file mode 100644
index 0000000..5b9fb3d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/logger.py
@@ -0,0 +1,344 @@
+import asyncio
+import io
+import sys
+import traceback
+from asyncio import AbstractEventLoop, Task
+from typing import Iterable, Optional, Callable, Awaitable, List, NamedTuple
+
+from aiologger.filters import StdoutFilter, Filterer
+from aiologger.formatters.base import Formatter
+from aiologger.handlers.base import Handler
+from aiologger.handlers.streams import AsyncStreamHandler
+from aiologger.levels import LogLevel, check_level
+from aiologger.records import LogRecord
+from aiologger.utils import (
+    get_current_frame,
+    create_task,
+    loop_compat,
+    bind_loop,
+)
+
+_HandlerFactory = Callable[[], Awaitable[Iterable[Handler]]]
+
+
+class _Caller(NamedTuple):
+    filename: str
+    line_number: int
+    function_name: str
+    stack: Optional[str]
+
+
+def o_o():
+    """
+    Ordinarily we would use __file__ for this, but frozen modules don't always
+    have __file__ set, for some reason (see Issue logging#21736). Thus, we get
+    the filename from a handy code object from a function defined in this
+    module.
+    """
+    raise NotImplementedError(
+        "I shouldn't be called. My only purpose is to provide "
+        "the filename from a handy code object."
+    )
+
+
+# _srcfile is used when walking the stack to check when we've got the first
+# caller stack frame, by skipping frames whose filename is that of this
+# module's source. It therefore should contain the filename of this module's
+# source file.
+_srcfile = o_o.__code__.co_filename
+
+
+@loop_compat
+class Logger(Filterer):
+    def __init__(self, *, name="aiologger", level=LogLevel.NOTSET) -> None:
+        super(Logger, self).__init__()
+        self.name = name
+        self.level = check_level(level)
+        self.parent = None
+        self.propagate = True
+        self.handlers: List[Handler] = []
+        self.disabled = False
+        self._was_shutdown = False
+
+        self._dummy_task: Optional[Task] = None
+
+    @classmethod
+    def with_default_handlers(
+        cls,
+        *,
+        name="aiologger",
+        level=LogLevel.NOTSET,
+        formatter: Optional[Formatter] = None,
+        **kwargs,
+    ):
+        self = cls(name=name, level=level, **kwargs)  # type: ignore
+
+        _AsyncStreamHandler = bind_loop(AsyncStreamHandler, kwargs)
+        self.add_handler(
+            _AsyncStreamHandler(
+                stream=sys.stdout,
+                level=LogLevel.DEBUG,
+                formatter=formatter,
+                filter=StdoutFilter(),
+            )
+        )
+        self.add_handler(
+            _AsyncStreamHandler(
+                stream=sys.stderr, level=LogLevel.WARNING, formatter=formatter
+            )
+        )
+
+        return self
+
+    def find_caller(self, stack_info=False) -> _Caller:
+        """
+        Find the stack frame of the caller so that we can note the source
+        file name, line number and function name.
+        """
+        frame = get_current_frame()
+        # On some versions of IronPython, currentframe() returns None if
+        # IronPython isn't run with -X:Frames.
+        if frame is not None:
+            frame = frame.f_back
+        while hasattr(frame, "f_code"):
+            code = frame.f_code
+            filename = code.co_filename
+            if filename == _srcfile:
+                frame = frame.f_back
+                continue
+            sinfo = None
+            if stack_info:
+                sio = io.StringIO()
+                sio.write("Stack (most recent call last):\n")
+                traceback.print_stack(frame, file=sio)
+                sinfo = sio.getvalue()
+                if sinfo[-1] == "\n":
+                    sinfo = sinfo[:-1]
+                sio.close()
+            return _Caller(
+                filename=code.co_filename or "(unknown file)",
+                line_number=frame.f_lineno,
+                function_name=code.co_name,
+                stack=sinfo,
+            )
+        return _Caller(
+            filename="(unknown file)",
+            line_number=0,
+            function_name="(unknown function)",
+            stack=None,
+        )
+
+    async def call_handlers(self, record):
+        """
+        Pass a record to all relevant handlers.
+
+        Loop through all handlers for this logger and its parents in the
+        logger hierarchy. If no handler was found, raises an error. Stop
+        searching up the hierarchy whenever a logger with the "propagate"
+        attribute set to zero is found - that will be the last logger
+        whose handlers are called.
+        """
+        c = self
+        found = 0
+        while c:
+            for handler in c.handlers:
+                found = found + 1
+                if record.levelno >= handler.level:
+                    await handler.handle(record)
+            if not c.propagate:
+                c = None  # break out
+            else:
+                c = c.parent
+        if found == 0:
+            raise Exception("No handlers could be found for logger")
+
+    def add_handler(self, handler: Handler) -> None:
+        """
+        Add the specified handler to this logger.
+        """
+        if not (handler in self.handlers):
+            self.handlers.append(handler)
+
+    def remove_handler(self, handler: Handler) -> None:
+        """
+        Remove the specified handler from this logger.
+        """
+        if handler in self.handlers:
+            self.handlers.remove(handler)
+
+    async def handle(self, record):
+        """
+        Call the handlers for the specified record.
+
+        This method is used for unpickled records received from a socket, as
+        well as those created locally. Logger-level filtering is applied.
+        """
+        if (not self.disabled) and self.filter(record):
+            await self.call_handlers(record)
+
+    def _log(
+        self,
+        level,
+        msg,
+        args,
+        exc_info=None,
+        extra=None,
+        stack_info=False,
+        caller: _Caller = None,
+    ) -> Task:
+
+        sinfo = None
+        if _srcfile and caller is None:  # type: ignore
+            # IronPython doesn't track Python frames, so find_caller raises an
+            # exception on some versions of IronPython. We trap it here so that
+            # IronPython can use logging.
+            try:
+                fn, lno, func, sinfo = self.find_caller(stack_info)
+            except ValueError:  # pragma: no cover
+                fn, lno, func = "(unknown file)", 0, "(unknown function)"
+        elif caller:
+            fn, lno, func, sinfo = caller
+        else:  # pragma: no cover
+            fn, lno, func = "(unknown file)", 0, "(unknown function)"
+        if exc_info and isinstance(exc_info, BaseException):
+            exc_info = (type(exc_info), exc_info, exc_info.__traceback__)
+
+        record = LogRecord(  # type: ignore
+            name=self.name,
+            level=level,
+            pathname=fn,
+            lineno=lno,
+            msg=msg,
+            args=args,
+            exc_info=exc_info,
+            func=func,
+            sinfo=sinfo,
+            extra=extra,
+        )
+        return create_task(self.handle(record))
+
+    def __make_dummy_task(self) -> Task:
+        async def _dummy(*args, **kwargs):
+            return
+
+        return create_task(_dummy())
+
+    def is_enabled_for(self, level) -> bool:
+        return level >= self.level
+
+    def _make_log_task(self, level, msg, *args, **kwargs) -> Task:
+        """
+        Creates an asyncio.Task for a msg if logging is enabled for level.
+        Returns a dummy task otherwise.
+        """
+        if not self.is_enabled_for(level):
+            if self._dummy_task is None:
+                self._dummy_task = self.__make_dummy_task()
+            return self._dummy_task
+
+        if kwargs.get("exc_info", False):
+            if not isinstance(kwargs["exc_info"], BaseException):
+                kwargs["exc_info"] = sys.exc_info()
+
+        return self._log(  # type: ignore
+            level, msg, *args, caller=self.find_caller(False), **kwargs
+        )
+
+    def debug(self, msg, *args, **kwargs) -> Task:
+        """
+        Log msg with severity 'DEBUG'.
+
+        To pass exception information, use the keyword argument exc_info with
+        a true value, e.g.
+
+        await logger.debug("Houston, we have a %s", "thorny problem", exc_info=1)
+        """
+        return self._make_log_task(LogLevel.DEBUG, msg, args, **kwargs)
+
+    def info(self, msg, *args, **kwargs) -> Task:
+        """
+        Log msg with severity 'INFO'.
+
+        To pass exception information, use the keyword argument exc_info with
+        a true value, e.g.
+
+        await logger.info("Houston, we have an interesting problem", exc_info=1)
+        """
+        return self._make_log_task(LogLevel.INFO, msg, args, **kwargs)
+
+    def warning(self, msg, *args, **kwargs) -> Task:
+        """
+        Log msg with severity 'WARNING'.
+
+        To pass exception information, use the keyword argument exc_info with
+        a true value, e.g.
+
+        await logger.warning("Houston, we have a bit of a problem", exc_info=1)
+        """
+        return self._make_log_task(LogLevel.WARNING, msg, args, **kwargs)
+
+    warn = warning
+
+    def error(self, msg, *args, **kwargs) -> Task:
+        """
+        Log msg with severity 'ERROR'.
+
+        To pass exception information, use the keyword argument exc_info with
+        a true value, e.g.
+
+        await logger.error("Houston, we have a major problem", exc_info=1)
+        """
+        return self._make_log_task(LogLevel.ERROR, msg, args, **kwargs)
+
+    def critical(self, msg, *args, **kwargs) -> Task:
+        """
+        Log msg with severity 'CRITICAL'.
+
+        To pass exception information, use the keyword argument exc_info with
+        a true value, e.g.
+
+        await logger.critical("Houston, we have a major disaster", exc_info=1)
+        """
+        return self._make_log_task(LogLevel.CRITICAL, msg, args, **kwargs)
+
+    fatal = critical
+
+    def exception(self, msg, *args, exc_info=True, **kwargs) -> Task:
+        """
+        Convenience method for logging an ERROR with exception information.
+        """
+        return self.error(msg, *args, exc_info=exc_info, **kwargs)
+
+    async def shutdown(self):
+        """
+        Perform any cleanup actions in the logging system (e.g. flushing
+        buffers).
+
+        Should be called at application exit.
+        """
+        if self._was_shutdown:
+            return
+        self._was_shutdown = True
+        await self._do_shutdown()
+
+    async def _do_shutdown(self):
+        """
+        Does actual shutdown
+        """
+        for handler in reversed(self.handlers):
+            if not handler:
+                continue
+            try:
+                if handler.initialized:
+                    await handler.flush()
+                    await handler.close()
+
+            except Exception:
+                """
+                Ignore errors which might be caused
+                because handlers have been closed but
+                references to them are still around at
+                application exit. Basically ignore everything,
+                as we're shutting down
+                """
+                pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/loggers/__init__.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/loggers/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/loggers/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/aiologger/loggers/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..008a6db
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diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/loggers/__pycache__/json.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/aiologger/loggers/__pycache__/json.cpython-38.pyc
new file mode 100644
index 0000000..5c22eef
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/aiologger/loggers/__pycache__/json.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/loggers/json.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/loggers/json.py
new file mode 100644
index 0000000..75c0c11
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/loggers/json.py
@@ -0,0 +1,112 @@
+import json
+from datetime import timezone
+from asyncio import AbstractEventLoop, Task
+from typing import Dict, Iterable, Callable, Tuple, Any, Optional, Mapping
+
+from aiologger import Logger
+from aiologger.utils import create_task, loop_compat
+from aiologger.formatters.base import Formatter
+from aiologger.formatters.json import ExtendedJsonFormatter
+from aiologger.levels import LogLevel
+from aiologger.logger import _Caller
+from aiologger.records import ExtendedLogRecord
+
+
+@loop_compat
+class JsonLogger(Logger):
+    def __init__(
+        self,
+        name: str = "aiologger-json",
+        level: int = LogLevel.DEBUG,
+        flatten: bool = False,
+        serializer_kwargs: Dict = None,
+        extra: Dict = None,
+    ) -> None:
+        super().__init__(name=name, level=level)
+
+        self.flatten = flatten
+
+        if serializer_kwargs is None:
+            serializer_kwargs = {}
+        self.serializer_kwargs = serializer_kwargs
+
+        if extra is None:
+            extra = {}
+        self.extra = extra
+
+    @classmethod
+    def with_default_handlers(  # type: ignore
+        cls,
+        *,
+        name: str = "aiologger-json",
+        level: int = LogLevel.NOTSET,
+        serializer: Callable[..., str] = json.dumps,
+        flatten: bool = False,
+        serializer_kwargs: Dict = None,
+        extra: Dict = None,
+        exclude_fields: Iterable[str] = None,
+        tz: timezone = None,
+        formatter: Optional[Formatter] = None,
+        **kwargs,
+    ):
+        if formatter is None:
+            formatter = ExtendedJsonFormatter(
+                serializer=serializer, exclude_fields=exclude_fields, tz=tz
+            )
+        return super(JsonLogger, cls).with_default_handlers(
+            name=name,
+            level=level,
+            flatten=flatten,
+            serializer_kwargs=serializer_kwargs,
+            extra=extra,
+            formatter=formatter,
+            **kwargs,
+        )
+
+    def _log(  # type: ignore
+        self,
+        level: LogLevel,
+        msg: Any,
+        args: Optional[Tuple[Mapping]],
+        exc_info=None,
+        extra: Dict = None,
+        stack_info=False,
+        flatten: bool = False,
+        serializer_kwargs: Dict = None,
+        caller: _Caller = None,
+    ) -> Task:
+        """
+        Low-level logging routine which creates a ExtendedLogRecord and
+        then calls all the handlers of this logger to handle the record.
+
+        Overwritten to properly handle log methods kwargs
+        """
+        sinfo = None
+        if caller:
+            fn, lno, func, sinfo = caller
+        else:  # pragma: no cover
+            fn, lno, func = "(unknown file)", 0, "(unknown function)"
+        if exc_info and isinstance(exc_info, BaseException):
+            exc_info = (type(exc_info), exc_info, exc_info.__traceback__)
+
+        joined_extra = {}
+        joined_extra.update(self.extra)
+
+        if extra:
+            joined_extra.update(extra)
+
+        record = ExtendedLogRecord(
+            name=self.name,
+            level=level,
+            pathname=fn,
+            lineno=lno,
+            msg=msg,
+            args=args,
+            exc_info=exc_info,
+            func=func,
+            sinfo=sinfo,
+            extra=joined_extra,
+            flatten=flatten or self.flatten,
+            serializer_kwargs=serializer_kwargs or self.serializer_kwargs,
+        )
+        return create_task(self.handle(record))
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/protocols.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/protocols.py
new file mode 100644
index 0000000..ca8af2d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/protocols.py
@@ -0,0 +1,6 @@
+import asyncio
+
+
+class AiologgerProtocol(asyncio.Protocol):
+    async def _drain_helper(self):
+        pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/records.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/records.py
new file mode 100644
index 0000000..284beef
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/records.py
@@ -0,0 +1,136 @@
+# The following code and documentation was inspired, and in some cases
+# copied and modified, from the work of Vinay Sajip and contributors
+# on cpython's logging package
+import os
+import time
+import types
+from collections.abc import Mapping
+from typing import Optional, Tuple, Type
+
+from aiologger.levels import LogLevel, get_level_name
+
+ExceptionInfo = Tuple[Type[BaseException], BaseException, types.TracebackType]
+
+
+class LogRecord:
+    """
+    A LogRecord instance represents an event being logged.
+
+    ExtendedLogRecord instances are created every time something is logged. They
+    contain all the information pertinent to the event being logged. The
+    main information passed in is in msg and args, which are combined
+    using str(msg) % args to create the message field of the record. The
+    record also includes information such as when the record was created,
+    the source line where the logging call was made, and any exception
+    information to be logged.
+    """
+
+    def __init__(
+        self,
+        name: str,
+        level: LogLevel,
+        pathname: str,
+        lineno: int,
+        msg,
+        args: Optional[Tuple[Mapping]] = None,
+        exc_info: Optional[ExceptionInfo] = None,
+        func: Optional[str] = None,
+        sinfo: Optional[str] = None,
+        **kwargs,
+    ) -> None:
+        """
+        :param name: The name of the logger used to log the event represented
+        by this LogRecord. Note that this name will always have this value,
+        even though it may be emitted by a handler attached to a
+        different (ancestor) logger.
+        :param level: The numeric level of the logging event (one of DEBUG,
+        INFO etc.) Note that this is converted to two attributes of the
+        LogRecord: levelno for the numeric value and levelname for the
+        corresponding level name.
+        :param pathname: The full pathname of the source file where the
+        logging call was made.
+        :param lineno: The line number in the source file where the logging
+        call was made.
+        :param msg: The event description message, possibly a format string
+        with placeholders for variable data.
+        :param args: Variable data to merge into the msg argument to obtain
+        the event description.
+        :param exc_info: An exception tuple with the current exception
+        information, or None if no exception information is available.
+        :param func: The name of the function or method from which the
+        logging call was invoked.
+        :param sinfo: A text string representing stack information from the
+        base of the stack in the current thread, up to the logging call.
+        """
+        created_at = time.time()
+        self.name = name
+        self.msg = msg
+        self.args: Optional[Mapping]
+        if args:
+            if len(args) != 1 or not isinstance(args[0], Mapping):
+                raise ValueError(
+                    f"Invalid LogRecord args type: {type(args[0])}. "
+                    f"Expected Mapping"
+                )
+            self.args: Optional[Mapping] = args[0]
+        else:
+            self.args = args
+        self.levelname = get_level_name(level)
+        self.levelno = level
+        self.pathname = pathname
+        try:
+            self.filename = os.path.basename(pathname)
+            self.module = os.path.splitext(self.filename)[0]
+        except (TypeError, ValueError, AttributeError):
+            self.filename = pathname
+            self.module = "Unknown module"
+        self.exc_info = exc_info
+        self.exc_text: Optional[str] = None  # used to cache the traceback text
+        self.stack_info = sinfo
+        self.lineno = lineno
+        self.funcName = func
+        self.created = created_at
+        self.msecs = (created_at - int(created_at)) * 1000
+        self.process = os.getpid()
+        self.asctime: Optional[str] = None
+        self.message: Optional[str] = None
+
+    def __str__(self):
+        return (
+            f"<{self.__class__.__name__}: {self.name}, {self.levelname}, "
+            f'{self.pathname}, {self.lineno}, "{self.msg}">'
+        )
+
+    __repr__ = __str__
+
+    def get_message(self):
+        """
+        Return the message for this LogRecord after merging any user-supplied
+        arguments with the message.
+        """
+        msg = str(self.msg)
+        if self.args:
+            msg = msg % self.args
+        return msg
+
+
+class ExtendedLogRecord(LogRecord):
+    def __init__(
+        self,
+        name: str,
+        level: LogLevel,
+        pathname: str,
+        lineno: int,
+        msg,
+        args: Optional[Tuple[Mapping]],
+        exc_info: Optional[ExceptionInfo],
+        func: Optional[str] = None,
+        sinfo: Optional[str] = None,
+        **kwargs,
+    ) -> None:
+        super().__init__(
+            name, level, pathname, lineno, msg, args, exc_info, func, sinfo
+        )
+        self.extra = kwargs["extra"]
+        self.flatten = kwargs["flatten"]
+        self.serializer_kwargs = kwargs["serializer_kwargs"]
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/settings.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/settings.py
new file mode 100644
index 0000000..cfbfc68
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/settings.py
@@ -0,0 +1,16 @@
+from os import getenv
+from typing import Optional
+
+
+def get_bool_env(name: str, default: Optional[bool] = None) -> bool:
+    value = getenv(name, default)
+    if not value:
+        return False
+    if value in ("False", "false", "0"):
+        return False
+    return True
+
+
+HANDLE_ERROR_FALLBACK_ENABLED = get_bool_env(
+    "AIOLOGGER_HANDLE_ERROR_FALLBACK_ENABLED", default=True
+)
diff --git a/python3-vckonline/lib/python3.8/site-packages/aiologger/utils.py b/python3-vckonline/lib/python3.8/site-packages/aiologger/utils.py
new file mode 100644
index 0000000..7e68986
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/aiologger/utils.py
@@ -0,0 +1,123 @@
+import sys
+import warnings
+import functools
+from asyncio import AbstractEventLoop
+from typing import Callable, TypeVar, Type, cast
+
+
+if sys.version_info >= (3, 7):
+    from asyncio import get_running_loop
+    from asyncio import create_task
+else:
+    from asyncio import _get_running_loop
+
+    def get_running_loop():
+        loop = _get_running_loop()
+        if loop is None:
+            raise RuntimeError("no running event loop")
+        return loop
+
+    def create_task(coro):
+        loop = get_running_loop()
+        return loop.create_task(coro)
+
+
+_T = TypeVar("_T", bound=Type[object])
+
+
+class _LoopCompat:
+    __loop = None
+
+    @property
+    def _loop(self) -> AbstractEventLoop:
+        warnings.warn(
+            "The .loop and ._loop attributes are deprecated", DeprecationWarning
+        )
+        loop = self.__loop
+        return get_running_loop() if loop is None else loop
+
+    @property
+    def loop(self) -> AbstractEventLoop:
+        warnings.warn(
+            "The .loop and ._loop attributes are deprecated", DeprecationWarning
+        )
+        return self._loop
+
+    @classmethod
+    def decorate(cls, v: _T) -> _T:
+        @functools.wraps(v.__init__)
+        def __init__(self, *args, **kwargs):
+            try:
+                self.__loop = kwargs.pop("loop")
+            except KeyError:
+                pass
+            else:
+                warnings.warn(
+                    "The loop argument is deprecated", DeprecationWarning
+                )
+            __init__.__wrapped__(self, *args, **kwargs)
+
+        v.__init__ = __init__  # type: ignore
+        v.__loop = None  # type: ignore
+        _loop = cls._loop
+        loop = cls.loop
+        if not hasattr(v, "_loop"):
+            v._loop = _loop  # type: ignore
+
+        if not hasattr(v, "loop"):
+            v.loop = loop  # type: ignore
+
+        return v
+
+
+_F = TypeVar("_F", bound=Callable[..., object])
+
+if sys.version_info >= (3, 10):
+
+    def loop_compat(v: _T) -> _T:
+        return v
+
+    def bind_loop(v: _F, kwargs: dict) -> _F:
+        return v
+
+
+else:
+    loop_compat = _LoopCompat.decorate
+
+    def bind_loop(v: _F, kwargs: dict) -> _F:
+        """
+        bind a loop kwarg, without letting mypy know about it
+        """
+        try:
+            return cast(_F, functools.partial(v, loop=kwargs["loop"]))
+        except KeyError:
+            pass
+        return v
+
+
+class classproperty:
+    def __init__(self, func):
+        self._func = func
+
+    def __get__(self, obj, owner):
+        return self._func(owner)
+
+
+class CallableWrapper:
+    def __init__(self, func: Callable) -> None:
+        self.func = func
+
+    def __call__(self, *args, **kwargs):
+        return self.func(*args, **kwargs)
+
+
+if hasattr(sys, "_getframe"):
+    get_current_frame = lambda: sys._getframe(3)
+else:  # pragma: no cover
+
+    def get_current_frame():
+        """Return the frame object for the caller's stack frame."""
+        try:
+            raise Exception
+        except Exception:
+            return sys.exc_info()[2].tb_frame.f_back
diff --git a/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/LICENSE.rst b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/LICENSE.rst
new file mode 100644
index 0000000..d12a849
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/LICENSE.rst
@@ -0,0 +1,28 @@
+Copyright 2014 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/METADATA
new file mode 100644
index 0000000..00d6974
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/METADATA
@@ -0,0 +1,102 @@
+Metadata-Version: 2.1
+Name: click
+Version: 7.1.2
+Summary: Composable command line interface toolkit
+Home-page: https://palletsprojects.com/p/click/
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Documentation, https://click.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/click
+Project-URL: Issue tracker, https://github.com/pallets/click/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 3
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
+
+\$ click\_
+==========
+
+Click is a Python package for creating beautiful command line interfaces
+in a composable way with as little code as necessary. It's the "Command
+Line Interface Creation Kit". It's highly configurable but comes with
+sensible defaults out of the box.
+
+It aims to make the process of writing command line tools quick and fun
+while also preventing any frustration caused by the inability to
+implement an intended CLI API.
+
+Click in three points:
+
+-   Arbitrary nesting of commands
+-   Automatic help page generation
+-   Supports lazy loading of subcommands at runtime
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    $ pip install -U click
+
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
+A Simple Example
+----------------
+
+.. code-block:: python
+
+    import click
+
+    @click.command()
+    @click.option("--count", default=1, help="Number of greetings.")
+    @click.option("--name", prompt="Your name", help="The person to greet.")
+    def hello(count, name):
+        """Simple program that greets NAME for a total of COUNT times."""
+        for _ in range(count):
+            click.echo(f"Hello, {name}!")
+
+    if __name__ == '__main__':
+        hello()
+
+.. code-block:: text
+
+    $ python hello.py --count=3
+    Your name: Click
+    Hello, Click!
+    Hello, Click!
+    Hello, Click!
+
+
+Donate
+------
+
+The Pallets organization develops and supports Click and other popular
+packages. In order to grow the community of contributors and users, and
+allow the maintainers to devote more time to the projects, `please
+donate today`_.
+
+.. _please donate today: https://palletsprojects.com/donate
+
+
+Links
+-----
+
+-   Website: https://palletsprojects.com/p/click/
+-   Documentation: https://click.palletsprojects.com/
+-   Releases: https://pypi.org/project/click/
+-   Code: https://github.com/pallets/click
+-   Issue tracker: https://github.com/pallets/click/issues
+-   Test status: https://dev.azure.com/pallets/click/_build
+-   Official chat: https://discord.gg/t6rrQZH
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/RECORD
new file mode 100644
index 0000000..8fc797d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/RECORD
@@ -0,0 +1,40 @@
+click-7.1.2.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+click-7.1.2.dist-info/LICENSE.rst,sha256=morRBqOU6FO_4h9C9OctWSgZoigF2ZG18ydQKSkrZY0,1475
+click-7.1.2.dist-info/METADATA,sha256=LrRgakZKV7Yg3qJqX_plu2WhFW81MzP3EqQmZhHIO8M,2868
+click-7.1.2.dist-info/RECORD,,
+click-7.1.2.dist-info/WHEEL,sha256=kGT74LWyRUZrL4VgLh6_g12IeVl_9u9ZVhadrgXZUEY,110
+click-7.1.2.dist-info/top_level.txt,sha256=J1ZQogalYS4pphY_lPECoNMfw0HzTSrZglC4Yfwo4xA,6
+click/__init__.py,sha256=FkyGDQ-cbiQxP_lxgUspyFYS48f2S_pTcfKPz-d_RMo,2463
+click/__pycache__/__init__.cpython-38.pyc,,
+click/__pycache__/_bashcomplete.cpython-38.pyc,,
+click/__pycache__/_compat.cpython-38.pyc,,
+click/__pycache__/_termui_impl.cpython-38.pyc,,
+click/__pycache__/_textwrap.cpython-38.pyc,,
+click/__pycache__/_unicodefun.cpython-38.pyc,,
+click/__pycache__/_winconsole.cpython-38.pyc,,
+click/__pycache__/core.cpython-38.pyc,,
+click/__pycache__/decorators.cpython-38.pyc,,
+click/__pycache__/exceptions.cpython-38.pyc,,
+click/__pycache__/formatting.cpython-38.pyc,,
+click/__pycache__/globals.cpython-38.pyc,,
+click/__pycache__/parser.cpython-38.pyc,,
+click/__pycache__/termui.cpython-38.pyc,,
+click/__pycache__/testing.cpython-38.pyc,,
+click/__pycache__/types.cpython-38.pyc,,
+click/__pycache__/utils.cpython-38.pyc,,
+click/_bashcomplete.py,sha256=9J98IHQYmCAr2Jup6TDshUr5FJEen-AoQCZR0K5nKxQ,12309
+click/_compat.py,sha256=AoMaYnZ-3pwtNXuHtlb6_UXsayoG0QZiHKIRy2VFezc,24169
+click/_termui_impl.py,sha256=yNktUMAdjYOU1HMkq915jR3zgAzUNtGSQqSTSSMn3eQ,20702
+click/_textwrap.py,sha256=ajCzkzFly5tjm9foQ5N9_MOeaYJMBjAltuFa69n4iXY,1197
+click/_unicodefun.py,sha256=apLSNEBZgUsQNPMUv072zJ1swqnm0dYVT5TqcIWTt6w,4201
+click/_winconsole.py,sha256=6YDu6Rq1Wxx4w9uinBMK2LHvP83aerZM9GQurlk3QDo,10010
+click/core.py,sha256=V6DJzastGhrC6WTDwV9MSLwcJUdX2Uf1ypmgkjBdn_Y,77650
+click/decorators.py,sha256=3TvEO_BkaHl7k6Eh1G5eC7JK4LKPdpFqH9JP0QDyTlM,11215
+click/exceptions.py,sha256=3pQAyyMFzx5A3eV0Y27WtDTyGogZRbrC6_o5DjjKBbw,8118
+click/formatting.py,sha256=Wb4gqFEpWaKPgAbOvnkCl8p-bEZx5KpM5ZSByhlnJNk,9281
+click/globals.py,sha256=ht7u2kUGI08pAarB4e4yC8Lkkxy6gJfRZyzxEj8EbWQ,1501
+click/parser.py,sha256=mFK-k58JtPpqO0AC36WAr0t5UfzEw1mvgVSyn7WCe9M,15691
+click/termui.py,sha256=G7QBEKIepRIGLvNdGwBTYiEtSImRxvTO_AglVpyHH2s,23998
+click/testing.py,sha256=EUEsDUqNXFgCLhZ0ZFOROpaVDA5I_rijwnNPE6qICgA,12854
+click/types.py,sha256=wuubik4VqgqAw5dvbYFkDt-zSAx97y9TQXuXcVaRyQA,25045
+click/utils.py,sha256=4VEcJ7iEHwjnFuzEuRtkT99o5VG3zqSD7Q2CVzv13WU,15940
diff --git a/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/WHEEL
new file mode 100644
index 0000000..ef99c6c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/top_level.txt
new file mode 100644
index 0000000..dca9a90
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click-7.1.2.dist-info/top_level.txt
@@ -0,0 +1 @@
+click
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/__init__.py b/python3-vckonline/lib/python3.8/site-packages/click/__init__.py
new file mode 100644
index 0000000..2b6008f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/__init__.py
@@ -0,0 +1,79 @@
+"""
+Click is a simple Python module inspired by the stdlib optparse to make
+writing command line scripts fun. Unlike other modules, it's based
+around a simple API that does not come with too much magic and is
+composable.
+"""
+from .core import Argument
+from .core import BaseCommand
+from .core import Command
+from .core import CommandCollection
+from .core import Context
+from .core import Group
+from .core import MultiCommand
+from .core import Option
+from .core import Parameter
+from .decorators import argument
+from .decorators import command
+from .decorators import confirmation_option
+from .decorators import group
+from .decorators import help_option
+from .decorators import make_pass_decorator
+from .decorators import option
+from .decorators import pass_context
+from .decorators import pass_obj
+from .decorators import password_option
+from .decorators import version_option
+from .exceptions import Abort
+from .exceptions import BadArgumentUsage
+from .exceptions import BadOptionUsage
+from .exceptions import BadParameter
+from .exceptions import ClickException
+from .exceptions import FileError
+from .exceptions import MissingParameter
+from .exceptions import NoSuchOption
+from .exceptions import UsageError
+from .formatting import HelpFormatter
+from .formatting import wrap_text
+from .globals import get_current_context
+from .parser import OptionParser
+from .termui import clear
+from .termui import confirm
+from .termui import echo_via_pager
+from .termui import edit
+from .termui import get_terminal_size
+from .termui import getchar
+from .termui import launch
+from .termui import pause
+from .termui import progressbar
+from .termui import prompt
+from .termui import secho
+from .termui import style
+from .termui import unstyle
+from .types import BOOL
+from .types import Choice
+from .types import DateTime
+from .types import File
+from .types import FLOAT
+from .types import FloatRange
+from .types import INT
+from .types import IntRange
+from .types import ParamType
+from .types import Path
+from .types import STRING
+from .types import Tuple
+from .types import UNPROCESSED
+from .types import UUID
+from .utils import echo
+from .utils import format_filename
+from .utils import get_app_dir
+from .utils import get_binary_stream
+from .utils import get_os_args
+from .utils import get_text_stream
+from .utils import open_file
+
+# Controls if click should emit the warning about the use of unicode
+# literals.
+disable_unicode_literals_warning = False
+
+__version__ = "7.1.2"
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diff --git a/python3-vckonline/lib/python3.8/site-packages/click/_bashcomplete.py b/python3-vckonline/lib/python3.8/site-packages/click/_bashcomplete.py
new file mode 100644
index 0000000..8bca244
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/_bashcomplete.py
@@ -0,0 +1,375 @@
+import copy
+import os
+import re
+
+from .core import Argument
+from .core import MultiCommand
+from .core import Option
+from .parser import split_arg_string
+from .types import Choice
+from .utils import echo
+
+try:
+    from collections import abc
+except ImportError:
+    import collections as abc
+
+WORDBREAK = "="
+
+# Note, only BASH version 4.4 and later have the nosort option.
+COMPLETION_SCRIPT_BASH = """
+%(complete_func)s() {
+    local IFS=$'\n'
+    COMPREPLY=( $( env COMP_WORDS="${COMP_WORDS[*]}" \\
+                   COMP_CWORD=$COMP_CWORD \\
+                   %(autocomplete_var)s=complete $1 ) )
+    return 0
+}
+
+%(complete_func)setup() {
+    local COMPLETION_OPTIONS=""
+    local BASH_VERSION_ARR=(${BASH_VERSION//./ })
+    # Only BASH version 4.4 and later have the nosort option.
+    if [ ${BASH_VERSION_ARR[0]} -gt 4 ] || ([ ${BASH_VERSION_ARR[0]} -eq 4 ] \
+&& [ ${BASH_VERSION_ARR[1]} -ge 4 ]); then
+        COMPLETION_OPTIONS="-o nosort"
+    fi
+
+    complete $COMPLETION_OPTIONS -F %(complete_func)s %(script_names)s
+}
+
+%(complete_func)setup
+"""
+
+COMPLETION_SCRIPT_ZSH = """
+#compdef %(script_names)s
+
+%(complete_func)s() {
+    local -a completions
+    local -a completions_with_descriptions
+    local -a response
+    (( ! $+commands[%(script_names)s] )) && return 1
+
+    response=("${(@f)$( env COMP_WORDS=\"${words[*]}\" \\
+                        COMP_CWORD=$((CURRENT-1)) \\
+                        %(autocomplete_var)s=\"complete_zsh\" \\
+                        %(script_names)s )}")
+
+    for key descr in ${(kv)response}; do
+      if [[ "$descr" == "_" ]]; then
+          completions+=("$key")
+      else
+          completions_with_descriptions+=("$key":"$descr")
+      fi
+    done
+
+    if [ -n "$completions_with_descriptions" ]; then
+        _describe -V unsorted completions_with_descriptions -U
+    fi
+
+    if [ -n "$completions" ]; then
+        compadd -U -V unsorted -a completions
+    fi
+    compstate[insert]="automenu"
+}
+
+compdef %(complete_func)s %(script_names)s
+"""
+
+COMPLETION_SCRIPT_FISH = (
+    "complete --no-files --command %(script_names)s --arguments"
+    ' "(env %(autocomplete_var)s=complete_fish'
+    " COMP_WORDS=(commandline -cp) COMP_CWORD=(commandline -t)"
+    ' %(script_names)s)"'
+)
+
+_completion_scripts = {
+    "bash": COMPLETION_SCRIPT_BASH,
+    "zsh": COMPLETION_SCRIPT_ZSH,
+    "fish": COMPLETION_SCRIPT_FISH,
+}
+
+_invalid_ident_char_re = re.compile(r"[^a-zA-Z0-9_]")
+
+
+def get_completion_script(prog_name, complete_var, shell):
+    cf_name = _invalid_ident_char_re.sub("", prog_name.replace("-", "_"))
+    script = _completion_scripts.get(shell, COMPLETION_SCRIPT_BASH)
+    return (
+        script
+        % {
+            "complete_func": "_{}_completion".format(cf_name),
+            "script_names": prog_name,
+            "autocomplete_var": complete_var,
+        }
+    ).strip() + ";"
+
+
+def resolve_ctx(cli, prog_name, args):
+    """Parse into a hierarchy of contexts. Contexts are connected
+    through the parent variable.
+
+    :param cli: command definition
+    :param prog_name: the program that is running
+    :param args: full list of args
+    :return: the final context/command parsed
+    """
+    ctx = cli.make_context(prog_name, args, resilient_parsing=True)
+    args = ctx.protected_args + ctx.args
+    while args:
+        if isinstance(ctx.command, MultiCommand):
+            if not ctx.command.chain:
+                cmd_name, cmd, args = ctx.command.resolve_command(ctx, args)
+                if cmd is None:
+                    return ctx
+                ctx = cmd.make_context(
+                    cmd_name, args, parent=ctx, resilient_parsing=True
+                )
+                args = ctx.protected_args + ctx.args
+            else:
+                # Walk chained subcommand contexts saving the last one.
+                while args:
+                    cmd_name, cmd, args = ctx.command.resolve_command(ctx, args)
+                    if cmd is None:
+                        return ctx
+                    sub_ctx = cmd.make_context(
+                        cmd_name,
+                        args,
+                        parent=ctx,
+                        allow_extra_args=True,
+                        allow_interspersed_args=False,
+                        resilient_parsing=True,
+                    )
+                    args = sub_ctx.args
+                ctx = sub_ctx
+                args = sub_ctx.protected_args + sub_ctx.args
+        else:
+            break
+    return ctx
+
+
+def start_of_option(param_str):
+    """
+    :param param_str: param_str to check
+    :return: whether or not this is the start of an option declaration
+        (i.e. starts "-" or "--")
+    """
+    return param_str and param_str[:1] == "-"
+
+
+def is_incomplete_option(all_args, cmd_param):
+    """
+    :param all_args: the full original list of args supplied
+    :param cmd_param: the current command paramter
+    :return: whether or not the last option declaration (i.e. starts
+        "-" or "--") is incomplete and corresponds to this cmd_param. In
+        other words whether this cmd_param option can still accept
+        values
+    """
+    if not isinstance(cmd_param, Option):
+        return False
+    if cmd_param.is_flag:
+        return False
+    last_option = None
+    for index, arg_str in enumerate(
+        reversed([arg for arg in all_args if arg != WORDBREAK])
+    ):
+        if index + 1 > cmd_param.nargs:
+            break
+        if start_of_option(arg_str):
+            last_option = arg_str
+
+    return True if last_option and last_option in cmd_param.opts else False
+
+
+def is_incomplete_argument(current_params, cmd_param):
+    """
+    :param current_params: the current params and values for this
+        argument as already entered
+    :param cmd_param: the current command parameter
+    :return: whether or not the last argument is incomplete and
+        corresponds to this cmd_param. In other words whether or not the
+        this cmd_param argument can still accept values
+    """
+    if not isinstance(cmd_param, Argument):
+        return False
+    current_param_values = current_params[cmd_param.name]
+    if current_param_values is None:
+        return True
+    if cmd_param.nargs == -1:
+        return True
+    if (
+        isinstance(current_param_values, abc.Iterable)
+        and cmd_param.nargs > 1
+        and len(current_param_values) < cmd_param.nargs
+    ):
+        return True
+    return False
+
+
+def get_user_autocompletions(ctx, args, incomplete, cmd_param):
+    """
+    :param ctx: context associated with the parsed command
+    :param args: full list of args
+    :param incomplete: the incomplete text to autocomplete
+    :param cmd_param: command definition
+    :return: all the possible user-specified completions for the param
+    """
+    results = []
+    if isinstance(cmd_param.type, Choice):
+        # Choices don't support descriptions.
+        results = [
+            (c, None) for c in cmd_param.type.choices if str(c).startswith(incomplete)
+        ]
+    elif cmd_param.autocompletion is not None:
+        dynamic_completions = cmd_param.autocompletion(
+            ctx=ctx, args=args, incomplete=incomplete
+        )
+        results = [
+            c if isinstance(c, tuple) else (c, None) for c in dynamic_completions
+        ]
+    return results
+
+
+def get_visible_commands_starting_with(ctx, starts_with):
+    """
+    :param ctx: context associated with the parsed command
+    :starts_with: string that visible commands must start with.
+    :return: all visible (not hidden) commands that start with starts_with.
+    """
+    for c in ctx.command.list_commands(ctx):
+        if c.startswith(starts_with):
+            command = ctx.command.get_command(ctx, c)
+            if not command.hidden:
+                yield command
+
+
+def add_subcommand_completions(ctx, incomplete, completions_out):
+    # Add subcommand completions.
+    if isinstance(ctx.command, MultiCommand):
+        completions_out.extend(
+            [
+                (c.name, c.get_short_help_str())
+                for c in get_visible_commands_starting_with(ctx, incomplete)
+            ]
+        )
+
+    # Walk up the context list and add any other completion
+    # possibilities from chained commands
+    while ctx.parent is not None:
+        ctx = ctx.parent
+        if isinstance(ctx.command, MultiCommand) and ctx.command.chain:
+            remaining_commands = [
+                c
+                for c in get_visible_commands_starting_with(ctx, incomplete)
+                if c.name not in ctx.protected_args
+            ]
+            completions_out.extend(
+                [(c.name, c.get_short_help_str()) for c in remaining_commands]
+            )
+
+
+def get_choices(cli, prog_name, args, incomplete):
+    """
+    :param cli: command definition
+    :param prog_name: the program that is running
+    :param args: full list of args
+    :param incomplete: the incomplete text to autocomplete
+    :return: all the possible completions for the incomplete
+    """
+    all_args = copy.deepcopy(args)
+
+    ctx = resolve_ctx(cli, prog_name, args)
+    if ctx is None:
+        return []
+
+    has_double_dash = "--" in all_args
+
+    # In newer versions of bash long opts with '='s are partitioned, but
+    # it's easier to parse without the '='
+    if start_of_option(incomplete) and WORDBREAK in incomplete:
+        partition_incomplete = incomplete.partition(WORDBREAK)
+        all_args.append(partition_incomplete[0])
+        incomplete = partition_incomplete[2]
+    elif incomplete == WORDBREAK:
+        incomplete = ""
+
+    completions = []
+    if not has_double_dash and start_of_option(incomplete):
+        # completions for partial options
+        for param in ctx.command.params:
+            if isinstance(param, Option) and not param.hidden:
+                param_opts = [
+                    param_opt
+                    for param_opt in param.opts + param.secondary_opts
+                    if param_opt not in all_args or param.multiple
+                ]
+                completions.extend(
+                    [(o, param.help) for o in param_opts if o.startswith(incomplete)]
+                )
+        return completions
+    # completion for option values from user supplied values
+    for param in ctx.command.params:
+        if is_incomplete_option(all_args, param):
+            return get_user_autocompletions(ctx, all_args, incomplete, param)
+    # completion for argument values from user supplied values
+    for param in ctx.command.params:
+        if is_incomplete_argument(ctx.params, param):
+            return get_user_autocompletions(ctx, all_args, incomplete, param)
+
+    add_subcommand_completions(ctx, incomplete, completions)
+    # Sort before returning so that proper ordering can be enforced in custom types.
+    return sorted(completions)
+
+
+def do_complete(cli, prog_name, include_descriptions):
+    cwords = split_arg_string(os.environ["COMP_WORDS"])
+    cword = int(os.environ["COMP_CWORD"])
+    args = cwords[1:cword]
+    try:
+        incomplete = cwords[cword]
+    except IndexError:
+        incomplete = ""
+
+    for item in get_choices(cli, prog_name, args, incomplete):
+        echo(item[0])
+        if include_descriptions:
+            # ZSH has trouble dealing with empty array parameters when
+            # returned from commands, use '_' to indicate no description
+            # is present.
+            echo(item[1] if item[1] else "_")
+
+    return True
+
+
+def do_complete_fish(cli, prog_name):
+    cwords = split_arg_string(os.environ["COMP_WORDS"])
+    incomplete = os.environ["COMP_CWORD"]
+    args = cwords[1:]
+
+    for item in get_choices(cli, prog_name, args, incomplete):
+        if item[1]:
+            echo("{arg}\t{desc}".format(arg=item[0], desc=item[1]))
+        else:
+            echo(item[0])
+
+    return True
+
+
+def bashcomplete(cli, prog_name, complete_var, complete_instr):
+    if "_" in complete_instr:
+        command, shell = complete_instr.split("_", 1)
+    else:
+        command = complete_instr
+        shell = "bash"
+
+    if command == "source":
+        echo(get_completion_script(prog_name, complete_var, shell))
+        return True
+    elif command == "complete":
+        if shell == "fish":
+            return do_complete_fish(cli, prog_name)
+        elif shell in {"bash", "zsh"}:
+            return do_complete(cli, prog_name, shell == "zsh")
+
+    return False
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/_compat.py b/python3-vckonline/lib/python3.8/site-packages/click/_compat.py
new file mode 100644
index 0000000..60cb115
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/_compat.py
@@ -0,0 +1,786 @@
+# flake8: noqa
+import codecs
+import io
+import os
+import re
+import sys
+from weakref import WeakKeyDictionary
+
+PY2 = sys.version_info[0] == 2
+CYGWIN = sys.platform.startswith("cygwin")
+MSYS2 = sys.platform.startswith("win") and ("GCC" in sys.version)
+# Determine local App Engine environment, per Google's own suggestion
+APP_ENGINE = "APPENGINE_RUNTIME" in os.environ and "Development/" in os.environ.get(
+    "SERVER_SOFTWARE", ""
+)
+WIN = sys.platform.startswith("win") and not APP_ENGINE and not MSYS2
+DEFAULT_COLUMNS = 80
+
+
+_ansi_re = re.compile(r"\033\[[;?0-9]*[a-zA-Z]")
+
+
+def get_filesystem_encoding():
+    return sys.getfilesystemencoding() or sys.getdefaultencoding()
+
+
+def _make_text_stream(
+    stream, encoding, errors, force_readable=False, force_writable=False
+):
+    if encoding is None:
+        encoding = get_best_encoding(stream)
+    if errors is None:
+        errors = "replace"
+    return _NonClosingTextIOWrapper(
+        stream,
+        encoding,
+        errors,
+        line_buffering=True,
+        force_readable=force_readable,
+        force_writable=force_writable,
+    )
+
+
+def is_ascii_encoding(encoding):
+    """Checks if a given encoding is ascii."""
+    try:
+        return codecs.lookup(encoding).name == "ascii"
+    except LookupError:
+        return False
+
+
+def get_best_encoding(stream):
+    """Returns the default stream encoding if not found."""
+    rv = getattr(stream, "encoding", None) or sys.getdefaultencoding()
+    if is_ascii_encoding(rv):
+        return "utf-8"
+    return rv
+
+
+class _NonClosingTextIOWrapper(io.TextIOWrapper):
+    def __init__(
+        self,
+        stream,
+        encoding,
+        errors,
+        force_readable=False,
+        force_writable=False,
+        **extra
+    ):
+        self._stream = stream = _FixupStream(stream, force_readable, force_writable)
+        io.TextIOWrapper.__init__(self, stream, encoding, errors, **extra)
+
+    # The io module is a place where the Python 3 text behavior
+    # was forced upon Python 2, so we need to unbreak
+    # it to look like Python 2.
+    if PY2:
+
+        def write(self, x):
+            if isinstance(x, str) or is_bytes(x):
+                try:
+                    self.flush()
+                except Exception:
+                    pass
+                return self.buffer.write(str(x))
+            return io.TextIOWrapper.write(self, x)
+
+        def writelines(self, lines):
+            for line in lines:
+                self.write(line)
+
+    def __del__(self):
+        try:
+            self.detach()
+        except Exception:
+            pass
+
+    def isatty(self):
+        # https://bitbucket.org/pypy/pypy/issue/1803
+        return self._stream.isatty()
+
+
+class _FixupStream(object):
+    """The new io interface needs more from streams than streams
+    traditionally implement.  As such, this fix-up code is necessary in
+    some circumstances.
+
+    The forcing of readable and writable flags are there because some tools
+    put badly patched objects on sys (one such offender are certain version
+    of jupyter notebook).
+    """
+
+    def __init__(self, stream, force_readable=False, force_writable=False):
+        self._stream = stream
+        self._force_readable = force_readable
+        self._force_writable = force_writable
+
+    def __getattr__(self, name):
+        return getattr(self._stream, name)
+
+    def read1(self, size):
+        f = getattr(self._stream, "read1", None)
+        if f is not None:
+            return f(size)
+        # We only dispatch to readline instead of read in Python 2 as we
+        # do not want cause problems with the different implementation
+        # of line buffering.
+        if PY2:
+            return self._stream.readline(size)
+        return self._stream.read(size)
+
+    def readable(self):
+        if self._force_readable:
+            return True
+        x = getattr(self._stream, "readable", None)
+        if x is not None:
+            return x()
+        try:
+            self._stream.read(0)
+        except Exception:
+            return False
+        return True
+
+    def writable(self):
+        if self._force_writable:
+            return True
+        x = getattr(self._stream, "writable", None)
+        if x is not None:
+            return x()
+        try:
+            self._stream.write("")
+        except Exception:
+            try:
+                self._stream.write(b"")
+            except Exception:
+                return False
+        return True
+
+    def seekable(self):
+        x = getattr(self._stream, "seekable", None)
+        if x is not None:
+            return x()
+        try:
+            self._stream.seek(self._stream.tell())
+        except Exception:
+            return False
+        return True
+
+
+if PY2:
+    text_type = unicode
+    raw_input = raw_input
+    string_types = (str, unicode)
+    int_types = (int, long)
+    iteritems = lambda x: x.iteritems()
+    range_type = xrange
+
+    def is_bytes(x):
+        return isinstance(x, (buffer, bytearray))
+
+    _identifier_re = re.compile(r"^[a-zA-Z_][a-zA-Z0-9_]*$")
+
+    # For Windows, we need to force stdout/stdin/stderr to binary if it's
+    # fetched for that.  This obviously is not the most correct way to do
+    # it as it changes global state.  Unfortunately, there does not seem to
+    # be a clear better way to do it as just reopening the file in binary
+    # mode does not change anything.
+    #
+    # An option would be to do what Python 3 does and to open the file as
+    # binary only, patch it back to the system, and then use a wrapper
+    # stream that converts newlines.  It's not quite clear what's the
+    # correct option here.
+    #
+    # This code also lives in _winconsole for the fallback to the console
+    # emulation stream.
+    #
+    # There are also Windows environments where the `msvcrt` module is not
+    # available (which is why we use try-catch instead of the WIN variable
+    # here), such as the Google App Engine development server on Windows. In
+    # those cases there is just nothing we can do.
+    def set_binary_mode(f):
+        return f
+
+    try:
+        import msvcrt
+    except ImportError:
+        pass
+    else:
+
+        def set_binary_mode(f):
+            try:
+                fileno = f.fileno()
+            except Exception:
+                pass
+            else:
+                msvcrt.setmode(fileno, os.O_BINARY)
+            return f
+
+    try:
+        import fcntl
+    except ImportError:
+        pass
+    else:
+
+        def set_binary_mode(f):
+            try:
+                fileno = f.fileno()
+            except Exception:
+                pass
+            else:
+                flags = fcntl.fcntl(fileno, fcntl.F_GETFL)
+                fcntl.fcntl(fileno, fcntl.F_SETFL, flags & ~os.O_NONBLOCK)
+            return f
+
+    def isidentifier(x):
+        return _identifier_re.search(x) is not None
+
+    def get_binary_stdin():
+        return set_binary_mode(sys.stdin)
+
+    def get_binary_stdout():
+        _wrap_std_stream("stdout")
+        return set_binary_mode(sys.stdout)
+
+    def get_binary_stderr():
+        _wrap_std_stream("stderr")
+        return set_binary_mode(sys.stderr)
+
+    def get_text_stdin(encoding=None, errors=None):
+        rv = _get_windows_console_stream(sys.stdin, encoding, errors)
+        if rv is not None:
+            return rv
+        return _make_text_stream(sys.stdin, encoding, errors, force_readable=True)
+
+    def get_text_stdout(encoding=None, errors=None):
+        _wrap_std_stream("stdout")
+        rv = _get_windows_console_stream(sys.stdout, encoding, errors)
+        if rv is not None:
+            return rv
+        return _make_text_stream(sys.stdout, encoding, errors, force_writable=True)
+
+    def get_text_stderr(encoding=None, errors=None):
+        _wrap_std_stream("stderr")
+        rv = _get_windows_console_stream(sys.stderr, encoding, errors)
+        if rv is not None:
+            return rv
+        return _make_text_stream(sys.stderr, encoding, errors, force_writable=True)
+
+    def filename_to_ui(value):
+        if isinstance(value, bytes):
+            value = value.decode(get_filesystem_encoding(), "replace")
+        return value
+
+
+else:
+    import io
+
+    text_type = str
+    raw_input = input
+    string_types = (str,)
+    int_types = (int,)
+    range_type = range
+    isidentifier = lambda x: x.isidentifier()
+    iteritems = lambda x: iter(x.items())
+
+    def is_bytes(x):
+        return isinstance(x, (bytes, memoryview, bytearray))
+
+    def _is_binary_reader(stream, default=False):
+        try:
+            return isinstance(stream.read(0), bytes)
+        except Exception:
+            return default
+            # This happens in some cases where the stream was already
+            # closed.  In this case, we assume the default.
+
+    def _is_binary_writer(stream, default=False):
+        try:
+            stream.write(b"")
+        except Exception:
+            try:
+                stream.write("")
+                return False
+            except Exception:
+                pass
+            return default
+        return True
+
+    def _find_binary_reader(stream):
+        # We need to figure out if the given stream is already binary.
+        # This can happen because the official docs recommend detaching
+        # the streams to get binary streams.  Some code might do this, so
+        # we need to deal with this case explicitly.
+        if _is_binary_reader(stream, False):
+            return stream
+
+        buf = getattr(stream, "buffer", None)
+
+        # Same situation here; this time we assume that the buffer is
+        # actually binary in case it's closed.
+        if buf is not None and _is_binary_reader(buf, True):
+            return buf
+
+    def _find_binary_writer(stream):
+        # We need to figure out if the given stream is already binary.
+        # This can happen because the official docs recommend detatching
+        # the streams to get binary streams.  Some code might do this, so
+        # we need to deal with this case explicitly.
+        if _is_binary_writer(stream, False):
+            return stream
+
+        buf = getattr(stream, "buffer", None)
+
+        # Same situation here; this time we assume that the buffer is
+        # actually binary in case it's closed.
+        if buf is not None and _is_binary_writer(buf, True):
+            return buf
+
+    def _stream_is_misconfigured(stream):
+        """A stream is misconfigured if its encoding is ASCII."""
+        # If the stream does not have an encoding set, we assume it's set
+        # to ASCII.  This appears to happen in certain unittest
+        # environments.  It's not quite clear what the correct behavior is
+        # but this at least will force Click to recover somehow.
+        return is_ascii_encoding(getattr(stream, "encoding", None) or "ascii")
+
+    def _is_compat_stream_attr(stream, attr, value):
+        """A stream attribute is compatible if it is equal to the
+        desired value or the desired value is unset and the attribute
+        has a value.
+        """
+        stream_value = getattr(stream, attr, None)
+        return stream_value == value or (value is None and stream_value is not None)
+
+    def _is_compatible_text_stream(stream, encoding, errors):
+        """Check if a stream's encoding and errors attributes are
+        compatible with the desired values.
+        """
+        return _is_compat_stream_attr(
+            stream, "encoding", encoding
+        ) and _is_compat_stream_attr(stream, "errors", errors)
+
+    def _force_correct_text_stream(
+        text_stream,
+        encoding,
+        errors,
+        is_binary,
+        find_binary,
+        force_readable=False,
+        force_writable=False,
+    ):
+        if is_binary(text_stream, False):
+            binary_reader = text_stream
+        else:
+            # If the stream looks compatible, and won't default to a
+            # misconfigured ascii encoding, return it as-is.
+            if _is_compatible_text_stream(text_stream, encoding, errors) and not (
+                encoding is None and _stream_is_misconfigured(text_stream)
+            ):
+                return text_stream
+
+            # Otherwise, get the underlying binary reader.
+            binary_reader = find_binary(text_stream)
+
+            # If that's not possible, silently use the original reader
+            # and get mojibake instead of exceptions.
+            if binary_reader is None:
+                return text_stream
+
+        # Default errors to replace instead of strict in order to get
+        # something that works.
+        if errors is None:
+            errors = "replace"
+
+        # Wrap the binary stream in a text stream with the correct
+        # encoding parameters.
+        return _make_text_stream(
+            binary_reader,
+            encoding,
+            errors,
+            force_readable=force_readable,
+            force_writable=force_writable,
+        )
+
+    def _force_correct_text_reader(text_reader, encoding, errors, force_readable=False):
+        return _force_correct_text_stream(
+            text_reader,
+            encoding,
+            errors,
+            _is_binary_reader,
+            _find_binary_reader,
+            force_readable=force_readable,
+        )
+
+    def _force_correct_text_writer(text_writer, encoding, errors, force_writable=False):
+        return _force_correct_text_stream(
+            text_writer,
+            encoding,
+            errors,
+            _is_binary_writer,
+            _find_binary_writer,
+            force_writable=force_writable,
+        )
+
+    def get_binary_stdin():
+        reader = _find_binary_reader(sys.stdin)
+        if reader is None:
+            raise RuntimeError("Was not able to determine binary stream for sys.stdin.")
+        return reader
+
+    def get_binary_stdout():
+        writer = _find_binary_writer(sys.stdout)
+        if writer is None:
+            raise RuntimeError(
+                "Was not able to determine binary stream for sys.stdout."
+            )
+        return writer
+
+    def get_binary_stderr():
+        writer = _find_binary_writer(sys.stderr)
+        if writer is None:
+            raise RuntimeError(
+                "Was not able to determine binary stream for sys.stderr."
+            )
+        return writer
+
+    def get_text_stdin(encoding=None, errors=None):
+        rv = _get_windows_console_stream(sys.stdin, encoding, errors)
+        if rv is not None:
+            return rv
+        return _force_correct_text_reader(
+            sys.stdin, encoding, errors, force_readable=True
+        )
+
+    def get_text_stdout(encoding=None, errors=None):
+        rv = _get_windows_console_stream(sys.stdout, encoding, errors)
+        if rv is not None:
+            return rv
+        return _force_correct_text_writer(
+            sys.stdout, encoding, errors, force_writable=True
+        )
+
+    def get_text_stderr(encoding=None, errors=None):
+        rv = _get_windows_console_stream(sys.stderr, encoding, errors)
+        if rv is not None:
+            return rv
+        return _force_correct_text_writer(
+            sys.stderr, encoding, errors, force_writable=True
+        )
+
+    def filename_to_ui(value):
+        if isinstance(value, bytes):
+            value = value.decode(get_filesystem_encoding(), "replace")
+        else:
+            value = value.encode("utf-8", "surrogateescape").decode("utf-8", "replace")
+        return value
+
+
+def get_streerror(e, default=None):
+    if hasattr(e, "strerror"):
+        msg = e.strerror
+    else:
+        if default is not None:
+            msg = default
+        else:
+            msg = str(e)
+    if isinstance(msg, bytes):
+        msg = msg.decode("utf-8", "replace")
+    return msg
+
+
+def _wrap_io_open(file, mode, encoding, errors):
+    """On Python 2, :func:`io.open` returns a text file wrapper that
+    requires passing ``unicode`` to ``write``. Need to open the file in
+    binary mode then wrap it in a subclass that can write ``str`` and
+    ``unicode``.
+
+    Also handles not passing ``encoding`` and ``errors`` in binary mode.
+    """
+    binary = "b" in mode
+
+    if binary:
+        kwargs = {}
+    else:
+        kwargs = {"encoding": encoding, "errors": errors}
+
+    if not PY2 or binary:
+        return io.open(file, mode, **kwargs)
+
+    f = io.open(file, "{}b".format(mode.replace("t", "")))
+    return _make_text_stream(f, **kwargs)
+
+
+def open_stream(filename, mode="r", encoding=None, errors="strict", atomic=False):
+    binary = "b" in mode
+
+    # Standard streams first.  These are simple because they don't need
+    # special handling for the atomic flag.  It's entirely ignored.
+    if filename == "-":
+        if any(m in mode for m in ["w", "a", "x"]):
+            if binary:
+                return get_binary_stdout(), False
+            return get_text_stdout(encoding=encoding, errors=errors), False
+        if binary:
+            return get_binary_stdin(), False
+        return get_text_stdin(encoding=encoding, errors=errors), False
+
+    # Non-atomic writes directly go out through the regular open functions.
+    if not atomic:
+        return _wrap_io_open(filename, mode, encoding, errors), True
+
+    # Some usability stuff for atomic writes
+    if "a" in mode:
+        raise ValueError(
+            "Appending to an existing file is not supported, because that"
+            " would involve an expensive `copy`-operation to a temporary"
+            " file. Open the file in normal `w`-mode and copy explicitly"
+            " if that's what you're after."
+        )
+    if "x" in mode:
+        raise ValueError("Use the `overwrite`-parameter instead.")
+    if "w" not in mode:
+        raise ValueError("Atomic writes only make sense with `w`-mode.")
+
+    # Atomic writes are more complicated.  They work by opening a file
+    # as a proxy in the same folder and then using the fdopen
+    # functionality to wrap it in a Python file.  Then we wrap it in an
+    # atomic file that moves the file over on close.
+    import errno
+    import random
+
+    try:
+        perm = os.stat(filename).st_mode
+    except OSError:
+        perm = None
+
+    flags = os.O_RDWR | os.O_CREAT | os.O_EXCL
+
+    if binary:
+        flags |= getattr(os, "O_BINARY", 0)
+
+    while True:
+        tmp_filename = os.path.join(
+            os.path.dirname(filename),
+            ".__atomic-write{:08x}".format(random.randrange(1 << 32)),
+        )
+        try:
+            fd = os.open(tmp_filename, flags, 0o666 if perm is None else perm)
+            break
+        except OSError as e:
+            if e.errno == errno.EEXIST or (
+                os.name == "nt"
+                and e.errno == errno.EACCES
+                and os.path.isdir(e.filename)
+                and os.access(e.filename, os.W_OK)
+            ):
+                continue
+            raise
+
+    if perm is not None:
+        os.chmod(tmp_filename, perm)  # in case perm includes bits in umask
+
+    f = _wrap_io_open(fd, mode, encoding, errors)
+    return _AtomicFile(f, tmp_filename, os.path.realpath(filename)), True
+
+
+# Used in a destructor call, needs extra protection from interpreter cleanup.
+if hasattr(os, "replace"):
+    _replace = os.replace
+    _can_replace = True
+else:
+    _replace = os.rename
+    _can_replace = not WIN
+
+
+class _AtomicFile(object):
+    def __init__(self, f, tmp_filename, real_filename):
+        self._f = f
+        self._tmp_filename = tmp_filename
+        self._real_filename = real_filename
+        self.closed = False
+
+    @property
+    def name(self):
+        return self._real_filename
+
+    def close(self, delete=False):
+        if self.closed:
+            return
+        self._f.close()
+        if not _can_replace:
+            try:
+                os.remove(self._real_filename)
+            except OSError:
+                pass
+        _replace(self._tmp_filename, self._real_filename)
+        self.closed = True
+
+    def __getattr__(self, name):
+        return getattr(self._f, name)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.close(delete=exc_type is not None)
+
+    def __repr__(self):
+        return repr(self._f)
+
+
+auto_wrap_for_ansi = None
+colorama = None
+get_winterm_size = None
+
+
+def strip_ansi(value):
+    return _ansi_re.sub("", value)
+
+
+def _is_jupyter_kernel_output(stream):
+    if WIN:
+        # TODO: Couldn't test on Windows, should't try to support until
+        # someone tests the details wrt colorama.
+        return
+
+    while isinstance(stream, (_FixupStream, _NonClosingTextIOWrapper)):
+        stream = stream._stream
+
+    return stream.__class__.__module__.startswith("ipykernel.")
+
+
+def should_strip_ansi(stream=None, color=None):
+    if color is None:
+        if stream is None:
+            stream = sys.stdin
+        return not isatty(stream) and not _is_jupyter_kernel_output(stream)
+    return not color
+
+
+# If we're on Windows, we provide transparent integration through
+# colorama.  This will make ANSI colors through the echo function
+# work automatically.
+if WIN:
+    # Windows has a smaller terminal
+    DEFAULT_COLUMNS = 79
+
+    from ._winconsole import _get_windows_console_stream, _wrap_std_stream
+
+    def _get_argv_encoding():
+        import locale
+
+        return locale.getpreferredencoding()
+
+    if PY2:
+
+        def raw_input(prompt=""):
+            sys.stderr.flush()
+            if prompt:
+                stdout = _default_text_stdout()
+                stdout.write(prompt)
+            stdin = _default_text_stdin()
+            return stdin.readline().rstrip("\r\n")
+
+    try:
+        import colorama
+    except ImportError:
+        pass
+    else:
+        _ansi_stream_wrappers = WeakKeyDictionary()
+
+        def auto_wrap_for_ansi(stream, color=None):
+            """This function wraps a stream so that calls through colorama
+            are issued to the win32 console API to recolor on demand.  It
+            also ensures to reset the colors if a write call is interrupted
+            to not destroy the console afterwards.
+            """
+            try:
+                cached = _ansi_stream_wrappers.get(stream)
+            except Exception:
+                cached = None
+            if cached is not None:
+                return cached
+            strip = should_strip_ansi(stream, color)
+            ansi_wrapper = colorama.AnsiToWin32(stream, strip=strip)
+            rv = ansi_wrapper.stream
+            _write = rv.write
+
+            def _safe_write(s):
+                try:
+                    return _write(s)
+                except:
+                    ansi_wrapper.reset_all()
+                    raise
+
+            rv.write = _safe_write
+            try:
+                _ansi_stream_wrappers[stream] = rv
+            except Exception:
+                pass
+            return rv
+
+        def get_winterm_size():
+            win = colorama.win32.GetConsoleScreenBufferInfo(
+                colorama.win32.STDOUT
+            ).srWindow
+            return win.Right - win.Left, win.Bottom - win.Top
+
+
+else:
+
+    def _get_argv_encoding():
+        return getattr(sys.stdin, "encoding", None) or get_filesystem_encoding()
+
+    _get_windows_console_stream = lambda *x: None
+    _wrap_std_stream = lambda *x: None
+
+
+def term_len(x):
+    return len(strip_ansi(x))
+
+
+def isatty(stream):
+    try:
+        return stream.isatty()
+    except Exception:
+        return False
+
+
+def _make_cached_stream_func(src_func, wrapper_func):
+    cache = WeakKeyDictionary()
+
+    def func():
+        stream = src_func()
+        try:
+            rv = cache.get(stream)
+        except Exception:
+            rv = None
+        if rv is not None:
+            return rv
+        rv = wrapper_func()
+        try:
+            stream = src_func()  # In case wrapper_func() modified the stream
+            cache[stream] = rv
+        except Exception:
+            pass
+        return rv
+
+    return func
+
+
+_default_text_stdin = _make_cached_stream_func(lambda: sys.stdin, get_text_stdin)
+_default_text_stdout = _make_cached_stream_func(lambda: sys.stdout, get_text_stdout)
+_default_text_stderr = _make_cached_stream_func(lambda: sys.stderr, get_text_stderr)
+
+
+binary_streams = {
+    "stdin": get_binary_stdin,
+    "stdout": get_binary_stdout,
+    "stderr": get_binary_stderr,
+}
+
+text_streams = {
+    "stdin": get_text_stdin,
+    "stdout": get_text_stdout,
+    "stderr": get_text_stderr,
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/_termui_impl.py b/python3-vckonline/lib/python3.8/site-packages/click/_termui_impl.py
new file mode 100644
index 0000000..88bec37
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/_termui_impl.py
@@ -0,0 +1,657 @@
+# -*- coding: utf-8 -*-
+"""
+This module contains implementations for the termui module. To keep the
+import time of Click down, some infrequently used functionality is
+placed in this module and only imported as needed.
+"""
+import contextlib
+import math
+import os
+import sys
+import time
+
+from ._compat import _default_text_stdout
+from ._compat import CYGWIN
+from ._compat import get_best_encoding
+from ._compat import int_types
+from ._compat import isatty
+from ._compat import open_stream
+from ._compat import range_type
+from ._compat import strip_ansi
+from ._compat import term_len
+from ._compat import WIN
+from .exceptions import ClickException
+from .utils import echo
+
+if os.name == "nt":
+    BEFORE_BAR = "\r"
+    AFTER_BAR = "\n"
+else:
+    BEFORE_BAR = "\r\033[?25l"
+    AFTER_BAR = "\033[?25h\n"
+
+
+def _length_hint(obj):
+    """Returns the length hint of an object."""
+    try:
+        return len(obj)
+    except (AttributeError, TypeError):
+        try:
+            get_hint = type(obj).__length_hint__
+        except AttributeError:
+            return None
+        try:
+            hint = get_hint(obj)
+        except TypeError:
+            return None
+        if hint is NotImplemented or not isinstance(hint, int_types) or hint < 0:
+            return None
+        return hint
+
+
+class ProgressBar(object):
+    def __init__(
+        self,
+        iterable,
+        length=None,
+        fill_char="#",
+        empty_char=" ",
+        bar_template="%(bar)s",
+        info_sep="  ",
+        show_eta=True,
+        show_percent=None,
+        show_pos=False,
+        item_show_func=None,
+        label=None,
+        file=None,
+        color=None,
+        width=30,
+    ):
+        self.fill_char = fill_char
+        self.empty_char = empty_char
+        self.bar_template = bar_template
+        self.info_sep = info_sep
+        self.show_eta = show_eta
+        self.show_percent = show_percent
+        self.show_pos = show_pos
+        self.item_show_func = item_show_func
+        self.label = label or ""
+        if file is None:
+            file = _default_text_stdout()
+        self.file = file
+        self.color = color
+        self.width = width
+        self.autowidth = width == 0
+
+        if length is None:
+            length = _length_hint(iterable)
+        if iterable is None:
+            if length is None:
+                raise TypeError("iterable or length is required")
+            iterable = range_type(length)
+        self.iter = iter(iterable)
+        self.length = length
+        self.length_known = length is not None
+        self.pos = 0
+        self.avg = []
+        self.start = self.last_eta = time.time()
+        self.eta_known = False
+        self.finished = False
+        self.max_width = None
+        self.entered = False
+        self.current_item = None
+        self.is_hidden = not isatty(self.file)
+        self._last_line = None
+        self.short_limit = 0.5
+
+    def __enter__(self):
+        self.entered = True
+        self.render_progress()
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.render_finish()
+
+    def __iter__(self):
+        if not self.entered:
+            raise RuntimeError("You need to use progress bars in a with block.")
+        self.render_progress()
+        return self.generator()
+
+    def __next__(self):
+        # Iteration is defined in terms of a generator function,
+        # returned by iter(self); use that to define next(). This works
+        # because `self.iter` is an iterable consumed by that generator,
+        # so it is re-entry safe. Calling `next(self.generator())`
+        # twice works and does "what you want".
+        return next(iter(self))
+
+    # Python 2 compat
+    next = __next__
+
+    def is_fast(self):
+        return time.time() - self.start <= self.short_limit
+
+    def render_finish(self):
+        if self.is_hidden or self.is_fast():
+            return
+        self.file.write(AFTER_BAR)
+        self.file.flush()
+
+    @property
+    def pct(self):
+        if self.finished:
+            return 1.0
+        return min(self.pos / (float(self.length) or 1), 1.0)
+
+    @property
+    def time_per_iteration(self):
+        if not self.avg:
+            return 0.0
+        return sum(self.avg) / float(len(self.avg))
+
+    @property
+    def eta(self):
+        if self.length_known and not self.finished:
+            return self.time_per_iteration * (self.length - self.pos)
+        return 0.0
+
+    def format_eta(self):
+        if self.eta_known:
+            t = int(self.eta)
+            seconds = t % 60
+            t //= 60
+            minutes = t % 60
+            t //= 60
+            hours = t % 24
+            t //= 24
+            if t > 0:
+                return "{}d {:02}:{:02}:{:02}".format(t, hours, minutes, seconds)
+            else:
+                return "{:02}:{:02}:{:02}".format(hours, minutes, seconds)
+        return ""
+
+    def format_pos(self):
+        pos = str(self.pos)
+        if self.length_known:
+            pos += "/{}".format(self.length)
+        return pos
+
+    def format_pct(self):
+        return "{: 4}%".format(int(self.pct * 100))[1:]
+
+    def format_bar(self):
+        if self.length_known:
+            bar_length = int(self.pct * self.width)
+            bar = self.fill_char * bar_length
+            bar += self.empty_char * (self.width - bar_length)
+        elif self.finished:
+            bar = self.fill_char * self.width
+        else:
+            bar = list(self.empty_char * (self.width or 1))
+            if self.time_per_iteration != 0:
+                bar[
+                    int(
+                        (math.cos(self.pos * self.time_per_iteration) / 2.0 + 0.5)
+                        * self.width
+                    )
+                ] = self.fill_char
+            bar = "".join(bar)
+        return bar
+
+    def format_progress_line(self):
+        show_percent = self.show_percent
+
+        info_bits = []
+        if self.length_known and show_percent is None:
+            show_percent = not self.show_pos
+
+        if self.show_pos:
+            info_bits.append(self.format_pos())
+        if show_percent:
+            info_bits.append(self.format_pct())
+        if self.show_eta and self.eta_known and not self.finished:
+            info_bits.append(self.format_eta())
+        if self.item_show_func is not None:
+            item_info = self.item_show_func(self.current_item)
+            if item_info is not None:
+                info_bits.append(item_info)
+
+        return (
+            self.bar_template
+            % {
+                "label": self.label,
+                "bar": self.format_bar(),
+                "info": self.info_sep.join(info_bits),
+            }
+        ).rstrip()
+
+    def render_progress(self):
+        from .termui import get_terminal_size
+
+        if self.is_hidden:
+            return
+
+        buf = []
+        # Update width in case the terminal has been resized
+        if self.autowidth:
+            old_width = self.width
+            self.width = 0
+            clutter_length = term_len(self.format_progress_line())
+            new_width = max(0, get_terminal_size()[0] - clutter_length)
+            if new_width < old_width:
+                buf.append(BEFORE_BAR)
+                buf.append(" " * self.max_width)
+                self.max_width = new_width
+            self.width = new_width
+
+        clear_width = self.width
+        if self.max_width is not None:
+            clear_width = self.max_width
+
+        buf.append(BEFORE_BAR)
+        line = self.format_progress_line()
+        line_len = term_len(line)
+        if self.max_width is None or self.max_width < line_len:
+            self.max_width = line_len
+
+        buf.append(line)
+        buf.append(" " * (clear_width - line_len))
+        line = "".join(buf)
+        # Render the line only if it changed.
+
+        if line != self._last_line and not self.is_fast():
+            self._last_line = line
+            echo(line, file=self.file, color=self.color, nl=False)
+            self.file.flush()
+
+    def make_step(self, n_steps):
+        self.pos += n_steps
+        if self.length_known and self.pos >= self.length:
+            self.finished = True
+
+        if (time.time() - self.last_eta) < 1.0:
+            return
+
+        self.last_eta = time.time()
+
+        # self.avg is a rolling list of length <= 7 of steps where steps are
+        # defined as time elapsed divided by the total progress through
+        # self.length.
+        if self.pos:
+            step = (time.time() - self.start) / self.pos
+        else:
+            step = time.time() - self.start
+
+        self.avg = self.avg[-6:] + [step]
+
+        self.eta_known = self.length_known
+
+    def update(self, n_steps):
+        self.make_step(n_steps)
+        self.render_progress()
+
+    def finish(self):
+        self.eta_known = 0
+        self.current_item = None
+        self.finished = True
+
+    def generator(self):
+        """Return a generator which yields the items added to the bar
+        during construction, and updates the progress bar *after* the
+        yielded block returns.
+        """
+        # WARNING: the iterator interface for `ProgressBar` relies on
+        # this and only works because this is a simple generator which
+        # doesn't create or manage additional state. If this function
+        # changes, the impact should be evaluated both against
+        # `iter(bar)` and `next(bar)`. `next()` in particular may call
+        # `self.generator()` repeatedly, and this must remain safe in
+        # order for that interface to work.
+        if not self.entered:
+            raise RuntimeError("You need to use progress bars in a with block.")
+
+        if self.is_hidden:
+            for rv in self.iter:
+                yield rv
+        else:
+            for rv in self.iter:
+                self.current_item = rv
+                yield rv
+                self.update(1)
+            self.finish()
+            self.render_progress()
+
+
+def pager(generator, color=None):
+    """Decide what method to use for paging through text."""
+    stdout = _default_text_stdout()
+    if not isatty(sys.stdin) or not isatty(stdout):
+        return _nullpager(stdout, generator, color)
+    pager_cmd = (os.environ.get("PAGER", None) or "").strip()
+    if pager_cmd:
+        if WIN:
+            return _tempfilepager(generator, pager_cmd, color)
+        return _pipepager(generator, pager_cmd, color)
+    if os.environ.get("TERM") in ("dumb", "emacs"):
+        return _nullpager(stdout, generator, color)
+    if WIN or sys.platform.startswith("os2"):
+        return _tempfilepager(generator, "more <", color)
+    if hasattr(os, "system") and os.system("(less) 2>/dev/null") == 0:
+        return _pipepager(generator, "less", color)
+
+    import tempfile
+
+    fd, filename = tempfile.mkstemp()
+    os.close(fd)
+    try:
+        if hasattr(os, "system") and os.system('more "{}"'.format(filename)) == 0:
+            return _pipepager(generator, "more", color)
+        return _nullpager(stdout, generator, color)
+    finally:
+        os.unlink(filename)
+
+
+def _pipepager(generator, cmd, color):
+    """Page through text by feeding it to another program.  Invoking a
+    pager through this might support colors.
+    """
+    import subprocess
+
+    env = dict(os.environ)
+
+    # If we're piping to less we might support colors under the
+    # condition that
+    cmd_detail = cmd.rsplit("/", 1)[-1].split()
+    if color is None and cmd_detail[0] == "less":
+        less_flags = "{}{}".format(os.environ.get("LESS", ""), " ".join(cmd_detail[1:]))
+        if not less_flags:
+            env["LESS"] = "-R"
+            color = True
+        elif "r" in less_flags or "R" in less_flags:
+            color = True
+
+    c = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE, env=env)
+    encoding = get_best_encoding(c.stdin)
+    try:
+        for text in generator:
+            if not color:
+                text = strip_ansi(text)
+
+            c.stdin.write(text.encode(encoding, "replace"))
+    except (IOError, KeyboardInterrupt):
+        pass
+    else:
+        c.stdin.close()
+
+    # Less doesn't respect ^C, but catches it for its own UI purposes (aborting
+    # search or other commands inside less).
+    #
+    # That means when the user hits ^C, the parent process (click) terminates,
+    # but less is still alive, paging the output and messing up the terminal.
+    #
+    # If the user wants to make the pager exit on ^C, they should set
+    # `LESS='-K'`. It's not our decision to make.
+    while True:
+        try:
+            c.wait()
+        except KeyboardInterrupt:
+            pass
+        else:
+            break
+
+
+def _tempfilepager(generator, cmd, color):
+    """Page through text by invoking a program on a temporary file."""
+    import tempfile
+
+    filename = tempfile.mktemp()
+    # TODO: This never terminates if the passed generator never terminates.
+    text = "".join(generator)
+    if not color:
+        text = strip_ansi(text)
+    encoding = get_best_encoding(sys.stdout)
+    with open_stream(filename, "wb")[0] as f:
+        f.write(text.encode(encoding))
+    try:
+        os.system('{} "{}"'.format(cmd, filename))
+    finally:
+        os.unlink(filename)
+
+
+def _nullpager(stream, generator, color):
+    """Simply print unformatted text.  This is the ultimate fallback."""
+    for text in generator:
+        if not color:
+            text = strip_ansi(text)
+        stream.write(text)
+
+
+class Editor(object):
+    def __init__(self, editor=None, env=None, require_save=True, extension=".txt"):
+        self.editor = editor
+        self.env = env
+        self.require_save = require_save
+        self.extension = extension
+
+    def get_editor(self):
+        if self.editor is not None:
+            return self.editor
+        for key in "VISUAL", "EDITOR":
+            rv = os.environ.get(key)
+            if rv:
+                return rv
+        if WIN:
+            return "notepad"
+        for editor in "sensible-editor", "vim", "nano":
+            if os.system("which {} >/dev/null 2>&1".format(editor)) == 0:
+                return editor
+        return "vi"
+
+    def edit_file(self, filename):
+        import subprocess
+
+        editor = self.get_editor()
+        if self.env:
+            environ = os.environ.copy()
+            environ.update(self.env)
+        else:
+            environ = None
+        try:
+            c = subprocess.Popen(
+                '{} "{}"'.format(editor, filename), env=environ, shell=True,
+            )
+            exit_code = c.wait()
+            if exit_code != 0:
+                raise ClickException("{}: Editing failed!".format(editor))
+        except OSError as e:
+            raise ClickException("{}: Editing failed: {}".format(editor, e))
+
+    def edit(self, text):
+        import tempfile
+
+        text = text or ""
+        if text and not text.endswith("\n"):
+            text += "\n"
+
+        fd, name = tempfile.mkstemp(prefix="editor-", suffix=self.extension)
+        try:
+            if WIN:
+                encoding = "utf-8-sig"
+                text = text.replace("\n", "\r\n")
+            else:
+                encoding = "utf-8"
+            text = text.encode(encoding)
+
+            f = os.fdopen(fd, "wb")
+            f.write(text)
+            f.close()
+            timestamp = os.path.getmtime(name)
+
+            self.edit_file(name)
+
+            if self.require_save and os.path.getmtime(name) == timestamp:
+                return None
+
+            f = open(name, "rb")
+            try:
+                rv = f.read()
+            finally:
+                f.close()
+            return rv.decode("utf-8-sig").replace("\r\n", "\n")
+        finally:
+            os.unlink(name)
+
+
+def open_url(url, wait=False, locate=False):
+    import subprocess
+
+    def _unquote_file(url):
+        try:
+            import urllib
+        except ImportError:
+            import urllib
+        if url.startswith("file://"):
+            url = urllib.unquote(url[7:])
+        return url
+
+    if sys.platform == "darwin":
+        args = ["open"]
+        if wait:
+            args.append("-W")
+        if locate:
+            args.append("-R")
+        args.append(_unquote_file(url))
+        null = open("/dev/null", "w")
+        try:
+            return subprocess.Popen(args, stderr=null).wait()
+        finally:
+            null.close()
+    elif WIN:
+        if locate:
+            url = _unquote_file(url)
+            args = 'explorer /select,"{}"'.format(_unquote_file(url.replace('"', "")))
+        else:
+            args = 'start {} "" "{}"'.format(
+                "/WAIT" if wait else "", url.replace('"', "")
+            )
+        return os.system(args)
+    elif CYGWIN:
+        if locate:
+            url = _unquote_file(url)
+            args = 'cygstart "{}"'.format(os.path.dirname(url).replace('"', ""))
+        else:
+            args = 'cygstart {} "{}"'.format("-w" if wait else "", url.replace('"', ""))
+        return os.system(args)
+
+    try:
+        if locate:
+            url = os.path.dirname(_unquote_file(url)) or "."
+        else:
+            url = _unquote_file(url)
+        c = subprocess.Popen(["xdg-open", url])
+        if wait:
+            return c.wait()
+        return 0
+    except OSError:
+        if url.startswith(("http://", "https://")) and not locate and not wait:
+            import webbrowser
+
+            webbrowser.open(url)
+            return 0
+        return 1
+
+
+def _translate_ch_to_exc(ch):
+    if ch == u"\x03":
+        raise KeyboardInterrupt()
+    if ch == u"\x04" and not WIN:  # Unix-like, Ctrl+D
+        raise EOFError()
+    if ch == u"\x1a" and WIN:  # Windows, Ctrl+Z
+        raise EOFError()
+
+
+if WIN:
+    import msvcrt
+
+    @contextlib.contextmanager
+    def raw_terminal():
+        yield
+
+    def getchar(echo):
+        # The function `getch` will return a bytes object corresponding to
+        # the pressed character. Since Windows 10 build 1803, it will also
+        # return \x00 when called a second time after pressing a regular key.
+        #
+        # `getwch` does not share this probably-bugged behavior. Moreover, it
+        # returns a Unicode object by default, which is what we want.
+        #
+        # Either of these functions will return \x00 or \xe0 to indicate
+        # a special key, and you need to call the same function again to get
+        # the "rest" of the code. The fun part is that \u00e0 is
+        # "latin small letter a with grave", so if you type that on a French
+        # keyboard, you _also_ get a \xe0.
+        # E.g., consider the Up arrow. This returns \xe0 and then \x48. The
+        # resulting Unicode string reads as "a with grave" + "capital H".
+        # This is indistinguishable from when the user actually types
+        # "a with grave" and then "capital H".
+        #
+        # When \xe0 is returned, we assume it's part of a special-key sequence
+        # and call `getwch` again, but that means that when the user types
+        # the \u00e0 character, `getchar` doesn't return until a second
+        # character is typed.
+        # The alternative is returning immediately, but that would mess up
+        # cross-platform handling of arrow keys and others that start with
+        # \xe0. Another option is using `getch`, but then we can't reliably
+        # read non-ASCII characters, because return values of `getch` are
+        # limited to the current 8-bit codepage.
+        #
+        # Anyway, Click doesn't claim to do this Right(tm), and using `getwch`
+        # is doing the right thing in more situations than with `getch`.
+        if echo:
+            func = msvcrt.getwche
+        else:
+            func = msvcrt.getwch
+
+        rv = func()
+        if rv in (u"\x00", u"\xe0"):
+            # \x00 and \xe0 are control characters that indicate special key,
+            # see above.
+            rv += func()
+        _translate_ch_to_exc(rv)
+        return rv
+
+
+else:
+    import tty
+    import termios
+
+    @contextlib.contextmanager
+    def raw_terminal():
+        if not isatty(sys.stdin):
+            f = open("/dev/tty")
+            fd = f.fileno()
+        else:
+            fd = sys.stdin.fileno()
+            f = None
+        try:
+            old_settings = termios.tcgetattr(fd)
+            try:
+                tty.setraw(fd)
+                yield fd
+            finally:
+                termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
+                sys.stdout.flush()
+                if f is not None:
+                    f.close()
+        except termios.error:
+            pass
+
+    def getchar(echo):
+        with raw_terminal() as fd:
+            ch = os.read(fd, 32)
+            ch = ch.decode(get_best_encoding(sys.stdin), "replace")
+            if echo and isatty(sys.stdout):
+                sys.stdout.write(ch)
+            _translate_ch_to_exc(ch)
+            return ch
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/_textwrap.py b/python3-vckonline/lib/python3.8/site-packages/click/_textwrap.py
new file mode 100644
index 0000000..6959087
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/_textwrap.py
@@ -0,0 +1,37 @@
+import textwrap
+from contextlib import contextmanager
+
+
+class TextWrapper(textwrap.TextWrapper):
+    def _handle_long_word(self, reversed_chunks, cur_line, cur_len, width):
+        space_left = max(width - cur_len, 1)
+
+        if self.break_long_words:
+            last = reversed_chunks[-1]
+            cut = last[:space_left]
+            res = last[space_left:]
+            cur_line.append(cut)
+            reversed_chunks[-1] = res
+        elif not cur_line:
+            cur_line.append(reversed_chunks.pop())
+
+    @contextmanager
+    def extra_indent(self, indent):
+        old_initial_indent = self.initial_indent
+        old_subsequent_indent = self.subsequent_indent
+        self.initial_indent += indent
+        self.subsequent_indent += indent
+        try:
+            yield
+        finally:
+            self.initial_indent = old_initial_indent
+            self.subsequent_indent = old_subsequent_indent
+
+    def indent_only(self, text):
+        rv = []
+        for idx, line in enumerate(text.splitlines()):
+            indent = self.initial_indent
+            if idx > 0:
+                indent = self.subsequent_indent
+            rv.append(indent + line)
+        return "\n".join(rv)
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/_unicodefun.py b/python3-vckonline/lib/python3.8/site-packages/click/_unicodefun.py
new file mode 100644
index 0000000..781c365
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/_unicodefun.py
@@ -0,0 +1,131 @@
+import codecs
+import os
+import sys
+
+from ._compat import PY2
+
+
+def _find_unicode_literals_frame():
+    import __future__
+
+    if not hasattr(sys, "_getframe"):  # not all Python implementations have it
+        return 0
+    frm = sys._getframe(1)
+    idx = 1
+    while frm is not None:
+        if frm.f_globals.get("__name__", "").startswith("click."):
+            frm = frm.f_back
+            idx += 1
+        elif frm.f_code.co_flags & __future__.unicode_literals.compiler_flag:
+            return idx
+        else:
+            break
+    return 0
+
+
+def _check_for_unicode_literals():
+    if not __debug__:
+        return
+
+    from . import disable_unicode_literals_warning
+
+    if not PY2 or disable_unicode_literals_warning:
+        return
+    bad_frame = _find_unicode_literals_frame()
+    if bad_frame <= 0:
+        return
+    from warnings import warn
+
+    warn(
+        Warning(
+            "Click detected the use of the unicode_literals __future__"
+            " import. This is heavily discouraged because it can"
+            " introduce subtle bugs in your code. You should instead"
+            ' use explicit u"" literals for your unicode strings. For'
+            " more information see"
+            " https://click.palletsprojects.com/python3/"
+        ),
+        stacklevel=bad_frame,
+    )
+
+
+def _verify_python3_env():
+    """Ensures that the environment is good for unicode on Python 3."""
+    if PY2:
+        return
+    try:
+        import locale
+
+        fs_enc = codecs.lookup(locale.getpreferredencoding()).name
+    except Exception:
+        fs_enc = "ascii"
+    if fs_enc != "ascii":
+        return
+
+    extra = ""
+    if os.name == "posix":
+        import subprocess
+
+        try:
+            rv = subprocess.Popen(
+                ["locale", "-a"], stdout=subprocess.PIPE, stderr=subprocess.PIPE
+            ).communicate()[0]
+        except OSError:
+            rv = b""
+        good_locales = set()
+        has_c_utf8 = False
+
+        # Make sure we're operating on text here.
+        if isinstance(rv, bytes):
+            rv = rv.decode("ascii", "replace")
+
+        for line in rv.splitlines():
+            locale = line.strip()
+            if locale.lower().endswith((".utf-8", ".utf8")):
+                good_locales.add(locale)
+                if locale.lower() in ("c.utf8", "c.utf-8"):
+                    has_c_utf8 = True
+
+        extra += "\n\n"
+        if not good_locales:
+            extra += (
+                "Additional information: on this system no suitable"
+                " UTF-8 locales were discovered. This most likely"
+                " requires resolving by reconfiguring the locale"
+                " system."
+            )
+        elif has_c_utf8:
+            extra += (
+                "This system supports the C.UTF-8 locale which is"
+                " recommended. You might be able to resolve your issue"
+                " by exporting the following environment variables:\n\n"
+                "    export LC_ALL=C.UTF-8\n"
+                "    export LANG=C.UTF-8"
+            )
+        else:
+            extra += (
+                "This system lists a couple of UTF-8 supporting locales"
+                " that you can pick from. The following suitable"
+                " locales were discovered: {}".format(", ".join(sorted(good_locales)))
+            )
+
+        bad_locale = None
+        for locale in os.environ.get("LC_ALL"), os.environ.get("LANG"):
+            if locale and locale.lower().endswith((".utf-8", ".utf8")):
+                bad_locale = locale
+            if locale is not None:
+                break
+        if bad_locale is not None:
+            extra += (
+                "\n\nClick discovered that you exported a UTF-8 locale"
+                " but the locale system could not pick up from it"
+                " because it does not exist. The exported locale is"
+                " '{}' but it is not supported".format(bad_locale)
+            )
+
+    raise RuntimeError(
+        "Click will abort further execution because Python 3 was"
+        " configured to use ASCII as encoding for the environment."
+        " Consult https://click.palletsprojects.com/python3/ for"
+        " mitigation steps.{}".format(extra)
+    )
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/_winconsole.py b/python3-vckonline/lib/python3.8/site-packages/click/_winconsole.py
new file mode 100644
index 0000000..b6c4274
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/_winconsole.py
@@ -0,0 +1,370 @@
+# -*- coding: utf-8 -*-
+# This module is based on the excellent work by Adam Bartoš who
+# provided a lot of what went into the implementation here in
+# the discussion to issue1602 in the Python bug tracker.
+#
+# There are some general differences in regards to how this works
+# compared to the original patches as we do not need to patch
+# the entire interpreter but just work in our little world of
+# echo and prmopt.
+import ctypes
+import io
+import os
+import sys
+import time
+import zlib
+from ctypes import byref
+from ctypes import c_char
+from ctypes import c_char_p
+from ctypes import c_int
+from ctypes import c_ssize_t
+from ctypes import c_ulong
+from ctypes import c_void_p
+from ctypes import POINTER
+from ctypes import py_object
+from ctypes import windll
+from ctypes import WinError
+from ctypes import WINFUNCTYPE
+from ctypes.wintypes import DWORD
+from ctypes.wintypes import HANDLE
+from ctypes.wintypes import LPCWSTR
+from ctypes.wintypes import LPWSTR
+
+import msvcrt
+
+from ._compat import _NonClosingTextIOWrapper
+from ._compat import PY2
+from ._compat import text_type
+
+try:
+    from ctypes import pythonapi
+
+    PyObject_GetBuffer = pythonapi.PyObject_GetBuffer
+    PyBuffer_Release = pythonapi.PyBuffer_Release
+except ImportError:
+    pythonapi = None
+
+
+c_ssize_p = POINTER(c_ssize_t)
+
+kernel32 = windll.kernel32
+GetStdHandle = kernel32.GetStdHandle
+ReadConsoleW = kernel32.ReadConsoleW
+WriteConsoleW = kernel32.WriteConsoleW
+GetConsoleMode = kernel32.GetConsoleMode
+GetLastError = kernel32.GetLastError
+GetCommandLineW = WINFUNCTYPE(LPWSTR)(("GetCommandLineW", windll.kernel32))
+CommandLineToArgvW = WINFUNCTYPE(POINTER(LPWSTR), LPCWSTR, POINTER(c_int))(
+    ("CommandLineToArgvW", windll.shell32)
+)
+LocalFree = WINFUNCTYPE(ctypes.c_void_p, ctypes.c_void_p)(
+    ("LocalFree", windll.kernel32)
+)
+
+
+STDIN_HANDLE = GetStdHandle(-10)
+STDOUT_HANDLE = GetStdHandle(-11)
+STDERR_HANDLE = GetStdHandle(-12)
+
+
+PyBUF_SIMPLE = 0
+PyBUF_WRITABLE = 1
+
+ERROR_SUCCESS = 0
+ERROR_NOT_ENOUGH_MEMORY = 8
+ERROR_OPERATION_ABORTED = 995
+
+STDIN_FILENO = 0
+STDOUT_FILENO = 1
+STDERR_FILENO = 2
+
+EOF = b"\x1a"
+MAX_BYTES_WRITTEN = 32767
+
+
+class Py_buffer(ctypes.Structure):
+    _fields_ = [
+        ("buf", c_void_p),
+        ("obj", py_object),
+        ("len", c_ssize_t),
+        ("itemsize", c_ssize_t),
+        ("readonly", c_int),
+        ("ndim", c_int),
+        ("format", c_char_p),
+        ("shape", c_ssize_p),
+        ("strides", c_ssize_p),
+        ("suboffsets", c_ssize_p),
+        ("internal", c_void_p),
+    ]
+
+    if PY2:
+        _fields_.insert(-1, ("smalltable", c_ssize_t * 2))
+
+
+# On PyPy we cannot get buffers so our ability to operate here is
+# serverly limited.
+if pythonapi is None:
+    get_buffer = None
+else:
+
+    def get_buffer(obj, writable=False):
+        buf = Py_buffer()
+        flags = PyBUF_WRITABLE if writable else PyBUF_SIMPLE
+        PyObject_GetBuffer(py_object(obj), byref(buf), flags)
+        try:
+            buffer_type = c_char * buf.len
+            return buffer_type.from_address(buf.buf)
+        finally:
+            PyBuffer_Release(byref(buf))
+
+
+class _WindowsConsoleRawIOBase(io.RawIOBase):
+    def __init__(self, handle):
+        self.handle = handle
+
+    def isatty(self):
+        io.RawIOBase.isatty(self)
+        return True
+
+
+class _WindowsConsoleReader(_WindowsConsoleRawIOBase):
+    def readable(self):
+        return True
+
+    def readinto(self, b):
+        bytes_to_be_read = len(b)
+        if not bytes_to_be_read:
+            return 0
+        elif bytes_to_be_read % 2:
+            raise ValueError(
+                "cannot read odd number of bytes from UTF-16-LE encoded console"
+            )
+
+        buffer = get_buffer(b, writable=True)
+        code_units_to_be_read = bytes_to_be_read // 2
+        code_units_read = c_ulong()
+
+        rv = ReadConsoleW(
+            HANDLE(self.handle),
+            buffer,
+            code_units_to_be_read,
+            byref(code_units_read),
+            None,
+        )
+        if GetLastError() == ERROR_OPERATION_ABORTED:
+            # wait for KeyboardInterrupt
+            time.sleep(0.1)
+        if not rv:
+            raise OSError("Windows error: {}".format(GetLastError()))
+
+        if buffer[0] == EOF:
+            return 0
+        return 2 * code_units_read.value
+
+
+class _WindowsConsoleWriter(_WindowsConsoleRawIOBase):
+    def writable(self):
+        return True
+
+    @staticmethod
+    def _get_error_message(errno):
+        if errno == ERROR_SUCCESS:
+            return "ERROR_SUCCESS"
+        elif errno == ERROR_NOT_ENOUGH_MEMORY:
+            return "ERROR_NOT_ENOUGH_MEMORY"
+        return "Windows error {}".format(errno)
+
+    def write(self, b):
+        bytes_to_be_written = len(b)
+        buf = get_buffer(b)
+        code_units_to_be_written = min(bytes_to_be_written, MAX_BYTES_WRITTEN) // 2
+        code_units_written = c_ulong()
+
+        WriteConsoleW(
+            HANDLE(self.handle),
+            buf,
+            code_units_to_be_written,
+            byref(code_units_written),
+            None,
+        )
+        bytes_written = 2 * code_units_written.value
+
+        if bytes_written == 0 and bytes_to_be_written > 0:
+            raise OSError(self._get_error_message(GetLastError()))
+        return bytes_written
+
+
+class ConsoleStream(object):
+    def __init__(self, text_stream, byte_stream):
+        self._text_stream = text_stream
+        self.buffer = byte_stream
+
+    @property
+    def name(self):
+        return self.buffer.name
+
+    def write(self, x):
+        if isinstance(x, text_type):
+            return self._text_stream.write(x)
+        try:
+            self.flush()
+        except Exception:
+            pass
+        return self.buffer.write(x)
+
+    def writelines(self, lines):
+        for line in lines:
+            self.write(line)
+
+    def __getattr__(self, name):
+        return getattr(self._text_stream, name)
+
+    def isatty(self):
+        return self.buffer.isatty()
+
+    def __repr__(self):
+        return "<ConsoleStream name={!r} encoding={!r}>".format(
+            self.name, self.encoding
+        )
+
+
+class WindowsChunkedWriter(object):
+    """
+    Wraps a stream (such as stdout), acting as a transparent proxy for all
+    attribute access apart from method 'write()' which we wrap to write in
+    limited chunks due to a Windows limitation on binary console streams.
+    """
+
+    def __init__(self, wrapped):
+        # double-underscore everything to prevent clashes with names of
+        # attributes on the wrapped stream object.
+        self.__wrapped = wrapped
+
+    def __getattr__(self, name):
+        return getattr(self.__wrapped, name)
+
+    def write(self, text):
+        total_to_write = len(text)
+        written = 0
+
+        while written < total_to_write:
+            to_write = min(total_to_write - written, MAX_BYTES_WRITTEN)
+            self.__wrapped.write(text[written : written + to_write])
+            written += to_write
+
+
+_wrapped_std_streams = set()
+
+
+def _wrap_std_stream(name):
+    # Python 2 & Windows 7 and below
+    if (
+        PY2
+        and sys.getwindowsversion()[:2] <= (6, 1)
+        and name not in _wrapped_std_streams
+    ):
+        setattr(sys, name, WindowsChunkedWriter(getattr(sys, name)))
+        _wrapped_std_streams.add(name)
+
+
+def _get_text_stdin(buffer_stream):
+    text_stream = _NonClosingTextIOWrapper(
+        io.BufferedReader(_WindowsConsoleReader(STDIN_HANDLE)),
+        "utf-16-le",
+        "strict",
+        line_buffering=True,
+    )
+    return ConsoleStream(text_stream, buffer_stream)
+
+
+def _get_text_stdout(buffer_stream):
+    text_stream = _NonClosingTextIOWrapper(
+        io.BufferedWriter(_WindowsConsoleWriter(STDOUT_HANDLE)),
+        "utf-16-le",
+        "strict",
+        line_buffering=True,
+    )
+    return ConsoleStream(text_stream, buffer_stream)
+
+
+def _get_text_stderr(buffer_stream):
+    text_stream = _NonClosingTextIOWrapper(
+        io.BufferedWriter(_WindowsConsoleWriter(STDERR_HANDLE)),
+        "utf-16-le",
+        "strict",
+        line_buffering=True,
+    )
+    return ConsoleStream(text_stream, buffer_stream)
+
+
+if PY2:
+
+    def _hash_py_argv():
+        return zlib.crc32("\x00".join(sys.argv[1:]))
+
+    _initial_argv_hash = _hash_py_argv()
+
+    def _get_windows_argv():
+        argc = c_int(0)
+        argv_unicode = CommandLineToArgvW(GetCommandLineW(), byref(argc))
+        if not argv_unicode:
+            raise WinError()
+        try:
+            argv = [argv_unicode[i] for i in range(0, argc.value)]
+        finally:
+            LocalFree(argv_unicode)
+            del argv_unicode
+
+        if not hasattr(sys, "frozen"):
+            argv = argv[1:]
+            while len(argv) > 0:
+                arg = argv[0]
+                if not arg.startswith("-") or arg == "-":
+                    break
+                argv = argv[1:]
+                if arg.startswith(("-c", "-m")):
+                    break
+
+        return argv[1:]
+
+
+_stream_factories = {
+    0: _get_text_stdin,
+    1: _get_text_stdout,
+    2: _get_text_stderr,
+}
+
+
+def _is_console(f):
+    if not hasattr(f, "fileno"):
+        return False
+
+    try:
+        fileno = f.fileno()
+    except OSError:
+        return False
+
+    handle = msvcrt.get_osfhandle(fileno)
+    return bool(GetConsoleMode(handle, byref(DWORD())))
+
+
+def _get_windows_console_stream(f, encoding, errors):
+    if (
+        get_buffer is not None
+        and encoding in ("utf-16-le", None)
+        and errors in ("strict", None)
+        and _is_console(f)
+    ):
+        func = _stream_factories.get(f.fileno())
+        if func is not None:
+            if not PY2:
+                f = getattr(f, "buffer", None)
+                if f is None:
+                    return None
+            else:
+                # If we are on Python 2 we need to set the stream that we
+                # deal with to binary mode as otherwise the exercise if a
+                # bit moot.  The same problems apply as for
+                # get_binary_stdin and friends from _compat.
+                msvcrt.setmode(f.fileno(), os.O_BINARY)
+            return func(f)
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/core.py b/python3-vckonline/lib/python3.8/site-packages/click/core.py
new file mode 100644
index 0000000..f58bf26
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/core.py
@@ -0,0 +1,2030 @@
+import errno
+import inspect
+import os
+import sys
+from contextlib import contextmanager
+from functools import update_wrapper
+from itertools import repeat
+
+from ._compat import isidentifier
+from ._compat import iteritems
+from ._compat import PY2
+from ._compat import string_types
+from ._unicodefun import _check_for_unicode_literals
+from ._unicodefun import _verify_python3_env
+from .exceptions import Abort
+from .exceptions import BadParameter
+from .exceptions import ClickException
+from .exceptions import Exit
+from .exceptions import MissingParameter
+from .exceptions import UsageError
+from .formatting import HelpFormatter
+from .formatting import join_options
+from .globals import pop_context
+from .globals import push_context
+from .parser import OptionParser
+from .parser import split_opt
+from .termui import confirm
+from .termui import prompt
+from .termui import style
+from .types import BOOL
+from .types import convert_type
+from .types import IntRange
+from .utils import echo
+from .utils import get_os_args
+from .utils import make_default_short_help
+from .utils import make_str
+from .utils import PacifyFlushWrapper
+
+_missing = object()
+
+SUBCOMMAND_METAVAR = "COMMAND [ARGS]..."
+SUBCOMMANDS_METAVAR = "COMMAND1 [ARGS]... [COMMAND2 [ARGS]...]..."
+
+DEPRECATED_HELP_NOTICE = " (DEPRECATED)"
+DEPRECATED_INVOKE_NOTICE = "DeprecationWarning: The command %(name)s is deprecated."
+
+
+def _maybe_show_deprecated_notice(cmd):
+    if cmd.deprecated:
+        echo(style(DEPRECATED_INVOKE_NOTICE % {"name": cmd.name}, fg="red"), err=True)
+
+
+def fast_exit(code):
+    """Exit without garbage collection, this speeds up exit by about 10ms for
+    things like bash completion.
+    """
+    sys.stdout.flush()
+    sys.stderr.flush()
+    os._exit(code)
+
+
+def _bashcomplete(cmd, prog_name, complete_var=None):
+    """Internal handler for the bash completion support."""
+    if complete_var is None:
+        complete_var = "_{}_COMPLETE".format(prog_name.replace("-", "_").upper())
+    complete_instr = os.environ.get(complete_var)
+    if not complete_instr:
+        return
+
+    from ._bashcomplete import bashcomplete
+
+    if bashcomplete(cmd, prog_name, complete_var, complete_instr):
+        fast_exit(1)
+
+
+def _check_multicommand(base_command, cmd_name, cmd, register=False):
+    if not base_command.chain or not isinstance(cmd, MultiCommand):
+        return
+    if register:
+        hint = (
+            "It is not possible to add multi commands as children to"
+            " another multi command that is in chain mode."
+        )
+    else:
+        hint = (
+            "Found a multi command as subcommand to a multi command"
+            " that is in chain mode. This is not supported."
+        )
+    raise RuntimeError(
+        "{}. Command '{}' is set to chain and '{}' was added as"
+        " subcommand but it in itself is a multi command. ('{}' is a {}"
+        " within a chained {} named '{}').".format(
+            hint,
+            base_command.name,
+            cmd_name,
+            cmd_name,
+            cmd.__class__.__name__,
+            base_command.__class__.__name__,
+            base_command.name,
+        )
+    )
+
+
+def batch(iterable, batch_size):
+    return list(zip(*repeat(iter(iterable), batch_size)))
+
+
+def invoke_param_callback(callback, ctx, param, value):
+    code = getattr(callback, "__code__", None)
+    args = getattr(code, "co_argcount", 3)
+
+    if args < 3:
+        from warnings import warn
+
+        warn(
+            "Parameter callbacks take 3 args, (ctx, param, value). The"
+            " 2-arg style is deprecated and will be removed in 8.0.".format(callback),
+            DeprecationWarning,
+            stacklevel=3,
+        )
+        return callback(ctx, value)
+
+    return callback(ctx, param, value)
+
+
+@contextmanager
+def augment_usage_errors(ctx, param=None):
+    """Context manager that attaches extra information to exceptions."""
+    try:
+        yield
+    except BadParameter as e:
+        if e.ctx is None:
+            e.ctx = ctx
+        if param is not None and e.param is None:
+            e.param = param
+        raise
+    except UsageError as e:
+        if e.ctx is None:
+            e.ctx = ctx
+        raise
+
+
+def iter_params_for_processing(invocation_order, declaration_order):
+    """Given a sequence of parameters in the order as should be considered
+    for processing and an iterable of parameters that exist, this returns
+    a list in the correct order as they should be processed.
+    """
+
+    def sort_key(item):
+        try:
+            idx = invocation_order.index(item)
+        except ValueError:
+            idx = float("inf")
+        return (not item.is_eager, idx)
+
+    return sorted(declaration_order, key=sort_key)
+
+
+class Context(object):
+    """The context is a special internal object that holds state relevant
+    for the script execution at every single level.  It's normally invisible
+    to commands unless they opt-in to getting access to it.
+
+    The context is useful as it can pass internal objects around and can
+    control special execution features such as reading data from
+    environment variables.
+
+    A context can be used as context manager in which case it will call
+    :meth:`close` on teardown.
+
+    .. versionadded:: 2.0
+       Added the `resilient_parsing`, `help_option_names`,
+       `token_normalize_func` parameters.
+
+    .. versionadded:: 3.0
+       Added the `allow_extra_args` and `allow_interspersed_args`
+       parameters.
+
+    .. versionadded:: 4.0
+       Added the `color`, `ignore_unknown_options`, and
+       `max_content_width` parameters.
+
+    .. versionadded:: 7.1
+       Added the `show_default` parameter.
+
+    :param command: the command class for this context.
+    :param parent: the parent context.
+    :param info_name: the info name for this invocation.  Generally this
+                      is the most descriptive name for the script or
+                      command.  For the toplevel script it is usually
+                      the name of the script, for commands below it it's
+                      the name of the script.
+    :param obj: an arbitrary object of user data.
+    :param auto_envvar_prefix: the prefix to use for automatic environment
+                               variables.  If this is `None` then reading
+                               from environment variables is disabled.  This
+                               does not affect manually set environment
+                               variables which are always read.
+    :param default_map: a dictionary (like object) with default values
+                        for parameters.
+    :param terminal_width: the width of the terminal.  The default is
+                           inherit from parent context.  If no context
+                           defines the terminal width then auto
+                           detection will be applied.
+    :param max_content_width: the maximum width for content rendered by
+                              Click (this currently only affects help
+                              pages).  This defaults to 80 characters if
+                              not overridden.  In other words: even if the
+                              terminal is larger than that, Click will not
+                              format things wider than 80 characters by
+                              default.  In addition to that, formatters might
+                              add some safety mapping on the right.
+    :param resilient_parsing: if this flag is enabled then Click will
+                              parse without any interactivity or callback
+                              invocation.  Default values will also be
+                              ignored.  This is useful for implementing
+                              things such as completion support.
+    :param allow_extra_args: if this is set to `True` then extra arguments
+                             at the end will not raise an error and will be
+                             kept on the context.  The default is to inherit
+                             from the command.
+    :param allow_interspersed_args: if this is set to `False` then options
+                                    and arguments cannot be mixed.  The
+                                    default is to inherit from the command.
+    :param ignore_unknown_options: instructs click to ignore options it does
+                                   not know and keeps them for later
+                                   processing.
+    :param help_option_names: optionally a list of strings that define how
+                              the default help parameter is named.  The
+                              default is ``['--help']``.
+    :param token_normalize_func: an optional function that is used to
+                                 normalize tokens (options, choices,
+                                 etc.).  This for instance can be used to
+                                 implement case insensitive behavior.
+    :param color: controls if the terminal supports ANSI colors or not.  The
+                  default is autodetection.  This is only needed if ANSI
+                  codes are used in texts that Click prints which is by
+                  default not the case.  This for instance would affect
+                  help output.
+    :param show_default: if True, shows defaults for all options.
+                    Even if an option is later created with show_default=False,
+                    this command-level setting overrides it.
+    """
+
+    def __init__(
+        self,
+        command,
+        parent=None,
+        info_name=None,
+        obj=None,
+        auto_envvar_prefix=None,
+        default_map=None,
+        terminal_width=None,
+        max_content_width=None,
+        resilient_parsing=False,
+        allow_extra_args=None,
+        allow_interspersed_args=None,
+        ignore_unknown_options=None,
+        help_option_names=None,
+        token_normalize_func=None,
+        color=None,
+        show_default=None,
+    ):
+        #: the parent context or `None` if none exists.
+        self.parent = parent
+        #: the :class:`Command` for this context.
+        self.command = command
+        #: the descriptive information name
+        self.info_name = info_name
+        #: the parsed parameters except if the value is hidden in which
+        #: case it's not remembered.
+        self.params = {}
+        #: the leftover arguments.
+        self.args = []
+        #: protected arguments.  These are arguments that are prepended
+        #: to `args` when certain parsing scenarios are encountered but
+        #: must be never propagated to another arguments.  This is used
+        #: to implement nested parsing.
+        self.protected_args = []
+        if obj is None and parent is not None:
+            obj = parent.obj
+        #: the user object stored.
+        self.obj = obj
+        self._meta = getattr(parent, "meta", {})
+
+        #: A dictionary (-like object) with defaults for parameters.
+        if (
+            default_map is None
+            and parent is not None
+            and parent.default_map is not None
+        ):
+            default_map = parent.default_map.get(info_name)
+        self.default_map = default_map
+
+        #: This flag indicates if a subcommand is going to be executed. A
+        #: group callback can use this information to figure out if it's
+        #: being executed directly or because the execution flow passes
+        #: onwards to a subcommand. By default it's None, but it can be
+        #: the name of the subcommand to execute.
+        #:
+        #: If chaining is enabled this will be set to ``'*'`` in case
+        #: any commands are executed.  It is however not possible to
+        #: figure out which ones.  If you require this knowledge you
+        #: should use a :func:`resultcallback`.
+        self.invoked_subcommand = None
+
+        if terminal_width is None and parent is not None:
+            terminal_width = parent.terminal_width
+        #: The width of the terminal (None is autodetection).
+        self.terminal_width = terminal_width
+
+        if max_content_width is None and parent is not None:
+            max_content_width = parent.max_content_width
+        #: The maximum width of formatted content (None implies a sensible
+        #: default which is 80 for most things).
+        self.max_content_width = max_content_width
+
+        if allow_extra_args is None:
+            allow_extra_args = command.allow_extra_args
+        #: Indicates if the context allows extra args or if it should
+        #: fail on parsing.
+        #:
+        #: .. versionadded:: 3.0
+        self.allow_extra_args = allow_extra_args
+
+        if allow_interspersed_args is None:
+            allow_interspersed_args = command.allow_interspersed_args
+        #: Indicates if the context allows mixing of arguments and
+        #: options or not.
+        #:
+        #: .. versionadded:: 3.0
+        self.allow_interspersed_args = allow_interspersed_args
+
+        if ignore_unknown_options is None:
+            ignore_unknown_options = command.ignore_unknown_options
+        #: Instructs click to ignore options that a command does not
+        #: understand and will store it on the context for later
+        #: processing.  This is primarily useful for situations where you
+        #: want to call into external programs.  Generally this pattern is
+        #: strongly discouraged because it's not possibly to losslessly
+        #: forward all arguments.
+        #:
+        #: .. versionadded:: 4.0
+        self.ignore_unknown_options = ignore_unknown_options
+
+        if help_option_names is None:
+            if parent is not None:
+                help_option_names = parent.help_option_names
+            else:
+                help_option_names = ["--help"]
+
+        #: The names for the help options.
+        self.help_option_names = help_option_names
+
+        if token_normalize_func is None and parent is not None:
+            token_normalize_func = parent.token_normalize_func
+
+        #: An optional normalization function for tokens.  This is
+        #: options, choices, commands etc.
+        self.token_normalize_func = token_normalize_func
+
+        #: Indicates if resilient parsing is enabled.  In that case Click
+        #: will do its best to not cause any failures and default values
+        #: will be ignored. Useful for completion.
+        self.resilient_parsing = resilient_parsing
+
+        # If there is no envvar prefix yet, but the parent has one and
+        # the command on this level has a name, we can expand the envvar
+        # prefix automatically.
+        if auto_envvar_prefix is None:
+            if (
+                parent is not None
+                and parent.auto_envvar_prefix is not None
+                and self.info_name is not None
+            ):
+                auto_envvar_prefix = "{}_{}".format(
+                    parent.auto_envvar_prefix, self.info_name.upper()
+                )
+        else:
+            auto_envvar_prefix = auto_envvar_prefix.upper()
+        if auto_envvar_prefix is not None:
+            auto_envvar_prefix = auto_envvar_prefix.replace("-", "_")
+        self.auto_envvar_prefix = auto_envvar_prefix
+
+        if color is None and parent is not None:
+            color = parent.color
+
+        #: Controls if styling output is wanted or not.
+        self.color = color
+
+        self.show_default = show_default
+
+        self._close_callbacks = []
+        self._depth = 0
+
+    def __enter__(self):
+        self._depth += 1
+        push_context(self)
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self._depth -= 1
+        if self._depth == 0:
+            self.close()
+        pop_context()
+
+    @contextmanager
+    def scope(self, cleanup=True):
+        """This helper method can be used with the context object to promote
+        it to the current thread local (see :func:`get_current_context`).
+        The default behavior of this is to invoke the cleanup functions which
+        can be disabled by setting `cleanup` to `False`.  The cleanup
+        functions are typically used for things such as closing file handles.
+
+        If the cleanup is intended the context object can also be directly
+        used as a context manager.
+
+        Example usage::
+
+            with ctx.scope():
+                assert get_current_context() is ctx
+
+        This is equivalent::
+
+            with ctx:
+                assert get_current_context() is ctx
+
+        .. versionadded:: 5.0
+
+        :param cleanup: controls if the cleanup functions should be run or
+                        not.  The default is to run these functions.  In
+                        some situations the context only wants to be
+                        temporarily pushed in which case this can be disabled.
+                        Nested pushes automatically defer the cleanup.
+        """
+        if not cleanup:
+            self._depth += 1
+        try:
+            with self as rv:
+                yield rv
+        finally:
+            if not cleanup:
+                self._depth -= 1
+
+    @property
+    def meta(self):
+        """This is a dictionary which is shared with all the contexts
+        that are nested.  It exists so that click utilities can store some
+        state here if they need to.  It is however the responsibility of
+        that code to manage this dictionary well.
+
+        The keys are supposed to be unique dotted strings.  For instance
+        module paths are a good choice for it.  What is stored in there is
+        irrelevant for the operation of click.  However what is important is
+        that code that places data here adheres to the general semantics of
+        the system.
+
+        Example usage::
+
+            LANG_KEY = f'{__name__}.lang'
+
+            def set_language(value):
+                ctx = get_current_context()
+                ctx.meta[LANG_KEY] = value
+
+            def get_language():
+                return get_current_context().meta.get(LANG_KEY, 'en_US')
+
+        .. versionadded:: 5.0
+        """
+        return self._meta
+
+    def make_formatter(self):
+        """Creates the formatter for the help and usage output."""
+        return HelpFormatter(
+            width=self.terminal_width, max_width=self.max_content_width
+        )
+
+    def call_on_close(self, f):
+        """This decorator remembers a function as callback that should be
+        executed when the context tears down.  This is most useful to bind
+        resource handling to the script execution.  For instance, file objects
+        opened by the :class:`File` type will register their close callbacks
+        here.
+
+        :param f: the function to execute on teardown.
+        """
+        self._close_callbacks.append(f)
+        return f
+
+    def close(self):
+        """Invokes all close callbacks."""
+        for cb in self._close_callbacks:
+            cb()
+        self._close_callbacks = []
+
+    @property
+    def command_path(self):
+        """The computed command path.  This is used for the ``usage``
+        information on the help page.  It's automatically created by
+        combining the info names of the chain of contexts to the root.
+        """
+        rv = ""
+        if self.info_name is not None:
+            rv = self.info_name
+        if self.parent is not None:
+            rv = "{} {}".format(self.parent.command_path, rv)
+        return rv.lstrip()
+
+    def find_root(self):
+        """Finds the outermost context."""
+        node = self
+        while node.parent is not None:
+            node = node.parent
+        return node
+
+    def find_object(self, object_type):
+        """Finds the closest object of a given type."""
+        node = self
+        while node is not None:
+            if isinstance(node.obj, object_type):
+                return node.obj
+            node = node.parent
+
+    def ensure_object(self, object_type):
+        """Like :meth:`find_object` but sets the innermost object to a
+        new instance of `object_type` if it does not exist.
+        """
+        rv = self.find_object(object_type)
+        if rv is None:
+            self.obj = rv = object_type()
+        return rv
+
+    def lookup_default(self, name):
+        """Looks up the default for a parameter name.  This by default
+        looks into the :attr:`default_map` if available.
+        """
+        if self.default_map is not None:
+            rv = self.default_map.get(name)
+            if callable(rv):
+                rv = rv()
+            return rv
+
+    def fail(self, message):
+        """Aborts the execution of the program with a specific error
+        message.
+
+        :param message: the error message to fail with.
+        """
+        raise UsageError(message, self)
+
+    def abort(self):
+        """Aborts the script."""
+        raise Abort()
+
+    def exit(self, code=0):
+        """Exits the application with a given exit code."""
+        raise Exit(code)
+
+    def get_usage(self):
+        """Helper method to get formatted usage string for the current
+        context and command.
+        """
+        return self.command.get_usage(self)
+
+    def get_help(self):
+        """Helper method to get formatted help page for the current
+        context and command.
+        """
+        return self.command.get_help(self)
+
+    def invoke(*args, **kwargs):  # noqa: B902
+        """Invokes a command callback in exactly the way it expects.  There
+        are two ways to invoke this method:
+
+        1.  the first argument can be a callback and all other arguments and
+            keyword arguments are forwarded directly to the function.
+        2.  the first argument is a click command object.  In that case all
+            arguments are forwarded as well but proper click parameters
+            (options and click arguments) must be keyword arguments and Click
+            will fill in defaults.
+
+        Note that before Click 3.2 keyword arguments were not properly filled
+        in against the intention of this code and no context was created.  For
+        more information about this change and why it was done in a bugfix
+        release see :ref:`upgrade-to-3.2`.
+        """
+        self, callback = args[:2]
+        ctx = self
+
+        # It's also possible to invoke another command which might or
+        # might not have a callback.  In that case we also fill
+        # in defaults and make a new context for this command.
+        if isinstance(callback, Command):
+            other_cmd = callback
+            callback = other_cmd.callback
+            ctx = Context(other_cmd, info_name=other_cmd.name, parent=self)
+            if callback is None:
+                raise TypeError(
+                    "The given command does not have a callback that can be invoked."
+                )
+
+            for param in other_cmd.params:
+                if param.name not in kwargs and param.expose_value:
+                    kwargs[param.name] = param.get_default(ctx)
+
+        args = args[2:]
+        with augment_usage_errors(self):
+            with ctx:
+                return callback(*args, **kwargs)
+
+    def forward(*args, **kwargs):  # noqa: B902
+        """Similar to :meth:`invoke` but fills in default keyword
+        arguments from the current context if the other command expects
+        it.  This cannot invoke callbacks directly, only other commands.
+        """
+        self, cmd = args[:2]
+
+        # It's also possible to invoke another command which might or
+        # might not have a callback.
+        if not isinstance(cmd, Command):
+            raise TypeError("Callback is not a command.")
+
+        for param in self.params:
+            if param not in kwargs:
+                kwargs[param] = self.params[param]
+
+        return self.invoke(cmd, **kwargs)
+
+
+class BaseCommand(object):
+    """The base command implements the minimal API contract of commands.
+    Most code will never use this as it does not implement a lot of useful
+    functionality but it can act as the direct subclass of alternative
+    parsing methods that do not depend on the Click parser.
+
+    For instance, this can be used to bridge Click and other systems like
+    argparse or docopt.
+
+    Because base commands do not implement a lot of the API that other
+    parts of Click take for granted, they are not supported for all
+    operations.  For instance, they cannot be used with the decorators
+    usually and they have no built-in callback system.
+
+    .. versionchanged:: 2.0
+       Added the `context_settings` parameter.
+
+    :param name: the name of the command to use unless a group overrides it.
+    :param context_settings: an optional dictionary with defaults that are
+                             passed to the context object.
+    """
+
+    #: the default for the :attr:`Context.allow_extra_args` flag.
+    allow_extra_args = False
+    #: the default for the :attr:`Context.allow_interspersed_args` flag.
+    allow_interspersed_args = True
+    #: the default for the :attr:`Context.ignore_unknown_options` flag.
+    ignore_unknown_options = False
+
+    def __init__(self, name, context_settings=None):
+        #: the name the command thinks it has.  Upon registering a command
+        #: on a :class:`Group` the group will default the command name
+        #: with this information.  You should instead use the
+        #: :class:`Context`\'s :attr:`~Context.info_name` attribute.
+        self.name = name
+        if context_settings is None:
+            context_settings = {}
+        #: an optional dictionary with defaults passed to the context.
+        self.context_settings = context_settings
+
+    def __repr__(self):
+        return "<{} {}>".format(self.__class__.__name__, self.name)
+
+    def get_usage(self, ctx):
+        raise NotImplementedError("Base commands cannot get usage")
+
+    def get_help(self, ctx):
+        raise NotImplementedError("Base commands cannot get help")
+
+    def make_context(self, info_name, args, parent=None, **extra):
+        """This function when given an info name and arguments will kick
+        off the parsing and create a new :class:`Context`.  It does not
+        invoke the actual command callback though.
+
+        :param info_name: the info name for this invokation.  Generally this
+                          is the most descriptive name for the script or
+                          command.  For the toplevel script it's usually
+                          the name of the script, for commands below it it's
+                          the name of the script.
+        :param args: the arguments to parse as list of strings.
+        :param parent: the parent context if available.
+        :param extra: extra keyword arguments forwarded to the context
+                      constructor.
+        """
+        for key, value in iteritems(self.context_settings):
+            if key not in extra:
+                extra[key] = value
+        ctx = Context(self, info_name=info_name, parent=parent, **extra)
+        with ctx.scope(cleanup=False):
+            self.parse_args(ctx, args)
+        return ctx
+
+    def parse_args(self, ctx, args):
+        """Given a context and a list of arguments this creates the parser
+        and parses the arguments, then modifies the context as necessary.
+        This is automatically invoked by :meth:`make_context`.
+        """
+        raise NotImplementedError("Base commands do not know how to parse arguments.")
+
+    def invoke(self, ctx):
+        """Given a context, this invokes the command.  The default
+        implementation is raising a not implemented error.
+        """
+        raise NotImplementedError("Base commands are not invokable by default")
+
+    def main(
+        self,
+        args=None,
+        prog_name=None,
+        complete_var=None,
+        standalone_mode=True,
+        **extra
+    ):
+        """This is the way to invoke a script with all the bells and
+        whistles as a command line application.  This will always terminate
+        the application after a call.  If this is not wanted, ``SystemExit``
+        needs to be caught.
+
+        This method is also available by directly calling the instance of
+        a :class:`Command`.
+
+        .. versionadded:: 3.0
+           Added the `standalone_mode` flag to control the standalone mode.
+
+        :param args: the arguments that should be used for parsing.  If not
+                     provided, ``sys.argv[1:]`` is used.
+        :param prog_name: the program name that should be used.  By default
+                          the program name is constructed by taking the file
+                          name from ``sys.argv[0]``.
+        :param complete_var: the environment variable that controls the
+                             bash completion support.  The default is
+                             ``"_<prog_name>_COMPLETE"`` with prog_name in
+                             uppercase.
+        :param standalone_mode: the default behavior is to invoke the script
+                                in standalone mode.  Click will then
+                                handle exceptions and convert them into
+                                error messages and the function will never
+                                return but shut down the interpreter.  If
+                                this is set to `False` they will be
+                                propagated to the caller and the return
+                                value of this function is the return value
+                                of :meth:`invoke`.
+        :param extra: extra keyword arguments are forwarded to the context
+                      constructor.  See :class:`Context` for more information.
+        """
+        # If we are in Python 3, we will verify that the environment is
+        # sane at this point or reject further execution to avoid a
+        # broken script.
+        if not PY2:
+            _verify_python3_env()
+        else:
+            _check_for_unicode_literals()
+
+        if args is None:
+            args = get_os_args()
+        else:
+            args = list(args)
+
+        if prog_name is None:
+            prog_name = make_str(
+                os.path.basename(sys.argv[0] if sys.argv else __file__)
+            )
+
+        # Hook for the Bash completion.  This only activates if the Bash
+        # completion is actually enabled, otherwise this is quite a fast
+        # noop.
+        _bashcomplete(self, prog_name, complete_var)
+
+        try:
+            try:
+                with self.make_context(prog_name, args, **extra) as ctx:
+                    rv = self.invoke(ctx)
+                    if not standalone_mode:
+                        return rv
+                    # it's not safe to `ctx.exit(rv)` here!
+                    # note that `rv` may actually contain data like "1" which
+                    # has obvious effects
+                    # more subtle case: `rv=[None, None]` can come out of
+                    # chained commands which all returned `None` -- so it's not
+                    # even always obvious that `rv` indicates success/failure
+                    # by its truthiness/falsiness
+                    ctx.exit()
+            except (EOFError, KeyboardInterrupt):
+                echo(file=sys.stderr)
+                raise Abort()
+            except ClickException as e:
+                if not standalone_mode:
+                    raise
+                e.show()
+                sys.exit(e.exit_code)
+            except IOError as e:
+                if e.errno == errno.EPIPE:
+                    sys.stdout = PacifyFlushWrapper(sys.stdout)
+                    sys.stderr = PacifyFlushWrapper(sys.stderr)
+                    sys.exit(1)
+                else:
+                    raise
+        except Exit as e:
+            if standalone_mode:
+                sys.exit(e.exit_code)
+            else:
+                # in non-standalone mode, return the exit code
+                # note that this is only reached if `self.invoke` above raises
+                # an Exit explicitly -- thus bypassing the check there which
+                # would return its result
+                # the results of non-standalone execution may therefore be
+                # somewhat ambiguous: if there are codepaths which lead to
+                # `ctx.exit(1)` and to `return 1`, the caller won't be able to
+                # tell the difference between the two
+                return e.exit_code
+        except Abort:
+            if not standalone_mode:
+                raise
+            echo("Aborted!", file=sys.stderr)
+            sys.exit(1)
+
+    def __call__(self, *args, **kwargs):
+        """Alias for :meth:`main`."""
+        return self.main(*args, **kwargs)
+
+
+class Command(BaseCommand):
+    """Commands are the basic building block of command line interfaces in
+    Click.  A basic command handles command line parsing and might dispatch
+    more parsing to commands nested below it.
+
+    .. versionchanged:: 2.0
+       Added the `context_settings` parameter.
+    .. versionchanged:: 7.1
+       Added the `no_args_is_help` parameter.
+
+    :param name: the name of the command to use unless a group overrides it.
+    :param context_settings: an optional dictionary with defaults that are
+                             passed to the context object.
+    :param callback: the callback to invoke.  This is optional.
+    :param params: the parameters to register with this command.  This can
+                   be either :class:`Option` or :class:`Argument` objects.
+    :param help: the help string to use for this command.
+    :param epilog: like the help string but it's printed at the end of the
+                   help page after everything else.
+    :param short_help: the short help to use for this command.  This is
+                       shown on the command listing of the parent command.
+    :param add_help_option: by default each command registers a ``--help``
+                            option.  This can be disabled by this parameter.
+    :param no_args_is_help: this controls what happens if no arguments are
+                            provided.  This option is disabled by default.
+                            If enabled this will add ``--help`` as argument
+                            if no arguments are passed
+    :param hidden: hide this command from help outputs.
+
+    :param deprecated: issues a message indicating that
+                             the command is deprecated.
+    """
+
+    def __init__(
+        self,
+        name,
+        context_settings=None,
+        callback=None,
+        params=None,
+        help=None,
+        epilog=None,
+        short_help=None,
+        options_metavar="[OPTIONS]",
+        add_help_option=True,
+        no_args_is_help=False,
+        hidden=False,
+        deprecated=False,
+    ):
+        BaseCommand.__init__(self, name, context_settings)
+        #: the callback to execute when the command fires.  This might be
+        #: `None` in which case nothing happens.
+        self.callback = callback
+        #: the list of parameters for this command in the order they
+        #: should show up in the help page and execute.  Eager parameters
+        #: will automatically be handled before non eager ones.
+        self.params = params or []
+        # if a form feed (page break) is found in the help text, truncate help
+        # text to the content preceding the first form feed
+        if help and "\f" in help:
+            help = help.split("\f", 1)[0]
+        self.help = help
+        self.epilog = epilog
+        self.options_metavar = options_metavar
+        self.short_help = short_help
+        self.add_help_option = add_help_option
+        self.no_args_is_help = no_args_is_help
+        self.hidden = hidden
+        self.deprecated = deprecated
+
+    def get_usage(self, ctx):
+        """Formats the usage line into a string and returns it.
+
+        Calls :meth:`format_usage` internally.
+        """
+        formatter = ctx.make_formatter()
+        self.format_usage(ctx, formatter)
+        return formatter.getvalue().rstrip("\n")
+
+    def get_params(self, ctx):
+        rv = self.params
+        help_option = self.get_help_option(ctx)
+        if help_option is not None:
+            rv = rv + [help_option]
+        return rv
+
+    def format_usage(self, ctx, formatter):
+        """Writes the usage line into the formatter.
+
+        This is a low-level method called by :meth:`get_usage`.
+        """
+        pieces = self.collect_usage_pieces(ctx)
+        formatter.write_usage(ctx.command_path, " ".join(pieces))
+
+    def collect_usage_pieces(self, ctx):
+        """Returns all the pieces that go into the usage line and returns
+        it as a list of strings.
+        """
+        rv = [self.options_metavar]
+        for param in self.get_params(ctx):
+            rv.extend(param.get_usage_pieces(ctx))
+        return rv
+
+    def get_help_option_names(self, ctx):
+        """Returns the names for the help option."""
+        all_names = set(ctx.help_option_names)
+        for param in self.params:
+            all_names.difference_update(param.opts)
+            all_names.difference_update(param.secondary_opts)
+        return all_names
+
+    def get_help_option(self, ctx):
+        """Returns the help option object."""
+        help_options = self.get_help_option_names(ctx)
+        if not help_options or not self.add_help_option:
+            return
+
+        def show_help(ctx, param, value):
+            if value and not ctx.resilient_parsing:
+                echo(ctx.get_help(), color=ctx.color)
+                ctx.exit()
+
+        return Option(
+            help_options,
+            is_flag=True,
+            is_eager=True,
+            expose_value=False,
+            callback=show_help,
+            help="Show this message and exit.",
+        )
+
+    def make_parser(self, ctx):
+        """Creates the underlying option parser for this command."""
+        parser = OptionParser(ctx)
+        for param in self.get_params(ctx):
+            param.add_to_parser(parser, ctx)
+        return parser
+
+    def get_help(self, ctx):
+        """Formats the help into a string and returns it.
+
+        Calls :meth:`format_help` internally.
+        """
+        formatter = ctx.make_formatter()
+        self.format_help(ctx, formatter)
+        return formatter.getvalue().rstrip("\n")
+
+    def get_short_help_str(self, limit=45):
+        """Gets short help for the command or makes it by shortening the
+        long help string.
+        """
+        return (
+            self.short_help
+            or self.help
+            and make_default_short_help(self.help, limit)
+            or ""
+        )
+
+    def format_help(self, ctx, formatter):
+        """Writes the help into the formatter if it exists.
+
+        This is a low-level method called by :meth:`get_help`.
+
+        This calls the following methods:
+
+        -   :meth:`format_usage`
+        -   :meth:`format_help_text`
+        -   :meth:`format_options`
+        -   :meth:`format_epilog`
+        """
+        self.format_usage(ctx, formatter)
+        self.format_help_text(ctx, formatter)
+        self.format_options(ctx, formatter)
+        self.format_epilog(ctx, formatter)
+
+    def format_help_text(self, ctx, formatter):
+        """Writes the help text to the formatter if it exists."""
+        if self.help:
+            formatter.write_paragraph()
+            with formatter.indentation():
+                help_text = self.help
+                if self.deprecated:
+                    help_text += DEPRECATED_HELP_NOTICE
+                formatter.write_text(help_text)
+        elif self.deprecated:
+            formatter.write_paragraph()
+            with formatter.indentation():
+                formatter.write_text(DEPRECATED_HELP_NOTICE)
+
+    def format_options(self, ctx, formatter):
+        """Writes all the options into the formatter if they exist."""
+        opts = []
+        for param in self.get_params(ctx):
+            rv = param.get_help_record(ctx)
+            if rv is not None:
+                opts.append(rv)
+
+        if opts:
+            with formatter.section("Options"):
+                formatter.write_dl(opts)
+
+    def format_epilog(self, ctx, formatter):
+        """Writes the epilog into the formatter if it exists."""
+        if self.epilog:
+            formatter.write_paragraph()
+            with formatter.indentation():
+                formatter.write_text(self.epilog)
+
+    def parse_args(self, ctx, args):
+        if not args and self.no_args_is_help and not ctx.resilient_parsing:
+            echo(ctx.get_help(), color=ctx.color)
+            ctx.exit()
+
+        parser = self.make_parser(ctx)
+        opts, args, param_order = parser.parse_args(args=args)
+
+        for param in iter_params_for_processing(param_order, self.get_params(ctx)):
+            value, args = param.handle_parse_result(ctx, opts, args)
+
+        if args and not ctx.allow_extra_args and not ctx.resilient_parsing:
+            ctx.fail(
+                "Got unexpected extra argument{} ({})".format(
+                    "s" if len(args) != 1 else "", " ".join(map(make_str, args))
+                )
+            )
+
+        ctx.args = args
+        return args
+
+    def invoke(self, ctx):
+        """Given a context, this invokes the attached callback (if it exists)
+        in the right way.
+        """
+        _maybe_show_deprecated_notice(self)
+        if self.callback is not None:
+            return ctx.invoke(self.callback, **ctx.params)
+
+
+class MultiCommand(Command):
+    """A multi command is the basic implementation of a command that
+    dispatches to subcommands.  The most common version is the
+    :class:`Group`.
+
+    :param invoke_without_command: this controls how the multi command itself
+                                   is invoked.  By default it's only invoked
+                                   if a subcommand is provided.
+    :param no_args_is_help: this controls what happens if no arguments are
+                            provided.  This option is enabled by default if
+                            `invoke_without_command` is disabled or disabled
+                            if it's enabled.  If enabled this will add
+                            ``--help`` as argument if no arguments are
+                            passed.
+    :param subcommand_metavar: the string that is used in the documentation
+                               to indicate the subcommand place.
+    :param chain: if this is set to `True` chaining of multiple subcommands
+                  is enabled.  This restricts the form of commands in that
+                  they cannot have optional arguments but it allows
+                  multiple commands to be chained together.
+    :param result_callback: the result callback to attach to this multi
+                            command.
+    """
+
+    allow_extra_args = True
+    allow_interspersed_args = False
+
+    def __init__(
+        self,
+        name=None,
+        invoke_without_command=False,
+        no_args_is_help=None,
+        subcommand_metavar=None,
+        chain=False,
+        result_callback=None,
+        **attrs
+    ):
+        Command.__init__(self, name, **attrs)
+        if no_args_is_help is None:
+            no_args_is_help = not invoke_without_command
+        self.no_args_is_help = no_args_is_help
+        self.invoke_without_command = invoke_without_command
+        if subcommand_metavar is None:
+            if chain:
+                subcommand_metavar = SUBCOMMANDS_METAVAR
+            else:
+                subcommand_metavar = SUBCOMMAND_METAVAR
+        self.subcommand_metavar = subcommand_metavar
+        self.chain = chain
+        #: The result callback that is stored.  This can be set or
+        #: overridden with the :func:`resultcallback` decorator.
+        self.result_callback = result_callback
+
+        if self.chain:
+            for param in self.params:
+                if isinstance(param, Argument) and not param.required:
+                    raise RuntimeError(
+                        "Multi commands in chain mode cannot have"
+                        " optional arguments."
+                    )
+
+    def collect_usage_pieces(self, ctx):
+        rv = Command.collect_usage_pieces(self, ctx)
+        rv.append(self.subcommand_metavar)
+        return rv
+
+    def format_options(self, ctx, formatter):
+        Command.format_options(self, ctx, formatter)
+        self.format_commands(ctx, formatter)
+
+    def resultcallback(self, replace=False):
+        """Adds a result callback to the chain command.  By default if a
+        result callback is already registered this will chain them but
+        this can be disabled with the `replace` parameter.  The result
+        callback is invoked with the return value of the subcommand
+        (or the list of return values from all subcommands if chaining
+        is enabled) as well as the parameters as they would be passed
+        to the main callback.
+
+        Example::
+
+            @click.group()
+            @click.option('-i', '--input', default=23)
+            def cli(input):
+                return 42
+
+            @cli.resultcallback()
+            def process_result(result, input):
+                return result + input
+
+        .. versionadded:: 3.0
+
+        :param replace: if set to `True` an already existing result
+                        callback will be removed.
+        """
+
+        def decorator(f):
+            old_callback = self.result_callback
+            if old_callback is None or replace:
+                self.result_callback = f
+                return f
+
+            def function(__value, *args, **kwargs):
+                return f(old_callback(__value, *args, **kwargs), *args, **kwargs)
+
+            self.result_callback = rv = update_wrapper(function, f)
+            return rv
+
+        return decorator
+
+    def format_commands(self, ctx, formatter):
+        """Extra format methods for multi methods that adds all the commands
+        after the options.
+        """
+        commands = []
+        for subcommand in self.list_commands(ctx):
+            cmd = self.get_command(ctx, subcommand)
+            # What is this, the tool lied about a command.  Ignore it
+            if cmd is None:
+                continue
+            if cmd.hidden:
+                continue
+
+            commands.append((subcommand, cmd))
+
+        # allow for 3 times the default spacing
+        if len(commands):
+            limit = formatter.width - 6 - max(len(cmd[0]) for cmd in commands)
+
+            rows = []
+            for subcommand, cmd in commands:
+                help = cmd.get_short_help_str(limit)
+                rows.append((subcommand, help))
+
+            if rows:
+                with formatter.section("Commands"):
+                    formatter.write_dl(rows)
+
+    def parse_args(self, ctx, args):
+        if not args and self.no_args_is_help and not ctx.resilient_parsing:
+            echo(ctx.get_help(), color=ctx.color)
+            ctx.exit()
+
+        rest = Command.parse_args(self, ctx, args)
+        if self.chain:
+            ctx.protected_args = rest
+            ctx.args = []
+        elif rest:
+            ctx.protected_args, ctx.args = rest[:1], rest[1:]
+
+        return ctx.args
+
+    def invoke(self, ctx):
+        def _process_result(value):
+            if self.result_callback is not None:
+                value = ctx.invoke(self.result_callback, value, **ctx.params)
+            return value
+
+        if not ctx.protected_args:
+            # If we are invoked without command the chain flag controls
+            # how this happens.  If we are not in chain mode, the return
+            # value here is the return value of the command.
+            # If however we are in chain mode, the return value is the
+            # return value of the result processor invoked with an empty
+            # list (which means that no subcommand actually was executed).
+            if self.invoke_without_command:
+                if not self.chain:
+                    return Command.invoke(self, ctx)
+                with ctx:
+                    Command.invoke(self, ctx)
+                    return _process_result([])
+            ctx.fail("Missing command.")
+
+        # Fetch args back out
+        args = ctx.protected_args + ctx.args
+        ctx.args = []
+        ctx.protected_args = []
+
+        # If we're not in chain mode, we only allow the invocation of a
+        # single command but we also inform the current context about the
+        # name of the command to invoke.
+        if not self.chain:
+            # Make sure the context is entered so we do not clean up
+            # resources until the result processor has worked.
+            with ctx:
+                cmd_name, cmd, args = self.resolve_command(ctx, args)
+                ctx.invoked_subcommand = cmd_name
+                Command.invoke(self, ctx)
+                sub_ctx = cmd.make_context(cmd_name, args, parent=ctx)
+                with sub_ctx:
+                    return _process_result(sub_ctx.command.invoke(sub_ctx))
+
+        # In chain mode we create the contexts step by step, but after the
+        # base command has been invoked.  Because at that point we do not
+        # know the subcommands yet, the invoked subcommand attribute is
+        # set to ``*`` to inform the command that subcommands are executed
+        # but nothing else.
+        with ctx:
+            ctx.invoked_subcommand = "*" if args else None
+            Command.invoke(self, ctx)
+
+            # Otherwise we make every single context and invoke them in a
+            # chain.  In that case the return value to the result processor
+            # is the list of all invoked subcommand's results.
+            contexts = []
+            while args:
+                cmd_name, cmd, args = self.resolve_command(ctx, args)
+                sub_ctx = cmd.make_context(
+                    cmd_name,
+                    args,
+                    parent=ctx,
+                    allow_extra_args=True,
+                    allow_interspersed_args=False,
+                )
+                contexts.append(sub_ctx)
+                args, sub_ctx.args = sub_ctx.args, []
+
+            rv = []
+            for sub_ctx in contexts:
+                with sub_ctx:
+                    rv.append(sub_ctx.command.invoke(sub_ctx))
+            return _process_result(rv)
+
+    def resolve_command(self, ctx, args):
+        cmd_name = make_str(args[0])
+        original_cmd_name = cmd_name
+
+        # Get the command
+        cmd = self.get_command(ctx, cmd_name)
+
+        # If we can't find the command but there is a normalization
+        # function available, we try with that one.
+        if cmd is None and ctx.token_normalize_func is not None:
+            cmd_name = ctx.token_normalize_func(cmd_name)
+            cmd = self.get_command(ctx, cmd_name)
+
+        # If we don't find the command we want to show an error message
+        # to the user that it was not provided.  However, there is
+        # something else we should do: if the first argument looks like
+        # an option we want to kick off parsing again for arguments to
+        # resolve things like --help which now should go to the main
+        # place.
+        if cmd is None and not ctx.resilient_parsing:
+            if split_opt(cmd_name)[0]:
+                self.parse_args(ctx, ctx.args)
+            ctx.fail("No such command '{}'.".format(original_cmd_name))
+
+        return cmd_name, cmd, args[1:]
+
+    def get_command(self, ctx, cmd_name):
+        """Given a context and a command name, this returns a
+        :class:`Command` object if it exists or returns `None`.
+        """
+        raise NotImplementedError()
+
+    def list_commands(self, ctx):
+        """Returns a list of subcommand names in the order they should
+        appear.
+        """
+        return []
+
+
+class Group(MultiCommand):
+    """A group allows a command to have subcommands attached.  This is the
+    most common way to implement nesting in Click.
+
+    :param commands: a dictionary of commands.
+    """
+
+    def __init__(self, name=None, commands=None, **attrs):
+        MultiCommand.__init__(self, name, **attrs)
+        #: the registered subcommands by their exported names.
+        self.commands = commands or {}
+
+    def add_command(self, cmd, name=None):
+        """Registers another :class:`Command` with this group.  If the name
+        is not provided, the name of the command is used.
+        """
+        name = name or cmd.name
+        if name is None:
+            raise TypeError("Command has no name.")
+        _check_multicommand(self, name, cmd, register=True)
+        self.commands[name] = cmd
+
+    def command(self, *args, **kwargs):
+        """A shortcut decorator for declaring and attaching a command to
+        the group.  This takes the same arguments as :func:`command` but
+        immediately registers the created command with this instance by
+        calling into :meth:`add_command`.
+        """
+        from .decorators import command
+
+        def decorator(f):
+            cmd = command(*args, **kwargs)(f)
+            self.add_command(cmd)
+            return cmd
+
+        return decorator
+
+    def group(self, *args, **kwargs):
+        """A shortcut decorator for declaring and attaching a group to
+        the group.  This takes the same arguments as :func:`group` but
+        immediately registers the created command with this instance by
+        calling into :meth:`add_command`.
+        """
+        from .decorators import group
+
+        def decorator(f):
+            cmd = group(*args, **kwargs)(f)
+            self.add_command(cmd)
+            return cmd
+
+        return decorator
+
+    def get_command(self, ctx, cmd_name):
+        return self.commands.get(cmd_name)
+
+    def list_commands(self, ctx):
+        return sorted(self.commands)
+
+
+class CommandCollection(MultiCommand):
+    """A command collection is a multi command that merges multiple multi
+    commands together into one.  This is a straightforward implementation
+    that accepts a list of different multi commands as sources and
+    provides all the commands for each of them.
+    """
+
+    def __init__(self, name=None, sources=None, **attrs):
+        MultiCommand.__init__(self, name, **attrs)
+        #: The list of registered multi commands.
+        self.sources = sources or []
+
+    def add_source(self, multi_cmd):
+        """Adds a new multi command to the chain dispatcher."""
+        self.sources.append(multi_cmd)
+
+    def get_command(self, ctx, cmd_name):
+        for source in self.sources:
+            rv = source.get_command(ctx, cmd_name)
+            if rv is not None:
+                if self.chain:
+                    _check_multicommand(self, cmd_name, rv)
+                return rv
+
+    def list_commands(self, ctx):
+        rv = set()
+        for source in self.sources:
+            rv.update(source.list_commands(ctx))
+        return sorted(rv)
+
+
+class Parameter(object):
+    r"""A parameter to a command comes in two versions: they are either
+    :class:`Option`\s or :class:`Argument`\s.  Other subclasses are currently
+    not supported by design as some of the internals for parsing are
+    intentionally not finalized.
+
+    Some settings are supported by both options and arguments.
+
+    :param param_decls: the parameter declarations for this option or
+                        argument.  This is a list of flags or argument
+                        names.
+    :param type: the type that should be used.  Either a :class:`ParamType`
+                 or a Python type.  The later is converted into the former
+                 automatically if supported.
+    :param required: controls if this is optional or not.
+    :param default: the default value if omitted.  This can also be a callable,
+                    in which case it's invoked when the default is needed
+                    without any arguments.
+    :param callback: a callback that should be executed after the parameter
+                     was matched.  This is called as ``fn(ctx, param,
+                     value)`` and needs to return the value.
+    :param nargs: the number of arguments to match.  If not ``1`` the return
+                  value is a tuple instead of single value.  The default for
+                  nargs is ``1`` (except if the type is a tuple, then it's
+                  the arity of the tuple).
+    :param metavar: how the value is represented in the help page.
+    :param expose_value: if this is `True` then the value is passed onwards
+                         to the command callback and stored on the context,
+                         otherwise it's skipped.
+    :param is_eager: eager values are processed before non eager ones.  This
+                     should not be set for arguments or it will inverse the
+                     order of processing.
+    :param envvar: a string or list of strings that are environment variables
+                   that should be checked.
+
+    .. versionchanged:: 7.1
+        Empty environment variables are ignored rather than taking the
+        empty string value. This makes it possible for scripts to clear
+        variables if they can't unset them.
+
+    .. versionchanged:: 2.0
+        Changed signature for parameter callback to also be passed the
+        parameter. The old callback format will still work, but it will
+        raise a warning to give you a chance to migrate the code easier.
+    """
+    param_type_name = "parameter"
+
+    def __init__(
+        self,
+        param_decls=None,
+        type=None,
+        required=False,
+        default=None,
+        callback=None,
+        nargs=None,
+        metavar=None,
+        expose_value=True,
+        is_eager=False,
+        envvar=None,
+        autocompletion=None,
+    ):
+        self.name, self.opts, self.secondary_opts = self._parse_decls(
+            param_decls or (), expose_value
+        )
+
+        self.type = convert_type(type, default)
+
+        # Default nargs to what the type tells us if we have that
+        # information available.
+        if nargs is None:
+            if self.type.is_composite:
+                nargs = self.type.arity
+            else:
+                nargs = 1
+
+        self.required = required
+        self.callback = callback
+        self.nargs = nargs
+        self.multiple = False
+        self.expose_value = expose_value
+        self.default = default
+        self.is_eager = is_eager
+        self.metavar = metavar
+        self.envvar = envvar
+        self.autocompletion = autocompletion
+
+    def __repr__(self):
+        return "<{} {}>".format(self.__class__.__name__, self.name)
+
+    @property
+    def human_readable_name(self):
+        """Returns the human readable name of this parameter.  This is the
+        same as the name for options, but the metavar for arguments.
+        """
+        return self.name
+
+    def make_metavar(self):
+        if self.metavar is not None:
+            return self.metavar
+        metavar = self.type.get_metavar(self)
+        if metavar is None:
+            metavar = self.type.name.upper()
+        if self.nargs != 1:
+            metavar += "..."
+        return metavar
+
+    def get_default(self, ctx):
+        """Given a context variable this calculates the default value."""
+        # Otherwise go with the regular default.
+        if callable(self.default):
+            rv = self.default()
+        else:
+            rv = self.default
+        return self.type_cast_value(ctx, rv)
+
+    def add_to_parser(self, parser, ctx):
+        pass
+
+    def consume_value(self, ctx, opts):
+        value = opts.get(self.name)
+        if value is None:
+            value = self.value_from_envvar(ctx)
+        if value is None:
+            value = ctx.lookup_default(self.name)
+        return value
+
+    def type_cast_value(self, ctx, value):
+        """Given a value this runs it properly through the type system.
+        This automatically handles things like `nargs` and `multiple` as
+        well as composite types.
+        """
+        if self.type.is_composite:
+            if self.nargs <= 1:
+                raise TypeError(
+                    "Attempted to invoke composite type but nargs has"
+                    " been set to {}. This is not supported; nargs"
+                    " needs to be set to a fixed value > 1.".format(self.nargs)
+                )
+            if self.multiple:
+                return tuple(self.type(x or (), self, ctx) for x in value or ())
+            return self.type(value or (), self, ctx)
+
+        def _convert(value, level):
+            if level == 0:
+                return self.type(value, self, ctx)
+            return tuple(_convert(x, level - 1) for x in value or ())
+
+        return _convert(value, (self.nargs != 1) + bool(self.multiple))
+
+    def process_value(self, ctx, value):
+        """Given a value and context this runs the logic to convert the
+        value as necessary.
+        """
+        # If the value we were given is None we do nothing.  This way
+        # code that calls this can easily figure out if something was
+        # not provided.  Otherwise it would be converted into an empty
+        # tuple for multiple invocations which is inconvenient.
+        if value is not None:
+            return self.type_cast_value(ctx, value)
+
+    def value_is_missing(self, value):
+        if value is None:
+            return True
+        if (self.nargs != 1 or self.multiple) and value == ():
+            return True
+        return False
+
+    def full_process_value(self, ctx, value):
+        value = self.process_value(ctx, value)
+
+        if value is None and not ctx.resilient_parsing:
+            value = self.get_default(ctx)
+
+        if self.required and self.value_is_missing(value):
+            raise MissingParameter(ctx=ctx, param=self)
+
+        return value
+
+    def resolve_envvar_value(self, ctx):
+        if self.envvar is None:
+            return
+        if isinstance(self.envvar, (tuple, list)):
+            for envvar in self.envvar:
+                rv = os.environ.get(envvar)
+                if rv is not None:
+                    return rv
+        else:
+            rv = os.environ.get(self.envvar)
+
+            if rv != "":
+                return rv
+
+    def value_from_envvar(self, ctx):
+        rv = self.resolve_envvar_value(ctx)
+        if rv is not None and self.nargs != 1:
+            rv = self.type.split_envvar_value(rv)
+        return rv
+
+    def handle_parse_result(self, ctx, opts, args):
+        with augment_usage_errors(ctx, param=self):
+            value = self.consume_value(ctx, opts)
+            try:
+                value = self.full_process_value(ctx, value)
+            except Exception:
+                if not ctx.resilient_parsing:
+                    raise
+                value = None
+            if self.callback is not None:
+                try:
+                    value = invoke_param_callback(self.callback, ctx, self, value)
+                except Exception:
+                    if not ctx.resilient_parsing:
+                        raise
+
+        if self.expose_value:
+            ctx.params[self.name] = value
+        return value, args
+
+    def get_help_record(self, ctx):
+        pass
+
+    def get_usage_pieces(self, ctx):
+        return []
+
+    def get_error_hint(self, ctx):
+        """Get a stringified version of the param for use in error messages to
+        indicate which param caused the error.
+        """
+        hint_list = self.opts or [self.human_readable_name]
+        return " / ".join(repr(x) for x in hint_list)
+
+
+class Option(Parameter):
+    """Options are usually optional values on the command line and
+    have some extra features that arguments don't have.
+
+    All other parameters are passed onwards to the parameter constructor.
+
+    :param show_default: controls if the default value should be shown on the
+                         help page. Normally, defaults are not shown. If this
+                         value is a string, it shows the string instead of the
+                         value. This is particularly useful for dynamic options.
+    :param show_envvar: controls if an environment variable should be shown on
+                        the help page.  Normally, environment variables
+                        are not shown.
+    :param prompt: if set to `True` or a non empty string then the user will be
+                   prompted for input.  If set to `True` the prompt will be the
+                   option name capitalized.
+    :param confirmation_prompt: if set then the value will need to be confirmed
+                                if it was prompted for.
+    :param hide_input: if this is `True` then the input on the prompt will be
+                       hidden from the user.  This is useful for password
+                       input.
+    :param is_flag: forces this option to act as a flag.  The default is
+                    auto detection.
+    :param flag_value: which value should be used for this flag if it's
+                       enabled.  This is set to a boolean automatically if
+                       the option string contains a slash to mark two options.
+    :param multiple: if this is set to `True` then the argument is accepted
+                     multiple times and recorded.  This is similar to ``nargs``
+                     in how it works but supports arbitrary number of
+                     arguments.
+    :param count: this flag makes an option increment an integer.
+    :param allow_from_autoenv: if this is enabled then the value of this
+                               parameter will be pulled from an environment
+                               variable in case a prefix is defined on the
+                               context.
+    :param help: the help string.
+    :param hidden: hide this option from help outputs.
+    """
+
+    param_type_name = "option"
+
+    def __init__(
+        self,
+        param_decls=None,
+        show_default=False,
+        prompt=False,
+        confirmation_prompt=False,
+        hide_input=False,
+        is_flag=None,
+        flag_value=None,
+        multiple=False,
+        count=False,
+        allow_from_autoenv=True,
+        type=None,
+        help=None,
+        hidden=False,
+        show_choices=True,
+        show_envvar=False,
+        **attrs
+    ):
+        default_is_missing = attrs.get("default", _missing) is _missing
+        Parameter.__init__(self, param_decls, type=type, **attrs)
+
+        if prompt is True:
+            prompt_text = self.name.replace("_", " ").capitalize()
+        elif prompt is False:
+            prompt_text = None
+        else:
+            prompt_text = prompt
+        self.prompt = prompt_text
+        self.confirmation_prompt = confirmation_prompt
+        self.hide_input = hide_input
+        self.hidden = hidden
+
+        # Flags
+        if is_flag is None:
+            if flag_value is not None:
+                is_flag = True
+            else:
+                is_flag = bool(self.secondary_opts)
+        if is_flag and default_is_missing:
+            self.default = False
+        if flag_value is None:
+            flag_value = not self.default
+        self.is_flag = is_flag
+        self.flag_value = flag_value
+        if self.is_flag and isinstance(self.flag_value, bool) and type in [None, bool]:
+            self.type = BOOL
+            self.is_bool_flag = True
+        else:
+            self.is_bool_flag = False
+
+        # Counting
+        self.count = count
+        if count:
+            if type is None:
+                self.type = IntRange(min=0)
+            if default_is_missing:
+                self.default = 0
+
+        self.multiple = multiple
+        self.allow_from_autoenv = allow_from_autoenv
+        self.help = help
+        self.show_default = show_default
+        self.show_choices = show_choices
+        self.show_envvar = show_envvar
+
+        # Sanity check for stuff we don't support
+        if __debug__:
+            if self.nargs < 0:
+                raise TypeError("Options cannot have nargs < 0")
+            if self.prompt and self.is_flag and not self.is_bool_flag:
+                raise TypeError("Cannot prompt for flags that are not bools.")
+            if not self.is_bool_flag and self.secondary_opts:
+                raise TypeError("Got secondary option for non boolean flag.")
+            if self.is_bool_flag and self.hide_input and self.prompt is not None:
+                raise TypeError("Hidden input does not work with boolean flag prompts.")
+            if self.count:
+                if self.multiple:
+                    raise TypeError(
+                        "Options cannot be multiple and count at the same time."
+                    )
+                elif self.is_flag:
+                    raise TypeError(
+                        "Options cannot be count and flags at the same time."
+                    )
+
+    def _parse_decls(self, decls, expose_value):
+        opts = []
+        secondary_opts = []
+        name = None
+        possible_names = []
+
+        for decl in decls:
+            if isidentifier(decl):
+                if name is not None:
+                    raise TypeError("Name defined twice")
+                name = decl
+            else:
+                split_char = ";" if decl[:1] == "/" else "/"
+                if split_char in decl:
+                    first, second = decl.split(split_char, 1)
+                    first = first.rstrip()
+                    if first:
+                        possible_names.append(split_opt(first))
+                        opts.append(first)
+                    second = second.lstrip()
+                    if second:
+                        secondary_opts.append(second.lstrip())
+                else:
+                    possible_names.append(split_opt(decl))
+                    opts.append(decl)
+
+        if name is None and possible_names:
+            possible_names.sort(key=lambda x: -len(x[0]))  # group long options first
+            name = possible_names[0][1].replace("-", "_").lower()
+            if not isidentifier(name):
+                name = None
+
+        if name is None:
+            if not expose_value:
+                return None, opts, secondary_opts
+            raise TypeError("Could not determine name for option")
+
+        if not opts and not secondary_opts:
+            raise TypeError(
+                "No options defined but a name was passed ({}). Did you"
+                " mean to declare an argument instead of an option?".format(name)
+            )
+
+        return name, opts, secondary_opts
+
+    def add_to_parser(self, parser, ctx):
+        kwargs = {
+            "dest": self.name,
+            "nargs": self.nargs,
+            "obj": self,
+        }
+
+        if self.multiple:
+            action = "append"
+        elif self.count:
+            action = "count"
+        else:
+            action = "store"
+
+        if self.is_flag:
+            kwargs.pop("nargs", None)
+            action_const = "{}_const".format(action)
+            if self.is_bool_flag and self.secondary_opts:
+                parser.add_option(self.opts, action=action_const, const=True, **kwargs)
+                parser.add_option(
+                    self.secondary_opts, action=action_const, const=False, **kwargs
+                )
+            else:
+                parser.add_option(
+                    self.opts, action=action_const, const=self.flag_value, **kwargs
+                )
+        else:
+            kwargs["action"] = action
+            parser.add_option(self.opts, **kwargs)
+
+    def get_help_record(self, ctx):
+        if self.hidden:
+            return
+        any_prefix_is_slash = []
+
+        def _write_opts(opts):
+            rv, any_slashes = join_options(opts)
+            if any_slashes:
+                any_prefix_is_slash[:] = [True]
+            if not self.is_flag and not self.count:
+                rv += " {}".format(self.make_metavar())
+            return rv
+
+        rv = [_write_opts(self.opts)]
+        if self.secondary_opts:
+            rv.append(_write_opts(self.secondary_opts))
+
+        help = self.help or ""
+        extra = []
+        if self.show_envvar:
+            envvar = self.envvar
+            if envvar is None:
+                if self.allow_from_autoenv and ctx.auto_envvar_prefix is not None:
+                    envvar = "{}_{}".format(ctx.auto_envvar_prefix, self.name.upper())
+            if envvar is not None:
+                extra.append(
+                    "env var: {}".format(
+                        ", ".join(str(d) for d in envvar)
+                        if isinstance(envvar, (list, tuple))
+                        else envvar
+                    )
+                )
+        if self.default is not None and (self.show_default or ctx.show_default):
+            if isinstance(self.show_default, string_types):
+                default_string = "({})".format(self.show_default)
+            elif isinstance(self.default, (list, tuple)):
+                default_string = ", ".join(str(d) for d in self.default)
+            elif inspect.isfunction(self.default):
+                default_string = "(dynamic)"
+            else:
+                default_string = self.default
+            extra.append("default: {}".format(default_string))
+
+        if self.required:
+            extra.append("required")
+        if extra:
+            help = "{}[{}]".format(
+                "{}  ".format(help) if help else "", "; ".join(extra)
+            )
+
+        return ("; " if any_prefix_is_slash else " / ").join(rv), help
+
+    def get_default(self, ctx):
+        # If we're a non boolean flag our default is more complex because
+        # we need to look at all flags in the same group to figure out
+        # if we're the the default one in which case we return the flag
+        # value as default.
+        if self.is_flag and not self.is_bool_flag:
+            for param in ctx.command.params:
+                if param.name == self.name and param.default:
+                    return param.flag_value
+            return None
+        return Parameter.get_default(self, ctx)
+
+    def prompt_for_value(self, ctx):
+        """This is an alternative flow that can be activated in the full
+        value processing if a value does not exist.  It will prompt the
+        user until a valid value exists and then returns the processed
+        value as result.
+        """
+        # Calculate the default before prompting anything to be stable.
+        default = self.get_default(ctx)
+
+        # If this is a prompt for a flag we need to handle this
+        # differently.
+        if self.is_bool_flag:
+            return confirm(self.prompt, default)
+
+        return prompt(
+            self.prompt,
+            default=default,
+            type=self.type,
+            hide_input=self.hide_input,
+            show_choices=self.show_choices,
+            confirmation_prompt=self.confirmation_prompt,
+            value_proc=lambda x: self.process_value(ctx, x),
+        )
+
+    def resolve_envvar_value(self, ctx):
+        rv = Parameter.resolve_envvar_value(self, ctx)
+        if rv is not None:
+            return rv
+        if self.allow_from_autoenv and ctx.auto_envvar_prefix is not None:
+            envvar = "{}_{}".format(ctx.auto_envvar_prefix, self.name.upper())
+            return os.environ.get(envvar)
+
+    def value_from_envvar(self, ctx):
+        rv = self.resolve_envvar_value(ctx)
+        if rv is None:
+            return None
+        value_depth = (self.nargs != 1) + bool(self.multiple)
+        if value_depth > 0 and rv is not None:
+            rv = self.type.split_envvar_value(rv)
+            if self.multiple and self.nargs != 1:
+                rv = batch(rv, self.nargs)
+        return rv
+
+    def full_process_value(self, ctx, value):
+        if value is None and self.prompt is not None and not ctx.resilient_parsing:
+            return self.prompt_for_value(ctx)
+        return Parameter.full_process_value(self, ctx, value)
+
+
+class Argument(Parameter):
+    """Arguments are positional parameters to a command.  They generally
+    provide fewer features than options but can have infinite ``nargs``
+    and are required by default.
+
+    All parameters are passed onwards to the parameter constructor.
+    """
+
+    param_type_name = "argument"
+
+    def __init__(self, param_decls, required=None, **attrs):
+        if required is None:
+            if attrs.get("default") is not None:
+                required = False
+            else:
+                required = attrs.get("nargs", 1) > 0
+        Parameter.__init__(self, param_decls, required=required, **attrs)
+        if self.default is not None and self.nargs < 0:
+            raise TypeError(
+                "nargs=-1 in combination with a default value is not supported."
+            )
+
+    @property
+    def human_readable_name(self):
+        if self.metavar is not None:
+            return self.metavar
+        return self.name.upper()
+
+    def make_metavar(self):
+        if self.metavar is not None:
+            return self.metavar
+        var = self.type.get_metavar(self)
+        if not var:
+            var = self.name.upper()
+        if not self.required:
+            var = "[{}]".format(var)
+        if self.nargs != 1:
+            var += "..."
+        return var
+
+    def _parse_decls(self, decls, expose_value):
+        if not decls:
+            if not expose_value:
+                return None, [], []
+            raise TypeError("Could not determine name for argument")
+        if len(decls) == 1:
+            name = arg = decls[0]
+            name = name.replace("-", "_").lower()
+        else:
+            raise TypeError(
+                "Arguments take exactly one parameter declaration, got"
+                " {}".format(len(decls))
+            )
+        return name, [arg], []
+
+    def get_usage_pieces(self, ctx):
+        return [self.make_metavar()]
+
+    def get_error_hint(self, ctx):
+        return repr(self.make_metavar())
+
+    def add_to_parser(self, parser, ctx):
+        parser.add_argument(dest=self.name, nargs=self.nargs, obj=self)
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/decorators.py b/python3-vckonline/lib/python3.8/site-packages/click/decorators.py
new file mode 100644
index 0000000..c7b5af6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/decorators.py
@@ -0,0 +1,333 @@
+import inspect
+import sys
+from functools import update_wrapper
+
+from ._compat import iteritems
+from ._unicodefun import _check_for_unicode_literals
+from .core import Argument
+from .core import Command
+from .core import Group
+from .core import Option
+from .globals import get_current_context
+from .utils import echo
+
+
+def pass_context(f):
+    """Marks a callback as wanting to receive the current context
+    object as first argument.
+    """
+
+    def new_func(*args, **kwargs):
+        return f(get_current_context(), *args, **kwargs)
+
+    return update_wrapper(new_func, f)
+
+
+def pass_obj(f):
+    """Similar to :func:`pass_context`, but only pass the object on the
+    context onwards (:attr:`Context.obj`).  This is useful if that object
+    represents the state of a nested system.
+    """
+
+    def new_func(*args, **kwargs):
+        return f(get_current_context().obj, *args, **kwargs)
+
+    return update_wrapper(new_func, f)
+
+
+def make_pass_decorator(object_type, ensure=False):
+    """Given an object type this creates a decorator that will work
+    similar to :func:`pass_obj` but instead of passing the object of the
+    current context, it will find the innermost context of type
+    :func:`object_type`.
+
+    This generates a decorator that works roughly like this::
+
+        from functools import update_wrapper
+
+        def decorator(f):
+            @pass_context
+            def new_func(ctx, *args, **kwargs):
+                obj = ctx.find_object(object_type)
+                return ctx.invoke(f, obj, *args, **kwargs)
+            return update_wrapper(new_func, f)
+        return decorator
+
+    :param object_type: the type of the object to pass.
+    :param ensure: if set to `True`, a new object will be created and
+                   remembered on the context if it's not there yet.
+    """
+
+    def decorator(f):
+        def new_func(*args, **kwargs):
+            ctx = get_current_context()
+            if ensure:
+                obj = ctx.ensure_object(object_type)
+            else:
+                obj = ctx.find_object(object_type)
+            if obj is None:
+                raise RuntimeError(
+                    "Managed to invoke callback without a context"
+                    " object of type '{}' existing".format(object_type.__name__)
+                )
+            return ctx.invoke(f, obj, *args, **kwargs)
+
+        return update_wrapper(new_func, f)
+
+    return decorator
+
+
+def _make_command(f, name, attrs, cls):
+    if isinstance(f, Command):
+        raise TypeError("Attempted to convert a callback into a command twice.")
+    try:
+        params = f.__click_params__
+        params.reverse()
+        del f.__click_params__
+    except AttributeError:
+        params = []
+    help = attrs.get("help")
+    if help is None:
+        help = inspect.getdoc(f)
+        if isinstance(help, bytes):
+            help = help.decode("utf-8")
+    else:
+        help = inspect.cleandoc(help)
+    attrs["help"] = help
+    _check_for_unicode_literals()
+    return cls(
+        name=name or f.__name__.lower().replace("_", "-"),
+        callback=f,
+        params=params,
+        **attrs
+    )
+
+
+def command(name=None, cls=None, **attrs):
+    r"""Creates a new :class:`Command` and uses the decorated function as
+    callback.  This will also automatically attach all decorated
+    :func:`option`\s and :func:`argument`\s as parameters to the command.
+
+    The name of the command defaults to the name of the function with
+    underscores replaced by dashes.  If you want to change that, you can
+    pass the intended name as the first argument.
+
+    All keyword arguments are forwarded to the underlying command class.
+
+    Once decorated the function turns into a :class:`Command` instance
+    that can be invoked as a command line utility or be attached to a
+    command :class:`Group`.
+
+    :param name: the name of the command.  This defaults to the function
+                 name with underscores replaced by dashes.
+    :param cls: the command class to instantiate.  This defaults to
+                :class:`Command`.
+    """
+    if cls is None:
+        cls = Command
+
+    def decorator(f):
+        cmd = _make_command(f, name, attrs, cls)
+        cmd.__doc__ = f.__doc__
+        return cmd
+
+    return decorator
+
+
+def group(name=None, **attrs):
+    """Creates a new :class:`Group` with a function as callback.  This
+    works otherwise the same as :func:`command` just that the `cls`
+    parameter is set to :class:`Group`.
+    """
+    attrs.setdefault("cls", Group)
+    return command(name, **attrs)
+
+
+def _param_memo(f, param):
+    if isinstance(f, Command):
+        f.params.append(param)
+    else:
+        if not hasattr(f, "__click_params__"):
+            f.__click_params__ = []
+        f.__click_params__.append(param)
+
+
+def argument(*param_decls, **attrs):
+    """Attaches an argument to the command.  All positional arguments are
+    passed as parameter declarations to :class:`Argument`; all keyword
+    arguments are forwarded unchanged (except ``cls``).
+    This is equivalent to creating an :class:`Argument` instance manually
+    and attaching it to the :attr:`Command.params` list.
+
+    :param cls: the argument class to instantiate.  This defaults to
+                :class:`Argument`.
+    """
+
+    def decorator(f):
+        ArgumentClass = attrs.pop("cls", Argument)
+        _param_memo(f, ArgumentClass(param_decls, **attrs))
+        return f
+
+    return decorator
+
+
+def option(*param_decls, **attrs):
+    """Attaches an option to the command.  All positional arguments are
+    passed as parameter declarations to :class:`Option`; all keyword
+    arguments are forwarded unchanged (except ``cls``).
+    This is equivalent to creating an :class:`Option` instance manually
+    and attaching it to the :attr:`Command.params` list.
+
+    :param cls: the option class to instantiate.  This defaults to
+                :class:`Option`.
+    """
+
+    def decorator(f):
+        # Issue 926, copy attrs, so pre-defined options can re-use the same cls=
+        option_attrs = attrs.copy()
+
+        if "help" in option_attrs:
+            option_attrs["help"] = inspect.cleandoc(option_attrs["help"])
+        OptionClass = option_attrs.pop("cls", Option)
+        _param_memo(f, OptionClass(param_decls, **option_attrs))
+        return f
+
+    return decorator
+
+
+def confirmation_option(*param_decls, **attrs):
+    """Shortcut for confirmation prompts that can be ignored by passing
+    ``--yes`` as parameter.
+
+    This is equivalent to decorating a function with :func:`option` with
+    the following parameters::
+
+        def callback(ctx, param, value):
+            if not value:
+                ctx.abort()
+
+        @click.command()
+        @click.option('--yes', is_flag=True, callback=callback,
+                      expose_value=False, prompt='Do you want to continue?')
+        def dropdb():
+            pass
+    """
+
+    def decorator(f):
+        def callback(ctx, param, value):
+            if not value:
+                ctx.abort()
+
+        attrs.setdefault("is_flag", True)
+        attrs.setdefault("callback", callback)
+        attrs.setdefault("expose_value", False)
+        attrs.setdefault("prompt", "Do you want to continue?")
+        attrs.setdefault("help", "Confirm the action without prompting.")
+        return option(*(param_decls or ("--yes",)), **attrs)(f)
+
+    return decorator
+
+
+def password_option(*param_decls, **attrs):
+    """Shortcut for password prompts.
+
+    This is equivalent to decorating a function with :func:`option` with
+    the following parameters::
+
+        @click.command()
+        @click.option('--password', prompt=True, confirmation_prompt=True,
+                      hide_input=True)
+        def changeadmin(password):
+            pass
+    """
+
+    def decorator(f):
+        attrs.setdefault("prompt", True)
+        attrs.setdefault("confirmation_prompt", True)
+        attrs.setdefault("hide_input", True)
+        return option(*(param_decls or ("--password",)), **attrs)(f)
+
+    return decorator
+
+
+def version_option(version=None, *param_decls, **attrs):
+    """Adds a ``--version`` option which immediately ends the program
+    printing out the version number.  This is implemented as an eager
+    option that prints the version and exits the program in the callback.
+
+    :param version: the version number to show.  If not provided Click
+                    attempts an auto discovery via setuptools.
+    :param prog_name: the name of the program (defaults to autodetection)
+    :param message: custom message to show instead of the default
+                    (``'%(prog)s, version %(version)s'``)
+    :param others: everything else is forwarded to :func:`option`.
+    """
+    if version is None:
+        if hasattr(sys, "_getframe"):
+            module = sys._getframe(1).f_globals.get("__name__")
+        else:
+            module = ""
+
+    def decorator(f):
+        prog_name = attrs.pop("prog_name", None)
+        message = attrs.pop("message", "%(prog)s, version %(version)s")
+
+        def callback(ctx, param, value):
+            if not value or ctx.resilient_parsing:
+                return
+            prog = prog_name
+            if prog is None:
+                prog = ctx.find_root().info_name
+            ver = version
+            if ver is None:
+                try:
+                    import pkg_resources
+                except ImportError:
+                    pass
+                else:
+                    for dist in pkg_resources.working_set:
+                        scripts = dist.get_entry_map().get("console_scripts") or {}
+                        for _, entry_point in iteritems(scripts):
+                            if entry_point.module_name == module:
+                                ver = dist.version
+                                break
+                if ver is None:
+                    raise RuntimeError("Could not determine version")
+            echo(message % {"prog": prog, "version": ver}, color=ctx.color)
+            ctx.exit()
+
+        attrs.setdefault("is_flag", True)
+        attrs.setdefault("expose_value", False)
+        attrs.setdefault("is_eager", True)
+        attrs.setdefault("help", "Show the version and exit.")
+        attrs["callback"] = callback
+        return option(*(param_decls or ("--version",)), **attrs)(f)
+
+    return decorator
+
+
+def help_option(*param_decls, **attrs):
+    """Adds a ``--help`` option which immediately ends the program
+    printing out the help page.  This is usually unnecessary to add as
+    this is added by default to all commands unless suppressed.
+
+    Like :func:`version_option`, this is implemented as eager option that
+    prints in the callback and exits.
+
+    All arguments are forwarded to :func:`option`.
+    """
+
+    def decorator(f):
+        def callback(ctx, param, value):
+            if value and not ctx.resilient_parsing:
+                echo(ctx.get_help(), color=ctx.color)
+                ctx.exit()
+
+        attrs.setdefault("is_flag", True)
+        attrs.setdefault("expose_value", False)
+        attrs.setdefault("help", "Show this message and exit.")
+        attrs.setdefault("is_eager", True)
+        attrs["callback"] = callback
+        return option(*(param_decls or ("--help",)), **attrs)(f)
+
+    return decorator
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/exceptions.py b/python3-vckonline/lib/python3.8/site-packages/click/exceptions.py
new file mode 100644
index 0000000..592ee38
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/exceptions.py
@@ -0,0 +1,253 @@
+from ._compat import filename_to_ui
+from ._compat import get_text_stderr
+from ._compat import PY2
+from .utils import echo
+
+
+def _join_param_hints(param_hint):
+    if isinstance(param_hint, (tuple, list)):
+        return " / ".join(repr(x) for x in param_hint)
+    return param_hint
+
+
+class ClickException(Exception):
+    """An exception that Click can handle and show to the user."""
+
+    #: The exit code for this exception
+    exit_code = 1
+
+    def __init__(self, message):
+        ctor_msg = message
+        if PY2:
+            if ctor_msg is not None:
+                ctor_msg = ctor_msg.encode("utf-8")
+        Exception.__init__(self, ctor_msg)
+        self.message = message
+
+    def format_message(self):
+        return self.message
+
+    def __str__(self):
+        return self.message
+
+    if PY2:
+        __unicode__ = __str__
+
+        def __str__(self):
+            return self.message.encode("utf-8")
+
+    def show(self, file=None):
+        if file is None:
+            file = get_text_stderr()
+        echo("Error: {}".format(self.format_message()), file=file)
+
+
+class UsageError(ClickException):
+    """An internal exception that signals a usage error.  This typically
+    aborts any further handling.
+
+    :param message: the error message to display.
+    :param ctx: optionally the context that caused this error.  Click will
+                fill in the context automatically in some situations.
+    """
+
+    exit_code = 2
+
+    def __init__(self, message, ctx=None):
+        ClickException.__init__(self, message)
+        self.ctx = ctx
+        self.cmd = self.ctx.command if self.ctx else None
+
+    def show(self, file=None):
+        if file is None:
+            file = get_text_stderr()
+        color = None
+        hint = ""
+        if self.cmd is not None and self.cmd.get_help_option(self.ctx) is not None:
+            hint = "Try '{} {}' for help.\n".format(
+                self.ctx.command_path, self.ctx.help_option_names[0]
+            )
+        if self.ctx is not None:
+            color = self.ctx.color
+            echo("{}\n{}".format(self.ctx.get_usage(), hint), file=file, color=color)
+        echo("Error: {}".format(self.format_message()), file=file, color=color)
+
+
+class BadParameter(UsageError):
+    """An exception that formats out a standardized error message for a
+    bad parameter.  This is useful when thrown from a callback or type as
+    Click will attach contextual information to it (for instance, which
+    parameter it is).
+
+    .. versionadded:: 2.0
+
+    :param param: the parameter object that caused this error.  This can
+                  be left out, and Click will attach this info itself
+                  if possible.
+    :param param_hint: a string that shows up as parameter name.  This
+                       can be used as alternative to `param` in cases
+                       where custom validation should happen.  If it is
+                       a string it's used as such, if it's a list then
+                       each item is quoted and separated.
+    """
+
+    def __init__(self, message, ctx=None, param=None, param_hint=None):
+        UsageError.__init__(self, message, ctx)
+        self.param = param
+        self.param_hint = param_hint
+
+    def format_message(self):
+        if self.param_hint is not None:
+            param_hint = self.param_hint
+        elif self.param is not None:
+            param_hint = self.param.get_error_hint(self.ctx)
+        else:
+            return "Invalid value: {}".format(self.message)
+        param_hint = _join_param_hints(param_hint)
+
+        return "Invalid value for {}: {}".format(param_hint, self.message)
+
+
+class MissingParameter(BadParameter):
+    """Raised if click required an option or argument but it was not
+    provided when invoking the script.
+
+    .. versionadded:: 4.0
+
+    :param param_type: a string that indicates the type of the parameter.
+                       The default is to inherit the parameter type from
+                       the given `param`.  Valid values are ``'parameter'``,
+                       ``'option'`` or ``'argument'``.
+    """
+
+    def __init__(
+        self, message=None, ctx=None, param=None, param_hint=None, param_type=None
+    ):
+        BadParameter.__init__(self, message, ctx, param, param_hint)
+        self.param_type = param_type
+
+    def format_message(self):
+        if self.param_hint is not None:
+            param_hint = self.param_hint
+        elif self.param is not None:
+            param_hint = self.param.get_error_hint(self.ctx)
+        else:
+            param_hint = None
+        param_hint = _join_param_hints(param_hint)
+
+        param_type = self.param_type
+        if param_type is None and self.param is not None:
+            param_type = self.param.param_type_name
+
+        msg = self.message
+        if self.param is not None:
+            msg_extra = self.param.type.get_missing_message(self.param)
+            if msg_extra:
+                if msg:
+                    msg += ".  {}".format(msg_extra)
+                else:
+                    msg = msg_extra
+
+        return "Missing {}{}{}{}".format(
+            param_type,
+            " {}".format(param_hint) if param_hint else "",
+            ".  " if msg else ".",
+            msg or "",
+        )
+
+    def __str__(self):
+        if self.message is None:
+            param_name = self.param.name if self.param else None
+            return "missing parameter: {}".format(param_name)
+        else:
+            return self.message
+
+    if PY2:
+        __unicode__ = __str__
+
+        def __str__(self):
+            return self.__unicode__().encode("utf-8")
+
+
+class NoSuchOption(UsageError):
+    """Raised if click attempted to handle an option that does not
+    exist.
+
+    .. versionadded:: 4.0
+    """
+
+    def __init__(self, option_name, message=None, possibilities=None, ctx=None):
+        if message is None:
+            message = "no such option: {}".format(option_name)
+        UsageError.__init__(self, message, ctx)
+        self.option_name = option_name
+        self.possibilities = possibilities
+
+    def format_message(self):
+        bits = [self.message]
+        if self.possibilities:
+            if len(self.possibilities) == 1:
+                bits.append("Did you mean {}?".format(self.possibilities[0]))
+            else:
+                possibilities = sorted(self.possibilities)
+                bits.append("(Possible options: {})".format(", ".join(possibilities)))
+        return "  ".join(bits)
+
+
+class BadOptionUsage(UsageError):
+    """Raised if an option is generally supplied but the use of the option
+    was incorrect.  This is for instance raised if the number of arguments
+    for an option is not correct.
+
+    .. versionadded:: 4.0
+
+    :param option_name: the name of the option being used incorrectly.
+    """
+
+    def __init__(self, option_name, message, ctx=None):
+        UsageError.__init__(self, message, ctx)
+        self.option_name = option_name
+
+
+class BadArgumentUsage(UsageError):
+    """Raised if an argument is generally supplied but the use of the argument
+    was incorrect.  This is for instance raised if the number of values
+    for an argument is not correct.
+
+    .. versionadded:: 6.0
+    """
+
+    def __init__(self, message, ctx=None):
+        UsageError.__init__(self, message, ctx)
+
+
+class FileError(ClickException):
+    """Raised if a file cannot be opened."""
+
+    def __init__(self, filename, hint=None):
+        ui_filename = filename_to_ui(filename)
+        if hint is None:
+            hint = "unknown error"
+        ClickException.__init__(self, hint)
+        self.ui_filename = ui_filename
+        self.filename = filename
+
+    def format_message(self):
+        return "Could not open file {}: {}".format(self.ui_filename, self.message)
+
+
+class Abort(RuntimeError):
+    """An internal signalling exception that signals Click to abort."""
+
+
+class Exit(RuntimeError):
+    """An exception that indicates that the application should exit with some
+    status code.
+
+    :param code: the status code to exit with.
+    """
+
+    __slots__ = ("exit_code",)
+
+    def __init__(self, code=0):
+        self.exit_code = code
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/formatting.py b/python3-vckonline/lib/python3.8/site-packages/click/formatting.py
new file mode 100644
index 0000000..319c7f6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/formatting.py
@@ -0,0 +1,283 @@
+from contextlib import contextmanager
+
+from ._compat import term_len
+from .parser import split_opt
+from .termui import get_terminal_size
+
+# Can force a width.  This is used by the test system
+FORCED_WIDTH = None
+
+
+def measure_table(rows):
+    widths = {}
+    for row in rows:
+        for idx, col in enumerate(row):
+            widths[idx] = max(widths.get(idx, 0), term_len(col))
+    return tuple(y for x, y in sorted(widths.items()))
+
+
+def iter_rows(rows, col_count):
+    for row in rows:
+        row = tuple(row)
+        yield row + ("",) * (col_count - len(row))
+
+
+def wrap_text(
+    text, width=78, initial_indent="", subsequent_indent="", preserve_paragraphs=False
+):
+    """A helper function that intelligently wraps text.  By default, it
+    assumes that it operates on a single paragraph of text but if the
+    `preserve_paragraphs` parameter is provided it will intelligently
+    handle paragraphs (defined by two empty lines).
+
+    If paragraphs are handled, a paragraph can be prefixed with an empty
+    line containing the ``\\b`` character (``\\x08``) to indicate that
+    no rewrapping should happen in that block.
+
+    :param text: the text that should be rewrapped.
+    :param width: the maximum width for the text.
+    :param initial_indent: the initial indent that should be placed on the
+                           first line as a string.
+    :param subsequent_indent: the indent string that should be placed on
+                              each consecutive line.
+    :param preserve_paragraphs: if this flag is set then the wrapping will
+                                intelligently handle paragraphs.
+    """
+    from ._textwrap import TextWrapper
+
+    text = text.expandtabs()
+    wrapper = TextWrapper(
+        width,
+        initial_indent=initial_indent,
+        subsequent_indent=subsequent_indent,
+        replace_whitespace=False,
+    )
+    if not preserve_paragraphs:
+        return wrapper.fill(text)
+
+    p = []
+    buf = []
+    indent = None
+
+    def _flush_par():
+        if not buf:
+            return
+        if buf[0].strip() == "\b":
+            p.append((indent or 0, True, "\n".join(buf[1:])))
+        else:
+            p.append((indent or 0, False, " ".join(buf)))
+        del buf[:]
+
+    for line in text.splitlines():
+        if not line:
+            _flush_par()
+            indent = None
+        else:
+            if indent is None:
+                orig_len = term_len(line)
+                line = line.lstrip()
+                indent = orig_len - term_len(line)
+            buf.append(line)
+    _flush_par()
+
+    rv = []
+    for indent, raw, text in p:
+        with wrapper.extra_indent(" " * indent):
+            if raw:
+                rv.append(wrapper.indent_only(text))
+            else:
+                rv.append(wrapper.fill(text))
+
+    return "\n\n".join(rv)
+
+
+class HelpFormatter(object):
+    """This class helps with formatting text-based help pages.  It's
+    usually just needed for very special internal cases, but it's also
+    exposed so that developers can write their own fancy outputs.
+
+    At present, it always writes into memory.
+
+    :param indent_increment: the additional increment for each level.
+    :param width: the width for the text.  This defaults to the terminal
+                  width clamped to a maximum of 78.
+    """
+
+    def __init__(self, indent_increment=2, width=None, max_width=None):
+        self.indent_increment = indent_increment
+        if max_width is None:
+            max_width = 80
+        if width is None:
+            width = FORCED_WIDTH
+            if width is None:
+                width = max(min(get_terminal_size()[0], max_width) - 2, 50)
+        self.width = width
+        self.current_indent = 0
+        self.buffer = []
+
+    def write(self, string):
+        """Writes a unicode string into the internal buffer."""
+        self.buffer.append(string)
+
+    def indent(self):
+        """Increases the indentation."""
+        self.current_indent += self.indent_increment
+
+    def dedent(self):
+        """Decreases the indentation."""
+        self.current_indent -= self.indent_increment
+
+    def write_usage(self, prog, args="", prefix="Usage: "):
+        """Writes a usage line into the buffer.
+
+        :param prog: the program name.
+        :param args: whitespace separated list of arguments.
+        :param prefix: the prefix for the first line.
+        """
+        usage_prefix = "{:>{w}}{} ".format(prefix, prog, w=self.current_indent)
+        text_width = self.width - self.current_indent
+
+        if text_width >= (term_len(usage_prefix) + 20):
+            # The arguments will fit to the right of the prefix.
+            indent = " " * term_len(usage_prefix)
+            self.write(
+                wrap_text(
+                    args,
+                    text_width,
+                    initial_indent=usage_prefix,
+                    subsequent_indent=indent,
+                )
+            )
+        else:
+            # The prefix is too long, put the arguments on the next line.
+            self.write(usage_prefix)
+            self.write("\n")
+            indent = " " * (max(self.current_indent, term_len(prefix)) + 4)
+            self.write(
+                wrap_text(
+                    args, text_width, initial_indent=indent, subsequent_indent=indent
+                )
+            )
+
+        self.write("\n")
+
+    def write_heading(self, heading):
+        """Writes a heading into the buffer."""
+        self.write("{:>{w}}{}:\n".format("", heading, w=self.current_indent))
+
+    def write_paragraph(self):
+        """Writes a paragraph into the buffer."""
+        if self.buffer:
+            self.write("\n")
+
+    def write_text(self, text):
+        """Writes re-indented text into the buffer.  This rewraps and
+        preserves paragraphs.
+        """
+        text_width = max(self.width - self.current_indent, 11)
+        indent = " " * self.current_indent
+        self.write(
+            wrap_text(
+                text,
+                text_width,
+                initial_indent=indent,
+                subsequent_indent=indent,
+                preserve_paragraphs=True,
+            )
+        )
+        self.write("\n")
+
+    def write_dl(self, rows, col_max=30, col_spacing=2):
+        """Writes a definition list into the buffer.  This is how options
+        and commands are usually formatted.
+
+        :param rows: a list of two item tuples for the terms and values.
+        :param col_max: the maximum width of the first column.
+        :param col_spacing: the number of spaces between the first and
+                            second column.
+        """
+        rows = list(rows)
+        widths = measure_table(rows)
+        if len(widths) != 2:
+            raise TypeError("Expected two columns for definition list")
+
+        first_col = min(widths[0], col_max) + col_spacing
+
+        for first, second in iter_rows(rows, len(widths)):
+            self.write("{:>{w}}{}".format("", first, w=self.current_indent))
+            if not second:
+                self.write("\n")
+                continue
+            if term_len(first) <= first_col - col_spacing:
+                self.write(" " * (first_col - term_len(first)))
+            else:
+                self.write("\n")
+                self.write(" " * (first_col + self.current_indent))
+
+            text_width = max(self.width - first_col - 2, 10)
+            wrapped_text = wrap_text(second, text_width, preserve_paragraphs=True)
+            lines = wrapped_text.splitlines()
+
+            if lines:
+                self.write("{}\n".format(lines[0]))
+
+                for line in lines[1:]:
+                    self.write(
+                        "{:>{w}}{}\n".format(
+                            "", line, w=first_col + self.current_indent
+                        )
+                    )
+
+                if len(lines) > 1:
+                    # separate long help from next option
+                    self.write("\n")
+            else:
+                self.write("\n")
+
+    @contextmanager
+    def section(self, name):
+        """Helpful context manager that writes a paragraph, a heading,
+        and the indents.
+
+        :param name: the section name that is written as heading.
+        """
+        self.write_paragraph()
+        self.write_heading(name)
+        self.indent()
+        try:
+            yield
+        finally:
+            self.dedent()
+
+    @contextmanager
+    def indentation(self):
+        """A context manager that increases the indentation."""
+        self.indent()
+        try:
+            yield
+        finally:
+            self.dedent()
+
+    def getvalue(self):
+        """Returns the buffer contents."""
+        return "".join(self.buffer)
+
+
+def join_options(options):
+    """Given a list of option strings this joins them in the most appropriate
+    way and returns them in the form ``(formatted_string,
+    any_prefix_is_slash)`` where the second item in the tuple is a flag that
+    indicates if any of the option prefixes was a slash.
+    """
+    rv = []
+    any_prefix_is_slash = False
+    for opt in options:
+        prefix = split_opt(opt)[0]
+        if prefix == "/":
+            any_prefix_is_slash = True
+        rv.append((len(prefix), opt))
+
+    rv.sort(key=lambda x: x[0])
+
+    rv = ", ".join(x[1] for x in rv)
+    return rv, any_prefix_is_slash
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/globals.py b/python3-vckonline/lib/python3.8/site-packages/click/globals.py
new file mode 100644
index 0000000..1649f9a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/globals.py
@@ -0,0 +1,47 @@
+from threading import local
+
+_local = local()
+
+
+def get_current_context(silent=False):
+    """Returns the current click context.  This can be used as a way to
+    access the current context object from anywhere.  This is a more implicit
+    alternative to the :func:`pass_context` decorator.  This function is
+    primarily useful for helpers such as :func:`echo` which might be
+    interested in changing its behavior based on the current context.
+
+    To push the current context, :meth:`Context.scope` can be used.
+
+    .. versionadded:: 5.0
+
+    :param silent: if set to `True` the return value is `None` if no context
+                   is available.  The default behavior is to raise a
+                   :exc:`RuntimeError`.
+    """
+    try:
+        return _local.stack[-1]
+    except (AttributeError, IndexError):
+        if not silent:
+            raise RuntimeError("There is no active click context.")
+
+
+def push_context(ctx):
+    """Pushes a new context to the current stack."""
+    _local.__dict__.setdefault("stack", []).append(ctx)
+
+
+def pop_context():
+    """Removes the top level from the stack."""
+    _local.stack.pop()
+
+
+def resolve_color_default(color=None):
+    """"Internal helper to get the default value of the color flag.  If a
+    value is passed it's returned unchanged, otherwise it's looked up from
+    the current context.
+    """
+    if color is not None:
+        return color
+    ctx = get_current_context(silent=True)
+    if ctx is not None:
+        return ctx.color
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/parser.py b/python3-vckonline/lib/python3.8/site-packages/click/parser.py
new file mode 100644
index 0000000..f43ebfe
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/parser.py
@@ -0,0 +1,428 @@
+# -*- coding: utf-8 -*-
+"""
+This module started out as largely a copy paste from the stdlib's
+optparse module with the features removed that we do not need from
+optparse because we implement them in Click on a higher level (for
+instance type handling, help formatting and a lot more).
+
+The plan is to remove more and more from here over time.
+
+The reason this is a different module and not optparse from the stdlib
+is that there are differences in 2.x and 3.x about the error messages
+generated and optparse in the stdlib uses gettext for no good reason
+and might cause us issues.
+
+Click uses parts of optparse written by Gregory P. Ward and maintained
+by the Python Software Foundation. This is limited to code in parser.py.
+
+Copyright 2001-2006 Gregory P. Ward. All rights reserved.
+Copyright 2002-2006 Python Software Foundation. All rights reserved.
+"""
+import re
+from collections import deque
+
+from .exceptions import BadArgumentUsage
+from .exceptions import BadOptionUsage
+from .exceptions import NoSuchOption
+from .exceptions import UsageError
+
+
+def _unpack_args(args, nargs_spec):
+    """Given an iterable of arguments and an iterable of nargs specifications,
+    it returns a tuple with all the unpacked arguments at the first index
+    and all remaining arguments as the second.
+
+    The nargs specification is the number of arguments that should be consumed
+    or `-1` to indicate that this position should eat up all the remainders.
+
+    Missing items are filled with `None`.
+    """
+    args = deque(args)
+    nargs_spec = deque(nargs_spec)
+    rv = []
+    spos = None
+
+    def _fetch(c):
+        try:
+            if spos is None:
+                return c.popleft()
+            else:
+                return c.pop()
+        except IndexError:
+            return None
+
+    while nargs_spec:
+        nargs = _fetch(nargs_spec)
+        if nargs == 1:
+            rv.append(_fetch(args))
+        elif nargs > 1:
+            x = [_fetch(args) for _ in range(nargs)]
+            # If we're reversed, we're pulling in the arguments in reverse,
+            # so we need to turn them around.
+            if spos is not None:
+                x.reverse()
+            rv.append(tuple(x))
+        elif nargs < 0:
+            if spos is not None:
+                raise TypeError("Cannot have two nargs < 0")
+            spos = len(rv)
+            rv.append(None)
+
+    # spos is the position of the wildcard (star).  If it's not `None`,
+    # we fill it with the remainder.
+    if spos is not None:
+        rv[spos] = tuple(args)
+        args = []
+        rv[spos + 1 :] = reversed(rv[spos + 1 :])
+
+    return tuple(rv), list(args)
+
+
+def _error_opt_args(nargs, opt):
+    if nargs == 1:
+        raise BadOptionUsage(opt, "{} option requires an argument".format(opt))
+    raise BadOptionUsage(opt, "{} option requires {} arguments".format(opt, nargs))
+
+
+def split_opt(opt):
+    first = opt[:1]
+    if first.isalnum():
+        return "", opt
+    if opt[1:2] == first:
+        return opt[:2], opt[2:]
+    return first, opt[1:]
+
+
+def normalize_opt(opt, ctx):
+    if ctx is None or ctx.token_normalize_func is None:
+        return opt
+    prefix, opt = split_opt(opt)
+    return prefix + ctx.token_normalize_func(opt)
+
+
+def split_arg_string(string):
+    """Given an argument string this attempts to split it into small parts."""
+    rv = []
+    for match in re.finditer(
+        r"('([^'\\]*(?:\\.[^'\\]*)*)'|\"([^\"\\]*(?:\\.[^\"\\]*)*)\"|\S+)\s*",
+        string,
+        re.S,
+    ):
+        arg = match.group().strip()
+        if arg[:1] == arg[-1:] and arg[:1] in "\"'":
+            arg = arg[1:-1].encode("ascii", "backslashreplace").decode("unicode-escape")
+        try:
+            arg = type(string)(arg)
+        except UnicodeError:
+            pass
+        rv.append(arg)
+    return rv
+
+
+class Option(object):
+    def __init__(self, opts, dest, action=None, nargs=1, const=None, obj=None):
+        self._short_opts = []
+        self._long_opts = []
+        self.prefixes = set()
+
+        for opt in opts:
+            prefix, value = split_opt(opt)
+            if not prefix:
+                raise ValueError("Invalid start character for option ({})".format(opt))
+            self.prefixes.add(prefix[0])
+            if len(prefix) == 1 and len(value) == 1:
+                self._short_opts.append(opt)
+            else:
+                self._long_opts.append(opt)
+                self.prefixes.add(prefix)
+
+        if action is None:
+            action = "store"
+
+        self.dest = dest
+        self.action = action
+        self.nargs = nargs
+        self.const = const
+        self.obj = obj
+
+    @property
+    def takes_value(self):
+        return self.action in ("store", "append")
+
+    def process(self, value, state):
+        if self.action == "store":
+            state.opts[self.dest] = value
+        elif self.action == "store_const":
+            state.opts[self.dest] = self.const
+        elif self.action == "append":
+            state.opts.setdefault(self.dest, []).append(value)
+        elif self.action == "append_const":
+            state.opts.setdefault(self.dest, []).append(self.const)
+        elif self.action == "count":
+            state.opts[self.dest] = state.opts.get(self.dest, 0) + 1
+        else:
+            raise ValueError("unknown action '{}'".format(self.action))
+        state.order.append(self.obj)
+
+
+class Argument(object):
+    def __init__(self, dest, nargs=1, obj=None):
+        self.dest = dest
+        self.nargs = nargs
+        self.obj = obj
+
+    def process(self, value, state):
+        if self.nargs > 1:
+            holes = sum(1 for x in value if x is None)
+            if holes == len(value):
+                value = None
+            elif holes != 0:
+                raise BadArgumentUsage(
+                    "argument {} takes {} values".format(self.dest, self.nargs)
+                )
+        state.opts[self.dest] = value
+        state.order.append(self.obj)
+
+
+class ParsingState(object):
+    def __init__(self, rargs):
+        self.opts = {}
+        self.largs = []
+        self.rargs = rargs
+        self.order = []
+
+
+class OptionParser(object):
+    """The option parser is an internal class that is ultimately used to
+    parse options and arguments.  It's modelled after optparse and brings
+    a similar but vastly simplified API.  It should generally not be used
+    directly as the high level Click classes wrap it for you.
+
+    It's not nearly as extensible as optparse or argparse as it does not
+    implement features that are implemented on a higher level (such as
+    types or defaults).
+
+    :param ctx: optionally the :class:`~click.Context` where this parser
+                should go with.
+    """
+
+    def __init__(self, ctx=None):
+        #: The :class:`~click.Context` for this parser.  This might be
+        #: `None` for some advanced use cases.
+        self.ctx = ctx
+        #: This controls how the parser deals with interspersed arguments.
+        #: If this is set to `False`, the parser will stop on the first
+        #: non-option.  Click uses this to implement nested subcommands
+        #: safely.
+        self.allow_interspersed_args = True
+        #: This tells the parser how to deal with unknown options.  By
+        #: default it will error out (which is sensible), but there is a
+        #: second mode where it will ignore it and continue processing
+        #: after shifting all the unknown options into the resulting args.
+        self.ignore_unknown_options = False
+        if ctx is not None:
+            self.allow_interspersed_args = ctx.allow_interspersed_args
+            self.ignore_unknown_options = ctx.ignore_unknown_options
+        self._short_opt = {}
+        self._long_opt = {}
+        self._opt_prefixes = {"-", "--"}
+        self._args = []
+
+    def add_option(self, opts, dest, action=None, nargs=1, const=None, obj=None):
+        """Adds a new option named `dest` to the parser.  The destination
+        is not inferred (unlike with optparse) and needs to be explicitly
+        provided.  Action can be any of ``store``, ``store_const``,
+        ``append``, ``appnd_const`` or ``count``.
+
+        The `obj` can be used to identify the option in the order list
+        that is returned from the parser.
+        """
+        if obj is None:
+            obj = dest
+        opts = [normalize_opt(opt, self.ctx) for opt in opts]
+        option = Option(opts, dest, action=action, nargs=nargs, const=const, obj=obj)
+        self._opt_prefixes.update(option.prefixes)
+        for opt in option._short_opts:
+            self._short_opt[opt] = option
+        for opt in option._long_opts:
+            self._long_opt[opt] = option
+
+    def add_argument(self, dest, nargs=1, obj=None):
+        """Adds a positional argument named `dest` to the parser.
+
+        The `obj` can be used to identify the option in the order list
+        that is returned from the parser.
+        """
+        if obj is None:
+            obj = dest
+        self._args.append(Argument(dest=dest, nargs=nargs, obj=obj))
+
+    def parse_args(self, args):
+        """Parses positional arguments and returns ``(values, args, order)``
+        for the parsed options and arguments as well as the leftover
+        arguments if there are any.  The order is a list of objects as they
+        appear on the command line.  If arguments appear multiple times they
+        will be memorized multiple times as well.
+        """
+        state = ParsingState(args)
+        try:
+            self._process_args_for_options(state)
+            self._process_args_for_args(state)
+        except UsageError:
+            if self.ctx is None or not self.ctx.resilient_parsing:
+                raise
+        return state.opts, state.largs, state.order
+
+    def _process_args_for_args(self, state):
+        pargs, args = _unpack_args(
+            state.largs + state.rargs, [x.nargs for x in self._args]
+        )
+
+        for idx, arg in enumerate(self._args):
+            arg.process(pargs[idx], state)
+
+        state.largs = args
+        state.rargs = []
+
+    def _process_args_for_options(self, state):
+        while state.rargs:
+            arg = state.rargs.pop(0)
+            arglen = len(arg)
+            # Double dashes always handled explicitly regardless of what
+            # prefixes are valid.
+            if arg == "--":
+                return
+            elif arg[:1] in self._opt_prefixes and arglen > 1:
+                self._process_opts(arg, state)
+            elif self.allow_interspersed_args:
+                state.largs.append(arg)
+            else:
+                state.rargs.insert(0, arg)
+                return
+
+        # Say this is the original argument list:
+        # [arg0, arg1, ..., arg(i-1), arg(i), arg(i+1), ..., arg(N-1)]
+        #                            ^
+        # (we are about to process arg(i)).
+        #
+        # Then rargs is [arg(i), ..., arg(N-1)] and largs is a *subset* of
+        # [arg0, ..., arg(i-1)] (any options and their arguments will have
+        # been removed from largs).
+        #
+        # The while loop will usually consume 1 or more arguments per pass.
+        # If it consumes 1 (eg. arg is an option that takes no arguments),
+        # then after _process_arg() is done the situation is:
+        #
+        #   largs = subset of [arg0, ..., arg(i)]
+        #   rargs = [arg(i+1), ..., arg(N-1)]
+        #
+        # If allow_interspersed_args is false, largs will always be
+        # *empty* -- still a subset of [arg0, ..., arg(i-1)], but
+        # not a very interesting subset!
+
+    def _match_long_opt(self, opt, explicit_value, state):
+        if opt not in self._long_opt:
+            possibilities = [word for word in self._long_opt if word.startswith(opt)]
+            raise NoSuchOption(opt, possibilities=possibilities, ctx=self.ctx)
+
+        option = self._long_opt[opt]
+        if option.takes_value:
+            # At this point it's safe to modify rargs by injecting the
+            # explicit value, because no exception is raised in this
+            # branch.  This means that the inserted value will be fully
+            # consumed.
+            if explicit_value is not None:
+                state.rargs.insert(0, explicit_value)
+
+            nargs = option.nargs
+            if len(state.rargs) < nargs:
+                _error_opt_args(nargs, opt)
+            elif nargs == 1:
+                value = state.rargs.pop(0)
+            else:
+                value = tuple(state.rargs[:nargs])
+                del state.rargs[:nargs]
+
+        elif explicit_value is not None:
+            raise BadOptionUsage(opt, "{} option does not take a value".format(opt))
+
+        else:
+            value = None
+
+        option.process(value, state)
+
+    def _match_short_opt(self, arg, state):
+        stop = False
+        i = 1
+        prefix = arg[0]
+        unknown_options = []
+
+        for ch in arg[1:]:
+            opt = normalize_opt(prefix + ch, self.ctx)
+            option = self._short_opt.get(opt)
+            i += 1
+
+            if not option:
+                if self.ignore_unknown_options:
+                    unknown_options.append(ch)
+                    continue
+                raise NoSuchOption(opt, ctx=self.ctx)
+            if option.takes_value:
+                # Any characters left in arg?  Pretend they're the
+                # next arg, and stop consuming characters of arg.
+                if i < len(arg):
+                    state.rargs.insert(0, arg[i:])
+                    stop = True
+
+                nargs = option.nargs
+                if len(state.rargs) < nargs:
+                    _error_opt_args(nargs, opt)
+                elif nargs == 1:
+                    value = state.rargs.pop(0)
+                else:
+                    value = tuple(state.rargs[:nargs])
+                    del state.rargs[:nargs]
+
+            else:
+                value = None
+
+            option.process(value, state)
+
+            if stop:
+                break
+
+        # If we got any unknown options we re-combinate the string of the
+        # remaining options and re-attach the prefix, then report that
+        # to the state as new larg.  This way there is basic combinatorics
+        # that can be achieved while still ignoring unknown arguments.
+        if self.ignore_unknown_options and unknown_options:
+            state.largs.append("{}{}".format(prefix, "".join(unknown_options)))
+
+    def _process_opts(self, arg, state):
+        explicit_value = None
+        # Long option handling happens in two parts.  The first part is
+        # supporting explicitly attached values.  In any case, we will try
+        # to long match the option first.
+        if "=" in arg:
+            long_opt, explicit_value = arg.split("=", 1)
+        else:
+            long_opt = arg
+        norm_long_opt = normalize_opt(long_opt, self.ctx)
+
+        # At this point we will match the (assumed) long option through
+        # the long option matching code.  Note that this allows options
+        # like "-foo" to be matched as long options.
+        try:
+            self._match_long_opt(norm_long_opt, explicit_value, state)
+        except NoSuchOption:
+            # At this point the long option matching failed, and we need
+            # to try with short options.  However there is a special rule
+            # which says, that if we have a two character options prefix
+            # (applies to "--foo" for instance), we do not dispatch to the
+            # short option code and will instead raise the no option
+            # error.
+            if arg[:2] not in self._opt_prefixes:
+                return self._match_short_opt(arg, state)
+            if not self.ignore_unknown_options:
+                raise
+            state.largs.append(arg)
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/termui.py b/python3-vckonline/lib/python3.8/site-packages/click/termui.py
new file mode 100644
index 0000000..02ef9e9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/termui.py
@@ -0,0 +1,681 @@
+import inspect
+import io
+import itertools
+import os
+import struct
+import sys
+
+from ._compat import DEFAULT_COLUMNS
+from ._compat import get_winterm_size
+from ._compat import isatty
+from ._compat import raw_input
+from ._compat import string_types
+from ._compat import strip_ansi
+from ._compat import text_type
+from ._compat import WIN
+from .exceptions import Abort
+from .exceptions import UsageError
+from .globals import resolve_color_default
+from .types import Choice
+from .types import convert_type
+from .types import Path
+from .utils import echo
+from .utils import LazyFile
+
+# The prompt functions to use.  The doc tools currently override these
+# functions to customize how they work.
+visible_prompt_func = raw_input
+
+_ansi_colors = {
+    "black": 30,
+    "red": 31,
+    "green": 32,
+    "yellow": 33,
+    "blue": 34,
+    "magenta": 35,
+    "cyan": 36,
+    "white": 37,
+    "reset": 39,
+    "bright_black": 90,
+    "bright_red": 91,
+    "bright_green": 92,
+    "bright_yellow": 93,
+    "bright_blue": 94,
+    "bright_magenta": 95,
+    "bright_cyan": 96,
+    "bright_white": 97,
+}
+_ansi_reset_all = "\033[0m"
+
+
+def hidden_prompt_func(prompt):
+    import getpass
+
+    return getpass.getpass(prompt)
+
+
+def _build_prompt(
+    text, suffix, show_default=False, default=None, show_choices=True, type=None
+):
+    prompt = text
+    if type is not None and show_choices and isinstance(type, Choice):
+        prompt += " ({})".format(", ".join(map(str, type.choices)))
+    if default is not None and show_default:
+        prompt = "{} [{}]".format(prompt, _format_default(default))
+    return prompt + suffix
+
+
+def _format_default(default):
+    if isinstance(default, (io.IOBase, LazyFile)) and hasattr(default, "name"):
+        return default.name
+
+    return default
+
+
+def prompt(
+    text,
+    default=None,
+    hide_input=False,
+    confirmation_prompt=False,
+    type=None,
+    value_proc=None,
+    prompt_suffix=": ",
+    show_default=True,
+    err=False,
+    show_choices=True,
+):
+    """Prompts a user for input.  This is a convenience function that can
+    be used to prompt a user for input later.
+
+    If the user aborts the input by sending a interrupt signal, this
+    function will catch it and raise a :exc:`Abort` exception.
+
+    .. versionadded:: 7.0
+       Added the show_choices parameter.
+
+    .. versionadded:: 6.0
+       Added unicode support for cmd.exe on Windows.
+
+    .. versionadded:: 4.0
+       Added the `err` parameter.
+
+    :param text: the text to show for the prompt.
+    :param default: the default value to use if no input happens.  If this
+                    is not given it will prompt until it's aborted.
+    :param hide_input: if this is set to true then the input value will
+                       be hidden.
+    :param confirmation_prompt: asks for confirmation for the value.
+    :param type: the type to use to check the value against.
+    :param value_proc: if this parameter is provided it's a function that
+                       is invoked instead of the type conversion to
+                       convert a value.
+    :param prompt_suffix: a suffix that should be added to the prompt.
+    :param show_default: shows or hides the default value in the prompt.
+    :param err: if set to true the file defaults to ``stderr`` instead of
+                ``stdout``, the same as with echo.
+    :param show_choices: Show or hide choices if the passed type is a Choice.
+                         For example if type is a Choice of either day or week,
+                         show_choices is true and text is "Group by" then the
+                         prompt will be "Group by (day, week): ".
+    """
+    result = None
+
+    def prompt_func(text):
+        f = hidden_prompt_func if hide_input else visible_prompt_func
+        try:
+            # Write the prompt separately so that we get nice
+            # coloring through colorama on Windows
+            echo(text, nl=False, err=err)
+            return f("")
+        except (KeyboardInterrupt, EOFError):
+            # getpass doesn't print a newline if the user aborts input with ^C.
+            # Allegedly this behavior is inherited from getpass(3).
+            # A doc bug has been filed at https://bugs.python.org/issue24711
+            if hide_input:
+                echo(None, err=err)
+            raise Abort()
+
+    if value_proc is None:
+        value_proc = convert_type(type, default)
+
+    prompt = _build_prompt(
+        text, prompt_suffix, show_default, default, show_choices, type
+    )
+
+    while 1:
+        while 1:
+            value = prompt_func(prompt)
+            if value:
+                break
+            elif default is not None:
+                if isinstance(value_proc, Path):
+                    # validate Path default value(exists, dir_okay etc.)
+                    value = default
+                    break
+                return default
+        try:
+            result = value_proc(value)
+        except UsageError as e:
+            echo("Error: {}".format(e.message), err=err)  # noqa: B306
+            continue
+        if not confirmation_prompt:
+            return result
+        while 1:
+            value2 = prompt_func("Repeat for confirmation: ")
+            if value2:
+                break
+        if value == value2:
+            return result
+        echo("Error: the two entered values do not match", err=err)
+
+
+def confirm(
+    text, default=False, abort=False, prompt_suffix=": ", show_default=True, err=False
+):
+    """Prompts for confirmation (yes/no question).
+
+    If the user aborts the input by sending a interrupt signal this
+    function will catch it and raise a :exc:`Abort` exception.
+
+    .. versionadded:: 4.0
+       Added the `err` parameter.
+
+    :param text: the question to ask.
+    :param default: the default for the prompt.
+    :param abort: if this is set to `True` a negative answer aborts the
+                  exception by raising :exc:`Abort`.
+    :param prompt_suffix: a suffix that should be added to the prompt.
+    :param show_default: shows or hides the default value in the prompt.
+    :param err: if set to true the file defaults to ``stderr`` instead of
+                ``stdout``, the same as with echo.
+    """
+    prompt = _build_prompt(
+        text, prompt_suffix, show_default, "Y/n" if default else "y/N"
+    )
+    while 1:
+        try:
+            # Write the prompt separately so that we get nice
+            # coloring through colorama on Windows
+            echo(prompt, nl=False, err=err)
+            value = visible_prompt_func("").lower().strip()
+        except (KeyboardInterrupt, EOFError):
+            raise Abort()
+        if value in ("y", "yes"):
+            rv = True
+        elif value in ("n", "no"):
+            rv = False
+        elif value == "":
+            rv = default
+        else:
+            echo("Error: invalid input", err=err)
+            continue
+        break
+    if abort and not rv:
+        raise Abort()
+    return rv
+
+
+def get_terminal_size():
+    """Returns the current size of the terminal as tuple in the form
+    ``(width, height)`` in columns and rows.
+    """
+    # If shutil has get_terminal_size() (Python 3.3 and later) use that
+    if sys.version_info >= (3, 3):
+        import shutil
+
+        shutil_get_terminal_size = getattr(shutil, "get_terminal_size", None)
+        if shutil_get_terminal_size:
+            sz = shutil_get_terminal_size()
+            return sz.columns, sz.lines
+
+    # We provide a sensible default for get_winterm_size() when being invoked
+    # inside a subprocess. Without this, it would not provide a useful input.
+    if get_winterm_size is not None:
+        size = get_winterm_size()
+        if size == (0, 0):
+            return (79, 24)
+        else:
+            return size
+
+    def ioctl_gwinsz(fd):
+        try:
+            import fcntl
+            import termios
+
+            cr = struct.unpack("hh", fcntl.ioctl(fd, termios.TIOCGWINSZ, "1234"))
+        except Exception:
+            return
+        return cr
+
+    cr = ioctl_gwinsz(0) or ioctl_gwinsz(1) or ioctl_gwinsz(2)
+    if not cr:
+        try:
+            fd = os.open(os.ctermid(), os.O_RDONLY)
+            try:
+                cr = ioctl_gwinsz(fd)
+            finally:
+                os.close(fd)
+        except Exception:
+            pass
+    if not cr or not cr[0] or not cr[1]:
+        cr = (os.environ.get("LINES", 25), os.environ.get("COLUMNS", DEFAULT_COLUMNS))
+    return int(cr[1]), int(cr[0])
+
+
+def echo_via_pager(text_or_generator, color=None):
+    """This function takes a text and shows it via an environment specific
+    pager on stdout.
+
+    .. versionchanged:: 3.0
+       Added the `color` flag.
+
+    :param text_or_generator: the text to page, or alternatively, a
+                              generator emitting the text to page.
+    :param color: controls if the pager supports ANSI colors or not.  The
+                  default is autodetection.
+    """
+    color = resolve_color_default(color)
+
+    if inspect.isgeneratorfunction(text_or_generator):
+        i = text_or_generator()
+    elif isinstance(text_or_generator, string_types):
+        i = [text_or_generator]
+    else:
+        i = iter(text_or_generator)
+
+    # convert every element of i to a text type if necessary
+    text_generator = (el if isinstance(el, string_types) else text_type(el) for el in i)
+
+    from ._termui_impl import pager
+
+    return pager(itertools.chain(text_generator, "\n"), color)
+
+
+def progressbar(
+    iterable=None,
+    length=None,
+    label=None,
+    show_eta=True,
+    show_percent=None,
+    show_pos=False,
+    item_show_func=None,
+    fill_char="#",
+    empty_char="-",
+    bar_template="%(label)s  [%(bar)s]  %(info)s",
+    info_sep="  ",
+    width=36,
+    file=None,
+    color=None,
+):
+    """This function creates an iterable context manager that can be used
+    to iterate over something while showing a progress bar.  It will
+    either iterate over the `iterable` or `length` items (that are counted
+    up).  While iteration happens, this function will print a rendered
+    progress bar to the given `file` (defaults to stdout) and will attempt
+    to calculate remaining time and more.  By default, this progress bar
+    will not be rendered if the file is not a terminal.
+
+    The context manager creates the progress bar.  When the context
+    manager is entered the progress bar is already created.  With every
+    iteration over the progress bar, the iterable passed to the bar is
+    advanced and the bar is updated.  When the context manager exits,
+    a newline is printed and the progress bar is finalized on screen.
+
+    Note: The progress bar is currently designed for use cases where the
+    total progress can be expected to take at least several seconds.
+    Because of this, the ProgressBar class object won't display
+    progress that is considered too fast, and progress where the time
+    between steps is less than a second.
+
+    No printing must happen or the progress bar will be unintentionally
+    destroyed.
+
+    Example usage::
+
+        with progressbar(items) as bar:
+            for item in bar:
+                do_something_with(item)
+
+    Alternatively, if no iterable is specified, one can manually update the
+    progress bar through the `update()` method instead of directly
+    iterating over the progress bar.  The update method accepts the number
+    of steps to increment the bar with::
+
+        with progressbar(length=chunks.total_bytes) as bar:
+            for chunk in chunks:
+                process_chunk(chunk)
+                bar.update(chunks.bytes)
+
+    .. versionadded:: 2.0
+
+    .. versionadded:: 4.0
+       Added the `color` parameter.  Added a `update` method to the
+       progressbar object.
+
+    :param iterable: an iterable to iterate over.  If not provided the length
+                     is required.
+    :param length: the number of items to iterate over.  By default the
+                   progressbar will attempt to ask the iterator about its
+                   length, which might or might not work.  If an iterable is
+                   also provided this parameter can be used to override the
+                   length.  If an iterable is not provided the progress bar
+                   will iterate over a range of that length.
+    :param label: the label to show next to the progress bar.
+    :param show_eta: enables or disables the estimated time display.  This is
+                     automatically disabled if the length cannot be
+                     determined.
+    :param show_percent: enables or disables the percentage display.  The
+                         default is `True` if the iterable has a length or
+                         `False` if not.
+    :param show_pos: enables or disables the absolute position display.  The
+                     default is `False`.
+    :param item_show_func: a function called with the current item which
+                           can return a string to show the current item
+                           next to the progress bar.  Note that the current
+                           item can be `None`!
+    :param fill_char: the character to use to show the filled part of the
+                      progress bar.
+    :param empty_char: the character to use to show the non-filled part of
+                       the progress bar.
+    :param bar_template: the format string to use as template for the bar.
+                         The parameters in it are ``label`` for the label,
+                         ``bar`` for the progress bar and ``info`` for the
+                         info section.
+    :param info_sep: the separator between multiple info items (eta etc.)
+    :param width: the width of the progress bar in characters, 0 means full
+                  terminal width
+    :param file: the file to write to.  If this is not a terminal then
+                 only the label is printed.
+    :param color: controls if the terminal supports ANSI colors or not.  The
+                  default is autodetection.  This is only needed if ANSI
+                  codes are included anywhere in the progress bar output
+                  which is not the case by default.
+    """
+    from ._termui_impl import ProgressBar
+
+    color = resolve_color_default(color)
+    return ProgressBar(
+        iterable=iterable,
+        length=length,
+        show_eta=show_eta,
+        show_percent=show_percent,
+        show_pos=show_pos,
+        item_show_func=item_show_func,
+        fill_char=fill_char,
+        empty_char=empty_char,
+        bar_template=bar_template,
+        info_sep=info_sep,
+        file=file,
+        label=label,
+        width=width,
+        color=color,
+    )
+
+
+def clear():
+    """Clears the terminal screen.  This will have the effect of clearing
+    the whole visible space of the terminal and moving the cursor to the
+    top left.  This does not do anything if not connected to a terminal.
+
+    .. versionadded:: 2.0
+    """
+    if not isatty(sys.stdout):
+        return
+    # If we're on Windows and we don't have colorama available, then we
+    # clear the screen by shelling out.  Otherwise we can use an escape
+    # sequence.
+    if WIN:
+        os.system("cls")
+    else:
+        sys.stdout.write("\033[2J\033[1;1H")
+
+
+def style(
+    text,
+    fg=None,
+    bg=None,
+    bold=None,
+    dim=None,
+    underline=None,
+    blink=None,
+    reverse=None,
+    reset=True,
+):
+    """Styles a text with ANSI styles and returns the new string.  By
+    default the styling is self contained which means that at the end
+    of the string a reset code is issued.  This can be prevented by
+    passing ``reset=False``.
+
+    Examples::
+
+        click.echo(click.style('Hello World!', fg='green'))
+        click.echo(click.style('ATTENTION!', blink=True))
+        click.echo(click.style('Some things', reverse=True, fg='cyan'))
+
+    Supported color names:
+
+    * ``black`` (might be a gray)
+    * ``red``
+    * ``green``
+    * ``yellow`` (might be an orange)
+    * ``blue``
+    * ``magenta``
+    * ``cyan``
+    * ``white`` (might be light gray)
+    * ``bright_black``
+    * ``bright_red``
+    * ``bright_green``
+    * ``bright_yellow``
+    * ``bright_blue``
+    * ``bright_magenta``
+    * ``bright_cyan``
+    * ``bright_white``
+    * ``reset`` (reset the color code only)
+
+    .. versionadded:: 2.0
+
+    .. versionadded:: 7.0
+       Added support for bright colors.
+
+    :param text: the string to style with ansi codes.
+    :param fg: if provided this will become the foreground color.
+    :param bg: if provided this will become the background color.
+    :param bold: if provided this will enable or disable bold mode.
+    :param dim: if provided this will enable or disable dim mode.  This is
+                badly supported.
+    :param underline: if provided this will enable or disable underline.
+    :param blink: if provided this will enable or disable blinking.
+    :param reverse: if provided this will enable or disable inverse
+                    rendering (foreground becomes background and the
+                    other way round).
+    :param reset: by default a reset-all code is added at the end of the
+                  string which means that styles do not carry over.  This
+                  can be disabled to compose styles.
+    """
+    bits = []
+    if fg:
+        try:
+            bits.append("\033[{}m".format(_ansi_colors[fg]))
+        except KeyError:
+            raise TypeError("Unknown color '{}'".format(fg))
+    if bg:
+        try:
+            bits.append("\033[{}m".format(_ansi_colors[bg] + 10))
+        except KeyError:
+            raise TypeError("Unknown color '{}'".format(bg))
+    if bold is not None:
+        bits.append("\033[{}m".format(1 if bold else 22))
+    if dim is not None:
+        bits.append("\033[{}m".format(2 if dim else 22))
+    if underline is not None:
+        bits.append("\033[{}m".format(4 if underline else 24))
+    if blink is not None:
+        bits.append("\033[{}m".format(5 if blink else 25))
+    if reverse is not None:
+        bits.append("\033[{}m".format(7 if reverse else 27))
+    bits.append(text)
+    if reset:
+        bits.append(_ansi_reset_all)
+    return "".join(bits)
+
+
+def unstyle(text):
+    """Removes ANSI styling information from a string.  Usually it's not
+    necessary to use this function as Click's echo function will
+    automatically remove styling if necessary.
+
+    .. versionadded:: 2.0
+
+    :param text: the text to remove style information from.
+    """
+    return strip_ansi(text)
+
+
+def secho(message=None, file=None, nl=True, err=False, color=None, **styles):
+    """This function combines :func:`echo` and :func:`style` into one
+    call.  As such the following two calls are the same::
+
+        click.secho('Hello World!', fg='green')
+        click.echo(click.style('Hello World!', fg='green'))
+
+    All keyword arguments are forwarded to the underlying functions
+    depending on which one they go with.
+
+    .. versionadded:: 2.0
+    """
+    if message is not None:
+        message = style(message, **styles)
+    return echo(message, file=file, nl=nl, err=err, color=color)
+
+
+def edit(
+    text=None, editor=None, env=None, require_save=True, extension=".txt", filename=None
+):
+    r"""Edits the given text in the defined editor.  If an editor is given
+    (should be the full path to the executable but the regular operating
+    system search path is used for finding the executable) it overrides
+    the detected editor.  Optionally, some environment variables can be
+    used.  If the editor is closed without changes, `None` is returned.  In
+    case a file is edited directly the return value is always `None` and
+    `require_save` and `extension` are ignored.
+
+    If the editor cannot be opened a :exc:`UsageError` is raised.
+
+    Note for Windows: to simplify cross-platform usage, the newlines are
+    automatically converted from POSIX to Windows and vice versa.  As such,
+    the message here will have ``\n`` as newline markers.
+
+    :param text: the text to edit.
+    :param editor: optionally the editor to use.  Defaults to automatic
+                   detection.
+    :param env: environment variables to forward to the editor.
+    :param require_save: if this is true, then not saving in the editor
+                         will make the return value become `None`.
+    :param extension: the extension to tell the editor about.  This defaults
+                      to `.txt` but changing this might change syntax
+                      highlighting.
+    :param filename: if provided it will edit this file instead of the
+                     provided text contents.  It will not use a temporary
+                     file as an indirection in that case.
+    """
+    from ._termui_impl import Editor
+
+    editor = Editor(
+        editor=editor, env=env, require_save=require_save, extension=extension
+    )
+    if filename is None:
+        return editor.edit(text)
+    editor.edit_file(filename)
+
+
+def launch(url, wait=False, locate=False):
+    """This function launches the given URL (or filename) in the default
+    viewer application for this file type.  If this is an executable, it
+    might launch the executable in a new session.  The return value is
+    the exit code of the launched application.  Usually, ``0`` indicates
+    success.
+
+    Examples::
+
+        click.launch('https://click.palletsprojects.com/')
+        click.launch('/my/downloaded/file', locate=True)
+
+    .. versionadded:: 2.0
+
+    :param url: URL or filename of the thing to launch.
+    :param wait: waits for the program to stop.
+    :param locate: if this is set to `True` then instead of launching the
+                   application associated with the URL it will attempt to
+                   launch a file manager with the file located.  This
+                   might have weird effects if the URL does not point to
+                   the filesystem.
+    """
+    from ._termui_impl import open_url
+
+    return open_url(url, wait=wait, locate=locate)
+
+
+# If this is provided, getchar() calls into this instead.  This is used
+# for unittesting purposes.
+_getchar = None
+
+
+def getchar(echo=False):
+    """Fetches a single character from the terminal and returns it.  This
+    will always return a unicode character and under certain rare
+    circumstances this might return more than one character.  The
+    situations which more than one character is returned is when for
+    whatever reason multiple characters end up in the terminal buffer or
+    standard input was not actually a terminal.
+
+    Note that this will always read from the terminal, even if something
+    is piped into the standard input.
+
+    Note for Windows: in rare cases when typing non-ASCII characters, this
+    function might wait for a second character and then return both at once.
+    This is because certain Unicode characters look like special-key markers.
+
+    .. versionadded:: 2.0
+
+    :param echo: if set to `True`, the character read will also show up on
+                 the terminal.  The default is to not show it.
+    """
+    f = _getchar
+    if f is None:
+        from ._termui_impl import getchar as f
+    return f(echo)
+
+
+def raw_terminal():
+    from ._termui_impl import raw_terminal as f
+
+    return f()
+
+
+def pause(info="Press any key to continue ...", err=False):
+    """This command stops execution and waits for the user to press any
+    key to continue.  This is similar to the Windows batch "pause"
+    command.  If the program is not run through a terminal, this command
+    will instead do nothing.
+
+    .. versionadded:: 2.0
+
+    .. versionadded:: 4.0
+       Added the `err` parameter.
+
+    :param info: the info string to print before pausing.
+    :param err: if set to message goes to ``stderr`` instead of
+                ``stdout``, the same as with echo.
+    """
+    if not isatty(sys.stdin) or not isatty(sys.stdout):
+        return
+    try:
+        if info:
+            echo(info, nl=False, err=err)
+        try:
+            getchar()
+        except (KeyboardInterrupt, EOFError):
+            pass
+    finally:
+        if info:
+            echo(err=err)
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/testing.py b/python3-vckonline/lib/python3.8/site-packages/click/testing.py
new file mode 100644
index 0000000..a3dba3b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/testing.py
@@ -0,0 +1,382 @@
+import contextlib
+import os
+import shlex
+import shutil
+import sys
+import tempfile
+
+from . import formatting
+from . import termui
+from . import utils
+from ._compat import iteritems
+from ._compat import PY2
+from ._compat import string_types
+
+
+if PY2:
+    from cStringIO import StringIO
+else:
+    import io
+    from ._compat import _find_binary_reader
+
+
+class EchoingStdin(object):
+    def __init__(self, input, output):
+        self._input = input
+        self._output = output
+
+    def __getattr__(self, x):
+        return getattr(self._input, x)
+
+    def _echo(self, rv):
+        self._output.write(rv)
+        return rv
+
+    def read(self, n=-1):
+        return self._echo(self._input.read(n))
+
+    def readline(self, n=-1):
+        return self._echo(self._input.readline(n))
+
+    def readlines(self):
+        return [self._echo(x) for x in self._input.readlines()]
+
+    def __iter__(self):
+        return iter(self._echo(x) for x in self._input)
+
+    def __repr__(self):
+        return repr(self._input)
+
+
+def make_input_stream(input, charset):
+    # Is already an input stream.
+    if hasattr(input, "read"):
+        if PY2:
+            return input
+        rv = _find_binary_reader(input)
+        if rv is not None:
+            return rv
+        raise TypeError("Could not find binary reader for input stream.")
+
+    if input is None:
+        input = b""
+    elif not isinstance(input, bytes):
+        input = input.encode(charset)
+    if PY2:
+        return StringIO(input)
+    return io.BytesIO(input)
+
+
+class Result(object):
+    """Holds the captured result of an invoked CLI script."""
+
+    def __init__(
+        self, runner, stdout_bytes, stderr_bytes, exit_code, exception, exc_info=None
+    ):
+        #: The runner that created the result
+        self.runner = runner
+        #: The standard output as bytes.
+        self.stdout_bytes = stdout_bytes
+        #: The standard error as bytes, or None if not available
+        self.stderr_bytes = stderr_bytes
+        #: The exit code as integer.
+        self.exit_code = exit_code
+        #: The exception that happened if one did.
+        self.exception = exception
+        #: The traceback
+        self.exc_info = exc_info
+
+    @property
+    def output(self):
+        """The (standard) output as unicode string."""
+        return self.stdout
+
+    @property
+    def stdout(self):
+        """The standard output as unicode string."""
+        return self.stdout_bytes.decode(self.runner.charset, "replace").replace(
+            "\r\n", "\n"
+        )
+
+    @property
+    def stderr(self):
+        """The standard error as unicode string."""
+        if self.stderr_bytes is None:
+            raise ValueError("stderr not separately captured")
+        return self.stderr_bytes.decode(self.runner.charset, "replace").replace(
+            "\r\n", "\n"
+        )
+
+    def __repr__(self):
+        return "<{} {}>".format(
+            type(self).__name__, repr(self.exception) if self.exception else "okay"
+        )
+
+
+class CliRunner(object):
+    """The CLI runner provides functionality to invoke a Click command line
+    script for unittesting purposes in a isolated environment.  This only
+    works in single-threaded systems without any concurrency as it changes the
+    global interpreter state.
+
+    :param charset: the character set for the input and output data.  This is
+                    UTF-8 by default and should not be changed currently as
+                    the reporting to Click only works in Python 2 properly.
+    :param env: a dictionary with environment variables for overriding.
+    :param echo_stdin: if this is set to `True`, then reading from stdin writes
+                       to stdout.  This is useful for showing examples in
+                       some circumstances.  Note that regular prompts
+                       will automatically echo the input.
+    :param mix_stderr: if this is set to `False`, then stdout and stderr are
+                       preserved as independent streams.  This is useful for
+                       Unix-philosophy apps that have predictable stdout and
+                       noisy stderr, such that each may be measured
+                       independently
+    """
+
+    def __init__(self, charset=None, env=None, echo_stdin=False, mix_stderr=True):
+        if charset is None:
+            charset = "utf-8"
+        self.charset = charset
+        self.env = env or {}
+        self.echo_stdin = echo_stdin
+        self.mix_stderr = mix_stderr
+
+    def get_default_prog_name(self, cli):
+        """Given a command object it will return the default program name
+        for it.  The default is the `name` attribute or ``"root"`` if not
+        set.
+        """
+        return cli.name or "root"
+
+    def make_env(self, overrides=None):
+        """Returns the environment overrides for invoking a script."""
+        rv = dict(self.env)
+        if overrides:
+            rv.update(overrides)
+        return rv
+
+    @contextlib.contextmanager
+    def isolation(self, input=None, env=None, color=False):
+        """A context manager that sets up the isolation for invoking of a
+        command line tool.  This sets up stdin with the given input data
+        and `os.environ` with the overrides from the given dictionary.
+        This also rebinds some internals in Click to be mocked (like the
+        prompt functionality).
+
+        This is automatically done in the :meth:`invoke` method.
+
+        .. versionadded:: 4.0
+           The ``color`` parameter was added.
+
+        :param input: the input stream to put into sys.stdin.
+        :param env: the environment overrides as dictionary.
+        :param color: whether the output should contain color codes. The
+                      application can still override this explicitly.
+        """
+        input = make_input_stream(input, self.charset)
+
+        old_stdin = sys.stdin
+        old_stdout = sys.stdout
+        old_stderr = sys.stderr
+        old_forced_width = formatting.FORCED_WIDTH
+        formatting.FORCED_WIDTH = 80
+
+        env = self.make_env(env)
+
+        if PY2:
+            bytes_output = StringIO()
+            if self.echo_stdin:
+                input = EchoingStdin(input, bytes_output)
+            sys.stdout = bytes_output
+            if not self.mix_stderr:
+                bytes_error = StringIO()
+                sys.stderr = bytes_error
+        else:
+            bytes_output = io.BytesIO()
+            if self.echo_stdin:
+                input = EchoingStdin(input, bytes_output)
+            input = io.TextIOWrapper(input, encoding=self.charset)
+            sys.stdout = io.TextIOWrapper(bytes_output, encoding=self.charset)
+            if not self.mix_stderr:
+                bytes_error = io.BytesIO()
+                sys.stderr = io.TextIOWrapper(bytes_error, encoding=self.charset)
+
+        if self.mix_stderr:
+            sys.stderr = sys.stdout
+
+        sys.stdin = input
+
+        def visible_input(prompt=None):
+            sys.stdout.write(prompt or "")
+            val = input.readline().rstrip("\r\n")
+            sys.stdout.write("{}\n".format(val))
+            sys.stdout.flush()
+            return val
+
+        def hidden_input(prompt=None):
+            sys.stdout.write("{}\n".format(prompt or ""))
+            sys.stdout.flush()
+            return input.readline().rstrip("\r\n")
+
+        def _getchar(echo):
+            char = sys.stdin.read(1)
+            if echo:
+                sys.stdout.write(char)
+                sys.stdout.flush()
+            return char
+
+        default_color = color
+
+        def should_strip_ansi(stream=None, color=None):
+            if color is None:
+                return not default_color
+            return not color
+
+        old_visible_prompt_func = termui.visible_prompt_func
+        old_hidden_prompt_func = termui.hidden_prompt_func
+        old__getchar_func = termui._getchar
+        old_should_strip_ansi = utils.should_strip_ansi
+        termui.visible_prompt_func = visible_input
+        termui.hidden_prompt_func = hidden_input
+        termui._getchar = _getchar
+        utils.should_strip_ansi = should_strip_ansi
+
+        old_env = {}
+        try:
+            for key, value in iteritems(env):
+                old_env[key] = os.environ.get(key)
+                if value is None:
+                    try:
+                        del os.environ[key]
+                    except Exception:
+                        pass
+                else:
+                    os.environ[key] = value
+            yield (bytes_output, not self.mix_stderr and bytes_error)
+        finally:
+            for key, value in iteritems(old_env):
+                if value is None:
+                    try:
+                        del os.environ[key]
+                    except Exception:
+                        pass
+                else:
+                    os.environ[key] = value
+            sys.stdout = old_stdout
+            sys.stderr = old_stderr
+            sys.stdin = old_stdin
+            termui.visible_prompt_func = old_visible_prompt_func
+            termui.hidden_prompt_func = old_hidden_prompt_func
+            termui._getchar = old__getchar_func
+            utils.should_strip_ansi = old_should_strip_ansi
+            formatting.FORCED_WIDTH = old_forced_width
+
+    def invoke(
+        self,
+        cli,
+        args=None,
+        input=None,
+        env=None,
+        catch_exceptions=True,
+        color=False,
+        **extra
+    ):
+        """Invokes a command in an isolated environment.  The arguments are
+        forwarded directly to the command line script, the `extra` keyword
+        arguments are passed to the :meth:`~clickpkg.Command.main` function of
+        the command.
+
+        This returns a :class:`Result` object.
+
+        .. versionadded:: 3.0
+           The ``catch_exceptions`` parameter was added.
+
+        .. versionchanged:: 3.0
+           The result object now has an `exc_info` attribute with the
+           traceback if available.
+
+        .. versionadded:: 4.0
+           The ``color`` parameter was added.
+
+        :param cli: the command to invoke
+        :param args: the arguments to invoke. It may be given as an iterable
+                     or a string. When given as string it will be interpreted
+                     as a Unix shell command. More details at
+                     :func:`shlex.split`.
+        :param input: the input data for `sys.stdin`.
+        :param env: the environment overrides.
+        :param catch_exceptions: Whether to catch any other exceptions than
+                                 ``SystemExit``.
+        :param extra: the keyword arguments to pass to :meth:`main`.
+        :param color: whether the output should contain color codes. The
+                      application can still override this explicitly.
+        """
+        exc_info = None
+        with self.isolation(input=input, env=env, color=color) as outstreams:
+            exception = None
+            exit_code = 0
+
+            if isinstance(args, string_types):
+                args = shlex.split(args)
+
+            try:
+                prog_name = extra.pop("prog_name")
+            except KeyError:
+                prog_name = self.get_default_prog_name(cli)
+
+            try:
+                cli.main(args=args or (), prog_name=prog_name, **extra)
+            except SystemExit as e:
+                exc_info = sys.exc_info()
+                exit_code = e.code
+                if exit_code is None:
+                    exit_code = 0
+
+                if exit_code != 0:
+                    exception = e
+
+                if not isinstance(exit_code, int):
+                    sys.stdout.write(str(exit_code))
+                    sys.stdout.write("\n")
+                    exit_code = 1
+
+            except Exception as e:
+                if not catch_exceptions:
+                    raise
+                exception = e
+                exit_code = 1
+                exc_info = sys.exc_info()
+            finally:
+                sys.stdout.flush()
+                stdout = outstreams[0].getvalue()
+                if self.mix_stderr:
+                    stderr = None
+                else:
+                    stderr = outstreams[1].getvalue()
+
+        return Result(
+            runner=self,
+            stdout_bytes=stdout,
+            stderr_bytes=stderr,
+            exit_code=exit_code,
+            exception=exception,
+            exc_info=exc_info,
+        )
+
+    @contextlib.contextmanager
+    def isolated_filesystem(self):
+        """A context manager that creates a temporary folder and changes
+        the current working directory to it for isolated filesystem tests.
+        """
+        cwd = os.getcwd()
+        t = tempfile.mkdtemp()
+        os.chdir(t)
+        try:
+            yield t
+        finally:
+            os.chdir(cwd)
+            try:
+                shutil.rmtree(t)
+            except (OSError, IOError):  # noqa: B014
+                pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/types.py b/python3-vckonline/lib/python3.8/site-packages/click/types.py
new file mode 100644
index 0000000..505c39f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/types.py
@@ -0,0 +1,762 @@
+import os
+import stat
+from datetime import datetime
+
+from ._compat import _get_argv_encoding
+from ._compat import filename_to_ui
+from ._compat import get_filesystem_encoding
+from ._compat import get_streerror
+from ._compat import open_stream
+from ._compat import PY2
+from ._compat import text_type
+from .exceptions import BadParameter
+from .utils import LazyFile
+from .utils import safecall
+
+
+class ParamType(object):
+    """Helper for converting values through types.  The following is
+    necessary for a valid type:
+
+    *   it needs a name
+    *   it needs to pass through None unchanged
+    *   it needs to convert from a string
+    *   it needs to convert its result type through unchanged
+        (eg: needs to be idempotent)
+    *   it needs to be able to deal with param and context being `None`.
+        This can be the case when the object is used with prompt
+        inputs.
+    """
+
+    is_composite = False
+
+    #: the descriptive name of this type
+    name = None
+
+    #: if a list of this type is expected and the value is pulled from a
+    #: string environment variable, this is what splits it up.  `None`
+    #: means any whitespace.  For all parameters the general rule is that
+    #: whitespace splits them up.  The exception are paths and files which
+    #: are split by ``os.path.pathsep`` by default (":" on Unix and ";" on
+    #: Windows).
+    envvar_list_splitter = None
+
+    def __call__(self, value, param=None, ctx=None):
+        if value is not None:
+            return self.convert(value, param, ctx)
+
+    def get_metavar(self, param):
+        """Returns the metavar default for this param if it provides one."""
+
+    def get_missing_message(self, param):
+        """Optionally might return extra information about a missing
+        parameter.
+
+        .. versionadded:: 2.0
+        """
+
+    def convert(self, value, param, ctx):
+        """Converts the value.  This is not invoked for values that are
+        `None` (the missing value).
+        """
+        return value
+
+    def split_envvar_value(self, rv):
+        """Given a value from an environment variable this splits it up
+        into small chunks depending on the defined envvar list splitter.
+
+        If the splitter is set to `None`, which means that whitespace splits,
+        then leading and trailing whitespace is ignored.  Otherwise, leading
+        and trailing splitters usually lead to empty items being included.
+        """
+        return (rv or "").split(self.envvar_list_splitter)
+
+    def fail(self, message, param=None, ctx=None):
+        """Helper method to fail with an invalid value message."""
+        raise BadParameter(message, ctx=ctx, param=param)
+
+
+class CompositeParamType(ParamType):
+    is_composite = True
+
+    @property
+    def arity(self):
+        raise NotImplementedError()
+
+
+class FuncParamType(ParamType):
+    def __init__(self, func):
+        self.name = func.__name__
+        self.func = func
+
+    def convert(self, value, param, ctx):
+        try:
+            return self.func(value)
+        except ValueError:
+            try:
+                value = text_type(value)
+            except UnicodeError:
+                value = str(value).decode("utf-8", "replace")
+            self.fail(value, param, ctx)
+
+
+class UnprocessedParamType(ParamType):
+    name = "text"
+
+    def convert(self, value, param, ctx):
+        return value
+
+    def __repr__(self):
+        return "UNPROCESSED"
+
+
+class StringParamType(ParamType):
+    name = "text"
+
+    def convert(self, value, param, ctx):
+        if isinstance(value, bytes):
+            enc = _get_argv_encoding()
+            try:
+                value = value.decode(enc)
+            except UnicodeError:
+                fs_enc = get_filesystem_encoding()
+                if fs_enc != enc:
+                    try:
+                        value = value.decode(fs_enc)
+                    except UnicodeError:
+                        value = value.decode("utf-8", "replace")
+                else:
+                    value = value.decode("utf-8", "replace")
+            return value
+        return value
+
+    def __repr__(self):
+        return "STRING"
+
+
+class Choice(ParamType):
+    """The choice type allows a value to be checked against a fixed set
+    of supported values. All of these values have to be strings.
+
+    You should only pass a list or tuple of choices. Other iterables
+    (like generators) may lead to surprising results.
+
+    The resulting value will always be one of the originally passed choices
+    regardless of ``case_sensitive`` or any ``ctx.token_normalize_func``
+    being specified.
+
+    See :ref:`choice-opts` for an example.
+
+    :param case_sensitive: Set to false to make choices case
+        insensitive. Defaults to true.
+    """
+
+    name = "choice"
+
+    def __init__(self, choices, case_sensitive=True):
+        self.choices = choices
+        self.case_sensitive = case_sensitive
+
+    def get_metavar(self, param):
+        return "[{}]".format("|".join(self.choices))
+
+    def get_missing_message(self, param):
+        return "Choose from:\n\t{}.".format(",\n\t".join(self.choices))
+
+    def convert(self, value, param, ctx):
+        # Match through normalization and case sensitivity
+        # first do token_normalize_func, then lowercase
+        # preserve original `value` to produce an accurate message in
+        # `self.fail`
+        normed_value = value
+        normed_choices = {choice: choice for choice in self.choices}
+
+        if ctx is not None and ctx.token_normalize_func is not None:
+            normed_value = ctx.token_normalize_func(value)
+            normed_choices = {
+                ctx.token_normalize_func(normed_choice): original
+                for normed_choice, original in normed_choices.items()
+            }
+
+        if not self.case_sensitive:
+            if PY2:
+                lower = str.lower
+            else:
+                lower = str.casefold
+
+            normed_value = lower(normed_value)
+            normed_choices = {
+                lower(normed_choice): original
+                for normed_choice, original in normed_choices.items()
+            }
+
+        if normed_value in normed_choices:
+            return normed_choices[normed_value]
+
+        self.fail(
+            "invalid choice: {}. (choose from {})".format(
+                value, ", ".join(self.choices)
+            ),
+            param,
+            ctx,
+        )
+
+    def __repr__(self):
+        return "Choice('{}')".format(list(self.choices))
+
+
+class DateTime(ParamType):
+    """The DateTime type converts date strings into `datetime` objects.
+
+    The format strings which are checked are configurable, but default to some
+    common (non-timezone aware) ISO 8601 formats.
+
+    When specifying *DateTime* formats, you should only pass a list or a tuple.
+    Other iterables, like generators, may lead to surprising results.
+
+    The format strings are processed using ``datetime.strptime``, and this
+    consequently defines the format strings which are allowed.
+
+    Parsing is tried using each format, in order, and the first format which
+    parses successfully is used.
+
+    :param formats: A list or tuple of date format strings, in the order in
+                    which they should be tried. Defaults to
+                    ``'%Y-%m-%d'``, ``'%Y-%m-%dT%H:%M:%S'``,
+                    ``'%Y-%m-%d %H:%M:%S'``.
+    """
+
+    name = "datetime"
+
+    def __init__(self, formats=None):
+        self.formats = formats or ["%Y-%m-%d", "%Y-%m-%dT%H:%M:%S", "%Y-%m-%d %H:%M:%S"]
+
+    def get_metavar(self, param):
+        return "[{}]".format("|".join(self.formats))
+
+    def _try_to_convert_date(self, value, format):
+        try:
+            return datetime.strptime(value, format)
+        except ValueError:
+            return None
+
+    def convert(self, value, param, ctx):
+        # Exact match
+        for format in self.formats:
+            dtime = self._try_to_convert_date(value, format)
+            if dtime:
+                return dtime
+
+        self.fail(
+            "invalid datetime format: {}. (choose from {})".format(
+                value, ", ".join(self.formats)
+            )
+        )
+
+    def __repr__(self):
+        return "DateTime"
+
+
+class IntParamType(ParamType):
+    name = "integer"
+
+    def convert(self, value, param, ctx):
+        try:
+            return int(value)
+        except ValueError:
+            self.fail("{} is not a valid integer".format(value), param, ctx)
+
+    def __repr__(self):
+        return "INT"
+
+
+class IntRange(IntParamType):
+    """A parameter that works similar to :data:`click.INT` but restricts
+    the value to fit into a range.  The default behavior is to fail if the
+    value falls outside the range, but it can also be silently clamped
+    between the two edges.
+
+    See :ref:`ranges` for an example.
+    """
+
+    name = "integer range"
+
+    def __init__(self, min=None, max=None, clamp=False):
+        self.min = min
+        self.max = max
+        self.clamp = clamp
+
+    def convert(self, value, param, ctx):
+        rv = IntParamType.convert(self, value, param, ctx)
+        if self.clamp:
+            if self.min is not None and rv < self.min:
+                return self.min
+            if self.max is not None and rv > self.max:
+                return self.max
+        if (
+            self.min is not None
+            and rv < self.min
+            or self.max is not None
+            and rv > self.max
+        ):
+            if self.min is None:
+                self.fail(
+                    "{} is bigger than the maximum valid value {}.".format(
+                        rv, self.max
+                    ),
+                    param,
+                    ctx,
+                )
+            elif self.max is None:
+                self.fail(
+                    "{} is smaller than the minimum valid value {}.".format(
+                        rv, self.min
+                    ),
+                    param,
+                    ctx,
+                )
+            else:
+                self.fail(
+                    "{} is not in the valid range of {} to {}.".format(
+                        rv, self.min, self.max
+                    ),
+                    param,
+                    ctx,
+                )
+        return rv
+
+    def __repr__(self):
+        return "IntRange({}, {})".format(self.min, self.max)
+
+
+class FloatParamType(ParamType):
+    name = "float"
+
+    def convert(self, value, param, ctx):
+        try:
+            return float(value)
+        except ValueError:
+            self.fail(
+                "{} is not a valid floating point value".format(value), param, ctx
+            )
+
+    def __repr__(self):
+        return "FLOAT"
+
+
+class FloatRange(FloatParamType):
+    """A parameter that works similar to :data:`click.FLOAT` but restricts
+    the value to fit into a range.  The default behavior is to fail if the
+    value falls outside the range, but it can also be silently clamped
+    between the two edges.
+
+    See :ref:`ranges` for an example.
+    """
+
+    name = "float range"
+
+    def __init__(self, min=None, max=None, clamp=False):
+        self.min = min
+        self.max = max
+        self.clamp = clamp
+
+    def convert(self, value, param, ctx):
+        rv = FloatParamType.convert(self, value, param, ctx)
+        if self.clamp:
+            if self.min is not None and rv < self.min:
+                return self.min
+            if self.max is not None and rv > self.max:
+                return self.max
+        if (
+            self.min is not None
+            and rv < self.min
+            or self.max is not None
+            and rv > self.max
+        ):
+            if self.min is None:
+                self.fail(
+                    "{} is bigger than the maximum valid value {}.".format(
+                        rv, self.max
+                    ),
+                    param,
+                    ctx,
+                )
+            elif self.max is None:
+                self.fail(
+                    "{} is smaller than the minimum valid value {}.".format(
+                        rv, self.min
+                    ),
+                    param,
+                    ctx,
+                )
+            else:
+                self.fail(
+                    "{} is not in the valid range of {} to {}.".format(
+                        rv, self.min, self.max
+                    ),
+                    param,
+                    ctx,
+                )
+        return rv
+
+    def __repr__(self):
+        return "FloatRange({}, {})".format(self.min, self.max)
+
+
+class BoolParamType(ParamType):
+    name = "boolean"
+
+    def convert(self, value, param, ctx):
+        if isinstance(value, bool):
+            return bool(value)
+        value = value.lower()
+        if value in ("true", "t", "1", "yes", "y"):
+            return True
+        elif value in ("false", "f", "0", "no", "n"):
+            return False
+        self.fail("{} is not a valid boolean".format(value), param, ctx)
+
+    def __repr__(self):
+        return "BOOL"
+
+
+class UUIDParameterType(ParamType):
+    name = "uuid"
+
+    def convert(self, value, param, ctx):
+        import uuid
+
+        try:
+            if PY2 and isinstance(value, text_type):
+                value = value.encode("ascii")
+            return uuid.UUID(value)
+        except ValueError:
+            self.fail("{} is not a valid UUID value".format(value), param, ctx)
+
+    def __repr__(self):
+        return "UUID"
+
+
+class File(ParamType):
+    """Declares a parameter to be a file for reading or writing.  The file
+    is automatically closed once the context tears down (after the command
+    finished working).
+
+    Files can be opened for reading or writing.  The special value ``-``
+    indicates stdin or stdout depending on the mode.
+
+    By default, the file is opened for reading text data, but it can also be
+    opened in binary mode or for writing.  The encoding parameter can be used
+    to force a specific encoding.
+
+    The `lazy` flag controls if the file should be opened immediately or upon
+    first IO. The default is to be non-lazy for standard input and output
+    streams as well as files opened for reading, `lazy` otherwise. When opening a
+    file lazily for reading, it is still opened temporarily for validation, but
+    will not be held open until first IO. lazy is mainly useful when opening
+    for writing to avoid creating the file until it is needed.
+
+    Starting with Click 2.0, files can also be opened atomically in which
+    case all writes go into a separate file in the same folder and upon
+    completion the file will be moved over to the original location.  This
+    is useful if a file regularly read by other users is modified.
+
+    See :ref:`file-args` for more information.
+    """
+
+    name = "filename"
+    envvar_list_splitter = os.path.pathsep
+
+    def __init__(
+        self, mode="r", encoding=None, errors="strict", lazy=None, atomic=False
+    ):
+        self.mode = mode
+        self.encoding = encoding
+        self.errors = errors
+        self.lazy = lazy
+        self.atomic = atomic
+
+    def resolve_lazy_flag(self, value):
+        if self.lazy is not None:
+            return self.lazy
+        if value == "-":
+            return False
+        elif "w" in self.mode:
+            return True
+        return False
+
+    def convert(self, value, param, ctx):
+        try:
+            if hasattr(value, "read") or hasattr(value, "write"):
+                return value
+
+            lazy = self.resolve_lazy_flag(value)
+
+            if lazy:
+                f = LazyFile(
+                    value, self.mode, self.encoding, self.errors, atomic=self.atomic
+                )
+                if ctx is not None:
+                    ctx.call_on_close(f.close_intelligently)
+                return f
+
+            f, should_close = open_stream(
+                value, self.mode, self.encoding, self.errors, atomic=self.atomic
+            )
+            # If a context is provided, we automatically close the file
+            # at the end of the context execution (or flush out).  If a
+            # context does not exist, it's the caller's responsibility to
+            # properly close the file.  This for instance happens when the
+            # type is used with prompts.
+            if ctx is not None:
+                if should_close:
+                    ctx.call_on_close(safecall(f.close))
+                else:
+                    ctx.call_on_close(safecall(f.flush))
+            return f
+        except (IOError, OSError) as e:  # noqa: B014
+            self.fail(
+                "Could not open file: {}: {}".format(
+                    filename_to_ui(value), get_streerror(e)
+                ),
+                param,
+                ctx,
+            )
+
+
+class Path(ParamType):
+    """The path type is similar to the :class:`File` type but it performs
+    different checks.  First of all, instead of returning an open file
+    handle it returns just the filename.  Secondly, it can perform various
+    basic checks about what the file or directory should be.
+
+    .. versionchanged:: 6.0
+       `allow_dash` was added.
+
+    :param exists: if set to true, the file or directory needs to exist for
+                   this value to be valid.  If this is not required and a
+                   file does indeed not exist, then all further checks are
+                   silently skipped.
+    :param file_okay: controls if a file is a possible value.
+    :param dir_okay: controls if a directory is a possible value.
+    :param writable: if true, a writable check is performed.
+    :param readable: if true, a readable check is performed.
+    :param resolve_path: if this is true, then the path is fully resolved
+                         before the value is passed onwards.  This means
+                         that it's absolute and symlinks are resolved.  It
+                         will not expand a tilde-prefix, as this is
+                         supposed to be done by the shell only.
+    :param allow_dash: If this is set to `True`, a single dash to indicate
+                       standard streams is permitted.
+    :param path_type: optionally a string type that should be used to
+                      represent the path.  The default is `None` which
+                      means the return value will be either bytes or
+                      unicode depending on what makes most sense given the
+                      input data Click deals with.
+    """
+
+    envvar_list_splitter = os.path.pathsep
+
+    def __init__(
+        self,
+        exists=False,
+        file_okay=True,
+        dir_okay=True,
+        writable=False,
+        readable=True,
+        resolve_path=False,
+        allow_dash=False,
+        path_type=None,
+    ):
+        self.exists = exists
+        self.file_okay = file_okay
+        self.dir_okay = dir_okay
+        self.writable = writable
+        self.readable = readable
+        self.resolve_path = resolve_path
+        self.allow_dash = allow_dash
+        self.type = path_type
+
+        if self.file_okay and not self.dir_okay:
+            self.name = "file"
+            self.path_type = "File"
+        elif self.dir_okay and not self.file_okay:
+            self.name = "directory"
+            self.path_type = "Directory"
+        else:
+            self.name = "path"
+            self.path_type = "Path"
+
+    def coerce_path_result(self, rv):
+        if self.type is not None and not isinstance(rv, self.type):
+            if self.type is text_type:
+                rv = rv.decode(get_filesystem_encoding())
+            else:
+                rv = rv.encode(get_filesystem_encoding())
+        return rv
+
+    def convert(self, value, param, ctx):
+        rv = value
+
+        is_dash = self.file_okay and self.allow_dash and rv in (b"-", "-")
+
+        if not is_dash:
+            if self.resolve_path:
+                rv = os.path.realpath(rv)
+
+            try:
+                st = os.stat(rv)
+            except OSError:
+                if not self.exists:
+                    return self.coerce_path_result(rv)
+                self.fail(
+                    "{} '{}' does not exist.".format(
+                        self.path_type, filename_to_ui(value)
+                    ),
+                    param,
+                    ctx,
+                )
+
+            if not self.file_okay and stat.S_ISREG(st.st_mode):
+                self.fail(
+                    "{} '{}' is a file.".format(self.path_type, filename_to_ui(value)),
+                    param,
+                    ctx,
+                )
+            if not self.dir_okay and stat.S_ISDIR(st.st_mode):
+                self.fail(
+                    "{} '{}' is a directory.".format(
+                        self.path_type, filename_to_ui(value)
+                    ),
+                    param,
+                    ctx,
+                )
+            if self.writable and not os.access(value, os.W_OK):
+                self.fail(
+                    "{} '{}' is not writable.".format(
+                        self.path_type, filename_to_ui(value)
+                    ),
+                    param,
+                    ctx,
+                )
+            if self.readable and not os.access(value, os.R_OK):
+                self.fail(
+                    "{} '{}' is not readable.".format(
+                        self.path_type, filename_to_ui(value)
+                    ),
+                    param,
+                    ctx,
+                )
+
+        return self.coerce_path_result(rv)
+
+
+class Tuple(CompositeParamType):
+    """The default behavior of Click is to apply a type on a value directly.
+    This works well in most cases, except for when `nargs` is set to a fixed
+    count and different types should be used for different items.  In this
+    case the :class:`Tuple` type can be used.  This type can only be used
+    if `nargs` is set to a fixed number.
+
+    For more information see :ref:`tuple-type`.
+
+    This can be selected by using a Python tuple literal as a type.
+
+    :param types: a list of types that should be used for the tuple items.
+    """
+
+    def __init__(self, types):
+        self.types = [convert_type(ty) for ty in types]
+
+    @property
+    def name(self):
+        return "<{}>".format(" ".join(ty.name for ty in self.types))
+
+    @property
+    def arity(self):
+        return len(self.types)
+
+    def convert(self, value, param, ctx):
+        if len(value) != len(self.types):
+            raise TypeError(
+                "It would appear that nargs is set to conflict with the"
+                " composite type arity."
+            )
+        return tuple(ty(x, param, ctx) for ty, x in zip(self.types, value))
+
+
+def convert_type(ty, default=None):
+    """Converts a callable or python type into the most appropriate
+    param type.
+    """
+    guessed_type = False
+    if ty is None and default is not None:
+        if isinstance(default, tuple):
+            ty = tuple(map(type, default))
+        else:
+            ty = type(default)
+        guessed_type = True
+
+    if isinstance(ty, tuple):
+        return Tuple(ty)
+    if isinstance(ty, ParamType):
+        return ty
+    if ty is text_type or ty is str or ty is None:
+        return STRING
+    if ty is int:
+        return INT
+    # Booleans are only okay if not guessed.  This is done because for
+    # flags the default value is actually a bit of a lie in that it
+    # indicates which of the flags is the one we want.  See get_default()
+    # for more information.
+    if ty is bool and not guessed_type:
+        return BOOL
+    if ty is float:
+        return FLOAT
+    if guessed_type:
+        return STRING
+
+    # Catch a common mistake
+    if __debug__:
+        try:
+            if issubclass(ty, ParamType):
+                raise AssertionError(
+                    "Attempted to use an uninstantiated parameter type ({}).".format(ty)
+                )
+        except TypeError:
+            pass
+    return FuncParamType(ty)
+
+
+#: A dummy parameter type that just does nothing.  From a user's
+#: perspective this appears to just be the same as `STRING` but internally
+#: no string conversion takes place.  This is necessary to achieve the
+#: same bytes/unicode behavior on Python 2/3 in situations where you want
+#: to not convert argument types.  This is usually useful when working
+#: with file paths as they can appear in bytes and unicode.
+#:
+#: For path related uses the :class:`Path` type is a better choice but
+#: there are situations where an unprocessed type is useful which is why
+#: it is is provided.
+#:
+#: .. versionadded:: 4.0
+UNPROCESSED = UnprocessedParamType()
+
+#: A unicode string parameter type which is the implicit default.  This
+#: can also be selected by using ``str`` as type.
+STRING = StringParamType()
+
+#: An integer parameter.  This can also be selected by using ``int`` as
+#: type.
+INT = IntParamType()
+
+#: A floating point value parameter.  This can also be selected by using
+#: ``float`` as type.
+FLOAT = FloatParamType()
+
+#: A boolean parameter.  This is the default for boolean flags.  This can
+#: also be selected by using ``bool`` as a type.
+BOOL = BoolParamType()
+
+#: A UUID parameter.
+UUID = UUIDParameterType()
diff --git a/python3-vckonline/lib/python3.8/site-packages/click/utils.py b/python3-vckonline/lib/python3.8/site-packages/click/utils.py
new file mode 100644
index 0000000..79265e7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/click/utils.py
@@ -0,0 +1,455 @@
+import os
+import sys
+
+from ._compat import _default_text_stderr
+from ._compat import _default_text_stdout
+from ._compat import auto_wrap_for_ansi
+from ._compat import binary_streams
+from ._compat import filename_to_ui
+from ._compat import get_filesystem_encoding
+from ._compat import get_streerror
+from ._compat import is_bytes
+from ._compat import open_stream
+from ._compat import PY2
+from ._compat import should_strip_ansi
+from ._compat import string_types
+from ._compat import strip_ansi
+from ._compat import text_streams
+from ._compat import text_type
+from ._compat import WIN
+from .globals import resolve_color_default
+
+if not PY2:
+    from ._compat import _find_binary_writer
+elif WIN:
+    from ._winconsole import _get_windows_argv
+    from ._winconsole import _hash_py_argv
+    from ._winconsole import _initial_argv_hash
+
+echo_native_types = string_types + (bytes, bytearray)
+
+
+def _posixify(name):
+    return "-".join(name.split()).lower()
+
+
+def safecall(func):
+    """Wraps a function so that it swallows exceptions."""
+
+    def wrapper(*args, **kwargs):
+        try:
+            return func(*args, **kwargs)
+        except Exception:
+            pass
+
+    return wrapper
+
+
+def make_str(value):
+    """Converts a value into a valid string."""
+    if isinstance(value, bytes):
+        try:
+            return value.decode(get_filesystem_encoding())
+        except UnicodeError:
+            return value.decode("utf-8", "replace")
+    return text_type(value)
+
+
+def make_default_short_help(help, max_length=45):
+    """Return a condensed version of help string."""
+    words = help.split()
+    total_length = 0
+    result = []
+    done = False
+
+    for word in words:
+        if word[-1:] == ".":
+            done = True
+        new_length = 1 + len(word) if result else len(word)
+        if total_length + new_length > max_length:
+            result.append("...")
+            done = True
+        else:
+            if result:
+                result.append(" ")
+            result.append(word)
+        if done:
+            break
+        total_length += new_length
+
+    return "".join(result)
+
+
+class LazyFile(object):
+    """A lazy file works like a regular file but it does not fully open
+    the file but it does perform some basic checks early to see if the
+    filename parameter does make sense.  This is useful for safely opening
+    files for writing.
+    """
+
+    def __init__(
+        self, filename, mode="r", encoding=None, errors="strict", atomic=False
+    ):
+        self.name = filename
+        self.mode = mode
+        self.encoding = encoding
+        self.errors = errors
+        self.atomic = atomic
+
+        if filename == "-":
+            self._f, self.should_close = open_stream(filename, mode, encoding, errors)
+        else:
+            if "r" in mode:
+                # Open and close the file in case we're opening it for
+                # reading so that we can catch at least some errors in
+                # some cases early.
+                open(filename, mode).close()
+            self._f = None
+            self.should_close = True
+
+    def __getattr__(self, name):
+        return getattr(self.open(), name)
+
+    def __repr__(self):
+        if self._f is not None:
+            return repr(self._f)
+        return "<unopened file '{}' {}>".format(self.name, self.mode)
+
+    def open(self):
+        """Opens the file if it's not yet open.  This call might fail with
+        a :exc:`FileError`.  Not handling this error will produce an error
+        that Click shows.
+        """
+        if self._f is not None:
+            return self._f
+        try:
+            rv, self.should_close = open_stream(
+                self.name, self.mode, self.encoding, self.errors, atomic=self.atomic
+            )
+        except (IOError, OSError) as e:  # noqa: E402
+            from .exceptions import FileError
+
+            raise FileError(self.name, hint=get_streerror(e))
+        self._f = rv
+        return rv
+
+    def close(self):
+        """Closes the underlying file, no matter what."""
+        if self._f is not None:
+            self._f.close()
+
+    def close_intelligently(self):
+        """This function only closes the file if it was opened by the lazy
+        file wrapper.  For instance this will never close stdin.
+        """
+        if self.should_close:
+            self.close()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.close_intelligently()
+
+    def __iter__(self):
+        self.open()
+        return iter(self._f)
+
+
+class KeepOpenFile(object):
+    def __init__(self, file):
+        self._file = file
+
+    def __getattr__(self, name):
+        return getattr(self._file, name)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        pass
+
+    def __repr__(self):
+        return repr(self._file)
+
+    def __iter__(self):
+        return iter(self._file)
+
+
+def echo(message=None, file=None, nl=True, err=False, color=None):
+    """Prints a message plus a newline to the given file or stdout.  On
+    first sight, this looks like the print function, but it has improved
+    support for handling Unicode and binary data that does not fail no
+    matter how badly configured the system is.
+
+    Primarily it means that you can print binary data as well as Unicode
+    data on both 2.x and 3.x to the given file in the most appropriate way
+    possible.  This is a very carefree function in that it will try its
+    best to not fail.  As of Click 6.0 this includes support for unicode
+    output on the Windows console.
+
+    In addition to that, if `colorama`_ is installed, the echo function will
+    also support clever handling of ANSI codes.  Essentially it will then
+    do the following:
+
+    -   add transparent handling of ANSI color codes on Windows.
+    -   hide ANSI codes automatically if the destination file is not a
+        terminal.
+
+    .. _colorama: https://pypi.org/project/colorama/
+
+    .. versionchanged:: 6.0
+       As of Click 6.0 the echo function will properly support unicode
+       output on the windows console.  Not that click does not modify
+       the interpreter in any way which means that `sys.stdout` or the
+       print statement or function will still not provide unicode support.
+
+    .. versionchanged:: 2.0
+       Starting with version 2.0 of Click, the echo function will work
+       with colorama if it's installed.
+
+    .. versionadded:: 3.0
+       The `err` parameter was added.
+
+    .. versionchanged:: 4.0
+       Added the `color` flag.
+
+    :param message: the message to print
+    :param file: the file to write to (defaults to ``stdout``)
+    :param err: if set to true the file defaults to ``stderr`` instead of
+                ``stdout``.  This is faster and easier than calling
+                :func:`get_text_stderr` yourself.
+    :param nl: if set to `True` (the default) a newline is printed afterwards.
+    :param color: controls if the terminal supports ANSI colors or not.  The
+                  default is autodetection.
+    """
+    if file is None:
+        if err:
+            file = _default_text_stderr()
+        else:
+            file = _default_text_stdout()
+
+    # Convert non bytes/text into the native string type.
+    if message is not None and not isinstance(message, echo_native_types):
+        message = text_type(message)
+
+    if nl:
+        message = message or u""
+        if isinstance(message, text_type):
+            message += u"\n"
+        else:
+            message += b"\n"
+
+    # If there is a message, and we're in Python 3, and the value looks
+    # like bytes, we manually need to find the binary stream and write the
+    # message in there.  This is done separately so that most stream
+    # types will work as you would expect.  Eg: you can write to StringIO
+    # for other cases.
+    if message and not PY2 and is_bytes(message):
+        binary_file = _find_binary_writer(file)
+        if binary_file is not None:
+            file.flush()
+            binary_file.write(message)
+            binary_file.flush()
+            return
+
+    # ANSI-style support.  If there is no message or we are dealing with
+    # bytes nothing is happening.  If we are connected to a file we want
+    # to strip colors.  If we are on windows we either wrap the stream
+    # to strip the color or we use the colorama support to translate the
+    # ansi codes to API calls.
+    if message and not is_bytes(message):
+        color = resolve_color_default(color)
+        if should_strip_ansi(file, color):
+            message = strip_ansi(message)
+        elif WIN:
+            if auto_wrap_for_ansi is not None:
+                file = auto_wrap_for_ansi(file)
+            elif not color:
+                message = strip_ansi(message)
+
+    if message:
+        file.write(message)
+    file.flush()
+
+
+def get_binary_stream(name):
+    """Returns a system stream for byte processing.  This essentially
+    returns the stream from the sys module with the given name but it
+    solves some compatibility issues between different Python versions.
+    Primarily this function is necessary for getting binary streams on
+    Python 3.
+
+    :param name: the name of the stream to open.  Valid names are ``'stdin'``,
+                 ``'stdout'`` and ``'stderr'``
+    """
+    opener = binary_streams.get(name)
+    if opener is None:
+        raise TypeError("Unknown standard stream '{}'".format(name))
+    return opener()
+
+
+def get_text_stream(name, encoding=None, errors="strict"):
+    """Returns a system stream for text processing.  This usually returns
+    a wrapped stream around a binary stream returned from
+    :func:`get_binary_stream` but it also can take shortcuts on Python 3
+    for already correctly configured streams.
+
+    :param name: the name of the stream to open.  Valid names are ``'stdin'``,
+                 ``'stdout'`` and ``'stderr'``
+    :param encoding: overrides the detected default encoding.
+    :param errors: overrides the default error mode.
+    """
+    opener = text_streams.get(name)
+    if opener is None:
+        raise TypeError("Unknown standard stream '{}'".format(name))
+    return opener(encoding, errors)
+
+
+def open_file(
+    filename, mode="r", encoding=None, errors="strict", lazy=False, atomic=False
+):
+    """This is similar to how the :class:`File` works but for manual
+    usage.  Files are opened non lazy by default.  This can open regular
+    files as well as stdin/stdout if ``'-'`` is passed.
+
+    If stdin/stdout is returned the stream is wrapped so that the context
+    manager will not close the stream accidentally.  This makes it possible
+    to always use the function like this without having to worry to
+    accidentally close a standard stream::
+
+        with open_file(filename) as f:
+            ...
+
+    .. versionadded:: 3.0
+
+    :param filename: the name of the file to open (or ``'-'`` for stdin/stdout).
+    :param mode: the mode in which to open the file.
+    :param encoding: the encoding to use.
+    :param errors: the error handling for this file.
+    :param lazy: can be flipped to true to open the file lazily.
+    :param atomic: in atomic mode writes go into a temporary file and it's
+                   moved on close.
+    """
+    if lazy:
+        return LazyFile(filename, mode, encoding, errors, atomic=atomic)
+    f, should_close = open_stream(filename, mode, encoding, errors, atomic=atomic)
+    if not should_close:
+        f = KeepOpenFile(f)
+    return f
+
+
+def get_os_args():
+    """This returns the argument part of sys.argv in the most appropriate
+    form for processing.  What this means is that this return value is in
+    a format that works for Click to process but does not necessarily
+    correspond well to what's actually standard for the interpreter.
+
+    On most environments the return value is ``sys.argv[:1]`` unchanged.
+    However if you are on Windows and running Python 2 the return value
+    will actually be a list of unicode strings instead because the
+    default behavior on that platform otherwise will not be able to
+    carry all possible values that sys.argv can have.
+
+    .. versionadded:: 6.0
+    """
+    # We can only extract the unicode argv if sys.argv has not been
+    # changed since the startup of the application.
+    if PY2 and WIN and _initial_argv_hash == _hash_py_argv():
+        return _get_windows_argv()
+    return sys.argv[1:]
+
+
+def format_filename(filename, shorten=False):
+    """Formats a filename for user display.  The main purpose of this
+    function is to ensure that the filename can be displayed at all.  This
+    will decode the filename to unicode if necessary in a way that it will
+    not fail.  Optionally, it can shorten the filename to not include the
+    full path to the filename.
+
+    :param filename: formats a filename for UI display.  This will also convert
+                     the filename into unicode without failing.
+    :param shorten: this optionally shortens the filename to strip of the
+                    path that leads up to it.
+    """
+    if shorten:
+        filename = os.path.basename(filename)
+    return filename_to_ui(filename)
+
+
+def get_app_dir(app_name, roaming=True, force_posix=False):
+    r"""Returns the config folder for the application.  The default behavior
+    is to return whatever is most appropriate for the operating system.
+
+    To give you an idea, for an app called ``"Foo Bar"``, something like
+    the following folders could be returned:
+
+    Mac OS X:
+      ``~/Library/Application Support/Foo Bar``
+    Mac OS X (POSIX):
+      ``~/.foo-bar``
+    Unix:
+      ``~/.config/foo-bar``
+    Unix (POSIX):
+      ``~/.foo-bar``
+    Win XP (roaming):
+      ``C:\Documents and Settings\<user>\Local Settings\Application Data\Foo Bar``
+    Win XP (not roaming):
+      ``C:\Documents and Settings\<user>\Application Data\Foo Bar``
+    Win 7 (roaming):
+      ``C:\Users\<user>\AppData\Roaming\Foo Bar``
+    Win 7 (not roaming):
+      ``C:\Users\<user>\AppData\Local\Foo Bar``
+
+    .. versionadded:: 2.0
+
+    :param app_name: the application name.  This should be properly capitalized
+                     and can contain whitespace.
+    :param roaming: controls if the folder should be roaming or not on Windows.
+                    Has no affect otherwise.
+    :param force_posix: if this is set to `True` then on any POSIX system the
+                        folder will be stored in the home folder with a leading
+                        dot instead of the XDG config home or darwin's
+                        application support folder.
+    """
+    if WIN:
+        key = "APPDATA" if roaming else "LOCALAPPDATA"
+        folder = os.environ.get(key)
+        if folder is None:
+            folder = os.path.expanduser("~")
+        return os.path.join(folder, app_name)
+    if force_posix:
+        return os.path.join(os.path.expanduser("~/.{}".format(_posixify(app_name))))
+    if sys.platform == "darwin":
+        return os.path.join(
+            os.path.expanduser("~/Library/Application Support"), app_name
+        )
+    return os.path.join(
+        os.environ.get("XDG_CONFIG_HOME", os.path.expanduser("~/.config")),
+        _posixify(app_name),
+    )
+
+
+class PacifyFlushWrapper(object):
+    """This wrapper is used to catch and suppress BrokenPipeErrors resulting
+    from ``.flush()`` being called on broken pipe during the shutdown/final-GC
+    of the Python interpreter. Notably ``.flush()`` is always called on
+    ``sys.stdout`` and ``sys.stderr``. So as to have minimal impact on any
+    other cleanup code, and the case where the underlying file is not a broken
+    pipe, all calls and attributes are proxied.
+    """
+
+    def __init__(self, wrapped):
+        self.wrapped = wrapped
+
+    def flush(self):
+        try:
+            self.wrapped.flush()
+        except IOError as e:
+            import errno
+
+            if e.errno != errno.EPIPE:
+                raise
+
+    def __getattr__(self, attr):
+        return getattr(self.wrapped, attr)
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/METADATA
new file mode 100644
index 0000000..dfaef7b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/METADATA
@@ -0,0 +1,277 @@
+Metadata-Version: 2.1
+Name: dict-toolbox
+Version: 1.12
+Summary: Dict tools for Python projects
+Home-page: https://gitlab.com/saltstack/open/dict-toolbox
+Author: Tyler Johnson
+Author-email: tjohnson@saltstack.com
+License: UNKNOWN
+Platform: UNKNOWN
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Development Status :: 5 - Production/Stable
+Requires-Python: >=3.6
+Description-Content-Type: text/x-rst
+Requires-Dist: msgpack
+Requires-Dist: pyyaml (>=5.1)
+
+============
+DICT-TOOLBOX
+============
+
+INSTALLATION
+============
+.. code-block:: bash
+
+    pip install dict-toolbox
+
+Contains various dict tools from the `Salt Project <https://github.com/saltstack/salt>`_.
+
+Differ
+======
+.. code-block:: python
+
+    from dict_tools import differ
+
+deep_diff
+---------
+Computes the difference between to dictionaries.
+
+recursive_diff
+--------------
+Computes the recursive difference between two dictionaries.
+
+Trim
+====
+.. code-block:: python
+
+    from dict_tools import trim
+
+trim_dict
+---------
+Takes a dictionary and iterates over its keys, looking for
+large values and replacing them with a trimmed string.
+
+
+Update
+======
+.. code-block:: python
+
+    from dict_tools import trim
+
+
+update
+------
+Merges "upd" recursively into the target
+
+merge_list
+----------
+
+merge_recurse
+-------------
+
+merge_aggregate
+---------------
+
+merge_overwrite
+---------------
+
+merge
+-----
+
+ensure_dict_key
+---------------
+Ensures that in_dict contains the series of recursive keys defined in keys.
+
+set_dict_key_value
+------------------
+Ensures that in_dict contains the series of recursive keys defined in keys.
+Also sets whatever is at the end of `in_dict` traversed with `keys` to `value`.
+
+update_dict_key_value
+---------------------
+Ensures that in_dict contains the series of recursive keys defined in keys.
+Also updates the dict, that is at the end of `in_dict` traversed with `keys`,
+with `value`.
+
+append_dict_key_value
+---------------------
+Ensures that in_dict contains the series of recursive keys defined in keys.
+Also appends `value` to the list that is at the end of `in_dict` traversed
+with `keys`.
+
+extend_dict_key_value
+---------------------
+Ensures that in_dict contains the series of recursive keys defined in keys.
+Also extends the list, that is at the end of `in_dict` traversed with `keys`,
+with `value`.
+
+
+XML
+===
+.. code-block:: python
+
+    from dict_tools import xml
+
+to_dict
+-------
+Convert an XML tree into a dict. The tree that is passed in must be an
+ElementTree object.
+
+YAMLEX
+======
+.. code-block:: python
+
+    from dict_tools import yamlex
+
+YAMLEX is a format that allows for things like sls files to be
+more intuitive.
+
+SLSMap
+------
+Ensures that dict str() and repr() are YAML friendly.
+
+SLSString
+---------
+Ensures that str str() and repr() are YAML friendly.
+
+AggregatedMap
+-------------
+
+AggregatedSequence
+------------------
+
+Dumper
+------
+sls dumper.
+
+merge_recursive
+---------------
+Merge obj_b into obj_a.
+
+MySQL
+=====
+.. code-block:: python
+
+    from dict_tools import mysql
+
+to_num
+------
+Convert a string to a number.
+
+
+to_dict
+-------
+Convert MySQL-style output to a python dictionary.
+
+
+DATA
+====
+.. code-block:: python
+
+    from dict_tools import data
+
+CaseInsensitiveDict
+-------------------
+Inspired by requests' case-insensitive dict implementation, but works with
+non-string keys as well.
+
+ImmutableDict
+-------------
+An immutable mapping that can access it's keys via the namespace
+
+NamespaceDict
+-------------
+A dictionary that can access it's string keys through the namespace
+
+
+compare_dicts
+-------------
+Compare before and after results from various functions, returning a
+dict describing the chagnes that were made.
+
+is_dictlist
+-----------
+Returns True if data is a list of one-element dicts (as found in many SLS schemas)
+
+object_to_dict
+--------------
+Convert an arbitrary object to a dictionary
+
+recursive_diff
+--------------
+Performs a recursive diff on mappings and/or iterables and returns the result
+in a {'old': values, 'new': values}-style.
+Compares dicts and sets unordered (obviously), OrderedDicts and Lists ordered
+(but only if both ``old`` and ``new`` are of the same type),
+all other Mapping types unordered, and all other iterables ordered.
+
+repack_dictlist
+---------------
+Takes a list of one-element dicts (as found in many SLS schemas) and
+repacks into a single dictionary.
+
+subdict_match
+-------------
+Check for a match in a dictionary using a delimiter character to denote
+levels of subdicts, and also allowing the delimiter character to be
+matched. Thus, 'foo:bar:baz' will match data['foo'] == 'bar:baz' and
+data['foo']['bar'] == 'baz'. The latter would take priority over the
+former, as more deeply-nested matches are tried first.
+
+
+traverse_dict
+-------------
+Traverse a dict using a colon-delimited (or otherwise delimited, using the
+'delimiter' param) target string. The target 'foo:bar:baz' will return
+data['foo']['bar']['baz'] if this value exists, and will otherwise return
+the dict in the default argument.
+
+traverse_dict_and_list
+----------------------
+Traverse a dict or list using a colon-delimited (or otherwise delimited,
+using the 'delimiter' param) target string. The target 'foo:bar:0' will
+return data['foo']['bar'][0] if this value exists, and will otherwise
+return the dict in the default argument.
+Function will automatically determine the target type.
+The target 'foo:bar:0' will return data['foo']['bar'][0] if data like
+{'foo':{'bar':['baz']}} , if data like {'foo':{'bar':{'0':'baz'}}}
+then return data['foo']['bar']['0']
+
+Arg
+===
+.. code-block:: python
+
+    from dict_tools import arg
+
+yamlify_arg
+-----------
+yaml.safe_load the arg
+
+
+Aggregation
+===========
+.. code-block:: python
+
+    from dict_tools import aggregation
+
+Makes it possible to introspect dataset and aggregate nodes
+when it is instructed
+
+
+levelise
+--------
+Describe which levels are allowed to do deep merging.
+
+mark
+----
+Convert obj into an Aggregate instance
+
+aggregate
+---------
+Merge obj_b into obj_a.
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/RECORD
new file mode 100644
index 0000000..42f3fe7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/RECORD
@@ -0,0 +1,27 @@
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+dict_toolbox-1.12.dist-info/METADATA,sha256=HQ_StKgLa_by3c6KwMQoO-bF-b7wsK4FGq1rXTcgKVY,6158
+dict_toolbox-1.12.dist-info/RECORD,,
+dict_toolbox-1.12.dist-info/WHEEL,sha256=g4nMs7d-Xl9-xC9XovUrsDHGXt-FT0E17Yqo92DEfvY,92
+dict_toolbox-1.12.dist-info/top_level.txt,sha256=b5xl58qnTrLt_XGGTWWgasN1vcKhM0yF7Inzfhyy_Yo,11
+dict_tools/__init__.py,sha256=byeqWsYMx8AHKzIn6cLWBcDDT9vEmwdgjpwlkGXFLVU,348
+dict_tools/__pycache__/__init__.cpython-38.pyc,,
+dict_tools/__pycache__/aggregation.cpython-38.pyc,,
+dict_tools/__pycache__/args.cpython-38.pyc,,
+dict_tools/__pycache__/data.cpython-38.pyc,,
+dict_tools/__pycache__/differ.cpython-38.pyc,,
+dict_tools/__pycache__/mysql.cpython-38.pyc,,
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+dict_tools/__pycache__/update.cpython-38.pyc,,
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+dict_tools/differ.py,sha256=QOJSopmnmSGZyp5gggGf7S19vu9CU41qW2u18bHOWHg,15099
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+dict_tools/trim.py,sha256=91aYYQo39h8wxyHM_G48OC1tIxU5MMTUr2uBrz77olc,4087
+dict_tools/update.py,sha256=_AerSv4DuAYKV_mXoq6LoH9RV5GogKO_VhG9kCb-SI8,9570
+dict_tools/utils.py,sha256=TR4LY2p51WD1boQoba4panRRPIdhm4sd5_0tSgc8pIQ,755
+dict_tools/xml.py,sha256=Ix6aXgUlWahLvycOoWtGfVObfQ6cKirW0t9Zr_8KXXY,3117
+dict_tools/yamlex.py,sha256=-JisOWylBUEWfzHvNMWktKpjdCDXqv-w8p6acGO2BAA,12078
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/WHEEL
new file mode 100644
index 0000000..b552003
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/top_level.txt
new file mode 100644
index 0000000..a7582a5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_toolbox-1.12.dist-info/top_level.txt
@@ -0,0 +1 @@
+dict_tools
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/__init__.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/__init__.py
new file mode 100644
index 0000000..37b0866
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/__init__.py
@@ -0,0 +1,12 @@
+# -*- coding: utf-8 -*-
+"""
+Default values, to be imported elsewhere in Salt code
+
+Do NOT, import any salt modules (salt.utils, salt.config, etc.) into this file,
+as this may result in circular imports.
+"""
+
+# Default delimiter for multi-level traversal in targeting
+DEFAULT_TARGET_DELIM = ":"
+
+from . import data, differ, mysql, trim, update, xml
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diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/aggregation.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/aggregation.py
new file mode 100644
index 0000000..ff516c5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/aggregation.py
@@ -0,0 +1,240 @@
+# -*- coding: utf-8 -*-
+"""
+    This library makes it possible to introspect dataset and aggregate nodes
+    when it is instructed.
+
+    .. note::
+
+        The following examples with be expressed in YAML for convenience's sake:
+
+        - !aggr-scalar will refer to Scalar python function
+        - !aggr-map will refer to Map python object
+        - !aggr-seq will refer for Sequence python object
+
+
+    How to instructs merging
+    ------------------------
+
+    This yaml document has duplicate keys:
+
+    .. code-block:: yaml
+
+        foo: !aggr-scalar first
+        foo: !aggr-scalar second
+        bar: !aggr-map {first: foo}
+        bar: !aggr-map {second: bar}
+        baz: !aggr-scalar 42
+
+    but tagged values instruct Salt that overlapping values they can be merged
+    together:
+
+    .. code-block:: yaml
+
+        foo: !aggr-seq [first, second]
+        bar: !aggr-map {first: foo, second: bar}
+        baz: !aggr-seq [42]
+
+
+    Default merge strategy is keep untouched
+    ----------------------------------------
+
+    For example, this yaml document still has duplicate keys, but does not
+    instruct aggregation:
+
+    .. code-block:: yaml
+
+        foo: first
+        foo: second
+        bar: {first: foo}
+        bar: {second: bar}
+        baz: 42
+
+    So the late found values prevail:
+
+    .. code-block:: yaml
+
+        foo: second
+        bar: {second: bar}
+        baz: 42
+
+
+    Limitations
+    -----------
+
+    Aggregation is permitted between tagged objects that share the same type.
+    If not, the default merge strategy prevails.
+
+    For example, these examples:
+
+    .. code-block:: yaml
+
+        foo: {first: value}
+        foo: !aggr-map {second: value}
+
+        bar: !aggr-map {first: value}
+        bar: 42
+
+        baz: !aggr-seq [42]
+        baz: [fail]
+
+        qux: 42
+        qux: !aggr-scalar fail
+
+    are interpreted like this:
+
+    .. code-block:: yaml
+
+        foo: !aggr-map{second: value}
+
+        bar: 42
+
+        baz: [fail]
+
+        qux: !aggr-seq [fail]
+
+
+    Introspection
+    -------------
+
+    TODO: write this part
+
+"""
+from typing import Iterable, Tuple
+import copy
+import logging
+import collections
+
+__all__ = ["aggregate", "Aggregate", "Map", "Scalar", "Sequence"]
+
+log = logging.getLogger(__name__)
+
+
+class Aggregate(object):
+    """
+    Aggregation base.
+    """
+
+
+class Map(collections.OrderedDict, Aggregate):
+    """
+    Map aggregation.
+    """
+
+
+class Sequence(list, Aggregate):
+    """
+    Sequence aggregation.
+    """
+
+
+def Scalar(obj):
+    """
+    Shortcut for Sequence creation
+
+    >>> Scalar('foo') == Sequence(['foo'])
+    True
+    """
+    return Sequence([obj])
+
+
+def levelise(level: bool or int or Iterable) -> Tuple[bool, bool or int]:
+    """
+    Describe which levels are allowed to do deep merging.
+
+    level can be:
+
+    True
+        all levels are True
+
+    False
+        all levels are False
+
+    an int
+        only the first levels are True, the others are False
+
+    a sequence
+        it describes which levels are True, it can be:
+
+        * a list of bool and int values
+        * a string of 0 and 1 characters
+
+    """
+
+    if not level:  # False, 0, [] ...
+        return False, False
+    if level is True:
+        return True, True
+    if isinstance(level, int):
+        return True, level - 1
+    try:  # a sequence
+        deep, subs = int(level[0]), level[1:]
+        return bool(deep), subs
+    except Exception as error:  # pylint: disable=broad-except
+        log.warning(error)
+        raise
+
+
+def mark(
+    obj: object, map_class: object = Map, sequence_class: object = Sequence
+) -> object:
+    """
+    Convert obj into an Aggregate instance
+    """
+    if isinstance(obj, Aggregate):
+        return obj
+    if isinstance(obj, dict):
+        return map_class(obj)
+    if isinstance(obj, (list, tuple, set)):
+        return sequence_class(obj)
+    else:
+        return sequence_class([obj])
+
+
+def aggregate(
+    obj_a,
+    obj_b,
+    level: bool or int = False,
+    map_class: object = Map,
+    sequence_class: object = Sequence,
+):
+    """
+    Merge obj_b into obj_a.
+
+    >>> aggregate('first', 'second', True) == ['first', 'second']
+    True
+    """
+    deep, subdeep = levelise(level)
+
+    if deep:
+        obj_a = mark(obj_a, map_class=map_class, sequence_class=sequence_class)
+        obj_b = mark(obj_b, map_class=map_class, sequence_class=sequence_class)
+
+    if isinstance(obj_a, dict) and isinstance(obj_b, dict):
+        if isinstance(obj_a, Aggregate) and isinstance(obj_b, Aggregate):
+            # deep merging is more or less a.update(obj_b)
+            response = copy.copy(obj_a)
+        else:
+            # introspection on obj_b keys only
+            response = copy.copy(obj_b)
+
+        for key, value in obj_b.items():
+            if key in obj_a:
+                value = aggregate(obj_a[key], value, subdeep, map_class, sequence_class)
+            response[key] = value
+        return response
+
+    if isinstance(obj_a, Sequence) and isinstance(obj_b, Sequence):
+        response = obj_a.__class__(obj_a[:])
+        for value in obj_b:
+            if value not in obj_a:
+                response.append(value)
+        return response
+
+    response = copy.copy(obj_b)
+
+    if isinstance(obj_a, Aggregate) or isinstance(obj_b, Aggregate):
+        log.info("only one value marked as aggregate. keep `obj_b` value")
+        return response
+
+    log.debug("no value marked as aggregate. keep `obj_b` value")
+    return response
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/args.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/args.py
new file mode 100644
index 0000000..04b5b48
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/args.py
@@ -0,0 +1,89 @@
+import yaml
+
+
+def yamlify_arg(arg):
+    """
+    yaml.safe_load the arg
+    """
+    if not isinstance(arg, str):
+        return arg
+
+    # YAML loads empty (or all whitespace) strings as None:
+    #
+    # >>> import yaml
+    # >>> yaml.load('') is None
+    # True
+    # >>> yaml.load('      ') is None
+    # True
+    #
+    # Similarly, YAML document start/end markers would not load properly if
+    # passed through PyYAML, as loading '---' results in None and '...' raises
+    # an exception.
+    #
+    # Therefore, skip YAML loading for these cases and just return the string
+    # that was passed in.
+    if arg.strip() in ("", "---", "..."):
+        return arg
+
+    elif "_" in arg and all([x in "0123456789_" for x in arg.strip()]):
+        # When the stripped string includes just digits and underscores, the
+        # underscores are ignored and the digits are combined together and
+        # loaded as an int. We don't want that, so return the original value.
+        return arg
+
+    else:
+        if any(np_char in arg for np_char in ("\t", "\r", "\n")):
+            # Don't mess with this CLI arg, since it has one or more
+            # non-printable whitespace char. Since the CSafeLoader will
+            # sanitize these chars rather than raise an exception, just
+            # skip YAML loading of this argument and keep the argument as
+            # passed on the CLI.
+            return arg
+
+    try:
+        original_arg = arg
+        if "#" in arg:
+            # Only yamlify if it parses into a non-string type, to prevent
+            # loss of content due to # as comment character
+            parsed_arg = yaml.safe_load(arg)
+            if isinstance(parsed_arg, str) or parsed_arg is None:
+                return arg
+            return parsed_arg
+        if arg == "None":
+            arg = None
+        else:
+            arg = yaml.safe_load(arg)
+
+        if isinstance(arg, dict):
+            # dicts must be wrapped in curly braces
+            if isinstance(original_arg, str) and not original_arg.startswith("{"):
+                return original_arg
+            else:
+                return arg
+
+        elif isinstance(arg, list):
+            # lists must be wrapped in brackets
+            if isinstance(original_arg, str) and not original_arg.startswith("["):
+                return original_arg
+            else:
+                return arg
+
+        elif arg is None or isinstance(arg, (list, float, int, str)):
+            # yaml.safe_load will load '|' and '!' as '', don't let it do that.
+            if arg == "" and original_arg in ("|", "!"):
+                return original_arg
+            # yaml.safe_load will treat '#' as a comment, so a value of '#'
+            # will become None. Keep this value from being stomped as well.
+            elif arg is None and original_arg.strip().startswith("#"):
+                return original_arg
+            # Other times, yaml.safe_load will load '!' as None. Prevent that.
+            elif arg is None and original_arg == "!":
+                return original_arg
+            else:
+                return arg
+        else:
+            # we don't support this type
+            return original_arg
+    except Exception:  # pylint: disable=broad-except
+        # In case anything goes wrong...
+        return original_arg
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/data.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/data.py
new file mode 100644
index 0000000..3640d1b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/data.py
@@ -0,0 +1,696 @@
+import copy
+import fnmatch
+import logging
+import re
+import yaml
+
+from . import DEFAULT_TARGET_DELIM
+from . import args
+from collections.abc import Mapping, MutableMapping, Sequence
+from typing import Any, Dict, Iterable, List, Set
+
+log = logging.getLogger(__name__)
+
+
+class CaseInsensitiveDict(MutableMapping):
+    """
+    Inspired by requests' case-insensitive dict implementation, but works with
+    non-string keys as well.
+    """
+
+    def __init__(self, init=None, **kwargs):
+        """
+        Force internal dict to be ordered to ensure a consistent iteration
+        order, irrespective of case.
+        """
+        self._data = {}
+        self.update(init or {}, **kwargs)
+
+    def __len__(self):
+        return len(self._data)
+
+    def __setitem__(self, key, value):
+        # Store the case-sensitive key so it is available for dict iteration
+        self._data[to_lowercase(key)] = (key, value)
+
+    def __delitem__(self, key):
+        del self._data[to_lowercase(key)]
+
+    def __getitem__(self, key):
+        return self._data[to_lowercase(key)][1]
+
+    def __iter__(self):
+        return (item[0] for item in self._data.values())
+
+    def __eq__(self, rval):
+        if not isinstance(rval, Mapping):
+            # Comparing to non-mapping type (e.g. int) is always False
+            return False
+        return dict(self.items_lower()) == dict(CaseInsensitiveDict(rval).items_lower())
+
+    def __repr__(self):
+        return repr(dict(self.items()))
+
+    def items_lower(self):
+        """
+        Returns a generator iterating over keys and values, with the keys all
+        being lowercase.
+        """
+        return ((key, val[1]) for key, val in self._data.items())
+
+    def copy(self):
+        """
+        Returns a copy of the object
+        """
+        return CaseInsensitiveDict(self._data.items())
+
+
+class ImmutableDict(Mapping):
+    """
+    An abstract base class that implements the interface of a `dict` but is immutable.
+    Items can be retrieved via namespacing.
+    No values can be changed after initialization
+    """
+
+    def __init__(self, init_: Dict[str, Any], **c_kwargs):
+        """
+        :param init_: A dictionary from which to inherit data
+        """
+        init_.update(**c_kwargs)
+        values = {}
+        for k, v in init_.items():
+            if isinstance(v, Dict):
+                values[k] = ImmutableDict(init_=v)
+            elif isinstance(v, (tuple, int, str, bytes)):
+                values[k] = v
+            elif isinstance(v, Iterable):
+                values[k] = tuple(v)
+            else:
+                values[k] = v
+        # __setattr__ is borked (on purpose) so we have to call it from super() right here
+        super().__setattr__("_ImmutableDict__store", values)
+
+    def __setattr__(self, k: str, v: Any):
+        raise TypeError(
+            f"{self.__class__.__name__} does not support attribute assignment"
+        )
+
+    def __getattr__(self, k: str):
+        return self.__store[k]
+
+    def __getitem__(self, k: str) -> Any:
+        return self.__store[k]
+
+    def __contains__(self, k: str) -> bool:
+        return k in self.__store
+
+    def __iter__(self):
+        return iter(self.__store)
+
+    def __len__(self) -> int:
+        return len(self.__store.keys())
+
+    def __copy__(self) -> Dict[str, Any]:
+        ret = {}
+        # Unpack IMAP items so that it's turtles all the way down
+        for k, v in self.__store.items():
+            if isinstance(v, ImmutableDict):
+                ret[k] = v.__copy__()
+            else:
+                ret[k] = v
+        return ret
+
+    def __repr__(self):
+        return repr(copy.copy(self))
+
+
+class NamespaceDict(dict):
+    """
+    A dictionary that can access it's string keys through the namespace
+    """
+
+    def __init__(self, seq: Iterable = None, **kwargs):
+        """
+        NamespaceDict() -> new empty namespaced dictionary
+        NamespaceDict(mapping) -> new namespaced dictionary initialized from a mapping object's
+            (key, value) pairs
+        NamespaceDict(iterable) -> new namespaced dictionary initialized as if via:
+            d = {}
+            for k, v in iterable:
+                d[k] = v
+        NamespaceDict(**kwargs) -> new namespaced dictionary initialized with the name=value pairs
+            in the keyword argument list.  For example:  NamespaceDict(one=1, two=2)
+        """
+        if seq is None:
+            super().__init__(**kwargs)
+        else:
+            super().__init__(seq, **kwargs)
+
+    def __setattr__(self, k: str, v: Any):
+        if isinstance(v, dict) and not isinstance(v, NamespaceDict):
+            v = NamespaceDict(v)
+        self[k] = v
+
+    def __getattr__(self, k: str):
+        if k.startswith("_"):
+            return super().__getattribute__(k)
+        return self[k]
+
+    def __copy__(self):
+        return NamespaceDict(self.copy())
+
+    def __deepcopy__(self, memodict=None):
+        if memodict is None:
+            memodict = {}
+        return NamespaceDict(copy.deepcopy(self.copy(), memodict))
+
+
+def __change_case(data, attr, preserve_dict_class=False):
+    """
+    Calls data.attr() if data has an attribute/method called attr.
+    Processes data recursively if data is a Mapping or Sequence.
+    For Mapping, processes both keys and values.
+    """
+    try:
+        return getattr(data, attr)()
+    except AttributeError:
+        pass
+
+    data_type = data.__class__
+
+    if isinstance(data, Mapping):
+        return (data_type if preserve_dict_class else dict)(
+            (
+                __change_case(key, attr, preserve_dict_class),
+                __change_case(val, attr, preserve_dict_class),
+            )
+            for key, val in data.items()
+        )
+    if isinstance(data, Sequence):
+        return data_type(
+            __change_case(item, attr, preserve_dict_class) for item in data
+        )
+    return data
+
+
+def _remove_circular_refs(ob, _seen: Set = None):
+    """
+    Generic method to remove circular references from objects.
+    This has been taken from author Martijn Pieters
+    https://stackoverflow.com/questions/44777369/
+    remove-circular-references-in-dicts-lists-tuples/44777477#44777477
+    :param ob: dict, list, typle, set, and frozenset
+        Standard python object
+    :param object _seen:
+        Object that has circular reference
+    :returns:
+        Cleaned Python object
+    """
+    if _seen is None:
+        _seen = set()
+    if id(ob) in _seen:
+        # Here we caught a circular reference.
+        # Alert user and cleanup to continue.
+        log.exception(
+            "Caught a circular reference in data structure below."
+            "Cleaning and continuing execution.\n%r\n",
+            ob,
+        )
+        return None
+    _seen.add(id(ob))
+    res = ob
+    if isinstance(ob, dict):
+        res = {
+            _remove_circular_refs(k, _seen): _remove_circular_refs(v, _seen)
+            for k, v in ob.items()
+        }
+    elif isinstance(ob, (list, tuple, set, frozenset)):
+        res = type(ob)(_remove_circular_refs(v, _seen) for v in ob)
+    # remove id again; only *nested* references count
+    _seen.remove(id(ob))
+    return res
+
+
+def compare_dicts(old: Dict = None, new: Dict = None) -> Dict[str, Dict]:
+    """
+    Compare before and after results from various salt functions, returning a
+    dict describing the changes that were made.
+    """
+    ret = {}
+    for key in set((new or {})).union((old or {})):
+        if key not in old:
+            # New key
+            ret[key] = {"old": "", "new": new[key]}
+        elif key not in new:
+            # Key removed
+            ret[key] = {"new": "", "old": old[key]}
+        elif new[key] != old[key]:
+            # Key modified
+            ret[key] = {"old": old[key], "new": new[key]}
+    return ret
+
+
+def object_to_dict(obj) -> Dict:
+    """
+    Convert an object to a dictionary
+    """
+    if isinstance(obj, list) or isinstance(obj, tuple):
+        ret = []
+        for item in obj:
+            ret.append(object_to_dict(item))
+    elif hasattr(obj, "__dict__"):
+        ret = {}
+        for item in obj.__dict__:
+            if item.startswith("_"):
+                continue
+            ret[item] = object_to_dict(obj.__dict__[item])
+    else:
+        ret = obj
+    return ret
+
+
+def is_dictlist(data: List) -> bool:
+    """
+    Returns True if data is a list of one-element dicts (as found in many SLS
+    schemas), otherwise returns False
+    """
+    if isinstance(data, list):
+        for element in data:
+            if isinstance(element, dict):
+                if len(element) != 1:
+                    return False
+            else:
+                return False
+        return True
+    return False
+
+
+def recursive_diff(
+    old: Iterable,
+    new: Iterable,
+    ignore_keys: List = None,
+    ignore_order: bool = False,
+    ignore_missing_keys: bool = False,
+) -> Dict[str, Iterable]:
+    """
+    Performs a recursive diff on mappings and/or iterables and returns the result
+    in a {'old': values, 'new': values}-style.
+    Compares dicts and sets unordered (obviously), OrderedDicts and Lists ordered
+    (but only if both ``old`` and ``new`` are of the same type),
+    all other Mapping types unordered, and all other iterables ordered.
+
+    :param old: Mapping or Iterable to compare from.
+    :param new: Mapping or Iterable to compare to.
+    :param ignore_keys: List of keys to ignore when comparing Mappings.
+    :param ignore_order: Compare ordered mapping/iterables as if they were unordered.
+    :param ignore_missing_keys: Do not return keys only present in ``old``
+        but missing in ``new``. Only works for regular dicts.
+    :return dict: Returns dict with keys 'old' and 'new' containing the differences.
+    """
+    ignore_keys = ignore_keys or []
+    ret_old = copy.deepcopy(old)
+    ret_new = copy.deepcopy(new)
+    if isinstance(old, Mapping) and isinstance(new, Mapping) and not ignore_order:
+        append_old, append_new = [], []
+        if len(old) != len(new):
+            min_length = min(len(old), len(new))
+            # The list coercion is required for Py3
+            append_old = list(old.keys())[min_length:]
+            append_new = list(new.keys())[min_length:]
+        # Compare ordered
+        for (key_old, key_new) in zip(old, new):
+            if key_old == key_new:
+                if key_old in ignore_keys:
+                    del ret_old[key_old]
+                    del ret_new[key_new]
+                else:
+                    res = recursive_diff(
+                        old[key_old],
+                        new[key_new],
+                        ignore_keys=ignore_keys,
+                        ignore_order=ignore_order,
+                        ignore_missing_keys=ignore_missing_keys,
+                    )
+                    if not res:  # Equal
+                        del ret_old[key_old]
+                        del ret_new[key_new]
+                    else:
+                        ret_old[key_old] = res["old"]
+                        ret_new[key_new] = res["new"]
+            else:
+                if key_old in ignore_keys:
+                    del ret_old[key_old]
+                if key_new in ignore_keys:
+                    del ret_new[key_new]
+        # If the OrderedDicts were of inequal length, add the remaining key/values.
+        for item in append_old:
+            ret_old[item] = old[item]
+        for item in append_new:
+            ret_new[item] = new[item]
+        ret = {"old": ret_old, "new": ret_new} if ret_old or ret_new else {}
+    elif isinstance(old, Mapping) and isinstance(new, Mapping):
+        # Compare unordered
+        for key in set(list(old) + list(new)):
+            if key in ignore_keys:
+                del ret_old[key]
+                del ret_new[key]
+            elif key in old and key in new:
+                res = recursive_diff(
+                    old[key],
+                    new[key],
+                    ignore_keys=ignore_keys,
+                    ignore_order=ignore_order,
+                    ignore_missing_keys=ignore_missing_keys,
+                )
+                if not res:  # Equal
+                    del ret_old[key]
+                    del ret_new[key]
+                else:
+                    ret_old[key] = res["old"]
+                    ret_new[key] = res["new"]
+            elif ignore_missing_keys and key in old:
+                del ret_old[key]
+        ret = {"old": ret_old, "new": ret_new} if ret_old or ret_new else {}
+    elif isinstance(old, set) and isinstance(new, set):
+        ret = {"old": old - new, "new": new - old} if old - new or new - old else {}
+    elif (
+        isinstance(old, Iterable)
+        and not isinstance(old, str)
+        and isinstance(new, Iterable)
+        and not isinstance(new, str)
+    ):
+        # Create a list so we can edit on an index-basis.
+        list_old = list(ret_old)
+        list_new = list(ret_new)
+        if ignore_order:
+            for item_old in old:
+                for item_new in new:
+                    res = recursive_diff(
+                        item_old,
+                        item_new,
+                        ignore_keys=ignore_keys,
+                        ignore_order=ignore_order,
+                        ignore_missing_keys=ignore_missing_keys,
+                    )
+                    if not res:
+                        list_old.remove(item_old)
+                        list_new.remove(item_new)
+                        continue
+        else:
+            remove_indices = []
+            for index, (iter_old, iter_new) in enumerate(zip(old, new)):
+                res = recursive_diff(
+                    iter_old,
+                    iter_new,
+                    ignore_keys=ignore_keys,
+                    ignore_order=ignore_order,
+                    ignore_missing_keys=ignore_missing_keys,
+                )
+                if not res:  # Equal
+                    remove_indices.append(index)
+                else:
+                    list_old[index] = res["old"]
+                    list_new[index] = res["new"]
+            for index in reversed(remove_indices):
+                list_old.pop(index)
+                list_new.pop(index)
+        # Instantiate a new whatever-it-was using the list as iterable source.
+        # This may not be the most optimized in way of speed and memory usage,
+        # but it will work for all iterable types.
+        ret = (
+            {"old": type(old)(list_old), "new": type(new)(list_new)}
+            if list_old or list_new
+            else {}
+        )
+    else:
+        ret = {} if old == new else {"old": ret_old, "new": ret_new}
+    return ret
+
+
+def repack_dictlist(data, strict=False, recurse=False, key_cb=None, val_cb=None):
+    """
+    Takes a list of one-element dicts (as found in many SLS schemas) and
+    repacks into a single dictionary.
+    """
+    if isinstance(data, str):
+        try:
+            data = yaml.safe_load(data)
+        except yaml.parser.ParserError as err:
+            log.error(err)
+            return {}
+
+    if key_cb is None:
+        key_cb = lambda x: x
+    if val_cb is None:
+        val_cb = lambda x, y: y
+
+    valid_non_dict = (str, int, float)
+    if isinstance(data, list):
+        for element in data:
+            if isinstance(element, valid_non_dict):
+                continue
+            if isinstance(element, dict):
+                if len(element) != 1:
+                    log.error(
+                        "Invalid input for repack_dictlist: key/value pairs "
+                        "must contain only one element (data passed: %s).",
+                        element,
+                    )
+                    return {}
+            else:
+                log.error(
+                    "Invalid input for repack_dictlist: element %s is "
+                    "not a string/dict/numeric value",
+                    element,
+                )
+                return {}
+    else:
+        log.error(
+            "Invalid input for repack_dictlist, data passed is not a list " "(%s)", data
+        )
+        return {}
+
+    ret = {}
+    for element in data:
+        if isinstance(element, valid_non_dict):
+            ret[key_cb(element)] = None
+        else:
+            key = next(iter(element))
+            val = element[key]
+            if is_dictlist(val):
+                if recurse:
+                    ret[key_cb(key)] = repack_dictlist(val, recurse=recurse)
+                elif strict:
+                    log.error(
+                        "Invalid input for repack_dictlist: nested dictlist "
+                        "found, but recurse is set to False"
+                    )
+                    return {}
+                else:
+                    ret[key_cb(key)] = val_cb(key, val)
+            else:
+                ret[key_cb(key)] = val_cb(key, val)
+    return ret
+
+
+def subdict_match(
+    data: Dict,
+    expr: str,
+    delimiter: str = DEFAULT_TARGET_DELIM,
+    regex_match: bool = False,
+    exact_match: bool = False,
+) -> bool:
+    """
+    Check for a match in a dictionary using a delimiter character to denote
+    levels of subdicts, and also allowing the delimiter character to be
+    matched. Thus, 'foo:bar:baz' will match data['foo'] == 'bar:baz' and
+    data['foo']['bar'] == 'baz'. The latter would take priority over the
+    former, as more deeply-nested matches are tried first.
+    """
+
+    def _match(target, pattern):
+        target = str(target).lower()
+        pattern = str(pattern).lower()
+
+        if regex_match:
+            try:
+                return re.match(pattern, target)
+            except Exception:  # pylint: disable=broad-except
+                log.error("Invalid regex '%s' in match", pattern)
+                return False
+        else:
+            return (
+                target == pattern if exact_match else fnmatch.fnmatch(target, pattern)
+            )
+
+    def _dict_match(target, pattern):
+        ret = False
+        wildcard = pattern.startswith("*:")
+        if wildcard:
+            pattern = pattern[2:]
+
+        if pattern == "*":
+            # We are just checking that the key exists
+            ret = True
+        if not ret and pattern in target:
+            # We might want to search for a key
+            ret = True
+        if not ret and subdict_match(
+            target, pattern, regex_match=regex_match, exact_match=exact_match
+        ):
+            ret = True
+        if not ret and wildcard:
+            for key in target:
+                if isinstance(target[key], dict):
+                    if _dict_match(target[key], pattern,):
+                        return True
+                elif isinstance(target[key], list):
+                    for item in target[key]:
+                        if _match(item, pattern,):
+                            return True
+                elif _match(target[key], pattern,):
+                    return True
+        return ret
+
+    splits = expr.split(delimiter)
+    num_splits = len(splits)
+    if num_splits == 1:
+        # Delimiter not present, this can't possibly be a match
+        return False
+
+    # If we have 4 splits, then we have three delimiters. Thus, the indexes we
+    # want to use are 3, 2, and 1, in that order.
+    for idx in range(num_splits - 1, 0, -1):
+        key = delimiter.join(splits[:idx])
+        if key == "*":
+            # We are matching on everything under the top level, so we need to
+            # treat the match as the entire data being passed in
+            matchstr = expr
+            match = data
+        else:
+            matchstr = delimiter.join(splits[idx:])
+            match = traverse_dict_and_list(data, key, {}, delimiter=delimiter)
+        log.debug(
+            "Attempting to match '%s' in '%s' using delimiter '%s'",
+            matchstr,
+            key,
+            delimiter,
+        )
+        if match == {}:
+            continue
+        if isinstance(match, dict):
+            if _dict_match(match, matchstr):
+                return True
+            continue
+        if isinstance(match, (list, tuple)):
+            # We are matching a single component to a single list member
+            for member in match:
+                if isinstance(member, dict):
+                    if _dict_match(member, matchstr,):
+                        return True
+                if _match(member, matchstr):
+                    return True
+            continue
+        if _match(match, matchstr):
+            return True
+    return False
+
+
+def to_lowercase(data, preserve_dict_class=False):
+    """
+    Recursively changes everything in data to lowercase.
+    """
+    return __change_case(data, "lower", preserve_dict_class)
+
+
+def to_uppercase(data, preserve_dict_class=False):
+    """
+    Recursively changes everything in data to uppercase.
+    """
+    return __change_case(data, "upper", preserve_dict_class)
+
+
+def traverse_dict(
+    data: Dict, key: str, default: Any = None, delimiter: str = DEFAULT_TARGET_DELIM
+):
+    """
+    Traverse a dict using a colon-delimited (or otherwise delimited, using the
+    'delimiter' param) target string. The target 'foo:bar:baz' will return
+    data['foo']['bar']['baz'] if this value exists, and will otherwise return
+    the dict in the default argument.
+    """
+    ptr = data
+    try:
+        for each in key.split(delimiter):
+            ptr = ptr[each]
+    except (KeyError, IndexError, TypeError):
+        # Encountered a non-indexable value in the middle of traversing
+        return default
+    return ptr
+
+
+def traverse_dict_and_list(
+    data: Dict or List,
+    key: Any,
+    default: Any = None,
+    delimiter: str = DEFAULT_TARGET_DELIM,
+):
+    """
+    Traverse a dict or list using a colon-delimited (or otherwise delimited,
+    using the 'delimiter' param) target string. The target 'foo:bar:0' will
+    return data['foo']['bar'][0] if this value exists, and will otherwise
+    return the dict in the default argument.
+    Function will automatically determine the target type.
+    The target 'foo:bar:0' will return data['foo']['bar'][0] if data like
+    {'foo':{'bar':['baz']}} , if data like {'foo':{'bar':{'0':'baz'}}}
+    then return data['foo']['bar']['0']
+    """
+    ptr = data
+    for each in key.split(delimiter):
+        if isinstance(ptr, list):
+            try:
+                idx = int(each)
+            except ValueError:
+                embed_match = False
+                # Index was not numeric, lets look at any embedded dicts
+                for embedded in (x for x in ptr if isinstance(x, dict)):
+                    try:
+                        ptr = embedded[each]
+                        embed_match = True
+                        break
+                    except KeyError:
+                        pass
+                if not embed_match:
+                    # No embedded dicts matched, return the default
+                    return default
+            else:
+                try:
+                    ptr = ptr[idx]
+                except IndexError:
+                    return default
+        else:
+            try:
+                ptr = ptr[each]
+            except KeyError:
+                # YAML-load the current key (catches integer/float dict keys)
+                try:
+                    loaded_key = args.yamlify_arg(each)
+                except Exception:  # pylint: disable=broad-except
+                    return default
+                if loaded_key == each:
+                    # After YAML-loading, the desired key is unchanged. This
+                    # means that the KeyError caught above is a legitimate
+                    # failure to match the desired key. Therefore, return the
+                    # default.
+                    return default
+                else:
+                    # YAML-loading the key changed its value, so re-check with
+                    # the loaded key. This is how we can match a numeric key
+                    # with a string-based expression.
+                    try:
+                        ptr = ptr[loaded_key]
+                    except (KeyError, TypeError):
+                        return default
+            except TypeError:
+                return default
+    return ptr
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/differ.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/differ.py
new file mode 100644
index 0000000..46f11c4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/differ.py
@@ -0,0 +1,415 @@
+# -*- coding: utf-8 -*-
+"""
+ Calculate the difference between two dictionaries as:
+    (1) items added
+    (2) items removed
+    (3) keys same in both but changed values
+    (4) keys same in both and unchanged values
+
+  Originally posted at http://stackoverflow.com/questions/1165352/fast-comparison-between-two-python-dictionary/1165552#1165552
+  Available at repository: https://github.com/hughdbrown/dictdiffer
+
+  Added the ability to recursively compare dictionaries
+"""
+import copy
+from collections import Mapping
+from typing import Any, Dict, List, Text, Set
+
+
+def diff(current_dict, past_dict):
+    return DictDiffer(current_dict, past_dict)
+
+
+class DictDiffer:
+    """
+    Calculate the difference between two dictionaries as:
+    (1) items added
+    (2) items removed
+    (3) keys same in both but changed values
+    (4) keys same in both and unchanged values
+    """
+
+    def __init__(self, current_dict: Dict, past_dict: Dict):
+        self.current_dict, self.past_dict = current_dict, past_dict
+        self.set_current, self.set_past = set(list(current_dict)), set(list(past_dict))
+        self.intersect = self.set_current.intersection(self.set_past)
+
+    def added(self) -> Set:
+        return self.set_current - self.intersect
+
+    def removed(self) -> Set:
+        return self.set_past - self.intersect
+
+    def changed(self) -> Set:
+        return set(
+            o for o in self.intersect if self.past_dict[o] != self.current_dict[o]
+        )
+
+    def unchanged(self) -> Set:
+        return set(
+            o for o in self.intersect if self.past_dict[o] == self.current_dict[o]
+        )
+
+
+class RecursiveDictDiffer(DictDiffer):
+    """
+    Calculates a recursive diff between the current_dict and the past_dict
+    creating a diff in the format
+
+    {'new': new_value, 'old': old_value}
+
+    It recursively searches differences in common keys whose values are
+    dictionaries creating a diff dict in the format
+
+    {'common_key' : {'new': new_value, 'old': old_value}
+
+    The class overrides all DictDiffer methods, returning lists of keys and
+    subkeys using the . notation (i.e 'common_key1.common_key2.changed_key')
+
+    The class provides access to:
+        (1) the added, removed, changes keys and subkeys (using the . notation)
+               ``added``, ``removed``, ``changed`` methods
+        (2) the diffs in the format aboce (diff property)
+                ``diffs`` property
+        (3) a dict with the new changed values only (new_values property)
+                ``new_values`` property
+        (4) a dict with the old changed values only (old_values property)
+                ``old_values`` property
+        (5) a string representation of the changes in the format:
+                ``changes_str`` property
+
+    Note:
+        The <_null_> value is a reserved value
+
+.. code-block:: text
+
+            common_key1:
+              common_key2:
+                changed_key1 from '<old_str>' to '<new_str>'
+                changed_key2 from '[<old_elem1>, ..]' to '[<new_elem1>, ..]'
+            common_key3:
+              changed_key3 from <old_int> to <new_int>
+
+    """
+
+    NONE_VALUE = "<_null_>"
+
+    def __init__(self, past_dict: Dict, current_dict: Dict, ignore_missing_keys: bool):
+        """
+        past_dict
+            Past dictionary.
+
+        current_dict
+            Current dictionary.
+
+        ignore_missing_keys
+            Flag specifying whether to ignore keys that no longer exist in the
+            current_dict, but exist in the past_dict. If true, the diff will
+            not contain the missing keys.
+        """
+        super(RecursiveDictDiffer, self).__init__(current_dict, past_dict)
+        self._diffs = self._get_diffs(
+            self.current_dict, self.past_dict, ignore_missing_keys
+        )
+        # Ignores unet values when assessing the changes
+        self.ignore_unset_values = True
+
+    @classmethod
+    def _get_diffs(cls, dict1, dict2, ignore_missing_keys) -> Dict:
+        """
+        Returns a dict with the differences between dict1 and dict2
+
+        Notes:
+            Keys that only exist in dict2 are not included in the diff if
+            ignore_missing_keys is True, otherwise they are
+            Simple compares are done on lists
+        """
+        ret_dict = {}
+        for p in dict1.keys():
+            if p not in dict2:
+                ret_dict.update({p: {"new": dict1[p], "old": cls.NONE_VALUE}})
+            elif dict1[p] != dict2[p]:
+                if isinstance(dict1[p], dict) and isinstance(dict2[p], dict):
+                    sub_diff_dict = cls._get_diffs(
+                        dict1[p], dict2[p], ignore_missing_keys
+                    )
+                    if sub_diff_dict:
+                        ret_dict.update({p: sub_diff_dict})
+                else:
+                    ret_dict.update({p: {"new": dict1[p], "old": dict2[p]}})
+        if not ignore_missing_keys:
+            for p in dict2.keys():
+                if p not in dict1.keys():
+                    ret_dict.update({p: {"new": cls.NONE_VALUE, "old": dict2[p]}})
+        return ret_dict
+
+    @classmethod
+    def _get_values(cls, diff_dict: Dict, type_: str = "new") -> Dict:
+        """
+        Returns a dictionaries with the 'new' values in a diff dict.
+
+        type_
+            Which values to return, 'new' or 'old'
+        """
+        ret_dict = {}
+        for p in diff_dict.keys():
+            if type_ in diff_dict[p].keys():
+                ret_dict.update({p: diff_dict[p][type_]})
+            else:
+                ret_dict.update({p: cls._get_values(diff_dict[p], type_=type_)})
+        return ret_dict
+
+    @classmethod
+    def _get_changes(cls, diff_dict: Dict) -> Dict:
+        """
+        Returns a list of string message with the differences in a diff dict.
+
+        Each inner difference is tabulated two space deeper
+        """
+        changes_strings = []
+        for p in sorted(diff_dict.keys()):
+            if sorted(diff_dict[p].keys()) == ["new", "old"]:
+                # Some string formatting
+                old_value = diff_dict[p]["old"]
+                if diff_dict[p]["old"] == cls.NONE_VALUE:
+                    old_value = "nothing"
+                elif isinstance(diff_dict[p]["old"], Text):
+                    old_value = "'{0}'".format(diff_dict[p]["old"])
+                elif isinstance(diff_dict[p]["old"], list):
+                    old_value = "'{0}'".format(", ".join(diff_dict[p]["old"]))
+                new_value = diff_dict[p]["new"]
+                if diff_dict[p]["new"] == cls.NONE_VALUE:
+                    new_value = "nothing"
+                elif isinstance(diff_dict[p]["new"], Text):
+                    new_value = "'{0}'".format(diff_dict[p]["new"])
+                elif isinstance(diff_dict[p]["new"], list):
+                    new_value = "'{0}'".format(", ".join(diff_dict[p]["new"]))
+                changes_strings.append(
+                    "{0} from {1} to {2}".format(p, old_value, new_value)
+                )
+            else:
+                sub_changes = cls._get_changes(diff_dict[p])
+                if sub_changes:
+                    changes_strings.append("{0}:".format(p))
+                    changes_strings.extend(["  {0}".format(c) for c in sub_changes])
+        return changes_strings
+
+    def added(self) -> Set[str]:
+        """
+        Returns all keys that have been added.
+
+        If the keys are in child dictionaries they will be represented with
+        . notation
+        """
+
+        def _added(diffs, prefix):
+            keys = []
+            for key in diffs.keys():
+                if isinstance(diffs[key], dict) and "old" not in diffs[key]:
+                    keys.extend(
+                        _added(diffs[key], prefix="{0}{1}.".format(prefix, key))
+                    )
+                elif diffs[key]["old"] == self.NONE_VALUE:
+                    if isinstance(diffs[key]["new"], dict):
+                        keys.extend(
+                            _added(
+                                diffs[key]["new"], prefix="{0}{1}.".format(prefix, key)
+                            )
+                        )
+                    else:
+                        keys.append("{0}{1}".format(prefix, key))
+            return keys
+
+        return sorted(_added(self._diffs, prefix=""))
+
+    def removed(self) -> Set[str]:
+        """
+        Returns all keys that have been removed.
+
+        If the keys are in child dictionaries they will be represented with
+        . notation
+        """
+
+        def _removed(diffs, prefix):
+            keys = []
+            for key in diffs.keys():
+                if isinstance(diffs[key], dict) and "old" not in diffs[key]:
+                    keys.extend(
+                        _removed(diffs[key], prefix="{0}{1}.".format(prefix, key))
+                    )
+                elif diffs[key]["new"] == self.NONE_VALUE:
+                    keys.append("{0}{1}".format(prefix, key))
+                elif isinstance(diffs[key]["new"], dict):
+                    keys.extend(
+                        _removed(
+                            diffs[key]["new"], prefix="{0}{1}.".format(prefix, key)
+                        )
+                    )
+            return keys
+
+        return sorted(_removed(self._diffs, prefix=""))
+
+    def changed(self) -> Set[str]:
+        """
+        Returns all keys that have been changed.
+
+        If the keys are in child dictionaries they will be represented with
+        . notation
+        """
+
+        def _changed(diffs, prefix):
+            keys = []
+            for key in diffs.keys():
+                if not isinstance(diffs[key], dict):
+                    continue
+
+                if isinstance(diffs[key], dict) and "old" not in diffs[key]:
+                    keys.extend(
+                        _changed(diffs[key], prefix="{0}{1}.".format(prefix, key))
+                    )
+                    continue
+                if self.ignore_unset_values:
+                    if (
+                        "old" in diffs[key]
+                        and "new" in diffs[key]
+                        and diffs[key]["old"] != self.NONE_VALUE
+                        and diffs[key]["new"] != self.NONE_VALUE
+                    ):
+                        if isinstance(diffs[key]["new"], dict):
+                            keys.extend(
+                                _changed(
+                                    diffs[key]["new"],
+                                    prefix="{0}{1}.".format(prefix, key),
+                                )
+                            )
+                        else:
+                            keys.append("{0}{1}".format(prefix, key))
+                    elif isinstance(diffs[key], dict):
+                        keys.extend(
+                            _changed(diffs[key], prefix="{0}{1}.".format(prefix, key))
+                        )
+                else:
+                    if "old" in diffs[key] and "new" in diffs[key]:
+                        if isinstance(diffs[key]["new"], dict):
+                            keys.extend(
+                                _changed(
+                                    diffs[key]["new"],
+                                    prefix="{0}{1}.".format(prefix, key),
+                                )
+                            )
+                        else:
+                            keys.append("{0}{1}".format(prefix, key))
+                    elif isinstance(diffs[key], dict):
+                        keys.extend(
+                            _changed(diffs[key], prefix="{0}{1}.".format(prefix, key))
+                        )
+
+            return keys
+
+        return sorted(_changed(self._diffs, prefix=""))
+
+    def unchanged(self) -> Set[str]:
+        """
+        Returns all keys that have been unchanged.
+
+        If the keys are in child dictionaries they will be represented with
+        . notation
+        """
+
+        def _unchanged(current_dict, diffs, prefix):
+            keys = []
+            for key in current_dict.keys():
+                if key not in diffs:
+                    keys.append("{0}{1}".format(prefix, key))
+                elif isinstance(current_dict[key], dict):
+                    if "new" in diffs[key]:
+                        # There is a diff
+                        continue
+                    else:
+                        keys.extend(
+                            _unchanged(
+                                current_dict[key],
+                                diffs[key],
+                                prefix="{0}{1}.".format(prefix, key),
+                            )
+                        )
+
+            return keys
+
+        return sorted(_unchanged(self.current_dict, self._diffs, prefix=""))
+
+    @property
+    def diffs(self) -> Dict:
+        """Returns a dict with the recursive diffs current_dict - past_dict"""
+        return self._diffs
+
+    @property
+    def new_values(self) -> Dict:
+        """Returns a dictionary with the new values"""
+        return self._get_values(self._diffs, type_="new")
+
+    @property
+    def old_values(self) -> Dict:
+        """Returns a dictionary with the old values"""
+        return self._get_values(self._diffs, type_="old")
+
+    @property
+    def changes_str(self) -> str:
+        """Returns a string describing the changes"""
+        return "\n".join(self._get_changes(self._diffs))
+
+
+def deep_diff(old: Dict, new: Dict, ignore: List = None) -> Dict[str, Any]:
+    ignore = ignore or []
+    res = {}
+    old = copy.deepcopy(old) or {}
+    new = copy.deepcopy(new) or {}
+
+    stack = [(old, new, False)]
+
+    while len(stack) > 0:
+        tmps = []
+        tmp_old, tmp_new, reentrant = stack.pop()
+        for key in set(list(tmp_old) + list(tmp_new)):
+            if key in tmp_old and key in tmp_new and tmp_old[key] == tmp_new[key]:
+                del tmp_old[key]
+                del tmp_new[key]
+                continue
+            if not reentrant:
+                if key in tmp_old and key in ignore:
+                    del tmp_old[key]
+                if key in tmp_new and key in ignore:
+                    del tmp_new[key]
+                if isinstance(tmp_old.get(key), Mapping) and isinstance(
+                    tmp_new.get(key), Mapping
+                ):
+                    tmps.append((tmp_old[key], tmp_new[key], False))
+        if tmps:
+            stack.extend([(tmp_old, tmp_new, True)] + tmps)
+    if old:
+        res["old"] = old
+    if new:
+        res["new"] = new
+    return res
+
+
+def recursive_diff(
+    past_dict: Dict, current_dict: Dict, ignore_missing_keys: bool = True
+) -> RecursiveDictDiffer:
+    """
+    Returns a RecursiveDictDiffer object that computes the recursive diffs
+    between two dictionaries
+
+    past_dict
+            Past dictionary
+
+    current_dict
+        Current dictionary
+
+    ignore_missing_keys
+        Flag specifying whether to ignore keys that no longer exist in the
+        current_dict, but exist in the past_dict. If true, the diff will
+        not contain the missing keys.
+        Default is True.
+    """
+    return RecursiveDictDiffer(past_dict, current_dict, ignore_missing_keys)
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/mysql.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/mysql.py
new file mode 100644
index 0000000..e6b23c0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/mysql.py
@@ -0,0 +1,44 @@
+from typing import Dict, List
+
+
+def to_num(text: str) -> int or float:
+    """
+    Convert a string to a number.
+    Returns an integer if the string represents an integer, a floating
+    point number if the string is a real number, or the string unchanged
+    otherwise.
+    """
+    try:
+        return int(text)
+    except ValueError:
+        try:
+            return float(text)
+        except ValueError:
+            return text
+
+
+def to_dict(data: List[str], key: str) -> Dict:
+    """
+    Convert MySQL-style output to a python dictionary
+    """
+    ret = {}
+    headers = [""]
+    for line in data:
+        if not line:
+            continue
+        if line.startswith("+"):
+            continue
+        comps = line.split("|")
+        for comp in range(len(comps)):
+            comps[comp] = comps[comp].strip()
+        if len(headers) > 1:
+            index = len(headers) - 1
+            row = {}
+            for field in range(index):
+                if field < 1:
+                    continue
+                row[headers[field]] = to_num(comps[field])
+            ret[row[key]] = row
+        else:
+            headers = comps
+    return ret
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/trim.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/trim.py
new file mode 100644
index 0000000..f3e4dab
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/trim.py
@@ -0,0 +1,111 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import, print_function, unicode_literals
+
+from typing import Any, Dict
+
+import msgpack
+import sys
+
+
+def _trim_dict_in_dict(data: Dict, max_val_size: int, replace_with: Any):
+    """
+    Takes a dictionary, max_val_size and replace_with
+    and recursively loops through and replaces any values
+    that are greater than max_val_size.
+    """
+    for key in data:
+        if isinstance(data[key], dict):
+            _trim_dict_in_dict(data[key], max_val_size, replace_with)
+        else:
+            if sys.getsizeof(data[key]) > max_val_size:
+                data[key] = replace_with
+
+
+def trim_dict(
+    data: Any,
+    max_dict_bytes: int,
+    percent: float = 50.0,
+    stepper_size: int = 10,
+    replace_with: str = "VALUE_TRIMMED",
+    is_msgpacked: bool = False,
+    use_bin_type: bool = False,
+):
+    """
+    Takes a dictionary and iterates over its keys, looking for
+    large values and replacing them with a trimmed string.
+
+    If after the first pass over dictionary keys, the dictionary
+    is not sufficiently small, the stepper_size will be increased
+    and the dictionary will be rescanned. This allows for progressive
+    scanning, removing large items first and only making additional
+    passes for smaller items if necessary.
+
+    This function uses msgpack to calculate the size of the dictionary
+    in question. While this might seem like unnecessary overhead, a
+    data structure in python must be serialized in order for sys.getsizeof()
+    to accurately return the items referenced in the structure.
+
+    Ex:
+    >>> dict_tools.trim.trim_dict({'a': 'b', 'c': 'x' * 10000}, 100)
+    {'a': 'b', 'c': 'VALUE_TRIMMED'}
+
+    To improve performance, it is adviseable to pass in msgpacked
+    data structures instead of raw dictionaries. If a msgpack
+    structure is passed in, it will not be unserialized unless
+    necessary.
+
+    If a msgpack is passed in, it will be repacked if necessary
+    before being returned.
+
+    :param use_bin_type: Set this to true if "is_msgpacked=True"
+                         and the msgpack data has been encoded
+                         with "use_bin_type=True". This also means
+                         that the msgpack data should be decoded with
+                         "encoding='utf-8'".
+    """
+    if is_msgpacked:
+        dict_size = sys.getsizeof(data)
+    else:
+        dict_size = sys.getsizeof(msgpack.dumps(data))
+    if dict_size > max_dict_bytes:
+        if is_msgpacked:
+            if use_bin_type:
+                data = msgpack.loads(data, encoding="utf-8")
+            else:
+                data = msgpack.loads(data)
+        while True:
+            percent = float(percent)
+            max_val_size = float(max_dict_bytes * (percent / 100))
+            try:
+                for key in data:
+                    if isinstance(data[key], dict):
+                        _trim_dict_in_dict(data[key], max_val_size, replace_with)
+                    else:
+                        if sys.getsizeof(data[key]) > max_val_size:
+                            data[key] = replace_with
+                percent = percent - stepper_size
+                max_val_size = float(max_dict_bytes * (percent / 100))
+                if use_bin_type:
+                    dump_data = msgpack.dumps(data, use_bin_type=True)
+                else:
+                    dump_data = msgpack.dumps(data)
+                cur_dict_size = sys.getsizeof(dump_data)
+                if cur_dict_size < max_dict_bytes:
+                    if is_msgpacked:  # Repack it
+                        return dump_data
+                    else:
+                        return data
+                elif max_val_size == 0:
+                    if is_msgpacked:
+                        return dump_data
+                    else:
+                        return data
+            except ValueError:
+                pass
+    if is_msgpacked:
+        if use_bin_type:
+            return msgpack.dumps(data, use_bin_type=True)
+        else:
+            return msgpack.dumps(data)
+    else:
+        return data
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/update.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/update.py
new file mode 100644
index 0000000..8f01cf1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/update.py
@@ -0,0 +1,269 @@
+# -*- coding: utf-8 -*-
+"""
+Alex Martelli's solution for recursive dict update from
+http://stackoverflow.com/a/3233356
+"""
+
+# Import 3rd-party libs
+from . import data, yamlex, DEFAULT_TARGET_DELIM
+
+import copy
+import logging
+from collections.abc import Mapping
+
+# Default delimiter for multi-level traversal in targeting
+from typing import Dict, Any, Tuple
+
+log = logging.getLogger(__name__)
+
+
+def update(
+    dest: Dict, upd: Dict, recursive_update: bool = True, merge_lists: bool = False
+) -> Dict:
+    """
+    Recursive version of the default dict.update
+
+    Merges upd recursively into dest
+
+    If recursive_update=False, will use the classic dict.update, or fall back
+    on a manual merge (helpful for non-dict types like FunctionWrapper)
+
+    If merge_lists=True, will aggregate list object types instead of replace.
+    The list in ``upd`` is added to the list in ``dest``, so the resulting list
+    is ``dest[key] + upd[key]``. This behavior is only activated when
+    recursive_update=True. By default merge_lists=False.
+
+    .. versionchanged: 2016.11.6
+        When merging lists, duplicate values are removed. Values already
+        present in the ``dest`` list are not added from the ``upd`` list.
+    """
+    if (not isinstance(dest, Mapping)) or (not isinstance(upd, Mapping)):
+        raise TypeError("Cannot update using non-dict types in dictupdate.update()")
+    updkeys = list(upd.keys())
+    if not set(list(dest.keys())) & set(updkeys):
+        recursive_update = False
+    if recursive_update:
+        for key in updkeys:
+            val = upd[key]
+            try:
+                dest_subkey = dest.get(key, None)
+            except AttributeError:
+                dest_subkey = None
+            if isinstance(dest_subkey, Mapping) and isinstance(val, Mapping):
+                ret = update(dest_subkey, val, merge_lists=merge_lists)
+                dest[key] = ret
+            elif isinstance(dest_subkey, list) and isinstance(val, list):
+                if merge_lists:
+                    merged = copy.deepcopy(dest_subkey)
+                    merged.extend([x for x in val if x not in merged])
+                    dest[key] = merged
+                else:
+                    dest[key] = upd[key]
+            else:
+                dest[key] = upd[key]
+        return dest
+    try:
+        for k in upd:
+            dest[k] = upd[k]
+    except AttributeError:
+        # this mapping is not a dict
+        for k in upd:
+            dest[k] = upd[k]
+    return dest
+
+
+def merge_list(obj_a: Dict, obj_b: Dict) -> Dict:
+    ret = {}
+    for key, val in obj_a.items():
+        if key in obj_b:
+            ret[key] = [val, obj_b[key]]
+        else:
+            ret[key] = val
+    return ret
+
+
+def merge_recurse(obj_a: Dict, obj_b: Dict, merge_lists: bool = False) -> Dict:
+    copied = copy.deepcopy(obj_a)
+    return update(copied, obj_b, merge_lists=merge_lists)
+
+
+def merge_aggregate(obj_a, obj_b):
+    return yamlex.merge_recursive(obj_a, obj_b, level=1)
+
+
+def merge_overwrite(obj_a, obj_b, merge_lists: bool = False):
+    for obj in obj_b:
+        if obj in obj_a:
+            obj_a[obj] = obj_b[obj]
+    return merge_recurse(obj_a, obj_b, merge_lists=merge_lists)
+
+
+def merge(
+    obj_a,
+    obj_b,
+    strategy: str = "smart",
+    renderer: str = "yaml",
+    merge_lists: bool = False,
+):
+    if strategy == "smart":
+        if renderer.split("|")[-1] == "yamlex" or renderer.startswith("yamlex_"):
+            strategy = "aggregate"
+        else:
+            strategy = "recurse"
+
+    if strategy == "list":
+        merged = merge_list(obj_a, obj_b)
+    elif strategy == "recurse":
+        merged = merge_recurse(obj_a, obj_b, merge_lists)
+    elif strategy == "aggregate":
+        #: level = 1 merge at least root data
+        merged = merge_aggregate(obj_a, obj_b)
+    elif strategy == "overwrite":
+        merged = merge_overwrite(obj_a, obj_b, merge_lists)
+    elif strategy == "none":
+        # If we do not want to merge, there is only one pillar passed, so we can safely use the default recurse,
+        # we just do not want to log an error
+        merged = merge_recurse(obj_a, obj_b)
+    else:
+        log.warning("Unknown merging strategy '%s', fallback to recurse", strategy)
+        merged = merge_recurse(obj_a, obj_b)
+
+    return merged
+
+
+def ensure_dict_key(
+    in_dict: Dict, keys: str, delimiter: str = DEFAULT_TARGET_DELIM
+) -> Dict:
+    """
+    Ensures that in_dict contains the series of recursive keys defined in keys.
+
+    :param dict in_dict: The dict to work with.
+    :param str keys: The delimited string with one or more keys.
+    :param str delimiter: The delimiter to use in `keys`. Defaults to ':'.
+    :rtype: dict
+    :return: Returns the modified in-place `in_dict`.
+    """
+    if delimiter in keys:
+        a_keys = keys.split(delimiter)
+    else:
+        a_keys = [keys]
+    dict_pointer = in_dict
+    while a_keys:
+        current_key = a_keys.pop(0)
+        if current_key not in dict_pointer or not isinstance(
+            dict_pointer[current_key], dict
+        ):
+            dict_pointer[current_key] = {}
+        dict_pointer = dict_pointer[current_key]
+    return in_dict
+
+
+def _dict_rpartition(
+    in_dict: Dict, keys: str, delimiter: str = DEFAULT_TARGET_DELIM
+) -> Tuple[Dict, str]:
+    """
+    Helper function to:
+    - Ensure all but the last key in `keys` exist recursively in `in_dict`.
+    - Return the dict at the one-to-last key, and the last key
+
+    :param dict in_dict: The dict to work with.
+    :param str keys: The delimited string with one or more keys.
+    :param str delimiter: The delimiter to use in `keys`. Defaults to ':'.
+    :rtype: tuple(dict, str)
+    :return: (The dict at the one-to-last key, the last key)
+    """
+    if delimiter in keys:
+        all_but_last_keys, _, last_key = keys.rpartition(delimiter)
+        ensure_dict_key(in_dict, all_but_last_keys, delimiter=delimiter)
+        dict_pointer = data.traverse_dict(
+            in_dict, all_but_last_keys, default=None, delimiter=delimiter
+        )
+    else:
+        dict_pointer = in_dict
+        last_key = keys
+    return dict_pointer, last_key
+
+
+def set_dict_key_value(
+    in_dict: Dict, keys: str, value: Any, delimiter: str = DEFAULT_TARGET_DELIM
+) -> Dict:
+    """
+    Ensures that in_dict contains the series of recursive keys defined in keys.
+    Also sets whatever is at the end of `in_dict` traversed with `keys` to `value`.
+
+    :param dict in_dict: The dictionary to work with
+    :param str keys: The delimited string with one or more keys.
+    :param any value: The value to assign to the nested dict-key.
+    :param str delimiter: The delimiter to use in `keys`. Defaults to ':'.
+    :rtype: dict
+    :return: Returns the modified in-place `in_dict`.
+    """
+    dict_pointer, last_key = _dict_rpartition(in_dict, keys, delimiter=delimiter)
+    dict_pointer[last_key] = value
+    return in_dict
+
+
+def update_dict_key_value(
+    in_dict: Dict, keys: str, value: Any, delimiter: str = DEFAULT_TARGET_DELIM
+) -> Dict:
+    """
+    Ensures that in_dict contains the series of recursive keys defined in keys.
+    Also updates the dict, that is at the end of `in_dict` traversed with `keys`,
+    with `value`.
+
+    :param dict in_dict: The dictionary to work with
+    :param str keys: The delimited string with one or more keys.
+    :param any value: The value to update the nested dict-key with.
+    :param str delimiter: The delimiter to use in `keys`. Defaults to ':'.
+    :rtype: dict
+    :return: Returns the modified in-place `in_dict`.
+    """
+    dict_pointer, last_key = _dict_rpartition(in_dict, keys, delimiter=delimiter)
+    if last_key not in dict_pointer or dict_pointer[last_key] is None:
+        dict_pointer[last_key] = {}
+    dict_pointer[last_key].update(value)
+    return in_dict
+
+
+def append_dict_key_value(
+    in_dict: Dict, keys: str, value: Any, delimiter: str = DEFAULT_TARGET_DELIM
+) -> Dict:
+    """
+    Ensures that in_dict contains the series of recursive keys defined in keys.
+    Also appends `value` to the list that is at the end of `in_dict` traversed
+    with `keys`.
+
+    :param dict in_dict: The dictionary to work with
+    :param str keys: The delimited string with one or more keys.
+    :param any value: The value to append to the nested dict-key.
+    :param str delimiter: The delimiter to use in `keys`. Defaults to ':'.
+    :rtype: dict
+    :return: Returns the modified in-place `in_dict`.
+    """
+    dict_pointer, last_key = _dict_rpartition(in_dict, keys, delimiter=delimiter)
+    if last_key not in dict_pointer or dict_pointer[last_key] is None:
+        dict_pointer[last_key] = []
+    dict_pointer[last_key].append(value)
+    return in_dict
+
+
+def extend_dict_key_value(
+    in_dict: Dict, keys: str, value: Any, delimiter: str = DEFAULT_TARGET_DELIM
+) -> Dict:
+    """
+    Ensures that in_dict contains the series of recursive keys defined in keys.
+    Also extends the list, that is at the end of `in_dict` traversed with `keys`,
+    with `value`.
+
+    :param dict in_dict: The dictionary to work with
+    :param str keys: The delimited string with one or more keys.
+    :param any value: The value to extend the nested dict-key with.
+    :param str delimiter: The delimiter to use in `keys`. Defaults to ':'.
+    :rtype: dict
+    :return: Returns the modified in-place `in_dict`.
+    """
+    dict_pointer, last_key = _dict_rpartition(in_dict, keys, delimiter=delimiter)
+    if last_key not in dict_pointer or dict_pointer[last_key] is None:
+        dict_pointer[last_key] = []
+    dict_pointer[last_key].extend(value)
+    return in_dict
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/utils.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/utils.py
new file mode 100644
index 0000000..25aaacb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/utils.py
@@ -0,0 +1,22 @@
+from typing import ByteString, Dict, Iterable, Mapping, Text
+
+
+def decode_dict(data: Dict[bytes, bytes]) -> Dict[str, str]:
+    """
+    Recursively decode all byte-strings found in a dictionary
+    """
+    ret = {}
+    for key, value in data.items():
+        if isinstance(key, ByteString):
+            key = key.decode()
+        if isinstance(value, (Mapping, Dict)):
+            ret[key] = decode_dict(value)
+        elif isinstance(value, ByteString):
+            ret[key] = value.decode()
+        elif isinstance(value, Iterable) and not isinstance(value, Text):
+            ret[key] = value.__new__(
+                x.decode() if isinstance(x, ByteString) else x for x in value
+            )
+        else:
+            ret[key] = value
+    return ret
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/xml.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/xml.py
new file mode 100644
index 0000000..efe9afb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/xml.py
@@ -0,0 +1,100 @@
+# -*- coding: utf-8 -*-
+"""
+Various XML utilities
+"""
+from typing import Dict
+from xml.etree import ElementTree
+
+
+def _conv_name(x: str) -> str:
+    """
+    If this XML tree has an xmlns attribute, then etree will add it
+    to the beginning of the tag, like: "{http://path}tag".
+    """
+    if "}" in x:
+        comps = x.split("}")
+        name = comps[1]
+        return name
+    return x
+
+
+def _to_dict(xmltree: ElementTree) -> Dict:
+    """
+    Converts an XML ElementTree to a dictionary that only contains items.
+    This is the default behavior in version 2017.7. This will default to prevent
+    unexpected parsing issues on modules dependent on this.
+    """
+    # If this object has no children, the for..loop below will return nothing
+    # for it, so just return a single dict representing it.
+    if not xmltree:
+        name = _conv_name(xmltree.tag)
+        return {name: xmltree.text}
+
+    xmldict = {}
+    for item in xmltree:
+        name = _conv_name(item.tag)
+
+        if name not in xmldict:
+            if item:
+                xmldict[name] = _to_dict(item)
+            else:
+                xmldict[name] = item.text
+        else:
+            # If a tag appears more than once in the same place, convert it to
+            # a list. This may require that the caller watch for such a thing
+            # to happen, and behave accordingly.
+            if not isinstance(xmldict[name], list):
+                xmldict[name] = [xmldict[name]]
+            xmldict[name].append(_to_dict(item))
+    return xmldict
+
+
+def _to_full_dict(xmltree: ElementTree):
+    """
+    Returns the full XML dictionary including attributes.
+    """
+    xmldict = {}
+
+    for attrName, attrValue in xmltree.attrib.items():
+        xmldict[attrName] = attrValue
+
+    if not xmltree:
+        if not xmldict:
+            # If we don't have attributes, we should return the value as a string
+            # ex: <entry>test</entry>
+            return xmltree.text
+        elif xmltree.text:
+            # XML allows for empty sets with attributes, so we need to make sure that capture this.
+            # ex: <entry name="test"/>
+            xmldict[_conv_name(xmltree.tag)] = xmltree.text
+
+    for item in xmltree:
+        name = _conv_name(item.tag)
+
+        if name not in xmldict:
+            xmldict[name] = _to_full_dict(item)
+        else:
+            # If a tag appears more than once in the same place, convert it to
+            # a list. This may require that the caller watch for such a thing
+            # to happen, and behave accordingly.
+            if not isinstance(xmldict[name], list):
+                xmldict[name] = [xmldict[name]]
+
+            xmldict[name].append(_to_full_dict(item))
+
+    return xmldict
+
+
+def to_dict(xmltree: ElementTree, attr: bool = False):
+    """
+    Convert an XML tree into a dict. The tree that is passed in must be an
+    ElementTree object.
+    Args:
+        xmltree: An ElementTree object.
+        attr: If true, attributes will be parsed. If false, they will be ignored.
+
+    """
+    if attr:
+        return _to_full_dict(xmltree)
+    else:
+        return _to_dict(xmltree)
diff --git a/python3-vckonline/lib/python3.8/site-packages/dict_tools/yamlex.py b/python3-vckonline/lib/python3.8/site-packages/dict_tools/yamlex.py
new file mode 100644
index 0000000..aa4b122
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/dict_tools/yamlex.py
@@ -0,0 +1,404 @@
+# -*- coding: utf-8 -*-
+"""
+    YAMLEX is a format that allows for things like sls files to be
+    more intuitive.
+
+    It's an extension of YAML that implements all the salt magic:
+    - it implies omap for any dict like.
+    - it implies that string like data are str, not unicode
+    - ...
+
+    For example, the file `states.sls` has this contents:
+
+    .. code-block:: yaml
+
+        foo:
+          bar: 42
+          baz: [1, 2, 3]
+
+    The file can be parsed into Python like this
+
+    .. code-block:: python
+
+        from salt.serializers import yamlex
+
+        with open('state.sls', 'r') as stream:
+            obj = yamlex.deserialize(stream)
+
+    Check that ``obj`` is an OrderedDict
+
+    .. code-block:: python
+
+        from salt.utils.odict import OrderedDict
+
+        assert isinstance(obj, dict)
+        assert isinstance(obj, OrderedDict)
+
+
+    yamlex `__repr__` and `__str__` objects' methods render YAML understandable
+    string. It means that they are template friendly.
+
+
+    .. code-block:: python
+
+        print '{0}'.format(obj)
+
+    returns:
+
+    ::
+
+        {foo: {bar: 42, baz: [1, 2, 3]}}
+
+    and they are still valid YAML:
+
+    .. code-block:: python
+
+        from salt.serializers import yaml
+        yml_obj = yaml.deserialize(str(obj))
+        assert yml_obj == obj
+
+    yamlex implements also custom tags:
+
+    !aggregate
+
+         this tag allows structures aggregation.
+
+        For example:
+
+
+        .. code-block:: yaml
+
+            placeholder: !aggregate foo
+            placeholder: !aggregate bar
+            placeholder: !aggregate baz
+
+        is rendered as
+
+        .. code-block:: yaml
+
+            placeholder: [foo, bar, baz]
+
+    !reset
+
+         this tag flushes the computing value.
+
+        .. code-block:: yaml
+
+            placeholder: {!aggregate foo: {foo: 42}}
+            placeholder: {!aggregate foo: {bar: null}}
+            !reset placeholder: {!aggregate foo: {baz: inga}}
+
+        is roughly equivalent to
+
+        .. code-block:: yaml
+
+            placeholder: {!aggregate foo: {baz: inga}}
+
+    Document is defacto an aggregate mapping.
+"""
+# pylint: disable=invalid-name,no-member,missing-docstring,no-self-use
+# pylint: disable=too-few-public-methods,too-many-public-methods
+
+# Import python libs
+import collections
+import copy
+import datetime
+import logging
+from typing import TextIO
+
+# Import 3rd-party libs
+import yaml
+from yaml.constructor import ConstructorError
+from yaml.nodes import MappingNode
+
+from .aggregation import Map, Sequence, aggregate
+
+__all__ = ["deserialize", "serialize", "available"]
+
+log = logging.getLogger(__name__)
+
+available = True
+
+# prefer C bindings over python when available
+BaseLoader = getattr(yaml, "CSafeLoader", yaml.SafeLoader)
+# CSafeDumper causes repr errors in python3, so use the pure Python one
+try:
+    # Depending on how PyYAML was built, yaml.SafeDumper may actually be
+    # yaml.cyaml.CSafeDumper (i.e. the C dumper instead of pure Python).
+    BaseDumper = yaml.dumper.SafeDumper
+except AttributeError:
+    # Here just in case, but yaml.dumper.SafeDumper should always exist
+    BaseDumper = yaml.SafeDumper
+
+ERROR_MAP = {
+    ("found character '\\t' " "that cannot start any token"): "Illegal tab character"
+}
+
+
+def deserialize(stream_or_string: str or TextIO, **options):
+    """
+    Deserialize any string of stream like object into a Python data structure.
+
+    :param stream_or_string: stream or string to deserialize.
+    :param options: options given to lower yaml module.
+    """
+
+    options.setdefault("Loader", Loader)
+    return yaml.load(stream_or_string, **options)
+
+
+def serialize(obj, **options):
+    """
+    Serialize Python data to YAML.
+
+    :param obj: the data structure to serialize
+    :param options: options given to lower yaml module.
+    """
+
+    options.setdefault("Dumper", Dumper)
+    options.setdefault("default_flow_style", None)
+    response = yaml.dump(obj, **options)
+    if response.endswith("\n...\n"):
+        return response[:-5]
+    if response.endswith("\n"):
+        return response[:-1]
+    return response
+
+
+class Loader(BaseLoader):  # pylint: disable=W0232
+    """
+    Create a custom YAML loader that uses the custom constructor. This allows
+    for the YAML loading defaults to be manipulated based on needs within salt
+    to make things like sls file more intuitive.
+    """
+
+    DEFAULT_SCALAR_TAG = "tag:yaml.org,2002:str"
+    DEFAULT_SEQUENCE_TAG = "tag:yaml.org,2002:seq"
+    DEFAULT_MAPPING_TAG = "tag:yaml.org,2002:omap"
+
+    def compose_document(self):
+        node = BaseLoader.compose_document(self)
+        node.tag = "!aggregate"
+        return node
+
+    def construct_yaml_omap(self, node):
+        """
+        Build the SLSMap
+        """
+        sls_map = SLSMap()
+        if not isinstance(node, MappingNode):
+            raise ConstructorError(
+                None,
+                None,
+                "expected a mapping node, but found {0}".format(node.id),
+                node.start_mark,
+            )
+
+        self.flatten_mapping(node)
+
+        for key_node, value_node in node.value:
+
+            # !reset instruction applies on document only.
+            # It tells to reset previous decoded value for this present key.
+            reset = key_node.tag == "!reset"
+
+            # even if !aggregate tag apply only to values and not keys
+            # it's a reason to act as a such nazi.
+            if key_node.tag == "!aggregate":
+                log.warning("!aggregate applies on values only, not on keys")
+                value_node.tag = key_node.tag
+                key_node.tag = self.resolve_sls_tag(key_node)[0]
+
+            key = self.construct_object(key_node, deep=False)
+            try:
+                hash(key)
+            except TypeError:
+                err = (
+                    "While constructing a mapping {0} found unacceptable " "key {1}"
+                ).format(node.start_mark, key_node.start_mark)
+                raise ConstructorError(err)
+            value = self.construct_object(value_node, deep=False)
+            if key in sls_map and not reset:
+                value = merge_recursive(sls_map[key], value)
+            sls_map[key] = value
+        return sls_map
+
+    def construct_sls_str(self, node):
+        """
+        Build the SLSString.
+        """
+
+        # Ensure obj is str, not py2 unicode or py3 bytes
+        obj = self.construct_scalar(node)
+        return SLSString(obj)
+
+    def construct_sls_int(self, node):
+        """
+        Verify integers and pass them in correctly is they are declared
+        as octal
+        """
+        if node.value == "0":
+            pass
+        elif node.value.startswith("0") and not node.value.startswith(("0b", "0x")):
+            node.value = node.value.lstrip("0")
+            # If value was all zeros, node.value would have been reduced to
+            # an empty string. Change it to '0'.
+            if node.value == "":
+                node.value = "0"
+        return int(node.value)
+
+    def construct_sls_aggregate(self, node):
+        try:
+            tag, deep = self.resolve_sls_tag(node)
+        except Exception:  # pylint: disable=broad-except
+            raise ConstructorError("unable to build reset")
+
+        node = copy.copy(node)
+        node.tag = tag
+        obj = self.construct_object(node, deep)
+        if obj is None:
+            return AggregatedSequence()
+        elif tag == self.DEFAULT_MAPPING_TAG:
+            return AggregatedMap(obj)
+        elif tag == self.DEFAULT_SEQUENCE_TAG:
+            return AggregatedSequence(obj)
+        return AggregatedSequence([obj])
+
+    def construct_sls_reset(self, node):
+        try:
+            tag, deep = self.resolve_sls_tag(node)
+        except Exception:  # pylint: disable=broad-except
+            raise ConstructorError("unable to build reset")
+
+        node = copy.copy(node)
+        node.tag = tag
+
+        return self.construct_object(node, deep)
+
+    def resolve_sls_tag(self, node):
+        if isinstance(node, yaml.nodes.ScalarNode):
+            # search implicit tag
+            tag = self.resolve(yaml.nodes.ScalarNode, node.value, [True, True])
+            deep = False
+        elif isinstance(node, yaml.nodes.SequenceNode):
+            tag = self.DEFAULT_SEQUENCE_TAG
+            deep = True
+        elif isinstance(node, yaml.nodes.MappingNode):
+            tag = self.DEFAULT_MAPPING_TAG
+            deep = True
+        else:
+            raise ConstructorError("unable to resolve tag")
+        return tag, deep
+
+
+Loader.add_constructor("!aggregate", Loader.construct_sls_aggregate)  # custom type
+Loader.add_constructor("!reset", Loader.construct_sls_reset)  # custom type
+Loader.add_constructor(
+    "tag:yaml.org,2002:omap", Loader.construct_yaml_omap
+)  # our overwrite
+Loader.add_constructor(
+    "tag:yaml.org,2002:str", Loader.construct_sls_str
+)  # our overwrite
+Loader.add_constructor(
+    "tag:yaml.org,2002:int", Loader.construct_sls_int
+)  # our overwrite
+Loader.add_multi_constructor("tag:yaml.org,2002:null", Loader.construct_yaml_null)
+Loader.add_multi_constructor("tag:yaml.org,2002:bool", Loader.construct_yaml_bool)
+Loader.add_multi_constructor("tag:yaml.org,2002:float", Loader.construct_yaml_float)
+Loader.add_multi_constructor("tag:yaml.org,2002:binary", Loader.construct_yaml_binary)
+Loader.add_multi_constructor(
+    "tag:yaml.org,2002:timestamp", Loader.construct_yaml_timestamp
+)
+Loader.add_multi_constructor("tag:yaml.org,2002:pairs", Loader.construct_yaml_pairs)
+Loader.add_multi_constructor("tag:yaml.org,2002:set", Loader.construct_yaml_set)
+Loader.add_multi_constructor("tag:yaml.org,2002:seq", Loader.construct_yaml_seq)
+Loader.add_multi_constructor("tag:yaml.org,2002:map", Loader.construct_yaml_map)
+
+
+class SLSMap(collections.OrderedDict):
+    """
+    Ensures that dict str() and repr() are YAML friendly.
+
+    .. code-block:: python
+
+        >>> mapping = OrderedDict([('a', 'b'), ('c', None)])
+        >>> print mapping
+        OrderedDict([('a', 'b'), ('c', None)])
+
+        >>> sls_map = SLSMap(mapping)
+        >>> print sls_map.__str__()
+        {a: b, c: null}
+
+    """
+
+    def __str__(self):
+        return serialize(self, default_flow_style=True)
+
+    def __repr__(self, _repr_running=None):
+        return serialize(self, default_flow_style=True)
+
+
+class SLSString(str):
+    """
+    Ensures that str str() and repr() are YAML friendly.
+
+    .. code-block:: python
+
+        >>> scalar = str('foo')
+        >>> print 'foo'
+        foo
+
+        >>> sls_scalar = SLSString(scalar)
+        >>> print sls_scalar
+        "foo"
+
+    """
+
+    def __str__(self):
+        return serialize(self, default_style='"')
+
+    def __repr__(self):
+        return serialize(self, default_style='"')
+
+
+class AggregatedMap(SLSMap, Map):
+    pass
+
+
+class AggregatedSequence(Sequence):
+    pass
+
+
+class Dumper(BaseDumper):  # pylint: disable=W0232
+    """
+    sls dumper.
+    """
+
+    def represent_odict(self, data):
+        return self.represent_mapping("tag:yaml.org,2002:map", list(data.items()))
+
+
+Dumper.add_multi_representer(type(None), Dumper.represent_none)
+Dumper.add_multi_representer(bytes, Dumper.represent_binary)
+Dumper.add_multi_representer(str, Dumper.represent_str)
+Dumper.add_multi_representer(bool, Dumper.represent_bool)
+Dumper.add_multi_representer(int, Dumper.represent_int)
+Dumper.add_multi_representer(float, Dumper.represent_float)
+Dumper.add_multi_representer(list, Dumper.represent_list)
+Dumper.add_multi_representer(tuple, Dumper.represent_list)
+Dumper.add_multi_representer(
+    dict, Dumper.represent_odict
+)  # make every dict like obj to be represented as a map
+Dumper.add_multi_representer(set, Dumper.represent_set)
+Dumper.add_multi_representer(datetime.date, Dumper.represent_date)
+Dumper.add_multi_representer(datetime.datetime, Dumper.represent_datetime)
+Dumper.add_multi_representer(None, Dumper.represent_undefined)
+
+
+def merge_recursive(obj_a, obj_b, level: bool or int = False):
+    """
+    Merge obj_b into obj_a.
+    """
+    return aggregate(
+        obj_a, obj_b, level, map_class=AggregatedMap, sequence_class=AggregatedSequence
+    )
diff --git a/python3-vckonline/lib/python3.8/site-packages/easy_install.py b/python3-vckonline/lib/python3.8/site-packages/easy_install.py
new file mode 100644
index 0000000..d87e984
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/easy_install.py
@@ -0,0 +1,5 @@
+"""Run the EasyInstall command"""
+
+if __name__ == '__main__':
+    from setuptools.command.easy_install import main
+    main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/__init__.py b/python3-vckonline/lib/python3.8/site-packages/flask/__init__.py
new file mode 100644
index 0000000..1a487e1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/__init__.py
@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+"""
+    flask
+    ~~~~~
+
+    A microframework based on Werkzeug.  It's extensively documented
+    and follows best practice patterns.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+# utilities we import from Werkzeug and Jinja2 that are unused
+# in the module but are exported as public interface.
+from jinja2 import escape
+from jinja2 import Markup
+from werkzeug.exceptions import abort
+from werkzeug.utils import redirect
+
+from . import json
+from ._compat import json_available
+from .app import Flask
+from .app import Request
+from .app import Response
+from .blueprints import Blueprint
+from .config import Config
+from .ctx import after_this_request
+from .ctx import copy_current_request_context
+from .ctx import has_app_context
+from .ctx import has_request_context
+from .globals import _app_ctx_stack
+from .globals import _request_ctx_stack
+from .globals import current_app
+from .globals import g
+from .globals import request
+from .globals import session
+from .helpers import flash
+from .helpers import get_flashed_messages
+from .helpers import get_template_attribute
+from .helpers import make_response
+from .helpers import safe_join
+from .helpers import send_file
+from .helpers import send_from_directory
+from .helpers import stream_with_context
+from .helpers import url_for
+from .json import jsonify
+from .signals import appcontext_popped
+from .signals import appcontext_pushed
+from .signals import appcontext_tearing_down
+from .signals import before_render_template
+from .signals import got_request_exception
+from .signals import message_flashed
+from .signals import request_finished
+from .signals import request_started
+from .signals import request_tearing_down
+from .signals import signals_available
+from .signals import template_rendered
+from .templating import render_template
+from .templating import render_template_string
+
+__version__ = "1.1.2"
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/__main__.py b/python3-vckonline/lib/python3.8/site-packages/flask/__main__.py
new file mode 100644
index 0000000..f61dbc0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/__main__.py
@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.__main__
+    ~~~~~~~~~~~~~~
+
+    Alias for flask.run for the command line.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+
+if __name__ == "__main__":
+    from .cli import main
+
+    main(as_module=True)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/_compat.py b/python3-vckonline/lib/python3.8/site-packages/flask/_compat.py
new file mode 100644
index 0000000..76c442c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/_compat.py
@@ -0,0 +1,145 @@
+# -*- coding: utf-8 -*-
+"""
+    flask._compat
+    ~~~~~~~~~~~~~
+
+    Some py2/py3 compatibility support based on a stripped down
+    version of six so we don't have to depend on a specific version
+    of it.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+import sys
+
+PY2 = sys.version_info[0] == 2
+_identity = lambda x: x
+
+try:  # Python 2
+    text_type = unicode
+    string_types = (str, unicode)
+    integer_types = (int, long)
+except NameError:  # Python 3
+    text_type = str
+    string_types = (str,)
+    integer_types = (int,)
+
+if not PY2:
+    iterkeys = lambda d: iter(d.keys())
+    itervalues = lambda d: iter(d.values())
+    iteritems = lambda d: iter(d.items())
+
+    from inspect import getfullargspec as getargspec
+    from io import StringIO
+    import collections.abc as collections_abc
+
+    def reraise(tp, value, tb=None):
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+    implements_to_string = _identity
+
+else:
+    iterkeys = lambda d: d.iterkeys()
+    itervalues = lambda d: d.itervalues()
+    iteritems = lambda d: d.iteritems()
+
+    from inspect import getargspec
+    from cStringIO import StringIO
+    import collections as collections_abc
+
+    exec("def reraise(tp, value, tb=None):\n raise tp, value, tb")
+
+    def implements_to_string(cls):
+        cls.__unicode__ = cls.__str__
+        cls.__str__ = lambda x: x.__unicode__().encode("utf-8")
+        return cls
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a
+    # dummy metaclass for one level of class instantiation that replaces
+    # itself with the actual metaclass.
+    class metaclass(type):
+        def __new__(metacls, name, this_bases, d):
+            return meta(name, bases, d)
+
+    return type.__new__(metaclass, "temporary_class", (), {})
+
+
+# Certain versions of pypy have a bug where clearing the exception stack
+# breaks the __exit__ function in a very peculiar way.  The second level of
+# exception blocks is necessary because pypy seems to forget to check if an
+# exception happened until the next bytecode instruction?
+#
+# Relevant PyPy bugfix commit:
+# https://bitbucket.org/pypy/pypy/commits/77ecf91c635a287e88e60d8ddb0f4e9df4003301
+# According to ronan on #pypy IRC, it is released in PyPy2 2.3 and later
+# versions.
+#
+# Ubuntu 14.04 has PyPy 2.2.1, which does exhibit this bug.
+BROKEN_PYPY_CTXMGR_EXIT = False
+if hasattr(sys, "pypy_version_info"):
+
+    class _Mgr(object):
+        def __enter__(self):
+            return self
+
+        def __exit__(self, *args):
+            if hasattr(sys, "exc_clear"):
+                # Python 3 (PyPy3) doesn't have exc_clear
+                sys.exc_clear()
+
+    try:
+        try:
+            with _Mgr():
+                raise AssertionError()
+        except:  # noqa: B001
+            # We intentionally use a bare except here. See the comment above
+            # regarding a pypy bug as to why.
+            raise
+    except TypeError:
+        BROKEN_PYPY_CTXMGR_EXIT = True
+    except AssertionError:
+        pass
+
+
+try:
+    from os import fspath
+except ImportError:
+    # Backwards compatibility as proposed in PEP 0519:
+    # https://www.python.org/dev/peps/pep-0519/#backwards-compatibility
+    def fspath(path):
+        return path.__fspath__() if hasattr(path, "__fspath__") else path
+
+
+class _DeprecatedBool(object):
+    def __init__(self, name, version, value):
+        self.message = "'{}' is deprecated and will be removed in version {}.".format(
+            name, version
+        )
+        self.value = value
+
+    def _warn(self):
+        import warnings
+
+        warnings.warn(self.message, DeprecationWarning, stacklevel=2)
+
+    def __eq__(self, other):
+        self._warn()
+        return other == self.value
+
+    def __ne__(self, other):
+        self._warn()
+        return other != self.value
+
+    def __bool__(self):
+        self._warn()
+        return self.value
+
+    __nonzero__ = __bool__
+
+
+json_available = _DeprecatedBool("flask.json_available", "2.0.0", True)
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/app.py b/python3-vckonline/lib/python3.8/site-packages/flask/app.py
new file mode 100644
index 0000000..e385899
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/app.py
@@ -0,0 +1,2467 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.app
+    ~~~~~~~~~
+
+    This module implements the central WSGI application object.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+import os
+import sys
+import warnings
+from datetime import timedelta
+from functools import update_wrapper
+from itertools import chain
+from threading import Lock
+
+from werkzeug.datastructures import Headers
+from werkzeug.datastructures import ImmutableDict
+from werkzeug.exceptions import BadRequest
+from werkzeug.exceptions import BadRequestKeyError
+from werkzeug.exceptions import default_exceptions
+from werkzeug.exceptions import HTTPException
+from werkzeug.exceptions import InternalServerError
+from werkzeug.exceptions import MethodNotAllowed
+from werkzeug.routing import BuildError
+from werkzeug.routing import Map
+from werkzeug.routing import RequestRedirect
+from werkzeug.routing import RoutingException
+from werkzeug.routing import Rule
+from werkzeug.wrappers import BaseResponse
+
+from . import cli
+from . import json
+from ._compat import integer_types
+from ._compat import reraise
+from ._compat import string_types
+from ._compat import text_type
+from .config import Config
+from .config import ConfigAttribute
+from .ctx import _AppCtxGlobals
+from .ctx import AppContext
+from .ctx import RequestContext
+from .globals import _request_ctx_stack
+from .globals import g
+from .globals import request
+from .globals import session
+from .helpers import _endpoint_from_view_func
+from .helpers import _PackageBoundObject
+from .helpers import find_package
+from .helpers import get_debug_flag
+from .helpers import get_env
+from .helpers import get_flashed_messages
+from .helpers import get_load_dotenv
+from .helpers import locked_cached_property
+from .helpers import url_for
+from .json import jsonify
+from .logging import create_logger
+from .sessions import SecureCookieSessionInterface
+from .signals import appcontext_tearing_down
+from .signals import got_request_exception
+from .signals import request_finished
+from .signals import request_started
+from .signals import request_tearing_down
+from .templating import _default_template_ctx_processor
+from .templating import DispatchingJinjaLoader
+from .templating import Environment
+from .wrappers import Request
+from .wrappers import Response
+
+# a singleton sentinel value for parameter defaults
+_sentinel = object()
+
+
+def _make_timedelta(value):
+    if not isinstance(value, timedelta):
+        return timedelta(seconds=value)
+    return value
+
+
+def setupmethod(f):
+    """Wraps a method so that it performs a check in debug mode if the
+    first request was already handled.
+    """
+
+    def wrapper_func(self, *args, **kwargs):
+        if self.debug and self._got_first_request:
+            raise AssertionError(
+                "A setup function was called after the "
+                "first request was handled.  This usually indicates a bug "
+                "in the application where a module was not imported "
+                "and decorators or other functionality was called too late.\n"
+                "To fix this make sure to import all your view modules, "
+                "database models and everything related at a central place "
+                "before the application starts serving requests."
+            )
+        return f(self, *args, **kwargs)
+
+    return update_wrapper(wrapper_func, f)
+
+
+class Flask(_PackageBoundObject):
+    """The flask object implements a WSGI application and acts as the central
+    object.  It is passed the name of the module or package of the
+    application.  Once it is created it will act as a central registry for
+    the view functions, the URL rules, template configuration and much more.
+
+    The name of the package is used to resolve resources from inside the
+    package or the folder the module is contained in depending on if the
+    package parameter resolves to an actual python package (a folder with
+    an :file:`__init__.py` file inside) or a standard module (just a ``.py`` file).
+
+    For more information about resource loading, see :func:`open_resource`.
+
+    Usually you create a :class:`Flask` instance in your main module or
+    in the :file:`__init__.py` file of your package like this::
+
+        from flask import Flask
+        app = Flask(__name__)
+
+    .. admonition:: About the First Parameter
+
+        The idea of the first parameter is to give Flask an idea of what
+        belongs to your application.  This name is used to find resources
+        on the filesystem, can be used by extensions to improve debugging
+        information and a lot more.
+
+        So it's important what you provide there.  If you are using a single
+        module, `__name__` is always the correct value.  If you however are
+        using a package, it's usually recommended to hardcode the name of
+        your package there.
+
+        For example if your application is defined in :file:`yourapplication/app.py`
+        you should create it with one of the two versions below::
+
+            app = Flask('yourapplication')
+            app = Flask(__name__.split('.')[0])
+
+        Why is that?  The application will work even with `__name__`, thanks
+        to how resources are looked up.  However it will make debugging more
+        painful.  Certain extensions can make assumptions based on the
+        import name of your application.  For example the Flask-SQLAlchemy
+        extension will look for the code in your application that triggered
+        an SQL query in debug mode.  If the import name is not properly set
+        up, that debugging information is lost.  (For example it would only
+        pick up SQL queries in `yourapplication.app` and not
+        `yourapplication.views.frontend`)
+
+    .. versionadded:: 0.7
+       The `static_url_path`, `static_folder`, and `template_folder`
+       parameters were added.
+
+    .. versionadded:: 0.8
+       The `instance_path` and `instance_relative_config` parameters were
+       added.
+
+    .. versionadded:: 0.11
+       The `root_path` parameter was added.
+
+    .. versionadded:: 1.0
+       The ``host_matching`` and ``static_host`` parameters were added.
+
+    .. versionadded:: 1.0
+       The ``subdomain_matching`` parameter was added. Subdomain
+       matching needs to be enabled manually now. Setting
+       :data:`SERVER_NAME` does not implicitly enable it.
+
+    :param import_name: the name of the application package
+    :param static_url_path: can be used to specify a different path for the
+                            static files on the web.  Defaults to the name
+                            of the `static_folder` folder.
+    :param static_folder: The folder with static files that is served at
+        ``static_url_path``. Relative to the application ``root_path``
+        or an absolute path. Defaults to ``'static'``.
+    :param static_host: the host to use when adding the static route.
+        Defaults to None. Required when using ``host_matching=True``
+        with a ``static_folder`` configured.
+    :param host_matching: set ``url_map.host_matching`` attribute.
+        Defaults to False.
+    :param subdomain_matching: consider the subdomain relative to
+        :data:`SERVER_NAME` when matching routes. Defaults to False.
+    :param template_folder: the folder that contains the templates that should
+                            be used by the application.  Defaults to
+                            ``'templates'`` folder in the root path of the
+                            application.
+    :param instance_path: An alternative instance path for the application.
+                          By default the folder ``'instance'`` next to the
+                          package or module is assumed to be the instance
+                          path.
+    :param instance_relative_config: if set to ``True`` relative filenames
+                                     for loading the config are assumed to
+                                     be relative to the instance path instead
+                                     of the application root.
+    :param root_path: Flask by default will automatically calculate the path
+                      to the root of the application.  In certain situations
+                      this cannot be achieved (for instance if the package
+                      is a Python 3 namespace package) and needs to be
+                      manually defined.
+    """
+
+    #: The class that is used for request objects.  See :class:`~flask.Request`
+    #: for more information.
+    request_class = Request
+
+    #: The class that is used for response objects.  See
+    #: :class:`~flask.Response` for more information.
+    response_class = Response
+
+    #: The class that is used for the Jinja environment.
+    #:
+    #: .. versionadded:: 0.11
+    jinja_environment = Environment
+
+    #: The class that is used for the :data:`~flask.g` instance.
+    #:
+    #: Example use cases for a custom class:
+    #:
+    #: 1. Store arbitrary attributes on flask.g.
+    #: 2. Add a property for lazy per-request database connectors.
+    #: 3. Return None instead of AttributeError on unexpected attributes.
+    #: 4. Raise exception if an unexpected attr is set, a "controlled" flask.g.
+    #:
+    #: In Flask 0.9 this property was called `request_globals_class` but it
+    #: was changed in 0.10 to :attr:`app_ctx_globals_class` because the
+    #: flask.g object is now application context scoped.
+    #:
+    #: .. versionadded:: 0.10
+    app_ctx_globals_class = _AppCtxGlobals
+
+    #: The class that is used for the ``config`` attribute of this app.
+    #: Defaults to :class:`~flask.Config`.
+    #:
+    #: Example use cases for a custom class:
+    #:
+    #: 1. Default values for certain config options.
+    #: 2. Access to config values through attributes in addition to keys.
+    #:
+    #: .. versionadded:: 0.11
+    config_class = Config
+
+    #: The testing flag.  Set this to ``True`` to enable the test mode of
+    #: Flask extensions (and in the future probably also Flask itself).
+    #: For example this might activate test helpers that have an
+    #: additional runtime cost which should not be enabled by default.
+    #:
+    #: If this is enabled and PROPAGATE_EXCEPTIONS is not changed from the
+    #: default it's implicitly enabled.
+    #:
+    #: This attribute can also be configured from the config with the
+    #: ``TESTING`` configuration key.  Defaults to ``False``.
+    testing = ConfigAttribute("TESTING")
+
+    #: If a secret key is set, cryptographic components can use this to
+    #: sign cookies and other things. Set this to a complex random value
+    #: when you want to use the secure cookie for instance.
+    #:
+    #: This attribute can also be configured from the config with the
+    #: :data:`SECRET_KEY` configuration key. Defaults to ``None``.
+    secret_key = ConfigAttribute("SECRET_KEY")
+
+    #: The secure cookie uses this for the name of the session cookie.
+    #:
+    #: This attribute can also be configured from the config with the
+    #: ``SESSION_COOKIE_NAME`` configuration key.  Defaults to ``'session'``
+    session_cookie_name = ConfigAttribute("SESSION_COOKIE_NAME")
+
+    #: A :class:`~datetime.timedelta` which is used to set the expiration
+    #: date of a permanent session.  The default is 31 days which makes a
+    #: permanent session survive for roughly one month.
+    #:
+    #: This attribute can also be configured from the config with the
+    #: ``PERMANENT_SESSION_LIFETIME`` configuration key.  Defaults to
+    #: ``timedelta(days=31)``
+    permanent_session_lifetime = ConfigAttribute(
+        "PERMANENT_SESSION_LIFETIME", get_converter=_make_timedelta
+    )
+
+    #: A :class:`~datetime.timedelta` which is used as default cache_timeout
+    #: for the :func:`send_file` functions. The default is 12 hours.
+    #:
+    #: This attribute can also be configured from the config with the
+    #: ``SEND_FILE_MAX_AGE_DEFAULT`` configuration key. This configuration
+    #: variable can also be set with an integer value used as seconds.
+    #: Defaults to ``timedelta(hours=12)``
+    send_file_max_age_default = ConfigAttribute(
+        "SEND_FILE_MAX_AGE_DEFAULT", get_converter=_make_timedelta
+    )
+
+    #: Enable this if you want to use the X-Sendfile feature.  Keep in
+    #: mind that the server has to support this.  This only affects files
+    #: sent with the :func:`send_file` method.
+    #:
+    #: .. versionadded:: 0.2
+    #:
+    #: This attribute can also be configured from the config with the
+    #: ``USE_X_SENDFILE`` configuration key.  Defaults to ``False``.
+    use_x_sendfile = ConfigAttribute("USE_X_SENDFILE")
+
+    #: The JSON encoder class to use.  Defaults to :class:`~flask.json.JSONEncoder`.
+    #:
+    #: .. versionadded:: 0.10
+    json_encoder = json.JSONEncoder
+
+    #: The JSON decoder class to use.  Defaults to :class:`~flask.json.JSONDecoder`.
+    #:
+    #: .. versionadded:: 0.10
+    json_decoder = json.JSONDecoder
+
+    #: Options that are passed to the Jinja environment in
+    #: :meth:`create_jinja_environment`. Changing these options after
+    #: the environment is created (accessing :attr:`jinja_env`) will
+    #: have no effect.
+    #:
+    #: .. versionchanged:: 1.1.0
+    #:     This is a ``dict`` instead of an ``ImmutableDict`` to allow
+    #:     easier configuration.
+    #:
+    jinja_options = {"extensions": ["jinja2.ext.autoescape", "jinja2.ext.with_"]}
+
+    #: Default configuration parameters.
+    default_config = ImmutableDict(
+        {
+            "ENV": None,
+            "DEBUG": None,
+            "TESTING": False,
+            "PROPAGATE_EXCEPTIONS": None,
+            "PRESERVE_CONTEXT_ON_EXCEPTION": None,
+            "SECRET_KEY": None,
+            "PERMANENT_SESSION_LIFETIME": timedelta(days=31),
+            "USE_X_SENDFILE": False,
+            "SERVER_NAME": None,
+            "APPLICATION_ROOT": "/",
+            "SESSION_COOKIE_NAME": "session",
+            "SESSION_COOKIE_DOMAIN": None,
+            "SESSION_COOKIE_PATH": None,
+            "SESSION_COOKIE_HTTPONLY": True,
+            "SESSION_COOKIE_SECURE": False,
+            "SESSION_COOKIE_SAMESITE": None,
+            "SESSION_REFRESH_EACH_REQUEST": True,
+            "MAX_CONTENT_LENGTH": None,
+            "SEND_FILE_MAX_AGE_DEFAULT": timedelta(hours=12),
+            "TRAP_BAD_REQUEST_ERRORS": None,
+            "TRAP_HTTP_EXCEPTIONS": False,
+            "EXPLAIN_TEMPLATE_LOADING": False,
+            "PREFERRED_URL_SCHEME": "http",
+            "JSON_AS_ASCII": True,
+            "JSON_SORT_KEYS": True,
+            "JSONIFY_PRETTYPRINT_REGULAR": False,
+            "JSONIFY_MIMETYPE": "application/json",
+            "TEMPLATES_AUTO_RELOAD": None,
+            "MAX_COOKIE_SIZE": 4093,
+        }
+    )
+
+    #: The rule object to use for URL rules created.  This is used by
+    #: :meth:`add_url_rule`.  Defaults to :class:`werkzeug.routing.Rule`.
+    #:
+    #: .. versionadded:: 0.7
+    url_rule_class = Rule
+
+    #: The map object to use for storing the URL rules and routing
+    #: configuration parameters. Defaults to :class:`werkzeug.routing.Map`.
+    #:
+    #: .. versionadded:: 1.1.0
+    url_map_class = Map
+
+    #: the test client that is used with when `test_client` is used.
+    #:
+    #: .. versionadded:: 0.7
+    test_client_class = None
+
+    #: The :class:`~click.testing.CliRunner` subclass, by default
+    #: :class:`~flask.testing.FlaskCliRunner` that is used by
+    #: :meth:`test_cli_runner`. Its ``__init__`` method should take a
+    #: Flask app object as the first argument.
+    #:
+    #: .. versionadded:: 1.0
+    test_cli_runner_class = None
+
+    #: the session interface to use.  By default an instance of
+    #: :class:`~flask.sessions.SecureCookieSessionInterface` is used here.
+    #:
+    #: .. versionadded:: 0.8
+    session_interface = SecureCookieSessionInterface()
+
+    # TODO remove the next three attrs when Sphinx :inherited-members: works
+    # https://github.com/sphinx-doc/sphinx/issues/741
+
+    #: The name of the package or module that this app belongs to. Do not
+    #: change this once it is set by the constructor.
+    import_name = None
+
+    #: Location of the template files to be added to the template lookup.
+    #: ``None`` if templates should not be added.
+    template_folder = None
+
+    #: Absolute path to the package on the filesystem. Used to look up
+    #: resources contained in the package.
+    root_path = None
+
+    def __init__(
+        self,
+        import_name,
+        static_url_path=None,
+        static_folder="static",
+        static_host=None,
+        host_matching=False,
+        subdomain_matching=False,
+        template_folder="templates",
+        instance_path=None,
+        instance_relative_config=False,
+        root_path=None,
+    ):
+        _PackageBoundObject.__init__(
+            self, import_name, template_folder=template_folder, root_path=root_path
+        )
+
+        self.static_url_path = static_url_path
+        self.static_folder = static_folder
+
+        if instance_path is None:
+            instance_path = self.auto_find_instance_path()
+        elif not os.path.isabs(instance_path):
+            raise ValueError(
+                "If an instance path is provided it must be absolute."
+                " A relative path was given instead."
+            )
+
+        #: Holds the path to the instance folder.
+        #:
+        #: .. versionadded:: 0.8
+        self.instance_path = instance_path
+
+        #: The configuration dictionary as :class:`Config`.  This behaves
+        #: exactly like a regular dictionary but supports additional methods
+        #: to load a config from files.
+        self.config = self.make_config(instance_relative_config)
+
+        #: A dictionary of all view functions registered.  The keys will
+        #: be function names which are also used to generate URLs and
+        #: the values are the function objects themselves.
+        #: To register a view function, use the :meth:`route` decorator.
+        self.view_functions = {}
+
+        #: A dictionary of all registered error handlers.  The key is ``None``
+        #: for error handlers active on the application, otherwise the key is
+        #: the name of the blueprint.  Each key points to another dictionary
+        #: where the key is the status code of the http exception.  The
+        #: special key ``None`` points to a list of tuples where the first item
+        #: is the class for the instance check and the second the error handler
+        #: function.
+        #:
+        #: To register an error handler, use the :meth:`errorhandler`
+        #: decorator.
+        self.error_handler_spec = {}
+
+        #: A list of functions that are called when :meth:`url_for` raises a
+        #: :exc:`~werkzeug.routing.BuildError`.  Each function registered here
+        #: is called with `error`, `endpoint` and `values`.  If a function
+        #: returns ``None`` or raises a :exc:`BuildError` the next function is
+        #: tried.
+        #:
+        #: .. versionadded:: 0.9
+        self.url_build_error_handlers = []
+
+        #: A dictionary with lists of functions that will be called at the
+        #: beginning of each request. The key of the dictionary is the name of
+        #: the blueprint this function is active for, or ``None`` for all
+        #: requests. To register a function, use the :meth:`before_request`
+        #: decorator.
+        self.before_request_funcs = {}
+
+        #: A list of functions that will be called at the beginning of the
+        #: first request to this instance. To register a function, use the
+        #: :meth:`before_first_request` decorator.
+        #:
+        #: .. versionadded:: 0.8
+        self.before_first_request_funcs = []
+
+        #: A dictionary with lists of functions that should be called after
+        #: each request.  The key of the dictionary is the name of the blueprint
+        #: this function is active for, ``None`` for all requests.  This can for
+        #: example be used to close database connections. To register a function
+        #: here, use the :meth:`after_request` decorator.
+        self.after_request_funcs = {}
+
+        #: A dictionary with lists of functions that are called after
+        #: each request, even if an exception has occurred. The key of the
+        #: dictionary is the name of the blueprint this function is active for,
+        #: ``None`` for all requests. These functions are not allowed to modify
+        #: the request, and their return values are ignored. If an exception
+        #: occurred while processing the request, it gets passed to each
+        #: teardown_request function. To register a function here, use the
+        #: :meth:`teardown_request` decorator.
+        #:
+        #: .. versionadded:: 0.7
+        self.teardown_request_funcs = {}
+
+        #: A list of functions that are called when the application context
+        #: is destroyed.  Since the application context is also torn down
+        #: if the request ends this is the place to store code that disconnects
+        #: from databases.
+        #:
+        #: .. versionadded:: 0.9
+        self.teardown_appcontext_funcs = []
+
+        #: A dictionary with lists of functions that are called before the
+        #: :attr:`before_request_funcs` functions. The key of the dictionary is
+        #: the name of the blueprint this function is active for, or ``None``
+        #: for all requests. To register a function, use
+        #: :meth:`url_value_preprocessor`.
+        #:
+        #: .. versionadded:: 0.7
+        self.url_value_preprocessors = {}
+
+        #: A dictionary with lists of functions that can be used as URL value
+        #: preprocessors.  The key ``None`` here is used for application wide
+        #: callbacks, otherwise the key is the name of the blueprint.
+        #: Each of these functions has the chance to modify the dictionary
+        #: of URL values before they are used as the keyword arguments of the
+        #: view function.  For each function registered this one should also
+        #: provide a :meth:`url_defaults` function that adds the parameters
+        #: automatically again that were removed that way.
+        #:
+        #: .. versionadded:: 0.7
+        self.url_default_functions = {}
+
+        #: A dictionary with list of functions that are called without argument
+        #: to populate the template context.  The key of the dictionary is the
+        #: name of the blueprint this function is active for, ``None`` for all
+        #: requests.  Each returns a dictionary that the template context is
+        #: updated with.  To register a function here, use the
+        #: :meth:`context_processor` decorator.
+        self.template_context_processors = {None: [_default_template_ctx_processor]}
+
+        #: A list of shell context processor functions that should be run
+        #: when a shell context is created.
+        #:
+        #: .. versionadded:: 0.11
+        self.shell_context_processors = []
+
+        #: all the attached blueprints in a dictionary by name.  Blueprints
+        #: can be attached multiple times so this dictionary does not tell
+        #: you how often they got attached.
+        #:
+        #: .. versionadded:: 0.7
+        self.blueprints = {}
+        self._blueprint_order = []
+
+        #: a place where extensions can store application specific state.  For
+        #: example this is where an extension could store database engines and
+        #: similar things.  For backwards compatibility extensions should register
+        #: themselves like this::
+        #:
+        #:      if not hasattr(app, 'extensions'):
+        #:          app.extensions = {}
+        #:      app.extensions['extensionname'] = SomeObject()
+        #:
+        #: The key must match the name of the extension module. For example in
+        #: case of a "Flask-Foo" extension in `flask_foo`, the key would be
+        #: ``'foo'``.
+        #:
+        #: .. versionadded:: 0.7
+        self.extensions = {}
+
+        #: The :class:`~werkzeug.routing.Map` for this instance.  You can use
+        #: this to change the routing converters after the class was created
+        #: but before any routes are connected.  Example::
+        #:
+        #:    from werkzeug.routing import BaseConverter
+        #:
+        #:    class ListConverter(BaseConverter):
+        #:        def to_python(self, value):
+        #:            return value.split(',')
+        #:        def to_url(self, values):
+        #:            return ','.join(super(ListConverter, self).to_url(value)
+        #:                            for value in values)
+        #:
+        #:    app = Flask(__name__)
+        #:    app.url_map.converters['list'] = ListConverter
+        self.url_map = self.url_map_class()
+
+        self.url_map.host_matching = host_matching
+        self.subdomain_matching = subdomain_matching
+
+        # tracks internally if the application already handled at least one
+        # request.
+        self._got_first_request = False
+        self._before_request_lock = Lock()
+
+        # Add a static route using the provided static_url_path, static_host,
+        # and static_folder if there is a configured static_folder.
+        # Note we do this without checking if static_folder exists.
+        # For one, it might be created while the server is running (e.g. during
+        # development). Also, Google App Engine stores static files somewhere
+        if self.has_static_folder:
+            assert (
+                bool(static_host) == host_matching
+            ), "Invalid static_host/host_matching combination"
+            self.add_url_rule(
+                self.static_url_path + "/<path:filename>",
+                endpoint="static",
+                host=static_host,
+                view_func=self.send_static_file,
+            )
+
+        # Set the name of the Click group in case someone wants to add
+        # the app's commands to another CLI tool.
+        self.cli.name = self.name
+
+    @locked_cached_property
+    def name(self):
+        """The name of the application.  This is usually the import name
+        with the difference that it's guessed from the run file if the
+        import name is main.  This name is used as a display name when
+        Flask needs the name of the application.  It can be set and overridden
+        to change the value.
+
+        .. versionadded:: 0.8
+        """
+        if self.import_name == "__main__":
+            fn = getattr(sys.modules["__main__"], "__file__", None)
+            if fn is None:
+                return "__main__"
+            return os.path.splitext(os.path.basename(fn))[0]
+        return self.import_name
+
+    @property
+    def propagate_exceptions(self):
+        """Returns the value of the ``PROPAGATE_EXCEPTIONS`` configuration
+        value in case it's set, otherwise a sensible default is returned.
+
+        .. versionadded:: 0.7
+        """
+        rv = self.config["PROPAGATE_EXCEPTIONS"]
+        if rv is not None:
+            return rv
+        return self.testing or self.debug
+
+    @property
+    def preserve_context_on_exception(self):
+        """Returns the value of the ``PRESERVE_CONTEXT_ON_EXCEPTION``
+        configuration value in case it's set, otherwise a sensible default
+        is returned.
+
+        .. versionadded:: 0.7
+        """
+        rv = self.config["PRESERVE_CONTEXT_ON_EXCEPTION"]
+        if rv is not None:
+            return rv
+        return self.debug
+
+    @locked_cached_property
+    def logger(self):
+        """A standard Python :class:`~logging.Logger` for the app, with
+        the same name as :attr:`name`.
+
+        In debug mode, the logger's :attr:`~logging.Logger.level` will
+        be set to :data:`~logging.DEBUG`.
+
+        If there are no handlers configured, a default handler will be
+        added. See :doc:`/logging` for more information.
+
+        .. versionchanged:: 1.1.0
+            The logger takes the same name as :attr:`name` rather than
+            hard-coding ``"flask.app"``.
+
+        .. versionchanged:: 1.0.0
+            Behavior was simplified. The logger is always named
+            ``"flask.app"``. The level is only set during configuration,
+            it doesn't check ``app.debug`` each time. Only one format is
+            used, not different ones depending on ``app.debug``. No
+            handlers are removed, and a handler is only added if no
+            handlers are already configured.
+
+        .. versionadded:: 0.3
+        """
+        return create_logger(self)
+
+    @locked_cached_property
+    def jinja_env(self):
+        """The Jinja environment used to load templates.
+
+        The environment is created the first time this property is
+        accessed. Changing :attr:`jinja_options` after that will have no
+        effect.
+        """
+        return self.create_jinja_environment()
+
+    @property
+    def got_first_request(self):
+        """This attribute is set to ``True`` if the application started
+        handling the first request.
+
+        .. versionadded:: 0.8
+        """
+        return self._got_first_request
+
+    def make_config(self, instance_relative=False):
+        """Used to create the config attribute by the Flask constructor.
+        The `instance_relative` parameter is passed in from the constructor
+        of Flask (there named `instance_relative_config`) and indicates if
+        the config should be relative to the instance path or the root path
+        of the application.
+
+        .. versionadded:: 0.8
+        """
+        root_path = self.root_path
+        if instance_relative:
+            root_path = self.instance_path
+        defaults = dict(self.default_config)
+        defaults["ENV"] = get_env()
+        defaults["DEBUG"] = get_debug_flag()
+        return self.config_class(root_path, defaults)
+
+    def auto_find_instance_path(self):
+        """Tries to locate the instance path if it was not provided to the
+        constructor of the application class.  It will basically calculate
+        the path to a folder named ``instance`` next to your main file or
+        the package.
+
+        .. versionadded:: 0.8
+        """
+        prefix, package_path = find_package(self.import_name)
+        if prefix is None:
+            return os.path.join(package_path, "instance")
+        return os.path.join(prefix, "var", self.name + "-instance")
+
+    def open_instance_resource(self, resource, mode="rb"):
+        """Opens a resource from the application's instance folder
+        (:attr:`instance_path`).  Otherwise works like
+        :meth:`open_resource`.  Instance resources can also be opened for
+        writing.
+
+        :param resource: the name of the resource.  To access resources within
+                         subfolders use forward slashes as separator.
+        :param mode: resource file opening mode, default is 'rb'.
+        """
+        return open(os.path.join(self.instance_path, resource), mode)
+
+    @property
+    def templates_auto_reload(self):
+        """Reload templates when they are changed. Used by
+        :meth:`create_jinja_environment`.
+
+        This attribute can be configured with :data:`TEMPLATES_AUTO_RELOAD`. If
+        not set, it will be enabled in debug mode.
+
+        .. versionadded:: 1.0
+            This property was added but the underlying config and behavior
+            already existed.
+        """
+        rv = self.config["TEMPLATES_AUTO_RELOAD"]
+        return rv if rv is not None else self.debug
+
+    @templates_auto_reload.setter
+    def templates_auto_reload(self, value):
+        self.config["TEMPLATES_AUTO_RELOAD"] = value
+
+    def create_jinja_environment(self):
+        """Create the Jinja environment based on :attr:`jinja_options`
+        and the various Jinja-related methods of the app. Changing
+        :attr:`jinja_options` after this will have no effect. Also adds
+        Flask-related globals and filters to the environment.
+
+        .. versionchanged:: 0.11
+           ``Environment.auto_reload`` set in accordance with
+           ``TEMPLATES_AUTO_RELOAD`` configuration option.
+
+        .. versionadded:: 0.5
+        """
+        options = dict(self.jinja_options)
+
+        if "autoescape" not in options:
+            options["autoescape"] = self.select_jinja_autoescape
+
+        if "auto_reload" not in options:
+            options["auto_reload"] = self.templates_auto_reload
+
+        rv = self.jinja_environment(self, **options)
+        rv.globals.update(
+            url_for=url_for,
+            get_flashed_messages=get_flashed_messages,
+            config=self.config,
+            # request, session and g are normally added with the
+            # context processor for efficiency reasons but for imported
+            # templates we also want the proxies in there.
+            request=request,
+            session=session,
+            g=g,
+        )
+        rv.filters["tojson"] = json.tojson_filter
+        return rv
+
+    def create_global_jinja_loader(self):
+        """Creates the loader for the Jinja2 environment.  Can be used to
+        override just the loader and keeping the rest unchanged.  It's
+        discouraged to override this function.  Instead one should override
+        the :meth:`jinja_loader` function instead.
+
+        The global loader dispatches between the loaders of the application
+        and the individual blueprints.
+
+        .. versionadded:: 0.7
+        """
+        return DispatchingJinjaLoader(self)
+
+    def select_jinja_autoescape(self, filename):
+        """Returns ``True`` if autoescaping should be active for the given
+        template name. If no template name is given, returns `True`.
+
+        .. versionadded:: 0.5
+        """
+        if filename is None:
+            return True
+        return filename.endswith((".html", ".htm", ".xml", ".xhtml"))
+
+    def update_template_context(self, context):
+        """Update the template context with some commonly used variables.
+        This injects request, session, config and g into the template
+        context as well as everything template context processors want
+        to inject.  Note that the as of Flask 0.6, the original values
+        in the context will not be overridden if a context processor
+        decides to return a value with the same key.
+
+        :param context: the context as a dictionary that is updated in place
+                        to add extra variables.
+        """
+        funcs = self.template_context_processors[None]
+        reqctx = _request_ctx_stack.top
+        if reqctx is not None:
+            bp = reqctx.request.blueprint
+            if bp is not None and bp in self.template_context_processors:
+                funcs = chain(funcs, self.template_context_processors[bp])
+        orig_ctx = context.copy()
+        for func in funcs:
+            context.update(func())
+        # make sure the original values win.  This makes it possible to
+        # easier add new variables in context processors without breaking
+        # existing views.
+        context.update(orig_ctx)
+
+    def make_shell_context(self):
+        """Returns the shell context for an interactive shell for this
+        application.  This runs all the registered shell context
+        processors.
+
+        .. versionadded:: 0.11
+        """
+        rv = {"app": self, "g": g}
+        for processor in self.shell_context_processors:
+            rv.update(processor())
+        return rv
+
+    #: What environment the app is running in. Flask and extensions may
+    #: enable behaviors based on the environment, such as enabling debug
+    #: mode. This maps to the :data:`ENV` config key. This is set by the
+    #: :envvar:`FLASK_ENV` environment variable and may not behave as
+    #: expected if set in code.
+    #:
+    #: **Do not enable development when deploying in production.**
+    #:
+    #: Default: ``'production'``
+    env = ConfigAttribute("ENV")
+
+    @property
+    def debug(self):
+        """Whether debug mode is enabled. When using ``flask run`` to start
+        the development server, an interactive debugger will be shown for
+        unhandled exceptions, and the server will be reloaded when code
+        changes. This maps to the :data:`DEBUG` config key. This is
+        enabled when :attr:`env` is ``'development'`` and is overridden
+        by the ``FLASK_DEBUG`` environment variable. It may not behave as
+        expected if set in code.
+
+        **Do not enable debug mode when deploying in production.**
+
+        Default: ``True`` if :attr:`env` is ``'development'``, or
+        ``False`` otherwise.
+        """
+        return self.config["DEBUG"]
+
+    @debug.setter
+    def debug(self, value):
+        self.config["DEBUG"] = value
+        self.jinja_env.auto_reload = self.templates_auto_reload
+
+    def run(self, host=None, port=None, debug=None, load_dotenv=True, **options):
+        """Runs the application on a local development server.
+
+        Do not use ``run()`` in a production setting. It is not intended to
+        meet security and performance requirements for a production server.
+        Instead, see :ref:`deployment` for WSGI server recommendations.
+
+        If the :attr:`debug` flag is set the server will automatically reload
+        for code changes and show a debugger in case an exception happened.
+
+        If you want to run the application in debug mode, but disable the
+        code execution on the interactive debugger, you can pass
+        ``use_evalex=False`` as parameter.  This will keep the debugger's
+        traceback screen active, but disable code execution.
+
+        It is not recommended to use this function for development with
+        automatic reloading as this is badly supported.  Instead you should
+        be using the :command:`flask` command line script's ``run`` support.
+
+        .. admonition:: Keep in Mind
+
+           Flask will suppress any server error with a generic error page
+           unless it is in debug mode.  As such to enable just the
+           interactive debugger without the code reloading, you have to
+           invoke :meth:`run` with ``debug=True`` and ``use_reloader=False``.
+           Setting ``use_debugger`` to ``True`` without being in debug mode
+           won't catch any exceptions because there won't be any to
+           catch.
+
+        :param host: the hostname to listen on. Set this to ``'0.0.0.0'`` to
+            have the server available externally as well. Defaults to
+            ``'127.0.0.1'`` or the host in the ``SERVER_NAME`` config variable
+            if present.
+        :param port: the port of the webserver. Defaults to ``5000`` or the
+            port defined in the ``SERVER_NAME`` config variable if present.
+        :param debug: if given, enable or disable debug mode. See
+            :attr:`debug`.
+        :param load_dotenv: Load the nearest :file:`.env` and :file:`.flaskenv`
+            files to set environment variables. Will also change the working
+            directory to the directory containing the first file found.
+        :param options: the options to be forwarded to the underlying Werkzeug
+            server. See :func:`werkzeug.serving.run_simple` for more
+            information.
+
+        .. versionchanged:: 1.0
+            If installed, python-dotenv will be used to load environment
+            variables from :file:`.env` and :file:`.flaskenv` files.
+
+            If set, the :envvar:`FLASK_ENV` and :envvar:`FLASK_DEBUG`
+            environment variables will override :attr:`env` and
+            :attr:`debug`.
+
+            Threaded mode is enabled by default.
+
+        .. versionchanged:: 0.10
+            The default port is now picked from the ``SERVER_NAME``
+            variable.
+        """
+        # Change this into a no-op if the server is invoked from the
+        # command line. Have a look at cli.py for more information.
+        if os.environ.get("FLASK_RUN_FROM_CLI") == "true":
+            from .debughelpers import explain_ignored_app_run
+
+            explain_ignored_app_run()
+            return
+
+        if get_load_dotenv(load_dotenv):
+            cli.load_dotenv()
+
+            # if set, let env vars override previous values
+            if "FLASK_ENV" in os.environ:
+                self.env = get_env()
+                self.debug = get_debug_flag()
+            elif "FLASK_DEBUG" in os.environ:
+                self.debug = get_debug_flag()
+
+        # debug passed to method overrides all other sources
+        if debug is not None:
+            self.debug = bool(debug)
+
+        _host = "127.0.0.1"
+        _port = 5000
+        server_name = self.config.get("SERVER_NAME")
+        sn_host, sn_port = None, None
+
+        if server_name:
+            sn_host, _, sn_port = server_name.partition(":")
+
+        host = host or sn_host or _host
+        # pick the first value that's not None (0 is allowed)
+        port = int(next((p for p in (port, sn_port) if p is not None), _port))
+
+        options.setdefault("use_reloader", self.debug)
+        options.setdefault("use_debugger", self.debug)
+        options.setdefault("threaded", True)
+
+        cli.show_server_banner(self.env, self.debug, self.name, False)
+
+        from werkzeug.serving import run_simple
+
+        try:
+            run_simple(host, port, self, **options)
+        finally:
+            # reset the first request information if the development server
+            # reset normally.  This makes it possible to restart the server
+            # without reloader and that stuff from an interactive shell.
+            self._got_first_request = False
+
+    def test_client(self, use_cookies=True, **kwargs):
+        """Creates a test client for this application.  For information
+        about unit testing head over to :ref:`testing`.
+
+        Note that if you are testing for assertions or exceptions in your
+        application code, you must set ``app.testing = True`` in order for the
+        exceptions to propagate to the test client.  Otherwise, the exception
+        will be handled by the application (not visible to the test client) and
+        the only indication of an AssertionError or other exception will be a
+        500 status code response to the test client.  See the :attr:`testing`
+        attribute.  For example::
+
+            app.testing = True
+            client = app.test_client()
+
+        The test client can be used in a ``with`` block to defer the closing down
+        of the context until the end of the ``with`` block.  This is useful if
+        you want to access the context locals for testing::
+
+            with app.test_client() as c:
+                rv = c.get('/?vodka=42')
+                assert request.args['vodka'] == '42'
+
+        Additionally, you may pass optional keyword arguments that will then
+        be passed to the application's :attr:`test_client_class` constructor.
+        For example::
+
+            from flask.testing import FlaskClient
+
+            class CustomClient(FlaskClient):
+                def __init__(self, *args, **kwargs):
+                    self._authentication = kwargs.pop("authentication")
+                    super(CustomClient,self).__init__( *args, **kwargs)
+
+            app.test_client_class = CustomClient
+            client = app.test_client(authentication='Basic ....')
+
+        See :class:`~flask.testing.FlaskClient` for more information.
+
+        .. versionchanged:: 0.4
+           added support for ``with`` block usage for the client.
+
+        .. versionadded:: 0.7
+           The `use_cookies` parameter was added as well as the ability
+           to override the client to be used by setting the
+           :attr:`test_client_class` attribute.
+
+        .. versionchanged:: 0.11
+           Added `**kwargs` to support passing additional keyword arguments to
+           the constructor of :attr:`test_client_class`.
+        """
+        cls = self.test_client_class
+        if cls is None:
+            from .testing import FlaskClient as cls
+        return cls(self, self.response_class, use_cookies=use_cookies, **kwargs)
+
+    def test_cli_runner(self, **kwargs):
+        """Create a CLI runner for testing CLI commands.
+        See :ref:`testing-cli`.
+
+        Returns an instance of :attr:`test_cli_runner_class`, by default
+        :class:`~flask.testing.FlaskCliRunner`. The Flask app object is
+        passed as the first argument.
+
+        .. versionadded:: 1.0
+        """
+        cls = self.test_cli_runner_class
+
+        if cls is None:
+            from .testing import FlaskCliRunner as cls
+
+        return cls(self, **kwargs)
+
+    def open_session(self, request):
+        """Creates or opens a new session.  Default implementation stores all
+        session data in a signed cookie.  This requires that the
+        :attr:`secret_key` is set.  Instead of overriding this method
+        we recommend replacing the :class:`session_interface`.
+
+        .. deprecated: 1.0
+            Will be removed in 2.0. Use
+            ``session_interface.open_session`` instead.
+
+        :param request: an instance of :attr:`request_class`.
+        """
+
+        warnings.warn(
+            DeprecationWarning(
+                '"open_session" is deprecated and will be removed in'
+                ' 2.0. Use "session_interface.open_session" instead.'
+            )
+        )
+        return self.session_interface.open_session(self, request)
+
+    def save_session(self, session, response):
+        """Saves the session if it needs updates.  For the default
+        implementation, check :meth:`open_session`.  Instead of overriding this
+        method we recommend replacing the :class:`session_interface`.
+
+        .. deprecated: 1.0
+            Will be removed in 2.0. Use
+            ``session_interface.save_session`` instead.
+
+        :param session: the session to be saved (a
+                        :class:`~werkzeug.contrib.securecookie.SecureCookie`
+                        object)
+        :param response: an instance of :attr:`response_class`
+        """
+
+        warnings.warn(
+            DeprecationWarning(
+                '"save_session" is deprecated and will be removed in'
+                ' 2.0. Use "session_interface.save_session" instead.'
+            )
+        )
+        return self.session_interface.save_session(self, session, response)
+
+    def make_null_session(self):
+        """Creates a new instance of a missing session.  Instead of overriding
+        this method we recommend replacing the :class:`session_interface`.
+
+        .. deprecated: 1.0
+            Will be removed in 2.0. Use
+            ``session_interface.make_null_session`` instead.
+
+        .. versionadded:: 0.7
+        """
+
+        warnings.warn(
+            DeprecationWarning(
+                '"make_null_session" is deprecated and will be removed'
+                ' in 2.0. Use "session_interface.make_null_session"'
+                " instead."
+            )
+        )
+        return self.session_interface.make_null_session(self)
+
+    @setupmethod
+    def register_blueprint(self, blueprint, **options):
+        """Register a :class:`~flask.Blueprint` on the application. Keyword
+        arguments passed to this method will override the defaults set on the
+        blueprint.
+
+        Calls the blueprint's :meth:`~flask.Blueprint.register` method after
+        recording the blueprint in the application's :attr:`blueprints`.
+
+        :param blueprint: The blueprint to register.
+        :param url_prefix: Blueprint routes will be prefixed with this.
+        :param subdomain: Blueprint routes will match on this subdomain.
+        :param url_defaults: Blueprint routes will use these default values for
+            view arguments.
+        :param options: Additional keyword arguments are passed to
+            :class:`~flask.blueprints.BlueprintSetupState`. They can be
+            accessed in :meth:`~flask.Blueprint.record` callbacks.
+
+        .. versionadded:: 0.7
+        """
+        first_registration = False
+
+        if blueprint.name in self.blueprints:
+            assert self.blueprints[blueprint.name] is blueprint, (
+                "A name collision occurred between blueprints %r and %r. Both"
+                ' share the same name "%s". Blueprints that are created on the'
+                " fly need unique names."
+                % (blueprint, self.blueprints[blueprint.name], blueprint.name)
+            )
+        else:
+            self.blueprints[blueprint.name] = blueprint
+            self._blueprint_order.append(blueprint)
+            first_registration = True
+
+        blueprint.register(self, options, first_registration)
+
+    def iter_blueprints(self):
+        """Iterates over all blueprints by the order they were registered.
+
+        .. versionadded:: 0.11
+        """
+        return iter(self._blueprint_order)
+
+    @setupmethod
+    def add_url_rule(
+        self,
+        rule,
+        endpoint=None,
+        view_func=None,
+        provide_automatic_options=None,
+        **options
+    ):
+        """Connects a URL rule.  Works exactly like the :meth:`route`
+        decorator.  If a view_func is provided it will be registered with the
+        endpoint.
+
+        Basically this example::
+
+            @app.route('/')
+            def index():
+                pass
+
+        Is equivalent to the following::
+
+            def index():
+                pass
+            app.add_url_rule('/', 'index', index)
+
+        If the view_func is not provided you will need to connect the endpoint
+        to a view function like so::
+
+            app.view_functions['index'] = index
+
+        Internally :meth:`route` invokes :meth:`add_url_rule` so if you want
+        to customize the behavior via subclassing you only need to change
+        this method.
+
+        For more information refer to :ref:`url-route-registrations`.
+
+        .. versionchanged:: 0.2
+           `view_func` parameter added.
+
+        .. versionchanged:: 0.6
+           ``OPTIONS`` is added automatically as method.
+
+        :param rule: the URL rule as string
+        :param endpoint: the endpoint for the registered URL rule.  Flask
+                         itself assumes the name of the view function as
+                         endpoint
+        :param view_func: the function to call when serving a request to the
+                          provided endpoint
+        :param provide_automatic_options: controls whether the ``OPTIONS``
+            method should be added automatically. This can also be controlled
+            by setting the ``view_func.provide_automatic_options = False``
+            before adding the rule.
+        :param options: the options to be forwarded to the underlying
+                        :class:`~werkzeug.routing.Rule` object.  A change
+                        to Werkzeug is handling of method options.  methods
+                        is a list of methods this rule should be limited
+                        to (``GET``, ``POST`` etc.).  By default a rule
+                        just listens for ``GET`` (and implicitly ``HEAD``).
+                        Starting with Flask 0.6, ``OPTIONS`` is implicitly
+                        added and handled by the standard request handling.
+        """
+        if endpoint is None:
+            endpoint = _endpoint_from_view_func(view_func)
+        options["endpoint"] = endpoint
+        methods = options.pop("methods", None)
+
+        # if the methods are not given and the view_func object knows its
+        # methods we can use that instead.  If neither exists, we go with
+        # a tuple of only ``GET`` as default.
+        if methods is None:
+            methods = getattr(view_func, "methods", None) or ("GET",)
+        if isinstance(methods, string_types):
+            raise TypeError(
+                "Allowed methods have to be iterables of strings, "
+                'for example: @app.route(..., methods=["POST"])'
+            )
+        methods = set(item.upper() for item in methods)
+
+        # Methods that should always be added
+        required_methods = set(getattr(view_func, "required_methods", ()))
+
+        # starting with Flask 0.8 the view_func object can disable and
+        # force-enable the automatic options handling.
+        if provide_automatic_options is None:
+            provide_automatic_options = getattr(
+                view_func, "provide_automatic_options", None
+            )
+
+        if provide_automatic_options is None:
+            if "OPTIONS" not in methods:
+                provide_automatic_options = True
+                required_methods.add("OPTIONS")
+            else:
+                provide_automatic_options = False
+
+        # Add the required methods now.
+        methods |= required_methods
+
+        rule = self.url_rule_class(rule, methods=methods, **options)
+        rule.provide_automatic_options = provide_automatic_options
+
+        self.url_map.add(rule)
+        if view_func is not None:
+            old_func = self.view_functions.get(endpoint)
+            if old_func is not None and old_func != view_func:
+                raise AssertionError(
+                    "View function mapping is overwriting an "
+                    "existing endpoint function: %s" % endpoint
+                )
+            self.view_functions[endpoint] = view_func
+
+    def route(self, rule, **options):
+        """A decorator that is used to register a view function for a
+        given URL rule.  This does the same thing as :meth:`add_url_rule`
+        but is intended for decorator usage::
+
+            @app.route('/')
+            def index():
+                return 'Hello World'
+
+        For more information refer to :ref:`url-route-registrations`.
+
+        :param rule: the URL rule as string
+        :param endpoint: the endpoint for the registered URL rule.  Flask
+                         itself assumes the name of the view function as
+                         endpoint
+        :param options: the options to be forwarded to the underlying
+                        :class:`~werkzeug.routing.Rule` object.  A change
+                        to Werkzeug is handling of method options.  methods
+                        is a list of methods this rule should be limited
+                        to (``GET``, ``POST`` etc.).  By default a rule
+                        just listens for ``GET`` (and implicitly ``HEAD``).
+                        Starting with Flask 0.6, ``OPTIONS`` is implicitly
+                        added and handled by the standard request handling.
+        """
+
+        def decorator(f):
+            endpoint = options.pop("endpoint", None)
+            self.add_url_rule(rule, endpoint, f, **options)
+            return f
+
+        return decorator
+
+    @setupmethod
+    def endpoint(self, endpoint):
+        """A decorator to register a function as an endpoint.
+        Example::
+
+            @app.endpoint('example.endpoint')
+            def example():
+                return "example"
+
+        :param endpoint: the name of the endpoint
+        """
+
+        def decorator(f):
+            self.view_functions[endpoint] = f
+            return f
+
+        return decorator
+
+    @staticmethod
+    def _get_exc_class_and_code(exc_class_or_code):
+        """Get the exception class being handled. For HTTP status codes
+        or ``HTTPException`` subclasses, return both the exception and
+        status code.
+
+        :param exc_class_or_code: Any exception class, or an HTTP status
+            code as an integer.
+        """
+        if isinstance(exc_class_or_code, integer_types):
+            exc_class = default_exceptions[exc_class_or_code]
+        else:
+            exc_class = exc_class_or_code
+
+        assert issubclass(exc_class, Exception)
+
+        if issubclass(exc_class, HTTPException):
+            return exc_class, exc_class.code
+        else:
+            return exc_class, None
+
+    @setupmethod
+    def errorhandler(self, code_or_exception):
+        """Register a function to handle errors by code or exception class.
+
+        A decorator that is used to register a function given an
+        error code.  Example::
+
+            @app.errorhandler(404)
+            def page_not_found(error):
+                return 'This page does not exist', 404
+
+        You can also register handlers for arbitrary exceptions::
+
+            @app.errorhandler(DatabaseError)
+            def special_exception_handler(error):
+                return 'Database connection failed', 500
+
+        .. versionadded:: 0.7
+            Use :meth:`register_error_handler` instead of modifying
+            :attr:`error_handler_spec` directly, for application wide error
+            handlers.
+
+        .. versionadded:: 0.7
+           One can now additionally also register custom exception types
+           that do not necessarily have to be a subclass of the
+           :class:`~werkzeug.exceptions.HTTPException` class.
+
+        :param code_or_exception: the code as integer for the handler, or
+                                  an arbitrary exception
+        """
+
+        def decorator(f):
+            self._register_error_handler(None, code_or_exception, f)
+            return f
+
+        return decorator
+
+    @setupmethod
+    def register_error_handler(self, code_or_exception, f):
+        """Alternative error attach function to the :meth:`errorhandler`
+        decorator that is more straightforward to use for non decorator
+        usage.
+
+        .. versionadded:: 0.7
+        """
+        self._register_error_handler(None, code_or_exception, f)
+
+    @setupmethod
+    def _register_error_handler(self, key, code_or_exception, f):
+        """
+        :type key: None|str
+        :type code_or_exception: int|T<=Exception
+        :type f: callable
+        """
+        if isinstance(code_or_exception, HTTPException):  # old broken behavior
+            raise ValueError(
+                "Tried to register a handler for an exception instance {0!r}."
+                " Handlers can only be registered for exception classes or"
+                " HTTP error codes.".format(code_or_exception)
+            )
+
+        try:
+            exc_class, code = self._get_exc_class_and_code(code_or_exception)
+        except KeyError:
+            raise KeyError(
+                "'{0}' is not a recognized HTTP error code. Use a subclass of"
+                " HTTPException with that code instead.".format(code_or_exception)
+            )
+
+        handlers = self.error_handler_spec.setdefault(key, {}).setdefault(code, {})
+        handlers[exc_class] = f
+
+    @setupmethod
+    def template_filter(self, name=None):
+        """A decorator that is used to register custom template filter.
+        You can specify a name for the filter, otherwise the function
+        name will be used. Example::
+
+          @app.template_filter()
+          def reverse(s):
+              return s[::-1]
+
+        :param name: the optional name of the filter, otherwise the
+                     function name will be used.
+        """
+
+        def decorator(f):
+            self.add_template_filter(f, name=name)
+            return f
+
+        return decorator
+
+    @setupmethod
+    def add_template_filter(self, f, name=None):
+        """Register a custom template filter.  Works exactly like the
+        :meth:`template_filter` decorator.
+
+        :param name: the optional name of the filter, otherwise the
+                     function name will be used.
+        """
+        self.jinja_env.filters[name or f.__name__] = f
+
+    @setupmethod
+    def template_test(self, name=None):
+        """A decorator that is used to register custom template test.
+        You can specify a name for the test, otherwise the function
+        name will be used. Example::
+
+          @app.template_test()
+          def is_prime(n):
+              if n == 2:
+                  return True
+              for i in range(2, int(math.ceil(math.sqrt(n))) + 1):
+                  if n % i == 0:
+                      return False
+              return True
+
+        .. versionadded:: 0.10
+
+        :param name: the optional name of the test, otherwise the
+                     function name will be used.
+        """
+
+        def decorator(f):
+            self.add_template_test(f, name=name)
+            return f
+
+        return decorator
+
+    @setupmethod
+    def add_template_test(self, f, name=None):
+        """Register a custom template test.  Works exactly like the
+        :meth:`template_test` decorator.
+
+        .. versionadded:: 0.10
+
+        :param name: the optional name of the test, otherwise the
+                     function name will be used.
+        """
+        self.jinja_env.tests[name or f.__name__] = f
+
+    @setupmethod
+    def template_global(self, name=None):
+        """A decorator that is used to register a custom template global function.
+        You can specify a name for the global function, otherwise the function
+        name will be used. Example::
+
+            @app.template_global()
+            def double(n):
+                return 2 * n
+
+        .. versionadded:: 0.10
+
+        :param name: the optional name of the global function, otherwise the
+                     function name will be used.
+        """
+
+        def decorator(f):
+            self.add_template_global(f, name=name)
+            return f
+
+        return decorator
+
+    @setupmethod
+    def add_template_global(self, f, name=None):
+        """Register a custom template global function. Works exactly like the
+        :meth:`template_global` decorator.
+
+        .. versionadded:: 0.10
+
+        :param name: the optional name of the global function, otherwise the
+                     function name will be used.
+        """
+        self.jinja_env.globals[name or f.__name__] = f
+
+    @setupmethod
+    def before_request(self, f):
+        """Registers a function to run before each request.
+
+        For example, this can be used to open a database connection, or to load
+        the logged in user from the session.
+
+        The function will be called without any arguments. If it returns a
+        non-None value, the value is handled as if it was the return value from
+        the view, and further request handling is stopped.
+        """
+        self.before_request_funcs.setdefault(None, []).append(f)
+        return f
+
+    @setupmethod
+    def before_first_request(self, f):
+        """Registers a function to be run before the first request to this
+        instance of the application.
+
+        The function will be called without any arguments and its return
+        value is ignored.
+
+        .. versionadded:: 0.8
+        """
+        self.before_first_request_funcs.append(f)
+        return f
+
+    @setupmethod
+    def after_request(self, f):
+        """Register a function to be run after each request.
+
+        Your function must take one parameter, an instance of
+        :attr:`response_class` and return a new response object or the
+        same (see :meth:`process_response`).
+
+        As of Flask 0.7 this function might not be executed at the end of the
+        request in case an unhandled exception occurred.
+        """
+        self.after_request_funcs.setdefault(None, []).append(f)
+        return f
+
+    @setupmethod
+    def teardown_request(self, f):
+        """Register a function to be run at the end of each request,
+        regardless of whether there was an exception or not.  These functions
+        are executed when the request context is popped, even if not an
+        actual request was performed.
+
+        Example::
+
+            ctx = app.test_request_context()
+            ctx.push()
+            ...
+            ctx.pop()
+
+        When ``ctx.pop()`` is executed in the above example, the teardown
+        functions are called just before the request context moves from the
+        stack of active contexts.  This becomes relevant if you are using
+        such constructs in tests.
+
+        Generally teardown functions must take every necessary step to avoid
+        that they will fail.  If they do execute code that might fail they
+        will have to surround the execution of these code by try/except
+        statements and log occurring errors.
+
+        When a teardown function was called because of an exception it will
+        be passed an error object.
+
+        The return values of teardown functions are ignored.
+
+        .. admonition:: Debug Note
+
+           In debug mode Flask will not tear down a request on an exception
+           immediately.  Instead it will keep it alive so that the interactive
+           debugger can still access it.  This behavior can be controlled
+           by the ``PRESERVE_CONTEXT_ON_EXCEPTION`` configuration variable.
+        """
+        self.teardown_request_funcs.setdefault(None, []).append(f)
+        return f
+
+    @setupmethod
+    def teardown_appcontext(self, f):
+        """Registers a function to be called when the application context
+        ends.  These functions are typically also called when the request
+        context is popped.
+
+        Example::
+
+            ctx = app.app_context()
+            ctx.push()
+            ...
+            ctx.pop()
+
+        When ``ctx.pop()`` is executed in the above example, the teardown
+        functions are called just before the app context moves from the
+        stack of active contexts.  This becomes relevant if you are using
+        such constructs in tests.
+
+        Since a request context typically also manages an application
+        context it would also be called when you pop a request context.
+
+        When a teardown function was called because of an unhandled exception
+        it will be passed an error object. If an :meth:`errorhandler` is
+        registered, it will handle the exception and the teardown will not
+        receive it.
+
+        The return values of teardown functions are ignored.
+
+        .. versionadded:: 0.9
+        """
+        self.teardown_appcontext_funcs.append(f)
+        return f
+
+    @setupmethod
+    def context_processor(self, f):
+        """Registers a template context processor function."""
+        self.template_context_processors[None].append(f)
+        return f
+
+    @setupmethod
+    def shell_context_processor(self, f):
+        """Registers a shell context processor function.
+
+        .. versionadded:: 0.11
+        """
+        self.shell_context_processors.append(f)
+        return f
+
+    @setupmethod
+    def url_value_preprocessor(self, f):
+        """Register a URL value preprocessor function for all view
+        functions in the application. These functions will be called before the
+        :meth:`before_request` functions.
+
+        The function can modify the values captured from the matched url before
+        they are passed to the view. For example, this can be used to pop a
+        common language code value and place it in ``g`` rather than pass it to
+        every view.
+
+        The function is passed the endpoint name and values dict. The return
+        value is ignored.
+        """
+        self.url_value_preprocessors.setdefault(None, []).append(f)
+        return f
+
+    @setupmethod
+    def url_defaults(self, f):
+        """Callback function for URL defaults for all view functions of the
+        application.  It's called with the endpoint and values and should
+        update the values passed in place.
+        """
+        self.url_default_functions.setdefault(None, []).append(f)
+        return f
+
+    def _find_error_handler(self, e):
+        """Return a registered error handler for an exception in this order:
+        blueprint handler for a specific code, app handler for a specific code,
+        blueprint handler for an exception class, app handler for an exception
+        class, or ``None`` if a suitable handler is not found.
+        """
+        exc_class, code = self._get_exc_class_and_code(type(e))
+
+        for name, c in (
+            (request.blueprint, code),
+            (None, code),
+            (request.blueprint, None),
+            (None, None),
+        ):
+            handler_map = self.error_handler_spec.setdefault(name, {}).get(c)
+
+            if not handler_map:
+                continue
+
+            for cls in exc_class.__mro__:
+                handler = handler_map.get(cls)
+
+                if handler is not None:
+                    return handler
+
+    def handle_http_exception(self, e):
+        """Handles an HTTP exception.  By default this will invoke the
+        registered error handlers and fall back to returning the
+        exception as response.
+
+        .. versionchanged:: 1.0.3
+            ``RoutingException``, used internally for actions such as
+             slash redirects during routing, is not passed to error
+             handlers.
+
+        .. versionchanged:: 1.0
+            Exceptions are looked up by code *and* by MRO, so
+            ``HTTPExcpetion`` subclasses can be handled with a catch-all
+            handler for the base ``HTTPException``.
+
+        .. versionadded:: 0.3
+        """
+        # Proxy exceptions don't have error codes.  We want to always return
+        # those unchanged as errors
+        if e.code is None:
+            return e
+
+        # RoutingExceptions are used internally to trigger routing
+        # actions, such as slash redirects raising RequestRedirect. They
+        # are not raised or handled in user code.
+        if isinstance(e, RoutingException):
+            return e
+
+        handler = self._find_error_handler(e)
+        if handler is None:
+            return e
+        return handler(e)
+
+    def trap_http_exception(self, e):
+        """Checks if an HTTP exception should be trapped or not.  By default
+        this will return ``False`` for all exceptions except for a bad request
+        key error if ``TRAP_BAD_REQUEST_ERRORS`` is set to ``True``.  It
+        also returns ``True`` if ``TRAP_HTTP_EXCEPTIONS`` is set to ``True``.
+
+        This is called for all HTTP exceptions raised by a view function.
+        If it returns ``True`` for any exception the error handler for this
+        exception is not called and it shows up as regular exception in the
+        traceback.  This is helpful for debugging implicitly raised HTTP
+        exceptions.
+
+        .. versionchanged:: 1.0
+            Bad request errors are not trapped by default in debug mode.
+
+        .. versionadded:: 0.8
+        """
+        if self.config["TRAP_HTTP_EXCEPTIONS"]:
+            return True
+
+        trap_bad_request = self.config["TRAP_BAD_REQUEST_ERRORS"]
+
+        # if unset, trap key errors in debug mode
+        if (
+            trap_bad_request is None
+            and self.debug
+            and isinstance(e, BadRequestKeyError)
+        ):
+            return True
+
+        if trap_bad_request:
+            return isinstance(e, BadRequest)
+
+        return False
+
+    def handle_user_exception(self, e):
+        """This method is called whenever an exception occurs that
+        should be handled. A special case is :class:`~werkzeug
+        .exceptions.HTTPException` which is forwarded to the
+        :meth:`handle_http_exception` method. This function will either
+        return a response value or reraise the exception with the same
+        traceback.
+
+        .. versionchanged:: 1.0
+            Key errors raised from request data like ``form`` show the
+            bad key in debug mode rather than a generic bad request
+            message.
+
+        .. versionadded:: 0.7
+        """
+        exc_type, exc_value, tb = sys.exc_info()
+        assert exc_value is e
+        # ensure not to trash sys.exc_info() at that point in case someone
+        # wants the traceback preserved in handle_http_exception.  Of course
+        # we cannot prevent users from trashing it themselves in a custom
+        # trap_http_exception method so that's their fault then.
+
+        if isinstance(e, BadRequestKeyError):
+            if self.debug or self.config["TRAP_BAD_REQUEST_ERRORS"]:
+                e.show_exception = True
+
+                # Werkzeug < 0.15 doesn't add the KeyError to the 400
+                # message, add it in manually.
+                # TODO: clean up once Werkzeug >= 0.15.5 is required
+                if e.args[0] not in e.get_description():
+                    e.description = "KeyError: '{}'".format(*e.args)
+            elif not hasattr(BadRequestKeyError, "show_exception"):
+                e.args = ()
+
+        if isinstance(e, HTTPException) and not self.trap_http_exception(e):
+            return self.handle_http_exception(e)
+
+        handler = self._find_error_handler(e)
+
+        if handler is None:
+            reraise(exc_type, exc_value, tb)
+        return handler(e)
+
+    def handle_exception(self, e):
+        """Handle an exception that did not have an error handler
+        associated with it, or that was raised from an error handler.
+        This always causes a 500 ``InternalServerError``.
+
+        Always sends the :data:`got_request_exception` signal.
+
+        If :attr:`propagate_exceptions` is ``True``, such as in debug
+        mode, the error will be re-raised so that the debugger can
+        display it. Otherwise, the original exception is logged, and
+        an :exc:`~werkzeug.exceptions.InternalServerError` is returned.
+
+        If an error handler is registered for ``InternalServerError`` or
+        ``500``, it will be used. For consistency, the handler will
+        always receive the ``InternalServerError``. The original
+        unhandled exception is available as ``e.original_exception``.
+
+        .. note::
+            Prior to Werkzeug 1.0.0, ``InternalServerError`` will not
+            always have an ``original_exception`` attribute. Use
+            ``getattr(e, "original_exception", None)`` to simulate the
+            behavior for compatibility.
+
+        .. versionchanged:: 1.1.0
+            Always passes the ``InternalServerError`` instance to the
+            handler, setting ``original_exception`` to the unhandled
+            error.
+
+        .. versionchanged:: 1.1.0
+            ``after_request`` functions and other finalization is done
+            even for the default 500 response when there is no handler.
+
+        .. versionadded:: 0.3
+        """
+        exc_type, exc_value, tb = sys.exc_info()
+        got_request_exception.send(self, exception=e)
+
+        if self.propagate_exceptions:
+            # if we want to repropagate the exception, we can attempt to
+            # raise it with the whole traceback in case we can do that
+            # (the function was actually called from the except part)
+            # otherwise, we just raise the error again
+            if exc_value is e:
+                reraise(exc_type, exc_value, tb)
+            else:
+                raise e
+
+        self.log_exception((exc_type, exc_value, tb))
+        server_error = InternalServerError()
+        # TODO: pass as param when Werkzeug>=1.0.0 is required
+        # TODO: also remove note about this from docstring and docs
+        server_error.original_exception = e
+        handler = self._find_error_handler(server_error)
+
+        if handler is not None:
+            server_error = handler(server_error)
+
+        return self.finalize_request(server_error, from_error_handler=True)
+
+    def log_exception(self, exc_info):
+        """Logs an exception.  This is called by :meth:`handle_exception`
+        if debugging is disabled and right before the handler is called.
+        The default implementation logs the exception as error on the
+        :attr:`logger`.
+
+        .. versionadded:: 0.8
+        """
+        self.logger.error(
+            "Exception on %s [%s]" % (request.path, request.method), exc_info=exc_info
+        )
+
+    def raise_routing_exception(self, request):
+        """Exceptions that are recording during routing are reraised with
+        this method.  During debug we are not reraising redirect requests
+        for non ``GET``, ``HEAD``, or ``OPTIONS`` requests and we're raising
+        a different error instead to help debug situations.
+
+        :internal:
+        """
+        if (
+            not self.debug
+            or not isinstance(request.routing_exception, RequestRedirect)
+            or request.method in ("GET", "HEAD", "OPTIONS")
+        ):
+            raise request.routing_exception
+
+        from .debughelpers import FormDataRoutingRedirect
+
+        raise FormDataRoutingRedirect(request)
+
+    def dispatch_request(self):
+        """Does the request dispatching.  Matches the URL and returns the
+        return value of the view or error handler.  This does not have to
+        be a response object.  In order to convert the return value to a
+        proper response object, call :func:`make_response`.
+
+        .. versionchanged:: 0.7
+           This no longer does the exception handling, this code was
+           moved to the new :meth:`full_dispatch_request`.
+        """
+        req = _request_ctx_stack.top.request
+        if req.routing_exception is not None:
+            self.raise_routing_exception(req)
+        rule = req.url_rule
+        # if we provide automatic options for this URL and the
+        # request came with the OPTIONS method, reply automatically
+        if (
+            getattr(rule, "provide_automatic_options", False)
+            and req.method == "OPTIONS"
+        ):
+            return self.make_default_options_response()
+        # otherwise dispatch to the handler for that endpoint
+        return self.view_functions[rule.endpoint](**req.view_args)
+
+    def full_dispatch_request(self):
+        """Dispatches the request and on top of that performs request
+        pre and postprocessing as well as HTTP exception catching and
+        error handling.
+
+        .. versionadded:: 0.7
+        """
+        self.try_trigger_before_first_request_functions()
+        try:
+            request_started.send(self)
+            rv = self.preprocess_request()
+            if rv is None:
+                rv = self.dispatch_request()
+        except Exception as e:
+            rv = self.handle_user_exception(e)
+        return self.finalize_request(rv)
+
+    def finalize_request(self, rv, from_error_handler=False):
+        """Given the return value from a view function this finalizes
+        the request by converting it into a response and invoking the
+        postprocessing functions.  This is invoked for both normal
+        request dispatching as well as error handlers.
+
+        Because this means that it might be called as a result of a
+        failure a special safe mode is available which can be enabled
+        with the `from_error_handler` flag.  If enabled, failures in
+        response processing will be logged and otherwise ignored.
+
+        :internal:
+        """
+        response = self.make_response(rv)
+        try:
+            response = self.process_response(response)
+            request_finished.send(self, response=response)
+        except Exception:
+            if not from_error_handler:
+                raise
+            self.logger.exception(
+                "Request finalizing failed with an error while handling an error"
+            )
+        return response
+
+    def try_trigger_before_first_request_functions(self):
+        """Called before each request and will ensure that it triggers
+        the :attr:`before_first_request_funcs` and only exactly once per
+        application instance (which means process usually).
+
+        :internal:
+        """
+        if self._got_first_request:
+            return
+        with self._before_request_lock:
+            if self._got_first_request:
+                return
+            for func in self.before_first_request_funcs:
+                func()
+            self._got_first_request = True
+
+    def make_default_options_response(self):
+        """This method is called to create the default ``OPTIONS`` response.
+        This can be changed through subclassing to change the default
+        behavior of ``OPTIONS`` responses.
+
+        .. versionadded:: 0.7
+        """
+        adapter = _request_ctx_stack.top.url_adapter
+        if hasattr(adapter, "allowed_methods"):
+            methods = adapter.allowed_methods()
+        else:
+            # fallback for Werkzeug < 0.7
+            methods = []
+            try:
+                adapter.match(method="--")
+            except MethodNotAllowed as e:
+                methods = e.valid_methods
+            except HTTPException:
+                pass
+        rv = self.response_class()
+        rv.allow.update(methods)
+        return rv
+
+    def should_ignore_error(self, error):
+        """This is called to figure out if an error should be ignored
+        or not as far as the teardown system is concerned.  If this
+        function returns ``True`` then the teardown handlers will not be
+        passed the error.
+
+        .. versionadded:: 0.10
+        """
+        return False
+
+    def make_response(self, rv):
+        """Convert the return value from a view function to an instance of
+        :attr:`response_class`.
+
+        :param rv: the return value from the view function. The view function
+            must return a response. Returning ``None``, or the view ending
+            without returning, is not allowed. The following types are allowed
+            for ``view_rv``:
+
+            ``str`` (``unicode`` in Python 2)
+                A response object is created with the string encoded to UTF-8
+                as the body.
+
+            ``bytes`` (``str`` in Python 2)
+                A response object is created with the bytes as the body.
+
+            ``dict``
+                A dictionary that will be jsonify'd before being returned.
+
+            ``tuple``
+                Either ``(body, status, headers)``, ``(body, status)``, or
+                ``(body, headers)``, where ``body`` is any of the other types
+                allowed here, ``status`` is a string or an integer, and
+                ``headers`` is a dictionary or a list of ``(key, value)``
+                tuples. If ``body`` is a :attr:`response_class` instance,
+                ``status`` overwrites the exiting value and ``headers`` are
+                extended.
+
+            :attr:`response_class`
+                The object is returned unchanged.
+
+            other :class:`~werkzeug.wrappers.Response` class
+                The object is coerced to :attr:`response_class`.
+
+            :func:`callable`
+                The function is called as a WSGI application. The result is
+                used to create a response object.
+
+        .. versionchanged:: 0.9
+           Previously a tuple was interpreted as the arguments for the
+           response object.
+        """
+
+        status = headers = None
+
+        # unpack tuple returns
+        if isinstance(rv, tuple):
+            len_rv = len(rv)
+
+            # a 3-tuple is unpacked directly
+            if len_rv == 3:
+                rv, status, headers = rv
+            # decide if a 2-tuple has status or headers
+            elif len_rv == 2:
+                if isinstance(rv[1], (Headers, dict, tuple, list)):
+                    rv, headers = rv
+                else:
+                    rv, status = rv
+            # other sized tuples are not allowed
+            else:
+                raise TypeError(
+                    "The view function did not return a valid response tuple."
+                    " The tuple must have the form (body, status, headers),"
+                    " (body, status), or (body, headers)."
+                )
+
+        # the body must not be None
+        if rv is None:
+            raise TypeError(
+                "The view function did not return a valid response. The"
+                " function either returned None or ended without a return"
+                " statement."
+            )
+
+        # make sure the body is an instance of the response class
+        if not isinstance(rv, self.response_class):
+            if isinstance(rv, (text_type, bytes, bytearray)):
+                # let the response class set the status and headers instead of
+                # waiting to do it manually, so that the class can handle any
+                # special logic
+                rv = self.response_class(rv, status=status, headers=headers)
+                status = headers = None
+            elif isinstance(rv, dict):
+                rv = jsonify(rv)
+            elif isinstance(rv, BaseResponse) or callable(rv):
+                # evaluate a WSGI callable, or coerce a different response
+                # class to the correct type
+                try:
+                    rv = self.response_class.force_type(rv, request.environ)
+                except TypeError as e:
+                    new_error = TypeError(
+                        "{e}\nThe view function did not return a valid"
+                        " response. The return type must be a string, dict, tuple,"
+                        " Response instance, or WSGI callable, but it was a"
+                        " {rv.__class__.__name__}.".format(e=e, rv=rv)
+                    )
+                    reraise(TypeError, new_error, sys.exc_info()[2])
+            else:
+                raise TypeError(
+                    "The view function did not return a valid"
+                    " response. The return type must be a string, dict, tuple,"
+                    " Response instance, or WSGI callable, but it was a"
+                    " {rv.__class__.__name__}.".format(rv=rv)
+                )
+
+        # prefer the status if it was provided
+        if status is not None:
+            if isinstance(status, (text_type, bytes, bytearray)):
+                rv.status = status
+            else:
+                rv.status_code = status
+
+        # extend existing headers with provided headers
+        if headers:
+            rv.headers.extend(headers)
+
+        return rv
+
+    def create_url_adapter(self, request):
+        """Creates a URL adapter for the given request. The URL adapter
+        is created at a point where the request context is not yet set
+        up so the request is passed explicitly.
+
+        .. versionadded:: 0.6
+
+        .. versionchanged:: 0.9
+           This can now also be called without a request object when the
+           URL adapter is created for the application context.
+
+        .. versionchanged:: 1.0
+            :data:`SERVER_NAME` no longer implicitly enables subdomain
+            matching. Use :attr:`subdomain_matching` instead.
+        """
+        if request is not None:
+            # If subdomain matching is disabled (the default), use the
+            # default subdomain in all cases. This should be the default
+            # in Werkzeug but it currently does not have that feature.
+            subdomain = (
+                (self.url_map.default_subdomain or None)
+                if not self.subdomain_matching
+                else None
+            )
+            return self.url_map.bind_to_environ(
+                request.environ,
+                server_name=self.config["SERVER_NAME"],
+                subdomain=subdomain,
+            )
+        # We need at the very least the server name to be set for this
+        # to work.
+        if self.config["SERVER_NAME"] is not None:
+            return self.url_map.bind(
+                self.config["SERVER_NAME"],
+                script_name=self.config["APPLICATION_ROOT"],
+                url_scheme=self.config["PREFERRED_URL_SCHEME"],
+            )
+
+    def inject_url_defaults(self, endpoint, values):
+        """Injects the URL defaults for the given endpoint directly into
+        the values dictionary passed.  This is used internally and
+        automatically called on URL building.
+
+        .. versionadded:: 0.7
+        """
+        funcs = self.url_default_functions.get(None, ())
+        if "." in endpoint:
+            bp = endpoint.rsplit(".", 1)[0]
+            funcs = chain(funcs, self.url_default_functions.get(bp, ()))
+        for func in funcs:
+            func(endpoint, values)
+
+    def handle_url_build_error(self, error, endpoint, values):
+        """Handle :class:`~werkzeug.routing.BuildError` on :meth:`url_for`.
+        """
+        exc_type, exc_value, tb = sys.exc_info()
+        for handler in self.url_build_error_handlers:
+            try:
+                rv = handler(error, endpoint, values)
+                if rv is not None:
+                    return rv
+            except BuildError as e:
+                # make error available outside except block (py3)
+                error = e
+
+        # At this point we want to reraise the exception.  If the error is
+        # still the same one we can reraise it with the original traceback,
+        # otherwise we raise it from here.
+        if error is exc_value:
+            reraise(exc_type, exc_value, tb)
+        raise error
+
+    def preprocess_request(self):
+        """Called before the request is dispatched. Calls
+        :attr:`url_value_preprocessors` registered with the app and the
+        current blueprint (if any). Then calls :attr:`before_request_funcs`
+        registered with the app and the blueprint.
+
+        If any :meth:`before_request` handler returns a non-None value, the
+        value is handled as if it was the return value from the view, and
+        further request handling is stopped.
+        """
+
+        bp = _request_ctx_stack.top.request.blueprint
+
+        funcs = self.url_value_preprocessors.get(None, ())
+        if bp is not None and bp in self.url_value_preprocessors:
+            funcs = chain(funcs, self.url_value_preprocessors[bp])
+        for func in funcs:
+            func(request.endpoint, request.view_args)
+
+        funcs = self.before_request_funcs.get(None, ())
+        if bp is not None and bp in self.before_request_funcs:
+            funcs = chain(funcs, self.before_request_funcs[bp])
+        for func in funcs:
+            rv = func()
+            if rv is not None:
+                return rv
+
+    def process_response(self, response):
+        """Can be overridden in order to modify the response object
+        before it's sent to the WSGI server.  By default this will
+        call all the :meth:`after_request` decorated functions.
+
+        .. versionchanged:: 0.5
+           As of Flask 0.5 the functions registered for after request
+           execution are called in reverse order of registration.
+
+        :param response: a :attr:`response_class` object.
+        :return: a new response object or the same, has to be an
+                 instance of :attr:`response_class`.
+        """
+        ctx = _request_ctx_stack.top
+        bp = ctx.request.blueprint
+        funcs = ctx._after_request_functions
+        if bp is not None and bp in self.after_request_funcs:
+            funcs = chain(funcs, reversed(self.after_request_funcs[bp]))
+        if None in self.after_request_funcs:
+            funcs = chain(funcs, reversed(self.after_request_funcs[None]))
+        for handler in funcs:
+            response = handler(response)
+        if not self.session_interface.is_null_session(ctx.session):
+            self.session_interface.save_session(self, ctx.session, response)
+        return response
+
+    def do_teardown_request(self, exc=_sentinel):
+        """Called after the request is dispatched and the response is
+        returned, right before the request context is popped.
+
+        This calls all functions decorated with
+        :meth:`teardown_request`, and :meth:`Blueprint.teardown_request`
+        if a blueprint handled the request. Finally, the
+        :data:`request_tearing_down` signal is sent.
+
+        This is called by
+        :meth:`RequestContext.pop() <flask.ctx.RequestContext.pop>`,
+        which may be delayed during testing to maintain access to
+        resources.
+
+        :param exc: An unhandled exception raised while dispatching the
+            request. Detected from the current exception information if
+            not passed. Passed to each teardown function.
+
+        .. versionchanged:: 0.9
+            Added the ``exc`` argument.
+        """
+        if exc is _sentinel:
+            exc = sys.exc_info()[1]
+        funcs = reversed(self.teardown_request_funcs.get(None, ()))
+        bp = _request_ctx_stack.top.request.blueprint
+        if bp is not None and bp in self.teardown_request_funcs:
+            funcs = chain(funcs, reversed(self.teardown_request_funcs[bp]))
+        for func in funcs:
+            func(exc)
+        request_tearing_down.send(self, exc=exc)
+
+    def do_teardown_appcontext(self, exc=_sentinel):
+        """Called right before the application context is popped.
+
+        When handling a request, the application context is popped
+        after the request context. See :meth:`do_teardown_request`.
+
+        This calls all functions decorated with
+        :meth:`teardown_appcontext`. Then the
+        :data:`appcontext_tearing_down` signal is sent.
+
+        This is called by
+        :meth:`AppContext.pop() <flask.ctx.AppContext.pop>`.
+
+        .. versionadded:: 0.9
+        """
+        if exc is _sentinel:
+            exc = sys.exc_info()[1]
+        for func in reversed(self.teardown_appcontext_funcs):
+            func(exc)
+        appcontext_tearing_down.send(self, exc=exc)
+
+    def app_context(self):
+        """Create an :class:`~flask.ctx.AppContext`. Use as a ``with``
+        block to push the context, which will make :data:`current_app`
+        point at this application.
+
+        An application context is automatically pushed by
+        :meth:`RequestContext.push() <flask.ctx.RequestContext.push>`
+        when handling a request, and when running a CLI command. Use
+        this to manually create a context outside of these situations.
+
+        ::
+
+            with app.app_context():
+                init_db()
+
+        See :doc:`/appcontext`.
+
+        .. versionadded:: 0.9
+        """
+        return AppContext(self)
+
+    def request_context(self, environ):
+        """Create a :class:`~flask.ctx.RequestContext` representing a
+        WSGI environment. Use a ``with`` block to push the context,
+        which will make :data:`request` point at this request.
+
+        See :doc:`/reqcontext`.
+
+        Typically you should not call this from your own code. A request
+        context is automatically pushed by the :meth:`wsgi_app` when
+        handling a request. Use :meth:`test_request_context` to create
+        an environment and context instead of this method.
+
+        :param environ: a WSGI environment
+        """
+        return RequestContext(self, environ)
+
+    def test_request_context(self, *args, **kwargs):
+        """Create a :class:`~flask.ctx.RequestContext` for a WSGI
+        environment created from the given values. This is mostly useful
+        during testing, where you may want to run a function that uses
+        request data without dispatching a full request.
+
+        See :doc:`/reqcontext`.
+
+        Use a ``with`` block to push the context, which will make
+        :data:`request` point at the request for the created
+        environment. ::
+
+            with test_request_context(...):
+                generate_report()
+
+        When using the shell, it may be easier to push and pop the
+        context manually to avoid indentation. ::
+
+            ctx = app.test_request_context(...)
+            ctx.push()
+            ...
+            ctx.pop()
+
+        Takes the same arguments as Werkzeug's
+        :class:`~werkzeug.test.EnvironBuilder`, with some defaults from
+        the application. See the linked Werkzeug docs for most of the
+        available arguments. Flask-specific behavior is listed here.
+
+        :param path: URL path being requested.
+        :param base_url: Base URL where the app is being served, which
+            ``path`` is relative to. If not given, built from
+            :data:`PREFERRED_URL_SCHEME`, ``subdomain``,
+            :data:`SERVER_NAME`, and :data:`APPLICATION_ROOT`.
+        :param subdomain: Subdomain name to append to
+            :data:`SERVER_NAME`.
+        :param url_scheme: Scheme to use instead of
+            :data:`PREFERRED_URL_SCHEME`.
+        :param data: The request body, either as a string or a dict of
+            form keys and values.
+        :param json: If given, this is serialized as JSON and passed as
+            ``data``. Also defaults ``content_type`` to
+            ``application/json``.
+        :param args: other positional arguments passed to
+            :class:`~werkzeug.test.EnvironBuilder`.
+        :param kwargs: other keyword arguments passed to
+            :class:`~werkzeug.test.EnvironBuilder`.
+        """
+        from .testing import EnvironBuilder
+
+        builder = EnvironBuilder(self, *args, **kwargs)
+
+        try:
+            return self.request_context(builder.get_environ())
+        finally:
+            builder.close()
+
+    def wsgi_app(self, environ, start_response):
+        """The actual WSGI application. This is not implemented in
+        :meth:`__call__` so that middlewares can be applied without
+        losing a reference to the app object. Instead of doing this::
+
+            app = MyMiddleware(app)
+
+        It's a better idea to do this instead::
+
+            app.wsgi_app = MyMiddleware(app.wsgi_app)
+
+        Then you still have the original application object around and
+        can continue to call methods on it.
+
+        .. versionchanged:: 0.7
+            Teardown events for the request and app contexts are called
+            even if an unhandled error occurs. Other events may not be
+            called depending on when an error occurs during dispatch.
+            See :ref:`callbacks-and-errors`.
+
+        :param environ: A WSGI environment.
+        :param start_response: A callable accepting a status code,
+            a list of headers, and an optional exception context to
+            start the response.
+        """
+        ctx = self.request_context(environ)
+        error = None
+        try:
+            try:
+                ctx.push()
+                response = self.full_dispatch_request()
+            except Exception as e:
+                error = e
+                response = self.handle_exception(e)
+            except:  # noqa: B001
+                error = sys.exc_info()[1]
+                raise
+            return response(environ, start_response)
+        finally:
+            if self.should_ignore_error(error):
+                error = None
+            ctx.auto_pop(error)
+
+    def __call__(self, environ, start_response):
+        """The WSGI server calls the Flask application object as the
+        WSGI application. This calls :meth:`wsgi_app` which can be
+        wrapped to applying middleware."""
+        return self.wsgi_app(environ, start_response)
+
+    def __repr__(self):
+        return "<%s %r>" % (self.__class__.__name__, self.name)
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/blueprints.py b/python3-vckonline/lib/python3.8/site-packages/flask/blueprints.py
new file mode 100644
index 0000000..8978104
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/blueprints.py
@@ -0,0 +1,569 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.blueprints
+    ~~~~~~~~~~~~~~~~
+
+    Blueprints are the recommended way to implement larger or more
+    pluggable applications in Flask 0.7 and later.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+from functools import update_wrapper
+
+from .helpers import _endpoint_from_view_func
+from .helpers import _PackageBoundObject
+
+# a singleton sentinel value for parameter defaults
+_sentinel = object()
+
+
+class BlueprintSetupState(object):
+    """Temporary holder object for registering a blueprint with the
+    application.  An instance of this class is created by the
+    :meth:`~flask.Blueprint.make_setup_state` method and later passed
+    to all register callback functions.
+    """
+
+    def __init__(self, blueprint, app, options, first_registration):
+        #: a reference to the current application
+        self.app = app
+
+        #: a reference to the blueprint that created this setup state.
+        self.blueprint = blueprint
+
+        #: a dictionary with all options that were passed to the
+        #: :meth:`~flask.Flask.register_blueprint` method.
+        self.options = options
+
+        #: as blueprints can be registered multiple times with the
+        #: application and not everything wants to be registered
+        #: multiple times on it, this attribute can be used to figure
+        #: out if the blueprint was registered in the past already.
+        self.first_registration = first_registration
+
+        subdomain = self.options.get("subdomain")
+        if subdomain is None:
+            subdomain = self.blueprint.subdomain
+
+        #: The subdomain that the blueprint should be active for, ``None``
+        #: otherwise.
+        self.subdomain = subdomain
+
+        url_prefix = self.options.get("url_prefix")
+        if url_prefix is None:
+            url_prefix = self.blueprint.url_prefix
+        #: The prefix that should be used for all URLs defined on the
+        #: blueprint.
+        self.url_prefix = url_prefix
+
+        #: A dictionary with URL defaults that is added to each and every
+        #: URL that was defined with the blueprint.
+        self.url_defaults = dict(self.blueprint.url_values_defaults)
+        self.url_defaults.update(self.options.get("url_defaults", ()))
+
+    def add_url_rule(self, rule, endpoint=None, view_func=None, **options):
+        """A helper method to register a rule (and optionally a view function)
+        to the application.  The endpoint is automatically prefixed with the
+        blueprint's name.
+        """
+        if self.url_prefix is not None:
+            if rule:
+                rule = "/".join((self.url_prefix.rstrip("/"), rule.lstrip("/")))
+            else:
+                rule = self.url_prefix
+        options.setdefault("subdomain", self.subdomain)
+        if endpoint is None:
+            endpoint = _endpoint_from_view_func(view_func)
+        defaults = self.url_defaults
+        if "defaults" in options:
+            defaults = dict(defaults, **options.pop("defaults"))
+        self.app.add_url_rule(
+            rule,
+            "%s.%s" % (self.blueprint.name, endpoint),
+            view_func,
+            defaults=defaults,
+            **options
+        )
+
+
+class Blueprint(_PackageBoundObject):
+    """Represents a blueprint, a collection of routes and other
+    app-related functions that can be registered on a real application
+    later.
+
+    A blueprint is an object that allows defining application functions
+    without requiring an application object ahead of time. It uses the
+    same decorators as :class:`~flask.Flask`, but defers the need for an
+    application by recording them for later registration.
+
+    Decorating a function with a blueprint creates a deferred function
+    that is called with :class:`~flask.blueprints.BlueprintSetupState`
+    when the blueprint is registered on an application.
+
+    See :ref:`blueprints` for more information.
+
+    .. versionchanged:: 1.1.0
+        Blueprints have a ``cli`` group to register nested CLI commands.
+        The ``cli_group`` parameter controls the name of the group under
+        the ``flask`` command.
+
+    .. versionadded:: 0.7
+
+    :param name: The name of the blueprint. Will be prepended to each
+        endpoint name.
+    :param import_name: The name of the blueprint package, usually
+        ``__name__``. This helps locate the ``root_path`` for the
+        blueprint.
+    :param static_folder: A folder with static files that should be
+        served by the blueprint's static route. The path is relative to
+        the blueprint's root path. Blueprint static files are disabled
+        by default.
+    :param static_url_path: The url to serve static files from.
+        Defaults to ``static_folder``. If the blueprint does not have
+        a ``url_prefix``, the app's static route will take precedence,
+        and the blueprint's static files won't be accessible.
+    :param template_folder: A folder with templates that should be added
+        to the app's template search path. The path is relative to the
+        blueprint's root path. Blueprint templates are disabled by
+        default. Blueprint templates have a lower precedence than those
+        in the app's templates folder.
+    :param url_prefix: A path to prepend to all of the blueprint's URLs,
+        to make them distinct from the rest of the app's routes.
+    :param subdomain: A subdomain that blueprint routes will match on by
+        default.
+    :param url_defaults: A dict of default values that blueprint routes
+        will receive by default.
+    :param root_path: By default, the blueprint will automatically this
+        based on ``import_name``. In certain situations this automatic
+        detection can fail, so the path can be specified manually
+        instead.
+    """
+
+    warn_on_modifications = False
+    _got_registered_once = False
+
+    #: Blueprint local JSON decoder class to use.
+    #: Set to ``None`` to use the app's :class:`~flask.app.Flask.json_encoder`.
+    json_encoder = None
+    #: Blueprint local JSON decoder class to use.
+    #: Set to ``None`` to use the app's :class:`~flask.app.Flask.json_decoder`.
+    json_decoder = None
+
+    # TODO remove the next three attrs when Sphinx :inherited-members: works
+    # https://github.com/sphinx-doc/sphinx/issues/741
+
+    #: The name of the package or module that this app belongs to. Do not
+    #: change this once it is set by the constructor.
+    import_name = None
+
+    #: Location of the template files to be added to the template lookup.
+    #: ``None`` if templates should not be added.
+    template_folder = None
+
+    #: Absolute path to the package on the filesystem. Used to look up
+    #: resources contained in the package.
+    root_path = None
+
+    def __init__(
+        self,
+        name,
+        import_name,
+        static_folder=None,
+        static_url_path=None,
+        template_folder=None,
+        url_prefix=None,
+        subdomain=None,
+        url_defaults=None,
+        root_path=None,
+        cli_group=_sentinel,
+    ):
+        _PackageBoundObject.__init__(
+            self, import_name, template_folder, root_path=root_path
+        )
+        self.name = name
+        self.url_prefix = url_prefix
+        self.subdomain = subdomain
+        self.static_folder = static_folder
+        self.static_url_path = static_url_path
+        self.deferred_functions = []
+        if url_defaults is None:
+            url_defaults = {}
+        self.url_values_defaults = url_defaults
+        self.cli_group = cli_group
+
+    def record(self, func):
+        """Registers a function that is called when the blueprint is
+        registered on the application.  This function is called with the
+        state as argument as returned by the :meth:`make_setup_state`
+        method.
+        """
+        if self._got_registered_once and self.warn_on_modifications:
+            from warnings import warn
+
+            warn(
+                Warning(
+                    "The blueprint was already registered once "
+                    "but is getting modified now.  These changes "
+                    "will not show up."
+                )
+            )
+        self.deferred_functions.append(func)
+
+    def record_once(self, func):
+        """Works like :meth:`record` but wraps the function in another
+        function that will ensure the function is only called once.  If the
+        blueprint is registered a second time on the application, the
+        function passed is not called.
+        """
+
+        def wrapper(state):
+            if state.first_registration:
+                func(state)
+
+        return self.record(update_wrapper(wrapper, func))
+
+    def make_setup_state(self, app, options, first_registration=False):
+        """Creates an instance of :meth:`~flask.blueprints.BlueprintSetupState`
+        object that is later passed to the register callback functions.
+        Subclasses can override this to return a subclass of the setup state.
+        """
+        return BlueprintSetupState(self, app, options, first_registration)
+
+    def register(self, app, options, first_registration=False):
+        """Called by :meth:`Flask.register_blueprint` to register all views
+        and callbacks registered on the blueprint with the application. Creates
+        a :class:`.BlueprintSetupState` and calls each :meth:`record` callback
+        with it.
+
+        :param app: The application this blueprint is being registered with.
+        :param options: Keyword arguments forwarded from
+            :meth:`~Flask.register_blueprint`.
+        :param first_registration: Whether this is the first time this
+            blueprint has been registered on the application.
+        """
+        self._got_registered_once = True
+        state = self.make_setup_state(app, options, first_registration)
+
+        if self.has_static_folder:
+            state.add_url_rule(
+                self.static_url_path + "/<path:filename>",
+                view_func=self.send_static_file,
+                endpoint="static",
+            )
+
+        for deferred in self.deferred_functions:
+            deferred(state)
+
+        cli_resolved_group = options.get("cli_group", self.cli_group)
+
+        if not self.cli.commands:
+            return
+
+        if cli_resolved_group is None:
+            app.cli.commands.update(self.cli.commands)
+        elif cli_resolved_group is _sentinel:
+            self.cli.name = self.name
+            app.cli.add_command(self.cli)
+        else:
+            self.cli.name = cli_resolved_group
+            app.cli.add_command(self.cli)
+
+    def route(self, rule, **options):
+        """Like :meth:`Flask.route` but for a blueprint.  The endpoint for the
+        :func:`url_for` function is prefixed with the name of the blueprint.
+        """
+
+        def decorator(f):
+            endpoint = options.pop("endpoint", f.__name__)
+            self.add_url_rule(rule, endpoint, f, **options)
+            return f
+
+        return decorator
+
+    def add_url_rule(self, rule, endpoint=None, view_func=None, **options):
+        """Like :meth:`Flask.add_url_rule` but for a blueprint.  The endpoint for
+        the :func:`url_for` function is prefixed with the name of the blueprint.
+        """
+        if endpoint:
+            assert "." not in endpoint, "Blueprint endpoints should not contain dots"
+        if view_func and hasattr(view_func, "__name__"):
+            assert (
+                "." not in view_func.__name__
+            ), "Blueprint view function name should not contain dots"
+        self.record(lambda s: s.add_url_rule(rule, endpoint, view_func, **options))
+
+    def endpoint(self, endpoint):
+        """Like :meth:`Flask.endpoint` but for a blueprint.  This does not
+        prefix the endpoint with the blueprint name, this has to be done
+        explicitly by the user of this method.  If the endpoint is prefixed
+        with a `.` it will be registered to the current blueprint, otherwise
+        it's an application independent endpoint.
+        """
+
+        def decorator(f):
+            def register_endpoint(state):
+                state.app.view_functions[endpoint] = f
+
+            self.record_once(register_endpoint)
+            return f
+
+        return decorator
+
+    def app_template_filter(self, name=None):
+        """Register a custom template filter, available application wide.  Like
+        :meth:`Flask.template_filter` but for a blueprint.
+
+        :param name: the optional name of the filter, otherwise the
+                     function name will be used.
+        """
+
+        def decorator(f):
+            self.add_app_template_filter(f, name=name)
+            return f
+
+        return decorator
+
+    def add_app_template_filter(self, f, name=None):
+        """Register a custom template filter, available application wide.  Like
+        :meth:`Flask.add_template_filter` but for a blueprint.  Works exactly
+        like the :meth:`app_template_filter` decorator.
+
+        :param name: the optional name of the filter, otherwise the
+                     function name will be used.
+        """
+
+        def register_template(state):
+            state.app.jinja_env.filters[name or f.__name__] = f
+
+        self.record_once(register_template)
+
+    def app_template_test(self, name=None):
+        """Register a custom template test, available application wide.  Like
+        :meth:`Flask.template_test` but for a blueprint.
+
+        .. versionadded:: 0.10
+
+        :param name: the optional name of the test, otherwise the
+                     function name will be used.
+        """
+
+        def decorator(f):
+            self.add_app_template_test(f, name=name)
+            return f
+
+        return decorator
+
+    def add_app_template_test(self, f, name=None):
+        """Register a custom template test, available application wide.  Like
+        :meth:`Flask.add_template_test` but for a blueprint.  Works exactly
+        like the :meth:`app_template_test` decorator.
+
+        .. versionadded:: 0.10
+
+        :param name: the optional name of the test, otherwise the
+                     function name will be used.
+        """
+
+        def register_template(state):
+            state.app.jinja_env.tests[name or f.__name__] = f
+
+        self.record_once(register_template)
+
+    def app_template_global(self, name=None):
+        """Register a custom template global, available application wide.  Like
+        :meth:`Flask.template_global` but for a blueprint.
+
+        .. versionadded:: 0.10
+
+        :param name: the optional name of the global, otherwise the
+                     function name will be used.
+        """
+
+        def decorator(f):
+            self.add_app_template_global(f, name=name)
+            return f
+
+        return decorator
+
+    def add_app_template_global(self, f, name=None):
+        """Register a custom template global, available application wide.  Like
+        :meth:`Flask.add_template_global` but for a blueprint.  Works exactly
+        like the :meth:`app_template_global` decorator.
+
+        .. versionadded:: 0.10
+
+        :param name: the optional name of the global, otherwise the
+                     function name will be used.
+        """
+
+        def register_template(state):
+            state.app.jinja_env.globals[name or f.__name__] = f
+
+        self.record_once(register_template)
+
+    def before_request(self, f):
+        """Like :meth:`Flask.before_request` but for a blueprint.  This function
+        is only executed before each request that is handled by a function of
+        that blueprint.
+        """
+        self.record_once(
+            lambda s: s.app.before_request_funcs.setdefault(self.name, []).append(f)
+        )
+        return f
+
+    def before_app_request(self, f):
+        """Like :meth:`Flask.before_request`.  Such a function is executed
+        before each request, even if outside of a blueprint.
+        """
+        self.record_once(
+            lambda s: s.app.before_request_funcs.setdefault(None, []).append(f)
+        )
+        return f
+
+    def before_app_first_request(self, f):
+        """Like :meth:`Flask.before_first_request`.  Such a function is
+        executed before the first request to the application.
+        """
+        self.record_once(lambda s: s.app.before_first_request_funcs.append(f))
+        return f
+
+    def after_request(self, f):
+        """Like :meth:`Flask.after_request` but for a blueprint.  This function
+        is only executed after each request that is handled by a function of
+        that blueprint.
+        """
+        self.record_once(
+            lambda s: s.app.after_request_funcs.setdefault(self.name, []).append(f)
+        )
+        return f
+
+    def after_app_request(self, f):
+        """Like :meth:`Flask.after_request` but for a blueprint.  Such a function
+        is executed after each request, even if outside of the blueprint.
+        """
+        self.record_once(
+            lambda s: s.app.after_request_funcs.setdefault(None, []).append(f)
+        )
+        return f
+
+    def teardown_request(self, f):
+        """Like :meth:`Flask.teardown_request` but for a blueprint.  This
+        function is only executed when tearing down requests handled by a
+        function of that blueprint.  Teardown request functions are executed
+        when the request context is popped, even when no actual request was
+        performed.
+        """
+        self.record_once(
+            lambda s: s.app.teardown_request_funcs.setdefault(self.name, []).append(f)
+        )
+        return f
+
+    def teardown_app_request(self, f):
+        """Like :meth:`Flask.teardown_request` but for a blueprint.  Such a
+        function is executed when tearing down each request, even if outside of
+        the blueprint.
+        """
+        self.record_once(
+            lambda s: s.app.teardown_request_funcs.setdefault(None, []).append(f)
+        )
+        return f
+
+    def context_processor(self, f):
+        """Like :meth:`Flask.context_processor` but for a blueprint.  This
+        function is only executed for requests handled by a blueprint.
+        """
+        self.record_once(
+            lambda s: s.app.template_context_processors.setdefault(
+                self.name, []
+            ).append(f)
+        )
+        return f
+
+    def app_context_processor(self, f):
+        """Like :meth:`Flask.context_processor` but for a blueprint.  Such a
+        function is executed each request, even if outside of the blueprint.
+        """
+        self.record_once(
+            lambda s: s.app.template_context_processors.setdefault(None, []).append(f)
+        )
+        return f
+
+    def app_errorhandler(self, code):
+        """Like :meth:`Flask.errorhandler` but for a blueprint.  This
+        handler is used for all requests, even if outside of the blueprint.
+        """
+
+        def decorator(f):
+            self.record_once(lambda s: s.app.errorhandler(code)(f))
+            return f
+
+        return decorator
+
+    def url_value_preprocessor(self, f):
+        """Registers a function as URL value preprocessor for this
+        blueprint.  It's called before the view functions are called and
+        can modify the url values provided.
+        """
+        self.record_once(
+            lambda s: s.app.url_value_preprocessors.setdefault(self.name, []).append(f)
+        )
+        return f
+
+    def url_defaults(self, f):
+        """Callback function for URL defaults for this blueprint.  It's called
+        with the endpoint and values and should update the values passed
+        in place.
+        """
+        self.record_once(
+            lambda s: s.app.url_default_functions.setdefault(self.name, []).append(f)
+        )
+        return f
+
+    def app_url_value_preprocessor(self, f):
+        """Same as :meth:`url_value_preprocessor` but application wide.
+        """
+        self.record_once(
+            lambda s: s.app.url_value_preprocessors.setdefault(None, []).append(f)
+        )
+        return f
+
+    def app_url_defaults(self, f):
+        """Same as :meth:`url_defaults` but application wide.
+        """
+        self.record_once(
+            lambda s: s.app.url_default_functions.setdefault(None, []).append(f)
+        )
+        return f
+
+    def errorhandler(self, code_or_exception):
+        """Registers an error handler that becomes active for this blueprint
+        only.  Please be aware that routing does not happen local to a
+        blueprint so an error handler for 404 usually is not handled by
+        a blueprint unless it is caused inside a view function.  Another
+        special case is the 500 internal server error which is always looked
+        up from the application.
+
+        Otherwise works as the :meth:`~flask.Flask.errorhandler` decorator
+        of the :class:`~flask.Flask` object.
+        """
+
+        def decorator(f):
+            self.record_once(
+                lambda s: s.app._register_error_handler(self.name, code_or_exception, f)
+            )
+            return f
+
+        return decorator
+
+    def register_error_handler(self, code_or_exception, f):
+        """Non-decorator version of the :meth:`errorhandler` error attach
+        function, akin to the :meth:`~flask.Flask.register_error_handler`
+        application-wide function of the :class:`~flask.Flask` object but
+        for error handlers limited to this blueprint.
+
+        .. versionadded:: 0.11
+        """
+        self.record_once(
+            lambda s: s.app._register_error_handler(self.name, code_or_exception, f)
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/cli.py b/python3-vckonline/lib/python3.8/site-packages/flask/cli.py
new file mode 100644
index 0000000..c09b2cd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/cli.py
@@ -0,0 +1,971 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.cli
+    ~~~~~~~~~
+
+    A simple command line application to run flask apps.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+from __future__ import print_function
+
+import ast
+import inspect
+import os
+import platform
+import re
+import sys
+import traceback
+from functools import update_wrapper
+from operator import attrgetter
+from threading import Lock
+from threading import Thread
+
+import click
+from werkzeug.utils import import_string
+
+from ._compat import getargspec
+from ._compat import itervalues
+from ._compat import reraise
+from ._compat import text_type
+from .globals import current_app
+from .helpers import get_debug_flag
+from .helpers import get_env
+from .helpers import get_load_dotenv
+
+try:
+    import dotenv
+except ImportError:
+    dotenv = None
+
+try:
+    import ssl
+except ImportError:
+    ssl = None
+
+
+class NoAppException(click.UsageError):
+    """Raised if an application cannot be found or loaded."""
+
+
+def find_best_app(script_info, module):
+    """Given a module instance this tries to find the best possible
+    application in the module or raises an exception.
+    """
+    from . import Flask
+
+    # Search for the most common names first.
+    for attr_name in ("app", "application"):
+        app = getattr(module, attr_name, None)
+
+        if isinstance(app, Flask):
+            return app
+
+    # Otherwise find the only object that is a Flask instance.
+    matches = [v for v in itervalues(module.__dict__) if isinstance(v, Flask)]
+
+    if len(matches) == 1:
+        return matches[0]
+    elif len(matches) > 1:
+        raise NoAppException(
+            'Detected multiple Flask applications in module "{module}". Use '
+            '"FLASK_APP={module}:name" to specify the correct '
+            "one.".format(module=module.__name__)
+        )
+
+    # Search for app factory functions.
+    for attr_name in ("create_app", "make_app"):
+        app_factory = getattr(module, attr_name, None)
+
+        if inspect.isfunction(app_factory):
+            try:
+                app = call_factory(script_info, app_factory)
+
+                if isinstance(app, Flask):
+                    return app
+            except TypeError:
+                if not _called_with_wrong_args(app_factory):
+                    raise
+                raise NoAppException(
+                    'Detected factory "{factory}" in module "{module}", but '
+                    "could not call it without arguments. Use "
+                    "\"FLASK_APP='{module}:{factory}(args)'\" to specify "
+                    "arguments.".format(factory=attr_name, module=module.__name__)
+                )
+
+    raise NoAppException(
+        'Failed to find Flask application or factory in module "{module}". '
+        'Use "FLASK_APP={module}:name to specify one.'.format(module=module.__name__)
+    )
+
+
+def call_factory(script_info, app_factory, arguments=()):
+    """Takes an app factory, a ``script_info` object and  optionally a tuple
+    of arguments. Checks for the existence of a script_info argument and calls
+    the app_factory depending on that and the arguments provided.
+    """
+    args_spec = getargspec(app_factory)
+    arg_names = args_spec.args
+    arg_defaults = args_spec.defaults
+
+    if "script_info" in arg_names:
+        return app_factory(*arguments, script_info=script_info)
+    elif arguments:
+        return app_factory(*arguments)
+    elif not arguments and len(arg_names) == 1 and arg_defaults is None:
+        return app_factory(script_info)
+
+    return app_factory()
+
+
+def _called_with_wrong_args(factory):
+    """Check whether calling a function raised a ``TypeError`` because
+    the call failed or because something in the factory raised the
+    error.
+
+    :param factory: the factory function that was called
+    :return: true if the call failed
+    """
+    tb = sys.exc_info()[2]
+
+    try:
+        while tb is not None:
+            if tb.tb_frame.f_code is factory.__code__:
+                # in the factory, it was called successfully
+                return False
+
+            tb = tb.tb_next
+
+        # didn't reach the factory
+        return True
+    finally:
+        # explicitly delete tb as it is circular referenced
+        # https://docs.python.org/2/library/sys.html#sys.exc_info
+        del tb
+
+
+def find_app_by_string(script_info, module, app_name):
+    """Checks if the given string is a variable name or a function. If it is a
+    function, it checks for specified arguments and whether it takes a
+    ``script_info`` argument and calls the function with the appropriate
+    arguments.
+    """
+    from . import Flask
+
+    match = re.match(r"^ *([^ ()]+) *(?:\((.*?) *,? *\))? *$", app_name)
+
+    if not match:
+        raise NoAppException(
+            '"{name}" is not a valid variable name or function '
+            "expression.".format(name=app_name)
+        )
+
+    name, args = match.groups()
+
+    try:
+        attr = getattr(module, name)
+    except AttributeError as e:
+        raise NoAppException(e.args[0])
+
+    if inspect.isfunction(attr):
+        if args:
+            try:
+                args = ast.literal_eval("({args},)".format(args=args))
+            except (ValueError, SyntaxError) as e:
+                raise NoAppException(
+                    "Could not parse the arguments in "
+                    '"{app_name}".'.format(e=e, app_name=app_name)
+                )
+        else:
+            args = ()
+
+        try:
+            app = call_factory(script_info, attr, args)
+        except TypeError as e:
+            if not _called_with_wrong_args(attr):
+                raise
+
+            raise NoAppException(
+                '{e}\nThe factory "{app_name}" in module "{module}" could not '
+                "be called with the specified arguments.".format(
+                    e=e, app_name=app_name, module=module.__name__
+                )
+            )
+    else:
+        app = attr
+
+    if isinstance(app, Flask):
+        return app
+
+    raise NoAppException(
+        "A valid Flask application was not obtained from "
+        '"{module}:{app_name}".'.format(module=module.__name__, app_name=app_name)
+    )
+
+
+def prepare_import(path):
+    """Given a filename this will try to calculate the python path, add it
+    to the search path and return the actual module name that is expected.
+    """
+    path = os.path.realpath(path)
+
+    fname, ext = os.path.splitext(path)
+    if ext == ".py":
+        path = fname
+
+    if os.path.basename(path) == "__init__":
+        path = os.path.dirname(path)
+
+    module_name = []
+
+    # move up until outside package structure (no __init__.py)
+    while True:
+        path, name = os.path.split(path)
+        module_name.append(name)
+
+        if not os.path.exists(os.path.join(path, "__init__.py")):
+            break
+
+    if sys.path[0] != path:
+        sys.path.insert(0, path)
+
+    return ".".join(module_name[::-1])
+
+
+def locate_app(script_info, module_name, app_name, raise_if_not_found=True):
+    __traceback_hide__ = True  # noqa: F841
+
+    try:
+        __import__(module_name)
+    except ImportError:
+        # Reraise the ImportError if it occurred within the imported module.
+        # Determine this by checking whether the trace has a depth > 1.
+        if sys.exc_info()[-1].tb_next:
+            raise NoAppException(
+                'While importing "{name}", an ImportError was raised:'
+                "\n\n{tb}".format(name=module_name, tb=traceback.format_exc())
+            )
+        elif raise_if_not_found:
+            raise NoAppException('Could not import "{name}".'.format(name=module_name))
+        else:
+            return
+
+    module = sys.modules[module_name]
+
+    if app_name is None:
+        return find_best_app(script_info, module)
+    else:
+        return find_app_by_string(script_info, module, app_name)
+
+
+def get_version(ctx, param, value):
+    if not value or ctx.resilient_parsing:
+        return
+
+    import werkzeug
+    from . import __version__
+
+    message = "Python %(python)s\nFlask %(flask)s\nWerkzeug %(werkzeug)s"
+    click.echo(
+        message
+        % {
+            "python": platform.python_version(),
+            "flask": __version__,
+            "werkzeug": werkzeug.__version__,
+        },
+        color=ctx.color,
+    )
+    ctx.exit()
+
+
+version_option = click.Option(
+    ["--version"],
+    help="Show the flask version",
+    expose_value=False,
+    callback=get_version,
+    is_flag=True,
+    is_eager=True,
+)
+
+
+class DispatchingApp(object):
+    """Special application that dispatches to a Flask application which
+    is imported by name in a background thread.  If an error happens
+    it is recorded and shown as part of the WSGI handling which in case
+    of the Werkzeug debugger means that it shows up in the browser.
+    """
+
+    def __init__(self, loader, use_eager_loading=False):
+        self.loader = loader
+        self._app = None
+        self._lock = Lock()
+        self._bg_loading_exc_info = None
+        if use_eager_loading:
+            self._load_unlocked()
+        else:
+            self._load_in_background()
+
+    def _load_in_background(self):
+        def _load_app():
+            __traceback_hide__ = True  # noqa: F841
+            with self._lock:
+                try:
+                    self._load_unlocked()
+                except Exception:
+                    self._bg_loading_exc_info = sys.exc_info()
+
+        t = Thread(target=_load_app, args=())
+        t.start()
+
+    def _flush_bg_loading_exception(self):
+        __traceback_hide__ = True  # noqa: F841
+        exc_info = self._bg_loading_exc_info
+        if exc_info is not None:
+            self._bg_loading_exc_info = None
+            reraise(*exc_info)
+
+    def _load_unlocked(self):
+        __traceback_hide__ = True  # noqa: F841
+        self._app = rv = self.loader()
+        self._bg_loading_exc_info = None
+        return rv
+
+    def __call__(self, environ, start_response):
+        __traceback_hide__ = True  # noqa: F841
+        if self._app is not None:
+            return self._app(environ, start_response)
+        self._flush_bg_loading_exception()
+        with self._lock:
+            if self._app is not None:
+                rv = self._app
+            else:
+                rv = self._load_unlocked()
+            return rv(environ, start_response)
+
+
+class ScriptInfo(object):
+    """Helper object to deal with Flask applications.  This is usually not
+    necessary to interface with as it's used internally in the dispatching
+    to click.  In future versions of Flask this object will most likely play
+    a bigger role.  Typically it's created automatically by the
+    :class:`FlaskGroup` but you can also manually create it and pass it
+    onwards as click object.
+    """
+
+    def __init__(self, app_import_path=None, create_app=None, set_debug_flag=True):
+        #: Optionally the import path for the Flask application.
+        self.app_import_path = app_import_path or os.environ.get("FLASK_APP")
+        #: Optionally a function that is passed the script info to create
+        #: the instance of the application.
+        self.create_app = create_app
+        #: A dictionary with arbitrary data that can be associated with
+        #: this script info.
+        self.data = {}
+        self.set_debug_flag = set_debug_flag
+        self._loaded_app = None
+
+    def load_app(self):
+        """Loads the Flask app (if not yet loaded) and returns it.  Calling
+        this multiple times will just result in the already loaded app to
+        be returned.
+        """
+        __traceback_hide__ = True  # noqa: F841
+
+        if self._loaded_app is not None:
+            return self._loaded_app
+
+        app = None
+
+        if self.create_app is not None:
+            app = call_factory(self, self.create_app)
+        else:
+            if self.app_import_path:
+                path, name = (
+                    re.split(r":(?![\\/])", self.app_import_path, 1) + [None]
+                )[:2]
+                import_name = prepare_import(path)
+                app = locate_app(self, import_name, name)
+            else:
+                for path in ("wsgi.py", "app.py"):
+                    import_name = prepare_import(path)
+                    app = locate_app(self, import_name, None, raise_if_not_found=False)
+
+                    if app:
+                        break
+
+        if not app:
+            raise NoAppException(
+                "Could not locate a Flask application. You did not provide "
+                'the "FLASK_APP" environment variable, and a "wsgi.py" or '
+                '"app.py" module was not found in the current directory.'
+            )
+
+        if self.set_debug_flag:
+            # Update the app's debug flag through the descriptor so that
+            # other values repopulate as well.
+            app.debug = get_debug_flag()
+
+        self._loaded_app = app
+        return app
+
+
+pass_script_info = click.make_pass_decorator(ScriptInfo, ensure=True)
+
+
+def with_appcontext(f):
+    """Wraps a callback so that it's guaranteed to be executed with the
+    script's application context.  If callbacks are registered directly
+    to the ``app.cli`` object then they are wrapped with this function
+    by default unless it's disabled.
+    """
+
+    @click.pass_context
+    def decorator(__ctx, *args, **kwargs):
+        with __ctx.ensure_object(ScriptInfo).load_app().app_context():
+            return __ctx.invoke(f, *args, **kwargs)
+
+    return update_wrapper(decorator, f)
+
+
+class AppGroup(click.Group):
+    """This works similar to a regular click :class:`~click.Group` but it
+    changes the behavior of the :meth:`command` decorator so that it
+    automatically wraps the functions in :func:`with_appcontext`.
+
+    Not to be confused with :class:`FlaskGroup`.
+    """
+
+    def command(self, *args, **kwargs):
+        """This works exactly like the method of the same name on a regular
+        :class:`click.Group` but it wraps callbacks in :func:`with_appcontext`
+        unless it's disabled by passing ``with_appcontext=False``.
+        """
+        wrap_for_ctx = kwargs.pop("with_appcontext", True)
+
+        def decorator(f):
+            if wrap_for_ctx:
+                f = with_appcontext(f)
+            return click.Group.command(self, *args, **kwargs)(f)
+
+        return decorator
+
+    def group(self, *args, **kwargs):
+        """This works exactly like the method of the same name on a regular
+        :class:`click.Group` but it defaults the group class to
+        :class:`AppGroup`.
+        """
+        kwargs.setdefault("cls", AppGroup)
+        return click.Group.group(self, *args, **kwargs)
+
+
+class FlaskGroup(AppGroup):
+    """Special subclass of the :class:`AppGroup` group that supports
+    loading more commands from the configured Flask app.  Normally a
+    developer does not have to interface with this class but there are
+    some very advanced use cases for which it makes sense to create an
+    instance of this.
+
+    For information as of why this is useful see :ref:`custom-scripts`.
+
+    :param add_default_commands: if this is True then the default run and
+        shell commands will be added.
+    :param add_version_option: adds the ``--version`` option.
+    :param create_app: an optional callback that is passed the script info and
+        returns the loaded app.
+    :param load_dotenv: Load the nearest :file:`.env` and :file:`.flaskenv`
+        files to set environment variables. Will also change the working
+        directory to the directory containing the first file found.
+    :param set_debug_flag: Set the app's debug flag based on the active
+        environment
+
+    .. versionchanged:: 1.0
+        If installed, python-dotenv will be used to load environment variables
+        from :file:`.env` and :file:`.flaskenv` files.
+    """
+
+    def __init__(
+        self,
+        add_default_commands=True,
+        create_app=None,
+        add_version_option=True,
+        load_dotenv=True,
+        set_debug_flag=True,
+        **extra
+    ):
+        params = list(extra.pop("params", None) or ())
+
+        if add_version_option:
+            params.append(version_option)
+
+        AppGroup.__init__(self, params=params, **extra)
+        self.create_app = create_app
+        self.load_dotenv = load_dotenv
+        self.set_debug_flag = set_debug_flag
+
+        if add_default_commands:
+            self.add_command(run_command)
+            self.add_command(shell_command)
+            self.add_command(routes_command)
+
+        self._loaded_plugin_commands = False
+
+    def _load_plugin_commands(self):
+        if self._loaded_plugin_commands:
+            return
+        try:
+            import pkg_resources
+        except ImportError:
+            self._loaded_plugin_commands = True
+            return
+
+        for ep in pkg_resources.iter_entry_points("flask.commands"):
+            self.add_command(ep.load(), ep.name)
+        self._loaded_plugin_commands = True
+
+    def get_command(self, ctx, name):
+        self._load_plugin_commands()
+
+        # We load built-in commands first as these should always be the
+        # same no matter what the app does.  If the app does want to
+        # override this it needs to make a custom instance of this group
+        # and not attach the default commands.
+        #
+        # This also means that the script stays functional in case the
+        # application completely fails.
+        rv = AppGroup.get_command(self, ctx, name)
+        if rv is not None:
+            return rv
+
+        info = ctx.ensure_object(ScriptInfo)
+        try:
+            rv = info.load_app().cli.get_command(ctx, name)
+            if rv is not None:
+                return rv
+        except NoAppException:
+            pass
+
+    def list_commands(self, ctx):
+        self._load_plugin_commands()
+
+        # The commands available is the list of both the application (if
+        # available) plus the builtin commands.
+        rv = set(click.Group.list_commands(self, ctx))
+        info = ctx.ensure_object(ScriptInfo)
+        try:
+            rv.update(info.load_app().cli.list_commands(ctx))
+        except Exception:
+            # Here we intentionally swallow all exceptions as we don't
+            # want the help page to break if the app does not exist.
+            # If someone attempts to use the command we try to create
+            # the app again and this will give us the error.
+            # However, we will not do so silently because that would confuse
+            # users.
+            traceback.print_exc()
+        return sorted(rv)
+
+    def main(self, *args, **kwargs):
+        # Set a global flag that indicates that we were invoked from the
+        # command line interface. This is detected by Flask.run to make the
+        # call into a no-op. This is necessary to avoid ugly errors when the
+        # script that is loaded here also attempts to start a server.
+        os.environ["FLASK_RUN_FROM_CLI"] = "true"
+
+        if get_load_dotenv(self.load_dotenv):
+            load_dotenv()
+
+        obj = kwargs.get("obj")
+
+        if obj is None:
+            obj = ScriptInfo(
+                create_app=self.create_app, set_debug_flag=self.set_debug_flag
+            )
+
+        kwargs["obj"] = obj
+        kwargs.setdefault("auto_envvar_prefix", "FLASK")
+        return super(FlaskGroup, self).main(*args, **kwargs)
+
+
+def _path_is_ancestor(path, other):
+    """Take ``other`` and remove the length of ``path`` from it. Then join it
+    to ``path``. If it is the original value, ``path`` is an ancestor of
+    ``other``."""
+    return os.path.join(path, other[len(path) :].lstrip(os.sep)) == other
+
+
+def load_dotenv(path=None):
+    """Load "dotenv" files in order of precedence to set environment variables.
+
+    If an env var is already set it is not overwritten, so earlier files in the
+    list are preferred over later files.
+
+    Changes the current working directory to the location of the first file
+    found, with the assumption that it is in the top level project directory
+    and will be where the Python path should import local packages from.
+
+    This is a no-op if `python-dotenv`_ is not installed.
+
+    .. _python-dotenv: https://github.com/theskumar/python-dotenv#readme
+
+    :param path: Load the file at this location instead of searching.
+    :return: ``True`` if a file was loaded.
+
+    .. versionchanged:: 1.1.0
+        Returns ``False`` when python-dotenv is not installed, or when
+        the given path isn't a file.
+
+    .. versionadded:: 1.0
+    """
+    if dotenv is None:
+        if path or os.path.isfile(".env") or os.path.isfile(".flaskenv"):
+            click.secho(
+                " * Tip: There are .env or .flaskenv files present."
+                ' Do "pip install python-dotenv" to use them.',
+                fg="yellow",
+                err=True,
+            )
+
+        return False
+
+    # if the given path specifies the actual file then return True,
+    # else False
+    if path is not None:
+        if os.path.isfile(path):
+            return dotenv.load_dotenv(path)
+
+        return False
+
+    new_dir = None
+
+    for name in (".env", ".flaskenv"):
+        path = dotenv.find_dotenv(name, usecwd=True)
+
+        if not path:
+            continue
+
+        if new_dir is None:
+            new_dir = os.path.dirname(path)
+
+        dotenv.load_dotenv(path)
+
+    if new_dir and os.getcwd() != new_dir:
+        os.chdir(new_dir)
+
+    return new_dir is not None  # at least one file was located and loaded
+
+
+def show_server_banner(env, debug, app_import_path, eager_loading):
+    """Show extra startup messages the first time the server is run,
+    ignoring the reloader.
+    """
+    if os.environ.get("WERKZEUG_RUN_MAIN") == "true":
+        return
+
+    if app_import_path is not None:
+        message = ' * Serving Flask app "{0}"'.format(app_import_path)
+
+        if not eager_loading:
+            message += " (lazy loading)"
+
+        click.echo(message)
+
+    click.echo(" * Environment: {0}".format(env))
+
+    if env == "production":
+        click.secho(
+            "   WARNING: This is a development server. "
+            "Do not use it in a production deployment.",
+            fg="red",
+        )
+        click.secho("   Use a production WSGI server instead.", dim=True)
+
+    if debug is not None:
+        click.echo(" * Debug mode: {0}".format("on" if debug else "off"))
+
+
+class CertParamType(click.ParamType):
+    """Click option type for the ``--cert`` option. Allows either an
+    existing file, the string ``'adhoc'``, or an import for a
+    :class:`~ssl.SSLContext` object.
+    """
+
+    name = "path"
+
+    def __init__(self):
+        self.path_type = click.Path(exists=True, dir_okay=False, resolve_path=True)
+
+    def convert(self, value, param, ctx):
+        if ssl is None:
+            raise click.BadParameter(
+                'Using "--cert" requires Python to be compiled with SSL support.',
+                ctx,
+                param,
+            )
+
+        try:
+            return self.path_type(value, param, ctx)
+        except click.BadParameter:
+            value = click.STRING(value, param, ctx).lower()
+
+            if value == "adhoc":
+                try:
+                    import OpenSSL  # noqa: F401
+                except ImportError:
+                    raise click.BadParameter(
+                        "Using ad-hoc certificates requires pyOpenSSL.", ctx, param
+                    )
+
+                return value
+
+            obj = import_string(value, silent=True)
+
+            if sys.version_info < (2, 7, 9):
+                if obj:
+                    return obj
+            else:
+                if isinstance(obj, ssl.SSLContext):
+                    return obj
+
+            raise
+
+
+def _validate_key(ctx, param, value):
+    """The ``--key`` option must be specified when ``--cert`` is a file.
+    Modifies the ``cert`` param to be a ``(cert, key)`` pair if needed.
+    """
+    cert = ctx.params.get("cert")
+    is_adhoc = cert == "adhoc"
+
+    if sys.version_info < (2, 7, 9):
+        is_context = cert and not isinstance(cert, (text_type, bytes))
+    else:
+        is_context = isinstance(cert, ssl.SSLContext)
+
+    if value is not None:
+        if is_adhoc:
+            raise click.BadParameter(
+                'When "--cert" is "adhoc", "--key" is not used.', ctx, param
+            )
+
+        if is_context:
+            raise click.BadParameter(
+                'When "--cert" is an SSLContext object, "--key is not used.', ctx, param
+            )
+
+        if not cert:
+            raise click.BadParameter('"--cert" must also be specified.', ctx, param)
+
+        ctx.params["cert"] = cert, value
+
+    else:
+        if cert and not (is_adhoc or is_context):
+            raise click.BadParameter('Required when using "--cert".', ctx, param)
+
+    return value
+
+
+class SeparatedPathType(click.Path):
+    """Click option type that accepts a list of values separated by the
+    OS's path separator (``:``, ``;`` on Windows). Each value is
+    validated as a :class:`click.Path` type.
+    """
+
+    def convert(self, value, param, ctx):
+        items = self.split_envvar_value(value)
+        super_convert = super(SeparatedPathType, self).convert
+        return [super_convert(item, param, ctx) for item in items]
+
+
+@click.command("run", short_help="Run a development server.")
+@click.option("--host", "-h", default="127.0.0.1", help="The interface to bind to.")
+@click.option("--port", "-p", default=5000, help="The port to bind to.")
+@click.option(
+    "--cert", type=CertParamType(), help="Specify a certificate file to use HTTPS."
+)
+@click.option(
+    "--key",
+    type=click.Path(exists=True, dir_okay=False, resolve_path=True),
+    callback=_validate_key,
+    expose_value=False,
+    help="The key file to use when specifying a certificate.",
+)
+@click.option(
+    "--reload/--no-reload",
+    default=None,
+    help="Enable or disable the reloader. By default the reloader "
+    "is active if debug is enabled.",
+)
+@click.option(
+    "--debugger/--no-debugger",
+    default=None,
+    help="Enable or disable the debugger. By default the debugger "
+    "is active if debug is enabled.",
+)
+@click.option(
+    "--eager-loading/--lazy-loader",
+    default=None,
+    help="Enable or disable eager loading. By default eager "
+    "loading is enabled if the reloader is disabled.",
+)
+@click.option(
+    "--with-threads/--without-threads",
+    default=True,
+    help="Enable or disable multithreading.",
+)
+@click.option(
+    "--extra-files",
+    default=None,
+    type=SeparatedPathType(),
+    help=(
+        "Extra files that trigger a reload on change. Multiple paths"
+        " are separated by '{}'.".format(os.path.pathsep)
+    ),
+)
+@pass_script_info
+def run_command(
+    info, host, port, reload, debugger, eager_loading, with_threads, cert, extra_files
+):
+    """Run a local development server.
+
+    This server is for development purposes only. It does not provide
+    the stability, security, or performance of production WSGI servers.
+
+    The reloader and debugger are enabled by default if
+    FLASK_ENV=development or FLASK_DEBUG=1.
+    """
+    debug = get_debug_flag()
+
+    if reload is None:
+        reload = debug
+
+    if debugger is None:
+        debugger = debug
+
+    if eager_loading is None:
+        eager_loading = not reload
+
+    show_server_banner(get_env(), debug, info.app_import_path, eager_loading)
+    app = DispatchingApp(info.load_app, use_eager_loading=eager_loading)
+
+    from werkzeug.serving import run_simple
+
+    run_simple(
+        host,
+        port,
+        app,
+        use_reloader=reload,
+        use_debugger=debugger,
+        threaded=with_threads,
+        ssl_context=cert,
+        extra_files=extra_files,
+    )
+
+
+@click.command("shell", short_help="Run a shell in the app context.")
+@with_appcontext
+def shell_command():
+    """Run an interactive Python shell in the context of a given
+    Flask application.  The application will populate the default
+    namespace of this shell according to it's configuration.
+
+    This is useful for executing small snippets of management code
+    without having to manually configure the application.
+    """
+    import code
+    from .globals import _app_ctx_stack
+
+    app = _app_ctx_stack.top.app
+    banner = "Python %s on %s\nApp: %s [%s]\nInstance: %s" % (
+        sys.version,
+        sys.platform,
+        app.import_name,
+        app.env,
+        app.instance_path,
+    )
+    ctx = {}
+
+    # Support the regular Python interpreter startup script if someone
+    # is using it.
+    startup = os.environ.get("PYTHONSTARTUP")
+    if startup and os.path.isfile(startup):
+        with open(startup, "r") as f:
+            eval(compile(f.read(), startup, "exec"), ctx)
+
+    ctx.update(app.make_shell_context())
+
+    code.interact(banner=banner, local=ctx)
+
+
+@click.command("routes", short_help="Show the routes for the app.")
+@click.option(
+    "--sort",
+    "-s",
+    type=click.Choice(("endpoint", "methods", "rule", "match")),
+    default="endpoint",
+    help=(
+        'Method to sort routes by. "match" is the order that Flask will match '
+        "routes when dispatching a request."
+    ),
+)
+@click.option("--all-methods", is_flag=True, help="Show HEAD and OPTIONS methods.")
+@with_appcontext
+def routes_command(sort, all_methods):
+    """Show all registered routes with endpoints and methods."""
+
+    rules = list(current_app.url_map.iter_rules())
+    if not rules:
+        click.echo("No routes were registered.")
+        return
+
+    ignored_methods = set(() if all_methods else ("HEAD", "OPTIONS"))
+
+    if sort in ("endpoint", "rule"):
+        rules = sorted(rules, key=attrgetter(sort))
+    elif sort == "methods":
+        rules = sorted(rules, key=lambda rule: sorted(rule.methods))
+
+    rule_methods = [", ".join(sorted(rule.methods - ignored_methods)) for rule in rules]
+
+    headers = ("Endpoint", "Methods", "Rule")
+    widths = (
+        max(len(rule.endpoint) for rule in rules),
+        max(len(methods) for methods in rule_methods),
+        max(len(rule.rule) for rule in rules),
+    )
+    widths = [max(len(h), w) for h, w in zip(headers, widths)]
+    row = "{{0:<{0}}}  {{1:<{1}}}  {{2:<{2}}}".format(*widths)
+
+    click.echo(row.format(*headers).strip())
+    click.echo(row.format(*("-" * width for width in widths)))
+
+    for rule, methods in zip(rules, rule_methods):
+        click.echo(row.format(rule.endpoint, methods, rule.rule).rstrip())
+
+
+cli = FlaskGroup(
+    help="""\
+A general utility script for Flask applications.
+
+Provides commands from Flask, extensions, and the application. Loads the
+application defined in the FLASK_APP environment variable, or from a wsgi.py
+file. Setting the FLASK_ENV environment variable to 'development' will enable
+debug mode.
+
+\b
+  {prefix}{cmd} FLASK_APP=hello.py
+  {prefix}{cmd} FLASK_ENV=development
+  {prefix}flask run
+""".format(
+        cmd="export" if os.name == "posix" else "set",
+        prefix="$ " if os.name == "posix" else "> ",
+    )
+)
+
+
+def main(as_module=False):
+    # TODO omit sys.argv once https://github.com/pallets/click/issues/536 is fixed
+    cli.main(args=sys.argv[1:], prog_name="python -m flask" if as_module else None)
+
+
+if __name__ == "__main__":
+    main(as_module=True)
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/config.py b/python3-vckonline/lib/python3.8/site-packages/flask/config.py
new file mode 100644
index 0000000..809de33
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/config.py
@@ -0,0 +1,269 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.config
+    ~~~~~~~~~~~~
+
+    Implements the configuration related objects.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+import errno
+import os
+import types
+
+from werkzeug.utils import import_string
+
+from . import json
+from ._compat import iteritems
+from ._compat import string_types
+
+
+class ConfigAttribute(object):
+    """Makes an attribute forward to the config"""
+
+    def __init__(self, name, get_converter=None):
+        self.__name__ = name
+        self.get_converter = get_converter
+
+    def __get__(self, obj, type=None):
+        if obj is None:
+            return self
+        rv = obj.config[self.__name__]
+        if self.get_converter is not None:
+            rv = self.get_converter(rv)
+        return rv
+
+    def __set__(self, obj, value):
+        obj.config[self.__name__] = value
+
+
+class Config(dict):
+    """Works exactly like a dict but provides ways to fill it from files
+    or special dictionaries.  There are two common patterns to populate the
+    config.
+
+    Either you can fill the config from a config file::
+
+        app.config.from_pyfile('yourconfig.cfg')
+
+    Or alternatively you can define the configuration options in the
+    module that calls :meth:`from_object` or provide an import path to
+    a module that should be loaded.  It is also possible to tell it to
+    use the same module and with that provide the configuration values
+    just before the call::
+
+        DEBUG = True
+        SECRET_KEY = 'development key'
+        app.config.from_object(__name__)
+
+    In both cases (loading from any Python file or loading from modules),
+    only uppercase keys are added to the config.  This makes it possible to use
+    lowercase values in the config file for temporary values that are not added
+    to the config or to define the config keys in the same file that implements
+    the application.
+
+    Probably the most interesting way to load configurations is from an
+    environment variable pointing to a file::
+
+        app.config.from_envvar('YOURAPPLICATION_SETTINGS')
+
+    In this case before launching the application you have to set this
+    environment variable to the file you want to use.  On Linux and OS X
+    use the export statement::
+
+        export YOURAPPLICATION_SETTINGS='/path/to/config/file'
+
+    On windows use `set` instead.
+
+    :param root_path: path to which files are read relative from.  When the
+                      config object is created by the application, this is
+                      the application's :attr:`~flask.Flask.root_path`.
+    :param defaults: an optional dictionary of default values
+    """
+
+    def __init__(self, root_path, defaults=None):
+        dict.__init__(self, defaults or {})
+        self.root_path = root_path
+
+    def from_envvar(self, variable_name, silent=False):
+        """Loads a configuration from an environment variable pointing to
+        a configuration file.  This is basically just a shortcut with nicer
+        error messages for this line of code::
+
+            app.config.from_pyfile(os.environ['YOURAPPLICATION_SETTINGS'])
+
+        :param variable_name: name of the environment variable
+        :param silent: set to ``True`` if you want silent failure for missing
+                       files.
+        :return: bool. ``True`` if able to load config, ``False`` otherwise.
+        """
+        rv = os.environ.get(variable_name)
+        if not rv:
+            if silent:
+                return False
+            raise RuntimeError(
+                "The environment variable %r is not set "
+                "and as such configuration could not be "
+                "loaded.  Set this variable and make it "
+                "point to a configuration file" % variable_name
+            )
+        return self.from_pyfile(rv, silent=silent)
+
+    def from_pyfile(self, filename, silent=False):
+        """Updates the values in the config from a Python file.  This function
+        behaves as if the file was imported as module with the
+        :meth:`from_object` function.
+
+        :param filename: the filename of the config.  This can either be an
+                         absolute filename or a filename relative to the
+                         root path.
+        :param silent: set to ``True`` if you want silent failure for missing
+                       files.
+
+        .. versionadded:: 0.7
+           `silent` parameter.
+        """
+        filename = os.path.join(self.root_path, filename)
+        d = types.ModuleType("config")
+        d.__file__ = filename
+        try:
+            with open(filename, mode="rb") as config_file:
+                exec(compile(config_file.read(), filename, "exec"), d.__dict__)
+        except IOError as e:
+            if silent and e.errno in (errno.ENOENT, errno.EISDIR, errno.ENOTDIR):
+                return False
+            e.strerror = "Unable to load configuration file (%s)" % e.strerror
+            raise
+        self.from_object(d)
+        return True
+
+    def from_object(self, obj):
+        """Updates the values from the given object.  An object can be of one
+        of the following two types:
+
+        -   a string: in this case the object with that name will be imported
+        -   an actual object reference: that object is used directly
+
+        Objects are usually either modules or classes. :meth:`from_object`
+        loads only the uppercase attributes of the module/class. A ``dict``
+        object will not work with :meth:`from_object` because the keys of a
+        ``dict`` are not attributes of the ``dict`` class.
+
+        Example of module-based configuration::
+
+            app.config.from_object('yourapplication.default_config')
+            from yourapplication import default_config
+            app.config.from_object(default_config)
+
+        Nothing is done to the object before loading. If the object is a
+        class and has ``@property`` attributes, it needs to be
+        instantiated before being passed to this method.
+
+        You should not use this function to load the actual configuration but
+        rather configuration defaults.  The actual config should be loaded
+        with :meth:`from_pyfile` and ideally from a location not within the
+        package because the package might be installed system wide.
+
+        See :ref:`config-dev-prod` for an example of class-based configuration
+        using :meth:`from_object`.
+
+        :param obj: an import name or object
+        """
+        if isinstance(obj, string_types):
+            obj = import_string(obj)
+        for key in dir(obj):
+            if key.isupper():
+                self[key] = getattr(obj, key)
+
+    def from_json(self, filename, silent=False):
+        """Updates the values in the config from a JSON file. This function
+        behaves as if the JSON object was a dictionary and passed to the
+        :meth:`from_mapping` function.
+
+        :param filename: the filename of the JSON file.  This can either be an
+                         absolute filename or a filename relative to the
+                         root path.
+        :param silent: set to ``True`` if you want silent failure for missing
+                       files.
+
+        .. versionadded:: 0.11
+        """
+        filename = os.path.join(self.root_path, filename)
+
+        try:
+            with open(filename) as json_file:
+                obj = json.loads(json_file.read())
+        except IOError as e:
+            if silent and e.errno in (errno.ENOENT, errno.EISDIR):
+                return False
+            e.strerror = "Unable to load configuration file (%s)" % e.strerror
+            raise
+        return self.from_mapping(obj)
+
+    def from_mapping(self, *mapping, **kwargs):
+        """Updates the config like :meth:`update` ignoring items with non-upper
+        keys.
+
+        .. versionadded:: 0.11
+        """
+        mappings = []
+        if len(mapping) == 1:
+            if hasattr(mapping[0], "items"):
+                mappings.append(mapping[0].items())
+            else:
+                mappings.append(mapping[0])
+        elif len(mapping) > 1:
+            raise TypeError(
+                "expected at most 1 positional argument, got %d" % len(mapping)
+            )
+        mappings.append(kwargs.items())
+        for mapping in mappings:
+            for (key, value) in mapping:
+                if key.isupper():
+                    self[key] = value
+        return True
+
+    def get_namespace(self, namespace, lowercase=True, trim_namespace=True):
+        """Returns a dictionary containing a subset of configuration options
+        that match the specified namespace/prefix. Example usage::
+
+            app.config['IMAGE_STORE_TYPE'] = 'fs'
+            app.config['IMAGE_STORE_PATH'] = '/var/app/images'
+            app.config['IMAGE_STORE_BASE_URL'] = 'http://img.website.com'
+            image_store_config = app.config.get_namespace('IMAGE_STORE_')
+
+        The resulting dictionary `image_store_config` would look like::
+
+            {
+                'type': 'fs',
+                'path': '/var/app/images',
+                'base_url': 'http://img.website.com'
+            }
+
+        This is often useful when configuration options map directly to
+        keyword arguments in functions or class constructors.
+
+        :param namespace: a configuration namespace
+        :param lowercase: a flag indicating if the keys of the resulting
+                          dictionary should be lowercase
+        :param trim_namespace: a flag indicating if the keys of the resulting
+                          dictionary should not include the namespace
+
+        .. versionadded:: 0.11
+        """
+        rv = {}
+        for k, v in iteritems(self):
+            if not k.startswith(namespace):
+                continue
+            if trim_namespace:
+                key = k[len(namespace) :]
+            else:
+                key = k
+            if lowercase:
+                key = key.lower()
+            rv[key] = v
+        return rv
+
+    def __repr__(self):
+        return "<%s %s>" % (self.__class__.__name__, dict.__repr__(self))
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/ctx.py b/python3-vckonline/lib/python3.8/site-packages/flask/ctx.py
new file mode 100644
index 0000000..172f6a0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/ctx.py
@@ -0,0 +1,475 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.ctx
+    ~~~~~~~~~
+
+    Implements the objects required to keep the context.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+import sys
+from functools import update_wrapper
+
+from werkzeug.exceptions import HTTPException
+
+from ._compat import BROKEN_PYPY_CTXMGR_EXIT
+from ._compat import reraise
+from .globals import _app_ctx_stack
+from .globals import _request_ctx_stack
+from .signals import appcontext_popped
+from .signals import appcontext_pushed
+
+
+# a singleton sentinel value for parameter defaults
+_sentinel = object()
+
+
+class _AppCtxGlobals(object):
+    """A plain object. Used as a namespace for storing data during an
+    application context.
+
+    Creating an app context automatically creates this object, which is
+    made available as the :data:`g` proxy.
+
+    .. describe:: 'key' in g
+
+        Check whether an attribute is present.
+
+        .. versionadded:: 0.10
+
+    .. describe:: iter(g)
+
+        Return an iterator over the attribute names.
+
+        .. versionadded:: 0.10
+    """
+
+    def get(self, name, default=None):
+        """Get an attribute by name, or a default value. Like
+        :meth:`dict.get`.
+
+        :param name: Name of attribute to get.
+        :param default: Value to return if the attribute is not present.
+
+        .. versionadded:: 0.10
+        """
+        return self.__dict__.get(name, default)
+
+    def pop(self, name, default=_sentinel):
+        """Get and remove an attribute by name. Like :meth:`dict.pop`.
+
+        :param name: Name of attribute to pop.
+        :param default: Value to return if the attribute is not present,
+            instead of raise a ``KeyError``.
+
+        .. versionadded:: 0.11
+        """
+        if default is _sentinel:
+            return self.__dict__.pop(name)
+        else:
+            return self.__dict__.pop(name, default)
+
+    def setdefault(self, name, default=None):
+        """Get the value of an attribute if it is present, otherwise
+        set and return a default value. Like :meth:`dict.setdefault`.
+
+        :param name: Name of attribute to get.
+        :param: default: Value to set and return if the attribute is not
+            present.
+
+        .. versionadded:: 0.11
+        """
+        return self.__dict__.setdefault(name, default)
+
+    def __contains__(self, item):
+        return item in self.__dict__
+
+    def __iter__(self):
+        return iter(self.__dict__)
+
+    def __repr__(self):
+        top = _app_ctx_stack.top
+        if top is not None:
+            return "<flask.g of %r>" % top.app.name
+        return object.__repr__(self)
+
+
+def after_this_request(f):
+    """Executes a function after this request.  This is useful to modify
+    response objects.  The function is passed the response object and has
+    to return the same or a new one.
+
+    Example::
+
+        @app.route('/')
+        def index():
+            @after_this_request
+            def add_header(response):
+                response.headers['X-Foo'] = 'Parachute'
+                return response
+            return 'Hello World!'
+
+    This is more useful if a function other than the view function wants to
+    modify a response.  For instance think of a decorator that wants to add
+    some headers without converting the return value into a response object.
+
+    .. versionadded:: 0.9
+    """
+    _request_ctx_stack.top._after_request_functions.append(f)
+    return f
+
+
+def copy_current_request_context(f):
+    """A helper function that decorates a function to retain the current
+    request context.  This is useful when working with greenlets.  The moment
+    the function is decorated a copy of the request context is created and
+    then pushed when the function is called.  The current session is also
+    included in the copied request context.
+
+    Example::
+
+        import gevent
+        from flask import copy_current_request_context
+
+        @app.route('/')
+        def index():
+            @copy_current_request_context
+            def do_some_work():
+                # do some work here, it can access flask.request or
+                # flask.session like you would otherwise in the view function.
+                ...
+            gevent.spawn(do_some_work)
+            return 'Regular response'
+
+    .. versionadded:: 0.10
+    """
+    top = _request_ctx_stack.top
+    if top is None:
+        raise RuntimeError(
+            "This decorator can only be used at local scopes "
+            "when a request context is on the stack.  For instance within "
+            "view functions."
+        )
+    reqctx = top.copy()
+
+    def wrapper(*args, **kwargs):
+        with reqctx:
+            return f(*args, **kwargs)
+
+    return update_wrapper(wrapper, f)
+
+
+def has_request_context():
+    """If you have code that wants to test if a request context is there or
+    not this function can be used.  For instance, you may want to take advantage
+    of request information if the request object is available, but fail
+    silently if it is unavailable.
+
+    ::
+
+        class User(db.Model):
+
+            def __init__(self, username, remote_addr=None):
+                self.username = username
+                if remote_addr is None and has_request_context():
+                    remote_addr = request.remote_addr
+                self.remote_addr = remote_addr
+
+    Alternatively you can also just test any of the context bound objects
+    (such as :class:`request` or :class:`g`) for truthness::
+
+        class User(db.Model):
+
+            def __init__(self, username, remote_addr=None):
+                self.username = username
+                if remote_addr is None and request:
+                    remote_addr = request.remote_addr
+                self.remote_addr = remote_addr
+
+    .. versionadded:: 0.7
+    """
+    return _request_ctx_stack.top is not None
+
+
+def has_app_context():
+    """Works like :func:`has_request_context` but for the application
+    context.  You can also just do a boolean check on the
+    :data:`current_app` object instead.
+
+    .. versionadded:: 0.9
+    """
+    return _app_ctx_stack.top is not None
+
+
+class AppContext(object):
+    """The application context binds an application object implicitly
+    to the current thread or greenlet, similar to how the
+    :class:`RequestContext` binds request information.  The application
+    context is also implicitly created if a request context is created
+    but the application is not on top of the individual application
+    context.
+    """
+
+    def __init__(self, app):
+        self.app = app
+        self.url_adapter = app.create_url_adapter(None)
+        self.g = app.app_ctx_globals_class()
+
+        # Like request context, app contexts can be pushed multiple times
+        # but there a basic "refcount" is enough to track them.
+        self._refcnt = 0
+
+    def push(self):
+        """Binds the app context to the current context."""
+        self._refcnt += 1
+        if hasattr(sys, "exc_clear"):
+            sys.exc_clear()
+        _app_ctx_stack.push(self)
+        appcontext_pushed.send(self.app)
+
+    def pop(self, exc=_sentinel):
+        """Pops the app context."""
+        try:
+            self._refcnt -= 1
+            if self._refcnt <= 0:
+                if exc is _sentinel:
+                    exc = sys.exc_info()[1]
+                self.app.do_teardown_appcontext(exc)
+        finally:
+            rv = _app_ctx_stack.pop()
+        assert rv is self, "Popped wrong app context.  (%r instead of %r)" % (rv, self)
+        appcontext_popped.send(self.app)
+
+    def __enter__(self):
+        self.push()
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.pop(exc_value)
+
+        if BROKEN_PYPY_CTXMGR_EXIT and exc_type is not None:
+            reraise(exc_type, exc_value, tb)
+
+
+class RequestContext(object):
+    """The request context contains all request relevant information.  It is
+    created at the beginning of the request and pushed to the
+    `_request_ctx_stack` and removed at the end of it.  It will create the
+    URL adapter and request object for the WSGI environment provided.
+
+    Do not attempt to use this class directly, instead use
+    :meth:`~flask.Flask.test_request_context` and
+    :meth:`~flask.Flask.request_context` to create this object.
+
+    When the request context is popped, it will evaluate all the
+    functions registered on the application for teardown execution
+    (:meth:`~flask.Flask.teardown_request`).
+
+    The request context is automatically popped at the end of the request
+    for you.  In debug mode the request context is kept around if
+    exceptions happen so that interactive debuggers have a chance to
+    introspect the data.  With 0.4 this can also be forced for requests
+    that did not fail and outside of ``DEBUG`` mode.  By setting
+    ``'flask._preserve_context'`` to ``True`` on the WSGI environment the
+    context will not pop itself at the end of the request.  This is used by
+    the :meth:`~flask.Flask.test_client` for example to implement the
+    deferred cleanup functionality.
+
+    You might find this helpful for unittests where you need the
+    information from the context local around for a little longer.  Make
+    sure to properly :meth:`~werkzeug.LocalStack.pop` the stack yourself in
+    that situation, otherwise your unittests will leak memory.
+    """
+
+    def __init__(self, app, environ, request=None, session=None):
+        self.app = app
+        if request is None:
+            request = app.request_class(environ)
+        self.request = request
+        self.url_adapter = None
+        try:
+            self.url_adapter = app.create_url_adapter(self.request)
+        except HTTPException as e:
+            self.request.routing_exception = e
+        self.flashes = None
+        self.session = session
+
+        # Request contexts can be pushed multiple times and interleaved with
+        # other request contexts.  Now only if the last level is popped we
+        # get rid of them.  Additionally if an application context is missing
+        # one is created implicitly so for each level we add this information
+        self._implicit_app_ctx_stack = []
+
+        # indicator if the context was preserved.  Next time another context
+        # is pushed the preserved context is popped.
+        self.preserved = False
+
+        # remembers the exception for pop if there is one in case the context
+        # preservation kicks in.
+        self._preserved_exc = None
+
+        # Functions that should be executed after the request on the response
+        # object.  These will be called before the regular "after_request"
+        # functions.
+        self._after_request_functions = []
+
+    @property
+    def g(self):
+        return _app_ctx_stack.top.g
+
+    @g.setter
+    def g(self, value):
+        _app_ctx_stack.top.g = value
+
+    def copy(self):
+        """Creates a copy of this request context with the same request object.
+        This can be used to move a request context to a different greenlet.
+        Because the actual request object is the same this cannot be used to
+        move a request context to a different thread unless access to the
+        request object is locked.
+
+        .. versionadded:: 0.10
+
+        .. versionchanged:: 1.1
+           The current session object is used instead of reloading the original
+           data. This prevents `flask.session` pointing to an out-of-date object.
+        """
+        return self.__class__(
+            self.app,
+            environ=self.request.environ,
+            request=self.request,
+            session=self.session,
+        )
+
+    def match_request(self):
+        """Can be overridden by a subclass to hook into the matching
+        of the request.
+        """
+        try:
+            result = self.url_adapter.match(return_rule=True)
+            self.request.url_rule, self.request.view_args = result
+        except HTTPException as e:
+            self.request.routing_exception = e
+
+    def push(self):
+        """Binds the request context to the current context."""
+        # If an exception occurs in debug mode or if context preservation is
+        # activated under exception situations exactly one context stays
+        # on the stack.  The rationale is that you want to access that
+        # information under debug situations.  However if someone forgets to
+        # pop that context again we want to make sure that on the next push
+        # it's invalidated, otherwise we run at risk that something leaks
+        # memory.  This is usually only a problem in test suite since this
+        # functionality is not active in production environments.
+        top = _request_ctx_stack.top
+        if top is not None and top.preserved:
+            top.pop(top._preserved_exc)
+
+        # Before we push the request context we have to ensure that there
+        # is an application context.
+        app_ctx = _app_ctx_stack.top
+        if app_ctx is None or app_ctx.app != self.app:
+            app_ctx = self.app.app_context()
+            app_ctx.push()
+            self._implicit_app_ctx_stack.append(app_ctx)
+        else:
+            self._implicit_app_ctx_stack.append(None)
+
+        if hasattr(sys, "exc_clear"):
+            sys.exc_clear()
+
+        _request_ctx_stack.push(self)
+
+        # Open the session at the moment that the request context is available.
+        # This allows a custom open_session method to use the request context.
+        # Only open a new session if this is the first time the request was
+        # pushed, otherwise stream_with_context loses the session.
+        if self.session is None:
+            session_interface = self.app.session_interface
+            self.session = session_interface.open_session(self.app, self.request)
+
+            if self.session is None:
+                self.session = session_interface.make_null_session(self.app)
+
+        if self.url_adapter is not None:
+            self.match_request()
+
+    def pop(self, exc=_sentinel):
+        """Pops the request context and unbinds it by doing that.  This will
+        also trigger the execution of functions registered by the
+        :meth:`~flask.Flask.teardown_request` decorator.
+
+        .. versionchanged:: 0.9
+           Added the `exc` argument.
+        """
+        app_ctx = self._implicit_app_ctx_stack.pop()
+
+        try:
+            clear_request = False
+            if not self._implicit_app_ctx_stack:
+                self.preserved = False
+                self._preserved_exc = None
+                if exc is _sentinel:
+                    exc = sys.exc_info()[1]
+                self.app.do_teardown_request(exc)
+
+                # If this interpreter supports clearing the exception information
+                # we do that now.  This will only go into effect on Python 2.x,
+                # on 3.x it disappears automatically at the end of the exception
+                # stack.
+                if hasattr(sys, "exc_clear"):
+                    sys.exc_clear()
+
+                request_close = getattr(self.request, "close", None)
+                if request_close is not None:
+                    request_close()
+                clear_request = True
+        finally:
+            rv = _request_ctx_stack.pop()
+
+            # get rid of circular dependencies at the end of the request
+            # so that we don't require the GC to be active.
+            if clear_request:
+                rv.request.environ["werkzeug.request"] = None
+
+            # Get rid of the app as well if necessary.
+            if app_ctx is not None:
+                app_ctx.pop(exc)
+
+            assert rv is self, "Popped wrong request context. (%r instead of %r)" % (
+                rv,
+                self,
+            )
+
+    def auto_pop(self, exc):
+        if self.request.environ.get("flask._preserve_context") or (
+            exc is not None and self.app.preserve_context_on_exception
+        ):
+            self.preserved = True
+            self._preserved_exc = exc
+        else:
+            self.pop(exc)
+
+    def __enter__(self):
+        self.push()
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        # do not pop the request stack if we are in debug mode and an
+        # exception happened.  This will allow the debugger to still
+        # access the request object in the interactive shell.  Furthermore
+        # the context can be force kept alive for the test client.
+        # See flask.testing for how this works.
+        self.auto_pop(exc_value)
+
+        if BROKEN_PYPY_CTXMGR_EXIT and exc_type is not None:
+            reraise(exc_type, exc_value, tb)
+
+    def __repr__(self):
+        return "<%s '%s' [%s] of %s>" % (
+            self.__class__.__name__,
+            self.request.url,
+            self.request.method,
+            self.app.name,
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/debughelpers.py b/python3-vckonline/lib/python3.8/site-packages/flask/debughelpers.py
new file mode 100644
index 0000000..e475bd1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/debughelpers.py
@@ -0,0 +1,183 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.debughelpers
+    ~~~~~~~~~~~~~~~~~~
+
+    Various helpers to make the development experience better.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+import os
+from warnings import warn
+
+from ._compat import implements_to_string
+from ._compat import text_type
+from .app import Flask
+from .blueprints import Blueprint
+from .globals import _request_ctx_stack
+
+
+class UnexpectedUnicodeError(AssertionError, UnicodeError):
+    """Raised in places where we want some better error reporting for
+    unexpected unicode or binary data.
+    """
+
+
+@implements_to_string
+class DebugFilesKeyError(KeyError, AssertionError):
+    """Raised from request.files during debugging.  The idea is that it can
+    provide a better error message than just a generic KeyError/BadRequest.
+    """
+
+    def __init__(self, request, key):
+        form_matches = request.form.getlist(key)
+        buf = [
+            'You tried to access the file "%s" in the request.files '
+            "dictionary but it does not exist.  The mimetype for the request "
+            'is "%s" instead of "multipart/form-data" which means that no '
+            "file contents were transmitted.  To fix this error you should "
+            'provide enctype="multipart/form-data" in your form.'
+            % (key, request.mimetype)
+        ]
+        if form_matches:
+            buf.append(
+                "\n\nThe browser instead transmitted some file names. "
+                "This was submitted: %s" % ", ".join('"%s"' % x for x in form_matches)
+            )
+        self.msg = "".join(buf)
+
+    def __str__(self):
+        return self.msg
+
+
+class FormDataRoutingRedirect(AssertionError):
+    """This exception is raised by Flask in debug mode if it detects a
+    redirect caused by the routing system when the request method is not
+    GET, HEAD or OPTIONS.  Reasoning: form data will be dropped.
+    """
+
+    def __init__(self, request):
+        exc = request.routing_exception
+        buf = [
+            "A request was sent to this URL (%s) but a redirect was "
+            'issued automatically by the routing system to "%s".'
+            % (request.url, exc.new_url)
+        ]
+
+        # In case just a slash was appended we can be extra helpful
+        if request.base_url + "/" == exc.new_url.split("?")[0]:
+            buf.append(
+                "  The URL was defined with a trailing slash so "
+                "Flask will automatically redirect to the URL "
+                "with the trailing slash if it was accessed "
+                "without one."
+            )
+
+        buf.append(
+            "  Make sure to directly send your %s-request to this URL "
+            "since we can't make browsers or HTTP clients redirect "
+            "with form data reliably or without user interaction." % request.method
+        )
+        buf.append("\n\nNote: this exception is only raised in debug mode")
+        AssertionError.__init__(self, "".join(buf).encode("utf-8"))
+
+
+def attach_enctype_error_multidict(request):
+    """Since Flask 0.8 we're monkeypatching the files object in case a
+    request is detected that does not use multipart form data but the files
+    object is accessed.
+    """
+    oldcls = request.files.__class__
+
+    class newcls(oldcls):
+        def __getitem__(self, key):
+            try:
+                return oldcls.__getitem__(self, key)
+            except KeyError:
+                if key not in request.form:
+                    raise
+                raise DebugFilesKeyError(request, key)
+
+    newcls.__name__ = oldcls.__name__
+    newcls.__module__ = oldcls.__module__
+    request.files.__class__ = newcls
+
+
+def _dump_loader_info(loader):
+    yield "class: %s.%s" % (type(loader).__module__, type(loader).__name__)
+    for key, value in sorted(loader.__dict__.items()):
+        if key.startswith("_"):
+            continue
+        if isinstance(value, (tuple, list)):
+            if not all(isinstance(x, (str, text_type)) for x in value):
+                continue
+            yield "%s:" % key
+            for item in value:
+                yield "  - %s" % item
+            continue
+        elif not isinstance(value, (str, text_type, int, float, bool)):
+            continue
+        yield "%s: %r" % (key, value)
+
+
+def explain_template_loading_attempts(app, template, attempts):
+    """This should help developers understand what failed"""
+    info = ['Locating template "%s":' % template]
+    total_found = 0
+    blueprint = None
+    reqctx = _request_ctx_stack.top
+    if reqctx is not None and reqctx.request.blueprint is not None:
+        blueprint = reqctx.request.blueprint
+
+    for idx, (loader, srcobj, triple) in enumerate(attempts):
+        if isinstance(srcobj, Flask):
+            src_info = 'application "%s"' % srcobj.import_name
+        elif isinstance(srcobj, Blueprint):
+            src_info = 'blueprint "%s" (%s)' % (srcobj.name, srcobj.import_name)
+        else:
+            src_info = repr(srcobj)
+
+        info.append("% 5d: trying loader of %s" % (idx + 1, src_info))
+
+        for line in _dump_loader_info(loader):
+            info.append("       %s" % line)
+
+        if triple is None:
+            detail = "no match"
+        else:
+            detail = "found (%r)" % (triple[1] or "<string>")
+            total_found += 1
+        info.append("       -> %s" % detail)
+
+    seems_fishy = False
+    if total_found == 0:
+        info.append("Error: the template could not be found.")
+        seems_fishy = True
+    elif total_found > 1:
+        info.append("Warning: multiple loaders returned a match for the template.")
+        seems_fishy = True
+
+    if blueprint is not None and seems_fishy:
+        info.append(
+            "  The template was looked up from an endpoint that "
+            'belongs to the blueprint "%s".' % blueprint
+        )
+        info.append("  Maybe you did not place a template in the right folder?")
+        info.append("  See http://flask.pocoo.org/docs/blueprints/#templates")
+
+    app.logger.info("\n".join(info))
+
+
+def explain_ignored_app_run():
+    if os.environ.get("WERKZEUG_RUN_MAIN") != "true":
+        warn(
+            Warning(
+                "Silently ignoring app.run() because the "
+                "application is run from the flask command line "
+                "executable.  Consider putting app.run() behind an "
+                'if __name__ == "__main__" guard to silence this '
+                "warning."
+            ),
+            stacklevel=3,
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/globals.py b/python3-vckonline/lib/python3.8/site-packages/flask/globals.py
new file mode 100644
index 0000000..6d32dcf
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/globals.py
@@ -0,0 +1,62 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.globals
+    ~~~~~~~~~~~~~
+
+    Defines all the global objects that are proxies to the current
+    active context.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+from functools import partial
+
+from werkzeug.local import LocalProxy
+from werkzeug.local import LocalStack
+
+
+_request_ctx_err_msg = """\
+Working outside of request context.
+
+This typically means that you attempted to use functionality that needed
+an active HTTP request.  Consult the documentation on testing for
+information about how to avoid this problem.\
+"""
+_app_ctx_err_msg = """\
+Working outside of application context.
+
+This typically means that you attempted to use functionality that needed
+to interface with the current application object in some way. To solve
+this, set up an application context with app.app_context().  See the
+documentation for more information.\
+"""
+
+
+def _lookup_req_object(name):
+    top = _request_ctx_stack.top
+    if top is None:
+        raise RuntimeError(_request_ctx_err_msg)
+    return getattr(top, name)
+
+
+def _lookup_app_object(name):
+    top = _app_ctx_stack.top
+    if top is None:
+        raise RuntimeError(_app_ctx_err_msg)
+    return getattr(top, name)
+
+
+def _find_app():
+    top = _app_ctx_stack.top
+    if top is None:
+        raise RuntimeError(_app_ctx_err_msg)
+    return top.app
+
+
+# context locals
+_request_ctx_stack = LocalStack()
+_app_ctx_stack = LocalStack()
+current_app = LocalProxy(_find_app)
+request = LocalProxy(partial(_lookup_req_object, "request"))
+session = LocalProxy(partial(_lookup_req_object, "session"))
+g = LocalProxy(partial(_lookup_app_object, "g"))
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/helpers.py b/python3-vckonline/lib/python3.8/site-packages/flask/helpers.py
new file mode 100644
index 0000000..df06db8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/helpers.py
@@ -0,0 +1,1155 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.helpers
+    ~~~~~~~~~~~~~
+
+    Implements various helpers.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+import io
+import mimetypes
+import os
+import pkgutil
+import posixpath
+import socket
+import sys
+import unicodedata
+from functools import update_wrapper
+from threading import RLock
+from time import time
+from zlib import adler32
+
+from jinja2 import FileSystemLoader
+from werkzeug.datastructures import Headers
+from werkzeug.exceptions import BadRequest
+from werkzeug.exceptions import NotFound
+from werkzeug.exceptions import RequestedRangeNotSatisfiable
+from werkzeug.routing import BuildError
+from werkzeug.urls import url_quote
+from werkzeug.wsgi import wrap_file
+
+from ._compat import fspath
+from ._compat import PY2
+from ._compat import string_types
+from ._compat import text_type
+from .globals import _app_ctx_stack
+from .globals import _request_ctx_stack
+from .globals import current_app
+from .globals import request
+from .globals import session
+from .signals import message_flashed
+
+# sentinel
+_missing = object()
+
+
+# what separators does this operating system provide that are not a slash?
+# this is used by the send_from_directory function to ensure that nobody is
+# able to access files from outside the filesystem.
+_os_alt_seps = list(
+    sep for sep in [os.path.sep, os.path.altsep] if sep not in (None, "/")
+)
+
+
+def get_env():
+    """Get the environment the app is running in, indicated by the
+    :envvar:`FLASK_ENV` environment variable. The default is
+    ``'production'``.
+    """
+    return os.environ.get("FLASK_ENV") or "production"
+
+
+def get_debug_flag():
+    """Get whether debug mode should be enabled for the app, indicated
+    by the :envvar:`FLASK_DEBUG` environment variable. The default is
+    ``True`` if :func:`.get_env` returns ``'development'``, or ``False``
+    otherwise.
+    """
+    val = os.environ.get("FLASK_DEBUG")
+
+    if not val:
+        return get_env() == "development"
+
+    return val.lower() not in ("0", "false", "no")
+
+
+def get_load_dotenv(default=True):
+    """Get whether the user has disabled loading dotenv files by setting
+    :envvar:`FLASK_SKIP_DOTENV`. The default is ``True``, load the
+    files.
+
+    :param default: What to return if the env var isn't set.
+    """
+    val = os.environ.get("FLASK_SKIP_DOTENV")
+
+    if not val:
+        return default
+
+    return val.lower() in ("0", "false", "no")
+
+
+def _endpoint_from_view_func(view_func):
+    """Internal helper that returns the default endpoint for a given
+    function.  This always is the function name.
+    """
+    assert view_func is not None, "expected view func if endpoint is not provided."
+    return view_func.__name__
+
+
+def stream_with_context(generator_or_function):
+    """Request contexts disappear when the response is started on the server.
+    This is done for efficiency reasons and to make it less likely to encounter
+    memory leaks with badly written WSGI middlewares.  The downside is that if
+    you are using streamed responses, the generator cannot access request bound
+    information any more.
+
+    This function however can help you keep the context around for longer::
+
+        from flask import stream_with_context, request, Response
+
+        @app.route('/stream')
+        def streamed_response():
+            @stream_with_context
+            def generate():
+                yield 'Hello '
+                yield request.args['name']
+                yield '!'
+            return Response(generate())
+
+    Alternatively it can also be used around a specific generator::
+
+        from flask import stream_with_context, request, Response
+
+        @app.route('/stream')
+        def streamed_response():
+            def generate():
+                yield 'Hello '
+                yield request.args['name']
+                yield '!'
+            return Response(stream_with_context(generate()))
+
+    .. versionadded:: 0.9
+    """
+    try:
+        gen = iter(generator_or_function)
+    except TypeError:
+
+        def decorator(*args, **kwargs):
+            gen = generator_or_function(*args, **kwargs)
+            return stream_with_context(gen)
+
+        return update_wrapper(decorator, generator_or_function)
+
+    def generator():
+        ctx = _request_ctx_stack.top
+        if ctx is None:
+            raise RuntimeError(
+                "Attempted to stream with context but "
+                "there was no context in the first place to keep around."
+            )
+        with ctx:
+            # Dummy sentinel.  Has to be inside the context block or we're
+            # not actually keeping the context around.
+            yield None
+
+            # The try/finally is here so that if someone passes a WSGI level
+            # iterator in we're still running the cleanup logic.  Generators
+            # don't need that because they are closed on their destruction
+            # automatically.
+            try:
+                for item in gen:
+                    yield item
+            finally:
+                if hasattr(gen, "close"):
+                    gen.close()
+
+    # The trick is to start the generator.  Then the code execution runs until
+    # the first dummy None is yielded at which point the context was already
+    # pushed.  This item is discarded.  Then when the iteration continues the
+    # real generator is executed.
+    wrapped_g = generator()
+    next(wrapped_g)
+    return wrapped_g
+
+
+def make_response(*args):
+    """Sometimes it is necessary to set additional headers in a view.  Because
+    views do not have to return response objects but can return a value that
+    is converted into a response object by Flask itself, it becomes tricky to
+    add headers to it.  This function can be called instead of using a return
+    and you will get a response object which you can use to attach headers.
+
+    If view looked like this and you want to add a new header::
+
+        def index():
+            return render_template('index.html', foo=42)
+
+    You can now do something like this::
+
+        def index():
+            response = make_response(render_template('index.html', foo=42))
+            response.headers['X-Parachutes'] = 'parachutes are cool'
+            return response
+
+    This function accepts the very same arguments you can return from a
+    view function.  This for example creates a response with a 404 error
+    code::
+
+        response = make_response(render_template('not_found.html'), 404)
+
+    The other use case of this function is to force the return value of a
+    view function into a response which is helpful with view
+    decorators::
+
+        response = make_response(view_function())
+        response.headers['X-Parachutes'] = 'parachutes are cool'
+
+    Internally this function does the following things:
+
+    -   if no arguments are passed, it creates a new response argument
+    -   if one argument is passed, :meth:`flask.Flask.make_response`
+        is invoked with it.
+    -   if more than one argument is passed, the arguments are passed
+        to the :meth:`flask.Flask.make_response` function as tuple.
+
+    .. versionadded:: 0.6
+    """
+    if not args:
+        return current_app.response_class()
+    if len(args) == 1:
+        args = args[0]
+    return current_app.make_response(args)
+
+
+def url_for(endpoint, **values):
+    """Generates a URL to the given endpoint with the method provided.
+
+    Variable arguments that are unknown to the target endpoint are appended
+    to the generated URL as query arguments.  If the value of a query argument
+    is ``None``, the whole pair is skipped.  In case blueprints are active
+    you can shortcut references to the same blueprint by prefixing the
+    local endpoint with a dot (``.``).
+
+    This will reference the index function local to the current blueprint::
+
+        url_for('.index')
+
+    For more information, head over to the :ref:`Quickstart <url-building>`.
+
+    Configuration values ``APPLICATION_ROOT`` and ``SERVER_NAME`` are only used when
+    generating URLs outside of a request context.
+
+    To integrate applications, :class:`Flask` has a hook to intercept URL build
+    errors through :attr:`Flask.url_build_error_handlers`.  The `url_for`
+    function results in a :exc:`~werkzeug.routing.BuildError` when the current
+    app does not have a URL for the given endpoint and values.  When it does, the
+    :data:`~flask.current_app` calls its :attr:`~Flask.url_build_error_handlers` if
+    it is not ``None``, which can return a string to use as the result of
+    `url_for` (instead of `url_for`'s default to raise the
+    :exc:`~werkzeug.routing.BuildError` exception) or re-raise the exception.
+    An example::
+
+        def external_url_handler(error, endpoint, values):
+            "Looks up an external URL when `url_for` cannot build a URL."
+            # This is an example of hooking the build_error_handler.
+            # Here, lookup_url is some utility function you've built
+            # which looks up the endpoint in some external URL registry.
+            url = lookup_url(endpoint, **values)
+            if url is None:
+                # External lookup did not have a URL.
+                # Re-raise the BuildError, in context of original traceback.
+                exc_type, exc_value, tb = sys.exc_info()
+                if exc_value is error:
+                    raise exc_type, exc_value, tb
+                else:
+                    raise error
+            # url_for will use this result, instead of raising BuildError.
+            return url
+
+        app.url_build_error_handlers.append(external_url_handler)
+
+    Here, `error` is the instance of :exc:`~werkzeug.routing.BuildError`, and
+    `endpoint` and `values` are the arguments passed into `url_for`.  Note
+    that this is for building URLs outside the current application, and not for
+    handling 404 NotFound errors.
+
+    .. versionadded:: 0.10
+       The `_scheme` parameter was added.
+
+    .. versionadded:: 0.9
+       The `_anchor` and `_method` parameters were added.
+
+    .. versionadded:: 0.9
+       Calls :meth:`Flask.handle_build_error` on
+       :exc:`~werkzeug.routing.BuildError`.
+
+    :param endpoint: the endpoint of the URL (name of the function)
+    :param values: the variable arguments of the URL rule
+    :param _external: if set to ``True``, an absolute URL is generated. Server
+      address can be changed via ``SERVER_NAME`` configuration variable which
+      falls back to the `Host` header, then to the IP and port of the request.
+    :param _scheme: a string specifying the desired URL scheme. The `_external`
+      parameter must be set to ``True`` or a :exc:`ValueError` is raised. The default
+      behavior uses the same scheme as the current request, or
+      ``PREFERRED_URL_SCHEME`` from the :ref:`app configuration <config>` if no
+      request context is available. As of Werkzeug 0.10, this also can be set
+      to an empty string to build protocol-relative URLs.
+    :param _anchor: if provided this is added as anchor to the URL.
+    :param _method: if provided this explicitly specifies an HTTP method.
+    """
+    appctx = _app_ctx_stack.top
+    reqctx = _request_ctx_stack.top
+
+    if appctx is None:
+        raise RuntimeError(
+            "Attempted to generate a URL without the application context being"
+            " pushed. This has to be executed when application context is"
+            " available."
+        )
+
+    # If request specific information is available we have some extra
+    # features that support "relative" URLs.
+    if reqctx is not None:
+        url_adapter = reqctx.url_adapter
+        blueprint_name = request.blueprint
+
+        if endpoint[:1] == ".":
+            if blueprint_name is not None:
+                endpoint = blueprint_name + endpoint
+            else:
+                endpoint = endpoint[1:]
+
+        external = values.pop("_external", False)
+
+    # Otherwise go with the url adapter from the appctx and make
+    # the URLs external by default.
+    else:
+        url_adapter = appctx.url_adapter
+
+        if url_adapter is None:
+            raise RuntimeError(
+                "Application was not able to create a URL adapter for request"
+                " independent URL generation. You might be able to fix this by"
+                " setting the SERVER_NAME config variable."
+            )
+
+        external = values.pop("_external", True)
+
+    anchor = values.pop("_anchor", None)
+    method = values.pop("_method", None)
+    scheme = values.pop("_scheme", None)
+    appctx.app.inject_url_defaults(endpoint, values)
+
+    # This is not the best way to deal with this but currently the
+    # underlying Werkzeug router does not support overriding the scheme on
+    # a per build call basis.
+    old_scheme = None
+    if scheme is not None:
+        if not external:
+            raise ValueError("When specifying _scheme, _external must be True")
+        old_scheme = url_adapter.url_scheme
+        url_adapter.url_scheme = scheme
+
+    try:
+        try:
+            rv = url_adapter.build(
+                endpoint, values, method=method, force_external=external
+            )
+        finally:
+            if old_scheme is not None:
+                url_adapter.url_scheme = old_scheme
+    except BuildError as error:
+        # We need to inject the values again so that the app callback can
+        # deal with that sort of stuff.
+        values["_external"] = external
+        values["_anchor"] = anchor
+        values["_method"] = method
+        values["_scheme"] = scheme
+        return appctx.app.handle_url_build_error(error, endpoint, values)
+
+    if anchor is not None:
+        rv += "#" + url_quote(anchor)
+    return rv
+
+
+def get_template_attribute(template_name, attribute):
+    """Loads a macro (or variable) a template exports.  This can be used to
+    invoke a macro from within Python code.  If you for example have a
+    template named :file:`_cider.html` with the following contents:
+
+    .. sourcecode:: html+jinja
+
+       {% macro hello(name) %}Hello {{ name }}!{% endmacro %}
+
+    You can access this from Python code like this::
+
+        hello = get_template_attribute('_cider.html', 'hello')
+        return hello('World')
+
+    .. versionadded:: 0.2
+
+    :param template_name: the name of the template
+    :param attribute: the name of the variable of macro to access
+    """
+    return getattr(current_app.jinja_env.get_template(template_name).module, attribute)
+
+
+def flash(message, category="message"):
+    """Flashes a message to the next request.  In order to remove the
+    flashed message from the session and to display it to the user,
+    the template has to call :func:`get_flashed_messages`.
+
+    .. versionchanged:: 0.3
+       `category` parameter added.
+
+    :param message: the message to be flashed.
+    :param category: the category for the message.  The following values
+                     are recommended: ``'message'`` for any kind of message,
+                     ``'error'`` for errors, ``'info'`` for information
+                     messages and ``'warning'`` for warnings.  However any
+                     kind of string can be used as category.
+    """
+    # Original implementation:
+    #
+    #     session.setdefault('_flashes', []).append((category, message))
+    #
+    # This assumed that changes made to mutable structures in the session are
+    # always in sync with the session object, which is not true for session
+    # implementations that use external storage for keeping their keys/values.
+    flashes = session.get("_flashes", [])
+    flashes.append((category, message))
+    session["_flashes"] = flashes
+    message_flashed.send(
+        current_app._get_current_object(), message=message, category=category
+    )
+
+
+def get_flashed_messages(with_categories=False, category_filter=()):
+    """Pulls all flashed messages from the session and returns them.
+    Further calls in the same request to the function will return
+    the same messages.  By default just the messages are returned,
+    but when `with_categories` is set to ``True``, the return value will
+    be a list of tuples in the form ``(category, message)`` instead.
+
+    Filter the flashed messages to one or more categories by providing those
+    categories in `category_filter`.  This allows rendering categories in
+    separate html blocks.  The `with_categories` and `category_filter`
+    arguments are distinct:
+
+    * `with_categories` controls whether categories are returned with message
+      text (``True`` gives a tuple, where ``False`` gives just the message text).
+    * `category_filter` filters the messages down to only those matching the
+      provided categories.
+
+    See :ref:`message-flashing-pattern` for examples.
+
+    .. versionchanged:: 0.3
+       `with_categories` parameter added.
+
+    .. versionchanged:: 0.9
+        `category_filter` parameter added.
+
+    :param with_categories: set to ``True`` to also receive categories.
+    :param category_filter: whitelist of categories to limit return values
+    """
+    flashes = _request_ctx_stack.top.flashes
+    if flashes is None:
+        _request_ctx_stack.top.flashes = flashes = (
+            session.pop("_flashes") if "_flashes" in session else []
+        )
+    if category_filter:
+        flashes = list(filter(lambda f: f[0] in category_filter, flashes))
+    if not with_categories:
+        return [x[1] for x in flashes]
+    return flashes
+
+
+def send_file(
+    filename_or_fp,
+    mimetype=None,
+    as_attachment=False,
+    attachment_filename=None,
+    add_etags=True,
+    cache_timeout=None,
+    conditional=False,
+    last_modified=None,
+):
+    """Sends the contents of a file to the client.  This will use the
+    most efficient method available and configured.  By default it will
+    try to use the WSGI server's file_wrapper support.  Alternatively
+    you can set the application's :attr:`~Flask.use_x_sendfile` attribute
+    to ``True`` to directly emit an ``X-Sendfile`` header.  This however
+    requires support of the underlying webserver for ``X-Sendfile``.
+
+    By default it will try to guess the mimetype for you, but you can
+    also explicitly provide one.  For extra security you probably want
+    to send certain files as attachment (HTML for instance).  The mimetype
+    guessing requires a `filename` or an `attachment_filename` to be
+    provided.
+
+    ETags will also be attached automatically if a `filename` is provided. You
+    can turn this off by setting `add_etags=False`.
+
+    If `conditional=True` and `filename` is provided, this method will try to
+    upgrade the response stream to support range requests.  This will allow
+    the request to be answered with partial content response.
+
+    Please never pass filenames to this function from user sources;
+    you should use :func:`send_from_directory` instead.
+
+    .. versionadded:: 0.2
+
+    .. versionadded:: 0.5
+       The `add_etags`, `cache_timeout` and `conditional` parameters were
+       added.  The default behavior is now to attach etags.
+
+    .. versionchanged:: 0.7
+       mimetype guessing and etag support for file objects was
+       deprecated because it was unreliable.  Pass a filename if you are
+       able to, otherwise attach an etag yourself.  This functionality
+       will be removed in Flask 1.0
+
+    .. versionchanged:: 0.9
+       cache_timeout pulls its default from application config, when None.
+
+    .. versionchanged:: 0.12
+       The filename is no longer automatically inferred from file objects. If
+       you want to use automatic mimetype and etag support, pass a filepath via
+       `filename_or_fp` or `attachment_filename`.
+
+    .. versionchanged:: 0.12
+       The `attachment_filename` is preferred over `filename` for MIME-type
+       detection.
+
+    .. versionchanged:: 1.0
+        UTF-8 filenames, as specified in `RFC 2231`_, are supported.
+
+    .. _RFC 2231: https://tools.ietf.org/html/rfc2231#section-4
+
+    .. versionchanged:: 1.0.3
+        Filenames are encoded with ASCII instead of Latin-1 for broader
+        compatibility with WSGI servers.
+
+    .. versionchanged:: 1.1
+        Filename may be a :class:`~os.PathLike` object.
+
+    .. versionadded:: 1.1
+        Partial content supports :class:`~io.BytesIO`.
+
+    :param filename_or_fp: the filename of the file to send.
+                           This is relative to the :attr:`~Flask.root_path`
+                           if a relative path is specified.
+                           Alternatively a file object might be provided in
+                           which case ``X-Sendfile`` might not work and fall
+                           back to the traditional method.  Make sure that the
+                           file pointer is positioned at the start of data to
+                           send before calling :func:`send_file`.
+    :param mimetype: the mimetype of the file if provided. If a file path is
+                     given, auto detection happens as fallback, otherwise an
+                     error will be raised.
+    :param as_attachment: set to ``True`` if you want to send this file with
+                          a ``Content-Disposition: attachment`` header.
+    :param attachment_filename: the filename for the attachment if it
+                                differs from the file's filename.
+    :param add_etags: set to ``False`` to disable attaching of etags.
+    :param conditional: set to ``True`` to enable conditional responses.
+
+    :param cache_timeout: the timeout in seconds for the headers. When ``None``
+                          (default), this value is set by
+                          :meth:`~Flask.get_send_file_max_age` of
+                          :data:`~flask.current_app`.
+    :param last_modified: set the ``Last-Modified`` header to this value,
+        a :class:`~datetime.datetime` or timestamp.
+        If a file was passed, this overrides its mtime.
+    """
+    mtime = None
+    fsize = None
+
+    if hasattr(filename_or_fp, "__fspath__"):
+        filename_or_fp = fspath(filename_or_fp)
+
+    if isinstance(filename_or_fp, string_types):
+        filename = filename_or_fp
+        if not os.path.isabs(filename):
+            filename = os.path.join(current_app.root_path, filename)
+        file = None
+        if attachment_filename is None:
+            attachment_filename = os.path.basename(filename)
+    else:
+        file = filename_or_fp
+        filename = None
+
+    if mimetype is None:
+        if attachment_filename is not None:
+            mimetype = (
+                mimetypes.guess_type(attachment_filename)[0]
+                or "application/octet-stream"
+            )
+
+        if mimetype is None:
+            raise ValueError(
+                "Unable to infer MIME-type because no filename is available. "
+                "Please set either `attachment_filename`, pass a filepath to "
+                "`filename_or_fp` or set your own MIME-type via `mimetype`."
+            )
+
+    headers = Headers()
+    if as_attachment:
+        if attachment_filename is None:
+            raise TypeError("filename unavailable, required for sending as attachment")
+
+        if not isinstance(attachment_filename, text_type):
+            attachment_filename = attachment_filename.decode("utf-8")
+
+        try:
+            attachment_filename = attachment_filename.encode("ascii")
+        except UnicodeEncodeError:
+            filenames = {
+                "filename": unicodedata.normalize("NFKD", attachment_filename).encode(
+                    "ascii", "ignore"
+                ),
+                "filename*": "UTF-8''%s" % url_quote(attachment_filename, safe=b""),
+            }
+        else:
+            filenames = {"filename": attachment_filename}
+
+        headers.add("Content-Disposition", "attachment", **filenames)
+
+    if current_app.use_x_sendfile and filename:
+        if file is not None:
+            file.close()
+        headers["X-Sendfile"] = filename
+        fsize = os.path.getsize(filename)
+        headers["Content-Length"] = fsize
+        data = None
+    else:
+        if file is None:
+            file = open(filename, "rb")
+            mtime = os.path.getmtime(filename)
+            fsize = os.path.getsize(filename)
+            headers["Content-Length"] = fsize
+        elif isinstance(file, io.BytesIO):
+            try:
+                fsize = file.getbuffer().nbytes
+            except AttributeError:
+                # Python 2 doesn't have getbuffer
+                fsize = len(file.getvalue())
+            headers["Content-Length"] = fsize
+        data = wrap_file(request.environ, file)
+
+    rv = current_app.response_class(
+        data, mimetype=mimetype, headers=headers, direct_passthrough=True
+    )
+
+    if last_modified is not None:
+        rv.last_modified = last_modified
+    elif mtime is not None:
+        rv.last_modified = mtime
+
+    rv.cache_control.public = True
+    if cache_timeout is None:
+        cache_timeout = current_app.get_send_file_max_age(filename)
+    if cache_timeout is not None:
+        rv.cache_control.max_age = cache_timeout
+        rv.expires = int(time() + cache_timeout)
+
+    if add_etags and filename is not None:
+        from warnings import warn
+
+        try:
+            rv.set_etag(
+                "%s-%s-%s"
+                % (
+                    os.path.getmtime(filename),
+                    os.path.getsize(filename),
+                    adler32(
+                        filename.encode("utf-8")
+                        if isinstance(filename, text_type)
+                        else filename
+                    )
+                    & 0xFFFFFFFF,
+                )
+            )
+        except OSError:
+            warn(
+                "Access %s failed, maybe it does not exist, so ignore etags in "
+                "headers" % filename,
+                stacklevel=2,
+            )
+
+    if conditional:
+        try:
+            rv = rv.make_conditional(request, accept_ranges=True, complete_length=fsize)
+        except RequestedRangeNotSatisfiable:
+            if file is not None:
+                file.close()
+            raise
+        # make sure we don't send x-sendfile for servers that
+        # ignore the 304 status code for x-sendfile.
+        if rv.status_code == 304:
+            rv.headers.pop("x-sendfile", None)
+    return rv
+
+
+def safe_join(directory, *pathnames):
+    """Safely join `directory` and zero or more untrusted `pathnames`
+    components.
+
+    Example usage::
+
+        @app.route('/wiki/<path:filename>')
+        def wiki_page(filename):
+            filename = safe_join(app.config['WIKI_FOLDER'], filename)
+            with open(filename, 'rb') as fd:
+                content = fd.read()  # Read and process the file content...
+
+    :param directory: the trusted base directory.
+    :param pathnames: the untrusted pathnames relative to that directory.
+    :raises: :class:`~werkzeug.exceptions.NotFound` if one or more passed
+            paths fall out of its boundaries.
+    """
+
+    parts = [directory]
+
+    for filename in pathnames:
+        if filename != "":
+            filename = posixpath.normpath(filename)
+
+        if (
+            any(sep in filename for sep in _os_alt_seps)
+            or os.path.isabs(filename)
+            or filename == ".."
+            or filename.startswith("../")
+        ):
+            raise NotFound()
+
+        parts.append(filename)
+
+    return posixpath.join(*parts)
+
+
+def send_from_directory(directory, filename, **options):
+    """Send a file from a given directory with :func:`send_file`.  This
+    is a secure way to quickly expose static files from an upload folder
+    or something similar.
+
+    Example usage::
+
+        @app.route('/uploads/<path:filename>')
+        def download_file(filename):
+            return send_from_directory(app.config['UPLOAD_FOLDER'],
+                                       filename, as_attachment=True)
+
+    .. admonition:: Sending files and Performance
+
+       It is strongly recommended to activate either ``X-Sendfile`` support in
+       your webserver or (if no authentication happens) to tell the webserver
+       to serve files for the given path on its own without calling into the
+       web application for improved performance.
+
+    .. versionadded:: 0.5
+
+    :param directory: the directory where all the files are stored.
+    :param filename: the filename relative to that directory to
+                     download.
+    :param options: optional keyword arguments that are directly
+                    forwarded to :func:`send_file`.
+    """
+    filename = fspath(filename)
+    directory = fspath(directory)
+    filename = safe_join(directory, filename)
+    if not os.path.isabs(filename):
+        filename = os.path.join(current_app.root_path, filename)
+    try:
+        if not os.path.isfile(filename):
+            raise NotFound()
+    except (TypeError, ValueError):
+        raise BadRequest()
+    options.setdefault("conditional", True)
+    return send_file(filename, **options)
+
+
+def get_root_path(import_name):
+    """Returns the path to a package or cwd if that cannot be found.  This
+    returns the path of a package or the folder that contains a module.
+
+    Not to be confused with the package path returned by :func:`find_package`.
+    """
+    # Module already imported and has a file attribute.  Use that first.
+    mod = sys.modules.get(import_name)
+    if mod is not None and hasattr(mod, "__file__"):
+        return os.path.dirname(os.path.abspath(mod.__file__))
+
+    # Next attempt: check the loader.
+    loader = pkgutil.get_loader(import_name)
+
+    # Loader does not exist or we're referring to an unloaded main module
+    # or a main module without path (interactive sessions), go with the
+    # current working directory.
+    if loader is None or import_name == "__main__":
+        return os.getcwd()
+
+    # For .egg, zipimporter does not have get_filename until Python 2.7.
+    # Some other loaders might exhibit the same behavior.
+    if hasattr(loader, "get_filename"):
+        filepath = loader.get_filename(import_name)
+    else:
+        # Fall back to imports.
+        __import__(import_name)
+        mod = sys.modules[import_name]
+        filepath = getattr(mod, "__file__", None)
+
+        # If we don't have a filepath it might be because we are a
+        # namespace package.  In this case we pick the root path from the
+        # first module that is contained in our package.
+        if filepath is None:
+            raise RuntimeError(
+                "No root path can be found for the provided "
+                'module "%s".  This can happen because the '
+                "module came from an import hook that does "
+                "not provide file name information or because "
+                "it's a namespace package.  In this case "
+                "the root path needs to be explicitly "
+                "provided." % import_name
+            )
+
+    # filepath is import_name.py for a module, or __init__.py for a package.
+    return os.path.dirname(os.path.abspath(filepath))
+
+
+def _matching_loader_thinks_module_is_package(loader, mod_name):
+    """Given the loader that loaded a module and the module this function
+    attempts to figure out if the given module is actually a package.
+    """
+    # If the loader can tell us if something is a package, we can
+    # directly ask the loader.
+    if hasattr(loader, "is_package"):
+        return loader.is_package(mod_name)
+    # importlib's namespace loaders do not have this functionality but
+    # all the modules it loads are packages, so we can take advantage of
+    # this information.
+    elif (
+        loader.__class__.__module__ == "_frozen_importlib"
+        and loader.__class__.__name__ == "NamespaceLoader"
+    ):
+        return True
+    # Otherwise we need to fail with an error that explains what went
+    # wrong.
+    raise AttributeError(
+        (
+            "%s.is_package() method is missing but is required by Flask of "
+            "PEP 302 import hooks.  If you do not use import hooks and "
+            "you encounter this error please file a bug against Flask."
+        )
+        % loader.__class__.__name__
+    )
+
+
+def _find_package_path(root_mod_name):
+    """Find the path where the module's root exists in"""
+    if sys.version_info >= (3, 4):
+        import importlib.util
+
+        try:
+            spec = importlib.util.find_spec(root_mod_name)
+            if spec is None:
+                raise ValueError("not found")
+        # ImportError: the machinery told us it does not exist
+        # ValueError:
+        #    - the module name was invalid
+        #    - the module name is __main__
+        #    - *we* raised `ValueError` due to `spec` being `None`
+        except (ImportError, ValueError):
+            pass  # handled below
+        else:
+            # namespace package
+            if spec.origin in {"namespace", None}:
+                return os.path.dirname(next(iter(spec.submodule_search_locations)))
+            # a package (with __init__.py)
+            elif spec.submodule_search_locations:
+                return os.path.dirname(os.path.dirname(spec.origin))
+            # just a normal module
+            else:
+                return os.path.dirname(spec.origin)
+
+    # we were unable to find the `package_path` using PEP 451 loaders
+    loader = pkgutil.get_loader(root_mod_name)
+    if loader is None or root_mod_name == "__main__":
+        # import name is not found, or interactive/main module
+        return os.getcwd()
+    else:
+        # For .egg, zipimporter does not have get_filename until Python 2.7.
+        if hasattr(loader, "get_filename"):
+            filename = loader.get_filename(root_mod_name)
+        elif hasattr(loader, "archive"):
+            # zipimporter's loader.archive points to the .egg or .zip
+            # archive filename is dropped in call to dirname below.
+            filename = loader.archive
+        else:
+            # At least one loader is missing both get_filename and archive:
+            # Google App Engine's HardenedModulesHook
+            #
+            # Fall back to imports.
+            __import__(root_mod_name)
+            filename = sys.modules[root_mod_name].__file__
+        package_path = os.path.abspath(os.path.dirname(filename))
+
+        # In case the root module is a package we need to chop of the
+        # rightmost part.  This needs to go through a helper function
+        # because of python 3.3 namespace packages.
+        if _matching_loader_thinks_module_is_package(loader, root_mod_name):
+            package_path = os.path.dirname(package_path)
+
+    return package_path
+
+
+def find_package(import_name):
+    """Finds a package and returns the prefix (or None if the package is
+    not installed) as well as the folder that contains the package or
+    module as a tuple.  The package path returned is the module that would
+    have to be added to the pythonpath in order to make it possible to
+    import the module.  The prefix is the path below which a UNIX like
+    folder structure exists (lib, share etc.).
+    """
+    root_mod_name, _, _ = import_name.partition(".")
+    package_path = _find_package_path(root_mod_name)
+    site_parent, site_folder = os.path.split(package_path)
+    py_prefix = os.path.abspath(sys.prefix)
+    if package_path.startswith(py_prefix):
+        return py_prefix, package_path
+    elif site_folder.lower() == "site-packages":
+        parent, folder = os.path.split(site_parent)
+        # Windows like installations
+        if folder.lower() == "lib":
+            base_dir = parent
+        # UNIX like installations
+        elif os.path.basename(parent).lower() == "lib":
+            base_dir = os.path.dirname(parent)
+        else:
+            base_dir = site_parent
+        return base_dir, package_path
+    return None, package_path
+
+
+class locked_cached_property(object):
+    """A decorator that converts a function into a lazy property.  The
+    function wrapped is called the first time to retrieve the result
+    and then that calculated result is used the next time you access
+    the value.  Works like the one in Werkzeug but has a lock for
+    thread safety.
+    """
+
+    def __init__(self, func, name=None, doc=None):
+        self.__name__ = name or func.__name__
+        self.__module__ = func.__module__
+        self.__doc__ = doc or func.__doc__
+        self.func = func
+        self.lock = RLock()
+
+    def __get__(self, obj, type=None):
+        if obj is None:
+            return self
+        with self.lock:
+            value = obj.__dict__.get(self.__name__, _missing)
+            if value is _missing:
+                value = self.func(obj)
+                obj.__dict__[self.__name__] = value
+            return value
+
+
+class _PackageBoundObject(object):
+    #: The name of the package or module that this app belongs to. Do not
+    #: change this once it is set by the constructor.
+    import_name = None
+
+    #: Location of the template files to be added to the template lookup.
+    #: ``None`` if templates should not be added.
+    template_folder = None
+
+    #: Absolute path to the package on the filesystem. Used to look up
+    #: resources contained in the package.
+    root_path = None
+
+    def __init__(self, import_name, template_folder=None, root_path=None):
+        self.import_name = import_name
+        self.template_folder = template_folder
+
+        if root_path is None:
+            root_path = get_root_path(self.import_name)
+
+        self.root_path = root_path
+        self._static_folder = None
+        self._static_url_path = None
+
+        # circular import
+        from .cli import AppGroup
+
+        #: The Click command group for registration of CLI commands
+        #: on the application and associated blueprints. These commands
+        #: are accessible via the :command:`flask` command once the
+        #: application has been discovered and blueprints registered.
+        self.cli = AppGroup()
+
+    @property
+    def static_folder(self):
+        """The absolute path to the configured static folder."""
+        if self._static_folder is not None:
+            return os.path.join(self.root_path, self._static_folder)
+
+    @static_folder.setter
+    def static_folder(self, value):
+        if value is not None:
+            value = value.rstrip("/\\")
+        self._static_folder = value
+
+    @property
+    def static_url_path(self):
+        """The URL prefix that the static route will be accessible from.
+
+        If it was not configured during init, it is derived from
+        :attr:`static_folder`.
+        """
+        if self._static_url_path is not None:
+            return self._static_url_path
+
+        if self.static_folder is not None:
+            basename = os.path.basename(self.static_folder)
+            return ("/" + basename).rstrip("/")
+
+    @static_url_path.setter
+    def static_url_path(self, value):
+        if value is not None:
+            value = value.rstrip("/")
+
+        self._static_url_path = value
+
+    @property
+    def has_static_folder(self):
+        """This is ``True`` if the package bound object's container has a
+        folder for static files.
+
+        .. versionadded:: 0.5
+        """
+        return self.static_folder is not None
+
+    @locked_cached_property
+    def jinja_loader(self):
+        """The Jinja loader for this package bound object.
+
+        .. versionadded:: 0.5
+        """
+        if self.template_folder is not None:
+            return FileSystemLoader(os.path.join(self.root_path, self.template_folder))
+
+    def get_send_file_max_age(self, filename):
+        """Provides default cache_timeout for the :func:`send_file` functions.
+
+        By default, this function returns ``SEND_FILE_MAX_AGE_DEFAULT`` from
+        the configuration of :data:`~flask.current_app`.
+
+        Static file functions such as :func:`send_from_directory` use this
+        function, and :func:`send_file` calls this function on
+        :data:`~flask.current_app` when the given cache_timeout is ``None``. If a
+        cache_timeout is given in :func:`send_file`, that timeout is used;
+        otherwise, this method is called.
+
+        This allows subclasses to change the behavior when sending files based
+        on the filename.  For example, to set the cache timeout for .js files
+        to 60 seconds::
+
+            class MyFlask(flask.Flask):
+                def get_send_file_max_age(self, name):
+                    if name.lower().endswith('.js'):
+                        return 60
+                    return flask.Flask.get_send_file_max_age(self, name)
+
+        .. versionadded:: 0.9
+        """
+        return total_seconds(current_app.send_file_max_age_default)
+
+    def send_static_file(self, filename):
+        """Function used internally to send static files from the static
+        folder to the browser.
+
+        .. versionadded:: 0.5
+        """
+        if not self.has_static_folder:
+            raise RuntimeError("No static folder for this object")
+        # Ensure get_send_file_max_age is called in all cases.
+        # Here, we ensure get_send_file_max_age is called for Blueprints.
+        cache_timeout = self.get_send_file_max_age(filename)
+        return send_from_directory(
+            self.static_folder, filename, cache_timeout=cache_timeout
+        )
+
+    def open_resource(self, resource, mode="rb"):
+        """Opens a resource from the application's resource folder.  To see
+        how this works, consider the following folder structure::
+
+            /myapplication.py
+            /schema.sql
+            /static
+                /style.css
+            /templates
+                /layout.html
+                /index.html
+
+        If you want to open the :file:`schema.sql` file you would do the
+        following::
+
+            with app.open_resource('schema.sql') as f:
+                contents = f.read()
+                do_something_with(contents)
+
+        :param resource: the name of the resource.  To access resources within
+                         subfolders use forward slashes as separator.
+        :param mode: Open file in this mode. Only reading is supported,
+            valid values are "r" (or "rt") and "rb".
+        """
+        if mode not in {"r", "rt", "rb"}:
+            raise ValueError("Resources can only be opened for reading")
+
+        return open(os.path.join(self.root_path, resource), mode)
+
+
+def total_seconds(td):
+    """Returns the total seconds from a timedelta object.
+
+    :param timedelta td: the timedelta to be converted in seconds
+
+    :returns: number of seconds
+    :rtype: int
+    """
+    return td.days * 60 * 60 * 24 + td.seconds
+
+
+def is_ip(value):
+    """Determine if the given string is an IP address.
+
+    Python 2 on Windows doesn't provide ``inet_pton``, so this only
+    checks IPv4 addresses in that environment.
+
+    :param value: value to check
+    :type value: str
+
+    :return: True if string is an IP address
+    :rtype: bool
+    """
+    if PY2 and os.name == "nt":
+        try:
+            socket.inet_aton(value)
+            return True
+        except socket.error:
+            return False
+
+    for family in (socket.AF_INET, socket.AF_INET6):
+        try:
+            socket.inet_pton(family, value)
+        except socket.error:
+            pass
+        else:
+            return True
+
+    return False
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/json/__init__.py b/python3-vckonline/lib/python3.8/site-packages/flask/json/__init__.py
new file mode 100644
index 0000000..a141068
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/json/__init__.py
@@ -0,0 +1,376 @@
+# -*- coding: utf-8 -*-
+"""
+flask.json
+~~~~~~~~~~
+
+:copyright: 2010 Pallets
+:license: BSD-3-Clause
+"""
+import codecs
+import io
+import uuid
+from datetime import date
+from datetime import datetime
+
+from itsdangerous import json as _json
+from jinja2 import Markup
+from werkzeug.http import http_date
+
+from .._compat import PY2
+from .._compat import text_type
+from ..globals import current_app
+from ..globals import request
+
+try:
+    import dataclasses
+except ImportError:
+    dataclasses = None
+
+# Figure out if simplejson escapes slashes.  This behavior was changed
+# from one version to another without reason.
+_slash_escape = "\\/" not in _json.dumps("/")
+
+
+__all__ = [
+    "dump",
+    "dumps",
+    "load",
+    "loads",
+    "htmlsafe_dump",
+    "htmlsafe_dumps",
+    "JSONDecoder",
+    "JSONEncoder",
+    "jsonify",
+]
+
+
+def _wrap_reader_for_text(fp, encoding):
+    if isinstance(fp.read(0), bytes):
+        fp = io.TextIOWrapper(io.BufferedReader(fp), encoding)
+    return fp
+
+
+def _wrap_writer_for_text(fp, encoding):
+    try:
+        fp.write("")
+    except TypeError:
+        fp = io.TextIOWrapper(fp, encoding)
+    return fp
+
+
+class JSONEncoder(_json.JSONEncoder):
+    """The default Flask JSON encoder. This one extends the default
+    encoder by also supporting ``datetime``, ``UUID``, ``dataclasses``,
+    and ``Markup`` objects.
+
+    ``datetime`` objects are serialized as RFC 822 datetime strings.
+    This is the same as the HTTP date format.
+
+    In order to support more data types, override the :meth:`default`
+    method.
+    """
+
+    def default(self, o):
+        """Implement this method in a subclass such that it returns a
+        serializable object for ``o``, or calls the base implementation (to
+        raise a :exc:`TypeError`).
+
+        For example, to support arbitrary iterators, you could implement
+        default like this::
+
+            def default(self, o):
+                try:
+                    iterable = iter(o)
+                except TypeError:
+                    pass
+                else:
+                    return list(iterable)
+                return JSONEncoder.default(self, o)
+        """
+        if isinstance(o, datetime):
+            return http_date(o.utctimetuple())
+        if isinstance(o, date):
+            return http_date(o.timetuple())
+        if isinstance(o, uuid.UUID):
+            return str(o)
+        if dataclasses and dataclasses.is_dataclass(o):
+            return dataclasses.asdict(o)
+        if hasattr(o, "__html__"):
+            return text_type(o.__html__())
+        return _json.JSONEncoder.default(self, o)
+
+
+class JSONDecoder(_json.JSONDecoder):
+    """The default JSON decoder.  This one does not change the behavior from
+    the default simplejson decoder.  Consult the :mod:`json` documentation
+    for more information.  This decoder is not only used for the load
+    functions of this module but also :attr:`~flask.Request`.
+    """
+
+
+def _dump_arg_defaults(kwargs, app=None):
+    """Inject default arguments for dump functions."""
+    if app is None:
+        app = current_app
+
+    if app:
+        bp = app.blueprints.get(request.blueprint) if request else None
+        kwargs.setdefault(
+            "cls", bp.json_encoder if bp and bp.json_encoder else app.json_encoder
+        )
+
+        if not app.config["JSON_AS_ASCII"]:
+            kwargs.setdefault("ensure_ascii", False)
+
+        kwargs.setdefault("sort_keys", app.config["JSON_SORT_KEYS"])
+    else:
+        kwargs.setdefault("sort_keys", True)
+        kwargs.setdefault("cls", JSONEncoder)
+
+
+def _load_arg_defaults(kwargs, app=None):
+    """Inject default arguments for load functions."""
+    if app is None:
+        app = current_app
+
+    if app:
+        bp = app.blueprints.get(request.blueprint) if request else None
+        kwargs.setdefault(
+            "cls", bp.json_decoder if bp and bp.json_decoder else app.json_decoder
+        )
+    else:
+        kwargs.setdefault("cls", JSONDecoder)
+
+
+def detect_encoding(data):
+    """Detect which UTF codec was used to encode the given bytes.
+
+    The latest JSON standard (:rfc:`8259`) suggests that only UTF-8 is
+    accepted. Older documents allowed 8, 16, or 32. 16 and 32 can be big
+    or little endian. Some editors or libraries may prepend a BOM.
+
+    :param data: Bytes in unknown UTF encoding.
+    :return: UTF encoding name
+    """
+    head = data[:4]
+
+    if head[:3] == codecs.BOM_UTF8:
+        return "utf-8-sig"
+
+    if b"\x00" not in head:
+        return "utf-8"
+
+    if head in (codecs.BOM_UTF32_BE, codecs.BOM_UTF32_LE):
+        return "utf-32"
+
+    if head[:2] in (codecs.BOM_UTF16_BE, codecs.BOM_UTF16_LE):
+        return "utf-16"
+
+    if len(head) == 4:
+        if head[:3] == b"\x00\x00\x00":
+            return "utf-32-be"
+
+        if head[::2] == b"\x00\x00":
+            return "utf-16-be"
+
+        if head[1:] == b"\x00\x00\x00":
+            return "utf-32-le"
+
+        if head[1::2] == b"\x00\x00":
+            return "utf-16-le"
+
+    if len(head) == 2:
+        return "utf-16-be" if head.startswith(b"\x00") else "utf-16-le"
+
+    return "utf-8"
+
+
+def dumps(obj, app=None, **kwargs):
+    """Serialize ``obj`` to a JSON-formatted string. If there is an
+    app context pushed, use the current app's configured encoder
+    (:attr:`~flask.Flask.json_encoder`), or fall back to the default
+    :class:`JSONEncoder`.
+
+    Takes the same arguments as the built-in :func:`json.dumps`, and
+    does some extra configuration based on the application. If the
+    simplejson package is installed, it is preferred.
+
+    :param obj: Object to serialize to JSON.
+    :param app: App instance to use to configure the JSON encoder.
+        Uses ``current_app`` if not given, and falls back to the default
+        encoder when not in an app context.
+    :param kwargs: Extra arguments passed to :func:`json.dumps`.
+
+    .. versionchanged:: 1.0.3
+
+        ``app`` can be passed directly, rather than requiring an app
+        context for configuration.
+    """
+    _dump_arg_defaults(kwargs, app=app)
+    encoding = kwargs.pop("encoding", None)
+    rv = _json.dumps(obj, **kwargs)
+    if encoding is not None and isinstance(rv, text_type):
+        rv = rv.encode(encoding)
+    return rv
+
+
+def dump(obj, fp, app=None, **kwargs):
+    """Like :func:`dumps` but writes into a file object."""
+    _dump_arg_defaults(kwargs, app=app)
+    encoding = kwargs.pop("encoding", None)
+    if encoding is not None:
+        fp = _wrap_writer_for_text(fp, encoding)
+    _json.dump(obj, fp, **kwargs)
+
+
+def loads(s, app=None, **kwargs):
+    """Deserialize an object from a JSON-formatted string ``s``. If
+    there is an app context pushed, use the current app's configured
+    decoder (:attr:`~flask.Flask.json_decoder`), or fall back to the
+    default :class:`JSONDecoder`.
+
+    Takes the same arguments as the built-in :func:`json.loads`, and
+    does some extra configuration based on the application. If the
+    simplejson package is installed, it is preferred.
+
+    :param s: JSON string to deserialize.
+    :param app: App instance to use to configure the JSON decoder.
+        Uses ``current_app`` if not given, and falls back to the default
+        encoder when not in an app context.
+    :param kwargs: Extra arguments passed to :func:`json.dumps`.
+
+    .. versionchanged:: 1.0.3
+
+        ``app`` can be passed directly, rather than requiring an app
+        context for configuration.
+    """
+    _load_arg_defaults(kwargs, app=app)
+    if isinstance(s, bytes):
+        encoding = kwargs.pop("encoding", None)
+        if encoding is None:
+            encoding = detect_encoding(s)
+        s = s.decode(encoding)
+    return _json.loads(s, **kwargs)
+
+
+def load(fp, app=None, **kwargs):
+    """Like :func:`loads` but reads from a file object."""
+    _load_arg_defaults(kwargs, app=app)
+    if not PY2:
+        fp = _wrap_reader_for_text(fp, kwargs.pop("encoding", None) or "utf-8")
+    return _json.load(fp, **kwargs)
+
+
+def htmlsafe_dumps(obj, **kwargs):
+    """Works exactly like :func:`dumps` but is safe for use in ``<script>``
+    tags.  It accepts the same arguments and returns a JSON string.  Note that
+    this is available in templates through the ``|tojson`` filter which will
+    also mark the result as safe.  Due to how this function escapes certain
+    characters this is safe even if used outside of ``<script>`` tags.
+
+    The following characters are escaped in strings:
+
+    -   ``<``
+    -   ``>``
+    -   ``&``
+    -   ``'``
+
+    This makes it safe to embed such strings in any place in HTML with the
+    notable exception of double quoted attributes.  In that case single
+    quote your attributes or HTML escape it in addition.
+
+    .. versionchanged:: 0.10
+       This function's return value is now always safe for HTML usage, even
+       if outside of script tags or if used in XHTML.  This rule does not
+       hold true when using this function in HTML attributes that are double
+       quoted.  Always single quote attributes if you use the ``|tojson``
+       filter.  Alternatively use ``|tojson|forceescape``.
+    """
+    rv = (
+        dumps(obj, **kwargs)
+        .replace(u"<", u"\\u003c")
+        .replace(u">", u"\\u003e")
+        .replace(u"&", u"\\u0026")
+        .replace(u"'", u"\\u0027")
+    )
+    if not _slash_escape:
+        rv = rv.replace("\\/", "/")
+    return rv
+
+
+def htmlsafe_dump(obj, fp, **kwargs):
+    """Like :func:`htmlsafe_dumps` but writes into a file object."""
+    fp.write(text_type(htmlsafe_dumps(obj, **kwargs)))
+
+
+def jsonify(*args, **kwargs):
+    """This function wraps :func:`dumps` to add a few enhancements that make
+    life easier.  It turns the JSON output into a :class:`~flask.Response`
+    object with the :mimetype:`application/json` mimetype.  For convenience, it
+    also converts multiple arguments into an array or multiple keyword arguments
+    into a dict.  This means that both ``jsonify(1,2,3)`` and
+    ``jsonify([1,2,3])`` serialize to ``[1,2,3]``.
+
+    For clarity, the JSON serialization behavior has the following differences
+    from :func:`dumps`:
+
+    1. Single argument: Passed straight through to :func:`dumps`.
+    2. Multiple arguments: Converted to an array before being passed to
+       :func:`dumps`.
+    3. Multiple keyword arguments: Converted to a dict before being passed to
+       :func:`dumps`.
+    4. Both args and kwargs: Behavior undefined and will throw an exception.
+
+    Example usage::
+
+        from flask import jsonify
+
+        @app.route('/_get_current_user')
+        def get_current_user():
+            return jsonify(username=g.user.username,
+                           email=g.user.email,
+                           id=g.user.id)
+
+    This will send a JSON response like this to the browser::
+
+        {
+            "username": "admin",
+            "email": "admin@localhost",
+            "id": 42
+        }
+
+
+    .. versionchanged:: 0.11
+       Added support for serializing top-level arrays. This introduces a
+       security risk in ancient browsers. See :ref:`json-security` for details.
+
+    This function's response will be pretty printed if the
+    ``JSONIFY_PRETTYPRINT_REGULAR`` config parameter is set to True or the
+    Flask app is running in debug mode. Compressed (not pretty) formatting
+    currently means no indents and no spaces after separators.
+
+    .. versionadded:: 0.2
+    """
+
+    indent = None
+    separators = (",", ":")
+
+    if current_app.config["JSONIFY_PRETTYPRINT_REGULAR"] or current_app.debug:
+        indent = 2
+        separators = (", ", ": ")
+
+    if args and kwargs:
+        raise TypeError("jsonify() behavior undefined when passed both args and kwargs")
+    elif len(args) == 1:  # single args are passed directly to dumps()
+        data = args[0]
+    else:
+        data = args or kwargs
+
+    return current_app.response_class(
+        dumps(data, indent=indent, separators=separators) + "\n",
+        mimetype=current_app.config["JSONIFY_MIMETYPE"],
+    )
+
+
+def tojson_filter(obj, **kwargs):
+    return Markup(htmlsafe_dumps(obj, **kwargs))
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/json/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/flask/json/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..51fe70d
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diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/json/__pycache__/tag.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/flask/json/__pycache__/tag.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/json/tag.py b/python3-vckonline/lib/python3.8/site-packages/flask/json/tag.py
new file mode 100644
index 0000000..5f338d9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/json/tag.py
@@ -0,0 +1,309 @@
+# -*- coding: utf-8 -*-
+"""
+Tagged JSON
+~~~~~~~~~~~
+
+A compact representation for lossless serialization of non-standard JSON types.
+:class:`~flask.sessions.SecureCookieSessionInterface` uses this to serialize
+the session data, but it may be useful in other places. It can be extended to
+support other types.
+
+.. autoclass:: TaggedJSONSerializer
+    :members:
+
+.. autoclass:: JSONTag
+    :members:
+
+Let's seen an example that adds support for :class:`~collections.OrderedDict`.
+Dicts don't have an order in Python or JSON, so to handle this we will dump
+the items as a list of ``[key, value]`` pairs. Subclass :class:`JSONTag` and
+give it the new key ``' od'`` to identify the type. The session serializer
+processes dicts first, so insert the new tag at the front of the order since
+``OrderedDict`` must be processed before ``dict``. ::
+
+    from flask.json.tag import JSONTag
+
+    class TagOrderedDict(JSONTag):
+        __slots__ = ('serializer',)
+        key = ' od'
+
+        def check(self, value):
+            return isinstance(value, OrderedDict)
+
+        def to_json(self, value):
+            return [[k, self.serializer.tag(v)] for k, v in iteritems(value)]
+
+        def to_python(self, value):
+            return OrderedDict(value)
+
+    app.session_interface.serializer.register(TagOrderedDict, index=0)
+
+:copyright: 2010 Pallets
+:license: BSD-3-Clause
+"""
+from base64 import b64decode
+from base64 import b64encode
+from datetime import datetime
+from uuid import UUID
+
+from jinja2 import Markup
+from werkzeug.http import http_date
+from werkzeug.http import parse_date
+
+from .._compat import iteritems
+from .._compat import text_type
+from ..json import dumps
+from ..json import loads
+
+
+class JSONTag(object):
+    """Base class for defining type tags for :class:`TaggedJSONSerializer`."""
+
+    __slots__ = ("serializer",)
+
+    #: The tag to mark the serialized object with. If ``None``, this tag is
+    #: only used as an intermediate step during tagging.
+    key = None
+
+    def __init__(self, serializer):
+        """Create a tagger for the given serializer."""
+        self.serializer = serializer
+
+    def check(self, value):
+        """Check if the given value should be tagged by this tag."""
+        raise NotImplementedError
+
+    def to_json(self, value):
+        """Convert the Python object to an object that is a valid JSON type.
+        The tag will be added later."""
+        raise NotImplementedError
+
+    def to_python(self, value):
+        """Convert the JSON representation back to the correct type. The tag
+        will already be removed."""
+        raise NotImplementedError
+
+    def tag(self, value):
+        """Convert the value to a valid JSON type and add the tag structure
+        around it."""
+        return {self.key: self.to_json(value)}
+
+
+class TagDict(JSONTag):
+    """Tag for 1-item dicts whose only key matches a registered tag.
+
+    Internally, the dict key is suffixed with `__`, and the suffix is removed
+    when deserializing.
+    """
+
+    __slots__ = ()
+    key = " di"
+
+    def check(self, value):
+        return (
+            isinstance(value, dict)
+            and len(value) == 1
+            and next(iter(value)) in self.serializer.tags
+        )
+
+    def to_json(self, value):
+        key = next(iter(value))
+        return {key + "__": self.serializer.tag(value[key])}
+
+    def to_python(self, value):
+        key = next(iter(value))
+        return {key[:-2]: value[key]}
+
+
+class PassDict(JSONTag):
+    __slots__ = ()
+
+    def check(self, value):
+        return isinstance(value, dict)
+
+    def to_json(self, value):
+        # JSON objects may only have string keys, so don't bother tagging the
+        # key here.
+        return dict((k, self.serializer.tag(v)) for k, v in iteritems(value))
+
+    tag = to_json
+
+
+class TagTuple(JSONTag):
+    __slots__ = ()
+    key = " t"
+
+    def check(self, value):
+        return isinstance(value, tuple)
+
+    def to_json(self, value):
+        return [self.serializer.tag(item) for item in value]
+
+    def to_python(self, value):
+        return tuple(value)
+
+
+class PassList(JSONTag):
+    __slots__ = ()
+
+    def check(self, value):
+        return isinstance(value, list)
+
+    def to_json(self, value):
+        return [self.serializer.tag(item) for item in value]
+
+    tag = to_json
+
+
+class TagBytes(JSONTag):
+    __slots__ = ()
+    key = " b"
+
+    def check(self, value):
+        return isinstance(value, bytes)
+
+    def to_json(self, value):
+        return b64encode(value).decode("ascii")
+
+    def to_python(self, value):
+        return b64decode(value)
+
+
+class TagMarkup(JSONTag):
+    """Serialize anything matching the :class:`~flask.Markup` API by
+    having a ``__html__`` method to the result of that method. Always
+    deserializes to an instance of :class:`~flask.Markup`."""
+
+    __slots__ = ()
+    key = " m"
+
+    def check(self, value):
+        return callable(getattr(value, "__html__", None))
+
+    def to_json(self, value):
+        return text_type(value.__html__())
+
+    def to_python(self, value):
+        return Markup(value)
+
+
+class TagUUID(JSONTag):
+    __slots__ = ()
+    key = " u"
+
+    def check(self, value):
+        return isinstance(value, UUID)
+
+    def to_json(self, value):
+        return value.hex
+
+    def to_python(self, value):
+        return UUID(value)
+
+
+class TagDateTime(JSONTag):
+    __slots__ = ()
+    key = " d"
+
+    def check(self, value):
+        return isinstance(value, datetime)
+
+    def to_json(self, value):
+        return http_date(value)
+
+    def to_python(self, value):
+        return parse_date(value)
+
+
+class TaggedJSONSerializer(object):
+    """Serializer that uses a tag system to compactly represent objects that
+    are not JSON types. Passed as the intermediate serializer to
+    :class:`itsdangerous.Serializer`.
+
+    The following extra types are supported:
+
+    * :class:`dict`
+    * :class:`tuple`
+    * :class:`bytes`
+    * :class:`~flask.Markup`
+    * :class:`~uuid.UUID`
+    * :class:`~datetime.datetime`
+    """
+
+    __slots__ = ("tags", "order")
+
+    #: Tag classes to bind when creating the serializer. Other tags can be
+    #: added later using :meth:`~register`.
+    default_tags = [
+        TagDict,
+        PassDict,
+        TagTuple,
+        PassList,
+        TagBytes,
+        TagMarkup,
+        TagUUID,
+        TagDateTime,
+    ]
+
+    def __init__(self):
+        self.tags = {}
+        self.order = []
+
+        for cls in self.default_tags:
+            self.register(cls)
+
+    def register(self, tag_class, force=False, index=None):
+        """Register a new tag with this serializer.
+
+        :param tag_class: tag class to register. Will be instantiated with this
+            serializer instance.
+        :param force: overwrite an existing tag. If false (default), a
+            :exc:`KeyError` is raised.
+        :param index: index to insert the new tag in the tag order. Useful when
+            the new tag is a special case of an existing tag. If ``None``
+            (default), the tag is appended to the end of the order.
+
+        :raise KeyError: if the tag key is already registered and ``force`` is
+            not true.
+        """
+        tag = tag_class(self)
+        key = tag.key
+
+        if key is not None:
+            if not force and key in self.tags:
+                raise KeyError("Tag '{0}' is already registered.".format(key))
+
+            self.tags[key] = tag
+
+        if index is None:
+            self.order.append(tag)
+        else:
+            self.order.insert(index, tag)
+
+    def tag(self, value):
+        """Convert a value to a tagged representation if necessary."""
+        for tag in self.order:
+            if tag.check(value):
+                return tag.tag(value)
+
+        return value
+
+    def untag(self, value):
+        """Convert a tagged representation back to the original type."""
+        if len(value) != 1:
+            return value
+
+        key = next(iter(value))
+
+        if key not in self.tags:
+            return value
+
+        return self.tags[key].to_python(value[key])
+
+    def dumps(self, value):
+        """Tag the value and dump it to a compact JSON string."""
+        return dumps(self.tag(value), separators=(",", ":"))
+
+    def loads(self, value):
+        """Load data from a JSON string and deserialized any tagged objects."""
+        return loads(value, object_hook=self.untag)
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/logging.py b/python3-vckonline/lib/python3.8/site-packages/flask/logging.py
new file mode 100644
index 0000000..adaba10
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/logging.py
@@ -0,0 +1,109 @@
+# -*- coding: utf-8 -*-
+"""
+flask.logging
+~~~~~~~~~~~~~
+
+:copyright: 2010 Pallets
+:license: BSD-3-Clause
+"""
+from __future__ import absolute_import
+
+import logging
+import sys
+import warnings
+
+from werkzeug.local import LocalProxy
+
+from .globals import request
+
+
+@LocalProxy
+def wsgi_errors_stream():
+    """Find the most appropriate error stream for the application. If a request
+    is active, log to ``wsgi.errors``, otherwise use ``sys.stderr``.
+
+    If you configure your own :class:`logging.StreamHandler`, you may want to
+    use this for the stream. If you are using file or dict configuration and
+    can't import this directly, you can refer to it as
+    ``ext://flask.logging.wsgi_errors_stream``.
+    """
+    return request.environ["wsgi.errors"] if request else sys.stderr
+
+
+def has_level_handler(logger):
+    """Check if there is a handler in the logging chain that will handle the
+    given logger's :meth:`effective level <~logging.Logger.getEffectiveLevel>`.
+    """
+    level = logger.getEffectiveLevel()
+    current = logger
+
+    while current:
+        if any(handler.level <= level for handler in current.handlers):
+            return True
+
+        if not current.propagate:
+            break
+
+        current = current.parent
+
+    return False
+
+
+#: Log messages to :func:`~flask.logging.wsgi_errors_stream` with the format
+#: ``[%(asctime)s] %(levelname)s in %(module)s: %(message)s``.
+default_handler = logging.StreamHandler(wsgi_errors_stream)
+default_handler.setFormatter(
+    logging.Formatter("[%(asctime)s] %(levelname)s in %(module)s: %(message)s")
+)
+
+
+def _has_config(logger):
+    """Decide if a logger has direct configuration applied by checking
+    its properties against the defaults.
+
+    :param logger: The :class:`~logging.Logger` to inspect.
+    """
+    return (
+        logger.level != logging.NOTSET
+        or logger.handlers
+        or logger.filters
+        or not logger.propagate
+    )
+
+
+def create_logger(app):
+    """Get the the Flask apps's logger and configure it if needed.
+
+    The logger name will be the same as
+    :attr:`app.import_name <flask.Flask.name>`.
+
+    When :attr:`~flask.Flask.debug` is enabled, set the logger level to
+    :data:`logging.DEBUG` if it is not set.
+
+    If there is no handler for the logger's effective level, add a
+    :class:`~logging.StreamHandler` for
+    :func:`~flask.logging.wsgi_errors_stream` with a basic format.
+    """
+    logger = logging.getLogger(app.name)
+
+    # 1.1.0 changes name of logger, warn if config is detected for old
+    # name and not new name
+    for old_name in ("flask.app", "flask"):
+        old_logger = logging.getLogger(old_name)
+
+        if _has_config(old_logger) and not _has_config(logger):
+            warnings.warn(
+                "'app.logger' is named '{name}' for this application,"
+                " but configuration was found for '{old_name}', which"
+                " no longer has an effect. The logging configuration"
+                " should be moved to '{name}'.".format(name=app.name, old_name=old_name)
+            )
+            break
+
+    if app.debug and not logger.level:
+        logger.setLevel(logging.DEBUG)
+
+    if not has_level_handler(logger):
+        logger.addHandler(default_handler)
+
+    return logger
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/sessions.py b/python3-vckonline/lib/python3.8/site-packages/flask/sessions.py
new file mode 100644
index 0000000..c57ba29
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/sessions.py
@@ -0,0 +1,388 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.sessions
+    ~~~~~~~~~~~~~~
+
+    Implements cookie based sessions based on itsdangerous.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+import hashlib
+import warnings
+from datetime import datetime
+
+from itsdangerous import BadSignature
+from itsdangerous import URLSafeTimedSerializer
+from werkzeug.datastructures import CallbackDict
+
+from ._compat import collections_abc
+from .helpers import is_ip
+from .helpers import total_seconds
+from .json.tag import TaggedJSONSerializer
+
+
+class SessionMixin(collections_abc.MutableMapping):
+    """Expands a basic dictionary with session attributes."""
+
+    @property
+    def permanent(self):
+        """This reflects the ``'_permanent'`` key in the dict."""
+        return self.get("_permanent", False)
+
+    @permanent.setter
+    def permanent(self, value):
+        self["_permanent"] = bool(value)
+
+    #: Some implementations can detect whether a session is newly
+    #: created, but that is not guaranteed. Use with caution. The mixin
+    # default is hard-coded ``False``.
+    new = False
+
+    #: Some implementations can detect changes to the session and set
+    #: this when that happens. The mixin default is hard coded to
+    #: ``True``.
+    modified = True
+
+    #: Some implementations can detect when session data is read or
+    #: written and set this when that happens. The mixin default is hard
+    #: coded to ``True``.
+    accessed = True
+
+
+class SecureCookieSession(CallbackDict, SessionMixin):
+    """Base class for sessions based on signed cookies.
+
+    This session backend will set the :attr:`modified` and
+    :attr:`accessed` attributes. It cannot reliably track whether a
+    session is new (vs. empty), so :attr:`new` remains hard coded to
+    ``False``.
+    """
+
+    #: When data is changed, this is set to ``True``. Only the session
+    #: dictionary itself is tracked; if the session contains mutable
+    #: data (for example a nested dict) then this must be set to
+    #: ``True`` manually when modifying that data. The session cookie
+    #: will only be written to the response if this is ``True``.
+    modified = False
+
+    #: When data is read or written, this is set to ``True``. Used by
+    # :class:`.SecureCookieSessionInterface` to add a ``Vary: Cookie``
+    #: header, which allows caching proxies to cache different pages for
+    #: different users.
+    accessed = False
+
+    def __init__(self, initial=None):
+        def on_update(self):
+            self.modified = True
+            self.accessed = True
+
+        super(SecureCookieSession, self).__init__(initial, on_update)
+
+    def __getitem__(self, key):
+        self.accessed = True
+        return super(SecureCookieSession, self).__getitem__(key)
+
+    def get(self, key, default=None):
+        self.accessed = True
+        return super(SecureCookieSession, self).get(key, default)
+
+    def setdefault(self, key, default=None):
+        self.accessed = True
+        return super(SecureCookieSession, self).setdefault(key, default)
+
+
+class NullSession(SecureCookieSession):
+    """Class used to generate nicer error messages if sessions are not
+    available.  Will still allow read-only access to the empty session
+    but fail on setting.
+    """
+
+    def _fail(self, *args, **kwargs):
+        raise RuntimeError(
+            "The session is unavailable because no secret "
+            "key was set.  Set the secret_key on the "
+            "application to something unique and secret."
+        )
+
+    __setitem__ = __delitem__ = clear = pop = popitem = update = setdefault = _fail
+    del _fail
+
+
+class SessionInterface(object):
+    """The basic interface you have to implement in order to replace the
+    default session interface which uses werkzeug's securecookie
+    implementation.  The only methods you have to implement are
+    :meth:`open_session` and :meth:`save_session`, the others have
+    useful defaults which you don't need to change.
+
+    The session object returned by the :meth:`open_session` method has to
+    provide a dictionary like interface plus the properties and methods
+    from the :class:`SessionMixin`.  We recommend just subclassing a dict
+    and adding that mixin::
+
+        class Session(dict, SessionMixin):
+            pass
+
+    If :meth:`open_session` returns ``None`` Flask will call into
+    :meth:`make_null_session` to create a session that acts as replacement
+    if the session support cannot work because some requirement is not
+    fulfilled.  The default :class:`NullSession` class that is created
+    will complain that the secret key was not set.
+
+    To replace the session interface on an application all you have to do
+    is to assign :attr:`flask.Flask.session_interface`::
+
+        app = Flask(__name__)
+        app.session_interface = MySessionInterface()
+
+    .. versionadded:: 0.8
+    """
+
+    #: :meth:`make_null_session` will look here for the class that should
+    #: be created when a null session is requested.  Likewise the
+    #: :meth:`is_null_session` method will perform a typecheck against
+    #: this type.
+    null_session_class = NullSession
+
+    #: A flag that indicates if the session interface is pickle based.
+    #: This can be used by Flask extensions to make a decision in regards
+    #: to how to deal with the session object.
+    #:
+    #: .. versionadded:: 0.10
+    pickle_based = False
+
+    def make_null_session(self, app):
+        """Creates a null session which acts as a replacement object if the
+        real session support could not be loaded due to a configuration
+        error.  This mainly aids the user experience because the job of the
+        null session is to still support lookup without complaining but
+        modifications are answered with a helpful error message of what
+        failed.
+
+        This creates an instance of :attr:`null_session_class` by default.
+        """
+        return self.null_session_class()
+
+    def is_null_session(self, obj):
+        """Checks if a given object is a null session.  Null sessions are
+        not asked to be saved.
+
+        This checks if the object is an instance of :attr:`null_session_class`
+        by default.
+        """
+        return isinstance(obj, self.null_session_class)
+
+    def get_cookie_domain(self, app):
+        """Returns the domain that should be set for the session cookie.
+
+        Uses ``SESSION_COOKIE_DOMAIN`` if it is configured, otherwise
+        falls back to detecting the domain based on ``SERVER_NAME``.
+
+        Once detected (or if not set at all), ``SESSION_COOKIE_DOMAIN`` is
+        updated to avoid re-running the logic.
+        """
+
+        rv = app.config["SESSION_COOKIE_DOMAIN"]
+
+        # set explicitly, or cached from SERVER_NAME detection
+        # if False, return None
+        if rv is not None:
+            return rv if rv else None
+
+        rv = app.config["SERVER_NAME"]
+
+        # server name not set, cache False to return none next time
+        if not rv:
+            app.config["SESSION_COOKIE_DOMAIN"] = False
+            return None
+
+        # chop off the port which is usually not supported by browsers
+        # remove any leading '.' since we'll add that later
+        rv = rv.rsplit(":", 1)[0].lstrip(".")
+
+        if "." not in rv:
+            # Chrome doesn't allow names without a '.'
+            # this should only come up with localhost
+            # hack around this by not setting the name, and show a warning
+            warnings.warn(
+                '"{rv}" is not a valid cookie domain, it must contain a ".".'
+                " Add an entry to your hosts file, for example"
+                ' "{rv}.localdomain", and use that instead.'.format(rv=rv)
+            )
+            app.config["SESSION_COOKIE_DOMAIN"] = False
+            return None
+
+        ip = is_ip(rv)
+
+        if ip:
+            warnings.warn(
+                "The session cookie domain is an IP address. This may not work"
+                " as intended in some browsers. Add an entry to your hosts"
+                ' file, for example "localhost.localdomain", and use that'
+                " instead."
+            )
+
+        # if this is not an ip and app is mounted at the root, allow subdomain
+        # matching by adding a '.' prefix
+        if self.get_cookie_path(app) == "/" and not ip:
+            rv = "." + rv
+
+        app.config["SESSION_COOKIE_DOMAIN"] = rv
+        return rv
+
+    def get_cookie_path(self, app):
+        """Returns the path for which the cookie should be valid.  The
+        default implementation uses the value from the ``SESSION_COOKIE_PATH``
+        config var if it's set, and falls back to ``APPLICATION_ROOT`` or
+        uses ``/`` if it's ``None``.
+        """
+        return app.config["SESSION_COOKIE_PATH"] or app.config["APPLICATION_ROOT"]
+
+    def get_cookie_httponly(self, app):
+        """Returns True if the session cookie should be httponly.  This
+        currently just returns the value of the ``SESSION_COOKIE_HTTPONLY``
+        config var.
+        """
+        return app.config["SESSION_COOKIE_HTTPONLY"]
+
+    def get_cookie_secure(self, app):
+        """Returns True if the cookie should be secure.  This currently
+        just returns the value of the ``SESSION_COOKIE_SECURE`` setting.
+        """
+        return app.config["SESSION_COOKIE_SECURE"]
+
+    def get_cookie_samesite(self, app):
+        """Return ``'Strict'`` or ``'Lax'`` if the cookie should use the
+        ``SameSite`` attribute. This currently just returns the value of
+        the :data:`SESSION_COOKIE_SAMESITE` setting.
+        """
+        return app.config["SESSION_COOKIE_SAMESITE"]
+
+    def get_expiration_time(self, app, session):
+        """A helper method that returns an expiration date for the session
+        or ``None`` if the session is linked to the browser session.  The
+        default implementation returns now + the permanent session
+        lifetime configured on the application.
+        """
+        if session.permanent:
+            return datetime.utcnow() + app.permanent_session_lifetime
+
+    def should_set_cookie(self, app, session):
+        """Used by session backends to determine if a ``Set-Cookie`` header
+        should be set for this session cookie for this response. If the session
+        has been modified, the cookie is set. If the session is permanent and
+        the ``SESSION_REFRESH_EACH_REQUEST`` config is true, the cookie is
+        always set.
+
+        This check is usually skipped if the session was deleted.
+
+        .. versionadded:: 0.11
+        """
+
+        return session.modified or (
+            session.permanent and app.config["SESSION_REFRESH_EACH_REQUEST"]
+        )
+
+    def open_session(self, app, request):
+        """This method has to be implemented and must either return ``None``
+        in case the loading failed because of a configuration error or an
+        instance of a session object which implements a dictionary like
+        interface + the methods and attributes on :class:`SessionMixin`.
+        """
+        raise NotImplementedError()
+
+    def save_session(self, app, session, response):
+        """This is called for actual sessions returned by :meth:`open_session`
+        at the end of the request.  This is still called during a request
+        context so if you absolutely need access to the request you can do
+        that.
+        """
+        raise NotImplementedError()
+
+
+session_json_serializer = TaggedJSONSerializer()
+
+
+class SecureCookieSessionInterface(SessionInterface):
+    """The default session interface that stores sessions in signed cookies
+    through the :mod:`itsdangerous` module.
+    """
+
+    #: the salt that should be applied on top of the secret key for the
+    #: signing of cookie based sessions.
+    salt = "cookie-session"
+    #: the hash function to use for the signature.  The default is sha1
+    digest_method = staticmethod(hashlib.sha1)
+    #: the name of the itsdangerous supported key derivation.  The default
+    #: is hmac.
+    key_derivation = "hmac"
+    #: A python serializer for the payload.  The default is a compact
+    #: JSON derived serializer with support for some extra Python types
+    #: such as datetime objects or tuples.
+    serializer = session_json_serializer
+    session_class = SecureCookieSession
+
+    def get_signing_serializer(self, app):
+        if not app.secret_key:
+            return None
+        signer_kwargs = dict(
+            key_derivation=self.key_derivation, digest_method=self.digest_method
+        )
+        return URLSafeTimedSerializer(
+            app.secret_key,
+            salt=self.salt,
+            serializer=self.serializer,
+            signer_kwargs=signer_kwargs,
+        )
+
+    def open_session(self, app, request):
+        s = self.get_signing_serializer(app)
+        if s is None:
+            return None
+        val = request.cookies.get(app.session_cookie_name)
+        if not val:
+            return self.session_class()
+        max_age = total_seconds(app.permanent_session_lifetime)
+        try:
+            data = s.loads(val, max_age=max_age)
+            return self.session_class(data)
+        except BadSignature:
+            return self.session_class()
+
+    def save_session(self, app, session, response):
+        domain = self.get_cookie_domain(app)
+        path = self.get_cookie_path(app)
+
+        # If the session is modified to be empty, remove the cookie.
+        # If the session is empty, return without setting the cookie.
+        if not session:
+            if session.modified:
+                response.delete_cookie(
+                    app.session_cookie_name, domain=domain, path=path
+                )
+
+            return
+
+        # Add a "Vary: Cookie" header if the session was accessed at all.
+        if session.accessed:
+            response.vary.add("Cookie")
+
+        if not self.should_set_cookie(app, session):
+            return
+
+        httponly = self.get_cookie_httponly(app)
+        secure = self.get_cookie_secure(app)
+        samesite = self.get_cookie_samesite(app)
+        expires = self.get_expiration_time(app, session)
+        val = self.get_signing_serializer(app).dumps(dict(session))
+        response.set_cookie(
+            app.session_cookie_name,
+            val,
+            expires=expires,
+            httponly=httponly,
+            domain=domain,
+            path=path,
+            secure=secure,
+            samesite=samesite,
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/signals.py b/python3-vckonline/lib/python3.8/site-packages/flask/signals.py
new file mode 100644
index 0000000..a223977
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/signals.py
@@ -0,0 +1,65 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.signals
+    ~~~~~~~~~~~~~
+
+    Implements signals based on blinker if available, otherwise
+    falls silently back to a noop.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+try:
+    from blinker import Namespace
+
+    signals_available = True
+except ImportError:
+    signals_available = False
+
+    class Namespace(object):
+        def signal(self, name, doc=None):
+            return _FakeSignal(name, doc)
+
+    class _FakeSignal(object):
+        """If blinker is unavailable, create a fake class with the same
+        interface that allows sending of signals but will fail with an
+        error on anything else.  Instead of doing anything on send, it
+        will just ignore the arguments and do nothing instead.
+        """
+
+        def __init__(self, name, doc=None):
+            self.name = name
+            self.__doc__ = doc
+
+        def send(self, *args, **kwargs):
+            pass
+
+        def _fail(self, *args, **kwargs):
+            raise RuntimeError(
+                "Signalling support is unavailable because the blinker"
+                " library is not installed."
+            )
+
+        connect = connect_via = connected_to = temporarily_connected_to = _fail
+        disconnect = _fail
+        has_receivers_for = receivers_for = _fail
+        del _fail
+
+
+# The namespace for code signals.  If you are not Flask code, do
+# not put signals in here.  Create your own namespace instead.
+_signals = Namespace()
+
+
+# Core signals.  For usage examples grep the source code or consult
+# the API documentation in docs/api.rst as well as docs/signals.rst
+template_rendered = _signals.signal("template-rendered")
+before_render_template = _signals.signal("before-render-template")
+request_started = _signals.signal("request-started")
+request_finished = _signals.signal("request-finished")
+request_tearing_down = _signals.signal("request-tearing-down")
+got_request_exception = _signals.signal("got-request-exception")
+appcontext_tearing_down = _signals.signal("appcontext-tearing-down")
+appcontext_pushed = _signals.signal("appcontext-pushed")
+appcontext_popped = _signals.signal("appcontext-popped")
+message_flashed = _signals.signal("message-flashed")
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/templating.py b/python3-vckonline/lib/python3.8/site-packages/flask/templating.py
new file mode 100644
index 0000000..5aeacac
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/templating.py
@@ -0,0 +1,155 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.templating
+    ~~~~~~~~~~~~~~~~
+
+    Implements the bridge to Jinja2.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+from jinja2 import BaseLoader
+from jinja2 import Environment as BaseEnvironment
+from jinja2 import TemplateNotFound
+
+from .globals import _app_ctx_stack
+from .globals import _request_ctx_stack
+from .signals import before_render_template
+from .signals import template_rendered
+
+
+def _default_template_ctx_processor():
+    """Default template context processor.  Injects `request`,
+    `session` and `g`.
+    """
+    reqctx = _request_ctx_stack.top
+    appctx = _app_ctx_stack.top
+    rv = {}
+    if appctx is not None:
+        rv["g"] = appctx.g
+    if reqctx is not None:
+        rv["request"] = reqctx.request
+        rv["session"] = reqctx.session
+    return rv
+
+
+class Environment(BaseEnvironment):
+    """Works like a regular Jinja2 environment but has some additional
+    knowledge of how Flask's blueprint works so that it can prepend the
+    name of the blueprint to referenced templates if necessary.
+    """
+
+    def __init__(self, app, **options):
+        if "loader" not in options:
+            options["loader"] = app.create_global_jinja_loader()
+        BaseEnvironment.__init__(self, **options)
+        self.app = app
+
+
+class DispatchingJinjaLoader(BaseLoader):
+    """A loader that looks for templates in the application and all
+    the blueprint folders.
+    """
+
+    def __init__(self, app):
+        self.app = app
+
+    def get_source(self, environment, template):
+        if self.app.config["EXPLAIN_TEMPLATE_LOADING"]:
+            return self._get_source_explained(environment, template)
+        return self._get_source_fast(environment, template)
+
+    def _get_source_explained(self, environment, template):
+        attempts = []
+        trv = None
+
+        for srcobj, loader in self._iter_loaders(template):
+            try:
+                rv = loader.get_source(environment, template)
+                if trv is None:
+                    trv = rv
+            except TemplateNotFound:
+                rv = None
+            attempts.append((loader, srcobj, rv))
+
+        from .debughelpers import explain_template_loading_attempts
+
+        explain_template_loading_attempts(self.app, template, attempts)
+
+        if trv is not None:
+            return trv
+        raise TemplateNotFound(template)
+
+    def _get_source_fast(self, environment, template):
+        for _srcobj, loader in self._iter_loaders(template):
+            try:
+                return loader.get_source(environment, template)
+            except TemplateNotFound:
+                continue
+        raise TemplateNotFound(template)
+
+    def _iter_loaders(self, template):
+        loader = self.app.jinja_loader
+        if loader is not None:
+            yield self.app, loader
+
+        for blueprint in self.app.iter_blueprints():
+            loader = blueprint.jinja_loader
+            if loader is not None:
+                yield blueprint, loader
+
+    def list_templates(self):
+        result = set()
+        loader = self.app.jinja_loader
+        if loader is not None:
+            result.update(loader.list_templates())
+
+        for blueprint in self.app.iter_blueprints():
+            loader = blueprint.jinja_loader
+            if loader is not None:
+                for template in loader.list_templates():
+                    result.add(template)
+
+        return list(result)
+
+
+def _render(template, context, app):
+    """Renders the template and fires the signal"""
+
+    before_render_template.send(app, template=template, context=context)
+    rv = template.render(context)
+    template_rendered.send(app, template=template, context=context)
+    return rv
+
+
+def render_template(template_name_or_list, **context):
+    """Renders a template from the template folder with the given
+    context.
+
+    :param template_name_or_list: the name of the template to be
+                                  rendered, or an iterable with template names
+                                  the first one existing will be rendered
+    :param context: the variables that should be available in the
+                    context of the template.
+    """
+    ctx = _app_ctx_stack.top
+    ctx.app.update_template_context(context)
+    return _render(
+        ctx.app.jinja_env.get_or_select_template(template_name_or_list),
+        context,
+        ctx.app,
+    )
+
+
+def render_template_string(source, **context):
+    """Renders a template from the given template source string
+    with the given context. Template variables will be autoescaped.
+
+    :param source: the source code of the template to be
+                   rendered
+    :param context: the variables that should be available in the
+                    context of the template.
+    """
+    ctx = _app_ctx_stack.top
+    ctx.app.update_template_context(context)
+    return _render(ctx.app.jinja_env.from_string(source), context, ctx.app)
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/testing.py b/python3-vckonline/lib/python3.8/site-packages/flask/testing.py
new file mode 100644
index 0000000..62766a5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/testing.py
@@ -0,0 +1,283 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.testing
+    ~~~~~~~~~~~~~
+
+    Implements test support helpers.  This module is lazily imported
+    and usually not used in production environments.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+import warnings
+from contextlib import contextmanager
+
+import werkzeug.test
+from click.testing import CliRunner
+from werkzeug.test import Client
+from werkzeug.urls import url_parse
+
+from . import _request_ctx_stack
+from .cli import ScriptInfo
+from .json import dumps as json_dumps
+
+
+class EnvironBuilder(werkzeug.test.EnvironBuilder):
+    """An :class:`~werkzeug.test.EnvironBuilder`, that takes defaults from the
+    application.
+
+    :param app: The Flask application to configure the environment from.
+    :param path: URL path being requested.
+    :param base_url: Base URL where the app is being served, which
+        ``path`` is relative to. If not given, built from
+        :data:`PREFERRED_URL_SCHEME`, ``subdomain``,
+        :data:`SERVER_NAME`, and :data:`APPLICATION_ROOT`.
+    :param subdomain: Subdomain name to append to :data:`SERVER_NAME`.
+    :param url_scheme: Scheme to use instead of
+        :data:`PREFERRED_URL_SCHEME`.
+    :param json: If given, this is serialized as JSON and passed as
+        ``data``. Also defaults ``content_type`` to
+        ``application/json``.
+    :param args: other positional arguments passed to
+        :class:`~werkzeug.test.EnvironBuilder`.
+    :param kwargs: other keyword arguments passed to
+        :class:`~werkzeug.test.EnvironBuilder`.
+    """
+
+    def __init__(
+        self,
+        app,
+        path="/",
+        base_url=None,
+        subdomain=None,
+        url_scheme=None,
+        *args,
+        **kwargs
+    ):
+        assert not (base_url or subdomain or url_scheme) or (
+            base_url is not None
+        ) != bool(
+            subdomain or url_scheme
+        ), 'Cannot pass "subdomain" or "url_scheme" with "base_url".'
+
+        if base_url is None:
+            http_host = app.config.get("SERVER_NAME") or "localhost"
+            app_root = app.config["APPLICATION_ROOT"]
+
+            if subdomain:
+                http_host = "{0}.{1}".format(subdomain, http_host)
+
+            if url_scheme is None:
+                url_scheme = app.config["PREFERRED_URL_SCHEME"]
+
+            url = url_parse(path)
+            base_url = "{scheme}://{netloc}/{path}".format(
+                scheme=url.scheme or url_scheme,
+                netloc=url.netloc or http_host,
+                path=app_root.lstrip("/"),
+            )
+            path = url.path
+
+            if url.query:
+                sep = b"?" if isinstance(url.query, bytes) else "?"
+                path += sep + url.query
+
+        self.app = app
+        super(EnvironBuilder, self).__init__(path, base_url, *args, **kwargs)
+
+    def json_dumps(self, obj, **kwargs):
+        """Serialize ``obj`` to a JSON-formatted string.
+
+        The serialization will be configured according to the config associated
+        with this EnvironBuilder's ``app``.
+        """
+        kwargs.setdefault("app", self.app)
+        return json_dumps(obj, **kwargs)
+
+
+def make_test_environ_builder(*args, **kwargs):
+    """Create a :class:`flask.testing.EnvironBuilder`.
+
+    .. deprecated: 1.1
+        Will be removed in 2.0. Construct
+        ``flask.testing.EnvironBuilder`` directly instead.
+    """
+    warnings.warn(
+        DeprecationWarning(
+            '"make_test_environ_builder()" is deprecated and will be'
+            ' removed in 2.0. Construct "flask.testing.EnvironBuilder"'
+            " directly instead."
+        )
+    )
+    return EnvironBuilder(*args, **kwargs)
+
+
+class FlaskClient(Client):
+    """Works like a regular Werkzeug test client but has some knowledge about
+    how Flask works to defer the cleanup of the request context stack to the
+    end of a ``with`` body when used in a ``with`` statement.  For general
+    information about how to use this class refer to
+    :class:`werkzeug.test.Client`.
+
+    .. versionchanged:: 0.12
+       `app.test_client()` includes preset default environment, which can be
+       set after instantiation of the `app.test_client()` object in
+       `client.environ_base`.
+
+    Basic usage is outlined in the :ref:`testing` chapter.
+    """
+
+    preserve_context = False
+
+    def __init__(self, *args, **kwargs):
+        super(FlaskClient, self).__init__(*args, **kwargs)
+        self.environ_base = {
+            "REMOTE_ADDR": "127.0.0.1",
+            "HTTP_USER_AGENT": "werkzeug/" + werkzeug.__version__,
+        }
+
+    @contextmanager
+    def session_transaction(self, *args, **kwargs):
+        """When used in combination with a ``with`` statement this opens a
+        session transaction.  This can be used to modify the session that
+        the test client uses.  Once the ``with`` block is left the session is
+        stored back.
+
+        ::
+
+            with client.session_transaction() as session:
+                session['value'] = 42
+
+        Internally this is implemented by going through a temporary test
+        request context and since session handling could depend on
+        request variables this function accepts the same arguments as
+        :meth:`~flask.Flask.test_request_context` which are directly
+        passed through.
+        """
+        if self.cookie_jar is None:
+            raise RuntimeError(
+                "Session transactions only make sense with cookies enabled."
+            )
+        app = self.application
+        environ_overrides = kwargs.setdefault("environ_overrides", {})
+        self.cookie_jar.inject_wsgi(environ_overrides)
+        outer_reqctx = _request_ctx_stack.top
+        with app.test_request_context(*args, **kwargs) as c:
+            session_interface = app.session_interface
+            sess = session_interface.open_session(app, c.request)
+            if sess is None:
+                raise RuntimeError(
+                    "Session backend did not open a session. Check the configuration"
+                )
+
+            # Since we have to open a new request context for the session
+            # handling we want to make sure that we hide out own context
+            # from the caller.  By pushing the original request context
+            # (or None) on top of this and popping it we get exactly that
+            # behavior.  It's important to not use the push and pop
+            # methods of the actual request context object since that would
+            # mean that cleanup handlers are called
+            _request_ctx_stack.push(outer_reqctx)
+            try:
+                yield sess
+            finally:
+                _request_ctx_stack.pop()
+
+            resp = app.response_class()
+            if not session_interface.is_null_session(sess):
+                session_interface.save_session(app, sess, resp)
+            headers = resp.get_wsgi_headers(c.request.environ)
+            self.cookie_jar.extract_wsgi(c.request.environ, headers)
+
+    def open(self, *args, **kwargs):
+        as_tuple = kwargs.pop("as_tuple", False)
+        buffered = kwargs.pop("buffered", False)
+        follow_redirects = kwargs.pop("follow_redirects", False)
+
+        if (
+            not kwargs
+            and len(args) == 1
+            and isinstance(args[0], (werkzeug.test.EnvironBuilder, dict))
+        ):
+            environ = self.environ_base.copy()
+
+            if isinstance(args[0], werkzeug.test.EnvironBuilder):
+                environ.update(args[0].get_environ())
+            else:
+                environ.update(args[0])
+
+            environ["flask._preserve_context"] = self.preserve_context
+        else:
+            kwargs.setdefault("environ_overrides", {})[
+                "flask._preserve_context"
+            ] = self.preserve_context
+            kwargs.setdefault("environ_base", self.environ_base)
+            builder = EnvironBuilder(self.application, *args, **kwargs)
+
+            try:
+                environ = builder.get_environ()
+            finally:
+                builder.close()
+
+        return Client.open(
+            self,
+            environ,
+            as_tuple=as_tuple,
+            buffered=buffered,
+            follow_redirects=follow_redirects,
+        )
+
+    def __enter__(self):
+        if self.preserve_context:
+            raise RuntimeError("Cannot nest client invocations")
+        self.preserve_context = True
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.preserve_context = False
+
+        # Normally the request context is preserved until the next
+        # request in the same thread comes. When the client exits we
+        # want to clean up earlier. Pop request contexts until the stack
+        # is empty or a non-preserved one is found.
+        while True:
+            top = _request_ctx_stack.top
+
+            if top is not None and top.preserved:
+                top.pop()
+            else:
+                break
+
+
+class FlaskCliRunner(CliRunner):
+    """A :class:`~click.testing.CliRunner` for testing a Flask app's
+    CLI commands. Typically created using
+    :meth:`~flask.Flask.test_cli_runner`. See :ref:`testing-cli`.
+    """
+
+    def __init__(self, app, **kwargs):
+        self.app = app
+        super(FlaskCliRunner, self).__init__(**kwargs)
+
+    def invoke(self, cli=None, args=None, **kwargs):
+        """Invokes a CLI command in an isolated environment. See
+        :meth:`CliRunner.invoke <click.testing.CliRunner.invoke>` for
+        full method documentation. See :ref:`testing-cli` for examples.
+
+        If the ``obj`` argument is not given, passes an instance of
+        :class:`~flask.cli.ScriptInfo` that knows how to load the Flask
+        app being tested.
+
+        :param cli: Command object to invoke. Default is the app's
+            :attr:`~flask.app.Flask.cli` group.
+        :param args: List of strings to invoke the command with.
+
+        :return: a :class:`~click.testing.Result` object.
+        """
+        if cli is None:
+            cli = self.app.cli
+
+        if "obj" not in kwargs:
+            kwargs["obj"] = ScriptInfo(create_app=lambda: self.app)
+
+        return super(FlaskCliRunner, self).invoke(cli, args, **kwargs)
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/views.py b/python3-vckonline/lib/python3.8/site-packages/flask/views.py
new file mode 100644
index 0000000..b3f9076
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/views.py
@@ -0,0 +1,163 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.views
+    ~~~~~~~~~~~
+
+    This module provides class-based views inspired by the ones in Django.
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+from ._compat import with_metaclass
+from .globals import request
+
+
+http_method_funcs = frozenset(
+    ["get", "post", "head", "options", "delete", "put", "trace", "patch"]
+)
+
+
+class View(object):
+    """Alternative way to use view functions.  A subclass has to implement
+    :meth:`dispatch_request` which is called with the view arguments from
+    the URL routing system.  If :attr:`methods` is provided the methods
+    do not have to be passed to the :meth:`~flask.Flask.add_url_rule`
+    method explicitly::
+
+        class MyView(View):
+            methods = ['GET']
+
+            def dispatch_request(self, name):
+                return 'Hello %s!' % name
+
+        app.add_url_rule('/hello/<name>', view_func=MyView.as_view('myview'))
+
+    When you want to decorate a pluggable view you will have to either do that
+    when the view function is created (by wrapping the return value of
+    :meth:`as_view`) or you can use the :attr:`decorators` attribute::
+
+        class SecretView(View):
+            methods = ['GET']
+            decorators = [superuser_required]
+
+            def dispatch_request(self):
+                ...
+
+    The decorators stored in the decorators list are applied one after another
+    when the view function is created.  Note that you can *not* use the class
+    based decorators since those would decorate the view class and not the
+    generated view function!
+    """
+
+    #: A list of methods this view can handle.
+    methods = None
+
+    #: Setting this disables or force-enables the automatic options handling.
+    provide_automatic_options = None
+
+    #: The canonical way to decorate class-based views is to decorate the
+    #: return value of as_view().  However since this moves parts of the
+    #: logic from the class declaration to the place where it's hooked
+    #: into the routing system.
+    #:
+    #: You can place one or more decorators in this list and whenever the
+    #: view function is created the result is automatically decorated.
+    #:
+    #: .. versionadded:: 0.8
+    decorators = ()
+
+    def dispatch_request(self):
+        """Subclasses have to override this method to implement the
+        actual view function code.  This method is called with all
+        the arguments from the URL rule.
+        """
+        raise NotImplementedError()
+
+    @classmethod
+    def as_view(cls, name, *class_args, **class_kwargs):
+        """Converts the class into an actual view function that can be used
+        with the routing system.  Internally this generates a function on the
+        fly which will instantiate the :class:`View` on each request and call
+        the :meth:`dispatch_request` method on it.
+
+        The arguments passed to :meth:`as_view` are forwarded to the
+        constructor of the class.
+        """
+
+        def view(*args, **kwargs):
+            self = view.view_class(*class_args, **class_kwargs)
+            return self.dispatch_request(*args, **kwargs)
+
+        if cls.decorators:
+            view.__name__ = name
+            view.__module__ = cls.__module__
+            for decorator in cls.decorators:
+                view = decorator(view)
+
+        # We attach the view class to the view function for two reasons:
+        # first of all it allows us to easily figure out what class-based
+        # view this thing came from, secondly it's also used for instantiating
+        # the view class so you can actually replace it with something else
+        # for testing purposes and debugging.
+        view.view_class = cls
+        view.__name__ = name
+        view.__doc__ = cls.__doc__
+        view.__module__ = cls.__module__
+        view.methods = cls.methods
+        view.provide_automatic_options = cls.provide_automatic_options
+        return view
+
+
+class MethodViewType(type):
+    """Metaclass for :class:`MethodView` that determines what methods the view
+    defines.
+    """
+
+    def __init__(cls, name, bases, d):
+        super(MethodViewType, cls).__init__(name, bases, d)
+
+        if "methods" not in d:
+            methods = set()
+
+            for base in bases:
+                if getattr(base, "methods", None):
+                    methods.update(base.methods)
+
+            for key in http_method_funcs:
+                if hasattr(cls, key):
+                    methods.add(key.upper())
+
+            # If we have no method at all in there we don't want to add a
+            # method list. This is for instance the case for the base class
+            # or another subclass of a base method view that does not introduce
+            # new methods.
+            if methods:
+                cls.methods = methods
+
+
+class MethodView(with_metaclass(MethodViewType, View)):
+    """A class-based view that dispatches request methods to the corresponding
+    class methods. For example, if you implement a ``get`` method, it will be
+    used to handle ``GET`` requests. ::
+
+        class CounterAPI(MethodView):
+            def get(self):
+                return session.get('counter', 0)
+
+            def post(self):
+                session['counter'] = session.get('counter', 0) + 1
+                return 'OK'
+
+        app.add_url_rule('/counter', view_func=CounterAPI.as_view('counter'))
+    """
+
+    def dispatch_request(self, *args, **kwargs):
+        meth = getattr(self, request.method.lower(), None)
+
+        # If the request method is HEAD and we don't have a handler for it
+        # retry with GET.
+        if meth is None and request.method == "HEAD":
+            meth = getattr(self, "get", None)
+
+        assert meth is not None, "Unimplemented method %r" % request.method
+        return meth(*args, **kwargs)
diff --git a/python3-vckonline/lib/python3.8/site-packages/flask/wrappers.py b/python3-vckonline/lib/python3.8/site-packages/flask/wrappers.py
new file mode 100644
index 0000000..ac16449
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/flask/wrappers.py
@@ -0,0 +1,137 @@
+# -*- coding: utf-8 -*-
+"""
+    flask.wrappers
+    ~~~~~~~~~~~~~~
+
+    Implements the WSGI wrappers (request and response).
+
+    :copyright: 2010 Pallets
+    :license: BSD-3-Clause
+"""
+from werkzeug.exceptions import BadRequest
+from werkzeug.wrappers import Request as RequestBase
+from werkzeug.wrappers import Response as ResponseBase
+from werkzeug.wrappers.json import JSONMixin as _JSONMixin
+
+from . import json
+from .globals import current_app
+
+
+class JSONMixin(_JSONMixin):
+    json_module = json
+
+    def on_json_loading_failed(self, e):
+        if current_app and current_app.debug:
+            raise BadRequest("Failed to decode JSON object: {0}".format(e))
+
+        raise BadRequest()
+
+
+class Request(RequestBase, JSONMixin):
+    """The request object used by default in Flask.  Remembers the
+    matched endpoint and view arguments.
+
+    It is what ends up as :class:`~flask.request`.  If you want to replace
+    the request object used you can subclass this and set
+    :attr:`~flask.Flask.request_class` to your subclass.
+
+    The request object is a :class:`~werkzeug.wrappers.Request` subclass and
+    provides all of the attributes Werkzeug defines plus a few Flask
+    specific ones.
+    """
+
+    #: The internal URL rule that matched the request.  This can be
+    #: useful to inspect which methods are allowed for the URL from
+    #: a before/after handler (``request.url_rule.methods``) etc.
+    #: Though if the request's method was invalid for the URL rule,
+    #: the valid list is available in ``routing_exception.valid_methods``
+    #: instead (an attribute of the Werkzeug exception
+    #: :exc:`~werkzeug.exceptions.MethodNotAllowed`)
+    #: because the request was never internally bound.
+    #:
+    #: .. versionadded:: 0.6
+    url_rule = None
+
+    #: A dict of view arguments that matched the request.  If an exception
+    #: happened when matching, this will be ``None``.
+    view_args = None
+
+    #: If matching the URL failed, this is the exception that will be
+    #: raised / was raised as part of the request handling.  This is
+    #: usually a :exc:`~werkzeug.exceptions.NotFound` exception or
+    #: something similar.
+    routing_exception = None
+
+    @property
+    def max_content_length(self):
+        """Read-only view of the ``MAX_CONTENT_LENGTH`` config key."""
+        if current_app:
+            return current_app.config["MAX_CONTENT_LENGTH"]
+
+    @property
+    def endpoint(self):
+        """The endpoint that matched the request.  This in combination with
+        :attr:`view_args` can be used to reconstruct the same or a
+        modified URL.  If an exception happened when matching, this will
+        be ``None``.
+        """
+        if self.url_rule is not None:
+            return self.url_rule.endpoint
+
+    @property
+    def blueprint(self):
+        """The name of the current blueprint"""
+        if self.url_rule and "." in self.url_rule.endpoint:
+            return self.url_rule.endpoint.rsplit(".", 1)[0]
+
+    def _load_form_data(self):
+        RequestBase._load_form_data(self)
+
+        # In debug mode we're replacing the files multidict with an ad-hoc
+        # subclass that raises a different error for key errors.
+        if (
+            current_app
+            and current_app.debug
+            and self.mimetype != "multipart/form-data"
+            and not self.files
+        ):
+            from .debughelpers import attach_enctype_error_multidict
+
+            attach_enctype_error_multidict(self)
+
+
+class Response(ResponseBase, JSONMixin):
+    """The response object that is used by default in Flask.  Works like the
+    response object from Werkzeug but is set to have an HTML mimetype by
+    default.  Quite often you don't have to create this object yourself because
+    :meth:`~flask.Flask.make_response` will take care of that for you.
+
+    If you want to replace the response object used you can subclass this and
+    set :attr:`~flask.Flask.response_class` to your subclass.
+
+    .. versionchanged:: 1.0
+        JSON support is added to the response, like the request. This is useful
+        when testing to get the test client response data as JSON.
+
+    .. versionchanged:: 1.0
+
+        Added :attr:`max_cookie_size`.
+    """
+
+    default_mimetype = "text/html"
+
+    def _get_data_for_json(self, cache):
+        return self.get_data()
+
+    @property
+    def max_cookie_size(self):
+        """Read-only view of the :data:`MAX_COOKIE_SIZE` config key.
+
+        See :attr:`~werkzeug.wrappers.BaseResponse.max_cookie_size` in
+        Werkzeug's docs.
+        """
+        if current_app:
+            return current_app.config["MAX_COOKIE_SIZE"]
+
+        # return Werkzeug's default when not in an app context
+        return super(Response, self).max_cookie_size
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/__init__.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/__init__.py
new file mode 100644
index 0000000..4e0d0e3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/__init__.py
@@ -0,0 +1,39 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Copyright 2007 Google Inc. All Rights Reserved.
+
+__version__ = '3.13.0'
+
+if __name__ != '__main__':
+  try:
+    __import__('pkg_resources').declare_namespace(__name__)
+  except ImportError:
+    __path__ = __import__('pkgutil').extend_path(__path__, __name__)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/any_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/any_pb2.py
new file mode 100644
index 0000000..ed8d7c3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/any_pb2.py
@@ -0,0 +1,78 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/any.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/any.proto',
+  package='google.protobuf',
+  syntax='proto3',
+  serialized_options=b'\n\023com.google.protobufB\010AnyProtoP\001Z%github.com/golang/protobuf/ptypes/any\242\002\003GPB\252\002\036Google.Protobuf.WellKnownTypes',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\x19google/protobuf/any.proto\x12\x0fgoogle.protobuf\"&\n\x03\x41ny\x12\x10\n\x08type_url\x18\x01 \x01(\t\x12\r\n\x05value\x18\x02 \x01(\x0c\x42o\n\x13\x63om.google.protobufB\x08\x41nyProtoP\x01Z%github.com/golang/protobuf/ptypes/any\xa2\x02\x03GPB\xaa\x02\x1eGoogle.Protobuf.WellKnownTypesb\x06proto3'
+)
+
+
+
+
+_ANY = _descriptor.Descriptor(
+  name='Any',
+  full_name='google.protobuf.Any',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type_url', full_name='google.protobuf.Any.type_url', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.Any.value', index=1,
+      number=2, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=46,
+  serialized_end=84,
+)
+
+DESCRIPTOR.message_types_by_name['Any'] = _ANY
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Any = _reflection.GeneratedProtocolMessageType('Any', (_message.Message,), {
+  'DESCRIPTOR' : _ANY,
+  '__module__' : 'google.protobuf.any_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Any)
+  })
+_sym_db.RegisterMessage(Any)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/any_test_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/any_test_pb2.py
new file mode 100644
index 0000000..d61a7ac
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/any_test_pb2.py
@@ -0,0 +1,88 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/any_test.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import any_pb2 as google_dot_protobuf_dot_any__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/any_test.proto',
+  package='protobuf_unittest',
+  syntax='proto3',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\x1egoogle/protobuf/any_test.proto\x12\x11protobuf_unittest\x1a\x19google/protobuf/any.proto\"y\n\x07TestAny\x12\x13\n\x0bint32_value\x18\x01 \x01(\x05\x12\'\n\tany_value\x18\x02 \x01(\x0b\x32\x14.google.protobuf.Any\x12\x30\n\x12repeated_any_value\x18\x03 \x03(\x0b\x32\x14.google.protobuf.Anyb\x06proto3'
+  ,
+  dependencies=[google_dot_protobuf_dot_any__pb2.DESCRIPTOR,])
+
+
+
+
+_TESTANY = _descriptor.Descriptor(
+  name='TestAny',
+  full_name='protobuf_unittest.TestAny',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='int32_value', full_name='protobuf_unittest.TestAny.int32_value', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='any_value', full_name='protobuf_unittest.TestAny.any_value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_any_value', full_name='protobuf_unittest.TestAny.repeated_any_value', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=80,
+  serialized_end=201,
+)
+
+_TESTANY.fields_by_name['any_value'].message_type = google_dot_protobuf_dot_any__pb2._ANY
+_TESTANY.fields_by_name['repeated_any_value'].message_type = google_dot_protobuf_dot_any__pb2._ANY
+DESCRIPTOR.message_types_by_name['TestAny'] = _TESTANY
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestAny = _reflection.GeneratedProtocolMessageType('TestAny', (_message.Message,), {
+  'DESCRIPTOR' : _TESTANY,
+  '__module__' : 'google.protobuf.any_test_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestAny)
+  })
+_sym_db.RegisterMessage(TestAny)
+
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/api_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/api_pb2.py
new file mode 100644
index 0000000..1e02c3a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/api_pb2.py
@@ -0,0 +1,252 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/api.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import source_context_pb2 as google_dot_protobuf_dot_source__context__pb2
+from google.protobuf import type_pb2 as google_dot_protobuf_dot_type__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/api.proto',
+  package='google.protobuf',
+  syntax='proto3',
+  serialized_options=b'\n\023com.google.protobufB\010ApiProtoP\001Z+google.golang.org/genproto/protobuf/api;api\242\002\003GPB\252\002\036Google.Protobuf.WellKnownTypes',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\x19google/protobuf/api.proto\x12\x0fgoogle.protobuf\x1a$google/protobuf/source_context.proto\x1a\x1agoogle/protobuf/type.proto\"\x81\x02\n\x03\x41pi\x12\x0c\n\x04name\x18\x01 \x01(\t\x12(\n\x07methods\x18\x02 \x03(\x0b\x32\x17.google.protobuf.Method\x12(\n\x07options\x18\x03 \x03(\x0b\x32\x17.google.protobuf.Option\x12\x0f\n\x07version\x18\x04 \x01(\t\x12\x36\n\x0esource_context\x18\x05 \x01(\x0b\x32\x1e.google.protobuf.SourceContext\x12&\n\x06mixins\x18\x06 \x03(\x0b\x32\x16.google.protobuf.Mixin\x12\'\n\x06syntax\x18\x07 \x01(\x0e\x32\x17.google.protobuf.Syntax\"\xd5\x01\n\x06Method\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x18\n\x10request_type_url\x18\x02 \x01(\t\x12\x19\n\x11request_streaming\x18\x03 \x01(\x08\x12\x19\n\x11response_type_url\x18\x04 \x01(\t\x12\x1a\n\x12response_streaming\x18\x05 \x01(\x08\x12(\n\x07options\x18\x06 \x03(\x0b\x32\x17.google.protobuf.Option\x12\'\n\x06syntax\x18\x07 \x01(\x0e\x32\x17.google.protobuf.Syntax\"#\n\x05Mixin\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x0c\n\x04root\x18\x02 \x01(\tBu\n\x13\x63om.google.protobufB\x08\x41piProtoP\x01Z+google.golang.org/genproto/protobuf/api;api\xa2\x02\x03GPB\xaa\x02\x1eGoogle.Protobuf.WellKnownTypesb\x06proto3'
+  ,
+  dependencies=[google_dot_protobuf_dot_source__context__pb2.DESCRIPTOR,google_dot_protobuf_dot_type__pb2.DESCRIPTOR,])
+
+
+
+
+_API = _descriptor.Descriptor(
+  name='Api',
+  full_name='google.protobuf.Api',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.Api.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='methods', full_name='google.protobuf.Api.methods', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.Api.options', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='version', full_name='google.protobuf.Api.version', index=3,
+      number=4, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='source_context', full_name='google.protobuf.Api.source_context', index=4,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='mixins', full_name='google.protobuf.Api.mixins', index=5,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='syntax', full_name='google.protobuf.Api.syntax', index=6,
+      number=7, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=113,
+  serialized_end=370,
+)
+
+
+_METHOD = _descriptor.Descriptor(
+  name='Method',
+  full_name='google.protobuf.Method',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.Method.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='request_type_url', full_name='google.protobuf.Method.request_type_url', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='request_streaming', full_name='google.protobuf.Method.request_streaming', index=2,
+      number=3, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='response_type_url', full_name='google.protobuf.Method.response_type_url', index=3,
+      number=4, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='response_streaming', full_name='google.protobuf.Method.response_streaming', index=4,
+      number=5, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.Method.options', index=5,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='syntax', full_name='google.protobuf.Method.syntax', index=6,
+      number=7, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=373,
+  serialized_end=586,
+)
+
+
+_MIXIN = _descriptor.Descriptor(
+  name='Mixin',
+  full_name='google.protobuf.Mixin',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.Mixin.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='root', full_name='google.protobuf.Mixin.root', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=588,
+  serialized_end=623,
+)
+
+_API.fields_by_name['methods'].message_type = _METHOD
+_API.fields_by_name['options'].message_type = google_dot_protobuf_dot_type__pb2._OPTION
+_API.fields_by_name['source_context'].message_type = google_dot_protobuf_dot_source__context__pb2._SOURCECONTEXT
+_API.fields_by_name['mixins'].message_type = _MIXIN
+_API.fields_by_name['syntax'].enum_type = google_dot_protobuf_dot_type__pb2._SYNTAX
+_METHOD.fields_by_name['options'].message_type = google_dot_protobuf_dot_type__pb2._OPTION
+_METHOD.fields_by_name['syntax'].enum_type = google_dot_protobuf_dot_type__pb2._SYNTAX
+DESCRIPTOR.message_types_by_name['Api'] = _API
+DESCRIPTOR.message_types_by_name['Method'] = _METHOD
+DESCRIPTOR.message_types_by_name['Mixin'] = _MIXIN
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Api = _reflection.GeneratedProtocolMessageType('Api', (_message.Message,), {
+  'DESCRIPTOR' : _API,
+  '__module__' : 'google.protobuf.api_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Api)
+  })
+_sym_db.RegisterMessage(Api)
+
+Method = _reflection.GeneratedProtocolMessageType('Method', (_message.Message,), {
+  'DESCRIPTOR' : _METHOD,
+  '__module__' : 'google.protobuf.api_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Method)
+  })
+_sym_db.RegisterMessage(Method)
+
+Mixin = _reflection.GeneratedProtocolMessageType('Mixin', (_message.Message,), {
+  'DESCRIPTOR' : _MIXIN,
+  '__module__' : 'google.protobuf.api_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Mixin)
+  })
+_sym_db.RegisterMessage(Mixin)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/__init__.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..214b47a
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/__pycache__/__init__.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/__pycache__/plugin_pb2.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/__pycache__/plugin_pb2.cpython-38.pyc
new file mode 100644
index 0000000..6d7d695
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/__pycache__/plugin_pb2.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/plugin_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/plugin_pb2.py
new file mode 100644
index 0000000..d3d260e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/compiler/plugin_pb2.py
@@ -0,0 +1,293 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/compiler/plugin.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import descriptor_pb2 as google_dot_protobuf_dot_descriptor__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/compiler/plugin.proto',
+  package='google.protobuf.compiler',
+  syntax='proto2',
+  serialized_options=b'\n\034com.google.protobuf.compilerB\014PluginProtosZ9github.com/golang/protobuf/protoc-gen-go/plugin;plugin_go',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n%google/protobuf/compiler/plugin.proto\x12\x18google.protobuf.compiler\x1a google/protobuf/descriptor.proto\"F\n\x07Version\x12\r\n\x05major\x18\x01 \x01(\x05\x12\r\n\x05minor\x18\x02 \x01(\x05\x12\r\n\x05patch\x18\x03 \x01(\x05\x12\x0e\n\x06suffix\x18\x04 \x01(\t\"\xba\x01\n\x14\x43odeGeneratorRequest\x12\x18\n\x10\x66ile_to_generate\x18\x01 \x03(\t\x12\x11\n\tparameter\x18\x02 \x01(\t\x12\x38\n\nproto_file\x18\x0f \x03(\x0b\x32$.google.protobuf.FileDescriptorProto\x12;\n\x10\x63ompiler_version\x18\x03 \x01(\x0b\x32!.google.protobuf.compiler.Version\"\x80\x02\n\x15\x43odeGeneratorResponse\x12\r\n\x05\x65rror\x18\x01 \x01(\t\x12\x1a\n\x12supported_features\x18\x02 \x01(\x04\x12\x42\n\x04\x66ile\x18\x0f \x03(\x0b\x32\x34.google.protobuf.compiler.CodeGeneratorResponse.File\x1a>\n\x04\x46ile\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x17\n\x0finsertion_point\x18\x02 \x01(\t\x12\x0f\n\x07\x63ontent\x18\x0f \x01(\t\"8\n\x07\x46\x65\x61ture\x12\x10\n\x0c\x46\x45\x41TURE_NONE\x10\x00\x12\x1b\n\x17\x46\x45\x41TURE_PROTO3_OPTIONAL\x10\x01\x42g\n\x1c\x63om.google.protobuf.compilerB\x0cPluginProtosZ9github.com/golang/protobuf/protoc-gen-go/plugin;plugin_go'
+  ,
+  dependencies=[google_dot_protobuf_dot_descriptor__pb2.DESCRIPTOR,])
+
+
+
+_CODEGENERATORRESPONSE_FEATURE = _descriptor.EnumDescriptor(
+  name='Feature',
+  full_name='google.protobuf.compiler.CodeGeneratorResponse.Feature',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FEATURE_NONE', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FEATURE_PROTO3_OPTIONAL', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=563,
+  serialized_end=619,
+)
+_sym_db.RegisterEnumDescriptor(_CODEGENERATORRESPONSE_FEATURE)
+
+
+_VERSION = _descriptor.Descriptor(
+  name='Version',
+  full_name='google.protobuf.compiler.Version',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='major', full_name='google.protobuf.compiler.Version.major', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='minor', full_name='google.protobuf.compiler.Version.minor', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='patch', full_name='google.protobuf.compiler.Version.patch', index=2,
+      number=3, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='suffix', full_name='google.protobuf.compiler.Version.suffix', index=3,
+      number=4, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=101,
+  serialized_end=171,
+)
+
+
+_CODEGENERATORREQUEST = _descriptor.Descriptor(
+  name='CodeGeneratorRequest',
+  full_name='google.protobuf.compiler.CodeGeneratorRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='file_to_generate', full_name='google.protobuf.compiler.CodeGeneratorRequest.file_to_generate', index=0,
+      number=1, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='parameter', full_name='google.protobuf.compiler.CodeGeneratorRequest.parameter', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='proto_file', full_name='google.protobuf.compiler.CodeGeneratorRequest.proto_file', index=2,
+      number=15, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='compiler_version', full_name='google.protobuf.compiler.CodeGeneratorRequest.compiler_version', index=3,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=174,
+  serialized_end=360,
+)
+
+
+_CODEGENERATORRESPONSE_FILE = _descriptor.Descriptor(
+  name='File',
+  full_name='google.protobuf.compiler.CodeGeneratorResponse.File',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.compiler.CodeGeneratorResponse.File.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='insertion_point', full_name='google.protobuf.compiler.CodeGeneratorResponse.File.insertion_point', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='content', full_name='google.protobuf.compiler.CodeGeneratorResponse.File.content', index=2,
+      number=15, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=499,
+  serialized_end=561,
+)
+
+_CODEGENERATORRESPONSE = _descriptor.Descriptor(
+  name='CodeGeneratorResponse',
+  full_name='google.protobuf.compiler.CodeGeneratorResponse',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='error', full_name='google.protobuf.compiler.CodeGeneratorResponse.error', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='supported_features', full_name='google.protobuf.compiler.CodeGeneratorResponse.supported_features', index=1,
+      number=2, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='file', full_name='google.protobuf.compiler.CodeGeneratorResponse.file', index=2,
+      number=15, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_CODEGENERATORRESPONSE_FILE, ],
+  enum_types=[
+    _CODEGENERATORRESPONSE_FEATURE,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=363,
+  serialized_end=619,
+)
+
+_CODEGENERATORREQUEST.fields_by_name['proto_file'].message_type = google_dot_protobuf_dot_descriptor__pb2._FILEDESCRIPTORPROTO
+_CODEGENERATORREQUEST.fields_by_name['compiler_version'].message_type = _VERSION
+_CODEGENERATORRESPONSE_FILE.containing_type = _CODEGENERATORRESPONSE
+_CODEGENERATORRESPONSE.fields_by_name['file'].message_type = _CODEGENERATORRESPONSE_FILE
+_CODEGENERATORRESPONSE_FEATURE.containing_type = _CODEGENERATORRESPONSE
+DESCRIPTOR.message_types_by_name['Version'] = _VERSION
+DESCRIPTOR.message_types_by_name['CodeGeneratorRequest'] = _CODEGENERATORREQUEST
+DESCRIPTOR.message_types_by_name['CodeGeneratorResponse'] = _CODEGENERATORRESPONSE
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Version = _reflection.GeneratedProtocolMessageType('Version', (_message.Message,), {
+  'DESCRIPTOR' : _VERSION,
+  '__module__' : 'google.protobuf.compiler.plugin_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.compiler.Version)
+  })
+_sym_db.RegisterMessage(Version)
+
+CodeGeneratorRequest = _reflection.GeneratedProtocolMessageType('CodeGeneratorRequest', (_message.Message,), {
+  'DESCRIPTOR' : _CODEGENERATORREQUEST,
+  '__module__' : 'google.protobuf.compiler.plugin_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.compiler.CodeGeneratorRequest)
+  })
+_sym_db.RegisterMessage(CodeGeneratorRequest)
+
+CodeGeneratorResponse = _reflection.GeneratedProtocolMessageType('CodeGeneratorResponse', (_message.Message,), {
+
+  'File' : _reflection.GeneratedProtocolMessageType('File', (_message.Message,), {
+    'DESCRIPTOR' : _CODEGENERATORRESPONSE_FILE,
+    '__module__' : 'google.protobuf.compiler.plugin_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.compiler.CodeGeneratorResponse.File)
+    })
+  ,
+  'DESCRIPTOR' : _CODEGENERATORRESPONSE,
+  '__module__' : 'google.protobuf.compiler.plugin_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.compiler.CodeGeneratorResponse)
+  })
+_sym_db.RegisterMessage(CodeGeneratorResponse)
+_sym_db.RegisterMessage(CodeGeneratorResponse.File)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor.py
new file mode 100644
index 0000000..5ef81a2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor.py
@@ -0,0 +1,1141 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Descriptors essentially contain exactly the information found in a .proto
+file, in types that make this information accessible in Python.
+"""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+import threading
+import warnings
+import six
+
+from google.protobuf.internal import api_implementation
+
+_USE_C_DESCRIPTORS = False
+if api_implementation.Type() == 'cpp':
+  # Used by MakeDescriptor in cpp mode
+  import binascii
+  import os
+  from google.protobuf.pyext import _message
+  _USE_C_DESCRIPTORS = True
+
+
+class Error(Exception):
+  """Base error for this module."""
+
+
+class TypeTransformationError(Error):
+  """Error transforming between python proto type and corresponding C++ type."""
+
+
+if _USE_C_DESCRIPTORS:
+  # This metaclass allows to override the behavior of code like
+  #     isinstance(my_descriptor, FieldDescriptor)
+  # and make it return True when the descriptor is an instance of the extension
+  # type written in C++.
+  class DescriptorMetaclass(type):
+    def __instancecheck__(cls, obj):
+      if super(DescriptorMetaclass, cls).__instancecheck__(obj):
+        return True
+      if isinstance(obj, cls._C_DESCRIPTOR_CLASS):
+        return True
+      return False
+else:
+  # The standard metaclass; nothing changes.
+  DescriptorMetaclass = type
+
+
+class _Lock(object):
+  """Wrapper class of threading.Lock(), which is allowed by 'with'."""
+
+  def __new__(cls):
+    self = object.__new__(cls)
+    self._lock = threading.Lock()  # pylint: disable=protected-access
+    return self
+
+  def __enter__(self):
+    self._lock.acquire()
+
+  def __exit__(self, exc_type, exc_value, exc_tb):
+    self._lock.release()
+
+
+_lock = threading.Lock()
+
+
+def _Deprecated(name):
+  if _Deprecated.count > 0:
+    _Deprecated.count -= 1
+    warnings.warn(
+        'Call to deprecated create function %s(). Note: Create unlinked '
+        'descriptors is going to go away. Please use get/find descriptors from '
+        'generated code or query the descriptor_pool.'
+        % name,
+        category=DeprecationWarning, stacklevel=3)
+
+
+# Deprecated warnings will print 100 times at most which should be enough for
+# users to notice and do not cause timeout.
+_Deprecated.count = 100
+
+
+_internal_create_key = object()
+
+
+class DescriptorBase(six.with_metaclass(DescriptorMetaclass)):
+
+  """Descriptors base class.
+
+  This class is the base of all descriptor classes. It provides common options
+  related functionality.
+
+  Attributes:
+    has_options:  True if the descriptor has non-default options.  Usually it
+        is not necessary to read this -- just call GetOptions() which will
+        happily return the default instance.  However, it's sometimes useful
+        for efficiency, and also useful inside the protobuf implementation to
+        avoid some bootstrapping issues.
+  """
+
+  if _USE_C_DESCRIPTORS:
+    # The class, or tuple of classes, that are considered as "virtual
+    # subclasses" of this descriptor class.
+    _C_DESCRIPTOR_CLASS = ()
+
+  def __init__(self, options, serialized_options, options_class_name):
+    """Initialize the descriptor given its options message and the name of the
+    class of the options message. The name of the class is required in case
+    the options message is None and has to be created.
+    """
+    self._options = options
+    self._options_class_name = options_class_name
+    self._serialized_options = serialized_options
+
+    # Does this descriptor have non-default options?
+    self.has_options = (options is not None) or (serialized_options is not None)
+
+  def _SetOptions(self, options, options_class_name):
+    """Sets the descriptor's options
+
+    This function is used in generated proto2 files to update descriptor
+    options. It must not be used outside proto2.
+    """
+    self._options = options
+    self._options_class_name = options_class_name
+
+    # Does this descriptor have non-default options?
+    self.has_options = options is not None
+
+  def GetOptions(self):
+    """Retrieves descriptor options.
+
+    This method returns the options set or creates the default options for the
+    descriptor.
+    """
+    if self._options:
+      return self._options
+
+    from google.protobuf import descriptor_pb2
+    try:
+      options_class = getattr(descriptor_pb2,
+                              self._options_class_name)
+    except AttributeError:
+      raise RuntimeError('Unknown options class name %s!' %
+                         (self._options_class_name))
+
+    with _lock:
+      if self._serialized_options is None:
+        self._options = options_class()
+      else:
+        self._options = _ParseOptions(options_class(),
+                                      self._serialized_options)
+
+      return self._options
+
+
+class _NestedDescriptorBase(DescriptorBase):
+  """Common class for descriptors that can be nested."""
+
+  def __init__(self, options, options_class_name, name, full_name,
+               file, containing_type, serialized_start=None,
+               serialized_end=None, serialized_options=None):
+    """Constructor.
+
+    Args:
+      options: Protocol message options or None
+        to use default message options.
+      options_class_name (str): The class name of the above options.
+      name (str): Name of this protocol message type.
+      full_name (str): Fully-qualified name of this protocol message type,
+        which will include protocol "package" name and the name of any
+        enclosing types.
+      file (FileDescriptor): Reference to file info.
+      containing_type: if provided, this is a nested descriptor, with this
+        descriptor as parent, otherwise None.
+      serialized_start: The start index (inclusive) in block in the
+        file.serialized_pb that describes this descriptor.
+      serialized_end: The end index (exclusive) in block in the
+        file.serialized_pb that describes this descriptor.
+      serialized_options: Protocol message serialized options or None.
+    """
+    super(_NestedDescriptorBase, self).__init__(
+        options, serialized_options, options_class_name)
+
+    self.name = name
+    # TODO(falk): Add function to calculate full_name instead of having it in
+    #             memory?
+    self.full_name = full_name
+    self.file = file
+    self.containing_type = containing_type
+
+    self._serialized_start = serialized_start
+    self._serialized_end = serialized_end
+
+  def CopyToProto(self, proto):
+    """Copies this to the matching proto in descriptor_pb2.
+
+    Args:
+      proto: An empty proto instance from descriptor_pb2.
+
+    Raises:
+      Error: If self couldnt be serialized, due to to few constructor arguments.
+    """
+    if (self.file is not None and
+        self._serialized_start is not None and
+        self._serialized_end is not None):
+      proto.ParseFromString(self.file.serialized_pb[
+          self._serialized_start:self._serialized_end])
+    else:
+      raise Error('Descriptor does not contain serialization.')
+
+
+class Descriptor(_NestedDescriptorBase):
+
+  """Descriptor for a protocol message type.
+
+  Attributes:
+      name (str): Name of this protocol message type.
+      full_name (str): Fully-qualified name of this protocol message type,
+          which will include protocol "package" name and the name of any
+          enclosing types.
+      containing_type (Descriptor): Reference to the descriptor of the type
+          containing us, or None if this is top-level.
+      fields (list[FieldDescriptor]): Field descriptors for all fields in
+          this type.
+      fields_by_number (dict(int, FieldDescriptor)): Same
+          :class:`FieldDescriptor` objects as in :attr:`fields`, but indexed
+          by "number" attribute in each FieldDescriptor.
+      fields_by_name (dict(str, FieldDescriptor)): Same
+          :class:`FieldDescriptor` objects as in :attr:`fields`, but indexed by
+          "name" attribute in each :class:`FieldDescriptor`.
+      nested_types (list[Descriptor]): Descriptor references
+          for all protocol message types nested within this one.
+      nested_types_by_name (dict(str, Descriptor)): Same Descriptor
+          objects as in :attr:`nested_types`, but indexed by "name" attribute
+          in each Descriptor.
+      enum_types (list[EnumDescriptor]): :class:`EnumDescriptor` references
+          for all enums contained within this type.
+      enum_types_by_name (dict(str, EnumDescriptor)): Same
+          :class:`EnumDescriptor` objects as in :attr:`enum_types`, but
+          indexed by "name" attribute in each EnumDescriptor.
+      enum_values_by_name (dict(str, EnumValueDescriptor)): Dict mapping
+          from enum value name to :class:`EnumValueDescriptor` for that value.
+      extensions (list[FieldDescriptor]): All extensions defined directly
+          within this message type (NOT within a nested type).
+      extensions_by_name (dict(str, FieldDescriptor)): Same FieldDescriptor
+          objects as :attr:`extensions`, but indexed by "name" attribute of each
+          FieldDescriptor.
+      is_extendable (bool):  Does this type define any extension ranges?
+      oneofs (list[OneofDescriptor]): The list of descriptors for oneof fields
+          in this message.
+      oneofs_by_name (dict(str, OneofDescriptor)): Same objects as in
+          :attr:`oneofs`, but indexed by "name" attribute.
+      file (FileDescriptor): Reference to file descriptor.
+
+  """
+
+  if _USE_C_DESCRIPTORS:
+    _C_DESCRIPTOR_CLASS = _message.Descriptor
+
+    def __new__(cls, name, full_name, filename, containing_type, fields,
+                nested_types, enum_types, extensions, options=None,
+                serialized_options=None,
+                is_extendable=True, extension_ranges=None, oneofs=None,
+                file=None, serialized_start=None, serialized_end=None,  # pylint: disable=redefined-builtin
+                syntax=None, create_key=None):
+      _message.Message._CheckCalledFromGeneratedFile()
+      return _message.default_pool.FindMessageTypeByName(full_name)
+
+  # NOTE(tmarek): The file argument redefining a builtin is nothing we can
+  # fix right now since we don't know how many clients already rely on the
+  # name of the argument.
+  def __init__(self, name, full_name, filename, containing_type, fields,
+               nested_types, enum_types, extensions, options=None,
+               serialized_options=None,
+               is_extendable=True, extension_ranges=None, oneofs=None,
+               file=None, serialized_start=None, serialized_end=None,  # pylint: disable=redefined-builtin
+               syntax=None, create_key=None):
+    """Arguments to __init__() are as described in the description
+    of Descriptor fields above.
+
+    Note that filename is an obsolete argument, that is not used anymore.
+    Please use file.name to access this as an attribute.
+    """
+    if create_key is not _internal_create_key:
+      _Deprecated('Descriptor')
+
+    super(Descriptor, self).__init__(
+        options, 'MessageOptions', name, full_name, file,
+        containing_type, serialized_start=serialized_start,
+        serialized_end=serialized_end, serialized_options=serialized_options)
+
+    # We have fields in addition to fields_by_name and fields_by_number,
+    # so that:
+    #   1. Clients can index fields by "order in which they're listed."
+    #   2. Clients can easily iterate over all fields with the terse
+    #      syntax: for f in descriptor.fields: ...
+    self.fields = fields
+    for field in self.fields:
+      field.containing_type = self
+    self.fields_by_number = dict((f.number, f) for f in fields)
+    self.fields_by_name = dict((f.name, f) for f in fields)
+    self._fields_by_camelcase_name = None
+
+    self.nested_types = nested_types
+    for nested_type in nested_types:
+      nested_type.containing_type = self
+    self.nested_types_by_name = dict((t.name, t) for t in nested_types)
+
+    self.enum_types = enum_types
+    for enum_type in self.enum_types:
+      enum_type.containing_type = self
+    self.enum_types_by_name = dict((t.name, t) for t in enum_types)
+    self.enum_values_by_name = dict(
+        (v.name, v) for t in enum_types for v in t.values)
+
+    self.extensions = extensions
+    for extension in self.extensions:
+      extension.extension_scope = self
+    self.extensions_by_name = dict((f.name, f) for f in extensions)
+    self.is_extendable = is_extendable
+    self.extension_ranges = extension_ranges
+    self.oneofs = oneofs if oneofs is not None else []
+    self.oneofs_by_name = dict((o.name, o) for o in self.oneofs)
+    for oneof in self.oneofs:
+      oneof.containing_type = self
+    self.syntax = syntax or "proto2"
+
+  @property
+  def fields_by_camelcase_name(self):
+    """Same FieldDescriptor objects as in :attr:`fields`, but indexed by
+    :attr:`FieldDescriptor.camelcase_name`.
+    """
+    if self._fields_by_camelcase_name is None:
+      self._fields_by_camelcase_name = dict(
+          (f.camelcase_name, f) for f in self.fields)
+    return self._fields_by_camelcase_name
+
+  def EnumValueName(self, enum, value):
+    """Returns the string name of an enum value.
+
+    This is just a small helper method to simplify a common operation.
+
+    Args:
+      enum: string name of the Enum.
+      value: int, value of the enum.
+
+    Returns:
+      string name of the enum value.
+
+    Raises:
+      KeyError if either the Enum doesn't exist or the value is not a valid
+        value for the enum.
+    """
+    return self.enum_types_by_name[enum].values_by_number[value].name
+
+  def CopyToProto(self, proto):
+    """Copies this to a descriptor_pb2.DescriptorProto.
+
+    Args:
+      proto: An empty descriptor_pb2.DescriptorProto.
+    """
+    # This function is overridden to give a better doc comment.
+    super(Descriptor, self).CopyToProto(proto)
+
+
+# TODO(robinson): We should have aggressive checking here,
+# for example:
+#   * If you specify a repeated field, you should not be allowed
+#     to specify a default value.
+#   * [Other examples here as needed].
+#
+# TODO(robinson): for this and other *Descriptor classes, we
+# might also want to lock things down aggressively (e.g.,
+# prevent clients from setting the attributes).  Having
+# stronger invariants here in general will reduce the number
+# of runtime checks we must do in reflection.py...
+class FieldDescriptor(DescriptorBase):
+
+  """Descriptor for a single field in a .proto file.
+
+  Attributes:
+    name (str): Name of this field, exactly as it appears in .proto.
+    full_name (str): Name of this field, including containing scope.  This is
+      particularly relevant for extensions.
+    index (int): Dense, 0-indexed index giving the order that this
+      field textually appears within its message in the .proto file.
+    number (int): Tag number declared for this field in the .proto file.
+
+    type (int): (One of the TYPE_* constants below) Declared type.
+    cpp_type (int): (One of the CPPTYPE_* constants below) C++ type used to
+      represent this field.
+
+    label (int): (One of the LABEL_* constants below) Tells whether this
+      field is optional, required, or repeated.
+    has_default_value (bool): True if this field has a default value defined,
+      otherwise false.
+    default_value (Varies): Default value of this field.  Only
+      meaningful for non-repeated scalar fields.  Repeated fields
+      should always set this to [], and non-repeated composite
+      fields should always set this to None.
+
+    containing_type (Descriptor): Descriptor of the protocol message
+      type that contains this field.  Set by the Descriptor constructor
+      if we're passed into one.
+      Somewhat confusingly, for extension fields, this is the
+      descriptor of the EXTENDED message, not the descriptor
+      of the message containing this field.  (See is_extension and
+      extension_scope below).
+    message_type (Descriptor): If a composite field, a descriptor
+      of the message type contained in this field.  Otherwise, this is None.
+    enum_type (EnumDescriptor): If this field contains an enum, a
+      descriptor of that enum.  Otherwise, this is None.
+
+    is_extension: True iff this describes an extension field.
+    extension_scope (Descriptor): Only meaningful if is_extension is True.
+      Gives the message that immediately contains this extension field.
+      Will be None iff we're a top-level (file-level) extension field.
+
+    options (descriptor_pb2.FieldOptions): Protocol message field options or
+      None to use default field options.
+
+    containing_oneof (OneofDescriptor): If the field is a member of a oneof
+      union, contains its descriptor. Otherwise, None.
+
+    file (FileDescriptor): Reference to file descriptor.
+  """
+
+  # Must be consistent with C++ FieldDescriptor::Type enum in
+  # descriptor.h.
+  #
+  # TODO(robinson): Find a way to eliminate this repetition.
+  TYPE_DOUBLE         = 1
+  TYPE_FLOAT          = 2
+  TYPE_INT64          = 3
+  TYPE_UINT64         = 4
+  TYPE_INT32          = 5
+  TYPE_FIXED64        = 6
+  TYPE_FIXED32        = 7
+  TYPE_BOOL           = 8
+  TYPE_STRING         = 9
+  TYPE_GROUP          = 10
+  TYPE_MESSAGE        = 11
+  TYPE_BYTES          = 12
+  TYPE_UINT32         = 13
+  TYPE_ENUM           = 14
+  TYPE_SFIXED32       = 15
+  TYPE_SFIXED64       = 16
+  TYPE_SINT32         = 17
+  TYPE_SINT64         = 18
+  MAX_TYPE            = 18
+
+  # Must be consistent with C++ FieldDescriptor::CppType enum in
+  # descriptor.h.
+  #
+  # TODO(robinson): Find a way to eliminate this repetition.
+  CPPTYPE_INT32       = 1
+  CPPTYPE_INT64       = 2
+  CPPTYPE_UINT32      = 3
+  CPPTYPE_UINT64      = 4
+  CPPTYPE_DOUBLE      = 5
+  CPPTYPE_FLOAT       = 6
+  CPPTYPE_BOOL        = 7
+  CPPTYPE_ENUM        = 8
+  CPPTYPE_STRING      = 9
+  CPPTYPE_MESSAGE     = 10
+  MAX_CPPTYPE         = 10
+
+  _PYTHON_TO_CPP_PROTO_TYPE_MAP = {
+      TYPE_DOUBLE: CPPTYPE_DOUBLE,
+      TYPE_FLOAT: CPPTYPE_FLOAT,
+      TYPE_ENUM: CPPTYPE_ENUM,
+      TYPE_INT64: CPPTYPE_INT64,
+      TYPE_SINT64: CPPTYPE_INT64,
+      TYPE_SFIXED64: CPPTYPE_INT64,
+      TYPE_UINT64: CPPTYPE_UINT64,
+      TYPE_FIXED64: CPPTYPE_UINT64,
+      TYPE_INT32: CPPTYPE_INT32,
+      TYPE_SFIXED32: CPPTYPE_INT32,
+      TYPE_SINT32: CPPTYPE_INT32,
+      TYPE_UINT32: CPPTYPE_UINT32,
+      TYPE_FIXED32: CPPTYPE_UINT32,
+      TYPE_BYTES: CPPTYPE_STRING,
+      TYPE_STRING: CPPTYPE_STRING,
+      TYPE_BOOL: CPPTYPE_BOOL,
+      TYPE_MESSAGE: CPPTYPE_MESSAGE,
+      TYPE_GROUP: CPPTYPE_MESSAGE
+      }
+
+  # Must be consistent with C++ FieldDescriptor::Label enum in
+  # descriptor.h.
+  #
+  # TODO(robinson): Find a way to eliminate this repetition.
+  LABEL_OPTIONAL      = 1
+  LABEL_REQUIRED      = 2
+  LABEL_REPEATED      = 3
+  MAX_LABEL           = 3
+
+  # Must be consistent with C++ constants kMaxNumber, kFirstReservedNumber,
+  # and kLastReservedNumber in descriptor.h
+  MAX_FIELD_NUMBER = (1 << 29) - 1
+  FIRST_RESERVED_FIELD_NUMBER = 19000
+  LAST_RESERVED_FIELD_NUMBER = 19999
+
+  if _USE_C_DESCRIPTORS:
+    _C_DESCRIPTOR_CLASS = _message.FieldDescriptor
+
+    def __new__(cls, name, full_name, index, number, type, cpp_type, label,
+                default_value, message_type, enum_type, containing_type,
+                is_extension, extension_scope, options=None,
+                serialized_options=None,
+                has_default_value=True, containing_oneof=None, json_name=None,
+                file=None, create_key=None):  # pylint: disable=redefined-builtin
+      _message.Message._CheckCalledFromGeneratedFile()
+      if is_extension:
+        return _message.default_pool.FindExtensionByName(full_name)
+      else:
+        return _message.default_pool.FindFieldByName(full_name)
+
+  def __init__(self, name, full_name, index, number, type, cpp_type, label,
+               default_value, message_type, enum_type, containing_type,
+               is_extension, extension_scope, options=None,
+               serialized_options=None,
+               has_default_value=True, containing_oneof=None, json_name=None,
+               file=None, create_key=None):  # pylint: disable=redefined-builtin
+    """The arguments are as described in the description of FieldDescriptor
+    attributes above.
+
+    Note that containing_type may be None, and may be set later if necessary
+    (to deal with circular references between message types, for example).
+    Likewise for extension_scope.
+    """
+    if create_key is not _internal_create_key:
+      _Deprecated('FieldDescriptor')
+
+    super(FieldDescriptor, self).__init__(
+        options, serialized_options, 'FieldOptions')
+    self.name = name
+    self.full_name = full_name
+    self.file = file
+    self._camelcase_name = None
+    if json_name is None:
+      self.json_name = _ToJsonName(name)
+    else:
+      self.json_name = json_name
+    self.index = index
+    self.number = number
+    self.type = type
+    self.cpp_type = cpp_type
+    self.label = label
+    self.has_default_value = has_default_value
+    self.default_value = default_value
+    self.containing_type = containing_type
+    self.message_type = message_type
+    self.enum_type = enum_type
+    self.is_extension = is_extension
+    self.extension_scope = extension_scope
+    self.containing_oneof = containing_oneof
+    if api_implementation.Type() == 'cpp':
+      if is_extension:
+        self._cdescriptor = _message.default_pool.FindExtensionByName(full_name)
+      else:
+        self._cdescriptor = _message.default_pool.FindFieldByName(full_name)
+    else:
+      self._cdescriptor = None
+
+  @property
+  def camelcase_name(self):
+    """Camelcase name of this field.
+
+    Returns:
+      str: the name in CamelCase.
+    """
+    if self._camelcase_name is None:
+      self._camelcase_name = _ToCamelCase(self.name)
+    return self._camelcase_name
+
+  @staticmethod
+  def ProtoTypeToCppProtoType(proto_type):
+    """Converts from a Python proto type to a C++ Proto Type.
+
+    The Python ProtocolBuffer classes specify both the 'Python' datatype and the
+    'C++' datatype - and they're not the same. This helper method should
+    translate from one to another.
+
+    Args:
+      proto_type: the Python proto type (descriptor.FieldDescriptor.TYPE_*)
+    Returns:
+      int: descriptor.FieldDescriptor.CPPTYPE_*, the C++ type.
+    Raises:
+      TypeTransformationError: when the Python proto type isn't known.
+    """
+    try:
+      return FieldDescriptor._PYTHON_TO_CPP_PROTO_TYPE_MAP[proto_type]
+    except KeyError:
+      raise TypeTransformationError('Unknown proto_type: %s' % proto_type)
+
+
+class EnumDescriptor(_NestedDescriptorBase):
+
+  """Descriptor for an enum defined in a .proto file.
+
+  Attributes:
+    name (str): Name of the enum type.
+    full_name (str): Full name of the type, including package name
+      and any enclosing type(s).
+
+    values (list[EnumValueDescriptors]): List of the values
+      in this enum.
+    values_by_name (dict(str, EnumValueDescriptor)): Same as :attr:`values`,
+      but indexed by the "name" field of each EnumValueDescriptor.
+    values_by_number (dict(int, EnumValueDescriptor)): Same as :attr:`values`,
+      but indexed by the "number" field of each EnumValueDescriptor.
+    containing_type (Descriptor): Descriptor of the immediate containing
+      type of this enum, or None if this is an enum defined at the
+      top level in a .proto file.  Set by Descriptor's constructor
+      if we're passed into one.
+    file (FileDescriptor): Reference to file descriptor.
+    options (descriptor_pb2.EnumOptions): Enum options message or
+      None to use default enum options.
+  """
+
+  if _USE_C_DESCRIPTORS:
+    _C_DESCRIPTOR_CLASS = _message.EnumDescriptor
+
+    def __new__(cls, name, full_name, filename, values,
+                containing_type=None, options=None,
+                serialized_options=None, file=None,  # pylint: disable=redefined-builtin
+                serialized_start=None, serialized_end=None, create_key=None):
+      _message.Message._CheckCalledFromGeneratedFile()
+      return _message.default_pool.FindEnumTypeByName(full_name)
+
+  def __init__(self, name, full_name, filename, values,
+               containing_type=None, options=None,
+               serialized_options=None, file=None,  # pylint: disable=redefined-builtin
+               serialized_start=None, serialized_end=None, create_key=None):
+    """Arguments are as described in the attribute description above.
+
+    Note that filename is an obsolete argument, that is not used anymore.
+    Please use file.name to access this as an attribute.
+    """
+    if create_key is not _internal_create_key:
+      _Deprecated('EnumDescriptor')
+
+    super(EnumDescriptor, self).__init__(
+        options, 'EnumOptions', name, full_name, file,
+        containing_type, serialized_start=serialized_start,
+        serialized_end=serialized_end, serialized_options=serialized_options)
+
+    self.values = values
+    for value in self.values:
+      value.type = self
+    self.values_by_name = dict((v.name, v) for v in values)
+    # Values are reversed to ensure that the first alias is retained.
+    self.values_by_number = dict((v.number, v) for v in reversed(values))
+
+  def CopyToProto(self, proto):
+    """Copies this to a descriptor_pb2.EnumDescriptorProto.
+
+    Args:
+      proto (descriptor_pb2.EnumDescriptorProto): An empty descriptor proto.
+    """
+    # This function is overridden to give a better doc comment.
+    super(EnumDescriptor, self).CopyToProto(proto)
+
+
+class EnumValueDescriptor(DescriptorBase):
+
+  """Descriptor for a single value within an enum.
+
+  Attributes:
+    name (str): Name of this value.
+    index (int): Dense, 0-indexed index giving the order that this
+      value appears textually within its enum in the .proto file.
+    number (int): Actual number assigned to this enum value.
+    type (EnumDescriptor): :class:`EnumDescriptor` to which this value
+      belongs.  Set by :class:`EnumDescriptor`'s constructor if we're
+      passed into one.
+    options (descriptor_pb2.EnumValueOptions): Enum value options message or
+      None to use default enum value options options.
+  """
+
+  if _USE_C_DESCRIPTORS:
+    _C_DESCRIPTOR_CLASS = _message.EnumValueDescriptor
+
+    def __new__(cls, name, index, number,
+                type=None,  # pylint: disable=redefined-builtin
+                options=None, serialized_options=None, create_key=None):
+      _message.Message._CheckCalledFromGeneratedFile()
+      # There is no way we can build a complete EnumValueDescriptor with the
+      # given parameters (the name of the Enum is not known, for example).
+      # Fortunately generated files just pass it to the EnumDescriptor()
+      # constructor, which will ignore it, so returning None is good enough.
+      return None
+
+  def __init__(self, name, index, number,
+               type=None,  # pylint: disable=redefined-builtin
+               options=None, serialized_options=None, create_key=None):
+    """Arguments are as described in the attribute description above."""
+    if create_key is not _internal_create_key:
+      _Deprecated('EnumValueDescriptor')
+
+    super(EnumValueDescriptor, self).__init__(
+        options, serialized_options, 'EnumValueOptions')
+    self.name = name
+    self.index = index
+    self.number = number
+    self.type = type
+
+
+class OneofDescriptor(DescriptorBase):
+  """Descriptor for a oneof field.
+
+  Attributes:
+    name (str): Name of the oneof field.
+    full_name (str): Full name of the oneof field, including package name.
+    index (int): 0-based index giving the order of the oneof field inside
+      its containing type.
+    containing_type (Descriptor): :class:`Descriptor` of the protocol message
+      type that contains this field.  Set by the :class:`Descriptor` constructor
+      if we're passed into one.
+    fields (list[FieldDescriptor]): The list of field descriptors this
+      oneof can contain.
+  """
+
+  if _USE_C_DESCRIPTORS:
+    _C_DESCRIPTOR_CLASS = _message.OneofDescriptor
+
+    def __new__(
+        cls, name, full_name, index, containing_type, fields, options=None,
+        serialized_options=None, create_key=None):
+      _message.Message._CheckCalledFromGeneratedFile()
+      return _message.default_pool.FindOneofByName(full_name)
+
+  def __init__(
+      self, name, full_name, index, containing_type, fields, options=None,
+      serialized_options=None, create_key=None):
+    """Arguments are as described in the attribute description above."""
+    if create_key is not _internal_create_key:
+      _Deprecated('OneofDescriptor')
+
+    super(OneofDescriptor, self).__init__(
+        options, serialized_options, 'OneofOptions')
+    self.name = name
+    self.full_name = full_name
+    self.index = index
+    self.containing_type = containing_type
+    self.fields = fields
+
+
+class ServiceDescriptor(_NestedDescriptorBase):
+
+  """Descriptor for a service.
+
+  Attributes:
+    name (str): Name of the service.
+    full_name (str): Full name of the service, including package name.
+    index (int): 0-indexed index giving the order that this services
+      definition appears within the .proto file.
+    methods (list[MethodDescriptor]): List of methods provided by this
+      service.
+    methods_by_name (dict(str, MethodDescriptor)): Same
+      :class:`MethodDescriptor` objects as in :attr:`methods_by_name`, but
+      indexed by "name" attribute in each :class:`MethodDescriptor`.
+    options (descriptor_pb2.ServiceOptions): Service options message or
+      None to use default service options.
+    file (FileDescriptor): Reference to file info.
+  """
+
+  if _USE_C_DESCRIPTORS:
+    _C_DESCRIPTOR_CLASS = _message.ServiceDescriptor
+
+    def __new__(cls, name, full_name, index, methods, options=None,
+                serialized_options=None, file=None,  # pylint: disable=redefined-builtin
+                serialized_start=None, serialized_end=None, create_key=None):
+      _message.Message._CheckCalledFromGeneratedFile()  # pylint: disable=protected-access
+      return _message.default_pool.FindServiceByName(full_name)
+
+  def __init__(self, name, full_name, index, methods, options=None,
+               serialized_options=None, file=None,  # pylint: disable=redefined-builtin
+               serialized_start=None, serialized_end=None, create_key=None):
+    if create_key is not _internal_create_key:
+      _Deprecated('ServiceDescriptor')
+
+    super(ServiceDescriptor, self).__init__(
+        options, 'ServiceOptions', name, full_name, file,
+        None, serialized_start=serialized_start,
+        serialized_end=serialized_end, serialized_options=serialized_options)
+    self.index = index
+    self.methods = methods
+    self.methods_by_name = dict((m.name, m) for m in methods)
+    # Set the containing service for each method in this service.
+    for method in self.methods:
+      method.containing_service = self
+
+  def FindMethodByName(self, name):
+    """Searches for the specified method, and returns its descriptor.
+
+    Args:
+      name (str): Name of the method.
+    Returns:
+      MethodDescriptor or None: the desctiptor for the requested method, if
+      found.
+    """
+    return self.methods_by_name.get(name, None)
+
+  def CopyToProto(self, proto):
+    """Copies this to a descriptor_pb2.ServiceDescriptorProto.
+
+    Args:
+      proto (descriptor_pb2.ServiceDescriptorProto): An empty descriptor proto.
+    """
+    # This function is overridden to give a better doc comment.
+    super(ServiceDescriptor, self).CopyToProto(proto)
+
+
+class MethodDescriptor(DescriptorBase):
+
+  """Descriptor for a method in a service.
+
+  Attributes:
+    name (str): Name of the method within the service.
+    full_name (str): Full name of method.
+    index (int): 0-indexed index of the method inside the service.
+    containing_service (ServiceDescriptor): The service that contains this
+      method.
+    input_type (Descriptor): The descriptor of the message that this method
+      accepts.
+    output_type (Descriptor): The descriptor of the message that this method
+      returns.
+    options (descriptor_pb2.MethodOptions or None): Method options message, or
+      None to use default method options.
+  """
+
+  if _USE_C_DESCRIPTORS:
+    _C_DESCRIPTOR_CLASS = _message.MethodDescriptor
+
+    def __new__(cls, name, full_name, index, containing_service,
+                input_type, output_type, options=None, serialized_options=None,
+                create_key=None):
+      _message.Message._CheckCalledFromGeneratedFile()  # pylint: disable=protected-access
+      return _message.default_pool.FindMethodByName(full_name)
+
+  def __init__(self, name, full_name, index, containing_service,
+               input_type, output_type, options=None, serialized_options=None,
+               create_key=None):
+    """The arguments are as described in the description of MethodDescriptor
+    attributes above.
+
+    Note that containing_service may be None, and may be set later if necessary.
+    """
+    if create_key is not _internal_create_key:
+      _Deprecated('MethodDescriptor')
+
+    super(MethodDescriptor, self).__init__(
+        options, serialized_options, 'MethodOptions')
+    self.name = name
+    self.full_name = full_name
+    self.index = index
+    self.containing_service = containing_service
+    self.input_type = input_type
+    self.output_type = output_type
+
+
+class FileDescriptor(DescriptorBase):
+  """Descriptor for a file. Mimics the descriptor_pb2.FileDescriptorProto.
+
+  Note that :attr:`enum_types_by_name`, :attr:`extensions_by_name`, and
+  :attr:`dependencies` fields are only set by the
+  :py:mod:`google.protobuf.message_factory` module, and not by the generated
+  proto code.
+
+  Attributes:
+    name (str): Name of file, relative to root of source tree.
+    package (str): Name of the package
+    syntax (str): string indicating syntax of the file (can be "proto2" or
+      "proto3")
+    serialized_pb (bytes): Byte string of serialized
+      :class:`descriptor_pb2.FileDescriptorProto`.
+    dependencies (list[FileDescriptor]): List of other :class:`FileDescriptor`
+      objects this :class:`FileDescriptor` depends on.
+    public_dependencies (list[FileDescriptor]): A subset of
+      :attr:`dependencies`, which were declared as "public".
+    message_types_by_name (dict(str, Descriptor)): Mapping from message names
+      to their :class:`Desctiptor`.
+    enum_types_by_name (dict(str, EnumDescriptor)): Mapping from enum names to
+      their :class:`EnumDescriptor`.
+    extensions_by_name (dict(str, FieldDescriptor)): Mapping from extension
+      names declared at file scope to their :class:`FieldDescriptor`.
+    services_by_name (dict(str, ServiceDescriptor)): Mapping from services'
+      names to their :class:`ServiceDescriptor`.
+    pool (DescriptorPool): The pool this descriptor belongs to.  When not
+      passed to the constructor, the global default pool is used.
+  """
+
+  if _USE_C_DESCRIPTORS:
+    _C_DESCRIPTOR_CLASS = _message.FileDescriptor
+
+    def __new__(cls, name, package, options=None,
+                serialized_options=None, serialized_pb=None,
+                dependencies=None, public_dependencies=None,
+                syntax=None, pool=None, create_key=None):
+      # FileDescriptor() is called from various places, not only from generated
+      # files, to register dynamic proto files and messages.
+      # pylint: disable=g-explicit-bool-comparison
+      if serialized_pb == b'':
+        # Cpp generated code must be linked in if serialized_pb is ''
+        try:
+          return _message.default_pool.FindFileByName(name)
+        except KeyError:
+          raise RuntimeError('Please link in cpp generated lib for %s' % (name))
+      elif serialized_pb:
+        return _message.default_pool.AddSerializedFile(serialized_pb)
+      else:
+        return super(FileDescriptor, cls).__new__(cls)
+
+  def __init__(self, name, package, options=None,
+               serialized_options=None, serialized_pb=None,
+               dependencies=None, public_dependencies=None,
+               syntax=None, pool=None, create_key=None):
+    """Constructor."""
+    if create_key is not _internal_create_key:
+      _Deprecated('FileDescriptor')
+
+    super(FileDescriptor, self).__init__(
+        options, serialized_options, 'FileOptions')
+
+    if pool is None:
+      from google.protobuf import descriptor_pool
+      pool = descriptor_pool.Default()
+    self.pool = pool
+    self.message_types_by_name = {}
+    self.name = name
+    self.package = package
+    self.syntax = syntax or "proto2"
+    self.serialized_pb = serialized_pb
+
+    self.enum_types_by_name = {}
+    self.extensions_by_name = {}
+    self.services_by_name = {}
+    self.dependencies = (dependencies or [])
+    self.public_dependencies = (public_dependencies or [])
+
+  def CopyToProto(self, proto):
+    """Copies this to a descriptor_pb2.FileDescriptorProto.
+
+    Args:
+      proto: An empty descriptor_pb2.FileDescriptorProto.
+    """
+    proto.ParseFromString(self.serialized_pb)
+
+
+def _ParseOptions(message, string):
+  """Parses serialized options.
+
+  This helper function is used to parse serialized options in generated
+  proto2 files. It must not be used outside proto2.
+  """
+  message.ParseFromString(string)
+  return message
+
+
+def _ToCamelCase(name):
+  """Converts name to camel-case and returns it."""
+  capitalize_next = False
+  result = []
+
+  for c in name:
+    if c == '_':
+      if result:
+        capitalize_next = True
+    elif capitalize_next:
+      result.append(c.upper())
+      capitalize_next = False
+    else:
+      result += c
+
+  # Lower-case the first letter.
+  if result and result[0].isupper():
+    result[0] = result[0].lower()
+  return ''.join(result)
+
+
+def _OptionsOrNone(descriptor_proto):
+  """Returns the value of the field `options`, or None if it is not set."""
+  if descriptor_proto.HasField('options'):
+    return descriptor_proto.options
+  else:
+    return None
+
+
+def _ToJsonName(name):
+  """Converts name to Json name and returns it."""
+  capitalize_next = False
+  result = []
+
+  for c in name:
+    if c == '_':
+      capitalize_next = True
+    elif capitalize_next:
+      result.append(c.upper())
+      capitalize_next = False
+    else:
+      result += c
+
+  return ''.join(result)
+
+
+def MakeDescriptor(desc_proto, package='', build_file_if_cpp=True,
+                   syntax=None):
+  """Make a protobuf Descriptor given a DescriptorProto protobuf.
+
+  Handles nested descriptors. Note that this is limited to the scope of defining
+  a message inside of another message. Composite fields can currently only be
+  resolved if the message is defined in the same scope as the field.
+
+  Args:
+    desc_proto: The descriptor_pb2.DescriptorProto protobuf message.
+    package: Optional package name for the new message Descriptor (string).
+    build_file_if_cpp: Update the C++ descriptor pool if api matches.
+                       Set to False on recursion, so no duplicates are created.
+    syntax: The syntax/semantics that should be used.  Set to "proto3" to get
+            proto3 field presence semantics.
+  Returns:
+    A Descriptor for protobuf messages.
+  """
+  if api_implementation.Type() == 'cpp' and build_file_if_cpp:
+    # The C++ implementation requires all descriptors to be backed by the same
+    # definition in the C++ descriptor pool. To do this, we build a
+    # FileDescriptorProto with the same definition as this descriptor and build
+    # it into the pool.
+    from google.protobuf import descriptor_pb2
+    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
+    file_descriptor_proto.message_type.add().MergeFrom(desc_proto)
+
+    # Generate a random name for this proto file to prevent conflicts with any
+    # imported ones. We need to specify a file name so the descriptor pool
+    # accepts our FileDescriptorProto, but it is not important what that file
+    # name is actually set to.
+    proto_name = binascii.hexlify(os.urandom(16)).decode('ascii')
+
+    if package:
+      file_descriptor_proto.name = os.path.join(package.replace('.', '/'),
+                                                proto_name + '.proto')
+      file_descriptor_proto.package = package
+    else:
+      file_descriptor_proto.name = proto_name + '.proto'
+
+    _message.default_pool.Add(file_descriptor_proto)
+    result = _message.default_pool.FindFileByName(file_descriptor_proto.name)
+
+    if _USE_C_DESCRIPTORS:
+      return result.message_types_by_name[desc_proto.name]
+
+  full_message_name = [desc_proto.name]
+  if package: full_message_name.insert(0, package)
+
+  # Create Descriptors for enum types
+  enum_types = {}
+  for enum_proto in desc_proto.enum_type:
+    full_name = '.'.join(full_message_name + [enum_proto.name])
+    enum_desc = EnumDescriptor(
+        enum_proto.name, full_name, None, [
+            EnumValueDescriptor(enum_val.name, ii, enum_val.number,
+                                create_key=_internal_create_key)
+            for ii, enum_val in enumerate(enum_proto.value)],
+        create_key=_internal_create_key)
+    enum_types[full_name] = enum_desc
+
+  # Create Descriptors for nested types
+  nested_types = {}
+  for nested_proto in desc_proto.nested_type:
+    full_name = '.'.join(full_message_name + [nested_proto.name])
+    # Nested types are just those defined inside of the message, not all types
+    # used by fields in the message, so no loops are possible here.
+    nested_desc = MakeDescriptor(nested_proto,
+                                 package='.'.join(full_message_name),
+                                 build_file_if_cpp=False,
+                                 syntax=syntax)
+    nested_types[full_name] = nested_desc
+
+  fields = []
+  for field_proto in desc_proto.field:
+    full_name = '.'.join(full_message_name + [field_proto.name])
+    enum_desc = None
+    nested_desc = None
+    if field_proto.json_name:
+      json_name = field_proto.json_name
+    else:
+      json_name = None
+    if field_proto.HasField('type_name'):
+      type_name = field_proto.type_name
+      full_type_name = '.'.join(full_message_name +
+                                [type_name[type_name.rfind('.')+1:]])
+      if full_type_name in nested_types:
+        nested_desc = nested_types[full_type_name]
+      elif full_type_name in enum_types:
+        enum_desc = enum_types[full_type_name]
+      # Else type_name references a non-local type, which isn't implemented
+    field = FieldDescriptor(
+        field_proto.name, full_name, field_proto.number - 1,
+        field_proto.number, field_proto.type,
+        FieldDescriptor.ProtoTypeToCppProtoType(field_proto.type),
+        field_proto.label, None, nested_desc, enum_desc, None, False, None,
+        options=_OptionsOrNone(field_proto), has_default_value=False,
+        json_name=json_name, create_key=_internal_create_key)
+    fields.append(field)
+
+  desc_name = '.'.join(full_message_name)
+  return Descriptor(desc_proto.name, desc_name, None, None, fields,
+                    list(nested_types.values()), list(enum_types.values()), [],
+                    options=_OptionsOrNone(desc_proto),
+                    create_key=_internal_create_key)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor_database.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor_database.py
new file mode 100644
index 0000000..5453f50
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor_database.py
@@ -0,0 +1,177 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Provides a container for DescriptorProtos."""
+
+__author__ = 'matthewtoia@google.com (Matt Toia)'
+
+import warnings
+
+
+class Error(Exception):
+  pass
+
+
+class DescriptorDatabaseConflictingDefinitionError(Error):
+  """Raised when a proto is added with the same name & different descriptor."""
+
+
+class DescriptorDatabase(object):
+  """A container accepting FileDescriptorProtos and maps DescriptorProtos."""
+
+  def __init__(self):
+    self._file_desc_protos_by_file = {}
+    self._file_desc_protos_by_symbol = {}
+
+  def Add(self, file_desc_proto):
+    """Adds the FileDescriptorProto and its types to this database.
+
+    Args:
+      file_desc_proto: The FileDescriptorProto to add.
+    Raises:
+      DescriptorDatabaseConflictingDefinitionError: if an attempt is made to
+        add a proto with the same name but different definition than an
+        exisiting proto in the database.
+    """
+    proto_name = file_desc_proto.name
+    if proto_name not in self._file_desc_protos_by_file:
+      self._file_desc_protos_by_file[proto_name] = file_desc_proto
+    elif self._file_desc_protos_by_file[proto_name] != file_desc_proto:
+      raise DescriptorDatabaseConflictingDefinitionError(
+          '%s already added, but with different descriptor.' % proto_name)
+    else:
+      return
+
+    # Add all the top-level descriptors to the index.
+    package = file_desc_proto.package
+    for message in file_desc_proto.message_type:
+      for name in _ExtractSymbols(message, package):
+        self._AddSymbol(name, file_desc_proto)
+    for enum in file_desc_proto.enum_type:
+      self._AddSymbol(('.'.join((package, enum.name))), file_desc_proto)
+      for enum_value in enum.value:
+        self._file_desc_protos_by_symbol[
+            '.'.join((package, enum_value.name))] = file_desc_proto
+    for extension in file_desc_proto.extension:
+      self._AddSymbol(('.'.join((package, extension.name))), file_desc_proto)
+    for service in file_desc_proto.service:
+      self._AddSymbol(('.'.join((package, service.name))), file_desc_proto)
+
+  def FindFileByName(self, name):
+    """Finds the file descriptor proto by file name.
+
+    Typically the file name is a relative path ending to a .proto file. The
+    proto with the given name will have to have been added to this database
+    using the Add method or else an error will be raised.
+
+    Args:
+      name: The file name to find.
+
+    Returns:
+      The file descriptor proto matching the name.
+
+    Raises:
+      KeyError if no file by the given name was added.
+    """
+
+    return self._file_desc_protos_by_file[name]
+
+  def FindFileContainingSymbol(self, symbol):
+    """Finds the file descriptor proto containing the specified symbol.
+
+    The symbol should be a fully qualified name including the file descriptor's
+    package and any containing messages. Some examples:
+
+    'some.package.name.Message'
+    'some.package.name.Message.NestedEnum'
+    'some.package.name.Message.some_field'
+
+    The file descriptor proto containing the specified symbol must be added to
+    this database using the Add method or else an error will be raised.
+
+    Args:
+      symbol: The fully qualified symbol name.
+
+    Returns:
+      The file descriptor proto containing the symbol.
+
+    Raises:
+      KeyError if no file contains the specified symbol.
+    """
+    try:
+      return self._file_desc_protos_by_symbol[symbol]
+    except KeyError:
+      # Fields, enum values, and nested extensions are not in
+      # _file_desc_protos_by_symbol. Try to find the top level
+      # descriptor. Non-existent nested symbol under a valid top level
+      # descriptor can also be found. The behavior is the same with
+      # protobuf C++.
+      top_level, _, _ = symbol.rpartition('.')
+      try:
+        return self._file_desc_protos_by_symbol[top_level]
+      except KeyError:
+        # Raise the original symbol as a KeyError for better diagnostics.
+        raise KeyError(symbol)
+
+  def FindFileContainingExtension(self, extendee_name, extension_number):
+    # TODO(jieluo): implement this API.
+    return None
+
+  def FindAllExtensionNumbers(self, extendee_name):
+    # TODO(jieluo): implement this API.
+    return []
+
+  def _AddSymbol(self, name, file_desc_proto):
+    if name in self._file_desc_protos_by_symbol:
+      warn_msg = ('Conflict register for file "' + file_desc_proto.name +
+                  '": ' + name +
+                  ' is already defined in file "' +
+                  self._file_desc_protos_by_symbol[name].name + '"')
+      warnings.warn(warn_msg, RuntimeWarning)
+    self._file_desc_protos_by_symbol[name] = file_desc_proto
+
+
+def _ExtractSymbols(desc_proto, package):
+  """Pulls out all the symbols from a descriptor proto.
+
+  Args:
+    desc_proto: The proto to extract symbols from.
+    package: The package containing the descriptor type.
+
+  Yields:
+    The fully qualified name found in the descriptor.
+  """
+  message_name = package + '.' + desc_proto.name if package else desc_proto.name
+  yield message_name
+  for nested_type in desc_proto.nested_type:
+    for symbol in _ExtractSymbols(nested_type, message_name):
+      yield symbol
+  for enum_type in desc_proto.enum_type:
+    yield '.'.join((message_name, enum_type.name))
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor_pb2.py
new file mode 100644
index 0000000..5ea666c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor_pb2.py
@@ -0,0 +1,2106 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/descriptor.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/descriptor.proto',
+  package='google.protobuf',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n google/protobuf/descriptor.proto\x12\x0fgoogle.protobuf\"G\n\x11\x46ileDescriptorSet\x12\x32\n\x04\x66ile\x18\x01 \x03(\x0b\x32$.google.protobuf.FileDescriptorProto\"\xdb\x03\n\x13\x46ileDescriptorProto\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x0f\n\x07package\x18\x02 \x01(\t\x12\x12\n\ndependency\x18\x03 \x03(\t\x12\x19\n\x11public_dependency\x18\n \x03(\x05\x12\x17\n\x0fweak_dependency\x18\x0b \x03(\x05\x12\x36\n\x0cmessage_type\x18\x04 \x03(\x0b\x32 .google.protobuf.DescriptorProto\x12\x37\n\tenum_type\x18\x05 \x03(\x0b\x32$.google.protobuf.EnumDescriptorProto\x12\x38\n\x07service\x18\x06 \x03(\x0b\x32\'.google.protobuf.ServiceDescriptorProto\x12\x38\n\textension\x18\x07 \x03(\x0b\x32%.google.protobuf.FieldDescriptorProto\x12-\n\x07options\x18\x08 \x01(\x0b\x32\x1c.google.protobuf.FileOptions\x12\x39\n\x10source_code_info\x18\t \x01(\x0b\x32\x1f.google.protobuf.SourceCodeInfo\x12\x0e\n\x06syntax\x18\x0c 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+
+
+
+_FIELDDESCRIPTORPROTO_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='google.protobuf.FieldDescriptorProto.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_DOUBLE', index=0, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_FLOAT', index=1, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_INT64', index=2, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_UINT64', index=3, number=4,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_INT32', index=4, number=5,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_FIXED64', index=5, number=6,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_FIXED32', index=6, number=7,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_BOOL', index=7, number=8,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_STRING', index=8, number=9,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_GROUP', index=9, number=10,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_MESSAGE', index=10, number=11,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_BYTES', index=11, number=12,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_UINT32', index=12, number=13,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_ENUM', index=13, number=14,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_SFIXED32', index=14, number=15,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_SFIXED64', index=15, number=16,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_SINT32', index=16, number=17,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_SINT64', index=17, number=18,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=1740,
+  serialized_end=2050,
+)
+_sym_db.RegisterEnumDescriptor(_FIELDDESCRIPTORPROTO_TYPE)
+
+_FIELDDESCRIPTORPROTO_LABEL = _descriptor.EnumDescriptor(
+  name='Label',
+  full_name='google.protobuf.FieldDescriptorProto.Label',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='LABEL_OPTIONAL', index=0, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='LABEL_REQUIRED', index=1, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='LABEL_REPEATED', index=2, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=2052,
+  serialized_end=2119,
+)
+_sym_db.RegisterEnumDescriptor(_FIELDDESCRIPTORPROTO_LABEL)
+
+_FILEOPTIONS_OPTIMIZEMODE = _descriptor.EnumDescriptor(
+  name='OptimizeMode',
+  full_name='google.protobuf.FileOptions.OptimizeMode',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='SPEED', index=0, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='CODE_SIZE', index=1, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='LITE_RUNTIME', index=2, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=3686,
+  serialized_end=3744,
+)
+_sym_db.RegisterEnumDescriptor(_FILEOPTIONS_OPTIMIZEMODE)
+
+_FIELDOPTIONS_CTYPE = _descriptor.EnumDescriptor(
+  name='CType',
+  full_name='google.protobuf.FieldOptions.CType',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='STRING', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='CORD', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='STRING_PIECE', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=4304,
+  serialized_end=4351,
+)
+_sym_db.RegisterEnumDescriptor(_FIELDOPTIONS_CTYPE)
+
+_FIELDOPTIONS_JSTYPE = _descriptor.EnumDescriptor(
+  name='JSType',
+  full_name='google.protobuf.FieldOptions.JSType',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='JS_NORMAL', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='JS_STRING', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='JS_NUMBER', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=4353,
+  serialized_end=4406,
+)
+_sym_db.RegisterEnumDescriptor(_FIELDOPTIONS_JSTYPE)
+
+_METHODOPTIONS_IDEMPOTENCYLEVEL = _descriptor.EnumDescriptor(
+  name='IdempotencyLevel',
+  full_name='google.protobuf.MethodOptions.IdempotencyLevel',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='IDEMPOTENCY_UNKNOWN', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='NO_SIDE_EFFECTS', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='IDEMPOTENT', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=5134,
+  serialized_end=5214,
+)
+_sym_db.RegisterEnumDescriptor(_METHODOPTIONS_IDEMPOTENCYLEVEL)
+
+
+_FILEDESCRIPTORSET = _descriptor.Descriptor(
+  name='FileDescriptorSet',
+  full_name='google.protobuf.FileDescriptorSet',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='file', full_name='google.protobuf.FileDescriptorSet.file', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=53,
+  serialized_end=124,
+)
+
+
+_FILEDESCRIPTORPROTO = _descriptor.Descriptor(
+  name='FileDescriptorProto',
+  full_name='google.protobuf.FileDescriptorProto',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.FileDescriptorProto.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='package', full_name='google.protobuf.FileDescriptorProto.package', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dependency', full_name='google.protobuf.FileDescriptorProto.dependency', index=2,
+      number=3, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='public_dependency', full_name='google.protobuf.FileDescriptorProto.public_dependency', index=3,
+      number=10, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='weak_dependency', full_name='google.protobuf.FileDescriptorProto.weak_dependency', index=4,
+      number=11, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='message_type', full_name='google.protobuf.FileDescriptorProto.message_type', index=5,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='enum_type', full_name='google.protobuf.FileDescriptorProto.enum_type', index=6,
+      number=5, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='service', full_name='google.protobuf.FileDescriptorProto.service', index=7,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='extension', full_name='google.protobuf.FileDescriptorProto.extension', index=8,
+      number=7, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.FileDescriptorProto.options', index=9,
+      number=8, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='source_code_info', full_name='google.protobuf.FileDescriptorProto.source_code_info', index=10,
+      number=9, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='syntax', full_name='google.protobuf.FileDescriptorProto.syntax', index=11,
+      number=12, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=127,
+  serialized_end=602,
+)
+
+
+_DESCRIPTORPROTO_EXTENSIONRANGE = _descriptor.Descriptor(
+  name='ExtensionRange',
+  full_name='google.protobuf.DescriptorProto.ExtensionRange',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='start', full_name='google.protobuf.DescriptorProto.ExtensionRange.start', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='end', full_name='google.protobuf.DescriptorProto.ExtensionRange.end', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.DescriptorProto.ExtensionRange.options', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1140,
+  serialized_end=1241,
+)
+
+_DESCRIPTORPROTO_RESERVEDRANGE = _descriptor.Descriptor(
+  name='ReservedRange',
+  full_name='google.protobuf.DescriptorProto.ReservedRange',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='start', full_name='google.protobuf.DescriptorProto.ReservedRange.start', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='end', full_name='google.protobuf.DescriptorProto.ReservedRange.end', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1243,
+  serialized_end=1286,
+)
+
+_DESCRIPTORPROTO = _descriptor.Descriptor(
+  name='DescriptorProto',
+  full_name='google.protobuf.DescriptorProto',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.DescriptorProto.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field', full_name='google.protobuf.DescriptorProto.field', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='extension', full_name='google.protobuf.DescriptorProto.extension', index=2,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_type', full_name='google.protobuf.DescriptorProto.nested_type', index=3,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='enum_type', full_name='google.protobuf.DescriptorProto.enum_type', index=4,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='extension_range', full_name='google.protobuf.DescriptorProto.extension_range', index=5,
+      number=5, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_decl', full_name='google.protobuf.DescriptorProto.oneof_decl', index=6,
+      number=8, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.DescriptorProto.options', index=7,
+      number=7, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='reserved_range', full_name='google.protobuf.DescriptorProto.reserved_range', index=8,
+      number=9, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='reserved_name', full_name='google.protobuf.DescriptorProto.reserved_name', index=9,
+      number=10, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_DESCRIPTORPROTO_EXTENSIONRANGE, _DESCRIPTORPROTO_RESERVEDRANGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=605,
+  serialized_end=1286,
+)
+
+
+_EXTENSIONRANGEOPTIONS = _descriptor.Descriptor(
+  name='ExtensionRangeOptions',
+  full_name='google.protobuf.ExtensionRangeOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='uninterpreted_option', full_name='google.protobuf.ExtensionRangeOptions.uninterpreted_option', index=0,
+      number=999, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=1288,
+  serialized_end=1391,
+)
+
+
+_FIELDDESCRIPTORPROTO = _descriptor.Descriptor(
+  name='FieldDescriptorProto',
+  full_name='google.protobuf.FieldDescriptorProto',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.FieldDescriptorProto.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='number', full_name='google.protobuf.FieldDescriptorProto.number', index=1,
+      number=3, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='label', full_name='google.protobuf.FieldDescriptorProto.label', index=2,
+      number=4, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='type', full_name='google.protobuf.FieldDescriptorProto.type', index=3,
+      number=5, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='type_name', full_name='google.protobuf.FieldDescriptorProto.type_name', index=4,
+      number=6, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='extendee', full_name='google.protobuf.FieldDescriptorProto.extendee', index=5,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_value', full_name='google.protobuf.FieldDescriptorProto.default_value', index=6,
+      number=7, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_index', full_name='google.protobuf.FieldDescriptorProto.oneof_index', index=7,
+      number=9, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='json_name', full_name='google.protobuf.FieldDescriptorProto.json_name', index=8,
+      number=10, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.FieldDescriptorProto.options', index=9,
+      number=8, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='proto3_optional', full_name='google.protobuf.FieldDescriptorProto.proto3_optional', index=10,
+      number=17, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _FIELDDESCRIPTORPROTO_TYPE,
+    _FIELDDESCRIPTORPROTO_LABEL,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1394,
+  serialized_end=2119,
+)
+
+
+_ONEOFDESCRIPTORPROTO = _descriptor.Descriptor(
+  name='OneofDescriptorProto',
+  full_name='google.protobuf.OneofDescriptorProto',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.OneofDescriptorProto.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.OneofDescriptorProto.options', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2121,
+  serialized_end=2205,
+)
+
+
+_ENUMDESCRIPTORPROTO_ENUMRESERVEDRANGE = _descriptor.Descriptor(
+  name='EnumReservedRange',
+  full_name='google.protobuf.EnumDescriptorProto.EnumReservedRange',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='start', full_name='google.protobuf.EnumDescriptorProto.EnumReservedRange.start', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='end', full_name='google.protobuf.EnumDescriptorProto.EnumReservedRange.end', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2453,
+  serialized_end=2500,
+)
+
+_ENUMDESCRIPTORPROTO = _descriptor.Descriptor(
+  name='EnumDescriptorProto',
+  full_name='google.protobuf.EnumDescriptorProto',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.EnumDescriptorProto.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.EnumDescriptorProto.value', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.EnumDescriptorProto.options', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='reserved_range', full_name='google.protobuf.EnumDescriptorProto.reserved_range', index=3,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='reserved_name', full_name='google.protobuf.EnumDescriptorProto.reserved_name', index=4,
+      number=5, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_ENUMDESCRIPTORPROTO_ENUMRESERVEDRANGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2208,
+  serialized_end=2500,
+)
+
+
+_ENUMVALUEDESCRIPTORPROTO = _descriptor.Descriptor(
+  name='EnumValueDescriptorProto',
+  full_name='google.protobuf.EnumValueDescriptorProto',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.EnumValueDescriptorProto.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='number', full_name='google.protobuf.EnumValueDescriptorProto.number', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.EnumValueDescriptorProto.options', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2502,
+  serialized_end=2610,
+)
+
+
+_SERVICEDESCRIPTORPROTO = _descriptor.Descriptor(
+  name='ServiceDescriptorProto',
+  full_name='google.protobuf.ServiceDescriptorProto',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.ServiceDescriptorProto.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='method', full_name='google.protobuf.ServiceDescriptorProto.method', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.ServiceDescriptorProto.options', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2613,
+  serialized_end=2757,
+)
+
+
+_METHODDESCRIPTORPROTO = _descriptor.Descriptor(
+  name='MethodDescriptorProto',
+  full_name='google.protobuf.MethodDescriptorProto',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.MethodDescriptorProto.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='input_type', full_name='google.protobuf.MethodDescriptorProto.input_type', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='output_type', full_name='google.protobuf.MethodDescriptorProto.output_type', index=2,
+      number=3, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.MethodDescriptorProto.options', index=3,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='client_streaming', full_name='google.protobuf.MethodDescriptorProto.client_streaming', index=4,
+      number=5, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='server_streaming', full_name='google.protobuf.MethodDescriptorProto.server_streaming', index=5,
+      number=6, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2760,
+  serialized_end=2953,
+)
+
+
+_FILEOPTIONS = _descriptor.Descriptor(
+  name='FileOptions',
+  full_name='google.protobuf.FileOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='java_package', full_name='google.protobuf.FileOptions.java_package', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='java_outer_classname', full_name='google.protobuf.FileOptions.java_outer_classname', index=1,
+      number=8, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='java_multiple_files', full_name='google.protobuf.FileOptions.java_multiple_files', index=2,
+      number=10, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='java_generate_equals_and_hash', full_name='google.protobuf.FileOptions.java_generate_equals_and_hash', index=3,
+      number=20, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='java_string_check_utf8', full_name='google.protobuf.FileOptions.java_string_check_utf8', index=4,
+      number=27, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optimize_for', full_name='google.protobuf.FileOptions.optimize_for', index=5,
+      number=9, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='go_package', full_name='google.protobuf.FileOptions.go_package', index=6,
+      number=11, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='cc_generic_services', full_name='google.protobuf.FileOptions.cc_generic_services', index=7,
+      number=16, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='java_generic_services', full_name='google.protobuf.FileOptions.java_generic_services', index=8,
+      number=17, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='py_generic_services', full_name='google.protobuf.FileOptions.py_generic_services', index=9,
+      number=18, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='php_generic_services', full_name='google.protobuf.FileOptions.php_generic_services', index=10,
+      number=42, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='deprecated', full_name='google.protobuf.FileOptions.deprecated', index=11,
+      number=23, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='cc_enable_arenas', full_name='google.protobuf.FileOptions.cc_enable_arenas', index=12,
+      number=31, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=True,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='objc_class_prefix', full_name='google.protobuf.FileOptions.objc_class_prefix', index=13,
+      number=36, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='csharp_namespace', full_name='google.protobuf.FileOptions.csharp_namespace', index=14,
+      number=37, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='swift_prefix', full_name='google.protobuf.FileOptions.swift_prefix', index=15,
+      number=39, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='php_class_prefix', full_name='google.protobuf.FileOptions.php_class_prefix', index=16,
+      number=40, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='php_namespace', full_name='google.protobuf.FileOptions.php_namespace', index=17,
+      number=41, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='php_metadata_namespace', full_name='google.protobuf.FileOptions.php_metadata_namespace', index=18,
+      number=44, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='ruby_package', full_name='google.protobuf.FileOptions.ruby_package', index=19,
+      number=45, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uninterpreted_option', full_name='google.protobuf.FileOptions.uninterpreted_option', index=20,
+      number=999, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _FILEOPTIONS_OPTIMIZEMODE,
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=2956,
+  serialized_end=3761,
+)
+
+
+_MESSAGEOPTIONS = _descriptor.Descriptor(
+  name='MessageOptions',
+  full_name='google.protobuf.MessageOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='message_set_wire_format', full_name='google.protobuf.MessageOptions.message_set_wire_format', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='no_standard_descriptor_accessor', full_name='google.protobuf.MessageOptions.no_standard_descriptor_accessor', index=1,
+      number=2, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='deprecated', full_name='google.protobuf.MessageOptions.deprecated', index=2,
+      number=3, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_entry', full_name='google.protobuf.MessageOptions.map_entry', index=3,
+      number=7, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uninterpreted_option', full_name='google.protobuf.MessageOptions.uninterpreted_option', index=4,
+      number=999, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=3764,
+  serialized_end=4006,
+)
+
+
+_FIELDOPTIONS = _descriptor.Descriptor(
+  name='FieldOptions',
+  full_name='google.protobuf.FieldOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='ctype', full_name='google.protobuf.FieldOptions.ctype', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed', full_name='google.protobuf.FieldOptions.packed', index=1,
+      number=2, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='jstype', full_name='google.protobuf.FieldOptions.jstype', index=2,
+      number=6, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='lazy', full_name='google.protobuf.FieldOptions.lazy', index=3,
+      number=5, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='deprecated', full_name='google.protobuf.FieldOptions.deprecated', index=4,
+      number=3, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='weak', full_name='google.protobuf.FieldOptions.weak', index=5,
+      number=10, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uninterpreted_option', full_name='google.protobuf.FieldOptions.uninterpreted_option', index=6,
+      number=999, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _FIELDOPTIONS_CTYPE,
+    _FIELDOPTIONS_JSTYPE,
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=4009,
+  serialized_end=4423,
+)
+
+
+_ONEOFOPTIONS = _descriptor.Descriptor(
+  name='OneofOptions',
+  full_name='google.protobuf.OneofOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='uninterpreted_option', full_name='google.protobuf.OneofOptions.uninterpreted_option', index=0,
+      number=999, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=4425,
+  serialized_end=4519,
+)
+
+
+_ENUMOPTIONS = _descriptor.Descriptor(
+  name='EnumOptions',
+  full_name='google.protobuf.EnumOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='allow_alias', full_name='google.protobuf.EnumOptions.allow_alias', index=0,
+      number=2, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='deprecated', full_name='google.protobuf.EnumOptions.deprecated', index=1,
+      number=3, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uninterpreted_option', full_name='google.protobuf.EnumOptions.uninterpreted_option', index=2,
+      number=999, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=4522,
+  serialized_end=4669,
+)
+
+
+_ENUMVALUEOPTIONS = _descriptor.Descriptor(
+  name='EnumValueOptions',
+  full_name='google.protobuf.EnumValueOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='deprecated', full_name='google.protobuf.EnumValueOptions.deprecated', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uninterpreted_option', full_name='google.protobuf.EnumValueOptions.uninterpreted_option', index=1,
+      number=999, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=4671,
+  serialized_end=4796,
+)
+
+
+_SERVICEOPTIONS = _descriptor.Descriptor(
+  name='ServiceOptions',
+  full_name='google.protobuf.ServiceOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='deprecated', full_name='google.protobuf.ServiceOptions.deprecated', index=0,
+      number=33, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uninterpreted_option', full_name='google.protobuf.ServiceOptions.uninterpreted_option', index=1,
+      number=999, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=4798,
+  serialized_end=4921,
+)
+
+
+_METHODOPTIONS = _descriptor.Descriptor(
+  name='MethodOptions',
+  full_name='google.protobuf.MethodOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='deprecated', full_name='google.protobuf.MethodOptions.deprecated', index=0,
+      number=33, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='idempotency_level', full_name='google.protobuf.MethodOptions.idempotency_level', index=1,
+      number=34, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uninterpreted_option', full_name='google.protobuf.MethodOptions.uninterpreted_option', index=2,
+      number=999, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _METHODOPTIONS_IDEMPOTENCYLEVEL,
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=4924,
+  serialized_end=5225,
+)
+
+
+_UNINTERPRETEDOPTION_NAMEPART = _descriptor.Descriptor(
+  name='NamePart',
+  full_name='google.protobuf.UninterpretedOption.NamePart',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name_part', full_name='google.protobuf.UninterpretedOption.NamePart.name_part', index=0,
+      number=1, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='is_extension', full_name='google.protobuf.UninterpretedOption.NamePart.is_extension', index=1,
+      number=2, type=8, cpp_type=7, label=2,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5463,
+  serialized_end=5514,
+)
+
+_UNINTERPRETEDOPTION = _descriptor.Descriptor(
+  name='UninterpretedOption',
+  full_name='google.protobuf.UninterpretedOption',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.UninterpretedOption.name', index=0,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='identifier_value', full_name='google.protobuf.UninterpretedOption.identifier_value', index=1,
+      number=3, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='positive_int_value', full_name='google.protobuf.UninterpretedOption.positive_int_value', index=2,
+      number=4, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='negative_int_value', full_name='google.protobuf.UninterpretedOption.negative_int_value', index=3,
+      number=5, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='double_value', full_name='google.protobuf.UninterpretedOption.double_value', index=4,
+      number=6, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_value', full_name='google.protobuf.UninterpretedOption.string_value', index=5,
+      number=7, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='aggregate_value', full_name='google.protobuf.UninterpretedOption.aggregate_value', index=6,
+      number=8, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_UNINTERPRETEDOPTION_NAMEPART, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5228,
+  serialized_end=5514,
+)
+
+
+_SOURCECODEINFO_LOCATION = _descriptor.Descriptor(
+  name='Location',
+  full_name='google.protobuf.SourceCodeInfo.Location',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='path', full_name='google.protobuf.SourceCodeInfo.Location.path', index=0,
+      number=1, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='span', full_name='google.protobuf.SourceCodeInfo.Location.span', index=1,
+      number=2, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='leading_comments', full_name='google.protobuf.SourceCodeInfo.Location.leading_comments', index=2,
+      number=3, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='trailing_comments', full_name='google.protobuf.SourceCodeInfo.Location.trailing_comments', index=3,
+      number=4, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='leading_detached_comments', full_name='google.protobuf.SourceCodeInfo.Location.leading_detached_comments', index=4,
+      number=6, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5596,
+  serialized_end=5730,
+)
+
+_SOURCECODEINFO = _descriptor.Descriptor(
+  name='SourceCodeInfo',
+  full_name='google.protobuf.SourceCodeInfo',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='location', full_name='google.protobuf.SourceCodeInfo.location', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_SOURCECODEINFO_LOCATION, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
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+
+
+_GENERATEDCODEINFO_ANNOTATION = _descriptor.Descriptor(
+  name='Annotation',
+  full_name='google.protobuf.GeneratedCodeInfo.Annotation',
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+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      message_type=None, enum_type=None, containing_type=None,
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+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+  enum_types=[
+  ],
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+  syntax='proto2',
+  extension_ranges=[],
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+)
+
+_GENERATEDCODEINFO = _descriptor.Descriptor(
+  name='GeneratedCodeInfo',
+  full_name='google.protobuf.GeneratedCodeInfo',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
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+    _descriptor.FieldDescriptor(
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+      has_default_value=False, default_value=[],
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+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
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+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5733,
+  serialized_end=5900,
+)
+
+_FILEDESCRIPTORSET.fields_by_name['file'].message_type = _FILEDESCRIPTORPROTO
+_FILEDESCRIPTORPROTO.fields_by_name['message_type'].message_type = _DESCRIPTORPROTO
+_FILEDESCRIPTORPROTO.fields_by_name['enum_type'].message_type = _ENUMDESCRIPTORPROTO
+_FILEDESCRIPTORPROTO.fields_by_name['service'].message_type = _SERVICEDESCRIPTORPROTO
+_FILEDESCRIPTORPROTO.fields_by_name['extension'].message_type = _FIELDDESCRIPTORPROTO
+_FILEDESCRIPTORPROTO.fields_by_name['options'].message_type = _FILEOPTIONS
+_FILEDESCRIPTORPROTO.fields_by_name['source_code_info'].message_type = _SOURCECODEINFO
+_DESCRIPTORPROTO_EXTENSIONRANGE.fields_by_name['options'].message_type = _EXTENSIONRANGEOPTIONS
+_DESCRIPTORPROTO_EXTENSIONRANGE.containing_type = _DESCRIPTORPROTO
+_DESCRIPTORPROTO_RESERVEDRANGE.containing_type = _DESCRIPTORPROTO
+_DESCRIPTORPROTO.fields_by_name['field'].message_type = _FIELDDESCRIPTORPROTO
+_DESCRIPTORPROTO.fields_by_name['extension'].message_type = _FIELDDESCRIPTORPROTO
+_DESCRIPTORPROTO.fields_by_name['nested_type'].message_type = _DESCRIPTORPROTO
+_DESCRIPTORPROTO.fields_by_name['enum_type'].message_type = _ENUMDESCRIPTORPROTO
+_DESCRIPTORPROTO.fields_by_name['extension_range'].message_type = _DESCRIPTORPROTO_EXTENSIONRANGE
+_DESCRIPTORPROTO.fields_by_name['oneof_decl'].message_type = _ONEOFDESCRIPTORPROTO
+_DESCRIPTORPROTO.fields_by_name['options'].message_type = _MESSAGEOPTIONS
+_DESCRIPTORPROTO.fields_by_name['reserved_range'].message_type = _DESCRIPTORPROTO_RESERVEDRANGE
+_EXTENSIONRANGEOPTIONS.fields_by_name['uninterpreted_option'].message_type = _UNINTERPRETEDOPTION
+_FIELDDESCRIPTORPROTO.fields_by_name['label'].enum_type = _FIELDDESCRIPTORPROTO_LABEL
+_FIELDDESCRIPTORPROTO.fields_by_name['type'].enum_type = _FIELDDESCRIPTORPROTO_TYPE
+_FIELDDESCRIPTORPROTO.fields_by_name['options'].message_type = _FIELDOPTIONS
+_FIELDDESCRIPTORPROTO_TYPE.containing_type = _FIELDDESCRIPTORPROTO
+_FIELDDESCRIPTORPROTO_LABEL.containing_type = _FIELDDESCRIPTORPROTO
+_ONEOFDESCRIPTORPROTO.fields_by_name['options'].message_type = _ONEOFOPTIONS
+_ENUMDESCRIPTORPROTO_ENUMRESERVEDRANGE.containing_type = _ENUMDESCRIPTORPROTO
+_ENUMDESCRIPTORPROTO.fields_by_name['value'].message_type = _ENUMVALUEDESCRIPTORPROTO
+_ENUMDESCRIPTORPROTO.fields_by_name['options'].message_type = _ENUMOPTIONS
+_ENUMDESCRIPTORPROTO.fields_by_name['reserved_range'].message_type = _ENUMDESCRIPTORPROTO_ENUMRESERVEDRANGE
+_ENUMVALUEDESCRIPTORPROTO.fields_by_name['options'].message_type = _ENUMVALUEOPTIONS
+_SERVICEDESCRIPTORPROTO.fields_by_name['method'].message_type = _METHODDESCRIPTORPROTO
+_SERVICEDESCRIPTORPROTO.fields_by_name['options'].message_type = _SERVICEOPTIONS
+_METHODDESCRIPTORPROTO.fields_by_name['options'].message_type = _METHODOPTIONS
+_FILEOPTIONS.fields_by_name['optimize_for'].enum_type = _FILEOPTIONS_OPTIMIZEMODE
+_FILEOPTIONS.fields_by_name['uninterpreted_option'].message_type = _UNINTERPRETEDOPTION
+_FILEOPTIONS_OPTIMIZEMODE.containing_type = _FILEOPTIONS
+_MESSAGEOPTIONS.fields_by_name['uninterpreted_option'].message_type = _UNINTERPRETEDOPTION
+_FIELDOPTIONS.fields_by_name['ctype'].enum_type = _FIELDOPTIONS_CTYPE
+_FIELDOPTIONS.fields_by_name['jstype'].enum_type = _FIELDOPTIONS_JSTYPE
+_FIELDOPTIONS.fields_by_name['uninterpreted_option'].message_type = _UNINTERPRETEDOPTION
+_FIELDOPTIONS_CTYPE.containing_type = _FIELDOPTIONS
+_FIELDOPTIONS_JSTYPE.containing_type = _FIELDOPTIONS
+_ONEOFOPTIONS.fields_by_name['uninterpreted_option'].message_type = _UNINTERPRETEDOPTION
+_ENUMOPTIONS.fields_by_name['uninterpreted_option'].message_type = _UNINTERPRETEDOPTION
+_ENUMVALUEOPTIONS.fields_by_name['uninterpreted_option'].message_type = _UNINTERPRETEDOPTION
+_SERVICEOPTIONS.fields_by_name['uninterpreted_option'].message_type = _UNINTERPRETEDOPTION
+_METHODOPTIONS.fields_by_name['idempotency_level'].enum_type = _METHODOPTIONS_IDEMPOTENCYLEVEL
+_METHODOPTIONS.fields_by_name['uninterpreted_option'].message_type = _UNINTERPRETEDOPTION
+_METHODOPTIONS_IDEMPOTENCYLEVEL.containing_type = _METHODOPTIONS
+_UNINTERPRETEDOPTION_NAMEPART.containing_type = _UNINTERPRETEDOPTION
+_UNINTERPRETEDOPTION.fields_by_name['name'].message_type = _UNINTERPRETEDOPTION_NAMEPART
+_SOURCECODEINFO_LOCATION.containing_type = _SOURCECODEINFO
+_SOURCECODEINFO.fields_by_name['location'].message_type = _SOURCECODEINFO_LOCATION
+_GENERATEDCODEINFO_ANNOTATION.containing_type = _GENERATEDCODEINFO
+_GENERATEDCODEINFO.fields_by_name['annotation'].message_type = _GENERATEDCODEINFO_ANNOTATION
+DESCRIPTOR.message_types_by_name['FileDescriptorSet'] = _FILEDESCRIPTORSET
+DESCRIPTOR.message_types_by_name['FileDescriptorProto'] = _FILEDESCRIPTORPROTO
+DESCRIPTOR.message_types_by_name['DescriptorProto'] = _DESCRIPTORPROTO
+DESCRIPTOR.message_types_by_name['ExtensionRangeOptions'] = _EXTENSIONRANGEOPTIONS
+DESCRIPTOR.message_types_by_name['FieldDescriptorProto'] = _FIELDDESCRIPTORPROTO
+DESCRIPTOR.message_types_by_name['OneofDescriptorProto'] = _ONEOFDESCRIPTORPROTO
+DESCRIPTOR.message_types_by_name['EnumDescriptorProto'] = _ENUMDESCRIPTORPROTO
+DESCRIPTOR.message_types_by_name['EnumValueDescriptorProto'] = _ENUMVALUEDESCRIPTORPROTO
+DESCRIPTOR.message_types_by_name['ServiceDescriptorProto'] = _SERVICEDESCRIPTORPROTO
+DESCRIPTOR.message_types_by_name['MethodDescriptorProto'] = _METHODDESCRIPTORPROTO
+DESCRIPTOR.message_types_by_name['FileOptions'] = _FILEOPTIONS
+DESCRIPTOR.message_types_by_name['MessageOptions'] = _MESSAGEOPTIONS
+DESCRIPTOR.message_types_by_name['FieldOptions'] = _FIELDOPTIONS
+DESCRIPTOR.message_types_by_name['OneofOptions'] = _ONEOFOPTIONS
+DESCRIPTOR.message_types_by_name['EnumOptions'] = _ENUMOPTIONS
+DESCRIPTOR.message_types_by_name['EnumValueOptions'] = _ENUMVALUEOPTIONS
+DESCRIPTOR.message_types_by_name['ServiceOptions'] = _SERVICEOPTIONS
+DESCRIPTOR.message_types_by_name['MethodOptions'] = _METHODOPTIONS
+DESCRIPTOR.message_types_by_name['UninterpretedOption'] = _UNINTERPRETEDOPTION
+DESCRIPTOR.message_types_by_name['SourceCodeInfo'] = _SOURCECODEINFO
+DESCRIPTOR.message_types_by_name['GeneratedCodeInfo'] = _GENERATEDCODEINFO
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+FileDescriptorSet = _reflection.GeneratedProtocolMessageType('FileDescriptorSet', (_message.Message,), {
+  'DESCRIPTOR' : _FILEDESCRIPTORSET,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.FileDescriptorSet)
+  })
+_sym_db.RegisterMessage(FileDescriptorSet)
+
+FileDescriptorProto = _reflection.GeneratedProtocolMessageType('FileDescriptorProto', (_message.Message,), {
+  'DESCRIPTOR' : _FILEDESCRIPTORPROTO,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.FileDescriptorProto)
+  })
+_sym_db.RegisterMessage(FileDescriptorProto)
+
+DescriptorProto = _reflection.GeneratedProtocolMessageType('DescriptorProto', (_message.Message,), {
+
+  'ExtensionRange' : _reflection.GeneratedProtocolMessageType('ExtensionRange', (_message.Message,), {
+    'DESCRIPTOR' : _DESCRIPTORPROTO_EXTENSIONRANGE,
+    '__module__' : 'google.protobuf.descriptor_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.DescriptorProto.ExtensionRange)
+    })
+  ,
+
+  'ReservedRange' : _reflection.GeneratedProtocolMessageType('ReservedRange', (_message.Message,), {
+    'DESCRIPTOR' : _DESCRIPTORPROTO_RESERVEDRANGE,
+    '__module__' : 'google.protobuf.descriptor_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.DescriptorProto.ReservedRange)
+    })
+  ,
+  'DESCRIPTOR' : _DESCRIPTORPROTO,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.DescriptorProto)
+  })
+_sym_db.RegisterMessage(DescriptorProto)
+_sym_db.RegisterMessage(DescriptorProto.ExtensionRange)
+_sym_db.RegisterMessage(DescriptorProto.ReservedRange)
+
+ExtensionRangeOptions = _reflection.GeneratedProtocolMessageType('ExtensionRangeOptions', (_message.Message,), {
+  'DESCRIPTOR' : _EXTENSIONRANGEOPTIONS,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.ExtensionRangeOptions)
+  })
+_sym_db.RegisterMessage(ExtensionRangeOptions)
+
+FieldDescriptorProto = _reflection.GeneratedProtocolMessageType('FieldDescriptorProto', (_message.Message,), {
+  'DESCRIPTOR' : _FIELDDESCRIPTORPROTO,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.FieldDescriptorProto)
+  })
+_sym_db.RegisterMessage(FieldDescriptorProto)
+
+OneofDescriptorProto = _reflection.GeneratedProtocolMessageType('OneofDescriptorProto', (_message.Message,), {
+  'DESCRIPTOR' : _ONEOFDESCRIPTORPROTO,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.OneofDescriptorProto)
+  })
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+EnumDescriptorProto = _reflection.GeneratedProtocolMessageType('EnumDescriptorProto', (_message.Message,), {
+
+  'EnumReservedRange' : _reflection.GeneratedProtocolMessageType('EnumReservedRange', (_message.Message,), {
+    'DESCRIPTOR' : _ENUMDESCRIPTORPROTO_ENUMRESERVEDRANGE,
+    '__module__' : 'google.protobuf.descriptor_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.EnumDescriptorProto.EnumReservedRange)
+    })
+  ,
+  'DESCRIPTOR' : _ENUMDESCRIPTORPROTO,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.EnumDescriptorProto)
+  })
+_sym_db.RegisterMessage(EnumDescriptorProto)
+_sym_db.RegisterMessage(EnumDescriptorProto.EnumReservedRange)
+
+EnumValueDescriptorProto = _reflection.GeneratedProtocolMessageType('EnumValueDescriptorProto', (_message.Message,), {
+  'DESCRIPTOR' : _ENUMVALUEDESCRIPTORPROTO,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.EnumValueDescriptorProto)
+  })
+_sym_db.RegisterMessage(EnumValueDescriptorProto)
+
+ServiceDescriptorProto = _reflection.GeneratedProtocolMessageType('ServiceDescriptorProto', (_message.Message,), {
+  'DESCRIPTOR' : _SERVICEDESCRIPTORPROTO,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.ServiceDescriptorProto)
+  })
+_sym_db.RegisterMessage(ServiceDescriptorProto)
+
+MethodDescriptorProto = _reflection.GeneratedProtocolMessageType('MethodDescriptorProto', (_message.Message,), {
+  'DESCRIPTOR' : _METHODDESCRIPTORPROTO,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.MethodDescriptorProto)
+  })
+_sym_db.RegisterMessage(MethodDescriptorProto)
+
+FileOptions = _reflection.GeneratedProtocolMessageType('FileOptions', (_message.Message,), {
+  'DESCRIPTOR' : _FILEOPTIONS,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.FileOptions)
+  })
+_sym_db.RegisterMessage(FileOptions)
+
+MessageOptions = _reflection.GeneratedProtocolMessageType('MessageOptions', (_message.Message,), {
+  'DESCRIPTOR' : _MESSAGEOPTIONS,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.MessageOptions)
+  })
+_sym_db.RegisterMessage(MessageOptions)
+
+FieldOptions = _reflection.GeneratedProtocolMessageType('FieldOptions', (_message.Message,), {
+  'DESCRIPTOR' : _FIELDOPTIONS,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.FieldOptions)
+  })
+_sym_db.RegisterMessage(FieldOptions)
+
+OneofOptions = _reflection.GeneratedProtocolMessageType('OneofOptions', (_message.Message,), {
+  'DESCRIPTOR' : _ONEOFOPTIONS,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.OneofOptions)
+  })
+_sym_db.RegisterMessage(OneofOptions)
+
+EnumOptions = _reflection.GeneratedProtocolMessageType('EnumOptions', (_message.Message,), {
+  'DESCRIPTOR' : _ENUMOPTIONS,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.EnumOptions)
+  })
+_sym_db.RegisterMessage(EnumOptions)
+
+EnumValueOptions = _reflection.GeneratedProtocolMessageType('EnumValueOptions', (_message.Message,), {
+  'DESCRIPTOR' : _ENUMVALUEOPTIONS,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.EnumValueOptions)
+  })
+_sym_db.RegisterMessage(EnumValueOptions)
+
+ServiceOptions = _reflection.GeneratedProtocolMessageType('ServiceOptions', (_message.Message,), {
+  'DESCRIPTOR' : _SERVICEOPTIONS,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.ServiceOptions)
+  })
+_sym_db.RegisterMessage(ServiceOptions)
+
+MethodOptions = _reflection.GeneratedProtocolMessageType('MethodOptions', (_message.Message,), {
+  'DESCRIPTOR' : _METHODOPTIONS,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.MethodOptions)
+  })
+_sym_db.RegisterMessage(MethodOptions)
+
+UninterpretedOption = _reflection.GeneratedProtocolMessageType('UninterpretedOption', (_message.Message,), {
+
+  'NamePart' : _reflection.GeneratedProtocolMessageType('NamePart', (_message.Message,), {
+    'DESCRIPTOR' : _UNINTERPRETEDOPTION_NAMEPART,
+    '__module__' : 'google.protobuf.descriptor_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.UninterpretedOption.NamePart)
+    })
+  ,
+  'DESCRIPTOR' : _UNINTERPRETEDOPTION,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.UninterpretedOption)
+  })
+_sym_db.RegisterMessage(UninterpretedOption)
+_sym_db.RegisterMessage(UninterpretedOption.NamePart)
+
+SourceCodeInfo = _reflection.GeneratedProtocolMessageType('SourceCodeInfo', (_message.Message,), {
+
+  'Location' : _reflection.GeneratedProtocolMessageType('Location', (_message.Message,), {
+    'DESCRIPTOR' : _SOURCECODEINFO_LOCATION,
+    '__module__' : 'google.protobuf.descriptor_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.SourceCodeInfo.Location)
+    })
+  ,
+  'DESCRIPTOR' : _SOURCECODEINFO,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.SourceCodeInfo)
+  })
+_sym_db.RegisterMessage(SourceCodeInfo)
+_sym_db.RegisterMessage(SourceCodeInfo.Location)
+
+GeneratedCodeInfo = _reflection.GeneratedProtocolMessageType('GeneratedCodeInfo', (_message.Message,), {
+
+  'Annotation' : _reflection.GeneratedProtocolMessageType('Annotation', (_message.Message,), {
+    'DESCRIPTOR' : _GENERATEDCODEINFO_ANNOTATION,
+    '__module__' : 'google.protobuf.descriptor_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.GeneratedCodeInfo.Annotation)
+    })
+  ,
+  'DESCRIPTOR' : _GENERATEDCODEINFO,
+  '__module__' : 'google.protobuf.descriptor_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.GeneratedCodeInfo)
+  })
+_sym_db.RegisterMessage(GeneratedCodeInfo)
+_sym_db.RegisterMessage(GeneratedCodeInfo.Annotation)
+
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor_pool.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor_pool.py
new file mode 100644
index 0000000..de9100b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/descriptor_pool.py
@@ -0,0 +1,1271 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Provides DescriptorPool to use as a container for proto2 descriptors.
+
+The DescriptorPool is used in conjection with a DescriptorDatabase to maintain
+a collection of protocol buffer descriptors for use when dynamically creating
+message types at runtime.
+
+For most applications protocol buffers should be used via modules generated by
+the protocol buffer compiler tool. This should only be used when the type of
+protocol buffers used in an application or library cannot be predetermined.
+
+Below is a straightforward example on how to use this class::
+
+  pool = DescriptorPool()
+  file_descriptor_protos = [ ... ]
+  for file_descriptor_proto in file_descriptor_protos:
+    pool.Add(file_descriptor_proto)
+  my_message_descriptor = pool.FindMessageTypeByName('some.package.MessageType')
+
+The message descriptor can be used in conjunction with the message_factory
+module in order to create a protocol buffer class that can be encoded and
+decoded.
+
+If you want to get a Python class for the specified proto, use the
+helper functions inside google.protobuf.message_factory
+directly instead of this class.
+"""
+
+__author__ = 'matthewtoia@google.com (Matt Toia)'
+
+import collections
+import warnings
+
+from google.protobuf import descriptor
+from google.protobuf import descriptor_database
+from google.protobuf import text_encoding
+
+
+_USE_C_DESCRIPTORS = descriptor._USE_C_DESCRIPTORS  # pylint: disable=protected-access
+
+
+def _Deprecated(func):
+  """Mark functions as deprecated."""
+
+  def NewFunc(*args, **kwargs):
+    warnings.warn(
+        'Call to deprecated function %s(). Note: Do add unlinked descriptors '
+        'to descriptor_pool is wrong. Use Add() or AddSerializedFile() '
+        'instead.' % func.__name__,
+        category=DeprecationWarning)
+    return func(*args, **kwargs)
+  NewFunc.__name__ = func.__name__
+  NewFunc.__doc__ = func.__doc__
+  NewFunc.__dict__.update(func.__dict__)
+  return NewFunc
+
+
+def _NormalizeFullyQualifiedName(name):
+  """Remove leading period from fully-qualified type name.
+
+  Due to b/13860351 in descriptor_database.py, types in the root namespace are
+  generated with a leading period. This function removes that prefix.
+
+  Args:
+    name (str): The fully-qualified symbol name.
+
+  Returns:
+    str: The normalized fully-qualified symbol name.
+  """
+  return name.lstrip('.')
+
+
+def _OptionsOrNone(descriptor_proto):
+  """Returns the value of the field `options`, or None if it is not set."""
+  if descriptor_proto.HasField('options'):
+    return descriptor_proto.options
+  else:
+    return None
+
+
+def _IsMessageSetExtension(field):
+  return (field.is_extension and
+          field.containing_type.has_options and
+          field.containing_type.GetOptions().message_set_wire_format and
+          field.type == descriptor.FieldDescriptor.TYPE_MESSAGE and
+          field.label == descriptor.FieldDescriptor.LABEL_OPTIONAL)
+
+
+class DescriptorPool(object):
+  """A collection of protobufs dynamically constructed by descriptor protos."""
+
+  if _USE_C_DESCRIPTORS:
+
+    def __new__(cls, descriptor_db=None):
+      # pylint: disable=protected-access
+      return descriptor._message.DescriptorPool(descriptor_db)
+
+  def __init__(self, descriptor_db=None):
+    """Initializes a Pool of proto buffs.
+
+    The descriptor_db argument to the constructor is provided to allow
+    specialized file descriptor proto lookup code to be triggered on demand. An
+    example would be an implementation which will read and compile a file
+    specified in a call to FindFileByName() and not require the call to Add()
+    at all. Results from this database will be cached internally here as well.
+
+    Args:
+      descriptor_db: A secondary source of file descriptors.
+    """
+
+    self._internal_db = descriptor_database.DescriptorDatabase()
+    self._descriptor_db = descriptor_db
+    self._descriptors = {}
+    self._enum_descriptors = {}
+    self._service_descriptors = {}
+    self._file_descriptors = {}
+    self._toplevel_extensions = {}
+    # TODO(jieluo): Remove _file_desc_by_toplevel_extension after
+    # maybe year 2020 for compatibility issue (with 3.4.1 only).
+    self._file_desc_by_toplevel_extension = {}
+    self._top_enum_values = {}
+    # We store extensions in two two-level mappings: The first key is the
+    # descriptor of the message being extended, the second key is the extension
+    # full name or its tag number.
+    self._extensions_by_name = collections.defaultdict(dict)
+    self._extensions_by_number = collections.defaultdict(dict)
+
+  def _CheckConflictRegister(self, desc, desc_name, file_name):
+    """Check if the descriptor name conflicts with another of the same name.
+
+    Args:
+      desc: Descriptor of a message, enum, service, extension or enum value.
+      desc_name (str): the full name of desc.
+      file_name (str): The file name of descriptor.
+    """
+    for register, descriptor_type in [
+        (self._descriptors, descriptor.Descriptor),
+        (self._enum_descriptors, descriptor.EnumDescriptor),
+        (self._service_descriptors, descriptor.ServiceDescriptor),
+        (self._toplevel_extensions, descriptor.FieldDescriptor),
+        (self._top_enum_values, descriptor.EnumValueDescriptor)]:
+      if desc_name in register:
+        old_desc = register[desc_name]
+        if isinstance(old_desc, descriptor.EnumValueDescriptor):
+          old_file = old_desc.type.file.name
+        else:
+          old_file = old_desc.file.name
+
+        if not isinstance(desc, descriptor_type) or (
+            old_file != file_name):
+          error_msg = ('Conflict register for file "' + file_name +
+                       '": ' + desc_name +
+                       ' is already defined in file "' +
+                       old_file + '". Please fix the conflict by adding '
+                       'package name on the proto file, or use different '
+                       'name for the duplication.')
+          if isinstance(desc, descriptor.EnumValueDescriptor):
+            error_msg += ('\nNote: enum values appear as '
+                          'siblings of the enum type instead of '
+                          'children of it.')
+
+          raise TypeError(error_msg)
+
+        return
+
+  def Add(self, file_desc_proto):
+    """Adds the FileDescriptorProto and its types to this pool.
+
+    Args:
+      file_desc_proto (FileDescriptorProto): The file descriptor to add.
+    """
+
+    self._internal_db.Add(file_desc_proto)
+
+  def AddSerializedFile(self, serialized_file_desc_proto):
+    """Adds the FileDescriptorProto and its types to this pool.
+
+    Args:
+      serialized_file_desc_proto (bytes): A bytes string, serialization of the
+        :class:`FileDescriptorProto` to add.
+    """
+
+    # pylint: disable=g-import-not-at-top
+    from google.protobuf import descriptor_pb2
+    file_desc_proto = descriptor_pb2.FileDescriptorProto.FromString(
+        serialized_file_desc_proto)
+    self.Add(file_desc_proto)
+
+  # Add Descriptor to descriptor pool is dreprecated. Please use Add()
+  # or AddSerializedFile() to add a FileDescriptorProto instead.
+  @_Deprecated
+  def AddDescriptor(self, desc):
+    self._AddDescriptor(desc)
+
+  # Never call this method. It is for internal usage only.
+  def _AddDescriptor(self, desc):
+    """Adds a Descriptor to the pool, non-recursively.
+
+    If the Descriptor contains nested messages or enums, the caller must
+    explicitly register them. This method also registers the FileDescriptor
+    associated with the message.
+
+    Args:
+      desc: A Descriptor.
+    """
+    if not isinstance(desc, descriptor.Descriptor):
+      raise TypeError('Expected instance of descriptor.Descriptor.')
+
+    self._CheckConflictRegister(desc, desc.full_name, desc.file.name)
+
+    self._descriptors[desc.full_name] = desc
+    self._AddFileDescriptor(desc.file)
+
+  # Add EnumDescriptor to descriptor pool is dreprecated. Please use Add()
+  # or AddSerializedFile() to add a FileDescriptorProto instead.
+  @_Deprecated
+  def AddEnumDescriptor(self, enum_desc):
+    self._AddEnumDescriptor(enum_desc)
+
+  # Never call this method. It is for internal usage only.
+  def _AddEnumDescriptor(self, enum_desc):
+    """Adds an EnumDescriptor to the pool.
+
+    This method also registers the FileDescriptor associated with the enum.
+
+    Args:
+      enum_desc: An EnumDescriptor.
+    """
+
+    if not isinstance(enum_desc, descriptor.EnumDescriptor):
+      raise TypeError('Expected instance of descriptor.EnumDescriptor.')
+
+    file_name = enum_desc.file.name
+    self._CheckConflictRegister(enum_desc, enum_desc.full_name, file_name)
+    self._enum_descriptors[enum_desc.full_name] = enum_desc
+
+    # Top enum values need to be indexed.
+    # Count the number of dots to see whether the enum is toplevel or nested
+    # in a message. We cannot use enum_desc.containing_type at this stage.
+    if enum_desc.file.package:
+      top_level = (enum_desc.full_name.count('.')
+                   - enum_desc.file.package.count('.') == 1)
+    else:
+      top_level = enum_desc.full_name.count('.') == 0
+    if top_level:
+      file_name = enum_desc.file.name
+      package = enum_desc.file.package
+      for enum_value in enum_desc.values:
+        full_name = _NormalizeFullyQualifiedName(
+            '.'.join((package, enum_value.name)))
+        self._CheckConflictRegister(enum_value, full_name, file_name)
+        self._top_enum_values[full_name] = enum_value
+    self._AddFileDescriptor(enum_desc.file)
+
+  # Add ServiceDescriptor to descriptor pool is dreprecated. Please use Add()
+  # or AddSerializedFile() to add a FileDescriptorProto instead.
+  @_Deprecated
+  def AddServiceDescriptor(self, service_desc):
+    self._AddServiceDescriptor(service_desc)
+
+  # Never call this method. It is for internal usage only.
+  def _AddServiceDescriptor(self, service_desc):
+    """Adds a ServiceDescriptor to the pool.
+
+    Args:
+      service_desc: A ServiceDescriptor.
+    """
+
+    if not isinstance(service_desc, descriptor.ServiceDescriptor):
+      raise TypeError('Expected instance of descriptor.ServiceDescriptor.')
+
+    self._CheckConflictRegister(service_desc, service_desc.full_name,
+                                service_desc.file.name)
+    self._service_descriptors[service_desc.full_name] = service_desc
+
+  # Add ExtensionDescriptor to descriptor pool is dreprecated. Please use Add()
+  # or AddSerializedFile() to add a FileDescriptorProto instead.
+  @_Deprecated
+  def AddExtensionDescriptor(self, extension):
+    self._AddExtensionDescriptor(extension)
+
+  # Never call this method. It is for internal usage only.
+  def _AddExtensionDescriptor(self, extension):
+    """Adds a FieldDescriptor describing an extension to the pool.
+
+    Args:
+      extension: A FieldDescriptor.
+
+    Raises:
+      AssertionError: when another extension with the same number extends the
+        same message.
+      TypeError: when the specified extension is not a
+        descriptor.FieldDescriptor.
+    """
+    if not (isinstance(extension, descriptor.FieldDescriptor) and
+            extension.is_extension):
+      raise TypeError('Expected an extension descriptor.')
+
+    if extension.extension_scope is None:
+      self._toplevel_extensions[extension.full_name] = extension
+
+    try:
+      existing_desc = self._extensions_by_number[
+          extension.containing_type][extension.number]
+    except KeyError:
+      pass
+    else:
+      if extension is not existing_desc:
+        raise AssertionError(
+            'Extensions "%s" and "%s" both try to extend message type "%s" '
+            'with field number %d.' %
+            (extension.full_name, existing_desc.full_name,
+             extension.containing_type.full_name, extension.number))
+
+    self._extensions_by_number[extension.containing_type][
+        extension.number] = extension
+    self._extensions_by_name[extension.containing_type][
+        extension.full_name] = extension
+
+    # Also register MessageSet extensions with the type name.
+    if _IsMessageSetExtension(extension):
+      self._extensions_by_name[extension.containing_type][
+          extension.message_type.full_name] = extension
+
+  @_Deprecated
+  def AddFileDescriptor(self, file_desc):
+    self._InternalAddFileDescriptor(file_desc)
+
+  # Never call this method. It is for internal usage only.
+  def _InternalAddFileDescriptor(self, file_desc):
+    """Adds a FileDescriptor to the pool, non-recursively.
+
+    If the FileDescriptor contains messages or enums, the caller must explicitly
+    register them.
+
+    Args:
+      file_desc: A FileDescriptor.
+    """
+
+    self._AddFileDescriptor(file_desc)
+    # TODO(jieluo): This is a temporary solution for FieldDescriptor.file.
+    # FieldDescriptor.file is added in code gen. Remove this solution after
+    # maybe 2020 for compatibility reason (with 3.4.1 only).
+    for extension in file_desc.extensions_by_name.values():
+      self._file_desc_by_toplevel_extension[
+          extension.full_name] = file_desc
+
+  def _AddFileDescriptor(self, file_desc):
+    """Adds a FileDescriptor to the pool, non-recursively.
+
+    If the FileDescriptor contains messages or enums, the caller must explicitly
+    register them.
+
+    Args:
+      file_desc: A FileDescriptor.
+    """
+
+    if not isinstance(file_desc, descriptor.FileDescriptor):
+      raise TypeError('Expected instance of descriptor.FileDescriptor.')
+    self._file_descriptors[file_desc.name] = file_desc
+
+  def FindFileByName(self, file_name):
+    """Gets a FileDescriptor by file name.
+
+    Args:
+      file_name (str): The path to the file to get a descriptor for.
+
+    Returns:
+      FileDescriptor: The descriptor for the named file.
+
+    Raises:
+      KeyError: if the file cannot be found in the pool.
+    """
+
+    try:
+      return self._file_descriptors[file_name]
+    except KeyError:
+      pass
+
+    try:
+      file_proto = self._internal_db.FindFileByName(file_name)
+    except KeyError as error:
+      if self._descriptor_db:
+        file_proto = self._descriptor_db.FindFileByName(file_name)
+      else:
+        raise error
+    if not file_proto:
+      raise KeyError('Cannot find a file named %s' % file_name)
+    return self._ConvertFileProtoToFileDescriptor(file_proto)
+
+  def FindFileContainingSymbol(self, symbol):
+    """Gets the FileDescriptor for the file containing the specified symbol.
+
+    Args:
+      symbol (str): The name of the symbol to search for.
+
+    Returns:
+      FileDescriptor: Descriptor for the file that contains the specified
+      symbol.
+
+    Raises:
+      KeyError: if the file cannot be found in the pool.
+    """
+
+    symbol = _NormalizeFullyQualifiedName(symbol)
+    try:
+      return self._InternalFindFileContainingSymbol(symbol)
+    except KeyError:
+      pass
+
+    try:
+      # Try fallback database. Build and find again if possible.
+      self._FindFileContainingSymbolInDb(symbol)
+      return self._InternalFindFileContainingSymbol(symbol)
+    except KeyError:
+      raise KeyError('Cannot find a file containing %s' % symbol)
+
+  def _InternalFindFileContainingSymbol(self, symbol):
+    """Gets the already built FileDescriptor containing the specified symbol.
+
+    Args:
+      symbol (str): The name of the symbol to search for.
+
+    Returns:
+      FileDescriptor: Descriptor for the file that contains the specified
+      symbol.
+
+    Raises:
+      KeyError: if the file cannot be found in the pool.
+    """
+    try:
+      return self._descriptors[symbol].file
+    except KeyError:
+      pass
+
+    try:
+      return self._enum_descriptors[symbol].file
+    except KeyError:
+      pass
+
+    try:
+      return self._service_descriptors[symbol].file
+    except KeyError:
+      pass
+
+    try:
+      return self._top_enum_values[symbol].type.file
+    except KeyError:
+      pass
+
+    try:
+      return self._file_desc_by_toplevel_extension[symbol]
+    except KeyError:
+      pass
+
+    # Try fields, enum values and nested extensions inside a message.
+    top_name, _, sub_name = symbol.rpartition('.')
+    try:
+      message = self.FindMessageTypeByName(top_name)
+      assert (sub_name in message.extensions_by_name or
+              sub_name in message.fields_by_name or
+              sub_name in message.enum_values_by_name)
+      return message.file
+    except (KeyError, AssertionError):
+      raise KeyError('Cannot find a file containing %s' % symbol)
+
+  def FindMessageTypeByName(self, full_name):
+    """Loads the named descriptor from the pool.
+
+    Args:
+      full_name (str): The full name of the descriptor to load.
+
+    Returns:
+      Descriptor: The descriptor for the named type.
+
+    Raises:
+      KeyError: if the message cannot be found in the pool.
+    """
+
+    full_name = _NormalizeFullyQualifiedName(full_name)
+    if full_name not in self._descriptors:
+      self._FindFileContainingSymbolInDb(full_name)
+    return self._descriptors[full_name]
+
+  def FindEnumTypeByName(self, full_name):
+    """Loads the named enum descriptor from the pool.
+
+    Args:
+      full_name (str): The full name of the enum descriptor to load.
+
+    Returns:
+      EnumDescriptor: The enum descriptor for the named type.
+
+    Raises:
+      KeyError: if the enum cannot be found in the pool.
+    """
+
+    full_name = _NormalizeFullyQualifiedName(full_name)
+    if full_name not in self._enum_descriptors:
+      self._FindFileContainingSymbolInDb(full_name)
+    return self._enum_descriptors[full_name]
+
+  def FindFieldByName(self, full_name):
+    """Loads the named field descriptor from the pool.
+
+    Args:
+      full_name (str): The full name of the field descriptor to load.
+
+    Returns:
+      FieldDescriptor: The field descriptor for the named field.
+
+    Raises:
+      KeyError: if the field cannot be found in the pool.
+    """
+    full_name = _NormalizeFullyQualifiedName(full_name)
+    message_name, _, field_name = full_name.rpartition('.')
+    message_descriptor = self.FindMessageTypeByName(message_name)
+    return message_descriptor.fields_by_name[field_name]
+
+  def FindOneofByName(self, full_name):
+    """Loads the named oneof descriptor from the pool.
+
+    Args:
+      full_name (str): The full name of the oneof descriptor to load.
+
+    Returns:
+      OneofDescriptor: The oneof descriptor for the named oneof.
+
+    Raises:
+      KeyError: if the oneof cannot be found in the pool.
+    """
+    full_name = _NormalizeFullyQualifiedName(full_name)
+    message_name, _, oneof_name = full_name.rpartition('.')
+    message_descriptor = self.FindMessageTypeByName(message_name)
+    return message_descriptor.oneofs_by_name[oneof_name]
+
+  def FindExtensionByName(self, full_name):
+    """Loads the named extension descriptor from the pool.
+
+    Args:
+      full_name (str): The full name of the extension descriptor to load.
+
+    Returns:
+      FieldDescriptor: The field descriptor for the named extension.
+
+    Raises:
+      KeyError: if the extension cannot be found in the pool.
+    """
+    full_name = _NormalizeFullyQualifiedName(full_name)
+    try:
+      # The proto compiler does not give any link between the FileDescriptor
+      # and top-level extensions unless the FileDescriptorProto is added to
+      # the DescriptorDatabase, but this can impact memory usage.
+      # So we registered these extensions by name explicitly.
+      return self._toplevel_extensions[full_name]
+    except KeyError:
+      pass
+    message_name, _, extension_name = full_name.rpartition('.')
+    try:
+      # Most extensions are nested inside a message.
+      scope = self.FindMessageTypeByName(message_name)
+    except KeyError:
+      # Some extensions are defined at file scope.
+      scope = self._FindFileContainingSymbolInDb(full_name)
+    return scope.extensions_by_name[extension_name]
+
+  def FindExtensionByNumber(self, message_descriptor, number):
+    """Gets the extension of the specified message with the specified number.
+
+    Extensions have to be registered to this pool by calling :func:`Add` or
+    :func:`AddExtensionDescriptor`.
+
+    Args:
+      message_descriptor (Descriptor): descriptor of the extended message.
+      number (int): Number of the extension field.
+
+    Returns:
+      FieldDescriptor: The descriptor for the extension.
+
+    Raises:
+      KeyError: when no extension with the given number is known for the
+        specified message.
+    """
+    try:
+      return self._extensions_by_number[message_descriptor][number]
+    except KeyError:
+      self._TryLoadExtensionFromDB(message_descriptor, number)
+      return self._extensions_by_number[message_descriptor][number]
+
+  def FindAllExtensions(self, message_descriptor):
+    """Gets all the known extensions of a given message.
+
+    Extensions have to be registered to this pool by build related
+    :func:`Add` or :func:`AddExtensionDescriptor`.
+
+    Args:
+      message_descriptor (Descriptor): Descriptor of the extended message.
+
+    Returns:
+      list[FieldDescriptor]: Field descriptors describing the extensions.
+    """
+    # Fallback to descriptor db if FindAllExtensionNumbers is provided.
+    if self._descriptor_db and hasattr(
+        self._descriptor_db, 'FindAllExtensionNumbers'):
+      full_name = message_descriptor.full_name
+      all_numbers = self._descriptor_db.FindAllExtensionNumbers(full_name)
+      for number in all_numbers:
+        if number in self._extensions_by_number[message_descriptor]:
+          continue
+        self._TryLoadExtensionFromDB(message_descriptor, number)
+
+    return list(self._extensions_by_number[message_descriptor].values())
+
+  def _TryLoadExtensionFromDB(self, message_descriptor, number):
+    """Try to Load extensions from descriptor db.
+
+    Args:
+      message_descriptor: descriptor of the extended message.
+      number: the extension number that needs to be loaded.
+    """
+    if not self._descriptor_db:
+      return
+    # Only supported when FindFileContainingExtension is provided.
+    if not hasattr(
+        self._descriptor_db, 'FindFileContainingExtension'):
+      return
+
+    full_name = message_descriptor.full_name
+    file_proto = self._descriptor_db.FindFileContainingExtension(
+        full_name, number)
+
+    if file_proto is None:
+      return
+
+    try:
+      self._ConvertFileProtoToFileDescriptor(file_proto)
+    except:
+      warn_msg = ('Unable to load proto file %s for extension number %d.' %
+                  (file_proto.name, number))
+      warnings.warn(warn_msg, RuntimeWarning)
+
+  def FindServiceByName(self, full_name):
+    """Loads the named service descriptor from the pool.
+
+    Args:
+      full_name (str): The full name of the service descriptor to load.
+
+    Returns:
+      ServiceDescriptor: The service descriptor for the named service.
+
+    Raises:
+      KeyError: if the service cannot be found in the pool.
+    """
+    full_name = _NormalizeFullyQualifiedName(full_name)
+    if full_name not in self._service_descriptors:
+      self._FindFileContainingSymbolInDb(full_name)
+    return self._service_descriptors[full_name]
+
+  def FindMethodByName(self, full_name):
+    """Loads the named service method descriptor from the pool.
+
+    Args:
+      full_name (str): The full name of the method descriptor to load.
+
+    Returns:
+      MethodDescriptor: The method descriptor for the service method.
+
+    Raises:
+      KeyError: if the method cannot be found in the pool.
+    """
+    full_name = _NormalizeFullyQualifiedName(full_name)
+    service_name, _, method_name = full_name.rpartition('.')
+    service_descriptor = self.FindServiceByName(service_name)
+    return service_descriptor.methods_by_name[method_name]
+
+  def _FindFileContainingSymbolInDb(self, symbol):
+    """Finds the file in descriptor DB containing the specified symbol.
+
+    Args:
+      symbol (str): The name of the symbol to search for.
+
+    Returns:
+      FileDescriptor: The file that contains the specified symbol.
+
+    Raises:
+      KeyError: if the file cannot be found in the descriptor database.
+    """
+    try:
+      file_proto = self._internal_db.FindFileContainingSymbol(symbol)
+    except KeyError as error:
+      if self._descriptor_db:
+        file_proto = self._descriptor_db.FindFileContainingSymbol(symbol)
+      else:
+        raise error
+    if not file_proto:
+      raise KeyError('Cannot find a file containing %s' % symbol)
+    return self._ConvertFileProtoToFileDescriptor(file_proto)
+
+  def _ConvertFileProtoToFileDescriptor(self, file_proto):
+    """Creates a FileDescriptor from a proto or returns a cached copy.
+
+    This method also has the side effect of loading all the symbols found in
+    the file into the appropriate dictionaries in the pool.
+
+    Args:
+      file_proto: The proto to convert.
+
+    Returns:
+      A FileDescriptor matching the passed in proto.
+    """
+    if file_proto.name not in self._file_descriptors:
+      built_deps = list(self._GetDeps(file_proto.dependency))
+      direct_deps = [self.FindFileByName(n) for n in file_proto.dependency]
+      public_deps = [direct_deps[i] for i in file_proto.public_dependency]
+
+      file_descriptor = descriptor.FileDescriptor(
+          pool=self,
+          name=file_proto.name,
+          package=file_proto.package,
+          syntax=file_proto.syntax,
+          options=_OptionsOrNone(file_proto),
+          serialized_pb=file_proto.SerializeToString(),
+          dependencies=direct_deps,
+          public_dependencies=public_deps,
+          # pylint: disable=protected-access
+          create_key=descriptor._internal_create_key)
+      scope = {}
+
+      # This loop extracts all the message and enum types from all the
+      # dependencies of the file_proto. This is necessary to create the
+      # scope of available message types when defining the passed in
+      # file proto.
+      for dependency in built_deps:
+        scope.update(self._ExtractSymbols(
+            dependency.message_types_by_name.values()))
+        scope.update((_PrefixWithDot(enum.full_name), enum)
+                     for enum in dependency.enum_types_by_name.values())
+
+      for message_type in file_proto.message_type:
+        message_desc = self._ConvertMessageDescriptor(
+            message_type, file_proto.package, file_descriptor, scope,
+            file_proto.syntax)
+        file_descriptor.message_types_by_name[message_desc.name] = (
+            message_desc)
+
+      for enum_type in file_proto.enum_type:
+        file_descriptor.enum_types_by_name[enum_type.name] = (
+            self._ConvertEnumDescriptor(enum_type, file_proto.package,
+                                        file_descriptor, None, scope, True))
+
+      for index, extension_proto in enumerate(file_proto.extension):
+        extension_desc = self._MakeFieldDescriptor(
+            extension_proto, file_proto.package, index, file_descriptor,
+            is_extension=True)
+        extension_desc.containing_type = self._GetTypeFromScope(
+            file_descriptor.package, extension_proto.extendee, scope)
+        self._SetFieldType(extension_proto, extension_desc,
+                           file_descriptor.package, scope)
+        file_descriptor.extensions_by_name[extension_desc.name] = (
+            extension_desc)
+        self._file_desc_by_toplevel_extension[extension_desc.full_name] = (
+            file_descriptor)
+
+      for desc_proto in file_proto.message_type:
+        self._SetAllFieldTypes(file_proto.package, desc_proto, scope)
+
+      if file_proto.package:
+        desc_proto_prefix = _PrefixWithDot(file_proto.package)
+      else:
+        desc_proto_prefix = ''
+
+      for desc_proto in file_proto.message_type:
+        desc = self._GetTypeFromScope(
+            desc_proto_prefix, desc_proto.name, scope)
+        file_descriptor.message_types_by_name[desc_proto.name] = desc
+
+      for index, service_proto in enumerate(file_proto.service):
+        file_descriptor.services_by_name[service_proto.name] = (
+            self._MakeServiceDescriptor(service_proto, index, scope,
+                                        file_proto.package, file_descriptor))
+
+      self.Add(file_proto)
+      self._file_descriptors[file_proto.name] = file_descriptor
+
+    # Add extensions to the pool
+    file_desc = self._file_descriptors[file_proto.name]
+    for extension in file_desc.extensions_by_name.values():
+      self._AddExtensionDescriptor(extension)
+    for message_type in file_desc.message_types_by_name.values():
+      for extension in message_type.extensions:
+        self._AddExtensionDescriptor(extension)
+
+    return file_desc
+
+  def _ConvertMessageDescriptor(self, desc_proto, package=None, file_desc=None,
+                                scope=None, syntax=None):
+    """Adds the proto to the pool in the specified package.
+
+    Args:
+      desc_proto: The descriptor_pb2.DescriptorProto protobuf message.
+      package: The package the proto should be located in.
+      file_desc: The file containing this message.
+      scope: Dict mapping short and full symbols to message and enum types.
+      syntax: string indicating syntax of the file ("proto2" or "proto3")
+
+    Returns:
+      The added descriptor.
+    """
+
+    if package:
+      desc_name = '.'.join((package, desc_proto.name))
+    else:
+      desc_name = desc_proto.name
+
+    if file_desc is None:
+      file_name = None
+    else:
+      file_name = file_desc.name
+
+    if scope is None:
+      scope = {}
+
+    nested = [
+        self._ConvertMessageDescriptor(
+            nested, desc_name, file_desc, scope, syntax)
+        for nested in desc_proto.nested_type]
+    enums = [
+        self._ConvertEnumDescriptor(enum, desc_name, file_desc, None,
+                                    scope, False)
+        for enum in desc_proto.enum_type]
+    fields = [self._MakeFieldDescriptor(field, desc_name, index, file_desc)
+              for index, field in enumerate(desc_proto.field)]
+    extensions = [
+        self._MakeFieldDescriptor(extension, desc_name, index, file_desc,
+                                  is_extension=True)
+        for index, extension in enumerate(desc_proto.extension)]
+    oneofs = [
+        # pylint: disable=g-complex-comprehension
+        descriptor.OneofDescriptor(desc.name, '.'.join((desc_name, desc.name)),
+                                   index, None, [], desc.options,
+                                   # pylint: disable=protected-access
+                                   create_key=descriptor._internal_create_key)
+        for index, desc in enumerate(desc_proto.oneof_decl)]
+    extension_ranges = [(r.start, r.end) for r in desc_proto.extension_range]
+    if extension_ranges:
+      is_extendable = True
+    else:
+      is_extendable = False
+    desc = descriptor.Descriptor(
+        name=desc_proto.name,
+        full_name=desc_name,
+        filename=file_name,
+        containing_type=None,
+        fields=fields,
+        oneofs=oneofs,
+        nested_types=nested,
+        enum_types=enums,
+        extensions=extensions,
+        options=_OptionsOrNone(desc_proto),
+        is_extendable=is_extendable,
+        extension_ranges=extension_ranges,
+        file=file_desc,
+        serialized_start=None,
+        serialized_end=None,
+        syntax=syntax,
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+    for nested in desc.nested_types:
+      nested.containing_type = desc
+    for enum in desc.enum_types:
+      enum.containing_type = desc
+    for field_index, field_desc in enumerate(desc_proto.field):
+      if field_desc.HasField('oneof_index'):
+        oneof_index = field_desc.oneof_index
+        oneofs[oneof_index].fields.append(fields[field_index])
+        fields[field_index].containing_oneof = oneofs[oneof_index]
+
+    scope[_PrefixWithDot(desc_name)] = desc
+    self._CheckConflictRegister(desc, desc.full_name, desc.file.name)
+    self._descriptors[desc_name] = desc
+    return desc
+
+  def _ConvertEnumDescriptor(self, enum_proto, package=None, file_desc=None,
+                             containing_type=None, scope=None, top_level=False):
+    """Make a protobuf EnumDescriptor given an EnumDescriptorProto protobuf.
+
+    Args:
+      enum_proto: The descriptor_pb2.EnumDescriptorProto protobuf message.
+      package: Optional package name for the new message EnumDescriptor.
+      file_desc: The file containing the enum descriptor.
+      containing_type: The type containing this enum.
+      scope: Scope containing available types.
+      top_level: If True, the enum is a top level symbol. If False, the enum
+          is defined inside a message.
+
+    Returns:
+      The added descriptor
+    """
+
+    if package:
+      enum_name = '.'.join((package, enum_proto.name))
+    else:
+      enum_name = enum_proto.name
+
+    if file_desc is None:
+      file_name = None
+    else:
+      file_name = file_desc.name
+
+    values = [self._MakeEnumValueDescriptor(value, index)
+              for index, value in enumerate(enum_proto.value)]
+    desc = descriptor.EnumDescriptor(name=enum_proto.name,
+                                     full_name=enum_name,
+                                     filename=file_name,
+                                     file=file_desc,
+                                     values=values,
+                                     containing_type=containing_type,
+                                     options=_OptionsOrNone(enum_proto),
+                                     # pylint: disable=protected-access
+                                     create_key=descriptor._internal_create_key)
+    scope['.%s' % enum_name] = desc
+    self._CheckConflictRegister(desc, desc.full_name, desc.file.name)
+    self._enum_descriptors[enum_name] = desc
+
+    # Add top level enum values.
+    if top_level:
+      for value in values:
+        full_name = _NormalizeFullyQualifiedName(
+            '.'.join((package, value.name)))
+        self._CheckConflictRegister(value, full_name, file_name)
+        self._top_enum_values[full_name] = value
+
+    return desc
+
+  def _MakeFieldDescriptor(self, field_proto, message_name, index,
+                           file_desc, is_extension=False):
+    """Creates a field descriptor from a FieldDescriptorProto.
+
+    For message and enum type fields, this method will do a look up
+    in the pool for the appropriate descriptor for that type. If it
+    is unavailable, it will fall back to the _source function to
+    create it. If this type is still unavailable, construction will
+    fail.
+
+    Args:
+      field_proto: The proto describing the field.
+      message_name: The name of the containing message.
+      index: Index of the field
+      file_desc: The file containing the field descriptor.
+      is_extension: Indication that this field is for an extension.
+
+    Returns:
+      An initialized FieldDescriptor object
+    """
+
+    if message_name:
+      full_name = '.'.join((message_name, field_proto.name))
+    else:
+      full_name = field_proto.name
+
+    return descriptor.FieldDescriptor(
+        name=field_proto.name,
+        full_name=full_name,
+        index=index,
+        number=field_proto.number,
+        type=field_proto.type,
+        cpp_type=None,
+        message_type=None,
+        enum_type=None,
+        containing_type=None,
+        label=field_proto.label,
+        has_default_value=False,
+        default_value=None,
+        is_extension=is_extension,
+        extension_scope=None,
+        options=_OptionsOrNone(field_proto),
+        file=file_desc,
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+
+  def _SetAllFieldTypes(self, package, desc_proto, scope):
+    """Sets all the descriptor's fields's types.
+
+    This method also sets the containing types on any extensions.
+
+    Args:
+      package: The current package of desc_proto.
+      desc_proto: The message descriptor to update.
+      scope: Enclosing scope of available types.
+    """
+
+    package = _PrefixWithDot(package)
+
+    main_desc = self._GetTypeFromScope(package, desc_proto.name, scope)
+
+    if package == '.':
+      nested_package = _PrefixWithDot(desc_proto.name)
+    else:
+      nested_package = '.'.join([package, desc_proto.name])
+
+    for field_proto, field_desc in zip(desc_proto.field, main_desc.fields):
+      self._SetFieldType(field_proto, field_desc, nested_package, scope)
+
+    for extension_proto, extension_desc in (
+        zip(desc_proto.extension, main_desc.extensions)):
+      extension_desc.containing_type = self._GetTypeFromScope(
+          nested_package, extension_proto.extendee, scope)
+      self._SetFieldType(extension_proto, extension_desc, nested_package, scope)
+
+    for nested_type in desc_proto.nested_type:
+      self._SetAllFieldTypes(nested_package, nested_type, scope)
+
+  def _SetFieldType(self, field_proto, field_desc, package, scope):
+    """Sets the field's type, cpp_type, message_type and enum_type.
+
+    Args:
+      field_proto: Data about the field in proto format.
+      field_desc: The descriptor to modify.
+      package: The package the field's container is in.
+      scope: Enclosing scope of available types.
+    """
+    if field_proto.type_name:
+      desc = self._GetTypeFromScope(package, field_proto.type_name, scope)
+    else:
+      desc = None
+
+    if not field_proto.HasField('type'):
+      if isinstance(desc, descriptor.Descriptor):
+        field_proto.type = descriptor.FieldDescriptor.TYPE_MESSAGE
+      else:
+        field_proto.type = descriptor.FieldDescriptor.TYPE_ENUM
+
+    field_desc.cpp_type = descriptor.FieldDescriptor.ProtoTypeToCppProtoType(
+        field_proto.type)
+
+    if (field_proto.type == descriptor.FieldDescriptor.TYPE_MESSAGE
+        or field_proto.type == descriptor.FieldDescriptor.TYPE_GROUP):
+      field_desc.message_type = desc
+
+    if field_proto.type == descriptor.FieldDescriptor.TYPE_ENUM:
+      field_desc.enum_type = desc
+
+    if field_proto.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+      field_desc.has_default_value = False
+      field_desc.default_value = []
+    elif field_proto.HasField('default_value'):
+      field_desc.has_default_value = True
+      if (field_proto.type == descriptor.FieldDescriptor.TYPE_DOUBLE or
+          field_proto.type == descriptor.FieldDescriptor.TYPE_FLOAT):
+        field_desc.default_value = float(field_proto.default_value)
+      elif field_proto.type == descriptor.FieldDescriptor.TYPE_STRING:
+        field_desc.default_value = field_proto.default_value
+      elif field_proto.type == descriptor.FieldDescriptor.TYPE_BOOL:
+        field_desc.default_value = field_proto.default_value.lower() == 'true'
+      elif field_proto.type == descriptor.FieldDescriptor.TYPE_ENUM:
+        field_desc.default_value = field_desc.enum_type.values_by_name[
+            field_proto.default_value].number
+      elif field_proto.type == descriptor.FieldDescriptor.TYPE_BYTES:
+        field_desc.default_value = text_encoding.CUnescape(
+            field_proto.default_value)
+      elif field_proto.type == descriptor.FieldDescriptor.TYPE_MESSAGE:
+        field_desc.default_value = None
+      else:
+        # All other types are of the "int" type.
+        field_desc.default_value = int(field_proto.default_value)
+    else:
+      field_desc.has_default_value = False
+      if (field_proto.type == descriptor.FieldDescriptor.TYPE_DOUBLE or
+          field_proto.type == descriptor.FieldDescriptor.TYPE_FLOAT):
+        field_desc.default_value = 0.0
+      elif field_proto.type == descriptor.FieldDescriptor.TYPE_STRING:
+        field_desc.default_value = u''
+      elif field_proto.type == descriptor.FieldDescriptor.TYPE_BOOL:
+        field_desc.default_value = False
+      elif field_proto.type == descriptor.FieldDescriptor.TYPE_ENUM:
+        field_desc.default_value = field_desc.enum_type.values[0].number
+      elif field_proto.type == descriptor.FieldDescriptor.TYPE_BYTES:
+        field_desc.default_value = b''
+      elif field_proto.type == descriptor.FieldDescriptor.TYPE_MESSAGE:
+        field_desc.default_value = None
+      else:
+        # All other types are of the "int" type.
+        field_desc.default_value = 0
+
+    field_desc.type = field_proto.type
+
+  def _MakeEnumValueDescriptor(self, value_proto, index):
+    """Creates a enum value descriptor object from a enum value proto.
+
+    Args:
+      value_proto: The proto describing the enum value.
+      index: The index of the enum value.
+
+    Returns:
+      An initialized EnumValueDescriptor object.
+    """
+
+    return descriptor.EnumValueDescriptor(
+        name=value_proto.name,
+        index=index,
+        number=value_proto.number,
+        options=_OptionsOrNone(value_proto),
+        type=None,
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+
+  def _MakeServiceDescriptor(self, service_proto, service_index, scope,
+                             package, file_desc):
+    """Make a protobuf ServiceDescriptor given a ServiceDescriptorProto.
+
+    Args:
+      service_proto: The descriptor_pb2.ServiceDescriptorProto protobuf message.
+      service_index: The index of the service in the File.
+      scope: Dict mapping short and full symbols to message and enum types.
+      package: Optional package name for the new message EnumDescriptor.
+      file_desc: The file containing the service descriptor.
+
+    Returns:
+      The added descriptor.
+    """
+
+    if package:
+      service_name = '.'.join((package, service_proto.name))
+    else:
+      service_name = service_proto.name
+
+    methods = [self._MakeMethodDescriptor(method_proto, service_name, package,
+                                          scope, index)
+               for index, method_proto in enumerate(service_proto.method)]
+    desc = descriptor.ServiceDescriptor(
+        name=service_proto.name,
+        full_name=service_name,
+        index=service_index,
+        methods=methods,
+        options=_OptionsOrNone(service_proto),
+        file=file_desc,
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+    self._CheckConflictRegister(desc, desc.full_name, desc.file.name)
+    self._service_descriptors[service_name] = desc
+    return desc
+
+  def _MakeMethodDescriptor(self, method_proto, service_name, package, scope,
+                            index):
+    """Creates a method descriptor from a MethodDescriptorProto.
+
+    Args:
+      method_proto: The proto describing the method.
+      service_name: The name of the containing service.
+      package: Optional package name to look up for types.
+      scope: Scope containing available types.
+      index: Index of the method in the service.
+
+    Returns:
+      An initialized MethodDescriptor object.
+    """
+    full_name = '.'.join((service_name, method_proto.name))
+    input_type = self._GetTypeFromScope(
+        package, method_proto.input_type, scope)
+    output_type = self._GetTypeFromScope(
+        package, method_proto.output_type, scope)
+    return descriptor.MethodDescriptor(
+        name=method_proto.name,
+        full_name=full_name,
+        index=index,
+        containing_service=None,
+        input_type=input_type,
+        output_type=output_type,
+        options=_OptionsOrNone(method_proto),
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+
+  def _ExtractSymbols(self, descriptors):
+    """Pulls out all the symbols from descriptor protos.
+
+    Args:
+      descriptors: The messages to extract descriptors from.
+    Yields:
+      A two element tuple of the type name and descriptor object.
+    """
+
+    for desc in descriptors:
+      yield (_PrefixWithDot(desc.full_name), desc)
+      for symbol in self._ExtractSymbols(desc.nested_types):
+        yield symbol
+      for enum in desc.enum_types:
+        yield (_PrefixWithDot(enum.full_name), enum)
+
+  def _GetDeps(self, dependencies):
+    """Recursively finds dependencies for file protos.
+
+    Args:
+      dependencies: The names of the files being depended on.
+
+    Yields:
+      Each direct and indirect dependency.
+    """
+
+    for dependency in dependencies:
+      dep_desc = self.FindFileByName(dependency)
+      yield dep_desc
+      for parent_dep in dep_desc.dependencies:
+        yield parent_dep
+
+  def _GetTypeFromScope(self, package, type_name, scope):
+    """Finds a given type name in the current scope.
+
+    Args:
+      package: The package the proto should be located in.
+      type_name: The name of the type to be found in the scope.
+      scope: Dict mapping short and full symbols to message and enum types.
+
+    Returns:
+      The descriptor for the requested type.
+    """
+    if type_name not in scope:
+      components = _PrefixWithDot(package).split('.')
+      while components:
+        possible_match = '.'.join(components + [type_name])
+        if possible_match in scope:
+          type_name = possible_match
+          break
+        else:
+          components.pop(-1)
+    return scope[type_name]
+
+
+def _PrefixWithDot(name):
+  return name if name.startswith('.') else '.%s' % name
+
+
+if _USE_C_DESCRIPTORS:
+  # TODO(amauryfa): This pool could be constructed from Python code, when we
+  # support a flag like 'use_cpp_generated_pool=True'.
+  # pylint: disable=protected-access
+  _DEFAULT = descriptor._message.default_pool
+else:
+  _DEFAULT = DescriptorPool()
+
+
+def Default():
+  return _DEFAULT
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/duration_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/duration_pb2.py
new file mode 100644
index 0000000..d5fba22
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/duration_pb2.py
@@ -0,0 +1,78 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/duration.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/duration.proto',
+  package='google.protobuf',
+  syntax='proto3',
+  serialized_options=b'\n\023com.google.protobufB\rDurationProtoP\001Z*github.com/golang/protobuf/ptypes/duration\370\001\001\242\002\003GPB\252\002\036Google.Protobuf.WellKnownTypes',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\x1egoogle/protobuf/duration.proto\x12\x0fgoogle.protobuf\"*\n\x08\x44uration\x12\x0f\n\x07seconds\x18\x01 \x01(\x03\x12\r\n\x05nanos\x18\x02 \x01(\x05\x42|\n\x13\x63om.google.protobufB\rDurationProtoP\x01Z*github.com/golang/protobuf/ptypes/duration\xf8\x01\x01\xa2\x02\x03GPB\xaa\x02\x1eGoogle.Protobuf.WellKnownTypesb\x06proto3'
+)
+
+
+
+
+_DURATION = _descriptor.Descriptor(
+  name='Duration',
+  full_name='google.protobuf.Duration',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='seconds', full_name='google.protobuf.Duration.seconds', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nanos', full_name='google.protobuf.Duration.nanos', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=51,
+  serialized_end=93,
+)
+
+DESCRIPTOR.message_types_by_name['Duration'] = _DURATION
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Duration = _reflection.GeneratedProtocolMessageType('Duration', (_message.Message,), {
+  'DESCRIPTOR' : _DURATION,
+  '__module__' : 'google.protobuf.duration_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Duration)
+  })
+_sym_db.RegisterMessage(Duration)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/empty_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/empty_pb2.py
new file mode 100644
index 0000000..e5cec93
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/empty_pb2.py
@@ -0,0 +1,64 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/empty.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/empty.proto',
+  package='google.protobuf',
+  syntax='proto3',
+  serialized_options=b'\n\023com.google.protobufB\nEmptyProtoP\001Z\'github.com/golang/protobuf/ptypes/empty\370\001\001\242\002\003GPB\252\002\036Google.Protobuf.WellKnownTypes',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\x1bgoogle/protobuf/empty.proto\x12\x0fgoogle.protobuf\"\x07\n\x05\x45mptyBv\n\x13\x63om.google.protobufB\nEmptyProtoP\x01Z\'github.com/golang/protobuf/ptypes/empty\xf8\x01\x01\xa2\x02\x03GPB\xaa\x02\x1eGoogle.Protobuf.WellKnownTypesb\x06proto3'
+)
+
+
+
+
+_EMPTY = _descriptor.Descriptor(
+  name='Empty',
+  full_name='google.protobuf.Empty',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=48,
+  serialized_end=55,
+)
+
+DESCRIPTOR.message_types_by_name['Empty'] = _EMPTY
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Empty = _reflection.GeneratedProtocolMessageType('Empty', (_message.Message,), {
+  'DESCRIPTOR' : _EMPTY,
+  '__module__' : 'google.protobuf.empty_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Empty)
+  })
+_sym_db.RegisterMessage(Empty)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/field_mask_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/field_mask_pb2.py
new file mode 100644
index 0000000..e07128d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/field_mask_pb2.py
@@ -0,0 +1,71 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/field_mask.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/field_mask.proto',
+  package='google.protobuf',
+  syntax='proto3',
+  serialized_options=b'\n\023com.google.protobufB\016FieldMaskProtoP\001Z9google.golang.org/genproto/protobuf/field_mask;field_mask\370\001\001\242\002\003GPB\252\002\036Google.Protobuf.WellKnownTypes',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n google/protobuf/field_mask.proto\x12\x0fgoogle.protobuf\"\x1a\n\tFieldMask\x12\r\n\x05paths\x18\x01 \x03(\tB\x8c\x01\n\x13\x63om.google.protobufB\x0e\x46ieldMaskProtoP\x01Z9google.golang.org/genproto/protobuf/field_mask;field_mask\xf8\x01\x01\xa2\x02\x03GPB\xaa\x02\x1eGoogle.Protobuf.WellKnownTypesb\x06proto3'
+)
+
+
+
+
+_FIELDMASK = _descriptor.Descriptor(
+  name='FieldMask',
+  full_name='google.protobuf.FieldMask',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='paths', full_name='google.protobuf.FieldMask.paths', index=0,
+      number=1, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=53,
+  serialized_end=79,
+)
+
+DESCRIPTOR.message_types_by_name['FieldMask'] = _FIELDMASK
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+FieldMask = _reflection.GeneratedProtocolMessageType('FieldMask', (_message.Message,), {
+  'DESCRIPTOR' : _FIELDMASK,
+  '__module__' : 'google.protobuf.field_mask_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.FieldMask)
+  })
+_sym_db.RegisterMessage(FieldMask)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/__init__.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/__init__.py
new file mode 100644
index 0000000..7d2e571
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/__init__.py
@@ -0,0 +1,30 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
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diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/_parameterized.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/_parameterized.py
new file mode 100644
index 0000000..4cba1d4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/_parameterized.py
@@ -0,0 +1,449 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Adds support for parameterized tests to Python's unittest TestCase class.
+
+A parameterized test is a method in a test case that is invoked with different
+argument tuples.
+
+A simple example:
+
+  class AdditionExample(parameterized.TestCase):
+    @parameterized.parameters(
+       (1, 2, 3),
+       (4, 5, 9),
+       (1, 1, 3))
+    def testAddition(self, op1, op2, result):
+      self.assertEqual(result, op1 + op2)
+
+
+Each invocation is a separate test case and properly isolated just
+like a normal test method, with its own setUp/tearDown cycle. In the
+example above, there are three separate testcases, one of which will
+fail due to an assertion error (1 + 1 != 3).
+
+Parameters for individual test cases can be tuples (with positional parameters)
+or dictionaries (with named parameters):
+
+  class AdditionExample(parameterized.TestCase):
+    @parameterized.parameters(
+       {'op1': 1, 'op2': 2, 'result': 3},
+       {'op1': 4, 'op2': 5, 'result': 9},
+    )
+    def testAddition(self, op1, op2, result):
+      self.assertEqual(result, op1 + op2)
+
+If a parameterized test fails, the error message will show the
+original test name (which is modified internally) and the arguments
+for the specific invocation, which are part of the string returned by
+the shortDescription() method on test cases.
+
+The id method of the test, used internally by the unittest framework,
+is also modified to show the arguments. To make sure that test names
+stay the same across several invocations, object representations like
+
+  >>> class Foo(object):
+  ...  pass
+  >>> repr(Foo())
+  '<__main__.Foo object at 0x23d8610>'
+
+are turned into '<__main__.Foo>'. For even more descriptive names,
+especially in test logs, you can use the named_parameters decorator. In
+this case, only tuples are supported, and the first parameters has to
+be a string (or an object that returns an apt name when converted via
+str()):
+
+  class NamedExample(parameterized.TestCase):
+    @parameterized.named_parameters(
+       ('Normal', 'aa', 'aaa', True),
+       ('EmptyPrefix', '', 'abc', True),
+       ('BothEmpty', '', '', True))
+    def testStartsWith(self, prefix, string, result):
+      self.assertEqual(result, strings.startswith(prefix))
+
+Named tests also have the benefit that they can be run individually
+from the command line:
+
+  $ testmodule.py NamedExample.testStartsWithNormal
+  .
+  --------------------------------------------------------------------
+  Ran 1 test in 0.000s
+
+  OK
+
+Parameterized Classes
+=====================
+If invocation arguments are shared across test methods in a single
+TestCase class, instead of decorating all test methods
+individually, the class itself can be decorated:
+
+  @parameterized.parameters(
+    (1, 2, 3)
+    (4, 5, 9))
+  class ArithmeticTest(parameterized.TestCase):
+    def testAdd(self, arg1, arg2, result):
+      self.assertEqual(arg1 + arg2, result)
+
+    def testSubtract(self, arg2, arg2, result):
+      self.assertEqual(result - arg1, arg2)
+
+Inputs from Iterables
+=====================
+If parameters should be shared across several test cases, or are dynamically
+created from other sources, a single non-tuple iterable can be passed into
+the decorator. This iterable will be used to obtain the test cases:
+
+  class AdditionExample(parameterized.TestCase):
+    @parameterized.parameters(
+      c.op1, c.op2, c.result for c in testcases
+    )
+    def testAddition(self, op1, op2, result):
+      self.assertEqual(result, op1 + op2)
+
+
+Single-Argument Test Methods
+============================
+If a test method takes only one argument, the single argument does not need to
+be wrapped into a tuple:
+
+  class NegativeNumberExample(parameterized.TestCase):
+    @parameterized.parameters(
+       -1, -3, -4, -5
+    )
+    def testIsNegative(self, arg):
+      self.assertTrue(IsNegative(arg))
+"""
+
+__author__ = 'tmarek@google.com (Torsten Marek)'
+
+import functools
+import re
+import types
+try:
+  import unittest2 as unittest
+except ImportError:
+  import unittest
+import uuid
+
+import six
+
+try:
+  # Since python 3
+  import collections.abc as collections_abc
+except ImportError:
+  # Won't work after python 3.8
+  import collections as collections_abc
+
+ADDR_RE = re.compile(r'\<([a-zA-Z0-9_\-\.]+) object at 0x[a-fA-F0-9]+\>')
+_SEPARATOR = uuid.uuid1().hex
+_FIRST_ARG = object()
+_ARGUMENT_REPR = object()
+
+
+def _CleanRepr(obj):
+  return ADDR_RE.sub(r'<\1>', repr(obj))
+
+
+# Helper function formerly from the unittest module, removed from it in
+# Python 2.7.
+def _StrClass(cls):
+  return '%s.%s' % (cls.__module__, cls.__name__)
+
+
+def _NonStringIterable(obj):
+  return (isinstance(obj, collections_abc.Iterable) and not
+          isinstance(obj, six.string_types))
+
+
+def _FormatParameterList(testcase_params):
+  if isinstance(testcase_params, collections_abc.Mapping):
+    return ', '.join('%s=%s' % (argname, _CleanRepr(value))
+                     for argname, value in testcase_params.items())
+  elif _NonStringIterable(testcase_params):
+    return ', '.join(map(_CleanRepr, testcase_params))
+  else:
+    return _FormatParameterList((testcase_params,))
+
+
+class _ParameterizedTestIter(object):
+  """Callable and iterable class for producing new test cases."""
+
+  def __init__(self, test_method, testcases, naming_type):
+    """Returns concrete test functions for a test and a list of parameters.
+
+    The naming_type is used to determine the name of the concrete
+    functions as reported by the unittest framework. If naming_type is
+    _FIRST_ARG, the testcases must be tuples, and the first element must
+    have a string representation that is a valid Python identifier.
+
+    Args:
+      test_method: The decorated test method.
+      testcases: (list of tuple/dict) A list of parameter
+                 tuples/dicts for individual test invocations.
+      naming_type: The test naming type, either _NAMED or _ARGUMENT_REPR.
+    """
+    self._test_method = test_method
+    self.testcases = testcases
+    self._naming_type = naming_type
+
+  def __call__(self, *args, **kwargs):
+    raise RuntimeError('You appear to be running a parameterized test case '
+                       'without having inherited from parameterized.'
+                       'TestCase. This is bad because none of '
+                       'your test cases are actually being run.')
+
+  def __iter__(self):
+    test_method = self._test_method
+    naming_type = self._naming_type
+
+    def MakeBoundParamTest(testcase_params):
+      @functools.wraps(test_method)
+      def BoundParamTest(self):
+        if isinstance(testcase_params, collections_abc.Mapping):
+          test_method(self, **testcase_params)
+        elif _NonStringIterable(testcase_params):
+          test_method(self, *testcase_params)
+        else:
+          test_method(self, testcase_params)
+
+      if naming_type is _FIRST_ARG:
+        # Signal the metaclass that the name of the test function is unique
+        # and descriptive.
+        BoundParamTest.__x_use_name__ = True
+        BoundParamTest.__name__ += str(testcase_params[0])
+        testcase_params = testcase_params[1:]
+      elif naming_type is _ARGUMENT_REPR:
+        # __x_extra_id__ is used to pass naming information to the __new__
+        # method of TestGeneratorMetaclass.
+        # The metaclass will make sure to create a unique, but nondescriptive
+        # name for this test.
+        BoundParamTest.__x_extra_id__ = '(%s)' % (
+            _FormatParameterList(testcase_params),)
+      else:
+        raise RuntimeError('%s is not a valid naming type.' % (naming_type,))
+
+      BoundParamTest.__doc__ = '%s(%s)' % (
+          BoundParamTest.__name__, _FormatParameterList(testcase_params))
+      if test_method.__doc__:
+        BoundParamTest.__doc__ += '\n%s' % (test_method.__doc__,)
+      return BoundParamTest
+    return (MakeBoundParamTest(c) for c in self.testcases)
+
+
+def _IsSingletonList(testcases):
+  """True iff testcases contains only a single non-tuple element."""
+  return len(testcases) == 1 and not isinstance(testcases[0], tuple)
+
+
+def _ModifyClass(class_object, testcases, naming_type):
+  assert not getattr(class_object, '_id_suffix', None), (
+      'Cannot add parameters to %s,'
+      ' which already has parameterized methods.' % (class_object,))
+  class_object._id_suffix = id_suffix = {}
+  # We change the size of __dict__ while we iterate over it,
+  # which Python 3.x will complain about, so use copy().
+  for name, obj in class_object.__dict__.copy().items():
+    if (name.startswith(unittest.TestLoader.testMethodPrefix)
+        and isinstance(obj, types.FunctionType)):
+      delattr(class_object, name)
+      methods = {}
+      _UpdateClassDictForParamTestCase(
+          methods, id_suffix, name,
+          _ParameterizedTestIter(obj, testcases, naming_type))
+      for name, meth in methods.items():
+        setattr(class_object, name, meth)
+
+
+def _ParameterDecorator(naming_type, testcases):
+  """Implementation of the parameterization decorators.
+
+  Args:
+    naming_type: The naming type.
+    testcases: Testcase parameters.
+
+  Returns:
+    A function for modifying the decorated object.
+  """
+  def _Apply(obj):
+    if isinstance(obj, type):
+      _ModifyClass(
+          obj,
+          list(testcases) if not isinstance(testcases, collections_abc.Sequence)
+          else testcases,
+          naming_type)
+      return obj
+    else:
+      return _ParameterizedTestIter(obj, testcases, naming_type)
+
+  if _IsSingletonList(testcases):
+    assert _NonStringIterable(testcases[0]), (
+        'Single parameter argument must be a non-string iterable')
+    testcases = testcases[0]
+
+  return _Apply
+
+
+def parameters(*testcases):  # pylint: disable=invalid-name
+  """A decorator for creating parameterized tests.
+
+  See the module docstring for a usage example.
+  Args:
+    *testcases: Parameters for the decorated method, either a single
+                iterable, or a list of tuples/dicts/objects (for tests
+                with only one argument).
+
+  Returns:
+     A test generator to be handled by TestGeneratorMetaclass.
+  """
+  return _ParameterDecorator(_ARGUMENT_REPR, testcases)
+
+
+def named_parameters(*testcases):  # pylint: disable=invalid-name
+  """A decorator for creating parameterized tests.
+
+  See the module docstring for a usage example. The first element of
+  each parameter tuple should be a string and will be appended to the
+  name of the test method.
+
+  Args:
+    *testcases: Parameters for the decorated method, either a single
+                iterable, or a list of tuples.
+
+  Returns:
+     A test generator to be handled by TestGeneratorMetaclass.
+  """
+  return _ParameterDecorator(_FIRST_ARG, testcases)
+
+
+class TestGeneratorMetaclass(type):
+  """Metaclass for test cases with test generators.
+
+  A test generator is an iterable in a testcase that produces callables. These
+  callables must be single-argument methods. These methods are injected into
+  the class namespace and the original iterable is removed. If the name of the
+  iterable conforms to the test pattern, the injected methods will be picked
+  up as tests by the unittest framework.
+
+  In general, it is supposed to be used in conjunction with the
+  parameters decorator.
+  """
+
+  def __new__(mcs, class_name, bases, dct):
+    dct['_id_suffix'] = id_suffix = {}
+    for name, obj in dct.items():
+      if (name.startswith(unittest.TestLoader.testMethodPrefix) and
+          _NonStringIterable(obj)):
+        iterator = iter(obj)
+        dct.pop(name)
+        _UpdateClassDictForParamTestCase(dct, id_suffix, name, iterator)
+
+    return type.__new__(mcs, class_name, bases, dct)
+
+
+def _UpdateClassDictForParamTestCase(dct, id_suffix, name, iterator):
+  """Adds individual test cases to a dictionary.
+
+  Args:
+    dct: The target dictionary.
+    id_suffix: The dictionary for mapping names to test IDs.
+    name: The original name of the test case.
+    iterator: The iterator generating the individual test cases.
+  """
+  for idx, func in enumerate(iterator):
+    assert callable(func), 'Test generators must yield callables, got %r' % (
+        func,)
+    if getattr(func, '__x_use_name__', False):
+      new_name = func.__name__
+    else:
+      new_name = '%s%s%d' % (name, _SEPARATOR, idx)
+    assert new_name not in dct, (
+        'Name of parameterized test case "%s" not unique' % (new_name,))
+    dct[new_name] = func
+    id_suffix[new_name] = getattr(func, '__x_extra_id__', '')
+
+
+class TestCase(unittest.TestCase):
+  """Base class for test cases using the parameters decorator."""
+  __metaclass__ = TestGeneratorMetaclass
+
+  def _OriginalName(self):
+    return self._testMethodName.split(_SEPARATOR)[0]
+
+  def __str__(self):
+    return '%s (%s)' % (self._OriginalName(), _StrClass(self.__class__))
+
+  def id(self):  # pylint: disable=invalid-name
+    """Returns the descriptive ID of the test.
+
+    This is used internally by the unittesting framework to get a name
+    for the test to be used in reports.
+
+    Returns:
+      The test id.
+    """
+    return '%s.%s%s' % (_StrClass(self.__class__),
+                        self._OriginalName(),
+                        self._id_suffix.get(self._testMethodName, ''))
+
+
+def CoopTestCase(other_base_class):
+  """Returns a new base class with a cooperative metaclass base.
+
+  This enables the TestCase to be used in combination
+  with other base classes that have custom metaclasses, such as
+  mox.MoxTestBase.
+
+  Only works with metaclasses that do not override type.__new__.
+
+  Example:
+
+    import google3
+    import mox
+
+    from google3.testing.pybase import parameterized
+
+    class ExampleTest(parameterized.CoopTestCase(mox.MoxTestBase)):
+      ...
+
+  Args:
+    other_base_class: (class) A test case base class.
+
+  Returns:
+    A new class object.
+  """
+  metaclass = type(
+      'CoopMetaclass',
+      (other_base_class.__metaclass__,
+       TestGeneratorMetaclass), {})
+  return metaclass(
+      'CoopTestCase',
+      (other_base_class, TestCase), {})
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/any_test_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/any_test_pb2.py
new file mode 100644
index 0000000..2b026e9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/any_test_pb2.py
@@ -0,0 +1,185 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/any_test.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import any_pb2 as google_dot_protobuf_dot_any__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/any_test.proto',
+  package='google.protobuf.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\'google/protobuf/internal/any_test.proto\x12\x18google.protobuf.internal\x1a\x19google/protobuf/any.proto\"\xc0\x01\n\x07TestAny\x12#\n\x05value\x18\x01 \x01(\x0b\x32\x14.google.protobuf.Any\x12\x11\n\tint_value\x18\x02 \x01(\x05\x12\x42\n\tmap_value\x18\x03 \x03(\x0b\x32/.google.protobuf.internal.TestAny.MapValueEntry\x1a/\n\rMapValueEntry\x12\x0b\n\x03key\x18\x01 \x01(\t\x12\r\n\x05value\x18\x02 \x01(\x05:\x02\x38\x01*\x08\x08\n\x10\x80\x80\x80\x80\x02\"\x85\x01\n\x11TestAnyExtension1\x12\t\n\x01i\x18\x0f \x01(\x05\x32\x65\n\nextension1\x12!.google.protobuf.internal.TestAny\x18\xab\xff\xf6. \x01(\x0b\x32+.google.protobuf.internal.TestAnyExtension1'
+  ,
+  dependencies=[google_dot_protobuf_dot_any__pb2.DESCRIPTOR,])
+
+
+
+
+_TESTANY_MAPVALUEENTRY = _descriptor.Descriptor(
+  name='MapValueEntry',
+  full_name='google.protobuf.internal.TestAny.MapValueEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='google.protobuf.internal.TestAny.MapValueEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.internal.TestAny.MapValueEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=232,
+  serialized_end=279,
+)
+
+_TESTANY = _descriptor.Descriptor(
+  name='TestAny',
+  full_name='google.protobuf.internal.TestAny',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.internal.TestAny.value', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='int_value', full_name='google.protobuf.internal.TestAny.int_value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_value', full_name='google.protobuf.internal.TestAny.map_value', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTANY_MAPVALUEENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(10, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=97,
+  serialized_end=289,
+)
+
+
+_TESTANYEXTENSION1 = _descriptor.Descriptor(
+  name='TestAnyExtension1',
+  full_name='google.protobuf.internal.TestAnyExtension1',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='i', full_name='google.protobuf.internal.TestAnyExtension1.i', index=0,
+      number=15, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='extension1', full_name='google.protobuf.internal.TestAnyExtension1.extension1', index=0,
+      number=98418603, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=292,
+  serialized_end=425,
+)
+
+_TESTANY_MAPVALUEENTRY.containing_type = _TESTANY
+_TESTANY.fields_by_name['value'].message_type = google_dot_protobuf_dot_any__pb2._ANY
+_TESTANY.fields_by_name['map_value'].message_type = _TESTANY_MAPVALUEENTRY
+DESCRIPTOR.message_types_by_name['TestAny'] = _TESTANY
+DESCRIPTOR.message_types_by_name['TestAnyExtension1'] = _TESTANYEXTENSION1
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestAny = _reflection.GeneratedProtocolMessageType('TestAny', (_message.Message,), {
+
+  'MapValueEntry' : _reflection.GeneratedProtocolMessageType('MapValueEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTANY_MAPVALUEENTRY,
+    '__module__' : 'google.protobuf.internal.any_test_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.TestAny.MapValueEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTANY,
+  '__module__' : 'google.protobuf.internal.any_test_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.TestAny)
+  })
+_sym_db.RegisterMessage(TestAny)
+_sym_db.RegisterMessage(TestAny.MapValueEntry)
+
+TestAnyExtension1 = _reflection.GeneratedProtocolMessageType('TestAnyExtension1', (_message.Message,), {
+  'DESCRIPTOR' : _TESTANYEXTENSION1,
+  '__module__' : 'google.protobuf.internal.any_test_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.TestAnyExtension1)
+  })
+_sym_db.RegisterMessage(TestAnyExtension1)
+
+_TESTANYEXTENSION1.extensions_by_name['extension1'].message_type = _TESTANYEXTENSION1
+TestAny.RegisterExtension(_TESTANYEXTENSION1.extensions_by_name['extension1'])
+
+_TESTANY_MAPVALUEENTRY._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/api_implementation.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/api_implementation.py
new file mode 100644
index 0000000..e8448e8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/api_implementation.py
@@ -0,0 +1,153 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Determine which implementation of the protobuf API is used in this process.
+"""
+
+import os
+import warnings
+import sys
+
+try:
+  # pylint: disable=g-import-not-at-top
+  from google.protobuf.internal import _api_implementation
+  # The compile-time constants in the _api_implementation module can be used to
+  # switch to a certain implementation of the Python API at build time.
+  _api_version = _api_implementation.api_version
+  _proto_extension_modules_exist_in_build = True
+except ImportError:
+  _api_version = -1  # Unspecified by compiler flags.
+  _proto_extension_modules_exist_in_build = False
+
+if _api_version == 1:
+  raise ValueError('api_version=1 is no longer supported.')
+if _api_version < 0:  # Still unspecified?
+  try:
+    # The presence of this module in a build allows the proto implementation to
+    # be upgraded merely via build deps rather than a compiler flag or the
+    # runtime environment variable.
+    # pylint: disable=g-import-not-at-top
+    from google.protobuf import _use_fast_cpp_protos
+    # Work around a known issue in the classic bootstrap .par import hook.
+    if not _use_fast_cpp_protos:
+      raise ImportError('_use_fast_cpp_protos import succeeded but was None')
+    del _use_fast_cpp_protos
+    _api_version = 2
+  except ImportError:
+    try:
+      # pylint: disable=g-import-not-at-top
+      from google.protobuf.internal import use_pure_python
+      del use_pure_python  # Avoids a pylint error and namespace pollution.
+    except ImportError:
+      # TODO(b/74017912): It's unsafe to enable :use_fast_cpp_protos by default;
+      # it can cause data loss if you have any Python-only extensions to any
+      # message passed back and forth with C++ code.
+      #
+      # TODO(b/17427486): Once that bug is fixed, we want to make both Python 2
+      # and Python 3 default to `_api_version = 2` (C++ implementation V2).
+      pass
+
+_default_implementation_type = (
+    'python' if _api_version <= 0 else 'cpp')
+
+# This environment variable can be used to switch to a certain implementation
+# of the Python API, overriding the compile-time constants in the
+# _api_implementation module. Right now only 'python' and 'cpp' are valid
+# values. Any other value will be ignored.
+_implementation_type = os.getenv('PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION',
+                                 _default_implementation_type)
+
+if _implementation_type != 'python':
+  _implementation_type = 'cpp'
+
+if 'PyPy' in sys.version and _implementation_type == 'cpp':
+  warnings.warn('PyPy does not work yet with cpp protocol buffers. '
+                'Falling back to the python implementation.')
+  _implementation_type = 'python'
+
+# This environment variable can be used to switch between the two
+# 'cpp' implementations, overriding the compile-time constants in the
+# _api_implementation module. Right now only '2' is supported. Any other
+# value will cause an error to be raised.
+_implementation_version_str = os.getenv(
+    'PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION_VERSION', '2')
+
+if _implementation_version_str != '2':
+  raise ValueError(
+      'unsupported PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION_VERSION: "' +
+      _implementation_version_str + '" (supported versions: 2)'
+      )
+
+_implementation_version = int(_implementation_version_str)
+
+
+# Detect if serialization should be deterministic by default
+try:
+  # The presence of this module in a build allows the proto implementation to
+  # be upgraded merely via build deps.
+  #
+  # NOTE: Merely importing this automatically enables deterministic proto
+  # serialization for C++ code, but we still need to export it as a boolean so
+  # that we can do the same for `_implementation_type == 'python'`.
+  #
+  # NOTE2: It is possible for C++ code to enable deterministic serialization by
+  # default _without_ affecting Python code, if the C++ implementation is not in
+  # use by this module.  That is intended behavior, so we don't actually expose
+  # this boolean outside of this module.
+  #
+  # pylint: disable=g-import-not-at-top,unused-import
+  from google.protobuf import enable_deterministic_proto_serialization
+  _python_deterministic_proto_serialization = True
+except ImportError:
+  _python_deterministic_proto_serialization = False
+
+
+# Usage of this function is discouraged. Clients shouldn't care which
+# implementation of the API is in use. Note that there is no guarantee
+# that differences between APIs will be maintained.
+# Please don't use this function if possible.
+def Type():
+  return _implementation_type
+
+
+def _SetType(implementation_type):
+  """Never use! Only for protobuf benchmark."""
+  global _implementation_type
+  _implementation_type = implementation_type
+
+
+# See comment on 'Type' above.
+def Version():
+  return _implementation_version
+
+
+# For internal use only
+def IsPythonDefaultSerializationDeterministic():
+  return _python_deterministic_proto_serialization
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/containers.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/containers.py
new file mode 100644
index 0000000..ecd28ee
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/containers.py
@@ -0,0 +1,781 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Contains container classes to represent different protocol buffer types.
+
+This file defines container classes which represent categories of protocol
+buffer field types which need extra maintenance. Currently these categories
+are:
+
+-   Repeated scalar fields - These are all repeated fields which aren't
+    composite (e.g. they are of simple types like int32, string, etc).
+-   Repeated composite fields - Repeated fields which are composite. This
+    includes groups and nested messages.
+"""
+
+__author__ = 'petar@google.com (Petar Petrov)'
+
+import sys
+try:
+  # This fallback applies for all versions of Python before 3.3
+  import collections.abc as collections_abc
+except ImportError:
+  import collections as collections_abc
+
+if sys.version_info[0] < 3:
+  # We would use collections_abc.MutableMapping all the time, but in Python 2
+  # it doesn't define __slots__.  This causes two significant problems:
+  #
+  # 1. we can't disallow arbitrary attribute assignment, even if our derived
+  #    classes *do* define __slots__.
+  #
+  # 2. we can't safely derive a C type from it without __slots__ defined (the
+  #    interpreter expects to find a dict at tp_dictoffset, which we can't
+  #    robustly provide.  And we don't want an instance dict anyway.
+  #
+  # So this is the Python 2.7 definition of Mapping/MutableMapping functions
+  # verbatim, except that:
+  # 1. We declare __slots__.
+  # 2. We don't declare this as a virtual base class.  The classes defined
+  #    in collections_abc are the interesting base classes, not us.
+  #
+  # Note: deriving from object is critical.  It is the only thing that makes
+  # this a true type, allowing us to derive from it in C++ cleanly and making
+  # __slots__ properly disallow arbitrary element assignment.
+
+  class Mapping(object):
+    __slots__ = ()
+
+    def get(self, key, default=None):
+      try:
+        return self[key]
+      except KeyError:
+        return default
+
+    def __contains__(self, key):
+      try:
+        self[key]
+      except KeyError:
+        return False
+      else:
+        return True
+
+    def iterkeys(self):
+      return iter(self)
+
+    def itervalues(self):
+      for key in self:
+        yield self[key]
+
+    def iteritems(self):
+      for key in self:
+        yield (key, self[key])
+
+    def keys(self):
+      return list(self)
+
+    def items(self):
+      return [(key, self[key]) for key in self]
+
+    def values(self):
+      return [self[key] for key in self]
+
+    # Mappings are not hashable by default, but subclasses can change this
+    __hash__ = None
+
+    def __eq__(self, other):
+      if not isinstance(other, collections_abc.Mapping):
+        return NotImplemented
+      return dict(self.items()) == dict(other.items())
+
+    def __ne__(self, other):
+      return not (self == other)
+
+  class MutableMapping(Mapping):
+    __slots__ = ()
+
+    __marker = object()
+
+    def pop(self, key, default=__marker):
+      try:
+        value = self[key]
+      except KeyError:
+        if default is self.__marker:
+          raise
+        return default
+      else:
+        del self[key]
+        return value
+
+    def popitem(self):
+      try:
+        key = next(iter(self))
+      except StopIteration:
+        raise KeyError
+      value = self[key]
+      del self[key]
+      return key, value
+
+    def clear(self):
+      try:
+        while True:
+          self.popitem()
+      except KeyError:
+        pass
+
+    def update(*args, **kwds):
+      if len(args) > 2:
+        raise TypeError("update() takes at most 2 positional "
+                        "arguments ({} given)".format(len(args)))
+      elif not args:
+        raise TypeError("update() takes at least 1 argument (0 given)")
+      self = args[0]
+      other = args[1] if len(args) >= 2 else ()
+
+      if isinstance(other, Mapping):
+        for key in other:
+          self[key] = other[key]
+      elif hasattr(other, "keys"):
+        for key in other.keys():
+          self[key] = other[key]
+      else:
+        for key, value in other:
+          self[key] = value
+      for key, value in kwds.items():
+        self[key] = value
+
+    def setdefault(self, key, default=None):
+      try:
+        return self[key]
+      except KeyError:
+        self[key] = default
+      return default
+
+  collections_abc.Mapping.register(Mapping)
+  collections_abc.MutableMapping.register(MutableMapping)
+
+else:
+  # In Python 3 we can just use MutableMapping directly, because it defines
+  # __slots__.
+  MutableMapping = collections_abc.MutableMapping
+
+
+class BaseContainer(object):
+
+  """Base container class."""
+
+  # Minimizes memory usage and disallows assignment to other attributes.
+  __slots__ = ['_message_listener', '_values']
+
+  def __init__(self, message_listener):
+    """
+    Args:
+      message_listener: A MessageListener implementation.
+        The RepeatedScalarFieldContainer will call this object's
+        Modified() method when it is modified.
+    """
+    self._message_listener = message_listener
+    self._values = []
+
+  def __getitem__(self, key):
+    """Retrieves item by the specified key."""
+    return self._values[key]
+
+  def __len__(self):
+    """Returns the number of elements in the container."""
+    return len(self._values)
+
+  def __ne__(self, other):
+    """Checks if another instance isn't equal to this one."""
+    # The concrete classes should define __eq__.
+    return not self == other
+
+  def __hash__(self):
+    raise TypeError('unhashable object')
+
+  def __repr__(self):
+    return repr(self._values)
+
+  def sort(self, *args, **kwargs):
+    # Continue to support the old sort_function keyword argument.
+    # This is expected to be a rare occurrence, so use LBYL to avoid
+    # the overhead of actually catching KeyError.
+    if 'sort_function' in kwargs:
+      kwargs['cmp'] = kwargs.pop('sort_function')
+    self._values.sort(*args, **kwargs)
+
+
+collections_abc.MutableSequence.register(BaseContainer)
+
+
+class RepeatedScalarFieldContainer(BaseContainer):
+  """Simple, type-checked, list-like container for holding repeated scalars."""
+
+  # Disallows assignment to other attributes.
+  __slots__ = ['_type_checker']
+
+  def __init__(self, message_listener, type_checker):
+    """Args:
+
+      message_listener: A MessageListener implementation. The
+      RepeatedScalarFieldContainer will call this object's Modified() method
+      when it is modified.
+      type_checker: A type_checkers.ValueChecker instance to run on elements
+      inserted into this container.
+    """
+    super(RepeatedScalarFieldContainer, self).__init__(message_listener)
+    self._type_checker = type_checker
+
+  def append(self, value):
+    """Appends an item to the list. Similar to list.append()."""
+    self._values.append(self._type_checker.CheckValue(value))
+    if not self._message_listener.dirty:
+      self._message_listener.Modified()
+
+  def insert(self, key, value):
+    """Inserts the item at the specified position. Similar to list.insert()."""
+    self._values.insert(key, self._type_checker.CheckValue(value))
+    if not self._message_listener.dirty:
+      self._message_listener.Modified()
+
+  def extend(self, elem_seq):
+    """Extends by appending the given iterable. Similar to list.extend()."""
+
+    if elem_seq is None:
+      return
+    try:
+      elem_seq_iter = iter(elem_seq)
+    except TypeError:
+      if not elem_seq:
+        # silently ignore falsy inputs :-/.
+        # TODO(ptucker): Deprecate this behavior. b/18413862
+        return
+      raise
+
+    new_values = [self._type_checker.CheckValue(elem) for elem in elem_seq_iter]
+    if new_values:
+      self._values.extend(new_values)
+    self._message_listener.Modified()
+
+  def MergeFrom(self, other):
+    """Appends the contents of another repeated field of the same type to this
+    one. We do not check the types of the individual fields.
+    """
+    self._values.extend(other._values)
+    self._message_listener.Modified()
+
+  def remove(self, elem):
+    """Removes an item from the list. Similar to list.remove()."""
+    self._values.remove(elem)
+    self._message_listener.Modified()
+
+  def pop(self, key=-1):
+    """Removes and returns an item at a given index. Similar to list.pop()."""
+    value = self._values[key]
+    self.__delitem__(key)
+    return value
+
+  def __setitem__(self, key, value):
+    """Sets the item on the specified position."""
+    if isinstance(key, slice):  # PY3
+      if key.step is not None:
+        raise ValueError('Extended slices not supported')
+      self.__setslice__(key.start, key.stop, value)
+    else:
+      self._values[key] = self._type_checker.CheckValue(value)
+      self._message_listener.Modified()
+
+  def __getslice__(self, start, stop):
+    """Retrieves the subset of items from between the specified indices."""
+    return self._values[start:stop]
+
+  def __setslice__(self, start, stop, values):
+    """Sets the subset of items from between the specified indices."""
+    new_values = []
+    for value in values:
+      new_values.append(self._type_checker.CheckValue(value))
+    self._values[start:stop] = new_values
+    self._message_listener.Modified()
+
+  def __delitem__(self, key):
+    """Deletes the item at the specified position."""
+    del self._values[key]
+    self._message_listener.Modified()
+
+  def __delslice__(self, start, stop):
+    """Deletes the subset of items from between the specified indices."""
+    del self._values[start:stop]
+    self._message_listener.Modified()
+
+  def __eq__(self, other):
+    """Compares the current instance with another one."""
+    if self is other:
+      return True
+    # Special case for the same type which should be common and fast.
+    if isinstance(other, self.__class__):
+      return other._values == self._values
+    # We are presumably comparing against some other sequence type.
+    return other == self._values
+
+
+class RepeatedCompositeFieldContainer(BaseContainer):
+
+  """Simple, list-like container for holding repeated composite fields."""
+
+  # Disallows assignment to other attributes.
+  __slots__ = ['_message_descriptor']
+
+  def __init__(self, message_listener, message_descriptor):
+    """
+    Note that we pass in a descriptor instead of the generated directly,
+    since at the time we construct a _RepeatedCompositeFieldContainer we
+    haven't yet necessarily initialized the type that will be contained in the
+    container.
+
+    Args:
+      message_listener: A MessageListener implementation.
+        The RepeatedCompositeFieldContainer will call this object's
+        Modified() method when it is modified.
+      message_descriptor: A Descriptor instance describing the protocol type
+        that should be present in this container.  We'll use the
+        _concrete_class field of this descriptor when the client calls add().
+    """
+    super(RepeatedCompositeFieldContainer, self).__init__(message_listener)
+    self._message_descriptor = message_descriptor
+
+  def add(self, **kwargs):
+    """Adds a new element at the end of the list and returns it. Keyword
+    arguments may be used to initialize the element.
+    """
+    new_element = self._message_descriptor._concrete_class(**kwargs)
+    new_element._SetListener(self._message_listener)
+    self._values.append(new_element)
+    if not self._message_listener.dirty:
+      self._message_listener.Modified()
+    return new_element
+
+  def append(self, value):
+    """Appends one element by copying the message."""
+    new_element = self._message_descriptor._concrete_class()
+    new_element._SetListener(self._message_listener)
+    new_element.CopyFrom(value)
+    self._values.append(new_element)
+    if not self._message_listener.dirty:
+      self._message_listener.Modified()
+
+  def insert(self, key, value):
+    """Inserts the item at the specified position by copying."""
+    new_element = self._message_descriptor._concrete_class()
+    new_element._SetListener(self._message_listener)
+    new_element.CopyFrom(value)
+    self._values.insert(key, new_element)
+    if not self._message_listener.dirty:
+      self._message_listener.Modified()
+
+  def extend(self, elem_seq):
+    """Extends by appending the given sequence of elements of the same type
+
+    as this one, copying each individual message.
+    """
+    message_class = self._message_descriptor._concrete_class
+    listener = self._message_listener
+    values = self._values
+    for message in elem_seq:
+      new_element = message_class()
+      new_element._SetListener(listener)
+      new_element.MergeFrom(message)
+      values.append(new_element)
+    listener.Modified()
+
+  def MergeFrom(self, other):
+    """Appends the contents of another repeated field of the same type to this
+    one, copying each individual message.
+    """
+    self.extend(other._values)
+
+  def remove(self, elem):
+    """Removes an item from the list. Similar to list.remove()."""
+    self._values.remove(elem)
+    self._message_listener.Modified()
+
+  def pop(self, key=-1):
+    """Removes and returns an item at a given index. Similar to list.pop()."""
+    value = self._values[key]
+    self.__delitem__(key)
+    return value
+
+  def __getslice__(self, start, stop):
+    """Retrieves the subset of items from between the specified indices."""
+    return self._values[start:stop]
+
+  def __delitem__(self, key):
+    """Deletes the item at the specified position."""
+    del self._values[key]
+    self._message_listener.Modified()
+
+  def __delslice__(self, start, stop):
+    """Deletes the subset of items from between the specified indices."""
+    del self._values[start:stop]
+    self._message_listener.Modified()
+
+  def __eq__(self, other):
+    """Compares the current instance with another one."""
+    if self is other:
+      return True
+    if not isinstance(other, self.__class__):
+      raise TypeError('Can only compare repeated composite fields against '
+                      'other repeated composite fields.')
+    return self._values == other._values
+
+
+class ScalarMap(MutableMapping):
+
+  """Simple, type-checked, dict-like container for holding repeated scalars."""
+
+  # Disallows assignment to other attributes.
+  __slots__ = ['_key_checker', '_value_checker', '_values', '_message_listener',
+               '_entry_descriptor']
+
+  def __init__(self, message_listener, key_checker, value_checker,
+               entry_descriptor):
+    """
+    Args:
+      message_listener: A MessageListener implementation.
+        The ScalarMap will call this object's Modified() method when it
+        is modified.
+      key_checker: A type_checkers.ValueChecker instance to run on keys
+        inserted into this container.
+      value_checker: A type_checkers.ValueChecker instance to run on values
+        inserted into this container.
+      entry_descriptor: The MessageDescriptor of a map entry: key and value.
+    """
+    self._message_listener = message_listener
+    self._key_checker = key_checker
+    self._value_checker = value_checker
+    self._entry_descriptor = entry_descriptor
+    self._values = {}
+
+  def __getitem__(self, key):
+    try:
+      return self._values[key]
+    except KeyError:
+      key = self._key_checker.CheckValue(key)
+      val = self._value_checker.DefaultValue()
+      self._values[key] = val
+      return val
+
+  def __contains__(self, item):
+    # We check the key's type to match the strong-typing flavor of the API.
+    # Also this makes it easier to match the behavior of the C++ implementation.
+    self._key_checker.CheckValue(item)
+    return item in self._values
+
+  # We need to override this explicitly, because our defaultdict-like behavior
+  # will make the default implementation (from our base class) always insert
+  # the key.
+  def get(self, key, default=None):
+    if key in self:
+      return self[key]
+    else:
+      return default
+
+  def __setitem__(self, key, value):
+    checked_key = self._key_checker.CheckValue(key)
+    checked_value = self._value_checker.CheckValue(value)
+    self._values[checked_key] = checked_value
+    self._message_listener.Modified()
+
+  def __delitem__(self, key):
+    del self._values[key]
+    self._message_listener.Modified()
+
+  def __len__(self):
+    return len(self._values)
+
+  def __iter__(self):
+    return iter(self._values)
+
+  def __repr__(self):
+    return repr(self._values)
+
+  def MergeFrom(self, other):
+    self._values.update(other._values)
+    self._message_listener.Modified()
+
+  def InvalidateIterators(self):
+    # It appears that the only way to reliably invalidate iterators to
+    # self._values is to ensure that its size changes.
+    original = self._values
+    self._values = original.copy()
+    original[None] = None
+
+  # This is defined in the abstract base, but we can do it much more cheaply.
+  def clear(self):
+    self._values.clear()
+    self._message_listener.Modified()
+
+  def GetEntryClass(self):
+    return self._entry_descriptor._concrete_class
+
+
+class MessageMap(MutableMapping):
+
+  """Simple, type-checked, dict-like container for with submessage values."""
+
+  # Disallows assignment to other attributes.
+  __slots__ = ['_key_checker', '_values', '_message_listener',
+               '_message_descriptor', '_entry_descriptor']
+
+  def __init__(self, message_listener, message_descriptor, key_checker,
+               entry_descriptor):
+    """
+    Args:
+      message_listener: A MessageListener implementation.
+        The ScalarMap will call this object's Modified() method when it
+        is modified.
+      key_checker: A type_checkers.ValueChecker instance to run on keys
+        inserted into this container.
+      value_checker: A type_checkers.ValueChecker instance to run on values
+        inserted into this container.
+      entry_descriptor: The MessageDescriptor of a map entry: key and value.
+    """
+    self._message_listener = message_listener
+    self._message_descriptor = message_descriptor
+    self._key_checker = key_checker
+    self._entry_descriptor = entry_descriptor
+    self._values = {}
+
+  def __getitem__(self, key):
+    key = self._key_checker.CheckValue(key)
+    try:
+      return self._values[key]
+    except KeyError:
+      new_element = self._message_descriptor._concrete_class()
+      new_element._SetListener(self._message_listener)
+      self._values[key] = new_element
+      self._message_listener.Modified()
+
+      return new_element
+
+  def get_or_create(self, key):
+    """get_or_create() is an alias for getitem (ie. map[key]).
+
+    Args:
+      key: The key to get or create in the map.
+
+    This is useful in cases where you want to be explicit that the call is
+    mutating the map.  This can avoid lint errors for statements like this
+    that otherwise would appear to be pointless statements:
+
+      msg.my_map[key]
+    """
+    return self[key]
+
+  # We need to override this explicitly, because our defaultdict-like behavior
+  # will make the default implementation (from our base class) always insert
+  # the key.
+  def get(self, key, default=None):
+    if key in self:
+      return self[key]
+    else:
+      return default
+
+  def __contains__(self, item):
+    item = self._key_checker.CheckValue(item)
+    return item in self._values
+
+  def __setitem__(self, key, value):
+    raise ValueError('May not set values directly, call my_map[key].foo = 5')
+
+  def __delitem__(self, key):
+    key = self._key_checker.CheckValue(key)
+    del self._values[key]
+    self._message_listener.Modified()
+
+  def __len__(self):
+    return len(self._values)
+
+  def __iter__(self):
+    return iter(self._values)
+
+  def __repr__(self):
+    return repr(self._values)
+
+  def MergeFrom(self, other):
+    for key in other:
+      # According to documentation: "When parsing from the wire or when merging,
+      # if there are duplicate map keys the last key seen is used".
+      if key in self:
+        del self[key]
+      self[key].CopyFrom(other[key])
+    # self._message_listener.Modified() not required here, because
+    # mutations to submessages already propagate.
+
+  def InvalidateIterators(self):
+    # It appears that the only way to reliably invalidate iterators to
+    # self._values is to ensure that its size changes.
+    original = self._values
+    self._values = original.copy()
+    original[None] = None
+
+  # This is defined in the abstract base, but we can do it much more cheaply.
+  def clear(self):
+    self._values.clear()
+    self._message_listener.Modified()
+
+  def GetEntryClass(self):
+    return self._entry_descriptor._concrete_class
+
+
+class _UnknownField(object):
+
+  """A parsed unknown field."""
+
+  # Disallows assignment to other attributes.
+  __slots__ = ['_field_number', '_wire_type', '_data']
+
+  def __init__(self, field_number, wire_type, data):
+    self._field_number = field_number
+    self._wire_type = wire_type
+    self._data = data
+    return
+
+  def __lt__(self, other):
+    # pylint: disable=protected-access
+    return self._field_number < other._field_number
+
+  def __eq__(self, other):
+    if self is other:
+      return True
+    # pylint: disable=protected-access
+    return (self._field_number == other._field_number and
+            self._wire_type == other._wire_type and
+            self._data == other._data)
+
+
+class UnknownFieldRef(object):
+
+  def __init__(self, parent, index):
+    self._parent = parent
+    self._index = index
+    return
+
+  def _check_valid(self):
+    if not self._parent:
+      raise ValueError('UnknownField does not exist. '
+                       'The parent message might be cleared.')
+    if self._index >= len(self._parent):
+      raise ValueError('UnknownField does not exist. '
+                       'The parent message might be cleared.')
+
+  @property
+  def field_number(self):
+    self._check_valid()
+    # pylint: disable=protected-access
+    return self._parent._internal_get(self._index)._field_number
+
+  @property
+  def wire_type(self):
+    self._check_valid()
+    # pylint: disable=protected-access
+    return self._parent._internal_get(self._index)._wire_type
+
+  @property
+  def data(self):
+    self._check_valid()
+    # pylint: disable=protected-access
+    return self._parent._internal_get(self._index)._data
+
+
+class UnknownFieldSet(object):
+
+  """UnknownField container"""
+
+  # Disallows assignment to other attributes.
+  __slots__ = ['_values']
+
+  def __init__(self):
+    self._values = []
+
+  def __getitem__(self, index):
+    if self._values is None:
+      raise ValueError('UnknownFields does not exist. '
+                       'The parent message might be cleared.')
+    size = len(self._values)
+    if index < 0:
+      index += size
+    if index < 0 or index >= size:
+      raise IndexError('index %d out of range'.index)
+
+    return UnknownFieldRef(self, index)
+
+  def _internal_get(self, index):
+    return self._values[index]
+
+  def __len__(self):
+    if self._values is None:
+      raise ValueError('UnknownFields does not exist. '
+                       'The parent message might be cleared.')
+    return len(self._values)
+
+  def _add(self, field_number, wire_type, data):
+    unknown_field = _UnknownField(field_number, wire_type, data)
+    self._values.append(unknown_field)
+    return unknown_field
+
+  def __iter__(self):
+    for i in range(len(self)):
+      yield UnknownFieldRef(self, i)
+
+  def _extend(self, other):
+    if other is None:
+      return
+    # pylint: disable=protected-access
+    self._values.extend(other._values)
+
+  def __eq__(self, other):
+    if self is other:
+      return True
+    # Sort unknown fields because their order shouldn't
+    # affect equality test.
+    values = list(self._values)
+    if other is None:
+      return not values
+    values.sort()
+    # pylint: disable=protected-access
+    other_values = sorted(other._values)
+    return values == other_values
+
+  def _clear(self):
+    for value in self._values:
+      # pylint: disable=protected-access
+      if isinstance(value._data, UnknownFieldSet):
+        value._data._clear()  # pylint: disable=protected-access
+    self._values = None
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/decoder.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/decoder.py
new file mode 100644
index 0000000..6804986
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/decoder.py
@@ -0,0 +1,1057 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Code for decoding protocol buffer primitives.
+
+This code is very similar to encoder.py -- read the docs for that module first.
+
+A "decoder" is a function with the signature:
+  Decode(buffer, pos, end, message, field_dict)
+The arguments are:
+  buffer:     The string containing the encoded message.
+  pos:        The current position in the string.
+  end:        The position in the string where the current message ends.  May be
+              less than len(buffer) if we're reading a sub-message.
+  message:    The message object into which we're parsing.
+  field_dict: message._fields (avoids a hashtable lookup).
+The decoder reads the field and stores it into field_dict, returning the new
+buffer position.  A decoder for a repeated field may proactively decode all of
+the elements of that field, if they appear consecutively.
+
+Note that decoders may throw any of the following:
+  IndexError:  Indicates a truncated message.
+  struct.error:  Unpacking of a fixed-width field failed.
+  message.DecodeError:  Other errors.
+
+Decoders are expected to raise an exception if they are called with pos > end.
+This allows callers to be lax about bounds checking:  it's fineto read past
+"end" as long as you are sure that someone else will notice and throw an
+exception later on.
+
+Something up the call stack is expected to catch IndexError and struct.error
+and convert them to message.DecodeError.
+
+Decoders are constructed using decoder constructors with the signature:
+  MakeDecoder(field_number, is_repeated, is_packed, key, new_default)
+The arguments are:
+  field_number:  The field number of the field we want to decode.
+  is_repeated:   Is the field a repeated field? (bool)
+  is_packed:     Is the field a packed field? (bool)
+  key:           The key to use when looking up the field within field_dict.
+                 (This is actually the FieldDescriptor but nothing in this
+                 file should depend on that.)
+  new_default:   A function which takes a message object as a parameter and
+                 returns a new instance of the default value for this field.
+                 (This is called for repeated fields and sub-messages, when an
+                 instance does not already exist.)
+
+As with encoders, we define a decoder constructor for every type of field.
+Then, for every field of every message class we construct an actual decoder.
+That decoder goes into a dict indexed by tag, so when we decode a message
+we repeatedly read a tag, look up the corresponding decoder, and invoke it.
+"""
+
+__author__ = 'kenton@google.com (Kenton Varda)'
+
+import struct
+import sys
+import six
+
+_UCS2_MAXUNICODE = 65535
+if six.PY3:
+  long = int
+else:
+  import re    # pylint: disable=g-import-not-at-top
+  _SURROGATE_PATTERN = re.compile(six.u(r'[\ud800-\udfff]'))
+
+from google.protobuf.internal import containers
+from google.protobuf.internal import encoder
+from google.protobuf.internal import wire_format
+from google.protobuf import message
+
+
+# This will overflow and thus become IEEE-754 "infinity".  We would use
+# "float('inf')" but it doesn't work on Windows pre-Python-2.6.
+_POS_INF = 1e10000
+_NEG_INF = -_POS_INF
+_NAN = _POS_INF * 0
+
+
+# This is not for optimization, but rather to avoid conflicts with local
+# variables named "message".
+_DecodeError = message.DecodeError
+
+
+def _VarintDecoder(mask, result_type):
+  """Return an encoder for a basic varint value (does not include tag).
+
+  Decoded values will be bitwise-anded with the given mask before being
+  returned, e.g. to limit them to 32 bits.  The returned decoder does not
+  take the usual "end" parameter -- the caller is expected to do bounds checking
+  after the fact (often the caller can defer such checking until later).  The
+  decoder returns a (value, new_pos) pair.
+  """
+
+  def DecodeVarint(buffer, pos):
+    result = 0
+    shift = 0
+    while 1:
+      b = six.indexbytes(buffer, pos)
+      result |= ((b & 0x7f) << shift)
+      pos += 1
+      if not (b & 0x80):
+        result &= mask
+        result = result_type(result)
+        return (result, pos)
+      shift += 7
+      if shift >= 64:
+        raise _DecodeError('Too many bytes when decoding varint.')
+  return DecodeVarint
+
+
+def _SignedVarintDecoder(bits, result_type):
+  """Like _VarintDecoder() but decodes signed values."""
+
+  signbit = 1 << (bits - 1)
+  mask = (1 << bits) - 1
+
+  def DecodeVarint(buffer, pos):
+    result = 0
+    shift = 0
+    while 1:
+      b = six.indexbytes(buffer, pos)
+      result |= ((b & 0x7f) << shift)
+      pos += 1
+      if not (b & 0x80):
+        result &= mask
+        result = (result ^ signbit) - signbit
+        result = result_type(result)
+        return (result, pos)
+      shift += 7
+      if shift >= 64:
+        raise _DecodeError('Too many bytes when decoding varint.')
+  return DecodeVarint
+
+# We force 32-bit values to int and 64-bit values to long to make
+# alternate implementations where the distinction is more significant
+# (e.g. the C++ implementation) simpler.
+
+_DecodeVarint = _VarintDecoder((1 << 64) - 1, long)
+_DecodeSignedVarint = _SignedVarintDecoder(64, long)
+
+# Use these versions for values which must be limited to 32 bits.
+_DecodeVarint32 = _VarintDecoder((1 << 32) - 1, int)
+_DecodeSignedVarint32 = _SignedVarintDecoder(32, int)
+
+
+def ReadTag(buffer, pos):
+  """Read a tag from the memoryview, and return a (tag_bytes, new_pos) tuple.
+
+  We return the raw bytes of the tag rather than decoding them.  The raw
+  bytes can then be used to look up the proper decoder.  This effectively allows
+  us to trade some work that would be done in pure-python (decoding a varint)
+  for work that is done in C (searching for a byte string in a hash table).
+  In a low-level language it would be much cheaper to decode the varint and
+  use that, but not in Python.
+
+  Args:
+    buffer: memoryview object of the encoded bytes
+    pos: int of the current position to start from
+
+  Returns:
+    Tuple[bytes, int] of the tag data and new position.
+  """
+  start = pos
+  while six.indexbytes(buffer, pos) & 0x80:
+    pos += 1
+  pos += 1
+
+  tag_bytes = buffer[start:pos].tobytes()
+  return tag_bytes, pos
+
+
+# --------------------------------------------------------------------
+
+
+def _SimpleDecoder(wire_type, decode_value):
+  """Return a constructor for a decoder for fields of a particular type.
+
+  Args:
+      wire_type:  The field's wire type.
+      decode_value:  A function which decodes an individual value, e.g.
+        _DecodeVarint()
+  """
+
+  def SpecificDecoder(field_number, is_repeated, is_packed, key, new_default,
+                      clear_if_default=False):
+    if is_packed:
+      local_DecodeVarint = _DecodeVarint
+      def DecodePackedField(buffer, pos, end, message, field_dict):
+        value = field_dict.get(key)
+        if value is None:
+          value = field_dict.setdefault(key, new_default(message))
+        (endpoint, pos) = local_DecodeVarint(buffer, pos)
+        endpoint += pos
+        if endpoint > end:
+          raise _DecodeError('Truncated message.')
+        while pos < endpoint:
+          (element, pos) = decode_value(buffer, pos)
+          value.append(element)
+        if pos > endpoint:
+          del value[-1]   # Discard corrupt value.
+          raise _DecodeError('Packed element was truncated.')
+        return pos
+      return DecodePackedField
+    elif is_repeated:
+      tag_bytes = encoder.TagBytes(field_number, wire_type)
+      tag_len = len(tag_bytes)
+      def DecodeRepeatedField(buffer, pos, end, message, field_dict):
+        value = field_dict.get(key)
+        if value is None:
+          value = field_dict.setdefault(key, new_default(message))
+        while 1:
+          (element, new_pos) = decode_value(buffer, pos)
+          value.append(element)
+          # Predict that the next tag is another copy of the same repeated
+          # field.
+          pos = new_pos + tag_len
+          if buffer[new_pos:pos] != tag_bytes or new_pos >= end:
+            # Prediction failed.  Return.
+            if new_pos > end:
+              raise _DecodeError('Truncated message.')
+            return new_pos
+      return DecodeRepeatedField
+    else:
+      def DecodeField(buffer, pos, end, message, field_dict):
+        (new_value, pos) = decode_value(buffer, pos)
+        if pos > end:
+          raise _DecodeError('Truncated message.')
+        if clear_if_default and not new_value:
+          field_dict.pop(key, None)
+        else:
+          field_dict[key] = new_value
+        return pos
+      return DecodeField
+
+  return SpecificDecoder
+
+
+def _ModifiedDecoder(wire_type, decode_value, modify_value):
+  """Like SimpleDecoder but additionally invokes modify_value on every value
+  before storing it.  Usually modify_value is ZigZagDecode.
+  """
+
+  # Reusing _SimpleDecoder is slightly slower than copying a bunch of code, but
+  # not enough to make a significant difference.
+
+  def InnerDecode(buffer, pos):
+    (result, new_pos) = decode_value(buffer, pos)
+    return (modify_value(result), new_pos)
+  return _SimpleDecoder(wire_type, InnerDecode)
+
+
+def _StructPackDecoder(wire_type, format):
+  """Return a constructor for a decoder for a fixed-width field.
+
+  Args:
+      wire_type:  The field's wire type.
+      format:  The format string to pass to struct.unpack().
+  """
+
+  value_size = struct.calcsize(format)
+  local_unpack = struct.unpack
+
+  # Reusing _SimpleDecoder is slightly slower than copying a bunch of code, but
+  # not enough to make a significant difference.
+
+  # Note that we expect someone up-stack to catch struct.error and convert
+  # it to _DecodeError -- this way we don't have to set up exception-
+  # handling blocks every time we parse one value.
+
+  def InnerDecode(buffer, pos):
+    new_pos = pos + value_size
+    result = local_unpack(format, buffer[pos:new_pos])[0]
+    return (result, new_pos)
+  return _SimpleDecoder(wire_type, InnerDecode)
+
+
+def _FloatDecoder():
+  """Returns a decoder for a float field.
+
+  This code works around a bug in struct.unpack for non-finite 32-bit
+  floating-point values.
+  """
+
+  local_unpack = struct.unpack
+
+  def InnerDecode(buffer, pos):
+    """Decode serialized float to a float and new position.
+
+    Args:
+      buffer: memoryview of the serialized bytes
+      pos: int, position in the memory view to start at.
+
+    Returns:
+      Tuple[float, int] of the deserialized float value and new position
+      in the serialized data.
+    """
+    # We expect a 32-bit value in little-endian byte order.  Bit 1 is the sign
+    # bit, bits 2-9 represent the exponent, and bits 10-32 are the significand.
+    new_pos = pos + 4
+    float_bytes = buffer[pos:new_pos].tobytes()
+
+    # If this value has all its exponent bits set, then it's non-finite.
+    # In Python 2.4, struct.unpack will convert it to a finite 64-bit value.
+    # To avoid that, we parse it specially.
+    if (float_bytes[3:4] in b'\x7F\xFF' and float_bytes[2:3] >= b'\x80'):
+      # If at least one significand bit is set...
+      if float_bytes[0:3] != b'\x00\x00\x80':
+        return (_NAN, new_pos)
+      # If sign bit is set...
+      if float_bytes[3:4] == b'\xFF':
+        return (_NEG_INF, new_pos)
+      return (_POS_INF, new_pos)
+
+    # Note that we expect someone up-stack to catch struct.error and convert
+    # it to _DecodeError -- this way we don't have to set up exception-
+    # handling blocks every time we parse one value.
+    result = local_unpack('<f', float_bytes)[0]
+    return (result, new_pos)
+  return _SimpleDecoder(wire_format.WIRETYPE_FIXED32, InnerDecode)
+
+
+def _DoubleDecoder():
+  """Returns a decoder for a double field.
+
+  This code works around a bug in struct.unpack for not-a-number.
+  """
+
+  local_unpack = struct.unpack
+
+  def InnerDecode(buffer, pos):
+    """Decode serialized double to a double and new position.
+
+    Args:
+      buffer: memoryview of the serialized bytes.
+      pos: int, position in the memory view to start at.
+
+    Returns:
+      Tuple[float, int] of the decoded double value and new position
+      in the serialized data.
+    """
+    # We expect a 64-bit value in little-endian byte order.  Bit 1 is the sign
+    # bit, bits 2-12 represent the exponent, and bits 13-64 are the significand.
+    new_pos = pos + 8
+    double_bytes = buffer[pos:new_pos].tobytes()
+
+    # If this value has all its exponent bits set and at least one significand
+    # bit set, it's not a number.  In Python 2.4, struct.unpack will treat it
+    # as inf or -inf.  To avoid that, we treat it specially.
+    if ((double_bytes[7:8] in b'\x7F\xFF')
+        and (double_bytes[6:7] >= b'\xF0')
+        and (double_bytes[0:7] != b'\x00\x00\x00\x00\x00\x00\xF0')):
+      return (_NAN, new_pos)
+
+    # Note that we expect someone up-stack to catch struct.error and convert
+    # it to _DecodeError -- this way we don't have to set up exception-
+    # handling blocks every time we parse one value.
+    result = local_unpack('<d', double_bytes)[0]
+    return (result, new_pos)
+  return _SimpleDecoder(wire_format.WIRETYPE_FIXED64, InnerDecode)
+
+
+def EnumDecoder(field_number, is_repeated, is_packed, key, new_default,
+                clear_if_default=False):
+  """Returns a decoder for enum field."""
+  enum_type = key.enum_type
+  if is_packed:
+    local_DecodeVarint = _DecodeVarint
+    def DecodePackedField(buffer, pos, end, message, field_dict):
+      """Decode serialized packed enum to its value and a new position.
+
+      Args:
+        buffer: memoryview of the serialized bytes.
+        pos: int, position in the memory view to start at.
+        end: int, end position of serialized data
+        message: Message object to store unknown fields in
+        field_dict: Map[Descriptor, Any] to store decoded values in.
+
+      Returns:
+        int, new position in serialized data.
+      """
+      value = field_dict.get(key)
+      if value is None:
+        value = field_dict.setdefault(key, new_default(message))
+      (endpoint, pos) = local_DecodeVarint(buffer, pos)
+      endpoint += pos
+      if endpoint > end:
+        raise _DecodeError('Truncated message.')
+      while pos < endpoint:
+        value_start_pos = pos
+        (element, pos) = _DecodeSignedVarint32(buffer, pos)
+        # pylint: disable=protected-access
+        if element in enum_type.values_by_number:
+          value.append(element)
+        else:
+          if not message._unknown_fields:
+            message._unknown_fields = []
+          tag_bytes = encoder.TagBytes(field_number,
+                                       wire_format.WIRETYPE_VARINT)
+
+          message._unknown_fields.append(
+              (tag_bytes, buffer[value_start_pos:pos].tobytes()))
+          if message._unknown_field_set is None:
+            message._unknown_field_set = containers.UnknownFieldSet()
+          message._unknown_field_set._add(
+              field_number, wire_format.WIRETYPE_VARINT, element)
+          # pylint: enable=protected-access
+      if pos > endpoint:
+        if element in enum_type.values_by_number:
+          del value[-1]   # Discard corrupt value.
+        else:
+          del message._unknown_fields[-1]
+          # pylint: disable=protected-access
+          del message._unknown_field_set._values[-1]
+          # pylint: enable=protected-access
+        raise _DecodeError('Packed element was truncated.')
+      return pos
+    return DecodePackedField
+  elif is_repeated:
+    tag_bytes = encoder.TagBytes(field_number, wire_format.WIRETYPE_VARINT)
+    tag_len = len(tag_bytes)
+    def DecodeRepeatedField(buffer, pos, end, message, field_dict):
+      """Decode serialized repeated enum to its value and a new position.
+
+      Args:
+        buffer: memoryview of the serialized bytes.
+        pos: int, position in the memory view to start at.
+        end: int, end position of serialized data
+        message: Message object to store unknown fields in
+        field_dict: Map[Descriptor, Any] to store decoded values in.
+
+      Returns:
+        int, new position in serialized data.
+      """
+      value = field_dict.get(key)
+      if value is None:
+        value = field_dict.setdefault(key, new_default(message))
+      while 1:
+        (element, new_pos) = _DecodeSignedVarint32(buffer, pos)
+        # pylint: disable=protected-access
+        if element in enum_type.values_by_number:
+          value.append(element)
+        else:
+          if not message._unknown_fields:
+            message._unknown_fields = []
+          message._unknown_fields.append(
+              (tag_bytes, buffer[pos:new_pos].tobytes()))
+          if message._unknown_field_set is None:
+            message._unknown_field_set = containers.UnknownFieldSet()
+          message._unknown_field_set._add(
+              field_number, wire_format.WIRETYPE_VARINT, element)
+        # pylint: enable=protected-access
+        # Predict that the next tag is another copy of the same repeated
+        # field.
+        pos = new_pos + tag_len
+        if buffer[new_pos:pos] != tag_bytes or new_pos >= end:
+          # Prediction failed.  Return.
+          if new_pos > end:
+            raise _DecodeError('Truncated message.')
+          return new_pos
+    return DecodeRepeatedField
+  else:
+    def DecodeField(buffer, pos, end, message, field_dict):
+      """Decode serialized repeated enum to its value and a new position.
+
+      Args:
+        buffer: memoryview of the serialized bytes.
+        pos: int, position in the memory view to start at.
+        end: int, end position of serialized data
+        message: Message object to store unknown fields in
+        field_dict: Map[Descriptor, Any] to store decoded values in.
+
+      Returns:
+        int, new position in serialized data.
+      """
+      value_start_pos = pos
+      (enum_value, pos) = _DecodeSignedVarint32(buffer, pos)
+      if pos > end:
+        raise _DecodeError('Truncated message.')
+      if clear_if_default and not enum_value:
+        field_dict.pop(key, None)
+        return pos
+      # pylint: disable=protected-access
+      if enum_value in enum_type.values_by_number:
+        field_dict[key] = enum_value
+      else:
+        if not message._unknown_fields:
+          message._unknown_fields = []
+        tag_bytes = encoder.TagBytes(field_number,
+                                     wire_format.WIRETYPE_VARINT)
+        message._unknown_fields.append(
+            (tag_bytes, buffer[value_start_pos:pos].tobytes()))
+        if message._unknown_field_set is None:
+          message._unknown_field_set = containers.UnknownFieldSet()
+        message._unknown_field_set._add(
+            field_number, wire_format.WIRETYPE_VARINT, enum_value)
+        # pylint: enable=protected-access
+      return pos
+    return DecodeField
+
+
+# --------------------------------------------------------------------
+
+
+Int32Decoder = _SimpleDecoder(
+    wire_format.WIRETYPE_VARINT, _DecodeSignedVarint32)
+
+Int64Decoder = _SimpleDecoder(
+    wire_format.WIRETYPE_VARINT, _DecodeSignedVarint)
+
+UInt32Decoder = _SimpleDecoder(wire_format.WIRETYPE_VARINT, _DecodeVarint32)
+UInt64Decoder = _SimpleDecoder(wire_format.WIRETYPE_VARINT, _DecodeVarint)
+
+SInt32Decoder = _ModifiedDecoder(
+    wire_format.WIRETYPE_VARINT, _DecodeVarint32, wire_format.ZigZagDecode)
+SInt64Decoder = _ModifiedDecoder(
+    wire_format.WIRETYPE_VARINT, _DecodeVarint, wire_format.ZigZagDecode)
+
+# Note that Python conveniently guarantees that when using the '<' prefix on
+# formats, they will also have the same size across all platforms (as opposed
+# to without the prefix, where their sizes depend on the C compiler's basic
+# type sizes).
+Fixed32Decoder  = _StructPackDecoder(wire_format.WIRETYPE_FIXED32, '<I')
+Fixed64Decoder  = _StructPackDecoder(wire_format.WIRETYPE_FIXED64, '<Q')
+SFixed32Decoder = _StructPackDecoder(wire_format.WIRETYPE_FIXED32, '<i')
+SFixed64Decoder = _StructPackDecoder(wire_format.WIRETYPE_FIXED64, '<q')
+FloatDecoder = _FloatDecoder()
+DoubleDecoder = _DoubleDecoder()
+
+BoolDecoder = _ModifiedDecoder(
+    wire_format.WIRETYPE_VARINT, _DecodeVarint, bool)
+
+
+def StringDecoder(field_number, is_repeated, is_packed, key, new_default,
+                  is_strict_utf8=False, clear_if_default=False):
+  """Returns a decoder for a string field."""
+
+  local_DecodeVarint = _DecodeVarint
+  local_unicode = six.text_type
+
+  def _ConvertToUnicode(memview):
+    """Convert byte to unicode."""
+    byte_str = memview.tobytes()
+    try:
+      value = local_unicode(byte_str, 'utf-8')
+    except UnicodeDecodeError as e:
+      # add more information to the error message and re-raise it.
+      e.reason = '%s in field: %s' % (e, key.full_name)
+      raise
+
+    if is_strict_utf8 and six.PY2 and sys.maxunicode > _UCS2_MAXUNICODE:
+      # Only do the check for python2 ucs4 when is_strict_utf8 enabled
+      if _SURROGATE_PATTERN.search(value):
+        reason = ('String field %s contains invalid UTF-8 data when parsing'
+                  'a protocol buffer: surrogates not allowed. Use'
+                  'the bytes type if you intend to send raw bytes.') % (
+                      key.full_name)
+        raise message.DecodeError(reason)
+
+    return value
+
+  assert not is_packed
+  if is_repeated:
+    tag_bytes = encoder.TagBytes(field_number,
+                                 wire_format.WIRETYPE_LENGTH_DELIMITED)
+    tag_len = len(tag_bytes)
+    def DecodeRepeatedField(buffer, pos, end, message, field_dict):
+      value = field_dict.get(key)
+      if value is None:
+        value = field_dict.setdefault(key, new_default(message))
+      while 1:
+        (size, pos) = local_DecodeVarint(buffer, pos)
+        new_pos = pos + size
+        if new_pos > end:
+          raise _DecodeError('Truncated string.')
+        value.append(_ConvertToUnicode(buffer[pos:new_pos]))
+        # Predict that the next tag is another copy of the same repeated field.
+        pos = new_pos + tag_len
+        if buffer[new_pos:pos] != tag_bytes or new_pos == end:
+          # Prediction failed.  Return.
+          return new_pos
+    return DecodeRepeatedField
+  else:
+    def DecodeField(buffer, pos, end, message, field_dict):
+      (size, pos) = local_DecodeVarint(buffer, pos)
+      new_pos = pos + size
+      if new_pos > end:
+        raise _DecodeError('Truncated string.')
+      if clear_if_default and not size:
+        field_dict.pop(key, None)
+      else:
+        field_dict[key] = _ConvertToUnicode(buffer[pos:new_pos])
+      return new_pos
+    return DecodeField
+
+
+def BytesDecoder(field_number, is_repeated, is_packed, key, new_default,
+                 clear_if_default=False):
+  """Returns a decoder for a bytes field."""
+
+  local_DecodeVarint = _DecodeVarint
+
+  assert not is_packed
+  if is_repeated:
+    tag_bytes = encoder.TagBytes(field_number,
+                                 wire_format.WIRETYPE_LENGTH_DELIMITED)
+    tag_len = len(tag_bytes)
+    def DecodeRepeatedField(buffer, pos, end, message, field_dict):
+      value = field_dict.get(key)
+      if value is None:
+        value = field_dict.setdefault(key, new_default(message))
+      while 1:
+        (size, pos) = local_DecodeVarint(buffer, pos)
+        new_pos = pos + size
+        if new_pos > end:
+          raise _DecodeError('Truncated string.')
+        value.append(buffer[pos:new_pos].tobytes())
+        # Predict that the next tag is another copy of the same repeated field.
+        pos = new_pos + tag_len
+        if buffer[new_pos:pos] != tag_bytes or new_pos == end:
+          # Prediction failed.  Return.
+          return new_pos
+    return DecodeRepeatedField
+  else:
+    def DecodeField(buffer, pos, end, message, field_dict):
+      (size, pos) = local_DecodeVarint(buffer, pos)
+      new_pos = pos + size
+      if new_pos > end:
+        raise _DecodeError('Truncated string.')
+      if clear_if_default and not size:
+        field_dict.pop(key, None)
+      else:
+        field_dict[key] = buffer[pos:new_pos].tobytes()
+      return new_pos
+    return DecodeField
+
+
+def GroupDecoder(field_number, is_repeated, is_packed, key, new_default):
+  """Returns a decoder for a group field."""
+
+  end_tag_bytes = encoder.TagBytes(field_number,
+                                   wire_format.WIRETYPE_END_GROUP)
+  end_tag_len = len(end_tag_bytes)
+
+  assert not is_packed
+  if is_repeated:
+    tag_bytes = encoder.TagBytes(field_number,
+                                 wire_format.WIRETYPE_START_GROUP)
+    tag_len = len(tag_bytes)
+    def DecodeRepeatedField(buffer, pos, end, message, field_dict):
+      value = field_dict.get(key)
+      if value is None:
+        value = field_dict.setdefault(key, new_default(message))
+      while 1:
+        value = field_dict.get(key)
+        if value is None:
+          value = field_dict.setdefault(key, new_default(message))
+        # Read sub-message.
+        pos = value.add()._InternalParse(buffer, pos, end)
+        # Read end tag.
+        new_pos = pos+end_tag_len
+        if buffer[pos:new_pos] != end_tag_bytes or new_pos > end:
+          raise _DecodeError('Missing group end tag.')
+        # Predict that the next tag is another copy of the same repeated field.
+        pos = new_pos + tag_len
+        if buffer[new_pos:pos] != tag_bytes or new_pos == end:
+          # Prediction failed.  Return.
+          return new_pos
+    return DecodeRepeatedField
+  else:
+    def DecodeField(buffer, pos, end, message, field_dict):
+      value = field_dict.get(key)
+      if value is None:
+        value = field_dict.setdefault(key, new_default(message))
+      # Read sub-message.
+      pos = value._InternalParse(buffer, pos, end)
+      # Read end tag.
+      new_pos = pos+end_tag_len
+      if buffer[pos:new_pos] != end_tag_bytes or new_pos > end:
+        raise _DecodeError('Missing group end tag.')
+      return new_pos
+    return DecodeField
+
+
+def MessageDecoder(field_number, is_repeated, is_packed, key, new_default):
+  """Returns a decoder for a message field."""
+
+  local_DecodeVarint = _DecodeVarint
+
+  assert not is_packed
+  if is_repeated:
+    tag_bytes = encoder.TagBytes(field_number,
+                                 wire_format.WIRETYPE_LENGTH_DELIMITED)
+    tag_len = len(tag_bytes)
+    def DecodeRepeatedField(buffer, pos, end, message, field_dict):
+      value = field_dict.get(key)
+      if value is None:
+        value = field_dict.setdefault(key, new_default(message))
+      while 1:
+        # Read length.
+        (size, pos) = local_DecodeVarint(buffer, pos)
+        new_pos = pos + size
+        if new_pos > end:
+          raise _DecodeError('Truncated message.')
+        # Read sub-message.
+        if value.add()._InternalParse(buffer, pos, new_pos) != new_pos:
+          # The only reason _InternalParse would return early is if it
+          # encountered an end-group tag.
+          raise _DecodeError('Unexpected end-group tag.')
+        # Predict that the next tag is another copy of the same repeated field.
+        pos = new_pos + tag_len
+        if buffer[new_pos:pos] != tag_bytes or new_pos == end:
+          # Prediction failed.  Return.
+          return new_pos
+    return DecodeRepeatedField
+  else:
+    def DecodeField(buffer, pos, end, message, field_dict):
+      value = field_dict.get(key)
+      if value is None:
+        value = field_dict.setdefault(key, new_default(message))
+      # Read length.
+      (size, pos) = local_DecodeVarint(buffer, pos)
+      new_pos = pos + size
+      if new_pos > end:
+        raise _DecodeError('Truncated message.')
+      # Read sub-message.
+      if value._InternalParse(buffer, pos, new_pos) != new_pos:
+        # The only reason _InternalParse would return early is if it encountered
+        # an end-group tag.
+        raise _DecodeError('Unexpected end-group tag.')
+      return new_pos
+    return DecodeField
+
+
+# --------------------------------------------------------------------
+
+MESSAGE_SET_ITEM_TAG = encoder.TagBytes(1, wire_format.WIRETYPE_START_GROUP)
+
+def MessageSetItemDecoder(descriptor):
+  """Returns a decoder for a MessageSet item.
+
+  The parameter is the message Descriptor.
+
+  The message set message looks like this:
+    message MessageSet {
+      repeated group Item = 1 {
+        required int32 type_id = 2;
+        required string message = 3;
+      }
+    }
+  """
+
+  type_id_tag_bytes = encoder.TagBytes(2, wire_format.WIRETYPE_VARINT)
+  message_tag_bytes = encoder.TagBytes(3, wire_format.WIRETYPE_LENGTH_DELIMITED)
+  item_end_tag_bytes = encoder.TagBytes(1, wire_format.WIRETYPE_END_GROUP)
+
+  local_ReadTag = ReadTag
+  local_DecodeVarint = _DecodeVarint
+  local_SkipField = SkipField
+
+  def DecodeItem(buffer, pos, end, message, field_dict):
+    """Decode serialized message set to its value and new position.
+
+    Args:
+      buffer: memoryview of the serialized bytes.
+      pos: int, position in the memory view to start at.
+      end: int, end position of serialized data
+      message: Message object to store unknown fields in
+      field_dict: Map[Descriptor, Any] to store decoded values in.
+
+    Returns:
+      int, new position in serialized data.
+    """
+    message_set_item_start = pos
+    type_id = -1
+    message_start = -1
+    message_end = -1
+
+    # Technically, type_id and message can appear in any order, so we need
+    # a little loop here.
+    while 1:
+      (tag_bytes, pos) = local_ReadTag(buffer, pos)
+      if tag_bytes == type_id_tag_bytes:
+        (type_id, pos) = local_DecodeVarint(buffer, pos)
+      elif tag_bytes == message_tag_bytes:
+        (size, message_start) = local_DecodeVarint(buffer, pos)
+        pos = message_end = message_start + size
+      elif tag_bytes == item_end_tag_bytes:
+        break
+      else:
+        pos = SkipField(buffer, pos, end, tag_bytes)
+        if pos == -1:
+          raise _DecodeError('Missing group end tag.')
+
+    if pos > end:
+      raise _DecodeError('Truncated message.')
+
+    if type_id == -1:
+      raise _DecodeError('MessageSet item missing type_id.')
+    if message_start == -1:
+      raise _DecodeError('MessageSet item missing message.')
+
+    extension = message.Extensions._FindExtensionByNumber(type_id)
+    # pylint: disable=protected-access
+    if extension is not None:
+      value = field_dict.get(extension)
+      if value is None:
+        message_type = extension.message_type
+        if not hasattr(message_type, '_concrete_class'):
+          # pylint: disable=protected-access
+          message._FACTORY.GetPrototype(message_type)
+        value = field_dict.setdefault(
+            extension, message_type._concrete_class())
+      if value._InternalParse(buffer, message_start,message_end) != message_end:
+        # The only reason _InternalParse would return early is if it encountered
+        # an end-group tag.
+        raise _DecodeError('Unexpected end-group tag.')
+    else:
+      if not message._unknown_fields:
+        message._unknown_fields = []
+      message._unknown_fields.append(
+          (MESSAGE_SET_ITEM_TAG, buffer[message_set_item_start:pos].tobytes()))
+      if message._unknown_field_set is None:
+        message._unknown_field_set = containers.UnknownFieldSet()
+      message._unknown_field_set._add(
+          type_id,
+          wire_format.WIRETYPE_LENGTH_DELIMITED,
+          buffer[message_start:message_end].tobytes())
+      # pylint: enable=protected-access
+
+    return pos
+
+  return DecodeItem
+
+# --------------------------------------------------------------------
+
+def MapDecoder(field_descriptor, new_default, is_message_map):
+  """Returns a decoder for a map field."""
+
+  key = field_descriptor
+  tag_bytes = encoder.TagBytes(field_descriptor.number,
+                               wire_format.WIRETYPE_LENGTH_DELIMITED)
+  tag_len = len(tag_bytes)
+  local_DecodeVarint = _DecodeVarint
+  # Can't read _concrete_class yet; might not be initialized.
+  message_type = field_descriptor.message_type
+
+  def DecodeMap(buffer, pos, end, message, field_dict):
+    submsg = message_type._concrete_class()
+    value = field_dict.get(key)
+    if value is None:
+      value = field_dict.setdefault(key, new_default(message))
+    while 1:
+      # Read length.
+      (size, pos) = local_DecodeVarint(buffer, pos)
+      new_pos = pos + size
+      if new_pos > end:
+        raise _DecodeError('Truncated message.')
+      # Read sub-message.
+      submsg.Clear()
+      if submsg._InternalParse(buffer, pos, new_pos) != new_pos:
+        # The only reason _InternalParse would return early is if it
+        # encountered an end-group tag.
+        raise _DecodeError('Unexpected end-group tag.')
+
+      if is_message_map:
+        value[submsg.key].CopyFrom(submsg.value)
+      else:
+        value[submsg.key] = submsg.value
+
+      # Predict that the next tag is another copy of the same repeated field.
+      pos = new_pos + tag_len
+      if buffer[new_pos:pos] != tag_bytes or new_pos == end:
+        # Prediction failed.  Return.
+        return new_pos
+
+  return DecodeMap
+
+# --------------------------------------------------------------------
+# Optimization is not as heavy here because calls to SkipField() are rare,
+# except for handling end-group tags.
+
+def _SkipVarint(buffer, pos, end):
+  """Skip a varint value.  Returns the new position."""
+  # Previously ord(buffer[pos]) raised IndexError when pos is out of range.
+  # With this code, ord(b'') raises TypeError.  Both are handled in
+  # python_message.py to generate a 'Truncated message' error.
+  while ord(buffer[pos:pos+1].tobytes()) & 0x80:
+    pos += 1
+  pos += 1
+  if pos > end:
+    raise _DecodeError('Truncated message.')
+  return pos
+
+def _SkipFixed64(buffer, pos, end):
+  """Skip a fixed64 value.  Returns the new position."""
+
+  pos += 8
+  if pos > end:
+    raise _DecodeError('Truncated message.')
+  return pos
+
+
+def _DecodeFixed64(buffer, pos):
+  """Decode a fixed64."""
+  new_pos = pos + 8
+  return (struct.unpack('<Q', buffer[pos:new_pos])[0], new_pos)
+
+
+def _SkipLengthDelimited(buffer, pos, end):
+  """Skip a length-delimited value.  Returns the new position."""
+
+  (size, pos) = _DecodeVarint(buffer, pos)
+  pos += size
+  if pos > end:
+    raise _DecodeError('Truncated message.')
+  return pos
+
+
+def _SkipGroup(buffer, pos, end):
+  """Skip sub-group.  Returns the new position."""
+
+  while 1:
+    (tag_bytes, pos) = ReadTag(buffer, pos)
+    new_pos = SkipField(buffer, pos, end, tag_bytes)
+    if new_pos == -1:
+      return pos
+    pos = new_pos
+
+
+def _DecodeUnknownFieldSet(buffer, pos, end_pos=None):
+  """Decode UnknownFieldSet.  Returns the UnknownFieldSet and new position."""
+
+  unknown_field_set = containers.UnknownFieldSet()
+  while end_pos is None or pos < end_pos:
+    (tag_bytes, pos) = ReadTag(buffer, pos)
+    (tag, _) = _DecodeVarint(tag_bytes, 0)
+    field_number, wire_type = wire_format.UnpackTag(tag)
+    if wire_type == wire_format.WIRETYPE_END_GROUP:
+      break
+    (data, pos) = _DecodeUnknownField(buffer, pos, wire_type)
+    # pylint: disable=protected-access
+    unknown_field_set._add(field_number, wire_type, data)
+
+  return (unknown_field_set, pos)
+
+
+def _DecodeUnknownField(buffer, pos, wire_type):
+  """Decode a unknown field.  Returns the UnknownField and new position."""
+
+  if wire_type == wire_format.WIRETYPE_VARINT:
+    (data, pos) = _DecodeVarint(buffer, pos)
+  elif wire_type == wire_format.WIRETYPE_FIXED64:
+    (data, pos) = _DecodeFixed64(buffer, pos)
+  elif wire_type == wire_format.WIRETYPE_FIXED32:
+    (data, pos) = _DecodeFixed32(buffer, pos)
+  elif wire_type == wire_format.WIRETYPE_LENGTH_DELIMITED:
+    (size, pos) = _DecodeVarint(buffer, pos)
+    data = buffer[pos:pos+size].tobytes()
+    pos += size
+  elif wire_type == wire_format.WIRETYPE_START_GROUP:
+    (data, pos) = _DecodeUnknownFieldSet(buffer, pos)
+  elif wire_type == wire_format.WIRETYPE_END_GROUP:
+    return (0, -1)
+  else:
+    raise _DecodeError('Wrong wire type in tag.')
+
+  return (data, pos)
+
+
+def _EndGroup(buffer, pos, end):
+  """Skipping an END_GROUP tag returns -1 to tell the parent loop to break."""
+
+  return -1
+
+
+def _SkipFixed32(buffer, pos, end):
+  """Skip a fixed32 value.  Returns the new position."""
+
+  pos += 4
+  if pos > end:
+    raise _DecodeError('Truncated message.')
+  return pos
+
+
+def _DecodeFixed32(buffer, pos):
+  """Decode a fixed32."""
+
+  new_pos = pos + 4
+  return (struct.unpack('<I', buffer[pos:new_pos])[0], new_pos)
+
+
+def _RaiseInvalidWireType(buffer, pos, end):
+  """Skip function for unknown wire types.  Raises an exception."""
+
+  raise _DecodeError('Tag had invalid wire type.')
+
+def _FieldSkipper():
+  """Constructs the SkipField function."""
+
+  WIRETYPE_TO_SKIPPER = [
+      _SkipVarint,
+      _SkipFixed64,
+      _SkipLengthDelimited,
+      _SkipGroup,
+      _EndGroup,
+      _SkipFixed32,
+      _RaiseInvalidWireType,
+      _RaiseInvalidWireType,
+      ]
+
+  wiretype_mask = wire_format.TAG_TYPE_MASK
+
+  def SkipField(buffer, pos, end, tag_bytes):
+    """Skips a field with the specified tag.
+
+    |pos| should point to the byte immediately after the tag.
+
+    Returns:
+        The new position (after the tag value), or -1 if the tag is an end-group
+        tag (in which case the calling loop should break).
+    """
+
+    # The wire type is always in the first byte since varints are little-endian.
+    wire_type = ord(tag_bytes[0:1]) & wiretype_mask
+    return WIRETYPE_TO_SKIPPER[wire_type](buffer, pos, end)
+
+  return SkipField
+
+SkipField = _FieldSkipper()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_database_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_database_test.py
new file mode 100644
index 0000000..619779a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_database_test.py
@@ -0,0 +1,132 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests for google.protobuf.descriptor_database."""
+
+__author__ = 'matthewtoia@google.com (Matt Toia)'
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+import warnings
+
+from google.protobuf import unittest_pb2
+from google.protobuf import descriptor_pb2
+from google.protobuf.internal import factory_test2_pb2
+from google.protobuf.internal import no_package_pb2
+from google.protobuf.internal import testing_refleaks
+from google.protobuf import descriptor_database
+
+
+@testing_refleaks.TestCase
+class DescriptorDatabaseTest(unittest.TestCase):
+
+  def testAdd(self):
+    db = descriptor_database.DescriptorDatabase()
+    file_desc_proto = descriptor_pb2.FileDescriptorProto.FromString(
+        factory_test2_pb2.DESCRIPTOR.serialized_pb)
+    file_desc_proto2 = descriptor_pb2.FileDescriptorProto.FromString(
+        no_package_pb2.DESCRIPTOR.serialized_pb)
+    db.Add(file_desc_proto)
+    db.Add(file_desc_proto2)
+
+    self.assertEqual(file_desc_proto, db.FindFileByName(
+        'google/protobuf/internal/factory_test2.proto'))
+    # Can find message type.
+    self.assertEqual(file_desc_proto, db.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory2Message'))
+    # Can find nested message type.
+    self.assertEqual(file_desc_proto, db.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory2Message.NestedFactory2Message'))
+    # Can find enum type.
+    self.assertEqual(file_desc_proto, db.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory2Enum'))
+    # Can find nested enum type.
+    self.assertEqual(file_desc_proto, db.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory2Message.NestedFactory2Enum'))
+    self.assertEqual(file_desc_proto, db.FindFileContainingSymbol(
+        'google.protobuf.python.internal.MessageWithNestedEnumOnly.NestedEnum'))
+    # Can find field.
+    self.assertEqual(file_desc_proto, db.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory2Message.list_field'))
+    # Can find enum value.
+    self.assertEqual(file_desc_proto, db.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory2Enum.FACTORY_2_VALUE_0'))
+    self.assertEqual(file_desc_proto, db.FindFileContainingSymbol(
+        'google.protobuf.python.internal.FACTORY_2_VALUE_0'))
+    self.assertEqual(file_desc_proto2, db.FindFileContainingSymbol(
+        '.NO_PACKAGE_VALUE_0'))
+    # Can find top level extension.
+    self.assertEqual(file_desc_proto, db.FindFileContainingSymbol(
+        'google.protobuf.python.internal.another_field'))
+    # Can find nested extension inside a message.
+    self.assertEqual(file_desc_proto, db.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory2Message.one_more_field'))
+
+    # Can find service.
+    file_desc_proto2 = descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_pb2.DESCRIPTOR.serialized_pb)
+    db.Add(file_desc_proto2)
+    self.assertEqual(file_desc_proto2, db.FindFileContainingSymbol(
+        'protobuf_unittest.TestService'))
+
+    # Non-existent field under a valid top level symbol can also be
+    # found. The behavior is the same with protobuf C++.
+    self.assertEqual(file_desc_proto2, db.FindFileContainingSymbol(
+        'protobuf_unittest.TestAllTypes.none_field'))
+
+    with self.assertRaisesRegexp(KeyError, r'\'protobuf_unittest\.NoneMessage\''):
+      db.FindFileContainingSymbol('protobuf_unittest.NoneMessage')
+
+  def testConflictRegister(self):
+    db = descriptor_database.DescriptorDatabase()
+    unittest_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_pb2.DESCRIPTOR.serialized_pb)
+    db.Add(unittest_fd)
+    conflict_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_pb2.DESCRIPTOR.serialized_pb)
+    conflict_fd.name = 'other_file2'
+    with warnings.catch_warnings(record=True) as w:
+      # Cause all warnings to always be triggered.
+      warnings.simplefilter('always')
+      db.Add(conflict_fd)
+      self.assertTrue(len(w))
+      self.assertIs(w[0].category, RuntimeWarning)
+      self.assertIn('Conflict register for file "other_file2": ',
+                    str(w[0].message))
+      self.assertIn('already defined in file '
+                    '"google/protobuf/unittest.proto"',
+                    str(w[0].message))
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_pool_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_pool_test.py
new file mode 100644
index 0000000..fed82bf
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_pool_test.py
@@ -0,0 +1,1139 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests for google.protobuf.descriptor_pool."""
+
+__author__ = 'matthewtoia@google.com (Matt Toia)'
+
+import copy
+import os
+import warnings
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import unittest_import_pb2
+from google.protobuf import unittest_import_public_pb2
+from google.protobuf import unittest_pb2
+from google.protobuf import descriptor_pb2
+from google.protobuf.internal import api_implementation
+from google.protobuf.internal import descriptor_pool_test1_pb2
+from google.protobuf.internal import descriptor_pool_test2_pb2
+from google.protobuf.internal import factory_test1_pb2
+from google.protobuf.internal import factory_test2_pb2
+from google.protobuf.internal import file_options_test_pb2
+from google.protobuf.internal import more_messages_pb2
+from google.protobuf.internal import no_package_pb2
+from google.protobuf.internal import testing_refleaks
+from google.protobuf import descriptor
+from google.protobuf import descriptor_database
+from google.protobuf import descriptor_pool
+from google.protobuf import message_factory
+from google.protobuf import symbol_database
+
+
+
+warnings.simplefilter('error', DeprecationWarning)
+
+
+class DescriptorPoolTestBase(object):
+
+  def testFindFileByName(self):
+    name1 = 'google/protobuf/internal/factory_test1.proto'
+    file_desc1 = self.pool.FindFileByName(name1)
+    self.assertIsInstance(file_desc1, descriptor.FileDescriptor)
+    self.assertEqual(name1, file_desc1.name)
+    self.assertEqual('google.protobuf.python.internal', file_desc1.package)
+    self.assertIn('Factory1Message', file_desc1.message_types_by_name)
+
+    name2 = 'google/protobuf/internal/factory_test2.proto'
+    file_desc2 = self.pool.FindFileByName(name2)
+    self.assertIsInstance(file_desc2, descriptor.FileDescriptor)
+    self.assertEqual(name2, file_desc2.name)
+    self.assertEqual('google.protobuf.python.internal', file_desc2.package)
+    self.assertIn('Factory2Message', file_desc2.message_types_by_name)
+
+  def testFindFileByNameFailure(self):
+    with self.assertRaises(KeyError):
+      self.pool.FindFileByName('Does not exist')
+
+  def testFindFileContainingSymbol(self):
+    file_desc1 = self.pool.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory1Message')
+    self.assertIsInstance(file_desc1, descriptor.FileDescriptor)
+    self.assertEqual('google/protobuf/internal/factory_test1.proto',
+                     file_desc1.name)
+    self.assertEqual('google.protobuf.python.internal', file_desc1.package)
+    self.assertIn('Factory1Message', file_desc1.message_types_by_name)
+
+    file_desc2 = self.pool.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory2Message')
+    self.assertIsInstance(file_desc2, descriptor.FileDescriptor)
+    self.assertEqual('google/protobuf/internal/factory_test2.proto',
+                     file_desc2.name)
+    self.assertEqual('google.protobuf.python.internal', file_desc2.package)
+    self.assertIn('Factory2Message', file_desc2.message_types_by_name)
+
+    # Tests top level extension.
+    file_desc3 = self.pool.FindFileContainingSymbol(
+        'google.protobuf.python.internal.another_field')
+    self.assertIsInstance(file_desc3, descriptor.FileDescriptor)
+    self.assertEqual('google/protobuf/internal/factory_test2.proto',
+                     file_desc3.name)
+
+    # Tests nested extension inside a message.
+    file_desc4 = self.pool.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory2Message.one_more_field')
+    self.assertIsInstance(file_desc4, descriptor.FileDescriptor)
+    self.assertEqual('google/protobuf/internal/factory_test2.proto',
+                     file_desc4.name)
+
+    file_desc5 = self.pool.FindFileContainingSymbol(
+        'protobuf_unittest.TestService')
+    self.assertIsInstance(file_desc5, descriptor.FileDescriptor)
+    self.assertEqual('google/protobuf/unittest.proto',
+                     file_desc5.name)
+    # Tests the generated pool.
+    assert descriptor_pool.Default().FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory2Message.one_more_field')
+    assert descriptor_pool.Default().FindFileContainingSymbol(
+        'google.protobuf.python.internal.another_field')
+    assert descriptor_pool.Default().FindFileContainingSymbol(
+        'protobuf_unittest.TestService')
+
+    # Can find field.
+    file_desc6 = self.pool.FindFileContainingSymbol(
+        'google.protobuf.python.internal.Factory1Message.list_value')
+    self.assertIsInstance(file_desc6, descriptor.FileDescriptor)
+    self.assertEqual('google/protobuf/internal/factory_test1.proto',
+                     file_desc6.name)
+
+    # Can find top level Enum value.
+    file_desc7 = self.pool.FindFileContainingSymbol(
+        'google.protobuf.python.internal.FACTORY_1_VALUE_0')
+    self.assertIsInstance(file_desc7, descriptor.FileDescriptor)
+    self.assertEqual('google/protobuf/internal/factory_test1.proto',
+                     file_desc7.name)
+
+    # Can find nested Enum value.
+    file_desc8 = self.pool.FindFileContainingSymbol(
+        'protobuf_unittest.TestAllTypes.FOO')
+    self.assertIsInstance(file_desc8, descriptor.FileDescriptor)
+    self.assertEqual('google/protobuf/unittest.proto',
+                     file_desc8.name)
+
+    # TODO(jieluo): Add tests for no package when b/13860351 is fixed.
+
+    self.assertRaises(KeyError, self.pool.FindFileContainingSymbol,
+                      'google.protobuf.python.internal.Factory1Message.none_field')
+
+  def testFindFileContainingSymbolFailure(self):
+    with self.assertRaises(KeyError):
+      self.pool.FindFileContainingSymbol('Does not exist')
+
+  def testFindMessageTypeByName(self):
+    msg1 = self.pool.FindMessageTypeByName(
+        'google.protobuf.python.internal.Factory1Message')
+    self.assertIsInstance(msg1, descriptor.Descriptor)
+    self.assertEqual('Factory1Message', msg1.name)
+    self.assertEqual('google.protobuf.python.internal.Factory1Message',
+                     msg1.full_name)
+    self.assertEqual(None, msg1.containing_type)
+    self.assertFalse(msg1.has_options)
+
+    nested_msg1 = msg1.nested_types[0]
+    self.assertEqual('NestedFactory1Message', nested_msg1.name)
+    self.assertEqual(msg1, nested_msg1.containing_type)
+
+    nested_enum1 = msg1.enum_types[0]
+    self.assertEqual('NestedFactory1Enum', nested_enum1.name)
+    self.assertEqual(msg1, nested_enum1.containing_type)
+
+    self.assertEqual(nested_msg1, msg1.fields_by_name[
+        'nested_factory_1_message'].message_type)
+    self.assertEqual(nested_enum1, msg1.fields_by_name[
+        'nested_factory_1_enum'].enum_type)
+
+    msg2 = self.pool.FindMessageTypeByName(
+        'google.protobuf.python.internal.Factory2Message')
+    self.assertIsInstance(msg2, descriptor.Descriptor)
+    self.assertEqual('Factory2Message', msg2.name)
+    self.assertEqual('google.protobuf.python.internal.Factory2Message',
+                     msg2.full_name)
+    self.assertIsNone(msg2.containing_type)
+
+    nested_msg2 = msg2.nested_types[0]
+    self.assertEqual('NestedFactory2Message', nested_msg2.name)
+    self.assertEqual(msg2, nested_msg2.containing_type)
+
+    nested_enum2 = msg2.enum_types[0]
+    self.assertEqual('NestedFactory2Enum', nested_enum2.name)
+    self.assertEqual(msg2, nested_enum2.containing_type)
+
+    self.assertEqual(nested_msg2, msg2.fields_by_name[
+        'nested_factory_2_message'].message_type)
+    self.assertEqual(nested_enum2, msg2.fields_by_name[
+        'nested_factory_2_enum'].enum_type)
+
+    self.assertTrue(msg2.fields_by_name['int_with_default'].has_default_value)
+    self.assertEqual(
+        1776, msg2.fields_by_name['int_with_default'].default_value)
+
+    self.assertTrue(
+        msg2.fields_by_name['double_with_default'].has_default_value)
+    self.assertEqual(
+        9.99, msg2.fields_by_name['double_with_default'].default_value)
+
+    self.assertTrue(
+        msg2.fields_by_name['string_with_default'].has_default_value)
+    self.assertEqual(
+        'hello world', msg2.fields_by_name['string_with_default'].default_value)
+
+    self.assertTrue(msg2.fields_by_name['bool_with_default'].has_default_value)
+    self.assertFalse(msg2.fields_by_name['bool_with_default'].default_value)
+
+    self.assertTrue(msg2.fields_by_name['enum_with_default'].has_default_value)
+    self.assertEqual(
+        1, msg2.fields_by_name['enum_with_default'].default_value)
+
+    msg3 = self.pool.FindMessageTypeByName(
+        'google.protobuf.python.internal.Factory2Message.NestedFactory2Message')
+    self.assertEqual(nested_msg2, msg3)
+
+    self.assertTrue(msg2.fields_by_name['bytes_with_default'].has_default_value)
+    self.assertEqual(
+        b'a\xfb\x00c',
+        msg2.fields_by_name['bytes_with_default'].default_value)
+
+    self.assertEqual(1, len(msg2.oneofs))
+    self.assertEqual(1, len(msg2.oneofs_by_name))
+    self.assertEqual(2, len(msg2.oneofs[0].fields))
+    for name in ['oneof_int', 'oneof_string']:
+      self.assertEqual(msg2.oneofs[0],
+                       msg2.fields_by_name[name].containing_oneof)
+      self.assertIn(msg2.fields_by_name[name], msg2.oneofs[0].fields)
+
+  def testFindTypeErrors(self):
+    self.assertRaises(TypeError, self.pool.FindExtensionByNumber, '')
+    self.assertRaises(KeyError, self.pool.FindMethodByName, '')
+
+    # TODO(jieluo): Fix python to raise correct errors.
+    if api_implementation.Type() == 'cpp':
+      error_type = TypeError
+    else:
+      error_type = AttributeError
+    self.assertRaises(error_type, self.pool.FindMessageTypeByName, 0)
+    self.assertRaises(error_type, self.pool.FindFieldByName, 0)
+    self.assertRaises(error_type, self.pool.FindExtensionByName, 0)
+    self.assertRaises(error_type, self.pool.FindEnumTypeByName, 0)
+    self.assertRaises(error_type, self.pool.FindOneofByName, 0)
+    self.assertRaises(error_type, self.pool.FindServiceByName, 0)
+    self.assertRaises(error_type, self.pool.FindMethodByName, 0)
+    self.assertRaises(error_type, self.pool.FindFileContainingSymbol, 0)
+    if api_implementation.Type() == 'python':
+      error_type = KeyError
+    self.assertRaises(error_type, self.pool.FindFileByName, 0)
+
+  def testFindMessageTypeByNameFailure(self):
+    with self.assertRaises(KeyError):
+      self.pool.FindMessageTypeByName('Does not exist')
+
+  def testFindEnumTypeByName(self):
+    enum1 = self.pool.FindEnumTypeByName(
+        'google.protobuf.python.internal.Factory1Enum')
+    self.assertIsInstance(enum1, descriptor.EnumDescriptor)
+    self.assertEqual(0, enum1.values_by_name['FACTORY_1_VALUE_0'].number)
+    self.assertEqual(1, enum1.values_by_name['FACTORY_1_VALUE_1'].number)
+    self.assertFalse(enum1.has_options)
+
+    nested_enum1 = self.pool.FindEnumTypeByName(
+        'google.protobuf.python.internal.Factory1Message.NestedFactory1Enum')
+    self.assertIsInstance(nested_enum1, descriptor.EnumDescriptor)
+    self.assertEqual(
+        0, nested_enum1.values_by_name['NESTED_FACTORY_1_VALUE_0'].number)
+    self.assertEqual(
+        1, nested_enum1.values_by_name['NESTED_FACTORY_1_VALUE_1'].number)
+
+    enum2 = self.pool.FindEnumTypeByName(
+        'google.protobuf.python.internal.Factory2Enum')
+    self.assertIsInstance(enum2, descriptor.EnumDescriptor)
+    self.assertEqual(0, enum2.values_by_name['FACTORY_2_VALUE_0'].number)
+    self.assertEqual(1, enum2.values_by_name['FACTORY_2_VALUE_1'].number)
+
+    nested_enum2 = self.pool.FindEnumTypeByName(
+        'google.protobuf.python.internal.Factory2Message.NestedFactory2Enum')
+    self.assertIsInstance(nested_enum2, descriptor.EnumDescriptor)
+    self.assertEqual(
+        0, nested_enum2.values_by_name['NESTED_FACTORY_2_VALUE_0'].number)
+    self.assertEqual(
+        1, nested_enum2.values_by_name['NESTED_FACTORY_2_VALUE_1'].number)
+
+  def testFindEnumTypeByNameFailure(self):
+    with self.assertRaises(KeyError):
+      self.pool.FindEnumTypeByName('Does not exist')
+
+  def testFindFieldByName(self):
+    field = self.pool.FindFieldByName(
+        'google.protobuf.python.internal.Factory1Message.list_value')
+    self.assertEqual(field.name, 'list_value')
+    self.assertEqual(field.label, field.LABEL_REPEATED)
+    self.assertFalse(field.has_options)
+
+    with self.assertRaises(KeyError):
+      self.pool.FindFieldByName('Does not exist')
+
+  def testFindOneofByName(self):
+    oneof = self.pool.FindOneofByName(
+        'google.protobuf.python.internal.Factory2Message.oneof_field')
+    self.assertEqual(oneof.name, 'oneof_field')
+    with self.assertRaises(KeyError):
+      self.pool.FindOneofByName('Does not exist')
+
+  def testFindExtensionByName(self):
+    # An extension defined in a message.
+    extension = self.pool.FindExtensionByName(
+        'google.protobuf.python.internal.Factory2Message.one_more_field')
+    self.assertEqual(extension.name, 'one_more_field')
+    # An extension defined at file scope.
+    extension = self.pool.FindExtensionByName(
+        'google.protobuf.python.internal.another_field')
+    self.assertEqual(extension.name, 'another_field')
+    self.assertEqual(extension.number, 1002)
+    with self.assertRaises(KeyError):
+      self.pool.FindFieldByName('Does not exist')
+
+  def testFindAllExtensions(self):
+    factory1_message = self.pool.FindMessageTypeByName(
+        'google.protobuf.python.internal.Factory1Message')
+    factory2_message = self.pool.FindMessageTypeByName(
+        'google.protobuf.python.internal.Factory2Message')
+    # An extension defined in a message.
+    one_more_field = factory2_message.extensions_by_name['one_more_field']
+    # An extension defined at file scope.
+    factory_test2 = self.pool.FindFileByName(
+        'google/protobuf/internal/factory_test2.proto')
+    another_field = factory_test2.extensions_by_name['another_field']
+
+    extensions = self.pool.FindAllExtensions(factory1_message)
+    expected_extension_numbers = set([one_more_field, another_field])
+    self.assertEqual(expected_extension_numbers, set(extensions))
+    # Verify that mutating the returned list does not affect the pool.
+    extensions.append('unexpected_element')
+    # Get the extensions again, the returned value does not contain the
+    # 'unexpected_element'.
+    extensions = self.pool.FindAllExtensions(factory1_message)
+    self.assertEqual(expected_extension_numbers, set(extensions))
+
+  def testFindExtensionByNumber(self):
+    factory1_message = self.pool.FindMessageTypeByName(
+        'google.protobuf.python.internal.Factory1Message')
+    # Build factory_test2.proto which will put extensions to the pool
+    self.pool.FindFileByName(
+        'google/protobuf/internal/factory_test2.proto')
+
+    # An extension defined in a message.
+    extension = self.pool.FindExtensionByNumber(factory1_message, 1001)
+    self.assertEqual(extension.name, 'one_more_field')
+    # An extension defined at file scope.
+    extension = self.pool.FindExtensionByNumber(factory1_message, 1002)
+    self.assertEqual(extension.name, 'another_field')
+    with self.assertRaises(KeyError):
+      extension = self.pool.FindExtensionByNumber(factory1_message, 1234567)
+
+  def testExtensionsAreNotFields(self):
+    with self.assertRaises(KeyError):
+      self.pool.FindFieldByName('google.protobuf.python.internal.another_field')
+    with self.assertRaises(KeyError):
+      self.pool.FindFieldByName(
+          'google.protobuf.python.internal.Factory2Message.one_more_field')
+    with self.assertRaises(KeyError):
+      self.pool.FindExtensionByName(
+          'google.protobuf.python.internal.Factory1Message.list_value')
+
+  def testFindService(self):
+    service = self.pool.FindServiceByName('protobuf_unittest.TestService')
+    self.assertEqual(service.full_name, 'protobuf_unittest.TestService')
+    with self.assertRaises(KeyError):
+      self.pool.FindServiceByName('Does not exist')
+
+    method = self.pool.FindMethodByName('protobuf_unittest.TestService.Foo')
+    self.assertIs(method.containing_service, service)
+    with self.assertRaises(KeyError):
+      self.pool.FindMethodByName('protobuf_unittest.TestService.Doesnotexist')
+
+  def testUserDefinedDB(self):
+    db = descriptor_database.DescriptorDatabase()
+    self.pool = descriptor_pool.DescriptorPool(db)
+    db.Add(self.factory_test1_fd)
+    db.Add(self.factory_test2_fd)
+    self.testFindMessageTypeByName()
+
+  def testAddSerializedFile(self):
+    if isinstance(self, SecondaryDescriptorFromDescriptorDB):
+      if api_implementation.Type() == 'cpp':
+        # Cpp extension cannot call Add on a DescriptorPool
+        # that uses a DescriptorDatabase.
+        # TODO(jieluo): Fix python and cpp extension diff.
+        return
+    self.pool = descriptor_pool.DescriptorPool()
+    self.pool.AddSerializedFile(self.factory_test1_fd.SerializeToString())
+    self.pool.AddSerializedFile(self.factory_test2_fd.SerializeToString())
+    self.testFindMessageTypeByName()
+
+
+  def testEnumDefaultValue(self):
+    """Test the default value of enums which don't start at zero."""
+    def _CheckDefaultValue(file_descriptor):
+      default_value = (file_descriptor
+                       .message_types_by_name['DescriptorPoolTest1']
+                       .fields_by_name['nested_enum']
+                       .default_value)
+      self.assertEqual(default_value,
+                       descriptor_pool_test1_pb2.DescriptorPoolTest1.BETA)
+    # First check what the generated descriptor contains.
+    _CheckDefaultValue(descriptor_pool_test1_pb2.DESCRIPTOR)
+    # Then check the generated pool. Normally this is the same descriptor.
+    file_descriptor = symbol_database.Default().pool.FindFileByName(
+        'google/protobuf/internal/descriptor_pool_test1.proto')
+    self.assertIs(file_descriptor, descriptor_pool_test1_pb2.DESCRIPTOR)
+    _CheckDefaultValue(file_descriptor)
+
+    if isinstance(self, SecondaryDescriptorFromDescriptorDB):
+      if api_implementation.Type() == 'cpp':
+        # Cpp extension cannot call Add on a DescriptorPool
+        # that uses a DescriptorDatabase.
+        # TODO(jieluo): Fix python and cpp extension diff.
+        return
+    # Then check the dynamic pool and its internal DescriptorDatabase.
+    descriptor_proto = descriptor_pb2.FileDescriptorProto.FromString(
+        descriptor_pool_test1_pb2.DESCRIPTOR.serialized_pb)
+    self.pool.Add(descriptor_proto)
+    # And do the same check as above
+    file_descriptor = self.pool.FindFileByName(
+        'google/protobuf/internal/descriptor_pool_test1.proto')
+    _CheckDefaultValue(file_descriptor)
+
+  def testDefaultValueForCustomMessages(self):
+    """Check the value returned by non-existent fields."""
+    def _CheckValueAndType(value, expected_value, expected_type):
+      self.assertEqual(value, expected_value)
+      self.assertIsInstance(value, expected_type)
+
+    def _CheckDefaultValues(msg):
+      try:
+        int64 = long
+      except NameError:  # Python3
+        int64 = int
+      try:
+        unicode_type = unicode
+      except NameError:  # Python3
+        unicode_type = str
+      _CheckValueAndType(msg.optional_int32, 0, int)
+      _CheckValueAndType(msg.optional_uint64, 0, (int64, int))
+      _CheckValueAndType(msg.optional_float, 0, (float, int))
+      _CheckValueAndType(msg.optional_double, 0, (float, int))
+      _CheckValueAndType(msg.optional_bool, False, bool)
+      _CheckValueAndType(msg.optional_string, u'', unicode_type)
+      _CheckValueAndType(msg.optional_bytes, b'', bytes)
+      _CheckValueAndType(msg.optional_nested_enum, msg.FOO, int)
+    # First for the generated message
+    _CheckDefaultValues(unittest_pb2.TestAllTypes())
+    # Then for a message built with from the DescriptorPool.
+    pool = descriptor_pool.DescriptorPool()
+    pool.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_import_public_pb2.DESCRIPTOR.serialized_pb))
+    pool.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_import_pb2.DESCRIPTOR.serialized_pb))
+    pool.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_pb2.DESCRIPTOR.serialized_pb))
+    message_class = message_factory.MessageFactory(pool).GetPrototype(
+        pool.FindMessageTypeByName(
+            unittest_pb2.TestAllTypes.DESCRIPTOR.full_name))
+    _CheckDefaultValues(message_class())
+
+  def testAddFileDescriptor(self):
+    if isinstance(self, SecondaryDescriptorFromDescriptorDB):
+      if api_implementation.Type() == 'cpp':
+        # Cpp extension cannot call Add on a DescriptorPool
+        # that uses a DescriptorDatabase.
+        # TODO(jieluo): Fix python and cpp extension diff.
+        return
+    file_desc = descriptor_pb2.FileDescriptorProto(name='some/file.proto')
+    self.pool.Add(file_desc)
+    self.pool.AddSerializedFile(file_desc.SerializeToString())
+
+  def testComplexNesting(self):
+    if isinstance(self, SecondaryDescriptorFromDescriptorDB):
+      if api_implementation.Type() == 'cpp':
+        # Cpp extension cannot call Add on a DescriptorPool
+        # that uses a DescriptorDatabase.
+        # TODO(jieluo): Fix python and cpp extension diff.
+        return
+    more_messages_desc = descriptor_pb2.FileDescriptorProto.FromString(
+        more_messages_pb2.DESCRIPTOR.serialized_pb)
+    test1_desc = descriptor_pb2.FileDescriptorProto.FromString(
+        descriptor_pool_test1_pb2.DESCRIPTOR.serialized_pb)
+    test2_desc = descriptor_pb2.FileDescriptorProto.FromString(
+        descriptor_pool_test2_pb2.DESCRIPTOR.serialized_pb)
+    self.pool.Add(more_messages_desc)
+    self.pool.Add(test1_desc)
+    self.pool.Add(test2_desc)
+    TEST1_FILE.CheckFile(self, self.pool)
+    TEST2_FILE.CheckFile(self, self.pool)
+
+  def testConflictRegister(self):
+    if isinstance(self, SecondaryDescriptorFromDescriptorDB):
+      if api_implementation.Type() == 'cpp':
+        # Cpp extension cannot call Add on a DescriptorPool
+        # that uses a DescriptorDatabase.
+        # TODO(jieluo): Fix python and cpp extension diff.
+        return
+    unittest_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_pb2.DESCRIPTOR.serialized_pb)
+    conflict_fd = copy.deepcopy(unittest_fd)
+    conflict_fd.name = 'other_file'
+    if api_implementation.Type() == 'cpp':
+        pass
+    else:
+      pool = copy.deepcopy(self.pool)
+      file_descriptor = unittest_pb2.DESCRIPTOR
+      pool._AddDescriptor(
+          file_descriptor.message_types_by_name['TestAllTypes'])
+      pool._AddEnumDescriptor(
+          file_descriptor.enum_types_by_name['ForeignEnum'])
+      pool._AddServiceDescriptor(
+          file_descriptor.services_by_name['TestService'])
+      pool._AddExtensionDescriptor(
+          file_descriptor.extensions_by_name['optional_int32_extension'])
+      pool.Add(unittest_fd)
+      pool.Add(conflict_fd)
+      pool.FindFileByName(unittest_fd.name)
+      with self.assertRaises(TypeError):
+        pool.FindFileByName(conflict_fd.name)
+
+
+@testing_refleaks.TestCase
+class DefaultDescriptorPoolTest(DescriptorPoolTestBase, unittest.TestCase):
+
+  def setUp(self):
+    self.pool = descriptor_pool.Default()
+    self.factory_test1_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        factory_test1_pb2.DESCRIPTOR.serialized_pb)
+    self.factory_test2_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        factory_test2_pb2.DESCRIPTOR.serialized_pb)
+
+  def testFindMethods(self):
+    self.assertIs(
+        self.pool.FindFileByName('google/protobuf/unittest.proto'),
+        unittest_pb2.DESCRIPTOR)
+    self.assertIs(
+        self.pool.FindMessageTypeByName('protobuf_unittest.TestAllTypes'),
+        unittest_pb2.TestAllTypes.DESCRIPTOR)
+    self.assertIs(
+        self.pool.FindFieldByName(
+            'protobuf_unittest.TestAllTypes.optional_int32'),
+        unittest_pb2.TestAllTypes.DESCRIPTOR.fields_by_name['optional_int32'])
+    self.assertIs(
+        self.pool.FindEnumTypeByName('protobuf_unittest.ForeignEnum'),
+        unittest_pb2.ForeignEnum.DESCRIPTOR)
+    self.assertIs(
+        self.pool.FindExtensionByName(
+            'protobuf_unittest.optional_int32_extension'),
+        unittest_pb2.DESCRIPTOR.extensions_by_name['optional_int32_extension'])
+    self.assertIs(
+        self.pool.FindOneofByName('protobuf_unittest.TestAllTypes.oneof_field'),
+        unittest_pb2.TestAllTypes.DESCRIPTOR.oneofs_by_name['oneof_field'])
+    self.assertIs(
+        self.pool.FindServiceByName('protobuf_unittest.TestService'),
+        unittest_pb2.DESCRIPTOR.services_by_name['TestService'])
+
+
+@testing_refleaks.TestCase
+class CreateDescriptorPoolTest(DescriptorPoolTestBase, unittest.TestCase):
+
+  def setUp(self):
+    self.pool = descriptor_pool.DescriptorPool()
+    self.factory_test1_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        factory_test1_pb2.DESCRIPTOR.serialized_pb)
+    self.factory_test2_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        factory_test2_pb2.DESCRIPTOR.serialized_pb)
+    self.pool.Add(self.factory_test1_fd)
+    self.pool.Add(self.factory_test2_fd)
+
+    self.pool.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_import_public_pb2.DESCRIPTOR.serialized_pb))
+    self.pool.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_import_pb2.DESCRIPTOR.serialized_pb))
+    self.pool.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_pb2.DESCRIPTOR.serialized_pb))
+    self.pool.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        no_package_pb2.DESCRIPTOR.serialized_pb))
+
+
+@testing_refleaks.TestCase
+class SecondaryDescriptorFromDescriptorDB(DescriptorPoolTestBase,
+                                          unittest.TestCase):
+
+  def setUp(self):
+    self.factory_test1_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        factory_test1_pb2.DESCRIPTOR.serialized_pb)
+    self.factory_test2_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        factory_test2_pb2.DESCRIPTOR.serialized_pb)
+    self.db = descriptor_database.DescriptorDatabase()
+    self.db.Add(self.factory_test1_fd)
+    self.db.Add(self.factory_test2_fd)
+    self.db.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_import_public_pb2.DESCRIPTOR.serialized_pb))
+    self.db.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_import_pb2.DESCRIPTOR.serialized_pb))
+    self.db.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        unittest_pb2.DESCRIPTOR.serialized_pb))
+    self.db.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        no_package_pb2.DESCRIPTOR.serialized_pb))
+    self.pool = descriptor_pool.DescriptorPool(descriptor_db=self.db)
+
+  def testErrorCollector(self):
+    file_proto = descriptor_pb2.FileDescriptorProto()
+    file_proto.package = 'collector'
+    file_proto.name = 'error_file'
+    message_type = file_proto.message_type.add()
+    message_type.name = 'ErrorMessage'
+    field = message_type.field.add()
+    field.number = 1
+    field.name = 'nested_message_field'
+    field.label = descriptor.FieldDescriptor.LABEL_OPTIONAL
+    field.type = descriptor.FieldDescriptor.TYPE_MESSAGE
+    field.type_name = 'SubMessage'
+    oneof = message_type.oneof_decl.add()
+    oneof.name = 'MyOneof'
+    enum_type = file_proto.enum_type.add()
+    enum_type.name = 'MyEnum'
+    enum_value = enum_type.value.add()
+    enum_value.name = 'MyEnumValue'
+    enum_value.number = 0
+    self.db.Add(file_proto)
+
+    self.assertRaisesRegexp(KeyError, 'SubMessage',
+                            self.pool.FindMessageTypeByName,
+                            'collector.ErrorMessage')
+    self.assertRaisesRegexp(KeyError, 'SubMessage',
+                            self.pool.FindFileByName, 'error_file')
+    with self.assertRaises(KeyError) as exc:
+      self.pool.FindFileByName('none_file')
+    self.assertIn(str(exc.exception), ('\'none_file\'',
+                                       '\"Couldn\'t find file none_file\"'))
+
+    # Pure python _ConvertFileProtoToFileDescriptor() method has side effect
+    # that all the symbols found in the file will load into the pool even the
+    # file can not build. So when FindMessageTypeByName('ErrorMessage') was
+    # called the first time, a KeyError will be raised but call the find
+    # method later will return a descriptor which is not build.
+    # TODO(jieluo): fix pure python to revert the load if file can not be build
+    if api_implementation.Type() == 'cpp':
+      error_msg = ('Invalid proto descriptor for file "error_file":\\n  '
+                   'collector.ErrorMessage.nested_message_field: "SubMessage" '
+                   'is not defined.\\n  collector.ErrorMessage.MyOneof: Oneof '
+                   'must have at least one field.\\n\'')
+      with self.assertRaises(KeyError) as exc:
+        self.pool.FindMessageTypeByName('collector.ErrorMessage')
+      self.assertEqual(str(exc.exception), '\'Couldn\\\'t build file for '
+                       'message collector.ErrorMessage\\n' + error_msg)
+
+      with self.assertRaises(KeyError) as exc:
+        self.pool.FindFieldByName('collector.ErrorMessage.nested_message_field')
+      self.assertEqual(str(exc.exception), '\'Couldn\\\'t build file for field'
+                       ' collector.ErrorMessage.nested_message_field\\n'
+                       + error_msg)
+
+      with self.assertRaises(KeyError) as exc:
+        self.pool.FindEnumTypeByName('collector.MyEnum')
+      self.assertEqual(str(exc.exception), '\'Couldn\\\'t build file for enum'
+                       ' collector.MyEnum\\n' + error_msg)
+
+      with self.assertRaises(KeyError) as exc:
+        self.pool.FindFileContainingSymbol('collector.MyEnumValue')
+      self.assertEqual(str(exc.exception), '\'Couldn\\\'t build file for symbol'
+                       ' collector.MyEnumValue\\n' + error_msg)
+
+      with self.assertRaises(KeyError) as exc:
+        self.pool.FindOneofByName('collector.ErrorMessage.MyOneof')
+      self.assertEqual(str(exc.exception), '\'Couldn\\\'t build file for oneof'
+                       ' collector.ErrorMessage.MyOneof\\n' + error_msg)
+
+
+class ProtoFile(object):
+
+  def __init__(self, name, package, messages, dependencies=None,
+               public_dependencies=None):
+    self.name = name
+    self.package = package
+    self.messages = messages
+    self.dependencies = dependencies or []
+    self.public_dependencies = public_dependencies or []
+
+  def CheckFile(self, test, pool):
+    file_desc = pool.FindFileByName(self.name)
+    test.assertEqual(self.name, file_desc.name)
+    test.assertEqual(self.package, file_desc.package)
+    dependencies_names = [f.name for f in file_desc.dependencies]
+    test.assertEqual(self.dependencies, dependencies_names)
+    public_dependencies_names = [f.name for f in file_desc.public_dependencies]
+    test.assertEqual(self.public_dependencies, public_dependencies_names)
+    for name, msg_type in self.messages.items():
+      msg_type.CheckType(test, None, name, file_desc)
+
+
+class EnumType(object):
+
+  def __init__(self, values):
+    self.values = values
+
+  def CheckType(self, test, msg_desc, name, file_desc):
+    enum_desc = msg_desc.enum_types_by_name[name]
+    test.assertEqual(name, enum_desc.name)
+    expected_enum_full_name = '.'.join([msg_desc.full_name, name])
+    test.assertEqual(expected_enum_full_name, enum_desc.full_name)
+    test.assertEqual(msg_desc, enum_desc.containing_type)
+    test.assertEqual(file_desc, enum_desc.file)
+    for index, (value, number) in enumerate(self.values):
+      value_desc = enum_desc.values_by_name[value]
+      test.assertEqual(value, value_desc.name)
+      test.assertEqual(index, value_desc.index)
+      test.assertEqual(number, value_desc.number)
+      test.assertEqual(enum_desc, value_desc.type)
+      test.assertIn(value, msg_desc.enum_values_by_name)
+
+
+class MessageType(object):
+
+  def __init__(self, type_dict, field_list, is_extendable=False,
+               extensions=None):
+    self.type_dict = type_dict
+    self.field_list = field_list
+    self.is_extendable = is_extendable
+    self.extensions = extensions or []
+
+  def CheckType(self, test, containing_type_desc, name, file_desc):
+    if containing_type_desc is None:
+      desc = file_desc.message_types_by_name[name]
+      expected_full_name = '.'.join([file_desc.package, name])
+    else:
+      desc = containing_type_desc.nested_types_by_name[name]
+      expected_full_name = '.'.join([containing_type_desc.full_name, name])
+
+    test.assertEqual(name, desc.name)
+    test.assertEqual(expected_full_name, desc.full_name)
+    test.assertEqual(containing_type_desc, desc.containing_type)
+    test.assertEqual(desc.file, file_desc)
+    test.assertEqual(self.is_extendable, desc.is_extendable)
+    for name, subtype in self.type_dict.items():
+      subtype.CheckType(test, desc, name, file_desc)
+
+    for index, (name, field) in enumerate(self.field_list):
+      field.CheckField(test, desc, name, index, file_desc)
+
+    for index, (name, field) in enumerate(self.extensions):
+      field.CheckField(test, desc, name, index, file_desc)
+
+
+class EnumField(object):
+
+  def __init__(self, number, type_name, default_value):
+    self.number = number
+    self.type_name = type_name
+    self.default_value = default_value
+
+  def CheckField(self, test, msg_desc, name, index, file_desc):
+    field_desc = msg_desc.fields_by_name[name]
+    enum_desc = msg_desc.enum_types_by_name[self.type_name]
+    test.assertEqual(name, field_desc.name)
+    expected_field_full_name = '.'.join([msg_desc.full_name, name])
+    test.assertEqual(expected_field_full_name, field_desc.full_name)
+    test.assertEqual(index, field_desc.index)
+    test.assertEqual(self.number, field_desc.number)
+    test.assertEqual(descriptor.FieldDescriptor.TYPE_ENUM, field_desc.type)
+    test.assertEqual(descriptor.FieldDescriptor.CPPTYPE_ENUM,
+                     field_desc.cpp_type)
+    test.assertTrue(field_desc.has_default_value)
+    test.assertEqual(enum_desc.values_by_name[self.default_value].number,
+                     field_desc.default_value)
+    test.assertFalse(enum_desc.values_by_name[self.default_value].has_options)
+    test.assertEqual(msg_desc, field_desc.containing_type)
+    test.assertEqual(enum_desc, field_desc.enum_type)
+    test.assertEqual(file_desc, enum_desc.file)
+
+
+class MessageField(object):
+
+  def __init__(self, number, type_name):
+    self.number = number
+    self.type_name = type_name
+
+  def CheckField(self, test, msg_desc, name, index, file_desc):
+    field_desc = msg_desc.fields_by_name[name]
+    field_type_desc = msg_desc.nested_types_by_name[self.type_name]
+    test.assertEqual(name, field_desc.name)
+    expected_field_full_name = '.'.join([msg_desc.full_name, name])
+    test.assertEqual(expected_field_full_name, field_desc.full_name)
+    test.assertEqual(index, field_desc.index)
+    test.assertEqual(self.number, field_desc.number)
+    test.assertEqual(descriptor.FieldDescriptor.TYPE_MESSAGE, field_desc.type)
+    test.assertEqual(descriptor.FieldDescriptor.CPPTYPE_MESSAGE,
+                     field_desc.cpp_type)
+    test.assertFalse(field_desc.has_default_value)
+    test.assertEqual(msg_desc, field_desc.containing_type)
+    test.assertEqual(field_type_desc, field_desc.message_type)
+    test.assertEqual(file_desc, field_desc.file)
+    test.assertEqual(field_desc.default_value, None)
+
+
+class StringField(object):
+
+  def __init__(self, number, default_value):
+    self.number = number
+    self.default_value = default_value
+
+  def CheckField(self, test, msg_desc, name, index, file_desc):
+    field_desc = msg_desc.fields_by_name[name]
+    test.assertEqual(name, field_desc.name)
+    expected_field_full_name = '.'.join([msg_desc.full_name, name])
+    test.assertEqual(expected_field_full_name, field_desc.full_name)
+    test.assertEqual(index, field_desc.index)
+    test.assertEqual(self.number, field_desc.number)
+    test.assertEqual(descriptor.FieldDescriptor.TYPE_STRING, field_desc.type)
+    test.assertEqual(descriptor.FieldDescriptor.CPPTYPE_STRING,
+                     field_desc.cpp_type)
+    test.assertTrue(field_desc.has_default_value)
+    test.assertEqual(self.default_value, field_desc.default_value)
+    test.assertEqual(file_desc, field_desc.file)
+
+
+class ExtensionField(object):
+
+  def __init__(self, number, extended_type):
+    self.number = number
+    self.extended_type = extended_type
+
+  def CheckField(self, test, msg_desc, name, index, file_desc):
+    field_desc = msg_desc.extensions_by_name[name]
+    test.assertEqual(name, field_desc.name)
+    expected_field_full_name = '.'.join([msg_desc.full_name, name])
+    test.assertEqual(expected_field_full_name, field_desc.full_name)
+    test.assertEqual(self.number, field_desc.number)
+    test.assertEqual(index, field_desc.index)
+    test.assertEqual(descriptor.FieldDescriptor.TYPE_MESSAGE, field_desc.type)
+    test.assertEqual(descriptor.FieldDescriptor.CPPTYPE_MESSAGE,
+                     field_desc.cpp_type)
+    test.assertFalse(field_desc.has_default_value)
+    test.assertTrue(field_desc.is_extension)
+    test.assertEqual(msg_desc, field_desc.extension_scope)
+    test.assertEqual(msg_desc, field_desc.message_type)
+    test.assertEqual(self.extended_type, field_desc.containing_type.name)
+    test.assertEqual(file_desc, field_desc.file)
+
+
+@testing_refleaks.TestCase
+class AddDescriptorTest(unittest.TestCase):
+
+  def _TestMessage(self, prefix):
+    pool = descriptor_pool.DescriptorPool()
+    pool._AddDescriptor(unittest_pb2.TestAllTypes.DESCRIPTOR)
+    self.assertEqual(
+        'protobuf_unittest.TestAllTypes',
+        pool.FindMessageTypeByName(
+            prefix + 'protobuf_unittest.TestAllTypes').full_name)
+
+    # AddDescriptor is not recursive.
+    with self.assertRaises(KeyError):
+      pool.FindMessageTypeByName(
+          prefix + 'protobuf_unittest.TestAllTypes.NestedMessage')
+
+    pool._AddDescriptor(unittest_pb2.TestAllTypes.NestedMessage.DESCRIPTOR)
+    self.assertEqual(
+        'protobuf_unittest.TestAllTypes.NestedMessage',
+        pool.FindMessageTypeByName(
+            prefix + 'protobuf_unittest.TestAllTypes.NestedMessage').full_name)
+
+    # Files are implicitly also indexed when messages are added.
+    self.assertEqual(
+        'google/protobuf/unittest.proto',
+        pool.FindFileByName(
+            'google/protobuf/unittest.proto').name)
+
+    self.assertEqual(
+        'google/protobuf/unittest.proto',
+        pool.FindFileContainingSymbol(
+            prefix + 'protobuf_unittest.TestAllTypes.NestedMessage').name)
+
+  @unittest.skipIf(api_implementation.Type() == 'cpp',
+                   'With the cpp implementation, Add() must be called first')
+  def testMessage(self):
+    self._TestMessage('')
+    self._TestMessage('.')
+
+  def _TestEnum(self, prefix):
+    pool = descriptor_pool.DescriptorPool()
+    if api_implementation.Type() == 'cpp':
+      pool.AddEnumDescriptor(unittest_pb2.ForeignEnum.DESCRIPTOR)
+    else:
+      pool._AddEnumDescriptor(unittest_pb2.ForeignEnum.DESCRIPTOR)
+    self.assertEqual(
+        'protobuf_unittest.ForeignEnum',
+        pool.FindEnumTypeByName(
+            prefix + 'protobuf_unittest.ForeignEnum').full_name)
+
+    # AddEnumDescriptor is not recursive.
+    with self.assertRaises(KeyError):
+      pool.FindEnumTypeByName(
+          prefix + 'protobuf_unittest.ForeignEnum.NestedEnum')
+
+    if api_implementation.Type() == 'cpp':
+      pool.AddEnumDescriptor(unittest_pb2.TestAllTypes.NestedEnum.DESCRIPTOR)
+    else:
+      pool._AddEnumDescriptor(unittest_pb2.TestAllTypes.NestedEnum.DESCRIPTOR)
+    self.assertEqual(
+        'protobuf_unittest.TestAllTypes.NestedEnum',
+        pool.FindEnumTypeByName(
+            prefix + 'protobuf_unittest.TestAllTypes.NestedEnum').full_name)
+
+    # Files are implicitly also indexed when enums are added.
+    self.assertEqual(
+        'google/protobuf/unittest.proto',
+        pool.FindFileByName(
+            'google/protobuf/unittest.proto').name)
+
+    self.assertEqual(
+        'google/protobuf/unittest.proto',
+        pool.FindFileContainingSymbol(
+            prefix + 'protobuf_unittest.TestAllTypes.NestedEnum').name)
+
+  @unittest.skipIf(api_implementation.Type() == 'cpp',
+                   'With the cpp implementation, Add() must be called first')
+  def testEnum(self):
+    self._TestEnum('')
+    self._TestEnum('.')
+
+  @unittest.skipIf(api_implementation.Type() == 'cpp',
+                   'With the cpp implementation, Add() must be called first')
+  def testService(self):
+    pool = descriptor_pool.DescriptorPool()
+    with self.assertRaises(KeyError):
+      pool.FindServiceByName('protobuf_unittest.TestService')
+    pool._AddServiceDescriptor(unittest_pb2._TESTSERVICE)
+    self.assertEqual(
+        'protobuf_unittest.TestService',
+        pool.FindServiceByName('protobuf_unittest.TestService').full_name)
+
+  @unittest.skipIf(api_implementation.Type() == 'cpp',
+                   'With the cpp implementation, Add() must be called first')
+  def testFile(self):
+    pool = descriptor_pool.DescriptorPool()
+    pool._AddFileDescriptor(unittest_pb2.DESCRIPTOR)
+    self.assertEqual(
+        'google/protobuf/unittest.proto',
+        pool.FindFileByName(
+            'google/protobuf/unittest.proto').name)
+
+    # AddFileDescriptor is not recursive; messages and enums within files must
+    # be explicitly registered.
+    with self.assertRaises(KeyError):
+      pool.FindFileContainingSymbol(
+          'protobuf_unittest.TestAllTypes')
+
+  def testEmptyDescriptorPool(self):
+    # Check that an empty DescriptorPool() contains no messages.
+    pool = descriptor_pool.DescriptorPool()
+    proto_file_name = descriptor_pb2.DESCRIPTOR.name
+    self.assertRaises(KeyError, pool.FindFileByName, proto_file_name)
+    # Add the above file to the pool
+    file_descriptor = descriptor_pb2.FileDescriptorProto()
+    descriptor_pb2.DESCRIPTOR.CopyToProto(file_descriptor)
+    pool.Add(file_descriptor)
+    # Now it exists.
+    self.assertTrue(pool.FindFileByName(proto_file_name))
+
+  def testCustomDescriptorPool(self):
+    # Create a new pool, and add a file descriptor.
+    pool = descriptor_pool.DescriptorPool()
+    file_desc = descriptor_pb2.FileDescriptorProto(
+        name='some/file.proto', package='package')
+    file_desc.message_type.add(name='Message')
+    pool.Add(file_desc)
+    self.assertEqual(pool.FindFileByName('some/file.proto').name,
+                     'some/file.proto')
+    self.assertEqual(pool.FindMessageTypeByName('package.Message').name,
+                     'Message')
+    # Test no package
+    file_proto = descriptor_pb2.FileDescriptorProto(
+        name='some/filename/container.proto')
+    message_proto = file_proto.message_type.add(
+        name='TopMessage')
+    message_proto.field.add(
+        name='bb',
+        number=1,
+        type=descriptor_pb2.FieldDescriptorProto.TYPE_INT32,
+        label=descriptor_pb2.FieldDescriptorProto.LABEL_OPTIONAL)
+    enum_proto = file_proto.enum_type.add(name='TopEnum')
+    enum_proto.value.add(name='FOREIGN_FOO', number=4)
+    file_proto.service.add(name='TopService')
+    pool = descriptor_pool.DescriptorPool()
+    pool.Add(file_proto)
+    self.assertEqual('TopMessage',
+                     pool.FindMessageTypeByName('TopMessage').name)
+    self.assertEqual('TopEnum', pool.FindEnumTypeByName('TopEnum').name)
+    self.assertEqual('TopService', pool.FindServiceByName('TopService').name)
+
+  def testFileDescriptorOptionsWithCustomDescriptorPool(self):
+    # Create a descriptor pool, and add a new FileDescriptorProto to it.
+    pool = descriptor_pool.DescriptorPool()
+    file_name = 'file_descriptor_options_with_custom_descriptor_pool.proto'
+    file_descriptor_proto = descriptor_pb2.FileDescriptorProto(name=file_name)
+    extension_id = file_options_test_pb2.foo_options
+    file_descriptor_proto.options.Extensions[extension_id].foo_name = 'foo'
+    pool.Add(file_descriptor_proto)
+    # The options set on the FileDescriptorProto should be available in the
+    # descriptor even if they contain extensions that cannot be deserialized
+    # using the pool.
+    file_descriptor = pool.FindFileByName(file_name)
+    options = file_descriptor.GetOptions()
+    self.assertEqual('foo', options.Extensions[extension_id].foo_name)
+    # The object returned by GetOptions() is cached.
+    self.assertIs(options, file_descriptor.GetOptions())
+
+  def testAddTypeError(self):
+    pool = descriptor_pool.DescriptorPool()
+    if api_implementation.Type() == 'cpp':
+      with self.assertRaises(TypeError):
+        pool.AddDescriptor(0)
+      with self.assertRaises(TypeError):
+        pool.AddEnumDescriptor(0)
+      with self.assertRaises(TypeError):
+        pool.AddServiceDescriptor(0)
+      with self.assertRaises(TypeError):
+        pool.AddExtensionDescriptor(0)
+      with self.assertRaises(TypeError):
+        pool.AddFileDescriptor(0)
+    else:
+      with self.assertRaises(TypeError):
+        pool._AddDescriptor(0)
+      with self.assertRaises(TypeError):
+        pool._AddEnumDescriptor(0)
+      with self.assertRaises(TypeError):
+        pool._AddServiceDescriptor(0)
+      with self.assertRaises(TypeError):
+        pool._AddExtensionDescriptor(0)
+      with self.assertRaises(TypeError):
+        pool._AddFileDescriptor(0)
+
+
+TEST1_FILE = ProtoFile(
+    'google/protobuf/internal/descriptor_pool_test1.proto',
+    'google.protobuf.python.internal',
+    {
+        'DescriptorPoolTest1': MessageType({
+            'NestedEnum': EnumType([('ALPHA', 1), ('BETA', 2)]),
+            'NestedMessage': MessageType({
+                'NestedEnum': EnumType([('EPSILON', 5), ('ZETA', 6)]),
+                'DeepNestedMessage': MessageType({
+                    'NestedEnum': EnumType([('ETA', 7), ('THETA', 8)]),
+                }, [
+                    ('nested_enum', EnumField(1, 'NestedEnum', 'ETA')),
+                    ('nested_field', StringField(2, 'theta')),
+                ]),
+            }, [
+                ('nested_enum', EnumField(1, 'NestedEnum', 'ZETA')),
+                ('nested_field', StringField(2, 'beta')),
+                ('deep_nested_message', MessageField(3, 'DeepNestedMessage')),
+            ])
+        }, [
+            ('nested_enum', EnumField(1, 'NestedEnum', 'BETA')),
+            ('nested_message', MessageField(2, 'NestedMessage')),
+        ], is_extendable=True),
+
+        'DescriptorPoolTest2': MessageType({
+            'NestedEnum': EnumType([('GAMMA', 3), ('DELTA', 4)]),
+            'NestedMessage': MessageType({
+                'NestedEnum': EnumType([('IOTA', 9), ('KAPPA', 10)]),
+                'DeepNestedMessage': MessageType({
+                    'NestedEnum': EnumType([('LAMBDA', 11), ('MU', 12)]),
+                }, [
+                    ('nested_enum', EnumField(1, 'NestedEnum', 'MU')),
+                    ('nested_field', StringField(2, 'lambda')),
+                ]),
+            }, [
+                ('nested_enum', EnumField(1, 'NestedEnum', 'IOTA')),
+                ('nested_field', StringField(2, 'delta')),
+                ('deep_nested_message', MessageField(3, 'DeepNestedMessage')),
+            ])
+        }, [
+            ('nested_enum', EnumField(1, 'NestedEnum', 'GAMMA')),
+            ('nested_message', MessageField(2, 'NestedMessage')),
+        ]),
+    })
+
+
+TEST2_FILE = ProtoFile(
+    'google/protobuf/internal/descriptor_pool_test2.proto',
+    'google.protobuf.python.internal',
+    {
+        'DescriptorPoolTest3': MessageType({
+            'NestedEnum': EnumType([('NU', 13), ('XI', 14)]),
+            'NestedMessage': MessageType({
+                'NestedEnum': EnumType([('OMICRON', 15), ('PI', 16)]),
+                'DeepNestedMessage': MessageType({
+                    'NestedEnum': EnumType([('RHO', 17), ('SIGMA', 18)]),
+                }, [
+                    ('nested_enum', EnumField(1, 'NestedEnum', 'RHO')),
+                    ('nested_field', StringField(2, 'sigma')),
+                ]),
+            }, [
+                ('nested_enum', EnumField(1, 'NestedEnum', 'PI')),
+                ('nested_field', StringField(2, 'nu')),
+                ('deep_nested_message', MessageField(3, 'DeepNestedMessage')),
+            ])
+        }, [
+            ('nested_enum', EnumField(1, 'NestedEnum', 'XI')),
+            ('nested_message', MessageField(2, 'NestedMessage')),
+        ], extensions=[
+            ('descriptor_pool_test',
+             ExtensionField(1001, 'DescriptorPoolTest1')),
+        ]),
+    },
+    dependencies=['google/protobuf/internal/descriptor_pool_test1.proto',
+                  'google/protobuf/internal/more_messages.proto'],
+    public_dependencies=['google/protobuf/internal/more_messages.proto'])
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_pool_test1_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_pool_test1_pb2.py
new file mode 100644
index 0000000..2f56507
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_pool_test1_pb2.py
@@ -0,0 +1,498 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/descriptor_pool_test1.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/descriptor_pool_test1.proto',
+  package='google.protobuf.python.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n4google/protobuf/internal/descriptor_pool_test1.proto\x12\x1fgoogle.protobuf.python.internal\"\xfb\x05\n\x13\x44\x65scriptorPoolTest1\x12Z\n\x0bnested_enum\x18\x01 \x01(\x0e\x32?.google.protobuf.python.internal.DescriptorPoolTest1.NestedEnum:\x04\x42\x45TA\x12Z\n\x0enested_message\x18\x02 \x01(\x0b\x32\x42.google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage\x1a\xfd\x03\n\rNestedMessage\x12h\n\x0bnested_enum\x18\x01 \x01(\x0e\x32M.google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.NestedEnum:\x04ZETA\x12\x1a\n\x0cnested_field\x18\x02 \x01(\t:\x04\x62\x65ta\x12q\n\x13\x64\x65\x65p_nested_message\x18\x03 \x01(\x0b\x32T.google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.DeepNestedMessage\x1a\xcd\x01\n\x11\x44\x65\x65pNestedMessage\x12y\n\x0bnested_enum\x18\x01 \x01(\x0e\x32_.google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.DeepNestedMessage.NestedEnum:\x03\x45TA\x12\x1b\n\x0cnested_field\x18\x02 \x01(\t:\x05theta\" \n\nNestedEnum\x12\x07\n\x03\x45TA\x10\x07\x12\t\n\x05THETA\x10\x08\"#\n\nNestedEnum\x12\x0b\n\x07\x45PSILON\x10\x05\x12\x08\n\x04ZETA\x10\x06\"!\n\nNestedEnum\x12\t\n\x05\x41LPHA\x10\x01\x12\x08\n\x04\x42\x45TA\x10\x02*\t\x08\xe8\x07\x10\x80\x80\x80\x80\x02\"\xf1\x05\n\x13\x44\x65scriptorPoolTest2\x12[\n\x0bnested_enum\x18\x01 \x01(\x0e\x32?.google.protobuf.python.internal.DescriptorPoolTest2.NestedEnum:\x05GAMMA\x12Z\n\x0enested_message\x18\x02 \x01(\x0b\x32\x42.google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage\x1a\xfc\x03\n\rNestedMessage\x12h\n\x0bnested_enum\x18\x01 \x01(\x0e\x32M.google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.NestedEnum:\x04IOTA\x12\x1b\n\x0cnested_field\x18\x02 \x01(\t:\x05\x64\x65lta\x12q\n\x13\x64\x65\x65p_nested_message\x18\x03 \x01(\x0b\x32T.google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.DeepNestedMessage\x1a\xcd\x01\n\x11\x44\x65\x65pNestedMessage\x12x\n\x0bnested_enum\x18\x01 \x01(\x0e\x32_.google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.DeepNestedMessage.NestedEnum:\x02MU\x12\x1c\n\x0cnested_field\x18\x02 \x01(\t:\x06lambda\" \n\nNestedEnum\x12\n\n\x06LAMBDA\x10\x0b\x12\x06\n\x02MU\x10\x0c\"!\n\nNestedEnum\x12\x08\n\x04IOTA\x10\t\x12\t\n\x05KAPPA\x10\n\"\"\n\nNestedEnum\x12\t\n\x05GAMMA\x10\x03\x12\t\n\x05\x44\x45LTA\x10\x04'
+)
+
+
+
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.DeepNestedMessage.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='ETA', index=0, number=7,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='THETA', index=1, number=8,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=738,
+  serialized_end=770,
+)
+_sym_db.RegisterEnumDescriptor(_DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM)
+
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='EPSILON', index=0, number=5,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ZETA', index=1, number=6,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=772,
+  serialized_end=807,
+)
+_sym_db.RegisterEnumDescriptor(_DESCRIPTORPOOLTEST1_NESTEDMESSAGE_NESTEDENUM)
+
+_DESCRIPTORPOOLTEST1_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest1.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='ALPHA', index=0, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BETA', index=1, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=809,
+  serialized_end=842,
+)
+_sym_db.RegisterEnumDescriptor(_DESCRIPTORPOOLTEST1_NESTEDENUM)
+
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.DeepNestedMessage.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='LAMBDA', index=0, number=11,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='MU', index=1, number=12,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=1506,
+  serialized_end=1538,
+)
+_sym_db.RegisterEnumDescriptor(_DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM)
+
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='IOTA', index=0, number=9,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='KAPPA', index=1, number=10,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=1540,
+  serialized_end=1573,
+)
+_sym_db.RegisterEnumDescriptor(_DESCRIPTORPOOLTEST2_NESTEDMESSAGE_NESTEDENUM)
+
+_DESCRIPTORPOOLTEST2_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest2.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='GAMMA', index=0, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='DELTA', index=1, number=4,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=1575,
+  serialized_end=1609,
+)
+_sym_db.RegisterEnumDescriptor(_DESCRIPTORPOOLTEST2_NESTEDENUM)
+
+
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE = _descriptor.Descriptor(
+  name='DeepNestedMessage',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.DeepNestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nested_enum', full_name='google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.DeepNestedMessage.nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=7,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_field', full_name='google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.DeepNestedMessage.nested_field', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"theta".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=565,
+  serialized_end=770,
+)
+
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nested_enum', full_name='google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=6,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_field', full_name='google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.nested_field', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"beta".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='deep_nested_message', full_name='google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.deep_nested_message', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE, ],
+  enum_types=[
+    _DESCRIPTORPOOLTEST1_NESTEDMESSAGE_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=298,
+  serialized_end=807,
+)
+
+_DESCRIPTORPOOLTEST1 = _descriptor.Descriptor(
+  name='DescriptorPoolTest1',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest1',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nested_enum', full_name='google.protobuf.python.internal.DescriptorPoolTest1.nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=2,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_message', full_name='google.protobuf.python.internal.DescriptorPoolTest1.nested_message', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_DESCRIPTORPOOLTEST1_NESTEDMESSAGE, ],
+  enum_types=[
+    _DESCRIPTORPOOLTEST1_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=90,
+  serialized_end=853,
+)
+
+
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE = _descriptor.Descriptor(
+  name='DeepNestedMessage',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.DeepNestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nested_enum', full_name='google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.DeepNestedMessage.nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=12,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_field', full_name='google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.DeepNestedMessage.nested_field', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"lambda".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1333,
+  serialized_end=1538,
+)
+
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nested_enum', full_name='google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=9,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_field', full_name='google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.nested_field', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"delta".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='deep_nested_message', full_name='google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.deep_nested_message', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE, ],
+  enum_types=[
+    _DESCRIPTORPOOLTEST2_NESTEDMESSAGE_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1065,
+  serialized_end=1573,
+)
+
+_DESCRIPTORPOOLTEST2 = _descriptor.Descriptor(
+  name='DescriptorPoolTest2',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nested_enum', full_name='google.protobuf.python.internal.DescriptorPoolTest2.nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=3,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_message', full_name='google.protobuf.python.internal.DescriptorPoolTest2.nested_message', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_DESCRIPTORPOOLTEST2_NESTEDMESSAGE, ],
+  enum_types=[
+    _DESCRIPTORPOOLTEST2_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=856,
+  serialized_end=1609,
+)
+
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE.fields_by_name['nested_enum'].enum_type = _DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE.containing_type = _DESCRIPTORPOOLTEST1_NESTEDMESSAGE
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM.containing_type = _DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE.fields_by_name['nested_enum'].enum_type = _DESCRIPTORPOOLTEST1_NESTEDMESSAGE_NESTEDENUM
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE.fields_by_name['deep_nested_message'].message_type = _DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE.containing_type = _DESCRIPTORPOOLTEST1
+_DESCRIPTORPOOLTEST1_NESTEDMESSAGE_NESTEDENUM.containing_type = _DESCRIPTORPOOLTEST1_NESTEDMESSAGE
+_DESCRIPTORPOOLTEST1.fields_by_name['nested_enum'].enum_type = _DESCRIPTORPOOLTEST1_NESTEDENUM
+_DESCRIPTORPOOLTEST1.fields_by_name['nested_message'].message_type = _DESCRIPTORPOOLTEST1_NESTEDMESSAGE
+_DESCRIPTORPOOLTEST1_NESTEDENUM.containing_type = _DESCRIPTORPOOLTEST1
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE.fields_by_name['nested_enum'].enum_type = _DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE.containing_type = _DESCRIPTORPOOLTEST2_NESTEDMESSAGE
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM.containing_type = _DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE.fields_by_name['nested_enum'].enum_type = _DESCRIPTORPOOLTEST2_NESTEDMESSAGE_NESTEDENUM
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE.fields_by_name['deep_nested_message'].message_type = _DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE.containing_type = _DESCRIPTORPOOLTEST2
+_DESCRIPTORPOOLTEST2_NESTEDMESSAGE_NESTEDENUM.containing_type = _DESCRIPTORPOOLTEST2_NESTEDMESSAGE
+_DESCRIPTORPOOLTEST2.fields_by_name['nested_enum'].enum_type = _DESCRIPTORPOOLTEST2_NESTEDENUM
+_DESCRIPTORPOOLTEST2.fields_by_name['nested_message'].message_type = _DESCRIPTORPOOLTEST2_NESTEDMESSAGE
+_DESCRIPTORPOOLTEST2_NESTEDENUM.containing_type = _DESCRIPTORPOOLTEST2
+DESCRIPTOR.message_types_by_name['DescriptorPoolTest1'] = _DESCRIPTORPOOLTEST1
+DESCRIPTOR.message_types_by_name['DescriptorPoolTest2'] = _DESCRIPTORPOOLTEST2
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+DescriptorPoolTest1 = _reflection.GeneratedProtocolMessageType('DescriptorPoolTest1', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+
+    'DeepNestedMessage' : _reflection.GeneratedProtocolMessageType('DeepNestedMessage', (_message.Message,), {
+      'DESCRIPTOR' : _DESCRIPTORPOOLTEST1_NESTEDMESSAGE_DEEPNESTEDMESSAGE,
+      '__module__' : 'google.protobuf.internal.descriptor_pool_test1_pb2'
+      # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage.DeepNestedMessage)
+      })
+    ,
+    'DESCRIPTOR' : _DESCRIPTORPOOLTEST1_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.internal.descriptor_pool_test1_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.DescriptorPoolTest1.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _DESCRIPTORPOOLTEST1,
+  '__module__' : 'google.protobuf.internal.descriptor_pool_test1_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.DescriptorPoolTest1)
+  })
+_sym_db.RegisterMessage(DescriptorPoolTest1)
+_sym_db.RegisterMessage(DescriptorPoolTest1.NestedMessage)
+_sym_db.RegisterMessage(DescriptorPoolTest1.NestedMessage.DeepNestedMessage)
+
+DescriptorPoolTest2 = _reflection.GeneratedProtocolMessageType('DescriptorPoolTest2', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+
+    'DeepNestedMessage' : _reflection.GeneratedProtocolMessageType('DeepNestedMessage', (_message.Message,), {
+      'DESCRIPTOR' : _DESCRIPTORPOOLTEST2_NESTEDMESSAGE_DEEPNESTEDMESSAGE,
+      '__module__' : 'google.protobuf.internal.descriptor_pool_test1_pb2'
+      # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage.DeepNestedMessage)
+      })
+    ,
+    'DESCRIPTOR' : _DESCRIPTORPOOLTEST2_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.internal.descriptor_pool_test1_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.DescriptorPoolTest2.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _DESCRIPTORPOOLTEST2,
+  '__module__' : 'google.protobuf.internal.descriptor_pool_test1_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.DescriptorPoolTest2)
+  })
+_sym_db.RegisterMessage(DescriptorPoolTest2)
+_sym_db.RegisterMessage(DescriptorPoolTest2.NestedMessage)
+_sym_db.RegisterMessage(DescriptorPoolTest2.NestedMessage.DeepNestedMessage)
+
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_pool_test2_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_pool_test2_pb2.py
new file mode 100644
index 0000000..dd7049b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_pool_test2_pb2.py
@@ -0,0 +1,278 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/descriptor_pool_test2.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf.internal import descriptor_pool_test1_pb2 as google_dot_protobuf_dot_internal_dot_descriptor__pool__test1__pb2
+from google.protobuf.internal import more_messages_pb2 as google_dot_protobuf_dot_internal_dot_more__messages__pb2
+
+from google.protobuf.internal.more_messages_pb2 import *
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/descriptor_pool_test2.proto',
+  package='google.protobuf.python.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n4google/protobuf/internal/descriptor_pool_test2.proto\x12\x1fgoogle.protobuf.python.internal\x1a\x34google/protobuf/internal/descriptor_pool_test1.proto\x1a,google/protobuf/internal/more_messages.proto\"\xef\x06\n\x13\x44\x65scriptorPoolTest3\x12X\n\x0bnested_enum\x18\x01 \x01(\x0e\x32?.google.protobuf.python.internal.DescriptorPoolTest3.NestedEnum:\x02XI\x12Z\n\x0enested_message\x18\x02 \x01(\x0b\x32\x42.google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage\x1a\xf7\x03\n\rNestedMessage\x12\x66\n\x0bnested_enum\x18\x01 \x01(\x0e\x32M.google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.NestedEnum:\x02PI\x12\x18\n\x0cnested_field\x18\x02 \x01(\t:\x02nu\x12q\n\x13\x64\x65\x65p_nested_message\x18\x03 \x01(\x0b\x32T.google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.DeepNestedMessage\x1a\xcd\x01\n\x11\x44\x65\x65pNestedMessage\x12y\n\x0bnested_enum\x18\x01 \x01(\x0e\x32_.google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.DeepNestedMessage.NestedEnum:\x03RHO\x12\x1b\n\x0cnested_field\x18\x02 \x01(\t:\x05sigma\" \n\nNestedEnum\x12\x07\n\x03RHO\x10\x11\x12\t\n\x05SIGMA\x10\x12\"!\n\nNestedEnum\x12\x0b\n\x07OMICRON\x10\x0f\x12\x06\n\x02PI\x10\x10\"\x1c\n\nNestedEnum\x12\x06\n\x02NU\x10\r\x12\x06\n\x02XI\x10\x0e\x32\x89\x01\n\x14\x64\x65scriptor_pool_test\x12\x34.google.protobuf.python.internal.DescriptorPoolTest1\x18\xe9\x07 \x01(\x0b\x32\x34.google.protobuf.python.internal.DescriptorPoolTest3P\x01'
+  ,
+  dependencies=[google_dot_protobuf_dot_internal_dot_descriptor__pool__test1__pb2.DESCRIPTOR,google_dot_protobuf_dot_internal_dot_more__messages__pb2.DESCRIPTOR,],
+  public_dependencies=[google_dot_protobuf_dot_internal_dot_more__messages__pb2.DESCRIPTOR,])
+
+
+
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.DeepNestedMessage.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='RHO', index=0, number=17,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='SIGMA', index=1, number=18,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=832,
+  serialized_end=864,
+)
+_sym_db.RegisterEnumDescriptor(_DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM)
+
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='OMICRON', index=0, number=15,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='PI', index=1, number=16,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=866,
+  serialized_end=899,
+)
+_sym_db.RegisterEnumDescriptor(_DESCRIPTORPOOLTEST3_NESTEDMESSAGE_NESTEDENUM)
+
+_DESCRIPTORPOOLTEST3_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest3.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='NU', index=0, number=13,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='XI', index=1, number=14,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=901,
+  serialized_end=929,
+)
+_sym_db.RegisterEnumDescriptor(_DESCRIPTORPOOLTEST3_NESTEDENUM)
+
+
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE = _descriptor.Descriptor(
+  name='DeepNestedMessage',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.DeepNestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nested_enum', full_name='google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.DeepNestedMessage.nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=17,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_field', full_name='google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.DeepNestedMessage.nested_field', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"sigma".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=659,
+  serialized_end=864,
+)
+
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nested_enum', full_name='google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=16,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_field', full_name='google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.nested_field', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"nu".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='deep_nested_message', full_name='google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.deep_nested_message', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE, ],
+  enum_types=[
+    _DESCRIPTORPOOLTEST3_NESTEDMESSAGE_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=396,
+  serialized_end=899,
+)
+
+_DESCRIPTORPOOLTEST3 = _descriptor.Descriptor(
+  name='DescriptorPoolTest3',
+  full_name='google.protobuf.python.internal.DescriptorPoolTest3',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nested_enum', full_name='google.protobuf.python.internal.DescriptorPoolTest3.nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=14,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_message', full_name='google.protobuf.python.internal.DescriptorPoolTest3.nested_message', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='descriptor_pool_test', full_name='google.protobuf.python.internal.DescriptorPoolTest3.descriptor_pool_test', index=0,
+      number=1001, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[_DESCRIPTORPOOLTEST3_NESTEDMESSAGE, ],
+  enum_types=[
+    _DESCRIPTORPOOLTEST3_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=190,
+  serialized_end=1069,
+)
+
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE.fields_by_name['nested_enum'].enum_type = _DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE.containing_type = _DESCRIPTORPOOLTEST3_NESTEDMESSAGE
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE_NESTEDENUM.containing_type = _DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE.fields_by_name['nested_enum'].enum_type = _DESCRIPTORPOOLTEST3_NESTEDMESSAGE_NESTEDENUM
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE.fields_by_name['deep_nested_message'].message_type = _DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE.containing_type = _DESCRIPTORPOOLTEST3
+_DESCRIPTORPOOLTEST3_NESTEDMESSAGE_NESTEDENUM.containing_type = _DESCRIPTORPOOLTEST3_NESTEDMESSAGE
+_DESCRIPTORPOOLTEST3.fields_by_name['nested_enum'].enum_type = _DESCRIPTORPOOLTEST3_NESTEDENUM
+_DESCRIPTORPOOLTEST3.fields_by_name['nested_message'].message_type = _DESCRIPTORPOOLTEST3_NESTEDMESSAGE
+_DESCRIPTORPOOLTEST3_NESTEDENUM.containing_type = _DESCRIPTORPOOLTEST3
+DESCRIPTOR.message_types_by_name['DescriptorPoolTest3'] = _DESCRIPTORPOOLTEST3
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+DescriptorPoolTest3 = _reflection.GeneratedProtocolMessageType('DescriptorPoolTest3', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+
+    'DeepNestedMessage' : _reflection.GeneratedProtocolMessageType('DeepNestedMessage', (_message.Message,), {
+      'DESCRIPTOR' : _DESCRIPTORPOOLTEST3_NESTEDMESSAGE_DEEPNESTEDMESSAGE,
+      '__module__' : 'google.protobuf.internal.descriptor_pool_test2_pb2'
+      # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage.DeepNestedMessage)
+      })
+    ,
+    'DESCRIPTOR' : _DESCRIPTORPOOLTEST3_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.internal.descriptor_pool_test2_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.DescriptorPoolTest3.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _DESCRIPTORPOOLTEST3,
+  '__module__' : 'google.protobuf.internal.descriptor_pool_test2_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.DescriptorPoolTest3)
+  })
+_sym_db.RegisterMessage(DescriptorPoolTest3)
+_sym_db.RegisterMessage(DescriptorPoolTest3.NestedMessage)
+_sym_db.RegisterMessage(DescriptorPoolTest3.NestedMessage.DeepNestedMessage)
+
+_DESCRIPTORPOOLTEST3.extensions_by_name['descriptor_pool_test'].message_type = _DESCRIPTORPOOLTEST3
+google_dot_protobuf_dot_internal_dot_descriptor__pool__test1__pb2.DescriptorPoolTest1.RegisterExtension(_DESCRIPTORPOOLTEST3.extensions_by_name['descriptor_pool_test'])
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_test.py
new file mode 100644
index 0000000..5e3b0a9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/descriptor_test.py
@@ -0,0 +1,1067 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Unittest for google.protobuf.internal.descriptor."""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+import sys
+import warnings
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import unittest_custom_options_pb2
+from google.protobuf import unittest_import_pb2
+from google.protobuf import unittest_pb2
+from google.protobuf import descriptor_pb2
+from google.protobuf.internal import api_implementation
+from google.protobuf.internal import test_util
+from google.protobuf import descriptor
+from google.protobuf import descriptor_pool
+from google.protobuf import symbol_database
+from google.protobuf import text_format
+
+
+TEST_EMPTY_MESSAGE_DESCRIPTOR_ASCII = """
+name: 'TestEmptyMessage'
+"""
+
+
+warnings.simplefilter('error', DeprecationWarning)
+
+
+class DescriptorTest(unittest.TestCase):
+
+  def setUp(self):
+    file_proto = descriptor_pb2.FileDescriptorProto(
+        name='some/filename/some.proto',
+        package='protobuf_unittest')
+    message_proto = file_proto.message_type.add(
+        name='NestedMessage')
+    message_proto.field.add(
+        name='bb',
+        number=1,
+        type=descriptor_pb2.FieldDescriptorProto.TYPE_INT32,
+        label=descriptor_pb2.FieldDescriptorProto.LABEL_OPTIONAL)
+    enum_proto = message_proto.enum_type.add(
+        name='ForeignEnum')
+    enum_proto.value.add(name='FOREIGN_FOO', number=4)
+    enum_proto.value.add(name='FOREIGN_BAR', number=5)
+    enum_proto.value.add(name='FOREIGN_BAZ', number=6)
+
+    file_proto.message_type.add(name='ResponseMessage')
+    service_proto = file_proto.service.add(
+        name='Service')
+    method_proto = service_proto.method.add(
+        name='CallMethod',
+        input_type='.protobuf_unittest.NestedMessage',
+        output_type='.protobuf_unittest.ResponseMessage')
+
+    # Note: Calling DescriptorPool.Add() multiple times with the same file only
+    # works if the input is canonical; in particular, all type names must be
+    # fully qualified.
+    self.pool = self.GetDescriptorPool()
+    self.pool.Add(file_proto)
+    self.my_file = self.pool.FindFileByName(file_proto.name)
+    self.my_message = self.my_file.message_types_by_name[message_proto.name]
+    self.my_enum = self.my_message.enum_types_by_name[enum_proto.name]
+    self.my_service = self.my_file.services_by_name[service_proto.name]
+    self.my_method = self.my_service.methods_by_name[method_proto.name]
+
+  def GetDescriptorPool(self):
+    return symbol_database.Default().pool
+
+  def testEnumValueName(self):
+    self.assertEqual(self.my_message.EnumValueName('ForeignEnum', 4),
+                     'FOREIGN_FOO')
+
+    self.assertEqual(
+        self.my_message.enum_types_by_name[
+            'ForeignEnum'].values_by_number[4].name,
+        self.my_message.EnumValueName('ForeignEnum', 4))
+    with self.assertRaises(KeyError):
+      self.my_message.EnumValueName('ForeignEnum', 999)
+    with self.assertRaises(KeyError):
+      self.my_message.EnumValueName('NoneEnum', 999)
+    with self.assertRaises(TypeError):
+      self.my_message.EnumValueName()
+
+  def testEnumFixups(self):
+    self.assertEqual(self.my_enum, self.my_enum.values[0].type)
+
+  def testContainingTypeFixups(self):
+    self.assertEqual(self.my_message, self.my_message.fields[0].containing_type)
+    self.assertEqual(self.my_message, self.my_enum.containing_type)
+
+  def testContainingServiceFixups(self):
+    self.assertEqual(self.my_service, self.my_method.containing_service)
+
+  def testGetOptions(self):
+    self.assertEqual(self.my_enum.GetOptions(),
+                     descriptor_pb2.EnumOptions())
+    self.assertEqual(self.my_enum.values[0].GetOptions(),
+                     descriptor_pb2.EnumValueOptions())
+    self.assertEqual(self.my_message.GetOptions(),
+                     descriptor_pb2.MessageOptions())
+    self.assertEqual(self.my_message.fields[0].GetOptions(),
+                     descriptor_pb2.FieldOptions())
+    self.assertEqual(self.my_method.GetOptions(),
+                     descriptor_pb2.MethodOptions())
+    self.assertEqual(self.my_service.GetOptions(),
+                     descriptor_pb2.ServiceOptions())
+
+  def testSimpleCustomOptions(self):
+    file_descriptor = unittest_custom_options_pb2.DESCRIPTOR
+    message_descriptor = (unittest_custom_options_pb2.
+                          TestMessageWithCustomOptions.DESCRIPTOR)
+    field_descriptor = message_descriptor.fields_by_name['field1']
+    oneof_descriptor = message_descriptor.oneofs_by_name['AnOneof']
+    enum_descriptor = message_descriptor.enum_types_by_name['AnEnum']
+    enum_value_descriptor = (message_descriptor.
+                             enum_values_by_name['ANENUM_VAL2'])
+    other_enum_value_descriptor = (message_descriptor.
+                                   enum_values_by_name['ANENUM_VAL1'])
+    service_descriptor = (unittest_custom_options_pb2.
+                          TestServiceWithCustomOptions.DESCRIPTOR)
+    method_descriptor = service_descriptor.FindMethodByName('Foo')
+
+    file_options = file_descriptor.GetOptions()
+    file_opt1 = unittest_custom_options_pb2.file_opt1
+    self.assertEqual(9876543210, file_options.Extensions[file_opt1])
+    message_options = message_descriptor.GetOptions()
+    message_opt1 = unittest_custom_options_pb2.message_opt1
+    self.assertEqual(-56, message_options.Extensions[message_opt1])
+    field_options = field_descriptor.GetOptions()
+    field_opt1 = unittest_custom_options_pb2.field_opt1
+    self.assertEqual(8765432109, field_options.Extensions[field_opt1])
+    field_opt2 = unittest_custom_options_pb2.field_opt2
+    self.assertEqual(42, field_options.Extensions[field_opt2])
+    oneof_options = oneof_descriptor.GetOptions()
+    oneof_opt1 = unittest_custom_options_pb2.oneof_opt1
+    self.assertEqual(-99, oneof_options.Extensions[oneof_opt1])
+    enum_options = enum_descriptor.GetOptions()
+    enum_opt1 = unittest_custom_options_pb2.enum_opt1
+    self.assertEqual(-789, enum_options.Extensions[enum_opt1])
+    enum_value_options = enum_value_descriptor.GetOptions()
+    enum_value_opt1 = unittest_custom_options_pb2.enum_value_opt1
+    self.assertEqual(123, enum_value_options.Extensions[enum_value_opt1])
+
+    service_options = service_descriptor.GetOptions()
+    service_opt1 = unittest_custom_options_pb2.service_opt1
+    self.assertEqual(-9876543210, service_options.Extensions[service_opt1])
+    method_options = method_descriptor.GetOptions()
+    method_opt1 = unittest_custom_options_pb2.method_opt1
+    self.assertEqual(unittest_custom_options_pb2.METHODOPT1_VAL2,
+                     method_options.Extensions[method_opt1])
+
+    message_descriptor = (
+        unittest_custom_options_pb2.DummyMessageContainingEnum.DESCRIPTOR)
+    self.assertTrue(file_descriptor.has_options)
+    self.assertFalse(message_descriptor.has_options)
+    self.assertTrue(field_descriptor.has_options)
+    self.assertTrue(oneof_descriptor.has_options)
+    self.assertTrue(enum_descriptor.has_options)
+    self.assertTrue(enum_value_descriptor.has_options)
+    self.assertFalse(other_enum_value_descriptor.has_options)
+
+  def testCustomOptionsCopyTo(self):
+    message_descriptor = (unittest_custom_options_pb2.
+                          TestMessageWithCustomOptions.DESCRIPTOR)
+    message_proto = descriptor_pb2.DescriptorProto()
+    message_descriptor.CopyToProto(message_proto)
+    self.assertEqual(len(message_proto.options.ListFields()),
+                     2)
+
+  def testDifferentCustomOptionTypes(self):
+    kint32min = -2**31
+    kint64min = -2**63
+    kint32max = 2**31 - 1
+    kint64max = 2**63 - 1
+    kuint32max = 2**32 - 1
+    kuint64max = 2**64 - 1
+
+    message_descriptor =\
+        unittest_custom_options_pb2.CustomOptionMinIntegerValues.DESCRIPTOR
+    message_options = message_descriptor.GetOptions()
+    self.assertEqual(False, message_options.Extensions[
+        unittest_custom_options_pb2.bool_opt])
+    self.assertEqual(kint32min, message_options.Extensions[
+        unittest_custom_options_pb2.int32_opt])
+    self.assertEqual(kint64min, message_options.Extensions[
+        unittest_custom_options_pb2.int64_opt])
+    self.assertEqual(0, message_options.Extensions[
+        unittest_custom_options_pb2.uint32_opt])
+    self.assertEqual(0, message_options.Extensions[
+        unittest_custom_options_pb2.uint64_opt])
+    self.assertEqual(kint32min, message_options.Extensions[
+        unittest_custom_options_pb2.sint32_opt])
+    self.assertEqual(kint64min, message_options.Extensions[
+        unittest_custom_options_pb2.sint64_opt])
+    self.assertEqual(0, message_options.Extensions[
+        unittest_custom_options_pb2.fixed32_opt])
+    self.assertEqual(0, message_options.Extensions[
+        unittest_custom_options_pb2.fixed64_opt])
+    self.assertEqual(kint32min, message_options.Extensions[
+        unittest_custom_options_pb2.sfixed32_opt])
+    self.assertEqual(kint64min, message_options.Extensions[
+        unittest_custom_options_pb2.sfixed64_opt])
+
+    message_descriptor =\
+        unittest_custom_options_pb2.CustomOptionMaxIntegerValues.DESCRIPTOR
+    message_options = message_descriptor.GetOptions()
+    self.assertEqual(True, message_options.Extensions[
+        unittest_custom_options_pb2.bool_opt])
+    self.assertEqual(kint32max, message_options.Extensions[
+        unittest_custom_options_pb2.int32_opt])
+    self.assertEqual(kint64max, message_options.Extensions[
+        unittest_custom_options_pb2.int64_opt])
+    self.assertEqual(kuint32max, message_options.Extensions[
+        unittest_custom_options_pb2.uint32_opt])
+    self.assertEqual(kuint64max, message_options.Extensions[
+        unittest_custom_options_pb2.uint64_opt])
+    self.assertEqual(kint32max, message_options.Extensions[
+        unittest_custom_options_pb2.sint32_opt])
+    self.assertEqual(kint64max, message_options.Extensions[
+        unittest_custom_options_pb2.sint64_opt])
+    self.assertEqual(kuint32max, message_options.Extensions[
+        unittest_custom_options_pb2.fixed32_opt])
+    self.assertEqual(kuint64max, message_options.Extensions[
+        unittest_custom_options_pb2.fixed64_opt])
+    self.assertEqual(kint32max, message_options.Extensions[
+        unittest_custom_options_pb2.sfixed32_opt])
+    self.assertEqual(kint64max, message_options.Extensions[
+        unittest_custom_options_pb2.sfixed64_opt])
+
+    message_descriptor =\
+        unittest_custom_options_pb2.CustomOptionOtherValues.DESCRIPTOR
+    message_options = message_descriptor.GetOptions()
+    self.assertEqual(-100, message_options.Extensions[
+        unittest_custom_options_pb2.int32_opt])
+    self.assertAlmostEqual(12.3456789, message_options.Extensions[
+        unittest_custom_options_pb2.float_opt], 6)
+    self.assertAlmostEqual(1.234567890123456789, message_options.Extensions[
+        unittest_custom_options_pb2.double_opt])
+    self.assertEqual("Hello, \"World\"", message_options.Extensions[
+        unittest_custom_options_pb2.string_opt])
+    self.assertEqual(b"Hello\0World", message_options.Extensions[
+        unittest_custom_options_pb2.bytes_opt])
+    dummy_enum = unittest_custom_options_pb2.DummyMessageContainingEnum
+    self.assertEqual(
+        dummy_enum.TEST_OPTION_ENUM_TYPE2,
+        message_options.Extensions[unittest_custom_options_pb2.enum_opt])
+
+    message_descriptor =\
+        unittest_custom_options_pb2.SettingRealsFromPositiveInts.DESCRIPTOR
+    message_options = message_descriptor.GetOptions()
+    self.assertAlmostEqual(12, message_options.Extensions[
+        unittest_custom_options_pb2.float_opt], 6)
+    self.assertAlmostEqual(154, message_options.Extensions[
+        unittest_custom_options_pb2.double_opt])
+
+    message_descriptor =\
+        unittest_custom_options_pb2.SettingRealsFromNegativeInts.DESCRIPTOR
+    message_options = message_descriptor.GetOptions()
+    self.assertAlmostEqual(-12, message_options.Extensions[
+        unittest_custom_options_pb2.float_opt], 6)
+    self.assertAlmostEqual(-154, message_options.Extensions[
+        unittest_custom_options_pb2.double_opt])
+
+  def testComplexExtensionOptions(self):
+    descriptor =\
+        unittest_custom_options_pb2.VariousComplexOptions.DESCRIPTOR
+    options = descriptor.GetOptions()
+    self.assertEqual(42, options.Extensions[
+        unittest_custom_options_pb2.complex_opt1].foo)
+    self.assertEqual(324, options.Extensions[
+        unittest_custom_options_pb2.complex_opt1].Extensions[
+            unittest_custom_options_pb2.quux])
+    self.assertEqual(876, options.Extensions[
+        unittest_custom_options_pb2.complex_opt1].Extensions[
+            unittest_custom_options_pb2.corge].qux)
+    self.assertEqual(987, options.Extensions[
+        unittest_custom_options_pb2.complex_opt2].baz)
+    self.assertEqual(654, options.Extensions[
+        unittest_custom_options_pb2.complex_opt2].Extensions[
+            unittest_custom_options_pb2.grault])
+    self.assertEqual(743, options.Extensions[
+        unittest_custom_options_pb2.complex_opt2].bar.foo)
+    self.assertEqual(1999, options.Extensions[
+        unittest_custom_options_pb2.complex_opt2].bar.Extensions[
+            unittest_custom_options_pb2.quux])
+    self.assertEqual(2008, options.Extensions[
+        unittest_custom_options_pb2.complex_opt2].bar.Extensions[
+            unittest_custom_options_pb2.corge].qux)
+    self.assertEqual(741, options.Extensions[
+        unittest_custom_options_pb2.complex_opt2].Extensions[
+            unittest_custom_options_pb2.garply].foo)
+    self.assertEqual(1998, options.Extensions[
+        unittest_custom_options_pb2.complex_opt2].Extensions[
+            unittest_custom_options_pb2.garply].Extensions[
+                unittest_custom_options_pb2.quux])
+    self.assertEqual(2121, options.Extensions[
+        unittest_custom_options_pb2.complex_opt2].Extensions[
+            unittest_custom_options_pb2.garply].Extensions[
+                unittest_custom_options_pb2.corge].qux)
+    self.assertEqual(1971, options.Extensions[
+        unittest_custom_options_pb2.ComplexOptionType2
+        .ComplexOptionType4.complex_opt4].waldo)
+    self.assertEqual(321, options.Extensions[
+        unittest_custom_options_pb2.complex_opt2].fred.waldo)
+    self.assertEqual(9, options.Extensions[
+        unittest_custom_options_pb2.complex_opt3].qux)
+    self.assertEqual(22, options.Extensions[
+        unittest_custom_options_pb2.complex_opt3].complexoptiontype5.plugh)
+    self.assertEqual(24, options.Extensions[
+        unittest_custom_options_pb2.complexopt6].xyzzy)
+
+  # Check that aggregate options were parsed and saved correctly in
+  # the appropriate descriptors.
+  def testAggregateOptions(self):
+    file_descriptor = unittest_custom_options_pb2.DESCRIPTOR
+    message_descriptor =\
+        unittest_custom_options_pb2.AggregateMessage.DESCRIPTOR
+    field_descriptor = message_descriptor.fields_by_name["fieldname"]
+    enum_descriptor = unittest_custom_options_pb2.AggregateEnum.DESCRIPTOR
+    enum_value_descriptor = enum_descriptor.values_by_name["VALUE"]
+    service_descriptor =\
+        unittest_custom_options_pb2.AggregateService.DESCRIPTOR
+    method_descriptor = service_descriptor.FindMethodByName("Method")
+
+    # Tests for the different types of data embedded in fileopt
+    file_options = file_descriptor.GetOptions().Extensions[
+        unittest_custom_options_pb2.fileopt]
+    self.assertEqual(100, file_options.i)
+    self.assertEqual("FileAnnotation", file_options.s)
+    self.assertEqual("NestedFileAnnotation", file_options.sub.s)
+    self.assertEqual("FileExtensionAnnotation", file_options.file.Extensions[
+        unittest_custom_options_pb2.fileopt].s)
+    self.assertEqual("EmbeddedMessageSetElement", file_options.mset.Extensions[
+        unittest_custom_options_pb2.AggregateMessageSetElement
+        .message_set_extension].s)
+
+    # Simple tests for all the other types of annotations
+    self.assertEqual(
+        "MessageAnnotation",
+        message_descriptor.GetOptions().Extensions[
+            unittest_custom_options_pb2.msgopt].s)
+    self.assertEqual(
+        "FieldAnnotation",
+        field_descriptor.GetOptions().Extensions[
+            unittest_custom_options_pb2.fieldopt].s)
+    self.assertEqual(
+        "EnumAnnotation",
+        enum_descriptor.GetOptions().Extensions[
+            unittest_custom_options_pb2.enumopt].s)
+    self.assertEqual(
+        "EnumValueAnnotation",
+        enum_value_descriptor.GetOptions().Extensions[
+            unittest_custom_options_pb2.enumvalopt].s)
+    self.assertEqual(
+        "ServiceAnnotation",
+        service_descriptor.GetOptions().Extensions[
+            unittest_custom_options_pb2.serviceopt].s)
+    self.assertEqual(
+        "MethodAnnotation",
+        method_descriptor.GetOptions().Extensions[
+            unittest_custom_options_pb2.methodopt].s)
+
+  def testNestedOptions(self):
+    nested_message =\
+        unittest_custom_options_pb2.NestedOptionType.NestedMessage.DESCRIPTOR
+    self.assertEqual(1001, nested_message.GetOptions().Extensions[
+        unittest_custom_options_pb2.message_opt1])
+    nested_field = nested_message.fields_by_name["nested_field"]
+    self.assertEqual(1002, nested_field.GetOptions().Extensions[
+        unittest_custom_options_pb2.field_opt1])
+    outer_message =\
+        unittest_custom_options_pb2.NestedOptionType.DESCRIPTOR
+    nested_enum = outer_message.enum_types_by_name["NestedEnum"]
+    self.assertEqual(1003, nested_enum.GetOptions().Extensions[
+        unittest_custom_options_pb2.enum_opt1])
+    nested_enum_value = outer_message.enum_values_by_name["NESTED_ENUM_VALUE"]
+    self.assertEqual(1004, nested_enum_value.GetOptions().Extensions[
+        unittest_custom_options_pb2.enum_value_opt1])
+    nested_extension = outer_message.extensions_by_name["nested_extension"]
+    self.assertEqual(1005, nested_extension.GetOptions().Extensions[
+        unittest_custom_options_pb2.field_opt2])
+
+  def testFileDescriptorReferences(self):
+    self.assertEqual(self.my_enum.file, self.my_file)
+    self.assertEqual(self.my_message.file, self.my_file)
+
+  def testFileDescriptor(self):
+    self.assertEqual(self.my_file.name, 'some/filename/some.proto')
+    self.assertEqual(self.my_file.package, 'protobuf_unittest')
+    self.assertEqual(self.my_file.pool, self.pool)
+    self.assertFalse(self.my_file.has_options)
+    self.assertEqual('proto2', self.my_file.syntax)
+    file_proto = descriptor_pb2.FileDescriptorProto()
+    self.my_file.CopyToProto(file_proto)
+    self.assertEqual(self.my_file.serialized_pb,
+                     file_proto.SerializeToString())
+    # Generated modules also belong to the default pool.
+    self.assertEqual(unittest_pb2.DESCRIPTOR.pool, descriptor_pool.Default())
+
+  @unittest.skipIf(
+      api_implementation.Type() != 'cpp' or api_implementation.Version() != 2,
+      'Immutability of descriptors is only enforced in v2 implementation')
+  def testImmutableCppDescriptor(self):
+    file_descriptor = unittest_pb2.DESCRIPTOR
+    message_descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
+    field_descriptor = message_descriptor.fields_by_name['optional_int32']
+    enum_descriptor = message_descriptor.enum_types_by_name['NestedEnum']
+    oneof_descriptor = message_descriptor.oneofs_by_name['oneof_field']
+    with self.assertRaises(AttributeError):
+      message_descriptor.fields_by_name = None
+    with self.assertRaises(TypeError):
+      message_descriptor.fields_by_name['Another'] = None
+    with self.assertRaises(TypeError):
+      message_descriptor.fields.append(None)
+    with self.assertRaises(AttributeError):
+      field_descriptor.containing_type = message_descriptor
+    with self.assertRaises(AttributeError):
+      file_descriptor.has_options = False
+    with self.assertRaises(AttributeError):
+      field_descriptor.has_options = False
+    with self.assertRaises(AttributeError):
+      oneof_descriptor.has_options = False
+    with self.assertRaises(AttributeError):
+      enum_descriptor.has_options = False
+    with self.assertRaises(AttributeError) as e:
+      message_descriptor.has_options = True
+    self.assertEqual('attribute is not writable: has_options',
+                     str(e.exception))
+
+  def testDefault(self):
+    message_descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
+    field = message_descriptor.fields_by_name['repeated_int32']
+    self.assertEqual(field.default_value, [])
+    field = message_descriptor.fields_by_name['repeated_nested_message']
+    self.assertEqual(field.default_value, [])
+    field = message_descriptor.fields_by_name['optionalgroup']
+    self.assertEqual(field.default_value, None)
+    field = message_descriptor.fields_by_name['optional_nested_message']
+    self.assertEqual(field.default_value, None)
+
+
+class NewDescriptorTest(DescriptorTest):
+  """Redo the same tests as above, but with a separate DescriptorPool."""
+
+  def GetDescriptorPool(self):
+    return descriptor_pool.DescriptorPool()
+
+
+class GeneratedDescriptorTest(unittest.TestCase):
+  """Tests for the properties of descriptors in generated code."""
+
+  def CheckMessageDescriptor(self, message_descriptor):
+    # Basic properties
+    self.assertEqual(message_descriptor.name, 'TestAllTypes')
+    self.assertEqual(message_descriptor.full_name,
+                     'protobuf_unittest.TestAllTypes')
+    # Test equality and hashability
+    self.assertEqual(message_descriptor, message_descriptor)
+    self.assertEqual(message_descriptor.fields[0].containing_type,
+                     message_descriptor)
+    self.assertIn(message_descriptor, [message_descriptor])
+    self.assertIn(message_descriptor, {message_descriptor: None})
+    # Test field containers
+    self.CheckDescriptorSequence(message_descriptor.fields)
+    self.CheckDescriptorMapping(message_descriptor.fields_by_name)
+    self.CheckDescriptorMapping(message_descriptor.fields_by_number)
+    self.CheckDescriptorMapping(message_descriptor.fields_by_camelcase_name)
+    self.CheckDescriptorMapping(message_descriptor.enum_types_by_name)
+    self.CheckDescriptorMapping(message_descriptor.enum_values_by_name)
+    self.CheckDescriptorMapping(message_descriptor.oneofs_by_name)
+    self.CheckDescriptorMapping(message_descriptor.enum_types[0].values_by_name)
+    # Test extension range
+    self.assertEqual(message_descriptor.extension_ranges, [])
+
+  def CheckFieldDescriptor(self, field_descriptor):
+    # Basic properties
+    self.assertEqual(field_descriptor.name, 'optional_int32')
+    self.assertEqual(field_descriptor.camelcase_name, 'optionalInt32')
+    self.assertEqual(field_descriptor.full_name,
+                     'protobuf_unittest.TestAllTypes.optional_int32')
+    self.assertEqual(field_descriptor.containing_type.name, 'TestAllTypes')
+    self.assertEqual(field_descriptor.file, unittest_pb2.DESCRIPTOR)
+    # Test equality and hashability
+    self.assertEqual(field_descriptor, field_descriptor)
+    self.assertEqual(
+        field_descriptor.containing_type.fields_by_name['optional_int32'],
+        field_descriptor)
+    self.assertEqual(
+        field_descriptor.containing_type.fields_by_camelcase_name[
+            'optionalInt32'],
+        field_descriptor)
+    self.assertIn(field_descriptor, [field_descriptor])
+    self.assertIn(field_descriptor, {field_descriptor: None})
+    self.assertEqual(None, field_descriptor.extension_scope)
+    self.assertEqual(None, field_descriptor.enum_type)
+    if api_implementation.Type() == 'cpp':
+      # For test coverage only
+      self.assertEqual(field_descriptor.id, field_descriptor.id)
+
+  def CheckDescriptorSequence(self, sequence):
+    # Verifies that a property like 'messageDescriptor.fields' has all the
+    # properties of an immutable abc.Sequence.
+    self.assertNotEqual(sequence,
+                        unittest_pb2.TestAllExtensions.DESCRIPTOR.fields)
+    self.assertNotEqual(sequence, [])
+    self.assertNotEqual(sequence, 1)
+    self.assertFalse(sequence == 1)  # Only for cpp test coverage
+    self.assertEqual(sequence, sequence)
+    expected_list = list(sequence)
+    self.assertEqual(expected_list, sequence)
+    self.assertGreater(len(sequence), 0)  # Sized
+    self.assertEqual(len(sequence), len(expected_list))  # Iterable
+    self.assertEqual(sequence[len(sequence) -1], sequence[-1])
+    item = sequence[0]
+    self.assertEqual(item, sequence[0])
+    self.assertIn(item, sequence)  # Container
+    self.assertEqual(sequence.index(item), 0)
+    self.assertEqual(sequence.count(item), 1)
+    other_item = unittest_pb2.NestedTestAllTypes.DESCRIPTOR.fields[0]
+    self.assertNotIn(other_item, sequence)
+    self.assertEqual(sequence.count(other_item), 0)
+    self.assertRaises(ValueError, sequence.index, other_item)
+    self.assertRaises(ValueError, sequence.index, [])
+    reversed_iterator = reversed(sequence)
+    self.assertEqual(list(reversed_iterator), list(sequence)[::-1])
+    self.assertRaises(StopIteration, next, reversed_iterator)
+    expected_list[0] = 'change value'
+    self.assertNotEqual(expected_list, sequence)
+    # TODO(jieluo): Change __repr__ support for DescriptorSequence.
+    if api_implementation.Type() == 'python':
+      self.assertEqual(str(list(sequence)), str(sequence))
+    else:
+      self.assertEqual(str(sequence)[0], '<')
+
+  def CheckDescriptorMapping(self, mapping):
+    # Verifies that a property like 'messageDescriptor.fields' has all the
+    # properties of an immutable abc.Mapping.
+    self.assertNotEqual(
+        mapping, unittest_pb2.TestAllExtensions.DESCRIPTOR.fields_by_name)
+    self.assertNotEqual(mapping, {})
+    self.assertNotEqual(mapping, 1)
+    self.assertFalse(mapping == 1)  # Only for cpp test coverage
+    excepted_dict = dict(mapping.items())
+    self.assertEqual(mapping, excepted_dict)
+    self.assertEqual(mapping, mapping)
+    self.assertGreater(len(mapping), 0)  # Sized
+    self.assertEqual(len(mapping), len(excepted_dict))  # Iterable
+    if sys.version_info >= (3,):
+      key, item = next(iter(mapping.items()))
+    else:
+      key, item = mapping.items()[0]
+    self.assertIn(key, mapping)  # Container
+    self.assertEqual(mapping.get(key), item)
+    with self.assertRaises(TypeError):
+      mapping.get()
+    # TODO(jieluo): Fix python and cpp extension diff.
+    if api_implementation.Type() == 'python':
+      self.assertRaises(TypeError, mapping.get, [])
+    else:
+      self.assertEqual(None, mapping.get([]))
+    # keys(), iterkeys() &co
+    item = (next(iter(mapping.keys())), next(iter(mapping.values())))
+    self.assertEqual(item, next(iter(mapping.items())))
+    if sys.version_info < (3,):
+      def CheckItems(seq, iterator):
+        self.assertEqual(next(iterator), seq[0])
+        self.assertEqual(list(iterator), seq[1:])
+      CheckItems(mapping.keys(), mapping.iterkeys())
+      CheckItems(mapping.values(), mapping.itervalues())
+      CheckItems(mapping.items(), mapping.iteritems())
+    excepted_dict[key] = 'change value'
+    self.assertNotEqual(mapping, excepted_dict)
+    del excepted_dict[key]
+    excepted_dict['new_key'] = 'new'
+    self.assertNotEqual(mapping, excepted_dict)
+    self.assertRaises(KeyError, mapping.__getitem__, 'key_error')
+    self.assertRaises(KeyError, mapping.__getitem__, len(mapping) + 1)
+    # TODO(jieluo): Add __repr__ support for DescriptorMapping.
+    if api_implementation.Type() == 'python':
+      self.assertEqual(len(str(dict(mapping.items()))), len(str(mapping)))
+    else:
+      self.assertEqual(str(mapping)[0], '<')
+
+  def testDescriptor(self):
+    message_descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
+    self.CheckMessageDescriptor(message_descriptor)
+    field_descriptor = message_descriptor.fields_by_name['optional_int32']
+    self.CheckFieldDescriptor(field_descriptor)
+    field_descriptor = message_descriptor.fields_by_camelcase_name[
+        'optionalInt32']
+    self.CheckFieldDescriptor(field_descriptor)
+    enum_descriptor = unittest_pb2.DESCRIPTOR.enum_types_by_name[
+        'ForeignEnum']
+    self.assertEqual(None, enum_descriptor.containing_type)
+    # Test extension range
+    self.assertEqual(
+        unittest_pb2.TestAllExtensions.DESCRIPTOR.extension_ranges,
+        [(1, 536870912)])
+    self.assertEqual(
+        unittest_pb2.TestMultipleExtensionRanges.DESCRIPTOR.extension_ranges,
+        [(42, 43), (4143, 4244), (65536, 536870912)])
+
+  def testCppDescriptorContainer(self):
+    containing_file = unittest_pb2.DESCRIPTOR
+    self.CheckDescriptorSequence(containing_file.dependencies)
+    self.CheckDescriptorMapping(containing_file.message_types_by_name)
+    self.CheckDescriptorMapping(containing_file.enum_types_by_name)
+    self.CheckDescriptorMapping(containing_file.services_by_name)
+    self.CheckDescriptorMapping(containing_file.extensions_by_name)
+    self.CheckDescriptorMapping(
+        unittest_pb2.TestNestedExtension.DESCRIPTOR.extensions_by_name)
+
+  def testCppDescriptorContainer_Iterator(self):
+    # Same test with the iterator
+    enum = unittest_pb2.TestAllTypes.DESCRIPTOR.enum_types_by_name['NestedEnum']
+    values_iter = iter(enum.values)
+    del enum
+    self.assertEqual('FOO', next(values_iter).name)
+
+  def testDescriptorNestedTypesContainer(self):
+    message_descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
+    nested_message_descriptor = unittest_pb2.TestAllTypes.NestedMessage.DESCRIPTOR
+    self.assertEqual(len(message_descriptor.nested_types), 3)
+    self.assertFalse(None in message_descriptor.nested_types)
+    self.assertTrue(
+        nested_message_descriptor in message_descriptor.nested_types)
+
+  def testServiceDescriptor(self):
+    service_descriptor = unittest_pb2.DESCRIPTOR.services_by_name['TestService']
+    self.assertEqual(service_descriptor.name, 'TestService')
+    self.assertEqual(service_descriptor.methods[0].name, 'Foo')
+    self.assertIs(service_descriptor.file, unittest_pb2.DESCRIPTOR)
+    self.assertEqual(service_descriptor.index, 0)
+    self.CheckDescriptorMapping(service_descriptor.methods_by_name)
+
+  def testOneofDescriptor(self):
+    message_descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
+    oneof_descriptor = message_descriptor.oneofs_by_name['oneof_field']
+    self.assertFalse(oneof_descriptor.has_options)
+    self.assertEqual(message_descriptor, oneof_descriptor.containing_type)
+    self.assertEqual('oneof_field', oneof_descriptor.name)
+    self.assertEqual('protobuf_unittest.TestAllTypes.oneof_field',
+                     oneof_descriptor.full_name)
+    self.assertEqual(0, oneof_descriptor.index)
+
+
+class DescriptorCopyToProtoTest(unittest.TestCase):
+  """Tests for CopyTo functions of Descriptor."""
+
+  def _AssertProtoEqual(self, actual_proto, expected_class, expected_ascii):
+    expected_proto = expected_class()
+    text_format.Merge(expected_ascii, expected_proto)
+
+    self.assertEqual(
+        actual_proto, expected_proto,
+        'Not equal,\nActual:\n%s\nExpected:\n%s\n'
+        % (str(actual_proto), str(expected_proto)))
+
+  def _InternalTestCopyToProto(self, desc, expected_proto_class,
+                               expected_proto_ascii):
+    actual = expected_proto_class()
+    desc.CopyToProto(actual)
+    self._AssertProtoEqual(
+        actual, expected_proto_class, expected_proto_ascii)
+
+  def testCopyToProto_EmptyMessage(self):
+    self._InternalTestCopyToProto(
+        unittest_pb2.TestEmptyMessage.DESCRIPTOR,
+        descriptor_pb2.DescriptorProto,
+        TEST_EMPTY_MESSAGE_DESCRIPTOR_ASCII)
+
+  def testCopyToProto_NestedMessage(self):
+    TEST_NESTED_MESSAGE_ASCII = """
+      name: 'NestedMessage'
+      field: <
+        name: 'bb'
+        number: 1
+        label: 1  # Optional
+        type: 5  # TYPE_INT32
+      >
+      """
+
+    self._InternalTestCopyToProto(
+        unittest_pb2.TestAllTypes.NestedMessage.DESCRIPTOR,
+        descriptor_pb2.DescriptorProto,
+        TEST_NESTED_MESSAGE_ASCII)
+
+  def testCopyToProto_ForeignNestedMessage(self):
+    TEST_FOREIGN_NESTED_ASCII = """
+      name: 'TestForeignNested'
+      field: <
+        name: 'foreign_nested'
+        number: 1
+        label: 1  # Optional
+        type: 11  # TYPE_MESSAGE
+        type_name: '.protobuf_unittest.TestAllTypes.NestedMessage'
+      >
+      """
+
+    self._InternalTestCopyToProto(
+        unittest_pb2.TestForeignNested.DESCRIPTOR,
+        descriptor_pb2.DescriptorProto,
+        TEST_FOREIGN_NESTED_ASCII)
+
+  def testCopyToProto_ForeignEnum(self):
+    TEST_FOREIGN_ENUM_ASCII = """
+      name: 'ForeignEnum'
+      value: <
+        name: 'FOREIGN_FOO'
+        number: 4
+      >
+      value: <
+        name: 'FOREIGN_BAR'
+        number: 5
+      >
+      value: <
+        name: 'FOREIGN_BAZ'
+        number: 6
+      >
+      """
+
+    self._InternalTestCopyToProto(
+        unittest_pb2.ForeignEnum.DESCRIPTOR,
+        descriptor_pb2.EnumDescriptorProto,
+        TEST_FOREIGN_ENUM_ASCII)
+
+  def testCopyToProto_Options(self):
+    TEST_DEPRECATED_FIELDS_ASCII = """
+      name: 'TestDeprecatedFields'
+      field: <
+        name: 'deprecated_int32'
+        number: 1
+        label: 1  # Optional
+        type: 5  # TYPE_INT32
+        options: <
+          deprecated: true
+        >
+      >
+      field {
+        name: "deprecated_int32_in_oneof"
+        number: 2
+        label: LABEL_OPTIONAL
+        type: TYPE_INT32
+        options {
+          deprecated: true
+        }
+        oneof_index: 0
+      }
+      oneof_decl {
+        name: "oneof_fields"
+      }
+      """
+
+    self._InternalTestCopyToProto(
+        unittest_pb2.TestDeprecatedFields.DESCRIPTOR,
+        descriptor_pb2.DescriptorProto,
+        TEST_DEPRECATED_FIELDS_ASCII)
+
+  def testCopyToProto_AllExtensions(self):
+    TEST_EMPTY_MESSAGE_WITH_EXTENSIONS_ASCII = """
+      name: 'TestEmptyMessageWithExtensions'
+      extension_range: <
+        start: 1
+        end: 536870912
+      >
+      """
+
+    self._InternalTestCopyToProto(
+        unittest_pb2.TestEmptyMessageWithExtensions.DESCRIPTOR,
+        descriptor_pb2.DescriptorProto,
+        TEST_EMPTY_MESSAGE_WITH_EXTENSIONS_ASCII)
+
+  def testCopyToProto_SeveralExtensions(self):
+    TEST_MESSAGE_WITH_SEVERAL_EXTENSIONS_ASCII = """
+      name: 'TestMultipleExtensionRanges'
+      extension_range: <
+        start: 42
+        end: 43
+      >
+      extension_range: <
+        start: 4143
+        end: 4244
+      >
+      extension_range: <
+        start: 65536
+        end: 536870912
+      >
+      """
+
+    self._InternalTestCopyToProto(
+        unittest_pb2.TestMultipleExtensionRanges.DESCRIPTOR,
+        descriptor_pb2.DescriptorProto,
+        TEST_MESSAGE_WITH_SEVERAL_EXTENSIONS_ASCII)
+
+  def testCopyToProto_FileDescriptor(self):
+    UNITTEST_IMPORT_FILE_DESCRIPTOR_ASCII = ("""
+      name: 'google/protobuf/unittest_import.proto'
+      package: 'protobuf_unittest_import'
+      dependency: 'google/protobuf/unittest_import_public.proto'
+      message_type: <
+        name: 'ImportMessage'
+        field: <
+          name: 'd'
+          number: 1
+          label: 1  # Optional
+          type: 5  # TYPE_INT32
+        >
+      >
+      """ +
+      """enum_type: <
+        name: 'ImportEnum'
+        value: <
+          name: 'IMPORT_FOO'
+          number: 7
+        >
+        value: <
+          name: 'IMPORT_BAR'
+          number: 8
+        >
+        value: <
+          name: 'IMPORT_BAZ'
+          number: 9
+        >
+      >
+      enum_type: <
+        name: 'ImportEnumForMap'
+        value: <
+          name: 'UNKNOWN'
+          number: 0
+        >
+        value: <
+          name: 'FOO'
+          number: 1
+        >
+        value: <
+          name: 'BAR'
+          number: 2
+        >
+      >
+      options: <
+        java_package: 'com.google.protobuf.test'
+        optimize_for: 1  # SPEED
+      """ +
+      """
+        cc_enable_arenas: true
+      >
+      public_dependency: 0
+    """)
+    self._InternalTestCopyToProto(
+        unittest_import_pb2.DESCRIPTOR,
+        descriptor_pb2.FileDescriptorProto,
+        UNITTEST_IMPORT_FILE_DESCRIPTOR_ASCII)
+
+  def testCopyToProto_ServiceDescriptor(self):
+    TEST_SERVICE_ASCII = """
+      name: 'TestService'
+      method: <
+        name: 'Foo'
+        input_type: '.protobuf_unittest.FooRequest'
+        output_type: '.protobuf_unittest.FooResponse'
+      >
+      method: <
+        name: 'Bar'
+        input_type: '.protobuf_unittest.BarRequest'
+        output_type: '.protobuf_unittest.BarResponse'
+      >
+      """
+    self._InternalTestCopyToProto(
+        unittest_pb2.TestService.DESCRIPTOR,
+        descriptor_pb2.ServiceDescriptorProto,
+        TEST_SERVICE_ASCII)
+
+  @unittest.skipIf(
+      api_implementation.Type() == 'python',
+      'It is not implemented in python.')
+  # TODO(jieluo): Add support for pure python or remove in c extension.
+  def testCopyToProto_MethodDescriptor(self):
+    expected_ascii = """
+      name: 'Foo'
+      input_type: '.protobuf_unittest.FooRequest'
+      output_type: '.protobuf_unittest.FooResponse'
+    """
+    method_descriptor = unittest_pb2.TestService.DESCRIPTOR.FindMethodByName(
+        'Foo')
+    self._InternalTestCopyToProto(
+        method_descriptor,
+        descriptor_pb2.MethodDescriptorProto,
+        expected_ascii)
+
+  @unittest.skipIf(
+      api_implementation.Type() == 'python',
+      'Pure python does not raise error.')
+  # TODO(jieluo): Fix pure python to check with the proto type.
+  def testCopyToProto_TypeError(self):
+    file_proto = descriptor_pb2.FileDescriptorProto()
+    self.assertRaises(TypeError,
+                      unittest_pb2.TestEmptyMessage.DESCRIPTOR.CopyToProto,
+                      file_proto)
+    self.assertRaises(TypeError,
+                      unittest_pb2.ForeignEnum.DESCRIPTOR.CopyToProto,
+                      file_proto)
+    self.assertRaises(TypeError,
+                      unittest_pb2.TestService.DESCRIPTOR.CopyToProto,
+                      file_proto)
+    proto = descriptor_pb2.DescriptorProto()
+    self.assertRaises(TypeError,
+                      unittest_import_pb2.DESCRIPTOR.CopyToProto,
+                      proto)
+
+
+class MakeDescriptorTest(unittest.TestCase):
+
+  def testMakeDescriptorWithNestedFields(self):
+    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
+    file_descriptor_proto.name = 'Foo2'
+    message_type = file_descriptor_proto.message_type.add()
+    message_type.name = file_descriptor_proto.name
+    nested_type = message_type.nested_type.add()
+    nested_type.name = 'Sub'
+    enum_type = nested_type.enum_type.add()
+    enum_type.name = 'FOO'
+    enum_type_val = enum_type.value.add()
+    enum_type_val.name = 'BAR'
+    enum_type_val.number = 3
+    field = message_type.field.add()
+    field.number = 1
+    field.name = 'uint64_field'
+    field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
+    field.type = descriptor.FieldDescriptor.TYPE_UINT64
+    field = message_type.field.add()
+    field.number = 2
+    field.name = 'nested_message_field'
+    field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
+    field.type = descriptor.FieldDescriptor.TYPE_MESSAGE
+    field.type_name = 'Sub'
+    enum_field = nested_type.field.add()
+    enum_field.number = 2
+    enum_field.name = 'bar_field'
+    enum_field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
+    enum_field.type = descriptor.FieldDescriptor.TYPE_ENUM
+    enum_field.type_name = 'Foo2.Sub.FOO'
+
+    result = descriptor.MakeDescriptor(message_type)
+    self.assertEqual(result.fields[0].cpp_type,
+                     descriptor.FieldDescriptor.CPPTYPE_UINT64)
+    self.assertEqual(result.fields[1].cpp_type,
+                     descriptor.FieldDescriptor.CPPTYPE_MESSAGE)
+    self.assertEqual(result.fields[1].message_type.containing_type,
+                     result)
+    self.assertEqual(result.nested_types[0].fields[0].full_name,
+                     'Foo2.Sub.bar_field')
+    self.assertEqual(result.nested_types[0].fields[0].enum_type,
+                     result.nested_types[0].enum_types[0])
+    self.assertFalse(result.has_options)
+    self.assertFalse(result.fields[0].has_options)
+    if api_implementation.Type() == 'cpp':
+      with self.assertRaises(AttributeError):
+        result.fields[0].has_options = False
+
+  def testMakeDescriptorWithUnsignedIntField(self):
+    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
+    file_descriptor_proto.name = 'Foo'
+    message_type = file_descriptor_proto.message_type.add()
+    message_type.name = file_descriptor_proto.name
+    enum_type = message_type.enum_type.add()
+    enum_type.name = 'FOO'
+    enum_type_val = enum_type.value.add()
+    enum_type_val.name = 'BAR'
+    enum_type_val.number = 3
+    field = message_type.field.add()
+    field.number = 1
+    field.name = 'uint64_field'
+    field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
+    field.type = descriptor.FieldDescriptor.TYPE_UINT64
+    enum_field = message_type.field.add()
+    enum_field.number = 2
+    enum_field.name = 'bar_field'
+    enum_field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
+    enum_field.type = descriptor.FieldDescriptor.TYPE_ENUM
+    enum_field.type_name = 'Foo.FOO'
+
+    result = descriptor.MakeDescriptor(message_type)
+    self.assertEqual(result.fields[0].cpp_type,
+                     descriptor.FieldDescriptor.CPPTYPE_UINT64)
+
+
+  def testMakeDescriptorWithOptions(self):
+    descriptor_proto = descriptor_pb2.DescriptorProto()
+    aggregate_message = unittest_custom_options_pb2.AggregateMessage
+    aggregate_message.DESCRIPTOR.CopyToProto(descriptor_proto)
+    reformed_descriptor = descriptor.MakeDescriptor(descriptor_proto)
+
+    options = reformed_descriptor.GetOptions()
+    self.assertEqual(101,
+                      options.Extensions[unittest_custom_options_pb2.msgopt].i)
+
+  def testCamelcaseName(self):
+    descriptor_proto = descriptor_pb2.DescriptorProto()
+    descriptor_proto.name = 'Bar'
+    names = ['foo_foo', 'FooBar', 'fooBaz', 'fooFoo', 'foobar']
+    camelcase_names = ['fooFoo', 'fooBar', 'fooBaz', 'fooFoo', 'foobar']
+    for index in range(len(names)):
+      field = descriptor_proto.field.add()
+      field.number = index + 1
+      field.name = names[index]
+    result = descriptor.MakeDescriptor(descriptor_proto)
+    for index in range(len(camelcase_names)):
+      self.assertEqual(result.fields[index].camelcase_name,
+                       camelcase_names[index])
+
+  def testJsonName(self):
+    descriptor_proto = descriptor_pb2.DescriptorProto()
+    descriptor_proto.name = 'TestJsonName'
+    names = ['field_name', 'fieldName', 'FieldName',
+             '_field_name', 'FIELD_NAME', 'json_name']
+    json_names = ['fieldName', 'fieldName', 'FieldName',
+                  'FieldName', 'FIELDNAME', '@type']
+    for index in range(len(names)):
+      field = descriptor_proto.field.add()
+      field.number = index + 1
+      field.name = names[index]
+    field.json_name = '@type'
+    result = descriptor.MakeDescriptor(descriptor_proto)
+    for index in range(len(json_names)):
+      self.assertEqual(result.fields[index].json_name,
+                       json_names[index])
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/encoder.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/encoder.py
new file mode 100644
index 0000000..0c016f3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/encoder.py
@@ -0,0 +1,830 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Code for encoding protocol message primitives.
+
+Contains the logic for encoding every logical protocol field type
+into one of the 5 physical wire types.
+
+This code is designed to push the Python interpreter's performance to the
+limits.
+
+The basic idea is that at startup time, for every field (i.e. every
+FieldDescriptor) we construct two functions:  a "sizer" and an "encoder".  The
+sizer takes a value of this field's type and computes its byte size.  The
+encoder takes a writer function and a value.  It encodes the value into byte
+strings and invokes the writer function to write those strings.  Typically the
+writer function is the write() method of a BytesIO.
+
+We try to do as much work as possible when constructing the writer and the
+sizer rather than when calling them.  In particular:
+* We copy any needed global functions to local variables, so that we do not need
+  to do costly global table lookups at runtime.
+* Similarly, we try to do any attribute lookups at startup time if possible.
+* Every field's tag is encoded to bytes at startup, since it can't change at
+  runtime.
+* Whatever component of the field size we can compute at startup, we do.
+* We *avoid* sharing code if doing so would make the code slower and not sharing
+  does not burden us too much.  For example, encoders for repeated fields do
+  not just call the encoders for singular fields in a loop because this would
+  add an extra function call overhead for every loop iteration; instead, we
+  manually inline the single-value encoder into the loop.
+* If a Python function lacks a return statement, Python actually generates
+  instructions to pop the result of the last statement off the stack, push
+  None onto the stack, and then return that.  If we really don't care what
+  value is returned, then we can save two instructions by returning the
+  result of the last statement.  It looks funny but it helps.
+* We assume that type and bounds checking has happened at a higher level.
+"""
+
+__author__ = 'kenton@google.com (Kenton Varda)'
+
+import struct
+
+import six
+
+from google.protobuf.internal import wire_format
+
+
+# This will overflow and thus become IEEE-754 "infinity".  We would use
+# "float('inf')" but it doesn't work on Windows pre-Python-2.6.
+_POS_INF = 1e10000
+_NEG_INF = -_POS_INF
+
+
+def _VarintSize(value):
+  """Compute the size of a varint value."""
+  if value <= 0x7f: return 1
+  if value <= 0x3fff: return 2
+  if value <= 0x1fffff: return 3
+  if value <= 0xfffffff: return 4
+  if value <= 0x7ffffffff: return 5
+  if value <= 0x3ffffffffff: return 6
+  if value <= 0x1ffffffffffff: return 7
+  if value <= 0xffffffffffffff: return 8
+  if value <= 0x7fffffffffffffff: return 9
+  return 10
+
+
+def _SignedVarintSize(value):
+  """Compute the size of a signed varint value."""
+  if value < 0: return 10
+  if value <= 0x7f: return 1
+  if value <= 0x3fff: return 2
+  if value <= 0x1fffff: return 3
+  if value <= 0xfffffff: return 4
+  if value <= 0x7ffffffff: return 5
+  if value <= 0x3ffffffffff: return 6
+  if value <= 0x1ffffffffffff: return 7
+  if value <= 0xffffffffffffff: return 8
+  if value <= 0x7fffffffffffffff: return 9
+  return 10
+
+
+def _TagSize(field_number):
+  """Returns the number of bytes required to serialize a tag with this field
+  number."""
+  # Just pass in type 0, since the type won't affect the tag+type size.
+  return _VarintSize(wire_format.PackTag(field_number, 0))
+
+
+# --------------------------------------------------------------------
+# In this section we define some generic sizers.  Each of these functions
+# takes parameters specific to a particular field type, e.g. int32 or fixed64.
+# It returns another function which in turn takes parameters specific to a
+# particular field, e.g. the field number and whether it is repeated or packed.
+# Look at the next section to see how these are used.
+
+
+def _SimpleSizer(compute_value_size):
+  """A sizer which uses the function compute_value_size to compute the size of
+  each value.  Typically compute_value_size is _VarintSize."""
+
+  def SpecificSizer(field_number, is_repeated, is_packed):
+    tag_size = _TagSize(field_number)
+    if is_packed:
+      local_VarintSize = _VarintSize
+      def PackedFieldSize(value):
+        result = 0
+        for element in value:
+          result += compute_value_size(element)
+        return result + local_VarintSize(result) + tag_size
+      return PackedFieldSize
+    elif is_repeated:
+      def RepeatedFieldSize(value):
+        result = tag_size * len(value)
+        for element in value:
+          result += compute_value_size(element)
+        return result
+      return RepeatedFieldSize
+    else:
+      def FieldSize(value):
+        return tag_size + compute_value_size(value)
+      return FieldSize
+
+  return SpecificSizer
+
+
+def _ModifiedSizer(compute_value_size, modify_value):
+  """Like SimpleSizer, but modify_value is invoked on each value before it is
+  passed to compute_value_size.  modify_value is typically ZigZagEncode."""
+
+  def SpecificSizer(field_number, is_repeated, is_packed):
+    tag_size = _TagSize(field_number)
+    if is_packed:
+      local_VarintSize = _VarintSize
+      def PackedFieldSize(value):
+        result = 0
+        for element in value:
+          result += compute_value_size(modify_value(element))
+        return result + local_VarintSize(result) + tag_size
+      return PackedFieldSize
+    elif is_repeated:
+      def RepeatedFieldSize(value):
+        result = tag_size * len(value)
+        for element in value:
+          result += compute_value_size(modify_value(element))
+        return result
+      return RepeatedFieldSize
+    else:
+      def FieldSize(value):
+        return tag_size + compute_value_size(modify_value(value))
+      return FieldSize
+
+  return SpecificSizer
+
+
+def _FixedSizer(value_size):
+  """Like _SimpleSizer except for a fixed-size field.  The input is the size
+  of one value."""
+
+  def SpecificSizer(field_number, is_repeated, is_packed):
+    tag_size = _TagSize(field_number)
+    if is_packed:
+      local_VarintSize = _VarintSize
+      def PackedFieldSize(value):
+        result = len(value) * value_size
+        return result + local_VarintSize(result) + tag_size
+      return PackedFieldSize
+    elif is_repeated:
+      element_size = value_size + tag_size
+      def RepeatedFieldSize(value):
+        return len(value) * element_size
+      return RepeatedFieldSize
+    else:
+      field_size = value_size + tag_size
+      def FieldSize(value):
+        return field_size
+      return FieldSize
+
+  return SpecificSizer
+
+
+# ====================================================================
+# Here we declare a sizer constructor for each field type.  Each "sizer
+# constructor" is a function that takes (field_number, is_repeated, is_packed)
+# as parameters and returns a sizer, which in turn takes a field value as
+# a parameter and returns its encoded size.
+
+
+Int32Sizer = Int64Sizer = EnumSizer = _SimpleSizer(_SignedVarintSize)
+
+UInt32Sizer = UInt64Sizer = _SimpleSizer(_VarintSize)
+
+SInt32Sizer = SInt64Sizer = _ModifiedSizer(
+    _SignedVarintSize, wire_format.ZigZagEncode)
+
+Fixed32Sizer = SFixed32Sizer = FloatSizer  = _FixedSizer(4)
+Fixed64Sizer = SFixed64Sizer = DoubleSizer = _FixedSizer(8)
+
+BoolSizer = _FixedSizer(1)
+
+
+def StringSizer(field_number, is_repeated, is_packed):
+  """Returns a sizer for a string field."""
+
+  tag_size = _TagSize(field_number)
+  local_VarintSize = _VarintSize
+  local_len = len
+  assert not is_packed
+  if is_repeated:
+    def RepeatedFieldSize(value):
+      result = tag_size * len(value)
+      for element in value:
+        l = local_len(element.encode('utf-8'))
+        result += local_VarintSize(l) + l
+      return result
+    return RepeatedFieldSize
+  else:
+    def FieldSize(value):
+      l = local_len(value.encode('utf-8'))
+      return tag_size + local_VarintSize(l) + l
+    return FieldSize
+
+
+def BytesSizer(field_number, is_repeated, is_packed):
+  """Returns a sizer for a bytes field."""
+
+  tag_size = _TagSize(field_number)
+  local_VarintSize = _VarintSize
+  local_len = len
+  assert not is_packed
+  if is_repeated:
+    def RepeatedFieldSize(value):
+      result = tag_size * len(value)
+      for element in value:
+        l = local_len(element)
+        result += local_VarintSize(l) + l
+      return result
+    return RepeatedFieldSize
+  else:
+    def FieldSize(value):
+      l = local_len(value)
+      return tag_size + local_VarintSize(l) + l
+    return FieldSize
+
+
+def GroupSizer(field_number, is_repeated, is_packed):
+  """Returns a sizer for a group field."""
+
+  tag_size = _TagSize(field_number) * 2
+  assert not is_packed
+  if is_repeated:
+    def RepeatedFieldSize(value):
+      result = tag_size * len(value)
+      for element in value:
+        result += element.ByteSize()
+      return result
+    return RepeatedFieldSize
+  else:
+    def FieldSize(value):
+      return tag_size + value.ByteSize()
+    return FieldSize
+
+
+def MessageSizer(field_number, is_repeated, is_packed):
+  """Returns a sizer for a message field."""
+
+  tag_size = _TagSize(field_number)
+  local_VarintSize = _VarintSize
+  assert not is_packed
+  if is_repeated:
+    def RepeatedFieldSize(value):
+      result = tag_size * len(value)
+      for element in value:
+        l = element.ByteSize()
+        result += local_VarintSize(l) + l
+      return result
+    return RepeatedFieldSize
+  else:
+    def FieldSize(value):
+      l = value.ByteSize()
+      return tag_size + local_VarintSize(l) + l
+    return FieldSize
+
+
+# --------------------------------------------------------------------
+# MessageSet is special: it needs custom logic to compute its size properly.
+
+
+def MessageSetItemSizer(field_number):
+  """Returns a sizer for extensions of MessageSet.
+
+  The message set message looks like this:
+    message MessageSet {
+      repeated group Item = 1 {
+        required int32 type_id = 2;
+        required string message = 3;
+      }
+    }
+  """
+  static_size = (_TagSize(1) * 2 + _TagSize(2) + _VarintSize(field_number) +
+                 _TagSize(3))
+  local_VarintSize = _VarintSize
+
+  def FieldSize(value):
+    l = value.ByteSize()
+    return static_size + local_VarintSize(l) + l
+
+  return FieldSize
+
+
+# --------------------------------------------------------------------
+# Map is special: it needs custom logic to compute its size properly.
+
+
+def MapSizer(field_descriptor, is_message_map):
+  """Returns a sizer for a map field."""
+
+  # Can't look at field_descriptor.message_type._concrete_class because it may
+  # not have been initialized yet.
+  message_type = field_descriptor.message_type
+  message_sizer = MessageSizer(field_descriptor.number, False, False)
+
+  def FieldSize(map_value):
+    total = 0
+    for key in map_value:
+      value = map_value[key]
+      # It's wasteful to create the messages and throw them away one second
+      # later since we'll do the same for the actual encode.  But there's not an
+      # obvious way to avoid this within the current design without tons of code
+      # duplication. For message map, value.ByteSize() should be called to
+      # update the status.
+      entry_msg = message_type._concrete_class(key=key, value=value)
+      total += message_sizer(entry_msg)
+      if is_message_map:
+        value.ByteSize()
+    return total
+
+  return FieldSize
+
+# ====================================================================
+# Encoders!
+
+
+def _VarintEncoder():
+  """Return an encoder for a basic varint value (does not include tag)."""
+
+  local_int2byte = six.int2byte
+  def EncodeVarint(write, value, unused_deterministic=None):
+    bits = value & 0x7f
+    value >>= 7
+    while value:
+      write(local_int2byte(0x80|bits))
+      bits = value & 0x7f
+      value >>= 7
+    return write(local_int2byte(bits))
+
+  return EncodeVarint
+
+
+def _SignedVarintEncoder():
+  """Return an encoder for a basic signed varint value (does not include
+  tag)."""
+
+  local_int2byte = six.int2byte
+  def EncodeSignedVarint(write, value, unused_deterministic=None):
+    if value < 0:
+      value += (1 << 64)
+    bits = value & 0x7f
+    value >>= 7
+    while value:
+      write(local_int2byte(0x80|bits))
+      bits = value & 0x7f
+      value >>= 7
+    return write(local_int2byte(bits))
+
+  return EncodeSignedVarint
+
+
+_EncodeVarint = _VarintEncoder()
+_EncodeSignedVarint = _SignedVarintEncoder()
+
+
+def _VarintBytes(value):
+  """Encode the given integer as a varint and return the bytes.  This is only
+  called at startup time so it doesn't need to be fast."""
+
+  pieces = []
+  _EncodeVarint(pieces.append, value, True)
+  return b"".join(pieces)
+
+
+def TagBytes(field_number, wire_type):
+  """Encode the given tag and return the bytes.  Only called at startup."""
+
+  return six.binary_type(
+      _VarintBytes(wire_format.PackTag(field_number, wire_type)))
+
+# --------------------------------------------------------------------
+# As with sizers (see above), we have a number of common encoder
+# implementations.
+
+
+def _SimpleEncoder(wire_type, encode_value, compute_value_size):
+  """Return a constructor for an encoder for fields of a particular type.
+
+  Args:
+      wire_type:  The field's wire type, for encoding tags.
+      encode_value:  A function which encodes an individual value, e.g.
+        _EncodeVarint().
+      compute_value_size:  A function which computes the size of an individual
+        value, e.g. _VarintSize().
+  """
+
+  def SpecificEncoder(field_number, is_repeated, is_packed):
+    if is_packed:
+      tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
+      local_EncodeVarint = _EncodeVarint
+      def EncodePackedField(write, value, deterministic):
+        write(tag_bytes)
+        size = 0
+        for element in value:
+          size += compute_value_size(element)
+        local_EncodeVarint(write, size, deterministic)
+        for element in value:
+          encode_value(write, element, deterministic)
+      return EncodePackedField
+    elif is_repeated:
+      tag_bytes = TagBytes(field_number, wire_type)
+      def EncodeRepeatedField(write, value, deterministic):
+        for element in value:
+          write(tag_bytes)
+          encode_value(write, element, deterministic)
+      return EncodeRepeatedField
+    else:
+      tag_bytes = TagBytes(field_number, wire_type)
+      def EncodeField(write, value, deterministic):
+        write(tag_bytes)
+        return encode_value(write, value, deterministic)
+      return EncodeField
+
+  return SpecificEncoder
+
+
+def _ModifiedEncoder(wire_type, encode_value, compute_value_size, modify_value):
+  """Like SimpleEncoder but additionally invokes modify_value on every value
+  before passing it to encode_value.  Usually modify_value is ZigZagEncode."""
+
+  def SpecificEncoder(field_number, is_repeated, is_packed):
+    if is_packed:
+      tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
+      local_EncodeVarint = _EncodeVarint
+      def EncodePackedField(write, value, deterministic):
+        write(tag_bytes)
+        size = 0
+        for element in value:
+          size += compute_value_size(modify_value(element))
+        local_EncodeVarint(write, size, deterministic)
+        for element in value:
+          encode_value(write, modify_value(element), deterministic)
+      return EncodePackedField
+    elif is_repeated:
+      tag_bytes = TagBytes(field_number, wire_type)
+      def EncodeRepeatedField(write, value, deterministic):
+        for element in value:
+          write(tag_bytes)
+          encode_value(write, modify_value(element), deterministic)
+      return EncodeRepeatedField
+    else:
+      tag_bytes = TagBytes(field_number, wire_type)
+      def EncodeField(write, value, deterministic):
+        write(tag_bytes)
+        return encode_value(write, modify_value(value), deterministic)
+      return EncodeField
+
+  return SpecificEncoder
+
+
+def _StructPackEncoder(wire_type, format):
+  """Return a constructor for an encoder for a fixed-width field.
+
+  Args:
+      wire_type:  The field's wire type, for encoding tags.
+      format:  The format string to pass to struct.pack().
+  """
+
+  value_size = struct.calcsize(format)
+
+  def SpecificEncoder(field_number, is_repeated, is_packed):
+    local_struct_pack = struct.pack
+    if is_packed:
+      tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
+      local_EncodeVarint = _EncodeVarint
+      def EncodePackedField(write, value, deterministic):
+        write(tag_bytes)
+        local_EncodeVarint(write, len(value) * value_size, deterministic)
+        for element in value:
+          write(local_struct_pack(format, element))
+      return EncodePackedField
+    elif is_repeated:
+      tag_bytes = TagBytes(field_number, wire_type)
+      def EncodeRepeatedField(write, value, unused_deterministic=None):
+        for element in value:
+          write(tag_bytes)
+          write(local_struct_pack(format, element))
+      return EncodeRepeatedField
+    else:
+      tag_bytes = TagBytes(field_number, wire_type)
+      def EncodeField(write, value, unused_deterministic=None):
+        write(tag_bytes)
+        return write(local_struct_pack(format, value))
+      return EncodeField
+
+  return SpecificEncoder
+
+
+def _FloatingPointEncoder(wire_type, format):
+  """Return a constructor for an encoder for float fields.
+
+  This is like StructPackEncoder, but catches errors that may be due to
+  passing non-finite floating-point values to struct.pack, and makes a
+  second attempt to encode those values.
+
+  Args:
+      wire_type:  The field's wire type, for encoding tags.
+      format:  The format string to pass to struct.pack().
+  """
+
+  value_size = struct.calcsize(format)
+  if value_size == 4:
+    def EncodeNonFiniteOrRaise(write, value):
+      # Remember that the serialized form uses little-endian byte order.
+      if value == _POS_INF:
+        write(b'\x00\x00\x80\x7F')
+      elif value == _NEG_INF:
+        write(b'\x00\x00\x80\xFF')
+      elif value != value:           # NaN
+        write(b'\x00\x00\xC0\x7F')
+      else:
+        raise
+  elif value_size == 8:
+    def EncodeNonFiniteOrRaise(write, value):
+      if value == _POS_INF:
+        write(b'\x00\x00\x00\x00\x00\x00\xF0\x7F')
+      elif value == _NEG_INF:
+        write(b'\x00\x00\x00\x00\x00\x00\xF0\xFF')
+      elif value != value:                         # NaN
+        write(b'\x00\x00\x00\x00\x00\x00\xF8\x7F')
+      else:
+        raise
+  else:
+    raise ValueError('Can\'t encode floating-point values that are '
+                     '%d bytes long (only 4 or 8)' % value_size)
+
+  def SpecificEncoder(field_number, is_repeated, is_packed):
+    local_struct_pack = struct.pack
+    if is_packed:
+      tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
+      local_EncodeVarint = _EncodeVarint
+      def EncodePackedField(write, value, deterministic):
+        write(tag_bytes)
+        local_EncodeVarint(write, len(value) * value_size, deterministic)
+        for element in value:
+          # This try/except block is going to be faster than any code that
+          # we could write to check whether element is finite.
+          try:
+            write(local_struct_pack(format, element))
+          except SystemError:
+            EncodeNonFiniteOrRaise(write, element)
+      return EncodePackedField
+    elif is_repeated:
+      tag_bytes = TagBytes(field_number, wire_type)
+      def EncodeRepeatedField(write, value, unused_deterministic=None):
+        for element in value:
+          write(tag_bytes)
+          try:
+            write(local_struct_pack(format, element))
+          except SystemError:
+            EncodeNonFiniteOrRaise(write, element)
+      return EncodeRepeatedField
+    else:
+      tag_bytes = TagBytes(field_number, wire_type)
+      def EncodeField(write, value, unused_deterministic=None):
+        write(tag_bytes)
+        try:
+          write(local_struct_pack(format, value))
+        except SystemError:
+          EncodeNonFiniteOrRaise(write, value)
+      return EncodeField
+
+  return SpecificEncoder
+
+
+# ====================================================================
+# Here we declare an encoder constructor for each field type.  These work
+# very similarly to sizer constructors, described earlier.
+
+
+Int32Encoder = Int64Encoder = EnumEncoder = _SimpleEncoder(
+    wire_format.WIRETYPE_VARINT, _EncodeSignedVarint, _SignedVarintSize)
+
+UInt32Encoder = UInt64Encoder = _SimpleEncoder(
+    wire_format.WIRETYPE_VARINT, _EncodeVarint, _VarintSize)
+
+SInt32Encoder = SInt64Encoder = _ModifiedEncoder(
+    wire_format.WIRETYPE_VARINT, _EncodeVarint, _VarintSize,
+    wire_format.ZigZagEncode)
+
+# Note that Python conveniently guarantees that when using the '<' prefix on
+# formats, they will also have the same size across all platforms (as opposed
+# to without the prefix, where their sizes depend on the C compiler's basic
+# type sizes).
+Fixed32Encoder  = _StructPackEncoder(wire_format.WIRETYPE_FIXED32, '<I')
+Fixed64Encoder  = _StructPackEncoder(wire_format.WIRETYPE_FIXED64, '<Q')
+SFixed32Encoder = _StructPackEncoder(wire_format.WIRETYPE_FIXED32, '<i')
+SFixed64Encoder = _StructPackEncoder(wire_format.WIRETYPE_FIXED64, '<q')
+FloatEncoder    = _FloatingPointEncoder(wire_format.WIRETYPE_FIXED32, '<f')
+DoubleEncoder   = _FloatingPointEncoder(wire_format.WIRETYPE_FIXED64, '<d')
+
+
+def BoolEncoder(field_number, is_repeated, is_packed):
+  """Returns an encoder for a boolean field."""
+
+  false_byte = b'\x00'
+  true_byte = b'\x01'
+  if is_packed:
+    tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
+    local_EncodeVarint = _EncodeVarint
+    def EncodePackedField(write, value, deterministic):
+      write(tag_bytes)
+      local_EncodeVarint(write, len(value), deterministic)
+      for element in value:
+        if element:
+          write(true_byte)
+        else:
+          write(false_byte)
+    return EncodePackedField
+  elif is_repeated:
+    tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_VARINT)
+    def EncodeRepeatedField(write, value, unused_deterministic=None):
+      for element in value:
+        write(tag_bytes)
+        if element:
+          write(true_byte)
+        else:
+          write(false_byte)
+    return EncodeRepeatedField
+  else:
+    tag_bytes = TagBytes(field_number, wire_format.WIRETYPE_VARINT)
+    def EncodeField(write, value, unused_deterministic=None):
+      write(tag_bytes)
+      if value:
+        return write(true_byte)
+      return write(false_byte)
+    return EncodeField
+
+
+def StringEncoder(field_number, is_repeated, is_packed):
+  """Returns an encoder for a string field."""
+
+  tag = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
+  local_EncodeVarint = _EncodeVarint
+  local_len = len
+  assert not is_packed
+  if is_repeated:
+    def EncodeRepeatedField(write, value, deterministic):
+      for element in value:
+        encoded = element.encode('utf-8')
+        write(tag)
+        local_EncodeVarint(write, local_len(encoded), deterministic)
+        write(encoded)
+    return EncodeRepeatedField
+  else:
+    def EncodeField(write, value, deterministic):
+      encoded = value.encode('utf-8')
+      write(tag)
+      local_EncodeVarint(write, local_len(encoded), deterministic)
+      return write(encoded)
+    return EncodeField
+
+
+def BytesEncoder(field_number, is_repeated, is_packed):
+  """Returns an encoder for a bytes field."""
+
+  tag = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
+  local_EncodeVarint = _EncodeVarint
+  local_len = len
+  assert not is_packed
+  if is_repeated:
+    def EncodeRepeatedField(write, value, deterministic):
+      for element in value:
+        write(tag)
+        local_EncodeVarint(write, local_len(element), deterministic)
+        write(element)
+    return EncodeRepeatedField
+  else:
+    def EncodeField(write, value, deterministic):
+      write(tag)
+      local_EncodeVarint(write, local_len(value), deterministic)
+      return write(value)
+    return EncodeField
+
+
+def GroupEncoder(field_number, is_repeated, is_packed):
+  """Returns an encoder for a group field."""
+
+  start_tag = TagBytes(field_number, wire_format.WIRETYPE_START_GROUP)
+  end_tag = TagBytes(field_number, wire_format.WIRETYPE_END_GROUP)
+  assert not is_packed
+  if is_repeated:
+    def EncodeRepeatedField(write, value, deterministic):
+      for element in value:
+        write(start_tag)
+        element._InternalSerialize(write, deterministic)
+        write(end_tag)
+    return EncodeRepeatedField
+  else:
+    def EncodeField(write, value, deterministic):
+      write(start_tag)
+      value._InternalSerialize(write, deterministic)
+      return write(end_tag)
+    return EncodeField
+
+
+def MessageEncoder(field_number, is_repeated, is_packed):
+  """Returns an encoder for a message field."""
+
+  tag = TagBytes(field_number, wire_format.WIRETYPE_LENGTH_DELIMITED)
+  local_EncodeVarint = _EncodeVarint
+  assert not is_packed
+  if is_repeated:
+    def EncodeRepeatedField(write, value, deterministic):
+      for element in value:
+        write(tag)
+        local_EncodeVarint(write, element.ByteSize(), deterministic)
+        element._InternalSerialize(write, deterministic)
+    return EncodeRepeatedField
+  else:
+    def EncodeField(write, value, deterministic):
+      write(tag)
+      local_EncodeVarint(write, value.ByteSize(), deterministic)
+      return value._InternalSerialize(write, deterministic)
+    return EncodeField
+
+
+# --------------------------------------------------------------------
+# As before, MessageSet is special.
+
+
+def MessageSetItemEncoder(field_number):
+  """Encoder for extensions of MessageSet.
+
+  The message set message looks like this:
+    message MessageSet {
+      repeated group Item = 1 {
+        required int32 type_id = 2;
+        required string message = 3;
+      }
+    }
+  """
+  start_bytes = b"".join([
+      TagBytes(1, wire_format.WIRETYPE_START_GROUP),
+      TagBytes(2, wire_format.WIRETYPE_VARINT),
+      _VarintBytes(field_number),
+      TagBytes(3, wire_format.WIRETYPE_LENGTH_DELIMITED)])
+  end_bytes = TagBytes(1, wire_format.WIRETYPE_END_GROUP)
+  local_EncodeVarint = _EncodeVarint
+
+  def EncodeField(write, value, deterministic):
+    write(start_bytes)
+    local_EncodeVarint(write, value.ByteSize(), deterministic)
+    value._InternalSerialize(write, deterministic)
+    return write(end_bytes)
+
+  return EncodeField
+
+
+# --------------------------------------------------------------------
+# As before, Map is special.
+
+
+def MapEncoder(field_descriptor):
+  """Encoder for extensions of MessageSet.
+
+  Maps always have a wire format like this:
+    message MapEntry {
+      key_type key = 1;
+      value_type value = 2;
+    }
+    repeated MapEntry map = N;
+  """
+  # Can't look at field_descriptor.message_type._concrete_class because it may
+  # not have been initialized yet.
+  message_type = field_descriptor.message_type
+  encode_message = MessageEncoder(field_descriptor.number, False, False)
+
+  def EncodeField(write, value, deterministic):
+    value_keys = sorted(value.keys()) if deterministic else value
+    for key in value_keys:
+      entry_msg = message_type._concrete_class(key=key, value=value[key])
+      encode_message(write, entry_msg, deterministic)
+
+  return EncodeField
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/enum_type_wrapper.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/enum_type_wrapper.py
new file mode 100644
index 0000000..c8e1013
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/enum_type_wrapper.py
@@ -0,0 +1,115 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""A simple wrapper around enum types to expose utility functions.
+
+Instances are created as properties with the same name as the enum they wrap
+on proto classes.  For usage, see:
+  reflection_test.py
+"""
+
+__author__ = 'rabsatt@google.com (Kevin Rabsatt)'
+
+import six
+
+
+class EnumTypeWrapper(object):
+  """A utility for finding the names of enum values."""
+
+  DESCRIPTOR = None
+
+  def __init__(self, enum_type):
+    """Inits EnumTypeWrapper with an EnumDescriptor."""
+    self._enum_type = enum_type
+    self.DESCRIPTOR = enum_type  # pylint: disable=invalid-name
+
+  def Name(self, number):  # pylint: disable=invalid-name
+    """Returns a string containing the name of an enum value."""
+    try:
+      return self._enum_type.values_by_number[number].name
+    except KeyError:
+      pass  # fall out to break exception chaining
+
+    if not isinstance(number, six.integer_types):
+      raise TypeError(
+          'Enum value for {} must be an int, but got {} {!r}.'.format(
+              self._enum_type.name, type(number), number))
+    else:
+      # repr here to handle the odd case when you pass in a boolean.
+      raise ValueError('Enum {} has no name defined for value {!r}'.format(
+          self._enum_type.name, number))
+
+  def Value(self, name):  # pylint: disable=invalid-name
+    """Returns the value corresponding to the given enum name."""
+    try:
+      return self._enum_type.values_by_name[name].number
+    except KeyError:
+      pass  # fall out to break exception chaining
+    raise ValueError('Enum {} has no value defined for name {!r}'.format(
+        self._enum_type.name, name))
+
+  def keys(self):
+    """Return a list of the string names in the enum.
+
+    Returns:
+      A list of strs, in the order they were defined in the .proto file.
+    """
+
+    return [value_descriptor.name
+            for value_descriptor in self._enum_type.values]
+
+  def values(self):
+    """Return a list of the integer values in the enum.
+
+    Returns:
+      A list of ints, in the order they were defined in the .proto file.
+    """
+
+    return [value_descriptor.number
+            for value_descriptor in self._enum_type.values]
+
+  def items(self):
+    """Return a list of the (name, value) pairs of the enum.
+
+    Returns:
+      A list of (str, int) pairs, in the order they were defined
+      in the .proto file.
+    """
+    return [(value_descriptor.name, value_descriptor.number)
+            for value_descriptor in self._enum_type.values]
+
+  def __getattr__(self, name):
+    """Returns the value corresponding to the given enum name."""
+    try:
+      return self._enum_type.values_by_name[name].number
+    except KeyError:
+      pass  # fall out to break exception chaining
+    raise AttributeError('Enum {} has no value defined for name {!r}'.format(
+        self._enum_type.name, name))
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/extension_dict.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/extension_dict.py
new file mode 100644
index 0000000..b346cf2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/extension_dict.py
@@ -0,0 +1,213 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Contains _ExtensionDict class to represent extensions.
+"""
+
+from google.protobuf.internal import type_checkers
+from google.protobuf.descriptor import FieldDescriptor
+
+
+def _VerifyExtensionHandle(message, extension_handle):
+  """Verify that the given extension handle is valid."""
+
+  if not isinstance(extension_handle, FieldDescriptor):
+    raise KeyError('HasExtension() expects an extension handle, got: %s' %
+                   extension_handle)
+
+  if not extension_handle.is_extension:
+    raise KeyError('"%s" is not an extension.' % extension_handle.full_name)
+
+  if not extension_handle.containing_type:
+    raise KeyError('"%s" is missing a containing_type.'
+                   % extension_handle.full_name)
+
+  if extension_handle.containing_type is not message.DESCRIPTOR:
+    raise KeyError('Extension "%s" extends message type "%s", but this '
+                   'message is of type "%s".' %
+                   (extension_handle.full_name,
+                    extension_handle.containing_type.full_name,
+                    message.DESCRIPTOR.full_name))
+
+
+# TODO(robinson): Unify error handling of "unknown extension" crap.
+# TODO(robinson): Support iteritems()-style iteration over all
+# extensions with the "has" bits turned on?
+class _ExtensionDict(object):
+
+  """Dict-like container for Extension fields on proto instances.
+
+  Note that in all cases we expect extension handles to be
+  FieldDescriptors.
+  """
+
+  def __init__(self, extended_message):
+    """
+    Args:
+      extended_message: Message instance for which we are the Extensions dict.
+    """
+    self._extended_message = extended_message
+
+  def __getitem__(self, extension_handle):
+    """Returns the current value of the given extension handle."""
+
+    _VerifyExtensionHandle(self._extended_message, extension_handle)
+
+    result = self._extended_message._fields.get(extension_handle)
+    if result is not None:
+      return result
+
+    if extension_handle.label == FieldDescriptor.LABEL_REPEATED:
+      result = extension_handle._default_constructor(self._extended_message)
+    elif extension_handle.cpp_type == FieldDescriptor.CPPTYPE_MESSAGE:
+      message_type = extension_handle.message_type
+      if not hasattr(message_type, '_concrete_class'):
+        # pylint: disable=protected-access
+        self._extended_message._FACTORY.GetPrototype(message_type)
+      assert getattr(extension_handle.message_type, '_concrete_class', None), (
+          'Uninitialized concrete class found for field %r (message type %r)'
+          % (extension_handle.full_name,
+             extension_handle.message_type.full_name))
+      result = extension_handle.message_type._concrete_class()
+      try:
+        result._SetListener(self._extended_message._listener_for_children)
+      except ReferenceError:
+        pass
+    else:
+      # Singular scalar -- just return the default without inserting into the
+      # dict.
+      return extension_handle.default_value
+
+    # Atomically check if another thread has preempted us and, if not, swap
+    # in the new object we just created.  If someone has preempted us, we
+    # take that object and discard ours.
+    # WARNING:  We are relying on setdefault() being atomic.  This is true
+    #   in CPython but we haven't investigated others.  This warning appears
+    #   in several other locations in this file.
+    result = self._extended_message._fields.setdefault(
+        extension_handle, result)
+
+    return result
+
+  def __eq__(self, other):
+    if not isinstance(other, self.__class__):
+      return False
+
+    my_fields = self._extended_message.ListFields()
+    other_fields = other._extended_message.ListFields()
+
+    # Get rid of non-extension fields.
+    my_fields = [field for field in my_fields if field.is_extension]
+    other_fields = [field for field in other_fields if field.is_extension]
+
+    return my_fields == other_fields
+
+  def __ne__(self, other):
+    return not self == other
+
+  def __len__(self):
+    fields = self._extended_message.ListFields()
+    # Get rid of non-extension fields.
+    extension_fields = [field for field in fields if field[0].is_extension]
+    return len(extension_fields)
+
+  def __hash__(self):
+    raise TypeError('unhashable object')
+
+  # Note that this is only meaningful for non-repeated, scalar extension
+  # fields.  Note also that we may have to call _Modified() when we do
+  # successfully set a field this way, to set any necessary "has" bits in the
+  # ancestors of the extended message.
+  def __setitem__(self, extension_handle, value):
+    """If extension_handle specifies a non-repeated, scalar extension
+    field, sets the value of that field.
+    """
+
+    _VerifyExtensionHandle(self._extended_message, extension_handle)
+
+    if (extension_handle.label == FieldDescriptor.LABEL_REPEATED or
+        extension_handle.cpp_type == FieldDescriptor.CPPTYPE_MESSAGE):
+      raise TypeError(
+          'Cannot assign to extension "%s" because it is a repeated or '
+          'composite type.' % extension_handle.full_name)
+
+    # It's slightly wasteful to lookup the type checker each time,
+    # but we expect this to be a vanishingly uncommon case anyway.
+    type_checker = type_checkers.GetTypeChecker(extension_handle)
+    # pylint: disable=protected-access
+    self._extended_message._fields[extension_handle] = (
+        type_checker.CheckValue(value))
+    self._extended_message._Modified()
+
+  def __delitem__(self, extension_handle):
+    self._extended_message.ClearExtension(extension_handle)
+
+  def _FindExtensionByName(self, name):
+    """Tries to find a known extension with the specified name.
+
+    Args:
+      name: Extension full name.
+
+    Returns:
+      Extension field descriptor.
+    """
+    return self._extended_message._extensions_by_name.get(name, None)
+
+  def _FindExtensionByNumber(self, number):
+    """Tries to find a known extension with the field number.
+
+    Args:
+      number: Extension field number.
+
+    Returns:
+      Extension field descriptor.
+    """
+    return self._extended_message._extensions_by_number.get(number, None)
+
+  def __iter__(self):
+    # Return a generator over the populated extension fields
+    return (f[0] for f in self._extended_message.ListFields()
+            if f[0].is_extension)
+
+  def __contains__(self, extension_handle):
+    _VerifyExtensionHandle(self._extended_message, extension_handle)
+
+    if extension_handle not in self._extended_message._fields:
+      return False
+
+    if extension_handle.label == FieldDescriptor.LABEL_REPEATED:
+      return bool(self._extended_message._fields.get(extension_handle))
+
+    if extension_handle.cpp_type == FieldDescriptor.CPPTYPE_MESSAGE:
+      value = self._extended_message._fields.get(extension_handle)
+      # pylint: disable=protected-access
+      return value is not None and value._is_present_in_parent
+
+    return True
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/factory_test1_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/factory_test1_pb2.py
new file mode 100644
index 0000000..54d2e81
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/factory_test1_pb2.py
@@ -0,0 +1,304 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/factory_test1.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/factory_test1.proto',
+  package='google.protobuf.python.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n,google/protobuf/internal/factory_test1.proto\x12\x1fgoogle.protobuf.python.internal\"\xd5\x03\n\x0f\x46\x61\x63tory1Message\x12\x45\n\x0e\x66\x61\x63tory_1_enum\x18\x01 \x01(\x0e\x32-.google.protobuf.python.internal.Factory1Enum\x12\x62\n\x15nested_factory_1_enum\x18\x02 \x01(\x0e\x32\x43.google.protobuf.python.internal.Factory1Message.NestedFactory1Enum\x12h\n\x18nested_factory_1_message\x18\x03 \x01(\x0b\x32\x46.google.protobuf.python.internal.Factory1Message.NestedFactory1Message\x12\x14\n\x0cscalar_value\x18\x04 \x01(\x05\x12\x12\n\nlist_value\x18\x05 \x03(\t\x1a&\n\x15NestedFactory1Message\x12\r\n\x05value\x18\x01 \x01(\t\"P\n\x12NestedFactory1Enum\x12\x1c\n\x18NESTED_FACTORY_1_VALUE_0\x10\x00\x12\x1c\n\x18NESTED_FACTORY_1_VALUE_1\x10\x01*\t\x08\xe8\x07\x10\x80\x80\x80\x80\x02\")\n\x15\x46\x61\x63tory1MethodRequest\x12\x10\n\x08\x61rgument\x18\x01 \x01(\t\"(\n\x16\x46\x61\x63tory1MethodResponse\x12\x0e\n\x06result\x18\x01 \x01(\t*<\n\x0c\x46\x61\x63tory1Enum\x12\x15\n\x11\x46\x41\x43TORY_1_VALUE_0\x10\x00\x12\x15\n\x11\x46\x41\x43TORY_1_VALUE_1\x10\x01\x32\x97\x01\n\x0f\x46\x61\x63tory1Service\x12\x83\x01\n\x0e\x46\x61\x63tory1Method\x12\x36.google.protobuf.python.internal.Factory1MethodRequest\x1a\x37.google.protobuf.python.internal.Factory1MethodResponse\"\x00'
+)
+
+_FACTORY1ENUM = _descriptor.EnumDescriptor(
+  name='Factory1Enum',
+  full_name='google.protobuf.python.internal.Factory1Enum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FACTORY_1_VALUE_0', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FACTORY_1_VALUE_1', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=638,
+  serialized_end=698,
+)
+_sym_db.RegisterEnumDescriptor(_FACTORY1ENUM)
+
+Factory1Enum = enum_type_wrapper.EnumTypeWrapper(_FACTORY1ENUM)
+FACTORY_1_VALUE_0 = 0
+FACTORY_1_VALUE_1 = 1
+
+
+_FACTORY1MESSAGE_NESTEDFACTORY1ENUM = _descriptor.EnumDescriptor(
+  name='NestedFactory1Enum',
+  full_name='google.protobuf.python.internal.Factory1Message.NestedFactory1Enum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='NESTED_FACTORY_1_VALUE_0', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='NESTED_FACTORY_1_VALUE_1', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=460,
+  serialized_end=540,
+)
+_sym_db.RegisterEnumDescriptor(_FACTORY1MESSAGE_NESTEDFACTORY1ENUM)
+
+
+_FACTORY1MESSAGE_NESTEDFACTORY1MESSAGE = _descriptor.Descriptor(
+  name='NestedFactory1Message',
+  full_name='google.protobuf.python.internal.Factory1Message.NestedFactory1Message',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.python.internal.Factory1Message.NestedFactory1Message.value', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=420,
+  serialized_end=458,
+)
+
+_FACTORY1MESSAGE = _descriptor.Descriptor(
+  name='Factory1Message',
+  full_name='google.protobuf.python.internal.Factory1Message',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='factory_1_enum', full_name='google.protobuf.python.internal.Factory1Message.factory_1_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_factory_1_enum', full_name='google.protobuf.python.internal.Factory1Message.nested_factory_1_enum', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_factory_1_message', full_name='google.protobuf.python.internal.Factory1Message.nested_factory_1_message', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='scalar_value', full_name='google.protobuf.python.internal.Factory1Message.scalar_value', index=3,
+      number=4, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='list_value', full_name='google.protobuf.python.internal.Factory1Message.list_value', index=4,
+      number=5, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_FACTORY1MESSAGE_NESTEDFACTORY1MESSAGE, ],
+  enum_types=[
+    _FACTORY1MESSAGE_NESTEDFACTORY1ENUM,
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=82,
+  serialized_end=551,
+)
+
+
+_FACTORY1METHODREQUEST = _descriptor.Descriptor(
+  name='Factory1MethodRequest',
+  full_name='google.protobuf.python.internal.Factory1MethodRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='argument', full_name='google.protobuf.python.internal.Factory1MethodRequest.argument', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=553,
+  serialized_end=594,
+)
+
+
+_FACTORY1METHODRESPONSE = _descriptor.Descriptor(
+  name='Factory1MethodResponse',
+  full_name='google.protobuf.python.internal.Factory1MethodResponse',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='result', full_name='google.protobuf.python.internal.Factory1MethodResponse.result', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=596,
+  serialized_end=636,
+)
+
+_FACTORY1MESSAGE_NESTEDFACTORY1MESSAGE.containing_type = _FACTORY1MESSAGE
+_FACTORY1MESSAGE.fields_by_name['factory_1_enum'].enum_type = _FACTORY1ENUM
+_FACTORY1MESSAGE.fields_by_name['nested_factory_1_enum'].enum_type = _FACTORY1MESSAGE_NESTEDFACTORY1ENUM
+_FACTORY1MESSAGE.fields_by_name['nested_factory_1_message'].message_type = _FACTORY1MESSAGE_NESTEDFACTORY1MESSAGE
+_FACTORY1MESSAGE_NESTEDFACTORY1ENUM.containing_type = _FACTORY1MESSAGE
+DESCRIPTOR.message_types_by_name['Factory1Message'] = _FACTORY1MESSAGE
+DESCRIPTOR.message_types_by_name['Factory1MethodRequest'] = _FACTORY1METHODREQUEST
+DESCRIPTOR.message_types_by_name['Factory1MethodResponse'] = _FACTORY1METHODRESPONSE
+DESCRIPTOR.enum_types_by_name['Factory1Enum'] = _FACTORY1ENUM
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Factory1Message = _reflection.GeneratedProtocolMessageType('Factory1Message', (_message.Message,), {
+
+  'NestedFactory1Message' : _reflection.GeneratedProtocolMessageType('NestedFactory1Message', (_message.Message,), {
+    'DESCRIPTOR' : _FACTORY1MESSAGE_NESTEDFACTORY1MESSAGE,
+    '__module__' : 'google.protobuf.internal.factory_test1_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.Factory1Message.NestedFactory1Message)
+    })
+  ,
+  'DESCRIPTOR' : _FACTORY1MESSAGE,
+  '__module__' : 'google.protobuf.internal.factory_test1_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.Factory1Message)
+  })
+_sym_db.RegisterMessage(Factory1Message)
+_sym_db.RegisterMessage(Factory1Message.NestedFactory1Message)
+
+Factory1MethodRequest = _reflection.GeneratedProtocolMessageType('Factory1MethodRequest', (_message.Message,), {
+  'DESCRIPTOR' : _FACTORY1METHODREQUEST,
+  '__module__' : 'google.protobuf.internal.factory_test1_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.Factory1MethodRequest)
+  })
+_sym_db.RegisterMessage(Factory1MethodRequest)
+
+Factory1MethodResponse = _reflection.GeneratedProtocolMessageType('Factory1MethodResponse', (_message.Message,), {
+  'DESCRIPTOR' : _FACTORY1METHODRESPONSE,
+  '__module__' : 'google.protobuf.internal.factory_test1_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.Factory1MethodResponse)
+  })
+_sym_db.RegisterMessage(Factory1MethodResponse)
+
+
+
+_FACTORY1SERVICE = _descriptor.ServiceDescriptor(
+  name='Factory1Service',
+  full_name='google.protobuf.python.internal.Factory1Service',
+  file=DESCRIPTOR,
+  index=0,
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_start=701,
+  serialized_end=852,
+  methods=[
+  _descriptor.MethodDescriptor(
+    name='Factory1Method',
+    full_name='google.protobuf.python.internal.Factory1Service.Factory1Method',
+    index=0,
+    containing_service=None,
+    input_type=_FACTORY1METHODREQUEST,
+    output_type=_FACTORY1METHODRESPONSE,
+    serialized_options=None,
+    create_key=_descriptor._internal_create_key,
+  ),
+])
+_sym_db.RegisterServiceDescriptor(_FACTORY1SERVICE)
+
+DESCRIPTOR.services_by_name['Factory1Service'] = _FACTORY1SERVICE
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/factory_test2_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/factory_test2_pb2.py
new file mode 100644
index 0000000..302e45a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/factory_test2_pb2.py
@@ -0,0 +1,533 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/factory_test2.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf.internal import factory_test1_pb2 as google_dot_protobuf_dot_internal_dot_factory__test1__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/factory_test2.proto',
+  package='google.protobuf.python.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n,google/protobuf/internal/factory_test2.proto\x12\x1fgoogle.protobuf.python.internal\x1a,google/protobuf/internal/factory_test1.proto\"\xd8\x0b\n\x0f\x46\x61\x63tory2Message\x12\x11\n\tmandatory\x18\x01 \x02(\x05\x12\x45\n\x0e\x66\x61\x63tory_2_enum\x18\x02 \x01(\x0e\x32-.google.protobuf.python.internal.Factory2Enum\x12\x62\n\x15nested_factory_2_enum\x18\x03 \x01(\x0e\x32\x43.google.protobuf.python.internal.Factory2Message.NestedFactory2Enum\x12h\n\x18nested_factory_2_message\x18\x04 \x01(\x0b\x32\x46.google.protobuf.python.internal.Factory2Message.NestedFactory2Message\x12K\n\x11\x66\x61\x63tory_1_message\x18\x05 \x01(\x0b\x32\x30.google.protobuf.python.internal.Factory1Message\x12\x45\n\x0e\x66\x61\x63tory_1_enum\x18\x06 \x01(\x0e\x32-.google.protobuf.python.internal.Factory1Enum\x12\x62\n\x15nested_factory_1_enum\x18\x07 \x01(\x0e\x32\x43.google.protobuf.python.internal.Factory1Message.NestedFactory1Enum\x12h\n\x18nested_factory_1_message\x18\x08 \x01(\x0b\x32\x46.google.protobuf.python.internal.Factory1Message.NestedFactory1Message\x12J\n\x10\x63ircular_message\x18\t \x01(\x0b\x32\x30.google.protobuf.python.internal.Factory2Message\x12\x14\n\x0cscalar_value\x18\n \x01(\t\x12\x12\n\nlist_value\x18\x0b \x03(\t\x12I\n\x07grouped\x18\x0c \x03(\n28.google.protobuf.python.internal.Factory2Message.Grouped\x12:\n\x04loop\x18\x0f \x01(\x0b\x32,.google.protobuf.python.internal.LoopMessage\x12\x1e\n\x10int_with_default\x18\x10 \x01(\x05:\x04\x31\x37\x37\x36\x12!\n\x13\x64ouble_with_default\x18\x11 \x01(\x01:\x04\x39.99\x12(\n\x13string_with_default\x18\x12 \x01(\t:\x0bhello world\x12 \n\x11\x62ool_with_default\x18\x13 \x01(\x08:\x05\x66\x61lse\x12[\n\x11\x65num_with_default\x18\x14 \x01(\x0e\x32-.google.protobuf.python.internal.Factory2Enum:\x11\x46\x41\x43TORY_2_VALUE_1\x12&\n\x12\x62ytes_with_default\x18\x15 \x01(\x0c:\na\\373\\000c\x12\x13\n\toneof_int\x18\x16 \x01(\x05H\x00\x12\x16\n\x0coneof_string\x18\x17 \x01(\tH\x00\x1a&\n\x15NestedFactory2Message\x12\r\n\x05value\x18\x01 \x01(\t\x1a)\n\x07Grouped\x12\x0e\n\x06part_1\x18\r \x01(\t\x12\x0e\n\x06part_2\x18\x0e \x01(\t\"P\n\x12NestedFactory2Enum\x12\x1c\n\x18NESTED_FACTORY_2_VALUE_0\x10\x00\x12\x1c\n\x18NESTED_FACTORY_2_VALUE_1\x10\x01\x32I\n\x0eone_more_field\x12\x30.google.protobuf.python.internal.Factory1Message\x18\xe9\x07 \x01(\tB\r\n\x0boneof_field\"M\n\x0bLoopMessage\x12>\n\x04loop\x18\x01 \x01(\x0b\x32\x30.google.protobuf.python.internal.Factory2Message\"D\n\x19MessageWithNestedEnumOnly\"\'\n\nNestedEnum\x12\x19\n\x15NESTED_MESSAGE_ENUM_0\x10\x00\"\'\n\x11MessageWithOption\x12\x0e\n\x06\x66ield1\x18\x01 \x01(\x05:\x02\x10\x01*<\n\x0c\x46\x61\x63tory2Enum\x12\x15\n\x11\x46\x41\x43TORY_2_VALUE_0\x10\x00\x12\x15\n\x11\x46\x41\x43TORY_2_VALUE_1\x10\x01:H\n\ranother_field\x12\x30.google.protobuf.python.internal.Factory1Message\x18\xea\x07 \x01(\t'
+  ,
+  dependencies=[google_dot_protobuf_dot_internal_dot_factory__test1__pb2.DESCRIPTOR,])
+
+_FACTORY2ENUM = _descriptor.EnumDescriptor(
+  name='Factory2Enum',
+  full_name='google.protobuf.python.internal.Factory2Enum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FACTORY_2_VALUE_0', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FACTORY_2_VALUE_1', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=1816,
+  serialized_end=1876,
+)
+_sym_db.RegisterEnumDescriptor(_FACTORY2ENUM)
+
+Factory2Enum = enum_type_wrapper.EnumTypeWrapper(_FACTORY2ENUM)
+FACTORY_2_VALUE_0 = 0
+FACTORY_2_VALUE_1 = 1
+
+ANOTHER_FIELD_FIELD_NUMBER = 1002
+another_field = _descriptor.FieldDescriptor(
+  name='another_field', full_name='google.protobuf.python.internal.another_field', index=0,
+  number=1002, type=9, cpp_type=9, label=1,
+  has_default_value=False, default_value=b"".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+_FACTORY2MESSAGE_NESTEDFACTORY2ENUM = _descriptor.EnumDescriptor(
+  name='NestedFactory2Enum',
+  full_name='google.protobuf.python.internal.Factory2Message.NestedFactory2Enum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='NESTED_FACTORY_2_VALUE_0', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='NESTED_FACTORY_2_VALUE_1', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=1454,
+  serialized_end=1534,
+)
+_sym_db.RegisterEnumDescriptor(_FACTORY2MESSAGE_NESTEDFACTORY2ENUM)
+
+_MESSAGEWITHNESTEDENUMONLY_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.MessageWithNestedEnumOnly.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='NESTED_MESSAGE_ENUM_0', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=1734,
+  serialized_end=1773,
+)
+_sym_db.RegisterEnumDescriptor(_MESSAGEWITHNESTEDENUMONLY_NESTEDENUM)
+
+
+_FACTORY2MESSAGE_NESTEDFACTORY2MESSAGE = _descriptor.Descriptor(
+  name='NestedFactory2Message',
+  full_name='google.protobuf.python.internal.Factory2Message.NestedFactory2Message',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.python.internal.Factory2Message.NestedFactory2Message.value', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1371,
+  serialized_end=1409,
+)
+
+_FACTORY2MESSAGE_GROUPED = _descriptor.Descriptor(
+  name='Grouped',
+  full_name='google.protobuf.python.internal.Factory2Message.Grouped',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='part_1', full_name='google.protobuf.python.internal.Factory2Message.Grouped.part_1', index=0,
+      number=13, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='part_2', full_name='google.protobuf.python.internal.Factory2Message.Grouped.part_2', index=1,
+      number=14, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1411,
+  serialized_end=1452,
+)
+
+_FACTORY2MESSAGE = _descriptor.Descriptor(
+  name='Factory2Message',
+  full_name='google.protobuf.python.internal.Factory2Message',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='mandatory', full_name='google.protobuf.python.internal.Factory2Message.mandatory', index=0,
+      number=1, type=5, cpp_type=1, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='factory_2_enum', full_name='google.protobuf.python.internal.Factory2Message.factory_2_enum', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_factory_2_enum', full_name='google.protobuf.python.internal.Factory2Message.nested_factory_2_enum', index=2,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_factory_2_message', full_name='google.protobuf.python.internal.Factory2Message.nested_factory_2_message', index=3,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='factory_1_message', full_name='google.protobuf.python.internal.Factory2Message.factory_1_message', index=4,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='factory_1_enum', full_name='google.protobuf.python.internal.Factory2Message.factory_1_enum', index=5,
+      number=6, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_factory_1_enum', full_name='google.protobuf.python.internal.Factory2Message.nested_factory_1_enum', index=6,
+      number=7, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_factory_1_message', full_name='google.protobuf.python.internal.Factory2Message.nested_factory_1_message', index=7,
+      number=8, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='circular_message', full_name='google.protobuf.python.internal.Factory2Message.circular_message', index=8,
+      number=9, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='scalar_value', full_name='google.protobuf.python.internal.Factory2Message.scalar_value', index=9,
+      number=10, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='list_value', full_name='google.protobuf.python.internal.Factory2Message.list_value', index=10,
+      number=11, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='grouped', full_name='google.protobuf.python.internal.Factory2Message.grouped', index=11,
+      number=12, type=10, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='loop', full_name='google.protobuf.python.internal.Factory2Message.loop', index=12,
+      number=15, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='int_with_default', full_name='google.protobuf.python.internal.Factory2Message.int_with_default', index=13,
+      number=16, type=5, cpp_type=1, label=1,
+      has_default_value=True, default_value=1776,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='double_with_default', full_name='google.protobuf.python.internal.Factory2Message.double_with_default', index=14,
+      number=17, type=1, cpp_type=5, label=1,
+      has_default_value=True, default_value=float(9.99),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_with_default', full_name='google.protobuf.python.internal.Factory2Message.string_with_default', index=15,
+      number=18, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"hello world".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bool_with_default', full_name='google.protobuf.python.internal.Factory2Message.bool_with_default', index=16,
+      number=19, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='enum_with_default', full_name='google.protobuf.python.internal.Factory2Message.enum_with_default', index=17,
+      number=20, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bytes_with_default', full_name='google.protobuf.python.internal.Factory2Message.bytes_with_default', index=18,
+      number=21, type=12, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"a\373\000c",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_int', full_name='google.protobuf.python.internal.Factory2Message.oneof_int', index=19,
+      number=22, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_string', full_name='google.protobuf.python.internal.Factory2Message.oneof_string', index=20,
+      number=23, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='one_more_field', full_name='google.protobuf.python.internal.Factory2Message.one_more_field', index=0,
+      number=1001, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[_FACTORY2MESSAGE_NESTEDFACTORY2MESSAGE, _FACTORY2MESSAGE_GROUPED, ],
+  enum_types=[
+    _FACTORY2MESSAGE_NESTEDFACTORY2ENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='oneof_field', full_name='google.protobuf.python.internal.Factory2Message.oneof_field',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=128,
+  serialized_end=1624,
+)
+
+
+_LOOPMESSAGE = _descriptor.Descriptor(
+  name='LoopMessage',
+  full_name='google.protobuf.python.internal.LoopMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='loop', full_name='google.protobuf.python.internal.LoopMessage.loop', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1626,
+  serialized_end=1703,
+)
+
+
+_MESSAGEWITHNESTEDENUMONLY = _descriptor.Descriptor(
+  name='MessageWithNestedEnumOnly',
+  full_name='google.protobuf.python.internal.MessageWithNestedEnumOnly',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _MESSAGEWITHNESTEDENUMONLY_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1705,
+  serialized_end=1773,
+)
+
+
+_MESSAGEWITHOPTION = _descriptor.Descriptor(
+  name='MessageWithOption',
+  full_name='google.protobuf.python.internal.MessageWithOption',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field1', full_name='google.protobuf.python.internal.MessageWithOption.field1', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\020\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1775,
+  serialized_end=1814,
+)
+
+_FACTORY2MESSAGE_NESTEDFACTORY2MESSAGE.containing_type = _FACTORY2MESSAGE
+_FACTORY2MESSAGE_GROUPED.containing_type = _FACTORY2MESSAGE
+_FACTORY2MESSAGE.fields_by_name['factory_2_enum'].enum_type = _FACTORY2ENUM
+_FACTORY2MESSAGE.fields_by_name['nested_factory_2_enum'].enum_type = _FACTORY2MESSAGE_NESTEDFACTORY2ENUM
+_FACTORY2MESSAGE.fields_by_name['nested_factory_2_message'].message_type = _FACTORY2MESSAGE_NESTEDFACTORY2MESSAGE
+_FACTORY2MESSAGE.fields_by_name['factory_1_message'].message_type = google_dot_protobuf_dot_internal_dot_factory__test1__pb2._FACTORY1MESSAGE
+_FACTORY2MESSAGE.fields_by_name['factory_1_enum'].enum_type = google_dot_protobuf_dot_internal_dot_factory__test1__pb2._FACTORY1ENUM
+_FACTORY2MESSAGE.fields_by_name['nested_factory_1_enum'].enum_type = google_dot_protobuf_dot_internal_dot_factory__test1__pb2._FACTORY1MESSAGE_NESTEDFACTORY1ENUM
+_FACTORY2MESSAGE.fields_by_name['nested_factory_1_message'].message_type = google_dot_protobuf_dot_internal_dot_factory__test1__pb2._FACTORY1MESSAGE_NESTEDFACTORY1MESSAGE
+_FACTORY2MESSAGE.fields_by_name['circular_message'].message_type = _FACTORY2MESSAGE
+_FACTORY2MESSAGE.fields_by_name['grouped'].message_type = _FACTORY2MESSAGE_GROUPED
+_FACTORY2MESSAGE.fields_by_name['loop'].message_type = _LOOPMESSAGE
+_FACTORY2MESSAGE.fields_by_name['enum_with_default'].enum_type = _FACTORY2ENUM
+_FACTORY2MESSAGE_NESTEDFACTORY2ENUM.containing_type = _FACTORY2MESSAGE
+_FACTORY2MESSAGE.oneofs_by_name['oneof_field'].fields.append(
+  _FACTORY2MESSAGE.fields_by_name['oneof_int'])
+_FACTORY2MESSAGE.fields_by_name['oneof_int'].containing_oneof = _FACTORY2MESSAGE.oneofs_by_name['oneof_field']
+_FACTORY2MESSAGE.oneofs_by_name['oneof_field'].fields.append(
+  _FACTORY2MESSAGE.fields_by_name['oneof_string'])
+_FACTORY2MESSAGE.fields_by_name['oneof_string'].containing_oneof = _FACTORY2MESSAGE.oneofs_by_name['oneof_field']
+_LOOPMESSAGE.fields_by_name['loop'].message_type = _FACTORY2MESSAGE
+_MESSAGEWITHNESTEDENUMONLY_NESTEDENUM.containing_type = _MESSAGEWITHNESTEDENUMONLY
+DESCRIPTOR.message_types_by_name['Factory2Message'] = _FACTORY2MESSAGE
+DESCRIPTOR.message_types_by_name['LoopMessage'] = _LOOPMESSAGE
+DESCRIPTOR.message_types_by_name['MessageWithNestedEnumOnly'] = _MESSAGEWITHNESTEDENUMONLY
+DESCRIPTOR.message_types_by_name['MessageWithOption'] = _MESSAGEWITHOPTION
+DESCRIPTOR.enum_types_by_name['Factory2Enum'] = _FACTORY2ENUM
+DESCRIPTOR.extensions_by_name['another_field'] = another_field
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Factory2Message = _reflection.GeneratedProtocolMessageType('Factory2Message', (_message.Message,), {
+
+  'NestedFactory2Message' : _reflection.GeneratedProtocolMessageType('NestedFactory2Message', (_message.Message,), {
+    'DESCRIPTOR' : _FACTORY2MESSAGE_NESTEDFACTORY2MESSAGE,
+    '__module__' : 'google.protobuf.internal.factory_test2_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.Factory2Message.NestedFactory2Message)
+    })
+  ,
+
+  'Grouped' : _reflection.GeneratedProtocolMessageType('Grouped', (_message.Message,), {
+    'DESCRIPTOR' : _FACTORY2MESSAGE_GROUPED,
+    '__module__' : 'google.protobuf.internal.factory_test2_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.Factory2Message.Grouped)
+    })
+  ,
+  'DESCRIPTOR' : _FACTORY2MESSAGE,
+  '__module__' : 'google.protobuf.internal.factory_test2_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.Factory2Message)
+  })
+_sym_db.RegisterMessage(Factory2Message)
+_sym_db.RegisterMessage(Factory2Message.NestedFactory2Message)
+_sym_db.RegisterMessage(Factory2Message.Grouped)
+
+LoopMessage = _reflection.GeneratedProtocolMessageType('LoopMessage', (_message.Message,), {
+  'DESCRIPTOR' : _LOOPMESSAGE,
+  '__module__' : 'google.protobuf.internal.factory_test2_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.LoopMessage)
+  })
+_sym_db.RegisterMessage(LoopMessage)
+
+MessageWithNestedEnumOnly = _reflection.GeneratedProtocolMessageType('MessageWithNestedEnumOnly', (_message.Message,), {
+  'DESCRIPTOR' : _MESSAGEWITHNESTEDENUMONLY,
+  '__module__' : 'google.protobuf.internal.factory_test2_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.MessageWithNestedEnumOnly)
+  })
+_sym_db.RegisterMessage(MessageWithNestedEnumOnly)
+
+MessageWithOption = _reflection.GeneratedProtocolMessageType('MessageWithOption', (_message.Message,), {
+  'DESCRIPTOR' : _MESSAGEWITHOPTION,
+  '__module__' : 'google.protobuf.internal.factory_test2_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.MessageWithOption)
+  })
+_sym_db.RegisterMessage(MessageWithOption)
+
+google_dot_protobuf_dot_internal_dot_factory__test1__pb2.Factory1Message.RegisterExtension(another_field)
+google_dot_protobuf_dot_internal_dot_factory__test1__pb2.Factory1Message.RegisterExtension(_FACTORY2MESSAGE.extensions_by_name['one_more_field'])
+
+_MESSAGEWITHOPTION._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/file_options_test_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/file_options_test_pb2.py
new file mode 100644
index 0000000..41f28fd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/file_options_test_pb2.py
@@ -0,0 +1,83 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/file_options_test.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import descriptor_pb2 as google_dot_protobuf_dot_descriptor__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/file_options_test.proto',
+  package='google.protobuf.python.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n0google/protobuf/internal/file_options_test.proto\x12\x1fgoogle.protobuf.python.internal\x1a google/protobuf/descriptor.proto\"\x1e\n\nFooOptions\x12\x10\n\x08\x66oo_name\x18\x01 \x01(\t:a\n\x0b\x66oo_options\x12\x1c.google.protobuf.FileOptions\x18\xac\xec\xb6\x39 \x01(\x0b\x32+.google.protobuf.python.internal.FooOptions'
+  ,
+  dependencies=[google_dot_protobuf_dot_descriptor__pb2.DESCRIPTOR,])
+
+
+FOO_OPTIONS_FIELD_NUMBER = 120436268
+foo_options = _descriptor.FieldDescriptor(
+  name='foo_options', full_name='google.protobuf.python.internal.foo_options', index=0,
+  number=120436268, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+
+_FOOOPTIONS = _descriptor.Descriptor(
+  name='FooOptions',
+  full_name='google.protobuf.python.internal.FooOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='foo_name', full_name='google.protobuf.python.internal.FooOptions.foo_name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=119,
+  serialized_end=149,
+)
+
+DESCRIPTOR.message_types_by_name['FooOptions'] = _FOOOPTIONS
+DESCRIPTOR.extensions_by_name['foo_options'] = foo_options
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+FooOptions = _reflection.GeneratedProtocolMessageType('FooOptions', (_message.Message,), {
+  'DESCRIPTOR' : _FOOOPTIONS,
+  '__module__' : 'google.protobuf.internal.file_options_test_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.FooOptions)
+  })
+_sym_db.RegisterMessage(FooOptions)
+
+foo_options.message_type = _FOOOPTIONS
+google_dot_protobuf_dot_descriptor__pb2.FileOptions.RegisterExtension(foo_options)
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/generator_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/generator_test.py
new file mode 100644
index 0000000..ab16d17
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/generator_test.py
@@ -0,0 +1,359 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# TODO(robinson): Flesh this out considerably.  We focused on reflection_test.py
+# first, since it's testing the subtler code, and since it provides decent
+# indirect testing of the protocol compiler output.
+
+"""Unittest that directly tests the output of the pure-Python protocol
+compiler.  See //google/protobuf/internal/reflection_test.py for a test which
+further ensures that we can use Python protocol message objects as we expect.
+"""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf.internal import test_bad_identifiers_pb2
+from google.protobuf import unittest_custom_options_pb2
+from google.protobuf import unittest_import_pb2
+from google.protobuf import unittest_import_public_pb2
+from google.protobuf import unittest_mset_pb2
+from google.protobuf import unittest_mset_wire_format_pb2
+from google.protobuf import unittest_no_generic_services_pb2
+from google.protobuf import unittest_pb2
+from google.protobuf import service
+from google.protobuf import symbol_database
+
+MAX_EXTENSION = 536870912
+
+
+class GeneratorTest(unittest.TestCase):
+
+  def testNestedMessageDescriptor(self):
+    field_name = 'optional_nested_message'
+    proto_type = unittest_pb2.TestAllTypes
+    self.assertEqual(
+        proto_type.NestedMessage.DESCRIPTOR,
+        proto_type.DESCRIPTOR.fields_by_name[field_name].message_type)
+
+  def testEnums(self):
+    # We test only module-level enums here.
+    # TODO(robinson): Examine descriptors directly to check
+    # enum descriptor output.
+    self.assertEqual(4, unittest_pb2.FOREIGN_FOO)
+    self.assertEqual(5, unittest_pb2.FOREIGN_BAR)
+    self.assertEqual(6, unittest_pb2.FOREIGN_BAZ)
+
+    proto = unittest_pb2.TestAllTypes()
+    self.assertEqual(1, proto.FOO)
+    self.assertEqual(1, unittest_pb2.TestAllTypes.FOO)
+    self.assertEqual(2, proto.BAR)
+    self.assertEqual(2, unittest_pb2.TestAllTypes.BAR)
+    self.assertEqual(3, proto.BAZ)
+    self.assertEqual(3, unittest_pb2.TestAllTypes.BAZ)
+
+  def testExtremeDefaultValues(self):
+    message = unittest_pb2.TestExtremeDefaultValues()
+
+    # Python pre-2.6 does not have isinf() or isnan() functions, so we have
+    # to provide our own.
+    def isnan(val):
+      # NaN is never equal to itself.
+      return val != val
+    def isinf(val):
+      # Infinity times zero equals NaN.
+      return not isnan(val) and isnan(val * 0)
+
+    self.assertTrue(isinf(message.inf_double))
+    self.assertTrue(message.inf_double > 0)
+    self.assertTrue(isinf(message.neg_inf_double))
+    self.assertTrue(message.neg_inf_double < 0)
+    self.assertTrue(isnan(message.nan_double))
+
+    self.assertTrue(isinf(message.inf_float))
+    self.assertTrue(message.inf_float > 0)
+    self.assertTrue(isinf(message.neg_inf_float))
+    self.assertTrue(message.neg_inf_float < 0)
+    self.assertTrue(isnan(message.nan_float))
+    self.assertEqual("? ? ?? ?? ??? ??/ ??-", message.cpp_trigraph)
+
+  def testHasDefaultValues(self):
+    desc = unittest_pb2.TestAllTypes.DESCRIPTOR
+
+    expected_has_default_by_name = {
+        'optional_int32': False,
+        'repeated_int32': False,
+        'optional_nested_message': False,
+        'default_int32': True,
+    }
+
+    has_default_by_name = dict(
+        [(f.name, f.has_default_value)
+         for f in desc.fields
+         if f.name in expected_has_default_by_name])
+    self.assertEqual(expected_has_default_by_name, has_default_by_name)
+
+  def testContainingTypeBehaviorForExtensions(self):
+    self.assertEqual(unittest_pb2.optional_int32_extension.containing_type,
+                     unittest_pb2.TestAllExtensions.DESCRIPTOR)
+    self.assertEqual(unittest_pb2.TestRequired.single.containing_type,
+                     unittest_pb2.TestAllExtensions.DESCRIPTOR)
+
+  def testExtensionScope(self):
+    self.assertEqual(unittest_pb2.optional_int32_extension.extension_scope,
+                     None)
+    self.assertEqual(unittest_pb2.TestRequired.single.extension_scope,
+                     unittest_pb2.TestRequired.DESCRIPTOR)
+
+  def testIsExtension(self):
+    self.assertTrue(unittest_pb2.optional_int32_extension.is_extension)
+    self.assertTrue(unittest_pb2.TestRequired.single.is_extension)
+
+    message_descriptor = unittest_pb2.TestRequired.DESCRIPTOR
+    non_extension_descriptor = message_descriptor.fields_by_name['a']
+    self.assertTrue(not non_extension_descriptor.is_extension)
+
+  def testOptions(self):
+    proto = unittest_mset_wire_format_pb2.TestMessageSet()
+    self.assertTrue(proto.DESCRIPTOR.GetOptions().message_set_wire_format)
+
+  def testMessageWithCustomOptions(self):
+    proto = unittest_custom_options_pb2.TestMessageWithCustomOptions()
+    enum_options = proto.DESCRIPTOR.enum_types_by_name['AnEnum'].GetOptions()
+    self.assertTrue(enum_options is not None)
+    # TODO(gps): We really should test for the presence of the enum_opt1
+    # extension and for its value to be set to -789.
+
+  def testNestedTypes(self):
+    self.assertEqual(
+        set(unittest_pb2.TestAllTypes.DESCRIPTOR.nested_types),
+        set([
+            unittest_pb2.TestAllTypes.NestedMessage.DESCRIPTOR,
+            unittest_pb2.TestAllTypes.OptionalGroup.DESCRIPTOR,
+            unittest_pb2.TestAllTypes.RepeatedGroup.DESCRIPTOR,
+        ]))
+    self.assertEqual(unittest_pb2.TestEmptyMessage.DESCRIPTOR.nested_types, [])
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.NestedMessage.DESCRIPTOR.nested_types, [])
+
+  def testContainingType(self):
+    self.assertTrue(
+        unittest_pb2.TestEmptyMessage.DESCRIPTOR.containing_type is None)
+    self.assertTrue(
+        unittest_pb2.TestAllTypes.DESCRIPTOR.containing_type is None)
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.NestedMessage.DESCRIPTOR.containing_type,
+        unittest_pb2.TestAllTypes.DESCRIPTOR)
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.NestedMessage.DESCRIPTOR.containing_type,
+        unittest_pb2.TestAllTypes.DESCRIPTOR)
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.RepeatedGroup.DESCRIPTOR.containing_type,
+        unittest_pb2.TestAllTypes.DESCRIPTOR)
+
+  def testContainingTypeInEnumDescriptor(self):
+    self.assertTrue(unittest_pb2._FOREIGNENUM.containing_type is None)
+    self.assertEqual(unittest_pb2._TESTALLTYPES_NESTEDENUM.containing_type,
+                     unittest_pb2.TestAllTypes.DESCRIPTOR)
+
+  def testPackage(self):
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.DESCRIPTOR.file.package,
+        'protobuf_unittest')
+    desc = unittest_pb2.TestAllTypes.NestedMessage.DESCRIPTOR
+    self.assertEqual(desc.file.package, 'protobuf_unittest')
+    self.assertEqual(
+        unittest_import_pb2.ImportMessage.DESCRIPTOR.file.package,
+        'protobuf_unittest_import')
+
+    self.assertEqual(
+        unittest_pb2._FOREIGNENUM.file.package, 'protobuf_unittest')
+    self.assertEqual(
+        unittest_pb2._TESTALLTYPES_NESTEDENUM.file.package,
+        'protobuf_unittest')
+    self.assertEqual(
+        unittest_import_pb2._IMPORTENUM.file.package,
+        'protobuf_unittest_import')
+
+  def testExtensionRange(self):
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.DESCRIPTOR.extension_ranges, [])
+    self.assertEqual(
+        unittest_pb2.TestAllExtensions.DESCRIPTOR.extension_ranges,
+        [(1, MAX_EXTENSION)])
+    self.assertEqual(
+        unittest_pb2.TestMultipleExtensionRanges.DESCRIPTOR.extension_ranges,
+        [(42, 43), (4143, 4244), (65536, MAX_EXTENSION)])
+
+  def testFileDescriptor(self):
+    self.assertEqual(unittest_pb2.DESCRIPTOR.name,
+                     'google/protobuf/unittest.proto')
+    self.assertEqual(unittest_pb2.DESCRIPTOR.package, 'protobuf_unittest')
+    self.assertFalse(unittest_pb2.DESCRIPTOR.serialized_pb is None)
+    self.assertEqual(unittest_pb2.DESCRIPTOR.dependencies,
+                     [unittest_import_pb2.DESCRIPTOR])
+    self.assertEqual(unittest_import_pb2.DESCRIPTOR.dependencies,
+                     [unittest_import_public_pb2.DESCRIPTOR])
+    self.assertEqual(unittest_import_pb2.DESCRIPTOR.public_dependencies,
+                     [unittest_import_public_pb2.DESCRIPTOR])
+  def testNoGenericServices(self):
+    self.assertTrue(hasattr(unittest_no_generic_services_pb2, "TestMessage"))
+    self.assertTrue(hasattr(unittest_no_generic_services_pb2, "FOO"))
+    self.assertTrue(hasattr(unittest_no_generic_services_pb2, "test_extension"))
+
+    # Make sure unittest_no_generic_services_pb2 has no services subclassing
+    # Proto2 Service class.
+    if hasattr(unittest_no_generic_services_pb2, "TestService"):
+      self.assertFalse(issubclass(unittest_no_generic_services_pb2.TestService,
+                                  service.Service))
+
+  def testMessageTypesByName(self):
+    file_type = unittest_pb2.DESCRIPTOR
+    self.assertEqual(
+        unittest_pb2._TESTALLTYPES,
+        file_type.message_types_by_name[unittest_pb2._TESTALLTYPES.name])
+
+    # Nested messages shouldn't be included in the message_types_by_name
+    # dictionary (like in the C++ API).
+    self.assertFalse(
+        unittest_pb2._TESTALLTYPES_NESTEDMESSAGE.name in
+        file_type.message_types_by_name)
+
+  def testEnumTypesByName(self):
+    file_type = unittest_pb2.DESCRIPTOR
+    self.assertEqual(
+        unittest_pb2._FOREIGNENUM,
+        file_type.enum_types_by_name[unittest_pb2._FOREIGNENUM.name])
+
+  def testExtensionsByName(self):
+    file_type = unittest_pb2.DESCRIPTOR
+    self.assertEqual(
+        unittest_pb2.my_extension_string,
+        file_type.extensions_by_name[unittest_pb2.my_extension_string.name])
+
+  def testPublicImports(self):
+    # Test public imports as embedded message.
+    all_type_proto = unittest_pb2.TestAllTypes()
+    self.assertEqual(0, all_type_proto.optional_public_import_message.e)
+
+    # PublicImportMessage is actually defined in unittest_import_public_pb2
+    # module, and is public imported by unittest_import_pb2 module.
+    public_import_proto = unittest_import_pb2.PublicImportMessage()
+    self.assertEqual(0, public_import_proto.e)
+    self.assertTrue(unittest_import_public_pb2.PublicImportMessage is
+                    unittest_import_pb2.PublicImportMessage)
+
+  def testBadIdentifiers(self):
+    # We're just testing that the code was imported without problems.
+    message = test_bad_identifiers_pb2.TestBadIdentifiers()
+    self.assertEqual(message.Extensions[test_bad_identifiers_pb2.message],
+                     "foo")
+    self.assertEqual(message.Extensions[test_bad_identifiers_pb2.descriptor],
+                     "bar")
+    self.assertEqual(message.Extensions[test_bad_identifiers_pb2.reflection],
+                     "baz")
+    self.assertEqual(message.Extensions[test_bad_identifiers_pb2.service],
+                     "qux")
+
+  def testOneof(self):
+    desc = unittest_pb2.TestAllTypes.DESCRIPTOR
+    self.assertEqual(1, len(desc.oneofs))
+    self.assertEqual('oneof_field', desc.oneofs[0].name)
+    self.assertEqual(0, desc.oneofs[0].index)
+    self.assertIs(desc, desc.oneofs[0].containing_type)
+    self.assertIs(desc.oneofs[0], desc.oneofs_by_name['oneof_field'])
+    nested_names = set(['oneof_uint32', 'oneof_nested_message',
+                        'oneof_string', 'oneof_bytes'])
+    self.assertEqual(
+        nested_names,
+        set([field.name for field in desc.oneofs[0].fields]))
+    for field_name, field_desc in desc.fields_by_name.items():
+      if field_name in nested_names:
+        self.assertIs(desc.oneofs[0], field_desc.containing_oneof)
+      else:
+        self.assertIsNone(field_desc.containing_oneof)
+
+  def testEnumWithDupValue(self):
+    self.assertEqual('FOO1',
+                     unittest_pb2.TestEnumWithDupValue.Name(unittest_pb2.FOO1))
+    self.assertEqual('FOO1',
+                     unittest_pb2.TestEnumWithDupValue.Name(unittest_pb2.FOO2))
+    self.assertEqual('BAR1',
+                     unittest_pb2.TestEnumWithDupValue.Name(unittest_pb2.BAR1))
+    self.assertEqual('BAR1',
+                     unittest_pb2.TestEnumWithDupValue.Name(unittest_pb2.BAR2))
+
+
+class SymbolDatabaseRegistrationTest(unittest.TestCase):
+  """Checks that messages, enums and files are correctly registered."""
+
+  def testGetSymbol(self):
+    self.assertEqual(
+        unittest_pb2.TestAllTypes, symbol_database.Default().GetSymbol(
+            'protobuf_unittest.TestAllTypes'))
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.NestedMessage,
+        symbol_database.Default().GetSymbol(
+            'protobuf_unittest.TestAllTypes.NestedMessage'))
+    with self.assertRaises(KeyError):
+      symbol_database.Default().GetSymbol('protobuf_unittest.NestedMessage')
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.OptionalGroup,
+        symbol_database.Default().GetSymbol(
+            'protobuf_unittest.TestAllTypes.OptionalGroup'))
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.RepeatedGroup,
+        symbol_database.Default().GetSymbol(
+            'protobuf_unittest.TestAllTypes.RepeatedGroup'))
+
+  def testEnums(self):
+    self.assertEqual(
+        'protobuf_unittest.ForeignEnum',
+        symbol_database.Default().pool.FindEnumTypeByName(
+            'protobuf_unittest.ForeignEnum').full_name)
+    self.assertEqual(
+        'protobuf_unittest.TestAllTypes.NestedEnum',
+        symbol_database.Default().pool.FindEnumTypeByName(
+            'protobuf_unittest.TestAllTypes.NestedEnum').full_name)
+
+  def testFindFileByName(self):
+    self.assertEqual(
+        'google/protobuf/unittest.proto',
+        symbol_database.Default().pool.FindFileByName(
+            'google/protobuf/unittest.proto').name)
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/__init__.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/__init__.py
new file mode 100644
index 0000000..5121dd0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/__init__.py
@@ -0,0 +1,33 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Sample module importing a nested proto from itself."""
+
+from google.protobuf.internal.import_test_package import outer_pb2 as myproto
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/inner_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/inner_pb2.py
new file mode 100644
index 0000000..05b067e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/inner_pb2.py
@@ -0,0 +1,70 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/import_test_package/inner.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/import_test_package/inner.proto',
+  package='google.protobuf.python.internal.import_test_package',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n8google/protobuf/internal/import_test_package/inner.proto\x12\x33google.protobuf.python.internal.import_test_package\"\x1a\n\x05Inner\x12\x11\n\x05value\x18\x01 \x01(\x05:\x02\x35\x37'
+)
+
+
+
+
+_INNER = _descriptor.Descriptor(
+  name='Inner',
+  full_name='google.protobuf.python.internal.import_test_package.Inner',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.python.internal.import_test_package.Inner.value', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=True, default_value=57,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=113,
+  serialized_end=139,
+)
+
+DESCRIPTOR.message_types_by_name['Inner'] = _INNER
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Inner = _reflection.GeneratedProtocolMessageType('Inner', (_message.Message,), {
+  'DESCRIPTOR' : _INNER,
+  '__module__' : 'google.protobuf.internal.import_test_package.inner_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.import_test_package.Inner)
+  })
+_sym_db.RegisterMessage(Inner)
+
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/outer_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/outer_pb2.py
new file mode 100644
index 0000000..7cce73a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/import_test_package/outer_pb2.py
@@ -0,0 +1,73 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/import_test_package/outer.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf.internal.import_test_package import inner_pb2 as google_dot_protobuf_dot_internal_dot_import__test__package_dot_inner__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/import_test_package/outer.proto',
+  package='google.protobuf.python.internal.import_test_package',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n8google/protobuf/internal/import_test_package/outer.proto\x12\x33google.protobuf.python.internal.import_test_package\x1a\x38google/protobuf/internal/import_test_package/inner.proto\"R\n\x05Outer\x12I\n\x05inner\x18\x01 \x01(\x0b\x32:.google.protobuf.python.internal.import_test_package.Inner'
+  ,
+  dependencies=[google_dot_protobuf_dot_internal_dot_import__test__package_dot_inner__pb2.DESCRIPTOR,])
+
+
+
+
+_OUTER = _descriptor.Descriptor(
+  name='Outer',
+  full_name='google.protobuf.python.internal.import_test_package.Outer',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='inner', full_name='google.protobuf.python.internal.import_test_package.Outer.inner', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=171,
+  serialized_end=253,
+)
+
+_OUTER.fields_by_name['inner'].message_type = google_dot_protobuf_dot_internal_dot_import__test__package_dot_inner__pb2._INNER
+DESCRIPTOR.message_types_by_name['Outer'] = _OUTER
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Outer = _reflection.GeneratedProtocolMessageType('Outer', (_message.Message,), {
+  'DESCRIPTOR' : _OUTER,
+  '__module__' : 'google.protobuf.internal.import_test_package.outer_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.import_test_package.Outer)
+  })
+_sym_db.RegisterMessage(Outer)
+
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/json_format_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/json_format_test.py
new file mode 100644
index 0000000..68aa21c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/json_format_test.py
@@ -0,0 +1,1249 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Test for google.protobuf.json_format."""
+
+__author__ = 'jieluo@google.com (Jie Luo)'
+
+import json
+import math
+import struct
+import sys
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import any_pb2
+from google.protobuf import duration_pb2
+from google.protobuf import field_mask_pb2
+from google.protobuf import struct_pb2
+from google.protobuf import timestamp_pb2
+from google.protobuf import wrappers_pb2
+from google.protobuf import any_test_pb2
+from google.protobuf import unittest_mset_pb2
+from google.protobuf import unittest_pb2
+from google.protobuf.internal import test_proto3_optional_pb2
+from google.protobuf import descriptor_pool
+from google.protobuf import json_format
+from google.protobuf.util import json_format_pb2
+from google.protobuf.util import json_format_proto3_pb2
+
+
+class JsonFormatBase(unittest.TestCase):
+
+  def FillAllFields(self, message):
+    message.int32_value = 20
+    message.int64_value = -20
+    message.uint32_value = 3120987654
+    message.uint64_value = 12345678900
+    message.float_value = float('-inf')
+    message.double_value = 3.1415
+    message.bool_value = True
+    message.string_value = 'foo'
+    message.bytes_value = b'bar'
+    message.message_value.value = 10
+    message.enum_value = json_format_proto3_pb2.BAR
+    # Repeated
+    message.repeated_int32_value.append(0x7FFFFFFF)
+    message.repeated_int32_value.append(-2147483648)
+    message.repeated_int64_value.append(9007199254740992)
+    message.repeated_int64_value.append(-9007199254740992)
+    message.repeated_uint32_value.append(0xFFFFFFF)
+    message.repeated_uint32_value.append(0x7FFFFFF)
+    message.repeated_uint64_value.append(9007199254740992)
+    message.repeated_uint64_value.append(9007199254740991)
+    message.repeated_float_value.append(0)
+
+    message.repeated_double_value.append(1E-15)
+    message.repeated_double_value.append(float('inf'))
+    message.repeated_bool_value.append(True)
+    message.repeated_bool_value.append(False)
+    message.repeated_string_value.append('Few symbols!#$,;')
+    message.repeated_string_value.append('bar')
+    message.repeated_bytes_value.append(b'foo')
+    message.repeated_bytes_value.append(b'bar')
+    message.repeated_message_value.add().value = 10
+    message.repeated_message_value.add().value = 11
+    message.repeated_enum_value.append(json_format_proto3_pb2.FOO)
+    message.repeated_enum_value.append(json_format_proto3_pb2.BAR)
+    self.message = message
+
+  def CheckParseBack(self, message, parsed_message):
+    json_format.Parse(json_format.MessageToJson(message),
+                      parsed_message)
+    self.assertEqual(message, parsed_message)
+
+  def CheckError(self, text, error_message):
+    message = json_format_proto3_pb2.TestMessage()
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        error_message,
+        json_format.Parse, text, message)
+
+
+class JsonFormatTest(JsonFormatBase):
+
+  def testEmptyMessageToJson(self):
+    message = json_format_proto3_pb2.TestMessage()
+    self.assertEqual(json_format.MessageToJson(message),
+                     '{}')
+    parsed_message = json_format_proto3_pb2.TestMessage()
+    self.CheckParseBack(message, parsed_message)
+
+  def testPartialMessageToJson(self):
+    message = json_format_proto3_pb2.TestMessage(
+        string_value='test',
+        repeated_int32_value=[89, 4])
+    self.assertEqual(json.loads(json_format.MessageToJson(message)),
+                     json.loads('{"stringValue": "test", '
+                                '"repeatedInt32Value": [89, 4]}'))
+    parsed_message = json_format_proto3_pb2.TestMessage()
+    self.CheckParseBack(message, parsed_message)
+
+  def testAllFieldsToJson(self):
+    message = json_format_proto3_pb2.TestMessage()
+    text = ('{"int32Value": 20, '
+            '"int64Value": "-20", '
+            '"uint32Value": 3120987654,'
+            '"uint64Value": "12345678900",'
+            '"floatValue": "-Infinity",'
+            '"doubleValue": 3.1415,'
+            '"boolValue": true,'
+            '"stringValue": "foo",'
+            '"bytesValue": "YmFy",'
+            '"messageValue": {"value": 10},'
+            '"enumValue": "BAR",'
+            '"repeatedInt32Value": [2147483647, -2147483648],'
+            '"repeatedInt64Value": ["9007199254740992", "-9007199254740992"],'
+            '"repeatedUint32Value": [268435455, 134217727],'
+            '"repeatedUint64Value": ["9007199254740992", "9007199254740991"],'
+            '"repeatedFloatValue": [0],'
+            '"repeatedDoubleValue": [1e-15, "Infinity"],'
+            '"repeatedBoolValue": [true, false],'
+            '"repeatedStringValue": ["Few symbols!#$,;", "bar"],'
+            '"repeatedBytesValue": ["Zm9v", "YmFy"],'
+            '"repeatedMessageValue": [{"value": 10}, {"value": 11}],'
+            '"repeatedEnumValue": ["FOO", "BAR"]'
+            '}')
+    self.FillAllFields(message)
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message)),
+        json.loads(text))
+    parsed_message = json_format_proto3_pb2.TestMessage()
+    json_format.Parse(text, parsed_message)
+    self.assertEqual(message, parsed_message)
+
+  def testUnknownEnumToJsonAndBack(self):
+    text = '{\n  "enumValue": 999\n}'
+    message = json_format_proto3_pb2.TestMessage()
+    message.enum_value = 999
+    self.assertEqual(json_format.MessageToJson(message),
+                     text)
+    parsed_message = json_format_proto3_pb2.TestMessage()
+    json_format.Parse(text, parsed_message)
+    self.assertEqual(message, parsed_message)
+
+  def testExtensionToJsonAndBack(self):
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    ext1 = unittest_mset_pb2.TestMessageSetExtension1.message_set_extension
+    ext2 = unittest_mset_pb2.TestMessageSetExtension2.message_set_extension
+    message.message_set.Extensions[ext1].i = 23
+    message.message_set.Extensions[ext2].str = 'foo'
+    message_text = json_format.MessageToJson(
+        message
+    )
+    parsed_message = unittest_mset_pb2.TestMessageSetContainer()
+    json_format.Parse(message_text, parsed_message)
+    self.assertEqual(message, parsed_message)
+
+  def testExtensionErrors(self):
+    self.CheckError('{"[extensionField]": {}}',
+                    'Message type proto3.TestMessage does not have extensions')
+
+  def testExtensionToDictAndBack(self):
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    ext1 = unittest_mset_pb2.TestMessageSetExtension1.message_set_extension
+    ext2 = unittest_mset_pb2.TestMessageSetExtension2.message_set_extension
+    message.message_set.Extensions[ext1].i = 23
+    message.message_set.Extensions[ext2].str = 'foo'
+    message_dict = json_format.MessageToDict(
+        message
+    )
+    parsed_message = unittest_mset_pb2.TestMessageSetContainer()
+    json_format.ParseDict(message_dict, parsed_message)
+    self.assertEqual(message, parsed_message)
+
+  def testExtensionToDictAndBackWithScalar(self):
+    message = unittest_pb2.TestAllExtensions()
+    ext1 = unittest_pb2.TestNestedExtension.test
+    message.Extensions[ext1] = 'data'
+    message_dict = json_format.MessageToDict(
+        message
+    )
+    parsed_message = unittest_pb2.TestAllExtensions()
+    json_format.ParseDict(message_dict, parsed_message)
+    self.assertEqual(message, parsed_message)
+
+  def testJsonParseDictToAnyDoesNotAlterInput(self):
+    orig_dict = {
+        'int32Value': 20,
+        '@type': 'type.googleapis.com/proto3.TestMessage'
+    }
+    copied_dict = json.loads(json.dumps(orig_dict))
+    parsed_message = any_pb2.Any()
+    json_format.ParseDict(copied_dict, parsed_message)
+    self.assertEqual(copied_dict, orig_dict)
+
+  def testExtensionSerializationDictMatchesProto3Spec(self):
+    """See go/proto3-json-spec for spec.
+    """
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    ext1 = unittest_mset_pb2.TestMessageSetExtension1.message_set_extension
+    ext2 = unittest_mset_pb2.TestMessageSetExtension2.message_set_extension
+    message.message_set.Extensions[ext1].i = 23
+    message.message_set.Extensions[ext2].str = 'foo'
+    message_dict = json_format.MessageToDict(
+        message
+    )
+    golden_dict = {
+        'messageSet': {
+            '[protobuf_unittest.'
+            'TestMessageSetExtension1.message_set_extension]': {
+                'i': 23,
+            },
+            '[protobuf_unittest.'
+            'TestMessageSetExtension2.message_set_extension]': {
+                'str': u'foo',
+            },
+        },
+    }
+    self.assertEqual(golden_dict, message_dict)
+    parsed_msg = unittest_mset_pb2.TestMessageSetContainer()
+    json_format.ParseDict(golden_dict, parsed_msg)
+    self.assertEqual(message, parsed_msg)
+
+  def testExtensionSerializationDictMatchesProto3SpecMore(self):
+    """See go/proto3-json-spec for spec.
+    """
+    message = json_format_pb2.TestMessageWithExtension()
+    ext = json_format_pb2.TestExtension.ext
+    message.Extensions[ext].value = 'stuff'
+    message_dict = json_format.MessageToDict(
+        message
+    )
+    expected_dict = {
+        '[protobuf_unittest.TestExtension.ext]': {
+            'value': u'stuff',
+        },
+    }
+    self.assertEqual(expected_dict, message_dict)
+
+  def testExtensionSerializationJsonMatchesProto3Spec(self):
+    """See go/proto3-json-spec for spec.
+    """
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    ext1 = unittest_mset_pb2.TestMessageSetExtension1.message_set_extension
+    ext2 = unittest_mset_pb2.TestMessageSetExtension2.message_set_extension
+    message.message_set.Extensions[ext1].i = 23
+    message.message_set.Extensions[ext2].str = 'foo'
+    message_text = json_format.MessageToJson(
+        message
+    )
+    ext1_text = ('protobuf_unittest.TestMessageSetExtension1.'
+                 'message_set_extension')
+    ext2_text = ('protobuf_unittest.TestMessageSetExtension2.'
+                 'message_set_extension')
+    golden_text = ('{"messageSet": {'
+                   '    "[%s]": {'
+                   '        "i": 23'
+                   '    },'
+                   '    "[%s]": {'
+                   '        "str": "foo"'
+                   '    }'
+                   '}}') % (ext1_text, ext2_text)
+    self.assertEqual(json.loads(golden_text), json.loads(message_text))
+
+  def testJsonEscapeString(self):
+    message = json_format_proto3_pb2.TestMessage()
+    if sys.version_info[0] < 3:
+      message.string_value = '&\n<\"\r>\b\t\f\\\001/\xe2\x80\xa8\xe2\x80\xa9'
+    else:
+      message.string_value = '&\n<\"\r>\b\t\f\\\001/'
+      message.string_value += (b'\xe2\x80\xa8\xe2\x80\xa9').decode('utf-8')
+    self.assertEqual(
+        json_format.MessageToJson(message),
+        '{\n  "stringValue": '
+        '"&\\n<\\\"\\r>\\b\\t\\f\\\\\\u0001/\\u2028\\u2029"\n}')
+    parsed_message = json_format_proto3_pb2.TestMessage()
+    self.CheckParseBack(message, parsed_message)
+    text = u'{"int32Value": "\u0031"}'
+    json_format.Parse(text, message)
+    self.assertEqual(message.int32_value, 1)
+
+  def testAlwaysSeriliaze(self):
+    message = json_format_proto3_pb2.TestMessage(
+        string_value='foo')
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads('{'
+                   '"repeatedStringValue": [],'
+                   '"stringValue": "foo",'
+                   '"repeatedBoolValue": [],'
+                   '"repeatedUint32Value": [],'
+                   '"repeatedInt32Value": [],'
+                   '"enumValue": "FOO",'
+                   '"int32Value": 0,'
+                   '"floatValue": 0,'
+                   '"int64Value": "0",'
+                   '"uint32Value": 0,'
+                   '"repeatedBytesValue": [],'
+                   '"repeatedUint64Value": [],'
+                   '"repeatedDoubleValue": [],'
+                   '"bytesValue": "",'
+                   '"boolValue": false,'
+                   '"repeatedEnumValue": [],'
+                   '"uint64Value": "0",'
+                   '"doubleValue": 0,'
+                   '"repeatedFloatValue": [],'
+                   '"repeatedInt64Value": [],'
+                   '"repeatedMessageValue": []}'))
+    parsed_message = json_format_proto3_pb2.TestMessage()
+    self.CheckParseBack(message, parsed_message)
+
+  def testProto3Optional(self):
+    message = test_proto3_optional_pb2.TestProto3Optional()
+    self.assertEqual(
+        json.loads(
+            json_format.MessageToJson(
+                message, including_default_value_fields=True)),
+        json.loads('{}'))
+    message.optional_int32 = 0
+    self.assertEqual(
+        json.loads(
+            json_format.MessageToJson(
+                message, including_default_value_fields=True)),
+        json.loads('{"optionalInt32": 0}'))
+
+  def testIntegersRepresentedAsFloat(self):
+    message = json_format_proto3_pb2.TestMessage()
+    json_format.Parse('{"int32Value": -2.147483648e9}', message)
+    self.assertEqual(message.int32_value, -2147483648)
+    json_format.Parse('{"int32Value": 1e5}', message)
+    self.assertEqual(message.int32_value, 100000)
+    json_format.Parse('{"int32Value": 1.0}', message)
+    self.assertEqual(message.int32_value, 1)
+
+  def testMapFields(self):
+    message = json_format_proto3_pb2.TestNestedMap()
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads('{'
+                   '"boolMap": {},'
+                   '"int32Map": {},'
+                   '"int64Map": {},'
+                   '"uint32Map": {},'
+                   '"uint64Map": {},'
+                   '"stringMap": {},'
+                   '"mapMap": {}'
+                   '}'))
+    message.bool_map[True] = 1
+    message.bool_map[False] = 2
+    message.int32_map[1] = 2
+    message.int32_map[2] = 3
+    message.int64_map[1] = 2
+    message.int64_map[2] = 3
+    message.uint32_map[1] = 2
+    message.uint32_map[2] = 3
+    message.uint64_map[1] = 2
+    message.uint64_map[2] = 3
+    message.string_map['1'] = 2
+    message.string_map['null'] = 3
+    message.map_map['1'].bool_map[True] = 3
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, False)),
+        json.loads('{'
+                   '"boolMap": {"false": 2, "true": 1},'
+                   '"int32Map": {"1": 2, "2": 3},'
+                   '"int64Map": {"1": 2, "2": 3},'
+                   '"uint32Map": {"1": 2, "2": 3},'
+                   '"uint64Map": {"1": 2, "2": 3},'
+                   '"stringMap": {"1": 2, "null": 3},'
+                   '"mapMap": {"1": {"boolMap": {"true": 3}}}'
+                   '}'))
+    parsed_message = json_format_proto3_pb2.TestNestedMap()
+    self.CheckParseBack(message, parsed_message)
+
+  def testOneofFields(self):
+    message = json_format_proto3_pb2.TestOneof()
+    # Always print does not affect oneof fields.
+    self.assertEqual(
+        json_format.MessageToJson(message, True),
+        '{}')
+    message.oneof_int32_value = 0
+    self.assertEqual(
+        json_format.MessageToJson(message, True),
+        '{\n'
+        '  "oneofInt32Value": 0\n'
+        '}')
+    parsed_message = json_format_proto3_pb2.TestOneof()
+    self.CheckParseBack(message, parsed_message)
+
+  def testSurrogates(self):
+    # Test correct surrogate handling.
+    message = json_format_proto3_pb2.TestMessage()
+    json_format.Parse('{"stringValue": "\\uD83D\\uDE01"}', message)
+    self.assertEqual(message.string_value,
+                     b'\xF0\x9F\x98\x81'.decode('utf-8', 'strict'))
+
+    # Error case: unpaired high surrogate.
+    self.CheckError(
+        '{"stringValue": "\\uD83D"}',
+        r'Invalid \\uXXXX escape|Unpaired.*surrogate')
+
+    # Unpaired low surrogate.
+    self.CheckError(
+        '{"stringValue": "\\uDE01"}',
+        r'Invalid \\uXXXX escape|Unpaired.*surrogate')
+
+  def testTimestampMessage(self):
+    message = json_format_proto3_pb2.TestTimestamp()
+    message.value.seconds = 0
+    message.value.nanos = 0
+    message.repeated_value.add().seconds = 20
+    message.repeated_value[0].nanos = 1
+    message.repeated_value.add().seconds = 0
+    message.repeated_value[1].nanos = 10000
+    message.repeated_value.add().seconds = 100000000
+    message.repeated_value[2].nanos = 0
+    # Maximum time
+    message.repeated_value.add().seconds = 253402300799
+    message.repeated_value[3].nanos = 999999999
+    # Minimum time
+    message.repeated_value.add().seconds = -62135596800
+    message.repeated_value[4].nanos = 0
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads('{'
+                   '"value": "1970-01-01T00:00:00Z",'
+                   '"repeatedValue": ['
+                   '  "1970-01-01T00:00:20.000000001Z",'
+                   '  "1970-01-01T00:00:00.000010Z",'
+                   '  "1973-03-03T09:46:40Z",'
+                   '  "9999-12-31T23:59:59.999999999Z",'
+                   '  "0001-01-01T00:00:00Z"'
+                   ']'
+                   '}'))
+    parsed_message = json_format_proto3_pb2.TestTimestamp()
+    self.CheckParseBack(message, parsed_message)
+    text = (r'{"value": "1970-01-01T00:00:00.01+08:00",'
+            r'"repeatedValue":['
+            r'  "1970-01-01T00:00:00.01+08:30",'
+            r'  "1970-01-01T00:00:00.01-01:23"]}')
+    json_format.Parse(text, parsed_message)
+    self.assertEqual(parsed_message.value.seconds, -8 * 3600)
+    self.assertEqual(parsed_message.value.nanos, 10000000)
+    self.assertEqual(parsed_message.repeated_value[0].seconds, -8.5 * 3600)
+    self.assertEqual(parsed_message.repeated_value[1].seconds, 3600 + 23 * 60)
+
+  def testDurationMessage(self):
+    message = json_format_proto3_pb2.TestDuration()
+    message.value.seconds = 1
+    message.repeated_value.add().seconds = 0
+    message.repeated_value[0].nanos = 10
+    message.repeated_value.add().seconds = -1
+    message.repeated_value[1].nanos = -1000
+    message.repeated_value.add().seconds = 10
+    message.repeated_value[2].nanos = 11000000
+    message.repeated_value.add().seconds = -315576000000
+    message.repeated_value.add().seconds = 315576000000
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads('{'
+                   '"value": "1s",'
+                   '"repeatedValue": ['
+                   '  "0.000000010s",'
+                   '  "-1.000001s",'
+                   '  "10.011s",'
+                   '  "-315576000000s",'
+                   '  "315576000000s"'
+                   ']'
+                   '}'))
+    parsed_message = json_format_proto3_pb2.TestDuration()
+    self.CheckParseBack(message, parsed_message)
+
+  def testFieldMaskMessage(self):
+    message = json_format_proto3_pb2.TestFieldMask()
+    message.value.paths.append('foo.bar')
+    message.value.paths.append('bar')
+    self.assertEqual(
+        json_format.MessageToJson(message, True),
+        '{\n'
+        '  "value": "foo.bar,bar"\n'
+        '}')
+    parsed_message = json_format_proto3_pb2.TestFieldMask()
+    self.CheckParseBack(message, parsed_message)
+
+    message.value.Clear()
+    self.assertEqual(
+        json_format.MessageToJson(message, True),
+        '{\n'
+        '  "value": ""\n'
+        '}')
+    self.CheckParseBack(message, parsed_message)
+
+  def testWrapperMessage(self):
+    message = json_format_proto3_pb2.TestWrapper()
+    message.bool_value.value = False
+    message.int32_value.value = 0
+    message.string_value.value = ''
+    message.bytes_value.value = b''
+    message.repeated_bool_value.add().value = True
+    message.repeated_bool_value.add().value = False
+    message.repeated_int32_value.add()
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads('{\n'
+                   '  "int32Value": 0,'
+                   '  "boolValue": false,'
+                   '  "stringValue": "",'
+                   '  "bytesValue": "",'
+                   '  "repeatedBoolValue": [true, false],'
+                   '  "repeatedInt32Value": [0],'
+                   '  "repeatedUint32Value": [],'
+                   '  "repeatedFloatValue": [],'
+                   '  "repeatedDoubleValue": [],'
+                   '  "repeatedBytesValue": [],'
+                   '  "repeatedInt64Value": [],'
+                   '  "repeatedUint64Value": [],'
+                   '  "repeatedStringValue": []'
+                   '}'))
+    parsed_message = json_format_proto3_pb2.TestWrapper()
+    self.CheckParseBack(message, parsed_message)
+
+  def testStructMessage(self):
+    message = json_format_proto3_pb2.TestStruct()
+    message.value['name'] = 'Jim'
+    message.value['age'] = 10
+    message.value['attend'] = True
+    message.value['email'] = None
+    message.value.get_or_create_struct('address')['city'] = 'SFO'
+    message.value['address']['house_number'] = 1024
+    message.value.get_or_create_struct('empty_struct')
+    message.value.get_or_create_list('empty_list')
+    struct_list = message.value.get_or_create_list('list')
+    struct_list.extend([6, 'seven', True, False, None])
+    struct_list.add_struct()['subkey2'] = 9
+    message.repeated_value.add()['age'] = 11
+    message.repeated_value.add()
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, False)),
+        json.loads(
+            '{'
+            '  "value": {'
+            '    "address": {'
+            '      "city": "SFO", '
+            '      "house_number": 1024'
+            '    }, '
+            '    "empty_struct": {}, '
+            '    "empty_list": [], '
+            '    "age": 10, '
+            '    "name": "Jim", '
+            '    "attend": true, '
+            '    "email": null, '
+            '    "list": [6, "seven", true, false, null, {"subkey2": 9}]'
+            '  },'
+            '  "repeatedValue": [{"age": 11}, {}]'
+            '}'))
+    parsed_message = json_format_proto3_pb2.TestStruct()
+    self.CheckParseBack(message, parsed_message)
+    # check for regression; this used to raise
+    parsed_message.value['empty_struct']
+    parsed_message.value['empty_list']
+
+  def testValueMessage(self):
+    message = json_format_proto3_pb2.TestValue()
+    message.value.string_value = 'hello'
+    message.repeated_value.add().number_value = 11.1
+    message.repeated_value.add().bool_value = False
+    message.repeated_value.add().null_value = 0
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, False)),
+        json.loads(
+            '{'
+            '  "value": "hello",'
+            '  "repeatedValue": [11.1, false, null]'
+            '}'))
+    parsed_message = json_format_proto3_pb2.TestValue()
+    self.CheckParseBack(message, parsed_message)
+    # Can't parse back if the Value message is not set.
+    message.repeated_value.add()
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, False)),
+        json.loads(
+            '{'
+            '  "value": "hello",'
+            '  "repeatedValue": [11.1, false, null, null]'
+            '}'))
+    message.Clear()
+    json_format.Parse('{"value": null}', message)
+    self.assertEqual(message.value.WhichOneof('kind'), 'null_value')
+
+  def testListValueMessage(self):
+    message = json_format_proto3_pb2.TestListValue()
+    message.value.values.add().number_value = 11.1
+    message.value.values.add().null_value = 0
+    message.value.values.add().bool_value = True
+    message.value.values.add().string_value = 'hello'
+    message.value.values.add().struct_value['name'] = 'Jim'
+    message.repeated_value.add().values.add().number_value = 1
+    message.repeated_value.add()
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, False)),
+        json.loads(
+            '{"value": [11.1, null, true, "hello", {"name": "Jim"}]\n,'
+            '"repeatedValue": [[1], []]}'))
+    parsed_message = json_format_proto3_pb2.TestListValue()
+    self.CheckParseBack(message, parsed_message)
+
+  def testAnyMessage(self):
+    message = json_format_proto3_pb2.TestAny()
+    value1 = json_format_proto3_pb2.MessageType()
+    value2 = json_format_proto3_pb2.MessageType()
+    value1.value = 1234
+    value2.value = 5678
+    message.value.Pack(value1)
+    message.repeated_value.add().Pack(value1)
+    message.repeated_value.add().Pack(value2)
+    message.repeated_value.add()
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads(
+            '{\n'
+            '  "repeatedValue": [ {\n'
+            '    "@type": "type.googleapis.com/proto3.MessageType",\n'
+            '    "value": 1234\n'
+            '  }, {\n'
+            '    "@type": "type.googleapis.com/proto3.MessageType",\n'
+            '    "value": 5678\n'
+            '  },\n'
+            '  {}],\n'
+            '  "value": {\n'
+            '    "@type": "type.googleapis.com/proto3.MessageType",\n'
+            '    "value": 1234\n'
+            '  }\n'
+            '}\n'))
+    parsed_message = json_format_proto3_pb2.TestAny()
+    self.CheckParseBack(message, parsed_message)
+    # Must print @type first
+    test_message = json_format_proto3_pb2.TestMessage(
+        bool_value=True,
+        int32_value=20,
+        int64_value=-20,
+        uint32_value=20,
+        uint64_value=20,
+        double_value=3.14,
+        string_value='foo')
+    message.Clear()
+    message.value.Pack(test_message)
+    self.assertEqual(
+        json_format.MessageToJson(message, False)[0:68],
+        '{\n'
+        '  "value": {\n'
+        '    "@type": "type.googleapis.com/proto3.TestMessage"')
+
+  def testAnyMessageDescriptorPoolMissingType(self):
+    packed_message = unittest_pb2.OneString()
+    packed_message.data = 'string'
+    message = any_test_pb2.TestAny()
+    message.any_value.Pack(packed_message)
+    empty_pool = descriptor_pool.DescriptorPool()
+    with self.assertRaises(TypeError) as cm:
+      json_format.MessageToJson(message, True, descriptor_pool=empty_pool)
+    self.assertEqual(
+        'Can not find message descriptor by type_url:'
+        ' type.googleapis.com/protobuf_unittest.OneString.',
+        str(cm.exception))
+
+  def testWellKnownInAnyMessage(self):
+    message = any_pb2.Any()
+    int32_value = wrappers_pb2.Int32Value()
+    int32_value.value = 1234
+    message.Pack(int32_value)
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads(
+            '{\n'
+            '  "@type": \"type.googleapis.com/google.protobuf.Int32Value\",\n'
+            '  "value": 1234\n'
+            '}\n'))
+    parsed_message = any_pb2.Any()
+    self.CheckParseBack(message, parsed_message)
+
+    timestamp = timestamp_pb2.Timestamp()
+    message.Pack(timestamp)
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads(
+            '{\n'
+            '  "@type": "type.googleapis.com/google.protobuf.Timestamp",\n'
+            '  "value": "1970-01-01T00:00:00Z"\n'
+            '}\n'))
+    self.CheckParseBack(message, parsed_message)
+
+    duration = duration_pb2.Duration()
+    duration.seconds = 1
+    message.Pack(duration)
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads(
+            '{\n'
+            '  "@type": "type.googleapis.com/google.protobuf.Duration",\n'
+            '  "value": "1s"\n'
+            '}\n'))
+    self.CheckParseBack(message, parsed_message)
+
+    field_mask = field_mask_pb2.FieldMask()
+    field_mask.paths.append('foo.bar')
+    field_mask.paths.append('bar')
+    message.Pack(field_mask)
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads(
+            '{\n'
+            '  "@type": "type.googleapis.com/google.protobuf.FieldMask",\n'
+            '  "value": "foo.bar,bar"\n'
+            '}\n'))
+    self.CheckParseBack(message, parsed_message)
+
+    struct_message = struct_pb2.Struct()
+    struct_message['name'] = 'Jim'
+    message.Pack(struct_message)
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads(
+            '{\n'
+            '  "@type": "type.googleapis.com/google.protobuf.Struct",\n'
+            '  "value": {"name": "Jim"}\n'
+            '}\n'))
+    self.CheckParseBack(message, parsed_message)
+
+    nested_any = any_pb2.Any()
+    int32_value.value = 5678
+    nested_any.Pack(int32_value)
+    message.Pack(nested_any)
+    self.assertEqual(
+        json.loads(json_format.MessageToJson(message, True)),
+        json.loads(
+            '{\n'
+            '  "@type": "type.googleapis.com/google.protobuf.Any",\n'
+            '  "value": {\n'
+            '    "@type": "type.googleapis.com/google.protobuf.Int32Value",\n'
+            '    "value": 5678\n'
+            '  }\n'
+            '}\n'))
+    self.CheckParseBack(message, parsed_message)
+
+  def testParseNull(self):
+    message = json_format_proto3_pb2.TestMessage()
+    parsed_message = json_format_proto3_pb2.TestMessage()
+    self.FillAllFields(parsed_message)
+    json_format.Parse('{"int32Value": null, '
+                      '"int64Value": null, '
+                      '"uint32Value": null,'
+                      '"uint64Value": null,'
+                      '"floatValue": null,'
+                      '"doubleValue": null,'
+                      '"boolValue": null,'
+                      '"stringValue": null,'
+                      '"bytesValue": null,'
+                      '"messageValue": null,'
+                      '"enumValue": null,'
+                      '"repeatedInt32Value": null,'
+                      '"repeatedInt64Value": null,'
+                      '"repeatedUint32Value": null,'
+                      '"repeatedUint64Value": null,'
+                      '"repeatedFloatValue": null,'
+                      '"repeatedDoubleValue": null,'
+                      '"repeatedBoolValue": null,'
+                      '"repeatedStringValue": null,'
+                      '"repeatedBytesValue": null,'
+                      '"repeatedMessageValue": null,'
+                      '"repeatedEnumValue": null'
+                      '}',
+                      parsed_message)
+    self.assertEqual(message, parsed_message)
+    # Null and {} should have different behavior for sub message.
+    self.assertFalse(parsed_message.HasField('message_value'))
+    json_format.Parse('{"messageValue": {}}', parsed_message)
+    self.assertTrue(parsed_message.HasField('message_value'))
+    # Null is not allowed to be used as an element in repeated field.
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'Failed to parse repeatedInt32Value field: '
+        'null is not allowed to be used as an element in a repeated field.',
+        json_format.Parse,
+        '{"repeatedInt32Value":[1, null]}',
+        parsed_message)
+    self.CheckError('{"repeatedMessageValue":[null]}',
+                    'Failed to parse repeatedMessageValue field: null is not'
+                    ' allowed to be used as an element in a repeated field.')
+
+  def testNanFloat(self):
+    message = json_format_proto3_pb2.TestMessage()
+    message.float_value = float('nan')
+    text = '{\n  "floatValue": "NaN"\n}'
+    self.assertEqual(json_format.MessageToJson(message), text)
+    parsed_message = json_format_proto3_pb2.TestMessage()
+    json_format.Parse(text, parsed_message)
+    self.assertTrue(math.isnan(parsed_message.float_value))
+
+  def testParseDoubleToFloat(self):
+    message = json_format_proto3_pb2.TestMessage()
+    text = ('{"repeatedDoubleValue": [3.4028235e+39, 1.4028235e-39]\n}')
+    json_format.Parse(text, message)
+    self.assertEqual(message.repeated_double_value[0], 3.4028235e+39)
+    self.assertEqual(message.repeated_double_value[1], 1.4028235e-39)
+    text = ('{"repeatedFloatValue": [3.4028235e+39, 1.4028235e-39]\n}')
+    self.CheckError(text,
+                    'Failed to parse repeatedFloatValue field: '
+                    'Float value too large.')
+
+  def testFloatPrecision(self):
+    message = json_format_proto3_pb2.TestMessage()
+    message.float_value = 1.123456789
+    # Set to 8 valid digits.
+    text = '{\n  "floatValue": 1.1234568\n}'
+    self.assertEqual(
+        json_format.MessageToJson(message, float_precision=8), text)
+    # Set to 7 valid digits.
+    text = '{\n  "floatValue": 1.123457\n}'
+    self.assertEqual(
+        json_format.MessageToJson(message, float_precision=7), text)
+
+    # Default float_precision will automatic print shortest float.
+    message.float_value = 1.1000000011
+    text = '{\n  "floatValue": 1.1\n}'
+    self.assertEqual(
+        json_format.MessageToJson(message), text)
+    message.float_value = 1.00000075e-36
+    text = '{\n  "floatValue": 1.00000075e-36\n}'
+    self.assertEqual(
+        json_format.MessageToJson(message), text)
+    message.float_value = 12345678912345e+11
+    text = '{\n  "floatValue": 1.234568e+24\n}'
+    self.assertEqual(
+        json_format.MessageToJson(message), text)
+
+    # Test a bunch of data and check json encode/decode do not
+    # lose precision
+    value_list = [0x00, 0xD8, 0x6E, 0x00]
+    msg2 = json_format_proto3_pb2.TestMessage()
+    for a in range(0, 256):
+      value_list[3] = a
+      for b in range(0, 256):
+        value_list[0] = b
+        byte_array = bytearray(value_list)
+        message.float_value = struct.unpack('<f', byte_array)[0]
+        self.CheckParseBack(message, msg2)
+
+  def testParseEmptyText(self):
+    self.CheckError('',
+                    r'Failed to load JSON: (Expecting value)|(No JSON).')
+
+  def testParseEnumValue(self):
+    message = json_format_proto3_pb2.TestMessage()
+    text = '{"enumValue": 0}'
+    json_format.Parse(text, message)
+    text = '{"enumValue": 1}'
+    json_format.Parse(text, message)
+    self.CheckError(
+        '{"enumValue": "baz"}',
+        'Failed to parse enumValue field: Invalid enum value baz '
+        'for enum type proto3.EnumType.')
+    # Proto3 accepts numeric unknown enums.
+    text = '{"enumValue": 12345}'
+    json_format.Parse(text, message)
+    # Proto2 does not accept unknown enums.
+    message = unittest_pb2.TestAllTypes()
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'Failed to parse optionalNestedEnum field: Invalid enum value 12345 '
+        'for enum type protobuf_unittest.TestAllTypes.NestedEnum.',
+        json_format.Parse, '{"optionalNestedEnum": 12345}', message)
+
+  def testBytes(self):
+    message = json_format_proto3_pb2.TestMessage()
+    # Test url base64
+    text = '{"bytesValue": "-_"}'
+    json_format.Parse(text, message)
+    self.assertEqual(message.bytes_value, b'\xfb')
+    # Test padding
+    text = '{"bytesValue": "AQI="}'
+    json_format.Parse(text, message)
+    self.assertEqual(message.bytes_value, b'\x01\x02')
+    text = '{"bytesValue": "AQI"}'
+    json_format.Parse(text, message)
+    self.assertEqual(message.bytes_value, b'\x01\x02')
+    text = '{"bytesValue": "AQI*"}'
+    json_format.Parse(text, message)
+    self.assertEqual(message.bytes_value, b'\x01\x02')
+
+  def testParseBadIdentifer(self):
+    self.CheckError('{int32Value: 1}',
+                    (r'Failed to load JSON: Expecting property name'
+                     r'( enclosed in double quotes)?: line 1'))
+    self.CheckError('{"unknownName": 1}',
+                    'Message type "proto3.TestMessage" has no field named '
+                    '"unknownName".')
+
+  def testIgnoreUnknownField(self):
+    text = '{"unknownName": 1}'
+    parsed_message = json_format_proto3_pb2.TestMessage()
+    json_format.Parse(text, parsed_message, ignore_unknown_fields=True)
+    text = ('{\n'
+            '  "repeatedValue": [ {\n'
+            '    "@type": "type.googleapis.com/proto3.MessageType",\n'
+            '    "unknownName": 1\n'
+            '  }]\n'
+            '}\n')
+    parsed_message = json_format_proto3_pb2.TestAny()
+    json_format.Parse(text, parsed_message, ignore_unknown_fields=True)
+
+  def testDuplicateField(self):
+    self.CheckError('{"int32Value": 1,\n"int32Value":2}',
+                    'Failed to load JSON: duplicate key int32Value.')
+
+  def testInvalidBoolValue(self):
+    self.CheckError('{"boolValue": 1}',
+                    'Failed to parse boolValue field: '
+                    'Expected true or false without quotes.')
+    self.CheckError('{"boolValue": "true"}',
+                    'Failed to parse boolValue field: '
+                    'Expected true or false without quotes.')
+
+  def testInvalidIntegerValue(self):
+    message = json_format_proto3_pb2.TestMessage()
+    text = '{"int32Value": 0x12345}'
+    self.assertRaises(json_format.ParseError,
+                      json_format.Parse, text, message)
+    self.CheckError('{"int32Value": 1.5}',
+                    'Failed to parse int32Value field: '
+                    'Couldn\'t parse integer: 1.5.')
+    self.CheckError('{"int32Value": 012345}',
+                    (r'Failed to load JSON: Expecting \'?,\'? delimiter: '
+                     r'line 1.'))
+    self.CheckError('{"int32Value": " 1 "}',
+                    'Failed to parse int32Value field: '
+                    'Couldn\'t parse integer: " 1 ".')
+    self.CheckError('{"int32Value": "1 "}',
+                    'Failed to parse int32Value field: '
+                    'Couldn\'t parse integer: "1 ".')
+    self.CheckError('{"int32Value": false}',
+                    'Failed to parse int32Value field: Bool value False '
+                    'is not acceptable for integer field.')
+    self.CheckError('{"int32Value": 12345678901234567890}',
+                    'Failed to parse int32Value field: Value out of range: '
+                    '12345678901234567890.')
+    self.CheckError('{"uint32Value": -1}',
+                    'Failed to parse uint32Value field: '
+                    'Value out of range: -1.')
+
+  def testInvalidFloatValue(self):
+    self.CheckError('{"floatValue": "nan"}',
+                    'Failed to parse floatValue field: Couldn\'t '
+                    'parse float "nan", use "NaN" instead.')
+    self.CheckError('{"floatValue": NaN}',
+                    'Failed to parse floatValue field: Couldn\'t '
+                    'parse NaN, use quoted "NaN" instead.')
+    self.CheckError('{"floatValue": Infinity}',
+                    'Failed to parse floatValue field: Couldn\'t parse Infinity'
+                    ' or value too large, use quoted "Infinity" instead.')
+    self.CheckError('{"floatValue": -Infinity}',
+                    'Failed to parse floatValue field: Couldn\'t parse '
+                    '-Infinity or value too small, '
+                    'use quoted "-Infinity" instead.')
+    self.CheckError('{"doubleValue": -1.89769e+308}',
+                    'Failed to parse doubleValue field: Couldn\'t parse '
+                    '-Infinity or value too small, '
+                    'use quoted "-Infinity" instead.')
+    self.CheckError('{"floatValue": 3.4028235e+39}',
+                    'Failed to parse floatValue field: Float value too large.')
+    self.CheckError('{"floatValue": -3.502823e+38}',
+                    'Failed to parse floatValue field: Float value too small.')
+
+  def testInvalidRepeated(self):
+    self.CheckError('{"repeatedInt32Value": 12345}',
+                    (r'Failed to parse repeatedInt32Value field: repeated field'
+                     r' repeatedInt32Value must be in \[\] which is 12345.'))
+
+  def testInvalidMap(self):
+    message = json_format_proto3_pb2.TestMap()
+    text = '{"int32Map": {"null": 2, "2": 3}}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'Failed to parse int32Map field: invalid literal',
+        json_format.Parse, text, message)
+    text = '{"int32Map": {1: 2, "2": 3}}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        (r'Failed to load JSON: Expecting property name'
+         r'( enclosed in double quotes)?: line 1'),
+        json_format.Parse, text, message)
+    text = '{"boolMap": {"null": 1}}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'Failed to parse boolMap field: Expected "true" or "false", not null.',
+        json_format.Parse, text, message)
+    if sys.version_info < (2, 7):
+      return
+    text = r'{"stringMap": {"a": 3, "\u0061": 2}}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'Failed to load JSON: duplicate key a',
+        json_format.Parse, text, message)
+    text = r'{"stringMap": 0}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'Failed to parse stringMap field: Map field string_map must be '
+        'in a dict which is 0.',
+        json_format.Parse, text, message)
+
+  def testInvalidTimestamp(self):
+    message = json_format_proto3_pb2.TestTimestamp()
+    text = '{"value": "10000-01-01T00:00:00.00Z"}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'Failed to parse value field: '
+        'time data \'10000-01-01T00:00:00\' does not match'
+        ' format \'%Y-%m-%dT%H:%M:%S\'.',
+        json_format.Parse, text, message)
+    text = '{"value": "1970-01-01T00:00:00.0123456789012Z"}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'nanos 0123456789012 more than 9 fractional digits.',
+        json_format.Parse, text, message)
+    text = '{"value": "1972-01-01T01:00:00.01+08"}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        (r'Invalid timezone offset value: \+08.'),
+        json_format.Parse, text, message)
+    # Time smaller than minimum time.
+    text = '{"value": "0000-01-01T00:00:00Z"}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'Failed to parse value field: year (0 )?is out of range.',
+        json_format.Parse, text, message)
+    # Time bigger than maxinum time.
+    message.value.seconds = 253402300800
+    self.assertRaisesRegexp(
+        OverflowError,
+        'date value out of range',
+        json_format.MessageToJson, message)
+    # Lower case t does not accept.
+    text = '{"value": "0001-01-01t00:00:00Z"}'
+    with self.assertRaises(json_format.ParseError) as e:
+      json_format.Parse(text, message)
+    self.assertEqual(
+        'Failed to parse value field: '
+        'time data \'0001-01-01t00:00:00\' does not match format '
+        '\'%Y-%m-%dT%H:%M:%S\', lowercase \'t\' is not accepted.',
+        str(e.exception))
+
+  def testInvalidOneof(self):
+    message = json_format_proto3_pb2.TestOneof()
+    text = '{"oneofInt32Value": 1, "oneofStringValue": "2"}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'Message type "proto3.TestOneof"'
+        ' should not have multiple "oneof_value" oneof fields.',
+        json_format.Parse, text, message)
+
+  def testInvalidListValue(self):
+    message = json_format_proto3_pb2.TestListValue()
+    text = '{"value": 1234}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        r'Failed to parse value field: ListValue must be in \[\] which is 1234',
+        json_format.Parse, text, message)
+
+  def testInvalidStruct(self):
+    message = json_format_proto3_pb2.TestStruct()
+    text = '{"value": 1234}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        'Failed to parse value field: Struct must be in a dict which is 1234',
+        json_format.Parse, text, message)
+
+  def testInvalidAny(self):
+    message = any_pb2.Any()
+    text = '{"@type": "type.googleapis.com/google.protobuf.Int32Value"}'
+    self.assertRaisesRegexp(
+        KeyError,
+        'value',
+        json_format.Parse, text, message)
+    text = '{"value": 1234}'
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        '@type is missing when parsing any message.',
+        json_format.Parse, text, message)
+    text = '{"@type": "type.googleapis.com/MessageNotExist", "value": 1234}'
+    self.assertRaisesRegexp(
+        TypeError,
+        'Can not find message descriptor by type_url: '
+        'type.googleapis.com/MessageNotExist.',
+        json_format.Parse, text, message)
+    # Only last part is to be used: b/25630112
+    text = (r'{"@type": "incorrect.googleapis.com/google.protobuf.Int32Value",'
+            r'"value": 1234}')
+    json_format.Parse(text, message)
+
+  def testPreservingProtoFieldNames(self):
+    message = json_format_proto3_pb2.TestMessage()
+    message.int32_value = 12345
+    self.assertEqual('{\n  "int32Value": 12345\n}',
+                     json_format.MessageToJson(message))
+    self.assertEqual('{\n  "int32_value": 12345\n}',
+                     json_format.MessageToJson(message, False, True))
+    # When including_default_value_fields is True.
+    message = json_format_proto3_pb2.TestTimestamp()
+    self.assertEqual('{\n  "repeatedValue": []\n}',
+                     json_format.MessageToJson(message, True, False))
+    self.assertEqual('{\n  "repeated_value": []\n}',
+                     json_format.MessageToJson(message, True, True))
+
+    # Parsers accept both original proto field names and lowerCamelCase names.
+    message = json_format_proto3_pb2.TestMessage()
+    json_format.Parse('{"int32Value": 54321}', message)
+    self.assertEqual(54321, message.int32_value)
+    json_format.Parse('{"int32_value": 12345}', message)
+    self.assertEqual(12345, message.int32_value)
+
+  def testIndent(self):
+    message = json_format_proto3_pb2.TestMessage()
+    message.int32_value = 12345
+    self.assertEqual('{\n"int32Value": 12345\n}',
+                     json_format.MessageToJson(message, indent=0))
+
+  def testFormatEnumsAsInts(self):
+    message = json_format_proto3_pb2.TestMessage()
+    message.enum_value = json_format_proto3_pb2.BAR
+    message.repeated_enum_value.append(json_format_proto3_pb2.FOO)
+    message.repeated_enum_value.append(json_format_proto3_pb2.BAR)
+    self.assertEqual(json.loads('{\n'
+                                '  "enumValue": 1,\n'
+                                '  "repeatedEnumValue": [0, 1]\n'
+                                '}\n'),
+                     json.loads(json_format.MessageToJson(
+                         message, use_integers_for_enums=True)))
+
+  def testParseDict(self):
+    expected = 12345
+    js_dict = {'int32Value': expected}
+    message = json_format_proto3_pb2.TestMessage()
+    json_format.ParseDict(js_dict, message)
+    self.assertEqual(expected, message.int32_value)
+
+  def testParseDictAnyDescriptorPoolMissingType(self):
+    # Confirm that ParseDict does not raise ParseError with default pool
+    js_dict = {
+        'any_value': {
+            '@type': 'type.googleapis.com/proto3.MessageType',
+            'value': 1234
+        }
+    }
+    json_format.ParseDict(js_dict, any_test_pb2.TestAny())
+    # Check ParseDict raises ParseError with empty pool
+    js_dict = {
+        'any_value': {
+            '@type': 'type.googleapis.com/proto3.MessageType',
+            'value': 1234
+        }
+    }
+    with self.assertRaises(json_format.ParseError) as cm:
+      empty_pool = descriptor_pool.DescriptorPool()
+      json_format.ParseDict(js_dict,
+                            any_test_pb2.TestAny(),
+                            descriptor_pool=empty_pool)
+    self.assertEqual(
+        str(cm.exception),
+        'Failed to parse any_value field: Can not find message descriptor by'
+        ' type_url: type.googleapis.com/proto3.MessageType..')
+
+  def testParseDictUnknownValueType(self):
+    class UnknownClass(object):
+
+      def __str__(self):
+        return 'v'
+    message = json_format_proto3_pb2.TestValue()
+    self.assertRaisesRegexp(
+        json_format.ParseError,
+        r"Value v has unexpected type <class '.*\.UnknownClass'>.",
+        json_format.ParseDict,
+        {'value': UnknownClass()},
+        message)
+
+  def testMessageToDict(self):
+    message = json_format_proto3_pb2.TestMessage()
+    message.int32_value = 12345
+    expected = {'int32Value': 12345}
+    self.assertEqual(expected,
+                     json_format.MessageToDict(message))
+
+  def testJsonName(self):
+    message = json_format_proto3_pb2.TestCustomJsonName()
+    message.value = 12345
+    self.assertEqual('{\n  "@value": 12345\n}',
+                     json_format.MessageToJson(message))
+    parsed_message = json_format_proto3_pb2.TestCustomJsonName()
+    self.CheckParseBack(message, parsed_message)
+
+  def testSortKeys(self):
+    # Testing sort_keys is not perfectly working, as by random luck we could
+    # get the output sorted. We just use a selection of names.
+    message = json_format_proto3_pb2.TestMessage(bool_value=True,
+                                                 int32_value=1,
+                                                 int64_value=3,
+                                                 uint32_value=4,
+                                                 string_value='bla')
+    self.assertEqual(
+        json_format.MessageToJson(message, sort_keys=True),
+        # We use json.dumps() instead of a hardcoded string due to differences
+        # between Python 2 and Python 3.
+        json.dumps({'boolValue': True, 'int32Value': 1, 'int64Value': '3',
+                    'uint32Value': 4, 'stringValue': 'bla'},
+                   indent=2, sort_keys=True))
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/keywords_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/keywords_test.py
new file mode 100644
index 0000000..8744928
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/keywords_test.py
@@ -0,0 +1,105 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests for google.protobuf.internal.keywords."""
+
+import unittest
+
+
+from google.protobuf.internal import more_messages_pb2
+from google.protobuf import descriptor_pool
+
+
+class KeywordsConflictTest(unittest.TestCase):
+
+  def setUp(self):
+    super(KeywordsConflictTest, self).setUp()
+    self.pool = descriptor_pool.Default()
+
+  def testMessage(self):
+    message = getattr(more_messages_pb2, 'class')()
+    message.int_field = 123
+    self.assertEqual(message.int_field, 123)
+    des = self.pool.FindMessageTypeByName('google.protobuf.internal.class')
+    self.assertEqual(des.name, 'class')
+
+  def testNestedMessage(self):
+    message = getattr(more_messages_pb2, 'class')()
+    message.nested_message.field = 234
+    self.assertEqual(message.nested_message.field, 234)
+    des = self.pool.FindMessageTypeByName('google.protobuf.internal.class.try')
+    self.assertEqual(des.name, 'try')
+
+  def testField(self):
+    message = getattr(more_messages_pb2, 'class')()
+    setattr(message, 'if', 123)
+    setattr(message, 'as', 1)
+    self.assertEqual(getattr(message, 'if'), 123)
+    self.assertEqual(getattr(message, 'as'), 1)
+
+  def testEnum(self):
+    class_ = getattr(more_messages_pb2, 'class')
+    message = class_()
+    # Normal enum value.
+    message.enum_field = more_messages_pb2.default
+    self.assertEqual(message.enum_field, more_messages_pb2.default)
+    # Top level enum value.
+    message.enum_field = getattr(more_messages_pb2, 'else')
+    self.assertEqual(message.enum_field, 1)
+    # Nested enum value
+    message.nested_enum_field = getattr(class_, 'True')
+    self.assertEqual(message.nested_enum_field, 1)
+
+  def testExtension(self):
+    message = getattr(more_messages_pb2, 'class')()
+    # Top level extension
+    extension1 = getattr(more_messages_pb2, 'continue')
+    message.Extensions[extension1] = 456
+    self.assertEqual(message.Extensions[extension1], 456)
+    # None top level extension
+    extension2 = getattr(more_messages_pb2.ExtendClass, 'return')
+    message.Extensions[extension2] = 789
+    self.assertEqual(message.Extensions[extension2], 789)
+
+  def testExtensionForNestedMessage(self):
+    message = getattr(more_messages_pb2, 'class')()
+    extension = getattr(more_messages_pb2, 'with')
+    message.nested_message.Extensions[extension] = 999
+    self.assertEqual(message.nested_message.Extensions[extension], 999)
+
+  def TestFullKeywordUsed(self):
+    message = more_messages_pb2.TestFullKeyword()
+    message.field2.int_field = 123
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_factory_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_factory_test.py
new file mode 100644
index 0000000..24b79ec
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_factory_test.py
@@ -0,0 +1,223 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests for google.protobuf.message_factory."""
+
+__author__ = 'matthewtoia@google.com (Matt Toia)'
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import descriptor_pb2
+from google.protobuf.internal import api_implementation
+from google.protobuf.internal import factory_test1_pb2
+from google.protobuf.internal import factory_test2_pb2
+from google.protobuf.internal import testing_refleaks
+from google.protobuf import descriptor_database
+from google.protobuf import descriptor_pool
+from google.protobuf import message_factory
+
+
+@testing_refleaks.TestCase
+class MessageFactoryTest(unittest.TestCase):
+
+  def setUp(self):
+    self.factory_test1_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        factory_test1_pb2.DESCRIPTOR.serialized_pb)
+    self.factory_test2_fd = descriptor_pb2.FileDescriptorProto.FromString(
+        factory_test2_pb2.DESCRIPTOR.serialized_pb)
+
+  def _ExerciseDynamicClass(self, cls):
+    msg = cls()
+    msg.mandatory = 42
+    msg.nested_factory_2_enum = 0
+    msg.nested_factory_2_message.value = 'nested message value'
+    msg.factory_1_message.factory_1_enum = 1
+    msg.factory_1_message.nested_factory_1_enum = 0
+    msg.factory_1_message.nested_factory_1_message.value = (
+        'nested message value')
+    msg.factory_1_message.scalar_value = 22
+    msg.factory_1_message.list_value.extend([u'one', u'two', u'three'])
+    msg.factory_1_message.list_value.append(u'four')
+    msg.factory_1_enum = 1
+    msg.nested_factory_1_enum = 0
+    msg.nested_factory_1_message.value = 'nested message value'
+    msg.circular_message.mandatory = 1
+    msg.circular_message.circular_message.mandatory = 2
+    msg.circular_message.scalar_value = 'one deep'
+    msg.scalar_value = 'zero deep'
+    msg.list_value.extend([u'four', u'three', u'two'])
+    msg.list_value.append(u'one')
+    msg.grouped.add()
+    msg.grouped[0].part_1 = 'hello'
+    msg.grouped[0].part_2 = 'world'
+    msg.grouped.add(part_1='testing', part_2='123')
+    msg.loop.loop.mandatory = 2
+    msg.loop.loop.loop.loop.mandatory = 4
+    serialized = msg.SerializeToString()
+    converted = factory_test2_pb2.Factory2Message.FromString(serialized)
+    reserialized = converted.SerializeToString()
+    self.assertEqual(serialized, reserialized)
+    result = cls.FromString(reserialized)
+    self.assertEqual(msg, result)
+
+  def testGetPrototype(self):
+    db = descriptor_database.DescriptorDatabase()
+    pool = descriptor_pool.DescriptorPool(db)
+    db.Add(self.factory_test1_fd)
+    db.Add(self.factory_test2_fd)
+    factory = message_factory.MessageFactory()
+    cls = factory.GetPrototype(pool.FindMessageTypeByName(
+        'google.protobuf.python.internal.Factory2Message'))
+    self.assertFalse(cls is factory_test2_pb2.Factory2Message)
+    self._ExerciseDynamicClass(cls)
+    cls2 = factory.GetPrototype(pool.FindMessageTypeByName(
+        'google.protobuf.python.internal.Factory2Message'))
+    self.assertTrue(cls is cls2)
+
+  def testGetMessages(self):
+    # performed twice because multiple calls with the same input must be allowed
+    for _ in range(2):
+      # GetMessage should work regardless of the order the FileDescriptorProto
+      # are provided. In particular, the function should succeed when the files
+      # are not in the topological order of dependencies.
+
+      # Assuming factory_test2_fd depends on factory_test1_fd.
+      self.assertIn(self.factory_test1_fd.name,
+                    self.factory_test2_fd.dependency)
+      # Get messages should work when a file comes before its dependencies:
+      # factory_test2_fd comes before factory_test1_fd.
+      messages = message_factory.GetMessages([self.factory_test2_fd,
+                                              self.factory_test1_fd])
+      self.assertTrue(
+          set(['google.protobuf.python.internal.Factory2Message',
+               'google.protobuf.python.internal.Factory1Message'],
+             ).issubset(set(messages.keys())))
+      self._ExerciseDynamicClass(
+          messages['google.protobuf.python.internal.Factory2Message'])
+      factory_msg1 = messages['google.protobuf.python.internal.Factory1Message']
+      self.assertTrue(set(
+          ['google.protobuf.python.internal.Factory2Message.one_more_field',
+           'google.protobuf.python.internal.another_field'],).issubset(set(
+               ext.full_name
+               for ext in factory_msg1.DESCRIPTOR.file.pool.FindAllExtensions(
+                   factory_msg1.DESCRIPTOR))))
+      msg1 = messages['google.protobuf.python.internal.Factory1Message']()
+      ext1 = msg1.Extensions._FindExtensionByName(
+          'google.protobuf.python.internal.Factory2Message.one_more_field')
+      ext2 = msg1.Extensions._FindExtensionByName(
+          'google.protobuf.python.internal.another_field')
+      self.assertEqual(0, len(msg1.Extensions))
+      msg1.Extensions[ext1] = 'test1'
+      msg1.Extensions[ext2] = 'test2'
+      self.assertEqual('test1', msg1.Extensions[ext1])
+      self.assertEqual('test2', msg1.Extensions[ext2])
+      self.assertEqual(None,
+                       msg1.Extensions._FindExtensionByNumber(12321))
+      self.assertEqual(2, len(msg1.Extensions))
+      if api_implementation.Type() == 'cpp':
+        self.assertRaises(TypeError,
+                          msg1.Extensions._FindExtensionByName, 0)
+        self.assertRaises(TypeError,
+                          msg1.Extensions._FindExtensionByNumber, '')
+      else:
+        self.assertEqual(None,
+                         msg1.Extensions._FindExtensionByName(0))
+        self.assertEqual(None,
+                         msg1.Extensions._FindExtensionByNumber(''))
+
+  def testDuplicateExtensionNumber(self):
+    pool = descriptor_pool.DescriptorPool()
+    factory = message_factory.MessageFactory(pool=pool)
+
+    # Add Container message.
+    f = descriptor_pb2.FileDescriptorProto()
+    f.name = 'google/protobuf/internal/container.proto'
+    f.package = 'google.protobuf.python.internal'
+    msg = f.message_type.add()
+    msg.name = 'Container'
+    rng = msg.extension_range.add()
+    rng.start = 1
+    rng.end = 10
+    pool.Add(f)
+    msgs = factory.GetMessages([f.name])
+    self.assertIn('google.protobuf.python.internal.Container', msgs)
+
+    # Extend container.
+    f = descriptor_pb2.FileDescriptorProto()
+    f.name = 'google/protobuf/internal/extension.proto'
+    f.package = 'google.protobuf.python.internal'
+    f.dependency.append('google/protobuf/internal/container.proto')
+    msg = f.message_type.add()
+    msg.name = 'Extension'
+    ext = msg.extension.add()
+    ext.name = 'extension_field'
+    ext.number = 2
+    ext.label = descriptor_pb2.FieldDescriptorProto.LABEL_OPTIONAL
+    ext.type_name = 'Extension'
+    ext.extendee = 'Container'
+    pool.Add(f)
+    msgs = factory.GetMessages([f.name])
+    self.assertIn('google.protobuf.python.internal.Extension', msgs)
+
+    # Add Duplicate extending the same field number.
+    f = descriptor_pb2.FileDescriptorProto()
+    f.name = 'google/protobuf/internal/duplicate.proto'
+    f.package = 'google.protobuf.python.internal'
+    f.dependency.append('google/protobuf/internal/container.proto')
+    msg = f.message_type.add()
+    msg.name = 'Duplicate'
+    ext = msg.extension.add()
+    ext.name = 'extension_field'
+    ext.number = 2
+    ext.label = descriptor_pb2.FieldDescriptorProto.LABEL_OPTIONAL
+    ext.type_name = 'Duplicate'
+    ext.extendee = 'Container'
+    pool.Add(f)
+
+    with self.assertRaises(Exception) as cm:
+      factory.GetMessages([f.name])
+
+    self.assertIn(str(cm.exception),
+                  ['Extensions '
+                   '"google.protobuf.python.internal.Duplicate.extension_field" and'
+                   ' "google.protobuf.python.internal.Extension.extension_field"'
+                   ' both try to extend message type'
+                   ' "google.protobuf.python.internal.Container"'
+                   ' with field number 2.',
+                   'Double registration of Extensions'])
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_listener.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_listener.py
new file mode 100644
index 0000000..0fc255a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_listener.py
@@ -0,0 +1,78 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Defines a listener interface for observing certain
+state transitions on Message objects.
+
+Also defines a null implementation of this interface.
+"""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+
+class MessageListener(object):
+
+  """Listens for modifications made to a message.  Meant to be registered via
+  Message._SetListener().
+
+  Attributes:
+    dirty:  If True, then calling Modified() would be a no-op.  This can be
+            used to avoid these calls entirely in the common case.
+  """
+
+  def Modified(self):
+    """Called every time the message is modified in such a way that the parent
+    message may need to be updated.  This currently means either:
+    (a) The message was modified for the first time, so the parent message
+        should henceforth mark the message as present.
+    (b) The message's cached byte size became dirty -- i.e. the message was
+        modified for the first time after a previous call to ByteSize().
+        Therefore the parent should also mark its byte size as dirty.
+    Note that (a) implies (b), since new objects start out with a client cached
+    size (zero).  However, we document (a) explicitly because it is important.
+
+    Modified() will *only* be called in response to one of these two events --
+    not every time the sub-message is modified.
+
+    Note that if the listener's |dirty| attribute is true, then calling
+    Modified at the moment would be a no-op, so it can be skipped.  Performance-
+    sensitive callers should check this attribute directly before calling since
+    it will be true most of the time.
+    """
+
+    raise NotImplementedError
+
+
+class NullMessageListener(object):
+
+  """No-op MessageListener implementation."""
+
+  def Modified(self):
+    pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_set_extensions_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_set_extensions_pb2.py
new file mode 100644
index 0000000..b24e006
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_set_extensions_pb2.py
@@ -0,0 +1,213 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/message_set_extensions.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/message_set_extensions.proto',
+  package='google.protobuf.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n5google/protobuf/internal/message_set_extensions.proto\x12\x18google.protobuf.internal\"\x1e\n\x0eTestMessageSet*\x08\x08\x04\x10\xff\xff\xff\xff\x07:\x02\x08\x01\"\xa5\x01\n\x18TestMessageSetExtension1\x12\t\n\x01i\x18\x0f \x01(\x05\x32~\n\x15message_set_extension\x12(.google.protobuf.internal.TestMessageSet\x18\xab\xff\xf6. \x01(\x0b\x32\x32.google.protobuf.internal.TestMessageSetExtension1\"\xa7\x01\n\x18TestMessageSetExtension2\x12\x0b\n\x03str\x18\x19 \x01(\t2~\n\x15message_set_extension\x12(.google.protobuf.internal.TestMessageSet\x18\xca\xff\xf6. \x01(\x0b\x32\x32.google.protobuf.internal.TestMessageSetExtension2\"(\n\x18TestMessageSetExtension3\x12\x0c\n\x04text\x18# \x01(\t:\x7f\n\x16message_set_extension3\x12(.google.protobuf.internal.TestMessageSet\x18\xdf\xff\xf6. \x01(\x0b\x32\x32.google.protobuf.internal.TestMessageSetExtension3'
+)
+
+
+MESSAGE_SET_EXTENSION3_FIELD_NUMBER = 98418655
+message_set_extension3 = _descriptor.FieldDescriptor(
+  name='message_set_extension3', full_name='google.protobuf.internal.message_set_extension3', index=0,
+  number=98418655, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+
+_TESTMESSAGESET = _descriptor.Descriptor(
+  name='TestMessageSet',
+  full_name='google.protobuf.internal.TestMessageSet',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\010\001',
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(4, 2147483647), ],
+  oneofs=[
+  ],
+  serialized_start=83,
+  serialized_end=113,
+)
+
+
+_TESTMESSAGESETEXTENSION1 = _descriptor.Descriptor(
+  name='TestMessageSetExtension1',
+  full_name='google.protobuf.internal.TestMessageSetExtension1',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='i', full_name='google.protobuf.internal.TestMessageSetExtension1.i', index=0,
+      number=15, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='message_set_extension', full_name='google.protobuf.internal.TestMessageSetExtension1.message_set_extension', index=0,
+      number=98418603, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=116,
+  serialized_end=281,
+)
+
+
+_TESTMESSAGESETEXTENSION2 = _descriptor.Descriptor(
+  name='TestMessageSetExtension2',
+  full_name='google.protobuf.internal.TestMessageSetExtension2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='str', full_name='google.protobuf.internal.TestMessageSetExtension2.str', index=0,
+      number=25, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='message_set_extension', full_name='google.protobuf.internal.TestMessageSetExtension2.message_set_extension', index=0,
+      number=98418634, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=284,
+  serialized_end=451,
+)
+
+
+_TESTMESSAGESETEXTENSION3 = _descriptor.Descriptor(
+  name='TestMessageSetExtension3',
+  full_name='google.protobuf.internal.TestMessageSetExtension3',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='text', full_name='google.protobuf.internal.TestMessageSetExtension3.text', index=0,
+      number=35, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=453,
+  serialized_end=493,
+)
+
+DESCRIPTOR.message_types_by_name['TestMessageSet'] = _TESTMESSAGESET
+DESCRIPTOR.message_types_by_name['TestMessageSetExtension1'] = _TESTMESSAGESETEXTENSION1
+DESCRIPTOR.message_types_by_name['TestMessageSetExtension2'] = _TESTMESSAGESETEXTENSION2
+DESCRIPTOR.message_types_by_name['TestMessageSetExtension3'] = _TESTMESSAGESETEXTENSION3
+DESCRIPTOR.extensions_by_name['message_set_extension3'] = message_set_extension3
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestMessageSet = _reflection.GeneratedProtocolMessageType('TestMessageSet', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGESET,
+  '__module__' : 'google.protobuf.internal.message_set_extensions_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.TestMessageSet)
+  })
+_sym_db.RegisterMessage(TestMessageSet)
+
+TestMessageSetExtension1 = _reflection.GeneratedProtocolMessageType('TestMessageSetExtension1', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGESETEXTENSION1,
+  '__module__' : 'google.protobuf.internal.message_set_extensions_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.TestMessageSetExtension1)
+  })
+_sym_db.RegisterMessage(TestMessageSetExtension1)
+
+TestMessageSetExtension2 = _reflection.GeneratedProtocolMessageType('TestMessageSetExtension2', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGESETEXTENSION2,
+  '__module__' : 'google.protobuf.internal.message_set_extensions_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.TestMessageSetExtension2)
+  })
+_sym_db.RegisterMessage(TestMessageSetExtension2)
+
+TestMessageSetExtension3 = _reflection.GeneratedProtocolMessageType('TestMessageSetExtension3', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGESETEXTENSION3,
+  '__module__' : 'google.protobuf.internal.message_set_extensions_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.TestMessageSetExtension3)
+  })
+_sym_db.RegisterMessage(TestMessageSetExtension3)
+
+message_set_extension3.message_type = _TESTMESSAGESETEXTENSION3
+TestMessageSet.RegisterExtension(message_set_extension3)
+_TESTMESSAGESETEXTENSION1.extensions_by_name['message_set_extension'].message_type = _TESTMESSAGESETEXTENSION1
+TestMessageSet.RegisterExtension(_TESTMESSAGESETEXTENSION1.extensions_by_name['message_set_extension'])
+_TESTMESSAGESETEXTENSION2.extensions_by_name['message_set_extension'].message_type = _TESTMESSAGESETEXTENSION2
+TestMessageSet.RegisterExtension(_TESTMESSAGESETEXTENSION2.extensions_by_name['message_set_extension'])
+
+_TESTMESSAGESET._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_test.py
new file mode 100644
index 0000000..e5c3c76
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/message_test.py
@@ -0,0 +1,2704 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests python protocol buffers against the golden message.
+
+Note that the golden messages exercise every known field type, thus this
+test ends up exercising and verifying nearly all of the parsing and
+serialization code in the whole library.
+
+TODO(kenton):  Merge with wire_format_test?  It doesn't make a whole lot of
+sense to call this a test of the "message" module, which only declares an
+abstract interface.
+"""
+
+__author__ = 'gps@google.com (Gregory P. Smith)'
+
+
+import copy
+import math
+import operator
+import pickle
+import pydoc
+import six
+import sys
+import warnings
+
+try:
+  # Since python 3
+  import collections.abc as collections_abc
+except ImportError:
+  # Won't work after python 3.8
+  import collections as collections_abc
+
+try:
+  import unittest2 as unittest  # PY26
+except ImportError:
+  import unittest
+try:
+  cmp                                   # Python 2
+except NameError:
+  cmp = lambda x, y: (x > y) - (x < y)  # Python 3
+
+from google.protobuf import map_proto2_unittest_pb2
+from google.protobuf import map_unittest_pb2
+from google.protobuf import unittest_pb2
+from google.protobuf import unittest_proto3_arena_pb2
+from google.protobuf import descriptor_pb2
+from google.protobuf import descriptor_pool
+from google.protobuf import message_factory
+from google.protobuf import text_format
+from google.protobuf.internal import api_implementation
+from google.protobuf.internal import encoder
+from google.protobuf.internal import more_extensions_pb2
+from google.protobuf.internal import packed_field_test_pb2
+from google.protobuf.internal import test_util
+from google.protobuf.internal import test_proto3_optional_pb2
+from google.protobuf.internal import testing_refleaks
+from google.protobuf import message
+from google.protobuf.internal import _parameterized
+
+UCS2_MAXUNICODE = 65535
+if six.PY3:
+  long = int
+
+
+# Python pre-2.6 does not have isinf() or isnan() functions, so we have
+# to provide our own.
+def isnan(val):
+  # NaN is never equal to itself.
+  return val != val
+def isinf(val):
+  # Infinity times zero equals NaN.
+  return not isnan(val) and isnan(val * 0)
+def IsPosInf(val):
+  return isinf(val) and (val > 0)
+def IsNegInf(val):
+  return isinf(val) and (val < 0)
+
+
+warnings.simplefilter('error', DeprecationWarning)
+
+
+@_parameterized.named_parameters(
+    ('_proto2', unittest_pb2),
+    ('_proto3', unittest_proto3_arena_pb2))
+@testing_refleaks.TestCase
+class MessageTest(unittest.TestCase):
+
+  def testBadUtf8String(self, message_module):
+    if api_implementation.Type() != 'python':
+      self.skipTest("Skipping testBadUtf8String, currently only the python "
+                    "api implementation raises UnicodeDecodeError when a "
+                    "string field contains bad utf-8.")
+    bad_utf8_data = test_util.GoldenFileData('bad_utf8_string')
+    with self.assertRaises(UnicodeDecodeError) as context:
+      message_module.TestAllTypes.FromString(bad_utf8_data)
+    self.assertIn('TestAllTypes.optional_string', str(context.exception))
+
+  def testGoldenMessage(self, message_module):
+    # Proto3 doesn't have the "default_foo" members or foreign enums,
+    # and doesn't preserve unknown fields, so for proto3 we use a golden
+    # message that doesn't have these fields set.
+    if message_module is unittest_pb2:
+      golden_data = test_util.GoldenFileData(
+          'golden_message_oneof_implemented')
+    else:
+      golden_data = test_util.GoldenFileData('golden_message_proto3')
+
+    golden_message = message_module.TestAllTypes()
+    golden_message.ParseFromString(golden_data)
+    if message_module is unittest_pb2:
+      test_util.ExpectAllFieldsSet(self, golden_message)
+    self.assertEqual(golden_data, golden_message.SerializeToString())
+    golden_copy = copy.deepcopy(golden_message)
+    self.assertEqual(golden_data, golden_copy.SerializeToString())
+
+  def testGoldenPackedMessage(self, message_module):
+    golden_data = test_util.GoldenFileData('golden_packed_fields_message')
+    golden_message = message_module.TestPackedTypes()
+    parsed_bytes = golden_message.ParseFromString(golden_data)
+    all_set = message_module.TestPackedTypes()
+    test_util.SetAllPackedFields(all_set)
+    self.assertEqual(parsed_bytes, len(golden_data))
+    self.assertEqual(all_set, golden_message)
+    self.assertEqual(golden_data, all_set.SerializeToString())
+    golden_copy = copy.deepcopy(golden_message)
+    self.assertEqual(golden_data, golden_copy.SerializeToString())
+
+  def testParseErrors(self, message_module):
+    msg = message_module.TestAllTypes()
+    self.assertRaises(TypeError, msg.FromString, 0)
+    self.assertRaises(Exception, msg.FromString, '0')
+    # TODO(jieluo): Fix cpp extension to raise error instead of warning.
+    # b/27494216
+    end_tag = encoder.TagBytes(1, 4)
+    if api_implementation.Type() == 'python':
+      with self.assertRaises(message.DecodeError) as context:
+        msg.FromString(end_tag)
+      self.assertEqual('Unexpected end-group tag.', str(context.exception))
+
+    # Field number 0 is illegal.
+    self.assertRaises(message.DecodeError, msg.FromString, b'\3\4')
+
+  def testDeterminismParameters(self, message_module):
+    # This message is always deterministically serialized, even if determinism
+    # is disabled, so we can use it to verify that all the determinism
+    # parameters work correctly.
+    golden_data = (b'\xe2\x02\nOne string'
+                   b'\xe2\x02\nTwo string'
+                   b'\xe2\x02\nRed string'
+                   b'\xe2\x02\x0bBlue string')
+    golden_message = message_module.TestAllTypes()
+    golden_message.repeated_string.extend([
+        'One string',
+        'Two string',
+        'Red string',
+        'Blue string',
+    ])
+    self.assertEqual(golden_data,
+                     golden_message.SerializeToString(deterministic=None))
+    self.assertEqual(golden_data,
+                     golden_message.SerializeToString(deterministic=False))
+    self.assertEqual(golden_data,
+                     golden_message.SerializeToString(deterministic=True))
+
+    class BadArgError(Exception):
+      pass
+
+    class BadArg(object):
+
+      def __nonzero__(self):
+        raise BadArgError()
+
+      def __bool__(self):
+        raise BadArgError()
+
+    with self.assertRaises(BadArgError):
+      golden_message.SerializeToString(deterministic=BadArg())
+
+  def testPickleSupport(self, message_module):
+    golden_data = test_util.GoldenFileData('golden_message')
+    golden_message = message_module.TestAllTypes()
+    golden_message.ParseFromString(golden_data)
+    pickled_message = pickle.dumps(golden_message)
+
+    unpickled_message = pickle.loads(pickled_message)
+    self.assertEqual(unpickled_message, golden_message)
+
+  def testPickleNestedMessage(self, message_module):
+    golden_message = message_module.TestPickleNestedMessage.NestedMessage(bb=1)
+    pickled_message = pickle.dumps(golden_message)
+    unpickled_message = pickle.loads(pickled_message)
+    self.assertEqual(unpickled_message, golden_message)
+
+  def testPickleNestedNestedMessage(self, message_module):
+    cls = message_module.TestPickleNestedMessage.NestedMessage
+    golden_message = cls.NestedNestedMessage(cc=1)
+    pickled_message = pickle.dumps(golden_message)
+    unpickled_message = pickle.loads(pickled_message)
+    self.assertEqual(unpickled_message, golden_message)
+
+  def testPositiveInfinity(self, message_module):
+    if message_module is unittest_pb2:
+      golden_data = (b'\x5D\x00\x00\x80\x7F'
+                     b'\x61\x00\x00\x00\x00\x00\x00\xF0\x7F'
+                     b'\xCD\x02\x00\x00\x80\x7F'
+                     b'\xD1\x02\x00\x00\x00\x00\x00\x00\xF0\x7F')
+    else:
+      golden_data = (b'\x5D\x00\x00\x80\x7F'
+                     b'\x61\x00\x00\x00\x00\x00\x00\xF0\x7F'
+                     b'\xCA\x02\x04\x00\x00\x80\x7F'
+                     b'\xD2\x02\x08\x00\x00\x00\x00\x00\x00\xF0\x7F')
+
+    golden_message = message_module.TestAllTypes()
+    golden_message.ParseFromString(golden_data)
+    self.assertTrue(IsPosInf(golden_message.optional_float))
+    self.assertTrue(IsPosInf(golden_message.optional_double))
+    self.assertTrue(IsPosInf(golden_message.repeated_float[0]))
+    self.assertTrue(IsPosInf(golden_message.repeated_double[0]))
+    self.assertEqual(golden_data, golden_message.SerializeToString())
+
+  def testNegativeInfinity(self, message_module):
+    if message_module is unittest_pb2:
+      golden_data = (b'\x5D\x00\x00\x80\xFF'
+                     b'\x61\x00\x00\x00\x00\x00\x00\xF0\xFF'
+                     b'\xCD\x02\x00\x00\x80\xFF'
+                     b'\xD1\x02\x00\x00\x00\x00\x00\x00\xF0\xFF')
+    else:
+      golden_data = (b'\x5D\x00\x00\x80\xFF'
+                     b'\x61\x00\x00\x00\x00\x00\x00\xF0\xFF'
+                     b'\xCA\x02\x04\x00\x00\x80\xFF'
+                     b'\xD2\x02\x08\x00\x00\x00\x00\x00\x00\xF0\xFF')
+
+    golden_message = message_module.TestAllTypes()
+    golden_message.ParseFromString(golden_data)
+    self.assertTrue(IsNegInf(golden_message.optional_float))
+    self.assertTrue(IsNegInf(golden_message.optional_double))
+    self.assertTrue(IsNegInf(golden_message.repeated_float[0]))
+    self.assertTrue(IsNegInf(golden_message.repeated_double[0]))
+    self.assertEqual(golden_data, golden_message.SerializeToString())
+
+  def testNotANumber(self, message_module):
+    golden_data = (b'\x5D\x00\x00\xC0\x7F'
+                   b'\x61\x00\x00\x00\x00\x00\x00\xF8\x7F'
+                   b'\xCD\x02\x00\x00\xC0\x7F'
+                   b'\xD1\x02\x00\x00\x00\x00\x00\x00\xF8\x7F')
+    golden_message = message_module.TestAllTypes()
+    golden_message.ParseFromString(golden_data)
+    self.assertTrue(isnan(golden_message.optional_float))
+    self.assertTrue(isnan(golden_message.optional_double))
+    self.assertTrue(isnan(golden_message.repeated_float[0]))
+    self.assertTrue(isnan(golden_message.repeated_double[0]))
+
+    # The protocol buffer may serialize to any one of multiple different
+    # representations of a NaN.  Rather than verify a specific representation,
+    # verify the serialized string can be converted into a correctly
+    # behaving protocol buffer.
+    serialized = golden_message.SerializeToString()
+    message = message_module.TestAllTypes()
+    message.ParseFromString(serialized)
+    self.assertTrue(isnan(message.optional_float))
+    self.assertTrue(isnan(message.optional_double))
+    self.assertTrue(isnan(message.repeated_float[0]))
+    self.assertTrue(isnan(message.repeated_double[0]))
+
+  def testPositiveInfinityPacked(self, message_module):
+    golden_data = (b'\xA2\x06\x04\x00\x00\x80\x7F'
+                   b'\xAA\x06\x08\x00\x00\x00\x00\x00\x00\xF0\x7F')
+    golden_message = message_module.TestPackedTypes()
+    golden_message.ParseFromString(golden_data)
+    self.assertTrue(IsPosInf(golden_message.packed_float[0]))
+    self.assertTrue(IsPosInf(golden_message.packed_double[0]))
+    self.assertEqual(golden_data, golden_message.SerializeToString())
+
+  def testNegativeInfinityPacked(self, message_module):
+    golden_data = (b'\xA2\x06\x04\x00\x00\x80\xFF'
+                   b'\xAA\x06\x08\x00\x00\x00\x00\x00\x00\xF0\xFF')
+    golden_message = message_module.TestPackedTypes()
+    golden_message.ParseFromString(golden_data)
+    self.assertTrue(IsNegInf(golden_message.packed_float[0]))
+    self.assertTrue(IsNegInf(golden_message.packed_double[0]))
+    self.assertEqual(golden_data, golden_message.SerializeToString())
+
+  def testNotANumberPacked(self, message_module):
+    golden_data = (b'\xA2\x06\x04\x00\x00\xC0\x7F'
+                   b'\xAA\x06\x08\x00\x00\x00\x00\x00\x00\xF8\x7F')
+    golden_message = message_module.TestPackedTypes()
+    golden_message.ParseFromString(golden_data)
+    self.assertTrue(isnan(golden_message.packed_float[0]))
+    self.assertTrue(isnan(golden_message.packed_double[0]))
+
+    serialized = golden_message.SerializeToString()
+    message = message_module.TestPackedTypes()
+    message.ParseFromString(serialized)
+    self.assertTrue(isnan(message.packed_float[0]))
+    self.assertTrue(isnan(message.packed_double[0]))
+
+  def testExtremeFloatValues(self, message_module):
+    message = message_module.TestAllTypes()
+
+    # Most positive exponent, no significand bits set.
+    kMostPosExponentNoSigBits = math.pow(2, 127)
+    message.optional_float = kMostPosExponentNoSigBits
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_float == kMostPosExponentNoSigBits)
+
+    # Most positive exponent, one significand bit set.
+    kMostPosExponentOneSigBit = 1.5 * math.pow(2, 127)
+    message.optional_float = kMostPosExponentOneSigBit
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_float == kMostPosExponentOneSigBit)
+
+    # Repeat last two cases with values of same magnitude, but negative.
+    message.optional_float = -kMostPosExponentNoSigBits
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_float == -kMostPosExponentNoSigBits)
+
+    message.optional_float = -kMostPosExponentOneSigBit
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_float == -kMostPosExponentOneSigBit)
+
+    # Most negative exponent, no significand bits set.
+    kMostNegExponentNoSigBits = math.pow(2, -127)
+    message.optional_float = kMostNegExponentNoSigBits
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_float == kMostNegExponentNoSigBits)
+
+    # Most negative exponent, one significand bit set.
+    kMostNegExponentOneSigBit = 1.5 * math.pow(2, -127)
+    message.optional_float = kMostNegExponentOneSigBit
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_float == kMostNegExponentOneSigBit)
+
+    # Repeat last two cases with values of the same magnitude, but negative.
+    message.optional_float = -kMostNegExponentNoSigBits
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_float == -kMostNegExponentNoSigBits)
+
+    message.optional_float = -kMostNegExponentOneSigBit
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_float == -kMostNegExponentOneSigBit)
+
+    # Max 4 bytes float value
+    max_float = float.fromhex('0x1.fffffep+127')
+    message.optional_float = max_float
+    self.assertAlmostEqual(message.optional_float, max_float)
+    serialized_data = message.SerializeToString()
+    message.ParseFromString(serialized_data)
+    self.assertAlmostEqual(message.optional_float, max_float)
+
+    # Test set double to float field.
+    message.optional_float = 3.4028235e+39
+    self.assertEqual(message.optional_float, float('inf'))
+    serialized_data = message.SerializeToString()
+    message.ParseFromString(serialized_data)
+    self.assertEqual(message.optional_float, float('inf'))
+
+    message.optional_float = -3.4028235e+39
+    self.assertEqual(message.optional_float, float('-inf'))
+
+    message.optional_float = 1.4028235e-39
+    self.assertAlmostEqual(message.optional_float, 1.4028235e-39)
+
+  def testExtremeDoubleValues(self, message_module):
+    message = message_module.TestAllTypes()
+
+    # Most positive exponent, no significand bits set.
+    kMostPosExponentNoSigBits = math.pow(2, 1023)
+    message.optional_double = kMostPosExponentNoSigBits
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_double == kMostPosExponentNoSigBits)
+
+    # Most positive exponent, one significand bit set.
+    kMostPosExponentOneSigBit = 1.5 * math.pow(2, 1023)
+    message.optional_double = kMostPosExponentOneSigBit
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_double == kMostPosExponentOneSigBit)
+
+    # Repeat last two cases with values of same magnitude, but negative.
+    message.optional_double = -kMostPosExponentNoSigBits
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_double == -kMostPosExponentNoSigBits)
+
+    message.optional_double = -kMostPosExponentOneSigBit
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_double == -kMostPosExponentOneSigBit)
+
+    # Most negative exponent, no significand bits set.
+    kMostNegExponentNoSigBits = math.pow(2, -1023)
+    message.optional_double = kMostNegExponentNoSigBits
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_double == kMostNegExponentNoSigBits)
+
+    # Most negative exponent, one significand bit set.
+    kMostNegExponentOneSigBit = 1.5 * math.pow(2, -1023)
+    message.optional_double = kMostNegExponentOneSigBit
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_double == kMostNegExponentOneSigBit)
+
+    # Repeat last two cases with values of the same magnitude, but negative.
+    message.optional_double = -kMostNegExponentNoSigBits
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_double == -kMostNegExponentNoSigBits)
+
+    message.optional_double = -kMostNegExponentOneSigBit
+    message.ParseFromString(message.SerializeToString())
+    self.assertTrue(message.optional_double == -kMostNegExponentOneSigBit)
+
+  def testFloatPrinting(self, message_module):
+    message = message_module.TestAllTypes()
+    message.optional_float = 2.0
+    self.assertEqual(str(message), 'optional_float: 2.0\n')
+
+  def testHighPrecisionFloatPrinting(self, message_module):
+    msg = message_module.TestAllTypes()
+    msg.optional_float = 0.12345678912345678
+    old_float = msg.optional_float
+    msg.ParseFromString(msg.SerializeToString())
+    self.assertEqual(old_float, msg.optional_float)
+
+  def testHighPrecisionDoublePrinting(self, message_module):
+    msg = message_module.TestAllTypes()
+    msg.optional_double = 0.12345678912345678
+    if sys.version_info >= (3,):
+      self.assertEqual(str(msg), 'optional_double: 0.12345678912345678\n')
+    else:
+      self.assertEqual(str(msg), 'optional_double: 0.123456789123\n')
+
+  def testUnknownFieldPrinting(self, message_module):
+    populated = message_module.TestAllTypes()
+    test_util.SetAllNonLazyFields(populated)
+    empty = message_module.TestEmptyMessage()
+    empty.ParseFromString(populated.SerializeToString())
+    self.assertEqual(str(empty), '')
+
+  def testAppendRepeatedCompositeField(self, message_module):
+    msg = message_module.TestAllTypes()
+    msg.repeated_nested_message.append(
+        message_module.TestAllTypes.NestedMessage(bb=1))
+    nested = message_module.TestAllTypes.NestedMessage(bb=2)
+    msg.repeated_nested_message.append(nested)
+    try:
+      msg.repeated_nested_message.append(1)
+    except TypeError:
+      pass
+    self.assertEqual(2, len(msg.repeated_nested_message))
+    self.assertEqual([1, 2],
+                     [m.bb for m in msg.repeated_nested_message])
+
+  def testInsertRepeatedCompositeField(self, message_module):
+    msg = message_module.TestAllTypes()
+    msg.repeated_nested_message.insert(
+        -1, message_module.TestAllTypes.NestedMessage(bb=1))
+    sub_msg = msg.repeated_nested_message[0]
+    msg.repeated_nested_message.insert(
+        0, message_module.TestAllTypes.NestedMessage(bb=2))
+    msg.repeated_nested_message.insert(
+        99, message_module.TestAllTypes.NestedMessage(bb=3))
+    msg.repeated_nested_message.insert(
+        -2, message_module.TestAllTypes.NestedMessage(bb=-1))
+    msg.repeated_nested_message.insert(
+        -1000, message_module.TestAllTypes.NestedMessage(bb=-1000))
+    try:
+      msg.repeated_nested_message.insert(1, 999)
+    except TypeError:
+      pass
+    self.assertEqual(5, len(msg.repeated_nested_message))
+    self.assertEqual([-1000, 2, -1, 1, 3],
+                     [m.bb for m in msg.repeated_nested_message])
+    self.assertEqual(str(msg),
+                     'repeated_nested_message {\n'
+                     '  bb: -1000\n'
+                     '}\n'
+                     'repeated_nested_message {\n'
+                     '  bb: 2\n'
+                     '}\n'
+                     'repeated_nested_message {\n'
+                     '  bb: -1\n'
+                     '}\n'
+                     'repeated_nested_message {\n'
+                     '  bb: 1\n'
+                     '}\n'
+                     'repeated_nested_message {\n'
+                     '  bb: 3\n'
+                     '}\n')
+    self.assertEqual(sub_msg.bb, 1)
+
+  def testMergeFromRepeatedField(self, message_module):
+    msg = message_module.TestAllTypes()
+    msg.repeated_int32.append(1)
+    msg.repeated_int32.append(3)
+    msg.repeated_nested_message.add(bb=1)
+    msg.repeated_nested_message.add(bb=2)
+    other_msg = message_module.TestAllTypes()
+    other_msg.repeated_nested_message.add(bb=3)
+    other_msg.repeated_nested_message.add(bb=4)
+    other_msg.repeated_int32.append(5)
+    other_msg.repeated_int32.append(7)
+
+    msg.repeated_int32.MergeFrom(other_msg.repeated_int32)
+    self.assertEqual(4, len(msg.repeated_int32))
+
+    msg.repeated_nested_message.MergeFrom(other_msg.repeated_nested_message)
+    self.assertEqual([1, 2, 3, 4],
+                     [m.bb for m in msg.repeated_nested_message])
+
+  def testAddWrongRepeatedNestedField(self, message_module):
+    msg = message_module.TestAllTypes()
+    try:
+      msg.repeated_nested_message.add('wrong')
+    except TypeError:
+      pass
+    try:
+      msg.repeated_nested_message.add(value_field='wrong')
+    except ValueError:
+      pass
+    self.assertEqual(len(msg.repeated_nested_message), 0)
+
+  def testRepeatedContains(self, message_module):
+    msg = message_module.TestAllTypes()
+    msg.repeated_int32.extend([1, 2, 3])
+    self.assertIn(2, msg.repeated_int32)
+    self.assertNotIn(0, msg.repeated_int32)
+
+    msg.repeated_nested_message.add(bb=1)
+    sub_msg1 = msg.repeated_nested_message[0]
+    sub_msg2 = message_module.TestAllTypes.NestedMessage(bb=2)
+    sub_msg3 = message_module.TestAllTypes.NestedMessage(bb=3)
+    msg.repeated_nested_message.append(sub_msg2)
+    msg.repeated_nested_message.insert(0, sub_msg3)
+    self.assertIn(sub_msg1, msg.repeated_nested_message)
+    self.assertIn(sub_msg2, msg.repeated_nested_message)
+    self.assertIn(sub_msg3, msg.repeated_nested_message)
+
+  def testRepeatedScalarIterable(self, message_module):
+    msg = message_module.TestAllTypes()
+    msg.repeated_int32.extend([1, 2, 3])
+    add = 0
+    for item in msg.repeated_int32:
+      add += item
+    self.assertEqual(add, 6)
+
+  def testRepeatedNestedFieldIteration(self, message_module):
+    msg = message_module.TestAllTypes()
+    msg.repeated_nested_message.add(bb=1)
+    msg.repeated_nested_message.add(bb=2)
+    msg.repeated_nested_message.add(bb=3)
+    msg.repeated_nested_message.add(bb=4)
+
+    self.assertEqual([1, 2, 3, 4],
+                     [m.bb for m in msg.repeated_nested_message])
+    self.assertEqual([4, 3, 2, 1],
+                     [m.bb for m in reversed(msg.repeated_nested_message)])
+    self.assertEqual([4, 3, 2, 1],
+                     [m.bb for m in msg.repeated_nested_message[::-1]])
+
+  def testSortingRepeatedScalarFieldsDefaultComparator(self, message_module):
+    """Check some different types with the default comparator."""
+    message = message_module.TestAllTypes()
+
+    # TODO(mattp): would testing more scalar types strengthen test?
+    message.repeated_int32.append(1)
+    message.repeated_int32.append(3)
+    message.repeated_int32.append(2)
+    message.repeated_int32.sort()
+    self.assertEqual(message.repeated_int32[0], 1)
+    self.assertEqual(message.repeated_int32[1], 2)
+    self.assertEqual(message.repeated_int32[2], 3)
+    self.assertEqual(str(message.repeated_int32), str([1, 2, 3]))
+
+    message.repeated_float.append(1.1)
+    message.repeated_float.append(1.3)
+    message.repeated_float.append(1.2)
+    message.repeated_float.sort()
+    self.assertAlmostEqual(message.repeated_float[0], 1.1)
+    self.assertAlmostEqual(message.repeated_float[1], 1.2)
+    self.assertAlmostEqual(message.repeated_float[2], 1.3)
+
+    message.repeated_string.append('a')
+    message.repeated_string.append('c')
+    message.repeated_string.append('b')
+    message.repeated_string.sort()
+    self.assertEqual(message.repeated_string[0], 'a')
+    self.assertEqual(message.repeated_string[1], 'b')
+    self.assertEqual(message.repeated_string[2], 'c')
+    self.assertEqual(str(message.repeated_string), str([u'a', u'b', u'c']))
+
+    message.repeated_bytes.append(b'a')
+    message.repeated_bytes.append(b'c')
+    message.repeated_bytes.append(b'b')
+    message.repeated_bytes.sort()
+    self.assertEqual(message.repeated_bytes[0], b'a')
+    self.assertEqual(message.repeated_bytes[1], b'b')
+    self.assertEqual(message.repeated_bytes[2], b'c')
+    self.assertEqual(str(message.repeated_bytes), str([b'a', b'b', b'c']))
+
+  def testSortingRepeatedScalarFieldsCustomComparator(self, message_module):
+    """Check some different types with custom comparator."""
+    message = message_module.TestAllTypes()
+
+    message.repeated_int32.append(-3)
+    message.repeated_int32.append(-2)
+    message.repeated_int32.append(-1)
+    message.repeated_int32.sort(key=abs)
+    self.assertEqual(message.repeated_int32[0], -1)
+    self.assertEqual(message.repeated_int32[1], -2)
+    self.assertEqual(message.repeated_int32[2], -3)
+
+    message.repeated_string.append('aaa')
+    message.repeated_string.append('bb')
+    message.repeated_string.append('c')
+    message.repeated_string.sort(key=len)
+    self.assertEqual(message.repeated_string[0], 'c')
+    self.assertEqual(message.repeated_string[1], 'bb')
+    self.assertEqual(message.repeated_string[2], 'aaa')
+
+  def testSortingRepeatedCompositeFieldsCustomComparator(self, message_module):
+    """Check passing a custom comparator to sort a repeated composite field."""
+    message = message_module.TestAllTypes()
+
+    message.repeated_nested_message.add().bb = 1
+    message.repeated_nested_message.add().bb = 3
+    message.repeated_nested_message.add().bb = 2
+    message.repeated_nested_message.add().bb = 6
+    message.repeated_nested_message.add().bb = 5
+    message.repeated_nested_message.add().bb = 4
+    message.repeated_nested_message.sort(key=operator.attrgetter('bb'))
+    self.assertEqual(message.repeated_nested_message[0].bb, 1)
+    self.assertEqual(message.repeated_nested_message[1].bb, 2)
+    self.assertEqual(message.repeated_nested_message[2].bb, 3)
+    self.assertEqual(message.repeated_nested_message[3].bb, 4)
+    self.assertEqual(message.repeated_nested_message[4].bb, 5)
+    self.assertEqual(message.repeated_nested_message[5].bb, 6)
+    self.assertEqual(str(message.repeated_nested_message),
+                     '[bb: 1\n, bb: 2\n, bb: 3\n, bb: 4\n, bb: 5\n, bb: 6\n]')
+
+  def testSortingRepeatedCompositeFieldsStable(self, message_module):
+    """Check passing a custom comparator to sort a repeated composite field."""
+    message = message_module.TestAllTypes()
+
+    message.repeated_nested_message.add().bb = 21
+    message.repeated_nested_message.add().bb = 20
+    message.repeated_nested_message.add().bb = 13
+    message.repeated_nested_message.add().bb = 33
+    message.repeated_nested_message.add().bb = 11
+    message.repeated_nested_message.add().bb = 24
+    message.repeated_nested_message.add().bb = 10
+    message.repeated_nested_message.sort(key=lambda z: z.bb // 10)
+    self.assertEqual(
+        [13, 11, 10, 21, 20, 24, 33],
+        [n.bb for n in message.repeated_nested_message])
+
+    # Make sure that for the C++ implementation, the underlying fields
+    # are actually reordered.
+    pb = message.SerializeToString()
+    message.Clear()
+    message.MergeFromString(pb)
+    self.assertEqual(
+        [13, 11, 10, 21, 20, 24, 33],
+        [n.bb for n in message.repeated_nested_message])
+
+  def testRepeatedCompositeFieldSortArguments(self, message_module):
+    """Check sorting a repeated composite field using list.sort() arguments."""
+    message = message_module.TestAllTypes()
+
+    get_bb = operator.attrgetter('bb')
+    cmp_bb = lambda a, b: cmp(a.bb, b.bb)
+    message.repeated_nested_message.add().bb = 1
+    message.repeated_nested_message.add().bb = 3
+    message.repeated_nested_message.add().bb = 2
+    message.repeated_nested_message.add().bb = 6
+    message.repeated_nested_message.add().bb = 5
+    message.repeated_nested_message.add().bb = 4
+    message.repeated_nested_message.sort(key=get_bb)
+    self.assertEqual([k.bb for k in message.repeated_nested_message],
+                     [1, 2, 3, 4, 5, 6])
+    message.repeated_nested_message.sort(key=get_bb, reverse=True)
+    self.assertEqual([k.bb for k in message.repeated_nested_message],
+                     [6, 5, 4, 3, 2, 1])
+    if sys.version_info >= (3,): return  # No cmp sorting in PY3.
+    message.repeated_nested_message.sort(sort_function=cmp_bb)
+    self.assertEqual([k.bb for k in message.repeated_nested_message],
+                     [1, 2, 3, 4, 5, 6])
+    message.repeated_nested_message.sort(cmp=cmp_bb, reverse=True)
+    self.assertEqual([k.bb for k in message.repeated_nested_message],
+                     [6, 5, 4, 3, 2, 1])
+
+  def testRepeatedScalarFieldSortArguments(self, message_module):
+    """Check sorting a scalar field using list.sort() arguments."""
+    message = message_module.TestAllTypes()
+
+    message.repeated_int32.append(-3)
+    message.repeated_int32.append(-2)
+    message.repeated_int32.append(-1)
+    message.repeated_int32.sort(key=abs)
+    self.assertEqual(list(message.repeated_int32), [-1, -2, -3])
+    message.repeated_int32.sort(key=abs, reverse=True)
+    self.assertEqual(list(message.repeated_int32), [-3, -2, -1])
+    if sys.version_info < (3,):  # No cmp sorting in PY3.
+      abs_cmp = lambda a, b: cmp(abs(a), abs(b))
+      message.repeated_int32.sort(sort_function=abs_cmp)
+      self.assertEqual(list(message.repeated_int32), [-1, -2, -3])
+      message.repeated_int32.sort(cmp=abs_cmp, reverse=True)
+      self.assertEqual(list(message.repeated_int32), [-3, -2, -1])
+
+    message.repeated_string.append('aaa')
+    message.repeated_string.append('bb')
+    message.repeated_string.append('c')
+    message.repeated_string.sort(key=len)
+    self.assertEqual(list(message.repeated_string), ['c', 'bb', 'aaa'])
+    message.repeated_string.sort(key=len, reverse=True)
+    self.assertEqual(list(message.repeated_string), ['aaa', 'bb', 'c'])
+    if sys.version_info < (3,):  # No cmp sorting in PY3.
+      len_cmp = lambda a, b: cmp(len(a), len(b))
+      message.repeated_string.sort(sort_function=len_cmp)
+      self.assertEqual(list(message.repeated_string), ['c', 'bb', 'aaa'])
+      message.repeated_string.sort(cmp=len_cmp, reverse=True)
+      self.assertEqual(list(message.repeated_string), ['aaa', 'bb', 'c'])
+
+  def testRepeatedFieldsComparable(self, message_module):
+    m1 = message_module.TestAllTypes()
+    m2 = message_module.TestAllTypes()
+    m1.repeated_int32.append(0)
+    m1.repeated_int32.append(1)
+    m1.repeated_int32.append(2)
+    m2.repeated_int32.append(0)
+    m2.repeated_int32.append(1)
+    m2.repeated_int32.append(2)
+    m1.repeated_nested_message.add().bb = 1
+    m1.repeated_nested_message.add().bb = 2
+    m1.repeated_nested_message.add().bb = 3
+    m2.repeated_nested_message.add().bb = 1
+    m2.repeated_nested_message.add().bb = 2
+    m2.repeated_nested_message.add().bb = 3
+
+    if sys.version_info >= (3,): return  # No cmp() in PY3.
+
+    # These comparisons should not raise errors.
+    _ = m1 < m2
+    _ = m1.repeated_nested_message < m2.repeated_nested_message
+
+    # Make sure cmp always works. If it wasn't defined, these would be
+    # id() comparisons and would all fail.
+    self.assertEqual(cmp(m1, m2), 0)
+    self.assertEqual(cmp(m1.repeated_int32, m2.repeated_int32), 0)
+    self.assertEqual(cmp(m1.repeated_int32, [0, 1, 2]), 0)
+    self.assertEqual(cmp(m1.repeated_nested_message,
+                         m2.repeated_nested_message), 0)
+    with self.assertRaises(TypeError):
+      # Can't compare repeated composite containers to lists.
+      cmp(m1.repeated_nested_message, m2.repeated_nested_message[:])
+
+    # TODO(anuraag): Implement extensiondict comparison in C++ and then add test
+
+  def testRepeatedFieldsAreSequences(self, message_module):
+    m = message_module.TestAllTypes()
+    self.assertIsInstance(m.repeated_int32, collections_abc.MutableSequence)
+    self.assertIsInstance(m.repeated_nested_message,
+                          collections_abc.MutableSequence)
+
+  def testRepeatedFieldsNotHashable(self, message_module):
+    m = message_module.TestAllTypes()
+    with self.assertRaises(TypeError):
+      hash(m.repeated_int32)
+    with self.assertRaises(TypeError):
+      hash(m.repeated_nested_message)
+
+  def testRepeatedFieldInsideNestedMessage(self, message_module):
+    m = message_module.NestedTestAllTypes()
+    m.payload.repeated_int32.extend([])
+    self.assertTrue(m.HasField('payload'))
+
+  def testMergeFrom(self, message_module):
+    m1 = message_module.TestAllTypes()
+    m2 = message_module.TestAllTypes()
+    # Cpp extension will lazily create a sub message which is immutable.
+    nested = m1.optional_nested_message
+    self.assertEqual(0, nested.bb)
+    m2.optional_nested_message.bb = 1
+    # Make sure cmessage pointing to a mutable message after merge instead of
+    # the lazily created message.
+    m1.MergeFrom(m2)
+    self.assertEqual(1, nested.bb)
+
+    # Test more nested sub message.
+    msg1 = message_module.NestedTestAllTypes()
+    msg2 = message_module.NestedTestAllTypes()
+    nested = msg1.child.payload.optional_nested_message
+    self.assertEqual(0, nested.bb)
+    msg2.child.payload.optional_nested_message.bb = 1
+    msg1.MergeFrom(msg2)
+    self.assertEqual(1, nested.bb)
+
+    # Test repeated field.
+    self.assertEqual(msg1.payload.repeated_nested_message,
+                     msg1.payload.repeated_nested_message)
+    nested = msg2.payload.repeated_nested_message.add()
+    nested.bb = 1
+    msg1.MergeFrom(msg2)
+    self.assertEqual(1, len(msg1.payload.repeated_nested_message))
+    self.assertEqual(1, nested.bb)
+
+  def testMergeFromString(self, message_module):
+    m1 = message_module.TestAllTypes()
+    m2 = message_module.TestAllTypes()
+    # Cpp extension will lazily create a sub message which is immutable.
+    self.assertEqual(0, m1.optional_nested_message.bb)
+    m2.optional_nested_message.bb = 1
+    # Make sure cmessage pointing to a mutable message after merge instead of
+    # the lazily created message.
+    m1.MergeFromString(m2.SerializeToString())
+    self.assertEqual(1, m1.optional_nested_message.bb)
+
+  @unittest.skipIf(six.PY2, 'memoryview objects are not supported on py2')
+  def testMergeFromStringUsingMemoryViewWorksInPy3(self, message_module):
+    m2 = message_module.TestAllTypes()
+    m2.optional_string = 'scalar string'
+    m2.repeated_string.append('repeated string')
+    m2.optional_bytes = b'scalar bytes'
+    m2.repeated_bytes.append(b'repeated bytes')
+
+    serialized = m2.SerializeToString()
+    memview = memoryview(serialized)
+    m1 = message_module.TestAllTypes.FromString(memview)
+
+    self.assertEqual(m1.optional_bytes, b'scalar bytes')
+    self.assertEqual(m1.repeated_bytes, [b'repeated bytes'])
+    self.assertEqual(m1.optional_string, 'scalar string')
+    self.assertEqual(m1.repeated_string, ['repeated string'])
+    # Make sure that the memoryview was correctly converted to bytes, and
+    # that a sub-sliced memoryview is not being used.
+    self.assertIsInstance(m1.optional_bytes, bytes)
+    self.assertIsInstance(m1.repeated_bytes[0], bytes)
+    self.assertIsInstance(m1.optional_string, six.text_type)
+    self.assertIsInstance(m1.repeated_string[0], six.text_type)
+
+  @unittest.skipIf(six.PY3, 'memoryview is supported by py3')
+  def testMergeFromStringUsingMemoryViewIsPy2Error(self, message_module):
+    memview = memoryview(b'')
+    with self.assertRaises(TypeError):
+      message_module.TestAllTypes.FromString(memview)
+
+  def testMergeFromEmpty(self, message_module):
+    m1 = message_module.TestAllTypes()
+    # Cpp extension will lazily create a sub message which is immutable.
+    self.assertEqual(0, m1.optional_nested_message.bb)
+    self.assertFalse(m1.HasField('optional_nested_message'))
+    # Make sure the sub message is still immutable after merge from empty.
+    m1.MergeFromString(b'')  # field state should not change
+    self.assertFalse(m1.HasField('optional_nested_message'))
+
+  def ensureNestedMessageExists(self, msg, attribute):
+    """Make sure that a nested message object exists.
+
+    As soon as a nested message attribute is accessed, it will be present in the
+    _fields dict, without being marked as actually being set.
+    """
+    getattr(msg, attribute)
+    self.assertFalse(msg.HasField(attribute))
+
+  def testOneofGetCaseNonexistingField(self, message_module):
+    m = message_module.TestAllTypes()
+    self.assertRaises(ValueError, m.WhichOneof, 'no_such_oneof_field')
+    self.assertRaises(Exception, m.WhichOneof, 0)
+
+  def testOneofDefaultValues(self, message_module):
+    m = message_module.TestAllTypes()
+    self.assertIs(None, m.WhichOneof('oneof_field'))
+    self.assertFalse(m.HasField('oneof_field'))
+    self.assertFalse(m.HasField('oneof_uint32'))
+
+    # Oneof is set even when setting it to a default value.
+    m.oneof_uint32 = 0
+    self.assertEqual('oneof_uint32', m.WhichOneof('oneof_field'))
+    self.assertTrue(m.HasField('oneof_field'))
+    self.assertTrue(m.HasField('oneof_uint32'))
+    self.assertFalse(m.HasField('oneof_string'))
+
+    m.oneof_string = ""
+    self.assertEqual('oneof_string', m.WhichOneof('oneof_field'))
+    self.assertTrue(m.HasField('oneof_string'))
+    self.assertFalse(m.HasField('oneof_uint32'))
+
+  def testOneofSemantics(self, message_module):
+    m = message_module.TestAllTypes()
+    self.assertIs(None, m.WhichOneof('oneof_field'))
+
+    m.oneof_uint32 = 11
+    self.assertEqual('oneof_uint32', m.WhichOneof('oneof_field'))
+    self.assertTrue(m.HasField('oneof_uint32'))
+
+    m.oneof_string = u'foo'
+    self.assertEqual('oneof_string', m.WhichOneof('oneof_field'))
+    self.assertFalse(m.HasField('oneof_uint32'))
+    self.assertTrue(m.HasField('oneof_string'))
+
+    # Read nested message accessor without accessing submessage.
+    m.oneof_nested_message
+    self.assertEqual('oneof_string', m.WhichOneof('oneof_field'))
+    self.assertTrue(m.HasField('oneof_string'))
+    self.assertFalse(m.HasField('oneof_nested_message'))
+
+    # Read accessor of nested message without accessing submessage.
+    m.oneof_nested_message.bb
+    self.assertEqual('oneof_string', m.WhichOneof('oneof_field'))
+    self.assertTrue(m.HasField('oneof_string'))
+    self.assertFalse(m.HasField('oneof_nested_message'))
+
+    m.oneof_nested_message.bb = 11
+    self.assertEqual('oneof_nested_message', m.WhichOneof('oneof_field'))
+    self.assertFalse(m.HasField('oneof_string'))
+    self.assertTrue(m.HasField('oneof_nested_message'))
+
+    m.oneof_bytes = b'bb'
+    self.assertEqual('oneof_bytes', m.WhichOneof('oneof_field'))
+    self.assertFalse(m.HasField('oneof_nested_message'))
+    self.assertTrue(m.HasField('oneof_bytes'))
+
+  def testOneofCompositeFieldReadAccess(self, message_module):
+    m = message_module.TestAllTypes()
+    m.oneof_uint32 = 11
+
+    self.ensureNestedMessageExists(m, 'oneof_nested_message')
+    self.assertEqual('oneof_uint32', m.WhichOneof('oneof_field'))
+    self.assertEqual(11, m.oneof_uint32)
+
+  def testOneofWhichOneof(self, message_module):
+    m = message_module.TestAllTypes()
+    self.assertIs(None, m.WhichOneof('oneof_field'))
+    if message_module is unittest_pb2:
+      self.assertFalse(m.HasField('oneof_field'))
+
+    m.oneof_uint32 = 11
+    self.assertEqual('oneof_uint32', m.WhichOneof('oneof_field'))
+    if message_module is unittest_pb2:
+      self.assertTrue(m.HasField('oneof_field'))
+
+    m.oneof_bytes = b'bb'
+    self.assertEqual('oneof_bytes', m.WhichOneof('oneof_field'))
+
+    m.ClearField('oneof_bytes')
+    self.assertIs(None, m.WhichOneof('oneof_field'))
+    if message_module is unittest_pb2:
+      self.assertFalse(m.HasField('oneof_field'))
+
+  def testOneofClearField(self, message_module):
+    m = message_module.TestAllTypes()
+    m.oneof_uint32 = 11
+    m.ClearField('oneof_field')
+    if message_module is unittest_pb2:
+      self.assertFalse(m.HasField('oneof_field'))
+    self.assertFalse(m.HasField('oneof_uint32'))
+    self.assertIs(None, m.WhichOneof('oneof_field'))
+
+  def testOneofClearSetField(self, message_module):
+    m = message_module.TestAllTypes()
+    m.oneof_uint32 = 11
+    m.ClearField('oneof_uint32')
+    if message_module is unittest_pb2:
+      self.assertFalse(m.HasField('oneof_field'))
+    self.assertFalse(m.HasField('oneof_uint32'))
+    self.assertIs(None, m.WhichOneof('oneof_field'))
+
+  def testOneofClearUnsetField(self, message_module):
+    m = message_module.TestAllTypes()
+    m.oneof_uint32 = 11
+    self.ensureNestedMessageExists(m, 'oneof_nested_message')
+    m.ClearField('oneof_nested_message')
+    self.assertEqual(11, m.oneof_uint32)
+    if message_module is unittest_pb2:
+      self.assertTrue(m.HasField('oneof_field'))
+    self.assertTrue(m.HasField('oneof_uint32'))
+    self.assertEqual('oneof_uint32', m.WhichOneof('oneof_field'))
+
+  def testOneofDeserialize(self, message_module):
+    m = message_module.TestAllTypes()
+    m.oneof_uint32 = 11
+    m2 = message_module.TestAllTypes()
+    m2.ParseFromString(m.SerializeToString())
+    self.assertEqual('oneof_uint32', m2.WhichOneof('oneof_field'))
+
+  def testOneofCopyFrom(self, message_module):
+    m = message_module.TestAllTypes()
+    m.oneof_uint32 = 11
+    m2 = message_module.TestAllTypes()
+    m2.CopyFrom(m)
+    self.assertEqual('oneof_uint32', m2.WhichOneof('oneof_field'))
+
+  def testOneofNestedMergeFrom(self, message_module):
+    m = message_module.NestedTestAllTypes()
+    m.payload.oneof_uint32 = 11
+    m2 = message_module.NestedTestAllTypes()
+    m2.payload.oneof_bytes = b'bb'
+    m2.child.payload.oneof_bytes = b'bb'
+    m2.MergeFrom(m)
+    self.assertEqual('oneof_uint32', m2.payload.WhichOneof('oneof_field'))
+    self.assertEqual('oneof_bytes', m2.child.payload.WhichOneof('oneof_field'))
+
+  def testOneofMessageMergeFrom(self, message_module):
+    m = message_module.NestedTestAllTypes()
+    m.payload.oneof_nested_message.bb = 11
+    m.child.payload.oneof_nested_message.bb = 12
+    m2 = message_module.NestedTestAllTypes()
+    m2.payload.oneof_uint32 = 13
+    m2.MergeFrom(m)
+    self.assertEqual('oneof_nested_message',
+                     m2.payload.WhichOneof('oneof_field'))
+    self.assertEqual('oneof_nested_message',
+                     m2.child.payload.WhichOneof('oneof_field'))
+
+  def testOneofNestedMessageInit(self, message_module):
+    m = message_module.TestAllTypes(
+        oneof_nested_message=message_module.TestAllTypes.NestedMessage())
+    self.assertEqual('oneof_nested_message', m.WhichOneof('oneof_field'))
+
+  def testOneofClear(self, message_module):
+    m = message_module.TestAllTypes()
+    m.oneof_uint32 = 11
+    m.Clear()
+    self.assertIsNone(m.WhichOneof('oneof_field'))
+    m.oneof_bytes = b'bb'
+    self.assertEqual('oneof_bytes', m.WhichOneof('oneof_field'))
+
+  def testAssignByteStringToUnicodeField(self, message_module):
+    """Assigning a byte string to a string field should result
+    in the value being converted to a Unicode string."""
+    m = message_module.TestAllTypes()
+    m.optional_string = str('')
+    self.assertIsInstance(m.optional_string, six.text_type)
+
+  def testLongValuedSlice(self, message_module):
+    """It should be possible to use long-valued indicies in slices
+
+    This didn't used to work in the v2 C++ implementation.
+    """
+    m = message_module.TestAllTypes()
+
+    # Repeated scalar
+    m.repeated_int32.append(1)
+    sl = m.repeated_int32[long(0):long(len(m.repeated_int32))]
+    self.assertEqual(len(m.repeated_int32), len(sl))
+
+    # Repeated composite
+    m.repeated_nested_message.add().bb = 3
+    sl = m.repeated_nested_message[long(0):long(len(m.repeated_nested_message))]
+    self.assertEqual(len(m.repeated_nested_message), len(sl))
+
+  def testExtendShouldNotSwallowExceptions(self, message_module):
+    """This didn't use to work in the v2 C++ implementation."""
+    m = message_module.TestAllTypes()
+    with self.assertRaises(NameError) as _:
+      m.repeated_int32.extend(a for i in range(10))  # pylint: disable=undefined-variable
+    with self.assertRaises(NameError) as _:
+      m.repeated_nested_enum.extend(
+          a for i in range(10))  # pylint: disable=undefined-variable
+
+  FALSY_VALUES = [None, False, 0, 0.0, b'', u'', bytearray(), [], {}, set()]
+
+  def testExtendInt32WithNothing(self, message_module):
+    """Test no-ops extending repeated int32 fields."""
+    m = message_module.TestAllTypes()
+    self.assertSequenceEqual([], m.repeated_int32)
+
+    # TODO(ptucker): Deprecate this behavior. b/18413862
+    for falsy_value in MessageTest.FALSY_VALUES:
+      m.repeated_int32.extend(falsy_value)
+      self.assertSequenceEqual([], m.repeated_int32)
+
+    m.repeated_int32.extend([])
+    self.assertSequenceEqual([], m.repeated_int32)
+
+  def testExtendFloatWithNothing(self, message_module):
+    """Test no-ops extending repeated float fields."""
+    m = message_module.TestAllTypes()
+    self.assertSequenceEqual([], m.repeated_float)
+
+    # TODO(ptucker): Deprecate this behavior. b/18413862
+    for falsy_value in MessageTest.FALSY_VALUES:
+      m.repeated_float.extend(falsy_value)
+      self.assertSequenceEqual([], m.repeated_float)
+
+    m.repeated_float.extend([])
+    self.assertSequenceEqual([], m.repeated_float)
+
+  def testExtendStringWithNothing(self, message_module):
+    """Test no-ops extending repeated string fields."""
+    m = message_module.TestAllTypes()
+    self.assertSequenceEqual([], m.repeated_string)
+
+    # TODO(ptucker): Deprecate this behavior. b/18413862
+    for falsy_value in MessageTest.FALSY_VALUES:
+      m.repeated_string.extend(falsy_value)
+      self.assertSequenceEqual([], m.repeated_string)
+
+    m.repeated_string.extend([])
+    self.assertSequenceEqual([], m.repeated_string)
+
+  def testExtendInt32WithPythonList(self, message_module):
+    """Test extending repeated int32 fields with python lists."""
+    m = message_module.TestAllTypes()
+    self.assertSequenceEqual([], m.repeated_int32)
+    m.repeated_int32.extend([0])
+    self.assertSequenceEqual([0], m.repeated_int32)
+    m.repeated_int32.extend([1, 2])
+    self.assertSequenceEqual([0, 1, 2], m.repeated_int32)
+    m.repeated_int32.extend([3, 4])
+    self.assertSequenceEqual([0, 1, 2, 3, 4], m.repeated_int32)
+
+  def testExtendFloatWithPythonList(self, message_module):
+    """Test extending repeated float fields with python lists."""
+    m = message_module.TestAllTypes()
+    self.assertSequenceEqual([], m.repeated_float)
+    m.repeated_float.extend([0.0])
+    self.assertSequenceEqual([0.0], m.repeated_float)
+    m.repeated_float.extend([1.0, 2.0])
+    self.assertSequenceEqual([0.0, 1.0, 2.0], m.repeated_float)
+    m.repeated_float.extend([3.0, 4.0])
+    self.assertSequenceEqual([0.0, 1.0, 2.0, 3.0, 4.0], m.repeated_float)
+
+  def testExtendStringWithPythonList(self, message_module):
+    """Test extending repeated string fields with python lists."""
+    m = message_module.TestAllTypes()
+    self.assertSequenceEqual([], m.repeated_string)
+    m.repeated_string.extend([''])
+    self.assertSequenceEqual([''], m.repeated_string)
+    m.repeated_string.extend(['11', '22'])
+    self.assertSequenceEqual(['', '11', '22'], m.repeated_string)
+    m.repeated_string.extend(['33', '44'])
+    self.assertSequenceEqual(['', '11', '22', '33', '44'], m.repeated_string)
+
+  def testExtendStringWithString(self, message_module):
+    """Test extending repeated string fields with characters from a string."""
+    m = message_module.TestAllTypes()
+    self.assertSequenceEqual([], m.repeated_string)
+    m.repeated_string.extend('abc')
+    self.assertSequenceEqual(['a', 'b', 'c'], m.repeated_string)
+
+  class TestIterable(object):
+    """This iterable object mimics the behavior of numpy.array.
+
+    __nonzero__ fails for length > 1, and returns bool(item[0]) for length == 1.
+
+    """
+
+    def __init__(self, values=None):
+      self._list = values or []
+
+    def __nonzero__(self):
+      size = len(self._list)
+      if size == 0:
+        return False
+      if size == 1:
+        return bool(self._list[0])
+      raise ValueError('Truth value is ambiguous.')
+
+    def __len__(self):
+      return len(self._list)
+
+    def __iter__(self):
+      return self._list.__iter__()
+
+  def testExtendInt32WithIterable(self, message_module):
+    """Test extending repeated int32 fields with iterable."""
+    m = message_module.TestAllTypes()
+    self.assertSequenceEqual([], m.repeated_int32)
+    m.repeated_int32.extend(MessageTest.TestIterable([]))
+    self.assertSequenceEqual([], m.repeated_int32)
+    m.repeated_int32.extend(MessageTest.TestIterable([0]))
+    self.assertSequenceEqual([0], m.repeated_int32)
+    m.repeated_int32.extend(MessageTest.TestIterable([1, 2]))
+    self.assertSequenceEqual([0, 1, 2], m.repeated_int32)
+    m.repeated_int32.extend(MessageTest.TestIterable([3, 4]))
+    self.assertSequenceEqual([0, 1, 2, 3, 4], m.repeated_int32)
+
+  def testExtendFloatWithIterable(self, message_module):
+    """Test extending repeated float fields with iterable."""
+    m = message_module.TestAllTypes()
+    self.assertSequenceEqual([], m.repeated_float)
+    m.repeated_float.extend(MessageTest.TestIterable([]))
+    self.assertSequenceEqual([], m.repeated_float)
+    m.repeated_float.extend(MessageTest.TestIterable([0.0]))
+    self.assertSequenceEqual([0.0], m.repeated_float)
+    m.repeated_float.extend(MessageTest.TestIterable([1.0, 2.0]))
+    self.assertSequenceEqual([0.0, 1.0, 2.0], m.repeated_float)
+    m.repeated_float.extend(MessageTest.TestIterable([3.0, 4.0]))
+    self.assertSequenceEqual([0.0, 1.0, 2.0, 3.0, 4.0], m.repeated_float)
+
+  def testExtendStringWithIterable(self, message_module):
+    """Test extending repeated string fields with iterable."""
+    m = message_module.TestAllTypes()
+    self.assertSequenceEqual([], m.repeated_string)
+    m.repeated_string.extend(MessageTest.TestIterable([]))
+    self.assertSequenceEqual([], m.repeated_string)
+    m.repeated_string.extend(MessageTest.TestIterable(['']))
+    self.assertSequenceEqual([''], m.repeated_string)
+    m.repeated_string.extend(MessageTest.TestIterable(['1', '2']))
+    self.assertSequenceEqual(['', '1', '2'], m.repeated_string)
+    m.repeated_string.extend(MessageTest.TestIterable(['3', '4']))
+    self.assertSequenceEqual(['', '1', '2', '3', '4'], m.repeated_string)
+
+  def testPickleRepeatedScalarContainer(self, message_module):
+    # TODO(tibell): The pure-Python implementation support pickling of
+    #   scalar containers in *some* cases. For now the cpp2 version
+    #   throws an exception to avoid a segfault. Investigate if we
+    #   want to support pickling of these fields.
+    #
+    # For more information see: https://b2.corp.google.com/u/0/issues/18677897
+    if (api_implementation.Type() != 'cpp' or
+        api_implementation.Version() == 2):
+      return
+    m = message_module.TestAllTypes()
+    with self.assertRaises(pickle.PickleError) as _:
+      pickle.dumps(m.repeated_int32, pickle.HIGHEST_PROTOCOL)
+
+  def testSortEmptyRepeatedCompositeContainer(self, message_module):
+    """Exercise a scenario that has led to segfaults in the past.
+    """
+    m = message_module.TestAllTypes()
+    m.repeated_nested_message.sort()
+
+  def testHasFieldOnRepeatedField(self, message_module):
+    """Using HasField on a repeated field should raise an exception.
+    """
+    m = message_module.TestAllTypes()
+    with self.assertRaises(ValueError) as _:
+      m.HasField('repeated_int32')
+
+  def testRepeatedScalarFieldPop(self, message_module):
+    m = message_module.TestAllTypes()
+    with self.assertRaises(IndexError) as _:
+      m.repeated_int32.pop()
+    m.repeated_int32.extend(range(5))
+    self.assertEqual(4, m.repeated_int32.pop())
+    self.assertEqual(0, m.repeated_int32.pop(0))
+    self.assertEqual(2, m.repeated_int32.pop(1))
+    self.assertEqual([1, 3], m.repeated_int32)
+
+  def testRepeatedCompositeFieldPop(self, message_module):
+    m = message_module.TestAllTypes()
+    with self.assertRaises(IndexError) as _:
+      m.repeated_nested_message.pop()
+    with self.assertRaises(TypeError) as _:
+      m.repeated_nested_message.pop('0')
+    for i in range(5):
+      n = m.repeated_nested_message.add()
+      n.bb = i
+    self.assertEqual(4, m.repeated_nested_message.pop().bb)
+    self.assertEqual(0, m.repeated_nested_message.pop(0).bb)
+    self.assertEqual(2, m.repeated_nested_message.pop(1).bb)
+    self.assertEqual([1, 3], [n.bb for n in m.repeated_nested_message])
+
+  def testRepeatedCompareWithSelf(self, message_module):
+    m = message_module.TestAllTypes()
+    for i in range(5):
+      m.repeated_int32.insert(i, i)
+      n = m.repeated_nested_message.add()
+      n.bb = i
+    self.assertSequenceEqual(m.repeated_int32, m.repeated_int32)
+    self.assertEqual(m.repeated_nested_message, m.repeated_nested_message)
+
+  def testReleasedNestedMessages(self, message_module):
+    """A case that lead to a segfault when a message detached from its parent
+    container has itself a child container.
+    """
+    m = message_module.NestedTestAllTypes()
+    m = m.repeated_child.add()
+    m = m.child
+    m = m.repeated_child.add()
+    self.assertEqual(m.payload.optional_int32, 0)
+
+  def testSetRepeatedComposite(self, message_module):
+    m = message_module.TestAllTypes()
+    with self.assertRaises(AttributeError):
+      m.repeated_int32 = []
+    m.repeated_int32.append(1)
+    with self.assertRaises(AttributeError):
+      m.repeated_int32 = []
+
+  def testReturningType(self, message_module):
+    m = message_module.TestAllTypes()
+    self.assertEqual(float, type(m.optional_float))
+    self.assertEqual(float, type(m.optional_double))
+    self.assertEqual(bool, type(m.optional_bool))
+    m.optional_float = 1
+    m.optional_double = 1
+    m.optional_bool = 1
+    m.repeated_float.append(1)
+    m.repeated_double.append(1)
+    m.repeated_bool.append(1)
+    m.ParseFromString(m.SerializeToString())
+    self.assertEqual(float, type(m.optional_float))
+    self.assertEqual(float, type(m.optional_double))
+    self.assertEqual('1.0', str(m.optional_double))
+    self.assertEqual(bool, type(m.optional_bool))
+    self.assertEqual(float, type(m.repeated_float[0]))
+    self.assertEqual(float, type(m.repeated_double[0]))
+    self.assertEqual(bool, type(m.repeated_bool[0]))
+    self.assertEqual(True, m.repeated_bool[0])
+
+
+# Class to test proto2-only features (required, extensions, etc.)
+@testing_refleaks.TestCase
+class Proto2Test(unittest.TestCase):
+
+  def testFieldPresence(self):
+    message = unittest_pb2.TestAllTypes()
+
+    self.assertFalse(message.HasField("optional_int32"))
+    self.assertFalse(message.HasField("optional_bool"))
+    self.assertFalse(message.HasField("optional_nested_message"))
+
+    with self.assertRaises(ValueError):
+      message.HasField("field_doesnt_exist")
+
+    with self.assertRaises(ValueError):
+      message.HasField("repeated_int32")
+    with self.assertRaises(ValueError):
+      message.HasField("repeated_nested_message")
+
+    self.assertEqual(0, message.optional_int32)
+    self.assertEqual(False, message.optional_bool)
+    self.assertEqual(0, message.optional_nested_message.bb)
+
+    # Fields are set even when setting the values to default values.
+    message.optional_int32 = 0
+    message.optional_bool = False
+    message.optional_nested_message.bb = 0
+    self.assertTrue(message.HasField("optional_int32"))
+    self.assertTrue(message.HasField("optional_bool"))
+    self.assertTrue(message.HasField("optional_nested_message"))
+
+    # Set the fields to non-default values.
+    message.optional_int32 = 5
+    message.optional_bool = True
+    message.optional_nested_message.bb = 15
+
+    self.assertTrue(message.HasField(u"optional_int32"))
+    self.assertTrue(message.HasField("optional_bool"))
+    self.assertTrue(message.HasField("optional_nested_message"))
+
+    # Clearing the fields unsets them and resets their value to default.
+    message.ClearField("optional_int32")
+    message.ClearField(u"optional_bool")
+    message.ClearField("optional_nested_message")
+
+    self.assertFalse(message.HasField("optional_int32"))
+    self.assertFalse(message.HasField("optional_bool"))
+    self.assertFalse(message.HasField("optional_nested_message"))
+    self.assertEqual(0, message.optional_int32)
+    self.assertEqual(False, message.optional_bool)
+    self.assertEqual(0, message.optional_nested_message.bb)
+
+  def testAssignInvalidEnum(self):
+    """Assigning an invalid enum number is not allowed in proto2."""
+    m = unittest_pb2.TestAllTypes()
+
+    # Proto2 can not assign unknown enum.
+    with self.assertRaises(ValueError) as _:
+      m.optional_nested_enum = 1234567
+    self.assertRaises(ValueError, m.repeated_nested_enum.append, 1234567)
+    # Assignment is a different code path than append for the C++ impl.
+    m.repeated_nested_enum.append(2)
+    m.repeated_nested_enum[0] = 2
+    with self.assertRaises(ValueError):
+      m.repeated_nested_enum[0] = 123456
+
+    # Unknown enum value can be parsed but is ignored.
+    m2 = unittest_proto3_arena_pb2.TestAllTypes()
+    m2.optional_nested_enum = 1234567
+    m2.repeated_nested_enum.append(7654321)
+    serialized = m2.SerializeToString()
+
+    m3 = unittest_pb2.TestAllTypes()
+    m3.ParseFromString(serialized)
+    self.assertFalse(m3.HasField('optional_nested_enum'))
+    # 1 is the default value for optional_nested_enum.
+    self.assertEqual(1, m3.optional_nested_enum)
+    self.assertEqual(0, len(m3.repeated_nested_enum))
+    m2.Clear()
+    m2.ParseFromString(m3.SerializeToString())
+    self.assertEqual(1234567, m2.optional_nested_enum)
+    self.assertEqual(7654321, m2.repeated_nested_enum[0])
+
+  def testUnknownEnumMap(self):
+    m = map_proto2_unittest_pb2.TestEnumMap()
+    m.known_map_field[123] = 0
+    with self.assertRaises(ValueError):
+      m.unknown_map_field[1] = 123
+
+  def testExtensionsErrors(self):
+    msg = unittest_pb2.TestAllTypes()
+    self.assertRaises(AttributeError, getattr, msg, 'Extensions')
+
+  def testMergeFromExtensions(self):
+    msg1 = more_extensions_pb2.TopLevelMessage()
+    msg2 = more_extensions_pb2.TopLevelMessage()
+    # Cpp extension will lazily create a sub message which is immutable.
+    self.assertEqual(0, msg1.submessage.Extensions[
+        more_extensions_pb2.optional_int_extension])
+    self.assertFalse(msg1.HasField('submessage'))
+    msg2.submessage.Extensions[
+        more_extensions_pb2.optional_int_extension] = 123
+    # Make sure cmessage and extensions pointing to a mutable message
+    # after merge instead of the lazily created message.
+    msg1.MergeFrom(msg2)
+    self.assertEqual(123, msg1.submessage.Extensions[
+        more_extensions_pb2.optional_int_extension])
+
+  def testGoldenExtensions(self):
+    golden_data = test_util.GoldenFileData('golden_message')
+    golden_message = unittest_pb2.TestAllExtensions()
+    golden_message.ParseFromString(golden_data)
+    all_set = unittest_pb2.TestAllExtensions()
+    test_util.SetAllExtensions(all_set)
+    self.assertEqual(all_set, golden_message)
+    self.assertEqual(golden_data, golden_message.SerializeToString())
+    golden_copy = copy.deepcopy(golden_message)
+    self.assertEqual(golden_data, golden_copy.SerializeToString())
+
+  def testGoldenPackedExtensions(self):
+    golden_data = test_util.GoldenFileData('golden_packed_fields_message')
+    golden_message = unittest_pb2.TestPackedExtensions()
+    golden_message.ParseFromString(golden_data)
+    all_set = unittest_pb2.TestPackedExtensions()
+    test_util.SetAllPackedExtensions(all_set)
+    self.assertEqual(all_set, golden_message)
+    self.assertEqual(golden_data, all_set.SerializeToString())
+    golden_copy = copy.deepcopy(golden_message)
+    self.assertEqual(golden_data, golden_copy.SerializeToString())
+
+  def testPickleIncompleteProto(self):
+    golden_message = unittest_pb2.TestRequired(a=1)
+    pickled_message = pickle.dumps(golden_message)
+
+    unpickled_message = pickle.loads(pickled_message)
+    self.assertEqual(unpickled_message, golden_message)
+    self.assertEqual(unpickled_message.a, 1)
+    # This is still an incomplete proto - so serializing should fail
+    self.assertRaises(message.EncodeError, unpickled_message.SerializeToString)
+
+
+  # TODO(haberman): this isn't really a proto2-specific test except that this
+  # message has a required field in it.  Should probably be factored out so
+  # that we can test the other parts with proto3.
+  def testParsingMerge(self):
+    """Check the merge behavior when a required or optional field appears
+    multiple times in the input."""
+    messages = [
+        unittest_pb2.TestAllTypes(),
+        unittest_pb2.TestAllTypes(),
+        unittest_pb2.TestAllTypes() ]
+    messages[0].optional_int32 = 1
+    messages[1].optional_int64 = 2
+    messages[2].optional_int32 = 3
+    messages[2].optional_string = 'hello'
+
+    merged_message = unittest_pb2.TestAllTypes()
+    merged_message.optional_int32 = 3
+    merged_message.optional_int64 = 2
+    merged_message.optional_string = 'hello'
+
+    generator = unittest_pb2.TestParsingMerge.RepeatedFieldsGenerator()
+    generator.field1.extend(messages)
+    generator.field2.extend(messages)
+    generator.field3.extend(messages)
+    generator.ext1.extend(messages)
+    generator.ext2.extend(messages)
+    generator.group1.add().field1.MergeFrom(messages[0])
+    generator.group1.add().field1.MergeFrom(messages[1])
+    generator.group1.add().field1.MergeFrom(messages[2])
+    generator.group2.add().field1.MergeFrom(messages[0])
+    generator.group2.add().field1.MergeFrom(messages[1])
+    generator.group2.add().field1.MergeFrom(messages[2])
+
+    data = generator.SerializeToString()
+    parsing_merge = unittest_pb2.TestParsingMerge()
+    parsing_merge.ParseFromString(data)
+
+    # Required and optional fields should be merged.
+    self.assertEqual(parsing_merge.required_all_types, merged_message)
+    self.assertEqual(parsing_merge.optional_all_types, merged_message)
+    self.assertEqual(parsing_merge.optionalgroup.optional_group_all_types,
+                     merged_message)
+    self.assertEqual(parsing_merge.Extensions[
+                     unittest_pb2.TestParsingMerge.optional_ext],
+                     merged_message)
+
+    # Repeated fields should not be merged.
+    self.assertEqual(len(parsing_merge.repeated_all_types), 3)
+    self.assertEqual(len(parsing_merge.repeatedgroup), 3)
+    self.assertEqual(len(parsing_merge.Extensions[
+        unittest_pb2.TestParsingMerge.repeated_ext]), 3)
+
+  def testPythonicInit(self):
+    message = unittest_pb2.TestAllTypes(
+        optional_int32=100,
+        optional_fixed32=200,
+        optional_float=300.5,
+        optional_bytes=b'x',
+        optionalgroup={'a': 400},
+        optional_nested_message={'bb': 500},
+        optional_foreign_message={},
+        optional_nested_enum='BAZ',
+        repeatedgroup=[{'a': 600},
+                       {'a': 700}],
+        repeated_nested_enum=['FOO', unittest_pb2.TestAllTypes.BAR],
+        default_int32=800,
+        oneof_string='y')
+    self.assertIsInstance(message, unittest_pb2.TestAllTypes)
+    self.assertEqual(100, message.optional_int32)
+    self.assertEqual(200, message.optional_fixed32)
+    self.assertEqual(300.5, message.optional_float)
+    self.assertEqual(b'x', message.optional_bytes)
+    self.assertEqual(400, message.optionalgroup.a)
+    self.assertIsInstance(message.optional_nested_message,
+                          unittest_pb2.TestAllTypes.NestedMessage)
+    self.assertEqual(500, message.optional_nested_message.bb)
+    self.assertTrue(message.HasField('optional_foreign_message'))
+    self.assertEqual(message.optional_foreign_message,
+                     unittest_pb2.ForeignMessage())
+    self.assertEqual(unittest_pb2.TestAllTypes.BAZ,
+                     message.optional_nested_enum)
+    self.assertEqual(2, len(message.repeatedgroup))
+    self.assertEqual(600, message.repeatedgroup[0].a)
+    self.assertEqual(700, message.repeatedgroup[1].a)
+    self.assertEqual(2, len(message.repeated_nested_enum))
+    self.assertEqual(unittest_pb2.TestAllTypes.FOO,
+                     message.repeated_nested_enum[0])
+    self.assertEqual(unittest_pb2.TestAllTypes.BAR,
+                     message.repeated_nested_enum[1])
+    self.assertEqual(800, message.default_int32)
+    self.assertEqual('y', message.oneof_string)
+    self.assertFalse(message.HasField('optional_int64'))
+    self.assertEqual(0, len(message.repeated_float))
+    self.assertEqual(42, message.default_int64)
+
+    message = unittest_pb2.TestAllTypes(optional_nested_enum=u'BAZ')
+    self.assertEqual(unittest_pb2.TestAllTypes.BAZ,
+                     message.optional_nested_enum)
+
+    with self.assertRaises(ValueError):
+      unittest_pb2.TestAllTypes(
+          optional_nested_message={'INVALID_NESTED_FIELD': 17})
+
+    with self.assertRaises(TypeError):
+      unittest_pb2.TestAllTypes(
+          optional_nested_message={'bb': 'INVALID_VALUE_TYPE'})
+
+    with self.assertRaises(ValueError):
+      unittest_pb2.TestAllTypes(optional_nested_enum='INVALID_LABEL')
+
+    with self.assertRaises(ValueError):
+      unittest_pb2.TestAllTypes(repeated_nested_enum='FOO')
+
+  def testPythonicInitWithDict(self):
+    # Both string/unicode field name keys should work.
+    kwargs = {
+        'optional_int32': 100,
+        u'optional_fixed32': 200,
+    }
+    msg = unittest_pb2.TestAllTypes(**kwargs)
+    self.assertEqual(100, msg.optional_int32)
+    self.assertEqual(200, msg.optional_fixed32)
+
+
+  def test_documentation(self):
+    # Also used by the interactive help() function.
+    doc = pydoc.html.document(unittest_pb2.TestAllTypes, 'message')
+    self.assertIn('class TestAllTypes', doc)
+    self.assertIn('SerializePartialToString', doc)
+    self.assertIn('repeated_float', doc)
+    base = unittest_pb2.TestAllTypes.__bases__[0]
+    self.assertRaises(AttributeError, getattr, base, '_extensions_by_name')
+
+
+# Class to test proto3-only features/behavior (updated field presence & enums)
+@testing_refleaks.TestCase
+class Proto3Test(unittest.TestCase):
+
+  # Utility method for comparing equality with a map.
+  def assertMapIterEquals(self, map_iter, dict_value):
+    # Avoid mutating caller's copy.
+    dict_value = dict(dict_value)
+
+    for k, v in map_iter:
+      self.assertEqual(v, dict_value[k])
+      del dict_value[k]
+
+    self.assertEqual({}, dict_value)
+
+  def testFieldPresence(self):
+    message = unittest_proto3_arena_pb2.TestAllTypes()
+
+    # We can't test presence of non-repeated, non-submessage fields.
+    with self.assertRaises(ValueError):
+      message.HasField('optional_int32')
+    with self.assertRaises(ValueError):
+      message.HasField('optional_float')
+    with self.assertRaises(ValueError):
+      message.HasField('optional_string')
+    with self.assertRaises(ValueError):
+      message.HasField('optional_bool')
+
+    # But we can still test presence of submessage fields.
+    self.assertFalse(message.HasField('optional_nested_message'))
+
+    # As with proto2, we can't test presence of fields that don't exist, or
+    # repeated fields.
+    with self.assertRaises(ValueError):
+      message.HasField('field_doesnt_exist')
+
+    with self.assertRaises(ValueError):
+      message.HasField('repeated_int32')
+    with self.assertRaises(ValueError):
+      message.HasField('repeated_nested_message')
+
+    # Fields should default to their type-specific default.
+    self.assertEqual(0, message.optional_int32)
+    self.assertEqual(0, message.optional_float)
+    self.assertEqual('', message.optional_string)
+    self.assertEqual(False, message.optional_bool)
+    self.assertEqual(0, message.optional_nested_message.bb)
+
+    # Setting a submessage should still return proper presence information.
+    message.optional_nested_message.bb = 0
+    self.assertTrue(message.HasField('optional_nested_message'))
+
+    # Set the fields to non-default values.
+    message.optional_int32 = 5
+    message.optional_float = 1.1
+    message.optional_string = 'abc'
+    message.optional_bool = True
+    message.optional_nested_message.bb = 15
+
+    # Clearing the fields unsets them and resets their value to default.
+    message.ClearField('optional_int32')
+    message.ClearField('optional_float')
+    message.ClearField('optional_string')
+    message.ClearField('optional_bool')
+    message.ClearField('optional_nested_message')
+
+    self.assertEqual(0, message.optional_int32)
+    self.assertEqual(0, message.optional_float)
+    self.assertEqual('', message.optional_string)
+    self.assertEqual(False, message.optional_bool)
+    self.assertEqual(0, message.optional_nested_message.bb)
+
+  def testProto3ParserDropDefaultScalar(self):
+    message_proto2 = unittest_pb2.TestAllTypes()
+    message_proto2.optional_int32 = 0
+    message_proto2.optional_string = ''
+    message_proto2.optional_bytes = b''
+    self.assertEqual(len(message_proto2.ListFields()), 3)
+
+    message_proto3 = unittest_proto3_arena_pb2.TestAllTypes()
+    message_proto3.ParseFromString(message_proto2.SerializeToString())
+    self.assertEqual(len(message_proto3.ListFields()), 0)
+
+  def testProto3Optional(self):
+    msg = test_proto3_optional_pb2.TestProto3Optional()
+    self.assertFalse(msg.HasField('optional_int32'))
+    self.assertFalse(msg.HasField('optional_float'))
+    self.assertFalse(msg.HasField('optional_string'))
+    self.assertFalse(msg.HasField('optional_nested_message'))
+    self.assertFalse(msg.optional_nested_message.HasField('bb'))
+
+    # Set fields.
+    msg.optional_int32 = 1
+    msg.optional_float = 1.0
+    msg.optional_string = '123'
+    msg.optional_nested_message.bb = 1
+    self.assertTrue(msg.HasField('optional_int32'))
+    self.assertTrue(msg.HasField('optional_float'))
+    self.assertTrue(msg.HasField('optional_string'))
+    self.assertTrue(msg.HasField('optional_nested_message'))
+    self.assertTrue(msg.optional_nested_message.HasField('bb'))
+    # Set to default value does not clear the fields
+    msg.optional_int32 = 0
+    msg.optional_float = 0.0
+    msg.optional_string = ''
+    msg.optional_nested_message.bb = 0
+    self.assertTrue(msg.HasField('optional_int32'))
+    self.assertTrue(msg.HasField('optional_float'))
+    self.assertTrue(msg.HasField('optional_string'))
+    self.assertTrue(msg.HasField('optional_nested_message'))
+    self.assertTrue(msg.optional_nested_message.HasField('bb'))
+
+    # Test serialize
+    msg2 = test_proto3_optional_pb2.TestProto3Optional()
+    msg2.ParseFromString(msg.SerializeToString())
+    self.assertTrue(msg2.HasField('optional_int32'))
+    self.assertTrue(msg2.HasField('optional_float'))
+    self.assertTrue(msg2.HasField('optional_string'))
+    self.assertTrue(msg2.HasField('optional_nested_message'))
+    self.assertTrue(msg2.optional_nested_message.HasField('bb'))
+
+    self.assertEqual(msg.WhichOneof('_optional_int32'), 'optional_int32')
+
+    # Clear these fields.
+    msg.ClearField('optional_int32')
+    msg.ClearField('optional_float')
+    msg.ClearField('optional_string')
+    msg.ClearField('optional_nested_message')
+    self.assertFalse(msg.HasField('optional_int32'))
+    self.assertFalse(msg.HasField('optional_float'))
+    self.assertFalse(msg.HasField('optional_string'))
+    self.assertFalse(msg.HasField('optional_nested_message'))
+    self.assertFalse(msg.optional_nested_message.HasField('bb'))
+
+    self.assertEqual(msg.WhichOneof('_optional_int32'), None)
+
+  def testAssignUnknownEnum(self):
+    """Assigning an unknown enum value is allowed and preserves the value."""
+    m = unittest_proto3_arena_pb2.TestAllTypes()
+
+    # Proto3 can assign unknown enums.
+    m.optional_nested_enum = 1234567
+    self.assertEqual(1234567, m.optional_nested_enum)
+    m.repeated_nested_enum.append(22334455)
+    self.assertEqual(22334455, m.repeated_nested_enum[0])
+    # Assignment is a different code path than append for the C++ impl.
+    m.repeated_nested_enum[0] = 7654321
+    self.assertEqual(7654321, m.repeated_nested_enum[0])
+    serialized = m.SerializeToString()
+
+    m2 = unittest_proto3_arena_pb2.TestAllTypes()
+    m2.ParseFromString(serialized)
+    self.assertEqual(1234567, m2.optional_nested_enum)
+    self.assertEqual(7654321, m2.repeated_nested_enum[0])
+
+  # Map isn't really a proto3-only feature. But there is no proto2 equivalent
+  # of google/protobuf/map_unittest.proto right now, so it's not easy to
+  # test both with the same test like we do for the other proto2/proto3 tests.
+  # (google/protobuf/map_proto2_unittest.proto is very different in the set
+  # of messages and fields it contains).
+  def testScalarMapDefaults(self):
+    msg = map_unittest_pb2.TestMap()
+
+    # Scalars start out unset.
+    self.assertFalse(-123 in msg.map_int32_int32)
+    self.assertFalse(-2**33 in msg.map_int64_int64)
+    self.assertFalse(123 in msg.map_uint32_uint32)
+    self.assertFalse(2**33 in msg.map_uint64_uint64)
+    self.assertFalse(123 in msg.map_int32_double)
+    self.assertFalse(False in msg.map_bool_bool)
+    self.assertFalse('abc' in msg.map_string_string)
+    self.assertFalse(111 in msg.map_int32_bytes)
+    self.assertFalse(888 in msg.map_int32_enum)
+
+    # Accessing an unset key returns the default.
+    self.assertEqual(0, msg.map_int32_int32[-123])
+    self.assertEqual(0, msg.map_int64_int64[-2**33])
+    self.assertEqual(0, msg.map_uint32_uint32[123])
+    self.assertEqual(0, msg.map_uint64_uint64[2**33])
+    self.assertEqual(0.0, msg.map_int32_double[123])
+    self.assertTrue(isinstance(msg.map_int32_double[123], float))
+    self.assertEqual(False, msg.map_bool_bool[False])
+    self.assertTrue(isinstance(msg.map_bool_bool[False], bool))
+    self.assertEqual('', msg.map_string_string['abc'])
+    self.assertEqual(b'', msg.map_int32_bytes[111])
+    self.assertEqual(0, msg.map_int32_enum[888])
+
+    # It also sets the value in the map
+    self.assertTrue(-123 in msg.map_int32_int32)
+    self.assertTrue(-2**33 in msg.map_int64_int64)
+    self.assertTrue(123 in msg.map_uint32_uint32)
+    self.assertTrue(2**33 in msg.map_uint64_uint64)
+    self.assertTrue(123 in msg.map_int32_double)
+    self.assertTrue(False in msg.map_bool_bool)
+    self.assertTrue('abc' in msg.map_string_string)
+    self.assertTrue(111 in msg.map_int32_bytes)
+    self.assertTrue(888 in msg.map_int32_enum)
+
+    self.assertIsInstance(msg.map_string_string['abc'], six.text_type)
+
+    # Accessing an unset key still throws TypeError if the type of the key
+    # is incorrect.
+    with self.assertRaises(TypeError):
+      msg.map_string_string[123]
+
+    with self.assertRaises(TypeError):
+      123 in msg.map_string_string
+
+  def testMapGet(self):
+    # Need to test that get() properly returns the default, even though the dict
+    # has defaultdict-like semantics.
+    msg = map_unittest_pb2.TestMap()
+
+    self.assertIsNone(msg.map_int32_int32.get(5))
+    self.assertEqual(10, msg.map_int32_int32.get(5, 10))
+    self.assertEqual(10, msg.map_int32_int32.get(key=5, default=10))
+    self.assertIsNone(msg.map_int32_int32.get(5))
+
+    msg.map_int32_int32[5] = 15
+    self.assertEqual(15, msg.map_int32_int32.get(5))
+    self.assertEqual(15, msg.map_int32_int32.get(5))
+    with self.assertRaises(TypeError):
+      msg.map_int32_int32.get('')
+
+    self.assertIsNone(msg.map_int32_foreign_message.get(5))
+    self.assertEqual(10, msg.map_int32_foreign_message.get(5, 10))
+    self.assertEqual(10, msg.map_int32_foreign_message.get(key=5, default=10))
+
+    submsg = msg.map_int32_foreign_message[5]
+    self.assertIs(submsg, msg.map_int32_foreign_message.get(5))
+    with self.assertRaises(TypeError):
+      msg.map_int32_foreign_message.get('')
+
+  def testScalarMap(self):
+    msg = map_unittest_pb2.TestMap()
+
+    self.assertEqual(0, len(msg.map_int32_int32))
+    self.assertFalse(5 in msg.map_int32_int32)
+
+    msg.map_int32_int32[-123] = -456
+    msg.map_int64_int64[-2**33] = -2**34
+    msg.map_uint32_uint32[123] = 456
+    msg.map_uint64_uint64[2**33] = 2**34
+    msg.map_int32_float[2] = 1.2
+    msg.map_int32_double[1] = 3.3
+    msg.map_string_string['abc'] = '123'
+    msg.map_bool_bool[True] = True
+    msg.map_int32_enum[888] = 2
+    # Unknown numeric enum is supported in proto3.
+    msg.map_int32_enum[123] = 456
+
+    self.assertEqual([], msg.FindInitializationErrors())
+
+    self.assertEqual(1, len(msg.map_string_string))
+
+    # Bad key.
+    with self.assertRaises(TypeError):
+      msg.map_string_string[123] = '123'
+
+    # Verify that trying to assign a bad key doesn't actually add a member to
+    # the map.
+    self.assertEqual(1, len(msg.map_string_string))
+
+    # Bad value.
+    with self.assertRaises(TypeError):
+      msg.map_string_string['123'] = 123
+
+    serialized = msg.SerializeToString()
+    msg2 = map_unittest_pb2.TestMap()
+    msg2.ParseFromString(serialized)
+
+    # Bad key.
+    with self.assertRaises(TypeError):
+      msg2.map_string_string[123] = '123'
+
+    # Bad value.
+    with self.assertRaises(TypeError):
+      msg2.map_string_string['123'] = 123
+
+    self.assertEqual(-456, msg2.map_int32_int32[-123])
+    self.assertEqual(-2**34, msg2.map_int64_int64[-2**33])
+    self.assertEqual(456, msg2.map_uint32_uint32[123])
+    self.assertEqual(2**34, msg2.map_uint64_uint64[2**33])
+    self.assertAlmostEqual(1.2, msg.map_int32_float[2])
+    self.assertEqual(3.3, msg.map_int32_double[1])
+    self.assertEqual('123', msg2.map_string_string['abc'])
+    self.assertEqual(True, msg2.map_bool_bool[True])
+    self.assertEqual(2, msg2.map_int32_enum[888])
+    self.assertEqual(456, msg2.map_int32_enum[123])
+    self.assertEqual('{-123: -456}',
+                     str(msg2.map_int32_int32))
+
+  def testMapEntryAlwaysSerialized(self):
+    msg = map_unittest_pb2.TestMap()
+    msg.map_int32_int32[0] = 0
+    msg.map_string_string[''] = ''
+    self.assertEqual(msg.ByteSize(), 12)
+    self.assertEqual(b'\n\x04\x08\x00\x10\x00r\x04\n\x00\x12\x00',
+                     msg.SerializeToString())
+
+  def testStringUnicodeConversionInMap(self):
+    msg = map_unittest_pb2.TestMap()
+
+    unicode_obj = u'\u1234'
+    bytes_obj = unicode_obj.encode('utf8')
+
+    msg.map_string_string[bytes_obj] = bytes_obj
+
+    (key, value) = list(msg.map_string_string.items())[0]
+
+    self.assertEqual(key, unicode_obj)
+    self.assertEqual(value, unicode_obj)
+
+    self.assertIsInstance(key, six.text_type)
+    self.assertIsInstance(value, six.text_type)
+
+  def testMessageMap(self):
+    msg = map_unittest_pb2.TestMap()
+
+    self.assertEqual(0, len(msg.map_int32_foreign_message))
+    self.assertFalse(5 in msg.map_int32_foreign_message)
+
+    msg.map_int32_foreign_message[123]
+    # get_or_create() is an alias for getitem.
+    msg.map_int32_foreign_message.get_or_create(-456)
+
+    self.assertEqual(2, len(msg.map_int32_foreign_message))
+    self.assertIn(123, msg.map_int32_foreign_message)
+    self.assertIn(-456, msg.map_int32_foreign_message)
+    self.assertEqual(2, len(msg.map_int32_foreign_message))
+
+    # Bad key.
+    with self.assertRaises(TypeError):
+      msg.map_int32_foreign_message['123']
+
+    # Can't assign directly to submessage.
+    with self.assertRaises(ValueError):
+      msg.map_int32_foreign_message[999] = msg.map_int32_foreign_message[123]
+
+    # Verify that trying to assign a bad key doesn't actually add a member to
+    # the map.
+    self.assertEqual(2, len(msg.map_int32_foreign_message))
+
+    serialized = msg.SerializeToString()
+    msg2 = map_unittest_pb2.TestMap()
+    msg2.ParseFromString(serialized)
+
+    self.assertEqual(2, len(msg2.map_int32_foreign_message))
+    self.assertIn(123, msg2.map_int32_foreign_message)
+    self.assertIn(-456, msg2.map_int32_foreign_message)
+    self.assertEqual(2, len(msg2.map_int32_foreign_message))
+    msg2.map_int32_foreign_message[123].c = 1
+    # TODO(jieluo): Fix text format for message map.
+    self.assertIn(str(msg2.map_int32_foreign_message),
+                  ('{-456: , 123: c: 1\n}', '{123: c: 1\n, -456: }'))
+
+  def testNestedMessageMapItemDelete(self):
+    msg = map_unittest_pb2.TestMap()
+    msg.map_int32_all_types[1].optional_nested_message.bb = 1
+    del msg.map_int32_all_types[1]
+    msg.map_int32_all_types[2].optional_nested_message.bb = 2
+    self.assertEqual(1, len(msg.map_int32_all_types))
+    msg.map_int32_all_types[1].optional_nested_message.bb = 1
+    self.assertEqual(2, len(msg.map_int32_all_types))
+
+    serialized = msg.SerializeToString()
+    msg2 = map_unittest_pb2.TestMap()
+    msg2.ParseFromString(serialized)
+    keys = [1, 2]
+    # The loop triggers PyErr_Occurred() in c extension.
+    for key in keys:
+      del msg2.map_int32_all_types[key]
+
+  def testMapByteSize(self):
+    msg = map_unittest_pb2.TestMap()
+    msg.map_int32_int32[1] = 1
+    size = msg.ByteSize()
+    msg.map_int32_int32[1] = 128
+    self.assertEqual(msg.ByteSize(), size + 1)
+
+    msg.map_int32_foreign_message[19].c = 1
+    size = msg.ByteSize()
+    msg.map_int32_foreign_message[19].c = 128
+    self.assertEqual(msg.ByteSize(), size + 1)
+
+  def testMergeFrom(self):
+    msg = map_unittest_pb2.TestMap()
+    msg.map_int32_int32[12] = 34
+    msg.map_int32_int32[56] = 78
+    msg.map_int64_int64[22] = 33
+    msg.map_int32_foreign_message[111].c = 5
+    msg.map_int32_foreign_message[222].c = 10
+
+    msg2 = map_unittest_pb2.TestMap()
+    msg2.map_int32_int32[12] = 55
+    msg2.map_int64_int64[88] = 99
+    msg2.map_int32_foreign_message[222].c = 15
+    msg2.map_int32_foreign_message[222].d = 20
+    old_map_value = msg2.map_int32_foreign_message[222]
+
+    msg2.MergeFrom(msg)
+    # Compare with expected message instead of call
+    # msg2.map_int32_foreign_message[222] to make sure MergeFrom does not
+    # sync with repeated field and there is no duplicated keys.
+    expected_msg = map_unittest_pb2.TestMap()
+    expected_msg.CopyFrom(msg)
+    expected_msg.map_int64_int64[88] = 99
+    self.assertEqual(msg2, expected_msg)
+
+    self.assertEqual(34, msg2.map_int32_int32[12])
+    self.assertEqual(78, msg2.map_int32_int32[56])
+    self.assertEqual(33, msg2.map_int64_int64[22])
+    self.assertEqual(99, msg2.map_int64_int64[88])
+    self.assertEqual(5, msg2.map_int32_foreign_message[111].c)
+    self.assertEqual(10, msg2.map_int32_foreign_message[222].c)
+    self.assertFalse(msg2.map_int32_foreign_message[222].HasField('d'))
+    if api_implementation.Type() != 'cpp':
+      # During the call to MergeFrom(), the C++ implementation will have
+      # deallocated the underlying message, but this is very difficult to detect
+      # properly. The line below is likely to cause a segmentation fault.
+      # With the Python implementation, old_map_value is just 'detached' from
+      # the main message. Using it will not crash of course, but since it still
+      # have a reference to the parent message I'm sure we can find interesting
+      # ways to cause inconsistencies.
+      self.assertEqual(15, old_map_value.c)
+
+    # Verify that there is only one entry per key, even though the MergeFrom
+    # may have internally created multiple entries for a single key in the
+    # list representation.
+    as_dict = {}
+    for key in msg2.map_int32_foreign_message:
+      self.assertFalse(key in as_dict)
+      as_dict[key] = msg2.map_int32_foreign_message[key].c
+
+    self.assertEqual({111: 5, 222: 10}, as_dict)
+
+    # Special case: test that delete of item really removes the item, even if
+    # there might have physically been duplicate keys due to the previous merge.
+    # This is only a special case for the C++ implementation which stores the
+    # map as an array.
+    del msg2.map_int32_int32[12]
+    self.assertFalse(12 in msg2.map_int32_int32)
+
+    del msg2.map_int32_foreign_message[222]
+    self.assertFalse(222 in msg2.map_int32_foreign_message)
+    with self.assertRaises(TypeError):
+      del msg2.map_int32_foreign_message['']
+
+  def testMapMergeFrom(self):
+    msg = map_unittest_pb2.TestMap()
+    msg.map_int32_int32[12] = 34
+    msg.map_int32_int32[56] = 78
+    msg.map_int64_int64[22] = 33
+    msg.map_int32_foreign_message[111].c = 5
+    msg.map_int32_foreign_message[222].c = 10
+
+    msg2 = map_unittest_pb2.TestMap()
+    msg2.map_int32_int32[12] = 55
+    msg2.map_int64_int64[88] = 99
+    msg2.map_int32_foreign_message[222].c = 15
+    msg2.map_int32_foreign_message[222].d = 20
+
+    msg2.map_int32_int32.MergeFrom(msg.map_int32_int32)
+    self.assertEqual(34, msg2.map_int32_int32[12])
+    self.assertEqual(78, msg2.map_int32_int32[56])
+
+    msg2.map_int64_int64.MergeFrom(msg.map_int64_int64)
+    self.assertEqual(33, msg2.map_int64_int64[22])
+    self.assertEqual(99, msg2.map_int64_int64[88])
+
+    msg2.map_int32_foreign_message.MergeFrom(msg.map_int32_foreign_message)
+    # Compare with expected message instead of call
+    # msg.map_int32_foreign_message[222] to make sure MergeFrom does not
+    # sync with repeated field and no duplicated keys.
+    expected_msg = map_unittest_pb2.TestMap()
+    expected_msg.CopyFrom(msg)
+    expected_msg.map_int64_int64[88] = 99
+    self.assertEqual(msg2, expected_msg)
+
+    # Test when cpp extension cache a map.
+    m1 = map_unittest_pb2.TestMap()
+    m2 = map_unittest_pb2.TestMap()
+    self.assertEqual(m1.map_int32_foreign_message,
+                     m1.map_int32_foreign_message)
+    m2.map_int32_foreign_message[123].c = 10
+    m1.MergeFrom(m2)
+    self.assertEqual(10, m2.map_int32_foreign_message[123].c)
+
+    # Test merge maps within different message types.
+    m1 = map_unittest_pb2.TestMap()
+    m2 = map_unittest_pb2.TestMessageMap()
+    m2.map_int32_message[123].optional_int32 = 10
+    m1.map_int32_all_types.MergeFrom(m2.map_int32_message)
+    self.assertEqual(10, m1.map_int32_all_types[123].optional_int32)
+
+    # Test overwrite message value map
+    msg = map_unittest_pb2.TestMap()
+    msg.map_int32_foreign_message[222].c = 123
+    msg2 = map_unittest_pb2.TestMap()
+    msg2.map_int32_foreign_message[222].d = 20
+    msg.MergeFromString(msg2.SerializeToString())
+    self.assertEqual(msg.map_int32_foreign_message[222].d, 20)
+    self.assertNotEqual(msg.map_int32_foreign_message[222].c, 123)
+
+  def testMergeFromBadType(self):
+    msg = map_unittest_pb2.TestMap()
+    with self.assertRaisesRegexp(
+        TypeError,
+        r'Parameter to MergeFrom\(\) must be instance of same class: expected '
+        r'.*TestMap got int\.'):
+      msg.MergeFrom(1)
+
+  def testCopyFromBadType(self):
+    msg = map_unittest_pb2.TestMap()
+    with self.assertRaisesRegexp(
+        TypeError,
+        r'Parameter to [A-Za-z]*From\(\) must be instance of same class: '
+        r'expected .*TestMap got int\.'):
+      msg.CopyFrom(1)
+
+  def testIntegerMapWithLongs(self):
+    msg = map_unittest_pb2.TestMap()
+    msg.map_int32_int32[long(-123)] = long(-456)
+    msg.map_int64_int64[long(-2**33)] = long(-2**34)
+    msg.map_uint32_uint32[long(123)] = long(456)
+    msg.map_uint64_uint64[long(2**33)] = long(2**34)
+
+    serialized = msg.SerializeToString()
+    msg2 = map_unittest_pb2.TestMap()
+    msg2.ParseFromString(serialized)
+
+    self.assertEqual(-456, msg2.map_int32_int32[-123])
+    self.assertEqual(-2**34, msg2.map_int64_int64[-2**33])
+    self.assertEqual(456, msg2.map_uint32_uint32[123])
+    self.assertEqual(2**34, msg2.map_uint64_uint64[2**33])
+
+  def testMapAssignmentCausesPresence(self):
+    msg = map_unittest_pb2.TestMapSubmessage()
+    msg.test_map.map_int32_int32[123] = 456
+
+    serialized = msg.SerializeToString()
+    msg2 = map_unittest_pb2.TestMapSubmessage()
+    msg2.ParseFromString(serialized)
+
+    self.assertEqual(msg, msg2)
+
+    # Now test that various mutations of the map properly invalidate the
+    # cached size of the submessage.
+    msg.test_map.map_int32_int32[888] = 999
+    serialized = msg.SerializeToString()
+    msg2.ParseFromString(serialized)
+    self.assertEqual(msg, msg2)
+
+    msg.test_map.map_int32_int32.clear()
+    serialized = msg.SerializeToString()
+    msg2.ParseFromString(serialized)
+    self.assertEqual(msg, msg2)
+
+  def testMapAssignmentCausesPresenceForSubmessages(self):
+    msg = map_unittest_pb2.TestMapSubmessage()
+    msg.test_map.map_int32_foreign_message[123].c = 5
+
+    serialized = msg.SerializeToString()
+    msg2 = map_unittest_pb2.TestMapSubmessage()
+    msg2.ParseFromString(serialized)
+
+    self.assertEqual(msg, msg2)
+
+    # Now test that various mutations of the map properly invalidate the
+    # cached size of the submessage.
+    msg.test_map.map_int32_foreign_message[888].c = 7
+    serialized = msg.SerializeToString()
+    msg2.ParseFromString(serialized)
+    self.assertEqual(msg, msg2)
+
+    msg.test_map.map_int32_foreign_message[888].MergeFrom(
+        msg.test_map.map_int32_foreign_message[123])
+    serialized = msg.SerializeToString()
+    msg2.ParseFromString(serialized)
+    self.assertEqual(msg, msg2)
+
+    msg.test_map.map_int32_foreign_message.clear()
+    serialized = msg.SerializeToString()
+    msg2.ParseFromString(serialized)
+    self.assertEqual(msg, msg2)
+
+  def testModifyMapWhileIterating(self):
+    msg = map_unittest_pb2.TestMap()
+
+    string_string_iter = iter(msg.map_string_string)
+    int32_foreign_iter = iter(msg.map_int32_foreign_message)
+
+    msg.map_string_string['abc'] = '123'
+    msg.map_int32_foreign_message[5].c = 5
+
+    with self.assertRaises(RuntimeError):
+      for key in string_string_iter:
+        pass
+
+    with self.assertRaises(RuntimeError):
+      for key in int32_foreign_iter:
+        pass
+
+  def testSubmessageMap(self):
+    msg = map_unittest_pb2.TestMap()
+
+    submsg = msg.map_int32_foreign_message[111]
+    self.assertIs(submsg, msg.map_int32_foreign_message[111])
+    self.assertIsInstance(submsg, unittest_pb2.ForeignMessage)
+
+    submsg.c = 5
+
+    serialized = msg.SerializeToString()
+    msg2 = map_unittest_pb2.TestMap()
+    msg2.ParseFromString(serialized)
+
+    self.assertEqual(5, msg2.map_int32_foreign_message[111].c)
+
+    # Doesn't allow direct submessage assignment.
+    with self.assertRaises(ValueError):
+      msg.map_int32_foreign_message[88] = unittest_pb2.ForeignMessage()
+
+  def testMapIteration(self):
+    msg = map_unittest_pb2.TestMap()
+
+    for k, v in msg.map_int32_int32.items():
+      # Should not be reached.
+      self.assertTrue(False)
+
+    msg.map_int32_int32[2] = 4
+    msg.map_int32_int32[3] = 6
+    msg.map_int32_int32[4] = 8
+    self.assertEqual(3, len(msg.map_int32_int32))
+
+    matching_dict = {2: 4, 3: 6, 4: 8}
+    self.assertMapIterEquals(msg.map_int32_int32.items(), matching_dict)
+
+  def testPython2Map(self):
+    if sys.version_info < (3,):
+      msg = map_unittest_pb2.TestMap()
+      msg.map_int32_int32[2] = 4
+      msg.map_int32_int32[3] = 6
+      msg.map_int32_int32[4] = 8
+      msg.map_int32_int32[5] = 10
+      map_int32 = msg.map_int32_int32
+      self.assertEqual(4, len(map_int32))
+      msg2 = map_unittest_pb2.TestMap()
+      msg2.ParseFromString(msg.SerializeToString())
+
+      def CheckItems(seq, iterator):
+        self.assertEqual(next(iterator), seq[0])
+        self.assertEqual(list(iterator), seq[1:])
+
+      CheckItems(map_int32.items(), map_int32.iteritems())
+      CheckItems(map_int32.keys(), map_int32.iterkeys())
+      CheckItems(map_int32.values(), map_int32.itervalues())
+
+      self.assertEqual(6, map_int32.get(3))
+      self.assertEqual(None, map_int32.get(999))
+      self.assertEqual(6, map_int32.pop(3))
+      self.assertEqual(0, map_int32.pop(3))
+      self.assertEqual(3, len(map_int32))
+      key, value = map_int32.popitem()
+      self.assertEqual(2 * key, value)
+      self.assertEqual(2, len(map_int32))
+      map_int32.clear()
+      self.assertEqual(0, len(map_int32))
+
+      with self.assertRaises(KeyError):
+        map_int32.popitem()
+
+      self.assertEqual(0, map_int32.setdefault(2))
+      self.assertEqual(1, len(map_int32))
+
+      map_int32.update(msg2.map_int32_int32)
+      self.assertEqual(4, len(map_int32))
+
+      with self.assertRaises(TypeError):
+        map_int32.update(msg2.map_int32_int32,
+                         msg2.map_int32_int32)
+      with self.assertRaises(TypeError):
+        map_int32.update(0)
+      with self.assertRaises(TypeError):
+        map_int32.update(value=12)
+
+  def testMapItems(self):
+    # Map items used to have strange behaviors when use c extension. Because
+    # [] may reorder the map and invalidate any exsting iterators.
+    # TODO(jieluo): Check if [] reordering the map is a bug or intended
+    # behavior.
+    msg = map_unittest_pb2.TestMap()
+    msg.map_string_string['local_init_op'] = ''
+    msg.map_string_string['trainable_variables'] = ''
+    msg.map_string_string['variables'] = ''
+    msg.map_string_string['init_op'] = ''
+    msg.map_string_string['summaries'] = ''
+    items1 = msg.map_string_string.items()
+    items2 = msg.map_string_string.items()
+    self.assertEqual(items1, items2)
+
+  def testMapDeterministicSerialization(self):
+    golden_data = (b'r\x0c\n\x07init_op\x12\x01d'
+                   b'r\n\n\x05item1\x12\x01e'
+                   b'r\n\n\x05item2\x12\x01f'
+                   b'r\n\n\x05item3\x12\x01g'
+                   b'r\x0b\n\x05item4\x12\x02QQ'
+                   b'r\x12\n\rlocal_init_op\x12\x01a'
+                   b'r\x0e\n\tsummaries\x12\x01e'
+                   b'r\x18\n\x13trainable_variables\x12\x01b'
+                   b'r\x0e\n\tvariables\x12\x01c')
+    msg = map_unittest_pb2.TestMap()
+    msg.map_string_string['local_init_op'] = 'a'
+    msg.map_string_string['trainable_variables'] = 'b'
+    msg.map_string_string['variables'] = 'c'
+    msg.map_string_string['init_op'] = 'd'
+    msg.map_string_string['summaries'] = 'e'
+    msg.map_string_string['item1'] = 'e'
+    msg.map_string_string['item2'] = 'f'
+    msg.map_string_string['item3'] = 'g'
+    msg.map_string_string['item4'] = 'QQ'
+
+    # If deterministic serialization is not working correctly, this will be
+    # "flaky" depending on the exact python dict hash seed.
+    #
+    # Fortunately, there are enough items in this map that it is extremely
+    # unlikely to ever hit the "right" in-order combination, so the test
+    # itself should fail reliably.
+    self.assertEqual(golden_data, msg.SerializeToString(deterministic=True))
+
+  def testMapIterationClearMessage(self):
+    # Iterator needs to work even if message and map are deleted.
+    msg = map_unittest_pb2.TestMap()
+
+    msg.map_int32_int32[2] = 4
+    msg.map_int32_int32[3] = 6
+    msg.map_int32_int32[4] = 8
+
+    it = msg.map_int32_int32.items()
+    del msg
+
+    matching_dict = {2: 4, 3: 6, 4: 8}
+    self.assertMapIterEquals(it, matching_dict)
+
+  def testMapConstruction(self):
+    msg = map_unittest_pb2.TestMap(map_int32_int32={1: 2, 3: 4})
+    self.assertEqual(2, msg.map_int32_int32[1])
+    self.assertEqual(4, msg.map_int32_int32[3])
+
+    msg = map_unittest_pb2.TestMap(
+        map_int32_foreign_message={3: unittest_pb2.ForeignMessage(c=5)})
+    self.assertEqual(5, msg.map_int32_foreign_message[3].c)
+
+  def testMapScalarFieldConstruction(self):
+    msg1 = map_unittest_pb2.TestMap()
+    msg1.map_int32_int32[1] = 42
+    msg2 = map_unittest_pb2.TestMap(map_int32_int32=msg1.map_int32_int32)
+    self.assertEqual(42, msg2.map_int32_int32[1])
+
+  def testMapMessageFieldConstruction(self):
+    msg1 = map_unittest_pb2.TestMap()
+    msg1.map_string_foreign_message['test'].c = 42
+    msg2 = map_unittest_pb2.TestMap(
+      map_string_foreign_message=msg1.map_string_foreign_message)
+    self.assertEqual(42, msg2.map_string_foreign_message['test'].c)
+
+  def testMapFieldRaisesCorrectError(self):
+    # Should raise a TypeError when given a non-iterable.
+    with self.assertRaises(TypeError):
+      map_unittest_pb2.TestMap(map_string_foreign_message=1)
+
+  def testMapValidAfterFieldCleared(self):
+    # Map needs to work even if field is cleared.
+    # For the C++ implementation this tests the correctness of
+    # MapContainer::Release()
+    msg = map_unittest_pb2.TestMap()
+    int32_map = msg.map_int32_int32
+
+    int32_map[2] = 4
+    int32_map[3] = 6
+    int32_map[4] = 8
+
+    msg.ClearField('map_int32_int32')
+    self.assertEqual(b'', msg.SerializeToString())
+    matching_dict = {2: 4, 3: 6, 4: 8}
+    self.assertMapIterEquals(int32_map.items(), matching_dict)
+
+  def testMessageMapValidAfterFieldCleared(self):
+    # Map needs to work even if field is cleared.
+    # For the C++ implementation this tests the correctness of
+    # MapContainer::Release()
+    msg = map_unittest_pb2.TestMap()
+    int32_foreign_message = msg.map_int32_foreign_message
+
+    int32_foreign_message[2].c = 5
+
+    msg.ClearField('map_int32_foreign_message')
+    self.assertEqual(b'', msg.SerializeToString())
+    self.assertTrue(2 in int32_foreign_message.keys())
+
+  def testMessageMapItemValidAfterTopMessageCleared(self):
+    # Message map item needs to work even if it is cleared.
+    # For the C++ implementation this tests the correctness of
+    # MapContainer::Release()
+    msg = map_unittest_pb2.TestMap()
+    msg.map_int32_all_types[2].optional_string = 'bar'
+
+    if api_implementation.Type() == 'cpp':
+      # Need to keep the map reference because of b/27942626.
+      # TODO(jieluo): Remove it.
+      unused_map = msg.map_int32_all_types  # pylint: disable=unused-variable
+    msg_value = msg.map_int32_all_types[2]
+    msg.Clear()
+
+    # Reset to trigger sync between repeated field and map in c++.
+    msg.map_int32_all_types[3].optional_string = 'foo'
+    self.assertEqual(msg_value.optional_string, 'bar')
+
+  def testMapIterInvalidatedByClearField(self):
+    # Map iterator is invalidated when field is cleared.
+    # But this case does need to not crash the interpreter.
+    # For the C++ implementation this tests the correctness of
+    # ScalarMapContainer::Release()
+    msg = map_unittest_pb2.TestMap()
+
+    it = iter(msg.map_int32_int32)
+
+    msg.ClearField('map_int32_int32')
+    with self.assertRaises(RuntimeError):
+      for _ in it:
+        pass
+
+    it = iter(msg.map_int32_foreign_message)
+    msg.ClearField('map_int32_foreign_message')
+    with self.assertRaises(RuntimeError):
+      for _ in it:
+        pass
+
+  def testMapDelete(self):
+    msg = map_unittest_pb2.TestMap()
+
+    self.assertEqual(0, len(msg.map_int32_int32))
+
+    msg.map_int32_int32[4] = 6
+    self.assertEqual(1, len(msg.map_int32_int32))
+
+    with self.assertRaises(KeyError):
+      del msg.map_int32_int32[88]
+
+    del msg.map_int32_int32[4]
+    self.assertEqual(0, len(msg.map_int32_int32))
+
+    with self.assertRaises(KeyError):
+      del msg.map_int32_all_types[32]
+
+  def testMapsAreMapping(self):
+    msg = map_unittest_pb2.TestMap()
+    self.assertIsInstance(msg.map_int32_int32, collections_abc.Mapping)
+    self.assertIsInstance(msg.map_int32_int32, collections_abc.MutableMapping)
+    self.assertIsInstance(msg.map_int32_foreign_message, collections_abc.Mapping)
+    self.assertIsInstance(msg.map_int32_foreign_message,
+                          collections_abc.MutableMapping)
+
+  def testMapsCompare(self):
+    msg = map_unittest_pb2.TestMap()
+    msg.map_int32_int32[-123] = -456
+    self.assertEqual(msg.map_int32_int32, msg.map_int32_int32)
+    self.assertEqual(msg.map_int32_foreign_message,
+                     msg.map_int32_foreign_message)
+    self.assertNotEqual(msg.map_int32_int32, 0)
+
+  def testMapFindInitializationErrorsSmokeTest(self):
+    msg = map_unittest_pb2.TestMap()
+    msg.map_string_string['abc'] = '123'
+    msg.map_int32_int32[35] = 64
+    msg.map_string_foreign_message['foo'].c = 5
+    self.assertEqual(0, len(msg.FindInitializationErrors()))
+
+  @unittest.skipIf(sys.maxunicode == UCS2_MAXUNICODE, 'Skip for ucs2')
+  def testStrictUtf8Check(self):
+    # Test u'\ud801' is rejected at parser in both python2 and python3.
+    serialized = (b'r\x03\xed\xa0\x81')
+    msg = unittest_proto3_arena_pb2.TestAllTypes()
+    with self.assertRaises(Exception) as context:
+      msg.MergeFromString(serialized)
+    if api_implementation.Type() == 'python':
+      self.assertIn('optional_string', str(context.exception))
+    else:
+      self.assertIn('Error parsing message', str(context.exception))
+
+    # Test optional_string=u'😍' is accepted.
+    serialized = unittest_proto3_arena_pb2.TestAllTypes(
+        optional_string=u'😍').SerializeToString()
+    msg2 = unittest_proto3_arena_pb2.TestAllTypes()
+    msg2.MergeFromString(serialized)
+    self.assertEqual(msg2.optional_string, u'😍')
+
+    msg = unittest_proto3_arena_pb2.TestAllTypes(
+        optional_string=u'\ud001')
+    self.assertEqual(msg.optional_string, u'\ud001')
+
+  @unittest.skipIf(six.PY2, 'Surrogates are acceptable in python2')
+  def testSurrogatesInPython3(self):
+    # Surrogates like U+D83D is an invalid unicode character, it is
+    # supported by Python2 only because in some builds, unicode strings
+    # use 2-bytes code units. Since Python 3.3, we don't have this problem.
+    #
+    # Surrogates are utf16 code units, in a unicode string they are invalid
+    # characters even when they appear in pairs like u'\ud801\udc01'. Protobuf
+    # Python3 reject such cases at setters and parsers. Python2 accpect it
+    # to keep same features with the language itself. 'Unpaired pairs'
+    # like u'\ud801' are rejected at parsers when strict utf8 check is enabled
+    # in proto3 to keep same behavior with c extension.
+
+    # Surrogates are rejected at setters in Python3.
+    with self.assertRaises(ValueError):
+      unittest_proto3_arena_pb2.TestAllTypes(
+          optional_string=u'\ud801\udc01')
+    with self.assertRaises(ValueError):
+      unittest_proto3_arena_pb2.TestAllTypes(
+          optional_string=b'\xed\xa0\x81')
+    with self.assertRaises(ValueError):
+      unittest_proto3_arena_pb2.TestAllTypes(
+          optional_string=u'\ud801')
+    with self.assertRaises(ValueError):
+      unittest_proto3_arena_pb2.TestAllTypes(
+          optional_string=u'\ud801\ud801')
+
+  @unittest.skipIf(six.PY3 or sys.maxunicode == UCS2_MAXUNICODE,
+                   'Surrogates are rejected at setters in Python3')
+  def testSurrogatesInPython2(self):
+    # Test optional_string=u'\ud801\udc01'.
+    # surrogate pair is acceptable in python2.
+    msg = unittest_proto3_arena_pb2.TestAllTypes(
+        optional_string=u'\ud801\udc01')
+    # TODO(jieluo): Change pure python to have same behavior with c extension.
+    # Some build in python2 consider u'\ud801\udc01' and u'\U00010401' are
+    # equal, some are not equal.
+    if api_implementation.Type() == 'python':
+      self.assertEqual(msg.optional_string, u'\ud801\udc01')
+    else:
+      self.assertEqual(msg.optional_string, u'\U00010401')
+    serialized = msg.SerializeToString()
+    msg2 = unittest_proto3_arena_pb2.TestAllTypes()
+    msg2.MergeFromString(serialized)
+    self.assertEqual(msg2.optional_string, u'\U00010401')
+
+    # Python2 does not reject surrogates at setters.
+    msg = unittest_proto3_arena_pb2.TestAllTypes(
+        optional_string=b'\xed\xa0\x81')
+    unittest_proto3_arena_pb2.TestAllTypes(
+        optional_string=u'\ud801')
+    unittest_proto3_arena_pb2.TestAllTypes(
+        optional_string=u'\ud801\ud801')
+
+
+@testing_refleaks.TestCase
+class ValidTypeNamesTest(unittest.TestCase):
+
+  def assertImportFromName(self, msg, base_name):
+    # Parse <type 'module.class_name'> to extra 'some.name' as a string.
+    tp_name = str(type(msg)).split("'")[1]
+    valid_names = ('Repeated%sContainer' % base_name,
+                   'Repeated%sFieldContainer' % base_name)
+    self.assertTrue(any(tp_name.endswith(v) for v in valid_names),
+                    '%r does end with any of %r' % (tp_name, valid_names))
+
+    parts = tp_name.split('.')
+    class_name = parts[-1]
+    module_name = '.'.join(parts[:-1])
+    __import__(module_name, fromlist=[class_name])
+
+  def testTypeNamesCanBeImported(self):
+    # If import doesn't work, pickling won't work either.
+    pb = unittest_pb2.TestAllTypes()
+    self.assertImportFromName(pb.repeated_int32, 'Scalar')
+    self.assertImportFromName(pb.repeated_nested_message, 'Composite')
+
+@testing_refleaks.TestCase
+class PackedFieldTest(unittest.TestCase):
+
+  def setMessage(self, message):
+    message.repeated_int32.append(1)
+    message.repeated_int64.append(1)
+    message.repeated_uint32.append(1)
+    message.repeated_uint64.append(1)
+    message.repeated_sint32.append(1)
+    message.repeated_sint64.append(1)
+    message.repeated_fixed32.append(1)
+    message.repeated_fixed64.append(1)
+    message.repeated_sfixed32.append(1)
+    message.repeated_sfixed64.append(1)
+    message.repeated_float.append(1.0)
+    message.repeated_double.append(1.0)
+    message.repeated_bool.append(True)
+    message.repeated_nested_enum.append(1)
+
+  def testPackedFields(self):
+    message = packed_field_test_pb2.TestPackedTypes()
+    self.setMessage(message)
+    golden_data = (b'\x0A\x01\x01'
+                   b'\x12\x01\x01'
+                   b'\x1A\x01\x01'
+                   b'\x22\x01\x01'
+                   b'\x2A\x01\x02'
+                   b'\x32\x01\x02'
+                   b'\x3A\x04\x01\x00\x00\x00'
+                   b'\x42\x08\x01\x00\x00\x00\x00\x00\x00\x00'
+                   b'\x4A\x04\x01\x00\x00\x00'
+                   b'\x52\x08\x01\x00\x00\x00\x00\x00\x00\x00'
+                   b'\x5A\x04\x00\x00\x80\x3f'
+                   b'\x62\x08\x00\x00\x00\x00\x00\x00\xf0\x3f'
+                   b'\x6A\x01\x01'
+                   b'\x72\x01\x01')
+    self.assertEqual(golden_data, message.SerializeToString())
+
+  def testUnpackedFields(self):
+    message = packed_field_test_pb2.TestUnpackedTypes()
+    self.setMessage(message)
+    golden_data = (b'\x08\x01'
+                   b'\x10\x01'
+                   b'\x18\x01'
+                   b'\x20\x01'
+                   b'\x28\x02'
+                   b'\x30\x02'
+                   b'\x3D\x01\x00\x00\x00'
+                   b'\x41\x01\x00\x00\x00\x00\x00\x00\x00'
+                   b'\x4D\x01\x00\x00\x00'
+                   b'\x51\x01\x00\x00\x00\x00\x00\x00\x00'
+                   b'\x5D\x00\x00\x80\x3f'
+                   b'\x61\x00\x00\x00\x00\x00\x00\xf0\x3f'
+                   b'\x68\x01'
+                   b'\x70\x01')
+    self.assertEqual(golden_data, message.SerializeToString())
+
+
+@unittest.skipIf(api_implementation.Type() != 'cpp' or
+                 sys.version_info < (2, 7),
+                 'explicit tests of the C++ implementation for PY27 and above')
+@testing_refleaks.TestCase
+class OversizeProtosTest(unittest.TestCase):
+
+  @classmethod
+  def setUpClass(cls):
+    # At the moment, reference cycles between DescriptorPool and Message classes
+    # are not detected and these objects are never freed.
+    # To avoid errors with ReferenceLeakChecker, we create the class only once.
+    file_desc = """
+      name: "f/f.msg2"
+      package: "f"
+      message_type {
+        name: "msg1"
+        field {
+          name: "payload"
+          number: 1
+          label: LABEL_OPTIONAL
+          type: TYPE_STRING
+        }
+      }
+      message_type {
+        name: "msg2"
+        field {
+          name: "field"
+          number: 1
+          label: LABEL_OPTIONAL
+          type: TYPE_MESSAGE
+          type_name: "msg1"
+        }
+      }
+    """
+    pool = descriptor_pool.DescriptorPool()
+    desc = descriptor_pb2.FileDescriptorProto()
+    text_format.Parse(file_desc, desc)
+    pool.Add(desc)
+    cls.proto_cls = message_factory.MessageFactory(pool).GetPrototype(
+        pool.FindMessageTypeByName('f.msg2'))
+
+  def setUp(self):
+    self.p = self.proto_cls()
+    self.p.field.payload = 'c' * (1024 * 1024 * 64 + 1)
+    self.p_serialized = self.p.SerializeToString()
+
+  def testAssertOversizeProto(self):
+    from google.protobuf.pyext._message import SetAllowOversizeProtos
+    SetAllowOversizeProtos(False)
+    q = self.proto_cls()
+    try:
+      q.ParseFromString(self.p_serialized)
+    except message.DecodeError as e:
+      self.assertEqual(str(e), 'Error parsing message')
+
+  def testSucceedOversizeProto(self):
+    from google.protobuf.pyext._message import SetAllowOversizeProtos
+    SetAllowOversizeProtos(True)
+    q = self.proto_cls()
+    q.ParseFromString(self.p_serialized)
+    self.assertEqual(self.p.field.payload, q.field.payload)
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/missing_enum_values_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/missing_enum_values_pb2.py
new file mode 100644
index 0000000..3e9273e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/missing_enum_values_pb2.py
@@ -0,0 +1,235 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/missing_enum_values.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/missing_enum_values.proto',
+  package='google.protobuf.python.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n2google/protobuf/internal/missing_enum_values.proto\x12\x1fgoogle.protobuf.python.internal\"\xc1\x02\n\x0eTestEnumValues\x12X\n\x14optional_nested_enum\x18\x01 \x01(\x0e\x32:.google.protobuf.python.internal.TestEnumValues.NestedEnum\x12X\n\x14repeated_nested_enum\x18\x02 \x03(\x0e\x32:.google.protobuf.python.internal.TestEnumValues.NestedEnum\x12Z\n\x12packed_nested_enum\x18\x03 \x03(\x0e\x32:.google.protobuf.python.internal.TestEnumValues.NestedEnumB\x02\x10\x01\"\x1f\n\nNestedEnum\x12\x08\n\x04ZERO\x10\x00\x12\x07\n\x03ONE\x10\x01\"\xd3\x02\n\x15TestMissingEnumValues\x12_\n\x14optional_nested_enum\x18\x01 \x01(\x0e\x32\x41.google.protobuf.python.internal.TestMissingEnumValues.NestedEnum\x12_\n\x14repeated_nested_enum\x18\x02 \x03(\x0e\x32\x41.google.protobuf.python.internal.TestMissingEnumValues.NestedEnum\x12\x61\n\x12packed_nested_enum\x18\x03 \x03(\x0e\x32\x41.google.protobuf.python.internal.TestMissingEnumValues.NestedEnumB\x02\x10\x01\"\x15\n\nNestedEnum\x12\x07\n\x03TWO\x10\x02\"\x1b\n\nJustString\x12\r\n\x05\x64ummy\x18\x01 \x02(\t'
+)
+
+
+
+_TESTENUMVALUES_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.TestEnumValues.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='ZERO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ONE', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=378,
+  serialized_end=409,
+)
+_sym_db.RegisterEnumDescriptor(_TESTENUMVALUES_NESTEDENUM)
+
+_TESTMISSINGENUMVALUES_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.TestMissingEnumValues.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='TWO', index=0, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=730,
+  serialized_end=751,
+)
+_sym_db.RegisterEnumDescriptor(_TESTMISSINGENUMVALUES_NESTEDENUM)
+
+
+_TESTENUMVALUES = _descriptor.Descriptor(
+  name='TestEnumValues',
+  full_name='google.protobuf.python.internal.TestEnumValues',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_nested_enum', full_name='google.protobuf.python.internal.TestEnumValues.optional_nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_enum', full_name='google.protobuf.python.internal.TestEnumValues.repeated_nested_enum', index=1,
+      number=2, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_nested_enum', full_name='google.protobuf.python.internal.TestEnumValues.packed_nested_enum', index=2,
+      number=3, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _TESTENUMVALUES_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=88,
+  serialized_end=409,
+)
+
+
+_TESTMISSINGENUMVALUES = _descriptor.Descriptor(
+  name='TestMissingEnumValues',
+  full_name='google.protobuf.python.internal.TestMissingEnumValues',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_nested_enum', full_name='google.protobuf.python.internal.TestMissingEnumValues.optional_nested_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=2,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_enum', full_name='google.protobuf.python.internal.TestMissingEnumValues.repeated_nested_enum', index=1,
+      number=2, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_nested_enum', full_name='google.protobuf.python.internal.TestMissingEnumValues.packed_nested_enum', index=2,
+      number=3, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _TESTMISSINGENUMVALUES_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=412,
+  serialized_end=751,
+)
+
+
+_JUSTSTRING = _descriptor.Descriptor(
+  name='JustString',
+  full_name='google.protobuf.python.internal.JustString',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='dummy', full_name='google.protobuf.python.internal.JustString.dummy', index=0,
+      number=1, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=753,
+  serialized_end=780,
+)
+
+_TESTENUMVALUES.fields_by_name['optional_nested_enum'].enum_type = _TESTENUMVALUES_NESTEDENUM
+_TESTENUMVALUES.fields_by_name['repeated_nested_enum'].enum_type = _TESTENUMVALUES_NESTEDENUM
+_TESTENUMVALUES.fields_by_name['packed_nested_enum'].enum_type = _TESTENUMVALUES_NESTEDENUM
+_TESTENUMVALUES_NESTEDENUM.containing_type = _TESTENUMVALUES
+_TESTMISSINGENUMVALUES.fields_by_name['optional_nested_enum'].enum_type = _TESTMISSINGENUMVALUES_NESTEDENUM
+_TESTMISSINGENUMVALUES.fields_by_name['repeated_nested_enum'].enum_type = _TESTMISSINGENUMVALUES_NESTEDENUM
+_TESTMISSINGENUMVALUES.fields_by_name['packed_nested_enum'].enum_type = _TESTMISSINGENUMVALUES_NESTEDENUM
+_TESTMISSINGENUMVALUES_NESTEDENUM.containing_type = _TESTMISSINGENUMVALUES
+DESCRIPTOR.message_types_by_name['TestEnumValues'] = _TESTENUMVALUES
+DESCRIPTOR.message_types_by_name['TestMissingEnumValues'] = _TESTMISSINGENUMVALUES
+DESCRIPTOR.message_types_by_name['JustString'] = _JUSTSTRING
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestEnumValues = _reflection.GeneratedProtocolMessageType('TestEnumValues', (_message.Message,), {
+  'DESCRIPTOR' : _TESTENUMVALUES,
+  '__module__' : 'google.protobuf.internal.missing_enum_values_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.TestEnumValues)
+  })
+_sym_db.RegisterMessage(TestEnumValues)
+
+TestMissingEnumValues = _reflection.GeneratedProtocolMessageType('TestMissingEnumValues', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMISSINGENUMVALUES,
+  '__module__' : 'google.protobuf.internal.missing_enum_values_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.TestMissingEnumValues)
+  })
+_sym_db.RegisterMessage(TestMissingEnumValues)
+
+JustString = _reflection.GeneratedProtocolMessageType('JustString', (_message.Message,), {
+  'DESCRIPTOR' : _JUSTSTRING,
+  '__module__' : 'google.protobuf.internal.missing_enum_values_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.JustString)
+  })
+_sym_db.RegisterMessage(JustString)
+
+
+_TESTENUMVALUES.fields_by_name['packed_nested_enum']._options = None
+_TESTMISSINGENUMVALUES.fields_by_name['packed_nested_enum']._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/more_extensions_dynamic_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/more_extensions_dynamic_pb2.py
new file mode 100644
index 0000000..5488fbd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/more_extensions_dynamic_pb2.py
@@ -0,0 +1,104 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/more_extensions_dynamic.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf.internal import more_extensions_pb2 as google_dot_protobuf_dot_internal_dot_more__extensions__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/more_extensions_dynamic.proto',
+  package='google.protobuf.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n6google/protobuf/internal/more_extensions_dynamic.proto\x12\x18google.protobuf.internal\x1a.google/protobuf/internal/more_extensions.proto\"\x1f\n\x12\x44ynamicMessageType\x12\t\n\x01\x61\x18\x01 \x01(\x05:J\n\x17\x64ynamic_int32_extension\x12).google.protobuf.internal.ExtendedMessage\x18\x64 \x01(\x05:z\n\x19\x64ynamic_message_extension\x12).google.protobuf.internal.ExtendedMessage\x18\x65 \x01(\x0b\x32,.google.protobuf.internal.DynamicMessageType:\x83\x01\n\"repeated_dynamic_message_extension\x12).google.protobuf.internal.ExtendedMessage\x18\x66 \x03(\x0b\x32,.google.protobuf.internal.DynamicMessageType'
+  ,
+  dependencies=[google_dot_protobuf_dot_internal_dot_more__extensions__pb2.DESCRIPTOR,])
+
+
+DYNAMIC_INT32_EXTENSION_FIELD_NUMBER = 100
+dynamic_int32_extension = _descriptor.FieldDescriptor(
+  name='dynamic_int32_extension', full_name='google.protobuf.internal.dynamic_int32_extension', index=0,
+  number=100, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DYNAMIC_MESSAGE_EXTENSION_FIELD_NUMBER = 101
+dynamic_message_extension = _descriptor.FieldDescriptor(
+  name='dynamic_message_extension', full_name='google.protobuf.internal.dynamic_message_extension', index=1,
+  number=101, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_DYNAMIC_MESSAGE_EXTENSION_FIELD_NUMBER = 102
+repeated_dynamic_message_extension = _descriptor.FieldDescriptor(
+  name='repeated_dynamic_message_extension', full_name='google.protobuf.internal.repeated_dynamic_message_extension', index=2,
+  number=102, type=11, cpp_type=10, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+
+_DYNAMICMESSAGETYPE = _descriptor.Descriptor(
+  name='DynamicMessageType',
+  full_name='google.protobuf.internal.DynamicMessageType',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='google.protobuf.internal.DynamicMessageType.a', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=132,
+  serialized_end=163,
+)
+
+DESCRIPTOR.message_types_by_name['DynamicMessageType'] = _DYNAMICMESSAGETYPE
+DESCRIPTOR.extensions_by_name['dynamic_int32_extension'] = dynamic_int32_extension
+DESCRIPTOR.extensions_by_name['dynamic_message_extension'] = dynamic_message_extension
+DESCRIPTOR.extensions_by_name['repeated_dynamic_message_extension'] = repeated_dynamic_message_extension
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+DynamicMessageType = _reflection.GeneratedProtocolMessageType('DynamicMessageType', (_message.Message,), {
+  'DESCRIPTOR' : _DYNAMICMESSAGETYPE,
+  '__module__' : 'google.protobuf.internal.more_extensions_dynamic_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.DynamicMessageType)
+  })
+_sym_db.RegisterMessage(DynamicMessageType)
+
+google_dot_protobuf_dot_internal_dot_more__extensions__pb2.ExtendedMessage.RegisterExtension(dynamic_int32_extension)
+dynamic_message_extension.message_type = _DYNAMICMESSAGETYPE
+google_dot_protobuf_dot_internal_dot_more__extensions__pb2.ExtendedMessage.RegisterExtension(dynamic_message_extension)
+repeated_dynamic_message_extension.message_type = _DYNAMICMESSAGETYPE
+google_dot_protobuf_dot_internal_dot_more__extensions__pb2.ExtendedMessage.RegisterExtension(repeated_dynamic_message_extension)
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/more_extensions_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/more_extensions_pb2.py
new file mode 100644
index 0000000..a92915a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/more_extensions_pb2.py
@@ -0,0 +1,200 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/more_extensions.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/more_extensions.proto',
+  package='google.protobuf.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n.google/protobuf/internal/more_extensions.proto\x12\x18google.protobuf.internal\"P\n\x0fTopLevelMessage\x12=\n\nsubmessage\x18\x01 \x01(\x0b\x32).google.protobuf.internal.ExtendedMessage\"K\n\x0f\x45xtendedMessage\x12\x17\n\x0eoptional_int32\x18\xe9\x07 \x01(\x05\x12\x18\n\x0frepeated_string\x18\xea\x07 \x03(\t*\x05\x08\x01\x10\xe8\x07\"-\n\x0e\x46oreignMessage\x12\x1b\n\x13\x66oreign_message_int\x18\x01 \x01(\x05:I\n\x16optional_int_extension\x12).google.protobuf.internal.ExtendedMessage\x18\x01 \x01(\x05:w\n\x1aoptional_message_extension\x12).google.protobuf.internal.ExtendedMessage\x18\x02 \x01(\x0b\x32(.google.protobuf.internal.ForeignMessage:I\n\x16repeated_int_extension\x12).google.protobuf.internal.ExtendedMessage\x18\x03 \x03(\x05:w\n\x1arepeated_message_extension\x12).google.protobuf.internal.ExtendedMessage\x18\x04 \x03(\x0b\x32(.google.protobuf.internal.ForeignMessage'
+)
+
+
+OPTIONAL_INT_EXTENSION_FIELD_NUMBER = 1
+optional_int_extension = _descriptor.FieldDescriptor(
+  name='optional_int_extension', full_name='google.protobuf.internal.optional_int_extension', index=0,
+  number=1, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_MESSAGE_EXTENSION_FIELD_NUMBER = 2
+optional_message_extension = _descriptor.FieldDescriptor(
+  name='optional_message_extension', full_name='google.protobuf.internal.optional_message_extension', index=1,
+  number=2, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_INT_EXTENSION_FIELD_NUMBER = 3
+repeated_int_extension = _descriptor.FieldDescriptor(
+  name='repeated_int_extension', full_name='google.protobuf.internal.repeated_int_extension', index=2,
+  number=3, type=5, cpp_type=1, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_MESSAGE_EXTENSION_FIELD_NUMBER = 4
+repeated_message_extension = _descriptor.FieldDescriptor(
+  name='repeated_message_extension', full_name='google.protobuf.internal.repeated_message_extension', index=3,
+  number=4, type=11, cpp_type=10, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+
+_TOPLEVELMESSAGE = _descriptor.Descriptor(
+  name='TopLevelMessage',
+  full_name='google.protobuf.internal.TopLevelMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='submessage', full_name='google.protobuf.internal.TopLevelMessage.submessage', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=76,
+  serialized_end=156,
+)
+
+
+_EXTENDEDMESSAGE = _descriptor.Descriptor(
+  name='ExtendedMessage',
+  full_name='google.protobuf.internal.ExtendedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='google.protobuf.internal.ExtendedMessage.optional_int32', index=0,
+      number=1001, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string', full_name='google.protobuf.internal.ExtendedMessage.repeated_string', index=1,
+      number=1002, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1, 1000), ],
+  oneofs=[
+  ],
+  serialized_start=158,
+  serialized_end=233,
+)
+
+
+_FOREIGNMESSAGE = _descriptor.Descriptor(
+  name='ForeignMessage',
+  full_name='google.protobuf.internal.ForeignMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='foreign_message_int', full_name='google.protobuf.internal.ForeignMessage.foreign_message_int', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=235,
+  serialized_end=280,
+)
+
+_TOPLEVELMESSAGE.fields_by_name['submessage'].message_type = _EXTENDEDMESSAGE
+DESCRIPTOR.message_types_by_name['TopLevelMessage'] = _TOPLEVELMESSAGE
+DESCRIPTOR.message_types_by_name['ExtendedMessage'] = _EXTENDEDMESSAGE
+DESCRIPTOR.message_types_by_name['ForeignMessage'] = _FOREIGNMESSAGE
+DESCRIPTOR.extensions_by_name['optional_int_extension'] = optional_int_extension
+DESCRIPTOR.extensions_by_name['optional_message_extension'] = optional_message_extension
+DESCRIPTOR.extensions_by_name['repeated_int_extension'] = repeated_int_extension
+DESCRIPTOR.extensions_by_name['repeated_message_extension'] = repeated_message_extension
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TopLevelMessage = _reflection.GeneratedProtocolMessageType('TopLevelMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TOPLEVELMESSAGE,
+  '__module__' : 'google.protobuf.internal.more_extensions_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.TopLevelMessage)
+  })
+_sym_db.RegisterMessage(TopLevelMessage)
+
+ExtendedMessage = _reflection.GeneratedProtocolMessageType('ExtendedMessage', (_message.Message,), {
+  'DESCRIPTOR' : _EXTENDEDMESSAGE,
+  '__module__' : 'google.protobuf.internal.more_extensions_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.ExtendedMessage)
+  })
+_sym_db.RegisterMessage(ExtendedMessage)
+
+ForeignMessage = _reflection.GeneratedProtocolMessageType('ForeignMessage', (_message.Message,), {
+  'DESCRIPTOR' : _FOREIGNMESSAGE,
+  '__module__' : 'google.protobuf.internal.more_extensions_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.ForeignMessage)
+  })
+_sym_db.RegisterMessage(ForeignMessage)
+
+ExtendedMessage.RegisterExtension(optional_int_extension)
+optional_message_extension.message_type = _FOREIGNMESSAGE
+ExtendedMessage.RegisterExtension(optional_message_extension)
+ExtendedMessage.RegisterExtension(repeated_int_extension)
+repeated_message_extension.message_type = _FOREIGNMESSAGE
+ExtendedMessage.RegisterExtension(repeated_message_extension)
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/more_messages_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/more_messages_pb2.py
new file mode 100644
index 0000000..e924722
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/more_messages_pb2.py
@@ -0,0 +1,8871 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/more_messages.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/more_messages.proto',
+  package='google.protobuf.internal',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
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+)
+
+_IS = _descriptor.EnumDescriptor(
+  name='is',
+  full_name='google.protobuf.internal.is',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='default', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='else', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=2659,
+  serialized_end=2686,
+)
+_sym_db.RegisterEnumDescriptor(_IS)
+
+globals()['is'] = enum_type_wrapper.EnumTypeWrapper(_IS)
+default = 0
+globals()['else'] = 1
+
+OPTIONAL_UINT64_FIELD_NUMBER = 4
+optional_uint64 = _descriptor.FieldDescriptor(
+  name='optional_uint64', full_name='google.protobuf.internal.optional_uint64', index=0,
+  number=4, type=4, cpp_type=4, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_INT64_FIELD_NUMBER = 2
+optional_int64 = _descriptor.FieldDescriptor(
+  name='optional_int64', full_name='google.protobuf.internal.optional_int64', index=1,
+  number=2, type=3, cpp_type=2, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+CONTINUE_FIELD_NUMBER = 1001
+globals()['continue'] = _descriptor.FieldDescriptor(
+  name='continue', full_name='google.protobuf.internal.continue', index=2,
+  number=1001, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+WITH_FIELD_NUMBER = 1001
+globals()['with'] = _descriptor.FieldDescriptor(
+  name='with', full_name='google.protobuf.internal.with', index=3,
+  number=1001, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+_CLASS_FOR = _descriptor.EnumDescriptor(
+  name='for',
+  full_name='google.protobuf.internal.class.for',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='default', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='True', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=468,
+  serialized_end=496,
+)
+_sym_db.RegisterEnumDescriptor(_CLASS_FOR)
+
+
+_OUTOFORDERFIELDS = _descriptor.Descriptor(
+  name='OutOfOrderFields',
+  full_name='google.protobuf.internal.OutOfOrderFields',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_sint32', full_name='google.protobuf.internal.OutOfOrderFields.optional_sint32', index=0,
+      number=5, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint32', full_name='google.protobuf.internal.OutOfOrderFields.optional_uint32', index=1,
+      number=3, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='google.protobuf.internal.OutOfOrderFields.optional_int32', index=2,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(4, 5), (2, 3), ],
+  oneofs=[
+  ],
+  serialized_start=74,
+  serialized_end=178,
+)
+
+
+_CLASS_TRY = _descriptor.Descriptor(
+  name='try',
+  full_name='google.protobuf.internal.class.try',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field', full_name='google.protobuf.internal.class.try.field', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(999, 10000), ],
+  oneofs=[
+  ],
+  serialized_start=438,
+  serialized_end=466,
+)
+
+_CLASS = _descriptor.Descriptor(
+  name='class',
+  full_name='google.protobuf.internal.class',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='int_field', full_name='google.protobuf.internal.class.int_field', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='if', full_name='google.protobuf.internal.class.if', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='as', full_name='google.protobuf.internal.class.as', index=2,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='enum_field', full_name='google.protobuf.internal.class.enum_field', index=3,
+      number=4, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_enum_field', full_name='google.protobuf.internal.class.nested_enum_field', index=4,
+      number=5, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_message', full_name='google.protobuf.internal.class.nested_message', index=5,
+      number=6, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_CLASS_TRY, ],
+  enum_types=[
+    _CLASS_FOR,
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(999, 10000), ],
+  oneofs=[
+  ],
+  serialized_start=181,
+  serialized_end=504,
+)
+
+
+_EXTENDCLASS = _descriptor.Descriptor(
+  name='ExtendClass',
+  full_name='google.protobuf.internal.ExtendClass',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='return', full_name='google.protobuf.internal.ExtendClass.return', index=0,
+      number=1002, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=506,
+  serialized_end=569,
+)
+
+
+_TESTFULLKEYWORD = _descriptor.Descriptor(
+  name='TestFullKeyword',
+  full_name='google.protobuf.internal.TestFullKeyword',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field1', full_name='google.protobuf.internal.TestFullKeyword.field1', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field2', full_name='google.protobuf.internal.TestFullKeyword.field2', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=571,
+  serialized_end=697,
+)
+
+
+_LOTSNESTEDMESSAGE_B0 = _descriptor.Descriptor(
+  name='B0',
+  full_name='google.protobuf.internal.LotsNestedMessage.B0',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=721,
+  serialized_end=725,
+)
+
+_LOTSNESTEDMESSAGE_B1 = _descriptor.Descriptor(
+  name='B1',
+  full_name='google.protobuf.internal.LotsNestedMessage.B1',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=727,
+  serialized_end=731,
+)
+
+_LOTSNESTEDMESSAGE_B2 = _descriptor.Descriptor(
+  name='B2',
+  full_name='google.protobuf.internal.LotsNestedMessage.B2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=733,
+  serialized_end=737,
+)
+
+_LOTSNESTEDMESSAGE_B3 = _descriptor.Descriptor(
+  name='B3',
+  full_name='google.protobuf.internal.LotsNestedMessage.B3',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=739,
+  serialized_end=743,
+)
+
+_LOTSNESTEDMESSAGE_B4 = _descriptor.Descriptor(
+  name='B4',
+  full_name='google.protobuf.internal.LotsNestedMessage.B4',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=745,
+  serialized_end=749,
+)
+
+_LOTSNESTEDMESSAGE_B5 = _descriptor.Descriptor(
+  name='B5',
+  full_name='google.protobuf.internal.LotsNestedMessage.B5',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=751,
+  serialized_end=755,
+)
+
+_LOTSNESTEDMESSAGE_B6 = _descriptor.Descriptor(
+  name='B6',
+  full_name='google.protobuf.internal.LotsNestedMessage.B6',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=757,
+  serialized_end=761,
+)
+
+_LOTSNESTEDMESSAGE_B7 = _descriptor.Descriptor(
+  name='B7',
+  full_name='google.protobuf.internal.LotsNestedMessage.B7',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=763,
+  serialized_end=767,
+)
+
+_LOTSNESTEDMESSAGE_B8 = _descriptor.Descriptor(
+  name='B8',
+  full_name='google.protobuf.internal.LotsNestedMessage.B8',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=769,
+  serialized_end=773,
+)
+
+_LOTSNESTEDMESSAGE_B9 = _descriptor.Descriptor(
+  name='B9',
+  full_name='google.protobuf.internal.LotsNestedMessage.B9',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=775,
+  serialized_end=779,
+)
+
+_LOTSNESTEDMESSAGE_B10 = _descriptor.Descriptor(
+  name='B10',
+  full_name='google.protobuf.internal.LotsNestedMessage.B10',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=781,
+  serialized_end=786,
+)
+
+_LOTSNESTEDMESSAGE_B11 = _descriptor.Descriptor(
+  name='B11',
+  full_name='google.protobuf.internal.LotsNestedMessage.B11',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=788,
+  serialized_end=793,
+)
+
+_LOTSNESTEDMESSAGE_B12 = _descriptor.Descriptor(
+  name='B12',
+  full_name='google.protobuf.internal.LotsNestedMessage.B12',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=795,
+  serialized_end=800,
+)
+
+_LOTSNESTEDMESSAGE_B13 = _descriptor.Descriptor(
+  name='B13',
+  full_name='google.protobuf.internal.LotsNestedMessage.B13',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=802,
+  serialized_end=807,
+)
+
+_LOTSNESTEDMESSAGE_B14 = _descriptor.Descriptor(
+  name='B14',
+  full_name='google.protobuf.internal.LotsNestedMessage.B14',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=809,
+  serialized_end=814,
+)
+
+_LOTSNESTEDMESSAGE_B15 = _descriptor.Descriptor(
+  name='B15',
+  full_name='google.protobuf.internal.LotsNestedMessage.B15',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=816,
+  serialized_end=821,
+)
+
+_LOTSNESTEDMESSAGE_B16 = _descriptor.Descriptor(
+  name='B16',
+  full_name='google.protobuf.internal.LotsNestedMessage.B16',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=823,
+  serialized_end=828,
+)
+
+_LOTSNESTEDMESSAGE_B17 = _descriptor.Descriptor(
+  name='B17',
+  full_name='google.protobuf.internal.LotsNestedMessage.B17',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=830,
+  serialized_end=835,
+)
+
+_LOTSNESTEDMESSAGE_B18 = _descriptor.Descriptor(
+  name='B18',
+  full_name='google.protobuf.internal.LotsNestedMessage.B18',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=837,
+  serialized_end=842,
+)
+
+_LOTSNESTEDMESSAGE_B19 = _descriptor.Descriptor(
+  name='B19',
+  full_name='google.protobuf.internal.LotsNestedMessage.B19',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=844,
+  serialized_end=849,
+)
+
+_LOTSNESTEDMESSAGE_B20 = _descriptor.Descriptor(
+  name='B20',
+  full_name='google.protobuf.internal.LotsNestedMessage.B20',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=851,
+  serialized_end=856,
+)
+
+_LOTSNESTEDMESSAGE_B21 = _descriptor.Descriptor(
+  name='B21',
+  full_name='google.protobuf.internal.LotsNestedMessage.B21',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=858,
+  serialized_end=863,
+)
+
+_LOTSNESTEDMESSAGE_B22 = _descriptor.Descriptor(
+  name='B22',
+  full_name='google.protobuf.internal.LotsNestedMessage.B22',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=865,
+  serialized_end=870,
+)
+
+_LOTSNESTEDMESSAGE_B23 = _descriptor.Descriptor(
+  name='B23',
+  full_name='google.protobuf.internal.LotsNestedMessage.B23',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=872,
+  serialized_end=877,
+)
+
+_LOTSNESTEDMESSAGE_B24 = _descriptor.Descriptor(
+  name='B24',
+  full_name='google.protobuf.internal.LotsNestedMessage.B24',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=879,
+  serialized_end=884,
+)
+
+_LOTSNESTEDMESSAGE_B25 = _descriptor.Descriptor(
+  name='B25',
+  full_name='google.protobuf.internal.LotsNestedMessage.B25',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=886,
+  serialized_end=891,
+)
+
+_LOTSNESTEDMESSAGE_B26 = _descriptor.Descriptor(
+  name='B26',
+  full_name='google.protobuf.internal.LotsNestedMessage.B26',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=893,
+  serialized_end=898,
+)
+
+_LOTSNESTEDMESSAGE_B27 = _descriptor.Descriptor(
+  name='B27',
+  full_name='google.protobuf.internal.LotsNestedMessage.B27',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=900,
+  serialized_end=905,
+)
+
+_LOTSNESTEDMESSAGE_B28 = _descriptor.Descriptor(
+  name='B28',
+  full_name='google.protobuf.internal.LotsNestedMessage.B28',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=907,
+  serialized_end=912,
+)
+
+_LOTSNESTEDMESSAGE_B29 = _descriptor.Descriptor(
+  name='B29',
+  full_name='google.protobuf.internal.LotsNestedMessage.B29',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=914,
+  serialized_end=919,
+)
+
+_LOTSNESTEDMESSAGE_B30 = _descriptor.Descriptor(
+  name='B30',
+  full_name='google.protobuf.internal.LotsNestedMessage.B30',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=921,
+  serialized_end=926,
+)
+
+_LOTSNESTEDMESSAGE_B31 = _descriptor.Descriptor(
+  name='B31',
+  full_name='google.protobuf.internal.LotsNestedMessage.B31',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=928,
+  serialized_end=933,
+)
+
+_LOTSNESTEDMESSAGE_B32 = _descriptor.Descriptor(
+  name='B32',
+  full_name='google.protobuf.internal.LotsNestedMessage.B32',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=935,
+  serialized_end=940,
+)
+
+_LOTSNESTEDMESSAGE_B33 = _descriptor.Descriptor(
+  name='B33',
+  full_name='google.protobuf.internal.LotsNestedMessage.B33',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=942,
+  serialized_end=947,
+)
+
+_LOTSNESTEDMESSAGE_B34 = _descriptor.Descriptor(
+  name='B34',
+  full_name='google.protobuf.internal.LotsNestedMessage.B34',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=949,
+  serialized_end=954,
+)
+
+_LOTSNESTEDMESSAGE_B35 = _descriptor.Descriptor(
+  name='B35',
+  full_name='google.protobuf.internal.LotsNestedMessage.B35',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=956,
+  serialized_end=961,
+)
+
+_LOTSNESTEDMESSAGE_B36 = _descriptor.Descriptor(
+  name='B36',
+  full_name='google.protobuf.internal.LotsNestedMessage.B36',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=963,
+  serialized_end=968,
+)
+
+_LOTSNESTEDMESSAGE_B37 = _descriptor.Descriptor(
+  name='B37',
+  full_name='google.protobuf.internal.LotsNestedMessage.B37',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=970,
+  serialized_end=975,
+)
+
+_LOTSNESTEDMESSAGE_B38 = _descriptor.Descriptor(
+  name='B38',
+  full_name='google.protobuf.internal.LotsNestedMessage.B38',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=977,
+  serialized_end=982,
+)
+
+_LOTSNESTEDMESSAGE_B39 = _descriptor.Descriptor(
+  name='B39',
+  full_name='google.protobuf.internal.LotsNestedMessage.B39',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=984,
+  serialized_end=989,
+)
+
+_LOTSNESTEDMESSAGE_B40 = _descriptor.Descriptor(
+  name='B40',
+  full_name='google.protobuf.internal.LotsNestedMessage.B40',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=991,
+  serialized_end=996,
+)
+
+_LOTSNESTEDMESSAGE_B41 = _descriptor.Descriptor(
+  name='B41',
+  full_name='google.protobuf.internal.LotsNestedMessage.B41',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=998,
+  serialized_end=1003,
+)
+
+_LOTSNESTEDMESSAGE_B42 = _descriptor.Descriptor(
+  name='B42',
+  full_name='google.protobuf.internal.LotsNestedMessage.B42',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1005,
+  serialized_end=1010,
+)
+
+_LOTSNESTEDMESSAGE_B43 = _descriptor.Descriptor(
+  name='B43',
+  full_name='google.protobuf.internal.LotsNestedMessage.B43',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1012,
+  serialized_end=1017,
+)
+
+_LOTSNESTEDMESSAGE_B44 = _descriptor.Descriptor(
+  name='B44',
+  full_name='google.protobuf.internal.LotsNestedMessage.B44',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1019,
+  serialized_end=1024,
+)
+
+_LOTSNESTEDMESSAGE_B45 = _descriptor.Descriptor(
+  name='B45',
+  full_name='google.protobuf.internal.LotsNestedMessage.B45',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1026,
+  serialized_end=1031,
+)
+
+_LOTSNESTEDMESSAGE_B46 = _descriptor.Descriptor(
+  name='B46',
+  full_name='google.protobuf.internal.LotsNestedMessage.B46',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1033,
+  serialized_end=1038,
+)
+
+_LOTSNESTEDMESSAGE_B47 = _descriptor.Descriptor(
+  name='B47',
+  full_name='google.protobuf.internal.LotsNestedMessage.B47',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1040,
+  serialized_end=1045,
+)
+
+_LOTSNESTEDMESSAGE_B48 = _descriptor.Descriptor(
+  name='B48',
+  full_name='google.protobuf.internal.LotsNestedMessage.B48',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1047,
+  serialized_end=1052,
+)
+
+_LOTSNESTEDMESSAGE_B49 = _descriptor.Descriptor(
+  name='B49',
+  full_name='google.protobuf.internal.LotsNestedMessage.B49',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1054,
+  serialized_end=1059,
+)
+
+_LOTSNESTEDMESSAGE_B50 = _descriptor.Descriptor(
+  name='B50',
+  full_name='google.protobuf.internal.LotsNestedMessage.B50',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1061,
+  serialized_end=1066,
+)
+
+_LOTSNESTEDMESSAGE_B51 = _descriptor.Descriptor(
+  name='B51',
+  full_name='google.protobuf.internal.LotsNestedMessage.B51',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1068,
+  serialized_end=1073,
+)
+
+_LOTSNESTEDMESSAGE_B52 = _descriptor.Descriptor(
+  name='B52',
+  full_name='google.protobuf.internal.LotsNestedMessage.B52',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1075,
+  serialized_end=1080,
+)
+
+_LOTSNESTEDMESSAGE_B53 = _descriptor.Descriptor(
+  name='B53',
+  full_name='google.protobuf.internal.LotsNestedMessage.B53',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1082,
+  serialized_end=1087,
+)
+
+_LOTSNESTEDMESSAGE_B54 = _descriptor.Descriptor(
+  name='B54',
+  full_name='google.protobuf.internal.LotsNestedMessage.B54',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1089,
+  serialized_end=1094,
+)
+
+_LOTSNESTEDMESSAGE_B55 = _descriptor.Descriptor(
+  name='B55',
+  full_name='google.protobuf.internal.LotsNestedMessage.B55',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1096,
+  serialized_end=1101,
+)
+
+_LOTSNESTEDMESSAGE_B56 = _descriptor.Descriptor(
+  name='B56',
+  full_name='google.protobuf.internal.LotsNestedMessage.B56',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1103,
+  serialized_end=1108,
+)
+
+_LOTSNESTEDMESSAGE_B57 = _descriptor.Descriptor(
+  name='B57',
+  full_name='google.protobuf.internal.LotsNestedMessage.B57',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1110,
+  serialized_end=1115,
+)
+
+_LOTSNESTEDMESSAGE_B58 = _descriptor.Descriptor(
+  name='B58',
+  full_name='google.protobuf.internal.LotsNestedMessage.B58',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1117,
+  serialized_end=1122,
+)
+
+_LOTSNESTEDMESSAGE_B59 = _descriptor.Descriptor(
+  name='B59',
+  full_name='google.protobuf.internal.LotsNestedMessage.B59',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1124,
+  serialized_end=1129,
+)
+
+_LOTSNESTEDMESSAGE_B60 = _descriptor.Descriptor(
+  name='B60',
+  full_name='google.protobuf.internal.LotsNestedMessage.B60',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1131,
+  serialized_end=1136,
+)
+
+_LOTSNESTEDMESSAGE_B61 = _descriptor.Descriptor(
+  name='B61',
+  full_name='google.protobuf.internal.LotsNestedMessage.B61',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1138,
+  serialized_end=1143,
+)
+
+_LOTSNESTEDMESSAGE_B62 = _descriptor.Descriptor(
+  name='B62',
+  full_name='google.protobuf.internal.LotsNestedMessage.B62',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1145,
+  serialized_end=1150,
+)
+
+_LOTSNESTEDMESSAGE_B63 = _descriptor.Descriptor(
+  name='B63',
+  full_name='google.protobuf.internal.LotsNestedMessage.B63',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1152,
+  serialized_end=1157,
+)
+
+_LOTSNESTEDMESSAGE_B64 = _descriptor.Descriptor(
+  name='B64',
+  full_name='google.protobuf.internal.LotsNestedMessage.B64',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1159,
+  serialized_end=1164,
+)
+
+_LOTSNESTEDMESSAGE_B65 = _descriptor.Descriptor(
+  name='B65',
+  full_name='google.protobuf.internal.LotsNestedMessage.B65',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1166,
+  serialized_end=1171,
+)
+
+_LOTSNESTEDMESSAGE_B66 = _descriptor.Descriptor(
+  name='B66',
+  full_name='google.protobuf.internal.LotsNestedMessage.B66',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1173,
+  serialized_end=1178,
+)
+
+_LOTSNESTEDMESSAGE_B67 = _descriptor.Descriptor(
+  name='B67',
+  full_name='google.protobuf.internal.LotsNestedMessage.B67',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1180,
+  serialized_end=1185,
+)
+
+_LOTSNESTEDMESSAGE_B68 = _descriptor.Descriptor(
+  name='B68',
+  full_name='google.protobuf.internal.LotsNestedMessage.B68',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1187,
+  serialized_end=1192,
+)
+
+_LOTSNESTEDMESSAGE_B69 = _descriptor.Descriptor(
+  name='B69',
+  full_name='google.protobuf.internal.LotsNestedMessage.B69',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1194,
+  serialized_end=1199,
+)
+
+_LOTSNESTEDMESSAGE_B70 = _descriptor.Descriptor(
+  name='B70',
+  full_name='google.protobuf.internal.LotsNestedMessage.B70',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1201,
+  serialized_end=1206,
+)
+
+_LOTSNESTEDMESSAGE_B71 = _descriptor.Descriptor(
+  name='B71',
+  full_name='google.protobuf.internal.LotsNestedMessage.B71',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1208,
+  serialized_end=1213,
+)
+
+_LOTSNESTEDMESSAGE_B72 = _descriptor.Descriptor(
+  name='B72',
+  full_name='google.protobuf.internal.LotsNestedMessage.B72',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1215,
+  serialized_end=1220,
+)
+
+_LOTSNESTEDMESSAGE_B73 = _descriptor.Descriptor(
+  name='B73',
+  full_name='google.protobuf.internal.LotsNestedMessage.B73',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1222,
+  serialized_end=1227,
+)
+
+_LOTSNESTEDMESSAGE_B74 = _descriptor.Descriptor(
+  name='B74',
+  full_name='google.protobuf.internal.LotsNestedMessage.B74',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1229,
+  serialized_end=1234,
+)
+
+_LOTSNESTEDMESSAGE_B75 = _descriptor.Descriptor(
+  name='B75',
+  full_name='google.protobuf.internal.LotsNestedMessage.B75',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1236,
+  serialized_end=1241,
+)
+
+_LOTSNESTEDMESSAGE_B76 = _descriptor.Descriptor(
+  name='B76',
+  full_name='google.protobuf.internal.LotsNestedMessage.B76',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1243,
+  serialized_end=1248,
+)
+
+_LOTSNESTEDMESSAGE_B77 = _descriptor.Descriptor(
+  name='B77',
+  full_name='google.protobuf.internal.LotsNestedMessage.B77',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1250,
+  serialized_end=1255,
+)
+
+_LOTSNESTEDMESSAGE_B78 = _descriptor.Descriptor(
+  name='B78',
+  full_name='google.protobuf.internal.LotsNestedMessage.B78',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1257,
+  serialized_end=1262,
+)
+
+_LOTSNESTEDMESSAGE_B79 = _descriptor.Descriptor(
+  name='B79',
+  full_name='google.protobuf.internal.LotsNestedMessage.B79',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1264,
+  serialized_end=1269,
+)
+
+_LOTSNESTEDMESSAGE_B80 = _descriptor.Descriptor(
+  name='B80',
+  full_name='google.protobuf.internal.LotsNestedMessage.B80',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1271,
+  serialized_end=1276,
+)
+
+_LOTSNESTEDMESSAGE_B81 = _descriptor.Descriptor(
+  name='B81',
+  full_name='google.protobuf.internal.LotsNestedMessage.B81',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1278,
+  serialized_end=1283,
+)
+
+_LOTSNESTEDMESSAGE_B82 = _descriptor.Descriptor(
+  name='B82',
+  full_name='google.protobuf.internal.LotsNestedMessage.B82',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1285,
+  serialized_end=1290,
+)
+
+_LOTSNESTEDMESSAGE_B83 = _descriptor.Descriptor(
+  name='B83',
+  full_name='google.protobuf.internal.LotsNestedMessage.B83',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1292,
+  serialized_end=1297,
+)
+
+_LOTSNESTEDMESSAGE_B84 = _descriptor.Descriptor(
+  name='B84',
+  full_name='google.protobuf.internal.LotsNestedMessage.B84',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1299,
+  serialized_end=1304,
+)
+
+_LOTSNESTEDMESSAGE_B85 = _descriptor.Descriptor(
+  name='B85',
+  full_name='google.protobuf.internal.LotsNestedMessage.B85',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1306,
+  serialized_end=1311,
+)
+
+_LOTSNESTEDMESSAGE_B86 = _descriptor.Descriptor(
+  name='B86',
+  full_name='google.protobuf.internal.LotsNestedMessage.B86',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1313,
+  serialized_end=1318,
+)
+
+_LOTSNESTEDMESSAGE_B87 = _descriptor.Descriptor(
+  name='B87',
+  full_name='google.protobuf.internal.LotsNestedMessage.B87',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1320,
+  serialized_end=1325,
+)
+
+_LOTSNESTEDMESSAGE_B88 = _descriptor.Descriptor(
+  name='B88',
+  full_name='google.protobuf.internal.LotsNestedMessage.B88',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1327,
+  serialized_end=1332,
+)
+
+_LOTSNESTEDMESSAGE_B89 = _descriptor.Descriptor(
+  name='B89',
+  full_name='google.protobuf.internal.LotsNestedMessage.B89',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1334,
+  serialized_end=1339,
+)
+
+_LOTSNESTEDMESSAGE_B90 = _descriptor.Descriptor(
+  name='B90',
+  full_name='google.protobuf.internal.LotsNestedMessage.B90',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1341,
+  serialized_end=1346,
+)
+
+_LOTSNESTEDMESSAGE_B91 = _descriptor.Descriptor(
+  name='B91',
+  full_name='google.protobuf.internal.LotsNestedMessage.B91',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1348,
+  serialized_end=1353,
+)
+
+_LOTSNESTEDMESSAGE_B92 = _descriptor.Descriptor(
+  name='B92',
+  full_name='google.protobuf.internal.LotsNestedMessage.B92',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1355,
+  serialized_end=1360,
+)
+
+_LOTSNESTEDMESSAGE_B93 = _descriptor.Descriptor(
+  name='B93',
+  full_name='google.protobuf.internal.LotsNestedMessage.B93',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1362,
+  serialized_end=1367,
+)
+
+_LOTSNESTEDMESSAGE_B94 = _descriptor.Descriptor(
+  name='B94',
+  full_name='google.protobuf.internal.LotsNestedMessage.B94',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1369,
+  serialized_end=1374,
+)
+
+_LOTSNESTEDMESSAGE_B95 = _descriptor.Descriptor(
+  name='B95',
+  full_name='google.protobuf.internal.LotsNestedMessage.B95',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1376,
+  serialized_end=1381,
+)
+
+_LOTSNESTEDMESSAGE_B96 = _descriptor.Descriptor(
+  name='B96',
+  full_name='google.protobuf.internal.LotsNestedMessage.B96',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
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+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_end=1388,
+)
+
+_LOTSNESTEDMESSAGE_B97 = _descriptor.Descriptor(
+  name='B97',
+  full_name='google.protobuf.internal.LotsNestedMessage.B97',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1390,
+  serialized_end=1395,
+)
+
+_LOTSNESTEDMESSAGE_B98 = _descriptor.Descriptor(
+  name='B98',
+  full_name='google.protobuf.internal.LotsNestedMessage.B98',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1397,
+  serialized_end=1402,
+)
+
+_LOTSNESTEDMESSAGE_B99 = _descriptor.Descriptor(
+  name='B99',
+  full_name='google.protobuf.internal.LotsNestedMessage.B99',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1404,
+  serialized_end=1409,
+)
+
+_LOTSNESTEDMESSAGE_B100 = _descriptor.Descriptor(
+  name='B100',
+  full_name='google.protobuf.internal.LotsNestedMessage.B100',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1411,
+  serialized_end=1417,
+)
+
+_LOTSNESTEDMESSAGE_B101 = _descriptor.Descriptor(
+  name='B101',
+  full_name='google.protobuf.internal.LotsNestedMessage.B101',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1419,
+  serialized_end=1425,
+)
+
+_LOTSNESTEDMESSAGE_B102 = _descriptor.Descriptor(
+  name='B102',
+  full_name='google.protobuf.internal.LotsNestedMessage.B102',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1427,
+  serialized_end=1433,
+)
+
+_LOTSNESTEDMESSAGE_B103 = _descriptor.Descriptor(
+  name='B103',
+  full_name='google.protobuf.internal.LotsNestedMessage.B103',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1435,
+  serialized_end=1441,
+)
+
+_LOTSNESTEDMESSAGE_B104 = _descriptor.Descriptor(
+  name='B104',
+  full_name='google.protobuf.internal.LotsNestedMessage.B104',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1443,
+  serialized_end=1449,
+)
+
+_LOTSNESTEDMESSAGE_B105 = _descriptor.Descriptor(
+  name='B105',
+  full_name='google.protobuf.internal.LotsNestedMessage.B105',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1451,
+  serialized_end=1457,
+)
+
+_LOTSNESTEDMESSAGE_B106 = _descriptor.Descriptor(
+  name='B106',
+  full_name='google.protobuf.internal.LotsNestedMessage.B106',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1459,
+  serialized_end=1465,
+)
+
+_LOTSNESTEDMESSAGE_B107 = _descriptor.Descriptor(
+  name='B107',
+  full_name='google.protobuf.internal.LotsNestedMessage.B107',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1467,
+  serialized_end=1473,
+)
+
+_LOTSNESTEDMESSAGE_B108 = _descriptor.Descriptor(
+  name='B108',
+  full_name='google.protobuf.internal.LotsNestedMessage.B108',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1475,
+  serialized_end=1481,
+)
+
+_LOTSNESTEDMESSAGE_B109 = _descriptor.Descriptor(
+  name='B109',
+  full_name='google.protobuf.internal.LotsNestedMessage.B109',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1483,
+  serialized_end=1489,
+)
+
+_LOTSNESTEDMESSAGE_B110 = _descriptor.Descriptor(
+  name='B110',
+  full_name='google.protobuf.internal.LotsNestedMessage.B110',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1491,
+  serialized_end=1497,
+)
+
+_LOTSNESTEDMESSAGE_B111 = _descriptor.Descriptor(
+  name='B111',
+  full_name='google.protobuf.internal.LotsNestedMessage.B111',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1499,
+  serialized_end=1505,
+)
+
+_LOTSNESTEDMESSAGE_B112 = _descriptor.Descriptor(
+  name='B112',
+  full_name='google.protobuf.internal.LotsNestedMessage.B112',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1507,
+  serialized_end=1513,
+)
+
+_LOTSNESTEDMESSAGE_B113 = _descriptor.Descriptor(
+  name='B113',
+  full_name='google.protobuf.internal.LotsNestedMessage.B113',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1515,
+  serialized_end=1521,
+)
+
+_LOTSNESTEDMESSAGE_B114 = _descriptor.Descriptor(
+  name='B114',
+  full_name='google.protobuf.internal.LotsNestedMessage.B114',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1523,
+  serialized_end=1529,
+)
+
+_LOTSNESTEDMESSAGE_B115 = _descriptor.Descriptor(
+  name='B115',
+  full_name='google.protobuf.internal.LotsNestedMessage.B115',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1531,
+  serialized_end=1537,
+)
+
+_LOTSNESTEDMESSAGE_B116 = _descriptor.Descriptor(
+  name='B116',
+  full_name='google.protobuf.internal.LotsNestedMessage.B116',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1539,
+  serialized_end=1545,
+)
+
+_LOTSNESTEDMESSAGE_B117 = _descriptor.Descriptor(
+  name='B117',
+  full_name='google.protobuf.internal.LotsNestedMessage.B117',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1547,
+  serialized_end=1553,
+)
+
+_LOTSNESTEDMESSAGE_B118 = _descriptor.Descriptor(
+  name='B118',
+  full_name='google.protobuf.internal.LotsNestedMessage.B118',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1555,
+  serialized_end=1561,
+)
+
+_LOTSNESTEDMESSAGE_B119 = _descriptor.Descriptor(
+  name='B119',
+  full_name='google.protobuf.internal.LotsNestedMessage.B119',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1563,
+  serialized_end=1569,
+)
+
+_LOTSNESTEDMESSAGE_B120 = _descriptor.Descriptor(
+  name='B120',
+  full_name='google.protobuf.internal.LotsNestedMessage.B120',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1571,
+  serialized_end=1577,
+)
+
+_LOTSNESTEDMESSAGE_B121 = _descriptor.Descriptor(
+  name='B121',
+  full_name='google.protobuf.internal.LotsNestedMessage.B121',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1579,
+  serialized_end=1585,
+)
+
+_LOTSNESTEDMESSAGE_B122 = _descriptor.Descriptor(
+  name='B122',
+  full_name='google.protobuf.internal.LotsNestedMessage.B122',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1587,
+  serialized_end=1593,
+)
+
+_LOTSNESTEDMESSAGE_B123 = _descriptor.Descriptor(
+  name='B123',
+  full_name='google.protobuf.internal.LotsNestedMessage.B123',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1595,
+  serialized_end=1601,
+)
+
+_LOTSNESTEDMESSAGE_B124 = _descriptor.Descriptor(
+  name='B124',
+  full_name='google.protobuf.internal.LotsNestedMessage.B124',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1603,
+  serialized_end=1609,
+)
+
+_LOTSNESTEDMESSAGE_B125 = _descriptor.Descriptor(
+  name='B125',
+  full_name='google.protobuf.internal.LotsNestedMessage.B125',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1611,
+  serialized_end=1617,
+)
+
+_LOTSNESTEDMESSAGE_B126 = _descriptor.Descriptor(
+  name='B126',
+  full_name='google.protobuf.internal.LotsNestedMessage.B126',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1619,
+  serialized_end=1625,
+)
+
+_LOTSNESTEDMESSAGE_B127 = _descriptor.Descriptor(
+  name='B127',
+  full_name='google.protobuf.internal.LotsNestedMessage.B127',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1627,
+  serialized_end=1633,
+)
+
+_LOTSNESTEDMESSAGE_B128 = _descriptor.Descriptor(
+  name='B128',
+  full_name='google.protobuf.internal.LotsNestedMessage.B128',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1635,
+  serialized_end=1641,
+)
+
+_LOTSNESTEDMESSAGE_B129 = _descriptor.Descriptor(
+  name='B129',
+  full_name='google.protobuf.internal.LotsNestedMessage.B129',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1643,
+  serialized_end=1649,
+)
+
+_LOTSNESTEDMESSAGE_B130 = _descriptor.Descriptor(
+  name='B130',
+  full_name='google.protobuf.internal.LotsNestedMessage.B130',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1651,
+  serialized_end=1657,
+)
+
+_LOTSNESTEDMESSAGE_B131 = _descriptor.Descriptor(
+  name='B131',
+  full_name='google.protobuf.internal.LotsNestedMessage.B131',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1659,
+  serialized_end=1665,
+)
+
+_LOTSNESTEDMESSAGE_B132 = _descriptor.Descriptor(
+  name='B132',
+  full_name='google.protobuf.internal.LotsNestedMessage.B132',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1667,
+  serialized_end=1673,
+)
+
+_LOTSNESTEDMESSAGE_B133 = _descriptor.Descriptor(
+  name='B133',
+  full_name='google.protobuf.internal.LotsNestedMessage.B133',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1675,
+  serialized_end=1681,
+)
+
+_LOTSNESTEDMESSAGE_B134 = _descriptor.Descriptor(
+  name='B134',
+  full_name='google.protobuf.internal.LotsNestedMessage.B134',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1683,
+  serialized_end=1689,
+)
+
+_LOTSNESTEDMESSAGE_B135 = _descriptor.Descriptor(
+  name='B135',
+  full_name='google.protobuf.internal.LotsNestedMessage.B135',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1691,
+  serialized_end=1697,
+)
+
+_LOTSNESTEDMESSAGE_B136 = _descriptor.Descriptor(
+  name='B136',
+  full_name='google.protobuf.internal.LotsNestedMessage.B136',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1699,
+  serialized_end=1705,
+)
+
+_LOTSNESTEDMESSAGE_B137 = _descriptor.Descriptor(
+  name='B137',
+  full_name='google.protobuf.internal.LotsNestedMessage.B137',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1707,
+  serialized_end=1713,
+)
+
+_LOTSNESTEDMESSAGE_B138 = _descriptor.Descriptor(
+  name='B138',
+  full_name='google.protobuf.internal.LotsNestedMessage.B138',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1715,
+  serialized_end=1721,
+)
+
+_LOTSNESTEDMESSAGE_B139 = _descriptor.Descriptor(
+  name='B139',
+  full_name='google.protobuf.internal.LotsNestedMessage.B139',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1723,
+  serialized_end=1729,
+)
+
+_LOTSNESTEDMESSAGE_B140 = _descriptor.Descriptor(
+  name='B140',
+  full_name='google.protobuf.internal.LotsNestedMessage.B140',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1731,
+  serialized_end=1737,
+)
+
+_LOTSNESTEDMESSAGE_B141 = _descriptor.Descriptor(
+  name='B141',
+  full_name='google.protobuf.internal.LotsNestedMessage.B141',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1739,
+  serialized_end=1745,
+)
+
+_LOTSNESTEDMESSAGE_B142 = _descriptor.Descriptor(
+  name='B142',
+  full_name='google.protobuf.internal.LotsNestedMessage.B142',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1747,
+  serialized_end=1753,
+)
+
+_LOTSNESTEDMESSAGE_B143 = _descriptor.Descriptor(
+  name='B143',
+  full_name='google.protobuf.internal.LotsNestedMessage.B143',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1755,
+  serialized_end=1761,
+)
+
+_LOTSNESTEDMESSAGE_B144 = _descriptor.Descriptor(
+  name='B144',
+  full_name='google.protobuf.internal.LotsNestedMessage.B144',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1763,
+  serialized_end=1769,
+)
+
+_LOTSNESTEDMESSAGE_B145 = _descriptor.Descriptor(
+  name='B145',
+  full_name='google.protobuf.internal.LotsNestedMessage.B145',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1771,
+  serialized_end=1777,
+)
+
+_LOTSNESTEDMESSAGE_B146 = _descriptor.Descriptor(
+  name='B146',
+  full_name='google.protobuf.internal.LotsNestedMessage.B146',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1779,
+  serialized_end=1785,
+)
+
+_LOTSNESTEDMESSAGE_B147 = _descriptor.Descriptor(
+  name='B147',
+  full_name='google.protobuf.internal.LotsNestedMessage.B147',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1787,
+  serialized_end=1793,
+)
+
+_LOTSNESTEDMESSAGE_B148 = _descriptor.Descriptor(
+  name='B148',
+  full_name='google.protobuf.internal.LotsNestedMessage.B148',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1795,
+  serialized_end=1801,
+)
+
+_LOTSNESTEDMESSAGE_B149 = _descriptor.Descriptor(
+  name='B149',
+  full_name='google.protobuf.internal.LotsNestedMessage.B149',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1803,
+  serialized_end=1809,
+)
+
+_LOTSNESTEDMESSAGE_B150 = _descriptor.Descriptor(
+  name='B150',
+  full_name='google.protobuf.internal.LotsNestedMessage.B150',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1811,
+  serialized_end=1817,
+)
+
+_LOTSNESTEDMESSAGE_B151 = _descriptor.Descriptor(
+  name='B151',
+  full_name='google.protobuf.internal.LotsNestedMessage.B151',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1819,
+  serialized_end=1825,
+)
+
+_LOTSNESTEDMESSAGE_B152 = _descriptor.Descriptor(
+  name='B152',
+  full_name='google.protobuf.internal.LotsNestedMessage.B152',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1827,
+  serialized_end=1833,
+)
+
+_LOTSNESTEDMESSAGE_B153 = _descriptor.Descriptor(
+  name='B153',
+  full_name='google.protobuf.internal.LotsNestedMessage.B153',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1835,
+  serialized_end=1841,
+)
+
+_LOTSNESTEDMESSAGE_B154 = _descriptor.Descriptor(
+  name='B154',
+  full_name='google.protobuf.internal.LotsNestedMessage.B154',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1843,
+  serialized_end=1849,
+)
+
+_LOTSNESTEDMESSAGE_B155 = _descriptor.Descriptor(
+  name='B155',
+  full_name='google.protobuf.internal.LotsNestedMessage.B155',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1851,
+  serialized_end=1857,
+)
+
+_LOTSNESTEDMESSAGE_B156 = _descriptor.Descriptor(
+  name='B156',
+  full_name='google.protobuf.internal.LotsNestedMessage.B156',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1859,
+  serialized_end=1865,
+)
+
+_LOTSNESTEDMESSAGE_B157 = _descriptor.Descriptor(
+  name='B157',
+  full_name='google.protobuf.internal.LotsNestedMessage.B157',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1867,
+  serialized_end=1873,
+)
+
+_LOTSNESTEDMESSAGE_B158 = _descriptor.Descriptor(
+  name='B158',
+  full_name='google.protobuf.internal.LotsNestedMessage.B158',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1875,
+  serialized_end=1881,
+)
+
+_LOTSNESTEDMESSAGE_B159 = _descriptor.Descriptor(
+  name='B159',
+  full_name='google.protobuf.internal.LotsNestedMessage.B159',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1883,
+  serialized_end=1889,
+)
+
+_LOTSNESTEDMESSAGE_B160 = _descriptor.Descriptor(
+  name='B160',
+  full_name='google.protobuf.internal.LotsNestedMessage.B160',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1891,
+  serialized_end=1897,
+)
+
+_LOTSNESTEDMESSAGE_B161 = _descriptor.Descriptor(
+  name='B161',
+  full_name='google.protobuf.internal.LotsNestedMessage.B161',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1899,
+  serialized_end=1905,
+)
+
+_LOTSNESTEDMESSAGE_B162 = _descriptor.Descriptor(
+  name='B162',
+  full_name='google.protobuf.internal.LotsNestedMessage.B162',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1907,
+  serialized_end=1913,
+)
+
+_LOTSNESTEDMESSAGE_B163 = _descriptor.Descriptor(
+  name='B163',
+  full_name='google.protobuf.internal.LotsNestedMessage.B163',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1915,
+  serialized_end=1921,
+)
+
+_LOTSNESTEDMESSAGE_B164 = _descriptor.Descriptor(
+  name='B164',
+  full_name='google.protobuf.internal.LotsNestedMessage.B164',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1923,
+  serialized_end=1929,
+)
+
+_LOTSNESTEDMESSAGE_B165 = _descriptor.Descriptor(
+  name='B165',
+  full_name='google.protobuf.internal.LotsNestedMessage.B165',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1931,
+  serialized_end=1937,
+)
+
+_LOTSNESTEDMESSAGE_B166 = _descriptor.Descriptor(
+  name='B166',
+  full_name='google.protobuf.internal.LotsNestedMessage.B166',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1939,
+  serialized_end=1945,
+)
+
+_LOTSNESTEDMESSAGE_B167 = _descriptor.Descriptor(
+  name='B167',
+  full_name='google.protobuf.internal.LotsNestedMessage.B167',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1947,
+  serialized_end=1953,
+)
+
+_LOTSNESTEDMESSAGE_B168 = _descriptor.Descriptor(
+  name='B168',
+  full_name='google.protobuf.internal.LotsNestedMessage.B168',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1955,
+  serialized_end=1961,
+)
+
+_LOTSNESTEDMESSAGE_B169 = _descriptor.Descriptor(
+  name='B169',
+  full_name='google.protobuf.internal.LotsNestedMessage.B169',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
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+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=1963,
+  serialized_end=1969,
+)
+
+_LOTSNESTEDMESSAGE_B170 = _descriptor.Descriptor(
+  name='B170',
+  full_name='google.protobuf.internal.LotsNestedMessage.B170',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1971,
+  serialized_end=1977,
+)
+
+_LOTSNESTEDMESSAGE_B171 = _descriptor.Descriptor(
+  name='B171',
+  full_name='google.protobuf.internal.LotsNestedMessage.B171',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1979,
+  serialized_end=1985,
+)
+
+_LOTSNESTEDMESSAGE_B172 = _descriptor.Descriptor(
+  name='B172',
+  full_name='google.protobuf.internal.LotsNestedMessage.B172',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1987,
+  serialized_end=1993,
+)
+
+_LOTSNESTEDMESSAGE_B173 = _descriptor.Descriptor(
+  name='B173',
+  full_name='google.protobuf.internal.LotsNestedMessage.B173',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1995,
+  serialized_end=2001,
+)
+
+_LOTSNESTEDMESSAGE_B174 = _descriptor.Descriptor(
+  name='B174',
+  full_name='google.protobuf.internal.LotsNestedMessage.B174',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2003,
+  serialized_end=2009,
+)
+
+_LOTSNESTEDMESSAGE_B175 = _descriptor.Descriptor(
+  name='B175',
+  full_name='google.protobuf.internal.LotsNestedMessage.B175',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2011,
+  serialized_end=2017,
+)
+
+_LOTSNESTEDMESSAGE_B176 = _descriptor.Descriptor(
+  name='B176',
+  full_name='google.protobuf.internal.LotsNestedMessage.B176',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2019,
+  serialized_end=2025,
+)
+
+_LOTSNESTEDMESSAGE_B177 = _descriptor.Descriptor(
+  name='B177',
+  full_name='google.protobuf.internal.LotsNestedMessage.B177',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2027,
+  serialized_end=2033,
+)
+
+_LOTSNESTEDMESSAGE_B178 = _descriptor.Descriptor(
+  name='B178',
+  full_name='google.protobuf.internal.LotsNestedMessage.B178',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2035,
+  serialized_end=2041,
+)
+
+_LOTSNESTEDMESSAGE_B179 = _descriptor.Descriptor(
+  name='B179',
+  full_name='google.protobuf.internal.LotsNestedMessage.B179',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2043,
+  serialized_end=2049,
+)
+
+_LOTSNESTEDMESSAGE_B180 = _descriptor.Descriptor(
+  name='B180',
+  full_name='google.protobuf.internal.LotsNestedMessage.B180',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2051,
+  serialized_end=2057,
+)
+
+_LOTSNESTEDMESSAGE_B181 = _descriptor.Descriptor(
+  name='B181',
+  full_name='google.protobuf.internal.LotsNestedMessage.B181',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2059,
+  serialized_end=2065,
+)
+
+_LOTSNESTEDMESSAGE_B182 = _descriptor.Descriptor(
+  name='B182',
+  full_name='google.protobuf.internal.LotsNestedMessage.B182',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2067,
+  serialized_end=2073,
+)
+
+_LOTSNESTEDMESSAGE_B183 = _descriptor.Descriptor(
+  name='B183',
+  full_name='google.protobuf.internal.LotsNestedMessage.B183',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2075,
+  serialized_end=2081,
+)
+
+_LOTSNESTEDMESSAGE_B184 = _descriptor.Descriptor(
+  name='B184',
+  full_name='google.protobuf.internal.LotsNestedMessage.B184',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2083,
+  serialized_end=2089,
+)
+
+_LOTSNESTEDMESSAGE_B185 = _descriptor.Descriptor(
+  name='B185',
+  full_name='google.protobuf.internal.LotsNestedMessage.B185',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2091,
+  serialized_end=2097,
+)
+
+_LOTSNESTEDMESSAGE_B186 = _descriptor.Descriptor(
+  name='B186',
+  full_name='google.protobuf.internal.LotsNestedMessage.B186',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2099,
+  serialized_end=2105,
+)
+
+_LOTSNESTEDMESSAGE_B187 = _descriptor.Descriptor(
+  name='B187',
+  full_name='google.protobuf.internal.LotsNestedMessage.B187',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2107,
+  serialized_end=2113,
+)
+
+_LOTSNESTEDMESSAGE_B188 = _descriptor.Descriptor(
+  name='B188',
+  full_name='google.protobuf.internal.LotsNestedMessage.B188',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2115,
+  serialized_end=2121,
+)
+
+_LOTSNESTEDMESSAGE_B189 = _descriptor.Descriptor(
+  name='B189',
+  full_name='google.protobuf.internal.LotsNestedMessage.B189',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2123,
+  serialized_end=2129,
+)
+
+_LOTSNESTEDMESSAGE_B190 = _descriptor.Descriptor(
+  name='B190',
+  full_name='google.protobuf.internal.LotsNestedMessage.B190',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2131,
+  serialized_end=2137,
+)
+
+_LOTSNESTEDMESSAGE_B191 = _descriptor.Descriptor(
+  name='B191',
+  full_name='google.protobuf.internal.LotsNestedMessage.B191',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2139,
+  serialized_end=2145,
+)
+
+_LOTSNESTEDMESSAGE_B192 = _descriptor.Descriptor(
+  name='B192',
+  full_name='google.protobuf.internal.LotsNestedMessage.B192',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2147,
+  serialized_end=2153,
+)
+
+_LOTSNESTEDMESSAGE_B193 = _descriptor.Descriptor(
+  name='B193',
+  full_name='google.protobuf.internal.LotsNestedMessage.B193',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2155,
+  serialized_end=2161,
+)
+
+_LOTSNESTEDMESSAGE_B194 = _descriptor.Descriptor(
+  name='B194',
+  full_name='google.protobuf.internal.LotsNestedMessage.B194',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2163,
+  serialized_end=2169,
+)
+
+_LOTSNESTEDMESSAGE_B195 = _descriptor.Descriptor(
+  name='B195',
+  full_name='google.protobuf.internal.LotsNestedMessage.B195',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2171,
+  serialized_end=2177,
+)
+
+_LOTSNESTEDMESSAGE_B196 = _descriptor.Descriptor(
+  name='B196',
+  full_name='google.protobuf.internal.LotsNestedMessage.B196',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2179,
+  serialized_end=2185,
+)
+
+_LOTSNESTEDMESSAGE_B197 = _descriptor.Descriptor(
+  name='B197',
+  full_name='google.protobuf.internal.LotsNestedMessage.B197',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2187,
+  serialized_end=2193,
+)
+
+_LOTSNESTEDMESSAGE_B198 = _descriptor.Descriptor(
+  name='B198',
+  full_name='google.protobuf.internal.LotsNestedMessage.B198',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2195,
+  serialized_end=2201,
+)
+
+_LOTSNESTEDMESSAGE_B199 = _descriptor.Descriptor(
+  name='B199',
+  full_name='google.protobuf.internal.LotsNestedMessage.B199',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2203,
+  serialized_end=2209,
+)
+
+_LOTSNESTEDMESSAGE_B200 = _descriptor.Descriptor(
+  name='B200',
+  full_name='google.protobuf.internal.LotsNestedMessage.B200',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2211,
+  serialized_end=2217,
+)
+
+_LOTSNESTEDMESSAGE_B201 = _descriptor.Descriptor(
+  name='B201',
+  full_name='google.protobuf.internal.LotsNestedMessage.B201',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2219,
+  serialized_end=2225,
+)
+
+_LOTSNESTEDMESSAGE_B202 = _descriptor.Descriptor(
+  name='B202',
+  full_name='google.protobuf.internal.LotsNestedMessage.B202',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2227,
+  serialized_end=2233,
+)
+
+_LOTSNESTEDMESSAGE_B203 = _descriptor.Descriptor(
+  name='B203',
+  full_name='google.protobuf.internal.LotsNestedMessage.B203',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2235,
+  serialized_end=2241,
+)
+
+_LOTSNESTEDMESSAGE_B204 = _descriptor.Descriptor(
+  name='B204',
+  full_name='google.protobuf.internal.LotsNestedMessage.B204',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2243,
+  serialized_end=2249,
+)
+
+_LOTSNESTEDMESSAGE_B205 = _descriptor.Descriptor(
+  name='B205',
+  full_name='google.protobuf.internal.LotsNestedMessage.B205',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2251,
+  serialized_end=2257,
+)
+
+_LOTSNESTEDMESSAGE_B206 = _descriptor.Descriptor(
+  name='B206',
+  full_name='google.protobuf.internal.LotsNestedMessage.B206',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2259,
+  serialized_end=2265,
+)
+
+_LOTSNESTEDMESSAGE_B207 = _descriptor.Descriptor(
+  name='B207',
+  full_name='google.protobuf.internal.LotsNestedMessage.B207',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2267,
+  serialized_end=2273,
+)
+
+_LOTSNESTEDMESSAGE_B208 = _descriptor.Descriptor(
+  name='B208',
+  full_name='google.protobuf.internal.LotsNestedMessage.B208',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2275,
+  serialized_end=2281,
+)
+
+_LOTSNESTEDMESSAGE_B209 = _descriptor.Descriptor(
+  name='B209',
+  full_name='google.protobuf.internal.LotsNestedMessage.B209',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2283,
+  serialized_end=2289,
+)
+
+_LOTSNESTEDMESSAGE_B210 = _descriptor.Descriptor(
+  name='B210',
+  full_name='google.protobuf.internal.LotsNestedMessage.B210',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2291,
+  serialized_end=2297,
+)
+
+_LOTSNESTEDMESSAGE_B211 = _descriptor.Descriptor(
+  name='B211',
+  full_name='google.protobuf.internal.LotsNestedMessage.B211',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2299,
+  serialized_end=2305,
+)
+
+_LOTSNESTEDMESSAGE_B212 = _descriptor.Descriptor(
+  name='B212',
+  full_name='google.protobuf.internal.LotsNestedMessage.B212',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2307,
+  serialized_end=2313,
+)
+
+_LOTSNESTEDMESSAGE_B213 = _descriptor.Descriptor(
+  name='B213',
+  full_name='google.protobuf.internal.LotsNestedMessage.B213',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2315,
+  serialized_end=2321,
+)
+
+_LOTSNESTEDMESSAGE_B214 = _descriptor.Descriptor(
+  name='B214',
+  full_name='google.protobuf.internal.LotsNestedMessage.B214',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2323,
+  serialized_end=2329,
+)
+
+_LOTSNESTEDMESSAGE_B215 = _descriptor.Descriptor(
+  name='B215',
+  full_name='google.protobuf.internal.LotsNestedMessage.B215',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2331,
+  serialized_end=2337,
+)
+
+_LOTSNESTEDMESSAGE_B216 = _descriptor.Descriptor(
+  name='B216',
+  full_name='google.protobuf.internal.LotsNestedMessage.B216',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2339,
+  serialized_end=2345,
+)
+
+_LOTSNESTEDMESSAGE_B217 = _descriptor.Descriptor(
+  name='B217',
+  full_name='google.protobuf.internal.LotsNestedMessage.B217',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2347,
+  serialized_end=2353,
+)
+
+_LOTSNESTEDMESSAGE_B218 = _descriptor.Descriptor(
+  name='B218',
+  full_name='google.protobuf.internal.LotsNestedMessage.B218',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2355,
+  serialized_end=2361,
+)
+
+_LOTSNESTEDMESSAGE_B219 = _descriptor.Descriptor(
+  name='B219',
+  full_name='google.protobuf.internal.LotsNestedMessage.B219',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2363,
+  serialized_end=2369,
+)
+
+_LOTSNESTEDMESSAGE_B220 = _descriptor.Descriptor(
+  name='B220',
+  full_name='google.protobuf.internal.LotsNestedMessage.B220',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2371,
+  serialized_end=2377,
+)
+
+_LOTSNESTEDMESSAGE_B221 = _descriptor.Descriptor(
+  name='B221',
+  full_name='google.protobuf.internal.LotsNestedMessage.B221',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2379,
+  serialized_end=2385,
+)
+
+_LOTSNESTEDMESSAGE_B222 = _descriptor.Descriptor(
+  name='B222',
+  full_name='google.protobuf.internal.LotsNestedMessage.B222',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2387,
+  serialized_end=2393,
+)
+
+_LOTSNESTEDMESSAGE_B223 = _descriptor.Descriptor(
+  name='B223',
+  full_name='google.protobuf.internal.LotsNestedMessage.B223',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2395,
+  serialized_end=2401,
+)
+
+_LOTSNESTEDMESSAGE_B224 = _descriptor.Descriptor(
+  name='B224',
+  full_name='google.protobuf.internal.LotsNestedMessage.B224',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2403,
+  serialized_end=2409,
+)
+
+_LOTSNESTEDMESSAGE_B225 = _descriptor.Descriptor(
+  name='B225',
+  full_name='google.protobuf.internal.LotsNestedMessage.B225',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2411,
+  serialized_end=2417,
+)
+
+_LOTSNESTEDMESSAGE_B226 = _descriptor.Descriptor(
+  name='B226',
+  full_name='google.protobuf.internal.LotsNestedMessage.B226',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2419,
+  serialized_end=2425,
+)
+
+_LOTSNESTEDMESSAGE_B227 = _descriptor.Descriptor(
+  name='B227',
+  full_name='google.protobuf.internal.LotsNestedMessage.B227',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2427,
+  serialized_end=2433,
+)
+
+_LOTSNESTEDMESSAGE_B228 = _descriptor.Descriptor(
+  name='B228',
+  full_name='google.protobuf.internal.LotsNestedMessage.B228',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2435,
+  serialized_end=2441,
+)
+
+_LOTSNESTEDMESSAGE_B229 = _descriptor.Descriptor(
+  name='B229',
+  full_name='google.protobuf.internal.LotsNestedMessage.B229',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2443,
+  serialized_end=2449,
+)
+
+_LOTSNESTEDMESSAGE_B230 = _descriptor.Descriptor(
+  name='B230',
+  full_name='google.protobuf.internal.LotsNestedMessage.B230',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2451,
+  serialized_end=2457,
+)
+
+_LOTSNESTEDMESSAGE_B231 = _descriptor.Descriptor(
+  name='B231',
+  full_name='google.protobuf.internal.LotsNestedMessage.B231',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2459,
+  serialized_end=2465,
+)
+
+_LOTSNESTEDMESSAGE_B232 = _descriptor.Descriptor(
+  name='B232',
+  full_name='google.protobuf.internal.LotsNestedMessage.B232',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2467,
+  serialized_end=2473,
+)
+
+_LOTSNESTEDMESSAGE_B233 = _descriptor.Descriptor(
+  name='B233',
+  full_name='google.protobuf.internal.LotsNestedMessage.B233',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2475,
+  serialized_end=2481,
+)
+
+_LOTSNESTEDMESSAGE_B234 = _descriptor.Descriptor(
+  name='B234',
+  full_name='google.protobuf.internal.LotsNestedMessage.B234',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2483,
+  serialized_end=2489,
+)
+
+_LOTSNESTEDMESSAGE_B235 = _descriptor.Descriptor(
+  name='B235',
+  full_name='google.protobuf.internal.LotsNestedMessage.B235',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2491,
+  serialized_end=2497,
+)
+
+_LOTSNESTEDMESSAGE_B236 = _descriptor.Descriptor(
+  name='B236',
+  full_name='google.protobuf.internal.LotsNestedMessage.B236',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2499,
+  serialized_end=2505,
+)
+
+_LOTSNESTEDMESSAGE_B237 = _descriptor.Descriptor(
+  name='B237',
+  full_name='google.protobuf.internal.LotsNestedMessage.B237',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2507,
+  serialized_end=2513,
+)
+
+_LOTSNESTEDMESSAGE_B238 = _descriptor.Descriptor(
+  name='B238',
+  full_name='google.protobuf.internal.LotsNestedMessage.B238',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2515,
+  serialized_end=2521,
+)
+
+_LOTSNESTEDMESSAGE_B239 = _descriptor.Descriptor(
+  name='B239',
+  full_name='google.protobuf.internal.LotsNestedMessage.B239',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2523,
+  serialized_end=2529,
+)
+
+_LOTSNESTEDMESSAGE_B240 = _descriptor.Descriptor(
+  name='B240',
+  full_name='google.protobuf.internal.LotsNestedMessage.B240',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
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+  extensions=[
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+  nested_types=[],
+  enum_types=[
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+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2531,
+  serialized_end=2537,
+)
+
+_LOTSNESTEDMESSAGE_B241 = _descriptor.Descriptor(
+  name='B241',
+  full_name='google.protobuf.internal.LotsNestedMessage.B241',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
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+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
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+  serialized_start=2539,
+  serialized_end=2545,
+)
+
+_LOTSNESTEDMESSAGE_B242 = _descriptor.Descriptor(
+  name='B242',
+  full_name='google.protobuf.internal.LotsNestedMessage.B242',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2547,
+  serialized_end=2553,
+)
+
+_LOTSNESTEDMESSAGE_B243 = _descriptor.Descriptor(
+  name='B243',
+  full_name='google.protobuf.internal.LotsNestedMessage.B243',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2555,
+  serialized_end=2561,
+)
+
+_LOTSNESTEDMESSAGE_B244 = _descriptor.Descriptor(
+  name='B244',
+  full_name='google.protobuf.internal.LotsNestedMessage.B244',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2563,
+  serialized_end=2569,
+)
+
+_LOTSNESTEDMESSAGE_B245 = _descriptor.Descriptor(
+  name='B245',
+  full_name='google.protobuf.internal.LotsNestedMessage.B245',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2571,
+  serialized_end=2577,
+)
+
+_LOTSNESTEDMESSAGE_B246 = _descriptor.Descriptor(
+  name='B246',
+  full_name='google.protobuf.internal.LotsNestedMessage.B246',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2579,
+  serialized_end=2585,
+)
+
+_LOTSNESTEDMESSAGE_B247 = _descriptor.Descriptor(
+  name='B247',
+  full_name='google.protobuf.internal.LotsNestedMessage.B247',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2587,
+  serialized_end=2593,
+)
+
+_LOTSNESTEDMESSAGE_B248 = _descriptor.Descriptor(
+  name='B248',
+  full_name='google.protobuf.internal.LotsNestedMessage.B248',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2595,
+  serialized_end=2601,
+)
+
+_LOTSNESTEDMESSAGE_B249 = _descriptor.Descriptor(
+  name='B249',
+  full_name='google.protobuf.internal.LotsNestedMessage.B249',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2603,
+  serialized_end=2609,
+)
+
+_LOTSNESTEDMESSAGE_B250 = _descriptor.Descriptor(
+  name='B250',
+  full_name='google.protobuf.internal.LotsNestedMessage.B250',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2611,
+  serialized_end=2617,
+)
+
+_LOTSNESTEDMESSAGE_B251 = _descriptor.Descriptor(
+  name='B251',
+  full_name='google.protobuf.internal.LotsNestedMessage.B251',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2619,
+  serialized_end=2625,
+)
+
+_LOTSNESTEDMESSAGE_B252 = _descriptor.Descriptor(
+  name='B252',
+  full_name='google.protobuf.internal.LotsNestedMessage.B252',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2627,
+  serialized_end=2633,
+)
+
+_LOTSNESTEDMESSAGE_B253 = _descriptor.Descriptor(
+  name='B253',
+  full_name='google.protobuf.internal.LotsNestedMessage.B253',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2635,
+  serialized_end=2641,
+)
+
+_LOTSNESTEDMESSAGE_B254 = _descriptor.Descriptor(
+  name='B254',
+  full_name='google.protobuf.internal.LotsNestedMessage.B254',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2643,
+  serialized_end=2649,
+)
+
+_LOTSNESTEDMESSAGE_B255 = _descriptor.Descriptor(
+  name='B255',
+  full_name='google.protobuf.internal.LotsNestedMessage.B255',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2651,
+  serialized_end=2657,
+)
+
+_LOTSNESTEDMESSAGE = _descriptor.Descriptor(
+  name='LotsNestedMessage',
+  full_name='google.protobuf.internal.LotsNestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[_LOTSNESTEDMESSAGE_B0, _LOTSNESTEDMESSAGE_B1, _LOTSNESTEDMESSAGE_B2, _LOTSNESTEDMESSAGE_B3, _LOTSNESTEDMESSAGE_B4, _LOTSNESTEDMESSAGE_B5, _LOTSNESTEDMESSAGE_B6, _LOTSNESTEDMESSAGE_B7, _LOTSNESTEDMESSAGE_B8, _LOTSNESTEDMESSAGE_B9, _LOTSNESTEDMESSAGE_B10, _LOTSNESTEDMESSAGE_B11, _LOTSNESTEDMESSAGE_B12, _LOTSNESTEDMESSAGE_B13, _LOTSNESTEDMESSAGE_B14, _LOTSNESTEDMESSAGE_B15, _LOTSNESTEDMESSAGE_B16, _LOTSNESTEDMESSAGE_B17, _LOTSNESTEDMESSAGE_B18, _LOTSNESTEDMESSAGE_B19, _LOTSNESTEDMESSAGE_B20, _LOTSNESTEDMESSAGE_B21, _LOTSNESTEDMESSAGE_B22, _LOTSNESTEDMESSAGE_B23, _LOTSNESTEDMESSAGE_B24, _LOTSNESTEDMESSAGE_B25, _LOTSNESTEDMESSAGE_B26, _LOTSNESTEDMESSAGE_B27, _LOTSNESTEDMESSAGE_B28, _LOTSNESTEDMESSAGE_B29, _LOTSNESTEDMESSAGE_B30, _LOTSNESTEDMESSAGE_B31, _LOTSNESTEDMESSAGE_B32, _LOTSNESTEDMESSAGE_B33, _LOTSNESTEDMESSAGE_B34, _LOTSNESTEDMESSAGE_B35, _LOTSNESTEDMESSAGE_B36, _LOTSNESTEDMESSAGE_B37, _LOTSNESTEDMESSAGE_B38, _LOTSNESTEDMESSAGE_B39, _LOTSNESTEDMESSAGE_B40, _LOTSNESTEDMESSAGE_B41, _LOTSNESTEDMESSAGE_B42, _LOTSNESTEDMESSAGE_B43, _LOTSNESTEDMESSAGE_B44, _LOTSNESTEDMESSAGE_B45, _LOTSNESTEDMESSAGE_B46, _LOTSNESTEDMESSAGE_B47, _LOTSNESTEDMESSAGE_B48, _LOTSNESTEDMESSAGE_B49, _LOTSNESTEDMESSAGE_B50, _LOTSNESTEDMESSAGE_B51, _LOTSNESTEDMESSAGE_B52, _LOTSNESTEDMESSAGE_B53, _LOTSNESTEDMESSAGE_B54, _LOTSNESTEDMESSAGE_B55, _LOTSNESTEDMESSAGE_B56, _LOTSNESTEDMESSAGE_B57, _LOTSNESTEDMESSAGE_B58, _LOTSNESTEDMESSAGE_B59, _LOTSNESTEDMESSAGE_B60, _LOTSNESTEDMESSAGE_B61, _LOTSNESTEDMESSAGE_B62, _LOTSNESTEDMESSAGE_B63, _LOTSNESTEDMESSAGE_B64, _LOTSNESTEDMESSAGE_B65, _LOTSNESTEDMESSAGE_B66, _LOTSNESTEDMESSAGE_B67, _LOTSNESTEDMESSAGE_B68, _LOTSNESTEDMESSAGE_B69, _LOTSNESTEDMESSAGE_B70, _LOTSNESTEDMESSAGE_B71, _LOTSNESTEDMESSAGE_B72, _LOTSNESTEDMESSAGE_B73, _LOTSNESTEDMESSAGE_B74, _LOTSNESTEDMESSAGE_B75, _LOTSNESTEDMESSAGE_B76, _LOTSNESTEDMESSAGE_B77, _LOTSNESTEDMESSAGE_B78, _LOTSNESTEDMESSAGE_B79, _LOTSNESTEDMESSAGE_B80, _LOTSNESTEDMESSAGE_B81, _LOTSNESTEDMESSAGE_B82, _LOTSNESTEDMESSAGE_B83, _LOTSNESTEDMESSAGE_B84, _LOTSNESTEDMESSAGE_B85, _LOTSNESTEDMESSAGE_B86, _LOTSNESTEDMESSAGE_B87, _LOTSNESTEDMESSAGE_B88, _LOTSNESTEDMESSAGE_B89, _LOTSNESTEDMESSAGE_B90, _LOTSNESTEDMESSAGE_B91, _LOTSNESTEDMESSAGE_B92, _LOTSNESTEDMESSAGE_B93, _LOTSNESTEDMESSAGE_B94, _LOTSNESTEDMESSAGE_B95, _LOTSNESTEDMESSAGE_B96, _LOTSNESTEDMESSAGE_B97, _LOTSNESTEDMESSAGE_B98, _LOTSNESTEDMESSAGE_B99, _LOTSNESTEDMESSAGE_B100, _LOTSNESTEDMESSAGE_B101, _LOTSNESTEDMESSAGE_B102, _LOTSNESTEDMESSAGE_B103, _LOTSNESTEDMESSAGE_B104, _LOTSNESTEDMESSAGE_B105, _LOTSNESTEDMESSAGE_B106, _LOTSNESTEDMESSAGE_B107, _LOTSNESTEDMESSAGE_B108, _LOTSNESTEDMESSAGE_B109, _LOTSNESTEDMESSAGE_B110, _LOTSNESTEDMESSAGE_B111, _LOTSNESTEDMESSAGE_B112, _LOTSNESTEDMESSAGE_B113, _LOTSNESTEDMESSAGE_B114, _LOTSNESTEDMESSAGE_B115, _LOTSNESTEDMESSAGE_B116, _LOTSNESTEDMESSAGE_B117, _LOTSNESTEDMESSAGE_B118, _LOTSNESTEDMESSAGE_B119, _LOTSNESTEDMESSAGE_B120, _LOTSNESTEDMESSAGE_B121, _LOTSNESTEDMESSAGE_B122, _LOTSNESTEDMESSAGE_B123, _LOTSNESTEDMESSAGE_B124, _LOTSNESTEDMESSAGE_B125, _LOTSNESTEDMESSAGE_B126, _LOTSNESTEDMESSAGE_B127, _LOTSNESTEDMESSAGE_B128, _LOTSNESTEDMESSAGE_B129, _LOTSNESTEDMESSAGE_B130, _LOTSNESTEDMESSAGE_B131, _LOTSNESTEDMESSAGE_B132, _LOTSNESTEDMESSAGE_B133, _LOTSNESTEDMESSAGE_B134, _LOTSNESTEDMESSAGE_B135, _LOTSNESTEDMESSAGE_B136, _LOTSNESTEDMESSAGE_B137, _LOTSNESTEDMESSAGE_B138, _LOTSNESTEDMESSAGE_B139, _LOTSNESTEDMESSAGE_B140, _LOTSNESTEDMESSAGE_B141, _LOTSNESTEDMESSAGE_B142, _LOTSNESTEDMESSAGE_B143, _LOTSNESTEDMESSAGE_B144, _LOTSNESTEDMESSAGE_B145, _LOTSNESTEDMESSAGE_B146, _LOTSNESTEDMESSAGE_B147, _LOTSNESTEDMESSAGE_B148, _LOTSNESTEDMESSAGE_B149, _LOTSNESTEDMESSAGE_B150, _LOTSNESTEDMESSAGE_B151, _LOTSNESTEDMESSAGE_B152, _LOTSNESTEDMESSAGE_B153, _LOTSNESTEDMESSAGE_B154, _LOTSNESTEDMESSAGE_B155, _LOTSNESTEDMESSAGE_B156, _LOTSNESTEDMESSAGE_B157, _LOTSNESTEDMESSAGE_B158, _LOTSNESTEDMESSAGE_B159, _LOTSNESTEDMESSAGE_B160, _LOTSNESTEDMESSAGE_B161, _LOTSNESTEDMESSAGE_B162, _LOTSNESTEDMESSAGE_B163, _LOTSNESTEDMESSAGE_B164, _LOTSNESTEDMESSAGE_B165, _LOTSNESTEDMESSAGE_B166, _LOTSNESTEDMESSAGE_B167, _LOTSNESTEDMESSAGE_B168, _LOTSNESTEDMESSAGE_B169, _LOTSNESTEDMESSAGE_B170, _LOTSNESTEDMESSAGE_B171, _LOTSNESTEDMESSAGE_B172, _LOTSNESTEDMESSAGE_B173, _LOTSNESTEDMESSAGE_B174, _LOTSNESTEDMESSAGE_B175, _LOTSNESTEDMESSAGE_B176, _LOTSNESTEDMESSAGE_B177, _LOTSNESTEDMESSAGE_B178, _LOTSNESTEDMESSAGE_B179, _LOTSNESTEDMESSAGE_B180, _LOTSNESTEDMESSAGE_B181, _LOTSNESTEDMESSAGE_B182, _LOTSNESTEDMESSAGE_B183, _LOTSNESTEDMESSAGE_B184, _LOTSNESTEDMESSAGE_B185, _LOTSNESTEDMESSAGE_B186, _LOTSNESTEDMESSAGE_B187, _LOTSNESTEDMESSAGE_B188, _LOTSNESTEDMESSAGE_B189, _LOTSNESTEDMESSAGE_B190, _LOTSNESTEDMESSAGE_B191, _LOTSNESTEDMESSAGE_B192, _LOTSNESTEDMESSAGE_B193, _LOTSNESTEDMESSAGE_B194, _LOTSNESTEDMESSAGE_B195, _LOTSNESTEDMESSAGE_B196, _LOTSNESTEDMESSAGE_B197, _LOTSNESTEDMESSAGE_B198, _LOTSNESTEDMESSAGE_B199, _LOTSNESTEDMESSAGE_B200, _LOTSNESTEDMESSAGE_B201, _LOTSNESTEDMESSAGE_B202, _LOTSNESTEDMESSAGE_B203, _LOTSNESTEDMESSAGE_B204, _LOTSNESTEDMESSAGE_B205, _LOTSNESTEDMESSAGE_B206, _LOTSNESTEDMESSAGE_B207, _LOTSNESTEDMESSAGE_B208, _LOTSNESTEDMESSAGE_B209, _LOTSNESTEDMESSAGE_B210, _LOTSNESTEDMESSAGE_B211, _LOTSNESTEDMESSAGE_B212, _LOTSNESTEDMESSAGE_B213, _LOTSNESTEDMESSAGE_B214, _LOTSNESTEDMESSAGE_B215, _LOTSNESTEDMESSAGE_B216, _LOTSNESTEDMESSAGE_B217, _LOTSNESTEDMESSAGE_B218, _LOTSNESTEDMESSAGE_B219, _LOTSNESTEDMESSAGE_B220, _LOTSNESTEDMESSAGE_B221, _LOTSNESTEDMESSAGE_B222, _LOTSNESTEDMESSAGE_B223, _LOTSNESTEDMESSAGE_B224, _LOTSNESTEDMESSAGE_B225, _LOTSNESTEDMESSAGE_B226, _LOTSNESTEDMESSAGE_B227, _LOTSNESTEDMESSAGE_B228, _LOTSNESTEDMESSAGE_B229, _LOTSNESTEDMESSAGE_B230, _LOTSNESTEDMESSAGE_B231, _LOTSNESTEDMESSAGE_B232, _LOTSNESTEDMESSAGE_B233, _LOTSNESTEDMESSAGE_B234, _LOTSNESTEDMESSAGE_B235, _LOTSNESTEDMESSAGE_B236, _LOTSNESTEDMESSAGE_B237, _LOTSNESTEDMESSAGE_B238, _LOTSNESTEDMESSAGE_B239, _LOTSNESTEDMESSAGE_B240, _LOTSNESTEDMESSAGE_B241, _LOTSNESTEDMESSAGE_B242, _LOTSNESTEDMESSAGE_B243, _LOTSNESTEDMESSAGE_B244, _LOTSNESTEDMESSAGE_B245, _LOTSNESTEDMESSAGE_B246, _LOTSNESTEDMESSAGE_B247, _LOTSNESTEDMESSAGE_B248, _LOTSNESTEDMESSAGE_B249, _LOTSNESTEDMESSAGE_B250, _LOTSNESTEDMESSAGE_B251, _LOTSNESTEDMESSAGE_B252, _LOTSNESTEDMESSAGE_B253, _LOTSNESTEDMESSAGE_B254, _LOTSNESTEDMESSAGE_B255, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=700,
+  serialized_end=2657,
+)
+
+_CLASS_TRY.containing_type = _CLASS
+_CLASS.fields_by_name['as'].enum_type = _IS
+_CLASS.fields_by_name['enum_field'].enum_type = _IS
+_CLASS.fields_by_name['nested_enum_field'].enum_type = _CLASS_FOR
+_CLASS.fields_by_name['nested_message'].message_type = _CLASS_TRY
+_CLASS_FOR.containing_type = _CLASS
+_TESTFULLKEYWORD.fields_by_name['field1'].message_type = _OUTOFORDERFIELDS
+_TESTFULLKEYWORD.fields_by_name['field2'].message_type = _CLASS
+_LOTSNESTEDMESSAGE_B0.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B1.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B2.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B3.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B4.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B5.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B6.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B7.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B8.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B9.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B10.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B11.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B12.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B13.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B14.containing_type = _LOTSNESTEDMESSAGE
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+_LOTSNESTEDMESSAGE_B16.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B17.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B18.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B19.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B20.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B21.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B22.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B23.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B24.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B25.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B26.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B27.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B28.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B29.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B30.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B31.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B32.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B33.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B34.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B35.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B36.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B37.containing_type = _LOTSNESTEDMESSAGE
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+_LOTSNESTEDMESSAGE_B39.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B40.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B41.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B42.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B43.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B44.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B45.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B46.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B47.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B48.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B49.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B50.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B51.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B52.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B53.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B54.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B55.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B56.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B57.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B58.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B59.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B60.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B61.containing_type = _LOTSNESTEDMESSAGE
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+_LOTSNESTEDMESSAGE_B63.containing_type = _LOTSNESTEDMESSAGE
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+_LOTSNESTEDMESSAGE_B239.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B240.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B241.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B242.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B243.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B244.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B245.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B246.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B247.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B248.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B249.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B250.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B251.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B252.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B253.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B254.containing_type = _LOTSNESTEDMESSAGE
+_LOTSNESTEDMESSAGE_B255.containing_type = _LOTSNESTEDMESSAGE
+DESCRIPTOR.message_types_by_name['OutOfOrderFields'] = _OUTOFORDERFIELDS
+DESCRIPTOR.message_types_by_name['class'] = _CLASS
+DESCRIPTOR.message_types_by_name['ExtendClass'] = _EXTENDCLASS
+DESCRIPTOR.message_types_by_name['TestFullKeyword'] = _TESTFULLKEYWORD
+DESCRIPTOR.message_types_by_name['LotsNestedMessage'] = _LOTSNESTEDMESSAGE
+DESCRIPTOR.enum_types_by_name['is'] = _IS
+DESCRIPTOR.extensions_by_name['optional_uint64'] = optional_uint64
+DESCRIPTOR.extensions_by_name['optional_int64'] = optional_int64
+DESCRIPTOR.extensions_by_name['continue'] = globals()['continue']
+DESCRIPTOR.extensions_by_name['with'] = globals()['with']
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+OutOfOrderFields = _reflection.GeneratedProtocolMessageType('OutOfOrderFields', (_message.Message,), {
+  'DESCRIPTOR' : _OUTOFORDERFIELDS,
+  '__module__' : 'google.protobuf.internal.more_messages_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.OutOfOrderFields)
+  })
+_sym_db.RegisterMessage(OutOfOrderFields)
+
+globals()['class'] = _reflection.GeneratedProtocolMessageType('class', (_message.Message,), {
+
+  'try' : _reflection.GeneratedProtocolMessageType('try', (_message.Message,), {
+    'DESCRIPTOR' : _CLASS_TRY,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.class.try)
+    })
+  ,
+  'DESCRIPTOR' : _CLASS,
+  '__module__' : 'google.protobuf.internal.more_messages_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.class)
+  })
+_sym_db.RegisterMessage(globals()['class'])
+_sym_db.RegisterMessage(getattr(globals()['class'], 'try'))
+
+ExtendClass = _reflection.GeneratedProtocolMessageType('ExtendClass', (_message.Message,), {
+  'DESCRIPTOR' : _EXTENDCLASS,
+  '__module__' : 'google.protobuf.internal.more_messages_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.ExtendClass)
+  })
+_sym_db.RegisterMessage(ExtendClass)
+
+TestFullKeyword = _reflection.GeneratedProtocolMessageType('TestFullKeyword', (_message.Message,), {
+  'DESCRIPTOR' : _TESTFULLKEYWORD,
+  '__module__' : 'google.protobuf.internal.more_messages_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.TestFullKeyword)
+  })
+_sym_db.RegisterMessage(TestFullKeyword)
+
+LotsNestedMessage = _reflection.GeneratedProtocolMessageType('LotsNestedMessage', (_message.Message,), {
+
+  'B0' : _reflection.GeneratedProtocolMessageType('B0', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B0,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B0)
+    })
+  ,
+
+  'B1' : _reflection.GeneratedProtocolMessageType('B1', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B1,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B1)
+    })
+  ,
+
+  'B2' : _reflection.GeneratedProtocolMessageType('B2', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B2,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B2)
+    })
+  ,
+
+  'B3' : _reflection.GeneratedProtocolMessageType('B3', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B3,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B3)
+    })
+  ,
+
+  'B4' : _reflection.GeneratedProtocolMessageType('B4', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B4,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B4)
+    })
+  ,
+
+  'B5' : _reflection.GeneratedProtocolMessageType('B5', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B5,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B5)
+    })
+  ,
+
+  'B6' : _reflection.GeneratedProtocolMessageType('B6', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B6,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B6)
+    })
+  ,
+
+  'B7' : _reflection.GeneratedProtocolMessageType('B7', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B7,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B7)
+    })
+  ,
+
+  'B8' : _reflection.GeneratedProtocolMessageType('B8', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B8,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B8)
+    })
+  ,
+
+  'B9' : _reflection.GeneratedProtocolMessageType('B9', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B9,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B9)
+    })
+  ,
+
+  'B10' : _reflection.GeneratedProtocolMessageType('B10', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B10,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B10)
+    })
+  ,
+
+  'B11' : _reflection.GeneratedProtocolMessageType('B11', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B11,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B11)
+    })
+  ,
+
+  'B12' : _reflection.GeneratedProtocolMessageType('B12', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B12,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B12)
+    })
+  ,
+
+  'B13' : _reflection.GeneratedProtocolMessageType('B13', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B13,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B13)
+    })
+  ,
+
+  'B14' : _reflection.GeneratedProtocolMessageType('B14', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B14,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B14)
+    })
+  ,
+
+  'B15' : _reflection.GeneratedProtocolMessageType('B15', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B15,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B15)
+    })
+  ,
+
+  'B16' : _reflection.GeneratedProtocolMessageType('B16', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B16,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
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+  'B220' : _reflection.GeneratedProtocolMessageType('B220', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B220,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B220)
+    })
+  ,
+
+  'B221' : _reflection.GeneratedProtocolMessageType('B221', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B221,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B221)
+    })
+  ,
+
+  'B222' : _reflection.GeneratedProtocolMessageType('B222', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B222,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B222)
+    })
+  ,
+
+  'B223' : _reflection.GeneratedProtocolMessageType('B223', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B223,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B223)
+    })
+  ,
+
+  'B224' : _reflection.GeneratedProtocolMessageType('B224', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B224,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B224)
+    })
+  ,
+
+  'B225' : _reflection.GeneratedProtocolMessageType('B225', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B225,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B225)
+    })
+  ,
+
+  'B226' : _reflection.GeneratedProtocolMessageType('B226', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B226,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B226)
+    })
+  ,
+
+  'B227' : _reflection.GeneratedProtocolMessageType('B227', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B227,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B227)
+    })
+  ,
+
+  'B228' : _reflection.GeneratedProtocolMessageType('B228', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B228,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B228)
+    })
+  ,
+
+  'B229' : _reflection.GeneratedProtocolMessageType('B229', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B229,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B229)
+    })
+  ,
+
+  'B230' : _reflection.GeneratedProtocolMessageType('B230', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B230,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B230)
+    })
+  ,
+
+  'B231' : _reflection.GeneratedProtocolMessageType('B231', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B231,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B231)
+    })
+  ,
+
+  'B232' : _reflection.GeneratedProtocolMessageType('B232', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B232,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B232)
+    })
+  ,
+
+  'B233' : _reflection.GeneratedProtocolMessageType('B233', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B233,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B233)
+    })
+  ,
+
+  'B234' : _reflection.GeneratedProtocolMessageType('B234', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B234,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B234)
+    })
+  ,
+
+  'B235' : _reflection.GeneratedProtocolMessageType('B235', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B235,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B235)
+    })
+  ,
+
+  'B236' : _reflection.GeneratedProtocolMessageType('B236', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B236,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B236)
+    })
+  ,
+
+  'B237' : _reflection.GeneratedProtocolMessageType('B237', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B237,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B237)
+    })
+  ,
+
+  'B238' : _reflection.GeneratedProtocolMessageType('B238', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B238,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B238)
+    })
+  ,
+
+  'B239' : _reflection.GeneratedProtocolMessageType('B239', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B239,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B239)
+    })
+  ,
+
+  'B240' : _reflection.GeneratedProtocolMessageType('B240', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B240,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B240)
+    })
+  ,
+
+  'B241' : _reflection.GeneratedProtocolMessageType('B241', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B241,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B241)
+    })
+  ,
+
+  'B242' : _reflection.GeneratedProtocolMessageType('B242', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B242,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B242)
+    })
+  ,
+
+  'B243' : _reflection.GeneratedProtocolMessageType('B243', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B243,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B243)
+    })
+  ,
+
+  'B244' : _reflection.GeneratedProtocolMessageType('B244', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B244,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B244)
+    })
+  ,
+
+  'B245' : _reflection.GeneratedProtocolMessageType('B245', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B245,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B245)
+    })
+  ,
+
+  'B246' : _reflection.GeneratedProtocolMessageType('B246', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B246,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B246)
+    })
+  ,
+
+  'B247' : _reflection.GeneratedProtocolMessageType('B247', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B247,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B247)
+    })
+  ,
+
+  'B248' : _reflection.GeneratedProtocolMessageType('B248', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B248,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B248)
+    })
+  ,
+
+  'B249' : _reflection.GeneratedProtocolMessageType('B249', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B249,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B249)
+    })
+  ,
+
+  'B250' : _reflection.GeneratedProtocolMessageType('B250', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B250,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B250)
+    })
+  ,
+
+  'B251' : _reflection.GeneratedProtocolMessageType('B251', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B251,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B251)
+    })
+  ,
+
+  'B252' : _reflection.GeneratedProtocolMessageType('B252', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B252,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B252)
+    })
+  ,
+
+  'B253' : _reflection.GeneratedProtocolMessageType('B253', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B253,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B253)
+    })
+  ,
+
+  'B254' : _reflection.GeneratedProtocolMessageType('B254', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B254,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B254)
+    })
+  ,
+
+  'B255' : _reflection.GeneratedProtocolMessageType('B255', (_message.Message,), {
+    'DESCRIPTOR' : _LOTSNESTEDMESSAGE_B255,
+    '__module__' : 'google.protobuf.internal.more_messages_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage.B255)
+    })
+  ,
+  'DESCRIPTOR' : _LOTSNESTEDMESSAGE,
+  '__module__' : 'google.protobuf.internal.more_messages_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.internal.LotsNestedMessage)
+  })
+_sym_db.RegisterMessage(LotsNestedMessage)
+_sym_db.RegisterMessage(LotsNestedMessage.B0)
+_sym_db.RegisterMessage(LotsNestedMessage.B1)
+_sym_db.RegisterMessage(LotsNestedMessage.B2)
+_sym_db.RegisterMessage(LotsNestedMessage.B3)
+_sym_db.RegisterMessage(LotsNestedMessage.B4)
+_sym_db.RegisterMessage(LotsNestedMessage.B5)
+_sym_db.RegisterMessage(LotsNestedMessage.B6)
+_sym_db.RegisterMessage(LotsNestedMessage.B7)
+_sym_db.RegisterMessage(LotsNestedMessage.B8)
+_sym_db.RegisterMessage(LotsNestedMessage.B9)
+_sym_db.RegisterMessage(LotsNestedMessage.B10)
+_sym_db.RegisterMessage(LotsNestedMessage.B11)
+_sym_db.RegisterMessage(LotsNestedMessage.B12)
+_sym_db.RegisterMessage(LotsNestedMessage.B13)
+_sym_db.RegisterMessage(LotsNestedMessage.B14)
+_sym_db.RegisterMessage(LotsNestedMessage.B15)
+_sym_db.RegisterMessage(LotsNestedMessage.B16)
+_sym_db.RegisterMessage(LotsNestedMessage.B17)
+_sym_db.RegisterMessage(LotsNestedMessage.B18)
+_sym_db.RegisterMessage(LotsNestedMessage.B19)
+_sym_db.RegisterMessage(LotsNestedMessage.B20)
+_sym_db.RegisterMessage(LotsNestedMessage.B21)
+_sym_db.RegisterMessage(LotsNestedMessage.B22)
+_sym_db.RegisterMessage(LotsNestedMessage.B23)
+_sym_db.RegisterMessage(LotsNestedMessage.B24)
+_sym_db.RegisterMessage(LotsNestedMessage.B25)
+_sym_db.RegisterMessage(LotsNestedMessage.B26)
+_sym_db.RegisterMessage(LotsNestedMessage.B27)
+_sym_db.RegisterMessage(LotsNestedMessage.B28)
+_sym_db.RegisterMessage(LotsNestedMessage.B29)
+_sym_db.RegisterMessage(LotsNestedMessage.B30)
+_sym_db.RegisterMessage(LotsNestedMessage.B31)
+_sym_db.RegisterMessage(LotsNestedMessage.B32)
+_sym_db.RegisterMessage(LotsNestedMessage.B33)
+_sym_db.RegisterMessage(LotsNestedMessage.B34)
+_sym_db.RegisterMessage(LotsNestedMessage.B35)
+_sym_db.RegisterMessage(LotsNestedMessage.B36)
+_sym_db.RegisterMessage(LotsNestedMessage.B37)
+_sym_db.RegisterMessage(LotsNestedMessage.B38)
+_sym_db.RegisterMessage(LotsNestedMessage.B39)
+_sym_db.RegisterMessage(LotsNestedMessage.B40)
+_sym_db.RegisterMessage(LotsNestedMessage.B41)
+_sym_db.RegisterMessage(LotsNestedMessage.B42)
+_sym_db.RegisterMessage(LotsNestedMessage.B43)
+_sym_db.RegisterMessage(LotsNestedMessage.B44)
+_sym_db.RegisterMessage(LotsNestedMessage.B45)
+_sym_db.RegisterMessage(LotsNestedMessage.B46)
+_sym_db.RegisterMessage(LotsNestedMessage.B47)
+_sym_db.RegisterMessage(LotsNestedMessage.B48)
+_sym_db.RegisterMessage(LotsNestedMessage.B49)
+_sym_db.RegisterMessage(LotsNestedMessage.B50)
+_sym_db.RegisterMessage(LotsNestedMessage.B51)
+_sym_db.RegisterMessage(LotsNestedMessage.B52)
+_sym_db.RegisterMessage(LotsNestedMessage.B53)
+_sym_db.RegisterMessage(LotsNestedMessage.B54)
+_sym_db.RegisterMessage(LotsNestedMessage.B55)
+_sym_db.RegisterMessage(LotsNestedMessage.B56)
+_sym_db.RegisterMessage(LotsNestedMessage.B57)
+_sym_db.RegisterMessage(LotsNestedMessage.B58)
+_sym_db.RegisterMessage(LotsNestedMessage.B59)
+_sym_db.RegisterMessage(LotsNestedMessage.B60)
+_sym_db.RegisterMessage(LotsNestedMessage.B61)
+_sym_db.RegisterMessage(LotsNestedMessage.B62)
+_sym_db.RegisterMessage(LotsNestedMessage.B63)
+_sym_db.RegisterMessage(LotsNestedMessage.B64)
+_sym_db.RegisterMessage(LotsNestedMessage.B65)
+_sym_db.RegisterMessage(LotsNestedMessage.B66)
+_sym_db.RegisterMessage(LotsNestedMessage.B67)
+_sym_db.RegisterMessage(LotsNestedMessage.B68)
+_sym_db.RegisterMessage(LotsNestedMessage.B69)
+_sym_db.RegisterMessage(LotsNestedMessage.B70)
+_sym_db.RegisterMessage(LotsNestedMessage.B71)
+_sym_db.RegisterMessage(LotsNestedMessage.B72)
+_sym_db.RegisterMessage(LotsNestedMessage.B73)
+_sym_db.RegisterMessage(LotsNestedMessage.B74)
+_sym_db.RegisterMessage(LotsNestedMessage.B75)
+_sym_db.RegisterMessage(LotsNestedMessage.B76)
+_sym_db.RegisterMessage(LotsNestedMessage.B77)
+_sym_db.RegisterMessage(LotsNestedMessage.B78)
+_sym_db.RegisterMessage(LotsNestedMessage.B79)
+_sym_db.RegisterMessage(LotsNestedMessage.B80)
+_sym_db.RegisterMessage(LotsNestedMessage.B81)
+_sym_db.RegisterMessage(LotsNestedMessage.B82)
+_sym_db.RegisterMessage(LotsNestedMessage.B83)
+_sym_db.RegisterMessage(LotsNestedMessage.B84)
+_sym_db.RegisterMessage(LotsNestedMessage.B85)
+_sym_db.RegisterMessage(LotsNestedMessage.B86)
+_sym_db.RegisterMessage(LotsNestedMessage.B87)
+_sym_db.RegisterMessage(LotsNestedMessage.B88)
+_sym_db.RegisterMessage(LotsNestedMessage.B89)
+_sym_db.RegisterMessage(LotsNestedMessage.B90)
+_sym_db.RegisterMessage(LotsNestedMessage.B91)
+_sym_db.RegisterMessage(LotsNestedMessage.B92)
+_sym_db.RegisterMessage(LotsNestedMessage.B93)
+_sym_db.RegisterMessage(LotsNestedMessage.B94)
+_sym_db.RegisterMessage(LotsNestedMessage.B95)
+_sym_db.RegisterMessage(LotsNestedMessage.B96)
+_sym_db.RegisterMessage(LotsNestedMessage.B97)
+_sym_db.RegisterMessage(LotsNestedMessage.B98)
+_sym_db.RegisterMessage(LotsNestedMessage.B99)
+_sym_db.RegisterMessage(LotsNestedMessage.B100)
+_sym_db.RegisterMessage(LotsNestedMessage.B101)
+_sym_db.RegisterMessage(LotsNestedMessage.B102)
+_sym_db.RegisterMessage(LotsNestedMessage.B103)
+_sym_db.RegisterMessage(LotsNestedMessage.B104)
+_sym_db.RegisterMessage(LotsNestedMessage.B105)
+_sym_db.RegisterMessage(LotsNestedMessage.B106)
+_sym_db.RegisterMessage(LotsNestedMessage.B107)
+_sym_db.RegisterMessage(LotsNestedMessage.B108)
+_sym_db.RegisterMessage(LotsNestedMessage.B109)
+_sym_db.RegisterMessage(LotsNestedMessage.B110)
+_sym_db.RegisterMessage(LotsNestedMessage.B111)
+_sym_db.RegisterMessage(LotsNestedMessage.B112)
+_sym_db.RegisterMessage(LotsNestedMessage.B113)
+_sym_db.RegisterMessage(LotsNestedMessage.B114)
+_sym_db.RegisterMessage(LotsNestedMessage.B115)
+_sym_db.RegisterMessage(LotsNestedMessage.B116)
+_sym_db.RegisterMessage(LotsNestedMessage.B117)
+_sym_db.RegisterMessage(LotsNestedMessage.B118)
+_sym_db.RegisterMessage(LotsNestedMessage.B119)
+_sym_db.RegisterMessage(LotsNestedMessage.B120)
+_sym_db.RegisterMessage(LotsNestedMessage.B121)
+_sym_db.RegisterMessage(LotsNestedMessage.B122)
+_sym_db.RegisterMessage(LotsNestedMessage.B123)
+_sym_db.RegisterMessage(LotsNestedMessage.B124)
+_sym_db.RegisterMessage(LotsNestedMessage.B125)
+_sym_db.RegisterMessage(LotsNestedMessage.B126)
+_sym_db.RegisterMessage(LotsNestedMessage.B127)
+_sym_db.RegisterMessage(LotsNestedMessage.B128)
+_sym_db.RegisterMessage(LotsNestedMessage.B129)
+_sym_db.RegisterMessage(LotsNestedMessage.B130)
+_sym_db.RegisterMessage(LotsNestedMessage.B131)
+_sym_db.RegisterMessage(LotsNestedMessage.B132)
+_sym_db.RegisterMessage(LotsNestedMessage.B133)
+_sym_db.RegisterMessage(LotsNestedMessage.B134)
+_sym_db.RegisterMessage(LotsNestedMessage.B135)
+_sym_db.RegisterMessage(LotsNestedMessage.B136)
+_sym_db.RegisterMessage(LotsNestedMessage.B137)
+_sym_db.RegisterMessage(LotsNestedMessage.B138)
+_sym_db.RegisterMessage(LotsNestedMessage.B139)
+_sym_db.RegisterMessage(LotsNestedMessage.B140)
+_sym_db.RegisterMessage(LotsNestedMessage.B141)
+_sym_db.RegisterMessage(LotsNestedMessage.B142)
+_sym_db.RegisterMessage(LotsNestedMessage.B143)
+_sym_db.RegisterMessage(LotsNestedMessage.B144)
+_sym_db.RegisterMessage(LotsNestedMessage.B145)
+_sym_db.RegisterMessage(LotsNestedMessage.B146)
+_sym_db.RegisterMessage(LotsNestedMessage.B147)
+_sym_db.RegisterMessage(LotsNestedMessage.B148)
+_sym_db.RegisterMessage(LotsNestedMessage.B149)
+_sym_db.RegisterMessage(LotsNestedMessage.B150)
+_sym_db.RegisterMessage(LotsNestedMessage.B151)
+_sym_db.RegisterMessage(LotsNestedMessage.B152)
+_sym_db.RegisterMessage(LotsNestedMessage.B153)
+_sym_db.RegisterMessage(LotsNestedMessage.B154)
+_sym_db.RegisterMessage(LotsNestedMessage.B155)
+_sym_db.RegisterMessage(LotsNestedMessage.B156)
+_sym_db.RegisterMessage(LotsNestedMessage.B157)
+_sym_db.RegisterMessage(LotsNestedMessage.B158)
+_sym_db.RegisterMessage(LotsNestedMessage.B159)
+_sym_db.RegisterMessage(LotsNestedMessage.B160)
+_sym_db.RegisterMessage(LotsNestedMessage.B161)
+_sym_db.RegisterMessage(LotsNestedMessage.B162)
+_sym_db.RegisterMessage(LotsNestedMessage.B163)
+_sym_db.RegisterMessage(LotsNestedMessage.B164)
+_sym_db.RegisterMessage(LotsNestedMessage.B165)
+_sym_db.RegisterMessage(LotsNestedMessage.B166)
+_sym_db.RegisterMessage(LotsNestedMessage.B167)
+_sym_db.RegisterMessage(LotsNestedMessage.B168)
+_sym_db.RegisterMessage(LotsNestedMessage.B169)
+_sym_db.RegisterMessage(LotsNestedMessage.B170)
+_sym_db.RegisterMessage(LotsNestedMessage.B171)
+_sym_db.RegisterMessage(LotsNestedMessage.B172)
+_sym_db.RegisterMessage(LotsNestedMessage.B173)
+_sym_db.RegisterMessage(LotsNestedMessage.B174)
+_sym_db.RegisterMessage(LotsNestedMessage.B175)
+_sym_db.RegisterMessage(LotsNestedMessage.B176)
+_sym_db.RegisterMessage(LotsNestedMessage.B177)
+_sym_db.RegisterMessage(LotsNestedMessage.B178)
+_sym_db.RegisterMessage(LotsNestedMessage.B179)
+_sym_db.RegisterMessage(LotsNestedMessage.B180)
+_sym_db.RegisterMessage(LotsNestedMessage.B181)
+_sym_db.RegisterMessage(LotsNestedMessage.B182)
+_sym_db.RegisterMessage(LotsNestedMessage.B183)
+_sym_db.RegisterMessage(LotsNestedMessage.B184)
+_sym_db.RegisterMessage(LotsNestedMessage.B185)
+_sym_db.RegisterMessage(LotsNestedMessage.B186)
+_sym_db.RegisterMessage(LotsNestedMessage.B187)
+_sym_db.RegisterMessage(LotsNestedMessage.B188)
+_sym_db.RegisterMessage(LotsNestedMessage.B189)
+_sym_db.RegisterMessage(LotsNestedMessage.B190)
+_sym_db.RegisterMessage(LotsNestedMessage.B191)
+_sym_db.RegisterMessage(LotsNestedMessage.B192)
+_sym_db.RegisterMessage(LotsNestedMessage.B193)
+_sym_db.RegisterMessage(LotsNestedMessage.B194)
+_sym_db.RegisterMessage(LotsNestedMessage.B195)
+_sym_db.RegisterMessage(LotsNestedMessage.B196)
+_sym_db.RegisterMessage(LotsNestedMessage.B197)
+_sym_db.RegisterMessage(LotsNestedMessage.B198)
+_sym_db.RegisterMessage(LotsNestedMessage.B199)
+_sym_db.RegisterMessage(LotsNestedMessage.B200)
+_sym_db.RegisterMessage(LotsNestedMessage.B201)
+_sym_db.RegisterMessage(LotsNestedMessage.B202)
+_sym_db.RegisterMessage(LotsNestedMessage.B203)
+_sym_db.RegisterMessage(LotsNestedMessage.B204)
+_sym_db.RegisterMessage(LotsNestedMessage.B205)
+_sym_db.RegisterMessage(LotsNestedMessage.B206)
+_sym_db.RegisterMessage(LotsNestedMessage.B207)
+_sym_db.RegisterMessage(LotsNestedMessage.B208)
+_sym_db.RegisterMessage(LotsNestedMessage.B209)
+_sym_db.RegisterMessage(LotsNestedMessage.B210)
+_sym_db.RegisterMessage(LotsNestedMessage.B211)
+_sym_db.RegisterMessage(LotsNestedMessage.B212)
+_sym_db.RegisterMessage(LotsNestedMessage.B213)
+_sym_db.RegisterMessage(LotsNestedMessage.B214)
+_sym_db.RegisterMessage(LotsNestedMessage.B215)
+_sym_db.RegisterMessage(LotsNestedMessage.B216)
+_sym_db.RegisterMessage(LotsNestedMessage.B217)
+_sym_db.RegisterMessage(LotsNestedMessage.B218)
+_sym_db.RegisterMessage(LotsNestedMessage.B219)
+_sym_db.RegisterMessage(LotsNestedMessage.B220)
+_sym_db.RegisterMessage(LotsNestedMessage.B221)
+_sym_db.RegisterMessage(LotsNestedMessage.B222)
+_sym_db.RegisterMessage(LotsNestedMessage.B223)
+_sym_db.RegisterMessage(LotsNestedMessage.B224)
+_sym_db.RegisterMessage(LotsNestedMessage.B225)
+_sym_db.RegisterMessage(LotsNestedMessage.B226)
+_sym_db.RegisterMessage(LotsNestedMessage.B227)
+_sym_db.RegisterMessage(LotsNestedMessage.B228)
+_sym_db.RegisterMessage(LotsNestedMessage.B229)
+_sym_db.RegisterMessage(LotsNestedMessage.B230)
+_sym_db.RegisterMessage(LotsNestedMessage.B231)
+_sym_db.RegisterMessage(LotsNestedMessage.B232)
+_sym_db.RegisterMessage(LotsNestedMessage.B233)
+_sym_db.RegisterMessage(LotsNestedMessage.B234)
+_sym_db.RegisterMessage(LotsNestedMessage.B235)
+_sym_db.RegisterMessage(LotsNestedMessage.B236)
+_sym_db.RegisterMessage(LotsNestedMessage.B237)
+_sym_db.RegisterMessage(LotsNestedMessage.B238)
+_sym_db.RegisterMessage(LotsNestedMessage.B239)
+_sym_db.RegisterMessage(LotsNestedMessage.B240)
+_sym_db.RegisterMessage(LotsNestedMessage.B241)
+_sym_db.RegisterMessage(LotsNestedMessage.B242)
+_sym_db.RegisterMessage(LotsNestedMessage.B243)
+_sym_db.RegisterMessage(LotsNestedMessage.B244)
+_sym_db.RegisterMessage(LotsNestedMessage.B245)
+_sym_db.RegisterMessage(LotsNestedMessage.B246)
+_sym_db.RegisterMessage(LotsNestedMessage.B247)
+_sym_db.RegisterMessage(LotsNestedMessage.B248)
+_sym_db.RegisterMessage(LotsNestedMessage.B249)
+_sym_db.RegisterMessage(LotsNestedMessage.B250)
+_sym_db.RegisterMessage(LotsNestedMessage.B251)
+_sym_db.RegisterMessage(LotsNestedMessage.B252)
+_sym_db.RegisterMessage(LotsNestedMessage.B253)
+_sym_db.RegisterMessage(LotsNestedMessage.B254)
+_sym_db.RegisterMessage(LotsNestedMessage.B255)
+
+OutOfOrderFields.RegisterExtension(optional_uint64)
+OutOfOrderFields.RegisterExtension(optional_int64)
+globals()['class'].RegisterExtension(globals()['continue'])
+getattr(globals()['class'], 'try').RegisterExtension(globals()['with'])
+globals()['class'].RegisterExtension(_EXTENDCLASS.extensions_by_name['return'])
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/no_package_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/no_package_pb2.py
new file mode 100644
index 0000000..84c9b10
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/no_package_pb2.py
@@ -0,0 +1,101 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/no_package.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/no_package.proto',
+  package='',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n)google/protobuf/internal/no_package.proto\";\n\x10NoPackageMessage\x12\'\n\x0fno_package_enum\x18\x01 \x01(\x0e\x32\x0e.NoPackageEnum*?\n\rNoPackageEnum\x12\x16\n\x12NO_PACKAGE_VALUE_0\x10\x00\x12\x16\n\x12NO_PACKAGE_VALUE_1\x10\x01'
+)
+
+_NOPACKAGEENUM = _descriptor.EnumDescriptor(
+  name='NoPackageEnum',
+  full_name='NoPackageEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='NO_PACKAGE_VALUE_0', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='NO_PACKAGE_VALUE_1', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=106,
+  serialized_end=169,
+)
+_sym_db.RegisterEnumDescriptor(_NOPACKAGEENUM)
+
+NoPackageEnum = enum_type_wrapper.EnumTypeWrapper(_NOPACKAGEENUM)
+NO_PACKAGE_VALUE_0 = 0
+NO_PACKAGE_VALUE_1 = 1
+
+
+
+_NOPACKAGEMESSAGE = _descriptor.Descriptor(
+  name='NoPackageMessage',
+  full_name='NoPackageMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='no_package_enum', full_name='NoPackageMessage.no_package_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=45,
+  serialized_end=104,
+)
+
+_NOPACKAGEMESSAGE.fields_by_name['no_package_enum'].enum_type = _NOPACKAGEENUM
+DESCRIPTOR.message_types_by_name['NoPackageMessage'] = _NOPACKAGEMESSAGE
+DESCRIPTOR.enum_types_by_name['NoPackageEnum'] = _NOPACKAGEENUM
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+NoPackageMessage = _reflection.GeneratedProtocolMessageType('NoPackageMessage', (_message.Message,), {
+  'DESCRIPTOR' : _NOPACKAGEMESSAGE,
+  '__module__' : 'google.protobuf.internal.no_package_pb2'
+  # @@protoc_insertion_point(class_scope:NoPackageMessage)
+  })
+_sym_db.RegisterMessage(NoPackageMessage)
+
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/packed_field_test_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/packed_field_test_pb2.py
new file mode 100644
index 0000000..8bc627d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/packed_field_test_pb2.py
@@ -0,0 +1,340 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/packed_field_test.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/packed_field_test.proto',
+  package='google.protobuf.python.internal',
+  syntax='proto3',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n0google/protobuf/internal/packed_field_test.proto\x12\x1fgoogle.protobuf.python.internal\"\xdb\x03\n\x0fTestPackedTypes\x12\x16\n\x0erepeated_int32\x18\x01 \x03(\x05\x12\x16\n\x0erepeated_int64\x18\x02 \x03(\x03\x12\x17\n\x0frepeated_uint32\x18\x03 \x03(\r\x12\x17\n\x0frepeated_uint64\x18\x04 \x03(\x04\x12\x17\n\x0frepeated_sint32\x18\x05 \x03(\x11\x12\x17\n\x0frepeated_sint64\x18\x06 \x03(\x12\x12\x18\n\x10repeated_fixed32\x18\x07 \x03(\x07\x12\x18\n\x10repeated_fixed64\x18\x08 \x03(\x06\x12\x19\n\x11repeated_sfixed32\x18\t \x03(\x0f\x12\x19\n\x11repeated_sfixed64\x18\n \x03(\x10\x12\x16\n\x0erepeated_float\x18\x0b \x03(\x02\x12\x17\n\x0frepeated_double\x18\x0c \x03(\x01\x12\x15\n\rrepeated_bool\x18\r \x03(\x08\x12Y\n\x14repeated_nested_enum\x18\x0e \x03(\x0e\x32;.google.protobuf.python.internal.TestPackedTypes.NestedEnum\"\'\n\nNestedEnum\x12\x07\n\x03\x46OO\x10\x00\x12\x07\n\x03\x42\x41R\x10\x01\x12\x07\n\x03\x42\x41Z\x10\x02\"\xec\x03\n\x11TestUnpackedTypes\x12\x1a\n\x0erepeated_int32\x18\x01 \x03(\x05\x42\x02\x10\x00\x12\x1a\n\x0erepeated_int64\x18\x02 \x03(\x03\x42\x02\x10\x00\x12\x1b\n\x0frepeated_uint32\x18\x03 \x03(\rB\x02\x10\x00\x12\x1b\n\x0frepeated_uint64\x18\x04 \x03(\x04\x42\x02\x10\x00\x12\x1b\n\x0frepeated_sint32\x18\x05 \x03(\x11\x42\x02\x10\x00\x12\x1b\n\x0frepeated_sint64\x18\x06 \x03(\x12\x42\x02\x10\x00\x12\x1c\n\x10repeated_fixed32\x18\x07 \x03(\x07\x42\x02\x10\x00\x12\x1c\n\x10repeated_fixed64\x18\x08 \x03(\x06\x42\x02\x10\x00\x12\x1d\n\x11repeated_sfixed32\x18\t \x03(\x0f\x42\x02\x10\x00\x12\x1d\n\x11repeated_sfixed64\x18\n \x03(\x10\x42\x02\x10\x00\x12\x1a\n\x0erepeated_float\x18\x0b \x03(\x02\x42\x02\x10\x00\x12\x1b\n\x0frepeated_double\x18\x0c \x03(\x01\x42\x02\x10\x00\x12\x19\n\rrepeated_bool\x18\r \x03(\x08\x42\x02\x10\x00\x12]\n\x14repeated_nested_enum\x18\x0e \x03(\x0e\x32;.google.protobuf.python.internal.TestPackedTypes.NestedEnumB\x02\x10\x00\x62\x06proto3'
+)
+
+
+
+_TESTPACKEDTYPES_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.TestPackedTypes.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAZ', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=522,
+  serialized_end=561,
+)
+_sym_db.RegisterEnumDescriptor(_TESTPACKEDTYPES_NESTEDENUM)
+
+
+_TESTPACKEDTYPES = _descriptor.Descriptor(
+  name='TestPackedTypes',
+  full_name='google.protobuf.python.internal.TestPackedTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='repeated_int32', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_int32', index=0,
+      number=1, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_int64', index=1,
+      number=2, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint32', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_uint32', index=2,
+      number=3, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint64', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_uint64', index=3,
+      number=4, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint32', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_sint32', index=4,
+      number=5, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint64', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_sint64', index=5,
+      number=6, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed32', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_fixed32', index=6,
+      number=7, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed64', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_fixed64', index=7,
+      number=8, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed32', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_sfixed32', index=8,
+      number=9, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed64', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_sfixed64', index=9,
+      number=10, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_float', index=10,
+      number=11, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_double', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_double', index=11,
+      number=12, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bool', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_bool', index=12,
+      number=13, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_enum', full_name='google.protobuf.python.internal.TestPackedTypes.repeated_nested_enum', index=13,
+      number=14, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _TESTPACKEDTYPES_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=86,
+  serialized_end=561,
+)
+
+
+_TESTUNPACKEDTYPES = _descriptor.Descriptor(
+  name='TestUnpackedTypes',
+  full_name='google.protobuf.python.internal.TestUnpackedTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='repeated_int32', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_int32', index=0,
+      number=1, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_int64', index=1,
+      number=2, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint32', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_uint32', index=2,
+      number=3, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint64', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_uint64', index=3,
+      number=4, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint32', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_sint32', index=4,
+      number=5, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint64', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_sint64', index=5,
+      number=6, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed32', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_fixed32', index=6,
+      number=7, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed64', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_fixed64', index=7,
+      number=8, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed32', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_sfixed32', index=8,
+      number=9, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed64', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_sfixed64', index=9,
+      number=10, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_float', index=10,
+      number=11, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_double', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_double', index=11,
+      number=12, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bool', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_bool', index=12,
+      number=13, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_enum', full_name='google.protobuf.python.internal.TestUnpackedTypes.repeated_nested_enum', index=13,
+      number=14, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=564,
+  serialized_end=1056,
+)
+
+_TESTPACKEDTYPES.fields_by_name['repeated_nested_enum'].enum_type = _TESTPACKEDTYPES_NESTEDENUM
+_TESTPACKEDTYPES_NESTEDENUM.containing_type = _TESTPACKEDTYPES
+_TESTUNPACKEDTYPES.fields_by_name['repeated_nested_enum'].enum_type = _TESTPACKEDTYPES_NESTEDENUM
+DESCRIPTOR.message_types_by_name['TestPackedTypes'] = _TESTPACKEDTYPES
+DESCRIPTOR.message_types_by_name['TestUnpackedTypes'] = _TESTUNPACKEDTYPES
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestPackedTypes = _reflection.GeneratedProtocolMessageType('TestPackedTypes', (_message.Message,), {
+  'DESCRIPTOR' : _TESTPACKEDTYPES,
+  '__module__' : 'google.protobuf.internal.packed_field_test_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.TestPackedTypes)
+  })
+_sym_db.RegisterMessage(TestPackedTypes)
+
+TestUnpackedTypes = _reflection.GeneratedProtocolMessageType('TestUnpackedTypes', (_message.Message,), {
+  'DESCRIPTOR' : _TESTUNPACKEDTYPES,
+  '__module__' : 'google.protobuf.internal.packed_field_test_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.TestUnpackedTypes)
+  })
+_sym_db.RegisterMessage(TestUnpackedTypes)
+
+
+_TESTUNPACKEDTYPES.fields_by_name['repeated_int32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_int64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_uint32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_uint64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_sint32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_sint64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_fixed32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_fixed64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_sfixed32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_sfixed64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_float']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_double']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_bool']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_nested_enum']._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/proto_builder_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/proto_builder_test.py
new file mode 100644
index 0000000..36dfbfd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/proto_builder_test.py
@@ -0,0 +1,96 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests for google.protobuf.proto_builder."""
+
+try:
+    from collections import OrderedDict
+except ImportError:
+    from ordereddict import OrderedDict  #PY26
+try:
+  import unittest2 as unittest
+except ImportError:
+  import unittest
+
+from google.protobuf import descriptor_pb2
+from google.protobuf import descriptor_pool
+from google.protobuf import proto_builder
+from google.protobuf import text_format
+
+
+class ProtoBuilderTest(unittest.TestCase):
+
+  def setUp(self):
+    self.ordered_fields = OrderedDict([
+        ('foo', descriptor_pb2.FieldDescriptorProto.TYPE_INT64),
+        ('bar', descriptor_pb2.FieldDescriptorProto.TYPE_STRING),
+        ])
+    self._fields = dict(self.ordered_fields)
+
+  def testMakeSimpleProtoClass(self):
+    """Test that we can create a proto class."""
+    proto_cls = proto_builder.MakeSimpleProtoClass(
+        self._fields,
+        full_name='net.proto2.python.public.proto_builder_test.Test')
+    proto = proto_cls()
+    proto.foo = 12345
+    proto.bar = 'asdf'
+    self.assertMultiLineEqual(
+        'bar: "asdf"\nfoo: 12345\n', text_format.MessageToString(proto))
+
+  def testOrderedFields(self):
+    """Test that the field order is maintained when given an OrderedDict."""
+    proto_cls = proto_builder.MakeSimpleProtoClass(
+        self.ordered_fields,
+        full_name='net.proto2.python.public.proto_builder_test.OrderedTest')
+    proto = proto_cls()
+    proto.foo = 12345
+    proto.bar = 'asdf'
+    self.assertMultiLineEqual(
+        'foo: 12345\nbar: "asdf"\n', text_format.MessageToString(proto))
+
+  def testMakeSameProtoClassTwice(self):
+    """Test that the DescriptorPool is used."""
+    pool = descriptor_pool.DescriptorPool()
+    proto_cls1 = proto_builder.MakeSimpleProtoClass(
+        self._fields,
+        full_name='net.proto2.python.public.proto_builder_test.Test',
+        pool=pool)
+    proto_cls2 = proto_builder.MakeSimpleProtoClass(
+        self._fields,
+        full_name='net.proto2.python.public.proto_builder_test.Test',
+        pool=pool)
+    self.assertIs(proto_cls1.DESCRIPTOR, proto_cls2.DESCRIPTOR)
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/python_message.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/python_message.py
new file mode 100644
index 0000000..d1f4dcd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/python_message.py
@@ -0,0 +1,1547 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# This code is meant to work on Python 2.4 and above only.
+#
+# TODO(robinson): Helpers for verbose, common checks like seeing if a
+# descriptor's cpp_type is CPPTYPE_MESSAGE.
+
+"""Contains a metaclass and helper functions used to create
+protocol message classes from Descriptor objects at runtime.
+
+Recall that a metaclass is the "type" of a class.
+(A class is to a metaclass what an instance is to a class.)
+
+In this case, we use the GeneratedProtocolMessageType metaclass
+to inject all the useful functionality into the classes
+output by the protocol compiler at compile-time.
+
+The upshot of all this is that the real implementation
+details for ALL pure-Python protocol buffers are *here in
+this file*.
+"""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+from io import BytesIO
+import struct
+import sys
+import weakref
+
+import six
+from six.moves import range
+
+# We use "as" to avoid name collisions with variables.
+from google.protobuf.internal import api_implementation
+from google.protobuf.internal import containers
+from google.protobuf.internal import decoder
+from google.protobuf.internal import encoder
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf.internal import extension_dict
+from google.protobuf.internal import message_listener as message_listener_mod
+from google.protobuf.internal import type_checkers
+from google.protobuf.internal import well_known_types
+from google.protobuf.internal import wire_format
+from google.protobuf import descriptor as descriptor_mod
+from google.protobuf import message as message_mod
+from google.protobuf import text_format
+
+_FieldDescriptor = descriptor_mod.FieldDescriptor
+_AnyFullTypeName = 'google.protobuf.Any'
+_ExtensionDict = extension_dict._ExtensionDict
+
+class GeneratedProtocolMessageType(type):
+
+  """Metaclass for protocol message classes created at runtime from Descriptors.
+
+  We add implementations for all methods described in the Message class.  We
+  also create properties to allow getting/setting all fields in the protocol
+  message.  Finally, we create slots to prevent users from accidentally
+  "setting" nonexistent fields in the protocol message, which then wouldn't get
+  serialized / deserialized properly.
+
+  The protocol compiler currently uses this metaclass to create protocol
+  message classes at runtime.  Clients can also manually create their own
+  classes at runtime, as in this example:
+
+  mydescriptor = Descriptor(.....)
+  factory = symbol_database.Default()
+  factory.pool.AddDescriptor(mydescriptor)
+  MyProtoClass = factory.GetPrototype(mydescriptor)
+  myproto_instance = MyProtoClass()
+  myproto.foo_field = 23
+  ...
+  """
+
+  # Must be consistent with the protocol-compiler code in
+  # proto2/compiler/internal/generator.*.
+  _DESCRIPTOR_KEY = 'DESCRIPTOR'
+
+  def __new__(cls, name, bases, dictionary):
+    """Custom allocation for runtime-generated class types.
+
+    We override __new__ because this is apparently the only place
+    where we can meaningfully set __slots__ on the class we're creating(?).
+    (The interplay between metaclasses and slots is not very well-documented).
+
+    Args:
+      name: Name of the class (ignored, but required by the
+        metaclass protocol).
+      bases: Base classes of the class we're constructing.
+        (Should be message.Message).  We ignore this field, but
+        it's required by the metaclass protocol
+      dictionary: The class dictionary of the class we're
+        constructing.  dictionary[_DESCRIPTOR_KEY] must contain
+        a Descriptor object describing this protocol message
+        type.
+
+    Returns:
+      Newly-allocated class.
+
+    Raises:
+      RuntimeError: Generated code only work with python cpp extension.
+    """
+    descriptor = dictionary[GeneratedProtocolMessageType._DESCRIPTOR_KEY]
+
+    if isinstance(descriptor, str):
+      raise RuntimeError('The generated code only work with python cpp '
+                         'extension, but it is using pure python runtime.')
+
+    # If a concrete class already exists for this descriptor, don't try to
+    # create another.  Doing so will break any messages that already exist with
+    # the existing class.
+    #
+    # The C++ implementation appears to have its own internal `PyMessageFactory`
+    # to achieve similar results.
+    #
+    # This most commonly happens in `text_format.py` when using descriptors from
+    # a custom pool; it calls symbol_database.Global().getPrototype() on a
+    # descriptor which already has an existing concrete class.
+    new_class = getattr(descriptor, '_concrete_class', None)
+    if new_class:
+      return new_class
+
+    if descriptor.full_name in well_known_types.WKTBASES:
+      bases += (well_known_types.WKTBASES[descriptor.full_name],)
+    _AddClassAttributesForNestedExtensions(descriptor, dictionary)
+    _AddSlots(descriptor, dictionary)
+
+    superclass = super(GeneratedProtocolMessageType, cls)
+    new_class = superclass.__new__(cls, name, bases, dictionary)
+    return new_class
+
+  def __init__(cls, name, bases, dictionary):
+    """Here we perform the majority of our work on the class.
+    We add enum getters, an __init__ method, implementations
+    of all Message methods, and properties for all fields
+    in the protocol type.
+
+    Args:
+      name: Name of the class (ignored, but required by the
+        metaclass protocol).
+      bases: Base classes of the class we're constructing.
+        (Should be message.Message).  We ignore this field, but
+        it's required by the metaclass protocol
+      dictionary: The class dictionary of the class we're
+        constructing.  dictionary[_DESCRIPTOR_KEY] must contain
+        a Descriptor object describing this protocol message
+        type.
+    """
+    descriptor = dictionary[GeneratedProtocolMessageType._DESCRIPTOR_KEY]
+
+    # If this is an _existing_ class looked up via `_concrete_class` in the
+    # __new__ method above, then we don't need to re-initialize anything.
+    existing_class = getattr(descriptor, '_concrete_class', None)
+    if existing_class:
+      assert existing_class is cls, (
+          'Duplicate `GeneratedProtocolMessageType` created for descriptor %r'
+          % (descriptor.full_name))
+      return
+
+    cls._decoders_by_tag = {}
+    if (descriptor.has_options and
+        descriptor.GetOptions().message_set_wire_format):
+      cls._decoders_by_tag[decoder.MESSAGE_SET_ITEM_TAG] = (
+          decoder.MessageSetItemDecoder(descriptor), None)
+
+    # Attach stuff to each FieldDescriptor for quick lookup later on.
+    for field in descriptor.fields:
+      _AttachFieldHelpers(cls, field)
+
+    descriptor._concrete_class = cls  # pylint: disable=protected-access
+    _AddEnumValues(descriptor, cls)
+    _AddInitMethod(descriptor, cls)
+    _AddPropertiesForFields(descriptor, cls)
+    _AddPropertiesForExtensions(descriptor, cls)
+    _AddStaticMethods(cls)
+    _AddMessageMethods(descriptor, cls)
+    _AddPrivateHelperMethods(descriptor, cls)
+
+    superclass = super(GeneratedProtocolMessageType, cls)
+    superclass.__init__(name, bases, dictionary)
+
+
+# Stateless helpers for GeneratedProtocolMessageType below.
+# Outside clients should not access these directly.
+#
+# I opted not to make any of these methods on the metaclass, to make it more
+# clear that I'm not really using any state there and to keep clients from
+# thinking that they have direct access to these construction helpers.
+
+
+def _PropertyName(proto_field_name):
+  """Returns the name of the public property attribute which
+  clients can use to get and (in some cases) set the value
+  of a protocol message field.
+
+  Args:
+    proto_field_name: The protocol message field name, exactly
+      as it appears (or would appear) in a .proto file.
+  """
+  # TODO(robinson): Escape Python keywords (e.g., yield), and test this support.
+  # nnorwitz makes my day by writing:
+  # """
+  # FYI.  See the keyword module in the stdlib. This could be as simple as:
+  #
+  # if keyword.iskeyword(proto_field_name):
+  #   return proto_field_name + "_"
+  # return proto_field_name
+  # """
+  # Kenton says:  The above is a BAD IDEA.  People rely on being able to use
+  #   getattr() and setattr() to reflectively manipulate field values.  If we
+  #   rename the properties, then every such user has to also make sure to apply
+  #   the same transformation.  Note that currently if you name a field "yield",
+  #   you can still access it just fine using getattr/setattr -- it's not even
+  #   that cumbersome to do so.
+  # TODO(kenton):  Remove this method entirely if/when everyone agrees with my
+  #   position.
+  return proto_field_name
+
+
+def _AddSlots(message_descriptor, dictionary):
+  """Adds a __slots__ entry to dictionary, containing the names of all valid
+  attributes for this message type.
+
+  Args:
+    message_descriptor: A Descriptor instance describing this message type.
+    dictionary: Class dictionary to which we'll add a '__slots__' entry.
+  """
+  dictionary['__slots__'] = ['_cached_byte_size',
+                             '_cached_byte_size_dirty',
+                             '_fields',
+                             '_unknown_fields',
+                             '_unknown_field_set',
+                             '_is_present_in_parent',
+                             '_listener',
+                             '_listener_for_children',
+                             '__weakref__',
+                             '_oneofs']
+
+
+def _IsMessageSetExtension(field):
+  return (field.is_extension and
+          field.containing_type.has_options and
+          field.containing_type.GetOptions().message_set_wire_format and
+          field.type == _FieldDescriptor.TYPE_MESSAGE and
+          field.label == _FieldDescriptor.LABEL_OPTIONAL)
+
+
+def _IsMapField(field):
+  return (field.type == _FieldDescriptor.TYPE_MESSAGE and
+          field.message_type.has_options and
+          field.message_type.GetOptions().map_entry)
+
+
+def _IsMessageMapField(field):
+  value_type = field.message_type.fields_by_name['value']
+  return value_type.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE
+
+
+def _IsStrictUtf8Check(field):
+  if field.containing_type.syntax != 'proto3':
+    return False
+  enforce_utf8 = True
+  return enforce_utf8
+
+
+def _AttachFieldHelpers(cls, field_descriptor):
+  is_repeated = (field_descriptor.label == _FieldDescriptor.LABEL_REPEATED)
+  is_packable = (is_repeated and
+                 wire_format.IsTypePackable(field_descriptor.type))
+  is_proto3 = field_descriptor.containing_type.syntax == 'proto3'
+  if not is_packable:
+    is_packed = False
+  elif field_descriptor.containing_type.syntax == 'proto2':
+    is_packed = (field_descriptor.has_options and
+                field_descriptor.GetOptions().packed)
+  else:
+    has_packed_false = (field_descriptor.has_options and
+                        field_descriptor.GetOptions().HasField('packed') and
+                        field_descriptor.GetOptions().packed == False)
+    is_packed = not has_packed_false
+  is_map_entry = _IsMapField(field_descriptor)
+
+  if is_map_entry:
+    field_encoder = encoder.MapEncoder(field_descriptor)
+    sizer = encoder.MapSizer(field_descriptor,
+                             _IsMessageMapField(field_descriptor))
+  elif _IsMessageSetExtension(field_descriptor):
+    field_encoder = encoder.MessageSetItemEncoder(field_descriptor.number)
+    sizer = encoder.MessageSetItemSizer(field_descriptor.number)
+  else:
+    field_encoder = type_checkers.TYPE_TO_ENCODER[field_descriptor.type](
+        field_descriptor.number, is_repeated, is_packed)
+    sizer = type_checkers.TYPE_TO_SIZER[field_descriptor.type](
+        field_descriptor.number, is_repeated, is_packed)
+
+  field_descriptor._encoder = field_encoder
+  field_descriptor._sizer = sizer
+  field_descriptor._default_constructor = _DefaultValueConstructorForField(
+      field_descriptor)
+
+  def AddDecoder(wiretype, is_packed):
+    tag_bytes = encoder.TagBytes(field_descriptor.number, wiretype)
+    decode_type = field_descriptor.type
+    if (decode_type == _FieldDescriptor.TYPE_ENUM and
+        type_checkers.SupportsOpenEnums(field_descriptor)):
+      decode_type = _FieldDescriptor.TYPE_INT32
+
+    oneof_descriptor = None
+    clear_if_default = False
+    if field_descriptor.containing_oneof is not None:
+      oneof_descriptor = field_descriptor
+    elif (is_proto3 and not is_repeated and
+          field_descriptor.cpp_type != _FieldDescriptor.CPPTYPE_MESSAGE):
+      clear_if_default = True
+
+    if is_map_entry:
+      is_message_map = _IsMessageMapField(field_descriptor)
+
+      field_decoder = decoder.MapDecoder(
+          field_descriptor, _GetInitializeDefaultForMap(field_descriptor),
+          is_message_map)
+    elif decode_type == _FieldDescriptor.TYPE_STRING:
+      is_strict_utf8_check = _IsStrictUtf8Check(field_descriptor)
+      field_decoder = decoder.StringDecoder(
+          field_descriptor.number, is_repeated, is_packed,
+          field_descriptor, field_descriptor._default_constructor,
+          is_strict_utf8_check, clear_if_default)
+    elif field_descriptor.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+      field_decoder = type_checkers.TYPE_TO_DECODER[decode_type](
+          field_descriptor.number, is_repeated, is_packed,
+          field_descriptor, field_descriptor._default_constructor)
+    else:
+      field_decoder = type_checkers.TYPE_TO_DECODER[decode_type](
+          field_descriptor.number, is_repeated, is_packed,
+          # pylint: disable=protected-access
+          field_descriptor, field_descriptor._default_constructor,
+          clear_if_default)
+
+    cls._decoders_by_tag[tag_bytes] = (field_decoder, oneof_descriptor)
+
+  AddDecoder(type_checkers.FIELD_TYPE_TO_WIRE_TYPE[field_descriptor.type],
+             False)
+
+  if is_repeated and wire_format.IsTypePackable(field_descriptor.type):
+    # To support wire compatibility of adding packed = true, add a decoder for
+    # packed values regardless of the field's options.
+    AddDecoder(wire_format.WIRETYPE_LENGTH_DELIMITED, True)
+
+
+def _AddClassAttributesForNestedExtensions(descriptor, dictionary):
+  extensions = descriptor.extensions_by_name
+  for extension_name, extension_field in extensions.items():
+    assert extension_name not in dictionary
+    dictionary[extension_name] = extension_field
+
+
+def _AddEnumValues(descriptor, cls):
+  """Sets class-level attributes for all enum fields defined in this message.
+
+  Also exporting a class-level object that can name enum values.
+
+  Args:
+    descriptor: Descriptor object for this message type.
+    cls: Class we're constructing for this message type.
+  """
+  for enum_type in descriptor.enum_types:
+    setattr(cls, enum_type.name, enum_type_wrapper.EnumTypeWrapper(enum_type))
+    for enum_value in enum_type.values:
+      setattr(cls, enum_value.name, enum_value.number)
+
+
+def _GetInitializeDefaultForMap(field):
+  if field.label != _FieldDescriptor.LABEL_REPEATED:
+    raise ValueError('map_entry set on non-repeated field %s' % (
+        field.name))
+  fields_by_name = field.message_type.fields_by_name
+  key_checker = type_checkers.GetTypeChecker(fields_by_name['key'])
+
+  value_field = fields_by_name['value']
+  if _IsMessageMapField(field):
+    def MakeMessageMapDefault(message):
+      return containers.MessageMap(
+          message._listener_for_children, value_field.message_type, key_checker,
+          field.message_type)
+    return MakeMessageMapDefault
+  else:
+    value_checker = type_checkers.GetTypeChecker(value_field)
+    def MakePrimitiveMapDefault(message):
+      return containers.ScalarMap(
+          message._listener_for_children, key_checker, value_checker,
+          field.message_type)
+    return MakePrimitiveMapDefault
+
+def _DefaultValueConstructorForField(field):
+  """Returns a function which returns a default value for a field.
+
+  Args:
+    field: FieldDescriptor object for this field.
+
+  The returned function has one argument:
+    message: Message instance containing this field, or a weakref proxy
+      of same.
+
+  That function in turn returns a default value for this field.  The default
+    value may refer back to |message| via a weak reference.
+  """
+
+  if _IsMapField(field):
+    return _GetInitializeDefaultForMap(field)
+
+  if field.label == _FieldDescriptor.LABEL_REPEATED:
+    if field.has_default_value and field.default_value != []:
+      raise ValueError('Repeated field default value not empty list: %s' % (
+          field.default_value))
+    if field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+      # We can't look at _concrete_class yet since it might not have
+      # been set.  (Depends on order in which we initialize the classes).
+      message_type = field.message_type
+      def MakeRepeatedMessageDefault(message):
+        return containers.RepeatedCompositeFieldContainer(
+            message._listener_for_children, field.message_type)
+      return MakeRepeatedMessageDefault
+    else:
+      type_checker = type_checkers.GetTypeChecker(field)
+      def MakeRepeatedScalarDefault(message):
+        return containers.RepeatedScalarFieldContainer(
+            message._listener_for_children, type_checker)
+      return MakeRepeatedScalarDefault
+
+  if field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+    # _concrete_class may not yet be initialized.
+    message_type = field.message_type
+    def MakeSubMessageDefault(message):
+      assert getattr(message_type, '_concrete_class', None), (
+          'Uninitialized concrete class found for field %r (message type %r)'
+          % (field.full_name, message_type.full_name))
+      result = message_type._concrete_class()
+      result._SetListener(
+          _OneofListener(message, field)
+          if field.containing_oneof is not None
+          else message._listener_for_children)
+      return result
+    return MakeSubMessageDefault
+
+  def MakeScalarDefault(message):
+    # TODO(protobuf-team): This may be broken since there may not be
+    # default_value.  Combine with has_default_value somehow.
+    return field.default_value
+  return MakeScalarDefault
+
+
+def _ReraiseTypeErrorWithFieldName(message_name, field_name):
+  """Re-raise the currently-handled TypeError with the field name added."""
+  exc = sys.exc_info()[1]
+  if len(exc.args) == 1 and type(exc) is TypeError:
+    # simple TypeError; add field name to exception message
+    exc = TypeError('%s for field %s.%s' % (str(exc), message_name, field_name))
+
+  # re-raise possibly-amended exception with original traceback:
+  six.reraise(type(exc), exc, sys.exc_info()[2])
+
+
+def _AddInitMethod(message_descriptor, cls):
+  """Adds an __init__ method to cls."""
+
+  def _GetIntegerEnumValue(enum_type, value):
+    """Convert a string or integer enum value to an integer.
+
+    If the value is a string, it is converted to the enum value in
+    enum_type with the same name.  If the value is not a string, it's
+    returned as-is.  (No conversion or bounds-checking is done.)
+    """
+    if isinstance(value, six.string_types):
+      try:
+        return enum_type.values_by_name[value].number
+      except KeyError:
+        raise ValueError('Enum type %s: unknown label "%s"' % (
+            enum_type.full_name, value))
+    return value
+
+  def init(self, **kwargs):
+    self._cached_byte_size = 0
+    self._cached_byte_size_dirty = len(kwargs) > 0
+    self._fields = {}
+    # Contains a mapping from oneof field descriptors to the descriptor
+    # of the currently set field in that oneof field.
+    self._oneofs = {}
+
+    # _unknown_fields is () when empty for efficiency, and will be turned into
+    # a list if fields are added.
+    self._unknown_fields = ()
+    # _unknown_field_set is None when empty for efficiency, and will be
+    # turned into UnknownFieldSet struct if fields are added.
+    self._unknown_field_set = None      # pylint: disable=protected-access
+    self._is_present_in_parent = False
+    self._listener = message_listener_mod.NullMessageListener()
+    self._listener_for_children = _Listener(self)
+    for field_name, field_value in kwargs.items():
+      field = _GetFieldByName(message_descriptor, field_name)
+      if field is None:
+        raise TypeError('%s() got an unexpected keyword argument "%s"' %
+                        (message_descriptor.name, field_name))
+      if field_value is None:
+        # field=None is the same as no field at all.
+        continue
+      if field.label == _FieldDescriptor.LABEL_REPEATED:
+        copy = field._default_constructor(self)
+        if field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:  # Composite
+          if _IsMapField(field):
+            if _IsMessageMapField(field):
+              for key in field_value:
+                copy[key].MergeFrom(field_value[key])
+            else:
+              copy.update(field_value)
+          else:
+            for val in field_value:
+              if isinstance(val, dict):
+                copy.add(**val)
+              else:
+                copy.add().MergeFrom(val)
+        else:  # Scalar
+          if field.cpp_type == _FieldDescriptor.CPPTYPE_ENUM:
+            field_value = [_GetIntegerEnumValue(field.enum_type, val)
+                           for val in field_value]
+          copy.extend(field_value)
+        self._fields[field] = copy
+      elif field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+        copy = field._default_constructor(self)
+        new_val = field_value
+        if isinstance(field_value, dict):
+          new_val = field.message_type._concrete_class(**field_value)
+        try:
+          copy.MergeFrom(new_val)
+        except TypeError:
+          _ReraiseTypeErrorWithFieldName(message_descriptor.name, field_name)
+        self._fields[field] = copy
+      else:
+        if field.cpp_type == _FieldDescriptor.CPPTYPE_ENUM:
+          field_value = _GetIntegerEnumValue(field.enum_type, field_value)
+        try:
+          setattr(self, field_name, field_value)
+        except TypeError:
+          _ReraiseTypeErrorWithFieldName(message_descriptor.name, field_name)
+
+  init.__module__ = None
+  init.__doc__ = None
+  cls.__init__ = init
+
+
+def _GetFieldByName(message_descriptor, field_name):
+  """Returns a field descriptor by field name.
+
+  Args:
+    message_descriptor: A Descriptor describing all fields in message.
+    field_name: The name of the field to retrieve.
+  Returns:
+    The field descriptor associated with the field name.
+  """
+  try:
+    return message_descriptor.fields_by_name[field_name]
+  except KeyError:
+    raise ValueError('Protocol message %s has no "%s" field.' %
+                     (message_descriptor.name, field_name))
+
+
+def _AddPropertiesForFields(descriptor, cls):
+  """Adds properties for all fields in this protocol message type."""
+  for field in descriptor.fields:
+    _AddPropertiesForField(field, cls)
+
+  if descriptor.is_extendable:
+    # _ExtensionDict is just an adaptor with no state so we allocate a new one
+    # every time it is accessed.
+    cls.Extensions = property(lambda self: _ExtensionDict(self))
+
+
+def _AddPropertiesForField(field, cls):
+  """Adds a public property for a protocol message field.
+  Clients can use this property to get and (in the case
+  of non-repeated scalar fields) directly set the value
+  of a protocol message field.
+
+  Args:
+    field: A FieldDescriptor for this field.
+    cls: The class we're constructing.
+  """
+  # Catch it if we add other types that we should
+  # handle specially here.
+  assert _FieldDescriptor.MAX_CPPTYPE == 10
+
+  constant_name = field.name.upper() + '_FIELD_NUMBER'
+  setattr(cls, constant_name, field.number)
+
+  if field.label == _FieldDescriptor.LABEL_REPEATED:
+    _AddPropertiesForRepeatedField(field, cls)
+  elif field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+    _AddPropertiesForNonRepeatedCompositeField(field, cls)
+  else:
+    _AddPropertiesForNonRepeatedScalarField(field, cls)
+
+
+class _FieldProperty(property):
+  __slots__ = ('DESCRIPTOR',)
+
+  def __init__(self, descriptor, getter, setter, doc):
+    property.__init__(self, getter, setter, doc=doc)
+    self.DESCRIPTOR = descriptor
+
+
+def _AddPropertiesForRepeatedField(field, cls):
+  """Adds a public property for a "repeated" protocol message field.  Clients
+  can use this property to get the value of the field, which will be either a
+  RepeatedScalarFieldContainer or RepeatedCompositeFieldContainer (see
+  below).
+
+  Note that when clients add values to these containers, we perform
+  type-checking in the case of repeated scalar fields, and we also set any
+  necessary "has" bits as a side-effect.
+
+  Args:
+    field: A FieldDescriptor for this field.
+    cls: The class we're constructing.
+  """
+  proto_field_name = field.name
+  property_name = _PropertyName(proto_field_name)
+
+  def getter(self):
+    field_value = self._fields.get(field)
+    if field_value is None:
+      # Construct a new object to represent this field.
+      field_value = field._default_constructor(self)
+
+      # Atomically check if another thread has preempted us and, if not, swap
+      # in the new object we just created.  If someone has preempted us, we
+      # take that object and discard ours.
+      # WARNING:  We are relying on setdefault() being atomic.  This is true
+      #   in CPython but we haven't investigated others.  This warning appears
+      #   in several other locations in this file.
+      field_value = self._fields.setdefault(field, field_value)
+    return field_value
+  getter.__module__ = None
+  getter.__doc__ = 'Getter for %s.' % proto_field_name
+
+  # We define a setter just so we can throw an exception with a more
+  # helpful error message.
+  def setter(self, new_value):
+    raise AttributeError('Assignment not allowed to repeated field '
+                         '"%s" in protocol message object.' % proto_field_name)
+
+  doc = 'Magic attribute generated for "%s" proto field.' % proto_field_name
+  setattr(cls, property_name, _FieldProperty(field, getter, setter, doc=doc))
+
+
+def _AddPropertiesForNonRepeatedScalarField(field, cls):
+  """Adds a public property for a nonrepeated, scalar protocol message field.
+  Clients can use this property to get and directly set the value of the field.
+  Note that when the client sets the value of a field by using this property,
+  all necessary "has" bits are set as a side-effect, and we also perform
+  type-checking.
+
+  Args:
+    field: A FieldDescriptor for this field.
+    cls: The class we're constructing.
+  """
+  proto_field_name = field.name
+  property_name = _PropertyName(proto_field_name)
+  type_checker = type_checkers.GetTypeChecker(field)
+  default_value = field.default_value
+  is_proto3 = field.containing_type.syntax == 'proto3'
+
+  def getter(self):
+    # TODO(protobuf-team): This may be broken since there may not be
+    # default_value.  Combine with has_default_value somehow.
+    return self._fields.get(field, default_value)
+  getter.__module__ = None
+  getter.__doc__ = 'Getter for %s.' % proto_field_name
+
+  clear_when_set_to_default = is_proto3 and not field.containing_oneof
+
+  def field_setter(self, new_value):
+    # pylint: disable=protected-access
+    # Testing the value for truthiness captures all of the proto3 defaults
+    # (0, 0.0, enum 0, and False).
+    try:
+      new_value = type_checker.CheckValue(new_value)
+    except TypeError as e:
+      raise TypeError(
+          'Cannot set %s to %.1024r: %s' % (field.full_name, new_value, e))
+    if clear_when_set_to_default and not new_value:
+      self._fields.pop(field, None)
+    else:
+      self._fields[field] = new_value
+    # Check _cached_byte_size_dirty inline to improve performance, since scalar
+    # setters are called frequently.
+    if not self._cached_byte_size_dirty:
+      self._Modified()
+
+  if field.containing_oneof:
+    def setter(self, new_value):
+      field_setter(self, new_value)
+      self._UpdateOneofState(field)
+  else:
+    setter = field_setter
+
+  setter.__module__ = None
+  setter.__doc__ = 'Setter for %s.' % proto_field_name
+
+  # Add a property to encapsulate the getter/setter.
+  doc = 'Magic attribute generated for "%s" proto field.' % proto_field_name
+  setattr(cls, property_name, _FieldProperty(field, getter, setter, doc=doc))
+
+
+def _AddPropertiesForNonRepeatedCompositeField(field, cls):
+  """Adds a public property for a nonrepeated, composite protocol message field.
+  A composite field is a "group" or "message" field.
+
+  Clients can use this property to get the value of the field, but cannot
+  assign to the property directly.
+
+  Args:
+    field: A FieldDescriptor for this field.
+    cls: The class we're constructing.
+  """
+  # TODO(robinson): Remove duplication with similar method
+  # for non-repeated scalars.
+  proto_field_name = field.name
+  property_name = _PropertyName(proto_field_name)
+
+  def getter(self):
+    field_value = self._fields.get(field)
+    if field_value is None:
+      # Construct a new object to represent this field.
+      field_value = field._default_constructor(self)
+
+      # Atomically check if another thread has preempted us and, if not, swap
+      # in the new object we just created.  If someone has preempted us, we
+      # take that object and discard ours.
+      # WARNING:  We are relying on setdefault() being atomic.  This is true
+      #   in CPython but we haven't investigated others.  This warning appears
+      #   in several other locations in this file.
+      field_value = self._fields.setdefault(field, field_value)
+    return field_value
+  getter.__module__ = None
+  getter.__doc__ = 'Getter for %s.' % proto_field_name
+
+  # We define a setter just so we can throw an exception with a more
+  # helpful error message.
+  def setter(self, new_value):
+    raise AttributeError('Assignment not allowed to composite field '
+                         '"%s" in protocol message object.' % proto_field_name)
+
+  # Add a property to encapsulate the getter.
+  doc = 'Magic attribute generated for "%s" proto field.' % proto_field_name
+  setattr(cls, property_name, _FieldProperty(field, getter, setter, doc=doc))
+
+
+def _AddPropertiesForExtensions(descriptor, cls):
+  """Adds properties for all fields in this protocol message type."""
+  extensions = descriptor.extensions_by_name
+  for extension_name, extension_field in extensions.items():
+    constant_name = extension_name.upper() + '_FIELD_NUMBER'
+    setattr(cls, constant_name, extension_field.number)
+
+  # TODO(amauryfa): Migrate all users of these attributes to functions like
+  #   pool.FindExtensionByNumber(descriptor).
+  if descriptor.file is not None:
+    # TODO(amauryfa): Use cls.MESSAGE_FACTORY.pool when available.
+    pool = descriptor.file.pool
+    cls._extensions_by_number = pool._extensions_by_number[descriptor]
+    cls._extensions_by_name = pool._extensions_by_name[descriptor]
+
+def _AddStaticMethods(cls):
+  # TODO(robinson): This probably needs to be thread-safe(?)
+  def RegisterExtension(extension_handle):
+    extension_handle.containing_type = cls.DESCRIPTOR
+    # TODO(amauryfa): Use cls.MESSAGE_FACTORY.pool when available.
+    # pylint: disable=protected-access
+    cls.DESCRIPTOR.file.pool._AddExtensionDescriptor(extension_handle)
+    _AttachFieldHelpers(cls, extension_handle)
+  cls.RegisterExtension = staticmethod(RegisterExtension)
+
+  def FromString(s):
+    message = cls()
+    message.MergeFromString(s)
+    return message
+  cls.FromString = staticmethod(FromString)
+
+
+def _IsPresent(item):
+  """Given a (FieldDescriptor, value) tuple from _fields, return true if the
+  value should be included in the list returned by ListFields()."""
+
+  if item[0].label == _FieldDescriptor.LABEL_REPEATED:
+    return bool(item[1])
+  elif item[0].cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+    return item[1]._is_present_in_parent
+  else:
+    return True
+
+
+def _AddListFieldsMethod(message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+
+  def ListFields(self):
+    all_fields = [item for item in self._fields.items() if _IsPresent(item)]
+    all_fields.sort(key = lambda item: item[0].number)
+    return all_fields
+
+  cls.ListFields = ListFields
+
+_PROTO3_ERROR_TEMPLATE = \
+  ('Protocol message %s has no non-repeated submessage field "%s" '
+   'nor marked as optional')
+_PROTO2_ERROR_TEMPLATE = 'Protocol message %s has no non-repeated field "%s"'
+
+def _AddHasFieldMethod(message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+
+  is_proto3 = (message_descriptor.syntax == "proto3")
+  error_msg = _PROTO3_ERROR_TEMPLATE if is_proto3 else _PROTO2_ERROR_TEMPLATE
+
+  hassable_fields = {}
+  for field in message_descriptor.fields:
+    if field.label == _FieldDescriptor.LABEL_REPEATED:
+      continue
+    # For proto3, only submessages and fields inside a oneof have presence.
+    if (is_proto3 and field.cpp_type != _FieldDescriptor.CPPTYPE_MESSAGE and
+        not field.containing_oneof):
+      continue
+    hassable_fields[field.name] = field
+
+  # Has methods are supported for oneof descriptors.
+  for oneof in message_descriptor.oneofs:
+    hassable_fields[oneof.name] = oneof
+
+  def HasField(self, field_name):
+    try:
+      field = hassable_fields[field_name]
+    except KeyError:
+      raise ValueError(error_msg % (message_descriptor.full_name, field_name))
+
+    if isinstance(field, descriptor_mod.OneofDescriptor):
+      try:
+        return HasField(self, self._oneofs[field].name)
+      except KeyError:
+        return False
+    else:
+      if field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+        value = self._fields.get(field)
+        return value is not None and value._is_present_in_parent
+      else:
+        return field in self._fields
+
+  cls.HasField = HasField
+
+
+def _AddClearFieldMethod(message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+  def ClearField(self, field_name):
+    try:
+      field = message_descriptor.fields_by_name[field_name]
+    except KeyError:
+      try:
+        field = message_descriptor.oneofs_by_name[field_name]
+        if field in self._oneofs:
+          field = self._oneofs[field]
+        else:
+          return
+      except KeyError:
+        raise ValueError('Protocol message %s has no "%s" field.' %
+                         (message_descriptor.name, field_name))
+
+    if field in self._fields:
+      # To match the C++ implementation, we need to invalidate iterators
+      # for map fields when ClearField() happens.
+      if hasattr(self._fields[field], 'InvalidateIterators'):
+        self._fields[field].InvalidateIterators()
+
+      # Note:  If the field is a sub-message, its listener will still point
+      #   at us.  That's fine, because the worst than can happen is that it
+      #   will call _Modified() and invalidate our byte size.  Big deal.
+      del self._fields[field]
+
+      if self._oneofs.get(field.containing_oneof, None) is field:
+        del self._oneofs[field.containing_oneof]
+
+    # Always call _Modified() -- even if nothing was changed, this is
+    # a mutating method, and thus calling it should cause the field to become
+    # present in the parent message.
+    self._Modified()
+
+  cls.ClearField = ClearField
+
+
+def _AddClearExtensionMethod(cls):
+  """Helper for _AddMessageMethods()."""
+  def ClearExtension(self, extension_handle):
+    extension_dict._VerifyExtensionHandle(self, extension_handle)
+
+    # Similar to ClearField(), above.
+    if extension_handle in self._fields:
+      del self._fields[extension_handle]
+    self._Modified()
+  cls.ClearExtension = ClearExtension
+
+
+def _AddHasExtensionMethod(cls):
+  """Helper for _AddMessageMethods()."""
+  def HasExtension(self, extension_handle):
+    extension_dict._VerifyExtensionHandle(self, extension_handle)
+    if extension_handle.label == _FieldDescriptor.LABEL_REPEATED:
+      raise KeyError('"%s" is repeated.' % extension_handle.full_name)
+
+    if extension_handle.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+      value = self._fields.get(extension_handle)
+      return value is not None and value._is_present_in_parent
+    else:
+      return extension_handle in self._fields
+  cls.HasExtension = HasExtension
+
+def _InternalUnpackAny(msg):
+  """Unpacks Any message and returns the unpacked message.
+
+  This internal method is different from public Any Unpack method which takes
+  the target message as argument. _InternalUnpackAny method does not have
+  target message type and need to find the message type in descriptor pool.
+
+  Args:
+    msg: An Any message to be unpacked.
+
+  Returns:
+    The unpacked message.
+  """
+  # TODO(amauryfa): Don't use the factory of generated messages.
+  # To make Any work with custom factories, use the message factory of the
+  # parent message.
+  # pylint: disable=g-import-not-at-top
+  from google.protobuf import symbol_database
+  factory = symbol_database.Default()
+
+  type_url = msg.type_url
+
+  if not type_url:
+    return None
+
+  # TODO(haberman): For now we just strip the hostname.  Better logic will be
+  # required.
+  type_name = type_url.split('/')[-1]
+  descriptor = factory.pool.FindMessageTypeByName(type_name)
+
+  if descriptor is None:
+    return None
+
+  message_class = factory.GetPrototype(descriptor)
+  message = message_class()
+
+  message.ParseFromString(msg.value)
+  return message
+
+
+def _AddEqualsMethod(message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+  def __eq__(self, other):
+    if (not isinstance(other, message_mod.Message) or
+        other.DESCRIPTOR != self.DESCRIPTOR):
+      return False
+
+    if self is other:
+      return True
+
+    if self.DESCRIPTOR.full_name == _AnyFullTypeName:
+      any_a = _InternalUnpackAny(self)
+      any_b = _InternalUnpackAny(other)
+      if any_a and any_b:
+        return any_a == any_b
+
+    if not self.ListFields() == other.ListFields():
+      return False
+
+    # TODO(jieluo): Fix UnknownFieldSet to consider MessageSet extensions,
+    # then use it for the comparison.
+    unknown_fields = list(self._unknown_fields)
+    unknown_fields.sort()
+    other_unknown_fields = list(other._unknown_fields)
+    other_unknown_fields.sort()
+    return unknown_fields == other_unknown_fields
+
+  cls.__eq__ = __eq__
+
+
+def _AddStrMethod(message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+  def __str__(self):
+    return text_format.MessageToString(self)
+  cls.__str__ = __str__
+
+
+def _AddReprMethod(message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+  def __repr__(self):
+    return text_format.MessageToString(self)
+  cls.__repr__ = __repr__
+
+
+def _AddUnicodeMethod(unused_message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+
+  def __unicode__(self):
+    return text_format.MessageToString(self, as_utf8=True).decode('utf-8')
+  cls.__unicode__ = __unicode__
+
+
+def _BytesForNonRepeatedElement(value, field_number, field_type):
+  """Returns the number of bytes needed to serialize a non-repeated element.
+  The returned byte count includes space for tag information and any
+  other additional space associated with serializing value.
+
+  Args:
+    value: Value we're serializing.
+    field_number: Field number of this value.  (Since the field number
+      is stored as part of a varint-encoded tag, this has an impact
+      on the total bytes required to serialize the value).
+    field_type: The type of the field.  One of the TYPE_* constants
+      within FieldDescriptor.
+  """
+  try:
+    fn = type_checkers.TYPE_TO_BYTE_SIZE_FN[field_type]
+    return fn(field_number, value)
+  except KeyError:
+    raise message_mod.EncodeError('Unrecognized field type: %d' % field_type)
+
+
+def _AddByteSizeMethod(message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+
+  def ByteSize(self):
+    if not self._cached_byte_size_dirty:
+      return self._cached_byte_size
+
+    size = 0
+    descriptor = self.DESCRIPTOR
+    if descriptor.GetOptions().map_entry:
+      # Fields of map entry should always be serialized.
+      size = descriptor.fields_by_name['key']._sizer(self.key)
+      size += descriptor.fields_by_name['value']._sizer(self.value)
+    else:
+      for field_descriptor, field_value in self.ListFields():
+        size += field_descriptor._sizer(field_value)
+      for tag_bytes, value_bytes in self._unknown_fields:
+        size += len(tag_bytes) + len(value_bytes)
+
+    self._cached_byte_size = size
+    self._cached_byte_size_dirty = False
+    self._listener_for_children.dirty = False
+    return size
+
+  cls.ByteSize = ByteSize
+
+
+def _AddSerializeToStringMethod(message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+
+  def SerializeToString(self, **kwargs):
+    # Check if the message has all of its required fields set.
+    if not self.IsInitialized():
+      raise message_mod.EncodeError(
+          'Message %s is missing required fields: %s' % (
+          self.DESCRIPTOR.full_name, ','.join(self.FindInitializationErrors())))
+    return self.SerializePartialToString(**kwargs)
+  cls.SerializeToString = SerializeToString
+
+
+def _AddSerializePartialToStringMethod(message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+
+  def SerializePartialToString(self, **kwargs):
+    out = BytesIO()
+    self._InternalSerialize(out.write, **kwargs)
+    return out.getvalue()
+  cls.SerializePartialToString = SerializePartialToString
+
+  def InternalSerialize(self, write_bytes, deterministic=None):
+    if deterministic is None:
+      deterministic = (
+          api_implementation.IsPythonDefaultSerializationDeterministic())
+    else:
+      deterministic = bool(deterministic)
+
+    descriptor = self.DESCRIPTOR
+    if descriptor.GetOptions().map_entry:
+      # Fields of map entry should always be serialized.
+      descriptor.fields_by_name['key']._encoder(
+          write_bytes, self.key, deterministic)
+      descriptor.fields_by_name['value']._encoder(
+          write_bytes, self.value, deterministic)
+    else:
+      for field_descriptor, field_value in self.ListFields():
+        field_descriptor._encoder(write_bytes, field_value, deterministic)
+      for tag_bytes, value_bytes in self._unknown_fields:
+        write_bytes(tag_bytes)
+        write_bytes(value_bytes)
+  cls._InternalSerialize = InternalSerialize
+
+
+def _AddMergeFromStringMethod(message_descriptor, cls):
+  """Helper for _AddMessageMethods()."""
+  def MergeFromString(self, serialized):
+    if isinstance(serialized, memoryview) and six.PY2:
+      raise TypeError(
+          'memoryview not supported in Python 2 with the pure Python proto '
+          'implementation: this is to maintain compatibility with the C++ '
+          'implementation')
+
+    serialized = memoryview(serialized)
+    length = len(serialized)
+    try:
+      if self._InternalParse(serialized, 0, length) != length:
+        # The only reason _InternalParse would return early is if it
+        # encountered an end-group tag.
+        raise message_mod.DecodeError('Unexpected end-group tag.')
+    except (IndexError, TypeError):
+      # Now ord(buf[p:p+1]) == ord('') gets TypeError.
+      raise message_mod.DecodeError('Truncated message.')
+    except struct.error as e:
+      raise message_mod.DecodeError(e)
+    return length   # Return this for legacy reasons.
+  cls.MergeFromString = MergeFromString
+
+  local_ReadTag = decoder.ReadTag
+  local_SkipField = decoder.SkipField
+  decoders_by_tag = cls._decoders_by_tag
+
+  def InternalParse(self, buffer, pos, end):
+    """Create a message from serialized bytes.
+
+    Args:
+      self: Message, instance of the proto message object.
+      buffer: memoryview of the serialized data.
+      pos: int, position to start in the serialized data.
+      end: int, end position of the serialized data.
+
+    Returns:
+      Message object.
+    """
+    # Guard against internal misuse, since this function is called internally
+    # quite extensively, and its easy to accidentally pass bytes.
+    assert isinstance(buffer, memoryview)
+    self._Modified()
+    field_dict = self._fields
+    # pylint: disable=protected-access
+    unknown_field_set = self._unknown_field_set
+    while pos != end:
+      (tag_bytes, new_pos) = local_ReadTag(buffer, pos)
+      field_decoder, field_desc = decoders_by_tag.get(tag_bytes, (None, None))
+      if field_decoder is None:
+        if not self._unknown_fields:   # pylint: disable=protected-access
+          self._unknown_fields = []    # pylint: disable=protected-access
+        if unknown_field_set is None:
+          # pylint: disable=protected-access
+          self._unknown_field_set = containers.UnknownFieldSet()
+          # pylint: disable=protected-access
+          unknown_field_set = self._unknown_field_set
+        # pylint: disable=protected-access
+        (tag, _) = decoder._DecodeVarint(tag_bytes, 0)
+        field_number, wire_type = wire_format.UnpackTag(tag)
+        if field_number == 0:
+          raise message_mod.DecodeError('Field number 0 is illegal.')
+        # TODO(jieluo): remove old_pos.
+        old_pos = new_pos
+        (data, new_pos) = decoder._DecodeUnknownField(
+            buffer, new_pos, wire_type)  # pylint: disable=protected-access
+        if new_pos == -1:
+          return pos
+        # pylint: disable=protected-access
+        unknown_field_set._add(field_number, wire_type, data)
+        # TODO(jieluo): remove _unknown_fields.
+        new_pos = local_SkipField(buffer, old_pos, end, tag_bytes)
+        if new_pos == -1:
+          return pos
+        self._unknown_fields.append(
+            (tag_bytes, buffer[old_pos:new_pos].tobytes()))
+        pos = new_pos
+      else:
+        pos = field_decoder(buffer, new_pos, end, self, field_dict)
+        if field_desc:
+          self._UpdateOneofState(field_desc)
+    return pos
+  cls._InternalParse = InternalParse
+
+
+def _AddIsInitializedMethod(message_descriptor, cls):
+  """Adds the IsInitialized and FindInitializationError methods to the
+  protocol message class."""
+
+  required_fields = [field for field in message_descriptor.fields
+                           if field.label == _FieldDescriptor.LABEL_REQUIRED]
+
+  def IsInitialized(self, errors=None):
+    """Checks if all required fields of a message are set.
+
+    Args:
+      errors:  A list which, if provided, will be populated with the field
+               paths of all missing required fields.
+
+    Returns:
+      True iff the specified message has all required fields set.
+    """
+
+    # Performance is critical so we avoid HasField() and ListFields().
+
+    for field in required_fields:
+      if (field not in self._fields or
+          (field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE and
+           not self._fields[field]._is_present_in_parent)):
+        if errors is not None:
+          errors.extend(self.FindInitializationErrors())
+        return False
+
+    for field, value in list(self._fields.items()):  # dict can change size!
+      if field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+        if field.label == _FieldDescriptor.LABEL_REPEATED:
+          if (field.message_type.has_options and
+              field.message_type.GetOptions().map_entry):
+            continue
+          for element in value:
+            if not element.IsInitialized():
+              if errors is not None:
+                errors.extend(self.FindInitializationErrors())
+              return False
+        elif value._is_present_in_parent and not value.IsInitialized():
+          if errors is not None:
+            errors.extend(self.FindInitializationErrors())
+          return False
+
+    return True
+
+  cls.IsInitialized = IsInitialized
+
+  def FindInitializationErrors(self):
+    """Finds required fields which are not initialized.
+
+    Returns:
+      A list of strings.  Each string is a path to an uninitialized field from
+      the top-level message, e.g. "foo.bar[5].baz".
+    """
+
+    errors = []  # simplify things
+
+    for field in required_fields:
+      if not self.HasField(field.name):
+        errors.append(field.name)
+
+    for field, value in self.ListFields():
+      if field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+        if field.is_extension:
+          name = '(%s)' % field.full_name
+        else:
+          name = field.name
+
+        if _IsMapField(field):
+          if _IsMessageMapField(field):
+            for key in value:
+              element = value[key]
+              prefix = '%s[%s].' % (name, key)
+              sub_errors = element.FindInitializationErrors()
+              errors += [prefix + error for error in sub_errors]
+          else:
+            # ScalarMaps can't have any initialization errors.
+            pass
+        elif field.label == _FieldDescriptor.LABEL_REPEATED:
+          for i in range(len(value)):
+            element = value[i]
+            prefix = '%s[%d].' % (name, i)
+            sub_errors = element.FindInitializationErrors()
+            errors += [prefix + error for error in sub_errors]
+        else:
+          prefix = name + '.'
+          sub_errors = value.FindInitializationErrors()
+          errors += [prefix + error for error in sub_errors]
+
+    return errors
+
+  cls.FindInitializationErrors = FindInitializationErrors
+
+
+def _AddMergeFromMethod(cls):
+  LABEL_REPEATED = _FieldDescriptor.LABEL_REPEATED
+  CPPTYPE_MESSAGE = _FieldDescriptor.CPPTYPE_MESSAGE
+
+  def MergeFrom(self, msg):
+    if not isinstance(msg, cls):
+      raise TypeError(
+          'Parameter to MergeFrom() must be instance of same class: '
+          'expected %s got %s.' % (cls.__name__, msg.__class__.__name__))
+
+    assert msg is not self
+    self._Modified()
+
+    fields = self._fields
+
+    for field, value in msg._fields.items():
+      if field.label == LABEL_REPEATED:
+        field_value = fields.get(field)
+        if field_value is None:
+          # Construct a new object to represent this field.
+          field_value = field._default_constructor(self)
+          fields[field] = field_value
+        field_value.MergeFrom(value)
+      elif field.cpp_type == CPPTYPE_MESSAGE:
+        if value._is_present_in_parent:
+          field_value = fields.get(field)
+          if field_value is None:
+            # Construct a new object to represent this field.
+            field_value = field._default_constructor(self)
+            fields[field] = field_value
+          field_value.MergeFrom(value)
+      else:
+        self._fields[field] = value
+        if field.containing_oneof:
+          self._UpdateOneofState(field)
+
+    if msg._unknown_fields:
+      if not self._unknown_fields:
+        self._unknown_fields = []
+      self._unknown_fields.extend(msg._unknown_fields)
+      # pylint: disable=protected-access
+      if self._unknown_field_set is None:
+        self._unknown_field_set = containers.UnknownFieldSet()
+      self._unknown_field_set._extend(msg._unknown_field_set)
+
+  cls.MergeFrom = MergeFrom
+
+
+def _AddWhichOneofMethod(message_descriptor, cls):
+  def WhichOneof(self, oneof_name):
+    """Returns the name of the currently set field inside a oneof, or None."""
+    try:
+      field = message_descriptor.oneofs_by_name[oneof_name]
+    except KeyError:
+      raise ValueError(
+          'Protocol message has no oneof "%s" field.' % oneof_name)
+
+    nested_field = self._oneofs.get(field, None)
+    if nested_field is not None and self.HasField(nested_field.name):
+      return nested_field.name
+    else:
+      return None
+
+  cls.WhichOneof = WhichOneof
+
+
+def _Clear(self):
+  # Clear fields.
+  self._fields = {}
+  self._unknown_fields = ()
+  # pylint: disable=protected-access
+  if self._unknown_field_set is not None:
+    self._unknown_field_set._clear()
+    self._unknown_field_set = None
+
+  self._oneofs = {}
+  self._Modified()
+
+
+def _UnknownFields(self):
+  if self._unknown_field_set is None:  # pylint: disable=protected-access
+    # pylint: disable=protected-access
+    self._unknown_field_set = containers.UnknownFieldSet()
+  return self._unknown_field_set    # pylint: disable=protected-access
+
+
+def _DiscardUnknownFields(self):
+  self._unknown_fields = []
+  self._unknown_field_set = None      # pylint: disable=protected-access
+  for field, value in self.ListFields():
+    if field.cpp_type == _FieldDescriptor.CPPTYPE_MESSAGE:
+      if _IsMapField(field):
+        if _IsMessageMapField(field):
+          for key in value:
+            value[key].DiscardUnknownFields()
+      elif field.label == _FieldDescriptor.LABEL_REPEATED:
+        for sub_message in value:
+          sub_message.DiscardUnknownFields()
+      else:
+        value.DiscardUnknownFields()
+
+
+def _SetListener(self, listener):
+  if listener is None:
+    self._listener = message_listener_mod.NullMessageListener()
+  else:
+    self._listener = listener
+
+
+def _AddMessageMethods(message_descriptor, cls):
+  """Adds implementations of all Message methods to cls."""
+  _AddListFieldsMethod(message_descriptor, cls)
+  _AddHasFieldMethod(message_descriptor, cls)
+  _AddClearFieldMethod(message_descriptor, cls)
+  if message_descriptor.is_extendable:
+    _AddClearExtensionMethod(cls)
+    _AddHasExtensionMethod(cls)
+  _AddEqualsMethod(message_descriptor, cls)
+  _AddStrMethod(message_descriptor, cls)
+  _AddReprMethod(message_descriptor, cls)
+  _AddUnicodeMethod(message_descriptor, cls)
+  _AddByteSizeMethod(message_descriptor, cls)
+  _AddSerializeToStringMethod(message_descriptor, cls)
+  _AddSerializePartialToStringMethod(message_descriptor, cls)
+  _AddMergeFromStringMethod(message_descriptor, cls)
+  _AddIsInitializedMethod(message_descriptor, cls)
+  _AddMergeFromMethod(cls)
+  _AddWhichOneofMethod(message_descriptor, cls)
+  # Adds methods which do not depend on cls.
+  cls.Clear = _Clear
+  cls.UnknownFields = _UnknownFields
+  cls.DiscardUnknownFields = _DiscardUnknownFields
+  cls._SetListener = _SetListener
+
+
+def _AddPrivateHelperMethods(message_descriptor, cls):
+  """Adds implementation of private helper methods to cls."""
+
+  def Modified(self):
+    """Sets the _cached_byte_size_dirty bit to true,
+    and propagates this to our listener iff this was a state change.
+    """
+
+    # Note:  Some callers check _cached_byte_size_dirty before calling
+    #   _Modified() as an extra optimization.  So, if this method is ever
+    #   changed such that it does stuff even when _cached_byte_size_dirty is
+    #   already true, the callers need to be updated.
+    if not self._cached_byte_size_dirty:
+      self._cached_byte_size_dirty = True
+      self._listener_for_children.dirty = True
+      self._is_present_in_parent = True
+      self._listener.Modified()
+
+  def _UpdateOneofState(self, field):
+    """Sets field as the active field in its containing oneof.
+
+    Will also delete currently active field in the oneof, if it is different
+    from the argument. Does not mark the message as modified.
+    """
+    other_field = self._oneofs.setdefault(field.containing_oneof, field)
+    if other_field is not field:
+      del self._fields[other_field]
+      self._oneofs[field.containing_oneof] = field
+
+  cls._Modified = Modified
+  cls.SetInParent = Modified
+  cls._UpdateOneofState = _UpdateOneofState
+
+
+class _Listener(object):
+
+  """MessageListener implementation that a parent message registers with its
+  child message.
+
+  In order to support semantics like:
+
+    foo.bar.baz.qux = 23
+    assert foo.HasField('bar')
+
+  ...child objects must have back references to their parents.
+  This helper class is at the heart of this support.
+  """
+
+  def __init__(self, parent_message):
+    """Args:
+      parent_message: The message whose _Modified() method we should call when
+        we receive Modified() messages.
+    """
+    # This listener establishes a back reference from a child (contained) object
+    # to its parent (containing) object.  We make this a weak reference to avoid
+    # creating cyclic garbage when the client finishes with the 'parent' object
+    # in the tree.
+    if isinstance(parent_message, weakref.ProxyType):
+      self._parent_message_weakref = parent_message
+    else:
+      self._parent_message_weakref = weakref.proxy(parent_message)
+
+    # As an optimization, we also indicate directly on the listener whether
+    # or not the parent message is dirty.  This way we can avoid traversing
+    # up the tree in the common case.
+    self.dirty = False
+
+  def Modified(self):
+    if self.dirty:
+      return
+    try:
+      # Propagate the signal to our parents iff this is the first field set.
+      self._parent_message_weakref._Modified()
+    except ReferenceError:
+      # We can get here if a client has kept a reference to a child object,
+      # and is now setting a field on it, but the child's parent has been
+      # garbage-collected.  This is not an error.
+      pass
+
+
+class _OneofListener(_Listener):
+  """Special listener implementation for setting composite oneof fields."""
+
+  def __init__(self, parent_message, field):
+    """Args:
+      parent_message: The message whose _Modified() method we should call when
+        we receive Modified() messages.
+      field: The descriptor of the field being set in the parent message.
+    """
+    super(_OneofListener, self).__init__(parent_message)
+    self._field = field
+
+  def Modified(self):
+    """Also updates the state of the containing oneof in the parent message."""
+    try:
+      self._parent_message_weakref._UpdateOneofState(self._field)
+      super(_OneofListener, self).Modified()
+    except ReferenceError:
+      pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/reflection_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/reflection_test.py
new file mode 100644
index 0000000..e67248f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/reflection_test.py
@@ -0,0 +1,3327 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Unittest for reflection.py, which also indirectly tests the output of the
+pure-Python protocol compiler.
+"""
+
+import copy
+import gc
+import operator
+import six
+import struct
+import warnings
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import unittest_import_pb2
+from google.protobuf import unittest_mset_pb2
+from google.protobuf import unittest_pb2
+from google.protobuf import unittest_proto3_arena_pb2
+from google.protobuf import descriptor_pb2
+from google.protobuf import descriptor
+from google.protobuf import message
+from google.protobuf import reflection
+from google.protobuf import text_format
+from google.protobuf.internal import api_implementation
+from google.protobuf.internal import more_extensions_pb2
+from google.protobuf.internal import more_messages_pb2
+from google.protobuf.internal import message_set_extensions_pb2
+from google.protobuf.internal import wire_format
+from google.protobuf.internal import test_util
+from google.protobuf.internal import testing_refleaks
+from google.protobuf.internal import decoder
+from google.protobuf.internal import _parameterized
+
+
+if six.PY3:
+  long = int  # pylint: disable=redefined-builtin,invalid-name
+
+
+warnings.simplefilter('error', DeprecationWarning)
+
+
+class _MiniDecoder(object):
+  """Decodes a stream of values from a string.
+
+  Once upon a time we actually had a class called decoder.Decoder.  Then we
+  got rid of it during a redesign that made decoding much, much faster overall.
+  But a couple tests in this file used it to check that the serialized form of
+  a message was correct.  So, this class implements just the methods that were
+  used by said tests, so that we don't have to rewrite the tests.
+  """
+
+  def __init__(self, bytes):
+    self._bytes = bytes
+    self._pos = 0
+
+  def ReadVarint(self):
+    result, self._pos = decoder._DecodeVarint(self._bytes, self._pos)
+    return result
+
+  ReadInt32 = ReadVarint
+  ReadInt64 = ReadVarint
+  ReadUInt32 = ReadVarint
+  ReadUInt64 = ReadVarint
+
+  def ReadSInt64(self):
+    return wire_format.ZigZagDecode(self.ReadVarint())
+
+  ReadSInt32 = ReadSInt64
+
+  def ReadFieldNumberAndWireType(self):
+    return wire_format.UnpackTag(self.ReadVarint())
+
+  def ReadFloat(self):
+    result = struct.unpack('<f', self._bytes[self._pos:self._pos+4])[0]
+    self._pos += 4
+    return result
+
+  def ReadDouble(self):
+    result = struct.unpack('<d', self._bytes[self._pos:self._pos+8])[0]
+    self._pos += 8
+    return result
+
+  def EndOfStream(self):
+    return self._pos == len(self._bytes)
+
+
+@_parameterized.named_parameters(
+    ('_proto2', unittest_pb2),
+    ('_proto3', unittest_proto3_arena_pb2))
+@testing_refleaks.TestCase
+class ReflectionTest(unittest.TestCase):
+
+  def assertListsEqual(self, values, others):
+    self.assertEqual(len(values), len(others))
+    for i in range(len(values)):
+      self.assertEqual(values[i], others[i])
+
+  def testScalarConstructor(self, message_module):
+    # Constructor with only scalar types should succeed.
+    proto = message_module.TestAllTypes(
+        optional_int32=24,
+        optional_double=54.321,
+        optional_string='optional_string',
+        optional_float=None)
+
+    self.assertEqual(24, proto.optional_int32)
+    self.assertEqual(54.321, proto.optional_double)
+    self.assertEqual('optional_string', proto.optional_string)
+    if message_module is unittest_pb2:
+      self.assertFalse(proto.HasField("optional_float"))
+
+  def testRepeatedScalarConstructor(self, message_module):
+    # Constructor with only repeated scalar types should succeed.
+    proto = message_module.TestAllTypes(
+        repeated_int32=[1, 2, 3, 4],
+        repeated_double=[1.23, 54.321],
+        repeated_bool=[True, False, False],
+        repeated_string=["optional_string"],
+        repeated_float=None)
+
+    self.assertEqual([1, 2, 3, 4], list(proto.repeated_int32))
+    self.assertEqual([1.23, 54.321], list(proto.repeated_double))
+    self.assertEqual([True, False, False], list(proto.repeated_bool))
+    self.assertEqual(["optional_string"], list(proto.repeated_string))
+    self.assertEqual([], list(proto.repeated_float))
+
+  def testMixedConstructor(self, message_module):
+    # Constructor with only mixed types should succeed.
+    proto = message_module.TestAllTypes(
+        optional_int32=24,
+        optional_string='optional_string',
+        repeated_double=[1.23, 54.321],
+        repeated_bool=[True, False, False],
+        repeated_nested_message=[
+            message_module.TestAllTypes.NestedMessage(
+                bb=message_module.TestAllTypes.FOO),
+            message_module.TestAllTypes.NestedMessage(
+                bb=message_module.TestAllTypes.BAR)],
+        repeated_foreign_message=[
+            message_module.ForeignMessage(c=-43),
+            message_module.ForeignMessage(c=45324),
+            message_module.ForeignMessage(c=12)],
+        optional_nested_message=None)
+
+    self.assertEqual(24, proto.optional_int32)
+    self.assertEqual('optional_string', proto.optional_string)
+    self.assertEqual([1.23, 54.321], list(proto.repeated_double))
+    self.assertEqual([True, False, False], list(proto.repeated_bool))
+    self.assertEqual(
+        [message_module.TestAllTypes.NestedMessage(
+            bb=message_module.TestAllTypes.FOO),
+         message_module.TestAllTypes.NestedMessage(
+             bb=message_module.TestAllTypes.BAR)],
+        list(proto.repeated_nested_message))
+    self.assertEqual(
+        [message_module.ForeignMessage(c=-43),
+         message_module.ForeignMessage(c=45324),
+         message_module.ForeignMessage(c=12)],
+        list(proto.repeated_foreign_message))
+    self.assertFalse(proto.HasField("optional_nested_message"))
+
+  def testConstructorTypeError(self, message_module):
+    self.assertRaises(
+        TypeError, message_module.TestAllTypes, optional_int32='foo')
+    self.assertRaises(
+        TypeError, message_module.TestAllTypes, optional_string=1234)
+    self.assertRaises(
+        TypeError, message_module.TestAllTypes, optional_nested_message=1234)
+    self.assertRaises(
+        TypeError, message_module.TestAllTypes, repeated_int32=1234)
+    self.assertRaises(
+        TypeError, message_module.TestAllTypes, repeated_int32=['foo'])
+    self.assertRaises(
+        TypeError, message_module.TestAllTypes, repeated_string=1234)
+    self.assertRaises(
+        TypeError, message_module.TestAllTypes, repeated_string=[1234])
+    self.assertRaises(
+        TypeError, message_module.TestAllTypes, repeated_nested_message=1234)
+    self.assertRaises(
+        TypeError, message_module.TestAllTypes, repeated_nested_message=[1234])
+
+  def testConstructorInvalidatesCachedByteSize(self, message_module):
+    message = message_module.TestAllTypes(optional_int32=12)
+    self.assertEqual(2, message.ByteSize())
+
+    message = message_module.TestAllTypes(
+        optional_nested_message=message_module.TestAllTypes.NestedMessage())
+    self.assertEqual(3, message.ByteSize())
+
+    message = message_module.TestAllTypes(repeated_int32=[12])
+    # TODO(jieluo): Add this test back for proto3
+    if message_module is unittest_pb2:
+      self.assertEqual(3, message.ByteSize())
+
+    message = message_module.TestAllTypes(
+        repeated_nested_message=[message_module.TestAllTypes.NestedMessage()])
+    self.assertEqual(3, message.ByteSize())
+
+  def testReferencesToNestedMessage(self, message_module):
+    proto = message_module.TestAllTypes()
+    nested = proto.optional_nested_message
+    del proto
+    # A previous version had a bug where this would raise an exception when
+    # hitting a now-dead weak reference.
+    nested.bb = 23
+
+  def testOneOf(self, message_module):
+    proto = message_module.TestAllTypes()
+    proto.oneof_uint32 = 10
+    proto.oneof_nested_message.bb = 11
+    self.assertEqual(11, proto.oneof_nested_message.bb)
+    self.assertFalse(proto.HasField('oneof_uint32'))
+    nested = proto.oneof_nested_message
+    proto.oneof_string = 'abc'
+    self.assertEqual('abc', proto.oneof_string)
+    self.assertEqual(11, nested.bb)
+    self.assertFalse(proto.HasField('oneof_nested_message'))
+
+  def testGetDefaultMessageAfterDisconnectingDefaultMessage(
+      self, message_module):
+    proto = message_module.TestAllTypes()
+    nested = proto.optional_nested_message
+    proto.ClearField('optional_nested_message')
+    del proto
+    del nested
+    # Force a garbage collect so that the underlying CMessages are freed along
+    # with the Messages they point to. This is to make sure we're not deleting
+    # default message instances.
+    gc.collect()
+    proto = message_module.TestAllTypes()
+    nested = proto.optional_nested_message
+
+  def testDisconnectingNestedMessageAfterSettingField(self, message_module):
+    proto = message_module.TestAllTypes()
+    nested = proto.optional_nested_message
+    nested.bb = 5
+    self.assertTrue(proto.HasField('optional_nested_message'))
+    proto.ClearField('optional_nested_message')  # Should disconnect from parent
+    self.assertEqual(5, nested.bb)
+    self.assertEqual(0, proto.optional_nested_message.bb)
+    self.assertIsNot(nested, proto.optional_nested_message)
+    nested.bb = 23
+    self.assertFalse(proto.HasField('optional_nested_message'))
+    self.assertEqual(0, proto.optional_nested_message.bb)
+
+  def testDisconnectingNestedMessageBeforeGettingField(self, message_module):
+    proto = message_module.TestAllTypes()
+    self.assertFalse(proto.HasField('optional_nested_message'))
+    proto.ClearField('optional_nested_message')
+    self.assertFalse(proto.HasField('optional_nested_message'))
+
+  def testDisconnectingNestedMessageAfterMerge(self, message_module):
+    # This test exercises the code path that does not use ReleaseMessage().
+    # The underlying fear is that if we use ReleaseMessage() incorrectly,
+    # we will have memory leaks.  It's hard to check that that doesn't happen,
+    # but at least we can exercise that code path to make sure it works.
+    proto1 = message_module.TestAllTypes()
+    proto2 = message_module.TestAllTypes()
+    proto2.optional_nested_message.bb = 5
+    proto1.MergeFrom(proto2)
+    self.assertTrue(proto1.HasField('optional_nested_message'))
+    proto1.ClearField('optional_nested_message')
+    self.assertFalse(proto1.HasField('optional_nested_message'))
+
+  def testDisconnectingLazyNestedMessage(self, message_module):
+    # This test exercises releasing a nested message that is lazy. This test
+    # only exercises real code in the C++ implementation as Python does not
+    # support lazy parsing, but the current C++ implementation results in
+    # memory corruption and a crash.
+    if api_implementation.Type() != 'python':
+      return
+    proto = message_module.TestAllTypes()
+    proto.optional_lazy_message.bb = 5
+    proto.ClearField('optional_lazy_message')
+    del proto
+    gc.collect()
+
+  def testSingularListFields(self, message_module):
+    proto = message_module.TestAllTypes()
+    proto.optional_fixed32 = 1
+    proto.optional_int32 = 5
+    proto.optional_string = 'foo'
+    # Access sub-message but don't set it yet.
+    nested_message = proto.optional_nested_message
+    self.assertEqual(
+      [ (proto.DESCRIPTOR.fields_by_name['optional_int32'  ], 5),
+        (proto.DESCRIPTOR.fields_by_name['optional_fixed32'], 1),
+        (proto.DESCRIPTOR.fields_by_name['optional_string' ], 'foo') ],
+      proto.ListFields())
+
+    proto.optional_nested_message.bb = 123
+    self.assertEqual(
+      [ (proto.DESCRIPTOR.fields_by_name['optional_int32'  ], 5),
+        (proto.DESCRIPTOR.fields_by_name['optional_fixed32'], 1),
+        (proto.DESCRIPTOR.fields_by_name['optional_string' ], 'foo'),
+        (proto.DESCRIPTOR.fields_by_name['optional_nested_message' ],
+             nested_message) ],
+      proto.ListFields())
+
+  def testRepeatedListFields(self, message_module):
+    proto = message_module.TestAllTypes()
+    proto.repeated_fixed32.append(1)
+    proto.repeated_int32.append(5)
+    proto.repeated_int32.append(11)
+    proto.repeated_string.extend(['foo', 'bar'])
+    proto.repeated_string.extend([])
+    proto.repeated_string.append('baz')
+    proto.repeated_string.extend(str(x) for x in range(2))
+    proto.optional_int32 = 21
+    proto.repeated_bool  # Access but don't set anything; should not be listed.
+    self.assertEqual(
+      [ (proto.DESCRIPTOR.fields_by_name['optional_int32'  ], 21),
+        (proto.DESCRIPTOR.fields_by_name['repeated_int32'  ], [5, 11]),
+        (proto.DESCRIPTOR.fields_by_name['repeated_fixed32'], [1]),
+        (proto.DESCRIPTOR.fields_by_name['repeated_string' ],
+          ['foo', 'bar', 'baz', '0', '1']) ],
+      proto.ListFields())
+
+  def testClearFieldWithUnknownFieldName(self, message_module):
+    proto = message_module.TestAllTypes()
+    self.assertRaises(ValueError, proto.ClearField, 'nonexistent_field')
+    self.assertRaises(ValueError, proto.ClearField, b'nonexistent_field')
+
+  def testDisallowedAssignments(self, message_module):
+    # It's illegal to assign values directly to repeated fields
+    # or to nonrepeated composite fields.  Ensure that this fails.
+    proto = message_module.TestAllTypes()
+    # Repeated fields.
+    self.assertRaises(AttributeError, setattr, proto, 'repeated_int32', 10)
+    # Lists shouldn't work, either.
+    self.assertRaises(AttributeError, setattr, proto, 'repeated_int32', [10])
+    # Composite fields.
+    self.assertRaises(AttributeError, setattr, proto,
+                      'optional_nested_message', 23)
+    # Assignment to a repeated nested message field without specifying
+    # the index in the array of nested messages.
+    self.assertRaises(AttributeError, setattr, proto.repeated_nested_message,
+                      'bb', 34)
+    # Assignment to an attribute of a repeated field.
+    self.assertRaises(AttributeError, setattr, proto.repeated_float,
+                      'some_attribute', 34)
+    # proto.nonexistent_field = 23 should fail as well.
+    self.assertRaises(AttributeError, setattr, proto, 'nonexistent_field', 23)
+
+  def testSingleScalarTypeSafety(self, message_module):
+    proto = message_module.TestAllTypes()
+    self.assertRaises(TypeError, setattr, proto, 'optional_int32', 1.1)
+    self.assertRaises(TypeError, setattr, proto, 'optional_int32', 'foo')
+    self.assertRaises(TypeError, setattr, proto, 'optional_string', 10)
+    self.assertRaises(TypeError, setattr, proto, 'optional_bytes', 10)
+    self.assertRaises(TypeError, setattr, proto, 'optional_bool', 'foo')
+    self.assertRaises(TypeError, setattr, proto, 'optional_float', 'foo')
+    self.assertRaises(TypeError, setattr, proto, 'optional_double', 'foo')
+    # TODO(jieluo): Fix type checking difference for python and c extension
+    if api_implementation.Type() == 'python':
+      self.assertRaises(TypeError, setattr, proto, 'optional_bool', 1.1)
+    else:
+      proto.optional_bool = 1.1
+
+  def assertIntegerTypes(self, integer_fn, message_module):
+    """Verifies setting of scalar integers.
+
+    Args:
+      integer_fn: A function to wrap the integers that will be assigned.
+      message_module: unittest_pb2 or unittest_proto3_arena_pb2
+    """
+    def TestGetAndDeserialize(field_name, value, expected_type):
+      proto = message_module.TestAllTypes()
+      value = integer_fn(value)
+      setattr(proto, field_name, value)
+      self.assertIsInstance(getattr(proto, field_name), expected_type)
+      proto2 = message_module.TestAllTypes()
+      proto2.ParseFromString(proto.SerializeToString())
+      self.assertIsInstance(getattr(proto2, field_name), expected_type)
+
+    TestGetAndDeserialize('optional_int32', 1, int)
+    TestGetAndDeserialize('optional_int32', 1 << 30, int)
+    TestGetAndDeserialize('optional_uint32', 1 << 30, int)
+    integer_64 = long
+    if struct.calcsize('L') == 4:
+      # Python only has signed ints, so 32-bit python can't fit an uint32
+      # in an int.
+      TestGetAndDeserialize('optional_uint32', 1 << 31, integer_64)
+    else:
+      # 64-bit python can fit uint32 inside an int
+      TestGetAndDeserialize('optional_uint32', 1 << 31, int)
+    TestGetAndDeserialize('optional_int64', 1 << 30, integer_64)
+    TestGetAndDeserialize('optional_int64', 1 << 60, integer_64)
+    TestGetAndDeserialize('optional_uint64', 1 << 30, integer_64)
+    TestGetAndDeserialize('optional_uint64', 1 << 60, integer_64)
+
+  def testIntegerTypes(self, message_module):
+    self.assertIntegerTypes(lambda x: x, message_module)
+
+  def testNonStandardIntegerTypes(self, message_module):
+    self.assertIntegerTypes(test_util.NonStandardInteger, message_module)
+
+  def testIllegalValuesForIntegers(self, message_module):
+    pb = message_module.TestAllTypes()
+
+    # Strings are illegal, even when the represent an integer.
+    with self.assertRaises(TypeError):
+      pb.optional_uint64 = '2'
+
+    # The exact error should propagate with a poorly written custom integer.
+    with self.assertRaisesRegexp(RuntimeError, 'my_error'):
+      pb.optional_uint64 = test_util.NonStandardInteger(5, 'my_error')
+
+  def assetIntegerBoundsChecking(self, integer_fn, message_module):
+    """Verifies bounds checking for scalar integer fields.
+
+    Args:
+      integer_fn: A function to wrap the integers that will be assigned.
+      message_module: unittest_pb2 or unittest_proto3_arena_pb2
+    """
+    def TestMinAndMaxIntegers(field_name, expected_min, expected_max):
+      pb = message_module.TestAllTypes()
+      expected_min = integer_fn(expected_min)
+      expected_max = integer_fn(expected_max)
+      setattr(pb, field_name, expected_min)
+      self.assertEqual(expected_min, getattr(pb, field_name))
+      setattr(pb, field_name, expected_max)
+      self.assertEqual(expected_max, getattr(pb, field_name))
+      self.assertRaises((ValueError, TypeError), setattr, pb, field_name,
+                        expected_min - 1)
+      self.assertRaises((ValueError, TypeError), setattr, pb, field_name,
+                        expected_max + 1)
+
+    TestMinAndMaxIntegers('optional_int32', -(1 << 31), (1 << 31) - 1)
+    TestMinAndMaxIntegers('optional_uint32', 0, 0xffffffff)
+    TestMinAndMaxIntegers('optional_int64', -(1 << 63), (1 << 63) - 1)
+    TestMinAndMaxIntegers('optional_uint64', 0, 0xffffffffffffffff)
+    # A bit of white-box testing since -1 is an int and not a long in C++ and
+    # so goes down a different path.
+    pb = message_module.TestAllTypes()
+    with self.assertRaises((ValueError, TypeError)):
+      pb.optional_uint64 = integer_fn(-(1 << 63))
+
+    pb = message_module.TestAllTypes()
+    pb.optional_nested_enum = integer_fn(1)
+    self.assertEqual(1, pb.optional_nested_enum)
+
+  def testSingleScalarBoundsChecking(self, message_module):
+    self.assetIntegerBoundsChecking(lambda x: x, message_module)
+
+  def testNonStandardSingleScalarBoundsChecking(self, message_module):
+    self.assetIntegerBoundsChecking(
+        test_util.NonStandardInteger, message_module)
+
+  def testRepeatedScalarTypeSafety(self, message_module):
+    proto = message_module.TestAllTypes()
+    self.assertRaises(TypeError, proto.repeated_int32.append, 1.1)
+    self.assertRaises(TypeError, proto.repeated_int32.append, 'foo')
+    self.assertRaises(TypeError, proto.repeated_string, 10)
+    self.assertRaises(TypeError, proto.repeated_bytes, 10)
+
+    proto.repeated_int32.append(10)
+    proto.repeated_int32[0] = 23
+    self.assertRaises(IndexError, proto.repeated_int32.__setitem__, 500, 23)
+    self.assertRaises(TypeError, proto.repeated_int32.__setitem__, 0, 'abc')
+    self.assertRaises(TypeError, proto.repeated_int32.__setitem__, 0, [])
+    self.assertRaises(TypeError, proto.repeated_int32.__setitem__,
+                      'index', 23)
+
+    proto.repeated_string.append('2')
+    self.assertRaises(TypeError, proto.repeated_string.__setitem__, 0, 10)
+
+    # Repeated enums tests.
+    #proto.repeated_nested_enum.append(0)
+
+  def testSingleScalarGettersAndSetters(self, message_module):
+    proto = message_module.TestAllTypes()
+    self.assertEqual(0, proto.optional_int32)
+    proto.optional_int32 = 1
+    self.assertEqual(1, proto.optional_int32)
+
+    proto.optional_uint64 = 0xffffffffffff
+    self.assertEqual(0xffffffffffff, proto.optional_uint64)
+    proto.optional_uint64 = 0xffffffffffffffff
+    self.assertEqual(0xffffffffffffffff, proto.optional_uint64)
+    # TODO(robinson): Test all other scalar field types.
+
+  def testEnums(self, message_module):
+    proto = message_module.TestAllTypes()
+    self.assertEqual(1, proto.FOO)
+    self.assertEqual(1, message_module.TestAllTypes.FOO)
+    self.assertEqual(2, proto.BAR)
+    self.assertEqual(2, message_module.TestAllTypes.BAR)
+    self.assertEqual(3, proto.BAZ)
+    self.assertEqual(3, message_module.TestAllTypes.BAZ)
+
+  def testEnum_Name(self, message_module):
+    self.assertEqual(
+        'FOREIGN_FOO',
+        message_module.ForeignEnum.Name(message_module.FOREIGN_FOO))
+    self.assertEqual(
+        'FOREIGN_BAR',
+        message_module.ForeignEnum.Name(message_module.FOREIGN_BAR))
+    self.assertEqual(
+        'FOREIGN_BAZ',
+        message_module.ForeignEnum.Name(message_module.FOREIGN_BAZ))
+    self.assertRaises(ValueError,
+                      message_module.ForeignEnum.Name, 11312)
+
+    proto = message_module.TestAllTypes()
+    self.assertEqual('FOO',
+                     proto.NestedEnum.Name(proto.FOO))
+    self.assertEqual('FOO',
+                     message_module.TestAllTypes.NestedEnum.Name(proto.FOO))
+    self.assertEqual('BAR',
+                     proto.NestedEnum.Name(proto.BAR))
+    self.assertEqual('BAR',
+                     message_module.TestAllTypes.NestedEnum.Name(proto.BAR))
+    self.assertEqual('BAZ',
+                     proto.NestedEnum.Name(proto.BAZ))
+    self.assertEqual('BAZ',
+                     message_module.TestAllTypes.NestedEnum.Name(proto.BAZ))
+    self.assertRaises(ValueError,
+                      proto.NestedEnum.Name, 11312)
+    self.assertRaises(ValueError,
+                      message_module.TestAllTypes.NestedEnum.Name, 11312)
+
+    # Check some coercion cases.
+    self.assertRaises(TypeError, message_module.TestAllTypes.NestedEnum.Name,
+                      11312.0)
+    self.assertRaises(TypeError, message_module.TestAllTypes.NestedEnum.Name,
+                      None)
+    self.assertEqual('FOO', message_module.TestAllTypes.NestedEnum.Name(True))
+
+  def testEnum_Value(self, message_module):
+    self.assertEqual(message_module.FOREIGN_FOO,
+                     message_module.ForeignEnum.Value('FOREIGN_FOO'))
+    self.assertEqual(message_module.FOREIGN_FOO,
+                     message_module.ForeignEnum.FOREIGN_FOO)
+
+    self.assertEqual(message_module.FOREIGN_BAR,
+                     message_module.ForeignEnum.Value('FOREIGN_BAR'))
+    self.assertEqual(message_module.FOREIGN_BAR,
+                     message_module.ForeignEnum.FOREIGN_BAR)
+
+    self.assertEqual(message_module.FOREIGN_BAZ,
+                     message_module.ForeignEnum.Value('FOREIGN_BAZ'))
+    self.assertEqual(message_module.FOREIGN_BAZ,
+                     message_module.ForeignEnum.FOREIGN_BAZ)
+
+    self.assertRaises(ValueError,
+                      message_module.ForeignEnum.Value, 'FO')
+    with self.assertRaises(AttributeError):
+      message_module.ForeignEnum.FO
+
+    proto = message_module.TestAllTypes()
+    self.assertEqual(proto.FOO,
+                     proto.NestedEnum.Value('FOO'))
+    self.assertEqual(proto.FOO,
+                     proto.NestedEnum.FOO)
+
+    self.assertEqual(proto.FOO,
+                     message_module.TestAllTypes.NestedEnum.Value('FOO'))
+    self.assertEqual(proto.FOO,
+                     message_module.TestAllTypes.NestedEnum.FOO)
+
+    self.assertEqual(proto.BAR,
+                     proto.NestedEnum.Value('BAR'))
+    self.assertEqual(proto.BAR,
+                     proto.NestedEnum.BAR)
+
+    self.assertEqual(proto.BAR,
+                     message_module.TestAllTypes.NestedEnum.Value('BAR'))
+    self.assertEqual(proto.BAR,
+                     message_module.TestAllTypes.NestedEnum.BAR)
+
+    self.assertEqual(proto.BAZ,
+                     proto.NestedEnum.Value('BAZ'))
+    self.assertEqual(proto.BAZ,
+                     proto.NestedEnum.BAZ)
+
+    self.assertEqual(proto.BAZ,
+                     message_module.TestAllTypes.NestedEnum.Value('BAZ'))
+    self.assertEqual(proto.BAZ,
+                     message_module.TestAllTypes.NestedEnum.BAZ)
+
+    self.assertRaises(ValueError,
+                      proto.NestedEnum.Value, 'Foo')
+    with self.assertRaises(AttributeError):
+      proto.NestedEnum.Value.Foo
+
+    self.assertRaises(ValueError,
+                      message_module.TestAllTypes.NestedEnum.Value, 'Foo')
+    with self.assertRaises(AttributeError):
+      message_module.TestAllTypes.NestedEnum.Value.Foo
+
+  def testEnum_KeysAndValues(self, message_module):
+    if message_module == unittest_pb2:
+      keys = ['FOREIGN_FOO', 'FOREIGN_BAR', 'FOREIGN_BAZ']
+      values = [4, 5, 6]
+      items = [('FOREIGN_FOO', 4), ('FOREIGN_BAR', 5), ('FOREIGN_BAZ', 6)]
+    else:
+      keys = ['FOREIGN_ZERO', 'FOREIGN_FOO', 'FOREIGN_BAR', 'FOREIGN_BAZ']
+      values = [0, 4, 5, 6]
+      items = [('FOREIGN_ZERO', 0), ('FOREIGN_FOO', 4),
+               ('FOREIGN_BAR', 5), ('FOREIGN_BAZ', 6)]
+    self.assertEqual(keys,
+                     list(message_module.ForeignEnum.keys()))
+    self.assertEqual(values,
+                     list(message_module.ForeignEnum.values()))
+    self.assertEqual(items,
+                     list(message_module.ForeignEnum.items()))
+
+    proto = message_module.TestAllTypes()
+    if message_module == unittest_pb2:
+      keys = ['FOO', 'BAR', 'BAZ', 'NEG']
+      values = [1, 2, 3, -1]
+      items = [('FOO', 1), ('BAR', 2), ('BAZ', 3), ('NEG', -1)]
+    else:
+      keys = ['ZERO', 'FOO', 'BAR', 'BAZ', 'NEG']
+      values = [0, 1, 2, 3, -1]
+      items = [('ZERO', 0), ('FOO', 1), ('BAR', 2), ('BAZ', 3), ('NEG', -1)]
+    self.assertEqual(keys, list(proto.NestedEnum.keys()))
+    self.assertEqual(values, list(proto.NestedEnum.values()))
+    self.assertEqual(items,
+                     list(proto.NestedEnum.items()))
+
+  def testStaticParseFrom(self, message_module):
+    proto1 = message_module.TestAllTypes()
+    test_util.SetAllFields(proto1)
+
+    string1 = proto1.SerializeToString()
+    proto2 = message_module.TestAllTypes.FromString(string1)
+
+    # Messages should be equal.
+    self.assertEqual(proto2, proto1)
+
+  def testMergeFromSingularField(self, message_module):
+    # Test merge with just a singular field.
+    proto1 = message_module.TestAllTypes()
+    proto1.optional_int32 = 1
+
+    proto2 = message_module.TestAllTypes()
+    # This shouldn't get overwritten.
+    proto2.optional_string = 'value'
+
+    proto2.MergeFrom(proto1)
+    self.assertEqual(1, proto2.optional_int32)
+    self.assertEqual('value', proto2.optional_string)
+
+  def testMergeFromRepeatedField(self, message_module):
+    # Test merge with just a repeated field.
+    proto1 = message_module.TestAllTypes()
+    proto1.repeated_int32.append(1)
+    proto1.repeated_int32.append(2)
+
+    proto2 = message_module.TestAllTypes()
+    proto2.repeated_int32.append(0)
+    proto2.MergeFrom(proto1)
+
+    self.assertEqual(0, proto2.repeated_int32[0])
+    self.assertEqual(1, proto2.repeated_int32[1])
+    self.assertEqual(2, proto2.repeated_int32[2])
+
+  def testMergeFromRepeatedNestedMessage(self, message_module):
+    # Test merge with a repeated nested message.
+    proto1 = message_module.TestAllTypes()
+    m = proto1.repeated_nested_message.add()
+    m.bb = 123
+    m = proto1.repeated_nested_message.add()
+    m.bb = 321
+
+    proto2 = message_module.TestAllTypes()
+    m = proto2.repeated_nested_message.add()
+    m.bb = 999
+    proto2.MergeFrom(proto1)
+    self.assertEqual(999, proto2.repeated_nested_message[0].bb)
+    self.assertEqual(123, proto2.repeated_nested_message[1].bb)
+    self.assertEqual(321, proto2.repeated_nested_message[2].bb)
+
+    proto3 = message_module.TestAllTypes()
+    proto3.repeated_nested_message.MergeFrom(proto2.repeated_nested_message)
+    self.assertEqual(999, proto3.repeated_nested_message[0].bb)
+    self.assertEqual(123, proto3.repeated_nested_message[1].bb)
+    self.assertEqual(321, proto3.repeated_nested_message[2].bb)
+
+  def testMergeFromAllFields(self, message_module):
+    # With all fields set.
+    proto1 = message_module.TestAllTypes()
+    test_util.SetAllFields(proto1)
+    proto2 = message_module.TestAllTypes()
+    proto2.MergeFrom(proto1)
+
+    # Messages should be equal.
+    self.assertEqual(proto2, proto1)
+
+    # Serialized string should be equal too.
+    string1 = proto1.SerializeToString()
+    string2 = proto2.SerializeToString()
+    self.assertEqual(string1, string2)
+
+  def testMergeFromBug(self, message_module):
+    message1 = message_module.TestAllTypes()
+    message2 = message_module.TestAllTypes()
+
+    # Cause optional_nested_message to be instantiated within message1, even
+    # though it is not considered to be "present".
+    message1.optional_nested_message
+    self.assertFalse(message1.HasField('optional_nested_message'))
+
+    # Merge into message2.  This should not instantiate the field is message2.
+    message2.MergeFrom(message1)
+    self.assertFalse(message2.HasField('optional_nested_message'))
+
+  def testCopyFromSingularField(self, message_module):
+    # Test copy with just a singular field.
+    proto1 = message_module.TestAllTypes()
+    proto1.optional_int32 = 1
+    proto1.optional_string = 'important-text'
+
+    proto2 = message_module.TestAllTypes()
+    proto2.optional_string = 'value'
+
+    proto2.CopyFrom(proto1)
+    self.assertEqual(1, proto2.optional_int32)
+    self.assertEqual('important-text', proto2.optional_string)
+
+  def testCopyFromRepeatedField(self, message_module):
+    # Test copy with a repeated field.
+    proto1 = message_module.TestAllTypes()
+    proto1.repeated_int32.append(1)
+    proto1.repeated_int32.append(2)
+
+    proto2 = message_module.TestAllTypes()
+    proto2.repeated_int32.append(0)
+    proto2.CopyFrom(proto1)
+
+    self.assertEqual(1, proto2.repeated_int32[0])
+    self.assertEqual(2, proto2.repeated_int32[1])
+
+  def testCopyFromAllFields(self, message_module):
+    # With all fields set.
+    proto1 = message_module.TestAllTypes()
+    test_util.SetAllFields(proto1)
+    proto2 = message_module.TestAllTypes()
+    proto2.CopyFrom(proto1)
+
+    # Messages should be equal.
+    self.assertEqual(proto2, proto1)
+
+    # Serialized string should be equal too.
+    string1 = proto1.SerializeToString()
+    string2 = proto2.SerializeToString()
+    self.assertEqual(string1, string2)
+
+  def testCopyFromSelf(self, message_module):
+    proto1 = message_module.TestAllTypes()
+    proto1.repeated_int32.append(1)
+    proto1.optional_int32 = 2
+    proto1.optional_string = 'important-text'
+
+    proto1.CopyFrom(proto1)
+    self.assertEqual(1, proto1.repeated_int32[0])
+    self.assertEqual(2, proto1.optional_int32)
+    self.assertEqual('important-text', proto1.optional_string)
+
+  def testDeepCopy(self, message_module):
+    proto1 = message_module.TestAllTypes()
+    proto1.optional_int32 = 1
+    proto2 = copy.deepcopy(proto1)
+    self.assertEqual(1, proto2.optional_int32)
+
+    proto1.repeated_int32.append(2)
+    proto1.repeated_int32.append(3)
+    container = copy.deepcopy(proto1.repeated_int32)
+    self.assertEqual([2, 3], container)
+    container.remove(container[0])
+    self.assertEqual([3], container)
+
+    message1 = proto1.repeated_nested_message.add()
+    message1.bb = 1
+    messages = copy.deepcopy(proto1.repeated_nested_message)
+    self.assertEqual(proto1.repeated_nested_message, messages)
+    message1.bb = 2
+    self.assertNotEqual(proto1.repeated_nested_message, messages)
+    messages.remove(messages[0])
+    self.assertEqual(len(messages), 0)
+
+    # TODO(anuraag): Implement deepcopy for extension dict
+
+  def testDisconnectingBeforeClear(self, message_module):
+    proto = message_module.TestAllTypes()
+    nested = proto.optional_nested_message
+    proto.Clear()
+    self.assertIsNot(nested, proto.optional_nested_message)
+    nested.bb = 23
+    self.assertFalse(proto.HasField('optional_nested_message'))
+    self.assertEqual(0, proto.optional_nested_message.bb)
+
+    proto = message_module.TestAllTypes()
+    nested = proto.optional_nested_message
+    nested.bb = 5
+    foreign = proto.optional_foreign_message
+    foreign.c = 6
+    proto.Clear()
+    self.assertIsNot(nested, proto.optional_nested_message)
+    self.assertIsNot(foreign, proto.optional_foreign_message)
+    self.assertEqual(5, nested.bb)
+    self.assertEqual(6, foreign.c)
+    nested.bb = 15
+    foreign.c = 16
+    self.assertFalse(proto.HasField('optional_nested_message'))
+    self.assertEqual(0, proto.optional_nested_message.bb)
+    self.assertFalse(proto.HasField('optional_foreign_message'))
+    self.assertEqual(0, proto.optional_foreign_message.c)
+
+  def testStringUTF8Encoding(self, message_module):
+    proto = message_module.TestAllTypes()
+
+    # Assignment of a unicode object to a field of type 'bytes' is not allowed.
+    self.assertRaises(TypeError,
+                      setattr, proto, 'optional_bytes', u'unicode object')
+
+    # Check that the default value is of python's 'unicode' type.
+    self.assertEqual(type(proto.optional_string), six.text_type)
+
+    proto.optional_string = six.text_type('Testing')
+    self.assertEqual(proto.optional_string, str('Testing'))
+
+    # Assign a value of type 'str' which can be encoded in UTF-8.
+    proto.optional_string = str('Testing')
+    self.assertEqual(proto.optional_string, six.text_type('Testing'))
+
+    # Try to assign a 'bytes' object which contains non-UTF-8.
+    self.assertRaises(ValueError,
+                      setattr, proto, 'optional_string', b'a\x80a')
+    # No exception: Assign already encoded UTF-8 bytes to a string field.
+    utf8_bytes = u'Тест'.encode('utf-8')
+    proto.optional_string = utf8_bytes
+    # No exception: Assign the a non-ascii unicode object.
+    proto.optional_string = u'Тест'
+    # No exception thrown (normal str assignment containing ASCII).
+    proto.optional_string = 'abc'
+
+  def testBytesInTextFormat(self, message_module):
+    proto = message_module.TestAllTypes(optional_bytes=b'\x00\x7f\x80\xff')
+    self.assertEqual(u'optional_bytes: "\\000\\177\\200\\377"\n',
+                     six.text_type(proto))
+
+  def testEmptyNestedMessage(self, message_module):
+    proto = message_module.TestAllTypes()
+    proto.optional_nested_message.MergeFrom(
+        message_module.TestAllTypes.NestedMessage())
+    self.assertTrue(proto.HasField('optional_nested_message'))
+
+    proto = message_module.TestAllTypes()
+    proto.optional_nested_message.CopyFrom(
+        message_module.TestAllTypes.NestedMessage())
+    self.assertTrue(proto.HasField('optional_nested_message'))
+
+    proto = message_module.TestAllTypes()
+    bytes_read = proto.optional_nested_message.MergeFromString(b'')
+    self.assertEqual(0, bytes_read)
+    self.assertTrue(proto.HasField('optional_nested_message'))
+
+    proto = message_module.TestAllTypes()
+    proto.optional_nested_message.ParseFromString(b'')
+    self.assertTrue(proto.HasField('optional_nested_message'))
+
+    serialized = proto.SerializeToString()
+    proto2 = message_module.TestAllTypes()
+    self.assertEqual(
+        len(serialized),
+        proto2.MergeFromString(serialized))
+    self.assertTrue(proto2.HasField('optional_nested_message'))
+
+
+# Class to test proto2-only features (required, extensions, etc.)
+@testing_refleaks.TestCase
+class Proto2ReflectionTest(unittest.TestCase):
+
+  def testRepeatedCompositeConstructor(self):
+    # Constructor with only repeated composite types should succeed.
+    proto = unittest_pb2.TestAllTypes(
+        repeated_nested_message=[
+            unittest_pb2.TestAllTypes.NestedMessage(
+                bb=unittest_pb2.TestAllTypes.FOO),
+            unittest_pb2.TestAllTypes.NestedMessage(
+                bb=unittest_pb2.TestAllTypes.BAR)],
+        repeated_foreign_message=[
+            unittest_pb2.ForeignMessage(c=-43),
+            unittest_pb2.ForeignMessage(c=45324),
+            unittest_pb2.ForeignMessage(c=12)],
+        repeatedgroup=[
+            unittest_pb2.TestAllTypes.RepeatedGroup(),
+            unittest_pb2.TestAllTypes.RepeatedGroup(a=1),
+            unittest_pb2.TestAllTypes.RepeatedGroup(a=2)])
+
+    self.assertEqual(
+        [unittest_pb2.TestAllTypes.NestedMessage(
+            bb=unittest_pb2.TestAllTypes.FOO),
+         unittest_pb2.TestAllTypes.NestedMessage(
+             bb=unittest_pb2.TestAllTypes.BAR)],
+        list(proto.repeated_nested_message))
+    self.assertEqual(
+        [unittest_pb2.ForeignMessage(c=-43),
+         unittest_pb2.ForeignMessage(c=45324),
+         unittest_pb2.ForeignMessage(c=12)],
+        list(proto.repeated_foreign_message))
+    self.assertEqual(
+        [unittest_pb2.TestAllTypes.RepeatedGroup(),
+         unittest_pb2.TestAllTypes.RepeatedGroup(a=1),
+         unittest_pb2.TestAllTypes.RepeatedGroup(a=2)],
+        list(proto.repeatedgroup))
+
+  def assertListsEqual(self, values, others):
+    self.assertEqual(len(values), len(others))
+    for i in range(len(values)):
+      self.assertEqual(values[i], others[i])
+
+  def testSimpleHasBits(self):
+    # Test a scalar.
+    proto = unittest_pb2.TestAllTypes()
+    self.assertFalse(proto.HasField('optional_int32'))
+    self.assertEqual(0, proto.optional_int32)
+    # HasField() shouldn't be true if all we've done is
+    # read the default value.
+    self.assertFalse(proto.HasField('optional_int32'))
+    proto.optional_int32 = 1
+    # Setting a value however *should* set the "has" bit.
+    self.assertTrue(proto.HasField('optional_int32'))
+    proto.ClearField('optional_int32')
+    # And clearing that value should unset the "has" bit.
+    self.assertFalse(proto.HasField('optional_int32'))
+
+  def testHasBitsWithSinglyNestedScalar(self):
+    # Helper used to test foreign messages and groups.
+    #
+    # composite_field_name should be the name of a non-repeated
+    # composite (i.e., foreign or group) field in TestAllTypes,
+    # and scalar_field_name should be the name of an integer-valued
+    # scalar field within that composite.
+    #
+    # I never thought I'd miss C++ macros and templates so much. :(
+    # This helper is semantically just:
+    #
+    #   assert proto.composite_field.scalar_field == 0
+    #   assert not proto.composite_field.HasField('scalar_field')
+    #   assert not proto.HasField('composite_field')
+    #
+    #   proto.composite_field.scalar_field = 10
+    #   old_composite_field = proto.composite_field
+    #
+    #   assert proto.composite_field.scalar_field == 10
+    #   assert proto.composite_field.HasField('scalar_field')
+    #   assert proto.HasField('composite_field')
+    #
+    #   proto.ClearField('composite_field')
+    #
+    #   assert not proto.composite_field.HasField('scalar_field')
+    #   assert not proto.HasField('composite_field')
+    #   assert proto.composite_field.scalar_field == 0
+    #
+    #   # Now ensure that ClearField('composite_field') disconnected
+    #   # the old field object from the object tree...
+    #   assert old_composite_field is not proto.composite_field
+    #   old_composite_field.scalar_field = 20
+    #   assert not proto.composite_field.HasField('scalar_field')
+    #   assert not proto.HasField('composite_field')
+    def TestCompositeHasBits(composite_field_name, scalar_field_name):
+      proto = unittest_pb2.TestAllTypes()
+      # First, check that we can get the scalar value, and see that it's the
+      # default (0), but that proto.HasField('omposite') and
+      # proto.composite.HasField('scalar') will still return False.
+      composite_field = getattr(proto, composite_field_name)
+      original_scalar_value = getattr(composite_field, scalar_field_name)
+      self.assertEqual(0, original_scalar_value)
+      # Assert that the composite object does not "have" the scalar.
+      self.assertFalse(composite_field.HasField(scalar_field_name))
+      # Assert that proto does not "have" the composite field.
+      self.assertFalse(proto.HasField(composite_field_name))
+
+      # Now set the scalar within the composite field.  Ensure that the setting
+      # is reflected, and that proto.HasField('composite') and
+      # proto.composite.HasField('scalar') now both return True.
+      new_val = 20
+      setattr(composite_field, scalar_field_name, new_val)
+      self.assertEqual(new_val, getattr(composite_field, scalar_field_name))
+      # Hold on to a reference to the current composite_field object.
+      old_composite_field = composite_field
+      # Assert that the has methods now return true.
+      self.assertTrue(composite_field.HasField(scalar_field_name))
+      self.assertTrue(proto.HasField(composite_field_name))
+
+      # Now call the clear method...
+      proto.ClearField(composite_field_name)
+
+      # ...and ensure that the "has" bits are all back to False...
+      composite_field = getattr(proto, composite_field_name)
+      self.assertFalse(composite_field.HasField(scalar_field_name))
+      self.assertFalse(proto.HasField(composite_field_name))
+      # ...and ensure that the scalar field has returned to its default.
+      self.assertEqual(0, getattr(composite_field, scalar_field_name))
+
+      self.assertIsNot(old_composite_field, composite_field)
+      setattr(old_composite_field, scalar_field_name, new_val)
+      self.assertFalse(composite_field.HasField(scalar_field_name))
+      self.assertFalse(proto.HasField(composite_field_name))
+      self.assertEqual(0, getattr(composite_field, scalar_field_name))
+
+    # Test simple, single-level nesting when we set a scalar.
+    TestCompositeHasBits('optionalgroup', 'a')
+    TestCompositeHasBits('optional_nested_message', 'bb')
+    TestCompositeHasBits('optional_foreign_message', 'c')
+    TestCompositeHasBits('optional_import_message', 'd')
+
+  def testHasBitsWhenModifyingRepeatedFields(self):
+    # Test nesting when we add an element to a repeated field in a submessage.
+    proto = unittest_pb2.TestNestedMessageHasBits()
+    proto.optional_nested_message.nestedmessage_repeated_int32.append(5)
+    self.assertEqual(
+        [5], proto.optional_nested_message.nestedmessage_repeated_int32)
+    self.assertTrue(proto.HasField('optional_nested_message'))
+
+    # Do the same test, but with a repeated composite field within the
+    # submessage.
+    proto.ClearField('optional_nested_message')
+    self.assertFalse(proto.HasField('optional_nested_message'))
+    proto.optional_nested_message.nestedmessage_repeated_foreignmessage.add()
+    self.assertTrue(proto.HasField('optional_nested_message'))
+
+  def testHasBitsForManyLevelsOfNesting(self):
+    # Test nesting many levels deep.
+    recursive_proto = unittest_pb2.TestMutualRecursionA()
+    self.assertFalse(recursive_proto.HasField('bb'))
+    self.assertEqual(0, recursive_proto.bb.a.bb.a.bb.optional_int32)
+    self.assertFalse(recursive_proto.HasField('bb'))
+    recursive_proto.bb.a.bb.a.bb.optional_int32 = 5
+    self.assertEqual(5, recursive_proto.bb.a.bb.a.bb.optional_int32)
+    self.assertTrue(recursive_proto.HasField('bb'))
+    self.assertTrue(recursive_proto.bb.HasField('a'))
+    self.assertTrue(recursive_proto.bb.a.HasField('bb'))
+    self.assertTrue(recursive_proto.bb.a.bb.HasField('a'))
+    self.assertTrue(recursive_proto.bb.a.bb.a.HasField('bb'))
+    self.assertFalse(recursive_proto.bb.a.bb.a.bb.HasField('a'))
+    self.assertTrue(recursive_proto.bb.a.bb.a.bb.HasField('optional_int32'))
+
+  def testSingularListExtensions(self):
+    proto = unittest_pb2.TestAllExtensions()
+    proto.Extensions[unittest_pb2.optional_fixed32_extension] = 1
+    proto.Extensions[unittest_pb2.optional_int32_extension  ] = 5
+    proto.Extensions[unittest_pb2.optional_string_extension ] = 'foo'
+    self.assertEqual(
+      [ (unittest_pb2.optional_int32_extension  , 5),
+        (unittest_pb2.optional_fixed32_extension, 1),
+        (unittest_pb2.optional_string_extension , 'foo') ],
+      proto.ListFields())
+    del proto.Extensions[unittest_pb2.optional_fixed32_extension]
+    self.assertEqual(
+        [(unittest_pb2.optional_int32_extension, 5),
+         (unittest_pb2.optional_string_extension, 'foo')],
+        proto.ListFields())
+
+  def testRepeatedListExtensions(self):
+    proto = unittest_pb2.TestAllExtensions()
+    proto.Extensions[unittest_pb2.repeated_fixed32_extension].append(1)
+    proto.Extensions[unittest_pb2.repeated_int32_extension  ].append(5)
+    proto.Extensions[unittest_pb2.repeated_int32_extension  ].append(11)
+    proto.Extensions[unittest_pb2.repeated_string_extension ].append('foo')
+    proto.Extensions[unittest_pb2.repeated_string_extension ].append('bar')
+    proto.Extensions[unittest_pb2.repeated_string_extension ].append('baz')
+    proto.Extensions[unittest_pb2.optional_int32_extension  ] = 21
+    self.assertEqual(
+      [ (unittest_pb2.optional_int32_extension  , 21),
+        (unittest_pb2.repeated_int32_extension  , [5, 11]),
+        (unittest_pb2.repeated_fixed32_extension, [1]),
+        (unittest_pb2.repeated_string_extension , ['foo', 'bar', 'baz']) ],
+      proto.ListFields())
+    del proto.Extensions[unittest_pb2.repeated_int32_extension]
+    del proto.Extensions[unittest_pb2.repeated_string_extension]
+    self.assertEqual(
+        [(unittest_pb2.optional_int32_extension, 21),
+         (unittest_pb2.repeated_fixed32_extension, [1])],
+        proto.ListFields())
+
+  def testListFieldsAndExtensions(self):
+    proto = unittest_pb2.TestFieldOrderings()
+    test_util.SetAllFieldsAndExtensions(proto)
+    unittest_pb2.my_extension_int
+    self.assertEqual(
+      [ (proto.DESCRIPTOR.fields_by_name['my_int'   ], 1),
+        (unittest_pb2.my_extension_int               , 23),
+        (proto.DESCRIPTOR.fields_by_name['my_string'], 'foo'),
+        (unittest_pb2.my_extension_string            , 'bar'),
+        (proto.DESCRIPTOR.fields_by_name['my_float' ], 1.0) ],
+      proto.ListFields())
+
+  def testDefaultValues(self):
+    proto = unittest_pb2.TestAllTypes()
+    self.assertEqual(0, proto.optional_int32)
+    self.assertEqual(0, proto.optional_int64)
+    self.assertEqual(0, proto.optional_uint32)
+    self.assertEqual(0, proto.optional_uint64)
+    self.assertEqual(0, proto.optional_sint32)
+    self.assertEqual(0, proto.optional_sint64)
+    self.assertEqual(0, proto.optional_fixed32)
+    self.assertEqual(0, proto.optional_fixed64)
+    self.assertEqual(0, proto.optional_sfixed32)
+    self.assertEqual(0, proto.optional_sfixed64)
+    self.assertEqual(0.0, proto.optional_float)
+    self.assertEqual(0.0, proto.optional_double)
+    self.assertEqual(False, proto.optional_bool)
+    self.assertEqual('', proto.optional_string)
+    self.assertEqual(b'', proto.optional_bytes)
+
+    self.assertEqual(41, proto.default_int32)
+    self.assertEqual(42, proto.default_int64)
+    self.assertEqual(43, proto.default_uint32)
+    self.assertEqual(44, proto.default_uint64)
+    self.assertEqual(-45, proto.default_sint32)
+    self.assertEqual(46, proto.default_sint64)
+    self.assertEqual(47, proto.default_fixed32)
+    self.assertEqual(48, proto.default_fixed64)
+    self.assertEqual(49, proto.default_sfixed32)
+    self.assertEqual(-50, proto.default_sfixed64)
+    self.assertEqual(51.5, proto.default_float)
+    self.assertEqual(52e3, proto.default_double)
+    self.assertEqual(True, proto.default_bool)
+    self.assertEqual('hello', proto.default_string)
+    self.assertEqual(b'world', proto.default_bytes)
+    self.assertEqual(unittest_pb2.TestAllTypes.BAR, proto.default_nested_enum)
+    self.assertEqual(unittest_pb2.FOREIGN_BAR, proto.default_foreign_enum)
+    self.assertEqual(unittest_import_pb2.IMPORT_BAR,
+                     proto.default_import_enum)
+
+    proto = unittest_pb2.TestExtremeDefaultValues()
+    self.assertEqual(u'\u1234', proto.utf8_string)
+
+  def testHasFieldWithUnknownFieldName(self):
+    proto = unittest_pb2.TestAllTypes()
+    self.assertRaises(ValueError, proto.HasField, 'nonexistent_field')
+
+  def testClearRemovesChildren(self):
+    # Make sure there aren't any implementation bugs that are only partially
+    # clearing the message (which can happen in the more complex C++
+    # implementation which has parallel message lists).
+    proto = unittest_pb2.TestRequiredForeign()
+    for i in range(10):
+      proto.repeated_message.add()
+    proto2 = unittest_pb2.TestRequiredForeign()
+    proto.CopyFrom(proto2)
+    self.assertRaises(IndexError, lambda: proto.repeated_message[5])
+
+  def testSingleScalarClearField(self):
+    proto = unittest_pb2.TestAllTypes()
+    # Should be allowed to clear something that's not there (a no-op).
+    proto.ClearField('optional_int32')
+    proto.optional_int32 = 1
+    self.assertTrue(proto.HasField('optional_int32'))
+    proto.ClearField('optional_int32')
+    self.assertEqual(0, proto.optional_int32)
+    self.assertFalse(proto.HasField('optional_int32'))
+    # TODO(robinson): Test all other scalar field types.
+
+  def testRepeatedScalars(self):
+    proto = unittest_pb2.TestAllTypes()
+
+    self.assertFalse(proto.repeated_int32)
+    self.assertEqual(0, len(proto.repeated_int32))
+    proto.repeated_int32.append(5)
+    proto.repeated_int32.append(10)
+    proto.repeated_int32.append(15)
+    self.assertTrue(proto.repeated_int32)
+    self.assertEqual(3, len(proto.repeated_int32))
+
+    self.assertEqual([5, 10, 15], proto.repeated_int32)
+
+    # Test single retrieval.
+    self.assertEqual(5, proto.repeated_int32[0])
+    self.assertEqual(15, proto.repeated_int32[-1])
+    # Test out-of-bounds indices.
+    self.assertRaises(IndexError, proto.repeated_int32.__getitem__, 1234)
+    self.assertRaises(IndexError, proto.repeated_int32.__getitem__, -1234)
+    # Test incorrect types passed to __getitem__.
+    self.assertRaises(TypeError, proto.repeated_int32.__getitem__, 'foo')
+    self.assertRaises(TypeError, proto.repeated_int32.__getitem__, None)
+
+    # Test single assignment.
+    proto.repeated_int32[1] = 20
+    self.assertEqual([5, 20, 15], proto.repeated_int32)
+
+    # Test insertion.
+    proto.repeated_int32.insert(1, 25)
+    self.assertEqual([5, 25, 20, 15], proto.repeated_int32)
+
+    # Test slice retrieval.
+    proto.repeated_int32.append(30)
+    self.assertEqual([25, 20, 15], proto.repeated_int32[1:4])
+    self.assertEqual([5, 25, 20, 15, 30], proto.repeated_int32[:])
+
+    # Test slice assignment with an iterator
+    proto.repeated_int32[1:4] = (i for i in range(3))
+    self.assertEqual([5, 0, 1, 2, 30], proto.repeated_int32)
+
+    # Test slice assignment.
+    proto.repeated_int32[1:4] = [35, 40, 45]
+    self.assertEqual([5, 35, 40, 45, 30], proto.repeated_int32)
+
+    # Test that we can use the field as an iterator.
+    result = []
+    for i in proto.repeated_int32:
+      result.append(i)
+    self.assertEqual([5, 35, 40, 45, 30], result)
+
+    # Test single deletion.
+    del proto.repeated_int32[2]
+    self.assertEqual([5, 35, 45, 30], proto.repeated_int32)
+
+    # Test slice deletion.
+    del proto.repeated_int32[2:]
+    self.assertEqual([5, 35], proto.repeated_int32)
+
+    # Test extending.
+    proto.repeated_int32.extend([3, 13])
+    self.assertEqual([5, 35, 3, 13], proto.repeated_int32)
+
+    # Test clearing.
+    proto.ClearField('repeated_int32')
+    self.assertFalse(proto.repeated_int32)
+    self.assertEqual(0, len(proto.repeated_int32))
+
+    proto.repeated_int32.append(1)
+    self.assertEqual(1, proto.repeated_int32[-1])
+    # Test assignment to a negative index.
+    proto.repeated_int32[-1] = 2
+    self.assertEqual(2, proto.repeated_int32[-1])
+
+    # Test deletion at negative indices.
+    proto.repeated_int32[:] = [0, 1, 2, 3]
+    del proto.repeated_int32[-1]
+    self.assertEqual([0, 1, 2], proto.repeated_int32)
+
+    del proto.repeated_int32[-2]
+    self.assertEqual([0, 2], proto.repeated_int32)
+
+    self.assertRaises(IndexError, proto.repeated_int32.__delitem__, -3)
+    self.assertRaises(IndexError, proto.repeated_int32.__delitem__, 300)
+
+    del proto.repeated_int32[-2:-1]
+    self.assertEqual([2], proto.repeated_int32)
+
+    del proto.repeated_int32[100:10000]
+    self.assertEqual([2], proto.repeated_int32)
+
+  def testRepeatedScalarsRemove(self):
+    proto = unittest_pb2.TestAllTypes()
+
+    self.assertFalse(proto.repeated_int32)
+    self.assertEqual(0, len(proto.repeated_int32))
+    proto.repeated_int32.append(5)
+    proto.repeated_int32.append(10)
+    proto.repeated_int32.append(5)
+    proto.repeated_int32.append(5)
+
+    self.assertEqual(4, len(proto.repeated_int32))
+    proto.repeated_int32.remove(5)
+    self.assertEqual(3, len(proto.repeated_int32))
+    self.assertEqual(10, proto.repeated_int32[0])
+    self.assertEqual(5, proto.repeated_int32[1])
+    self.assertEqual(5, proto.repeated_int32[2])
+
+    proto.repeated_int32.remove(5)
+    self.assertEqual(2, len(proto.repeated_int32))
+    self.assertEqual(10, proto.repeated_int32[0])
+    self.assertEqual(5, proto.repeated_int32[1])
+
+    proto.repeated_int32.remove(10)
+    self.assertEqual(1, len(proto.repeated_int32))
+    self.assertEqual(5, proto.repeated_int32[0])
+
+    # Remove a non-existent element.
+    self.assertRaises(ValueError, proto.repeated_int32.remove, 123)
+
+  def testRepeatedComposites(self):
+    proto = unittest_pb2.TestAllTypes()
+    self.assertFalse(proto.repeated_nested_message)
+    self.assertEqual(0, len(proto.repeated_nested_message))
+    m0 = proto.repeated_nested_message.add()
+    m1 = proto.repeated_nested_message.add()
+    self.assertTrue(proto.repeated_nested_message)
+    self.assertEqual(2, len(proto.repeated_nested_message))
+    self.assertListsEqual([m0, m1], proto.repeated_nested_message)
+    self.assertIsInstance(m0, unittest_pb2.TestAllTypes.NestedMessage)
+
+    # Test out-of-bounds indices.
+    self.assertRaises(IndexError, proto.repeated_nested_message.__getitem__,
+                      1234)
+    self.assertRaises(IndexError, proto.repeated_nested_message.__getitem__,
+                      -1234)
+
+    # Test incorrect types passed to __getitem__.
+    self.assertRaises(TypeError, proto.repeated_nested_message.__getitem__,
+                      'foo')
+    self.assertRaises(TypeError, proto.repeated_nested_message.__getitem__,
+                      None)
+
+    # Test slice retrieval.
+    m2 = proto.repeated_nested_message.add()
+    m3 = proto.repeated_nested_message.add()
+    m4 = proto.repeated_nested_message.add()
+    self.assertListsEqual(
+        [m1, m2, m3], proto.repeated_nested_message[1:4])
+    self.assertListsEqual(
+        [m0, m1, m2, m3, m4], proto.repeated_nested_message[:])
+    self.assertListsEqual(
+        [m0, m1], proto.repeated_nested_message[:2])
+    self.assertListsEqual(
+        [m2, m3, m4], proto.repeated_nested_message[2:])
+    self.assertEqual(
+        m0, proto.repeated_nested_message[0])
+    self.assertListsEqual(
+        [m0], proto.repeated_nested_message[:1])
+
+    # Test that we can use the field as an iterator.
+    result = []
+    for i in proto.repeated_nested_message:
+      result.append(i)
+    self.assertListsEqual([m0, m1, m2, m3, m4], result)
+
+    # Test single deletion.
+    del proto.repeated_nested_message[2]
+    self.assertListsEqual([m0, m1, m3, m4], proto.repeated_nested_message)
+
+    # Test slice deletion.
+    del proto.repeated_nested_message[2:]
+    self.assertListsEqual([m0, m1], proto.repeated_nested_message)
+
+    # Test extending.
+    n1 = unittest_pb2.TestAllTypes.NestedMessage(bb=1)
+    n2 = unittest_pb2.TestAllTypes.NestedMessage(bb=2)
+    proto.repeated_nested_message.extend([n1,n2])
+    self.assertEqual(4, len(proto.repeated_nested_message))
+    self.assertEqual(n1, proto.repeated_nested_message[2])
+    self.assertEqual(n2, proto.repeated_nested_message[3])
+    self.assertRaises(TypeError,
+                      proto.repeated_nested_message.extend, n1)
+    self.assertRaises(TypeError,
+                      proto.repeated_nested_message.extend, [0])
+    wrong_message_type = unittest_pb2.TestAllTypes()
+    self.assertRaises(TypeError,
+                      proto.repeated_nested_message.extend,
+                      [wrong_message_type])
+
+    # Test clearing.
+    proto.ClearField('repeated_nested_message')
+    self.assertFalse(proto.repeated_nested_message)
+    self.assertEqual(0, len(proto.repeated_nested_message))
+
+    # Test constructing an element while adding it.
+    proto.repeated_nested_message.add(bb=23)
+    self.assertEqual(1, len(proto.repeated_nested_message))
+    self.assertEqual(23, proto.repeated_nested_message[0].bb)
+    self.assertRaises(TypeError, proto.repeated_nested_message.add, 23)
+    with self.assertRaises(Exception):
+      proto.repeated_nested_message[0] = 23
+
+  def testRepeatedCompositeRemove(self):
+    proto = unittest_pb2.TestAllTypes()
+
+    self.assertEqual(0, len(proto.repeated_nested_message))
+    m0 = proto.repeated_nested_message.add()
+    # Need to set some differentiating variable so m0 != m1 != m2:
+    m0.bb = len(proto.repeated_nested_message)
+    m1 = proto.repeated_nested_message.add()
+    m1.bb = len(proto.repeated_nested_message)
+    self.assertTrue(m0 != m1)
+    m2 = proto.repeated_nested_message.add()
+    m2.bb = len(proto.repeated_nested_message)
+    self.assertListsEqual([m0, m1, m2], proto.repeated_nested_message)
+
+    self.assertEqual(3, len(proto.repeated_nested_message))
+    proto.repeated_nested_message.remove(m0)
+    self.assertEqual(2, len(proto.repeated_nested_message))
+    self.assertEqual(m1, proto.repeated_nested_message[0])
+    self.assertEqual(m2, proto.repeated_nested_message[1])
+
+    # Removing m0 again or removing None should raise error
+    self.assertRaises(ValueError, proto.repeated_nested_message.remove, m0)
+    self.assertRaises(ValueError, proto.repeated_nested_message.remove, None)
+    self.assertEqual(2, len(proto.repeated_nested_message))
+
+    proto.repeated_nested_message.remove(m2)
+    self.assertEqual(1, len(proto.repeated_nested_message))
+    self.assertEqual(m1, proto.repeated_nested_message[0])
+
+  def testHandWrittenReflection(self):
+    # Hand written extensions are only supported by the pure-Python
+    # implementation of the API.
+    if api_implementation.Type() != 'python':
+      return
+
+    FieldDescriptor = descriptor.FieldDescriptor
+    foo_field_descriptor = FieldDescriptor(
+        name='foo_field', full_name='MyProto.foo_field',
+        index=0, number=1, type=FieldDescriptor.TYPE_INT64,
+        cpp_type=FieldDescriptor.CPPTYPE_INT64,
+        label=FieldDescriptor.LABEL_OPTIONAL, default_value=0,
+        containing_type=None, message_type=None, enum_type=None,
+        is_extension=False, extension_scope=None,
+        options=descriptor_pb2.FieldOptions(),
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+    mydescriptor = descriptor.Descriptor(
+        name='MyProto', full_name='MyProto', filename='ignored',
+        containing_type=None, nested_types=[], enum_types=[],
+        fields=[foo_field_descriptor], extensions=[],
+        options=descriptor_pb2.MessageOptions(),
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+    class MyProtoClass(six.with_metaclass(reflection.GeneratedProtocolMessageType, message.Message)):
+      DESCRIPTOR = mydescriptor
+    myproto_instance = MyProtoClass()
+    self.assertEqual(0, myproto_instance.foo_field)
+    self.assertFalse(myproto_instance.HasField('foo_field'))
+    myproto_instance.foo_field = 23
+    self.assertEqual(23, myproto_instance.foo_field)
+    self.assertTrue(myproto_instance.HasField('foo_field'))
+
+  @testing_refleaks.SkipReferenceLeakChecker('MakeDescriptor is not repeatable')
+  def testDescriptorProtoSupport(self):
+    # Hand written descriptors/reflection are only supported by the pure-Python
+    # implementation of the API.
+    if api_implementation.Type() != 'python':
+      return
+
+    def AddDescriptorField(proto, field_name, field_type):
+      AddDescriptorField.field_index += 1
+      new_field = proto.field.add()
+      new_field.name = field_name
+      new_field.type = field_type
+      new_field.number = AddDescriptorField.field_index
+      new_field.label = descriptor_pb2.FieldDescriptorProto.LABEL_OPTIONAL
+
+    AddDescriptorField.field_index = 0
+
+    desc_proto = descriptor_pb2.DescriptorProto()
+    desc_proto.name = 'Car'
+    fdp = descriptor_pb2.FieldDescriptorProto
+    AddDescriptorField(desc_proto, 'name', fdp.TYPE_STRING)
+    AddDescriptorField(desc_proto, 'year', fdp.TYPE_INT64)
+    AddDescriptorField(desc_proto, 'automatic', fdp.TYPE_BOOL)
+    AddDescriptorField(desc_proto, 'price', fdp.TYPE_DOUBLE)
+    # Add a repeated field
+    AddDescriptorField.field_index += 1
+    new_field = desc_proto.field.add()
+    new_field.name = 'owners'
+    new_field.type = fdp.TYPE_STRING
+    new_field.number = AddDescriptorField.field_index
+    new_field.label = descriptor_pb2.FieldDescriptorProto.LABEL_REPEATED
+
+    desc = descriptor.MakeDescriptor(desc_proto)
+    self.assertTrue('name' in desc.fields_by_name)
+    self.assertTrue('year' in desc.fields_by_name)
+    self.assertTrue('automatic' in desc.fields_by_name)
+    self.assertTrue('price' in desc.fields_by_name)
+    self.assertTrue('owners' in desc.fields_by_name)
+
+    class CarMessage(six.with_metaclass(reflection.GeneratedProtocolMessageType,
+                                        message.Message)):
+      DESCRIPTOR = desc
+
+    prius = CarMessage()
+    prius.name = 'prius'
+    prius.year = 2010
+    prius.automatic = True
+    prius.price = 25134.75
+    prius.owners.extend(['bob', 'susan'])
+
+    serialized_prius = prius.SerializeToString()
+    new_prius = reflection.ParseMessage(desc, serialized_prius)
+    self.assertIsNot(new_prius, prius)
+    self.assertEqual(prius, new_prius)
+
+    # these are unnecessary assuming message equality works as advertised but
+    # explicitly check to be safe since we're mucking about in metaclass foo
+    self.assertEqual(prius.name, new_prius.name)
+    self.assertEqual(prius.year, new_prius.year)
+    self.assertEqual(prius.automatic, new_prius.automatic)
+    self.assertEqual(prius.price, new_prius.price)
+    self.assertEqual(prius.owners, new_prius.owners)
+
+  def testExtensionDelete(self):
+    extendee_proto = more_extensions_pb2.ExtendedMessage()
+
+    extension_int32 = more_extensions_pb2.optional_int_extension
+    extendee_proto.Extensions[extension_int32] = 23
+
+    extension_repeated = more_extensions_pb2.repeated_int_extension
+    extendee_proto.Extensions[extension_repeated].append(11)
+
+    extension_msg = more_extensions_pb2.optional_message_extension
+    extendee_proto.Extensions[extension_msg].foreign_message_int = 56
+
+    self.assertEqual(len(extendee_proto.Extensions), 3)
+    del extendee_proto.Extensions[extension_msg]
+    self.assertEqual(len(extendee_proto.Extensions), 2)
+    del extendee_proto.Extensions[extension_repeated]
+    self.assertEqual(len(extendee_proto.Extensions), 1)
+    # Delete a none exist extension. It is OK to "del m.Extensions[ext]"
+    # even if the extension is not present in the message; we don't
+    # raise KeyError. This is consistent with "m.Extensions[ext]"
+    # returning a default value even if we did not set anything.
+    del extendee_proto.Extensions[extension_repeated]
+    self.assertEqual(len(extendee_proto.Extensions), 1)
+    del extendee_proto.Extensions[extension_int32]
+    self.assertEqual(len(extendee_proto.Extensions), 0)
+
+  def testExtensionIter(self):
+    extendee_proto = more_extensions_pb2.ExtendedMessage()
+
+    extension_int32 = more_extensions_pb2.optional_int_extension
+    extendee_proto.Extensions[extension_int32] = 23
+
+    extension_repeated = more_extensions_pb2.repeated_int_extension
+    extendee_proto.Extensions[extension_repeated].append(11)
+
+    extension_msg = more_extensions_pb2.optional_message_extension
+    extendee_proto.Extensions[extension_msg].foreign_message_int = 56
+
+    # Set some normal fields.
+    extendee_proto.optional_int32 = 1
+    extendee_proto.repeated_string.append('hi')
+
+    expected = (extension_int32, extension_msg, extension_repeated)
+    count = 0
+    for item in extendee_proto.Extensions:
+      self.assertEqual(item.name, expected[count].name)
+      self.assertIn(item, extendee_proto.Extensions)
+      count += 1
+    self.assertEqual(count, 3)
+
+  def testExtensionContainsError(self):
+    extendee_proto = more_extensions_pb2.ExtendedMessage()
+    self.assertRaises(KeyError, extendee_proto.Extensions.__contains__, 0)
+
+    field = more_extensions_pb2.ExtendedMessage.DESCRIPTOR.fields_by_name[
+        'optional_int32']
+    self.assertRaises(KeyError, extendee_proto.Extensions.__contains__, field)
+
+  def testTopLevelExtensionsForOptionalScalar(self):
+    extendee_proto = unittest_pb2.TestAllExtensions()
+    extension = unittest_pb2.optional_int32_extension
+    self.assertFalse(extendee_proto.HasExtension(extension))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+    self.assertEqual(0, extendee_proto.Extensions[extension])
+    # As with normal scalar fields, just doing a read doesn't actually set the
+    # "has" bit.
+    self.assertFalse(extendee_proto.HasExtension(extension))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+    # Actually set the thing.
+    extendee_proto.Extensions[extension] = 23
+    self.assertEqual(23, extendee_proto.Extensions[extension])
+    self.assertTrue(extendee_proto.HasExtension(extension))
+    self.assertIn(extension, extendee_proto.Extensions)
+    # Ensure that clearing works as well.
+    extendee_proto.ClearExtension(extension)
+    self.assertEqual(0, extendee_proto.Extensions[extension])
+    self.assertFalse(extendee_proto.HasExtension(extension))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+
+  def testTopLevelExtensionsForRepeatedScalar(self):
+    extendee_proto = unittest_pb2.TestAllExtensions()
+    extension = unittest_pb2.repeated_string_extension
+    self.assertEqual(0, len(extendee_proto.Extensions[extension]))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+    extendee_proto.Extensions[extension].append('foo')
+    self.assertEqual(['foo'], extendee_proto.Extensions[extension])
+    self.assertIn(extension, extendee_proto.Extensions)
+    string_list = extendee_proto.Extensions[extension]
+    extendee_proto.ClearExtension(extension)
+    self.assertEqual(0, len(extendee_proto.Extensions[extension]))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+    self.assertIsNot(string_list, extendee_proto.Extensions[extension])
+    # Shouldn't be allowed to do Extensions[extension] = 'a'
+    self.assertRaises(TypeError, operator.setitem, extendee_proto.Extensions,
+                      extension, 'a')
+
+  def testTopLevelExtensionsForOptionalMessage(self):
+    extendee_proto = unittest_pb2.TestAllExtensions()
+    extension = unittest_pb2.optional_foreign_message_extension
+    self.assertFalse(extendee_proto.HasExtension(extension))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+    self.assertEqual(0, extendee_proto.Extensions[extension].c)
+    # As with normal (non-extension) fields, merely reading from the
+    # thing shouldn't set the "has" bit.
+    self.assertFalse(extendee_proto.HasExtension(extension))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+    extendee_proto.Extensions[extension].c = 23
+    self.assertEqual(23, extendee_proto.Extensions[extension].c)
+    self.assertTrue(extendee_proto.HasExtension(extension))
+    self.assertIn(extension, extendee_proto.Extensions)
+    # Save a reference here.
+    foreign_message = extendee_proto.Extensions[extension]
+    extendee_proto.ClearExtension(extension)
+    self.assertIsNot(foreign_message, extendee_proto.Extensions[extension])
+    # Setting a field on foreign_message now shouldn't set
+    # any "has" bits on extendee_proto.
+    foreign_message.c = 42
+    self.assertEqual(42, foreign_message.c)
+    self.assertTrue(foreign_message.HasField('c'))
+    self.assertFalse(extendee_proto.HasExtension(extension))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+    # Shouldn't be allowed to do Extensions[extension] = 'a'
+    self.assertRaises(TypeError, operator.setitem, extendee_proto.Extensions,
+                      extension, 'a')
+
+  def testTopLevelExtensionsForRepeatedMessage(self):
+    extendee_proto = unittest_pb2.TestAllExtensions()
+    extension = unittest_pb2.repeatedgroup_extension
+    self.assertEqual(0, len(extendee_proto.Extensions[extension]))
+    group = extendee_proto.Extensions[extension].add()
+    group.a = 23
+    self.assertEqual(23, extendee_proto.Extensions[extension][0].a)
+    group.a = 42
+    self.assertEqual(42, extendee_proto.Extensions[extension][0].a)
+    group_list = extendee_proto.Extensions[extension]
+    extendee_proto.ClearExtension(extension)
+    self.assertEqual(0, len(extendee_proto.Extensions[extension]))
+    self.assertIsNot(group_list, extendee_proto.Extensions[extension])
+    # Shouldn't be allowed to do Extensions[extension] = 'a'
+    self.assertRaises(TypeError, operator.setitem, extendee_proto.Extensions,
+                      extension, 'a')
+
+  def testNestedExtensions(self):
+    extendee_proto = unittest_pb2.TestAllExtensions()
+    extension = unittest_pb2.TestRequired.single
+
+    # We just test the non-repeated case.
+    self.assertFalse(extendee_proto.HasExtension(extension))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+    required = extendee_proto.Extensions[extension]
+    self.assertEqual(0, required.a)
+    self.assertFalse(extendee_proto.HasExtension(extension))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+    required.a = 23
+    self.assertEqual(23, extendee_proto.Extensions[extension].a)
+    self.assertTrue(extendee_proto.HasExtension(extension))
+    self.assertIn(extension, extendee_proto.Extensions)
+    extendee_proto.ClearExtension(extension)
+    self.assertIsNot(required, extendee_proto.Extensions[extension])
+    self.assertFalse(extendee_proto.HasExtension(extension))
+    self.assertNotIn(extension, extendee_proto.Extensions)
+
+  def testRegisteredExtensions(self):
+    pool = unittest_pb2.DESCRIPTOR.pool
+    self.assertTrue(
+        pool.FindExtensionByNumber(
+            unittest_pb2.TestAllExtensions.DESCRIPTOR, 1))
+    self.assertIs(
+        pool.FindExtensionByName(
+            'protobuf_unittest.optional_int32_extension').containing_type,
+        unittest_pb2.TestAllExtensions.DESCRIPTOR)
+    # Make sure extensions haven't been registered into types that shouldn't
+    # have any.
+    self.assertEqual(0, len(
+        pool.FindAllExtensions(unittest_pb2.TestAllTypes.DESCRIPTOR)))
+
+  # If message A directly contains message B, and
+  # a.HasField('b') is currently False, then mutating any
+  # extension in B should change a.HasField('b') to True
+  # (and so on up the object tree).
+  def testHasBitsForAncestorsOfExtendedMessage(self):
+    # Optional scalar extension.
+    toplevel = more_extensions_pb2.TopLevelMessage()
+    self.assertFalse(toplevel.HasField('submessage'))
+    self.assertEqual(0, toplevel.submessage.Extensions[
+        more_extensions_pb2.optional_int_extension])
+    self.assertFalse(toplevel.HasField('submessage'))
+    toplevel.submessage.Extensions[
+        more_extensions_pb2.optional_int_extension] = 23
+    self.assertEqual(23, toplevel.submessage.Extensions[
+        more_extensions_pb2.optional_int_extension])
+    self.assertTrue(toplevel.HasField('submessage'))
+
+    # Repeated scalar extension.
+    toplevel = more_extensions_pb2.TopLevelMessage()
+    self.assertFalse(toplevel.HasField('submessage'))
+    self.assertEqual([], toplevel.submessage.Extensions[
+        more_extensions_pb2.repeated_int_extension])
+    self.assertFalse(toplevel.HasField('submessage'))
+    toplevel.submessage.Extensions[
+        more_extensions_pb2.repeated_int_extension].append(23)
+    self.assertEqual([23], toplevel.submessage.Extensions[
+        more_extensions_pb2.repeated_int_extension])
+    self.assertTrue(toplevel.HasField('submessage'))
+
+    # Optional message extension.
+    toplevel = more_extensions_pb2.TopLevelMessage()
+    self.assertFalse(toplevel.HasField('submessage'))
+    self.assertEqual(0, toplevel.submessage.Extensions[
+        more_extensions_pb2.optional_message_extension].foreign_message_int)
+    self.assertFalse(toplevel.HasField('submessage'))
+    toplevel.submessage.Extensions[
+        more_extensions_pb2.optional_message_extension].foreign_message_int = 23
+    self.assertEqual(23, toplevel.submessage.Extensions[
+        more_extensions_pb2.optional_message_extension].foreign_message_int)
+    self.assertTrue(toplevel.HasField('submessage'))
+
+    # Repeated message extension.
+    toplevel = more_extensions_pb2.TopLevelMessage()
+    self.assertFalse(toplevel.HasField('submessage'))
+    self.assertEqual(0, len(toplevel.submessage.Extensions[
+        more_extensions_pb2.repeated_message_extension]))
+    self.assertFalse(toplevel.HasField('submessage'))
+    foreign = toplevel.submessage.Extensions[
+        more_extensions_pb2.repeated_message_extension].add()
+    self.assertEqual(foreign, toplevel.submessage.Extensions[
+        more_extensions_pb2.repeated_message_extension][0])
+    self.assertTrue(toplevel.HasField('submessage'))
+
+  def testDisconnectionAfterClearingEmptyMessage(self):
+    toplevel = more_extensions_pb2.TopLevelMessage()
+    extendee_proto = toplevel.submessage
+    extension = more_extensions_pb2.optional_message_extension
+    extension_proto = extendee_proto.Extensions[extension]
+    extendee_proto.ClearExtension(extension)
+    extension_proto.foreign_message_int = 23
+
+    self.assertIsNot(extension_proto, extendee_proto.Extensions[extension])
+
+  def testExtensionFailureModes(self):
+    extendee_proto = unittest_pb2.TestAllExtensions()
+
+    # Try non-extension-handle arguments to HasExtension,
+    # ClearExtension(), and Extensions[]...
+    self.assertRaises(KeyError, extendee_proto.HasExtension, 1234)
+    self.assertRaises(KeyError, extendee_proto.ClearExtension, 1234)
+    self.assertRaises(KeyError, extendee_proto.Extensions.__getitem__, 1234)
+    self.assertRaises(KeyError, extendee_proto.Extensions.__setitem__, 1234, 5)
+
+    # Try something that *is* an extension handle, just not for
+    # this message...
+    for unknown_handle in (more_extensions_pb2.optional_int_extension,
+                           more_extensions_pb2.optional_message_extension,
+                           more_extensions_pb2.repeated_int_extension,
+                           more_extensions_pb2.repeated_message_extension):
+      self.assertRaises(KeyError, extendee_proto.HasExtension,
+                        unknown_handle)
+      self.assertRaises(KeyError, extendee_proto.ClearExtension,
+                        unknown_handle)
+      self.assertRaises(KeyError, extendee_proto.Extensions.__getitem__,
+                        unknown_handle)
+      self.assertRaises(KeyError, extendee_proto.Extensions.__setitem__,
+                        unknown_handle, 5)
+
+    # Try call HasExtension() with a valid handle, but for a
+    # *repeated* field.  (Just as with non-extension repeated
+    # fields, Has*() isn't supported for extension repeated fields).
+    self.assertRaises(KeyError, extendee_proto.HasExtension,
+                      unittest_pb2.repeated_string_extension)
+
+  def testMergeFromOptionalGroup(self):
+    # Test merge with an optional group.
+    proto1 = unittest_pb2.TestAllTypes()
+    proto1.optionalgroup.a = 12
+    proto2 = unittest_pb2.TestAllTypes()
+    proto2.MergeFrom(proto1)
+    self.assertEqual(12, proto2.optionalgroup.a)
+
+  def testMergeFromExtensionsSingular(self):
+    proto1 = unittest_pb2.TestAllExtensions()
+    proto1.Extensions[unittest_pb2.optional_int32_extension] = 1
+
+    proto2 = unittest_pb2.TestAllExtensions()
+    proto2.MergeFrom(proto1)
+    self.assertEqual(
+        1, proto2.Extensions[unittest_pb2.optional_int32_extension])
+
+  def testMergeFromExtensionsRepeated(self):
+    proto1 = unittest_pb2.TestAllExtensions()
+    proto1.Extensions[unittest_pb2.repeated_int32_extension].append(1)
+    proto1.Extensions[unittest_pb2.repeated_int32_extension].append(2)
+
+    proto2 = unittest_pb2.TestAllExtensions()
+    proto2.Extensions[unittest_pb2.repeated_int32_extension].append(0)
+    proto2.MergeFrom(proto1)
+    self.assertEqual(
+        3, len(proto2.Extensions[unittest_pb2.repeated_int32_extension]))
+    self.assertEqual(
+        0, proto2.Extensions[unittest_pb2.repeated_int32_extension][0])
+    self.assertEqual(
+        1, proto2.Extensions[unittest_pb2.repeated_int32_extension][1])
+    self.assertEqual(
+        2, proto2.Extensions[unittest_pb2.repeated_int32_extension][2])
+
+  def testMergeFromExtensionsNestedMessage(self):
+    proto1 = unittest_pb2.TestAllExtensions()
+    ext1 = proto1.Extensions[
+        unittest_pb2.repeated_nested_message_extension]
+    m = ext1.add()
+    m.bb = 222
+    m = ext1.add()
+    m.bb = 333
+
+    proto2 = unittest_pb2.TestAllExtensions()
+    ext2 = proto2.Extensions[
+        unittest_pb2.repeated_nested_message_extension]
+    m = ext2.add()
+    m.bb = 111
+
+    proto2.MergeFrom(proto1)
+    ext2 = proto2.Extensions[
+        unittest_pb2.repeated_nested_message_extension]
+    self.assertEqual(3, len(ext2))
+    self.assertEqual(111, ext2[0].bb)
+    self.assertEqual(222, ext2[1].bb)
+    self.assertEqual(333, ext2[2].bb)
+
+  def testCopyFromBadType(self):
+    # The python implementation doesn't raise an exception in this
+    # case. In theory it should.
+    if api_implementation.Type() == 'python':
+      return
+    proto1 = unittest_pb2.TestAllTypes()
+    proto2 = unittest_pb2.TestAllExtensions()
+    self.assertRaises(TypeError, proto1.CopyFrom, proto2)
+
+  def testClear(self):
+    proto = unittest_pb2.TestAllTypes()
+    # C++ implementation does not support lazy fields right now so leave it
+    # out for now.
+    if api_implementation.Type() == 'python':
+      test_util.SetAllFields(proto)
+    else:
+      test_util.SetAllNonLazyFields(proto)
+    # Clear the message.
+    proto.Clear()
+    self.assertEqual(proto.ByteSize(), 0)
+    empty_proto = unittest_pb2.TestAllTypes()
+    self.assertEqual(proto, empty_proto)
+
+    # Test if extensions which were set are cleared.
+    proto = unittest_pb2.TestAllExtensions()
+    test_util.SetAllExtensions(proto)
+    # Clear the message.
+    proto.Clear()
+    self.assertEqual(proto.ByteSize(), 0)
+    empty_proto = unittest_pb2.TestAllExtensions()
+    self.assertEqual(proto, empty_proto)
+
+  def testDisconnectingInOneof(self):
+    m = unittest_pb2.TestOneof2()  # This message has two messages in a oneof.
+    m.foo_message.qux_int = 5
+    sub_message = m.foo_message
+    # Accessing another message's field does not clear the first one
+    self.assertEqual(m.foo_lazy_message.qux_int, 0)
+    self.assertEqual(m.foo_message.qux_int, 5)
+    # But mutating another message in the oneof detaches the first one.
+    m.foo_lazy_message.qux_int = 6
+    self.assertEqual(m.foo_message.qux_int, 0)
+    # The reference we got above was detached and is still valid.
+    self.assertEqual(sub_message.qux_int, 5)
+    sub_message.qux_int = 7
+
+  def assertInitialized(self, proto):
+    self.assertTrue(proto.IsInitialized())
+    # Neither method should raise an exception.
+    proto.SerializeToString()
+    proto.SerializePartialToString()
+
+  def assertNotInitialized(self, proto, error_size=None):
+    errors = []
+    self.assertFalse(proto.IsInitialized())
+    self.assertFalse(proto.IsInitialized(errors))
+    self.assertEqual(error_size, len(errors))
+    self.assertRaises(message.EncodeError, proto.SerializeToString)
+    # "Partial" serialization doesn't care if message is uninitialized.
+    proto.SerializePartialToString()
+
+  def testIsInitialized(self):
+    # Trivial cases - all optional fields and extensions.
+    proto = unittest_pb2.TestAllTypes()
+    self.assertInitialized(proto)
+    proto = unittest_pb2.TestAllExtensions()
+    self.assertInitialized(proto)
+
+    # The case of uninitialized required fields.
+    proto = unittest_pb2.TestRequired()
+    self.assertNotInitialized(proto, 3)
+    proto.a = proto.b = proto.c = 2
+    self.assertInitialized(proto)
+
+    # The case of uninitialized submessage.
+    proto = unittest_pb2.TestRequiredForeign()
+    self.assertInitialized(proto)
+    proto.optional_message.a = 1
+    self.assertNotInitialized(proto, 2)
+    proto.optional_message.b = 0
+    proto.optional_message.c = 0
+    self.assertInitialized(proto)
+
+    # Uninitialized repeated submessage.
+    message1 = proto.repeated_message.add()
+    self.assertNotInitialized(proto, 3)
+    message1.a = message1.b = message1.c = 0
+    self.assertInitialized(proto)
+
+    # Uninitialized repeated group in an extension.
+    proto = unittest_pb2.TestAllExtensions()
+    extension = unittest_pb2.TestRequired.multi
+    message1 = proto.Extensions[extension].add()
+    message2 = proto.Extensions[extension].add()
+    self.assertNotInitialized(proto, 6)
+    message1.a = 1
+    message1.b = 1
+    message1.c = 1
+    self.assertNotInitialized(proto, 3)
+    message2.a = 2
+    message2.b = 2
+    message2.c = 2
+    self.assertInitialized(proto)
+
+    # Uninitialized nonrepeated message in an extension.
+    proto = unittest_pb2.TestAllExtensions()
+    extension = unittest_pb2.TestRequired.single
+    proto.Extensions[extension].a = 1
+    self.assertNotInitialized(proto, 2)
+    proto.Extensions[extension].b = 2
+    proto.Extensions[extension].c = 3
+    self.assertInitialized(proto)
+
+    # Try passing an errors list.
+    errors = []
+    proto = unittest_pb2.TestRequired()
+    self.assertFalse(proto.IsInitialized(errors))
+    self.assertEqual(errors, ['a', 'b', 'c'])
+    self.assertRaises(TypeError, proto.IsInitialized, 1, 2, 3)
+
+  @unittest.skipIf(
+      api_implementation.Type() != 'cpp' or api_implementation.Version() != 2,
+      'Errors are only available from the most recent C++ implementation.')
+  def testFileDescriptorErrors(self):
+    file_name = 'test_file_descriptor_errors.proto'
+    package_name = 'test_file_descriptor_errors.proto'
+    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
+    file_descriptor_proto.name = file_name
+    file_descriptor_proto.package = package_name
+    m1 = file_descriptor_proto.message_type.add()
+    m1.name = 'msg1'
+    # Compiles the proto into the C++ descriptor pool
+    descriptor.FileDescriptor(
+        file_name,
+        package_name,
+        serialized_pb=file_descriptor_proto.SerializeToString())
+    # Add a FileDescriptorProto that has duplicate symbols
+    another_file_name = 'another_test_file_descriptor_errors.proto'
+    file_descriptor_proto.name = another_file_name
+    m2 = file_descriptor_proto.message_type.add()
+    m2.name = 'msg2'
+    with self.assertRaises(TypeError) as cm:
+      descriptor.FileDescriptor(
+          another_file_name,
+          package_name,
+          serialized_pb=file_descriptor_proto.SerializeToString())
+      self.assertTrue(hasattr(cm, 'exception'), '%s not raised' %
+                      getattr(cm.expected, '__name__', cm.expected))
+      self.assertIn('test_file_descriptor_errors.proto', str(cm.exception))
+      # Error message will say something about this definition being a
+      # duplicate, though we don't check the message exactly to avoid a
+      # dependency on the C++ logging code.
+      self.assertIn('test_file_descriptor_errors.msg1', str(cm.exception))
+
+  def testStringUTF8Serialization(self):
+    proto = message_set_extensions_pb2.TestMessageSet()
+    extension_message = message_set_extensions_pb2.TestMessageSetExtension2
+    extension = extension_message.message_set_extension
+
+    test_utf8 = u'Тест'
+    test_utf8_bytes = test_utf8.encode('utf-8')
+
+    # 'Test' in another language, using UTF-8 charset.
+    proto.Extensions[extension].str = test_utf8
+
+    # Serialize using the MessageSet wire format (this is specified in the
+    # .proto file).
+    serialized = proto.SerializeToString()
+
+    # Check byte size.
+    self.assertEqual(proto.ByteSize(), len(serialized))
+
+    raw = unittest_mset_pb2.RawMessageSet()
+    bytes_read = raw.MergeFromString(serialized)
+    self.assertEqual(len(serialized), bytes_read)
+
+    message2 = message_set_extensions_pb2.TestMessageSetExtension2()
+
+    self.assertEqual(1, len(raw.item))
+    # Check that the type_id is the same as the tag ID in the .proto file.
+    self.assertEqual(raw.item[0].type_id, 98418634)
+
+    # Check the actual bytes on the wire.
+    self.assertTrue(raw.item[0].message.endswith(test_utf8_bytes))
+    bytes_read = message2.MergeFromString(raw.item[0].message)
+    self.assertEqual(len(raw.item[0].message), bytes_read)
+
+    self.assertEqual(type(message2.str), six.text_type)
+    self.assertEqual(message2.str, test_utf8)
+
+    # The pure Python API throws an exception on MergeFromString(),
+    # if any of the string fields of the message can't be UTF-8 decoded.
+    # The C++ implementation of the API has no way to check that on
+    # MergeFromString and thus has no way to throw the exception.
+    #
+    # The pure Python API always returns objects of type 'unicode' (UTF-8
+    # encoded), or 'bytes' (in 7 bit ASCII).
+    badbytes = raw.item[0].message.replace(
+        test_utf8_bytes, len(test_utf8_bytes) * b'\xff')
+
+    unicode_decode_failed = False
+    try:
+      message2.MergeFromString(badbytes)
+    except UnicodeDecodeError:
+      unicode_decode_failed = True
+    string_field = message2.str
+    self.assertTrue(unicode_decode_failed or type(string_field) is bytes)
+
+  def testSetInParent(self):
+    proto = unittest_pb2.TestAllTypes()
+    self.assertFalse(proto.HasField('optionalgroup'))
+    proto.optionalgroup.SetInParent()
+    self.assertTrue(proto.HasField('optionalgroup'))
+
+  def testPackageInitializationImport(self):
+    """Test that we can import nested messages from their __init__.py.
+
+    Such setup is not trivial since at the time of processing of __init__.py one
+    can't refer to its submodules by name in code, so expressions like
+    google.protobuf.internal.import_test_package.inner_pb2
+    don't work. They do work in imports, so we have assign an alias at import
+    and then use that alias in generated code.
+    """
+    # We import here since it's the import that used to fail, and we want
+    # the failure to have the right context.
+    # pylint: disable=g-import-not-at-top
+    from google.protobuf.internal import import_test_package
+    # pylint: enable=g-import-not-at-top
+    msg = import_test_package.myproto.Outer()
+    # Just check the default value.
+    self.assertEqual(57, msg.inner.value)
+
+#  Since we had so many tests for protocol buffer equality, we broke these out
+#  into separate TestCase classes.
+
+
+@testing_refleaks.TestCase
+class TestAllTypesEqualityTest(unittest.TestCase):
+
+  def setUp(self):
+    self.first_proto = unittest_pb2.TestAllTypes()
+    self.second_proto = unittest_pb2.TestAllTypes()
+
+  def testNotHashable(self):
+    self.assertRaises(TypeError, hash, self.first_proto)
+
+  def testSelfEquality(self):
+    self.assertEqual(self.first_proto, self.first_proto)
+
+  def testEmptyProtosEqual(self):
+    self.assertEqual(self.first_proto, self.second_proto)
+
+
+@testing_refleaks.TestCase
+class FullProtosEqualityTest(unittest.TestCase):
+
+  """Equality tests using completely-full protos as a starting point."""
+
+  def setUp(self):
+    self.first_proto = unittest_pb2.TestAllTypes()
+    self.second_proto = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(self.first_proto)
+    test_util.SetAllFields(self.second_proto)
+
+  def testNotHashable(self):
+    self.assertRaises(TypeError, hash, self.first_proto)
+
+  def testNoneNotEqual(self):
+    self.assertNotEqual(self.first_proto, None)
+    self.assertNotEqual(None, self.second_proto)
+
+  def testNotEqualToOtherMessage(self):
+    third_proto = unittest_pb2.TestRequired()
+    self.assertNotEqual(self.first_proto, third_proto)
+    self.assertNotEqual(third_proto, self.second_proto)
+
+  def testAllFieldsFilledEquality(self):
+    self.assertEqual(self.first_proto, self.second_proto)
+
+  def testNonRepeatedScalar(self):
+    # Nonrepeated scalar field change should cause inequality.
+    self.first_proto.optional_int32 += 1
+    self.assertNotEqual(self.first_proto, self.second_proto)
+    # ...as should clearing a field.
+    self.first_proto.ClearField('optional_int32')
+    self.assertNotEqual(self.first_proto, self.second_proto)
+
+  def testNonRepeatedComposite(self):
+    # Change a nonrepeated composite field.
+    self.first_proto.optional_nested_message.bb += 1
+    self.assertNotEqual(self.first_proto, self.second_proto)
+    self.first_proto.optional_nested_message.bb -= 1
+    self.assertEqual(self.first_proto, self.second_proto)
+    # Clear a field in the nested message.
+    self.first_proto.optional_nested_message.ClearField('bb')
+    self.assertNotEqual(self.first_proto, self.second_proto)
+    self.first_proto.optional_nested_message.bb = (
+        self.second_proto.optional_nested_message.bb)
+    self.assertEqual(self.first_proto, self.second_proto)
+    # Remove the nested message entirely.
+    self.first_proto.ClearField('optional_nested_message')
+    self.assertNotEqual(self.first_proto, self.second_proto)
+
+  def testRepeatedScalar(self):
+    # Change a repeated scalar field.
+    self.first_proto.repeated_int32.append(5)
+    self.assertNotEqual(self.first_proto, self.second_proto)
+    self.first_proto.ClearField('repeated_int32')
+    self.assertNotEqual(self.first_proto, self.second_proto)
+
+  def testRepeatedComposite(self):
+    # Change value within a repeated composite field.
+    self.first_proto.repeated_nested_message[0].bb += 1
+    self.assertNotEqual(self.first_proto, self.second_proto)
+    self.first_proto.repeated_nested_message[0].bb -= 1
+    self.assertEqual(self.first_proto, self.second_proto)
+    # Add a value to a repeated composite field.
+    self.first_proto.repeated_nested_message.add()
+    self.assertNotEqual(self.first_proto, self.second_proto)
+    self.second_proto.repeated_nested_message.add()
+    self.assertEqual(self.first_proto, self.second_proto)
+
+  def testNonRepeatedScalarHasBits(self):
+    # Ensure that we test "has" bits as well as value for
+    # nonrepeated scalar field.
+    self.first_proto.ClearField('optional_int32')
+    self.second_proto.optional_int32 = 0
+    self.assertNotEqual(self.first_proto, self.second_proto)
+
+  def testNonRepeatedCompositeHasBits(self):
+    # Ensure that we test "has" bits as well as value for
+    # nonrepeated composite field.
+    self.first_proto.ClearField('optional_nested_message')
+    self.second_proto.optional_nested_message.ClearField('bb')
+    self.assertNotEqual(self.first_proto, self.second_proto)
+    self.first_proto.optional_nested_message.bb = 0
+    self.first_proto.optional_nested_message.ClearField('bb')
+    self.assertEqual(self.first_proto, self.second_proto)
+
+
+@testing_refleaks.TestCase
+class ExtensionEqualityTest(unittest.TestCase):
+
+  def testExtensionEquality(self):
+    first_proto = unittest_pb2.TestAllExtensions()
+    second_proto = unittest_pb2.TestAllExtensions()
+    self.assertEqual(first_proto, second_proto)
+    test_util.SetAllExtensions(first_proto)
+    self.assertNotEqual(first_proto, second_proto)
+    test_util.SetAllExtensions(second_proto)
+    self.assertEqual(first_proto, second_proto)
+
+    # Ensure that we check value equality.
+    first_proto.Extensions[unittest_pb2.optional_int32_extension] += 1
+    self.assertNotEqual(first_proto, second_proto)
+    first_proto.Extensions[unittest_pb2.optional_int32_extension] -= 1
+    self.assertEqual(first_proto, second_proto)
+
+    # Ensure that we also look at "has" bits.
+    first_proto.ClearExtension(unittest_pb2.optional_int32_extension)
+    second_proto.Extensions[unittest_pb2.optional_int32_extension] = 0
+    self.assertNotEqual(first_proto, second_proto)
+    first_proto.Extensions[unittest_pb2.optional_int32_extension] = 0
+    self.assertEqual(first_proto, second_proto)
+
+    # Ensure that differences in cached values
+    # don't matter if "has" bits are both false.
+    first_proto = unittest_pb2.TestAllExtensions()
+    second_proto = unittest_pb2.TestAllExtensions()
+    self.assertEqual(
+        0, first_proto.Extensions[unittest_pb2.optional_int32_extension])
+    self.assertEqual(first_proto, second_proto)
+
+
+@testing_refleaks.TestCase
+class MutualRecursionEqualityTest(unittest.TestCase):
+
+  def testEqualityWithMutualRecursion(self):
+    first_proto = unittest_pb2.TestMutualRecursionA()
+    second_proto = unittest_pb2.TestMutualRecursionA()
+    self.assertEqual(first_proto, second_proto)
+    first_proto.bb.a.bb.optional_int32 = 23
+    self.assertNotEqual(first_proto, second_proto)
+    second_proto.bb.a.bb.optional_int32 = 23
+    self.assertEqual(first_proto, second_proto)
+
+
+@testing_refleaks.TestCase
+class ByteSizeTest(unittest.TestCase):
+
+  def setUp(self):
+    self.proto = unittest_pb2.TestAllTypes()
+    self.extended_proto = more_extensions_pb2.ExtendedMessage()
+    self.packed_proto = unittest_pb2.TestPackedTypes()
+    self.packed_extended_proto = unittest_pb2.TestPackedExtensions()
+
+  def Size(self):
+    return self.proto.ByteSize()
+
+  def testEmptyMessage(self):
+    self.assertEqual(0, self.proto.ByteSize())
+
+  def testSizedOnKwargs(self):
+    # Use a separate message to ensure testing right after creation.
+    proto = unittest_pb2.TestAllTypes()
+    self.assertEqual(0, proto.ByteSize())
+    proto_kwargs = unittest_pb2.TestAllTypes(optional_int64 = 1)
+    # One byte for the tag, one to encode varint 1.
+    self.assertEqual(2, proto_kwargs.ByteSize())
+
+  def testVarints(self):
+    def Test(i, expected_varint_size):
+      self.proto.Clear()
+      self.proto.optional_int64 = i
+      # Add one to the varint size for the tag info
+      # for tag 1.
+      self.assertEqual(expected_varint_size + 1, self.Size())
+    Test(0, 1)
+    Test(1, 1)
+    for i, num_bytes in zip(range(7, 63, 7), range(1, 10000)):
+      Test((1 << i) - 1, num_bytes)
+    Test(-1, 10)
+    Test(-2, 10)
+    Test(-(1 << 63), 10)
+
+  def testStrings(self):
+    self.proto.optional_string = ''
+    # Need one byte for tag info (tag #14), and one byte for length.
+    self.assertEqual(2, self.Size())
+
+    self.proto.optional_string = 'abc'
+    # Need one byte for tag info (tag #14), and one byte for length.
+    self.assertEqual(2 + len(self.proto.optional_string), self.Size())
+
+    self.proto.optional_string = 'x' * 128
+    # Need one byte for tag info (tag #14), and TWO bytes for length.
+    self.assertEqual(3 + len(self.proto.optional_string), self.Size())
+
+  def testOtherNumerics(self):
+    self.proto.optional_fixed32 = 1234
+    # One byte for tag and 4 bytes for fixed32.
+    self.assertEqual(5, self.Size())
+    self.proto = unittest_pb2.TestAllTypes()
+
+    self.proto.optional_fixed64 = 1234
+    # One byte for tag and 8 bytes for fixed64.
+    self.assertEqual(9, self.Size())
+    self.proto = unittest_pb2.TestAllTypes()
+
+    self.proto.optional_float = 1.234
+    # One byte for tag and 4 bytes for float.
+    self.assertEqual(5, self.Size())
+    self.proto = unittest_pb2.TestAllTypes()
+
+    self.proto.optional_double = 1.234
+    # One byte for tag and 8 bytes for float.
+    self.assertEqual(9, self.Size())
+    self.proto = unittest_pb2.TestAllTypes()
+
+    self.proto.optional_sint32 = 64
+    # One byte for tag and 2 bytes for zig-zag-encoded 64.
+    self.assertEqual(3, self.Size())
+    self.proto = unittest_pb2.TestAllTypes()
+
+  def testComposites(self):
+    # 3 bytes.
+    self.proto.optional_nested_message.bb = (1 << 14)
+    # Plus one byte for bb tag.
+    # Plus 1 byte for optional_nested_message serialized size.
+    # Plus two bytes for optional_nested_message tag.
+    self.assertEqual(3 + 1 + 1 + 2, self.Size())
+
+  def testGroups(self):
+    # 4 bytes.
+    self.proto.optionalgroup.a = (1 << 21)
+    # Plus two bytes for |a| tag.
+    # Plus 2 * two bytes for START_GROUP and END_GROUP tags.
+    self.assertEqual(4 + 2 + 2*2, self.Size())
+
+  def testRepeatedScalars(self):
+    self.proto.repeated_int32.append(10)  # 1 byte.
+    self.proto.repeated_int32.append(128)  # 2 bytes.
+    # Also need 2 bytes for each entry for tag.
+    self.assertEqual(1 + 2 + 2*2, self.Size())
+
+  def testRepeatedScalarsExtend(self):
+    self.proto.repeated_int32.extend([10, 128])  # 3 bytes.
+    # Also need 2 bytes for each entry for tag.
+    self.assertEqual(1 + 2 + 2*2, self.Size())
+
+  def testRepeatedScalarsRemove(self):
+    self.proto.repeated_int32.append(10)  # 1 byte.
+    self.proto.repeated_int32.append(128)  # 2 bytes.
+    # Also need 2 bytes for each entry for tag.
+    self.assertEqual(1 + 2 + 2*2, self.Size())
+    self.proto.repeated_int32.remove(128)
+    self.assertEqual(1 + 2, self.Size())
+
+  def testRepeatedComposites(self):
+    # Empty message.  2 bytes tag plus 1 byte length.
+    foreign_message_0 = self.proto.repeated_nested_message.add()
+    # 2 bytes tag plus 1 byte length plus 1 byte bb tag 1 byte int.
+    foreign_message_1 = self.proto.repeated_nested_message.add()
+    foreign_message_1.bb = 7
+    self.assertEqual(2 + 1 + 2 + 1 + 1 + 1, self.Size())
+
+  def testRepeatedCompositesDelete(self):
+    # Empty message.  2 bytes tag plus 1 byte length.
+    foreign_message_0 = self.proto.repeated_nested_message.add()
+    # 2 bytes tag plus 1 byte length plus 1 byte bb tag 1 byte int.
+    foreign_message_1 = self.proto.repeated_nested_message.add()
+    foreign_message_1.bb = 9
+    self.assertEqual(2 + 1 + 2 + 1 + 1 + 1, self.Size())
+    repeated_nested_message = copy.deepcopy(
+        self.proto.repeated_nested_message)
+
+    # 2 bytes tag plus 1 byte length plus 1 byte bb tag 1 byte int.
+    del self.proto.repeated_nested_message[0]
+    self.assertEqual(2 + 1 + 1 + 1, self.Size())
+
+    # Now add a new message.
+    foreign_message_2 = self.proto.repeated_nested_message.add()
+    foreign_message_2.bb = 12
+
+    # 2 bytes tag plus 1 byte length plus 1 byte bb tag 1 byte int.
+    # 2 bytes tag plus 1 byte length plus 1 byte bb tag 1 byte int.
+    self.assertEqual(2 + 1 + 1 + 1 + 2 + 1 + 1 + 1, self.Size())
+
+    # 2 bytes tag plus 1 byte length plus 1 byte bb tag 1 byte int.
+    del self.proto.repeated_nested_message[1]
+    self.assertEqual(2 + 1 + 1 + 1, self.Size())
+
+    del self.proto.repeated_nested_message[0]
+    self.assertEqual(0, self.Size())
+
+    self.assertEqual(2, len(repeated_nested_message))
+    del repeated_nested_message[0:1]
+    # TODO(jieluo): Fix cpp extension bug when delete repeated message.
+    if api_implementation.Type() == 'python':
+      self.assertEqual(1, len(repeated_nested_message))
+    del repeated_nested_message[-1]
+    # TODO(jieluo): Fix cpp extension bug when delete repeated message.
+    if api_implementation.Type() == 'python':
+      self.assertEqual(0, len(repeated_nested_message))
+
+  def testRepeatedGroups(self):
+    # 2-byte START_GROUP plus 2-byte END_GROUP.
+    group_0 = self.proto.repeatedgroup.add()
+    # 2-byte START_GROUP plus 2-byte |a| tag + 1-byte |a|
+    # plus 2-byte END_GROUP.
+    group_1 = self.proto.repeatedgroup.add()
+    group_1.a =  7
+    self.assertEqual(2 + 2 + 2 + 2 + 1 + 2, self.Size())
+
+  def testExtensions(self):
+    proto = unittest_pb2.TestAllExtensions()
+    self.assertEqual(0, proto.ByteSize())
+    extension = unittest_pb2.optional_int32_extension  # Field #1, 1 byte.
+    proto.Extensions[extension] = 23
+    # 1 byte for tag, 1 byte for value.
+    self.assertEqual(2, proto.ByteSize())
+    field = unittest_pb2.TestAllTypes.DESCRIPTOR.fields_by_name[
+        'optional_int32']
+    with self.assertRaises(KeyError):
+      proto.Extensions[field] = 23
+
+  def testCacheInvalidationForNonrepeatedScalar(self):
+    # Test non-extension.
+    self.proto.optional_int32 = 1
+    self.assertEqual(2, self.proto.ByteSize())
+    self.proto.optional_int32 = 128
+    self.assertEqual(3, self.proto.ByteSize())
+    self.proto.ClearField('optional_int32')
+    self.assertEqual(0, self.proto.ByteSize())
+
+    # Test within extension.
+    extension = more_extensions_pb2.optional_int_extension
+    self.extended_proto.Extensions[extension] = 1
+    self.assertEqual(2, self.extended_proto.ByteSize())
+    self.extended_proto.Extensions[extension] = 128
+    self.assertEqual(3, self.extended_proto.ByteSize())
+    self.extended_proto.ClearExtension(extension)
+    self.assertEqual(0, self.extended_proto.ByteSize())
+
+  def testCacheInvalidationForRepeatedScalar(self):
+    # Test non-extension.
+    self.proto.repeated_int32.append(1)
+    self.assertEqual(3, self.proto.ByteSize())
+    self.proto.repeated_int32.append(1)
+    self.assertEqual(6, self.proto.ByteSize())
+    self.proto.repeated_int32[1] = 128
+    self.assertEqual(7, self.proto.ByteSize())
+    self.proto.ClearField('repeated_int32')
+    self.assertEqual(0, self.proto.ByteSize())
+
+    # Test within extension.
+    extension = more_extensions_pb2.repeated_int_extension
+    repeated = self.extended_proto.Extensions[extension]
+    repeated.append(1)
+    self.assertEqual(2, self.extended_proto.ByteSize())
+    repeated.append(1)
+    self.assertEqual(4, self.extended_proto.ByteSize())
+    repeated[1] = 128
+    self.assertEqual(5, self.extended_proto.ByteSize())
+    self.extended_proto.ClearExtension(extension)
+    self.assertEqual(0, self.extended_proto.ByteSize())
+
+  def testCacheInvalidationForNonrepeatedMessage(self):
+    # Test non-extension.
+    self.proto.optional_foreign_message.c = 1
+    self.assertEqual(5, self.proto.ByteSize())
+    self.proto.optional_foreign_message.c = 128
+    self.assertEqual(6, self.proto.ByteSize())
+    self.proto.optional_foreign_message.ClearField('c')
+    self.assertEqual(3, self.proto.ByteSize())
+    self.proto.ClearField('optional_foreign_message')
+    self.assertEqual(0, self.proto.ByteSize())
+
+    if api_implementation.Type() == 'python':
+      # This is only possible in pure-Python implementation of the API.
+      child = self.proto.optional_foreign_message
+      self.proto.ClearField('optional_foreign_message')
+      child.c = 128
+      self.assertEqual(0, self.proto.ByteSize())
+
+    # Test within extension.
+    extension = more_extensions_pb2.optional_message_extension
+    child = self.extended_proto.Extensions[extension]
+    self.assertEqual(0, self.extended_proto.ByteSize())
+    child.foreign_message_int = 1
+    self.assertEqual(4, self.extended_proto.ByteSize())
+    child.foreign_message_int = 128
+    self.assertEqual(5, self.extended_proto.ByteSize())
+    self.extended_proto.ClearExtension(extension)
+    self.assertEqual(0, self.extended_proto.ByteSize())
+
+  def testCacheInvalidationForRepeatedMessage(self):
+    # Test non-extension.
+    child0 = self.proto.repeated_foreign_message.add()
+    self.assertEqual(3, self.proto.ByteSize())
+    self.proto.repeated_foreign_message.add()
+    self.assertEqual(6, self.proto.ByteSize())
+    child0.c = 1
+    self.assertEqual(8, self.proto.ByteSize())
+    self.proto.ClearField('repeated_foreign_message')
+    self.assertEqual(0, self.proto.ByteSize())
+
+    # Test within extension.
+    extension = more_extensions_pb2.repeated_message_extension
+    child_list = self.extended_proto.Extensions[extension]
+    child0 = child_list.add()
+    self.assertEqual(2, self.extended_proto.ByteSize())
+    child_list.add()
+    self.assertEqual(4, self.extended_proto.ByteSize())
+    child0.foreign_message_int = 1
+    self.assertEqual(6, self.extended_proto.ByteSize())
+    child0.ClearField('foreign_message_int')
+    self.assertEqual(4, self.extended_proto.ByteSize())
+    self.extended_proto.ClearExtension(extension)
+    self.assertEqual(0, self.extended_proto.ByteSize())
+
+  def testPackedRepeatedScalars(self):
+    self.assertEqual(0, self.packed_proto.ByteSize())
+
+    self.packed_proto.packed_int32.append(10)   # 1 byte.
+    self.packed_proto.packed_int32.append(128)  # 2 bytes.
+    # The tag is 2 bytes (the field number is 90), and the varint
+    # storing the length is 1 byte.
+    int_size = 1 + 2 + 3
+    self.assertEqual(int_size, self.packed_proto.ByteSize())
+
+    self.packed_proto.packed_double.append(4.2)   # 8 bytes
+    self.packed_proto.packed_double.append(3.25)  # 8 bytes
+    # 2 more tag bytes, 1 more length byte.
+    double_size = 8 + 8 + 3
+    self.assertEqual(int_size+double_size, self.packed_proto.ByteSize())
+
+    self.packed_proto.ClearField('packed_int32')
+    self.assertEqual(double_size, self.packed_proto.ByteSize())
+
+  def testPackedExtensions(self):
+    self.assertEqual(0, self.packed_extended_proto.ByteSize())
+    extension = self.packed_extended_proto.Extensions[
+        unittest_pb2.packed_fixed32_extension]
+    extension.extend([1, 2, 3, 4])   # 16 bytes
+    # Tag is 3 bytes.
+    self.assertEqual(19, self.packed_extended_proto.ByteSize())
+
+
+# Issues to be sure to cover include:
+#   * Handling of unrecognized tags ("uninterpreted_bytes").
+#   * Handling of MessageSets.
+#   * Consistent ordering of tags in the wire format,
+#     including ordering between extensions and non-extension
+#     fields.
+#   * Consistent serialization of negative numbers, especially
+#     negative int32s.
+#   * Handling of empty submessages (with and without "has"
+#     bits set).
+
+@testing_refleaks.TestCase
+class SerializationTest(unittest.TestCase):
+
+  def testSerializeEmtpyMessage(self):
+    first_proto = unittest_pb2.TestAllTypes()
+    second_proto = unittest_pb2.TestAllTypes()
+    serialized = first_proto.SerializeToString()
+    self.assertEqual(first_proto.ByteSize(), len(serialized))
+    self.assertEqual(
+        len(serialized),
+        second_proto.MergeFromString(serialized))
+    self.assertEqual(first_proto, second_proto)
+
+  def testSerializeAllFields(self):
+    first_proto = unittest_pb2.TestAllTypes()
+    second_proto = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(first_proto)
+    serialized = first_proto.SerializeToString()
+    self.assertEqual(first_proto.ByteSize(), len(serialized))
+    self.assertEqual(
+        len(serialized),
+        second_proto.MergeFromString(serialized))
+    self.assertEqual(first_proto, second_proto)
+
+  def testSerializeAllExtensions(self):
+    first_proto = unittest_pb2.TestAllExtensions()
+    second_proto = unittest_pb2.TestAllExtensions()
+    test_util.SetAllExtensions(first_proto)
+    serialized = first_proto.SerializeToString()
+    self.assertEqual(
+        len(serialized),
+        second_proto.MergeFromString(serialized))
+    self.assertEqual(first_proto, second_proto)
+
+  def testSerializeWithOptionalGroup(self):
+    first_proto = unittest_pb2.TestAllTypes()
+    second_proto = unittest_pb2.TestAllTypes()
+    first_proto.optionalgroup.a = 242
+    serialized = first_proto.SerializeToString()
+    self.assertEqual(
+        len(serialized),
+        second_proto.MergeFromString(serialized))
+    self.assertEqual(first_proto, second_proto)
+
+  def testSerializeNegativeValues(self):
+    first_proto = unittest_pb2.TestAllTypes()
+
+    first_proto.optional_int32 = -1
+    first_proto.optional_int64 = -(2 << 40)
+    first_proto.optional_sint32 = -3
+    first_proto.optional_sint64 = -(4 << 40)
+    first_proto.optional_sfixed32 = -5
+    first_proto.optional_sfixed64 = -(6 << 40)
+
+    second_proto = unittest_pb2.TestAllTypes.FromString(
+        first_proto.SerializeToString())
+
+    self.assertEqual(first_proto, second_proto)
+
+  def testParseTruncated(self):
+    # This test is only applicable for the Python implementation of the API.
+    if api_implementation.Type() != 'python':
+      return
+
+    first_proto = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(first_proto)
+    serialized = memoryview(first_proto.SerializeToString())
+
+    for truncation_point in range(len(serialized) + 1):
+      try:
+        second_proto = unittest_pb2.TestAllTypes()
+        unknown_fields = unittest_pb2.TestEmptyMessage()
+        pos = second_proto._InternalParse(serialized, 0, truncation_point)
+        # If we didn't raise an error then we read exactly the amount expected.
+        self.assertEqual(truncation_point, pos)
+
+        # Parsing to unknown fields should not throw if parsing to known fields
+        # did not.
+        try:
+          pos2 = unknown_fields._InternalParse(serialized, 0, truncation_point)
+          self.assertEqual(truncation_point, pos2)
+        except message.DecodeError:
+          self.fail('Parsing unknown fields failed when parsing known fields '
+                    'did not.')
+      except message.DecodeError:
+        # Parsing unknown fields should also fail.
+        self.assertRaises(message.DecodeError, unknown_fields._InternalParse,
+                          serialized, 0, truncation_point)
+
+  def testCanonicalSerializationOrder(self):
+    proto = more_messages_pb2.OutOfOrderFields()
+    # These are also their tag numbers.  Even though we're setting these in
+    # reverse-tag order AND they're listed in reverse tag-order in the .proto
+    # file, they should nonetheless be serialized in tag order.
+    proto.optional_sint32 = 5
+    proto.Extensions[more_messages_pb2.optional_uint64] = 4
+    proto.optional_uint32 = 3
+    proto.Extensions[more_messages_pb2.optional_int64] = 2
+    proto.optional_int32 = 1
+    serialized = proto.SerializeToString()
+    self.assertEqual(proto.ByteSize(), len(serialized))
+    d = _MiniDecoder(serialized)
+    ReadTag = d.ReadFieldNumberAndWireType
+    self.assertEqual((1, wire_format.WIRETYPE_VARINT), ReadTag())
+    self.assertEqual(1, d.ReadInt32())
+    self.assertEqual((2, wire_format.WIRETYPE_VARINT), ReadTag())
+    self.assertEqual(2, d.ReadInt64())
+    self.assertEqual((3, wire_format.WIRETYPE_VARINT), ReadTag())
+    self.assertEqual(3, d.ReadUInt32())
+    self.assertEqual((4, wire_format.WIRETYPE_VARINT), ReadTag())
+    self.assertEqual(4, d.ReadUInt64())
+    self.assertEqual((5, wire_format.WIRETYPE_VARINT), ReadTag())
+    self.assertEqual(5, d.ReadSInt32())
+
+  def testCanonicalSerializationOrderSameAsCpp(self):
+    # Copy of the same test we use for C++.
+    proto = unittest_pb2.TestFieldOrderings()
+    test_util.SetAllFieldsAndExtensions(proto)
+    serialized = proto.SerializeToString()
+    test_util.ExpectAllFieldsAndExtensionsInOrder(serialized)
+
+  def testMergeFromStringWhenFieldsAlreadySet(self):
+    first_proto = unittest_pb2.TestAllTypes()
+    first_proto.repeated_string.append('foobar')
+    first_proto.optional_int32 = 23
+    first_proto.optional_nested_message.bb = 42
+    serialized = first_proto.SerializeToString()
+
+    second_proto = unittest_pb2.TestAllTypes()
+    second_proto.repeated_string.append('baz')
+    second_proto.optional_int32 = 100
+    second_proto.optional_nested_message.bb = 999
+
+    bytes_parsed = second_proto.MergeFromString(serialized)
+    self.assertEqual(len(serialized), bytes_parsed)
+
+    # Ensure that we append to repeated fields.
+    self.assertEqual(['baz', 'foobar'], list(second_proto.repeated_string))
+    # Ensure that we overwrite nonrepeatd scalars.
+    self.assertEqual(23, second_proto.optional_int32)
+    # Ensure that we recursively call MergeFromString() on
+    # submessages.
+    self.assertEqual(42, second_proto.optional_nested_message.bb)
+
+  def testMessageSetWireFormat(self):
+    proto = message_set_extensions_pb2.TestMessageSet()
+    extension_message1 = message_set_extensions_pb2.TestMessageSetExtension1
+    extension_message2 = message_set_extensions_pb2.TestMessageSetExtension2
+    extension1 = extension_message1.message_set_extension
+    extension2 = extension_message2.message_set_extension
+    extension3 = message_set_extensions_pb2.message_set_extension3
+    proto.Extensions[extension1].i = 123
+    proto.Extensions[extension2].str = 'foo'
+    proto.Extensions[extension3].text = 'bar'
+
+    # Serialize using the MessageSet wire format (this is specified in the
+    # .proto file).
+    serialized = proto.SerializeToString()
+
+    raw = unittest_mset_pb2.RawMessageSet()
+    self.assertEqual(False,
+                     raw.DESCRIPTOR.GetOptions().message_set_wire_format)
+    self.assertEqual(
+        len(serialized),
+        raw.MergeFromString(serialized))
+    self.assertEqual(3, len(raw.item))
+
+    message1 = message_set_extensions_pb2.TestMessageSetExtension1()
+    self.assertEqual(
+        len(raw.item[0].message),
+        message1.MergeFromString(raw.item[0].message))
+    self.assertEqual(123, message1.i)
+
+    message2 = message_set_extensions_pb2.TestMessageSetExtension2()
+    self.assertEqual(
+        len(raw.item[1].message),
+        message2.MergeFromString(raw.item[1].message))
+    self.assertEqual('foo', message2.str)
+
+    message3 = message_set_extensions_pb2.TestMessageSetExtension3()
+    self.assertEqual(
+        len(raw.item[2].message),
+        message3.MergeFromString(raw.item[2].message))
+    self.assertEqual('bar', message3.text)
+
+    # Deserialize using the MessageSet wire format.
+    proto2 = message_set_extensions_pb2.TestMessageSet()
+    self.assertEqual(
+        len(serialized),
+        proto2.MergeFromString(serialized))
+    self.assertEqual(123, proto2.Extensions[extension1].i)
+    self.assertEqual('foo', proto2.Extensions[extension2].str)
+    self.assertEqual('bar', proto2.Extensions[extension3].text)
+
+    # Check byte size.
+    self.assertEqual(proto2.ByteSize(), len(serialized))
+    self.assertEqual(proto.ByteSize(), len(serialized))
+
+  def testMessageSetWireFormatUnknownExtension(self):
+    # Create a message using the message set wire format with an unknown
+    # message.
+    raw = unittest_mset_pb2.RawMessageSet()
+
+    # Add an item.
+    item = raw.item.add()
+    item.type_id = 98418603
+    extension_message1 = message_set_extensions_pb2.TestMessageSetExtension1
+    message1 = message_set_extensions_pb2.TestMessageSetExtension1()
+    message1.i = 12345
+    item.message = message1.SerializeToString()
+
+    # Add a second, unknown extension.
+    item = raw.item.add()
+    item.type_id = 98418604
+    extension_message1 = message_set_extensions_pb2.TestMessageSetExtension1
+    message1 = message_set_extensions_pb2.TestMessageSetExtension1()
+    message1.i = 12346
+    item.message = message1.SerializeToString()
+
+    # Add another unknown extension.
+    item = raw.item.add()
+    item.type_id = 98418605
+    message1 = message_set_extensions_pb2.TestMessageSetExtension2()
+    message1.str = 'foo'
+    item.message = message1.SerializeToString()
+
+    serialized = raw.SerializeToString()
+
+    # Parse message using the message set wire format.
+    proto = message_set_extensions_pb2.TestMessageSet()
+    self.assertEqual(
+        len(serialized),
+        proto.MergeFromString(serialized))
+
+    # Check that the message parsed well.
+    extension_message1 = message_set_extensions_pb2.TestMessageSetExtension1
+    extension1 = extension_message1.message_set_extension
+    self.assertEqual(12345, proto.Extensions[extension1].i)
+
+  def testUnknownFields(self):
+    proto = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(proto)
+
+    serialized = proto.SerializeToString()
+
+    # The empty message should be parsable with all of the fields
+    # unknown.
+    proto2 = unittest_pb2.TestEmptyMessage()
+
+    # Parsing this message should succeed.
+    self.assertEqual(
+        len(serialized),
+        proto2.MergeFromString(serialized))
+
+    # Now test with a int64 field set.
+    proto = unittest_pb2.TestAllTypes()
+    proto.optional_int64 = 0x0fffffffffffffff
+    serialized = proto.SerializeToString()
+    # The empty message should be parsable with all of the fields
+    # unknown.
+    proto2 = unittest_pb2.TestEmptyMessage()
+    # Parsing this message should succeed.
+    self.assertEqual(
+        len(serialized),
+        proto2.MergeFromString(serialized))
+
+  def _CheckRaises(self, exc_class, callable_obj, exception):
+    """This method checks if the excpetion type and message are as expected."""
+    try:
+      callable_obj()
+    except exc_class as ex:
+      # Check if the exception message is the right one.
+      self.assertEqual(exception, str(ex))
+      return
+    else:
+      raise self.failureException('%s not raised' % str(exc_class))
+
+  def testSerializeUninitialized(self):
+    proto = unittest_pb2.TestRequired()
+    self._CheckRaises(
+        message.EncodeError,
+        proto.SerializeToString,
+        'Message protobuf_unittest.TestRequired is missing required fields: '
+        'a,b,c')
+    # Shouldn't raise exceptions.
+    partial = proto.SerializePartialToString()
+
+    proto2 = unittest_pb2.TestRequired()
+    self.assertFalse(proto2.HasField('a'))
+    # proto2 ParseFromString does not check that required fields are set.
+    proto2.ParseFromString(partial)
+    self.assertFalse(proto2.HasField('a'))
+
+    proto.a = 1
+    self._CheckRaises(
+        message.EncodeError,
+        proto.SerializeToString,
+        'Message protobuf_unittest.TestRequired is missing required fields: b,c')
+    # Shouldn't raise exceptions.
+    partial = proto.SerializePartialToString()
+
+    proto.b = 2
+    self._CheckRaises(
+        message.EncodeError,
+        proto.SerializeToString,
+        'Message protobuf_unittest.TestRequired is missing required fields: c')
+    # Shouldn't raise exceptions.
+    partial = proto.SerializePartialToString()
+
+    proto.c = 3
+    serialized = proto.SerializeToString()
+    # Shouldn't raise exceptions.
+    partial = proto.SerializePartialToString()
+
+    proto2 = unittest_pb2.TestRequired()
+    self.assertEqual(
+        len(serialized),
+        proto2.MergeFromString(serialized))
+    self.assertEqual(1, proto2.a)
+    self.assertEqual(2, proto2.b)
+    self.assertEqual(3, proto2.c)
+    self.assertEqual(
+        len(partial),
+        proto2.MergeFromString(partial))
+    self.assertEqual(1, proto2.a)
+    self.assertEqual(2, proto2.b)
+    self.assertEqual(3, proto2.c)
+
+  def testSerializeUninitializedSubMessage(self):
+    proto = unittest_pb2.TestRequiredForeign()
+
+    # Sub-message doesn't exist yet, so this succeeds.
+    proto.SerializeToString()
+
+    proto.optional_message.a = 1
+    self._CheckRaises(
+        message.EncodeError,
+        proto.SerializeToString,
+        'Message protobuf_unittest.TestRequiredForeign '
+        'is missing required fields: '
+        'optional_message.b,optional_message.c')
+
+    proto.optional_message.b = 2
+    proto.optional_message.c = 3
+    proto.SerializeToString()
+
+    proto.repeated_message.add().a = 1
+    proto.repeated_message.add().b = 2
+    self._CheckRaises(
+        message.EncodeError,
+        proto.SerializeToString,
+        'Message protobuf_unittest.TestRequiredForeign is missing required fields: '
+        'repeated_message[0].b,repeated_message[0].c,'
+        'repeated_message[1].a,repeated_message[1].c')
+
+    proto.repeated_message[0].b = 2
+    proto.repeated_message[0].c = 3
+    proto.repeated_message[1].a = 1
+    proto.repeated_message[1].c = 3
+    proto.SerializeToString()
+
+  def testSerializeAllPackedFields(self):
+    first_proto = unittest_pb2.TestPackedTypes()
+    second_proto = unittest_pb2.TestPackedTypes()
+    test_util.SetAllPackedFields(first_proto)
+    serialized = first_proto.SerializeToString()
+    self.assertEqual(first_proto.ByteSize(), len(serialized))
+    bytes_read = second_proto.MergeFromString(serialized)
+    self.assertEqual(second_proto.ByteSize(), bytes_read)
+    self.assertEqual(first_proto, second_proto)
+
+  def testSerializeAllPackedExtensions(self):
+    first_proto = unittest_pb2.TestPackedExtensions()
+    second_proto = unittest_pb2.TestPackedExtensions()
+    test_util.SetAllPackedExtensions(first_proto)
+    serialized = first_proto.SerializeToString()
+    bytes_read = second_proto.MergeFromString(serialized)
+    self.assertEqual(second_proto.ByteSize(), bytes_read)
+    self.assertEqual(first_proto, second_proto)
+
+  def testMergePackedFromStringWhenSomeFieldsAlreadySet(self):
+    first_proto = unittest_pb2.TestPackedTypes()
+    first_proto.packed_int32.extend([1, 2])
+    first_proto.packed_double.append(3.0)
+    serialized = first_proto.SerializeToString()
+
+    second_proto = unittest_pb2.TestPackedTypes()
+    second_proto.packed_int32.append(3)
+    second_proto.packed_double.extend([1.0, 2.0])
+    second_proto.packed_sint32.append(4)
+
+    self.assertEqual(
+        len(serialized),
+        second_proto.MergeFromString(serialized))
+    self.assertEqual([3, 1, 2], second_proto.packed_int32)
+    self.assertEqual([1.0, 2.0, 3.0], second_proto.packed_double)
+    self.assertEqual([4], second_proto.packed_sint32)
+
+  def testPackedFieldsWireFormat(self):
+    proto = unittest_pb2.TestPackedTypes()
+    proto.packed_int32.extend([1, 2, 150, 3])  # 1 + 1 + 2 + 1 bytes
+    proto.packed_double.extend([1.0, 1000.0])  # 8 + 8 bytes
+    proto.packed_float.append(2.0)             # 4 bytes, will be before double
+    serialized = proto.SerializeToString()
+    self.assertEqual(proto.ByteSize(), len(serialized))
+    d = _MiniDecoder(serialized)
+    ReadTag = d.ReadFieldNumberAndWireType
+    self.assertEqual((90, wire_format.WIRETYPE_LENGTH_DELIMITED), ReadTag())
+    self.assertEqual(1+1+1+2, d.ReadInt32())
+    self.assertEqual(1, d.ReadInt32())
+    self.assertEqual(2, d.ReadInt32())
+    self.assertEqual(150, d.ReadInt32())
+    self.assertEqual(3, d.ReadInt32())
+    self.assertEqual((100, wire_format.WIRETYPE_LENGTH_DELIMITED), ReadTag())
+    self.assertEqual(4, d.ReadInt32())
+    self.assertEqual(2.0, d.ReadFloat())
+    self.assertEqual((101, wire_format.WIRETYPE_LENGTH_DELIMITED), ReadTag())
+    self.assertEqual(8+8, d.ReadInt32())
+    self.assertEqual(1.0, d.ReadDouble())
+    self.assertEqual(1000.0, d.ReadDouble())
+    self.assertTrue(d.EndOfStream())
+
+  def testParsePackedFromUnpacked(self):
+    unpacked = unittest_pb2.TestUnpackedTypes()
+    test_util.SetAllUnpackedFields(unpacked)
+    packed = unittest_pb2.TestPackedTypes()
+    serialized = unpacked.SerializeToString()
+    self.assertEqual(
+        len(serialized),
+        packed.MergeFromString(serialized))
+    expected = unittest_pb2.TestPackedTypes()
+    test_util.SetAllPackedFields(expected)
+    self.assertEqual(expected, packed)
+
+  def testParseUnpackedFromPacked(self):
+    packed = unittest_pb2.TestPackedTypes()
+    test_util.SetAllPackedFields(packed)
+    unpacked = unittest_pb2.TestUnpackedTypes()
+    serialized = packed.SerializeToString()
+    self.assertEqual(
+        len(serialized),
+        unpacked.MergeFromString(serialized))
+    expected = unittest_pb2.TestUnpackedTypes()
+    test_util.SetAllUnpackedFields(expected)
+    self.assertEqual(expected, unpacked)
+
+  def testFieldNumbers(self):
+    proto = unittest_pb2.TestAllTypes()
+    self.assertEqual(unittest_pb2.TestAllTypes.NestedMessage.BB_FIELD_NUMBER, 1)
+    self.assertEqual(unittest_pb2.TestAllTypes.OPTIONAL_INT32_FIELD_NUMBER, 1)
+    self.assertEqual(unittest_pb2.TestAllTypes.OPTIONALGROUP_FIELD_NUMBER, 16)
+    self.assertEqual(
+      unittest_pb2.TestAllTypes.OPTIONAL_NESTED_MESSAGE_FIELD_NUMBER, 18)
+    self.assertEqual(
+      unittest_pb2.TestAllTypes.OPTIONAL_NESTED_ENUM_FIELD_NUMBER, 21)
+    self.assertEqual(unittest_pb2.TestAllTypes.REPEATED_INT32_FIELD_NUMBER, 31)
+    self.assertEqual(unittest_pb2.TestAllTypes.REPEATEDGROUP_FIELD_NUMBER, 46)
+    self.assertEqual(
+      unittest_pb2.TestAllTypes.REPEATED_NESTED_MESSAGE_FIELD_NUMBER, 48)
+    self.assertEqual(
+      unittest_pb2.TestAllTypes.REPEATED_NESTED_ENUM_FIELD_NUMBER, 51)
+
+  def testExtensionFieldNumbers(self):
+    self.assertEqual(unittest_pb2.TestRequired.single.number, 1000)
+    self.assertEqual(unittest_pb2.TestRequired.SINGLE_FIELD_NUMBER, 1000)
+    self.assertEqual(unittest_pb2.TestRequired.multi.number, 1001)
+    self.assertEqual(unittest_pb2.TestRequired.MULTI_FIELD_NUMBER, 1001)
+    self.assertEqual(unittest_pb2.optional_int32_extension.number, 1)
+    self.assertEqual(unittest_pb2.OPTIONAL_INT32_EXTENSION_FIELD_NUMBER, 1)
+    self.assertEqual(unittest_pb2.optionalgroup_extension.number, 16)
+    self.assertEqual(unittest_pb2.OPTIONALGROUP_EXTENSION_FIELD_NUMBER, 16)
+    self.assertEqual(unittest_pb2.optional_nested_message_extension.number, 18)
+    self.assertEqual(
+      unittest_pb2.OPTIONAL_NESTED_MESSAGE_EXTENSION_FIELD_NUMBER, 18)
+    self.assertEqual(unittest_pb2.optional_nested_enum_extension.number, 21)
+    self.assertEqual(unittest_pb2.OPTIONAL_NESTED_ENUM_EXTENSION_FIELD_NUMBER,
+      21)
+    self.assertEqual(unittest_pb2.repeated_int32_extension.number, 31)
+    self.assertEqual(unittest_pb2.REPEATED_INT32_EXTENSION_FIELD_NUMBER, 31)
+    self.assertEqual(unittest_pb2.repeatedgroup_extension.number, 46)
+    self.assertEqual(unittest_pb2.REPEATEDGROUP_EXTENSION_FIELD_NUMBER, 46)
+    self.assertEqual(unittest_pb2.repeated_nested_message_extension.number, 48)
+    self.assertEqual(
+      unittest_pb2.REPEATED_NESTED_MESSAGE_EXTENSION_FIELD_NUMBER, 48)
+    self.assertEqual(unittest_pb2.repeated_nested_enum_extension.number, 51)
+    self.assertEqual(unittest_pb2.REPEATED_NESTED_ENUM_EXTENSION_FIELD_NUMBER,
+      51)
+
+  def testFieldProperties(self):
+    cls = unittest_pb2.TestAllTypes
+    self.assertIs(cls.optional_int32.DESCRIPTOR,
+                  cls.DESCRIPTOR.fields_by_name['optional_int32'])
+    self.assertEqual(cls.OPTIONAL_INT32_FIELD_NUMBER,
+                     cls.optional_int32.DESCRIPTOR.number)
+    self.assertIs(cls.optional_nested_message.DESCRIPTOR,
+                  cls.DESCRIPTOR.fields_by_name['optional_nested_message'])
+    self.assertEqual(cls.OPTIONAL_NESTED_MESSAGE_FIELD_NUMBER,
+                     cls.optional_nested_message.DESCRIPTOR.number)
+    self.assertIs(cls.repeated_int32.DESCRIPTOR,
+                  cls.DESCRIPTOR.fields_by_name['repeated_int32'])
+    self.assertEqual(cls.REPEATED_INT32_FIELD_NUMBER,
+                     cls.repeated_int32.DESCRIPTOR.number)
+
+  def testFieldDataDescriptor(self):
+    msg = unittest_pb2.TestAllTypes()
+    msg.optional_int32 = 42
+    self.assertEqual(unittest_pb2.TestAllTypes.optional_int32.__get__(msg), 42)
+    unittest_pb2.TestAllTypes.optional_int32.__set__(msg, 25)
+    self.assertEqual(msg.optional_int32, 25)
+    with self.assertRaises(AttributeError):
+      del msg.optional_int32
+    try:
+      unittest_pb2.ForeignMessage.c.__get__(msg)
+    except TypeError:
+      pass  # The cpp implementation cannot mix fields from other messages.
+            # This test exercises a specific check that avoids a crash.
+    else:
+      pass  # The python implementation allows fields from other messages.
+            # This is useless, but works.
+
+  def testInitKwargs(self):
+    proto = unittest_pb2.TestAllTypes(
+        optional_int32=1,
+        optional_string='foo',
+        optional_bool=True,
+        optional_bytes=b'bar',
+        optional_nested_message=unittest_pb2.TestAllTypes.NestedMessage(bb=1),
+        optional_foreign_message=unittest_pb2.ForeignMessage(c=1),
+        optional_nested_enum=unittest_pb2.TestAllTypes.FOO,
+        optional_foreign_enum=unittest_pb2.FOREIGN_FOO,
+        repeated_int32=[1, 2, 3])
+    self.assertTrue(proto.IsInitialized())
+    self.assertTrue(proto.HasField('optional_int32'))
+    self.assertTrue(proto.HasField('optional_string'))
+    self.assertTrue(proto.HasField('optional_bool'))
+    self.assertTrue(proto.HasField('optional_bytes'))
+    self.assertTrue(proto.HasField('optional_nested_message'))
+    self.assertTrue(proto.HasField('optional_foreign_message'))
+    self.assertTrue(proto.HasField('optional_nested_enum'))
+    self.assertTrue(proto.HasField('optional_foreign_enum'))
+    self.assertEqual(1, proto.optional_int32)
+    self.assertEqual('foo', proto.optional_string)
+    self.assertEqual(True, proto.optional_bool)
+    self.assertEqual(b'bar', proto.optional_bytes)
+    self.assertEqual(1, proto.optional_nested_message.bb)
+    self.assertEqual(1, proto.optional_foreign_message.c)
+    self.assertEqual(unittest_pb2.TestAllTypes.FOO,
+                     proto.optional_nested_enum)
+    self.assertEqual(unittest_pb2.FOREIGN_FOO, proto.optional_foreign_enum)
+    self.assertEqual([1, 2, 3], proto.repeated_int32)
+
+  def testInitArgsUnknownFieldName(self):
+    def InitalizeEmptyMessageWithExtraKeywordArg():
+      unused_proto = unittest_pb2.TestEmptyMessage(unknown='unknown')
+    self._CheckRaises(
+        ValueError,
+        InitalizeEmptyMessageWithExtraKeywordArg,
+        'Protocol message TestEmptyMessage has no "unknown" field.')
+
+  def testInitRequiredKwargs(self):
+    proto = unittest_pb2.TestRequired(a=1, b=1, c=1)
+    self.assertTrue(proto.IsInitialized())
+    self.assertTrue(proto.HasField('a'))
+    self.assertTrue(proto.HasField('b'))
+    self.assertTrue(proto.HasField('c'))
+    self.assertFalse(proto.HasField('dummy2'))
+    self.assertEqual(1, proto.a)
+    self.assertEqual(1, proto.b)
+    self.assertEqual(1, proto.c)
+
+  def testInitRequiredForeignKwargs(self):
+    proto = unittest_pb2.TestRequiredForeign(
+        optional_message=unittest_pb2.TestRequired(a=1, b=1, c=1))
+    self.assertTrue(proto.IsInitialized())
+    self.assertTrue(proto.HasField('optional_message'))
+    self.assertTrue(proto.optional_message.IsInitialized())
+    self.assertTrue(proto.optional_message.HasField('a'))
+    self.assertTrue(proto.optional_message.HasField('b'))
+    self.assertTrue(proto.optional_message.HasField('c'))
+    self.assertFalse(proto.optional_message.HasField('dummy2'))
+    self.assertEqual(unittest_pb2.TestRequired(a=1, b=1, c=1),
+                     proto.optional_message)
+    self.assertEqual(1, proto.optional_message.a)
+    self.assertEqual(1, proto.optional_message.b)
+    self.assertEqual(1, proto.optional_message.c)
+
+  def testInitRepeatedKwargs(self):
+    proto = unittest_pb2.TestAllTypes(repeated_int32=[1, 2, 3])
+    self.assertTrue(proto.IsInitialized())
+    self.assertEqual(1, proto.repeated_int32[0])
+    self.assertEqual(2, proto.repeated_int32[1])
+    self.assertEqual(3, proto.repeated_int32[2])
+
+
+@testing_refleaks.TestCase
+class OptionsTest(unittest.TestCase):
+
+  def testMessageOptions(self):
+    proto = message_set_extensions_pb2.TestMessageSet()
+    self.assertEqual(True,
+                     proto.DESCRIPTOR.GetOptions().message_set_wire_format)
+    proto = unittest_pb2.TestAllTypes()
+    self.assertEqual(False,
+                     proto.DESCRIPTOR.GetOptions().message_set_wire_format)
+
+  def testPackedOptions(self):
+    proto = unittest_pb2.TestAllTypes()
+    proto.optional_int32 = 1
+    proto.optional_double = 3.0
+    for field_descriptor, _ in proto.ListFields():
+      self.assertEqual(False, field_descriptor.GetOptions().packed)
+
+    proto = unittest_pb2.TestPackedTypes()
+    proto.packed_int32.append(1)
+    proto.packed_double.append(3.0)
+    for field_descriptor, _ in proto.ListFields():
+      self.assertEqual(True, field_descriptor.GetOptions().packed)
+      self.assertEqual(descriptor.FieldDescriptor.LABEL_REPEATED,
+                       field_descriptor.label)
+
+
+
+@testing_refleaks.TestCase
+class ClassAPITest(unittest.TestCase):
+
+  @unittest.skipIf(
+      api_implementation.Type() == 'cpp' and api_implementation.Version() == 2,
+      'C++ implementation requires a call to MakeDescriptor()')
+  @testing_refleaks.SkipReferenceLeakChecker('MakeClass is not repeatable')
+  def testMakeClassWithNestedDescriptor(self):
+    leaf_desc = descriptor.Descriptor(
+        'leaf', 'package.parent.child.leaf', '',
+        containing_type=None, fields=[],
+        nested_types=[], enum_types=[],
+        extensions=[],
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+    child_desc = descriptor.Descriptor(
+        'child', 'package.parent.child', '',
+        containing_type=None, fields=[],
+        nested_types=[leaf_desc], enum_types=[],
+        extensions=[],
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+    sibling_desc = descriptor.Descriptor(
+        'sibling', 'package.parent.sibling',
+        '', containing_type=None, fields=[],
+        nested_types=[], enum_types=[],
+        extensions=[],
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+    parent_desc = descriptor.Descriptor(
+        'parent', 'package.parent', '',
+        containing_type=None, fields=[],
+        nested_types=[child_desc, sibling_desc],
+        enum_types=[], extensions=[],
+        # pylint: disable=protected-access
+        create_key=descriptor._internal_create_key)
+    reflection.MakeClass(parent_desc)
+
+  def _GetSerializedFileDescriptor(self, name):
+    """Get a serialized representation of a test FileDescriptorProto.
+
+    Args:
+      name: All calls to this must use a unique message name, to avoid
+          collisions in the cpp descriptor pool.
+    Returns:
+      A string containing the serialized form of a test FileDescriptorProto.
+    """
+    file_descriptor_str = (
+        'message_type {'
+        '  name: "' + name + '"'
+        '  field {'
+        '    name: "flat"'
+        '    number: 1'
+        '    label: LABEL_REPEATED'
+        '    type: TYPE_UINT32'
+        '  }'
+        '  field {'
+        '    name: "bar"'
+        '    number: 2'
+        '    label: LABEL_OPTIONAL'
+        '    type: TYPE_MESSAGE'
+        '    type_name: "Bar"'
+        '  }'
+        '  nested_type {'
+        '    name: "Bar"'
+        '    field {'
+        '      name: "baz"'
+        '      number: 3'
+        '      label: LABEL_OPTIONAL'
+        '      type: TYPE_MESSAGE'
+        '      type_name: "Baz"'
+        '    }'
+        '    nested_type {'
+        '      name: "Baz"'
+        '      enum_type {'
+        '        name: "deep_enum"'
+        '        value {'
+        '          name: "VALUE_A"'
+        '          number: 0'
+        '        }'
+        '      }'
+        '      field {'
+        '        name: "deep"'
+        '        number: 4'
+        '        label: LABEL_OPTIONAL'
+        '        type: TYPE_UINT32'
+        '      }'
+        '    }'
+        '  }'
+        '}')
+    file_descriptor = descriptor_pb2.FileDescriptorProto()
+    text_format.Merge(file_descriptor_str, file_descriptor)
+    return file_descriptor.SerializeToString()
+
+  @testing_refleaks.SkipReferenceLeakChecker('MakeDescriptor is not repeatable')
+  # This test can only run once; the second time, it raises errors about
+  # conflicting message descriptors.
+  def testParsingFlatClassWithExplicitClassDeclaration(self):
+    """Test that the generated class can parse a flat message."""
+    # TODO(xiaofeng): This test fails with cpp implemetnation in the call
+    # of six.with_metaclass(). The other two callsites of with_metaclass
+    # in this file are both excluded from cpp test, so it might be expected
+    # to fail. Need someone more familiar with the python code to take a
+    # look at this.
+    if api_implementation.Type() != 'python':
+      return
+    file_descriptor = descriptor_pb2.FileDescriptorProto()
+    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('A'))
+    msg_descriptor = descriptor.MakeDescriptor(
+        file_descriptor.message_type[0])
+
+    class MessageClass(six.with_metaclass(reflection.GeneratedProtocolMessageType, message.Message)):
+      DESCRIPTOR = msg_descriptor
+    msg = MessageClass()
+    msg_str = (
+        'flat: 0 '
+        'flat: 1 '
+        'flat: 2 ')
+    text_format.Merge(msg_str, msg)
+    self.assertEqual(msg.flat, [0, 1, 2])
+
+  @testing_refleaks.SkipReferenceLeakChecker('MakeDescriptor is not repeatable')
+  def testParsingFlatClass(self):
+    """Test that the generated class can parse a flat message."""
+    file_descriptor = descriptor_pb2.FileDescriptorProto()
+    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('B'))
+    msg_descriptor = descriptor.MakeDescriptor(
+        file_descriptor.message_type[0])
+    msg_class = reflection.MakeClass(msg_descriptor)
+    msg = msg_class()
+    msg_str = (
+        'flat: 0 '
+        'flat: 1 '
+        'flat: 2 ')
+    text_format.Merge(msg_str, msg)
+    self.assertEqual(msg.flat, [0, 1, 2])
+
+  @testing_refleaks.SkipReferenceLeakChecker('MakeDescriptor is not repeatable')
+  def testParsingNestedClass(self):
+    """Test that the generated class can parse a nested message."""
+    file_descriptor = descriptor_pb2.FileDescriptorProto()
+    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('C'))
+    msg_descriptor = descriptor.MakeDescriptor(
+        file_descriptor.message_type[0])
+    msg_class = reflection.MakeClass(msg_descriptor)
+    msg = msg_class()
+    msg_str = (
+        'bar {'
+        '  baz {'
+        '    deep: 4'
+        '  }'
+        '}')
+    text_format.Merge(msg_str, msg)
+    self.assertEqual(msg.bar.baz.deep, 4)
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/service_reflection_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/service_reflection_test.py
new file mode 100644
index 0000000..77239f4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/service_reflection_test.py
@@ -0,0 +1,144 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests for google.protobuf.internal.service_reflection."""
+
+__author__ = 'petar@google.com (Petar Petrov)'
+
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import unittest_pb2
+from google.protobuf import service_reflection
+from google.protobuf import service
+
+
+class FooUnitTest(unittest.TestCase):
+
+  def testService(self):
+    class MockRpcChannel(service.RpcChannel):
+      def CallMethod(self, method, controller, request, response, callback):
+        self.method = method
+        self.controller = controller
+        self.request = request
+        callback(response)
+
+    class MockRpcController(service.RpcController):
+      def SetFailed(self, msg):
+        self.failure_message = msg
+
+    self.callback_response = None
+
+    class MyService(unittest_pb2.TestService):
+      pass
+
+    self.callback_response = None
+
+    def MyCallback(response):
+      self.callback_response = response
+
+    rpc_controller = MockRpcController()
+    channel = MockRpcChannel()
+    srvc = MyService()
+    srvc.Foo(rpc_controller, unittest_pb2.FooRequest(), MyCallback)
+    self.assertEqual('Method Foo not implemented.',
+                     rpc_controller.failure_message)
+    self.assertEqual(None, self.callback_response)
+
+    rpc_controller.failure_message = None
+
+    service_descriptor = unittest_pb2.TestService.GetDescriptor()
+    srvc.CallMethod(service_descriptor.methods[1], rpc_controller,
+                    unittest_pb2.BarRequest(), MyCallback)
+    self.assertTrue(srvc.GetRequestClass(service_descriptor.methods[1]) is
+                    unittest_pb2.BarRequest)
+    self.assertTrue(srvc.GetResponseClass(service_descriptor.methods[1]) is
+                    unittest_pb2.BarResponse)
+    self.assertEqual('Method Bar not implemented.',
+                     rpc_controller.failure_message)
+    self.assertEqual(None, self.callback_response)
+
+    class MyServiceImpl(unittest_pb2.TestService):
+      def Foo(self, rpc_controller, request, done):
+        self.foo_called = True
+      def Bar(self, rpc_controller, request, done):
+        self.bar_called = True
+
+    srvc = MyServiceImpl()
+    rpc_controller.failure_message = None
+    srvc.Foo(rpc_controller, unittest_pb2.FooRequest(), MyCallback)
+    self.assertEqual(None, rpc_controller.failure_message)
+    self.assertEqual(True, srvc.foo_called)
+
+    rpc_controller.failure_message = None
+    srvc.CallMethod(service_descriptor.methods[1], rpc_controller,
+                    unittest_pb2.BarRequest(), MyCallback)
+    self.assertEqual(None, rpc_controller.failure_message)
+    self.assertEqual(True, srvc.bar_called)
+
+  def testServiceStub(self):
+    class MockRpcChannel(service.RpcChannel):
+      def CallMethod(self, method, controller, request,
+                     response_class, callback):
+        self.method = method
+        self.controller = controller
+        self.request = request
+        callback(response_class())
+
+    self.callback_response = None
+
+    def MyCallback(response):
+      self.callback_response = response
+
+    channel = MockRpcChannel()
+    stub = unittest_pb2.TestService_Stub(channel)
+    rpc_controller = 'controller'
+    request = 'request'
+
+    # GetDescriptor now static, still works as instance method for compatibility
+    self.assertEqual(unittest_pb2.TestService_Stub.GetDescriptor(),
+                     stub.GetDescriptor())
+
+    # Invoke method.
+    stub.Foo(rpc_controller, request, MyCallback)
+
+    self.assertIsInstance(self.callback_response, unittest_pb2.FooResponse)
+    self.assertEqual(request, channel.request)
+    self.assertEqual(rpc_controller, channel.controller)
+    self.assertEqual(stub.GetDescriptor().methods[0], channel.method)
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/symbol_database_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/symbol_database_test.py
new file mode 100644
index 0000000..af42681
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/symbol_database_test.py
@@ -0,0 +1,138 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests for google.protobuf.symbol_database."""
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import unittest_pb2
+from google.protobuf import descriptor
+from google.protobuf import descriptor_pool
+from google.protobuf import symbol_database
+
+
+class SymbolDatabaseTest(unittest.TestCase):
+
+  def _Database(self):
+    if descriptor._USE_C_DESCRIPTORS:
+      # The C++ implementation does not allow mixing descriptors from
+      # different pools.
+      db = symbol_database.SymbolDatabase(pool=descriptor_pool.Default())
+    else:
+      db = symbol_database.SymbolDatabase()
+    # Register representative types from unittest_pb2.
+    db.RegisterFileDescriptor(unittest_pb2.DESCRIPTOR)
+    db.RegisterMessage(unittest_pb2.TestAllTypes)
+    db.RegisterMessage(unittest_pb2.TestAllTypes.NestedMessage)
+    db.RegisterMessage(unittest_pb2.TestAllTypes.OptionalGroup)
+    db.RegisterMessage(unittest_pb2.TestAllTypes.RepeatedGroup)
+    db.RegisterEnumDescriptor(unittest_pb2.ForeignEnum.DESCRIPTOR)
+    db.RegisterEnumDescriptor(unittest_pb2.TestAllTypes.NestedEnum.DESCRIPTOR)
+    db.RegisterServiceDescriptor(unittest_pb2._TESTSERVICE)
+    return db
+
+  def testGetPrototype(self):
+    instance = self._Database().GetPrototype(
+        unittest_pb2.TestAllTypes.DESCRIPTOR)
+    self.assertTrue(instance is unittest_pb2.TestAllTypes)
+
+  def testGetMessages(self):
+    messages = self._Database().GetMessages(
+        ['google/protobuf/unittest.proto'])
+    self.assertTrue(
+        unittest_pb2.TestAllTypes is
+        messages['protobuf_unittest.TestAllTypes'])
+
+  def testGetSymbol(self):
+    self.assertEqual(
+        unittest_pb2.TestAllTypes, self._Database().GetSymbol(
+            'protobuf_unittest.TestAllTypes'))
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.NestedMessage, self._Database().GetSymbol(
+            'protobuf_unittest.TestAllTypes.NestedMessage'))
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.OptionalGroup, self._Database().GetSymbol(
+            'protobuf_unittest.TestAllTypes.OptionalGroup'))
+    self.assertEqual(
+        unittest_pb2.TestAllTypes.RepeatedGroup, self._Database().GetSymbol(
+            'protobuf_unittest.TestAllTypes.RepeatedGroup'))
+
+  def testEnums(self):
+    # Check registration of types in the pool.
+    self.assertEqual(
+        'protobuf_unittest.ForeignEnum',
+        self._Database().pool.FindEnumTypeByName(
+            'protobuf_unittest.ForeignEnum').full_name)
+    self.assertEqual(
+        'protobuf_unittest.TestAllTypes.NestedEnum',
+        self._Database().pool.FindEnumTypeByName(
+            'protobuf_unittest.TestAllTypes.NestedEnum').full_name)
+
+  def testFindMessageTypeByName(self):
+    self.assertEqual(
+        'protobuf_unittest.TestAllTypes',
+        self._Database().pool.FindMessageTypeByName(
+            'protobuf_unittest.TestAllTypes').full_name)
+    self.assertEqual(
+        'protobuf_unittest.TestAllTypes.NestedMessage',
+        self._Database().pool.FindMessageTypeByName(
+            'protobuf_unittest.TestAllTypes.NestedMessage').full_name)
+
+  def testFindServiceByName(self):
+    self.assertEqual(
+        'protobuf_unittest.TestService',
+        self._Database().pool.FindServiceByName(
+            'protobuf_unittest.TestService').full_name)
+
+  def testFindFileContainingSymbol(self):
+    # Lookup based on either enum or message.
+    self.assertEqual(
+        'google/protobuf/unittest.proto',
+        self._Database().pool.FindFileContainingSymbol(
+            'protobuf_unittest.TestAllTypes.NestedEnum').name)
+    self.assertEqual(
+        'google/protobuf/unittest.proto',
+        self._Database().pool.FindFileContainingSymbol(
+            'protobuf_unittest.TestAllTypes').name)
+
+  def testFindFileByName(self):
+    self.assertEqual(
+        'google/protobuf/unittest.proto',
+        self._Database().pool.FindFileByName(
+            'google/protobuf/unittest.proto').name)
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/test_bad_identifiers_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/test_bad_identifiers_pb2.py
new file mode 100644
index 0000000..0efabd4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/test_bad_identifiers_pb2.py
@@ -0,0 +1,166 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/test_bad_identifiers.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import service as _service
+from google.protobuf import service_reflection
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/test_bad_identifiers.proto',
+  package='protobuf_unittest',
+  syntax='proto2',
+  serialized_options=b'\220\001\001',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n3google/protobuf/internal/test_bad_identifiers.proto\x12\x11protobuf_unittest\"\x1e\n\x12TestBadIdentifiers*\x08\x08\x64\x10\x80\x80\x80\x80\x02\"\x10\n\x0e\x41notherMessage2\x10\n\x0e\x41notherService:;\n\x07message\x12%.protobuf_unittest.TestBadIdentifiers\x18\x64 \x01(\t:\x03\x66oo:>\n\ndescriptor\x12%.protobuf_unittest.TestBadIdentifiers\x18\x65 \x01(\t:\x03\x62\x61r:>\n\nreflection\x12%.protobuf_unittest.TestBadIdentifiers\x18\x66 \x01(\t:\x03\x62\x61z:;\n\x07service\x12%.protobuf_unittest.TestBadIdentifiers\x18g \x01(\t:\x03quxB\x03\x90\x01\x01'
+)
+
+
+MESSAGE_FIELD_NUMBER = 100
+message = _descriptor.FieldDescriptor(
+  name='message', full_name='protobuf_unittest.message', index=0,
+  number=100, type=9, cpp_type=9, label=1,
+  has_default_value=True, default_value=b"foo".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DESCRIPTOR_FIELD_NUMBER = 101
+descriptor = _descriptor.FieldDescriptor(
+  name='descriptor', full_name='protobuf_unittest.descriptor', index=1,
+  number=101, type=9, cpp_type=9, label=1,
+  has_default_value=True, default_value=b"bar".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REFLECTION_FIELD_NUMBER = 102
+reflection = _descriptor.FieldDescriptor(
+  name='reflection', full_name='protobuf_unittest.reflection', index=2,
+  number=102, type=9, cpp_type=9, label=1,
+  has_default_value=True, default_value=b"baz".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+SERVICE_FIELD_NUMBER = 103
+service = _descriptor.FieldDescriptor(
+  name='service', full_name='protobuf_unittest.service', index=3,
+  number=103, type=9, cpp_type=9, label=1,
+  has_default_value=True, default_value=b"qux".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+
+_TESTBADIDENTIFIERS = _descriptor.Descriptor(
+  name='TestBadIdentifiers',
+  full_name='protobuf_unittest.TestBadIdentifiers',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(100, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=74,
+  serialized_end=104,
+)
+
+
+_ANOTHERMESSAGE = _descriptor.Descriptor(
+  name='AnotherMessage',
+  full_name='protobuf_unittest.AnotherMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=106,
+  serialized_end=122,
+)
+
+DESCRIPTOR.message_types_by_name['TestBadIdentifiers'] = _TESTBADIDENTIFIERS
+DESCRIPTOR.message_types_by_name['AnotherMessage'] = _ANOTHERMESSAGE
+DESCRIPTOR.extensions_by_name['message'] = message
+DESCRIPTOR.extensions_by_name['descriptor'] = descriptor
+DESCRIPTOR.extensions_by_name['reflection'] = reflection
+DESCRIPTOR.extensions_by_name['service'] = service
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestBadIdentifiers = _reflection.GeneratedProtocolMessageType('TestBadIdentifiers', (_message.Message,), {
+  'DESCRIPTOR' : _TESTBADIDENTIFIERS,
+  '__module__' : 'google.protobuf.internal.test_bad_identifiers_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestBadIdentifiers)
+  })
+_sym_db.RegisterMessage(TestBadIdentifiers)
+
+AnotherMessage = _reflection.GeneratedProtocolMessageType('AnotherMessage', (_message.Message,), {
+  'DESCRIPTOR' : _ANOTHERMESSAGE,
+  '__module__' : 'google.protobuf.internal.test_bad_identifiers_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.AnotherMessage)
+  })
+_sym_db.RegisterMessage(AnotherMessage)
+
+TestBadIdentifiers.RegisterExtension(message)
+TestBadIdentifiers.RegisterExtension(descriptor)
+TestBadIdentifiers.RegisterExtension(reflection)
+TestBadIdentifiers.RegisterExtension(service)
+
+DESCRIPTOR._options = None
+
+_ANOTHERSERVICE = _descriptor.ServiceDescriptor(
+  name='AnotherService',
+  full_name='protobuf_unittest.AnotherService',
+  file=DESCRIPTOR,
+  index=0,
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_start=124,
+  serialized_end=140,
+  methods=[
+])
+_sym_db.RegisterServiceDescriptor(_ANOTHERSERVICE)
+
+DESCRIPTOR.services_by_name['AnotherService'] = _ANOTHERSERVICE
+
+AnotherService = service_reflection.GeneratedServiceType('AnotherService', (_service.Service,), dict(
+  DESCRIPTOR = _ANOTHERSERVICE,
+  __module__ = 'google.protobuf.internal.test_bad_identifiers_pb2'
+  ))
+
+AnotherService_Stub = service_reflection.GeneratedServiceStubType('AnotherService_Stub', (AnotherService,), dict(
+  DESCRIPTOR = _ANOTHERSERVICE,
+  __module__ = 'google.protobuf.internal.test_bad_identifiers_pb2'
+  ))
+
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/test_proto3_optional_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/test_proto3_optional_pb2.py
new file mode 100644
index 0000000..821f315
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/test_proto3_optional_pb2.py
@@ -0,0 +1,410 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/internal/test_proto3_optional.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/internal/test_proto3_optional.proto',
+  package='google.protobuf.python.internal',
+  syntax='proto3',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n3google/protobuf/internal/test_proto3_optional.proto\x12\x1fgoogle.protobuf.python.internal\"\xf8\x08\n\x12TestProto3Optional\x12\x1b\n\x0eoptional_int32\x18\x01 \x01(\x05H\x00\x88\x01\x01\x12\x1b\n\x0eoptional_int64\x18\x02 \x01(\x03H\x01\x88\x01\x01\x12\x1c\n\x0foptional_uint32\x18\x03 \x01(\rH\x02\x88\x01\x01\x12\x1c\n\x0foptional_uint64\x18\x04 \x01(\x04H\x03\x88\x01\x01\x12\x1c\n\x0foptional_sint32\x18\x05 \x01(\x11H\x04\x88\x01\x01\x12\x1c\n\x0foptional_sint64\x18\x06 \x01(\x12H\x05\x88\x01\x01\x12\x1d\n\x10optional_fixed32\x18\x07 \x01(\x07H\x06\x88\x01\x01\x12\x1d\n\x10optional_fixed64\x18\x08 \x01(\x06H\x07\x88\x01\x01\x12\x1e\n\x11optional_sfixed32\x18\t \x01(\x0fH\x08\x88\x01\x01\x12\x1e\n\x11optional_sfixed64\x18\n \x01(\x10H\t\x88\x01\x01\x12\x1b\n\x0eoptional_float\x18\x0b \x01(\x02H\n\x88\x01\x01\x12\x1c\n\x0foptional_double\x18\x0c \x01(\x01H\x0b\x88\x01\x01\x12\x1a\n\roptional_bool\x18\r \x01(\x08H\x0c\x88\x01\x01\x12\x1c\n\x0foptional_string\x18\x0e \x01(\tH\r\x88\x01\x01\x12\x1b\n\x0eoptional_bytes\x18\x0f \x01(\x0cH\x0e\x88\x01\x01\x12g\n\x17optional_nested_message\x18\x12 \x01(\x0b\x32\x41.google.protobuf.python.internal.TestProto3Optional.NestedMessageH\x0f\x88\x01\x01\x12\x61\n\x14optional_nested_enum\x18\x15 \x01(\x0e\x32>.google.protobuf.python.internal.TestProto3Optional.NestedEnumH\x10\x88\x01\x01\x1a\'\n\rNestedMessage\x12\x0f\n\x02\x62\x62\x18\x01 \x01(\x05H\x00\x88\x01\x01\x42\x05\n\x03_bb\"J\n\nNestedEnum\x12\x0f\n\x0bUNSPECIFIED\x10\x00\x12\x07\n\x03\x46OO\x10\x01\x12\x07\n\x03\x42\x41R\x10\x02\x12\x07\n\x03\x42\x41Z\x10\x03\x12\x10\n\x03NEG\x10\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01\x42\x11\n\x0f_optional_int32B\x11\n\x0f_optional_int64B\x12\n\x10_optional_uint32B\x12\n\x10_optional_uint64B\x12\n\x10_optional_sint32B\x12\n\x10_optional_sint64B\x13\n\x11_optional_fixed32B\x13\n\x11_optional_fixed64B\x14\n\x12_optional_sfixed32B\x14\n\x12_optional_sfixed64B\x11\n\x0f_optional_floatB\x12\n\x10_optional_doubleB\x10\n\x0e_optional_boolB\x12\n\x10_optional_stringB\x11\n\x0f_optional_bytesB\x1a\n\x18_optional_nested_messageB\x17\n\x15_optional_nested_enumb\x06proto3'
+)
+
+
+
+_TESTPROTO3OPTIONAL_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='google.protobuf.python.internal.TestProto3Optional.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='UNSPECIFIED', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOO', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAZ', index=3, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='NEG', index=4, number=-1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=806,
+  serialized_end=880,
+)
+_sym_db.RegisterEnumDescriptor(_TESTPROTO3OPTIONAL_NESTEDENUM)
+
+
+_TESTPROTO3OPTIONAL_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='google.protobuf.python.internal.TestProto3Optional.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bb', full_name='google.protobuf.python.internal.TestProto3Optional.NestedMessage.bb', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='_bb', full_name='google.protobuf.python.internal.TestProto3Optional.NestedMessage._bb',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=765,
+  serialized_end=804,
+)
+
+_TESTPROTO3OPTIONAL = _descriptor.Descriptor(
+  name='TestProto3Optional',
+  full_name='google.protobuf.python.internal.TestProto3Optional',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='google.protobuf.python.internal.TestProto3Optional.optional_int32', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_int64', full_name='google.protobuf.python.internal.TestProto3Optional.optional_int64', index=1,
+      number=2, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint32', full_name='google.protobuf.python.internal.TestProto3Optional.optional_uint32', index=2,
+      number=3, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint64', full_name='google.protobuf.python.internal.TestProto3Optional.optional_uint64', index=3,
+      number=4, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sint32', full_name='google.protobuf.python.internal.TestProto3Optional.optional_sint32', index=4,
+      number=5, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sint64', full_name='google.protobuf.python.internal.TestProto3Optional.optional_sint64', index=5,
+      number=6, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_fixed32', full_name='google.protobuf.python.internal.TestProto3Optional.optional_fixed32', index=6,
+      number=7, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_fixed64', full_name='google.protobuf.python.internal.TestProto3Optional.optional_fixed64', index=7,
+      number=8, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sfixed32', full_name='google.protobuf.python.internal.TestProto3Optional.optional_sfixed32', index=8,
+      number=9, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sfixed64', full_name='google.protobuf.python.internal.TestProto3Optional.optional_sfixed64', index=9,
+      number=10, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_float', full_name='google.protobuf.python.internal.TestProto3Optional.optional_float', index=10,
+      number=11, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_double', full_name='google.protobuf.python.internal.TestProto3Optional.optional_double', index=11,
+      number=12, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bool', full_name='google.protobuf.python.internal.TestProto3Optional.optional_bool', index=12,
+      number=13, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string', full_name='google.protobuf.python.internal.TestProto3Optional.optional_string', index=13,
+      number=14, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bytes', full_name='google.protobuf.python.internal.TestProto3Optional.optional_bytes', index=14,
+      number=15, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_message', full_name='google.protobuf.python.internal.TestProto3Optional.optional_nested_message', index=15,
+      number=18, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_enum', full_name='google.protobuf.python.internal.TestProto3Optional.optional_nested_enum', index=16,
+      number=21, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTPROTO3OPTIONAL_NESTEDMESSAGE, ],
+  enum_types=[
+    _TESTPROTO3OPTIONAL_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='_optional_int32', full_name='google.protobuf.python.internal.TestProto3Optional._optional_int32',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_int64', full_name='google.protobuf.python.internal.TestProto3Optional._optional_int64',
+      index=1, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_uint32', full_name='google.protobuf.python.internal.TestProto3Optional._optional_uint32',
+      index=2, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_uint64', full_name='google.protobuf.python.internal.TestProto3Optional._optional_uint64',
+      index=3, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_sint32', full_name='google.protobuf.python.internal.TestProto3Optional._optional_sint32',
+      index=4, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_sint64', full_name='google.protobuf.python.internal.TestProto3Optional._optional_sint64',
+      index=5, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_fixed32', full_name='google.protobuf.python.internal.TestProto3Optional._optional_fixed32',
+      index=6, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_fixed64', full_name='google.protobuf.python.internal.TestProto3Optional._optional_fixed64',
+      index=7, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_sfixed32', full_name='google.protobuf.python.internal.TestProto3Optional._optional_sfixed32',
+      index=8, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_sfixed64', full_name='google.protobuf.python.internal.TestProto3Optional._optional_sfixed64',
+      index=9, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_float', full_name='google.protobuf.python.internal.TestProto3Optional._optional_float',
+      index=10, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_double', full_name='google.protobuf.python.internal.TestProto3Optional._optional_double',
+      index=11, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_bool', full_name='google.protobuf.python.internal.TestProto3Optional._optional_bool',
+      index=12, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_string', full_name='google.protobuf.python.internal.TestProto3Optional._optional_string',
+      index=13, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_bytes', full_name='google.protobuf.python.internal.TestProto3Optional._optional_bytes',
+      index=14, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_nested_message', full_name='google.protobuf.python.internal.TestProto3Optional._optional_nested_message',
+      index=15, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='_optional_nested_enum', full_name='google.protobuf.python.internal.TestProto3Optional._optional_nested_enum',
+      index=16, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=89,
+  serialized_end=1233,
+)
+
+_TESTPROTO3OPTIONAL_NESTEDMESSAGE.containing_type = _TESTPROTO3OPTIONAL
+_TESTPROTO3OPTIONAL_NESTEDMESSAGE.oneofs_by_name['_bb'].fields.append(
+  _TESTPROTO3OPTIONAL_NESTEDMESSAGE.fields_by_name['bb'])
+_TESTPROTO3OPTIONAL_NESTEDMESSAGE.fields_by_name['bb'].containing_oneof = _TESTPROTO3OPTIONAL_NESTEDMESSAGE.oneofs_by_name['_bb']
+_TESTPROTO3OPTIONAL.fields_by_name['optional_nested_message'].message_type = _TESTPROTO3OPTIONAL_NESTEDMESSAGE
+_TESTPROTO3OPTIONAL.fields_by_name['optional_nested_enum'].enum_type = _TESTPROTO3OPTIONAL_NESTEDENUM
+_TESTPROTO3OPTIONAL_NESTEDENUM.containing_type = _TESTPROTO3OPTIONAL
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_int32'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_int32'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_int32'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_int32']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_int64'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_int64'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_int64'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_int64']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_uint32'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_uint32'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_uint32'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_uint32']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_uint64'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_uint64'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_uint64'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_uint64']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_sint32'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_sint32'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_sint32'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_sint32']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_sint64'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_sint64'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_sint64'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_sint64']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_fixed32'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_fixed32'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_fixed32'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_fixed32']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_fixed64'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_fixed64'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_fixed64'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_fixed64']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_sfixed32'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_sfixed32'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_sfixed32'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_sfixed32']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_sfixed64'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_sfixed64'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_sfixed64'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_sfixed64']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_float'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_float'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_float'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_float']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_double'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_double'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_double'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_double']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_bool'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_bool'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_bool'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_bool']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_string'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_string'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_string'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_string']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_bytes'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_bytes'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_bytes'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_bytes']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_nested_message'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_nested_message'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_nested_message'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_nested_message']
+_TESTPROTO3OPTIONAL.oneofs_by_name['_optional_nested_enum'].fields.append(
+  _TESTPROTO3OPTIONAL.fields_by_name['optional_nested_enum'])
+_TESTPROTO3OPTIONAL.fields_by_name['optional_nested_enum'].containing_oneof = _TESTPROTO3OPTIONAL.oneofs_by_name['_optional_nested_enum']
+DESCRIPTOR.message_types_by_name['TestProto3Optional'] = _TESTPROTO3OPTIONAL
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestProto3Optional = _reflection.GeneratedProtocolMessageType('TestProto3Optional', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTPROTO3OPTIONAL_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.internal.test_proto3_optional_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.TestProto3Optional.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _TESTPROTO3OPTIONAL,
+  '__module__' : 'google.protobuf.internal.test_proto3_optional_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.TestProto3Optional)
+  })
+_sym_db.RegisterMessage(TestProto3Optional)
+_sym_db.RegisterMessage(TestProto3Optional.NestedMessage)
+
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/test_util.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/test_util.py
new file mode 100644
index 0000000..a6e34ef
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/test_util.py
@@ -0,0 +1,868 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Utilities for Python proto2 tests.
+
+This is intentionally modeled on C++ code in
+//google/protobuf/test_util.*.
+"""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+import numbers
+import operator
+import os.path
+
+from google.protobuf import unittest_import_pb2
+from google.protobuf import unittest_pb2
+
+try:
+  long        # Python 2
+except NameError:
+  long = int  # Python 3
+
+
+# Tests whether the given TestAllTypes message is proto2 or not.
+# This is used to gate several fields/features that only exist
+# for the proto2 version of the message.
+def IsProto2(message):
+  return message.DESCRIPTOR.syntax == "proto2"
+
+
+def SetAllNonLazyFields(message):
+  """Sets every non-lazy field in the message to a unique value.
+
+  Args:
+    message: A TestAllTypes instance.
+  """
+
+  #
+  # Optional fields.
+  #
+
+  message.optional_int32    = 101
+  message.optional_int64    = 102
+  message.optional_uint32   = 103
+  message.optional_uint64   = 104
+  message.optional_sint32   = 105
+  message.optional_sint64   = 106
+  message.optional_fixed32  = 107
+  message.optional_fixed64  = 108
+  message.optional_sfixed32 = 109
+  message.optional_sfixed64 = 110
+  message.optional_float    = 111
+  message.optional_double   = 112
+  message.optional_bool     = True
+  message.optional_string   = u'115'
+  message.optional_bytes    = b'116'
+
+  if IsProto2(message):
+    message.optionalgroup.a = 117
+  message.optional_nested_message.bb = 118
+  message.optional_foreign_message.c = 119
+  message.optional_import_message.d = 120
+  message.optional_public_import_message.e = 126
+
+  message.optional_nested_enum = unittest_pb2.TestAllTypes.BAZ
+  message.optional_foreign_enum = unittest_pb2.FOREIGN_BAZ
+  if IsProto2(message):
+    message.optional_import_enum = unittest_import_pb2.IMPORT_BAZ
+
+  message.optional_string_piece = u'124'
+  message.optional_cord = u'125'
+
+  #
+  # Repeated fields.
+  #
+
+  message.repeated_int32.append(201)
+  message.repeated_int64.append(202)
+  message.repeated_uint32.append(203)
+  message.repeated_uint64.append(204)
+  message.repeated_sint32.append(205)
+  message.repeated_sint64.append(206)
+  message.repeated_fixed32.append(207)
+  message.repeated_fixed64.append(208)
+  message.repeated_sfixed32.append(209)
+  message.repeated_sfixed64.append(210)
+  message.repeated_float.append(211)
+  message.repeated_double.append(212)
+  message.repeated_bool.append(True)
+  message.repeated_string.append(u'215')
+  message.repeated_bytes.append(b'216')
+
+  if IsProto2(message):
+    message.repeatedgroup.add().a = 217
+  message.repeated_nested_message.add().bb = 218
+  message.repeated_foreign_message.add().c = 219
+  message.repeated_import_message.add().d = 220
+  message.repeated_lazy_message.add().bb = 227
+
+  message.repeated_nested_enum.append(unittest_pb2.TestAllTypes.BAR)
+  message.repeated_foreign_enum.append(unittest_pb2.FOREIGN_BAR)
+  if IsProto2(message):
+    message.repeated_import_enum.append(unittest_import_pb2.IMPORT_BAR)
+
+  message.repeated_string_piece.append(u'224')
+  message.repeated_cord.append(u'225')
+
+  # Add a second one of each field and set value by index.
+  message.repeated_int32.append(0)
+  message.repeated_int64.append(0)
+  message.repeated_uint32.append(0)
+  message.repeated_uint64.append(0)
+  message.repeated_sint32.append(0)
+  message.repeated_sint64.append(0)
+  message.repeated_fixed32.append(0)
+  message.repeated_fixed64.append(0)
+  message.repeated_sfixed32.append(0)
+  message.repeated_sfixed64.append(0)
+  message.repeated_float.append(0)
+  message.repeated_double.append(0)
+  message.repeated_bool.append(True)
+  message.repeated_string.append(u'0')
+  message.repeated_bytes.append(b'0')
+  message.repeated_int32[1] = 301
+  message.repeated_int64[1] = 302
+  message.repeated_uint32[1] = 303
+  message.repeated_uint64[1] = 304
+  message.repeated_sint32[1] = 305
+  message.repeated_sint64[1] = 306
+  message.repeated_fixed32[1] = 307
+  message.repeated_fixed64[1] = 308
+  message.repeated_sfixed32[1] = 309
+  message.repeated_sfixed64[1] = 310
+  message.repeated_float[1] = 311
+  message.repeated_double[1] = 312
+  message.repeated_bool[1] = False
+  message.repeated_string[1] = u'315'
+  message.repeated_bytes[1] = b'316'
+
+  if IsProto2(message):
+    message.repeatedgroup.add().a = 317
+  message.repeated_nested_message.add().bb = 318
+  message.repeated_foreign_message.add().c = 319
+  message.repeated_import_message.add().d = 320
+  message.repeated_lazy_message.add().bb = 327
+
+  message.repeated_nested_enum.append(unittest_pb2.TestAllTypes.BAR)
+  message.repeated_nested_enum[1] = unittest_pb2.TestAllTypes.BAZ
+  message.repeated_foreign_enum.append(unittest_pb2.FOREIGN_BAZ)
+  if IsProto2(message):
+    message.repeated_import_enum.append(unittest_import_pb2.IMPORT_BAZ)
+
+  message.repeated_string_piece.append(u'324')
+  message.repeated_cord.append(u'325')
+
+  #
+  # Fields that have defaults.
+  #
+
+  if IsProto2(message):
+    message.default_int32 = 401
+    message.default_int64 = 402
+    message.default_uint32 = 403
+    message.default_uint64 = 404
+    message.default_sint32 = 405
+    message.default_sint64 = 406
+    message.default_fixed32 = 407
+    message.default_fixed64 = 408
+    message.default_sfixed32 = 409
+    message.default_sfixed64 = 410
+    message.default_float = 411
+    message.default_double = 412
+    message.default_bool = False
+    message.default_string = '415'
+    message.default_bytes = b'416'
+
+    message.default_nested_enum = unittest_pb2.TestAllTypes.FOO
+    message.default_foreign_enum = unittest_pb2.FOREIGN_FOO
+    message.default_import_enum = unittest_import_pb2.IMPORT_FOO
+
+    message.default_string_piece = '424'
+    message.default_cord = '425'
+
+  message.oneof_uint32 = 601
+  message.oneof_nested_message.bb = 602
+  message.oneof_string = '603'
+  message.oneof_bytes = b'604'
+
+
+def SetAllFields(message):
+  SetAllNonLazyFields(message)
+  message.optional_lazy_message.bb = 127
+
+
+def SetAllExtensions(message):
+  """Sets every extension in the message to a unique value.
+
+  Args:
+    message: A unittest_pb2.TestAllExtensions instance.
+  """
+
+  extensions = message.Extensions
+  pb2 = unittest_pb2
+  import_pb2 = unittest_import_pb2
+
+  #
+  # Optional fields.
+  #
+
+  extensions[pb2.optional_int32_extension] = 101
+  extensions[pb2.optional_int64_extension] = 102
+  extensions[pb2.optional_uint32_extension] = 103
+  extensions[pb2.optional_uint64_extension] = 104
+  extensions[pb2.optional_sint32_extension] = 105
+  extensions[pb2.optional_sint64_extension] = 106
+  extensions[pb2.optional_fixed32_extension] = 107
+  extensions[pb2.optional_fixed64_extension] = 108
+  extensions[pb2.optional_sfixed32_extension] = 109
+  extensions[pb2.optional_sfixed64_extension] = 110
+  extensions[pb2.optional_float_extension] = 111
+  extensions[pb2.optional_double_extension] = 112
+  extensions[pb2.optional_bool_extension] = True
+  extensions[pb2.optional_string_extension] = u'115'
+  extensions[pb2.optional_bytes_extension] = b'116'
+
+  extensions[pb2.optionalgroup_extension].a = 117
+  extensions[pb2.optional_nested_message_extension].bb = 118
+  extensions[pb2.optional_foreign_message_extension].c = 119
+  extensions[pb2.optional_import_message_extension].d = 120
+  extensions[pb2.optional_public_import_message_extension].e = 126
+  extensions[pb2.optional_lazy_message_extension].bb = 127
+
+  extensions[pb2.optional_nested_enum_extension] = pb2.TestAllTypes.BAZ
+  extensions[pb2.optional_nested_enum_extension] = pb2.TestAllTypes.BAZ
+  extensions[pb2.optional_foreign_enum_extension] = pb2.FOREIGN_BAZ
+  extensions[pb2.optional_import_enum_extension] = import_pb2.IMPORT_BAZ
+
+  extensions[pb2.optional_string_piece_extension] = u'124'
+  extensions[pb2.optional_cord_extension] = u'125'
+
+  #
+  # Repeated fields.
+  #
+
+  extensions[pb2.repeated_int32_extension].append(201)
+  extensions[pb2.repeated_int64_extension].append(202)
+  extensions[pb2.repeated_uint32_extension].append(203)
+  extensions[pb2.repeated_uint64_extension].append(204)
+  extensions[pb2.repeated_sint32_extension].append(205)
+  extensions[pb2.repeated_sint64_extension].append(206)
+  extensions[pb2.repeated_fixed32_extension].append(207)
+  extensions[pb2.repeated_fixed64_extension].append(208)
+  extensions[pb2.repeated_sfixed32_extension].append(209)
+  extensions[pb2.repeated_sfixed64_extension].append(210)
+  extensions[pb2.repeated_float_extension].append(211)
+  extensions[pb2.repeated_double_extension].append(212)
+  extensions[pb2.repeated_bool_extension].append(True)
+  extensions[pb2.repeated_string_extension].append(u'215')
+  extensions[pb2.repeated_bytes_extension].append(b'216')
+
+  extensions[pb2.repeatedgroup_extension].add().a = 217
+  extensions[pb2.repeated_nested_message_extension].add().bb = 218
+  extensions[pb2.repeated_foreign_message_extension].add().c = 219
+  extensions[pb2.repeated_import_message_extension].add().d = 220
+  extensions[pb2.repeated_lazy_message_extension].add().bb = 227
+
+  extensions[pb2.repeated_nested_enum_extension].append(pb2.TestAllTypes.BAR)
+  extensions[pb2.repeated_foreign_enum_extension].append(pb2.FOREIGN_BAR)
+  extensions[pb2.repeated_import_enum_extension].append(import_pb2.IMPORT_BAR)
+
+  extensions[pb2.repeated_string_piece_extension].append(u'224')
+  extensions[pb2.repeated_cord_extension].append(u'225')
+
+  # Append a second one of each field.
+  extensions[pb2.repeated_int32_extension].append(301)
+  extensions[pb2.repeated_int64_extension].append(302)
+  extensions[pb2.repeated_uint32_extension].append(303)
+  extensions[pb2.repeated_uint64_extension].append(304)
+  extensions[pb2.repeated_sint32_extension].append(305)
+  extensions[pb2.repeated_sint64_extension].append(306)
+  extensions[pb2.repeated_fixed32_extension].append(307)
+  extensions[pb2.repeated_fixed64_extension].append(308)
+  extensions[pb2.repeated_sfixed32_extension].append(309)
+  extensions[pb2.repeated_sfixed64_extension].append(310)
+  extensions[pb2.repeated_float_extension].append(311)
+  extensions[pb2.repeated_double_extension].append(312)
+  extensions[pb2.repeated_bool_extension].append(False)
+  extensions[pb2.repeated_string_extension].append(u'315')
+  extensions[pb2.repeated_bytes_extension].append(b'316')
+
+  extensions[pb2.repeatedgroup_extension].add().a = 317
+  extensions[pb2.repeated_nested_message_extension].add().bb = 318
+  extensions[pb2.repeated_foreign_message_extension].add().c = 319
+  extensions[pb2.repeated_import_message_extension].add().d = 320
+  extensions[pb2.repeated_lazy_message_extension].add().bb = 327
+
+  extensions[pb2.repeated_nested_enum_extension].append(pb2.TestAllTypes.BAZ)
+  extensions[pb2.repeated_foreign_enum_extension].append(pb2.FOREIGN_BAZ)
+  extensions[pb2.repeated_import_enum_extension].append(import_pb2.IMPORT_BAZ)
+
+  extensions[pb2.repeated_string_piece_extension].append(u'324')
+  extensions[pb2.repeated_cord_extension].append(u'325')
+
+  #
+  # Fields with defaults.
+  #
+
+  extensions[pb2.default_int32_extension] = 401
+  extensions[pb2.default_int64_extension] = 402
+  extensions[pb2.default_uint32_extension] = 403
+  extensions[pb2.default_uint64_extension] = 404
+  extensions[pb2.default_sint32_extension] = 405
+  extensions[pb2.default_sint64_extension] = 406
+  extensions[pb2.default_fixed32_extension] = 407
+  extensions[pb2.default_fixed64_extension] = 408
+  extensions[pb2.default_sfixed32_extension] = 409
+  extensions[pb2.default_sfixed64_extension] = 410
+  extensions[pb2.default_float_extension] = 411
+  extensions[pb2.default_double_extension] = 412
+  extensions[pb2.default_bool_extension] = False
+  extensions[pb2.default_string_extension] = u'415'
+  extensions[pb2.default_bytes_extension] = b'416'
+
+  extensions[pb2.default_nested_enum_extension] = pb2.TestAllTypes.FOO
+  extensions[pb2.default_foreign_enum_extension] = pb2.FOREIGN_FOO
+  extensions[pb2.default_import_enum_extension] = import_pb2.IMPORT_FOO
+
+  extensions[pb2.default_string_piece_extension] = u'424'
+  extensions[pb2.default_cord_extension] = '425'
+
+  extensions[pb2.oneof_uint32_extension] = 601
+  extensions[pb2.oneof_nested_message_extension].bb = 602
+  extensions[pb2.oneof_string_extension] = u'603'
+  extensions[pb2.oneof_bytes_extension] = b'604'
+
+
+def SetAllFieldsAndExtensions(message):
+  """Sets every field and extension in the message to a unique value.
+
+  Args:
+    message: A unittest_pb2.TestAllExtensions message.
+  """
+  message.my_int = 1
+  message.my_string = 'foo'
+  message.my_float = 1.0
+  message.Extensions[unittest_pb2.my_extension_int] = 23
+  message.Extensions[unittest_pb2.my_extension_string] = 'bar'
+
+
+def ExpectAllFieldsAndExtensionsInOrder(serialized):
+  """Ensures that serialized is the serialization we expect for a message
+  filled with SetAllFieldsAndExtensions().  (Specifically, ensures that the
+  serialization is in canonical, tag-number order).
+  """
+  my_extension_int = unittest_pb2.my_extension_int
+  my_extension_string = unittest_pb2.my_extension_string
+  expected_strings = []
+  message = unittest_pb2.TestFieldOrderings()
+  message.my_int = 1  # Field 1.
+  expected_strings.append(message.SerializeToString())
+  message.Clear()
+  message.Extensions[my_extension_int] = 23  # Field 5.
+  expected_strings.append(message.SerializeToString())
+  message.Clear()
+  message.my_string = 'foo'  # Field 11.
+  expected_strings.append(message.SerializeToString())
+  message.Clear()
+  message.Extensions[my_extension_string] = 'bar'  # Field 50.
+  expected_strings.append(message.SerializeToString())
+  message.Clear()
+  message.my_float = 1.0
+  expected_strings.append(message.SerializeToString())
+  message.Clear()
+  expected = b''.join(expected_strings)
+
+  if expected != serialized:
+    raise ValueError('Expected %r, found %r' % (expected, serialized))
+
+
+def ExpectAllFieldsSet(test_case, message):
+  """Check all fields for correct values have after Set*Fields() is called."""
+  test_case.assertTrue(message.HasField('optional_int32'))
+  test_case.assertTrue(message.HasField('optional_int64'))
+  test_case.assertTrue(message.HasField('optional_uint32'))
+  test_case.assertTrue(message.HasField('optional_uint64'))
+  test_case.assertTrue(message.HasField('optional_sint32'))
+  test_case.assertTrue(message.HasField('optional_sint64'))
+  test_case.assertTrue(message.HasField('optional_fixed32'))
+  test_case.assertTrue(message.HasField('optional_fixed64'))
+  test_case.assertTrue(message.HasField('optional_sfixed32'))
+  test_case.assertTrue(message.HasField('optional_sfixed64'))
+  test_case.assertTrue(message.HasField('optional_float'))
+  test_case.assertTrue(message.HasField('optional_double'))
+  test_case.assertTrue(message.HasField('optional_bool'))
+  test_case.assertTrue(message.HasField('optional_string'))
+  test_case.assertTrue(message.HasField('optional_bytes'))
+
+  if IsProto2(message):
+    test_case.assertTrue(message.HasField('optionalgroup'))
+  test_case.assertTrue(message.HasField('optional_nested_message'))
+  test_case.assertTrue(message.HasField('optional_foreign_message'))
+  test_case.assertTrue(message.HasField('optional_import_message'))
+
+  test_case.assertTrue(message.optionalgroup.HasField('a'))
+  test_case.assertTrue(message.optional_nested_message.HasField('bb'))
+  test_case.assertTrue(message.optional_foreign_message.HasField('c'))
+  test_case.assertTrue(message.optional_import_message.HasField('d'))
+
+  test_case.assertTrue(message.HasField('optional_nested_enum'))
+  test_case.assertTrue(message.HasField('optional_foreign_enum'))
+  if IsProto2(message):
+    test_case.assertTrue(message.HasField('optional_import_enum'))
+
+  test_case.assertTrue(message.HasField('optional_string_piece'))
+  test_case.assertTrue(message.HasField('optional_cord'))
+
+  test_case.assertEqual(101, message.optional_int32)
+  test_case.assertEqual(102, message.optional_int64)
+  test_case.assertEqual(103, message.optional_uint32)
+  test_case.assertEqual(104, message.optional_uint64)
+  test_case.assertEqual(105, message.optional_sint32)
+  test_case.assertEqual(106, message.optional_sint64)
+  test_case.assertEqual(107, message.optional_fixed32)
+  test_case.assertEqual(108, message.optional_fixed64)
+  test_case.assertEqual(109, message.optional_sfixed32)
+  test_case.assertEqual(110, message.optional_sfixed64)
+  test_case.assertEqual(111, message.optional_float)
+  test_case.assertEqual(112, message.optional_double)
+  test_case.assertEqual(True, message.optional_bool)
+  test_case.assertEqual('115', message.optional_string)
+  test_case.assertEqual(b'116', message.optional_bytes)
+
+  if IsProto2(message):
+    test_case.assertEqual(117, message.optionalgroup.a)
+  test_case.assertEqual(118, message.optional_nested_message.bb)
+  test_case.assertEqual(119, message.optional_foreign_message.c)
+  test_case.assertEqual(120, message.optional_import_message.d)
+  test_case.assertEqual(126, message.optional_public_import_message.e)
+  test_case.assertEqual(127, message.optional_lazy_message.bb)
+
+  test_case.assertEqual(unittest_pb2.TestAllTypes.BAZ,
+                        message.optional_nested_enum)
+  test_case.assertEqual(unittest_pb2.FOREIGN_BAZ,
+                        message.optional_foreign_enum)
+  if IsProto2(message):
+    test_case.assertEqual(unittest_import_pb2.IMPORT_BAZ,
+                          message.optional_import_enum)
+
+  # -----------------------------------------------------------------
+
+  test_case.assertEqual(2, len(message.repeated_int32))
+  test_case.assertEqual(2, len(message.repeated_int64))
+  test_case.assertEqual(2, len(message.repeated_uint32))
+  test_case.assertEqual(2, len(message.repeated_uint64))
+  test_case.assertEqual(2, len(message.repeated_sint32))
+  test_case.assertEqual(2, len(message.repeated_sint64))
+  test_case.assertEqual(2, len(message.repeated_fixed32))
+  test_case.assertEqual(2, len(message.repeated_fixed64))
+  test_case.assertEqual(2, len(message.repeated_sfixed32))
+  test_case.assertEqual(2, len(message.repeated_sfixed64))
+  test_case.assertEqual(2, len(message.repeated_float))
+  test_case.assertEqual(2, len(message.repeated_double))
+  test_case.assertEqual(2, len(message.repeated_bool))
+  test_case.assertEqual(2, len(message.repeated_string))
+  test_case.assertEqual(2, len(message.repeated_bytes))
+
+  if IsProto2(message):
+    test_case.assertEqual(2, len(message.repeatedgroup))
+  test_case.assertEqual(2, len(message.repeated_nested_message))
+  test_case.assertEqual(2, len(message.repeated_foreign_message))
+  test_case.assertEqual(2, len(message.repeated_import_message))
+  test_case.assertEqual(2, len(message.repeated_nested_enum))
+  test_case.assertEqual(2, len(message.repeated_foreign_enum))
+  if IsProto2(message):
+    test_case.assertEqual(2, len(message.repeated_import_enum))
+
+  test_case.assertEqual(2, len(message.repeated_string_piece))
+  test_case.assertEqual(2, len(message.repeated_cord))
+
+  test_case.assertEqual(201, message.repeated_int32[0])
+  test_case.assertEqual(202, message.repeated_int64[0])
+  test_case.assertEqual(203, message.repeated_uint32[0])
+  test_case.assertEqual(204, message.repeated_uint64[0])
+  test_case.assertEqual(205, message.repeated_sint32[0])
+  test_case.assertEqual(206, message.repeated_sint64[0])
+  test_case.assertEqual(207, message.repeated_fixed32[0])
+  test_case.assertEqual(208, message.repeated_fixed64[0])
+  test_case.assertEqual(209, message.repeated_sfixed32[0])
+  test_case.assertEqual(210, message.repeated_sfixed64[0])
+  test_case.assertEqual(211, message.repeated_float[0])
+  test_case.assertEqual(212, message.repeated_double[0])
+  test_case.assertEqual(True, message.repeated_bool[0])
+  test_case.assertEqual('215', message.repeated_string[0])
+  test_case.assertEqual(b'216', message.repeated_bytes[0])
+
+  if IsProto2(message):
+    test_case.assertEqual(217, message.repeatedgroup[0].a)
+  test_case.assertEqual(218, message.repeated_nested_message[0].bb)
+  test_case.assertEqual(219, message.repeated_foreign_message[0].c)
+  test_case.assertEqual(220, message.repeated_import_message[0].d)
+  test_case.assertEqual(227, message.repeated_lazy_message[0].bb)
+
+  test_case.assertEqual(unittest_pb2.TestAllTypes.BAR,
+                        message.repeated_nested_enum[0])
+  test_case.assertEqual(unittest_pb2.FOREIGN_BAR,
+                        message.repeated_foreign_enum[0])
+  if IsProto2(message):
+    test_case.assertEqual(unittest_import_pb2.IMPORT_BAR,
+                          message.repeated_import_enum[0])
+
+  test_case.assertEqual(301, message.repeated_int32[1])
+  test_case.assertEqual(302, message.repeated_int64[1])
+  test_case.assertEqual(303, message.repeated_uint32[1])
+  test_case.assertEqual(304, message.repeated_uint64[1])
+  test_case.assertEqual(305, message.repeated_sint32[1])
+  test_case.assertEqual(306, message.repeated_sint64[1])
+  test_case.assertEqual(307, message.repeated_fixed32[1])
+  test_case.assertEqual(308, message.repeated_fixed64[1])
+  test_case.assertEqual(309, message.repeated_sfixed32[1])
+  test_case.assertEqual(310, message.repeated_sfixed64[1])
+  test_case.assertEqual(311, message.repeated_float[1])
+  test_case.assertEqual(312, message.repeated_double[1])
+  test_case.assertEqual(False, message.repeated_bool[1])
+  test_case.assertEqual('315', message.repeated_string[1])
+  test_case.assertEqual(b'316', message.repeated_bytes[1])
+
+  if IsProto2(message):
+    test_case.assertEqual(317, message.repeatedgroup[1].a)
+  test_case.assertEqual(318, message.repeated_nested_message[1].bb)
+  test_case.assertEqual(319, message.repeated_foreign_message[1].c)
+  test_case.assertEqual(320, message.repeated_import_message[1].d)
+  test_case.assertEqual(327, message.repeated_lazy_message[1].bb)
+
+  test_case.assertEqual(unittest_pb2.TestAllTypes.BAZ,
+                        message.repeated_nested_enum[1])
+  test_case.assertEqual(unittest_pb2.FOREIGN_BAZ,
+                        message.repeated_foreign_enum[1])
+  if IsProto2(message):
+    test_case.assertEqual(unittest_import_pb2.IMPORT_BAZ,
+                          message.repeated_import_enum[1])
+
+  # -----------------------------------------------------------------
+
+  if IsProto2(message):
+    test_case.assertTrue(message.HasField('default_int32'))
+    test_case.assertTrue(message.HasField('default_int64'))
+    test_case.assertTrue(message.HasField('default_uint32'))
+    test_case.assertTrue(message.HasField('default_uint64'))
+    test_case.assertTrue(message.HasField('default_sint32'))
+    test_case.assertTrue(message.HasField('default_sint64'))
+    test_case.assertTrue(message.HasField('default_fixed32'))
+    test_case.assertTrue(message.HasField('default_fixed64'))
+    test_case.assertTrue(message.HasField('default_sfixed32'))
+    test_case.assertTrue(message.HasField('default_sfixed64'))
+    test_case.assertTrue(message.HasField('default_float'))
+    test_case.assertTrue(message.HasField('default_double'))
+    test_case.assertTrue(message.HasField('default_bool'))
+    test_case.assertTrue(message.HasField('default_string'))
+    test_case.assertTrue(message.HasField('default_bytes'))
+
+    test_case.assertTrue(message.HasField('default_nested_enum'))
+    test_case.assertTrue(message.HasField('default_foreign_enum'))
+    test_case.assertTrue(message.HasField('default_import_enum'))
+
+    test_case.assertEqual(401, message.default_int32)
+    test_case.assertEqual(402, message.default_int64)
+    test_case.assertEqual(403, message.default_uint32)
+    test_case.assertEqual(404, message.default_uint64)
+    test_case.assertEqual(405, message.default_sint32)
+    test_case.assertEqual(406, message.default_sint64)
+    test_case.assertEqual(407, message.default_fixed32)
+    test_case.assertEqual(408, message.default_fixed64)
+    test_case.assertEqual(409, message.default_sfixed32)
+    test_case.assertEqual(410, message.default_sfixed64)
+    test_case.assertEqual(411, message.default_float)
+    test_case.assertEqual(412, message.default_double)
+    test_case.assertEqual(False, message.default_bool)
+    test_case.assertEqual('415', message.default_string)
+    test_case.assertEqual(b'416', message.default_bytes)
+
+    test_case.assertEqual(unittest_pb2.TestAllTypes.FOO,
+                          message.default_nested_enum)
+    test_case.assertEqual(unittest_pb2.FOREIGN_FOO,
+                          message.default_foreign_enum)
+    test_case.assertEqual(unittest_import_pb2.IMPORT_FOO,
+                          message.default_import_enum)
+
+
+def GoldenFile(filename):
+  """Finds the given golden file and returns a file object representing it."""
+
+  # Search up the directory tree looking for the C++ protobuf source code.
+  path = '.'
+  while os.path.exists(path):
+    if os.path.exists(os.path.join(path, 'src/google/protobuf')):
+      # Found it.  Load the golden file from the testdata directory.
+      full_path = os.path.join(path, 'src/google/protobuf/testdata', filename)
+      return open(full_path, 'rb')
+    path = os.path.join(path, '..')
+
+  # Search internally.
+  path = '.'
+  full_path = os.path.join(path, 'third_party/py/google/protobuf/testdata',
+                           filename)
+  if os.path.exists(full_path):
+    # Found it.  Load the golden file from the testdata directory.
+    return open(full_path, 'rb')
+
+  raise RuntimeError(
+      'Could not find golden files.  This test must be run from within the '
+      'protobuf source package so that it can read test data files from the '
+      'C++ source tree.')
+
+
+def GoldenFileData(filename):
+  """Finds the given golden file and returns its contents."""
+  with GoldenFile(filename) as f:
+    return f.read()
+
+
+def SetAllPackedFields(message):
+  """Sets every field in the message to a unique value.
+
+  Args:
+    message: A TestPackedTypes instance.
+  """
+  message.packed_int32.extend([601, 701])
+  message.packed_int64.extend([602, 702])
+  message.packed_uint32.extend([603, 703])
+  message.packed_uint64.extend([604, 704])
+  message.packed_sint32.extend([605, 705])
+  message.packed_sint64.extend([606, 706])
+  message.packed_fixed32.extend([607, 707])
+  message.packed_fixed64.extend([608, 708])
+  message.packed_sfixed32.extend([609, 709])
+  message.packed_sfixed64.extend([610, 710])
+  message.packed_float.extend([611.0, 711.0])
+  message.packed_double.extend([612.0, 712.0])
+  message.packed_bool.extend([True, False])
+  message.packed_enum.extend([unittest_pb2.FOREIGN_BAR,
+                              unittest_pb2.FOREIGN_BAZ])
+
+
+def SetAllPackedExtensions(message):
+  """Sets every extension in the message to a unique value.
+
+  Args:
+    message: A unittest_pb2.TestPackedExtensions instance.
+  """
+  extensions = message.Extensions
+  pb2 = unittest_pb2
+
+  extensions[pb2.packed_int32_extension].extend([601, 701])
+  extensions[pb2.packed_int64_extension].extend([602, 702])
+  extensions[pb2.packed_uint32_extension].extend([603, 703])
+  extensions[pb2.packed_uint64_extension].extend([604, 704])
+  extensions[pb2.packed_sint32_extension].extend([605, 705])
+  extensions[pb2.packed_sint64_extension].extend([606, 706])
+  extensions[pb2.packed_fixed32_extension].extend([607, 707])
+  extensions[pb2.packed_fixed64_extension].extend([608, 708])
+  extensions[pb2.packed_sfixed32_extension].extend([609, 709])
+  extensions[pb2.packed_sfixed64_extension].extend([610, 710])
+  extensions[pb2.packed_float_extension].extend([611.0, 711.0])
+  extensions[pb2.packed_double_extension].extend([612.0, 712.0])
+  extensions[pb2.packed_bool_extension].extend([True, False])
+  extensions[pb2.packed_enum_extension].extend([unittest_pb2.FOREIGN_BAR,
+                                                unittest_pb2.FOREIGN_BAZ])
+
+
+def SetAllUnpackedFields(message):
+  """Sets every field in the message to a unique value.
+
+  Args:
+    message: A unittest_pb2.TestUnpackedTypes instance.
+  """
+  message.unpacked_int32.extend([601, 701])
+  message.unpacked_int64.extend([602, 702])
+  message.unpacked_uint32.extend([603, 703])
+  message.unpacked_uint64.extend([604, 704])
+  message.unpacked_sint32.extend([605, 705])
+  message.unpacked_sint64.extend([606, 706])
+  message.unpacked_fixed32.extend([607, 707])
+  message.unpacked_fixed64.extend([608, 708])
+  message.unpacked_sfixed32.extend([609, 709])
+  message.unpacked_sfixed64.extend([610, 710])
+  message.unpacked_float.extend([611.0, 711.0])
+  message.unpacked_double.extend([612.0, 712.0])
+  message.unpacked_bool.extend([True, False])
+  message.unpacked_enum.extend([unittest_pb2.FOREIGN_BAR,
+                                unittest_pb2.FOREIGN_BAZ])
+
+
+class NonStandardInteger(numbers.Integral):
+  """An integer object that does not subclass int.
+
+  This is used to verify that both C++ and regular proto systems can handle
+  integer others than int and long and that they handle them in predictable
+  ways.
+
+  NonStandardInteger is the minimal legal specification for a custom Integral.
+  As such, it does not support 0 < x < 5 and it is not hashable.
+
+  Note: This is added here instead of relying on numpy or a similar library
+  with custom integers to limit dependencies.
+  """
+
+  def __init__(self, val, error_string_on_conversion=None):
+    assert isinstance(val, numbers.Integral)
+    if isinstance(val, NonStandardInteger):
+      val = val.val
+    self.val = val
+    self.error_string_on_conversion = error_string_on_conversion
+
+  def __long__(self):
+    if self.error_string_on_conversion:
+      raise RuntimeError(self.error_string_on_conversion)
+    return long(self.val)
+
+  def __abs__(self):
+    return NonStandardInteger(operator.abs(self.val))
+
+  def __add__(self, y):
+    return NonStandardInteger(operator.add(self.val, y))
+
+  def __div__(self, y):
+    return NonStandardInteger(operator.div(self.val, y))
+
+  def __eq__(self, y):
+    return operator.eq(self.val, y)
+
+  def __floordiv__(self, y):
+    return NonStandardInteger(operator.floordiv(self.val, y))
+
+  def __truediv__(self, y):
+    return NonStandardInteger(operator.truediv(self.val, y))
+
+  def __invert__(self):
+    return NonStandardInteger(operator.invert(self.val))
+
+  def __mod__(self, y):
+    return NonStandardInteger(operator.mod(self.val, y))
+
+  def __mul__(self, y):
+    return NonStandardInteger(operator.mul(self.val, y))
+
+  def __neg__(self):
+    return NonStandardInteger(operator.neg(self.val))
+
+  def __pos__(self):
+    return NonStandardInteger(operator.pos(self.val))
+
+  def __pow__(self, y):
+    return NonStandardInteger(operator.pow(self.val, y))
+
+  def __trunc__(self):
+    return int(self.val)
+
+  def __radd__(self, y):
+    return NonStandardInteger(operator.add(y, self.val))
+
+  def __rdiv__(self, y):
+    return NonStandardInteger(operator.div(y, self.val))
+
+  def __rmod__(self, y):
+    return NonStandardInteger(operator.mod(y, self.val))
+
+  def __rmul__(self, y):
+    return NonStandardInteger(operator.mul(y, self.val))
+
+  def __rpow__(self, y):
+    return NonStandardInteger(operator.pow(y, self.val))
+
+  def __rfloordiv__(self, y):
+    return NonStandardInteger(operator.floordiv(y, self.val))
+
+  def __rtruediv__(self, y):
+    return NonStandardInteger(operator.truediv(y, self.val))
+
+  def __lshift__(self, y):
+    return NonStandardInteger(operator.lshift(self.val, y))
+
+  def __rshift__(self, y):
+    return NonStandardInteger(operator.rshift(self.val, y))
+
+  def __rlshift__(self, y):
+    return NonStandardInteger(operator.lshift(y, self.val))
+
+  def __rrshift__(self, y):
+    return NonStandardInteger(operator.rshift(y, self.val))
+
+  def __le__(self, y):
+    if isinstance(y, NonStandardInteger):
+      y = y.val
+    return operator.le(self.val, y)
+
+  def __lt__(self, y):
+    if isinstance(y, NonStandardInteger):
+      y = y.val
+    return operator.lt(self.val, y)
+
+  def __and__(self, y):
+    return NonStandardInteger(operator.and_(self.val, y))
+
+  def __or__(self, y):
+    return NonStandardInteger(operator.or_(self.val, y))
+
+  def __xor__(self, y):
+    return NonStandardInteger(operator.xor(self.val, y))
+
+  def __rand__(self, y):
+    return NonStandardInteger(operator.and_(y, self.val))
+
+  def __ror__(self, y):
+    return NonStandardInteger(operator.or_(y, self.val))
+
+  def __rxor__(self, y):
+    return NonStandardInteger(operator.xor(y, self.val))
+
+  def __bool__(self):
+    return self.val
+
+  def __nonzero__(self):
+    return self.val
+
+  def __ceil__(self):
+    return self
+
+  def __floor__(self):
+    return self
+
+  def __int__(self):
+    if self.error_string_on_conversion:
+      raise RuntimeError(self.error_string_on_conversion)
+    return int(self.val)
+
+  def __round__(self):
+    return self
+
+  def __repr__(self):
+    return 'NonStandardInteger(%s)' % self.val
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/testing_refleaks.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/testing_refleaks.py
new file mode 100644
index 0000000..e448fce
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/testing_refleaks.py
@@ -0,0 +1,133 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""A subclass of unittest.TestCase which checks for reference leaks.
+
+To use:
+- Use testing_refleak.BaseTestCase instead of unittest.TestCase
+- Configure and compile Python with --with-pydebug
+
+If sys.gettotalrefcount() is not available (because Python was built without
+the Py_DEBUG option), then this module is a no-op and tests will run normally.
+"""
+
+import gc
+import sys
+
+try:
+  import copy_reg as copyreg  #PY26
+except ImportError:
+  import copyreg
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+
+class LocalTestResult(unittest.TestResult):
+  """A TestResult which forwards events to a parent object, except for Skips."""
+
+  def __init__(self, parent_result):
+    unittest.TestResult.__init__(self)
+    self.parent_result = parent_result
+
+  def addError(self, test, error):
+    self.parent_result.addError(test, error)
+
+  def addFailure(self, test, error):
+    self.parent_result.addFailure(test, error)
+
+  def addSkip(self, test, reason):
+    pass
+
+
+class ReferenceLeakCheckerMixin(object):
+  """A mixin class for TestCase, which checks reference counts."""
+
+  NB_RUNS = 3
+
+  def run(self, result=None):
+    # python_message.py registers all Message classes to some pickle global
+    # registry, which makes the classes immortal.
+    # We save a copy of this registry, and reset it before we could references.
+    self._saved_pickle_registry = copyreg.dispatch_table.copy()
+
+    # Run the test twice, to warm up the instance attributes.
+    super(ReferenceLeakCheckerMixin, self).run(result=result)
+    super(ReferenceLeakCheckerMixin, self).run(result=result)
+
+    oldrefcount = 0
+    local_result = LocalTestResult(result)
+
+    refcount_deltas = []
+    for _ in range(self.NB_RUNS):
+      oldrefcount = self._getRefcounts()
+      super(ReferenceLeakCheckerMixin, self).run(result=local_result)
+      newrefcount = self._getRefcounts()
+      refcount_deltas.append(newrefcount - oldrefcount)
+    print(refcount_deltas, self)
+
+    try:
+      self.assertEqual(refcount_deltas, [0] * self.NB_RUNS)
+    except Exception:  # pylint: disable=broad-except
+      result.addError(self, sys.exc_info())
+
+  def _getRefcounts(self):
+    copyreg.dispatch_table.clear()
+    copyreg.dispatch_table.update(self._saved_pickle_registry)
+    # It is sometimes necessary to gc.collect() multiple times, to ensure
+    # that all objects can be collected.
+    gc.collect()
+    gc.collect()
+    gc.collect()
+    return sys.gettotalrefcount()
+
+
+if hasattr(sys, 'gettotalrefcount'):
+
+  def TestCase(test_class):
+    new_bases = (ReferenceLeakCheckerMixin,) + test_class.__bases__
+    new_class = type(test_class)(
+        test_class.__name__, new_bases, dict(test_class.__dict__))
+    return new_class
+  SkipReferenceLeakChecker = unittest.skip
+
+else:
+  # When PyDEBUG is not enabled, run the tests normally.
+
+  def TestCase(test_class):
+    return test_class
+
+  def SkipReferenceLeakChecker(reason):
+    del reason  # Don't skip, so don't need a reason.
+    def Same(func):
+      return func
+    return Same
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/text_encoding_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/text_encoding_test.py
new file mode 100644
index 0000000..c7d182c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/text_encoding_test.py
@@ -0,0 +1,72 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Tests for google.protobuf.text_encoding."""
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import text_encoding
+
+TEST_VALUES = [
+    ("foo\\rbar\\nbaz\\t",
+     "foo\\rbar\\nbaz\\t",
+     b"foo\rbar\nbaz\t"),
+    ("\\'full of \\\"sound\\\" and \\\"fury\\\"\\'",
+     "\\'full of \\\"sound\\\" and \\\"fury\\\"\\'",
+     b"'full of \"sound\" and \"fury\"'"),
+    ("signi\\\\fying\\\\ nothing\\\\",
+     "signi\\\\fying\\\\ nothing\\\\",
+     b"signi\\fying\\ nothing\\"),
+    ("\\010\\t\\n\\013\\014\\r",
+     "\x08\\t\\n\x0b\x0c\\r",
+     b"\010\011\012\013\014\015")]
+
+
+class TextEncodingTestCase(unittest.TestCase):
+  def testCEscape(self):
+    for escaped, escaped_utf8, unescaped in TEST_VALUES:
+      self.assertEqual(escaped,
+                        text_encoding.CEscape(unescaped, as_utf8=False))
+      self.assertEqual(escaped_utf8,
+                        text_encoding.CEscape(unescaped, as_utf8=True))
+
+  def testCUnescape(self):
+    for escaped, escaped_utf8, unescaped in TEST_VALUES:
+      self.assertEqual(unescaped, text_encoding.CUnescape(escaped))
+      self.assertEqual(unescaped, text_encoding.CUnescape(escaped_utf8))
+
+
+if __name__ == "__main__":
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/text_format_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/text_format_test.py
new file mode 100644
index 0000000..9e84185
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/text_format_test.py
@@ -0,0 +1,2349 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Test for google.protobuf.text_format."""
+
+import io
+import math
+import re
+import string
+import textwrap
+
+import six
+
+# pylint: disable=g-import-not-at-top
+try:
+  import unittest2 as unittest  # PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import any_pb2
+from google.protobuf import any_test_pb2
+from google.protobuf import map_unittest_pb2
+from google.protobuf import unittest_custom_options_pb2
+from google.protobuf import unittest_mset_pb2
+from google.protobuf import unittest_pb2
+from google.protobuf import unittest_proto3_arena_pb2
+from google.protobuf import descriptor_pb2
+from google.protobuf.internal import any_test_pb2 as test_extend_any
+from google.protobuf.internal import message_set_extensions_pb2
+from google.protobuf.internal import test_proto3_optional_pb2
+from google.protobuf.internal import test_util
+from google.protobuf import descriptor_pool
+from google.protobuf import text_format
+from google.protobuf.internal import _parameterized
+# pylint: enable=g-import-not-at-top
+
+
+# Low-level nuts-n-bolts tests.
+class SimpleTextFormatTests(unittest.TestCase):
+
+  # The members of _QUOTES are formatted into a regexp template that
+  # expects single characters.  Therefore it's an error (in addition to being
+  # non-sensical in the first place) to try to specify a "quote mark" that is
+  # more than one character.
+  def testQuoteMarksAreSingleChars(self):
+    for quote in text_format._QUOTES:
+      self.assertEqual(1, len(quote))
+
+
+# Base class with some common functionality.
+class TextFormatBase(unittest.TestCase):
+
+  def ReadGolden(self, golden_filename):
+    with test_util.GoldenFile(golden_filename) as f:
+      return (f.readlines() if str is bytes else  # PY3
+              [golden_line.decode('utf-8') for golden_line in f])
+
+  def CompareToGoldenFile(self, text, golden_filename):
+    golden_lines = self.ReadGolden(golden_filename)
+    self.assertMultiLineEqual(text, ''.join(golden_lines))
+
+  def CompareToGoldenText(self, text, golden_text):
+    self.assertEqual(text, golden_text)
+
+  def RemoveRedundantZeros(self, text):
+    # Some platforms print 1e+5 as 1e+005.  This is fine, but we need to remove
+    # these zeros in order to match the golden file.
+    text = text.replace('e+0','e+').replace('e+0','e+') \
+               .replace('e-0','e-').replace('e-0','e-')
+    # Floating point fields are printed with .0 suffix even if they are
+    # actually integer numbers.
+    text = re.compile(r'\.0$', re.MULTILINE).sub('', text)
+    return text
+
+
+@_parameterized.parameters(unittest_pb2, unittest_proto3_arena_pb2)
+class TextFormatMessageToStringTests(TextFormatBase):
+
+  def testPrintExotic(self, message_module):
+    message = message_module.TestAllTypes()
+    message.repeated_int64.append(-9223372036854775808)
+    message.repeated_uint64.append(18446744073709551615)
+    message.repeated_double.append(123.456)
+    message.repeated_double.append(1.23e22)
+    message.repeated_double.append(1.23e-18)
+    message.repeated_string.append('\000\001\a\b\f\n\r\t\v\\\'"')
+    message.repeated_string.append(u'\u00fc\ua71f')
+    self.CompareToGoldenText(
+        self.RemoveRedundantZeros(text_format.MessageToString(message)),
+        'repeated_int64: -9223372036854775808\n'
+        'repeated_uint64: 18446744073709551615\n'
+        'repeated_double: 123.456\n'
+        'repeated_double: 1.23e+22\n'
+        'repeated_double: 1.23e-18\n'
+        'repeated_string:'
+        ' "\\000\\001\\007\\010\\014\\n\\r\\t\\013\\\\\\\'\\""\n'
+        'repeated_string: "\\303\\274\\352\\234\\237"\n')
+
+  def testPrintFloatPrecision(self, message_module):
+    message = message_module.TestAllTypes()
+
+    message.repeated_float.append(0.0)
+    message.repeated_float.append(0.8)
+    message.repeated_float.append(1.0)
+    message.repeated_float.append(1.2)
+    message.repeated_float.append(1.23)
+    message.repeated_float.append(1.234)
+    message.repeated_float.append(1.2345)
+    message.repeated_float.append(1.23456)
+    message.repeated_float.append(1.2e10)
+    message.repeated_float.append(1.23e10)
+    message.repeated_float.append(1.234e10)
+    message.repeated_float.append(1.2345e10)
+    message.repeated_float.append(1.23456e10)
+    message.repeated_double.append(0.0)
+    message.repeated_double.append(0.8)
+    message.repeated_double.append(1.0)
+    message.repeated_double.append(1.2)
+    message.repeated_double.append(1.23)
+    message.repeated_double.append(1.234)
+    message.repeated_double.append(1.2345)
+    message.repeated_double.append(1.23456)
+    message.repeated_double.append(1.234567)
+    message.repeated_double.append(1.2345678)
+    message.repeated_double.append(1.23456789)
+    message.repeated_double.append(1.234567898)
+    message.repeated_double.append(1.2345678987)
+    message.repeated_double.append(1.23456789876)
+    message.repeated_double.append(1.234567898765)
+    message.repeated_double.append(1.2345678987654)
+    message.repeated_double.append(1.23456789876543)
+    message.repeated_double.append(1.2e100)
+    message.repeated_double.append(1.23e100)
+    message.repeated_double.append(1.234e100)
+    message.repeated_double.append(1.2345e100)
+    message.repeated_double.append(1.23456e100)
+    message.repeated_double.append(1.234567e100)
+    message.repeated_double.append(1.2345678e100)
+    message.repeated_double.append(1.23456789e100)
+    message.repeated_double.append(1.234567898e100)
+    message.repeated_double.append(1.2345678987e100)
+    message.repeated_double.append(1.23456789876e100)
+    message.repeated_double.append(1.234567898765e100)
+    message.repeated_double.append(1.2345678987654e100)
+    message.repeated_double.append(1.23456789876543e100)
+    # pylint: disable=g-long-ternary
+    self.CompareToGoldenText(
+        self.RemoveRedundantZeros(text_format.MessageToString(message)),
+        'repeated_float: 0\n'
+        'repeated_float: 0.8\n'
+        'repeated_float: 1\n'
+        'repeated_float: 1.2\n'
+        'repeated_float: 1.23\n'
+        'repeated_float: 1.234\n'
+        'repeated_float: 1.2345\n'
+        'repeated_float: 1.23456\n'
+        # Note that these don't use scientific notation.
+        'repeated_float: 12000000000\n'
+        'repeated_float: 12300000000\n'
+        'repeated_float: 12340000000\n'
+        'repeated_float: 12345000000\n'
+        'repeated_float: 12345600000\n'
+        'repeated_double: 0\n'
+        'repeated_double: 0.8\n'
+        'repeated_double: 1\n'
+        'repeated_double: 1.2\n'
+        'repeated_double: 1.23\n'
+        'repeated_double: 1.234\n'
+        'repeated_double: 1.2345\n'
+        'repeated_double: 1.23456\n'
+        'repeated_double: 1.234567\n'
+        'repeated_double: 1.2345678\n'
+        'repeated_double: 1.23456789\n'
+        'repeated_double: 1.234567898\n'
+        'repeated_double: 1.2345678987\n'
+        'repeated_double: 1.23456789876\n' +
+        ('repeated_double: 1.23456789876\n'
+         'repeated_double: 1.23456789877\n'
+         'repeated_double: 1.23456789877\n'
+         if six.PY2 else
+         'repeated_double: 1.234567898765\n'
+         'repeated_double: 1.2345678987654\n'
+         'repeated_double: 1.23456789876543\n') +
+        'repeated_double: 1.2e+100\n'
+        'repeated_double: 1.23e+100\n'
+        'repeated_double: 1.234e+100\n'
+        'repeated_double: 1.2345e+100\n'
+        'repeated_double: 1.23456e+100\n'
+        'repeated_double: 1.234567e+100\n'
+        'repeated_double: 1.2345678e+100\n'
+        'repeated_double: 1.23456789e+100\n'
+        'repeated_double: 1.234567898e+100\n'
+        'repeated_double: 1.2345678987e+100\n'
+        'repeated_double: 1.23456789876e+100\n' +
+        ('repeated_double: 1.23456789877e+100\n'
+         'repeated_double: 1.23456789877e+100\n'
+         'repeated_double: 1.23456789877e+100\n'
+         if six.PY2 else
+         'repeated_double: 1.234567898765e+100\n'
+         'repeated_double: 1.2345678987654e+100\n'
+         'repeated_double: 1.23456789876543e+100\n'))
+
+  def testPrintExoticUnicodeSubclass(self, message_module):
+
+    class UnicodeSub(six.text_type):
+      pass
+
+    message = message_module.TestAllTypes()
+    message.repeated_string.append(UnicodeSub(u'\u00fc\ua71f'))
+    self.CompareToGoldenText(
+        text_format.MessageToString(message),
+        'repeated_string: "\\303\\274\\352\\234\\237"\n')
+
+  def testPrintNestedMessageAsOneLine(self, message_module):
+    message = message_module.TestAllTypes()
+    msg = message.repeated_nested_message.add()
+    msg.bb = 42
+    self.CompareToGoldenText(
+        text_format.MessageToString(message, as_one_line=True),
+        'repeated_nested_message { bb: 42 }')
+
+  def testPrintRepeatedFieldsAsOneLine(self, message_module):
+    message = message_module.TestAllTypes()
+    message.repeated_int32.append(1)
+    message.repeated_int32.append(1)
+    message.repeated_int32.append(3)
+    message.repeated_string.append('Google')
+    message.repeated_string.append('Zurich')
+    self.CompareToGoldenText(
+        text_format.MessageToString(message, as_one_line=True),
+        'repeated_int32: 1 repeated_int32: 1 repeated_int32: 3 '
+        'repeated_string: "Google" repeated_string: "Zurich"')
+
+  def VerifyPrintShortFormatRepeatedFields(self, message_module, as_one_line):
+    message = message_module.TestAllTypes()
+    message.repeated_int32.append(1)
+    message.repeated_string.append('Google')
+    message.repeated_string.append('Hello,World')
+    message.repeated_foreign_enum.append(unittest_pb2.FOREIGN_FOO)
+    message.repeated_foreign_enum.append(unittest_pb2.FOREIGN_BAR)
+    message.repeated_foreign_enum.append(unittest_pb2.FOREIGN_BAZ)
+    message.optional_nested_message.bb = 3
+    for i in (21, 32):
+      msg = message.repeated_nested_message.add()
+      msg.bb = i
+    expected_ascii = (
+        'optional_nested_message {\n  bb: 3\n}\n'
+        'repeated_int32: [1]\n'
+        'repeated_string: "Google"\n'
+        'repeated_string: "Hello,World"\n'
+        'repeated_nested_message {\n  bb: 21\n}\n'
+        'repeated_nested_message {\n  bb: 32\n}\n'
+        'repeated_foreign_enum: [FOREIGN_FOO, FOREIGN_BAR, FOREIGN_BAZ]\n')
+    if as_one_line:
+      expected_ascii = expected_ascii.replace('\n', ' ')
+      expected_ascii = re.sub(r'\s+', ' ', expected_ascii)
+      expected_ascii = re.sub(r'\s$', '', expected_ascii)
+
+    actual_ascii = text_format.MessageToString(
+        message, use_short_repeated_primitives=True,
+        as_one_line=as_one_line)
+    self.CompareToGoldenText(actual_ascii, expected_ascii)
+    parsed_message = message_module.TestAllTypes()
+    text_format.Parse(actual_ascii, parsed_message)
+    self.assertEqual(parsed_message, message)
+
+  def testPrintShortFormatRepeatedFields(self, message_module):
+    self.VerifyPrintShortFormatRepeatedFields(message_module, False)
+    self.VerifyPrintShortFormatRepeatedFields(message_module, True)
+
+  def testPrintNestedNewLineInStringAsOneLine(self, message_module):
+    message = message_module.TestAllTypes()
+    message.optional_string = 'a\nnew\nline'
+    self.CompareToGoldenText(
+        text_format.MessageToString(message, as_one_line=True),
+        'optional_string: "a\\nnew\\nline"')
+
+  def testPrintExoticAsOneLine(self, message_module):
+    message = message_module.TestAllTypes()
+    message.repeated_int64.append(-9223372036854775808)
+    message.repeated_uint64.append(18446744073709551615)
+    message.repeated_double.append(123.456)
+    message.repeated_double.append(1.23e22)
+    message.repeated_double.append(1.23e-18)
+    message.repeated_string.append('\000\001\a\b\f\n\r\t\v\\\'"')
+    message.repeated_string.append(u'\u00fc\ua71f')
+    self.CompareToGoldenText(
+        self.RemoveRedundantZeros(text_format.MessageToString(
+            message, as_one_line=True)),
+        'repeated_int64: -9223372036854775808'
+        ' repeated_uint64: 18446744073709551615'
+        ' repeated_double: 123.456'
+        ' repeated_double: 1.23e+22'
+        ' repeated_double: 1.23e-18'
+        ' repeated_string: '
+        '"\\000\\001\\007\\010\\014\\n\\r\\t\\013\\\\\\\'\\""'
+        ' repeated_string: "\\303\\274\\352\\234\\237"')
+
+  def testRoundTripExoticAsOneLine(self, message_module):
+    message = message_module.TestAllTypes()
+    message.repeated_int64.append(-9223372036854775808)
+    message.repeated_uint64.append(18446744073709551615)
+    message.repeated_double.append(123.456)
+    message.repeated_double.append(1.23e22)
+    message.repeated_double.append(1.23e-18)
+    message.repeated_string.append('\000\001\a\b\f\n\r\t\v\\\'"')
+    message.repeated_string.append(u'\u00fc\ua71f')
+
+    # Test as_utf8 = False.
+    wire_text = text_format.MessageToString(message,
+                                            as_one_line=True,
+                                            as_utf8=False)
+    parsed_message = message_module.TestAllTypes()
+    r = text_format.Parse(wire_text, parsed_message)
+    self.assertIs(r, parsed_message)
+    self.assertEqual(message, parsed_message)
+
+    # Test as_utf8 = True.
+    wire_text = text_format.MessageToString(message,
+                                            as_one_line=True,
+                                            as_utf8=True)
+    parsed_message = message_module.TestAllTypes()
+    r = text_format.Parse(wire_text, parsed_message)
+    self.assertIs(r, parsed_message)
+    self.assertEqual(message, parsed_message,
+                     '\n%s != %s' % (message, parsed_message))
+
+  def testPrintRawUtf8String(self, message_module):
+    message = message_module.TestAllTypes()
+    message.repeated_string.append(u'\u00fc\t\ua71f')
+    text = text_format.MessageToString(message, as_utf8=True)
+    golden_unicode = u'repeated_string: "\u00fc\\t\ua71f"\n'
+    golden_text = golden_unicode if six.PY3 else golden_unicode.encode('utf-8')
+    # MessageToString always returns a native str.
+    self.CompareToGoldenText(text, golden_text)
+    parsed_message = message_module.TestAllTypes()
+    text_format.Parse(text, parsed_message)
+    self.assertEqual(
+        message, parsed_message, '\n%s != %s  (%s != %s)' %
+        (message, parsed_message, message.repeated_string[0],
+         parsed_message.repeated_string[0]))
+
+  def testPrintFloatFormat(self, message_module):
+    # Check that float_format argument is passed to sub-message formatting.
+    message = message_module.NestedTestAllTypes()
+    message.payload.optional_float = 1.25
+    # Check rounding at 15 significant digits
+    message.payload.optional_double = -.000003456789012345678
+    # Check no decimal point.
+    message.payload.repeated_float.append(-5642)
+    # Check no trailing zeros.
+    message.payload.repeated_double.append(.000078900)
+    formatted_fields = ['optional_float: 1.25',
+                        'optional_double: -3.45678901234568e-6',
+                        'repeated_float: -5642', 'repeated_double: 7.89e-5']
+    text_message = text_format.MessageToString(message, float_format='.15g')
+    self.CompareToGoldenText(
+        self.RemoveRedundantZeros(text_message),
+        'payload {{\n  {0}\n  {1}\n  {2}\n  {3}\n}}\n'.format(
+            *formatted_fields))
+    # as_one_line=True is a separate code branch where float_format is passed.
+    text_message = text_format.MessageToString(message,
+                                               as_one_line=True,
+                                               float_format='.15g')
+    self.CompareToGoldenText(
+        self.RemoveRedundantZeros(text_message),
+        'payload {{ {0} {1} {2} {3} }}'.format(*formatted_fields))
+
+    # 32-bit 1.2 is noisy when extended to 64-bit:
+    #  >>> struct.unpack('f', struct.pack('f', 1.2))[0]
+    #  1.2000000476837158
+    message.payload.optional_float = 1.2
+    formatted_fields = ['optional_float: 1.2',
+                        'optional_double: -3.45678901234568e-6',
+                        'repeated_float: -5642', 'repeated_double: 7.89e-5']
+    text_message = text_format.MessageToString(message, float_format='.7g',
+                                               double_format='.15g')
+    self.CompareToGoldenText(
+        self.RemoveRedundantZeros(text_message),
+        'payload {{\n  {0}\n  {1}\n  {2}\n  {3}\n}}\n'.format(
+            *formatted_fields))
+
+    # Test only set float_format affect both float and double fields.
+    formatted_fields = ['optional_float: 1.2',
+                        'optional_double: -3.456789e-6',
+                        'repeated_float: -5642', 'repeated_double: 7.89e-5']
+    text_message = text_format.MessageToString(message, float_format='.7g')
+    self.CompareToGoldenText(
+        self.RemoveRedundantZeros(text_message),
+        'payload {{\n  {0}\n  {1}\n  {2}\n  {3}\n}}\n'.format(
+            *formatted_fields))
+
+    # Test default float_format will automatic print shortest float.
+    message.payload.optional_float = 1.2345678912
+    message.payload.optional_double = 1.2345678912
+    formatted_fields = ['optional_float: 1.2345679',
+                        'optional_double: 1.2345678912',
+                        'repeated_float: -5642', 'repeated_double: 7.89e-5']
+    text_message = text_format.MessageToString(message)
+    self.CompareToGoldenText(
+        self.RemoveRedundantZeros(text_message),
+        'payload {{\n  {0}\n  {1}\n  {2}\n  {3}\n}}\n'.format(
+            *formatted_fields))
+
+    message.Clear()
+    message.payload.optional_float = 1.1000000000011
+    self.assertEqual(text_format.MessageToString(message),
+                     'payload {\n  optional_float: 1.1\n}\n')
+    message.payload.optional_float = 1.00000075e-36
+    self.assertEqual(text_format.MessageToString(message),
+                     'payload {\n  optional_float: 1.00000075e-36\n}\n')
+    message.payload.optional_float = 12345678912345e+11
+    self.assertEqual(text_format.MessageToString(message),
+                     'payload {\n  optional_float: 1.234568e+24\n}\n')
+
+  def testMessageToString(self, message_module):
+    message = message_module.ForeignMessage()
+    message.c = 123
+    self.assertEqual('c: 123\n', str(message))
+
+  def testMessageToStringUnicode(self, message_module):
+    golden_unicode = u'Á short desçription and a 🍌.'
+    golden_bytes = golden_unicode.encode('utf-8')
+    message = message_module.TestAllTypes()
+    message.optional_string = golden_unicode
+    message.optional_bytes = golden_bytes
+    text = text_format.MessageToString(message, as_utf8=True)
+    golden_message = textwrap.dedent(
+        'optional_string: "Á short desçription and a 🍌."\n'
+        'optional_bytes: '
+        r'"\303\201 short des\303\247ription and a \360\237\215\214."'
+        '\n')
+    self.CompareToGoldenText(text, golden_message)
+
+  def testMessageToStringASCII(self, message_module):
+    golden_unicode = u'Á short desçription and a 🍌.'
+    golden_bytes = golden_unicode.encode('utf-8')
+    message = message_module.TestAllTypes()
+    message.optional_string = golden_unicode
+    message.optional_bytes = golden_bytes
+    text = text_format.MessageToString(message, as_utf8=False)  # ASCII
+    golden_message = (
+        'optional_string: '
+        r'"\303\201 short des\303\247ription and a \360\237\215\214."'
+        '\n'
+        'optional_bytes: '
+        r'"\303\201 short des\303\247ription and a \360\237\215\214."'
+        '\n')
+    self.CompareToGoldenText(text, golden_message)
+
+  def testPrintField(self, message_module):
+    message = message_module.TestAllTypes()
+    field = message.DESCRIPTOR.fields_by_name['optional_float']
+    value = message.optional_float
+    out = text_format.TextWriter(False)
+    text_format.PrintField(field, value, out)
+    self.assertEqual('optional_float: 0.0\n', out.getvalue())
+    out.close()
+    # Test Printer
+    out = text_format.TextWriter(False)
+    printer = text_format._Printer(out)
+    printer.PrintField(field, value)
+    self.assertEqual('optional_float: 0.0\n', out.getvalue())
+    out.close()
+
+  def testPrintFieldValue(self, message_module):
+    message = message_module.TestAllTypes()
+    field = message.DESCRIPTOR.fields_by_name['optional_float']
+    value = message.optional_float
+    out = text_format.TextWriter(False)
+    text_format.PrintFieldValue(field, value, out)
+    self.assertEqual('0.0', out.getvalue())
+    out.close()
+    # Test Printer
+    out = text_format.TextWriter(False)
+    printer = text_format._Printer(out)
+    printer.PrintFieldValue(field, value)
+    self.assertEqual('0.0', out.getvalue())
+    out.close()
+
+  def testCustomOptions(self, message_module):
+    message_descriptor = (unittest_custom_options_pb2.
+                          TestMessageWithCustomOptions.DESCRIPTOR)
+    message_proto = descriptor_pb2.DescriptorProto()
+    message_descriptor.CopyToProto(message_proto)
+    expected_text = (
+        'name: "TestMessageWithCustomOptions"\n'
+        'field {\n'
+        '  name: "field1"\n'
+        '  number: 1\n'
+        '  label: LABEL_OPTIONAL\n'
+        '  type: TYPE_STRING\n'
+        '  options {\n'
+        '    ctype: CORD\n'
+        '    [protobuf_unittest.field_opt1]: 8765432109\n'
+        '  }\n'
+        '}\n'
+        'field {\n'
+        '  name: "oneof_field"\n'
+        '  number: 2\n'
+        '  label: LABEL_OPTIONAL\n'
+        '  type: TYPE_INT32\n'
+        '  oneof_index: 0\n'
+        '}\n'
+        'enum_type {\n'
+        '  name: "AnEnum"\n'
+        '  value {\n'
+        '    name: "ANENUM_VAL1"\n'
+        '    number: 1\n'
+        '  }\n'
+        '  value {\n'
+        '    name: "ANENUM_VAL2"\n'
+        '    number: 2\n'
+        '    options {\n'
+        '      [protobuf_unittest.enum_value_opt1]: 123\n'
+        '    }\n'
+        '  }\n'
+        '  options {\n'
+        '    [protobuf_unittest.enum_opt1]: -789\n'
+        '  }\n'
+        '}\n'
+        'options {\n'
+        '  message_set_wire_format: false\n'
+        '  [protobuf_unittest.message_opt1]: -56\n'
+        '}\n'
+        'oneof_decl {\n'
+        '  name: "AnOneof"\n'
+        '  options {\n'
+        '    [protobuf_unittest.oneof_opt1]: -99\n'
+        '  }\n'
+        '}\n')
+    self.assertEqual(expected_text,
+                     text_format.MessageToString(message_proto))
+    parsed_proto = descriptor_pb2.DescriptorProto()
+    text_format.Parse(expected_text, parsed_proto)
+    self.assertEqual(message_proto, parsed_proto)
+
+  def testPrintUnknownFieldsEmbeddedMessageInBytes(self, message_module):
+    inner_msg = message_module.TestAllTypes()
+    inner_msg.optional_int32 = 101
+    inner_msg.optional_double = 102.0
+    inner_msg.optional_string = u'hello'
+    inner_msg.optional_bytes = b'103'
+    inner_msg.optional_nested_message.bb = 105
+    inner_data = inner_msg.SerializeToString()
+    outer_message = message_module.TestAllTypes()
+    outer_message.optional_int32 = 101
+    outer_message.optional_bytes = inner_data
+    all_data = outer_message.SerializeToString()
+    empty_message = message_module.TestEmptyMessage()
+    empty_message.ParseFromString(all_data)
+
+    self.assertEqual('  1: 101\n'
+                     '  15 {\n'
+                     '    1: 101\n'
+                     '    12: 4636878028842991616\n'
+                     '    14: "hello"\n'
+                     '    15: "103"\n'
+                     '    18 {\n'
+                     '      1: 105\n'
+                     '    }\n'
+                     '  }\n',
+                     text_format.MessageToString(empty_message,
+                                                 indent=2,
+                                                 print_unknown_fields=True))
+    self.assertEqual('1: 101 '
+                     '15 { '
+                     '1: 101 '
+                     '12: 4636878028842991616 '
+                     '14: "hello" '
+                     '15: "103" '
+                     '18 { 1: 105 } '
+                     '}',
+                     text_format.MessageToString(empty_message,
+                                                 print_unknown_fields=True,
+                                                 as_one_line=True))
+
+
+@_parameterized.parameters(unittest_pb2, unittest_proto3_arena_pb2)
+class TextFormatMessageToTextBytesTests(TextFormatBase):
+
+  def testMessageToBytes(self, message_module):
+    message = message_module.ForeignMessage()
+    message.c = 123
+    self.assertEqual(b'c: 123\n', text_format.MessageToBytes(message))
+
+  def testRawUtf8RoundTrip(self, message_module):
+    message = message_module.TestAllTypes()
+    message.repeated_string.append(u'\u00fc\t\ua71f')
+    utf8_text = text_format.MessageToBytes(message, as_utf8=True)
+    golden_bytes = b'repeated_string: "\xc3\xbc\\t\xea\x9c\x9f"\n'
+    self.CompareToGoldenText(utf8_text, golden_bytes)
+    parsed_message = message_module.TestAllTypes()
+    text_format.Parse(utf8_text, parsed_message)
+    self.assertEqual(
+        message, parsed_message, '\n%s != %s  (%s != %s)' %
+        (message, parsed_message, message.repeated_string[0],
+         parsed_message.repeated_string[0]))
+
+  def testEscapedUtf8ASCIIRoundTrip(self, message_module):
+    message = message_module.TestAllTypes()
+    message.repeated_string.append(u'\u00fc\t\ua71f')
+    ascii_text = text_format.MessageToBytes(message)  # as_utf8=False default
+    golden_bytes = b'repeated_string: "\\303\\274\\t\\352\\234\\237"\n'
+    self.CompareToGoldenText(ascii_text, golden_bytes)
+    parsed_message = message_module.TestAllTypes()
+    text_format.Parse(ascii_text, parsed_message)
+    self.assertEqual(
+        message, parsed_message, '\n%s != %s  (%s != %s)' %
+        (message, parsed_message, message.repeated_string[0],
+         parsed_message.repeated_string[0]))
+
+
+@_parameterized.parameters(unittest_pb2, unittest_proto3_arena_pb2)
+class TextFormatParserTests(TextFormatBase):
+
+  def testParseAllFields(self, message_module):
+    message = message_module.TestAllTypes()
+    test_util.SetAllFields(message)
+    ascii_text = text_format.MessageToString(message)
+
+    parsed_message = message_module.TestAllTypes()
+    text_format.Parse(ascii_text, parsed_message)
+    self.assertEqual(message, parsed_message)
+    if message_module is unittest_pb2:
+      test_util.ExpectAllFieldsSet(self, message)
+
+  def testParseAndMergeUtf8(self, message_module):
+    message = message_module.TestAllTypes()
+    test_util.SetAllFields(message)
+    ascii_text = text_format.MessageToString(message)
+    ascii_text = ascii_text.encode('utf-8')
+
+    parsed_message = message_module.TestAllTypes()
+    text_format.Parse(ascii_text, parsed_message)
+    self.assertEqual(message, parsed_message)
+    if message_module is unittest_pb2:
+      test_util.ExpectAllFieldsSet(self, message)
+
+    parsed_message.Clear()
+    text_format.Merge(ascii_text, parsed_message)
+    self.assertEqual(message, parsed_message)
+    if message_module is unittest_pb2:
+      test_util.ExpectAllFieldsSet(self, message)
+
+    msg2 = message_module.TestAllTypes()
+    text = (u'optional_string: "café"')
+    text_format.Merge(text, msg2)
+    self.assertEqual(msg2.optional_string, u'café')
+    msg2.Clear()
+    self.assertEqual(msg2.optional_string, u'')
+    text_format.Parse(text, msg2)
+    self.assertEqual(msg2.optional_string, u'café')
+
+  def testParseDoubleToFloat(self, message_module):
+    message = message_module.TestAllTypes()
+    text = ('repeated_float: 3.4028235e+39\n'
+            'repeated_float: 1.4028235e-39\n')
+    text_format.Parse(text, message)
+    self.assertEqual(message.repeated_float[0], float('inf'))
+    self.assertAlmostEqual(message.repeated_float[1], 1.4028235e-39)
+
+  def testParseExotic(self, message_module):
+    message = message_module.TestAllTypes()
+    text = ('repeated_int64: -9223372036854775808\n'
+            'repeated_uint64: 18446744073709551615\n'
+            'repeated_double: 123.456\n'
+            'repeated_double: 1.23e+22\n'
+            'repeated_double: 1.23e-18\n'
+            'repeated_string: \n'
+            '"\\000\\001\\007\\010\\014\\n\\r\\t\\013\\\\\\\'\\""\n'
+            'repeated_string: "foo" \'corge\' "grault"\n'
+            'repeated_string: "\\303\\274\\352\\234\\237"\n'
+            'repeated_string: "\\xc3\\xbc"\n'
+            'repeated_string: "\xc3\xbc"\n')
+    text_format.Parse(text, message)
+
+    self.assertEqual(-9223372036854775808, message.repeated_int64[0])
+    self.assertEqual(18446744073709551615, message.repeated_uint64[0])
+    self.assertEqual(123.456, message.repeated_double[0])
+    self.assertEqual(1.23e22, message.repeated_double[1])
+    self.assertEqual(1.23e-18, message.repeated_double[2])
+    self.assertEqual('\000\001\a\b\f\n\r\t\v\\\'"', message.repeated_string[0])
+    self.assertEqual('foocorgegrault', message.repeated_string[1])
+    self.assertEqual(u'\u00fc\ua71f', message.repeated_string[2])
+    self.assertEqual(u'\u00fc', message.repeated_string[3])
+
+  def testParseTrailingCommas(self, message_module):
+    message = message_module.TestAllTypes()
+    text = ('repeated_int64: 100;\n'
+            'repeated_int64: 200;\n'
+            'repeated_int64: 300,\n'
+            'repeated_string: "one",\n'
+            'repeated_string: "two";\n')
+    text_format.Parse(text, message)
+
+    self.assertEqual(100, message.repeated_int64[0])
+    self.assertEqual(200, message.repeated_int64[1])
+    self.assertEqual(300, message.repeated_int64[2])
+    self.assertEqual(u'one', message.repeated_string[0])
+    self.assertEqual(u'two', message.repeated_string[1])
+
+  def testParseRepeatedScalarShortFormat(self, message_module):
+    message = message_module.TestAllTypes()
+    text = ('repeated_int64: [100, 200];\n'
+            'repeated_int64: []\n'
+            'repeated_int64: 300,\n'
+            'repeated_string: ["one", "two"];\n')
+    text_format.Parse(text, message)
+
+    self.assertEqual(100, message.repeated_int64[0])
+    self.assertEqual(200, message.repeated_int64[1])
+    self.assertEqual(300, message.repeated_int64[2])
+    self.assertEqual(u'one', message.repeated_string[0])
+    self.assertEqual(u'two', message.repeated_string[1])
+
+  def testParseRepeatedMessageShortFormat(self, message_module):
+    message = message_module.TestAllTypes()
+    text = ('repeated_nested_message: [{bb: 100}, {bb: 200}],\n'
+            'repeated_nested_message: {bb: 300}\n'
+            'repeated_nested_message [{bb: 400}];\n')
+    text_format.Parse(text, message)
+
+    self.assertEqual(100, message.repeated_nested_message[0].bb)
+    self.assertEqual(200, message.repeated_nested_message[1].bb)
+    self.assertEqual(300, message.repeated_nested_message[2].bb)
+    self.assertEqual(400, message.repeated_nested_message[3].bb)
+
+  def testParseEmptyText(self, message_module):
+    message = message_module.TestAllTypes()
+    text = ''
+    text_format.Parse(text, message)
+    self.assertEqual(message_module.TestAllTypes(), message)
+
+  def testParseInvalidUtf8(self, message_module):
+    message = message_module.TestAllTypes()
+    text = 'repeated_string: "\\xc3\\xc3"'
+    with self.assertRaises(text_format.ParseError) as e:
+      text_format.Parse(text, message)
+    self.assertEqual(e.exception.GetLine(), 1)
+    self.assertEqual(e.exception.GetColumn(), 28)
+
+  def testParseSingleWord(self, message_module):
+    message = message_module.TestAllTypes()
+    text = 'foo'
+    six.assertRaisesRegex(self, text_format.ParseError, (
+        r'1:1 : Message type "\w+.TestAllTypes" has no field named '
+        r'"foo".'), text_format.Parse, text, message)
+
+  def testParseUnknownField(self, message_module):
+    message = message_module.TestAllTypes()
+    text = 'unknown_field: 8\n'
+    six.assertRaisesRegex(self, text_format.ParseError, (
+        r'1:1 : Message type "\w+.TestAllTypes" has no field named '
+        r'"unknown_field".'), text_format.Parse, text, message)
+    text = ('optional_int32: 123\n'
+            'unknown_field: 8\n'
+            'optional_nested_message { bb: 45 }')
+    text_format.Parse(text, message, allow_unknown_field=True)
+    self.assertEqual(message.optional_nested_message.bb, 45)
+    self.assertEqual(message.optional_int32, 123)
+
+  def testParseBadEnumValue(self, message_module):
+    message = message_module.TestAllTypes()
+    text = 'optional_nested_enum: BARR'
+    six.assertRaisesRegex(self, text_format.ParseError,
+                          (r'1:23 : \'optional_nested_enum: BARR\': '
+                           r'Enum type "\w+.TestAllTypes.NestedEnum" '
+                           r'has no value named BARR.'), text_format.Parse,
+                          text, message)
+
+  def testParseBadIntValue(self, message_module):
+    message = message_module.TestAllTypes()
+    text = 'optional_int32: bork'
+    six.assertRaisesRegex(self, text_format.ParseError,
+                          ('1:17 : \'optional_int32: bork\': '
+                           'Couldn\'t parse integer: bork'),
+                          text_format.Parse, text, message)
+
+  def testParseStringFieldUnescape(self, message_module):
+    message = message_module.TestAllTypes()
+    text = r'''repeated_string: "\xf\x62"
+               repeated_string: "\\xf\\x62"
+               repeated_string: "\\\xf\\\x62"
+               repeated_string: "\\\\xf\\\\x62"
+               repeated_string: "\\\\\xf\\\\\x62"
+               repeated_string: "\x5cx20"'''
+
+    text_format.Parse(text, message)
+
+    SLASH = '\\'
+    self.assertEqual('\x0fb', message.repeated_string[0])
+    self.assertEqual(SLASH + 'xf' + SLASH + 'x62', message.repeated_string[1])
+    self.assertEqual(SLASH + '\x0f' + SLASH + 'b', message.repeated_string[2])
+    self.assertEqual(SLASH + SLASH + 'xf' + SLASH + SLASH + 'x62',
+                     message.repeated_string[3])
+    self.assertEqual(SLASH + SLASH + '\x0f' + SLASH + SLASH + 'b',
+                     message.repeated_string[4])
+    self.assertEqual(SLASH + 'x20', message.repeated_string[5])
+
+  def testParseOneof(self, message_module):
+    m = message_module.TestAllTypes()
+    m.oneof_uint32 = 11
+    m2 = message_module.TestAllTypes()
+    text_format.Parse(text_format.MessageToString(m), m2)
+    self.assertEqual('oneof_uint32', m2.WhichOneof('oneof_field'))
+
+  def testParseMultipleOneof(self, message_module):
+    m_string = '\n'.join(['oneof_uint32: 11', 'oneof_string: "foo"'])
+    m2 = message_module.TestAllTypes()
+    with six.assertRaisesRegex(self, text_format.ParseError,
+                               ' is specified along with field '):
+      text_format.Parse(m_string, m2)
+
+  # This example contains non-ASCII codepoint unicode data as literals
+  # which should come through as utf-8 for bytes, and as the unicode
+  # itself for string fields.  It also demonstrates escaped binary data.
+  # The ur"" string prefix is unfortunately missing from Python 3
+  # so we resort to double escaping our \s so that they come through.
+  _UNICODE_SAMPLE = u"""
+      optional_bytes: 'Á short desçription'
+      optional_string: 'Á short desçription'
+      repeated_bytes: '\\303\\201 short des\\303\\247ription'
+      repeated_bytes: '\\x12\\x34\\x56\\x78\\x90\\xab\\xcd\\xef'
+      repeated_string: '\\xd0\\x9f\\xd1\\x80\\xd0\\xb8\\xd0\\xb2\\xd0\\xb5\\xd1\\x82'
+      """
+  _BYTES_SAMPLE = _UNICODE_SAMPLE.encode('utf-8')
+  _GOLDEN_UNICODE = u'Á short desçription'
+  _GOLDEN_BYTES = _GOLDEN_UNICODE.encode('utf-8')
+  _GOLDEN_BYTES_1 = b'\x12\x34\x56\x78\x90\xab\xcd\xef'
+  _GOLDEN_STR_0 = u'Привет'
+
+  def testParseUnicode(self, message_module):
+    m = message_module.TestAllTypes()
+    text_format.Parse(self._UNICODE_SAMPLE, m)
+    self.assertEqual(m.optional_bytes, self._GOLDEN_BYTES)
+    self.assertEqual(m.optional_string, self._GOLDEN_UNICODE)
+    self.assertEqual(m.repeated_bytes[0], self._GOLDEN_BYTES)
+    # repeated_bytes[1] contained simple \ escaped non-UTF-8 raw binary data.
+    self.assertEqual(m.repeated_bytes[1], self._GOLDEN_BYTES_1)
+    # repeated_string[0] contained \ escaped data representing the UTF-8
+    # representation of _GOLDEN_STR_0 - it needs to decode as such.
+    self.assertEqual(m.repeated_string[0], self._GOLDEN_STR_0)
+
+  def testParseBytes(self, message_module):
+    m = message_module.TestAllTypes()
+    text_format.Parse(self._BYTES_SAMPLE, m)
+    self.assertEqual(m.optional_bytes, self._GOLDEN_BYTES)
+    self.assertEqual(m.optional_string, self._GOLDEN_UNICODE)
+    self.assertEqual(m.repeated_bytes[0], self._GOLDEN_BYTES)
+    # repeated_bytes[1] contained simple \ escaped non-UTF-8 raw binary data.
+    self.assertEqual(m.repeated_bytes[1], self._GOLDEN_BYTES_1)
+    # repeated_string[0] contained \ escaped data representing the UTF-8
+    # representation of _GOLDEN_STR_0 - it needs to decode as such.
+    self.assertEqual(m.repeated_string[0], self._GOLDEN_STR_0)
+
+  def testFromBytesFile(self, message_module):
+    m = message_module.TestAllTypes()
+    f = io.BytesIO(self._BYTES_SAMPLE)
+    text_format.ParseLines(f, m)
+    self.assertEqual(m.optional_bytes, self._GOLDEN_BYTES)
+    self.assertEqual(m.optional_string, self._GOLDEN_UNICODE)
+    self.assertEqual(m.repeated_bytes[0], self._GOLDEN_BYTES)
+
+  def testFromUnicodeFile(self, message_module):
+    m = message_module.TestAllTypes()
+    f = io.StringIO(self._UNICODE_SAMPLE)
+    text_format.ParseLines(f, m)
+    self.assertEqual(m.optional_bytes, self._GOLDEN_BYTES)
+    self.assertEqual(m.optional_string, self._GOLDEN_UNICODE)
+    self.assertEqual(m.repeated_bytes[0], self._GOLDEN_BYTES)
+
+  def testFromBytesLines(self, message_module):
+    m = message_module.TestAllTypes()
+    text_format.ParseLines(self._BYTES_SAMPLE.split(b'\n'), m)
+    self.assertEqual(m.optional_bytes, self._GOLDEN_BYTES)
+    self.assertEqual(m.optional_string, self._GOLDEN_UNICODE)
+    self.assertEqual(m.repeated_bytes[0], self._GOLDEN_BYTES)
+
+  def testFromUnicodeLines(self, message_module):
+    m = message_module.TestAllTypes()
+    text_format.ParseLines(self._UNICODE_SAMPLE.split(u'\n'), m)
+    self.assertEqual(m.optional_bytes, self._GOLDEN_BYTES)
+    self.assertEqual(m.optional_string, self._GOLDEN_UNICODE)
+    self.assertEqual(m.repeated_bytes[0], self._GOLDEN_BYTES)
+
+  def testParseDuplicateMessages(self, message_module):
+    message = message_module.TestAllTypes()
+    text = ('optional_nested_message { bb: 1 } '
+            'optional_nested_message { bb: 2 }')
+    six.assertRaisesRegex(self, text_format.ParseError, (
+        r'1:59 : Message type "\w+.TestAllTypes" '
+        r'should not have multiple "optional_nested_message" fields.'),
+                          text_format.Parse, text,
+                          message)
+
+  def testParseDuplicateScalars(self, message_module):
+    message = message_module.TestAllTypes()
+    text = ('optional_int32: 42 ' 'optional_int32: 67')
+    six.assertRaisesRegex(self, text_format.ParseError, (
+        r'1:36 : Message type "\w+.TestAllTypes" should not '
+        r'have multiple "optional_int32" fields.'), text_format.Parse, text,
+                          message)
+
+  def testParseExistingScalarInMessage(self, message_module):
+    message = message_module.TestAllTypes(optional_int32=42)
+    text = 'optional_int32: 67'
+    six.assertRaisesRegex(self, text_format.ParseError,
+                          (r'Message type "\w+.TestAllTypes" should not '
+                           r'have multiple "optional_int32" fields.'),
+                          text_format.Parse, text, message)
+
+
+@_parameterized.parameters(unittest_pb2, unittest_proto3_arena_pb2)
+class TextFormatMergeTests(TextFormatBase):
+
+  def testMergeDuplicateScalarsInText(self, message_module):
+    message = message_module.TestAllTypes()
+    text = ('optional_int32: 42 ' 'optional_int32: 67')
+    r = text_format.Merge(text, message)
+    self.assertIs(r, message)
+    self.assertEqual(67, message.optional_int32)
+
+  def testMergeDuplicateNestedMessageScalars(self, message_module):
+    message = message_module.TestAllTypes()
+    text = ('optional_nested_message { bb: 1 } '
+            'optional_nested_message { bb: 2 }')
+    r = text_format.Merge(text, message)
+    self.assertTrue(r is message)
+    self.assertEqual(2, message.optional_nested_message.bb)
+
+  def testReplaceScalarInMessage(self, message_module):
+    message = message_module.TestAllTypes(optional_int32=42)
+    text = 'optional_int32: 67'
+    r = text_format.Merge(text, message)
+    self.assertIs(r, message)
+    self.assertEqual(67, message.optional_int32)
+
+  def testReplaceMessageInMessage(self, message_module):
+    message = message_module.TestAllTypes(
+        optional_int32=42, optional_nested_message=dict())
+    self.assertTrue(message.HasField('optional_nested_message'))
+    text = 'optional_nested_message{ bb: 3 }'
+    r = text_format.Merge(text, message)
+    self.assertIs(r, message)
+    self.assertEqual(3, message.optional_nested_message.bb)
+
+  def testMergeMultipleOneof(self, message_module):
+    m_string = '\n'.join(['oneof_uint32: 11', 'oneof_string: "foo"'])
+    m2 = message_module.TestAllTypes()
+    text_format.Merge(m_string, m2)
+    self.assertEqual('oneof_string', m2.WhichOneof('oneof_field'))
+
+
+# These are tests that aren't fundamentally specific to proto2, but are at
+# the moment because of differences between the proto2 and proto3 test schemas.
+# Ideally the schemas would be made more similar so these tests could pass.
+class OnlyWorksWithProto2RightNowTests(TextFormatBase):
+
+  def testPrintAllFieldsPointy(self):
+    message = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(message)
+    self.CompareToGoldenFile(
+        self.RemoveRedundantZeros(text_format.MessageToString(
+            message, pointy_brackets=True)),
+        'text_format_unittest_data_pointy_oneof.txt')
+
+  def testParseGolden(self):
+    golden_text = '\n'.join(self.ReadGolden(
+        'text_format_unittest_data_oneof_implemented.txt'))
+    parsed_message = unittest_pb2.TestAllTypes()
+    r = text_format.Parse(golden_text, parsed_message)
+    self.assertIs(r, parsed_message)
+
+    message = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(message)
+    self.assertEqual(message, parsed_message)
+
+  def testPrintAllFields(self):
+    message = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(message)
+    self.CompareToGoldenFile(
+        self.RemoveRedundantZeros(text_format.MessageToString(message)),
+        'text_format_unittest_data_oneof_implemented.txt')
+
+  def testPrintUnknownFields(self):
+    message = unittest_pb2.TestAllTypes()
+    message.optional_int32 = 101
+    message.optional_double = 102.0
+    message.optional_string = u'hello'
+    message.optional_bytes = b'103'
+    message.optionalgroup.a = 104
+    message.optional_nested_message.bb = 105
+    all_data = message.SerializeToString()
+    empty_message = unittest_pb2.TestEmptyMessage()
+    empty_message.ParseFromString(all_data)
+    self.assertEqual('  1: 101\n'
+                     '  12: 4636878028842991616\n'
+                     '  14: "hello"\n'
+                     '  15: "103"\n'
+                     '  16 {\n'
+                     '    17: 104\n'
+                     '  }\n'
+                     '  18 {\n'
+                     '    1: 105\n'
+                     '  }\n',
+                     text_format.MessageToString(empty_message,
+                                                 indent=2,
+                                                 print_unknown_fields=True))
+    self.assertEqual('1: 101 '
+                     '12: 4636878028842991616 '
+                     '14: "hello" '
+                     '15: "103" '
+                     '16 { 17: 104 } '
+                     '18 { 1: 105 }',
+                     text_format.MessageToString(empty_message,
+                                                 print_unknown_fields=True,
+                                                 as_one_line=True))
+
+  def testPrintInIndexOrder(self):
+    message = unittest_pb2.TestFieldOrderings()
+    # Fields are listed in index order instead of field number.
+    message.my_string = 'str'
+    message.my_int = 101
+    message.my_float = 111
+    message.optional_nested_message.oo = 0
+    message.optional_nested_message.bb = 1
+    message.Extensions[unittest_pb2.my_extension_string] = 'ext_str0'
+    # Extensions are listed based on the order of extension number.
+    # Extension number 12.
+    message.Extensions[unittest_pb2.TestExtensionOrderings2.
+                       test_ext_orderings2].my_string = 'ext_str2'
+    # Extension number 13.
+    message.Extensions[unittest_pb2.TestExtensionOrderings1.
+                       test_ext_orderings1].my_string = 'ext_str1'
+    # Extension number 14.
+    message.Extensions[
+        unittest_pb2.TestExtensionOrderings2.TestExtensionOrderings3.
+        test_ext_orderings3].my_string = 'ext_str3'
+
+    # Print in index order.
+    self.CompareToGoldenText(
+        self.RemoveRedundantZeros(
+            text_format.MessageToString(message, use_index_order=True)),
+        'my_string: "str"\n'
+        'my_int: 101\n'
+        'my_float: 111\n'
+        'optional_nested_message {\n'
+        '  oo: 0\n'
+        '  bb: 1\n'
+        '}\n'
+        '[protobuf_unittest.TestExtensionOrderings2.test_ext_orderings2] {\n'
+        '  my_string: "ext_str2"\n'
+        '}\n'
+        '[protobuf_unittest.TestExtensionOrderings1.test_ext_orderings1] {\n'
+        '  my_string: "ext_str1"\n'
+        '}\n'
+        '[protobuf_unittest.TestExtensionOrderings2.TestExtensionOrderings3'
+        '.test_ext_orderings3] {\n'
+        '  my_string: "ext_str3"\n'
+        '}\n'
+        '[protobuf_unittest.my_extension_string]: "ext_str0"\n')
+    # By default, print in field number order.
+    self.CompareToGoldenText(
+        self.RemoveRedundantZeros(text_format.MessageToString(message)),
+        'my_int: 101\n'
+        'my_string: "str"\n'
+        '[protobuf_unittest.TestExtensionOrderings2.test_ext_orderings2] {\n'
+        '  my_string: "ext_str2"\n'
+        '}\n'
+        '[protobuf_unittest.TestExtensionOrderings1.test_ext_orderings1] {\n'
+        '  my_string: "ext_str1"\n'
+        '}\n'
+        '[protobuf_unittest.TestExtensionOrderings2.TestExtensionOrderings3'
+        '.test_ext_orderings3] {\n'
+        '  my_string: "ext_str3"\n'
+        '}\n'
+        '[protobuf_unittest.my_extension_string]: "ext_str0"\n'
+        'my_float: 111\n'
+        'optional_nested_message {\n'
+        '  bb: 1\n'
+        '  oo: 0\n'
+        '}\n')
+
+  def testMergeLinesGolden(self):
+    opened = self.ReadGolden('text_format_unittest_data_oneof_implemented.txt')
+    parsed_message = unittest_pb2.TestAllTypes()
+    r = text_format.MergeLines(opened, parsed_message)
+    self.assertIs(r, parsed_message)
+
+    message = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(message)
+    self.assertEqual(message, parsed_message)
+
+  def testParseLinesGolden(self):
+    opened = self.ReadGolden('text_format_unittest_data_oneof_implemented.txt')
+    parsed_message = unittest_pb2.TestAllTypes()
+    r = text_format.ParseLines(opened, parsed_message)
+    self.assertIs(r, parsed_message)
+
+    message = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(message)
+    self.assertEqual(message, parsed_message)
+
+  def testPrintMap(self):
+    message = map_unittest_pb2.TestMap()
+
+    message.map_int32_int32[-123] = -456
+    message.map_int64_int64[-2**33] = -2**34
+    message.map_uint32_uint32[123] = 456
+    message.map_uint64_uint64[2**33] = 2**34
+    message.map_string_string['abc'] = '123'
+    message.map_int32_foreign_message[111].c = 5
+
+    # Maps are serialized to text format using their underlying repeated
+    # representation.
+    self.CompareToGoldenText(
+        text_format.MessageToString(message), 'map_int32_int32 {\n'
+        '  key: -123\n'
+        '  value: -456\n'
+        '}\n'
+        'map_int64_int64 {\n'
+        '  key: -8589934592\n'
+        '  value: -17179869184\n'
+        '}\n'
+        'map_uint32_uint32 {\n'
+        '  key: 123\n'
+        '  value: 456\n'
+        '}\n'
+        'map_uint64_uint64 {\n'
+        '  key: 8589934592\n'
+        '  value: 17179869184\n'
+        '}\n'
+        'map_string_string {\n'
+        '  key: "abc"\n'
+        '  value: "123"\n'
+        '}\n'
+        'map_int32_foreign_message {\n'
+        '  key: 111\n'
+        '  value {\n'
+        '    c: 5\n'
+        '  }\n'
+        '}\n')
+
+  # In cpp implementation, __str__ calls the cpp implementation of text format.
+  def testPrintMapUsingCppImplementation(self):
+    message = map_unittest_pb2.TestMap()
+    inner_msg = message.map_int32_foreign_message[111]
+    inner_msg.c = 1
+    self.assertEqual(
+        str(message),
+        'map_int32_foreign_message {\n'
+        '  key: 111\n'
+        '  value {\n'
+        '    c: 1\n'
+        '  }\n'
+        '}\n')
+    inner_msg.c = 2
+    self.assertEqual(
+        str(message),
+        'map_int32_foreign_message {\n'
+        '  key: 111\n'
+        '  value {\n'
+        '    c: 2\n'
+        '  }\n'
+        '}\n')
+
+  def testMapOrderEnforcement(self):
+    message = map_unittest_pb2.TestMap()
+    for letter in string.ascii_uppercase[13:26]:
+      message.map_string_string[letter] = 'dummy'
+    for letter in reversed(string.ascii_uppercase[0:13]):
+      message.map_string_string[letter] = 'dummy'
+    golden = ''.join(('map_string_string {\n  key: "%c"\n  value: "dummy"\n}\n'
+                      % (letter,) for letter in string.ascii_uppercase))
+    self.CompareToGoldenText(text_format.MessageToString(message), golden)
+
+  # TODO(teboring): In c/137553523, not serializing default value for map entry
+  # message has been fixed. This test needs to be disabled in order to submit
+  # that cl. Add this back when c/137553523 has been submitted.
+  # def testMapOrderSemantics(self):
+  #   golden_lines = self.ReadGolden('map_test_data.txt')
+
+  #   message = map_unittest_pb2.TestMap()
+  #   text_format.ParseLines(golden_lines, message)
+  #   candidate = text_format.MessageToString(message)
+  #   # The Python implementation emits "1.0" for the double value that the C++
+  #   # implementation emits as "1".
+  #   candidate = candidate.replace('1.0', '1', 2)
+  #   candidate = candidate.replace('0.0', '0', 2)
+  #   self.assertMultiLineEqual(candidate, ''.join(golden_lines))
+
+
+# Tests of proto2-only features (MessageSet, extensions, etc.).
+class Proto2Tests(TextFormatBase):
+
+  def testPrintMessageSet(self):
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    ext1 = unittest_mset_pb2.TestMessageSetExtension1.message_set_extension
+    ext2 = unittest_mset_pb2.TestMessageSetExtension2.message_set_extension
+    message.message_set.Extensions[ext1].i = 23
+    message.message_set.Extensions[ext2].str = 'foo'
+    self.CompareToGoldenText(
+        text_format.MessageToString(message), 'message_set {\n'
+        '  [protobuf_unittest.TestMessageSetExtension1] {\n'
+        '    i: 23\n'
+        '  }\n'
+        '  [protobuf_unittest.TestMessageSetExtension2] {\n'
+        '    str: \"foo\"\n'
+        '  }\n'
+        '}\n')
+
+    message = message_set_extensions_pb2.TestMessageSet()
+    ext = message_set_extensions_pb2.message_set_extension3
+    message.Extensions[ext].text = 'bar'
+    self.CompareToGoldenText(
+        text_format.MessageToString(message),
+        '[google.protobuf.internal.TestMessageSetExtension3] {\n'
+        '  text: \"bar\"\n'
+        '}\n')
+
+  def testPrintMessageSetByFieldNumber(self):
+    out = text_format.TextWriter(False)
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    ext1 = unittest_mset_pb2.TestMessageSetExtension1.message_set_extension
+    ext2 = unittest_mset_pb2.TestMessageSetExtension2.message_set_extension
+    message.message_set.Extensions[ext1].i = 23
+    message.message_set.Extensions[ext2].str = 'foo'
+    text_format.PrintMessage(message, out, use_field_number=True)
+    self.CompareToGoldenText(out.getvalue(), '1 {\n'
+                             '  1545008 {\n'
+                             '    15: 23\n'
+                             '  }\n'
+                             '  1547769 {\n'
+                             '    25: \"foo\"\n'
+                             '  }\n'
+                             '}\n')
+    out.close()
+
+  def testPrintMessageSetAsOneLine(self):
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    ext1 = unittest_mset_pb2.TestMessageSetExtension1.message_set_extension
+    ext2 = unittest_mset_pb2.TestMessageSetExtension2.message_set_extension
+    message.message_set.Extensions[ext1].i = 23
+    message.message_set.Extensions[ext2].str = 'foo'
+    self.CompareToGoldenText(
+        text_format.MessageToString(message, as_one_line=True),
+        'message_set {'
+        ' [protobuf_unittest.TestMessageSetExtension1] {'
+        ' i: 23'
+        ' }'
+        ' [protobuf_unittest.TestMessageSetExtension2] {'
+        ' str: \"foo\"'
+        ' }'
+        ' }')
+
+  def testParseMessageSet(self):
+    message = unittest_pb2.TestAllTypes()
+    text = ('repeated_uint64: 1\n' 'repeated_uint64: 2\n')
+    text_format.Parse(text, message)
+    self.assertEqual(1, message.repeated_uint64[0])
+    self.assertEqual(2, message.repeated_uint64[1])
+
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    text = ('message_set {\n'
+            '  [protobuf_unittest.TestMessageSetExtension1] {\n'
+            '    i: 23\n'
+            '  }\n'
+            '  [protobuf_unittest.TestMessageSetExtension2] {\n'
+            '    str: \"foo\"\n'
+            '  }\n'
+            '}\n')
+    text_format.Parse(text, message)
+    ext1 = unittest_mset_pb2.TestMessageSetExtension1.message_set_extension
+    ext2 = unittest_mset_pb2.TestMessageSetExtension2.message_set_extension
+    self.assertEqual(23, message.message_set.Extensions[ext1].i)
+    self.assertEqual('foo', message.message_set.Extensions[ext2].str)
+
+  def testExtensionInsideAnyMessage(self):
+    message = test_extend_any.TestAny()
+    text = ('value {\n'
+            '  [type.googleapis.com/google.protobuf.internal.TestAny] {\n'
+            '    [google.protobuf.internal.TestAnyExtension1.extension1] {\n'
+            '      i: 10\n'
+            '    }\n'
+            '  }\n'
+            '}\n')
+    text_format.Merge(text, message, descriptor_pool=descriptor_pool.Default())
+    self.CompareToGoldenText(
+        text_format.MessageToString(
+            message, descriptor_pool=descriptor_pool.Default()),
+        text)
+
+  def testParseMessageByFieldNumber(self):
+    message = unittest_pb2.TestAllTypes()
+    text = ('34: 1\n' 'repeated_uint64: 2\n')
+    text_format.Parse(text, message, allow_field_number=True)
+    self.assertEqual(1, message.repeated_uint64[0])
+    self.assertEqual(2, message.repeated_uint64[1])
+
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    text = ('1 {\n'
+            '  1545008 {\n'
+            '    15: 23\n'
+            '  }\n'
+            '  1547769 {\n'
+            '    25: \"foo\"\n'
+            '  }\n'
+            '}\n')
+    text_format.Parse(text, message, allow_field_number=True)
+    ext1 = unittest_mset_pb2.TestMessageSetExtension1.message_set_extension
+    ext2 = unittest_mset_pb2.TestMessageSetExtension2.message_set_extension
+    self.assertEqual(23, message.message_set.Extensions[ext1].i)
+    self.assertEqual('foo', message.message_set.Extensions[ext2].str)
+
+    # Can't parse field number without set allow_field_number=True.
+    message = unittest_pb2.TestAllTypes()
+    text = '34:1\n'
+    six.assertRaisesRegex(self, text_format.ParseError, (
+        r'1:1 : Message type "\w+.TestAllTypes" has no field named '
+        r'"34".'), text_format.Parse, text, message)
+
+    # Can't parse if field number is not found.
+    text = '1234:1\n'
+    six.assertRaisesRegex(
+        self,
+        text_format.ParseError,
+        (r'1:1 : Message type "\w+.TestAllTypes" has no field named '
+         r'"1234".'),
+        text_format.Parse,
+        text,
+        message,
+        allow_field_number=True)
+
+  def testPrintAllExtensions(self):
+    message = unittest_pb2.TestAllExtensions()
+    test_util.SetAllExtensions(message)
+    self.CompareToGoldenFile(
+        self.RemoveRedundantZeros(text_format.MessageToString(message)),
+        'text_format_unittest_extensions_data.txt')
+
+  def testPrintAllExtensionsPointy(self):
+    message = unittest_pb2.TestAllExtensions()
+    test_util.SetAllExtensions(message)
+    self.CompareToGoldenFile(
+        self.RemoveRedundantZeros(text_format.MessageToString(
+            message, pointy_brackets=True)),
+        'text_format_unittest_extensions_data_pointy.txt')
+
+  def testParseGoldenExtensions(self):
+    golden_text = '\n'.join(self.ReadGolden(
+        'text_format_unittest_extensions_data.txt'))
+    parsed_message = unittest_pb2.TestAllExtensions()
+    text_format.Parse(golden_text, parsed_message)
+
+    message = unittest_pb2.TestAllExtensions()
+    test_util.SetAllExtensions(message)
+    self.assertEqual(message, parsed_message)
+
+  def testParseAllExtensions(self):
+    message = unittest_pb2.TestAllExtensions()
+    test_util.SetAllExtensions(message)
+    ascii_text = text_format.MessageToString(message)
+
+    parsed_message = unittest_pb2.TestAllExtensions()
+    text_format.Parse(ascii_text, parsed_message)
+    self.assertEqual(message, parsed_message)
+
+  def testParseAllowedUnknownExtension(self):
+    # Skip over unknown extension correctly.
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    text = ('message_set {\n'
+            '  [unknown_extension] {\n'
+            '    i: 23\n'
+            '    bin: "\xe0"'
+            '    [nested_unknown_ext]: {\n'
+            '      i: 23\n'
+            '      x: x\n'
+            '      test: "test_string"\n'
+            '      floaty_float: -0.315\n'
+            '      num: -inf\n'
+            '      multiline_str: "abc"\n'
+            '          "def"\n'
+            '          "xyz."\n'
+            '      [nested_unknown_ext.ext]: <\n'
+            '        i: 23\n'
+            '        i: 24\n'
+            '        pointfloat: .3\n'
+            '        test: "test_string"\n'
+            '        floaty_float: -0.315\n'
+            '        num: -inf\n'
+            '        long_string: "test" "test2" \n'
+            '      >\n'
+            '    }\n'
+            '  }\n'
+            '  [unknown_extension]: 5\n'
+            '  [unknown_extension_with_number_field] {\n'
+            '    1: "some_field"\n'
+            '    2: -0.451\n'
+            '  }\n'
+            '}\n')
+    text_format.Parse(text, message, allow_unknown_extension=True)
+    golden = 'message_set {\n}\n'
+    self.CompareToGoldenText(text_format.MessageToString(message), golden)
+
+    # Catch parse errors in unknown extension.
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    malformed = ('message_set {\n'
+                 '  [unknown_extension] {\n'
+                 '    i:\n'  # Missing value.
+                 '  }\n'
+                 '}\n')
+    six.assertRaisesRegex(self,
+                          text_format.ParseError,
+                          'Invalid field value: }',
+                          text_format.Parse,
+                          malformed,
+                          message,
+                          allow_unknown_extension=True)
+
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    malformed = ('message_set {\n'
+                 '  [unknown_extension] {\n'
+                 '    str: "malformed string\n'  # Missing closing quote.
+                 '  }\n'
+                 '}\n')
+    six.assertRaisesRegex(self,
+                          text_format.ParseError,
+                          'Invalid field value: "',
+                          text_format.Parse,
+                          malformed,
+                          message,
+                          allow_unknown_extension=True)
+
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    malformed = ('message_set {\n'
+                 '  [unknown_extension] {\n'
+                 '    str: "malformed\n multiline\n string\n'
+                 '  }\n'
+                 '}\n')
+    six.assertRaisesRegex(self,
+                          text_format.ParseError,
+                          'Invalid field value: "',
+                          text_format.Parse,
+                          malformed,
+                          message,
+                          allow_unknown_extension=True)
+
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    malformed = ('message_set {\n'
+                 '  [malformed_extension] <\n'
+                 '    i: -5\n'
+                 '  \n'  # Missing '>' here.
+                 '}\n')
+    six.assertRaisesRegex(self,
+                          text_format.ParseError,
+                          '5:1 : \'}\': Expected ">".',
+                          text_format.Parse,
+                          malformed,
+                          message,
+                          allow_unknown_extension=True)
+
+    # Don't allow unknown fields with allow_unknown_extension=True.
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    malformed = ('message_set {\n'
+                 '  unknown_field: true\n'
+                 '}\n')
+    six.assertRaisesRegex(self,
+                          text_format.ParseError,
+                          ('2:3 : Message type '
+                           '"proto2_wireformat_unittest.TestMessageSet" has no'
+                           ' field named "unknown_field".'),
+                          text_format.Parse,
+                          malformed,
+                          message,
+                          allow_unknown_extension=True)
+
+    # Parse known extension correctly.
+    message = unittest_mset_pb2.TestMessageSetContainer()
+    text = ('message_set {\n'
+            '  [protobuf_unittest.TestMessageSetExtension1] {\n'
+            '    i: 23\n'
+            '  }\n'
+            '  [protobuf_unittest.TestMessageSetExtension2] {\n'
+            '    str: \"foo\"\n'
+            '  }\n'
+            '}\n')
+    text_format.Parse(text, message, allow_unknown_extension=True)
+    ext1 = unittest_mset_pb2.TestMessageSetExtension1.message_set_extension
+    ext2 = unittest_mset_pb2.TestMessageSetExtension2.message_set_extension
+    self.assertEqual(23, message.message_set.Extensions[ext1].i)
+    self.assertEqual('foo', message.message_set.Extensions[ext2].str)
+
+  def testParseBadIdentifier(self):
+    message = unittest_pb2.TestAllTypes()
+    text = ('optional_nested_message { "bb": 1 }')
+    with self.assertRaises(text_format.ParseError) as e:
+      text_format.Parse(text, message)
+    self.assertEqual(str(e.exception),
+                     '1:27 : \'optional_nested_message { "bb": 1 }\': '
+                     'Expected identifier or number, got "bb".')
+
+  def testParseBadExtension(self):
+    message = unittest_pb2.TestAllExtensions()
+    text = '[unknown_extension]: 8\n'
+    six.assertRaisesRegex(self, text_format.ParseError,
+                          '1:2 : Extension "unknown_extension" not registered.',
+                          text_format.Parse, text, message)
+    message = unittest_pb2.TestAllTypes()
+    six.assertRaisesRegex(self, text_format.ParseError, (
+        '1:2 : Message type "protobuf_unittest.TestAllTypes" does not have '
+        'extensions.'), text_format.Parse, text, message)
+
+  def testParseNumericUnknownEnum(self):
+    message = unittest_pb2.TestAllTypes()
+    text = 'optional_nested_enum: 100'
+    six.assertRaisesRegex(self, text_format.ParseError,
+                          (r'1:23 : \'optional_nested_enum: 100\': '
+                           r'Enum type "\w+.TestAllTypes.NestedEnum" '
+                           r'has no value with number 100.'), text_format.Parse,
+                          text, message)
+
+  def testMergeDuplicateExtensionScalars(self):
+    message = unittest_pb2.TestAllExtensions()
+    text = ('[protobuf_unittest.optional_int32_extension]: 42 '
+            '[protobuf_unittest.optional_int32_extension]: 67')
+    text_format.Merge(text, message)
+    self.assertEqual(67,
+                     message.Extensions[unittest_pb2.optional_int32_extension])
+
+  def testParseDuplicateExtensionScalars(self):
+    message = unittest_pb2.TestAllExtensions()
+    text = ('[protobuf_unittest.optional_int32_extension]: 42 '
+            '[protobuf_unittest.optional_int32_extension]: 67')
+    six.assertRaisesRegex(self, text_format.ParseError, (
+        '1:96 : Message type "protobuf_unittest.TestAllExtensions" '
+        'should not have multiple '
+        '"protobuf_unittest.optional_int32_extension" extensions.'),
+                          text_format.Parse, text, message)
+
+  def testParseDuplicateExtensionMessages(self):
+    message = unittest_pb2.TestAllExtensions()
+    text = ('[protobuf_unittest.optional_nested_message_extension]: {} '
+            '[protobuf_unittest.optional_nested_message_extension]: {}')
+    six.assertRaisesRegex(self, text_format.ParseError, (
+        '1:114 : Message type "protobuf_unittest.TestAllExtensions" '
+        'should not have multiple '
+        '"protobuf_unittest.optional_nested_message_extension" extensions.'),
+                          text_format.Parse, text, message)
+
+  def testParseGroupNotClosed(self):
+    message = unittest_pb2.TestAllTypes()
+    text = 'RepeatedGroup: <'
+    six.assertRaisesRegex(self, text_format.ParseError, '1:16 : Expected ">".',
+                          text_format.Parse, text, message)
+    text = 'RepeatedGroup: {'
+    six.assertRaisesRegex(self, text_format.ParseError, '1:16 : Expected "}".',
+                          text_format.Parse, text, message)
+
+  def testParseEmptyGroup(self):
+    message = unittest_pb2.TestAllTypes()
+    text = 'OptionalGroup: {}'
+    text_format.Parse(text, message)
+    self.assertTrue(message.HasField('optionalgroup'))
+
+    message.Clear()
+
+    message = unittest_pb2.TestAllTypes()
+    text = 'OptionalGroup: <>'
+    text_format.Parse(text, message)
+    self.assertTrue(message.HasField('optionalgroup'))
+
+  # Maps aren't really proto2-only, but our test schema only has maps for
+  # proto2.
+  def testParseMap(self):
+    text = ('map_int32_int32 {\n'
+            '  key: -123\n'
+            '  value: -456\n'
+            '}\n'
+            'map_int64_int64 {\n'
+            '  key: -8589934592\n'
+            '  value: -17179869184\n'
+            '}\n'
+            'map_uint32_uint32 {\n'
+            '  key: 123\n'
+            '  value: 456\n'
+            '}\n'
+            'map_uint64_uint64 {\n'
+            '  key: 8589934592\n'
+            '  value: 17179869184\n'
+            '}\n'
+            'map_string_string {\n'
+            '  key: "abc"\n'
+            '  value: "123"\n'
+            '}\n'
+            'map_int32_foreign_message {\n'
+            '  key: 111\n'
+            '  value {\n'
+            '    c: 5\n'
+            '  }\n'
+            '}\n')
+    message = map_unittest_pb2.TestMap()
+    text_format.Parse(text, message)
+
+    self.assertEqual(-456, message.map_int32_int32[-123])
+    self.assertEqual(-2**34, message.map_int64_int64[-2**33])
+    self.assertEqual(456, message.map_uint32_uint32[123])
+    self.assertEqual(2**34, message.map_uint64_uint64[2**33])
+    self.assertEqual('123', message.map_string_string['abc'])
+    self.assertEqual(5, message.map_int32_foreign_message[111].c)
+
+
+class Proto3Tests(unittest.TestCase):
+
+  def testPrintMessageExpandAny(self):
+    packed_message = unittest_pb2.OneString()
+    packed_message.data = 'string'
+    message = any_test_pb2.TestAny()
+    message.any_value.Pack(packed_message)
+    self.assertEqual(
+        text_format.MessageToString(message,
+                                    descriptor_pool=descriptor_pool.Default()),
+        'any_value {\n'
+        '  [type.googleapis.com/protobuf_unittest.OneString] {\n'
+        '    data: "string"\n'
+        '  }\n'
+        '}\n')
+
+  def testTopAnyMessage(self):
+    packed_msg = unittest_pb2.OneString()
+    msg = any_pb2.Any()
+    msg.Pack(packed_msg)
+    text = text_format.MessageToString(msg)
+    other_msg = text_format.Parse(text, any_pb2.Any())
+    self.assertEqual(msg, other_msg)
+
+  def testPrintMessageExpandAnyRepeated(self):
+    packed_message = unittest_pb2.OneString()
+    message = any_test_pb2.TestAny()
+    packed_message.data = 'string0'
+    message.repeated_any_value.add().Pack(packed_message)
+    packed_message.data = 'string1'
+    message.repeated_any_value.add().Pack(packed_message)
+    self.assertEqual(
+        text_format.MessageToString(message),
+        'repeated_any_value {\n'
+        '  [type.googleapis.com/protobuf_unittest.OneString] {\n'
+        '    data: "string0"\n'
+        '  }\n'
+        '}\n'
+        'repeated_any_value {\n'
+        '  [type.googleapis.com/protobuf_unittest.OneString] {\n'
+        '    data: "string1"\n'
+        '  }\n'
+        '}\n')
+
+  def testPrintMessageExpandAnyDescriptorPoolMissingType(self):
+    packed_message = unittest_pb2.OneString()
+    packed_message.data = 'string'
+    message = any_test_pb2.TestAny()
+    message.any_value.Pack(packed_message)
+    empty_pool = descriptor_pool.DescriptorPool()
+    self.assertEqual(
+        text_format.MessageToString(message, descriptor_pool=empty_pool),
+        'any_value {\n'
+        '  type_url: "type.googleapis.com/protobuf_unittest.OneString"\n'
+        '  value: "\\n\\006string"\n'
+        '}\n')
+
+  def testPrintMessageExpandAnyPointyBrackets(self):
+    packed_message = unittest_pb2.OneString()
+    packed_message.data = 'string'
+    message = any_test_pb2.TestAny()
+    message.any_value.Pack(packed_message)
+    self.assertEqual(
+        text_format.MessageToString(message,
+                                    pointy_brackets=True),
+        'any_value <\n'
+        '  [type.googleapis.com/protobuf_unittest.OneString] <\n'
+        '    data: "string"\n'
+        '  >\n'
+        '>\n')
+
+  def testPrintMessageExpandAnyAsOneLine(self):
+    packed_message = unittest_pb2.OneString()
+    packed_message.data = 'string'
+    message = any_test_pb2.TestAny()
+    message.any_value.Pack(packed_message)
+    self.assertEqual(
+        text_format.MessageToString(message,
+                                    as_one_line=True),
+        'any_value {'
+        ' [type.googleapis.com/protobuf_unittest.OneString]'
+        ' { data: "string" } '
+        '}')
+
+  def testPrintMessageExpandAnyAsOneLinePointyBrackets(self):
+    packed_message = unittest_pb2.OneString()
+    packed_message.data = 'string'
+    message = any_test_pb2.TestAny()
+    message.any_value.Pack(packed_message)
+    self.assertEqual(
+        text_format.MessageToString(message,
+                                    as_one_line=True,
+                                    pointy_brackets=True,
+                                    descriptor_pool=descriptor_pool.Default()),
+        'any_value <'
+        ' [type.googleapis.com/protobuf_unittest.OneString]'
+        ' < data: "string" > '
+        '>')
+
+  def testPrintAndParseMessageInvalidAny(self):
+    packed_message = unittest_pb2.OneString()
+    packed_message.data = 'string'
+    message = any_test_pb2.TestAny()
+    message.any_value.Pack(packed_message)
+    # Only include string after last '/' in type_url.
+    message.any_value.type_url = message.any_value.TypeName()
+    text = text_format.MessageToString(message)
+    self.assertEqual(
+        text, 'any_value {\n'
+        '  type_url: "protobuf_unittest.OneString"\n'
+        '  value: "\\n\\006string"\n'
+        '}\n')
+
+    parsed_message = any_test_pb2.TestAny()
+    text_format.Parse(text, parsed_message)
+    self.assertEqual(message, parsed_message)
+
+  def testUnknownEnums(self):
+    message = unittest_proto3_arena_pb2.TestAllTypes()
+    message2 = unittest_proto3_arena_pb2.TestAllTypes()
+    message.optional_nested_enum = 999
+    text_string = text_format.MessageToString(message)
+    text_format.Parse(text_string, message2)
+    self.assertEqual(999, message2.optional_nested_enum)
+
+  def testMergeExpandedAny(self):
+    message = any_test_pb2.TestAny()
+    text = ('any_value {\n'
+            '  [type.googleapis.com/protobuf_unittest.OneString] {\n'
+            '    data: "string"\n'
+            '  }\n'
+            '}\n')
+    text_format.Merge(text, message)
+    packed_message = unittest_pb2.OneString()
+    message.any_value.Unpack(packed_message)
+    self.assertEqual('string', packed_message.data)
+    message.Clear()
+    text_format.Parse(text, message)
+    packed_message = unittest_pb2.OneString()
+    message.any_value.Unpack(packed_message)
+    self.assertEqual('string', packed_message.data)
+
+  def testMergeExpandedAnyRepeated(self):
+    message = any_test_pb2.TestAny()
+    text = ('repeated_any_value {\n'
+            '  [type.googleapis.com/protobuf_unittest.OneString] {\n'
+            '    data: "string0"\n'
+            '  }\n'
+            '}\n'
+            'repeated_any_value {\n'
+            '  [type.googleapis.com/protobuf_unittest.OneString] {\n'
+            '    data: "string1"\n'
+            '  }\n'
+            '}\n')
+    text_format.Merge(text, message)
+    packed_message = unittest_pb2.OneString()
+    message.repeated_any_value[0].Unpack(packed_message)
+    self.assertEqual('string0', packed_message.data)
+    message.repeated_any_value[1].Unpack(packed_message)
+    self.assertEqual('string1', packed_message.data)
+
+  def testMergeExpandedAnyPointyBrackets(self):
+    message = any_test_pb2.TestAny()
+    text = ('any_value {\n'
+            '  [type.googleapis.com/protobuf_unittest.OneString] <\n'
+            '    data: "string"\n'
+            '  >\n'
+            '}\n')
+    text_format.Merge(text, message)
+    packed_message = unittest_pb2.OneString()
+    message.any_value.Unpack(packed_message)
+    self.assertEqual('string', packed_message.data)
+
+  def testMergeAlternativeUrl(self):
+    message = any_test_pb2.TestAny()
+    text = ('any_value {\n'
+            '  [type.otherapi.com/protobuf_unittest.OneString] {\n'
+            '    data: "string"\n'
+            '  }\n'
+            '}\n')
+    text_format.Merge(text, message)
+    packed_message = unittest_pb2.OneString()
+    self.assertEqual('type.otherapi.com/protobuf_unittest.OneString',
+                     message.any_value.type_url)
+
+  def testMergeExpandedAnyDescriptorPoolMissingType(self):
+    message = any_test_pb2.TestAny()
+    text = ('any_value {\n'
+            '  [type.googleapis.com/protobuf_unittest.OneString] {\n'
+            '    data: "string"\n'
+            '  }\n'
+            '}\n')
+    with self.assertRaises(text_format.ParseError) as e:
+      empty_pool = descriptor_pool.DescriptorPool()
+      text_format.Merge(text, message, descriptor_pool=empty_pool)
+    self.assertEqual(
+        str(e.exception),
+        'Type protobuf_unittest.OneString not found in descriptor pool')
+
+  def testMergeUnexpandedAny(self):
+    text = ('any_value {\n'
+            '  type_url: "type.googleapis.com/protobuf_unittest.OneString"\n'
+            '  value: "\\n\\006string"\n'
+            '}\n')
+    message = any_test_pb2.TestAny()
+    text_format.Merge(text, message)
+    packed_message = unittest_pb2.OneString()
+    message.any_value.Unpack(packed_message)
+    self.assertEqual('string', packed_message.data)
+
+  def testMergeMissingAnyEndToken(self):
+    message = any_test_pb2.TestAny()
+    text = ('any_value {\n'
+            '  [type.googleapis.com/protobuf_unittest.OneString] {\n'
+            '    data: "string"\n')
+    with self.assertRaises(text_format.ParseError) as e:
+      text_format.Merge(text, message)
+    self.assertEqual(str(e.exception), '3:11 : Expected "}".')
+
+  def testProto3Optional(self):
+    msg = test_proto3_optional_pb2.TestProto3Optional()
+    self.assertEqual(text_format.MessageToString(msg), '')
+    msg.optional_int32 = 0
+    msg.optional_float = 0.0
+    msg.optional_string = ''
+    msg.optional_nested_message.bb = 0
+    text = ('optional_int32: 0\n'
+            'optional_float: 0.0\n'
+            'optional_string: ""\n'
+            'optional_nested_message {\n'
+            '  bb: 0\n'
+            '}\n')
+    self.assertEqual(text_format.MessageToString(msg), text)
+    msg2 = test_proto3_optional_pb2.TestProto3Optional()
+    text_format.Parse(text, msg2)
+    self.assertEqual(text_format.MessageToString(msg2), text)
+
+
+class TokenizerTest(unittest.TestCase):
+
+  def testSimpleTokenCases(self):
+    text = ('identifier1:"string1"\n     \n\n'
+            'identifier2 : \n \n123  \n  identifier3 :\'string\'\n'
+            'identifiER_4 : 1.1e+2 ID5:-0.23 ID6:\'aaaa\\\'bbbb\'\n'
+            'ID7 : "aa\\"bb"\n\n\n\n ID8: {A:inf B:-inf C:true D:false}\n'
+            'ID9: 22 ID10: -111111111111111111 ID11: -22\n'
+            'ID12: 2222222222222222222 ID13: 1.23456f ID14: 1.2e+2f '
+            'false_bool:  0 true_BOOL:t \n true_bool1:  1 false_BOOL1:f '
+            'False_bool: False True_bool: True X:iNf Y:-inF Z:nAN')
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    methods = [(tokenizer.ConsumeIdentifier, 'identifier1'), ':',
+               (tokenizer.ConsumeString, 'string1'),
+               (tokenizer.ConsumeIdentifier, 'identifier2'), ':',
+               (tokenizer.ConsumeInteger, 123),
+               (tokenizer.ConsumeIdentifier, 'identifier3'), ':',
+               (tokenizer.ConsumeString, 'string'),
+               (tokenizer.ConsumeIdentifier, 'identifiER_4'), ':',
+               (tokenizer.ConsumeFloat, 1.1e+2),
+               (tokenizer.ConsumeIdentifier, 'ID5'), ':',
+               (tokenizer.ConsumeFloat, -0.23),
+               (tokenizer.ConsumeIdentifier, 'ID6'), ':',
+               (tokenizer.ConsumeString, 'aaaa\'bbbb'),
+               (tokenizer.ConsumeIdentifier, 'ID7'), ':',
+               (tokenizer.ConsumeString, 'aa\"bb'),
+               (tokenizer.ConsumeIdentifier, 'ID8'), ':', '{',
+               (tokenizer.ConsumeIdentifier, 'A'), ':',
+               (tokenizer.ConsumeFloat, float('inf')),
+               (tokenizer.ConsumeIdentifier, 'B'), ':',
+               (tokenizer.ConsumeFloat, -float('inf')),
+               (tokenizer.ConsumeIdentifier, 'C'), ':',
+               (tokenizer.ConsumeBool, True),
+               (tokenizer.ConsumeIdentifier, 'D'), ':',
+               (tokenizer.ConsumeBool, False), '}',
+               (tokenizer.ConsumeIdentifier, 'ID9'), ':',
+               (tokenizer.ConsumeInteger, 22),
+               (tokenizer.ConsumeIdentifier, 'ID10'), ':',
+               (tokenizer.ConsumeInteger, -111111111111111111),
+               (tokenizer.ConsumeIdentifier, 'ID11'), ':',
+               (tokenizer.ConsumeInteger, -22),
+               (tokenizer.ConsumeIdentifier, 'ID12'), ':',
+               (tokenizer.ConsumeInteger, 2222222222222222222),
+               (tokenizer.ConsumeIdentifier, 'ID13'), ':',
+               (tokenizer.ConsumeFloat, 1.23456),
+               (tokenizer.ConsumeIdentifier, 'ID14'), ':',
+               (tokenizer.ConsumeFloat, 1.2e+2),
+               (tokenizer.ConsumeIdentifier, 'false_bool'), ':',
+               (tokenizer.ConsumeBool, False),
+               (tokenizer.ConsumeIdentifier, 'true_BOOL'), ':',
+               (tokenizer.ConsumeBool, True),
+               (tokenizer.ConsumeIdentifier, 'true_bool1'), ':',
+               (tokenizer.ConsumeBool, True),
+               (tokenizer.ConsumeIdentifier, 'false_BOOL1'), ':',
+               (tokenizer.ConsumeBool, False),
+               (tokenizer.ConsumeIdentifier, 'False_bool'), ':',
+               (tokenizer.ConsumeBool, False),
+               (tokenizer.ConsumeIdentifier, 'True_bool'), ':',
+               (tokenizer.ConsumeBool, True),
+               (tokenizer.ConsumeIdentifier, 'X'), ':',
+               (tokenizer.ConsumeFloat, float('inf')),
+               (tokenizer.ConsumeIdentifier, 'Y'), ':',
+               (tokenizer.ConsumeFloat, float('-inf')),
+               (tokenizer.ConsumeIdentifier, 'Z'), ':',
+               (tokenizer.ConsumeFloat, float('nan'))]
+
+    i = 0
+    while not tokenizer.AtEnd():
+      m = methods[i]
+      if isinstance(m, str):
+        token = tokenizer.token
+        self.assertEqual(token, m)
+        tokenizer.NextToken()
+      elif isinstance(m[1], float) and math.isnan(m[1]):
+        self.assertTrue(math.isnan(m[0]()))
+      else:
+        self.assertEqual(m[1], m[0]())
+      i += 1
+
+  def testConsumeAbstractIntegers(self):
+    # This test only tests the failures in the integer parsing methods as well
+    # as the '0' special cases.
+    int64_max = (1 << 63) - 1
+    uint32_max = (1 << 32) - 1
+    text = '-1 %d %d' % (uint32_max + 1, int64_max + 1)
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertEqual(-1, tokenizer.ConsumeInteger())
+
+    self.assertEqual(uint32_max + 1, tokenizer.ConsumeInteger())
+
+    self.assertEqual(int64_max + 1, tokenizer.ConsumeInteger())
+    self.assertTrue(tokenizer.AtEnd())
+
+    text = '-0 0 0 1.2'
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertEqual(0, tokenizer.ConsumeInteger())
+    self.assertEqual(0, tokenizer.ConsumeInteger())
+    self.assertEqual(True, tokenizer.TryConsumeInteger())
+    self.assertEqual(False, tokenizer.TryConsumeInteger())
+    with self.assertRaises(text_format.ParseError):
+      tokenizer.ConsumeInteger()
+    self.assertEqual(1.2, tokenizer.ConsumeFloat())
+    self.assertTrue(tokenizer.AtEnd())
+
+  def testConsumeIntegers(self):
+    # This test only tests the failures in the integer parsing methods as well
+    # as the '0' special cases.
+    int64_max = (1 << 63) - 1
+    uint32_max = (1 << 32) - 1
+    text = '-1 %d %d' % (uint32_max + 1, int64_max + 1)
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertRaises(text_format.ParseError,
+                      text_format._ConsumeUint32, tokenizer)
+    self.assertRaises(text_format.ParseError,
+                      text_format._ConsumeUint64, tokenizer)
+    self.assertEqual(-1, text_format._ConsumeInt32(tokenizer))
+
+    self.assertRaises(text_format.ParseError,
+                      text_format._ConsumeUint32, tokenizer)
+    self.assertRaises(text_format.ParseError,
+                      text_format._ConsumeInt32, tokenizer)
+    self.assertEqual(uint32_max + 1, text_format._ConsumeInt64(tokenizer))
+
+    self.assertRaises(text_format.ParseError,
+                      text_format._ConsumeInt64, tokenizer)
+    self.assertEqual(int64_max + 1, text_format._ConsumeUint64(tokenizer))
+    self.assertTrue(tokenizer.AtEnd())
+
+    text = '-0 -0 0 0'
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertEqual(0, text_format._ConsumeUint32(tokenizer))
+    self.assertEqual(0, text_format._ConsumeUint64(tokenizer))
+    self.assertEqual(0, text_format._ConsumeUint32(tokenizer))
+    self.assertEqual(0, text_format._ConsumeUint64(tokenizer))
+    self.assertTrue(tokenizer.AtEnd())
+
+  def testConsumeOctalIntegers(self):
+    """Test support for C style octal integers."""
+    text = '00 -00 04 0755 -010 007 -0033 08 -09 01'
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertEqual(0, tokenizer.ConsumeInteger())
+    self.assertEqual(0, tokenizer.ConsumeInteger())
+    self.assertEqual(4, tokenizer.ConsumeInteger())
+    self.assertEqual(0o755, tokenizer.ConsumeInteger())
+    self.assertEqual(-0o10, tokenizer.ConsumeInteger())
+    self.assertEqual(7, tokenizer.ConsumeInteger())
+    self.assertEqual(-0o033, tokenizer.ConsumeInteger())
+    with self.assertRaises(text_format.ParseError):
+      tokenizer.ConsumeInteger()  # 08
+    tokenizer.NextToken()
+    with self.assertRaises(text_format.ParseError):
+      tokenizer.ConsumeInteger()  # -09
+    tokenizer.NextToken()
+    self.assertEqual(1, tokenizer.ConsumeInteger())
+    self.assertTrue(tokenizer.AtEnd())
+
+  def testConsumeByteString(self):
+    text = '"string1\''
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertRaises(text_format.ParseError, tokenizer.ConsumeByteString)
+
+    text = 'string1"'
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertRaises(text_format.ParseError, tokenizer.ConsumeByteString)
+
+    text = '\n"\\xt"'
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertRaises(text_format.ParseError, tokenizer.ConsumeByteString)
+
+    text = '\n"\\"'
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertRaises(text_format.ParseError, tokenizer.ConsumeByteString)
+
+    text = '\n"\\x"'
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertRaises(text_format.ParseError, tokenizer.ConsumeByteString)
+
+  def testConsumeBool(self):
+    text = 'not-a-bool'
+    tokenizer = text_format.Tokenizer(text.splitlines())
+    self.assertRaises(text_format.ParseError, tokenizer.ConsumeBool)
+
+  def testSkipComment(self):
+    tokenizer = text_format.Tokenizer('# some comment'.splitlines())
+    self.assertTrue(tokenizer.AtEnd())
+    self.assertRaises(text_format.ParseError, tokenizer.ConsumeComment)
+
+  def testConsumeComment(self):
+    tokenizer = text_format.Tokenizer('# some comment'.splitlines(),
+                                      skip_comments=False)
+    self.assertFalse(tokenizer.AtEnd())
+    self.assertEqual('# some comment', tokenizer.ConsumeComment())
+    self.assertTrue(tokenizer.AtEnd())
+
+  def testConsumeTwoComments(self):
+    text = '# some comment\n# another comment'
+    tokenizer = text_format.Tokenizer(text.splitlines(), skip_comments=False)
+    self.assertEqual('# some comment', tokenizer.ConsumeComment())
+    self.assertFalse(tokenizer.AtEnd())
+    self.assertEqual('# another comment', tokenizer.ConsumeComment())
+    self.assertTrue(tokenizer.AtEnd())
+
+  def testConsumeTrailingComment(self):
+    text = 'some_number: 4\n# some comment'
+    tokenizer = text_format.Tokenizer(text.splitlines(), skip_comments=False)
+    self.assertRaises(text_format.ParseError, tokenizer.ConsumeComment)
+
+    self.assertEqual('some_number', tokenizer.ConsumeIdentifier())
+    self.assertEqual(tokenizer.token, ':')
+    tokenizer.NextToken()
+    self.assertRaises(text_format.ParseError, tokenizer.ConsumeComment)
+    self.assertEqual(4, tokenizer.ConsumeInteger())
+    self.assertFalse(tokenizer.AtEnd())
+
+    self.assertEqual('# some comment', tokenizer.ConsumeComment())
+    self.assertTrue(tokenizer.AtEnd())
+
+  def testConsumeLineComment(self):
+    tokenizer = text_format.Tokenizer('# some comment'.splitlines(),
+                                      skip_comments=False)
+    self.assertFalse(tokenizer.AtEnd())
+    self.assertEqual((False, '# some comment'),
+                     tokenizer.ConsumeCommentOrTrailingComment())
+    self.assertTrue(tokenizer.AtEnd())
+
+  def testConsumeTwoLineComments(self):
+    text = '# some comment\n# another comment'
+    tokenizer = text_format.Tokenizer(text.splitlines(), skip_comments=False)
+    self.assertEqual((False, '# some comment'),
+                     tokenizer.ConsumeCommentOrTrailingComment())
+    self.assertFalse(tokenizer.AtEnd())
+    self.assertEqual((False, '# another comment'),
+                     tokenizer.ConsumeCommentOrTrailingComment())
+    self.assertTrue(tokenizer.AtEnd())
+
+  def testConsumeAndCheckTrailingComment(self):
+    text = 'some_number: 4  # some comment'  # trailing comment on the same line
+    tokenizer = text_format.Tokenizer(text.splitlines(), skip_comments=False)
+    self.assertRaises(text_format.ParseError,
+                      tokenizer.ConsumeCommentOrTrailingComment)
+
+    self.assertEqual('some_number', tokenizer.ConsumeIdentifier())
+    self.assertEqual(tokenizer.token, ':')
+    tokenizer.NextToken()
+    self.assertRaises(text_format.ParseError,
+                      tokenizer.ConsumeCommentOrTrailingComment)
+    self.assertEqual(4, tokenizer.ConsumeInteger())
+    self.assertFalse(tokenizer.AtEnd())
+
+    self.assertEqual((True, '# some comment'),
+                     tokenizer.ConsumeCommentOrTrailingComment())
+    self.assertTrue(tokenizer.AtEnd())
+
+  def testHashinComment(self):
+    text = 'some_number: 4  # some comment # not a new comment'
+    tokenizer = text_format.Tokenizer(text.splitlines(), skip_comments=False)
+    self.assertEqual('some_number', tokenizer.ConsumeIdentifier())
+    self.assertEqual(tokenizer.token, ':')
+    tokenizer.NextToken()
+    self.assertEqual(4, tokenizer.ConsumeInteger())
+    self.assertEqual((True, '# some comment # not a new comment'),
+                     tokenizer.ConsumeCommentOrTrailingComment())
+    self.assertTrue(tokenizer.AtEnd())
+
+  def testHugeString(self):
+    # With pathologic backtracking, fails with Forge OOM.
+    text = '"' + 'a' * (10 * 1024 * 1024) + '"'
+    tokenizer = text_format.Tokenizer(text.splitlines(), skip_comments=False)
+    tokenizer.ConsumeString()
+
+
+# Tests for pretty printer functionality.
+@_parameterized.parameters((unittest_pb2), (unittest_proto3_arena_pb2))
+class PrettyPrinterTest(TextFormatBase):
+
+  def testPrettyPrintNoMatch(self, message_module):
+
+    def printer(message, indent, as_one_line):
+      del message, indent, as_one_line
+      return None
+
+    message = message_module.TestAllTypes()
+    msg = message.repeated_nested_message.add()
+    msg.bb = 42
+    self.CompareToGoldenText(
+        text_format.MessageToString(
+            message, as_one_line=True, message_formatter=printer),
+        'repeated_nested_message { bb: 42 }')
+
+  def testPrettyPrintOneLine(self, message_module):
+
+    def printer(m, indent, as_one_line):
+      del indent, as_one_line
+      if m.DESCRIPTOR == message_module.TestAllTypes.NestedMessage.DESCRIPTOR:
+        return 'My lucky number is %s' % m.bb
+
+    message = message_module.TestAllTypes()
+    msg = message.repeated_nested_message.add()
+    msg.bb = 42
+    self.CompareToGoldenText(
+        text_format.MessageToString(
+            message, as_one_line=True, message_formatter=printer),
+        'repeated_nested_message { My lucky number is 42 }')
+
+  def testPrettyPrintMultiLine(self, message_module):
+
+    def printer(m, indent, as_one_line):
+      if m.DESCRIPTOR == message_module.TestAllTypes.NestedMessage.DESCRIPTOR:
+        line_deliminator = (' ' if as_one_line else '\n') + ' ' * indent
+        return 'My lucky number is:%s%s' % (line_deliminator, m.bb)
+      return None
+
+    message = message_module.TestAllTypes()
+    msg = message.repeated_nested_message.add()
+    msg.bb = 42
+    self.CompareToGoldenText(
+        text_format.MessageToString(
+            message, as_one_line=True, message_formatter=printer),
+        'repeated_nested_message { My lucky number is: 42 }')
+    self.CompareToGoldenText(
+        text_format.MessageToString(
+            message, as_one_line=False, message_formatter=printer),
+        'repeated_nested_message {\n  My lucky number is:\n  42\n}\n')
+
+  def testPrettyPrintEntireMessage(self, message_module):
+
+    def printer(m, indent, as_one_line):
+      del indent, as_one_line
+      if m.DESCRIPTOR == message_module.TestAllTypes.DESCRIPTOR:
+        return 'The is the message!'
+      return None
+
+    message = message_module.TestAllTypes()
+    self.CompareToGoldenText(
+        text_format.MessageToString(
+            message, as_one_line=False, message_formatter=printer),
+        'The is the message!\n')
+    self.CompareToGoldenText(
+        text_format.MessageToString(
+            message, as_one_line=True, message_formatter=printer),
+        'The is the message!')
+
+  def testPrettyPrintMultipleParts(self, message_module):
+
+    def printer(m, indent, as_one_line):
+      del indent, as_one_line
+      if m.DESCRIPTOR == message_module.TestAllTypes.NestedMessage.DESCRIPTOR:
+        return 'My lucky number is %s' % m.bb
+      return None
+
+    message = message_module.TestAllTypes()
+    message.optional_int32 = 61
+    msg = message.repeated_nested_message.add()
+    msg.bb = 42
+    msg = message.repeated_nested_message.add()
+    msg.bb = 99
+    msg = message.optional_nested_message
+    msg.bb = 1
+    self.CompareToGoldenText(
+        text_format.MessageToString(
+            message, as_one_line=True, message_formatter=printer),
+        ('optional_int32: 61 '
+         'optional_nested_message { My lucky number is 1 } '
+         'repeated_nested_message { My lucky number is 42 } '
+         'repeated_nested_message { My lucky number is 99 }'))
+
+    out = text_format.TextWriter(False)
+    text_format.PrintField(
+        message_module.TestAllTypes.DESCRIPTOR.fields_by_name[
+            'optional_nested_message'],
+        message.optional_nested_message,
+        out,
+        message_formatter=printer)
+    self.assertEqual(
+        'optional_nested_message {\n  My lucky number is 1\n}\n',
+        out.getvalue())
+    out.close()
+
+    out = text_format.TextWriter(False)
+    text_format.PrintFieldValue(
+        message_module.TestAllTypes.DESCRIPTOR.fields_by_name[
+            'optional_nested_message'],
+        message.optional_nested_message,
+        out,
+        message_formatter=printer)
+    self.assertEqual(
+        '{\n  My lucky number is 1\n}',
+        out.getvalue())
+    out.close()
+
+
+class WhitespaceTest(TextFormatBase):
+
+  def setUp(self):
+    self.out = text_format.TextWriter(False)
+    self.addCleanup(self.out.close)
+    self.message = unittest_pb2.NestedTestAllTypes()
+    self.message.child.payload.optional_string = 'value'
+    self.field = self.message.DESCRIPTOR.fields_by_name['child']
+    self.value = self.message.child
+
+  def testMessageToString(self):
+    self.CompareToGoldenText(
+        text_format.MessageToString(self.message),
+        textwrap.dedent("""\
+            child {
+              payload {
+                optional_string: "value"
+              }
+            }
+            """))
+
+  def testPrintMessage(self):
+    text_format.PrintMessage(self.message, self.out)
+    self.CompareToGoldenText(
+        self.out.getvalue(),
+        textwrap.dedent("""\
+            child {
+              payload {
+                optional_string: "value"
+              }
+            }
+            """))
+
+  def testPrintField(self):
+    text_format.PrintField(self.field, self.value, self.out)
+    self.CompareToGoldenText(
+        self.out.getvalue(),
+        textwrap.dedent("""\
+            child {
+              payload {
+                optional_string: "value"
+              }
+            }
+            """))
+
+  def testPrintFieldValue(self):
+    text_format.PrintFieldValue(
+        self.field, self.value, self.out)
+    self.CompareToGoldenText(
+        self.out.getvalue(),
+        textwrap.dedent("""\
+            {
+              payload {
+                optional_string: "value"
+              }
+            }"""))
+
+
+class OptionalColonMessageToStringTest(unittest.TestCase):
+
+  def testForcePrintOptionalColon(self):
+    packed_message = unittest_pb2.OneString()
+    packed_message.data = 'string'
+    message = any_test_pb2.TestAny()
+    message.any_value.Pack(packed_message)
+    output = text_format.MessageToString(
+        message,
+        force_colon=True)
+    expected = ('any_value: {\n'
+                '  [type.googleapis.com/protobuf_unittest.OneString]: {\n'
+                '    data: "string"\n'
+                '  }\n'
+                '}\n')
+    self.assertEqual(expected, output)
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/type_checkers.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/type_checkers.py
new file mode 100644
index 0000000..bfde1c3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/type_checkers.py
@@ -0,0 +1,431 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Provides type checking routines.
+
+This module defines type checking utilities in the forms of dictionaries:
+
+VALUE_CHECKERS: A dictionary of field types and a value validation object.
+TYPE_TO_BYTE_SIZE_FN: A dictionary with field types and a size computing
+  function.
+TYPE_TO_SERIALIZE_METHOD: A dictionary with field types and serialization
+  function.
+FIELD_TYPE_TO_WIRE_TYPE: A dictionary with field typed and their
+  corresponding wire types.
+TYPE_TO_DESERIALIZE_METHOD: A dictionary with field types and deserialization
+  function.
+"""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+try:
+  import ctypes
+except Exception:  # pylint: disable=broad-except
+  ctypes = None
+  import struct
+import numbers
+import six
+
+if six.PY3:
+  long = int
+
+from google.protobuf.internal import api_implementation
+from google.protobuf.internal import decoder
+from google.protobuf.internal import encoder
+from google.protobuf.internal import wire_format
+from google.protobuf import descriptor
+
+_FieldDescriptor = descriptor.FieldDescriptor
+
+
+def TruncateToFourByteFloat(original):
+  if ctypes:
+    return ctypes.c_float(original).value
+  else:
+    return struct.unpack('<f', struct.pack('<f', original))[0]
+
+
+def ToShortestFloat(original):
+  """Returns the shortest float that has same value in wire."""
+  # Return the original value if it is not truncated. This may happen
+  # if someone mixes this code with an old protobuf runtime.
+  # TODO(jieluo): Remove it after maybe 2022.
+  if TruncateToFourByteFloat(original) != original:
+    return original
+  # All 4 byte floats have between 6 and 9 significant digits, so we
+  # start with 6 as the lower bound.
+  # It has to be iterative because use '.9g' directly can not get rid
+  # of the noises for most values. For example if set a float_field=0.9
+  # use '.9g' will print 0.899999976.
+  precision = 6
+  rounded = float('{0:.{1}g}'.format(original, precision))
+  while TruncateToFourByteFloat(rounded) != original:
+    precision += 1
+    rounded = float('{0:.{1}g}'.format(original, precision))
+  return rounded
+
+
+def SupportsOpenEnums(field_descriptor):
+  return field_descriptor.containing_type.syntax == "proto3"
+
+def GetTypeChecker(field):
+  """Returns a type checker for a message field of the specified types.
+
+  Args:
+    field: FieldDescriptor object for this field.
+
+  Returns:
+    An instance of TypeChecker which can be used to verify the types
+    of values assigned to a field of the specified type.
+  """
+  if (field.cpp_type == _FieldDescriptor.CPPTYPE_STRING and
+      field.type == _FieldDescriptor.TYPE_STRING):
+    return UnicodeValueChecker()
+  if field.cpp_type == _FieldDescriptor.CPPTYPE_ENUM:
+    if SupportsOpenEnums(field):
+      # When open enums are supported, any int32 can be assigned.
+      return _VALUE_CHECKERS[_FieldDescriptor.CPPTYPE_INT32]
+    else:
+      return EnumValueChecker(field.enum_type)
+  return _VALUE_CHECKERS[field.cpp_type]
+
+
+# None of the typecheckers below make any attempt to guard against people
+# subclassing builtin types and doing weird things.  We're not trying to
+# protect against malicious clients here, just people accidentally shooting
+# themselves in the foot in obvious ways.
+
+class TypeChecker(object):
+
+  """Type checker used to catch type errors as early as possible
+  when the client is setting scalar fields in protocol messages.
+  """
+
+  def __init__(self, *acceptable_types):
+    self._acceptable_types = acceptable_types
+
+  def CheckValue(self, proposed_value):
+    """Type check the provided value and return it.
+
+    The returned value might have been normalized to another type.
+    """
+    if not isinstance(proposed_value, self._acceptable_types):
+      message = ('%.1024r has type %s, but expected one of: %s' %
+                 (proposed_value, type(proposed_value), self._acceptable_types))
+      raise TypeError(message)
+    # Some field types(float, double and bool) accept other types, must
+    # convert to the correct type in such cases.
+    if self._acceptable_types:
+      if self._acceptable_types[0] in (bool, float):
+        return self._acceptable_types[0](proposed_value)
+    return proposed_value
+
+
+class TypeCheckerWithDefault(TypeChecker):
+
+  def __init__(self, default_value, *acceptable_types):
+    TypeChecker.__init__(self, *acceptable_types)
+    self._default_value = default_value
+
+  def DefaultValue(self):
+    return self._default_value
+
+
+# IntValueChecker and its subclasses perform integer type-checks
+# and bounds-checks.
+class IntValueChecker(object):
+
+  """Checker used for integer fields.  Performs type-check and range check."""
+
+  def CheckValue(self, proposed_value):
+    if not isinstance(proposed_value, numbers.Integral):
+      message = ('%.1024r has type %s, but expected one of: %s' %
+                 (proposed_value, type(proposed_value), six.integer_types))
+      raise TypeError(message)
+    if not self._MIN <= int(proposed_value) <= self._MAX:
+      raise ValueError('Value out of range: %d' % proposed_value)
+    # We force 32-bit values to int and 64-bit values to long to make
+    # alternate implementations where the distinction is more significant
+    # (e.g. the C++ implementation) simpler.
+    proposed_value = self._TYPE(proposed_value)
+    return proposed_value
+
+  def DefaultValue(self):
+    return 0
+
+
+class EnumValueChecker(object):
+
+  """Checker used for enum fields.  Performs type-check and range check."""
+
+  def __init__(self, enum_type):
+    self._enum_type = enum_type
+
+  def CheckValue(self, proposed_value):
+    if not isinstance(proposed_value, numbers.Integral):
+      message = ('%.1024r has type %s, but expected one of: %s' %
+                 (proposed_value, type(proposed_value), six.integer_types))
+      raise TypeError(message)
+    if int(proposed_value) not in self._enum_type.values_by_number:
+      raise ValueError('Unknown enum value: %d' % proposed_value)
+    return proposed_value
+
+  def DefaultValue(self):
+    return self._enum_type.values[0].number
+
+
+class UnicodeValueChecker(object):
+
+  """Checker used for string fields.
+
+  Always returns a unicode value, even if the input is of type str.
+  """
+
+  def CheckValue(self, proposed_value):
+    if not isinstance(proposed_value, (bytes, six.text_type)):
+      message = ('%.1024r has type %s, but expected one of: %s' %
+                 (proposed_value, type(proposed_value), (bytes, six.text_type)))
+      raise TypeError(message)
+
+    # If the value is of type 'bytes' make sure that it is valid UTF-8 data.
+    if isinstance(proposed_value, bytes):
+      try:
+        proposed_value = proposed_value.decode('utf-8')
+      except UnicodeDecodeError:
+        raise ValueError('%.1024r has type bytes, but isn\'t valid UTF-8 '
+                         'encoding. Non-UTF-8 strings must be converted to '
+                         'unicode objects before being added.' %
+                         (proposed_value))
+    else:
+      try:
+        proposed_value.encode('utf8')
+      except UnicodeEncodeError:
+        raise ValueError('%.1024r isn\'t a valid unicode string and '
+                         'can\'t be encoded in UTF-8.'%
+                         (proposed_value))
+
+    return proposed_value
+
+  def DefaultValue(self):
+    return u""
+
+
+class Int32ValueChecker(IntValueChecker):
+  # We're sure to use ints instead of longs here since comparison may be more
+  # efficient.
+  _MIN = -2147483648
+  _MAX = 2147483647
+  _TYPE = int
+
+
+class Uint32ValueChecker(IntValueChecker):
+  _MIN = 0
+  _MAX = (1 << 32) - 1
+  _TYPE = int
+
+
+class Int64ValueChecker(IntValueChecker):
+  _MIN = -(1 << 63)
+  _MAX = (1 << 63) - 1
+  _TYPE = long
+
+
+class Uint64ValueChecker(IntValueChecker):
+  _MIN = 0
+  _MAX = (1 << 64) - 1
+  _TYPE = long
+
+
+# The max 4 bytes float is about 3.4028234663852886e+38
+_FLOAT_MAX = float.fromhex('0x1.fffffep+127')
+_FLOAT_MIN = -_FLOAT_MAX
+_INF = float('inf')
+_NEG_INF = float('-inf')
+
+
+class FloatValueChecker(object):
+
+  """Checker used for float fields.  Performs type-check and range check.
+
+  Values exceeding a 32-bit float will be converted to inf/-inf.
+  """
+
+  def CheckValue(self, proposed_value):
+    """Check and convert proposed_value to float."""
+    if not isinstance(proposed_value, numbers.Real):
+      message = ('%.1024r has type %s, but expected one of: numbers.Real' %
+                 (proposed_value, type(proposed_value)))
+      raise TypeError(message)
+    converted_value = float(proposed_value)
+    # This inf rounding matches the C++ proto SafeDoubleToFloat logic.
+    if converted_value > _FLOAT_MAX:
+      return _INF
+    if converted_value < _FLOAT_MIN:
+      return _NEG_INF
+
+    return TruncateToFourByteFloat(converted_value)
+
+  def DefaultValue(self):
+    return 0.0
+
+
+# Type-checkers for all scalar CPPTYPEs.
+_VALUE_CHECKERS = {
+    _FieldDescriptor.CPPTYPE_INT32: Int32ValueChecker(),
+    _FieldDescriptor.CPPTYPE_INT64: Int64ValueChecker(),
+    _FieldDescriptor.CPPTYPE_UINT32: Uint32ValueChecker(),
+    _FieldDescriptor.CPPTYPE_UINT64: Uint64ValueChecker(),
+    _FieldDescriptor.CPPTYPE_DOUBLE: TypeCheckerWithDefault(
+        0.0, float, numbers.Real),
+    _FieldDescriptor.CPPTYPE_FLOAT: FloatValueChecker(),
+    _FieldDescriptor.CPPTYPE_BOOL: TypeCheckerWithDefault(
+        False, bool, numbers.Integral),
+    _FieldDescriptor.CPPTYPE_STRING: TypeCheckerWithDefault(b'', bytes),
+    }
+
+
+# Map from field type to a function F, such that F(field_num, value)
+# gives the total byte size for a value of the given type.  This
+# byte size includes tag information and any other additional space
+# associated with serializing "value".
+TYPE_TO_BYTE_SIZE_FN = {
+    _FieldDescriptor.TYPE_DOUBLE: wire_format.DoubleByteSize,
+    _FieldDescriptor.TYPE_FLOAT: wire_format.FloatByteSize,
+    _FieldDescriptor.TYPE_INT64: wire_format.Int64ByteSize,
+    _FieldDescriptor.TYPE_UINT64: wire_format.UInt64ByteSize,
+    _FieldDescriptor.TYPE_INT32: wire_format.Int32ByteSize,
+    _FieldDescriptor.TYPE_FIXED64: wire_format.Fixed64ByteSize,
+    _FieldDescriptor.TYPE_FIXED32: wire_format.Fixed32ByteSize,
+    _FieldDescriptor.TYPE_BOOL: wire_format.BoolByteSize,
+    _FieldDescriptor.TYPE_STRING: wire_format.StringByteSize,
+    _FieldDescriptor.TYPE_GROUP: wire_format.GroupByteSize,
+    _FieldDescriptor.TYPE_MESSAGE: wire_format.MessageByteSize,
+    _FieldDescriptor.TYPE_BYTES: wire_format.BytesByteSize,
+    _FieldDescriptor.TYPE_UINT32: wire_format.UInt32ByteSize,
+    _FieldDescriptor.TYPE_ENUM: wire_format.EnumByteSize,
+    _FieldDescriptor.TYPE_SFIXED32: wire_format.SFixed32ByteSize,
+    _FieldDescriptor.TYPE_SFIXED64: wire_format.SFixed64ByteSize,
+    _FieldDescriptor.TYPE_SINT32: wire_format.SInt32ByteSize,
+    _FieldDescriptor.TYPE_SINT64: wire_format.SInt64ByteSize
+    }
+
+
+# Maps from field types to encoder constructors.
+TYPE_TO_ENCODER = {
+    _FieldDescriptor.TYPE_DOUBLE: encoder.DoubleEncoder,
+    _FieldDescriptor.TYPE_FLOAT: encoder.FloatEncoder,
+    _FieldDescriptor.TYPE_INT64: encoder.Int64Encoder,
+    _FieldDescriptor.TYPE_UINT64: encoder.UInt64Encoder,
+    _FieldDescriptor.TYPE_INT32: encoder.Int32Encoder,
+    _FieldDescriptor.TYPE_FIXED64: encoder.Fixed64Encoder,
+    _FieldDescriptor.TYPE_FIXED32: encoder.Fixed32Encoder,
+    _FieldDescriptor.TYPE_BOOL: encoder.BoolEncoder,
+    _FieldDescriptor.TYPE_STRING: encoder.StringEncoder,
+    _FieldDescriptor.TYPE_GROUP: encoder.GroupEncoder,
+    _FieldDescriptor.TYPE_MESSAGE: encoder.MessageEncoder,
+    _FieldDescriptor.TYPE_BYTES: encoder.BytesEncoder,
+    _FieldDescriptor.TYPE_UINT32: encoder.UInt32Encoder,
+    _FieldDescriptor.TYPE_ENUM: encoder.EnumEncoder,
+    _FieldDescriptor.TYPE_SFIXED32: encoder.SFixed32Encoder,
+    _FieldDescriptor.TYPE_SFIXED64: encoder.SFixed64Encoder,
+    _FieldDescriptor.TYPE_SINT32: encoder.SInt32Encoder,
+    _FieldDescriptor.TYPE_SINT64: encoder.SInt64Encoder,
+    }
+
+
+# Maps from field types to sizer constructors.
+TYPE_TO_SIZER = {
+    _FieldDescriptor.TYPE_DOUBLE: encoder.DoubleSizer,
+    _FieldDescriptor.TYPE_FLOAT: encoder.FloatSizer,
+    _FieldDescriptor.TYPE_INT64: encoder.Int64Sizer,
+    _FieldDescriptor.TYPE_UINT64: encoder.UInt64Sizer,
+    _FieldDescriptor.TYPE_INT32: encoder.Int32Sizer,
+    _FieldDescriptor.TYPE_FIXED64: encoder.Fixed64Sizer,
+    _FieldDescriptor.TYPE_FIXED32: encoder.Fixed32Sizer,
+    _FieldDescriptor.TYPE_BOOL: encoder.BoolSizer,
+    _FieldDescriptor.TYPE_STRING: encoder.StringSizer,
+    _FieldDescriptor.TYPE_GROUP: encoder.GroupSizer,
+    _FieldDescriptor.TYPE_MESSAGE: encoder.MessageSizer,
+    _FieldDescriptor.TYPE_BYTES: encoder.BytesSizer,
+    _FieldDescriptor.TYPE_UINT32: encoder.UInt32Sizer,
+    _FieldDescriptor.TYPE_ENUM: encoder.EnumSizer,
+    _FieldDescriptor.TYPE_SFIXED32: encoder.SFixed32Sizer,
+    _FieldDescriptor.TYPE_SFIXED64: encoder.SFixed64Sizer,
+    _FieldDescriptor.TYPE_SINT32: encoder.SInt32Sizer,
+    _FieldDescriptor.TYPE_SINT64: encoder.SInt64Sizer,
+    }
+
+
+# Maps from field type to a decoder constructor.
+TYPE_TO_DECODER = {
+    _FieldDescriptor.TYPE_DOUBLE: decoder.DoubleDecoder,
+    _FieldDescriptor.TYPE_FLOAT: decoder.FloatDecoder,
+    _FieldDescriptor.TYPE_INT64: decoder.Int64Decoder,
+    _FieldDescriptor.TYPE_UINT64: decoder.UInt64Decoder,
+    _FieldDescriptor.TYPE_INT32: decoder.Int32Decoder,
+    _FieldDescriptor.TYPE_FIXED64: decoder.Fixed64Decoder,
+    _FieldDescriptor.TYPE_FIXED32: decoder.Fixed32Decoder,
+    _FieldDescriptor.TYPE_BOOL: decoder.BoolDecoder,
+    _FieldDescriptor.TYPE_STRING: decoder.StringDecoder,
+    _FieldDescriptor.TYPE_GROUP: decoder.GroupDecoder,
+    _FieldDescriptor.TYPE_MESSAGE: decoder.MessageDecoder,
+    _FieldDescriptor.TYPE_BYTES: decoder.BytesDecoder,
+    _FieldDescriptor.TYPE_UINT32: decoder.UInt32Decoder,
+    _FieldDescriptor.TYPE_ENUM: decoder.EnumDecoder,
+    _FieldDescriptor.TYPE_SFIXED32: decoder.SFixed32Decoder,
+    _FieldDescriptor.TYPE_SFIXED64: decoder.SFixed64Decoder,
+    _FieldDescriptor.TYPE_SINT32: decoder.SInt32Decoder,
+    _FieldDescriptor.TYPE_SINT64: decoder.SInt64Decoder,
+    }
+
+# Maps from field type to expected wiretype.
+FIELD_TYPE_TO_WIRE_TYPE = {
+    _FieldDescriptor.TYPE_DOUBLE: wire_format.WIRETYPE_FIXED64,
+    _FieldDescriptor.TYPE_FLOAT: wire_format.WIRETYPE_FIXED32,
+    _FieldDescriptor.TYPE_INT64: wire_format.WIRETYPE_VARINT,
+    _FieldDescriptor.TYPE_UINT64: wire_format.WIRETYPE_VARINT,
+    _FieldDescriptor.TYPE_INT32: wire_format.WIRETYPE_VARINT,
+    _FieldDescriptor.TYPE_FIXED64: wire_format.WIRETYPE_FIXED64,
+    _FieldDescriptor.TYPE_FIXED32: wire_format.WIRETYPE_FIXED32,
+    _FieldDescriptor.TYPE_BOOL: wire_format.WIRETYPE_VARINT,
+    _FieldDescriptor.TYPE_STRING:
+      wire_format.WIRETYPE_LENGTH_DELIMITED,
+    _FieldDescriptor.TYPE_GROUP: wire_format.WIRETYPE_START_GROUP,
+    _FieldDescriptor.TYPE_MESSAGE:
+      wire_format.WIRETYPE_LENGTH_DELIMITED,
+    _FieldDescriptor.TYPE_BYTES:
+      wire_format.WIRETYPE_LENGTH_DELIMITED,
+    _FieldDescriptor.TYPE_UINT32: wire_format.WIRETYPE_VARINT,
+    _FieldDescriptor.TYPE_ENUM: wire_format.WIRETYPE_VARINT,
+    _FieldDescriptor.TYPE_SFIXED32: wire_format.WIRETYPE_FIXED32,
+    _FieldDescriptor.TYPE_SFIXED64: wire_format.WIRETYPE_FIXED64,
+    _FieldDescriptor.TYPE_SINT32: wire_format.WIRETYPE_VARINT,
+    _FieldDescriptor.TYPE_SINT64: wire_format.WIRETYPE_VARINT,
+    }
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/unknown_fields_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/unknown_fields_test.py
new file mode 100644
index 0000000..277603d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/unknown_fields_test.py
@@ -0,0 +1,454 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Test for preservation of unknown fields in the pure Python implementation."""
+
+__author__ = 'bohdank@google.com (Bohdan Koval)'
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+from google.protobuf import map_unittest_pb2
+from google.protobuf import unittest_mset_pb2
+from google.protobuf import unittest_pb2
+from google.protobuf import unittest_proto3_arena_pb2
+from google.protobuf.internal import api_implementation
+from google.protobuf.internal import encoder
+from google.protobuf.internal import message_set_extensions_pb2
+from google.protobuf.internal import missing_enum_values_pb2
+from google.protobuf.internal import test_util
+from google.protobuf.internal import testing_refleaks
+from google.protobuf.internal import type_checkers
+from google.protobuf.internal import wire_format
+from google.protobuf import descriptor
+
+
+@testing_refleaks.TestCase
+class UnknownFieldsTest(unittest.TestCase):
+
+  def setUp(self):
+    self.descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
+    self.all_fields = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(self.all_fields)
+    self.all_fields_data = self.all_fields.SerializeToString()
+    self.empty_message = unittest_pb2.TestEmptyMessage()
+    self.empty_message.ParseFromString(self.all_fields_data)
+
+  def testSerialize(self):
+    data = self.empty_message.SerializeToString()
+
+    # Don't use assertEqual because we don't want to dump raw binary data to
+    # stdout.
+    self.assertTrue(data == self.all_fields_data)
+
+  def testSerializeProto3(self):
+    # Verify proto3 unknown fields behavior.
+    message = unittest_proto3_arena_pb2.TestEmptyMessage()
+    message.ParseFromString(self.all_fields_data)
+    self.assertEqual(self.all_fields_data, message.SerializeToString())
+
+  def testByteSize(self):
+    self.assertEqual(self.all_fields.ByteSize(), self.empty_message.ByteSize())
+
+  def testListFields(self):
+    # Make sure ListFields doesn't return unknown fields.
+    self.assertEqual(0, len(self.empty_message.ListFields()))
+
+  def testSerializeMessageSetWireFormatUnknownExtension(self):
+    # Create a message using the message set wire format with an unknown
+    # message.
+    raw = unittest_mset_pb2.RawMessageSet()
+
+    # Add an unknown extension.
+    item = raw.item.add()
+    item.type_id = 98218603
+    message1 = message_set_extensions_pb2.TestMessageSetExtension1()
+    message1.i = 12345
+    item.message = message1.SerializeToString()
+
+    serialized = raw.SerializeToString()
+
+    # Parse message using the message set wire format.
+    proto = message_set_extensions_pb2.TestMessageSet()
+    proto.MergeFromString(serialized)
+
+    unknown_fields = proto.UnknownFields()
+    self.assertEqual(len(unknown_fields), 1)
+    # Unknown field should have wire format data which can be parsed back to
+    # original message.
+    self.assertEqual(unknown_fields[0].field_number, item.type_id)
+    self.assertEqual(unknown_fields[0].wire_type,
+                     wire_format.WIRETYPE_LENGTH_DELIMITED)
+    d = unknown_fields[0].data
+    message_new = message_set_extensions_pb2.TestMessageSetExtension1()
+    message_new.ParseFromString(d)
+    self.assertEqual(message1, message_new)
+
+    # Verify that the unknown extension is serialized unchanged
+    reserialized = proto.SerializeToString()
+    new_raw = unittest_mset_pb2.RawMessageSet()
+    new_raw.MergeFromString(reserialized)
+    self.assertEqual(raw, new_raw)
+
+  def testEquals(self):
+    message = unittest_pb2.TestEmptyMessage()
+    message.ParseFromString(self.all_fields_data)
+    self.assertEqual(self.empty_message, message)
+
+    self.all_fields.ClearField('optional_string')
+    message.ParseFromString(self.all_fields.SerializeToString())
+    self.assertNotEqual(self.empty_message, message)
+
+  def testDiscardUnknownFields(self):
+    self.empty_message.DiscardUnknownFields()
+    self.assertEqual(b'', self.empty_message.SerializeToString())
+    # Test message field and repeated message field.
+    message = unittest_pb2.TestAllTypes()
+    other_message = unittest_pb2.TestAllTypes()
+    other_message.optional_string = 'discard'
+    message.optional_nested_message.ParseFromString(
+        other_message.SerializeToString())
+    message.repeated_nested_message.add().ParseFromString(
+        other_message.SerializeToString())
+    self.assertNotEqual(
+        b'', message.optional_nested_message.SerializeToString())
+    self.assertNotEqual(
+        b'', message.repeated_nested_message[0].SerializeToString())
+    message.DiscardUnknownFields()
+    self.assertEqual(b'', message.optional_nested_message.SerializeToString())
+    self.assertEqual(
+        b'', message.repeated_nested_message[0].SerializeToString())
+
+    msg = map_unittest_pb2.TestMap()
+    msg.map_int32_all_types[1].optional_nested_message.ParseFromString(
+        other_message.SerializeToString())
+    msg.map_string_string['1'] = 'test'
+    self.assertNotEqual(
+        b'',
+        msg.map_int32_all_types[1].optional_nested_message.SerializeToString())
+    msg.DiscardUnknownFields()
+    self.assertEqual(
+        b'',
+        msg.map_int32_all_types[1].optional_nested_message.SerializeToString())
+
+
+@testing_refleaks.TestCase
+class UnknownFieldsAccessorsTest(unittest.TestCase):
+
+  def setUp(self):
+    self.descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
+    self.all_fields = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(self.all_fields)
+    self.all_fields_data = self.all_fields.SerializeToString()
+    self.empty_message = unittest_pb2.TestEmptyMessage()
+    self.empty_message.ParseFromString(self.all_fields_data)
+
+  # InternalCheckUnknownField() is an additional Pure Python check which checks
+  # a detail of unknown fields. It cannot be used by the C++
+  # implementation because some protect members are called.
+  # The test is added for historical reasons. It is not necessary as
+  # serialized string is checked.
+  # TODO(jieluo): Remove message._unknown_fields.
+  def InternalCheckUnknownField(self, name, expected_value):
+    if api_implementation.Type() == 'cpp':
+      return
+    field_descriptor = self.descriptor.fields_by_name[name]
+    wire_type = type_checkers.FIELD_TYPE_TO_WIRE_TYPE[field_descriptor.type]
+    field_tag = encoder.TagBytes(field_descriptor.number, wire_type)
+    result_dict = {}
+    for tag_bytes, value in self.empty_message._unknown_fields:
+      if tag_bytes == field_tag:
+        decoder = unittest_pb2.TestAllTypes._decoders_by_tag[tag_bytes][0]
+        decoder(memoryview(value), 0, len(value), self.all_fields, result_dict)
+    self.assertEqual(expected_value, result_dict[field_descriptor])
+
+  def CheckUnknownField(self, name, unknown_fields, expected_value):
+    field_descriptor = self.descriptor.fields_by_name[name]
+    expected_type = type_checkers.FIELD_TYPE_TO_WIRE_TYPE[
+        field_descriptor.type]
+    for unknown_field in unknown_fields:
+      if unknown_field.field_number == field_descriptor.number:
+        self.assertEqual(expected_type, unknown_field.wire_type)
+        if expected_type == 3:
+          # Check group
+          self.assertEqual(expected_value[0],
+                           unknown_field.data[0].field_number)
+          self.assertEqual(expected_value[1], unknown_field.data[0].wire_type)
+          self.assertEqual(expected_value[2], unknown_field.data[0].data)
+          continue
+        if expected_type == wire_format.WIRETYPE_LENGTH_DELIMITED:
+          self.assertIn(type(unknown_field.data), (str, bytes))
+        if field_descriptor.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+          self.assertIn(unknown_field.data, expected_value)
+        else:
+          self.assertEqual(expected_value, unknown_field.data)
+
+  def testCheckUnknownFieldValue(self):
+    unknown_fields = self.empty_message.UnknownFields()
+    # Test enum.
+    self.CheckUnknownField('optional_nested_enum',
+                           unknown_fields,
+                           self.all_fields.optional_nested_enum)
+    self.InternalCheckUnknownField('optional_nested_enum',
+                                   self.all_fields.optional_nested_enum)
+
+    # Test repeated enum.
+    self.CheckUnknownField('repeated_nested_enum',
+                           unknown_fields,
+                           self.all_fields.repeated_nested_enum)
+    self.InternalCheckUnknownField('repeated_nested_enum',
+                                   self.all_fields.repeated_nested_enum)
+
+    # Test varint.
+    self.CheckUnknownField('optional_int32',
+                           unknown_fields,
+                           self.all_fields.optional_int32)
+    self.InternalCheckUnknownField('optional_int32',
+                                   self.all_fields.optional_int32)
+
+    # Test fixed32.
+    self.CheckUnknownField('optional_fixed32',
+                           unknown_fields,
+                           self.all_fields.optional_fixed32)
+    self.InternalCheckUnknownField('optional_fixed32',
+                                   self.all_fields.optional_fixed32)
+
+    # Test fixed64.
+    self.CheckUnknownField('optional_fixed64',
+                           unknown_fields,
+                           self.all_fields.optional_fixed64)
+    self.InternalCheckUnknownField('optional_fixed64',
+                                   self.all_fields.optional_fixed64)
+
+    # Test length delimited.
+    self.CheckUnknownField('optional_string',
+                           unknown_fields,
+                           self.all_fields.optional_string.encode('utf-8'))
+    self.InternalCheckUnknownField('optional_string',
+                                   self.all_fields.optional_string)
+
+    # Test group.
+    self.CheckUnknownField('optionalgroup',
+                           unknown_fields,
+                           (17, 0, 117))
+    self.InternalCheckUnknownField('optionalgroup',
+                                   self.all_fields.optionalgroup)
+
+    self.assertEqual(97, len(unknown_fields))
+
+  def testCopyFrom(self):
+    message = unittest_pb2.TestEmptyMessage()
+    message.CopyFrom(self.empty_message)
+    self.assertEqual(message.SerializeToString(), self.all_fields_data)
+
+  def testMergeFrom(self):
+    message = unittest_pb2.TestAllTypes()
+    message.optional_int32 = 1
+    message.optional_uint32 = 2
+    source = unittest_pb2.TestEmptyMessage()
+    source.ParseFromString(message.SerializeToString())
+
+    message.ClearField('optional_int32')
+    message.optional_int64 = 3
+    message.optional_uint32 = 4
+    destination = unittest_pb2.TestEmptyMessage()
+    unknown_fields = destination.UnknownFields()
+    self.assertEqual(0, len(unknown_fields))
+    destination.ParseFromString(message.SerializeToString())
+    # ParseFromString clears the message thus unknown fields is invalid.
+    with self.assertRaises(ValueError) as context:
+      len(unknown_fields)
+    self.assertIn('UnknownFields does not exist.',
+                  str(context.exception))
+    unknown_fields = destination.UnknownFields()
+    self.assertEqual(2, len(unknown_fields))
+    destination.MergeFrom(source)
+    self.assertEqual(4, len(unknown_fields))
+    # Check that the fields where correctly merged, even stored in the unknown
+    # fields set.
+    message.ParseFromString(destination.SerializeToString())
+    self.assertEqual(message.optional_int32, 1)
+    self.assertEqual(message.optional_uint32, 2)
+    self.assertEqual(message.optional_int64, 3)
+
+  def testClear(self):
+    unknown_fields = self.empty_message.UnknownFields()
+    self.empty_message.Clear()
+    # All cleared, even unknown fields.
+    self.assertEqual(self.empty_message.SerializeToString(), b'')
+    with self.assertRaises(ValueError) as context:
+      len(unknown_fields)
+    self.assertIn('UnknownFields does not exist.',
+                  str(context.exception))
+
+  def testSubUnknownFields(self):
+    message = unittest_pb2.TestAllTypes()
+    message.optionalgroup.a = 123
+    destination = unittest_pb2.TestEmptyMessage()
+    destination.ParseFromString(message.SerializeToString())
+    sub_unknown_fields = destination.UnknownFields()[0].data
+    self.assertEqual(1, len(sub_unknown_fields))
+    self.assertEqual(sub_unknown_fields[0].data, 123)
+    destination.Clear()
+    with self.assertRaises(ValueError) as context:
+      len(sub_unknown_fields)
+    self.assertIn('UnknownFields does not exist.',
+                  str(context.exception))
+    with self.assertRaises(ValueError) as context:
+      # pylint: disable=pointless-statement
+      sub_unknown_fields[0]
+    self.assertIn('UnknownFields does not exist.',
+                  str(context.exception))
+    message.Clear()
+    message.optional_uint32 = 456
+    nested_message = unittest_pb2.NestedTestAllTypes()
+    nested_message.payload.optional_nested_message.ParseFromString(
+        message.SerializeToString())
+    unknown_fields = (
+        nested_message.payload.optional_nested_message.UnknownFields())
+    self.assertEqual(unknown_fields[0].data, 456)
+    nested_message.ClearField('payload')
+    self.assertEqual(unknown_fields[0].data, 456)
+    unknown_fields = (
+        nested_message.payload.optional_nested_message.UnknownFields())
+    self.assertEqual(0, len(unknown_fields))
+
+  def testUnknownField(self):
+    message = unittest_pb2.TestAllTypes()
+    message.optional_int32 = 123
+    destination = unittest_pb2.TestEmptyMessage()
+    destination.ParseFromString(message.SerializeToString())
+    unknown_field = destination.UnknownFields()[0]
+    destination.Clear()
+    with self.assertRaises(ValueError) as context:
+      unknown_field.data    # pylint: disable=pointless-statement
+    self.assertIn('The parent message might be cleared.',
+                  str(context.exception))
+
+  def testUnknownExtensions(self):
+    message = unittest_pb2.TestEmptyMessageWithExtensions()
+    message.ParseFromString(self.all_fields_data)
+    self.assertEqual(len(message.UnknownFields()), 97)
+    self.assertEqual(message.SerializeToString(), self.all_fields_data)
+
+
+@testing_refleaks.TestCase
+class UnknownEnumValuesTest(unittest.TestCase):
+
+  def setUp(self):
+    self.descriptor = missing_enum_values_pb2.TestEnumValues.DESCRIPTOR
+
+    self.message = missing_enum_values_pb2.TestEnumValues()
+    # TestEnumValues.ZERO = 0, but does not exist in the other NestedEnum.
+    self.message.optional_nested_enum = (
+        missing_enum_values_pb2.TestEnumValues.ZERO)
+    self.message.repeated_nested_enum.extend([
+        missing_enum_values_pb2.TestEnumValues.ZERO,
+        missing_enum_values_pb2.TestEnumValues.ONE,
+        ])
+    self.message.packed_nested_enum.extend([
+        missing_enum_values_pb2.TestEnumValues.ZERO,
+        missing_enum_values_pb2.TestEnumValues.ONE,
+        ])
+    self.message_data = self.message.SerializeToString()
+    self.missing_message = missing_enum_values_pb2.TestMissingEnumValues()
+    self.missing_message.ParseFromString(self.message_data)
+
+  # CheckUnknownField() is an additional Pure Python check which checks
+  # a detail of unknown fields. It cannot be used by the C++
+  # implementation because some protect members are called.
+  # The test is added for historical reasons. It is not necessary as
+  # serialized string is checked.
+
+  def CheckUnknownField(self, name, expected_value):
+    field_descriptor = self.descriptor.fields_by_name[name]
+    unknown_fields = self.missing_message.UnknownFields()
+    count = 0
+    for field in unknown_fields:
+      if field.field_number == field_descriptor.number:
+        count += 1
+        if field_descriptor.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+          self.assertIn(field.data, expected_value)
+        else:
+          self.assertEqual(expected_value, field.data)
+    if field_descriptor.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+      self.assertEqual(count, len(expected_value))
+    else:
+      self.assertEqual(count, 1)
+
+  def testUnknownParseMismatchEnumValue(self):
+    just_string = missing_enum_values_pb2.JustString()
+    just_string.dummy = 'blah'
+
+    missing = missing_enum_values_pb2.TestEnumValues()
+    # The parse is invalid, storing the string proto into the set of
+    # unknown fields.
+    missing.ParseFromString(just_string.SerializeToString())
+
+    # Fetching the enum field shouldn't crash, instead returning the
+    # default value.
+    self.assertEqual(missing.optional_nested_enum, 0)
+
+  def testUnknownEnumValue(self):
+    self.assertFalse(self.missing_message.HasField('optional_nested_enum'))
+    self.assertEqual(self.missing_message.optional_nested_enum, 2)
+    # Clear does not do anything.
+    serialized = self.missing_message.SerializeToString()
+    self.missing_message.ClearField('optional_nested_enum')
+    self.assertEqual(self.missing_message.SerializeToString(), serialized)
+
+  def testUnknownRepeatedEnumValue(self):
+    self.assertEqual([], self.missing_message.repeated_nested_enum)
+
+  def testUnknownPackedEnumValue(self):
+    self.assertEqual([], self.missing_message.packed_nested_enum)
+
+  def testCheckUnknownFieldValueForEnum(self):
+    unknown_fields = self.missing_message.UnknownFields()
+    self.assertEqual(len(unknown_fields), 5)
+    self.CheckUnknownField('optional_nested_enum',
+                           self.message.optional_nested_enum)
+    self.CheckUnknownField('repeated_nested_enum',
+                           self.message.repeated_nested_enum)
+    self.CheckUnknownField('packed_nested_enum',
+                           self.message.packed_nested_enum)
+
+  def testRoundTrip(self):
+    new_message = missing_enum_values_pb2.TestEnumValues()
+    new_message.ParseFromString(self.missing_message.SerializeToString())
+    self.assertEqual(self.message, new_message)
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/well_known_types.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/well_known_types.py
new file mode 100644
index 0000000..cb646a7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/well_known_types.py
@@ -0,0 +1,863 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Contains well known classes.
+
+This files defines well known classes which need extra maintenance including:
+  - Any
+  - Duration
+  - FieldMask
+  - Struct
+  - Timestamp
+"""
+
+__author__ = 'jieluo@google.com (Jie Luo)'
+
+import calendar
+from datetime import datetime
+from datetime import timedelta
+import six
+
+try:
+  # Since python 3
+  import collections.abc as collections_abc
+except ImportError:
+  # Won't work after python 3.8
+  import collections as collections_abc
+
+from google.protobuf.descriptor import FieldDescriptor
+
+_TIMESTAMPFOMAT = '%Y-%m-%dT%H:%M:%S'
+_NANOS_PER_SECOND = 1000000000
+_NANOS_PER_MILLISECOND = 1000000
+_NANOS_PER_MICROSECOND = 1000
+_MILLIS_PER_SECOND = 1000
+_MICROS_PER_SECOND = 1000000
+_SECONDS_PER_DAY = 24 * 3600
+_DURATION_SECONDS_MAX = 315576000000
+
+
+class Any(object):
+  """Class for Any Message type."""
+
+  __slots__ = ()
+
+  def Pack(self, msg, type_url_prefix='type.googleapis.com/',
+           deterministic=None):
+    """Packs the specified message into current Any message."""
+    if len(type_url_prefix) < 1 or type_url_prefix[-1] != '/':
+      self.type_url = '%s/%s' % (type_url_prefix, msg.DESCRIPTOR.full_name)
+    else:
+      self.type_url = '%s%s' % (type_url_prefix, msg.DESCRIPTOR.full_name)
+    self.value = msg.SerializeToString(deterministic=deterministic)
+
+  def Unpack(self, msg):
+    """Unpacks the current Any message into specified message."""
+    descriptor = msg.DESCRIPTOR
+    if not self.Is(descriptor):
+      return False
+    msg.ParseFromString(self.value)
+    return True
+
+  def TypeName(self):
+    """Returns the protobuf type name of the inner message."""
+    # Only last part is to be used: b/25630112
+    return self.type_url.split('/')[-1]
+
+  def Is(self, descriptor):
+    """Checks if this Any represents the given protobuf type."""
+    return '/' in self.type_url and self.TypeName() == descriptor.full_name
+
+
+_EPOCH_DATETIME = datetime.utcfromtimestamp(0)
+
+
+class Timestamp(object):
+  """Class for Timestamp message type."""
+
+  __slots__ = ()
+
+  def ToJsonString(self):
+    """Converts Timestamp to RFC 3339 date string format.
+
+    Returns:
+      A string converted from timestamp. The string is always Z-normalized
+      and uses 3, 6 or 9 fractional digits as required to represent the
+      exact time. Example of the return format: '1972-01-01T10:00:20.021Z'
+    """
+    nanos = self.nanos % _NANOS_PER_SECOND
+    total_sec = self.seconds + (self.nanos - nanos) // _NANOS_PER_SECOND
+    seconds = total_sec % _SECONDS_PER_DAY
+    days = (total_sec - seconds) // _SECONDS_PER_DAY
+    dt = datetime(1970, 1, 1) + timedelta(days, seconds)
+
+    result = dt.isoformat()
+    if (nanos % 1e9) == 0:
+      # If there are 0 fractional digits, the fractional
+      # point '.' should be omitted when serializing.
+      return result + 'Z'
+    if (nanos % 1e6) == 0:
+      # Serialize 3 fractional digits.
+      return result + '.%03dZ' % (nanos / 1e6)
+    if (nanos % 1e3) == 0:
+      # Serialize 6 fractional digits.
+      return result + '.%06dZ' % (nanos / 1e3)
+    # Serialize 9 fractional digits.
+    return result + '.%09dZ' % nanos
+
+  def FromJsonString(self, value):
+    """Parse a RFC 3339 date string format to Timestamp.
+
+    Args:
+      value: A date string. Any fractional digits (or none) and any offset are
+          accepted as long as they fit into nano-seconds precision.
+          Example of accepted format: '1972-01-01T10:00:20.021-05:00'
+
+    Raises:
+      ValueError: On parsing problems.
+    """
+    timezone_offset = value.find('Z')
+    if timezone_offset == -1:
+      timezone_offset = value.find('+')
+    if timezone_offset == -1:
+      timezone_offset = value.rfind('-')
+    if timezone_offset == -1:
+      raise ValueError(
+          'Failed to parse timestamp: missing valid timezone offset.')
+    time_value = value[0:timezone_offset]
+    # Parse datetime and nanos.
+    point_position = time_value.find('.')
+    if point_position == -1:
+      second_value = time_value
+      nano_value = ''
+    else:
+      second_value = time_value[:point_position]
+      nano_value = time_value[point_position + 1:]
+    if 't' in second_value:
+      raise ValueError(
+          'time data \'{0}\' does not match format \'%Y-%m-%dT%H:%M:%S\', '
+          'lowercase \'t\' is not accepted'.format(second_value))
+    date_object = datetime.strptime(second_value, _TIMESTAMPFOMAT)
+    td = date_object - datetime(1970, 1, 1)
+    seconds = td.seconds + td.days * _SECONDS_PER_DAY
+    if len(nano_value) > 9:
+      raise ValueError(
+          'Failed to parse Timestamp: nanos {0} more than '
+          '9 fractional digits.'.format(nano_value))
+    if nano_value:
+      nanos = round(float('0.' + nano_value) * 1e9)
+    else:
+      nanos = 0
+    # Parse timezone offsets.
+    if value[timezone_offset] == 'Z':
+      if len(value) != timezone_offset + 1:
+        raise ValueError('Failed to parse timestamp: invalid trailing'
+                         ' data {0}.'.format(value))
+    else:
+      timezone = value[timezone_offset:]
+      pos = timezone.find(':')
+      if pos == -1:
+        raise ValueError(
+            'Invalid timezone offset value: {0}.'.format(timezone))
+      if timezone[0] == '+':
+        seconds -= (int(timezone[1:pos])*60+int(timezone[pos+1:]))*60
+      else:
+        seconds += (int(timezone[1:pos])*60+int(timezone[pos+1:]))*60
+    # Set seconds and nanos
+    self.seconds = int(seconds)
+    self.nanos = int(nanos)
+
+  def GetCurrentTime(self):
+    """Get the current UTC into Timestamp."""
+    self.FromDatetime(datetime.utcnow())
+
+  def ToNanoseconds(self):
+    """Converts Timestamp to nanoseconds since epoch."""
+    return self.seconds * _NANOS_PER_SECOND + self.nanos
+
+  def ToMicroseconds(self):
+    """Converts Timestamp to microseconds since epoch."""
+    return (self.seconds * _MICROS_PER_SECOND +
+            self.nanos // _NANOS_PER_MICROSECOND)
+
+  def ToMilliseconds(self):
+    """Converts Timestamp to milliseconds since epoch."""
+    return (self.seconds * _MILLIS_PER_SECOND +
+            self.nanos // _NANOS_PER_MILLISECOND)
+
+  def ToSeconds(self):
+    """Converts Timestamp to seconds since epoch."""
+    return self.seconds
+
+  def FromNanoseconds(self, nanos):
+    """Converts nanoseconds since epoch to Timestamp."""
+    self.seconds = nanos // _NANOS_PER_SECOND
+    self.nanos = nanos % _NANOS_PER_SECOND
+
+  def FromMicroseconds(self, micros):
+    """Converts microseconds since epoch to Timestamp."""
+    self.seconds = micros // _MICROS_PER_SECOND
+    self.nanos = (micros % _MICROS_PER_SECOND) * _NANOS_PER_MICROSECOND
+
+  def FromMilliseconds(self, millis):
+    """Converts milliseconds since epoch to Timestamp."""
+    self.seconds = millis // _MILLIS_PER_SECOND
+    self.nanos = (millis % _MILLIS_PER_SECOND) * _NANOS_PER_MILLISECOND
+
+  def FromSeconds(self, seconds):
+    """Converts seconds since epoch to Timestamp."""
+    self.seconds = seconds
+    self.nanos = 0
+
+  def ToDatetime(self):
+    """Converts Timestamp to datetime."""
+    return _EPOCH_DATETIME + timedelta(
+        seconds=self.seconds, microseconds=_RoundTowardZero(
+            self.nanos, _NANOS_PER_MICROSECOND))
+
+  def FromDatetime(self, dt):
+    """Converts datetime to Timestamp."""
+    # Using this guide: http://wiki.python.org/moin/WorkingWithTime
+    # And this conversion guide: http://docs.python.org/library/time.html
+
+    # Turn the date parameter into a tuple (struct_time) that can then be
+    # manipulated into a long value of seconds.  During the conversion from
+    # struct_time to long, the source date in UTC, and so it follows that the
+    # correct transformation is calendar.timegm()
+    self.seconds = calendar.timegm(dt.utctimetuple())
+    self.nanos = dt.microsecond * _NANOS_PER_MICROSECOND
+
+
+class Duration(object):
+  """Class for Duration message type."""
+
+  __slots__ = ()
+
+  def ToJsonString(self):
+    """Converts Duration to string format.
+
+    Returns:
+      A string converted from self. The string format will contains
+      3, 6, or 9 fractional digits depending on the precision required to
+      represent the exact Duration value. For example: "1s", "1.010s",
+      "1.000000100s", "-3.100s"
+    """
+    _CheckDurationValid(self.seconds, self.nanos)
+    if self.seconds < 0 or self.nanos < 0:
+      result = '-'
+      seconds = - self.seconds + int((0 - self.nanos) // 1e9)
+      nanos = (0 - self.nanos) % 1e9
+    else:
+      result = ''
+      seconds = self.seconds + int(self.nanos // 1e9)
+      nanos = self.nanos % 1e9
+    result += '%d' % seconds
+    if (nanos % 1e9) == 0:
+      # If there are 0 fractional digits, the fractional
+      # point '.' should be omitted when serializing.
+      return result + 's'
+    if (nanos % 1e6) == 0:
+      # Serialize 3 fractional digits.
+      return result + '.%03ds' % (nanos / 1e6)
+    if (nanos % 1e3) == 0:
+      # Serialize 6 fractional digits.
+      return result + '.%06ds' % (nanos / 1e3)
+    # Serialize 9 fractional digits.
+    return result + '.%09ds' % nanos
+
+  def FromJsonString(self, value):
+    """Converts a string to Duration.
+
+    Args:
+      value: A string to be converted. The string must end with 's'. Any
+          fractional digits (or none) are accepted as long as they fit into
+          precision. For example: "1s", "1.01s", "1.0000001s", "-3.100s
+
+    Raises:
+      ValueError: On parsing problems.
+    """
+    if len(value) < 1 or value[-1] != 's':
+      raise ValueError(
+          'Duration must end with letter "s": {0}.'.format(value))
+    try:
+      pos = value.find('.')
+      if pos == -1:
+        seconds = int(value[:-1])
+        nanos = 0
+      else:
+        seconds = int(value[:pos])
+        if value[0] == '-':
+          nanos = int(round(float('-0{0}'.format(value[pos: -1])) *1e9))
+        else:
+          nanos = int(round(float('0{0}'.format(value[pos: -1])) *1e9))
+      _CheckDurationValid(seconds, nanos)
+      self.seconds = seconds
+      self.nanos = nanos
+    except ValueError as e:
+      raise ValueError(
+          'Couldn\'t parse duration: {0} : {1}.'.format(value, e))
+
+  def ToNanoseconds(self):
+    """Converts a Duration to nanoseconds."""
+    return self.seconds * _NANOS_PER_SECOND + self.nanos
+
+  def ToMicroseconds(self):
+    """Converts a Duration to microseconds."""
+    micros = _RoundTowardZero(self.nanos, _NANOS_PER_MICROSECOND)
+    return self.seconds * _MICROS_PER_SECOND + micros
+
+  def ToMilliseconds(self):
+    """Converts a Duration to milliseconds."""
+    millis = _RoundTowardZero(self.nanos, _NANOS_PER_MILLISECOND)
+    return self.seconds * _MILLIS_PER_SECOND + millis
+
+  def ToSeconds(self):
+    """Converts a Duration to seconds."""
+    return self.seconds
+
+  def FromNanoseconds(self, nanos):
+    """Converts nanoseconds to Duration."""
+    self._NormalizeDuration(nanos // _NANOS_PER_SECOND,
+                            nanos % _NANOS_PER_SECOND)
+
+  def FromMicroseconds(self, micros):
+    """Converts microseconds to Duration."""
+    self._NormalizeDuration(
+        micros // _MICROS_PER_SECOND,
+        (micros % _MICROS_PER_SECOND) * _NANOS_PER_MICROSECOND)
+
+  def FromMilliseconds(self, millis):
+    """Converts milliseconds to Duration."""
+    self._NormalizeDuration(
+        millis // _MILLIS_PER_SECOND,
+        (millis % _MILLIS_PER_SECOND) * _NANOS_PER_MILLISECOND)
+
+  def FromSeconds(self, seconds):
+    """Converts seconds to Duration."""
+    self.seconds = seconds
+    self.nanos = 0
+
+  def ToTimedelta(self):
+    """Converts Duration to timedelta."""
+    return timedelta(
+        seconds=self.seconds, microseconds=_RoundTowardZero(
+            self.nanos, _NANOS_PER_MICROSECOND))
+
+  def FromTimedelta(self, td):
+    """Converts timedelta to Duration."""
+    self._NormalizeDuration(td.seconds + td.days * _SECONDS_PER_DAY,
+                            td.microseconds * _NANOS_PER_MICROSECOND)
+
+  def _NormalizeDuration(self, seconds, nanos):
+    """Set Duration by seconds and nanos."""
+    # Force nanos to be negative if the duration is negative.
+    if seconds < 0 and nanos > 0:
+      seconds += 1
+      nanos -= _NANOS_PER_SECOND
+    self.seconds = seconds
+    self.nanos = nanos
+
+
+def _CheckDurationValid(seconds, nanos):
+  if seconds < -_DURATION_SECONDS_MAX or seconds > _DURATION_SECONDS_MAX:
+    raise ValueError(
+        'Duration is not valid: Seconds {0} must be in range '
+        '[-315576000000, 315576000000].'.format(seconds))
+  if nanos <= -_NANOS_PER_SECOND or nanos >= _NANOS_PER_SECOND:
+    raise ValueError(
+        'Duration is not valid: Nanos {0} must be in range '
+        '[-999999999, 999999999].'.format(nanos))
+  if (nanos < 0 and seconds > 0) or (nanos > 0 and seconds < 0):
+    raise ValueError(
+        'Duration is not valid: Sign mismatch.')
+
+
+def _RoundTowardZero(value, divider):
+  """Truncates the remainder part after division."""
+  # For some languanges, the sign of the remainder is implementation
+  # dependent if any of the operands is negative. Here we enforce
+  # "rounded toward zero" semantics. For example, for (-5) / 2 an
+  # implementation may give -3 as the result with the remainder being
+  # 1. This function ensures we always return -2 (closer to zero).
+  result = value // divider
+  remainder = value % divider
+  if result < 0 and remainder > 0:
+    return result + 1
+  else:
+    return result
+
+
+class FieldMask(object):
+  """Class for FieldMask message type."""
+
+  __slots__ = ()
+
+  def ToJsonString(self):
+    """Converts FieldMask to string according to proto3 JSON spec."""
+    camelcase_paths = []
+    for path in self.paths:
+      camelcase_paths.append(_SnakeCaseToCamelCase(path))
+    return ','.join(camelcase_paths)
+
+  def FromJsonString(self, value):
+    """Converts string to FieldMask according to proto3 JSON spec."""
+    self.Clear()
+    if value:
+      for path in value.split(','):
+        self.paths.append(_CamelCaseToSnakeCase(path))
+
+  def IsValidForDescriptor(self, message_descriptor):
+    """Checks whether the FieldMask is valid for Message Descriptor."""
+    for path in self.paths:
+      if not _IsValidPath(message_descriptor, path):
+        return False
+    return True
+
+  def AllFieldsFromDescriptor(self, message_descriptor):
+    """Gets all direct fields of Message Descriptor to FieldMask."""
+    self.Clear()
+    for field in message_descriptor.fields:
+      self.paths.append(field.name)
+
+  def CanonicalFormFromMask(self, mask):
+    """Converts a FieldMask to the canonical form.
+
+    Removes paths that are covered by another path. For example,
+    "foo.bar" is covered by "foo" and will be removed if "foo"
+    is also in the FieldMask. Then sorts all paths in alphabetical order.
+
+    Args:
+      mask: The original FieldMask to be converted.
+    """
+    tree = _FieldMaskTree(mask)
+    tree.ToFieldMask(self)
+
+  def Union(self, mask1, mask2):
+    """Merges mask1 and mask2 into this FieldMask."""
+    _CheckFieldMaskMessage(mask1)
+    _CheckFieldMaskMessage(mask2)
+    tree = _FieldMaskTree(mask1)
+    tree.MergeFromFieldMask(mask2)
+    tree.ToFieldMask(self)
+
+  def Intersect(self, mask1, mask2):
+    """Intersects mask1 and mask2 into this FieldMask."""
+    _CheckFieldMaskMessage(mask1)
+    _CheckFieldMaskMessage(mask2)
+    tree = _FieldMaskTree(mask1)
+    intersection = _FieldMaskTree()
+    for path in mask2.paths:
+      tree.IntersectPath(path, intersection)
+    intersection.ToFieldMask(self)
+
+  def MergeMessage(
+      self, source, destination,
+      replace_message_field=False, replace_repeated_field=False):
+    """Merges fields specified in FieldMask from source to destination.
+
+    Args:
+      source: Source message.
+      destination: The destination message to be merged into.
+      replace_message_field: Replace message field if True. Merge message
+          field if False.
+      replace_repeated_field: Replace repeated field if True. Append
+          elements of repeated field if False.
+    """
+    tree = _FieldMaskTree(self)
+    tree.MergeMessage(
+        source, destination, replace_message_field, replace_repeated_field)
+
+
+def _IsValidPath(message_descriptor, path):
+  """Checks whether the path is valid for Message Descriptor."""
+  parts = path.split('.')
+  last = parts.pop()
+  for name in parts:
+    field = message_descriptor.fields_by_name.get(name)
+    if (field is None or
+        field.label == FieldDescriptor.LABEL_REPEATED or
+        field.type != FieldDescriptor.TYPE_MESSAGE):
+      return False
+    message_descriptor = field.message_type
+  return last in message_descriptor.fields_by_name
+
+
+def _CheckFieldMaskMessage(message):
+  """Raises ValueError if message is not a FieldMask."""
+  message_descriptor = message.DESCRIPTOR
+  if (message_descriptor.name != 'FieldMask' or
+      message_descriptor.file.name != 'google/protobuf/field_mask.proto'):
+    raise ValueError('Message {0} is not a FieldMask.'.format(
+        message_descriptor.full_name))
+
+
+def _SnakeCaseToCamelCase(path_name):
+  """Converts a path name from snake_case to camelCase."""
+  result = []
+  after_underscore = False
+  for c in path_name:
+    if c.isupper():
+      raise ValueError(
+          'Fail to print FieldMask to Json string: Path name '
+          '{0} must not contain uppercase letters.'.format(path_name))
+    if after_underscore:
+      if c.islower():
+        result.append(c.upper())
+        after_underscore = False
+      else:
+        raise ValueError(
+            'Fail to print FieldMask to Json string: The '
+            'character after a "_" must be a lowercase letter '
+            'in path name {0}.'.format(path_name))
+    elif c == '_':
+      after_underscore = True
+    else:
+      result += c
+
+  if after_underscore:
+    raise ValueError('Fail to print FieldMask to Json string: Trailing "_" '
+                     'in path name {0}.'.format(path_name))
+  return ''.join(result)
+
+
+def _CamelCaseToSnakeCase(path_name):
+  """Converts a field name from camelCase to snake_case."""
+  result = []
+  for c in path_name:
+    if c == '_':
+      raise ValueError('Fail to parse FieldMask: Path name '
+                       '{0} must not contain "_"s.'.format(path_name))
+    if c.isupper():
+      result += '_'
+      result += c.lower()
+    else:
+      result += c
+  return ''.join(result)
+
+
+class _FieldMaskTree(object):
+  """Represents a FieldMask in a tree structure.
+
+  For example, given a FieldMask "foo.bar,foo.baz,bar.baz",
+  the FieldMaskTree will be:
+      [_root] -+- foo -+- bar
+            |       |
+            |       +- baz
+            |
+            +- bar --- baz
+  In the tree, each leaf node represents a field path.
+  """
+
+  __slots__ = ('_root',)
+
+  def __init__(self, field_mask=None):
+    """Initializes the tree by FieldMask."""
+    self._root = {}
+    if field_mask:
+      self.MergeFromFieldMask(field_mask)
+
+  def MergeFromFieldMask(self, field_mask):
+    """Merges a FieldMask to the tree."""
+    for path in field_mask.paths:
+      self.AddPath(path)
+
+  def AddPath(self, path):
+    """Adds a field path into the tree.
+
+    If the field path to add is a sub-path of an existing field path
+    in the tree (i.e., a leaf node), it means the tree already matches
+    the given path so nothing will be added to the tree. If the path
+    matches an existing non-leaf node in the tree, that non-leaf node
+    will be turned into a leaf node with all its children removed because
+    the path matches all the node's children. Otherwise, a new path will
+    be added.
+
+    Args:
+      path: The field path to add.
+    """
+    node = self._root
+    for name in path.split('.'):
+      if name not in node:
+        node[name] = {}
+      elif not node[name]:
+        # Pre-existing empty node implies we already have this entire tree.
+        return
+      node = node[name]
+    # Remove any sub-trees we might have had.
+    node.clear()
+
+  def ToFieldMask(self, field_mask):
+    """Converts the tree to a FieldMask."""
+    field_mask.Clear()
+    _AddFieldPaths(self._root, '', field_mask)
+
+  def IntersectPath(self, path, intersection):
+    """Calculates the intersection part of a field path with this tree.
+
+    Args:
+      path: The field path to calculates.
+      intersection: The out tree to record the intersection part.
+    """
+    node = self._root
+    for name in path.split('.'):
+      if name not in node:
+        return
+      elif not node[name]:
+        intersection.AddPath(path)
+        return
+      node = node[name]
+    intersection.AddLeafNodes(path, node)
+
+  def AddLeafNodes(self, prefix, node):
+    """Adds leaf nodes begin with prefix to this tree."""
+    if not node:
+      self.AddPath(prefix)
+    for name in node:
+      child_path = prefix + '.' + name
+      self.AddLeafNodes(child_path, node[name])
+
+  def MergeMessage(
+      self, source, destination,
+      replace_message, replace_repeated):
+    """Merge all fields specified by this tree from source to destination."""
+    _MergeMessage(
+        self._root, source, destination, replace_message, replace_repeated)
+
+
+def _StrConvert(value):
+  """Converts value to str if it is not."""
+  # This file is imported by c extension and some methods like ClearField
+  # requires string for the field name. py2/py3 has different text
+  # type and may use unicode.
+  if not isinstance(value, str):
+    return value.encode('utf-8')
+  return value
+
+
+def _MergeMessage(
+    node, source, destination, replace_message, replace_repeated):
+  """Merge all fields specified by a sub-tree from source to destination."""
+  source_descriptor = source.DESCRIPTOR
+  for name in node:
+    child = node[name]
+    field = source_descriptor.fields_by_name[name]
+    if field is None:
+      raise ValueError('Error: Can\'t find field {0} in message {1}.'.format(
+          name, source_descriptor.full_name))
+    if child:
+      # Sub-paths are only allowed for singular message fields.
+      if (field.label == FieldDescriptor.LABEL_REPEATED or
+          field.cpp_type != FieldDescriptor.CPPTYPE_MESSAGE):
+        raise ValueError('Error: Field {0} in message {1} is not a singular '
+                         'message field and cannot have sub-fields.'.format(
+                             name, source_descriptor.full_name))
+      if source.HasField(name):
+        _MergeMessage(
+            child, getattr(source, name), getattr(destination, name),
+            replace_message, replace_repeated)
+      continue
+    if field.label == FieldDescriptor.LABEL_REPEATED:
+      if replace_repeated:
+        destination.ClearField(_StrConvert(name))
+      repeated_source = getattr(source, name)
+      repeated_destination = getattr(destination, name)
+      repeated_destination.MergeFrom(repeated_source)
+    else:
+      if field.cpp_type == FieldDescriptor.CPPTYPE_MESSAGE:
+        if replace_message:
+          destination.ClearField(_StrConvert(name))
+        if source.HasField(name):
+          getattr(destination, name).MergeFrom(getattr(source, name))
+      else:
+        setattr(destination, name, getattr(source, name))
+
+
+def _AddFieldPaths(node, prefix, field_mask):
+  """Adds the field paths descended from node to field_mask."""
+  if not node and prefix:
+    field_mask.paths.append(prefix)
+    return
+  for name in sorted(node):
+    if prefix:
+      child_path = prefix + '.' + name
+    else:
+      child_path = name
+    _AddFieldPaths(node[name], child_path, field_mask)
+
+
+_INT_OR_FLOAT = six.integer_types + (float,)
+
+
+def _SetStructValue(struct_value, value):
+  if value is None:
+    struct_value.null_value = 0
+  elif isinstance(value, bool):
+    # Note: this check must come before the number check because in Python
+    # True and False are also considered numbers.
+    struct_value.bool_value = value
+  elif isinstance(value, six.string_types):
+    struct_value.string_value = value
+  elif isinstance(value, _INT_OR_FLOAT):
+    struct_value.number_value = value
+  elif isinstance(value, (dict, Struct)):
+    struct_value.struct_value.Clear()
+    struct_value.struct_value.update(value)
+  elif isinstance(value, (list, ListValue)):
+    struct_value.list_value.Clear()
+    struct_value.list_value.extend(value)
+  else:
+    raise ValueError('Unexpected type')
+
+
+def _GetStructValue(struct_value):
+  which = struct_value.WhichOneof('kind')
+  if which == 'struct_value':
+    return struct_value.struct_value
+  elif which == 'null_value':
+    return None
+  elif which == 'number_value':
+    return struct_value.number_value
+  elif which == 'string_value':
+    return struct_value.string_value
+  elif which == 'bool_value':
+    return struct_value.bool_value
+  elif which == 'list_value':
+    return struct_value.list_value
+  elif which is None:
+    raise ValueError('Value not set')
+
+
+class Struct(object):
+  """Class for Struct message type."""
+
+  __slots__ = ()
+
+  def __getitem__(self, key):
+    return _GetStructValue(self.fields[key])
+
+  def __contains__(self, item):
+    return item in self.fields
+
+  def __setitem__(self, key, value):
+    _SetStructValue(self.fields[key], value)
+
+  def __delitem__(self, key):
+    del self.fields[key]
+
+  def __len__(self):
+    return len(self.fields)
+
+  def __iter__(self):
+    return iter(self.fields)
+
+  def keys(self):  # pylint: disable=invalid-name
+    return self.fields.keys()
+
+  def values(self):  # pylint: disable=invalid-name
+    return [self[key] for key in self]
+
+  def items(self):  # pylint: disable=invalid-name
+    return [(key, self[key]) for key in self]
+
+  def get_or_create_list(self, key):
+    """Returns a list for this key, creating if it didn't exist already."""
+    if not self.fields[key].HasField('list_value'):
+      # Clear will mark list_value modified which will indeed create a list.
+      self.fields[key].list_value.Clear()
+    return self.fields[key].list_value
+
+  def get_or_create_struct(self, key):
+    """Returns a struct for this key, creating if it didn't exist already."""
+    if not self.fields[key].HasField('struct_value'):
+      # Clear will mark struct_value modified which will indeed create a struct.
+      self.fields[key].struct_value.Clear()
+    return self.fields[key].struct_value
+
+  def update(self, dictionary):  # pylint: disable=invalid-name
+    for key, value in dictionary.items():
+      _SetStructValue(self.fields[key], value)
+
+collections_abc.MutableMapping.register(Struct)
+
+
+class ListValue(object):
+  """Class for ListValue message type."""
+
+  __slots__ = ()
+
+  def __len__(self):
+    return len(self.values)
+
+  def append(self, value):
+    _SetStructValue(self.values.add(), value)
+
+  def extend(self, elem_seq):
+    for value in elem_seq:
+      self.append(value)
+
+  def __getitem__(self, index):
+    """Retrieves item by the specified index."""
+    return _GetStructValue(self.values.__getitem__(index))
+
+  def __setitem__(self, index, value):
+    _SetStructValue(self.values.__getitem__(index), value)
+
+  def __delitem__(self, key):
+    del self.values[key]
+
+  def items(self):
+    for i in range(len(self)):
+      yield self[i]
+
+  def add_struct(self):
+    """Appends and returns a struct value as the next value in the list."""
+    struct_value = self.values.add().struct_value
+    # Clear will mark struct_value modified which will indeed create a struct.
+    struct_value.Clear()
+    return struct_value
+
+  def add_list(self):
+    """Appends and returns a list value as the next value in the list."""
+    list_value = self.values.add().list_value
+    # Clear will mark list_value modified which will indeed create a list.
+    list_value.Clear()
+    return list_value
+
+collections_abc.MutableSequence.register(ListValue)
+
+
+WKTBASES = {
+    'google.protobuf.Any': Any,
+    'google.protobuf.Duration': Duration,
+    'google.protobuf.FieldMask': FieldMask,
+    'google.protobuf.ListValue': ListValue,
+    'google.protobuf.Struct': Struct,
+    'google.protobuf.Timestamp': Timestamp,
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/well_known_types_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/well_known_types_test.py
new file mode 100644
index 0000000..8089f03
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/well_known_types_test.py
@@ -0,0 +1,1017 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Test for google.protobuf.internal.well_known_types."""
+
+__author__ = 'jieluo@google.com (Jie Luo)'
+
+import datetime
+
+try:
+  # Since python 3
+  import collections.abc as collections_abc
+except ImportError:
+  # Won't work after python 3.8
+  import collections as collections_abc
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import any_pb2
+from google.protobuf import duration_pb2
+from google.protobuf import field_mask_pb2
+from google.protobuf import struct_pb2
+from google.protobuf import timestamp_pb2
+from google.protobuf import map_unittest_pb2
+from google.protobuf import unittest_pb2
+from google.protobuf.internal import any_test_pb2
+from google.protobuf.internal import test_util
+from google.protobuf.internal import well_known_types
+from google.protobuf import descriptor
+from google.protobuf import text_format
+
+
+class TimeUtilTestBase(unittest.TestCase):
+
+  def CheckTimestampConversion(self, message, text):
+    self.assertEqual(text, message.ToJsonString())
+    parsed_message = timestamp_pb2.Timestamp()
+    parsed_message.FromJsonString(text)
+    self.assertEqual(message, parsed_message)
+
+  def CheckDurationConversion(self, message, text):
+    self.assertEqual(text, message.ToJsonString())
+    parsed_message = duration_pb2.Duration()
+    parsed_message.FromJsonString(text)
+    self.assertEqual(message, parsed_message)
+
+
+class TimeUtilTest(TimeUtilTestBase):
+
+  def testTimestampSerializeAndParse(self):
+    message = timestamp_pb2.Timestamp()
+    # Generated output should contain 3, 6, or 9 fractional digits.
+    message.seconds = 0
+    message.nanos = 0
+    self.CheckTimestampConversion(message, '1970-01-01T00:00:00Z')
+    message.nanos = 10000000
+    self.CheckTimestampConversion(message, '1970-01-01T00:00:00.010Z')
+    message.nanos = 10000
+    self.CheckTimestampConversion(message, '1970-01-01T00:00:00.000010Z')
+    message.nanos = 10
+    self.CheckTimestampConversion(message, '1970-01-01T00:00:00.000000010Z')
+    # Test min timestamps.
+    message.seconds = -62135596800
+    message.nanos = 0
+    self.CheckTimestampConversion(message, '0001-01-01T00:00:00Z')
+    # Test max timestamps.
+    message.seconds = 253402300799
+    message.nanos = 999999999
+    self.CheckTimestampConversion(message, '9999-12-31T23:59:59.999999999Z')
+    # Test negative timestamps.
+    message.seconds = -1
+    self.CheckTimestampConversion(message, '1969-12-31T23:59:59.999999999Z')
+
+    # Parsing accepts an fractional digits as long as they fit into nano
+    # precision.
+    message.FromJsonString('1970-01-01T00:00:00.1Z')
+    self.assertEqual(0, message.seconds)
+    self.assertEqual(100000000, message.nanos)
+    # Parsing accepts offsets.
+    message.FromJsonString('1970-01-01T00:00:00-08:00')
+    self.assertEqual(8 * 3600, message.seconds)
+    self.assertEqual(0, message.nanos)
+
+    # It is not easy to check with current time. For test coverage only.
+    message.GetCurrentTime()
+    self.assertNotEqual(8 * 3600, message.seconds)
+
+  def testDurationSerializeAndParse(self):
+    message = duration_pb2.Duration()
+    # Generated output should contain 3, 6, or 9 fractional digits.
+    message.seconds = 0
+    message.nanos = 0
+    self.CheckDurationConversion(message, '0s')
+    message.nanos = 10000000
+    self.CheckDurationConversion(message, '0.010s')
+    message.nanos = 10000
+    self.CheckDurationConversion(message, '0.000010s')
+    message.nanos = 10
+    self.CheckDurationConversion(message, '0.000000010s')
+
+    # Test min and max
+    message.seconds = 315576000000
+    message.nanos = 999999999
+    self.CheckDurationConversion(message, '315576000000.999999999s')
+    message.seconds = -315576000000
+    message.nanos = -999999999
+    self.CheckDurationConversion(message, '-315576000000.999999999s')
+
+    # Parsing accepts an fractional digits as long as they fit into nano
+    # precision.
+    message.FromJsonString('0.1s')
+    self.assertEqual(100000000, message.nanos)
+    message.FromJsonString('0.0000001s')
+    self.assertEqual(100, message.nanos)
+
+  def testTimestampIntegerConversion(self):
+    message = timestamp_pb2.Timestamp()
+    message.FromNanoseconds(1)
+    self.assertEqual('1970-01-01T00:00:00.000000001Z',
+                     message.ToJsonString())
+    self.assertEqual(1, message.ToNanoseconds())
+
+    message.FromNanoseconds(-1)
+    self.assertEqual('1969-12-31T23:59:59.999999999Z',
+                     message.ToJsonString())
+    self.assertEqual(-1, message.ToNanoseconds())
+
+    message.FromMicroseconds(1)
+    self.assertEqual('1970-01-01T00:00:00.000001Z',
+                     message.ToJsonString())
+    self.assertEqual(1, message.ToMicroseconds())
+
+    message.FromMicroseconds(-1)
+    self.assertEqual('1969-12-31T23:59:59.999999Z',
+                     message.ToJsonString())
+    self.assertEqual(-1, message.ToMicroseconds())
+
+    message.FromMilliseconds(1)
+    self.assertEqual('1970-01-01T00:00:00.001Z',
+                     message.ToJsonString())
+    self.assertEqual(1, message.ToMilliseconds())
+
+    message.FromMilliseconds(-1)
+    self.assertEqual('1969-12-31T23:59:59.999Z',
+                     message.ToJsonString())
+    self.assertEqual(-1, message.ToMilliseconds())
+
+    message.FromSeconds(1)
+    self.assertEqual('1970-01-01T00:00:01Z',
+                     message.ToJsonString())
+    self.assertEqual(1, message.ToSeconds())
+
+    message.FromSeconds(-1)
+    self.assertEqual('1969-12-31T23:59:59Z',
+                     message.ToJsonString())
+    self.assertEqual(-1, message.ToSeconds())
+
+    message.FromNanoseconds(1999)
+    self.assertEqual(1, message.ToMicroseconds())
+    # For negative values, Timestamp will be rounded down.
+    # For example, "1969-12-31T23:59:59.5Z" (i.e., -0.5s) rounded to seconds
+    # will be "1969-12-31T23:59:59Z" (i.e., -1s) rather than
+    # "1970-01-01T00:00:00Z" (i.e., 0s).
+    message.FromNanoseconds(-1999)
+    self.assertEqual(-2, message.ToMicroseconds())
+
+  def testDurationIntegerConversion(self):
+    message = duration_pb2.Duration()
+    message.FromNanoseconds(1)
+    self.assertEqual('0.000000001s',
+                     message.ToJsonString())
+    self.assertEqual(1, message.ToNanoseconds())
+
+    message.FromNanoseconds(-1)
+    self.assertEqual('-0.000000001s',
+                     message.ToJsonString())
+    self.assertEqual(-1, message.ToNanoseconds())
+
+    message.FromMicroseconds(1)
+    self.assertEqual('0.000001s',
+                     message.ToJsonString())
+    self.assertEqual(1, message.ToMicroseconds())
+
+    message.FromMicroseconds(-1)
+    self.assertEqual('-0.000001s',
+                     message.ToJsonString())
+    self.assertEqual(-1, message.ToMicroseconds())
+
+    message.FromMilliseconds(1)
+    self.assertEqual('0.001s',
+                     message.ToJsonString())
+    self.assertEqual(1, message.ToMilliseconds())
+
+    message.FromMilliseconds(-1)
+    self.assertEqual('-0.001s',
+                     message.ToJsonString())
+    self.assertEqual(-1, message.ToMilliseconds())
+
+    message.FromSeconds(1)
+    self.assertEqual('1s', message.ToJsonString())
+    self.assertEqual(1, message.ToSeconds())
+
+    message.FromSeconds(-1)
+    self.assertEqual('-1s',
+                     message.ToJsonString())
+    self.assertEqual(-1, message.ToSeconds())
+
+    # Test truncation behavior.
+    message.FromNanoseconds(1999)
+    self.assertEqual(1, message.ToMicroseconds())
+
+    # For negative values, Duration will be rounded towards 0.
+    message.FromNanoseconds(-1999)
+    self.assertEqual(-1, message.ToMicroseconds())
+
+  def testDatetimeConverison(self):
+    message = timestamp_pb2.Timestamp()
+    dt = datetime.datetime(1970, 1, 1)
+    message.FromDatetime(dt)
+    self.assertEqual(dt, message.ToDatetime())
+
+    message.FromMilliseconds(1999)
+    self.assertEqual(datetime.datetime(1970, 1, 1, 0, 0, 1, 999000),
+                     message.ToDatetime())
+
+    dt = datetime.datetime(2555, 2, 22, 1, 2, 3, 456789)
+    message.FromDatetime(dt)
+    self.assertEqual(dt, message.ToDatetime())
+
+    dt = datetime.datetime.max
+    message.FromDatetime(dt)
+    self.assertEqual(dt, message.ToDatetime())
+
+  def testDatetimeConversionWithTimezone(self):
+    class TZ(datetime.tzinfo):
+
+      def utcoffset(self, _):
+        return datetime.timedelta(hours=1)
+
+      def dst(self, _):
+        return datetime.timedelta(0)
+
+      def tzname(self, _):
+        return 'UTC+1'
+
+    message1 = timestamp_pb2.Timestamp()
+    dt = datetime.datetime(1970, 1, 1, 1, tzinfo=TZ())
+    message1.FromDatetime(dt)
+    message2 = timestamp_pb2.Timestamp()
+    dt = datetime.datetime(1970, 1, 1, 0)
+    message2.FromDatetime(dt)
+    self.assertEqual(message1, message2)
+
+  def testTimedeltaConversion(self):
+    message = duration_pb2.Duration()
+    message.FromNanoseconds(1999999999)
+    td = message.ToTimedelta()
+    self.assertEqual(1, td.seconds)
+    self.assertEqual(999999, td.microseconds)
+
+    message.FromNanoseconds(-1999999999)
+    td = message.ToTimedelta()
+    self.assertEqual(-1, td.days)
+    self.assertEqual(86398, td.seconds)
+    self.assertEqual(1, td.microseconds)
+
+    message.FromMicroseconds(-1)
+    td = message.ToTimedelta()
+    self.assertEqual(-1, td.days)
+    self.assertEqual(86399, td.seconds)
+    self.assertEqual(999999, td.microseconds)
+    converted_message = duration_pb2.Duration()
+    converted_message.FromTimedelta(td)
+    self.assertEqual(message, converted_message)
+
+  def testInvalidTimestamp(self):
+    message = timestamp_pb2.Timestamp()
+    self.assertRaisesRegexp(
+        ValueError,
+        'Failed to parse timestamp: missing valid timezone offset.',
+        message.FromJsonString,
+        '')
+    self.assertRaisesRegexp(
+        ValueError,
+        'Failed to parse timestamp: invalid trailing data '
+        '1970-01-01T00:00:01Ztrail.',
+        message.FromJsonString,
+        '1970-01-01T00:00:01Ztrail')
+    self.assertRaisesRegexp(
+        ValueError,
+        'time data \'10000-01-01T00:00:00\' does not match'
+        ' format \'%Y-%m-%dT%H:%M:%S\'',
+        message.FromJsonString, '10000-01-01T00:00:00.00Z')
+    self.assertRaisesRegexp(
+        ValueError,
+        'nanos 0123456789012 more than 9 fractional digits.',
+        message.FromJsonString,
+        '1970-01-01T00:00:00.0123456789012Z')
+    self.assertRaisesRegexp(
+        ValueError,
+        (r'Invalid timezone offset value: \+08.'),
+        message.FromJsonString,
+        '1972-01-01T01:00:00.01+08',)
+    self.assertRaisesRegexp(
+        ValueError,
+        'year (0 )?is out of range',
+        message.FromJsonString,
+        '0000-01-01T00:00:00Z')
+    message.seconds = 253402300800
+    self.assertRaisesRegexp(
+        OverflowError,
+        'date value out of range',
+        message.ToJsonString)
+
+  def testInvalidDuration(self):
+    message = duration_pb2.Duration()
+    self.assertRaisesRegexp(
+        ValueError,
+        'Duration must end with letter "s": 1.',
+        message.FromJsonString, '1')
+    self.assertRaisesRegexp(
+        ValueError,
+        'Couldn\'t parse duration: 1...2s.',
+        message.FromJsonString, '1...2s')
+    text = '-315576000001.000000000s'
+    self.assertRaisesRegexp(
+        ValueError,
+        r'Duration is not valid\: Seconds -315576000001 must be in range'
+        r' \[-315576000000\, 315576000000\].',
+        message.FromJsonString, text)
+    text = '315576000001.000000000s'
+    self.assertRaisesRegexp(
+        ValueError,
+        r'Duration is not valid\: Seconds 315576000001 must be in range'
+        r' \[-315576000000\, 315576000000\].',
+        message.FromJsonString, text)
+    message.seconds = -315576000001
+    message.nanos = 0
+    self.assertRaisesRegexp(
+        ValueError,
+        r'Duration is not valid\: Seconds -315576000001 must be in range'
+        r' \[-315576000000\, 315576000000\].',
+        message.ToJsonString)
+    message.seconds = 0
+    message.nanos = 999999999 + 1
+    self.assertRaisesRegexp(
+        ValueError,
+        r'Duration is not valid\: Nanos 1000000000 must be in range'
+        r' \[-999999999\, 999999999\].',
+        message.ToJsonString)
+    message.seconds = -1
+    message.nanos = 1
+    self.assertRaisesRegexp(
+        ValueError,
+        r'Duration is not valid\: Sign mismatch.',
+        message.ToJsonString)
+
+
+class FieldMaskTest(unittest.TestCase):
+
+  def testStringFormat(self):
+    mask = field_mask_pb2.FieldMask()
+    self.assertEqual('', mask.ToJsonString())
+    mask.paths.append('foo')
+    self.assertEqual('foo', mask.ToJsonString())
+    mask.paths.append('bar')
+    self.assertEqual('foo,bar', mask.ToJsonString())
+
+    mask.FromJsonString('')
+    self.assertEqual('', mask.ToJsonString())
+    mask.FromJsonString('foo')
+    self.assertEqual(['foo'], mask.paths)
+    mask.FromJsonString('foo,bar')
+    self.assertEqual(['foo', 'bar'], mask.paths)
+
+    # Test camel case
+    mask.Clear()
+    mask.paths.append('foo_bar')
+    self.assertEqual('fooBar', mask.ToJsonString())
+    mask.paths.append('bar_quz')
+    self.assertEqual('fooBar,barQuz', mask.ToJsonString())
+
+    mask.FromJsonString('')
+    self.assertEqual('', mask.ToJsonString())
+    self.assertEqual([], mask.paths)
+    mask.FromJsonString('fooBar')
+    self.assertEqual(['foo_bar'], mask.paths)
+    mask.FromJsonString('fooBar,barQuz')
+    self.assertEqual(['foo_bar', 'bar_quz'], mask.paths)
+
+  def testDescriptorToFieldMask(self):
+    mask = field_mask_pb2.FieldMask()
+    msg_descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
+    mask.AllFieldsFromDescriptor(msg_descriptor)
+    self.assertEqual(75, len(mask.paths))
+    self.assertTrue(mask.IsValidForDescriptor(msg_descriptor))
+    for field in msg_descriptor.fields:
+      self.assertTrue(field.name in mask.paths)
+
+  def testIsValidForDescriptor(self):
+    msg_descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
+    # Empty mask
+    mask = field_mask_pb2.FieldMask()
+    self.assertTrue(mask.IsValidForDescriptor(msg_descriptor))
+    # All fields from descriptor
+    mask.AllFieldsFromDescriptor(msg_descriptor)
+    self.assertTrue(mask.IsValidForDescriptor(msg_descriptor))
+    # Child under optional message
+    mask.paths.append('optional_nested_message.bb')
+    self.assertTrue(mask.IsValidForDescriptor(msg_descriptor))
+    # Repeated field is only allowed in the last position of path
+    mask.paths.append('repeated_nested_message.bb')
+    self.assertFalse(mask.IsValidForDescriptor(msg_descriptor))
+    # Invalid top level field
+    mask = field_mask_pb2.FieldMask()
+    mask.paths.append('xxx')
+    self.assertFalse(mask.IsValidForDescriptor(msg_descriptor))
+    # Invalid field in root
+    mask = field_mask_pb2.FieldMask()
+    mask.paths.append('xxx.zzz')
+    self.assertFalse(mask.IsValidForDescriptor(msg_descriptor))
+    # Invalid field in internal node
+    mask = field_mask_pb2.FieldMask()
+    mask.paths.append('optional_nested_message.xxx.zzz')
+    self.assertFalse(mask.IsValidForDescriptor(msg_descriptor))
+    # Invalid field in leaf
+    mask = field_mask_pb2.FieldMask()
+    mask.paths.append('optional_nested_message.xxx')
+    self.assertFalse(mask.IsValidForDescriptor(msg_descriptor))
+
+  def testCanonicalFrom(self):
+    mask = field_mask_pb2.FieldMask()
+    out_mask = field_mask_pb2.FieldMask()
+    # Paths will be sorted.
+    mask.FromJsonString('baz.quz,bar,foo')
+    out_mask.CanonicalFormFromMask(mask)
+    self.assertEqual('bar,baz.quz,foo', out_mask.ToJsonString())
+    # Duplicated paths will be removed.
+    mask.FromJsonString('foo,bar,foo')
+    out_mask.CanonicalFormFromMask(mask)
+    self.assertEqual('bar,foo', out_mask.ToJsonString())
+    # Sub-paths of other paths will be removed.
+    mask.FromJsonString('foo.b1,bar.b1,foo.b2,bar')
+    out_mask.CanonicalFormFromMask(mask)
+    self.assertEqual('bar,foo.b1,foo.b2', out_mask.ToJsonString())
+
+    # Test more deeply nested cases.
+    mask.FromJsonString(
+        'foo.bar.baz1,foo.bar.baz2.quz,foo.bar.baz2')
+    out_mask.CanonicalFormFromMask(mask)
+    self.assertEqual('foo.bar.baz1,foo.bar.baz2',
+                     out_mask.ToJsonString())
+    mask.FromJsonString(
+        'foo.bar.baz1,foo.bar.baz2,foo.bar.baz2.quz')
+    out_mask.CanonicalFormFromMask(mask)
+    self.assertEqual('foo.bar.baz1,foo.bar.baz2',
+                     out_mask.ToJsonString())
+    mask.FromJsonString(
+        'foo.bar.baz1,foo.bar.baz2,foo.bar.baz2.quz,foo.bar')
+    out_mask.CanonicalFormFromMask(mask)
+    self.assertEqual('foo.bar', out_mask.ToJsonString())
+    mask.FromJsonString(
+        'foo.bar.baz1,foo.bar.baz2,foo.bar.baz2.quz,foo')
+    out_mask.CanonicalFormFromMask(mask)
+    self.assertEqual('foo', out_mask.ToJsonString())
+
+  def testUnion(self):
+    mask1 = field_mask_pb2.FieldMask()
+    mask2 = field_mask_pb2.FieldMask()
+    out_mask = field_mask_pb2.FieldMask()
+    mask1.FromJsonString('foo,baz')
+    mask2.FromJsonString('bar,quz')
+    out_mask.Union(mask1, mask2)
+    self.assertEqual('bar,baz,foo,quz', out_mask.ToJsonString())
+    # Overlap with duplicated paths.
+    mask1.FromJsonString('foo,baz.bb')
+    mask2.FromJsonString('baz.bb,quz')
+    out_mask.Union(mask1, mask2)
+    self.assertEqual('baz.bb,foo,quz', out_mask.ToJsonString())
+    # Overlap with paths covering some other paths.
+    mask1.FromJsonString('foo.bar.baz,quz')
+    mask2.FromJsonString('foo.bar,bar')
+    out_mask.Union(mask1, mask2)
+    self.assertEqual('bar,foo.bar,quz', out_mask.ToJsonString())
+    src = unittest_pb2.TestAllTypes()
+    with self.assertRaises(ValueError):
+      out_mask.Union(src, mask2)
+
+  def testIntersect(self):
+    mask1 = field_mask_pb2.FieldMask()
+    mask2 = field_mask_pb2.FieldMask()
+    out_mask = field_mask_pb2.FieldMask()
+    # Test cases without overlapping.
+    mask1.FromJsonString('foo,baz')
+    mask2.FromJsonString('bar,quz')
+    out_mask.Intersect(mask1, mask2)
+    self.assertEqual('', out_mask.ToJsonString())
+    self.assertEqual(len(out_mask.paths), 0)
+    self.assertEqual(out_mask.paths, [])
+    # Overlap with duplicated paths.
+    mask1.FromJsonString('foo,baz.bb')
+    mask2.FromJsonString('baz.bb,quz')
+    out_mask.Intersect(mask1, mask2)
+    self.assertEqual('baz.bb', out_mask.ToJsonString())
+    # Overlap with paths covering some other paths.
+    mask1.FromJsonString('foo.bar.baz,quz')
+    mask2.FromJsonString('foo.bar,bar')
+    out_mask.Intersect(mask1, mask2)
+    self.assertEqual('foo.bar.baz', out_mask.ToJsonString())
+    mask1.FromJsonString('foo.bar,bar')
+    mask2.FromJsonString('foo.bar.baz,quz')
+    out_mask.Intersect(mask1, mask2)
+    self.assertEqual('foo.bar.baz', out_mask.ToJsonString())
+    # Intersect '' with ''
+    mask1.Clear()
+    mask2.Clear()
+    mask1.paths.append('')
+    mask2.paths.append('')
+    self.assertEqual(mask1.paths, [''])
+    self.assertEqual('', mask1.ToJsonString())
+    out_mask.Intersect(mask1, mask2)
+    self.assertEqual(out_mask.paths, [])
+
+  def testMergeMessageWithoutMapFields(self):
+    # Test merge one field.
+    src = unittest_pb2.TestAllTypes()
+    test_util.SetAllFields(src)
+    for field in src.DESCRIPTOR.fields:
+      if field.containing_oneof:
+        continue
+      field_name = field.name
+      dst = unittest_pb2.TestAllTypes()
+      # Only set one path to mask.
+      mask = field_mask_pb2.FieldMask()
+      mask.paths.append(field_name)
+      mask.MergeMessage(src, dst)
+      # The expected result message.
+      msg = unittest_pb2.TestAllTypes()
+      if field.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+        repeated_src = getattr(src, field_name)
+        repeated_msg = getattr(msg, field_name)
+        if field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_MESSAGE:
+          for item in repeated_src:
+            repeated_msg.add().CopyFrom(item)
+        else:
+          repeated_msg.extend(repeated_src)
+      elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_MESSAGE:
+        getattr(msg, field_name).CopyFrom(getattr(src, field_name))
+      else:
+        setattr(msg, field_name, getattr(src, field_name))
+      # Only field specified in mask is merged.
+      self.assertEqual(msg, dst)
+
+    # Test merge nested fields.
+    nested_src = unittest_pb2.NestedTestAllTypes()
+    nested_dst = unittest_pb2.NestedTestAllTypes()
+    nested_src.child.payload.optional_int32 = 1234
+    nested_src.child.child.payload.optional_int32 = 5678
+    mask = field_mask_pb2.FieldMask()
+    mask.FromJsonString('child.payload')
+    mask.MergeMessage(nested_src, nested_dst)
+    self.assertEqual(1234, nested_dst.child.payload.optional_int32)
+    self.assertEqual(0, nested_dst.child.child.payload.optional_int32)
+
+    mask.FromJsonString('child.child.payload')
+    mask.MergeMessage(nested_src, nested_dst)
+    self.assertEqual(1234, nested_dst.child.payload.optional_int32)
+    self.assertEqual(5678, nested_dst.child.child.payload.optional_int32)
+
+    nested_dst.Clear()
+    mask.FromJsonString('child.child.payload')
+    mask.MergeMessage(nested_src, nested_dst)
+    self.assertEqual(0, nested_dst.child.payload.optional_int32)
+    self.assertEqual(5678, nested_dst.child.child.payload.optional_int32)
+
+    nested_dst.Clear()
+    mask.FromJsonString('child')
+    mask.MergeMessage(nested_src, nested_dst)
+    self.assertEqual(1234, nested_dst.child.payload.optional_int32)
+    self.assertEqual(5678, nested_dst.child.child.payload.optional_int32)
+
+    # Test MergeOptions.
+    nested_dst.Clear()
+    nested_dst.child.payload.optional_int64 = 4321
+    # Message fields will be merged by default.
+    mask.FromJsonString('child.payload')
+    mask.MergeMessage(nested_src, nested_dst)
+    self.assertEqual(1234, nested_dst.child.payload.optional_int32)
+    self.assertEqual(4321, nested_dst.child.payload.optional_int64)
+    # Change the behavior to replace message fields.
+    mask.FromJsonString('child.payload')
+    mask.MergeMessage(nested_src, nested_dst, True, False)
+    self.assertEqual(1234, nested_dst.child.payload.optional_int32)
+    self.assertEqual(0, nested_dst.child.payload.optional_int64)
+
+    # By default, fields missing in source are not cleared in destination.
+    nested_dst.payload.optional_int32 = 1234
+    self.assertTrue(nested_dst.HasField('payload'))
+    mask.FromJsonString('payload')
+    mask.MergeMessage(nested_src, nested_dst)
+    self.assertTrue(nested_dst.HasField('payload'))
+    # But they are cleared when replacing message fields.
+    nested_dst.Clear()
+    nested_dst.payload.optional_int32 = 1234
+    mask.FromJsonString('payload')
+    mask.MergeMessage(nested_src, nested_dst, True, False)
+    self.assertFalse(nested_dst.HasField('payload'))
+
+    nested_src.payload.repeated_int32.append(1234)
+    nested_dst.payload.repeated_int32.append(5678)
+    # Repeated fields will be appended by default.
+    mask.FromJsonString('payload.repeatedInt32')
+    mask.MergeMessage(nested_src, nested_dst)
+    self.assertEqual(2, len(nested_dst.payload.repeated_int32))
+    self.assertEqual(5678, nested_dst.payload.repeated_int32[0])
+    self.assertEqual(1234, nested_dst.payload.repeated_int32[1])
+    # Change the behavior to replace repeated fields.
+    mask.FromJsonString('payload.repeatedInt32')
+    mask.MergeMessage(nested_src, nested_dst, False, True)
+    self.assertEqual(1, len(nested_dst.payload.repeated_int32))
+    self.assertEqual(1234, nested_dst.payload.repeated_int32[0])
+
+    # Test Merge oneof field.
+    new_msg = unittest_pb2.TestOneof2()
+    dst = unittest_pb2.TestOneof2()
+    dst.foo_message.qux_int = 1
+    mask = field_mask_pb2.FieldMask()
+    mask.FromJsonString('fooMessage,fooLazyMessage.quxInt')
+    mask.MergeMessage(new_msg, dst)
+    self.assertTrue(dst.HasField('foo_message'))
+    self.assertFalse(dst.HasField('foo_lazy_message'))
+
+  def testMergeMessageWithMapField(self):
+    empty_map = map_unittest_pb2.TestRecursiveMapMessage()
+    src_level_2 = map_unittest_pb2.TestRecursiveMapMessage()
+    src_level_2.a['src level 2'].CopyFrom(empty_map)
+    src = map_unittest_pb2.TestRecursiveMapMessage()
+    src.a['common key'].CopyFrom(src_level_2)
+    src.a['src level 1'].CopyFrom(src_level_2)
+
+    dst_level_2 = map_unittest_pb2.TestRecursiveMapMessage()
+    dst_level_2.a['dst level 2'].CopyFrom(empty_map)
+    dst = map_unittest_pb2.TestRecursiveMapMessage()
+    dst.a['common key'].CopyFrom(dst_level_2)
+    dst.a['dst level 1'].CopyFrom(empty_map)
+
+    mask = field_mask_pb2.FieldMask()
+    mask.FromJsonString('a')
+    mask.MergeMessage(src, dst)
+
+    # map from dst is replaced with map from src.
+    self.assertEqual(dst.a['common key'], src_level_2)
+    self.assertEqual(dst.a['src level 1'], src_level_2)
+    self.assertEqual(dst.a['dst level 1'], empty_map)
+
+  def testMergeErrors(self):
+    src = unittest_pb2.TestAllTypes()
+    dst = unittest_pb2.TestAllTypes()
+    mask = field_mask_pb2.FieldMask()
+    test_util.SetAllFields(src)
+    mask.FromJsonString('optionalInt32.field')
+    with self.assertRaises(ValueError) as e:
+      mask.MergeMessage(src, dst)
+    self.assertEqual('Error: Field optional_int32 in message '
+                     'protobuf_unittest.TestAllTypes is not a singular '
+                     'message field and cannot have sub-fields.',
+                     str(e.exception))
+
+  def testSnakeCaseToCamelCase(self):
+    self.assertEqual('fooBar',
+                     well_known_types._SnakeCaseToCamelCase('foo_bar'))
+    self.assertEqual('FooBar',
+                     well_known_types._SnakeCaseToCamelCase('_foo_bar'))
+    self.assertEqual('foo3Bar',
+                     well_known_types._SnakeCaseToCamelCase('foo3_bar'))
+
+    # No uppercase letter is allowed.
+    self.assertRaisesRegexp(
+        ValueError,
+        'Fail to print FieldMask to Json string: Path name Foo must '
+        'not contain uppercase letters.',
+        well_known_types._SnakeCaseToCamelCase,
+        'Foo')
+    # Any character after a "_" must be a lowercase letter.
+    #   1. "_" cannot be followed by another "_".
+    #   2. "_" cannot be followed by a digit.
+    #   3. "_" cannot appear as the last character.
+    self.assertRaisesRegexp(
+        ValueError,
+        'Fail to print FieldMask to Json string: The character after a '
+        '"_" must be a lowercase letter in path name foo__bar.',
+        well_known_types._SnakeCaseToCamelCase,
+        'foo__bar')
+    self.assertRaisesRegexp(
+        ValueError,
+        'Fail to print FieldMask to Json string: The character after a '
+        '"_" must be a lowercase letter in path name foo_3bar.',
+        well_known_types._SnakeCaseToCamelCase,
+        'foo_3bar')
+    self.assertRaisesRegexp(
+        ValueError,
+        'Fail to print FieldMask to Json string: Trailing "_" in path '
+        'name foo_bar_.',
+        well_known_types._SnakeCaseToCamelCase,
+        'foo_bar_')
+
+  def testCamelCaseToSnakeCase(self):
+    self.assertEqual('foo_bar',
+                     well_known_types._CamelCaseToSnakeCase('fooBar'))
+    self.assertEqual('_foo_bar',
+                     well_known_types._CamelCaseToSnakeCase('FooBar'))
+    self.assertEqual('foo3_bar',
+                     well_known_types._CamelCaseToSnakeCase('foo3Bar'))
+    self.assertRaisesRegexp(
+        ValueError,
+        'Fail to parse FieldMask: Path name foo_bar must not contain "_"s.',
+        well_known_types._CamelCaseToSnakeCase,
+        'foo_bar')
+
+
+class StructTest(unittest.TestCase):
+
+  def testStruct(self):
+    struct = struct_pb2.Struct()
+    self.assertIsInstance(struct, collections_abc.Mapping)
+    self.assertEqual(0, len(struct))
+    struct_class = struct.__class__
+
+    struct['key1'] = 5
+    struct['key2'] = 'abc'
+    struct['key3'] = True
+    struct.get_or_create_struct('key4')['subkey'] = 11.0
+    struct_list = struct.get_or_create_list('key5')
+    self.assertIsInstance(struct_list, collections_abc.Sequence)
+    struct_list.extend([6, 'seven', True, False, None])
+    struct_list.add_struct()['subkey2'] = 9
+    struct['key6'] = {'subkey': {}}
+    struct['key7'] = [2, False]
+
+    self.assertEqual(7, len(struct))
+    self.assertTrue(isinstance(struct, well_known_types.Struct))
+    self.assertEqual(5, struct['key1'])
+    self.assertEqual('abc', struct['key2'])
+    self.assertIs(True, struct['key3'])
+    self.assertEqual(11, struct['key4']['subkey'])
+    inner_struct = struct_class()
+    inner_struct['subkey2'] = 9
+    self.assertEqual([6, 'seven', True, False, None, inner_struct],
+                     list(struct['key5'].items()))
+    self.assertEqual({}, dict(struct['key6']['subkey'].fields))
+    self.assertEqual([2, False], list(struct['key7'].items()))
+
+    serialized = struct.SerializeToString()
+    struct2 = struct_pb2.Struct()
+    struct2.ParseFromString(serialized)
+
+    self.assertEqual(struct, struct2)
+    for key, value in struct.items():
+      self.assertIn(key, struct)
+      self.assertIn(key, struct2)
+      self.assertEqual(value, struct2[key])
+
+    self.assertEqual(7, len(struct.keys()))
+    self.assertEqual(7, len(struct.values()))
+    for key in struct.keys():
+      self.assertIn(key, struct)
+      self.assertIn(key, struct2)
+      self.assertEqual(struct[key], struct2[key])
+
+    item = (next(iter(struct.keys())), next(iter(struct.values())))
+    self.assertEqual(item, next(iter(struct.items())))
+
+    self.assertTrue(isinstance(struct2, well_known_types.Struct))
+    self.assertEqual(5, struct2['key1'])
+    self.assertEqual('abc', struct2['key2'])
+    self.assertIs(True, struct2['key3'])
+    self.assertEqual(11, struct2['key4']['subkey'])
+    self.assertEqual([6, 'seven', True, False, None, inner_struct],
+                     list(struct2['key5'].items()))
+
+    struct_list = struct2['key5']
+    self.assertEqual(6, struct_list[0])
+    self.assertEqual('seven', struct_list[1])
+    self.assertEqual(True, struct_list[2])
+    self.assertEqual(False, struct_list[3])
+    self.assertEqual(None, struct_list[4])
+    self.assertEqual(inner_struct, struct_list[5])
+
+    struct_list[1] = 7
+    self.assertEqual(7, struct_list[1])
+
+    struct_list.add_list().extend([1, 'two', True, False, None])
+    self.assertEqual([1, 'two', True, False, None],
+                     list(struct_list[6].items()))
+    struct_list.extend([{'nested_struct': 30}, ['nested_list', 99], {}, []])
+    self.assertEqual(11, len(struct_list.values))
+    self.assertEqual(30, struct_list[7]['nested_struct'])
+    self.assertEqual('nested_list', struct_list[8][0])
+    self.assertEqual(99, struct_list[8][1])
+    self.assertEqual({}, dict(struct_list[9].fields))
+    self.assertEqual([], list(struct_list[10].items()))
+    struct_list[0] = {'replace': 'set'}
+    struct_list[1] = ['replace', 'set']
+    self.assertEqual('set', struct_list[0]['replace'])
+    self.assertEqual(['replace', 'set'], list(struct_list[1].items()))
+
+    text_serialized = str(struct)
+    struct3 = struct_pb2.Struct()
+    text_format.Merge(text_serialized, struct3)
+    self.assertEqual(struct, struct3)
+
+    struct.get_or_create_struct('key3')['replace'] = 12
+    self.assertEqual(12, struct['key3']['replace'])
+
+    # Tests empty list.
+    struct.get_or_create_list('empty_list')
+    empty_list = struct['empty_list']
+    self.assertEqual([], list(empty_list.items()))
+    list2 = struct_pb2.ListValue()
+    list2.add_list()
+    empty_list = list2[0]
+    self.assertEqual([], list(empty_list.items()))
+
+    # Tests empty struct.
+    struct.get_or_create_struct('empty_struct')
+    empty_struct = struct['empty_struct']
+    self.assertEqual({}, dict(empty_struct.fields))
+    list2.add_struct()
+    empty_struct = list2[1]
+    self.assertEqual({}, dict(empty_struct.fields))
+
+    self.assertEqual(9, len(struct))
+    del struct['key3']
+    del struct['key4']
+    self.assertEqual(7, len(struct))
+    self.assertEqual(6, len(struct['key5']))
+    del struct['key5'][1]
+    self.assertEqual(5, len(struct['key5']))
+    self.assertEqual([6, True, False, None, inner_struct],
+                     list(struct['key5'].items()))
+
+  def testStructAssignment(self):
+    # Tests struct assignment from another struct
+    s1 = struct_pb2.Struct()
+    s2 = struct_pb2.Struct()
+    for value in [1, 'a', [1], ['a'], {'a': 'b'}]:
+      s1['x'] = value
+      s2['x'] = s1['x']
+      self.assertEqual(s1['x'], s2['x'])
+
+  def testMergeFrom(self):
+    struct = struct_pb2.Struct()
+    struct_class = struct.__class__
+
+    dictionary = {
+        'key1': 5,
+        'key2': 'abc',
+        'key3': True,
+        'key4': {'subkey': 11.0},
+        'key5': [6, 'seven', True, False, None, {'subkey2': 9}],
+        'key6': [['nested_list', True]],
+        'empty_struct': {},
+        'empty_list': []
+    }
+    struct.update(dictionary)
+    self.assertEqual(5, struct['key1'])
+    self.assertEqual('abc', struct['key2'])
+    self.assertIs(True, struct['key3'])
+    self.assertEqual(11, struct['key4']['subkey'])
+    inner_struct = struct_class()
+    inner_struct['subkey2'] = 9
+    self.assertEqual([6, 'seven', True, False, None, inner_struct],
+                     list(struct['key5'].items()))
+    self.assertEqual(2, len(struct['key6'][0].values))
+    self.assertEqual('nested_list', struct['key6'][0][0])
+    self.assertEqual(True, struct['key6'][0][1])
+    empty_list = struct['empty_list']
+    self.assertEqual([], list(empty_list.items()))
+    empty_struct = struct['empty_struct']
+    self.assertEqual({}, dict(empty_struct.fields))
+
+    # According to documentation: "When parsing from the wire or when merging,
+    # if there are duplicate map keys the last key seen is used".
+    duplicate = {
+        'key4': {'replace': 20},
+        'key5': [[False, 5]]
+    }
+    struct.update(duplicate)
+    self.assertEqual(1, len(struct['key4'].fields))
+    self.assertEqual(20, struct['key4']['replace'])
+    self.assertEqual(1, len(struct['key5'].values))
+    self.assertEqual(False, struct['key5'][0][0])
+    self.assertEqual(5, struct['key5'][0][1])
+
+
+class AnyTest(unittest.TestCase):
+
+  def testAnyMessage(self):
+    # Creates and sets message.
+    msg = any_test_pb2.TestAny()
+    msg_descriptor = msg.DESCRIPTOR
+    all_types = unittest_pb2.TestAllTypes()
+    all_descriptor = all_types.DESCRIPTOR
+    all_types.repeated_string.append(u'\u00fc\ua71f')
+    # Packs to Any.
+    msg.value.Pack(all_types)
+    self.assertEqual(msg.value.type_url,
+                     'type.googleapis.com/%s' % all_descriptor.full_name)
+    self.assertEqual(msg.value.value,
+                     all_types.SerializeToString())
+    # Tests Is() method.
+    self.assertTrue(msg.value.Is(all_descriptor))
+    self.assertFalse(msg.value.Is(msg_descriptor))
+    # Unpacks Any.
+    unpacked_message = unittest_pb2.TestAllTypes()
+    self.assertTrue(msg.value.Unpack(unpacked_message))
+    self.assertEqual(all_types, unpacked_message)
+    # Unpacks to different type.
+    self.assertFalse(msg.value.Unpack(msg))
+    # Only Any messages have Pack method.
+    try:
+      msg.Pack(all_types)
+    except AttributeError:
+      pass
+    else:
+      raise AttributeError('%s should not have Pack method.' %
+                           msg_descriptor.full_name)
+
+  def testUnpackWithNoSlashInTypeUrl(self):
+    msg = any_test_pb2.TestAny()
+    all_types = unittest_pb2.TestAllTypes()
+    all_descriptor = all_types.DESCRIPTOR
+    msg.value.Pack(all_types)
+    # Reset type_url to part of type_url after '/'
+    msg.value.type_url = msg.value.TypeName()
+    self.assertFalse(msg.value.Is(all_descriptor))
+    unpacked_message = unittest_pb2.TestAllTypes()
+    self.assertFalse(msg.value.Unpack(unpacked_message))
+
+  def testMessageName(self):
+    # Creates and sets message.
+    submessage = any_test_pb2.TestAny()
+    submessage.int_value = 12345
+    msg = any_pb2.Any()
+    msg.Pack(submessage)
+    self.assertEqual(msg.TypeName(), 'google.protobuf.internal.TestAny')
+
+  def testPackWithCustomTypeUrl(self):
+    submessage = any_test_pb2.TestAny()
+    submessage.int_value = 12345
+    msg = any_pb2.Any()
+    # Pack with a custom type URL prefix.
+    msg.Pack(submessage, 'type.myservice.com')
+    self.assertEqual(msg.type_url,
+                     'type.myservice.com/%s' % submessage.DESCRIPTOR.full_name)
+    # Pack with a custom type URL prefix ending with '/'.
+    msg.Pack(submessage, 'type.myservice.com/')
+    self.assertEqual(msg.type_url,
+                     'type.myservice.com/%s' % submessage.DESCRIPTOR.full_name)
+    # Pack with an empty type URL prefix.
+    msg.Pack(submessage, '')
+    self.assertEqual(msg.type_url,
+                     '/%s' % submessage.DESCRIPTOR.full_name)
+    # Test unpacking the type.
+    unpacked_message = any_test_pb2.TestAny()
+    self.assertTrue(msg.Unpack(unpacked_message))
+    self.assertEqual(submessage, unpacked_message)
+
+  def testPackDeterministic(self):
+    submessage = any_test_pb2.TestAny()
+    for i in range(10):
+      submessage.map_value[str(i)] = i * 2
+    msg = any_pb2.Any()
+    msg.Pack(submessage, deterministic=True)
+    serialized = msg.SerializeToString(deterministic=True)
+    golden = (b'\n4type.googleapis.com/google.protobuf.internal.TestAny\x12F'
+              b'\x1a\x05\n\x010\x10\x00\x1a\x05\n\x011\x10\x02\x1a\x05\n\x01'
+              b'2\x10\x04\x1a\x05\n\x013\x10\x06\x1a\x05\n\x014\x10\x08\x1a'
+              b'\x05\n\x015\x10\n\x1a\x05\n\x016\x10\x0c\x1a\x05\n\x017\x10'
+              b'\x0e\x1a\x05\n\x018\x10\x10\x1a\x05\n\x019\x10\x12')
+    self.assertEqual(golden, serialized)
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/wire_format.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/wire_format.py
new file mode 100644
index 0000000..883f525
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/wire_format.py
@@ -0,0 +1,268 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Constants and static functions to support protocol buffer wire format."""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+import struct
+from google.protobuf import descriptor
+from google.protobuf import message
+
+
+TAG_TYPE_BITS = 3  # Number of bits used to hold type info in a proto tag.
+TAG_TYPE_MASK = (1 << TAG_TYPE_BITS) - 1  # 0x7
+
+# These numbers identify the wire type of a protocol buffer value.
+# We use the least-significant TAG_TYPE_BITS bits of the varint-encoded
+# tag-and-type to store one of these WIRETYPE_* constants.
+# These values must match WireType enum in google/protobuf/wire_format.h.
+WIRETYPE_VARINT = 0
+WIRETYPE_FIXED64 = 1
+WIRETYPE_LENGTH_DELIMITED = 2
+WIRETYPE_START_GROUP = 3
+WIRETYPE_END_GROUP = 4
+WIRETYPE_FIXED32 = 5
+_WIRETYPE_MAX = 5
+
+
+# Bounds for various integer types.
+INT32_MAX = int((1 << 31) - 1)
+INT32_MIN = int(-(1 << 31))
+UINT32_MAX = (1 << 32) - 1
+
+INT64_MAX = (1 << 63) - 1
+INT64_MIN = -(1 << 63)
+UINT64_MAX = (1 << 64) - 1
+
+# "struct" format strings that will encode/decode the specified formats.
+FORMAT_UINT32_LITTLE_ENDIAN = '<I'
+FORMAT_UINT64_LITTLE_ENDIAN = '<Q'
+FORMAT_FLOAT_LITTLE_ENDIAN = '<f'
+FORMAT_DOUBLE_LITTLE_ENDIAN = '<d'
+
+
+# We'll have to provide alternate implementations of AppendLittleEndian*() on
+# any architectures where these checks fail.
+if struct.calcsize(FORMAT_UINT32_LITTLE_ENDIAN) != 4:
+  raise AssertionError('Format "I" is not a 32-bit number.')
+if struct.calcsize(FORMAT_UINT64_LITTLE_ENDIAN) != 8:
+  raise AssertionError('Format "Q" is not a 64-bit number.')
+
+
+def PackTag(field_number, wire_type):
+  """Returns an unsigned 32-bit integer that encodes the field number and
+  wire type information in standard protocol message wire format.
+
+  Args:
+    field_number: Expected to be an integer in the range [1, 1 << 29)
+    wire_type: One of the WIRETYPE_* constants.
+  """
+  if not 0 <= wire_type <= _WIRETYPE_MAX:
+    raise message.EncodeError('Unknown wire type: %d' % wire_type)
+  return (field_number << TAG_TYPE_BITS) | wire_type
+
+
+def UnpackTag(tag):
+  """The inverse of PackTag().  Given an unsigned 32-bit number,
+  returns a (field_number, wire_type) tuple.
+  """
+  return (tag >> TAG_TYPE_BITS), (tag & TAG_TYPE_MASK)
+
+
+def ZigZagEncode(value):
+  """ZigZag Transform:  Encodes signed integers so that they can be
+  effectively used with varint encoding.  See wire_format.h for
+  more details.
+  """
+  if value >= 0:
+    return value << 1
+  return (value << 1) ^ (~0)
+
+
+def ZigZagDecode(value):
+  """Inverse of ZigZagEncode()."""
+  if not value & 0x1:
+    return value >> 1
+  return (value >> 1) ^ (~0)
+
+
+
+# The *ByteSize() functions below return the number of bytes required to
+# serialize "field number + type" information and then serialize the value.
+
+
+def Int32ByteSize(field_number, int32):
+  return Int64ByteSize(field_number, int32)
+
+
+def Int32ByteSizeNoTag(int32):
+  return _VarUInt64ByteSizeNoTag(0xffffffffffffffff & int32)
+
+
+def Int64ByteSize(field_number, int64):
+  # Have to convert to uint before calling UInt64ByteSize().
+  return UInt64ByteSize(field_number, 0xffffffffffffffff & int64)
+
+
+def UInt32ByteSize(field_number, uint32):
+  return UInt64ByteSize(field_number, uint32)
+
+
+def UInt64ByteSize(field_number, uint64):
+  return TagByteSize(field_number) + _VarUInt64ByteSizeNoTag(uint64)
+
+
+def SInt32ByteSize(field_number, int32):
+  return UInt32ByteSize(field_number, ZigZagEncode(int32))
+
+
+def SInt64ByteSize(field_number, int64):
+  return UInt64ByteSize(field_number, ZigZagEncode(int64))
+
+
+def Fixed32ByteSize(field_number, fixed32):
+  return TagByteSize(field_number) + 4
+
+
+def Fixed64ByteSize(field_number, fixed64):
+  return TagByteSize(field_number) + 8
+
+
+def SFixed32ByteSize(field_number, sfixed32):
+  return TagByteSize(field_number) + 4
+
+
+def SFixed64ByteSize(field_number, sfixed64):
+  return TagByteSize(field_number) + 8
+
+
+def FloatByteSize(field_number, flt):
+  return TagByteSize(field_number) + 4
+
+
+def DoubleByteSize(field_number, double):
+  return TagByteSize(field_number) + 8
+
+
+def BoolByteSize(field_number, b):
+  return TagByteSize(field_number) + 1
+
+
+def EnumByteSize(field_number, enum):
+  return UInt32ByteSize(field_number, enum)
+
+
+def StringByteSize(field_number, string):
+  return BytesByteSize(field_number, string.encode('utf-8'))
+
+
+def BytesByteSize(field_number, b):
+  return (TagByteSize(field_number)
+          + _VarUInt64ByteSizeNoTag(len(b))
+          + len(b))
+
+
+def GroupByteSize(field_number, message):
+  return (2 * TagByteSize(field_number)  # START and END group.
+          + message.ByteSize())
+
+
+def MessageByteSize(field_number, message):
+  return (TagByteSize(field_number)
+          + _VarUInt64ByteSizeNoTag(message.ByteSize())
+          + message.ByteSize())
+
+
+def MessageSetItemByteSize(field_number, msg):
+  # First compute the sizes of the tags.
+  # There are 2 tags for the beginning and ending of the repeated group, that
+  # is field number 1, one with field number 2 (type_id) and one with field
+  # number 3 (message).
+  total_size = (2 * TagByteSize(1) + TagByteSize(2) + TagByteSize(3))
+
+  # Add the number of bytes for type_id.
+  total_size += _VarUInt64ByteSizeNoTag(field_number)
+
+  message_size = msg.ByteSize()
+
+  # The number of bytes for encoding the length of the message.
+  total_size += _VarUInt64ByteSizeNoTag(message_size)
+
+  # The size of the message.
+  total_size += message_size
+  return total_size
+
+
+def TagByteSize(field_number):
+  """Returns the bytes required to serialize a tag with this field number."""
+  # Just pass in type 0, since the type won't affect the tag+type size.
+  return _VarUInt64ByteSizeNoTag(PackTag(field_number, 0))
+
+
+# Private helper function for the *ByteSize() functions above.
+
+def _VarUInt64ByteSizeNoTag(uint64):
+  """Returns the number of bytes required to serialize a single varint
+  using boundary value comparisons. (unrolled loop optimization -WPierce)
+  uint64 must be unsigned.
+  """
+  if uint64 <= 0x7f: return 1
+  if uint64 <= 0x3fff: return 2
+  if uint64 <= 0x1fffff: return 3
+  if uint64 <= 0xfffffff: return 4
+  if uint64 <= 0x7ffffffff: return 5
+  if uint64 <= 0x3ffffffffff: return 6
+  if uint64 <= 0x1ffffffffffff: return 7
+  if uint64 <= 0xffffffffffffff: return 8
+  if uint64 <= 0x7fffffffffffffff: return 9
+  if uint64 > UINT64_MAX:
+    raise message.EncodeError('Value out of range: %d' % uint64)
+  return 10
+
+
+NON_PACKABLE_TYPES = (
+  descriptor.FieldDescriptor.TYPE_STRING,
+  descriptor.FieldDescriptor.TYPE_GROUP,
+  descriptor.FieldDescriptor.TYPE_MESSAGE,
+  descriptor.FieldDescriptor.TYPE_BYTES
+)
+
+
+def IsTypePackable(field_type):
+  """Return true iff packable = true is valid for fields of this type.
+
+  Args:
+    field_type: a FieldDescriptor::Type value.
+
+  Returns:
+    True iff fields of this type are packable.
+  """
+  return field_type not in NON_PACKABLE_TYPES
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/wire_format_test.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/wire_format_test.py
new file mode 100644
index 0000000..da120f3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/internal/wire_format_test.py
@@ -0,0 +1,257 @@
+#! /usr/bin/env python
+#
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Test for google.protobuf.internal.wire_format."""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+try:
+  import unittest2 as unittest  #PY26
+except ImportError:
+  import unittest
+
+from google.protobuf import message
+from google.protobuf.internal import wire_format
+
+
+class WireFormatTest(unittest.TestCase):
+
+  def testPackTag(self):
+    field_number = 0xabc
+    tag_type = 2
+    self.assertEqual((field_number << 3) | tag_type,
+                     wire_format.PackTag(field_number, tag_type))
+    PackTag = wire_format.PackTag
+    # Number too high.
+    self.assertRaises(message.EncodeError, PackTag, field_number, 6)
+    # Number too low.
+    self.assertRaises(message.EncodeError, PackTag, field_number, -1)
+
+  def testUnpackTag(self):
+    # Test field numbers that will require various varint sizes.
+    for expected_field_number in (1, 15, 16, 2047, 2048):
+      for expected_wire_type in range(6):  # Highest-numbered wiretype is 5.
+        field_number, wire_type = wire_format.UnpackTag(
+            wire_format.PackTag(expected_field_number, expected_wire_type))
+        self.assertEqual(expected_field_number, field_number)
+        self.assertEqual(expected_wire_type, wire_type)
+
+    self.assertRaises(TypeError, wire_format.UnpackTag, None)
+    self.assertRaises(TypeError, wire_format.UnpackTag, 'abc')
+    self.assertRaises(TypeError, wire_format.UnpackTag, 0.0)
+    self.assertRaises(TypeError, wire_format.UnpackTag, object())
+
+  def testZigZagEncode(self):
+    Z = wire_format.ZigZagEncode
+    self.assertEqual(0, Z(0))
+    self.assertEqual(1, Z(-1))
+    self.assertEqual(2, Z(1))
+    self.assertEqual(3, Z(-2))
+    self.assertEqual(4, Z(2))
+    self.assertEqual(0xfffffffe, Z(0x7fffffff))
+    self.assertEqual(0xffffffff, Z(-0x80000000))
+    self.assertEqual(0xfffffffffffffffe, Z(0x7fffffffffffffff))
+    self.assertEqual(0xffffffffffffffff, Z(-0x8000000000000000))
+
+    self.assertRaises(TypeError, Z, None)
+    self.assertRaises(TypeError, Z, 'abcd')
+    self.assertRaises(TypeError, Z, 0.0)
+    self.assertRaises(TypeError, Z, object())
+
+  def testZigZagDecode(self):
+    Z = wire_format.ZigZagDecode
+    self.assertEqual(0, Z(0))
+    self.assertEqual(-1, Z(1))
+    self.assertEqual(1, Z(2))
+    self.assertEqual(-2, Z(3))
+    self.assertEqual(2, Z(4))
+    self.assertEqual(0x7fffffff, Z(0xfffffffe))
+    self.assertEqual(-0x80000000, Z(0xffffffff))
+    self.assertEqual(0x7fffffffffffffff, Z(0xfffffffffffffffe))
+    self.assertEqual(-0x8000000000000000, Z(0xffffffffffffffff))
+
+    self.assertRaises(TypeError, Z, None)
+    self.assertRaises(TypeError, Z, 'abcd')
+    self.assertRaises(TypeError, Z, 0.0)
+    self.assertRaises(TypeError, Z, object())
+
+  def NumericByteSizeTestHelper(self, byte_size_fn, value, expected_value_size):
+    # Use field numbers that cause various byte sizes for the tag information.
+    for field_number, tag_bytes in ((15, 1), (16, 2), (2047, 2), (2048, 3)):
+      expected_size = expected_value_size + tag_bytes
+      actual_size = byte_size_fn(field_number, value)
+      self.assertEqual(expected_size, actual_size,
+                       'byte_size_fn: %s, field_number: %d, value: %r\n'
+                       'Expected: %d, Actual: %d'% (
+          byte_size_fn, field_number, value, expected_size, actual_size))
+
+  def testByteSizeFunctions(self):
+    # Test all numeric *ByteSize() functions.
+    NUMERIC_ARGS = [
+        # Int32ByteSize().
+        [wire_format.Int32ByteSize, 0, 1],
+        [wire_format.Int32ByteSize, 127, 1],
+        [wire_format.Int32ByteSize, 128, 2],
+        [wire_format.Int32ByteSize, -1, 10],
+        # Int64ByteSize().
+        [wire_format.Int64ByteSize, 0, 1],
+        [wire_format.Int64ByteSize, 127, 1],
+        [wire_format.Int64ByteSize, 128, 2],
+        [wire_format.Int64ByteSize, -1, 10],
+        # UInt32ByteSize().
+        [wire_format.UInt32ByteSize, 0, 1],
+        [wire_format.UInt32ByteSize, 127, 1],
+        [wire_format.UInt32ByteSize, 128, 2],
+        [wire_format.UInt32ByteSize, wire_format.UINT32_MAX, 5],
+        # UInt64ByteSize().
+        [wire_format.UInt64ByteSize, 0, 1],
+        [wire_format.UInt64ByteSize, 127, 1],
+        [wire_format.UInt64ByteSize, 128, 2],
+        [wire_format.UInt64ByteSize, wire_format.UINT64_MAX, 10],
+        # SInt32ByteSize().
+        [wire_format.SInt32ByteSize, 0, 1],
+        [wire_format.SInt32ByteSize, -1, 1],
+        [wire_format.SInt32ByteSize, 1, 1],
+        [wire_format.SInt32ByteSize, -63, 1],
+        [wire_format.SInt32ByteSize, 63, 1],
+        [wire_format.SInt32ByteSize, -64, 1],
+        [wire_format.SInt32ByteSize, 64, 2],
+        # SInt64ByteSize().
+        [wire_format.SInt64ByteSize, 0, 1],
+        [wire_format.SInt64ByteSize, -1, 1],
+        [wire_format.SInt64ByteSize, 1, 1],
+        [wire_format.SInt64ByteSize, -63, 1],
+        [wire_format.SInt64ByteSize, 63, 1],
+        [wire_format.SInt64ByteSize, -64, 1],
+        [wire_format.SInt64ByteSize, 64, 2],
+        # Fixed32ByteSize().
+        [wire_format.Fixed32ByteSize, 0, 4],
+        [wire_format.Fixed32ByteSize, wire_format.UINT32_MAX, 4],
+        # Fixed64ByteSize().
+        [wire_format.Fixed64ByteSize, 0, 8],
+        [wire_format.Fixed64ByteSize, wire_format.UINT64_MAX, 8],
+        # SFixed32ByteSize().
+        [wire_format.SFixed32ByteSize, 0, 4],
+        [wire_format.SFixed32ByteSize, wire_format.INT32_MIN, 4],
+        [wire_format.SFixed32ByteSize, wire_format.INT32_MAX, 4],
+        # SFixed64ByteSize().
+        [wire_format.SFixed64ByteSize, 0, 8],
+        [wire_format.SFixed64ByteSize, wire_format.INT64_MIN, 8],
+        [wire_format.SFixed64ByteSize, wire_format.INT64_MAX, 8],
+        # FloatByteSize().
+        [wire_format.FloatByteSize, 0.0, 4],
+        [wire_format.FloatByteSize, 1000000000.0, 4],
+        [wire_format.FloatByteSize, -1000000000.0, 4],
+        # DoubleByteSize().
+        [wire_format.DoubleByteSize, 0.0, 8],
+        [wire_format.DoubleByteSize, 1000000000.0, 8],
+        [wire_format.DoubleByteSize, -1000000000.0, 8],
+        # BoolByteSize().
+        [wire_format.BoolByteSize, False, 1],
+        [wire_format.BoolByteSize, True, 1],
+        # EnumByteSize().
+        [wire_format.EnumByteSize, 0, 1],
+        [wire_format.EnumByteSize, 127, 1],
+        [wire_format.EnumByteSize, 128, 2],
+        [wire_format.EnumByteSize, wire_format.UINT32_MAX, 5],
+        ]
+    for args in NUMERIC_ARGS:
+      self.NumericByteSizeTestHelper(*args)
+
+    # Test strings and bytes.
+    for byte_size_fn in (wire_format.StringByteSize, wire_format.BytesByteSize):
+      # 1 byte for tag, 1 byte for length, 3 bytes for contents.
+      self.assertEqual(5, byte_size_fn(10, 'abc'))
+      # 2 bytes for tag, 1 byte for length, 3 bytes for contents.
+      self.assertEqual(6, byte_size_fn(16, 'abc'))
+      # 2 bytes for tag, 2 bytes for length, 128 bytes for contents.
+      self.assertEqual(132, byte_size_fn(16, 'a' * 128))
+
+    # Test UTF-8 string byte size calculation.
+    # 1 byte for tag, 1 byte for length, 8 bytes for content.
+    self.assertEqual(10, wire_format.StringByteSize(
+        5, b'\xd0\xa2\xd0\xb5\xd1\x81\xd1\x82'.decode('utf-8')))
+
+    class MockMessage(object):
+      def __init__(self, byte_size):
+        self.byte_size = byte_size
+      def ByteSize(self):
+        return self.byte_size
+
+    message_byte_size = 10
+    mock_message = MockMessage(byte_size=message_byte_size)
+    # Test groups.
+    # (2 * 1) bytes for begin and end tags, plus message_byte_size.
+    self.assertEqual(2 + message_byte_size,
+                     wire_format.GroupByteSize(1, mock_message))
+    # (2 * 2) bytes for begin and end tags, plus message_byte_size.
+    self.assertEqual(4 + message_byte_size,
+                     wire_format.GroupByteSize(16, mock_message))
+
+    # Test messages.
+    # 1 byte for tag, plus 1 byte for length, plus contents.
+    self.assertEqual(2 + mock_message.byte_size,
+                     wire_format.MessageByteSize(1, mock_message))
+    # 2 bytes for tag, plus 1 byte for length, plus contents.
+    self.assertEqual(3 + mock_message.byte_size,
+                     wire_format.MessageByteSize(16, mock_message))
+    # 2 bytes for tag, plus 2 bytes for length, plus contents.
+    mock_message.byte_size = 128
+    self.assertEqual(4 + mock_message.byte_size,
+                     wire_format.MessageByteSize(16, mock_message))
+
+
+    # Test message set item byte size.
+    # 4 bytes for tags, plus 1 byte for length, plus 1 byte for type_id,
+    # plus contents.
+    mock_message.byte_size = 10
+    self.assertEqual(mock_message.byte_size + 6,
+                     wire_format.MessageSetItemByteSize(1, mock_message))
+
+    # 4 bytes for tags, plus 2 bytes for length, plus 1 byte for type_id,
+    # plus contents.
+    mock_message.byte_size = 128
+    self.assertEqual(mock_message.byte_size + 7,
+                     wire_format.MessageSetItemByteSize(1, mock_message))
+
+    # 4 bytes for tags, plus 2 bytes for length, plus 2 byte for type_id,
+    # plus contents.
+    self.assertEqual(mock_message.byte_size + 8,
+                     wire_format.MessageSetItemByteSize(128, mock_message))
+
+    # Too-long varint.
+    self.assertRaises(message.EncodeError,
+                      wire_format.UInt64ByteSize, 1, 1 << 128)
+
+
+if __name__ == '__main__':
+  unittest.main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/json_format.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/json_format.py
new file mode 100644
index 0000000..4d76d02
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/json_format.py
@@ -0,0 +1,860 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Contains routines for printing protocol messages in JSON format.
+
+Simple usage example:
+
+  # Create a proto object and serialize it to a json format string.
+  message = my_proto_pb2.MyMessage(foo='bar')
+  json_string = json_format.MessageToJson(message)
+
+  # Parse a json format string to proto object.
+  message = json_format.Parse(json_string, my_proto_pb2.MyMessage())
+"""
+
+__author__ = 'jieluo@google.com (Jie Luo)'
+
+# pylint: disable=g-statement-before-imports,g-import-not-at-top
+try:
+  from collections import OrderedDict
+except ImportError:
+  from ordereddict import OrderedDict  # PY26
+# pylint: enable=g-statement-before-imports,g-import-not-at-top
+
+import base64
+import json
+import math
+
+from operator import methodcaller
+
+import re
+import sys
+
+import six
+
+from google.protobuf.internal import type_checkers
+from google.protobuf import descriptor
+from google.protobuf import symbol_database
+
+
+_TIMESTAMPFOMAT = '%Y-%m-%dT%H:%M:%S'
+_INT_TYPES = frozenset([descriptor.FieldDescriptor.CPPTYPE_INT32,
+                        descriptor.FieldDescriptor.CPPTYPE_UINT32,
+                        descriptor.FieldDescriptor.CPPTYPE_INT64,
+                        descriptor.FieldDescriptor.CPPTYPE_UINT64])
+_INT64_TYPES = frozenset([descriptor.FieldDescriptor.CPPTYPE_INT64,
+                          descriptor.FieldDescriptor.CPPTYPE_UINT64])
+_FLOAT_TYPES = frozenset([descriptor.FieldDescriptor.CPPTYPE_FLOAT,
+                          descriptor.FieldDescriptor.CPPTYPE_DOUBLE])
+_INFINITY = 'Infinity'
+_NEG_INFINITY = '-Infinity'
+_NAN = 'NaN'
+
+_UNPAIRED_SURROGATE_PATTERN = re.compile(six.u(
+    r'[\ud800-\udbff](?![\udc00-\udfff])|(?<![\ud800-\udbff])[\udc00-\udfff]'
+))
+
+_VALID_EXTENSION_NAME = re.compile(r'\[[a-zA-Z0-9\._]*\]$')
+
+
+class Error(Exception):
+  """Top-level module error for json_format."""
+
+
+class SerializeToJsonError(Error):
+  """Thrown if serialization to JSON fails."""
+
+
+class ParseError(Error):
+  """Thrown in case of parsing error."""
+
+
+def MessageToJson(
+    message,
+    including_default_value_fields=False,
+    preserving_proto_field_name=False,
+    indent=2,
+    sort_keys=False,
+    use_integers_for_enums=False,
+    descriptor_pool=None,
+    float_precision=None):
+  """Converts protobuf message to JSON format.
+
+  Args:
+    message: The protocol buffers message instance to serialize.
+    including_default_value_fields: If True, singular primitive fields,
+        repeated fields, and map fields will always be serialized.  If
+        False, only serialize non-empty fields.  Singular message fields
+        and oneof fields are not affected by this option.
+    preserving_proto_field_name: If True, use the original proto field
+        names as defined in the .proto file. If False, convert the field
+        names to lowerCamelCase.
+    indent: The JSON object will be pretty-printed with this indent level.
+        An indent level of 0 or negative will only insert newlines.
+    sort_keys: If True, then the output will be sorted by field names.
+    use_integers_for_enums: If true, print integers instead of enum names.
+    descriptor_pool: A Descriptor Pool for resolving types. If None use the
+        default.
+    float_precision: If set, use this to specify float field valid digits.
+
+  Returns:
+    A string containing the JSON formatted protocol buffer message.
+  """
+  printer = _Printer(
+      including_default_value_fields,
+      preserving_proto_field_name,
+      use_integers_for_enums,
+      descriptor_pool,
+      float_precision=float_precision)
+  return printer.ToJsonString(message, indent, sort_keys)
+
+
+def MessageToDict(
+    message,
+    including_default_value_fields=False,
+    preserving_proto_field_name=False,
+    use_integers_for_enums=False,
+    descriptor_pool=None,
+    float_precision=None):
+  """Converts protobuf message to a dictionary.
+
+  When the dictionary is encoded to JSON, it conforms to proto3 JSON spec.
+
+  Args:
+    message: The protocol buffers message instance to serialize.
+    including_default_value_fields: If True, singular primitive fields,
+        repeated fields, and map fields will always be serialized.  If
+        False, only serialize non-empty fields.  Singular message fields
+        and oneof fields are not affected by this option.
+    preserving_proto_field_name: If True, use the original proto field
+        names as defined in the .proto file. If False, convert the field
+        names to lowerCamelCase.
+    use_integers_for_enums: If true, print integers instead of enum names.
+    descriptor_pool: A Descriptor Pool for resolving types. If None use the
+        default.
+    float_precision: If set, use this to specify float field valid digits.
+
+  Returns:
+    A dict representation of the protocol buffer message.
+  """
+  printer = _Printer(
+      including_default_value_fields,
+      preserving_proto_field_name,
+      use_integers_for_enums,
+      descriptor_pool,
+      float_precision=float_precision)
+  # pylint: disable=protected-access
+  return printer._MessageToJsonObject(message)
+
+
+def _IsMapEntry(field):
+  return (field.type == descriptor.FieldDescriptor.TYPE_MESSAGE and
+          field.message_type.has_options and
+          field.message_type.GetOptions().map_entry)
+
+
+class _Printer(object):
+  """JSON format printer for protocol message."""
+
+  def __init__(
+      self,
+      including_default_value_fields=False,
+      preserving_proto_field_name=False,
+      use_integers_for_enums=False,
+      descriptor_pool=None,
+      float_precision=None):
+    self.including_default_value_fields = including_default_value_fields
+    self.preserving_proto_field_name = preserving_proto_field_name
+    self.use_integers_for_enums = use_integers_for_enums
+    self.descriptor_pool = descriptor_pool
+    if float_precision:
+      self.float_format = '.{}g'.format(float_precision)
+    else:
+      self.float_format = None
+
+  def ToJsonString(self, message, indent, sort_keys):
+    js = self._MessageToJsonObject(message)
+    return json.dumps(js, indent=indent, sort_keys=sort_keys)
+
+  def _MessageToJsonObject(self, message):
+    """Converts message to an object according to Proto3 JSON Specification."""
+    message_descriptor = message.DESCRIPTOR
+    full_name = message_descriptor.full_name
+    if _IsWrapperMessage(message_descriptor):
+      return self._WrapperMessageToJsonObject(message)
+    if full_name in _WKTJSONMETHODS:
+      return methodcaller(_WKTJSONMETHODS[full_name][0], message)(self)
+    js = {}
+    return self._RegularMessageToJsonObject(message, js)
+
+  def _RegularMessageToJsonObject(self, message, js):
+    """Converts normal message according to Proto3 JSON Specification."""
+    fields = message.ListFields()
+
+    try:
+      for field, value in fields:
+        if self.preserving_proto_field_name:
+          name = field.name
+        else:
+          name = field.json_name
+        if _IsMapEntry(field):
+          # Convert a map field.
+          v_field = field.message_type.fields_by_name['value']
+          js_map = {}
+          for key in value:
+            if isinstance(key, bool):
+              if key:
+                recorded_key = 'true'
+              else:
+                recorded_key = 'false'
+            else:
+              recorded_key = key
+            js_map[recorded_key] = self._FieldToJsonObject(
+                v_field, value[key])
+          js[name] = js_map
+        elif field.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+          # Convert a repeated field.
+          js[name] = [self._FieldToJsonObject(field, k)
+                      for k in value]
+        elif field.is_extension:
+          name = '[%s]' % field.full_name
+          js[name] = self._FieldToJsonObject(field, value)
+        else:
+          js[name] = self._FieldToJsonObject(field, value)
+
+      # Serialize default value if including_default_value_fields is True.
+      if self.including_default_value_fields:
+        message_descriptor = message.DESCRIPTOR
+        for field in message_descriptor.fields:
+          # Singular message fields and oneof fields will not be affected.
+          if ((field.label != descriptor.FieldDescriptor.LABEL_REPEATED and
+               field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_MESSAGE) or
+              field.containing_oneof):
+            continue
+          if self.preserving_proto_field_name:
+            name = field.name
+          else:
+            name = field.json_name
+          if name in js:
+            # Skip the field which has been serialized already.
+            continue
+          if _IsMapEntry(field):
+            js[name] = {}
+          elif field.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+            js[name] = []
+          else:
+            js[name] = self._FieldToJsonObject(field, field.default_value)
+
+    except ValueError as e:
+      raise SerializeToJsonError(
+          'Failed to serialize {0} field: {1}.'.format(field.name, e))
+
+    return js
+
+  def _FieldToJsonObject(self, field, value):
+    """Converts field value according to Proto3 JSON Specification."""
+    if field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_MESSAGE:
+      return self._MessageToJsonObject(value)
+    elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_ENUM:
+      if self.use_integers_for_enums:
+        return value
+      enum_value = field.enum_type.values_by_number.get(value, None)
+      if enum_value is not None:
+        return enum_value.name
+      else:
+        if field.file.syntax == 'proto3':
+          return value
+        raise SerializeToJsonError('Enum field contains an integer value '
+                                   'which can not mapped to an enum value.')
+    elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_STRING:
+      if field.type == descriptor.FieldDescriptor.TYPE_BYTES:
+        # Use base64 Data encoding for bytes
+        return base64.b64encode(value).decode('utf-8')
+      else:
+        return value
+    elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_BOOL:
+      return bool(value)
+    elif field.cpp_type in _INT64_TYPES:
+      return str(value)
+    elif field.cpp_type in _FLOAT_TYPES:
+      if math.isinf(value):
+        if value < 0.0:
+          return _NEG_INFINITY
+        else:
+          return _INFINITY
+      if math.isnan(value):
+        return _NAN
+      if field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_FLOAT:
+        if self.float_format:
+          return float(format(value, self.float_format))
+        else:
+          return type_checkers.ToShortestFloat(value)
+
+    return value
+
+  def _AnyMessageToJsonObject(self, message):
+    """Converts Any message according to Proto3 JSON Specification."""
+    if not message.ListFields():
+      return {}
+    # Must print @type first, use OrderedDict instead of {}
+    js = OrderedDict()
+    type_url = message.type_url
+    js['@type'] = type_url
+    sub_message = _CreateMessageFromTypeUrl(type_url, self.descriptor_pool)
+    sub_message.ParseFromString(message.value)
+    message_descriptor = sub_message.DESCRIPTOR
+    full_name = message_descriptor.full_name
+    if _IsWrapperMessage(message_descriptor):
+      js['value'] = self._WrapperMessageToJsonObject(sub_message)
+      return js
+    if full_name in _WKTJSONMETHODS:
+      js['value'] = methodcaller(_WKTJSONMETHODS[full_name][0],
+                                 sub_message)(self)
+      return js
+    return self._RegularMessageToJsonObject(sub_message, js)
+
+  def _GenericMessageToJsonObject(self, message):
+    """Converts message according to Proto3 JSON Specification."""
+    # Duration, Timestamp and FieldMask have ToJsonString method to do the
+    # convert. Users can also call the method directly.
+    return message.ToJsonString()
+
+  def _ValueMessageToJsonObject(self, message):
+    """Converts Value message according to Proto3 JSON Specification."""
+    which = message.WhichOneof('kind')
+    # If the Value message is not set treat as null_value when serialize
+    # to JSON. The parse back result will be different from original message.
+    if which is None or which == 'null_value':
+      return None
+    if which == 'list_value':
+      return self._ListValueMessageToJsonObject(message.list_value)
+    if which == 'struct_value':
+      value = message.struct_value
+    else:
+      value = getattr(message, which)
+    oneof_descriptor = message.DESCRIPTOR.fields_by_name[which]
+    return self._FieldToJsonObject(oneof_descriptor, value)
+
+  def _ListValueMessageToJsonObject(self, message):
+    """Converts ListValue message according to Proto3 JSON Specification."""
+    return [self._ValueMessageToJsonObject(value)
+            for value in message.values]
+
+  def _StructMessageToJsonObject(self, message):
+    """Converts Struct message according to Proto3 JSON Specification."""
+    fields = message.fields
+    ret = {}
+    for key in fields:
+      ret[key] = self._ValueMessageToJsonObject(fields[key])
+    return ret
+
+  def _WrapperMessageToJsonObject(self, message):
+    return self._FieldToJsonObject(
+        message.DESCRIPTOR.fields_by_name['value'], message.value)
+
+
+def _IsWrapperMessage(message_descriptor):
+  return message_descriptor.file.name == 'google/protobuf/wrappers.proto'
+
+
+def _DuplicateChecker(js):
+  result = {}
+  for name, value in js:
+    if name in result:
+      raise ParseError('Failed to load JSON: duplicate key {0}.'.format(name))
+    result[name] = value
+  return result
+
+
+def _CreateMessageFromTypeUrl(type_url, descriptor_pool):
+  """Creates a message from a type URL."""
+  db = symbol_database.Default()
+  pool = db.pool if descriptor_pool is None else descriptor_pool
+  type_name = type_url.split('/')[-1]
+  try:
+    message_descriptor = pool.FindMessageTypeByName(type_name)
+  except KeyError:
+    raise TypeError(
+        'Can not find message descriptor by type_url: {0}.'.format(type_url))
+  message_class = db.GetPrototype(message_descriptor)
+  return message_class()
+
+
+def Parse(text, message, ignore_unknown_fields=False, descriptor_pool=None):
+  """Parses a JSON representation of a protocol message into a message.
+
+  Args:
+    text: Message JSON representation.
+    message: A protocol buffer message to merge into.
+    ignore_unknown_fields: If True, do not raise errors for unknown fields.
+    descriptor_pool: A Descriptor Pool for resolving types. If None use the
+        default.
+
+  Returns:
+    The same message passed as argument.
+
+  Raises::
+    ParseError: On JSON parsing problems.
+  """
+  if not isinstance(text, six.text_type): text = text.decode('utf-8')
+  try:
+    js = json.loads(text, object_pairs_hook=_DuplicateChecker)
+  except ValueError as e:
+    raise ParseError('Failed to load JSON: {0}.'.format(str(e)))
+  return ParseDict(js, message, ignore_unknown_fields, descriptor_pool)
+
+
+def ParseDict(js_dict,
+              message,
+              ignore_unknown_fields=False,
+              descriptor_pool=None):
+  """Parses a JSON dictionary representation into a message.
+
+  Args:
+    js_dict: Dict representation of a JSON message.
+    message: A protocol buffer message to merge into.
+    ignore_unknown_fields: If True, do not raise errors for unknown fields.
+    descriptor_pool: A Descriptor Pool for resolving types. If None use the
+      default.
+
+  Returns:
+    The same message passed as argument.
+  """
+  parser = _Parser(ignore_unknown_fields, descriptor_pool)
+  parser.ConvertMessage(js_dict, message)
+  return message
+
+
+_INT_OR_FLOAT = six.integer_types + (float,)
+
+
+class _Parser(object):
+  """JSON format parser for protocol message."""
+
+  def __init__(self, ignore_unknown_fields, descriptor_pool):
+    self.ignore_unknown_fields = ignore_unknown_fields
+    self.descriptor_pool = descriptor_pool
+
+  def ConvertMessage(self, value, message):
+    """Convert a JSON object into a message.
+
+    Args:
+      value: A JSON object.
+      message: A WKT or regular protocol message to record the data.
+
+    Raises:
+      ParseError: In case of convert problems.
+    """
+    message_descriptor = message.DESCRIPTOR
+    full_name = message_descriptor.full_name
+    if _IsWrapperMessage(message_descriptor):
+      self._ConvertWrapperMessage(value, message)
+    elif full_name in _WKTJSONMETHODS:
+      methodcaller(_WKTJSONMETHODS[full_name][1], value, message)(self)
+    else:
+      self._ConvertFieldValuePair(value, message)
+
+  def _ConvertFieldValuePair(self, js, message):
+    """Convert field value pairs into regular message.
+
+    Args:
+      js: A JSON object to convert the field value pairs.
+      message: A regular protocol message to record the data.
+
+    Raises:
+      ParseError: In case of problems converting.
+    """
+    names = []
+    message_descriptor = message.DESCRIPTOR
+    fields_by_json_name = dict((f.json_name, f)
+                               for f in message_descriptor.fields)
+    for name in js:
+      try:
+        field = fields_by_json_name.get(name, None)
+        if not field:
+          field = message_descriptor.fields_by_name.get(name, None)
+        if not field and _VALID_EXTENSION_NAME.match(name):
+          if not message_descriptor.is_extendable:
+            raise ParseError('Message type {0} does not have extensions'.format(
+                message_descriptor.full_name))
+          identifier = name[1:-1]  # strip [] brackets
+          # pylint: disable=protected-access
+          field = message.Extensions._FindExtensionByName(identifier)
+          # pylint: enable=protected-access
+          if not field:
+            # Try looking for extension by the message type name, dropping the
+            # field name following the final . separator in full_name.
+            identifier = '.'.join(identifier.split('.')[:-1])
+            # pylint: disable=protected-access
+            field = message.Extensions._FindExtensionByName(identifier)
+            # pylint: enable=protected-access
+        if not field:
+          if self.ignore_unknown_fields:
+            continue
+          raise ParseError(
+              ('Message type "{0}" has no field named "{1}".\n'
+               ' Available Fields(except extensions): {2}').format(
+                   message_descriptor.full_name, name,
+                   [f.json_name for f in message_descriptor.fields]))
+        if name in names:
+          raise ParseError('Message type "{0}" should not have multiple '
+                           '"{1}" fields.'.format(
+                               message.DESCRIPTOR.full_name, name))
+        names.append(name)
+        # Check no other oneof field is parsed.
+        if field.containing_oneof is not None:
+          oneof_name = field.containing_oneof.name
+          if oneof_name in names:
+            raise ParseError('Message type "{0}" should not have multiple '
+                             '"{1}" oneof fields.'.format(
+                                 message.DESCRIPTOR.full_name, oneof_name))
+          names.append(oneof_name)
+
+        value = js[name]
+        if value is None:
+          if (field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_MESSAGE
+              and field.message_type.full_name == 'google.protobuf.Value'):
+            sub_message = getattr(message, field.name)
+            sub_message.null_value = 0
+          else:
+            message.ClearField(field.name)
+          continue
+
+        # Parse field value.
+        if _IsMapEntry(field):
+          message.ClearField(field.name)
+          self._ConvertMapFieldValue(value, message, field)
+        elif field.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+          message.ClearField(field.name)
+          if not isinstance(value, list):
+            raise ParseError('repeated field {0} must be in [] which is '
+                             '{1}.'.format(name, value))
+          if field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_MESSAGE:
+            # Repeated message field.
+            for item in value:
+              sub_message = getattr(message, field.name).add()
+              # None is a null_value in Value.
+              if (item is None and
+                  sub_message.DESCRIPTOR.full_name != 'google.protobuf.Value'):
+                raise ParseError('null is not allowed to be used as an element'
+                                 ' in a repeated field.')
+              self.ConvertMessage(item, sub_message)
+          else:
+            # Repeated scalar field.
+            for item in value:
+              if item is None:
+                raise ParseError('null is not allowed to be used as an element'
+                                 ' in a repeated field.')
+              getattr(message, field.name).append(
+                  _ConvertScalarFieldValue(item, field))
+        elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_MESSAGE:
+          if field.is_extension:
+            sub_message = message.Extensions[field]
+          else:
+            sub_message = getattr(message, field.name)
+          sub_message.SetInParent()
+          self.ConvertMessage(value, sub_message)
+        else:
+          if field.is_extension:
+            message.Extensions[field] = _ConvertScalarFieldValue(value, field)
+          else:
+            setattr(message, field.name, _ConvertScalarFieldValue(value, field))
+      except ParseError as e:
+        if field and field.containing_oneof is None:
+          raise ParseError('Failed to parse {0} field: {1}.'.format(name, e))
+        else:
+          raise ParseError(str(e))
+      except ValueError as e:
+        raise ParseError('Failed to parse {0} field: {1}.'.format(name, e))
+      except TypeError as e:
+        raise ParseError('Failed to parse {0} field: {1}.'.format(name, e))
+
+  def _ConvertAnyMessage(self, value, message):
+    """Convert a JSON representation into Any message."""
+    if isinstance(value, dict) and not value:
+      return
+    try:
+      type_url = value['@type']
+    except KeyError:
+      raise ParseError('@type is missing when parsing any message.')
+
+    sub_message = _CreateMessageFromTypeUrl(type_url, self.descriptor_pool)
+    message_descriptor = sub_message.DESCRIPTOR
+    full_name = message_descriptor.full_name
+    if _IsWrapperMessage(message_descriptor):
+      self._ConvertWrapperMessage(value['value'], sub_message)
+    elif full_name in _WKTJSONMETHODS:
+      methodcaller(
+          _WKTJSONMETHODS[full_name][1], value['value'], sub_message)(self)
+    else:
+      del value['@type']
+      self._ConvertFieldValuePair(value, sub_message)
+      value['@type'] = type_url
+    # Sets Any message
+    message.value = sub_message.SerializeToString()
+    message.type_url = type_url
+
+  def _ConvertGenericMessage(self, value, message):
+    """Convert a JSON representation into message with FromJsonString."""
+    # Duration, Timestamp, FieldMask have a FromJsonString method to do the
+    # conversion. Users can also call the method directly.
+    try:
+      message.FromJsonString(value)
+    except ValueError as e:
+      raise ParseError(e)
+
+  def _ConvertValueMessage(self, value, message):
+    """Convert a JSON representation into Value message."""
+    if isinstance(value, dict):
+      self._ConvertStructMessage(value, message.struct_value)
+    elif isinstance(value, list):
+      self. _ConvertListValueMessage(value, message.list_value)
+    elif value is None:
+      message.null_value = 0
+    elif isinstance(value, bool):
+      message.bool_value = value
+    elif isinstance(value, six.string_types):
+      message.string_value = value
+    elif isinstance(value, _INT_OR_FLOAT):
+      message.number_value = value
+    else:
+      raise ParseError('Value {0} has unexpected type {1}.'.format(
+          value, type(value)))
+
+  def _ConvertListValueMessage(self, value, message):
+    """Convert a JSON representation into ListValue message."""
+    if not isinstance(value, list):
+      raise ParseError(
+          'ListValue must be in [] which is {0}.'.format(value))
+    message.ClearField('values')
+    for item in value:
+      self._ConvertValueMessage(item, message.values.add())
+
+  def _ConvertStructMessage(self, value, message):
+    """Convert a JSON representation into Struct message."""
+    if not isinstance(value, dict):
+      raise ParseError(
+          'Struct must be in a dict which is {0}.'.format(value))
+    # Clear will mark the struct as modified so it will be created even if
+    # there are no values.
+    message.Clear()
+    for key in value:
+      self._ConvertValueMessage(value[key], message.fields[key])
+    return
+
+  def _ConvertWrapperMessage(self, value, message):
+    """Convert a JSON representation into Wrapper message."""
+    field = message.DESCRIPTOR.fields_by_name['value']
+    setattr(message, 'value', _ConvertScalarFieldValue(value, field))
+
+  def _ConvertMapFieldValue(self, value, message, field):
+    """Convert map field value for a message map field.
+
+    Args:
+      value: A JSON object to convert the map field value.
+      message: A protocol message to record the converted data.
+      field: The descriptor of the map field to be converted.
+
+    Raises:
+      ParseError: In case of convert problems.
+    """
+    if not isinstance(value, dict):
+      raise ParseError(
+          'Map field {0} must be in a dict which is {1}.'.format(
+              field.name, value))
+    key_field = field.message_type.fields_by_name['key']
+    value_field = field.message_type.fields_by_name['value']
+    for key in value:
+      key_value = _ConvertScalarFieldValue(key, key_field, True)
+      if value_field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_MESSAGE:
+        self.ConvertMessage(value[key], getattr(
+            message, field.name)[key_value])
+      else:
+        getattr(message, field.name)[key_value] = _ConvertScalarFieldValue(
+            value[key], value_field)
+
+
+def _ConvertScalarFieldValue(value, field, require_str=False):
+  """Convert a single scalar field value.
+
+  Args:
+    value: A scalar value to convert the scalar field value.
+    field: The descriptor of the field to convert.
+    require_str: If True, the field value must be a str.
+
+  Returns:
+    The converted scalar field value
+
+  Raises:
+    ParseError: In case of convert problems.
+  """
+  if field.cpp_type in _INT_TYPES:
+    return _ConvertInteger(value)
+  elif field.cpp_type in _FLOAT_TYPES:
+    return _ConvertFloat(value, field)
+  elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_BOOL:
+    return _ConvertBool(value, require_str)
+  elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_STRING:
+    if field.type == descriptor.FieldDescriptor.TYPE_BYTES:
+      if isinstance(value, six.text_type):
+        encoded = value.encode('utf-8')
+      else:
+        encoded = value
+      # Add extra padding '='
+      padded_value = encoded + b'=' * (4 - len(encoded) % 4)
+      return base64.urlsafe_b64decode(padded_value)
+    else:
+      # Checking for unpaired surrogates appears to be unreliable,
+      # depending on the specific Python version, so we check manually.
+      if _UNPAIRED_SURROGATE_PATTERN.search(value):
+        raise ParseError('Unpaired surrogate')
+      return value
+  elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_ENUM:
+    # Convert an enum value.
+    enum_value = field.enum_type.values_by_name.get(value, None)
+    if enum_value is None:
+      try:
+        number = int(value)
+        enum_value = field.enum_type.values_by_number.get(number, None)
+      except ValueError:
+        raise ParseError('Invalid enum value {0} for enum type {1}.'.format(
+            value, field.enum_type.full_name))
+      if enum_value is None:
+        if field.file.syntax == 'proto3':
+          # Proto3 accepts unknown enums.
+          return number
+        raise ParseError('Invalid enum value {0} for enum type {1}.'.format(
+            value, field.enum_type.full_name))
+    return enum_value.number
+
+
+def _ConvertInteger(value):
+  """Convert an integer.
+
+  Args:
+    value: A scalar value to convert.
+
+  Returns:
+    The integer value.
+
+  Raises:
+    ParseError: If an integer couldn't be consumed.
+  """
+  if isinstance(value, float) and not value.is_integer():
+    raise ParseError('Couldn\'t parse integer: {0}.'.format(value))
+
+  if isinstance(value, six.text_type) and value.find(' ') != -1:
+    raise ParseError('Couldn\'t parse integer: "{0}".'.format(value))
+
+  if isinstance(value, bool):
+    raise ParseError('Bool value {0} is not acceptable for '
+                     'integer field.'.format(value))
+
+  return int(value)
+
+
+def _ConvertFloat(value, field):
+  """Convert an floating point number."""
+  if isinstance(value, float):
+    if math.isnan(value):
+      raise ParseError('Couldn\'t parse NaN, use quoted "NaN" instead.')
+    if math.isinf(value):
+      if value > 0:
+        raise ParseError('Couldn\'t parse Infinity or value too large, '
+                         'use quoted "Infinity" instead.')
+      else:
+        raise ParseError('Couldn\'t parse -Infinity or value too small, '
+                         'use quoted "-Infinity" instead.')
+    if field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_FLOAT:
+      # pylint: disable=protected-access
+      if value > type_checkers._FLOAT_MAX:
+        raise ParseError('Float value too large')
+      # pylint: disable=protected-access
+      if value < type_checkers._FLOAT_MIN:
+        raise ParseError('Float value too small')
+  if value == 'nan':
+    raise ParseError('Couldn\'t parse float "nan", use "NaN" instead.')
+  try:
+    # Assume Python compatible syntax.
+    return float(value)
+  except ValueError:
+    # Check alternative spellings.
+    if value == _NEG_INFINITY:
+      return float('-inf')
+    elif value == _INFINITY:
+      return float('inf')
+    elif value == _NAN:
+      return float('nan')
+    else:
+      raise ParseError('Couldn\'t parse float: {0}.'.format(value))
+
+
+def _ConvertBool(value, require_str):
+  """Convert a boolean value.
+
+  Args:
+    value: A scalar value to convert.
+    require_str: If True, value must be a str.
+
+  Returns:
+    The bool parsed.
+
+  Raises:
+    ParseError: If a boolean value couldn't be consumed.
+  """
+  if require_str:
+    if value == 'true':
+      return True
+    elif value == 'false':
+      return False
+    else:
+      raise ParseError('Expected "true" or "false", not {0}.'.format(value))
+
+  if not isinstance(value, bool):
+    raise ParseError('Expected true or false without quotes.')
+  return value
+
+_WKTJSONMETHODS = {
+    'google.protobuf.Any': ['_AnyMessageToJsonObject',
+                            '_ConvertAnyMessage'],
+    'google.protobuf.Duration': ['_GenericMessageToJsonObject',
+                                 '_ConvertGenericMessage'],
+    'google.protobuf.FieldMask': ['_GenericMessageToJsonObject',
+                                  '_ConvertGenericMessage'],
+    'google.protobuf.ListValue': ['_ListValueMessageToJsonObject',
+                                  '_ConvertListValueMessage'],
+    'google.protobuf.Struct': ['_StructMessageToJsonObject',
+                               '_ConvertStructMessage'],
+    'google.protobuf.Timestamp': ['_GenericMessageToJsonObject',
+                                  '_ConvertGenericMessage'],
+    'google.protobuf.Value': ['_ValueMessageToJsonObject',
+                              '_ConvertValueMessage']
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/map_proto2_unittest_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/map_proto2_unittest_pb2.py
new file mode 100644
index 0000000..1863ff3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/map_proto2_unittest_pb2.py
@@ -0,0 +1,1345 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/map_proto2_unittest.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import unittest_import_pb2 as google_dot_protobuf_dot_unittest__import__pb2
+try:
+  google_dot_protobuf_dot_unittest__import__public__pb2 = google_dot_protobuf_dot_unittest__import__pb2.google_dot_protobuf_dot_unittest__import__public__pb2
+except AttributeError:
+  google_dot_protobuf_dot_unittest__import__public__pb2 = google_dot_protobuf_dot_unittest__import__pb2.google.protobuf.unittest_import_public_pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/map_proto2_unittest.proto',
+  package='protobuf_unittest',
+  syntax='proto2',
+  serialized_options=b'\370\001\001',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n)google/protobuf/map_proto2_unittest.proto\x12\x11protobuf_unittest\x1a%google/protobuf/unittest_import.proto\"\xdb\x02\n\x0bTestEnumMap\x12J\n\x0fknown_map_field\x18\x65 \x03(\x0b\x32\x31.protobuf_unittest.TestEnumMap.KnownMapFieldEntry\x12N\n\x11unknown_map_field\x18\x66 \x03(\x0b\x32\x33.protobuf_unittest.TestEnumMap.UnknownMapFieldEntry\x1aV\n\x12KnownMapFieldEntry\x12\x0b\n\x03key\x18\x01 \x01(\x05\x12/\n\x05value\x18\x02 \x01(\x0e\x32 .protobuf_unittest.Proto2MapEnum:\x02\x38\x01\x1aX\n\x14UnknownMapFieldEntry\x12\x0b\n\x03key\x18\x01 \x01(\x05\x12/\n\x05value\x18\x02 \x01(\x0e\x32 .protobuf_unittest.Proto2MapEnum:\x02\x38\x01\"\x88\x03\n\x14TestEnumMapPlusExtra\x12S\n\x0fknown_map_field\x18\x65 \x03(\x0b\x32:.protobuf_unittest.TestEnumMapPlusExtra.KnownMapFieldEntry\x12W\n\x11unknown_map_field\x18\x66 \x03(\x0b\x32<.protobuf_unittest.TestEnumMapPlusExtra.UnknownMapFieldEntry\x1a_\n\x12KnownMapFieldEntry\x12\x0b\n\x03key\x18\x01 \x01(\x05\x12\x38\n\x05value\x18\x02 \x01(\x0e\x32).protobuf_unittest.Proto2MapEnumPlusExtra:\x02\x38\x01\x1a\x61\n\x14UnknownMapFieldEntry\x12\x0b\n\x03key\x18\x01 \x01(\x05\x12\x38\n\x05value\x18\x02 \x01(\x0e\x32).protobuf_unittest.Proto2MapEnumPlusExtra:\x02\x38\x01\"\xc7\x01\n\x11TestImportEnumMap\x12P\n\x0fimport_enum_amp\x18\x01 \x03(\x0b\x32\x37.protobuf_unittest.TestImportEnumMap.ImportEnumAmpEntry\x1a`\n\x12ImportEnumAmpEntry\x12\x0b\n\x03key\x18\x01 \x01(\x05\x12\x39\n\x05value\x18\x02 \x01(\x0e\x32*.protobuf_unittest_import.ImportEnumForMap:\x02\x38\x01\"m\n\rTestIntIntMap\x12\x32\n\x01m\x18\x01 \x03(\x0b\x32\'.protobuf_unittest.TestIntIntMap.MEntry\x1a(\n\x06MEntry\x12\x0b\n\x03key\x18\x01 \x01(\x05\x12\r\n\x05value\x18\x02 \x01(\x05:\x02\x38\x01\"\xb8\r\n\x08TestMaps\x12\x38\n\x07m_int32\x18\x01 \x03(\x0b\x32\'.protobuf_unittest.TestMaps.MInt32Entry\x12\x38\n\x07m_int64\x18\x02 \x03(\x0b\x32\'.protobuf_unittest.TestMaps.MInt64Entry\x12:\n\x08m_uint32\x18\x03 \x03(\x0b\x32(.protobuf_unittest.TestMaps.MUint32Entry\x12:\n\x08m_uint64\x18\x04 \x03(\x0b\x32(.protobuf_unittest.TestMaps.MUint64Entry\x12:\n\x08m_sint32\x18\x05 \x03(\x0b\x32(.protobuf_unittest.TestMaps.MSint32Entry\x12:\n\x08m_sint64\x18\x06 \x03(\x0b\x32(.protobuf_unittest.TestMaps.MSint64Entry\x12<\n\tm_fixed32\x18\x07 \x03(\x0b\x32).protobuf_unittest.TestMaps.MFixed32Entry\x12<\n\tm_fixed64\x18\x08 \x03(\x0b\x32).protobuf_unittest.TestMaps.MFixed64Entry\x12>\n\nm_sfixed32\x18\t \x03(\x0b\x32*.protobuf_unittest.TestMaps.MSfixed32Entry\x12>\n\nm_sfixed64\x18\n \x03(\x0b\x32*.protobuf_unittest.TestMaps.MSfixed64Entry\x12\x36\n\x06m_bool\x18\x0b \x03(\x0b\x32&.protobuf_unittest.TestMaps.MBoolEntry\x12:\n\x08m_string\x18\x0c \x03(\x0b\x32(.protobuf_unittest.TestMaps.MStringEntry\x1aO\n\x0bMInt32Entry\x12\x0b\n\x03key\x18\x01 \x01(\x05\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aO\n\x0bMInt64Entry\x12\x0b\n\x03key\x18\x01 \x01(\x03\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aP\n\x0cMUint32Entry\x12\x0b\n\x03key\x18\x01 \x01(\r\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aP\n\x0cMUint64Entry\x12\x0b\n\x03key\x18\x01 \x01(\x04\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aP\n\x0cMSint32Entry\x12\x0b\n\x03key\x18\x01 \x01(\x11\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aP\n\x0cMSint64Entry\x12\x0b\n\x03key\x18\x01 \x01(\x12\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aQ\n\rMFixed32Entry\x12\x0b\n\x03key\x18\x01 \x01(\x07\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aQ\n\rMFixed64Entry\x12\x0b\n\x03key\x18\x01 \x01(\x06\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aR\n\x0eMSfixed32Entry\x12\x0b\n\x03key\x18\x01 \x01(\x0f\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aR\n\x0eMSfixed64Entry\x12\x0b\n\x03key\x18\x01 \x01(\x10\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aN\n\nMBoolEntry\x12\x0b\n\x03key\x18\x01 \x01(\x08\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\x1aP\n\x0cMStringEntry\x12\x0b\n\x03key\x18\x01 \x01(\t\x12/\n\x05value\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestIntIntMap:\x02\x38\x01\"<\n\x12TestSubmessageMaps\x12&\n\x01m\x18\x01 \x01(\x0b\x32\x1b.protobuf_unittest.TestMaps*Z\n\rProto2MapEnum\x12\x17\n\x13PROTO2_MAP_ENUM_FOO\x10\x00\x12\x17\n\x13PROTO2_MAP_ENUM_BAR\x10\x01\x12\x17\n\x13PROTO2_MAP_ENUM_BAZ\x10\x02*\x86\x01\n\x16Proto2MapEnumPlusExtra\x12\x19\n\x15\x45_PROTO2_MAP_ENUM_FOO\x10\x00\x12\x19\n\x15\x45_PROTO2_MAP_ENUM_BAR\x10\x01\x12\x19\n\x15\x45_PROTO2_MAP_ENUM_BAZ\x10\x02\x12\x1b\n\x17\x45_PROTO2_MAP_ENUM_EXTRA\x10\x03\x42\x03\xf8\x01\x01'
+  ,
+  dependencies=[google_dot_protobuf_dot_unittest__import__pb2.DESCRIPTOR,])
+
+_PROTO2MAPENUM = _descriptor.EnumDescriptor(
+  name='Proto2MapEnum',
+  full_name='protobuf_unittest.Proto2MapEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='PROTO2_MAP_ENUM_FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='PROTO2_MAP_ENUM_BAR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='PROTO2_MAP_ENUM_BAZ', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=2946,
+  serialized_end=3036,
+)
+_sym_db.RegisterEnumDescriptor(_PROTO2MAPENUM)
+
+Proto2MapEnum = enum_type_wrapper.EnumTypeWrapper(_PROTO2MAPENUM)
+_PROTO2MAPENUMPLUSEXTRA = _descriptor.EnumDescriptor(
+  name='Proto2MapEnumPlusExtra',
+  full_name='protobuf_unittest.Proto2MapEnumPlusExtra',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='E_PROTO2_MAP_ENUM_FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='E_PROTO2_MAP_ENUM_BAR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='E_PROTO2_MAP_ENUM_BAZ', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='E_PROTO2_MAP_ENUM_EXTRA', index=3, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=3039,
+  serialized_end=3173,
+)
+_sym_db.RegisterEnumDescriptor(_PROTO2MAPENUMPLUSEXTRA)
+
+Proto2MapEnumPlusExtra = enum_type_wrapper.EnumTypeWrapper(_PROTO2MAPENUMPLUSEXTRA)
+PROTO2_MAP_ENUM_FOO = 0
+PROTO2_MAP_ENUM_BAR = 1
+PROTO2_MAP_ENUM_BAZ = 2
+E_PROTO2_MAP_ENUM_FOO = 0
+E_PROTO2_MAP_ENUM_BAR = 1
+E_PROTO2_MAP_ENUM_BAZ = 2
+E_PROTO2_MAP_ENUM_EXTRA = 3
+
+
+
+_TESTENUMMAP_KNOWNMAPFIELDENTRY = _descriptor.Descriptor(
+  name='KnownMapFieldEntry',
+  full_name='protobuf_unittest.TestEnumMap.KnownMapFieldEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestEnumMap.KnownMapFieldEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestEnumMap.KnownMapFieldEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=275,
+  serialized_end=361,
+)
+
+_TESTENUMMAP_UNKNOWNMAPFIELDENTRY = _descriptor.Descriptor(
+  name='UnknownMapFieldEntry',
+  full_name='protobuf_unittest.TestEnumMap.UnknownMapFieldEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestEnumMap.UnknownMapFieldEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestEnumMap.UnknownMapFieldEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=363,
+  serialized_end=451,
+)
+
+_TESTENUMMAP = _descriptor.Descriptor(
+  name='TestEnumMap',
+  full_name='protobuf_unittest.TestEnumMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='known_map_field', full_name='protobuf_unittest.TestEnumMap.known_map_field', index=0,
+      number=101, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unknown_map_field', full_name='protobuf_unittest.TestEnumMap.unknown_map_field', index=1,
+      number=102, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTENUMMAP_KNOWNMAPFIELDENTRY, _TESTENUMMAP_UNKNOWNMAPFIELDENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=104,
+  serialized_end=451,
+)
+
+
+_TESTENUMMAPPLUSEXTRA_KNOWNMAPFIELDENTRY = _descriptor.Descriptor(
+  name='KnownMapFieldEntry',
+  full_name='protobuf_unittest.TestEnumMapPlusExtra.KnownMapFieldEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestEnumMapPlusExtra.KnownMapFieldEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestEnumMapPlusExtra.KnownMapFieldEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=652,
+  serialized_end=747,
+)
+
+_TESTENUMMAPPLUSEXTRA_UNKNOWNMAPFIELDENTRY = _descriptor.Descriptor(
+  name='UnknownMapFieldEntry',
+  full_name='protobuf_unittest.TestEnumMapPlusExtra.UnknownMapFieldEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestEnumMapPlusExtra.UnknownMapFieldEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestEnumMapPlusExtra.UnknownMapFieldEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=749,
+  serialized_end=846,
+)
+
+_TESTENUMMAPPLUSEXTRA = _descriptor.Descriptor(
+  name='TestEnumMapPlusExtra',
+  full_name='protobuf_unittest.TestEnumMapPlusExtra',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='known_map_field', full_name='protobuf_unittest.TestEnumMapPlusExtra.known_map_field', index=0,
+      number=101, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unknown_map_field', full_name='protobuf_unittest.TestEnumMapPlusExtra.unknown_map_field', index=1,
+      number=102, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTENUMMAPPLUSEXTRA_KNOWNMAPFIELDENTRY, _TESTENUMMAPPLUSEXTRA_UNKNOWNMAPFIELDENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=454,
+  serialized_end=846,
+)
+
+
+_TESTIMPORTENUMMAP_IMPORTENUMAMPENTRY = _descriptor.Descriptor(
+  name='ImportEnumAmpEntry',
+  full_name='protobuf_unittest.TestImportEnumMap.ImportEnumAmpEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestImportEnumMap.ImportEnumAmpEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestImportEnumMap.ImportEnumAmpEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=952,
+  serialized_end=1048,
+)
+
+_TESTIMPORTENUMMAP = _descriptor.Descriptor(
+  name='TestImportEnumMap',
+  full_name='protobuf_unittest.TestImportEnumMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='import_enum_amp', full_name='protobuf_unittest.TestImportEnumMap.import_enum_amp', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTIMPORTENUMMAP_IMPORTENUMAMPENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=849,
+  serialized_end=1048,
+)
+
+
+_TESTINTINTMAP_MENTRY = _descriptor.Descriptor(
+  name='MEntry',
+  full_name='protobuf_unittest.TestIntIntMap.MEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestIntIntMap.MEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestIntIntMap.MEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1119,
+  serialized_end=1159,
+)
+
+_TESTINTINTMAP = _descriptor.Descriptor(
+  name='TestIntIntMap',
+  full_name='protobuf_unittest.TestIntIntMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='m', full_name='protobuf_unittest.TestIntIntMap.m', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTINTINTMAP_MENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1050,
+  serialized_end=1159,
+)
+
+
+_TESTMAPS_MINT32ENTRY = _descriptor.Descriptor(
+  name='MInt32Entry',
+  full_name='protobuf_unittest.TestMaps.MInt32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MInt32Entry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MInt32Entry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1898,
+  serialized_end=1977,
+)
+
+_TESTMAPS_MINT64ENTRY = _descriptor.Descriptor(
+  name='MInt64Entry',
+  full_name='protobuf_unittest.TestMaps.MInt64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MInt64Entry.key', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MInt64Entry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1979,
+  serialized_end=2058,
+)
+
+_TESTMAPS_MUINT32ENTRY = _descriptor.Descriptor(
+  name='MUint32Entry',
+  full_name='protobuf_unittest.TestMaps.MUint32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MUint32Entry.key', index=0,
+      number=1, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MUint32Entry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2060,
+  serialized_end=2140,
+)
+
+_TESTMAPS_MUINT64ENTRY = _descriptor.Descriptor(
+  name='MUint64Entry',
+  full_name='protobuf_unittest.TestMaps.MUint64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MUint64Entry.key', index=0,
+      number=1, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MUint64Entry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2142,
+  serialized_end=2222,
+)
+
+_TESTMAPS_MSINT32ENTRY = _descriptor.Descriptor(
+  name='MSint32Entry',
+  full_name='protobuf_unittest.TestMaps.MSint32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MSint32Entry.key', index=0,
+      number=1, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MSint32Entry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2224,
+  serialized_end=2304,
+)
+
+_TESTMAPS_MSINT64ENTRY = _descriptor.Descriptor(
+  name='MSint64Entry',
+  full_name='protobuf_unittest.TestMaps.MSint64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MSint64Entry.key', index=0,
+      number=1, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MSint64Entry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2306,
+  serialized_end=2386,
+)
+
+_TESTMAPS_MFIXED32ENTRY = _descriptor.Descriptor(
+  name='MFixed32Entry',
+  full_name='protobuf_unittest.TestMaps.MFixed32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MFixed32Entry.key', index=0,
+      number=1, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MFixed32Entry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2388,
+  serialized_end=2469,
+)
+
+_TESTMAPS_MFIXED64ENTRY = _descriptor.Descriptor(
+  name='MFixed64Entry',
+  full_name='protobuf_unittest.TestMaps.MFixed64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MFixed64Entry.key', index=0,
+      number=1, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MFixed64Entry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2471,
+  serialized_end=2552,
+)
+
+_TESTMAPS_MSFIXED32ENTRY = _descriptor.Descriptor(
+  name='MSfixed32Entry',
+  full_name='protobuf_unittest.TestMaps.MSfixed32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MSfixed32Entry.key', index=0,
+      number=1, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MSfixed32Entry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2554,
+  serialized_end=2636,
+)
+
+_TESTMAPS_MSFIXED64ENTRY = _descriptor.Descriptor(
+  name='MSfixed64Entry',
+  full_name='protobuf_unittest.TestMaps.MSfixed64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MSfixed64Entry.key', index=0,
+      number=1, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MSfixed64Entry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2638,
+  serialized_end=2720,
+)
+
+_TESTMAPS_MBOOLENTRY = _descriptor.Descriptor(
+  name='MBoolEntry',
+  full_name='protobuf_unittest.TestMaps.MBoolEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MBoolEntry.key', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MBoolEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2722,
+  serialized_end=2800,
+)
+
+_TESTMAPS_MSTRINGENTRY = _descriptor.Descriptor(
+  name='MStringEntry',
+  full_name='protobuf_unittest.TestMaps.MStringEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMaps.MStringEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMaps.MStringEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2802,
+  serialized_end=2882,
+)
+
+_TESTMAPS = _descriptor.Descriptor(
+  name='TestMaps',
+  full_name='protobuf_unittest.TestMaps',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='m_int32', full_name='protobuf_unittest.TestMaps.m_int32', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_int64', full_name='protobuf_unittest.TestMaps.m_int64', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_uint32', full_name='protobuf_unittest.TestMaps.m_uint32', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_uint64', full_name='protobuf_unittest.TestMaps.m_uint64', index=3,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_sint32', full_name='protobuf_unittest.TestMaps.m_sint32', index=4,
+      number=5, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_sint64', full_name='protobuf_unittest.TestMaps.m_sint64', index=5,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_fixed32', full_name='protobuf_unittest.TestMaps.m_fixed32', index=6,
+      number=7, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_fixed64', full_name='protobuf_unittest.TestMaps.m_fixed64', index=7,
+      number=8, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_sfixed32', full_name='protobuf_unittest.TestMaps.m_sfixed32', index=8,
+      number=9, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_sfixed64', full_name='protobuf_unittest.TestMaps.m_sfixed64', index=9,
+      number=10, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_bool', full_name='protobuf_unittest.TestMaps.m_bool', index=10,
+      number=11, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='m_string', full_name='protobuf_unittest.TestMaps.m_string', index=11,
+      number=12, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTMAPS_MINT32ENTRY, _TESTMAPS_MINT64ENTRY, _TESTMAPS_MUINT32ENTRY, _TESTMAPS_MUINT64ENTRY, _TESTMAPS_MSINT32ENTRY, _TESTMAPS_MSINT64ENTRY, _TESTMAPS_MFIXED32ENTRY, _TESTMAPS_MFIXED64ENTRY, _TESTMAPS_MSFIXED32ENTRY, _TESTMAPS_MSFIXED64ENTRY, _TESTMAPS_MBOOLENTRY, _TESTMAPS_MSTRINGENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1162,
+  serialized_end=2882,
+)
+
+
+_TESTSUBMESSAGEMAPS = _descriptor.Descriptor(
+  name='TestSubmessageMaps',
+  full_name='protobuf_unittest.TestSubmessageMaps',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='m', full_name='protobuf_unittest.TestSubmessageMaps.m', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2884,
+  serialized_end=2944,
+)
+
+_TESTENUMMAP_KNOWNMAPFIELDENTRY.fields_by_name['value'].enum_type = _PROTO2MAPENUM
+_TESTENUMMAP_KNOWNMAPFIELDENTRY.containing_type = _TESTENUMMAP
+_TESTENUMMAP_UNKNOWNMAPFIELDENTRY.fields_by_name['value'].enum_type = _PROTO2MAPENUM
+_TESTENUMMAP_UNKNOWNMAPFIELDENTRY.containing_type = _TESTENUMMAP
+_TESTENUMMAP.fields_by_name['known_map_field'].message_type = _TESTENUMMAP_KNOWNMAPFIELDENTRY
+_TESTENUMMAP.fields_by_name['unknown_map_field'].message_type = _TESTENUMMAP_UNKNOWNMAPFIELDENTRY
+_TESTENUMMAPPLUSEXTRA_KNOWNMAPFIELDENTRY.fields_by_name['value'].enum_type = _PROTO2MAPENUMPLUSEXTRA
+_TESTENUMMAPPLUSEXTRA_KNOWNMAPFIELDENTRY.containing_type = _TESTENUMMAPPLUSEXTRA
+_TESTENUMMAPPLUSEXTRA_UNKNOWNMAPFIELDENTRY.fields_by_name['value'].enum_type = _PROTO2MAPENUMPLUSEXTRA
+_TESTENUMMAPPLUSEXTRA_UNKNOWNMAPFIELDENTRY.containing_type = _TESTENUMMAPPLUSEXTRA
+_TESTENUMMAPPLUSEXTRA.fields_by_name['known_map_field'].message_type = _TESTENUMMAPPLUSEXTRA_KNOWNMAPFIELDENTRY
+_TESTENUMMAPPLUSEXTRA.fields_by_name['unknown_map_field'].message_type = _TESTENUMMAPPLUSEXTRA_UNKNOWNMAPFIELDENTRY
+_TESTIMPORTENUMMAP_IMPORTENUMAMPENTRY.fields_by_name['value'].enum_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTENUMFORMAP
+_TESTIMPORTENUMMAP_IMPORTENUMAMPENTRY.containing_type = _TESTIMPORTENUMMAP
+_TESTIMPORTENUMMAP.fields_by_name['import_enum_amp'].message_type = _TESTIMPORTENUMMAP_IMPORTENUMAMPENTRY
+_TESTINTINTMAP_MENTRY.containing_type = _TESTINTINTMAP
+_TESTINTINTMAP.fields_by_name['m'].message_type = _TESTINTINTMAP_MENTRY
+_TESTMAPS_MINT32ENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MINT32ENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MINT64ENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MINT64ENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MUINT32ENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MUINT32ENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MUINT64ENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MUINT64ENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MSINT32ENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MSINT32ENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MSINT64ENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MSINT64ENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MFIXED32ENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MFIXED32ENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MFIXED64ENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MFIXED64ENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MSFIXED32ENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MSFIXED32ENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MSFIXED64ENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MSFIXED64ENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MBOOLENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MBOOLENTRY.containing_type = _TESTMAPS
+_TESTMAPS_MSTRINGENTRY.fields_by_name['value'].message_type = _TESTINTINTMAP
+_TESTMAPS_MSTRINGENTRY.containing_type = _TESTMAPS
+_TESTMAPS.fields_by_name['m_int32'].message_type = _TESTMAPS_MINT32ENTRY
+_TESTMAPS.fields_by_name['m_int64'].message_type = _TESTMAPS_MINT64ENTRY
+_TESTMAPS.fields_by_name['m_uint32'].message_type = _TESTMAPS_MUINT32ENTRY
+_TESTMAPS.fields_by_name['m_uint64'].message_type = _TESTMAPS_MUINT64ENTRY
+_TESTMAPS.fields_by_name['m_sint32'].message_type = _TESTMAPS_MSINT32ENTRY
+_TESTMAPS.fields_by_name['m_sint64'].message_type = _TESTMAPS_MSINT64ENTRY
+_TESTMAPS.fields_by_name['m_fixed32'].message_type = _TESTMAPS_MFIXED32ENTRY
+_TESTMAPS.fields_by_name['m_fixed64'].message_type = _TESTMAPS_MFIXED64ENTRY
+_TESTMAPS.fields_by_name['m_sfixed32'].message_type = _TESTMAPS_MSFIXED32ENTRY
+_TESTMAPS.fields_by_name['m_sfixed64'].message_type = _TESTMAPS_MSFIXED64ENTRY
+_TESTMAPS.fields_by_name['m_bool'].message_type = _TESTMAPS_MBOOLENTRY
+_TESTMAPS.fields_by_name['m_string'].message_type = _TESTMAPS_MSTRINGENTRY
+_TESTSUBMESSAGEMAPS.fields_by_name['m'].message_type = _TESTMAPS
+DESCRIPTOR.message_types_by_name['TestEnumMap'] = _TESTENUMMAP
+DESCRIPTOR.message_types_by_name['TestEnumMapPlusExtra'] = _TESTENUMMAPPLUSEXTRA
+DESCRIPTOR.message_types_by_name['TestImportEnumMap'] = _TESTIMPORTENUMMAP
+DESCRIPTOR.message_types_by_name['TestIntIntMap'] = _TESTINTINTMAP
+DESCRIPTOR.message_types_by_name['TestMaps'] = _TESTMAPS
+DESCRIPTOR.message_types_by_name['TestSubmessageMaps'] = _TESTSUBMESSAGEMAPS
+DESCRIPTOR.enum_types_by_name['Proto2MapEnum'] = _PROTO2MAPENUM
+DESCRIPTOR.enum_types_by_name['Proto2MapEnumPlusExtra'] = _PROTO2MAPENUMPLUSEXTRA
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestEnumMap = _reflection.GeneratedProtocolMessageType('TestEnumMap', (_message.Message,), {
+
+  'KnownMapFieldEntry' : _reflection.GeneratedProtocolMessageType('KnownMapFieldEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTENUMMAP_KNOWNMAPFIELDENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestEnumMap.KnownMapFieldEntry)
+    })
+  ,
+
+  'UnknownMapFieldEntry' : _reflection.GeneratedProtocolMessageType('UnknownMapFieldEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTENUMMAP_UNKNOWNMAPFIELDENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestEnumMap.UnknownMapFieldEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTENUMMAP,
+  '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestEnumMap)
+  })
+_sym_db.RegisterMessage(TestEnumMap)
+_sym_db.RegisterMessage(TestEnumMap.KnownMapFieldEntry)
+_sym_db.RegisterMessage(TestEnumMap.UnknownMapFieldEntry)
+
+TestEnumMapPlusExtra = _reflection.GeneratedProtocolMessageType('TestEnumMapPlusExtra', (_message.Message,), {
+
+  'KnownMapFieldEntry' : _reflection.GeneratedProtocolMessageType('KnownMapFieldEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTENUMMAPPLUSEXTRA_KNOWNMAPFIELDENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestEnumMapPlusExtra.KnownMapFieldEntry)
+    })
+  ,
+
+  'UnknownMapFieldEntry' : _reflection.GeneratedProtocolMessageType('UnknownMapFieldEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTENUMMAPPLUSEXTRA_UNKNOWNMAPFIELDENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestEnumMapPlusExtra.UnknownMapFieldEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTENUMMAPPLUSEXTRA,
+  '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestEnumMapPlusExtra)
+  })
+_sym_db.RegisterMessage(TestEnumMapPlusExtra)
+_sym_db.RegisterMessage(TestEnumMapPlusExtra.KnownMapFieldEntry)
+_sym_db.RegisterMessage(TestEnumMapPlusExtra.UnknownMapFieldEntry)
+
+TestImportEnumMap = _reflection.GeneratedProtocolMessageType('TestImportEnumMap', (_message.Message,), {
+
+  'ImportEnumAmpEntry' : _reflection.GeneratedProtocolMessageType('ImportEnumAmpEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTIMPORTENUMMAP_IMPORTENUMAMPENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestImportEnumMap.ImportEnumAmpEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTIMPORTENUMMAP,
+  '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestImportEnumMap)
+  })
+_sym_db.RegisterMessage(TestImportEnumMap)
+_sym_db.RegisterMessage(TestImportEnumMap.ImportEnumAmpEntry)
+
+TestIntIntMap = _reflection.GeneratedProtocolMessageType('TestIntIntMap', (_message.Message,), {
+
+  'MEntry' : _reflection.GeneratedProtocolMessageType('MEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTINTINTMAP_MENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestIntIntMap.MEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTINTINTMAP,
+  '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestIntIntMap)
+  })
+_sym_db.RegisterMessage(TestIntIntMap)
+_sym_db.RegisterMessage(TestIntIntMap.MEntry)
+
+TestMaps = _reflection.GeneratedProtocolMessageType('TestMaps', (_message.Message,), {
+
+  'MInt32Entry' : _reflection.GeneratedProtocolMessageType('MInt32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MINT32ENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MInt32Entry)
+    })
+  ,
+
+  'MInt64Entry' : _reflection.GeneratedProtocolMessageType('MInt64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MINT64ENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MInt64Entry)
+    })
+  ,
+
+  'MUint32Entry' : _reflection.GeneratedProtocolMessageType('MUint32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MUINT32ENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MUint32Entry)
+    })
+  ,
+
+  'MUint64Entry' : _reflection.GeneratedProtocolMessageType('MUint64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MUINT64ENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MUint64Entry)
+    })
+  ,
+
+  'MSint32Entry' : _reflection.GeneratedProtocolMessageType('MSint32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MSINT32ENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MSint32Entry)
+    })
+  ,
+
+  'MSint64Entry' : _reflection.GeneratedProtocolMessageType('MSint64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MSINT64ENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MSint64Entry)
+    })
+  ,
+
+  'MFixed32Entry' : _reflection.GeneratedProtocolMessageType('MFixed32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MFIXED32ENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MFixed32Entry)
+    })
+  ,
+
+  'MFixed64Entry' : _reflection.GeneratedProtocolMessageType('MFixed64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MFIXED64ENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MFixed64Entry)
+    })
+  ,
+
+  'MSfixed32Entry' : _reflection.GeneratedProtocolMessageType('MSfixed32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MSFIXED32ENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MSfixed32Entry)
+    })
+  ,
+
+  'MSfixed64Entry' : _reflection.GeneratedProtocolMessageType('MSfixed64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MSFIXED64ENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MSfixed64Entry)
+    })
+  ,
+
+  'MBoolEntry' : _reflection.GeneratedProtocolMessageType('MBoolEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MBOOLENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MBoolEntry)
+    })
+  ,
+
+  'MStringEntry' : _reflection.GeneratedProtocolMessageType('MStringEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAPS_MSTRINGENTRY,
+    '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps.MStringEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTMAPS,
+  '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMaps)
+  })
+_sym_db.RegisterMessage(TestMaps)
+_sym_db.RegisterMessage(TestMaps.MInt32Entry)
+_sym_db.RegisterMessage(TestMaps.MInt64Entry)
+_sym_db.RegisterMessage(TestMaps.MUint32Entry)
+_sym_db.RegisterMessage(TestMaps.MUint64Entry)
+_sym_db.RegisterMessage(TestMaps.MSint32Entry)
+_sym_db.RegisterMessage(TestMaps.MSint64Entry)
+_sym_db.RegisterMessage(TestMaps.MFixed32Entry)
+_sym_db.RegisterMessage(TestMaps.MFixed64Entry)
+_sym_db.RegisterMessage(TestMaps.MSfixed32Entry)
+_sym_db.RegisterMessage(TestMaps.MSfixed64Entry)
+_sym_db.RegisterMessage(TestMaps.MBoolEntry)
+_sym_db.RegisterMessage(TestMaps.MStringEntry)
+
+TestSubmessageMaps = _reflection.GeneratedProtocolMessageType('TestSubmessageMaps', (_message.Message,), {
+  'DESCRIPTOR' : _TESTSUBMESSAGEMAPS,
+  '__module__' : 'google.protobuf.map_proto2_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestSubmessageMaps)
+  })
+_sym_db.RegisterMessage(TestSubmessageMaps)
+
+
+DESCRIPTOR._options = None
+_TESTENUMMAP_KNOWNMAPFIELDENTRY._options = None
+_TESTENUMMAP_UNKNOWNMAPFIELDENTRY._options = None
+_TESTENUMMAPPLUSEXTRA_KNOWNMAPFIELDENTRY._options = None
+_TESTENUMMAPPLUSEXTRA_UNKNOWNMAPFIELDENTRY._options = None
+_TESTIMPORTENUMMAP_IMPORTENUMAMPENTRY._options = None
+_TESTINTINTMAP_MENTRY._options = None
+_TESTMAPS_MINT32ENTRY._options = None
+_TESTMAPS_MINT64ENTRY._options = None
+_TESTMAPS_MUINT32ENTRY._options = None
+_TESTMAPS_MUINT64ENTRY._options = None
+_TESTMAPS_MSINT32ENTRY._options = None
+_TESTMAPS_MSINT64ENTRY._options = None
+_TESTMAPS_MFIXED32ENTRY._options = None
+_TESTMAPS_MFIXED64ENTRY._options = None
+_TESTMAPS_MSFIXED32ENTRY._options = None
+_TESTMAPS_MSFIXED64ENTRY._options = None
+_TESTMAPS_MBOOLENTRY._options = None
+_TESTMAPS_MSTRINGENTRY._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/map_unittest_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/map_unittest_pb2.py
new file mode 100644
index 0000000..0424004
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/map_unittest_pb2.py
@@ -0,0 +1,2814 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/map_unittest.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import unittest_pb2 as google_dot_protobuf_dot_unittest__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/map_unittest.proto',
+  package='protobuf_unittest',
+  syntax='proto3',
+  serialized_options=b'\370\001\001',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\"google/protobuf/map_unittest.proto\x12\x11protobuf_unittest\x1a\x1egoogle/protobuf/unittest.proto\"\xff\x14\n\x07TestMap\x12\x46\n\x0fmap_int32_int32\x18\x01 \x03(\x0b\x32-.protobuf_unittest.TestMap.MapInt32Int32Entry\x12\x46\n\x0fmap_int64_int64\x18\x02 \x03(\x0b\x32-.protobuf_unittest.TestMap.MapInt64Int64Entry\x12J\n\x11map_uint32_uint32\x18\x03 \x03(\x0b\x32/.protobuf_unittest.TestMap.MapUint32Uint32Entry\x12J\n\x11map_uint64_uint64\x18\x04 \x03(\x0b\x32/.protobuf_unittest.TestMap.MapUint64Uint64Entry\x12J\n\x11map_sint32_sint32\x18\x05 \x03(\x0b\x32/.protobuf_unittest.TestMap.MapSint32Sint32Entry\x12J\n\x11map_sint64_sint64\x18\x06 \x03(\x0b\x32/.protobuf_unittest.TestMap.MapSint64Sint64Entry\x12N\n\x13map_fixed32_fixed32\x18\x07 \x03(\x0b\x32\x31.protobuf_unittest.TestMap.MapFixed32Fixed32Entry\x12N\n\x13map_fixed64_fixed64\x18\x08 \x03(\x0b\x32\x31.protobuf_unittest.TestMap.MapFixed64Fixed64Entry\x12R\n\x15map_sfixed32_sfixed32\x18\t 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+  ,
+  dependencies=[google_dot_protobuf_dot_unittest__pb2.DESCRIPTOR,])
+
+_MAPENUM = _descriptor.EnumDescriptor(
+  name='MapEnum',
+  full_name='protobuf_unittest.MapEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='MAP_ENUM_FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='MAP_ENUM_BAR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='MAP_ENUM_BAZ', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=6438,
+  serialized_end=6501,
+)
+_sym_db.RegisterEnumDescriptor(_MAPENUM)
+
+MapEnum = enum_type_wrapper.EnumTypeWrapper(_MAPENUM)
+MAP_ENUM_FOO = 0
+MAP_ENUM_BAR = 1
+MAP_ENUM_BAZ = 2
+
+
+_MESSAGECONTAININGENUMCALLEDTYPE_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='protobuf_unittest.MessageContainingEnumCalledType.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=6080,
+  serialized_end=6100,
+)
+_sym_db.RegisterEnumDescriptor(_MESSAGECONTAININGENUMCALLEDTYPE_TYPE)
+
+
+_TESTMAP_MAPINT32INT32ENTRY = _descriptor.Descriptor(
+  name='MapInt32Int32Entry',
+  full_name='protobuf_unittest.TestMap.MapInt32Int32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapInt32Int32Entry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapInt32Int32Entry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1572,
+  serialized_end=1624,
+)
+
+_TESTMAP_MAPINT64INT64ENTRY = _descriptor.Descriptor(
+  name='MapInt64Int64Entry',
+  full_name='protobuf_unittest.TestMap.MapInt64Int64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapInt64Int64Entry.key', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapInt64Int64Entry.value', index=1,
+      number=2, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1626,
+  serialized_end=1678,
+)
+
+_TESTMAP_MAPUINT32UINT32ENTRY = _descriptor.Descriptor(
+  name='MapUint32Uint32Entry',
+  full_name='protobuf_unittest.TestMap.MapUint32Uint32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapUint32Uint32Entry.key', index=0,
+      number=1, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapUint32Uint32Entry.value', index=1,
+      number=2, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1680,
+  serialized_end=1734,
+)
+
+_TESTMAP_MAPUINT64UINT64ENTRY = _descriptor.Descriptor(
+  name='MapUint64Uint64Entry',
+  full_name='protobuf_unittest.TestMap.MapUint64Uint64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapUint64Uint64Entry.key', index=0,
+      number=1, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapUint64Uint64Entry.value', index=1,
+      number=2, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1736,
+  serialized_end=1790,
+)
+
+_TESTMAP_MAPSINT32SINT32ENTRY = _descriptor.Descriptor(
+  name='MapSint32Sint32Entry',
+  full_name='protobuf_unittest.TestMap.MapSint32Sint32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapSint32Sint32Entry.key', index=0,
+      number=1, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapSint32Sint32Entry.value', index=1,
+      number=2, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1792,
+  serialized_end=1846,
+)
+
+_TESTMAP_MAPSINT64SINT64ENTRY = _descriptor.Descriptor(
+  name='MapSint64Sint64Entry',
+  full_name='protobuf_unittest.TestMap.MapSint64Sint64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapSint64Sint64Entry.key', index=0,
+      number=1, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapSint64Sint64Entry.value', index=1,
+      number=2, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1848,
+  serialized_end=1902,
+)
+
+_TESTMAP_MAPFIXED32FIXED32ENTRY = _descriptor.Descriptor(
+  name='MapFixed32Fixed32Entry',
+  full_name='protobuf_unittest.TestMap.MapFixed32Fixed32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapFixed32Fixed32Entry.key', index=0,
+      number=1, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapFixed32Fixed32Entry.value', index=1,
+      number=2, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1904,
+  serialized_end=1960,
+)
+
+_TESTMAP_MAPFIXED64FIXED64ENTRY = _descriptor.Descriptor(
+  name='MapFixed64Fixed64Entry',
+  full_name='protobuf_unittest.TestMap.MapFixed64Fixed64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapFixed64Fixed64Entry.key', index=0,
+      number=1, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapFixed64Fixed64Entry.value', index=1,
+      number=2, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1962,
+  serialized_end=2018,
+)
+
+_TESTMAP_MAPSFIXED32SFIXED32ENTRY = _descriptor.Descriptor(
+  name='MapSfixed32Sfixed32Entry',
+  full_name='protobuf_unittest.TestMap.MapSfixed32Sfixed32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapSfixed32Sfixed32Entry.key', index=0,
+      number=1, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapSfixed32Sfixed32Entry.value', index=1,
+      number=2, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2020,
+  serialized_end=2078,
+)
+
+_TESTMAP_MAPSFIXED64SFIXED64ENTRY = _descriptor.Descriptor(
+  name='MapSfixed64Sfixed64Entry',
+  full_name='protobuf_unittest.TestMap.MapSfixed64Sfixed64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapSfixed64Sfixed64Entry.key', index=0,
+      number=1, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapSfixed64Sfixed64Entry.value', index=1,
+      number=2, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2080,
+  serialized_end=2138,
+)
+
+_TESTMAP_MAPINT32FLOATENTRY = _descriptor.Descriptor(
+  name='MapInt32FloatEntry',
+  full_name='protobuf_unittest.TestMap.MapInt32FloatEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapInt32FloatEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapInt32FloatEntry.value', index=1,
+      number=2, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2140,
+  serialized_end=2192,
+)
+
+_TESTMAP_MAPINT32DOUBLEENTRY = _descriptor.Descriptor(
+  name='MapInt32DoubleEntry',
+  full_name='protobuf_unittest.TestMap.MapInt32DoubleEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapInt32DoubleEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapInt32DoubleEntry.value', index=1,
+      number=2, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2194,
+  serialized_end=2247,
+)
+
+_TESTMAP_MAPBOOLBOOLENTRY = _descriptor.Descriptor(
+  name='MapBoolBoolEntry',
+  full_name='protobuf_unittest.TestMap.MapBoolBoolEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapBoolBoolEntry.key', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapBoolBoolEntry.value', index=1,
+      number=2, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2249,
+  serialized_end=2299,
+)
+
+_TESTMAP_MAPSTRINGSTRINGENTRY = _descriptor.Descriptor(
+  name='MapStringStringEntry',
+  full_name='protobuf_unittest.TestMap.MapStringStringEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapStringStringEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapStringStringEntry.value', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2301,
+  serialized_end=2355,
+)
+
+_TESTMAP_MAPINT32BYTESENTRY = _descriptor.Descriptor(
+  name='MapInt32BytesEntry',
+  full_name='protobuf_unittest.TestMap.MapInt32BytesEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapInt32BytesEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapInt32BytesEntry.value', index=1,
+      number=2, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2357,
+  serialized_end=2409,
+)
+
+_TESTMAP_MAPINT32ENUMENTRY = _descriptor.Descriptor(
+  name='MapInt32EnumEntry',
+  full_name='protobuf_unittest.TestMap.MapInt32EnumEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapInt32EnumEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapInt32EnumEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2411,
+  serialized_end=2490,
+)
+
+_TESTMAP_MAPINT32FOREIGNMESSAGEENTRY = _descriptor.Descriptor(
+  name='MapInt32ForeignMessageEntry',
+  full_name='protobuf_unittest.TestMap.MapInt32ForeignMessageEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapInt32ForeignMessageEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapInt32ForeignMessageEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2492,
+  serialized_end=2588,
+)
+
+_TESTMAP_MAPSTRINGFOREIGNMESSAGEENTRY = _descriptor.Descriptor(
+  name='MapStringForeignMessageEntry',
+  full_name='protobuf_unittest.TestMap.MapStringForeignMessageEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapStringForeignMessageEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapStringForeignMessageEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2590,
+  serialized_end=2687,
+)
+
+_TESTMAP_MAPINT32ALLTYPESENTRY = _descriptor.Descriptor(
+  name='MapInt32AllTypesEntry',
+  full_name='protobuf_unittest.TestMap.MapInt32AllTypesEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMap.MapInt32AllTypesEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMap.MapInt32AllTypesEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2689,
+  serialized_end=2777,
+)
+
+_TESTMAP = _descriptor.Descriptor(
+  name='TestMap',
+  full_name='protobuf_unittest.TestMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='map_int32_int32', full_name='protobuf_unittest.TestMap.map_int32_int32', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int64_int64', full_name='protobuf_unittest.TestMap.map_int64_int64', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_uint32_uint32', full_name='protobuf_unittest.TestMap.map_uint32_uint32', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_uint64_uint64', full_name='protobuf_unittest.TestMap.map_uint64_uint64', index=3,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sint32_sint32', full_name='protobuf_unittest.TestMap.map_sint32_sint32', index=4,
+      number=5, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sint64_sint64', full_name='protobuf_unittest.TestMap.map_sint64_sint64', index=5,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_fixed32_fixed32', full_name='protobuf_unittest.TestMap.map_fixed32_fixed32', index=6,
+      number=7, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_fixed64_fixed64', full_name='protobuf_unittest.TestMap.map_fixed64_fixed64', index=7,
+      number=8, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sfixed32_sfixed32', full_name='protobuf_unittest.TestMap.map_sfixed32_sfixed32', index=8,
+      number=9, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sfixed64_sfixed64', full_name='protobuf_unittest.TestMap.map_sfixed64_sfixed64', index=9,
+      number=10, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_float', full_name='protobuf_unittest.TestMap.map_int32_float', index=10,
+      number=11, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_double', full_name='protobuf_unittest.TestMap.map_int32_double', index=11,
+      number=12, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_bool_bool', full_name='protobuf_unittest.TestMap.map_bool_bool', index=12,
+      number=13, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_string', full_name='protobuf_unittest.TestMap.map_string_string', index=13,
+      number=14, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_bytes', full_name='protobuf_unittest.TestMap.map_int32_bytes', index=14,
+      number=15, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_enum', full_name='protobuf_unittest.TestMap.map_int32_enum', index=15,
+      number=16, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_foreign_message', full_name='protobuf_unittest.TestMap.map_int32_foreign_message', index=16,
+      number=17, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_foreign_message', full_name='protobuf_unittest.TestMap.map_string_foreign_message', index=17,
+      number=18, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_all_types', full_name='protobuf_unittest.TestMap.map_int32_all_types', index=18,
+      number=19, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTMAP_MAPINT32INT32ENTRY, _TESTMAP_MAPINT64INT64ENTRY, _TESTMAP_MAPUINT32UINT32ENTRY, _TESTMAP_MAPUINT64UINT64ENTRY, _TESTMAP_MAPSINT32SINT32ENTRY, _TESTMAP_MAPSINT64SINT64ENTRY, _TESTMAP_MAPFIXED32FIXED32ENTRY, _TESTMAP_MAPFIXED64FIXED64ENTRY, _TESTMAP_MAPSFIXED32SFIXED32ENTRY, _TESTMAP_MAPSFIXED64SFIXED64ENTRY, _TESTMAP_MAPINT32FLOATENTRY, _TESTMAP_MAPINT32DOUBLEENTRY, _TESTMAP_MAPBOOLBOOLENTRY, _TESTMAP_MAPSTRINGSTRINGENTRY, _TESTMAP_MAPINT32BYTESENTRY, _TESTMAP_MAPINT32ENUMENTRY, _TESTMAP_MAPINT32FOREIGNMESSAGEENTRY, _TESTMAP_MAPSTRINGFOREIGNMESSAGEENTRY, _TESTMAP_MAPINT32ALLTYPESENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=90,
+  serialized_end=2777,
+)
+
+
+_TESTMAPSUBMESSAGE = _descriptor.Descriptor(
+  name='TestMapSubmessage',
+  full_name='protobuf_unittest.TestMapSubmessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='test_map', full_name='protobuf_unittest.TestMapSubmessage.test_map', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2779,
+  serialized_end=2844,
+)
+
+
+_TESTMESSAGEMAP_MAPINT32MESSAGEENTRY = _descriptor.Descriptor(
+  name='MapInt32MessageEntry',
+  full_name='protobuf_unittest.TestMessageMap.MapInt32MessageEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestMessageMap.MapInt32MessageEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestMessageMap.MapInt32MessageEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2948,
+  serialized_end=3035,
+)
+
+_TESTMESSAGEMAP = _descriptor.Descriptor(
+  name='TestMessageMap',
+  full_name='protobuf_unittest.TestMessageMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='map_int32_message', full_name='protobuf_unittest.TestMessageMap.map_int32_message', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTMESSAGEMAP_MAPINT32MESSAGEENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2847,
+  serialized_end=3035,
+)
+
+
+_TESTSAMETYPEMAP_MAP1ENTRY = _descriptor.Descriptor(
+  name='Map1Entry',
+  full_name='protobuf_unittest.TestSameTypeMap.Map1Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestSameTypeMap.Map1Entry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestSameTypeMap.Map1Entry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3177,
+  serialized_end=3220,
+)
+
+_TESTSAMETYPEMAP_MAP2ENTRY = _descriptor.Descriptor(
+  name='Map2Entry',
+  full_name='protobuf_unittest.TestSameTypeMap.Map2Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestSameTypeMap.Map2Entry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestSameTypeMap.Map2Entry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3222,
+  serialized_end=3265,
+)
+
+_TESTSAMETYPEMAP = _descriptor.Descriptor(
+  name='TestSameTypeMap',
+  full_name='protobuf_unittest.TestSameTypeMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='map1', full_name='protobuf_unittest.TestSameTypeMap.map1', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map2', full_name='protobuf_unittest.TestSameTypeMap.map2', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTSAMETYPEMAP_MAP1ENTRY, _TESTSAMETYPEMAP_MAP2ENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3038,
+  serialized_end=3265,
+)
+
+
+_TESTREQUIREDMESSAGEMAP_MAPFIELDENTRY = _descriptor.Descriptor(
+  name='MapFieldEntry',
+  full_name='protobuf_unittest.TestRequiredMessageMap.MapFieldEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestRequiredMessageMap.MapFieldEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestRequiredMessageMap.MapFieldEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3370,
+  serialized_end=3450,
+)
+
+_TESTREQUIREDMESSAGEMAP = _descriptor.Descriptor(
+  name='TestRequiredMessageMap',
+  full_name='protobuf_unittest.TestRequiredMessageMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='map_field', full_name='protobuf_unittest.TestRequiredMessageMap.map_field', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTREQUIREDMESSAGEMAP_MAPFIELDENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3268,
+  serialized_end=3450,
+)
+
+
+_TESTARENAMAP_MAPINT32INT32ENTRY = _descriptor.Descriptor(
+  name='MapInt32Int32Entry',
+  full_name='protobuf_unittest.TestArenaMap.MapInt32Int32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapInt32Int32Entry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapInt32Int32Entry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1572,
+  serialized_end=1624,
+)
+
+_TESTARENAMAP_MAPINT64INT64ENTRY = _descriptor.Descriptor(
+  name='MapInt64Int64Entry',
+  full_name='protobuf_unittest.TestArenaMap.MapInt64Int64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapInt64Int64Entry.key', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapInt64Int64Entry.value', index=1,
+      number=2, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1626,
+  serialized_end=1678,
+)
+
+_TESTARENAMAP_MAPUINT32UINT32ENTRY = _descriptor.Descriptor(
+  name='MapUint32Uint32Entry',
+  full_name='protobuf_unittest.TestArenaMap.MapUint32Uint32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapUint32Uint32Entry.key', index=0,
+      number=1, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapUint32Uint32Entry.value', index=1,
+      number=2, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1680,
+  serialized_end=1734,
+)
+
+_TESTARENAMAP_MAPUINT64UINT64ENTRY = _descriptor.Descriptor(
+  name='MapUint64Uint64Entry',
+  full_name='protobuf_unittest.TestArenaMap.MapUint64Uint64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapUint64Uint64Entry.key', index=0,
+      number=1, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapUint64Uint64Entry.value', index=1,
+      number=2, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1736,
+  serialized_end=1790,
+)
+
+_TESTARENAMAP_MAPSINT32SINT32ENTRY = _descriptor.Descriptor(
+  name='MapSint32Sint32Entry',
+  full_name='protobuf_unittest.TestArenaMap.MapSint32Sint32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapSint32Sint32Entry.key', index=0,
+      number=1, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapSint32Sint32Entry.value', index=1,
+      number=2, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1792,
+  serialized_end=1846,
+)
+
+_TESTARENAMAP_MAPSINT64SINT64ENTRY = _descriptor.Descriptor(
+  name='MapSint64Sint64Entry',
+  full_name='protobuf_unittest.TestArenaMap.MapSint64Sint64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapSint64Sint64Entry.key', index=0,
+      number=1, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapSint64Sint64Entry.value', index=1,
+      number=2, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1848,
+  serialized_end=1902,
+)
+
+_TESTARENAMAP_MAPFIXED32FIXED32ENTRY = _descriptor.Descriptor(
+  name='MapFixed32Fixed32Entry',
+  full_name='protobuf_unittest.TestArenaMap.MapFixed32Fixed32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapFixed32Fixed32Entry.key', index=0,
+      number=1, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapFixed32Fixed32Entry.value', index=1,
+      number=2, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1904,
+  serialized_end=1960,
+)
+
+_TESTARENAMAP_MAPFIXED64FIXED64ENTRY = _descriptor.Descriptor(
+  name='MapFixed64Fixed64Entry',
+  full_name='protobuf_unittest.TestArenaMap.MapFixed64Fixed64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapFixed64Fixed64Entry.key', index=0,
+      number=1, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapFixed64Fixed64Entry.value', index=1,
+      number=2, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1962,
+  serialized_end=2018,
+)
+
+_TESTARENAMAP_MAPSFIXED32SFIXED32ENTRY = _descriptor.Descriptor(
+  name='MapSfixed32Sfixed32Entry',
+  full_name='protobuf_unittest.TestArenaMap.MapSfixed32Sfixed32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapSfixed32Sfixed32Entry.key', index=0,
+      number=1, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapSfixed32Sfixed32Entry.value', index=1,
+      number=2, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2020,
+  serialized_end=2078,
+)
+
+_TESTARENAMAP_MAPSFIXED64SFIXED64ENTRY = _descriptor.Descriptor(
+  name='MapSfixed64Sfixed64Entry',
+  full_name='protobuf_unittest.TestArenaMap.MapSfixed64Sfixed64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapSfixed64Sfixed64Entry.key', index=0,
+      number=1, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapSfixed64Sfixed64Entry.value', index=1,
+      number=2, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2080,
+  serialized_end=2138,
+)
+
+_TESTARENAMAP_MAPINT32FLOATENTRY = _descriptor.Descriptor(
+  name='MapInt32FloatEntry',
+  full_name='protobuf_unittest.TestArenaMap.MapInt32FloatEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapInt32FloatEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapInt32FloatEntry.value', index=1,
+      number=2, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2140,
+  serialized_end=2192,
+)
+
+_TESTARENAMAP_MAPINT32DOUBLEENTRY = _descriptor.Descriptor(
+  name='MapInt32DoubleEntry',
+  full_name='protobuf_unittest.TestArenaMap.MapInt32DoubleEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapInt32DoubleEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapInt32DoubleEntry.value', index=1,
+      number=2, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2194,
+  serialized_end=2247,
+)
+
+_TESTARENAMAP_MAPBOOLBOOLENTRY = _descriptor.Descriptor(
+  name='MapBoolBoolEntry',
+  full_name='protobuf_unittest.TestArenaMap.MapBoolBoolEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapBoolBoolEntry.key', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapBoolBoolEntry.value', index=1,
+      number=2, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2249,
+  serialized_end=2299,
+)
+
+_TESTARENAMAP_MAPSTRINGSTRINGENTRY = _descriptor.Descriptor(
+  name='MapStringStringEntry',
+  full_name='protobuf_unittest.TestArenaMap.MapStringStringEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapStringStringEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapStringStringEntry.value', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2301,
+  serialized_end=2355,
+)
+
+_TESTARENAMAP_MAPINT32BYTESENTRY = _descriptor.Descriptor(
+  name='MapInt32BytesEntry',
+  full_name='protobuf_unittest.TestArenaMap.MapInt32BytesEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapInt32BytesEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapInt32BytesEntry.value', index=1,
+      number=2, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2357,
+  serialized_end=2409,
+)
+
+_TESTARENAMAP_MAPINT32ENUMENTRY = _descriptor.Descriptor(
+  name='MapInt32EnumEntry',
+  full_name='protobuf_unittest.TestArenaMap.MapInt32EnumEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapInt32EnumEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapInt32EnumEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2411,
+  serialized_end=2490,
+)
+
+_TESTARENAMAP_MAPINT32FOREIGNMESSAGEENTRY = _descriptor.Descriptor(
+  name='MapInt32ForeignMessageEntry',
+  full_name='protobuf_unittest.TestArenaMap.MapInt32ForeignMessageEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestArenaMap.MapInt32ForeignMessageEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestArenaMap.MapInt32ForeignMessageEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2492,
+  serialized_end=2588,
+)
+
+_TESTARENAMAP = _descriptor.Descriptor(
+  name='TestArenaMap',
+  full_name='protobuf_unittest.TestArenaMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='map_int32_int32', full_name='protobuf_unittest.TestArenaMap.map_int32_int32', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int64_int64', full_name='protobuf_unittest.TestArenaMap.map_int64_int64', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_uint32_uint32', full_name='protobuf_unittest.TestArenaMap.map_uint32_uint32', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_uint64_uint64', full_name='protobuf_unittest.TestArenaMap.map_uint64_uint64', index=3,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sint32_sint32', full_name='protobuf_unittest.TestArenaMap.map_sint32_sint32', index=4,
+      number=5, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sint64_sint64', full_name='protobuf_unittest.TestArenaMap.map_sint64_sint64', index=5,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_fixed32_fixed32', full_name='protobuf_unittest.TestArenaMap.map_fixed32_fixed32', index=6,
+      number=7, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_fixed64_fixed64', full_name='protobuf_unittest.TestArenaMap.map_fixed64_fixed64', index=7,
+      number=8, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sfixed32_sfixed32', full_name='protobuf_unittest.TestArenaMap.map_sfixed32_sfixed32', index=8,
+      number=9, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sfixed64_sfixed64', full_name='protobuf_unittest.TestArenaMap.map_sfixed64_sfixed64', index=9,
+      number=10, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_float', full_name='protobuf_unittest.TestArenaMap.map_int32_float', index=10,
+      number=11, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_double', full_name='protobuf_unittest.TestArenaMap.map_int32_double', index=11,
+      number=12, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_bool_bool', full_name='protobuf_unittest.TestArenaMap.map_bool_bool', index=12,
+      number=13, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_string', full_name='protobuf_unittest.TestArenaMap.map_string_string', index=13,
+      number=14, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_bytes', full_name='protobuf_unittest.TestArenaMap.map_int32_bytes', index=14,
+      number=15, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_enum', full_name='protobuf_unittest.TestArenaMap.map_int32_enum', index=15,
+      number=16, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_foreign_message', full_name='protobuf_unittest.TestArenaMap.map_int32_foreign_message', index=16,
+      number=17, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTARENAMAP_MAPINT32INT32ENTRY, _TESTARENAMAP_MAPINT64INT64ENTRY, _TESTARENAMAP_MAPUINT32UINT32ENTRY, _TESTARENAMAP_MAPUINT64UINT64ENTRY, _TESTARENAMAP_MAPSINT32SINT32ENTRY, _TESTARENAMAP_MAPSINT64SINT64ENTRY, _TESTARENAMAP_MAPFIXED32FIXED32ENTRY, _TESTARENAMAP_MAPFIXED64FIXED64ENTRY, _TESTARENAMAP_MAPSFIXED32SFIXED32ENTRY, _TESTARENAMAP_MAPSFIXED64SFIXED64ENTRY, _TESTARENAMAP_MAPINT32FLOATENTRY, _TESTARENAMAP_MAPINT32DOUBLEENTRY, _TESTARENAMAP_MAPBOOLBOOLENTRY, _TESTARENAMAP_MAPSTRINGSTRINGENTRY, _TESTARENAMAP_MAPINT32BYTESENTRY, _TESTARENAMAP_MAPINT32ENUMENTRY, _TESTARENAMAP_MAPINT32FOREIGNMESSAGEENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3453,
+  serialized_end=5869,
+)
+
+
+_MESSAGECONTAININGENUMCALLEDTYPE_TYPEENTRY = _descriptor.Descriptor(
+  name='TypeEntry',
+  full_name='protobuf_unittest.MessageContainingEnumCalledType.TypeEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.MessageContainingEnumCalledType.TypeEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.MessageContainingEnumCalledType.TypeEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5983,
+  serialized_end=6078,
+)
+
+_MESSAGECONTAININGENUMCALLEDTYPE = _descriptor.Descriptor(
+  name='MessageContainingEnumCalledType',
+  full_name='protobuf_unittest.MessageContainingEnumCalledType',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='protobuf_unittest.MessageContainingEnumCalledType.type', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_MESSAGECONTAININGENUMCALLEDTYPE_TYPEENTRY, ],
+  enum_types=[
+    _MESSAGECONTAININGENUMCALLEDTYPE_TYPE,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5872,
+  serialized_end=6100,
+)
+
+
+_MESSAGECONTAININGMAPCALLEDENTRY_ENTRYENTRY = _descriptor.Descriptor(
+  name='EntryEntry',
+  full_name='protobuf_unittest.MessageContainingMapCalledEntry.EntryEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.MessageContainingMapCalledEntry.EntryEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.MessageContainingMapCalledEntry.EntryEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6216,
+  serialized_end=6260,
+)
+
+_MESSAGECONTAININGMAPCALLEDENTRY = _descriptor.Descriptor(
+  name='MessageContainingMapCalledEntry',
+  full_name='protobuf_unittest.MessageContainingMapCalledEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='entry', full_name='protobuf_unittest.MessageContainingMapCalledEntry.entry', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_MESSAGECONTAININGMAPCALLEDENTRY_ENTRYENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6103,
+  serialized_end=6260,
+)
+
+
+_TESTRECURSIVEMAPMESSAGE_AENTRY = _descriptor.Descriptor(
+  name='AEntry',
+  full_name='protobuf_unittest.TestRecursiveMapMessage.AEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestRecursiveMapMessage.AEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestRecursiveMapMessage.AEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6352,
+  serialized_end=6436,
+)
+
+_TESTRECURSIVEMAPMESSAGE = _descriptor.Descriptor(
+  name='TestRecursiveMapMessage',
+  full_name='protobuf_unittest.TestRecursiveMapMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestRecursiveMapMessage.a', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTRECURSIVEMAPMESSAGE_AENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6263,
+  serialized_end=6436,
+)
+
+_TESTMAP_MAPINT32INT32ENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPINT64INT64ENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPUINT32UINT32ENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPUINT64UINT64ENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPSINT32SINT32ENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPSINT64SINT64ENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPFIXED32FIXED32ENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPFIXED64FIXED64ENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPSFIXED32SFIXED32ENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPSFIXED64SFIXED64ENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPINT32FLOATENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPINT32DOUBLEENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPBOOLBOOLENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPSTRINGSTRINGENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPINT32BYTESENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPINT32ENUMENTRY.fields_by_name['value'].enum_type = _MAPENUM
+_TESTMAP_MAPINT32ENUMENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPINT32FOREIGNMESSAGEENTRY.fields_by_name['value'].message_type = google_dot_protobuf_dot_unittest__pb2._FOREIGNMESSAGE
+_TESTMAP_MAPINT32FOREIGNMESSAGEENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPSTRINGFOREIGNMESSAGEENTRY.fields_by_name['value'].message_type = google_dot_protobuf_dot_unittest__pb2._FOREIGNMESSAGE
+_TESTMAP_MAPSTRINGFOREIGNMESSAGEENTRY.containing_type = _TESTMAP
+_TESTMAP_MAPINT32ALLTYPESENTRY.fields_by_name['value'].message_type = google_dot_protobuf_dot_unittest__pb2._TESTALLTYPES
+_TESTMAP_MAPINT32ALLTYPESENTRY.containing_type = _TESTMAP
+_TESTMAP.fields_by_name['map_int32_int32'].message_type = _TESTMAP_MAPINT32INT32ENTRY
+_TESTMAP.fields_by_name['map_int64_int64'].message_type = _TESTMAP_MAPINT64INT64ENTRY
+_TESTMAP.fields_by_name['map_uint32_uint32'].message_type = _TESTMAP_MAPUINT32UINT32ENTRY
+_TESTMAP.fields_by_name['map_uint64_uint64'].message_type = _TESTMAP_MAPUINT64UINT64ENTRY
+_TESTMAP.fields_by_name['map_sint32_sint32'].message_type = _TESTMAP_MAPSINT32SINT32ENTRY
+_TESTMAP.fields_by_name['map_sint64_sint64'].message_type = _TESTMAP_MAPSINT64SINT64ENTRY
+_TESTMAP.fields_by_name['map_fixed32_fixed32'].message_type = _TESTMAP_MAPFIXED32FIXED32ENTRY
+_TESTMAP.fields_by_name['map_fixed64_fixed64'].message_type = _TESTMAP_MAPFIXED64FIXED64ENTRY
+_TESTMAP.fields_by_name['map_sfixed32_sfixed32'].message_type = _TESTMAP_MAPSFIXED32SFIXED32ENTRY
+_TESTMAP.fields_by_name['map_sfixed64_sfixed64'].message_type = _TESTMAP_MAPSFIXED64SFIXED64ENTRY
+_TESTMAP.fields_by_name['map_int32_float'].message_type = _TESTMAP_MAPINT32FLOATENTRY
+_TESTMAP.fields_by_name['map_int32_double'].message_type = _TESTMAP_MAPINT32DOUBLEENTRY
+_TESTMAP.fields_by_name['map_bool_bool'].message_type = _TESTMAP_MAPBOOLBOOLENTRY
+_TESTMAP.fields_by_name['map_string_string'].message_type = _TESTMAP_MAPSTRINGSTRINGENTRY
+_TESTMAP.fields_by_name['map_int32_bytes'].message_type = _TESTMAP_MAPINT32BYTESENTRY
+_TESTMAP.fields_by_name['map_int32_enum'].message_type = _TESTMAP_MAPINT32ENUMENTRY
+_TESTMAP.fields_by_name['map_int32_foreign_message'].message_type = _TESTMAP_MAPINT32FOREIGNMESSAGEENTRY
+_TESTMAP.fields_by_name['map_string_foreign_message'].message_type = _TESTMAP_MAPSTRINGFOREIGNMESSAGEENTRY
+_TESTMAP.fields_by_name['map_int32_all_types'].message_type = _TESTMAP_MAPINT32ALLTYPESENTRY
+_TESTMAPSUBMESSAGE.fields_by_name['test_map'].message_type = _TESTMAP
+_TESTMESSAGEMAP_MAPINT32MESSAGEENTRY.fields_by_name['value'].message_type = google_dot_protobuf_dot_unittest__pb2._TESTALLTYPES
+_TESTMESSAGEMAP_MAPINT32MESSAGEENTRY.containing_type = _TESTMESSAGEMAP
+_TESTMESSAGEMAP.fields_by_name['map_int32_message'].message_type = _TESTMESSAGEMAP_MAPINT32MESSAGEENTRY
+_TESTSAMETYPEMAP_MAP1ENTRY.containing_type = _TESTSAMETYPEMAP
+_TESTSAMETYPEMAP_MAP2ENTRY.containing_type = _TESTSAMETYPEMAP
+_TESTSAMETYPEMAP.fields_by_name['map1'].message_type = _TESTSAMETYPEMAP_MAP1ENTRY
+_TESTSAMETYPEMAP.fields_by_name['map2'].message_type = _TESTSAMETYPEMAP_MAP2ENTRY
+_TESTREQUIREDMESSAGEMAP_MAPFIELDENTRY.fields_by_name['value'].message_type = google_dot_protobuf_dot_unittest__pb2._TESTREQUIRED
+_TESTREQUIREDMESSAGEMAP_MAPFIELDENTRY.containing_type = _TESTREQUIREDMESSAGEMAP
+_TESTREQUIREDMESSAGEMAP.fields_by_name['map_field'].message_type = _TESTREQUIREDMESSAGEMAP_MAPFIELDENTRY
+_TESTARENAMAP_MAPINT32INT32ENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPINT64INT64ENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPUINT32UINT32ENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPUINT64UINT64ENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPSINT32SINT32ENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPSINT64SINT64ENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPFIXED32FIXED32ENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPFIXED64FIXED64ENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPSFIXED32SFIXED32ENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPSFIXED64SFIXED64ENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPINT32FLOATENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPINT32DOUBLEENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPBOOLBOOLENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPSTRINGSTRINGENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPINT32BYTESENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPINT32ENUMENTRY.fields_by_name['value'].enum_type = _MAPENUM
+_TESTARENAMAP_MAPINT32ENUMENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP_MAPINT32FOREIGNMESSAGEENTRY.fields_by_name['value'].message_type = google_dot_protobuf_dot_unittest__pb2._FOREIGNMESSAGE
+_TESTARENAMAP_MAPINT32FOREIGNMESSAGEENTRY.containing_type = _TESTARENAMAP
+_TESTARENAMAP.fields_by_name['map_int32_int32'].message_type = _TESTARENAMAP_MAPINT32INT32ENTRY
+_TESTARENAMAP.fields_by_name['map_int64_int64'].message_type = _TESTARENAMAP_MAPINT64INT64ENTRY
+_TESTARENAMAP.fields_by_name['map_uint32_uint32'].message_type = _TESTARENAMAP_MAPUINT32UINT32ENTRY
+_TESTARENAMAP.fields_by_name['map_uint64_uint64'].message_type = _TESTARENAMAP_MAPUINT64UINT64ENTRY
+_TESTARENAMAP.fields_by_name['map_sint32_sint32'].message_type = _TESTARENAMAP_MAPSINT32SINT32ENTRY
+_TESTARENAMAP.fields_by_name['map_sint64_sint64'].message_type = _TESTARENAMAP_MAPSINT64SINT64ENTRY
+_TESTARENAMAP.fields_by_name['map_fixed32_fixed32'].message_type = _TESTARENAMAP_MAPFIXED32FIXED32ENTRY
+_TESTARENAMAP.fields_by_name['map_fixed64_fixed64'].message_type = _TESTARENAMAP_MAPFIXED64FIXED64ENTRY
+_TESTARENAMAP.fields_by_name['map_sfixed32_sfixed32'].message_type = _TESTARENAMAP_MAPSFIXED32SFIXED32ENTRY
+_TESTARENAMAP.fields_by_name['map_sfixed64_sfixed64'].message_type = _TESTARENAMAP_MAPSFIXED64SFIXED64ENTRY
+_TESTARENAMAP.fields_by_name['map_int32_float'].message_type = _TESTARENAMAP_MAPINT32FLOATENTRY
+_TESTARENAMAP.fields_by_name['map_int32_double'].message_type = _TESTARENAMAP_MAPINT32DOUBLEENTRY
+_TESTARENAMAP.fields_by_name['map_bool_bool'].message_type = _TESTARENAMAP_MAPBOOLBOOLENTRY
+_TESTARENAMAP.fields_by_name['map_string_string'].message_type = _TESTARENAMAP_MAPSTRINGSTRINGENTRY
+_TESTARENAMAP.fields_by_name['map_int32_bytes'].message_type = _TESTARENAMAP_MAPINT32BYTESENTRY
+_TESTARENAMAP.fields_by_name['map_int32_enum'].message_type = _TESTARENAMAP_MAPINT32ENUMENTRY
+_TESTARENAMAP.fields_by_name['map_int32_foreign_message'].message_type = _TESTARENAMAP_MAPINT32FOREIGNMESSAGEENTRY
+_MESSAGECONTAININGENUMCALLEDTYPE_TYPEENTRY.fields_by_name['value'].message_type = _MESSAGECONTAININGENUMCALLEDTYPE
+_MESSAGECONTAININGENUMCALLEDTYPE_TYPEENTRY.containing_type = _MESSAGECONTAININGENUMCALLEDTYPE
+_MESSAGECONTAININGENUMCALLEDTYPE.fields_by_name['type'].message_type = _MESSAGECONTAININGENUMCALLEDTYPE_TYPEENTRY
+_MESSAGECONTAININGENUMCALLEDTYPE_TYPE.containing_type = _MESSAGECONTAININGENUMCALLEDTYPE
+_MESSAGECONTAININGMAPCALLEDENTRY_ENTRYENTRY.containing_type = _MESSAGECONTAININGMAPCALLEDENTRY
+_MESSAGECONTAININGMAPCALLEDENTRY.fields_by_name['entry'].message_type = _MESSAGECONTAININGMAPCALLEDENTRY_ENTRYENTRY
+_TESTRECURSIVEMAPMESSAGE_AENTRY.fields_by_name['value'].message_type = _TESTRECURSIVEMAPMESSAGE
+_TESTRECURSIVEMAPMESSAGE_AENTRY.containing_type = _TESTRECURSIVEMAPMESSAGE
+_TESTRECURSIVEMAPMESSAGE.fields_by_name['a'].message_type = _TESTRECURSIVEMAPMESSAGE_AENTRY
+DESCRIPTOR.message_types_by_name['TestMap'] = _TESTMAP
+DESCRIPTOR.message_types_by_name['TestMapSubmessage'] = _TESTMAPSUBMESSAGE
+DESCRIPTOR.message_types_by_name['TestMessageMap'] = _TESTMESSAGEMAP
+DESCRIPTOR.message_types_by_name['TestSameTypeMap'] = _TESTSAMETYPEMAP
+DESCRIPTOR.message_types_by_name['TestRequiredMessageMap'] = _TESTREQUIREDMESSAGEMAP
+DESCRIPTOR.message_types_by_name['TestArenaMap'] = _TESTARENAMAP
+DESCRIPTOR.message_types_by_name['MessageContainingEnumCalledType'] = _MESSAGECONTAININGENUMCALLEDTYPE
+DESCRIPTOR.message_types_by_name['MessageContainingMapCalledEntry'] = _MESSAGECONTAININGMAPCALLEDENTRY
+DESCRIPTOR.message_types_by_name['TestRecursiveMapMessage'] = _TESTRECURSIVEMAPMESSAGE
+DESCRIPTOR.enum_types_by_name['MapEnum'] = _MAPENUM
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestMap = _reflection.GeneratedProtocolMessageType('TestMap', (_message.Message,), {
+
+  'MapInt32Int32Entry' : _reflection.GeneratedProtocolMessageType('MapInt32Int32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPINT32INT32ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapInt32Int32Entry)
+    })
+  ,
+
+  'MapInt64Int64Entry' : _reflection.GeneratedProtocolMessageType('MapInt64Int64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPINT64INT64ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapInt64Int64Entry)
+    })
+  ,
+
+  'MapUint32Uint32Entry' : _reflection.GeneratedProtocolMessageType('MapUint32Uint32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPUINT32UINT32ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapUint32Uint32Entry)
+    })
+  ,
+
+  'MapUint64Uint64Entry' : _reflection.GeneratedProtocolMessageType('MapUint64Uint64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPUINT64UINT64ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapUint64Uint64Entry)
+    })
+  ,
+
+  'MapSint32Sint32Entry' : _reflection.GeneratedProtocolMessageType('MapSint32Sint32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPSINT32SINT32ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapSint32Sint32Entry)
+    })
+  ,
+
+  'MapSint64Sint64Entry' : _reflection.GeneratedProtocolMessageType('MapSint64Sint64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPSINT64SINT64ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapSint64Sint64Entry)
+    })
+  ,
+
+  'MapFixed32Fixed32Entry' : _reflection.GeneratedProtocolMessageType('MapFixed32Fixed32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPFIXED32FIXED32ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapFixed32Fixed32Entry)
+    })
+  ,
+
+  'MapFixed64Fixed64Entry' : _reflection.GeneratedProtocolMessageType('MapFixed64Fixed64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPFIXED64FIXED64ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapFixed64Fixed64Entry)
+    })
+  ,
+
+  'MapSfixed32Sfixed32Entry' : _reflection.GeneratedProtocolMessageType('MapSfixed32Sfixed32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPSFIXED32SFIXED32ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapSfixed32Sfixed32Entry)
+    })
+  ,
+
+  'MapSfixed64Sfixed64Entry' : _reflection.GeneratedProtocolMessageType('MapSfixed64Sfixed64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPSFIXED64SFIXED64ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapSfixed64Sfixed64Entry)
+    })
+  ,
+
+  'MapInt32FloatEntry' : _reflection.GeneratedProtocolMessageType('MapInt32FloatEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPINT32FLOATENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapInt32FloatEntry)
+    })
+  ,
+
+  'MapInt32DoubleEntry' : _reflection.GeneratedProtocolMessageType('MapInt32DoubleEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPINT32DOUBLEENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapInt32DoubleEntry)
+    })
+  ,
+
+  'MapBoolBoolEntry' : _reflection.GeneratedProtocolMessageType('MapBoolBoolEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPBOOLBOOLENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapBoolBoolEntry)
+    })
+  ,
+
+  'MapStringStringEntry' : _reflection.GeneratedProtocolMessageType('MapStringStringEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPSTRINGSTRINGENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapStringStringEntry)
+    })
+  ,
+
+  'MapInt32BytesEntry' : _reflection.GeneratedProtocolMessageType('MapInt32BytesEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPINT32BYTESENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapInt32BytesEntry)
+    })
+  ,
+
+  'MapInt32EnumEntry' : _reflection.GeneratedProtocolMessageType('MapInt32EnumEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPINT32ENUMENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapInt32EnumEntry)
+    })
+  ,
+
+  'MapInt32ForeignMessageEntry' : _reflection.GeneratedProtocolMessageType('MapInt32ForeignMessageEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPINT32FOREIGNMESSAGEENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapInt32ForeignMessageEntry)
+    })
+  ,
+
+  'MapStringForeignMessageEntry' : _reflection.GeneratedProtocolMessageType('MapStringForeignMessageEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPSTRINGFOREIGNMESSAGEENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapStringForeignMessageEntry)
+    })
+  ,
+
+  'MapInt32AllTypesEntry' : _reflection.GeneratedProtocolMessageType('MapInt32AllTypesEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_MAPINT32ALLTYPESENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap.MapInt32AllTypesEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTMAP,
+  '__module__' : 'google.protobuf.map_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMap)
+  })
+_sym_db.RegisterMessage(TestMap)
+_sym_db.RegisterMessage(TestMap.MapInt32Int32Entry)
+_sym_db.RegisterMessage(TestMap.MapInt64Int64Entry)
+_sym_db.RegisterMessage(TestMap.MapUint32Uint32Entry)
+_sym_db.RegisterMessage(TestMap.MapUint64Uint64Entry)
+_sym_db.RegisterMessage(TestMap.MapSint32Sint32Entry)
+_sym_db.RegisterMessage(TestMap.MapSint64Sint64Entry)
+_sym_db.RegisterMessage(TestMap.MapFixed32Fixed32Entry)
+_sym_db.RegisterMessage(TestMap.MapFixed64Fixed64Entry)
+_sym_db.RegisterMessage(TestMap.MapSfixed32Sfixed32Entry)
+_sym_db.RegisterMessage(TestMap.MapSfixed64Sfixed64Entry)
+_sym_db.RegisterMessage(TestMap.MapInt32FloatEntry)
+_sym_db.RegisterMessage(TestMap.MapInt32DoubleEntry)
+_sym_db.RegisterMessage(TestMap.MapBoolBoolEntry)
+_sym_db.RegisterMessage(TestMap.MapStringStringEntry)
+_sym_db.RegisterMessage(TestMap.MapInt32BytesEntry)
+_sym_db.RegisterMessage(TestMap.MapInt32EnumEntry)
+_sym_db.RegisterMessage(TestMap.MapInt32ForeignMessageEntry)
+_sym_db.RegisterMessage(TestMap.MapStringForeignMessageEntry)
+_sym_db.RegisterMessage(TestMap.MapInt32AllTypesEntry)
+
+TestMapSubmessage = _reflection.GeneratedProtocolMessageType('TestMapSubmessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMAPSUBMESSAGE,
+  '__module__' : 'google.protobuf.map_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMapSubmessage)
+  })
+_sym_db.RegisterMessage(TestMapSubmessage)
+
+TestMessageMap = _reflection.GeneratedProtocolMessageType('TestMessageMap', (_message.Message,), {
+
+  'MapInt32MessageEntry' : _reflection.GeneratedProtocolMessageType('MapInt32MessageEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMESSAGEMAP_MAPINT32MESSAGEENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMessageMap.MapInt32MessageEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTMESSAGEMAP,
+  '__module__' : 'google.protobuf.map_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMessageMap)
+  })
+_sym_db.RegisterMessage(TestMessageMap)
+_sym_db.RegisterMessage(TestMessageMap.MapInt32MessageEntry)
+
+TestSameTypeMap = _reflection.GeneratedProtocolMessageType('TestSameTypeMap', (_message.Message,), {
+
+  'Map1Entry' : _reflection.GeneratedProtocolMessageType('Map1Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTSAMETYPEMAP_MAP1ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestSameTypeMap.Map1Entry)
+    })
+  ,
+
+  'Map2Entry' : _reflection.GeneratedProtocolMessageType('Map2Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTSAMETYPEMAP_MAP2ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestSameTypeMap.Map2Entry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTSAMETYPEMAP,
+  '__module__' : 'google.protobuf.map_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestSameTypeMap)
+  })
+_sym_db.RegisterMessage(TestSameTypeMap)
+_sym_db.RegisterMessage(TestSameTypeMap.Map1Entry)
+_sym_db.RegisterMessage(TestSameTypeMap.Map2Entry)
+
+TestRequiredMessageMap = _reflection.GeneratedProtocolMessageType('TestRequiredMessageMap', (_message.Message,), {
+
+  'MapFieldEntry' : _reflection.GeneratedProtocolMessageType('MapFieldEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTREQUIREDMESSAGEMAP_MAPFIELDENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRequiredMessageMap.MapFieldEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTREQUIREDMESSAGEMAP,
+  '__module__' : 'google.protobuf.map_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRequiredMessageMap)
+  })
+_sym_db.RegisterMessage(TestRequiredMessageMap)
+_sym_db.RegisterMessage(TestRequiredMessageMap.MapFieldEntry)
+
+TestArenaMap = _reflection.GeneratedProtocolMessageType('TestArenaMap', (_message.Message,), {
+
+  'MapInt32Int32Entry' : _reflection.GeneratedProtocolMessageType('MapInt32Int32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPINT32INT32ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapInt32Int32Entry)
+    })
+  ,
+
+  'MapInt64Int64Entry' : _reflection.GeneratedProtocolMessageType('MapInt64Int64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPINT64INT64ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapInt64Int64Entry)
+    })
+  ,
+
+  'MapUint32Uint32Entry' : _reflection.GeneratedProtocolMessageType('MapUint32Uint32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPUINT32UINT32ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapUint32Uint32Entry)
+    })
+  ,
+
+  'MapUint64Uint64Entry' : _reflection.GeneratedProtocolMessageType('MapUint64Uint64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPUINT64UINT64ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapUint64Uint64Entry)
+    })
+  ,
+
+  'MapSint32Sint32Entry' : _reflection.GeneratedProtocolMessageType('MapSint32Sint32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPSINT32SINT32ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapSint32Sint32Entry)
+    })
+  ,
+
+  'MapSint64Sint64Entry' : _reflection.GeneratedProtocolMessageType('MapSint64Sint64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPSINT64SINT64ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapSint64Sint64Entry)
+    })
+  ,
+
+  'MapFixed32Fixed32Entry' : _reflection.GeneratedProtocolMessageType('MapFixed32Fixed32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPFIXED32FIXED32ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapFixed32Fixed32Entry)
+    })
+  ,
+
+  'MapFixed64Fixed64Entry' : _reflection.GeneratedProtocolMessageType('MapFixed64Fixed64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPFIXED64FIXED64ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapFixed64Fixed64Entry)
+    })
+  ,
+
+  'MapSfixed32Sfixed32Entry' : _reflection.GeneratedProtocolMessageType('MapSfixed32Sfixed32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPSFIXED32SFIXED32ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapSfixed32Sfixed32Entry)
+    })
+  ,
+
+  'MapSfixed64Sfixed64Entry' : _reflection.GeneratedProtocolMessageType('MapSfixed64Sfixed64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPSFIXED64SFIXED64ENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapSfixed64Sfixed64Entry)
+    })
+  ,
+
+  'MapInt32FloatEntry' : _reflection.GeneratedProtocolMessageType('MapInt32FloatEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPINT32FLOATENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapInt32FloatEntry)
+    })
+  ,
+
+  'MapInt32DoubleEntry' : _reflection.GeneratedProtocolMessageType('MapInt32DoubleEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPINT32DOUBLEENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapInt32DoubleEntry)
+    })
+  ,
+
+  'MapBoolBoolEntry' : _reflection.GeneratedProtocolMessageType('MapBoolBoolEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPBOOLBOOLENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapBoolBoolEntry)
+    })
+  ,
+
+  'MapStringStringEntry' : _reflection.GeneratedProtocolMessageType('MapStringStringEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPSTRINGSTRINGENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapStringStringEntry)
+    })
+  ,
+
+  'MapInt32BytesEntry' : _reflection.GeneratedProtocolMessageType('MapInt32BytesEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPINT32BYTESENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapInt32BytesEntry)
+    })
+  ,
+
+  'MapInt32EnumEntry' : _reflection.GeneratedProtocolMessageType('MapInt32EnumEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPINT32ENUMENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapInt32EnumEntry)
+    })
+  ,
+
+  'MapInt32ForeignMessageEntry' : _reflection.GeneratedProtocolMessageType('MapInt32ForeignMessageEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTARENAMAP_MAPINT32FOREIGNMESSAGEENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap.MapInt32ForeignMessageEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTARENAMAP,
+  '__module__' : 'google.protobuf.map_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestArenaMap)
+  })
+_sym_db.RegisterMessage(TestArenaMap)
+_sym_db.RegisterMessage(TestArenaMap.MapInt32Int32Entry)
+_sym_db.RegisterMessage(TestArenaMap.MapInt64Int64Entry)
+_sym_db.RegisterMessage(TestArenaMap.MapUint32Uint32Entry)
+_sym_db.RegisterMessage(TestArenaMap.MapUint64Uint64Entry)
+_sym_db.RegisterMessage(TestArenaMap.MapSint32Sint32Entry)
+_sym_db.RegisterMessage(TestArenaMap.MapSint64Sint64Entry)
+_sym_db.RegisterMessage(TestArenaMap.MapFixed32Fixed32Entry)
+_sym_db.RegisterMessage(TestArenaMap.MapFixed64Fixed64Entry)
+_sym_db.RegisterMessage(TestArenaMap.MapSfixed32Sfixed32Entry)
+_sym_db.RegisterMessage(TestArenaMap.MapSfixed64Sfixed64Entry)
+_sym_db.RegisterMessage(TestArenaMap.MapInt32FloatEntry)
+_sym_db.RegisterMessage(TestArenaMap.MapInt32DoubleEntry)
+_sym_db.RegisterMessage(TestArenaMap.MapBoolBoolEntry)
+_sym_db.RegisterMessage(TestArenaMap.MapStringStringEntry)
+_sym_db.RegisterMessage(TestArenaMap.MapInt32BytesEntry)
+_sym_db.RegisterMessage(TestArenaMap.MapInt32EnumEntry)
+_sym_db.RegisterMessage(TestArenaMap.MapInt32ForeignMessageEntry)
+
+MessageContainingEnumCalledType = _reflection.GeneratedProtocolMessageType('MessageContainingEnumCalledType', (_message.Message,), {
+
+  'TypeEntry' : _reflection.GeneratedProtocolMessageType('TypeEntry', (_message.Message,), {
+    'DESCRIPTOR' : _MESSAGECONTAININGENUMCALLEDTYPE_TYPEENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.MessageContainingEnumCalledType.TypeEntry)
+    })
+  ,
+  'DESCRIPTOR' : _MESSAGECONTAININGENUMCALLEDTYPE,
+  '__module__' : 'google.protobuf.map_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.MessageContainingEnumCalledType)
+  })
+_sym_db.RegisterMessage(MessageContainingEnumCalledType)
+_sym_db.RegisterMessage(MessageContainingEnumCalledType.TypeEntry)
+
+MessageContainingMapCalledEntry = _reflection.GeneratedProtocolMessageType('MessageContainingMapCalledEntry', (_message.Message,), {
+
+  'EntryEntry' : _reflection.GeneratedProtocolMessageType('EntryEntry', (_message.Message,), {
+    'DESCRIPTOR' : _MESSAGECONTAININGMAPCALLEDENTRY_ENTRYENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.MessageContainingMapCalledEntry.EntryEntry)
+    })
+  ,
+  'DESCRIPTOR' : _MESSAGECONTAININGMAPCALLEDENTRY,
+  '__module__' : 'google.protobuf.map_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.MessageContainingMapCalledEntry)
+  })
+_sym_db.RegisterMessage(MessageContainingMapCalledEntry)
+_sym_db.RegisterMessage(MessageContainingMapCalledEntry.EntryEntry)
+
+TestRecursiveMapMessage = _reflection.GeneratedProtocolMessageType('TestRecursiveMapMessage', (_message.Message,), {
+
+  'AEntry' : _reflection.GeneratedProtocolMessageType('AEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTRECURSIVEMAPMESSAGE_AENTRY,
+    '__module__' : 'google.protobuf.map_unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRecursiveMapMessage.AEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTRECURSIVEMAPMESSAGE,
+  '__module__' : 'google.protobuf.map_unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRecursiveMapMessage)
+  })
+_sym_db.RegisterMessage(TestRecursiveMapMessage)
+_sym_db.RegisterMessage(TestRecursiveMapMessage.AEntry)
+
+
+DESCRIPTOR._options = None
+_TESTMAP_MAPINT32INT32ENTRY._options = None
+_TESTMAP_MAPINT64INT64ENTRY._options = None
+_TESTMAP_MAPUINT32UINT32ENTRY._options = None
+_TESTMAP_MAPUINT64UINT64ENTRY._options = None
+_TESTMAP_MAPSINT32SINT32ENTRY._options = None
+_TESTMAP_MAPSINT64SINT64ENTRY._options = None
+_TESTMAP_MAPFIXED32FIXED32ENTRY._options = None
+_TESTMAP_MAPFIXED64FIXED64ENTRY._options = None
+_TESTMAP_MAPSFIXED32SFIXED32ENTRY._options = None
+_TESTMAP_MAPSFIXED64SFIXED64ENTRY._options = None
+_TESTMAP_MAPINT32FLOATENTRY._options = None
+_TESTMAP_MAPINT32DOUBLEENTRY._options = None
+_TESTMAP_MAPBOOLBOOLENTRY._options = None
+_TESTMAP_MAPSTRINGSTRINGENTRY._options = None
+_TESTMAP_MAPINT32BYTESENTRY._options = None
+_TESTMAP_MAPINT32ENUMENTRY._options = None
+_TESTMAP_MAPINT32FOREIGNMESSAGEENTRY._options = None
+_TESTMAP_MAPSTRINGFOREIGNMESSAGEENTRY._options = None
+_TESTMAP_MAPINT32ALLTYPESENTRY._options = None
+_TESTMESSAGEMAP_MAPINT32MESSAGEENTRY._options = None
+_TESTSAMETYPEMAP_MAP1ENTRY._options = None
+_TESTSAMETYPEMAP_MAP2ENTRY._options = None
+_TESTREQUIREDMESSAGEMAP_MAPFIELDENTRY._options = None
+_TESTARENAMAP_MAPINT32INT32ENTRY._options = None
+_TESTARENAMAP_MAPINT64INT64ENTRY._options = None
+_TESTARENAMAP_MAPUINT32UINT32ENTRY._options = None
+_TESTARENAMAP_MAPUINT64UINT64ENTRY._options = None
+_TESTARENAMAP_MAPSINT32SINT32ENTRY._options = None
+_TESTARENAMAP_MAPSINT64SINT64ENTRY._options = None
+_TESTARENAMAP_MAPFIXED32FIXED32ENTRY._options = None
+_TESTARENAMAP_MAPFIXED64FIXED64ENTRY._options = None
+_TESTARENAMAP_MAPSFIXED32SFIXED32ENTRY._options = None
+_TESTARENAMAP_MAPSFIXED64SFIXED64ENTRY._options = None
+_TESTARENAMAP_MAPINT32FLOATENTRY._options = None
+_TESTARENAMAP_MAPINT32DOUBLEENTRY._options = None
+_TESTARENAMAP_MAPBOOLBOOLENTRY._options = None
+_TESTARENAMAP_MAPSTRINGSTRINGENTRY._options = None
+_TESTARENAMAP_MAPINT32BYTESENTRY._options = None
+_TESTARENAMAP_MAPINT32ENUMENTRY._options = None
+_TESTARENAMAP_MAPINT32FOREIGNMESSAGEENTRY._options = None
+_MESSAGECONTAININGENUMCALLEDTYPE_TYPEENTRY._options = None
+_MESSAGECONTAININGMAPCALLEDENTRY_ENTRYENTRY._options = None
+_TESTRECURSIVEMAPMESSAGE_AENTRY._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/message.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/message.py
new file mode 100644
index 0000000..224d2fc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/message.py
@@ -0,0 +1,413 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# TODO(robinson): We should just make these methods all "pure-virtual" and move
+# all implementation out, into reflection.py for now.
+
+
+"""Contains an abstract base class for protocol messages."""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+class Error(Exception):
+  """Base error type for this module."""
+  pass
+
+
+class DecodeError(Error):
+  """Exception raised when deserializing messages."""
+  pass
+
+
+class EncodeError(Error):
+  """Exception raised when serializing messages."""
+  pass
+
+
+class Message(object):
+
+  """Abstract base class for protocol messages.
+
+  Protocol message classes are almost always generated by the protocol
+  compiler.  These generated types subclass Message and implement the methods
+  shown below.
+  """
+
+  # TODO(robinson): Link to an HTML document here.
+
+  # TODO(robinson): Document that instances of this class will also
+  # have an Extensions attribute with __getitem__ and __setitem__.
+  # Again, not sure how to best convey this.
+
+  # TODO(robinson): Document that the class must also have a static
+  #   RegisterExtension(extension_field) method.
+  #   Not sure how to best express at this point.
+
+  # TODO(robinson): Document these fields and methods.
+
+  __slots__ = []
+
+  #: The :class:`google.protobuf.descriptor.Descriptor` for this message type.
+  DESCRIPTOR = None
+
+  def __deepcopy__(self, memo=None):
+    clone = type(self)()
+    clone.MergeFrom(self)
+    return clone
+
+  def __eq__(self, other_msg):
+    """Recursively compares two messages by value and structure."""
+    raise NotImplementedError
+
+  def __ne__(self, other_msg):
+    # Can't just say self != other_msg, since that would infinitely recurse. :)
+    return not self == other_msg
+
+  def __hash__(self):
+    raise TypeError('unhashable object')
+
+  def __str__(self):
+    """Outputs a human-readable representation of the message."""
+    raise NotImplementedError
+
+  def __unicode__(self):
+    """Outputs a human-readable representation of the message."""
+    raise NotImplementedError
+
+  def MergeFrom(self, other_msg):
+    """Merges the contents of the specified message into current message.
+
+    This method merges the contents of the specified message into the current
+    message. Singular fields that are set in the specified message overwrite
+    the corresponding fields in the current message. Repeated fields are
+    appended. Singular sub-messages and groups are recursively merged.
+
+    Args:
+      other_msg (Message): A message to merge into the current message.
+    """
+    raise NotImplementedError
+
+  def CopyFrom(self, other_msg):
+    """Copies the content of the specified message into the current message.
+
+    The method clears the current message and then merges the specified
+    message using MergeFrom.
+
+    Args:
+      other_msg (Message): A message to copy into the current one.
+    """
+    if self is other_msg:
+      return
+    self.Clear()
+    self.MergeFrom(other_msg)
+
+  def Clear(self):
+    """Clears all data that was set in the message."""
+    raise NotImplementedError
+
+  def SetInParent(self):
+    """Mark this as present in the parent.
+
+    This normally happens automatically when you assign a field of a
+    sub-message, but sometimes you want to make the sub-message
+    present while keeping it empty.  If you find yourself using this,
+    you may want to reconsider your design.
+    """
+    raise NotImplementedError
+
+  def IsInitialized(self):
+    """Checks if the message is initialized.
+
+    Returns:
+      bool: The method returns True if the message is initialized (i.e. all of
+      its required fields are set).
+    """
+    raise NotImplementedError
+
+  # TODO(robinson): MergeFromString() should probably return None and be
+  # implemented in terms of a helper that returns the # of bytes read.  Our
+  # deserialization routines would use the helper when recursively
+  # deserializing, but the end user would almost always just want the no-return
+  # MergeFromString().
+
+  def MergeFromString(self, serialized):
+    """Merges serialized protocol buffer data into this message.
+
+    When we find a field in `serialized` that is already present
+    in this message:
+
+    -   If it's a "repeated" field, we append to the end of our list.
+    -   Else, if it's a scalar, we overwrite our field.
+    -   Else, (it's a nonrepeated composite), we recursively merge
+        into the existing composite.
+
+    Args:
+      serialized (bytes): Any object that allows us to call
+        ``memoryview(serialized)`` to access a string of bytes using the
+        buffer interface.
+
+    Returns:
+      int: The number of bytes read from `serialized`.
+      For non-group messages, this will always be `len(serialized)`,
+      but for messages which are actually groups, this will
+      generally be less than `len(serialized)`, since we must
+      stop when we reach an ``END_GROUP`` tag.  Note that if
+      we *do* stop because of an ``END_GROUP`` tag, the number
+      of bytes returned does not include the bytes
+      for the ``END_GROUP`` tag information.
+
+    Raises:
+      DecodeError: if the input cannot be parsed.
+    """
+    # TODO(robinson): Document handling of unknown fields.
+    # TODO(robinson): When we switch to a helper, this will return None.
+    raise NotImplementedError
+
+  def ParseFromString(self, serialized):
+    """Parse serialized protocol buffer data into this message.
+
+    Like :func:`MergeFromString()`, except we clear the object first.
+    """
+    self.Clear()
+    return self.MergeFromString(serialized)
+
+  def SerializeToString(self, **kwargs):
+    """Serializes the protocol message to a binary string.
+
+    Keyword Args:
+      deterministic (bool): If true, requests deterministic serialization
+        of the protobuf, with predictable ordering of map keys.
+
+    Returns:
+      A binary string representation of the message if all of the required
+      fields in the message are set (i.e. the message is initialized).
+
+    Raises:
+      EncodeError: if the message isn't initialized (see :func:`IsInitialized`).
+    """
+    raise NotImplementedError
+
+  def SerializePartialToString(self, **kwargs):
+    """Serializes the protocol message to a binary string.
+
+    This method is similar to SerializeToString but doesn't check if the
+    message is initialized.
+
+    Keyword Args:
+      deterministic (bool): If true, requests deterministic serialization
+        of the protobuf, with predictable ordering of map keys.
+
+    Returns:
+      bytes: A serialized representation of the partial message.
+    """
+    raise NotImplementedError
+
+  # TODO(robinson): Decide whether we like these better
+  # than auto-generated has_foo() and clear_foo() methods
+  # on the instances themselves.  This way is less consistent
+  # with C++, but it makes reflection-type access easier and
+  # reduces the number of magically autogenerated things.
+  #
+  # TODO(robinson): Be sure to document (and test) exactly
+  # which field names are accepted here.  Are we case-sensitive?
+  # What do we do with fields that share names with Python keywords
+  # like 'lambda' and 'yield'?
+  #
+  # nnorwitz says:
+  # """
+  # Typically (in python), an underscore is appended to names that are
+  # keywords. So they would become lambda_ or yield_.
+  # """
+  def ListFields(self):
+    """Returns a list of (FieldDescriptor, value) tuples for present fields.
+
+    A message field is non-empty if HasField() would return true. A singular
+    primitive field is non-empty if HasField() would return true in proto2 or it
+    is non zero in proto3. A repeated field is non-empty if it contains at least
+    one element. The fields are ordered by field number.
+
+    Returns:
+      list[tuple(FieldDescriptor, value)]: field descriptors and values
+      for all fields in the message which are not empty. The values vary by
+      field type.
+    """
+    raise NotImplementedError
+
+  def HasField(self, field_name):
+    """Checks if a certain field is set for the message.
+
+    For a oneof group, checks if any field inside is set. Note that if the
+    field_name is not defined in the message descriptor, :exc:`ValueError` will
+    be raised.
+
+    Args:
+      field_name (str): The name of the field to check for presence.
+
+    Returns:
+      bool: Whether a value has been set for the named field.
+
+    Raises:
+      ValueError: if the `field_name` is not a member of this message.
+    """
+    raise NotImplementedError
+
+  def ClearField(self, field_name):
+    """Clears the contents of a given field.
+
+    Inside a oneof group, clears the field set. If the name neither refers to a
+    defined field or oneof group, :exc:`ValueError` is raised.
+
+    Args:
+      field_name (str): The name of the field to check for presence.
+
+    Raises:
+      ValueError: if the `field_name` is not a member of this message.
+    """
+    raise NotImplementedError
+
+  def WhichOneof(self, oneof_group):
+    """Returns the name of the field that is set inside a oneof group.
+
+    If no field is set, returns None.
+
+    Args:
+      oneof_group (str): the name of the oneof group to check.
+
+    Returns:
+      str or None: The name of the group that is set, or None.
+
+    Raises:
+      ValueError: no group with the given name exists
+    """
+    raise NotImplementedError
+
+  def HasExtension(self, extension_handle):
+    """Checks if a certain extension is present for this message.
+
+    Extensions are retrieved using the :attr:`Extensions` mapping (if present).
+
+    Args:
+      extension_handle: The handle for the extension to check.
+
+    Returns:
+      bool: Whether the extension is present for this message.
+
+    Raises:
+      KeyError: if the extension is repeated. Similar to repeated fields,
+        there is no separate notion of presence: a "not present" repeated
+        extension is an empty list.
+    """
+    raise NotImplementedError
+
+  def ClearExtension(self, extension_handle):
+    """Clears the contents of a given extension.
+
+    Args:
+      extension_handle: The handle for the extension to clear.
+    """
+    raise NotImplementedError
+
+  def UnknownFields(self):
+    """Returns the UnknownFieldSet.
+
+    Returns:
+      UnknownFieldSet: The unknown fields stored in this message.
+    """
+    raise NotImplementedError
+
+  def DiscardUnknownFields(self):
+    """Clears all fields in the :class:`UnknownFieldSet`.
+
+    This operation is recursive for nested message.
+    """
+    raise NotImplementedError
+
+  def ByteSize(self):
+    """Returns the serialized size of this message.
+
+    Recursively calls ByteSize() on all contained messages.
+
+    Returns:
+      int: The number of bytes required to serialize this message.
+    """
+    raise NotImplementedError
+
+  def _SetListener(self, message_listener):
+    """Internal method used by the protocol message implementation.
+    Clients should not call this directly.
+
+    Sets a listener that this message will call on certain state transitions.
+
+    The purpose of this method is to register back-edges from children to
+    parents at runtime, for the purpose of setting "has" bits and
+    byte-size-dirty bits in the parent and ancestor objects whenever a child or
+    descendant object is modified.
+
+    If the client wants to disconnect this Message from the object tree, she
+    explicitly sets callback to None.
+
+    If message_listener is None, unregisters any existing listener.  Otherwise,
+    message_listener must implement the MessageListener interface in
+    internal/message_listener.py, and we discard any listener registered
+    via a previous _SetListener() call.
+    """
+    raise NotImplementedError
+
+  def __getstate__(self):
+    """Support the pickle protocol."""
+    return dict(serialized=self.SerializePartialToString())
+
+  def __setstate__(self, state):
+    """Support the pickle protocol."""
+    self.__init__()
+    serialized = state['serialized']
+    # On Python 3, using encoding='latin1' is required for unpickling
+    # protos pickled by Python 2.
+    if not isinstance(serialized, bytes):
+      serialized = serialized.encode('latin1')
+    self.ParseFromString(serialized)
+
+  def __reduce__(self):
+    message_descriptor = self.DESCRIPTOR
+    if message_descriptor.containing_type is None:
+      return type(self), (), self.__getstate__()
+    # the message type must be nested.
+    # Python does not pickle nested classes; use the symbol_database on the
+    # receiving end.
+    container = message_descriptor
+    return (_InternalConstructMessage, (container.full_name,),
+            self.__getstate__())
+
+
+def _InternalConstructMessage(full_name):
+  """Constructs a nested message."""
+  from google.protobuf import symbol_database  # pylint:disable=g-import-not-at-top
+
+  return symbol_database.Default().GetSymbol(full_name)()
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/message_factory.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/message_factory.py
new file mode 100644
index 0000000..24a524a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/message_factory.py
@@ -0,0 +1,162 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Provides a factory class for generating dynamic messages.
+
+The easiest way to use this class is if you have access to the FileDescriptor
+protos containing the messages you want to create you can just do the following:
+
+message_classes = message_factory.GetMessages(iterable_of_file_descriptors)
+my_proto_instance = message_classes['some.proto.package.MessageName']()
+"""
+
+__author__ = 'matthewtoia@google.com (Matt Toia)'
+
+from google.protobuf.internal import api_implementation
+from google.protobuf import descriptor_pool
+from google.protobuf import message
+
+if api_implementation.Type() == 'cpp':
+  from google.protobuf.pyext import cpp_message as message_impl
+else:
+  from google.protobuf.internal import python_message as message_impl
+
+
+# The type of all Message classes.
+_GENERATED_PROTOCOL_MESSAGE_TYPE = message_impl.GeneratedProtocolMessageType
+
+
+class MessageFactory(object):
+  """Factory for creating Proto2 messages from descriptors in a pool."""
+
+  def __init__(self, pool=None):
+    """Initializes a new factory."""
+    self.pool = pool or descriptor_pool.DescriptorPool()
+
+    # local cache of all classes built from protobuf descriptors
+    self._classes = {}
+
+  def GetPrototype(self, descriptor):
+    """Builds a proto2 message class based on the passed in descriptor.
+
+    Passing a descriptor with a fully qualified name matching a previous
+    invocation will cause the same class to be returned.
+
+    Args:
+      descriptor: The descriptor to build from.
+
+    Returns:
+      A class describing the passed in descriptor.
+    """
+    if descriptor not in self._classes:
+      descriptor_name = descriptor.name
+      if str is bytes:  # PY2
+        descriptor_name = descriptor.name.encode('ascii', 'ignore')
+      result_class = _GENERATED_PROTOCOL_MESSAGE_TYPE(
+          descriptor_name,
+          (message.Message,),
+          {'DESCRIPTOR': descriptor, '__module__': None})
+      # pylint: disable=protected-access
+      result_class._FACTORY = self
+      # If module not set, it wrongly points to message_factory module.
+      self._classes[descriptor] = result_class
+      for field in descriptor.fields:
+        if field.message_type:
+          self.GetPrototype(field.message_type)
+      for extension in result_class.DESCRIPTOR.extensions:
+        if extension.containing_type not in self._classes:
+          self.GetPrototype(extension.containing_type)
+        extended_class = self._classes[extension.containing_type]
+        extended_class.RegisterExtension(extension)
+    return self._classes[descriptor]
+
+  def GetMessages(self, files):
+    """Gets all the messages from a specified file.
+
+    This will find and resolve dependencies, failing if the descriptor
+    pool cannot satisfy them.
+
+    Args:
+      files: The file names to extract messages from.
+
+    Returns:
+      A dictionary mapping proto names to the message classes. This will include
+      any dependent messages as well as any messages defined in the same file as
+      a specified message.
+    """
+    result = {}
+    for file_name in files:
+      file_desc = self.pool.FindFileByName(file_name)
+      for desc in file_desc.message_types_by_name.values():
+        result[desc.full_name] = self.GetPrototype(desc)
+
+      # While the extension FieldDescriptors are created by the descriptor pool,
+      # the python classes created in the factory need them to be registered
+      # explicitly, which is done below.
+      #
+      # The call to RegisterExtension will specifically check if the
+      # extension was already registered on the object and either
+      # ignore the registration if the original was the same, or raise
+      # an error if they were different.
+
+      for extension in file_desc.extensions_by_name.values():
+        if extension.containing_type not in self._classes:
+          self.GetPrototype(extension.containing_type)
+        extended_class = self._classes[extension.containing_type]
+        extended_class.RegisterExtension(extension)
+    return result
+
+
+_FACTORY = MessageFactory()
+
+
+def GetMessages(file_protos):
+  """Builds a dictionary of all the messages available in a set of files.
+
+  Args:
+    file_protos: Iterable of FileDescriptorProto to build messages out of.
+
+  Returns:
+    A dictionary mapping proto names to the message classes. This will include
+    any dependent messages as well as any messages defined in the same file as
+    a specified message.
+  """
+  # The cpp implementation of the protocol buffer library requires to add the
+  # message in topological order of the dependency graph.
+  file_by_name = {file_proto.name: file_proto for file_proto in file_protos}
+  def _AddFile(file_proto):
+    for dependency in file_proto.dependency:
+      if dependency in file_by_name:
+        # Remove from elements to be visited, in order to cut cycles.
+        _AddFile(file_by_name.pop(dependency))
+    _FACTORY.pool.Add(file_proto)
+  while file_by_name:
+    _AddFile(file_by_name.popitem()[1])
+  return _FACTORY.GetMessages([file_proto.name for file_proto in file_protos])
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/proto_builder.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/proto_builder.py
new file mode 100644
index 0000000..736caed
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/proto_builder.py
@@ -0,0 +1,130 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Dynamic Protobuf class creator."""
+
+try:
+    from collections import OrderedDict
+except ImportError:
+    from ordereddict import OrderedDict  #PY26
+import hashlib
+import os
+
+from google.protobuf import descriptor_pb2
+from google.protobuf import message_factory
+
+
+def _GetMessageFromFactory(factory, full_name):
+  """Get a proto class from the MessageFactory by name.
+
+  Args:
+    factory: a MessageFactory instance.
+    full_name: str, the fully qualified name of the proto type.
+  Returns:
+    A class, for the type identified by full_name.
+  Raises:
+    KeyError, if the proto is not found in the factory's descriptor pool.
+  """
+  proto_descriptor = factory.pool.FindMessageTypeByName(full_name)
+  proto_cls = factory.GetPrototype(proto_descriptor)
+  return proto_cls
+
+
+def MakeSimpleProtoClass(fields, full_name=None, pool=None):
+  """Create a Protobuf class whose fields are basic types.
+
+  Note: this doesn't validate field names!
+
+  Args:
+    fields: dict of {name: field_type} mappings for each field in the proto. If
+        this is an OrderedDict the order will be maintained, otherwise the
+        fields will be sorted by name.
+    full_name: optional str, the fully-qualified name of the proto type.
+    pool: optional DescriptorPool instance.
+  Returns:
+    a class, the new protobuf class with a FileDescriptor.
+  """
+  factory = message_factory.MessageFactory(pool=pool)
+
+  if full_name is not None:
+    try:
+      proto_cls = _GetMessageFromFactory(factory, full_name)
+      return proto_cls
+    except KeyError:
+      # The factory's DescriptorPool doesn't know about this class yet.
+      pass
+
+  # Get a list of (name, field_type) tuples from the fields dict. If fields was
+  # an OrderedDict we keep the order, but otherwise we sort the field to ensure
+  # consistent ordering.
+  field_items = fields.items()
+  if not isinstance(fields, OrderedDict):
+    field_items = sorted(field_items)
+
+  # Use a consistent file name that is unlikely to conflict with any imported
+  # proto files.
+  fields_hash = hashlib.sha1()
+  for f_name, f_type in field_items:
+    fields_hash.update(f_name.encode('utf-8'))
+    fields_hash.update(str(f_type).encode('utf-8'))
+  proto_file_name = fields_hash.hexdigest() + '.proto'
+
+  # If the proto is anonymous, use the same hash to name it.
+  if full_name is None:
+    full_name = ('net.proto2.python.public.proto_builder.AnonymousProto_' +
+                 fields_hash.hexdigest())
+    try:
+      proto_cls = _GetMessageFromFactory(factory, full_name)
+      return proto_cls
+    except KeyError:
+      # The factory's DescriptorPool doesn't know about this class yet.
+      pass
+
+  # This is the first time we see this proto: add a new descriptor to the pool.
+  factory.pool.Add(
+      _MakeFileDescriptorProto(proto_file_name, full_name, field_items))
+  return _GetMessageFromFactory(factory, full_name)
+
+
+def _MakeFileDescriptorProto(proto_file_name, full_name, field_items):
+  """Populate FileDescriptorProto for MessageFactory's DescriptorPool."""
+  package, name = full_name.rsplit('.', 1)
+  file_proto = descriptor_pb2.FileDescriptorProto()
+  file_proto.name = os.path.join(package.replace('.', '/'), proto_file_name)
+  file_proto.package = package
+  desc_proto = file_proto.message_type.add()
+  desc_proto.name = name
+  for f_number, (f_name, f_type) in enumerate(field_items, 1):
+    field_proto = desc_proto.field.add()
+    field_proto.name = f_name
+    field_proto.number = f_number
+    field_proto.label = descriptor_pb2.FieldDescriptorProto.LABEL_OPTIONAL
+    field_proto.type = f_type
+  return file_proto
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__init__.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__init__.py
new file mode 100644
index 0000000..5585614
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__init__.py
@@ -0,0 +1,4 @@
+try:
+  __import__('pkg_resources').declare_namespace(__name__)
+except ImportError:
+  __path__ = __import__('pkgutil').extend_path(__path__, __name__)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..1d92871
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__pycache__/__init__.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__pycache__/cpp_message.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__pycache__/cpp_message.cpython-38.pyc
new file mode 100644
index 0000000..9738de2
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__pycache__/cpp_message.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__pycache__/python_pb2.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/__pycache__/python_pb2.cpython-38.pyc
new file mode 100644
index 0000000..d29c121
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diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/_message.cpython-38-x86_64-linux-gnu.so b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/_message.cpython-38-x86_64-linux-gnu.so
new file mode 100755
index 0000000..568b498
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/_message.cpython-38-x86_64-linux-gnu.so differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/cpp_message.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/cpp_message.py
new file mode 100644
index 0000000..fc8eb32
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/cpp_message.py
@@ -0,0 +1,65 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Protocol message implementation hooks for C++ implementation.
+
+Contains helper functions used to create protocol message classes from
+Descriptor objects at runtime backed by the protocol buffer C++ API.
+"""
+
+__author__ = 'tibell@google.com (Johan Tibell)'
+
+from google.protobuf.pyext import _message
+
+
+class GeneratedProtocolMessageType(_message.MessageMeta):
+
+  """Metaclass for protocol message classes created at runtime from Descriptors.
+
+  The protocol compiler currently uses this metaclass to create protocol
+  message classes at runtime.  Clients can also manually create their own
+  classes at runtime, as in this example:
+
+  mydescriptor = Descriptor(.....)
+  factory = symbol_database.Default()
+  factory.pool.AddDescriptor(mydescriptor)
+  MyProtoClass = factory.GetPrototype(mydescriptor)
+  myproto_instance = MyProtoClass()
+  myproto.foo_field = 23
+  ...
+
+  The above example will not work for nested types. If you wish to include them,
+  use reflection.MakeClass() instead of manually instantiating the class in
+  order to create the appropriate class structure.
+  """
+
+  # Must be consistent with the protocol-compiler code in
+  # proto2/compiler/internal/generator.*.
+  _DESCRIPTOR_KEY = 'DESCRIPTOR'
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/python_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/python_pb2.py
new file mode 100644
index 0000000..b992aa7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/pyext/python_pb2.py
@@ -0,0 +1,237 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/pyext/python.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/pyext/python.proto',
+  package='google.protobuf.python.internal',
+  syntax='proto2',
+  serialized_options=b'H\001',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\"google/protobuf/pyext/python.proto\x12\x1fgoogle.protobuf.python.internal\"\xbc\x02\n\x0cTestAllTypes\x12\\\n\x17repeated_nested_message\x18\x01 \x03(\x0b\x32;.google.protobuf.python.internal.TestAllTypes.NestedMessage\x12\\\n\x17optional_nested_message\x18\x02 \x01(\x0b\x32;.google.protobuf.python.internal.TestAllTypes.NestedMessage\x12\x16\n\x0eoptional_int32\x18\x03 \x01(\x05\x1aX\n\rNestedMessage\x12\n\n\x02\x62\x62\x18\x01 \x01(\x05\x12;\n\x02\x63\x63\x18\x02 \x01(\x0b\x32/.google.protobuf.python.internal.ForeignMessage\"&\n\x0e\x46oreignMessage\x12\t\n\x01\x63\x18\x01 \x01(\x05\x12\t\n\x01\x64\x18\x02 \x03(\x05\"\x1d\n\x11TestAllExtensions*\x08\x08\x01\x10\x80\x80\x80\x80\x02:\x9a\x01\n!optional_nested_message_extension\x12\x32.google.protobuf.python.internal.TestAllExtensions\x18\x01 \x01(\x0b\x32;.google.protobuf.python.internal.TestAllTypes.NestedMessage:\x9a\x01\n!repeated_nested_message_extension\x12\x32.google.protobuf.python.internal.TestAllExtensions\x18\x02 \x03(\x0b\x32;.google.protobuf.python.internal.TestAllTypes.NestedMessageB\x02H\x01'
+)
+
+
+OPTIONAL_NESTED_MESSAGE_EXTENSION_FIELD_NUMBER = 1
+optional_nested_message_extension = _descriptor.FieldDescriptor(
+  name='optional_nested_message_extension', full_name='google.protobuf.python.internal.optional_nested_message_extension', index=0,
+  number=1, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_NESTED_MESSAGE_EXTENSION_FIELD_NUMBER = 2
+repeated_nested_message_extension = _descriptor.FieldDescriptor(
+  name='repeated_nested_message_extension', full_name='google.protobuf.python.internal.repeated_nested_message_extension', index=1,
+  number=2, type=11, cpp_type=10, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+
+_TESTALLTYPES_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='google.protobuf.python.internal.TestAllTypes.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bb', full_name='google.protobuf.python.internal.TestAllTypes.NestedMessage.bb', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='cc', full_name='google.protobuf.python.internal.TestAllTypes.NestedMessage.cc', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=300,
+  serialized_end=388,
+)
+
+_TESTALLTYPES = _descriptor.Descriptor(
+  name='TestAllTypes',
+  full_name='google.protobuf.python.internal.TestAllTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_message', full_name='google.protobuf.python.internal.TestAllTypes.repeated_nested_message', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_message', full_name='google.protobuf.python.internal.TestAllTypes.optional_nested_message', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='google.protobuf.python.internal.TestAllTypes.optional_int32', index=2,
+      number=3, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTALLTYPES_NESTEDMESSAGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=72,
+  serialized_end=388,
+)
+
+
+_FOREIGNMESSAGE = _descriptor.Descriptor(
+  name='ForeignMessage',
+  full_name='google.protobuf.python.internal.ForeignMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='c', full_name='google.protobuf.python.internal.ForeignMessage.c', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='d', full_name='google.protobuf.python.internal.ForeignMessage.d', index=1,
+      number=2, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=390,
+  serialized_end=428,
+)
+
+
+_TESTALLEXTENSIONS = _descriptor.Descriptor(
+  name='TestAllExtensions',
+  full_name='google.protobuf.python.internal.TestAllExtensions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=430,
+  serialized_end=459,
+)
+
+_TESTALLTYPES_NESTEDMESSAGE.fields_by_name['cc'].message_type = _FOREIGNMESSAGE
+_TESTALLTYPES_NESTEDMESSAGE.containing_type = _TESTALLTYPES
+_TESTALLTYPES.fields_by_name['repeated_nested_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES.fields_by_name['optional_nested_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+DESCRIPTOR.message_types_by_name['TestAllTypes'] = _TESTALLTYPES
+DESCRIPTOR.message_types_by_name['ForeignMessage'] = _FOREIGNMESSAGE
+DESCRIPTOR.message_types_by_name['TestAllExtensions'] = _TESTALLEXTENSIONS
+DESCRIPTOR.extensions_by_name['optional_nested_message_extension'] = optional_nested_message_extension
+DESCRIPTOR.extensions_by_name['repeated_nested_message_extension'] = repeated_nested_message_extension
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestAllTypes = _reflection.GeneratedProtocolMessageType('TestAllTypes', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPES_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.pyext.python_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.TestAllTypes.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _TESTALLTYPES,
+  '__module__' : 'google.protobuf.pyext.python_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.TestAllTypes)
+  })
+_sym_db.RegisterMessage(TestAllTypes)
+_sym_db.RegisterMessage(TestAllTypes.NestedMessage)
+
+ForeignMessage = _reflection.GeneratedProtocolMessageType('ForeignMessage', (_message.Message,), {
+  'DESCRIPTOR' : _FOREIGNMESSAGE,
+  '__module__' : 'google.protobuf.pyext.python_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.ForeignMessage)
+  })
+_sym_db.RegisterMessage(ForeignMessage)
+
+TestAllExtensions = _reflection.GeneratedProtocolMessageType('TestAllExtensions', (_message.Message,), {
+  'DESCRIPTOR' : _TESTALLEXTENSIONS,
+  '__module__' : 'google.protobuf.pyext.python_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.python.internal.TestAllExtensions)
+  })
+_sym_db.RegisterMessage(TestAllExtensions)
+
+optional_nested_message_extension.message_type = _TESTALLTYPES_NESTEDMESSAGE
+TestAllExtensions.RegisterExtension(optional_nested_message_extension)
+repeated_nested_message_extension.message_type = _TESTALLTYPES_NESTEDMESSAGE
+TestAllExtensions.RegisterExtension(repeated_nested_message_extension)
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/reflection.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/reflection.py
new file mode 100644
index 0000000..81e1885
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/reflection.py
@@ -0,0 +1,95 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# This code is meant to work on Python 2.4 and above only.
+
+"""Contains a metaclass and helper functions used to create
+protocol message classes from Descriptor objects at runtime.
+
+Recall that a metaclass is the "type" of a class.
+(A class is to a metaclass what an instance is to a class.)
+
+In this case, we use the GeneratedProtocolMessageType metaclass
+to inject all the useful functionality into the classes
+output by the protocol compiler at compile-time.
+
+The upshot of all this is that the real implementation
+details for ALL pure-Python protocol buffers are *here in
+this file*.
+"""
+
+__author__ = 'robinson@google.com (Will Robinson)'
+
+
+from google.protobuf import message_factory
+from google.protobuf import symbol_database
+
+# The type of all Message classes.
+# Part of the public interface, but normally only used by message factories.
+GeneratedProtocolMessageType = message_factory._GENERATED_PROTOCOL_MESSAGE_TYPE
+
+MESSAGE_CLASS_CACHE = {}
+
+
+# Deprecated. Please NEVER use reflection.ParseMessage().
+def ParseMessage(descriptor, byte_str):
+  """Generate a new Message instance from this Descriptor and a byte string.
+
+  DEPRECATED: ParseMessage is deprecated because it is using MakeClass().
+  Please use MessageFactory.GetPrototype() instead.
+
+  Args:
+    descriptor: Protobuf Descriptor object
+    byte_str: Serialized protocol buffer byte string
+
+  Returns:
+    Newly created protobuf Message object.
+  """
+  result_class = MakeClass(descriptor)
+  new_msg = result_class()
+  new_msg.ParseFromString(byte_str)
+  return new_msg
+
+
+# Deprecated. Please NEVER use reflection.MakeClass().
+def MakeClass(descriptor):
+  """Construct a class object for a protobuf described by descriptor.
+
+  DEPRECATED: use MessageFactory.GetPrototype() instead.
+
+  Args:
+    descriptor: A descriptor.Descriptor object describing the protobuf.
+  Returns:
+    The Message class object described by the descriptor.
+  """
+  # Original implementation leads to duplicate message classes, which won't play
+  # well with extensions. Message factory info is also missing.
+  # Redirect to message_factory.
+  return symbol_database.Default().GetPrototype(descriptor)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/service.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/service.py
new file mode 100644
index 0000000..5625246
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/service.py
@@ -0,0 +1,228 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""DEPRECATED:  Declares the RPC service interfaces.
+
+This module declares the abstract interfaces underlying proto2 RPC
+services.  These are intended to be independent of any particular RPC
+implementation, so that proto2 services can be used on top of a variety
+of implementations.  Starting with version 2.3.0, RPC implementations should
+not try to build on these, but should instead provide code generator plugins
+which generate code specific to the particular RPC implementation.  This way
+the generated code can be more appropriate for the implementation in use
+and can avoid unnecessary layers of indirection.
+"""
+
+__author__ = 'petar@google.com (Petar Petrov)'
+
+
+class RpcException(Exception):
+  """Exception raised on failed blocking RPC method call."""
+  pass
+
+
+class Service(object):
+
+  """Abstract base interface for protocol-buffer-based RPC services.
+
+  Services themselves are abstract classes (implemented either by servers or as
+  stubs), but they subclass this base interface. The methods of this
+  interface can be used to call the methods of the service without knowing
+  its exact type at compile time (analogous to the Message interface).
+  """
+
+  def GetDescriptor():
+    """Retrieves this service's descriptor."""
+    raise NotImplementedError
+
+  def CallMethod(self, method_descriptor, rpc_controller,
+                 request, done):
+    """Calls a method of the service specified by method_descriptor.
+
+    If "done" is None then the call is blocking and the response
+    message will be returned directly.  Otherwise the call is asynchronous
+    and "done" will later be called with the response value.
+
+    In the blocking case, RpcException will be raised on error.
+
+    Preconditions:
+
+    * method_descriptor.service == GetDescriptor
+    * request is of the exact same classes as returned by
+      GetRequestClass(method).
+    * After the call has started, the request must not be modified.
+    * "rpc_controller" is of the correct type for the RPC implementation being
+      used by this Service.  For stubs, the "correct type" depends on the
+      RpcChannel which the stub is using.
+
+    Postconditions:
+
+    * "done" will be called when the method is complete.  This may be
+      before CallMethod() returns or it may be at some point in the future.
+    * If the RPC failed, the response value passed to "done" will be None.
+      Further details about the failure can be found by querying the
+      RpcController.
+    """
+    raise NotImplementedError
+
+  def GetRequestClass(self, method_descriptor):
+    """Returns the class of the request message for the specified method.
+
+    CallMethod() requires that the request is of a particular subclass of
+    Message. GetRequestClass() gets the default instance of this required
+    type.
+
+    Example:
+      method = service.GetDescriptor().FindMethodByName("Foo")
+      request = stub.GetRequestClass(method)()
+      request.ParseFromString(input)
+      service.CallMethod(method, request, callback)
+    """
+    raise NotImplementedError
+
+  def GetResponseClass(self, method_descriptor):
+    """Returns the class of the response message for the specified method.
+
+    This method isn't really needed, as the RpcChannel's CallMethod constructs
+    the response protocol message. It's provided anyway in case it is useful
+    for the caller to know the response type in advance.
+    """
+    raise NotImplementedError
+
+
+class RpcController(object):
+
+  """An RpcController mediates a single method call.
+
+  The primary purpose of the controller is to provide a way to manipulate
+  settings specific to the RPC implementation and to find out about RPC-level
+  errors. The methods provided by the RpcController interface are intended
+  to be a "least common denominator" set of features which we expect all
+  implementations to support.  Specific implementations may provide more
+  advanced features (e.g. deadline propagation).
+  """
+
+  # Client-side methods below
+
+  def Reset(self):
+    """Resets the RpcController to its initial state.
+
+    After the RpcController has been reset, it may be reused in
+    a new call. Must not be called while an RPC is in progress.
+    """
+    raise NotImplementedError
+
+  def Failed(self):
+    """Returns true if the call failed.
+
+    After a call has finished, returns true if the call failed.  The possible
+    reasons for failure depend on the RPC implementation.  Failed() must not
+    be called before a call has finished.  If Failed() returns true, the
+    contents of the response message are undefined.
+    """
+    raise NotImplementedError
+
+  def ErrorText(self):
+    """If Failed is true, returns a human-readable description of the error."""
+    raise NotImplementedError
+
+  def StartCancel(self):
+    """Initiate cancellation.
+
+    Advises the RPC system that the caller desires that the RPC call be
+    canceled.  The RPC system may cancel it immediately, may wait awhile and
+    then cancel it, or may not even cancel the call at all.  If the call is
+    canceled, the "done" callback will still be called and the RpcController
+    will indicate that the call failed at that time.
+    """
+    raise NotImplementedError
+
+  # Server-side methods below
+
+  def SetFailed(self, reason):
+    """Sets a failure reason.
+
+    Causes Failed() to return true on the client side.  "reason" will be
+    incorporated into the message returned by ErrorText().  If you find
+    you need to return machine-readable information about failures, you
+    should incorporate it into your response protocol buffer and should
+    NOT call SetFailed().
+    """
+    raise NotImplementedError
+
+  def IsCanceled(self):
+    """Checks if the client cancelled the RPC.
+
+    If true, indicates that the client canceled the RPC, so the server may
+    as well give up on replying to it.  The server should still call the
+    final "done" callback.
+    """
+    raise NotImplementedError
+
+  def NotifyOnCancel(self, callback):
+    """Sets a callback to invoke on cancel.
+
+    Asks that the given callback be called when the RPC is canceled.  The
+    callback will always be called exactly once.  If the RPC completes without
+    being canceled, the callback will be called after completion.  If the RPC
+    has already been canceled when NotifyOnCancel() is called, the callback
+    will be called immediately.
+
+    NotifyOnCancel() must be called no more than once per request.
+    """
+    raise NotImplementedError
+
+
+class RpcChannel(object):
+
+  """Abstract interface for an RPC channel.
+
+  An RpcChannel represents a communication line to a service which can be used
+  to call that service's methods.  The service may be running on another
+  machine. Normally, you should not use an RpcChannel directly, but instead
+  construct a stub {@link Service} wrapping it.  Example:
+
+  Example:
+    RpcChannel channel = rpcImpl.Channel("remotehost.example.com:1234")
+    RpcController controller = rpcImpl.Controller()
+    MyService service = MyService_Stub(channel)
+    service.MyMethod(controller, request, callback)
+  """
+
+  def CallMethod(self, method_descriptor, rpc_controller,
+                 request, response_class, done):
+    """Calls the method identified by the descriptor.
+
+    Call the given method of the remote service.  The signature of this
+    procedure looks the same as Service.CallMethod(), but the requirements
+    are less strict in one important way:  the request object doesn't have to
+    be of any specific class as long as its descriptor is method.input_type.
+    """
+    raise NotImplementedError
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/service_reflection.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/service_reflection.py
new file mode 100644
index 0000000..8590e46
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/service_reflection.py
@@ -0,0 +1,300 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Contains metaclasses used to create protocol service and service stub
+classes from ServiceDescriptor objects at runtime.
+
+The GeneratedServiceType and GeneratedServiceStubType metaclasses are used to
+inject all useful functionality into the classes output by the protocol
+compiler at compile-time.
+"""
+
+__author__ = 'petar@google.com (Petar Petrov)'
+
+from google.protobuf.internal import api_implementation
+
+if api_implementation.Type() == 'cpp':
+  # pylint: disable=g-import-not-at-top
+  from google.protobuf.pyext import _message
+
+
+class GeneratedServiceType(type):
+
+  """Metaclass for service classes created at runtime from ServiceDescriptors.
+
+  Implementations for all methods described in the Service class are added here
+  by this class. We also create properties to allow getting/setting all fields
+  in the protocol message.
+
+  The protocol compiler currently uses this metaclass to create protocol service
+  classes at runtime. Clients can also manually create their own classes at
+  runtime, as in this example::
+
+    mydescriptor = ServiceDescriptor(.....)
+    class MyProtoService(service.Service):
+      __metaclass__ = GeneratedServiceType
+      DESCRIPTOR = mydescriptor
+    myservice_instance = MyProtoService()
+    # ...
+  """
+
+  _DESCRIPTOR_KEY = 'DESCRIPTOR'
+
+  def __init__(cls, name, bases, dictionary):
+    """Creates a message service class.
+
+    Args:
+      name: Name of the class (ignored, but required by the metaclass
+        protocol).
+      bases: Base classes of the class being constructed.
+      dictionary: The class dictionary of the class being constructed.
+        dictionary[_DESCRIPTOR_KEY] must contain a ServiceDescriptor object
+        describing this protocol service type.
+    """
+    # Don't do anything if this class doesn't have a descriptor. This happens
+    # when a service class is subclassed.
+    if GeneratedServiceType._DESCRIPTOR_KEY not in dictionary:
+      return
+
+    descriptor = dictionary[GeneratedServiceType._DESCRIPTOR_KEY]
+    if isinstance(descriptor, str):
+      descriptor = _message.default_pool.FindServiceByName(descriptor)
+      dictionary[GeneratedServiceType._DESCRIPTOR_KEY] = descriptor
+
+    service_builder = _ServiceBuilder(descriptor)
+    service_builder.BuildService(cls)
+    cls.DESCRIPTOR = descriptor
+
+
+class GeneratedServiceStubType(GeneratedServiceType):
+
+  """Metaclass for service stubs created at runtime from ServiceDescriptors.
+
+  This class has similar responsibilities as GeneratedServiceType, except that
+  it creates the service stub classes.
+  """
+
+  _DESCRIPTOR_KEY = 'DESCRIPTOR'
+
+  def __init__(cls, name, bases, dictionary):
+    """Creates a message service stub class.
+
+    Args:
+      name: Name of the class (ignored, here).
+      bases: Base classes of the class being constructed.
+      dictionary: The class dictionary of the class being constructed.
+        dictionary[_DESCRIPTOR_KEY] must contain a ServiceDescriptor object
+        describing this protocol service type.
+    """
+    descriptor = dictionary.get(cls._DESCRIPTOR_KEY)
+    if isinstance(descriptor, str):
+      descriptor = _message.default_pool.FindServiceByName(descriptor)
+      dictionary[GeneratedServiceStubType._DESCRIPTOR_KEY] = descriptor
+    super(GeneratedServiceStubType, cls).__init__(name, bases, dictionary)
+    # Don't do anything if this class doesn't have a descriptor. This happens
+    # when a service stub is subclassed.
+    if GeneratedServiceStubType._DESCRIPTOR_KEY not in dictionary:
+      return
+
+    service_stub_builder = _ServiceStubBuilder(descriptor)
+    service_stub_builder.BuildServiceStub(cls)
+
+
+class _ServiceBuilder(object):
+
+  """This class constructs a protocol service class using a service descriptor.
+
+  Given a service descriptor, this class constructs a class that represents
+  the specified service descriptor. One service builder instance constructs
+  exactly one service class. That means all instances of that class share the
+  same builder.
+  """
+
+  def __init__(self, service_descriptor):
+    """Initializes an instance of the service class builder.
+
+    Args:
+      service_descriptor: ServiceDescriptor to use when constructing the
+        service class.
+    """
+    self.descriptor = service_descriptor
+
+  def BuildService(self, cls):
+    """Constructs the service class.
+
+    Args:
+      cls: The class that will be constructed.
+    """
+
+    # CallMethod needs to operate with an instance of the Service class. This
+    # internal wrapper function exists only to be able to pass the service
+    # instance to the method that does the real CallMethod work.
+    def _WrapCallMethod(srvc, method_descriptor,
+                        rpc_controller, request, callback):
+      return self._CallMethod(srvc, method_descriptor,
+                       rpc_controller, request, callback)
+    self.cls = cls
+    cls.CallMethod = _WrapCallMethod
+    cls.GetDescriptor = staticmethod(lambda: self.descriptor)
+    cls.GetDescriptor.__doc__ = "Returns the service descriptor."
+    cls.GetRequestClass = self._GetRequestClass
+    cls.GetResponseClass = self._GetResponseClass
+    for method in self.descriptor.methods:
+      setattr(cls, method.name, self._GenerateNonImplementedMethod(method))
+
+  def _CallMethod(self, srvc, method_descriptor,
+                  rpc_controller, request, callback):
+    """Calls the method described by a given method descriptor.
+
+    Args:
+      srvc: Instance of the service for which this method is called.
+      method_descriptor: Descriptor that represent the method to call.
+      rpc_controller: RPC controller to use for this method's execution.
+      request: Request protocol message.
+      callback: A callback to invoke after the method has completed.
+    """
+    if method_descriptor.containing_service != self.descriptor:
+      raise RuntimeError(
+          'CallMethod() given method descriptor for wrong service type.')
+    method = getattr(srvc, method_descriptor.name)
+    return method(rpc_controller, request, callback)
+
+  def _GetRequestClass(self, method_descriptor):
+    """Returns the class of the request protocol message.
+
+    Args:
+      method_descriptor: Descriptor of the method for which to return the
+        request protocol message class.
+
+    Returns:
+      A class that represents the input protocol message of the specified
+      method.
+    """
+    if method_descriptor.containing_service != self.descriptor:
+      raise RuntimeError(
+          'GetRequestClass() given method descriptor for wrong service type.')
+    return method_descriptor.input_type._concrete_class
+
+  def _GetResponseClass(self, method_descriptor):
+    """Returns the class of the response protocol message.
+
+    Args:
+      method_descriptor: Descriptor of the method for which to return the
+        response protocol message class.
+
+    Returns:
+      A class that represents the output protocol message of the specified
+      method.
+    """
+    if method_descriptor.containing_service != self.descriptor:
+      raise RuntimeError(
+          'GetResponseClass() given method descriptor for wrong service type.')
+    return method_descriptor.output_type._concrete_class
+
+  def _GenerateNonImplementedMethod(self, method):
+    """Generates and returns a method that can be set for a service methods.
+
+    Args:
+      method: Descriptor of the service method for which a method is to be
+        generated.
+
+    Returns:
+      A method that can be added to the service class.
+    """
+    return lambda inst, rpc_controller, request, callback: (
+        self._NonImplementedMethod(method.name, rpc_controller, callback))
+
+  def _NonImplementedMethod(self, method_name, rpc_controller, callback):
+    """The body of all methods in the generated service class.
+
+    Args:
+      method_name: Name of the method being executed.
+      rpc_controller: RPC controller used to execute this method.
+      callback: A callback which will be invoked when the method finishes.
+    """
+    rpc_controller.SetFailed('Method %s not implemented.' % method_name)
+    callback(None)
+
+
+class _ServiceStubBuilder(object):
+
+  """Constructs a protocol service stub class using a service descriptor.
+
+  Given a service descriptor, this class constructs a suitable stub class.
+  A stub is just a type-safe wrapper around an RpcChannel which emulates a
+  local implementation of the service.
+
+  One service stub builder instance constructs exactly one class. It means all
+  instances of that class share the same service stub builder.
+  """
+
+  def __init__(self, service_descriptor):
+    """Initializes an instance of the service stub class builder.
+
+    Args:
+      service_descriptor: ServiceDescriptor to use when constructing the
+        stub class.
+    """
+    self.descriptor = service_descriptor
+
+  def BuildServiceStub(self, cls):
+    """Constructs the stub class.
+
+    Args:
+      cls: The class that will be constructed.
+    """
+
+    def _ServiceStubInit(stub, rpc_channel):
+      stub.rpc_channel = rpc_channel
+    self.cls = cls
+    cls.__init__ = _ServiceStubInit
+    for method in self.descriptor.methods:
+      setattr(cls, method.name, self._GenerateStubMethod(method))
+
+  def _GenerateStubMethod(self, method):
+    return (lambda inst, rpc_controller, request, callback=None:
+        self._StubMethod(inst, method, rpc_controller, request, callback))
+
+  def _StubMethod(self, stub, method_descriptor,
+                  rpc_controller, request, callback):
+    """The body of all service methods in the generated stub class.
+
+    Args:
+      stub: Stub instance.
+      method_descriptor: Descriptor of the invoked method.
+      rpc_controller: Rpc controller to execute the method.
+      request: Request protocol message.
+      callback: A callback to execute when the method finishes.
+    Returns:
+      Response message (in case of blocking call).
+    """
+    return stub.rpc_channel.CallMethod(
+        method_descriptor, rpc_controller, request,
+        method_descriptor.output_type._concrete_class, callback)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/source_context_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/source_context_pb2.py
new file mode 100644
index 0000000..62d6fe5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/source_context_pb2.py
@@ -0,0 +1,71 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/source_context.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/source_context.proto',
+  package='google.protobuf',
+  syntax='proto3',
+  serialized_options=b'\n\023com.google.protobufB\022SourceContextProtoP\001ZAgoogle.golang.org/genproto/protobuf/source_context;source_context\242\002\003GPB\252\002\036Google.Protobuf.WellKnownTypes',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n$google/protobuf/source_context.proto\x12\x0fgoogle.protobuf\"\"\n\rSourceContext\x12\x11\n\tfile_name\x18\x01 \x01(\tB\x95\x01\n\x13\x63om.google.protobufB\x12SourceContextProtoP\x01ZAgoogle.golang.org/genproto/protobuf/source_context;source_context\xa2\x02\x03GPB\xaa\x02\x1eGoogle.Protobuf.WellKnownTypesb\x06proto3'
+)
+
+
+
+
+_SOURCECONTEXT = _descriptor.Descriptor(
+  name='SourceContext',
+  full_name='google.protobuf.SourceContext',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='file_name', full_name='google.protobuf.SourceContext.file_name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=57,
+  serialized_end=91,
+)
+
+DESCRIPTOR.message_types_by_name['SourceContext'] = _SOURCECONTEXT
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+SourceContext = _reflection.GeneratedProtocolMessageType('SourceContext', (_message.Message,), {
+  'DESCRIPTOR' : _SOURCECONTEXT,
+  '__module__' : 'google.protobuf.source_context_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.SourceContext)
+  })
+_sym_db.RegisterMessage(SourceContext)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/struct_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/struct_pb2.py
new file mode 100644
index 0000000..53cd2d1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/struct_pb2.py
@@ -0,0 +1,287 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/struct.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/struct.proto',
+  package='google.protobuf',
+  syntax='proto3',
+  serialized_options=b'\n\023com.google.protobufB\013StructProtoP\001Z1github.com/golang/protobuf/ptypes/struct;structpb\370\001\001\242\002\003GPB\252\002\036Google.Protobuf.WellKnownTypes',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\x1cgoogle/protobuf/struct.proto\x12\x0fgoogle.protobuf\"\x84\x01\n\x06Struct\x12\x33\n\x06\x66ields\x18\x01 \x03(\x0b\x32#.google.protobuf.Struct.FieldsEntry\x1a\x45\n\x0b\x46ieldsEntry\x12\x0b\n\x03key\x18\x01 \x01(\t\x12%\n\x05value\x18\x02 \x01(\x0b\x32\x16.google.protobuf.Value:\x02\x38\x01\"\xea\x01\n\x05Value\x12\x30\n\nnull_value\x18\x01 \x01(\x0e\x32\x1a.google.protobuf.NullValueH\x00\x12\x16\n\x0cnumber_value\x18\x02 \x01(\x01H\x00\x12\x16\n\x0cstring_value\x18\x03 \x01(\tH\x00\x12\x14\n\nbool_value\x18\x04 \x01(\x08H\x00\x12/\n\x0cstruct_value\x18\x05 \x01(\x0b\x32\x17.google.protobuf.StructH\x00\x12\x30\n\nlist_value\x18\x06 \x01(\x0b\x32\x1a.google.protobuf.ListValueH\x00\x42\x06\n\x04kind\"3\n\tListValue\x12&\n\x06values\x18\x01 \x03(\x0b\x32\x16.google.protobuf.Value*\x1b\n\tNullValue\x12\x0e\n\nNULL_VALUE\x10\x00\x42\x81\x01\n\x13\x63om.google.protobufB\x0bStructProtoP\x01Z1github.com/golang/protobuf/ptypes/struct;structpb\xf8\x01\x01\xa2\x02\x03GPB\xaa\x02\x1eGoogle.Protobuf.WellKnownTypesb\x06proto3'
+)
+
+_NULLVALUE = _descriptor.EnumDescriptor(
+  name='NullValue',
+  full_name='google.protobuf.NullValue',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='NULL_VALUE', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=474,
+  serialized_end=501,
+)
+_sym_db.RegisterEnumDescriptor(_NULLVALUE)
+
+NullValue = enum_type_wrapper.EnumTypeWrapper(_NULLVALUE)
+NULL_VALUE = 0
+
+
+
+_STRUCT_FIELDSENTRY = _descriptor.Descriptor(
+  name='FieldsEntry',
+  full_name='google.protobuf.Struct.FieldsEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='google.protobuf.Struct.FieldsEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.Struct.FieldsEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=113,
+  serialized_end=182,
+)
+
+_STRUCT = _descriptor.Descriptor(
+  name='Struct',
+  full_name='google.protobuf.Struct',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='fields', full_name='google.protobuf.Struct.fields', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_STRUCT_FIELDSENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=50,
+  serialized_end=182,
+)
+
+
+_VALUE = _descriptor.Descriptor(
+  name='Value',
+  full_name='google.protobuf.Value',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='null_value', full_name='google.protobuf.Value.null_value', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='number_value', full_name='google.protobuf.Value.number_value', index=1,
+      number=2, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_value', full_name='google.protobuf.Value.string_value', index=2,
+      number=3, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bool_value', full_name='google.protobuf.Value.bool_value', index=3,
+      number=4, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='struct_value', full_name='google.protobuf.Value.struct_value', index=4,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='list_value', full_name='google.protobuf.Value.list_value', index=5,
+      number=6, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='kind', full_name='google.protobuf.Value.kind',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=185,
+  serialized_end=419,
+)
+
+
+_LISTVALUE = _descriptor.Descriptor(
+  name='ListValue',
+  full_name='google.protobuf.ListValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='values', full_name='google.protobuf.ListValue.values', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=421,
+  serialized_end=472,
+)
+
+_STRUCT_FIELDSENTRY.fields_by_name['value'].message_type = _VALUE
+_STRUCT_FIELDSENTRY.containing_type = _STRUCT
+_STRUCT.fields_by_name['fields'].message_type = _STRUCT_FIELDSENTRY
+_VALUE.fields_by_name['null_value'].enum_type = _NULLVALUE
+_VALUE.fields_by_name['struct_value'].message_type = _STRUCT
+_VALUE.fields_by_name['list_value'].message_type = _LISTVALUE
+_VALUE.oneofs_by_name['kind'].fields.append(
+  _VALUE.fields_by_name['null_value'])
+_VALUE.fields_by_name['null_value'].containing_oneof = _VALUE.oneofs_by_name['kind']
+_VALUE.oneofs_by_name['kind'].fields.append(
+  _VALUE.fields_by_name['number_value'])
+_VALUE.fields_by_name['number_value'].containing_oneof = _VALUE.oneofs_by_name['kind']
+_VALUE.oneofs_by_name['kind'].fields.append(
+  _VALUE.fields_by_name['string_value'])
+_VALUE.fields_by_name['string_value'].containing_oneof = _VALUE.oneofs_by_name['kind']
+_VALUE.oneofs_by_name['kind'].fields.append(
+  _VALUE.fields_by_name['bool_value'])
+_VALUE.fields_by_name['bool_value'].containing_oneof = _VALUE.oneofs_by_name['kind']
+_VALUE.oneofs_by_name['kind'].fields.append(
+  _VALUE.fields_by_name['struct_value'])
+_VALUE.fields_by_name['struct_value'].containing_oneof = _VALUE.oneofs_by_name['kind']
+_VALUE.oneofs_by_name['kind'].fields.append(
+  _VALUE.fields_by_name['list_value'])
+_VALUE.fields_by_name['list_value'].containing_oneof = _VALUE.oneofs_by_name['kind']
+_LISTVALUE.fields_by_name['values'].message_type = _VALUE
+DESCRIPTOR.message_types_by_name['Struct'] = _STRUCT
+DESCRIPTOR.message_types_by_name['Value'] = _VALUE
+DESCRIPTOR.message_types_by_name['ListValue'] = _LISTVALUE
+DESCRIPTOR.enum_types_by_name['NullValue'] = _NULLVALUE
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Struct = _reflection.GeneratedProtocolMessageType('Struct', (_message.Message,), {
+
+  'FieldsEntry' : _reflection.GeneratedProtocolMessageType('FieldsEntry', (_message.Message,), {
+    'DESCRIPTOR' : _STRUCT_FIELDSENTRY,
+    '__module__' : 'google.protobuf.struct_pb2'
+    # @@protoc_insertion_point(class_scope:google.protobuf.Struct.FieldsEntry)
+    })
+  ,
+  'DESCRIPTOR' : _STRUCT,
+  '__module__' : 'google.protobuf.struct_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Struct)
+  })
+_sym_db.RegisterMessage(Struct)
+_sym_db.RegisterMessage(Struct.FieldsEntry)
+
+Value = _reflection.GeneratedProtocolMessageType('Value', (_message.Message,), {
+  'DESCRIPTOR' : _VALUE,
+  '__module__' : 'google.protobuf.struct_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Value)
+  })
+_sym_db.RegisterMessage(Value)
+
+ListValue = _reflection.GeneratedProtocolMessageType('ListValue', (_message.Message,), {
+  'DESCRIPTOR' : _LISTVALUE,
+  '__module__' : 'google.protobuf.struct_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.ListValue)
+  })
+_sym_db.RegisterMessage(ListValue)
+
+
+DESCRIPTOR._options = None
+_STRUCT_FIELDSENTRY._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/symbol_database.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/symbol_database.py
new file mode 100644
index 0000000..fdcf8cf
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/symbol_database.py
@@ -0,0 +1,194 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""A database of Python protocol buffer generated symbols.
+
+SymbolDatabase is the MessageFactory for messages generated at compile time,
+and makes it easy to create new instances of a registered type, given only the
+type's protocol buffer symbol name.
+
+Example usage::
+
+  db = symbol_database.SymbolDatabase()
+
+  # Register symbols of interest, from one or multiple files.
+  db.RegisterFileDescriptor(my_proto_pb2.DESCRIPTOR)
+  db.RegisterMessage(my_proto_pb2.MyMessage)
+  db.RegisterEnumDescriptor(my_proto_pb2.MyEnum.DESCRIPTOR)
+
+  # The database can be used as a MessageFactory, to generate types based on
+  # their name:
+  types = db.GetMessages(['my_proto.proto'])
+  my_message_instance = types['MyMessage']()
+
+  # The database's underlying descriptor pool can be queried, so it's not
+  # necessary to know a type's filename to be able to generate it:
+  filename = db.pool.FindFileContainingSymbol('MyMessage')
+  my_message_instance = db.GetMessages([filename])['MyMessage']()
+
+  # This functionality is also provided directly via a convenience method:
+  my_message_instance = db.GetSymbol('MyMessage')()
+"""
+
+
+from google.protobuf.internal import api_implementation
+from google.protobuf import descriptor_pool
+from google.protobuf import message_factory
+
+
+class SymbolDatabase(message_factory.MessageFactory):
+  """A database of Python generated symbols."""
+
+  def RegisterMessage(self, message):
+    """Registers the given message type in the local database.
+
+    Calls to GetSymbol() and GetMessages() will return messages registered here.
+
+    Args:
+      message: A :class:`google.protobuf.message.Message` subclass (or
+        instance); its descriptor will be registered.
+
+    Returns:
+      The provided message.
+    """
+
+    desc = message.DESCRIPTOR
+    self._classes[desc] = message
+    self.RegisterMessageDescriptor(desc)
+    return message
+
+  def RegisterMessageDescriptor(self, message_descriptor):
+    """Registers the given message descriptor in the local database.
+
+    Args:
+      message_descriptor (Descriptor): the message descriptor to add.
+    """
+    if api_implementation.Type() == 'python':
+      # pylint: disable=protected-access
+      self.pool._AddDescriptor(message_descriptor)
+
+  def RegisterEnumDescriptor(self, enum_descriptor):
+    """Registers the given enum descriptor in the local database.
+
+    Args:
+      enum_descriptor (EnumDescriptor): The enum descriptor to register.
+
+    Returns:
+      EnumDescriptor: The provided descriptor.
+    """
+    if api_implementation.Type() == 'python':
+      # pylint: disable=protected-access
+      self.pool._AddEnumDescriptor(enum_descriptor)
+    return enum_descriptor
+
+  def RegisterServiceDescriptor(self, service_descriptor):
+    """Registers the given service descriptor in the local database.
+
+    Args:
+      service_descriptor (ServiceDescriptor): the service descriptor to
+        register.
+    """
+    if api_implementation.Type() == 'python':
+      # pylint: disable=protected-access
+      self.pool._AddServiceDescriptor(service_descriptor)
+
+  def RegisterFileDescriptor(self, file_descriptor):
+    """Registers the given file descriptor in the local database.
+
+    Args:
+      file_descriptor (FileDescriptor): The file descriptor to register.
+    """
+    if api_implementation.Type() == 'python':
+      # pylint: disable=protected-access
+      self.pool._InternalAddFileDescriptor(file_descriptor)
+
+  def GetSymbol(self, symbol):
+    """Tries to find a symbol in the local database.
+
+    Currently, this method only returns message.Message instances, however, if
+    may be extended in future to support other symbol types.
+
+    Args:
+      symbol (str): a protocol buffer symbol.
+
+    Returns:
+      A Python class corresponding to the symbol.
+
+    Raises:
+      KeyError: if the symbol could not be found.
+    """
+
+    return self._classes[self.pool.FindMessageTypeByName(symbol)]
+
+  def GetMessages(self, files):
+    # TODO(amauryfa): Fix the differences with MessageFactory.
+    """Gets all registered messages from a specified file.
+
+    Only messages already created and registered will be returned; (this is the
+    case for imported _pb2 modules)
+    But unlike MessageFactory, this version also returns already defined nested
+    messages, but does not register any message extensions.
+
+    Args:
+      files (list[str]): The file names to extract messages from.
+
+    Returns:
+      A dictionary mapping proto names to the message classes.
+
+    Raises:
+      KeyError: if a file could not be found.
+    """
+
+    def _GetAllMessages(desc):
+      """Walk a message Descriptor and recursively yields all message names."""
+      yield desc
+      for msg_desc in desc.nested_types:
+        for nested_desc in _GetAllMessages(msg_desc):
+          yield nested_desc
+
+    result = {}
+    for file_name in files:
+      file_desc = self.pool.FindFileByName(file_name)
+      for msg_desc in file_desc.message_types_by_name.values():
+        for desc in _GetAllMessages(msg_desc):
+          try:
+            result[desc.full_name] = self._classes[desc]
+          except KeyError:
+            # This descriptor has no registered class, skip it.
+            pass
+    return result
+
+
+_DEFAULT = SymbolDatabase(pool=descriptor_pool.Default())
+
+
+def Default():
+  """Returns the default SymbolDatabase."""
+  return _DEFAULT
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/test_messages_proto2_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/test_messages_proto2_pb2.py
new file mode 100644
index 0000000..ba9d212
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/test_messages_proto2_pb2.py
@@ -0,0 +1,2370 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/test_messages_proto2.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/test_messages_proto2.proto',
+  package='protobuf_test_messages.proto2',
+  syntax='proto2',
+  serialized_options=b'\n(com.google.protobuf_test_messages.proto2H\001\370\001\001',
+  create_key=_descriptor._internal_create_key,
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+)
+
+_FOREIGNENUMPROTO2 = _descriptor.EnumDescriptor(
+  name='ForeignEnumProto2',
+  full_name='protobuf_test_messages.proto2.ForeignEnumProto2',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_BAR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_BAZ', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=7861,
+  serialized_end=7931,
+)
+_sym_db.RegisterEnumDescriptor(_FOREIGNENUMPROTO2)
+
+ForeignEnumProto2 = enum_type_wrapper.EnumTypeWrapper(_FOREIGNENUMPROTO2)
+FOREIGN_FOO = 0
+FOREIGN_BAR = 1
+FOREIGN_BAZ = 2
+
+EXTENSION_INT32_FIELD_NUMBER = 120
+extension_int32 = _descriptor.FieldDescriptor(
+  name='extension_int32', full_name='protobuf_test_messages.proto2.extension_int32', index=0,
+  number=120, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+_TESTALLTYPESPROTO2_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAZ', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='NEG', index=3, number=-1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=7413,
+  serialized_end=7470,
+)
+_sym_db.RegisterEnumDescriptor(_TESTALLTYPESPROTO2_NESTEDENUM)
+
+
+_TESTALLTYPESPROTO2_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.NestedMessage.a', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='corecursive', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.NestedMessage.corecursive', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5454,
+  serialized_end=5552,
+)
+
+_TESTALLTYPESPROTO2_MAPINT32INT32ENTRY = _descriptor.Descriptor(
+  name='MapInt32Int32Entry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32Int32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32Int32Entry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32Int32Entry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5554,
+  serialized_end=5606,
+)
+
+_TESTALLTYPESPROTO2_MAPINT64INT64ENTRY = _descriptor.Descriptor(
+  name='MapInt64Int64Entry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt64Int64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt64Int64Entry.key', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt64Int64Entry.value', index=1,
+      number=2, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5608,
+  serialized_end=5660,
+)
+
+_TESTALLTYPESPROTO2_MAPUINT32UINT32ENTRY = _descriptor.Descriptor(
+  name='MapUint32Uint32Entry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapUint32Uint32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapUint32Uint32Entry.key', index=0,
+      number=1, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapUint32Uint32Entry.value', index=1,
+      number=2, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5662,
+  serialized_end=5716,
+)
+
+_TESTALLTYPESPROTO2_MAPUINT64UINT64ENTRY = _descriptor.Descriptor(
+  name='MapUint64Uint64Entry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapUint64Uint64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapUint64Uint64Entry.key', index=0,
+      number=1, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapUint64Uint64Entry.value', index=1,
+      number=2, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5718,
+  serialized_end=5772,
+)
+
+_TESTALLTYPESPROTO2_MAPSINT32SINT32ENTRY = _descriptor.Descriptor(
+  name='MapSint32Sint32Entry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSint32Sint32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSint32Sint32Entry.key', index=0,
+      number=1, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSint32Sint32Entry.value', index=1,
+      number=2, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5774,
+  serialized_end=5828,
+)
+
+_TESTALLTYPESPROTO2_MAPSINT64SINT64ENTRY = _descriptor.Descriptor(
+  name='MapSint64Sint64Entry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSint64Sint64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSint64Sint64Entry.key', index=0,
+      number=1, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSint64Sint64Entry.value', index=1,
+      number=2, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5830,
+  serialized_end=5884,
+)
+
+_TESTALLTYPESPROTO2_MAPFIXED32FIXED32ENTRY = _descriptor.Descriptor(
+  name='MapFixed32Fixed32Entry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapFixed32Fixed32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapFixed32Fixed32Entry.key', index=0,
+      number=1, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapFixed32Fixed32Entry.value', index=1,
+      number=2, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5886,
+  serialized_end=5942,
+)
+
+_TESTALLTYPESPROTO2_MAPFIXED64FIXED64ENTRY = _descriptor.Descriptor(
+  name='MapFixed64Fixed64Entry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapFixed64Fixed64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapFixed64Fixed64Entry.key', index=0,
+      number=1, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapFixed64Fixed64Entry.value', index=1,
+      number=2, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5944,
+  serialized_end=6000,
+)
+
+_TESTALLTYPESPROTO2_MAPSFIXED32SFIXED32ENTRY = _descriptor.Descriptor(
+  name='MapSfixed32Sfixed32Entry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSfixed32Sfixed32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSfixed32Sfixed32Entry.key', index=0,
+      number=1, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSfixed32Sfixed32Entry.value', index=1,
+      number=2, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6002,
+  serialized_end=6060,
+)
+
+_TESTALLTYPESPROTO2_MAPSFIXED64SFIXED64ENTRY = _descriptor.Descriptor(
+  name='MapSfixed64Sfixed64Entry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSfixed64Sfixed64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSfixed64Sfixed64Entry.key', index=0,
+      number=1, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapSfixed64Sfixed64Entry.value', index=1,
+      number=2, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6062,
+  serialized_end=6120,
+)
+
+_TESTALLTYPESPROTO2_MAPINT32FLOATENTRY = _descriptor.Descriptor(
+  name='MapInt32FloatEntry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32FloatEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32FloatEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32FloatEntry.value', index=1,
+      number=2, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6122,
+  serialized_end=6174,
+)
+
+_TESTALLTYPESPROTO2_MAPINT32DOUBLEENTRY = _descriptor.Descriptor(
+  name='MapInt32DoubleEntry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32DoubleEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32DoubleEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32DoubleEntry.value', index=1,
+      number=2, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6176,
+  serialized_end=6229,
+)
+
+_TESTALLTYPESPROTO2_MAPBOOLBOOLENTRY = _descriptor.Descriptor(
+  name='MapBoolBoolEntry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapBoolBoolEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapBoolBoolEntry.key', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapBoolBoolEntry.value', index=1,
+      number=2, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6231,
+  serialized_end=6281,
+)
+
+_TESTALLTYPESPROTO2_MAPSTRINGSTRINGENTRY = _descriptor.Descriptor(
+  name='MapStringStringEntry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringStringEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringStringEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringStringEntry.value', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6283,
+  serialized_end=6337,
+)
+
+_TESTALLTYPESPROTO2_MAPSTRINGBYTESENTRY = _descriptor.Descriptor(
+  name='MapStringBytesEntry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringBytesEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringBytesEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringBytesEntry.value', index=1,
+      number=2, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6339,
+  serialized_end=6392,
+)
+
+_TESTALLTYPESPROTO2_MAPSTRINGNESTEDMESSAGEENTRY = _descriptor.Descriptor(
+  name='MapStringNestedMessageEntry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringNestedMessageEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringNestedMessageEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringNestedMessageEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6394,
+  serialized_end=6520,
+)
+
+_TESTALLTYPESPROTO2_MAPSTRINGFOREIGNMESSAGEENTRY = _descriptor.Descriptor(
+  name='MapStringForeignMessageEntry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringForeignMessageEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringForeignMessageEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringForeignMessageEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6522,
+  serialized_end=6637,
+)
+
+_TESTALLTYPESPROTO2_MAPSTRINGNESTEDENUMENTRY = _descriptor.Descriptor(
+  name='MapStringNestedEnumEntry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringNestedEnumEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringNestedEnumEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringNestedEnumEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6639,
+  serialized_end=6759,
+)
+
+_TESTALLTYPESPROTO2_MAPSTRINGFOREIGNENUMENTRY = _descriptor.Descriptor(
+  name='MapStringForeignEnumEntry',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringForeignEnumEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringForeignEnumEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MapStringForeignEnumEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6761,
+  serialized_end=6870,
+)
+
+_TESTALLTYPESPROTO2_DATA = _descriptor.Descriptor(
+  name='Data',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.Data',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='group_int32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.Data.group_int32', index=0,
+      number=202, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='group_uint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.Data.group_uint32', index=1,
+      number=203, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6872,
+  serialized_end=6923,
+)
+
+_TESTALLTYPESPROTO2_MESSAGESETCORRECT = _descriptor.Descriptor(
+  name='MessageSetCorrect',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MessageSetCorrect',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\010\001',
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(4, 2147483647), ],
+  oneofs=[
+  ],
+  serialized_start=6925,
+  serialized_end=6958,
+)
+
+_TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION1 = _descriptor.Descriptor(
+  name='MessageSetCorrectExtension1',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MessageSetCorrectExtension1',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='str', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MessageSetCorrectExtension1.str', index=0,
+      number=25, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='message_set_extension', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MessageSetCorrectExtension1.message_set_extension', index=0,
+      number=1547769, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6961,
+  serialized_end=7185,
+)
+
+_TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION2 = _descriptor.Descriptor(
+  name='MessageSetCorrectExtension2',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MessageSetCorrectExtension2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='i', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MessageSetCorrectExtension2.i', index=0,
+      number=9, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='message_set_extension', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.MessageSetCorrectExtension2.message_set_extension', index=0,
+      number=4135312, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7188,
+  serialized_end=7411,
+)
+
+_TESTALLTYPESPROTO2 = _descriptor.Descriptor(
+  name='TestAllTypesProto2',
+  full_name='protobuf_test_messages.proto2.TestAllTypesProto2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_int32', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_int64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_int64', index=1,
+      number=2, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_uint32', index=2,
+      number=3, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_uint64', index=3,
+      number=4, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_sint32', index=4,
+      number=5, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sint64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_sint64', index=5,
+      number=6, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_fixed32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_fixed32', index=6,
+      number=7, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_fixed64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_fixed64', index=7,
+      number=8, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sfixed32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_sfixed32', index=8,
+      number=9, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sfixed64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_sfixed64', index=9,
+      number=10, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_float', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_float', index=10,
+      number=11, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_double', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_double', index=11,
+      number=12, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bool', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_bool', index=12,
+      number=13, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_string', index=13,
+      number=14, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bytes', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_bytes', index=14,
+      number=15, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_message', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_nested_message', index=15,
+      number=18, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_foreign_message', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_foreign_message', index=16,
+      number=19, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_enum', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_nested_enum', index=17,
+      number=21, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_foreign_enum', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_foreign_enum', index=18,
+      number=22, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string_piece', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_string_piece', index=19,
+      number=24, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_cord', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.optional_cord', index=20,
+      number=25, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='recursive_message', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.recursive_message', index=21,
+      number=27, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_int32', index=22,
+      number=31, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_int64', index=23,
+      number=32, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_uint32', index=24,
+      number=33, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_uint64', index=25,
+      number=34, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_sint32', index=26,
+      number=35, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_sint64', index=27,
+      number=36, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_fixed32', index=28,
+      number=37, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_fixed64', index=29,
+      number=38, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_sfixed32', index=30,
+      number=39, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_sfixed64', index=31,
+      number=40, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_float', index=32,
+      number=41, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_double', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_double', index=33,
+      number=42, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bool', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_bool', index=34,
+      number=43, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_string', index=35,
+      number=44, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bytes', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_bytes', index=36,
+      number=45, type=12, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_message', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_nested_message', index=37,
+      number=48, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_foreign_message', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_foreign_message', index=38,
+      number=49, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_enum', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_nested_enum', index=39,
+      number=51, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_foreign_enum', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_foreign_enum', index=40,
+      number=52, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string_piece', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_string_piece', index=41,
+      number=54, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_cord', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.repeated_cord', index=42,
+      number=55, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_int32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_int32', index=43,
+      number=75, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_int64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_int64', index=44,
+      number=76, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_uint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_uint32', index=45,
+      number=77, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_uint64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_uint64', index=46,
+      number=78, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_sint32', index=47,
+      number=79, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sint64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_sint64', index=48,
+      number=80, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_fixed32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_fixed32', index=49,
+      number=81, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_fixed64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_fixed64', index=50,
+      number=82, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sfixed32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_sfixed32', index=51,
+      number=83, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sfixed64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_sfixed64', index=52,
+      number=84, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_float', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_float', index=53,
+      number=85, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_double', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_double', index=54,
+      number=86, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_bool', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_bool', index=55,
+      number=87, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_nested_enum', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.packed_nested_enum', index=56,
+      number=88, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=89, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_int64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.unpacked_int64', index=58,
+      number=90, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_uint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.unpacked_uint32', index=59,
+      number=91, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_uint64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.unpacked_uint64', index=60,
+      number=92, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=93, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=94, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=95, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_fixed64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.unpacked_fixed64', index=64,
+      number=96, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=97, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_sfixed64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.unpacked_sfixed64', index=66,
+      number=98, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_float', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.unpacked_float', index=67,
+      number=99, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_double', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.unpacked_double', index=68,
+      number=100, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_bool', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.unpacked_bool', index=69,
+      number=101, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_nested_enum', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.unpacked_nested_enum', index=70,
+      number=102, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_int32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_int32_int32', index=71,
+      number=56, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int64_int64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_int64_int64', index=72,
+      number=57, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_uint32_uint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_uint32_uint32', index=73,
+      number=58, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_uint64_uint64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_uint64_uint64', index=74,
+      number=59, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sint32_sint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_sint32_sint32', index=75,
+      number=60, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sint64_sint64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_sint64_sint64', index=76,
+      number=61, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_fixed32_fixed32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_fixed32_fixed32', index=77,
+      number=62, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_fixed64_fixed64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_fixed64_fixed64', index=78,
+      number=63, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sfixed32_sfixed32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_sfixed32_sfixed32', index=79,
+      number=64, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sfixed64_sfixed64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_sfixed64_sfixed64', index=80,
+      number=65, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_float', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_int32_float', index=81,
+      number=66, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_double', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_int32_double', index=82,
+      number=67, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_bool_bool', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_bool_bool', index=83,
+      number=68, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_string', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_string_string', index=84,
+      number=69, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_bytes', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_string_bytes', index=85,
+      number=70, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_nested_message', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_string_nested_message', index=86,
+      number=71, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_foreign_message', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_string_foreign_message', index=87,
+      number=72, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_nested_enum', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_string_nested_enum', index=88,
+      number=73, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_foreign_enum', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.map_string_foreign_enum', index=89,
+      number=74, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_uint32', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.oneof_uint32', index=90,
+      number=111, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_nested_message', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.oneof_nested_message', index=91,
+      number=112, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_string', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.oneof_string', index=92,
+      number=113, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_bytes', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.oneof_bytes', index=93,
+      number=114, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_bool', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.oneof_bool', index=94,
+      number=115, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_uint64', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.oneof_uint64', index=95,
+      number=116, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_float', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.oneof_float', index=96,
+      number=117, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_double', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.oneof_double', index=97,
+      number=118, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_enum', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.oneof_enum', index=98,
+      number=119, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='data', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.data', index=99,
+      number=201, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='fieldname1', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.fieldname1', index=100,
+      number=401, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field_name2', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.field_name2', index=101,
+      number=402, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='_field_name3', full_name='protobuf_test_messages.proto2.TestAllTypesProto2._field_name3', index=102,
+      number=403, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field__name4_', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.field__name4_', index=103,
+      number=404, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field0name5', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.field0name5', index=104,
+      number=405, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field_0_name6', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.field_0_name6', index=105,
+      number=406, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='fieldName7', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.fieldName7', index=106,
+      number=407, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='FieldName8', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.FieldName8', index=107,
+      number=408, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field_Name9', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.field_Name9', index=108,
+      number=409, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='Field_Name10', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.Field_Name10', index=109,
+      number=410, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='FIELD_NAME11', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.FIELD_NAME11', index=110,
+      number=411, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='FIELD_name12', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.FIELD_name12', index=111,
+      number=412, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=413, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=414, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=415, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=416, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field_name17__', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.field_name17__', index=116,
+      number=417, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='Field_name18__', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.Field_name18__', index=117,
+      number=418, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTALLTYPESPROTO2_NESTEDMESSAGE, _TESTALLTYPESPROTO2_MAPINT32INT32ENTRY, _TESTALLTYPESPROTO2_MAPINT64INT64ENTRY, _TESTALLTYPESPROTO2_MAPUINT32UINT32ENTRY, _TESTALLTYPESPROTO2_MAPUINT64UINT64ENTRY, _TESTALLTYPESPROTO2_MAPSINT32SINT32ENTRY, _TESTALLTYPESPROTO2_MAPSINT64SINT64ENTRY, _TESTALLTYPESPROTO2_MAPFIXED32FIXED32ENTRY, _TESTALLTYPESPROTO2_MAPFIXED64FIXED64ENTRY, _TESTALLTYPESPROTO2_MAPSFIXED32SFIXED32ENTRY, _TESTALLTYPESPROTO2_MAPSFIXED64SFIXED64ENTRY, _TESTALLTYPESPROTO2_MAPINT32FLOATENTRY, _TESTALLTYPESPROTO2_MAPINT32DOUBLEENTRY, _TESTALLTYPESPROTO2_MAPBOOLBOOLENTRY, _TESTALLTYPESPROTO2_MAPSTRINGSTRINGENTRY, _TESTALLTYPESPROTO2_MAPSTRINGBYTESENTRY, _TESTALLTYPESPROTO2_MAPSTRINGNESTEDMESSAGEENTRY, _TESTALLTYPESPROTO2_MAPSTRINGFOREIGNMESSAGEENTRY, _TESTALLTYPESPROTO2_MAPSTRINGNESTEDENUMENTRY, _TESTALLTYPESPROTO2_MAPSTRINGFOREIGNENUMENTRY, _TESTALLTYPESPROTO2_DATA, _TESTALLTYPESPROTO2_MESSAGESETCORRECT, _TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION1, _TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION2, ],
+  enum_types=[
+    _TESTALLTYPESPROTO2_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(120, 201), ],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='oneof_field', full_name='protobuf_test_messages.proto2.TestAllTypesProto2.oneof_field',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=78,
+  serialized_end=7500,
+)
+
+
+_FOREIGNMESSAGEPROTO2 = _descriptor.Descriptor(
+  name='ForeignMessageProto2',
+  full_name='protobuf_test_messages.proto2.ForeignMessageProto2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='c', full_name='protobuf_test_messages.proto2.ForeignMessageProto2.c', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7502,
+  serialized_end=7535,
+)
+
+
+_UNKNOWNTOTESTALLTYPES_OPTIONALGROUP = _descriptor.Descriptor(
+  name='OptionalGroup',
+  full_name='protobuf_test_messages.proto2.UnknownToTestAllTypes.OptionalGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_test_messages.proto2.UnknownToTestAllTypes.OptionalGroup.a', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7833,
+  serialized_end=7859,
+)
+
+_UNKNOWNTOTESTALLTYPES = _descriptor.Descriptor(
+  name='UnknownToTestAllTypes',
+  full_name='protobuf_test_messages.proto2.UnknownToTestAllTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='protobuf_test_messages.proto2.UnknownToTestAllTypes.optional_int32', index=0,
+      number=1001, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string', full_name='protobuf_test_messages.proto2.UnknownToTestAllTypes.optional_string', index=1,
+      number=1002, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_message', full_name='protobuf_test_messages.proto2.UnknownToTestAllTypes.nested_message', index=2,
+      number=1003, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optionalgroup', full_name='protobuf_test_messages.proto2.UnknownToTestAllTypes.optionalgroup', index=3,
+      number=1004, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bool', full_name='protobuf_test_messages.proto2.UnknownToTestAllTypes.optional_bool', index=4,
+      number=1006, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int32', full_name='protobuf_test_messages.proto2.UnknownToTestAllTypes.repeated_int32', index=5,
+      number=1011, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_UNKNOWNTOTESTALLTYPES_OPTIONALGROUP, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7538,
+  serialized_end=7859,
+)
+
+_TESTALLTYPESPROTO2_NESTEDMESSAGE.fields_by_name['corecursive'].message_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_NESTEDMESSAGE.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPINT32INT32ENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPINT64INT64ENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPUINT32UINT32ENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPUINT64UINT64ENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPSINT32SINT32ENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPSINT64SINT64ENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPFIXED32FIXED32ENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPFIXED64FIXED64ENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPSFIXED32SFIXED32ENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPSFIXED64SFIXED64ENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPINT32FLOATENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPINT32DOUBLEENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPBOOLBOOLENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPSTRINGSTRINGENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPSTRINGBYTESENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPSTRINGNESTEDMESSAGEENTRY.fields_by_name['value'].message_type = _TESTALLTYPESPROTO2_NESTEDMESSAGE
+_TESTALLTYPESPROTO2_MAPSTRINGNESTEDMESSAGEENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPSTRINGFOREIGNMESSAGEENTRY.fields_by_name['value'].message_type = _FOREIGNMESSAGEPROTO2
+_TESTALLTYPESPROTO2_MAPSTRINGFOREIGNMESSAGEENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPSTRINGNESTEDENUMENTRY.fields_by_name['value'].enum_type = _TESTALLTYPESPROTO2_NESTEDENUM
+_TESTALLTYPESPROTO2_MAPSTRINGNESTEDENUMENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MAPSTRINGFOREIGNENUMENTRY.fields_by_name['value'].enum_type = _FOREIGNENUMPROTO2
+_TESTALLTYPESPROTO2_MAPSTRINGFOREIGNENUMENTRY.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_DATA.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MESSAGESETCORRECT.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION1.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION2.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2.fields_by_name['optional_nested_message'].message_type = _TESTALLTYPESPROTO2_NESTEDMESSAGE
+_TESTALLTYPESPROTO2.fields_by_name['optional_foreign_message'].message_type = _FOREIGNMESSAGEPROTO2
+_TESTALLTYPESPROTO2.fields_by_name['optional_nested_enum'].enum_type = _TESTALLTYPESPROTO2_NESTEDENUM
+_TESTALLTYPESPROTO2.fields_by_name['optional_foreign_enum'].enum_type = _FOREIGNENUMPROTO2
+_TESTALLTYPESPROTO2.fields_by_name['recursive_message'].message_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2.fields_by_name['repeated_nested_message'].message_type = _TESTALLTYPESPROTO2_NESTEDMESSAGE
+_TESTALLTYPESPROTO2.fields_by_name['repeated_foreign_message'].message_type = _FOREIGNMESSAGEPROTO2
+_TESTALLTYPESPROTO2.fields_by_name['repeated_nested_enum'].enum_type = _TESTALLTYPESPROTO2_NESTEDENUM
+_TESTALLTYPESPROTO2.fields_by_name['repeated_foreign_enum'].enum_type = _FOREIGNENUMPROTO2
+_TESTALLTYPESPROTO2.fields_by_name['packed_nested_enum'].enum_type = _TESTALLTYPESPROTO2_NESTEDENUM
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_nested_enum'].enum_type = _TESTALLTYPESPROTO2_NESTEDENUM
+_TESTALLTYPESPROTO2.fields_by_name['map_int32_int32'].message_type = _TESTALLTYPESPROTO2_MAPINT32INT32ENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_int64_int64'].message_type = _TESTALLTYPESPROTO2_MAPINT64INT64ENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_uint32_uint32'].message_type = _TESTALLTYPESPROTO2_MAPUINT32UINT32ENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_uint64_uint64'].message_type = _TESTALLTYPESPROTO2_MAPUINT64UINT64ENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_sint32_sint32'].message_type = _TESTALLTYPESPROTO2_MAPSINT32SINT32ENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_sint64_sint64'].message_type = _TESTALLTYPESPROTO2_MAPSINT64SINT64ENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_fixed32_fixed32'].message_type = _TESTALLTYPESPROTO2_MAPFIXED32FIXED32ENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_fixed64_fixed64'].message_type = _TESTALLTYPESPROTO2_MAPFIXED64FIXED64ENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_sfixed32_sfixed32'].message_type = _TESTALLTYPESPROTO2_MAPSFIXED32SFIXED32ENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_sfixed64_sfixed64'].message_type = _TESTALLTYPESPROTO2_MAPSFIXED64SFIXED64ENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_int32_float'].message_type = _TESTALLTYPESPROTO2_MAPINT32FLOATENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_int32_double'].message_type = _TESTALLTYPESPROTO2_MAPINT32DOUBLEENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_bool_bool'].message_type = _TESTALLTYPESPROTO2_MAPBOOLBOOLENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_string_string'].message_type = _TESTALLTYPESPROTO2_MAPSTRINGSTRINGENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_string_bytes'].message_type = _TESTALLTYPESPROTO2_MAPSTRINGBYTESENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_string_nested_message'].message_type = _TESTALLTYPESPROTO2_MAPSTRINGNESTEDMESSAGEENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_string_foreign_message'].message_type = _TESTALLTYPESPROTO2_MAPSTRINGFOREIGNMESSAGEENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_string_nested_enum'].message_type = _TESTALLTYPESPROTO2_MAPSTRINGNESTEDENUMENTRY
+_TESTALLTYPESPROTO2.fields_by_name['map_string_foreign_enum'].message_type = _TESTALLTYPESPROTO2_MAPSTRINGFOREIGNENUMENTRY
+_TESTALLTYPESPROTO2.fields_by_name['oneof_nested_message'].message_type = _TESTALLTYPESPROTO2_NESTEDMESSAGE
+_TESTALLTYPESPROTO2.fields_by_name['oneof_enum'].enum_type = _TESTALLTYPESPROTO2_NESTEDENUM
+_TESTALLTYPESPROTO2.fields_by_name['data'].message_type = _TESTALLTYPESPROTO2_DATA
+_TESTALLTYPESPROTO2_NESTEDENUM.containing_type = _TESTALLTYPESPROTO2
+_TESTALLTYPESPROTO2.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO2.fields_by_name['oneof_uint32'])
+_TESTALLTYPESPROTO2.fields_by_name['oneof_uint32'].containing_oneof = _TESTALLTYPESPROTO2.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO2.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO2.fields_by_name['oneof_nested_message'])
+_TESTALLTYPESPROTO2.fields_by_name['oneof_nested_message'].containing_oneof = _TESTALLTYPESPROTO2.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO2.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO2.fields_by_name['oneof_string'])
+_TESTALLTYPESPROTO2.fields_by_name['oneof_string'].containing_oneof = _TESTALLTYPESPROTO2.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO2.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO2.fields_by_name['oneof_bytes'])
+_TESTALLTYPESPROTO2.fields_by_name['oneof_bytes'].containing_oneof = _TESTALLTYPESPROTO2.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO2.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO2.fields_by_name['oneof_bool'])
+_TESTALLTYPESPROTO2.fields_by_name['oneof_bool'].containing_oneof = _TESTALLTYPESPROTO2.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO2.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO2.fields_by_name['oneof_uint64'])
+_TESTALLTYPESPROTO2.fields_by_name['oneof_uint64'].containing_oneof = _TESTALLTYPESPROTO2.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO2.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO2.fields_by_name['oneof_float'])
+_TESTALLTYPESPROTO2.fields_by_name['oneof_float'].containing_oneof = _TESTALLTYPESPROTO2.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO2.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO2.fields_by_name['oneof_double'])
+_TESTALLTYPESPROTO2.fields_by_name['oneof_double'].containing_oneof = _TESTALLTYPESPROTO2.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO2.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO2.fields_by_name['oneof_enum'])
+_TESTALLTYPESPROTO2.fields_by_name['oneof_enum'].containing_oneof = _TESTALLTYPESPROTO2.oneofs_by_name['oneof_field']
+_UNKNOWNTOTESTALLTYPES_OPTIONALGROUP.containing_type = _UNKNOWNTOTESTALLTYPES
+_UNKNOWNTOTESTALLTYPES.fields_by_name['nested_message'].message_type = _FOREIGNMESSAGEPROTO2
+_UNKNOWNTOTESTALLTYPES.fields_by_name['optionalgroup'].message_type = _UNKNOWNTOTESTALLTYPES_OPTIONALGROUP
+DESCRIPTOR.message_types_by_name['TestAllTypesProto2'] = _TESTALLTYPESPROTO2
+DESCRIPTOR.message_types_by_name['ForeignMessageProto2'] = _FOREIGNMESSAGEPROTO2
+DESCRIPTOR.message_types_by_name['UnknownToTestAllTypes'] = _UNKNOWNTOTESTALLTYPES
+DESCRIPTOR.enum_types_by_name['ForeignEnumProto2'] = _FOREIGNENUMPROTO2
+DESCRIPTOR.extensions_by_name['extension_int32'] = extension_int32
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestAllTypesProto2 = _reflection.GeneratedProtocolMessageType('TestAllTypesProto2', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.NestedMessage)
+    })
+  ,
+
+  'MapInt32Int32Entry' : _reflection.GeneratedProtocolMessageType('MapInt32Int32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPINT32INT32ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32Int32Entry)
+    })
+  ,
+
+  'MapInt64Int64Entry' : _reflection.GeneratedProtocolMessageType('MapInt64Int64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPINT64INT64ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapInt64Int64Entry)
+    })
+  ,
+
+  'MapUint32Uint32Entry' : _reflection.GeneratedProtocolMessageType('MapUint32Uint32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPUINT32UINT32ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapUint32Uint32Entry)
+    })
+  ,
+
+  'MapUint64Uint64Entry' : _reflection.GeneratedProtocolMessageType('MapUint64Uint64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPUINT64UINT64ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapUint64Uint64Entry)
+    })
+  ,
+
+  'MapSint32Sint32Entry' : _reflection.GeneratedProtocolMessageType('MapSint32Sint32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPSINT32SINT32ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapSint32Sint32Entry)
+    })
+  ,
+
+  'MapSint64Sint64Entry' : _reflection.GeneratedProtocolMessageType('MapSint64Sint64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPSINT64SINT64ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapSint64Sint64Entry)
+    })
+  ,
+
+  'MapFixed32Fixed32Entry' : _reflection.GeneratedProtocolMessageType('MapFixed32Fixed32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPFIXED32FIXED32ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapFixed32Fixed32Entry)
+    })
+  ,
+
+  'MapFixed64Fixed64Entry' : _reflection.GeneratedProtocolMessageType('MapFixed64Fixed64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPFIXED64FIXED64ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapFixed64Fixed64Entry)
+    })
+  ,
+
+  'MapSfixed32Sfixed32Entry' : _reflection.GeneratedProtocolMessageType('MapSfixed32Sfixed32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPSFIXED32SFIXED32ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapSfixed32Sfixed32Entry)
+    })
+  ,
+
+  'MapSfixed64Sfixed64Entry' : _reflection.GeneratedProtocolMessageType('MapSfixed64Sfixed64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPSFIXED64SFIXED64ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapSfixed64Sfixed64Entry)
+    })
+  ,
+
+  'MapInt32FloatEntry' : _reflection.GeneratedProtocolMessageType('MapInt32FloatEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPINT32FLOATENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32FloatEntry)
+    })
+  ,
+
+  'MapInt32DoubleEntry' : _reflection.GeneratedProtocolMessageType('MapInt32DoubleEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPINT32DOUBLEENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapInt32DoubleEntry)
+    })
+  ,
+
+  'MapBoolBoolEntry' : _reflection.GeneratedProtocolMessageType('MapBoolBoolEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPBOOLBOOLENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapBoolBoolEntry)
+    })
+  ,
+
+  'MapStringStringEntry' : _reflection.GeneratedProtocolMessageType('MapStringStringEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPSTRINGSTRINGENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapStringStringEntry)
+    })
+  ,
+
+  'MapStringBytesEntry' : _reflection.GeneratedProtocolMessageType('MapStringBytesEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPSTRINGBYTESENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapStringBytesEntry)
+    })
+  ,
+
+  'MapStringNestedMessageEntry' : _reflection.GeneratedProtocolMessageType('MapStringNestedMessageEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPSTRINGNESTEDMESSAGEENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapStringNestedMessageEntry)
+    })
+  ,
+
+  'MapStringForeignMessageEntry' : _reflection.GeneratedProtocolMessageType('MapStringForeignMessageEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPSTRINGFOREIGNMESSAGEENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapStringForeignMessageEntry)
+    })
+  ,
+
+  'MapStringNestedEnumEntry' : _reflection.GeneratedProtocolMessageType('MapStringNestedEnumEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPSTRINGNESTEDENUMENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapStringNestedEnumEntry)
+    })
+  ,
+
+  'MapStringForeignEnumEntry' : _reflection.GeneratedProtocolMessageType('MapStringForeignEnumEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MAPSTRINGFOREIGNENUMENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MapStringForeignEnumEntry)
+    })
+  ,
+
+  'Data' : _reflection.GeneratedProtocolMessageType('Data', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_DATA,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.Data)
+    })
+  ,
+
+  'MessageSetCorrect' : _reflection.GeneratedProtocolMessageType('MessageSetCorrect', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MESSAGESETCORRECT,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MessageSetCorrect)
+    })
+  ,
+
+  'MessageSetCorrectExtension1' : _reflection.GeneratedProtocolMessageType('MessageSetCorrectExtension1', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION1,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MessageSetCorrectExtension1)
+    })
+  ,
+
+  'MessageSetCorrectExtension2' : _reflection.GeneratedProtocolMessageType('MessageSetCorrectExtension2', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION2,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2.MessageSetCorrectExtension2)
+    })
+  ,
+  'DESCRIPTOR' : _TESTALLTYPESPROTO2,
+  '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.TestAllTypesProto2)
+  })
+_sym_db.RegisterMessage(TestAllTypesProto2)
+_sym_db.RegisterMessage(TestAllTypesProto2.NestedMessage)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapInt32Int32Entry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapInt64Int64Entry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapUint32Uint32Entry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapUint64Uint64Entry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapSint32Sint32Entry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapSint64Sint64Entry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapFixed32Fixed32Entry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapFixed64Fixed64Entry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapSfixed32Sfixed32Entry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapSfixed64Sfixed64Entry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapInt32FloatEntry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapInt32DoubleEntry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapBoolBoolEntry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapStringStringEntry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapStringBytesEntry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapStringNestedMessageEntry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapStringForeignMessageEntry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapStringNestedEnumEntry)
+_sym_db.RegisterMessage(TestAllTypesProto2.MapStringForeignEnumEntry)
+_sym_db.RegisterMessage(TestAllTypesProto2.Data)
+_sym_db.RegisterMessage(TestAllTypesProto2.MessageSetCorrect)
+_sym_db.RegisterMessage(TestAllTypesProto2.MessageSetCorrectExtension1)
+_sym_db.RegisterMessage(TestAllTypesProto2.MessageSetCorrectExtension2)
+
+ForeignMessageProto2 = _reflection.GeneratedProtocolMessageType('ForeignMessageProto2', (_message.Message,), {
+  'DESCRIPTOR' : _FOREIGNMESSAGEPROTO2,
+  '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.ForeignMessageProto2)
+  })
+_sym_db.RegisterMessage(ForeignMessageProto2)
+
+UnknownToTestAllTypes = _reflection.GeneratedProtocolMessageType('UnknownToTestAllTypes', (_message.Message,), {
+
+  'OptionalGroup' : _reflection.GeneratedProtocolMessageType('OptionalGroup', (_message.Message,), {
+    'DESCRIPTOR' : _UNKNOWNTOTESTALLTYPES_OPTIONALGROUP,
+    '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.UnknownToTestAllTypes.OptionalGroup)
+    })
+  ,
+  'DESCRIPTOR' : _UNKNOWNTOTESTALLTYPES,
+  '__module__' : 'google.protobuf.test_messages_proto2_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto2.UnknownToTestAllTypes)
+  })
+_sym_db.RegisterMessage(UnknownToTestAllTypes)
+_sym_db.RegisterMessage(UnknownToTestAllTypes.OptionalGroup)
+
+TestAllTypesProto2.RegisterExtension(extension_int32)
+_TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION1.extensions_by_name['message_set_extension'].message_type = _TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION1
+TestAllTypesProto2.MessageSetCorrect.RegisterExtension(_TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION1.extensions_by_name['message_set_extension'])
+_TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION2.extensions_by_name['message_set_extension'].message_type = _TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION2
+TestAllTypesProto2.MessageSetCorrect.RegisterExtension(_TESTALLTYPESPROTO2_MESSAGESETCORRECTEXTENSION2.extensions_by_name['message_set_extension'])
+
+DESCRIPTOR._options = None
+_TESTALLTYPESPROTO2_MAPINT32INT32ENTRY._options = None
+_TESTALLTYPESPROTO2_MAPINT64INT64ENTRY._options = None
+_TESTALLTYPESPROTO2_MAPUINT32UINT32ENTRY._options = None
+_TESTALLTYPESPROTO2_MAPUINT64UINT64ENTRY._options = None
+_TESTALLTYPESPROTO2_MAPSINT32SINT32ENTRY._options = None
+_TESTALLTYPESPROTO2_MAPSINT64SINT64ENTRY._options = None
+_TESTALLTYPESPROTO2_MAPFIXED32FIXED32ENTRY._options = None
+_TESTALLTYPESPROTO2_MAPFIXED64FIXED64ENTRY._options = None
+_TESTALLTYPESPROTO2_MAPSFIXED32SFIXED32ENTRY._options = None
+_TESTALLTYPESPROTO2_MAPSFIXED64SFIXED64ENTRY._options = None
+_TESTALLTYPESPROTO2_MAPINT32FLOATENTRY._options = None
+_TESTALLTYPESPROTO2_MAPINT32DOUBLEENTRY._options = None
+_TESTALLTYPESPROTO2_MAPBOOLBOOLENTRY._options = None
+_TESTALLTYPESPROTO2_MAPSTRINGSTRINGENTRY._options = None
+_TESTALLTYPESPROTO2_MAPSTRINGBYTESENTRY._options = None
+_TESTALLTYPESPROTO2_MAPSTRINGNESTEDMESSAGEENTRY._options = None
+_TESTALLTYPESPROTO2_MAPSTRINGFOREIGNMESSAGEENTRY._options = None
+_TESTALLTYPESPROTO2_MAPSTRINGNESTEDENUMENTRY._options = None
+_TESTALLTYPESPROTO2_MAPSTRINGFOREIGNENUMENTRY._options = None
+_TESTALLTYPESPROTO2_MESSAGESETCORRECT._options = None
+_TESTALLTYPESPROTO2.fields_by_name['optional_string_piece']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['optional_cord']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['repeated_string_piece']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['repeated_cord']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_int32']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_int64']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_uint32']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_uint64']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_sint32']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_sint64']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_fixed32']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_fixed64']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_sfixed32']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_sfixed64']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_float']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_double']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_bool']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['packed_nested_enum']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_int32']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_int64']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_uint32']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_uint64']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_sint32']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_sint64']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_fixed32']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_fixed64']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_sfixed32']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_sfixed64']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_float']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_double']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_bool']._options = None
+_TESTALLTYPESPROTO2.fields_by_name['unpacked_nested_enum']._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/test_messages_proto3_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/test_messages_proto3_pb2.py
new file mode 100644
index 0000000..42b728a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/test_messages_proto3_pb2.py
@@ -0,0 +1,2367 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/test_messages_proto3.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import any_pb2 as google_dot_protobuf_dot_any__pb2
+from google.protobuf import duration_pb2 as google_dot_protobuf_dot_duration__pb2
+from google.protobuf import field_mask_pb2 as google_dot_protobuf_dot_field__mask__pb2
+from google.protobuf import struct_pb2 as google_dot_protobuf_dot_struct__pb2
+from google.protobuf import timestamp_pb2 as google_dot_protobuf_dot_timestamp__pb2
+from google.protobuf import wrappers_pb2 as google_dot_protobuf_dot_wrappers__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/test_messages_proto3.proto',
+  package='protobuf_test_messages.proto3',
+  syntax='proto3',
+  serialized_options=b'\n(com.google.protobuf_test_messages.proto3H\001\370\001\001\242\002\006Proto3',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n*google/protobuf/test_messages_proto3.proto\x12\x1dprotobuf_test_messages.proto3\x1a\x19google/protobuf/any.proto\x1a\x1egoogle/protobuf/duration.proto\x1a google/protobuf/field_mask.proto\x1a\x1cgoogle/protobuf/struct.proto\x1a\x1fgoogle/protobuf/timestamp.proto\x1a\x1egoogle/protobuf/wrappers.proto\"\xbf\x44\n\x12TestAllTypesProto3\x12\x16\n\x0eoptional_int32\x18\x01 \x01(\x05\x12\x16\n\x0eoptional_int64\x18\x02 \x01(\x03\x12\x17\n\x0foptional_uint32\x18\x03 \x01(\r\x12\x17\n\x0foptional_uint64\x18\x04 \x01(\x04\x12\x17\n\x0foptional_sint32\x18\x05 \x01(\x11\x12\x17\n\x0foptional_sint64\x18\x06 \x01(\x12\x12\x18\n\x10optional_fixed32\x18\x07 \x01(\x07\x12\x18\n\x10optional_fixed64\x18\x08 \x01(\x06\x12\x19\n\x11optional_sfixed32\x18\t \x01(\x0f\x12\x19\n\x11optional_sfixed64\x18\n \x01(\x10\x12\x16\n\x0eoptional_float\x18\x0b \x01(\x02\x12\x17\n\x0foptional_double\x18\x0c \x01(\x01\x12\x15\n\roptional_bool\x18\r \x01(\x08\x12\x17\n\x0foptional_string\x18\x0e 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+  ,
+  dependencies=[google_dot_protobuf_dot_any__pb2.DESCRIPTOR,google_dot_protobuf_dot_duration__pb2.DESCRIPTOR,google_dot_protobuf_dot_field__mask__pb2.DESCRIPTOR,google_dot_protobuf_dot_struct__pb2.DESCRIPTOR,google_dot_protobuf_dot_timestamp__pb2.DESCRIPTOR,google_dot_protobuf_dot_wrappers__pb2.DESCRIPTOR,])
+
+_FOREIGNENUM = _descriptor.EnumDescriptor(
+  name='ForeignEnum',
+  full_name='protobuf_test_messages.proto3.ForeignEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_BAR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_BAZ', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=9064,
+  serialized_end=9128,
+)
+_sym_db.RegisterEnumDescriptor(_FOREIGNENUM)
+
+ForeignEnum = enum_type_wrapper.EnumTypeWrapper(_FOREIGNENUM)
+FOREIGN_FOO = 0
+FOREIGN_BAR = 1
+FOREIGN_BAZ = 2
+
+
+_TESTALLTYPESPROTO3_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAZ', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='NEG', index=3, number=-1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=8862,
+  serialized_end=8919,
+)
+_sym_db.RegisterEnumDescriptor(_TESTALLTYPESPROTO3_NESTEDENUM)
+
+_TESTALLTYPESPROTO3_ALIASEDENUM = _descriptor.EnumDescriptor(
+  name='AliasedEnum',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.AliasedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='ALIAS_FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ALIAS_BAR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ALIAS_BAZ', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='QUX', index=3, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='qux', index=4, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='bAz', index=5, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=b'\020\001',
+  serialized_start=8921,
+  serialized_end=9010,
+)
+_sym_db.RegisterEnumDescriptor(_TESTALLTYPESPROTO3_ALIASEDENUM)
+
+
+_TESTALLTYPESPROTO3_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.NestedMessage.a', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='corecursive', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.NestedMessage.corecursive', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7456,
+  serialized_end=7554,
+)
+
+_TESTALLTYPESPROTO3_MAPINT32INT32ENTRY = _descriptor.Descriptor(
+  name='MapInt32Int32Entry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32Int32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32Int32Entry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32Int32Entry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7556,
+  serialized_end=7608,
+)
+
+_TESTALLTYPESPROTO3_MAPINT64INT64ENTRY = _descriptor.Descriptor(
+  name='MapInt64Int64Entry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt64Int64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt64Int64Entry.key', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt64Int64Entry.value', index=1,
+      number=2, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7610,
+  serialized_end=7662,
+)
+
+_TESTALLTYPESPROTO3_MAPUINT32UINT32ENTRY = _descriptor.Descriptor(
+  name='MapUint32Uint32Entry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapUint32Uint32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapUint32Uint32Entry.key', index=0,
+      number=1, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapUint32Uint32Entry.value', index=1,
+      number=2, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7664,
+  serialized_end=7718,
+)
+
+_TESTALLTYPESPROTO3_MAPUINT64UINT64ENTRY = _descriptor.Descriptor(
+  name='MapUint64Uint64Entry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapUint64Uint64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapUint64Uint64Entry.key', index=0,
+      number=1, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapUint64Uint64Entry.value', index=1,
+      number=2, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7720,
+  serialized_end=7774,
+)
+
+_TESTALLTYPESPROTO3_MAPSINT32SINT32ENTRY = _descriptor.Descriptor(
+  name='MapSint32Sint32Entry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSint32Sint32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSint32Sint32Entry.key', index=0,
+      number=1, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSint32Sint32Entry.value', index=1,
+      number=2, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7776,
+  serialized_end=7830,
+)
+
+_TESTALLTYPESPROTO3_MAPSINT64SINT64ENTRY = _descriptor.Descriptor(
+  name='MapSint64Sint64Entry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSint64Sint64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSint64Sint64Entry.key', index=0,
+      number=1, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSint64Sint64Entry.value', index=1,
+      number=2, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7832,
+  serialized_end=7886,
+)
+
+_TESTALLTYPESPROTO3_MAPFIXED32FIXED32ENTRY = _descriptor.Descriptor(
+  name='MapFixed32Fixed32Entry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapFixed32Fixed32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapFixed32Fixed32Entry.key', index=0,
+      number=1, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapFixed32Fixed32Entry.value', index=1,
+      number=2, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7888,
+  serialized_end=7944,
+)
+
+_TESTALLTYPESPROTO3_MAPFIXED64FIXED64ENTRY = _descriptor.Descriptor(
+  name='MapFixed64Fixed64Entry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapFixed64Fixed64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapFixed64Fixed64Entry.key', index=0,
+      number=1, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapFixed64Fixed64Entry.value', index=1,
+      number=2, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7946,
+  serialized_end=8002,
+)
+
+_TESTALLTYPESPROTO3_MAPSFIXED32SFIXED32ENTRY = _descriptor.Descriptor(
+  name='MapSfixed32Sfixed32Entry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSfixed32Sfixed32Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSfixed32Sfixed32Entry.key', index=0,
+      number=1, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSfixed32Sfixed32Entry.value', index=1,
+      number=2, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8004,
+  serialized_end=8062,
+)
+
+_TESTALLTYPESPROTO3_MAPSFIXED64SFIXED64ENTRY = _descriptor.Descriptor(
+  name='MapSfixed64Sfixed64Entry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSfixed64Sfixed64Entry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSfixed64Sfixed64Entry.key', index=0,
+      number=1, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapSfixed64Sfixed64Entry.value', index=1,
+      number=2, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8064,
+  serialized_end=8122,
+)
+
+_TESTALLTYPESPROTO3_MAPINT32FLOATENTRY = _descriptor.Descriptor(
+  name='MapInt32FloatEntry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32FloatEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32FloatEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32FloatEntry.value', index=1,
+      number=2, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8124,
+  serialized_end=8176,
+)
+
+_TESTALLTYPESPROTO3_MAPINT32DOUBLEENTRY = _descriptor.Descriptor(
+  name='MapInt32DoubleEntry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32DoubleEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32DoubleEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32DoubleEntry.value', index=1,
+      number=2, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8178,
+  serialized_end=8231,
+)
+
+_TESTALLTYPESPROTO3_MAPBOOLBOOLENTRY = _descriptor.Descriptor(
+  name='MapBoolBoolEntry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapBoolBoolEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapBoolBoolEntry.key', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapBoolBoolEntry.value', index=1,
+      number=2, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8233,
+  serialized_end=8283,
+)
+
+_TESTALLTYPESPROTO3_MAPSTRINGSTRINGENTRY = _descriptor.Descriptor(
+  name='MapStringStringEntry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringStringEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringStringEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringStringEntry.value', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8285,
+  serialized_end=8339,
+)
+
+_TESTALLTYPESPROTO3_MAPSTRINGBYTESENTRY = _descriptor.Descriptor(
+  name='MapStringBytesEntry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringBytesEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringBytesEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringBytesEntry.value', index=1,
+      number=2, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8341,
+  serialized_end=8394,
+)
+
+_TESTALLTYPESPROTO3_MAPSTRINGNESTEDMESSAGEENTRY = _descriptor.Descriptor(
+  name='MapStringNestedMessageEntry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringNestedMessageEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringNestedMessageEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringNestedMessageEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8396,
+  serialized_end=8522,
+)
+
+_TESTALLTYPESPROTO3_MAPSTRINGFOREIGNMESSAGEENTRY = _descriptor.Descriptor(
+  name='MapStringForeignMessageEntry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringForeignMessageEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringForeignMessageEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringForeignMessageEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8524,
+  serialized_end=8633,
+)
+
+_TESTALLTYPESPROTO3_MAPSTRINGNESTEDENUMENTRY = _descriptor.Descriptor(
+  name='MapStringNestedEnumEntry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringNestedEnumEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringNestedEnumEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringNestedEnumEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8635,
+  serialized_end=8755,
+)
+
+_TESTALLTYPESPROTO3_MAPSTRINGFOREIGNENUMENTRY = _descriptor.Descriptor(
+  name='MapStringForeignEnumEntry',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringForeignEnumEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringForeignEnumEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.MapStringForeignEnumEntry.value', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8757,
+  serialized_end=8860,
+)
+
+_TESTALLTYPESPROTO3 = _descriptor.Descriptor(
+  name='TestAllTypesProto3',
+  full_name='protobuf_test_messages.proto3.TestAllTypesProto3',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_int32', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_int64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_int64', index=1,
+      number=2, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_uint32', index=2,
+      number=3, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_uint64', index=3,
+      number=4, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sint32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_sint32', index=4,
+      number=5, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_sint64', index=5,
+      number=6, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_fixed32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_fixed32', index=6,
+      number=7, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_fixed64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_fixed64', index=7,
+      number=8, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sfixed32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_sfixed32', index=8,
+      number=9, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sfixed64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_sfixed64', index=9,
+      number=10, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_float', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_float', index=10,
+      number=11, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_double', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_double', index=11,
+      number=12, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bool', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_bool', index=12,
+      number=13, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_string', index=13,
+      number=14, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bytes', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_bytes', index=14,
+      number=15, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_message', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_nested_message', index=15,
+      number=18, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_foreign_message', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_foreign_message', index=16,
+      number=19, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_enum', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_nested_enum', index=17,
+      number=21, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_foreign_enum', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_foreign_enum', index=18,
+      number=22, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_aliased_enum', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_aliased_enum', index=19,
+      number=23, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string_piece', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_string_piece', index=20,
+      number=24, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_cord', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_cord', index=21,
+      number=25, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='recursive_message', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.recursive_message', index=22,
+      number=27, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_int32', index=23,
+      number=31, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_int64', index=24,
+      number=32, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_uint32', index=25,
+      number=33, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_uint64', index=26,
+      number=34, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_sint32', index=27,
+      number=35, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_sint64', index=28,
+      number=36, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_fixed32', index=29,
+      number=37, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_fixed64', index=30,
+      number=38, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_sfixed32', index=31,
+      number=39, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_sfixed64', index=32,
+      number=40, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_float', index=33,
+      number=41, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_double', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_double', index=34,
+      number=42, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bool', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_bool', index=35,
+      number=43, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_string', index=36,
+      number=44, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bytes', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_bytes', index=37,
+      number=45, type=12, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_message', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_nested_message', index=38,
+      number=48, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_foreign_message', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_foreign_message', index=39,
+      number=49, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_enum', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_nested_enum', index=40,
+      number=51, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_foreign_enum', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_foreign_enum', index=41,
+      number=52, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string_piece', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_string_piece', index=42,
+      number=54, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_cord', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_cord', index=43,
+      number=55, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=75, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_int64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_int64', index=45,
+      number=76, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_uint32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_uint32', index=46,
+      number=77, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_uint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_uint64', index=47,
+      number=78, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sint32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_sint32', index=48,
+      number=79, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_sint64', index=49,
+      number=80, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_fixed32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_fixed32', index=50,
+      number=81, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_fixed64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_fixed64', index=51,
+      number=82, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sfixed32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_sfixed32', index=52,
+      number=83, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sfixed64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_sfixed64', index=53,
+      number=84, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_float', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_float', index=54,
+      number=85, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_double', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_double', index=55,
+      number=86, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_bool', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_bool', index=56,
+      number=87, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_nested_enum', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.packed_nested_enum', index=57,
+      number=88, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=89, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_int64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_int64', index=59,
+      number=90, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_uint32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_uint32', index=60,
+      number=91, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_uint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_uint64', index=61,
+      number=92, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_sint32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_sint32', index=62,
+      number=93, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_sint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_sint64', index=63,
+      number=94, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=95, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_fixed64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_fixed64', index=65,
+      number=96, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=97, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_sfixed64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_sfixed64', index=67,
+      number=98, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_float', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_float', index=68,
+      number=99, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_double', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_double', index=69,
+      number=100, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_bool', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_bool', index=70,
+      number=101, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_nested_enum', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.unpacked_nested_enum', index=71,
+      number=102, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int32_int32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_int32_int32', index=72,
+      number=56, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_int64_int64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_int64_int64', index=73,
+      number=57, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_uint32_uint32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_uint32_uint32', index=74,
+      number=58, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_uint64_uint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_uint64_uint64', index=75,
+      number=59, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=60, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_sint64_sint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_sint64_sint64', index=77,
+      number=61, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_fixed32_fixed32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_fixed32_fixed32', index=78,
+      number=62, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_fixed64_fixed64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_fixed64_fixed64', index=79,
+      number=63, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=64, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=65, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=66, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=67, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_bool_bool', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_bool_bool', index=84,
+      number=68, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_string', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_string_string', index=85,
+      number=69, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_bytes', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_string_bytes', index=86,
+      number=70, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_nested_message', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_string_nested_message', index=87,
+      number=71, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_foreign_message', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_string_foreign_message', index=88,
+      number=72, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_nested_enum', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_string_nested_enum', index=89,
+      number=73, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_string_foreign_enum', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.map_string_foreign_enum', index=90,
+      number=74, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_uint32', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.oneof_uint32', index=91,
+      number=111, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_nested_message', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.oneof_nested_message', index=92,
+      number=112, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_string', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.oneof_string', index=93,
+      number=113, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_bytes', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.oneof_bytes', index=94,
+      number=114, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_bool', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.oneof_bool', index=95,
+      number=115, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_uint64', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.oneof_uint64', index=96,
+      number=116, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_float', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.oneof_float', index=97,
+      number=117, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_double', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.oneof_double', index=98,
+      number=118, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_enum', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.oneof_enum', index=99,
+      number=119, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bool_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_bool_wrapper', index=100,
+      number=201, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_int32_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_int32_wrapper', index=101,
+      number=202, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_int64_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_int64_wrapper', index=102,
+      number=203, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint32_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_uint32_wrapper', index=103,
+      number=204, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint64_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_uint64_wrapper', index=104,
+      number=205, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_float_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_float_wrapper', index=105,
+      number=206, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_double_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_double_wrapper', index=106,
+      number=207, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_string_wrapper', index=107,
+      number=208, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bytes_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_bytes_wrapper', index=108,
+      number=209, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bool_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_bool_wrapper', index=109,
+      number=211, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int32_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_int32_wrapper', index=110,
+      number=212, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_int64_wrapper', index=111,
+      number=213, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint32_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_uint32_wrapper', index=112,
+      number=214, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint64_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_uint64_wrapper', index=113,
+      number=215, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_float_wrapper', index=114,
+      number=216, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_double_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_double_wrapper', index=115,
+      number=217, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_string_wrapper', index=116,
+      number=218, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bytes_wrapper', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_bytes_wrapper', index=117,
+      number=219, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_duration', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_duration', index=118,
+      number=301, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_timestamp', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_timestamp', index=119,
+      number=302, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_field_mask', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_field_mask', index=120,
+      number=303, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_struct', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_struct', index=121,
+      number=304, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_any', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_any', index=122,
+      number=305, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.optional_value', index=123,
+      number=306, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_duration', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_duration', index=124,
+      number=311, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_timestamp', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_timestamp', index=125,
+      number=312, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fieldmask', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_fieldmask', index=126,
+      number=313, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_struct', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_struct', index=127,
+      number=324, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_any', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_any', index=128,
+      number=315, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_value', index=129,
+      number=316, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_list_value', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.repeated_list_value', index=130,
+      number=317, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='fieldname1', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.fieldname1', index=131,
+      number=401, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field_name2', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.field_name2', index=132,
+      number=402, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='_field_name3', full_name='protobuf_test_messages.proto3.TestAllTypesProto3._field_name3', index=133,
+      number=403, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field__name4_', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.field__name4_', index=134,
+      number=404, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field0name5', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.field0name5', index=135,
+      number=405, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field_0_name6', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.field_0_name6', index=136,
+      number=406, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='fieldName7', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.fieldName7', index=137,
+      number=407, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='FieldName8', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.FieldName8', index=138,
+      number=408, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field_Name9', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.field_Name9', index=139,
+      number=409, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='Field_Name10', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.Field_Name10', index=140,
+      number=410, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='FIELD_NAME11', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.FIELD_NAME11', index=141,
+      number=411, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='FIELD_name12', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.FIELD_name12', index=142,
+      number=412, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='__field_name13', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.__field_name13', index=143,
+      number=413, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='__Field_name14', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.__Field_name14', index=144,
+      number=414, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field__name15', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.field__name15', index=145,
+      number=415, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field__Name16', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.field__Name16', index=146,
+      number=416, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field_name17__', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.field_name17__', index=147,
+      number=417, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='Field_name18__', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.Field_name18__', index=148,
+      number=418, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTALLTYPESPROTO3_NESTEDMESSAGE, _TESTALLTYPESPROTO3_MAPINT32INT32ENTRY, _TESTALLTYPESPROTO3_MAPINT64INT64ENTRY, _TESTALLTYPESPROTO3_MAPUINT32UINT32ENTRY, _TESTALLTYPESPROTO3_MAPUINT64UINT64ENTRY, _TESTALLTYPESPROTO3_MAPSINT32SINT32ENTRY, _TESTALLTYPESPROTO3_MAPSINT64SINT64ENTRY, _TESTALLTYPESPROTO3_MAPFIXED32FIXED32ENTRY, _TESTALLTYPESPROTO3_MAPFIXED64FIXED64ENTRY, _TESTALLTYPESPROTO3_MAPSFIXED32SFIXED32ENTRY, _TESTALLTYPESPROTO3_MAPSFIXED64SFIXED64ENTRY, _TESTALLTYPESPROTO3_MAPINT32FLOATENTRY, _TESTALLTYPESPROTO3_MAPINT32DOUBLEENTRY, _TESTALLTYPESPROTO3_MAPBOOLBOOLENTRY, _TESTALLTYPESPROTO3_MAPSTRINGSTRINGENTRY, _TESTALLTYPESPROTO3_MAPSTRINGBYTESENTRY, _TESTALLTYPESPROTO3_MAPSTRINGNESTEDMESSAGEENTRY, _TESTALLTYPESPROTO3_MAPSTRINGFOREIGNMESSAGEENTRY, _TESTALLTYPESPROTO3_MAPSTRINGNESTEDENUMENTRY, _TESTALLTYPESPROTO3_MAPSTRINGFOREIGNENUMENTRY, ],
+  enum_types=[
+    _TESTALLTYPESPROTO3_NESTEDENUM,
+    _TESTALLTYPESPROTO3_ALIASEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='oneof_field', full_name='protobuf_test_messages.proto3.TestAllTypesProto3.oneof_field',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=266,
+  serialized_end=9033,
+)
+
+
+_FOREIGNMESSAGE = _descriptor.Descriptor(
+  name='ForeignMessage',
+  full_name='protobuf_test_messages.proto3.ForeignMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='c', full_name='protobuf_test_messages.proto3.ForeignMessage.c', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9035,
+  serialized_end=9062,
+)
+
+_TESTALLTYPESPROTO3_NESTEDMESSAGE.fields_by_name['corecursive'].message_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_NESTEDMESSAGE.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPINT32INT32ENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPINT64INT64ENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPUINT32UINT32ENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPUINT64UINT64ENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPSINT32SINT32ENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPSINT64SINT64ENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPFIXED32FIXED32ENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPFIXED64FIXED64ENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPSFIXED32SFIXED32ENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPSFIXED64SFIXED64ENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPINT32FLOATENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPINT32DOUBLEENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPBOOLBOOLENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPSTRINGSTRINGENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPSTRINGBYTESENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPSTRINGNESTEDMESSAGEENTRY.fields_by_name['value'].message_type = _TESTALLTYPESPROTO3_NESTEDMESSAGE
+_TESTALLTYPESPROTO3_MAPSTRINGNESTEDMESSAGEENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPSTRINGFOREIGNMESSAGEENTRY.fields_by_name['value'].message_type = _FOREIGNMESSAGE
+_TESTALLTYPESPROTO3_MAPSTRINGFOREIGNMESSAGEENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPSTRINGNESTEDENUMENTRY.fields_by_name['value'].enum_type = _TESTALLTYPESPROTO3_NESTEDENUM
+_TESTALLTYPESPROTO3_MAPSTRINGNESTEDENUMENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_MAPSTRINGFOREIGNENUMENTRY.fields_by_name['value'].enum_type = _FOREIGNENUM
+_TESTALLTYPESPROTO3_MAPSTRINGFOREIGNENUMENTRY.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3.fields_by_name['optional_nested_message'].message_type = _TESTALLTYPESPROTO3_NESTEDMESSAGE
+_TESTALLTYPESPROTO3.fields_by_name['optional_foreign_message'].message_type = _FOREIGNMESSAGE
+_TESTALLTYPESPROTO3.fields_by_name['optional_nested_enum'].enum_type = _TESTALLTYPESPROTO3_NESTEDENUM
+_TESTALLTYPESPROTO3.fields_by_name['optional_foreign_enum'].enum_type = _FOREIGNENUM
+_TESTALLTYPESPROTO3.fields_by_name['optional_aliased_enum'].enum_type = _TESTALLTYPESPROTO3_ALIASEDENUM
+_TESTALLTYPESPROTO3.fields_by_name['recursive_message'].message_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3.fields_by_name['repeated_nested_message'].message_type = _TESTALLTYPESPROTO3_NESTEDMESSAGE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_foreign_message'].message_type = _FOREIGNMESSAGE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_nested_enum'].enum_type = _TESTALLTYPESPROTO3_NESTEDENUM
+_TESTALLTYPESPROTO3.fields_by_name['repeated_foreign_enum'].enum_type = _FOREIGNENUM
+_TESTALLTYPESPROTO3.fields_by_name['packed_nested_enum'].enum_type = _TESTALLTYPESPROTO3_NESTEDENUM
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_nested_enum'].enum_type = _TESTALLTYPESPROTO3_NESTEDENUM
+_TESTALLTYPESPROTO3.fields_by_name['map_int32_int32'].message_type = _TESTALLTYPESPROTO3_MAPINT32INT32ENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_int64_int64'].message_type = _TESTALLTYPESPROTO3_MAPINT64INT64ENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_uint32_uint32'].message_type = _TESTALLTYPESPROTO3_MAPUINT32UINT32ENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_uint64_uint64'].message_type = _TESTALLTYPESPROTO3_MAPUINT64UINT64ENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_sint32_sint32'].message_type = _TESTALLTYPESPROTO3_MAPSINT32SINT32ENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_sint64_sint64'].message_type = _TESTALLTYPESPROTO3_MAPSINT64SINT64ENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_fixed32_fixed32'].message_type = _TESTALLTYPESPROTO3_MAPFIXED32FIXED32ENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_fixed64_fixed64'].message_type = _TESTALLTYPESPROTO3_MAPFIXED64FIXED64ENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_sfixed32_sfixed32'].message_type = _TESTALLTYPESPROTO3_MAPSFIXED32SFIXED32ENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_sfixed64_sfixed64'].message_type = _TESTALLTYPESPROTO3_MAPSFIXED64SFIXED64ENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_int32_float'].message_type = _TESTALLTYPESPROTO3_MAPINT32FLOATENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_int32_double'].message_type = _TESTALLTYPESPROTO3_MAPINT32DOUBLEENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_bool_bool'].message_type = _TESTALLTYPESPROTO3_MAPBOOLBOOLENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_string_string'].message_type = _TESTALLTYPESPROTO3_MAPSTRINGSTRINGENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_string_bytes'].message_type = _TESTALLTYPESPROTO3_MAPSTRINGBYTESENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_string_nested_message'].message_type = _TESTALLTYPESPROTO3_MAPSTRINGNESTEDMESSAGEENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_string_foreign_message'].message_type = _TESTALLTYPESPROTO3_MAPSTRINGFOREIGNMESSAGEENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_string_nested_enum'].message_type = _TESTALLTYPESPROTO3_MAPSTRINGNESTEDENUMENTRY
+_TESTALLTYPESPROTO3.fields_by_name['map_string_foreign_enum'].message_type = _TESTALLTYPESPROTO3_MAPSTRINGFOREIGNENUMENTRY
+_TESTALLTYPESPROTO3.fields_by_name['oneof_nested_message'].message_type = _TESTALLTYPESPROTO3_NESTEDMESSAGE
+_TESTALLTYPESPROTO3.fields_by_name['oneof_enum'].enum_type = _TESTALLTYPESPROTO3_NESTEDENUM
+_TESTALLTYPESPROTO3.fields_by_name['optional_bool_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._BOOLVALUE
+_TESTALLTYPESPROTO3.fields_by_name['optional_int32_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._INT32VALUE
+_TESTALLTYPESPROTO3.fields_by_name['optional_int64_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._INT64VALUE
+_TESTALLTYPESPROTO3.fields_by_name['optional_uint32_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._UINT32VALUE
+_TESTALLTYPESPROTO3.fields_by_name['optional_uint64_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._UINT64VALUE
+_TESTALLTYPESPROTO3.fields_by_name['optional_float_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._FLOATVALUE
+_TESTALLTYPESPROTO3.fields_by_name['optional_double_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._DOUBLEVALUE
+_TESTALLTYPESPROTO3.fields_by_name['optional_string_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._STRINGVALUE
+_TESTALLTYPESPROTO3.fields_by_name['optional_bytes_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._BYTESVALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_bool_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._BOOLVALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_int32_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._INT32VALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_int64_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._INT64VALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_uint32_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._UINT32VALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_uint64_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._UINT64VALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_float_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._FLOATVALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_double_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._DOUBLEVALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_string_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._STRINGVALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_bytes_wrapper'].message_type = google_dot_protobuf_dot_wrappers__pb2._BYTESVALUE
+_TESTALLTYPESPROTO3.fields_by_name['optional_duration'].message_type = google_dot_protobuf_dot_duration__pb2._DURATION
+_TESTALLTYPESPROTO3.fields_by_name['optional_timestamp'].message_type = google_dot_protobuf_dot_timestamp__pb2._TIMESTAMP
+_TESTALLTYPESPROTO3.fields_by_name['optional_field_mask'].message_type = google_dot_protobuf_dot_field__mask__pb2._FIELDMASK
+_TESTALLTYPESPROTO3.fields_by_name['optional_struct'].message_type = google_dot_protobuf_dot_struct__pb2._STRUCT
+_TESTALLTYPESPROTO3.fields_by_name['optional_any'].message_type = google_dot_protobuf_dot_any__pb2._ANY
+_TESTALLTYPESPROTO3.fields_by_name['optional_value'].message_type = google_dot_protobuf_dot_struct__pb2._VALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_duration'].message_type = google_dot_protobuf_dot_duration__pb2._DURATION
+_TESTALLTYPESPROTO3.fields_by_name['repeated_timestamp'].message_type = google_dot_protobuf_dot_timestamp__pb2._TIMESTAMP
+_TESTALLTYPESPROTO3.fields_by_name['repeated_fieldmask'].message_type = google_dot_protobuf_dot_field__mask__pb2._FIELDMASK
+_TESTALLTYPESPROTO3.fields_by_name['repeated_struct'].message_type = google_dot_protobuf_dot_struct__pb2._STRUCT
+_TESTALLTYPESPROTO3.fields_by_name['repeated_any'].message_type = google_dot_protobuf_dot_any__pb2._ANY
+_TESTALLTYPESPROTO3.fields_by_name['repeated_value'].message_type = google_dot_protobuf_dot_struct__pb2._VALUE
+_TESTALLTYPESPROTO3.fields_by_name['repeated_list_value'].message_type = google_dot_protobuf_dot_struct__pb2._LISTVALUE
+_TESTALLTYPESPROTO3_NESTEDENUM.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3_ALIASEDENUM.containing_type = _TESTALLTYPESPROTO3
+_TESTALLTYPESPROTO3.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO3.fields_by_name['oneof_uint32'])
+_TESTALLTYPESPROTO3.fields_by_name['oneof_uint32'].containing_oneof = _TESTALLTYPESPROTO3.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO3.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO3.fields_by_name['oneof_nested_message'])
+_TESTALLTYPESPROTO3.fields_by_name['oneof_nested_message'].containing_oneof = _TESTALLTYPESPROTO3.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO3.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO3.fields_by_name['oneof_string'])
+_TESTALLTYPESPROTO3.fields_by_name['oneof_string'].containing_oneof = _TESTALLTYPESPROTO3.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO3.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO3.fields_by_name['oneof_bytes'])
+_TESTALLTYPESPROTO3.fields_by_name['oneof_bytes'].containing_oneof = _TESTALLTYPESPROTO3.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO3.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO3.fields_by_name['oneof_bool'])
+_TESTALLTYPESPROTO3.fields_by_name['oneof_bool'].containing_oneof = _TESTALLTYPESPROTO3.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO3.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO3.fields_by_name['oneof_uint64'])
+_TESTALLTYPESPROTO3.fields_by_name['oneof_uint64'].containing_oneof = _TESTALLTYPESPROTO3.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO3.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO3.fields_by_name['oneof_float'])
+_TESTALLTYPESPROTO3.fields_by_name['oneof_float'].containing_oneof = _TESTALLTYPESPROTO3.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO3.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO3.fields_by_name['oneof_double'])
+_TESTALLTYPESPROTO3.fields_by_name['oneof_double'].containing_oneof = _TESTALLTYPESPROTO3.oneofs_by_name['oneof_field']
+_TESTALLTYPESPROTO3.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPESPROTO3.fields_by_name['oneof_enum'])
+_TESTALLTYPESPROTO3.fields_by_name['oneof_enum'].containing_oneof = _TESTALLTYPESPROTO3.oneofs_by_name['oneof_field']
+DESCRIPTOR.message_types_by_name['TestAllTypesProto3'] = _TESTALLTYPESPROTO3
+DESCRIPTOR.message_types_by_name['ForeignMessage'] = _FOREIGNMESSAGE
+DESCRIPTOR.enum_types_by_name['ForeignEnum'] = _FOREIGNENUM
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestAllTypesProto3 = _reflection.GeneratedProtocolMessageType('TestAllTypesProto3', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.NestedMessage)
+    })
+  ,
+
+  'MapInt32Int32Entry' : _reflection.GeneratedProtocolMessageType('MapInt32Int32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPINT32INT32ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32Int32Entry)
+    })
+  ,
+
+  'MapInt64Int64Entry' : _reflection.GeneratedProtocolMessageType('MapInt64Int64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPINT64INT64ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapInt64Int64Entry)
+    })
+  ,
+
+  'MapUint32Uint32Entry' : _reflection.GeneratedProtocolMessageType('MapUint32Uint32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPUINT32UINT32ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapUint32Uint32Entry)
+    })
+  ,
+
+  'MapUint64Uint64Entry' : _reflection.GeneratedProtocolMessageType('MapUint64Uint64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPUINT64UINT64ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapUint64Uint64Entry)
+    })
+  ,
+
+  'MapSint32Sint32Entry' : _reflection.GeneratedProtocolMessageType('MapSint32Sint32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPSINT32SINT32ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapSint32Sint32Entry)
+    })
+  ,
+
+  'MapSint64Sint64Entry' : _reflection.GeneratedProtocolMessageType('MapSint64Sint64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPSINT64SINT64ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapSint64Sint64Entry)
+    })
+  ,
+
+  'MapFixed32Fixed32Entry' : _reflection.GeneratedProtocolMessageType('MapFixed32Fixed32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPFIXED32FIXED32ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapFixed32Fixed32Entry)
+    })
+  ,
+
+  'MapFixed64Fixed64Entry' : _reflection.GeneratedProtocolMessageType('MapFixed64Fixed64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPFIXED64FIXED64ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapFixed64Fixed64Entry)
+    })
+  ,
+
+  'MapSfixed32Sfixed32Entry' : _reflection.GeneratedProtocolMessageType('MapSfixed32Sfixed32Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPSFIXED32SFIXED32ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapSfixed32Sfixed32Entry)
+    })
+  ,
+
+  'MapSfixed64Sfixed64Entry' : _reflection.GeneratedProtocolMessageType('MapSfixed64Sfixed64Entry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPSFIXED64SFIXED64ENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapSfixed64Sfixed64Entry)
+    })
+  ,
+
+  'MapInt32FloatEntry' : _reflection.GeneratedProtocolMessageType('MapInt32FloatEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPINT32FLOATENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32FloatEntry)
+    })
+  ,
+
+  'MapInt32DoubleEntry' : _reflection.GeneratedProtocolMessageType('MapInt32DoubleEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPINT32DOUBLEENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapInt32DoubleEntry)
+    })
+  ,
+
+  'MapBoolBoolEntry' : _reflection.GeneratedProtocolMessageType('MapBoolBoolEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPBOOLBOOLENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapBoolBoolEntry)
+    })
+  ,
+
+  'MapStringStringEntry' : _reflection.GeneratedProtocolMessageType('MapStringStringEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPSTRINGSTRINGENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapStringStringEntry)
+    })
+  ,
+
+  'MapStringBytesEntry' : _reflection.GeneratedProtocolMessageType('MapStringBytesEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPSTRINGBYTESENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapStringBytesEntry)
+    })
+  ,
+
+  'MapStringNestedMessageEntry' : _reflection.GeneratedProtocolMessageType('MapStringNestedMessageEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPSTRINGNESTEDMESSAGEENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapStringNestedMessageEntry)
+    })
+  ,
+
+  'MapStringForeignMessageEntry' : _reflection.GeneratedProtocolMessageType('MapStringForeignMessageEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPSTRINGFOREIGNMESSAGEENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapStringForeignMessageEntry)
+    })
+  ,
+
+  'MapStringNestedEnumEntry' : _reflection.GeneratedProtocolMessageType('MapStringNestedEnumEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPSTRINGNESTEDENUMENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapStringNestedEnumEntry)
+    })
+  ,
+
+  'MapStringForeignEnumEntry' : _reflection.GeneratedProtocolMessageType('MapStringForeignEnumEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPESPROTO3_MAPSTRINGFOREIGNENUMENTRY,
+    '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3.MapStringForeignEnumEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTALLTYPESPROTO3,
+  '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.TestAllTypesProto3)
+  })
+_sym_db.RegisterMessage(TestAllTypesProto3)
+_sym_db.RegisterMessage(TestAllTypesProto3.NestedMessage)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapInt32Int32Entry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapInt64Int64Entry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapUint32Uint32Entry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapUint64Uint64Entry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapSint32Sint32Entry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapSint64Sint64Entry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapFixed32Fixed32Entry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapFixed64Fixed64Entry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapSfixed32Sfixed32Entry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapSfixed64Sfixed64Entry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapInt32FloatEntry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapInt32DoubleEntry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapBoolBoolEntry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapStringStringEntry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapStringBytesEntry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapStringNestedMessageEntry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapStringForeignMessageEntry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapStringNestedEnumEntry)
+_sym_db.RegisterMessage(TestAllTypesProto3.MapStringForeignEnumEntry)
+
+ForeignMessage = _reflection.GeneratedProtocolMessageType('ForeignMessage', (_message.Message,), {
+  'DESCRIPTOR' : _FOREIGNMESSAGE,
+  '__module__' : 'google.protobuf.test_messages_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_test_messages.proto3.ForeignMessage)
+  })
+_sym_db.RegisterMessage(ForeignMessage)
+
+
+DESCRIPTOR._options = None
+_TESTALLTYPESPROTO3_MAPINT32INT32ENTRY._options = None
+_TESTALLTYPESPROTO3_MAPINT64INT64ENTRY._options = None
+_TESTALLTYPESPROTO3_MAPUINT32UINT32ENTRY._options = None
+_TESTALLTYPESPROTO3_MAPUINT64UINT64ENTRY._options = None
+_TESTALLTYPESPROTO3_MAPSINT32SINT32ENTRY._options = None
+_TESTALLTYPESPROTO3_MAPSINT64SINT64ENTRY._options = None
+_TESTALLTYPESPROTO3_MAPFIXED32FIXED32ENTRY._options = None
+_TESTALLTYPESPROTO3_MAPFIXED64FIXED64ENTRY._options = None
+_TESTALLTYPESPROTO3_MAPSFIXED32SFIXED32ENTRY._options = None
+_TESTALLTYPESPROTO3_MAPSFIXED64SFIXED64ENTRY._options = None
+_TESTALLTYPESPROTO3_MAPINT32FLOATENTRY._options = None
+_TESTALLTYPESPROTO3_MAPINT32DOUBLEENTRY._options = None
+_TESTALLTYPESPROTO3_MAPBOOLBOOLENTRY._options = None
+_TESTALLTYPESPROTO3_MAPSTRINGSTRINGENTRY._options = None
+_TESTALLTYPESPROTO3_MAPSTRINGBYTESENTRY._options = None
+_TESTALLTYPESPROTO3_MAPSTRINGNESTEDMESSAGEENTRY._options = None
+_TESTALLTYPESPROTO3_MAPSTRINGFOREIGNMESSAGEENTRY._options = None
+_TESTALLTYPESPROTO3_MAPSTRINGNESTEDENUMENTRY._options = None
+_TESTALLTYPESPROTO3_MAPSTRINGFOREIGNENUMENTRY._options = None
+_TESTALLTYPESPROTO3_ALIASEDENUM._options = None
+_TESTALLTYPESPROTO3.fields_by_name['optional_string_piece']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['optional_cord']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['repeated_string_piece']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['repeated_cord']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_int32']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_int64']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_uint32']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_uint64']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_sint32']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_sint64']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_fixed32']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_fixed64']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_sfixed32']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_sfixed64']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_float']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_double']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_bool']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['packed_nested_enum']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_int32']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_int64']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_uint32']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_uint64']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_sint32']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_sint64']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_fixed32']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_fixed64']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_sfixed32']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_sfixed64']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_float']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_double']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_bool']._options = None
+_TESTALLTYPESPROTO3.fields_by_name['unpacked_nested_enum']._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/text_encoding.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/text_encoding.py
new file mode 100644
index 0000000..3989876
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/text_encoding.py
@@ -0,0 +1,117 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Encoding related utilities."""
+import re
+
+import six
+
+_cescape_chr_to_symbol_map = {}
+_cescape_chr_to_symbol_map[9] = r'\t'  # optional escape
+_cescape_chr_to_symbol_map[10] = r'\n'  # optional escape
+_cescape_chr_to_symbol_map[13] = r'\r'  # optional escape
+_cescape_chr_to_symbol_map[34] = r'\"'  # necessary escape
+_cescape_chr_to_symbol_map[39] = r"\'"  # optional escape
+_cescape_chr_to_symbol_map[92] = r'\\'  # necessary escape
+
+# Lookup table for unicode
+_cescape_unicode_to_str = [chr(i) for i in range(0, 256)]
+for byte, string in _cescape_chr_to_symbol_map.items():
+  _cescape_unicode_to_str[byte] = string
+
+# Lookup table for non-utf8, with necessary escapes at (o >= 127 or o < 32)
+_cescape_byte_to_str = ([r'\%03o' % i for i in range(0, 32)] +
+                        [chr(i) for i in range(32, 127)] +
+                        [r'\%03o' % i for i in range(127, 256)])
+for byte, string in _cescape_chr_to_symbol_map.items():
+  _cescape_byte_to_str[byte] = string
+del byte, string
+
+
+def CEscape(text, as_utf8):
+  # type: (...) -> str
+  """Escape a bytes string for use in an text protocol buffer.
+
+  Args:
+    text: A byte string to be escaped.
+    as_utf8: Specifies if result may contain non-ASCII characters.
+        In Python 3 this allows unescaped non-ASCII Unicode characters.
+        In Python 2 the return value will be valid UTF-8 rather than only ASCII.
+  Returns:
+    Escaped string (str).
+  """
+  # Python's text.encode() 'string_escape' or 'unicode_escape' codecs do not
+  # satisfy our needs; they encodes unprintable characters using two-digit hex
+  # escapes whereas our C++ unescaping function allows hex escapes to be any
+  # length.  So, "\0011".encode('string_escape') ends up being "\\x011", which
+  # will be decoded in C++ as a single-character string with char code 0x11.
+  if six.PY3:
+    text_is_unicode = isinstance(text, str)
+    if as_utf8 and text_is_unicode:
+      # We're already unicode, no processing beyond control char escapes.
+      return text.translate(_cescape_chr_to_symbol_map)
+    ord_ = ord if text_is_unicode else lambda x: x  # bytes iterate as ints.
+  else:
+    ord_ = ord  # PY2
+  if as_utf8:
+    return ''.join(_cescape_unicode_to_str[ord_(c)] for c in text)
+  return ''.join(_cescape_byte_to_str[ord_(c)] for c in text)
+
+
+_CUNESCAPE_HEX = re.compile(r'(\\+)x([0-9a-fA-F])(?![0-9a-fA-F])')
+
+
+def CUnescape(text):
+  # type: (str) -> bytes
+  """Unescape a text string with C-style escape sequences to UTF-8 bytes.
+
+  Args:
+    text: The data to parse in a str.
+  Returns:
+    A byte string.
+  """
+
+  def ReplaceHex(m):
+    # Only replace the match if the number of leading back slashes is odd. i.e.
+    # the slash itself is not escaped.
+    if len(m.group(1)) & 1:
+      return m.group(1) + 'x0' + m.group(2)
+    return m.group(0)
+
+  # This is required because the 'string_escape' encoding doesn't
+  # allow single-digit hex escapes (like '\xf').
+  result = _CUNESCAPE_HEX.sub(ReplaceHex, text)
+
+  if six.PY2:
+    return result.decode('string_escape')
+  return (result.encode('utf-8')  # PY3: Make it bytes to allow decode.
+          .decode('unicode_escape')
+          # Make it bytes again to return the proper type.
+          .encode('raw_unicode_escape'))
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/text_format.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/text_format.py
new file mode 100644
index 0000000..8387218
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/text_format.py
@@ -0,0 +1,1819 @@
+# Protocol Buffers - Google's data interchange format
+# Copyright 2008 Google Inc.  All rights reserved.
+# https://developers.google.com/protocol-buffers/
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Contains routines for printing protocol messages in text format.
+
+Simple usage example::
+
+  # Create a proto object and serialize it to a text proto string.
+  message = my_proto_pb2.MyMessage(foo='bar')
+  text_proto = text_format.MessageToString(message)
+
+  # Parse a text proto string.
+  message = text_format.Parse(text_proto, my_proto_pb2.MyMessage())
+"""
+
+__author__ = 'kenton@google.com (Kenton Varda)'
+
+# TODO(b/129989314) Import thread contention leads to test failures.
+import encodings.raw_unicode_escape  # pylint: disable=unused-import
+import encodings.unicode_escape  # pylint: disable=unused-import
+import io
+import re
+
+import six
+
+if six.PY3:
+  long = int  # pylint: disable=redefined-builtin,invalid-name
+
+# pylint: disable=g-import-not-at-top
+from google.protobuf.internal import decoder
+from google.protobuf.internal import type_checkers
+from google.protobuf import descriptor
+from google.protobuf import text_encoding
+
+__all__ = ['MessageToString', 'Parse', 'PrintMessage', 'PrintField',
+           'PrintFieldValue', 'Merge', 'MessageToBytes']
+
+_INTEGER_CHECKERS = (type_checkers.Uint32ValueChecker(),
+                     type_checkers.Int32ValueChecker(),
+                     type_checkers.Uint64ValueChecker(),
+                     type_checkers.Int64ValueChecker())
+_FLOAT_INFINITY = re.compile('-?inf(?:inity)?f?$', re.IGNORECASE)
+_FLOAT_NAN = re.compile('nanf?$', re.IGNORECASE)
+_QUOTES = frozenset(("'", '"'))
+_ANY_FULL_TYPE_NAME = 'google.protobuf.Any'
+
+
+class Error(Exception):
+  """Top-level module error for text_format."""
+
+
+class ParseError(Error):
+  """Thrown in case of text parsing or tokenizing error."""
+
+  def __init__(self, message=None, line=None, column=None):
+    if message is not None and line is not None:
+      loc = str(line)
+      if column is not None:
+        loc += ':{0}'.format(column)
+      message = '{0} : {1}'.format(loc, message)
+    if message is not None:
+      super(ParseError, self).__init__(message)
+    else:
+      super(ParseError, self).__init__()
+    self._line = line
+    self._column = column
+
+  def GetLine(self):
+    return self._line
+
+  def GetColumn(self):
+    return self._column
+
+
+class TextWriter(object):
+
+  def __init__(self, as_utf8):
+    if six.PY2:
+      self._writer = io.BytesIO()
+    else:
+      self._writer = io.StringIO()
+
+  def write(self, val):
+    if six.PY2:
+      if isinstance(val, six.text_type):
+        val = val.encode('utf-8')
+    return self._writer.write(val)
+
+  def close(self):
+    return self._writer.close()
+
+  def getvalue(self):
+    return self._writer.getvalue()
+
+
+def MessageToString(
+    message,
+    as_utf8=False,
+    as_one_line=False,
+    use_short_repeated_primitives=False,
+    pointy_brackets=False,
+    use_index_order=False,
+    float_format=None,
+    double_format=None,
+    use_field_number=False,
+    descriptor_pool=None,
+    indent=0,
+    message_formatter=None,
+    print_unknown_fields=False,
+    force_colon=False):
+  # type: (...) -> str
+  """Convert protobuf message to text format.
+
+  Double values can be formatted compactly with 15 digits of
+  precision (which is the most that IEEE 754 "double" can guarantee)
+  using double_format='.15g'. To ensure that converting to text and back to a
+  proto will result in an identical value, double_format='.17g' should be used.
+
+  Args:
+    message: The protocol buffers message.
+    as_utf8: Return unescaped Unicode for non-ASCII characters.
+        In Python 3 actual Unicode characters may appear as is in strings.
+        In Python 2 the return value will be valid UTF-8 rather than only ASCII.
+    as_one_line: Don't introduce newlines between fields.
+    use_short_repeated_primitives: Use short repeated format for primitives.
+    pointy_brackets: If True, use angle brackets instead of curly braces for
+      nesting.
+    use_index_order: If True, fields of a proto message will be printed using
+      the order defined in source code instead of the field number, extensions
+      will be printed at the end of the message and their relative order is
+      determined by the extension number. By default, use the field number
+      order.
+    float_format (str): If set, use this to specify float field formatting
+      (per the "Format Specification Mini-Language"); otherwise, shortest float
+      that has same value in wire will be printed. Also affect double field
+      if double_format is not set but float_format is set.
+    double_format (str): If set, use this to specify double field formatting
+      (per the "Format Specification Mini-Language"); if it is not set but
+      float_format is set, use float_format. Otherwise, use ``str()``
+    use_field_number: If True, print field numbers instead of names.
+    descriptor_pool (DescriptorPool): Descriptor pool used to resolve Any types.
+    indent (int): The initial indent level, in terms of spaces, for pretty
+      print.
+    message_formatter (function(message, indent, as_one_line) -> unicode|None):
+      Custom formatter for selected sub-messages (usually based on message
+      type). Use to pretty print parts of the protobuf for easier diffing.
+    print_unknown_fields: If True, unknown fields will be printed.
+    force_colon: If set, a colon will be added after the field name even if the
+      field is a proto message.
+
+  Returns:
+    str: A string of the text formatted protocol buffer message.
+  """
+  out = TextWriter(as_utf8)
+  printer = _Printer(
+      out,
+      indent,
+      as_utf8,
+      as_one_line,
+      use_short_repeated_primitives,
+      pointy_brackets,
+      use_index_order,
+      float_format,
+      double_format,
+      use_field_number,
+      descriptor_pool,
+      message_formatter,
+      print_unknown_fields=print_unknown_fields,
+      force_colon=force_colon)
+  printer.PrintMessage(message)
+  result = out.getvalue()
+  out.close()
+  if as_one_line:
+    return result.rstrip()
+  return result
+
+
+def MessageToBytes(message, **kwargs):
+  # type: (...) -> bytes
+  """Convert protobuf message to encoded text format.  See MessageToString."""
+  text = MessageToString(message, **kwargs)
+  if isinstance(text, bytes):
+    return text
+  codec = 'utf-8' if kwargs.get('as_utf8') else 'ascii'
+  return text.encode(codec)
+
+
+def _IsMapEntry(field):
+  return (field.type == descriptor.FieldDescriptor.TYPE_MESSAGE and
+          field.message_type.has_options and
+          field.message_type.GetOptions().map_entry)
+
+
+def PrintMessage(message,
+                 out,
+                 indent=0,
+                 as_utf8=False,
+                 as_one_line=False,
+                 use_short_repeated_primitives=False,
+                 pointy_brackets=False,
+                 use_index_order=False,
+                 float_format=None,
+                 double_format=None,
+                 use_field_number=False,
+                 descriptor_pool=None,
+                 message_formatter=None,
+                 print_unknown_fields=False,
+                 force_colon=False):
+  printer = _Printer(
+      out=out, indent=indent, as_utf8=as_utf8,
+      as_one_line=as_one_line,
+      use_short_repeated_primitives=use_short_repeated_primitives,
+      pointy_brackets=pointy_brackets,
+      use_index_order=use_index_order,
+      float_format=float_format,
+      double_format=double_format,
+      use_field_number=use_field_number,
+      descriptor_pool=descriptor_pool,
+      message_formatter=message_formatter,
+      print_unknown_fields=print_unknown_fields,
+      force_colon=force_colon)
+  printer.PrintMessage(message)
+
+
+def PrintField(field,
+               value,
+               out,
+               indent=0,
+               as_utf8=False,
+               as_one_line=False,
+               use_short_repeated_primitives=False,
+               pointy_brackets=False,
+               use_index_order=False,
+               float_format=None,
+               double_format=None,
+               message_formatter=None,
+               print_unknown_fields=False,
+               force_colon=False):
+  """Print a single field name/value pair."""
+  printer = _Printer(out, indent, as_utf8, as_one_line,
+                     use_short_repeated_primitives, pointy_brackets,
+                     use_index_order, float_format, double_format,
+                     message_formatter=message_formatter,
+                     print_unknown_fields=print_unknown_fields,
+                     force_colon=force_colon)
+  printer.PrintField(field, value)
+
+
+def PrintFieldValue(field,
+                    value,
+                    out,
+                    indent=0,
+                    as_utf8=False,
+                    as_one_line=False,
+                    use_short_repeated_primitives=False,
+                    pointy_brackets=False,
+                    use_index_order=False,
+                    float_format=None,
+                    double_format=None,
+                    message_formatter=None,
+                    print_unknown_fields=False,
+                    force_colon=False):
+  """Print a single field value (not including name)."""
+  printer = _Printer(out, indent, as_utf8, as_one_line,
+                     use_short_repeated_primitives, pointy_brackets,
+                     use_index_order, float_format, double_format,
+                     message_formatter=message_formatter,
+                     print_unknown_fields=print_unknown_fields,
+                     force_colon=force_colon)
+  printer.PrintFieldValue(field, value)
+
+
+def _BuildMessageFromTypeName(type_name, descriptor_pool):
+  """Returns a protobuf message instance.
+
+  Args:
+    type_name: Fully-qualified protobuf  message type name string.
+    descriptor_pool: DescriptorPool instance.
+
+  Returns:
+    A Message instance of type matching type_name, or None if the a Descriptor
+    wasn't found matching type_name.
+  """
+  # pylint: disable=g-import-not-at-top
+  if descriptor_pool is None:
+    from google.protobuf import descriptor_pool as pool_mod
+    descriptor_pool = pool_mod.Default()
+  from google.protobuf import symbol_database
+  database = symbol_database.Default()
+  try:
+    message_descriptor = descriptor_pool.FindMessageTypeByName(type_name)
+  except KeyError:
+    return None
+  message_type = database.GetPrototype(message_descriptor)
+  return message_type()
+
+
+# These values must match WireType enum in google/protobuf/wire_format.h.
+WIRETYPE_LENGTH_DELIMITED = 2
+WIRETYPE_START_GROUP = 3
+
+
+class _Printer(object):
+  """Text format printer for protocol message."""
+
+  def __init__(
+      self,
+      out,
+      indent=0,
+      as_utf8=False,
+      as_one_line=False,
+      use_short_repeated_primitives=False,
+      pointy_brackets=False,
+      use_index_order=False,
+      float_format=None,
+      double_format=None,
+      use_field_number=False,
+      descriptor_pool=None,
+      message_formatter=None,
+      print_unknown_fields=False,
+      force_colon=False):
+    """Initialize the Printer.
+
+    Double values can be formatted compactly with 15 digits of precision
+    (which is the most that IEEE 754 "double" can guarantee) using
+    double_format='.15g'. To ensure that converting to text and back to a proto
+    will result in an identical value, double_format='.17g' should be used.
+
+    Args:
+      out: To record the text format result.
+      indent: The initial indent level for pretty print.
+      as_utf8: Return unescaped Unicode for non-ASCII characters.
+          In Python 3 actual Unicode characters may appear as is in strings.
+          In Python 2 the return value will be valid UTF-8 rather than ASCII.
+      as_one_line: Don't introduce newlines between fields.
+      use_short_repeated_primitives: Use short repeated format for primitives.
+      pointy_brackets: If True, use angle brackets instead of curly braces for
+        nesting.
+      use_index_order: If True, print fields of a proto message using the order
+        defined in source code instead of the field number. By default, use the
+        field number order.
+      float_format: If set, use this to specify float field formatting
+        (per the "Format Specification Mini-Language"); otherwise, shortest
+        float that has same value in wire will be printed. Also affect double
+        field if double_format is not set but float_format is set.
+      double_format: If set, use this to specify double field formatting
+        (per the "Format Specification Mini-Language"); if it is not set but
+        float_format is set, use float_format. Otherwise, str() is used.
+      use_field_number: If True, print field numbers instead of names.
+      descriptor_pool: A DescriptorPool used to resolve Any types.
+      message_formatter: A function(message, indent, as_one_line): unicode|None
+        to custom format selected sub-messages (usually based on message type).
+        Use to pretty print parts of the protobuf for easier diffing.
+      print_unknown_fields: If True, unknown fields will be printed.
+      force_colon: If set, a colon will be added after the field name even if
+        the field is a proto message.
+    """
+    self.out = out
+    self.indent = indent
+    self.as_utf8 = as_utf8
+    self.as_one_line = as_one_line
+    self.use_short_repeated_primitives = use_short_repeated_primitives
+    self.pointy_brackets = pointy_brackets
+    self.use_index_order = use_index_order
+    self.float_format = float_format
+    if double_format is not None:
+      self.double_format = double_format
+    else:
+      self.double_format = float_format
+    self.use_field_number = use_field_number
+    self.descriptor_pool = descriptor_pool
+    self.message_formatter = message_formatter
+    self.print_unknown_fields = print_unknown_fields
+    self.force_colon = force_colon
+
+  def _TryPrintAsAnyMessage(self, message):
+    """Serializes if message is a google.protobuf.Any field."""
+    if '/' not in message.type_url:
+      return False
+    packed_message = _BuildMessageFromTypeName(message.TypeName(),
+                                               self.descriptor_pool)
+    if packed_message:
+      packed_message.MergeFromString(message.value)
+      colon = ':' if self.force_colon else ''
+      self.out.write('%s[%s]%s ' % (self.indent * ' ', message.type_url, colon))
+      self._PrintMessageFieldValue(packed_message)
+      self.out.write(' ' if self.as_one_line else '\n')
+      return True
+    else:
+      return False
+
+  def _TryCustomFormatMessage(self, message):
+    formatted = self.message_formatter(message, self.indent, self.as_one_line)
+    if formatted is None:
+      return False
+
+    out = self.out
+    out.write(' ' * self.indent)
+    out.write(formatted)
+    out.write(' ' if self.as_one_line else '\n')
+    return True
+
+  def PrintMessage(self, message):
+    """Convert protobuf message to text format.
+
+    Args:
+      message: The protocol buffers message.
+    """
+    if self.message_formatter and self._TryCustomFormatMessage(message):
+      return
+    if (message.DESCRIPTOR.full_name == _ANY_FULL_TYPE_NAME and
+        self._TryPrintAsAnyMessage(message)):
+      return
+    fields = message.ListFields()
+    if self.use_index_order:
+      fields.sort(
+          key=lambda x: x[0].number if x[0].is_extension else x[0].index)
+    for field, value in fields:
+      if _IsMapEntry(field):
+        for key in sorted(value):
+          # This is slow for maps with submessage entries because it copies the
+          # entire tree.  Unfortunately this would take significant refactoring
+          # of this file to work around.
+          #
+          # TODO(haberman): refactor and optimize if this becomes an issue.
+          entry_submsg = value.GetEntryClass()(key=key, value=value[key])
+          self.PrintField(field, entry_submsg)
+      elif field.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+        if (self.use_short_repeated_primitives
+            and field.cpp_type != descriptor.FieldDescriptor.CPPTYPE_MESSAGE
+            and field.cpp_type != descriptor.FieldDescriptor.CPPTYPE_STRING):
+          self._PrintShortRepeatedPrimitivesValue(field, value)
+        else:
+          for element in value:
+            self.PrintField(field, element)
+      else:
+        self.PrintField(field, value)
+
+    if self.print_unknown_fields:
+      self._PrintUnknownFields(message.UnknownFields())
+
+  def _PrintUnknownFields(self, unknown_fields):
+    """Print unknown fields."""
+    out = self.out
+    for field in unknown_fields:
+      out.write(' ' * self.indent)
+      out.write(str(field.field_number))
+      if field.wire_type == WIRETYPE_START_GROUP:
+        if self.as_one_line:
+          out.write(' { ')
+        else:
+          out.write(' {\n')
+          self.indent += 2
+
+        self._PrintUnknownFields(field.data)
+
+        if self.as_one_line:
+          out.write('} ')
+        else:
+          self.indent -= 2
+          out.write(' ' * self.indent + '}\n')
+      elif field.wire_type == WIRETYPE_LENGTH_DELIMITED:
+        try:
+          # If this field is parseable as a Message, it is probably
+          # an embedded message.
+          # pylint: disable=protected-access
+          (embedded_unknown_message, pos) = decoder._DecodeUnknownFieldSet(
+              memoryview(field.data), 0, len(field.data))
+        except Exception:    # pylint: disable=broad-except
+          pos = 0
+
+        if pos == len(field.data):
+          if self.as_one_line:
+            out.write(' { ')
+          else:
+            out.write(' {\n')
+            self.indent += 2
+
+          self._PrintUnknownFields(embedded_unknown_message)
+
+          if self.as_one_line:
+            out.write('} ')
+          else:
+            self.indent -= 2
+            out.write(' ' * self.indent + '}\n')
+        else:
+          # A string or bytes field. self.as_utf8 may not work.
+          out.write(': \"')
+          out.write(text_encoding.CEscape(field.data, False))
+          out.write('\" ' if self.as_one_line else '\"\n')
+      else:
+        # varint, fixed32, fixed64
+        out.write(': ')
+        out.write(str(field.data))
+        out.write(' ' if self.as_one_line else '\n')
+
+  def _PrintFieldName(self, field):
+    """Print field name."""
+    out = self.out
+    out.write(' ' * self.indent)
+    if self.use_field_number:
+      out.write(str(field.number))
+    else:
+      if field.is_extension:
+        out.write('[')
+        if (field.containing_type.GetOptions().message_set_wire_format and
+            field.type == descriptor.FieldDescriptor.TYPE_MESSAGE and
+            field.label == descriptor.FieldDescriptor.LABEL_OPTIONAL):
+          out.write(field.message_type.full_name)
+        else:
+          out.write(field.full_name)
+        out.write(']')
+      elif field.type == descriptor.FieldDescriptor.TYPE_GROUP:
+        # For groups, use the capitalized name.
+        out.write(field.message_type.name)
+      else:
+        out.write(field.name)
+
+    if (self.force_colon or
+        field.cpp_type != descriptor.FieldDescriptor.CPPTYPE_MESSAGE):
+      # The colon is optional in this case, but our cross-language golden files
+      # don't include it. Here, the colon is only included if force_colon is
+      # set to True
+      out.write(':')
+
+  def PrintField(self, field, value):
+    """Print a single field name/value pair."""
+    self._PrintFieldName(field)
+    self.out.write(' ')
+    self.PrintFieldValue(field, value)
+    self.out.write(' ' if self.as_one_line else '\n')
+
+  def _PrintShortRepeatedPrimitivesValue(self, field, value):
+    """"Prints short repeated primitives value."""
+    # Note: this is called only when value has at least one element.
+    self._PrintFieldName(field)
+    self.out.write(' [')
+    for i in six.moves.range(len(value) - 1):
+      self.PrintFieldValue(field, value[i])
+      self.out.write(', ')
+    self.PrintFieldValue(field, value[-1])
+    self.out.write(']')
+    if self.force_colon:
+      self.out.write(':')
+    self.out.write(' ' if self.as_one_line else '\n')
+
+  def _PrintMessageFieldValue(self, value):
+    if self.pointy_brackets:
+      openb = '<'
+      closeb = '>'
+    else:
+      openb = '{'
+      closeb = '}'
+
+    if self.as_one_line:
+      self.out.write('%s ' % openb)
+      self.PrintMessage(value)
+      self.out.write(closeb)
+    else:
+      self.out.write('%s\n' % openb)
+      self.indent += 2
+      self.PrintMessage(value)
+      self.indent -= 2
+      self.out.write(' ' * self.indent + closeb)
+
+  def PrintFieldValue(self, field, value):
+    """Print a single field value (not including name).
+
+    For repeated fields, the value should be a single element.
+
+    Args:
+      field: The descriptor of the field to be printed.
+      value: The value of the field.
+    """
+    out = self.out
+    if field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_MESSAGE:
+      self._PrintMessageFieldValue(value)
+    elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_ENUM:
+      enum_value = field.enum_type.values_by_number.get(value, None)
+      if enum_value is not None:
+        out.write(enum_value.name)
+      else:
+        out.write(str(value))
+    elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_STRING:
+      out.write('\"')
+      if isinstance(value, six.text_type) and (six.PY2 or not self.as_utf8):
+        out_value = value.encode('utf-8')
+      else:
+        out_value = value
+      if field.type == descriptor.FieldDescriptor.TYPE_BYTES:
+        # We always need to escape all binary data in TYPE_BYTES fields.
+        out_as_utf8 = False
+      else:
+        out_as_utf8 = self.as_utf8
+      out.write(text_encoding.CEscape(out_value, out_as_utf8))
+      out.write('\"')
+    elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_BOOL:
+      if value:
+        out.write('true')
+      else:
+        out.write('false')
+    elif field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_FLOAT:
+      if self.float_format is not None:
+        out.write('{1:{0}}'.format(self.float_format, value))
+      else:
+        out.write(str(type_checkers.ToShortestFloat(value)))
+    elif (field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_DOUBLE and
+          self.double_format is not None):
+      out.write('{1:{0}}'.format(self.double_format, value))
+    else:
+      out.write(str(value))
+
+
+def Parse(text,
+          message,
+          allow_unknown_extension=False,
+          allow_field_number=False,
+          descriptor_pool=None,
+          allow_unknown_field=False):
+  """Parses a text representation of a protocol message into a message.
+
+  NOTE: for historical reasons this function does not clear the input
+  message. This is different from what the binary msg.ParseFrom(...) does.
+  If text contains a field already set in message, the value is appended if the
+  field is repeated. Otherwise, an error is raised.
+
+  Example::
+
+    a = MyProto()
+    a.repeated_field.append('test')
+    b = MyProto()
+
+    # Repeated fields are combined
+    text_format.Parse(repr(a), b)
+    text_format.Parse(repr(a), b) # repeated_field contains ["test", "test"]
+
+    # Non-repeated fields cannot be overwritten
+    a.singular_field = 1
+    b.singular_field = 2
+    text_format.Parse(repr(a), b) # ParseError
+
+    # Binary version:
+    b.ParseFromString(a.SerializeToString()) # repeated_field is now "test"
+
+  Caller is responsible for clearing the message as needed.
+
+  Args:
+    text (str): Message text representation.
+    message (Message): A protocol buffer message to merge into.
+    allow_unknown_extension: if True, skip over missing extensions and keep
+      parsing
+    allow_field_number: if True, both field number and field name are allowed.
+    descriptor_pool (DescriptorPool): Descriptor pool used to resolve Any types.
+    allow_unknown_field: if True, skip over unknown field and keep
+      parsing. Avoid to use this option if possible. It may hide some
+      errors (e.g. spelling error on field name)
+
+  Returns:
+    Message: The same message passed as argument.
+
+  Raises:
+    ParseError: On text parsing problems.
+  """
+  return ParseLines(text.split(b'\n' if isinstance(text, bytes) else u'\n'),
+                    message,
+                    allow_unknown_extension,
+                    allow_field_number,
+                    descriptor_pool=descriptor_pool,
+                    allow_unknown_field=allow_unknown_field)
+
+
+def Merge(text,
+          message,
+          allow_unknown_extension=False,
+          allow_field_number=False,
+          descriptor_pool=None,
+          allow_unknown_field=False):
+  """Parses a text representation of a protocol message into a message.
+
+  Like Parse(), but allows repeated values for a non-repeated field, and uses
+  the last one. This means any non-repeated, top-level fields specified in text
+  replace those in the message.
+
+  Args:
+    text (str): Message text representation.
+    message (Message): A protocol buffer message to merge into.
+    allow_unknown_extension: if True, skip over missing extensions and keep
+      parsing
+    allow_field_number: if True, both field number and field name are allowed.
+    descriptor_pool (DescriptorPool): Descriptor pool used to resolve Any types.
+    allow_unknown_field: if True, skip over unknown field and keep
+      parsing. Avoid to use this option if possible. It may hide some
+      errors (e.g. spelling error on field name)
+
+  Returns:
+    Message: The same message passed as argument.
+
+  Raises:
+    ParseError: On text parsing problems.
+  """
+  return MergeLines(
+      text.split(b'\n' if isinstance(text, bytes) else u'\n'),
+      message,
+      allow_unknown_extension,
+      allow_field_number,
+      descriptor_pool=descriptor_pool,
+      allow_unknown_field=allow_unknown_field)
+
+
+def ParseLines(lines,
+               message,
+               allow_unknown_extension=False,
+               allow_field_number=False,
+               descriptor_pool=None,
+               allow_unknown_field=False):
+  """Parses a text representation of a protocol message into a message.
+
+  See Parse() for caveats.
+
+  Args:
+    lines: An iterable of lines of a message's text representation.
+    message: A protocol buffer message to merge into.
+    allow_unknown_extension: if True, skip over missing extensions and keep
+      parsing
+    allow_field_number: if True, both field number and field name are allowed.
+    descriptor_pool: A DescriptorPool used to resolve Any types.
+    allow_unknown_field: if True, skip over unknown field and keep
+      parsing. Avoid to use this option if possible. It may hide some
+      errors (e.g. spelling error on field name)
+
+  Returns:
+    The same message passed as argument.
+
+  Raises:
+    ParseError: On text parsing problems.
+  """
+  parser = _Parser(allow_unknown_extension,
+                   allow_field_number,
+                   descriptor_pool=descriptor_pool,
+                   allow_unknown_field=allow_unknown_field)
+  return parser.ParseLines(lines, message)
+
+
+def MergeLines(lines,
+               message,
+               allow_unknown_extension=False,
+               allow_field_number=False,
+               descriptor_pool=None,
+               allow_unknown_field=False):
+  """Parses a text representation of a protocol message into a message.
+
+  See Merge() for more details.
+
+  Args:
+    lines: An iterable of lines of a message's text representation.
+    message: A protocol buffer message to merge into.
+    allow_unknown_extension: if True, skip over missing extensions and keep
+      parsing
+    allow_field_number: if True, both field number and field name are allowed.
+    descriptor_pool: A DescriptorPool used to resolve Any types.
+    allow_unknown_field: if True, skip over unknown field and keep
+      parsing. Avoid to use this option if possible. It may hide some
+      errors (e.g. spelling error on field name)
+
+  Returns:
+    The same message passed as argument.
+
+  Raises:
+    ParseError: On text parsing problems.
+  """
+  parser = _Parser(allow_unknown_extension,
+                   allow_field_number,
+                   descriptor_pool=descriptor_pool,
+                   allow_unknown_field=allow_unknown_field)
+  return parser.MergeLines(lines, message)
+
+
+class _Parser(object):
+  """Text format parser for protocol message."""
+
+  def __init__(self,
+               allow_unknown_extension=False,
+               allow_field_number=False,
+               descriptor_pool=None,
+               allow_unknown_field=False):
+    self.allow_unknown_extension = allow_unknown_extension
+    self.allow_field_number = allow_field_number
+    self.descriptor_pool = descriptor_pool
+    self.allow_unknown_field = allow_unknown_field
+
+  def ParseLines(self, lines, message):
+    """Parses a text representation of a protocol message into a message."""
+    self._allow_multiple_scalars = False
+    self._ParseOrMerge(lines, message)
+    return message
+
+  def MergeLines(self, lines, message):
+    """Merges a text representation of a protocol message into a message."""
+    self._allow_multiple_scalars = True
+    self._ParseOrMerge(lines, message)
+    return message
+
+  def _ParseOrMerge(self, lines, message):
+    """Converts a text representation of a protocol message into a message.
+
+    Args:
+      lines: Lines of a message's text representation.
+      message: A protocol buffer message to merge into.
+
+    Raises:
+      ParseError: On text parsing problems.
+    """
+    # Tokenize expects native str lines.
+    if six.PY2:
+      str_lines = (line if isinstance(line, str) else line.encode('utf-8')
+                   for line in lines)
+    else:
+      str_lines = (line if isinstance(line, str) else line.decode('utf-8')
+                   for line in lines)
+    tokenizer = Tokenizer(str_lines)
+    while not tokenizer.AtEnd():
+      self._MergeField(tokenizer, message)
+
+  def _MergeField(self, tokenizer, message):
+    """Merges a single protocol message field into a message.
+
+    Args:
+      tokenizer: A tokenizer to parse the field name and values.
+      message: A protocol message to record the data.
+
+    Raises:
+      ParseError: In case of text parsing problems.
+    """
+    message_descriptor = message.DESCRIPTOR
+    if (message_descriptor.full_name == _ANY_FULL_TYPE_NAME and
+        tokenizer.TryConsume('[')):
+      type_url_prefix, packed_type_name = self._ConsumeAnyTypeUrl(tokenizer)
+      tokenizer.Consume(']')
+      tokenizer.TryConsume(':')
+      if tokenizer.TryConsume('<'):
+        expanded_any_end_token = '>'
+      else:
+        tokenizer.Consume('{')
+        expanded_any_end_token = '}'
+      expanded_any_sub_message = _BuildMessageFromTypeName(packed_type_name,
+                                                           self.descriptor_pool)
+      if not expanded_any_sub_message:
+        raise ParseError('Type %s not found in descriptor pool' %
+                         packed_type_name)
+      while not tokenizer.TryConsume(expanded_any_end_token):
+        if tokenizer.AtEnd():
+          raise tokenizer.ParseErrorPreviousToken('Expected "%s".' %
+                                                  (expanded_any_end_token,))
+        self._MergeField(tokenizer, expanded_any_sub_message)
+      message.Pack(expanded_any_sub_message,
+                   type_url_prefix=type_url_prefix)
+      return
+
+    if tokenizer.TryConsume('['):
+      name = [tokenizer.ConsumeIdentifier()]
+      while tokenizer.TryConsume('.'):
+        name.append(tokenizer.ConsumeIdentifier())
+      name = '.'.join(name)
+
+      if not message_descriptor.is_extendable:
+        raise tokenizer.ParseErrorPreviousToken(
+            'Message type "%s" does not have extensions.' %
+            message_descriptor.full_name)
+      # pylint: disable=protected-access
+      field = message.Extensions._FindExtensionByName(name)
+      # pylint: enable=protected-access
+      if not field:
+        if self.allow_unknown_extension:
+          field = None
+        else:
+          raise tokenizer.ParseErrorPreviousToken(
+              'Extension "%s" not registered. '
+              'Did you import the _pb2 module which defines it? '
+              'If you are trying to place the extension in the MessageSet '
+              'field of another message that is in an Any or MessageSet field, '
+              'that message\'s _pb2 module must be imported as well' % name)
+      elif message_descriptor != field.containing_type:
+        raise tokenizer.ParseErrorPreviousToken(
+            'Extension "%s" does not extend message type "%s".' %
+            (name, message_descriptor.full_name))
+
+      tokenizer.Consume(']')
+
+    else:
+      name = tokenizer.ConsumeIdentifierOrNumber()
+      if self.allow_field_number and name.isdigit():
+        number = ParseInteger(name, True, True)
+        field = message_descriptor.fields_by_number.get(number, None)
+        if not field and message_descriptor.is_extendable:
+          field = message.Extensions._FindExtensionByNumber(number)
+      else:
+        field = message_descriptor.fields_by_name.get(name, None)
+
+        # Group names are expected to be capitalized as they appear in the
+        # .proto file, which actually matches their type names, not their field
+        # names.
+        if not field:
+          field = message_descriptor.fields_by_name.get(name.lower(), None)
+          if field and field.type != descriptor.FieldDescriptor.TYPE_GROUP:
+            field = None
+
+        if (field and field.type == descriptor.FieldDescriptor.TYPE_GROUP and
+            field.message_type.name != name):
+          field = None
+
+      if not field and not self.allow_unknown_field:
+        raise tokenizer.ParseErrorPreviousToken(
+            'Message type "%s" has no field named "%s".' %
+            (message_descriptor.full_name, name))
+
+    if field:
+      if not self._allow_multiple_scalars and field.containing_oneof:
+        # Check if there's a different field set in this oneof.
+        # Note that we ignore the case if the same field was set before, and we
+        # apply _allow_multiple_scalars to non-scalar fields as well.
+        which_oneof = message.WhichOneof(field.containing_oneof.name)
+        if which_oneof is not None and which_oneof != field.name:
+          raise tokenizer.ParseErrorPreviousToken(
+              'Field "%s" is specified along with field "%s", another member '
+              'of oneof "%s" for message type "%s".' %
+              (field.name, which_oneof, field.containing_oneof.name,
+               message_descriptor.full_name))
+
+      if field.cpp_type == descriptor.FieldDescriptor.CPPTYPE_MESSAGE:
+        tokenizer.TryConsume(':')
+        merger = self._MergeMessageField
+      else:
+        tokenizer.Consume(':')
+        merger = self._MergeScalarField
+
+      if (field.label == descriptor.FieldDescriptor.LABEL_REPEATED and
+          tokenizer.TryConsume('[')):
+        # Short repeated format, e.g. "foo: [1, 2, 3]"
+        if not tokenizer.TryConsume(']'):
+          while True:
+            merger(tokenizer, message, field)
+            if tokenizer.TryConsume(']'):
+              break
+            tokenizer.Consume(',')
+
+      else:
+        merger(tokenizer, message, field)
+
+    else:  # Proto field is unknown.
+      assert (self.allow_unknown_extension or self.allow_unknown_field)
+      _SkipFieldContents(tokenizer)
+
+    # For historical reasons, fields may optionally be separated by commas or
+    # semicolons.
+    if not tokenizer.TryConsume(','):
+      tokenizer.TryConsume(';')
+
+  def _ConsumeAnyTypeUrl(self, tokenizer):
+    """Consumes a google.protobuf.Any type URL and returns the type name."""
+    # Consume "type.googleapis.com/".
+    prefix = [tokenizer.ConsumeIdentifier()]
+    tokenizer.Consume('.')
+    prefix.append(tokenizer.ConsumeIdentifier())
+    tokenizer.Consume('.')
+    prefix.append(tokenizer.ConsumeIdentifier())
+    tokenizer.Consume('/')
+    # Consume the fully-qualified type name.
+    name = [tokenizer.ConsumeIdentifier()]
+    while tokenizer.TryConsume('.'):
+      name.append(tokenizer.ConsumeIdentifier())
+    return '.'.join(prefix), '.'.join(name)
+
+  def _MergeMessageField(self, tokenizer, message, field):
+    """Merges a single scalar field into a message.
+
+    Args:
+      tokenizer: A tokenizer to parse the field value.
+      message: The message of which field is a member.
+      field: The descriptor of the field to be merged.
+
+    Raises:
+      ParseError: In case of text parsing problems.
+    """
+    is_map_entry = _IsMapEntry(field)
+
+    if tokenizer.TryConsume('<'):
+      end_token = '>'
+    else:
+      tokenizer.Consume('{')
+      end_token = '}'
+
+    if field.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+      if field.is_extension:
+        sub_message = message.Extensions[field].add()
+      elif is_map_entry:
+        sub_message = getattr(message, field.name).GetEntryClass()()
+      else:
+        sub_message = getattr(message, field.name).add()
+    else:
+      if field.is_extension:
+        if (not self._allow_multiple_scalars and
+            message.HasExtension(field)):
+          raise tokenizer.ParseErrorPreviousToken(
+              'Message type "%s" should not have multiple "%s" extensions.' %
+              (message.DESCRIPTOR.full_name, field.full_name))
+        sub_message = message.Extensions[field]
+      else:
+        # Also apply _allow_multiple_scalars to message field.
+        # TODO(jieluo): Change to _allow_singular_overwrites.
+        if (not self._allow_multiple_scalars and
+            message.HasField(field.name)):
+          raise tokenizer.ParseErrorPreviousToken(
+              'Message type "%s" should not have multiple "%s" fields.' %
+              (message.DESCRIPTOR.full_name, field.name))
+        sub_message = getattr(message, field.name)
+      sub_message.SetInParent()
+
+    while not tokenizer.TryConsume(end_token):
+      if tokenizer.AtEnd():
+        raise tokenizer.ParseErrorPreviousToken('Expected "%s".' % (end_token,))
+      self._MergeField(tokenizer, sub_message)
+
+    if is_map_entry:
+      value_cpptype = field.message_type.fields_by_name['value'].cpp_type
+      if value_cpptype == descriptor.FieldDescriptor.CPPTYPE_MESSAGE:
+        value = getattr(message, field.name)[sub_message.key]
+        value.MergeFrom(sub_message.value)
+      else:
+        getattr(message, field.name)[sub_message.key] = sub_message.value
+
+  @staticmethod
+  def _IsProto3Syntax(message):
+    message_descriptor = message.DESCRIPTOR
+    return (hasattr(message_descriptor, 'syntax') and
+            message_descriptor.syntax == 'proto3')
+
+  def _MergeScalarField(self, tokenizer, message, field):
+    """Merges a single scalar field into a message.
+
+    Args:
+      tokenizer: A tokenizer to parse the field value.
+      message: A protocol message to record the data.
+      field: The descriptor of the field to be merged.
+
+    Raises:
+      ParseError: In case of text parsing problems.
+      RuntimeError: On runtime errors.
+    """
+    _ = self.allow_unknown_extension
+    value = None
+
+    if field.type in (descriptor.FieldDescriptor.TYPE_INT32,
+                      descriptor.FieldDescriptor.TYPE_SINT32,
+                      descriptor.FieldDescriptor.TYPE_SFIXED32):
+      value = _ConsumeInt32(tokenizer)
+    elif field.type in (descriptor.FieldDescriptor.TYPE_INT64,
+                        descriptor.FieldDescriptor.TYPE_SINT64,
+                        descriptor.FieldDescriptor.TYPE_SFIXED64):
+      value = _ConsumeInt64(tokenizer)
+    elif field.type in (descriptor.FieldDescriptor.TYPE_UINT32,
+                        descriptor.FieldDescriptor.TYPE_FIXED32):
+      value = _ConsumeUint32(tokenizer)
+    elif field.type in (descriptor.FieldDescriptor.TYPE_UINT64,
+                        descriptor.FieldDescriptor.TYPE_FIXED64):
+      value = _ConsumeUint64(tokenizer)
+    elif field.type in (descriptor.FieldDescriptor.TYPE_FLOAT,
+                        descriptor.FieldDescriptor.TYPE_DOUBLE):
+      value = tokenizer.ConsumeFloat()
+    elif field.type == descriptor.FieldDescriptor.TYPE_BOOL:
+      value = tokenizer.ConsumeBool()
+    elif field.type == descriptor.FieldDescriptor.TYPE_STRING:
+      value = tokenizer.ConsumeString()
+    elif field.type == descriptor.FieldDescriptor.TYPE_BYTES:
+      value = tokenizer.ConsumeByteString()
+    elif field.type == descriptor.FieldDescriptor.TYPE_ENUM:
+      value = tokenizer.ConsumeEnum(field)
+    else:
+      raise RuntimeError('Unknown field type %d' % field.type)
+
+    if field.label == descriptor.FieldDescriptor.LABEL_REPEATED:
+      if field.is_extension:
+        message.Extensions[field].append(value)
+      else:
+        getattr(message, field.name).append(value)
+    else:
+      if field.is_extension:
+        if (not self._allow_multiple_scalars and
+            not self._IsProto3Syntax(message) and
+            message.HasExtension(field)):
+          raise tokenizer.ParseErrorPreviousToken(
+              'Message type "%s" should not have multiple "%s" extensions.' %
+              (message.DESCRIPTOR.full_name, field.full_name))
+        else:
+          message.Extensions[field] = value
+      else:
+        duplicate_error = False
+        if not self._allow_multiple_scalars:
+          if self._IsProto3Syntax(message):
+            # Proto3 doesn't represent presence so we try best effort to check
+            # multiple scalars by compare to default values.
+            duplicate_error = bool(getattr(message, field.name))
+          else:
+            duplicate_error = message.HasField(field.name)
+
+        if duplicate_error:
+          raise tokenizer.ParseErrorPreviousToken(
+              'Message type "%s" should not have multiple "%s" fields.' %
+              (message.DESCRIPTOR.full_name, field.name))
+        else:
+          setattr(message, field.name, value)
+
+
+def _SkipFieldContents(tokenizer):
+  """Skips over contents (value or message) of a field.
+
+  Args:
+    tokenizer: A tokenizer to parse the field name and values.
+  """
+  # Try to guess the type of this field.
+  # If this field is not a message, there should be a ":" between the
+  # field name and the field value and also the field value should not
+  # start with "{" or "<" which indicates the beginning of a message body.
+  # If there is no ":" or there is a "{" or "<" after ":", this field has
+  # to be a message or the input is ill-formed.
+  if tokenizer.TryConsume(':') and not tokenizer.LookingAt(
+      '{') and not tokenizer.LookingAt('<'):
+    _SkipFieldValue(tokenizer)
+  else:
+    _SkipFieldMessage(tokenizer)
+
+
+def _SkipField(tokenizer):
+  """Skips over a complete field (name and value/message).
+
+  Args:
+    tokenizer: A tokenizer to parse the field name and values.
+  """
+  if tokenizer.TryConsume('['):
+    # Consume extension name.
+    tokenizer.ConsumeIdentifier()
+    while tokenizer.TryConsume('.'):
+      tokenizer.ConsumeIdentifier()
+    tokenizer.Consume(']')
+  else:
+    tokenizer.ConsumeIdentifierOrNumber()
+
+  _SkipFieldContents(tokenizer)
+
+  # For historical reasons, fields may optionally be separated by commas or
+  # semicolons.
+  if not tokenizer.TryConsume(','):
+    tokenizer.TryConsume(';')
+
+
+def _SkipFieldMessage(tokenizer):
+  """Skips over a field message.
+
+  Args:
+    tokenizer: A tokenizer to parse the field name and values.
+  """
+
+  if tokenizer.TryConsume('<'):
+    delimiter = '>'
+  else:
+    tokenizer.Consume('{')
+    delimiter = '}'
+
+  while not tokenizer.LookingAt('>') and not tokenizer.LookingAt('}'):
+    _SkipField(tokenizer)
+
+  tokenizer.Consume(delimiter)
+
+
+def _SkipFieldValue(tokenizer):
+  """Skips over a field value.
+
+  Args:
+    tokenizer: A tokenizer to parse the field name and values.
+
+  Raises:
+    ParseError: In case an invalid field value is found.
+  """
+  # String/bytes tokens can come in multiple adjacent string literals.
+  # If we can consume one, consume as many as we can.
+  if tokenizer.TryConsumeByteString():
+    while tokenizer.TryConsumeByteString():
+      pass
+    return
+
+  if (not tokenizer.TryConsumeIdentifier() and
+      not _TryConsumeInt64(tokenizer) and not _TryConsumeUint64(tokenizer) and
+      not tokenizer.TryConsumeFloat()):
+    raise ParseError('Invalid field value: ' + tokenizer.token)
+
+
+class Tokenizer(object):
+  """Protocol buffer text representation tokenizer.
+
+  This class handles the lower level string parsing by splitting it into
+  meaningful tokens.
+
+  It was directly ported from the Java protocol buffer API.
+  """
+
+  _WHITESPACE = re.compile(r'\s+')
+  _COMMENT = re.compile(r'(\s*#.*$)', re.MULTILINE)
+  _WHITESPACE_OR_COMMENT = re.compile(r'(\s|(#.*$))+', re.MULTILINE)
+  _TOKEN = re.compile('|'.join([
+      r'[a-zA-Z_][0-9a-zA-Z_+-]*',  # an identifier
+      r'([0-9+-]|(\.[0-9]))[0-9a-zA-Z_.+-]*',  # a number
+  ] + [  # quoted str for each quote mark
+      # Avoid backtracking! https://stackoverflow.com/a/844267
+      r'{qt}[^{qt}\n\\]*((\\.)+[^{qt}\n\\]*)*({qt}|\\?$)'.format(qt=mark)
+      for mark in _QUOTES
+  ]))
+
+  _IDENTIFIER = re.compile(r'[^\d\W]\w*')
+  _IDENTIFIER_OR_NUMBER = re.compile(r'\w+')
+
+  def __init__(self, lines, skip_comments=True):
+    self._position = 0
+    self._line = -1
+    self._column = 0
+    self._token_start = None
+    self.token = ''
+    self._lines = iter(lines)
+    self._current_line = ''
+    self._previous_line = 0
+    self._previous_column = 0
+    self._more_lines = True
+    self._skip_comments = skip_comments
+    self._whitespace_pattern = (skip_comments and self._WHITESPACE_OR_COMMENT
+                                or self._WHITESPACE)
+    self._SkipWhitespace()
+    self.NextToken()
+
+  def LookingAt(self, token):
+    return self.token == token
+
+  def AtEnd(self):
+    """Checks the end of the text was reached.
+
+    Returns:
+      True iff the end was reached.
+    """
+    return not self.token
+
+  def _PopLine(self):
+    while len(self._current_line) <= self._column:
+      try:
+        self._current_line = next(self._lines)
+      except StopIteration:
+        self._current_line = ''
+        self._more_lines = False
+        return
+      else:
+        self._line += 1
+        self._column = 0
+
+  def _SkipWhitespace(self):
+    while True:
+      self._PopLine()
+      match = self._whitespace_pattern.match(self._current_line, self._column)
+      if not match:
+        break
+      length = len(match.group(0))
+      self._column += length
+
+  def TryConsume(self, token):
+    """Tries to consume a given piece of text.
+
+    Args:
+      token: Text to consume.
+
+    Returns:
+      True iff the text was consumed.
+    """
+    if self.token == token:
+      self.NextToken()
+      return True
+    return False
+
+  def Consume(self, token):
+    """Consumes a piece of text.
+
+    Args:
+      token: Text to consume.
+
+    Raises:
+      ParseError: If the text couldn't be consumed.
+    """
+    if not self.TryConsume(token):
+      raise self.ParseError('Expected "%s".' % token)
+
+  def ConsumeComment(self):
+    result = self.token
+    if not self._COMMENT.match(result):
+      raise self.ParseError('Expected comment.')
+    self.NextToken()
+    return result
+
+  def ConsumeCommentOrTrailingComment(self):
+    """Consumes a comment, returns a 2-tuple (trailing bool, comment str)."""
+
+    # Tokenizer initializes _previous_line and _previous_column to 0. As the
+    # tokenizer starts, it looks like there is a previous token on the line.
+    just_started = self._line == 0 and self._column == 0
+
+    before_parsing = self._previous_line
+    comment = self.ConsumeComment()
+
+    # A trailing comment is a comment on the same line than the previous token.
+    trailing = (self._previous_line == before_parsing
+                and not just_started)
+
+    return trailing, comment
+
+  def TryConsumeIdentifier(self):
+    try:
+      self.ConsumeIdentifier()
+      return True
+    except ParseError:
+      return False
+
+  def ConsumeIdentifier(self):
+    """Consumes protocol message field identifier.
+
+    Returns:
+      Identifier string.
+
+    Raises:
+      ParseError: If an identifier couldn't be consumed.
+    """
+    result = self.token
+    if not self._IDENTIFIER.match(result):
+      raise self.ParseError('Expected identifier.')
+    self.NextToken()
+    return result
+
+  def TryConsumeIdentifierOrNumber(self):
+    try:
+      self.ConsumeIdentifierOrNumber()
+      return True
+    except ParseError:
+      return False
+
+  def ConsumeIdentifierOrNumber(self):
+    """Consumes protocol message field identifier.
+
+    Returns:
+      Identifier string.
+
+    Raises:
+      ParseError: If an identifier couldn't be consumed.
+    """
+    result = self.token
+    if not self._IDENTIFIER_OR_NUMBER.match(result):
+      raise self.ParseError('Expected identifier or number, got %s.' % result)
+    self.NextToken()
+    return result
+
+  def TryConsumeInteger(self):
+    try:
+      # Note: is_long only affects value type, not whether an error is raised.
+      self.ConsumeInteger()
+      return True
+    except ParseError:
+      return False
+
+  def ConsumeInteger(self, is_long=False):
+    """Consumes an integer number.
+
+    Args:
+      is_long: True if the value should be returned as a long integer.
+    Returns:
+      The integer parsed.
+
+    Raises:
+      ParseError: If an integer couldn't be consumed.
+    """
+    try:
+      result = _ParseAbstractInteger(self.token, is_long=is_long)
+    except ValueError as e:
+      raise self.ParseError(str(e))
+    self.NextToken()
+    return result
+
+  def TryConsumeFloat(self):
+    try:
+      self.ConsumeFloat()
+      return True
+    except ParseError:
+      return False
+
+  def ConsumeFloat(self):
+    """Consumes an floating point number.
+
+    Returns:
+      The number parsed.
+
+    Raises:
+      ParseError: If a floating point number couldn't be consumed.
+    """
+    try:
+      result = ParseFloat(self.token)
+    except ValueError as e:
+      raise self.ParseError(str(e))
+    self.NextToken()
+    return result
+
+  def ConsumeBool(self):
+    """Consumes a boolean value.
+
+    Returns:
+      The bool parsed.
+
+    Raises:
+      ParseError: If a boolean value couldn't be consumed.
+    """
+    try:
+      result = ParseBool(self.token)
+    except ValueError as e:
+      raise self.ParseError(str(e))
+    self.NextToken()
+    return result
+
+  def TryConsumeByteString(self):
+    try:
+      self.ConsumeByteString()
+      return True
+    except ParseError:
+      return False
+
+  def ConsumeString(self):
+    """Consumes a string value.
+
+    Returns:
+      The string parsed.
+
+    Raises:
+      ParseError: If a string value couldn't be consumed.
+    """
+    the_bytes = self.ConsumeByteString()
+    try:
+      return six.text_type(the_bytes, 'utf-8')
+    except UnicodeDecodeError as e:
+      raise self._StringParseError(e)
+
+  def ConsumeByteString(self):
+    """Consumes a byte array value.
+
+    Returns:
+      The array parsed (as a string).
+
+    Raises:
+      ParseError: If a byte array value couldn't be consumed.
+    """
+    the_list = [self._ConsumeSingleByteString()]
+    while self.token and self.token[0] in _QUOTES:
+      the_list.append(self._ConsumeSingleByteString())
+    return b''.join(the_list)
+
+  def _ConsumeSingleByteString(self):
+    """Consume one token of a string literal.
+
+    String literals (whether bytes or text) can come in multiple adjacent
+    tokens which are automatically concatenated, like in C or Python.  This
+    method only consumes one token.
+
+    Returns:
+      The token parsed.
+    Raises:
+      ParseError: When the wrong format data is found.
+    """
+    text = self.token
+    if len(text) < 1 or text[0] not in _QUOTES:
+      raise self.ParseError('Expected string but found: %r' % (text,))
+
+    if len(text) < 2 or text[-1] != text[0]:
+      raise self.ParseError('String missing ending quote: %r' % (text,))
+
+    try:
+      result = text_encoding.CUnescape(text[1:-1])
+    except ValueError as e:
+      raise self.ParseError(str(e))
+    self.NextToken()
+    return result
+
+  def ConsumeEnum(self, field):
+    try:
+      result = ParseEnum(field, self.token)
+    except ValueError as e:
+      raise self.ParseError(str(e))
+    self.NextToken()
+    return result
+
+  def ParseErrorPreviousToken(self, message):
+    """Creates and *returns* a ParseError for the previously read token.
+
+    Args:
+      message: A message to set for the exception.
+
+    Returns:
+      A ParseError instance.
+    """
+    return ParseError(message, self._previous_line + 1,
+                      self._previous_column + 1)
+
+  def ParseError(self, message):
+    """Creates and *returns* a ParseError for the current token."""
+    return ParseError('\'' + self._current_line + '\': ' + message,
+                      self._line + 1, self._column + 1)
+
+  def _StringParseError(self, e):
+    return self.ParseError('Couldn\'t parse string: ' + str(e))
+
+  def NextToken(self):
+    """Reads the next meaningful token."""
+    self._previous_line = self._line
+    self._previous_column = self._column
+
+    self._column += len(self.token)
+    self._SkipWhitespace()
+
+    if not self._more_lines:
+      self.token = ''
+      return
+
+    match = self._TOKEN.match(self._current_line, self._column)
+    if not match and not self._skip_comments:
+      match = self._COMMENT.match(self._current_line, self._column)
+    if match:
+      token = match.group(0)
+      self.token = token
+    else:
+      self.token = self._current_line[self._column]
+
+# Aliased so it can still be accessed by current visibility violators.
+# TODO(dbarnett): Migrate violators to textformat_tokenizer.
+_Tokenizer = Tokenizer  # pylint: disable=invalid-name
+
+
+def _ConsumeInt32(tokenizer):
+  """Consumes a signed 32bit integer number from tokenizer.
+
+  Args:
+    tokenizer: A tokenizer used to parse the number.
+
+  Returns:
+    The integer parsed.
+
+  Raises:
+    ParseError: If a signed 32bit integer couldn't be consumed.
+  """
+  return _ConsumeInteger(tokenizer, is_signed=True, is_long=False)
+
+
+def _ConsumeUint32(tokenizer):
+  """Consumes an unsigned 32bit integer number from tokenizer.
+
+  Args:
+    tokenizer: A tokenizer used to parse the number.
+
+  Returns:
+    The integer parsed.
+
+  Raises:
+    ParseError: If an unsigned 32bit integer couldn't be consumed.
+  """
+  return _ConsumeInteger(tokenizer, is_signed=False, is_long=False)
+
+
+def _TryConsumeInt64(tokenizer):
+  try:
+    _ConsumeInt64(tokenizer)
+    return True
+  except ParseError:
+    return False
+
+
+def _ConsumeInt64(tokenizer):
+  """Consumes a signed 32bit integer number from tokenizer.
+
+  Args:
+    tokenizer: A tokenizer used to parse the number.
+
+  Returns:
+    The integer parsed.
+
+  Raises:
+    ParseError: If a signed 32bit integer couldn't be consumed.
+  """
+  return _ConsumeInteger(tokenizer, is_signed=True, is_long=True)
+
+
+def _TryConsumeUint64(tokenizer):
+  try:
+    _ConsumeUint64(tokenizer)
+    return True
+  except ParseError:
+    return False
+
+
+def _ConsumeUint64(tokenizer):
+  """Consumes an unsigned 64bit integer number from tokenizer.
+
+  Args:
+    tokenizer: A tokenizer used to parse the number.
+
+  Returns:
+    The integer parsed.
+
+  Raises:
+    ParseError: If an unsigned 64bit integer couldn't be consumed.
+  """
+  return _ConsumeInteger(tokenizer, is_signed=False, is_long=True)
+
+
+def _TryConsumeInteger(tokenizer, is_signed=False, is_long=False):
+  try:
+    _ConsumeInteger(tokenizer, is_signed=is_signed, is_long=is_long)
+    return True
+  except ParseError:
+    return False
+
+
+def _ConsumeInteger(tokenizer, is_signed=False, is_long=False):
+  """Consumes an integer number from tokenizer.
+
+  Args:
+    tokenizer: A tokenizer used to parse the number.
+    is_signed: True if a signed integer must be parsed.
+    is_long: True if a long integer must be parsed.
+
+  Returns:
+    The integer parsed.
+
+  Raises:
+    ParseError: If an integer with given characteristics couldn't be consumed.
+  """
+  try:
+    result = ParseInteger(tokenizer.token, is_signed=is_signed, is_long=is_long)
+  except ValueError as e:
+    raise tokenizer.ParseError(str(e))
+  tokenizer.NextToken()
+  return result
+
+
+def ParseInteger(text, is_signed=False, is_long=False):
+  """Parses an integer.
+
+  Args:
+    text: The text to parse.
+    is_signed: True if a signed integer must be parsed.
+    is_long: True if a long integer must be parsed.
+
+  Returns:
+    The integer value.
+
+  Raises:
+    ValueError: Thrown Iff the text is not a valid integer.
+  """
+  # Do the actual parsing. Exception handling is propagated to caller.
+  result = _ParseAbstractInteger(text, is_long=is_long)
+
+  # Check if the integer is sane. Exceptions handled by callers.
+  checker = _INTEGER_CHECKERS[2 * int(is_long) + int(is_signed)]
+  checker.CheckValue(result)
+  return result
+
+
+def _ParseAbstractInteger(text, is_long=False):
+  """Parses an integer without checking size/signedness.
+
+  Args:
+    text: The text to parse.
+    is_long: True if the value should be returned as a long integer.
+
+  Returns:
+    The integer value.
+
+  Raises:
+    ValueError: Thrown Iff the text is not a valid integer.
+  """
+  # Do the actual parsing. Exception handling is propagated to caller.
+  orig_text = text
+  c_octal_match = re.match(r'(-?)0(\d+)$', text)
+  if c_octal_match:
+    # Python 3 no longer supports 0755 octal syntax without the 'o', so
+    # we always use the '0o' prefix for multi-digit numbers starting with 0.
+    text = c_octal_match.group(1) + '0o' + c_octal_match.group(2)
+  try:
+    # We force 32-bit values to int and 64-bit values to long to make
+    # alternate implementations where the distinction is more significant
+    # (e.g. the C++ implementation) simpler.
+    if is_long:
+      return long(text, 0)
+    else:
+      return int(text, 0)
+  except ValueError:
+    raise ValueError('Couldn\'t parse integer: %s' % orig_text)
+
+
+def ParseFloat(text):
+  """Parse a floating point number.
+
+  Args:
+    text: Text to parse.
+
+  Returns:
+    The number parsed.
+
+  Raises:
+    ValueError: If a floating point number couldn't be parsed.
+  """
+  try:
+    # Assume Python compatible syntax.
+    return float(text)
+  except ValueError:
+    # Check alternative spellings.
+    if _FLOAT_INFINITY.match(text):
+      if text[0] == '-':
+        return float('-inf')
+      else:
+        return float('inf')
+    elif _FLOAT_NAN.match(text):
+      return float('nan')
+    else:
+      # assume '1.0f' format
+      try:
+        return float(text.rstrip('f'))
+      except ValueError:
+        raise ValueError('Couldn\'t parse float: %s' % text)
+
+
+def ParseBool(text):
+  """Parse a boolean value.
+
+  Args:
+    text: Text to parse.
+
+  Returns:
+    Boolean values parsed
+
+  Raises:
+    ValueError: If text is not a valid boolean.
+  """
+  if text in ('true', 't', '1', 'True'):
+    return True
+  elif text in ('false', 'f', '0', 'False'):
+    return False
+  else:
+    raise ValueError('Expected "true" or "false".')
+
+
+def ParseEnum(field, value):
+  """Parse an enum value.
+
+  The value can be specified by a number (the enum value), or by
+  a string literal (the enum name).
+
+  Args:
+    field: Enum field descriptor.
+    value: String value.
+
+  Returns:
+    Enum value number.
+
+  Raises:
+    ValueError: If the enum value could not be parsed.
+  """
+  enum_descriptor = field.enum_type
+  try:
+    number = int(value, 0)
+  except ValueError:
+    # Identifier.
+    enum_value = enum_descriptor.values_by_name.get(value, None)
+    if enum_value is None:
+      raise ValueError('Enum type "%s" has no value named %s.' %
+                       (enum_descriptor.full_name, value))
+  else:
+    # Numeric value.
+    if hasattr(field.file, 'syntax'):
+      # Attribute is checked for compatibility.
+      if field.file.syntax == 'proto3':
+        # Proto3 accept numeric unknown enums.
+        return number
+    enum_value = enum_descriptor.values_by_number.get(number, None)
+    if enum_value is None:
+      raise ValueError('Enum type "%s" has no value with number %d.' %
+                       (enum_descriptor.full_name, number))
+  return enum_value.number
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/timestamp_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/timestamp_pb2.py
new file mode 100644
index 0000000..aacf577
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/timestamp_pb2.py
@@ -0,0 +1,78 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/timestamp.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/timestamp.proto',
+  package='google.protobuf',
+  syntax='proto3',
+  serialized_options=b'\n\023com.google.protobufB\016TimestampProtoP\001Z+github.com/golang/protobuf/ptypes/timestamp\370\001\001\242\002\003GPB\252\002\036Google.Protobuf.WellKnownTypes',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\x1fgoogle/protobuf/timestamp.proto\x12\x0fgoogle.protobuf\"+\n\tTimestamp\x12\x0f\n\x07seconds\x18\x01 \x01(\x03\x12\r\n\x05nanos\x18\x02 \x01(\x05\x42~\n\x13\x63om.google.protobufB\x0eTimestampProtoP\x01Z+github.com/golang/protobuf/ptypes/timestamp\xf8\x01\x01\xa2\x02\x03GPB\xaa\x02\x1eGoogle.Protobuf.WellKnownTypesb\x06proto3'
+)
+
+
+
+
+_TIMESTAMP = _descriptor.Descriptor(
+  name='Timestamp',
+  full_name='google.protobuf.Timestamp',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='seconds', full_name='google.protobuf.Timestamp.seconds', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nanos', full_name='google.protobuf.Timestamp.nanos', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=52,
+  serialized_end=95,
+)
+
+DESCRIPTOR.message_types_by_name['Timestamp'] = _TIMESTAMP
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Timestamp = _reflection.GeneratedProtocolMessageType('Timestamp', (_message.Message,), {
+  'DESCRIPTOR' : _TIMESTAMP,
+  '__module__' : 'google.protobuf.timestamp_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Timestamp)
+  })
+_sym_db.RegisterMessage(Timestamp)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/type_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/type_pb2.py
new file mode 100644
index 0000000..acca15f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/type_pb2.py
@@ -0,0 +1,573 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/type.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import any_pb2 as google_dot_protobuf_dot_any__pb2
+from google.protobuf import source_context_pb2 as google_dot_protobuf_dot_source__context__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/type.proto',
+  package='google.protobuf',
+  syntax='proto3',
+  serialized_options=b'\n\023com.google.protobufB\tTypeProtoP\001Z/google.golang.org/genproto/protobuf/ptype;ptype\370\001\001\242\002\003GPB\252\002\036Google.Protobuf.WellKnownTypes',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\x1agoogle/protobuf/type.proto\x12\x0fgoogle.protobuf\x1a\x19google/protobuf/any.proto\x1a$google/protobuf/source_context.proto\"\xd7\x01\n\x04Type\x12\x0c\n\x04name\x18\x01 \x01(\t\x12&\n\x06\x66ields\x18\x02 \x03(\x0b\x32\x16.google.protobuf.Field\x12\x0e\n\x06oneofs\x18\x03 \x03(\t\x12(\n\x07options\x18\x04 \x03(\x0b\x32\x17.google.protobuf.Option\x12\x36\n\x0esource_context\x18\x05 \x01(\x0b\x32\x1e.google.protobuf.SourceContext\x12\'\n\x06syntax\x18\x06 \x01(\x0e\x32\x17.google.protobuf.Syntax\"\xd5\x05\n\x05\x46ield\x12)\n\x04kind\x18\x01 \x01(\x0e\x32\x1b.google.protobuf.Field.Kind\x12\x37\n\x0b\x63\x61rdinality\x18\x02 \x01(\x0e\x32\".google.protobuf.Field.Cardinality\x12\x0e\n\x06number\x18\x03 \x01(\x05\x12\x0c\n\x04name\x18\x04 \x01(\t\x12\x10\n\x08type_url\x18\x06 \x01(\t\x12\x13\n\x0boneof_index\x18\x07 \x01(\x05\x12\x0e\n\x06packed\x18\x08 \x01(\x08\x12(\n\x07options\x18\t \x03(\x0b\x32\x17.google.protobuf.Option\x12\x11\n\tjson_name\x18\n \x01(\t\x12\x15\n\rdefault_value\x18\x0b \x01(\t\"\xc8\x02\n\x04Kind\x12\x10\n\x0cTYPE_UNKNOWN\x10\x00\x12\x0f\n\x0bTYPE_DOUBLE\x10\x01\x12\x0e\n\nTYPE_FLOAT\x10\x02\x12\x0e\n\nTYPE_INT64\x10\x03\x12\x0f\n\x0bTYPE_UINT64\x10\x04\x12\x0e\n\nTYPE_INT32\x10\x05\x12\x10\n\x0cTYPE_FIXED64\x10\x06\x12\x10\n\x0cTYPE_FIXED32\x10\x07\x12\r\n\tTYPE_BOOL\x10\x08\x12\x0f\n\x0bTYPE_STRING\x10\t\x12\x0e\n\nTYPE_GROUP\x10\n\x12\x10\n\x0cTYPE_MESSAGE\x10\x0b\x12\x0e\n\nTYPE_BYTES\x10\x0c\x12\x0f\n\x0bTYPE_UINT32\x10\r\x12\r\n\tTYPE_ENUM\x10\x0e\x12\x11\n\rTYPE_SFIXED32\x10\x0f\x12\x11\n\rTYPE_SFIXED64\x10\x10\x12\x0f\n\x0bTYPE_SINT32\x10\x11\x12\x0f\n\x0bTYPE_SINT64\x10\x12\"t\n\x0b\x43\x61rdinality\x12\x17\n\x13\x43\x41RDINALITY_UNKNOWN\x10\x00\x12\x18\n\x14\x43\x41RDINALITY_OPTIONAL\x10\x01\x12\x18\n\x14\x43\x41RDINALITY_REQUIRED\x10\x02\x12\x18\n\x14\x43\x41RDINALITY_REPEATED\x10\x03\"\xce\x01\n\x04\x45num\x12\x0c\n\x04name\x18\x01 \x01(\t\x12-\n\tenumvalue\x18\x02 \x03(\x0b\x32\x1a.google.protobuf.EnumValue\x12(\n\x07options\x18\x03 \x03(\x0b\x32\x17.google.protobuf.Option\x12\x36\n\x0esource_context\x18\x04 \x01(\x0b\x32\x1e.google.protobuf.SourceContext\x12\'\n\x06syntax\x18\x05 \x01(\x0e\x32\x17.google.protobuf.Syntax\"S\n\tEnumValue\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\x0e\n\x06number\x18\x02 \x01(\x05\x12(\n\x07options\x18\x03 \x03(\x0b\x32\x17.google.protobuf.Option\";\n\x06Option\x12\x0c\n\x04name\x18\x01 \x01(\t\x12#\n\x05value\x18\x02 \x01(\x0b\x32\x14.google.protobuf.Any*.\n\x06Syntax\x12\x11\n\rSYNTAX_PROTO2\x10\x00\x12\x11\n\rSYNTAX_PROTO3\x10\x01\x42}\n\x13\x63om.google.protobufB\tTypeProtoP\x01Z/google.golang.org/genproto/protobuf/ptype;ptype\xf8\x01\x01\xa2\x02\x03GPB\xaa\x02\x1eGoogle.Protobuf.WellKnownTypesb\x06proto3'
+  ,
+  dependencies=[google_dot_protobuf_dot_any__pb2.DESCRIPTOR,google_dot_protobuf_dot_source__context__pb2.DESCRIPTOR,])
+
+_SYNTAX = _descriptor.EnumDescriptor(
+  name='Syntax',
+  full_name='google.protobuf.Syntax',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='SYNTAX_PROTO2', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='SYNTAX_PROTO3', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=1413,
+  serialized_end=1459,
+)
+_sym_db.RegisterEnumDescriptor(_SYNTAX)
+
+Syntax = enum_type_wrapper.EnumTypeWrapper(_SYNTAX)
+SYNTAX_PROTO2 = 0
+SYNTAX_PROTO3 = 1
+
+
+_FIELD_KIND = _descriptor.EnumDescriptor(
+  name='Kind',
+  full_name='google.protobuf.Field.Kind',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_UNKNOWN', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_DOUBLE', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_FLOAT', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_INT64', index=3, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_UINT64', index=4, number=4,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_INT32', index=5, number=5,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_FIXED64', index=6, number=6,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_FIXED32', index=7, number=7,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_BOOL', index=8, number=8,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_STRING', index=9, number=9,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_GROUP', index=10, number=10,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_MESSAGE', index=11, number=11,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_BYTES', index=12, number=12,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_UINT32', index=13, number=13,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_ENUM', index=14, number=14,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_SFIXED32', index=15, number=15,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_SFIXED64', index=16, number=16,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_SINT32', index=17, number=17,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TYPE_SINT64', index=18, number=18,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=610,
+  serialized_end=938,
+)
+_sym_db.RegisterEnumDescriptor(_FIELD_KIND)
+
+_FIELD_CARDINALITY = _descriptor.EnumDescriptor(
+  name='Cardinality',
+  full_name='google.protobuf.Field.Cardinality',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='CARDINALITY_UNKNOWN', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='CARDINALITY_OPTIONAL', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='CARDINALITY_REQUIRED', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='CARDINALITY_REPEATED', index=3, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=940,
+  serialized_end=1056,
+)
+_sym_db.RegisterEnumDescriptor(_FIELD_CARDINALITY)
+
+
+_TYPE = _descriptor.Descriptor(
+  name='Type',
+  full_name='google.protobuf.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.Type.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='fields', full_name='google.protobuf.Type.fields', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneofs', full_name='google.protobuf.Type.oneofs', index=2,
+      number=3, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.Type.options', index=3,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='source_context', full_name='google.protobuf.Type.source_context', index=4,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='syntax', full_name='google.protobuf.Type.syntax', index=5,
+      number=6, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=113,
+  serialized_end=328,
+)
+
+
+_FIELD = _descriptor.Descriptor(
+  name='Field',
+  full_name='google.protobuf.Field',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='kind', full_name='google.protobuf.Field.kind', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='cardinality', full_name='google.protobuf.Field.cardinality', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='number', full_name='google.protobuf.Field.number', index=2,
+      number=3, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.Field.name', index=3,
+      number=4, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='type_url', full_name='google.protobuf.Field.type_url', index=4,
+      number=6, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_index', full_name='google.protobuf.Field.oneof_index', index=5,
+      number=7, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed', full_name='google.protobuf.Field.packed', index=6,
+      number=8, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.Field.options', index=7,
+      number=9, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='json_name', full_name='google.protobuf.Field.json_name', index=8,
+      number=10, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_value', full_name='google.protobuf.Field.default_value', index=9,
+      number=11, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _FIELD_KIND,
+    _FIELD_CARDINALITY,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=331,
+  serialized_end=1056,
+)
+
+
+_ENUM = _descriptor.Descriptor(
+  name='Enum',
+  full_name='google.protobuf.Enum',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.Enum.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='enumvalue', full_name='google.protobuf.Enum.enumvalue', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.Enum.options', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='source_context', full_name='google.protobuf.Enum.source_context', index=3,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='syntax', full_name='google.protobuf.Enum.syntax', index=4,
+      number=5, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1059,
+  serialized_end=1265,
+)
+
+
+_ENUMVALUE = _descriptor.Descriptor(
+  name='EnumValue',
+  full_name='google.protobuf.EnumValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.EnumValue.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='number', full_name='google.protobuf.EnumValue.number', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='options', full_name='google.protobuf.EnumValue.options', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1267,
+  serialized_end=1350,
+)
+
+
+_OPTION = _descriptor.Descriptor(
+  name='Option',
+  full_name='google.protobuf.Option',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='google.protobuf.Option.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.Option.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1352,
+  serialized_end=1411,
+)
+
+_TYPE.fields_by_name['fields'].message_type = _FIELD
+_TYPE.fields_by_name['options'].message_type = _OPTION
+_TYPE.fields_by_name['source_context'].message_type = google_dot_protobuf_dot_source__context__pb2._SOURCECONTEXT
+_TYPE.fields_by_name['syntax'].enum_type = _SYNTAX
+_FIELD.fields_by_name['kind'].enum_type = _FIELD_KIND
+_FIELD.fields_by_name['cardinality'].enum_type = _FIELD_CARDINALITY
+_FIELD.fields_by_name['options'].message_type = _OPTION
+_FIELD_KIND.containing_type = _FIELD
+_FIELD_CARDINALITY.containing_type = _FIELD
+_ENUM.fields_by_name['enumvalue'].message_type = _ENUMVALUE
+_ENUM.fields_by_name['options'].message_type = _OPTION
+_ENUM.fields_by_name['source_context'].message_type = google_dot_protobuf_dot_source__context__pb2._SOURCECONTEXT
+_ENUM.fields_by_name['syntax'].enum_type = _SYNTAX
+_ENUMVALUE.fields_by_name['options'].message_type = _OPTION
+_OPTION.fields_by_name['value'].message_type = google_dot_protobuf_dot_any__pb2._ANY
+DESCRIPTOR.message_types_by_name['Type'] = _TYPE
+DESCRIPTOR.message_types_by_name['Field'] = _FIELD
+DESCRIPTOR.message_types_by_name['Enum'] = _ENUM
+DESCRIPTOR.message_types_by_name['EnumValue'] = _ENUMVALUE
+DESCRIPTOR.message_types_by_name['Option'] = _OPTION
+DESCRIPTOR.enum_types_by_name['Syntax'] = _SYNTAX
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Type = _reflection.GeneratedProtocolMessageType('Type', (_message.Message,), {
+  'DESCRIPTOR' : _TYPE,
+  '__module__' : 'google.protobuf.type_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Type)
+  })
+_sym_db.RegisterMessage(Type)
+
+Field = _reflection.GeneratedProtocolMessageType('Field', (_message.Message,), {
+  'DESCRIPTOR' : _FIELD,
+  '__module__' : 'google.protobuf.type_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Field)
+  })
+_sym_db.RegisterMessage(Field)
+
+Enum = _reflection.GeneratedProtocolMessageType('Enum', (_message.Message,), {
+  'DESCRIPTOR' : _ENUM,
+  '__module__' : 'google.protobuf.type_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Enum)
+  })
+_sym_db.RegisterMessage(Enum)
+
+EnumValue = _reflection.GeneratedProtocolMessageType('EnumValue', (_message.Message,), {
+  'DESCRIPTOR' : _ENUMVALUE,
+  '__module__' : 'google.protobuf.type_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.EnumValue)
+  })
+_sym_db.RegisterMessage(EnumValue)
+
+Option = _reflection.GeneratedProtocolMessageType('Option', (_message.Message,), {
+  'DESCRIPTOR' : _OPTION,
+  '__module__' : 'google.protobuf.type_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Option)
+  })
+_sym_db.RegisterMessage(Option)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_arena_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_arena_pb2.py
new file mode 100644
index 0000000..0717976
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_arena_pb2.py
@@ -0,0 +1,112 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/unittest_arena.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/unittest_arena.proto',
+  package='proto2_arena_unittest',
+  syntax='proto2',
+  serialized_options=b'\370\001\001',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n$google/protobuf/unittest_arena.proto\x12\x15proto2_arena_unittest\"\x1a\n\rNestedMessage\x12\t\n\x01\x64\x18\x01 \x01(\x05\"U\n\x0c\x41renaMessage\x12\x45\n\x17repeated_nested_message\x18\x01 \x03(\x0b\x32$.proto2_arena_unittest.NestedMessageB\x03\xf8\x01\x01'
+)
+
+
+
+
+_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='proto2_arena_unittest.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='d', full_name='proto2_arena_unittest.NestedMessage.d', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=63,
+  serialized_end=89,
+)
+
+
+_ARENAMESSAGE = _descriptor.Descriptor(
+  name='ArenaMessage',
+  full_name='proto2_arena_unittest.ArenaMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_message', full_name='proto2_arena_unittest.ArenaMessage.repeated_nested_message', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=91,
+  serialized_end=176,
+)
+
+_ARENAMESSAGE.fields_by_name['repeated_nested_message'].message_type = _NESTEDMESSAGE
+DESCRIPTOR.message_types_by_name['NestedMessage'] = _NESTEDMESSAGE
+DESCRIPTOR.message_types_by_name['ArenaMessage'] = _ARENAMESSAGE
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+NestedMessage = _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+  'DESCRIPTOR' : _NESTEDMESSAGE,
+  '__module__' : 'google.protobuf.unittest_arena_pb2'
+  # @@protoc_insertion_point(class_scope:proto2_arena_unittest.NestedMessage)
+  })
+_sym_db.RegisterMessage(NestedMessage)
+
+ArenaMessage = _reflection.GeneratedProtocolMessageType('ArenaMessage', (_message.Message,), {
+  'DESCRIPTOR' : _ARENAMESSAGE,
+  '__module__' : 'google.protobuf.unittest_arena_pb2'
+  # @@protoc_insertion_point(class_scope:proto2_arena_unittest.ArenaMessage)
+  })
+_sym_db.RegisterMessage(ArenaMessage)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_custom_options_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_custom_options_pb2.py
new file mode 100644
index 0000000..0f9d7e6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_custom_options_pb2.py
@@ -0,0 +1,1897 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/unittest_custom_options.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import service as _service
+from google.protobuf import service_reflection
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import descriptor_pb2 as google_dot_protobuf_dot_descriptor__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/unittest_custom_options.proto',
+  package='protobuf_unittest',
+  syntax='proto2',
+  serialized_options=b'\200\001\001\210\001\001\220\001\001\360\350\301\035\352\255\300\345$\372\354\205;p\010d\022\016FileAnnotation\032\026\022\024NestedFileAnnotation\"\036\372\354\205;\031\022\027FileExtensionAnnotation*$\013\020\366\353\256\007\032\033\n\031EmbeddedMessageSetElement\014',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n-google/protobuf/unittest_custom_options.proto\x12\x11protobuf_unittest\x1a google/protobuf/descriptor.proto\"\xbf\x01\n\x1cTestMessageWithCustomOptions\x12\x1e\n\x06\x66ield1\x18\x01 \x01(\tB\x0e\x08\x01\xc1\xe0\xc3\x1d-\xe1u\n\x02\x00\x00\x00\x12\x15\n\x0boneof_field\x18\x02 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+  ,
+  dependencies=[google_dot_protobuf_dot_descriptor__pb2.DESCRIPTOR,])
+
+_METHODOPT1 = _descriptor.EnumDescriptor(
+  name='MethodOpt1',
+  full_name='protobuf_unittest.MethodOpt1',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='METHODOPT1_VAL1', index=0, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='METHODOPT1_VAL2', index=1, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=3006,
+  serialized_end=3060,
+)
+_sym_db.RegisterEnumDescriptor(_METHODOPT1)
+
+MethodOpt1 = enum_type_wrapper.EnumTypeWrapper(_METHODOPT1)
+_AGGREGATEENUM = _descriptor.EnumDescriptor(
+  name='AggregateEnum',
+  full_name='protobuf_unittest.AggregateEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='VALUE', index=0, number=1,
+      serialized_options=b'\312\374\211;\025\022\023EnumValueAnnotation',
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=b'\222\225\210;\020\022\016EnumAnnotation',
+  serialized_start=3062,
+  serialized_end=3139,
+)
+_sym_db.RegisterEnumDescriptor(_AGGREGATEENUM)
+
+AggregateEnum = enum_type_wrapper.EnumTypeWrapper(_AGGREGATEENUM)
+METHODOPT1_VAL1 = 1
+METHODOPT1_VAL2 = 2
+VALUE = 1
+
+FILE_OPT1_FIELD_NUMBER = 7736974
+file_opt1 = _descriptor.FieldDescriptor(
+  name='file_opt1', full_name='protobuf_unittest.file_opt1', index=0,
+  number=7736974, type=4, cpp_type=4, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+MESSAGE_OPT1_FIELD_NUMBER = 7739036
+message_opt1 = _descriptor.FieldDescriptor(
+  name='message_opt1', full_name='protobuf_unittest.message_opt1', index=1,
+  number=7739036, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+FIELD_OPT1_FIELD_NUMBER = 7740936
+field_opt1 = _descriptor.FieldDescriptor(
+  name='field_opt1', full_name='protobuf_unittest.field_opt1', index=2,
+  number=7740936, type=6, cpp_type=4, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+FIELD_OPT2_FIELD_NUMBER = 7753913
+field_opt2 = _descriptor.FieldDescriptor(
+  name='field_opt2', full_name='protobuf_unittest.field_opt2', index=3,
+  number=7753913, type=5, cpp_type=1, label=1,
+  has_default_value=True, default_value=42,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+ONEOF_OPT1_FIELD_NUMBER = 7740111
+oneof_opt1 = _descriptor.FieldDescriptor(
+  name='oneof_opt1', full_name='protobuf_unittest.oneof_opt1', index=4,
+  number=7740111, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+ENUM_OPT1_FIELD_NUMBER = 7753576
+enum_opt1 = _descriptor.FieldDescriptor(
+  name='enum_opt1', full_name='protobuf_unittest.enum_opt1', index=5,
+  number=7753576, type=15, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+ENUM_VALUE_OPT1_FIELD_NUMBER = 1560678
+enum_value_opt1 = _descriptor.FieldDescriptor(
+  name='enum_value_opt1', full_name='protobuf_unittest.enum_value_opt1', index=6,
+  number=1560678, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+SERVICE_OPT1_FIELD_NUMBER = 7887650
+service_opt1 = _descriptor.FieldDescriptor(
+  name='service_opt1', full_name='protobuf_unittest.service_opt1', index=7,
+  number=7887650, type=18, cpp_type=2, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+METHOD_OPT1_FIELD_NUMBER = 7890860
+method_opt1 = _descriptor.FieldDescriptor(
+  name='method_opt1', full_name='protobuf_unittest.method_opt1', index=8,
+  number=7890860, type=14, cpp_type=8, label=1,
+  has_default_value=False, default_value=1,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+BOOL_OPT_FIELD_NUMBER = 7706090
+bool_opt = _descriptor.FieldDescriptor(
+  name='bool_opt', full_name='protobuf_unittest.bool_opt', index=9,
+  number=7706090, type=8, cpp_type=7, label=1,
+  has_default_value=False, default_value=False,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+INT32_OPT_FIELD_NUMBER = 7705709
+int32_opt = _descriptor.FieldDescriptor(
+  name='int32_opt', full_name='protobuf_unittest.int32_opt', index=10,
+  number=7705709, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+INT64_OPT_FIELD_NUMBER = 7705542
+int64_opt = _descriptor.FieldDescriptor(
+  name='int64_opt', full_name='protobuf_unittest.int64_opt', index=11,
+  number=7705542, type=3, cpp_type=2, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UINT32_OPT_FIELD_NUMBER = 7704880
+uint32_opt = _descriptor.FieldDescriptor(
+  name='uint32_opt', full_name='protobuf_unittest.uint32_opt', index=12,
+  number=7704880, type=13, cpp_type=3, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UINT64_OPT_FIELD_NUMBER = 7702367
+uint64_opt = _descriptor.FieldDescriptor(
+  name='uint64_opt', full_name='protobuf_unittest.uint64_opt', index=13,
+  number=7702367, type=4, cpp_type=4, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+SINT32_OPT_FIELD_NUMBER = 7701568
+sint32_opt = _descriptor.FieldDescriptor(
+  name='sint32_opt', full_name='protobuf_unittest.sint32_opt', index=14,
+  number=7701568, type=17, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+SINT64_OPT_FIELD_NUMBER = 7700863
+sint64_opt = _descriptor.FieldDescriptor(
+  name='sint64_opt', full_name='protobuf_unittest.sint64_opt', index=15,
+  number=7700863, type=18, cpp_type=2, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+FIXED32_OPT_FIELD_NUMBER = 7700307
+fixed32_opt = _descriptor.FieldDescriptor(
+  name='fixed32_opt', full_name='protobuf_unittest.fixed32_opt', index=16,
+  number=7700307, type=7, cpp_type=3, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+FIXED64_OPT_FIELD_NUMBER = 7700194
+fixed64_opt = _descriptor.FieldDescriptor(
+  name='fixed64_opt', full_name='protobuf_unittest.fixed64_opt', index=17,
+  number=7700194, type=6, cpp_type=4, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+SFIXED32_OPT_FIELD_NUMBER = 7698645
+sfixed32_opt = _descriptor.FieldDescriptor(
+  name='sfixed32_opt', full_name='protobuf_unittest.sfixed32_opt', index=18,
+  number=7698645, type=15, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+SFIXED64_OPT_FIELD_NUMBER = 7685475
+sfixed64_opt = _descriptor.FieldDescriptor(
+  name='sfixed64_opt', full_name='protobuf_unittest.sfixed64_opt', index=19,
+  number=7685475, type=16, cpp_type=2, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+FLOAT_OPT_FIELD_NUMBER = 7675390
+float_opt = _descriptor.FieldDescriptor(
+  name='float_opt', full_name='protobuf_unittest.float_opt', index=20,
+  number=7675390, type=2, cpp_type=6, label=1,
+  has_default_value=False, default_value=float(0),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DOUBLE_OPT_FIELD_NUMBER = 7673293
+double_opt = _descriptor.FieldDescriptor(
+  name='double_opt', full_name='protobuf_unittest.double_opt', index=21,
+  number=7673293, type=1, cpp_type=5, label=1,
+  has_default_value=False, default_value=float(0),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+STRING_OPT_FIELD_NUMBER = 7673285
+string_opt = _descriptor.FieldDescriptor(
+  name='string_opt', full_name='protobuf_unittest.string_opt', index=22,
+  number=7673285, type=9, cpp_type=9, label=1,
+  has_default_value=False, default_value=b"".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+BYTES_OPT_FIELD_NUMBER = 7673238
+bytes_opt = _descriptor.FieldDescriptor(
+  name='bytes_opt', full_name='protobuf_unittest.bytes_opt', index=23,
+  number=7673238, type=12, cpp_type=9, label=1,
+  has_default_value=False, default_value=b"",
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+ENUM_OPT_FIELD_NUMBER = 7673233
+enum_opt = _descriptor.FieldDescriptor(
+  name='enum_opt', full_name='protobuf_unittest.enum_opt', index=24,
+  number=7673233, type=14, cpp_type=8, label=1,
+  has_default_value=False, default_value=22,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+MESSAGE_TYPE_OPT_FIELD_NUMBER = 7665967
+message_type_opt = _descriptor.FieldDescriptor(
+  name='message_type_opt', full_name='protobuf_unittest.message_type_opt', index=25,
+  number=7665967, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+QUUX_FIELD_NUMBER = 7663707
+quux = _descriptor.FieldDescriptor(
+  name='quux', full_name='protobuf_unittest.quux', index=26,
+  number=7663707, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+CORGE_FIELD_NUMBER = 7663442
+corge = _descriptor.FieldDescriptor(
+  name='corge', full_name='protobuf_unittest.corge', index=27,
+  number=7663442, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+GRAULT_FIELD_NUMBER = 7650927
+grault = _descriptor.FieldDescriptor(
+  name='grault', full_name='protobuf_unittest.grault', index=28,
+  number=7650927, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+GARPLY_FIELD_NUMBER = 7649992
+garply = _descriptor.FieldDescriptor(
+  name='garply', full_name='protobuf_unittest.garply', index=29,
+  number=7649992, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+COMPLEX_OPT1_FIELD_NUMBER = 7646756
+complex_opt1 = _descriptor.FieldDescriptor(
+  name='complex_opt1', full_name='protobuf_unittest.complex_opt1', index=30,
+  number=7646756, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+COMPLEX_OPT2_FIELD_NUMBER = 7636949
+complex_opt2 = _descriptor.FieldDescriptor(
+  name='complex_opt2', full_name='protobuf_unittest.complex_opt2', index=31,
+  number=7636949, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+COMPLEX_OPT3_FIELD_NUMBER = 7636463
+complex_opt3 = _descriptor.FieldDescriptor(
+  name='complex_opt3', full_name='protobuf_unittest.complex_opt3', index=32,
+  number=7636463, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+COMPLEXOPT6_FIELD_NUMBER = 7595468
+complexopt6 = _descriptor.FieldDescriptor(
+  name='complexopt6', full_name='protobuf_unittest.complexopt6', index=33,
+  number=7595468, type=10, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+FILEOPT_FIELD_NUMBER = 15478479
+fileopt = _descriptor.FieldDescriptor(
+  name='fileopt', full_name='protobuf_unittest.fileopt', index=34,
+  number=15478479, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+MSGOPT_FIELD_NUMBER = 15480088
+msgopt = _descriptor.FieldDescriptor(
+  name='msgopt', full_name='protobuf_unittest.msgopt', index=35,
+  number=15480088, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+FIELDOPT_FIELD_NUMBER = 15481374
+fieldopt = _descriptor.FieldDescriptor(
+  name='fieldopt', full_name='protobuf_unittest.fieldopt', index=36,
+  number=15481374, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+ENUMOPT_FIELD_NUMBER = 15483218
+enumopt = _descriptor.FieldDescriptor(
+  name='enumopt', full_name='protobuf_unittest.enumopt', index=37,
+  number=15483218, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+ENUMVALOPT_FIELD_NUMBER = 15486921
+enumvalopt = _descriptor.FieldDescriptor(
+  name='enumvalopt', full_name='protobuf_unittest.enumvalopt', index=38,
+  number=15486921, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+SERVICEOPT_FIELD_NUMBER = 15497145
+serviceopt = _descriptor.FieldDescriptor(
+  name='serviceopt', full_name='protobuf_unittest.serviceopt', index=39,
+  number=15497145, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+METHODOPT_FIELD_NUMBER = 15512713
+methodopt = _descriptor.FieldDescriptor(
+  name='methodopt', full_name='protobuf_unittest.methodopt', index=40,
+  number=15512713, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REQUIRED_ENUM_OPT_FIELD_NUMBER = 106161807
+required_enum_opt = _descriptor.FieldDescriptor(
+  name='required_enum_opt', full_name='protobuf_unittest.required_enum_opt', index=41,
+  number=106161807, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+_TESTMESSAGEWITHCUSTOMOPTIONS_ANENUM = _descriptor.EnumDescriptor(
+  name='AnEnum',
+  full_name='protobuf_unittest.TestMessageWithCustomOptions.AnEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='ANENUM_VAL1', index=0, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ANENUM_VAL2', index=1, number=2,
+      serialized_options=b'\260\206\372\005{',
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=b'\305\366\311\035\353\374\377\377',
+  serialized_start=190,
+  serialized_end=249,
+)
+_sym_db.RegisterEnumDescriptor(_TESTMESSAGEWITHCUSTOMOPTIONS_ANENUM)
+
+_DUMMYMESSAGECONTAININGENUM_TESTENUMTYPE = _descriptor.EnumDescriptor(
+  name='TestEnumType',
+  full_name='protobuf_unittest.DummyMessageContainingEnum.TestEnumType',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='TEST_OPTION_ENUM_TYPE1', index=0, number=22,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='TEST_OPTION_ENUM_TYPE2', index=1, number=-23,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=443,
+  serialized_end=522,
+)
+_sym_db.RegisterEnumDescriptor(_DUMMYMESSAGECONTAININGENUM_TESTENUMTYPE)
+
+_NESTEDOPTIONTYPE_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='protobuf_unittest.NestedOptionType.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='NESTED_ENUM_VALUE', index=0, number=1,
+      serialized_options=b'\260\206\372\005\354\007',
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=b'\305\366\311\035\353\003\000\000',
+  serialized_start=2618,
+  serialized_end=2671,
+)
+_sym_db.RegisterEnumDescriptor(_NESTEDOPTIONTYPE_NESTEDENUM)
+
+_OLDOPTIONTYPE_TESTENUM = _descriptor.EnumDescriptor(
+  name='TestEnum',
+  full_name='protobuf_unittest.OldOptionType.TestEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='OLD_VALUE', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=2815,
+  serialized_end=2840,
+)
+_sym_db.RegisterEnumDescriptor(_OLDOPTIONTYPE_TESTENUM)
+
+_NEWOPTIONTYPE_TESTENUM = _descriptor.EnumDescriptor(
+  name='TestEnum',
+  full_name='protobuf_unittest.NewOptionType.TestEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='OLD_VALUE', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='NEW_VALUE', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=2917,
+  serialized_end=2957,
+)
+_sym_db.RegisterEnumDescriptor(_NEWOPTIONTYPE_TESTENUM)
+
+
+_TESTMESSAGEWITHCUSTOMOPTIONS = _descriptor.Descriptor(
+  name='TestMessageWithCustomOptions',
+  full_name='protobuf_unittest.TestMessageWithCustomOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field1', full_name='protobuf_unittest.TestMessageWithCustomOptions.field1', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001\301\340\303\035-\341u\n\002\000\000\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_field', full_name='protobuf_unittest.TestMessageWithCustomOptions.oneof_field', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _TESTMESSAGEWITHCUSTOMOPTIONS_ANENUM,
+  ],
+  serialized_options=b'\010\000\340\351\302\035\310\377\377\377\377\377\377\377\377\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='AnOneof', full_name='protobuf_unittest.TestMessageWithCustomOptions.AnOneof',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[], serialized_options=b'\370\254\303\035\235\377\377\377\377\377\377\377\377\001'),
+  ],
+  serialized_start=103,
+  serialized_end=294,
+)
+
+
+_CUSTOMOPTIONFOOREQUEST = _descriptor.Descriptor(
+  name='CustomOptionFooRequest',
+  full_name='protobuf_unittest.CustomOptionFooRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=296,
+  serialized_end=320,
+)
+
+
+_CUSTOMOPTIONFOORESPONSE = _descriptor.Descriptor(
+  name='CustomOptionFooResponse',
+  full_name='protobuf_unittest.CustomOptionFooResponse',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=322,
+  serialized_end=347,
+)
+
+
+_CUSTOMOPTIONFOOCLIENTMESSAGE = _descriptor.Descriptor(
+  name='CustomOptionFooClientMessage',
+  full_name='protobuf_unittest.CustomOptionFooClientMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=349,
+  serialized_end=379,
+)
+
+
+_CUSTOMOPTIONFOOSERVERMESSAGE = _descriptor.Descriptor(
+  name='CustomOptionFooServerMessage',
+  full_name='protobuf_unittest.CustomOptionFooServerMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=381,
+  serialized_end=411,
+)
+
+
+_DUMMYMESSAGECONTAININGENUM = _descriptor.Descriptor(
+  name='DummyMessageContainingEnum',
+  full_name='protobuf_unittest.DummyMessageContainingEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _DUMMYMESSAGECONTAININGENUM_TESTENUMTYPE,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=413,
+  serialized_end=522,
+)
+
+
+_DUMMYMESSAGEINVALIDASOPTIONTYPE = _descriptor.Descriptor(
+  name='DummyMessageInvalidAsOptionType',
+  full_name='protobuf_unittest.DummyMessageInvalidAsOptionType',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=524,
+  serialized_end=557,
+)
+
+
+_CUSTOMOPTIONMININTEGERVALUES = _descriptor.Descriptor(
+  name='CustomOptionMinIntegerValues',
+  full_name='protobuf_unittest.CustomOptionMinIntegerValues',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\320\336\262\035\000\350\306\262\035\200\200\200\200\370\377\377\377\377\001\260\274\262\035\200\200\200\200\200\200\200\200\200\001\200\223\262\035\000\370\365\260\035\000\200\304\260\035\377\377\377\377\017\370\227\260\035\377\377\377\377\377\377\377\377\377\001\235\365\257\035\000\000\000\000\221\356\257\035\000\000\000\000\000\000\000\000\255\215\257\035\000\000\000\200\231\326\250\035\000\000\000\000\000\000\000\200',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=560,
+  serialized_end=698,
+)
+
+
+_CUSTOMOPTIONMAXINTEGERVALUES = _descriptor.Descriptor(
+  name='CustomOptionMaxIntegerValues',
+  full_name='protobuf_unittest.CustomOptionMaxIntegerValues',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\320\336\262\035\001\350\306\262\035\377\377\377\377\007\260\274\262\035\377\377\377\377\377\377\377\377\177\200\223\262\035\377\377\377\377\017\370\365\260\035\377\377\377\377\377\377\377\377\377\001\200\304\260\035\376\377\377\377\017\370\227\260\035\376\377\377\377\377\377\377\377\377\001\235\365\257\035\377\377\377\377\221\356\257\035\377\377\377\377\377\377\377\377\255\215\257\035\377\377\377\177\231\326\250\035\377\377\377\377\377\377\377\177',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=701,
+  serialized_end=846,
+)
+
+
+_CUSTOMOPTIONOTHERVALUES = _descriptor.Descriptor(
+  name='CustomOptionOtherValues',
+  full_name='protobuf_unittest.CustomOptionOtherValues',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\350\306\262\035\234\377\377\377\377\377\377\377\377\001\365\337\243\035\347\207EA\351\334\242\035\373Y\214B\312\300\363?\252\334\242\035\016Hello, \"World\"\262\331\242\035\013Hello\000World\210\331\242\035\351\377\377\377\377\377\377\377\377\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=848,
+  serialized_end=958,
+)
+
+
+_SETTINGREALSFROMPOSITIVEINTS = _descriptor.Descriptor(
+  name='SettingRealsFromPositiveInts',
+  full_name='protobuf_unittest.SettingRealsFromPositiveInts',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\365\337\243\035\000\000@A\351\334\242\035\000\000\000\000\000@c@',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=960,
+  serialized_end=1012,
+)
+
+
+_SETTINGREALSFROMNEGATIVEINTS = _descriptor.Descriptor(
+  name='SettingRealsFromNegativeInts',
+  full_name='protobuf_unittest.SettingRealsFromNegativeInts',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\365\337\243\035\000\000@\301\351\334\242\035\000\000\000\000\000@c\300',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1014,
+  serialized_end=1066,
+)
+
+
+_COMPLEXOPTIONTYPE1 = _descriptor.Descriptor(
+  name='ComplexOptionType1',
+  full_name='protobuf_unittest.ComplexOptionType1',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='foo', full_name='protobuf_unittest.ComplexOptionType1.foo', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo2', full_name='protobuf_unittest.ComplexOptionType1.foo2', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo3', full_name='protobuf_unittest.ComplexOptionType1.foo3', index=2,
+      number=3, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo4', full_name='protobuf_unittest.ComplexOptionType1.foo4', index=3,
+      number=4, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(100, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=1068,
+  serialized_end=1153,
+)
+
+
+_COMPLEXOPTIONTYPE2_COMPLEXOPTIONTYPE4 = _descriptor.Descriptor(
+  name='ComplexOptionType4',
+  full_name='protobuf_unittest.ComplexOptionType2.ComplexOptionType4',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='waldo', full_name='protobuf_unittest.ComplexOptionType2.ComplexOptionType4.waldo', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='complex_opt4', full_name='protobuf_unittest.ComplexOptionType2.ComplexOptionType4.complex_opt4', index=0,
+      number=7633546, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1390,
+  serialized_end=1541,
+)
+
+_COMPLEXOPTIONTYPE2 = _descriptor.Descriptor(
+  name='ComplexOptionType2',
+  full_name='protobuf_unittest.ComplexOptionType2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bar', full_name='protobuf_unittest.ComplexOptionType2.bar', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='baz', full_name='protobuf_unittest.ComplexOptionType2.baz', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='fred', full_name='protobuf_unittest.ComplexOptionType2.fred', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='barney', full_name='protobuf_unittest.ComplexOptionType2.barney', index=3,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_COMPLEXOPTIONTYPE2_COMPLEXOPTIONTYPE4, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(100, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=1156,
+  serialized_end=1551,
+)
+
+
+_COMPLEXOPTIONTYPE3_COMPLEXOPTIONTYPE5 = _descriptor.Descriptor(
+  name='ComplexOptionType5',
+  full_name='protobuf_unittest.ComplexOptionType3.ComplexOptionType5',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='plugh', full_name='protobuf_unittest.ComplexOptionType3.ComplexOptionType5.plugh', index=0,
+      number=3, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1675,
+  serialized_end=1710,
+)
+
+_COMPLEXOPTIONTYPE3 = _descriptor.Descriptor(
+  name='ComplexOptionType3',
+  full_name='protobuf_unittest.ComplexOptionType3',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='qux', full_name='protobuf_unittest.ComplexOptionType3.qux', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='complexoptiontype5', full_name='protobuf_unittest.ComplexOptionType3.complexoptiontype5', index=1,
+      number=2, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_COMPLEXOPTIONTYPE3_COMPLEXOPTIONTYPE5, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1554,
+  serialized_end=1710,
+)
+
+
+_COMPLEXOPT6 = _descriptor.Descriptor(
+  name='ComplexOpt6',
+  full_name='protobuf_unittest.ComplexOpt6',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='xyzzy', full_name='protobuf_unittest.ComplexOpt6.xyzzy', index=0,
+      number=7593951, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1712,
+  serialized_end=1743,
+)
+
+
+_VARIOUSCOMPLEXOPTIONS = _descriptor.Descriptor(
+  name='VariousComplexOptions',
+  full_name='protobuf_unittest.VariousComplexOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\242\342\225\035\002\010*\242\342\225\035\006\330\205\236\035\304\002\242\342\225\035\010\222\365\235\035\003\010\354\006\242\342\225\035\002 c\242\342\225\035\002 X\252\375\220\035\003\020\333\007\252\375\220\035\006\370\346\227\035\216\005\252\375\220\035\005\n\003\010\347\005\252\375\220\035\010\n\006\330\205\236\035\317\017\252\375\220\035\n\n\010\222\365\235\035\003\010\330\017\252\375\220\035\010\302\254\227\035\003\010\345\005\252\375\220\035\013\302\254\227\035\006\330\205\236\035\316\017\252\375\220\035\r\302\254\227\035\010\222\365\235\035\003\010\311\020\322\250\217\035\003\010\263\017\252\375\220\035\005\032\003\010\301\002\252\375\220\035\004\"\002\010e\252\375\220\035\005\"\003\010\324\001\372\336\220\035\002\010\t\372\336\220\035\004\023\030\026\024\343\334\374\034\370\375\373\034\030\344\334\374\034',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1746,
+  serialized_end=1987,
+)
+
+
+_AGGREGATEMESSAGESET = _descriptor.Descriptor(
+  name='AggregateMessageSet',
+  full_name='protobuf_unittest.AggregateMessageSet',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\010\001',
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(4, 2147483647), ],
+  oneofs=[
+  ],
+  serialized_start=1989,
+  serialized_end=2024,
+)
+
+
+_AGGREGATEMESSAGESETELEMENT = _descriptor.Descriptor(
+  name='AggregateMessageSetElement',
+  full_name='protobuf_unittest.AggregateMessageSetElement',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='s', full_name='protobuf_unittest.AggregateMessageSetElement.s', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='message_set_extension', full_name='protobuf_unittest.AggregateMessageSetElement.message_set_extension', index=0,
+      number=15447542, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2027,
+  serialized_end=2187,
+)
+
+
+_AGGREGATE = _descriptor.Descriptor(
+  name='Aggregate',
+  full_name='protobuf_unittest.Aggregate',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='i', full_name='protobuf_unittest.Aggregate.i', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='s', full_name='protobuf_unittest.Aggregate.s', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='sub', full_name='protobuf_unittest.Aggregate.sub', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='file', full_name='protobuf_unittest.Aggregate.file', index=3,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='mset', full_name='protobuf_unittest.Aggregate.mset', index=4,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='nested', full_name='protobuf_unittest.Aggregate.nested', index=0,
+      number=15476903, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2190,
+  serialized_end=2443,
+)
+
+
+_AGGREGATEMESSAGE = _descriptor.Descriptor(
+  name='AggregateMessage',
+  full_name='protobuf_unittest.AggregateMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='fieldname', full_name='protobuf_unittest.AggregateMessage.fieldname', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\362\241\207;\021\022\017FieldAnnotation', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\302\321\206;\025\010e\022\021MessageAnnotation',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2445,
+  serialized_end=2534,
+)
+
+
+_NESTEDOPTIONTYPE_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='protobuf_unittest.NestedOptionType.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nested_field', full_name='protobuf_unittest.NestedOptionType.NestedMessage.nested_field', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\301\340\303\035\352\003\000\000\000\000\000\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\340\351\302\035\351\007',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2557,
+  serialized_end=2616,
+)
+
+_NESTEDOPTIONTYPE = _descriptor.Descriptor(
+  name='NestedOptionType',
+  full_name='protobuf_unittest.NestedOptionType',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='nested_extension', full_name='protobuf_unittest.NestedOptionType.nested_extension', index=0,
+      number=7912573, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=b'\310\213\312\035\355\007', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[_NESTEDOPTIONTYPE_NESTEDMESSAGE, ],
+  enum_types=[
+    _NESTEDOPTIONTYPE_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2537,
+  serialized_end=2738,
+)
+
+
+_OLDOPTIONTYPE = _descriptor.Descriptor(
+  name='OldOptionType',
+  full_name='protobuf_unittest.OldOptionType',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.OldOptionType.value', index=0,
+      number=1, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _OLDOPTIONTYPE_TESTENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2740,
+  serialized_end=2840,
+)
+
+
+_NEWOPTIONTYPE = _descriptor.Descriptor(
+  name='NewOptionType',
+  full_name='protobuf_unittest.NewOptionType',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.NewOptionType.value', index=0,
+      number=1, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _NEWOPTIONTYPE_TESTENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2842,
+  serialized_end=2957,
+)
+
+
+_TESTMESSAGEWITHREQUIREDENUMOPTION = _descriptor.Descriptor(
+  name='TestMessageWithRequiredEnumOption',
+  full_name='protobuf_unittest.TestMessageWithRequiredEnumOption',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\372\350\374\224\003\002\010\000',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2959,
+  serialized_end=3004,
+)
+
+_TESTMESSAGEWITHCUSTOMOPTIONS_ANENUM.containing_type = _TESTMESSAGEWITHCUSTOMOPTIONS
+_TESTMESSAGEWITHCUSTOMOPTIONS.oneofs_by_name['AnOneof'].fields.append(
+  _TESTMESSAGEWITHCUSTOMOPTIONS.fields_by_name['oneof_field'])
+_TESTMESSAGEWITHCUSTOMOPTIONS.fields_by_name['oneof_field'].containing_oneof = _TESTMESSAGEWITHCUSTOMOPTIONS.oneofs_by_name['AnOneof']
+_DUMMYMESSAGECONTAININGENUM_TESTENUMTYPE.containing_type = _DUMMYMESSAGECONTAININGENUM
+_COMPLEXOPTIONTYPE2_COMPLEXOPTIONTYPE4.containing_type = _COMPLEXOPTIONTYPE2
+_COMPLEXOPTIONTYPE2.fields_by_name['bar'].message_type = _COMPLEXOPTIONTYPE1
+_COMPLEXOPTIONTYPE2.fields_by_name['fred'].message_type = _COMPLEXOPTIONTYPE2_COMPLEXOPTIONTYPE4
+_COMPLEXOPTIONTYPE2.fields_by_name['barney'].message_type = _COMPLEXOPTIONTYPE2_COMPLEXOPTIONTYPE4
+_COMPLEXOPTIONTYPE3_COMPLEXOPTIONTYPE5.containing_type = _COMPLEXOPTIONTYPE3
+_COMPLEXOPTIONTYPE3.fields_by_name['complexoptiontype5'].message_type = _COMPLEXOPTIONTYPE3_COMPLEXOPTIONTYPE5
+_AGGREGATE.fields_by_name['sub'].message_type = _AGGREGATE
+_AGGREGATE.fields_by_name['file'].message_type = google_dot_protobuf_dot_descriptor__pb2._FILEOPTIONS
+_AGGREGATE.fields_by_name['mset'].message_type = _AGGREGATEMESSAGESET
+_NESTEDOPTIONTYPE_NESTEDMESSAGE.containing_type = _NESTEDOPTIONTYPE
+_NESTEDOPTIONTYPE_NESTEDENUM.containing_type = _NESTEDOPTIONTYPE
+_OLDOPTIONTYPE.fields_by_name['value'].enum_type = _OLDOPTIONTYPE_TESTENUM
+_OLDOPTIONTYPE_TESTENUM.containing_type = _OLDOPTIONTYPE
+_NEWOPTIONTYPE.fields_by_name['value'].enum_type = _NEWOPTIONTYPE_TESTENUM
+_NEWOPTIONTYPE_TESTENUM.containing_type = _NEWOPTIONTYPE
+DESCRIPTOR.message_types_by_name['TestMessageWithCustomOptions'] = _TESTMESSAGEWITHCUSTOMOPTIONS
+DESCRIPTOR.message_types_by_name['CustomOptionFooRequest'] = _CUSTOMOPTIONFOOREQUEST
+DESCRIPTOR.message_types_by_name['CustomOptionFooResponse'] = _CUSTOMOPTIONFOORESPONSE
+DESCRIPTOR.message_types_by_name['CustomOptionFooClientMessage'] = _CUSTOMOPTIONFOOCLIENTMESSAGE
+DESCRIPTOR.message_types_by_name['CustomOptionFooServerMessage'] = _CUSTOMOPTIONFOOSERVERMESSAGE
+DESCRIPTOR.message_types_by_name['DummyMessageContainingEnum'] = _DUMMYMESSAGECONTAININGENUM
+DESCRIPTOR.message_types_by_name['DummyMessageInvalidAsOptionType'] = _DUMMYMESSAGEINVALIDASOPTIONTYPE
+DESCRIPTOR.message_types_by_name['CustomOptionMinIntegerValues'] = _CUSTOMOPTIONMININTEGERVALUES
+DESCRIPTOR.message_types_by_name['CustomOptionMaxIntegerValues'] = _CUSTOMOPTIONMAXINTEGERVALUES
+DESCRIPTOR.message_types_by_name['CustomOptionOtherValues'] = _CUSTOMOPTIONOTHERVALUES
+DESCRIPTOR.message_types_by_name['SettingRealsFromPositiveInts'] = _SETTINGREALSFROMPOSITIVEINTS
+DESCRIPTOR.message_types_by_name['SettingRealsFromNegativeInts'] = _SETTINGREALSFROMNEGATIVEINTS
+DESCRIPTOR.message_types_by_name['ComplexOptionType1'] = _COMPLEXOPTIONTYPE1
+DESCRIPTOR.message_types_by_name['ComplexOptionType2'] = _COMPLEXOPTIONTYPE2
+DESCRIPTOR.message_types_by_name['ComplexOptionType3'] = _COMPLEXOPTIONTYPE3
+DESCRIPTOR.message_types_by_name['ComplexOpt6'] = _COMPLEXOPT6
+DESCRIPTOR.message_types_by_name['VariousComplexOptions'] = _VARIOUSCOMPLEXOPTIONS
+DESCRIPTOR.message_types_by_name['AggregateMessageSet'] = _AGGREGATEMESSAGESET
+DESCRIPTOR.message_types_by_name['AggregateMessageSetElement'] = _AGGREGATEMESSAGESETELEMENT
+DESCRIPTOR.message_types_by_name['Aggregate'] = _AGGREGATE
+DESCRIPTOR.message_types_by_name['AggregateMessage'] = _AGGREGATEMESSAGE
+DESCRIPTOR.message_types_by_name['NestedOptionType'] = _NESTEDOPTIONTYPE
+DESCRIPTOR.message_types_by_name['OldOptionType'] = _OLDOPTIONTYPE
+DESCRIPTOR.message_types_by_name['NewOptionType'] = _NEWOPTIONTYPE
+DESCRIPTOR.message_types_by_name['TestMessageWithRequiredEnumOption'] = _TESTMESSAGEWITHREQUIREDENUMOPTION
+DESCRIPTOR.enum_types_by_name['MethodOpt1'] = _METHODOPT1
+DESCRIPTOR.enum_types_by_name['AggregateEnum'] = _AGGREGATEENUM
+DESCRIPTOR.extensions_by_name['file_opt1'] = file_opt1
+DESCRIPTOR.extensions_by_name['message_opt1'] = message_opt1
+DESCRIPTOR.extensions_by_name['field_opt1'] = field_opt1
+DESCRIPTOR.extensions_by_name['field_opt2'] = field_opt2
+DESCRIPTOR.extensions_by_name['oneof_opt1'] = oneof_opt1
+DESCRIPTOR.extensions_by_name['enum_opt1'] = enum_opt1
+DESCRIPTOR.extensions_by_name['enum_value_opt1'] = enum_value_opt1
+DESCRIPTOR.extensions_by_name['service_opt1'] = service_opt1
+DESCRIPTOR.extensions_by_name['method_opt1'] = method_opt1
+DESCRIPTOR.extensions_by_name['bool_opt'] = bool_opt
+DESCRIPTOR.extensions_by_name['int32_opt'] = int32_opt
+DESCRIPTOR.extensions_by_name['int64_opt'] = int64_opt
+DESCRIPTOR.extensions_by_name['uint32_opt'] = uint32_opt
+DESCRIPTOR.extensions_by_name['uint64_opt'] = uint64_opt
+DESCRIPTOR.extensions_by_name['sint32_opt'] = sint32_opt
+DESCRIPTOR.extensions_by_name['sint64_opt'] = sint64_opt
+DESCRIPTOR.extensions_by_name['fixed32_opt'] = fixed32_opt
+DESCRIPTOR.extensions_by_name['fixed64_opt'] = fixed64_opt
+DESCRIPTOR.extensions_by_name['sfixed32_opt'] = sfixed32_opt
+DESCRIPTOR.extensions_by_name['sfixed64_opt'] = sfixed64_opt
+DESCRIPTOR.extensions_by_name['float_opt'] = float_opt
+DESCRIPTOR.extensions_by_name['double_opt'] = double_opt
+DESCRIPTOR.extensions_by_name['string_opt'] = string_opt
+DESCRIPTOR.extensions_by_name['bytes_opt'] = bytes_opt
+DESCRIPTOR.extensions_by_name['enum_opt'] = enum_opt
+DESCRIPTOR.extensions_by_name['message_type_opt'] = message_type_opt
+DESCRIPTOR.extensions_by_name['quux'] = quux
+DESCRIPTOR.extensions_by_name['corge'] = corge
+DESCRIPTOR.extensions_by_name['grault'] = grault
+DESCRIPTOR.extensions_by_name['garply'] = garply
+DESCRIPTOR.extensions_by_name['complex_opt1'] = complex_opt1
+DESCRIPTOR.extensions_by_name['complex_opt2'] = complex_opt2
+DESCRIPTOR.extensions_by_name['complex_opt3'] = complex_opt3
+DESCRIPTOR.extensions_by_name['complexopt6'] = complexopt6
+DESCRIPTOR.extensions_by_name['fileopt'] = fileopt
+DESCRIPTOR.extensions_by_name['msgopt'] = msgopt
+DESCRIPTOR.extensions_by_name['fieldopt'] = fieldopt
+DESCRIPTOR.extensions_by_name['enumopt'] = enumopt
+DESCRIPTOR.extensions_by_name['enumvalopt'] = enumvalopt
+DESCRIPTOR.extensions_by_name['serviceopt'] = serviceopt
+DESCRIPTOR.extensions_by_name['methodopt'] = methodopt
+DESCRIPTOR.extensions_by_name['required_enum_opt'] = required_enum_opt
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestMessageWithCustomOptions = _reflection.GeneratedProtocolMessageType('TestMessageWithCustomOptions', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGEWITHCUSTOMOPTIONS,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMessageWithCustomOptions)
+  })
+_sym_db.RegisterMessage(TestMessageWithCustomOptions)
+
+CustomOptionFooRequest = _reflection.GeneratedProtocolMessageType('CustomOptionFooRequest', (_message.Message,), {
+  'DESCRIPTOR' : _CUSTOMOPTIONFOOREQUEST,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.CustomOptionFooRequest)
+  })
+_sym_db.RegisterMessage(CustomOptionFooRequest)
+
+CustomOptionFooResponse = _reflection.GeneratedProtocolMessageType('CustomOptionFooResponse', (_message.Message,), {
+  'DESCRIPTOR' : _CUSTOMOPTIONFOORESPONSE,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.CustomOptionFooResponse)
+  })
+_sym_db.RegisterMessage(CustomOptionFooResponse)
+
+CustomOptionFooClientMessage = _reflection.GeneratedProtocolMessageType('CustomOptionFooClientMessage', (_message.Message,), {
+  'DESCRIPTOR' : _CUSTOMOPTIONFOOCLIENTMESSAGE,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.CustomOptionFooClientMessage)
+  })
+_sym_db.RegisterMessage(CustomOptionFooClientMessage)
+
+CustomOptionFooServerMessage = _reflection.GeneratedProtocolMessageType('CustomOptionFooServerMessage', (_message.Message,), {
+  'DESCRIPTOR' : _CUSTOMOPTIONFOOSERVERMESSAGE,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.CustomOptionFooServerMessage)
+  })
+_sym_db.RegisterMessage(CustomOptionFooServerMessage)
+
+DummyMessageContainingEnum = _reflection.GeneratedProtocolMessageType('DummyMessageContainingEnum', (_message.Message,), {
+  'DESCRIPTOR' : _DUMMYMESSAGECONTAININGENUM,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.DummyMessageContainingEnum)
+  })
+_sym_db.RegisterMessage(DummyMessageContainingEnum)
+
+DummyMessageInvalidAsOptionType = _reflection.GeneratedProtocolMessageType('DummyMessageInvalidAsOptionType', (_message.Message,), {
+  'DESCRIPTOR' : _DUMMYMESSAGEINVALIDASOPTIONTYPE,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.DummyMessageInvalidAsOptionType)
+  })
+_sym_db.RegisterMessage(DummyMessageInvalidAsOptionType)
+
+CustomOptionMinIntegerValues = _reflection.GeneratedProtocolMessageType('CustomOptionMinIntegerValues', (_message.Message,), {
+  'DESCRIPTOR' : _CUSTOMOPTIONMININTEGERVALUES,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.CustomOptionMinIntegerValues)
+  })
+_sym_db.RegisterMessage(CustomOptionMinIntegerValues)
+
+CustomOptionMaxIntegerValues = _reflection.GeneratedProtocolMessageType('CustomOptionMaxIntegerValues', (_message.Message,), {
+  'DESCRIPTOR' : _CUSTOMOPTIONMAXINTEGERVALUES,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.CustomOptionMaxIntegerValues)
+  })
+_sym_db.RegisterMessage(CustomOptionMaxIntegerValues)
+
+CustomOptionOtherValues = _reflection.GeneratedProtocolMessageType('CustomOptionOtherValues', (_message.Message,), {
+  'DESCRIPTOR' : _CUSTOMOPTIONOTHERVALUES,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.CustomOptionOtherValues)
+  })
+_sym_db.RegisterMessage(CustomOptionOtherValues)
+
+SettingRealsFromPositiveInts = _reflection.GeneratedProtocolMessageType('SettingRealsFromPositiveInts', (_message.Message,), {
+  'DESCRIPTOR' : _SETTINGREALSFROMPOSITIVEINTS,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.SettingRealsFromPositiveInts)
+  })
+_sym_db.RegisterMessage(SettingRealsFromPositiveInts)
+
+SettingRealsFromNegativeInts = _reflection.GeneratedProtocolMessageType('SettingRealsFromNegativeInts', (_message.Message,), {
+  'DESCRIPTOR' : _SETTINGREALSFROMNEGATIVEINTS,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.SettingRealsFromNegativeInts)
+  })
+_sym_db.RegisterMessage(SettingRealsFromNegativeInts)
+
+ComplexOptionType1 = _reflection.GeneratedProtocolMessageType('ComplexOptionType1', (_message.Message,), {
+  'DESCRIPTOR' : _COMPLEXOPTIONTYPE1,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.ComplexOptionType1)
+  })
+_sym_db.RegisterMessage(ComplexOptionType1)
+
+ComplexOptionType2 = _reflection.GeneratedProtocolMessageType('ComplexOptionType2', (_message.Message,), {
+
+  'ComplexOptionType4' : _reflection.GeneratedProtocolMessageType('ComplexOptionType4', (_message.Message,), {
+    'DESCRIPTOR' : _COMPLEXOPTIONTYPE2_COMPLEXOPTIONTYPE4,
+    '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.ComplexOptionType2.ComplexOptionType4)
+    })
+  ,
+  'DESCRIPTOR' : _COMPLEXOPTIONTYPE2,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.ComplexOptionType2)
+  })
+_sym_db.RegisterMessage(ComplexOptionType2)
+_sym_db.RegisterMessage(ComplexOptionType2.ComplexOptionType4)
+
+ComplexOptionType3 = _reflection.GeneratedProtocolMessageType('ComplexOptionType3', (_message.Message,), {
+
+  'ComplexOptionType5' : _reflection.GeneratedProtocolMessageType('ComplexOptionType5', (_message.Message,), {
+    'DESCRIPTOR' : _COMPLEXOPTIONTYPE3_COMPLEXOPTIONTYPE5,
+    '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.ComplexOptionType3.ComplexOptionType5)
+    })
+  ,
+  'DESCRIPTOR' : _COMPLEXOPTIONTYPE3,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.ComplexOptionType3)
+  })
+_sym_db.RegisterMessage(ComplexOptionType3)
+_sym_db.RegisterMessage(ComplexOptionType3.ComplexOptionType5)
+
+ComplexOpt6 = _reflection.GeneratedProtocolMessageType('ComplexOpt6', (_message.Message,), {
+  'DESCRIPTOR' : _COMPLEXOPT6,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.ComplexOpt6)
+  })
+_sym_db.RegisterMessage(ComplexOpt6)
+
+VariousComplexOptions = _reflection.GeneratedProtocolMessageType('VariousComplexOptions', (_message.Message,), {
+  'DESCRIPTOR' : _VARIOUSCOMPLEXOPTIONS,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.VariousComplexOptions)
+  })
+_sym_db.RegisterMessage(VariousComplexOptions)
+
+AggregateMessageSet = _reflection.GeneratedProtocolMessageType('AggregateMessageSet', (_message.Message,), {
+  'DESCRIPTOR' : _AGGREGATEMESSAGESET,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.AggregateMessageSet)
+  })
+_sym_db.RegisterMessage(AggregateMessageSet)
+
+AggregateMessageSetElement = _reflection.GeneratedProtocolMessageType('AggregateMessageSetElement', (_message.Message,), {
+  'DESCRIPTOR' : _AGGREGATEMESSAGESETELEMENT,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.AggregateMessageSetElement)
+  })
+_sym_db.RegisterMessage(AggregateMessageSetElement)
+
+Aggregate = _reflection.GeneratedProtocolMessageType('Aggregate', (_message.Message,), {
+  'DESCRIPTOR' : _AGGREGATE,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.Aggregate)
+  })
+_sym_db.RegisterMessage(Aggregate)
+
+AggregateMessage = _reflection.GeneratedProtocolMessageType('AggregateMessage', (_message.Message,), {
+  'DESCRIPTOR' : _AGGREGATEMESSAGE,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.AggregateMessage)
+  })
+_sym_db.RegisterMessage(AggregateMessage)
+
+NestedOptionType = _reflection.GeneratedProtocolMessageType('NestedOptionType', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _NESTEDOPTIONTYPE_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.NestedOptionType.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _NESTEDOPTIONTYPE,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.NestedOptionType)
+  })
+_sym_db.RegisterMessage(NestedOptionType)
+_sym_db.RegisterMessage(NestedOptionType.NestedMessage)
+
+OldOptionType = _reflection.GeneratedProtocolMessageType('OldOptionType', (_message.Message,), {
+  'DESCRIPTOR' : _OLDOPTIONTYPE,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.OldOptionType)
+  })
+_sym_db.RegisterMessage(OldOptionType)
+
+NewOptionType = _reflection.GeneratedProtocolMessageType('NewOptionType', (_message.Message,), {
+  'DESCRIPTOR' : _NEWOPTIONTYPE,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.NewOptionType)
+  })
+_sym_db.RegisterMessage(NewOptionType)
+
+TestMessageWithRequiredEnumOption = _reflection.GeneratedProtocolMessageType('TestMessageWithRequiredEnumOption', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGEWITHREQUIREDENUMOPTION,
+  '__module__' : 'google.protobuf.unittest_custom_options_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMessageWithRequiredEnumOption)
+  })
+_sym_db.RegisterMessage(TestMessageWithRequiredEnumOption)
+
+google_dot_protobuf_dot_descriptor__pb2.FileOptions.RegisterExtension(file_opt1)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(message_opt1)
+google_dot_protobuf_dot_descriptor__pb2.FieldOptions.RegisterExtension(field_opt1)
+google_dot_protobuf_dot_descriptor__pb2.FieldOptions.RegisterExtension(field_opt2)
+google_dot_protobuf_dot_descriptor__pb2.OneofOptions.RegisterExtension(oneof_opt1)
+google_dot_protobuf_dot_descriptor__pb2.EnumOptions.RegisterExtension(enum_opt1)
+google_dot_protobuf_dot_descriptor__pb2.EnumValueOptions.RegisterExtension(enum_value_opt1)
+google_dot_protobuf_dot_descriptor__pb2.ServiceOptions.RegisterExtension(service_opt1)
+method_opt1.enum_type = _METHODOPT1
+google_dot_protobuf_dot_descriptor__pb2.MethodOptions.RegisterExtension(method_opt1)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(bool_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(int32_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(int64_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(uint32_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(uint64_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(sint32_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(sint64_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(fixed32_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(fixed64_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(sfixed32_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(sfixed64_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(float_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(double_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(string_opt)
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(bytes_opt)
+enum_opt.enum_type = _DUMMYMESSAGECONTAININGENUM_TESTENUMTYPE
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(enum_opt)
+message_type_opt.message_type = _DUMMYMESSAGEINVALIDASOPTIONTYPE
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(message_type_opt)
+ComplexOptionType1.RegisterExtension(quux)
+corge.message_type = _COMPLEXOPTIONTYPE3
+ComplexOptionType1.RegisterExtension(corge)
+ComplexOptionType2.RegisterExtension(grault)
+garply.message_type = _COMPLEXOPTIONTYPE1
+ComplexOptionType2.RegisterExtension(garply)
+complex_opt1.message_type = _COMPLEXOPTIONTYPE1
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(complex_opt1)
+complex_opt2.message_type = _COMPLEXOPTIONTYPE2
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(complex_opt2)
+complex_opt3.message_type = _COMPLEXOPTIONTYPE3
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(complex_opt3)
+complexopt6.message_type = _COMPLEXOPT6
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(complexopt6)
+fileopt.message_type = _AGGREGATE
+google_dot_protobuf_dot_descriptor__pb2.FileOptions.RegisterExtension(fileopt)
+msgopt.message_type = _AGGREGATE
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(msgopt)
+fieldopt.message_type = _AGGREGATE
+google_dot_protobuf_dot_descriptor__pb2.FieldOptions.RegisterExtension(fieldopt)
+enumopt.message_type = _AGGREGATE
+google_dot_protobuf_dot_descriptor__pb2.EnumOptions.RegisterExtension(enumopt)
+enumvalopt.message_type = _AGGREGATE
+google_dot_protobuf_dot_descriptor__pb2.EnumValueOptions.RegisterExtension(enumvalopt)
+serviceopt.message_type = _AGGREGATE
+google_dot_protobuf_dot_descriptor__pb2.ServiceOptions.RegisterExtension(serviceopt)
+methodopt.message_type = _AGGREGATE
+google_dot_protobuf_dot_descriptor__pb2.MethodOptions.RegisterExtension(methodopt)
+required_enum_opt.message_type = _OLDOPTIONTYPE
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(required_enum_opt)
+_COMPLEXOPTIONTYPE2_COMPLEXOPTIONTYPE4.extensions_by_name['complex_opt4'].message_type = _COMPLEXOPTIONTYPE2_COMPLEXOPTIONTYPE4
+google_dot_protobuf_dot_descriptor__pb2.MessageOptions.RegisterExtension(_COMPLEXOPTIONTYPE2_COMPLEXOPTIONTYPE4.extensions_by_name['complex_opt4'])
+_AGGREGATEMESSAGESETELEMENT.extensions_by_name['message_set_extension'].message_type = _AGGREGATEMESSAGESETELEMENT
+AggregateMessageSet.RegisterExtension(_AGGREGATEMESSAGESETELEMENT.extensions_by_name['message_set_extension'])
+_AGGREGATE.extensions_by_name['nested'].message_type = _AGGREGATE
+google_dot_protobuf_dot_descriptor__pb2.FileOptions.RegisterExtension(_AGGREGATE.extensions_by_name['nested'])
+google_dot_protobuf_dot_descriptor__pb2.FileOptions.RegisterExtension(_NESTEDOPTIONTYPE.extensions_by_name['nested_extension'])
+
+DESCRIPTOR._options = None
+_AGGREGATEENUM._options = None
+_AGGREGATEENUM.values_by_name["VALUE"]._options = None
+_TESTMESSAGEWITHCUSTOMOPTIONS.oneofs_by_name['AnOneof']._options = None
+_TESTMESSAGEWITHCUSTOMOPTIONS_ANENUM._options = None
+_TESTMESSAGEWITHCUSTOMOPTIONS_ANENUM.values_by_name["ANENUM_VAL2"]._options = None
+_TESTMESSAGEWITHCUSTOMOPTIONS.fields_by_name['field1']._options = None
+_TESTMESSAGEWITHCUSTOMOPTIONS._options = None
+_CUSTOMOPTIONMININTEGERVALUES._options = None
+_CUSTOMOPTIONMAXINTEGERVALUES._options = None
+_CUSTOMOPTIONOTHERVALUES._options = None
+_SETTINGREALSFROMPOSITIVEINTS._options = None
+_SETTINGREALSFROMNEGATIVEINTS._options = None
+_VARIOUSCOMPLEXOPTIONS._options = None
+_AGGREGATEMESSAGESET._options = None
+_AGGREGATEMESSAGE.fields_by_name['fieldname']._options = None
+_AGGREGATEMESSAGE._options = None
+_NESTEDOPTIONTYPE_NESTEDMESSAGE.fields_by_name['nested_field']._options = None
+_NESTEDOPTIONTYPE_NESTEDMESSAGE._options = None
+_NESTEDOPTIONTYPE_NESTEDENUM._options = None
+_NESTEDOPTIONTYPE_NESTEDENUM.values_by_name["NESTED_ENUM_VALUE"]._options = None
+_NESTEDOPTIONTYPE.extensions_by_name['nested_extension']._options = None
+_TESTMESSAGEWITHREQUIREDENUMOPTION._options = None
+
+_TESTSERVICEWITHCUSTOMOPTIONS = _descriptor.ServiceDescriptor(
+  name='TestServiceWithCustomOptions',
+  full_name='protobuf_unittest.TestServiceWithCustomOptions',
+  file=DESCRIPTOR,
+  index=0,
+  serialized_options=b'\220\262\213\036\323\333\200\313I',
+  create_key=_descriptor._internal_create_key,
+  serialized_start=3142,
+  serialized_end=3284,
+  methods=[
+  _descriptor.MethodDescriptor(
+    name='Foo',
+    full_name='protobuf_unittest.TestServiceWithCustomOptions.Foo',
+    index=0,
+    containing_service=None,
+    input_type=_CUSTOMOPTIONFOOREQUEST,
+    output_type=_CUSTOMOPTIONFOORESPONSE,
+    serialized_options=b'\340\372\214\036\002',
+    create_key=_descriptor._internal_create_key,
+  ),
+])
+_sym_db.RegisterServiceDescriptor(_TESTSERVICEWITHCUSTOMOPTIONS)
+
+DESCRIPTOR.services_by_name['TestServiceWithCustomOptions'] = _TESTSERVICEWITHCUSTOMOPTIONS
+
+
+_AGGREGATESERVICE = _descriptor.ServiceDescriptor(
+  name='AggregateService',
+  full_name='protobuf_unittest.AggregateService',
+  file=DESCRIPTOR,
+  index=1,
+  serialized_options=b'\312\373\216;\023\022\021ServiceAnnotation',
+  create_key=_descriptor._internal_create_key,
+  serialized_start=3287,
+  serialized_end=3440,
+  methods=[
+  _descriptor.MethodDescriptor(
+    name='Method',
+    full_name='protobuf_unittest.AggregateService.Method',
+    index=0,
+    containing_service=None,
+    input_type=_AGGREGATEMESSAGE,
+    output_type=_AGGREGATEMESSAGE,
+    serialized_options=b'\312\310\226;\022\022\020MethodAnnotation',
+    create_key=_descriptor._internal_create_key,
+  ),
+])
+_sym_db.RegisterServiceDescriptor(_AGGREGATESERVICE)
+
+DESCRIPTOR.services_by_name['AggregateService'] = _AGGREGATESERVICE
+
+TestServiceWithCustomOptions = service_reflection.GeneratedServiceType('TestServiceWithCustomOptions', (_service.Service,), dict(
+  DESCRIPTOR = _TESTSERVICEWITHCUSTOMOPTIONS,
+  __module__ = 'google.protobuf.unittest_custom_options_pb2'
+  ))
+
+TestServiceWithCustomOptions_Stub = service_reflection.GeneratedServiceStubType('TestServiceWithCustomOptions_Stub', (TestServiceWithCustomOptions,), dict(
+  DESCRIPTOR = _TESTSERVICEWITHCUSTOMOPTIONS,
+  __module__ = 'google.protobuf.unittest_custom_options_pb2'
+  ))
+
+
+AggregateService = service_reflection.GeneratedServiceType('AggregateService', (_service.Service,), dict(
+  DESCRIPTOR = _AGGREGATESERVICE,
+  __module__ = 'google.protobuf.unittest_custom_options_pb2'
+  ))
+
+AggregateService_Stub = service_reflection.GeneratedServiceStubType('AggregateService_Stub', (AggregateService,), dict(
+  DESCRIPTOR = _AGGREGATESERVICE,
+  __module__ = 'google.protobuf.unittest_custom_options_pb2'
+  ))
+
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_import_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_import_pb2.py
new file mode 100644
index 0000000..17d321f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_import_pb2.py
@@ -0,0 +1,146 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/unittest_import.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import unittest_import_public_pb2 as google_dot_protobuf_dot_unittest__import__public__pb2
+
+from google.protobuf.unittest_import_public_pb2 import *
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/unittest_import.proto',
+  package='protobuf_unittest_import',
+  syntax='proto2',
+  serialized_options=b'\n\030com.google.protobuf.testH\001\370\001\001',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n%google/protobuf/unittest_import.proto\x12\x18protobuf_unittest_import\x1a,google/protobuf/unittest_import_public.proto\"\x1a\n\rImportMessage\x12\t\n\x01\x64\x18\x01 \x01(\x05*<\n\nImportEnum\x12\x0e\n\nIMPORT_FOO\x10\x07\x12\x0e\n\nIMPORT_BAR\x10\x08\x12\x0e\n\nIMPORT_BAZ\x10\t*1\n\x10ImportEnumForMap\x12\x0b\n\x07UNKNOWN\x10\x00\x12\x07\n\x03\x46OO\x10\x01\x12\x07\n\x03\x42\x41R\x10\x02\x42\x1f\n\x18\x63om.google.protobuf.testH\x01\xf8\x01\x01P\x00'
+  ,
+  dependencies=[google_dot_protobuf_dot_unittest__import__public__pb2.DESCRIPTOR,],
+  public_dependencies=[google_dot_protobuf_dot_unittest__import__public__pb2.DESCRIPTOR,])
+
+_IMPORTENUM = _descriptor.EnumDescriptor(
+  name='ImportEnum',
+  full_name='protobuf_unittest_import.ImportEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='IMPORT_FOO', index=0, number=7,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='IMPORT_BAR', index=1, number=8,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='IMPORT_BAZ', index=2, number=9,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=141,
+  serialized_end=201,
+)
+_sym_db.RegisterEnumDescriptor(_IMPORTENUM)
+
+ImportEnum = enum_type_wrapper.EnumTypeWrapper(_IMPORTENUM)
+_IMPORTENUMFORMAP = _descriptor.EnumDescriptor(
+  name='ImportEnumForMap',
+  full_name='protobuf_unittest_import.ImportEnumForMap',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='UNKNOWN', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOO', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=203,
+  serialized_end=252,
+)
+_sym_db.RegisterEnumDescriptor(_IMPORTENUMFORMAP)
+
+ImportEnumForMap = enum_type_wrapper.EnumTypeWrapper(_IMPORTENUMFORMAP)
+IMPORT_FOO = 7
+IMPORT_BAR = 8
+IMPORT_BAZ = 9
+UNKNOWN = 0
+FOO = 1
+BAR = 2
+
+
+
+_IMPORTMESSAGE = _descriptor.Descriptor(
+  name='ImportMessage',
+  full_name='protobuf_unittest_import.ImportMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='d', full_name='protobuf_unittest_import.ImportMessage.d', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=113,
+  serialized_end=139,
+)
+
+DESCRIPTOR.message_types_by_name['ImportMessage'] = _IMPORTMESSAGE
+DESCRIPTOR.enum_types_by_name['ImportEnum'] = _IMPORTENUM
+DESCRIPTOR.enum_types_by_name['ImportEnumForMap'] = _IMPORTENUMFORMAP
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+ImportMessage = _reflection.GeneratedProtocolMessageType('ImportMessage', (_message.Message,), {
+  'DESCRIPTOR' : _IMPORTMESSAGE,
+  '__module__' : 'google.protobuf.unittest_import_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest_import.ImportMessage)
+  })
+_sym_db.RegisterMessage(ImportMessage)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_import_public_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_import_public_pb2.py
new file mode 100644
index 0000000..6fdd8a8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_import_public_pb2.py
@@ -0,0 +1,71 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/unittest_import_public.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/unittest_import_public.proto',
+  package='protobuf_unittest_import',
+  syntax='proto2',
+  serialized_options=b'\n\030com.google.protobuf.test',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n,google/protobuf/unittest_import_public.proto\x12\x18protobuf_unittest_import\" \n\x13PublicImportMessage\x12\t\n\x01\x65\x18\x01 \x01(\x05\x42\x1a\n\x18\x63om.google.protobuf.test'
+)
+
+
+
+
+_PUBLICIMPORTMESSAGE = _descriptor.Descriptor(
+  name='PublicImportMessage',
+  full_name='protobuf_unittest_import.PublicImportMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='e', full_name='protobuf_unittest_import.PublicImportMessage.e', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=74,
+  serialized_end=106,
+)
+
+DESCRIPTOR.message_types_by_name['PublicImportMessage'] = _PUBLICIMPORTMESSAGE
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+PublicImportMessage = _reflection.GeneratedProtocolMessageType('PublicImportMessage', (_message.Message,), {
+  'DESCRIPTOR' : _PUBLICIMPORTMESSAGE,
+  '__module__' : 'google.protobuf.unittest_import_public_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest_import.PublicImportMessage)
+  })
+_sym_db.RegisterMessage(PublicImportMessage)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_mset_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_mset_pb2.py
new file mode 100644
index 0000000..aa800c1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_mset_pb2.py
@@ -0,0 +1,276 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/unittest_mset.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import unittest_mset_wire_format_pb2 as google_dot_protobuf_dot_unittest__mset__wire__format__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/unittest_mset.proto',
+  package='protobuf_unittest',
+  syntax='proto2',
+  serialized_options=b'H\001\370\001\001',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n#google/protobuf/unittest_mset.proto\x12\x11protobuf_unittest\x1a/google/protobuf/unittest_mset_wire_format.proto\"Z\n\x17TestMessageSetContainer\x12?\n\x0bmessage_set\x18\x01 \x01(\x0b\x32*.proto2_wireformat_unittest.TestMessageSet\"\xf9\x01\n\x18TestMessageSetExtension1\x12\t\n\x01i\x18\x0f \x01(\x05\x12=\n\trecursive\x18\x10 \x01(\x0b\x32*.proto2_wireformat_unittest.TestMessageSet\x12\x19\n\rtest_aliasing\x18\x11 \x01(\tB\x02\x08\x02\x32x\n\x15message_set_extension\x12*.proto2_wireformat_unittest.TestMessageSet\x18\xb0\xa6^ \x01(\x0b\x32+.protobuf_unittest.TestMessageSetExtension1\"\xa1\x01\n\x18TestMessageSetExtension2\x12\x0b\n\x03str\x18\x19 \x01(\t2x\n\x15message_set_extension\x12*.proto2_wireformat_unittest.TestMessageSet\x18\xf9\xbb^ \x01(\x0b\x32+.protobuf_unittest.TestMessageSetExtension2\"n\n\rRawMessageSet\x12\x33\n\x04item\x18\x01 \x03(\n2%.protobuf_unittest.RawMessageSet.Item\x1a(\n\x04Item\x12\x0f\n\x07type_id\x18\x02 \x02(\x05\x12\x0f\n\x07message\x18\x03 \x02(\x0c\x42\x05H\x01\xf8\x01\x01'
+  ,
+  dependencies=[google_dot_protobuf_dot_unittest__mset__wire__format__pb2.DESCRIPTOR,])
+
+
+
+
+_TESTMESSAGESETCONTAINER = _descriptor.Descriptor(
+  name='TestMessageSetContainer',
+  full_name='protobuf_unittest.TestMessageSetContainer',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='message_set', full_name='protobuf_unittest.TestMessageSetContainer.message_set', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=107,
+  serialized_end=197,
+)
+
+
+_TESTMESSAGESETEXTENSION1 = _descriptor.Descriptor(
+  name='TestMessageSetExtension1',
+  full_name='protobuf_unittest.TestMessageSetExtension1',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='i', full_name='protobuf_unittest.TestMessageSetExtension1.i', index=0,
+      number=15, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='recursive', full_name='protobuf_unittest.TestMessageSetExtension1.recursive', index=1,
+      number=16, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='test_aliasing', full_name='protobuf_unittest.TestMessageSetExtension1.test_aliasing', index=2,
+      number=17, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='message_set_extension', full_name='protobuf_unittest.TestMessageSetExtension1.message_set_extension', index=0,
+      number=1545008, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=200,
+  serialized_end=449,
+)
+
+
+_TESTMESSAGESETEXTENSION2 = _descriptor.Descriptor(
+  name='TestMessageSetExtension2',
+  full_name='protobuf_unittest.TestMessageSetExtension2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='str', full_name='protobuf_unittest.TestMessageSetExtension2.str', index=0,
+      number=25, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='message_set_extension', full_name='protobuf_unittest.TestMessageSetExtension2.message_set_extension', index=0,
+      number=1547769, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=452,
+  serialized_end=613,
+)
+
+
+_RAWMESSAGESET_ITEM = _descriptor.Descriptor(
+  name='Item',
+  full_name='protobuf_unittest.RawMessageSet.Item',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type_id', full_name='protobuf_unittest.RawMessageSet.Item.type_id', index=0,
+      number=2, type=5, cpp_type=1, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='message', full_name='protobuf_unittest.RawMessageSet.Item.message', index=1,
+      number=3, type=12, cpp_type=9, label=2,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=685,
+  serialized_end=725,
+)
+
+_RAWMESSAGESET = _descriptor.Descriptor(
+  name='RawMessageSet',
+  full_name='protobuf_unittest.RawMessageSet',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='item', full_name='protobuf_unittest.RawMessageSet.item', index=0,
+      number=1, type=10, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_RAWMESSAGESET_ITEM, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=615,
+  serialized_end=725,
+)
+
+_TESTMESSAGESETCONTAINER.fields_by_name['message_set'].message_type = google_dot_protobuf_dot_unittest__mset__wire__format__pb2._TESTMESSAGESET
+_TESTMESSAGESETEXTENSION1.fields_by_name['recursive'].message_type = google_dot_protobuf_dot_unittest__mset__wire__format__pb2._TESTMESSAGESET
+_RAWMESSAGESET_ITEM.containing_type = _RAWMESSAGESET
+_RAWMESSAGESET.fields_by_name['item'].message_type = _RAWMESSAGESET_ITEM
+DESCRIPTOR.message_types_by_name['TestMessageSetContainer'] = _TESTMESSAGESETCONTAINER
+DESCRIPTOR.message_types_by_name['TestMessageSetExtension1'] = _TESTMESSAGESETEXTENSION1
+DESCRIPTOR.message_types_by_name['TestMessageSetExtension2'] = _TESTMESSAGESETEXTENSION2
+DESCRIPTOR.message_types_by_name['RawMessageSet'] = _RAWMESSAGESET
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestMessageSetContainer = _reflection.GeneratedProtocolMessageType('TestMessageSetContainer', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGESETCONTAINER,
+  '__module__' : 'google.protobuf.unittest_mset_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMessageSetContainer)
+  })
+_sym_db.RegisterMessage(TestMessageSetContainer)
+
+TestMessageSetExtension1 = _reflection.GeneratedProtocolMessageType('TestMessageSetExtension1', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGESETEXTENSION1,
+  '__module__' : 'google.protobuf.unittest_mset_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMessageSetExtension1)
+  })
+_sym_db.RegisterMessage(TestMessageSetExtension1)
+
+TestMessageSetExtension2 = _reflection.GeneratedProtocolMessageType('TestMessageSetExtension2', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGESETEXTENSION2,
+  '__module__' : 'google.protobuf.unittest_mset_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMessageSetExtension2)
+  })
+_sym_db.RegisterMessage(TestMessageSetExtension2)
+
+RawMessageSet = _reflection.GeneratedProtocolMessageType('RawMessageSet', (_message.Message,), {
+
+  'Item' : _reflection.GeneratedProtocolMessageType('Item', (_message.Message,), {
+    'DESCRIPTOR' : _RAWMESSAGESET_ITEM,
+    '__module__' : 'google.protobuf.unittest_mset_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.RawMessageSet.Item)
+    })
+  ,
+  'DESCRIPTOR' : _RAWMESSAGESET,
+  '__module__' : 'google.protobuf.unittest_mset_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.RawMessageSet)
+  })
+_sym_db.RegisterMessage(RawMessageSet)
+_sym_db.RegisterMessage(RawMessageSet.Item)
+
+_TESTMESSAGESETEXTENSION1.extensions_by_name['message_set_extension'].message_type = _TESTMESSAGESETEXTENSION1
+google_dot_protobuf_dot_unittest__mset__wire__format__pb2.TestMessageSet.RegisterExtension(_TESTMESSAGESETEXTENSION1.extensions_by_name['message_set_extension'])
+_TESTMESSAGESETEXTENSION2.extensions_by_name['message_set_extension'].message_type = _TESTMESSAGESETEXTENSION2
+google_dot_protobuf_dot_unittest__mset__wire__format__pb2.TestMessageSet.RegisterExtension(_TESTMESSAGESETEXTENSION2.extensions_by_name['message_set_extension'])
+
+DESCRIPTOR._options = None
+_TESTMESSAGESETEXTENSION1.fields_by_name['test_aliasing']._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_mset_wire_format_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_mset_wire_format_pb2.py
new file mode 100644
index 0000000..8f5ae65
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_mset_wire_format_pb2.py
@@ -0,0 +1,106 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/unittest_mset_wire_format.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/unittest_mset_wire_format.proto',
+  package='proto2_wireformat_unittest',
+  syntax='proto2',
+  serialized_options=b'H\001\370\001\001\252\002!Google.ProtocolBuffers.TestProtos',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n/google/protobuf/unittest_mset_wire_format.proto\x12\x1aproto2_wireformat_unittest\"\x1e\n\x0eTestMessageSet*\x08\x08\x04\x10\xff\xff\xff\xff\x07:\x02\x08\x01\"d\n!TestMessageSetWireFormatContainer\x12?\n\x0bmessage_set\x18\x01 \x01(\x0b\x32*.proto2_wireformat_unittest.TestMessageSetB)H\x01\xf8\x01\x01\xaa\x02!Google.ProtocolBuffers.TestProtos'
+)
+
+
+
+
+_TESTMESSAGESET = _descriptor.Descriptor(
+  name='TestMessageSet',
+  full_name='proto2_wireformat_unittest.TestMessageSet',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\010\001',
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(4, 2147483647), ],
+  oneofs=[
+  ],
+  serialized_start=79,
+  serialized_end=109,
+)
+
+
+_TESTMESSAGESETWIREFORMATCONTAINER = _descriptor.Descriptor(
+  name='TestMessageSetWireFormatContainer',
+  full_name='proto2_wireformat_unittest.TestMessageSetWireFormatContainer',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='message_set', full_name='proto2_wireformat_unittest.TestMessageSetWireFormatContainer.message_set', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=111,
+  serialized_end=211,
+)
+
+_TESTMESSAGESETWIREFORMATCONTAINER.fields_by_name['message_set'].message_type = _TESTMESSAGESET
+DESCRIPTOR.message_types_by_name['TestMessageSet'] = _TESTMESSAGESET
+DESCRIPTOR.message_types_by_name['TestMessageSetWireFormatContainer'] = _TESTMESSAGESETWIREFORMATCONTAINER
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestMessageSet = _reflection.GeneratedProtocolMessageType('TestMessageSet', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGESET,
+  '__module__' : 'google.protobuf.unittest_mset_wire_format_pb2'
+  # @@protoc_insertion_point(class_scope:proto2_wireformat_unittest.TestMessageSet)
+  })
+_sym_db.RegisterMessage(TestMessageSet)
+
+TestMessageSetWireFormatContainer = _reflection.GeneratedProtocolMessageType('TestMessageSetWireFormatContainer', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGESETWIREFORMATCONTAINER,
+  '__module__' : 'google.protobuf.unittest_mset_wire_format_pb2'
+  # @@protoc_insertion_point(class_scope:proto2_wireformat_unittest.TestMessageSetWireFormatContainer)
+  })
+_sym_db.RegisterMessage(TestMessageSetWireFormatContainer)
+
+
+DESCRIPTOR._options = None
+_TESTMESSAGESET._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_no_generic_services_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_no_generic_services_pb2.py
new file mode 100644
index 0000000..c527c01
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_no_generic_services_pb2.py
@@ -0,0 +1,130 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/unittest_no_generic_services.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/unittest_no_generic_services.proto',
+  package='protobuf_unittest.no_generic_services_test',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n2google/protobuf/unittest_no_generic_services.proto\x12*protobuf_unittest.no_generic_services_test\"#\n\x0bTestMessage\x12\t\n\x01\x61\x18\x01 \x01(\x05*\t\x08\xe8\x07\x10\x80\x80\x80\x80\x02*\x13\n\x08TestEnum\x12\x07\n\x03\x46OO\x10\x01\x32\x86\x01\n\x0bTestService\x12w\n\x03\x46oo\x12\x37.protobuf_unittest.no_generic_services_test.TestMessage\x1a\x37.protobuf_unittest.no_generic_services_test.TestMessage:P\n\x0etest_extension\x12\x37.protobuf_unittest.no_generic_services_test.TestMessage\x18\xe8\x07 \x01(\x05'
+)
+
+_TESTENUM = _descriptor.EnumDescriptor(
+  name='TestEnum',
+  full_name='protobuf_unittest.no_generic_services_test.TestEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOO', index=0, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=135,
+  serialized_end=154,
+)
+_sym_db.RegisterEnumDescriptor(_TESTENUM)
+
+TestEnum = enum_type_wrapper.EnumTypeWrapper(_TESTENUM)
+FOO = 1
+
+TEST_EXTENSION_FIELD_NUMBER = 1000
+test_extension = _descriptor.FieldDescriptor(
+  name='test_extension', full_name='protobuf_unittest.no_generic_services_test.test_extension', index=0,
+  number=1000, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+
+_TESTMESSAGE = _descriptor.Descriptor(
+  name='TestMessage',
+  full_name='protobuf_unittest.no_generic_services_test.TestMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.no_generic_services_test.TestMessage.a', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=98,
+  serialized_end=133,
+)
+
+DESCRIPTOR.message_types_by_name['TestMessage'] = _TESTMESSAGE
+DESCRIPTOR.enum_types_by_name['TestEnum'] = _TESTENUM
+DESCRIPTOR.extensions_by_name['test_extension'] = test_extension
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestMessage = _reflection.GeneratedProtocolMessageType('TestMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGE,
+  '__module__' : 'google.protobuf.unittest_no_generic_services_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.no_generic_services_test.TestMessage)
+  })
+_sym_db.RegisterMessage(TestMessage)
+
+TestMessage.RegisterExtension(test_extension)
+
+
+_TESTSERVICE = _descriptor.ServiceDescriptor(
+  name='TestService',
+  full_name='protobuf_unittest.no_generic_services_test.TestService',
+  file=DESCRIPTOR,
+  index=0,
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_start=157,
+  serialized_end=291,
+  methods=[
+  _descriptor.MethodDescriptor(
+    name='Foo',
+    full_name='protobuf_unittest.no_generic_services_test.TestService.Foo',
+    index=0,
+    containing_service=None,
+    input_type=_TESTMESSAGE,
+    output_type=_TESTMESSAGE,
+    serialized_options=None,
+    create_key=_descriptor._internal_create_key,
+  ),
+])
+_sym_db.RegisterServiceDescriptor(_TESTSERVICE)
+
+DESCRIPTOR.services_by_name['TestService'] = _TESTSERVICE
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_pb2.py
new file mode 100644
index 0000000..7af1e00
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_pb2.py
@@ -0,0 +1,7957 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/unittest.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import service as _service
+from google.protobuf import service_reflection
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import unittest_import_pb2 as google_dot_protobuf_dot_unittest__import__pb2
+try:
+  google_dot_protobuf_dot_unittest__import__public__pb2 = google_dot_protobuf_dot_unittest__import__pb2.google_dot_protobuf_dot_unittest__import__public__pb2
+except AttributeError:
+  google_dot_protobuf_dot_unittest__import__public__pb2 = google_dot_protobuf_dot_unittest__import__pb2.google.protobuf.unittest_import_public_pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/unittest.proto',
+  package='protobuf_unittest',
+  syntax='proto2',
+  serialized_options=b'B\rUnittestProtoH\001\200\001\001\210\001\001\220\001\001\370\001\001',
+  create_key=_descriptor._internal_create_key,
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+  ,
+  dependencies=[google_dot_protobuf_dot_unittest__import__pb2.DESCRIPTOR,])
+
+_FOREIGNENUM = _descriptor.EnumDescriptor(
+  name='ForeignEnum',
+  full_name='protobuf_unittest.ForeignEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_FOO', index=0, number=4,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_BAR', index=1, number=5,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_BAZ', index=2, number=6,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=15397,
+  serialized_end=15461,
+)
+_sym_db.RegisterEnumDescriptor(_FOREIGNENUM)
+
+ForeignEnum = enum_type_wrapper.EnumTypeWrapper(_FOREIGNENUM)
+_TESTENUMWITHDUPVALUE = _descriptor.EnumDescriptor(
+  name='TestEnumWithDupValue',
+  full_name='protobuf_unittest.TestEnumWithDupValue',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOO1', index=0, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR1', index=1, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAZ', index=2, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOO2', index=3, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR2', index=4, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=b'\020\001',
+  serialized_start=15463,
+  serialized_end=15538,
+)
+_sym_db.RegisterEnumDescriptor(_TESTENUMWITHDUPVALUE)
+
+TestEnumWithDupValue = enum_type_wrapper.EnumTypeWrapper(_TESTENUMWITHDUPVALUE)
+_TESTSPARSEENUM = _descriptor.EnumDescriptor(
+  name='TestSparseEnum',
+  full_name='protobuf_unittest.TestSparseEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='SPARSE_A', index=0, number=123,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='SPARSE_B', index=1, number=62374,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='SPARSE_C', index=2, number=12589234,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='SPARSE_D', index=3, number=-15,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='SPARSE_E', index=4, number=-53452,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='SPARSE_F', index=5, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='SPARSE_G', index=6, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=15541,
+  serialized_end=15678,
+)
+_sym_db.RegisterEnumDescriptor(_TESTSPARSEENUM)
+
+TestSparseEnum = enum_type_wrapper.EnumTypeWrapper(_TESTSPARSEENUM)
+_VERYLARGEENUM = _descriptor.EnumDescriptor(
+  name='VeryLargeEnum',
+  full_name='protobuf_unittest.VeryLargeEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_DEFAULT', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_1', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_2', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_3', index=3, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_4', index=4, number=4,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_5', index=5, number=5,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_6', index=6, number=6,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_7', index=7, number=7,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_8', index=8, number=8,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_9', index=9, number=9,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_10', index=10, number=10,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_11', index=11, number=11,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_12', index=12, number=12,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_13', index=13, number=13,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_14', index=14, number=14,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_15', index=15, number=15,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_16', index=16, number=16,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_17', index=17, number=17,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_18', index=18, number=18,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_19', index=19, number=19,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_20', index=20, number=20,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_21', index=21, number=21,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_22', index=22, number=22,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_23', index=23, number=23,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_24', index=24, number=24,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_25', index=25, number=25,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_26', index=26, number=26,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_27', index=27, number=27,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_28', index=28, number=28,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_29', index=29, number=29,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_30', index=30, number=30,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_31', index=31, number=31,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_32', index=32, number=32,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_33', index=33, number=33,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_34', index=34, number=34,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_35', index=35, number=35,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_36', index=36, number=36,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_37', index=37, number=37,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_38', index=38, number=38,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_39', index=39, number=39,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_40', index=40, number=40,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_41', index=41, number=41,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_42', index=42, number=42,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_43', index=43, number=43,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_44', index=44, number=44,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_45', index=45, number=45,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_46', index=46, number=46,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_47', index=47, number=47,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_48', index=48, number=48,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_49', index=49, number=49,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_50', index=50, number=50,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_51', index=51, number=51,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_52', index=52, number=52,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_53', index=53, number=53,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_54', index=54, number=54,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_55', index=55, number=55,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_56', index=56, number=56,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_57', index=57, number=57,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_58', index=58, number=58,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_59', index=59, number=59,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_60', index=60, number=60,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_61', index=61, number=61,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_62', index=62, number=62,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_63', index=63, number=63,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_64', index=64, number=64,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_65', index=65, number=65,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_66', index=66, number=66,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_67', index=67, number=67,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_68', index=68, number=68,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_69', index=69, number=69,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_70', index=70, number=70,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_71', index=71, number=71,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_72', index=72, number=72,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_73', index=73, number=73,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_74', index=74, number=74,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_75', index=75, number=75,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_76', index=76, number=76,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_77', index=77, number=77,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_78', index=78, number=78,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_79', index=79, number=79,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_80', index=80, number=80,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_81', index=81, number=81,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_82', index=82, number=82,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_83', index=83, number=83,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_84', index=84, number=84,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_85', index=85, number=85,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_86', index=86, number=86,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_87', index=87, number=87,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_88', index=88, number=88,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_89', index=89, number=89,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_90', index=90, number=90,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_91', index=91, number=91,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_92', index=92, number=92,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_93', index=93, number=93,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_94', index=94, number=94,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_95', index=95, number=95,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_96', index=96, number=96,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_97', index=97, number=97,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_98', index=98, number=98,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_99', index=99, number=99,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM_LABEL_100', index=100, number=100,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=15681,
+  serialized_end=17612,
+)
+_sym_db.RegisterEnumDescriptor(_VERYLARGEENUM)
+
+VeryLargeEnum = enum_type_wrapper.EnumTypeWrapper(_VERYLARGEENUM)
+FOREIGN_FOO = 4
+FOREIGN_BAR = 5
+FOREIGN_BAZ = 6
+FOO1 = 1
+BAR1 = 2
+BAZ = 3
+FOO2 = 1
+BAR2 = 2
+SPARSE_A = 123
+SPARSE_B = 62374
+SPARSE_C = 12589234
+SPARSE_D = -15
+SPARSE_E = -53452
+SPARSE_F = 0
+SPARSE_G = 2
+ENUM_LABEL_DEFAULT = 0
+ENUM_LABEL_1 = 1
+ENUM_LABEL_2 = 2
+ENUM_LABEL_3 = 3
+ENUM_LABEL_4 = 4
+ENUM_LABEL_5 = 5
+ENUM_LABEL_6 = 6
+ENUM_LABEL_7 = 7
+ENUM_LABEL_8 = 8
+ENUM_LABEL_9 = 9
+ENUM_LABEL_10 = 10
+ENUM_LABEL_11 = 11
+ENUM_LABEL_12 = 12
+ENUM_LABEL_13 = 13
+ENUM_LABEL_14 = 14
+ENUM_LABEL_15 = 15
+ENUM_LABEL_16 = 16
+ENUM_LABEL_17 = 17
+ENUM_LABEL_18 = 18
+ENUM_LABEL_19 = 19
+ENUM_LABEL_20 = 20
+ENUM_LABEL_21 = 21
+ENUM_LABEL_22 = 22
+ENUM_LABEL_23 = 23
+ENUM_LABEL_24 = 24
+ENUM_LABEL_25 = 25
+ENUM_LABEL_26 = 26
+ENUM_LABEL_27 = 27
+ENUM_LABEL_28 = 28
+ENUM_LABEL_29 = 29
+ENUM_LABEL_30 = 30
+ENUM_LABEL_31 = 31
+ENUM_LABEL_32 = 32
+ENUM_LABEL_33 = 33
+ENUM_LABEL_34 = 34
+ENUM_LABEL_35 = 35
+ENUM_LABEL_36 = 36
+ENUM_LABEL_37 = 37
+ENUM_LABEL_38 = 38
+ENUM_LABEL_39 = 39
+ENUM_LABEL_40 = 40
+ENUM_LABEL_41 = 41
+ENUM_LABEL_42 = 42
+ENUM_LABEL_43 = 43
+ENUM_LABEL_44 = 44
+ENUM_LABEL_45 = 45
+ENUM_LABEL_46 = 46
+ENUM_LABEL_47 = 47
+ENUM_LABEL_48 = 48
+ENUM_LABEL_49 = 49
+ENUM_LABEL_50 = 50
+ENUM_LABEL_51 = 51
+ENUM_LABEL_52 = 52
+ENUM_LABEL_53 = 53
+ENUM_LABEL_54 = 54
+ENUM_LABEL_55 = 55
+ENUM_LABEL_56 = 56
+ENUM_LABEL_57 = 57
+ENUM_LABEL_58 = 58
+ENUM_LABEL_59 = 59
+ENUM_LABEL_60 = 60
+ENUM_LABEL_61 = 61
+ENUM_LABEL_62 = 62
+ENUM_LABEL_63 = 63
+ENUM_LABEL_64 = 64
+ENUM_LABEL_65 = 65
+ENUM_LABEL_66 = 66
+ENUM_LABEL_67 = 67
+ENUM_LABEL_68 = 68
+ENUM_LABEL_69 = 69
+ENUM_LABEL_70 = 70
+ENUM_LABEL_71 = 71
+ENUM_LABEL_72 = 72
+ENUM_LABEL_73 = 73
+ENUM_LABEL_74 = 74
+ENUM_LABEL_75 = 75
+ENUM_LABEL_76 = 76
+ENUM_LABEL_77 = 77
+ENUM_LABEL_78 = 78
+ENUM_LABEL_79 = 79
+ENUM_LABEL_80 = 80
+ENUM_LABEL_81 = 81
+ENUM_LABEL_82 = 82
+ENUM_LABEL_83 = 83
+ENUM_LABEL_84 = 84
+ENUM_LABEL_85 = 85
+ENUM_LABEL_86 = 86
+ENUM_LABEL_87 = 87
+ENUM_LABEL_88 = 88
+ENUM_LABEL_89 = 89
+ENUM_LABEL_90 = 90
+ENUM_LABEL_91 = 91
+ENUM_LABEL_92 = 92
+ENUM_LABEL_93 = 93
+ENUM_LABEL_94 = 94
+ENUM_LABEL_95 = 95
+ENUM_LABEL_96 = 96
+ENUM_LABEL_97 = 97
+ENUM_LABEL_98 = 98
+ENUM_LABEL_99 = 99
+ENUM_LABEL_100 = 100
+
+OPTIONAL_INT32_EXTENSION_FIELD_NUMBER = 1
+optional_int32_extension = _descriptor.FieldDescriptor(
+  name='optional_int32_extension', full_name='protobuf_unittest.optional_int32_extension', index=0,
+  number=1, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_INT64_EXTENSION_FIELD_NUMBER = 2
+optional_int64_extension = _descriptor.FieldDescriptor(
+  name='optional_int64_extension', full_name='protobuf_unittest.optional_int64_extension', index=1,
+  number=2, type=3, cpp_type=2, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_UINT32_EXTENSION_FIELD_NUMBER = 3
+optional_uint32_extension = _descriptor.FieldDescriptor(
+  name='optional_uint32_extension', full_name='protobuf_unittest.optional_uint32_extension', index=2,
+  number=3, type=13, cpp_type=3, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_UINT64_EXTENSION_FIELD_NUMBER = 4
+optional_uint64_extension = _descriptor.FieldDescriptor(
+  name='optional_uint64_extension', full_name='protobuf_unittest.optional_uint64_extension', index=3,
+  number=4, type=4, cpp_type=4, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_SINT32_EXTENSION_FIELD_NUMBER = 5
+optional_sint32_extension = _descriptor.FieldDescriptor(
+  name='optional_sint32_extension', full_name='protobuf_unittest.optional_sint32_extension', index=4,
+  number=5, type=17, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_SINT64_EXTENSION_FIELD_NUMBER = 6
+optional_sint64_extension = _descriptor.FieldDescriptor(
+  name='optional_sint64_extension', full_name='protobuf_unittest.optional_sint64_extension', index=5,
+  number=6, type=18, cpp_type=2, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_FIXED32_EXTENSION_FIELD_NUMBER = 7
+optional_fixed32_extension = _descriptor.FieldDescriptor(
+  name='optional_fixed32_extension', full_name='protobuf_unittest.optional_fixed32_extension', index=6,
+  number=7, type=7, cpp_type=3, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_FIXED64_EXTENSION_FIELD_NUMBER = 8
+optional_fixed64_extension = _descriptor.FieldDescriptor(
+  name='optional_fixed64_extension', full_name='protobuf_unittest.optional_fixed64_extension', index=7,
+  number=8, type=6, cpp_type=4, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_SFIXED32_EXTENSION_FIELD_NUMBER = 9
+optional_sfixed32_extension = _descriptor.FieldDescriptor(
+  name='optional_sfixed32_extension', full_name='protobuf_unittest.optional_sfixed32_extension', index=8,
+  number=9, type=15, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_SFIXED64_EXTENSION_FIELD_NUMBER = 10
+optional_sfixed64_extension = _descriptor.FieldDescriptor(
+  name='optional_sfixed64_extension', full_name='protobuf_unittest.optional_sfixed64_extension', index=9,
+  number=10, type=16, cpp_type=2, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_FLOAT_EXTENSION_FIELD_NUMBER = 11
+optional_float_extension = _descriptor.FieldDescriptor(
+  name='optional_float_extension', full_name='protobuf_unittest.optional_float_extension', index=10,
+  number=11, type=2, cpp_type=6, label=1,
+  has_default_value=False, default_value=float(0),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_DOUBLE_EXTENSION_FIELD_NUMBER = 12
+optional_double_extension = _descriptor.FieldDescriptor(
+  name='optional_double_extension', full_name='protobuf_unittest.optional_double_extension', index=11,
+  number=12, type=1, cpp_type=5, label=1,
+  has_default_value=False, default_value=float(0),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_BOOL_EXTENSION_FIELD_NUMBER = 13
+optional_bool_extension = _descriptor.FieldDescriptor(
+  name='optional_bool_extension', full_name='protobuf_unittest.optional_bool_extension', index=12,
+  number=13, type=8, cpp_type=7, label=1,
+  has_default_value=False, default_value=False,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_STRING_EXTENSION_FIELD_NUMBER = 14
+optional_string_extension = _descriptor.FieldDescriptor(
+  name='optional_string_extension', full_name='protobuf_unittest.optional_string_extension', index=13,
+  number=14, type=9, cpp_type=9, label=1,
+  has_default_value=False, default_value=b"".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_BYTES_EXTENSION_FIELD_NUMBER = 15
+optional_bytes_extension = _descriptor.FieldDescriptor(
+  name='optional_bytes_extension', full_name='protobuf_unittest.optional_bytes_extension', index=14,
+  number=15, type=12, cpp_type=9, label=1,
+  has_default_value=False, default_value=b"",
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONALGROUP_EXTENSION_FIELD_NUMBER = 16
+optionalgroup_extension = _descriptor.FieldDescriptor(
+  name='optionalgroup_extension', full_name='protobuf_unittest.optionalgroup_extension', index=15,
+  number=16, type=10, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_NESTED_MESSAGE_EXTENSION_FIELD_NUMBER = 18
+optional_nested_message_extension = _descriptor.FieldDescriptor(
+  name='optional_nested_message_extension', full_name='protobuf_unittest.optional_nested_message_extension', index=16,
+  number=18, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_FOREIGN_MESSAGE_EXTENSION_FIELD_NUMBER = 19
+optional_foreign_message_extension = _descriptor.FieldDescriptor(
+  name='optional_foreign_message_extension', full_name='protobuf_unittest.optional_foreign_message_extension', index=17,
+  number=19, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_IMPORT_MESSAGE_EXTENSION_FIELD_NUMBER = 20
+optional_import_message_extension = _descriptor.FieldDescriptor(
+  name='optional_import_message_extension', full_name='protobuf_unittest.optional_import_message_extension', index=18,
+  number=20, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_NESTED_ENUM_EXTENSION_FIELD_NUMBER = 21
+optional_nested_enum_extension = _descriptor.FieldDescriptor(
+  name='optional_nested_enum_extension', full_name='protobuf_unittest.optional_nested_enum_extension', index=19,
+  number=21, type=14, cpp_type=8, label=1,
+  has_default_value=False, default_value=1,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_FOREIGN_ENUM_EXTENSION_FIELD_NUMBER = 22
+optional_foreign_enum_extension = _descriptor.FieldDescriptor(
+  name='optional_foreign_enum_extension', full_name='protobuf_unittest.optional_foreign_enum_extension', index=20,
+  number=22, type=14, cpp_type=8, label=1,
+  has_default_value=False, default_value=4,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_IMPORT_ENUM_EXTENSION_FIELD_NUMBER = 23
+optional_import_enum_extension = _descriptor.FieldDescriptor(
+  name='optional_import_enum_extension', full_name='protobuf_unittest.optional_import_enum_extension', index=21,
+  number=23, type=14, cpp_type=8, label=1,
+  has_default_value=False, default_value=7,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_STRING_PIECE_EXTENSION_FIELD_NUMBER = 24
+optional_string_piece_extension = _descriptor.FieldDescriptor(
+  name='optional_string_piece_extension', full_name='protobuf_unittest.optional_string_piece_extension', index=22,
+  number=24, type=9, cpp_type=9, label=1,
+  has_default_value=False, default_value=b"".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_CORD_EXTENSION_FIELD_NUMBER = 25
+optional_cord_extension = _descriptor.FieldDescriptor(
+  name='optional_cord_extension', full_name='protobuf_unittest.optional_cord_extension', index=23,
+  number=25, type=9, cpp_type=9, label=1,
+  has_default_value=False, default_value=b"".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_PUBLIC_IMPORT_MESSAGE_EXTENSION_FIELD_NUMBER = 26
+optional_public_import_message_extension = _descriptor.FieldDescriptor(
+  name='optional_public_import_message_extension', full_name='protobuf_unittest.optional_public_import_message_extension', index=24,
+  number=26, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+OPTIONAL_LAZY_MESSAGE_EXTENSION_FIELD_NUMBER = 27
+optional_lazy_message_extension = _descriptor.FieldDescriptor(
+  name='optional_lazy_message_extension', full_name='protobuf_unittest.optional_lazy_message_extension', index=25,
+  number=27, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'(\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_INT32_EXTENSION_FIELD_NUMBER = 31
+repeated_int32_extension = _descriptor.FieldDescriptor(
+  name='repeated_int32_extension', full_name='protobuf_unittest.repeated_int32_extension', index=26,
+  number=31, type=5, cpp_type=1, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_INT64_EXTENSION_FIELD_NUMBER = 32
+repeated_int64_extension = _descriptor.FieldDescriptor(
+  name='repeated_int64_extension', full_name='protobuf_unittest.repeated_int64_extension', index=27,
+  number=32, type=3, cpp_type=2, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_UINT32_EXTENSION_FIELD_NUMBER = 33
+repeated_uint32_extension = _descriptor.FieldDescriptor(
+  name='repeated_uint32_extension', full_name='protobuf_unittest.repeated_uint32_extension', index=28,
+  number=33, type=13, cpp_type=3, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_UINT64_EXTENSION_FIELD_NUMBER = 34
+repeated_uint64_extension = _descriptor.FieldDescriptor(
+  name='repeated_uint64_extension', full_name='protobuf_unittest.repeated_uint64_extension', index=29,
+  number=34, type=4, cpp_type=4, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_SINT32_EXTENSION_FIELD_NUMBER = 35
+repeated_sint32_extension = _descriptor.FieldDescriptor(
+  name='repeated_sint32_extension', full_name='protobuf_unittest.repeated_sint32_extension', index=30,
+  number=35, type=17, cpp_type=1, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_SINT64_EXTENSION_FIELD_NUMBER = 36
+repeated_sint64_extension = _descriptor.FieldDescriptor(
+  name='repeated_sint64_extension', full_name='protobuf_unittest.repeated_sint64_extension', index=31,
+  number=36, type=18, cpp_type=2, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_FIXED32_EXTENSION_FIELD_NUMBER = 37
+repeated_fixed32_extension = _descriptor.FieldDescriptor(
+  name='repeated_fixed32_extension', full_name='protobuf_unittest.repeated_fixed32_extension', index=32,
+  number=37, type=7, cpp_type=3, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_FIXED64_EXTENSION_FIELD_NUMBER = 38
+repeated_fixed64_extension = _descriptor.FieldDescriptor(
+  name='repeated_fixed64_extension', full_name='protobuf_unittest.repeated_fixed64_extension', index=33,
+  number=38, type=6, cpp_type=4, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_SFIXED32_EXTENSION_FIELD_NUMBER = 39
+repeated_sfixed32_extension = _descriptor.FieldDescriptor(
+  name='repeated_sfixed32_extension', full_name='protobuf_unittest.repeated_sfixed32_extension', index=34,
+  number=39, type=15, cpp_type=1, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_SFIXED64_EXTENSION_FIELD_NUMBER = 40
+repeated_sfixed64_extension = _descriptor.FieldDescriptor(
+  name='repeated_sfixed64_extension', full_name='protobuf_unittest.repeated_sfixed64_extension', index=35,
+  number=40, type=16, cpp_type=2, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_FLOAT_EXTENSION_FIELD_NUMBER = 41
+repeated_float_extension = _descriptor.FieldDescriptor(
+  name='repeated_float_extension', full_name='protobuf_unittest.repeated_float_extension', index=36,
+  number=41, type=2, cpp_type=6, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_DOUBLE_EXTENSION_FIELD_NUMBER = 42
+repeated_double_extension = _descriptor.FieldDescriptor(
+  name='repeated_double_extension', full_name='protobuf_unittest.repeated_double_extension', index=37,
+  number=42, type=1, cpp_type=5, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_BOOL_EXTENSION_FIELD_NUMBER = 43
+repeated_bool_extension = _descriptor.FieldDescriptor(
+  name='repeated_bool_extension', full_name='protobuf_unittest.repeated_bool_extension', index=38,
+  number=43, type=8, cpp_type=7, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_STRING_EXTENSION_FIELD_NUMBER = 44
+repeated_string_extension = _descriptor.FieldDescriptor(
+  name='repeated_string_extension', full_name='protobuf_unittest.repeated_string_extension', index=39,
+  number=44, type=9, cpp_type=9, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_BYTES_EXTENSION_FIELD_NUMBER = 45
+repeated_bytes_extension = _descriptor.FieldDescriptor(
+  name='repeated_bytes_extension', full_name='protobuf_unittest.repeated_bytes_extension', index=40,
+  number=45, type=12, cpp_type=9, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATEDGROUP_EXTENSION_FIELD_NUMBER = 46
+repeatedgroup_extension = _descriptor.FieldDescriptor(
+  name='repeatedgroup_extension', full_name='protobuf_unittest.repeatedgroup_extension', index=41,
+  number=46, type=10, cpp_type=10, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_NESTED_MESSAGE_EXTENSION_FIELD_NUMBER = 48
+repeated_nested_message_extension = _descriptor.FieldDescriptor(
+  name='repeated_nested_message_extension', full_name='protobuf_unittest.repeated_nested_message_extension', index=42,
+  number=48, type=11, cpp_type=10, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_FOREIGN_MESSAGE_EXTENSION_FIELD_NUMBER = 49
+repeated_foreign_message_extension = _descriptor.FieldDescriptor(
+  name='repeated_foreign_message_extension', full_name='protobuf_unittest.repeated_foreign_message_extension', index=43,
+  number=49, type=11, cpp_type=10, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_IMPORT_MESSAGE_EXTENSION_FIELD_NUMBER = 50
+repeated_import_message_extension = _descriptor.FieldDescriptor(
+  name='repeated_import_message_extension', full_name='protobuf_unittest.repeated_import_message_extension', index=44,
+  number=50, type=11, cpp_type=10, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_NESTED_ENUM_EXTENSION_FIELD_NUMBER = 51
+repeated_nested_enum_extension = _descriptor.FieldDescriptor(
+  name='repeated_nested_enum_extension', full_name='protobuf_unittest.repeated_nested_enum_extension', index=45,
+  number=51, type=14, cpp_type=8, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_FOREIGN_ENUM_EXTENSION_FIELD_NUMBER = 52
+repeated_foreign_enum_extension = _descriptor.FieldDescriptor(
+  name='repeated_foreign_enum_extension', full_name='protobuf_unittest.repeated_foreign_enum_extension', index=46,
+  number=52, type=14, cpp_type=8, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_IMPORT_ENUM_EXTENSION_FIELD_NUMBER = 53
+repeated_import_enum_extension = _descriptor.FieldDescriptor(
+  name='repeated_import_enum_extension', full_name='protobuf_unittest.repeated_import_enum_extension', index=47,
+  number=53, type=14, cpp_type=8, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_STRING_PIECE_EXTENSION_FIELD_NUMBER = 54
+repeated_string_piece_extension = _descriptor.FieldDescriptor(
+  name='repeated_string_piece_extension', full_name='protobuf_unittest.repeated_string_piece_extension', index=48,
+  number=54, type=9, cpp_type=9, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_CORD_EXTENSION_FIELD_NUMBER = 55
+repeated_cord_extension = _descriptor.FieldDescriptor(
+  name='repeated_cord_extension', full_name='protobuf_unittest.repeated_cord_extension', index=49,
+  number=55, type=9, cpp_type=9, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+REPEATED_LAZY_MESSAGE_EXTENSION_FIELD_NUMBER = 57
+repeated_lazy_message_extension = _descriptor.FieldDescriptor(
+  name='repeated_lazy_message_extension', full_name='protobuf_unittest.repeated_lazy_message_extension', index=50,
+  number=57, type=11, cpp_type=10, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'(\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_INT32_EXTENSION_FIELD_NUMBER = 61
+default_int32_extension = _descriptor.FieldDescriptor(
+  name='default_int32_extension', full_name='protobuf_unittest.default_int32_extension', index=51,
+  number=61, type=5, cpp_type=1, label=1,
+  has_default_value=True, default_value=41,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_INT64_EXTENSION_FIELD_NUMBER = 62
+default_int64_extension = _descriptor.FieldDescriptor(
+  name='default_int64_extension', full_name='protobuf_unittest.default_int64_extension', index=52,
+  number=62, type=3, cpp_type=2, label=1,
+  has_default_value=True, default_value=42,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_UINT32_EXTENSION_FIELD_NUMBER = 63
+default_uint32_extension = _descriptor.FieldDescriptor(
+  name='default_uint32_extension', full_name='protobuf_unittest.default_uint32_extension', index=53,
+  number=63, type=13, cpp_type=3, label=1,
+  has_default_value=True, default_value=43,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_UINT64_EXTENSION_FIELD_NUMBER = 64
+default_uint64_extension = _descriptor.FieldDescriptor(
+  name='default_uint64_extension', full_name='protobuf_unittest.default_uint64_extension', index=54,
+  number=64, type=4, cpp_type=4, label=1,
+  has_default_value=True, default_value=44,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_SINT32_EXTENSION_FIELD_NUMBER = 65
+default_sint32_extension = _descriptor.FieldDescriptor(
+  name='default_sint32_extension', full_name='protobuf_unittest.default_sint32_extension', index=55,
+  number=65, type=17, cpp_type=1, label=1,
+  has_default_value=True, default_value=-45,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_SINT64_EXTENSION_FIELD_NUMBER = 66
+default_sint64_extension = _descriptor.FieldDescriptor(
+  name='default_sint64_extension', full_name='protobuf_unittest.default_sint64_extension', index=56,
+  number=66, type=18, cpp_type=2, label=1,
+  has_default_value=True, default_value=46,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_FIXED32_EXTENSION_FIELD_NUMBER = 67
+default_fixed32_extension = _descriptor.FieldDescriptor(
+  name='default_fixed32_extension', full_name='protobuf_unittest.default_fixed32_extension', index=57,
+  number=67, type=7, cpp_type=3, label=1,
+  has_default_value=True, default_value=47,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_FIXED64_EXTENSION_FIELD_NUMBER = 68
+default_fixed64_extension = _descriptor.FieldDescriptor(
+  name='default_fixed64_extension', full_name='protobuf_unittest.default_fixed64_extension', index=58,
+  number=68, type=6, cpp_type=4, label=1,
+  has_default_value=True, default_value=48,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_SFIXED32_EXTENSION_FIELD_NUMBER = 69
+default_sfixed32_extension = _descriptor.FieldDescriptor(
+  name='default_sfixed32_extension', full_name='protobuf_unittest.default_sfixed32_extension', index=59,
+  number=69, type=15, cpp_type=1, label=1,
+  has_default_value=True, default_value=49,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_SFIXED64_EXTENSION_FIELD_NUMBER = 70
+default_sfixed64_extension = _descriptor.FieldDescriptor(
+  name='default_sfixed64_extension', full_name='protobuf_unittest.default_sfixed64_extension', index=60,
+  number=70, type=16, cpp_type=2, label=1,
+  has_default_value=True, default_value=-50,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_FLOAT_EXTENSION_FIELD_NUMBER = 71
+default_float_extension = _descriptor.FieldDescriptor(
+  name='default_float_extension', full_name='protobuf_unittest.default_float_extension', index=61,
+  number=71, type=2, cpp_type=6, label=1,
+  has_default_value=True, default_value=float(51.5),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_DOUBLE_EXTENSION_FIELD_NUMBER = 72
+default_double_extension = _descriptor.FieldDescriptor(
+  name='default_double_extension', full_name='protobuf_unittest.default_double_extension', index=62,
+  number=72, type=1, cpp_type=5, label=1,
+  has_default_value=True, default_value=float(52000),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_BOOL_EXTENSION_FIELD_NUMBER = 73
+default_bool_extension = _descriptor.FieldDescriptor(
+  name='default_bool_extension', full_name='protobuf_unittest.default_bool_extension', index=63,
+  number=73, type=8, cpp_type=7, label=1,
+  has_default_value=True, default_value=True,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_STRING_EXTENSION_FIELD_NUMBER = 74
+default_string_extension = _descriptor.FieldDescriptor(
+  name='default_string_extension', full_name='protobuf_unittest.default_string_extension', index=64,
+  number=74, type=9, cpp_type=9, label=1,
+  has_default_value=True, default_value=b"hello".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_BYTES_EXTENSION_FIELD_NUMBER = 75
+default_bytes_extension = _descriptor.FieldDescriptor(
+  name='default_bytes_extension', full_name='protobuf_unittest.default_bytes_extension', index=65,
+  number=75, type=12, cpp_type=9, label=1,
+  has_default_value=True, default_value=b"world",
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_NESTED_ENUM_EXTENSION_FIELD_NUMBER = 81
+default_nested_enum_extension = _descriptor.FieldDescriptor(
+  name='default_nested_enum_extension', full_name='protobuf_unittest.default_nested_enum_extension', index=66,
+  number=81, type=14, cpp_type=8, label=1,
+  has_default_value=True, default_value=2,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_FOREIGN_ENUM_EXTENSION_FIELD_NUMBER = 82
+default_foreign_enum_extension = _descriptor.FieldDescriptor(
+  name='default_foreign_enum_extension', full_name='protobuf_unittest.default_foreign_enum_extension', index=67,
+  number=82, type=14, cpp_type=8, label=1,
+  has_default_value=True, default_value=5,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_IMPORT_ENUM_EXTENSION_FIELD_NUMBER = 83
+default_import_enum_extension = _descriptor.FieldDescriptor(
+  name='default_import_enum_extension', full_name='protobuf_unittest.default_import_enum_extension', index=68,
+  number=83, type=14, cpp_type=8, label=1,
+  has_default_value=True, default_value=8,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_STRING_PIECE_EXTENSION_FIELD_NUMBER = 84
+default_string_piece_extension = _descriptor.FieldDescriptor(
+  name='default_string_piece_extension', full_name='protobuf_unittest.default_string_piece_extension', index=69,
+  number=84, type=9, cpp_type=9, label=1,
+  has_default_value=True, default_value=b"abc".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+DEFAULT_CORD_EXTENSION_FIELD_NUMBER = 85
+default_cord_extension = _descriptor.FieldDescriptor(
+  name='default_cord_extension', full_name='protobuf_unittest.default_cord_extension', index=70,
+  number=85, type=9, cpp_type=9, label=1,
+  has_default_value=True, default_value=b"123".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+ONEOF_UINT32_EXTENSION_FIELD_NUMBER = 111
+oneof_uint32_extension = _descriptor.FieldDescriptor(
+  name='oneof_uint32_extension', full_name='protobuf_unittest.oneof_uint32_extension', index=71,
+  number=111, type=13, cpp_type=3, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+ONEOF_NESTED_MESSAGE_EXTENSION_FIELD_NUMBER = 112
+oneof_nested_message_extension = _descriptor.FieldDescriptor(
+  name='oneof_nested_message_extension', full_name='protobuf_unittest.oneof_nested_message_extension', index=72,
+  number=112, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+ONEOF_STRING_EXTENSION_FIELD_NUMBER = 113
+oneof_string_extension = _descriptor.FieldDescriptor(
+  name='oneof_string_extension', full_name='protobuf_unittest.oneof_string_extension', index=73,
+  number=113, type=9, cpp_type=9, label=1,
+  has_default_value=False, default_value=b"".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+ONEOF_BYTES_EXTENSION_FIELD_NUMBER = 114
+oneof_bytes_extension = _descriptor.FieldDescriptor(
+  name='oneof_bytes_extension', full_name='protobuf_unittest.oneof_bytes_extension', index=74,
+  number=114, type=12, cpp_type=9, label=1,
+  has_default_value=False, default_value=b"",
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+MY_EXTENSION_STRING_FIELD_NUMBER = 50
+my_extension_string = _descriptor.FieldDescriptor(
+  name='my_extension_string', full_name='protobuf_unittest.my_extension_string', index=75,
+  number=50, type=9, cpp_type=9, label=1,
+  has_default_value=False, default_value=b"".decode('utf-8'),
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+MY_EXTENSION_INT_FIELD_NUMBER = 5
+my_extension_int = _descriptor.FieldDescriptor(
+  name='my_extension_int', full_name='protobuf_unittest.my_extension_int', index=76,
+  number=5, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_INT32_EXTENSION_FIELD_NUMBER = 90
+packed_int32_extension = _descriptor.FieldDescriptor(
+  name='packed_int32_extension', full_name='protobuf_unittest.packed_int32_extension', index=77,
+  number=90, type=5, cpp_type=1, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_INT64_EXTENSION_FIELD_NUMBER = 91
+packed_int64_extension = _descriptor.FieldDescriptor(
+  name='packed_int64_extension', full_name='protobuf_unittest.packed_int64_extension', index=78,
+  number=91, type=3, cpp_type=2, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_UINT32_EXTENSION_FIELD_NUMBER = 92
+packed_uint32_extension = _descriptor.FieldDescriptor(
+  name='packed_uint32_extension', full_name='protobuf_unittest.packed_uint32_extension', index=79,
+  number=92, type=13, cpp_type=3, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_UINT64_EXTENSION_FIELD_NUMBER = 93
+packed_uint64_extension = _descriptor.FieldDescriptor(
+  name='packed_uint64_extension', full_name='protobuf_unittest.packed_uint64_extension', index=80,
+  number=93, type=4, cpp_type=4, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_SINT32_EXTENSION_FIELD_NUMBER = 94
+packed_sint32_extension = _descriptor.FieldDescriptor(
+  name='packed_sint32_extension', full_name='protobuf_unittest.packed_sint32_extension', index=81,
+  number=94, type=17, cpp_type=1, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_SINT64_EXTENSION_FIELD_NUMBER = 95
+packed_sint64_extension = _descriptor.FieldDescriptor(
+  name='packed_sint64_extension', full_name='protobuf_unittest.packed_sint64_extension', index=82,
+  number=95, type=18, cpp_type=2, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_FIXED32_EXTENSION_FIELD_NUMBER = 96
+packed_fixed32_extension = _descriptor.FieldDescriptor(
+  name='packed_fixed32_extension', full_name='protobuf_unittest.packed_fixed32_extension', index=83,
+  number=96, type=7, cpp_type=3, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_FIXED64_EXTENSION_FIELD_NUMBER = 97
+packed_fixed64_extension = _descriptor.FieldDescriptor(
+  name='packed_fixed64_extension', full_name='protobuf_unittest.packed_fixed64_extension', index=84,
+  number=97, type=6, cpp_type=4, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_SFIXED32_EXTENSION_FIELD_NUMBER = 98
+packed_sfixed32_extension = _descriptor.FieldDescriptor(
+  name='packed_sfixed32_extension', full_name='protobuf_unittest.packed_sfixed32_extension', index=85,
+  number=98, type=15, cpp_type=1, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_SFIXED64_EXTENSION_FIELD_NUMBER = 99
+packed_sfixed64_extension = _descriptor.FieldDescriptor(
+  name='packed_sfixed64_extension', full_name='protobuf_unittest.packed_sfixed64_extension', index=86,
+  number=99, type=16, cpp_type=2, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_FLOAT_EXTENSION_FIELD_NUMBER = 100
+packed_float_extension = _descriptor.FieldDescriptor(
+  name='packed_float_extension', full_name='protobuf_unittest.packed_float_extension', index=87,
+  number=100, type=2, cpp_type=6, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_DOUBLE_EXTENSION_FIELD_NUMBER = 101
+packed_double_extension = _descriptor.FieldDescriptor(
+  name='packed_double_extension', full_name='protobuf_unittest.packed_double_extension', index=88,
+  number=101, type=1, cpp_type=5, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_BOOL_EXTENSION_FIELD_NUMBER = 102
+packed_bool_extension = _descriptor.FieldDescriptor(
+  name='packed_bool_extension', full_name='protobuf_unittest.packed_bool_extension', index=89,
+  number=102, type=8, cpp_type=7, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+PACKED_ENUM_EXTENSION_FIELD_NUMBER = 103
+packed_enum_extension = _descriptor.FieldDescriptor(
+  name='packed_enum_extension', full_name='protobuf_unittest.packed_enum_extension', index=90,
+  number=103, type=14, cpp_type=8, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_INT32_EXTENSION_FIELD_NUMBER = 90
+unpacked_int32_extension = _descriptor.FieldDescriptor(
+  name='unpacked_int32_extension', full_name='protobuf_unittest.unpacked_int32_extension', index=91,
+  number=90, type=5, cpp_type=1, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_INT64_EXTENSION_FIELD_NUMBER = 91
+unpacked_int64_extension = _descriptor.FieldDescriptor(
+  name='unpacked_int64_extension', full_name='protobuf_unittest.unpacked_int64_extension', index=92,
+  number=91, type=3, cpp_type=2, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_UINT32_EXTENSION_FIELD_NUMBER = 92
+unpacked_uint32_extension = _descriptor.FieldDescriptor(
+  name='unpacked_uint32_extension', full_name='protobuf_unittest.unpacked_uint32_extension', index=93,
+  number=92, type=13, cpp_type=3, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_UINT64_EXTENSION_FIELD_NUMBER = 93
+unpacked_uint64_extension = _descriptor.FieldDescriptor(
+  name='unpacked_uint64_extension', full_name='protobuf_unittest.unpacked_uint64_extension', index=94,
+  number=93, type=4, cpp_type=4, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_SINT32_EXTENSION_FIELD_NUMBER = 94
+unpacked_sint32_extension = _descriptor.FieldDescriptor(
+  name='unpacked_sint32_extension', full_name='protobuf_unittest.unpacked_sint32_extension', index=95,
+  number=94, type=17, cpp_type=1, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_SINT64_EXTENSION_FIELD_NUMBER = 95
+unpacked_sint64_extension = _descriptor.FieldDescriptor(
+  name='unpacked_sint64_extension', full_name='protobuf_unittest.unpacked_sint64_extension', index=96,
+  number=95, type=18, cpp_type=2, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_FIXED32_EXTENSION_FIELD_NUMBER = 96
+unpacked_fixed32_extension = _descriptor.FieldDescriptor(
+  name='unpacked_fixed32_extension', full_name='protobuf_unittest.unpacked_fixed32_extension', index=97,
+  number=96, type=7, cpp_type=3, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_FIXED64_EXTENSION_FIELD_NUMBER = 97
+unpacked_fixed64_extension = _descriptor.FieldDescriptor(
+  name='unpacked_fixed64_extension', full_name='protobuf_unittest.unpacked_fixed64_extension', index=98,
+  number=97, type=6, cpp_type=4, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_SFIXED32_EXTENSION_FIELD_NUMBER = 98
+unpacked_sfixed32_extension = _descriptor.FieldDescriptor(
+  name='unpacked_sfixed32_extension', full_name='protobuf_unittest.unpacked_sfixed32_extension', index=99,
+  number=98, type=15, cpp_type=1, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_SFIXED64_EXTENSION_FIELD_NUMBER = 99
+unpacked_sfixed64_extension = _descriptor.FieldDescriptor(
+  name='unpacked_sfixed64_extension', full_name='protobuf_unittest.unpacked_sfixed64_extension', index=100,
+  number=99, type=16, cpp_type=2, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_FLOAT_EXTENSION_FIELD_NUMBER = 100
+unpacked_float_extension = _descriptor.FieldDescriptor(
+  name='unpacked_float_extension', full_name='protobuf_unittest.unpacked_float_extension', index=101,
+  number=100, type=2, cpp_type=6, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_DOUBLE_EXTENSION_FIELD_NUMBER = 101
+unpacked_double_extension = _descriptor.FieldDescriptor(
+  name='unpacked_double_extension', full_name='protobuf_unittest.unpacked_double_extension', index=102,
+  number=101, type=1, cpp_type=5, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_BOOL_EXTENSION_FIELD_NUMBER = 102
+unpacked_bool_extension = _descriptor.FieldDescriptor(
+  name='unpacked_bool_extension', full_name='protobuf_unittest.unpacked_bool_extension', index=103,
+  number=102, type=8, cpp_type=7, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+UNPACKED_ENUM_EXTENSION_FIELD_NUMBER = 103
+unpacked_enum_extension = _descriptor.FieldDescriptor(
+  name='unpacked_enum_extension', full_name='protobuf_unittest.unpacked_enum_extension', index=104,
+  number=103, type=14, cpp_type=8, label=3,
+  has_default_value=False, default_value=[],
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+TEST_ALL_TYPES_FIELD_NUMBER = 536860000
+test_all_types = _descriptor.FieldDescriptor(
+  name='test_all_types', full_name='protobuf_unittest.test_all_types', index=105,
+  number=536860000, type=11, cpp_type=10, label=1,
+  has_default_value=False, default_value=None,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+TEST_EXTENSION_INSIDE_TABLE_EXTENSION_FIELD_NUMBER = 5
+test_extension_inside_table_extension = _descriptor.FieldDescriptor(
+  name='test_extension_inside_table_extension', full_name='protobuf_unittest.test_extension_inside_table_extension', index=106,
+  number=5, type=5, cpp_type=1, label=1,
+  has_default_value=False, default_value=0,
+  message_type=None, enum_type=None, containing_type=None,
+  is_extension=True, extension_scope=None,
+  serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key)
+
+_TESTALLTYPES_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='protobuf_unittest.TestAllTypes.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOO', index=0, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR', index=1, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAZ', index=2, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='NEG', index=3, number=-1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=3202,
+  serialized_end=3259,
+)
+_sym_db.RegisterEnumDescriptor(_TESTALLTYPES_NESTEDENUM)
+
+_TESTONEOF2_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='protobuf_unittest.TestOneof2.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOO', index=0, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR', index=1, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAZ', index=2, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=3202,
+  serialized_end=3241,
+)
+_sym_db.RegisterEnumDescriptor(_TESTONEOF2_NESTEDENUM)
+
+_TESTDYNAMICEXTENSIONS_DYNAMICENUMTYPE = _descriptor.EnumDescriptor(
+  name='DynamicEnumType',
+  full_name='protobuf_unittest.TestDynamicExtensions.DynamicEnumType',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='DYNAMIC_FOO', index=0, number=2200,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='DYNAMIC_BAR', index=1, number=2201,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='DYNAMIC_BAZ', index=2, number=2202,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=12590,
+  serialized_end=12661,
+)
+_sym_db.RegisterEnumDescriptor(_TESTDYNAMICEXTENSIONS_DYNAMICENUMTYPE)
+
+
+_TESTALLTYPES_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='protobuf_unittest.TestAllTypes.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bb', full_name='protobuf_unittest.TestAllTypes.NestedMessage.bb', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3117,
+  serialized_end=3144,
+)
+
+_TESTALLTYPES_OPTIONALGROUP = _descriptor.Descriptor(
+  name='OptionalGroup',
+  full_name='protobuf_unittest.TestAllTypes.OptionalGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestAllTypes.OptionalGroup.a', index=0,
+      number=17, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3146,
+  serialized_end=3172,
+)
+
+_TESTALLTYPES_REPEATEDGROUP = _descriptor.Descriptor(
+  name='RepeatedGroup',
+  full_name='protobuf_unittest.TestAllTypes.RepeatedGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestAllTypes.RepeatedGroup.a', index=0,
+      number=47, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3174,
+  serialized_end=3200,
+)
+
+_TESTALLTYPES = _descriptor.Descriptor(
+  name='TestAllTypes',
+  full_name='protobuf_unittest.TestAllTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='protobuf_unittest.TestAllTypes.optional_int32', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_int64', full_name='protobuf_unittest.TestAllTypes.optional_int64', index=1,
+      number=2, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint32', full_name='protobuf_unittest.TestAllTypes.optional_uint32', index=2,
+      number=3, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint64', full_name='protobuf_unittest.TestAllTypes.optional_uint64', index=3,
+      number=4, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sint32', full_name='protobuf_unittest.TestAllTypes.optional_sint32', index=4,
+      number=5, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sint64', full_name='protobuf_unittest.TestAllTypes.optional_sint64', index=5,
+      number=6, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_fixed32', full_name='protobuf_unittest.TestAllTypes.optional_fixed32', index=6,
+      number=7, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_fixed64', full_name='protobuf_unittest.TestAllTypes.optional_fixed64', index=7,
+      number=8, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sfixed32', full_name='protobuf_unittest.TestAllTypes.optional_sfixed32', index=8,
+      number=9, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sfixed64', full_name='protobuf_unittest.TestAllTypes.optional_sfixed64', index=9,
+      number=10, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_float', full_name='protobuf_unittest.TestAllTypes.optional_float', index=10,
+      number=11, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_double', full_name='protobuf_unittest.TestAllTypes.optional_double', index=11,
+      number=12, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bool', full_name='protobuf_unittest.TestAllTypes.optional_bool', index=12,
+      number=13, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string', full_name='protobuf_unittest.TestAllTypes.optional_string', index=13,
+      number=14, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bytes', full_name='protobuf_unittest.TestAllTypes.optional_bytes', index=14,
+      number=15, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optionalgroup', full_name='protobuf_unittest.TestAllTypes.optionalgroup', index=15,
+      number=16, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_message', full_name='protobuf_unittest.TestAllTypes.optional_nested_message', index=16,
+      number=18, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_foreign_message', full_name='protobuf_unittest.TestAllTypes.optional_foreign_message', index=17,
+      number=19, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_import_message', full_name='protobuf_unittest.TestAllTypes.optional_import_message', index=18,
+      number=20, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_enum', full_name='protobuf_unittest.TestAllTypes.optional_nested_enum', index=19,
+      number=21, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_foreign_enum', full_name='protobuf_unittest.TestAllTypes.optional_foreign_enum', index=20,
+      number=22, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=4,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_import_enum', full_name='protobuf_unittest.TestAllTypes.optional_import_enum', index=21,
+      number=23, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=7,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string_piece', full_name='protobuf_unittest.TestAllTypes.optional_string_piece', index=22,
+      number=24, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_cord', full_name='protobuf_unittest.TestAllTypes.optional_cord', index=23,
+      number=25, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_public_import_message', full_name='protobuf_unittest.TestAllTypes.optional_public_import_message', index=24,
+      number=26, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_lazy_message', full_name='protobuf_unittest.TestAllTypes.optional_lazy_message', index=25,
+      number=27, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'(\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int32', full_name='protobuf_unittest.TestAllTypes.repeated_int32', index=26,
+      number=31, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64', full_name='protobuf_unittest.TestAllTypes.repeated_int64', index=27,
+      number=32, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint32', full_name='protobuf_unittest.TestAllTypes.repeated_uint32', index=28,
+      number=33, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=34, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint32', full_name='protobuf_unittest.TestAllTypes.repeated_sint32', index=30,
+      number=35, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint64', full_name='protobuf_unittest.TestAllTypes.repeated_sint64', index=31,
+      number=36, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
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+      number=37, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed64', full_name='protobuf_unittest.TestAllTypes.repeated_fixed64', index=33,
+      number=38, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed32', full_name='protobuf_unittest.TestAllTypes.repeated_sfixed32', index=34,
+      number=39, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed64', full_name='protobuf_unittest.TestAllTypes.repeated_sfixed64', index=35,
+      number=40, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float', full_name='protobuf_unittest.TestAllTypes.repeated_float', index=36,
+      number=41, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_double', full_name='protobuf_unittest.TestAllTypes.repeated_double', index=37,
+      number=42, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bool', full_name='protobuf_unittest.TestAllTypes.repeated_bool', index=38,
+      number=43, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string', full_name='protobuf_unittest.TestAllTypes.repeated_string', index=39,
+      number=44, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bytes', full_name='protobuf_unittest.TestAllTypes.repeated_bytes', index=40,
+      number=45, type=12, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeatedgroup', full_name='protobuf_unittest.TestAllTypes.repeatedgroup', index=41,
+      number=46, type=10, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_message', full_name='protobuf_unittest.TestAllTypes.repeated_nested_message', index=42,
+      number=48, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_foreign_message', full_name='protobuf_unittest.TestAllTypes.repeated_foreign_message', index=43,
+      number=49, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_import_message', full_name='protobuf_unittest.TestAllTypes.repeated_import_message', index=44,
+      number=50, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_enum', full_name='protobuf_unittest.TestAllTypes.repeated_nested_enum', index=45,
+      number=51, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_foreign_enum', full_name='protobuf_unittest.TestAllTypes.repeated_foreign_enum', index=46,
+      number=52, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_import_enum', full_name='protobuf_unittest.TestAllTypes.repeated_import_enum', index=47,
+      number=53, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string_piece', full_name='protobuf_unittest.TestAllTypes.repeated_string_piece', index=48,
+      number=54, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_cord', full_name='protobuf_unittest.TestAllTypes.repeated_cord', index=49,
+      number=55, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_lazy_message', full_name='protobuf_unittest.TestAllTypes.repeated_lazy_message', index=50,
+      number=57, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'(\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_int32', full_name='protobuf_unittest.TestAllTypes.default_int32', index=51,
+      number=61, type=5, cpp_type=1, label=1,
+      has_default_value=True, default_value=41,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_int64', full_name='protobuf_unittest.TestAllTypes.default_int64', index=52,
+      number=62, type=3, cpp_type=2, label=1,
+      has_default_value=True, default_value=42,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_uint32', full_name='protobuf_unittest.TestAllTypes.default_uint32', index=53,
+      number=63, type=13, cpp_type=3, label=1,
+      has_default_value=True, default_value=43,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_uint64', full_name='protobuf_unittest.TestAllTypes.default_uint64', index=54,
+      number=64, type=4, cpp_type=4, label=1,
+      has_default_value=True, default_value=44,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_sint32', full_name='protobuf_unittest.TestAllTypes.default_sint32', index=55,
+      number=65, type=17, cpp_type=1, label=1,
+      has_default_value=True, default_value=-45,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_sint64', full_name='protobuf_unittest.TestAllTypes.default_sint64', index=56,
+      number=66, type=18, cpp_type=2, label=1,
+      has_default_value=True, default_value=46,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_fixed32', full_name='protobuf_unittest.TestAllTypes.default_fixed32', index=57,
+      number=67, type=7, cpp_type=3, label=1,
+      has_default_value=True, default_value=47,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_fixed64', full_name='protobuf_unittest.TestAllTypes.default_fixed64', index=58,
+      number=68, type=6, cpp_type=4, label=1,
+      has_default_value=True, default_value=48,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_sfixed32', full_name='protobuf_unittest.TestAllTypes.default_sfixed32', index=59,
+      number=69, type=15, cpp_type=1, label=1,
+      has_default_value=True, default_value=49,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_sfixed64', full_name='protobuf_unittest.TestAllTypes.default_sfixed64', index=60,
+      number=70, type=16, cpp_type=2, label=1,
+      has_default_value=True, default_value=-50,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_float', full_name='protobuf_unittest.TestAllTypes.default_float', index=61,
+      number=71, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=float(51.5),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_double', full_name='protobuf_unittest.TestAllTypes.default_double', index=62,
+      number=72, type=1, cpp_type=5, label=1,
+      has_default_value=True, default_value=float(52000),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_bool', full_name='protobuf_unittest.TestAllTypes.default_bool', index=63,
+      number=73, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=True,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_string', full_name='protobuf_unittest.TestAllTypes.default_string', index=64,
+      number=74, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"hello".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_bytes', full_name='protobuf_unittest.TestAllTypes.default_bytes', index=65,
+      number=75, type=12, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"world",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_nested_enum', full_name='protobuf_unittest.TestAllTypes.default_nested_enum', index=66,
+      number=81, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=2,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_foreign_enum', full_name='protobuf_unittest.TestAllTypes.default_foreign_enum', index=67,
+      number=82, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=5,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_import_enum', full_name='protobuf_unittest.TestAllTypes.default_import_enum', index=68,
+      number=83, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=8,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_string_piece', full_name='protobuf_unittest.TestAllTypes.default_string_piece', index=69,
+      number=84, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"abc".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='default_cord', full_name='protobuf_unittest.TestAllTypes.default_cord', index=70,
+      number=85, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"123".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_uint32', full_name='protobuf_unittest.TestAllTypes.oneof_uint32', index=71,
+      number=111, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_nested_message', full_name='protobuf_unittest.TestAllTypes.oneof_nested_message', index=72,
+      number=112, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_string', full_name='protobuf_unittest.TestAllTypes.oneof_string', index=73,
+      number=113, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_bytes', full_name='protobuf_unittest.TestAllTypes.oneof_bytes', index=74,
+      number=114, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTALLTYPES_NESTEDMESSAGE, _TESTALLTYPES_OPTIONALGROUP, _TESTALLTYPES_REPEATEDGROUP, ],
+  enum_types=[
+    _TESTALLTYPES_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
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+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=93,
+  serialized_end=3274,
+)
+
+
+_NESTEDTESTALLTYPES = _descriptor.Descriptor(
+  name='NestedTestAllTypes',
+  full_name='protobuf_unittest.NestedTestAllTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
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+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='payload', full_name='protobuf_unittest.NestedTestAllTypes.payload', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_child', full_name='protobuf_unittest.NestedTestAllTypes.repeated_child', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3277,
+  serialized_end=3464,
+)
+
+
+_TESTDEPRECATEDFIELDS = _descriptor.Descriptor(
+  name='TestDeprecatedFields',
+  full_name='protobuf_unittest.TestDeprecatedFields',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='deprecated_int32', full_name='protobuf_unittest.TestDeprecatedFields.deprecated_int32', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\030\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='deprecated_int32_in_oneof', full_name='protobuf_unittest.TestDeprecatedFields.deprecated_int32_in_oneof', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\030\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='oneof_fields', full_name='protobuf_unittest.TestDeprecatedFields.oneof_fields',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=3466,
+  serialized_end=3575,
+)
+
+
+_TESTDEPRECATEDMESSAGE = _descriptor.Descriptor(
+  name='TestDeprecatedMessage',
+  full_name='protobuf_unittest.TestDeprecatedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'\030\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3577,
+  serialized_end=3604,
+)
+
+
+_FOREIGNMESSAGE = _descriptor.Descriptor(
+  name='ForeignMessage',
+  full_name='protobuf_unittest.ForeignMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='c', full_name='protobuf_unittest.ForeignMessage.c', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='d', full_name='protobuf_unittest.ForeignMessage.d', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3606,
+  serialized_end=3644,
+)
+
+
+_TESTRESERVEDFIELDS = _descriptor.Descriptor(
+  name='TestReservedFields',
+  full_name='protobuf_unittest.TestReservedFields',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3646,
+  serialized_end=3694,
+)
+
+
+_TESTALLEXTENSIONS = _descriptor.Descriptor(
+  name='TestAllExtensions',
+  full_name='protobuf_unittest.TestAllExtensions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=3696,
+  serialized_end=3725,
+)
+
+
+_OPTIONALGROUP_EXTENSION = _descriptor.Descriptor(
+  name='OptionalGroup_extension',
+  full_name='protobuf_unittest.OptionalGroup_extension',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.OptionalGroup_extension.a', index=0,
+      number=17, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3727,
+  serialized_end=3763,
+)
+
+
+_REPEATEDGROUP_EXTENSION = _descriptor.Descriptor(
+  name='RepeatedGroup_extension',
+  full_name='protobuf_unittest.RepeatedGroup_extension',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.RepeatedGroup_extension.a', index=0,
+      number=47, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3765,
+  serialized_end=3801,
+)
+
+
+_TESTGROUP_OPTIONALGROUP = _descriptor.Descriptor(
+  name='OptionalGroup',
+  full_name='protobuf_unittest.TestGroup.OptionalGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestGroup.OptionalGroup.a', index=0,
+      number=17, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3146,
+  serialized_end=3172,
+)
+
+_TESTGROUP = _descriptor.Descriptor(
+  name='TestGroup',
+  full_name='protobuf_unittest.TestGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optionalgroup', full_name='protobuf_unittest.TestGroup.optionalgroup', index=0,
+      number=16, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_foreign_enum', full_name='protobuf_unittest.TestGroup.optional_foreign_enum', index=1,
+      number=22, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=4,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTGROUP_OPTIONALGROUP, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3804,
+  serialized_end=3973,
+)
+
+
+_TESTGROUPEXTENSION = _descriptor.Descriptor(
+  name='TestGroupExtension',
+  full_name='protobuf_unittest.TestGroupExtension',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=3975,
+  serialized_end=4005,
+)
+
+
+_TESTNESTEDEXTENSION_OPTIONALGROUP_EXTENSION = _descriptor.Descriptor(
+  name='OptionalGroup_extension',
+  full_name='protobuf_unittest.TestNestedExtension.OptionalGroup_extension',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestNestedExtension.OptionalGroup_extension.a', index=0,
+      number=17, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3727,
+  serialized_end=3763,
+)
+
+_TESTNESTEDEXTENSION = _descriptor.Descriptor(
+  name='TestNestedExtension',
+  full_name='protobuf_unittest.TestNestedExtension',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='test', full_name='protobuf_unittest.TestNestedExtension.test', index=0,
+      number=1002, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"test".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nested_string_extension', full_name='protobuf_unittest.TestNestedExtension.nested_string_extension', index=1,
+      number=1003, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optionalgroup_extension', full_name='protobuf_unittest.TestNestedExtension.optionalgroup_extension', index=2,
+      number=16, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_foreign_enum_extension', full_name='protobuf_unittest.TestNestedExtension.optional_foreign_enum_extension', index=3,
+      number=22, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=4,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[_TESTNESTEDEXTENSION_OPTIONALGROUP_EXTENSION, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=4008,
+  serialized_end=4447,
+)
+
+
+_TESTREQUIRED = _descriptor.Descriptor(
+  name='TestRequired',
+  full_name='protobuf_unittest.TestRequired',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestRequired.a', index=0,
+      number=1, type=5, cpp_type=1, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy2', full_name='protobuf_unittest.TestRequired.dummy2', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='b', full_name='protobuf_unittest.TestRequired.b', index=2,
+      number=3, type=5, cpp_type=1, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy4', full_name='protobuf_unittest.TestRequired.dummy4', index=3,
+      number=4, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy5', full_name='protobuf_unittest.TestRequired.dummy5', index=4,
+      number=5, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy6', full_name='protobuf_unittest.TestRequired.dummy6', index=5,
+      number=6, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy7', full_name='protobuf_unittest.TestRequired.dummy7', index=6,
+      number=7, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy8', full_name='protobuf_unittest.TestRequired.dummy8', index=7,
+      number=8, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy9', full_name='protobuf_unittest.TestRequired.dummy9', index=8,
+      number=9, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy10', full_name='protobuf_unittest.TestRequired.dummy10', index=9,
+      number=10, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy11', full_name='protobuf_unittest.TestRequired.dummy11', index=10,
+      number=11, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy12', full_name='protobuf_unittest.TestRequired.dummy12', index=11,
+      number=12, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy13', full_name='protobuf_unittest.TestRequired.dummy13', index=12,
+      number=13, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy14', full_name='protobuf_unittest.TestRequired.dummy14', index=13,
+      number=14, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy15', full_name='protobuf_unittest.TestRequired.dummy15', index=14,
+      number=15, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy16', full_name='protobuf_unittest.TestRequired.dummy16', index=15,
+      number=16, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy17', full_name='protobuf_unittest.TestRequired.dummy17', index=16,
+      number=17, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy18', full_name='protobuf_unittest.TestRequired.dummy18', index=17,
+      number=18, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy19', full_name='protobuf_unittest.TestRequired.dummy19', index=18,
+      number=19, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy20', full_name='protobuf_unittest.TestRequired.dummy20', index=19,
+      number=20, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy21', full_name='protobuf_unittest.TestRequired.dummy21', index=20,
+      number=21, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy22', full_name='protobuf_unittest.TestRequired.dummy22', index=21,
+      number=22, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy23', full_name='protobuf_unittest.TestRequired.dummy23', index=22,
+      number=23, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy24', full_name='protobuf_unittest.TestRequired.dummy24', index=23,
+      number=24, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy25', full_name='protobuf_unittest.TestRequired.dummy25', index=24,
+      number=25, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy26', full_name='protobuf_unittest.TestRequired.dummy26', index=25,
+      number=26, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy27', full_name='protobuf_unittest.TestRequired.dummy27', index=26,
+      number=27, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy28', full_name='protobuf_unittest.TestRequired.dummy28', index=27,
+      number=28, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy29', full_name='protobuf_unittest.TestRequired.dummy29', index=28,
+      number=29, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy30', full_name='protobuf_unittest.TestRequired.dummy30', index=29,
+      number=30, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy31', full_name='protobuf_unittest.TestRequired.dummy31', index=30,
+      number=31, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy32', full_name='protobuf_unittest.TestRequired.dummy32', index=31,
+      number=32, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='c', full_name='protobuf_unittest.TestRequired.c', index=32,
+      number=33, type=5, cpp_type=1, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='single', full_name='protobuf_unittest.TestRequired.single', index=0,
+      number=1000, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='multi', full_name='protobuf_unittest.TestRequired.multi', index=1,
+      number=1001, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=4450,
+  serialized_end=5175,
+)
+
+
+_TESTREQUIREDFOREIGN = _descriptor.Descriptor(
+  name='TestRequiredForeign',
+  full_name='protobuf_unittest.TestRequiredForeign',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_message', full_name='protobuf_unittest.TestRequiredForeign.optional_message', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_message', full_name='protobuf_unittest.TestRequiredForeign.repeated_message', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dummy', full_name='protobuf_unittest.TestRequiredForeign.dummy', index=2,
+      number=3, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5178,
+  serialized_end=5332,
+)
+
+
+_TESTREQUIREDMESSAGE = _descriptor.Descriptor(
+  name='TestRequiredMessage',
+  full_name='protobuf_unittest.TestRequiredMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_message', full_name='protobuf_unittest.TestRequiredMessage.optional_message', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_message', full_name='protobuf_unittest.TestRequiredMessage.repeated_message', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='required_message', full_name='protobuf_unittest.TestRequiredMessage.required_message', index=2,
+      number=3, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5335,
+  serialized_end=5533,
+)
+
+
+_TESTFOREIGNNESTED = _descriptor.Descriptor(
+  name='TestForeignNested',
+  full_name='protobuf_unittest.TestForeignNested',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='foreign_nested', full_name='protobuf_unittest.TestForeignNested.foreign_nested', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5535,
+  serialized_end=5625,
+)
+
+
+_TESTEMPTYMESSAGE = _descriptor.Descriptor(
+  name='TestEmptyMessage',
+  full_name='protobuf_unittest.TestEmptyMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5627,
+  serialized_end=5645,
+)
+
+
+_TESTEMPTYMESSAGEWITHEXTENSIONS = _descriptor.Descriptor(
+  name='TestEmptyMessageWithExtensions',
+  full_name='protobuf_unittest.TestEmptyMessageWithExtensions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=5647,
+  serialized_end=5689,
+)
+
+
+_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE_NESTEDNESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedNestedMessage',
+  full_name='protobuf_unittest.TestPickleNestedMessage.NestedMessage.NestedNestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='cc', full_name='protobuf_unittest.TestPickleNestedMessage.NestedMessage.NestedNestedMessage.cc', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5747,
+  serialized_end=5780,
+)
+
+_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='protobuf_unittest.TestPickleNestedMessage.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bb', full_name='protobuf_unittest.TestPickleNestedMessage.NestedMessage.bb', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE_NESTEDNESTEDMESSAGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5718,
+  serialized_end=5780,
+)
+
+_TESTPICKLENESTEDMESSAGE = _descriptor.Descriptor(
+  name='TestPickleNestedMessage',
+  full_name='protobuf_unittest.TestPickleNestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5691,
+  serialized_end=5780,
+)
+
+
+_TESTMULTIPLEEXTENSIONRANGES = _descriptor.Descriptor(
+  name='TestMultipleExtensionRanges',
+  full_name='protobuf_unittest.TestMultipleExtensionRanges',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(42, 43), (4143, 4244), (65536, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=5782,
+  serialized_end=5837,
+)
+
+
+_TESTREALLYLARGETAGNUMBER = _descriptor.Descriptor(
+  name='TestReallyLargeTagNumber',
+  full_name='protobuf_unittest.TestReallyLargeTagNumber',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestReallyLargeTagNumber.a', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bb', full_name='protobuf_unittest.TestReallyLargeTagNumber.bb', index=1,
+      number=268435455, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5839,
+  serialized_end=5891,
+)
+
+
+_TESTRECURSIVEMESSAGE = _descriptor.Descriptor(
+  name='TestRecursiveMessage',
+  full_name='protobuf_unittest.TestRecursiveMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestRecursiveMessage.a', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='i', full_name='protobuf_unittest.TestRecursiveMessage.i', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5893,
+  serialized_end=5978,
+)
+
+
+_TESTMUTUALRECURSIONA_SUBMESSAGE = _descriptor.Descriptor(
+  name='SubMessage',
+  full_name='protobuf_unittest.TestMutualRecursionA.SubMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='b', full_name='protobuf_unittest.TestMutualRecursionA.SubMessage.b', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6126,
+  serialized_end=6190,
+)
+
+_TESTMUTUALRECURSIONA_SUBGROUP = _descriptor.Descriptor(
+  name='SubGroup',
+  full_name='protobuf_unittest.TestMutualRecursionA.SubGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='sub_message', full_name='protobuf_unittest.TestMutualRecursionA.SubGroup.sub_message', index=0,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='not_in_this_scc', full_name='protobuf_unittest.TestMutualRecursionA.SubGroup.not_in_this_scc', index=1,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6193,
+  serialized_end=6334,
+)
+
+_TESTMUTUALRECURSIONA = _descriptor.Descriptor(
+  name='TestMutualRecursionA',
+  full_name='protobuf_unittest.TestMutualRecursionA',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bb', full_name='protobuf_unittest.TestMutualRecursionA.bb', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='subgroup', full_name='protobuf_unittest.TestMutualRecursionA.subgroup', index=1,
+      number=2, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTMUTUALRECURSIONA_SUBMESSAGE, _TESTMUTUALRECURSIONA_SUBGROUP, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=5981,
+  serialized_end=6334,
+)
+
+
+_TESTMUTUALRECURSIONB = _descriptor.Descriptor(
+  name='TestMutualRecursionB',
+  full_name='protobuf_unittest.TestMutualRecursionB',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestMutualRecursionB.a', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='protobuf_unittest.TestMutualRecursionB.optional_int32', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6336,
+  serialized_end=6434,
+)
+
+
+_TESTISINITIALIZED_SUBMESSAGE_SUBGROUP = _descriptor.Descriptor(
+  name='SubGroup',
+  full_name='protobuf_unittest.TestIsInitialized.SubMessage.SubGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='i', full_name='protobuf_unittest.TestIsInitialized.SubMessage.SubGroup.i', index=0,
+      number=2, type=5, cpp_type=1, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6618,
+  serialized_end=6639,
+)
+
+_TESTISINITIALIZED_SUBMESSAGE = _descriptor.Descriptor(
+  name='SubMessage',
+  full_name='protobuf_unittest.TestIsInitialized.SubMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='subgroup', full_name='protobuf_unittest.TestIsInitialized.SubMessage.subgroup', index=0,
+      number=1, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTISINITIALIZED_SUBMESSAGE_SUBGROUP, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6528,
+  serialized_end=6639,
+)
+
+_TESTISINITIALIZED = _descriptor.Descriptor(
+  name='TestIsInitialized',
+  full_name='protobuf_unittest.TestIsInitialized',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='sub_message', full_name='protobuf_unittest.TestIsInitialized.sub_message', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTISINITIALIZED_SUBMESSAGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6437,
+  serialized_end=6639,
+)
+
+
+_TESTDUPFIELDNUMBER_FOO = _descriptor.Descriptor(
+  name='Foo',
+  full_name='protobuf_unittest.TestDupFieldNumber.Foo',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestDupFieldNumber.Foo.a', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6787,
+  serialized_end=6803,
+)
+
+_TESTDUPFIELDNUMBER_BAR = _descriptor.Descriptor(
+  name='Bar',
+  full_name='protobuf_unittest.TestDupFieldNumber.Bar',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestDupFieldNumber.Bar.a', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6805,
+  serialized_end=6821,
+)
+
+_TESTDUPFIELDNUMBER = _descriptor.Descriptor(
+  name='TestDupFieldNumber',
+  full_name='protobuf_unittest.TestDupFieldNumber',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestDupFieldNumber.a', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo', full_name='protobuf_unittest.TestDupFieldNumber.foo', index=1,
+      number=2, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bar', full_name='protobuf_unittest.TestDupFieldNumber.bar', index=2,
+      number=3, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTDUPFIELDNUMBER_FOO, _TESTDUPFIELDNUMBER_BAR, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6642,
+  serialized_end=6821,
+)
+
+
+_TESTEAGERMESSAGE = _descriptor.Descriptor(
+  name='TestEagerMessage',
+  full_name='protobuf_unittest.TestEagerMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='sub_message', full_name='protobuf_unittest.TestEagerMessage.sub_message', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'(\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6823,
+  serialized_end=6899,
+)
+
+
+_TESTLAZYMESSAGE = _descriptor.Descriptor(
+  name='TestLazyMessage',
+  full_name='protobuf_unittest.TestLazyMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='sub_message', full_name='protobuf_unittest.TestLazyMessage.sub_message', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'(\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6901,
+  serialized_end=6976,
+)
+
+
+_TESTNESTEDMESSAGEHASBITS_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='protobuf_unittest.TestNestedMessageHasBits.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='nestedmessage_repeated_int32', full_name='protobuf_unittest.TestNestedMessageHasBits.NestedMessage.nestedmessage_repeated_int32', index=0,
+      number=1, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nestedmessage_repeated_foreignmessage', full_name='protobuf_unittest.TestNestedMessageHasBits.NestedMessage.nestedmessage_repeated_foreignmessage', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7100,
+  serialized_end=7235,
+)
+
+_TESTNESTEDMESSAGEHASBITS = _descriptor.Descriptor(
+  name='TestNestedMessageHasBits',
+  full_name='protobuf_unittest.TestNestedMessageHasBits',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_nested_message', full_name='protobuf_unittest.TestNestedMessageHasBits.optional_nested_message', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTNESTEDMESSAGEHASBITS_NESTEDMESSAGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=6979,
+  serialized_end=7235,
+)
+
+
+_TESTCAMELCASEFIELDNAMES = _descriptor.Descriptor(
+  name='TestCamelCaseFieldNames',
+  full_name='protobuf_unittest.TestCamelCaseFieldNames',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='PrimitiveField', full_name='protobuf_unittest.TestCamelCaseFieldNames.PrimitiveField', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='StringField', full_name='protobuf_unittest.TestCamelCaseFieldNames.StringField', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='EnumField', full_name='protobuf_unittest.TestCamelCaseFieldNames.EnumField', index=2,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=4,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='MessageField', full_name='protobuf_unittest.TestCamelCaseFieldNames.MessageField', index=3,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='StringPieceField', full_name='protobuf_unittest.TestCamelCaseFieldNames.StringPieceField', index=4,
+      number=5, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='CordField', full_name='protobuf_unittest.TestCamelCaseFieldNames.CordField', index=5,
+      number=6, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='RepeatedPrimitiveField', full_name='protobuf_unittest.TestCamelCaseFieldNames.RepeatedPrimitiveField', index=6,
+      number=7, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='RepeatedStringField', full_name='protobuf_unittest.TestCamelCaseFieldNames.RepeatedStringField', index=7,
+      number=8, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='RepeatedEnumField', full_name='protobuf_unittest.TestCamelCaseFieldNames.RepeatedEnumField', index=8,
+      number=9, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='RepeatedMessageField', full_name='protobuf_unittest.TestCamelCaseFieldNames.RepeatedMessageField', index=9,
+      number=10, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='RepeatedStringPieceField', full_name='protobuf_unittest.TestCamelCaseFieldNames.RepeatedStringPieceField', index=10,
+      number=11, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='RepeatedCordField', full_name='protobuf_unittest.TestCamelCaseFieldNames.RepeatedCordField', index=11,
+      number=12, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7238,
+  serialized_end=7723,
+)
+
+
+_TESTFIELDORDERINGS_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='protobuf_unittest.TestFieldOrderings.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='oo', full_name='protobuf_unittest.TestFieldOrderings.NestedMessage.oo', index=0,
+      number=2, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bb', full_name='protobuf_unittest.TestFieldOrderings.NestedMessage.bb', index=1,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7888,
+  serialized_end=7927,
+)
+
+_TESTFIELDORDERINGS = _descriptor.Descriptor(
+  name='TestFieldOrderings',
+  full_name='protobuf_unittest.TestFieldOrderings',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='my_string', full_name='protobuf_unittest.TestFieldOrderings.my_string', index=0,
+      number=11, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='my_int', full_name='protobuf_unittest.TestFieldOrderings.my_int', index=1,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='my_float', full_name='protobuf_unittest.TestFieldOrderings.my_float', index=2,
+      number=101, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_message', full_name='protobuf_unittest.TestFieldOrderings.optional_nested_message', index=3,
+      number=200, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTFIELDORDERINGS_NESTEDMESSAGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(2, 11), (12, 101), ],
+  oneofs=[
+  ],
+  serialized_start=7726,
+  serialized_end=7939,
+)
+
+
+_TESTEXTENSIONORDERINGS1 = _descriptor.Descriptor(
+  name='TestExtensionOrderings1',
+  full_name='protobuf_unittest.TestExtensionOrderings1',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='my_string', full_name='protobuf_unittest.TestExtensionOrderings1.my_string', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='test_ext_orderings1', full_name='protobuf_unittest.TestExtensionOrderings1.test_ext_orderings1', index=0,
+      number=13, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=7942,
+  serialized_end=8098,
+)
+
+
+_TESTEXTENSIONORDERINGS2_TESTEXTENSIONORDERINGS3 = _descriptor.Descriptor(
+  name='TestExtensionOrderings3',
+  full_name='protobuf_unittest.TestExtensionOrderings2.TestExtensionOrderings3',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='my_string', full_name='protobuf_unittest.TestExtensionOrderings2.TestExtensionOrderings3.my_string', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='test_ext_orderings3', full_name='protobuf_unittest.TestExtensionOrderings2.TestExtensionOrderings3.test_ext_orderings3', index=0,
+      number=14, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8148,
+  serialized_end=8329,
+)
+
+_TESTEXTENSIONORDERINGS2 = _descriptor.Descriptor(
+  name='TestExtensionOrderings2',
+  full_name='protobuf_unittest.TestExtensionOrderings2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='my_string', full_name='protobuf_unittest.TestExtensionOrderings2.my_string', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='test_ext_orderings2', full_name='protobuf_unittest.TestExtensionOrderings2.test_ext_orderings2', index=0,
+      number=12, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[_TESTEXTENSIONORDERINGS2_TESTEXTENSIONORDERINGS3, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8101,
+  serialized_end=8441,
+)
+
+
+_TESTEXTREMEDEFAULTVALUES = _descriptor.Descriptor(
+  name='TestExtremeDefaultValues',
+  full_name='protobuf_unittest.TestExtremeDefaultValues',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='escaped_bytes', full_name='protobuf_unittest.TestExtremeDefaultValues.escaped_bytes', index=0,
+      number=1, type=12, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"\000\001\007\010\014\n\r\t\013\\\'\"\376",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='large_uint32', full_name='protobuf_unittest.TestExtremeDefaultValues.large_uint32', index=1,
+      number=2, type=13, cpp_type=3, label=1,
+      has_default_value=True, default_value=4294967295,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='large_uint64', full_name='protobuf_unittest.TestExtremeDefaultValues.large_uint64', index=2,
+      number=3, type=4, cpp_type=4, label=1,
+      has_default_value=True, default_value=18446744073709551615,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='small_int32', full_name='protobuf_unittest.TestExtremeDefaultValues.small_int32', index=3,
+      number=4, type=5, cpp_type=1, label=1,
+      has_default_value=True, default_value=-2147483647,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='small_int64', full_name='protobuf_unittest.TestExtremeDefaultValues.small_int64', index=4,
+      number=5, type=3, cpp_type=2, label=1,
+      has_default_value=True, default_value=-9223372036854775807,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='really_small_int32', full_name='protobuf_unittest.TestExtremeDefaultValues.really_small_int32', index=5,
+      number=21, type=5, cpp_type=1, label=1,
+      has_default_value=True, default_value=-2147483648,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='really_small_int64', full_name='protobuf_unittest.TestExtremeDefaultValues.really_small_int64', index=6,
+      number=22, type=3, cpp_type=2, label=1,
+      has_default_value=True, default_value=-9223372036854775808,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='utf8_string', full_name='protobuf_unittest.TestExtremeDefaultValues.utf8_string', index=7,
+      number=6, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"\341\210\264".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='zero_float', full_name='protobuf_unittest.TestExtremeDefaultValues.zero_float', index=8,
+      number=7, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='one_float', full_name='protobuf_unittest.TestExtremeDefaultValues.one_float', index=9,
+      number=8, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=float(1),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='small_float', full_name='protobuf_unittest.TestExtremeDefaultValues.small_float', index=10,
+      number=9, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=float(1.5),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='negative_one_float', full_name='protobuf_unittest.TestExtremeDefaultValues.negative_one_float', index=11,
+      number=10, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=float(-1),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='negative_float', full_name='protobuf_unittest.TestExtremeDefaultValues.negative_float', index=12,
+      number=11, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=float(-1.5),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='large_float', full_name='protobuf_unittest.TestExtremeDefaultValues.large_float', index=13,
+      number=12, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=float(2e+08),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='small_negative_float', full_name='protobuf_unittest.TestExtremeDefaultValues.small_negative_float', index=14,
+      number=13, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=float(-8e-28),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='inf_double', full_name='protobuf_unittest.TestExtremeDefaultValues.inf_double', index=15,
+      number=14, type=1, cpp_type=5, label=1,
+      has_default_value=True, default_value=1e10000,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='neg_inf_double', full_name='protobuf_unittest.TestExtremeDefaultValues.neg_inf_double', index=16,
+      number=15, type=1, cpp_type=5, label=1,
+      has_default_value=True, default_value=-1e10000,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nan_double', full_name='protobuf_unittest.TestExtremeDefaultValues.nan_double', index=17,
+      number=16, type=1, cpp_type=5, label=1,
+      has_default_value=True, default_value=(1e10000 * 0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='inf_float', full_name='protobuf_unittest.TestExtremeDefaultValues.inf_float', index=18,
+      number=17, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=1e10000,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='neg_inf_float', full_name='protobuf_unittest.TestExtremeDefaultValues.neg_inf_float', index=19,
+      number=18, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=-1e10000,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='nan_float', full_name='protobuf_unittest.TestExtremeDefaultValues.nan_float', index=20,
+      number=19, type=2, cpp_type=6, label=1,
+      has_default_value=True, default_value=(1e10000 * 0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='cpp_trigraph', full_name='protobuf_unittest.TestExtremeDefaultValues.cpp_trigraph', index=21,
+      number=20, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"? ? ?? ?? ??? ??/ ??-".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_with_zero', full_name='protobuf_unittest.TestExtremeDefaultValues.string_with_zero', index=22,
+      number=23, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"hel\000lo".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bytes_with_zero', full_name='protobuf_unittest.TestExtremeDefaultValues.bytes_with_zero', index=23,
+      number=24, type=12, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"wor\000ld",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_piece_with_zero', full_name='protobuf_unittest.TestExtremeDefaultValues.string_piece_with_zero', index=24,
+      number=25, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"ab\000c".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='cord_with_zero', full_name='protobuf_unittest.TestExtremeDefaultValues.cord_with_zero', index=25,
+      number=26, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"12\0003".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='replacement_string', full_name='protobuf_unittest.TestExtremeDefaultValues.replacement_string', index=26,
+      number=27, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"${unknown}".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=8444,
+  serialized_end=9394,
+)
+
+
+_SPARSEENUMMESSAGE = _descriptor.Descriptor(
+  name='SparseEnumMessage',
+  full_name='protobuf_unittest.SparseEnumMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='sparse_enum', full_name='protobuf_unittest.SparseEnumMessage.sparse_enum', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=123,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9396,
+  serialized_end=9471,
+)
+
+
+_ONESTRING = _descriptor.Descriptor(
+  name='OneString',
+  full_name='protobuf_unittest.OneString',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='data', full_name='protobuf_unittest.OneString.data', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9473,
+  serialized_end=9498,
+)
+
+
+_MORESTRING = _descriptor.Descriptor(
+  name='MoreString',
+  full_name='protobuf_unittest.MoreString',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='data', full_name='protobuf_unittest.MoreString.data', index=0,
+      number=1, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9500,
+  serialized_end=9526,
+)
+
+
+_ONEBYTES = _descriptor.Descriptor(
+  name='OneBytes',
+  full_name='protobuf_unittest.OneBytes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='data', full_name='protobuf_unittest.OneBytes.data', index=0,
+      number=1, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9528,
+  serialized_end=9552,
+)
+
+
+_MOREBYTES = _descriptor.Descriptor(
+  name='MoreBytes',
+  full_name='protobuf_unittest.MoreBytes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='data', full_name='protobuf_unittest.MoreBytes.data', index=0,
+      number=1, type=12, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9554,
+  serialized_end=9579,
+)
+
+
+_INT32MESSAGE = _descriptor.Descriptor(
+  name='Int32Message',
+  full_name='protobuf_unittest.Int32Message',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='data', full_name='protobuf_unittest.Int32Message.data', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9581,
+  serialized_end=9609,
+)
+
+
+_UINT32MESSAGE = _descriptor.Descriptor(
+  name='Uint32Message',
+  full_name='protobuf_unittest.Uint32Message',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='data', full_name='protobuf_unittest.Uint32Message.data', index=0,
+      number=1, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9611,
+  serialized_end=9640,
+)
+
+
+_INT64MESSAGE = _descriptor.Descriptor(
+  name='Int64Message',
+  full_name='protobuf_unittest.Int64Message',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='data', full_name='protobuf_unittest.Int64Message.data', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9642,
+  serialized_end=9670,
+)
+
+
+_UINT64MESSAGE = _descriptor.Descriptor(
+  name='Uint64Message',
+  full_name='protobuf_unittest.Uint64Message',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='data', full_name='protobuf_unittest.Uint64Message.data', index=0,
+      number=1, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9672,
+  serialized_end=9701,
+)
+
+
+_BOOLMESSAGE = _descriptor.Descriptor(
+  name='BoolMessage',
+  full_name='protobuf_unittest.BoolMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='data', full_name='protobuf_unittest.BoolMessage.data', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9703,
+  serialized_end=9730,
+)
+
+
+_TESTONEOF_FOOGROUP = _descriptor.Descriptor(
+  name='FooGroup',
+  full_name='protobuf_unittest.TestOneof.FooGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestOneof.FooGroup.a', index=0,
+      number=5, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='b', full_name='protobuf_unittest.TestOneof.FooGroup.b', index=1,
+      number=6, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9902,
+  serialized_end=9934,
+)
+
+_TESTONEOF = _descriptor.Descriptor(
+  name='TestOneof',
+  full_name='protobuf_unittest.TestOneof',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='foo_int', full_name='protobuf_unittest.TestOneof.foo_int', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_string', full_name='protobuf_unittest.TestOneof.foo_string', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_message', full_name='protobuf_unittest.TestOneof.foo_message', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foogroup', full_name='protobuf_unittest.TestOneof.foogroup', index=3,
+      number=4, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTONEOF_FOOGROUP, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='foo', full_name='protobuf_unittest.TestOneof.foo',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=9733,
+  serialized_end=9941,
+)
+
+
+_TESTONEOFBACKWARDSCOMPATIBLE_FOOGROUP = _descriptor.Descriptor(
+  name='FooGroup',
+  full_name='protobuf_unittest.TestOneofBackwardsCompatible.FooGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestOneofBackwardsCompatible.FooGroup.a', index=0,
+      number=5, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='b', full_name='protobuf_unittest.TestOneofBackwardsCompatible.FooGroup.b', index=1,
+      number=6, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9902,
+  serialized_end=9934,
+)
+
+_TESTONEOFBACKWARDSCOMPATIBLE = _descriptor.Descriptor(
+  name='TestOneofBackwardsCompatible',
+  full_name='protobuf_unittest.TestOneofBackwardsCompatible',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='foo_int', full_name='protobuf_unittest.TestOneofBackwardsCompatible.foo_int', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_string', full_name='protobuf_unittest.TestOneofBackwardsCompatible.foo_string', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_message', full_name='protobuf_unittest.TestOneofBackwardsCompatible.foo_message', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foogroup', full_name='protobuf_unittest.TestOneofBackwardsCompatible.foogroup', index=3,
+      number=4, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTONEOFBACKWARDSCOMPATIBLE_FOOGROUP, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=9944,
+  serialized_end=10175,
+)
+
+
+_TESTONEOF2_FOOGROUP = _descriptor.Descriptor(
+  name='FooGroup',
+  full_name='protobuf_unittest.TestOneof2.FooGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestOneof2.FooGroup.a', index=0,
+      number=9, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='b', full_name='protobuf_unittest.TestOneof2.FooGroup.b', index=1,
+      number=10, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=10836,
+  serialized_end=10868,
+)
+
+_TESTONEOF2_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='protobuf_unittest.TestOneof2.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='qux_int', full_name='protobuf_unittest.TestOneof2.NestedMessage.qux_int', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='corge_int', full_name='protobuf_unittest.TestOneof2.NestedMessage.corge_int', index=1,
+      number=2, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=10870,
+  serialized_end=10921,
+)
+
+_TESTONEOF2 = _descriptor.Descriptor(
+  name='TestOneof2',
+  full_name='protobuf_unittest.TestOneof2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='foo_int', full_name='protobuf_unittest.TestOneof2.foo_int', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_string', full_name='protobuf_unittest.TestOneof2.foo_string', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_cord', full_name='protobuf_unittest.TestOneof2.foo_cord', index=2,
+      number=3, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_string_piece', full_name='protobuf_unittest.TestOneof2.foo_string_piece', index=3,
+      number=4, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_bytes', full_name='protobuf_unittest.TestOneof2.foo_bytes', index=4,
+      number=5, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_enum', full_name='protobuf_unittest.TestOneof2.foo_enum', index=5,
+      number=6, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_message', full_name='protobuf_unittest.TestOneof2.foo_message', index=6,
+      number=7, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foogroup', full_name='protobuf_unittest.TestOneof2.foogroup', index=7,
+      number=8, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_lazy_message', full_name='protobuf_unittest.TestOneof2.foo_lazy_message', index=8,
+      number=11, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'(\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bar_int', full_name='protobuf_unittest.TestOneof2.bar_int', index=9,
+      number=12, type=5, cpp_type=1, label=1,
+      has_default_value=True, default_value=5,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bar_string', full_name='protobuf_unittest.TestOneof2.bar_string', index=10,
+      number=13, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"STRING".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bar_cord', full_name='protobuf_unittest.TestOneof2.bar_cord', index=11,
+      number=14, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"CORD".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bar_string_piece', full_name='protobuf_unittest.TestOneof2.bar_string_piece', index=12,
+      number=15, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"SPIECE".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bar_bytes', full_name='protobuf_unittest.TestOneof2.bar_bytes', index=13,
+      number=16, type=12, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"BYTES",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bar_enum', full_name='protobuf_unittest.TestOneof2.bar_enum', index=14,
+      number=17, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=2,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='baz_int', full_name='protobuf_unittest.TestOneof2.baz_int', index=15,
+      number=18, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='baz_string', full_name='protobuf_unittest.TestOneof2.baz_string', index=16,
+      number=19, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"BAZ".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTONEOF2_FOOGROUP, _TESTONEOF2_NESTEDMESSAGE, ],
+  enum_types=[
+    _TESTONEOF2_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='foo', full_name='protobuf_unittest.TestOneof2.foo',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+    _descriptor.OneofDescriptor(
+      name='bar', full_name='protobuf_unittest.TestOneof2.bar',
+      index=1, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=10178,
+  serialized_end=10976,
+)
+
+
+_TESTREQUIREDONEOF_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='protobuf_unittest.TestRequiredOneof.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='required_double', full_name='protobuf_unittest.TestRequiredOneof.NestedMessage.required_double', index=0,
+      number=1, type=1, cpp_type=5, label=2,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=11116,
+  serialized_end=11156,
+)
+
+_TESTREQUIREDONEOF = _descriptor.Descriptor(
+  name='TestRequiredOneof',
+  full_name='protobuf_unittest.TestRequiredOneof',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='foo_int', full_name='protobuf_unittest.TestRequiredOneof.foo_int', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_string', full_name='protobuf_unittest.TestRequiredOneof.foo_string', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='foo_message', full_name='protobuf_unittest.TestRequiredOneof.foo_message', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTREQUIREDONEOF_NESTEDMESSAGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='foo', full_name='protobuf_unittest.TestRequiredOneof.foo',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=10979,
+  serialized_end=11163,
+)
+
+
+_TESTPACKEDTYPES = _descriptor.Descriptor(
+  name='TestPackedTypes',
+  full_name='protobuf_unittest.TestPackedTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='packed_int32', full_name='protobuf_unittest.TestPackedTypes.packed_int32', index=0,
+      number=90, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_int64', full_name='protobuf_unittest.TestPackedTypes.packed_int64', index=1,
+      number=91, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_uint32', full_name='protobuf_unittest.TestPackedTypes.packed_uint32', index=2,
+      number=92, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_uint64', full_name='protobuf_unittest.TestPackedTypes.packed_uint64', index=3,
+      number=93, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sint32', full_name='protobuf_unittest.TestPackedTypes.packed_sint32', index=4,
+      number=94, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sint64', full_name='protobuf_unittest.TestPackedTypes.packed_sint64', index=5,
+      number=95, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_fixed32', full_name='protobuf_unittest.TestPackedTypes.packed_fixed32', index=6,
+      number=96, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_fixed64', full_name='protobuf_unittest.TestPackedTypes.packed_fixed64', index=7,
+      number=97, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sfixed32', full_name='protobuf_unittest.TestPackedTypes.packed_sfixed32', index=8,
+      number=98, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sfixed64', full_name='protobuf_unittest.TestPackedTypes.packed_sfixed64', index=9,
+      number=99, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_float', full_name='protobuf_unittest.TestPackedTypes.packed_float', index=10,
+      number=100, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_double', full_name='protobuf_unittest.TestPackedTypes.packed_double', index=11,
+      number=101, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_bool', full_name='protobuf_unittest.TestPackedTypes.packed_bool', index=12,
+      number=102, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_enum', full_name='protobuf_unittest.TestPackedTypes.packed_enum', index=13,
+      number=103, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=11166,
+  serialized_end=11592,
+)
+
+
+_TESTUNPACKEDTYPES = _descriptor.Descriptor(
+  name='TestUnpackedTypes',
+  full_name='protobuf_unittest.TestUnpackedTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='unpacked_int32', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_int32', index=0,
+      number=90, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_int64', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_int64', index=1,
+      number=91, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_uint32', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_uint32', index=2,
+      number=92, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_uint64', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_uint64', index=3,
+      number=93, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_sint32', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_sint32', index=4,
+      number=94, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_sint64', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_sint64', index=5,
+      number=95, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_fixed32', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_fixed32', index=6,
+      number=96, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_fixed64', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_fixed64', index=7,
+      number=97, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_sfixed32', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_sfixed32', index=8,
+      number=98, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_sfixed64', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_sfixed64', index=9,
+      number=99, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_float', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_float', index=10,
+      number=100, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_double', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_double', index=11,
+      number=101, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_bool', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_bool', index=12,
+      number=102, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='unpacked_enum', full_name='protobuf_unittest.TestUnpackedTypes.unpacked_enum', index=13,
+      number=103, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=11595,
+  serialized_end=12051,
+)
+
+
+_TESTPACKEDEXTENSIONS = _descriptor.Descriptor(
+  name='TestPackedExtensions',
+  full_name='protobuf_unittest.TestPackedExtensions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=12053,
+  serialized_end=12085,
+)
+
+
+_TESTUNPACKEDEXTENSIONS = _descriptor.Descriptor(
+  name='TestUnpackedExtensions',
+  full_name='protobuf_unittest.TestUnpackedExtensions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=12087,
+  serialized_end=12121,
+)
+
+
+_TESTDYNAMICEXTENSIONS_DYNAMICMESSAGETYPE = _descriptor.Descriptor(
+  name='DynamicMessageType',
+  full_name='protobuf_unittest.TestDynamicExtensions.DynamicMessageType',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='dynamic_field', full_name='protobuf_unittest.TestDynamicExtensions.DynamicMessageType.dynamic_field', index=0,
+      number=2100, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=12544,
+  serialized_end=12588,
+)
+
+_TESTDYNAMICEXTENSIONS = _descriptor.Descriptor(
+  name='TestDynamicExtensions',
+  full_name='protobuf_unittest.TestDynamicExtensions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='scalar_extension', full_name='protobuf_unittest.TestDynamicExtensions.scalar_extension', index=0,
+      number=2000, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='enum_extension', full_name='protobuf_unittest.TestDynamicExtensions.enum_extension', index=1,
+      number=2001, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=4,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dynamic_enum_extension', full_name='protobuf_unittest.TestDynamicExtensions.dynamic_enum_extension', index=2,
+      number=2002, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=2200,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='message_extension', full_name='protobuf_unittest.TestDynamicExtensions.message_extension', index=3,
+      number=2003, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='dynamic_message_extension', full_name='protobuf_unittest.TestDynamicExtensions.dynamic_message_extension', index=4,
+      number=2004, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_extension', full_name='protobuf_unittest.TestDynamicExtensions.repeated_extension', index=5,
+      number=2005, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_extension', full_name='protobuf_unittest.TestDynamicExtensions.packed_extension', index=6,
+      number=2006, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTDYNAMICEXTENSIONS_DYNAMICMESSAGETYPE, ],
+  enum_types=[
+    _TESTDYNAMICEXTENSIONS_DYNAMICENUMTYPE,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=12124,
+  serialized_end=12661,
+)
+
+
+_TESTREPEATEDSCALARDIFFERENTTAGSIZES = _descriptor.Descriptor(
+  name='TestRepeatedScalarDifferentTagSizes',
+  full_name='protobuf_unittest.TestRepeatedScalarDifferentTagSizes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed32', full_name='protobuf_unittest.TestRepeatedScalarDifferentTagSizes.repeated_fixed32', index=0,
+      number=12, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int32', full_name='protobuf_unittest.TestRepeatedScalarDifferentTagSizes.repeated_int32', index=1,
+      number=13, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed64', full_name='protobuf_unittest.TestRepeatedScalarDifferentTagSizes.repeated_fixed64', index=2,
+      number=2046, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64', full_name='protobuf_unittest.TestRepeatedScalarDifferentTagSizes.repeated_int64', index=3,
+      number=2047, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float', full_name='protobuf_unittest.TestRepeatedScalarDifferentTagSizes.repeated_float', index=4,
+      number=262142, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint64', full_name='protobuf_unittest.TestRepeatedScalarDifferentTagSizes.repeated_uint64', index=5,
+      number=262143, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=12664,
+  serialized_end=12856,
+)
+
+
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP1 = _descriptor.Descriptor(
+  name='Group1',
+  full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.Group1',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field1', full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.Group1.field1', index=0,
+      number=11, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=13649,
+  serialized_end=13706,
+)
+
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP2 = _descriptor.Descriptor(
+  name='Group2',
+  full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.Group2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field1', full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.Group2.field1', index=0,
+      number=21, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=13708,
+  serialized_end=13765,
+)
+
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR = _descriptor.Descriptor(
+  name='RepeatedFieldsGenerator',
+  full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field1', full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.field1', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field2', full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.field2', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field3', full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.field3', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='group1', full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.group1', index=3,
+      number=10, type=10, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='group2', full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.group2', index=4,
+      number=20, type=10, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='ext1', full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.ext1', index=5,
+      number=1000, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='ext2', full_name='protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.ext2', index=6,
+      number=1001, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP1, _TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP2, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=13211,
+  serialized_end=13765,
+)
+
+_TESTPARSINGMERGE_OPTIONALGROUP = _descriptor.Descriptor(
+  name='OptionalGroup',
+  full_name='protobuf_unittest.TestParsingMerge.OptionalGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_group_all_types', full_name='protobuf_unittest.TestParsingMerge.OptionalGroup.optional_group_all_types', index=0,
+      number=11, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=13767,
+  serialized_end=13849,
+)
+
+_TESTPARSINGMERGE_REPEATEDGROUP = _descriptor.Descriptor(
+  name='RepeatedGroup',
+  full_name='protobuf_unittest.TestParsingMerge.RepeatedGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='repeated_group_all_types', full_name='protobuf_unittest.TestParsingMerge.RepeatedGroup.repeated_group_all_types', index=0,
+      number=21, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=13851,
+  serialized_end=13933,
+)
+
+_TESTPARSINGMERGE = _descriptor.Descriptor(
+  name='TestParsingMerge',
+  full_name='protobuf_unittest.TestParsingMerge',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='required_all_types', full_name='protobuf_unittest.TestParsingMerge.required_all_types', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_all_types', full_name='protobuf_unittest.TestParsingMerge.optional_all_types', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_all_types', full_name='protobuf_unittest.TestParsingMerge.repeated_all_types', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optionalgroup', full_name='protobuf_unittest.TestParsingMerge.optionalgroup', index=3,
+      number=10, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeatedgroup', full_name='protobuf_unittest.TestParsingMerge.repeatedgroup', index=4,
+      number=20, type=10, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='optional_ext', full_name='protobuf_unittest.TestParsingMerge.optional_ext', index=0,
+      number=1000, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_ext', full_name='protobuf_unittest.TestParsingMerge.repeated_ext', index=1,
+      number=1001, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR, _TESTPARSINGMERGE_OPTIONALGROUP, _TESTPARSINGMERGE_REPEATEDGROUP, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(1000, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=12859,
+  serialized_end=14130,
+)
+
+
+_TESTCOMMENTINJECTIONMESSAGE = _descriptor.Descriptor(
+  name='TestCommentInjectionMessage',
+  full_name='protobuf_unittest.TestCommentInjectionMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestCommentInjectionMessage.a', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=b"*/ <- Neither should this.".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=14132,
+  serialized_end=14200,
+)
+
+
+_FOOREQUEST = _descriptor.Descriptor(
+  name='FooRequest',
+  full_name='protobuf_unittest.FooRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=14202,
+  serialized_end=14214,
+)
+
+
+_FOORESPONSE = _descriptor.Descriptor(
+  name='FooResponse',
+  full_name='protobuf_unittest.FooResponse',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=14216,
+  serialized_end=14229,
+)
+
+
+_FOOCLIENTMESSAGE = _descriptor.Descriptor(
+  name='FooClientMessage',
+  full_name='protobuf_unittest.FooClientMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=14231,
+  serialized_end=14249,
+)
+
+
+_FOOSERVERMESSAGE = _descriptor.Descriptor(
+  name='FooServerMessage',
+  full_name='protobuf_unittest.FooServerMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=14251,
+  serialized_end=14269,
+)
+
+
+_BARREQUEST = _descriptor.Descriptor(
+  name='BarRequest',
+  full_name='protobuf_unittest.BarRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=14271,
+  serialized_end=14283,
+)
+
+
+_BARRESPONSE = _descriptor.Descriptor(
+  name='BarResponse',
+  full_name='protobuf_unittest.BarResponse',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=14285,
+  serialized_end=14298,
+)
+
+
+_TESTJSONNAME = _descriptor.Descriptor(
+  name='TestJsonName',
+  full_name='protobuf_unittest.TestJsonName',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field_name1', full_name='protobuf_unittest.TestJsonName.field_name1', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='fieldName2', full_name='protobuf_unittest.TestJsonName.fieldName2', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='FieldName3', full_name='protobuf_unittest.TestJsonName.FieldName3', index=2,
+      number=3, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='_field_name4', full_name='protobuf_unittest.TestJsonName._field_name4', index=3,
+      number=4, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='FIELD_NAME5', full_name='protobuf_unittest.TestJsonName.FIELD_NAME5', index=4,
+      number=5, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field_name6', full_name='protobuf_unittest.TestJsonName.field_name6', index=5,
+      number=6, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, json_name='@type', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=14301,
+  serialized_end=14447,
+)
+
+
+_TESTHUGEFIELDNUMBERS_OPTIONALGROUP = _descriptor.Descriptor(
+  name='OptionalGroup',
+  full_name='protobuf_unittest.TestHugeFieldNumbers.OptionalGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='group_a', full_name='protobuf_unittest.TestHugeFieldNumbers.OptionalGroup.group_a', index=0,
+      number=536870009, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=15094,
+  serialized_end=15130,
+)
+
+_TESTHUGEFIELDNUMBERS_STRINGSTRINGMAPENTRY = _descriptor.Descriptor(
+  name='StringStringMapEntry',
+  full_name='protobuf_unittest.TestHugeFieldNumbers.StringStringMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestHugeFieldNumbers.StringStringMapEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestHugeFieldNumbers.StringStringMapEntry.value', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=15132,
+  serialized_end=15186,
+)
+
+_TESTHUGEFIELDNUMBERS = _descriptor.Descriptor(
+  name='TestHugeFieldNumbers',
+  full_name='protobuf_unittest.TestHugeFieldNumbers',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='protobuf_unittest.TestHugeFieldNumbers.optional_int32', index=0,
+      number=536870000, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='fixed_32', full_name='protobuf_unittest.TestHugeFieldNumbers.fixed_32', index=1,
+      number=536870001, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int32', full_name='protobuf_unittest.TestHugeFieldNumbers.repeated_int32', index=2,
+      number=536870002, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_int32', full_name='protobuf_unittest.TestHugeFieldNumbers.packed_int32', index=3,
+      number=536870003, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_enum', full_name='protobuf_unittest.TestHugeFieldNumbers.optional_enum', index=4,
+      number=536870004, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=4,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string', full_name='protobuf_unittest.TestHugeFieldNumbers.optional_string', index=5,
+      number=536870005, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bytes', full_name='protobuf_unittest.TestHugeFieldNumbers.optional_bytes', index=6,
+      number=536870006, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_message', full_name='protobuf_unittest.TestHugeFieldNumbers.optional_message', index=7,
+      number=536870007, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optionalgroup', full_name='protobuf_unittest.TestHugeFieldNumbers.optionalgroup', index=8,
+      number=536870008, type=10, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_string_map', full_name='protobuf_unittest.TestHugeFieldNumbers.string_string_map', index=9,
+      number=536870010, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_uint32', full_name='protobuf_unittest.TestHugeFieldNumbers.oneof_uint32', index=10,
+      number=536870011, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_test_all_types', full_name='protobuf_unittest.TestHugeFieldNumbers.oneof_test_all_types', index=11,
+      number=536870012, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_string', full_name='protobuf_unittest.TestHugeFieldNumbers.oneof_string', index=12,
+      number=536870013, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_bytes', full_name='protobuf_unittest.TestHugeFieldNumbers.oneof_bytes', index=13,
+      number=536870014, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTHUGEFIELDNUMBERS_OPTIONALGROUP, _TESTHUGEFIELDNUMBERS_STRINGSTRINGMAPENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(536860000, 536870000), ],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='oneof_field', full_name='protobuf_unittest.TestHugeFieldNumbers.oneof_field',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=14450,
+  serialized_end=15215,
+)
+
+
+_TESTEXTENSIONINSIDETABLE = _descriptor.Descriptor(
+  name='TestExtensionInsideTable',
+  full_name='protobuf_unittest.TestExtensionInsideTable',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field1', full_name='protobuf_unittest.TestExtensionInsideTable.field1', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field2', full_name='protobuf_unittest.TestExtensionInsideTable.field2', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field3', full_name='protobuf_unittest.TestExtensionInsideTable.field3', index=2,
+      number=3, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field4', full_name='protobuf_unittest.TestExtensionInsideTable.field4', index=3,
+      number=4, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field6', full_name='protobuf_unittest.TestExtensionInsideTable.field6', index=4,
+      number=6, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field7', full_name='protobuf_unittest.TestExtensionInsideTable.field7', index=5,
+      number=7, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field8', full_name='protobuf_unittest.TestExtensionInsideTable.field8', index=6,
+      number=8, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field9', full_name='protobuf_unittest.TestExtensionInsideTable.field9', index=7,
+      number=9, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='field10', full_name='protobuf_unittest.TestExtensionInsideTable.field10', index=8,
+      number=10, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(5, 6), ],
+  oneofs=[
+  ],
+  serialized_start=15218,
+  serialized_end=15395,
+)
+
+_TESTALLTYPES_NESTEDMESSAGE.containing_type = _TESTALLTYPES
+_TESTALLTYPES_OPTIONALGROUP.containing_type = _TESTALLTYPES
+_TESTALLTYPES_REPEATEDGROUP.containing_type = _TESTALLTYPES
+_TESTALLTYPES.fields_by_name['optionalgroup'].message_type = _TESTALLTYPES_OPTIONALGROUP
+_TESTALLTYPES.fields_by_name['optional_nested_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES.fields_by_name['optional_foreign_message'].message_type = _FOREIGNMESSAGE
+_TESTALLTYPES.fields_by_name['optional_import_message'].message_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTMESSAGE
+_TESTALLTYPES.fields_by_name['optional_nested_enum'].enum_type = _TESTALLTYPES_NESTEDENUM
+_TESTALLTYPES.fields_by_name['optional_foreign_enum'].enum_type = _FOREIGNENUM
+_TESTALLTYPES.fields_by_name['optional_import_enum'].enum_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTENUM
+_TESTALLTYPES.fields_by_name['optional_public_import_message'].message_type = google_dot_protobuf_dot_unittest__import__public__pb2._PUBLICIMPORTMESSAGE
+_TESTALLTYPES.fields_by_name['optional_lazy_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES.fields_by_name['repeatedgroup'].message_type = _TESTALLTYPES_REPEATEDGROUP
+_TESTALLTYPES.fields_by_name['repeated_nested_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES.fields_by_name['repeated_foreign_message'].message_type = _FOREIGNMESSAGE
+_TESTALLTYPES.fields_by_name['repeated_import_message'].message_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTMESSAGE
+_TESTALLTYPES.fields_by_name['repeated_nested_enum'].enum_type = _TESTALLTYPES_NESTEDENUM
+_TESTALLTYPES.fields_by_name['repeated_foreign_enum'].enum_type = _FOREIGNENUM
+_TESTALLTYPES.fields_by_name['repeated_import_enum'].enum_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTENUM
+_TESTALLTYPES.fields_by_name['repeated_lazy_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES.fields_by_name['default_nested_enum'].enum_type = _TESTALLTYPES_NESTEDENUM
+_TESTALLTYPES.fields_by_name['default_foreign_enum'].enum_type = _FOREIGNENUM
+_TESTALLTYPES.fields_by_name['default_import_enum'].enum_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTENUM
+_TESTALLTYPES.fields_by_name['oneof_nested_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES_NESTEDENUM.containing_type = _TESTALLTYPES
+_TESTALLTYPES.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPES.fields_by_name['oneof_uint32'])
+_TESTALLTYPES.fields_by_name['oneof_uint32'].containing_oneof = _TESTALLTYPES.oneofs_by_name['oneof_field']
+_TESTALLTYPES.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPES.fields_by_name['oneof_nested_message'])
+_TESTALLTYPES.fields_by_name['oneof_nested_message'].containing_oneof = _TESTALLTYPES.oneofs_by_name['oneof_field']
+_TESTALLTYPES.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPES.fields_by_name['oneof_string'])
+_TESTALLTYPES.fields_by_name['oneof_string'].containing_oneof = _TESTALLTYPES.oneofs_by_name['oneof_field']
+_TESTALLTYPES.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPES.fields_by_name['oneof_bytes'])
+_TESTALLTYPES.fields_by_name['oneof_bytes'].containing_oneof = _TESTALLTYPES.oneofs_by_name['oneof_field']
+_NESTEDTESTALLTYPES.fields_by_name['child'].message_type = _NESTEDTESTALLTYPES
+_NESTEDTESTALLTYPES.fields_by_name['payload'].message_type = _TESTALLTYPES
+_NESTEDTESTALLTYPES.fields_by_name['repeated_child'].message_type = _NESTEDTESTALLTYPES
+_TESTDEPRECATEDFIELDS.oneofs_by_name['oneof_fields'].fields.append(
+  _TESTDEPRECATEDFIELDS.fields_by_name['deprecated_int32_in_oneof'])
+_TESTDEPRECATEDFIELDS.fields_by_name['deprecated_int32_in_oneof'].containing_oneof = _TESTDEPRECATEDFIELDS.oneofs_by_name['oneof_fields']
+_TESTGROUP_OPTIONALGROUP.containing_type = _TESTGROUP
+_TESTGROUP.fields_by_name['optionalgroup'].message_type = _TESTGROUP_OPTIONALGROUP
+_TESTGROUP.fields_by_name['optional_foreign_enum'].enum_type = _FOREIGNENUM
+_TESTNESTEDEXTENSION_OPTIONALGROUP_EXTENSION.containing_type = _TESTNESTEDEXTENSION
+_TESTREQUIREDFOREIGN.fields_by_name['optional_message'].message_type = _TESTREQUIRED
+_TESTREQUIREDFOREIGN.fields_by_name['repeated_message'].message_type = _TESTREQUIRED
+_TESTREQUIREDMESSAGE.fields_by_name['optional_message'].message_type = _TESTREQUIRED
+_TESTREQUIREDMESSAGE.fields_by_name['repeated_message'].message_type = _TESTREQUIRED
+_TESTREQUIREDMESSAGE.fields_by_name['required_message'].message_type = _TESTREQUIRED
+_TESTFOREIGNNESTED.fields_by_name['foreign_nested'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE_NESTEDNESTEDMESSAGE.containing_type = _TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE
+_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE.containing_type = _TESTPICKLENESTEDMESSAGE
+_TESTRECURSIVEMESSAGE.fields_by_name['a'].message_type = _TESTRECURSIVEMESSAGE
+_TESTMUTUALRECURSIONA_SUBMESSAGE.fields_by_name['b'].message_type = _TESTMUTUALRECURSIONB
+_TESTMUTUALRECURSIONA_SUBMESSAGE.containing_type = _TESTMUTUALRECURSIONA
+_TESTMUTUALRECURSIONA_SUBGROUP.fields_by_name['sub_message'].message_type = _TESTMUTUALRECURSIONA_SUBMESSAGE
+_TESTMUTUALRECURSIONA_SUBGROUP.fields_by_name['not_in_this_scc'].message_type = _TESTALLTYPES
+_TESTMUTUALRECURSIONA_SUBGROUP.containing_type = _TESTMUTUALRECURSIONA
+_TESTMUTUALRECURSIONA.fields_by_name['bb'].message_type = _TESTMUTUALRECURSIONB
+_TESTMUTUALRECURSIONA.fields_by_name['subgroup'].message_type = _TESTMUTUALRECURSIONA_SUBGROUP
+_TESTMUTUALRECURSIONB.fields_by_name['a'].message_type = _TESTMUTUALRECURSIONA
+_TESTISINITIALIZED_SUBMESSAGE_SUBGROUP.containing_type = _TESTISINITIALIZED_SUBMESSAGE
+_TESTISINITIALIZED_SUBMESSAGE.fields_by_name['subgroup'].message_type = _TESTISINITIALIZED_SUBMESSAGE_SUBGROUP
+_TESTISINITIALIZED_SUBMESSAGE.containing_type = _TESTISINITIALIZED
+_TESTISINITIALIZED.fields_by_name['sub_message'].message_type = _TESTISINITIALIZED_SUBMESSAGE
+_TESTDUPFIELDNUMBER_FOO.containing_type = _TESTDUPFIELDNUMBER
+_TESTDUPFIELDNUMBER_BAR.containing_type = _TESTDUPFIELDNUMBER
+_TESTDUPFIELDNUMBER.fields_by_name['foo'].message_type = _TESTDUPFIELDNUMBER_FOO
+_TESTDUPFIELDNUMBER.fields_by_name['bar'].message_type = _TESTDUPFIELDNUMBER_BAR
+_TESTEAGERMESSAGE.fields_by_name['sub_message'].message_type = _TESTALLTYPES
+_TESTLAZYMESSAGE.fields_by_name['sub_message'].message_type = _TESTALLTYPES
+_TESTNESTEDMESSAGEHASBITS_NESTEDMESSAGE.fields_by_name['nestedmessage_repeated_foreignmessage'].message_type = _FOREIGNMESSAGE
+_TESTNESTEDMESSAGEHASBITS_NESTEDMESSAGE.containing_type = _TESTNESTEDMESSAGEHASBITS
+_TESTNESTEDMESSAGEHASBITS.fields_by_name['optional_nested_message'].message_type = _TESTNESTEDMESSAGEHASBITS_NESTEDMESSAGE
+_TESTCAMELCASEFIELDNAMES.fields_by_name['EnumField'].enum_type = _FOREIGNENUM
+_TESTCAMELCASEFIELDNAMES.fields_by_name['MessageField'].message_type = _FOREIGNMESSAGE
+_TESTCAMELCASEFIELDNAMES.fields_by_name['RepeatedEnumField'].enum_type = _FOREIGNENUM
+_TESTCAMELCASEFIELDNAMES.fields_by_name['RepeatedMessageField'].message_type = _FOREIGNMESSAGE
+_TESTFIELDORDERINGS_NESTEDMESSAGE.containing_type = _TESTFIELDORDERINGS
+_TESTFIELDORDERINGS.fields_by_name['optional_nested_message'].message_type = _TESTFIELDORDERINGS_NESTEDMESSAGE
+_TESTEXTENSIONORDERINGS2_TESTEXTENSIONORDERINGS3.containing_type = _TESTEXTENSIONORDERINGS2
+_SPARSEENUMMESSAGE.fields_by_name['sparse_enum'].enum_type = _TESTSPARSEENUM
+_TESTONEOF_FOOGROUP.containing_type = _TESTONEOF
+_TESTONEOF.fields_by_name['foo_message'].message_type = _TESTALLTYPES
+_TESTONEOF.fields_by_name['foogroup'].message_type = _TESTONEOF_FOOGROUP
+_TESTONEOF.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF.fields_by_name['foo_int'])
+_TESTONEOF.fields_by_name['foo_int'].containing_oneof = _TESTONEOF.oneofs_by_name['foo']
+_TESTONEOF.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF.fields_by_name['foo_string'])
+_TESTONEOF.fields_by_name['foo_string'].containing_oneof = _TESTONEOF.oneofs_by_name['foo']
+_TESTONEOF.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF.fields_by_name['foo_message'])
+_TESTONEOF.fields_by_name['foo_message'].containing_oneof = _TESTONEOF.oneofs_by_name['foo']
+_TESTONEOF.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF.fields_by_name['foogroup'])
+_TESTONEOF.fields_by_name['foogroup'].containing_oneof = _TESTONEOF.oneofs_by_name['foo']
+_TESTONEOFBACKWARDSCOMPATIBLE_FOOGROUP.containing_type = _TESTONEOFBACKWARDSCOMPATIBLE
+_TESTONEOFBACKWARDSCOMPATIBLE.fields_by_name['foo_message'].message_type = _TESTALLTYPES
+_TESTONEOFBACKWARDSCOMPATIBLE.fields_by_name['foogroup'].message_type = _TESTONEOFBACKWARDSCOMPATIBLE_FOOGROUP
+_TESTONEOF2_FOOGROUP.containing_type = _TESTONEOF2
+_TESTONEOF2_NESTEDMESSAGE.containing_type = _TESTONEOF2
+_TESTONEOF2.fields_by_name['foo_enum'].enum_type = _TESTONEOF2_NESTEDENUM
+_TESTONEOF2.fields_by_name['foo_message'].message_type = _TESTONEOF2_NESTEDMESSAGE
+_TESTONEOF2.fields_by_name['foogroup'].message_type = _TESTONEOF2_FOOGROUP
+_TESTONEOF2.fields_by_name['foo_lazy_message'].message_type = _TESTONEOF2_NESTEDMESSAGE
+_TESTONEOF2.fields_by_name['bar_enum'].enum_type = _TESTONEOF2_NESTEDENUM
+_TESTONEOF2_NESTEDENUM.containing_type = _TESTONEOF2
+_TESTONEOF2.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF2.fields_by_name['foo_int'])
+_TESTONEOF2.fields_by_name['foo_int'].containing_oneof = _TESTONEOF2.oneofs_by_name['foo']
+_TESTONEOF2.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF2.fields_by_name['foo_string'])
+_TESTONEOF2.fields_by_name['foo_string'].containing_oneof = _TESTONEOF2.oneofs_by_name['foo']
+_TESTONEOF2.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF2.fields_by_name['foo_cord'])
+_TESTONEOF2.fields_by_name['foo_cord'].containing_oneof = _TESTONEOF2.oneofs_by_name['foo']
+_TESTONEOF2.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF2.fields_by_name['foo_string_piece'])
+_TESTONEOF2.fields_by_name['foo_string_piece'].containing_oneof = _TESTONEOF2.oneofs_by_name['foo']
+_TESTONEOF2.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF2.fields_by_name['foo_bytes'])
+_TESTONEOF2.fields_by_name['foo_bytes'].containing_oneof = _TESTONEOF2.oneofs_by_name['foo']
+_TESTONEOF2.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF2.fields_by_name['foo_enum'])
+_TESTONEOF2.fields_by_name['foo_enum'].containing_oneof = _TESTONEOF2.oneofs_by_name['foo']
+_TESTONEOF2.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF2.fields_by_name['foo_message'])
+_TESTONEOF2.fields_by_name['foo_message'].containing_oneof = _TESTONEOF2.oneofs_by_name['foo']
+_TESTONEOF2.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF2.fields_by_name['foogroup'])
+_TESTONEOF2.fields_by_name['foogroup'].containing_oneof = _TESTONEOF2.oneofs_by_name['foo']
+_TESTONEOF2.oneofs_by_name['foo'].fields.append(
+  _TESTONEOF2.fields_by_name['foo_lazy_message'])
+_TESTONEOF2.fields_by_name['foo_lazy_message'].containing_oneof = _TESTONEOF2.oneofs_by_name['foo']
+_TESTONEOF2.oneofs_by_name['bar'].fields.append(
+  _TESTONEOF2.fields_by_name['bar_int'])
+_TESTONEOF2.fields_by_name['bar_int'].containing_oneof = _TESTONEOF2.oneofs_by_name['bar']
+_TESTONEOF2.oneofs_by_name['bar'].fields.append(
+  _TESTONEOF2.fields_by_name['bar_string'])
+_TESTONEOF2.fields_by_name['bar_string'].containing_oneof = _TESTONEOF2.oneofs_by_name['bar']
+_TESTONEOF2.oneofs_by_name['bar'].fields.append(
+  _TESTONEOF2.fields_by_name['bar_cord'])
+_TESTONEOF2.fields_by_name['bar_cord'].containing_oneof = _TESTONEOF2.oneofs_by_name['bar']
+_TESTONEOF2.oneofs_by_name['bar'].fields.append(
+  _TESTONEOF2.fields_by_name['bar_string_piece'])
+_TESTONEOF2.fields_by_name['bar_string_piece'].containing_oneof = _TESTONEOF2.oneofs_by_name['bar']
+_TESTONEOF2.oneofs_by_name['bar'].fields.append(
+  _TESTONEOF2.fields_by_name['bar_bytes'])
+_TESTONEOF2.fields_by_name['bar_bytes'].containing_oneof = _TESTONEOF2.oneofs_by_name['bar']
+_TESTONEOF2.oneofs_by_name['bar'].fields.append(
+  _TESTONEOF2.fields_by_name['bar_enum'])
+_TESTONEOF2.fields_by_name['bar_enum'].containing_oneof = _TESTONEOF2.oneofs_by_name['bar']
+_TESTREQUIREDONEOF_NESTEDMESSAGE.containing_type = _TESTREQUIREDONEOF
+_TESTREQUIREDONEOF.fields_by_name['foo_message'].message_type = _TESTREQUIREDONEOF_NESTEDMESSAGE
+_TESTREQUIREDONEOF.oneofs_by_name['foo'].fields.append(
+  _TESTREQUIREDONEOF.fields_by_name['foo_int'])
+_TESTREQUIREDONEOF.fields_by_name['foo_int'].containing_oneof = _TESTREQUIREDONEOF.oneofs_by_name['foo']
+_TESTREQUIREDONEOF.oneofs_by_name['foo'].fields.append(
+  _TESTREQUIREDONEOF.fields_by_name['foo_string'])
+_TESTREQUIREDONEOF.fields_by_name['foo_string'].containing_oneof = _TESTREQUIREDONEOF.oneofs_by_name['foo']
+_TESTREQUIREDONEOF.oneofs_by_name['foo'].fields.append(
+  _TESTREQUIREDONEOF.fields_by_name['foo_message'])
+_TESTREQUIREDONEOF.fields_by_name['foo_message'].containing_oneof = _TESTREQUIREDONEOF.oneofs_by_name['foo']
+_TESTPACKEDTYPES.fields_by_name['packed_enum'].enum_type = _FOREIGNENUM
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_enum'].enum_type = _FOREIGNENUM
+_TESTDYNAMICEXTENSIONS_DYNAMICMESSAGETYPE.containing_type = _TESTDYNAMICEXTENSIONS
+_TESTDYNAMICEXTENSIONS.fields_by_name['enum_extension'].enum_type = _FOREIGNENUM
+_TESTDYNAMICEXTENSIONS.fields_by_name['dynamic_enum_extension'].enum_type = _TESTDYNAMICEXTENSIONS_DYNAMICENUMTYPE
+_TESTDYNAMICEXTENSIONS.fields_by_name['message_extension'].message_type = _FOREIGNMESSAGE
+_TESTDYNAMICEXTENSIONS.fields_by_name['dynamic_message_extension'].message_type = _TESTDYNAMICEXTENSIONS_DYNAMICMESSAGETYPE
+_TESTDYNAMICEXTENSIONS_DYNAMICENUMTYPE.containing_type = _TESTDYNAMICEXTENSIONS
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP1.fields_by_name['field1'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP1.containing_type = _TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP2.fields_by_name['field1'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP2.containing_type = _TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR.fields_by_name['field1'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR.fields_by_name['field2'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR.fields_by_name['field3'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR.fields_by_name['group1'].message_type = _TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP1
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR.fields_by_name['group2'].message_type = _TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP2
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR.fields_by_name['ext1'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR.fields_by_name['ext2'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR.containing_type = _TESTPARSINGMERGE
+_TESTPARSINGMERGE_OPTIONALGROUP.fields_by_name['optional_group_all_types'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE_OPTIONALGROUP.containing_type = _TESTPARSINGMERGE
+_TESTPARSINGMERGE_REPEATEDGROUP.fields_by_name['repeated_group_all_types'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE_REPEATEDGROUP.containing_type = _TESTPARSINGMERGE
+_TESTPARSINGMERGE.fields_by_name['required_all_types'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE.fields_by_name['optional_all_types'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE.fields_by_name['repeated_all_types'].message_type = _TESTALLTYPES
+_TESTPARSINGMERGE.fields_by_name['optionalgroup'].message_type = _TESTPARSINGMERGE_OPTIONALGROUP
+_TESTPARSINGMERGE.fields_by_name['repeatedgroup'].message_type = _TESTPARSINGMERGE_REPEATEDGROUP
+_TESTHUGEFIELDNUMBERS_OPTIONALGROUP.containing_type = _TESTHUGEFIELDNUMBERS
+_TESTHUGEFIELDNUMBERS_STRINGSTRINGMAPENTRY.containing_type = _TESTHUGEFIELDNUMBERS
+_TESTHUGEFIELDNUMBERS.fields_by_name['optional_enum'].enum_type = _FOREIGNENUM
+_TESTHUGEFIELDNUMBERS.fields_by_name['optional_message'].message_type = _FOREIGNMESSAGE
+_TESTHUGEFIELDNUMBERS.fields_by_name['optionalgroup'].message_type = _TESTHUGEFIELDNUMBERS_OPTIONALGROUP
+_TESTHUGEFIELDNUMBERS.fields_by_name['string_string_map'].message_type = _TESTHUGEFIELDNUMBERS_STRINGSTRINGMAPENTRY
+_TESTHUGEFIELDNUMBERS.fields_by_name['oneof_test_all_types'].message_type = _TESTALLTYPES
+_TESTHUGEFIELDNUMBERS.oneofs_by_name['oneof_field'].fields.append(
+  _TESTHUGEFIELDNUMBERS.fields_by_name['oneof_uint32'])
+_TESTHUGEFIELDNUMBERS.fields_by_name['oneof_uint32'].containing_oneof = _TESTHUGEFIELDNUMBERS.oneofs_by_name['oneof_field']
+_TESTHUGEFIELDNUMBERS.oneofs_by_name['oneof_field'].fields.append(
+  _TESTHUGEFIELDNUMBERS.fields_by_name['oneof_test_all_types'])
+_TESTHUGEFIELDNUMBERS.fields_by_name['oneof_test_all_types'].containing_oneof = _TESTHUGEFIELDNUMBERS.oneofs_by_name['oneof_field']
+_TESTHUGEFIELDNUMBERS.oneofs_by_name['oneof_field'].fields.append(
+  _TESTHUGEFIELDNUMBERS.fields_by_name['oneof_string'])
+_TESTHUGEFIELDNUMBERS.fields_by_name['oneof_string'].containing_oneof = _TESTHUGEFIELDNUMBERS.oneofs_by_name['oneof_field']
+_TESTHUGEFIELDNUMBERS.oneofs_by_name['oneof_field'].fields.append(
+  _TESTHUGEFIELDNUMBERS.fields_by_name['oneof_bytes'])
+_TESTHUGEFIELDNUMBERS.fields_by_name['oneof_bytes'].containing_oneof = _TESTHUGEFIELDNUMBERS.oneofs_by_name['oneof_field']
+DESCRIPTOR.message_types_by_name['TestAllTypes'] = _TESTALLTYPES
+DESCRIPTOR.message_types_by_name['NestedTestAllTypes'] = _NESTEDTESTALLTYPES
+DESCRIPTOR.message_types_by_name['TestDeprecatedFields'] = _TESTDEPRECATEDFIELDS
+DESCRIPTOR.message_types_by_name['TestDeprecatedMessage'] = _TESTDEPRECATEDMESSAGE
+DESCRIPTOR.message_types_by_name['ForeignMessage'] = _FOREIGNMESSAGE
+DESCRIPTOR.message_types_by_name['TestReservedFields'] = _TESTRESERVEDFIELDS
+DESCRIPTOR.message_types_by_name['TestAllExtensions'] = _TESTALLEXTENSIONS
+DESCRIPTOR.message_types_by_name['OptionalGroup_extension'] = _OPTIONALGROUP_EXTENSION
+DESCRIPTOR.message_types_by_name['RepeatedGroup_extension'] = _REPEATEDGROUP_EXTENSION
+DESCRIPTOR.message_types_by_name['TestGroup'] = _TESTGROUP
+DESCRIPTOR.message_types_by_name['TestGroupExtension'] = _TESTGROUPEXTENSION
+DESCRIPTOR.message_types_by_name['TestNestedExtension'] = _TESTNESTEDEXTENSION
+DESCRIPTOR.message_types_by_name['TestRequired'] = _TESTREQUIRED
+DESCRIPTOR.message_types_by_name['TestRequiredForeign'] = _TESTREQUIREDFOREIGN
+DESCRIPTOR.message_types_by_name['TestRequiredMessage'] = _TESTREQUIREDMESSAGE
+DESCRIPTOR.message_types_by_name['TestForeignNested'] = _TESTFOREIGNNESTED
+DESCRIPTOR.message_types_by_name['TestEmptyMessage'] = _TESTEMPTYMESSAGE
+DESCRIPTOR.message_types_by_name['TestEmptyMessageWithExtensions'] = _TESTEMPTYMESSAGEWITHEXTENSIONS
+DESCRIPTOR.message_types_by_name['TestPickleNestedMessage'] = _TESTPICKLENESTEDMESSAGE
+DESCRIPTOR.message_types_by_name['TestMultipleExtensionRanges'] = _TESTMULTIPLEEXTENSIONRANGES
+DESCRIPTOR.message_types_by_name['TestReallyLargeTagNumber'] = _TESTREALLYLARGETAGNUMBER
+DESCRIPTOR.message_types_by_name['TestRecursiveMessage'] = _TESTRECURSIVEMESSAGE
+DESCRIPTOR.message_types_by_name['TestMutualRecursionA'] = _TESTMUTUALRECURSIONA
+DESCRIPTOR.message_types_by_name['TestMutualRecursionB'] = _TESTMUTUALRECURSIONB
+DESCRIPTOR.message_types_by_name['TestIsInitialized'] = _TESTISINITIALIZED
+DESCRIPTOR.message_types_by_name['TestDupFieldNumber'] = _TESTDUPFIELDNUMBER
+DESCRIPTOR.message_types_by_name['TestEagerMessage'] = _TESTEAGERMESSAGE
+DESCRIPTOR.message_types_by_name['TestLazyMessage'] = _TESTLAZYMESSAGE
+DESCRIPTOR.message_types_by_name['TestNestedMessageHasBits'] = _TESTNESTEDMESSAGEHASBITS
+DESCRIPTOR.message_types_by_name['TestCamelCaseFieldNames'] = _TESTCAMELCASEFIELDNAMES
+DESCRIPTOR.message_types_by_name['TestFieldOrderings'] = _TESTFIELDORDERINGS
+DESCRIPTOR.message_types_by_name['TestExtensionOrderings1'] = _TESTEXTENSIONORDERINGS1
+DESCRIPTOR.message_types_by_name['TestExtensionOrderings2'] = _TESTEXTENSIONORDERINGS2
+DESCRIPTOR.message_types_by_name['TestExtremeDefaultValues'] = _TESTEXTREMEDEFAULTVALUES
+DESCRIPTOR.message_types_by_name['SparseEnumMessage'] = _SPARSEENUMMESSAGE
+DESCRIPTOR.message_types_by_name['OneString'] = _ONESTRING
+DESCRIPTOR.message_types_by_name['MoreString'] = _MORESTRING
+DESCRIPTOR.message_types_by_name['OneBytes'] = _ONEBYTES
+DESCRIPTOR.message_types_by_name['MoreBytes'] = _MOREBYTES
+DESCRIPTOR.message_types_by_name['Int32Message'] = _INT32MESSAGE
+DESCRIPTOR.message_types_by_name['Uint32Message'] = _UINT32MESSAGE
+DESCRIPTOR.message_types_by_name['Int64Message'] = _INT64MESSAGE
+DESCRIPTOR.message_types_by_name['Uint64Message'] = _UINT64MESSAGE
+DESCRIPTOR.message_types_by_name['BoolMessage'] = _BOOLMESSAGE
+DESCRIPTOR.message_types_by_name['TestOneof'] = _TESTONEOF
+DESCRIPTOR.message_types_by_name['TestOneofBackwardsCompatible'] = _TESTONEOFBACKWARDSCOMPATIBLE
+DESCRIPTOR.message_types_by_name['TestOneof2'] = _TESTONEOF2
+DESCRIPTOR.message_types_by_name['TestRequiredOneof'] = _TESTREQUIREDONEOF
+DESCRIPTOR.message_types_by_name['TestPackedTypes'] = _TESTPACKEDTYPES
+DESCRIPTOR.message_types_by_name['TestUnpackedTypes'] = _TESTUNPACKEDTYPES
+DESCRIPTOR.message_types_by_name['TestPackedExtensions'] = _TESTPACKEDEXTENSIONS
+DESCRIPTOR.message_types_by_name['TestUnpackedExtensions'] = _TESTUNPACKEDEXTENSIONS
+DESCRIPTOR.message_types_by_name['TestDynamicExtensions'] = _TESTDYNAMICEXTENSIONS
+DESCRIPTOR.message_types_by_name['TestRepeatedScalarDifferentTagSizes'] = _TESTREPEATEDSCALARDIFFERENTTAGSIZES
+DESCRIPTOR.message_types_by_name['TestParsingMerge'] = _TESTPARSINGMERGE
+DESCRIPTOR.message_types_by_name['TestCommentInjectionMessage'] = _TESTCOMMENTINJECTIONMESSAGE
+DESCRIPTOR.message_types_by_name['FooRequest'] = _FOOREQUEST
+DESCRIPTOR.message_types_by_name['FooResponse'] = _FOORESPONSE
+DESCRIPTOR.message_types_by_name['FooClientMessage'] = _FOOCLIENTMESSAGE
+DESCRIPTOR.message_types_by_name['FooServerMessage'] = _FOOSERVERMESSAGE
+DESCRIPTOR.message_types_by_name['BarRequest'] = _BARREQUEST
+DESCRIPTOR.message_types_by_name['BarResponse'] = _BARRESPONSE
+DESCRIPTOR.message_types_by_name['TestJsonName'] = _TESTJSONNAME
+DESCRIPTOR.message_types_by_name['TestHugeFieldNumbers'] = _TESTHUGEFIELDNUMBERS
+DESCRIPTOR.message_types_by_name['TestExtensionInsideTable'] = _TESTEXTENSIONINSIDETABLE
+DESCRIPTOR.enum_types_by_name['ForeignEnum'] = _FOREIGNENUM
+DESCRIPTOR.enum_types_by_name['TestEnumWithDupValue'] = _TESTENUMWITHDUPVALUE
+DESCRIPTOR.enum_types_by_name['TestSparseEnum'] = _TESTSPARSEENUM
+DESCRIPTOR.enum_types_by_name['VeryLargeEnum'] = _VERYLARGEENUM
+DESCRIPTOR.extensions_by_name['optional_int32_extension'] = optional_int32_extension
+DESCRIPTOR.extensions_by_name['optional_int64_extension'] = optional_int64_extension
+DESCRIPTOR.extensions_by_name['optional_uint32_extension'] = optional_uint32_extension
+DESCRIPTOR.extensions_by_name['optional_uint64_extension'] = optional_uint64_extension
+DESCRIPTOR.extensions_by_name['optional_sint32_extension'] = optional_sint32_extension
+DESCRIPTOR.extensions_by_name['optional_sint64_extension'] = optional_sint64_extension
+DESCRIPTOR.extensions_by_name['optional_fixed32_extension'] = optional_fixed32_extension
+DESCRIPTOR.extensions_by_name['optional_fixed64_extension'] = optional_fixed64_extension
+DESCRIPTOR.extensions_by_name['optional_sfixed32_extension'] = optional_sfixed32_extension
+DESCRIPTOR.extensions_by_name['optional_sfixed64_extension'] = optional_sfixed64_extension
+DESCRIPTOR.extensions_by_name['optional_float_extension'] = optional_float_extension
+DESCRIPTOR.extensions_by_name['optional_double_extension'] = optional_double_extension
+DESCRIPTOR.extensions_by_name['optional_bool_extension'] = optional_bool_extension
+DESCRIPTOR.extensions_by_name['optional_string_extension'] = optional_string_extension
+DESCRIPTOR.extensions_by_name['optional_bytes_extension'] = optional_bytes_extension
+DESCRIPTOR.extensions_by_name['optionalgroup_extension'] = optionalgroup_extension
+DESCRIPTOR.extensions_by_name['optional_nested_message_extension'] = optional_nested_message_extension
+DESCRIPTOR.extensions_by_name['optional_foreign_message_extension'] = optional_foreign_message_extension
+DESCRIPTOR.extensions_by_name['optional_import_message_extension'] = optional_import_message_extension
+DESCRIPTOR.extensions_by_name['optional_nested_enum_extension'] = optional_nested_enum_extension
+DESCRIPTOR.extensions_by_name['optional_foreign_enum_extension'] = optional_foreign_enum_extension
+DESCRIPTOR.extensions_by_name['optional_import_enum_extension'] = optional_import_enum_extension
+DESCRIPTOR.extensions_by_name['optional_string_piece_extension'] = optional_string_piece_extension
+DESCRIPTOR.extensions_by_name['optional_cord_extension'] = optional_cord_extension
+DESCRIPTOR.extensions_by_name['optional_public_import_message_extension'] = optional_public_import_message_extension
+DESCRIPTOR.extensions_by_name['optional_lazy_message_extension'] = optional_lazy_message_extension
+DESCRIPTOR.extensions_by_name['repeated_int32_extension'] = repeated_int32_extension
+DESCRIPTOR.extensions_by_name['repeated_int64_extension'] = repeated_int64_extension
+DESCRIPTOR.extensions_by_name['repeated_uint32_extension'] = repeated_uint32_extension
+DESCRIPTOR.extensions_by_name['repeated_uint64_extension'] = repeated_uint64_extension
+DESCRIPTOR.extensions_by_name['repeated_sint32_extension'] = repeated_sint32_extension
+DESCRIPTOR.extensions_by_name['repeated_sint64_extension'] = repeated_sint64_extension
+DESCRIPTOR.extensions_by_name['repeated_fixed32_extension'] = repeated_fixed32_extension
+DESCRIPTOR.extensions_by_name['repeated_fixed64_extension'] = repeated_fixed64_extension
+DESCRIPTOR.extensions_by_name['repeated_sfixed32_extension'] = repeated_sfixed32_extension
+DESCRIPTOR.extensions_by_name['repeated_sfixed64_extension'] = repeated_sfixed64_extension
+DESCRIPTOR.extensions_by_name['repeated_float_extension'] = repeated_float_extension
+DESCRIPTOR.extensions_by_name['repeated_double_extension'] = repeated_double_extension
+DESCRIPTOR.extensions_by_name['repeated_bool_extension'] = repeated_bool_extension
+DESCRIPTOR.extensions_by_name['repeated_string_extension'] = repeated_string_extension
+DESCRIPTOR.extensions_by_name['repeated_bytes_extension'] = repeated_bytes_extension
+DESCRIPTOR.extensions_by_name['repeatedgroup_extension'] = repeatedgroup_extension
+DESCRIPTOR.extensions_by_name['repeated_nested_message_extension'] = repeated_nested_message_extension
+DESCRIPTOR.extensions_by_name['repeated_foreign_message_extension'] = repeated_foreign_message_extension
+DESCRIPTOR.extensions_by_name['repeated_import_message_extension'] = repeated_import_message_extension
+DESCRIPTOR.extensions_by_name['repeated_nested_enum_extension'] = repeated_nested_enum_extension
+DESCRIPTOR.extensions_by_name['repeated_foreign_enum_extension'] = repeated_foreign_enum_extension
+DESCRIPTOR.extensions_by_name['repeated_import_enum_extension'] = repeated_import_enum_extension
+DESCRIPTOR.extensions_by_name['repeated_string_piece_extension'] = repeated_string_piece_extension
+DESCRIPTOR.extensions_by_name['repeated_cord_extension'] = repeated_cord_extension
+DESCRIPTOR.extensions_by_name['repeated_lazy_message_extension'] = repeated_lazy_message_extension
+DESCRIPTOR.extensions_by_name['default_int32_extension'] = default_int32_extension
+DESCRIPTOR.extensions_by_name['default_int64_extension'] = default_int64_extension
+DESCRIPTOR.extensions_by_name['default_uint32_extension'] = default_uint32_extension
+DESCRIPTOR.extensions_by_name['default_uint64_extension'] = default_uint64_extension
+DESCRIPTOR.extensions_by_name['default_sint32_extension'] = default_sint32_extension
+DESCRIPTOR.extensions_by_name['default_sint64_extension'] = default_sint64_extension
+DESCRIPTOR.extensions_by_name['default_fixed32_extension'] = default_fixed32_extension
+DESCRIPTOR.extensions_by_name['default_fixed64_extension'] = default_fixed64_extension
+DESCRIPTOR.extensions_by_name['default_sfixed32_extension'] = default_sfixed32_extension
+DESCRIPTOR.extensions_by_name['default_sfixed64_extension'] = default_sfixed64_extension
+DESCRIPTOR.extensions_by_name['default_float_extension'] = default_float_extension
+DESCRIPTOR.extensions_by_name['default_double_extension'] = default_double_extension
+DESCRIPTOR.extensions_by_name['default_bool_extension'] = default_bool_extension
+DESCRIPTOR.extensions_by_name['default_string_extension'] = default_string_extension
+DESCRIPTOR.extensions_by_name['default_bytes_extension'] = default_bytes_extension
+DESCRIPTOR.extensions_by_name['default_nested_enum_extension'] = default_nested_enum_extension
+DESCRIPTOR.extensions_by_name['default_foreign_enum_extension'] = default_foreign_enum_extension
+DESCRIPTOR.extensions_by_name['default_import_enum_extension'] = default_import_enum_extension
+DESCRIPTOR.extensions_by_name['default_string_piece_extension'] = default_string_piece_extension
+DESCRIPTOR.extensions_by_name['default_cord_extension'] = default_cord_extension
+DESCRIPTOR.extensions_by_name['oneof_uint32_extension'] = oneof_uint32_extension
+DESCRIPTOR.extensions_by_name['oneof_nested_message_extension'] = oneof_nested_message_extension
+DESCRIPTOR.extensions_by_name['oneof_string_extension'] = oneof_string_extension
+DESCRIPTOR.extensions_by_name['oneof_bytes_extension'] = oneof_bytes_extension
+DESCRIPTOR.extensions_by_name['my_extension_string'] = my_extension_string
+DESCRIPTOR.extensions_by_name['my_extension_int'] = my_extension_int
+DESCRIPTOR.extensions_by_name['packed_int32_extension'] = packed_int32_extension
+DESCRIPTOR.extensions_by_name['packed_int64_extension'] = packed_int64_extension
+DESCRIPTOR.extensions_by_name['packed_uint32_extension'] = packed_uint32_extension
+DESCRIPTOR.extensions_by_name['packed_uint64_extension'] = packed_uint64_extension
+DESCRIPTOR.extensions_by_name['packed_sint32_extension'] = packed_sint32_extension
+DESCRIPTOR.extensions_by_name['packed_sint64_extension'] = packed_sint64_extension
+DESCRIPTOR.extensions_by_name['packed_fixed32_extension'] = packed_fixed32_extension
+DESCRIPTOR.extensions_by_name['packed_fixed64_extension'] = packed_fixed64_extension
+DESCRIPTOR.extensions_by_name['packed_sfixed32_extension'] = packed_sfixed32_extension
+DESCRIPTOR.extensions_by_name['packed_sfixed64_extension'] = packed_sfixed64_extension
+DESCRIPTOR.extensions_by_name['packed_float_extension'] = packed_float_extension
+DESCRIPTOR.extensions_by_name['packed_double_extension'] = packed_double_extension
+DESCRIPTOR.extensions_by_name['packed_bool_extension'] = packed_bool_extension
+DESCRIPTOR.extensions_by_name['packed_enum_extension'] = packed_enum_extension
+DESCRIPTOR.extensions_by_name['unpacked_int32_extension'] = unpacked_int32_extension
+DESCRIPTOR.extensions_by_name['unpacked_int64_extension'] = unpacked_int64_extension
+DESCRIPTOR.extensions_by_name['unpacked_uint32_extension'] = unpacked_uint32_extension
+DESCRIPTOR.extensions_by_name['unpacked_uint64_extension'] = unpacked_uint64_extension
+DESCRIPTOR.extensions_by_name['unpacked_sint32_extension'] = unpacked_sint32_extension
+DESCRIPTOR.extensions_by_name['unpacked_sint64_extension'] = unpacked_sint64_extension
+DESCRIPTOR.extensions_by_name['unpacked_fixed32_extension'] = unpacked_fixed32_extension
+DESCRIPTOR.extensions_by_name['unpacked_fixed64_extension'] = unpacked_fixed64_extension
+DESCRIPTOR.extensions_by_name['unpacked_sfixed32_extension'] = unpacked_sfixed32_extension
+DESCRIPTOR.extensions_by_name['unpacked_sfixed64_extension'] = unpacked_sfixed64_extension
+DESCRIPTOR.extensions_by_name['unpacked_float_extension'] = unpacked_float_extension
+DESCRIPTOR.extensions_by_name['unpacked_double_extension'] = unpacked_double_extension
+DESCRIPTOR.extensions_by_name['unpacked_bool_extension'] = unpacked_bool_extension
+DESCRIPTOR.extensions_by_name['unpacked_enum_extension'] = unpacked_enum_extension
+DESCRIPTOR.extensions_by_name['test_all_types'] = test_all_types
+DESCRIPTOR.extensions_by_name['test_extension_inside_table_extension'] = test_extension_inside_table_extension
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestAllTypes = _reflection.GeneratedProtocolMessageType('TestAllTypes', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPES_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestAllTypes.NestedMessage)
+    })
+  ,
+
+  'OptionalGroup' : _reflection.GeneratedProtocolMessageType('OptionalGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPES_OPTIONALGROUP,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestAllTypes.OptionalGroup)
+    })
+  ,
+
+  'RepeatedGroup' : _reflection.GeneratedProtocolMessageType('RepeatedGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPES_REPEATEDGROUP,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestAllTypes.RepeatedGroup)
+    })
+  ,
+  'DESCRIPTOR' : _TESTALLTYPES,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestAllTypes)
+  })
+_sym_db.RegisterMessage(TestAllTypes)
+_sym_db.RegisterMessage(TestAllTypes.NestedMessage)
+_sym_db.RegisterMessage(TestAllTypes.OptionalGroup)
+_sym_db.RegisterMessage(TestAllTypes.RepeatedGroup)
+
+NestedTestAllTypes = _reflection.GeneratedProtocolMessageType('NestedTestAllTypes', (_message.Message,), {
+  'DESCRIPTOR' : _NESTEDTESTALLTYPES,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.NestedTestAllTypes)
+  })
+_sym_db.RegisterMessage(NestedTestAllTypes)
+
+TestDeprecatedFields = _reflection.GeneratedProtocolMessageType('TestDeprecatedFields', (_message.Message,), {
+  'DESCRIPTOR' : _TESTDEPRECATEDFIELDS,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestDeprecatedFields)
+  })
+_sym_db.RegisterMessage(TestDeprecatedFields)
+
+TestDeprecatedMessage = _reflection.GeneratedProtocolMessageType('TestDeprecatedMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTDEPRECATEDMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestDeprecatedMessage)
+  })
+_sym_db.RegisterMessage(TestDeprecatedMessage)
+
+ForeignMessage = _reflection.GeneratedProtocolMessageType('ForeignMessage', (_message.Message,), {
+  'DESCRIPTOR' : _FOREIGNMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.ForeignMessage)
+  })
+_sym_db.RegisterMessage(ForeignMessage)
+
+TestReservedFields = _reflection.GeneratedProtocolMessageType('TestReservedFields', (_message.Message,), {
+  'DESCRIPTOR' : _TESTRESERVEDFIELDS,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestReservedFields)
+  })
+_sym_db.RegisterMessage(TestReservedFields)
+
+TestAllExtensions = _reflection.GeneratedProtocolMessageType('TestAllExtensions', (_message.Message,), {
+  'DESCRIPTOR' : _TESTALLEXTENSIONS,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestAllExtensions)
+  })
+_sym_db.RegisterMessage(TestAllExtensions)
+
+OptionalGroup_extension = _reflection.GeneratedProtocolMessageType('OptionalGroup_extension', (_message.Message,), {
+  'DESCRIPTOR' : _OPTIONALGROUP_EXTENSION,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.OptionalGroup_extension)
+  })
+_sym_db.RegisterMessage(OptionalGroup_extension)
+
+RepeatedGroup_extension = _reflection.GeneratedProtocolMessageType('RepeatedGroup_extension', (_message.Message,), {
+  'DESCRIPTOR' : _REPEATEDGROUP_EXTENSION,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.RepeatedGroup_extension)
+  })
+_sym_db.RegisterMessage(RepeatedGroup_extension)
+
+TestGroup = _reflection.GeneratedProtocolMessageType('TestGroup', (_message.Message,), {
+
+  'OptionalGroup' : _reflection.GeneratedProtocolMessageType('OptionalGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTGROUP_OPTIONALGROUP,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestGroup.OptionalGroup)
+    })
+  ,
+  'DESCRIPTOR' : _TESTGROUP,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestGroup)
+  })
+_sym_db.RegisterMessage(TestGroup)
+_sym_db.RegisterMessage(TestGroup.OptionalGroup)
+
+TestGroupExtension = _reflection.GeneratedProtocolMessageType('TestGroupExtension', (_message.Message,), {
+  'DESCRIPTOR' : _TESTGROUPEXTENSION,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestGroupExtension)
+  })
+_sym_db.RegisterMessage(TestGroupExtension)
+
+TestNestedExtension = _reflection.GeneratedProtocolMessageType('TestNestedExtension', (_message.Message,), {
+
+  'OptionalGroup_extension' : _reflection.GeneratedProtocolMessageType('OptionalGroup_extension', (_message.Message,), {
+    'DESCRIPTOR' : _TESTNESTEDEXTENSION_OPTIONALGROUP_EXTENSION,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestNestedExtension.OptionalGroup_extension)
+    })
+  ,
+  'DESCRIPTOR' : _TESTNESTEDEXTENSION,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestNestedExtension)
+  })
+_sym_db.RegisterMessage(TestNestedExtension)
+_sym_db.RegisterMessage(TestNestedExtension.OptionalGroup_extension)
+
+TestRequired = _reflection.GeneratedProtocolMessageType('TestRequired', (_message.Message,), {
+  'DESCRIPTOR' : _TESTREQUIRED,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRequired)
+  })
+_sym_db.RegisterMessage(TestRequired)
+
+TestRequiredForeign = _reflection.GeneratedProtocolMessageType('TestRequiredForeign', (_message.Message,), {
+  'DESCRIPTOR' : _TESTREQUIREDFOREIGN,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRequiredForeign)
+  })
+_sym_db.RegisterMessage(TestRequiredForeign)
+
+TestRequiredMessage = _reflection.GeneratedProtocolMessageType('TestRequiredMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTREQUIREDMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRequiredMessage)
+  })
+_sym_db.RegisterMessage(TestRequiredMessage)
+
+TestForeignNested = _reflection.GeneratedProtocolMessageType('TestForeignNested', (_message.Message,), {
+  'DESCRIPTOR' : _TESTFOREIGNNESTED,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestForeignNested)
+  })
+_sym_db.RegisterMessage(TestForeignNested)
+
+TestEmptyMessage = _reflection.GeneratedProtocolMessageType('TestEmptyMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTEMPTYMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestEmptyMessage)
+  })
+_sym_db.RegisterMessage(TestEmptyMessage)
+
+TestEmptyMessageWithExtensions = _reflection.GeneratedProtocolMessageType('TestEmptyMessageWithExtensions', (_message.Message,), {
+  'DESCRIPTOR' : _TESTEMPTYMESSAGEWITHEXTENSIONS,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestEmptyMessageWithExtensions)
+  })
+_sym_db.RegisterMessage(TestEmptyMessageWithExtensions)
+
+TestPickleNestedMessage = _reflection.GeneratedProtocolMessageType('TestPickleNestedMessage', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+
+    'NestedNestedMessage' : _reflection.GeneratedProtocolMessageType('NestedNestedMessage', (_message.Message,), {
+      'DESCRIPTOR' : _TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE_NESTEDNESTEDMESSAGE,
+      '__module__' : 'google.protobuf.unittest_pb2'
+      # @@protoc_insertion_point(class_scope:protobuf_unittest.TestPickleNestedMessage.NestedMessage.NestedNestedMessage)
+      })
+    ,
+    'DESCRIPTOR' : _TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestPickleNestedMessage.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _TESTPICKLENESTEDMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestPickleNestedMessage)
+  })
+_sym_db.RegisterMessage(TestPickleNestedMessage)
+_sym_db.RegisterMessage(TestPickleNestedMessage.NestedMessage)
+_sym_db.RegisterMessage(TestPickleNestedMessage.NestedMessage.NestedNestedMessage)
+
+TestMultipleExtensionRanges = _reflection.GeneratedProtocolMessageType('TestMultipleExtensionRanges', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMULTIPLEEXTENSIONRANGES,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMultipleExtensionRanges)
+  })
+_sym_db.RegisterMessage(TestMultipleExtensionRanges)
+
+TestReallyLargeTagNumber = _reflection.GeneratedProtocolMessageType('TestReallyLargeTagNumber', (_message.Message,), {
+  'DESCRIPTOR' : _TESTREALLYLARGETAGNUMBER,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestReallyLargeTagNumber)
+  })
+_sym_db.RegisterMessage(TestReallyLargeTagNumber)
+
+TestRecursiveMessage = _reflection.GeneratedProtocolMessageType('TestRecursiveMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTRECURSIVEMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRecursiveMessage)
+  })
+_sym_db.RegisterMessage(TestRecursiveMessage)
+
+TestMutualRecursionA = _reflection.GeneratedProtocolMessageType('TestMutualRecursionA', (_message.Message,), {
+
+  'SubMessage' : _reflection.GeneratedProtocolMessageType('SubMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMUTUALRECURSIONA_SUBMESSAGE,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMutualRecursionA.SubMessage)
+    })
+  ,
+
+  'SubGroup' : _reflection.GeneratedProtocolMessageType('SubGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMUTUALRECURSIONA_SUBGROUP,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMutualRecursionA.SubGroup)
+    })
+  ,
+  'DESCRIPTOR' : _TESTMUTUALRECURSIONA,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMutualRecursionA)
+  })
+_sym_db.RegisterMessage(TestMutualRecursionA)
+_sym_db.RegisterMessage(TestMutualRecursionA.SubMessage)
+_sym_db.RegisterMessage(TestMutualRecursionA.SubGroup)
+
+TestMutualRecursionB = _reflection.GeneratedProtocolMessageType('TestMutualRecursionB', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMUTUALRECURSIONB,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMutualRecursionB)
+  })
+_sym_db.RegisterMessage(TestMutualRecursionB)
+
+TestIsInitialized = _reflection.GeneratedProtocolMessageType('TestIsInitialized', (_message.Message,), {
+
+  'SubMessage' : _reflection.GeneratedProtocolMessageType('SubMessage', (_message.Message,), {
+
+    'SubGroup' : _reflection.GeneratedProtocolMessageType('SubGroup', (_message.Message,), {
+      'DESCRIPTOR' : _TESTISINITIALIZED_SUBMESSAGE_SUBGROUP,
+      '__module__' : 'google.protobuf.unittest_pb2'
+      # @@protoc_insertion_point(class_scope:protobuf_unittest.TestIsInitialized.SubMessage.SubGroup)
+      })
+    ,
+    'DESCRIPTOR' : _TESTISINITIALIZED_SUBMESSAGE,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestIsInitialized.SubMessage)
+    })
+  ,
+  'DESCRIPTOR' : _TESTISINITIALIZED,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestIsInitialized)
+  })
+_sym_db.RegisterMessage(TestIsInitialized)
+_sym_db.RegisterMessage(TestIsInitialized.SubMessage)
+_sym_db.RegisterMessage(TestIsInitialized.SubMessage.SubGroup)
+
+TestDupFieldNumber = _reflection.GeneratedProtocolMessageType('TestDupFieldNumber', (_message.Message,), {
+
+  'Foo' : _reflection.GeneratedProtocolMessageType('Foo', (_message.Message,), {
+    'DESCRIPTOR' : _TESTDUPFIELDNUMBER_FOO,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestDupFieldNumber.Foo)
+    })
+  ,
+
+  'Bar' : _reflection.GeneratedProtocolMessageType('Bar', (_message.Message,), {
+    'DESCRIPTOR' : _TESTDUPFIELDNUMBER_BAR,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestDupFieldNumber.Bar)
+    })
+  ,
+  'DESCRIPTOR' : _TESTDUPFIELDNUMBER,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestDupFieldNumber)
+  })
+_sym_db.RegisterMessage(TestDupFieldNumber)
+_sym_db.RegisterMessage(TestDupFieldNumber.Foo)
+_sym_db.RegisterMessage(TestDupFieldNumber.Bar)
+
+TestEagerMessage = _reflection.GeneratedProtocolMessageType('TestEagerMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTEAGERMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestEagerMessage)
+  })
+_sym_db.RegisterMessage(TestEagerMessage)
+
+TestLazyMessage = _reflection.GeneratedProtocolMessageType('TestLazyMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTLAZYMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestLazyMessage)
+  })
+_sym_db.RegisterMessage(TestLazyMessage)
+
+TestNestedMessageHasBits = _reflection.GeneratedProtocolMessageType('TestNestedMessageHasBits', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTNESTEDMESSAGEHASBITS_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestNestedMessageHasBits.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _TESTNESTEDMESSAGEHASBITS,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestNestedMessageHasBits)
+  })
+_sym_db.RegisterMessage(TestNestedMessageHasBits)
+_sym_db.RegisterMessage(TestNestedMessageHasBits.NestedMessage)
+
+TestCamelCaseFieldNames = _reflection.GeneratedProtocolMessageType('TestCamelCaseFieldNames', (_message.Message,), {
+  'DESCRIPTOR' : _TESTCAMELCASEFIELDNAMES,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestCamelCaseFieldNames)
+  })
+_sym_db.RegisterMessage(TestCamelCaseFieldNames)
+
+TestFieldOrderings = _reflection.GeneratedProtocolMessageType('TestFieldOrderings', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTFIELDORDERINGS_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestFieldOrderings.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _TESTFIELDORDERINGS,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestFieldOrderings)
+  })
+_sym_db.RegisterMessage(TestFieldOrderings)
+_sym_db.RegisterMessage(TestFieldOrderings.NestedMessage)
+
+TestExtensionOrderings1 = _reflection.GeneratedProtocolMessageType('TestExtensionOrderings1', (_message.Message,), {
+  'DESCRIPTOR' : _TESTEXTENSIONORDERINGS1,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestExtensionOrderings1)
+  })
+_sym_db.RegisterMessage(TestExtensionOrderings1)
+
+TestExtensionOrderings2 = _reflection.GeneratedProtocolMessageType('TestExtensionOrderings2', (_message.Message,), {
+
+  'TestExtensionOrderings3' : _reflection.GeneratedProtocolMessageType('TestExtensionOrderings3', (_message.Message,), {
+    'DESCRIPTOR' : _TESTEXTENSIONORDERINGS2_TESTEXTENSIONORDERINGS3,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestExtensionOrderings2.TestExtensionOrderings3)
+    })
+  ,
+  'DESCRIPTOR' : _TESTEXTENSIONORDERINGS2,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestExtensionOrderings2)
+  })
+_sym_db.RegisterMessage(TestExtensionOrderings2)
+_sym_db.RegisterMessage(TestExtensionOrderings2.TestExtensionOrderings3)
+
+TestExtremeDefaultValues = _reflection.GeneratedProtocolMessageType('TestExtremeDefaultValues', (_message.Message,), {
+  'DESCRIPTOR' : _TESTEXTREMEDEFAULTVALUES,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestExtremeDefaultValues)
+  })
+_sym_db.RegisterMessage(TestExtremeDefaultValues)
+
+SparseEnumMessage = _reflection.GeneratedProtocolMessageType('SparseEnumMessage', (_message.Message,), {
+  'DESCRIPTOR' : _SPARSEENUMMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.SparseEnumMessage)
+  })
+_sym_db.RegisterMessage(SparseEnumMessage)
+
+OneString = _reflection.GeneratedProtocolMessageType('OneString', (_message.Message,), {
+  'DESCRIPTOR' : _ONESTRING,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.OneString)
+  })
+_sym_db.RegisterMessage(OneString)
+
+MoreString = _reflection.GeneratedProtocolMessageType('MoreString', (_message.Message,), {
+  'DESCRIPTOR' : _MORESTRING,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.MoreString)
+  })
+_sym_db.RegisterMessage(MoreString)
+
+OneBytes = _reflection.GeneratedProtocolMessageType('OneBytes', (_message.Message,), {
+  'DESCRIPTOR' : _ONEBYTES,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.OneBytes)
+  })
+_sym_db.RegisterMessage(OneBytes)
+
+MoreBytes = _reflection.GeneratedProtocolMessageType('MoreBytes', (_message.Message,), {
+  'DESCRIPTOR' : _MOREBYTES,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.MoreBytes)
+  })
+_sym_db.RegisterMessage(MoreBytes)
+
+Int32Message = _reflection.GeneratedProtocolMessageType('Int32Message', (_message.Message,), {
+  'DESCRIPTOR' : _INT32MESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.Int32Message)
+  })
+_sym_db.RegisterMessage(Int32Message)
+
+Uint32Message = _reflection.GeneratedProtocolMessageType('Uint32Message', (_message.Message,), {
+  'DESCRIPTOR' : _UINT32MESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.Uint32Message)
+  })
+_sym_db.RegisterMessage(Uint32Message)
+
+Int64Message = _reflection.GeneratedProtocolMessageType('Int64Message', (_message.Message,), {
+  'DESCRIPTOR' : _INT64MESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.Int64Message)
+  })
+_sym_db.RegisterMessage(Int64Message)
+
+Uint64Message = _reflection.GeneratedProtocolMessageType('Uint64Message', (_message.Message,), {
+  'DESCRIPTOR' : _UINT64MESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.Uint64Message)
+  })
+_sym_db.RegisterMessage(Uint64Message)
+
+BoolMessage = _reflection.GeneratedProtocolMessageType('BoolMessage', (_message.Message,), {
+  'DESCRIPTOR' : _BOOLMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.BoolMessage)
+  })
+_sym_db.RegisterMessage(BoolMessage)
+
+TestOneof = _reflection.GeneratedProtocolMessageType('TestOneof', (_message.Message,), {
+
+  'FooGroup' : _reflection.GeneratedProtocolMessageType('FooGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTONEOF_FOOGROUP,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestOneof.FooGroup)
+    })
+  ,
+  'DESCRIPTOR' : _TESTONEOF,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestOneof)
+  })
+_sym_db.RegisterMessage(TestOneof)
+_sym_db.RegisterMessage(TestOneof.FooGroup)
+
+TestOneofBackwardsCompatible = _reflection.GeneratedProtocolMessageType('TestOneofBackwardsCompatible', (_message.Message,), {
+
+  'FooGroup' : _reflection.GeneratedProtocolMessageType('FooGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTONEOFBACKWARDSCOMPATIBLE_FOOGROUP,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestOneofBackwardsCompatible.FooGroup)
+    })
+  ,
+  'DESCRIPTOR' : _TESTONEOFBACKWARDSCOMPATIBLE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestOneofBackwardsCompatible)
+  })
+_sym_db.RegisterMessage(TestOneofBackwardsCompatible)
+_sym_db.RegisterMessage(TestOneofBackwardsCompatible.FooGroup)
+
+TestOneof2 = _reflection.GeneratedProtocolMessageType('TestOneof2', (_message.Message,), {
+
+  'FooGroup' : _reflection.GeneratedProtocolMessageType('FooGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTONEOF2_FOOGROUP,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestOneof2.FooGroup)
+    })
+  ,
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTONEOF2_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestOneof2.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _TESTONEOF2,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestOneof2)
+  })
+_sym_db.RegisterMessage(TestOneof2)
+_sym_db.RegisterMessage(TestOneof2.FooGroup)
+_sym_db.RegisterMessage(TestOneof2.NestedMessage)
+
+TestRequiredOneof = _reflection.GeneratedProtocolMessageType('TestRequiredOneof', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTREQUIREDONEOF_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRequiredOneof.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _TESTREQUIREDONEOF,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRequiredOneof)
+  })
+_sym_db.RegisterMessage(TestRequiredOneof)
+_sym_db.RegisterMessage(TestRequiredOneof.NestedMessage)
+
+TestPackedTypes = _reflection.GeneratedProtocolMessageType('TestPackedTypes', (_message.Message,), {
+  'DESCRIPTOR' : _TESTPACKEDTYPES,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestPackedTypes)
+  })
+_sym_db.RegisterMessage(TestPackedTypes)
+
+TestUnpackedTypes = _reflection.GeneratedProtocolMessageType('TestUnpackedTypes', (_message.Message,), {
+  'DESCRIPTOR' : _TESTUNPACKEDTYPES,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestUnpackedTypes)
+  })
+_sym_db.RegisterMessage(TestUnpackedTypes)
+
+TestPackedExtensions = _reflection.GeneratedProtocolMessageType('TestPackedExtensions', (_message.Message,), {
+  'DESCRIPTOR' : _TESTPACKEDEXTENSIONS,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestPackedExtensions)
+  })
+_sym_db.RegisterMessage(TestPackedExtensions)
+
+TestUnpackedExtensions = _reflection.GeneratedProtocolMessageType('TestUnpackedExtensions', (_message.Message,), {
+  'DESCRIPTOR' : _TESTUNPACKEDEXTENSIONS,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestUnpackedExtensions)
+  })
+_sym_db.RegisterMessage(TestUnpackedExtensions)
+
+TestDynamicExtensions = _reflection.GeneratedProtocolMessageType('TestDynamicExtensions', (_message.Message,), {
+
+  'DynamicMessageType' : _reflection.GeneratedProtocolMessageType('DynamicMessageType', (_message.Message,), {
+    'DESCRIPTOR' : _TESTDYNAMICEXTENSIONS_DYNAMICMESSAGETYPE,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestDynamicExtensions.DynamicMessageType)
+    })
+  ,
+  'DESCRIPTOR' : _TESTDYNAMICEXTENSIONS,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestDynamicExtensions)
+  })
+_sym_db.RegisterMessage(TestDynamicExtensions)
+_sym_db.RegisterMessage(TestDynamicExtensions.DynamicMessageType)
+
+TestRepeatedScalarDifferentTagSizes = _reflection.GeneratedProtocolMessageType('TestRepeatedScalarDifferentTagSizes', (_message.Message,), {
+  'DESCRIPTOR' : _TESTREPEATEDSCALARDIFFERENTTAGSIZES,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRepeatedScalarDifferentTagSizes)
+  })
+_sym_db.RegisterMessage(TestRepeatedScalarDifferentTagSizes)
+
+TestParsingMerge = _reflection.GeneratedProtocolMessageType('TestParsingMerge', (_message.Message,), {
+
+  'RepeatedFieldsGenerator' : _reflection.GeneratedProtocolMessageType('RepeatedFieldsGenerator', (_message.Message,), {
+
+    'Group1' : _reflection.GeneratedProtocolMessageType('Group1', (_message.Message,), {
+      'DESCRIPTOR' : _TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP1,
+      '__module__' : 'google.protobuf.unittest_pb2'
+      # @@protoc_insertion_point(class_scope:protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.Group1)
+      })
+    ,
+
+    'Group2' : _reflection.GeneratedProtocolMessageType('Group2', (_message.Message,), {
+      'DESCRIPTOR' : _TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR_GROUP2,
+      '__module__' : 'google.protobuf.unittest_pb2'
+      # @@protoc_insertion_point(class_scope:protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator.Group2)
+      })
+    ,
+    'DESCRIPTOR' : _TESTPARSINGMERGE_REPEATEDFIELDSGENERATOR,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestParsingMerge.RepeatedFieldsGenerator)
+    })
+  ,
+
+  'OptionalGroup' : _reflection.GeneratedProtocolMessageType('OptionalGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTPARSINGMERGE_OPTIONALGROUP,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestParsingMerge.OptionalGroup)
+    })
+  ,
+
+  'RepeatedGroup' : _reflection.GeneratedProtocolMessageType('RepeatedGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTPARSINGMERGE_REPEATEDGROUP,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestParsingMerge.RepeatedGroup)
+    })
+  ,
+  'DESCRIPTOR' : _TESTPARSINGMERGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestParsingMerge)
+  })
+_sym_db.RegisterMessage(TestParsingMerge)
+_sym_db.RegisterMessage(TestParsingMerge.RepeatedFieldsGenerator)
+_sym_db.RegisterMessage(TestParsingMerge.RepeatedFieldsGenerator.Group1)
+_sym_db.RegisterMessage(TestParsingMerge.RepeatedFieldsGenerator.Group2)
+_sym_db.RegisterMessage(TestParsingMerge.OptionalGroup)
+_sym_db.RegisterMessage(TestParsingMerge.RepeatedGroup)
+
+TestCommentInjectionMessage = _reflection.GeneratedProtocolMessageType('TestCommentInjectionMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTCOMMENTINJECTIONMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestCommentInjectionMessage)
+  })
+_sym_db.RegisterMessage(TestCommentInjectionMessage)
+
+FooRequest = _reflection.GeneratedProtocolMessageType('FooRequest', (_message.Message,), {
+  'DESCRIPTOR' : _FOOREQUEST,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.FooRequest)
+  })
+_sym_db.RegisterMessage(FooRequest)
+
+FooResponse = _reflection.GeneratedProtocolMessageType('FooResponse', (_message.Message,), {
+  'DESCRIPTOR' : _FOORESPONSE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.FooResponse)
+  })
+_sym_db.RegisterMessage(FooResponse)
+
+FooClientMessage = _reflection.GeneratedProtocolMessageType('FooClientMessage', (_message.Message,), {
+  'DESCRIPTOR' : _FOOCLIENTMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.FooClientMessage)
+  })
+_sym_db.RegisterMessage(FooClientMessage)
+
+FooServerMessage = _reflection.GeneratedProtocolMessageType('FooServerMessage', (_message.Message,), {
+  'DESCRIPTOR' : _FOOSERVERMESSAGE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.FooServerMessage)
+  })
+_sym_db.RegisterMessage(FooServerMessage)
+
+BarRequest = _reflection.GeneratedProtocolMessageType('BarRequest', (_message.Message,), {
+  'DESCRIPTOR' : _BARREQUEST,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.BarRequest)
+  })
+_sym_db.RegisterMessage(BarRequest)
+
+BarResponse = _reflection.GeneratedProtocolMessageType('BarResponse', (_message.Message,), {
+  'DESCRIPTOR' : _BARRESPONSE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.BarResponse)
+  })
+_sym_db.RegisterMessage(BarResponse)
+
+TestJsonName = _reflection.GeneratedProtocolMessageType('TestJsonName', (_message.Message,), {
+  'DESCRIPTOR' : _TESTJSONNAME,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestJsonName)
+  })
+_sym_db.RegisterMessage(TestJsonName)
+
+TestHugeFieldNumbers = _reflection.GeneratedProtocolMessageType('TestHugeFieldNumbers', (_message.Message,), {
+
+  'OptionalGroup' : _reflection.GeneratedProtocolMessageType('OptionalGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTHUGEFIELDNUMBERS_OPTIONALGROUP,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestHugeFieldNumbers.OptionalGroup)
+    })
+  ,
+
+  'StringStringMapEntry' : _reflection.GeneratedProtocolMessageType('StringStringMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTHUGEFIELDNUMBERS_STRINGSTRINGMAPENTRY,
+    '__module__' : 'google.protobuf.unittest_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestHugeFieldNumbers.StringStringMapEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTHUGEFIELDNUMBERS,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestHugeFieldNumbers)
+  })
+_sym_db.RegisterMessage(TestHugeFieldNumbers)
+_sym_db.RegisterMessage(TestHugeFieldNumbers.OptionalGroup)
+_sym_db.RegisterMessage(TestHugeFieldNumbers.StringStringMapEntry)
+
+TestExtensionInsideTable = _reflection.GeneratedProtocolMessageType('TestExtensionInsideTable', (_message.Message,), {
+  'DESCRIPTOR' : _TESTEXTENSIONINSIDETABLE,
+  '__module__' : 'google.protobuf.unittest_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestExtensionInsideTable)
+  })
+_sym_db.RegisterMessage(TestExtensionInsideTable)
+
+TestAllExtensions.RegisterExtension(optional_int32_extension)
+TestAllExtensions.RegisterExtension(optional_int64_extension)
+TestAllExtensions.RegisterExtension(optional_uint32_extension)
+TestAllExtensions.RegisterExtension(optional_uint64_extension)
+TestAllExtensions.RegisterExtension(optional_sint32_extension)
+TestAllExtensions.RegisterExtension(optional_sint64_extension)
+TestAllExtensions.RegisterExtension(optional_fixed32_extension)
+TestAllExtensions.RegisterExtension(optional_fixed64_extension)
+TestAllExtensions.RegisterExtension(optional_sfixed32_extension)
+TestAllExtensions.RegisterExtension(optional_sfixed64_extension)
+TestAllExtensions.RegisterExtension(optional_float_extension)
+TestAllExtensions.RegisterExtension(optional_double_extension)
+TestAllExtensions.RegisterExtension(optional_bool_extension)
+TestAllExtensions.RegisterExtension(optional_string_extension)
+TestAllExtensions.RegisterExtension(optional_bytes_extension)
+optionalgroup_extension.message_type = _OPTIONALGROUP_EXTENSION
+TestAllExtensions.RegisterExtension(optionalgroup_extension)
+optional_nested_message_extension.message_type = _TESTALLTYPES_NESTEDMESSAGE
+TestAllExtensions.RegisterExtension(optional_nested_message_extension)
+optional_foreign_message_extension.message_type = _FOREIGNMESSAGE
+TestAllExtensions.RegisterExtension(optional_foreign_message_extension)
+optional_import_message_extension.message_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTMESSAGE
+TestAllExtensions.RegisterExtension(optional_import_message_extension)
+optional_nested_enum_extension.enum_type = _TESTALLTYPES_NESTEDENUM
+TestAllExtensions.RegisterExtension(optional_nested_enum_extension)
+optional_foreign_enum_extension.enum_type = _FOREIGNENUM
+TestAllExtensions.RegisterExtension(optional_foreign_enum_extension)
+optional_import_enum_extension.enum_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTENUM
+TestAllExtensions.RegisterExtension(optional_import_enum_extension)
+TestAllExtensions.RegisterExtension(optional_string_piece_extension)
+TestAllExtensions.RegisterExtension(optional_cord_extension)
+optional_public_import_message_extension.message_type = google_dot_protobuf_dot_unittest__import__public__pb2._PUBLICIMPORTMESSAGE
+TestAllExtensions.RegisterExtension(optional_public_import_message_extension)
+optional_lazy_message_extension.message_type = _TESTALLTYPES_NESTEDMESSAGE
+TestAllExtensions.RegisterExtension(optional_lazy_message_extension)
+TestAllExtensions.RegisterExtension(repeated_int32_extension)
+TestAllExtensions.RegisterExtension(repeated_int64_extension)
+TestAllExtensions.RegisterExtension(repeated_uint32_extension)
+TestAllExtensions.RegisterExtension(repeated_uint64_extension)
+TestAllExtensions.RegisterExtension(repeated_sint32_extension)
+TestAllExtensions.RegisterExtension(repeated_sint64_extension)
+TestAllExtensions.RegisterExtension(repeated_fixed32_extension)
+TestAllExtensions.RegisterExtension(repeated_fixed64_extension)
+TestAllExtensions.RegisterExtension(repeated_sfixed32_extension)
+TestAllExtensions.RegisterExtension(repeated_sfixed64_extension)
+TestAllExtensions.RegisterExtension(repeated_float_extension)
+TestAllExtensions.RegisterExtension(repeated_double_extension)
+TestAllExtensions.RegisterExtension(repeated_bool_extension)
+TestAllExtensions.RegisterExtension(repeated_string_extension)
+TestAllExtensions.RegisterExtension(repeated_bytes_extension)
+repeatedgroup_extension.message_type = _REPEATEDGROUP_EXTENSION
+TestAllExtensions.RegisterExtension(repeatedgroup_extension)
+repeated_nested_message_extension.message_type = _TESTALLTYPES_NESTEDMESSAGE
+TestAllExtensions.RegisterExtension(repeated_nested_message_extension)
+repeated_foreign_message_extension.message_type = _FOREIGNMESSAGE
+TestAllExtensions.RegisterExtension(repeated_foreign_message_extension)
+repeated_import_message_extension.message_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTMESSAGE
+TestAllExtensions.RegisterExtension(repeated_import_message_extension)
+repeated_nested_enum_extension.enum_type = _TESTALLTYPES_NESTEDENUM
+TestAllExtensions.RegisterExtension(repeated_nested_enum_extension)
+repeated_foreign_enum_extension.enum_type = _FOREIGNENUM
+TestAllExtensions.RegisterExtension(repeated_foreign_enum_extension)
+repeated_import_enum_extension.enum_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTENUM
+TestAllExtensions.RegisterExtension(repeated_import_enum_extension)
+TestAllExtensions.RegisterExtension(repeated_string_piece_extension)
+TestAllExtensions.RegisterExtension(repeated_cord_extension)
+repeated_lazy_message_extension.message_type = _TESTALLTYPES_NESTEDMESSAGE
+TestAllExtensions.RegisterExtension(repeated_lazy_message_extension)
+TestAllExtensions.RegisterExtension(default_int32_extension)
+TestAllExtensions.RegisterExtension(default_int64_extension)
+TestAllExtensions.RegisterExtension(default_uint32_extension)
+TestAllExtensions.RegisterExtension(default_uint64_extension)
+TestAllExtensions.RegisterExtension(default_sint32_extension)
+TestAllExtensions.RegisterExtension(default_sint64_extension)
+TestAllExtensions.RegisterExtension(default_fixed32_extension)
+TestAllExtensions.RegisterExtension(default_fixed64_extension)
+TestAllExtensions.RegisterExtension(default_sfixed32_extension)
+TestAllExtensions.RegisterExtension(default_sfixed64_extension)
+TestAllExtensions.RegisterExtension(default_float_extension)
+TestAllExtensions.RegisterExtension(default_double_extension)
+TestAllExtensions.RegisterExtension(default_bool_extension)
+TestAllExtensions.RegisterExtension(default_string_extension)
+TestAllExtensions.RegisterExtension(default_bytes_extension)
+default_nested_enum_extension.enum_type = _TESTALLTYPES_NESTEDENUM
+TestAllExtensions.RegisterExtension(default_nested_enum_extension)
+default_foreign_enum_extension.enum_type = _FOREIGNENUM
+TestAllExtensions.RegisterExtension(default_foreign_enum_extension)
+default_import_enum_extension.enum_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTENUM
+TestAllExtensions.RegisterExtension(default_import_enum_extension)
+TestAllExtensions.RegisterExtension(default_string_piece_extension)
+TestAllExtensions.RegisterExtension(default_cord_extension)
+TestAllExtensions.RegisterExtension(oneof_uint32_extension)
+oneof_nested_message_extension.message_type = _TESTALLTYPES_NESTEDMESSAGE
+TestAllExtensions.RegisterExtension(oneof_nested_message_extension)
+TestAllExtensions.RegisterExtension(oneof_string_extension)
+TestAllExtensions.RegisterExtension(oneof_bytes_extension)
+TestFieldOrderings.RegisterExtension(my_extension_string)
+TestFieldOrderings.RegisterExtension(my_extension_int)
+TestPackedExtensions.RegisterExtension(packed_int32_extension)
+TestPackedExtensions.RegisterExtension(packed_int64_extension)
+TestPackedExtensions.RegisterExtension(packed_uint32_extension)
+TestPackedExtensions.RegisterExtension(packed_uint64_extension)
+TestPackedExtensions.RegisterExtension(packed_sint32_extension)
+TestPackedExtensions.RegisterExtension(packed_sint64_extension)
+TestPackedExtensions.RegisterExtension(packed_fixed32_extension)
+TestPackedExtensions.RegisterExtension(packed_fixed64_extension)
+TestPackedExtensions.RegisterExtension(packed_sfixed32_extension)
+TestPackedExtensions.RegisterExtension(packed_sfixed64_extension)
+TestPackedExtensions.RegisterExtension(packed_float_extension)
+TestPackedExtensions.RegisterExtension(packed_double_extension)
+TestPackedExtensions.RegisterExtension(packed_bool_extension)
+packed_enum_extension.enum_type = _FOREIGNENUM
+TestPackedExtensions.RegisterExtension(packed_enum_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_int32_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_int64_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_uint32_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_uint64_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_sint32_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_sint64_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_fixed32_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_fixed64_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_sfixed32_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_sfixed64_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_float_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_double_extension)
+TestUnpackedExtensions.RegisterExtension(unpacked_bool_extension)
+unpacked_enum_extension.enum_type = _FOREIGNENUM
+TestUnpackedExtensions.RegisterExtension(unpacked_enum_extension)
+test_all_types.message_type = _TESTALLTYPES
+TestHugeFieldNumbers.RegisterExtension(test_all_types)
+TestExtensionInsideTable.RegisterExtension(test_extension_inside_table_extension)
+TestAllExtensions.RegisterExtension(_TESTNESTEDEXTENSION.extensions_by_name['test'])
+TestAllExtensions.RegisterExtension(_TESTNESTEDEXTENSION.extensions_by_name['nested_string_extension'])
+_TESTNESTEDEXTENSION.extensions_by_name['optionalgroup_extension'].message_type = _TESTNESTEDEXTENSION_OPTIONALGROUP_EXTENSION
+TestGroupExtension.RegisterExtension(_TESTNESTEDEXTENSION.extensions_by_name['optionalgroup_extension'])
+_TESTNESTEDEXTENSION.extensions_by_name['optional_foreign_enum_extension'].enum_type = _FOREIGNENUM
+TestGroupExtension.RegisterExtension(_TESTNESTEDEXTENSION.extensions_by_name['optional_foreign_enum_extension'])
+_TESTREQUIRED.extensions_by_name['single'].message_type = _TESTREQUIRED
+TestAllExtensions.RegisterExtension(_TESTREQUIRED.extensions_by_name['single'])
+_TESTREQUIRED.extensions_by_name['multi'].message_type = _TESTREQUIRED
+TestAllExtensions.RegisterExtension(_TESTREQUIRED.extensions_by_name['multi'])
+_TESTEXTENSIONORDERINGS1.extensions_by_name['test_ext_orderings1'].message_type = _TESTEXTENSIONORDERINGS1
+TestFieldOrderings.RegisterExtension(_TESTEXTENSIONORDERINGS1.extensions_by_name['test_ext_orderings1'])
+_TESTEXTENSIONORDERINGS2_TESTEXTENSIONORDERINGS3.extensions_by_name['test_ext_orderings3'].message_type = _TESTEXTENSIONORDERINGS2_TESTEXTENSIONORDERINGS3
+TestFieldOrderings.RegisterExtension(_TESTEXTENSIONORDERINGS2_TESTEXTENSIONORDERINGS3.extensions_by_name['test_ext_orderings3'])
+_TESTEXTENSIONORDERINGS2.extensions_by_name['test_ext_orderings2'].message_type = _TESTEXTENSIONORDERINGS2
+TestFieldOrderings.RegisterExtension(_TESTEXTENSIONORDERINGS2.extensions_by_name['test_ext_orderings2'])
+_TESTPARSINGMERGE.extensions_by_name['optional_ext'].message_type = _TESTALLTYPES
+TestParsingMerge.RegisterExtension(_TESTPARSINGMERGE.extensions_by_name['optional_ext'])
+_TESTPARSINGMERGE.extensions_by_name['repeated_ext'].message_type = _TESTALLTYPES
+TestParsingMerge.RegisterExtension(_TESTPARSINGMERGE.extensions_by_name['repeated_ext'])
+
+DESCRIPTOR._options = None
+_TESTENUMWITHDUPVALUE._options = None
+optional_string_piece_extension._options = None
+optional_cord_extension._options = None
+optional_lazy_message_extension._options = None
+repeated_string_piece_extension._options = None
+repeated_cord_extension._options = None
+repeated_lazy_message_extension._options = None
+default_string_piece_extension._options = None
+default_cord_extension._options = None
+packed_int32_extension._options = None
+packed_int64_extension._options = None
+packed_uint32_extension._options = None
+packed_uint64_extension._options = None
+packed_sint32_extension._options = None
+packed_sint64_extension._options = None
+packed_fixed32_extension._options = None
+packed_fixed64_extension._options = None
+packed_sfixed32_extension._options = None
+packed_sfixed64_extension._options = None
+packed_float_extension._options = None
+packed_double_extension._options = None
+packed_bool_extension._options = None
+packed_enum_extension._options = None
+unpacked_int32_extension._options = None
+unpacked_int64_extension._options = None
+unpacked_uint32_extension._options = None
+unpacked_uint64_extension._options = None
+unpacked_sint32_extension._options = None
+unpacked_sint64_extension._options = None
+unpacked_fixed32_extension._options = None
+unpacked_fixed64_extension._options = None
+unpacked_sfixed32_extension._options = None
+unpacked_sfixed64_extension._options = None
+unpacked_float_extension._options = None
+unpacked_double_extension._options = None
+unpacked_bool_extension._options = None
+unpacked_enum_extension._options = None
+_TESTALLTYPES.fields_by_name['optional_string_piece']._options = None
+_TESTALLTYPES.fields_by_name['optional_cord']._options = None
+_TESTALLTYPES.fields_by_name['optional_lazy_message']._options = None
+_TESTALLTYPES.fields_by_name['repeated_string_piece']._options = None
+_TESTALLTYPES.fields_by_name['repeated_cord']._options = None
+_TESTALLTYPES.fields_by_name['repeated_lazy_message']._options = None
+_TESTALLTYPES.fields_by_name['default_string_piece']._options = None
+_TESTALLTYPES.fields_by_name['default_cord']._options = None
+_TESTDEPRECATEDFIELDS.fields_by_name['deprecated_int32']._options = None
+_TESTDEPRECATEDFIELDS.fields_by_name['deprecated_int32_in_oneof']._options = None
+_TESTDEPRECATEDMESSAGE._options = None
+_TESTEAGERMESSAGE.fields_by_name['sub_message']._options = None
+_TESTLAZYMESSAGE.fields_by_name['sub_message']._options = None
+_TESTCAMELCASEFIELDNAMES.fields_by_name['StringPieceField']._options = None
+_TESTCAMELCASEFIELDNAMES.fields_by_name['CordField']._options = None
+_TESTCAMELCASEFIELDNAMES.fields_by_name['RepeatedStringPieceField']._options = None
+_TESTCAMELCASEFIELDNAMES.fields_by_name['RepeatedCordField']._options = None
+_TESTEXTREMEDEFAULTVALUES.fields_by_name['string_piece_with_zero']._options = None
+_TESTEXTREMEDEFAULTVALUES.fields_by_name['cord_with_zero']._options = None
+_TESTONEOF2.fields_by_name['foo_cord']._options = None
+_TESTONEOF2.fields_by_name['foo_string_piece']._options = None
+_TESTONEOF2.fields_by_name['foo_lazy_message']._options = None
+_TESTONEOF2.fields_by_name['bar_cord']._options = None
+_TESTONEOF2.fields_by_name['bar_string_piece']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_int32']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_int64']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_uint32']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_uint64']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_sint32']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_sint64']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_fixed32']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_fixed64']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_sfixed32']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_sfixed64']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_float']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_double']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_bool']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_enum']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_int32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_int64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_uint32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_uint64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_sint32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_sint64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_fixed32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_fixed64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_sfixed32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_sfixed64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_float']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_double']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_bool']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['unpacked_enum']._options = None
+_TESTDYNAMICEXTENSIONS.fields_by_name['packed_extension']._options = None
+_TESTHUGEFIELDNUMBERS_STRINGSTRINGMAPENTRY._options = None
+_TESTHUGEFIELDNUMBERS.fields_by_name['repeated_int32']._options = None
+_TESTHUGEFIELDNUMBERS.fields_by_name['packed_int32']._options = None
+
+_TESTSERVICE = _descriptor.ServiceDescriptor(
+  name='TestService',
+  full_name='protobuf_unittest.TestService',
+  file=DESCRIPTOR,
+  index=0,
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_start=17615,
+  serialized_end=17768,
+  methods=[
+  _descriptor.MethodDescriptor(
+    name='Foo',
+    full_name='protobuf_unittest.TestService.Foo',
+    index=0,
+    containing_service=None,
+    input_type=_FOOREQUEST,
+    output_type=_FOORESPONSE,
+    serialized_options=None,
+    create_key=_descriptor._internal_create_key,
+  ),
+  _descriptor.MethodDescriptor(
+    name='Bar',
+    full_name='protobuf_unittest.TestService.Bar',
+    index=1,
+    containing_service=None,
+    input_type=_BARREQUEST,
+    output_type=_BARRESPONSE,
+    serialized_options=None,
+    create_key=_descriptor._internal_create_key,
+  ),
+])
+_sym_db.RegisterServiceDescriptor(_TESTSERVICE)
+
+DESCRIPTOR.services_by_name['TestService'] = _TESTSERVICE
+
+TestService = service_reflection.GeneratedServiceType('TestService', (_service.Service,), dict(
+  DESCRIPTOR = _TESTSERVICE,
+  __module__ = 'google.protobuf.unittest_pb2'
+  ))
+
+TestService_Stub = service_reflection.GeneratedServiceStubType('TestService_Stub', (TestService,), dict(
+  DESCRIPTOR = _TESTSERVICE,
+  __module__ = 'google.protobuf.unittest_pb2'
+  ))
+
+
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_proto3_arena_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_proto3_arena_pb2.py
new file mode 100644
index 0000000..a792f9f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/unittest_proto3_arena_pb2.py
@@ -0,0 +1,1132 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/unittest_proto3_arena.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import unittest_import_pb2 as google_dot_protobuf_dot_unittest__import__pb2
+try:
+  google_dot_protobuf_dot_unittest__import__public__pb2 = google_dot_protobuf_dot_unittest__import__pb2.google_dot_protobuf_dot_unittest__import__public__pb2
+except AttributeError:
+  google_dot_protobuf_dot_unittest__import__public__pb2 = google_dot_protobuf_dot_unittest__import__pb2.google.protobuf.unittest_import_public_pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/unittest_proto3_arena.proto',
+  package='proto3_arena_unittest',
+  syntax='proto3',
+  serialized_options=b'\370\001\001',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n+google/protobuf/unittest_proto3_arena.proto\x12\x15proto3_arena_unittest\x1a%google/protobuf/unittest_import.proto\"\xc9\x11\n\x0cTestAllTypes\x12\x16\n\x0eoptional_int32\x18\x01 \x01(\x05\x12\x16\n\x0eoptional_int64\x18\x02 \x01(\x03\x12\x17\n\x0foptional_uint32\x18\x03 \x01(\r\x12\x17\n\x0foptional_uint64\x18\x04 \x01(\x04\x12\x17\n\x0foptional_sint32\x18\x05 \x01(\x11\x12\x17\n\x0foptional_sint64\x18\x06 \x01(\x12\x12\x18\n\x10optional_fixed32\x18\x07 \x01(\x07\x12\x18\n\x10optional_fixed64\x18\x08 \x01(\x06\x12\x19\n\x11optional_sfixed32\x18\t \x01(\x0f\x12\x19\n\x11optional_sfixed64\x18\n \x01(\x10\x12\x16\n\x0eoptional_float\x18\x0b \x01(\x02\x12\x17\n\x0foptional_double\x18\x0c \x01(\x01\x12\x15\n\roptional_bool\x18\r \x01(\x08\x12\x17\n\x0foptional_string\x18\x0e \x01(\t\x12\x16\n\x0eoptional_bytes\x18\x0f \x01(\x0c\x12R\n\x17optional_nested_message\x18\x12 \x01(\x0b\x32\x31.proto3_arena_unittest.TestAllTypes.NestedMessage\x12G\n\x18optional_foreign_message\x18\x13 \x01(\x0b\x32%.proto3_arena_unittest.ForeignMessage\x12H\n\x17optional_import_message\x18\x14 \x01(\x0b\x32\'.protobuf_unittest_import.ImportMessage\x12L\n\x14optional_nested_enum\x18\x15 \x01(\x0e\x32..proto3_arena_unittest.TestAllTypes.NestedEnum\x12\x41\n\x15optional_foreign_enum\x18\x16 \x01(\x0e\x32\".proto3_arena_unittest.ForeignEnum\x12!\n\x15optional_string_piece\x18\x18 \x01(\tB\x02\x08\x02\x12\x19\n\roptional_cord\x18\x19 \x01(\tB\x02\x08\x01\x12U\n\x1eoptional_public_import_message\x18\x1a \x01(\x0b\x32-.protobuf_unittest_import.PublicImportMessage\x12T\n\x15optional_lazy_message\x18\x1b \x01(\x0b\x32\x31.proto3_arena_unittest.TestAllTypes.NestedMessageB\x02(\x01\x12Q\n\x1coptional_lazy_import_message\x18s \x01(\x0b\x32\'.protobuf_unittest_import.ImportMessageB\x02(\x01\x12\x16\n\x0erepeated_int32\x18\x1f \x03(\x05\x12\x16\n\x0erepeated_int64\x18  \x03(\x03\x12\x17\n\x0frepeated_uint32\x18! \x03(\r\x12\x17\n\x0frepeated_uint64\x18\" \x03(\x04\x12\x17\n\x0frepeated_sint32\x18# \x03(\x11\x12\x17\n\x0frepeated_sint64\x18$ \x03(\x12\x12\x18\n\x10repeated_fixed32\x18% \x03(\x07\x12\x18\n\x10repeated_fixed64\x18& \x03(\x06\x12\x19\n\x11repeated_sfixed32\x18\' \x03(\x0f\x12\x19\n\x11repeated_sfixed64\x18( \x03(\x10\x12\x16\n\x0erepeated_float\x18) \x03(\x02\x12\x17\n\x0frepeated_double\x18* \x03(\x01\x12\x15\n\rrepeated_bool\x18+ \x03(\x08\x12\x17\n\x0frepeated_string\x18, \x03(\t\x12\x16\n\x0erepeated_bytes\x18- \x03(\x0c\x12R\n\x17repeated_nested_message\x18\x30 \x03(\x0b\x32\x31.proto3_arena_unittest.TestAllTypes.NestedMessage\x12G\n\x18repeated_foreign_message\x18\x31 \x03(\x0b\x32%.proto3_arena_unittest.ForeignMessage\x12H\n\x17repeated_import_message\x18\x32 \x03(\x0b\x32\'.protobuf_unittest_import.ImportMessage\x12L\n\x14repeated_nested_enum\x18\x33 \x03(\x0e\x32..proto3_arena_unittest.TestAllTypes.NestedEnum\x12\x41\n\x15repeated_foreign_enum\x18\x34 \x03(\x0e\x32\".proto3_arena_unittest.ForeignEnum\x12!\n\x15repeated_string_piece\x18\x36 \x03(\tB\x02\x08\x02\x12\x19\n\rrepeated_cord\x18\x37 \x03(\tB\x02\x08\x01\x12T\n\x15repeated_lazy_message\x18\x39 \x03(\x0b\x32\x31.proto3_arena_unittest.TestAllTypes.NestedMessageB\x02(\x01\x12\x16\n\x0coneof_uint32\x18o \x01(\rH\x00\x12Q\n\x14oneof_nested_message\x18p \x01(\x0b\x32\x31.proto3_arena_unittest.TestAllTypes.NestedMessageH\x00\x12\x16\n\x0coneof_string\x18q \x01(\tH\x00\x12\x15\n\x0boneof_bytes\x18r \x01(\x0cH\x00\x1a\x1b\n\rNestedMessage\x12\n\n\x02\x62\x62\x18\x01 \x01(\x05\"C\n\nNestedEnum\x12\x08\n\x04ZERO\x10\x00\x12\x07\n\x03\x46OO\x10\x01\x12\x07\n\x03\x42\x41R\x10\x02\x12\x07\n\x03\x42\x41Z\x10\x03\x12\x10\n\x03NEG\x10\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01\x42\r\n\x0boneof_field\"\xae\x03\n\x0fTestPackedTypes\x12\x18\n\x0cpacked_int32\x18Z \x03(\x05\x42\x02\x10\x01\x12\x18\n\x0cpacked_int64\x18[ \x03(\x03\x42\x02\x10\x01\x12\x19\n\rpacked_uint32\x18\\ \x03(\rB\x02\x10\x01\x12\x19\n\rpacked_uint64\x18] \x03(\x04\x42\x02\x10\x01\x12\x19\n\rpacked_sint32\x18^ \x03(\x11\x42\x02\x10\x01\x12\x19\n\rpacked_sint64\x18_ \x03(\x12\x42\x02\x10\x01\x12\x1a\n\x0epacked_fixed32\x18` \x03(\x07\x42\x02\x10\x01\x12\x1a\n\x0epacked_fixed64\x18\x61 \x03(\x06\x42\x02\x10\x01\x12\x1b\n\x0fpacked_sfixed32\x18\x62 \x03(\x0f\x42\x02\x10\x01\x12\x1b\n\x0fpacked_sfixed64\x18\x63 \x03(\x10\x42\x02\x10\x01\x12\x18\n\x0cpacked_float\x18\x64 \x03(\x02\x42\x02\x10\x01\x12\x19\n\rpacked_double\x18\x65 \x03(\x01\x42\x02\x10\x01\x12\x17\n\x0bpacked_bool\x18\x66 \x03(\x08\x42\x02\x10\x01\x12;\n\x0bpacked_enum\x18g \x03(\x0e\x32\".proto3_arena_unittest.ForeignEnumB\x02\x10\x01\"\xdf\x03\n\x11TestUnpackedTypes\x12\x1a\n\x0erepeated_int32\x18\x01 \x03(\x05\x42\x02\x10\x00\x12\x1a\n\x0erepeated_int64\x18\x02 \x03(\x03\x42\x02\x10\x00\x12\x1b\n\x0frepeated_uint32\x18\x03 \x03(\rB\x02\x10\x00\x12\x1b\n\x0frepeated_uint64\x18\x04 \x03(\x04\x42\x02\x10\x00\x12\x1b\n\x0frepeated_sint32\x18\x05 \x03(\x11\x42\x02\x10\x00\x12\x1b\n\x0frepeated_sint64\x18\x06 \x03(\x12\x42\x02\x10\x00\x12\x1c\n\x10repeated_fixed32\x18\x07 \x03(\x07\x42\x02\x10\x00\x12\x1c\n\x10repeated_fixed64\x18\x08 \x03(\x06\x42\x02\x10\x00\x12\x1d\n\x11repeated_sfixed32\x18\t \x03(\x0f\x42\x02\x10\x00\x12\x1d\n\x11repeated_sfixed64\x18\n \x03(\x10\x42\x02\x10\x00\x12\x1a\n\x0erepeated_float\x18\x0b \x03(\x02\x42\x02\x10\x00\x12\x1b\n\x0frepeated_double\x18\x0c \x03(\x01\x42\x02\x10\x00\x12\x19\n\rrepeated_bool\x18\r \x03(\x08\x42\x02\x10\x00\x12P\n\x14repeated_nested_enum\x18\x0e \x03(\x0e\x32..proto3_arena_unittest.TestAllTypes.NestedEnumB\x02\x10\x00\"\xc7\x01\n\x12NestedTestAllTypes\x12\x38\n\x05\x63hild\x18\x01 \x01(\x0b\x32).proto3_arena_unittest.NestedTestAllTypes\x12\x34\n\x07payload\x18\x02 \x01(\x0b\x32#.proto3_arena_unittest.TestAllTypes\x12\x41\n\x0erepeated_child\x18\x03 \x03(\x0b\x32).proto3_arena_unittest.NestedTestAllTypes\"\x1b\n\x0e\x46oreignMessage\x12\t\n\x01\x63\x18\x01 \x01(\x05\"\x12\n\x10TestEmptyMessage\"Y\n\x17TestPickleNestedMessage\x1a>\n\rNestedMessage\x12\n\n\x02\x62\x62\x18\x01 \x01(\x05\x1a!\n\x13NestedNestedMessage\x12\n\n\x02\x63\x63\x18\x01 \x01(\x05*R\n\x0b\x46oreignEnum\x12\x10\n\x0c\x46OREIGN_ZERO\x10\x00\x12\x0f\n\x0b\x46OREIGN_FOO\x10\x04\x12\x0f\n\x0b\x46OREIGN_BAR\x10\x05\x12\x0f\n\x0b\x46OREIGN_BAZ\x10\x06\x42\x03\xf8\x01\x01\x62\x06proto3'
+  ,
+  dependencies=[google_dot_protobuf_dot_unittest__import__pb2.DESCRIPTOR,])
+
+_FOREIGNENUM = _descriptor.EnumDescriptor(
+  name='ForeignEnum',
+  full_name='proto3_arena_unittest.ForeignEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_ZERO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_FOO', index=1, number=4,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_BAR', index=2, number=5,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOREIGN_BAZ', index=3, number=6,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=3618,
+  serialized_end=3700,
+)
+_sym_db.RegisterEnumDescriptor(_FOREIGNENUM)
+
+ForeignEnum = enum_type_wrapper.EnumTypeWrapper(_FOREIGNENUM)
+FOREIGN_ZERO = 0
+FOREIGN_FOO = 4
+FOREIGN_BAR = 5
+FOREIGN_BAZ = 6
+
+
+_TESTALLTYPES_NESTEDENUM = _descriptor.EnumDescriptor(
+  name='NestedEnum',
+  full_name='proto3_arena_unittest.TestAllTypes.NestedEnum',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='ZERO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='FOO', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAZ', index=3, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='NEG', index=4, number=-1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=2277,
+  serialized_end=2344,
+)
+_sym_db.RegisterEnumDescriptor(_TESTALLTYPES_NESTEDENUM)
+
+
+_TESTALLTYPES_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='proto3_arena_unittest.TestAllTypes.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bb', full_name='proto3_arena_unittest.TestAllTypes.NestedMessage.bb', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2248,
+  serialized_end=2275,
+)
+
+_TESTALLTYPES = _descriptor.Descriptor(
+  name='TestAllTypes',
+  full_name='proto3_arena_unittest.TestAllTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='optional_int32', full_name='proto3_arena_unittest.TestAllTypes.optional_int32', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_int64', full_name='proto3_arena_unittest.TestAllTypes.optional_int64', index=1,
+      number=2, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint32', full_name='proto3_arena_unittest.TestAllTypes.optional_uint32', index=2,
+      number=3, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_uint64', full_name='proto3_arena_unittest.TestAllTypes.optional_uint64', index=3,
+      number=4, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sint32', full_name='proto3_arena_unittest.TestAllTypes.optional_sint32', index=4,
+      number=5, type=17, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sint64', full_name='proto3_arena_unittest.TestAllTypes.optional_sint64', index=5,
+      number=6, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_fixed32', full_name='proto3_arena_unittest.TestAllTypes.optional_fixed32', index=6,
+      number=7, type=7, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_fixed64', full_name='proto3_arena_unittest.TestAllTypes.optional_fixed64', index=7,
+      number=8, type=6, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sfixed32', full_name='proto3_arena_unittest.TestAllTypes.optional_sfixed32', index=8,
+      number=9, type=15, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_sfixed64', full_name='proto3_arena_unittest.TestAllTypes.optional_sfixed64', index=9,
+      number=10, type=16, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_float', full_name='proto3_arena_unittest.TestAllTypes.optional_float', index=10,
+      number=11, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_double', full_name='proto3_arena_unittest.TestAllTypes.optional_double', index=11,
+      number=12, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bool', full_name='proto3_arena_unittest.TestAllTypes.optional_bool', index=12,
+      number=13, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string', full_name='proto3_arena_unittest.TestAllTypes.optional_string', index=13,
+      number=14, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_bytes', full_name='proto3_arena_unittest.TestAllTypes.optional_bytes', index=14,
+      number=15, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_message', full_name='proto3_arena_unittest.TestAllTypes.optional_nested_message', index=15,
+      number=18, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_foreign_message', full_name='proto3_arena_unittest.TestAllTypes.optional_foreign_message', index=16,
+      number=19, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_import_message', full_name='proto3_arena_unittest.TestAllTypes.optional_import_message', index=17,
+      number=20, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_nested_enum', full_name='proto3_arena_unittest.TestAllTypes.optional_nested_enum', index=18,
+      number=21, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_foreign_enum', full_name='proto3_arena_unittest.TestAllTypes.optional_foreign_enum', index=19,
+      number=22, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_string_piece', full_name='proto3_arena_unittest.TestAllTypes.optional_string_piece', index=20,
+      number=24, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_cord', full_name='proto3_arena_unittest.TestAllTypes.optional_cord', index=21,
+      number=25, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_public_import_message', full_name='proto3_arena_unittest.TestAllTypes.optional_public_import_message', index=22,
+      number=26, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_lazy_message', full_name='proto3_arena_unittest.TestAllTypes.optional_lazy_message', index=23,
+      number=27, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'(\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='optional_lazy_import_message', full_name='proto3_arena_unittest.TestAllTypes.optional_lazy_import_message', index=24,
+      number=115, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'(\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int32', full_name='proto3_arena_unittest.TestAllTypes.repeated_int32', index=25,
+      number=31, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64', full_name='proto3_arena_unittest.TestAllTypes.repeated_int64', index=26,
+      number=32, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint32', full_name='proto3_arena_unittest.TestAllTypes.repeated_uint32', index=27,
+      number=33, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint64', full_name='proto3_arena_unittest.TestAllTypes.repeated_uint64', index=28,
+      number=34, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint32', full_name='proto3_arena_unittest.TestAllTypes.repeated_sint32', index=29,
+      number=35, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint64', full_name='proto3_arena_unittest.TestAllTypes.repeated_sint64', index=30,
+      number=36, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed32', full_name='proto3_arena_unittest.TestAllTypes.repeated_fixed32', index=31,
+      number=37, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed64', full_name='proto3_arena_unittest.TestAllTypes.repeated_fixed64', index=32,
+      number=38, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed32', full_name='proto3_arena_unittest.TestAllTypes.repeated_sfixed32', index=33,
+      number=39, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed64', full_name='proto3_arena_unittest.TestAllTypes.repeated_sfixed64', index=34,
+      number=40, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float', full_name='proto3_arena_unittest.TestAllTypes.repeated_float', index=35,
+      number=41, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_double', full_name='proto3_arena_unittest.TestAllTypes.repeated_double', index=36,
+      number=42, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bool', full_name='proto3_arena_unittest.TestAllTypes.repeated_bool', index=37,
+      number=43, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string', full_name='proto3_arena_unittest.TestAllTypes.repeated_string', index=38,
+      number=44, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bytes', full_name='proto3_arena_unittest.TestAllTypes.repeated_bytes', index=39,
+      number=45, type=12, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_message', full_name='proto3_arena_unittest.TestAllTypes.repeated_nested_message', index=40,
+      number=48, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_foreign_message', full_name='proto3_arena_unittest.TestAllTypes.repeated_foreign_message', index=41,
+      number=49, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_import_message', full_name='proto3_arena_unittest.TestAllTypes.repeated_import_message', index=42,
+      number=50, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_enum', full_name='proto3_arena_unittest.TestAllTypes.repeated_nested_enum', index=43,
+      number=51, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_foreign_enum', full_name='proto3_arena_unittest.TestAllTypes.repeated_foreign_enum', index=44,
+      number=52, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string_piece', full_name='proto3_arena_unittest.TestAllTypes.repeated_string_piece', index=45,
+      number=54, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_cord', full_name='proto3_arena_unittest.TestAllTypes.repeated_cord', index=46,
+      number=55, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\010\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_lazy_message', full_name='proto3_arena_unittest.TestAllTypes.repeated_lazy_message', index=47,
+      number=57, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'(\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_uint32', full_name='proto3_arena_unittest.TestAllTypes.oneof_uint32', index=48,
+      number=111, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_nested_message', full_name='proto3_arena_unittest.TestAllTypes.oneof_nested_message', index=49,
+      number=112, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_string', full_name='proto3_arena_unittest.TestAllTypes.oneof_string', index=50,
+      number=113, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_bytes', full_name='proto3_arena_unittest.TestAllTypes.oneof_bytes', index=51,
+      number=114, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTALLTYPES_NESTEDMESSAGE, ],
+  enum_types=[
+    _TESTALLTYPES_NESTEDENUM,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='oneof_field', full_name='proto3_arena_unittest.TestAllTypes.oneof_field',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=110,
+  serialized_end=2359,
+)
+
+
+_TESTPACKEDTYPES = _descriptor.Descriptor(
+  name='TestPackedTypes',
+  full_name='proto3_arena_unittest.TestPackedTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='packed_int32', full_name='proto3_arena_unittest.TestPackedTypes.packed_int32', index=0,
+      number=90, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_int64', full_name='proto3_arena_unittest.TestPackedTypes.packed_int64', index=1,
+      number=91, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_uint32', full_name='proto3_arena_unittest.TestPackedTypes.packed_uint32', index=2,
+      number=92, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_uint64', full_name='proto3_arena_unittest.TestPackedTypes.packed_uint64', index=3,
+      number=93, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sint32', full_name='proto3_arena_unittest.TestPackedTypes.packed_sint32', index=4,
+      number=94, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sint64', full_name='proto3_arena_unittest.TestPackedTypes.packed_sint64', index=5,
+      number=95, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_fixed32', full_name='proto3_arena_unittest.TestPackedTypes.packed_fixed32', index=6,
+      number=96, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_fixed64', full_name='proto3_arena_unittest.TestPackedTypes.packed_fixed64', index=7,
+      number=97, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sfixed32', full_name='proto3_arena_unittest.TestPackedTypes.packed_sfixed32', index=8,
+      number=98, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_sfixed64', full_name='proto3_arena_unittest.TestPackedTypes.packed_sfixed64', index=9,
+      number=99, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_float', full_name='proto3_arena_unittest.TestPackedTypes.packed_float', index=10,
+      number=100, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_double', full_name='proto3_arena_unittest.TestPackedTypes.packed_double', index=11,
+      number=101, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_bool', full_name='proto3_arena_unittest.TestPackedTypes.packed_bool', index=12,
+      number=102, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='packed_enum', full_name='proto3_arena_unittest.TestPackedTypes.packed_enum', index=13,
+      number=103, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\001', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2362,
+  serialized_end=2792,
+)
+
+
+_TESTUNPACKEDTYPES = _descriptor.Descriptor(
+  name='TestUnpackedTypes',
+  full_name='proto3_arena_unittest.TestUnpackedTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='repeated_int32', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_int32', index=0,
+      number=1, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_int64', index=1,
+      number=2, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint32', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_uint32', index=2,
+      number=3, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint64', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_uint64', index=3,
+      number=4, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint32', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_sint32', index=4,
+      number=5, type=17, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sint64', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_sint64', index=5,
+      number=6, type=18, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed32', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_fixed32', index=6,
+      number=7, type=7, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_fixed64', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_fixed64', index=7,
+      number=8, type=6, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed32', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_sfixed32', index=8,
+      number=9, type=15, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_sfixed64', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_sfixed64', index=9,
+      number=10, type=16, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_float', index=10,
+      number=11, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_double', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_double', index=11,
+      number=12, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bool', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_bool', index=12,
+      number=13, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_nested_enum', full_name='proto3_arena_unittest.TestUnpackedTypes.repeated_nested_enum', index=13,
+      number=14, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\020\000', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2795,
+  serialized_end=3274,
+)
+
+
+_NESTEDTESTALLTYPES = _descriptor.Descriptor(
+  name='NestedTestAllTypes',
+  full_name='proto3_arena_unittest.NestedTestAllTypes',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='child', full_name='proto3_arena_unittest.NestedTestAllTypes.child', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='payload', full_name='proto3_arena_unittest.NestedTestAllTypes.payload', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_child', full_name='proto3_arena_unittest.NestedTestAllTypes.repeated_child', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3277,
+  serialized_end=3476,
+)
+
+
+_FOREIGNMESSAGE = _descriptor.Descriptor(
+  name='ForeignMessage',
+  full_name='proto3_arena_unittest.ForeignMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='c', full_name='proto3_arena_unittest.ForeignMessage.c', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3478,
+  serialized_end=3505,
+)
+
+
+_TESTEMPTYMESSAGE = _descriptor.Descriptor(
+  name='TestEmptyMessage',
+  full_name='proto3_arena_unittest.TestEmptyMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3507,
+  serialized_end=3525,
+)
+
+
+_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE_NESTEDNESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedNestedMessage',
+  full_name='proto3_arena_unittest.TestPickleNestedMessage.NestedMessage.NestedNestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='cc', full_name='proto3_arena_unittest.TestPickleNestedMessage.NestedMessage.NestedNestedMessage.cc', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3583,
+  serialized_end=3616,
+)
+
+_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE = _descriptor.Descriptor(
+  name='NestedMessage',
+  full_name='proto3_arena_unittest.TestPickleNestedMessage.NestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bb', full_name='proto3_arena_unittest.TestPickleNestedMessage.NestedMessage.bb', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE_NESTEDNESTEDMESSAGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3554,
+  serialized_end=3616,
+)
+
+_TESTPICKLENESTEDMESSAGE = _descriptor.Descriptor(
+  name='TestPickleNestedMessage',
+  full_name='proto3_arena_unittest.TestPickleNestedMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3527,
+  serialized_end=3616,
+)
+
+_TESTALLTYPES_NESTEDMESSAGE.containing_type = _TESTALLTYPES
+_TESTALLTYPES.fields_by_name['optional_nested_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES.fields_by_name['optional_foreign_message'].message_type = _FOREIGNMESSAGE
+_TESTALLTYPES.fields_by_name['optional_import_message'].message_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTMESSAGE
+_TESTALLTYPES.fields_by_name['optional_nested_enum'].enum_type = _TESTALLTYPES_NESTEDENUM
+_TESTALLTYPES.fields_by_name['optional_foreign_enum'].enum_type = _FOREIGNENUM
+_TESTALLTYPES.fields_by_name['optional_public_import_message'].message_type = google_dot_protobuf_dot_unittest__import__public__pb2._PUBLICIMPORTMESSAGE
+_TESTALLTYPES.fields_by_name['optional_lazy_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES.fields_by_name['optional_lazy_import_message'].message_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTMESSAGE
+_TESTALLTYPES.fields_by_name['repeated_nested_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES.fields_by_name['repeated_foreign_message'].message_type = _FOREIGNMESSAGE
+_TESTALLTYPES.fields_by_name['repeated_import_message'].message_type = google_dot_protobuf_dot_unittest__import__pb2._IMPORTMESSAGE
+_TESTALLTYPES.fields_by_name['repeated_nested_enum'].enum_type = _TESTALLTYPES_NESTEDENUM
+_TESTALLTYPES.fields_by_name['repeated_foreign_enum'].enum_type = _FOREIGNENUM
+_TESTALLTYPES.fields_by_name['repeated_lazy_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES.fields_by_name['oneof_nested_message'].message_type = _TESTALLTYPES_NESTEDMESSAGE
+_TESTALLTYPES_NESTEDENUM.containing_type = _TESTALLTYPES
+_TESTALLTYPES.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPES.fields_by_name['oneof_uint32'])
+_TESTALLTYPES.fields_by_name['oneof_uint32'].containing_oneof = _TESTALLTYPES.oneofs_by_name['oneof_field']
+_TESTALLTYPES.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPES.fields_by_name['oneof_nested_message'])
+_TESTALLTYPES.fields_by_name['oneof_nested_message'].containing_oneof = _TESTALLTYPES.oneofs_by_name['oneof_field']
+_TESTALLTYPES.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPES.fields_by_name['oneof_string'])
+_TESTALLTYPES.fields_by_name['oneof_string'].containing_oneof = _TESTALLTYPES.oneofs_by_name['oneof_field']
+_TESTALLTYPES.oneofs_by_name['oneof_field'].fields.append(
+  _TESTALLTYPES.fields_by_name['oneof_bytes'])
+_TESTALLTYPES.fields_by_name['oneof_bytes'].containing_oneof = _TESTALLTYPES.oneofs_by_name['oneof_field']
+_TESTPACKEDTYPES.fields_by_name['packed_enum'].enum_type = _FOREIGNENUM
+_TESTUNPACKEDTYPES.fields_by_name['repeated_nested_enum'].enum_type = _TESTALLTYPES_NESTEDENUM
+_NESTEDTESTALLTYPES.fields_by_name['child'].message_type = _NESTEDTESTALLTYPES
+_NESTEDTESTALLTYPES.fields_by_name['payload'].message_type = _TESTALLTYPES
+_NESTEDTESTALLTYPES.fields_by_name['repeated_child'].message_type = _NESTEDTESTALLTYPES
+_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE_NESTEDNESTEDMESSAGE.containing_type = _TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE
+_TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE.containing_type = _TESTPICKLENESTEDMESSAGE
+DESCRIPTOR.message_types_by_name['TestAllTypes'] = _TESTALLTYPES
+DESCRIPTOR.message_types_by_name['TestPackedTypes'] = _TESTPACKEDTYPES
+DESCRIPTOR.message_types_by_name['TestUnpackedTypes'] = _TESTUNPACKEDTYPES
+DESCRIPTOR.message_types_by_name['NestedTestAllTypes'] = _NESTEDTESTALLTYPES
+DESCRIPTOR.message_types_by_name['ForeignMessage'] = _FOREIGNMESSAGE
+DESCRIPTOR.message_types_by_name['TestEmptyMessage'] = _TESTEMPTYMESSAGE
+DESCRIPTOR.message_types_by_name['TestPickleNestedMessage'] = _TESTPICKLENESTEDMESSAGE
+DESCRIPTOR.enum_types_by_name['ForeignEnum'] = _FOREIGNENUM
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestAllTypes = _reflection.GeneratedProtocolMessageType('TestAllTypes', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+    'DESCRIPTOR' : _TESTALLTYPES_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.unittest_proto3_arena_pb2'
+    # @@protoc_insertion_point(class_scope:proto3_arena_unittest.TestAllTypes.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _TESTALLTYPES,
+  '__module__' : 'google.protobuf.unittest_proto3_arena_pb2'
+  # @@protoc_insertion_point(class_scope:proto3_arena_unittest.TestAllTypes)
+  })
+_sym_db.RegisterMessage(TestAllTypes)
+_sym_db.RegisterMessage(TestAllTypes.NestedMessage)
+
+TestPackedTypes = _reflection.GeneratedProtocolMessageType('TestPackedTypes', (_message.Message,), {
+  'DESCRIPTOR' : _TESTPACKEDTYPES,
+  '__module__' : 'google.protobuf.unittest_proto3_arena_pb2'
+  # @@protoc_insertion_point(class_scope:proto3_arena_unittest.TestPackedTypes)
+  })
+_sym_db.RegisterMessage(TestPackedTypes)
+
+TestUnpackedTypes = _reflection.GeneratedProtocolMessageType('TestUnpackedTypes', (_message.Message,), {
+  'DESCRIPTOR' : _TESTUNPACKEDTYPES,
+  '__module__' : 'google.protobuf.unittest_proto3_arena_pb2'
+  # @@protoc_insertion_point(class_scope:proto3_arena_unittest.TestUnpackedTypes)
+  })
+_sym_db.RegisterMessage(TestUnpackedTypes)
+
+NestedTestAllTypes = _reflection.GeneratedProtocolMessageType('NestedTestAllTypes', (_message.Message,), {
+  'DESCRIPTOR' : _NESTEDTESTALLTYPES,
+  '__module__' : 'google.protobuf.unittest_proto3_arena_pb2'
+  # @@protoc_insertion_point(class_scope:proto3_arena_unittest.NestedTestAllTypes)
+  })
+_sym_db.RegisterMessage(NestedTestAllTypes)
+
+ForeignMessage = _reflection.GeneratedProtocolMessageType('ForeignMessage', (_message.Message,), {
+  'DESCRIPTOR' : _FOREIGNMESSAGE,
+  '__module__' : 'google.protobuf.unittest_proto3_arena_pb2'
+  # @@protoc_insertion_point(class_scope:proto3_arena_unittest.ForeignMessage)
+  })
+_sym_db.RegisterMessage(ForeignMessage)
+
+TestEmptyMessage = _reflection.GeneratedProtocolMessageType('TestEmptyMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTEMPTYMESSAGE,
+  '__module__' : 'google.protobuf.unittest_proto3_arena_pb2'
+  # @@protoc_insertion_point(class_scope:proto3_arena_unittest.TestEmptyMessage)
+  })
+_sym_db.RegisterMessage(TestEmptyMessage)
+
+TestPickleNestedMessage = _reflection.GeneratedProtocolMessageType('TestPickleNestedMessage', (_message.Message,), {
+
+  'NestedMessage' : _reflection.GeneratedProtocolMessageType('NestedMessage', (_message.Message,), {
+
+    'NestedNestedMessage' : _reflection.GeneratedProtocolMessageType('NestedNestedMessage', (_message.Message,), {
+      'DESCRIPTOR' : _TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE_NESTEDNESTEDMESSAGE,
+      '__module__' : 'google.protobuf.unittest_proto3_arena_pb2'
+      # @@protoc_insertion_point(class_scope:proto3_arena_unittest.TestPickleNestedMessage.NestedMessage.NestedNestedMessage)
+      })
+    ,
+    'DESCRIPTOR' : _TESTPICKLENESTEDMESSAGE_NESTEDMESSAGE,
+    '__module__' : 'google.protobuf.unittest_proto3_arena_pb2'
+    # @@protoc_insertion_point(class_scope:proto3_arena_unittest.TestPickleNestedMessage.NestedMessage)
+    })
+  ,
+  'DESCRIPTOR' : _TESTPICKLENESTEDMESSAGE,
+  '__module__' : 'google.protobuf.unittest_proto3_arena_pb2'
+  # @@protoc_insertion_point(class_scope:proto3_arena_unittest.TestPickleNestedMessage)
+  })
+_sym_db.RegisterMessage(TestPickleNestedMessage)
+_sym_db.RegisterMessage(TestPickleNestedMessage.NestedMessage)
+_sym_db.RegisterMessage(TestPickleNestedMessage.NestedMessage.NestedNestedMessage)
+
+
+DESCRIPTOR._options = None
+_TESTALLTYPES.fields_by_name['optional_string_piece']._options = None
+_TESTALLTYPES.fields_by_name['optional_cord']._options = None
+_TESTALLTYPES.fields_by_name['optional_lazy_message']._options = None
+_TESTALLTYPES.fields_by_name['optional_lazy_import_message']._options = None
+_TESTALLTYPES.fields_by_name['repeated_string_piece']._options = None
+_TESTALLTYPES.fields_by_name['repeated_cord']._options = None
+_TESTALLTYPES.fields_by_name['repeated_lazy_message']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_int32']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_int64']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_uint32']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_uint64']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_sint32']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_sint64']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_fixed32']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_fixed64']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_sfixed32']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_sfixed64']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_float']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_double']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_bool']._options = None
+_TESTPACKEDTYPES.fields_by_name['packed_enum']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_int32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_int64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_uint32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_uint64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_sint32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_sint64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_fixed32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_fixed64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_sfixed32']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_sfixed64']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_float']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_double']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_bool']._options = None
+_TESTUNPACKEDTYPES.fields_by_name['repeated_nested_enum']._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/__init__.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/__pycache__/json_format_pb2.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/__pycache__/json_format_pb2.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/__pycache__/json_format_proto3_pb2.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/__pycache__/json_format_proto3_pb2.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/json_format_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/json_format_pb2.py
new file mode 100644
index 0000000..72be160
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/json_format_pb2.py
@@ -0,0 +1,983 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/util/json_format.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/util/json_format.proto',
+  package='protobuf_unittest',
+  syntax='proto2',
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n&google/protobuf/util/json_format.proto\x12\x11protobuf_unittest\"\x89\x01\n\x13TestFlagsAndStrings\x12\t\n\x01\x41\x18\x01 \x02(\x05\x12K\n\rrepeatedgroup\x18\x02 \x03(\n24.protobuf_unittest.TestFlagsAndStrings.RepeatedGroup\x1a\x1a\n\rRepeatedGroup\x12\t\n\x01\x66\x18\x03 \x02(\t\"!\n\x14TestBase64ByteArrays\x12\t\n\x01\x61\x18\x01 \x02(\x0c\"G\n\x12TestJavaScriptJSON\x12\t\n\x01\x61\x18\x01 \x01(\x05\x12\r\n\x05\x66inal\x18\x02 \x01(\x02\x12\n\n\x02in\x18\x03 \x01(\t\x12\x0b\n\x03Var\x18\x04 \x01(\t\"Q\n\x18TestJavaScriptOrderJSON1\x12\t\n\x01\x64\x18\x01 \x01(\x05\x12\t\n\x01\x63\x18\x02 \x01(\x05\x12\t\n\x01x\x18\x03 \x01(\x08\x12\t\n\x01\x62\x18\x04 \x01(\x05\x12\t\n\x01\x61\x18\x05 \x01(\x05\"\x89\x01\n\x18TestJavaScriptOrderJSON2\x12\t\n\x01\x64\x18\x01 \x01(\x05\x12\t\n\x01\x63\x18\x02 \x01(\x05\x12\t\n\x01x\x18\x03 \x01(\x08\x12\t\n\x01\x62\x18\x04 \x01(\x05\x12\t\n\x01\x61\x18\x05 \x01(\x05\x12\x36\n\x01z\x18\x06 \x03(\x0b\x32+.protobuf_unittest.TestJavaScriptOrderJSON1\"$\n\x0cTestLargeInt\x12\t\n\x01\x61\x18\x01 \x02(\x03\x12\t\n\x01\x62\x18\x02 \x02(\x04\"\xa0\x01\n\x0bTestNumbers\x12\x30\n\x01\x61\x18\x01 \x01(\x0e\x32%.protobuf_unittest.TestNumbers.MyType\x12\t\n\x01\x62\x18\x02 \x01(\x05\x12\t\n\x01\x63\x18\x03 \x01(\x02\x12\t\n\x01\x64\x18\x04 \x01(\x08\x12\t\n\x01\x65\x18\x05 \x01(\x01\x12\t\n\x01\x66\x18\x06 \x01(\r\"(\n\x06MyType\x12\x06\n\x02OK\x10\x00\x12\x0b\n\x07WARNING\x10\x01\x12\t\n\x05\x45RROR\x10\x02\"T\n\rTestCamelCase\x12\x14\n\x0cnormal_field\x18\x01 \x01(\t\x12\x15\n\rCAPITAL_FIELD\x18\x02 \x01(\x05\x12\x16\n\x0e\x43\x61melCaseField\x18\x03 \x01(\x05\"|\n\x0bTestBoolMap\x12=\n\x08\x62ool_map\x18\x01 \x03(\x0b\x32+.protobuf_unittest.TestBoolMap.BoolMapEntry\x1a.\n\x0c\x42oolMapEntry\x12\x0b\n\x03key\x18\x01 \x01(\x08\x12\r\n\x05value\x18\x02 \x01(\x05:\x02\x38\x01\"O\n\rTestRecursion\x12\r\n\x05value\x18\x01 \x01(\x05\x12/\n\x05\x63hild\x18\x02 \x01(\x0b\x32 .protobuf_unittest.TestRecursion\"\x86\x01\n\rTestStringMap\x12\x43\n\nstring_map\x18\x01 \x03(\x0b\x32/.protobuf_unittest.TestStringMap.StringMapEntry\x1a\x30\n\x0eStringMapEntry\x12\x0b\n\x03key\x18\x01 \x01(\t\x12\r\n\x05value\x18\x02 \x01(\t:\x02\x38\x01\"\xc4\x01\n\x14TestStringSerializer\x12\x15\n\rscalar_string\x18\x01 \x01(\t\x12\x17\n\x0frepeated_string\x18\x02 \x03(\t\x12J\n\nstring_map\x18\x03 \x03(\x0b\x32\x36.protobuf_unittest.TestStringSerializer.StringMapEntry\x1a\x30\n\x0eStringMapEntry\x12\x0b\n\x03key\x18\x01 \x01(\t\x12\r\n\x05value\x18\x02 \x01(\t:\x02\x38\x01\"$\n\x18TestMessageWithExtension*\x08\x08\x64\x10\x80\x80\x80\x80\x02\"z\n\rTestExtension\x12\r\n\x05value\x18\x01 \x01(\t2Z\n\x03\x65xt\x12+.protobuf_unittest.TestMessageWithExtension\x18\x64 \x01(\x0b\x32 .protobuf_unittest.TestExtension'
+)
+
+
+
+_TESTNUMBERS_MYTYPE = _descriptor.EnumDescriptor(
+  name='MyType',
+  full_name='protobuf_unittest.TestNumbers.MyType',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='OK', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='WARNING', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='ERROR', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=691,
+  serialized_end=731,
+)
+_sym_db.RegisterEnumDescriptor(_TESTNUMBERS_MYTYPE)
+
+
+_TESTFLAGSANDSTRINGS_REPEATEDGROUP = _descriptor.Descriptor(
+  name='RepeatedGroup',
+  full_name='protobuf_unittest.TestFlagsAndStrings.RepeatedGroup',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='f', full_name='protobuf_unittest.TestFlagsAndStrings.RepeatedGroup.f', index=0,
+      number=3, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=173,
+  serialized_end=199,
+)
+
+_TESTFLAGSANDSTRINGS = _descriptor.Descriptor(
+  name='TestFlagsAndStrings',
+  full_name='protobuf_unittest.TestFlagsAndStrings',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='A', full_name='protobuf_unittest.TestFlagsAndStrings.A', index=0,
+      number=1, type=5, cpp_type=1, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeatedgroup', full_name='protobuf_unittest.TestFlagsAndStrings.repeatedgroup', index=1,
+      number=2, type=10, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTFLAGSANDSTRINGS_REPEATEDGROUP, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=62,
+  serialized_end=199,
+)
+
+
+_TESTBASE64BYTEARRAYS = _descriptor.Descriptor(
+  name='TestBase64ByteArrays',
+  full_name='protobuf_unittest.TestBase64ByteArrays',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestBase64ByteArrays.a', index=0,
+      number=1, type=12, cpp_type=9, label=2,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=201,
+  serialized_end=234,
+)
+
+
+_TESTJAVASCRIPTJSON = _descriptor.Descriptor(
+  name='TestJavaScriptJSON',
+  full_name='protobuf_unittest.TestJavaScriptJSON',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestJavaScriptJSON.a', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='final', full_name='protobuf_unittest.TestJavaScriptJSON.final', index=1,
+      number=2, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='in', full_name='protobuf_unittest.TestJavaScriptJSON.in', index=2,
+      number=3, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='Var', full_name='protobuf_unittest.TestJavaScriptJSON.Var', index=3,
+      number=4, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=236,
+  serialized_end=307,
+)
+
+
+_TESTJAVASCRIPTORDERJSON1 = _descriptor.Descriptor(
+  name='TestJavaScriptOrderJSON1',
+  full_name='protobuf_unittest.TestJavaScriptOrderJSON1',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='d', full_name='protobuf_unittest.TestJavaScriptOrderJSON1.d', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='c', full_name='protobuf_unittest.TestJavaScriptOrderJSON1.c', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='x', full_name='protobuf_unittest.TestJavaScriptOrderJSON1.x', index=2,
+      number=3, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='b', full_name='protobuf_unittest.TestJavaScriptOrderJSON1.b', index=3,
+      number=4, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestJavaScriptOrderJSON1.a', index=4,
+      number=5, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=309,
+  serialized_end=390,
+)
+
+
+_TESTJAVASCRIPTORDERJSON2 = _descriptor.Descriptor(
+  name='TestJavaScriptOrderJSON2',
+  full_name='protobuf_unittest.TestJavaScriptOrderJSON2',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='d', full_name='protobuf_unittest.TestJavaScriptOrderJSON2.d', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='c', full_name='protobuf_unittest.TestJavaScriptOrderJSON2.c', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='x', full_name='protobuf_unittest.TestJavaScriptOrderJSON2.x', index=2,
+      number=3, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='b', full_name='protobuf_unittest.TestJavaScriptOrderJSON2.b', index=3,
+      number=4, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestJavaScriptOrderJSON2.a', index=4,
+      number=5, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='z', full_name='protobuf_unittest.TestJavaScriptOrderJSON2.z', index=5,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=393,
+  serialized_end=530,
+)
+
+
+_TESTLARGEINT = _descriptor.Descriptor(
+  name='TestLargeInt',
+  full_name='protobuf_unittest.TestLargeInt',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestLargeInt.a', index=0,
+      number=1, type=3, cpp_type=2, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='b', full_name='protobuf_unittest.TestLargeInt.b', index=1,
+      number=2, type=4, cpp_type=4, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=532,
+  serialized_end=568,
+)
+
+
+_TESTNUMBERS = _descriptor.Descriptor(
+  name='TestNumbers',
+  full_name='protobuf_unittest.TestNumbers',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='a', full_name='protobuf_unittest.TestNumbers.a', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='b', full_name='protobuf_unittest.TestNumbers.b', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='c', full_name='protobuf_unittest.TestNumbers.c', index=2,
+      number=3, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='d', full_name='protobuf_unittest.TestNumbers.d', index=3,
+      number=4, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='e', full_name='protobuf_unittest.TestNumbers.e', index=4,
+      number=5, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='f', full_name='protobuf_unittest.TestNumbers.f', index=5,
+      number=6, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _TESTNUMBERS_MYTYPE,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=571,
+  serialized_end=731,
+)
+
+
+_TESTCAMELCASE = _descriptor.Descriptor(
+  name='TestCamelCase',
+  full_name='protobuf_unittest.TestCamelCase',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='normal_field', full_name='protobuf_unittest.TestCamelCase.normal_field', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='CAPITAL_FIELD', full_name='protobuf_unittest.TestCamelCase.CAPITAL_FIELD', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='CamelCaseField', full_name='protobuf_unittest.TestCamelCase.CamelCaseField', index=2,
+      number=3, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=733,
+  serialized_end=817,
+)
+
+
+_TESTBOOLMAP_BOOLMAPENTRY = _descriptor.Descriptor(
+  name='BoolMapEntry',
+  full_name='protobuf_unittest.TestBoolMap.BoolMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestBoolMap.BoolMapEntry.key', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestBoolMap.BoolMapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=897,
+  serialized_end=943,
+)
+
+_TESTBOOLMAP = _descriptor.Descriptor(
+  name='TestBoolMap',
+  full_name='protobuf_unittest.TestBoolMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bool_map', full_name='protobuf_unittest.TestBoolMap.bool_map', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTBOOLMAP_BOOLMAPENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=819,
+  serialized_end=943,
+)
+
+
+_TESTRECURSION = _descriptor.Descriptor(
+  name='TestRecursion',
+  full_name='protobuf_unittest.TestRecursion',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestRecursion.value', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='child', full_name='protobuf_unittest.TestRecursion.child', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=945,
+  serialized_end=1024,
+)
+
+
+_TESTSTRINGMAP_STRINGMAPENTRY = _descriptor.Descriptor(
+  name='StringMapEntry',
+  full_name='protobuf_unittest.TestStringMap.StringMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestStringMap.StringMapEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestStringMap.StringMapEntry.value', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1113,
+  serialized_end=1161,
+)
+
+_TESTSTRINGMAP = _descriptor.Descriptor(
+  name='TestStringMap',
+  full_name='protobuf_unittest.TestStringMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='string_map', full_name='protobuf_unittest.TestStringMap.string_map', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTSTRINGMAP_STRINGMAPENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1027,
+  serialized_end=1161,
+)
+
+
+_TESTSTRINGSERIALIZER_STRINGMAPENTRY = _descriptor.Descriptor(
+  name='StringMapEntry',
+  full_name='protobuf_unittest.TestStringSerializer.StringMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='protobuf_unittest.TestStringSerializer.StringMapEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestStringSerializer.StringMapEntry.value', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1113,
+  serialized_end=1161,
+)
+
+_TESTSTRINGSERIALIZER = _descriptor.Descriptor(
+  name='TestStringSerializer',
+  full_name='protobuf_unittest.TestStringSerializer',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='scalar_string', full_name='protobuf_unittest.TestStringSerializer.scalar_string', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string', full_name='protobuf_unittest.TestStringSerializer.repeated_string', index=1,
+      number=2, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_map', full_name='protobuf_unittest.TestStringSerializer.string_map', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTSTRINGSERIALIZER_STRINGMAPENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1164,
+  serialized_end=1360,
+)
+
+
+_TESTMESSAGEWITHEXTENSION = _descriptor.Descriptor(
+  name='TestMessageWithExtension',
+  full_name='protobuf_unittest.TestMessageWithExtension',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=True,
+  syntax='proto2',
+  extension_ranges=[(100, 536870912), ],
+  oneofs=[
+  ],
+  serialized_start=1362,
+  serialized_end=1398,
+)
+
+
+_TESTEXTENSION = _descriptor.Descriptor(
+  name='TestExtension',
+  full_name='protobuf_unittest.TestExtension',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='protobuf_unittest.TestExtension.value', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+    _descriptor.FieldDescriptor(
+      name='ext', full_name='protobuf_unittest.TestExtension.ext', index=0,
+      number=100, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=True, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1400,
+  serialized_end=1522,
+)
+
+_TESTFLAGSANDSTRINGS_REPEATEDGROUP.containing_type = _TESTFLAGSANDSTRINGS
+_TESTFLAGSANDSTRINGS.fields_by_name['repeatedgroup'].message_type = _TESTFLAGSANDSTRINGS_REPEATEDGROUP
+_TESTJAVASCRIPTORDERJSON2.fields_by_name['z'].message_type = _TESTJAVASCRIPTORDERJSON1
+_TESTNUMBERS.fields_by_name['a'].enum_type = _TESTNUMBERS_MYTYPE
+_TESTNUMBERS_MYTYPE.containing_type = _TESTNUMBERS
+_TESTBOOLMAP_BOOLMAPENTRY.containing_type = _TESTBOOLMAP
+_TESTBOOLMAP.fields_by_name['bool_map'].message_type = _TESTBOOLMAP_BOOLMAPENTRY
+_TESTRECURSION.fields_by_name['child'].message_type = _TESTRECURSION
+_TESTSTRINGMAP_STRINGMAPENTRY.containing_type = _TESTSTRINGMAP
+_TESTSTRINGMAP.fields_by_name['string_map'].message_type = _TESTSTRINGMAP_STRINGMAPENTRY
+_TESTSTRINGSERIALIZER_STRINGMAPENTRY.containing_type = _TESTSTRINGSERIALIZER
+_TESTSTRINGSERIALIZER.fields_by_name['string_map'].message_type = _TESTSTRINGSERIALIZER_STRINGMAPENTRY
+DESCRIPTOR.message_types_by_name['TestFlagsAndStrings'] = _TESTFLAGSANDSTRINGS
+DESCRIPTOR.message_types_by_name['TestBase64ByteArrays'] = _TESTBASE64BYTEARRAYS
+DESCRIPTOR.message_types_by_name['TestJavaScriptJSON'] = _TESTJAVASCRIPTJSON
+DESCRIPTOR.message_types_by_name['TestJavaScriptOrderJSON1'] = _TESTJAVASCRIPTORDERJSON1
+DESCRIPTOR.message_types_by_name['TestJavaScriptOrderJSON2'] = _TESTJAVASCRIPTORDERJSON2
+DESCRIPTOR.message_types_by_name['TestLargeInt'] = _TESTLARGEINT
+DESCRIPTOR.message_types_by_name['TestNumbers'] = _TESTNUMBERS
+DESCRIPTOR.message_types_by_name['TestCamelCase'] = _TESTCAMELCASE
+DESCRIPTOR.message_types_by_name['TestBoolMap'] = _TESTBOOLMAP
+DESCRIPTOR.message_types_by_name['TestRecursion'] = _TESTRECURSION
+DESCRIPTOR.message_types_by_name['TestStringMap'] = _TESTSTRINGMAP
+DESCRIPTOR.message_types_by_name['TestStringSerializer'] = _TESTSTRINGSERIALIZER
+DESCRIPTOR.message_types_by_name['TestMessageWithExtension'] = _TESTMESSAGEWITHEXTENSION
+DESCRIPTOR.message_types_by_name['TestExtension'] = _TESTEXTENSION
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+TestFlagsAndStrings = _reflection.GeneratedProtocolMessageType('TestFlagsAndStrings', (_message.Message,), {
+
+  'RepeatedGroup' : _reflection.GeneratedProtocolMessageType('RepeatedGroup', (_message.Message,), {
+    'DESCRIPTOR' : _TESTFLAGSANDSTRINGS_REPEATEDGROUP,
+    '__module__' : 'google.protobuf.util.json_format_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestFlagsAndStrings.RepeatedGroup)
+    })
+  ,
+  'DESCRIPTOR' : _TESTFLAGSANDSTRINGS,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestFlagsAndStrings)
+  })
+_sym_db.RegisterMessage(TestFlagsAndStrings)
+_sym_db.RegisterMessage(TestFlagsAndStrings.RepeatedGroup)
+
+TestBase64ByteArrays = _reflection.GeneratedProtocolMessageType('TestBase64ByteArrays', (_message.Message,), {
+  'DESCRIPTOR' : _TESTBASE64BYTEARRAYS,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestBase64ByteArrays)
+  })
+_sym_db.RegisterMessage(TestBase64ByteArrays)
+
+TestJavaScriptJSON = _reflection.GeneratedProtocolMessageType('TestJavaScriptJSON', (_message.Message,), {
+  'DESCRIPTOR' : _TESTJAVASCRIPTJSON,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestJavaScriptJSON)
+  })
+_sym_db.RegisterMessage(TestJavaScriptJSON)
+
+TestJavaScriptOrderJSON1 = _reflection.GeneratedProtocolMessageType('TestJavaScriptOrderJSON1', (_message.Message,), {
+  'DESCRIPTOR' : _TESTJAVASCRIPTORDERJSON1,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestJavaScriptOrderJSON1)
+  })
+_sym_db.RegisterMessage(TestJavaScriptOrderJSON1)
+
+TestJavaScriptOrderJSON2 = _reflection.GeneratedProtocolMessageType('TestJavaScriptOrderJSON2', (_message.Message,), {
+  'DESCRIPTOR' : _TESTJAVASCRIPTORDERJSON2,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestJavaScriptOrderJSON2)
+  })
+_sym_db.RegisterMessage(TestJavaScriptOrderJSON2)
+
+TestLargeInt = _reflection.GeneratedProtocolMessageType('TestLargeInt', (_message.Message,), {
+  'DESCRIPTOR' : _TESTLARGEINT,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestLargeInt)
+  })
+_sym_db.RegisterMessage(TestLargeInt)
+
+TestNumbers = _reflection.GeneratedProtocolMessageType('TestNumbers', (_message.Message,), {
+  'DESCRIPTOR' : _TESTNUMBERS,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestNumbers)
+  })
+_sym_db.RegisterMessage(TestNumbers)
+
+TestCamelCase = _reflection.GeneratedProtocolMessageType('TestCamelCase', (_message.Message,), {
+  'DESCRIPTOR' : _TESTCAMELCASE,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestCamelCase)
+  })
+_sym_db.RegisterMessage(TestCamelCase)
+
+TestBoolMap = _reflection.GeneratedProtocolMessageType('TestBoolMap', (_message.Message,), {
+
+  'BoolMapEntry' : _reflection.GeneratedProtocolMessageType('BoolMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTBOOLMAP_BOOLMAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestBoolMap.BoolMapEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTBOOLMAP,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestBoolMap)
+  })
+_sym_db.RegisterMessage(TestBoolMap)
+_sym_db.RegisterMessage(TestBoolMap.BoolMapEntry)
+
+TestRecursion = _reflection.GeneratedProtocolMessageType('TestRecursion', (_message.Message,), {
+  'DESCRIPTOR' : _TESTRECURSION,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestRecursion)
+  })
+_sym_db.RegisterMessage(TestRecursion)
+
+TestStringMap = _reflection.GeneratedProtocolMessageType('TestStringMap', (_message.Message,), {
+
+  'StringMapEntry' : _reflection.GeneratedProtocolMessageType('StringMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTSTRINGMAP_STRINGMAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestStringMap.StringMapEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTSTRINGMAP,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestStringMap)
+  })
+_sym_db.RegisterMessage(TestStringMap)
+_sym_db.RegisterMessage(TestStringMap.StringMapEntry)
+
+TestStringSerializer = _reflection.GeneratedProtocolMessageType('TestStringSerializer', (_message.Message,), {
+
+  'StringMapEntry' : _reflection.GeneratedProtocolMessageType('StringMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTSTRINGSERIALIZER_STRINGMAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_pb2'
+    # @@protoc_insertion_point(class_scope:protobuf_unittest.TestStringSerializer.StringMapEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTSTRINGSERIALIZER,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestStringSerializer)
+  })
+_sym_db.RegisterMessage(TestStringSerializer)
+_sym_db.RegisterMessage(TestStringSerializer.StringMapEntry)
+
+TestMessageWithExtension = _reflection.GeneratedProtocolMessageType('TestMessageWithExtension', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGEWITHEXTENSION,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestMessageWithExtension)
+  })
+_sym_db.RegisterMessage(TestMessageWithExtension)
+
+TestExtension = _reflection.GeneratedProtocolMessageType('TestExtension', (_message.Message,), {
+  'DESCRIPTOR' : _TESTEXTENSION,
+  '__module__' : 'google.protobuf.util.json_format_pb2'
+  # @@protoc_insertion_point(class_scope:protobuf_unittest.TestExtension)
+  })
+_sym_db.RegisterMessage(TestExtension)
+
+_TESTEXTENSION.extensions_by_name['ext'].message_type = _TESTEXTENSION
+TestMessageWithExtension.RegisterExtension(_TESTEXTENSION.extensions_by_name['ext'])
+
+_TESTBOOLMAP_BOOLMAPENTRY._options = None
+_TESTSTRINGMAP_STRINGMAPENTRY._options = None
+_TESTSTRINGSERIALIZER_STRINGMAPENTRY._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/json_format_proto3_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/json_format_proto3_pb2.py
new file mode 100644
index 0000000..d168401
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/util/json_format_proto3_pb2.py
@@ -0,0 +1,2020 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/util/json_format_proto3.proto
+"""Generated protocol buffer code."""
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.protobuf import any_pb2 as google_dot_protobuf_dot_any__pb2
+from google.protobuf import duration_pb2 as google_dot_protobuf_dot_duration__pb2
+from google.protobuf import field_mask_pb2 as google_dot_protobuf_dot_field__mask__pb2
+from google.protobuf import struct_pb2 as google_dot_protobuf_dot_struct__pb2
+from google.protobuf import timestamp_pb2 as google_dot_protobuf_dot_timestamp__pb2
+from google.protobuf import wrappers_pb2 as google_dot_protobuf_dot_wrappers__pb2
+from google.protobuf import unittest_pb2 as google_dot_protobuf_dot_unittest__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/util/json_format_proto3.proto',
+  package='proto3',
+  syntax='proto3',
+  serialized_options=b'\n\030com.google.protobuf.utilB\020JsonFormatProto3',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n-google/protobuf/util/json_format_proto3.proto\x12\x06proto3\x1a\x19google/protobuf/any.proto\x1a\x1egoogle/protobuf/duration.proto\x1a google/protobuf/field_mask.proto\x1a\x1cgoogle/protobuf/struct.proto\x1a\x1fgoogle/protobuf/timestamp.proto\x1a\x1egoogle/protobuf/wrappers.proto\x1a\x1egoogle/protobuf/unittest.proto\"\x1c\n\x0bMessageType\x12\r\n\x05value\x18\x01 \x01(\x05\"\x94\x05\n\x0bTestMessage\x12\x12\n\nbool_value\x18\x01 \x01(\x08\x12\x13\n\x0bint32_value\x18\x02 \x01(\x05\x12\x13\n\x0bint64_value\x18\x03 \x01(\x03\x12\x14\n\x0cuint32_value\x18\x04 \x01(\r\x12\x14\n\x0cuint64_value\x18\x05 \x01(\x04\x12\x13\n\x0b\x66loat_value\x18\x06 \x01(\x02\x12\x14\n\x0c\x64ouble_value\x18\x07 \x01(\x01\x12\x14\n\x0cstring_value\x18\x08 \x01(\t\x12\x13\n\x0b\x62ytes_value\x18\t \x01(\x0c\x12$\n\nenum_value\x18\n \x01(\x0e\x32\x10.proto3.EnumType\x12*\n\rmessage_value\x18\x0b \x01(\x0b\x32\x13.proto3.MessageType\x12\x1b\n\x13repeated_bool_value\x18\x15 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+  ,
+  dependencies=[google_dot_protobuf_dot_any__pb2.DESCRIPTOR,google_dot_protobuf_dot_duration__pb2.DESCRIPTOR,google_dot_protobuf_dot_field__mask__pb2.DESCRIPTOR,google_dot_protobuf_dot_struct__pb2.DESCRIPTOR,google_dot_protobuf_dot_timestamp__pb2.DESCRIPTOR,google_dot_protobuf_dot_wrappers__pb2.DESCRIPTOR,google_dot_protobuf_dot_unittest__pb2.DESCRIPTOR,])
+
+_ENUMTYPE = _descriptor.EnumDescriptor(
+  name='EnumType',
+  full_name='proto3.EnumType',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FOO', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='BAR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=4793,
+  serialized_end=4821,
+)
+_sym_db.RegisterEnumDescriptor(_ENUMTYPE)
+
+EnumType = enum_type_wrapper.EnumTypeWrapper(_ENUMTYPE)
+FOO = 0
+BAR = 1
+
+
+
+_MESSAGETYPE = _descriptor.Descriptor(
+  name='MessageType',
+  full_name='proto3.MessageType',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.MessageType.value', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=277,
+  serialized_end=305,
+)
+
+
+_TESTMESSAGE = _descriptor.Descriptor(
+  name='TestMessage',
+  full_name='proto3.TestMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bool_value', full_name='proto3.TestMessage.bool_value', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='int32_value', full_name='proto3.TestMessage.int32_value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='int64_value', full_name='proto3.TestMessage.int64_value', index=2,
+      number=3, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uint32_value', full_name='proto3.TestMessage.uint32_value', index=3,
+      number=4, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uint64_value', full_name='proto3.TestMessage.uint64_value', index=4,
+      number=5, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='float_value', full_name='proto3.TestMessage.float_value', index=5,
+      number=6, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='double_value', full_name='proto3.TestMessage.double_value', index=6,
+      number=7, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_value', full_name='proto3.TestMessage.string_value', index=7,
+      number=8, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bytes_value', full_name='proto3.TestMessage.bytes_value', index=8,
+      number=9, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='enum_value', full_name='proto3.TestMessage.enum_value', index=9,
+      number=10, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='message_value', full_name='proto3.TestMessage.message_value', index=10,
+      number=11, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bool_value', full_name='proto3.TestMessage.repeated_bool_value', index=11,
+      number=21, type=8, cpp_type=7, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int32_value', full_name='proto3.TestMessage.repeated_int32_value', index=12,
+      number=22, type=5, cpp_type=1, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64_value', full_name='proto3.TestMessage.repeated_int64_value', index=13,
+      number=23, type=3, cpp_type=2, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint32_value', full_name='proto3.TestMessage.repeated_uint32_value', index=14,
+      number=24, type=13, cpp_type=3, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint64_value', full_name='proto3.TestMessage.repeated_uint64_value', index=15,
+      number=25, type=4, cpp_type=4, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float_value', full_name='proto3.TestMessage.repeated_float_value', index=16,
+      number=26, type=2, cpp_type=6, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_double_value', full_name='proto3.TestMessage.repeated_double_value', index=17,
+      number=27, type=1, cpp_type=5, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string_value', full_name='proto3.TestMessage.repeated_string_value', index=18,
+      number=28, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bytes_value', full_name='proto3.TestMessage.repeated_bytes_value', index=19,
+      number=29, type=12, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_enum_value', full_name='proto3.TestMessage.repeated_enum_value', index=20,
+      number=30, type=14, cpp_type=8, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_message_value', full_name='proto3.TestMessage.repeated_message_value', index=21,
+      number=31, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=308,
+  serialized_end=968,
+)
+
+
+_TESTONEOF = _descriptor.Descriptor(
+  name='TestOneof',
+  full_name='proto3.TestOneof',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='oneof_int32_value', full_name='proto3.TestOneof.oneof_int32_value', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_string_value', full_name='proto3.TestOneof.oneof_string_value', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_bytes_value', full_name='proto3.TestOneof.oneof_bytes_value', index=2,
+      number=3, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_enum_value', full_name='proto3.TestOneof.oneof_enum_value', index=3,
+      number=4, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='oneof_message_value', full_name='proto3.TestOneof.oneof_message_value', index=4,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+    _descriptor.OneofDescriptor(
+      name='oneof_value', full_name='proto3.TestOneof.oneof_value',
+      index=0, containing_type=None,
+      create_key=_descriptor._internal_create_key,
+    fields=[]),
+  ],
+  serialized_start=971,
+  serialized_end=1183,
+)
+
+
+_TESTMAP_BOOLMAPENTRY = _descriptor.Descriptor(
+  name='BoolMapEntry',
+  full_name='proto3.TestMap.BoolMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestMap.BoolMapEntry.key', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestMap.BoolMapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1501,
+  serialized_end=1547,
+)
+
+_TESTMAP_INT32MAPENTRY = _descriptor.Descriptor(
+  name='Int32MapEntry',
+  full_name='proto3.TestMap.Int32MapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestMap.Int32MapEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestMap.Int32MapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1549,
+  serialized_end=1596,
+)
+
+_TESTMAP_INT64MAPENTRY = _descriptor.Descriptor(
+  name='Int64MapEntry',
+  full_name='proto3.TestMap.Int64MapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestMap.Int64MapEntry.key', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestMap.Int64MapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1598,
+  serialized_end=1645,
+)
+
+_TESTMAP_UINT32MAPENTRY = _descriptor.Descriptor(
+  name='Uint32MapEntry',
+  full_name='proto3.TestMap.Uint32MapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestMap.Uint32MapEntry.key', index=0,
+      number=1, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestMap.Uint32MapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1647,
+  serialized_end=1695,
+)
+
+_TESTMAP_UINT64MAPENTRY = _descriptor.Descriptor(
+  name='Uint64MapEntry',
+  full_name='proto3.TestMap.Uint64MapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestMap.Uint64MapEntry.key', index=0,
+      number=1, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestMap.Uint64MapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1697,
+  serialized_end=1745,
+)
+
+_TESTMAP_STRINGMAPENTRY = _descriptor.Descriptor(
+  name='StringMapEntry',
+  full_name='proto3.TestMap.StringMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestMap.StringMapEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestMap.StringMapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1747,
+  serialized_end=1795,
+)
+
+_TESTMAP = _descriptor.Descriptor(
+  name='TestMap',
+  full_name='proto3.TestMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bool_map', full_name='proto3.TestMap.bool_map', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='int32_map', full_name='proto3.TestMap.int32_map', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='int64_map', full_name='proto3.TestMap.int64_map', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uint32_map', full_name='proto3.TestMap.uint32_map', index=3,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uint64_map', full_name='proto3.TestMap.uint64_map', index=4,
+      number=5, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_map', full_name='proto3.TestMap.string_map', index=5,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTMAP_BOOLMAPENTRY, _TESTMAP_INT32MAPENTRY, _TESTMAP_INT64MAPENTRY, _TESTMAP_UINT32MAPENTRY, _TESTMAP_UINT64MAPENTRY, _TESTMAP_STRINGMAPENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1186,
+  serialized_end=1795,
+)
+
+
+_TESTNESTEDMAP_BOOLMAPENTRY = _descriptor.Descriptor(
+  name='BoolMapEntry',
+  full_name='proto3.TestNestedMap.BoolMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestNestedMap.BoolMapEntry.key', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestNestedMap.BoolMapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1501,
+  serialized_end=1547,
+)
+
+_TESTNESTEDMAP_INT32MAPENTRY = _descriptor.Descriptor(
+  name='Int32MapEntry',
+  full_name='proto3.TestNestedMap.Int32MapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestNestedMap.Int32MapEntry.key', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestNestedMap.Int32MapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1549,
+  serialized_end=1596,
+)
+
+_TESTNESTEDMAP_INT64MAPENTRY = _descriptor.Descriptor(
+  name='Int64MapEntry',
+  full_name='proto3.TestNestedMap.Int64MapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestNestedMap.Int64MapEntry.key', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestNestedMap.Int64MapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1598,
+  serialized_end=1645,
+)
+
+_TESTNESTEDMAP_UINT32MAPENTRY = _descriptor.Descriptor(
+  name='Uint32MapEntry',
+  full_name='proto3.TestNestedMap.Uint32MapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestNestedMap.Uint32MapEntry.key', index=0,
+      number=1, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestNestedMap.Uint32MapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1647,
+  serialized_end=1695,
+)
+
+_TESTNESTEDMAP_UINT64MAPENTRY = _descriptor.Descriptor(
+  name='Uint64MapEntry',
+  full_name='proto3.TestNestedMap.Uint64MapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestNestedMap.Uint64MapEntry.key', index=0,
+      number=1, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestNestedMap.Uint64MapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1697,
+  serialized_end=1745,
+)
+
+_TESTNESTEDMAP_STRINGMAPENTRY = _descriptor.Descriptor(
+  name='StringMapEntry',
+  full_name='proto3.TestNestedMap.StringMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestNestedMap.StringMapEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestNestedMap.StringMapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1747,
+  serialized_end=1795,
+)
+
+_TESTNESTEDMAP_MAPMAPENTRY = _descriptor.Descriptor(
+  name='MapMapEntry',
+  full_name='proto3.TestNestedMap.MapMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestNestedMap.MapMapEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestNestedMap.MapMapEntry.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2503,
+  serialized_end=2571,
+)
+
+_TESTNESTEDMAP = _descriptor.Descriptor(
+  name='TestNestedMap',
+  full_name='proto3.TestNestedMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bool_map', full_name='proto3.TestNestedMap.bool_map', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='int32_map', full_name='proto3.TestNestedMap.int32_map', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='int64_map', full_name='proto3.TestNestedMap.int64_map', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uint32_map', full_name='proto3.TestNestedMap.uint32_map', index=3,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uint64_map', full_name='proto3.TestNestedMap.uint64_map', index=4,
+      number=5, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_map', full_name='proto3.TestNestedMap.string_map', index=5,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='map_map', full_name='proto3.TestNestedMap.map_map', index=6,
+      number=7, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTNESTEDMAP_BOOLMAPENTRY, _TESTNESTEDMAP_INT32MAPENTRY, _TESTNESTEDMAP_INT64MAPENTRY, _TESTNESTEDMAP_UINT32MAPENTRY, _TESTNESTEDMAP_UINT64MAPENTRY, _TESTNESTEDMAP_STRINGMAPENTRY, _TESTNESTEDMAP_MAPMAPENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1798,
+  serialized_end=2571,
+)
+
+
+_TESTSTRINGMAP_STRINGMAPENTRY = _descriptor.Descriptor(
+  name='StringMapEntry',
+  full_name='proto3.TestStringMap.StringMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestStringMap.StringMapEntry.key', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestStringMap.StringMapEntry.value', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2648,
+  serialized_end=2696,
+)
+
+_TESTSTRINGMAP = _descriptor.Descriptor(
+  name='TestStringMap',
+  full_name='proto3.TestStringMap',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='string_map', full_name='proto3.TestStringMap.string_map', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTSTRINGMAP_STRINGMAPENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2573,
+  serialized_end=2696,
+)
+
+
+_TESTWRAPPER = _descriptor.Descriptor(
+  name='TestWrapper',
+  full_name='proto3.TestWrapper',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bool_value', full_name='proto3.TestWrapper.bool_value', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='int32_value', full_name='proto3.TestWrapper.int32_value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='int64_value', full_name='proto3.TestWrapper.int64_value', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uint32_value', full_name='proto3.TestWrapper.uint32_value', index=3,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='uint64_value', full_name='proto3.TestWrapper.uint64_value', index=4,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='float_value', full_name='proto3.TestWrapper.float_value', index=5,
+      number=6, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='double_value', full_name='proto3.TestWrapper.double_value', index=6,
+      number=7, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='string_value', full_name='proto3.TestWrapper.string_value', index=7,
+      number=8, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bytes_value', full_name='proto3.TestWrapper.bytes_value', index=8,
+      number=9, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bool_value', full_name='proto3.TestWrapper.repeated_bool_value', index=9,
+      number=11, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int32_value', full_name='proto3.TestWrapper.repeated_int32_value', index=10,
+      number=12, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_int64_value', full_name='proto3.TestWrapper.repeated_int64_value', index=11,
+      number=13, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint32_value', full_name='proto3.TestWrapper.repeated_uint32_value', index=12,
+      number=14, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_uint64_value', full_name='proto3.TestWrapper.repeated_uint64_value', index=13,
+      number=15, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_float_value', full_name='proto3.TestWrapper.repeated_float_value', index=14,
+      number=16, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_double_value', full_name='proto3.TestWrapper.repeated_double_value', index=15,
+      number=17, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_string_value', full_name='proto3.TestWrapper.repeated_string_value', index=16,
+      number=18, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_bytes_value', full_name='proto3.TestWrapper.repeated_bytes_value', index=17,
+      number=19, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2699,
+  serialized_end=3705,
+)
+
+
+_TESTTIMESTAMP = _descriptor.Descriptor(
+  name='TestTimestamp',
+  full_name='proto3.TestTimestamp',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestTimestamp.value', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_value', full_name='proto3.TestTimestamp.repeated_value', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3707,
+  serialized_end=3817,
+)
+
+
+_TESTDURATION = _descriptor.Descriptor(
+  name='TestDuration',
+  full_name='proto3.TestDuration',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestDuration.value', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_value', full_name='proto3.TestDuration.repeated_value', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3819,
+  serialized_end=3926,
+)
+
+
+_TESTFIELDMASK = _descriptor.Descriptor(
+  name='TestFieldMask',
+  full_name='proto3.TestFieldMask',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestFieldMask.value', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3928,
+  serialized_end=3986,
+)
+
+
+_TESTSTRUCT = _descriptor.Descriptor(
+  name='TestStruct',
+  full_name='proto3.TestStruct',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestStruct.value', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_value', full_name='proto3.TestStruct.repeated_value', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3988,
+  serialized_end=4089,
+)
+
+
+_TESTANY = _descriptor.Descriptor(
+  name='TestAny',
+  full_name='proto3.TestAny',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestAny.value', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_value', full_name='proto3.TestAny.repeated_value', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=4091,
+  serialized_end=4183,
+)
+
+
+_TESTVALUE = _descriptor.Descriptor(
+  name='TestValue',
+  full_name='proto3.TestValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestValue.value', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_value', full_name='proto3.TestValue.repeated_value', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=4185,
+  serialized_end=4283,
+)
+
+
+_TESTLISTVALUE = _descriptor.Descriptor(
+  name='TestListValue',
+  full_name='proto3.TestListValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestListValue.value', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='repeated_value', full_name='proto3.TestListValue.repeated_value', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=4285,
+  serialized_end=4395,
+)
+
+
+_TESTBOOLVALUE_BOOLMAPENTRY = _descriptor.Descriptor(
+  name='BoolMapEntry',
+  full_name='proto3.TestBoolValue.BoolMapEntry',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='proto3.TestBoolValue.BoolMapEntry.key', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestBoolValue.BoolMapEntry.value', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=b'8\001',
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1501,
+  serialized_end=1547,
+)
+
+_TESTBOOLVALUE = _descriptor.Descriptor(
+  name='TestBoolValue',
+  full_name='proto3.TestBoolValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='bool_value', full_name='proto3.TestBoolValue.bool_value', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='bool_map', full_name='proto3.TestBoolValue.bool_map', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[_TESTBOOLVALUE_BOOLMAPENTRY, ],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=4398,
+  serialized_end=4535,
+)
+
+
+_TESTCUSTOMJSONNAME = _descriptor.Descriptor(
+  name='TestCustomJsonName',
+  full_name='proto3.TestCustomJsonName',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='proto3.TestCustomJsonName.value', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, json_name='@value', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=4537,
+  serialized_end=4580,
+)
+
+
+_TESTEXTENSIONS = _descriptor.Descriptor(
+  name='TestExtensions',
+  full_name='proto3.TestExtensions',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='extensions', full_name='proto3.TestExtensions.extensions', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=4582,
+  serialized_end=4656,
+)
+
+
+_TESTENUMVALUE = _descriptor.Descriptor(
+  name='TestEnumValue',
+  full_name='proto3.TestEnumValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='enum_value1', full_name='proto3.TestEnumValue.enum_value1', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='enum_value2', full_name='proto3.TestEnumValue.enum_value2', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='enum_value3', full_name='proto3.TestEnumValue.enum_value3', index=2,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=4659,
+  serialized_end=4791,
+)
+
+_TESTMESSAGE.fields_by_name['enum_value'].enum_type = _ENUMTYPE
+_TESTMESSAGE.fields_by_name['message_value'].message_type = _MESSAGETYPE
+_TESTMESSAGE.fields_by_name['repeated_enum_value'].enum_type = _ENUMTYPE
+_TESTMESSAGE.fields_by_name['repeated_message_value'].message_type = _MESSAGETYPE
+_TESTONEOF.fields_by_name['oneof_enum_value'].enum_type = _ENUMTYPE
+_TESTONEOF.fields_by_name['oneof_message_value'].message_type = _MESSAGETYPE
+_TESTONEOF.oneofs_by_name['oneof_value'].fields.append(
+  _TESTONEOF.fields_by_name['oneof_int32_value'])
+_TESTONEOF.fields_by_name['oneof_int32_value'].containing_oneof = _TESTONEOF.oneofs_by_name['oneof_value']
+_TESTONEOF.oneofs_by_name['oneof_value'].fields.append(
+  _TESTONEOF.fields_by_name['oneof_string_value'])
+_TESTONEOF.fields_by_name['oneof_string_value'].containing_oneof = _TESTONEOF.oneofs_by_name['oneof_value']
+_TESTONEOF.oneofs_by_name['oneof_value'].fields.append(
+  _TESTONEOF.fields_by_name['oneof_bytes_value'])
+_TESTONEOF.fields_by_name['oneof_bytes_value'].containing_oneof = _TESTONEOF.oneofs_by_name['oneof_value']
+_TESTONEOF.oneofs_by_name['oneof_value'].fields.append(
+  _TESTONEOF.fields_by_name['oneof_enum_value'])
+_TESTONEOF.fields_by_name['oneof_enum_value'].containing_oneof = _TESTONEOF.oneofs_by_name['oneof_value']
+_TESTONEOF.oneofs_by_name['oneof_value'].fields.append(
+  _TESTONEOF.fields_by_name['oneof_message_value'])
+_TESTONEOF.fields_by_name['oneof_message_value'].containing_oneof = _TESTONEOF.oneofs_by_name['oneof_value']
+_TESTMAP_BOOLMAPENTRY.containing_type = _TESTMAP
+_TESTMAP_INT32MAPENTRY.containing_type = _TESTMAP
+_TESTMAP_INT64MAPENTRY.containing_type = _TESTMAP
+_TESTMAP_UINT32MAPENTRY.containing_type = _TESTMAP
+_TESTMAP_UINT64MAPENTRY.containing_type = _TESTMAP
+_TESTMAP_STRINGMAPENTRY.containing_type = _TESTMAP
+_TESTMAP.fields_by_name['bool_map'].message_type = _TESTMAP_BOOLMAPENTRY
+_TESTMAP.fields_by_name['int32_map'].message_type = _TESTMAP_INT32MAPENTRY
+_TESTMAP.fields_by_name['int64_map'].message_type = _TESTMAP_INT64MAPENTRY
+_TESTMAP.fields_by_name['uint32_map'].message_type = _TESTMAP_UINT32MAPENTRY
+_TESTMAP.fields_by_name['uint64_map'].message_type = _TESTMAP_UINT64MAPENTRY
+_TESTMAP.fields_by_name['string_map'].message_type = _TESTMAP_STRINGMAPENTRY
+_TESTNESTEDMAP_BOOLMAPENTRY.containing_type = _TESTNESTEDMAP
+_TESTNESTEDMAP_INT32MAPENTRY.containing_type = _TESTNESTEDMAP
+_TESTNESTEDMAP_INT64MAPENTRY.containing_type = _TESTNESTEDMAP
+_TESTNESTEDMAP_UINT32MAPENTRY.containing_type = _TESTNESTEDMAP
+_TESTNESTEDMAP_UINT64MAPENTRY.containing_type = _TESTNESTEDMAP
+_TESTNESTEDMAP_STRINGMAPENTRY.containing_type = _TESTNESTEDMAP
+_TESTNESTEDMAP_MAPMAPENTRY.fields_by_name['value'].message_type = _TESTNESTEDMAP
+_TESTNESTEDMAP_MAPMAPENTRY.containing_type = _TESTNESTEDMAP
+_TESTNESTEDMAP.fields_by_name['bool_map'].message_type = _TESTNESTEDMAP_BOOLMAPENTRY
+_TESTNESTEDMAP.fields_by_name['int32_map'].message_type = _TESTNESTEDMAP_INT32MAPENTRY
+_TESTNESTEDMAP.fields_by_name['int64_map'].message_type = _TESTNESTEDMAP_INT64MAPENTRY
+_TESTNESTEDMAP.fields_by_name['uint32_map'].message_type = _TESTNESTEDMAP_UINT32MAPENTRY
+_TESTNESTEDMAP.fields_by_name['uint64_map'].message_type = _TESTNESTEDMAP_UINT64MAPENTRY
+_TESTNESTEDMAP.fields_by_name['string_map'].message_type = _TESTNESTEDMAP_STRINGMAPENTRY
+_TESTNESTEDMAP.fields_by_name['map_map'].message_type = _TESTNESTEDMAP_MAPMAPENTRY
+_TESTSTRINGMAP_STRINGMAPENTRY.containing_type = _TESTSTRINGMAP
+_TESTSTRINGMAP.fields_by_name['string_map'].message_type = _TESTSTRINGMAP_STRINGMAPENTRY
+_TESTWRAPPER.fields_by_name['bool_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._BOOLVALUE
+_TESTWRAPPER.fields_by_name['int32_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._INT32VALUE
+_TESTWRAPPER.fields_by_name['int64_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._INT64VALUE
+_TESTWRAPPER.fields_by_name['uint32_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._UINT32VALUE
+_TESTWRAPPER.fields_by_name['uint64_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._UINT64VALUE
+_TESTWRAPPER.fields_by_name['float_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._FLOATVALUE
+_TESTWRAPPER.fields_by_name['double_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._DOUBLEVALUE
+_TESTWRAPPER.fields_by_name['string_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._STRINGVALUE
+_TESTWRAPPER.fields_by_name['bytes_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._BYTESVALUE
+_TESTWRAPPER.fields_by_name['repeated_bool_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._BOOLVALUE
+_TESTWRAPPER.fields_by_name['repeated_int32_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._INT32VALUE
+_TESTWRAPPER.fields_by_name['repeated_int64_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._INT64VALUE
+_TESTWRAPPER.fields_by_name['repeated_uint32_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._UINT32VALUE
+_TESTWRAPPER.fields_by_name['repeated_uint64_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._UINT64VALUE
+_TESTWRAPPER.fields_by_name['repeated_float_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._FLOATVALUE
+_TESTWRAPPER.fields_by_name['repeated_double_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._DOUBLEVALUE
+_TESTWRAPPER.fields_by_name['repeated_string_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._STRINGVALUE
+_TESTWRAPPER.fields_by_name['repeated_bytes_value'].message_type = google_dot_protobuf_dot_wrappers__pb2._BYTESVALUE
+_TESTTIMESTAMP.fields_by_name['value'].message_type = google_dot_protobuf_dot_timestamp__pb2._TIMESTAMP
+_TESTTIMESTAMP.fields_by_name['repeated_value'].message_type = google_dot_protobuf_dot_timestamp__pb2._TIMESTAMP
+_TESTDURATION.fields_by_name['value'].message_type = google_dot_protobuf_dot_duration__pb2._DURATION
+_TESTDURATION.fields_by_name['repeated_value'].message_type = google_dot_protobuf_dot_duration__pb2._DURATION
+_TESTFIELDMASK.fields_by_name['value'].message_type = google_dot_protobuf_dot_field__mask__pb2._FIELDMASK
+_TESTSTRUCT.fields_by_name['value'].message_type = google_dot_protobuf_dot_struct__pb2._STRUCT
+_TESTSTRUCT.fields_by_name['repeated_value'].message_type = google_dot_protobuf_dot_struct__pb2._STRUCT
+_TESTANY.fields_by_name['value'].message_type = google_dot_protobuf_dot_any__pb2._ANY
+_TESTANY.fields_by_name['repeated_value'].message_type = google_dot_protobuf_dot_any__pb2._ANY
+_TESTVALUE.fields_by_name['value'].message_type = google_dot_protobuf_dot_struct__pb2._VALUE
+_TESTVALUE.fields_by_name['repeated_value'].message_type = google_dot_protobuf_dot_struct__pb2._VALUE
+_TESTLISTVALUE.fields_by_name['value'].message_type = google_dot_protobuf_dot_struct__pb2._LISTVALUE
+_TESTLISTVALUE.fields_by_name['repeated_value'].message_type = google_dot_protobuf_dot_struct__pb2._LISTVALUE
+_TESTBOOLVALUE_BOOLMAPENTRY.containing_type = _TESTBOOLVALUE
+_TESTBOOLVALUE.fields_by_name['bool_map'].message_type = _TESTBOOLVALUE_BOOLMAPENTRY
+_TESTEXTENSIONS.fields_by_name['extensions'].message_type = google_dot_protobuf_dot_unittest__pb2._TESTALLEXTENSIONS
+_TESTENUMVALUE.fields_by_name['enum_value1'].enum_type = _ENUMTYPE
+_TESTENUMVALUE.fields_by_name['enum_value2'].enum_type = _ENUMTYPE
+_TESTENUMVALUE.fields_by_name['enum_value3'].enum_type = _ENUMTYPE
+DESCRIPTOR.message_types_by_name['MessageType'] = _MESSAGETYPE
+DESCRIPTOR.message_types_by_name['TestMessage'] = _TESTMESSAGE
+DESCRIPTOR.message_types_by_name['TestOneof'] = _TESTONEOF
+DESCRIPTOR.message_types_by_name['TestMap'] = _TESTMAP
+DESCRIPTOR.message_types_by_name['TestNestedMap'] = _TESTNESTEDMAP
+DESCRIPTOR.message_types_by_name['TestStringMap'] = _TESTSTRINGMAP
+DESCRIPTOR.message_types_by_name['TestWrapper'] = _TESTWRAPPER
+DESCRIPTOR.message_types_by_name['TestTimestamp'] = _TESTTIMESTAMP
+DESCRIPTOR.message_types_by_name['TestDuration'] = _TESTDURATION
+DESCRIPTOR.message_types_by_name['TestFieldMask'] = _TESTFIELDMASK
+DESCRIPTOR.message_types_by_name['TestStruct'] = _TESTSTRUCT
+DESCRIPTOR.message_types_by_name['TestAny'] = _TESTANY
+DESCRIPTOR.message_types_by_name['TestValue'] = _TESTVALUE
+DESCRIPTOR.message_types_by_name['TestListValue'] = _TESTLISTVALUE
+DESCRIPTOR.message_types_by_name['TestBoolValue'] = _TESTBOOLVALUE
+DESCRIPTOR.message_types_by_name['TestCustomJsonName'] = _TESTCUSTOMJSONNAME
+DESCRIPTOR.message_types_by_name['TestExtensions'] = _TESTEXTENSIONS
+DESCRIPTOR.message_types_by_name['TestEnumValue'] = _TESTENUMVALUE
+DESCRIPTOR.enum_types_by_name['EnumType'] = _ENUMTYPE
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+MessageType = _reflection.GeneratedProtocolMessageType('MessageType', (_message.Message,), {
+  'DESCRIPTOR' : _MESSAGETYPE,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.MessageType)
+  })
+_sym_db.RegisterMessage(MessageType)
+
+TestMessage = _reflection.GeneratedProtocolMessageType('TestMessage', (_message.Message,), {
+  'DESCRIPTOR' : _TESTMESSAGE,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestMessage)
+  })
+_sym_db.RegisterMessage(TestMessage)
+
+TestOneof = _reflection.GeneratedProtocolMessageType('TestOneof', (_message.Message,), {
+  'DESCRIPTOR' : _TESTONEOF,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestOneof)
+  })
+_sym_db.RegisterMessage(TestOneof)
+
+TestMap = _reflection.GeneratedProtocolMessageType('TestMap', (_message.Message,), {
+
+  'BoolMapEntry' : _reflection.GeneratedProtocolMessageType('BoolMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_BOOLMAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestMap.BoolMapEntry)
+    })
+  ,
+
+  'Int32MapEntry' : _reflection.GeneratedProtocolMessageType('Int32MapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_INT32MAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestMap.Int32MapEntry)
+    })
+  ,
+
+  'Int64MapEntry' : _reflection.GeneratedProtocolMessageType('Int64MapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_INT64MAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestMap.Int64MapEntry)
+    })
+  ,
+
+  'Uint32MapEntry' : _reflection.GeneratedProtocolMessageType('Uint32MapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_UINT32MAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestMap.Uint32MapEntry)
+    })
+  ,
+
+  'Uint64MapEntry' : _reflection.GeneratedProtocolMessageType('Uint64MapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_UINT64MAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestMap.Uint64MapEntry)
+    })
+  ,
+
+  'StringMapEntry' : _reflection.GeneratedProtocolMessageType('StringMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTMAP_STRINGMAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestMap.StringMapEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTMAP,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestMap)
+  })
+_sym_db.RegisterMessage(TestMap)
+_sym_db.RegisterMessage(TestMap.BoolMapEntry)
+_sym_db.RegisterMessage(TestMap.Int32MapEntry)
+_sym_db.RegisterMessage(TestMap.Int64MapEntry)
+_sym_db.RegisterMessage(TestMap.Uint32MapEntry)
+_sym_db.RegisterMessage(TestMap.Uint64MapEntry)
+_sym_db.RegisterMessage(TestMap.StringMapEntry)
+
+TestNestedMap = _reflection.GeneratedProtocolMessageType('TestNestedMap', (_message.Message,), {
+
+  'BoolMapEntry' : _reflection.GeneratedProtocolMessageType('BoolMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTNESTEDMAP_BOOLMAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestNestedMap.BoolMapEntry)
+    })
+  ,
+
+  'Int32MapEntry' : _reflection.GeneratedProtocolMessageType('Int32MapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTNESTEDMAP_INT32MAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestNestedMap.Int32MapEntry)
+    })
+  ,
+
+  'Int64MapEntry' : _reflection.GeneratedProtocolMessageType('Int64MapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTNESTEDMAP_INT64MAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestNestedMap.Int64MapEntry)
+    })
+  ,
+
+  'Uint32MapEntry' : _reflection.GeneratedProtocolMessageType('Uint32MapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTNESTEDMAP_UINT32MAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestNestedMap.Uint32MapEntry)
+    })
+  ,
+
+  'Uint64MapEntry' : _reflection.GeneratedProtocolMessageType('Uint64MapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTNESTEDMAP_UINT64MAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestNestedMap.Uint64MapEntry)
+    })
+  ,
+
+  'StringMapEntry' : _reflection.GeneratedProtocolMessageType('StringMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTNESTEDMAP_STRINGMAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestNestedMap.StringMapEntry)
+    })
+  ,
+
+  'MapMapEntry' : _reflection.GeneratedProtocolMessageType('MapMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTNESTEDMAP_MAPMAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestNestedMap.MapMapEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTNESTEDMAP,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestNestedMap)
+  })
+_sym_db.RegisterMessage(TestNestedMap)
+_sym_db.RegisterMessage(TestNestedMap.BoolMapEntry)
+_sym_db.RegisterMessage(TestNestedMap.Int32MapEntry)
+_sym_db.RegisterMessage(TestNestedMap.Int64MapEntry)
+_sym_db.RegisterMessage(TestNestedMap.Uint32MapEntry)
+_sym_db.RegisterMessage(TestNestedMap.Uint64MapEntry)
+_sym_db.RegisterMessage(TestNestedMap.StringMapEntry)
+_sym_db.RegisterMessage(TestNestedMap.MapMapEntry)
+
+TestStringMap = _reflection.GeneratedProtocolMessageType('TestStringMap', (_message.Message,), {
+
+  'StringMapEntry' : _reflection.GeneratedProtocolMessageType('StringMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTSTRINGMAP_STRINGMAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestStringMap.StringMapEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTSTRINGMAP,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestStringMap)
+  })
+_sym_db.RegisterMessage(TestStringMap)
+_sym_db.RegisterMessage(TestStringMap.StringMapEntry)
+
+TestWrapper = _reflection.GeneratedProtocolMessageType('TestWrapper', (_message.Message,), {
+  'DESCRIPTOR' : _TESTWRAPPER,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestWrapper)
+  })
+_sym_db.RegisterMessage(TestWrapper)
+
+TestTimestamp = _reflection.GeneratedProtocolMessageType('TestTimestamp', (_message.Message,), {
+  'DESCRIPTOR' : _TESTTIMESTAMP,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestTimestamp)
+  })
+_sym_db.RegisterMessage(TestTimestamp)
+
+TestDuration = _reflection.GeneratedProtocolMessageType('TestDuration', (_message.Message,), {
+  'DESCRIPTOR' : _TESTDURATION,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestDuration)
+  })
+_sym_db.RegisterMessage(TestDuration)
+
+TestFieldMask = _reflection.GeneratedProtocolMessageType('TestFieldMask', (_message.Message,), {
+  'DESCRIPTOR' : _TESTFIELDMASK,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestFieldMask)
+  })
+_sym_db.RegisterMessage(TestFieldMask)
+
+TestStruct = _reflection.GeneratedProtocolMessageType('TestStruct', (_message.Message,), {
+  'DESCRIPTOR' : _TESTSTRUCT,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestStruct)
+  })
+_sym_db.RegisterMessage(TestStruct)
+
+TestAny = _reflection.GeneratedProtocolMessageType('TestAny', (_message.Message,), {
+  'DESCRIPTOR' : _TESTANY,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestAny)
+  })
+_sym_db.RegisterMessage(TestAny)
+
+TestValue = _reflection.GeneratedProtocolMessageType('TestValue', (_message.Message,), {
+  'DESCRIPTOR' : _TESTVALUE,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestValue)
+  })
+_sym_db.RegisterMessage(TestValue)
+
+TestListValue = _reflection.GeneratedProtocolMessageType('TestListValue', (_message.Message,), {
+  'DESCRIPTOR' : _TESTLISTVALUE,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestListValue)
+  })
+_sym_db.RegisterMessage(TestListValue)
+
+TestBoolValue = _reflection.GeneratedProtocolMessageType('TestBoolValue', (_message.Message,), {
+
+  'BoolMapEntry' : _reflection.GeneratedProtocolMessageType('BoolMapEntry', (_message.Message,), {
+    'DESCRIPTOR' : _TESTBOOLVALUE_BOOLMAPENTRY,
+    '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+    # @@protoc_insertion_point(class_scope:proto3.TestBoolValue.BoolMapEntry)
+    })
+  ,
+  'DESCRIPTOR' : _TESTBOOLVALUE,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestBoolValue)
+  })
+_sym_db.RegisterMessage(TestBoolValue)
+_sym_db.RegisterMessage(TestBoolValue.BoolMapEntry)
+
+TestCustomJsonName = _reflection.GeneratedProtocolMessageType('TestCustomJsonName', (_message.Message,), {
+  'DESCRIPTOR' : _TESTCUSTOMJSONNAME,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestCustomJsonName)
+  })
+_sym_db.RegisterMessage(TestCustomJsonName)
+
+TestExtensions = _reflection.GeneratedProtocolMessageType('TestExtensions', (_message.Message,), {
+  'DESCRIPTOR' : _TESTEXTENSIONS,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestExtensions)
+  })
+_sym_db.RegisterMessage(TestExtensions)
+
+TestEnumValue = _reflection.GeneratedProtocolMessageType('TestEnumValue', (_message.Message,), {
+  'DESCRIPTOR' : _TESTENUMVALUE,
+  '__module__' : 'google.protobuf.util.json_format_proto3_pb2'
+  # @@protoc_insertion_point(class_scope:proto3.TestEnumValue)
+  })
+_sym_db.RegisterMessage(TestEnumValue)
+
+
+DESCRIPTOR._options = None
+_TESTMAP_BOOLMAPENTRY._options = None
+_TESTMAP_INT32MAPENTRY._options = None
+_TESTMAP_INT64MAPENTRY._options = None
+_TESTMAP_UINT32MAPENTRY._options = None
+_TESTMAP_UINT64MAPENTRY._options = None
+_TESTMAP_STRINGMAPENTRY._options = None
+_TESTNESTEDMAP_BOOLMAPENTRY._options = None
+_TESTNESTEDMAP_INT32MAPENTRY._options = None
+_TESTNESTEDMAP_INT64MAPENTRY._options = None
+_TESTNESTEDMAP_UINT32MAPENTRY._options = None
+_TESTNESTEDMAP_UINT64MAPENTRY._options = None
+_TESTNESTEDMAP_STRINGMAPENTRY._options = None
+_TESTNESTEDMAP_MAPMAPENTRY._options = None
+_TESTSTRINGMAP_STRINGMAPENTRY._options = None
+_TESTBOOLVALUE_BOOLMAPENTRY._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/google/protobuf/wrappers_pb2.py b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/wrappers_pb2.py
new file mode 100644
index 0000000..89ef153
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/google/protobuf/wrappers_pb2.py
@@ -0,0 +1,391 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: google/protobuf/wrappers.proto
+"""Generated protocol buffer code."""
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='google/protobuf/wrappers.proto',
+  package='google.protobuf',
+  syntax='proto3',
+  serialized_options=b'\n\023com.google.protobufB\rWrappersProtoP\001Z*github.com/golang/protobuf/ptypes/wrappers\370\001\001\242\002\003GPB\252\002\036Google.Protobuf.WellKnownTypes',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\x1egoogle/protobuf/wrappers.proto\x12\x0fgoogle.protobuf\"\x1c\n\x0b\x44oubleValue\x12\r\n\x05value\x18\x01 \x01(\x01\"\x1b\n\nFloatValue\x12\r\n\x05value\x18\x01 \x01(\x02\"\x1b\n\nInt64Value\x12\r\n\x05value\x18\x01 \x01(\x03\"\x1c\n\x0bUInt64Value\x12\r\n\x05value\x18\x01 \x01(\x04\"\x1b\n\nInt32Value\x12\r\n\x05value\x18\x01 \x01(\x05\"\x1c\n\x0bUInt32Value\x12\r\n\x05value\x18\x01 \x01(\r\"\x1a\n\tBoolValue\x12\r\n\x05value\x18\x01 \x01(\x08\"\x1c\n\x0bStringValue\x12\r\n\x05value\x18\x01 \x01(\t\"\x1b\n\nBytesValue\x12\r\n\x05value\x18\x01 \x01(\x0c\x42|\n\x13\x63om.google.protobufB\rWrappersProtoP\x01Z*github.com/golang/protobuf/ptypes/wrappers\xf8\x01\x01\xa2\x02\x03GPB\xaa\x02\x1eGoogle.Protobuf.WellKnownTypesb\x06proto3'
+)
+
+
+
+
+_DOUBLEVALUE = _descriptor.Descriptor(
+  name='DoubleValue',
+  full_name='google.protobuf.DoubleValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.DoubleValue.value', index=0,
+      number=1, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=51,
+  serialized_end=79,
+)
+
+
+_FLOATVALUE = _descriptor.Descriptor(
+  name='FloatValue',
+  full_name='google.protobuf.FloatValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.FloatValue.value', index=0,
+      number=1, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=81,
+  serialized_end=108,
+)
+
+
+_INT64VALUE = _descriptor.Descriptor(
+  name='Int64Value',
+  full_name='google.protobuf.Int64Value',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.Int64Value.value', index=0,
+      number=1, type=3, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=110,
+  serialized_end=137,
+)
+
+
+_UINT64VALUE = _descriptor.Descriptor(
+  name='UInt64Value',
+  full_name='google.protobuf.UInt64Value',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.UInt64Value.value', index=0,
+      number=1, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=139,
+  serialized_end=167,
+)
+
+
+_INT32VALUE = _descriptor.Descriptor(
+  name='Int32Value',
+  full_name='google.protobuf.Int32Value',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.Int32Value.value', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=169,
+  serialized_end=196,
+)
+
+
+_UINT32VALUE = _descriptor.Descriptor(
+  name='UInt32Value',
+  full_name='google.protobuf.UInt32Value',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.UInt32Value.value', index=0,
+      number=1, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=198,
+  serialized_end=226,
+)
+
+
+_BOOLVALUE = _descriptor.Descriptor(
+  name='BoolValue',
+  full_name='google.protobuf.BoolValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.BoolValue.value', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=228,
+  serialized_end=254,
+)
+
+
+_STRINGVALUE = _descriptor.Descriptor(
+  name='StringValue',
+  full_name='google.protobuf.StringValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.StringValue.value', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=256,
+  serialized_end=284,
+)
+
+
+_BYTESVALUE = _descriptor.Descriptor(
+  name='BytesValue',
+  full_name='google.protobuf.BytesValue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='google.protobuf.BytesValue.value', index=0,
+      number=1, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"",
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=286,
+  serialized_end=313,
+)
+
+DESCRIPTOR.message_types_by_name['DoubleValue'] = _DOUBLEVALUE
+DESCRIPTOR.message_types_by_name['FloatValue'] = _FLOATVALUE
+DESCRIPTOR.message_types_by_name['Int64Value'] = _INT64VALUE
+DESCRIPTOR.message_types_by_name['UInt64Value'] = _UINT64VALUE
+DESCRIPTOR.message_types_by_name['Int32Value'] = _INT32VALUE
+DESCRIPTOR.message_types_by_name['UInt32Value'] = _UINT32VALUE
+DESCRIPTOR.message_types_by_name['BoolValue'] = _BOOLVALUE
+DESCRIPTOR.message_types_by_name['StringValue'] = _STRINGVALUE
+DESCRIPTOR.message_types_by_name['BytesValue'] = _BYTESVALUE
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+DoubleValue = _reflection.GeneratedProtocolMessageType('DoubleValue', (_message.Message,), {
+  'DESCRIPTOR' : _DOUBLEVALUE,
+  '__module__' : 'google.protobuf.wrappers_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.DoubleValue)
+  })
+_sym_db.RegisterMessage(DoubleValue)
+
+FloatValue = _reflection.GeneratedProtocolMessageType('FloatValue', (_message.Message,), {
+  'DESCRIPTOR' : _FLOATVALUE,
+  '__module__' : 'google.protobuf.wrappers_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.FloatValue)
+  })
+_sym_db.RegisterMessage(FloatValue)
+
+Int64Value = _reflection.GeneratedProtocolMessageType('Int64Value', (_message.Message,), {
+  'DESCRIPTOR' : _INT64VALUE,
+  '__module__' : 'google.protobuf.wrappers_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Int64Value)
+  })
+_sym_db.RegisterMessage(Int64Value)
+
+UInt64Value = _reflection.GeneratedProtocolMessageType('UInt64Value', (_message.Message,), {
+  'DESCRIPTOR' : _UINT64VALUE,
+  '__module__' : 'google.protobuf.wrappers_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.UInt64Value)
+  })
+_sym_db.RegisterMessage(UInt64Value)
+
+Int32Value = _reflection.GeneratedProtocolMessageType('Int32Value', (_message.Message,), {
+  'DESCRIPTOR' : _INT32VALUE,
+  '__module__' : 'google.protobuf.wrappers_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.Int32Value)
+  })
+_sym_db.RegisterMessage(Int32Value)
+
+UInt32Value = _reflection.GeneratedProtocolMessageType('UInt32Value', (_message.Message,), {
+  'DESCRIPTOR' : _UINT32VALUE,
+  '__module__' : 'google.protobuf.wrappers_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.UInt32Value)
+  })
+_sym_db.RegisterMessage(UInt32Value)
+
+BoolValue = _reflection.GeneratedProtocolMessageType('BoolValue', (_message.Message,), {
+  'DESCRIPTOR' : _BOOLVALUE,
+  '__module__' : 'google.protobuf.wrappers_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.BoolValue)
+  })
+_sym_db.RegisterMessage(BoolValue)
+
+StringValue = _reflection.GeneratedProtocolMessageType('StringValue', (_message.Message,), {
+  'DESCRIPTOR' : _STRINGVALUE,
+  '__module__' : 'google.protobuf.wrappers_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.StringValue)
+  })
+_sym_db.RegisterMessage(StringValue)
+
+BytesValue = _reflection.GeneratedProtocolMessageType('BytesValue', (_message.Message,), {
+  'DESCRIPTOR' : _BYTESVALUE,
+  '__module__' : 'google.protobuf.wrappers_pb2'
+  # @@protoc_insertion_point(class_scope:google.protobuf.BytesValue)
+  })
+_sym_db.RegisterMessage(BytesValue)
+
+
+DESCRIPTOR._options = None
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/LICENSE.rst b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/LICENSE.rst
new file mode 100644
index 0000000..ef9c194
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/LICENSE.rst
@@ -0,0 +1,47 @@
+`BSD 3-Clause <https://opensource.org/licenses/BSD-3-Clause>`_
+
+Copyright © 2011 by the Pallets team.
+
+Some rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+-   Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+-   Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+-   Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+We kindly ask you to use these themes in an unmodified manner only with
+Pallets and Pallets-related projects, not for unrelated projects. If you
+like the visual style and want to use it for your own projects, please
+consider making some larger changes to the themes (such as changing font
+faces, sizes, colors or margins).
+
+THIS SOFTWARE AND DOCUMENTATION IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE AND DOCUMENTATION, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+
+----
+
+The initial implementation of itsdangerous was inspired by Django's
+signing module.
+
+Copyright © Django Software Foundation and individual contributors.
+All rights reserved.
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/METADATA
new file mode 100644
index 0000000..7389a4d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/METADATA
@@ -0,0 +1,98 @@
+Metadata-Version: 2.1
+Name: itsdangerous
+Version: 1.1.0
+Summary: Various helpers to pass data to untrusted environments and back.
+Home-page: https://palletsprojects.com/p/itsdangerous/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: Pallets Team
+Maintainer-email: contact@palletsprojects.com
+License: BSD
+Project-URL: Documentation, https://itsdangerous.palletsprojects.com/
+Project-URL: Code, https://github.com/pallets/itsdangerous
+Project-URL: Issue tracker, https://github.com/pallets/itsdangerous/issues
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.4
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*
+
+itsdangerous
+============
+
+... so better sign this
+
+Various helpers to pass data to untrusted environments and to get it
+back safe and sound. Data is cryptographically signed to ensure that a
+token has not been tampered with.
+
+It's possible to customize how data is serialized. Data is compressed as
+needed. A timestamp can be added and verified automatically while
+loading a token.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    pip install -U itsdangerous
+
+.. _pip: https://pip.pypa.io/en/stable/quickstart/
+
+
+A Simple Example
+----------------
+
+Here's how you could generate a token for transmitting a user's id and
+name between web requests.
+
+.. code-block:: python
+
+    from itsdangerous import URLSafeSerializer
+    auth_s = URLSafeSerializer("secret key", "auth")
+    token = auth_s.dumps({"id": 5, "name": "itsdangerous"})
+
+    print(token)
+    # eyJpZCI6NSwibmFtZSI6Iml0c2Rhbmdlcm91cyJ9.6YP6T0BaO67XP--9UzTrmurXSmg
+
+    data = auth_s.loads(token)
+    print(data["name"])
+    # itsdangerous
+
+
+Donate
+------
+
+The Pallets organization develops and supports itsdangerous and other
+popular packages. In order to grow the community of contributors and
+users, and allow the maintainers to devote more time to the projects,
+`please donate today`_.
+
+.. _please donate today: https://palletsprojects.com/donate
+
+
+Links
+-----
+
+*   Website: https://palletsprojects.com/p/itsdangerous/
+*   Documentation: https://itsdangerous.palletsprojects.com/
+*   License: `BSD <https://github.com/pallets/itsdangerous/blob/master/LICENSE.rst>`_
+*   Releases: https://pypi.org/project/itsdangerous/
+*   Code: https://github.com/pallets/itsdangerous
+*   Issue tracker: https://github.com/pallets/itsdangerous/issues
+*   Test status: https://travis-ci.org/pallets/itsdangerous
+*   Test coverage: https://codecov.io/gh/pallets/itsdangerous
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/RECORD
new file mode 100644
index 0000000..ec4b648
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/RECORD
@@ -0,0 +1,26 @@
+itsdangerous-1.1.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+itsdangerous-1.1.0.dist-info/LICENSE.rst,sha256=_rKL-jSNgWsOfbrt3xhJnufoAHxngT241qs3xl4EbNQ,2120
+itsdangerous-1.1.0.dist-info/METADATA,sha256=yyKjL2WOg_WybH2Yt-7NIvGpV3B93IsMc2HbToWc7Sk,3062
+itsdangerous-1.1.0.dist-info/RECORD,,
+itsdangerous-1.1.0.dist-info/WHEEL,sha256=CihQvCnsGZQBGAHLEUMf0IdA4fRduS_NBUTMgCTtvPM,110
+itsdangerous-1.1.0.dist-info/top_level.txt,sha256=gKN1OKLk81i7fbWWildJA88EQ9NhnGMSvZqhfz9ICjk,13
+itsdangerous/__init__.py,sha256=Dr-SkfFdOyiR_WjiqIXnlFpYRMW0XvPBNV5muzE5N_A,708
+itsdangerous/__pycache__/__init__.cpython-38.pyc,,
+itsdangerous/__pycache__/_compat.cpython-38.pyc,,
+itsdangerous/__pycache__/_json.cpython-38.pyc,,
+itsdangerous/__pycache__/encoding.cpython-38.pyc,,
+itsdangerous/__pycache__/exc.cpython-38.pyc,,
+itsdangerous/__pycache__/jws.cpython-38.pyc,,
+itsdangerous/__pycache__/serializer.cpython-38.pyc,,
+itsdangerous/__pycache__/signer.cpython-38.pyc,,
+itsdangerous/__pycache__/timed.cpython-38.pyc,,
+itsdangerous/__pycache__/url_safe.cpython-38.pyc,,
+itsdangerous/_compat.py,sha256=oAAMcQAjwQXQpIbuHT3o-aL56ztm_7Fe-4lD7IteF6A,1133
+itsdangerous/_json.py,sha256=W7BLL4RPnSOjNdo2gfKT3BeARMCIikY6O75rwWV0XoE,431
+itsdangerous/encoding.py,sha256=KhY85PsH3bGHe5JANN4LMZ_3b0IwUWRRnnw1wvLlaIg,1224
+itsdangerous/exc.py,sha256=KFxg7K2XMliMQAxL4jkRNgE8e73z2jcRaLrzwqVObnI,2959
+itsdangerous/jws.py,sha256=6Lh9W-Lu8D9s7bRazs0Zb35eyAZm3pzLeZqHmRELeII,7470
+itsdangerous/serializer.py,sha256=bT-dfjKec9zcKa8Qo8n7mHW_8M-XCTPMOFq1TQI_Fv4,8653
+itsdangerous/signer.py,sha256=OOZbK8XomBjQfOFEul8osesn7fc80MXB0L1r7E86_GQ,6345
+itsdangerous/timed.py,sha256=on5Q5lX7LT_LaETOhzF1ZmrRbia8P98263R8FiRyM6Y,5635
+itsdangerous/url_safe.py,sha256=xnFTaukIPmW6Qwn6uNQLgzdau8RuAKnp5N7ukuXykj0,2275
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/WHEEL
new file mode 100644
index 0000000..dea0e20
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.32.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/top_level.txt
new file mode 100644
index 0000000..e163955
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous-1.1.0.dist-info/top_level.txt
@@ -0,0 +1 @@
+itsdangerous
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/__init__.py b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/__init__.py
new file mode 100644
index 0000000..0fcd8c1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/__init__.py
@@ -0,0 +1,22 @@
+from ._json import json
+from .encoding import base64_decode
+from .encoding import base64_encode
+from .encoding import want_bytes
+from .exc import BadData
+from .exc import BadHeader
+from .exc import BadPayload
+from .exc import BadSignature
+from .exc import BadTimeSignature
+from .exc import SignatureExpired
+from .jws import JSONWebSignatureSerializer
+from .jws import TimedJSONWebSignatureSerializer
+from .serializer import Serializer
+from .signer import HMACAlgorithm
+from .signer import NoneAlgorithm
+from .signer import Signer
+from .timed import TimedSerializer
+from .timed import TimestampSigner
+from .url_safe import URLSafeSerializer
+from .url_safe import URLSafeTimedSerializer
+
+__version__ = "1.1.0"
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diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/__pycache__/url_safe.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/__pycache__/url_safe.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/_compat.py b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/_compat.py
new file mode 100644
index 0000000..2291bce
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/_compat.py
@@ -0,0 +1,46 @@
+import decimal
+import hmac
+import numbers
+import sys
+
+PY2 = sys.version_info[0] == 2
+
+if PY2:
+    from itertools import izip
+
+    text_type = unicode  # noqa: 821
+else:
+    izip = zip
+    text_type = str
+
+number_types = (numbers.Real, decimal.Decimal)
+
+
+def _constant_time_compare(val1, val2):
+    """Return ``True`` if the two strings are equal, ``False``
+    otherwise.
+
+    The time taken is independent of the number of characters that
+    match. Do not use this function for anything else than comparision
+    with known length targets.
+
+    This is should be implemented in C in order to get it completely
+    right.
+
+    This is an alias of :func:`hmac.compare_digest` on Python>=2.7,3.3.
+    """
+    len_eq = len(val1) == len(val2)
+    if len_eq:
+        result = 0
+        left = val1
+    else:
+        result = 1
+        left = val2
+    for x, y in izip(bytearray(left), bytearray(val2)):
+        result |= x ^ y
+    return result == 0
+
+
+# Starting with 2.7/3.3 the standard library has a c-implementation for
+# constant time string compares.
+constant_time_compare = getattr(hmac, "compare_digest", _constant_time_compare)
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/_json.py b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/_json.py
new file mode 100644
index 0000000..426b36e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/_json.py
@@ -0,0 +1,18 @@
+try:
+    import simplejson as json
+except ImportError:
+    import json
+
+
+class _CompactJSON(object):
+    """Wrapper around json module that strips whitespace."""
+
+    @staticmethod
+    def loads(payload):
+        return json.loads(payload)
+
+    @staticmethod
+    def dumps(obj, **kwargs):
+        kwargs.setdefault("ensure_ascii", False)
+        kwargs.setdefault("separators", (",", ":"))
+        return json.dumps(obj, **kwargs)
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/encoding.py b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/encoding.py
new file mode 100644
index 0000000..1e28969
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/encoding.py
@@ -0,0 +1,49 @@
+import base64
+import string
+import struct
+
+from ._compat import text_type
+from .exc import BadData
+
+
+def want_bytes(s, encoding="utf-8", errors="strict"):
+    if isinstance(s, text_type):
+        s = s.encode(encoding, errors)
+    return s
+
+
+def base64_encode(string):
+    """Base64 encode a string of bytes or text. The resulting bytes are
+    safe to use in URLs.
+    """
+    string = want_bytes(string)
+    return base64.urlsafe_b64encode(string).rstrip(b"=")
+
+
+def base64_decode(string):
+    """Base64 decode a URL-safe string of bytes or text. The result is
+    bytes.
+    """
+    string = want_bytes(string, encoding="ascii", errors="ignore")
+    string += b"=" * (-len(string) % 4)
+
+    try:
+        return base64.urlsafe_b64decode(string)
+    except (TypeError, ValueError):
+        raise BadData("Invalid base64-encoded data")
+
+
+# The alphabet used by base64.urlsafe_*
+_base64_alphabet = (string.ascii_letters + string.digits + "-_=").encode("ascii")
+
+_int64_struct = struct.Struct(">Q")
+_int_to_bytes = _int64_struct.pack
+_bytes_to_int = _int64_struct.unpack
+
+
+def int_to_bytes(num):
+    return _int_to_bytes(num).lstrip(b"\x00")
+
+
+def bytes_to_int(bytestr):
+    return _bytes_to_int(bytestr.rjust(8, b"\x00"))[0]
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/exc.py b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/exc.py
new file mode 100644
index 0000000..287d691
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/exc.py
@@ -0,0 +1,98 @@
+from ._compat import PY2
+from ._compat import text_type
+
+
+class BadData(Exception):
+    """Raised if bad data of any sort was encountered. This is the base
+    for all exceptions that itsdangerous defines.
+
+    .. versionadded:: 0.15
+    """
+
+    message = None
+
+    def __init__(self, message):
+        super(BadData, self).__init__(self, message)
+        self.message = message
+
+    def __str__(self):
+        return text_type(self.message)
+
+    if PY2:
+        __unicode__ = __str__
+
+        def __str__(self):
+            return self.__unicode__().encode("utf-8")
+
+
+class BadSignature(BadData):
+    """Raised if a signature does not match."""
+
+    def __init__(self, message, payload=None):
+        BadData.__init__(self, message)
+
+        #: The payload that failed the signature test. In some
+        #: situations you might still want to inspect this, even if
+        #: you know it was tampered with.
+        #:
+        #: .. versionadded:: 0.14
+        self.payload = payload
+
+
+class BadTimeSignature(BadSignature):
+    """Raised if a time-based signature is invalid. This is a subclass
+    of :class:`BadSignature`.
+    """
+
+    def __init__(self, message, payload=None, date_signed=None):
+        BadSignature.__init__(self, message, payload)
+
+        #: If the signature expired this exposes the date of when the
+        #: signature was created. This can be helpful in order to
+        #: tell the user how long a link has been gone stale.
+        #:
+        #: .. versionadded:: 0.14
+        self.date_signed = date_signed
+
+
+class SignatureExpired(BadTimeSignature):
+    """Raised if a signature timestamp is older than ``max_age``. This
+    is a subclass of :exc:`BadTimeSignature`.
+    """
+
+
+class BadHeader(BadSignature):
+    """Raised if a signed header is invalid in some form. This only
+    happens for serializers that have a header that goes with the
+    signature.
+
+    .. versionadded:: 0.24
+    """
+
+    def __init__(self, message, payload=None, header=None, original_error=None):
+        BadSignature.__init__(self, message, payload)
+
+        #: If the header is actually available but just malformed it
+        #: might be stored here.
+        self.header = header
+
+        #: If available, the error that indicates why the payload was
+        #: not valid. This might be ``None``.
+        self.original_error = original_error
+
+
+class BadPayload(BadData):
+    """Raised if a payload is invalid. This could happen if the payload
+    is loaded despite an invalid signature, or if there is a mismatch
+    between the serializer and deserializer. The original exception
+    that occurred during loading is stored on as :attr:`original_error`.
+
+    .. versionadded:: 0.15
+    """
+
+    def __init__(self, message, original_error=None):
+        BadData.__init__(self, message)
+
+        #: If available, the error that indicates why the payload was
+        #: not valid. This might be ``None``.
+        self.original_error = original_error
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/jws.py b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/jws.py
new file mode 100644
index 0000000..92e9ec8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/jws.py
@@ -0,0 +1,218 @@
+import hashlib
+import time
+from datetime import datetime
+
+from ._compat import number_types
+from ._json import _CompactJSON
+from ._json import json
+from .encoding import base64_decode
+from .encoding import base64_encode
+from .encoding import want_bytes
+from .exc import BadData
+from .exc import BadHeader
+from .exc import BadPayload
+from .exc import BadSignature
+from .exc import SignatureExpired
+from .serializer import Serializer
+from .signer import HMACAlgorithm
+from .signer import NoneAlgorithm
+
+
+class JSONWebSignatureSerializer(Serializer):
+    """This serializer implements JSON Web Signature (JWS) support. Only
+    supports the JWS Compact Serialization.
+    """
+
+    jws_algorithms = {
+        "HS256": HMACAlgorithm(hashlib.sha256),
+        "HS384": HMACAlgorithm(hashlib.sha384),
+        "HS512": HMACAlgorithm(hashlib.sha512),
+        "none": NoneAlgorithm(),
+    }
+
+    #: The default algorithm to use for signature generation
+    default_algorithm = "HS512"
+
+    default_serializer = _CompactJSON
+
+    def __init__(
+        self,
+        secret_key,
+        salt=None,
+        serializer=None,
+        serializer_kwargs=None,
+        signer=None,
+        signer_kwargs=None,
+        algorithm_name=None,
+    ):
+        Serializer.__init__(
+            self,
+            secret_key=secret_key,
+            salt=salt,
+            serializer=serializer,
+            serializer_kwargs=serializer_kwargs,
+            signer=signer,
+            signer_kwargs=signer_kwargs,
+        )
+        if algorithm_name is None:
+            algorithm_name = self.default_algorithm
+        self.algorithm_name = algorithm_name
+        self.algorithm = self.make_algorithm(algorithm_name)
+
+    def load_payload(self, payload, serializer=None, return_header=False):
+        payload = want_bytes(payload)
+        if b"." not in payload:
+            raise BadPayload('No "." found in value')
+        base64d_header, base64d_payload = payload.split(b".", 1)
+        try:
+            json_header = base64_decode(base64d_header)
+        except Exception as e:
+            raise BadHeader(
+                "Could not base64 decode the header because of an exception",
+                original_error=e,
+            )
+        try:
+            json_payload = base64_decode(base64d_payload)
+        except Exception as e:
+            raise BadPayload(
+                "Could not base64 decode the payload because of an exception",
+                original_error=e,
+            )
+        try:
+            header = Serializer.load_payload(self, json_header, serializer=json)
+        except BadData as e:
+            raise BadHeader(
+                "Could not unserialize header because it was malformed",
+                original_error=e,
+            )
+        if not isinstance(header, dict):
+            raise BadHeader("Header payload is not a JSON object", header=header)
+        payload = Serializer.load_payload(self, json_payload, serializer=serializer)
+        if return_header:
+            return payload, header
+        return payload
+
+    def dump_payload(self, header, obj):
+        base64d_header = base64_encode(
+            self.serializer.dumps(header, **self.serializer_kwargs)
+        )
+        base64d_payload = base64_encode(
+            self.serializer.dumps(obj, **self.serializer_kwargs)
+        )
+        return base64d_header + b"." + base64d_payload
+
+    def make_algorithm(self, algorithm_name):
+        try:
+            return self.jws_algorithms[algorithm_name]
+        except KeyError:
+            raise NotImplementedError("Algorithm not supported")
+
+    def make_signer(self, salt=None, algorithm=None):
+        if salt is None:
+            salt = self.salt
+        key_derivation = "none" if salt is None else None
+        if algorithm is None:
+            algorithm = self.algorithm
+        return self.signer(
+            self.secret_key,
+            salt=salt,
+            sep=".",
+            key_derivation=key_derivation,
+            algorithm=algorithm,
+        )
+
+    def make_header(self, header_fields):
+        header = header_fields.copy() if header_fields else {}
+        header["alg"] = self.algorithm_name
+        return header
+
+    def dumps(self, obj, salt=None, header_fields=None):
+        """Like :meth:`.Serializer.dumps` but creates a JSON Web
+        Signature. It also allows for specifying additional fields to be
+        included in the JWS header.
+        """
+        header = self.make_header(header_fields)
+        signer = self.make_signer(salt, self.algorithm)
+        return signer.sign(self.dump_payload(header, obj))
+
+    def loads(self, s, salt=None, return_header=False):
+        """Reverse of :meth:`dumps`. If requested via ``return_header``
+        it will return a tuple of payload and header.
+        """
+        payload, header = self.load_payload(
+            self.make_signer(salt, self.algorithm).unsign(want_bytes(s)),
+            return_header=True,
+        )
+        if header.get("alg") != self.algorithm_name:
+            raise BadHeader("Algorithm mismatch", header=header, payload=payload)
+        if return_header:
+            return payload, header
+        return payload
+
+    def loads_unsafe(self, s, salt=None, return_header=False):
+        kwargs = {"return_header": return_header}
+        return self._loads_unsafe_impl(s, salt, kwargs, kwargs)
+
+
+class TimedJSONWebSignatureSerializer(JSONWebSignatureSerializer):
+    """Works like the regular :class:`JSONWebSignatureSerializer` but
+    also records the time of the signing and can be used to expire
+    signatures.
+
+    JWS currently does not specify this behavior but it mentions a
+    possible extension like this in the spec. Expiry date is encoded
+    into the header similar to what's specified in `draft-ietf-oauth
+    -json-web-token <http://self-issued.info/docs/draft-ietf-oauth-json
+    -web-token.html#expDef>`_.
+    """
+
+    DEFAULT_EXPIRES_IN = 3600
+
+    def __init__(self, secret_key, expires_in=None, **kwargs):
+        JSONWebSignatureSerializer.__init__(self, secret_key, **kwargs)
+        if expires_in is None:
+            expires_in = self.DEFAULT_EXPIRES_IN
+        self.expires_in = expires_in
+
+    def make_header(self, header_fields):
+        header = JSONWebSignatureSerializer.make_header(self, header_fields)
+        iat = self.now()
+        exp = iat + self.expires_in
+        header["iat"] = iat
+        header["exp"] = exp
+        return header
+
+    def loads(self, s, salt=None, return_header=False):
+        payload, header = JSONWebSignatureSerializer.loads(
+            self, s, salt, return_header=True
+        )
+
+        if "exp" not in header:
+            raise BadSignature("Missing expiry date", payload=payload)
+
+        int_date_error = BadHeader("Expiry date is not an IntDate", payload=payload)
+        try:
+            header["exp"] = int(header["exp"])
+        except ValueError:
+            raise int_date_error
+        if header["exp"] < 0:
+            raise int_date_error
+
+        if header["exp"] < self.now():
+            raise SignatureExpired(
+                "Signature expired",
+                payload=payload,
+                date_signed=self.get_issue_date(header),
+            )
+
+        if return_header:
+            return payload, header
+        return payload
+
+    def get_issue_date(self, header):
+        rv = header.get("iat")
+        if isinstance(rv, number_types):
+            return datetime.utcfromtimestamp(int(rv))
+
+    def now(self):
+        return int(time.time())
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/serializer.py b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/serializer.py
new file mode 100644
index 0000000..12c20f4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/serializer.py
@@ -0,0 +1,233 @@
+import hashlib
+
+from ._compat import text_type
+from ._json import json
+from .encoding import want_bytes
+from .exc import BadPayload
+from .exc import BadSignature
+from .signer import Signer
+
+
+def is_text_serializer(serializer):
+    """Checks whether a serializer generates text or binary."""
+    return isinstance(serializer.dumps({}), text_type)
+
+
+class Serializer(object):
+    """This class provides a serialization interface on top of the
+    signer. It provides a similar API to json/pickle and other modules
+    but is structured differently internally. If you want to change the
+    underlying implementation for parsing and loading you have to
+    override the :meth:`load_payload` and :meth:`dump_payload`
+    functions.
+
+    This implementation uses simplejson if available for dumping and
+    loading and will fall back to the standard library's json module if
+    it's not available.
+
+    You do not need to subclass this class in order to switch out or
+    customize the :class:`.Signer`. You can instead pass a different
+    class to the constructor as well as keyword arguments as a dict that
+    should be forwarded.
+
+    .. code-block:: python
+
+        s = Serializer(signer_kwargs={'key_derivation': 'hmac'})
+
+    You may want to upgrade the signing parameters without invalidating
+    existing signatures that are in use. Fallback signatures can be
+    given that will be tried if unsigning with the current signer fails.
+
+    Fallback signers can be defined by providing a list of
+    ``fallback_signers``. Each item can be one of the following: a
+    signer class (which is instantiated with ``signer_kwargs``,
+    ``salt``, and ``secret_key``), a tuple
+    ``(signer_class, signer_kwargs)``, or a dict of ``signer_kwargs``.
+
+    For example, this is a serializer that signs using SHA-512, but will
+    unsign using either SHA-512 or SHA1:
+
+    .. code-block:: python
+
+        s = Serializer(
+            signer_kwargs={"digest_method": hashlib.sha512},
+            fallback_signers=[{"digest_method": hashlib.sha1}]
+        )
+
+    .. versionchanged:: 0.14:
+        The ``signer`` and ``signer_kwargs`` parameters were added to
+        the constructor.
+
+    .. versionchanged:: 1.1.0:
+        Added support for ``fallback_signers`` and configured a default
+        SHA-512 fallback. This fallback is for users who used the yanked
+        1.0.0 release which defaulted to SHA-512.
+    """
+
+    #: If a serializer module or class is not passed to the constructor
+    #: this one is picked up. This currently defaults to :mod:`json`.
+    default_serializer = json
+
+    #: The default :class:`Signer` class that is being used by this
+    #: serializer.
+    #:
+    #: .. versionadded:: 0.14
+    default_signer = Signer
+
+    #: The default fallback signers.
+    default_fallback_signers = [{"digest_method": hashlib.sha512}]
+
+    def __init__(
+        self,
+        secret_key,
+        salt=b"itsdangerous",
+        serializer=None,
+        serializer_kwargs=None,
+        signer=None,
+        signer_kwargs=None,
+        fallback_signers=None,
+    ):
+        self.secret_key = want_bytes(secret_key)
+        self.salt = want_bytes(salt)
+        if serializer is None:
+            serializer = self.default_serializer
+        self.serializer = serializer
+        self.is_text_serializer = is_text_serializer(serializer)
+        if signer is None:
+            signer = self.default_signer
+        self.signer = signer
+        self.signer_kwargs = signer_kwargs or {}
+        if fallback_signers is None:
+            fallback_signers = list(self.default_fallback_signers or ())
+        self.fallback_signers = fallback_signers
+        self.serializer_kwargs = serializer_kwargs or {}
+
+    def load_payload(self, payload, serializer=None):
+        """Loads the encoded object. This function raises
+        :class:`.BadPayload` if the payload is not valid. The
+        ``serializer`` parameter can be used to override the serializer
+        stored on the class. The encoded ``payload`` should always be
+        bytes.
+        """
+        if serializer is None:
+            serializer = self.serializer
+            is_text = self.is_text_serializer
+        else:
+            is_text = is_text_serializer(serializer)
+        try:
+            if is_text:
+                payload = payload.decode("utf-8")
+            return serializer.loads(payload)
+        except Exception as e:
+            raise BadPayload(
+                "Could not load the payload because an exception"
+                " occurred on unserializing the data.",
+                original_error=e,
+            )
+
+    def dump_payload(self, obj):
+        """Dumps the encoded object. The return value is always bytes.
+        If the internal serializer returns text, the value will be
+        encoded as UTF-8.
+        """
+        return want_bytes(self.serializer.dumps(obj, **self.serializer_kwargs))
+
+    def make_signer(self, salt=None):
+        """Creates a new instance of the signer to be used. The default
+        implementation uses the :class:`.Signer` base class.
+        """
+        if salt is None:
+            salt = self.salt
+        return self.signer(self.secret_key, salt=salt, **self.signer_kwargs)
+
+    def iter_unsigners(self, salt=None):
+        """Iterates over all signers to be tried for unsigning. Starts
+        with the configured signer, then constructs each signer
+        specified in ``fallback_signers``.
+        """
+        if salt is None:
+            salt = self.salt
+        yield self.make_signer(salt)
+        for fallback in self.fallback_signers:
+            if type(fallback) is dict:
+                kwargs = fallback
+                fallback = self.signer
+            elif type(fallback) is tuple:
+                fallback, kwargs = fallback
+            else:
+                kwargs = self.signer_kwargs
+            yield fallback(self.secret_key, salt=salt, **kwargs)
+
+    def dumps(self, obj, salt=None):
+        """Returns a signed string serialized with the internal
+        serializer. The return value can be either a byte or unicode
+        string depending on the format of the internal serializer.
+        """
+        payload = want_bytes(self.dump_payload(obj))
+        rv = self.make_signer(salt).sign(payload)
+        if self.is_text_serializer:
+            rv = rv.decode("utf-8")
+        return rv
+
+    def dump(self, obj, f, salt=None):
+        """Like :meth:`dumps` but dumps into a file. The file handle has
+        to be compatible with what the internal serializer expects.
+        """
+        f.write(self.dumps(obj, salt))
+
+    def loads(self, s, salt=None):
+        """Reverse of :meth:`dumps`. Raises :exc:`.BadSignature` if the
+        signature validation fails.
+        """
+        s = want_bytes(s)
+        last_exception = None
+        for signer in self.iter_unsigners(salt):
+            try:
+                return self.load_payload(signer.unsign(s))
+            except BadSignature as err:
+                last_exception = err
+        raise last_exception
+
+    def load(self, f, salt=None):
+        """Like :meth:`loads` but loads from a file."""
+        return self.loads(f.read(), salt)
+
+    def loads_unsafe(self, s, salt=None):
+        """Like :meth:`loads` but without verifying the signature. This
+        is potentially very dangerous to use depending on how your
+        serializer works. The return value is ``(signature_valid,
+        payload)`` instead of just the payload. The first item will be a
+        boolean that indicates if the signature is valid. This function
+        never fails.
+
+        Use it for debugging only and if you know that your serializer
+        module is not exploitable (for example, do not use it with a
+        pickle serializer).
+
+        .. versionadded:: 0.15
+        """
+        return self._loads_unsafe_impl(s, salt)
+
+    def _loads_unsafe_impl(self, s, salt, load_kwargs=None, load_payload_kwargs=None):
+        """Low level helper function to implement :meth:`loads_unsafe`
+        in serializer subclasses.
+        """
+        try:
+            return True, self.loads(s, salt=salt, **(load_kwargs or {}))
+        except BadSignature as e:
+            if e.payload is None:
+                return False, None
+            try:
+                return (
+                    False,
+                    self.load_payload(e.payload, **(load_payload_kwargs or {})),
+                )
+            except BadPayload:
+                return False, None
+
+    def load_unsafe(self, f, *args, **kwargs):
+        """Like :meth:`loads_unsafe` but loads from a file.
+
+        .. versionadded:: 0.15
+        """
+        return self.loads_unsafe(f.read(), *args, **kwargs)
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/signer.py b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/signer.py
new file mode 100644
index 0000000..6bddc03
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/signer.py
@@ -0,0 +1,179 @@
+import hashlib
+import hmac
+
+from ._compat import constant_time_compare
+from .encoding import _base64_alphabet
+from .encoding import base64_decode
+from .encoding import base64_encode
+from .encoding import want_bytes
+from .exc import BadSignature
+
+
+class SigningAlgorithm(object):
+    """Subclasses must implement :meth:`get_signature` to provide
+    signature generation functionality.
+    """
+
+    def get_signature(self, key, value):
+        """Returns the signature for the given key and value."""
+        raise NotImplementedError()
+
+    def verify_signature(self, key, value, sig):
+        """Verifies the given signature matches the expected
+        signature.
+        """
+        return constant_time_compare(sig, self.get_signature(key, value))
+
+
+class NoneAlgorithm(SigningAlgorithm):
+    """Provides an algorithm that does not perform any signing and
+    returns an empty signature.
+    """
+
+    def get_signature(self, key, value):
+        return b""
+
+
+class HMACAlgorithm(SigningAlgorithm):
+    """Provides signature generation using HMACs."""
+
+    #: The digest method to use with the MAC algorithm. This defaults to
+    #: SHA1, but can be changed to any other function in the hashlib
+    #: module.
+    default_digest_method = staticmethod(hashlib.sha1)
+
+    def __init__(self, digest_method=None):
+        if digest_method is None:
+            digest_method = self.default_digest_method
+        self.digest_method = digest_method
+
+    def get_signature(self, key, value):
+        mac = hmac.new(key, msg=value, digestmod=self.digest_method)
+        return mac.digest()
+
+
+class Signer(object):
+    """This class can sign and unsign bytes, validating the signature
+    provided.
+
+    Salt can be used to namespace the hash, so that a signed string is
+    only valid for a given namespace. Leaving this at the default value
+    or re-using a salt value across different parts of your application
+    where the same signed value in one part can mean something different
+    in another part is a security risk.
+
+    See :ref:`the-salt` for an example of what the salt is doing and how
+    you can utilize it.
+
+    .. versionadded:: 0.14
+        ``key_derivation`` and ``digest_method`` were added as arguments
+        to the class constructor.
+
+    .. versionadded:: 0.18
+        ``algorithm`` was added as an argument to the class constructor.
+    """
+
+    #: The digest method to use for the signer.  This defaults to
+    #: SHA1 but can be changed to any other function in the hashlib
+    #: module.
+    #:
+    #: .. versionadded:: 0.14
+    default_digest_method = staticmethod(hashlib.sha1)
+
+    #: Controls how the key is derived. The default is Django-style
+    #: concatenation. Possible values are ``concat``, ``django-concat``
+    #: and ``hmac``. This is used for deriving a key from the secret key
+    #: with an added salt.
+    #:
+    #: .. versionadded:: 0.14
+    default_key_derivation = "django-concat"
+
+    def __init__(
+        self,
+        secret_key,
+        salt=None,
+        sep=".",
+        key_derivation=None,
+        digest_method=None,
+        algorithm=None,
+    ):
+        self.secret_key = want_bytes(secret_key)
+        self.sep = want_bytes(sep)
+        if self.sep in _base64_alphabet:
+            raise ValueError(
+                "The given separator cannot be used because it may be"
+                " contained in the signature itself. Alphanumeric"
+                " characters and `-_=` must not be used."
+            )
+        self.salt = "itsdangerous.Signer" if salt is None else salt
+        if key_derivation is None:
+            key_derivation = self.default_key_derivation
+        self.key_derivation = key_derivation
+        if digest_method is None:
+            digest_method = self.default_digest_method
+        self.digest_method = digest_method
+        if algorithm is None:
+            algorithm = HMACAlgorithm(self.digest_method)
+        self.algorithm = algorithm
+
+    def derive_key(self):
+        """This method is called to derive the key. The default key
+        derivation choices can be overridden here. Key derivation is not
+        intended to be used as a security method to make a complex key
+        out of a short password. Instead you should use large random
+        secret keys.
+        """
+        salt = want_bytes(self.salt)
+        if self.key_derivation == "concat":
+            return self.digest_method(salt + self.secret_key).digest()
+        elif self.key_derivation == "django-concat":
+            return self.digest_method(salt + b"signer" + self.secret_key).digest()
+        elif self.key_derivation == "hmac":
+            mac = hmac.new(self.secret_key, digestmod=self.digest_method)
+            mac.update(salt)
+            return mac.digest()
+        elif self.key_derivation == "none":
+            return self.secret_key
+        else:
+            raise TypeError("Unknown key derivation method")
+
+    def get_signature(self, value):
+        """Returns the signature for the given value."""
+        value = want_bytes(value)
+        key = self.derive_key()
+        sig = self.algorithm.get_signature(key, value)
+        return base64_encode(sig)
+
+    def sign(self, value):
+        """Signs the given string."""
+        return want_bytes(value) + want_bytes(self.sep) + self.get_signature(value)
+
+    def verify_signature(self, value, sig):
+        """Verifies the signature for the given value."""
+        key = self.derive_key()
+        try:
+            sig = base64_decode(sig)
+        except Exception:
+            return False
+        return self.algorithm.verify_signature(key, value, sig)
+
+    def unsign(self, signed_value):
+        """Unsigns the given string."""
+        signed_value = want_bytes(signed_value)
+        sep = want_bytes(self.sep)
+        if sep not in signed_value:
+            raise BadSignature("No %r found in value" % self.sep)
+        value, sig = signed_value.rsplit(sep, 1)
+        if self.verify_signature(value, sig):
+            return value
+        raise BadSignature("Signature %r does not match" % sig, payload=value)
+
+    def validate(self, signed_value):
+        """Only validates the given signed value. Returns ``True`` if
+        the signature exists and is valid.
+        """
+        try:
+            self.unsign(signed_value)
+            return True
+        except BadSignature:
+            return False
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/timed.py b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/timed.py
new file mode 100644
index 0000000..4c117e4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/timed.py
@@ -0,0 +1,147 @@
+import time
+from datetime import datetime
+
+from ._compat import text_type
+from .encoding import base64_decode
+from .encoding import base64_encode
+from .encoding import bytes_to_int
+from .encoding import int_to_bytes
+from .encoding import want_bytes
+from .exc import BadSignature
+from .exc import BadTimeSignature
+from .exc import SignatureExpired
+from .serializer import Serializer
+from .signer import Signer
+
+
+class TimestampSigner(Signer):
+    """Works like the regular :class:`.Signer` but also records the time
+    of the signing and can be used to expire signatures. The
+    :meth:`unsign` method can raise :exc:`.SignatureExpired` if the
+    unsigning failed because the signature is expired.
+    """
+
+    def get_timestamp(self):
+        """Returns the current timestamp. The function must return an
+        integer.
+        """
+        return int(time.time())
+
+    def timestamp_to_datetime(self, ts):
+        """Used to convert the timestamp from :meth:`get_timestamp` into
+        a datetime object.
+        """
+        return datetime.utcfromtimestamp(ts)
+
+    def sign(self, value):
+        """Signs the given string and also attaches time information."""
+        value = want_bytes(value)
+        timestamp = base64_encode(int_to_bytes(self.get_timestamp()))
+        sep = want_bytes(self.sep)
+        value = value + sep + timestamp
+        return value + sep + self.get_signature(value)
+
+    def unsign(self, value, max_age=None, return_timestamp=False):
+        """Works like the regular :meth:`.Signer.unsign` but can also
+        validate the time. See the base docstring of the class for
+        the general behavior. If ``return_timestamp`` is ``True`` the
+        timestamp of the signature will be returned as a naive
+        :class:`datetime.datetime` object in UTC.
+        """
+        try:
+            result = Signer.unsign(self, value)
+            sig_error = None
+        except BadSignature as e:
+            sig_error = e
+            result = e.payload or b""
+        sep = want_bytes(self.sep)
+
+        # If there is no timestamp in the result there is something
+        # seriously wrong. In case there was a signature error, we raise
+        # that one directly, otherwise we have a weird situation in
+        # which we shouldn't have come except someone uses a time-based
+        # serializer on non-timestamp data, so catch that.
+        if sep not in result:
+            if sig_error:
+                raise sig_error
+            raise BadTimeSignature("timestamp missing", payload=result)
+
+        value, timestamp = result.rsplit(sep, 1)
+        try:
+            timestamp = bytes_to_int(base64_decode(timestamp))
+        except Exception:
+            timestamp = None
+
+        # Signature is *not* okay. Raise a proper error now that we have
+        # split the value and the timestamp.
+        if sig_error is not None:
+            raise BadTimeSignature(
+                text_type(sig_error), payload=value, date_signed=timestamp
+            )
+
+        # Signature was okay but the timestamp is actually not there or
+        # malformed. Should not happen, but we handle it anyway.
+        if timestamp is None:
+            raise BadTimeSignature("Malformed timestamp", payload=value)
+
+        # Check timestamp is not older than max_age
+        if max_age is not None:
+            age = self.get_timestamp() - timestamp
+            if age > max_age:
+                raise SignatureExpired(
+                    "Signature age %s > %s seconds" % (age, max_age),
+                    payload=value,
+                    date_signed=self.timestamp_to_datetime(timestamp),
+                )
+
+        if return_timestamp:
+            return value, self.timestamp_to_datetime(timestamp)
+        return value
+
+    def validate(self, signed_value, max_age=None):
+        """Only validates the given signed value. Returns ``True`` if
+        the signature exists and is valid."""
+        try:
+            self.unsign(signed_value, max_age=max_age)
+            return True
+        except BadSignature:
+            return False
+
+
+class TimedSerializer(Serializer):
+    """Uses :class:`TimestampSigner` instead of the default
+    :class:`.Signer`.
+    """
+
+    default_signer = TimestampSigner
+
+    def loads(self, s, max_age=None, return_timestamp=False, salt=None):
+        """Reverse of :meth:`dumps`, raises :exc:`.BadSignature` if the
+        signature validation fails. If a ``max_age`` is provided it will
+        ensure the signature is not older than that time in seconds. In
+        case the signature is outdated, :exc:`.SignatureExpired` is
+        raised. All arguments are forwarded to the signer's
+        :meth:`~TimestampSigner.unsign` method.
+        """
+        s = want_bytes(s)
+        last_exception = None
+        for signer in self.iter_unsigners(salt):
+            try:
+                base64d, timestamp = signer.unsign(s, max_age, return_timestamp=True)
+                payload = self.load_payload(base64d)
+                if return_timestamp:
+                    return payload, timestamp
+                return payload
+            # If we get a signature expired it means we could read the
+            # signature but it's invalid.  In that case we do not want to
+            # try the next signer.
+            except SignatureExpired:
+                raise
+            except BadSignature as err:
+                last_exception = err
+        raise last_exception
+
+    def loads_unsafe(self, s, max_age=None, salt=None):
+        load_kwargs = {"max_age": max_age}
+        load_payload_kwargs = {}
+        return self._loads_unsafe_impl(s, salt, load_kwargs, load_payload_kwargs)
diff --git a/python3-vckonline/lib/python3.8/site-packages/itsdangerous/url_safe.py b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/url_safe.py
new file mode 100644
index 0000000..fcaa011
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/itsdangerous/url_safe.py
@@ -0,0 +1,65 @@
+import zlib
+
+from ._json import _CompactJSON
+from .encoding import base64_decode
+from .encoding import base64_encode
+from .exc import BadPayload
+from .serializer import Serializer
+from .timed import TimedSerializer
+
+
+class URLSafeSerializerMixin(object):
+    """Mixed in with a regular serializer it will attempt to zlib
+    compress the string to make it shorter if necessary. It will also
+    base64 encode the string so that it can safely be placed in a URL.
+    """
+
+    default_serializer = _CompactJSON
+
+    def load_payload(self, payload, *args, **kwargs):
+        decompress = False
+        if payload.startswith(b"."):
+            payload = payload[1:]
+            decompress = True
+        try:
+            json = base64_decode(payload)
+        except Exception as e:
+            raise BadPayload(
+                "Could not base64 decode the payload because of an exception",
+                original_error=e,
+            )
+        if decompress:
+            try:
+                json = zlib.decompress(json)
+            except Exception as e:
+                raise BadPayload(
+                    "Could not zlib decompress the payload before decoding the payload",
+                    original_error=e,
+                )
+        return super(URLSafeSerializerMixin, self).load_payload(json, *args, **kwargs)
+
+    def dump_payload(self, obj):
+        json = super(URLSafeSerializerMixin, self).dump_payload(obj)
+        is_compressed = False
+        compressed = zlib.compress(json)
+        if len(compressed) < (len(json) - 1):
+            json = compressed
+            is_compressed = True
+        base64d = base64_encode(json)
+        if is_compressed:
+            base64d = b"." + base64d
+        return base64d
+
+
+class URLSafeSerializer(URLSafeSerializerMixin, Serializer):
+    """Works like :class:`.Serializer` but dumps and loads into a URL
+    safe string consisting of the upper and lowercase character of the
+    alphabet as well as ``'_'``, ``'-'`` and ``'.'``.
+    """
+
+
+class URLSafeTimedSerializer(URLSafeSerializerMixin, TimedSerializer):
+    """Works like :class:`.TimedSerializer` but dumps and loads into a
+    URL safe string consisting of the upper and lowercase character of
+    the alphabet as well as ``'_'``, ``'-'`` and ``'.'``.
+    """
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/__init__.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/__init__.py
new file mode 100644
index 0000000..1229ba4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/__init__.py
@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+"""Jinja is a template engine written in pure Python. It provides a
+non-XML syntax that supports inline expressions and an optional
+sandboxed environment.
+"""
+from markupsafe import escape
+from markupsafe import Markup
+
+from .bccache import BytecodeCache
+from .bccache import FileSystemBytecodeCache
+from .bccache import MemcachedBytecodeCache
+from .environment import Environment
+from .environment import Template
+from .exceptions import TemplateAssertionError
+from .exceptions import TemplateError
+from .exceptions import TemplateNotFound
+from .exceptions import TemplateRuntimeError
+from .exceptions import TemplatesNotFound
+from .exceptions import TemplateSyntaxError
+from .exceptions import UndefinedError
+from .filters import contextfilter
+from .filters import environmentfilter
+from .filters import evalcontextfilter
+from .loaders import BaseLoader
+from .loaders import ChoiceLoader
+from .loaders import DictLoader
+from .loaders import FileSystemLoader
+from .loaders import FunctionLoader
+from .loaders import ModuleLoader
+from .loaders import PackageLoader
+from .loaders import PrefixLoader
+from .runtime import ChainableUndefined
+from .runtime import DebugUndefined
+from .runtime import make_logging_undefined
+from .runtime import StrictUndefined
+from .runtime import Undefined
+from .utils import clear_caches
+from .utils import contextfunction
+from .utils import environmentfunction
+from .utils import evalcontextfunction
+from .utils import is_undefined
+from .utils import select_autoescape
+
+__version__ = "2.11.2"
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diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/_compat.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/_compat.py
new file mode 100644
index 0000000..1f04495
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/_compat.py
@@ -0,0 +1,132 @@
+# -*- coding: utf-8 -*-
+# flake8: noqa
+import marshal
+import sys
+
+PY2 = sys.version_info[0] == 2
+PYPY = hasattr(sys, "pypy_translation_info")
+_identity = lambda x: x
+
+if not PY2:
+    unichr = chr
+    range_type = range
+    text_type = str
+    string_types = (str,)
+    integer_types = (int,)
+
+    iterkeys = lambda d: iter(d.keys())
+    itervalues = lambda d: iter(d.values())
+    iteritems = lambda d: iter(d.items())
+
+    import pickle
+    from io import BytesIO, StringIO
+
+    NativeStringIO = StringIO
+
+    def reraise(tp, value, tb=None):
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+    ifilter = filter
+    imap = map
+    izip = zip
+    intern = sys.intern
+
+    implements_iterator = _identity
+    implements_to_string = _identity
+    encode_filename = _identity
+
+    marshal_dump = marshal.dump
+    marshal_load = marshal.load
+
+else:
+    unichr = unichr
+    text_type = unicode
+    range_type = xrange
+    string_types = (str, unicode)
+    integer_types = (int, long)
+
+    iterkeys = lambda d: d.iterkeys()
+    itervalues = lambda d: d.itervalues()
+    iteritems = lambda d: d.iteritems()
+
+    import cPickle as pickle
+    from cStringIO import StringIO as BytesIO, StringIO
+
+    NativeStringIO = BytesIO
+
+    exec("def reraise(tp, value, tb=None):\n raise tp, value, tb")
+
+    from itertools import imap, izip, ifilter
+
+    intern = intern
+
+    def implements_iterator(cls):
+        cls.next = cls.__next__
+        del cls.__next__
+        return cls
+
+    def implements_to_string(cls):
+        cls.__unicode__ = cls.__str__
+        cls.__str__ = lambda x: x.__unicode__().encode("utf-8")
+        return cls
+
+    def encode_filename(filename):
+        if isinstance(filename, unicode):
+            return filename.encode("utf-8")
+        return filename
+
+    def marshal_dump(code, f):
+        if isinstance(f, file):
+            marshal.dump(code, f)
+        else:
+            f.write(marshal.dumps(code))
+
+    def marshal_load(f):
+        if isinstance(f, file):
+            return marshal.load(f)
+        return marshal.loads(f.read())
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a
+    # dummy metaclass for one level of class instantiation that replaces
+    # itself with the actual metaclass.
+    class metaclass(type):
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+
+    return type.__new__(metaclass, "temporary_class", (), {})
+
+
+try:
+    from urllib.parse import quote_from_bytes as url_quote
+except ImportError:
+    from urllib import quote as url_quote
+
+
+try:
+    from collections import abc
+except ImportError:
+    import collections as abc
+
+
+try:
+    from os import fspath
+except ImportError:
+    try:
+        from pathlib import PurePath
+    except ImportError:
+        PurePath = None
+
+    def fspath(path):
+        if hasattr(path, "__fspath__"):
+            return path.__fspath__()
+
+        # Python 3.5 doesn't have __fspath__ yet, use str.
+        if PurePath is not None and isinstance(path, PurePath):
+            return str(path)
+
+        return path
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/_identifier.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/_identifier.py
new file mode 100644
index 0000000..224d544
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/_identifier.py
@@ -0,0 +1,6 @@
+import re
+
+# generated by scripts/generate_identifier_pattern.py
+pattern = re.compile(
+    r"[\w·̀-ͯ·҃-֑҇-ׇֽֿׁׂׅׄؐ-ًؚ-ٰٟۖ-ۜ۟-۪ۤۧۨ-ܑۭܰ-݊ަ-ް߫-߳ࠖ-࠙ࠛ-ࠣࠥ-ࠧࠩ-࡙࠭-࡛ࣔ-ࣣ࣡-ःऺ-़ा-ॏ॑-ॗॢॣঁ-ঃ়া-ৄেৈো-্ৗৢৣਁ-ਃ਼ਾ-ੂੇੈੋ-੍ੑੰੱੵઁ-ઃ઼ા-ૅે-ૉો-્ૢૣଁ-ଃ଼ା-ୄେୈୋ-୍ୖୗୢୣஂா-ூெ-ைொ-்ௗఀ-ఃా-ౄె-ైొ-్ౕౖౢౣಁ-ಃ಼ಾ-ೄೆ-ೈೊ-್ೕೖೢೣഁ-ഃാ-ൄെ-ൈൊ-്ൗൢൣංඃ්ා-ුූෘ-ෟෲෳัิ-ฺ็-๎ັິ-ູົຼ່-ໍ༹༘༙༵༷༾༿ཱ-྄྆྇ྍ-ྗྙ-ྼ࿆ါ-ှၖ-ၙၞ-ၠၢ-ၤၧ-ၭၱ-ၴႂ-ႍႏႚ-ႝ፝-፟ᜒ-᜔ᜲ-᜴ᝒᝓᝲᝳ឴-៓៝᠋-᠍ᢅᢆᢩᤠ-ᤫᤰ-᤻ᨗ-ᨛᩕ-ᩞ᩠-᩿᩼᪰-᪽ᬀ-ᬄ᬴-᭄᭫-᭳ᮀ-ᮂᮡ-ᮭ᯦-᯳ᰤ-᰷᳐-᳔᳒-᳨᳭ᳲ-᳴᳸᳹᷀-᷵᷻-᷿‿⁀⁔⃐-⃥⃜⃡-⃰℘℮⳯-⵿⳱ⷠ-〪ⷿ-゙゚〯꙯ꙴ-꙽ꚞꚟ꛰꛱ꠂ꠆ꠋꠣ-ꠧꢀꢁꢴ-ꣅ꣠-꣱ꤦ-꤭ꥇ-꥓ꦀ-ꦃ꦳-꧀ꧥꨩ-ꨶꩃꩌꩍꩻ-ꩽꪰꪲ-ꪴꪷꪸꪾ꪿꫁ꫫ-ꫯꫵ꫶ꯣ-ꯪ꯬꯭ﬞ︀-️︠-︯︳︴﹍-﹏＿𐇽𐋠𐍶-𐍺𐨁-𐨃𐨅𐨆𐨌-𐨏𐨸-𐨿𐨺𐫦𐫥𑀀-𑀂𑀸-𑁆𑁿-𑂂𑂰-𑂺𑄀-𑄂𑄧-𑅳𑄴𑆀-𑆂𑆳-𑇊𑇀-𑇌𑈬-𑈷𑈾𑋟-𑋪𑌀-𑌃𑌼𑌾-𑍄𑍇𑍈𑍋-𑍍𑍗𑍢𑍣𑍦-𑍬𑍰-𑍴𑐵-𑑆𑒰-𑓃𑖯-𑖵𑖸-𑗀𑗜𑗝𑘰-𑙀𑚫-𑚷𑜝-𑜫𑰯-𑰶𑰸-𑰿𑲒-𑲧𑲩-𑲶𖫰-𖫴𖬰-𖬶𖽑-𖽾𖾏-𖾒𛲝𛲞𝅥-𝅩𝅭-𝅲𝅻-𝆂𝆅-𝆋𝆪-𝆭𝉂-𝉄𝨀-𝨶𝨻-𝩬𝩵𝪄𝪛-𝪟𝪡-𝪯𞀀-𞀆𞀈-𞀘𞀛-𞀡𞀣𞀤𞀦-𞣐𞀪-𞣖𞥄-𞥊󠄀-󠇯]+"  # noqa: B950
+)
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/asyncfilters.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/asyncfilters.py
new file mode 100644
index 0000000..3d98dbc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/asyncfilters.py
@@ -0,0 +1,158 @@
+from functools import wraps
+
+from . import filters
+from .asyncsupport import auto_aiter
+from .asyncsupport import auto_await
+
+
+async def auto_to_seq(value):
+    seq = []
+    if hasattr(value, "__aiter__"):
+        async for item in value:
+            seq.append(item)
+    else:
+        for item in value:
+            seq.append(item)
+    return seq
+
+
+async def async_select_or_reject(args, kwargs, modfunc, lookup_attr):
+    seq, func = filters.prepare_select_or_reject(args, kwargs, modfunc, lookup_attr)
+    if seq:
+        async for item in auto_aiter(seq):
+            if func(item):
+                yield item
+
+
+def dualfilter(normal_filter, async_filter):
+    wrap_evalctx = False
+    if getattr(normal_filter, "environmentfilter", False) is True:
+
+        def is_async(args):
+            return args[0].is_async
+
+        wrap_evalctx = False
+    else:
+        has_evalctxfilter = getattr(normal_filter, "evalcontextfilter", False) is True
+        has_ctxfilter = getattr(normal_filter, "contextfilter", False) is True
+        wrap_evalctx = not has_evalctxfilter and not has_ctxfilter
+
+        def is_async(args):
+            return args[0].environment.is_async
+
+    @wraps(normal_filter)
+    def wrapper(*args, **kwargs):
+        b = is_async(args)
+        if wrap_evalctx:
+            args = args[1:]
+        if b:
+            return async_filter(*args, **kwargs)
+        return normal_filter(*args, **kwargs)
+
+    if wrap_evalctx:
+        wrapper.evalcontextfilter = True
+
+    wrapper.asyncfiltervariant = True
+
+    return wrapper
+
+
+def asyncfiltervariant(original):
+    def decorator(f):
+        return dualfilter(original, f)
+
+    return decorator
+
+
+@asyncfiltervariant(filters.do_first)
+async def do_first(environment, seq):
+    try:
+        return await auto_aiter(seq).__anext__()
+    except StopAsyncIteration:
+        return environment.undefined("No first item, sequence was empty.")
+
+
+@asyncfiltervariant(filters.do_groupby)
+async def do_groupby(environment, value, attribute):
+    expr = filters.make_attrgetter(environment, attribute)
+    return [
+        filters._GroupTuple(key, await auto_to_seq(values))
+        for key, values in filters.groupby(
+            sorted(await auto_to_seq(value), key=expr), expr
+        )
+    ]
+
+
+@asyncfiltervariant(filters.do_join)
+async def do_join(eval_ctx, value, d=u"", attribute=None):
+    return filters.do_join(eval_ctx, await auto_to_seq(value), d, attribute)
+
+
+@asyncfiltervariant(filters.do_list)
+async def do_list(value):
+    return await auto_to_seq(value)
+
+
+@asyncfiltervariant(filters.do_reject)
+async def do_reject(*args, **kwargs):
+    return async_select_or_reject(args, kwargs, lambda x: not x, False)
+
+
+@asyncfiltervariant(filters.do_rejectattr)
+async def do_rejectattr(*args, **kwargs):
+    return async_select_or_reject(args, kwargs, lambda x: not x, True)
+
+
+@asyncfiltervariant(filters.do_select)
+async def do_select(*args, **kwargs):
+    return async_select_or_reject(args, kwargs, lambda x: x, False)
+
+
+@asyncfiltervariant(filters.do_selectattr)
+async def do_selectattr(*args, **kwargs):
+    return async_select_or_reject(args, kwargs, lambda x: x, True)
+
+
+@asyncfiltervariant(filters.do_map)
+async def do_map(*args, **kwargs):
+    seq, func = filters.prepare_map(args, kwargs)
+    if seq:
+        async for item in auto_aiter(seq):
+            yield await auto_await(func(item))
+
+
+@asyncfiltervariant(filters.do_sum)
+async def do_sum(environment, iterable, attribute=None, start=0):
+    rv = start
+    if attribute is not None:
+        func = filters.make_attrgetter(environment, attribute)
+    else:
+
+        def func(x):
+            return x
+
+    async for item in auto_aiter(iterable):
+        rv += func(item)
+    return rv
+
+
+@asyncfiltervariant(filters.do_slice)
+async def do_slice(value, slices, fill_with=None):
+    return filters.do_slice(await auto_to_seq(value), slices, fill_with)
+
+
+ASYNC_FILTERS = {
+    "first": do_first,
+    "groupby": do_groupby,
+    "join": do_join,
+    "list": do_list,
+    # we intentionally do not support do_last because that would be
+    # ridiculous
+    "reject": do_reject,
+    "rejectattr": do_rejectattr,
+    "map": do_map,
+    "select": do_select,
+    "selectattr": do_selectattr,
+    "sum": do_sum,
+    "slice": do_slice,
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/asyncsupport.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/asyncsupport.py
new file mode 100644
index 0000000..78ba373
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/asyncsupport.py
@@ -0,0 +1,264 @@
+# -*- coding: utf-8 -*-
+"""The code for async support. Importing this patches Jinja on supported
+Python versions.
+"""
+import asyncio
+import inspect
+from functools import update_wrapper
+
+from markupsafe import Markup
+
+from .environment import TemplateModule
+from .runtime import LoopContext
+from .utils import concat
+from .utils import internalcode
+from .utils import missing
+
+
+async def concat_async(async_gen):
+    rv = []
+
+    async def collect():
+        async for event in async_gen:
+            rv.append(event)
+
+    await collect()
+    return concat(rv)
+
+
+async def generate_async(self, *args, **kwargs):
+    vars = dict(*args, **kwargs)
+    try:
+        async for event in self.root_render_func(self.new_context(vars)):
+            yield event
+    except Exception:
+        yield self.environment.handle_exception()
+
+
+def wrap_generate_func(original_generate):
+    def _convert_generator(self, loop, args, kwargs):
+        async_gen = self.generate_async(*args, **kwargs)
+        try:
+            while 1:
+                yield loop.run_until_complete(async_gen.__anext__())
+        except StopAsyncIteration:
+            pass
+
+    def generate(self, *args, **kwargs):
+        if not self.environment.is_async:
+            return original_generate(self, *args, **kwargs)
+        return _convert_generator(self, asyncio.get_event_loop(), args, kwargs)
+
+    return update_wrapper(generate, original_generate)
+
+
+async def render_async(self, *args, **kwargs):
+    if not self.environment.is_async:
+        raise RuntimeError("The environment was not created with async mode enabled.")
+
+    vars = dict(*args, **kwargs)
+    ctx = self.new_context(vars)
+
+    try:
+        return await concat_async(self.root_render_func(ctx))
+    except Exception:
+        return self.environment.handle_exception()
+
+
+def wrap_render_func(original_render):
+    def render(self, *args, **kwargs):
+        if not self.environment.is_async:
+            return original_render(self, *args, **kwargs)
+        loop = asyncio.get_event_loop()
+        return loop.run_until_complete(self.render_async(*args, **kwargs))
+
+    return update_wrapper(render, original_render)
+
+
+def wrap_block_reference_call(original_call):
+    @internalcode
+    async def async_call(self):
+        rv = await concat_async(self._stack[self._depth](self._context))
+        if self._context.eval_ctx.autoescape:
+            rv = Markup(rv)
+        return rv
+
+    @internalcode
+    def __call__(self):
+        if not self._context.environment.is_async:
+            return original_call(self)
+        return async_call(self)
+
+    return update_wrapper(__call__, original_call)
+
+
+def wrap_macro_invoke(original_invoke):
+    @internalcode
+    async def async_invoke(self, arguments, autoescape):
+        rv = await self._func(*arguments)
+        if autoescape:
+            rv = Markup(rv)
+        return rv
+
+    @internalcode
+    def _invoke(self, arguments, autoescape):
+        if not self._environment.is_async:
+            return original_invoke(self, arguments, autoescape)
+        return async_invoke(self, arguments, autoescape)
+
+    return update_wrapper(_invoke, original_invoke)
+
+
+@internalcode
+async def get_default_module_async(self):
+    if self._module is not None:
+        return self._module
+    self._module = rv = await self.make_module_async()
+    return rv
+
+
+def wrap_default_module(original_default_module):
+    @internalcode
+    def _get_default_module(self):
+        if self.environment.is_async:
+            raise RuntimeError("Template module attribute is unavailable in async mode")
+        return original_default_module(self)
+
+    return _get_default_module
+
+
+async def make_module_async(self, vars=None, shared=False, locals=None):
+    context = self.new_context(vars, shared, locals)
+    body_stream = []
+    async for item in self.root_render_func(context):
+        body_stream.append(item)
+    return TemplateModule(self, context, body_stream)
+
+
+def patch_template():
+    from . import Template
+
+    Template.generate = wrap_generate_func(Template.generate)
+    Template.generate_async = update_wrapper(generate_async, Template.generate_async)
+    Template.render_async = update_wrapper(render_async, Template.render_async)
+    Template.render = wrap_render_func(Template.render)
+    Template._get_default_module = wrap_default_module(Template._get_default_module)
+    Template._get_default_module_async = get_default_module_async
+    Template.make_module_async = update_wrapper(
+        make_module_async, Template.make_module_async
+    )
+
+
+def patch_runtime():
+    from .runtime import BlockReference, Macro
+
+    BlockReference.__call__ = wrap_block_reference_call(BlockReference.__call__)
+    Macro._invoke = wrap_macro_invoke(Macro._invoke)
+
+
+def patch_filters():
+    from .filters import FILTERS
+    from .asyncfilters import ASYNC_FILTERS
+
+    FILTERS.update(ASYNC_FILTERS)
+
+
+def patch_all():
+    patch_template()
+    patch_runtime()
+    patch_filters()
+
+
+async def auto_await(value):
+    if inspect.isawaitable(value):
+        return await value
+    return value
+
+
+async def auto_aiter(iterable):
+    if hasattr(iterable, "__aiter__"):
+        async for item in iterable:
+            yield item
+        return
+    for item in iterable:
+        yield item
+
+
+class AsyncLoopContext(LoopContext):
+    _to_iterator = staticmethod(auto_aiter)
+
+    @property
+    async def length(self):
+        if self._length is not None:
+            return self._length
+
+        try:
+            self._length = len(self._iterable)
+        except TypeError:
+            iterable = [x async for x in self._iterator]
+            self._iterator = self._to_iterator(iterable)
+            self._length = len(iterable) + self.index + (self._after is not missing)
+
+        return self._length
+
+    @property
+    async def revindex0(self):
+        return await self.length - self.index
+
+    @property
+    async def revindex(self):
+        return await self.length - self.index0
+
+    async def _peek_next(self):
+        if self._after is not missing:
+            return self._after
+
+        try:
+            self._after = await self._iterator.__anext__()
+        except StopAsyncIteration:
+            self._after = missing
+
+        return self._after
+
+    @property
+    async def last(self):
+        return await self._peek_next() is missing
+
+    @property
+    async def nextitem(self):
+        rv = await self._peek_next()
+
+        if rv is missing:
+            return self._undefined("there is no next item")
+
+        return rv
+
+    def __aiter__(self):
+        return self
+
+    async def __anext__(self):
+        if self._after is not missing:
+            rv = self._after
+            self._after = missing
+        else:
+            rv = await self._iterator.__anext__()
+
+        self.index0 += 1
+        self._before = self._current
+        self._current = rv
+        return rv, self
+
+
+async def make_async_loop_context(iterable, undefined, recurse=None, depth0=0):
+    import warnings
+
+    warnings.warn(
+        "This template must be recompiled with at least Jinja 2.11, or"
+        " it will fail in 3.0.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return AsyncLoopContext(iterable, undefined, recurse, depth0)
+
+
+patch_all()
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/bccache.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/bccache.py
new file mode 100644
index 0000000..9c06610
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/bccache.py
@@ -0,0 +1,350 @@
+# -*- coding: utf-8 -*-
+"""The optional bytecode cache system. This is useful if you have very
+complex template situations and the compilation of all those templates
+slows down your application too much.
+
+Situations where this is useful are often forking web applications that
+are initialized on the first request.
+"""
+import errno
+import fnmatch
+import os
+import stat
+import sys
+import tempfile
+from hashlib import sha1
+from os import listdir
+from os import path
+
+from ._compat import BytesIO
+from ._compat import marshal_dump
+from ._compat import marshal_load
+from ._compat import pickle
+from ._compat import text_type
+from .utils import open_if_exists
+
+bc_version = 4
+# Magic bytes to identify Jinja bytecode cache files. Contains the
+# Python major and minor version to avoid loading incompatible bytecode
+# if a project upgrades its Python version.
+bc_magic = (
+    b"j2"
+    + pickle.dumps(bc_version, 2)
+    + pickle.dumps((sys.version_info[0] << 24) | sys.version_info[1], 2)
+)
+
+
+class Bucket(object):
+    """Buckets are used to store the bytecode for one template.  It's created
+    and initialized by the bytecode cache and passed to the loading functions.
+
+    The buckets get an internal checksum from the cache assigned and use this
+    to automatically reject outdated cache material.  Individual bytecode
+    cache subclasses don't have to care about cache invalidation.
+    """
+
+    def __init__(self, environment, key, checksum):
+        self.environment = environment
+        self.key = key
+        self.checksum = checksum
+        self.reset()
+
+    def reset(self):
+        """Resets the bucket (unloads the bytecode)."""
+        self.code = None
+
+    def load_bytecode(self, f):
+        """Loads bytecode from a file or file like object."""
+        # make sure the magic header is correct
+        magic = f.read(len(bc_magic))
+        if magic != bc_magic:
+            self.reset()
+            return
+        # the source code of the file changed, we need to reload
+        checksum = pickle.load(f)
+        if self.checksum != checksum:
+            self.reset()
+            return
+        # if marshal_load fails then we need to reload
+        try:
+            self.code = marshal_load(f)
+        except (EOFError, ValueError, TypeError):
+            self.reset()
+            return
+
+    def write_bytecode(self, f):
+        """Dump the bytecode into the file or file like object passed."""
+        if self.code is None:
+            raise TypeError("can't write empty bucket")
+        f.write(bc_magic)
+        pickle.dump(self.checksum, f, 2)
+        marshal_dump(self.code, f)
+
+    def bytecode_from_string(self, string):
+        """Load bytecode from a string."""
+        self.load_bytecode(BytesIO(string))
+
+    def bytecode_to_string(self):
+        """Return the bytecode as string."""
+        out = BytesIO()
+        self.write_bytecode(out)
+        return out.getvalue()
+
+
+class BytecodeCache(object):
+    """To implement your own bytecode cache you have to subclass this class
+    and override :meth:`load_bytecode` and :meth:`dump_bytecode`.  Both of
+    these methods are passed a :class:`~jinja2.bccache.Bucket`.
+
+    A very basic bytecode cache that saves the bytecode on the file system::
+
+        from os import path
+
+        class MyCache(BytecodeCache):
+
+            def __init__(self, directory):
+                self.directory = directory
+
+            def load_bytecode(self, bucket):
+                filename = path.join(self.directory, bucket.key)
+                if path.exists(filename):
+                    with open(filename, 'rb') as f:
+                        bucket.load_bytecode(f)
+
+            def dump_bytecode(self, bucket):
+                filename = path.join(self.directory, bucket.key)
+                with open(filename, 'wb') as f:
+                    bucket.write_bytecode(f)
+
+    A more advanced version of a filesystem based bytecode cache is part of
+    Jinja.
+    """
+
+    def load_bytecode(self, bucket):
+        """Subclasses have to override this method to load bytecode into a
+        bucket.  If they are not able to find code in the cache for the
+        bucket, it must not do anything.
+        """
+        raise NotImplementedError()
+
+    def dump_bytecode(self, bucket):
+        """Subclasses have to override this method to write the bytecode
+        from a bucket back to the cache.  If it unable to do so it must not
+        fail silently but raise an exception.
+        """
+        raise NotImplementedError()
+
+    def clear(self):
+        """Clears the cache.  This method is not used by Jinja but should be
+        implemented to allow applications to clear the bytecode cache used
+        by a particular environment.
+        """
+
+    def get_cache_key(self, name, filename=None):
+        """Returns the unique hash key for this template name."""
+        hash = sha1(name.encode("utf-8"))
+        if filename is not None:
+            filename = "|" + filename
+            if isinstance(filename, text_type):
+                filename = filename.encode("utf-8")
+            hash.update(filename)
+        return hash.hexdigest()
+
+    def get_source_checksum(self, source):
+        """Returns a checksum for the source."""
+        return sha1(source.encode("utf-8")).hexdigest()
+
+    def get_bucket(self, environment, name, filename, source):
+        """Return a cache bucket for the given template.  All arguments are
+        mandatory but filename may be `None`.
+        """
+        key = self.get_cache_key(name, filename)
+        checksum = self.get_source_checksum(source)
+        bucket = Bucket(environment, key, checksum)
+        self.load_bytecode(bucket)
+        return bucket
+
+    def set_bucket(self, bucket):
+        """Put the bucket into the cache."""
+        self.dump_bytecode(bucket)
+
+
+class FileSystemBytecodeCache(BytecodeCache):
+    """A bytecode cache that stores bytecode on the filesystem.  It accepts
+    two arguments: The directory where the cache items are stored and a
+    pattern string that is used to build the filename.
+
+    If no directory is specified a default cache directory is selected.  On
+    Windows the user's temp directory is used, on UNIX systems a directory
+    is created for the user in the system temp directory.
+
+    The pattern can be used to have multiple separate caches operate on the
+    same directory.  The default pattern is ``'__jinja2_%s.cache'``.  ``%s``
+    is replaced with the cache key.
+
+    >>> bcc = FileSystemBytecodeCache('/tmp/jinja_cache', '%s.cache')
+
+    This bytecode cache supports clearing of the cache using the clear method.
+    """
+
+    def __init__(self, directory=None, pattern="__jinja2_%s.cache"):
+        if directory is None:
+            directory = self._get_default_cache_dir()
+        self.directory = directory
+        self.pattern = pattern
+
+    def _get_default_cache_dir(self):
+        def _unsafe_dir():
+            raise RuntimeError(
+                "Cannot determine safe temp directory.  You "
+                "need to explicitly provide one."
+            )
+
+        tmpdir = tempfile.gettempdir()
+
+        # On windows the temporary directory is used specific unless
+        # explicitly forced otherwise.  We can just use that.
+        if os.name == "nt":
+            return tmpdir
+        if not hasattr(os, "getuid"):
+            _unsafe_dir()
+
+        dirname = "_jinja2-cache-%d" % os.getuid()
+        actual_dir = os.path.join(tmpdir, dirname)
+
+        try:
+            os.mkdir(actual_dir, stat.S_IRWXU)
+        except OSError as e:
+            if e.errno != errno.EEXIST:
+                raise
+        try:
+            os.chmod(actual_dir, stat.S_IRWXU)
+            actual_dir_stat = os.lstat(actual_dir)
+            if (
+                actual_dir_stat.st_uid != os.getuid()
+                or not stat.S_ISDIR(actual_dir_stat.st_mode)
+                or stat.S_IMODE(actual_dir_stat.st_mode) != stat.S_IRWXU
+            ):
+                _unsafe_dir()
+        except OSError as e:
+            if e.errno != errno.EEXIST:
+                raise
+
+        actual_dir_stat = os.lstat(actual_dir)
+        if (
+            actual_dir_stat.st_uid != os.getuid()
+            or not stat.S_ISDIR(actual_dir_stat.st_mode)
+            or stat.S_IMODE(actual_dir_stat.st_mode) != stat.S_IRWXU
+        ):
+            _unsafe_dir()
+
+        return actual_dir
+
+    def _get_cache_filename(self, bucket):
+        return path.join(self.directory, self.pattern % bucket.key)
+
+    def load_bytecode(self, bucket):
+        f = open_if_exists(self._get_cache_filename(bucket), "rb")
+        if f is not None:
+            try:
+                bucket.load_bytecode(f)
+            finally:
+                f.close()
+
+    def dump_bytecode(self, bucket):
+        f = open(self._get_cache_filename(bucket), "wb")
+        try:
+            bucket.write_bytecode(f)
+        finally:
+            f.close()
+
+    def clear(self):
+        # imported lazily here because google app-engine doesn't support
+        # write access on the file system and the function does not exist
+        # normally.
+        from os import remove
+
+        files = fnmatch.filter(listdir(self.directory), self.pattern % "*")
+        for filename in files:
+            try:
+                remove(path.join(self.directory, filename))
+            except OSError:
+                pass
+
+
+class MemcachedBytecodeCache(BytecodeCache):
+    """This class implements a bytecode cache that uses a memcache cache for
+    storing the information.  It does not enforce a specific memcache library
+    (tummy's memcache or cmemcache) but will accept any class that provides
+    the minimal interface required.
+
+    Libraries compatible with this class:
+
+    -   `cachelib <https://github.com/pallets/cachelib>`_
+    -   `python-memcached <https://pypi.org/project/python-memcached/>`_
+
+    (Unfortunately the django cache interface is not compatible because it
+    does not support storing binary data, only unicode.  You can however pass
+    the underlying cache client to the bytecode cache which is available
+    as `django.core.cache.cache._client`.)
+
+    The minimal interface for the client passed to the constructor is this:
+
+    .. class:: MinimalClientInterface
+
+        .. method:: set(key, value[, timeout])
+
+            Stores the bytecode in the cache.  `value` is a string and
+            `timeout` the timeout of the key.  If timeout is not provided
+            a default timeout or no timeout should be assumed, if it's
+            provided it's an integer with the number of seconds the cache
+            item should exist.
+
+        .. method:: get(key)
+
+            Returns the value for the cache key.  If the item does not
+            exist in the cache the return value must be `None`.
+
+    The other arguments to the constructor are the prefix for all keys that
+    is added before the actual cache key and the timeout for the bytecode in
+    the cache system.  We recommend a high (or no) timeout.
+
+    This bytecode cache does not support clearing of used items in the cache.
+    The clear method is a no-operation function.
+
+    .. versionadded:: 2.7
+       Added support for ignoring memcache errors through the
+       `ignore_memcache_errors` parameter.
+    """
+
+    def __init__(
+        self,
+        client,
+        prefix="jinja2/bytecode/",
+        timeout=None,
+        ignore_memcache_errors=True,
+    ):
+        self.client = client
+        self.prefix = prefix
+        self.timeout = timeout
+        self.ignore_memcache_errors = ignore_memcache_errors
+
+    def load_bytecode(self, bucket):
+        try:
+            code = self.client.get(self.prefix + bucket.key)
+        except Exception:
+            if not self.ignore_memcache_errors:
+                raise
+            code = None
+        if code is not None:
+            bucket.bytecode_from_string(code)
+
+    def dump_bytecode(self, bucket):
+        args = (self.prefix + bucket.key, bucket.bytecode_to_string())
+        if self.timeout is not None:
+            args += (self.timeout,)
+        try:
+            self.client.set(*args)
+        except Exception:
+            if not self.ignore_memcache_errors:
+                raise
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/compiler.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/compiler.py
new file mode 100644
index 0000000..63297b4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/compiler.py
@@ -0,0 +1,1843 @@
+# -*- coding: utf-8 -*-
+"""Compiles nodes from the parser into Python code."""
+from collections import namedtuple
+from functools import update_wrapper
+from itertools import chain
+from keyword import iskeyword as is_python_keyword
+
+from markupsafe import escape
+from markupsafe import Markup
+
+from . import nodes
+from ._compat import imap
+from ._compat import iteritems
+from ._compat import izip
+from ._compat import NativeStringIO
+from ._compat import range_type
+from ._compat import string_types
+from ._compat import text_type
+from .exceptions import TemplateAssertionError
+from .idtracking import Symbols
+from .idtracking import VAR_LOAD_ALIAS
+from .idtracking import VAR_LOAD_PARAMETER
+from .idtracking import VAR_LOAD_RESOLVE
+from .idtracking import VAR_LOAD_UNDEFINED
+from .nodes import EvalContext
+from .optimizer import Optimizer
+from .utils import concat
+from .visitor import NodeVisitor
+
+operators = {
+    "eq": "==",
+    "ne": "!=",
+    "gt": ">",
+    "gteq": ">=",
+    "lt": "<",
+    "lteq": "<=",
+    "in": "in",
+    "notin": "not in",
+}
+
+# what method to iterate over items do we want to use for dict iteration
+# in generated code?  on 2.x let's go with iteritems, on 3.x with items
+if hasattr(dict, "iteritems"):
+    dict_item_iter = "iteritems"
+else:
+    dict_item_iter = "items"
+
+code_features = ["division"]
+
+# does this python version support generator stops? (PEP 0479)
+try:
+    exec("from __future__ import generator_stop")
+    code_features.append("generator_stop")
+except SyntaxError:
+    pass
+
+# does this python version support yield from?
+try:
+    exec("def f(): yield from x()")
+except SyntaxError:
+    supports_yield_from = False
+else:
+    supports_yield_from = True
+
+
+def optimizeconst(f):
+    def new_func(self, node, frame, **kwargs):
+        # Only optimize if the frame is not volatile
+        if self.optimized and not frame.eval_ctx.volatile:
+            new_node = self.optimizer.visit(node, frame.eval_ctx)
+            if new_node != node:
+                return self.visit(new_node, frame)
+        return f(self, node, frame, **kwargs)
+
+    return update_wrapper(new_func, f)
+
+
+def generate(
+    node, environment, name, filename, stream=None, defer_init=False, optimized=True
+):
+    """Generate the python source for a node tree."""
+    if not isinstance(node, nodes.Template):
+        raise TypeError("Can't compile non template nodes")
+    generator = environment.code_generator_class(
+        environment, name, filename, stream, defer_init, optimized
+    )
+    generator.visit(node)
+    if stream is None:
+        return generator.stream.getvalue()
+
+
+def has_safe_repr(value):
+    """Does the node have a safe representation?"""
+    if value is None or value is NotImplemented or value is Ellipsis:
+        return True
+    if type(value) in (bool, int, float, complex, range_type, Markup) + string_types:
+        return True
+    if type(value) in (tuple, list, set, frozenset):
+        for item in value:
+            if not has_safe_repr(item):
+                return False
+        return True
+    elif type(value) is dict:
+        for key, value in iteritems(value):
+            if not has_safe_repr(key):
+                return False
+            if not has_safe_repr(value):
+                return False
+        return True
+    return False
+
+
+def find_undeclared(nodes, names):
+    """Check if the names passed are accessed undeclared.  The return value
+    is a set of all the undeclared names from the sequence of names found.
+    """
+    visitor = UndeclaredNameVisitor(names)
+    try:
+        for node in nodes:
+            visitor.visit(node)
+    except VisitorExit:
+        pass
+    return visitor.undeclared
+
+
+class MacroRef(object):
+    def __init__(self, node):
+        self.node = node
+        self.accesses_caller = False
+        self.accesses_kwargs = False
+        self.accesses_varargs = False
+
+
+class Frame(object):
+    """Holds compile time information for us."""
+
+    def __init__(self, eval_ctx, parent=None, level=None):
+        self.eval_ctx = eval_ctx
+        self.symbols = Symbols(parent and parent.symbols or None, level=level)
+
+        # a toplevel frame is the root + soft frames such as if conditions.
+        self.toplevel = False
+
+        # the root frame is basically just the outermost frame, so no if
+        # conditions.  This information is used to optimize inheritance
+        # situations.
+        self.rootlevel = False
+
+        # in some dynamic inheritance situations the compiler needs to add
+        # write tests around output statements.
+        self.require_output_check = parent and parent.require_output_check
+
+        # inside some tags we are using a buffer rather than yield statements.
+        # this for example affects {% filter %} or {% macro %}.  If a frame
+        # is buffered this variable points to the name of the list used as
+        # buffer.
+        self.buffer = None
+
+        # the name of the block we're in, otherwise None.
+        self.block = parent and parent.block or None
+
+        # the parent of this frame
+        self.parent = parent
+
+        if parent is not None:
+            self.buffer = parent.buffer
+
+    def copy(self):
+        """Create a copy of the current one."""
+        rv = object.__new__(self.__class__)
+        rv.__dict__.update(self.__dict__)
+        rv.symbols = self.symbols.copy()
+        return rv
+
+    def inner(self, isolated=False):
+        """Return an inner frame."""
+        if isolated:
+            return Frame(self.eval_ctx, level=self.symbols.level + 1)
+        return Frame(self.eval_ctx, self)
+
+    def soft(self):
+        """Return a soft frame.  A soft frame may not be modified as
+        standalone thing as it shares the resources with the frame it
+        was created of, but it's not a rootlevel frame any longer.
+
+        This is only used to implement if-statements.
+        """
+        rv = self.copy()
+        rv.rootlevel = False
+        return rv
+
+    __copy__ = copy
+
+
+class VisitorExit(RuntimeError):
+    """Exception used by the `UndeclaredNameVisitor` to signal a stop."""
+
+
+class DependencyFinderVisitor(NodeVisitor):
+    """A visitor that collects filter and test calls."""
+
+    def __init__(self):
+        self.filters = set()
+        self.tests = set()
+
+    def visit_Filter(self, node):
+        self.generic_visit(node)
+        self.filters.add(node.name)
+
+    def visit_Test(self, node):
+        self.generic_visit(node)
+        self.tests.add(node.name)
+
+    def visit_Block(self, node):
+        """Stop visiting at blocks."""
+
+
+class UndeclaredNameVisitor(NodeVisitor):
+    """A visitor that checks if a name is accessed without being
+    declared.  This is different from the frame visitor as it will
+    not stop at closure frames.
+    """
+
+    def __init__(self, names):
+        self.names = set(names)
+        self.undeclared = set()
+
+    def visit_Name(self, node):
+        if node.ctx == "load" and node.name in self.names:
+            self.undeclared.add(node.name)
+            if self.undeclared == self.names:
+                raise VisitorExit()
+        else:
+            self.names.discard(node.name)
+
+    def visit_Block(self, node):
+        """Stop visiting a blocks."""
+
+
+class CompilerExit(Exception):
+    """Raised if the compiler encountered a situation where it just
+    doesn't make sense to further process the code.  Any block that
+    raises such an exception is not further processed.
+    """
+
+
+class CodeGenerator(NodeVisitor):
+    def __init__(
+        self, environment, name, filename, stream=None, defer_init=False, optimized=True
+    ):
+        if stream is None:
+            stream = NativeStringIO()
+        self.environment = environment
+        self.name = name
+        self.filename = filename
+        self.stream = stream
+        self.created_block_context = False
+        self.defer_init = defer_init
+        self.optimized = optimized
+        if optimized:
+            self.optimizer = Optimizer(environment)
+
+        # aliases for imports
+        self.import_aliases = {}
+
+        # a registry for all blocks.  Because blocks are moved out
+        # into the global python scope they are registered here
+        self.blocks = {}
+
+        # the number of extends statements so far
+        self.extends_so_far = 0
+
+        # some templates have a rootlevel extends.  In this case we
+        # can safely assume that we're a child template and do some
+        # more optimizations.
+        self.has_known_extends = False
+
+        # the current line number
+        self.code_lineno = 1
+
+        # registry of all filters and tests (global, not block local)
+        self.tests = {}
+        self.filters = {}
+
+        # the debug information
+        self.debug_info = []
+        self._write_debug_info = None
+
+        # the number of new lines before the next write()
+        self._new_lines = 0
+
+        # the line number of the last written statement
+        self._last_line = 0
+
+        # true if nothing was written so far.
+        self._first_write = True
+
+        # used by the `temporary_identifier` method to get new
+        # unique, temporary identifier
+        self._last_identifier = 0
+
+        # the current indentation
+        self._indentation = 0
+
+        # Tracks toplevel assignments
+        self._assign_stack = []
+
+        # Tracks parameter definition blocks
+        self._param_def_block = []
+
+        # Tracks the current context.
+        self._context_reference_stack = ["context"]
+
+    # -- Various compilation helpers
+
+    def fail(self, msg, lineno):
+        """Fail with a :exc:`TemplateAssertionError`."""
+        raise TemplateAssertionError(msg, lineno, self.name, self.filename)
+
+    def temporary_identifier(self):
+        """Get a new unique identifier."""
+        self._last_identifier += 1
+        return "t_%d" % self._last_identifier
+
+    def buffer(self, frame):
+        """Enable buffering for the frame from that point onwards."""
+        frame.buffer = self.temporary_identifier()
+        self.writeline("%s = []" % frame.buffer)
+
+    def return_buffer_contents(self, frame, force_unescaped=False):
+        """Return the buffer contents of the frame."""
+        if not force_unescaped:
+            if frame.eval_ctx.volatile:
+                self.writeline("if context.eval_ctx.autoescape:")
+                self.indent()
+                self.writeline("return Markup(concat(%s))" % frame.buffer)
+                self.outdent()
+                self.writeline("else:")
+                self.indent()
+                self.writeline("return concat(%s)" % frame.buffer)
+                self.outdent()
+                return
+            elif frame.eval_ctx.autoescape:
+                self.writeline("return Markup(concat(%s))" % frame.buffer)
+                return
+        self.writeline("return concat(%s)" % frame.buffer)
+
+    def indent(self):
+        """Indent by one."""
+        self._indentation += 1
+
+    def outdent(self, step=1):
+        """Outdent by step."""
+        self._indentation -= step
+
+    def start_write(self, frame, node=None):
+        """Yield or write into the frame buffer."""
+        if frame.buffer is None:
+            self.writeline("yield ", node)
+        else:
+            self.writeline("%s.append(" % frame.buffer, node)
+
+    def end_write(self, frame):
+        """End the writing process started by `start_write`."""
+        if frame.buffer is not None:
+            self.write(")")
+
+    def simple_write(self, s, frame, node=None):
+        """Simple shortcut for start_write + write + end_write."""
+        self.start_write(frame, node)
+        self.write(s)
+        self.end_write(frame)
+
+    def blockvisit(self, nodes, frame):
+        """Visit a list of nodes as block in a frame.  If the current frame
+        is no buffer a dummy ``if 0: yield None`` is written automatically.
+        """
+        try:
+            self.writeline("pass")
+            for node in nodes:
+                self.visit(node, frame)
+        except CompilerExit:
+            pass
+
+    def write(self, x):
+        """Write a string into the output stream."""
+        if self._new_lines:
+            if not self._first_write:
+                self.stream.write("\n" * self._new_lines)
+                self.code_lineno += self._new_lines
+                if self._write_debug_info is not None:
+                    self.debug_info.append((self._write_debug_info, self.code_lineno))
+                    self._write_debug_info = None
+            self._first_write = False
+            self.stream.write("    " * self._indentation)
+            self._new_lines = 0
+        self.stream.write(x)
+
+    def writeline(self, x, node=None, extra=0):
+        """Combination of newline and write."""
+        self.newline(node, extra)
+        self.write(x)
+
+    def newline(self, node=None, extra=0):
+        """Add one or more newlines before the next write."""
+        self._new_lines = max(self._new_lines, 1 + extra)
+        if node is not None and node.lineno != self._last_line:
+            self._write_debug_info = node.lineno
+            self._last_line = node.lineno
+
+    def signature(self, node, frame, extra_kwargs=None):
+        """Writes a function call to the stream for the current node.
+        A leading comma is added automatically.  The extra keyword
+        arguments may not include python keywords otherwise a syntax
+        error could occur.  The extra keyword arguments should be given
+        as python dict.
+        """
+        # if any of the given keyword arguments is a python keyword
+        # we have to make sure that no invalid call is created.
+        kwarg_workaround = False
+        for kwarg in chain((x.key for x in node.kwargs), extra_kwargs or ()):
+            if is_python_keyword(kwarg):
+                kwarg_workaround = True
+                break
+
+        for arg in node.args:
+            self.write(", ")
+            self.visit(arg, frame)
+
+        if not kwarg_workaround:
+            for kwarg in node.kwargs:
+                self.write(", ")
+                self.visit(kwarg, frame)
+            if extra_kwargs is not None:
+                for key, value in iteritems(extra_kwargs):
+                    self.write(", %s=%s" % (key, value))
+        if node.dyn_args:
+            self.write(", *")
+            self.visit(node.dyn_args, frame)
+
+        if kwarg_workaround:
+            if node.dyn_kwargs is not None:
+                self.write(", **dict({")
+            else:
+                self.write(", **{")
+            for kwarg in node.kwargs:
+                self.write("%r: " % kwarg.key)
+                self.visit(kwarg.value, frame)
+                self.write(", ")
+            if extra_kwargs is not None:
+                for key, value in iteritems(extra_kwargs):
+                    self.write("%r: %s, " % (key, value))
+            if node.dyn_kwargs is not None:
+                self.write("}, **")
+                self.visit(node.dyn_kwargs, frame)
+                self.write(")")
+            else:
+                self.write("}")
+
+        elif node.dyn_kwargs is not None:
+            self.write(", **")
+            self.visit(node.dyn_kwargs, frame)
+
+    def pull_dependencies(self, nodes):
+        """Pull all the dependencies."""
+        visitor = DependencyFinderVisitor()
+        for node in nodes:
+            visitor.visit(node)
+        for dependency in "filters", "tests":
+            mapping = getattr(self, dependency)
+            for name in getattr(visitor, dependency):
+                if name not in mapping:
+                    mapping[name] = self.temporary_identifier()
+                self.writeline(
+                    "%s = environment.%s[%r]" % (mapping[name], dependency, name)
+                )
+
+    def enter_frame(self, frame):
+        undefs = []
+        for target, (action, param) in iteritems(frame.symbols.loads):
+            if action == VAR_LOAD_PARAMETER:
+                pass
+            elif action == VAR_LOAD_RESOLVE:
+                self.writeline("%s = %s(%r)" % (target, self.get_resolve_func(), param))
+            elif action == VAR_LOAD_ALIAS:
+                self.writeline("%s = %s" % (target, param))
+            elif action == VAR_LOAD_UNDEFINED:
+                undefs.append(target)
+            else:
+                raise NotImplementedError("unknown load instruction")
+        if undefs:
+            self.writeline("%s = missing" % " = ".join(undefs))
+
+    def leave_frame(self, frame, with_python_scope=False):
+        if not with_python_scope:
+            undefs = []
+            for target, _ in iteritems(frame.symbols.loads):
+                undefs.append(target)
+            if undefs:
+                self.writeline("%s = missing" % " = ".join(undefs))
+
+    def func(self, name):
+        if self.environment.is_async:
+            return "async def %s" % name
+        return "def %s" % name
+
+    def macro_body(self, node, frame):
+        """Dump the function def of a macro or call block."""
+        frame = frame.inner()
+        frame.symbols.analyze_node(node)
+        macro_ref = MacroRef(node)
+
+        explicit_caller = None
+        skip_special_params = set()
+        args = []
+        for idx, arg in enumerate(node.args):
+            if arg.name == "caller":
+                explicit_caller = idx
+            if arg.name in ("kwargs", "varargs"):
+                skip_special_params.add(arg.name)
+            args.append(frame.symbols.ref(arg.name))
+
+        undeclared = find_undeclared(node.body, ("caller", "kwargs", "varargs"))
+
+        if "caller" in undeclared:
+            # In older Jinja versions there was a bug that allowed caller
+            # to retain the special behavior even if it was mentioned in
+            # the argument list.  However thankfully this was only really
+            # working if it was the last argument.  So we are explicitly
+            # checking this now and error out if it is anywhere else in
+            # the argument list.
+            if explicit_caller is not None:
+                try:
+                    node.defaults[explicit_caller - len(node.args)]
+                except IndexError:
+                    self.fail(
+                        "When defining macros or call blocks the "
+                        'special "caller" argument must be omitted '
+                        "or be given a default.",
+                        node.lineno,
+                    )
+            else:
+                args.append(frame.symbols.declare_parameter("caller"))
+            macro_ref.accesses_caller = True
+        if "kwargs" in undeclared and "kwargs" not in skip_special_params:
+            args.append(frame.symbols.declare_parameter("kwargs"))
+            macro_ref.accesses_kwargs = True
+        if "varargs" in undeclared and "varargs" not in skip_special_params:
+            args.append(frame.symbols.declare_parameter("varargs"))
+            macro_ref.accesses_varargs = True
+
+        # macros are delayed, they never require output checks
+        frame.require_output_check = False
+        frame.symbols.analyze_node(node)
+        self.writeline("%s(%s):" % (self.func("macro"), ", ".join(args)), node)
+        self.indent()
+
+        self.buffer(frame)
+        self.enter_frame(frame)
+
+        self.push_parameter_definitions(frame)
+        for idx, arg in enumerate(node.args):
+            ref = frame.symbols.ref(arg.name)
+            self.writeline("if %s is missing:" % ref)
+            self.indent()
+            try:
+                default = node.defaults[idx - len(node.args)]
+            except IndexError:
+                self.writeline(
+                    "%s = undefined(%r, name=%r)"
+                    % (ref, "parameter %r was not provided" % arg.name, arg.name)
+                )
+            else:
+                self.writeline("%s = " % ref)
+                self.visit(default, frame)
+            self.mark_parameter_stored(ref)
+            self.outdent()
+        self.pop_parameter_definitions()
+
+        self.blockvisit(node.body, frame)
+        self.return_buffer_contents(frame, force_unescaped=True)
+        self.leave_frame(frame, with_python_scope=True)
+        self.outdent()
+
+        return frame, macro_ref
+
+    def macro_def(self, macro_ref, frame):
+        """Dump the macro definition for the def created by macro_body."""
+        arg_tuple = ", ".join(repr(x.name) for x in macro_ref.node.args)
+        name = getattr(macro_ref.node, "name", None)
+        if len(macro_ref.node.args) == 1:
+            arg_tuple += ","
+        self.write(
+            "Macro(environment, macro, %r, (%s), %r, %r, %r, "
+            "context.eval_ctx.autoescape)"
+            % (
+                name,
+                arg_tuple,
+                macro_ref.accesses_kwargs,
+                macro_ref.accesses_varargs,
+                macro_ref.accesses_caller,
+            )
+        )
+
+    def position(self, node):
+        """Return a human readable position for the node."""
+        rv = "line %d" % node.lineno
+        if self.name is not None:
+            rv += " in " + repr(self.name)
+        return rv
+
+    def dump_local_context(self, frame):
+        return "{%s}" % ", ".join(
+            "%r: %s" % (name, target)
+            for name, target in iteritems(frame.symbols.dump_stores())
+        )
+
+    def write_commons(self):
+        """Writes a common preamble that is used by root and block functions.
+        Primarily this sets up common local helpers and enforces a generator
+        through a dead branch.
+        """
+        self.writeline("resolve = context.resolve_or_missing")
+        self.writeline("undefined = environment.undefined")
+        # always use the standard Undefined class for the implicit else of
+        # conditional expressions
+        self.writeline("cond_expr_undefined = Undefined")
+        self.writeline("if 0: yield None")
+
+    def push_parameter_definitions(self, frame):
+        """Pushes all parameter targets from the given frame into a local
+        stack that permits tracking of yet to be assigned parameters.  In
+        particular this enables the optimization from `visit_Name` to skip
+        undefined expressions for parameters in macros as macros can reference
+        otherwise unbound parameters.
+        """
+        self._param_def_block.append(frame.symbols.dump_param_targets())
+
+    def pop_parameter_definitions(self):
+        """Pops the current parameter definitions set."""
+        self._param_def_block.pop()
+
+    def mark_parameter_stored(self, target):
+        """Marks a parameter in the current parameter definitions as stored.
+        This will skip the enforced undefined checks.
+        """
+        if self._param_def_block:
+            self._param_def_block[-1].discard(target)
+
+    def push_context_reference(self, target):
+        self._context_reference_stack.append(target)
+
+    def pop_context_reference(self):
+        self._context_reference_stack.pop()
+
+    def get_context_ref(self):
+        return self._context_reference_stack[-1]
+
+    def get_resolve_func(self):
+        target = self._context_reference_stack[-1]
+        if target == "context":
+            return "resolve"
+        return "%s.resolve" % target
+
+    def derive_context(self, frame):
+        return "%s.derived(%s)" % (
+            self.get_context_ref(),
+            self.dump_local_context(frame),
+        )
+
+    def parameter_is_undeclared(self, target):
+        """Checks if a given target is an undeclared parameter."""
+        if not self._param_def_block:
+            return False
+        return target in self._param_def_block[-1]
+
+    def push_assign_tracking(self):
+        """Pushes a new layer for assignment tracking."""
+        self._assign_stack.append(set())
+
+    def pop_assign_tracking(self, frame):
+        """Pops the topmost level for assignment tracking and updates the
+        context variables if necessary.
+        """
+        vars = self._assign_stack.pop()
+        if not frame.toplevel or not vars:
+            return
+        public_names = [x for x in vars if x[:1] != "_"]
+        if len(vars) == 1:
+            name = next(iter(vars))
+            ref = frame.symbols.ref(name)
+            self.writeline("context.vars[%r] = %s" % (name, ref))
+        else:
+            self.writeline("context.vars.update({")
+            for idx, name in enumerate(vars):
+                if idx:
+                    self.write(", ")
+                ref = frame.symbols.ref(name)
+                self.write("%r: %s" % (name, ref))
+            self.write("})")
+        if public_names:
+            if len(public_names) == 1:
+                self.writeline("context.exported_vars.add(%r)" % public_names[0])
+            else:
+                self.writeline(
+                    "context.exported_vars.update((%s))"
+                    % ", ".join(imap(repr, public_names))
+                )
+
+    # -- Statement Visitors
+
+    def visit_Template(self, node, frame=None):
+        assert frame is None, "no root frame allowed"
+        eval_ctx = EvalContext(self.environment, self.name)
+
+        from .runtime import exported
+
+        self.writeline("from __future__ import %s" % ", ".join(code_features))
+        self.writeline("from jinja2.runtime import " + ", ".join(exported))
+
+        if self.environment.is_async:
+            self.writeline(
+                "from jinja2.asyncsupport import auto_await, "
+                "auto_aiter, AsyncLoopContext"
+            )
+
+        # if we want a deferred initialization we cannot move the
+        # environment into a local name
+        envenv = not self.defer_init and ", environment=environment" or ""
+
+        # do we have an extends tag at all?  If not, we can save some
+        # overhead by just not processing any inheritance code.
+        have_extends = node.find(nodes.Extends) is not None
+
+        # find all blocks
+        for block in node.find_all(nodes.Block):
+            if block.name in self.blocks:
+                self.fail("block %r defined twice" % block.name, block.lineno)
+            self.blocks[block.name] = block
+
+        # find all imports and import them
+        for import_ in node.find_all(nodes.ImportedName):
+            if import_.importname not in self.import_aliases:
+                imp = import_.importname
+                self.import_aliases[imp] = alias = self.temporary_identifier()
+                if "." in imp:
+                    module, obj = imp.rsplit(".", 1)
+                    self.writeline("from %s import %s as %s" % (module, obj, alias))
+                else:
+                    self.writeline("import %s as %s" % (imp, alias))
+
+        # add the load name
+        self.writeline("name = %r" % self.name)
+
+        # generate the root render function.
+        self.writeline(
+            "%s(context, missing=missing%s):" % (self.func("root"), envenv), extra=1
+        )
+        self.indent()
+        self.write_commons()
+
+        # process the root
+        frame = Frame(eval_ctx)
+        if "self" in find_undeclared(node.body, ("self",)):
+            ref = frame.symbols.declare_parameter("self")
+            self.writeline("%s = TemplateReference(context)" % ref)
+        frame.symbols.analyze_node(node)
+        frame.toplevel = frame.rootlevel = True
+        frame.require_output_check = have_extends and not self.has_known_extends
+        if have_extends:
+            self.writeline("parent_template = None")
+        self.enter_frame(frame)
+        self.pull_dependencies(node.body)
+        self.blockvisit(node.body, frame)
+        self.leave_frame(frame, with_python_scope=True)
+        self.outdent()
+
+        # make sure that the parent root is called.
+        if have_extends:
+            if not self.has_known_extends:
+                self.indent()
+                self.writeline("if parent_template is not None:")
+            self.indent()
+            if supports_yield_from and not self.environment.is_async:
+                self.writeline("yield from parent_template.root_render_func(context)")
+            else:
+                self.writeline(
+                    "%sfor event in parent_template."
+                    "root_render_func(context):"
+                    % (self.environment.is_async and "async " or "")
+                )
+                self.indent()
+                self.writeline("yield event")
+                self.outdent()
+            self.outdent(1 + (not self.has_known_extends))
+
+        # at this point we now have the blocks collected and can visit them too.
+        for name, block in iteritems(self.blocks):
+            self.writeline(
+                "%s(context, missing=missing%s):"
+                % (self.func("block_" + name), envenv),
+                block,
+                1,
+            )
+            self.indent()
+            self.write_commons()
+            # It's important that we do not make this frame a child of the
+            # toplevel template.  This would cause a variety of
+            # interesting issues with identifier tracking.
+            block_frame = Frame(eval_ctx)
+            undeclared = find_undeclared(block.body, ("self", "super"))
+            if "self" in undeclared:
+                ref = block_frame.symbols.declare_parameter("self")
+                self.writeline("%s = TemplateReference(context)" % ref)
+            if "super" in undeclared:
+                ref = block_frame.symbols.declare_parameter("super")
+                self.writeline("%s = context.super(%r, block_%s)" % (ref, name, name))
+            block_frame.symbols.analyze_node(block)
+            block_frame.block = name
+            self.enter_frame(block_frame)
+            self.pull_dependencies(block.body)
+            self.blockvisit(block.body, block_frame)
+            self.leave_frame(block_frame, with_python_scope=True)
+            self.outdent()
+
+        self.writeline(
+            "blocks = {%s}" % ", ".join("%r: block_%s" % (x, x) for x in self.blocks),
+            extra=1,
+        )
+
+        # add a function that returns the debug info
+        self.writeline(
+            "debug_info = %r" % "&".join("%s=%s" % x for x in self.debug_info)
+        )
+
+    def visit_Block(self, node, frame):
+        """Call a block and register it for the template."""
+        level = 0
+        if frame.toplevel:
+            # if we know that we are a child template, there is no need to
+            # check if we are one
+            if self.has_known_extends:
+                return
+            if self.extends_so_far > 0:
+                self.writeline("if parent_template is None:")
+                self.indent()
+                level += 1
+
+        if node.scoped:
+            context = self.derive_context(frame)
+        else:
+            context = self.get_context_ref()
+
+        if (
+            supports_yield_from
+            and not self.environment.is_async
+            and frame.buffer is None
+        ):
+            self.writeline(
+                "yield from context.blocks[%r][0](%s)" % (node.name, context), node
+            )
+        else:
+            loop = self.environment.is_async and "async for" or "for"
+            self.writeline(
+                "%s event in context.blocks[%r][0](%s):" % (loop, node.name, context),
+                node,
+            )
+            self.indent()
+            self.simple_write("event", frame)
+            self.outdent()
+
+        self.outdent(level)
+
+    def visit_Extends(self, node, frame):
+        """Calls the extender."""
+        if not frame.toplevel:
+            self.fail("cannot use extend from a non top-level scope", node.lineno)
+
+        # if the number of extends statements in general is zero so
+        # far, we don't have to add a check if something extended
+        # the template before this one.
+        if self.extends_so_far > 0:
+
+            # if we have a known extends we just add a template runtime
+            # error into the generated code.  We could catch that at compile
+            # time too, but i welcome it not to confuse users by throwing the
+            # same error at different times just "because we can".
+            if not self.has_known_extends:
+                self.writeline("if parent_template is not None:")
+                self.indent()
+            self.writeline("raise TemplateRuntimeError(%r)" % "extended multiple times")
+
+            # if we have a known extends already we don't need that code here
+            # as we know that the template execution will end here.
+            if self.has_known_extends:
+                raise CompilerExit()
+            else:
+                self.outdent()
+
+        self.writeline("parent_template = environment.get_template(", node)
+        self.visit(node.template, frame)
+        self.write(", %r)" % self.name)
+        self.writeline(
+            "for name, parent_block in parent_template.blocks.%s():" % dict_item_iter
+        )
+        self.indent()
+        self.writeline("context.blocks.setdefault(name, []).append(parent_block)")
+        self.outdent()
+
+        # if this extends statement was in the root level we can take
+        # advantage of that information and simplify the generated code
+        # in the top level from this point onwards
+        if frame.rootlevel:
+            self.has_known_extends = True
+
+        # and now we have one more
+        self.extends_so_far += 1
+
+    def visit_Include(self, node, frame):
+        """Handles includes."""
+        if node.ignore_missing:
+            self.writeline("try:")
+            self.indent()
+
+        func_name = "get_or_select_template"
+        if isinstance(node.template, nodes.Const):
+            if isinstance(node.template.value, string_types):
+                func_name = "get_template"
+            elif isinstance(node.template.value, (tuple, list)):
+                func_name = "select_template"
+        elif isinstance(node.template, (nodes.Tuple, nodes.List)):
+            func_name = "select_template"
+
+        self.writeline("template = environment.%s(" % func_name, node)
+        self.visit(node.template, frame)
+        self.write(", %r)" % self.name)
+        if node.ignore_missing:
+            self.outdent()
+            self.writeline("except TemplateNotFound:")
+            self.indent()
+            self.writeline("pass")
+            self.outdent()
+            self.writeline("else:")
+            self.indent()
+
+        skip_event_yield = False
+        if node.with_context:
+            loop = self.environment.is_async and "async for" or "for"
+            self.writeline(
+                "%s event in template.root_render_func("
+                "template.new_context(context.get_all(), True, "
+                "%s)):" % (loop, self.dump_local_context(frame))
+            )
+        elif self.environment.is_async:
+            self.writeline(
+                "for event in (await "
+                "template._get_default_module_async())"
+                "._body_stream:"
+            )
+        else:
+            if supports_yield_from:
+                self.writeline("yield from template._get_default_module()._body_stream")
+                skip_event_yield = True
+            else:
+                self.writeline(
+                    "for event in template._get_default_module()._body_stream:"
+                )
+
+        if not skip_event_yield:
+            self.indent()
+            self.simple_write("event", frame)
+            self.outdent()
+
+        if node.ignore_missing:
+            self.outdent()
+
+    def visit_Import(self, node, frame):
+        """Visit regular imports."""
+        self.writeline("%s = " % frame.symbols.ref(node.target), node)
+        if frame.toplevel:
+            self.write("context.vars[%r] = " % node.target)
+        if self.environment.is_async:
+            self.write("await ")
+        self.write("environment.get_template(")
+        self.visit(node.template, frame)
+        self.write(", %r)." % self.name)
+        if node.with_context:
+            self.write(
+                "make_module%s(context.get_all(), True, %s)"
+                % (
+                    self.environment.is_async and "_async" or "",
+                    self.dump_local_context(frame),
+                )
+            )
+        elif self.environment.is_async:
+            self.write("_get_default_module_async()")
+        else:
+            self.write("_get_default_module()")
+        if frame.toplevel and not node.target.startswith("_"):
+            self.writeline("context.exported_vars.discard(%r)" % node.target)
+
+    def visit_FromImport(self, node, frame):
+        """Visit named imports."""
+        self.newline(node)
+        self.write(
+            "included_template = %senvironment.get_template("
+            % (self.environment.is_async and "await " or "")
+        )
+        self.visit(node.template, frame)
+        self.write(", %r)." % self.name)
+        if node.with_context:
+            self.write(
+                "make_module%s(context.get_all(), True, %s)"
+                % (
+                    self.environment.is_async and "_async" or "",
+                    self.dump_local_context(frame),
+                )
+            )
+        elif self.environment.is_async:
+            self.write("_get_default_module_async()")
+        else:
+            self.write("_get_default_module()")
+
+        var_names = []
+        discarded_names = []
+        for name in node.names:
+            if isinstance(name, tuple):
+                name, alias = name
+            else:
+                alias = name
+            self.writeline(
+                "%s = getattr(included_template, "
+                "%r, missing)" % (frame.symbols.ref(alias), name)
+            )
+            self.writeline("if %s is missing:" % frame.symbols.ref(alias))
+            self.indent()
+            self.writeline(
+                "%s = undefined(%r %% "
+                "included_template.__name__, "
+                "name=%r)"
+                % (
+                    frame.symbols.ref(alias),
+                    "the template %%r (imported on %s) does "
+                    "not export the requested name %s"
+                    % (self.position(node), repr(name)),
+                    name,
+                )
+            )
+            self.outdent()
+            if frame.toplevel:
+                var_names.append(alias)
+                if not alias.startswith("_"):
+                    discarded_names.append(alias)
+
+        if var_names:
+            if len(var_names) == 1:
+                name = var_names[0]
+                self.writeline(
+                    "context.vars[%r] = %s" % (name, frame.symbols.ref(name))
+                )
+            else:
+                self.writeline(
+                    "context.vars.update({%s})"
+                    % ", ".join(
+                        "%r: %s" % (name, frame.symbols.ref(name)) for name in var_names
+                    )
+                )
+        if discarded_names:
+            if len(discarded_names) == 1:
+                self.writeline("context.exported_vars.discard(%r)" % discarded_names[0])
+            else:
+                self.writeline(
+                    "context.exported_vars.difference_"
+                    "update((%s))" % ", ".join(imap(repr, discarded_names))
+                )
+
+    def visit_For(self, node, frame):
+        loop_frame = frame.inner()
+        test_frame = frame.inner()
+        else_frame = frame.inner()
+
+        # try to figure out if we have an extended loop.  An extended loop
+        # is necessary if the loop is in recursive mode if the special loop
+        # variable is accessed in the body.
+        extended_loop = node.recursive or "loop" in find_undeclared(
+            node.iter_child_nodes(only=("body",)), ("loop",)
+        )
+
+        loop_ref = None
+        if extended_loop:
+            loop_ref = loop_frame.symbols.declare_parameter("loop")
+
+        loop_frame.symbols.analyze_node(node, for_branch="body")
+        if node.else_:
+            else_frame.symbols.analyze_node(node, for_branch="else")
+
+        if node.test:
+            loop_filter_func = self.temporary_identifier()
+            test_frame.symbols.analyze_node(node, for_branch="test")
+            self.writeline("%s(fiter):" % self.func(loop_filter_func), node.test)
+            self.indent()
+            self.enter_frame(test_frame)
+            self.writeline(self.environment.is_async and "async for " or "for ")
+            self.visit(node.target, loop_frame)
+            self.write(" in ")
+            self.write(self.environment.is_async and "auto_aiter(fiter)" or "fiter")
+            self.write(":")
+            self.indent()
+            self.writeline("if ", node.test)
+            self.visit(node.test, test_frame)
+            self.write(":")
+            self.indent()
+            self.writeline("yield ")
+            self.visit(node.target, loop_frame)
+            self.outdent(3)
+            self.leave_frame(test_frame, with_python_scope=True)
+
+        # if we don't have an recursive loop we have to find the shadowed
+        # variables at that point.  Because loops can be nested but the loop
+        # variable is a special one we have to enforce aliasing for it.
+        if node.recursive:
+            self.writeline(
+                "%s(reciter, loop_render_func, depth=0):" % self.func("loop"), node
+            )
+            self.indent()
+            self.buffer(loop_frame)
+
+            # Use the same buffer for the else frame
+            else_frame.buffer = loop_frame.buffer
+
+        # make sure the loop variable is a special one and raise a template
+        # assertion error if a loop tries to write to loop
+        if extended_loop:
+            self.writeline("%s = missing" % loop_ref)
+
+        for name in node.find_all(nodes.Name):
+            if name.ctx == "store" and name.name == "loop":
+                self.fail(
+                    "Can't assign to special loop variable in for-loop target",
+                    name.lineno,
+                )
+
+        if node.else_:
+            iteration_indicator = self.temporary_identifier()
+            self.writeline("%s = 1" % iteration_indicator)
+
+        self.writeline(self.environment.is_async and "async for " or "for ", node)
+        self.visit(node.target, loop_frame)
+        if extended_loop:
+            if self.environment.is_async:
+                self.write(", %s in AsyncLoopContext(" % loop_ref)
+            else:
+                self.write(", %s in LoopContext(" % loop_ref)
+        else:
+            self.write(" in ")
+
+        if node.test:
+            self.write("%s(" % loop_filter_func)
+        if node.recursive:
+            self.write("reciter")
+        else:
+            if self.environment.is_async and not extended_loop:
+                self.write("auto_aiter(")
+            self.visit(node.iter, frame)
+            if self.environment.is_async and not extended_loop:
+                self.write(")")
+        if node.test:
+            self.write(")")
+
+        if node.recursive:
+            self.write(", undefined, loop_render_func, depth):")
+        else:
+            self.write(extended_loop and ", undefined):" or ":")
+
+        self.indent()
+        self.enter_frame(loop_frame)
+
+        self.blockvisit(node.body, loop_frame)
+        if node.else_:
+            self.writeline("%s = 0" % iteration_indicator)
+        self.outdent()
+        self.leave_frame(
+            loop_frame, with_python_scope=node.recursive and not node.else_
+        )
+
+        if node.else_:
+            self.writeline("if %s:" % iteration_indicator)
+            self.indent()
+            self.enter_frame(else_frame)
+            self.blockvisit(node.else_, else_frame)
+            self.leave_frame(else_frame)
+            self.outdent()
+
+        # if the node was recursive we have to return the buffer contents
+        # and start the iteration code
+        if node.recursive:
+            self.return_buffer_contents(loop_frame)
+            self.outdent()
+            self.start_write(frame, node)
+            if self.environment.is_async:
+                self.write("await ")
+            self.write("loop(")
+            if self.environment.is_async:
+                self.write("auto_aiter(")
+            self.visit(node.iter, frame)
+            if self.environment.is_async:
+                self.write(")")
+            self.write(", loop)")
+            self.end_write(frame)
+
+    def visit_If(self, node, frame):
+        if_frame = frame.soft()
+        self.writeline("if ", node)
+        self.visit(node.test, if_frame)
+        self.write(":")
+        self.indent()
+        self.blockvisit(node.body, if_frame)
+        self.outdent()
+        for elif_ in node.elif_:
+            self.writeline("elif ", elif_)
+            self.visit(elif_.test, if_frame)
+            self.write(":")
+            self.indent()
+            self.blockvisit(elif_.body, if_frame)
+            self.outdent()
+        if node.else_:
+            self.writeline("else:")
+            self.indent()
+            self.blockvisit(node.else_, if_frame)
+            self.outdent()
+
+    def visit_Macro(self, node, frame):
+        macro_frame, macro_ref = self.macro_body(node, frame)
+        self.newline()
+        if frame.toplevel:
+            if not node.name.startswith("_"):
+                self.write("context.exported_vars.add(%r)" % node.name)
+            self.writeline("context.vars[%r] = " % node.name)
+        self.write("%s = " % frame.symbols.ref(node.name))
+        self.macro_def(macro_ref, macro_frame)
+
+    def visit_CallBlock(self, node, frame):
+        call_frame, macro_ref = self.macro_body(node, frame)
+        self.writeline("caller = ")
+        self.macro_def(macro_ref, call_frame)
+        self.start_write(frame, node)
+        self.visit_Call(node.call, frame, forward_caller=True)
+        self.end_write(frame)
+
+    def visit_FilterBlock(self, node, frame):
+        filter_frame = frame.inner()
+        filter_frame.symbols.analyze_node(node)
+        self.enter_frame(filter_frame)
+        self.buffer(filter_frame)
+        self.blockvisit(node.body, filter_frame)
+        self.start_write(frame, node)
+        self.visit_Filter(node.filter, filter_frame)
+        self.end_write(frame)
+        self.leave_frame(filter_frame)
+
+    def visit_With(self, node, frame):
+        with_frame = frame.inner()
+        with_frame.symbols.analyze_node(node)
+        self.enter_frame(with_frame)
+        for target, expr in izip(node.targets, node.values):
+            self.newline()
+            self.visit(target, with_frame)
+            self.write(" = ")
+            self.visit(expr, frame)
+        self.blockvisit(node.body, with_frame)
+        self.leave_frame(with_frame)
+
+    def visit_ExprStmt(self, node, frame):
+        self.newline(node)
+        self.visit(node.node, frame)
+
+    _FinalizeInfo = namedtuple("_FinalizeInfo", ("const", "src"))
+    #: The default finalize function if the environment isn't configured
+    #: with one. Or if the environment has one, this is called on that
+    #: function's output for constants.
+    _default_finalize = text_type
+    _finalize = None
+
+    def _make_finalize(self):
+        """Build the finalize function to be used on constants and at
+        runtime. Cached so it's only created once for all output nodes.
+
+        Returns a ``namedtuple`` with the following attributes:
+
+        ``const``
+            A function to finalize constant data at compile time.
+
+        ``src``
+            Source code to output around nodes to be evaluated at
+            runtime.
+        """
+        if self._finalize is not None:
+            return self._finalize
+
+        finalize = default = self._default_finalize
+        src = None
+
+        if self.environment.finalize:
+            src = "environment.finalize("
+            env_finalize = self.environment.finalize
+
+            def finalize(value):
+                return default(env_finalize(value))
+
+            if getattr(env_finalize, "contextfunction", False) is True:
+                src += "context, "
+                finalize = None  # noqa: F811
+            elif getattr(env_finalize, "evalcontextfunction", False) is True:
+                src += "context.eval_ctx, "
+                finalize = None
+            elif getattr(env_finalize, "environmentfunction", False) is True:
+                src += "environment, "
+
+                def finalize(value):
+                    return default(env_finalize(self.environment, value))
+
+        self._finalize = self._FinalizeInfo(finalize, src)
+        return self._finalize
+
+    def _output_const_repr(self, group):
+        """Given a group of constant values converted from ``Output``
+        child nodes, produce a string to write to the template module
+        source.
+        """
+        return repr(concat(group))
+
+    def _output_child_to_const(self, node, frame, finalize):
+        """Try to optimize a child of an ``Output`` node by trying to
+        convert it to constant, finalized data at compile time.
+
+        If :exc:`Impossible` is raised, the node is not constant and
+        will be evaluated at runtime. Any other exception will also be
+        evaluated at runtime for easier debugging.
+        """
+        const = node.as_const(frame.eval_ctx)
+
+        if frame.eval_ctx.autoescape:
+            const = escape(const)
+
+        # Template data doesn't go through finalize.
+        if isinstance(node, nodes.TemplateData):
+            return text_type(const)
+
+        return finalize.const(const)
+
+    def _output_child_pre(self, node, frame, finalize):
+        """Output extra source code before visiting a child of an
+        ``Output`` node.
+        """
+        if frame.eval_ctx.volatile:
+            self.write("(escape if context.eval_ctx.autoescape else to_string)(")
+        elif frame.eval_ctx.autoescape:
+            self.write("escape(")
+        else:
+            self.write("to_string(")
+
+        if finalize.src is not None:
+            self.write(finalize.src)
+
+    def _output_child_post(self, node, frame, finalize):
+        """Output extra source code after visiting a child of an
+        ``Output`` node.
+        """
+        self.write(")")
+
+        if finalize.src is not None:
+            self.write(")")
+
+    def visit_Output(self, node, frame):
+        # If an extends is active, don't render outside a block.
+        if frame.require_output_check:
+            # A top-level extends is known to exist at compile time.
+            if self.has_known_extends:
+                return
+
+            self.writeline("if parent_template is None:")
+            self.indent()
+
+        finalize = self._make_finalize()
+        body = []
+
+        # Evaluate constants at compile time if possible. Each item in
+        # body will be either a list of static data or a node to be
+        # evaluated at runtime.
+        for child in node.nodes:
+            try:
+                if not (
+                    # If the finalize function requires runtime context,
+                    # constants can't be evaluated at compile time.
+                    finalize.const
+                    # Unless it's basic template data that won't be
+                    # finalized anyway.
+                    or isinstance(child, nodes.TemplateData)
+                ):
+                    raise nodes.Impossible()
+
+                const = self._output_child_to_const(child, frame, finalize)
+            except (nodes.Impossible, Exception):
+                # The node was not constant and needs to be evaluated at
+                # runtime. Or another error was raised, which is easier
+                # to debug at runtime.
+                body.append(child)
+                continue
+
+            if body and isinstance(body[-1], list):
+                body[-1].append(const)
+            else:
+                body.append([const])
+
+        if frame.buffer is not None:
+            if len(body) == 1:
+                self.writeline("%s.append(" % frame.buffer)
+            else:
+                self.writeline("%s.extend((" % frame.buffer)
+
+            self.indent()
+
+        for item in body:
+            if isinstance(item, list):
+                # A group of constant data to join and output.
+                val = self._output_const_repr(item)
+
+                if frame.buffer is None:
+                    self.writeline("yield " + val)
+                else:
+                    self.writeline(val + ",")
+            else:
+                if frame.buffer is None:
+                    self.writeline("yield ", item)
+                else:
+                    self.newline(item)
+
+                # A node to be evaluated at runtime.
+                self._output_child_pre(item, frame, finalize)
+                self.visit(item, frame)
+                self._output_child_post(item, frame, finalize)
+
+                if frame.buffer is not None:
+                    self.write(",")
+
+        if frame.buffer is not None:
+            self.outdent()
+            self.writeline(")" if len(body) == 1 else "))")
+
+        if frame.require_output_check:
+            self.outdent()
+
+    def visit_Assign(self, node, frame):
+        self.push_assign_tracking()
+        self.newline(node)
+        self.visit(node.target, frame)
+        self.write(" = ")
+        self.visit(node.node, frame)
+        self.pop_assign_tracking(frame)
+
+    def visit_AssignBlock(self, node, frame):
+        self.push_assign_tracking()
+        block_frame = frame.inner()
+        # This is a special case.  Since a set block always captures we
+        # will disable output checks.  This way one can use set blocks
+        # toplevel even in extended templates.
+        block_frame.require_output_check = False
+        block_frame.symbols.analyze_node(node)
+        self.enter_frame(block_frame)
+        self.buffer(block_frame)
+        self.blockvisit(node.body, block_frame)
+        self.newline(node)
+        self.visit(node.target, frame)
+        self.write(" = (Markup if context.eval_ctx.autoescape else identity)(")
+        if node.filter is not None:
+            self.visit_Filter(node.filter, block_frame)
+        else:
+            self.write("concat(%s)" % block_frame.buffer)
+        self.write(")")
+        self.pop_assign_tracking(frame)
+        self.leave_frame(block_frame)
+
+    # -- Expression Visitors
+
+    def visit_Name(self, node, frame):
+        if node.ctx == "store" and frame.toplevel:
+            if self._assign_stack:
+                self._assign_stack[-1].add(node.name)
+        ref = frame.symbols.ref(node.name)
+
+        # If we are looking up a variable we might have to deal with the
+        # case where it's undefined.  We can skip that case if the load
+        # instruction indicates a parameter which are always defined.
+        if node.ctx == "load":
+            load = frame.symbols.find_load(ref)
+            if not (
+                load is not None
+                and load[0] == VAR_LOAD_PARAMETER
+                and not self.parameter_is_undeclared(ref)
+            ):
+                self.write(
+                    "(undefined(name=%r) if %s is missing else %s)"
+                    % (node.name, ref, ref)
+                )
+                return
+
+        self.write(ref)
+
+    def visit_NSRef(self, node, frame):
+        # NSRefs can only be used to store values; since they use the normal
+        # `foo.bar` notation they will be parsed as a normal attribute access
+        # when used anywhere but in a `set` context
+        ref = frame.symbols.ref(node.name)
+        self.writeline("if not isinstance(%s, Namespace):" % ref)
+        self.indent()
+        self.writeline(
+            "raise TemplateRuntimeError(%r)"
+            % "cannot assign attribute on non-namespace object"
+        )
+        self.outdent()
+        self.writeline("%s[%r]" % (ref, node.attr))
+
+    def visit_Const(self, node, frame):
+        val = node.as_const(frame.eval_ctx)
+        if isinstance(val, float):
+            self.write(str(val))
+        else:
+            self.write(repr(val))
+
+    def visit_TemplateData(self, node, frame):
+        try:
+            self.write(repr(node.as_const(frame.eval_ctx)))
+        except nodes.Impossible:
+            self.write(
+                "(Markup if context.eval_ctx.autoescape else identity)(%r)" % node.data
+            )
+
+    def visit_Tuple(self, node, frame):
+        self.write("(")
+        idx = -1
+        for idx, item in enumerate(node.items):
+            if idx:
+                self.write(", ")
+            self.visit(item, frame)
+        self.write(idx == 0 and ",)" or ")")
+
+    def visit_List(self, node, frame):
+        self.write("[")
+        for idx, item in enumerate(node.items):
+            if idx:
+                self.write(", ")
+            self.visit(item, frame)
+        self.write("]")
+
+    def visit_Dict(self, node, frame):
+        self.write("{")
+        for idx, item in enumerate(node.items):
+            if idx:
+                self.write(", ")
+            self.visit(item.key, frame)
+            self.write(": ")
+            self.visit(item.value, frame)
+        self.write("}")
+
+    def binop(operator, interceptable=True):  # noqa: B902
+        @optimizeconst
+        def visitor(self, node, frame):
+            if (
+                self.environment.sandboxed
+                and operator in self.environment.intercepted_binops
+            ):
+                self.write("environment.call_binop(context, %r, " % operator)
+                self.visit(node.left, frame)
+                self.write(", ")
+                self.visit(node.right, frame)
+            else:
+                self.write("(")
+                self.visit(node.left, frame)
+                self.write(" %s " % operator)
+                self.visit(node.right, frame)
+            self.write(")")
+
+        return visitor
+
+    def uaop(operator, interceptable=True):  # noqa: B902
+        @optimizeconst
+        def visitor(self, node, frame):
+            if (
+                self.environment.sandboxed
+                and operator in self.environment.intercepted_unops
+            ):
+                self.write("environment.call_unop(context, %r, " % operator)
+                self.visit(node.node, frame)
+            else:
+                self.write("(" + operator)
+                self.visit(node.node, frame)
+            self.write(")")
+
+        return visitor
+
+    visit_Add = binop("+")
+    visit_Sub = binop("-")
+    visit_Mul = binop("*")
+    visit_Div = binop("/")
+    visit_FloorDiv = binop("//")
+    visit_Pow = binop("**")
+    visit_Mod = binop("%")
+    visit_And = binop("and", interceptable=False)
+    visit_Or = binop("or", interceptable=False)
+    visit_Pos = uaop("+")
+    visit_Neg = uaop("-")
+    visit_Not = uaop("not ", interceptable=False)
+    del binop, uaop
+
+    @optimizeconst
+    def visit_Concat(self, node, frame):
+        if frame.eval_ctx.volatile:
+            func_name = "(context.eval_ctx.volatile and markup_join or unicode_join)"
+        elif frame.eval_ctx.autoescape:
+            func_name = "markup_join"
+        else:
+            func_name = "unicode_join"
+        self.write("%s((" % func_name)
+        for arg in node.nodes:
+            self.visit(arg, frame)
+            self.write(", ")
+        self.write("))")
+
+    @optimizeconst
+    def visit_Compare(self, node, frame):
+        self.write("(")
+        self.visit(node.expr, frame)
+        for op in node.ops:
+            self.visit(op, frame)
+        self.write(")")
+
+    def visit_Operand(self, node, frame):
+        self.write(" %s " % operators[node.op])
+        self.visit(node.expr, frame)
+
+    @optimizeconst
+    def visit_Getattr(self, node, frame):
+        if self.environment.is_async:
+            self.write("(await auto_await(")
+
+        self.write("environment.getattr(")
+        self.visit(node.node, frame)
+        self.write(", %r)" % node.attr)
+
+        if self.environment.is_async:
+            self.write("))")
+
+    @optimizeconst
+    def visit_Getitem(self, node, frame):
+        # slices bypass the environment getitem method.
+        if isinstance(node.arg, nodes.Slice):
+            self.visit(node.node, frame)
+            self.write("[")
+            self.visit(node.arg, frame)
+            self.write("]")
+        else:
+            if self.environment.is_async:
+                self.write("(await auto_await(")
+
+            self.write("environment.getitem(")
+            self.visit(node.node, frame)
+            self.write(", ")
+            self.visit(node.arg, frame)
+            self.write(")")
+
+            if self.environment.is_async:
+                self.write("))")
+
+    def visit_Slice(self, node, frame):
+        if node.start is not None:
+            self.visit(node.start, frame)
+        self.write(":")
+        if node.stop is not None:
+            self.visit(node.stop, frame)
+        if node.step is not None:
+            self.write(":")
+            self.visit(node.step, frame)
+
+    @optimizeconst
+    def visit_Filter(self, node, frame):
+        if self.environment.is_async:
+            self.write("await auto_await(")
+        self.write(self.filters[node.name] + "(")
+        func = self.environment.filters.get(node.name)
+        if func is None:
+            self.fail("no filter named %r" % node.name, node.lineno)
+        if getattr(func, "contextfilter", False) is True:
+            self.write("context, ")
+        elif getattr(func, "evalcontextfilter", False) is True:
+            self.write("context.eval_ctx, ")
+        elif getattr(func, "environmentfilter", False) is True:
+            self.write("environment, ")
+
+        # if the filter node is None we are inside a filter block
+        # and want to write to the current buffer
+        if node.node is not None:
+            self.visit(node.node, frame)
+        elif frame.eval_ctx.volatile:
+            self.write(
+                "(context.eval_ctx.autoescape and"
+                " Markup(concat(%s)) or concat(%s))" % (frame.buffer, frame.buffer)
+            )
+        elif frame.eval_ctx.autoescape:
+            self.write("Markup(concat(%s))" % frame.buffer)
+        else:
+            self.write("concat(%s)" % frame.buffer)
+        self.signature(node, frame)
+        self.write(")")
+        if self.environment.is_async:
+            self.write(")")
+
+    @optimizeconst
+    def visit_Test(self, node, frame):
+        self.write(self.tests[node.name] + "(")
+        if node.name not in self.environment.tests:
+            self.fail("no test named %r" % node.name, node.lineno)
+        self.visit(node.node, frame)
+        self.signature(node, frame)
+        self.write(")")
+
+    @optimizeconst
+    def visit_CondExpr(self, node, frame):
+        def write_expr2():
+            if node.expr2 is not None:
+                return self.visit(node.expr2, frame)
+            self.write(
+                "cond_expr_undefined(%r)"
+                % (
+                    "the inline if-"
+                    "expression on %s evaluated to false and "
+                    "no else section was defined." % self.position(node)
+                )
+            )
+
+        self.write("(")
+        self.visit(node.expr1, frame)
+        self.write(" if ")
+        self.visit(node.test, frame)
+        self.write(" else ")
+        write_expr2()
+        self.write(")")
+
+    @optimizeconst
+    def visit_Call(self, node, frame, forward_caller=False):
+        if self.environment.is_async:
+            self.write("await auto_await(")
+        if self.environment.sandboxed:
+            self.write("environment.call(context, ")
+        else:
+            self.write("context.call(")
+        self.visit(node.node, frame)
+        extra_kwargs = forward_caller and {"caller": "caller"} or None
+        self.signature(node, frame, extra_kwargs)
+        self.write(")")
+        if self.environment.is_async:
+            self.write(")")
+
+    def visit_Keyword(self, node, frame):
+        self.write(node.key + "=")
+        self.visit(node.value, frame)
+
+    # -- Unused nodes for extensions
+
+    def visit_MarkSafe(self, node, frame):
+        self.write("Markup(")
+        self.visit(node.expr, frame)
+        self.write(")")
+
+    def visit_MarkSafeIfAutoescape(self, node, frame):
+        self.write("(context.eval_ctx.autoescape and Markup or identity)(")
+        self.visit(node.expr, frame)
+        self.write(")")
+
+    def visit_EnvironmentAttribute(self, node, frame):
+        self.write("environment." + node.name)
+
+    def visit_ExtensionAttribute(self, node, frame):
+        self.write("environment.extensions[%r].%s" % (node.identifier, node.name))
+
+    def visit_ImportedName(self, node, frame):
+        self.write(self.import_aliases[node.importname])
+
+    def visit_InternalName(self, node, frame):
+        self.write(node.name)
+
+    def visit_ContextReference(self, node, frame):
+        self.write("context")
+
+    def visit_DerivedContextReference(self, node, frame):
+        self.write(self.derive_context(frame))
+
+    def visit_Continue(self, node, frame):
+        self.writeline("continue", node)
+
+    def visit_Break(self, node, frame):
+        self.writeline("break", node)
+
+    def visit_Scope(self, node, frame):
+        scope_frame = frame.inner()
+        scope_frame.symbols.analyze_node(node)
+        self.enter_frame(scope_frame)
+        self.blockvisit(node.body, scope_frame)
+        self.leave_frame(scope_frame)
+
+    def visit_OverlayScope(self, node, frame):
+        ctx = self.temporary_identifier()
+        self.writeline("%s = %s" % (ctx, self.derive_context(frame)))
+        self.writeline("%s.vars = " % ctx)
+        self.visit(node.context, frame)
+        self.push_context_reference(ctx)
+
+        scope_frame = frame.inner(isolated=True)
+        scope_frame.symbols.analyze_node(node)
+        self.enter_frame(scope_frame)
+        self.blockvisit(node.body, scope_frame)
+        self.leave_frame(scope_frame)
+        self.pop_context_reference()
+
+    def visit_EvalContextModifier(self, node, frame):
+        for keyword in node.options:
+            self.writeline("context.eval_ctx.%s = " % keyword.key)
+            self.visit(keyword.value, frame)
+            try:
+                val = keyword.value.as_const(frame.eval_ctx)
+            except nodes.Impossible:
+                frame.eval_ctx.volatile = True
+            else:
+                setattr(frame.eval_ctx, keyword.key, val)
+
+    def visit_ScopedEvalContextModifier(self, node, frame):
+        old_ctx_name = self.temporary_identifier()
+        saved_ctx = frame.eval_ctx.save()
+        self.writeline("%s = context.eval_ctx.save()" % old_ctx_name)
+        self.visit_EvalContextModifier(node, frame)
+        for child in node.body:
+            self.visit(child, frame)
+        frame.eval_ctx.revert(saved_ctx)
+        self.writeline("context.eval_ctx.revert(%s)" % old_ctx_name)
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/constants.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/constants.py
new file mode 100644
index 0000000..bf7f2ca
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/constants.py
@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+#: list of lorem ipsum words used by the lipsum() helper function
+LOREM_IPSUM_WORDS = u"""\
+a ac accumsan ad adipiscing aenean aliquam aliquet amet ante aptent arcu at
+auctor augue bibendum blandit class commodo condimentum congue consectetuer
+consequat conubia convallis cras cubilia cum curabitur curae cursus dapibus
+diam dictum dictumst dignissim dis dolor donec dui duis egestas eget eleifend
+elementum elit enim erat eros est et etiam eu euismod facilisi facilisis fames
+faucibus felis fermentum feugiat fringilla fusce gravida habitant habitasse hac
+hendrerit hymenaeos iaculis id imperdiet in inceptos integer interdum ipsum
+justo lacinia lacus laoreet lectus leo libero ligula litora lobortis lorem
+luctus maecenas magna magnis malesuada massa mattis mauris metus mi molestie
+mollis montes morbi mus nam nascetur natoque nec neque netus nibh nisi nisl non
+nonummy nostra nulla nullam nunc odio orci ornare parturient pede pellentesque
+penatibus per pharetra phasellus placerat platea porta porttitor posuere
+potenti praesent pretium primis proin pulvinar purus quam quis quisque rhoncus
+ridiculus risus rutrum sagittis sapien scelerisque sed sem semper senectus sit
+sociis sociosqu sodales sollicitudin suscipit suspendisse taciti tellus tempor
+tempus tincidunt torquent tortor tristique turpis ullamcorper ultrices
+ultricies urna ut varius vehicula vel velit venenatis vestibulum vitae vivamus
+viverra volutpat vulputate"""
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/debug.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/debug.py
new file mode 100644
index 0000000..5d8aec3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/debug.py
@@ -0,0 +1,268 @@
+import sys
+from types import CodeType
+
+from . import TemplateSyntaxError
+from ._compat import PYPY
+from .utils import internal_code
+from .utils import missing
+
+
+def rewrite_traceback_stack(source=None):
+    """Rewrite the current exception to replace any tracebacks from
+    within compiled template code with tracebacks that look like they
+    came from the template source.
+
+    This must be called within an ``except`` block.
+
+    :param exc_info: A :meth:`sys.exc_info` tuple. If not provided,
+        the current ``exc_info`` is used.
+    :param source: For ``TemplateSyntaxError``, the original source if
+        known.
+    :return: A :meth:`sys.exc_info` tuple that can be re-raised.
+    """
+    exc_type, exc_value, tb = sys.exc_info()
+
+    if isinstance(exc_value, TemplateSyntaxError) and not exc_value.translated:
+        exc_value.translated = True
+        exc_value.source = source
+
+        try:
+            # Remove the old traceback on Python 3, otherwise the frames
+            # from the compiler still show up.
+            exc_value.with_traceback(None)
+        except AttributeError:
+            pass
+
+        # Outside of runtime, so the frame isn't executing template
+        # code, but it still needs to point at the template.
+        tb = fake_traceback(
+            exc_value, None, exc_value.filename or "<unknown>", exc_value.lineno
+        )
+    else:
+        # Skip the frame for the render function.
+        tb = tb.tb_next
+
+    stack = []
+
+    # Build the stack of traceback object, replacing any in template
+    # code with the source file and line information.
+    while tb is not None:
+        # Skip frames decorated with @internalcode. These are internal
+        # calls that aren't useful in template debugging output.
+        if tb.tb_frame.f_code in internal_code:
+            tb = tb.tb_next
+            continue
+
+        template = tb.tb_frame.f_globals.get("__jinja_template__")
+
+        if template is not None:
+            lineno = template.get_corresponding_lineno(tb.tb_lineno)
+            fake_tb = fake_traceback(exc_value, tb, template.filename, lineno)
+            stack.append(fake_tb)
+        else:
+            stack.append(tb)
+
+        tb = tb.tb_next
+
+    tb_next = None
+
+    # Assign tb_next in reverse to avoid circular references.
+    for tb in reversed(stack):
+        tb_next = tb_set_next(tb, tb_next)
+
+    return exc_type, exc_value, tb_next
+
+
+def fake_traceback(exc_value, tb, filename, lineno):
+    """Produce a new traceback object that looks like it came from the
+    template source instead of the compiled code. The filename, line
+    number, and location name will point to the template, and the local
+    variables will be the current template context.
+
+    :param exc_value: The original exception to be re-raised to create
+        the new traceback.
+    :param tb: The original traceback to get the local variables and
+        code info from.
+    :param filename: The template filename.
+    :param lineno: The line number in the template source.
+    """
+    if tb is not None:
+        # Replace the real locals with the context that would be
+        # available at that point in the template.
+        locals = get_template_locals(tb.tb_frame.f_locals)
+        locals.pop("__jinja_exception__", None)
+    else:
+        locals = {}
+
+    globals = {
+        "__name__": filename,
+        "__file__": filename,
+        "__jinja_exception__": exc_value,
+    }
+    # Raise an exception at the correct line number.
+    code = compile("\n" * (lineno - 1) + "raise __jinja_exception__", filename, "exec")
+
+    # Build a new code object that points to the template file and
+    # replaces the location with a block name.
+    try:
+        location = "template"
+
+        if tb is not None:
+            function = tb.tb_frame.f_code.co_name
+
+            if function == "root":
+                location = "top-level template code"
+            elif function.startswith("block_"):
+                location = 'block "%s"' % function[6:]
+
+        # Collect arguments for the new code object. CodeType only
+        # accepts positional arguments, and arguments were inserted in
+        # new Python versions.
+        code_args = []
+
+        for attr in (
+            "argcount",
+            "posonlyargcount",  # Python 3.8
+            "kwonlyargcount",  # Python 3
+            "nlocals",
+            "stacksize",
+            "flags",
+            "code",  # codestring
+            "consts",  # constants
+            "names",
+            "varnames",
+            ("filename", filename),
+            ("name", location),
+            "firstlineno",
+            "lnotab",
+            "freevars",
+            "cellvars",
+        ):
+            if isinstance(attr, tuple):
+                # Replace with given value.
+                code_args.append(attr[1])
+                continue
+
+            try:
+                # Copy original value if it exists.
+                code_args.append(getattr(code, "co_" + attr))
+            except AttributeError:
+                # Some arguments were added later.
+                continue
+
+        code = CodeType(*code_args)
+    except Exception:
+        # Some environments such as Google App Engine don't support
+        # modifying code objects.
+        pass
+
+    # Execute the new code, which is guaranteed to raise, and return
+    # the new traceback without this frame.
+    try:
+        exec(code, globals, locals)
+    except BaseException:
+        return sys.exc_info()[2].tb_next
+
+
+def get_template_locals(real_locals):
+    """Based on the runtime locals, get the context that would be
+    available at that point in the template.
+    """
+    # Start with the current template context.
+    ctx = real_locals.get("context")
+
+    if ctx:
+        data = ctx.get_all().copy()
+    else:
+        data = {}
+
+    # Might be in a derived context that only sets local variables
+    # rather than pushing a context. Local variables follow the scheme
+    # l_depth_name. Find the highest-depth local that has a value for
+    # each name.
+    local_overrides = {}
+
+    for name, value in real_locals.items():
+        if not name.startswith("l_") or value is missing:
+            # Not a template variable, or no longer relevant.
+            continue
+
+        try:
+            _, depth, name = name.split("_", 2)
+            depth = int(depth)
+        except ValueError:
+            continue
+
+        cur_depth = local_overrides.get(name, (-1,))[0]
+
+        if cur_depth < depth:
+            local_overrides[name] = (depth, value)
+
+    # Modify the context with any derived context.
+    for name, (_, value) in local_overrides.items():
+        if value is missing:
+            data.pop(name, None)
+        else:
+            data[name] = value
+
+    return data
+
+
+if sys.version_info >= (3, 7):
+    # tb_next is directly assignable as of Python 3.7
+    def tb_set_next(tb, tb_next):
+        tb.tb_next = tb_next
+        return tb
+
+
+elif PYPY:
+    # PyPy might have special support, and won't work with ctypes.
+    try:
+        import tputil
+    except ImportError:
+        # Without tproxy support, use the original traceback.
+        def tb_set_next(tb, tb_next):
+            return tb
+
+    else:
+        # With tproxy support, create a proxy around the traceback that
+        # returns the new tb_next.
+        def tb_set_next(tb, tb_next):
+            def controller(op):
+                if op.opname == "__getattribute__" and op.args[0] == "tb_next":
+                    return tb_next
+
+                return op.delegate()
+
+            return tputil.make_proxy(controller, obj=tb)
+
+
+else:
+    # Use ctypes to assign tb_next at the C level since it's read-only
+    # from Python.
+    import ctypes
+
+    class _CTraceback(ctypes.Structure):
+        _fields_ = [
+            # Extra PyObject slots when compiled with Py_TRACE_REFS.
+            ("PyObject_HEAD", ctypes.c_byte * object().__sizeof__()),
+            # Only care about tb_next as an object, not a traceback.
+            ("tb_next", ctypes.py_object),
+        ]
+
+    def tb_set_next(tb, tb_next):
+        c_tb = _CTraceback.from_address(id(tb))
+
+        # Clear out the old tb_next.
+        if tb.tb_next is not None:
+            c_tb_next = ctypes.py_object(tb.tb_next)
+            c_tb.tb_next = ctypes.py_object()
+            ctypes.pythonapi.Py_DecRef(c_tb_next)
+
+        # Assign the new tb_next.
+        if tb_next is not None:
+            c_tb_next = ctypes.py_object(tb_next)
+            ctypes.pythonapi.Py_IncRef(c_tb_next)
+            c_tb.tb_next = c_tb_next
+
+        return tb
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/defaults.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/defaults.py
new file mode 100644
index 0000000..8e0e7d7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/defaults.py
@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+from ._compat import range_type
+from .filters import FILTERS as DEFAULT_FILTERS  # noqa: F401
+from .tests import TESTS as DEFAULT_TESTS  # noqa: F401
+from .utils import Cycler
+from .utils import generate_lorem_ipsum
+from .utils import Joiner
+from .utils import Namespace
+
+# defaults for the parser / lexer
+BLOCK_START_STRING = "{%"
+BLOCK_END_STRING = "%}"
+VARIABLE_START_STRING = "{{"
+VARIABLE_END_STRING = "}}"
+COMMENT_START_STRING = "{#"
+COMMENT_END_STRING = "#}"
+LINE_STATEMENT_PREFIX = None
+LINE_COMMENT_PREFIX = None
+TRIM_BLOCKS = False
+LSTRIP_BLOCKS = False
+NEWLINE_SEQUENCE = "\n"
+KEEP_TRAILING_NEWLINE = False
+
+# default filters, tests and namespace
+
+DEFAULT_NAMESPACE = {
+    "range": range_type,
+    "dict": dict,
+    "lipsum": generate_lorem_ipsum,
+    "cycler": Cycler,
+    "joiner": Joiner,
+    "namespace": Namespace,
+}
+
+# default policies
+DEFAULT_POLICIES = {
+    "compiler.ascii_str": True,
+    "urlize.rel": "noopener",
+    "urlize.target": None,
+    "truncate.leeway": 5,
+    "json.dumps_function": None,
+    "json.dumps_kwargs": {"sort_keys": True},
+    "ext.i18n.trimmed": False,
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/environment.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/environment.py
new file mode 100644
index 0000000..8430390
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/environment.py
@@ -0,0 +1,1362 @@
+# -*- coding: utf-8 -*-
+"""Classes for managing templates and their runtime and compile time
+options.
+"""
+import os
+import sys
+import weakref
+from functools import partial
+from functools import reduce
+
+from markupsafe import Markup
+
+from . import nodes
+from ._compat import encode_filename
+from ._compat import implements_iterator
+from ._compat import implements_to_string
+from ._compat import iteritems
+from ._compat import PY2
+from ._compat import PYPY
+from ._compat import reraise
+from ._compat import string_types
+from ._compat import text_type
+from .compiler import CodeGenerator
+from .compiler import generate
+from .defaults import BLOCK_END_STRING
+from .defaults import BLOCK_START_STRING
+from .defaults import COMMENT_END_STRING
+from .defaults import COMMENT_START_STRING
+from .defaults import DEFAULT_FILTERS
+from .defaults import DEFAULT_NAMESPACE
+from .defaults import DEFAULT_POLICIES
+from .defaults import DEFAULT_TESTS
+from .defaults import KEEP_TRAILING_NEWLINE
+from .defaults import LINE_COMMENT_PREFIX
+from .defaults import LINE_STATEMENT_PREFIX
+from .defaults import LSTRIP_BLOCKS
+from .defaults import NEWLINE_SEQUENCE
+from .defaults import TRIM_BLOCKS
+from .defaults import VARIABLE_END_STRING
+from .defaults import VARIABLE_START_STRING
+from .exceptions import TemplateNotFound
+from .exceptions import TemplateRuntimeError
+from .exceptions import TemplatesNotFound
+from .exceptions import TemplateSyntaxError
+from .exceptions import UndefinedError
+from .lexer import get_lexer
+from .lexer import TokenStream
+from .nodes import EvalContext
+from .parser import Parser
+from .runtime import Context
+from .runtime import new_context
+from .runtime import Undefined
+from .utils import concat
+from .utils import consume
+from .utils import have_async_gen
+from .utils import import_string
+from .utils import internalcode
+from .utils import LRUCache
+from .utils import missing
+
+# for direct template usage we have up to ten living environments
+_spontaneous_environments = LRUCache(10)
+
+
+def get_spontaneous_environment(cls, *args):
+    """Return a new spontaneous environment. A spontaneous environment
+    is used for templates created directly rather than through an
+    existing environment.
+
+    :param cls: Environment class to create.
+    :param args: Positional arguments passed to environment.
+    """
+    key = (cls, args)
+
+    try:
+        return _spontaneous_environments[key]
+    except KeyError:
+        _spontaneous_environments[key] = env = cls(*args)
+        env.shared = True
+        return env
+
+
+def create_cache(size):
+    """Return the cache class for the given size."""
+    if size == 0:
+        return None
+    if size < 0:
+        return {}
+    return LRUCache(size)
+
+
+def copy_cache(cache):
+    """Create an empty copy of the given cache."""
+    if cache is None:
+        return None
+    elif type(cache) is dict:
+        return {}
+    return LRUCache(cache.capacity)
+
+
+def load_extensions(environment, extensions):
+    """Load the extensions from the list and bind it to the environment.
+    Returns a dict of instantiated environments.
+    """
+    result = {}
+    for extension in extensions:
+        if isinstance(extension, string_types):
+            extension = import_string(extension)
+        result[extension.identifier] = extension(environment)
+    return result
+
+
+def fail_for_missing_callable(string, name):
+    msg = string % name
+    if isinstance(name, Undefined):
+        try:
+            name._fail_with_undefined_error()
+        except Exception as e:
+            msg = "%s (%s; did you forget to quote the callable name?)" % (msg, e)
+    raise TemplateRuntimeError(msg)
+
+
+def _environment_sanity_check(environment):
+    """Perform a sanity check on the environment."""
+    assert issubclass(
+        environment.undefined, Undefined
+    ), "undefined must be a subclass of undefined because filters depend on it."
+    assert (
+        environment.block_start_string
+        != environment.variable_start_string
+        != environment.comment_start_string
+    ), "block, variable and comment start strings must be different"
+    assert environment.newline_sequence in (
+        "\r",
+        "\r\n",
+        "\n",
+    ), "newline_sequence set to unknown line ending string."
+    return environment
+
+
+class Environment(object):
+    r"""The core component of Jinja is the `Environment`.  It contains
+    important shared variables like configuration, filters, tests,
+    globals and others.  Instances of this class may be modified if
+    they are not shared and if no template was loaded so far.
+    Modifications on environments after the first template was loaded
+    will lead to surprising effects and undefined behavior.
+
+    Here are the possible initialization parameters:
+
+        `block_start_string`
+            The string marking the beginning of a block.  Defaults to ``'{%'``.
+
+        `block_end_string`
+            The string marking the end of a block.  Defaults to ``'%}'``.
+
+        `variable_start_string`
+            The string marking the beginning of a print statement.
+            Defaults to ``'{{'``.
+
+        `variable_end_string`
+            The string marking the end of a print statement.  Defaults to
+            ``'}}'``.
+
+        `comment_start_string`
+            The string marking the beginning of a comment.  Defaults to ``'{#'``.
+
+        `comment_end_string`
+            The string marking the end of a comment.  Defaults to ``'#}'``.
+
+        `line_statement_prefix`
+            If given and a string, this will be used as prefix for line based
+            statements.  See also :ref:`line-statements`.
+
+        `line_comment_prefix`
+            If given and a string, this will be used as prefix for line based
+            comments.  See also :ref:`line-statements`.
+
+            .. versionadded:: 2.2
+
+        `trim_blocks`
+            If this is set to ``True`` the first newline after a block is
+            removed (block, not variable tag!).  Defaults to `False`.
+
+        `lstrip_blocks`
+            If this is set to ``True`` leading spaces and tabs are stripped
+            from the start of a line to a block.  Defaults to `False`.
+
+        `newline_sequence`
+            The sequence that starts a newline.  Must be one of ``'\r'``,
+            ``'\n'`` or ``'\r\n'``.  The default is ``'\n'`` which is a
+            useful default for Linux and OS X systems as well as web
+            applications.
+
+        `keep_trailing_newline`
+            Preserve the trailing newline when rendering templates.
+            The default is ``False``, which causes a single newline,
+            if present, to be stripped from the end of the template.
+
+            .. versionadded:: 2.7
+
+        `extensions`
+            List of Jinja extensions to use.  This can either be import paths
+            as strings or extension classes.  For more information have a
+            look at :ref:`the extensions documentation <jinja-extensions>`.
+
+        `optimized`
+            should the optimizer be enabled?  Default is ``True``.
+
+        `undefined`
+            :class:`Undefined` or a subclass of it that is used to represent
+            undefined values in the template.
+
+        `finalize`
+            A callable that can be used to process the result of a variable
+            expression before it is output.  For example one can convert
+            ``None`` implicitly into an empty string here.
+
+        `autoescape`
+            If set to ``True`` the XML/HTML autoescaping feature is enabled by
+            default.  For more details about autoescaping see
+            :class:`~markupsafe.Markup`.  As of Jinja 2.4 this can also
+            be a callable that is passed the template name and has to
+            return ``True`` or ``False`` depending on autoescape should be
+            enabled by default.
+
+            .. versionchanged:: 2.4
+               `autoescape` can now be a function
+
+        `loader`
+            The template loader for this environment.
+
+        `cache_size`
+            The size of the cache.  Per default this is ``400`` which means
+            that if more than 400 templates are loaded the loader will clean
+            out the least recently used template.  If the cache size is set to
+            ``0`` templates are recompiled all the time, if the cache size is
+            ``-1`` the cache will not be cleaned.
+
+            .. versionchanged:: 2.8
+               The cache size was increased to 400 from a low 50.
+
+        `auto_reload`
+            Some loaders load templates from locations where the template
+            sources may change (ie: file system or database).  If
+            ``auto_reload`` is set to ``True`` (default) every time a template is
+            requested the loader checks if the source changed and if yes, it
+            will reload the template.  For higher performance it's possible to
+            disable that.
+
+        `bytecode_cache`
+            If set to a bytecode cache object, this object will provide a
+            cache for the internal Jinja bytecode so that templates don't
+            have to be parsed if they were not changed.
+
+            See :ref:`bytecode-cache` for more information.
+
+        `enable_async`
+            If set to true this enables async template execution which allows
+            you to take advantage of newer Python features.  This requires
+            Python 3.6 or later.
+    """
+
+    #: if this environment is sandboxed.  Modifying this variable won't make
+    #: the environment sandboxed though.  For a real sandboxed environment
+    #: have a look at jinja2.sandbox.  This flag alone controls the code
+    #: generation by the compiler.
+    sandboxed = False
+
+    #: True if the environment is just an overlay
+    overlayed = False
+
+    #: the environment this environment is linked to if it is an overlay
+    linked_to = None
+
+    #: shared environments have this set to `True`.  A shared environment
+    #: must not be modified
+    shared = False
+
+    #: the class that is used for code generation.  See
+    #: :class:`~jinja2.compiler.CodeGenerator` for more information.
+    code_generator_class = CodeGenerator
+
+    #: the context class thatis used for templates.  See
+    #: :class:`~jinja2.runtime.Context` for more information.
+    context_class = Context
+
+    def __init__(
+        self,
+        block_start_string=BLOCK_START_STRING,
+        block_end_string=BLOCK_END_STRING,
+        variable_start_string=VARIABLE_START_STRING,
+        variable_end_string=VARIABLE_END_STRING,
+        comment_start_string=COMMENT_START_STRING,
+        comment_end_string=COMMENT_END_STRING,
+        line_statement_prefix=LINE_STATEMENT_PREFIX,
+        line_comment_prefix=LINE_COMMENT_PREFIX,
+        trim_blocks=TRIM_BLOCKS,
+        lstrip_blocks=LSTRIP_BLOCKS,
+        newline_sequence=NEWLINE_SEQUENCE,
+        keep_trailing_newline=KEEP_TRAILING_NEWLINE,
+        extensions=(),
+        optimized=True,
+        undefined=Undefined,
+        finalize=None,
+        autoescape=False,
+        loader=None,
+        cache_size=400,
+        auto_reload=True,
+        bytecode_cache=None,
+        enable_async=False,
+    ):
+        # !!Important notice!!
+        #   The constructor accepts quite a few arguments that should be
+        #   passed by keyword rather than position.  However it's important to
+        #   not change the order of arguments because it's used at least
+        #   internally in those cases:
+        #       -   spontaneous environments (i18n extension and Template)
+        #       -   unittests
+        #   If parameter changes are required only add parameters at the end
+        #   and don't change the arguments (or the defaults!) of the arguments
+        #   existing already.
+
+        # lexer / parser information
+        self.block_start_string = block_start_string
+        self.block_end_string = block_end_string
+        self.variable_start_string = variable_start_string
+        self.variable_end_string = variable_end_string
+        self.comment_start_string = comment_start_string
+        self.comment_end_string = comment_end_string
+        self.line_statement_prefix = line_statement_prefix
+        self.line_comment_prefix = line_comment_prefix
+        self.trim_blocks = trim_blocks
+        self.lstrip_blocks = lstrip_blocks
+        self.newline_sequence = newline_sequence
+        self.keep_trailing_newline = keep_trailing_newline
+
+        # runtime information
+        self.undefined = undefined
+        self.optimized = optimized
+        self.finalize = finalize
+        self.autoescape = autoescape
+
+        # defaults
+        self.filters = DEFAULT_FILTERS.copy()
+        self.tests = DEFAULT_TESTS.copy()
+        self.globals = DEFAULT_NAMESPACE.copy()
+
+        # set the loader provided
+        self.loader = loader
+        self.cache = create_cache(cache_size)
+        self.bytecode_cache = bytecode_cache
+        self.auto_reload = auto_reload
+
+        # configurable policies
+        self.policies = DEFAULT_POLICIES.copy()
+
+        # load extensions
+        self.extensions = load_extensions(self, extensions)
+
+        self.enable_async = enable_async
+        self.is_async = self.enable_async and have_async_gen
+        if self.is_async:
+            # runs patch_all() to enable async support
+            from . import asyncsupport  # noqa: F401
+
+        _environment_sanity_check(self)
+
+    def add_extension(self, extension):
+        """Adds an extension after the environment was created.
+
+        .. versionadded:: 2.5
+        """
+        self.extensions.update(load_extensions(self, [extension]))
+
+    def extend(self, **attributes):
+        """Add the items to the instance of the environment if they do not exist
+        yet.  This is used by :ref:`extensions <writing-extensions>` to register
+        callbacks and configuration values without breaking inheritance.
+        """
+        for key, value in iteritems(attributes):
+            if not hasattr(self, key):
+                setattr(self, key, value)
+
+    def overlay(
+        self,
+        block_start_string=missing,
+        block_end_string=missing,
+        variable_start_string=missing,
+        variable_end_string=missing,
+        comment_start_string=missing,
+        comment_end_string=missing,
+        line_statement_prefix=missing,
+        line_comment_prefix=missing,
+        trim_blocks=missing,
+        lstrip_blocks=missing,
+        extensions=missing,
+        optimized=missing,
+        undefined=missing,
+        finalize=missing,
+        autoescape=missing,
+        loader=missing,
+        cache_size=missing,
+        auto_reload=missing,
+        bytecode_cache=missing,
+    ):
+        """Create a new overlay environment that shares all the data with the
+        current environment except for cache and the overridden attributes.
+        Extensions cannot be removed for an overlayed environment.  An overlayed
+        environment automatically gets all the extensions of the environment it
+        is linked to plus optional extra extensions.
+
+        Creating overlays should happen after the initial environment was set
+        up completely.  Not all attributes are truly linked, some are just
+        copied over so modifications on the original environment may not shine
+        through.
+        """
+        args = dict(locals())
+        del args["self"], args["cache_size"], args["extensions"]
+
+        rv = object.__new__(self.__class__)
+        rv.__dict__.update(self.__dict__)
+        rv.overlayed = True
+        rv.linked_to = self
+
+        for key, value in iteritems(args):
+            if value is not missing:
+                setattr(rv, key, value)
+
+        if cache_size is not missing:
+            rv.cache = create_cache(cache_size)
+        else:
+            rv.cache = copy_cache(self.cache)
+
+        rv.extensions = {}
+        for key, value in iteritems(self.extensions):
+            rv.extensions[key] = value.bind(rv)
+        if extensions is not missing:
+            rv.extensions.update(load_extensions(rv, extensions))
+
+        return _environment_sanity_check(rv)
+
+    lexer = property(get_lexer, doc="The lexer for this environment.")
+
+    def iter_extensions(self):
+        """Iterates over the extensions by priority."""
+        return iter(sorted(self.extensions.values(), key=lambda x: x.priority))
+
+    def getitem(self, obj, argument):
+        """Get an item or attribute of an object but prefer the item."""
+        try:
+            return obj[argument]
+        except (AttributeError, TypeError, LookupError):
+            if isinstance(argument, string_types):
+                try:
+                    attr = str(argument)
+                except Exception:
+                    pass
+                else:
+                    try:
+                        return getattr(obj, attr)
+                    except AttributeError:
+                        pass
+            return self.undefined(obj=obj, name=argument)
+
+    def getattr(self, obj, attribute):
+        """Get an item or attribute of an object but prefer the attribute.
+        Unlike :meth:`getitem` the attribute *must* be a bytestring.
+        """
+        try:
+            return getattr(obj, attribute)
+        except AttributeError:
+            pass
+        try:
+            return obj[attribute]
+        except (TypeError, LookupError, AttributeError):
+            return self.undefined(obj=obj, name=attribute)
+
+    def call_filter(
+        self, name, value, args=None, kwargs=None, context=None, eval_ctx=None
+    ):
+        """Invokes a filter on a value the same way the compiler does it.
+
+        Note that on Python 3 this might return a coroutine in case the
+        filter is running from an environment in async mode and the filter
+        supports async execution.  It's your responsibility to await this
+        if needed.
+
+        .. versionadded:: 2.7
+        """
+        func = self.filters.get(name)
+        if func is None:
+            fail_for_missing_callable("no filter named %r", name)
+        args = [value] + list(args or ())
+        if getattr(func, "contextfilter", False) is True:
+            if context is None:
+                raise TemplateRuntimeError(
+                    "Attempted to invoke context filter without context"
+                )
+            args.insert(0, context)
+        elif getattr(func, "evalcontextfilter", False) is True:
+            if eval_ctx is None:
+                if context is not None:
+                    eval_ctx = context.eval_ctx
+                else:
+                    eval_ctx = EvalContext(self)
+            args.insert(0, eval_ctx)
+        elif getattr(func, "environmentfilter", False) is True:
+            args.insert(0, self)
+        return func(*args, **(kwargs or {}))
+
+    def call_test(self, name, value, args=None, kwargs=None):
+        """Invokes a test on a value the same way the compiler does it.
+
+        .. versionadded:: 2.7
+        """
+        func = self.tests.get(name)
+        if func is None:
+            fail_for_missing_callable("no test named %r", name)
+        return func(value, *(args or ()), **(kwargs or {}))
+
+    @internalcode
+    def parse(self, source, name=None, filename=None):
+        """Parse the sourcecode and return the abstract syntax tree.  This
+        tree of nodes is used by the compiler to convert the template into
+        executable source- or bytecode.  This is useful for debugging or to
+        extract information from templates.
+
+        If you are :ref:`developing Jinja extensions <writing-extensions>`
+        this gives you a good overview of the node tree generated.
+        """
+        try:
+            return self._parse(source, name, filename)
+        except TemplateSyntaxError:
+            self.handle_exception(source=source)
+
+    def _parse(self, source, name, filename):
+        """Internal parsing function used by `parse` and `compile`."""
+        return Parser(self, source, name, encode_filename(filename)).parse()
+
+    def lex(self, source, name=None, filename=None):
+        """Lex the given sourcecode and return a generator that yields
+        tokens as tuples in the form ``(lineno, token_type, value)``.
+        This can be useful for :ref:`extension development <writing-extensions>`
+        and debugging templates.
+
+        This does not perform preprocessing.  If you want the preprocessing
+        of the extensions to be applied you have to filter source through
+        the :meth:`preprocess` method.
+        """
+        source = text_type(source)
+        try:
+            return self.lexer.tokeniter(source, name, filename)
+        except TemplateSyntaxError:
+            self.handle_exception(source=source)
+
+    def preprocess(self, source, name=None, filename=None):
+        """Preprocesses the source with all extensions.  This is automatically
+        called for all parsing and compiling methods but *not* for :meth:`lex`
+        because there you usually only want the actual source tokenized.
+        """
+        return reduce(
+            lambda s, e: e.preprocess(s, name, filename),
+            self.iter_extensions(),
+            text_type(source),
+        )
+
+    def _tokenize(self, source, name, filename=None, state=None):
+        """Called by the parser to do the preprocessing and filtering
+        for all the extensions.  Returns a :class:`~jinja2.lexer.TokenStream`.
+        """
+        source = self.preprocess(source, name, filename)
+        stream = self.lexer.tokenize(source, name, filename, state)
+        for ext in self.iter_extensions():
+            stream = ext.filter_stream(stream)
+            if not isinstance(stream, TokenStream):
+                stream = TokenStream(stream, name, filename)
+        return stream
+
+    def _generate(self, source, name, filename, defer_init=False):
+        """Internal hook that can be overridden to hook a different generate
+        method in.
+
+        .. versionadded:: 2.5
+        """
+        return generate(
+            source,
+            self,
+            name,
+            filename,
+            defer_init=defer_init,
+            optimized=self.optimized,
+        )
+
+    def _compile(self, source, filename):
+        """Internal hook that can be overridden to hook a different compile
+        method in.
+
+        .. versionadded:: 2.5
+        """
+        return compile(source, filename, "exec")
+
+    @internalcode
+    def compile(self, source, name=None, filename=None, raw=False, defer_init=False):
+        """Compile a node or template source code.  The `name` parameter is
+        the load name of the template after it was joined using
+        :meth:`join_path` if necessary, not the filename on the file system.
+        the `filename` parameter is the estimated filename of the template on
+        the file system.  If the template came from a database or memory this
+        can be omitted.
+
+        The return value of this method is a python code object.  If the `raw`
+        parameter is `True` the return value will be a string with python
+        code equivalent to the bytecode returned otherwise.  This method is
+        mainly used internally.
+
+        `defer_init` is use internally to aid the module code generator.  This
+        causes the generated code to be able to import without the global
+        environment variable to be set.
+
+        .. versionadded:: 2.4
+           `defer_init` parameter added.
+        """
+        source_hint = None
+        try:
+            if isinstance(source, string_types):
+                source_hint = source
+                source = self._parse(source, name, filename)
+            source = self._generate(source, name, filename, defer_init=defer_init)
+            if raw:
+                return source
+            if filename is None:
+                filename = "<template>"
+            else:
+                filename = encode_filename(filename)
+            return self._compile(source, filename)
+        except TemplateSyntaxError:
+            self.handle_exception(source=source_hint)
+
+    def compile_expression(self, source, undefined_to_none=True):
+        """A handy helper method that returns a callable that accepts keyword
+        arguments that appear as variables in the expression.  If called it
+        returns the result of the expression.
+
+        This is useful if applications want to use the same rules as Jinja
+        in template "configuration files" or similar situations.
+
+        Example usage:
+
+        >>> env = Environment()
+        >>> expr = env.compile_expression('foo == 42')
+        >>> expr(foo=23)
+        False
+        >>> expr(foo=42)
+        True
+
+        Per default the return value is converted to `None` if the
+        expression returns an undefined value.  This can be changed
+        by setting `undefined_to_none` to `False`.
+
+        >>> env.compile_expression('var')() is None
+        True
+        >>> env.compile_expression('var', undefined_to_none=False)()
+        Undefined
+
+        .. versionadded:: 2.1
+        """
+        parser = Parser(self, source, state="variable")
+        try:
+            expr = parser.parse_expression()
+            if not parser.stream.eos:
+                raise TemplateSyntaxError(
+                    "chunk after expression", parser.stream.current.lineno, None, None
+                )
+            expr.set_environment(self)
+        except TemplateSyntaxError:
+            if sys.exc_info() is not None:
+                self.handle_exception(source=source)
+
+        body = [nodes.Assign(nodes.Name("result", "store"), expr, lineno=1)]
+        template = self.from_string(nodes.Template(body, lineno=1))
+        return TemplateExpression(template, undefined_to_none)
+
+    def compile_templates(
+        self,
+        target,
+        extensions=None,
+        filter_func=None,
+        zip="deflated",
+        log_function=None,
+        ignore_errors=True,
+        py_compile=False,
+    ):
+        """Finds all the templates the loader can find, compiles them
+        and stores them in `target`.  If `zip` is `None`, instead of in a
+        zipfile, the templates will be stored in a directory.
+        By default a deflate zip algorithm is used. To switch to
+        the stored algorithm, `zip` can be set to ``'stored'``.
+
+        `extensions` and `filter_func` are passed to :meth:`list_templates`.
+        Each template returned will be compiled to the target folder or
+        zipfile.
+
+        By default template compilation errors are ignored.  In case a
+        log function is provided, errors are logged.  If you want template
+        syntax errors to abort the compilation you can set `ignore_errors`
+        to `False` and you will get an exception on syntax errors.
+
+        If `py_compile` is set to `True` .pyc files will be written to the
+        target instead of standard .py files.  This flag does not do anything
+        on pypy and Python 3 where pyc files are not picked up by itself and
+        don't give much benefit.
+
+        .. versionadded:: 2.4
+        """
+        from .loaders import ModuleLoader
+
+        if log_function is None:
+
+            def log_function(x):
+                pass
+
+        if py_compile:
+            if not PY2 or PYPY:
+                import warnings
+
+                warnings.warn(
+                    "'py_compile=True' has no effect on PyPy or Python"
+                    " 3 and will be removed in version 3.0",
+                    DeprecationWarning,
+                    stacklevel=2,
+                )
+                py_compile = False
+            else:
+                import imp
+                import marshal
+
+                py_header = imp.get_magic() + u"\xff\xff\xff\xff".encode("iso-8859-15")
+
+                # Python 3.3 added a source filesize to the header
+                if sys.version_info >= (3, 3):
+                    py_header += u"\x00\x00\x00\x00".encode("iso-8859-15")
+
+        def write_file(filename, data):
+            if zip:
+                info = ZipInfo(filename)
+                info.external_attr = 0o755 << 16
+                zip_file.writestr(info, data)
+            else:
+                if isinstance(data, text_type):
+                    data = data.encode("utf8")
+
+                with open(os.path.join(target, filename), "wb") as f:
+                    f.write(data)
+
+        if zip is not None:
+            from zipfile import ZipFile, ZipInfo, ZIP_DEFLATED, ZIP_STORED
+
+            zip_file = ZipFile(
+                target, "w", dict(deflated=ZIP_DEFLATED, stored=ZIP_STORED)[zip]
+            )
+            log_function('Compiling into Zip archive "%s"' % target)
+        else:
+            if not os.path.isdir(target):
+                os.makedirs(target)
+            log_function('Compiling into folder "%s"' % target)
+
+        try:
+            for name in self.list_templates(extensions, filter_func):
+                source, filename, _ = self.loader.get_source(self, name)
+                try:
+                    code = self.compile(source, name, filename, True, True)
+                except TemplateSyntaxError as e:
+                    if not ignore_errors:
+                        raise
+                    log_function('Could not compile "%s": %s' % (name, e))
+                    continue
+
+                filename = ModuleLoader.get_module_filename(name)
+
+                if py_compile:
+                    c = self._compile(code, encode_filename(filename))
+                    write_file(filename + "c", py_header + marshal.dumps(c))
+                    log_function('Byte-compiled "%s" as %s' % (name, filename + "c"))
+                else:
+                    write_file(filename, code)
+                    log_function('Compiled "%s" as %s' % (name, filename))
+        finally:
+            if zip:
+                zip_file.close()
+
+        log_function("Finished compiling templates")
+
+    def list_templates(self, extensions=None, filter_func=None):
+        """Returns a list of templates for this environment.  This requires
+        that the loader supports the loader's
+        :meth:`~BaseLoader.list_templates` method.
+
+        If there are other files in the template folder besides the
+        actual templates, the returned list can be filtered.  There are two
+        ways: either `extensions` is set to a list of file extensions for
+        templates, or a `filter_func` can be provided which is a callable that
+        is passed a template name and should return `True` if it should end up
+        in the result list.
+
+        If the loader does not support that, a :exc:`TypeError` is raised.
+
+        .. versionadded:: 2.4
+        """
+        names = self.loader.list_templates()
+
+        if extensions is not None:
+            if filter_func is not None:
+                raise TypeError(
+                    "either extensions or filter_func can be passed, but not both"
+                )
+
+            def filter_func(x):
+                return "." in x and x.rsplit(".", 1)[1] in extensions
+
+        if filter_func is not None:
+            names = [name for name in names if filter_func(name)]
+
+        return names
+
+    def handle_exception(self, source=None):
+        """Exception handling helper.  This is used internally to either raise
+        rewritten exceptions or return a rendered traceback for the template.
+        """
+        from .debug import rewrite_traceback_stack
+
+        reraise(*rewrite_traceback_stack(source=source))
+
+    def join_path(self, template, parent):
+        """Join a template with the parent.  By default all the lookups are
+        relative to the loader root so this method returns the `template`
+        parameter unchanged, but if the paths should be relative to the
+        parent template, this function can be used to calculate the real
+        template name.
+
+        Subclasses may override this method and implement template path
+        joining here.
+        """
+        return template
+
+    @internalcode
+    def _load_template(self, name, globals):
+        if self.loader is None:
+            raise TypeError("no loader for this environment specified")
+        cache_key = (weakref.ref(self.loader), name)
+        if self.cache is not None:
+            template = self.cache.get(cache_key)
+            if template is not None and (
+                not self.auto_reload or template.is_up_to_date
+            ):
+                return template
+        template = self.loader.load(self, name, globals)
+        if self.cache is not None:
+            self.cache[cache_key] = template
+        return template
+
+    @internalcode
+    def get_template(self, name, parent=None, globals=None):
+        """Load a template from the loader.  If a loader is configured this
+        method asks the loader for the template and returns a :class:`Template`.
+        If the `parent` parameter is not `None`, :meth:`join_path` is called
+        to get the real template name before loading.
+
+        The `globals` parameter can be used to provide template wide globals.
+        These variables are available in the context at render time.
+
+        If the template does not exist a :exc:`TemplateNotFound` exception is
+        raised.
+
+        .. versionchanged:: 2.4
+           If `name` is a :class:`Template` object it is returned from the
+           function unchanged.
+        """
+        if isinstance(name, Template):
+            return name
+        if parent is not None:
+            name = self.join_path(name, parent)
+        return self._load_template(name, self.make_globals(globals))
+
+    @internalcode
+    def select_template(self, names, parent=None, globals=None):
+        """Works like :meth:`get_template` but tries a number of templates
+        before it fails.  If it cannot find any of the templates, it will
+        raise a :exc:`TemplatesNotFound` exception.
+
+        .. versionchanged:: 2.11
+            If names is :class:`Undefined`, an :exc:`UndefinedError` is
+            raised instead. If no templates were found and names
+            contains :class:`Undefined`, the message is more helpful.
+
+        .. versionchanged:: 2.4
+           If `names` contains a :class:`Template` object it is returned
+           from the function unchanged.
+
+        .. versionadded:: 2.3
+        """
+        if isinstance(names, Undefined):
+            names._fail_with_undefined_error()
+
+        if not names:
+            raise TemplatesNotFound(
+                message=u"Tried to select from an empty list " u"of templates."
+            )
+        globals = self.make_globals(globals)
+        for name in names:
+            if isinstance(name, Template):
+                return name
+            if parent is not None:
+                name = self.join_path(name, parent)
+            try:
+                return self._load_template(name, globals)
+            except (TemplateNotFound, UndefinedError):
+                pass
+        raise TemplatesNotFound(names)
+
+    @internalcode
+    def get_or_select_template(self, template_name_or_list, parent=None, globals=None):
+        """Does a typecheck and dispatches to :meth:`select_template`
+        if an iterable of template names is given, otherwise to
+        :meth:`get_template`.
+
+        .. versionadded:: 2.3
+        """
+        if isinstance(template_name_or_list, (string_types, Undefined)):
+            return self.get_template(template_name_or_list, parent, globals)
+        elif isinstance(template_name_or_list, Template):
+            return template_name_or_list
+        return self.select_template(template_name_or_list, parent, globals)
+
+    def from_string(self, source, globals=None, template_class=None):
+        """Load a template from a string.  This parses the source given and
+        returns a :class:`Template` object.
+        """
+        globals = self.make_globals(globals)
+        cls = template_class or self.template_class
+        return cls.from_code(self, self.compile(source), globals, None)
+
+    def make_globals(self, d):
+        """Return a dict for the globals."""
+        if not d:
+            return self.globals
+        return dict(self.globals, **d)
+
+
+class Template(object):
+    """The central template object.  This class represents a compiled template
+    and is used to evaluate it.
+
+    Normally the template object is generated from an :class:`Environment` but
+    it also has a constructor that makes it possible to create a template
+    instance directly using the constructor.  It takes the same arguments as
+    the environment constructor but it's not possible to specify a loader.
+
+    Every template object has a few methods and members that are guaranteed
+    to exist.  However it's important that a template object should be
+    considered immutable.  Modifications on the object are not supported.
+
+    Template objects created from the constructor rather than an environment
+    do have an `environment` attribute that points to a temporary environment
+    that is probably shared with other templates created with the constructor
+    and compatible settings.
+
+    >>> template = Template('Hello {{ name }}!')
+    >>> template.render(name='John Doe') == u'Hello John Doe!'
+    True
+    >>> stream = template.stream(name='John Doe')
+    >>> next(stream) == u'Hello John Doe!'
+    True
+    >>> next(stream)
+    Traceback (most recent call last):
+        ...
+    StopIteration
+    """
+
+    #: Type of environment to create when creating a template directly
+    #: rather than through an existing environment.
+    environment_class = Environment
+
+    def __new__(
+        cls,
+        source,
+        block_start_string=BLOCK_START_STRING,
+        block_end_string=BLOCK_END_STRING,
+        variable_start_string=VARIABLE_START_STRING,
+        variable_end_string=VARIABLE_END_STRING,
+        comment_start_string=COMMENT_START_STRING,
+        comment_end_string=COMMENT_END_STRING,
+        line_statement_prefix=LINE_STATEMENT_PREFIX,
+        line_comment_prefix=LINE_COMMENT_PREFIX,
+        trim_blocks=TRIM_BLOCKS,
+        lstrip_blocks=LSTRIP_BLOCKS,
+        newline_sequence=NEWLINE_SEQUENCE,
+        keep_trailing_newline=KEEP_TRAILING_NEWLINE,
+        extensions=(),
+        optimized=True,
+        undefined=Undefined,
+        finalize=None,
+        autoescape=False,
+        enable_async=False,
+    ):
+        env = get_spontaneous_environment(
+            cls.environment_class,
+            block_start_string,
+            block_end_string,
+            variable_start_string,
+            variable_end_string,
+            comment_start_string,
+            comment_end_string,
+            line_statement_prefix,
+            line_comment_prefix,
+            trim_blocks,
+            lstrip_blocks,
+            newline_sequence,
+            keep_trailing_newline,
+            frozenset(extensions),
+            optimized,
+            undefined,
+            finalize,
+            autoescape,
+            None,
+            0,
+            False,
+            None,
+            enable_async,
+        )
+        return env.from_string(source, template_class=cls)
+
+    @classmethod
+    def from_code(cls, environment, code, globals, uptodate=None):
+        """Creates a template object from compiled code and the globals.  This
+        is used by the loaders and environment to create a template object.
+        """
+        namespace = {"environment": environment, "__file__": code.co_filename}
+        exec(code, namespace)
+        rv = cls._from_namespace(environment, namespace, globals)
+        rv._uptodate = uptodate
+        return rv
+
+    @classmethod
+    def from_module_dict(cls, environment, module_dict, globals):
+        """Creates a template object from a module.  This is used by the
+        module loader to create a template object.
+
+        .. versionadded:: 2.4
+        """
+        return cls._from_namespace(environment, module_dict, globals)
+
+    @classmethod
+    def _from_namespace(cls, environment, namespace, globals):
+        t = object.__new__(cls)
+        t.environment = environment
+        t.globals = globals
+        t.name = namespace["name"]
+        t.filename = namespace["__file__"]
+        t.blocks = namespace["blocks"]
+
+        # render function and module
+        t.root_render_func = namespace["root"]
+        t._module = None
+
+        # debug and loader helpers
+        t._debug_info = namespace["debug_info"]
+        t._uptodate = None
+
+        # store the reference
+        namespace["environment"] = environment
+        namespace["__jinja_template__"] = t
+
+        return t
+
+    def render(self, *args, **kwargs):
+        """This method accepts the same arguments as the `dict` constructor:
+        A dict, a dict subclass or some keyword arguments.  If no arguments
+        are given the context will be empty.  These two calls do the same::
+
+            template.render(knights='that say nih')
+            template.render({'knights': 'that say nih'})
+
+        This will return the rendered template as unicode string.
+        """
+        vars = dict(*args, **kwargs)
+        try:
+            return concat(self.root_render_func(self.new_context(vars)))
+        except Exception:
+            self.environment.handle_exception()
+
+    def render_async(self, *args, **kwargs):
+        """This works similar to :meth:`render` but returns a coroutine
+        that when awaited returns the entire rendered template string.  This
+        requires the async feature to be enabled.
+
+        Example usage::
+
+            await template.render_async(knights='that say nih; asynchronously')
+        """
+        # see asyncsupport for the actual implementation
+        raise NotImplementedError(
+            "This feature is not available for this version of Python"
+        )
+
+    def stream(self, *args, **kwargs):
+        """Works exactly like :meth:`generate` but returns a
+        :class:`TemplateStream`.
+        """
+        return TemplateStream(self.generate(*args, **kwargs))
+
+    def generate(self, *args, **kwargs):
+        """For very large templates it can be useful to not render the whole
+        template at once but evaluate each statement after another and yield
+        piece for piece.  This method basically does exactly that and returns
+        a generator that yields one item after another as unicode strings.
+
+        It accepts the same arguments as :meth:`render`.
+        """
+        vars = dict(*args, **kwargs)
+        try:
+            for event in self.root_render_func(self.new_context(vars)):
+                yield event
+        except Exception:
+            yield self.environment.handle_exception()
+
+    def generate_async(self, *args, **kwargs):
+        """An async version of :meth:`generate`.  Works very similarly but
+        returns an async iterator instead.
+        """
+        # see asyncsupport for the actual implementation
+        raise NotImplementedError(
+            "This feature is not available for this version of Python"
+        )
+
+    def new_context(self, vars=None, shared=False, locals=None):
+        """Create a new :class:`Context` for this template.  The vars
+        provided will be passed to the template.  Per default the globals
+        are added to the context.  If shared is set to `True` the data
+        is passed as is to the context without adding the globals.
+
+        `locals` can be a dict of local variables for internal usage.
+        """
+        return new_context(
+            self.environment, self.name, self.blocks, vars, shared, self.globals, locals
+        )
+
+    def make_module(self, vars=None, shared=False, locals=None):
+        """This method works like the :attr:`module` attribute when called
+        without arguments but it will evaluate the template on every call
+        rather than caching it.  It's also possible to provide
+        a dict which is then used as context.  The arguments are the same
+        as for the :meth:`new_context` method.
+        """
+        return TemplateModule(self, self.new_context(vars, shared, locals))
+
+    def make_module_async(self, vars=None, shared=False, locals=None):
+        """As template module creation can invoke template code for
+        asynchronous executions this method must be used instead of the
+        normal :meth:`make_module` one.  Likewise the module attribute
+        becomes unavailable in async mode.
+        """
+        # see asyncsupport for the actual implementation
+        raise NotImplementedError(
+            "This feature is not available for this version of Python"
+        )
+
+    @internalcode
+    def _get_default_module(self):
+        if self._module is not None:
+            return self._module
+        self._module = rv = self.make_module()
+        return rv
+
+    @property
+    def module(self):
+        """The template as module.  This is used for imports in the
+        template runtime but is also useful if one wants to access
+        exported template variables from the Python layer:
+
+        >>> t = Template('{% macro foo() %}42{% endmacro %}23')
+        >>> str(t.module)
+        '23'
+        >>> t.module.foo() == u'42'
+        True
+
+        This attribute is not available if async mode is enabled.
+        """
+        return self._get_default_module()
+
+    def get_corresponding_lineno(self, lineno):
+        """Return the source line number of a line number in the
+        generated bytecode as they are not in sync.
+        """
+        for template_line, code_line in reversed(self.debug_info):
+            if code_line <= lineno:
+                return template_line
+        return 1
+
+    @property
+    def is_up_to_date(self):
+        """If this variable is `False` there is a newer version available."""
+        if self._uptodate is None:
+            return True
+        return self._uptodate()
+
+    @property
+    def debug_info(self):
+        """The debug info mapping."""
+        if self._debug_info:
+            return [tuple(map(int, x.split("="))) for x in self._debug_info.split("&")]
+        return []
+
+    def __repr__(self):
+        if self.name is None:
+            name = "memory:%x" % id(self)
+        else:
+            name = repr(self.name)
+        return "<%s %s>" % (self.__class__.__name__, name)
+
+
+@implements_to_string
+class TemplateModule(object):
+    """Represents an imported template.  All the exported names of the
+    template are available as attributes on this object.  Additionally
+    converting it into an unicode- or bytestrings renders the contents.
+    """
+
+    def __init__(self, template, context, body_stream=None):
+        if body_stream is None:
+            if context.environment.is_async:
+                raise RuntimeError(
+                    "Async mode requires a body stream "
+                    "to be passed to a template module.  Use "
+                    "the async methods of the API you are "
+                    "using."
+                )
+            body_stream = list(template.root_render_func(context))
+        self._body_stream = body_stream
+        self.__dict__.update(context.get_exported())
+        self.__name__ = template.name
+
+    def __html__(self):
+        return Markup(concat(self._body_stream))
+
+    def __str__(self):
+        return concat(self._body_stream)
+
+    def __repr__(self):
+        if self.__name__ is None:
+            name = "memory:%x" % id(self)
+        else:
+            name = repr(self.__name__)
+        return "<%s %s>" % (self.__class__.__name__, name)
+
+
+class TemplateExpression(object):
+    """The :meth:`jinja2.Environment.compile_expression` method returns an
+    instance of this object.  It encapsulates the expression-like access
+    to the template with an expression it wraps.
+    """
+
+    def __init__(self, template, undefined_to_none):
+        self._template = template
+        self._undefined_to_none = undefined_to_none
+
+    def __call__(self, *args, **kwargs):
+        context = self._template.new_context(dict(*args, **kwargs))
+        consume(self._template.root_render_func(context))
+        rv = context.vars["result"]
+        if self._undefined_to_none and isinstance(rv, Undefined):
+            rv = None
+        return rv
+
+
+@implements_iterator
+class TemplateStream(object):
+    """A template stream works pretty much like an ordinary python generator
+    but it can buffer multiple items to reduce the number of total iterations.
+    Per default the output is unbuffered which means that for every unbuffered
+    instruction in the template one unicode string is yielded.
+
+    If buffering is enabled with a buffer size of 5, five items are combined
+    into a new unicode string.  This is mainly useful if you are streaming
+    big templates to a client via WSGI which flushes after each iteration.
+    """
+
+    def __init__(self, gen):
+        self._gen = gen
+        self.disable_buffering()
+
+    def dump(self, fp, encoding=None, errors="strict"):
+        """Dump the complete stream into a file or file-like object.
+        Per default unicode strings are written, if you want to encode
+        before writing specify an `encoding`.
+
+        Example usage::
+
+            Template('Hello {{ name }}!').stream(name='foo').dump('hello.html')
+        """
+        close = False
+        if isinstance(fp, string_types):
+            if encoding is None:
+                encoding = "utf-8"
+            fp = open(fp, "wb")
+            close = True
+        try:
+            if encoding is not None:
+                iterable = (x.encode(encoding, errors) for x in self)
+            else:
+                iterable = self
+            if hasattr(fp, "writelines"):
+                fp.writelines(iterable)
+            else:
+                for item in iterable:
+                    fp.write(item)
+        finally:
+            if close:
+                fp.close()
+
+    def disable_buffering(self):
+        """Disable the output buffering."""
+        self._next = partial(next, self._gen)
+        self.buffered = False
+
+    def _buffered_generator(self, size):
+        buf = []
+        c_size = 0
+        push = buf.append
+
+        while 1:
+            try:
+                while c_size < size:
+                    c = next(self._gen)
+                    push(c)
+                    if c:
+                        c_size += 1
+            except StopIteration:
+                if not c_size:
+                    return
+            yield concat(buf)
+            del buf[:]
+            c_size = 0
+
+    def enable_buffering(self, size=5):
+        """Enable buffering.  Buffer `size` items before yielding them."""
+        if size <= 1:
+            raise ValueError("buffer size too small")
+
+        self.buffered = True
+        self._next = partial(next, self._buffered_generator(size))
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        return self._next()
+
+
+# hook in default template class.  if anyone reads this comment: ignore that
+# it's possible to use custom templates ;-)
+Environment.template_class = Template
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/exceptions.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/exceptions.py
new file mode 100644
index 0000000..0bf2003
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/exceptions.py
@@ -0,0 +1,177 @@
+# -*- coding: utf-8 -*-
+from ._compat import imap
+from ._compat import implements_to_string
+from ._compat import PY2
+from ._compat import text_type
+
+
+class TemplateError(Exception):
+    """Baseclass for all template errors."""
+
+    if PY2:
+
+        def __init__(self, message=None):
+            if message is not None:
+                message = text_type(message).encode("utf-8")
+            Exception.__init__(self, message)
+
+        @property
+        def message(self):
+            if self.args:
+                message = self.args[0]
+                if message is not None:
+                    return message.decode("utf-8", "replace")
+
+        def __unicode__(self):
+            return self.message or u""
+
+    else:
+
+        def __init__(self, message=None):
+            Exception.__init__(self, message)
+
+        @property
+        def message(self):
+            if self.args:
+                message = self.args[0]
+                if message is not None:
+                    return message
+
+
+@implements_to_string
+class TemplateNotFound(IOError, LookupError, TemplateError):
+    """Raised if a template does not exist.
+
+    .. versionchanged:: 2.11
+        If the given name is :class:`Undefined` and no message was
+        provided, an :exc:`UndefinedError` is raised.
+    """
+
+    # looks weird, but removes the warning descriptor that just
+    # bogusly warns us about message being deprecated
+    message = None
+
+    def __init__(self, name, message=None):
+        IOError.__init__(self, name)
+
+        if message is None:
+            from .runtime import Undefined
+
+            if isinstance(name, Undefined):
+                name._fail_with_undefined_error()
+
+            message = name
+
+        self.message = message
+        self.name = name
+        self.templates = [name]
+
+    def __str__(self):
+        return self.message
+
+
+class TemplatesNotFound(TemplateNotFound):
+    """Like :class:`TemplateNotFound` but raised if multiple templates
+    are selected.  This is a subclass of :class:`TemplateNotFound`
+    exception, so just catching the base exception will catch both.
+
+    .. versionchanged:: 2.11
+        If a name in the list of names is :class:`Undefined`, a message
+        about it being undefined is shown rather than the empty string.
+
+    .. versionadded:: 2.2
+    """
+
+    def __init__(self, names=(), message=None):
+        if message is None:
+            from .runtime import Undefined
+
+            parts = []
+
+            for name in names:
+                if isinstance(name, Undefined):
+                    parts.append(name._undefined_message)
+                else:
+                    parts.append(name)
+
+            message = u"none of the templates given were found: " + u", ".join(
+                imap(text_type, parts)
+            )
+        TemplateNotFound.__init__(self, names and names[-1] or None, message)
+        self.templates = list(names)
+
+
+@implements_to_string
+class TemplateSyntaxError(TemplateError):
+    """Raised to tell the user that there is a problem with the template."""
+
+    def __init__(self, message, lineno, name=None, filename=None):
+        TemplateError.__init__(self, message)
+        self.lineno = lineno
+        self.name = name
+        self.filename = filename
+        self.source = None
+
+        # this is set to True if the debug.translate_syntax_error
+        # function translated the syntax error into a new traceback
+        self.translated = False
+
+    def __str__(self):
+        # for translated errors we only return the message
+        if self.translated:
+            return self.message
+
+        # otherwise attach some stuff
+        location = "line %d" % self.lineno
+        name = self.filename or self.name
+        if name:
+            location = 'File "%s", %s' % (name, location)
+        lines = [self.message, "  " + location]
+
+        # if the source is set, add the line to the output
+        if self.source is not None:
+            try:
+                line = self.source.splitlines()[self.lineno - 1]
+            except IndexError:
+                line = None
+            if line:
+                lines.append("    " + line.strip())
+
+        return u"\n".join(lines)
+
+    def __reduce__(self):
+        # https://bugs.python.org/issue1692335 Exceptions that take
+        # multiple required arguments have problems with pickling.
+        # Without this, raises TypeError: __init__() missing 1 required
+        # positional argument: 'lineno'
+        return self.__class__, (self.message, self.lineno, self.name, self.filename)
+
+
+class TemplateAssertionError(TemplateSyntaxError):
+    """Like a template syntax error, but covers cases where something in the
+    template caused an error at compile time that wasn't necessarily caused
+    by a syntax error.  However it's a direct subclass of
+    :exc:`TemplateSyntaxError` and has the same attributes.
+    """
+
+
+class TemplateRuntimeError(TemplateError):
+    """A generic runtime error in the template engine.  Under some situations
+    Jinja may raise this exception.
+    """
+
+
+class UndefinedError(TemplateRuntimeError):
+    """Raised if a template tries to operate on :class:`Undefined`."""
+
+
+class SecurityError(TemplateRuntimeError):
+    """Raised if a template tries to do something insecure if the
+    sandbox is enabled.
+    """
+
+
+class FilterArgumentError(TemplateRuntimeError):
+    """This error is raised if a filter was called with inappropriate
+    arguments
+    """
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/ext.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/ext.py
new file mode 100644
index 0000000..9141be4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/ext.py
@@ -0,0 +1,704 @@
+# -*- coding: utf-8 -*-
+"""Extension API for adding custom tags and behavior."""
+import pprint
+import re
+from sys import version_info
+
+from markupsafe import Markup
+
+from . import nodes
+from ._compat import iteritems
+from ._compat import string_types
+from ._compat import with_metaclass
+from .defaults import BLOCK_END_STRING
+from .defaults import BLOCK_START_STRING
+from .defaults import COMMENT_END_STRING
+from .defaults import COMMENT_START_STRING
+from .defaults import KEEP_TRAILING_NEWLINE
+from .defaults import LINE_COMMENT_PREFIX
+from .defaults import LINE_STATEMENT_PREFIX
+from .defaults import LSTRIP_BLOCKS
+from .defaults import NEWLINE_SEQUENCE
+from .defaults import TRIM_BLOCKS
+from .defaults import VARIABLE_END_STRING
+from .defaults import VARIABLE_START_STRING
+from .environment import Environment
+from .exceptions import TemplateAssertionError
+from .exceptions import TemplateSyntaxError
+from .nodes import ContextReference
+from .runtime import concat
+from .utils import contextfunction
+from .utils import import_string
+
+# the only real useful gettext functions for a Jinja template.  Note
+# that ugettext must be assigned to gettext as Jinja doesn't support
+# non unicode strings.
+GETTEXT_FUNCTIONS = ("_", "gettext", "ngettext")
+
+_ws_re = re.compile(r"\s*\n\s*")
+
+
+class ExtensionRegistry(type):
+    """Gives the extension an unique identifier."""
+
+    def __new__(mcs, name, bases, d):
+        rv = type.__new__(mcs, name, bases, d)
+        rv.identifier = rv.__module__ + "." + rv.__name__
+        return rv
+
+
+class Extension(with_metaclass(ExtensionRegistry, object)):
+    """Extensions can be used to add extra functionality to the Jinja template
+    system at the parser level.  Custom extensions are bound to an environment
+    but may not store environment specific data on `self`.  The reason for
+    this is that an extension can be bound to another environment (for
+    overlays) by creating a copy and reassigning the `environment` attribute.
+
+    As extensions are created by the environment they cannot accept any
+    arguments for configuration.  One may want to work around that by using
+    a factory function, but that is not possible as extensions are identified
+    by their import name.  The correct way to configure the extension is
+    storing the configuration values on the environment.  Because this way the
+    environment ends up acting as central configuration storage the
+    attributes may clash which is why extensions have to ensure that the names
+    they choose for configuration are not too generic.  ``prefix`` for example
+    is a terrible name, ``fragment_cache_prefix`` on the other hand is a good
+    name as includes the name of the extension (fragment cache).
+    """
+
+    #: if this extension parses this is the list of tags it's listening to.
+    tags = set()
+
+    #: the priority of that extension.  This is especially useful for
+    #: extensions that preprocess values.  A lower value means higher
+    #: priority.
+    #:
+    #: .. versionadded:: 2.4
+    priority = 100
+
+    def __init__(self, environment):
+        self.environment = environment
+
+    def bind(self, environment):
+        """Create a copy of this extension bound to another environment."""
+        rv = object.__new__(self.__class__)
+        rv.__dict__.update(self.__dict__)
+        rv.environment = environment
+        return rv
+
+    def preprocess(self, source, name, filename=None):
+        """This method is called before the actual lexing and can be used to
+        preprocess the source.  The `filename` is optional.  The return value
+        must be the preprocessed source.
+        """
+        return source
+
+    def filter_stream(self, stream):
+        """It's passed a :class:`~jinja2.lexer.TokenStream` that can be used
+        to filter tokens returned.  This method has to return an iterable of
+        :class:`~jinja2.lexer.Token`\\s, but it doesn't have to return a
+        :class:`~jinja2.lexer.TokenStream`.
+        """
+        return stream
+
+    def parse(self, parser):
+        """If any of the :attr:`tags` matched this method is called with the
+        parser as first argument.  The token the parser stream is pointing at
+        is the name token that matched.  This method has to return one or a
+        list of multiple nodes.
+        """
+        raise NotImplementedError()
+
+    def attr(self, name, lineno=None):
+        """Return an attribute node for the current extension.  This is useful
+        to pass constants on extensions to generated template code.
+
+        ::
+
+            self.attr('_my_attribute', lineno=lineno)
+        """
+        return nodes.ExtensionAttribute(self.identifier, name, lineno=lineno)
+
+    def call_method(
+        self, name, args=None, kwargs=None, dyn_args=None, dyn_kwargs=None, lineno=None
+    ):
+        """Call a method of the extension.  This is a shortcut for
+        :meth:`attr` + :class:`jinja2.nodes.Call`.
+        """
+        if args is None:
+            args = []
+        if kwargs is None:
+            kwargs = []
+        return nodes.Call(
+            self.attr(name, lineno=lineno),
+            args,
+            kwargs,
+            dyn_args,
+            dyn_kwargs,
+            lineno=lineno,
+        )
+
+
+@contextfunction
+def _gettext_alias(__context, *args, **kwargs):
+    return __context.call(__context.resolve("gettext"), *args, **kwargs)
+
+
+def _make_new_gettext(func):
+    @contextfunction
+    def gettext(__context, __string, **variables):
+        rv = __context.call(func, __string)
+        if __context.eval_ctx.autoescape:
+            rv = Markup(rv)
+        # Always treat as a format string, even if there are no
+        # variables. This makes translation strings more consistent
+        # and predictable. This requires escaping
+        return rv % variables
+
+    return gettext
+
+
+def _make_new_ngettext(func):
+    @contextfunction
+    def ngettext(__context, __singular, __plural, __num, **variables):
+        variables.setdefault("num", __num)
+        rv = __context.call(func, __singular, __plural, __num)
+        if __context.eval_ctx.autoescape:
+            rv = Markup(rv)
+        # Always treat as a format string, see gettext comment above.
+        return rv % variables
+
+    return ngettext
+
+
+class InternationalizationExtension(Extension):
+    """This extension adds gettext support to Jinja."""
+
+    tags = {"trans"}
+
+    # TODO: the i18n extension is currently reevaluating values in a few
+    # situations.  Take this example:
+    #   {% trans count=something() %}{{ count }} foo{% pluralize
+    #     %}{{ count }} fooss{% endtrans %}
+    # something is called twice here.  One time for the gettext value and
+    # the other time for the n-parameter of the ngettext function.
+
+    def __init__(self, environment):
+        Extension.__init__(self, environment)
+        environment.globals["_"] = _gettext_alias
+        environment.extend(
+            install_gettext_translations=self._install,
+            install_null_translations=self._install_null,
+            install_gettext_callables=self._install_callables,
+            uninstall_gettext_translations=self._uninstall,
+            extract_translations=self._extract,
+            newstyle_gettext=False,
+        )
+
+    def _install(self, translations, newstyle=None):
+        gettext = getattr(translations, "ugettext", None)
+        if gettext is None:
+            gettext = translations.gettext
+        ngettext = getattr(translations, "ungettext", None)
+        if ngettext is None:
+            ngettext = translations.ngettext
+        self._install_callables(gettext, ngettext, newstyle)
+
+    def _install_null(self, newstyle=None):
+        self._install_callables(
+            lambda x: x, lambda s, p, n: (n != 1 and (p,) or (s,))[0], newstyle
+        )
+
+    def _install_callables(self, gettext, ngettext, newstyle=None):
+        if newstyle is not None:
+            self.environment.newstyle_gettext = newstyle
+        if self.environment.newstyle_gettext:
+            gettext = _make_new_gettext(gettext)
+            ngettext = _make_new_ngettext(ngettext)
+        self.environment.globals.update(gettext=gettext, ngettext=ngettext)
+
+    def _uninstall(self, translations):
+        for key in "gettext", "ngettext":
+            self.environment.globals.pop(key, None)
+
+    def _extract(self, source, gettext_functions=GETTEXT_FUNCTIONS):
+        if isinstance(source, string_types):
+            source = self.environment.parse(source)
+        return extract_from_ast(source, gettext_functions)
+
+    def parse(self, parser):
+        """Parse a translatable tag."""
+        lineno = next(parser.stream).lineno
+        num_called_num = False
+
+        # find all the variables referenced.  Additionally a variable can be
+        # defined in the body of the trans block too, but this is checked at
+        # a later state.
+        plural_expr = None
+        plural_expr_assignment = None
+        variables = {}
+        trimmed = None
+        while parser.stream.current.type != "block_end":
+            if variables:
+                parser.stream.expect("comma")
+
+            # skip colon for python compatibility
+            if parser.stream.skip_if("colon"):
+                break
+
+            name = parser.stream.expect("name")
+            if name.value in variables:
+                parser.fail(
+                    "translatable variable %r defined twice." % name.value,
+                    name.lineno,
+                    exc=TemplateAssertionError,
+                )
+
+            # expressions
+            if parser.stream.current.type == "assign":
+                next(parser.stream)
+                variables[name.value] = var = parser.parse_expression()
+            elif trimmed is None and name.value in ("trimmed", "notrimmed"):
+                trimmed = name.value == "trimmed"
+                continue
+            else:
+                variables[name.value] = var = nodes.Name(name.value, "load")
+
+            if plural_expr is None:
+                if isinstance(var, nodes.Call):
+                    plural_expr = nodes.Name("_trans", "load")
+                    variables[name.value] = plural_expr
+                    plural_expr_assignment = nodes.Assign(
+                        nodes.Name("_trans", "store"), var
+                    )
+                else:
+                    plural_expr = var
+                num_called_num = name.value == "num"
+
+        parser.stream.expect("block_end")
+
+        plural = None
+        have_plural = False
+        referenced = set()
+
+        # now parse until endtrans or pluralize
+        singular_names, singular = self._parse_block(parser, True)
+        if singular_names:
+            referenced.update(singular_names)
+            if plural_expr is None:
+                plural_expr = nodes.Name(singular_names[0], "load")
+                num_called_num = singular_names[0] == "num"
+
+        # if we have a pluralize block, we parse that too
+        if parser.stream.current.test("name:pluralize"):
+            have_plural = True
+            next(parser.stream)
+            if parser.stream.current.type != "block_end":
+                name = parser.stream.expect("name")
+                if name.value not in variables:
+                    parser.fail(
+                        "unknown variable %r for pluralization" % name.value,
+                        name.lineno,
+                        exc=TemplateAssertionError,
+                    )
+                plural_expr = variables[name.value]
+                num_called_num = name.value == "num"
+            parser.stream.expect("block_end")
+            plural_names, plural = self._parse_block(parser, False)
+            next(parser.stream)
+            referenced.update(plural_names)
+        else:
+            next(parser.stream)
+
+        # register free names as simple name expressions
+        for var in referenced:
+            if var not in variables:
+                variables[var] = nodes.Name(var, "load")
+
+        if not have_plural:
+            plural_expr = None
+        elif plural_expr is None:
+            parser.fail("pluralize without variables", lineno)
+
+        if trimmed is None:
+            trimmed = self.environment.policies["ext.i18n.trimmed"]
+        if trimmed:
+            singular = self._trim_whitespace(singular)
+            if plural:
+                plural = self._trim_whitespace(plural)
+
+        node = self._make_node(
+            singular,
+            plural,
+            variables,
+            plural_expr,
+            bool(referenced),
+            num_called_num and have_plural,
+        )
+        node.set_lineno(lineno)
+        if plural_expr_assignment is not None:
+            return [plural_expr_assignment, node]
+        else:
+            return node
+
+    def _trim_whitespace(self, string, _ws_re=_ws_re):
+        return _ws_re.sub(" ", string.strip())
+
+    def _parse_block(self, parser, allow_pluralize):
+        """Parse until the next block tag with a given name."""
+        referenced = []
+        buf = []
+        while 1:
+            if parser.stream.current.type == "data":
+                buf.append(parser.stream.current.value.replace("%", "%%"))
+                next(parser.stream)
+            elif parser.stream.current.type == "variable_begin":
+                next(parser.stream)
+                name = parser.stream.expect("name").value
+                referenced.append(name)
+                buf.append("%%(%s)s" % name)
+                parser.stream.expect("variable_end")
+            elif parser.stream.current.type == "block_begin":
+                next(parser.stream)
+                if parser.stream.current.test("name:endtrans"):
+                    break
+                elif parser.stream.current.test("name:pluralize"):
+                    if allow_pluralize:
+                        break
+                    parser.fail(
+                        "a translatable section can have only one pluralize section"
+                    )
+                parser.fail(
+                    "control structures in translatable sections are not allowed"
+                )
+            elif parser.stream.eos:
+                parser.fail("unclosed translation block")
+            else:
+                raise RuntimeError("internal parser error")
+
+        return referenced, concat(buf)
+
+    def _make_node(
+        self, singular, plural, variables, plural_expr, vars_referenced, num_called_num
+    ):
+        """Generates a useful node from the data provided."""
+        # no variables referenced?  no need to escape for old style
+        # gettext invocations only if there are vars.
+        if not vars_referenced and not self.environment.newstyle_gettext:
+            singular = singular.replace("%%", "%")
+            if plural:
+                plural = plural.replace("%%", "%")
+
+        # singular only:
+        if plural_expr is None:
+            gettext = nodes.Name("gettext", "load")
+            node = nodes.Call(gettext, [nodes.Const(singular)], [], None, None)
+
+        # singular and plural
+        else:
+            ngettext = nodes.Name("ngettext", "load")
+            node = nodes.Call(
+                ngettext,
+                [nodes.Const(singular), nodes.Const(plural), plural_expr],
+                [],
+                None,
+                None,
+            )
+
+        # in case newstyle gettext is used, the method is powerful
+        # enough to handle the variable expansion and autoescape
+        # handling itself
+        if self.environment.newstyle_gettext:
+            for key, value in iteritems(variables):
+                # the function adds that later anyways in case num was
+                # called num, so just skip it.
+                if num_called_num and key == "num":
+                    continue
+                node.kwargs.append(nodes.Keyword(key, value))
+
+        # otherwise do that here
+        else:
+            # mark the return value as safe if we are in an
+            # environment with autoescaping turned on
+            node = nodes.MarkSafeIfAutoescape(node)
+            if variables:
+                node = nodes.Mod(
+                    node,
+                    nodes.Dict(
+                        [
+                            nodes.Pair(nodes.Const(key), value)
+                            for key, value in variables.items()
+                        ]
+                    ),
+                )
+        return nodes.Output([node])
+
+
+class ExprStmtExtension(Extension):
+    """Adds a `do` tag to Jinja that works like the print statement just
+    that it doesn't print the return value.
+    """
+
+    tags = set(["do"])
+
+    def parse(self, parser):
+        node = nodes.ExprStmt(lineno=next(parser.stream).lineno)
+        node.node = parser.parse_tuple()
+        return node
+
+
+class LoopControlExtension(Extension):
+    """Adds break and continue to the template engine."""
+
+    tags = set(["break", "continue"])
+
+    def parse(self, parser):
+        token = next(parser.stream)
+        if token.value == "break":
+            return nodes.Break(lineno=token.lineno)
+        return nodes.Continue(lineno=token.lineno)
+
+
+class WithExtension(Extension):
+    pass
+
+
+class AutoEscapeExtension(Extension):
+    pass
+
+
+class DebugExtension(Extension):
+    """A ``{% debug %}`` tag that dumps the available variables,
+    filters, and tests.
+
+    .. code-block:: html+jinja
+
+        <pre>{% debug %}</pre>
+
+    .. code-block:: text
+
+        {'context': {'cycler': <class 'jinja2.utils.Cycler'>,
+                     ...,
+                     'namespace': <class 'jinja2.utils.Namespace'>},
+         'filters': ['abs', 'attr', 'batch', 'capitalize', 'center', 'count', 'd',
+                     ..., 'urlencode', 'urlize', 'wordcount', 'wordwrap', 'xmlattr'],
+         'tests': ['!=', '<', '<=', '==', '>', '>=', 'callable', 'defined',
+                   ..., 'odd', 'sameas', 'sequence', 'string', 'undefined', 'upper']}
+
+    .. versionadded:: 2.11.0
+    """
+
+    tags = {"debug"}
+
+    def parse(self, parser):
+        lineno = parser.stream.expect("name:debug").lineno
+        context = ContextReference()
+        result = self.call_method("_render", [context], lineno=lineno)
+        return nodes.Output([result], lineno=lineno)
+
+    def _render(self, context):
+        result = {
+            "context": context.get_all(),
+            "filters": sorted(self.environment.filters.keys()),
+            "tests": sorted(self.environment.tests.keys()),
+        }
+
+        # Set the depth since the intent is to show the top few names.
+        if version_info[:2] >= (3, 4):
+            return pprint.pformat(result, depth=3, compact=True)
+        else:
+            return pprint.pformat(result, depth=3)
+
+
+def extract_from_ast(node, gettext_functions=GETTEXT_FUNCTIONS, babel_style=True):
+    """Extract localizable strings from the given template node.  Per
+    default this function returns matches in babel style that means non string
+    parameters as well as keyword arguments are returned as `None`.  This
+    allows Babel to figure out what you really meant if you are using
+    gettext functions that allow keyword arguments for placeholder expansion.
+    If you don't want that behavior set the `babel_style` parameter to `False`
+    which causes only strings to be returned and parameters are always stored
+    in tuples.  As a consequence invalid gettext calls (calls without a single
+    string parameter or string parameters after non-string parameters) are
+    skipped.
+
+    This example explains the behavior:
+
+    >>> from jinja2 import Environment
+    >>> env = Environment()
+    >>> node = env.parse('{{ (_("foo"), _(), ngettext("foo", "bar", 42)) }}')
+    >>> list(extract_from_ast(node))
+    [(1, '_', 'foo'), (1, '_', ()), (1, 'ngettext', ('foo', 'bar', None))]
+    >>> list(extract_from_ast(node, babel_style=False))
+    [(1, '_', ('foo',)), (1, 'ngettext', ('foo', 'bar'))]
+
+    For every string found this function yields a ``(lineno, function,
+    message)`` tuple, where:
+
+    * ``lineno`` is the number of the line on which the string was found,
+    * ``function`` is the name of the ``gettext`` function used (if the
+      string was extracted from embedded Python code), and
+    *  ``message`` is the string itself (a ``unicode`` object, or a tuple
+       of ``unicode`` objects for functions with multiple string arguments).
+
+    This extraction function operates on the AST and is because of that unable
+    to extract any comments.  For comment support you have to use the babel
+    extraction interface or extract comments yourself.
+    """
+    for node in node.find_all(nodes.Call):
+        if (
+            not isinstance(node.node, nodes.Name)
+            or node.node.name not in gettext_functions
+        ):
+            continue
+
+        strings = []
+        for arg in node.args:
+            if isinstance(arg, nodes.Const) and isinstance(arg.value, string_types):
+                strings.append(arg.value)
+            else:
+                strings.append(None)
+
+        for _ in node.kwargs:
+            strings.append(None)
+        if node.dyn_args is not None:
+            strings.append(None)
+        if node.dyn_kwargs is not None:
+            strings.append(None)
+
+        if not babel_style:
+            strings = tuple(x for x in strings if x is not None)
+            if not strings:
+                continue
+        else:
+            if len(strings) == 1:
+                strings = strings[0]
+            else:
+                strings = tuple(strings)
+        yield node.lineno, node.node.name, strings
+
+
+class _CommentFinder(object):
+    """Helper class to find comments in a token stream.  Can only
+    find comments for gettext calls forwards.  Once the comment
+    from line 4 is found, a comment for line 1 will not return a
+    usable value.
+    """
+
+    def __init__(self, tokens, comment_tags):
+        self.tokens = tokens
+        self.comment_tags = comment_tags
+        self.offset = 0
+        self.last_lineno = 0
+
+    def find_backwards(self, offset):
+        try:
+            for _, token_type, token_value in reversed(
+                self.tokens[self.offset : offset]
+            ):
+                if token_type in ("comment", "linecomment"):
+                    try:
+                        prefix, comment = token_value.split(None, 1)
+                    except ValueError:
+                        continue
+                    if prefix in self.comment_tags:
+                        return [comment.rstrip()]
+            return []
+        finally:
+            self.offset = offset
+
+    def find_comments(self, lineno):
+        if not self.comment_tags or self.last_lineno > lineno:
+            return []
+        for idx, (token_lineno, _, _) in enumerate(self.tokens[self.offset :]):
+            if token_lineno > lineno:
+                return self.find_backwards(self.offset + idx)
+        return self.find_backwards(len(self.tokens))
+
+
+def babel_extract(fileobj, keywords, comment_tags, options):
+    """Babel extraction method for Jinja templates.
+
+    .. versionchanged:: 2.3
+       Basic support for translation comments was added.  If `comment_tags`
+       is now set to a list of keywords for extraction, the extractor will
+       try to find the best preceding comment that begins with one of the
+       keywords.  For best results, make sure to not have more than one
+       gettext call in one line of code and the matching comment in the
+       same line or the line before.
+
+    .. versionchanged:: 2.5.1
+       The `newstyle_gettext` flag can be set to `True` to enable newstyle
+       gettext calls.
+
+    .. versionchanged:: 2.7
+       A `silent` option can now be provided.  If set to `False` template
+       syntax errors are propagated instead of being ignored.
+
+    :param fileobj: the file-like object the messages should be extracted from
+    :param keywords: a list of keywords (i.e. function names) that should be
+                     recognized as translation functions
+    :param comment_tags: a list of translator tags to search for and include
+                         in the results.
+    :param options: a dictionary of additional options (optional)
+    :return: an iterator over ``(lineno, funcname, message, comments)`` tuples.
+             (comments will be empty currently)
+    """
+    extensions = set()
+    for extension in options.get("extensions", "").split(","):
+        extension = extension.strip()
+        if not extension:
+            continue
+        extensions.add(import_string(extension))
+    if InternationalizationExtension not in extensions:
+        extensions.add(InternationalizationExtension)
+
+    def getbool(options, key, default=False):
+        return options.get(key, str(default)).lower() in ("1", "on", "yes", "true")
+
+    silent = getbool(options, "silent", True)
+    environment = Environment(
+        options.get("block_start_string", BLOCK_START_STRING),
+        options.get("block_end_string", BLOCK_END_STRING),
+        options.get("variable_start_string", VARIABLE_START_STRING),
+        options.get("variable_end_string", VARIABLE_END_STRING),
+        options.get("comment_start_string", COMMENT_START_STRING),
+        options.get("comment_end_string", COMMENT_END_STRING),
+        options.get("line_statement_prefix") or LINE_STATEMENT_PREFIX,
+        options.get("line_comment_prefix") or LINE_COMMENT_PREFIX,
+        getbool(options, "trim_blocks", TRIM_BLOCKS),
+        getbool(options, "lstrip_blocks", LSTRIP_BLOCKS),
+        NEWLINE_SEQUENCE,
+        getbool(options, "keep_trailing_newline", KEEP_TRAILING_NEWLINE),
+        frozenset(extensions),
+        cache_size=0,
+        auto_reload=False,
+    )
+
+    if getbool(options, "trimmed"):
+        environment.policies["ext.i18n.trimmed"] = True
+    if getbool(options, "newstyle_gettext"):
+        environment.newstyle_gettext = True
+
+    source = fileobj.read().decode(options.get("encoding", "utf-8"))
+    try:
+        node = environment.parse(source)
+        tokens = list(environment.lex(environment.preprocess(source)))
+    except TemplateSyntaxError:
+        if not silent:
+            raise
+        # skip templates with syntax errors
+        return
+
+    finder = _CommentFinder(tokens, comment_tags)
+    for lineno, func, message in extract_from_ast(node, keywords):
+        yield lineno, func, message, finder.find_comments(lineno)
+
+
+#: nicer import names
+i18n = InternationalizationExtension
+do = ExprStmtExtension
+loopcontrols = LoopControlExtension
+with_ = WithExtension
+autoescape = AutoEscapeExtension
+debug = DebugExtension
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/filters.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/filters.py
new file mode 100644
index 0000000..9741567
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/filters.py
@@ -0,0 +1,1382 @@
+# -*- coding: utf-8 -*-
+"""Built-in template filters used with the ``|`` operator."""
+import math
+import random
+import re
+import warnings
+from collections import namedtuple
+from itertools import chain
+from itertools import groupby
+
+from markupsafe import escape
+from markupsafe import Markup
+from markupsafe import soft_unicode
+
+from ._compat import abc
+from ._compat import imap
+from ._compat import iteritems
+from ._compat import string_types
+from ._compat import text_type
+from .exceptions import FilterArgumentError
+from .runtime import Undefined
+from .utils import htmlsafe_json_dumps
+from .utils import pformat
+from .utils import unicode_urlencode
+from .utils import urlize
+
+_word_re = re.compile(r"\w+", re.UNICODE)
+_word_beginning_split_re = re.compile(r"([-\s\(\{\[\<]+)", re.UNICODE)
+
+
+def contextfilter(f):
+    """Decorator for marking context dependent filters. The current
+    :class:`Context` will be passed as first argument.
+    """
+    f.contextfilter = True
+    return f
+
+
+def evalcontextfilter(f):
+    """Decorator for marking eval-context dependent filters.  An eval
+    context object is passed as first argument.  For more information
+    about the eval context, see :ref:`eval-context`.
+
+    .. versionadded:: 2.4
+    """
+    f.evalcontextfilter = True
+    return f
+
+
+def environmentfilter(f):
+    """Decorator for marking environment dependent filters.  The current
+    :class:`Environment` is passed to the filter as first argument.
+    """
+    f.environmentfilter = True
+    return f
+
+
+def ignore_case(value):
+    """For use as a postprocessor for :func:`make_attrgetter`. Converts strings
+    to lowercase and returns other types as-is."""
+    return value.lower() if isinstance(value, string_types) else value
+
+
+def make_attrgetter(environment, attribute, postprocess=None, default=None):
+    """Returns a callable that looks up the given attribute from a
+    passed object with the rules of the environment.  Dots are allowed
+    to access attributes of attributes.  Integer parts in paths are
+    looked up as integers.
+    """
+    attribute = _prepare_attribute_parts(attribute)
+
+    def attrgetter(item):
+        for part in attribute:
+            item = environment.getitem(item, part)
+
+            if default and isinstance(item, Undefined):
+                item = default
+
+        if postprocess is not None:
+            item = postprocess(item)
+
+        return item
+
+    return attrgetter
+
+
+def make_multi_attrgetter(environment, attribute, postprocess=None):
+    """Returns a callable that looks up the given comma separated
+    attributes from a passed object with the rules of the environment.
+    Dots are allowed to access attributes of each attribute.  Integer
+    parts in paths are looked up as integers.
+
+    The value returned by the returned callable is a list of extracted
+    attribute values.
+
+    Examples of attribute: "attr1,attr2", "attr1.inner1.0,attr2.inner2.0", etc.
+    """
+    attribute_parts = (
+        attribute.split(",") if isinstance(attribute, string_types) else [attribute]
+    )
+    attribute = [
+        _prepare_attribute_parts(attribute_part) for attribute_part in attribute_parts
+    ]
+
+    def attrgetter(item):
+        items = [None] * len(attribute)
+        for i, attribute_part in enumerate(attribute):
+            item_i = item
+            for part in attribute_part:
+                item_i = environment.getitem(item_i, part)
+
+            if postprocess is not None:
+                item_i = postprocess(item_i)
+
+            items[i] = item_i
+        return items
+
+    return attrgetter
+
+
+def _prepare_attribute_parts(attr):
+    if attr is None:
+        return []
+    elif isinstance(attr, string_types):
+        return [int(x) if x.isdigit() else x for x in attr.split(".")]
+    else:
+        return [attr]
+
+
+def do_forceescape(value):
+    """Enforce HTML escaping.  This will probably double escape variables."""
+    if hasattr(value, "__html__"):
+        value = value.__html__()
+    return escape(text_type(value))
+
+
+def do_urlencode(value):
+    """Quote data for use in a URL path or query using UTF-8.
+
+    Basic wrapper around :func:`urllib.parse.quote` when given a
+    string, or :func:`urllib.parse.urlencode` for a dict or iterable.
+
+    :param value: Data to quote. A string will be quoted directly. A
+        dict or iterable of ``(key, value)`` pairs will be joined as a
+        query string.
+
+    When given a string, "/" is not quoted. HTTP servers treat "/" and
+    "%2F" equivalently in paths. If you need quoted slashes, use the
+    ``|replace("/", "%2F")`` filter.
+
+    .. versionadded:: 2.7
+    """
+    if isinstance(value, string_types) or not isinstance(value, abc.Iterable):
+        return unicode_urlencode(value)
+
+    if isinstance(value, dict):
+        items = iteritems(value)
+    else:
+        items = iter(value)
+
+    return u"&".join(
+        "%s=%s" % (unicode_urlencode(k, for_qs=True), unicode_urlencode(v, for_qs=True))
+        for k, v in items
+    )
+
+
+@evalcontextfilter
+def do_replace(eval_ctx, s, old, new, count=None):
+    """Return a copy of the value with all occurrences of a substring
+    replaced with a new one. The first argument is the substring
+    that should be replaced, the second is the replacement string.
+    If the optional third argument ``count`` is given, only the first
+    ``count`` occurrences are replaced:
+
+    .. sourcecode:: jinja
+
+        {{ "Hello World"|replace("Hello", "Goodbye") }}
+            -> Goodbye World
+
+        {{ "aaaaargh"|replace("a", "d'oh, ", 2) }}
+            -> d'oh, d'oh, aaargh
+    """
+    if count is None:
+        count = -1
+    if not eval_ctx.autoescape:
+        return text_type(s).replace(text_type(old), text_type(new), count)
+    if (
+        hasattr(old, "__html__")
+        or hasattr(new, "__html__")
+        and not hasattr(s, "__html__")
+    ):
+        s = escape(s)
+    else:
+        s = soft_unicode(s)
+    return s.replace(soft_unicode(old), soft_unicode(new), count)
+
+
+def do_upper(s):
+    """Convert a value to uppercase."""
+    return soft_unicode(s).upper()
+
+
+def do_lower(s):
+    """Convert a value to lowercase."""
+    return soft_unicode(s).lower()
+
+
+@evalcontextfilter
+def do_xmlattr(_eval_ctx, d, autospace=True):
+    """Create an SGML/XML attribute string based on the items in a dict.
+    All values that are neither `none` nor `undefined` are automatically
+    escaped:
+
+    .. sourcecode:: html+jinja
+
+        <ul{{ {'class': 'my_list', 'missing': none,
+                'id': 'list-%d'|format(variable)}|xmlattr }}>
+        ...
+        </ul>
+
+    Results in something like this:
+
+    .. sourcecode:: html
+
+        <ul class="my_list" id="list-42">
+        ...
+        </ul>
+
+    As you can see it automatically prepends a space in front of the item
+    if the filter returned something unless the second parameter is false.
+    """
+    rv = u" ".join(
+        u'%s="%s"' % (escape(key), escape(value))
+        for key, value in iteritems(d)
+        if value is not None and not isinstance(value, Undefined)
+    )
+    if autospace and rv:
+        rv = u" " + rv
+    if _eval_ctx.autoescape:
+        rv = Markup(rv)
+    return rv
+
+
+def do_capitalize(s):
+    """Capitalize a value. The first character will be uppercase, all others
+    lowercase.
+    """
+    return soft_unicode(s).capitalize()
+
+
+def do_title(s):
+    """Return a titlecased version of the value. I.e. words will start with
+    uppercase letters, all remaining characters are lowercase.
+    """
+    return "".join(
+        [
+            item[0].upper() + item[1:].lower()
+            for item in _word_beginning_split_re.split(soft_unicode(s))
+            if item
+        ]
+    )
+
+
+def do_dictsort(value, case_sensitive=False, by="key", reverse=False):
+    """Sort a dict and yield (key, value) pairs. Because python dicts are
+    unsorted you may want to use this function to order them by either
+    key or value:
+
+    .. sourcecode:: jinja
+
+        {% for item in mydict|dictsort %}
+            sort the dict by key, case insensitive
+
+        {% for item in mydict|dictsort(reverse=true) %}
+            sort the dict by key, case insensitive, reverse order
+
+        {% for item in mydict|dictsort(true) %}
+            sort the dict by key, case sensitive
+
+        {% for item in mydict|dictsort(false, 'value') %}
+            sort the dict by value, case insensitive
+    """
+    if by == "key":
+        pos = 0
+    elif by == "value":
+        pos = 1
+    else:
+        raise FilterArgumentError('You can only sort by either "key" or "value"')
+
+    def sort_func(item):
+        value = item[pos]
+
+        if not case_sensitive:
+            value = ignore_case(value)
+
+        return value
+
+    return sorted(value.items(), key=sort_func, reverse=reverse)
+
+
+@environmentfilter
+def do_sort(environment, value, reverse=False, case_sensitive=False, attribute=None):
+    """Sort an iterable using Python's :func:`sorted`.
+
+    .. sourcecode:: jinja
+
+        {% for city in cities|sort %}
+            ...
+        {% endfor %}
+
+    :param reverse: Sort descending instead of ascending.
+    :param case_sensitive: When sorting strings, sort upper and lower
+        case separately.
+    :param attribute: When sorting objects or dicts, an attribute or
+        key to sort by. Can use dot notation like ``"address.city"``.
+        Can be a list of attributes like ``"age,name"``.
+
+    The sort is stable, it does not change the relative order of
+    elements that compare equal. This makes it is possible to chain
+    sorts on different attributes and ordering.
+
+    .. sourcecode:: jinja
+
+        {% for user in users|sort(attribute="name")
+            |sort(reverse=true, attribute="age") %}
+            ...
+        {% endfor %}
+
+    As a shortcut to chaining when the direction is the same for all
+    attributes, pass a comma separate list of attributes.
+
+    .. sourcecode:: jinja
+
+        {% for user users|sort(attribute="age,name") %}
+            ...
+        {% endfor %}
+
+    .. versionchanged:: 2.11.0
+        The ``attribute`` parameter can be a comma separated list of
+        attributes, e.g. ``"age,name"``.
+
+    .. versionchanged:: 2.6
+       The ``attribute`` parameter was added.
+    """
+    key_func = make_multi_attrgetter(
+        environment, attribute, postprocess=ignore_case if not case_sensitive else None
+    )
+    return sorted(value, key=key_func, reverse=reverse)
+
+
+@environmentfilter
+def do_unique(environment, value, case_sensitive=False, attribute=None):
+    """Returns a list of unique items from the given iterable.
+
+    .. sourcecode:: jinja
+
+        {{ ['foo', 'bar', 'foobar', 'FooBar']|unique|list }}
+            -> ['foo', 'bar', 'foobar']
+
+    The unique items are yielded in the same order as their first occurrence in
+    the iterable passed to the filter.
+
+    :param case_sensitive: Treat upper and lower case strings as distinct.
+    :param attribute: Filter objects with unique values for this attribute.
+    """
+    getter = make_attrgetter(
+        environment, attribute, postprocess=ignore_case if not case_sensitive else None
+    )
+    seen = set()
+
+    for item in value:
+        key = getter(item)
+
+        if key not in seen:
+            seen.add(key)
+            yield item
+
+
+def _min_or_max(environment, value, func, case_sensitive, attribute):
+    it = iter(value)
+
+    try:
+        first = next(it)
+    except StopIteration:
+        return environment.undefined("No aggregated item, sequence was empty.")
+
+    key_func = make_attrgetter(
+        environment, attribute, postprocess=ignore_case if not case_sensitive else None
+    )
+    return func(chain([first], it), key=key_func)
+
+
+@environmentfilter
+def do_min(environment, value, case_sensitive=False, attribute=None):
+    """Return the smallest item from the sequence.
+
+    .. sourcecode:: jinja
+
+        {{ [1, 2, 3]|min }}
+            -> 1
+
+    :param case_sensitive: Treat upper and lower case strings as distinct.
+    :param attribute: Get the object with the min value of this attribute.
+    """
+    return _min_or_max(environment, value, min, case_sensitive, attribute)
+
+
+@environmentfilter
+def do_max(environment, value, case_sensitive=False, attribute=None):
+    """Return the largest item from the sequence.
+
+    .. sourcecode:: jinja
+
+        {{ [1, 2, 3]|max }}
+            -> 3
+
+    :param case_sensitive: Treat upper and lower case strings as distinct.
+    :param attribute: Get the object with the max value of this attribute.
+    """
+    return _min_or_max(environment, value, max, case_sensitive, attribute)
+
+
+def do_default(value, default_value=u"", boolean=False):
+    """If the value is undefined it will return the passed default value,
+    otherwise the value of the variable:
+
+    .. sourcecode:: jinja
+
+        {{ my_variable|default('my_variable is not defined') }}
+
+    This will output the value of ``my_variable`` if the variable was
+    defined, otherwise ``'my_variable is not defined'``. If you want
+    to use default with variables that evaluate to false you have to
+    set the second parameter to `true`:
+
+    .. sourcecode:: jinja
+
+        {{ ''|default('the string was empty', true) }}
+
+    .. versionchanged:: 2.11
+       It's now possible to configure the :class:`~jinja2.Environment` with
+       :class:`~jinja2.ChainableUndefined` to make the `default` filter work
+       on nested elements and attributes that may contain undefined values
+       in the chain without getting an :exc:`~jinja2.UndefinedError`.
+    """
+    if isinstance(value, Undefined) or (boolean and not value):
+        return default_value
+    return value
+
+
+@evalcontextfilter
+def do_join(eval_ctx, value, d=u"", attribute=None):
+    """Return a string which is the concatenation of the strings in the
+    sequence. The separator between elements is an empty string per
+    default, you can define it with the optional parameter:
+
+    .. sourcecode:: jinja
+
+        {{ [1, 2, 3]|join('|') }}
+            -> 1|2|3
+
+        {{ [1, 2, 3]|join }}
+            -> 123
+
+    It is also possible to join certain attributes of an object:
+
+    .. sourcecode:: jinja
+
+        {{ users|join(', ', attribute='username') }}
+
+    .. versionadded:: 2.6
+       The `attribute` parameter was added.
+    """
+    if attribute is not None:
+        value = imap(make_attrgetter(eval_ctx.environment, attribute), value)
+
+    # no automatic escaping?  joining is a lot easier then
+    if not eval_ctx.autoescape:
+        return text_type(d).join(imap(text_type, value))
+
+    # if the delimiter doesn't have an html representation we check
+    # if any of the items has.  If yes we do a coercion to Markup
+    if not hasattr(d, "__html__"):
+        value = list(value)
+        do_escape = False
+        for idx, item in enumerate(value):
+            if hasattr(item, "__html__"):
+                do_escape = True
+            else:
+                value[idx] = text_type(item)
+        if do_escape:
+            d = escape(d)
+        else:
+            d = text_type(d)
+        return d.join(value)
+
+    # no html involved, to normal joining
+    return soft_unicode(d).join(imap(soft_unicode, value))
+
+
+def do_center(value, width=80):
+    """Centers the value in a field of a given width."""
+    return text_type(value).center(width)
+
+
+@environmentfilter
+def do_first(environment, seq):
+    """Return the first item of a sequence."""
+    try:
+        return next(iter(seq))
+    except StopIteration:
+        return environment.undefined("No first item, sequence was empty.")
+
+
+@environmentfilter
+def do_last(environment, seq):
+    """
+    Return the last item of a sequence.
+
+    Note: Does not work with generators. You may want to explicitly
+    convert it to a list:
+
+    .. sourcecode:: jinja
+
+        {{ data | selectattr('name', '==', 'Jinja') | list | last }}
+    """
+    try:
+        return next(iter(reversed(seq)))
+    except StopIteration:
+        return environment.undefined("No last item, sequence was empty.")
+
+
+@contextfilter
+def do_random(context, seq):
+    """Return a random item from the sequence."""
+    try:
+        return random.choice(seq)
+    except IndexError:
+        return context.environment.undefined("No random item, sequence was empty.")
+
+
+def do_filesizeformat(value, binary=False):
+    """Format the value like a 'human-readable' file size (i.e. 13 kB,
+    4.1 MB, 102 Bytes, etc).  Per default decimal prefixes are used (Mega,
+    Giga, etc.), if the second parameter is set to `True` the binary
+    prefixes are used (Mebi, Gibi).
+    """
+    bytes = float(value)
+    base = binary and 1024 or 1000
+    prefixes = [
+        (binary and "KiB" or "kB"),
+        (binary and "MiB" or "MB"),
+        (binary and "GiB" or "GB"),
+        (binary and "TiB" or "TB"),
+        (binary and "PiB" or "PB"),
+        (binary and "EiB" or "EB"),
+        (binary and "ZiB" or "ZB"),
+        (binary and "YiB" or "YB"),
+    ]
+    if bytes == 1:
+        return "1 Byte"
+    elif bytes < base:
+        return "%d Bytes" % bytes
+    else:
+        for i, prefix in enumerate(prefixes):
+            unit = base ** (i + 2)
+            if bytes < unit:
+                return "%.1f %s" % ((base * bytes / unit), prefix)
+        return "%.1f %s" % ((base * bytes / unit), prefix)
+
+
+def do_pprint(value, verbose=False):
+    """Pretty print a variable. Useful for debugging.
+
+    With Jinja 1.2 onwards you can pass it a parameter.  If this parameter
+    is truthy the output will be more verbose (this requires `pretty`)
+    """
+    return pformat(value, verbose=verbose)
+
+
+@evalcontextfilter
+def do_urlize(
+    eval_ctx, value, trim_url_limit=None, nofollow=False, target=None, rel=None
+):
+    """Converts URLs in plain text into clickable links.
+
+    If you pass the filter an additional integer it will shorten the urls
+    to that number. Also a third argument exists that makes the urls
+    "nofollow":
+
+    .. sourcecode:: jinja
+
+        {{ mytext|urlize(40, true) }}
+            links are shortened to 40 chars and defined with rel="nofollow"
+
+    If *target* is specified, the ``target`` attribute will be added to the
+    ``<a>`` tag:
+
+    .. sourcecode:: jinja
+
+       {{ mytext|urlize(40, target='_blank') }}
+
+    .. versionchanged:: 2.8+
+       The *target* parameter was added.
+    """
+    policies = eval_ctx.environment.policies
+    rel = set((rel or "").split() or [])
+    if nofollow:
+        rel.add("nofollow")
+    rel.update((policies["urlize.rel"] or "").split())
+    if target is None:
+        target = policies["urlize.target"]
+    rel = " ".join(sorted(rel)) or None
+    rv = urlize(value, trim_url_limit, rel=rel, target=target)
+    if eval_ctx.autoescape:
+        rv = Markup(rv)
+    return rv
+
+
+def do_indent(s, width=4, first=False, blank=False, indentfirst=None):
+    """Return a copy of the string with each line indented by 4 spaces. The
+    first line and blank lines are not indented by default.
+
+    :param width: Number of spaces to indent by.
+    :param first: Don't skip indenting the first line.
+    :param blank: Don't skip indenting empty lines.
+
+    .. versionchanged:: 2.10
+        Blank lines are not indented by default.
+
+        Rename the ``indentfirst`` argument to ``first``.
+    """
+    if indentfirst is not None:
+        warnings.warn(
+            "The 'indentfirst' argument is renamed to 'first' and will"
+            " be removed in version 3.0.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        first = indentfirst
+
+    indention = u" " * width
+    newline = u"\n"
+
+    if isinstance(s, Markup):
+        indention = Markup(indention)
+        newline = Markup(newline)
+
+    s += newline  # this quirk is necessary for splitlines method
+
+    if blank:
+        rv = (newline + indention).join(s.splitlines())
+    else:
+        lines = s.splitlines()
+        rv = lines.pop(0)
+
+        if lines:
+            rv += newline + newline.join(
+                indention + line if line else line for line in lines
+            )
+
+    if first:
+        rv = indention + rv
+
+    return rv
+
+
+@environmentfilter
+def do_truncate(env, s, length=255, killwords=False, end="...", leeway=None):
+    """Return a truncated copy of the string. The length is specified
+    with the first parameter which defaults to ``255``. If the second
+    parameter is ``true`` the filter will cut the text at length. Otherwise
+    it will discard the last word. If the text was in fact
+    truncated it will append an ellipsis sign (``"..."``). If you want a
+    different ellipsis sign than ``"..."`` you can specify it using the
+    third parameter. Strings that only exceed the length by the tolerance
+    margin given in the fourth parameter will not be truncated.
+
+    .. sourcecode:: jinja
+
+        {{ "foo bar baz qux"|truncate(9) }}
+            -> "foo..."
+        {{ "foo bar baz qux"|truncate(9, True) }}
+            -> "foo ba..."
+        {{ "foo bar baz qux"|truncate(11) }}
+            -> "foo bar baz qux"
+        {{ "foo bar baz qux"|truncate(11, False, '...', 0) }}
+            -> "foo bar..."
+
+    The default leeway on newer Jinja versions is 5 and was 0 before but
+    can be reconfigured globally.
+    """
+    if leeway is None:
+        leeway = env.policies["truncate.leeway"]
+    assert length >= len(end), "expected length >= %s, got %s" % (len(end), length)
+    assert leeway >= 0, "expected leeway >= 0, got %s" % leeway
+    if len(s) <= length + leeway:
+        return s
+    if killwords:
+        return s[: length - len(end)] + end
+    result = s[: length - len(end)].rsplit(" ", 1)[0]
+    return result + end
+
+
+@environmentfilter
+def do_wordwrap(
+    environment,
+    s,
+    width=79,
+    break_long_words=True,
+    wrapstring=None,
+    break_on_hyphens=True,
+):
+    """Wrap a string to the given width. Existing newlines are treated
+    as paragraphs to be wrapped separately.
+
+    :param s: Original text to wrap.
+    :param width: Maximum length of wrapped lines.
+    :param break_long_words: If a word is longer than ``width``, break
+        it across lines.
+    :param break_on_hyphens: If a word contains hyphens, it may be split
+        across lines.
+    :param wrapstring: String to join each wrapped line. Defaults to
+        :attr:`Environment.newline_sequence`.
+
+    .. versionchanged:: 2.11
+        Existing newlines are treated as paragraphs wrapped separately.
+
+    .. versionchanged:: 2.11
+        Added the ``break_on_hyphens`` parameter.
+
+    .. versionchanged:: 2.7
+        Added the ``wrapstring`` parameter.
+    """
+
+    import textwrap
+
+    if not wrapstring:
+        wrapstring = environment.newline_sequence
+
+    # textwrap.wrap doesn't consider existing newlines when wrapping.
+    # If the string has a newline before width, wrap will still insert
+    # a newline at width, resulting in a short line. Instead, split and
+    # wrap each paragraph individually.
+    return wrapstring.join(
+        [
+            wrapstring.join(
+                textwrap.wrap(
+                    line,
+                    width=width,
+                    expand_tabs=False,
+                    replace_whitespace=False,
+                    break_long_words=break_long_words,
+                    break_on_hyphens=break_on_hyphens,
+                )
+            )
+            for line in s.splitlines()
+        ]
+    )
+
+
+def do_wordcount(s):
+    """Count the words in that string."""
+    return len(_word_re.findall(soft_unicode(s)))
+
+
+def do_int(value, default=0, base=10):
+    """Convert the value into an integer. If the
+    conversion doesn't work it will return ``0``. You can
+    override this default using the first parameter. You
+    can also override the default base (10) in the second
+    parameter, which handles input with prefixes such as
+    0b, 0o and 0x for bases 2, 8 and 16 respectively.
+    The base is ignored for decimal numbers and non-string values.
+    """
+    try:
+        if isinstance(value, string_types):
+            return int(value, base)
+        return int(value)
+    except (TypeError, ValueError):
+        # this quirk is necessary so that "42.23"|int gives 42.
+        try:
+            return int(float(value))
+        except (TypeError, ValueError):
+            return default
+
+
+def do_float(value, default=0.0):
+    """Convert the value into a floating point number. If the
+    conversion doesn't work it will return ``0.0``. You can
+    override this default using the first parameter.
+    """
+    try:
+        return float(value)
+    except (TypeError, ValueError):
+        return default
+
+
+def do_format(value, *args, **kwargs):
+    """Apply the given values to a `printf-style`_ format string, like
+    ``string % values``.
+
+    .. sourcecode:: jinja
+
+        {{ "%s, %s!"|format(greeting, name) }}
+        Hello, World!
+
+    In most cases it should be more convenient and efficient to use the
+    ``%`` operator or :meth:`str.format`.
+
+    .. code-block:: text
+
+        {{ "%s, %s!" % (greeting, name) }}
+        {{ "{}, {}!".format(greeting, name) }}
+
+    .. _printf-style: https://docs.python.org/library/stdtypes.html
+        #printf-style-string-formatting
+    """
+    if args and kwargs:
+        raise FilterArgumentError(
+            "can't handle positional and keyword arguments at the same time"
+        )
+    return soft_unicode(value) % (kwargs or args)
+
+
+def do_trim(value, chars=None):
+    """Strip leading and trailing characters, by default whitespace."""
+    return soft_unicode(value).strip(chars)
+
+
+def do_striptags(value):
+    """Strip SGML/XML tags and replace adjacent whitespace by one space."""
+    if hasattr(value, "__html__"):
+        value = value.__html__()
+    return Markup(text_type(value)).striptags()
+
+
+def do_slice(value, slices, fill_with=None):
+    """Slice an iterator and return a list of lists containing
+    those items. Useful if you want to create a div containing
+    three ul tags that represent columns:
+
+    .. sourcecode:: html+jinja
+
+        <div class="columnwrapper">
+          {%- for column in items|slice(3) %}
+            <ul class="column-{{ loop.index }}">
+            {%- for item in column %}
+              <li>{{ item }}</li>
+            {%- endfor %}
+            </ul>
+          {%- endfor %}
+        </div>
+
+    If you pass it a second argument it's used to fill missing
+    values on the last iteration.
+    """
+    seq = list(value)
+    length = len(seq)
+    items_per_slice = length // slices
+    slices_with_extra = length % slices
+    offset = 0
+    for slice_number in range(slices):
+        start = offset + slice_number * items_per_slice
+        if slice_number < slices_with_extra:
+            offset += 1
+        end = offset + (slice_number + 1) * items_per_slice
+        tmp = seq[start:end]
+        if fill_with is not None and slice_number >= slices_with_extra:
+            tmp.append(fill_with)
+        yield tmp
+
+
+def do_batch(value, linecount, fill_with=None):
+    """
+    A filter that batches items. It works pretty much like `slice`
+    just the other way round. It returns a list of lists with the
+    given number of items. If you provide a second parameter this
+    is used to fill up missing items. See this example:
+
+    .. sourcecode:: html+jinja
+
+        <table>
+        {%- for row in items|batch(3, '&nbsp;') %}
+          <tr>
+          {%- for column in row %}
+            <td>{{ column }}</td>
+          {%- endfor %}
+          </tr>
+        {%- endfor %}
+        </table>
+    """
+    tmp = []
+    for item in value:
+        if len(tmp) == linecount:
+            yield tmp
+            tmp = []
+        tmp.append(item)
+    if tmp:
+        if fill_with is not None and len(tmp) < linecount:
+            tmp += [fill_with] * (linecount - len(tmp))
+        yield tmp
+
+
+def do_round(value, precision=0, method="common"):
+    """Round the number to a given precision. The first
+    parameter specifies the precision (default is ``0``), the
+    second the rounding method:
+
+    - ``'common'`` rounds either up or down
+    - ``'ceil'`` always rounds up
+    - ``'floor'`` always rounds down
+
+    If you don't specify a method ``'common'`` is used.
+
+    .. sourcecode:: jinja
+
+        {{ 42.55|round }}
+            -> 43.0
+        {{ 42.55|round(1, 'floor') }}
+            -> 42.5
+
+    Note that even if rounded to 0 precision, a float is returned.  If
+    you need a real integer, pipe it through `int`:
+
+    .. sourcecode:: jinja
+
+        {{ 42.55|round|int }}
+            -> 43
+    """
+    if method not in {"common", "ceil", "floor"}:
+        raise FilterArgumentError("method must be common, ceil or floor")
+    if method == "common":
+        return round(value, precision)
+    func = getattr(math, method)
+    return func(value * (10 ** precision)) / (10 ** precision)
+
+
+# Use a regular tuple repr here.  This is what we did in the past and we
+# really want to hide this custom type as much as possible.  In particular
+# we do not want to accidentally expose an auto generated repr in case
+# people start to print this out in comments or something similar for
+# debugging.
+_GroupTuple = namedtuple("_GroupTuple", ["grouper", "list"])
+_GroupTuple.__repr__ = tuple.__repr__
+_GroupTuple.__str__ = tuple.__str__
+
+
+@environmentfilter
+def do_groupby(environment, value, attribute):
+    """Group a sequence of objects by an attribute using Python's
+    :func:`itertools.groupby`. The attribute can use dot notation for
+    nested access, like ``"address.city"``. Unlike Python's ``groupby``,
+    the values are sorted first so only one group is returned for each
+    unique value.
+
+    For example, a list of ``User`` objects with a ``city`` attribute
+    can be rendered in groups. In this example, ``grouper`` refers to
+    the ``city`` value of the group.
+
+    .. sourcecode:: html+jinja
+
+        <ul>{% for city, items in users|groupby("city") %}
+          <li>{{ city }}
+            <ul>{% for user in items %}
+              <li>{{ user.name }}
+            {% endfor %}</ul>
+          </li>
+        {% endfor %}</ul>
+
+    ``groupby`` yields namedtuples of ``(grouper, list)``, which
+    can be used instead of the tuple unpacking above. ``grouper`` is the
+    value of the attribute, and ``list`` is the items with that value.
+
+    .. sourcecode:: html+jinja
+
+        <ul>{% for group in users|groupby("city") %}
+          <li>{{ group.grouper }}: {{ group.list|join(", ") }}
+        {% endfor %}</ul>
+
+    .. versionchanged:: 2.6
+        The attribute supports dot notation for nested access.
+    """
+    expr = make_attrgetter(environment, attribute)
+    return [
+        _GroupTuple(key, list(values))
+        for key, values in groupby(sorted(value, key=expr), expr)
+    ]
+
+
+@environmentfilter
+def do_sum(environment, iterable, attribute=None, start=0):
+    """Returns the sum of a sequence of numbers plus the value of parameter
+    'start' (which defaults to 0).  When the sequence is empty it returns
+    start.
+
+    It is also possible to sum up only certain attributes:
+
+    .. sourcecode:: jinja
+
+        Total: {{ items|sum(attribute='price') }}
+
+    .. versionchanged:: 2.6
+       The `attribute` parameter was added to allow suming up over
+       attributes.  Also the `start` parameter was moved on to the right.
+    """
+    if attribute is not None:
+        iterable = imap(make_attrgetter(environment, attribute), iterable)
+    return sum(iterable, start)
+
+
+def do_list(value):
+    """Convert the value into a list.  If it was a string the returned list
+    will be a list of characters.
+    """
+    return list(value)
+
+
+def do_mark_safe(value):
+    """Mark the value as safe which means that in an environment with automatic
+    escaping enabled this variable will not be escaped.
+    """
+    return Markup(value)
+
+
+def do_mark_unsafe(value):
+    """Mark a value as unsafe.  This is the reverse operation for :func:`safe`."""
+    return text_type(value)
+
+
+def do_reverse(value):
+    """Reverse the object or return an iterator that iterates over it the other
+    way round.
+    """
+    if isinstance(value, string_types):
+        return value[::-1]
+    try:
+        return reversed(value)
+    except TypeError:
+        try:
+            rv = list(value)
+            rv.reverse()
+            return rv
+        except TypeError:
+            raise FilterArgumentError("argument must be iterable")
+
+
+@environmentfilter
+def do_attr(environment, obj, name):
+    """Get an attribute of an object.  ``foo|attr("bar")`` works like
+    ``foo.bar`` just that always an attribute is returned and items are not
+    looked up.
+
+    See :ref:`Notes on subscriptions <notes-on-subscriptions>` for more details.
+    """
+    try:
+        name = str(name)
+    except UnicodeError:
+        pass
+    else:
+        try:
+            value = getattr(obj, name)
+        except AttributeError:
+            pass
+        else:
+            if environment.sandboxed and not environment.is_safe_attribute(
+                obj, name, value
+            ):
+                return environment.unsafe_undefined(obj, name)
+            return value
+    return environment.undefined(obj=obj, name=name)
+
+
+@contextfilter
+def do_map(*args, **kwargs):
+    """Applies a filter on a sequence of objects or looks up an attribute.
+    This is useful when dealing with lists of objects but you are really
+    only interested in a certain value of it.
+
+    The basic usage is mapping on an attribute.  Imagine you have a list
+    of users but you are only interested in a list of usernames:
+
+    .. sourcecode:: jinja
+
+        Users on this page: {{ users|map(attribute='username')|join(', ') }}
+
+    You can specify a ``default`` value to use if an object in the list
+    does not have the given attribute.
+
+    .. sourcecode:: jinja
+
+        {{ users|map(attribute="username", default="Anonymous")|join(", ") }}
+
+    Alternatively you can let it invoke a filter by passing the name of the
+    filter and the arguments afterwards.  A good example would be applying a
+    text conversion filter on a sequence:
+
+    .. sourcecode:: jinja
+
+        Users on this page: {{ titles|map('lower')|join(', ') }}
+
+    Similar to a generator comprehension such as:
+
+    .. code-block:: python
+
+        (u.username for u in users)
+        (u.username or "Anonymous" for u in users)
+        (do_lower(x) for x in titles)
+
+    .. versionchanged:: 2.11.0
+        Added the ``default`` parameter.
+
+    .. versionadded:: 2.7
+    """
+    seq, func = prepare_map(args, kwargs)
+    if seq:
+        for item in seq:
+            yield func(item)
+
+
+@contextfilter
+def do_select(*args, **kwargs):
+    """Filters a sequence of objects by applying a test to each object,
+    and only selecting the objects with the test succeeding.
+
+    If no test is specified, each object will be evaluated as a boolean.
+
+    Example usage:
+
+    .. sourcecode:: jinja
+
+        {{ numbers|select("odd") }}
+        {{ numbers|select("odd") }}
+        {{ numbers|select("divisibleby", 3) }}
+        {{ numbers|select("lessthan", 42) }}
+        {{ strings|select("equalto", "mystring") }}
+
+    Similar to a generator comprehension such as:
+
+    .. code-block:: python
+
+        (n for n in numbers if test_odd(n))
+        (n for n in numbers if test_divisibleby(n, 3))
+
+    .. versionadded:: 2.7
+    """
+    return select_or_reject(args, kwargs, lambda x: x, False)
+
+
+@contextfilter
+def do_reject(*args, **kwargs):
+    """Filters a sequence of objects by applying a test to each object,
+    and rejecting the objects with the test succeeding.
+
+    If no test is specified, each object will be evaluated as a boolean.
+
+    Example usage:
+
+    .. sourcecode:: jinja
+
+        {{ numbers|reject("odd") }}
+
+    Similar to a generator comprehension such as:
+
+    .. code-block:: python
+
+        (n for n in numbers if not test_odd(n))
+
+    .. versionadded:: 2.7
+    """
+    return select_or_reject(args, kwargs, lambda x: not x, False)
+
+
+@contextfilter
+def do_selectattr(*args, **kwargs):
+    """Filters a sequence of objects by applying a test to the specified
+    attribute of each object, and only selecting the objects with the
+    test succeeding.
+
+    If no test is specified, the attribute's value will be evaluated as
+    a boolean.
+
+    Example usage:
+
+    .. sourcecode:: jinja
+
+        {{ users|selectattr("is_active") }}
+        {{ users|selectattr("email", "none") }}
+
+    Similar to a generator comprehension such as:
+
+    .. code-block:: python
+
+        (u for user in users if user.is_active)
+        (u for user in users if test_none(user.email))
+
+    .. versionadded:: 2.7
+    """
+    return select_or_reject(args, kwargs, lambda x: x, True)
+
+
+@contextfilter
+def do_rejectattr(*args, **kwargs):
+    """Filters a sequence of objects by applying a test to the specified
+    attribute of each object, and rejecting the objects with the test
+    succeeding.
+
+    If no test is specified, the attribute's value will be evaluated as
+    a boolean.
+
+    .. sourcecode:: jinja
+
+        {{ users|rejectattr("is_active") }}
+        {{ users|rejectattr("email", "none") }}
+
+    Similar to a generator comprehension such as:
+
+    .. code-block:: python
+
+        (u for user in users if not user.is_active)
+        (u for user in users if not test_none(user.email))
+
+    .. versionadded:: 2.7
+    """
+    return select_or_reject(args, kwargs, lambda x: not x, True)
+
+
+@evalcontextfilter
+def do_tojson(eval_ctx, value, indent=None):
+    """Dumps a structure to JSON so that it's safe to use in ``<script>``
+    tags.  It accepts the same arguments and returns a JSON string.  Note that
+    this is available in templates through the ``|tojson`` filter which will
+    also mark the result as safe.  Due to how this function escapes certain
+    characters this is safe even if used outside of ``<script>`` tags.
+
+    The following characters are escaped in strings:
+
+    -   ``<``
+    -   ``>``
+    -   ``&``
+    -   ``'``
+
+    This makes it safe to embed such strings in any place in HTML with the
+    notable exception of double quoted attributes.  In that case single
+    quote your attributes or HTML escape it in addition.
+
+    The indent parameter can be used to enable pretty printing.  Set it to
+    the number of spaces that the structures should be indented with.
+
+    Note that this filter is for use in HTML contexts only.
+
+    .. versionadded:: 2.9
+    """
+    policies = eval_ctx.environment.policies
+    dumper = policies["json.dumps_function"]
+    options = policies["json.dumps_kwargs"]
+    if indent is not None:
+        options = dict(options)
+        options["indent"] = indent
+    return htmlsafe_json_dumps(value, dumper=dumper, **options)
+
+
+def prepare_map(args, kwargs):
+    context = args[0]
+    seq = args[1]
+    default = None
+
+    if len(args) == 2 and "attribute" in kwargs:
+        attribute = kwargs.pop("attribute")
+        default = kwargs.pop("default", None)
+        if kwargs:
+            raise FilterArgumentError(
+                "Unexpected keyword argument %r" % next(iter(kwargs))
+            )
+        func = make_attrgetter(context.environment, attribute, default=default)
+    else:
+        try:
+            name = args[2]
+            args = args[3:]
+        except LookupError:
+            raise FilterArgumentError("map requires a filter argument")
+
+        def func(item):
+            return context.environment.call_filter(
+                name, item, args, kwargs, context=context
+            )
+
+    return seq, func
+
+
+def prepare_select_or_reject(args, kwargs, modfunc, lookup_attr):
+    context = args[0]
+    seq = args[1]
+    if lookup_attr:
+        try:
+            attr = args[2]
+        except LookupError:
+            raise FilterArgumentError("Missing parameter for attribute name")
+        transfunc = make_attrgetter(context.environment, attr)
+        off = 1
+    else:
+        off = 0
+
+        def transfunc(x):
+            return x
+
+    try:
+        name = args[2 + off]
+        args = args[3 + off :]
+
+        def func(item):
+            return context.environment.call_test(name, item, args, kwargs)
+
+    except LookupError:
+        func = bool
+
+    return seq, lambda item: modfunc(func(transfunc(item)))
+
+
+def select_or_reject(args, kwargs, modfunc, lookup_attr):
+    seq, func = prepare_select_or_reject(args, kwargs, modfunc, lookup_attr)
+    if seq:
+        for item in seq:
+            if func(item):
+                yield item
+
+
+FILTERS = {
+    "abs": abs,
+    "attr": do_attr,
+    "batch": do_batch,
+    "capitalize": do_capitalize,
+    "center": do_center,
+    "count": len,
+    "d": do_default,
+    "default": do_default,
+    "dictsort": do_dictsort,
+    "e": escape,
+    "escape": escape,
+    "filesizeformat": do_filesizeformat,
+    "first": do_first,
+    "float": do_float,
+    "forceescape": do_forceescape,
+    "format": do_format,
+    "groupby": do_groupby,
+    "indent": do_indent,
+    "int": do_int,
+    "join": do_join,
+    "last": do_last,
+    "length": len,
+    "list": do_list,
+    "lower": do_lower,
+    "map": do_map,
+    "min": do_min,
+    "max": do_max,
+    "pprint": do_pprint,
+    "random": do_random,
+    "reject": do_reject,
+    "rejectattr": do_rejectattr,
+    "replace": do_replace,
+    "reverse": do_reverse,
+    "round": do_round,
+    "safe": do_mark_safe,
+    "select": do_select,
+    "selectattr": do_selectattr,
+    "slice": do_slice,
+    "sort": do_sort,
+    "string": soft_unicode,
+    "striptags": do_striptags,
+    "sum": do_sum,
+    "title": do_title,
+    "trim": do_trim,
+    "truncate": do_truncate,
+    "unique": do_unique,
+    "upper": do_upper,
+    "urlencode": do_urlencode,
+    "urlize": do_urlize,
+    "wordcount": do_wordcount,
+    "wordwrap": do_wordwrap,
+    "xmlattr": do_xmlattr,
+    "tojson": do_tojson,
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/idtracking.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/idtracking.py
new file mode 100644
index 0000000..9a0d838
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/idtracking.py
@@ -0,0 +1,290 @@
+from ._compat import iteritems
+from .visitor import NodeVisitor
+
+VAR_LOAD_PARAMETER = "param"
+VAR_LOAD_RESOLVE = "resolve"
+VAR_LOAD_ALIAS = "alias"
+VAR_LOAD_UNDEFINED = "undefined"
+
+
+def find_symbols(nodes, parent_symbols=None):
+    sym = Symbols(parent=parent_symbols)
+    visitor = FrameSymbolVisitor(sym)
+    for node in nodes:
+        visitor.visit(node)
+    return sym
+
+
+def symbols_for_node(node, parent_symbols=None):
+    sym = Symbols(parent=parent_symbols)
+    sym.analyze_node(node)
+    return sym
+
+
+class Symbols(object):
+    def __init__(self, parent=None, level=None):
+        if level is None:
+            if parent is None:
+                level = 0
+            else:
+                level = parent.level + 1
+        self.level = level
+        self.parent = parent
+        self.refs = {}
+        self.loads = {}
+        self.stores = set()
+
+    def analyze_node(self, node, **kwargs):
+        visitor = RootVisitor(self)
+        visitor.visit(node, **kwargs)
+
+    def _define_ref(self, name, load=None):
+        ident = "l_%d_%s" % (self.level, name)
+        self.refs[name] = ident
+        if load is not None:
+            self.loads[ident] = load
+        return ident
+
+    def find_load(self, target):
+        if target in self.loads:
+            return self.loads[target]
+        if self.parent is not None:
+            return self.parent.find_load(target)
+
+    def find_ref(self, name):
+        if name in self.refs:
+            return self.refs[name]
+        if self.parent is not None:
+            return self.parent.find_ref(name)
+
+    def ref(self, name):
+        rv = self.find_ref(name)
+        if rv is None:
+            raise AssertionError(
+                "Tried to resolve a name to a reference that "
+                "was unknown to the frame (%r)" % name
+            )
+        return rv
+
+    def copy(self):
+        rv = object.__new__(self.__class__)
+        rv.__dict__.update(self.__dict__)
+        rv.refs = self.refs.copy()
+        rv.loads = self.loads.copy()
+        rv.stores = self.stores.copy()
+        return rv
+
+    def store(self, name):
+        self.stores.add(name)
+
+        # If we have not see the name referenced yet, we need to figure
+        # out what to set it to.
+        if name not in self.refs:
+            # If there is a parent scope we check if the name has a
+            # reference there.  If it does it means we might have to alias
+            # to a variable there.
+            if self.parent is not None:
+                outer_ref = self.parent.find_ref(name)
+                if outer_ref is not None:
+                    self._define_ref(name, load=(VAR_LOAD_ALIAS, outer_ref))
+                    return
+
+            # Otherwise we can just set it to undefined.
+            self._define_ref(name, load=(VAR_LOAD_UNDEFINED, None))
+
+    def declare_parameter(self, name):
+        self.stores.add(name)
+        return self._define_ref(name, load=(VAR_LOAD_PARAMETER, None))
+
+    def load(self, name):
+        target = self.find_ref(name)
+        if target is None:
+            self._define_ref(name, load=(VAR_LOAD_RESOLVE, name))
+
+    def branch_update(self, branch_symbols):
+        stores = {}
+        for branch in branch_symbols:
+            for target in branch.stores:
+                if target in self.stores:
+                    continue
+                stores[target] = stores.get(target, 0) + 1
+
+        for sym in branch_symbols:
+            self.refs.update(sym.refs)
+            self.loads.update(sym.loads)
+            self.stores.update(sym.stores)
+
+        for name, branch_count in iteritems(stores):
+            if branch_count == len(branch_symbols):
+                continue
+            target = self.find_ref(name)
+            assert target is not None, "should not happen"
+
+            if self.parent is not None:
+                outer_target = self.parent.find_ref(name)
+                if outer_target is not None:
+                    self.loads[target] = (VAR_LOAD_ALIAS, outer_target)
+                    continue
+            self.loads[target] = (VAR_LOAD_RESOLVE, name)
+
+    def dump_stores(self):
+        rv = {}
+        node = self
+        while node is not None:
+            for name in node.stores:
+                if name not in rv:
+                    rv[name] = self.find_ref(name)
+            node = node.parent
+        return rv
+
+    def dump_param_targets(self):
+        rv = set()
+        node = self
+        while node is not None:
+            for target, (instr, _) in iteritems(self.loads):
+                if instr == VAR_LOAD_PARAMETER:
+                    rv.add(target)
+            node = node.parent
+        return rv
+
+
+class RootVisitor(NodeVisitor):
+    def __init__(self, symbols):
+        self.sym_visitor = FrameSymbolVisitor(symbols)
+
+    def _simple_visit(self, node, **kwargs):
+        for child in node.iter_child_nodes():
+            self.sym_visitor.visit(child)
+
+    visit_Template = (
+        visit_Block
+    ) = (
+        visit_Macro
+    ) = (
+        visit_FilterBlock
+    ) = visit_Scope = visit_If = visit_ScopedEvalContextModifier = _simple_visit
+
+    def visit_AssignBlock(self, node, **kwargs):
+        for child in node.body:
+            self.sym_visitor.visit(child)
+
+    def visit_CallBlock(self, node, **kwargs):
+        for child in node.iter_child_nodes(exclude=("call",)):
+            self.sym_visitor.visit(child)
+
+    def visit_OverlayScope(self, node, **kwargs):
+        for child in node.body:
+            self.sym_visitor.visit(child)
+
+    def visit_For(self, node, for_branch="body", **kwargs):
+        if for_branch == "body":
+            self.sym_visitor.visit(node.target, store_as_param=True)
+            branch = node.body
+        elif for_branch == "else":
+            branch = node.else_
+        elif for_branch == "test":
+            self.sym_visitor.visit(node.target, store_as_param=True)
+            if node.test is not None:
+                self.sym_visitor.visit(node.test)
+            return
+        else:
+            raise RuntimeError("Unknown for branch")
+        for item in branch or ():
+            self.sym_visitor.visit(item)
+
+    def visit_With(self, node, **kwargs):
+        for target in node.targets:
+            self.sym_visitor.visit(target)
+        for child in node.body:
+            self.sym_visitor.visit(child)
+
+    def generic_visit(self, node, *args, **kwargs):
+        raise NotImplementedError(
+            "Cannot find symbols for %r" % node.__class__.__name__
+        )
+
+
+class FrameSymbolVisitor(NodeVisitor):
+    """A visitor for `Frame.inspect`."""
+
+    def __init__(self, symbols):
+        self.symbols = symbols
+
+    def visit_Name(self, node, store_as_param=False, **kwargs):
+        """All assignments to names go through this function."""
+        if store_as_param or node.ctx == "param":
+            self.symbols.declare_parameter(node.name)
+        elif node.ctx == "store":
+            self.symbols.store(node.name)
+        elif node.ctx == "load":
+            self.symbols.load(node.name)
+
+    def visit_NSRef(self, node, **kwargs):
+        self.symbols.load(node.name)
+
+    def visit_If(self, node, **kwargs):
+        self.visit(node.test, **kwargs)
+
+        original_symbols = self.symbols
+
+        def inner_visit(nodes):
+            self.symbols = rv = original_symbols.copy()
+            for subnode in nodes:
+                self.visit(subnode, **kwargs)
+            self.symbols = original_symbols
+            return rv
+
+        body_symbols = inner_visit(node.body)
+        elif_symbols = inner_visit(node.elif_)
+        else_symbols = inner_visit(node.else_ or ())
+
+        self.symbols.branch_update([body_symbols, elif_symbols, else_symbols])
+
+    def visit_Macro(self, node, **kwargs):
+        self.symbols.store(node.name)
+
+    def visit_Import(self, node, **kwargs):
+        self.generic_visit(node, **kwargs)
+        self.symbols.store(node.target)
+
+    def visit_FromImport(self, node, **kwargs):
+        self.generic_visit(node, **kwargs)
+        for name in node.names:
+            if isinstance(name, tuple):
+                self.symbols.store(name[1])
+            else:
+                self.symbols.store(name)
+
+    def visit_Assign(self, node, **kwargs):
+        """Visit assignments in the correct order."""
+        self.visit(node.node, **kwargs)
+        self.visit(node.target, **kwargs)
+
+    def visit_For(self, node, **kwargs):
+        """Visiting stops at for blocks.  However the block sequence
+        is visited as part of the outer scope.
+        """
+        self.visit(node.iter, **kwargs)
+
+    def visit_CallBlock(self, node, **kwargs):
+        self.visit(node.call, **kwargs)
+
+    def visit_FilterBlock(self, node, **kwargs):
+        self.visit(node.filter, **kwargs)
+
+    def visit_With(self, node, **kwargs):
+        for target in node.values:
+            self.visit(target)
+
+    def visit_AssignBlock(self, node, **kwargs):
+        """Stop visiting at block assigns."""
+        self.visit(node.target, **kwargs)
+
+    def visit_Scope(self, node, **kwargs):
+        """Stop visiting at scopes."""
+
+    def visit_Block(self, node, **kwargs):
+        """Stop visiting at blocks."""
+
+    def visit_OverlayScope(self, node, **kwargs):
+        """Do not visit into overlay scopes."""
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/lexer.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/lexer.py
new file mode 100644
index 0000000..552356a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/lexer.py
@@ -0,0 +1,848 @@
+# -*- coding: utf-8 -*-
+"""Implements a Jinja / Python combination lexer. The ``Lexer`` class
+is used to do some preprocessing. It filters out invalid operators like
+the bitshift operators we don't allow in templates. It separates
+template code and python code in expressions.
+"""
+import re
+from ast import literal_eval
+from collections import deque
+from operator import itemgetter
+
+from ._compat import implements_iterator
+from ._compat import intern
+from ._compat import iteritems
+from ._compat import text_type
+from .exceptions import TemplateSyntaxError
+from .utils import LRUCache
+
+# cache for the lexers. Exists in order to be able to have multiple
+# environments with the same lexer
+_lexer_cache = LRUCache(50)
+
+# static regular expressions
+whitespace_re = re.compile(r"\s+", re.U)
+newline_re = re.compile(r"(\r\n|\r|\n)")
+string_re = re.compile(
+    r"('([^'\\]*(?:\\.[^'\\]*)*)'" r'|"([^"\\]*(?:\\.[^"\\]*)*)")', re.S
+)
+integer_re = re.compile(r"(\d+_)*\d+")
+float_re = re.compile(
+    r"""
+    (?<!\.)  # doesn't start with a .
+    (\d+_)*\d+  # digits, possibly _ separated
+    (
+        (\.(\d+_)*\d+)?  # optional fractional part
+        e[+\-]?(\d+_)*\d+  # exponent part
+    |
+        \.(\d+_)*\d+  # required fractional part
+    )
+    """,
+    re.IGNORECASE | re.VERBOSE,
+)
+
+try:
+    # check if this Python supports Unicode identifiers
+    compile("föö", "<unknown>", "eval")
+except SyntaxError:
+    # Python 2, no Unicode support, use ASCII identifiers
+    name_re = re.compile(r"[a-zA-Z_][a-zA-Z0-9_]*")
+    check_ident = False
+else:
+    # Unicode support, import generated re pattern and set flag to use
+    # str.isidentifier to validate during lexing.
+    from ._identifier import pattern as name_re
+
+    check_ident = True
+
+# internal the tokens and keep references to them
+TOKEN_ADD = intern("add")
+TOKEN_ASSIGN = intern("assign")
+TOKEN_COLON = intern("colon")
+TOKEN_COMMA = intern("comma")
+TOKEN_DIV = intern("div")
+TOKEN_DOT = intern("dot")
+TOKEN_EQ = intern("eq")
+TOKEN_FLOORDIV = intern("floordiv")
+TOKEN_GT = intern("gt")
+TOKEN_GTEQ = intern("gteq")
+TOKEN_LBRACE = intern("lbrace")
+TOKEN_LBRACKET = intern("lbracket")
+TOKEN_LPAREN = intern("lparen")
+TOKEN_LT = intern("lt")
+TOKEN_LTEQ = intern("lteq")
+TOKEN_MOD = intern("mod")
+TOKEN_MUL = intern("mul")
+TOKEN_NE = intern("ne")
+TOKEN_PIPE = intern("pipe")
+TOKEN_POW = intern("pow")
+TOKEN_RBRACE = intern("rbrace")
+TOKEN_RBRACKET = intern("rbracket")
+TOKEN_RPAREN = intern("rparen")
+TOKEN_SEMICOLON = intern("semicolon")
+TOKEN_SUB = intern("sub")
+TOKEN_TILDE = intern("tilde")
+TOKEN_WHITESPACE = intern("whitespace")
+TOKEN_FLOAT = intern("float")
+TOKEN_INTEGER = intern("integer")
+TOKEN_NAME = intern("name")
+TOKEN_STRING = intern("string")
+TOKEN_OPERATOR = intern("operator")
+TOKEN_BLOCK_BEGIN = intern("block_begin")
+TOKEN_BLOCK_END = intern("block_end")
+TOKEN_VARIABLE_BEGIN = intern("variable_begin")
+TOKEN_VARIABLE_END = intern("variable_end")
+TOKEN_RAW_BEGIN = intern("raw_begin")
+TOKEN_RAW_END = intern("raw_end")
+TOKEN_COMMENT_BEGIN = intern("comment_begin")
+TOKEN_COMMENT_END = intern("comment_end")
+TOKEN_COMMENT = intern("comment")
+TOKEN_LINESTATEMENT_BEGIN = intern("linestatement_begin")
+TOKEN_LINESTATEMENT_END = intern("linestatement_end")
+TOKEN_LINECOMMENT_BEGIN = intern("linecomment_begin")
+TOKEN_LINECOMMENT_END = intern("linecomment_end")
+TOKEN_LINECOMMENT = intern("linecomment")
+TOKEN_DATA = intern("data")
+TOKEN_INITIAL = intern("initial")
+TOKEN_EOF = intern("eof")
+
+# bind operators to token types
+operators = {
+    "+": TOKEN_ADD,
+    "-": TOKEN_SUB,
+    "/": TOKEN_DIV,
+    "//": TOKEN_FLOORDIV,
+    "*": TOKEN_MUL,
+    "%": TOKEN_MOD,
+    "**": TOKEN_POW,
+    "~": TOKEN_TILDE,
+    "[": TOKEN_LBRACKET,
+    "]": TOKEN_RBRACKET,
+    "(": TOKEN_LPAREN,
+    ")": TOKEN_RPAREN,
+    "{": TOKEN_LBRACE,
+    "}": TOKEN_RBRACE,
+    "==": TOKEN_EQ,
+    "!=": TOKEN_NE,
+    ">": TOKEN_GT,
+    ">=": TOKEN_GTEQ,
+    "<": TOKEN_LT,
+    "<=": TOKEN_LTEQ,
+    "=": TOKEN_ASSIGN,
+    ".": TOKEN_DOT,
+    ":": TOKEN_COLON,
+    "|": TOKEN_PIPE,
+    ",": TOKEN_COMMA,
+    ";": TOKEN_SEMICOLON,
+}
+
+reverse_operators = dict([(v, k) for k, v in iteritems(operators)])
+assert len(operators) == len(reverse_operators), "operators dropped"
+operator_re = re.compile(
+    "(%s)" % "|".join(re.escape(x) for x in sorted(operators, key=lambda x: -len(x)))
+)
+
+ignored_tokens = frozenset(
+    [
+        TOKEN_COMMENT_BEGIN,
+        TOKEN_COMMENT,
+        TOKEN_COMMENT_END,
+        TOKEN_WHITESPACE,
+        TOKEN_LINECOMMENT_BEGIN,
+        TOKEN_LINECOMMENT_END,
+        TOKEN_LINECOMMENT,
+    ]
+)
+ignore_if_empty = frozenset(
+    [TOKEN_WHITESPACE, TOKEN_DATA, TOKEN_COMMENT, TOKEN_LINECOMMENT]
+)
+
+
+def _describe_token_type(token_type):
+    if token_type in reverse_operators:
+        return reverse_operators[token_type]
+    return {
+        TOKEN_COMMENT_BEGIN: "begin of comment",
+        TOKEN_COMMENT_END: "end of comment",
+        TOKEN_COMMENT: "comment",
+        TOKEN_LINECOMMENT: "comment",
+        TOKEN_BLOCK_BEGIN: "begin of statement block",
+        TOKEN_BLOCK_END: "end of statement block",
+        TOKEN_VARIABLE_BEGIN: "begin of print statement",
+        TOKEN_VARIABLE_END: "end of print statement",
+        TOKEN_LINESTATEMENT_BEGIN: "begin of line statement",
+        TOKEN_LINESTATEMENT_END: "end of line statement",
+        TOKEN_DATA: "template data / text",
+        TOKEN_EOF: "end of template",
+    }.get(token_type, token_type)
+
+
+def describe_token(token):
+    """Returns a description of the token."""
+    if token.type == TOKEN_NAME:
+        return token.value
+    return _describe_token_type(token.type)
+
+
+def describe_token_expr(expr):
+    """Like `describe_token` but for token expressions."""
+    if ":" in expr:
+        type, value = expr.split(":", 1)
+        if type == TOKEN_NAME:
+            return value
+    else:
+        type = expr
+    return _describe_token_type(type)
+
+
+def count_newlines(value):
+    """Count the number of newline characters in the string.  This is
+    useful for extensions that filter a stream.
+    """
+    return len(newline_re.findall(value))
+
+
+def compile_rules(environment):
+    """Compiles all the rules from the environment into a list of rules."""
+    e = re.escape
+    rules = [
+        (
+            len(environment.comment_start_string),
+            TOKEN_COMMENT_BEGIN,
+            e(environment.comment_start_string),
+        ),
+        (
+            len(environment.block_start_string),
+            TOKEN_BLOCK_BEGIN,
+            e(environment.block_start_string),
+        ),
+        (
+            len(environment.variable_start_string),
+            TOKEN_VARIABLE_BEGIN,
+            e(environment.variable_start_string),
+        ),
+    ]
+
+    if environment.line_statement_prefix is not None:
+        rules.append(
+            (
+                len(environment.line_statement_prefix),
+                TOKEN_LINESTATEMENT_BEGIN,
+                r"^[ \t\v]*" + e(environment.line_statement_prefix),
+            )
+        )
+    if environment.line_comment_prefix is not None:
+        rules.append(
+            (
+                len(environment.line_comment_prefix),
+                TOKEN_LINECOMMENT_BEGIN,
+                r"(?:^|(?<=\S))[^\S\r\n]*" + e(environment.line_comment_prefix),
+            )
+        )
+
+    return [x[1:] for x in sorted(rules, reverse=True)]
+
+
+class Failure(object):
+    """Class that raises a `TemplateSyntaxError` if called.
+    Used by the `Lexer` to specify known errors.
+    """
+
+    def __init__(self, message, cls=TemplateSyntaxError):
+        self.message = message
+        self.error_class = cls
+
+    def __call__(self, lineno, filename):
+        raise self.error_class(self.message, lineno, filename)
+
+
+class Token(tuple):
+    """Token class."""
+
+    __slots__ = ()
+    lineno, type, value = (property(itemgetter(x)) for x in range(3))
+
+    def __new__(cls, lineno, type, value):
+        return tuple.__new__(cls, (lineno, intern(str(type)), value))
+
+    def __str__(self):
+        if self.type in reverse_operators:
+            return reverse_operators[self.type]
+        elif self.type == "name":
+            return self.value
+        return self.type
+
+    def test(self, expr):
+        """Test a token against a token expression.  This can either be a
+        token type or ``'token_type:token_value'``.  This can only test
+        against string values and types.
+        """
+        # here we do a regular string equality check as test_any is usually
+        # passed an iterable of not interned strings.
+        if self.type == expr:
+            return True
+        elif ":" in expr:
+            return expr.split(":", 1) == [self.type, self.value]
+        return False
+
+    def test_any(self, *iterable):
+        """Test against multiple token expressions."""
+        for expr in iterable:
+            if self.test(expr):
+                return True
+        return False
+
+    def __repr__(self):
+        return "Token(%r, %r, %r)" % (self.lineno, self.type, self.value)
+
+
+@implements_iterator
+class TokenStreamIterator(object):
+    """The iterator for tokenstreams.  Iterate over the stream
+    until the eof token is reached.
+    """
+
+    def __init__(self, stream):
+        self.stream = stream
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        token = self.stream.current
+        if token.type is TOKEN_EOF:
+            self.stream.close()
+            raise StopIteration()
+        next(self.stream)
+        return token
+
+
+@implements_iterator
+class TokenStream(object):
+    """A token stream is an iterable that yields :class:`Token`\\s.  The
+    parser however does not iterate over it but calls :meth:`next` to go
+    one token ahead.  The current active token is stored as :attr:`current`.
+    """
+
+    def __init__(self, generator, name, filename):
+        self._iter = iter(generator)
+        self._pushed = deque()
+        self.name = name
+        self.filename = filename
+        self.closed = False
+        self.current = Token(1, TOKEN_INITIAL, "")
+        next(self)
+
+    def __iter__(self):
+        return TokenStreamIterator(self)
+
+    def __bool__(self):
+        return bool(self._pushed) or self.current.type is not TOKEN_EOF
+
+    __nonzero__ = __bool__  # py2
+
+    @property
+    def eos(self):
+        """Are we at the end of the stream?"""
+        return not self
+
+    def push(self, token):
+        """Push a token back to the stream."""
+        self._pushed.append(token)
+
+    def look(self):
+        """Look at the next token."""
+        old_token = next(self)
+        result = self.current
+        self.push(result)
+        self.current = old_token
+        return result
+
+    def skip(self, n=1):
+        """Got n tokens ahead."""
+        for _ in range(n):
+            next(self)
+
+    def next_if(self, expr):
+        """Perform the token test and return the token if it matched.
+        Otherwise the return value is `None`.
+        """
+        if self.current.test(expr):
+            return next(self)
+
+    def skip_if(self, expr):
+        """Like :meth:`next_if` but only returns `True` or `False`."""
+        return self.next_if(expr) is not None
+
+    def __next__(self):
+        """Go one token ahead and return the old one.
+
+        Use the built-in :func:`next` instead of calling this directly.
+        """
+        rv = self.current
+        if self._pushed:
+            self.current = self._pushed.popleft()
+        elif self.current.type is not TOKEN_EOF:
+            try:
+                self.current = next(self._iter)
+            except StopIteration:
+                self.close()
+        return rv
+
+    def close(self):
+        """Close the stream."""
+        self.current = Token(self.current.lineno, TOKEN_EOF, "")
+        self._iter = None
+        self.closed = True
+
+    def expect(self, expr):
+        """Expect a given token type and return it.  This accepts the same
+        argument as :meth:`jinja2.lexer.Token.test`.
+        """
+        if not self.current.test(expr):
+            expr = describe_token_expr(expr)
+            if self.current.type is TOKEN_EOF:
+                raise TemplateSyntaxError(
+                    "unexpected end of template, expected %r." % expr,
+                    self.current.lineno,
+                    self.name,
+                    self.filename,
+                )
+            raise TemplateSyntaxError(
+                "expected token %r, got %r" % (expr, describe_token(self.current)),
+                self.current.lineno,
+                self.name,
+                self.filename,
+            )
+        try:
+            return self.current
+        finally:
+            next(self)
+
+
+def get_lexer(environment):
+    """Return a lexer which is probably cached."""
+    key = (
+        environment.block_start_string,
+        environment.block_end_string,
+        environment.variable_start_string,
+        environment.variable_end_string,
+        environment.comment_start_string,
+        environment.comment_end_string,
+        environment.line_statement_prefix,
+        environment.line_comment_prefix,
+        environment.trim_blocks,
+        environment.lstrip_blocks,
+        environment.newline_sequence,
+        environment.keep_trailing_newline,
+    )
+    lexer = _lexer_cache.get(key)
+    if lexer is None:
+        lexer = Lexer(environment)
+        _lexer_cache[key] = lexer
+    return lexer
+
+
+class OptionalLStrip(tuple):
+    """A special tuple for marking a point in the state that can have
+    lstrip applied.
+    """
+
+    __slots__ = ()
+
+    # Even though it looks like a no-op, creating instances fails
+    # without this.
+    def __new__(cls, *members, **kwargs):
+        return super(OptionalLStrip, cls).__new__(cls, members)
+
+
+class Lexer(object):
+    """Class that implements a lexer for a given environment. Automatically
+    created by the environment class, usually you don't have to do that.
+
+    Note that the lexer is not automatically bound to an environment.
+    Multiple environments can share the same lexer.
+    """
+
+    def __init__(self, environment):
+        # shortcuts
+        e = re.escape
+
+        def c(x):
+            return re.compile(x, re.M | re.S)
+
+        # lexing rules for tags
+        tag_rules = [
+            (whitespace_re, TOKEN_WHITESPACE, None),
+            (float_re, TOKEN_FLOAT, None),
+            (integer_re, TOKEN_INTEGER, None),
+            (name_re, TOKEN_NAME, None),
+            (string_re, TOKEN_STRING, None),
+            (operator_re, TOKEN_OPERATOR, None),
+        ]
+
+        # assemble the root lexing rule. because "|" is ungreedy
+        # we have to sort by length so that the lexer continues working
+        # as expected when we have parsing rules like <% for block and
+        # <%= for variables. (if someone wants asp like syntax)
+        # variables are just part of the rules if variable processing
+        # is required.
+        root_tag_rules = compile_rules(environment)
+
+        # block suffix if trimming is enabled
+        block_suffix_re = environment.trim_blocks and "\\n?" or ""
+
+        # If lstrip is enabled, it should not be applied if there is any
+        # non-whitespace between the newline and block.
+        self.lstrip_unless_re = c(r"[^ \t]") if environment.lstrip_blocks else None
+
+        self.newline_sequence = environment.newline_sequence
+        self.keep_trailing_newline = environment.keep_trailing_newline
+
+        # global lexing rules
+        self.rules = {
+            "root": [
+                # directives
+                (
+                    c(
+                        "(.*?)(?:%s)"
+                        % "|".join(
+                            [
+                                r"(?P<raw_begin>%s(\-|\+|)\s*raw\s*(?:\-%s\s*|%s))"
+                                % (
+                                    e(environment.block_start_string),
+                                    e(environment.block_end_string),
+                                    e(environment.block_end_string),
+                                )
+                            ]
+                            + [
+                                r"(?P<%s>%s(\-|\+|))" % (n, r)
+                                for n, r in root_tag_rules
+                            ]
+                        )
+                    ),
+                    OptionalLStrip(TOKEN_DATA, "#bygroup"),
+                    "#bygroup",
+                ),
+                # data
+                (c(".+"), TOKEN_DATA, None),
+            ],
+            # comments
+            TOKEN_COMMENT_BEGIN: [
+                (
+                    c(
+                        r"(.*?)((?:\-%s\s*|%s)%s)"
+                        % (
+                            e(environment.comment_end_string),
+                            e(environment.comment_end_string),
+                            block_suffix_re,
+                        )
+                    ),
+                    (TOKEN_COMMENT, TOKEN_COMMENT_END),
+                    "#pop",
+                ),
+                (c("(.)"), (Failure("Missing end of comment tag"),), None),
+            ],
+            # blocks
+            TOKEN_BLOCK_BEGIN: [
+                (
+                    c(
+                        r"(?:\-%s\s*|%s)%s"
+                        % (
+                            e(environment.block_end_string),
+                            e(environment.block_end_string),
+                            block_suffix_re,
+                        )
+                    ),
+                    TOKEN_BLOCK_END,
+                    "#pop",
+                ),
+            ]
+            + tag_rules,
+            # variables
+            TOKEN_VARIABLE_BEGIN: [
+                (
+                    c(
+                        r"\-%s\s*|%s"
+                        % (
+                            e(environment.variable_end_string),
+                            e(environment.variable_end_string),
+                        )
+                    ),
+                    TOKEN_VARIABLE_END,
+                    "#pop",
+                )
+            ]
+            + tag_rules,
+            # raw block
+            TOKEN_RAW_BEGIN: [
+                (
+                    c(
+                        r"(.*?)((?:%s(\-|\+|))\s*endraw\s*(?:\-%s\s*|%s%s))"
+                        % (
+                            e(environment.block_start_string),
+                            e(environment.block_end_string),
+                            e(environment.block_end_string),
+                            block_suffix_re,
+                        )
+                    ),
+                    OptionalLStrip(TOKEN_DATA, TOKEN_RAW_END),
+                    "#pop",
+                ),
+                (c("(.)"), (Failure("Missing end of raw directive"),), None),
+            ],
+            # line statements
+            TOKEN_LINESTATEMENT_BEGIN: [
+                (c(r"\s*(\n|$)"), TOKEN_LINESTATEMENT_END, "#pop")
+            ]
+            + tag_rules,
+            # line comments
+            TOKEN_LINECOMMENT_BEGIN: [
+                (
+                    c(r"(.*?)()(?=\n|$)"),
+                    (TOKEN_LINECOMMENT, TOKEN_LINECOMMENT_END),
+                    "#pop",
+                )
+            ],
+        }
+
+    def _normalize_newlines(self, value):
+        """Called for strings and template data to normalize it to unicode."""
+        return newline_re.sub(self.newline_sequence, value)
+
+    def tokenize(self, source, name=None, filename=None, state=None):
+        """Calls tokeniter + tokenize and wraps it in a token stream."""
+        stream = self.tokeniter(source, name, filename, state)
+        return TokenStream(self.wrap(stream, name, filename), name, filename)
+
+    def wrap(self, stream, name=None, filename=None):
+        """This is called with the stream as returned by `tokenize` and wraps
+        every token in a :class:`Token` and converts the value.
+        """
+        for lineno, token, value in stream:
+            if token in ignored_tokens:
+                continue
+            elif token == TOKEN_LINESTATEMENT_BEGIN:
+                token = TOKEN_BLOCK_BEGIN
+            elif token == TOKEN_LINESTATEMENT_END:
+                token = TOKEN_BLOCK_END
+            # we are not interested in those tokens in the parser
+            elif token in (TOKEN_RAW_BEGIN, TOKEN_RAW_END):
+                continue
+            elif token == TOKEN_DATA:
+                value = self._normalize_newlines(value)
+            elif token == "keyword":
+                token = value
+            elif token == TOKEN_NAME:
+                value = str(value)
+                if check_ident and not value.isidentifier():
+                    raise TemplateSyntaxError(
+                        "Invalid character in identifier", lineno, name, filename
+                    )
+            elif token == TOKEN_STRING:
+                # try to unescape string
+                try:
+                    value = (
+                        self._normalize_newlines(value[1:-1])
+                        .encode("ascii", "backslashreplace")
+                        .decode("unicode-escape")
+                    )
+                except Exception as e:
+                    msg = str(e).split(":")[-1].strip()
+                    raise TemplateSyntaxError(msg, lineno, name, filename)
+            elif token == TOKEN_INTEGER:
+                value = int(value.replace("_", ""))
+            elif token == TOKEN_FLOAT:
+                # remove all "_" first to support more Python versions
+                value = literal_eval(value.replace("_", ""))
+            elif token == TOKEN_OPERATOR:
+                token = operators[value]
+            yield Token(lineno, token, value)
+
+    def tokeniter(self, source, name, filename=None, state=None):
+        """This method tokenizes the text and returns the tokens in a
+        generator.  Use this method if you just want to tokenize a template.
+        """
+        source = text_type(source)
+        lines = source.splitlines()
+        if self.keep_trailing_newline and source:
+            for newline in ("\r\n", "\r", "\n"):
+                if source.endswith(newline):
+                    lines.append("")
+                    break
+        source = "\n".join(lines)
+        pos = 0
+        lineno = 1
+        stack = ["root"]
+        if state is not None and state != "root":
+            assert state in ("variable", "block"), "invalid state"
+            stack.append(state + "_begin")
+        statetokens = self.rules[stack[-1]]
+        source_length = len(source)
+        balancing_stack = []
+        lstrip_unless_re = self.lstrip_unless_re
+        newlines_stripped = 0
+        line_starting = True
+
+        while 1:
+            # tokenizer loop
+            for regex, tokens, new_state in statetokens:
+                m = regex.match(source, pos)
+                # if no match we try again with the next rule
+                if m is None:
+                    continue
+
+                # we only match blocks and variables if braces / parentheses
+                # are balanced. continue parsing with the lower rule which
+                # is the operator rule. do this only if the end tags look
+                # like operators
+                if balancing_stack and tokens in (
+                    TOKEN_VARIABLE_END,
+                    TOKEN_BLOCK_END,
+                    TOKEN_LINESTATEMENT_END,
+                ):
+                    continue
+
+                # tuples support more options
+                if isinstance(tokens, tuple):
+                    groups = m.groups()
+
+                    if isinstance(tokens, OptionalLStrip):
+                        # Rule supports lstrip. Match will look like
+                        # text, block type, whitespace control, type, control, ...
+                        text = groups[0]
+
+                        # Skipping the text and first type, every other group is the
+                        # whitespace control for each type. One of the groups will be
+                        # -, +, or empty string instead of None.
+                        strip_sign = next(g for g in groups[2::2] if g is not None)
+
+                        if strip_sign == "-":
+                            # Strip all whitespace between the text and the tag.
+                            stripped = text.rstrip()
+                            newlines_stripped = text[len(stripped) :].count("\n")
+                            groups = (stripped,) + groups[1:]
+                        elif (
+                            # Not marked for preserving whitespace.
+                            strip_sign != "+"
+                            # lstrip is enabled.
+                            and lstrip_unless_re is not None
+                            # Not a variable expression.
+                            and not m.groupdict().get(TOKEN_VARIABLE_BEGIN)
+                        ):
+                            # The start of text between the last newline and the tag.
+                            l_pos = text.rfind("\n") + 1
+                            if l_pos > 0 or line_starting:
+                                # If there's only whitespace between the newline and the
+                                # tag, strip it.
+                                if not lstrip_unless_re.search(text, l_pos):
+                                    groups = (text[:l_pos],) + groups[1:]
+
+                    for idx, token in enumerate(tokens):
+                        # failure group
+                        if token.__class__ is Failure:
+                            raise token(lineno, filename)
+                        # bygroup is a bit more complex, in that case we
+                        # yield for the current token the first named
+                        # group that matched
+                        elif token == "#bygroup":
+                            for key, value in iteritems(m.groupdict()):
+                                if value is not None:
+                                    yield lineno, key, value
+                                    lineno += value.count("\n")
+                                    break
+                            else:
+                                raise RuntimeError(
+                                    "%r wanted to resolve "
+                                    "the token dynamically"
+                                    " but no group matched" % regex
+                                )
+                        # normal group
+                        else:
+                            data = groups[idx]
+                            if data or token not in ignore_if_empty:
+                                yield lineno, token, data
+                            lineno += data.count("\n") + newlines_stripped
+                            newlines_stripped = 0
+
+                # strings as token just are yielded as it.
+                else:
+                    data = m.group()
+                    # update brace/parentheses balance
+                    if tokens == TOKEN_OPERATOR:
+                        if data == "{":
+                            balancing_stack.append("}")
+                        elif data == "(":
+                            balancing_stack.append(")")
+                        elif data == "[":
+                            balancing_stack.append("]")
+                        elif data in ("}", ")", "]"):
+                            if not balancing_stack:
+                                raise TemplateSyntaxError(
+                                    "unexpected '%s'" % data, lineno, name, filename
+                                )
+                            expected_op = balancing_stack.pop()
+                            if expected_op != data:
+                                raise TemplateSyntaxError(
+                                    "unexpected '%s', "
+                                    "expected '%s'" % (data, expected_op),
+                                    lineno,
+                                    name,
+                                    filename,
+                                )
+                    # yield items
+                    if data or tokens not in ignore_if_empty:
+                        yield lineno, tokens, data
+                    lineno += data.count("\n")
+
+                line_starting = m.group()[-1:] == "\n"
+
+                # fetch new position into new variable so that we can check
+                # if there is a internal parsing error which would result
+                # in an infinite loop
+                pos2 = m.end()
+
+                # handle state changes
+                if new_state is not None:
+                    # remove the uppermost state
+                    if new_state == "#pop":
+                        stack.pop()
+                    # resolve the new state by group checking
+                    elif new_state == "#bygroup":
+                        for key, value in iteritems(m.groupdict()):
+                            if value is not None:
+                                stack.append(key)
+                                break
+                        else:
+                            raise RuntimeError(
+                                "%r wanted to resolve the "
+                                "new state dynamically but"
+                                " no group matched" % regex
+                            )
+                    # direct state name given
+                    else:
+                        stack.append(new_state)
+                    statetokens = self.rules[stack[-1]]
+                # we are still at the same position and no stack change.
+                # this means a loop without break condition, avoid that and
+                # raise error
+                elif pos2 == pos:
+                    raise RuntimeError(
+                        "%r yielded empty string without stack change" % regex
+                    )
+                # publish new function and start again
+                pos = pos2
+                break
+            # if loop terminated without break we haven't found a single match
+            # either we are at the end of the file or we have a problem
+            else:
+                # end of text
+                if pos >= source_length:
+                    return
+                # something went wrong
+                raise TemplateSyntaxError(
+                    "unexpected char %r at %d" % (source[pos], pos),
+                    lineno,
+                    name,
+                    filename,
+                )
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/loaders.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/loaders.py
new file mode 100644
index 0000000..457c4b5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/loaders.py
@@ -0,0 +1,504 @@
+# -*- coding: utf-8 -*-
+"""API and implementations for loading templates from different data
+sources.
+"""
+import os
+import sys
+import weakref
+from hashlib import sha1
+from os import path
+from types import ModuleType
+
+from ._compat import abc
+from ._compat import fspath
+from ._compat import iteritems
+from ._compat import string_types
+from .exceptions import TemplateNotFound
+from .utils import internalcode
+from .utils import open_if_exists
+
+
+def split_template_path(template):
+    """Split a path into segments and perform a sanity check.  If it detects
+    '..' in the path it will raise a `TemplateNotFound` error.
+    """
+    pieces = []
+    for piece in template.split("/"):
+        if (
+            path.sep in piece
+            or (path.altsep and path.altsep in piece)
+            or piece == path.pardir
+        ):
+            raise TemplateNotFound(template)
+        elif piece and piece != ".":
+            pieces.append(piece)
+    return pieces
+
+
+class BaseLoader(object):
+    """Baseclass for all loaders.  Subclass this and override `get_source` to
+    implement a custom loading mechanism.  The environment provides a
+    `get_template` method that calls the loader's `load` method to get the
+    :class:`Template` object.
+
+    A very basic example for a loader that looks up templates on the file
+    system could look like this::
+
+        from jinja2 import BaseLoader, TemplateNotFound
+        from os.path import join, exists, getmtime
+
+        class MyLoader(BaseLoader):
+
+            def __init__(self, path):
+                self.path = path
+
+            def get_source(self, environment, template):
+                path = join(self.path, template)
+                if not exists(path):
+                    raise TemplateNotFound(template)
+                mtime = getmtime(path)
+                with file(path) as f:
+                    source = f.read().decode('utf-8')
+                return source, path, lambda: mtime == getmtime(path)
+    """
+
+    #: if set to `False` it indicates that the loader cannot provide access
+    #: to the source of templates.
+    #:
+    #: .. versionadded:: 2.4
+    has_source_access = True
+
+    def get_source(self, environment, template):
+        """Get the template source, filename and reload helper for a template.
+        It's passed the environment and template name and has to return a
+        tuple in the form ``(source, filename, uptodate)`` or raise a
+        `TemplateNotFound` error if it can't locate the template.
+
+        The source part of the returned tuple must be the source of the
+        template as unicode string or a ASCII bytestring.  The filename should
+        be the name of the file on the filesystem if it was loaded from there,
+        otherwise `None`.  The filename is used by python for the tracebacks
+        if no loader extension is used.
+
+        The last item in the tuple is the `uptodate` function.  If auto
+        reloading is enabled it's always called to check if the template
+        changed.  No arguments are passed so the function must store the
+        old state somewhere (for example in a closure).  If it returns `False`
+        the template will be reloaded.
+        """
+        if not self.has_source_access:
+            raise RuntimeError(
+                "%s cannot provide access to the source" % self.__class__.__name__
+            )
+        raise TemplateNotFound(template)
+
+    def list_templates(self):
+        """Iterates over all templates.  If the loader does not support that
+        it should raise a :exc:`TypeError` which is the default behavior.
+        """
+        raise TypeError("this loader cannot iterate over all templates")
+
+    @internalcode
+    def load(self, environment, name, globals=None):
+        """Loads a template.  This method looks up the template in the cache
+        or loads one by calling :meth:`get_source`.  Subclasses should not
+        override this method as loaders working on collections of other
+        loaders (such as :class:`PrefixLoader` or :class:`ChoiceLoader`)
+        will not call this method but `get_source` directly.
+        """
+        code = None
+        if globals is None:
+            globals = {}
+
+        # first we try to get the source for this template together
+        # with the filename and the uptodate function.
+        source, filename, uptodate = self.get_source(environment, name)
+
+        # try to load the code from the bytecode cache if there is a
+        # bytecode cache configured.
+        bcc = environment.bytecode_cache
+        if bcc is not None:
+            bucket = bcc.get_bucket(environment, name, filename, source)
+            code = bucket.code
+
+        # if we don't have code so far (not cached, no longer up to
+        # date) etc. we compile the template
+        if code is None:
+            code = environment.compile(source, name, filename)
+
+        # if the bytecode cache is available and the bucket doesn't
+        # have a code so far, we give the bucket the new code and put
+        # it back to the bytecode cache.
+        if bcc is not None and bucket.code is None:
+            bucket.code = code
+            bcc.set_bucket(bucket)
+
+        return environment.template_class.from_code(
+            environment, code, globals, uptodate
+        )
+
+
+class FileSystemLoader(BaseLoader):
+    """Loads templates from the file system.  This loader can find templates
+    in folders on the file system and is the preferred way to load them.
+
+    The loader takes the path to the templates as string, or if multiple
+    locations are wanted a list of them which is then looked up in the
+    given order::
+
+    >>> loader = FileSystemLoader('/path/to/templates')
+    >>> loader = FileSystemLoader(['/path/to/templates', '/other/path'])
+
+    Per default the template encoding is ``'utf-8'`` which can be changed
+    by setting the `encoding` parameter to something else.
+
+    To follow symbolic links, set the *followlinks* parameter to ``True``::
+
+    >>> loader = FileSystemLoader('/path/to/templates', followlinks=True)
+
+    .. versionchanged:: 2.8
+       The ``followlinks`` parameter was added.
+    """
+
+    def __init__(self, searchpath, encoding="utf-8", followlinks=False):
+        if not isinstance(searchpath, abc.Iterable) or isinstance(
+            searchpath, string_types
+        ):
+            searchpath = [searchpath]
+
+        # In Python 3.5, os.path.join doesn't support Path. This can be
+        # simplified to list(searchpath) when Python 3.5 is dropped.
+        self.searchpath = [fspath(p) for p in searchpath]
+
+        self.encoding = encoding
+        self.followlinks = followlinks
+
+    def get_source(self, environment, template):
+        pieces = split_template_path(template)
+        for searchpath in self.searchpath:
+            filename = path.join(searchpath, *pieces)
+            f = open_if_exists(filename)
+            if f is None:
+                continue
+            try:
+                contents = f.read().decode(self.encoding)
+            finally:
+                f.close()
+
+            mtime = path.getmtime(filename)
+
+            def uptodate():
+                try:
+                    return path.getmtime(filename) == mtime
+                except OSError:
+                    return False
+
+            return contents, filename, uptodate
+        raise TemplateNotFound(template)
+
+    def list_templates(self):
+        found = set()
+        for searchpath in self.searchpath:
+            walk_dir = os.walk(searchpath, followlinks=self.followlinks)
+            for dirpath, _, filenames in walk_dir:
+                for filename in filenames:
+                    template = (
+                        os.path.join(dirpath, filename)[len(searchpath) :]
+                        .strip(os.path.sep)
+                        .replace(os.path.sep, "/")
+                    )
+                    if template[:2] == "./":
+                        template = template[2:]
+                    if template not in found:
+                        found.add(template)
+        return sorted(found)
+
+
+class PackageLoader(BaseLoader):
+    """Load templates from python eggs or packages.  It is constructed with
+    the name of the python package and the path to the templates in that
+    package::
+
+        loader = PackageLoader('mypackage', 'views')
+
+    If the package path is not given, ``'templates'`` is assumed.
+
+    Per default the template encoding is ``'utf-8'`` which can be changed
+    by setting the `encoding` parameter to something else.  Due to the nature
+    of eggs it's only possible to reload templates if the package was loaded
+    from the file system and not a zip file.
+    """
+
+    def __init__(self, package_name, package_path="templates", encoding="utf-8"):
+        from pkg_resources import DefaultProvider
+        from pkg_resources import get_provider
+        from pkg_resources import ResourceManager
+
+        provider = get_provider(package_name)
+        self.encoding = encoding
+        self.manager = ResourceManager()
+        self.filesystem_bound = isinstance(provider, DefaultProvider)
+        self.provider = provider
+        self.package_path = package_path
+
+    def get_source(self, environment, template):
+        pieces = split_template_path(template)
+        p = "/".join((self.package_path,) + tuple(pieces))
+
+        if not self.provider.has_resource(p):
+            raise TemplateNotFound(template)
+
+        filename = uptodate = None
+
+        if self.filesystem_bound:
+            filename = self.provider.get_resource_filename(self.manager, p)
+            mtime = path.getmtime(filename)
+
+            def uptodate():
+                try:
+                    return path.getmtime(filename) == mtime
+                except OSError:
+                    return False
+
+        source = self.provider.get_resource_string(self.manager, p)
+        return source.decode(self.encoding), filename, uptodate
+
+    def list_templates(self):
+        path = self.package_path
+
+        if path[:2] == "./":
+            path = path[2:]
+        elif path == ".":
+            path = ""
+
+        offset = len(path)
+        results = []
+
+        def _walk(path):
+            for filename in self.provider.resource_listdir(path):
+                fullname = path + "/" + filename
+
+                if self.provider.resource_isdir(fullname):
+                    _walk(fullname)
+                else:
+                    results.append(fullname[offset:].lstrip("/"))
+
+        _walk(path)
+        results.sort()
+        return results
+
+
+class DictLoader(BaseLoader):
+    """Loads a template from a python dict.  It's passed a dict of unicode
+    strings bound to template names.  This loader is useful for unittesting:
+
+    >>> loader = DictLoader({'index.html': 'source here'})
+
+    Because auto reloading is rarely useful this is disabled per default.
+    """
+
+    def __init__(self, mapping):
+        self.mapping = mapping
+
+    def get_source(self, environment, template):
+        if template in self.mapping:
+            source = self.mapping[template]
+            return source, None, lambda: source == self.mapping.get(template)
+        raise TemplateNotFound(template)
+
+    def list_templates(self):
+        return sorted(self.mapping)
+
+
+class FunctionLoader(BaseLoader):
+    """A loader that is passed a function which does the loading.  The
+    function receives the name of the template and has to return either
+    an unicode string with the template source, a tuple in the form ``(source,
+    filename, uptodatefunc)`` or `None` if the template does not exist.
+
+    >>> def load_template(name):
+    ...     if name == 'index.html':
+    ...         return '...'
+    ...
+    >>> loader = FunctionLoader(load_template)
+
+    The `uptodatefunc` is a function that is called if autoreload is enabled
+    and has to return `True` if the template is still up to date.  For more
+    details have a look at :meth:`BaseLoader.get_source` which has the same
+    return value.
+    """
+
+    def __init__(self, load_func):
+        self.load_func = load_func
+
+    def get_source(self, environment, template):
+        rv = self.load_func(template)
+        if rv is None:
+            raise TemplateNotFound(template)
+        elif isinstance(rv, string_types):
+            return rv, None, None
+        return rv
+
+
+class PrefixLoader(BaseLoader):
+    """A loader that is passed a dict of loaders where each loader is bound
+    to a prefix.  The prefix is delimited from the template by a slash per
+    default, which can be changed by setting the `delimiter` argument to
+    something else::
+
+        loader = PrefixLoader({
+            'app1':     PackageLoader('mypackage.app1'),
+            'app2':     PackageLoader('mypackage.app2')
+        })
+
+    By loading ``'app1/index.html'`` the file from the app1 package is loaded,
+    by loading ``'app2/index.html'`` the file from the second.
+    """
+
+    def __init__(self, mapping, delimiter="/"):
+        self.mapping = mapping
+        self.delimiter = delimiter
+
+    def get_loader(self, template):
+        try:
+            prefix, name = template.split(self.delimiter, 1)
+            loader = self.mapping[prefix]
+        except (ValueError, KeyError):
+            raise TemplateNotFound(template)
+        return loader, name
+
+    def get_source(self, environment, template):
+        loader, name = self.get_loader(template)
+        try:
+            return loader.get_source(environment, name)
+        except TemplateNotFound:
+            # re-raise the exception with the correct filename here.
+            # (the one that includes the prefix)
+            raise TemplateNotFound(template)
+
+    @internalcode
+    def load(self, environment, name, globals=None):
+        loader, local_name = self.get_loader(name)
+        try:
+            return loader.load(environment, local_name, globals)
+        except TemplateNotFound:
+            # re-raise the exception with the correct filename here.
+            # (the one that includes the prefix)
+            raise TemplateNotFound(name)
+
+    def list_templates(self):
+        result = []
+        for prefix, loader in iteritems(self.mapping):
+            for template in loader.list_templates():
+                result.append(prefix + self.delimiter + template)
+        return result
+
+
+class ChoiceLoader(BaseLoader):
+    """This loader works like the `PrefixLoader` just that no prefix is
+    specified.  If a template could not be found by one loader the next one
+    is tried.
+
+    >>> loader = ChoiceLoader([
+    ...     FileSystemLoader('/path/to/user/templates'),
+    ...     FileSystemLoader('/path/to/system/templates')
+    ... ])
+
+    This is useful if you want to allow users to override builtin templates
+    from a different location.
+    """
+
+    def __init__(self, loaders):
+        self.loaders = loaders
+
+    def get_source(self, environment, template):
+        for loader in self.loaders:
+            try:
+                return loader.get_source(environment, template)
+            except TemplateNotFound:
+                pass
+        raise TemplateNotFound(template)
+
+    @internalcode
+    def load(self, environment, name, globals=None):
+        for loader in self.loaders:
+            try:
+                return loader.load(environment, name, globals)
+            except TemplateNotFound:
+                pass
+        raise TemplateNotFound(name)
+
+    def list_templates(self):
+        found = set()
+        for loader in self.loaders:
+            found.update(loader.list_templates())
+        return sorted(found)
+
+
+class _TemplateModule(ModuleType):
+    """Like a normal module but with support for weak references"""
+
+
+class ModuleLoader(BaseLoader):
+    """This loader loads templates from precompiled templates.
+
+    Example usage:
+
+    >>> loader = ChoiceLoader([
+    ...     ModuleLoader('/path/to/compiled/templates'),
+    ...     FileSystemLoader('/path/to/templates')
+    ... ])
+
+    Templates can be precompiled with :meth:`Environment.compile_templates`.
+    """
+
+    has_source_access = False
+
+    def __init__(self, path):
+        package_name = "_jinja2_module_templates_%x" % id(self)
+
+        # create a fake module that looks for the templates in the
+        # path given.
+        mod = _TemplateModule(package_name)
+
+        if not isinstance(path, abc.Iterable) or isinstance(path, string_types):
+            path = [path]
+
+        mod.__path__ = [fspath(p) for p in path]
+
+        sys.modules[package_name] = weakref.proxy(
+            mod, lambda x: sys.modules.pop(package_name, None)
+        )
+
+        # the only strong reference, the sys.modules entry is weak
+        # so that the garbage collector can remove it once the
+        # loader that created it goes out of business.
+        self.module = mod
+        self.package_name = package_name
+
+    @staticmethod
+    def get_template_key(name):
+        return "tmpl_" + sha1(name.encode("utf-8")).hexdigest()
+
+    @staticmethod
+    def get_module_filename(name):
+        return ModuleLoader.get_template_key(name) + ".py"
+
+    @internalcode
+    def load(self, environment, name, globals=None):
+        key = self.get_template_key(name)
+        module = "%s.%s" % (self.package_name, key)
+        mod = getattr(self.module, module, None)
+        if mod is None:
+            try:
+                mod = __import__(module, None, None, ["root"])
+            except ImportError:
+                raise TemplateNotFound(name)
+
+            # remove the entry from sys.modules, we only want the attribute
+            # on the module object we have stored on the loader.
+            sys.modules.pop(module, None)
+
+        return environment.template_class.from_module_dict(
+            environment, mod.__dict__, globals
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/meta.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/meta.py
new file mode 100644
index 0000000..3795aac
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/meta.py
@@ -0,0 +1,101 @@
+# -*- coding: utf-8 -*-
+"""Functions that expose information about templates that might be
+interesting for introspection.
+"""
+from . import nodes
+from ._compat import iteritems
+from ._compat import string_types
+from .compiler import CodeGenerator
+
+
+class TrackingCodeGenerator(CodeGenerator):
+    """We abuse the code generator for introspection."""
+
+    def __init__(self, environment):
+        CodeGenerator.__init__(self, environment, "<introspection>", "<introspection>")
+        self.undeclared_identifiers = set()
+
+    def write(self, x):
+        """Don't write."""
+
+    def enter_frame(self, frame):
+        """Remember all undeclared identifiers."""
+        CodeGenerator.enter_frame(self, frame)
+        for _, (action, param) in iteritems(frame.symbols.loads):
+            if action == "resolve" and param not in self.environment.globals:
+                self.undeclared_identifiers.add(param)
+
+
+def find_undeclared_variables(ast):
+    """Returns a set of all variables in the AST that will be looked up from
+    the context at runtime.  Because at compile time it's not known which
+    variables will be used depending on the path the execution takes at
+    runtime, all variables are returned.
+
+    >>> from jinja2 import Environment, meta
+    >>> env = Environment()
+    >>> ast = env.parse('{% set foo = 42 %}{{ bar + foo }}')
+    >>> meta.find_undeclared_variables(ast) == set(['bar'])
+    True
+
+    .. admonition:: Implementation
+
+       Internally the code generator is used for finding undeclared variables.
+       This is good to know because the code generator might raise a
+       :exc:`TemplateAssertionError` during compilation and as a matter of
+       fact this function can currently raise that exception as well.
+    """
+    codegen = TrackingCodeGenerator(ast.environment)
+    codegen.visit(ast)
+    return codegen.undeclared_identifiers
+
+
+def find_referenced_templates(ast):
+    """Finds all the referenced templates from the AST.  This will return an
+    iterator over all the hardcoded template extensions, inclusions and
+    imports.  If dynamic inheritance or inclusion is used, `None` will be
+    yielded.
+
+    >>> from jinja2 import Environment, meta
+    >>> env = Environment()
+    >>> ast = env.parse('{% extends "layout.html" %}{% include helper %}')
+    >>> list(meta.find_referenced_templates(ast))
+    ['layout.html', None]
+
+    This function is useful for dependency tracking.  For example if you want
+    to rebuild parts of the website after a layout template has changed.
+    """
+    for node in ast.find_all(
+        (nodes.Extends, nodes.FromImport, nodes.Import, nodes.Include)
+    ):
+        if not isinstance(node.template, nodes.Const):
+            # a tuple with some non consts in there
+            if isinstance(node.template, (nodes.Tuple, nodes.List)):
+                for template_name in node.template.items:
+                    # something const, only yield the strings and ignore
+                    # non-string consts that really just make no sense
+                    if isinstance(template_name, nodes.Const):
+                        if isinstance(template_name.value, string_types):
+                            yield template_name.value
+                    # something dynamic in there
+                    else:
+                        yield None
+            # something dynamic we don't know about here
+            else:
+                yield None
+            continue
+        # constant is a basestring, direct template name
+        if isinstance(node.template.value, string_types):
+            yield node.template.value
+        # a tuple or list (latter *should* not happen) made of consts,
+        # yield the consts that are strings.  We could warn here for
+        # non string values
+        elif isinstance(node, nodes.Include) and isinstance(
+            node.template.value, (tuple, list)
+        ):
+            for template_name in node.template.value:
+                if isinstance(template_name, string_types):
+                    yield template_name
+        # something else we don't care about, we could warn here
+        else:
+            yield None
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/nativetypes.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/nativetypes.py
new file mode 100644
index 0000000..a9ead4e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/nativetypes.py
@@ -0,0 +1,94 @@
+from ast import literal_eval
+from itertools import chain
+from itertools import islice
+
+from . import nodes
+from ._compat import text_type
+from .compiler import CodeGenerator
+from .compiler import has_safe_repr
+from .environment import Environment
+from .environment import Template
+
+
+def native_concat(nodes):
+    """Return a native Python type from the list of compiled nodes. If
+    the result is a single node, its value is returned. Otherwise, the
+    nodes are concatenated as strings. If the result can be parsed with
+    :func:`ast.literal_eval`, the parsed value is returned. Otherwise,
+    the string is returned.
+
+    :param nodes: Iterable of nodes to concatenate.
+    """
+    head = list(islice(nodes, 2))
+
+    if not head:
+        return None
+
+    if len(head) == 1:
+        raw = head[0]
+    else:
+        raw = u"".join([text_type(v) for v in chain(head, nodes)])
+
+    try:
+        return literal_eval(raw)
+    except (ValueError, SyntaxError, MemoryError):
+        return raw
+
+
+class NativeCodeGenerator(CodeGenerator):
+    """A code generator which renders Python types by not adding
+    ``to_string()`` around output nodes.
+    """
+
+    @staticmethod
+    def _default_finalize(value):
+        return value
+
+    def _output_const_repr(self, group):
+        return repr(u"".join([text_type(v) for v in group]))
+
+    def _output_child_to_const(self, node, frame, finalize):
+        const = node.as_const(frame.eval_ctx)
+
+        if not has_safe_repr(const):
+            raise nodes.Impossible()
+
+        if isinstance(node, nodes.TemplateData):
+            return const
+
+        return finalize.const(const)
+
+    def _output_child_pre(self, node, frame, finalize):
+        if finalize.src is not None:
+            self.write(finalize.src)
+
+    def _output_child_post(self, node, frame, finalize):
+        if finalize.src is not None:
+            self.write(")")
+
+
+class NativeEnvironment(Environment):
+    """An environment that renders templates to native Python types."""
+
+    code_generator_class = NativeCodeGenerator
+
+
+class NativeTemplate(Template):
+    environment_class = NativeEnvironment
+
+    def render(self, *args, **kwargs):
+        """Render the template to produce a native Python type. If the
+        result is a single node, its value is returned. Otherwise, the
+        nodes are concatenated as strings. If the result can be parsed
+        with :func:`ast.literal_eval`, the parsed value is returned.
+        Otherwise, the string is returned.
+        """
+        vars = dict(*args, **kwargs)
+
+        try:
+            return native_concat(self.root_render_func(self.new_context(vars)))
+        except Exception:
+            return self.environment.handle_exception()
+
+
+NativeEnvironment.template_class = NativeTemplate
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/nodes.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/nodes.py
new file mode 100644
index 0000000..95bd614
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/nodes.py
@@ -0,0 +1,1088 @@
+# -*- coding: utf-8 -*-
+"""AST nodes generated by the parser for the compiler. Also provides
+some node tree helper functions used by the parser and compiler in order
+to normalize nodes.
+"""
+import operator
+from collections import deque
+
+from markupsafe import Markup
+
+from ._compat import izip
+from ._compat import PY2
+from ._compat import text_type
+from ._compat import with_metaclass
+
+_binop_to_func = {
+    "*": operator.mul,
+    "/": operator.truediv,
+    "//": operator.floordiv,
+    "**": operator.pow,
+    "%": operator.mod,
+    "+": operator.add,
+    "-": operator.sub,
+}
+
+_uaop_to_func = {"not": operator.not_, "+": operator.pos, "-": operator.neg}
+
+_cmpop_to_func = {
+    "eq": operator.eq,
+    "ne": operator.ne,
+    "gt": operator.gt,
+    "gteq": operator.ge,
+    "lt": operator.lt,
+    "lteq": operator.le,
+    "in": lambda a, b: a in b,
+    "notin": lambda a, b: a not in b,
+}
+
+
+class Impossible(Exception):
+    """Raised if the node could not perform a requested action."""
+
+
+class NodeType(type):
+    """A metaclass for nodes that handles the field and attribute
+    inheritance.  fields and attributes from the parent class are
+    automatically forwarded to the child."""
+
+    def __new__(mcs, name, bases, d):
+        for attr in "fields", "attributes":
+            storage = []
+            storage.extend(getattr(bases[0], attr, ()))
+            storage.extend(d.get(attr, ()))
+            assert len(bases) == 1, "multiple inheritance not allowed"
+            assert len(storage) == len(set(storage)), "layout conflict"
+            d[attr] = tuple(storage)
+        d.setdefault("abstract", False)
+        return type.__new__(mcs, name, bases, d)
+
+
+class EvalContext(object):
+    """Holds evaluation time information.  Custom attributes can be attached
+    to it in extensions.
+    """
+
+    def __init__(self, environment, template_name=None):
+        self.environment = environment
+        if callable(environment.autoescape):
+            self.autoescape = environment.autoescape(template_name)
+        else:
+            self.autoescape = environment.autoescape
+        self.volatile = False
+
+    def save(self):
+        return self.__dict__.copy()
+
+    def revert(self, old):
+        self.__dict__.clear()
+        self.__dict__.update(old)
+
+
+def get_eval_context(node, ctx):
+    if ctx is None:
+        if node.environment is None:
+            raise RuntimeError(
+                "if no eval context is passed, the "
+                "node must have an attached "
+                "environment."
+            )
+        return EvalContext(node.environment)
+    return ctx
+
+
+class Node(with_metaclass(NodeType, object)):
+    """Baseclass for all Jinja nodes.  There are a number of nodes available
+    of different types.  There are four major types:
+
+    -   :class:`Stmt`: statements
+    -   :class:`Expr`: expressions
+    -   :class:`Helper`: helper nodes
+    -   :class:`Template`: the outermost wrapper node
+
+    All nodes have fields and attributes.  Fields may be other nodes, lists,
+    or arbitrary values.  Fields are passed to the constructor as regular
+    positional arguments, attributes as keyword arguments.  Each node has
+    two attributes: `lineno` (the line number of the node) and `environment`.
+    The `environment` attribute is set at the end of the parsing process for
+    all nodes automatically.
+    """
+
+    fields = ()
+    attributes = ("lineno", "environment")
+    abstract = True
+
+    def __init__(self, *fields, **attributes):
+        if self.abstract:
+            raise TypeError("abstract nodes are not instantiable")
+        if fields:
+            if len(fields) != len(self.fields):
+                if not self.fields:
+                    raise TypeError("%r takes 0 arguments" % self.__class__.__name__)
+                raise TypeError(
+                    "%r takes 0 or %d argument%s"
+                    % (
+                        self.__class__.__name__,
+                        len(self.fields),
+                        len(self.fields) != 1 and "s" or "",
+                    )
+                )
+            for name, arg in izip(self.fields, fields):
+                setattr(self, name, arg)
+        for attr in self.attributes:
+            setattr(self, attr, attributes.pop(attr, None))
+        if attributes:
+            raise TypeError("unknown attribute %r" % next(iter(attributes)))
+
+    def iter_fields(self, exclude=None, only=None):
+        """This method iterates over all fields that are defined and yields
+        ``(key, value)`` tuples.  Per default all fields are returned, but
+        it's possible to limit that to some fields by providing the `only`
+        parameter or to exclude some using the `exclude` parameter.  Both
+        should be sets or tuples of field names.
+        """
+        for name in self.fields:
+            if (
+                (exclude is only is None)
+                or (exclude is not None and name not in exclude)
+                or (only is not None and name in only)
+            ):
+                try:
+                    yield name, getattr(self, name)
+                except AttributeError:
+                    pass
+
+    def iter_child_nodes(self, exclude=None, only=None):
+        """Iterates over all direct child nodes of the node.  This iterates
+        over all fields and yields the values of they are nodes.  If the value
+        of a field is a list all the nodes in that list are returned.
+        """
+        for _, item in self.iter_fields(exclude, only):
+            if isinstance(item, list):
+                for n in item:
+                    if isinstance(n, Node):
+                        yield n
+            elif isinstance(item, Node):
+                yield item
+
+    def find(self, node_type):
+        """Find the first node of a given type.  If no such node exists the
+        return value is `None`.
+        """
+        for result in self.find_all(node_type):
+            return result
+
+    def find_all(self, node_type):
+        """Find all the nodes of a given type.  If the type is a tuple,
+        the check is performed for any of the tuple items.
+        """
+        for child in self.iter_child_nodes():
+            if isinstance(child, node_type):
+                yield child
+            for result in child.find_all(node_type):
+                yield result
+
+    def set_ctx(self, ctx):
+        """Reset the context of a node and all child nodes.  Per default the
+        parser will all generate nodes that have a 'load' context as it's the
+        most common one.  This method is used in the parser to set assignment
+        targets and other nodes to a store context.
+        """
+        todo = deque([self])
+        while todo:
+            node = todo.popleft()
+            if "ctx" in node.fields:
+                node.ctx = ctx
+            todo.extend(node.iter_child_nodes())
+        return self
+
+    def set_lineno(self, lineno, override=False):
+        """Set the line numbers of the node and children."""
+        todo = deque([self])
+        while todo:
+            node = todo.popleft()
+            if "lineno" in node.attributes:
+                if node.lineno is None or override:
+                    node.lineno = lineno
+            todo.extend(node.iter_child_nodes())
+        return self
+
+    def set_environment(self, environment):
+        """Set the environment for all nodes."""
+        todo = deque([self])
+        while todo:
+            node = todo.popleft()
+            node.environment = environment
+            todo.extend(node.iter_child_nodes())
+        return self
+
+    def __eq__(self, other):
+        return type(self) is type(other) and tuple(self.iter_fields()) == tuple(
+            other.iter_fields()
+        )
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    # Restore Python 2 hashing behavior on Python 3
+    __hash__ = object.__hash__
+
+    def __repr__(self):
+        return "%s(%s)" % (
+            self.__class__.__name__,
+            ", ".join("%s=%r" % (arg, getattr(self, arg, None)) for arg in self.fields),
+        )
+
+    def dump(self):
+        def _dump(node):
+            if not isinstance(node, Node):
+                buf.append(repr(node))
+                return
+
+            buf.append("nodes.%s(" % node.__class__.__name__)
+            if not node.fields:
+                buf.append(")")
+                return
+            for idx, field in enumerate(node.fields):
+                if idx:
+                    buf.append(", ")
+                value = getattr(node, field)
+                if isinstance(value, list):
+                    buf.append("[")
+                    for idx, item in enumerate(value):
+                        if idx:
+                            buf.append(", ")
+                        _dump(item)
+                    buf.append("]")
+                else:
+                    _dump(value)
+            buf.append(")")
+
+        buf = []
+        _dump(self)
+        return "".join(buf)
+
+
+class Stmt(Node):
+    """Base node for all statements."""
+
+    abstract = True
+
+
+class Helper(Node):
+    """Nodes that exist in a specific context only."""
+
+    abstract = True
+
+
+class Template(Node):
+    """Node that represents a template.  This must be the outermost node that
+    is passed to the compiler.
+    """
+
+    fields = ("body",)
+
+
+class Output(Stmt):
+    """A node that holds multiple expressions which are then printed out.
+    This is used both for the `print` statement and the regular template data.
+    """
+
+    fields = ("nodes",)
+
+
+class Extends(Stmt):
+    """Represents an extends statement."""
+
+    fields = ("template",)
+
+
+class For(Stmt):
+    """The for loop.  `target` is the target for the iteration (usually a
+    :class:`Name` or :class:`Tuple`), `iter` the iterable.  `body` is a list
+    of nodes that are used as loop-body, and `else_` a list of nodes for the
+    `else` block.  If no else node exists it has to be an empty list.
+
+    For filtered nodes an expression can be stored as `test`, otherwise `None`.
+    """
+
+    fields = ("target", "iter", "body", "else_", "test", "recursive")
+
+
+class If(Stmt):
+    """If `test` is true, `body` is rendered, else `else_`."""
+
+    fields = ("test", "body", "elif_", "else_")
+
+
+class Macro(Stmt):
+    """A macro definition.  `name` is the name of the macro, `args` a list of
+    arguments and `defaults` a list of defaults if there are any.  `body` is
+    a list of nodes for the macro body.
+    """
+
+    fields = ("name", "args", "defaults", "body")
+
+
+class CallBlock(Stmt):
+    """Like a macro without a name but a call instead.  `call` is called with
+    the unnamed macro as `caller` argument this node holds.
+    """
+
+    fields = ("call", "args", "defaults", "body")
+
+
+class FilterBlock(Stmt):
+    """Node for filter sections."""
+
+    fields = ("body", "filter")
+
+
+class With(Stmt):
+    """Specific node for with statements.  In older versions of Jinja the
+    with statement was implemented on the base of the `Scope` node instead.
+
+    .. versionadded:: 2.9.3
+    """
+
+    fields = ("targets", "values", "body")
+
+
+class Block(Stmt):
+    """A node that represents a block."""
+
+    fields = ("name", "body", "scoped")
+
+
+class Include(Stmt):
+    """A node that represents the include tag."""
+
+    fields = ("template", "with_context", "ignore_missing")
+
+
+class Import(Stmt):
+    """A node that represents the import tag."""
+
+    fields = ("template", "target", "with_context")
+
+
+class FromImport(Stmt):
+    """A node that represents the from import tag.  It's important to not
+    pass unsafe names to the name attribute.  The compiler translates the
+    attribute lookups directly into getattr calls and does *not* use the
+    subscript callback of the interface.  As exported variables may not
+    start with double underscores (which the parser asserts) this is not a
+    problem for regular Jinja code, but if this node is used in an extension
+    extra care must be taken.
+
+    The list of names may contain tuples if aliases are wanted.
+    """
+
+    fields = ("template", "names", "with_context")
+
+
+class ExprStmt(Stmt):
+    """A statement that evaluates an expression and discards the result."""
+
+    fields = ("node",)
+
+
+class Assign(Stmt):
+    """Assigns an expression to a target."""
+
+    fields = ("target", "node")
+
+
+class AssignBlock(Stmt):
+    """Assigns a block to a target."""
+
+    fields = ("target", "filter", "body")
+
+
+class Expr(Node):
+    """Baseclass for all expressions."""
+
+    abstract = True
+
+    def as_const(self, eval_ctx=None):
+        """Return the value of the expression as constant or raise
+        :exc:`Impossible` if this was not possible.
+
+        An :class:`EvalContext` can be provided, if none is given
+        a default context is created which requires the nodes to have
+        an attached environment.
+
+        .. versionchanged:: 2.4
+           the `eval_ctx` parameter was added.
+        """
+        raise Impossible()
+
+    def can_assign(self):
+        """Check if it's possible to assign something to this node."""
+        return False
+
+
+class BinExpr(Expr):
+    """Baseclass for all binary expressions."""
+
+    fields = ("left", "right")
+    operator = None
+    abstract = True
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        # intercepted operators cannot be folded at compile time
+        if (
+            self.environment.sandboxed
+            and self.operator in self.environment.intercepted_binops
+        ):
+            raise Impossible()
+        f = _binop_to_func[self.operator]
+        try:
+            return f(self.left.as_const(eval_ctx), self.right.as_const(eval_ctx))
+        except Exception:
+            raise Impossible()
+
+
+class UnaryExpr(Expr):
+    """Baseclass for all unary expressions."""
+
+    fields = ("node",)
+    operator = None
+    abstract = True
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        # intercepted operators cannot be folded at compile time
+        if (
+            self.environment.sandboxed
+            and self.operator in self.environment.intercepted_unops
+        ):
+            raise Impossible()
+        f = _uaop_to_func[self.operator]
+        try:
+            return f(self.node.as_const(eval_ctx))
+        except Exception:
+            raise Impossible()
+
+
+class Name(Expr):
+    """Looks up a name or stores a value in a name.
+    The `ctx` of the node can be one of the following values:
+
+    -   `store`: store a value in the name
+    -   `load`: load that name
+    -   `param`: like `store` but if the name was defined as function parameter.
+    """
+
+    fields = ("name", "ctx")
+
+    def can_assign(self):
+        return self.name not in ("true", "false", "none", "True", "False", "None")
+
+
+class NSRef(Expr):
+    """Reference to a namespace value assignment"""
+
+    fields = ("name", "attr")
+
+    def can_assign(self):
+        # We don't need any special checks here; NSRef assignments have a
+        # runtime check to ensure the target is a namespace object which will
+        # have been checked already as it is created using a normal assignment
+        # which goes through a `Name` node.
+        return True
+
+
+class Literal(Expr):
+    """Baseclass for literals."""
+
+    abstract = True
+
+
+class Const(Literal):
+    """All constant values.  The parser will return this node for simple
+    constants such as ``42`` or ``"foo"`` but it can be used to store more
+    complex values such as lists too.  Only constants with a safe
+    representation (objects where ``eval(repr(x)) == x`` is true).
+    """
+
+    fields = ("value",)
+
+    def as_const(self, eval_ctx=None):
+        rv = self.value
+        if (
+            PY2
+            and type(rv) is text_type
+            and self.environment.policies["compiler.ascii_str"]
+        ):
+            try:
+                rv = rv.encode("ascii")
+            except UnicodeError:
+                pass
+        return rv
+
+    @classmethod
+    def from_untrusted(cls, value, lineno=None, environment=None):
+        """Return a const object if the value is representable as
+        constant value in the generated code, otherwise it will raise
+        an `Impossible` exception.
+        """
+        from .compiler import has_safe_repr
+
+        if not has_safe_repr(value):
+            raise Impossible()
+        return cls(value, lineno=lineno, environment=environment)
+
+
+class TemplateData(Literal):
+    """A constant template string."""
+
+    fields = ("data",)
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        if eval_ctx.volatile:
+            raise Impossible()
+        if eval_ctx.autoescape:
+            return Markup(self.data)
+        return self.data
+
+
+class Tuple(Literal):
+    """For loop unpacking and some other things like multiple arguments
+    for subscripts.  Like for :class:`Name` `ctx` specifies if the tuple
+    is used for loading the names or storing.
+    """
+
+    fields = ("items", "ctx")
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return tuple(x.as_const(eval_ctx) for x in self.items)
+
+    def can_assign(self):
+        for item in self.items:
+            if not item.can_assign():
+                return False
+        return True
+
+
+class List(Literal):
+    """Any list literal such as ``[1, 2, 3]``"""
+
+    fields = ("items",)
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return [x.as_const(eval_ctx) for x in self.items]
+
+
+class Dict(Literal):
+    """Any dict literal such as ``{1: 2, 3: 4}``.  The items must be a list of
+    :class:`Pair` nodes.
+    """
+
+    fields = ("items",)
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return dict(x.as_const(eval_ctx) for x in self.items)
+
+
+class Pair(Helper):
+    """A key, value pair for dicts."""
+
+    fields = ("key", "value")
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return self.key.as_const(eval_ctx), self.value.as_const(eval_ctx)
+
+
+class Keyword(Helper):
+    """A key, value pair for keyword arguments where key is a string."""
+
+    fields = ("key", "value")
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return self.key, self.value.as_const(eval_ctx)
+
+
+class CondExpr(Expr):
+    """A conditional expression (inline if expression).  (``{{
+    foo if bar else baz }}``)
+    """
+
+    fields = ("test", "expr1", "expr2")
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        if self.test.as_const(eval_ctx):
+            return self.expr1.as_const(eval_ctx)
+
+        # if we evaluate to an undefined object, we better do that at runtime
+        if self.expr2 is None:
+            raise Impossible()
+
+        return self.expr2.as_const(eval_ctx)
+
+
+def args_as_const(node, eval_ctx):
+    args = [x.as_const(eval_ctx) for x in node.args]
+    kwargs = dict(x.as_const(eval_ctx) for x in node.kwargs)
+
+    if node.dyn_args is not None:
+        try:
+            args.extend(node.dyn_args.as_const(eval_ctx))
+        except Exception:
+            raise Impossible()
+
+    if node.dyn_kwargs is not None:
+        try:
+            kwargs.update(node.dyn_kwargs.as_const(eval_ctx))
+        except Exception:
+            raise Impossible()
+
+    return args, kwargs
+
+
+class Filter(Expr):
+    """This node applies a filter on an expression.  `name` is the name of
+    the filter, the rest of the fields are the same as for :class:`Call`.
+
+    If the `node` of a filter is `None` the contents of the last buffer are
+    filtered.  Buffers are created by macros and filter blocks.
+    """
+
+    fields = ("node", "name", "args", "kwargs", "dyn_args", "dyn_kwargs")
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+
+        if eval_ctx.volatile or self.node is None:
+            raise Impossible()
+
+        # we have to be careful here because we call filter_ below.
+        # if this variable would be called filter, 2to3 would wrap the
+        # call in a list because it is assuming we are talking about the
+        # builtin filter function here which no longer returns a list in
+        # python 3.  because of that, do not rename filter_ to filter!
+        filter_ = self.environment.filters.get(self.name)
+
+        if filter_ is None or getattr(filter_, "contextfilter", False) is True:
+            raise Impossible()
+
+        # We cannot constant handle async filters, so we need to make sure
+        # to not go down this path.
+        if eval_ctx.environment.is_async and getattr(
+            filter_, "asyncfiltervariant", False
+        ):
+            raise Impossible()
+
+        args, kwargs = args_as_const(self, eval_ctx)
+        args.insert(0, self.node.as_const(eval_ctx))
+
+        if getattr(filter_, "evalcontextfilter", False) is True:
+            args.insert(0, eval_ctx)
+        elif getattr(filter_, "environmentfilter", False) is True:
+            args.insert(0, self.environment)
+
+        try:
+            return filter_(*args, **kwargs)
+        except Exception:
+            raise Impossible()
+
+
+class Test(Expr):
+    """Applies a test on an expression.  `name` is the name of the test, the
+    rest of the fields are the same as for :class:`Call`.
+    """
+
+    fields = ("node", "name", "args", "kwargs", "dyn_args", "dyn_kwargs")
+
+    def as_const(self, eval_ctx=None):
+        test = self.environment.tests.get(self.name)
+
+        if test is None:
+            raise Impossible()
+
+        eval_ctx = get_eval_context(self, eval_ctx)
+        args, kwargs = args_as_const(self, eval_ctx)
+        args.insert(0, self.node.as_const(eval_ctx))
+
+        try:
+            return test(*args, **kwargs)
+        except Exception:
+            raise Impossible()
+
+
+class Call(Expr):
+    """Calls an expression.  `args` is a list of arguments, `kwargs` a list
+    of keyword arguments (list of :class:`Keyword` nodes), and `dyn_args`
+    and `dyn_kwargs` has to be either `None` or a node that is used as
+    node for dynamic positional (``*args``) or keyword (``**kwargs``)
+    arguments.
+    """
+
+    fields = ("node", "args", "kwargs", "dyn_args", "dyn_kwargs")
+
+
+class Getitem(Expr):
+    """Get an attribute or item from an expression and prefer the item."""
+
+    fields = ("node", "arg", "ctx")
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        if self.ctx != "load":
+            raise Impossible()
+        try:
+            return self.environment.getitem(
+                self.node.as_const(eval_ctx), self.arg.as_const(eval_ctx)
+            )
+        except Exception:
+            raise Impossible()
+
+    def can_assign(self):
+        return False
+
+
+class Getattr(Expr):
+    """Get an attribute or item from an expression that is a ascii-only
+    bytestring and prefer the attribute.
+    """
+
+    fields = ("node", "attr", "ctx")
+
+    def as_const(self, eval_ctx=None):
+        if self.ctx != "load":
+            raise Impossible()
+        try:
+            eval_ctx = get_eval_context(self, eval_ctx)
+            return self.environment.getattr(self.node.as_const(eval_ctx), self.attr)
+        except Exception:
+            raise Impossible()
+
+    def can_assign(self):
+        return False
+
+
+class Slice(Expr):
+    """Represents a slice object.  This must only be used as argument for
+    :class:`Subscript`.
+    """
+
+    fields = ("start", "stop", "step")
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+
+        def const(obj):
+            if obj is None:
+                return None
+            return obj.as_const(eval_ctx)
+
+        return slice(const(self.start), const(self.stop), const(self.step))
+
+
+class Concat(Expr):
+    """Concatenates the list of expressions provided after converting them to
+    unicode.
+    """
+
+    fields = ("nodes",)
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return "".join(text_type(x.as_const(eval_ctx)) for x in self.nodes)
+
+
+class Compare(Expr):
+    """Compares an expression with some other expressions.  `ops` must be a
+    list of :class:`Operand`\\s.
+    """
+
+    fields = ("expr", "ops")
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        result = value = self.expr.as_const(eval_ctx)
+
+        try:
+            for op in self.ops:
+                new_value = op.expr.as_const(eval_ctx)
+                result = _cmpop_to_func[op.op](value, new_value)
+
+                if not result:
+                    return False
+
+                value = new_value
+        except Exception:
+            raise Impossible()
+
+        return result
+
+
+class Operand(Helper):
+    """Holds an operator and an expression."""
+
+    fields = ("op", "expr")
+
+
+if __debug__:
+    Operand.__doc__ += "\nThe following operators are available: " + ", ".join(
+        sorted(
+            "``%s``" % x
+            for x in set(_binop_to_func) | set(_uaop_to_func) | set(_cmpop_to_func)
+        )
+    )
+
+
+class Mul(BinExpr):
+    """Multiplies the left with the right node."""
+
+    operator = "*"
+
+
+class Div(BinExpr):
+    """Divides the left by the right node."""
+
+    operator = "/"
+
+
+class FloorDiv(BinExpr):
+    """Divides the left by the right node and truncates conver the
+    result into an integer by truncating.
+    """
+
+    operator = "//"
+
+
+class Add(BinExpr):
+    """Add the left to the right node."""
+
+    operator = "+"
+
+
+class Sub(BinExpr):
+    """Subtract the right from the left node."""
+
+    operator = "-"
+
+
+class Mod(BinExpr):
+    """Left modulo right."""
+
+    operator = "%"
+
+
+class Pow(BinExpr):
+    """Left to the power of right."""
+
+    operator = "**"
+
+
+class And(BinExpr):
+    """Short circuited AND."""
+
+    operator = "and"
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return self.left.as_const(eval_ctx) and self.right.as_const(eval_ctx)
+
+
+class Or(BinExpr):
+    """Short circuited OR."""
+
+    operator = "or"
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return self.left.as_const(eval_ctx) or self.right.as_const(eval_ctx)
+
+
+class Not(UnaryExpr):
+    """Negate the expression."""
+
+    operator = "not"
+
+
+class Neg(UnaryExpr):
+    """Make the expression negative."""
+
+    operator = "-"
+
+
+class Pos(UnaryExpr):
+    """Make the expression positive (noop for most expressions)"""
+
+    operator = "+"
+
+
+# Helpers for extensions
+
+
+class EnvironmentAttribute(Expr):
+    """Loads an attribute from the environment object.  This is useful for
+    extensions that want to call a callback stored on the environment.
+    """
+
+    fields = ("name",)
+
+
+class ExtensionAttribute(Expr):
+    """Returns the attribute of an extension bound to the environment.
+    The identifier is the identifier of the :class:`Extension`.
+
+    This node is usually constructed by calling the
+    :meth:`~jinja2.ext.Extension.attr` method on an extension.
+    """
+
+    fields = ("identifier", "name")
+
+
+class ImportedName(Expr):
+    """If created with an import name the import name is returned on node
+    access.  For example ``ImportedName('cgi.escape')`` returns the `escape`
+    function from the cgi module on evaluation.  Imports are optimized by the
+    compiler so there is no need to assign them to local variables.
+    """
+
+    fields = ("importname",)
+
+
+class InternalName(Expr):
+    """An internal name in the compiler.  You cannot create these nodes
+    yourself but the parser provides a
+    :meth:`~jinja2.parser.Parser.free_identifier` method that creates
+    a new identifier for you.  This identifier is not available from the
+    template and is not threated specially by the compiler.
+    """
+
+    fields = ("name",)
+
+    def __init__(self):
+        raise TypeError(
+            "Can't create internal names.  Use the "
+            "`free_identifier` method on a parser."
+        )
+
+
+class MarkSafe(Expr):
+    """Mark the wrapped expression as safe (wrap it as `Markup`)."""
+
+    fields = ("expr",)
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return Markup(self.expr.as_const(eval_ctx))
+
+
+class MarkSafeIfAutoescape(Expr):
+    """Mark the wrapped expression as safe (wrap it as `Markup`) but
+    only if autoescaping is active.
+
+    .. versionadded:: 2.5
+    """
+
+    fields = ("expr",)
+
+    def as_const(self, eval_ctx=None):
+        eval_ctx = get_eval_context(self, eval_ctx)
+        if eval_ctx.volatile:
+            raise Impossible()
+        expr = self.expr.as_const(eval_ctx)
+        if eval_ctx.autoescape:
+            return Markup(expr)
+        return expr
+
+
+class ContextReference(Expr):
+    """Returns the current template context.  It can be used like a
+    :class:`Name` node, with a ``'load'`` ctx and will return the
+    current :class:`~jinja2.runtime.Context` object.
+
+    Here an example that assigns the current template name to a
+    variable named `foo`::
+
+        Assign(Name('foo', ctx='store'),
+               Getattr(ContextReference(), 'name'))
+
+    This is basically equivalent to using the
+    :func:`~jinja2.contextfunction` decorator when using the
+    high-level API, which causes a reference to the context to be passed
+    as the first argument to a function.
+    """
+
+
+class DerivedContextReference(Expr):
+    """Return the current template context including locals. Behaves
+    exactly like :class:`ContextReference`, but includes local
+    variables, such as from a ``for`` loop.
+
+    .. versionadded:: 2.11
+    """
+
+
+class Continue(Stmt):
+    """Continue a loop."""
+
+
+class Break(Stmt):
+    """Break a loop."""
+
+
+class Scope(Stmt):
+    """An artificial scope."""
+
+    fields = ("body",)
+
+
+class OverlayScope(Stmt):
+    """An overlay scope for extensions.  This is a largely unoptimized scope
+    that however can be used to introduce completely arbitrary variables into
+    a sub scope from a dictionary or dictionary like object.  The `context`
+    field has to evaluate to a dictionary object.
+
+    Example usage::
+
+        OverlayScope(context=self.call_method('get_context'),
+                     body=[...])
+
+    .. versionadded:: 2.10
+    """
+
+    fields = ("context", "body")
+
+
+class EvalContextModifier(Stmt):
+    """Modifies the eval context.  For each option that should be modified,
+    a :class:`Keyword` has to be added to the :attr:`options` list.
+
+    Example to change the `autoescape` setting::
+
+        EvalContextModifier(options=[Keyword('autoescape', Const(True))])
+    """
+
+    fields = ("options",)
+
+
+class ScopedEvalContextModifier(EvalContextModifier):
+    """Modifies the eval context and reverts it later.  Works exactly like
+    :class:`EvalContextModifier` but will only modify the
+    :class:`~jinja2.nodes.EvalContext` for nodes in the :attr:`body`.
+    """
+
+    fields = ("body",)
+
+
+# make sure nobody creates custom nodes
+def _failing_new(*args, **kwargs):
+    raise TypeError("can't create custom node types")
+
+
+NodeType.__new__ = staticmethod(_failing_new)
+del _failing_new
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/optimizer.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/optimizer.py
new file mode 100644
index 0000000..7bc78c4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/optimizer.py
@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+"""The optimizer tries to constant fold expressions and modify the AST
+in place so that it should be faster to evaluate.
+
+Because the AST does not contain all the scoping information and the
+compiler has to find that out, we cannot do all the optimizations we
+want. For example, loop unrolling doesn't work because unrolled loops
+would have a different scope. The solution would be a second syntax tree
+that stored the scoping rules.
+"""
+from . import nodes
+from .visitor import NodeTransformer
+
+
+def optimize(node, environment):
+    """The context hint can be used to perform an static optimization
+    based on the context given."""
+    optimizer = Optimizer(environment)
+    return optimizer.visit(node)
+
+
+class Optimizer(NodeTransformer):
+    def __init__(self, environment):
+        self.environment = environment
+
+    def generic_visit(self, node, *args, **kwargs):
+        node = super(Optimizer, self).generic_visit(node, *args, **kwargs)
+
+        # Do constant folding. Some other nodes besides Expr have
+        # as_const, but folding them causes errors later on.
+        if isinstance(node, nodes.Expr):
+            try:
+                return nodes.Const.from_untrusted(
+                    node.as_const(args[0] if args else None),
+                    lineno=node.lineno,
+                    environment=self.environment,
+                )
+            except nodes.Impossible:
+                pass
+
+        return node
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/parser.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/parser.py
new file mode 100644
index 0000000..d588106
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/parser.py
@@ -0,0 +1,939 @@
+# -*- coding: utf-8 -*-
+"""Parse tokens from the lexer into nodes for the compiler."""
+from . import nodes
+from ._compat import imap
+from .exceptions import TemplateAssertionError
+from .exceptions import TemplateSyntaxError
+from .lexer import describe_token
+from .lexer import describe_token_expr
+
+_statement_keywords = frozenset(
+    [
+        "for",
+        "if",
+        "block",
+        "extends",
+        "print",
+        "macro",
+        "include",
+        "from",
+        "import",
+        "set",
+        "with",
+        "autoescape",
+    ]
+)
+_compare_operators = frozenset(["eq", "ne", "lt", "lteq", "gt", "gteq"])
+
+_math_nodes = {
+    "add": nodes.Add,
+    "sub": nodes.Sub,
+    "mul": nodes.Mul,
+    "div": nodes.Div,
+    "floordiv": nodes.FloorDiv,
+    "mod": nodes.Mod,
+}
+
+
+class Parser(object):
+    """This is the central parsing class Jinja uses.  It's passed to
+    extensions and can be used to parse expressions or statements.
+    """
+
+    def __init__(self, environment, source, name=None, filename=None, state=None):
+        self.environment = environment
+        self.stream = environment._tokenize(source, name, filename, state)
+        self.name = name
+        self.filename = filename
+        self.closed = False
+        self.extensions = {}
+        for extension in environment.iter_extensions():
+            for tag in extension.tags:
+                self.extensions[tag] = extension.parse
+        self._last_identifier = 0
+        self._tag_stack = []
+        self._end_token_stack = []
+
+    def fail(self, msg, lineno=None, exc=TemplateSyntaxError):
+        """Convenience method that raises `exc` with the message, passed
+        line number or last line number as well as the current name and
+        filename.
+        """
+        if lineno is None:
+            lineno = self.stream.current.lineno
+        raise exc(msg, lineno, self.name, self.filename)
+
+    def _fail_ut_eof(self, name, end_token_stack, lineno):
+        expected = []
+        for exprs in end_token_stack:
+            expected.extend(imap(describe_token_expr, exprs))
+        if end_token_stack:
+            currently_looking = " or ".join(
+                "'%s'" % describe_token_expr(expr) for expr in end_token_stack[-1]
+            )
+        else:
+            currently_looking = None
+
+        if name is None:
+            message = ["Unexpected end of template."]
+        else:
+            message = ["Encountered unknown tag '%s'." % name]
+
+        if currently_looking:
+            if name is not None and name in expected:
+                message.append(
+                    "You probably made a nesting mistake. Jinja "
+                    "is expecting this tag, but currently looking "
+                    "for %s." % currently_looking
+                )
+            else:
+                message.append(
+                    "Jinja was looking for the following tags: "
+                    "%s." % currently_looking
+                )
+
+        if self._tag_stack:
+            message.append(
+                "The innermost block that needs to be "
+                "closed is '%s'." % self._tag_stack[-1]
+            )
+
+        self.fail(" ".join(message), lineno)
+
+    def fail_unknown_tag(self, name, lineno=None):
+        """Called if the parser encounters an unknown tag.  Tries to fail
+        with a human readable error message that could help to identify
+        the problem.
+        """
+        return self._fail_ut_eof(name, self._end_token_stack, lineno)
+
+    def fail_eof(self, end_tokens=None, lineno=None):
+        """Like fail_unknown_tag but for end of template situations."""
+        stack = list(self._end_token_stack)
+        if end_tokens is not None:
+            stack.append(end_tokens)
+        return self._fail_ut_eof(None, stack, lineno)
+
+    def is_tuple_end(self, extra_end_rules=None):
+        """Are we at the end of a tuple?"""
+        if self.stream.current.type in ("variable_end", "block_end", "rparen"):
+            return True
+        elif extra_end_rules is not None:
+            return self.stream.current.test_any(extra_end_rules)
+        return False
+
+    def free_identifier(self, lineno=None):
+        """Return a new free identifier as :class:`~jinja2.nodes.InternalName`."""
+        self._last_identifier += 1
+        rv = object.__new__(nodes.InternalName)
+        nodes.Node.__init__(rv, "fi%d" % self._last_identifier, lineno=lineno)
+        return rv
+
+    def parse_statement(self):
+        """Parse a single statement."""
+        token = self.stream.current
+        if token.type != "name":
+            self.fail("tag name expected", token.lineno)
+        self._tag_stack.append(token.value)
+        pop_tag = True
+        try:
+            if token.value in _statement_keywords:
+                return getattr(self, "parse_" + self.stream.current.value)()
+            if token.value == "call":
+                return self.parse_call_block()
+            if token.value == "filter":
+                return self.parse_filter_block()
+            ext = self.extensions.get(token.value)
+            if ext is not None:
+                return ext(self)
+
+            # did not work out, remove the token we pushed by accident
+            # from the stack so that the unknown tag fail function can
+            # produce a proper error message.
+            self._tag_stack.pop()
+            pop_tag = False
+            self.fail_unknown_tag(token.value, token.lineno)
+        finally:
+            if pop_tag:
+                self._tag_stack.pop()
+
+    def parse_statements(self, end_tokens, drop_needle=False):
+        """Parse multiple statements into a list until one of the end tokens
+        is reached.  This is used to parse the body of statements as it also
+        parses template data if appropriate.  The parser checks first if the
+        current token is a colon and skips it if there is one.  Then it checks
+        for the block end and parses until if one of the `end_tokens` is
+        reached.  Per default the active token in the stream at the end of
+        the call is the matched end token.  If this is not wanted `drop_needle`
+        can be set to `True` and the end token is removed.
+        """
+        # the first token may be a colon for python compatibility
+        self.stream.skip_if("colon")
+
+        # in the future it would be possible to add whole code sections
+        # by adding some sort of end of statement token and parsing those here.
+        self.stream.expect("block_end")
+        result = self.subparse(end_tokens)
+
+        # we reached the end of the template too early, the subparser
+        # does not check for this, so we do that now
+        if self.stream.current.type == "eof":
+            self.fail_eof(end_tokens)
+
+        if drop_needle:
+            next(self.stream)
+        return result
+
+    def parse_set(self):
+        """Parse an assign statement."""
+        lineno = next(self.stream).lineno
+        target = self.parse_assign_target(with_namespace=True)
+        if self.stream.skip_if("assign"):
+            expr = self.parse_tuple()
+            return nodes.Assign(target, expr, lineno=lineno)
+        filter_node = self.parse_filter(None)
+        body = self.parse_statements(("name:endset",), drop_needle=True)
+        return nodes.AssignBlock(target, filter_node, body, lineno=lineno)
+
+    def parse_for(self):
+        """Parse a for loop."""
+        lineno = self.stream.expect("name:for").lineno
+        target = self.parse_assign_target(extra_end_rules=("name:in",))
+        self.stream.expect("name:in")
+        iter = self.parse_tuple(
+            with_condexpr=False, extra_end_rules=("name:recursive",)
+        )
+        test = None
+        if self.stream.skip_if("name:if"):
+            test = self.parse_expression()
+        recursive = self.stream.skip_if("name:recursive")
+        body = self.parse_statements(("name:endfor", "name:else"))
+        if next(self.stream).value == "endfor":
+            else_ = []
+        else:
+            else_ = self.parse_statements(("name:endfor",), drop_needle=True)
+        return nodes.For(target, iter, body, else_, test, recursive, lineno=lineno)
+
+    def parse_if(self):
+        """Parse an if construct."""
+        node = result = nodes.If(lineno=self.stream.expect("name:if").lineno)
+        while 1:
+            node.test = self.parse_tuple(with_condexpr=False)
+            node.body = self.parse_statements(("name:elif", "name:else", "name:endif"))
+            node.elif_ = []
+            node.else_ = []
+            token = next(self.stream)
+            if token.test("name:elif"):
+                node = nodes.If(lineno=self.stream.current.lineno)
+                result.elif_.append(node)
+                continue
+            elif token.test("name:else"):
+                result.else_ = self.parse_statements(("name:endif",), drop_needle=True)
+            break
+        return result
+
+    def parse_with(self):
+        node = nodes.With(lineno=next(self.stream).lineno)
+        targets = []
+        values = []
+        while self.stream.current.type != "block_end":
+            if targets:
+                self.stream.expect("comma")
+            target = self.parse_assign_target()
+            target.set_ctx("param")
+            targets.append(target)
+            self.stream.expect("assign")
+            values.append(self.parse_expression())
+        node.targets = targets
+        node.values = values
+        node.body = self.parse_statements(("name:endwith",), drop_needle=True)
+        return node
+
+    def parse_autoescape(self):
+        node = nodes.ScopedEvalContextModifier(lineno=next(self.stream).lineno)
+        node.options = [nodes.Keyword("autoescape", self.parse_expression())]
+        node.body = self.parse_statements(("name:endautoescape",), drop_needle=True)
+        return nodes.Scope([node])
+
+    def parse_block(self):
+        node = nodes.Block(lineno=next(self.stream).lineno)
+        node.name = self.stream.expect("name").value
+        node.scoped = self.stream.skip_if("name:scoped")
+
+        # common problem people encounter when switching from django
+        # to jinja.  we do not support hyphens in block names, so let's
+        # raise a nicer error message in that case.
+        if self.stream.current.type == "sub":
+            self.fail(
+                "Block names in Jinja have to be valid Python "
+                "identifiers and may not contain hyphens, use an "
+                "underscore instead."
+            )
+
+        node.body = self.parse_statements(("name:endblock",), drop_needle=True)
+        self.stream.skip_if("name:" + node.name)
+        return node
+
+    def parse_extends(self):
+        node = nodes.Extends(lineno=next(self.stream).lineno)
+        node.template = self.parse_expression()
+        return node
+
+    def parse_import_context(self, node, default):
+        if self.stream.current.test_any(
+            "name:with", "name:without"
+        ) and self.stream.look().test("name:context"):
+            node.with_context = next(self.stream).value == "with"
+            self.stream.skip()
+        else:
+            node.with_context = default
+        return node
+
+    def parse_include(self):
+        node = nodes.Include(lineno=next(self.stream).lineno)
+        node.template = self.parse_expression()
+        if self.stream.current.test("name:ignore") and self.stream.look().test(
+            "name:missing"
+        ):
+            node.ignore_missing = True
+            self.stream.skip(2)
+        else:
+            node.ignore_missing = False
+        return self.parse_import_context(node, True)
+
+    def parse_import(self):
+        node = nodes.Import(lineno=next(self.stream).lineno)
+        node.template = self.parse_expression()
+        self.stream.expect("name:as")
+        node.target = self.parse_assign_target(name_only=True).name
+        return self.parse_import_context(node, False)
+
+    def parse_from(self):
+        node = nodes.FromImport(lineno=next(self.stream).lineno)
+        node.template = self.parse_expression()
+        self.stream.expect("name:import")
+        node.names = []
+
+        def parse_context():
+            if self.stream.current.value in (
+                "with",
+                "without",
+            ) and self.stream.look().test("name:context"):
+                node.with_context = next(self.stream).value == "with"
+                self.stream.skip()
+                return True
+            return False
+
+        while 1:
+            if node.names:
+                self.stream.expect("comma")
+            if self.stream.current.type == "name":
+                if parse_context():
+                    break
+                target = self.parse_assign_target(name_only=True)
+                if target.name.startswith("_"):
+                    self.fail(
+                        "names starting with an underline can not be imported",
+                        target.lineno,
+                        exc=TemplateAssertionError,
+                    )
+                if self.stream.skip_if("name:as"):
+                    alias = self.parse_assign_target(name_only=True)
+                    node.names.append((target.name, alias.name))
+                else:
+                    node.names.append(target.name)
+                if parse_context() or self.stream.current.type != "comma":
+                    break
+            else:
+                self.stream.expect("name")
+        if not hasattr(node, "with_context"):
+            node.with_context = False
+        return node
+
+    def parse_signature(self, node):
+        node.args = args = []
+        node.defaults = defaults = []
+        self.stream.expect("lparen")
+        while self.stream.current.type != "rparen":
+            if args:
+                self.stream.expect("comma")
+            arg = self.parse_assign_target(name_only=True)
+            arg.set_ctx("param")
+            if self.stream.skip_if("assign"):
+                defaults.append(self.parse_expression())
+            elif defaults:
+                self.fail("non-default argument follows default argument")
+            args.append(arg)
+        self.stream.expect("rparen")
+
+    def parse_call_block(self):
+        node = nodes.CallBlock(lineno=next(self.stream).lineno)
+        if self.stream.current.type == "lparen":
+            self.parse_signature(node)
+        else:
+            node.args = []
+            node.defaults = []
+
+        node.call = self.parse_expression()
+        if not isinstance(node.call, nodes.Call):
+            self.fail("expected call", node.lineno)
+        node.body = self.parse_statements(("name:endcall",), drop_needle=True)
+        return node
+
+    def parse_filter_block(self):
+        node = nodes.FilterBlock(lineno=next(self.stream).lineno)
+        node.filter = self.parse_filter(None, start_inline=True)
+        node.body = self.parse_statements(("name:endfilter",), drop_needle=True)
+        return node
+
+    def parse_macro(self):
+        node = nodes.Macro(lineno=next(self.stream).lineno)
+        node.name = self.parse_assign_target(name_only=True).name
+        self.parse_signature(node)
+        node.body = self.parse_statements(("name:endmacro",), drop_needle=True)
+        return node
+
+    def parse_print(self):
+        node = nodes.Output(lineno=next(self.stream).lineno)
+        node.nodes = []
+        while self.stream.current.type != "block_end":
+            if node.nodes:
+                self.stream.expect("comma")
+            node.nodes.append(self.parse_expression())
+        return node
+
+    def parse_assign_target(
+        self,
+        with_tuple=True,
+        name_only=False,
+        extra_end_rules=None,
+        with_namespace=False,
+    ):
+        """Parse an assignment target.  As Jinja allows assignments to
+        tuples, this function can parse all allowed assignment targets.  Per
+        default assignments to tuples are parsed, that can be disable however
+        by setting `with_tuple` to `False`.  If only assignments to names are
+        wanted `name_only` can be set to `True`.  The `extra_end_rules`
+        parameter is forwarded to the tuple parsing function.  If
+        `with_namespace` is enabled, a namespace assignment may be parsed.
+        """
+        if with_namespace and self.stream.look().type == "dot":
+            token = self.stream.expect("name")
+            next(self.stream)  # dot
+            attr = self.stream.expect("name")
+            target = nodes.NSRef(token.value, attr.value, lineno=token.lineno)
+        elif name_only:
+            token = self.stream.expect("name")
+            target = nodes.Name(token.value, "store", lineno=token.lineno)
+        else:
+            if with_tuple:
+                target = self.parse_tuple(
+                    simplified=True, extra_end_rules=extra_end_rules
+                )
+            else:
+                target = self.parse_primary()
+            target.set_ctx("store")
+        if not target.can_assign():
+            self.fail(
+                "can't assign to %r" % target.__class__.__name__.lower(), target.lineno
+            )
+        return target
+
+    def parse_expression(self, with_condexpr=True):
+        """Parse an expression.  Per default all expressions are parsed, if
+        the optional `with_condexpr` parameter is set to `False` conditional
+        expressions are not parsed.
+        """
+        if with_condexpr:
+            return self.parse_condexpr()
+        return self.parse_or()
+
+    def parse_condexpr(self):
+        lineno = self.stream.current.lineno
+        expr1 = self.parse_or()
+        while self.stream.skip_if("name:if"):
+            expr2 = self.parse_or()
+            if self.stream.skip_if("name:else"):
+                expr3 = self.parse_condexpr()
+            else:
+                expr3 = None
+            expr1 = nodes.CondExpr(expr2, expr1, expr3, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return expr1
+
+    def parse_or(self):
+        lineno = self.stream.current.lineno
+        left = self.parse_and()
+        while self.stream.skip_if("name:or"):
+            right = self.parse_and()
+            left = nodes.Or(left, right, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return left
+
+    def parse_and(self):
+        lineno = self.stream.current.lineno
+        left = self.parse_not()
+        while self.stream.skip_if("name:and"):
+            right = self.parse_not()
+            left = nodes.And(left, right, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return left
+
+    def parse_not(self):
+        if self.stream.current.test("name:not"):
+            lineno = next(self.stream).lineno
+            return nodes.Not(self.parse_not(), lineno=lineno)
+        return self.parse_compare()
+
+    def parse_compare(self):
+        lineno = self.stream.current.lineno
+        expr = self.parse_math1()
+        ops = []
+        while 1:
+            token_type = self.stream.current.type
+            if token_type in _compare_operators:
+                next(self.stream)
+                ops.append(nodes.Operand(token_type, self.parse_math1()))
+            elif self.stream.skip_if("name:in"):
+                ops.append(nodes.Operand("in", self.parse_math1()))
+            elif self.stream.current.test("name:not") and self.stream.look().test(
+                "name:in"
+            ):
+                self.stream.skip(2)
+                ops.append(nodes.Operand("notin", self.parse_math1()))
+            else:
+                break
+            lineno = self.stream.current.lineno
+        if not ops:
+            return expr
+        return nodes.Compare(expr, ops, lineno=lineno)
+
+    def parse_math1(self):
+        lineno = self.stream.current.lineno
+        left = self.parse_concat()
+        while self.stream.current.type in ("add", "sub"):
+            cls = _math_nodes[self.stream.current.type]
+            next(self.stream)
+            right = self.parse_concat()
+            left = cls(left, right, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return left
+
+    def parse_concat(self):
+        lineno = self.stream.current.lineno
+        args = [self.parse_math2()]
+        while self.stream.current.type == "tilde":
+            next(self.stream)
+            args.append(self.parse_math2())
+        if len(args) == 1:
+            return args[0]
+        return nodes.Concat(args, lineno=lineno)
+
+    def parse_math2(self):
+        lineno = self.stream.current.lineno
+        left = self.parse_pow()
+        while self.stream.current.type in ("mul", "div", "floordiv", "mod"):
+            cls = _math_nodes[self.stream.current.type]
+            next(self.stream)
+            right = self.parse_pow()
+            left = cls(left, right, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return left
+
+    def parse_pow(self):
+        lineno = self.stream.current.lineno
+        left = self.parse_unary()
+        while self.stream.current.type == "pow":
+            next(self.stream)
+            right = self.parse_unary()
+            left = nodes.Pow(left, right, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return left
+
+    def parse_unary(self, with_filter=True):
+        token_type = self.stream.current.type
+        lineno = self.stream.current.lineno
+        if token_type == "sub":
+            next(self.stream)
+            node = nodes.Neg(self.parse_unary(False), lineno=lineno)
+        elif token_type == "add":
+            next(self.stream)
+            node = nodes.Pos(self.parse_unary(False), lineno=lineno)
+        else:
+            node = self.parse_primary()
+        node = self.parse_postfix(node)
+        if with_filter:
+            node = self.parse_filter_expr(node)
+        return node
+
+    def parse_primary(self):
+        token = self.stream.current
+        if token.type == "name":
+            if token.value in ("true", "false", "True", "False"):
+                node = nodes.Const(token.value in ("true", "True"), lineno=token.lineno)
+            elif token.value in ("none", "None"):
+                node = nodes.Const(None, lineno=token.lineno)
+            else:
+                node = nodes.Name(token.value, "load", lineno=token.lineno)
+            next(self.stream)
+        elif token.type == "string":
+            next(self.stream)
+            buf = [token.value]
+            lineno = token.lineno
+            while self.stream.current.type == "string":
+                buf.append(self.stream.current.value)
+                next(self.stream)
+            node = nodes.Const("".join(buf), lineno=lineno)
+        elif token.type in ("integer", "float"):
+            next(self.stream)
+            node = nodes.Const(token.value, lineno=token.lineno)
+        elif token.type == "lparen":
+            next(self.stream)
+            node = self.parse_tuple(explicit_parentheses=True)
+            self.stream.expect("rparen")
+        elif token.type == "lbracket":
+            node = self.parse_list()
+        elif token.type == "lbrace":
+            node = self.parse_dict()
+        else:
+            self.fail("unexpected '%s'" % describe_token(token), token.lineno)
+        return node
+
+    def parse_tuple(
+        self,
+        simplified=False,
+        with_condexpr=True,
+        extra_end_rules=None,
+        explicit_parentheses=False,
+    ):
+        """Works like `parse_expression` but if multiple expressions are
+        delimited by a comma a :class:`~jinja2.nodes.Tuple` node is created.
+        This method could also return a regular expression instead of a tuple
+        if no commas where found.
+
+        The default parsing mode is a full tuple.  If `simplified` is `True`
+        only names and literals are parsed.  The `no_condexpr` parameter is
+        forwarded to :meth:`parse_expression`.
+
+        Because tuples do not require delimiters and may end in a bogus comma
+        an extra hint is needed that marks the end of a tuple.  For example
+        for loops support tuples between `for` and `in`.  In that case the
+        `extra_end_rules` is set to ``['name:in']``.
+
+        `explicit_parentheses` is true if the parsing was triggered by an
+        expression in parentheses.  This is used to figure out if an empty
+        tuple is a valid expression or not.
+        """
+        lineno = self.stream.current.lineno
+        if simplified:
+            parse = self.parse_primary
+        elif with_condexpr:
+            parse = self.parse_expression
+        else:
+
+            def parse():
+                return self.parse_expression(with_condexpr=False)
+
+        args = []
+        is_tuple = False
+        while 1:
+            if args:
+                self.stream.expect("comma")
+            if self.is_tuple_end(extra_end_rules):
+                break
+            args.append(parse())
+            if self.stream.current.type == "comma":
+                is_tuple = True
+            else:
+                break
+            lineno = self.stream.current.lineno
+
+        if not is_tuple:
+            if args:
+                return args[0]
+
+            # if we don't have explicit parentheses, an empty tuple is
+            # not a valid expression.  This would mean nothing (literally
+            # nothing) in the spot of an expression would be an empty
+            # tuple.
+            if not explicit_parentheses:
+                self.fail(
+                    "Expected an expression, got '%s'"
+                    % describe_token(self.stream.current)
+                )
+
+        return nodes.Tuple(args, "load", lineno=lineno)
+
+    def parse_list(self):
+        token = self.stream.expect("lbracket")
+        items = []
+        while self.stream.current.type != "rbracket":
+            if items:
+                self.stream.expect("comma")
+            if self.stream.current.type == "rbracket":
+                break
+            items.append(self.parse_expression())
+        self.stream.expect("rbracket")
+        return nodes.List(items, lineno=token.lineno)
+
+    def parse_dict(self):
+        token = self.stream.expect("lbrace")
+        items = []
+        while self.stream.current.type != "rbrace":
+            if items:
+                self.stream.expect("comma")
+            if self.stream.current.type == "rbrace":
+                break
+            key = self.parse_expression()
+            self.stream.expect("colon")
+            value = self.parse_expression()
+            items.append(nodes.Pair(key, value, lineno=key.lineno))
+        self.stream.expect("rbrace")
+        return nodes.Dict(items, lineno=token.lineno)
+
+    def parse_postfix(self, node):
+        while 1:
+            token_type = self.stream.current.type
+            if token_type == "dot" or token_type == "lbracket":
+                node = self.parse_subscript(node)
+            # calls are valid both after postfix expressions (getattr
+            # and getitem) as well as filters and tests
+            elif token_type == "lparen":
+                node = self.parse_call(node)
+            else:
+                break
+        return node
+
+    def parse_filter_expr(self, node):
+        while 1:
+            token_type = self.stream.current.type
+            if token_type == "pipe":
+                node = self.parse_filter(node)
+            elif token_type == "name" and self.stream.current.value == "is":
+                node = self.parse_test(node)
+            # calls are valid both after postfix expressions (getattr
+            # and getitem) as well as filters and tests
+            elif token_type == "lparen":
+                node = self.parse_call(node)
+            else:
+                break
+        return node
+
+    def parse_subscript(self, node):
+        token = next(self.stream)
+        if token.type == "dot":
+            attr_token = self.stream.current
+            next(self.stream)
+            if attr_token.type == "name":
+                return nodes.Getattr(
+                    node, attr_token.value, "load", lineno=token.lineno
+                )
+            elif attr_token.type != "integer":
+                self.fail("expected name or number", attr_token.lineno)
+            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
+            return nodes.Getitem(node, arg, "load", lineno=token.lineno)
+        if token.type == "lbracket":
+            args = []
+            while self.stream.current.type != "rbracket":
+                if args:
+                    self.stream.expect("comma")
+                args.append(self.parse_subscribed())
+            self.stream.expect("rbracket")
+            if len(args) == 1:
+                arg = args[0]
+            else:
+                arg = nodes.Tuple(args, "load", lineno=token.lineno)
+            return nodes.Getitem(node, arg, "load", lineno=token.lineno)
+        self.fail("expected subscript expression", token.lineno)
+
+    def parse_subscribed(self):
+        lineno = self.stream.current.lineno
+
+        if self.stream.current.type == "colon":
+            next(self.stream)
+            args = [None]
+        else:
+            node = self.parse_expression()
+            if self.stream.current.type != "colon":
+                return node
+            next(self.stream)
+            args = [node]
+
+        if self.stream.current.type == "colon":
+            args.append(None)
+        elif self.stream.current.type not in ("rbracket", "comma"):
+            args.append(self.parse_expression())
+        else:
+            args.append(None)
+
+        if self.stream.current.type == "colon":
+            next(self.stream)
+            if self.stream.current.type not in ("rbracket", "comma"):
+                args.append(self.parse_expression())
+            else:
+                args.append(None)
+        else:
+            args.append(None)
+
+        return nodes.Slice(lineno=lineno, *args)
+
+    def parse_call(self, node):
+        token = self.stream.expect("lparen")
+        args = []
+        kwargs = []
+        dyn_args = dyn_kwargs = None
+        require_comma = False
+
+        def ensure(expr):
+            if not expr:
+                self.fail("invalid syntax for function call expression", token.lineno)
+
+        while self.stream.current.type != "rparen":
+            if require_comma:
+                self.stream.expect("comma")
+                # support for trailing comma
+                if self.stream.current.type == "rparen":
+                    break
+            if self.stream.current.type == "mul":
+                ensure(dyn_args is None and dyn_kwargs is None)
+                next(self.stream)
+                dyn_args = self.parse_expression()
+            elif self.stream.current.type == "pow":
+                ensure(dyn_kwargs is None)
+                next(self.stream)
+                dyn_kwargs = self.parse_expression()
+            else:
+                if (
+                    self.stream.current.type == "name"
+                    and self.stream.look().type == "assign"
+                ):
+                    # Parsing a kwarg
+                    ensure(dyn_kwargs is None)
+                    key = self.stream.current.value
+                    self.stream.skip(2)
+                    value = self.parse_expression()
+                    kwargs.append(nodes.Keyword(key, value, lineno=value.lineno))
+                else:
+                    # Parsing an arg
+                    ensure(dyn_args is None and dyn_kwargs is None and not kwargs)
+                    args.append(self.parse_expression())
+
+            require_comma = True
+        self.stream.expect("rparen")
+
+        if node is None:
+            return args, kwargs, dyn_args, dyn_kwargs
+        return nodes.Call(node, args, kwargs, dyn_args, dyn_kwargs, lineno=token.lineno)
+
+    def parse_filter(self, node, start_inline=False):
+        while self.stream.current.type == "pipe" or start_inline:
+            if not start_inline:
+                next(self.stream)
+            token = self.stream.expect("name")
+            name = token.value
+            while self.stream.current.type == "dot":
+                next(self.stream)
+                name += "." + self.stream.expect("name").value
+            if self.stream.current.type == "lparen":
+                args, kwargs, dyn_args, dyn_kwargs = self.parse_call(None)
+            else:
+                args = []
+                kwargs = []
+                dyn_args = dyn_kwargs = None
+            node = nodes.Filter(
+                node, name, args, kwargs, dyn_args, dyn_kwargs, lineno=token.lineno
+            )
+            start_inline = False
+        return node
+
+    def parse_test(self, node):
+        token = next(self.stream)
+        if self.stream.current.test("name:not"):
+            next(self.stream)
+            negated = True
+        else:
+            negated = False
+        name = self.stream.expect("name").value
+        while self.stream.current.type == "dot":
+            next(self.stream)
+            name += "." + self.stream.expect("name").value
+        dyn_args = dyn_kwargs = None
+        kwargs = []
+        if self.stream.current.type == "lparen":
+            args, kwargs, dyn_args, dyn_kwargs = self.parse_call(None)
+        elif self.stream.current.type in (
+            "name",
+            "string",
+            "integer",
+            "float",
+            "lparen",
+            "lbracket",
+            "lbrace",
+        ) and not self.stream.current.test_any("name:else", "name:or", "name:and"):
+            if self.stream.current.test("name:is"):
+                self.fail("You cannot chain multiple tests with is")
+            arg_node = self.parse_primary()
+            arg_node = self.parse_postfix(arg_node)
+            args = [arg_node]
+        else:
+            args = []
+        node = nodes.Test(
+            node, name, args, kwargs, dyn_args, dyn_kwargs, lineno=token.lineno
+        )
+        if negated:
+            node = nodes.Not(node, lineno=token.lineno)
+        return node
+
+    def subparse(self, end_tokens=None):
+        body = []
+        data_buffer = []
+        add_data = data_buffer.append
+
+        if end_tokens is not None:
+            self._end_token_stack.append(end_tokens)
+
+        def flush_data():
+            if data_buffer:
+                lineno = data_buffer[0].lineno
+                body.append(nodes.Output(data_buffer[:], lineno=lineno))
+                del data_buffer[:]
+
+        try:
+            while self.stream:
+                token = self.stream.current
+                if token.type == "data":
+                    if token.value:
+                        add_data(nodes.TemplateData(token.value, lineno=token.lineno))
+                    next(self.stream)
+                elif token.type == "variable_begin":
+                    next(self.stream)
+                    add_data(self.parse_tuple(with_condexpr=True))
+                    self.stream.expect("variable_end")
+                elif token.type == "block_begin":
+                    flush_data()
+                    next(self.stream)
+                    if end_tokens is not None and self.stream.current.test_any(
+                        *end_tokens
+                    ):
+                        return body
+                    rv = self.parse_statement()
+                    if isinstance(rv, list):
+                        body.extend(rv)
+                    else:
+                        body.append(rv)
+                    self.stream.expect("block_end")
+                else:
+                    raise AssertionError("internal parsing error")
+
+            flush_data()
+        finally:
+            if end_tokens is not None:
+                self._end_token_stack.pop()
+
+        return body
+
+    def parse(self):
+        """Parse the whole template into a `Template` node."""
+        result = nodes.Template(self.subparse(), lineno=1)
+        result.set_environment(self.environment)
+        return result
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/runtime.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/runtime.py
new file mode 100644
index 0000000..3ad7968
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/runtime.py
@@ -0,0 +1,1011 @@
+# -*- coding: utf-8 -*-
+"""The runtime functions and state used by compiled templates."""
+import sys
+from itertools import chain
+from types import MethodType
+
+from markupsafe import escape  # noqa: F401
+from markupsafe import Markup
+from markupsafe import soft_unicode
+
+from ._compat import abc
+from ._compat import imap
+from ._compat import implements_iterator
+from ._compat import implements_to_string
+from ._compat import iteritems
+from ._compat import PY2
+from ._compat import string_types
+from ._compat import text_type
+from ._compat import with_metaclass
+from .exceptions import TemplateNotFound  # noqa: F401
+from .exceptions import TemplateRuntimeError  # noqa: F401
+from .exceptions import UndefinedError
+from .nodes import EvalContext
+from .utils import concat
+from .utils import evalcontextfunction
+from .utils import internalcode
+from .utils import missing
+from .utils import Namespace  # noqa: F401
+from .utils import object_type_repr
+
+# these variables are exported to the template runtime
+exported = [
+    "LoopContext",
+    "TemplateReference",
+    "Macro",
+    "Markup",
+    "TemplateRuntimeError",
+    "missing",
+    "concat",
+    "escape",
+    "markup_join",
+    "unicode_join",
+    "to_string",
+    "identity",
+    "TemplateNotFound",
+    "Namespace",
+    "Undefined",
+]
+
+#: the name of the function that is used to convert something into
+#: a string.  We can just use the text type here.
+to_string = text_type
+
+
+def identity(x):
+    """Returns its argument. Useful for certain things in the
+    environment.
+    """
+    return x
+
+
+def markup_join(seq):
+    """Concatenation that escapes if necessary and converts to unicode."""
+    buf = []
+    iterator = imap(soft_unicode, seq)
+    for arg in iterator:
+        buf.append(arg)
+        if hasattr(arg, "__html__"):
+            return Markup(u"").join(chain(buf, iterator))
+    return concat(buf)
+
+
+def unicode_join(seq):
+    """Simple args to unicode conversion and concatenation."""
+    return concat(imap(text_type, seq))
+
+
+def new_context(
+    environment,
+    template_name,
+    blocks,
+    vars=None,
+    shared=None,
+    globals=None,
+    locals=None,
+):
+    """Internal helper for context creation."""
+    if vars is None:
+        vars = {}
+    if shared:
+        parent = vars
+    else:
+        parent = dict(globals or (), **vars)
+    if locals:
+        # if the parent is shared a copy should be created because
+        # we don't want to modify the dict passed
+        if shared:
+            parent = dict(parent)
+        for key, value in iteritems(locals):
+            if value is not missing:
+                parent[key] = value
+    return environment.context_class(environment, parent, template_name, blocks)
+
+
+class TemplateReference(object):
+    """The `self` in templates."""
+
+    def __init__(self, context):
+        self.__context = context
+
+    def __getitem__(self, name):
+        blocks = self.__context.blocks[name]
+        return BlockReference(name, self.__context, blocks, 0)
+
+    def __repr__(self):
+        return "<%s %r>" % (self.__class__.__name__, self.__context.name)
+
+
+def _get_func(x):
+    return getattr(x, "__func__", x)
+
+
+class ContextMeta(type):
+    def __new__(mcs, name, bases, d):
+        rv = type.__new__(mcs, name, bases, d)
+        if bases == ():
+            return rv
+
+        resolve = _get_func(rv.resolve)
+        default_resolve = _get_func(Context.resolve)
+        resolve_or_missing = _get_func(rv.resolve_or_missing)
+        default_resolve_or_missing = _get_func(Context.resolve_or_missing)
+
+        # If we have a changed resolve but no changed default or missing
+        # resolve we invert the call logic.
+        if (
+            resolve is not default_resolve
+            and resolve_or_missing is default_resolve_or_missing
+        ):
+            rv._legacy_resolve_mode = True
+        elif (
+            resolve is default_resolve
+            and resolve_or_missing is default_resolve_or_missing
+        ):
+            rv._fast_resolve_mode = True
+
+        return rv
+
+
+def resolve_or_missing(context, key, missing=missing):
+    if key in context.vars:
+        return context.vars[key]
+    if key in context.parent:
+        return context.parent[key]
+    return missing
+
+
+class Context(with_metaclass(ContextMeta)):
+    """The template context holds the variables of a template.  It stores the
+    values passed to the template and also the names the template exports.
+    Creating instances is neither supported nor useful as it's created
+    automatically at various stages of the template evaluation and should not
+    be created by hand.
+
+    The context is immutable.  Modifications on :attr:`parent` **must not**
+    happen and modifications on :attr:`vars` are allowed from generated
+    template code only.  Template filters and global functions marked as
+    :func:`contextfunction`\\s get the active context passed as first argument
+    and are allowed to access the context read-only.
+
+    The template context supports read only dict operations (`get`,
+    `keys`, `values`, `items`, `iterkeys`, `itervalues`, `iteritems`,
+    `__getitem__`, `__contains__`).  Additionally there is a :meth:`resolve`
+    method that doesn't fail with a `KeyError` but returns an
+    :class:`Undefined` object for missing variables.
+    """
+
+    # XXX: we want to eventually make this be a deprecation warning and
+    # remove it.
+    _legacy_resolve_mode = False
+    _fast_resolve_mode = False
+
+    def __init__(self, environment, parent, name, blocks):
+        self.parent = parent
+        self.vars = {}
+        self.environment = environment
+        self.eval_ctx = EvalContext(self.environment, name)
+        self.exported_vars = set()
+        self.name = name
+
+        # create the initial mapping of blocks.  Whenever template inheritance
+        # takes place the runtime will update this mapping with the new blocks
+        # from the template.
+        self.blocks = dict((k, [v]) for k, v in iteritems(blocks))
+
+        # In case we detect the fast resolve mode we can set up an alias
+        # here that bypasses the legacy code logic.
+        if self._fast_resolve_mode:
+            self.resolve_or_missing = MethodType(resolve_or_missing, self)
+
+    def super(self, name, current):
+        """Render a parent block."""
+        try:
+            blocks = self.blocks[name]
+            index = blocks.index(current) + 1
+            blocks[index]
+        except LookupError:
+            return self.environment.undefined(
+                "there is no parent block called %r." % name, name="super"
+            )
+        return BlockReference(name, self, blocks, index)
+
+    def get(self, key, default=None):
+        """Returns an item from the template context, if it doesn't exist
+        `default` is returned.
+        """
+        try:
+            return self[key]
+        except KeyError:
+            return default
+
+    def resolve(self, key):
+        """Looks up a variable like `__getitem__` or `get` but returns an
+        :class:`Undefined` object with the name of the name looked up.
+        """
+        if self._legacy_resolve_mode:
+            rv = resolve_or_missing(self, key)
+        else:
+            rv = self.resolve_or_missing(key)
+        if rv is missing:
+            return self.environment.undefined(name=key)
+        return rv
+
+    def resolve_or_missing(self, key):
+        """Resolves a variable like :meth:`resolve` but returns the
+        special `missing` value if it cannot be found.
+        """
+        if self._legacy_resolve_mode:
+            rv = self.resolve(key)
+            if isinstance(rv, Undefined):
+                rv = missing
+            return rv
+        return resolve_or_missing(self, key)
+
+    def get_exported(self):
+        """Get a new dict with the exported variables."""
+        return dict((k, self.vars[k]) for k in self.exported_vars)
+
+    def get_all(self):
+        """Return the complete context as dict including the exported
+        variables.  For optimizations reasons this might not return an
+        actual copy so be careful with using it.
+        """
+        if not self.vars:
+            return self.parent
+        if not self.parent:
+            return self.vars
+        return dict(self.parent, **self.vars)
+
+    @internalcode
+    def call(__self, __obj, *args, **kwargs):  # noqa: B902
+        """Call the callable with the arguments and keyword arguments
+        provided but inject the active context or environment as first
+        argument if the callable is a :func:`contextfunction` or
+        :func:`environmentfunction`.
+        """
+        if __debug__:
+            __traceback_hide__ = True  # noqa
+
+        # Allow callable classes to take a context
+        if hasattr(__obj, "__call__"):  # noqa: B004
+            fn = __obj.__call__
+            for fn_type in (
+                "contextfunction",
+                "evalcontextfunction",
+                "environmentfunction",
+            ):
+                if hasattr(fn, fn_type):
+                    __obj = fn
+                    break
+
+        if callable(__obj):
+            if getattr(__obj, "contextfunction", False) is True:
+                args = (__self,) + args
+            elif getattr(__obj, "evalcontextfunction", False) is True:
+                args = (__self.eval_ctx,) + args
+            elif getattr(__obj, "environmentfunction", False) is True:
+                args = (__self.environment,) + args
+        try:
+            return __obj(*args, **kwargs)
+        except StopIteration:
+            return __self.environment.undefined(
+                "value was undefined because "
+                "a callable raised a "
+                "StopIteration exception"
+            )
+
+    def derived(self, locals=None):
+        """Internal helper function to create a derived context.  This is
+        used in situations where the system needs a new context in the same
+        template that is independent.
+        """
+        context = new_context(
+            self.environment, self.name, {}, self.get_all(), True, None, locals
+        )
+        context.eval_ctx = self.eval_ctx
+        context.blocks.update((k, list(v)) for k, v in iteritems(self.blocks))
+        return context
+
+    def _all(meth):  # noqa: B902
+        def proxy(self):
+            return getattr(self.get_all(), meth)()
+
+        proxy.__doc__ = getattr(dict, meth).__doc__
+        proxy.__name__ = meth
+        return proxy
+
+    keys = _all("keys")
+    values = _all("values")
+    items = _all("items")
+
+    # not available on python 3
+    if PY2:
+        iterkeys = _all("iterkeys")
+        itervalues = _all("itervalues")
+        iteritems = _all("iteritems")
+    del _all
+
+    def __contains__(self, name):
+        return name in self.vars or name in self.parent
+
+    def __getitem__(self, key):
+        """Lookup a variable or raise `KeyError` if the variable is
+        undefined.
+        """
+        item = self.resolve_or_missing(key)
+        if item is missing:
+            raise KeyError(key)
+        return item
+
+    def __repr__(self):
+        return "<%s %s of %r>" % (
+            self.__class__.__name__,
+            repr(self.get_all()),
+            self.name,
+        )
+
+
+abc.Mapping.register(Context)
+
+
+class BlockReference(object):
+    """One block on a template reference."""
+
+    def __init__(self, name, context, stack, depth):
+        self.name = name
+        self._context = context
+        self._stack = stack
+        self._depth = depth
+
+    @property
+    def super(self):
+        """Super the block."""
+        if self._depth + 1 >= len(self._stack):
+            return self._context.environment.undefined(
+                "there is no parent block called %r." % self.name, name="super"
+            )
+        return BlockReference(self.name, self._context, self._stack, self._depth + 1)
+
+    @internalcode
+    def __call__(self):
+        rv = concat(self._stack[self._depth](self._context))
+        if self._context.eval_ctx.autoescape:
+            rv = Markup(rv)
+        return rv
+
+
+@implements_iterator
+class LoopContext:
+    """A wrapper iterable for dynamic ``for`` loops, with information
+    about the loop and iteration.
+    """
+
+    #: Current iteration of the loop, starting at 0.
+    index0 = -1
+
+    _length = None
+    _after = missing
+    _current = missing
+    _before = missing
+    _last_changed_value = missing
+
+    def __init__(self, iterable, undefined, recurse=None, depth0=0):
+        """
+        :param iterable: Iterable to wrap.
+        :param undefined: :class:`Undefined` class to use for next and
+            previous items.
+        :param recurse: The function to render the loop body when the
+            loop is marked recursive.
+        :param depth0: Incremented when looping recursively.
+        """
+        self._iterable = iterable
+        self._iterator = self._to_iterator(iterable)
+        self._undefined = undefined
+        self._recurse = recurse
+        #: How many levels deep a recursive loop currently is, starting at 0.
+        self.depth0 = depth0
+
+    @staticmethod
+    def _to_iterator(iterable):
+        return iter(iterable)
+
+    @property
+    def length(self):
+        """Length of the iterable.
+
+        If the iterable is a generator or otherwise does not have a
+        size, it is eagerly evaluated to get a size.
+        """
+        if self._length is not None:
+            return self._length
+
+        try:
+            self._length = len(self._iterable)
+        except TypeError:
+            iterable = list(self._iterator)
+            self._iterator = self._to_iterator(iterable)
+            self._length = len(iterable) + self.index + (self._after is not missing)
+
+        return self._length
+
+    def __len__(self):
+        return self.length
+
+    @property
+    def depth(self):
+        """How many levels deep a recursive loop currently is, starting at 1."""
+        return self.depth0 + 1
+
+    @property
+    def index(self):
+        """Current iteration of the loop, starting at 1."""
+        return self.index0 + 1
+
+    @property
+    def revindex0(self):
+        """Number of iterations from the end of the loop, ending at 0.
+
+        Requires calculating :attr:`length`.
+        """
+        return self.length - self.index
+
+    @property
+    def revindex(self):
+        """Number of iterations from the end of the loop, ending at 1.
+
+        Requires calculating :attr:`length`.
+        """
+        return self.length - self.index0
+
+    @property
+    def first(self):
+        """Whether this is the first iteration of the loop."""
+        return self.index0 == 0
+
+    def _peek_next(self):
+        """Return the next element in the iterable, or :data:`missing`
+        if the iterable is exhausted. Only peeks one item ahead, caching
+        the result in :attr:`_last` for use in subsequent checks. The
+        cache is reset when :meth:`__next__` is called.
+        """
+        if self._after is not missing:
+            return self._after
+
+        self._after = next(self._iterator, missing)
+        return self._after
+
+    @property
+    def last(self):
+        """Whether this is the last iteration of the loop.
+
+        Causes the iterable to advance early. See
+        :func:`itertools.groupby` for issues this can cause.
+        The :func:`groupby` filter avoids that issue.
+        """
+        return self._peek_next() is missing
+
+    @property
+    def previtem(self):
+        """The item in the previous iteration. Undefined during the
+        first iteration.
+        """
+        if self.first:
+            return self._undefined("there is no previous item")
+
+        return self._before
+
+    @property
+    def nextitem(self):
+        """The item in the next iteration. Undefined during the last
+        iteration.
+
+        Causes the iterable to advance early. See
+        :func:`itertools.groupby` for issues this can cause.
+        The :func:`groupby` filter avoids that issue.
+        """
+        rv = self._peek_next()
+
+        if rv is missing:
+            return self._undefined("there is no next item")
+
+        return rv
+
+    def cycle(self, *args):
+        """Return a value from the given args, cycling through based on
+        the current :attr:`index0`.
+
+        :param args: One or more values to cycle through.
+        """
+        if not args:
+            raise TypeError("no items for cycling given")
+
+        return args[self.index0 % len(args)]
+
+    def changed(self, *value):
+        """Return ``True`` if previously called with a different value
+        (including when called for the first time).
+
+        :param value: One or more values to compare to the last call.
+        """
+        if self._last_changed_value != value:
+            self._last_changed_value = value
+            return True
+
+        return False
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        if self._after is not missing:
+            rv = self._after
+            self._after = missing
+        else:
+            rv = next(self._iterator)
+
+        self.index0 += 1
+        self._before = self._current
+        self._current = rv
+        return rv, self
+
+    @internalcode
+    def __call__(self, iterable):
+        """When iterating over nested data, render the body of the loop
+        recursively with the given inner iterable data.
+
+        The loop must have the ``recursive`` marker for this to work.
+        """
+        if self._recurse is None:
+            raise TypeError(
+                "The loop must have the 'recursive' marker to be called recursively."
+            )
+
+        return self._recurse(iterable, self._recurse, depth=self.depth)
+
+    def __repr__(self):
+        return "<%s %d/%d>" % (self.__class__.__name__, self.index, self.length)
+
+
+class Macro(object):
+    """Wraps a macro function."""
+
+    def __init__(
+        self,
+        environment,
+        func,
+        name,
+        arguments,
+        catch_kwargs,
+        catch_varargs,
+        caller,
+        default_autoescape=None,
+    ):
+        self._environment = environment
+        self._func = func
+        self._argument_count = len(arguments)
+        self.name = name
+        self.arguments = arguments
+        self.catch_kwargs = catch_kwargs
+        self.catch_varargs = catch_varargs
+        self.caller = caller
+        self.explicit_caller = "caller" in arguments
+        if default_autoescape is None:
+            default_autoescape = environment.autoescape
+        self._default_autoescape = default_autoescape
+
+    @internalcode
+    @evalcontextfunction
+    def __call__(self, *args, **kwargs):
+        # This requires a bit of explanation,  In the past we used to
+        # decide largely based on compile-time information if a macro is
+        # safe or unsafe.  While there was a volatile mode it was largely
+        # unused for deciding on escaping.  This turns out to be
+        # problematic for macros because whether a macro is safe depends not
+        # on the escape mode when it was defined, but rather when it was used.
+        #
+        # Because however we export macros from the module system and
+        # there are historic callers that do not pass an eval context (and
+        # will continue to not pass one), we need to perform an instance
+        # check here.
+        #
+        # This is considered safe because an eval context is not a valid
+        # argument to callables otherwise anyway.  Worst case here is
+        # that if no eval context is passed we fall back to the compile
+        # time autoescape flag.
+        if args and isinstance(args[0], EvalContext):
+            autoescape = args[0].autoescape
+            args = args[1:]
+        else:
+            autoescape = self._default_autoescape
+
+        # try to consume the positional arguments
+        arguments = list(args[: self._argument_count])
+        off = len(arguments)
+
+        # For information why this is necessary refer to the handling
+        # of caller in the `macro_body` handler in the compiler.
+        found_caller = False
+
+        # if the number of arguments consumed is not the number of
+        # arguments expected we start filling in keyword arguments
+        # and defaults.
+        if off != self._argument_count:
+            for name in self.arguments[len(arguments) :]:
+                try:
+                    value = kwargs.pop(name)
+                except KeyError:
+                    value = missing
+                if name == "caller":
+                    found_caller = True
+                arguments.append(value)
+        else:
+            found_caller = self.explicit_caller
+
+        # it's important that the order of these arguments does not change
+        # if not also changed in the compiler's `function_scoping` method.
+        # the order is caller, keyword arguments, positional arguments!
+        if self.caller and not found_caller:
+            caller = kwargs.pop("caller", None)
+            if caller is None:
+                caller = self._environment.undefined("No caller defined", name="caller")
+            arguments.append(caller)
+
+        if self.catch_kwargs:
+            arguments.append(kwargs)
+        elif kwargs:
+            if "caller" in kwargs:
+                raise TypeError(
+                    "macro %r was invoked with two values for "
+                    "the special caller argument.  This is "
+                    "most likely a bug." % self.name
+                )
+            raise TypeError(
+                "macro %r takes no keyword argument %r"
+                % (self.name, next(iter(kwargs)))
+            )
+        if self.catch_varargs:
+            arguments.append(args[self._argument_count :])
+        elif len(args) > self._argument_count:
+            raise TypeError(
+                "macro %r takes not more than %d argument(s)"
+                % (self.name, len(self.arguments))
+            )
+
+        return self._invoke(arguments, autoescape)
+
+    def _invoke(self, arguments, autoescape):
+        """This method is being swapped out by the async implementation."""
+        rv = self._func(*arguments)
+        if autoescape:
+            rv = Markup(rv)
+        return rv
+
+    def __repr__(self):
+        return "<%s %s>" % (
+            self.__class__.__name__,
+            self.name is None and "anonymous" or repr(self.name),
+        )
+
+
+@implements_to_string
+class Undefined(object):
+    """The default undefined type.  This undefined type can be printed and
+    iterated over, but every other access will raise an :exc:`UndefinedError`:
+
+    >>> foo = Undefined(name='foo')
+    >>> str(foo)
+    ''
+    >>> not foo
+    True
+    >>> foo + 42
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+    """
+
+    __slots__ = (
+        "_undefined_hint",
+        "_undefined_obj",
+        "_undefined_name",
+        "_undefined_exception",
+    )
+
+    def __init__(self, hint=None, obj=missing, name=None, exc=UndefinedError):
+        self._undefined_hint = hint
+        self._undefined_obj = obj
+        self._undefined_name = name
+        self._undefined_exception = exc
+
+    @property
+    def _undefined_message(self):
+        """Build a message about the undefined value based on how it was
+        accessed.
+        """
+        if self._undefined_hint:
+            return self._undefined_hint
+
+        if self._undefined_obj is missing:
+            return "%r is undefined" % self._undefined_name
+
+        if not isinstance(self._undefined_name, string_types):
+            return "%s has no element %r" % (
+                object_type_repr(self._undefined_obj),
+                self._undefined_name,
+            )
+
+        return "%r has no attribute %r" % (
+            object_type_repr(self._undefined_obj),
+            self._undefined_name,
+        )
+
+    @internalcode
+    def _fail_with_undefined_error(self, *args, **kwargs):
+        """Raise an :exc:`UndefinedError` when operations are performed
+        on the undefined value.
+        """
+        raise self._undefined_exception(self._undefined_message)
+
+    @internalcode
+    def __getattr__(self, name):
+        if name[:2] == "__":
+            raise AttributeError(name)
+        return self._fail_with_undefined_error()
+
+    __add__ = (
+        __radd__
+    ) = (
+        __mul__
+    ) = (
+        __rmul__
+    ) = (
+        __div__
+    ) = (
+        __rdiv__
+    ) = (
+        __truediv__
+    ) = (
+        __rtruediv__
+    ) = (
+        __floordiv__
+    ) = (
+        __rfloordiv__
+    ) = (
+        __mod__
+    ) = (
+        __rmod__
+    ) = (
+        __pos__
+    ) = (
+        __neg__
+    ) = (
+        __call__
+    ) = (
+        __getitem__
+    ) = (
+        __lt__
+    ) = (
+        __le__
+    ) = (
+        __gt__
+    ) = (
+        __ge__
+    ) = (
+        __int__
+    ) = (
+        __float__
+    ) = (
+        __complex__
+    ) = __pow__ = __rpow__ = __sub__ = __rsub__ = _fail_with_undefined_error
+
+    def __eq__(self, other):
+        return type(self) is type(other)
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __hash__(self):
+        return id(type(self))
+
+    def __str__(self):
+        return u""
+
+    def __len__(self):
+        return 0
+
+    def __iter__(self):
+        if 0:
+            yield None
+
+    def __nonzero__(self):
+        return False
+
+    __bool__ = __nonzero__
+
+    def __repr__(self):
+        return "Undefined"
+
+
+def make_logging_undefined(logger=None, base=None):
+    """Given a logger object this returns a new undefined class that will
+    log certain failures.  It will log iterations and printing.  If no
+    logger is given a default logger is created.
+
+    Example::
+
+        logger = logging.getLogger(__name__)
+        LoggingUndefined = make_logging_undefined(
+            logger=logger,
+            base=Undefined
+        )
+
+    .. versionadded:: 2.8
+
+    :param logger: the logger to use.  If not provided, a default logger
+                   is created.
+    :param base: the base class to add logging functionality to.  This
+                 defaults to :class:`Undefined`.
+    """
+    if logger is None:
+        import logging
+
+        logger = logging.getLogger(__name__)
+        logger.addHandler(logging.StreamHandler(sys.stderr))
+    if base is None:
+        base = Undefined
+
+    def _log_message(undef):
+        if undef._undefined_hint is None:
+            if undef._undefined_obj is missing:
+                hint = "%s is undefined" % undef._undefined_name
+            elif not isinstance(undef._undefined_name, string_types):
+                hint = "%s has no element %s" % (
+                    object_type_repr(undef._undefined_obj),
+                    undef._undefined_name,
+                )
+            else:
+                hint = "%s has no attribute %s" % (
+                    object_type_repr(undef._undefined_obj),
+                    undef._undefined_name,
+                )
+        else:
+            hint = undef._undefined_hint
+        logger.warning("Template variable warning: %s", hint)
+
+    class LoggingUndefined(base):
+        def _fail_with_undefined_error(self, *args, **kwargs):
+            try:
+                return base._fail_with_undefined_error(self, *args, **kwargs)
+            except self._undefined_exception as e:
+                logger.error("Template variable error: %s", str(e))
+                raise e
+
+        def __str__(self):
+            rv = base.__str__(self)
+            _log_message(self)
+            return rv
+
+        def __iter__(self):
+            rv = base.__iter__(self)
+            _log_message(self)
+            return rv
+
+        if PY2:
+
+            def __nonzero__(self):
+                rv = base.__nonzero__(self)
+                _log_message(self)
+                return rv
+
+            def __unicode__(self):
+                rv = base.__unicode__(self)
+                _log_message(self)
+                return rv
+
+        else:
+
+            def __bool__(self):
+                rv = base.__bool__(self)
+                _log_message(self)
+                return rv
+
+    return LoggingUndefined
+
+
+# No @implements_to_string decorator here because __str__
+# is not overwritten from Undefined in this class.
+# This would cause a recursion error in Python 2.
+class ChainableUndefined(Undefined):
+    """An undefined that is chainable, where both ``__getattr__`` and
+    ``__getitem__`` return itself rather than raising an
+    :exc:`UndefinedError`.
+
+    >>> foo = ChainableUndefined(name='foo')
+    >>> str(foo.bar['baz'])
+    ''
+    >>> foo.bar['baz'] + 42
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+
+    .. versionadded:: 2.11.0
+    """
+
+    __slots__ = ()
+
+    def __html__(self):
+        return self.__str__()
+
+    def __getattr__(self, _):
+        return self
+
+    __getitem__ = __getattr__
+
+
+@implements_to_string
+class DebugUndefined(Undefined):
+    """An undefined that returns the debug info when printed.
+
+    >>> foo = DebugUndefined(name='foo')
+    >>> str(foo)
+    '{{ foo }}'
+    >>> not foo
+    True
+    >>> foo + 42
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+    """
+
+    __slots__ = ()
+
+    def __str__(self):
+        if self._undefined_hint is None:
+            if self._undefined_obj is missing:
+                return u"{{ %s }}" % self._undefined_name
+            return "{{ no such element: %s[%r] }}" % (
+                object_type_repr(self._undefined_obj),
+                self._undefined_name,
+            )
+        return u"{{ undefined value printed: %s }}" % self._undefined_hint
+
+
+@implements_to_string
+class StrictUndefined(Undefined):
+    """An undefined that barks on print and iteration as well as boolean
+    tests and all kinds of comparisons.  In other words: you can do nothing
+    with it except checking if it's defined using the `defined` test.
+
+    >>> foo = StrictUndefined(name='foo')
+    >>> str(foo)
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+    >>> not foo
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+    >>> foo + 42
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+    """
+
+    __slots__ = ()
+    __iter__ = (
+        __str__
+    ) = (
+        __len__
+    ) = (
+        __nonzero__
+    ) = __eq__ = __ne__ = __bool__ = __hash__ = Undefined._fail_with_undefined_error
+
+
+# remove remaining slots attributes, after the metaclass did the magic they
+# are unneeded and irritating as they contain wrong data for the subclasses.
+del (
+    Undefined.__slots__,
+    ChainableUndefined.__slots__,
+    DebugUndefined.__slots__,
+    StrictUndefined.__slots__,
+)
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/sandbox.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/sandbox.py
new file mode 100644
index 0000000..cfd7993
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/sandbox.py
@@ -0,0 +1,510 @@
+# -*- coding: utf-8 -*-
+"""A sandbox layer that ensures unsafe operations cannot be performed.
+Useful when the template itself comes from an untrusted source.
+"""
+import operator
+import types
+import warnings
+from collections import deque
+from string import Formatter
+
+from markupsafe import EscapeFormatter
+from markupsafe import Markup
+
+from ._compat import abc
+from ._compat import PY2
+from ._compat import range_type
+from ._compat import string_types
+from .environment import Environment
+from .exceptions import SecurityError
+
+#: maximum number of items a range may produce
+MAX_RANGE = 100000
+
+#: attributes of function objects that are considered unsafe.
+if PY2:
+    UNSAFE_FUNCTION_ATTRIBUTES = {
+        "func_closure",
+        "func_code",
+        "func_dict",
+        "func_defaults",
+        "func_globals",
+    }
+else:
+    # On versions > python 2 the special attributes on functions are gone,
+    # but they remain on methods and generators for whatever reason.
+    UNSAFE_FUNCTION_ATTRIBUTES = set()
+
+#: unsafe method attributes.  function attributes are unsafe for methods too
+UNSAFE_METHOD_ATTRIBUTES = {"im_class", "im_func", "im_self"}
+
+#: unsafe generator attributes.
+UNSAFE_GENERATOR_ATTRIBUTES = {"gi_frame", "gi_code"}
+
+#: unsafe attributes on coroutines
+UNSAFE_COROUTINE_ATTRIBUTES = {"cr_frame", "cr_code"}
+
+#: unsafe attributes on async generators
+UNSAFE_ASYNC_GENERATOR_ATTRIBUTES = {"ag_code", "ag_frame"}
+
+# make sure we don't warn in python 2.6 about stuff we don't care about
+warnings.filterwarnings(
+    "ignore", "the sets module", DeprecationWarning, module=__name__
+)
+
+_mutable_set_types = (set,)
+_mutable_mapping_types = (dict,)
+_mutable_sequence_types = (list,)
+
+# on python 2.x we can register the user collection types
+try:
+    from UserDict import UserDict, DictMixin
+    from UserList import UserList
+
+    _mutable_mapping_types += (UserDict, DictMixin)
+    _mutable_set_types += (UserList,)
+except ImportError:
+    pass
+
+# if sets is still available, register the mutable set from there as well
+try:
+    from sets import Set
+
+    _mutable_set_types += (Set,)
+except ImportError:
+    pass
+
+#: register Python 2.6 abstract base classes
+_mutable_set_types += (abc.MutableSet,)
+_mutable_mapping_types += (abc.MutableMapping,)
+_mutable_sequence_types += (abc.MutableSequence,)
+
+_mutable_spec = (
+    (
+        _mutable_set_types,
+        frozenset(
+            [
+                "add",
+                "clear",
+                "difference_update",
+                "discard",
+                "pop",
+                "remove",
+                "symmetric_difference_update",
+                "update",
+            ]
+        ),
+    ),
+    (
+        _mutable_mapping_types,
+        frozenset(["clear", "pop", "popitem", "setdefault", "update"]),
+    ),
+    (
+        _mutable_sequence_types,
+        frozenset(["append", "reverse", "insert", "sort", "extend", "remove"]),
+    ),
+    (
+        deque,
+        frozenset(
+            [
+                "append",
+                "appendleft",
+                "clear",
+                "extend",
+                "extendleft",
+                "pop",
+                "popleft",
+                "remove",
+                "rotate",
+            ]
+        ),
+    ),
+)
+
+
+class _MagicFormatMapping(abc.Mapping):
+    """This class implements a dummy wrapper to fix a bug in the Python
+    standard library for string formatting.
+
+    See https://bugs.python.org/issue13598 for information about why
+    this is necessary.
+    """
+
+    def __init__(self, args, kwargs):
+        self._args = args
+        self._kwargs = kwargs
+        self._last_index = 0
+
+    def __getitem__(self, key):
+        if key == "":
+            idx = self._last_index
+            self._last_index += 1
+            try:
+                return self._args[idx]
+            except LookupError:
+                pass
+            key = str(idx)
+        return self._kwargs[key]
+
+    def __iter__(self):
+        return iter(self._kwargs)
+
+    def __len__(self):
+        return len(self._kwargs)
+
+
+def inspect_format_method(callable):
+    if not isinstance(
+        callable, (types.MethodType, types.BuiltinMethodType)
+    ) or callable.__name__ not in ("format", "format_map"):
+        return None
+    obj = callable.__self__
+    if isinstance(obj, string_types):
+        return obj
+
+
+def safe_range(*args):
+    """A range that can't generate ranges with a length of more than
+    MAX_RANGE items.
+    """
+    rng = range_type(*args)
+
+    if len(rng) > MAX_RANGE:
+        raise OverflowError(
+            "Range too big. The sandbox blocks ranges larger than"
+            " MAX_RANGE (%d)." % MAX_RANGE
+        )
+
+    return rng
+
+
+def unsafe(f):
+    """Marks a function or method as unsafe.
+
+    ::
+
+        @unsafe
+        def delete(self):
+            pass
+    """
+    f.unsafe_callable = True
+    return f
+
+
+def is_internal_attribute(obj, attr):
+    """Test if the attribute given is an internal python attribute.  For
+    example this function returns `True` for the `func_code` attribute of
+    python objects.  This is useful if the environment method
+    :meth:`~SandboxedEnvironment.is_safe_attribute` is overridden.
+
+    >>> from jinja2.sandbox import is_internal_attribute
+    >>> is_internal_attribute(str, "mro")
+    True
+    >>> is_internal_attribute(str, "upper")
+    False
+    """
+    if isinstance(obj, types.FunctionType):
+        if attr in UNSAFE_FUNCTION_ATTRIBUTES:
+            return True
+    elif isinstance(obj, types.MethodType):
+        if attr in UNSAFE_FUNCTION_ATTRIBUTES or attr in UNSAFE_METHOD_ATTRIBUTES:
+            return True
+    elif isinstance(obj, type):
+        if attr == "mro":
+            return True
+    elif isinstance(obj, (types.CodeType, types.TracebackType, types.FrameType)):
+        return True
+    elif isinstance(obj, types.GeneratorType):
+        if attr in UNSAFE_GENERATOR_ATTRIBUTES:
+            return True
+    elif hasattr(types, "CoroutineType") and isinstance(obj, types.CoroutineType):
+        if attr in UNSAFE_COROUTINE_ATTRIBUTES:
+            return True
+    elif hasattr(types, "AsyncGeneratorType") and isinstance(
+        obj, types.AsyncGeneratorType
+    ):
+        if attr in UNSAFE_ASYNC_GENERATOR_ATTRIBUTES:
+            return True
+    return attr.startswith("__")
+
+
+def modifies_known_mutable(obj, attr):
+    """This function checks if an attribute on a builtin mutable object
+    (list, dict, set or deque) would modify it if called.  It also supports
+    the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and
+    with Python 2.6 onwards the abstract base classes `MutableSet`,
+    `MutableMapping`, and `MutableSequence`.
+
+    >>> modifies_known_mutable({}, "clear")
+    True
+    >>> modifies_known_mutable({}, "keys")
+    False
+    >>> modifies_known_mutable([], "append")
+    True
+    >>> modifies_known_mutable([], "index")
+    False
+
+    If called with an unsupported object (such as unicode) `False` is
+    returned.
+
+    >>> modifies_known_mutable("foo", "upper")
+    False
+    """
+    for typespec, unsafe in _mutable_spec:
+        if isinstance(obj, typespec):
+            return attr in unsafe
+    return False
+
+
+class SandboxedEnvironment(Environment):
+    """The sandboxed environment.  It works like the regular environment but
+    tells the compiler to generate sandboxed code.  Additionally subclasses of
+    this environment may override the methods that tell the runtime what
+    attributes or functions are safe to access.
+
+    If the template tries to access insecure code a :exc:`SecurityError` is
+    raised.  However also other exceptions may occur during the rendering so
+    the caller has to ensure that all exceptions are caught.
+    """
+
+    sandboxed = True
+
+    #: default callback table for the binary operators.  A copy of this is
+    #: available on each instance of a sandboxed environment as
+    #: :attr:`binop_table`
+    default_binop_table = {
+        "+": operator.add,
+        "-": operator.sub,
+        "*": operator.mul,
+        "/": operator.truediv,
+        "//": operator.floordiv,
+        "**": operator.pow,
+        "%": operator.mod,
+    }
+
+    #: default callback table for the unary operators.  A copy of this is
+    #: available on each instance of a sandboxed environment as
+    #: :attr:`unop_table`
+    default_unop_table = {"+": operator.pos, "-": operator.neg}
+
+    #: a set of binary operators that should be intercepted.  Each operator
+    #: that is added to this set (empty by default) is delegated to the
+    #: :meth:`call_binop` method that will perform the operator.  The default
+    #: operator callback is specified by :attr:`binop_table`.
+    #:
+    #: The following binary operators are interceptable:
+    #: ``//``, ``%``, ``+``, ``*``, ``-``, ``/``, and ``**``
+    #:
+    #: The default operation form the operator table corresponds to the
+    #: builtin function.  Intercepted calls are always slower than the native
+    #: operator call, so make sure only to intercept the ones you are
+    #: interested in.
+    #:
+    #: .. versionadded:: 2.6
+    intercepted_binops = frozenset()
+
+    #: a set of unary operators that should be intercepted.  Each operator
+    #: that is added to this set (empty by default) is delegated to the
+    #: :meth:`call_unop` method that will perform the operator.  The default
+    #: operator callback is specified by :attr:`unop_table`.
+    #:
+    #: The following unary operators are interceptable: ``+``, ``-``
+    #:
+    #: The default operation form the operator table corresponds to the
+    #: builtin function.  Intercepted calls are always slower than the native
+    #: operator call, so make sure only to intercept the ones you are
+    #: interested in.
+    #:
+    #: .. versionadded:: 2.6
+    intercepted_unops = frozenset()
+
+    def intercept_unop(self, operator):
+        """Called during template compilation with the name of a unary
+        operator to check if it should be intercepted at runtime.  If this
+        method returns `True`, :meth:`call_unop` is executed for this unary
+        operator.  The default implementation of :meth:`call_unop` will use
+        the :attr:`unop_table` dictionary to perform the operator with the
+        same logic as the builtin one.
+
+        The following unary operators are interceptable: ``+`` and ``-``
+
+        Intercepted calls are always slower than the native operator call,
+        so make sure only to intercept the ones you are interested in.
+
+        .. versionadded:: 2.6
+        """
+        return False
+
+    def __init__(self, *args, **kwargs):
+        Environment.__init__(self, *args, **kwargs)
+        self.globals["range"] = safe_range
+        self.binop_table = self.default_binop_table.copy()
+        self.unop_table = self.default_unop_table.copy()
+
+    def is_safe_attribute(self, obj, attr, value):
+        """The sandboxed environment will call this method to check if the
+        attribute of an object is safe to access.  Per default all attributes
+        starting with an underscore are considered private as well as the
+        special attributes of internal python objects as returned by the
+        :func:`is_internal_attribute` function.
+        """
+        return not (attr.startswith("_") or is_internal_attribute(obj, attr))
+
+    def is_safe_callable(self, obj):
+        """Check if an object is safely callable.  Per default a function is
+        considered safe unless the `unsafe_callable` attribute exists and is
+        True.  Override this method to alter the behavior, but this won't
+        affect the `unsafe` decorator from this module.
+        """
+        return not (
+            getattr(obj, "unsafe_callable", False) or getattr(obj, "alters_data", False)
+        )
+
+    def call_binop(self, context, operator, left, right):
+        """For intercepted binary operator calls (:meth:`intercepted_binops`)
+        this function is executed instead of the builtin operator.  This can
+        be used to fine tune the behavior of certain operators.
+
+        .. versionadded:: 2.6
+        """
+        return self.binop_table[operator](left, right)
+
+    def call_unop(self, context, operator, arg):
+        """For intercepted unary operator calls (:meth:`intercepted_unops`)
+        this function is executed instead of the builtin operator.  This can
+        be used to fine tune the behavior of certain operators.
+
+        .. versionadded:: 2.6
+        """
+        return self.unop_table[operator](arg)
+
+    def getitem(self, obj, argument):
+        """Subscribe an object from sandboxed code."""
+        try:
+            return obj[argument]
+        except (TypeError, LookupError):
+            if isinstance(argument, string_types):
+                try:
+                    attr = str(argument)
+                except Exception:
+                    pass
+                else:
+                    try:
+                        value = getattr(obj, attr)
+                    except AttributeError:
+                        pass
+                    else:
+                        if self.is_safe_attribute(obj, argument, value):
+                            return value
+                        return self.unsafe_undefined(obj, argument)
+        return self.undefined(obj=obj, name=argument)
+
+    def getattr(self, obj, attribute):
+        """Subscribe an object from sandboxed code and prefer the
+        attribute.  The attribute passed *must* be a bytestring.
+        """
+        try:
+            value = getattr(obj, attribute)
+        except AttributeError:
+            try:
+                return obj[attribute]
+            except (TypeError, LookupError):
+                pass
+        else:
+            if self.is_safe_attribute(obj, attribute, value):
+                return value
+            return self.unsafe_undefined(obj, attribute)
+        return self.undefined(obj=obj, name=attribute)
+
+    def unsafe_undefined(self, obj, attribute):
+        """Return an undefined object for unsafe attributes."""
+        return self.undefined(
+            "access to attribute %r of %r "
+            "object is unsafe." % (attribute, obj.__class__.__name__),
+            name=attribute,
+            obj=obj,
+            exc=SecurityError,
+        )
+
+    def format_string(self, s, args, kwargs, format_func=None):
+        """If a format call is detected, then this is routed through this
+        method so that our safety sandbox can be used for it.
+        """
+        if isinstance(s, Markup):
+            formatter = SandboxedEscapeFormatter(self, s.escape)
+        else:
+            formatter = SandboxedFormatter(self)
+
+        if format_func is not None and format_func.__name__ == "format_map":
+            if len(args) != 1 or kwargs:
+                raise TypeError(
+                    "format_map() takes exactly one argument %d given"
+                    % (len(args) + (kwargs is not None))
+                )
+
+            kwargs = args[0]
+            args = None
+
+        kwargs = _MagicFormatMapping(args, kwargs)
+        rv = formatter.vformat(s, args, kwargs)
+        return type(s)(rv)
+
+    def call(__self, __context, __obj, *args, **kwargs):  # noqa: B902
+        """Call an object from sandboxed code."""
+        fmt = inspect_format_method(__obj)
+        if fmt is not None:
+            return __self.format_string(fmt, args, kwargs, __obj)
+
+        # the double prefixes are to avoid double keyword argument
+        # errors when proxying the call.
+        if not __self.is_safe_callable(__obj):
+            raise SecurityError("%r is not safely callable" % (__obj,))
+        return __context.call(__obj, *args, **kwargs)
+
+
+class ImmutableSandboxedEnvironment(SandboxedEnvironment):
+    """Works exactly like the regular `SandboxedEnvironment` but does not
+    permit modifications on the builtin mutable objects `list`, `set`, and
+    `dict` by using the :func:`modifies_known_mutable` function.
+    """
+
+    def is_safe_attribute(self, obj, attr, value):
+        if not SandboxedEnvironment.is_safe_attribute(self, obj, attr, value):
+            return False
+        return not modifies_known_mutable(obj, attr)
+
+
+# This really is not a public API apparently.
+try:
+    from _string import formatter_field_name_split
+except ImportError:
+
+    def formatter_field_name_split(field_name):
+        return field_name._formatter_field_name_split()
+
+
+class SandboxedFormatterMixin(object):
+    def __init__(self, env):
+        self._env = env
+
+    def get_field(self, field_name, args, kwargs):
+        first, rest = formatter_field_name_split(field_name)
+        obj = self.get_value(first, args, kwargs)
+        for is_attr, i in rest:
+            if is_attr:
+                obj = self._env.getattr(obj, i)
+            else:
+                obj = self._env.getitem(obj, i)
+        return obj, first
+
+
+class SandboxedFormatter(SandboxedFormatterMixin, Formatter):
+    def __init__(self, env):
+        SandboxedFormatterMixin.__init__(self, env)
+        Formatter.__init__(self)
+
+
+class SandboxedEscapeFormatter(SandboxedFormatterMixin, EscapeFormatter):
+    def __init__(self, env, escape):
+        SandboxedFormatterMixin.__init__(self, env)
+        EscapeFormatter.__init__(self, escape)
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/tests.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/tests.py
new file mode 100644
index 0000000..fabd4ce
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/tests.py
@@ -0,0 +1,215 @@
+# -*- coding: utf-8 -*-
+"""Built-in template tests used with the ``is`` operator."""
+import decimal
+import operator
+import re
+
+from ._compat import abc
+from ._compat import integer_types
+from ._compat import string_types
+from ._compat import text_type
+from .runtime import Undefined
+
+number_re = re.compile(r"^-?\d+(\.\d+)?$")
+regex_type = type(number_re)
+test_callable = callable
+
+
+def test_odd(value):
+    """Return true if the variable is odd."""
+    return value % 2 == 1
+
+
+def test_even(value):
+    """Return true if the variable is even."""
+    return value % 2 == 0
+
+
+def test_divisibleby(value, num):
+    """Check if a variable is divisible by a number."""
+    return value % num == 0
+
+
+def test_defined(value):
+    """Return true if the variable is defined:
+
+    .. sourcecode:: jinja
+
+        {% if variable is defined %}
+            value of variable: {{ variable }}
+        {% else %}
+            variable is not defined
+        {% endif %}
+
+    See the :func:`default` filter for a simple way to set undefined
+    variables.
+    """
+    return not isinstance(value, Undefined)
+
+
+def test_undefined(value):
+    """Like :func:`defined` but the other way round."""
+    return isinstance(value, Undefined)
+
+
+def test_none(value):
+    """Return true if the variable is none."""
+    return value is None
+
+
+def test_boolean(value):
+    """Return true if the object is a boolean value.
+
+    .. versionadded:: 2.11
+    """
+    return value is True or value is False
+
+
+def test_false(value):
+    """Return true if the object is False.
+
+    .. versionadded:: 2.11
+    """
+    return value is False
+
+
+def test_true(value):
+    """Return true if the object is True.
+
+    .. versionadded:: 2.11
+    """
+    return value is True
+
+
+# NOTE: The existing 'number' test matches booleans and floats
+def test_integer(value):
+    """Return true if the object is an integer.
+
+    .. versionadded:: 2.11
+    """
+    return isinstance(value, integer_types) and value is not True and value is not False
+
+
+# NOTE: The existing 'number' test matches booleans and integers
+def test_float(value):
+    """Return true if the object is a float.
+
+    .. versionadded:: 2.11
+    """
+    return isinstance(value, float)
+
+
+def test_lower(value):
+    """Return true if the variable is lowercased."""
+    return text_type(value).islower()
+
+
+def test_upper(value):
+    """Return true if the variable is uppercased."""
+    return text_type(value).isupper()
+
+
+def test_string(value):
+    """Return true if the object is a string."""
+    return isinstance(value, string_types)
+
+
+def test_mapping(value):
+    """Return true if the object is a mapping (dict etc.).
+
+    .. versionadded:: 2.6
+    """
+    return isinstance(value, abc.Mapping)
+
+
+def test_number(value):
+    """Return true if the variable is a number."""
+    return isinstance(value, integer_types + (float, complex, decimal.Decimal))
+
+
+def test_sequence(value):
+    """Return true if the variable is a sequence. Sequences are variables
+    that are iterable.
+    """
+    try:
+        len(value)
+        value.__getitem__
+    except Exception:
+        return False
+    return True
+
+
+def test_sameas(value, other):
+    """Check if an object points to the same memory address than another
+    object:
+
+    .. sourcecode:: jinja
+
+        {% if foo.attribute is sameas false %}
+            the foo attribute really is the `False` singleton
+        {% endif %}
+    """
+    return value is other
+
+
+def test_iterable(value):
+    """Check if it's possible to iterate over an object."""
+    try:
+        iter(value)
+    except TypeError:
+        return False
+    return True
+
+
+def test_escaped(value):
+    """Check if the value is escaped."""
+    return hasattr(value, "__html__")
+
+
+def test_in(value, seq):
+    """Check if value is in seq.
+
+    .. versionadded:: 2.10
+    """
+    return value in seq
+
+
+TESTS = {
+    "odd": test_odd,
+    "even": test_even,
+    "divisibleby": test_divisibleby,
+    "defined": test_defined,
+    "undefined": test_undefined,
+    "none": test_none,
+    "boolean": test_boolean,
+    "false": test_false,
+    "true": test_true,
+    "integer": test_integer,
+    "float": test_float,
+    "lower": test_lower,
+    "upper": test_upper,
+    "string": test_string,
+    "mapping": test_mapping,
+    "number": test_number,
+    "sequence": test_sequence,
+    "iterable": test_iterable,
+    "callable": test_callable,
+    "sameas": test_sameas,
+    "escaped": test_escaped,
+    "in": test_in,
+    "==": operator.eq,
+    "eq": operator.eq,
+    "equalto": operator.eq,
+    "!=": operator.ne,
+    "ne": operator.ne,
+    ">": operator.gt,
+    "gt": operator.gt,
+    "greaterthan": operator.gt,
+    "ge": operator.ge,
+    ">=": operator.ge,
+    "<": operator.lt,
+    "lt": operator.lt,
+    "lessthan": operator.lt,
+    "<=": operator.le,
+    "le": operator.le,
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/utils.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/utils.py
new file mode 100644
index 0000000..b422ba9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/utils.py
@@ -0,0 +1,732 @@
+# -*- coding: utf-8 -*-
+import json
+import os
+import re
+import warnings
+from collections import deque
+from random import choice
+from random import randrange
+from threading import Lock
+
+from markupsafe import escape
+from markupsafe import Markup
+
+from ._compat import abc
+from ._compat import string_types
+from ._compat import text_type
+from ._compat import url_quote
+
+_word_split_re = re.compile(r"(\s+)")
+_punctuation_re = re.compile(
+    "^(?P<lead>(?:%s)*)(?P<middle>.*?)(?P<trail>(?:%s)*)$"
+    % (
+        "|".join(map(re.escape, ("(", "<", "&lt;"))),
+        "|".join(map(re.escape, (".", ",", ")", ">", "\n", "&gt;"))),
+    )
+)
+_simple_email_re = re.compile(r"^\S+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9._-]+$")
+_striptags_re = re.compile(r"(<!--.*?-->|<[^>]*>)")
+_entity_re = re.compile(r"&([^;]+);")
+_letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+_digits = "0123456789"
+
+# special singleton representing missing values for the runtime
+missing = type("MissingType", (), {"__repr__": lambda x: "missing"})()
+
+# internal code
+internal_code = set()
+
+concat = u"".join
+
+_slash_escape = "\\/" not in json.dumps("/")
+
+
+def contextfunction(f):
+    """This decorator can be used to mark a function or method context callable.
+    A context callable is passed the active :class:`Context` as first argument when
+    called from the template.  This is useful if a function wants to get access
+    to the context or functions provided on the context object.  For example
+    a function that returns a sorted list of template variables the current
+    template exports could look like this::
+
+        @contextfunction
+        def get_exported_names(context):
+            return sorted(context.exported_vars)
+    """
+    f.contextfunction = True
+    return f
+
+
+def evalcontextfunction(f):
+    """This decorator can be used to mark a function or method as an eval
+    context callable.  This is similar to the :func:`contextfunction`
+    but instead of passing the context, an evaluation context object is
+    passed.  For more information about the eval context, see
+    :ref:`eval-context`.
+
+    .. versionadded:: 2.4
+    """
+    f.evalcontextfunction = True
+    return f
+
+
+def environmentfunction(f):
+    """This decorator can be used to mark a function or method as environment
+    callable.  This decorator works exactly like the :func:`contextfunction`
+    decorator just that the first argument is the active :class:`Environment`
+    and not context.
+    """
+    f.environmentfunction = True
+    return f
+
+
+def internalcode(f):
+    """Marks the function as internally used"""
+    internal_code.add(f.__code__)
+    return f
+
+
+def is_undefined(obj):
+    """Check if the object passed is undefined.  This does nothing more than
+    performing an instance check against :class:`Undefined` but looks nicer.
+    This can be used for custom filters or tests that want to react to
+    undefined variables.  For example a custom default filter can look like
+    this::
+
+        def default(var, default=''):
+            if is_undefined(var):
+                return default
+            return var
+    """
+    from .runtime import Undefined
+
+    return isinstance(obj, Undefined)
+
+
+def consume(iterable):
+    """Consumes an iterable without doing anything with it."""
+    for _ in iterable:
+        pass
+
+
+def clear_caches():
+    """Jinja keeps internal caches for environments and lexers.  These are
+    used so that Jinja doesn't have to recreate environments and lexers all
+    the time.  Normally you don't have to care about that but if you are
+    measuring memory consumption you may want to clean the caches.
+    """
+    from .environment import _spontaneous_environments
+    from .lexer import _lexer_cache
+
+    _spontaneous_environments.clear()
+    _lexer_cache.clear()
+
+
+def import_string(import_name, silent=False):
+    """Imports an object based on a string.  This is useful if you want to
+    use import paths as endpoints or something similar.  An import path can
+    be specified either in dotted notation (``xml.sax.saxutils.escape``)
+    or with a colon as object delimiter (``xml.sax.saxutils:escape``).
+
+    If the `silent` is True the return value will be `None` if the import
+    fails.
+
+    :return: imported object
+    """
+    try:
+        if ":" in import_name:
+            module, obj = import_name.split(":", 1)
+        elif "." in import_name:
+            module, _, obj = import_name.rpartition(".")
+        else:
+            return __import__(import_name)
+        return getattr(__import__(module, None, None, [obj]), obj)
+    except (ImportError, AttributeError):
+        if not silent:
+            raise
+
+
+def open_if_exists(filename, mode="rb"):
+    """Returns a file descriptor for the filename if that file exists,
+    otherwise ``None``.
+    """
+    if not os.path.isfile(filename):
+        return None
+
+    return open(filename, mode)
+
+
+def object_type_repr(obj):
+    """Returns the name of the object's type.  For some recognized
+    singletons the name of the object is returned instead. (For
+    example for `None` and `Ellipsis`).
+    """
+    if obj is None:
+        return "None"
+    elif obj is Ellipsis:
+        return "Ellipsis"
+
+    cls = type(obj)
+
+    # __builtin__ in 2.x, builtins in 3.x
+    if cls.__module__ in ("__builtin__", "builtins"):
+        name = cls.__name__
+    else:
+        name = cls.__module__ + "." + cls.__name__
+
+    return "%s object" % name
+
+
+def pformat(obj, verbose=False):
+    """Prettyprint an object.  Either use the `pretty` library or the
+    builtin `pprint`.
+    """
+    try:
+        from pretty import pretty
+
+        return pretty(obj, verbose=verbose)
+    except ImportError:
+        from pprint import pformat
+
+        return pformat(obj)
+
+
+def urlize(text, trim_url_limit=None, rel=None, target=None):
+    """Converts any URLs in text into clickable links. Works on http://,
+    https:// and www. links. Links can have trailing punctuation (periods,
+    commas, close-parens) and leading punctuation (opening parens) and
+    it'll still do the right thing.
+
+    If trim_url_limit is not None, the URLs in link text will be limited
+    to trim_url_limit characters.
+
+    If nofollow is True, the URLs in link text will get a rel="nofollow"
+    attribute.
+
+    If target is not None, a target attribute will be added to the link.
+    """
+    trim_url = (
+        lambda x, limit=trim_url_limit: limit is not None
+        and (x[:limit] + (len(x) >= limit and "..." or ""))
+        or x
+    )
+    words = _word_split_re.split(text_type(escape(text)))
+    rel_attr = rel and ' rel="%s"' % text_type(escape(rel)) or ""
+    target_attr = target and ' target="%s"' % escape(target) or ""
+
+    for i, word in enumerate(words):
+        match = _punctuation_re.match(word)
+        if match:
+            lead, middle, trail = match.groups()
+            if middle.startswith("www.") or (
+                "@" not in middle
+                and not middle.startswith("http://")
+                and not middle.startswith("https://")
+                and len(middle) > 0
+                and middle[0] in _letters + _digits
+                and (
+                    middle.endswith(".org")
+                    or middle.endswith(".net")
+                    or middle.endswith(".com")
+                )
+            ):
+                middle = '<a href="http://%s"%s%s>%s</a>' % (
+                    middle,
+                    rel_attr,
+                    target_attr,
+                    trim_url(middle),
+                )
+            if middle.startswith("http://") or middle.startswith("https://"):
+                middle = '<a href="%s"%s%s>%s</a>' % (
+                    middle,
+                    rel_attr,
+                    target_attr,
+                    trim_url(middle),
+                )
+            if (
+                "@" in middle
+                and not middle.startswith("www.")
+                and ":" not in middle
+                and _simple_email_re.match(middle)
+            ):
+                middle = '<a href="mailto:%s">%s</a>' % (middle, middle)
+            if lead + middle + trail != word:
+                words[i] = lead + middle + trail
+    return u"".join(words)
+
+
+def generate_lorem_ipsum(n=5, html=True, min=20, max=100):
+    """Generate some lorem ipsum for the template."""
+    from .constants import LOREM_IPSUM_WORDS
+
+    words = LOREM_IPSUM_WORDS.split()
+    result = []
+
+    for _ in range(n):
+        next_capitalized = True
+        last_comma = last_fullstop = 0
+        word = None
+        last = None
+        p = []
+
+        # each paragraph contains out of 20 to 100 words.
+        for idx, _ in enumerate(range(randrange(min, max))):
+            while True:
+                word = choice(words)
+                if word != last:
+                    last = word
+                    break
+            if next_capitalized:
+                word = word.capitalize()
+                next_capitalized = False
+            # add commas
+            if idx - randrange(3, 8) > last_comma:
+                last_comma = idx
+                last_fullstop += 2
+                word += ","
+            # add end of sentences
+            if idx - randrange(10, 20) > last_fullstop:
+                last_comma = last_fullstop = idx
+                word += "."
+                next_capitalized = True
+            p.append(word)
+
+        # ensure that the paragraph ends with a dot.
+        p = u" ".join(p)
+        if p.endswith(","):
+            p = p[:-1] + "."
+        elif not p.endswith("."):
+            p += "."
+        result.append(p)
+
+    if not html:
+        return u"\n\n".join(result)
+    return Markup(u"\n".join(u"<p>%s</p>" % escape(x) for x in result))
+
+
+def unicode_urlencode(obj, charset="utf-8", for_qs=False):
+    """Quote a string for use in a URL using the given charset.
+
+    This function is misnamed, it is a wrapper around
+    :func:`urllib.parse.quote`.
+
+    :param obj: String or bytes to quote. Other types are converted to
+        string then encoded to bytes using the given charset.
+    :param charset: Encode text to bytes using this charset.
+    :param for_qs: Quote "/" and use "+" for spaces.
+    """
+    if not isinstance(obj, string_types):
+        obj = text_type(obj)
+
+    if isinstance(obj, text_type):
+        obj = obj.encode(charset)
+
+    safe = b"" if for_qs else b"/"
+    rv = url_quote(obj, safe)
+
+    if not isinstance(rv, text_type):
+        rv = rv.decode("utf-8")
+
+    if for_qs:
+        rv = rv.replace("%20", "+")
+
+    return rv
+
+
+class LRUCache(object):
+    """A simple LRU Cache implementation."""
+
+    # this is fast for small capacities (something below 1000) but doesn't
+    # scale.  But as long as it's only used as storage for templates this
+    # won't do any harm.
+
+    def __init__(self, capacity):
+        self.capacity = capacity
+        self._mapping = {}
+        self._queue = deque()
+        self._postinit()
+
+    def _postinit(self):
+        # alias all queue methods for faster lookup
+        self._popleft = self._queue.popleft
+        self._pop = self._queue.pop
+        self._remove = self._queue.remove
+        self._wlock = Lock()
+        self._append = self._queue.append
+
+    def __getstate__(self):
+        return {
+            "capacity": self.capacity,
+            "_mapping": self._mapping,
+            "_queue": self._queue,
+        }
+
+    def __setstate__(self, d):
+        self.__dict__.update(d)
+        self._postinit()
+
+    def __getnewargs__(self):
+        return (self.capacity,)
+
+    def copy(self):
+        """Return a shallow copy of the instance."""
+        rv = self.__class__(self.capacity)
+        rv._mapping.update(self._mapping)
+        rv._queue.extend(self._queue)
+        return rv
+
+    def get(self, key, default=None):
+        """Return an item from the cache dict or `default`"""
+        try:
+            return self[key]
+        except KeyError:
+            return default
+
+    def setdefault(self, key, default=None):
+        """Set `default` if the key is not in the cache otherwise
+        leave unchanged. Return the value of this key.
+        """
+        try:
+            return self[key]
+        except KeyError:
+            self[key] = default
+            return default
+
+    def clear(self):
+        """Clear the cache."""
+        self._wlock.acquire()
+        try:
+            self._mapping.clear()
+            self._queue.clear()
+        finally:
+            self._wlock.release()
+
+    def __contains__(self, key):
+        """Check if a key exists in this cache."""
+        return key in self._mapping
+
+    def __len__(self):
+        """Return the current size of the cache."""
+        return len(self._mapping)
+
+    def __repr__(self):
+        return "<%s %r>" % (self.__class__.__name__, self._mapping)
+
+    def __getitem__(self, key):
+        """Get an item from the cache. Moves the item up so that it has the
+        highest priority then.
+
+        Raise a `KeyError` if it does not exist.
+        """
+        self._wlock.acquire()
+        try:
+            rv = self._mapping[key]
+            if self._queue[-1] != key:
+                try:
+                    self._remove(key)
+                except ValueError:
+                    # if something removed the key from the container
+                    # when we read, ignore the ValueError that we would
+                    # get otherwise.
+                    pass
+                self._append(key)
+            return rv
+        finally:
+            self._wlock.release()
+
+    def __setitem__(self, key, value):
+        """Sets the value for an item. Moves the item up so that it
+        has the highest priority then.
+        """
+        self._wlock.acquire()
+        try:
+            if key in self._mapping:
+                self._remove(key)
+            elif len(self._mapping) == self.capacity:
+                del self._mapping[self._popleft()]
+            self._append(key)
+            self._mapping[key] = value
+        finally:
+            self._wlock.release()
+
+    def __delitem__(self, key):
+        """Remove an item from the cache dict.
+        Raise a `KeyError` if it does not exist.
+        """
+        self._wlock.acquire()
+        try:
+            del self._mapping[key]
+            try:
+                self._remove(key)
+            except ValueError:
+                pass
+        finally:
+            self._wlock.release()
+
+    def items(self):
+        """Return a list of items."""
+        result = [(key, self._mapping[key]) for key in list(self._queue)]
+        result.reverse()
+        return result
+
+    def iteritems(self):
+        """Iterate over all items."""
+        warnings.warn(
+            "'iteritems()' will be removed in version 3.0. Use"
+            " 'iter(cache.items())' instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return iter(self.items())
+
+    def values(self):
+        """Return a list of all values."""
+        return [x[1] for x in self.items()]
+
+    def itervalue(self):
+        """Iterate over all values."""
+        warnings.warn(
+            "'itervalue()' will be removed in version 3.0. Use"
+            " 'iter(cache.values())' instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return iter(self.values())
+
+    def itervalues(self):
+        """Iterate over all values."""
+        warnings.warn(
+            "'itervalues()' will be removed in version 3.0. Use"
+            " 'iter(cache.values())' instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return iter(self.values())
+
+    def keys(self):
+        """Return a list of all keys ordered by most recent usage."""
+        return list(self)
+
+    def iterkeys(self):
+        """Iterate over all keys in the cache dict, ordered by
+        the most recent usage.
+        """
+        warnings.warn(
+            "'iterkeys()' will be removed in version 3.0. Use"
+            " 'iter(cache.keys())' instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return iter(self)
+
+    def __iter__(self):
+        return reversed(tuple(self._queue))
+
+    def __reversed__(self):
+        """Iterate over the keys in the cache dict, oldest items
+        coming first.
+        """
+        return iter(tuple(self._queue))
+
+    __copy__ = copy
+
+
+abc.MutableMapping.register(LRUCache)
+
+
+def select_autoescape(
+    enabled_extensions=("html", "htm", "xml"),
+    disabled_extensions=(),
+    default_for_string=True,
+    default=False,
+):
+    """Intelligently sets the initial value of autoescaping based on the
+    filename of the template.  This is the recommended way to configure
+    autoescaping if you do not want to write a custom function yourself.
+
+    If you want to enable it for all templates created from strings or
+    for all templates with `.html` and `.xml` extensions::
+
+        from jinja2 import Environment, select_autoescape
+        env = Environment(autoescape=select_autoescape(
+            enabled_extensions=('html', 'xml'),
+            default_for_string=True,
+        ))
+
+    Example configuration to turn it on at all times except if the template
+    ends with `.txt`::
+
+        from jinja2 import Environment, select_autoescape
+        env = Environment(autoescape=select_autoescape(
+            disabled_extensions=('txt',),
+            default_for_string=True,
+            default=True,
+        ))
+
+    The `enabled_extensions` is an iterable of all the extensions that
+    autoescaping should be enabled for.  Likewise `disabled_extensions` is
+    a list of all templates it should be disabled for.  If a template is
+    loaded from a string then the default from `default_for_string` is used.
+    If nothing matches then the initial value of autoescaping is set to the
+    value of `default`.
+
+    For security reasons this function operates case insensitive.
+
+    .. versionadded:: 2.9
+    """
+    enabled_patterns = tuple("." + x.lstrip(".").lower() for x in enabled_extensions)
+    disabled_patterns = tuple("." + x.lstrip(".").lower() for x in disabled_extensions)
+
+    def autoescape(template_name):
+        if template_name is None:
+            return default_for_string
+        template_name = template_name.lower()
+        if template_name.endswith(enabled_patterns):
+            return True
+        if template_name.endswith(disabled_patterns):
+            return False
+        return default
+
+    return autoescape
+
+
+def htmlsafe_json_dumps(obj, dumper=None, **kwargs):
+    """Works exactly like :func:`dumps` but is safe for use in ``<script>``
+    tags.  It accepts the same arguments and returns a JSON string.  Note that
+    this is available in templates through the ``|tojson`` filter which will
+    also mark the result as safe.  Due to how this function escapes certain
+    characters this is safe even if used outside of ``<script>`` tags.
+
+    The following characters are escaped in strings:
+
+    -   ``<``
+    -   ``>``
+    -   ``&``
+    -   ``'``
+
+    This makes it safe to embed such strings in any place in HTML with the
+    notable exception of double quoted attributes.  In that case single
+    quote your attributes or HTML escape it in addition.
+    """
+    if dumper is None:
+        dumper = json.dumps
+    rv = (
+        dumper(obj, **kwargs)
+        .replace(u"<", u"\\u003c")
+        .replace(u">", u"\\u003e")
+        .replace(u"&", u"\\u0026")
+        .replace(u"'", u"\\u0027")
+    )
+    return Markup(rv)
+
+
+class Cycler(object):
+    """Cycle through values by yield them one at a time, then restarting
+    once the end is reached. Available as ``cycler`` in templates.
+
+    Similar to ``loop.cycle``, but can be used outside loops or across
+    multiple loops. For example, render a list of folders and files in a
+    list, alternating giving them "odd" and "even" classes.
+
+    .. code-block:: html+jinja
+
+        {% set row_class = cycler("odd", "even") %}
+        <ul class="browser">
+        {% for folder in folders %}
+          <li class="folder {{ row_class.next() }}">{{ folder }}
+        {% endfor %}
+        {% for file in files %}
+          <li class="file {{ row_class.next() }}">{{ file }}
+        {% endfor %}
+        </ul>
+
+    :param items: Each positional argument will be yielded in the order
+        given for each cycle.
+
+    .. versionadded:: 2.1
+    """
+
+    def __init__(self, *items):
+        if not items:
+            raise RuntimeError("at least one item has to be provided")
+        self.items = items
+        self.pos = 0
+
+    def reset(self):
+        """Resets the current item to the first item."""
+        self.pos = 0
+
+    @property
+    def current(self):
+        """Return the current item. Equivalent to the item that will be
+        returned next time :meth:`next` is called.
+        """
+        return self.items[self.pos]
+
+    def next(self):
+        """Return the current item, then advance :attr:`current` to the
+        next item.
+        """
+        rv = self.current
+        self.pos = (self.pos + 1) % len(self.items)
+        return rv
+
+    __next__ = next
+
+
+class Joiner(object):
+    """A joining helper for templates."""
+
+    def __init__(self, sep=u", "):
+        self.sep = sep
+        self.used = False
+
+    def __call__(self):
+        if not self.used:
+            self.used = True
+            return u""
+        return self.sep
+
+
+class Namespace(object):
+    """A namespace object that can hold arbitrary attributes.  It may be
+    initialized from a dictionary or with keyword arguments."""
+
+    def __init__(*args, **kwargs):  # noqa: B902
+        self, args = args[0], args[1:]
+        self.__attrs = dict(*args, **kwargs)
+
+    def __getattribute__(self, name):
+        # __class__ is needed for the awaitable check in async mode
+        if name in {"_Namespace__attrs", "__class__"}:
+            return object.__getattribute__(self, name)
+        try:
+            return self.__attrs[name]
+        except KeyError:
+            raise AttributeError(name)
+
+    def __setitem__(self, name, value):
+        self.__attrs[name] = value
+
+    def __repr__(self):
+        return "<Namespace %r>" % self.__attrs
+
+
+# does this python version support async for in and async generators?
+try:
+    exec("async def _():\n async for _ in ():\n  yield _")
+    have_async_gen = True
+except SyntaxError:
+    have_async_gen = False
+
+
+def soft_unicode(s):
+    from markupsafe import soft_unicode
+
+    warnings.warn(
+        "'jinja2.utils.soft_unicode' will be removed in version 3.0."
+        " Use 'markupsafe.soft_unicode' instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return soft_unicode(s)
diff --git a/python3-vckonline/lib/python3.8/site-packages/jinja2/visitor.py b/python3-vckonline/lib/python3.8/site-packages/jinja2/visitor.py
new file mode 100644
index 0000000..d1365bf
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/jinja2/visitor.py
@@ -0,0 +1,81 @@
+# -*- coding: utf-8 -*-
+"""API for traversing the AST nodes. Implemented by the compiler and
+meta introspection.
+"""
+from .nodes import Node
+
+
+class NodeVisitor(object):
+    """Walks the abstract syntax tree and call visitor functions for every
+    node found.  The visitor functions may return values which will be
+    forwarded by the `visit` method.
+
+    Per default the visitor functions for the nodes are ``'visit_'`` +
+    class name of the node.  So a `TryFinally` node visit function would
+    be `visit_TryFinally`.  This behavior can be changed by overriding
+    the `get_visitor` function.  If no visitor function exists for a node
+    (return value `None`) the `generic_visit` visitor is used instead.
+    """
+
+    def get_visitor(self, node):
+        """Return the visitor function for this node or `None` if no visitor
+        exists for this node.  In that case the generic visit function is
+        used instead.
+        """
+        method = "visit_" + node.__class__.__name__
+        return getattr(self, method, None)
+
+    def visit(self, node, *args, **kwargs):
+        """Visit a node."""
+        f = self.get_visitor(node)
+        if f is not None:
+            return f(node, *args, **kwargs)
+        return self.generic_visit(node, *args, **kwargs)
+
+    def generic_visit(self, node, *args, **kwargs):
+        """Called if no explicit visitor function exists for a node."""
+        for node in node.iter_child_nodes():
+            self.visit(node, *args, **kwargs)
+
+
+class NodeTransformer(NodeVisitor):
+    """Walks the abstract syntax tree and allows modifications of nodes.
+
+    The `NodeTransformer` will walk the AST and use the return value of the
+    visitor functions to replace or remove the old node.  If the return
+    value of the visitor function is `None` the node will be removed
+    from the previous location otherwise it's replaced with the return
+    value.  The return value may be the original node in which case no
+    replacement takes place.
+    """
+
+    def generic_visit(self, node, *args, **kwargs):
+        for field, old_value in node.iter_fields():
+            if isinstance(old_value, list):
+                new_values = []
+                for value in old_value:
+                    if isinstance(value, Node):
+                        value = self.visit(value, *args, **kwargs)
+                        if value is None:
+                            continue
+                        elif not isinstance(value, Node):
+                            new_values.extend(value)
+                            continue
+                    new_values.append(value)
+                old_value[:] = new_values
+            elif isinstance(old_value, Node):
+                new_node = self.visit(old_value, *args, **kwargs)
+                if new_node is None:
+                    delattr(node, field)
+                else:
+                    setattr(node, field, new_node)
+        return node
+
+    def visit_list(self, node, *args, **kwargs):
+        """As transformers may return lists in some places this method
+        can be used to enforce a list as return value.
+        """
+        rv = self.visit(node, *args, **kwargs)
+        if not isinstance(rv, list):
+            rv = [rv]
+        return rv
diff --git a/python3-vckonline/lib/python3.8/site-packages/markupsafe/__init__.py b/python3-vckonline/lib/python3.8/site-packages/markupsafe/__init__.py
new file mode 100644
index 0000000..da05ed3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/markupsafe/__init__.py
@@ -0,0 +1,327 @@
+# -*- coding: utf-8 -*-
+"""
+markupsafe
+~~~~~~~~~~
+
+Implements an escape function and a Markup string to replace HTML
+special characters with safe representations.
+
+:copyright: 2010 Pallets
+:license: BSD-3-Clause
+"""
+import re
+import string
+
+from ._compat import int_types
+from ._compat import iteritems
+from ._compat import Mapping
+from ._compat import PY2
+from ._compat import string_types
+from ._compat import text_type
+from ._compat import unichr
+
+__version__ = "1.1.1"
+
+__all__ = ["Markup", "soft_unicode", "escape", "escape_silent"]
+
+_striptags_re = re.compile(r"(<!--.*?-->|<[^>]*>)")
+_entity_re = re.compile(r"&([^& ;]+);")
+
+
+class Markup(text_type):
+    """A string that is ready to be safely inserted into an HTML or XML
+    document, either because it was escaped or because it was marked
+    safe.
+
+    Passing an object to the constructor converts it to text and wraps
+    it to mark it safe without escaping. To escape the text, use the
+    :meth:`escape` class method instead.
+
+    >>> Markup('Hello, <em>World</em>!')
+    Markup('Hello, <em>World</em>!')
+    >>> Markup(42)
+    Markup('42')
+    >>> Markup.escape('Hello, <em>World</em>!')
+    Markup('Hello &lt;em&gt;World&lt;/em&gt;!')
+
+    This implements the ``__html__()`` interface that some frameworks
+    use. Passing an object that implements ``__html__()`` will wrap the
+    output of that method, marking it safe.
+
+    >>> class Foo:
+    ...     def __html__(self):
+    ...         return '<a href="/foo">foo</a>'
+    ...
+    >>> Markup(Foo())
+    Markup('<a href="/foo">foo</a>')
+
+    This is a subclass of the text type (``str`` in Python 3,
+    ``unicode`` in Python 2). It has the same methods as that type, but
+    all methods escape their arguments and return a ``Markup`` instance.
+
+    >>> Markup('<em>%s</em>') % 'foo & bar'
+    Markup('<em>foo &amp; bar</em>')
+    >>> Markup('<em>Hello</em> ') + '<foo>'
+    Markup('<em>Hello</em> &lt;foo&gt;')
+    """
+
+    __slots__ = ()
+
+    def __new__(cls, base=u"", encoding=None, errors="strict"):
+        if hasattr(base, "__html__"):
+            base = base.__html__()
+        if encoding is None:
+            return text_type.__new__(cls, base)
+        return text_type.__new__(cls, base, encoding, errors)
+
+    def __html__(self):
+        return self
+
+    def __add__(self, other):
+        if isinstance(other, string_types) or hasattr(other, "__html__"):
+            return self.__class__(super(Markup, self).__add__(self.escape(other)))
+        return NotImplemented
+
+    def __radd__(self, other):
+        if hasattr(other, "__html__") or isinstance(other, string_types):
+            return self.escape(other).__add__(self)
+        return NotImplemented
+
+    def __mul__(self, num):
+        if isinstance(num, int_types):
+            return self.__class__(text_type.__mul__(self, num))
+        return NotImplemented
+
+    __rmul__ = __mul__
+
+    def __mod__(self, arg):
+        if isinstance(arg, tuple):
+            arg = tuple(_MarkupEscapeHelper(x, self.escape) for x in arg)
+        else:
+            arg = _MarkupEscapeHelper(arg, self.escape)
+        return self.__class__(text_type.__mod__(self, arg))
+
+    def __repr__(self):
+        return "%s(%s)" % (self.__class__.__name__, text_type.__repr__(self))
+
+    def join(self, seq):
+        return self.__class__(text_type.join(self, map(self.escape, seq)))
+
+    join.__doc__ = text_type.join.__doc__
+
+    def split(self, *args, **kwargs):
+        return list(map(self.__class__, text_type.split(self, *args, **kwargs)))
+
+    split.__doc__ = text_type.split.__doc__
+
+    def rsplit(self, *args, **kwargs):
+        return list(map(self.__class__, text_type.rsplit(self, *args, **kwargs)))
+
+    rsplit.__doc__ = text_type.rsplit.__doc__
+
+    def splitlines(self, *args, **kwargs):
+        return list(map(self.__class__, text_type.splitlines(self, *args, **kwargs)))
+
+    splitlines.__doc__ = text_type.splitlines.__doc__
+
+    def unescape(self):
+        """Convert escaped markup back into a text string. This replaces
+        HTML entities with the characters they represent.
+
+        >>> Markup('Main &raquo; <em>About</em>').unescape()
+        'Main » <em>About</em>'
+        """
+        from ._constants import HTML_ENTITIES
+
+        def handle_match(m):
+            name = m.group(1)
+            if name in HTML_ENTITIES:
+                return unichr(HTML_ENTITIES[name])
+            try:
+                if name[:2] in ("#x", "#X"):
+                    return unichr(int(name[2:], 16))
+                elif name.startswith("#"):
+                    return unichr(int(name[1:]))
+            except ValueError:
+                pass
+            # Don't modify unexpected input.
+            return m.group()
+
+        return _entity_re.sub(handle_match, text_type(self))
+
+    def striptags(self):
+        """:meth:`unescape` the markup, remove tags, and normalize
+        whitespace to single spaces.
+
+        >>> Markup('Main &raquo;\t<em>About</em>').striptags()
+        'Main » About'
+        """
+        stripped = u" ".join(_striptags_re.sub("", self).split())
+        return Markup(stripped).unescape()
+
+    @classmethod
+    def escape(cls, s):
+        """Escape a string. Calls :func:`escape` and ensures that for
+        subclasses the correct type is returned.
+        """
+        rv = escape(s)
+        if rv.__class__ is not cls:
+            return cls(rv)
+        return rv
+
+    def make_simple_escaping_wrapper(name):  # noqa: B902
+        orig = getattr(text_type, name)
+
+        def func(self, *args, **kwargs):
+            args = _escape_argspec(list(args), enumerate(args), self.escape)
+            _escape_argspec(kwargs, iteritems(kwargs), self.escape)
+            return self.__class__(orig(self, *args, **kwargs))
+
+        func.__name__ = orig.__name__
+        func.__doc__ = orig.__doc__
+        return func
+
+    for method in (
+        "__getitem__",
+        "capitalize",
+        "title",
+        "lower",
+        "upper",
+        "replace",
+        "ljust",
+        "rjust",
+        "lstrip",
+        "rstrip",
+        "center",
+        "strip",
+        "translate",
+        "expandtabs",
+        "swapcase",
+        "zfill",
+    ):
+        locals()[method] = make_simple_escaping_wrapper(method)
+
+    def partition(self, sep):
+        return tuple(map(self.__class__, text_type.partition(self, self.escape(sep))))
+
+    def rpartition(self, sep):
+        return tuple(map(self.__class__, text_type.rpartition(self, self.escape(sep))))
+
+    def format(self, *args, **kwargs):
+        formatter = EscapeFormatter(self.escape)
+        kwargs = _MagicFormatMapping(args, kwargs)
+        return self.__class__(formatter.vformat(self, args, kwargs))
+
+    def __html_format__(self, format_spec):
+        if format_spec:
+            raise ValueError("Unsupported format specification " "for Markup.")
+        return self
+
+    # not in python 3
+    if hasattr(text_type, "__getslice__"):
+        __getslice__ = make_simple_escaping_wrapper("__getslice__")
+
+    del method, make_simple_escaping_wrapper
+
+
+class _MagicFormatMapping(Mapping):
+    """This class implements a dummy wrapper to fix a bug in the Python
+    standard library for string formatting.
+
+    See http://bugs.python.org/issue13598 for information about why
+    this is necessary.
+    """
+
+    def __init__(self, args, kwargs):
+        self._args = args
+        self._kwargs = kwargs
+        self._last_index = 0
+
+    def __getitem__(self, key):
+        if key == "":
+            idx = self._last_index
+            self._last_index += 1
+            try:
+                return self._args[idx]
+            except LookupError:
+                pass
+            key = str(idx)
+        return self._kwargs[key]
+
+    def __iter__(self):
+        return iter(self._kwargs)
+
+    def __len__(self):
+        return len(self._kwargs)
+
+
+if hasattr(text_type, "format"):
+
+    class EscapeFormatter(string.Formatter):
+        def __init__(self, escape):
+            self.escape = escape
+
+        def format_field(self, value, format_spec):
+            if hasattr(value, "__html_format__"):
+                rv = value.__html_format__(format_spec)
+            elif hasattr(value, "__html__"):
+                if format_spec:
+                    raise ValueError(
+                        "Format specifier {0} given, but {1} does not"
+                        " define __html_format__. A class that defines"
+                        " __html__ must define __html_format__ to work"
+                        " with format specifiers.".format(format_spec, type(value))
+                    )
+                rv = value.__html__()
+            else:
+                # We need to make sure the format spec is unicode here as
+                # otherwise the wrong callback methods are invoked.  For
+                # instance a byte string there would invoke __str__ and
+                # not __unicode__.
+                rv = string.Formatter.format_field(self, value, text_type(format_spec))
+            return text_type(self.escape(rv))
+
+
+def _escape_argspec(obj, iterable, escape):
+    """Helper for various string-wrapped functions."""
+    for key, value in iterable:
+        if hasattr(value, "__html__") or isinstance(value, string_types):
+            obj[key] = escape(value)
+    return obj
+
+
+class _MarkupEscapeHelper(object):
+    """Helper for Markup.__mod__"""
+
+    def __init__(self, obj, escape):
+        self.obj = obj
+        self.escape = escape
+
+    def __getitem__(self, item):
+        return _MarkupEscapeHelper(self.obj[item], self.escape)
+
+    def __str__(self):
+        return text_type(self.escape(self.obj))
+
+    __unicode__ = __str__
+
+    def __repr__(self):
+        return str(self.escape(repr(self.obj)))
+
+    def __int__(self):
+        return int(self.obj)
+
+    def __float__(self):
+        return float(self.obj)
+
+
+# we have to import it down here as the speedups and native
+# modules imports the markup type which is define above.
+try:
+    from ._speedups import escape, escape_silent, soft_unicode
+except ImportError:
+    from ._native import escape, escape_silent, soft_unicode
+
+if not PY2:
+    soft_str = soft_unicode
+    __all__.append("soft_str")
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diff --git a/python3-vckonline/lib/python3.8/site-packages/markupsafe/_compat.py b/python3-vckonline/lib/python3.8/site-packages/markupsafe/_compat.py
new file mode 100644
index 0000000..bc05090
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/markupsafe/_compat.py
@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+"""
+markupsafe._compat
+~~~~~~~~~~~~~~~~~~
+
+:copyright: 2010 Pallets
+:license: BSD-3-Clause
+"""
+import sys
+
+PY2 = sys.version_info[0] == 2
+
+if not PY2:
+    text_type = str
+    string_types = (str,)
+    unichr = chr
+    int_types = (int,)
+
+    def iteritems(x):
+        return iter(x.items())
+
+    from collections.abc import Mapping
+
+else:
+    text_type = unicode
+    string_types = (str, unicode)
+    unichr = unichr
+    int_types = (int, long)
+
+    def iteritems(x):
+        return x.iteritems()
+
+    from collections import Mapping
diff --git a/python3-vckonline/lib/python3.8/site-packages/markupsafe/_constants.py b/python3-vckonline/lib/python3.8/site-packages/markupsafe/_constants.py
new file mode 100644
index 0000000..7c57c2d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/markupsafe/_constants.py
@@ -0,0 +1,264 @@
+# -*- coding: utf-8 -*-
+"""
+markupsafe._constants
+~~~~~~~~~~~~~~~~~~~~~
+
+:copyright: 2010 Pallets
+:license: BSD-3-Clause
+"""
+
+HTML_ENTITIES = {
+    "AElig": 198,
+    "Aacute": 193,
+    "Acirc": 194,
+    "Agrave": 192,
+    "Alpha": 913,
+    "Aring": 197,
+    "Atilde": 195,
+    "Auml": 196,
+    "Beta": 914,
+    "Ccedil": 199,
+    "Chi": 935,
+    "Dagger": 8225,
+    "Delta": 916,
+    "ETH": 208,
+    "Eacute": 201,
+    "Ecirc": 202,
+    "Egrave": 200,
+    "Epsilon": 917,
+    "Eta": 919,
+    "Euml": 203,
+    "Gamma": 915,
+    "Iacute": 205,
+    "Icirc": 206,
+    "Igrave": 204,
+    "Iota": 921,
+    "Iuml": 207,
+    "Kappa": 922,
+    "Lambda": 923,
+    "Mu": 924,
+    "Ntilde": 209,
+    "Nu": 925,
+    "OElig": 338,
+    "Oacute": 211,
+    "Ocirc": 212,
+    "Ograve": 210,
+    "Omega": 937,
+    "Omicron": 927,
+    "Oslash": 216,
+    "Otilde": 213,
+    "Ouml": 214,
+    "Phi": 934,
+    "Pi": 928,
+    "Prime": 8243,
+    "Psi": 936,
+    "Rho": 929,
+    "Scaron": 352,
+    "Sigma": 931,
+    "THORN": 222,
+    "Tau": 932,
+    "Theta": 920,
+    "Uacute": 218,
+    "Ucirc": 219,
+    "Ugrave": 217,
+    "Upsilon": 933,
+    "Uuml": 220,
+    "Xi": 926,
+    "Yacute": 221,
+    "Yuml": 376,
+    "Zeta": 918,
+    "aacute": 225,
+    "acirc": 226,
+    "acute": 180,
+    "aelig": 230,
+    "agrave": 224,
+    "alefsym": 8501,
+    "alpha": 945,
+    "amp": 38,
+    "and": 8743,
+    "ang": 8736,
+    "apos": 39,
+    "aring": 229,
+    "asymp": 8776,
+    "atilde": 227,
+    "auml": 228,
+    "bdquo": 8222,
+    "beta": 946,
+    "brvbar": 166,
+    "bull": 8226,
+    "cap": 8745,
+    "ccedil": 231,
+    "cedil": 184,
+    "cent": 162,
+    "chi": 967,
+    "circ": 710,
+    "clubs": 9827,
+    "cong": 8773,
+    "copy": 169,
+    "crarr": 8629,
+    "cup": 8746,
+    "curren": 164,
+    "dArr": 8659,
+    "dagger": 8224,
+    "darr": 8595,
+    "deg": 176,
+    "delta": 948,
+    "diams": 9830,
+    "divide": 247,
+    "eacute": 233,
+    "ecirc": 234,
+    "egrave": 232,
+    "empty": 8709,
+    "emsp": 8195,
+    "ensp": 8194,
+    "epsilon": 949,
+    "equiv": 8801,
+    "eta": 951,
+    "eth": 240,
+    "euml": 235,
+    "euro": 8364,
+    "exist": 8707,
+    "fnof": 402,
+    "forall": 8704,
+    "frac12": 189,
+    "frac14": 188,
+    "frac34": 190,
+    "frasl": 8260,
+    "gamma": 947,
+    "ge": 8805,
+    "gt": 62,
+    "hArr": 8660,
+    "harr": 8596,
+    "hearts": 9829,
+    "hellip": 8230,
+    "iacute": 237,
+    "icirc": 238,
+    "iexcl": 161,
+    "igrave": 236,
+    "image": 8465,
+    "infin": 8734,
+    "int": 8747,
+    "iota": 953,
+    "iquest": 191,
+    "isin": 8712,
+    "iuml": 239,
+    "kappa": 954,
+    "lArr": 8656,
+    "lambda": 955,
+    "lang": 9001,
+    "laquo": 171,
+    "larr": 8592,
+    "lceil": 8968,
+    "ldquo": 8220,
+    "le": 8804,
+    "lfloor": 8970,
+    "lowast": 8727,
+    "loz": 9674,
+    "lrm": 8206,
+    "lsaquo": 8249,
+    "lsquo": 8216,
+    "lt": 60,
+    "macr": 175,
+    "mdash": 8212,
+    "micro": 181,
+    "middot": 183,
+    "minus": 8722,
+    "mu": 956,
+    "nabla": 8711,
+    "nbsp": 160,
+    "ndash": 8211,
+    "ne": 8800,
+    "ni": 8715,
+    "not": 172,
+    "notin": 8713,
+    "nsub": 8836,
+    "ntilde": 241,
+    "nu": 957,
+    "oacute": 243,
+    "ocirc": 244,
+    "oelig": 339,
+    "ograve": 242,
+    "oline": 8254,
+    "omega": 969,
+    "omicron": 959,
+    "oplus": 8853,
+    "or": 8744,
+    "ordf": 170,
+    "ordm": 186,
+    "oslash": 248,
+    "otilde": 245,
+    "otimes": 8855,
+    "ouml": 246,
+    "para": 182,
+    "part": 8706,
+    "permil": 8240,
+    "perp": 8869,
+    "phi": 966,
+    "pi": 960,
+    "piv": 982,
+    "plusmn": 177,
+    "pound": 163,
+    "prime": 8242,
+    "prod": 8719,
+    "prop": 8733,
+    "psi": 968,
+    "quot": 34,
+    "rArr": 8658,
+    "radic": 8730,
+    "rang": 9002,
+    "raquo": 187,
+    "rarr": 8594,
+    "rceil": 8969,
+    "rdquo": 8221,
+    "real": 8476,
+    "reg": 174,
+    "rfloor": 8971,
+    "rho": 961,
+    "rlm": 8207,
+    "rsaquo": 8250,
+    "rsquo": 8217,
+    "sbquo": 8218,
+    "scaron": 353,
+    "sdot": 8901,
+    "sect": 167,
+    "shy": 173,
+    "sigma": 963,
+    "sigmaf": 962,
+    "sim": 8764,
+    "spades": 9824,
+    "sub": 8834,
+    "sube": 8838,
+    "sum": 8721,
+    "sup": 8835,
+    "sup1": 185,
+    "sup2": 178,
+    "sup3": 179,
+    "supe": 8839,
+    "szlig": 223,
+    "tau": 964,
+    "there4": 8756,
+    "theta": 952,
+    "thetasym": 977,
+    "thinsp": 8201,
+    "thorn": 254,
+    "tilde": 732,
+    "times": 215,
+    "trade": 8482,
+    "uArr": 8657,
+    "uacute": 250,
+    "uarr": 8593,
+    "ucirc": 251,
+    "ugrave": 249,
+    "uml": 168,
+    "upsih": 978,
+    "upsilon": 965,
+    "uuml": 252,
+    "weierp": 8472,
+    "xi": 958,
+    "yacute": 253,
+    "yen": 165,
+    "yuml": 255,
+    "zeta": 950,
+    "zwj": 8205,
+    "zwnj": 8204,
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/markupsafe/_native.py b/python3-vckonline/lib/python3.8/site-packages/markupsafe/_native.py
new file mode 100644
index 0000000..cd08752
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/markupsafe/_native.py
@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+"""
+markupsafe._native
+~~~~~~~~~~~~~~~~~~
+
+Native Python implementation used when the C module is not compiled.
+
+:copyright: 2010 Pallets
+:license: BSD-3-Clause
+"""
+from . import Markup
+from ._compat import text_type
+
+
+def escape(s):
+    """Replace the characters ``&``, ``<``, ``>``, ``'``, and ``"`` in
+    the string with HTML-safe sequences. Use this if you need to display
+    text that might contain such characters in HTML.
+
+    If the object has an ``__html__`` method, it is called and the
+    return value is assumed to already be safe for HTML.
+
+    :param s: An object to be converted to a string and escaped.
+    :return: A :class:`Markup` string with the escaped text.
+    """
+    if hasattr(s, "__html__"):
+        return Markup(s.__html__())
+    return Markup(
+        text_type(s)
+        .replace("&", "&amp;")
+        .replace(">", "&gt;")
+        .replace("<", "&lt;")
+        .replace("'", "&#39;")
+        .replace('"', "&#34;")
+    )
+
+
+def escape_silent(s):
+    """Like :func:`escape` but treats ``None`` as the empty string.
+    Useful with optional values, as otherwise you get the string
+    ``'None'`` when the value is ``None``.
+
+    >>> escape(None)
+    Markup('None')
+    >>> escape_silent(None)
+    Markup('')
+    """
+    if s is None:
+        return Markup()
+    return escape(s)
+
+
+def soft_unicode(s):
+    """Convert an object to a string if it isn't already. This preserves
+    a :class:`Markup` string rather than converting it back to a basic
+    string, so it will still be marked as safe and won't be escaped
+    again.
+
+    >>> value = escape('<User 1>')
+    >>> value
+    Markup('&lt;User 1&gt;')
+    >>> escape(str(value))
+    Markup('&amp;lt;User 1&amp;gt;')
+    >>> escape(soft_unicode(value))
+    Markup('&lt;User 1&gt;')
+    """
+    if not isinstance(s, text_type):
+        s = text_type(s)
+    return s
diff --git a/python3-vckonline/lib/python3.8/site-packages/markupsafe/_speedups.c b/python3-vckonline/lib/python3.8/site-packages/markupsafe/_speedups.c
new file mode 100644
index 0000000..12d2c4a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/markupsafe/_speedups.c
@@ -0,0 +1,423 @@
+/**
+ * markupsafe._speedups
+ * ~~~~~~~~~~~~~~~~~~~~
+ *
+ * C implementation of escaping for better performance. Used instead of
+ * the native Python implementation when compiled.
+ *
+ * :copyright: 2010 Pallets
+ * :license: BSD-3-Clause
+ */
+#include <Python.h>
+
+#if PY_MAJOR_VERSION < 3
+#define ESCAPED_CHARS_TABLE_SIZE 63
+#define UNICHR(x) (PyUnicode_AS_UNICODE((PyUnicodeObject*)PyUnicode_DecodeASCII(x, strlen(x), NULL)));
+
+static Py_ssize_t escaped_chars_delta_len[ESCAPED_CHARS_TABLE_SIZE];
+static Py_UNICODE *escaped_chars_repl[ESCAPED_CHARS_TABLE_SIZE];
+#endif
+
+static PyObject* markup;
+
+static int
+init_constants(void)
+{
+	PyObject *module;
+
+#if PY_MAJOR_VERSION < 3
+	/* mapping of characters to replace */
+	escaped_chars_repl['"'] = UNICHR("&#34;");
+	escaped_chars_repl['\''] = UNICHR("&#39;");
+	escaped_chars_repl['&'] = UNICHR("&amp;");
+	escaped_chars_repl['<'] = UNICHR("&lt;");
+	escaped_chars_repl['>'] = UNICHR("&gt;");
+
+	/* lengths of those characters when replaced - 1 */
+	memset(escaped_chars_delta_len, 0, sizeof (escaped_chars_delta_len));
+	escaped_chars_delta_len['"'] = escaped_chars_delta_len['\''] = \
+		escaped_chars_delta_len['&'] = 4;
+	escaped_chars_delta_len['<'] = escaped_chars_delta_len['>'] = 3;
+#endif
+
+	/* import markup type so that we can mark the return value */
+	module = PyImport_ImportModule("markupsafe");
+	if (!module)
+		return 0;
+	markup = PyObject_GetAttrString(module, "Markup");
+	Py_DECREF(module);
+
+	return 1;
+}
+
+#if PY_MAJOR_VERSION < 3
+static PyObject*
+escape_unicode(PyUnicodeObject *in)
+{
+	PyUnicodeObject *out;
+	Py_UNICODE *inp = PyUnicode_AS_UNICODE(in);
+	const Py_UNICODE *inp_end = PyUnicode_AS_UNICODE(in) + PyUnicode_GET_SIZE(in);
+	Py_UNICODE *next_escp;
+	Py_UNICODE *outp;
+	Py_ssize_t delta=0, erepl=0, delta_len=0;
+
+	/* First we need to figure out how long the escaped string will be */
+	while (*(inp) || inp < inp_end) {
+		if (*inp < ESCAPED_CHARS_TABLE_SIZE) {
+			delta += escaped_chars_delta_len[*inp];
+			erepl += !!escaped_chars_delta_len[*inp];
+		}
+		++inp;
+	}
+
+	/* Do we need to escape anything at all? */
+	if (!erepl) {
+		Py_INCREF(in);
+		return (PyObject*)in;
+	}
+
+	out = (PyUnicodeObject*)PyUnicode_FromUnicode(NULL, PyUnicode_GET_SIZE(in) + delta);
+	if (!out)
+		return NULL;
+
+	outp = PyUnicode_AS_UNICODE(out);
+	inp = PyUnicode_AS_UNICODE(in);
+	while (erepl-- > 0) {
+		/* look for the next substitution */
+		next_escp = inp;
+		while (next_escp < inp_end) {
+			if (*next_escp < ESCAPED_CHARS_TABLE_SIZE &&
+			    (delta_len = escaped_chars_delta_len[*next_escp])) {
+				++delta_len;
+				break;
+			}
+			++next_escp;
+		}
+
+		if (next_escp > inp) {
+			/* copy unescaped chars between inp and next_escp */
+			Py_UNICODE_COPY(outp, inp, next_escp-inp);
+			outp += next_escp - inp;
+		}
+
+		/* escape 'next_escp' */
+		Py_UNICODE_COPY(outp, escaped_chars_repl[*next_escp], delta_len);
+		outp += delta_len;
+
+		inp = next_escp + 1;
+	}
+	if (inp < inp_end)
+		Py_UNICODE_COPY(outp, inp, PyUnicode_GET_SIZE(in) - (inp - PyUnicode_AS_UNICODE(in)));
+
+	return (PyObject*)out;
+}
+#else /* PY_MAJOR_VERSION < 3 */
+
+#define GET_DELTA(inp, inp_end, delta) \
+	while (inp < inp_end) {	 \
+		switch (*inp++) {	   \
+		case '"':			   \
+		case '\'':			  \
+		case '&':			   \
+			delta += 4;		 \
+			break;			  \
+		case '<':			   \
+		case '>':			   \
+			delta += 3;		 \
+			break;			  \
+		}					   \
+	}
+
+#define DO_ESCAPE(inp, inp_end, outp) \
+	{  \
+		Py_ssize_t ncopy = 0;  \
+		while (inp < inp_end) {  \
+			switch (*inp) {  \
+			case '"':  \
+				memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+				outp += ncopy; ncopy = 0; \
+				*outp++ = '&';  \
+				*outp++ = '#';  \
+				*outp++ = '3';  \
+				*outp++ = '4';  \
+				*outp++ = ';';  \
+				break;  \
+			case '\'':  \
+				memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+				outp += ncopy; ncopy = 0; \
+				*outp++ = '&';  \
+				*outp++ = '#';  \
+				*outp++ = '3';  \
+				*outp++ = '9';  \
+				*outp++ = ';';  \
+				break;  \
+			case '&':  \
+				memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+				outp += ncopy; ncopy = 0; \
+				*outp++ = '&';  \
+				*outp++ = 'a';  \
+				*outp++ = 'm';  \
+				*outp++ = 'p';  \
+				*outp++ = ';';  \
+				break;  \
+			case '<':  \
+				memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+				outp += ncopy; ncopy = 0; \
+				*outp++ = '&';  \
+				*outp++ = 'l';  \
+				*outp++ = 't';  \
+				*outp++ = ';';  \
+				break;  \
+			case '>':  \
+				memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+				outp += ncopy; ncopy = 0; \
+				*outp++ = '&';  \
+				*outp++ = 'g';  \
+				*outp++ = 't';  \
+				*outp++ = ';';  \
+				break;  \
+			default:  \
+				ncopy++; \
+			}  \
+            inp++; \
+		}  \
+		memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+	}
+
+static PyObject*
+escape_unicode_kind1(PyUnicodeObject *in)
+{
+	Py_UCS1 *inp = PyUnicode_1BYTE_DATA(in);
+	Py_UCS1 *inp_end = inp + PyUnicode_GET_LENGTH(in);
+	Py_UCS1 *outp;
+	PyObject *out;
+	Py_ssize_t delta = 0;
+
+	GET_DELTA(inp, inp_end, delta);
+	if (!delta) {
+		Py_INCREF(in);
+		return (PyObject*)in;
+	}
+
+	out = PyUnicode_New(PyUnicode_GET_LENGTH(in) + delta,
+						PyUnicode_IS_ASCII(in) ? 127 : 255);
+	if (!out)
+		return NULL;
+
+	inp = PyUnicode_1BYTE_DATA(in);
+	outp = PyUnicode_1BYTE_DATA(out);
+	DO_ESCAPE(inp, inp_end, outp);
+	return out;
+}
+
+static PyObject*
+escape_unicode_kind2(PyUnicodeObject *in)
+{
+	Py_UCS2 *inp = PyUnicode_2BYTE_DATA(in);
+	Py_UCS2 *inp_end = inp + PyUnicode_GET_LENGTH(in);
+	Py_UCS2 *outp;
+	PyObject *out;
+	Py_ssize_t delta = 0;
+
+	GET_DELTA(inp, inp_end, delta);
+	if (!delta) {
+		Py_INCREF(in);
+		return (PyObject*)in;
+	}
+
+	out = PyUnicode_New(PyUnicode_GET_LENGTH(in) + delta, 65535);
+	if (!out)
+		return NULL;
+
+	inp = PyUnicode_2BYTE_DATA(in);
+	outp = PyUnicode_2BYTE_DATA(out);
+	DO_ESCAPE(inp, inp_end, outp);
+	return out;
+}
+
+
+static PyObject*
+escape_unicode_kind4(PyUnicodeObject *in)
+{
+	Py_UCS4 *inp = PyUnicode_4BYTE_DATA(in);
+	Py_UCS4 *inp_end = inp + PyUnicode_GET_LENGTH(in);
+	Py_UCS4 *outp;
+	PyObject *out;
+	Py_ssize_t delta = 0;
+
+	GET_DELTA(inp, inp_end, delta);
+	if (!delta) {
+		Py_INCREF(in);
+		return (PyObject*)in;
+	}
+
+	out = PyUnicode_New(PyUnicode_GET_LENGTH(in) + delta, 1114111);
+	if (!out)
+		return NULL;
+
+	inp = PyUnicode_4BYTE_DATA(in);
+	outp = PyUnicode_4BYTE_DATA(out);
+	DO_ESCAPE(inp, inp_end, outp);
+	return out;
+}
+
+static PyObject*
+escape_unicode(PyUnicodeObject *in)
+{
+	if (PyUnicode_READY(in))
+		return NULL;
+
+	switch (PyUnicode_KIND(in)) {
+	case PyUnicode_1BYTE_KIND:
+		return escape_unicode_kind1(in);
+	case PyUnicode_2BYTE_KIND:
+		return escape_unicode_kind2(in);
+	case PyUnicode_4BYTE_KIND:
+		return escape_unicode_kind4(in);
+	}
+	assert(0);  /* shouldn't happen */
+	return NULL;
+}
+#endif /* PY_MAJOR_VERSION < 3 */
+
+static PyObject*
+escape(PyObject *self, PyObject *text)
+{
+	static PyObject *id_html;
+	PyObject *s = NULL, *rv = NULL, *html;
+
+	if (id_html == NULL) {
+#if PY_MAJOR_VERSION < 3
+		id_html = PyString_InternFromString("__html__");
+#else
+		id_html = PyUnicode_InternFromString("__html__");
+#endif
+		if (id_html == NULL) {
+			return NULL;
+		}
+	}
+
+	/* we don't have to escape integers, bools or floats */
+	if (PyLong_CheckExact(text) ||
+#if PY_MAJOR_VERSION < 3
+	    PyInt_CheckExact(text) ||
+#endif
+	    PyFloat_CheckExact(text) || PyBool_Check(text) ||
+	    text == Py_None)
+		return PyObject_CallFunctionObjArgs(markup, text, NULL);
+
+	/* if the object has an __html__ method that performs the escaping */
+	html = PyObject_GetAttr(text ,id_html);
+	if (html) {
+		s = PyObject_CallObject(html, NULL);
+		Py_DECREF(html);
+		if (s == NULL) {
+			return NULL;
+		}
+		/* Convert to Markup object */
+		rv = PyObject_CallFunctionObjArgs(markup, (PyObject*)s, NULL);
+		Py_DECREF(s);
+		return rv;
+	}
+
+	/* otherwise make the object unicode if it isn't, then escape */
+	PyErr_Clear();
+	if (!PyUnicode_Check(text)) {
+#if PY_MAJOR_VERSION < 3
+		PyObject *unicode = PyObject_Unicode(text);
+#else
+		PyObject *unicode = PyObject_Str(text);
+#endif
+		if (!unicode)
+			return NULL;
+		s = escape_unicode((PyUnicodeObject*)unicode);
+		Py_DECREF(unicode);
+	}
+	else
+		s = escape_unicode((PyUnicodeObject*)text);
+
+	/* convert the unicode string into a markup object. */
+	rv = PyObject_CallFunctionObjArgs(markup, (PyObject*)s, NULL);
+	Py_DECREF(s);
+	return rv;
+}
+
+
+static PyObject*
+escape_silent(PyObject *self, PyObject *text)
+{
+	if (text != Py_None)
+		return escape(self, text);
+	return PyObject_CallFunctionObjArgs(markup, NULL);
+}
+
+
+static PyObject*
+soft_unicode(PyObject *self, PyObject *s)
+{
+	if (!PyUnicode_Check(s))
+#if PY_MAJOR_VERSION < 3
+		return PyObject_Unicode(s);
+#else
+		return PyObject_Str(s);
+#endif
+	Py_INCREF(s);
+	return s;
+}
+
+
+static PyMethodDef module_methods[] = {
+	{"escape", (PyCFunction)escape, METH_O,
+	 "escape(s) -> markup\n\n"
+	 "Convert the characters &, <, >, ', and \" in string s to HTML-safe\n"
+	 "sequences.  Use this if you need to display text that might contain\n"
+	 "such characters in HTML.  Marks return value as markup string."},
+	{"escape_silent", (PyCFunction)escape_silent, METH_O,
+	 "escape_silent(s) -> markup\n\n"
+	 "Like escape but converts None to an empty string."},
+	{"soft_unicode", (PyCFunction)soft_unicode, METH_O,
+	 "soft_unicode(object) -> string\n\n"
+         "Make a string unicode if it isn't already.  That way a markup\n"
+         "string is not converted back to unicode."},
+	{NULL, NULL, 0, NULL}		/* Sentinel */
+};
+
+
+#if PY_MAJOR_VERSION < 3
+
+#ifndef PyMODINIT_FUNC	/* declarations for DLL import/export */
+#define PyMODINIT_FUNC void
+#endif
+PyMODINIT_FUNC
+init_speedups(void)
+{
+	if (!init_constants())
+		return;
+
+	Py_InitModule3("markupsafe._speedups", module_methods, "");
+}
+
+#else /* Python 3.x module initialization */
+
+static struct PyModuleDef module_definition = {
+        PyModuleDef_HEAD_INIT,
+	"markupsafe._speedups",
+	NULL,
+	-1,
+	module_methods,
+	NULL,
+	NULL,
+	NULL,
+	NULL
+};
+
+PyMODINIT_FUNC
+PyInit__speedups(void)
+{
+	if (!init_constants())
+		return NULL;
+
+	return PyModule_Create(&module_definition);
+}
+
+#endif
diff --git a/python3-vckonline/lib/python3.8/site-packages/markupsafe/_speedups.cpython-38-x86_64-linux-gnu.so b/python3-vckonline/lib/python3.8/site-packages/markupsafe/_speedups.cpython-38-x86_64-linux-gnu.so
new file mode 100755
index 0000000..005f5a3
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/markupsafe/_speedups.cpython-38-x86_64-linux-gnu.so differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/METADATA
new file mode 100644
index 0000000..58e2e17
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/METADATA
@@ -0,0 +1,299 @@
+Metadata-Version: 2.1
+Name: msgpack
+Version: 1.0.0
+Summary: MessagePack (de)serializer.
+Home-page: https://msgpack.org/
+Author: Inada Naoki
+Author-email: songofacandy@gmail.com
+License: Apache 2.0
+Project-URL: Documentation, https://msgpack-python.readthedocs.io/
+Project-URL: Source, https://github.com/msgpack/msgpack-python
+Project-URL: Tracker, https://github.com/msgpack/msgpack-python/issues
+Platform: UNKNOWN
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: Apache Software License
+Description-Content-Type: text/markdown
+
+# MessagePack for Python
+
+[![Build Status](https://travis-ci.org/msgpack/msgpack-python.svg?branch=master)](https://travis-ci.org/msgpack/msgpack-python)
+[![Documentation Status](https://readthedocs.org/projects/msgpack-python/badge/?version=latest)](https://msgpack-python.readthedocs.io/en/latest/?badge=latest)
+
+## What's this
+
+[MessagePack](https://msgpack.org/) is an efficient binary serialization format.
+It lets you exchange data among multiple languages like JSON.
+But it's faster and smaller.
+This package provides CPython bindings for reading and writing MessagePack data.
+
+
+## Very important notes for existing users
+
+### PyPI package name
+
+TL;DR: When upgrading from msgpack-0.4 or earlier, don't do `pip install -U msgpack-python`.
+Do `pip uninstall msgpack-python; pip install msgpack` instead.
+
+Package name on PyPI was changed to msgpack from 0.5.
+I upload transitional package (msgpack-python 0.5 which depending on msgpack)
+for smooth transition from msgpack-python to msgpack.
+
+Sadly, this doesn't work for upgrade install.  After `pip install -U msgpack-python`,
+msgpack is removed, and `import msgpack` fail.
+
+
+### Compatibility with the old format
+
+You can use `use_bin_type=False` option to pack `bytes`
+object into raw type in the old msgpack spec, instead of bin type in new msgpack spec.
+
+You can unpack old msgpack format using `raw=True` option.
+It unpacks str (raw) type in msgpack into Python bytes.
+
+See note below for detail.
+
+
+### Major breaking changes in msgpack 1.0
+
+* Python 2
+
+  * The extension module does not support Python 2 anymore.
+    The pure Python implementation (`msgpack.fallback`) is used for Python 2.
+
+* Packer
+
+  * `use_bin_type=True` by default.  bytes are encoded in bin type in msgpack.
+    **If you are still sing Python 2, you must use unicode for all string types.**
+    You can use `use_bin_type=False` to encode into old msgpack format.
+  * `encoding` option is removed.  UTF-8 is used always.
+
+* Unpacker
+
+  * `raw=False` by default.  It assumes str types are valid UTF-8 string
+    and decode them to Python str (unicode) object.
+  * `encoding` option is removed.  You can use `raw=True` to support old format.
+  * Default value of `max_buffer_size` is changed from 0 to 100 MiB.
+  * Default value of `strict_map_key` is changed to True to avoid hashdos.
+    You need to pass `strict_map_key=False` if you have data which contain map keys
+    which type is not bytes or str.
+
+
+## Install
+
+
+   $ pip install msgpack
+
+
+### Pure Python implementation
+
+The extension module in msgpack (`msgpack._cmsgpack`) does not support
+Python 2 and PyPy.
+
+But msgpack provides a pure Python implementation (`msgpack.fallback`)
+for PyPy and Python 2.
+
+Since the [pip](https://pip.pypa.io/) uses the pure Python implementation,
+Python 2 support will not be dropped in the foreseeable future.
+
+
+### Windows
+
+When you can't use a binary distribution, you need to install Visual Studio
+or Windows SDK on Windows.
+Without extension, using pure Python implementation on CPython runs slowly.
+
+
+## How to use
+
+NOTE: In examples below, I use `raw=False` and `use_bin_type=True` for users
+using msgpack < 1.0. These options are default from msgpack 1.0 so you can omit them.
+
+
+### One-shot pack & unpack
+
+Use `packb` for packing and `unpackb` for unpacking.
+msgpack provides `dumps` and `loads` as an alias for compatibility with
+`json` and `pickle`.
+
+`pack` and `dump` packs to a file-like object.
+`unpack` and `load` unpacks from a file-like object.
+
+```pycon
+   >>> import msgpack
+   >>> msgpack.packb([1, 2, 3], use_bin_type=True)
+   '\x93\x01\x02\x03'
+   >>> msgpack.unpackb(_, raw=False)
+   [1, 2, 3]
+```
+
+`unpack` unpacks msgpack's array to Python's list, but can also unpack to tuple:
+
+```pycon
+   >>> msgpack.unpackb(b'\x93\x01\x02\x03', use_list=False, raw=False)
+   (1, 2, 3)
+```
+
+You should always specify the `use_list` keyword argument for backward compatibility.
+See performance issues relating to `use_list option`_ below.
+
+Read the docstring for other options.
+
+
+### Streaming unpacking
+
+`Unpacker` is a "streaming unpacker". It unpacks multiple objects from one
+stream (or from bytes provided through its `feed` method).
+
+```py
+   import msgpack
+   from io import BytesIO
+
+   buf = BytesIO()
+   for i in range(100):
+      buf.write(msgpack.packb(i, use_bin_type=True))
+
+   buf.seek(0)
+
+   unpacker = msgpack.Unpacker(buf, raw=False)
+   for unpacked in unpacker:
+       print(unpacked)
+```
+
+
+### Packing/unpacking of custom data type
+
+It is also possible to pack/unpack custom data types. Here is an example for
+`datetime.datetime`.
+
+```py
+    import datetime
+    import msgpack
+
+    useful_dict = {
+        "id": 1,
+        "created": datetime.datetime.now(),
+    }
+
+    def decode_datetime(obj):
+        if b'__datetime__' in obj:
+            obj = datetime.datetime.strptime(obj["as_str"], "%Y%m%dT%H:%M:%S.%f")
+        return obj
+
+    def encode_datetime(obj):
+        if isinstance(obj, datetime.datetime):
+            return {'__datetime__': True, 'as_str': obj.strftime("%Y%m%dT%H:%M:%S.%f")}
+        return obj
+
+
+    packed_dict = msgpack.packb(useful_dict, default=encode_datetime, use_bin_type=True)
+    this_dict_again = msgpack.unpackb(packed_dict, object_hook=decode_datetime, raw=False)
+```
+
+`Unpacker`'s `object_hook` callback receives a dict; the
+`object_pairs_hook` callback may instead be used to receive a list of
+key-value pairs.
+
+
+### Extended types
+
+It is also possible to pack/unpack custom data types using the **ext** type.
+
+```pycon
+    >>> import msgpack
+    >>> import array
+    >>> def default(obj):
+    ...     if isinstance(obj, array.array) and obj.typecode == 'd':
+    ...         return msgpack.ExtType(42, obj.tostring())
+    ...     raise TypeError("Unknown type: %r" % (obj,))
+    ...
+    >>> def ext_hook(code, data):
+    ...     if code == 42:
+    ...         a = array.array('d')
+    ...         a.fromstring(data)
+    ...         return a
+    ...     return ExtType(code, data)
+    ...
+    >>> data = array.array('d', [1.2, 3.4])
+    >>> packed = msgpack.packb(data, default=default, use_bin_type=True)
+    >>> unpacked = msgpack.unpackb(packed, ext_hook=ext_hook, raw=False)
+    >>> data == unpacked
+    True
+```
+
+
+### Advanced unpacking control
+
+As an alternative to iteration, `Unpacker` objects provide `unpack`,
+`skip`, `read_array_header` and `read_map_header` methods. The former two
+read an entire message from the stream, respectively de-serialising and returning
+the result, or ignoring it. The latter two methods return the number of elements
+in the upcoming container, so that each element in an array, or key-value pair
+in a map, can be unpacked or skipped individually.
+
+
+## Notes
+
+### string and binary type
+
+Early versions of msgpack didn't distinguish string and binary types.
+The type for representing both string and binary types was named **raw**.
+
+You can pack into and unpack from this old spec using `use_bin_type=False`
+and `raw=True` options.
+
+```pycon
+    >>> import msgpack
+    >>> msgpack.unpackb(msgpack.packb([b'spam', u'eggs'], use_bin_type=False), raw=True)
+    [b'spam', b'eggs']
+    >>> msgpack.unpackb(msgpack.packb([b'spam', u'eggs'], use_bin_type=True), raw=False)
+    [b'spam', 'eggs']
+```
+
+### ext type
+
+To use the **ext** type, pass `msgpack.ExtType` object to packer.
+
+```pycon
+    >>> import msgpack
+    >>> packed = msgpack.packb(msgpack.ExtType(42, b'xyzzy'))
+    >>> msgpack.unpackb(packed)
+    ExtType(code=42, data='xyzzy')
+```
+
+You can use it with `default` and `ext_hook`. See below.
+
+
+### Security
+
+To unpacking data received from unreliable source, msgpack provides
+two security options.
+
+`max_buffer_size` (default: `100*1024*1024`) limits the internal buffer size.
+It is used to limit the preallocated list size too.
+
+`strict_map_key` (default: `True`) limits the type of map keys to bytes and str.
+While msgpack spec doesn't limit the types of the map keys,
+there is a risk of the hashdos.
+If you need to support other types for map keys, use `strict_map_key=False`.
+
+
+### Performance tips
+
+CPython's GC starts when growing allocated object.
+This means unpacking may cause useless GC.
+You can use `gc.disable()` when unpacking large message.
+
+List is the default sequence type of Python.
+But tuple is lighter than list.
+You can use `use_list=False` while unpacking when performance is important.
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/RECORD
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--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/RECORD
@@ -0,0 +1,16 @@
+msgpack-1.0.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+msgpack-1.0.0.dist-info/METADATA,sha256=hRAVJbKdktOK2pPWhVokgS8ID5WfluRuc-iqb82ZJAE,9398
+msgpack-1.0.0.dist-info/RECORD,,
+msgpack-1.0.0.dist-info/WHEEL,sha256=VEyGcIFAmk_1KbI6gaZGw_mMiT-pdGweASQLX-DzYaY,108
+msgpack-1.0.0.dist-info/top_level.txt,sha256=2tykSY1pXdiA2xYTDR6jPw0qI5ZGxRihyhf4S5hZyXk,8
+msgpack/__init__.py,sha256=2gJwcsTIaAtCM0GMi2rU-_Y6kILeeQuqRkrQ22jSANc,1118
+msgpack/__pycache__/__init__.cpython-38.pyc,,
+msgpack/__pycache__/_version.cpython-38.pyc,,
+msgpack/__pycache__/exceptions.cpython-38.pyc,,
+msgpack/__pycache__/ext.cpython-38.pyc,,
+msgpack/__pycache__/fallback.cpython-38.pyc,,
+msgpack/_cmsgpack.cpython-38-x86_64-linux-gnu.so,sha256=F1tytR64y8Zz_NPksUI6hHopD97WPPKx5MVKzyk5nck,944792
+msgpack/_version.py,sha256=hu7lzmZ_ClOaOOmRsWb4xomhzQ4UIsLsvv8KY6UysHE,20
+msgpack/exceptions.py,sha256=dCTWei8dpkrMsQDcjQk74ATl9HsIBH0ybt8zOPNqMYc,1081
+msgpack/ext.py,sha256=nV19BzE9Be8SJHrxxYJHFbvEHJaXcP3avRkHVp5wovM,6034
+msgpack/fallback.py,sha256=Z8V3iYUUPqKVy4WWTk64Vq3G0PylQIOmlWvgnMhmkdU,37133
diff --git a/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/WHEEL
new file mode 100644
index 0000000..ae40efd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.31.1)
+Root-Is-Purelib: false
+Tag: cp38-cp38-manylinux1_x86_64
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/top_level.txt
new file mode 100644
index 0000000..3aae276
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/msgpack-1.0.0.dist-info/top_level.txt
@@ -0,0 +1 @@
+msgpack
diff --git a/python3-vckonline/lib/python3.8/site-packages/msgpack/__init__.py b/python3-vckonline/lib/python3.8/site-packages/msgpack/__init__.py
new file mode 100644
index 0000000..d6705e2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/msgpack/__init__.py
@@ -0,0 +1,54 @@
+# coding: utf-8
+from ._version import version
+from .exceptions import *
+from .ext import ExtType, Timestamp
+
+import os
+import sys
+
+
+if os.environ.get("MSGPACK_PUREPYTHON") or sys.version_info[0] == 2:
+    from .fallback import Packer, unpackb, Unpacker
+else:
+    try:
+        from ._cmsgpack import Packer, unpackb, Unpacker
+    except ImportError:
+        from .fallback import Packer, unpackb, Unpacker
+
+
+def pack(o, stream, **kwargs):
+    """
+    Pack object `o` and write it to `stream`
+
+    See :class:`Packer` for options.
+    """
+    packer = Packer(**kwargs)
+    stream.write(packer.pack(o))
+
+
+def packb(o, **kwargs):
+    """
+    Pack object `o` and return packed bytes
+
+    See :class:`Packer` for options.
+    """
+    return Packer(**kwargs).pack(o)
+
+
+def unpack(stream, **kwargs):
+    """
+    Unpack an object from `stream`.
+
+    Raises `ExtraData` when `stream` contains extra bytes.
+    See :class:`Unpacker` for options.
+    """
+    data = stream.read()
+    return unpackb(data, **kwargs)
+
+
+# alias for compatibility to simplejson/marshal/pickle.
+load = unpack
+loads = unpackb
+
+dump = pack
+dumps = packb
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diff --git a/python3-vckonline/lib/python3.8/site-packages/msgpack/_version.py b/python3-vckonline/lib/python3.8/site-packages/msgpack/_version.py
new file mode 100644
index 0000000..9f55cf5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/msgpack/_version.py
@@ -0,0 +1 @@
+version = (1, 0, 0)
diff --git a/python3-vckonline/lib/python3.8/site-packages/msgpack/exceptions.py b/python3-vckonline/lib/python3.8/site-packages/msgpack/exceptions.py
new file mode 100644
index 0000000..d6d2615
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+++ b/python3-vckonline/lib/python3.8/site-packages/msgpack/exceptions.py
@@ -0,0 +1,48 @@
+class UnpackException(Exception):
+    """Base class for some exceptions raised while unpacking.
+
+    NOTE: unpack may raise exception other than subclass of
+    UnpackException.  If you want to catch all error, catch
+    Exception instead.
+    """
+
+
+class BufferFull(UnpackException):
+    pass
+
+
+class OutOfData(UnpackException):
+    pass
+
+
+class FormatError(ValueError, UnpackException):
+    """Invalid msgpack format"""
+
+
+class StackError(ValueError, UnpackException):
+    """Too nested"""
+
+
+# Deprecated.  Use ValueError instead
+UnpackValueError = ValueError
+
+
+class ExtraData(UnpackValueError):
+    """ExtraData is raised when there is trailing data.
+
+    This exception is raised while only one-shot (not streaming)
+    unpack.
+    """
+
+    def __init__(self, unpacked, extra):
+        self.unpacked = unpacked
+        self.extra = extra
+
+    def __str__(self):
+        return "unpack(b) received extra data."
+
+
+# Deprecated.  Use Exception instead to catch all exception during packing.
+PackException = Exception
+PackValueError = ValueError
+PackOverflowError = OverflowError
diff --git a/python3-vckonline/lib/python3.8/site-packages/msgpack/ext.py b/python3-vckonline/lib/python3.8/site-packages/msgpack/ext.py
new file mode 100644
index 0000000..8341c68
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/msgpack/ext.py
@@ -0,0 +1,191 @@
+# coding: utf-8
+from collections import namedtuple
+import datetime
+import sys
+import struct
+
+
+PY2 = sys.version_info[0] == 2
+
+if PY2:
+    int_types = (int, long)
+    _utc = None
+else:
+    int_types = int
+    try:
+        _utc = datetime.timezone.utc
+    except AttributeError:
+        _utc = datetime.timezone(datetime.timedelta(0))
+
+
+class ExtType(namedtuple("ExtType", "code data")):
+    """ExtType represents ext type in msgpack."""
+
+    def __new__(cls, code, data):
+        if not isinstance(code, int):
+            raise TypeError("code must be int")
+        if not isinstance(data, bytes):
+            raise TypeError("data must be bytes")
+        if not 0 <= code <= 127:
+            raise ValueError("code must be 0~127")
+        return super(ExtType, cls).__new__(cls, code, data)
+
+
+class Timestamp(object):
+    """Timestamp represents the Timestamp extension type in msgpack.
+
+    When built with Cython, msgpack uses C methods to pack and unpack `Timestamp`. When using pure-Python
+    msgpack, :func:`to_bytes` and :func:`from_bytes` are used to pack and unpack `Timestamp`.
+
+    This class is immutable: Do not override seconds and nanoseconds.
+    """
+
+    __slots__ = ["seconds", "nanoseconds"]
+
+    def __init__(self, seconds, nanoseconds=0):
+        """Initialize a Timestamp object.
+
+        :param int seconds:
+            Number of seconds since the UNIX epoch (00:00:00 UTC Jan 1 1970, minus leap seconds).
+            May be negative.
+
+        :param int nanoseconds:
+            Number of nanoseconds to add to `seconds` to get fractional time.
+            Maximum is 999_999_999.  Default is 0.
+
+        Note: Negative times (before the UNIX epoch) are represented as negative seconds + positive ns.
+        """
+        if not isinstance(seconds, int_types):
+            raise TypeError("seconds must be an interger")
+        if not isinstance(nanoseconds, int_types):
+            raise TypeError("nanoseconds must be an integer")
+        if not (0 <= nanoseconds < 10 ** 9):
+            raise ValueError(
+                "nanoseconds must be a non-negative integer less than 999999999."
+            )
+        self.seconds = seconds
+        self.nanoseconds = nanoseconds
+
+    def __repr__(self):
+        """String representation of Timestamp."""
+        return "Timestamp(seconds={0}, nanoseconds={1})".format(
+            self.seconds, self.nanoseconds
+        )
+
+    def __eq__(self, other):
+        """Check for equality with another Timestamp object"""
+        if type(other) is self.__class__:
+            return (
+                self.seconds == other.seconds and self.nanoseconds == other.nanoseconds
+            )
+        return False
+
+    def __ne__(self, other):
+        """not-equals method (see :func:`__eq__()`)"""
+        return not self.__eq__(other)
+
+    def __hash__(self):
+        return hash((self.seconds, self.nanoseconds))
+
+    @staticmethod
+    def from_bytes(b):
+        """Unpack bytes into a `Timestamp` object.
+
+        Used for pure-Python msgpack unpacking.
+
+        :param b: Payload from msgpack ext message with code -1
+        :type b: bytes
+
+        :returns: Timestamp object unpacked from msgpack ext payload
+        :rtype: Timestamp
+        """
+        if len(b) == 4:
+            seconds = struct.unpack("!L", b)[0]
+            nanoseconds = 0
+        elif len(b) == 8:
+            data64 = struct.unpack("!Q", b)[0]
+            seconds = data64 & 0x00000003FFFFFFFF
+            nanoseconds = data64 >> 34
+        elif len(b) == 12:
+            nanoseconds, seconds = struct.unpack("!Iq", b)
+        else:
+            raise ValueError(
+                "Timestamp type can only be created from 32, 64, or 96-bit byte objects"
+            )
+        return Timestamp(seconds, nanoseconds)
+
+    def to_bytes(self):
+        """Pack this Timestamp object into bytes.
+
+        Used for pure-Python msgpack packing.
+
+        :returns data: Payload for EXT message with code -1 (timestamp type)
+        :rtype: bytes
+        """
+        if (self.seconds >> 34) == 0:  # seconds is non-negative and fits in 34 bits
+            data64 = self.nanoseconds << 34 | self.seconds
+            if data64 & 0xFFFFFFFF00000000 == 0:
+                # nanoseconds is zero and seconds < 2**32, so timestamp 32
+                data = struct.pack("!L", data64)
+            else:
+                # timestamp 64
+                data = struct.pack("!Q", data64)
+        else:
+            # timestamp 96
+            data = struct.pack("!Iq", self.nanoseconds, self.seconds)
+        return data
+
+    @staticmethod
+    def from_unix(unix_sec):
+        """Create a Timestamp from posix timestamp in seconds.
+
+        :param unix_float: Posix timestamp in seconds.
+        :type unix_float: int or float.
+        """
+        seconds = int(unix_sec // 1)
+        nanoseconds = int((unix_sec % 1) * 10 ** 9)
+        return Timestamp(seconds, nanoseconds)
+
+    def to_unix(self):
+        """Get the timestamp as a floating-point value.
+
+        :returns: posix timestamp
+        :rtype: float
+        """
+        return self.seconds + self.nanoseconds / 1e9
+
+    @staticmethod
+    def from_unix_nano(unix_ns):
+        """Create a Timestamp from posix timestamp in nanoseconds.
+
+        :param int unix_ns: Posix timestamp in nanoseconds.
+        :rtype: Timestamp
+        """
+        return Timestamp(*divmod(unix_ns, 10 ** 9))
+
+    def to_unix_nano(self):
+        """Get the timestamp as a unixtime in nanoseconds.
+
+        :returns: posix timestamp in nanoseconds
+        :rtype: int
+        """
+        return self.seconds * 10 ** 9 + self.nanoseconds
+
+    def to_datetime(self):
+        """Get the timestamp as a UTC datetime.
+
+        Python 2 is not supported.
+
+        :rtype: datetime.
+        """
+        return datetime.datetime.fromtimestamp(self.to_unix(), _utc)
+
+    @staticmethod
+    def from_datetime(dt):
+        """Create a Timestamp from datetime with tzinfo.
+
+        Python 2 is not supported.
+
+        :rtype: Timestamp
+        """
+        return Timestamp.from_unix(dt.timestamp())
diff --git a/python3-vckonline/lib/python3.8/site-packages/msgpack/fallback.py b/python3-vckonline/lib/python3.8/site-packages/msgpack/fallback.py
new file mode 100644
index 0000000..9f6665b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/msgpack/fallback.py
@@ -0,0 +1,1063 @@
+"""Fallback pure Python implementation of msgpack"""
+
+from datetime import datetime as _DateTime
+import sys
+import struct
+
+
+PY2 = sys.version_info[0] == 2
+if PY2:
+    int_types = (int, long)
+
+    def dict_iteritems(d):
+        return d.iteritems()
+
+
+else:
+    int_types = int
+    unicode = str
+    xrange = range
+
+    def dict_iteritems(d):
+        return d.items()
+
+
+if sys.version_info < (3, 5):
+    # Ugly hack...
+    RecursionError = RuntimeError
+
+    def _is_recursionerror(e):
+        return (
+            len(e.args) == 1
+            and isinstance(e.args[0], str)
+            and e.args[0].startswith("maximum recursion depth exceeded")
+        )
+
+
+else:
+
+    def _is_recursionerror(e):
+        return True
+
+
+if hasattr(sys, "pypy_version_info"):
+    # StringIO is slow on PyPy, StringIO is faster.  However: PyPy's own
+    # StringBuilder is fastest.
+    from __pypy__ import newlist_hint
+
+    try:
+        from __pypy__.builders import BytesBuilder as StringBuilder
+    except ImportError:
+        from __pypy__.builders import StringBuilder
+    USING_STRINGBUILDER = True
+
+    class StringIO(object):
+        def __init__(self, s=b""):
+            if s:
+                self.builder = StringBuilder(len(s))
+                self.builder.append(s)
+            else:
+                self.builder = StringBuilder()
+
+        def write(self, s):
+            if isinstance(s, memoryview):
+                s = s.tobytes()
+            elif isinstance(s, bytearray):
+                s = bytes(s)
+            self.builder.append(s)
+
+        def getvalue(self):
+            return self.builder.build()
+
+
+else:
+    USING_STRINGBUILDER = False
+    from io import BytesIO as StringIO
+
+    newlist_hint = lambda size: []
+
+
+from .exceptions import BufferFull, OutOfData, ExtraData, FormatError, StackError
+
+from .ext import ExtType, Timestamp
+
+
+EX_SKIP = 0
+EX_CONSTRUCT = 1
+EX_READ_ARRAY_HEADER = 2
+EX_READ_MAP_HEADER = 3
+
+TYPE_IMMEDIATE = 0
+TYPE_ARRAY = 1
+TYPE_MAP = 2
+TYPE_RAW = 3
+TYPE_BIN = 4
+TYPE_EXT = 5
+
+DEFAULT_RECURSE_LIMIT = 511
+
+
+def _check_type_strict(obj, t, type=type, tuple=tuple):
+    if type(t) is tuple:
+        return type(obj) in t
+    else:
+        return type(obj) is t
+
+
+def _get_data_from_buffer(obj):
+    view = memoryview(obj)
+    if view.itemsize != 1:
+        raise ValueError("cannot unpack from multi-byte object")
+    return view
+
+
+def unpackb(packed, **kwargs):
+    """
+    Unpack an object from `packed`.
+
+    Raises ``ExtraData`` when *packed* contains extra bytes.
+    Raises ``ValueError`` when *packed* is incomplete.
+    Raises ``FormatError`` when *packed* is not valid msgpack.
+    Raises ``StackError`` when *packed* contains too nested.
+    Other exceptions can be raised during unpacking.
+
+    See :class:`Unpacker` for options.
+    """
+    unpacker = Unpacker(None, max_buffer_size=len(packed), **kwargs)
+    unpacker.feed(packed)
+    try:
+        ret = unpacker._unpack()
+    except OutOfData:
+        raise ValueError("Unpack failed: incomplete input")
+    except RecursionError as e:
+        if _is_recursionerror(e):
+            raise StackError
+        raise
+    if unpacker._got_extradata():
+        raise ExtraData(ret, unpacker._get_extradata())
+    return ret
+
+
+if sys.version_info < (2, 7, 6):
+
+    def _unpack_from(f, b, o=0):
+        """Explicit type cast for legacy struct.unpack_from"""
+        return struct.unpack_from(f, bytes(b), o)
+
+
+else:
+    _unpack_from = struct.unpack_from
+
+
+class Unpacker(object):
+    """Streaming unpacker.
+
+    Arguments:
+
+    :param file_like:
+        File-like object having `.read(n)` method.
+        If specified, unpacker reads serialized data from it and :meth:`feed()` is not usable.
+
+    :param int read_size:
+        Used as `file_like.read(read_size)`. (default: `min(16*1024, max_buffer_size)`)
+
+    :param bool use_list:
+        If true, unpack msgpack array to Python list.
+        Otherwise, unpack to Python tuple. (default: True)
+
+    :param bool raw:
+        If true, unpack msgpack raw to Python bytes.
+        Otherwise, unpack to Python str by decoding with UTF-8 encoding (default).
+
+    :param int timestamp:
+        Control how timestamp type is unpacked:
+
+            0 - Timestamp
+            1 - float  (Seconds from the EPOCH)
+            2 - int  (Nanoseconds from the EPOCH)
+            3 - datetime.datetime  (UTC).  Python 2 is not supported.
+
+    :param bool strict_map_key:
+        If true (default), only str or bytes are accepted for map (dict) keys.
+
+    :param callable object_hook:
+        When specified, it should be callable.
+        Unpacker calls it with a dict argument after unpacking msgpack map.
+        (See also simplejson)
+
+    :param callable object_pairs_hook:
+        When specified, it should be callable.
+        Unpacker calls it with a list of key-value pairs after unpacking msgpack map.
+        (See also simplejson)
+
+    :param str unicode_errors:
+        The error handler for decoding unicode. (default: 'strict')
+        This option should be used only when you have msgpack data which
+        contains invalid UTF-8 string.
+
+    :param int max_buffer_size:
+        Limits size of data waiting unpacked.  0 means 2**32-1.
+        The default value is 100*1024*1024 (100MiB).
+        Raises `BufferFull` exception when it is insufficient.
+        You should set this parameter when unpacking data from untrusted source.
+
+    :param int max_str_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max length of str. (default: max_buffer_size)
+
+    :param int max_bin_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max length of bin. (default: max_buffer_size)
+
+    :param int max_array_len:
+        Limits max length of array.
+        (default: max_buffer_size)
+
+    :param int max_map_len:
+        Limits max length of map.
+        (default: max_buffer_size//2)
+
+    :param int max_ext_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max size of ext type.  (default: max_buffer_size)
+
+    Example of streaming deserialize from file-like object::
+
+        unpacker = Unpacker(file_like)
+        for o in unpacker:
+            process(o)
+
+    Example of streaming deserialize from socket::
+
+        unpacker = Unpacker(max_buffer_size)
+        while True:
+            buf = sock.recv(1024**2)
+            if not buf:
+                break
+            unpacker.feed(buf)
+            for o in unpacker:
+                process(o)
+
+    Raises ``ExtraData`` when *packed* contains extra bytes.
+    Raises ``OutOfData`` when *packed* is incomplete.
+    Raises ``FormatError`` when *packed* is not valid msgpack.
+    Raises ``StackError`` when *packed* contains too nested.
+    Other exceptions can be raised during unpacking.
+    """
+
+    def __init__(
+        self,
+        file_like=None,
+        read_size=0,
+        use_list=True,
+        raw=False,
+        timestamp=0,
+        strict_map_key=True,
+        object_hook=None,
+        object_pairs_hook=None,
+        list_hook=None,
+        unicode_errors=None,
+        max_buffer_size=100 * 1024 * 1024,
+        ext_hook=ExtType,
+        max_str_len=-1,
+        max_bin_len=-1,
+        max_array_len=-1,
+        max_map_len=-1,
+        max_ext_len=-1,
+    ):
+        if unicode_errors is None:
+            unicode_errors = "strict"
+
+        if file_like is None:
+            self._feeding = True
+        else:
+            if not callable(file_like.read):
+                raise TypeError("`file_like.read` must be callable")
+            self.file_like = file_like
+            self._feeding = False
+
+        #: array of bytes fed.
+        self._buffer = bytearray()
+        #: Which position we currently reads
+        self._buff_i = 0
+
+        # When Unpacker is used as an iterable, between the calls to next(),
+        # the buffer is not "consumed" completely, for efficiency sake.
+        # Instead, it is done sloppily.  To make sure we raise BufferFull at
+        # the correct moments, we have to keep track of how sloppy we were.
+        # Furthermore, when the buffer is incomplete (that is: in the case
+        # we raise an OutOfData) we need to rollback the buffer to the correct
+        # state, which _buf_checkpoint records.
+        self._buf_checkpoint = 0
+
+        if not max_buffer_size:
+            max_buffer_size = 2 ** 31 - 1
+        if max_str_len == -1:
+            max_str_len = max_buffer_size
+        if max_bin_len == -1:
+            max_bin_len = max_buffer_size
+        if max_array_len == -1:
+            max_array_len = max_buffer_size
+        if max_map_len == -1:
+            max_map_len = max_buffer_size // 2
+        if max_ext_len == -1:
+            max_ext_len = max_buffer_size
+
+        self._max_buffer_size = max_buffer_size
+        if read_size > self._max_buffer_size:
+            raise ValueError("read_size must be smaller than max_buffer_size")
+        self._read_size = read_size or min(self._max_buffer_size, 16 * 1024)
+        self._raw = bool(raw)
+        self._strict_map_key = bool(strict_map_key)
+        self._unicode_errors = unicode_errors
+        self._use_list = use_list
+        if not (0 <= timestamp <= 3):
+            raise ValueError("timestamp must be 0..3")
+        self._timestamp = timestamp
+        self._list_hook = list_hook
+        self._object_hook = object_hook
+        self._object_pairs_hook = object_pairs_hook
+        self._ext_hook = ext_hook
+        self._max_str_len = max_str_len
+        self._max_bin_len = max_bin_len
+        self._max_array_len = max_array_len
+        self._max_map_len = max_map_len
+        self._max_ext_len = max_ext_len
+        self._stream_offset = 0
+
+        if list_hook is not None and not callable(list_hook):
+            raise TypeError("`list_hook` is not callable")
+        if object_hook is not None and not callable(object_hook):
+            raise TypeError("`object_hook` is not callable")
+        if object_pairs_hook is not None and not callable(object_pairs_hook):
+            raise TypeError("`object_pairs_hook` is not callable")
+        if object_hook is not None and object_pairs_hook is not None:
+            raise TypeError(
+                "object_pairs_hook and object_hook are mutually " "exclusive"
+            )
+        if not callable(ext_hook):
+            raise TypeError("`ext_hook` is not callable")
+
+    def feed(self, next_bytes):
+        assert self._feeding
+        view = _get_data_from_buffer(next_bytes)
+        if len(self._buffer) - self._buff_i + len(view) > self._max_buffer_size:
+            raise BufferFull
+
+        # Strip buffer before checkpoint before reading file.
+        if self._buf_checkpoint > 0:
+            del self._buffer[: self._buf_checkpoint]
+            self._buff_i -= self._buf_checkpoint
+            self._buf_checkpoint = 0
+
+        # Use extend here: INPLACE_ADD += doesn't reliably typecast memoryview in jython
+        self._buffer.extend(view)
+
+    def _consume(self):
+        """ Gets rid of the used parts of the buffer. """
+        self._stream_offset += self._buff_i - self._buf_checkpoint
+        self._buf_checkpoint = self._buff_i
+
+    def _got_extradata(self):
+        return self._buff_i < len(self._buffer)
+
+    def _get_extradata(self):
+        return self._buffer[self._buff_i :]
+
+    def read_bytes(self, n):
+        ret = self._read(n)
+        self._consume()
+        return ret
+
+    def _read(self, n):
+        # (int) -> bytearray
+        self._reserve(n)
+        i = self._buff_i
+        self._buff_i = i + n
+        return self._buffer[i : i + n]
+
+    def _reserve(self, n):
+        remain_bytes = len(self._buffer) - self._buff_i - n
+
+        # Fast path: buffer has n bytes already
+        if remain_bytes >= 0:
+            return
+
+        if self._feeding:
+            self._buff_i = self._buf_checkpoint
+            raise OutOfData
+
+        # Strip buffer before checkpoint before reading file.
+        if self._buf_checkpoint > 0:
+            del self._buffer[: self._buf_checkpoint]
+            self._buff_i -= self._buf_checkpoint
+            self._buf_checkpoint = 0
+
+        # Read from file
+        remain_bytes = -remain_bytes
+        while remain_bytes > 0:
+            to_read_bytes = max(self._read_size, remain_bytes)
+            read_data = self.file_like.read(to_read_bytes)
+            if not read_data:
+                break
+            assert isinstance(read_data, bytes)
+            self._buffer += read_data
+            remain_bytes -= len(read_data)
+
+        if len(self._buffer) < n + self._buff_i:
+            self._buff_i = 0  # rollback
+            raise OutOfData
+
+    def _read_header(self, execute=EX_CONSTRUCT):
+        typ = TYPE_IMMEDIATE
+        n = 0
+        obj = None
+        self._reserve(1)
+        b = self._buffer[self._buff_i]
+        self._buff_i += 1
+        if b & 0b10000000 == 0:
+            obj = b
+        elif b & 0b11100000 == 0b11100000:
+            obj = -1 - (b ^ 0xFF)
+        elif b & 0b11100000 == 0b10100000:
+            n = b & 0b00011111
+            typ = TYPE_RAW
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b & 0b11110000 == 0b10010000:
+            n = b & 0b00001111
+            typ = TYPE_ARRAY
+            if n > self._max_array_len:
+                raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
+        elif b & 0b11110000 == 0b10000000:
+            n = b & 0b00001111
+            typ = TYPE_MAP
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
+        elif b == 0xC0:
+            obj = None
+        elif b == 0xC2:
+            obj = False
+        elif b == 0xC3:
+            obj = True
+        elif b == 0xC4:
+            typ = TYPE_BIN
+            self._reserve(1)
+            n = self._buffer[self._buff_i]
+            self._buff_i += 1
+            if n > self._max_bin_len:
+                raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
+            obj = self._read(n)
+        elif b == 0xC5:
+            typ = TYPE_BIN
+            self._reserve(2)
+            n = _unpack_from(">H", self._buffer, self._buff_i)[0]
+            self._buff_i += 2
+            if n > self._max_bin_len:
+                raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
+            obj = self._read(n)
+        elif b == 0xC6:
+            typ = TYPE_BIN
+            self._reserve(4)
+            n = _unpack_from(">I", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+            if n > self._max_bin_len:
+                raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
+            obj = self._read(n)
+        elif b == 0xC7:  # ext 8
+            typ = TYPE_EXT
+            self._reserve(2)
+            L, n = _unpack_from("Bb", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if L > self._max_ext_len:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
+            obj = self._read(L)
+        elif b == 0xC8:  # ext 16
+            typ = TYPE_EXT
+            self._reserve(3)
+            L, n = _unpack_from(">Hb", self._buffer, self._buff_i)
+            self._buff_i += 3
+            if L > self._max_ext_len:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
+            obj = self._read(L)
+        elif b == 0xC9:  # ext 32
+            typ = TYPE_EXT
+            self._reserve(5)
+            L, n = _unpack_from(">Ib", self._buffer, self._buff_i)
+            self._buff_i += 5
+            if L > self._max_ext_len:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
+            obj = self._read(L)
+        elif b == 0xCA:
+            self._reserve(4)
+            obj = _unpack_from(">f", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+        elif b == 0xCB:
+            self._reserve(8)
+            obj = _unpack_from(">d", self._buffer, self._buff_i)[0]
+            self._buff_i += 8
+        elif b == 0xCC:
+            self._reserve(1)
+            obj = self._buffer[self._buff_i]
+            self._buff_i += 1
+        elif b == 0xCD:
+            self._reserve(2)
+            obj = _unpack_from(">H", self._buffer, self._buff_i)[0]
+            self._buff_i += 2
+        elif b == 0xCE:
+            self._reserve(4)
+            obj = _unpack_from(">I", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+        elif b == 0xCF:
+            self._reserve(8)
+            obj = _unpack_from(">Q", self._buffer, self._buff_i)[0]
+            self._buff_i += 8
+        elif b == 0xD0:
+            self._reserve(1)
+            obj = _unpack_from("b", self._buffer, self._buff_i)[0]
+            self._buff_i += 1
+        elif b == 0xD1:
+            self._reserve(2)
+            obj = _unpack_from(">h", self._buffer, self._buff_i)[0]
+            self._buff_i += 2
+        elif b == 0xD2:
+            self._reserve(4)
+            obj = _unpack_from(">i", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+        elif b == 0xD3:
+            self._reserve(8)
+            obj = _unpack_from(">q", self._buffer, self._buff_i)[0]
+            self._buff_i += 8
+        elif b == 0xD4:  # fixext 1
+            typ = TYPE_EXT
+            if self._max_ext_len < 1:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (1, self._max_ext_len))
+            self._reserve(2)
+            n, obj = _unpack_from("b1s", self._buffer, self._buff_i)
+            self._buff_i += 2
+        elif b == 0xD5:  # fixext 2
+            typ = TYPE_EXT
+            if self._max_ext_len < 2:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (2, self._max_ext_len))
+            self._reserve(3)
+            n, obj = _unpack_from("b2s", self._buffer, self._buff_i)
+            self._buff_i += 3
+        elif b == 0xD6:  # fixext 4
+            typ = TYPE_EXT
+            if self._max_ext_len < 4:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (4, self._max_ext_len))
+            self._reserve(5)
+            n, obj = _unpack_from("b4s", self._buffer, self._buff_i)
+            self._buff_i += 5
+        elif b == 0xD7:  # fixext 8
+            typ = TYPE_EXT
+            if self._max_ext_len < 8:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (8, self._max_ext_len))
+            self._reserve(9)
+            n, obj = _unpack_from("b8s", self._buffer, self._buff_i)
+            self._buff_i += 9
+        elif b == 0xD8:  # fixext 16
+            typ = TYPE_EXT
+            if self._max_ext_len < 16:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (16, self._max_ext_len))
+            self._reserve(17)
+            n, obj = _unpack_from("b16s", self._buffer, self._buff_i)
+            self._buff_i += 17
+        elif b == 0xD9:
+            typ = TYPE_RAW
+            self._reserve(1)
+            n = self._buffer[self._buff_i]
+            self._buff_i += 1
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b == 0xDA:
+            typ = TYPE_RAW
+            self._reserve(2)
+            (n,) = _unpack_from(">H", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b == 0xDB:
+            typ = TYPE_RAW
+            self._reserve(4)
+            (n,) = _unpack_from(">I", self._buffer, self._buff_i)
+            self._buff_i += 4
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b == 0xDC:
+            typ = TYPE_ARRAY
+            self._reserve(2)
+            (n,) = _unpack_from(">H", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if n > self._max_array_len:
+                raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
+        elif b == 0xDD:
+            typ = TYPE_ARRAY
+            self._reserve(4)
+            (n,) = _unpack_from(">I", self._buffer, self._buff_i)
+            self._buff_i += 4
+            if n > self._max_array_len:
+                raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
+        elif b == 0xDE:
+            self._reserve(2)
+            (n,) = _unpack_from(">H", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
+            typ = TYPE_MAP
+        elif b == 0xDF:
+            self._reserve(4)
+            (n,) = _unpack_from(">I", self._buffer, self._buff_i)
+            self._buff_i += 4
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
+            typ = TYPE_MAP
+        else:
+            raise FormatError("Unknown header: 0x%x" % b)
+        return typ, n, obj
+
+    def _unpack(self, execute=EX_CONSTRUCT):
+        typ, n, obj = self._read_header(execute)
+
+        if execute == EX_READ_ARRAY_HEADER:
+            if typ != TYPE_ARRAY:
+                raise ValueError("Expected array")
+            return n
+        if execute == EX_READ_MAP_HEADER:
+            if typ != TYPE_MAP:
+                raise ValueError("Expected map")
+            return n
+        # TODO should we eliminate the recursion?
+        if typ == TYPE_ARRAY:
+            if execute == EX_SKIP:
+                for i in xrange(n):
+                    # TODO check whether we need to call `list_hook`
+                    self._unpack(EX_SKIP)
+                return
+            ret = newlist_hint(n)
+            for i in xrange(n):
+                ret.append(self._unpack(EX_CONSTRUCT))
+            if self._list_hook is not None:
+                ret = self._list_hook(ret)
+            # TODO is the interaction between `list_hook` and `use_list` ok?
+            return ret if self._use_list else tuple(ret)
+        if typ == TYPE_MAP:
+            if execute == EX_SKIP:
+                for i in xrange(n):
+                    # TODO check whether we need to call hooks
+                    self._unpack(EX_SKIP)
+                    self._unpack(EX_SKIP)
+                return
+            if self._object_pairs_hook is not None:
+                ret = self._object_pairs_hook(
+                    (self._unpack(EX_CONSTRUCT), self._unpack(EX_CONSTRUCT))
+                    for _ in xrange(n)
+                )
+            else:
+                ret = {}
+                for _ in xrange(n):
+                    key = self._unpack(EX_CONSTRUCT)
+                    if self._strict_map_key and type(key) not in (unicode, bytes):
+                        raise ValueError(
+                            "%s is not allowed for map key" % str(type(key))
+                        )
+                    if not PY2 and type(key) is str:
+                        key = sys.intern(key)
+                    ret[key] = self._unpack(EX_CONSTRUCT)
+                if self._object_hook is not None:
+                    ret = self._object_hook(ret)
+            return ret
+        if execute == EX_SKIP:
+            return
+        if typ == TYPE_RAW:
+            if self._raw:
+                obj = bytes(obj)
+            else:
+                obj = obj.decode("utf_8", self._unicode_errors)
+            return obj
+        if typ == TYPE_BIN:
+            return bytes(obj)
+        if typ == TYPE_EXT:
+            if n == -1:  # timestamp
+                ts = Timestamp.from_bytes(bytes(obj))
+                if self._timestamp == 1:
+                    return ts.to_unix()
+                elif self._timestamp == 2:
+                    return ts.to_unix_nano()
+                elif self._timestamp == 3:
+                    return ts.to_datetime()
+                else:
+                    return ts
+            else:
+                return self._ext_hook(n, bytes(obj))
+        assert typ == TYPE_IMMEDIATE
+        return obj
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        try:
+            ret = self._unpack(EX_CONSTRUCT)
+            self._consume()
+            return ret
+        except OutOfData:
+            self._consume()
+            raise StopIteration
+        except RecursionError:
+            raise StackError
+
+    next = __next__
+
+    def skip(self):
+        self._unpack(EX_SKIP)
+        self._consume()
+
+    def unpack(self):
+        try:
+            ret = self._unpack(EX_CONSTRUCT)
+        except RecursionError:
+            raise StackError
+        self._consume()
+        return ret
+
+    def read_array_header(self):
+        ret = self._unpack(EX_READ_ARRAY_HEADER)
+        self._consume()
+        return ret
+
+    def read_map_header(self):
+        ret = self._unpack(EX_READ_MAP_HEADER)
+        self._consume()
+        return ret
+
+    def tell(self):
+        return self._stream_offset
+
+
+class Packer(object):
+    """
+    MessagePack Packer
+
+    Usage:
+
+        packer = Packer()
+        astream.write(packer.pack(a))
+        astream.write(packer.pack(b))
+
+    Packer's constructor has some keyword arguments:
+
+    :param callable default:
+        Convert user type to builtin type that Packer supports.
+        See also simplejson's document.
+
+    :param bool use_single_float:
+        Use single precision float type for float. (default: False)
+
+    :param bool autoreset:
+        Reset buffer after each pack and return its content as `bytes`. (default: True).
+        If set this to false, use `bytes()` to get content and `.reset()` to clear buffer.
+
+    :param bool use_bin_type:
+        Use bin type introduced in msgpack spec 2.0 for bytes.
+        It also enables str8 type for unicode. (default: True)
+
+    :param bool strict_types:
+        If set to true, types will be checked to be exact. Derived classes
+        from serializable types will not be serialized and will be
+        treated as unsupported type and forwarded to default.
+        Additionally tuples will not be serialized as lists.
+        This is useful when trying to implement accurate serialization
+        for python types.
+
+    :param bool datetime:
+        If set to true, datetime with tzinfo is packed into Timestamp type.
+        Note that the tzinfo is stripped in the timestamp.
+        You can get UTC datetime with `timestamp=3` option of the Unpacker.
+        (Python 2 is not supported).
+
+    :param str unicode_errors:
+        The error handler for encoding unicode. (default: 'strict')
+        DO NOT USE THIS!!  This option is kept for very specific usage.
+    """
+
+    def __init__(
+        self,
+        default=None,
+        use_single_float=False,
+        autoreset=True,
+        use_bin_type=True,
+        strict_types=False,
+        datetime=False,
+        unicode_errors=None,
+    ):
+        self._strict_types = strict_types
+        self._use_float = use_single_float
+        self._autoreset = autoreset
+        self._use_bin_type = use_bin_type
+        self._buffer = StringIO()
+        if PY2 and datetime:
+            raise ValueError("datetime is not supported in Python 2")
+        self._datetime = bool(datetime)
+        self._unicode_errors = unicode_errors or "strict"
+        if default is not None:
+            if not callable(default):
+                raise TypeError("default must be callable")
+        self._default = default
+
+    def _pack(
+        self,
+        obj,
+        nest_limit=DEFAULT_RECURSE_LIMIT,
+        check=isinstance,
+        check_type_strict=_check_type_strict,
+    ):
+        default_used = False
+        if self._strict_types:
+            check = check_type_strict
+            list_types = list
+        else:
+            list_types = (list, tuple)
+        while True:
+            if nest_limit < 0:
+                raise ValueError("recursion limit exceeded")
+            if obj is None:
+                return self._buffer.write(b"\xc0")
+            if check(obj, bool):
+                if obj:
+                    return self._buffer.write(b"\xc3")
+                return self._buffer.write(b"\xc2")
+            if check(obj, int_types):
+                if 0 <= obj < 0x80:
+                    return self._buffer.write(struct.pack("B", obj))
+                if -0x20 <= obj < 0:
+                    return self._buffer.write(struct.pack("b", obj))
+                if 0x80 <= obj <= 0xFF:
+                    return self._buffer.write(struct.pack("BB", 0xCC, obj))
+                if -0x80 <= obj < 0:
+                    return self._buffer.write(struct.pack(">Bb", 0xD0, obj))
+                if 0xFF < obj <= 0xFFFF:
+                    return self._buffer.write(struct.pack(">BH", 0xCD, obj))
+                if -0x8000 <= obj < -0x80:
+                    return self._buffer.write(struct.pack(">Bh", 0xD1, obj))
+                if 0xFFFF < obj <= 0xFFFFFFFF:
+                    return self._buffer.write(struct.pack(">BI", 0xCE, obj))
+                if -0x80000000 <= obj < -0x8000:
+                    return self._buffer.write(struct.pack(">Bi", 0xD2, obj))
+                if 0xFFFFFFFF < obj <= 0xFFFFFFFFFFFFFFFF:
+                    return self._buffer.write(struct.pack(">BQ", 0xCF, obj))
+                if -0x8000000000000000 <= obj < -0x80000000:
+                    return self._buffer.write(struct.pack(">Bq", 0xD3, obj))
+                if not default_used and self._default is not None:
+                    obj = self._default(obj)
+                    default_used = True
+                    continue
+                raise OverflowError("Integer value out of range")
+            if check(obj, (bytes, bytearray)):
+                n = len(obj)
+                if n >= 2 ** 32:
+                    raise ValueError("%s is too large" % type(obj).__name__)
+                self._pack_bin_header(n)
+                return self._buffer.write(obj)
+            if check(obj, unicode):
+                obj = obj.encode("utf-8", self._unicode_errors)
+                n = len(obj)
+                if n >= 2 ** 32:
+                    raise ValueError("String is too large")
+                self._pack_raw_header(n)
+                return self._buffer.write(obj)
+            if check(obj, memoryview):
+                n = len(obj) * obj.itemsize
+                if n >= 2 ** 32:
+                    raise ValueError("Memoryview is too large")
+                self._pack_bin_header(n)
+                return self._buffer.write(obj)
+            if check(obj, float):
+                if self._use_float:
+                    return self._buffer.write(struct.pack(">Bf", 0xCA, obj))
+                return self._buffer.write(struct.pack(">Bd", 0xCB, obj))
+            if check(obj, (ExtType, Timestamp)):
+                if check(obj, Timestamp):
+                    code = -1
+                    data = obj.to_bytes()
+                else:
+                    code = obj.code
+                    data = obj.data
+                assert isinstance(code, int)
+                assert isinstance(data, bytes)
+                L = len(data)
+                if L == 1:
+                    self._buffer.write(b"\xd4")
+                elif L == 2:
+                    self._buffer.write(b"\xd5")
+                elif L == 4:
+                    self._buffer.write(b"\xd6")
+                elif L == 8:
+                    self._buffer.write(b"\xd7")
+                elif L == 16:
+                    self._buffer.write(b"\xd8")
+                elif L <= 0xFF:
+                    self._buffer.write(struct.pack(">BB", 0xC7, L))
+                elif L <= 0xFFFF:
+                    self._buffer.write(struct.pack(">BH", 0xC8, L))
+                else:
+                    self._buffer.write(struct.pack(">BI", 0xC9, L))
+                self._buffer.write(struct.pack("b", code))
+                self._buffer.write(data)
+                return
+            if check(obj, list_types):
+                n = len(obj)
+                self._pack_array_header(n)
+                for i in xrange(n):
+                    self._pack(obj[i], nest_limit - 1)
+                return
+            if check(obj, dict):
+                return self._pack_map_pairs(
+                    len(obj), dict_iteritems(obj), nest_limit - 1
+                )
+
+            if self._datetime and check(obj, _DateTime):
+                obj = Timestamp.from_datetime(obj)
+                default_used = 1
+                continue
+
+            if not default_used and self._default is not None:
+                obj = self._default(obj)
+                default_used = 1
+                continue
+            raise TypeError("Cannot serialize %r" % (obj,))
+
+    def pack(self, obj):
+        try:
+            self._pack(obj)
+        except:
+            self._buffer = StringIO()  # force reset
+            raise
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_map_pairs(self, pairs):
+        self._pack_map_pairs(len(pairs), pairs)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_array_header(self, n):
+        if n >= 2 ** 32:
+            raise ValueError
+        self._pack_array_header(n)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_map_header(self, n):
+        if n >= 2 ** 32:
+            raise ValueError
+        self._pack_map_header(n)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_ext_type(self, typecode, data):
+        if not isinstance(typecode, int):
+            raise TypeError("typecode must have int type.")
+        if not 0 <= typecode <= 127:
+            raise ValueError("typecode should be 0-127")
+        if not isinstance(data, bytes):
+            raise TypeError("data must have bytes type")
+        L = len(data)
+        if L > 0xFFFFFFFF:
+            raise ValueError("Too large data")
+        if L == 1:
+            self._buffer.write(b"\xd4")
+        elif L == 2:
+            self._buffer.write(b"\xd5")
+        elif L == 4:
+            self._buffer.write(b"\xd6")
+        elif L == 8:
+            self._buffer.write(b"\xd7")
+        elif L == 16:
+            self._buffer.write(b"\xd8")
+        elif L <= 0xFF:
+            self._buffer.write(b"\xc7" + struct.pack("B", L))
+        elif L <= 0xFFFF:
+            self._buffer.write(b"\xc8" + struct.pack(">H", L))
+        else:
+            self._buffer.write(b"\xc9" + struct.pack(">I", L))
+        self._buffer.write(struct.pack("B", typecode))
+        self._buffer.write(data)
+
+    def _pack_array_header(self, n):
+        if n <= 0x0F:
+            return self._buffer.write(struct.pack("B", 0x90 + n))
+        if n <= 0xFFFF:
+            return self._buffer.write(struct.pack(">BH", 0xDC, n))
+        if n <= 0xFFFFFFFF:
+            return self._buffer.write(struct.pack(">BI", 0xDD, n))
+        raise ValueError("Array is too large")
+
+    def _pack_map_header(self, n):
+        if n <= 0x0F:
+            return self._buffer.write(struct.pack("B", 0x80 + n))
+        if n <= 0xFFFF:
+            return self._buffer.write(struct.pack(">BH", 0xDE, n))
+        if n <= 0xFFFFFFFF:
+            return self._buffer.write(struct.pack(">BI", 0xDF, n))
+        raise ValueError("Dict is too large")
+
+    def _pack_map_pairs(self, n, pairs, nest_limit=DEFAULT_RECURSE_LIMIT):
+        self._pack_map_header(n)
+        for (k, v) in pairs:
+            self._pack(k, nest_limit - 1)
+            self._pack(v, nest_limit - 1)
+
+    def _pack_raw_header(self, n):
+        if n <= 0x1F:
+            self._buffer.write(struct.pack("B", 0xA0 + n))
+        elif self._use_bin_type and n <= 0xFF:
+            self._buffer.write(struct.pack(">BB", 0xD9, n))
+        elif n <= 0xFFFF:
+            self._buffer.write(struct.pack(">BH", 0xDA, n))
+        elif n <= 0xFFFFFFFF:
+            self._buffer.write(struct.pack(">BI", 0xDB, n))
+        else:
+            raise ValueError("Raw is too large")
+
+    def _pack_bin_header(self, n):
+        if not self._use_bin_type:
+            return self._pack_raw_header(n)
+        elif n <= 0xFF:
+            return self._buffer.write(struct.pack(">BB", 0xC4, n))
+        elif n <= 0xFFFF:
+            return self._buffer.write(struct.pack(">BH", 0xC5, n))
+        elif n <= 0xFFFFFFFF:
+            return self._buffer.write(struct.pack(">BI", 0xC6, n))
+        else:
+            raise ValueError("Bin is too large")
+
+    def bytes(self):
+        """Return internal buffer contents as bytes object"""
+        return self._buffer.getvalue()
+
+    def reset(self):
+        """Reset internal buffer.
+
+        This method is useful only when autoreset=False.
+        """
+        self._buffer = StringIO()
+
+    def getbuffer(self):
+        """Return view of internal buffer."""
+        if USING_STRINGBUILDER or PY2:
+            return memoryview(self.bytes())
+        else:
+            return self._buffer.getbuffer()
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/__init__.py b/python3-vckonline/lib/python3.8/site-packages/mysql/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/mysql/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..45aacc2
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/mysql/__pycache__/__init__.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/__init__.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/__init__.py
new file mode 100644
index 0000000..820fae8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/__init__.py
@@ -0,0 +1,299 @@
+# Copyright (c) 2009, 2020, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""
+MySQL Connector/Python - MySQL driver written in Python
+"""
+
+try:
+    import _mysql_connector  # pylint: disable=F0401
+    from .connection_cext import CMySQLConnection
+except ImportError:
+    HAVE_CEXT = False
+else:
+    HAVE_CEXT = True
+
+try:
+    import dns.resolver
+    import dns.exception
+except ImportError:
+    HAVE_DNSPYTHON = False
+else:
+    HAVE_DNSPYTHON = True
+
+import random
+
+from . import version
+from .connection import MySQLConnection
+from .constants import DEFAULT_CONFIGURATION
+from .errors import (  # pylint: disable=W0622
+    Error, Warning, InterfaceError, DatabaseError,
+    NotSupportedError, DataError, IntegrityError, ProgrammingError,
+    OperationalError, InternalError, custom_error_exception, PoolError)
+from .constants import FieldFlag, FieldType, CharacterSet, \
+    RefreshOption, ClientFlag
+from .dbapi import (
+    Date, Time, Timestamp, Binary, DateFromTicks,
+    TimestampFromTicks, TimeFromTicks,
+    STRING, BINARY, NUMBER, DATETIME, ROWID,
+    apilevel, threadsafety, paramstyle)
+from .optionfiles import read_option_files
+
+_CONNECTION_POOLS = {}
+
+ERROR_NO_CEXT = "MySQL Connector/Python C Extension not available"
+
+
+def _get_pooled_connection(**kwargs):
+    """Return a pooled MySQL connection"""
+    # If no pool name specified, generate one
+    from .pooling import (
+        MySQLConnectionPool, generate_pool_name,
+        CONNECTION_POOL_LOCK)
+
+    try:
+        pool_name = kwargs['pool_name']
+    except KeyError:
+        pool_name = generate_pool_name(**kwargs)
+
+    if 'use_pure' in kwargs:
+        if not kwargs['use_pure'] and not HAVE_CEXT:
+            raise ImportError(ERROR_NO_CEXT)
+
+    # Setup the pool, ensuring only 1 thread can update at a time
+    with CONNECTION_POOL_LOCK:
+        if pool_name not in _CONNECTION_POOLS:
+            _CONNECTION_POOLS[pool_name] = MySQLConnectionPool(**kwargs)
+        elif isinstance(_CONNECTION_POOLS[pool_name], MySQLConnectionPool):
+            # pool_size must be the same
+            check_size = _CONNECTION_POOLS[pool_name].pool_size
+            if ('pool_size' in kwargs
+                    and kwargs['pool_size'] != check_size):
+                raise PoolError("Size can not be changed "
+                                "for active pools.")
+
+    # Return pooled connection
+    try:
+        return _CONNECTION_POOLS[pool_name].get_connection()
+    except AttributeError:
+        raise InterfaceError(
+            "Failed getting connection from pool '{0}'".format(pool_name))
+
+
+def _get_failover_connection(**kwargs):
+    """Return a MySQL connection and try to failover if needed
+
+    An InterfaceError is raise when no MySQL is available. ValueError is
+    raised when the failover server configuration contains an illegal
+    connection argument. Supported arguments are user, password, host, port,
+    unix_socket and database. ValueError is also raised when the failover
+    argument was not provided.
+
+    Returns MySQLConnection instance.
+    """
+    config = kwargs.copy()
+    try:
+        failover = config['failover']
+    except KeyError:
+        raise ValueError('failover argument not provided')
+    del config['failover']
+
+    support_cnx_args = set(
+        ['user', 'password', 'host', 'port', 'unix_socket',
+         'database', 'pool_name', 'pool_size', 'priority'])
+
+    # First check if we can add all use the configuration
+    priority_count = 0
+    for server in failover:
+        diff = set(server.keys()) - support_cnx_args
+        if diff:
+            raise ValueError(
+                "Unsupported connection argument {0} in failover: {1}".format(
+                    's' if len(diff) > 1 else '',
+                    ', '.join(diff)))
+        if hasattr(server, "priority"):
+            priority_count += 1
+
+        server["priority"] = server.get("priority", 100)
+        if server["priority"] < 0 or server["priority"] > 100:
+            raise InterfaceError(
+                "Priority value should be in the range of 0 to 100, "
+                "got : {}".format(server["priority"]))
+        if not isinstance(server["priority"], int):
+            raise InterfaceError(
+                "Priority value should be an integer in the range of 0 to "
+                "100, got : {}".format(server["priority"]))
+
+    if 0 < priority_count < len(failover):
+            raise ProgrammingError("You must either assign no priority to any "
+                                   "of the routers or give a priority for "
+                                   "every router")
+
+    failover.sort(key=lambda x: x['priority'], reverse=True)
+
+    server_directory = {}
+    server_priority_list = []
+    for server in failover:
+        if server["priority"] not in server_directory:
+            server_directory[server["priority"]] = [server]
+            server_priority_list.append(server["priority"])
+        else:
+            server_directory[server["priority"]].append(server)
+
+    for priority in server_priority_list:
+        failover_list = server_directory[priority]
+        for _ in range(len(failover_list)):
+            last = len(failover_list) - 1
+            index = random.randint(0, last)
+            server = failover_list.pop(index)
+            new_config = config.copy()
+            new_config.update(server)
+            new_config.pop('priority', None)
+            try:
+                return connect(**new_config)
+            except Error:
+                # If we failed to connect, we try the next server
+                pass
+
+    raise InterfaceError("Unable to connect to any of the target hosts")
+
+
+def connect(*args, **kwargs):
+    """Create or get a MySQL connection object
+
+    In its simpliest form, Connect() will open a connection to a
+    MySQL server and return a MySQLConnection object.
+
+    When any connection pooling arguments are given, for example pool_name
+    or pool_size, a pool is created or a previously one is used to return
+    a PooledMySQLConnection.
+
+    Returns MySQLConnection or PooledMySQLConnection.
+    """
+    # DNS SRV
+    dns_srv = kwargs.pop('dns_srv') if 'dns_srv' in kwargs else False
+
+    if not isinstance(dns_srv, bool):
+        raise InterfaceError("The value of 'dns-srv' must be a boolean")
+
+    if dns_srv:
+        if not HAVE_DNSPYTHON:
+            raise InterfaceError('MySQL host configuration requested DNS '
+                                 'SRV. This requires the Python dnspython '
+                                 'module. Please refer to documentation')
+        if 'unix_socket' in kwargs:
+            raise InterfaceError('Using Unix domain sockets with DNS SRV '
+                                 'lookup is not allowed')
+        if 'port' in kwargs:
+            raise InterfaceError('Specifying a port number with DNS SRV '
+                                 'lookup is not allowed')
+        if 'failover' in kwargs:
+            raise InterfaceError('Specifying multiple hostnames with DNS '
+                                 'SRV look up is not allowed')
+        if 'host' not in kwargs:
+            kwargs['host'] = DEFAULT_CONFIGURATION['host']
+
+        try:
+            srv_records = dns.resolver.query(kwargs['host'], 'SRV')
+        except dns.exception.DNSException:
+            raise InterfaceError("Unable to locate any hosts for '{0}'"
+                                 "".format(kwargs['host']))
+
+        failover = []
+        for srv in srv_records:
+            failover.append({
+                'host': srv.target.to_text(omit_final_dot=True),
+                'port': srv.port,
+                'priority': srv.priority,
+                'weight': srv.weight
+            })
+
+        failover.sort(key=lambda x: (x['priority'], -x['weight']))
+        kwargs['failover'] = [{'host': srv['host'],
+                               'port': srv['port']} for srv in failover]
+
+    # Option files
+    if 'read_default_file' in kwargs:
+        kwargs['option_files'] = kwargs['read_default_file']
+        kwargs.pop('read_default_file')
+
+    if 'option_files' in kwargs:
+        new_config = read_option_files(**kwargs)
+        return connect(**new_config)
+
+    # Failover
+    if 'failover' in kwargs:
+        return _get_failover_connection(**kwargs)
+
+    # Pooled connections
+    try:
+        from .constants import CNX_POOL_ARGS
+        if any([key in kwargs for key in CNX_POOL_ARGS]):
+            return _get_pooled_connection(**kwargs)
+    except NameError:
+        # No pooling
+        pass
+
+    # Use C Extension by default
+    use_pure = kwargs.get('use_pure', False)
+    if 'use_pure' in kwargs:
+        del kwargs['use_pure']  # Remove 'use_pure' from kwargs
+        if not use_pure and not HAVE_CEXT:
+            raise ImportError(ERROR_NO_CEXT)
+
+    if HAVE_CEXT and not use_pure:
+        return CMySQLConnection(*args, **kwargs)
+    return MySQLConnection(*args, **kwargs)
+Connect = connect  # pylint: disable=C0103
+
+__version_info__ = version.VERSION
+__version__ = version.VERSION_TEXT
+
+__all__ = [
+    'MySQLConnection', 'Connect', 'custom_error_exception',
+
+    # Some useful constants
+    'FieldType', 'FieldFlag', 'ClientFlag', 'CharacterSet', 'RefreshOption',
+    'HAVE_CEXT',
+
+    # Error handling
+    'Error', 'Warning',
+    'InterfaceError', 'DatabaseError',
+    'NotSupportedError', 'DataError', 'IntegrityError', 'ProgrammingError',
+    'OperationalError', 'InternalError',
+
+    # DBAPI PEP 249 required exports
+    'connect', 'apilevel', 'threadsafety', 'paramstyle',
+    'Date', 'Time', 'Timestamp', 'Binary',
+    'DateFromTicks', 'DateFromTicks', 'TimestampFromTicks', 'TimeFromTicks',
+    'STRING', 'BINARY', 'NUMBER',
+    'DATETIME', 'ROWID',
+
+    # C Extension
+    'CMySQLConnection',
+    ]
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@@ -0,0 +1,1437 @@
+# Copyright (c) 2014, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Module gathering all abstract base classes"""
+
+from abc import ABCMeta, abstractmethod, abstractproperty
+import os
+import re
+import time
+import weakref
+TLS_V1_3_SUPPORTED = False
+try:
+    import ssl
+    if hasattr(ssl, "HAS_TLSv1_3") and ssl.HAS_TLSv1_3: 
+        TLS_V1_3_SUPPORTED = True
+except:
+    # If import fails, we don't have SSL support.
+    pass
+
+from .catch23 import make_abc, BYTE_TYPES, STRING_TYPES
+from .conversion import MySQLConverterBase
+from .constants import (ClientFlag, CharacterSet, CONN_ATTRS_DN,
+                        DEFAULT_CONFIGURATION, OPENSSL_CS_NAMES,
+                        TLS_CIPHER_SUITES, TLS_VERSIONS)
+from .optionfiles import MySQLOptionsParser
+from . import errors
+
+NAMED_TUPLE_CACHE = weakref.WeakValueDictionary()
+
+DUPLICATED_IN_LIST_ERROR = (
+    "The '{list}' list must not contain repeated values, the value "
+    "'{value}' is duplicated.")
+
+TLS_VERSION_ERROR = ("The given tls_version: '{}' is not recognized as a valid "
+                     "TLS protocol version (should be one of {}).")
+
+TLS_VER_NO_SUPPORTED = ("No supported TLS protocol version found in the "
+                        "'tls-versions' list '{}'. ")
+
+
+@make_abc(ABCMeta)
+class MySQLConnectionAbstract(object):
+
+    """Abstract class for classes connecting to a MySQL server"""
+
+    def __init__(self, **kwargs):
+        """Initialize"""
+        self._client_flags = ClientFlag.get_default()
+        self._charset_id = 45
+        self._sql_mode = None
+        self._time_zone = None
+        self._autocommit = False
+        self._server_version = None
+        self._handshake = None
+        self._conn_attrs = {}
+
+        self._user = ''
+        self._password = ''
+        self._database = ''
+        self._host = '127.0.0.1'
+        self._port = 3306
+        self._unix_socket = None
+        self._client_host = ''
+        self._client_port = 0
+        self._ssl = {}
+        self._ssl_disabled = DEFAULT_CONFIGURATION["ssl_disabled"]
+        self._force_ipv6 = False
+
+        self._use_unicode = True
+        self._get_warnings = False
+        self._raise_on_warnings = False
+        self._connection_timeout = DEFAULT_CONFIGURATION["connect_timeout"]
+        self._buffered = False
+        self._unread_result = False
+        self._have_next_result = False
+        self._raw = False
+        self._in_transaction = False
+        self._allow_local_infile = DEFAULT_CONFIGURATION["allow_local_infile"]
+        self._allow_local_infile_in_path = (
+            DEFAULT_CONFIGURATION["allow_local_infile_in_path"])
+
+        self._prepared_statements = None
+
+        self._ssl_active = False
+        self._auth_plugin = None
+        self._pool_config_version = None
+        self.converter = None
+        self._converter_class = None
+        self._compress = False
+
+        self._consume_results = False
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.close()
+
+    def _get_self(self):
+        """Return self for weakref.proxy
+
+        This method is used when the original object is needed when using
+        weakref.proxy.
+        """
+        return self
+
+    def _read_option_files(self, config):
+        """
+        Read option files for connection parameters.
+
+        Checks if connection arguments contain option file arguments, and then
+        reads option files accordingly.
+        """
+        if 'option_files' in config:
+            try:
+                if isinstance(config['option_groups'], str):
+                    config['option_groups'] = [config['option_groups']]
+                groups = config['option_groups']
+                del config['option_groups']
+            except KeyError:
+                groups = ['client', 'connector_python']
+
+            if isinstance(config['option_files'], str):
+                config['option_files'] = [config['option_files']]
+            option_parser = MySQLOptionsParser(list(config['option_files']),
+                                               keep_dashes=False)
+            del config['option_files']
+
+            config_from_file = option_parser.get_groups_as_dict_with_priority(
+                *groups)
+            config_options = {}
+            for group in groups:
+                try:
+                    for option, value in config_from_file[group].items():
+                        try:
+                            if option == 'socket':
+                                option = 'unix_socket'
+                            # pylint: disable=W0104
+                            DEFAULT_CONFIGURATION[option]
+                            # pylint: enable=W0104
+
+                            if (option not in config_options or
+                                    config_options[option][1] <= value[1]):
+                                config_options[option] = value
+                        except KeyError:
+                            if group == 'connector_python':
+                                raise AttributeError("Unsupported argument "
+                                                     "'{0}'".format(option))
+                except KeyError:
+                    continue
+
+            for option, value in config_options.items():
+                if option not in config:
+                    try:
+                        config[option] = eval(value[0])  # pylint: disable=W0123
+                    except (NameError, SyntaxError):
+                        config[option] = value[0]
+        return config
+
+    def _validate_tls_ciphersuites(self):
+        """Validates the tls_ciphersuites option.
+        """
+        tls_ciphersuites = []
+        tls_cs = self._ssl["tls_ciphersuites"]
+
+        if isinstance(tls_cs, STRING_TYPES):
+            if not (tls_cs.startswith("[") and
+                    tls_cs.endswith("]")):
+                raise AttributeError("tls_ciphersuites must be a list, "
+                                     "found: '{}'".format(tls_cs))
+            else:
+                tls_css = tls_cs[1:-1].split(",")
+                if not tls_css:
+                    raise AttributeError("No valid cipher suite found "
+                                         "in 'tls_ciphersuites' list.")
+                for _tls_cs in tls_css:
+                    _tls_cs = tls_cs.strip().upper()
+                    if _tls_cs:
+                        tls_ciphersuites.append(_tls_cs)
+
+        elif isinstance(tls_cs, list):
+            tls_ciphersuites = [tls_cs for tls_cs in tls_cs if tls_cs]
+
+        elif isinstance(tls_cs, set):
+            for tls_cs in tls_ciphersuites:
+                if tls_cs:
+                    tls_ciphersuites.append(tls_cs)
+        else:
+            raise AttributeError(
+                "tls_ciphersuites should be a list with one or more "
+                "ciphersuites. Found: '{}'".format(tls_cs))
+
+        tls_versions = TLS_VERSIONS[:] if self._ssl.get("tls_versions", None) \
+           is None else self._ssl["tls_versions"][:]
+
+        # A newer TLS version can use a cipher introduced on
+        # an older version.
+        tls_versions.sort(reverse=True)
+        newer_tls_ver = tls_versions[0]
+        # translated_names[0] belongs to TLSv1, TLSv1.1 and TLSv1.2
+        # translated_names[1] are TLSv1.3 only
+        translated_names = [[],[]]
+        iani_cipher_suites_names = {}
+        ossl_cipher_suites_names = []
+
+        # Old ciphers can work with new TLS versions.
+        # Find all the ciphers introduced on previous TLS versions.
+        for tls_ver in TLS_VERSIONS[:TLS_VERSIONS.index(newer_tls_ver) + 1]:
+            iani_cipher_suites_names.update(TLS_CIPHER_SUITES[tls_ver])
+            ossl_cipher_suites_names.extend(OPENSSL_CS_NAMES[tls_ver])
+
+        for name in tls_ciphersuites:
+            if "-" in name and name in ossl_cipher_suites_names:
+                if name in OPENSSL_CS_NAMES["TLSv1.3"]:
+                    translated_names[1].append(name)
+                else:
+                    translated_names[0].append(name)
+            elif name in iani_cipher_suites_names:
+                translated_name = iani_cipher_suites_names[name]
+                if translated_name in translated_names:
+                    raise AttributeError(
+                        DUPLICATED_IN_LIST_ERROR.format(
+                            list="tls_ciphersuites", value=translated_name))
+                else:
+                    if name in TLS_CIPHER_SUITES["TLSv1.3"]:
+                        translated_names[1].append(
+                            iani_cipher_suites_names[name])
+                    else:
+                        translated_names[0].append(
+                            iani_cipher_suites_names[name])
+            else:
+                raise AttributeError(
+                    "The value '{}' in tls_ciphersuites is not a valid "
+                    "cipher suite".format(name))
+        if not translated_names[0] and not translated_names[1]:
+            raise AttributeError("No valid cipher suite found in the "
+                                 "'tls_ciphersuites' list.")
+        translated_names = [":".join(translated_names[0]),
+                            ":".join(translated_names[1])]
+        self._ssl["tls_ciphersuites"] = translated_names
+
+    def _validate_tls_versions(self):
+        """Validates the tls_versions option.
+        """
+        tls_versions = []
+        tls_version = self._ssl["tls_versions"]
+
+        if isinstance(tls_version, STRING_TYPES):
+            if not (tls_version.startswith("[") and tls_version.endswith("]")):
+                raise AttributeError("tls_versions must be a list, found: '{}'"
+                                     "".format(tls_version))
+            else:
+                tls_vers = tls_version[1:-1].split(",")
+                for tls_ver in tls_vers:
+                    tls_version = tls_ver.strip()
+                    if tls_version == "":
+                        continue
+                    elif tls_version not in TLS_VERSIONS:
+                        raise AttributeError(
+                            TLS_VERSION_ERROR.format(tls_version, TLS_VERSIONS))
+                    elif tls_version in tls_versions:
+                        raise AttributeError(
+                            DUPLICATED_IN_LIST_ERROR.format(
+                                list="tls_versions", value=tls_version))
+                    tls_versions.append(tls_version)
+                if tls_vers == ["TLSv1.3"] and not TLS_V1_3_SUPPORTED:
+                        raise AttributeError(
+                            TLS_VER_NO_SUPPORTED.format(tls_version, TLS_VERSIONS))
+        elif isinstance(tls_version, list):
+            if not tls_version:
+                raise AttributeError(
+                    "At least one TLS protocol version must be specified in "
+                    "'tls_versions' list.")
+            for tls_ver in tls_version:
+                if tls_ver not in TLS_VERSIONS:
+                    raise AttributeError(
+                        TLS_VERSION_ERROR.format(tls_ver, TLS_VERSIONS))
+                elif tls_ver in tls_versions:
+                    raise AttributeError(
+                        DUPLICATED_IN_LIST_ERROR.format(
+                            list="tls_versions", value=tls_ver))
+                else:
+                    tls_versions.append(tls_ver)
+        elif isinstance(tls_version, set):
+            for tls_ver in tls_version:
+                if tls_ver not in TLS_VERSIONS:
+                    raise AttributeError(
+                        TLS_VERSION_ERROR.format(tls_ver, TLS_VERSIONS))
+                tls_versions.append(tls_ver)
+        else:
+            raise AttributeError(
+                "tls_versions should be a list with one or more of versions in "
+                "{}. found: '{}'".format(", ".join(TLS_VERSIONS), tls_versions))
+
+        if not tls_versions:
+            raise AttributeError(
+                "At least one TLS protocol version must be specified "
+                "in 'tls_versions' list when this option is given.")
+        if tls_versions == ["TLSv1.3"] and not TLS_V1_3_SUPPORTED:
+            raise AttributeError(
+                TLS_VER_NO_SUPPORTED.format(tls_version, TLS_VERSIONS))
+        tls_versions.sort()
+        self._ssl["tls_versions"] = tls_versions
+
+    @property
+    def user(self):
+        """User used while connecting to MySQL"""
+        return self._user
+
+    @property
+    def server_host(self):
+        """MySQL server IP address or name"""
+        return self._host
+
+    @property
+    def server_port(self):
+        "MySQL server TCP/IP port"
+        return self._port
+
+    @property
+    def unix_socket(self):
+        "MySQL Unix socket file location"
+        return self._unix_socket
+
+    @abstractproperty
+    def database(self):
+        """Get the current database"""
+        pass
+
+    @database.setter
+    def database(self, value):
+        """Set the current database"""
+        self.cmd_query("USE %s" % value)
+
+    @property
+    def can_consume_results(self):
+        """Returns whether to consume results"""
+        return self._consume_results
+
+    def config(self, **kwargs):
+        """Configure the MySQL Connection
+
+        This method allows you to configure the MySQLConnection instance.
+
+        Raises on errors.
+        """
+        config = kwargs.copy()
+        if 'dsn' in config:
+            raise errors.NotSupportedError("Data source name is not supported")
+
+        # Read option files
+        self._read_option_files(config)
+
+        # Configure how we handle MySQL warnings
+        try:
+            self.get_warnings = config['get_warnings']
+            del config['get_warnings']
+        except KeyError:
+            pass  # Leave what was set or default
+        try:
+            self.raise_on_warnings = config['raise_on_warnings']
+            del config['raise_on_warnings']
+        except KeyError:
+            pass  # Leave what was set or default
+
+        # Configure client flags
+        try:
+            default = ClientFlag.get_default()
+            self.set_client_flags(config['client_flags'] or default)
+            del config['client_flags']
+        except KeyError:
+            pass  # Missing client_flags-argument is OK
+
+        try:
+            if config['compress']:
+                self._compress = True
+                self.set_client_flags([ClientFlag.COMPRESS])
+        except KeyError:
+            pass  # Missing compress argument is OK
+
+        self._allow_local_infile = config.get(
+            'allow_local_infile', DEFAULT_CONFIGURATION['allow_local_infile'])
+        self._allow_local_infile_in_path = config.get(
+            'allow_local_infile_in_path',
+            DEFAULT_CONFIGURATION['allow_local_infile_in_path'])
+        infile_in_path = None
+        if self._allow_local_infile_in_path:
+            infile_in_path = os.path.abspath(self._allow_local_infile_in_path)
+            if infile_in_path and os.path.exists(infile_in_path) and \
+               not os.path.isdir(infile_in_path) or \
+               os.path.islink(infile_in_path):
+                raise AttributeError("allow_local_infile_in_path must be a "
+                                     "directory")
+        if self._allow_local_infile or self._allow_local_infile_in_path:
+            self.set_client_flags([ClientFlag.LOCAL_FILES])
+        else:
+            self.set_client_flags([-ClientFlag.LOCAL_FILES])
+
+        try:
+            if not config['consume_results']:
+                self._consume_results = False
+            else:
+                self._consume_results = True
+        except KeyError:
+            self._consume_results = False
+
+        # Configure auth_plugin
+        try:
+            self._auth_plugin = config['auth_plugin']
+            del config['auth_plugin']
+        except KeyError:
+            self._auth_plugin = ''
+
+        # Configure character set and collation
+        if 'charset' in config or 'collation' in config:
+            try:
+                charset = config['charset']
+                del config['charset']
+            except KeyError:
+                charset = None
+            try:
+                collation = config['collation']
+                del config['collation']
+            except KeyError:
+                collation = None
+            self._charset_id = CharacterSet.get_charset_info(charset,
+                                                             collation)[0]
+
+        # Set converter class
+        try:
+            self.set_converter_class(config['converter_class'])
+        except KeyError:
+            pass  # Using default converter class
+        except TypeError:
+            raise AttributeError("Converter class should be a subclass "
+                                 "of conversion.MySQLConverterBase.")
+
+        # Compatible configuration with other drivers
+        compat_map = [
+            # (<other driver argument>,<translates to>)
+            ('db', 'database'),
+            ('username', 'user'),
+            ('passwd', 'password'),
+            ('connect_timeout', 'connection_timeout'),
+            ('read_default_file', 'option_files'),
+        ]
+        for compat, translate in compat_map:
+            try:
+                if translate not in config:
+                    config[translate] = config[compat]
+                del config[compat]
+            except KeyError:
+                pass  # Missing compat argument is OK
+
+        # Configure login information
+        if 'user' in config or 'password' in config:
+            try:
+                user = config['user']
+                del config['user']
+            except KeyError:
+                user = self._user
+            try:
+                password = config['password']
+                del config['password']
+            except KeyError:
+                password = self._password
+            self.set_login(user, password)
+
+        # Configure host information
+        if 'host' in config and config['host']:
+            self._host = config['host']
+
+        # Check network locations
+        try:
+            self._port = int(config['port'])
+            del config['port']
+        except KeyError:
+            pass  # Missing port argument is OK
+        except ValueError:
+            raise errors.InterfaceError(
+                "TCP/IP port number should be an integer")
+
+        if "ssl_disabled" in config:
+            self._ssl_disabled = config.pop("ssl_disabled")
+
+        if self._ssl_disabled and self._auth_plugin == "mysql_clear_password":
+            raise errors.InterfaceError("Clear password authentication is not "
+                                        "supported over insecure channels")
+
+        # Other configuration
+        set_ssl_flag = False
+        for key, value in config.items():
+            try:
+                DEFAULT_CONFIGURATION[key]
+            except KeyError:
+                raise AttributeError("Unsupported argument '{0}'".format(key))
+            # SSL Configuration
+            if key.startswith('ssl_'):
+                set_ssl_flag = True
+                self._ssl.update({key.replace('ssl_', ''): value})
+            elif key.startswith('tls_'):
+                set_ssl_flag = True
+                self._ssl.update({key: value})
+            else:
+                attribute = '_' + key
+                try:
+                    setattr(self, attribute, value.strip())
+                except AttributeError:
+                    setattr(self, attribute, value)
+
+        if set_ssl_flag:
+            if 'verify_cert' not in self._ssl:
+                self._ssl['verify_cert'] = \
+                    DEFAULT_CONFIGURATION['ssl_verify_cert']
+            if 'verify_identity' not in self._ssl:
+                self._ssl['verify_identity'] = \
+                    DEFAULT_CONFIGURATION['ssl_verify_identity']
+            # Make sure both ssl_key/ssl_cert are set, or neither (XOR)
+            if 'ca' not in self._ssl or self._ssl['ca'] is None:
+                self._ssl['ca'] = ""
+            if bool('key' in self._ssl) != bool('cert' in self._ssl):
+                raise AttributeError(
+                    "ssl_key and ssl_cert need to be both "
+                    "specified, or neither."
+                )
+            # Make sure key/cert are set to None
+            elif not set(('key', 'cert')) <= set(self._ssl):
+                self._ssl['key'] = None
+                self._ssl['cert'] = None
+            elif (self._ssl['key'] is None) != (self._ssl['cert'] is None):
+                raise AttributeError(
+                    "ssl_key and ssl_cert need to be both "
+                    "set, or neither."
+                )
+            if "tls_versions" in self._ssl and \
+               self._ssl["tls_versions"] is not None:
+                if self._ssl_disabled:
+                    raise AttributeError("The tls_versions option can not be "
+                                         "used along with ssl_disabled.")
+                self._validate_tls_versions()
+
+            if "tls_ciphersuites" in self._ssl and self._ssl["tls_ciphersuites"] is not None:
+                if self._ssl_disabled:
+                    raise AttributeError("The tls_ciphersuites option can not "
+                                         "be used along with ssl_disabled.")
+                self._validate_tls_ciphersuites()
+
+        if self._conn_attrs is None:
+            self._conn_attrs = {}
+        elif not isinstance(self._conn_attrs, dict):
+            raise errors.InterfaceError('conn_attrs must be of type dict.')
+        else:
+            for attr_name in self._conn_attrs:
+                if attr_name in CONN_ATTRS_DN:
+                    continue
+                # Validate name type
+                if not isinstance(attr_name, STRING_TYPES):
+                    raise errors.InterfaceError(
+                        "Attribute name should be a string, found: '{}' in '{}'"
+                        "".format(attr_name, self._conn_attrs))
+                # Validate attribute name limit 32 characters
+                if len(attr_name) > 32:
+                    raise errors.InterfaceError(
+                        "Attribute name '{}' exceeds 32 characters limit size."
+                        "".format(attr_name))
+                # Validate names in connection attributes cannot start with "_"
+                if attr_name.startswith("_"):
+                    raise errors.InterfaceError(
+                        "Key names in connection attributes cannot start with "
+                        "'_', found: '{}'".format(attr_name))
+                # Validate value type
+                attr_value = self._conn_attrs[attr_name]
+                if not isinstance(attr_value, STRING_TYPES):
+                    raise errors.InterfaceError(
+                        "Attribute '{}' value: '{}' must be a string type."
+                        "".format(attr_name, attr_value))
+                # Validate attribute value limit 1024 characters
+                if len(attr_value) > 1024:
+                    raise errors.InterfaceError(
+                        "Attribute '{}' value: '{}' exceeds 1024 characters "
+                        "limit size".format(attr_name, attr_value))
+
+        if self._client_flags & ClientFlag.CONNECT_ARGS:
+            self._add_default_conn_attrs()
+
+    def _add_default_conn_attrs(self):
+        """Add the default connection attributes."""
+        pass
+
+    def _check_server_version(self, server_version):
+        """Check the MySQL version
+
+        This method will check the MySQL version and raise an InterfaceError
+        when it is not supported or invalid. It will return the version
+        as a tuple with major, minor and patch.
+
+        Raises InterfaceError if invalid server version.
+
+        Returns tuple
+        """
+        if isinstance(server_version, BYTE_TYPES):
+            server_version = server_version.decode()
+
+        # pylint: disable=W1401
+        regex_ver = re.compile(r"^(\d{1,2})\.(\d{1,2})\.(\d{1,3})(.*)")
+        # pylint: enable=W1401
+        match = regex_ver.match(server_version)
+        if not match:
+            raise errors.InterfaceError("Failed parsing MySQL version")
+
+        version = tuple([int(v) for v in match.groups()[0:3]])
+        if version < (4, 1):
+            raise errors.InterfaceError(
+                "MySQL Version '{0}' is not supported.".format(server_version))
+
+        return version
+
+    def get_server_version(self):
+        """Get the MySQL version
+
+        This method returns the MySQL server version as a tuple. If not
+        previously connected, it will return None.
+
+        Returns a tuple or None.
+        """
+        return self._server_version
+
+    def get_server_info(self):
+        """Get the original MySQL version information
+
+        This method returns the original MySQL server as text. If not
+        previously connected, it will return None.
+
+        Returns a string or None.
+        """
+        try:
+            return self._handshake['server_version_original']
+        except (TypeError, KeyError):
+            return None
+
+    @abstractproperty
+    def in_transaction(self):
+        """MySQL session has started a transaction"""
+        pass
+
+    def set_client_flags(self, flags):
+        """Set the client flags
+
+        The flags-argument can be either an int or a list (or tuple) of
+        ClientFlag-values. If it is an integer, it will set client_flags
+        to flags as is.
+        If flags is a list (or tuple), each flag will be set or unset
+        when it's negative.
+
+        set_client_flags([ClientFlag.FOUND_ROWS,-ClientFlag.LONG_FLAG])
+
+        Raises ProgrammingError when the flags argument is not a set or
+        an integer bigger than 0.
+
+        Returns self.client_flags
+        """
+        if isinstance(flags, int) and flags > 0:
+            self._client_flags = flags
+        elif isinstance(flags, (tuple, list)):
+            for flag in flags:
+                if flag < 0:
+                    self._client_flags &= ~abs(flag)
+                else:
+                    self._client_flags |= flag
+        else:
+            raise errors.ProgrammingError(
+                "set_client_flags expect integer (>0) or set")
+        return self._client_flags
+
+    def isset_client_flag(self, flag):
+        """Check if a client flag is set"""
+        if (self._client_flags & flag) > 0:
+            return True
+        return False
+
+    @property
+    def time_zone(self):
+        """Get the current time zone"""
+        return self.info_query("SELECT @@session.time_zone")[0]
+
+    @time_zone.setter
+    def time_zone(self, value):
+        """Set the time zone"""
+        self.cmd_query("SET @@session.time_zone = '{0}'".format(value))
+        self._time_zone = value
+
+    @property
+    def sql_mode(self):
+        """Get the SQL mode"""
+        return self.info_query("SELECT @@session.sql_mode")[0]
+
+    @sql_mode.setter
+    def sql_mode(self, value):
+        """Set the SQL mode
+
+        This method sets the SQL Mode for the current connection. The value
+        argument can be either a string with comma separate mode names, or
+        a sequence of mode names.
+
+        It is good practice to use the constants class SQLMode:
+          from mysql.connector.constants import SQLMode
+          cnx.sql_mode = [SQLMode.NO_ZERO_DATE, SQLMode.REAL_AS_FLOAT]
+        """
+        if isinstance(value, (list, tuple)):
+            value = ','.join(value)
+        self.cmd_query("SET @@session.sql_mode = '{0}'".format(value))
+        self._sql_mode = value
+
+    @abstractmethod
+    def info_query(self, query):
+        """Send a query which only returns 1 row"""
+        pass
+
+    def set_login(self, username=None, password=None):
+        """Set login information for MySQL
+
+        Set the username and/or password for the user connecting to
+        the MySQL Server.
+        """
+        if username is not None:
+            self._user = username.strip()
+        else:
+            self._user = ''
+        if password is not None:
+            self._password = password
+        else:
+            self._password = ''
+
+    def set_unicode(self, value=True):
+        """Toggle unicode mode
+
+        Set whether we return string fields as unicode or not.
+        Default is True.
+        """
+        self._use_unicode = value
+        if self.converter:
+            self.converter.set_unicode(value)
+
+    @property
+    def autocommit(self):
+        """Get whether autocommit is on or off"""
+        value = self.info_query("SELECT @@session.autocommit")[0]
+        return True if value == 1 else False
+
+    @autocommit.setter
+    def autocommit(self, value):
+        """Toggle autocommit"""
+        switch = 'ON' if value else 'OFF'
+        self.cmd_query("SET @@session.autocommit = {0}".format(switch))
+        self._autocommit = value
+
+    @property
+    def get_warnings(self):
+        """Get whether this connection retrieves warnings automatically
+
+        This method returns whether this connection retrieves warnings
+        automatically.
+
+        Returns True, or False when warnings are not retrieved.
+        """
+        return self._get_warnings
+
+    @get_warnings.setter
+    def get_warnings(self, value):
+        """Set whether warnings should be automatically retrieved
+
+        The toggle-argument must be a boolean. When True, cursors for this
+        connection will retrieve information about warnings (if any).
+
+        Raises ValueError on error.
+        """
+        if not isinstance(value, bool):
+            raise ValueError("Expected a boolean type")
+        self._get_warnings = value
+
+    @property
+    def raise_on_warnings(self):
+        """Get whether this connection raises an error on warnings
+
+        This method returns whether this connection will raise errors when
+        MySQL reports warnings.
+
+        Returns True or False.
+        """
+        return self._raise_on_warnings
+
+    @raise_on_warnings.setter
+    def raise_on_warnings(self, value):
+        """Set whether warnings raise an error
+
+        The toggle-argument must be a boolean. When True, cursors for this
+        connection will raise an error when MySQL reports warnings.
+
+        Raising on warnings implies retrieving warnings automatically. In
+        other words: warnings will be set to True. If set to False, warnings
+        will be also set to False.
+
+        Raises ValueError on error.
+        """
+        if not isinstance(value, bool):
+            raise ValueError("Expected a boolean type")
+        self._raise_on_warnings = value
+        self._get_warnings = value
+
+
+    @property
+    def unread_result(self):
+        """Get whether there is an unread result
+
+        This method is used by cursors to check whether another cursor still
+        needs to retrieve its result set.
+
+        Returns True, or False when there is no unread result.
+        """
+        return self._unread_result
+
+    @unread_result.setter
+    def unread_result(self, value):
+        """Set whether there is an unread result
+
+        This method is used by cursors to let other cursors know there is
+        still a result set that needs to be retrieved.
+
+        Raises ValueError on errors.
+        """
+        if not isinstance(value, bool):
+            raise ValueError("Expected a boolean type")
+        self._unread_result = value
+
+    @property
+    def charset(self):
+        """Returns the character set for current connection
+
+        This property returns the character set name of the current connection.
+        The server is queried when the connection is active. If not connected,
+        the configured character set name is returned.
+
+        Returns a string.
+        """
+        return CharacterSet.get_info(self._charset_id)[0]
+
+    @property
+    def python_charset(self):
+        """Returns the Python character set for current connection
+
+        This property returns the character set name of the current connection.
+        Note that, unlike property charset, this checks if the previously set
+        character set is supported by Python and if not, it returns the
+        equivalent character set that Python supports.
+
+        Returns a string.
+        """
+        encoding = CharacterSet.get_info(self._charset_id)[0]
+        if encoding in ('utf8mb4', 'binary'):
+            return 'utf8'
+        return encoding
+
+    def set_charset_collation(self, charset=None, collation=None):
+        """Sets the character set and collation for the current connection
+
+        This method sets the character set and collation to be used for
+        the current connection. The charset argument can be either the
+        name of a character set as a string, or the numerical equivalent
+        as defined in constants.CharacterSet.
+
+        When the collation is not given, the default will be looked up and
+        used.
+
+        For example, the following will set the collation for the latin1
+        character set to latin1_general_ci:
+
+           set_charset('latin1','latin1_general_ci')
+
+        """
+        if charset:
+            if isinstance(charset, int):
+                (self._charset_id, charset_name, collation_name) = \
+                    CharacterSet.get_charset_info(charset)
+            elif isinstance(charset, str):
+                (self._charset_id, charset_name, collation_name) = \
+                    CharacterSet.get_charset_info(charset, collation)
+            else:
+                raise ValueError(
+                    "charset should be either integer, string or None")
+        elif collation:
+            (self._charset_id, charset_name, collation_name) = \
+                    CharacterSet.get_charset_info(collation=collation)
+
+        self._execute_query("SET NAMES '{0}' COLLATE '{1}'".format(
+            charset_name, collation_name))
+
+        try:
+            # Required for C Extension
+            self.set_character_set_name(charset_name)  # pylint: disable=E1101
+        except AttributeError:
+            # Not required for pure Python connection
+            pass
+
+        if self.converter:
+            self.converter.set_charset(charset_name)
+
+    @property
+    def collation(self):
+        """Returns the collation for current connection
+
+        This property returns the collation name of the current connection.
+        The server is queried when the connection is active. If not connected,
+        the configured collation name is returned.
+
+        Returns a string.
+        """
+        return CharacterSet.get_charset_info(self._charset_id)[2]
+
+    @abstractmethod
+    def _do_handshake(self):
+        """Gather information of the MySQL server before authentication"""
+        pass
+
+    @abstractmethod
+    def _open_connection(self):
+        """Open the connection to the MySQL server"""
+        pass
+
+    def _post_connection(self):
+        """Executes commands after connection has been established
+
+        This method executes commands after the connection has been
+        established. Some setting like autocommit, character set, and SQL mode
+        are set using this method.
+        """
+        self.set_charset_collation(self._charset_id)
+        self.autocommit = self._autocommit
+        if self._time_zone:
+            self.time_zone = self._time_zone
+        if self._sql_mode:
+            self.sql_mode = self._sql_mode
+
+    @abstractmethod
+    def disconnect(self):
+        """Disconnect from the MySQL server"""
+        pass
+    close = disconnect
+
+    def connect(self, **kwargs):
+        """Connect to the MySQL server
+
+        This method sets up the connection to the MySQL server. If no
+        arguments are given, it will use the already configured or default
+        values.
+        """
+        if kwargs:
+            self.config(**kwargs)
+
+        self.disconnect()
+        self._open_connection()
+        # Server does not allow to run any other statement different from ALTER
+        # when user's password has been expired.
+        if not self._client_flags & ClientFlag.CAN_HANDLE_EXPIRED_PASSWORDS:
+            self._post_connection()
+
+    def reconnect(self, attempts=1, delay=0):
+        """Attempt to reconnect to the MySQL server
+
+        The argument attempts should be the number of times a reconnect
+        is tried. The delay argument is the number of seconds to wait between
+        each retry.
+
+        You may want to set the number of attempts higher and use delay when
+        you expect the MySQL server to be down for maintenance or when you
+        expect the network to be temporary unavailable.
+
+        Raises InterfaceError on errors.
+        """
+        counter = 0
+        while counter != attempts:
+            counter = counter + 1
+            try:
+                self.disconnect()
+                self.connect()
+                if self.is_connected():
+                    break
+            except Exception as err:  # pylint: disable=W0703
+                if counter == attempts:
+                    msg = "Can not reconnect to MySQL after {0} "\
+                          "attempt(s): {1}".format(attempts, str(err))
+                    raise errors.InterfaceError(msg)
+            if delay > 0:
+                time.sleep(delay)
+
+    @abstractmethod
+    def is_connected(self):
+        """Reports whether the connection to MySQL Server is available"""
+        pass
+
+    @abstractmethod
+    def ping(self, reconnect=False, attempts=1, delay=0):
+        """Check availability of the MySQL server"""
+        pass
+
+    @abstractmethod
+    def commit(self):
+        """Commit current transaction"""
+        pass
+
+    @abstractmethod
+    def cursor(self, buffered=None, raw=None, prepared=None, cursor_class=None,
+               dictionary=None, named_tuple=None):
+        """Instantiates and returns a cursor"""
+        pass
+
+    @abstractmethod
+    def _execute_query(self, query):
+        """Execute a query"""
+        pass
+
+    @abstractmethod
+    def rollback(self):
+        """Rollback current transaction"""
+        pass
+
+    def start_transaction(self, consistent_snapshot=False,
+                          isolation_level=None, readonly=None):
+        """Start a transaction
+
+        This method explicitly starts a transaction sending the
+        START TRANSACTION statement to the MySQL server. You can optionally
+        set whether there should be a consistent snapshot, which
+        isolation level you need or which access mode i.e. READ ONLY or
+        READ WRITE.
+
+        For example, to start a transaction with isolation level SERIALIZABLE,
+        you would do the following:
+            >>> cnx = mysql.connector.connect(..)
+            >>> cnx.start_transaction(isolation_level='SERIALIZABLE')
+
+        Raises ProgrammingError when a transaction is already in progress
+        and when ValueError when isolation_level specifies an Unknown
+        level.
+        """
+        if self.in_transaction:
+            raise errors.ProgrammingError("Transaction already in progress")
+
+        if isolation_level:
+            level = isolation_level.strip().replace('-', ' ').upper()
+            levels = ['READ UNCOMMITTED', 'READ COMMITTED', 'REPEATABLE READ',
+                      'SERIALIZABLE']
+
+            if level not in levels:
+                raise ValueError(
+                    'Unknown isolation level "{0}"'.format(isolation_level))
+
+            self._execute_query(
+                "SET TRANSACTION ISOLATION LEVEL {0}".format(level))
+
+        if readonly is not None:
+            if self._server_version < (5, 6, 5):
+                raise ValueError(
+                    "MySQL server version {0} does not support "
+                    "this feature".format(self._server_version))
+
+            if readonly:
+                access_mode = 'READ ONLY'
+            else:
+                access_mode = 'READ WRITE'
+            self._execute_query(
+                "SET TRANSACTION {0}".format(access_mode))
+
+        query = "START TRANSACTION"
+        if consistent_snapshot:
+            query += " WITH CONSISTENT SNAPSHOT"
+        self.cmd_query(query)
+
+    def reset_session(self, user_variables=None, session_variables=None):
+        """Clears the current active session
+
+        This method resets the session state, if the MySQL server is 5.7.3
+        or later active session will be reset without re-authenticating.
+        For other server versions session will be reset by re-authenticating.
+
+        It is possible to provide a sequence of variables and their values to
+        be set after clearing the session. This is possible for both user
+        defined variables and session variables.
+        This method takes two arguments user_variables and session_variables
+        which are dictionaries.
+
+        Raises OperationalError if not connected, InternalError if there are
+        unread results and InterfaceError on errors.
+        """
+        if not self.is_connected():
+            raise errors.OperationalError("MySQL Connection not available.")
+
+        try:
+            self.cmd_reset_connection()
+        except (errors.NotSupportedError, NotImplementedError):
+            if self._compress:
+                raise errors.NotSupportedError(
+                    "Reset session is not supported with compression for "
+                    "MySQL server version 5.7.2 or earlier.")
+            else:
+                self.cmd_change_user(self._user, self._password,
+                                     self._database, self._charset_id)
+
+        if user_variables or session_variables:
+            cur = self.cursor()
+            if user_variables:
+                for key, value in user_variables.items():
+                    cur.execute("SET @`{0}` = %s".format(key), (value,))
+            if session_variables:
+                for key, value in session_variables.items():
+                    cur.execute("SET SESSION `{0}` = %s".format(key), (value,))
+            cur.close()
+
+    def set_converter_class(self, convclass):
+        """
+        Set the converter class to be used. This should be a class overloading
+        methods and members of conversion.MySQLConverter.
+        """
+        if convclass and issubclass(convclass, MySQLConverterBase):
+            charset_name = CharacterSet.get_info(self._charset_id)[0]
+            self._converter_class = convclass
+            self.converter = convclass(charset_name, self._use_unicode)
+        else:
+            raise TypeError("Converter class should be a subclass "
+                            "of conversion.MySQLConverterBase.")
+
+    @abstractmethod
+    def get_rows(self, count=None, binary=False, columns=None, raw=None,
+                 prep_stmt=None):
+        """Get all rows returned by the MySQL server"""
+        pass
+
+    def cmd_init_db(self, database):
+        """Change the current database"""
+        raise NotImplementedError
+
+    def cmd_query(self, query, raw=False, buffered=False, raw_as_string=False):
+        """Send a query to the MySQL server"""
+        raise NotImplementedError
+
+    def cmd_query_iter(self, statements):
+        """Send one or more statements to the MySQL server"""
+        raise NotImplementedError
+
+    def cmd_refresh(self, options):
+        """Send the Refresh command to the MySQL server"""
+        raise NotImplementedError
+
+    def cmd_quit(self):
+        """Close the current connection with the server"""
+        raise NotImplementedError
+
+    def cmd_shutdown(self, shutdown_type=None):
+        """Shut down the MySQL Server"""
+        raise NotImplementedError
+
+    def cmd_statistics(self):
+        """Send the statistics command to the MySQL Server"""
+        raise NotImplementedError
+
+    def cmd_process_info(self):
+        """Get the process list of the MySQL Server
+
+        This method is a placeholder to notify that the PROCESS_INFO command
+        is not supported by raising the NotSupportedError. The command
+        "SHOW PROCESSLIST" should be send using the cmd_query()-method or
+        using the INFORMATION_SCHEMA database.
+
+        Raises NotSupportedError exception
+        """
+        raise errors.NotSupportedError(
+            "Not implemented. Use SHOW PROCESSLIST or INFORMATION_SCHEMA")
+
+    def cmd_process_kill(self, mysql_pid):
+        """Kill a MySQL process"""
+        raise NotImplementedError
+
+    def cmd_debug(self):
+        """Send the DEBUG command"""
+        raise NotImplementedError
+
+    def cmd_ping(self):
+        """Send the PING command"""
+        raise NotImplementedError
+
+    def cmd_change_user(self, username='', password='', database='',
+                        charset=45):
+        """Change the current logged in user"""
+        raise NotImplementedError
+
+    def cmd_stmt_prepare(self, statement):
+        """Prepare a MySQL statement"""
+        raise NotImplementedError
+
+    def cmd_stmt_execute(self, statement_id, data=(), parameters=(), flags=0):
+        """Execute a prepared MySQL statement"""
+        raise NotImplementedError
+
+    def cmd_stmt_close(self, statement_id):
+        """Deallocate a prepared MySQL statement"""
+        raise NotImplementedError
+
+    def cmd_stmt_send_long_data(self, statement_id, param_id, data):
+        """Send data for a column"""
+        raise NotImplementedError
+
+    def cmd_stmt_reset(self, statement_id):
+        """Reset data for prepared statement sent as long data"""
+        raise NotImplementedError
+
+    def cmd_reset_connection(self):
+        """Resets the session state without re-authenticating"""
+        raise NotImplementedError
+
+
+@make_abc(ABCMeta)
+class MySQLCursorAbstract(object):
+    """Abstract cursor class
+
+    Abstract class defining cursor class with method and members
+    required by the Python Database API Specification v2.0.
+    """
+    def __init__(self):
+        """Initialization"""
+        self._description = None
+        self._rowcount = -1
+        self._last_insert_id = None
+        self._warnings = None
+        self.arraysize = 1
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.close()
+
+    @abstractmethod
+    def callproc(self, procname, args=()):
+        """Calls a stored procedure with the given arguments
+
+        The arguments will be set during this session, meaning
+        they will be called like  _<procname>__arg<nr> where
+        <nr> is an enumeration (+1) of the arguments.
+
+        Coding Example:
+          1) Defining the Stored Routine in MySQL:
+          CREATE PROCEDURE multiply(IN pFac1 INT, IN pFac2 INT, OUT pProd INT)
+          BEGIN
+            SET pProd := pFac1 * pFac2;
+          END
+
+          2) Executing in Python:
+          args = (5,5,0) # 0 is to hold pprod
+          cursor.callproc('multiply', args)
+          print(cursor.fetchone())
+
+        Does not return a value, but a result set will be
+        available when the CALL-statement execute successfully.
+        Raises exceptions when something is wrong.
+        """
+        pass
+
+    @abstractmethod
+    def close(self):
+        """Close the cursor."""
+        pass
+
+    @abstractmethod
+    def execute(self, operation, params=(), multi=False):
+        """Executes the given operation
+
+        Executes the given operation substituting any markers with
+        the given parameters.
+
+        For example, getting all rows where id is 5:
+          cursor.execute("SELECT * FROM t1 WHERE id = %s", (5,))
+
+        The multi argument should be set to True when executing multiple
+        statements in one operation. If not set and multiple results are
+        found, an InterfaceError will be raised.
+
+        If warnings where generated, and connection.get_warnings is True, then
+        self._warnings will be a list containing these warnings.
+
+        Returns an iterator when multi is True, otherwise None.
+        """
+        pass
+
+    @abstractmethod
+    def executemany(self, operation, seq_params):
+        """Execute the given operation multiple times
+
+        The executemany() method will execute the operation iterating
+        over the list of parameters in seq_params.
+
+        Example: Inserting 3 new employees and their phone number
+
+        data = [
+            ('Jane','555-001'),
+            ('Joe', '555-001'),
+            ('John', '555-003')
+            ]
+        stmt = "INSERT INTO employees (name, phone) VALUES ('%s','%s')"
+        cursor.executemany(stmt, data)
+
+        INSERT statements are optimized by batching the data, that is
+        using the MySQL multiple rows syntax.
+
+        Results are discarded. If they are needed, consider looping over
+        data using the execute() method.
+        """
+        pass
+
+    @abstractmethod
+    def fetchone(self):
+        """Returns next row of a query result set
+
+        Returns a tuple or None.
+        """
+        pass
+
+    @abstractmethod
+    def fetchmany(self, size=1):
+        """Returns the next set of rows of a query result, returning a
+        list of tuples. When no more rows are available, it returns an
+        empty list.
+
+        The number of rows returned can be specified using the size argument,
+        which defaults to one
+        """
+        pass
+
+    @abstractmethod
+    def fetchall(self):
+        """Returns all rows of a query result set
+
+        Returns a list of tuples.
+        """
+        pass
+
+    def nextset(self):
+        """Not Implemented."""
+        pass
+
+    def setinputsizes(self, sizes):
+        """Not Implemented."""
+        pass
+
+    def setoutputsize(self, size, column=None):
+        """Not Implemented."""
+        pass
+
+    def reset(self, free=True):
+        """Reset the cursor to default"""
+        pass
+
+    @abstractproperty
+    def description(self):
+        """Returns description of columns in a result
+
+        This property returns a list of tuples describing the columns in
+        in a result set. A tuple is described as follows::
+
+                (column_name,
+                 type,
+                 None,
+                 None,
+                 None,
+                 None,
+                 null_ok,
+                 column_flags)  # Addition to PEP-249 specs
+
+        Returns a list of tuples.
+        """
+        return self._description
+
+    @abstractproperty
+    def rowcount(self):
+        """Returns the number of rows produced or affected
+
+        This property returns the number of rows produced by queries
+        such as a SELECT, or affected rows when executing DML statements
+        like INSERT or UPDATE.
+
+        Note that for non-buffered cursors it is impossible to know the
+        number of rows produced before having fetched them all. For those,
+        the number of rows will be -1 right after execution, and
+        incremented when fetching rows.
+
+        Returns an integer.
+        """
+        return self._rowcount
+
+    @abstractproperty
+    def lastrowid(self):
+        """Returns the value generated for an AUTO_INCREMENT column
+
+        Returns the value generated for an AUTO_INCREMENT column by
+        the previous INSERT or UPDATE statement or None when there is
+        no such value available.
+
+        Returns a long value or None.
+        """
+        return self._last_insert_id
+
+    def fetchwarnings(self):
+        """Returns Warnings."""
+        return self._warnings
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/authentication.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/authentication.py
new file mode 100644
index 0000000..7e49336
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/authentication.py
@@ -0,0 +1,534 @@
+# Copyright (c) 2014, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementing support for MySQL Authentication Plugins"""
+
+from base64 import b64encode, b64decode
+from hashlib import sha1, sha256
+import hmac
+import logging
+import struct
+from uuid import uuid4
+
+from . import errors
+from .catch23 import PY2, isstr, UNICODE_TYPES, STRING_TYPES
+from .utils import (normalize_unicode_string as norm_ustr,
+                    validate_normalized_unicode_string as valid_norm)
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class BaseAuthPlugin(object):
+    """Base class for authentication plugins
+
+
+    Classes inheriting from BaseAuthPlugin should implement the method
+    prepare_password(). When instantiating, auth_data argument is
+    required. The username, password and database are optional. The
+    ssl_enabled argument can be used to tell the plugin whether SSL is
+    active or not.
+
+    The method auth_response() method is used to retrieve the password
+    which was prepared by prepare_password().
+    """
+
+    requires_ssl = False
+    plugin_name = ''
+
+    def __init__(self, auth_data, username=None, password=None, database=None,
+                 ssl_enabled=False):
+        """Initialization"""
+        self._auth_data = auth_data
+        self._username = username
+        self._password = password
+        self._database = database
+        self._ssl_enabled = ssl_enabled
+
+    def prepare_password(self):
+        """Prepares and returns password to be send to MySQL
+
+        This method needs to be implemented by classes inheriting from
+        this class. It is used by the auth_response() method.
+
+        Raises NotImplementedError.
+        """
+        raise NotImplementedError
+
+    def auth_response(self):
+        """Returns the prepared password to send to MySQL
+
+        Raises InterfaceError on errors. For example, when SSL is required
+        by not enabled.
+
+        Returns str
+        """
+        if self.requires_ssl and not self._ssl_enabled:
+            raise errors.InterfaceError("{name} requires SSL".format(
+                name=self.plugin_name))
+        return self.prepare_password()
+
+
+class MySQLNativePasswordAuthPlugin(BaseAuthPlugin):
+    """Class implementing the MySQL Native Password authentication plugin"""
+
+    requires_ssl = False
+    plugin_name = 'mysql_native_password'
+
+    def prepare_password(self):
+        """Prepares and returns password as native MySQL 4.1+ password"""
+        if not self._auth_data:
+            raise errors.InterfaceError("Missing authentication data (seed)")
+
+        if not self._password:
+            return b''
+        password = self._password
+
+        if isstr(self._password):
+            password = self._password.encode('utf-8')
+        else:
+            password = self._password
+
+        if PY2:
+            password = buffer(password)  # pylint: disable=E0602
+            try:
+                auth_data = buffer(self._auth_data)  # pylint: disable=E0602
+            except TypeError:
+                raise errors.InterfaceError("Authentication data incorrect")
+        else:
+            password = password
+            auth_data = self._auth_data
+
+        hash4 = None
+        try:
+            hash1 = sha1(password).digest()
+            hash2 = sha1(hash1).digest()
+            hash3 = sha1(auth_data + hash2).digest()
+            if PY2:
+                xored = [ord(h1) ^ ord(h3) for (h1, h3) in zip(hash1, hash3)]
+            else:
+                xored = [h1 ^ h3 for (h1, h3) in zip(hash1, hash3)]
+            hash4 = struct.pack('20B', *xored)
+        except Exception as exc:
+            raise errors.InterfaceError(
+                "Failed scrambling password; {0}".format(exc))
+
+        return hash4
+
+
+class MySQLClearPasswordAuthPlugin(BaseAuthPlugin):
+    """Class implementing the MySQL Clear Password authentication plugin"""
+
+    requires_ssl = True
+    plugin_name = 'mysql_clear_password'
+
+    def prepare_password(self):
+        """Returns password as as clear text"""
+        if not self._password:
+            return b'\x00'
+        password = self._password
+
+        if PY2:
+            if isinstance(password, unicode):  # pylint: disable=E0602
+                password = password.encode('utf8')
+        elif isinstance(password, str):
+            password = password.encode('utf8')
+
+        return password + b'\x00'
+
+
+class MySQLSHA256PasswordAuthPlugin(BaseAuthPlugin):
+    """Class implementing the MySQL SHA256 authentication plugin
+
+    Note that encrypting using RSA is not supported since the Python
+    Standard Library does not provide this OpenSSL functionality.
+    """
+
+    requires_ssl = True
+    plugin_name = 'sha256_password'
+
+    def prepare_password(self):
+        """Returns password as as clear text"""
+        if not self._password:
+            return b'\x00'
+        password = self._password
+
+        if PY2:
+            if isinstance(password, unicode):  # pylint: disable=E0602
+                password = password.encode('utf8')
+        elif isinstance(password, str):
+            password = password.encode('utf8')
+
+        return password + b'\x00'
+
+
+class MySQLCachingSHA2PasswordAuthPlugin(BaseAuthPlugin):
+    """Class implementing the MySQL caching_sha2_password authentication plugin
+
+    Note that encrypting using RSA is not supported since the Python
+    Standard Library does not provide this OpenSSL functionality.
+    """
+    requires_ssl = False
+    plugin_name = 'caching_sha2_password'
+    perform_full_authentication = 4
+    fast_auth_success = 3
+
+    def _scramble(self):
+        """ Returns a scramble of the password using a Nonce sent by the
+        server.
+
+        The scramble is of the form:
+        XOR(SHA2(password), SHA2(SHA2(SHA2(password)), Nonce))
+        """
+        if not self._auth_data:
+            raise errors.InterfaceError("Missing authentication data (seed)")
+
+        if not self._password:
+            return b''
+
+        password = self._password.encode('utf-8') \
+            if isinstance(self._password, UNICODE_TYPES) else self._password
+
+        if PY2:
+            password = buffer(password)  # pylint: disable=E0602
+            try:
+                auth_data = buffer(self._auth_data)  # pylint: disable=E0602
+            except TypeError:
+                raise errors.InterfaceError("Authentication data incorrect")
+        else:
+            password = password
+            auth_data = self._auth_data
+
+        hash1 = sha256(password).digest()
+        hash2 = sha256()
+        hash2.update(sha256(hash1).digest())
+        hash2.update(auth_data)
+        hash2 = hash2.digest()
+        if PY2:
+            xored = [ord(h1) ^ ord(h2) for (h1, h2) in zip(hash1, hash2)]
+        else:
+            xored = [h1 ^ h2 for (h1, h2) in zip(hash1, hash2)]
+        hash3 = struct.pack('32B', *xored)
+
+        return hash3
+
+    def prepare_password(self):
+        if len(self._auth_data) > 1:
+            return self._scramble()
+        elif self._auth_data[0] == self.perform_full_authentication:
+            return self._full_authentication()
+        return None
+
+    def _full_authentication(self):
+        """Returns password as as clear text"""
+        if not self._ssl_enabled:
+            raise errors.InterfaceError("{name} requires SSL".format(
+                name=self.plugin_name))
+
+        if not self._password:
+            return b'\x00'
+        password = self._password
+
+        if PY2:
+            if isinstance(password, UNICODE_TYPES):  # pylint: disable=E0602
+                password = password.encode('utf8')
+        elif isinstance(password, str):
+            password = password.encode('utf8')
+
+        return password + b'\x00'
+
+
+class MySQLLdapSaslPasswordAuthPlugin(BaseAuthPlugin):
+    """Class implementing the MySQL ldap sasl authentication plugin.
+
+    The MySQL's ldap sasl authentication plugin support two authentication
+    methods SCRAM-SHA-1 and GSSAPI (using Kerberos). This implementation only
+    support SCRAM-SHA-1.
+
+    SCRAM-SHA-1
+        This method requires 2 messages from client and 2 responses from
+        server.
+
+        The first message from client will be generated by prepare_password(),
+        after receive the response from the server, it is required that this
+        response is passed back to auth_continue() which will return the
+        second message from the client. After send this second message to the
+        server, the second server respond needs to be passed to auth_finalize()
+        to finish the authentication process.
+    """
+    requires_ssl = False
+    plugin_name = 'authentication_ldap_sasl_client'
+    def_digest_mode = sha1
+    client_nonce = None
+    client_salt = None
+    server_salt = None
+    iterations = 0
+    server_auth_var = None
+
+    def _xor(self, bytes1, bytes2):
+        if PY2:
+            xor = [ord(b1) ^ ord(b2) for b1, b2 in zip(bytes1, bytes2)]
+            xor = b"".join([chr(i) for i in xor])
+            return xor
+        else:
+            return bytes([b1 ^ b2 for b1, b2 in zip(bytes1, bytes2)])
+
+    def _hmac(self, password, salt):
+        digest_maker = hmac.new(password, salt, self.def_digest_mode)
+        return digest_maker.digest()
+
+    def _hi(self, password, salt, count):
+        """Prepares Hi
+        Hi(password, salt, iterations) where Hi(p,s,i) is defined as
+        PBKDF2 (HMAC, p, s, i, output length of H).
+
+        """
+        pw = password.encode()
+        hi = self._hmac(pw, salt + b'\x00\x00\x00\x01')
+        aux = hi
+        for _ in range(count - 1):
+            aux = self._hmac(pw, aux)
+            hi = self._xor(hi, aux)
+        return hi
+
+    def _normalize(self, string):
+        norm_str = norm_ustr(string)
+        broken_rule = valid_norm(norm_str)
+        if broken_rule is not None:
+            raise errors.InterfaceError("broken_rule: {}".format(broken_rule))
+            char, rule = broken_rule
+            raise errors.InterfaceError(
+                "Unable to normalice character: `{}` in `{}` due to {}"
+                "".format(char, string, rule))
+        return norm_str
+
+    def _first_message(self):
+        """This method generates the first message to the server to start the
+
+        The client-first message consists of a gs2-header,
+        the desired username, and a randomly generated client nonce cnonce.
+
+        The first message from the server has the form:
+            b'n,a=<user_name>,n=<user_name>,r=<client_nonce>
+
+        Returns client's first message
+        """
+        cfm_fprnat = "n,a={user_name},n={user_name},r={client_nonce}"
+        self.client_nonce = str(uuid4()).replace("-", "")
+        cfm = cfm_fprnat.format(user_name=self._normalize(self._username),
+                                client_nonce=self.client_nonce)
+
+        if PY2:
+            if isinstance(cfm, UNICODE_TYPES):  # pylint: disable=E0602
+                cfm = cfm.encode('utf8')
+        elif isinstance(cfm, str):
+            cfm = cfm.encode('utf8')
+        return cfm
+
+    def auth_response(self):
+        """This method will prepare the fist message to the server.
+
+        Returns bytes to send to the server as the first message.
+        """
+        # We only support SCRAM-SHA-1 authentication method.
+        _LOGGER.debug("read_method_name_from_server: %s",
+                      self._auth_data.decode())
+        if self._auth_data != b'SCRAM-SHA-1':
+            raise errors.InterfaceError(
+                'The sasl authentication method "{}" requested from the server '
+                'is not supported. Only "{}" is supported'.format(
+                    self._auth_data, "SCRAM-SHA-1"))
+
+        return self._first_message()
+
+    def _second_message(self):
+        """This method generates the second message to the server
+
+        Second message consist on the concatenation of the client and the
+        server nonce, and cproof.
+
+        c=<n,a=<user_name>>,r=<server_nonce>,p=<client_proof>
+        where:
+            <client_proof>: xor(<client_key>, <client_signature>)
+
+            <client_key>: hmac(salted_password, b"Client Key")
+            <client_signature>: hmac(<stored_key>, <auth_msg>)
+            <stored_key>: h(<client_key>)
+            <auth_msg>: <client_first_no_header>,<servers_first>,
+                        c=<client_header>,r=<server_nonce>
+            <client_first_no_header>: n=<username>r=<client_nonce>
+        """
+        if not self._auth_data:
+            raise errors.InterfaceError("Missing authentication data (seed)")
+
+        passw = self._normalize(self._password)
+        salted_password = self._hi(passw,
+                                   b64decode(self.server_salt),
+                                   self.iterations)
+
+        _LOGGER.debug("salted_password: %s",
+                      b64encode(salted_password).decode())
+
+        client_key = self._hmac(salted_password, b"Client Key")
+        _LOGGER.debug("client_key: %s", b64encode(client_key).decode())
+
+        stored_key = self.def_digest_mode(client_key).digest()
+        _LOGGER.debug("stored_key: %s", b64encode(stored_key).decode())
+
+        server_key = self._hmac(salted_password, b"Server Key")
+        _LOGGER.debug("server_key: %s", b64encode(server_key).decode())
+
+        client_first_no_header = ",".join([
+            "n={}".format(self._normalize(self._username)),
+            "r={}".format(self.client_nonce)])
+        _LOGGER.debug("client_first_no_header: %s", client_first_no_header)
+        auth_msg = ','.join([
+            client_first_no_header,
+            self.servers_first,
+            "c={}".format(b64encode("n,a={},".format(
+                self._normalize(self._username)).encode()).decode()),
+            "r={}".format(self.server_nonce)])
+        _LOGGER.debug("auth_msg: %s", auth_msg)
+
+        client_signature = self._hmac(stored_key, auth_msg.encode())
+        _LOGGER.debug("client_signature: %s",
+                      b64encode(client_signature).decode())
+
+        client_proof = self._xor(client_key, client_signature)
+        _LOGGER.debug("client_proof: %s", b64encode(client_proof).decode())
+
+        self.server_auth_var = b64encode(
+            self._hmac(server_key, auth_msg.encode())).decode()
+        _LOGGER.debug("server_auth_var: %s", self.server_auth_var)
+
+        client_header = b64encode(
+            "n,a={},".format(self._normalize(self._username)).encode()).decode()
+        msg = ",".join(["c={}".format(client_header),
+                        "r={}".format(self.server_nonce),
+                        "p={}".format(b64encode(client_proof).decode())])
+        _LOGGER.debug("second_message: %s", msg)
+        return msg.encode()
+
+    def _validate_first_reponse(self, servers_first):
+        """Validates first message from the server.
+
+        Extracts the server's salt and iterations from the servers 1st response.
+        First message from the server is in the form:
+            <server_salt>,i=<iterations>
+        """
+        self.servers_first = servers_first
+        if not servers_first or not isinstance(servers_first, STRING_TYPES):
+            raise errors.InterfaceError("Unexpected server message: {}"
+                                        "".format(servers_first))
+        try:
+            r_server_nonce, s_salt, i_counter = servers_first.split(",")
+        except ValueError:
+            raise errors.InterfaceError("Unexpected server message: {}"
+                                        "".format(servers_first))
+        if not r_server_nonce.startswith("r=") or \
+           not s_salt.startswith("s=") or \
+           not i_counter.startswith("i="):
+            raise errors.InterfaceError("Incomplete reponse from the server: {}"
+                                        "".format(servers_first))
+        if self.client_nonce in r_server_nonce:
+            self.server_nonce = r_server_nonce[2:]
+            _LOGGER.debug("server_nonce: %s", self.server_nonce)
+        else:
+            raise errors.InterfaceError("Unable to authenticate response: "
+                                        "response not well formed {}"
+                                        "".format(servers_first))
+        self.server_salt = s_salt[2:]
+        _LOGGER.debug("server_salt: %s length: %s", self.server_salt,
+                       len(self.server_salt))
+        try:
+            i_counter = i_counter[2:]
+            _LOGGER.debug("iterations: {}".format(i_counter))
+            self.iterations = int(i_counter)
+        except:
+            raise errors.InterfaceError("Unable to authenticate: iterations "
+                                        "not found {}".format(servers_first))
+
+    def auth_continue(self, servers_first_response):
+        """return the second message from the client.
+
+        Returns bytes to send to the server as the second message.
+        """
+        self._validate_first_reponse(servers_first_response)
+        return self._second_message()
+
+    def _validate_second_reponse(self, servers_second):
+        """Validates second message from the server.
+
+        The client and the server prove to each other they have the same Auth
+        variable.
+
+        The second message from the server consist of the server's proof:
+            server_proof = HMAC(<server_key>, <auth_msg>)
+            where:
+                <server_key>: hmac(<salted_password>, b"Server Key")
+                <auth_msg>: <client_first_no_header>,<servers_first>,
+                            c=<client_header>,r=<server_nonce>
+
+        Our server_proof must be equal to the Auth variable send on this second
+        response.
+        """
+        if not servers_second or not isinstance(servers_second, bytearray) or \
+           len(servers_second)<=2 or not servers_second.startswith(b"v="):
+            raise errors.InterfaceError("The server's proof is not well formated.")
+        server_var = servers_second[2:].decode()
+        _LOGGER.debug("server auth variable: %s", server_var)
+        return self.server_auth_var == server_var
+
+    def auth_finalize(self, servers_second_response):
+        """finalize the authentication process.
+
+        Raises errors.InterfaceError if the ervers_second_response is invalid.
+
+        Returns True in succesfull authentication False otherwise.
+        """
+        if not self._validate_second_reponse(servers_second_response):
+            raise errors.InterfaceError("Authentication failed: Unable to "
+                                        "proof server identity.")
+        return True
+
+
+def get_auth_plugin(plugin_name):
+    """Return authentication class based on plugin name
+
+    This function returns the class for the authentication plugin plugin_name.
+    The returned class is a subclass of BaseAuthPlugin.
+
+    Raises errors.NotSupportedError when plugin_name is not supported.
+
+    Returns subclass of BaseAuthPlugin.
+    """
+    for authclass in BaseAuthPlugin.__subclasses__():  # pylint: disable=E1101
+        if authclass.plugin_name == plugin_name:
+            return authclass
+
+    raise errors.NotSupportedError(
+        "Authentication plugin '{0}' is not supported".format(plugin_name))
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/catch23.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/catch23.py
new file mode 100644
index 0000000..3152414
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/catch23.py
@@ -0,0 +1,116 @@
+# Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Python v2 to v3 migration module"""
+
+from decimal import Decimal
+import struct
+import sys
+
+from .custom_types import HexLiteral
+
+# pylint: disable=E0602,E1103
+
+PY2 = sys.version_info[0] == 2
+
+if PY2:
+    NUMERIC_TYPES = (int, float, Decimal, HexLiteral, long)
+    INT_TYPES = (int, long)
+    UNICODE_TYPES = (unicode,)
+    STRING_TYPES = (str, unicode)
+    BYTE_TYPES = (bytearray,)
+else:
+    NUMERIC_TYPES = (int, float, Decimal, HexLiteral)
+    INT_TYPES = (int,)
+    UNICODE_TYPES = (str,)
+    STRING_TYPES = (str,)
+    BYTE_TYPES = (bytearray, bytes)
+
+
+def init_bytearray(payload=b'', encoding='utf-8'):
+    """Initializes a bytearray from the payload"""
+    if isinstance(payload, bytearray):
+        return payload
+
+    if PY2:
+        return bytearray(payload)
+
+    if isinstance(payload, int):
+        return bytearray(payload)
+    elif not isinstance(payload, bytes):
+        try:
+            return bytearray(payload.encode(encoding=encoding))
+        except AttributeError:
+            raise ValueError("payload must be a str or bytes")
+
+    return bytearray(payload)
+
+
+def isstr(obj):
+    """Returns whether a variable is a string"""
+    if PY2:
+        return isinstance(obj, basestring)
+    return isinstance(obj, str)
+
+def isunicode(obj):
+    """Returns whether a variable is a of unicode type"""
+    if PY2:
+        return isinstance(obj, unicode)
+    return isinstance(obj, str)
+
+
+if PY2:
+    def struct_unpack(fmt, buf):
+        """Wrapper around struct.unpack handling buffer as bytes and strings"""
+        if isinstance(buf, (bytearray, bytes)):
+            return struct.unpack_from(fmt, buffer(buf))
+        return struct.unpack_from(fmt, buf)
+else:
+    struct_unpack = struct.unpack  # pylint: disable=C0103
+
+
+def make_abc(base_class):
+    """Decorator used to create a abstract base class
+
+    We use this decorator to create abstract base classes instead of
+    using the abc-module. The decorator makes it possible to do the
+    same in both Python v2 and v3 code.
+    """
+    def wrapper(class_):
+        """Wrapper"""
+        attrs = class_.__dict__.copy()
+        for attr in '__dict__', '__weakref__':
+            attrs.pop(attr, None)  # ignore missing attributes
+
+        bases = class_.__bases__
+        if PY2:
+            attrs['__metaclass__'] = class_
+        else:
+            bases = (class_,) + bases
+        return base_class(class_.__name__, bases, attrs)
+    return wrapper
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/charsets.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/charsets.py
new file mode 100644
index 0000000..76ebaeb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/charsets.py
@@ -0,0 +1,350 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# This file was auto-generated.
+_GENERATED_ON = '2019-04-29'
+_MYSQL_VERSION = (8, 0, 17)
+
+"""This module contains the MySQL Server Character Sets"""
+
+MYSQL_CHARACTER_SETS = [
+    # (character set name, collation, default)
+    None,
+    ("big5", "big5_chinese_ci", True),  # 1
+    ("latin2", "latin2_czech_cs", False),  # 2
+    ("dec8", "dec8_swedish_ci", True),  # 3
+    ("cp850", "cp850_general_ci", True),  # 4
+    ("latin1", "latin1_german1_ci", False),  # 5
+    ("hp8", "hp8_english_ci", True),  # 6
+    ("koi8r", "koi8r_general_ci", True),  # 7
+    ("latin1", "latin1_swedish_ci", True),  # 8
+    ("latin2", "latin2_general_ci", True),  # 9
+    ("swe7", "swe7_swedish_ci", True),  # 10
+    ("ascii", "ascii_general_ci", True),  # 11
+    ("ujis", "ujis_japanese_ci", True),  # 12
+    ("sjis", "sjis_japanese_ci", True),  # 13
+    ("cp1251", "cp1251_bulgarian_ci", False),  # 14
+    ("latin1", "latin1_danish_ci", False),  # 15
+    ("hebrew", "hebrew_general_ci", True),  # 16
+    None,
+    ("tis620", "tis620_thai_ci", True),  # 18
+    ("euckr", "euckr_korean_ci", True),  # 19
+    ("latin7", "latin7_estonian_cs", False),  # 20
+    ("latin2", "latin2_hungarian_ci", False),  # 21
+    ("koi8u", "koi8u_general_ci", True),  # 22
+    ("cp1251", "cp1251_ukrainian_ci", False),  # 23
+    ("gb2312", "gb2312_chinese_ci", True),  # 24
+    ("greek", "greek_general_ci", True),  # 25
+    ("cp1250", "cp1250_general_ci", True),  # 26
+    ("latin2", "latin2_croatian_ci", False),  # 27
+    ("gbk", "gbk_chinese_ci", True),  # 28
+    ("cp1257", "cp1257_lithuanian_ci", False),  # 29
+    ("latin5", "latin5_turkish_ci", True),  # 30
+    ("latin1", "latin1_german2_ci", False),  # 31
+    ("armscii8", "armscii8_general_ci", True),  # 32
+    ("utf8", "utf8_general_ci", True),  # 33
+    ("cp1250", "cp1250_czech_cs", False),  # 34
+    ("ucs2", "ucs2_general_ci", True),  # 35
+    ("cp866", "cp866_general_ci", True),  # 36
+    ("keybcs2", "keybcs2_general_ci", True),  # 37
+    ("macce", "macce_general_ci", True),  # 38
+    ("macroman", "macroman_general_ci", True),  # 39
+    ("cp852", "cp852_general_ci", True),  # 40
+    ("latin7", "latin7_general_ci", True),  # 41
+    ("latin7", "latin7_general_cs", False),  # 42
+    ("macce", "macce_bin", False),  # 43
+    ("cp1250", "cp1250_croatian_ci", False),  # 44
+    ("utf8mb4", "utf8mb4_general_ci", False),  # 45
+    ("utf8mb4", "utf8mb4_bin", False),  # 46
+    ("latin1", "latin1_bin", False),  # 47
+    ("latin1", "latin1_general_ci", False),  # 48
+    ("latin1", "latin1_general_cs", False),  # 49
+    ("cp1251", "cp1251_bin", False),  # 50
+    ("cp1251", "cp1251_general_ci", True),  # 51
+    ("cp1251", "cp1251_general_cs", False),  # 52
+    ("macroman", "macroman_bin", False),  # 53
+    ("utf16", "utf16_general_ci", True),  # 54
+    ("utf16", "utf16_bin", False),  # 55
+    ("utf16le", "utf16le_general_ci", True),  # 56
+    ("cp1256", "cp1256_general_ci", True),  # 57
+    ("cp1257", "cp1257_bin", False),  # 58
+    ("cp1257", "cp1257_general_ci", True),  # 59
+    ("utf32", "utf32_general_ci", True),  # 60
+    ("utf32", "utf32_bin", False),  # 61
+    ("utf16le", "utf16le_bin", False),  # 62
+    ("binary", "binary", True),  # 63
+    ("armscii8", "armscii8_bin", False),  # 64
+    ("ascii", "ascii_bin", False),  # 65
+    ("cp1250", "cp1250_bin", False),  # 66
+    ("cp1256", "cp1256_bin", False),  # 67
+    ("cp866", "cp866_bin", False),  # 68
+    ("dec8", "dec8_bin", False),  # 69
+    ("greek", "greek_bin", False),  # 70
+    ("hebrew", "hebrew_bin", False),  # 71
+    ("hp8", "hp8_bin", False),  # 72
+    ("keybcs2", "keybcs2_bin", False),  # 73
+    ("koi8r", "koi8r_bin", False),  # 74
+    ("koi8u", "koi8u_bin", False),  # 75
+    ("utf8", "utf8_tolower_ci", False),  # 76
+    ("latin2", "latin2_bin", False),  # 77
+    ("latin5", "latin5_bin", False),  # 78
+    ("latin7", "latin7_bin", False),  # 79
+    ("cp850", "cp850_bin", False),  # 80
+    ("cp852", "cp852_bin", False),  # 81
+    ("swe7", "swe7_bin", False),  # 82
+    ("utf8", "utf8_bin", False),  # 83
+    ("big5", "big5_bin", False),  # 84
+    ("euckr", "euckr_bin", False),  # 85
+    ("gb2312", "gb2312_bin", False),  # 86
+    ("gbk", "gbk_bin", False),  # 87
+    ("sjis", "sjis_bin", False),  # 88
+    ("tis620", "tis620_bin", False),  # 89
+    ("ucs2", "ucs2_bin", False),  # 90
+    ("ujis", "ujis_bin", False),  # 91
+    ("geostd8", "geostd8_general_ci", True),  # 92
+    ("geostd8", "geostd8_bin", False),  # 93
+    ("latin1", "latin1_spanish_ci", False),  # 94
+    ("cp932", "cp932_japanese_ci", True),  # 95
+    ("cp932", "cp932_bin", False),  # 96
+    ("eucjpms", "eucjpms_japanese_ci", True),  # 97
+    ("eucjpms", "eucjpms_bin", False),  # 98
+    ("cp1250", "cp1250_polish_ci", False),  # 99
+    None,
+    ("utf16", "utf16_unicode_ci", False),  # 101
+    ("utf16", "utf16_icelandic_ci", False),  # 102
+    ("utf16", "utf16_latvian_ci", False),  # 103
+    ("utf16", "utf16_romanian_ci", False),  # 104
+    ("utf16", "utf16_slovenian_ci", False),  # 105
+    ("utf16", "utf16_polish_ci", False),  # 106
+    ("utf16", "utf16_estonian_ci", False),  # 107
+    ("utf16", "utf16_spanish_ci", False),  # 108
+    ("utf16", "utf16_swedish_ci", False),  # 109
+    ("utf16", "utf16_turkish_ci", False),  # 110
+    ("utf16", "utf16_czech_ci", False),  # 111
+    ("utf16", "utf16_danish_ci", False),  # 112
+    ("utf16", "utf16_lithuanian_ci", False),  # 113
+    ("utf16", "utf16_slovak_ci", False),  # 114
+    ("utf16", "utf16_spanish2_ci", False),  # 115
+    ("utf16", "utf16_roman_ci", False),  # 116
+    ("utf16", "utf16_persian_ci", False),  # 117
+    ("utf16", "utf16_esperanto_ci", False),  # 118
+    ("utf16", "utf16_hungarian_ci", False),  # 119
+    ("utf16", "utf16_sinhala_ci", False),  # 120
+    ("utf16", "utf16_german2_ci", False),  # 121
+    ("utf16", "utf16_croatian_ci", False),  # 122
+    ("utf16", "utf16_unicode_520_ci", False),  # 123
+    ("utf16", "utf16_vietnamese_ci", False),  # 124
+    None,
+    None,
+    None,
+    ("ucs2", "ucs2_unicode_ci", False),  # 128
+    ("ucs2", "ucs2_icelandic_ci", False),  # 129
+    ("ucs2", "ucs2_latvian_ci", False),  # 130
+    ("ucs2", "ucs2_romanian_ci", False),  # 131
+    ("ucs2", "ucs2_slovenian_ci", False),  # 132
+    ("ucs2", "ucs2_polish_ci", False),  # 133
+    ("ucs2", "ucs2_estonian_ci", False),  # 134
+    ("ucs2", "ucs2_spanish_ci", False),  # 135
+    ("ucs2", "ucs2_swedish_ci", False),  # 136
+    ("ucs2", "ucs2_turkish_ci", False),  # 137
+    ("ucs2", "ucs2_czech_ci", False),  # 138
+    ("ucs2", "ucs2_danish_ci", False),  # 139
+    ("ucs2", "ucs2_lithuanian_ci", False),  # 140
+    ("ucs2", "ucs2_slovak_ci", False),  # 141
+    ("ucs2", "ucs2_spanish2_ci", False),  # 142
+    ("ucs2", "ucs2_roman_ci", False),  # 143
+    ("ucs2", "ucs2_persian_ci", False),  # 144
+    ("ucs2", "ucs2_esperanto_ci", False),  # 145
+    ("ucs2", "ucs2_hungarian_ci", False),  # 146
+    ("ucs2", "ucs2_sinhala_ci", False),  # 147
+    ("ucs2", "ucs2_german2_ci", False),  # 148
+    ("ucs2", "ucs2_croatian_ci", False),  # 149
+    ("ucs2", "ucs2_unicode_520_ci", False),  # 150
+    ("ucs2", "ucs2_vietnamese_ci", False),  # 151
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    ("ucs2", "ucs2_general_mysql500_ci", False),  # 159
+    ("utf32", "utf32_unicode_ci", False),  # 160
+    ("utf32", "utf32_icelandic_ci", False),  # 161
+    ("utf32", "utf32_latvian_ci", False),  # 162
+    ("utf32", "utf32_romanian_ci", False),  # 163
+    ("utf32", "utf32_slovenian_ci", False),  # 164
+    ("utf32", "utf32_polish_ci", False),  # 165
+    ("utf32", "utf32_estonian_ci", False),  # 166
+    ("utf32", "utf32_spanish_ci", False),  # 167
+    ("utf32", "utf32_swedish_ci", False),  # 168
+    ("utf32", "utf32_turkish_ci", False),  # 169
+    ("utf32", "utf32_czech_ci", False),  # 170
+    ("utf32", "utf32_danish_ci", False),  # 171
+    ("utf32", "utf32_lithuanian_ci", False),  # 172
+    ("utf32", "utf32_slovak_ci", False),  # 173
+    ("utf32", "utf32_spanish2_ci", False),  # 174
+    ("utf32", "utf32_roman_ci", False),  # 175
+    ("utf32", "utf32_persian_ci", False),  # 176
+    ("utf32", "utf32_esperanto_ci", False),  # 177
+    ("utf32", "utf32_hungarian_ci", False),  # 178
+    ("utf32", "utf32_sinhala_ci", False),  # 179
+    ("utf32", "utf32_german2_ci", False),  # 180
+    ("utf32", "utf32_croatian_ci", False),  # 181
+    ("utf32", "utf32_unicode_520_ci", False),  # 182
+    ("utf32", "utf32_vietnamese_ci", False),  # 183
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    ("utf8", "utf8_unicode_ci", False),  # 192
+    ("utf8", "utf8_icelandic_ci", False),  # 193
+    ("utf8", "utf8_latvian_ci", False),  # 194
+    ("utf8", "utf8_romanian_ci", False),  # 195
+    ("utf8", "utf8_slovenian_ci", False),  # 196
+    ("utf8", "utf8_polish_ci", False),  # 197
+    ("utf8", "utf8_estonian_ci", False),  # 198
+    ("utf8", "utf8_spanish_ci", False),  # 199
+    ("utf8", "utf8_swedish_ci", False),  # 200
+    ("utf8", "utf8_turkish_ci", False),  # 201
+    ("utf8", "utf8_czech_ci", False),  # 202
+    ("utf8", "utf8_danish_ci", False),  # 203
+    ("utf8", "utf8_lithuanian_ci", False),  # 204
+    ("utf8", "utf8_slovak_ci", False),  # 205
+    ("utf8", "utf8_spanish2_ci", False),  # 206
+    ("utf8", "utf8_roman_ci", False),  # 207
+    ("utf8", "utf8_persian_ci", False),  # 208
+    ("utf8", "utf8_esperanto_ci", False),  # 209
+    ("utf8", "utf8_hungarian_ci", False),  # 210
+    ("utf8", "utf8_sinhala_ci", False),  # 211
+    ("utf8", "utf8_german2_ci", False),  # 212
+    ("utf8", "utf8_croatian_ci", False),  # 213
+    ("utf8", "utf8_unicode_520_ci", False),  # 214
+    ("utf8", "utf8_vietnamese_ci", False),  # 215
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    ("utf8", "utf8_general_mysql500_ci", False),  # 223
+    ("utf8mb4", "utf8mb4_unicode_ci", False),  # 224
+    ("utf8mb4", "utf8mb4_icelandic_ci", False),  # 225
+    ("utf8mb4", "utf8mb4_latvian_ci", False),  # 226
+    ("utf8mb4", "utf8mb4_romanian_ci", False),  # 227
+    ("utf8mb4", "utf8mb4_slovenian_ci", False),  # 228
+    ("utf8mb4", "utf8mb4_polish_ci", False),  # 229
+    ("utf8mb4", "utf8mb4_estonian_ci", False),  # 230
+    ("utf8mb4", "utf8mb4_spanish_ci", False),  # 231
+    ("utf8mb4", "utf8mb4_swedish_ci", False),  # 232
+    ("utf8mb4", "utf8mb4_turkish_ci", False),  # 233
+    ("utf8mb4", "utf8mb4_czech_ci", False),  # 234
+    ("utf8mb4", "utf8mb4_danish_ci", False),  # 235
+    ("utf8mb4", "utf8mb4_lithuanian_ci", False),  # 236
+    ("utf8mb4", "utf8mb4_slovak_ci", False),  # 237
+    ("utf8mb4", "utf8mb4_spanish2_ci", False),  # 238
+    ("utf8mb4", "utf8mb4_roman_ci", False),  # 239
+    ("utf8mb4", "utf8mb4_persian_ci", False),  # 240
+    ("utf8mb4", "utf8mb4_esperanto_ci", False),  # 241
+    ("utf8mb4", "utf8mb4_hungarian_ci", False),  # 242
+    ("utf8mb4", "utf8mb4_sinhala_ci", False),  # 243
+    ("utf8mb4", "utf8mb4_german2_ci", False),  # 244
+    ("utf8mb4", "utf8mb4_croatian_ci", False),  # 245
+    ("utf8mb4", "utf8mb4_unicode_520_ci", False),  # 246
+    ("utf8mb4", "utf8mb4_vietnamese_ci", False),  # 247
+    ("gb18030", "gb18030_chinese_ci", True),  # 248
+    ("gb18030", "gb18030_bin", False),  # 249
+    ("gb18030", "gb18030_unicode_520_ci", False),  # 250
+    None,
+    None,
+    None,
+    None,
+    ("utf8mb4", "utf8mb4_0900_ai_ci", True),  # 255
+    ("utf8mb4", "utf8mb4_de_pb_0900_ai_ci", False),  # 256
+    ("utf8mb4", "utf8mb4_is_0900_ai_ci", False),  # 257
+    ("utf8mb4", "utf8mb4_lv_0900_ai_ci", False),  # 258
+    ("utf8mb4", "utf8mb4_ro_0900_ai_ci", False),  # 259
+    ("utf8mb4", "utf8mb4_sl_0900_ai_ci", False),  # 260
+    ("utf8mb4", "utf8mb4_pl_0900_ai_ci", False),  # 261
+    ("utf8mb4", "utf8mb4_et_0900_ai_ci", False),  # 262
+    ("utf8mb4", "utf8mb4_es_0900_ai_ci", False),  # 263
+    ("utf8mb4", "utf8mb4_sv_0900_ai_ci", False),  # 264
+    ("utf8mb4", "utf8mb4_tr_0900_ai_ci", False),  # 265
+    ("utf8mb4", "utf8mb4_cs_0900_ai_ci", False),  # 266
+    ("utf8mb4", "utf8mb4_da_0900_ai_ci", False),  # 267
+    ("utf8mb4", "utf8mb4_lt_0900_ai_ci", False),  # 268
+    ("utf8mb4", "utf8mb4_sk_0900_ai_ci", False),  # 269
+    ("utf8mb4", "utf8mb4_es_trad_0900_ai_ci", False),  # 270
+    ("utf8mb4", "utf8mb4_la_0900_ai_ci", False),  # 271
+    None,
+    ("utf8mb4", "utf8mb4_eo_0900_ai_ci", False),  # 273
+    ("utf8mb4", "utf8mb4_hu_0900_ai_ci", False),  # 274
+    ("utf8mb4", "utf8mb4_hr_0900_ai_ci", False),  # 275
+    None,
+    ("utf8mb4", "utf8mb4_vi_0900_ai_ci", False),  # 277
+    ("utf8mb4", "utf8mb4_0900_as_cs", False),  # 278
+    ("utf8mb4", "utf8mb4_de_pb_0900_as_cs", False),  # 279
+    ("utf8mb4", "utf8mb4_is_0900_as_cs", False),  # 280
+    ("utf8mb4", "utf8mb4_lv_0900_as_cs", False),  # 281
+    ("utf8mb4", "utf8mb4_ro_0900_as_cs", False),  # 282
+    ("utf8mb4", "utf8mb4_sl_0900_as_cs", False),  # 283
+    ("utf8mb4", "utf8mb4_pl_0900_as_cs", False),  # 284
+    ("utf8mb4", "utf8mb4_et_0900_as_cs", False),  # 285
+    ("utf8mb4", "utf8mb4_es_0900_as_cs", False),  # 286
+    ("utf8mb4", "utf8mb4_sv_0900_as_cs", False),  # 287
+    ("utf8mb4", "utf8mb4_tr_0900_as_cs", False),  # 288
+    ("utf8mb4", "utf8mb4_cs_0900_as_cs", False),  # 289
+    ("utf8mb4", "utf8mb4_da_0900_as_cs", False),  # 290
+    ("utf8mb4", "utf8mb4_lt_0900_as_cs", False),  # 291
+    ("utf8mb4", "utf8mb4_sk_0900_as_cs", False),  # 292
+    ("utf8mb4", "utf8mb4_es_trad_0900_as_cs", False),  # 293
+    ("utf8mb4", "utf8mb4_la_0900_as_cs", False),  # 294
+    None,
+    ("utf8mb4", "utf8mb4_eo_0900_as_cs", False),  # 296
+    ("utf8mb4", "utf8mb4_hu_0900_as_cs", False),  # 297
+    ("utf8mb4", "utf8mb4_hr_0900_as_cs", False),  # 298
+    None,
+    ("utf8mb4", "utf8mb4_vi_0900_as_cs", False),  # 300
+    None,
+    None,
+    ("utf8mb4", "utf8mb4_ja_0900_as_cs", False),  # 303
+    ("utf8mb4", "utf8mb4_ja_0900_as_cs_ks", False),  # 304
+    ("utf8mb4", "utf8mb4_0900_as_ci", False),  # 305
+    ("utf8mb4", "utf8mb4_ru_0900_ai_ci", False),  # 306
+    ("utf8mb4", "utf8mb4_ru_0900_as_cs", False),  # 307
+    ("utf8mb4", "utf8mb4_zh_0900_as_cs", False),  # 308
+    ("utf8mb4", "utf8mb4_0900_bin", False),  # 309
+]
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/connection.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/connection.py
new file mode 100644
index 0000000..ab7eb37
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/connection.py
@@ -0,0 +1,1243 @@
+# Copyright (c) 2009, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementing communication with MySQL servers.
+"""
+
+from io import IOBase
+import logging
+import os
+import platform
+import socket
+import time
+
+from .authentication import get_auth_plugin
+from .catch23 import PY2, isstr, UNICODE_TYPES
+from .constants import (
+    ClientFlag, ServerCmd, ServerFlag,
+    flag_is_set, ShutdownType, NET_BUFFER_LENGTH
+)
+
+from . import errors, version
+from .conversion import MySQLConverter
+from .cursor import (
+    CursorBase, MySQLCursor, MySQLCursorRaw,
+    MySQLCursorBuffered, MySQLCursorBufferedRaw, MySQLCursorPrepared,
+    MySQLCursorDict, MySQLCursorBufferedDict, MySQLCursorNamedTuple,
+    MySQLCursorBufferedNamedTuple)
+from .network import MySQLUnixSocket, MySQLTCPSocket
+from .protocol import MySQLProtocol
+from .utils import int4store, linux_distribution
+from .abstracts import MySQLConnectionAbstract
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class MySQLConnection(MySQLConnectionAbstract):
+    """Connection to a MySQL Server"""
+    def __init__(self, *args, **kwargs):
+        self._protocol = None
+        self._socket = None
+        self._handshake = None
+        super(MySQLConnection, self).__init__(*args, **kwargs)
+
+        self._converter_class = MySQLConverter
+
+        self._client_flags = ClientFlag.get_default()
+        self._charset_id = 45
+        self._sql_mode = None
+        self._time_zone = None
+        self._autocommit = False
+
+        self._user = ''
+        self._password = ''
+        self._database = ''
+        self._host = '127.0.0.1'
+        self._port = 3306
+        self._unix_socket = None
+        self._client_host = ''
+        self._client_port = 0
+        self._ssl = {}
+        self._force_ipv6 = False
+
+        self._use_unicode = True
+        self._get_warnings = False
+        self._raise_on_warnings = False
+        self._buffered = False
+        self._unread_result = False
+        self._have_next_result = False
+        self._raw = False
+        self._in_transaction = False
+
+        self._prepared_statements = None
+
+        self._ssl_active = False
+        self._auth_plugin = None
+        self._pool_config_version = None
+
+        self._columns_desc = []
+
+        if kwargs:
+            try:
+                self.connect(**kwargs)
+            except:
+                # Tidy-up underlying socket on failure
+                self.close()
+                self._socket = None
+                raise
+
+    def _add_default_conn_attrs(self):
+        """Add the default connection attributes."""
+        if os.name == "nt":
+            if "64" in platform.architecture()[0]:
+                platform_arch = "x86_64"
+            elif "32" in platform.architecture()[0]:
+                platform_arch = "i386"
+            else:
+                platform_arch = platform.architecture()
+            os_ver = "Windows-{}".format(platform.win32_ver()[1])
+        else:
+            platform_arch = platform.machine()
+            if platform.system() == "Darwin":
+                os_ver = "{}-{}".format("macOS", platform.mac_ver()[0])
+            else:
+                os_ver = "-".join(linux_distribution()[0:2])
+
+        license_chunks = version.LICENSE.split(" ")
+        if license_chunks[0] == "GPLv2":
+            client_license = "GPL-2.0"
+        else:
+            client_license = "Commercial"
+        default_conn_attrs = {
+            "_pid": str(os.getpid()),
+            "_platform": platform_arch,
+            "_source_host": socket.gethostname(),
+            "_client_name": "mysql-connector-python",
+            "_client_license": client_license,
+            "_client_version": ".".join([str(x) for x in version.VERSION[0:3]]),
+            "_os": os_ver}
+
+        self._conn_attrs.update((default_conn_attrs))
+
+    def _do_handshake(self):
+        """Get the handshake from the MySQL server"""
+        packet = self._socket.recv()
+        if packet[4] == 255:
+            raise errors.get_exception(packet)
+
+        self._handshake = None
+        try:
+            handshake = self._protocol.parse_handshake(packet)
+        except Exception as err:
+            # pylint: disable=E1101
+            raise errors.get_mysql_exception(msg=err.msg, errno=err.errno,
+                                             sqlstate=err.sqlstate)
+
+        self._server_version = self._check_server_version(
+            handshake['server_version_original'])
+
+        if not handshake['capabilities'] & ClientFlag.SSL:
+            if self._auth_plugin == "mysql_clear_password":
+                err_msg = ("Clear password authentication is not supported "
+                           "over insecure channels")
+                raise errors.InterfaceError(err_msg)
+            if self._ssl.get('verify_cert'):
+                raise errors.InterfaceError("SSL is required but the server "
+                                            "doesn't support it", errno=2026)
+            self._client_flags &= ~ClientFlag.SSL
+        elif not self._ssl_disabled:
+            self._client_flags |= ClientFlag.SSL
+
+        if handshake['capabilities'] & ClientFlag.PLUGIN_AUTH:
+            self.set_client_flags([ClientFlag.PLUGIN_AUTH])
+
+        self._handshake = handshake
+
+    def _do_auth(self, username=None, password=None, database=None,
+                 client_flags=0, charset=45, ssl_options=None, conn_attrs=None):
+        """Authenticate with the MySQL server
+
+        Authentication happens in two parts. We first send a response to the
+        handshake. The MySQL server will then send either an AuthSwitchRequest
+        or an error packet.
+
+        Raises NotSupportedError when we get the old, insecure password
+        reply back. Raises any error coming from MySQL.
+        """
+        self._ssl_active = False
+        if client_flags & ClientFlag.SSL:
+            packet = self._protocol.make_auth_ssl(charset=charset,
+                                                  client_flags=client_flags)
+            self._socket.send(packet)
+            if ssl_options.get('tls_ciphersuites') is not None:
+                tls_ciphersuites = ":".join(ssl_options.get('tls_ciphersuites'))
+            else:
+                tls_ciphersuites = ""
+            self._socket.switch_to_ssl(ssl_options.get('ca'),
+                                       ssl_options.get('cert'),
+                                       ssl_options.get('key'),
+                                       ssl_options.get('verify_cert') or False,
+                                       ssl_options.get('verify_identity') or
+                                       False,
+                                       tls_ciphersuites,
+                                       ssl_options.get('tls_versions'))
+            self._ssl_active = True
+
+        packet = self._protocol.make_auth(
+            handshake=self._handshake,
+            username=username, password=password, database=database,
+            charset=charset, client_flags=client_flags,
+            ssl_enabled=self._ssl_active,
+            auth_plugin=self._auth_plugin,
+            conn_attrs=conn_attrs)
+        self._socket.send(packet)
+        self._auth_switch_request(username, password)
+
+        if not (client_flags & ClientFlag.CONNECT_WITH_DB) and database:
+            self.cmd_init_db(database)
+
+        return True
+
+    def _auth_switch_request(self, username=None, password=None):
+        """Handle second part of authentication
+
+        Raises NotSupportedError when we get the old, insecure password
+        reply back. Raises any error coming from MySQL.
+        """
+        auth = None
+        new_auth_plugin = self._auth_plugin or self._handshake["auth_plugin"]
+        _LOGGER.debug("new_auth_plugin: %s", new_auth_plugin)
+        packet = self._socket.recv()
+        if packet[4] == 254 and len(packet) == 5:
+            raise errors.NotSupportedError(
+                "Authentication with old (insecure) passwords "
+                "is not supported. For more information, lookup "
+                "Password Hashing in the latest MySQL manual")
+        elif packet[4] == 254:
+            # AuthSwitchRequest
+            (new_auth_plugin,
+             auth_data) = self._protocol.parse_auth_switch_request(packet)
+            auth = get_auth_plugin(new_auth_plugin)(auth_data,
+                 username=self._user, password=password,
+                 ssl_enabled=self._ssl_active)
+            response = auth.auth_response()
+            self._socket.send(response)
+            packet = self._socket.recv()
+
+            if packet[5] == 114 and packet[6] == 61: # 'r' and '='
+                # Continue with sasl authentication
+                dec_response = packet[5:].decode()
+                cresponse = auth.auth_continue(dec_response)
+                self._socket.send(cresponse)
+                packet = self._socket.recv()
+                if packet[5] == 118 and packet[6] == 61: # 'v' and '='
+                    if auth.auth_finalize(packet[5:]):
+                        # receive packed OK
+                        packet = self._socket.recv()
+
+        if packet[4] == 1:
+            auth_data = self._protocol.parse_auth_more_data(packet)
+            auth = get_auth_plugin(new_auth_plugin)(
+                auth_data, password=password, ssl_enabled=self._ssl_active)
+            if new_auth_plugin == "caching_sha2_password":
+                response = auth.auth_response()
+                if response:
+                    self._socket.send(response)
+                packet = self._socket.recv()
+
+        if packet[4] == 0:
+            return self._handle_ok(packet)
+        elif packet[4] == 255:
+            raise errors.get_exception(packet)
+        return None
+
+    def _get_connection(self, prtcls=None):
+        """Get connection based on configuration
+
+        This method will return the appropriated connection object using
+        the connection parameters.
+
+        Returns subclass of MySQLBaseSocket.
+        """
+        conn = None
+        if self.unix_socket and os.name != 'nt':
+            conn = MySQLUnixSocket(unix_socket=self.unix_socket)
+        else:
+            conn = MySQLTCPSocket(host=self.server_host,
+                                  port=self.server_port,
+                                  force_ipv6=self._force_ipv6)
+
+        conn.set_connection_timeout(self._connection_timeout)
+        return conn
+
+    def _open_connection(self):
+        """Open the connection to the MySQL server
+
+        This method sets up and opens the connection to the MySQL server.
+
+        Raises on errors.
+        """
+        self._protocol = MySQLProtocol()
+        self._socket = self._get_connection()
+        try:
+            self._socket.open_connection()
+            self._do_handshake()
+            self._do_auth(self._user, self._password,
+                          self._database, self._client_flags, self._charset_id,
+                          self._ssl, self._conn_attrs)
+            self.set_converter_class(self._converter_class)
+            if self._client_flags & ClientFlag.COMPRESS:
+                self._socket.recv = self._socket.recv_compressed
+                self._socket.send = self._socket.send_compressed
+            self._socket.set_connection_timeout(None)
+        except:
+            # close socket
+            self.close()
+            raise
+
+    def shutdown(self):
+        """Shut down connection to MySQL Server.
+        """
+        if not self._socket:
+            return
+
+        try:
+            self._socket.shutdown()
+        except (AttributeError, errors.Error):
+            pass  # Getting an exception would mean we are disconnected.
+
+    def close(self):
+        """Disconnect from the MySQL server"""
+        if not self._socket:
+            return
+
+        try:
+            self.cmd_quit()
+        except (AttributeError, errors.Error):
+            pass  # Getting an exception would mean we are disconnected.
+        self._socket.close_connection()
+
+    disconnect = close
+
+    def _send_cmd(self, command, argument=None, packet_number=0, packet=None,
+                  expect_response=True, compressed_packet_number=0):
+        """Send a command to the MySQL server
+
+        This method sends a command with an optional argument.
+        If packet is not None, it will be sent and the argument will be
+        ignored.
+
+        The packet_number is optional and should usually not be used.
+
+        Some commands might not result in the MySQL server returning
+        a response. If a command does not return anything, you should
+        set expect_response to False. The _send_cmd method will then
+        return None instead of a MySQL packet.
+
+        Returns a MySQL packet or None.
+        """
+        self.handle_unread_result()
+
+        try:
+            self._socket.send(
+                self._protocol.make_command(command, packet or argument),
+                packet_number, compressed_packet_number)
+        except AttributeError:
+            raise errors.OperationalError("MySQL Connection not available.")
+
+        if not expect_response:
+            return None
+        return self._socket.recv()
+
+    def _send_data(self, data_file, send_empty_packet=False):
+        """Send data to the MySQL server
+
+        This method accepts a file-like object and sends its data
+        as is to the MySQL server. If the send_empty_packet is
+        True, it will send an extra empty package (for example
+        when using LOAD LOCAL DATA INFILE).
+
+        Returns a MySQL packet.
+        """
+        self.handle_unread_result()
+
+        if not hasattr(data_file, 'read'):
+            raise ValueError("expecting a file-like object")
+
+        try:
+            buf = data_file.read(NET_BUFFER_LENGTH - 16)
+            while buf:
+                self._socket.send(buf)
+                buf = data_file.read(NET_BUFFER_LENGTH - 16)
+        except AttributeError:
+            raise errors.OperationalError("MySQL Connection not available.")
+
+        if send_empty_packet:
+            try:
+                self._socket.send(b'')
+            except AttributeError:
+                raise errors.OperationalError(
+                    "MySQL Connection not available.")
+
+        return self._socket.recv()
+
+    def _handle_server_status(self, flags):
+        """Handle the server flags found in MySQL packets
+
+        This method handles the server flags send by MySQL OK and EOF
+        packets. It, for example, checks whether there exists more result
+        sets or whether there is an ongoing transaction.
+        """
+        self._have_next_result = flag_is_set(ServerFlag.MORE_RESULTS_EXISTS,
+                                             flags)
+        self._in_transaction = flag_is_set(ServerFlag.STATUS_IN_TRANS, flags)
+
+    @property
+    def in_transaction(self):
+        """MySQL session has started a transaction"""
+        return self._in_transaction
+
+    def _handle_ok(self, packet):
+        """Handle a MySQL OK packet
+
+        This method handles a MySQL OK packet. When the packet is found to
+        be an Error packet, an error will be raised. If the packet is neither
+        an OK or an Error packet, errors.InterfaceError will be raised.
+
+        Returns a dict()
+        """
+        if packet[4] == 0:
+            ok_pkt = self._protocol.parse_ok(packet)
+            self._handle_server_status(ok_pkt['status_flag'])
+            return ok_pkt
+        elif packet[4] == 255:
+            raise errors.get_exception(packet)
+        raise errors.InterfaceError('Expected OK packet')
+
+    def _handle_eof(self, packet):
+        """Handle a MySQL EOF packet
+
+        This method handles a MySQL EOF packet. When the packet is found to
+        be an Error packet, an error will be raised. If the packet is neither
+        and OK or an Error packet, errors.InterfaceError will be raised.
+
+        Returns a dict()
+        """
+        if packet[4] == 254:
+            eof = self._protocol.parse_eof(packet)
+            self._handle_server_status(eof['status_flag'])
+            return eof
+        elif packet[4] == 255:
+            raise errors.get_exception(packet)
+        raise errors.InterfaceError('Expected EOF packet')
+
+    def _handle_load_data_infile(self, filename):
+        """Handle a LOAD DATA INFILE LOCAL request"""
+        file_name = os.path.abspath(filename)
+        if os.path.islink(file_name):
+            raise errors.OperationalError("Use of symbolic link is not allowed")
+        if not self._allow_local_infile and \
+           not self._allow_local_infile_in_path:
+            raise errors.DatabaseError(
+                "LOAD DATA LOCAL INFILE file request rejected due to "
+                "restrictions on access.")
+        if not self._allow_local_infile and self._allow_local_infile_in_path:
+            # validate filename is inside of allow_local_infile_in_path path.
+            infile_path = os.path.abspath(self._allow_local_infile_in_path)
+            c_path = None
+            try:
+                if PY2:
+                    c_path = os.path.commonprefix([infile_path, file_name])
+                    if not os.path.exists(c_path):
+                        raise ValueError("Can't locate path")
+                else:
+                    c_path = os.path.commonpath([infile_path, file_name])
+            except ValueError as err:
+                err_msg = ("{} while loading file `{}` and path `{}` given"
+                           " in allow_local_infile_in_path")
+                raise errors.InterfaceError(
+                    err_msg.format(str(err), file_name, infile_path))
+
+            if c_path != infile_path:
+                err_msg = ("The file `{}` is not found in the given "
+                           "allow_local_infile_in_path {}")
+                raise errors.DatabaseError(
+                    err_msg.format(file_name,infile_path))
+
+        try:
+            data_file = open(file_name, 'rb')
+            return self._handle_ok(self._send_data(data_file,
+                                                   send_empty_packet=True))
+        except IOError:
+            # Send a empty packet to cancel the operation
+            try:
+                self._socket.send(b'')
+            except AttributeError:
+                raise errors.OperationalError(
+                    "MySQL Connection not available.")
+            raise errors.InterfaceError(
+                "File '{0}' could not be read".format(file_name))
+        finally:
+            try:
+                data_file.close()
+            except (IOError, NameError):
+                pass
+
+    def _handle_result(self, packet):
+        """Handle a MySQL Result
+
+        This method handles a MySQL result, for example, after sending the
+        query command. OK and EOF packets will be handled and returned. If
+        the packet is an Error packet, an errors.Error-exception will be
+        raised.
+
+        The dictionary returned of:
+        - columns: column information
+        - eof: the EOF-packet information
+
+        Returns a dict()
+        """
+        if not packet or len(packet) < 4:
+            raise errors.InterfaceError('Empty response')
+        elif packet[4] == 0:
+            return self._handle_ok(packet)
+        elif packet[4] == 251:
+            if PY2:
+                filename = str(packet[5:])
+            else:
+                filename = packet[5:].decode()
+            return self._handle_load_data_infile(filename)
+        elif packet[4] == 254:
+            return self._handle_eof(packet)
+        elif packet[4] == 255:
+            raise errors.get_exception(packet)
+
+        # We have a text result set
+        column_count = self._protocol.parse_column_count(packet)
+        if not column_count or not isinstance(column_count, int):
+            raise errors.InterfaceError('Illegal result set.')
+
+        self._columns_desc = [None,] * column_count
+        for i in range(0, column_count):
+            self._columns_desc[i] = self._protocol.parse_column(
+                self._socket.recv(), self.python_charset)
+
+        eof = self._handle_eof(self._socket.recv())
+        self.unread_result = True
+        return {'columns': self._columns_desc, 'eof': eof}
+
+    def get_row(self, binary=False, columns=None, raw=None):
+        """Get the next rows returned by the MySQL server
+
+        This method gets one row from the result set after sending, for
+        example, the query command. The result is a tuple consisting of the
+        row and the EOF packet.
+        If no row was available in the result set, the row data will be None.
+
+        Returns a tuple.
+        """
+        (rows, eof) = self.get_rows(count=1, binary=binary, columns=columns,
+                                    raw=raw)
+        if rows:
+            return (rows[0], eof)
+        return (None, eof)
+
+    def get_rows(self, count=None, binary=False, columns=None, raw=None,
+                 prep_stmt=None):
+        """Get all rows returned by the MySQL server
+
+        This method gets all rows returned by the MySQL server after sending,
+        for example, the query command. The result is a tuple consisting of
+        a list of rows and the EOF packet.
+
+        Returns a tuple()
+        """
+        if raw is None:
+            raw = self._raw
+
+        if not self.unread_result:
+            raise errors.InternalError("No result set available.")
+
+        try:
+            if binary:
+                charset = self.charset
+                if charset == 'utf8mb4':
+                    charset = 'utf8'
+                rows = self._protocol.read_binary_result(
+                    self._socket, columns, count, charset)
+            else:
+                rows = self._protocol.read_text_result(self._socket,
+                                                       self._server_version,
+                                                       count=count)
+        except errors.Error as err:
+            self.unread_result = False
+            raise err
+
+        rows, eof_p = rows
+
+        if not (binary or raw) and self._columns_desc is not None and rows \
+           and hasattr(self, 'converter'):
+            row_to_python = self.converter.row_to_python
+            rows = [row_to_python(row, self._columns_desc) for row in rows]
+
+        if eof_p is not None:
+            self._handle_server_status(eof_p['status_flag'] if 'status_flag' in
+                                       eof_p else eof_p['server_status'])
+            self.unread_result = False
+
+        return rows, eof_p
+
+    def consume_results(self):
+        """Consume results
+        """
+        if self.unread_result:
+            self.get_rows()
+
+    def cmd_init_db(self, database):
+        """Change the current database
+
+        This method changes the current (default) database by sending the
+        INIT_DB command. The result is a dictionary containing the OK packet
+        information.
+
+        Returns a dict()
+        """
+        return self._handle_ok(
+            self._send_cmd(ServerCmd.INIT_DB, database.encode('utf-8')))
+
+    def cmd_query(self, query, raw=False, buffered=False, raw_as_string=False):
+        """Send a query to the MySQL server
+
+        This method send the query to the MySQL server and returns the result.
+
+        If there was a text result, a tuple will be returned consisting of
+        the number of columns and a list containing information about these
+        columns.
+
+        When the query doesn't return a text result, the OK or EOF packet
+        information as dictionary will be returned. In case the result was
+        an error, exception errors.Error will be raised.
+
+        Returns a tuple()
+        """
+        if not isinstance(query, bytes):
+            query = query.encode('utf-8')
+        try:
+            result = self._handle_result(self._send_cmd(ServerCmd.QUERY, query))
+        except errors.ProgrammingError as err:
+            if err.errno == 3948 and \
+               "Loading local data is disabled" in err.msg:
+                err_msg = ("LOAD DATA LOCAL INFILE file request rejected due "
+                           "to restrictions on access.")
+                raise errors.DatabaseError(err_msg)
+            raise
+        if self._have_next_result:
+            raise errors.InterfaceError(
+                'Use cmd_query_iter for statements with multiple queries.')
+
+        return result
+
+    def cmd_query_iter(self, statements):
+        """Send one or more statements to the MySQL server
+
+        Similar to the cmd_query method, but instead returns a generator
+        object to iterate through results. It sends the statements to the
+        MySQL server and through the iterator you can get the results.
+
+        statement = 'SELECT 1; INSERT INTO t1 VALUES (); SELECT 2'
+        for result in cnx.cmd_query(statement, iterate=True):
+            if 'columns' in result:
+                columns = result['columns']
+                rows = cnx.get_rows()
+            else:
+                # do something useful with INSERT result
+
+        Returns a generator.
+        """
+        if not isinstance(statements, bytearray):
+            if isstr(statements) and isinstance(statements, UNICODE_TYPES):
+                statements = statements.encode('utf8')
+            statements = bytearray(statements)
+
+        # Handle the first query result
+        yield self._handle_result(self._send_cmd(ServerCmd.QUERY, statements))
+
+        # Handle next results, if any
+        while self._have_next_result:
+            self.handle_unread_result()
+            yield self._handle_result(self._socket.recv())
+
+    def cmd_refresh(self, options):
+        """Send the Refresh command to the MySQL server
+
+        This method sends the Refresh command to the MySQL server. The options
+        argument should be a bitwise value using constants.RefreshOption.
+        Usage example:
+         RefreshOption = mysql.connector.RefreshOption
+         refresh = RefreshOption.LOG | RefreshOption.THREADS
+         cnx.cmd_refresh(refresh)
+
+        The result is a dictionary with the OK packet information.
+
+        Returns a dict()
+        """
+        return self._handle_ok(
+            self._send_cmd(ServerCmd.REFRESH, int4store(options)))
+
+    def cmd_quit(self):
+        """Close the current connection with the server
+
+        This method sends the QUIT command to the MySQL server, closing the
+        current connection. Since the no response can be returned to the
+        client, cmd_quit() will return the packet it send.
+
+        Returns a str()
+        """
+        self.handle_unread_result()
+
+        packet = self._protocol.make_command(ServerCmd.QUIT)
+        self._socket.send(packet, 0, 0)
+        return packet
+
+    def cmd_shutdown(self, shutdown_type=None):
+        """Shut down the MySQL Server
+
+        This method sends the SHUTDOWN command to the MySQL server and is only
+        possible if the current user has SUPER privileges. The result is a
+        dictionary containing the OK packet information.
+
+        Note: Most applications and scripts do not the SUPER privilege.
+
+        Returns a dict()
+        """
+        if shutdown_type:
+            if not ShutdownType.get_info(shutdown_type):
+                raise errors.InterfaceError("Invalid shutdown type")
+            atype = shutdown_type
+        else:
+            atype = ShutdownType.SHUTDOWN_DEFAULT
+        return self._handle_eof(self._send_cmd(ServerCmd.SHUTDOWN,
+                                               int4store(atype)))
+
+    def cmd_statistics(self):
+        """Send the statistics command to the MySQL Server
+
+        This method sends the STATISTICS command to the MySQL server. The
+        result is a dictionary with various statistical information.
+
+        Returns a dict()
+        """
+        self.handle_unread_result()
+
+        packet = self._protocol.make_command(ServerCmd.STATISTICS)
+        self._socket.send(packet, 0, 0)
+        return self._protocol.parse_statistics(self._socket.recv())
+
+    def cmd_process_kill(self, mysql_pid):
+        """Kill a MySQL process
+
+        This method send the PROCESS_KILL command to the server along with
+        the process ID. The result is a dictionary with the OK packet
+        information.
+
+        Returns a dict()
+        """
+        return self._handle_ok(
+            self._send_cmd(ServerCmd.PROCESS_KILL, int4store(mysql_pid)))
+
+    def cmd_debug(self):
+        """Send the DEBUG command
+
+        This method sends the DEBUG command to the MySQL server, which
+        requires the MySQL user to have SUPER privilege. The output will go
+        to the MySQL server error log and the result of this method is a
+        dictionary with EOF packet information.
+
+        Returns a dict()
+        """
+        return self._handle_eof(self._send_cmd(ServerCmd.DEBUG))
+
+    def cmd_ping(self):
+        """Send the PING command
+
+        This method sends the PING command to the MySQL server. It is used to
+        check if the the connection is still valid. The result of this
+        method is dictionary with OK packet information.
+
+        Returns a dict()
+        """
+        return self._handle_ok(self._send_cmd(ServerCmd.PING))
+
+    def cmd_change_user(self, username='', password='', database='',
+                        charset=45):
+        """Change the current logged in user
+
+        This method allows to change the current logged in user information.
+        The result is a dictionary with OK packet information.
+
+        Returns a dict()
+        """
+        self.handle_unread_result()
+
+        if self._compress:
+            raise errors.NotSupportedError("Change user is not supported with "
+                                           "compression.")
+
+        packet = self._protocol.make_change_user(
+            handshake=self._handshake,
+            username=username, password=password, database=database,
+            charset=charset, client_flags=self._client_flags,
+            ssl_enabled=self._ssl_active,
+            auth_plugin=self._auth_plugin)
+        self._socket.send(packet, 0, 0)
+
+        ok_packet = self._auth_switch_request(username, password)
+
+        try:
+            if not (self._client_flags & ClientFlag.CONNECT_WITH_DB) \
+                    and database:
+                self.cmd_init_db(database)
+        except:
+            raise
+
+        self._charset_id = charset
+        self._post_connection()
+
+        return ok_packet
+
+    @property
+    def database(self):
+        """Get the current database"""
+        return self.info_query("SELECT DATABASE()")[0]
+
+    @database.setter
+    def database(self, value):  # pylint: disable=W0221
+        """Set the current database"""
+        self.cmd_query("USE %s" % value)
+
+    def is_connected(self):
+        """Reports whether the connection to MySQL Server is available
+
+        This method checks whether the connection to MySQL is available.
+        It is similar to ping(), but unlike the ping()-method, either True
+        or False is returned and no exception is raised.
+
+        Returns True or False.
+        """
+        try:
+            self.cmd_ping()
+        except:
+            return False  # This method does not raise
+        return True
+
+    def set_allow_local_infile_in_path(self, path):
+        """set local_infile_in_path
+
+        Set allow_local_infile_in_path.
+        """
+        self._allow_local_infile_in_path = path
+
+    def reset_session(self, user_variables=None, session_variables=None):
+        """Clears the current active session
+
+        This method resets the session state, if the MySQL server is 5.7.3
+        or later active session will be reset without re-authenticating.
+        For other server versions session will be reset by re-authenticating.
+
+        It is possible to provide a sequence of variables and their values to
+        be set after clearing the session. This is possible for both user
+        defined variables and session variables.
+        This method takes two arguments user_variables and session_variables
+        which are dictionaries.
+
+        Raises OperationalError if not connected, InternalError if there are
+        unread results and InterfaceError on errors.
+        """
+        if not self.is_connected():
+            raise errors.OperationalError("MySQL Connection not available.")
+
+        try:
+            self.cmd_reset_connection()
+        except errors.NotSupportedError:
+            self.cmd_change_user(self._user, self._password,
+                                 self._database, self._charset_id)
+
+        cur = self.cursor()
+        if user_variables:
+            for key, value in user_variables.items():
+                cur.execute("SET @`{0}` = %s".format(key), (value,))
+        if session_variables:
+            for key, value in session_variables.items():
+                cur.execute("SET SESSION `{0}` = %s".format(key), (value,))
+
+    def reconnect(self, attempts=1, delay=0):
+        """Attempt to reconnect to the MySQL server
+
+        The argument attempts should be the number of times a reconnect
+        is tried. The delay argument is the number of seconds to wait between
+        each retry.
+
+        You may want to set the number of attempts higher and use delay when
+        you expect the MySQL server to be down for maintenance or when you
+        expect the network to be temporary unavailable.
+
+        Raises InterfaceError on errors.
+        """
+        counter = 0
+        while counter != attempts:
+            counter = counter + 1
+            try:
+                self.disconnect()
+                self.connect()
+                if self.is_connected():
+                    break
+            except Exception as err:  # pylint: disable=W0703
+                if counter == attempts:
+                    msg = "Can not reconnect to MySQL after {0} "\
+                          "attempt(s): {1}".format(attempts, str(err))
+                    raise errors.InterfaceError(msg)
+            if delay > 0:
+                time.sleep(delay)
+
+    def ping(self, reconnect=False, attempts=1, delay=0):
+        """Check availability of the MySQL server
+
+        When reconnect is set to True, one or more attempts are made to try
+        to reconnect to the MySQL server using the reconnect()-method.
+
+        delay is the number of seconds to wait between each retry.
+
+        When the connection is not available, an InterfaceError is raised. Use
+        the is_connected()-method if you just want to check the connection
+        without raising an error.
+
+        Raises InterfaceError on errors.
+        """
+        try:
+            self.cmd_ping()
+        except:
+            if reconnect:
+                self.reconnect(attempts=attempts, delay=delay)
+            else:
+                raise errors.InterfaceError("Connection to MySQL is"
+                                            " not available.")
+
+    @property
+    def connection_id(self):
+        """MySQL connection ID"""
+        try:
+            return self._handshake['server_threadid']
+        except KeyError:
+            return None
+
+    def cursor(self, buffered=None, raw=None, prepared=None, cursor_class=None,
+               dictionary=None, named_tuple=None):
+        """Instantiates and returns a cursor
+
+        By default, MySQLCursor is returned. Depending on the options
+        while connecting, a buffered and/or raw cursor is instantiated
+        instead. Also depending upon the cursor options, rows can be
+        returned as dictionary or named tuple.
+
+        Dictionary and namedtuple based cursors are available with buffered
+        output but not raw.
+
+        It is possible to also give a custom cursor through the
+        cursor_class parameter, but it needs to be a subclass of
+        mysql.connector.cursor.CursorBase.
+
+        Raises ProgrammingError when cursor_class is not a subclass of
+        CursorBase. Raises ValueError when cursor is not available.
+
+        Returns a cursor-object
+        """
+        self.handle_unread_result()
+
+        if not self.is_connected():
+            raise errors.OperationalError("MySQL Connection not available.")
+        if cursor_class is not None:
+            if not issubclass(cursor_class, CursorBase):
+                raise errors.ProgrammingError(
+                    "Cursor class needs be to subclass of cursor.CursorBase")
+            return (cursor_class)(self)
+
+        buffered = buffered if buffered is not None else self._buffered
+        raw = raw if raw is not None else self._raw
+
+        cursor_type = 0
+        if buffered is True:
+            cursor_type |= 1
+        if raw is True:
+            cursor_type |= 2
+        if dictionary is True:
+            cursor_type |= 4
+        if named_tuple is True:
+            cursor_type |= 8
+        if prepared is True:
+            cursor_type |= 16
+
+        types = {
+            0: MySQLCursor,  # 0
+            1: MySQLCursorBuffered,
+            2: MySQLCursorRaw,
+            3: MySQLCursorBufferedRaw,
+            4: MySQLCursorDict,
+            5: MySQLCursorBufferedDict,
+            8: MySQLCursorNamedTuple,
+            9: MySQLCursorBufferedNamedTuple,
+            16: MySQLCursorPrepared
+        }
+        try:
+            return (types[cursor_type])(self)
+        except KeyError:
+            args = ('buffered', 'raw', 'dictionary', 'named_tuple', 'prepared')
+            raise ValueError('Cursor not available with given criteria: ' +
+                             ', '.join([args[i] for i in range(5)
+                                        if cursor_type & (1 << i) != 0]))
+
+    def commit(self):
+        """Commit current transaction"""
+        self._execute_query("COMMIT")
+
+    def rollback(self):
+        """Rollback current transaction"""
+        if self.unread_result:
+            self.get_rows()
+
+        self._execute_query("ROLLBACK")
+
+    def _execute_query(self, query):
+        """Execute a query
+
+        This method simply calls cmd_query() after checking for unread
+        result. If there are still unread result, an errors.InterfaceError
+        is raised. Otherwise whatever cmd_query() returns is returned.
+
+        Returns a dict()
+        """
+        self.handle_unread_result()
+        self.cmd_query(query)
+
+    def info_query(self, query):
+        """Send a query which only returns 1 row"""
+        cursor = self.cursor(buffered=True)
+        cursor.execute(query)
+        return cursor.fetchone()
+
+    def _handle_binary_ok(self, packet):
+        """Handle a MySQL Binary Protocol OK packet
+
+        This method handles a MySQL Binary Protocol OK packet. When the
+        packet is found to be an Error packet, an error will be raised. If
+        the packet is neither an OK or an Error packet, errors.InterfaceError
+        will be raised.
+
+        Returns a dict()
+        """
+        if packet[4] == 0:
+            return self._protocol.parse_binary_prepare_ok(packet)
+        elif packet[4] == 255:
+            raise errors.get_exception(packet)
+        raise errors.InterfaceError('Expected Binary OK packet')
+
+    def _handle_binary_result(self, packet):
+        """Handle a MySQL Result
+
+        This method handles a MySQL result, for example, after sending the
+        query command. OK and EOF packets will be handled and returned. If
+        the packet is an Error packet, an errors.Error-exception will be
+        raised.
+
+        The tuple returned by this method consist of:
+        - the number of columns in the result,
+        - a list of tuples with information about the columns,
+        - the EOF packet information as a dictionary.
+
+        Returns tuple() or dict()
+        """
+        if not packet or len(packet) < 4:
+            raise errors.InterfaceError('Empty response')
+        elif packet[4] == 0:
+            return self._handle_ok(packet)
+        elif packet[4] == 254:
+            return self._handle_eof(packet)
+        elif packet[4] == 255:
+            raise errors.get_exception(packet)
+
+        # We have a binary result set
+        column_count = self._protocol.parse_column_count(packet)
+        if not column_count or not isinstance(column_count, int):
+            raise errors.InterfaceError('Illegal result set.')
+
+        columns = [None] * column_count
+        for i in range(0, column_count):
+            columns[i] = self._protocol.parse_column(
+                self._socket.recv(), self.python_charset)
+
+        eof = self._handle_eof(self._socket.recv())
+        return (column_count, columns, eof)
+
+    def cmd_stmt_fetch(self, statement_id, rows=1):
+        """Fetch a MySQL statement Result Set
+
+        This method will send the FETCH command to MySQL together with the
+        given statement id and the number of rows to fetch.
+        """
+        packet = self._protocol.make_stmt_fetch(statement_id, rows)
+        self.unread_result = False
+        self._send_cmd(ServerCmd.STMT_FETCH, packet, expect_response=False)
+        self.unread_result = True
+
+    def cmd_stmt_prepare(self, statement):
+        """Prepare a MySQL statement
+
+        This method will send the PREPARE command to MySQL together with the
+        given statement.
+
+        Returns a dict()
+        """
+        packet = self._send_cmd(ServerCmd.STMT_PREPARE, statement)
+        result = self._handle_binary_ok(packet)
+
+        result['columns'] = []
+        result['parameters'] = []
+        if result['num_params'] > 0:
+            for _ in range(0, result['num_params']):
+                result['parameters'].append(
+                    self._protocol.parse_column(self._socket.recv(),
+                                                self.python_charset))
+            self._handle_eof(self._socket.recv())
+        if result['num_columns'] > 0:
+            for _ in range(0, result['num_columns']):
+                result['columns'].append(
+                    self._protocol.parse_column(self._socket.recv(),
+                                                self.python_charset))
+            self._handle_eof(self._socket.recv())
+
+        return result
+
+    def cmd_stmt_execute(self, statement_id, data=(), parameters=(), flags=0):
+        """Execute a prepared MySQL statement"""
+        parameters = list(parameters)
+        long_data_used = {}
+
+        if data:
+            for param_id, _ in enumerate(parameters):
+                if isinstance(data[param_id], IOBase):
+                    binary = True
+                    try:
+                        binary = 'b' not in data[param_id].mode
+                    except AttributeError:
+                        pass
+                    self.cmd_stmt_send_long_data(statement_id, param_id,
+                                                 data[param_id])
+                    long_data_used[param_id] = (binary,)
+
+        execute_packet = self._protocol.make_stmt_execute(
+            statement_id, data, tuple(parameters), flags,
+            long_data_used, self.charset)
+        packet = self._send_cmd(ServerCmd.STMT_EXECUTE, packet=execute_packet)
+        result = self._handle_binary_result(packet)
+        return result
+
+    def cmd_stmt_close(self, statement_id):
+        """Deallocate a prepared MySQL statement
+
+        This method deallocates the prepared statement using the
+        statement_id. Note that the MySQL server does not return
+        anything.
+        """
+        self._send_cmd(ServerCmd.STMT_CLOSE, int4store(statement_id),
+                       expect_response=False)
+
+    def cmd_stmt_send_long_data(self, statement_id, param_id, data):
+        """Send data for a column
+
+        This methods send data for a column (for example BLOB) for statement
+        identified by statement_id. The param_id indicate which parameter
+        the data belongs too.
+        The data argument should be a file-like object.
+
+        Since MySQL does not send anything back, no error is raised. When
+        the MySQL server is not reachable, an OperationalError is raised.
+
+        cmd_stmt_send_long_data should be called before cmd_stmt_execute.
+
+        The total bytes send is returned.
+
+        Returns int.
+        """
+        chunk_size = 8192
+        total_sent = 0
+        # pylint: disable=W0212
+        prepare_packet = self._protocol._prepare_stmt_send_long_data
+        # pylint: enable=W0212
+        try:
+            buf = data.read(chunk_size)
+            while buf:
+                packet = prepare_packet(statement_id, param_id, buf)
+                self._send_cmd(ServerCmd.STMT_SEND_LONG_DATA, packet=packet,
+                               expect_response=False)
+                total_sent += len(buf)
+                buf = data.read(chunk_size)
+        except AttributeError:
+            raise errors.OperationalError("MySQL Connection not available.")
+
+        return total_sent
+
+    def cmd_stmt_reset(self, statement_id):
+        """Reset data for prepared statement sent as long data
+
+        The result is a dictionary with OK packet information.
+
+        Returns a dict()
+        """
+        self._handle_ok(self._send_cmd(ServerCmd.STMT_RESET,
+                                       int4store(statement_id)))
+
+    def cmd_reset_connection(self):
+        """Resets the session state without re-authenticating
+
+        Works only for MySQL server 5.7.3 or later.
+        The result is a dictionary with OK packet information.
+
+        Returns a dict()
+        """
+        if self._server_version < (5, 7, 3):
+            raise errors.NotSupportedError("MySQL version 5.7.2 and "
+                                           "earlier does not support "
+                                           "COM_RESET_CONNECTION.")
+        self._handle_ok(self._send_cmd(ServerCmd.RESET_CONNECTION))
+        self._post_connection()
+
+    def handle_unread_result(self):
+        """Check whether there is an unread result"""
+        if self.can_consume_results:
+            self.consume_results()
+        elif self.unread_result:
+            raise errors.InternalError("Unread result found")
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/connection_cext.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/connection_cext.py
new file mode 100644
index 0000000..c985ca7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/connection_cext.py
@@ -0,0 +1,790 @@
+# Copyright (c) 2014, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Connection class using the C Extension
+"""
+
+# Detection of abstract methods in pylint is not working correctly
+#pylint: disable=W0223
+
+import os
+import socket
+import sysconfig
+
+from . import errors, version
+from .catch23 import INT_TYPES
+from .constants import (
+    CharacterSet, FieldFlag, ServerFlag, ShutdownType, ClientFlag
+)
+from .abstracts import MySQLConnectionAbstract, MySQLCursorAbstract
+from .protocol import MySQLProtocol
+
+HAVE_CMYSQL = False
+# pylint: disable=F0401,C0413
+try:
+    import _mysql_connector
+    from .cursor_cext import (
+        CMySQLCursor, CMySQLCursorRaw,
+        CMySQLCursorBuffered, CMySQLCursorBufferedRaw, CMySQLCursorPrepared,
+        CMySQLCursorDict, CMySQLCursorBufferedDict, CMySQLCursorNamedTuple,
+        CMySQLCursorBufferedNamedTuple)
+    from _mysql_connector import MySQLInterfaceError  # pylint: disable=F0401
+except ImportError as exc:
+    raise ImportError(
+        "MySQL Connector/Python C Extension not available ({0})".format(
+            str(exc)
+        ))
+else:
+    HAVE_CMYSQL = True
+# pylint: enable=F0401,C0413
+
+
+class CMySQLConnection(MySQLConnectionAbstract):
+
+    """Class initiating a MySQL Connection using Connector/C"""
+
+    def __init__(self, **kwargs):
+        """Initialization"""
+        if not HAVE_CMYSQL:
+            raise RuntimeError(
+                "MySQL Connector/Python C Extension not available")
+        self._cmysql = None
+        self._columns = []
+        self._plugin_dir = os.path.join(
+            os.path.dirname(os.path.abspath(_mysql_connector.__file__)),
+            "mysql", "vendor"
+        )
+        self.converter = None
+        super(CMySQLConnection, self).__init__(**kwargs)
+
+        if kwargs:
+            self.connect(**kwargs)
+
+    def _add_default_conn_attrs(self):
+        """Add default connection attributes"""
+        license_chunks = version.LICENSE.split(" ")
+        if license_chunks[0] == "GPLv2":
+            client_license = "GPL-2.0"
+        else:
+            client_license = "Commercial"
+
+        self._conn_attrs.update({
+            "_connector_name": "mysql-connector-python",
+            "_connector_license": client_license,
+            "_connector_version": ".".join(
+                [str(x) for x in version.VERSION[0:3]]),
+            "_source_host": socket.gethostname()
+            })
+
+    def _do_handshake(self):
+        """Gather information of the MySQL server before authentication"""
+        self._handshake = {
+            'protocol': self._cmysql.get_proto_info(),
+            'server_version_original': self._cmysql.get_server_info(),
+            'server_threadid': self._cmysql.thread_id(),
+            'charset': None,
+            'server_status': None,
+            'auth_plugin': None,
+            'auth_data': None,
+            'capabilities': self._cmysql.st_server_capabilities(),
+        }
+
+        self._server_version = self._check_server_version(
+            self._handshake['server_version_original']
+        )
+
+    @property
+    def _server_status(self):
+        """Returns the server status attribute of MYSQL structure"""
+        return self._cmysql.st_server_status()
+
+    def set_allow_local_infile_in_path(self, path):
+        """set local_infile_in_path
+
+        Set allow_local_infile_in_path.
+        """
+
+        if self._cmysql:
+            self._cmysql.set_load_data_local_infile_option(path)
+
+    def set_unicode(self, value=True):
+        """Toggle unicode mode
+
+        Set whether we return string fields as unicode or not.
+        Default is True.
+        """
+        self._use_unicode = value
+        if self._cmysql:
+            self._cmysql.use_unicode(value)
+        if self.converter:
+            self.converter.set_unicode(value)
+
+    @property
+    def autocommit(self):
+        """Get whether autocommit is on or off"""
+        value = self.info_query("SELECT @@session.autocommit")[0]
+        return True if value == 1 else False
+
+    @autocommit.setter
+    def autocommit(self, value):  # pylint: disable=W0221
+        """Toggle autocommit"""
+        try:
+            self._cmysql.autocommit(value)
+            self._autocommit = value
+        except MySQLInterfaceError as exc:
+            raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                             sqlstate=exc.sqlstate)
+
+    @property
+    def database(self):
+        """Get the current database"""
+        return self.info_query("SELECT DATABASE()")[0]
+
+    @database.setter
+    def database(self, value):  # pylint: disable=W0221
+        """Set the current database"""
+        self._cmysql.select_db(value)
+
+    @property
+    def in_transaction(self):
+        """MySQL session has started a transaction"""
+        return self._server_status & ServerFlag.STATUS_IN_TRANS
+
+    def _open_connection(self):
+        charset_name = CharacterSet.get_info(self._charset_id)[0]
+        self._cmysql = _mysql_connector.MySQL(  # pylint: disable=E1101,I1101
+            buffered=self._buffered,
+            raw=self._raw,
+            charset_name=charset_name,
+            connection_timeout=(self._connection_timeout or 0),
+            use_unicode=self._use_unicode,
+            auth_plugin=self._auth_plugin,
+            plugin_dir=self._plugin_dir)
+        if not self.isset_client_flag(ClientFlag.CONNECT_ARGS):
+            self._conn_attrs = {}
+        cnx_kwargs = {
+            'host': self._host,
+            'user': self._user,
+            'password': self._password,
+            'database': self._database,
+            'port': self._port,
+            'client_flags': self._client_flags,
+            'unix_socket': self._unix_socket,
+            'compress': self.isset_client_flag(ClientFlag.COMPRESS),
+            'ssl_disabled': True,
+            "conn_attrs": self._conn_attrs,
+            "local_infile": self._allow_local_infile,
+            "load_data_local_dir": self._allow_local_infile_in_path
+        }
+
+        tls_versions = self._ssl.get('tls_versions')
+        if tls_versions is not None:
+            tls_versions.sort(reverse=True)
+            tls_versions = ",".join(tls_versions)
+        if self._ssl.get('tls_ciphersuites') is not None:
+            ssl_ciphersuites = self._ssl.get('tls_ciphersuites')[0]
+            tls_ciphersuites = self._ssl.get('tls_ciphersuites')[1]
+        else:
+            ssl_ciphersuites = None
+            tls_ciphersuites = None
+        if tls_versions is not None and "TLSv1.3" in tls_versions and \
+           not tls_ciphersuites:
+            tls_ciphersuites = "TLS_AES_256_GCM_SHA384"
+        if not self._ssl_disabled:
+            cnx_kwargs.update({
+                'ssl_ca': self._ssl.get('ca'),
+                'ssl_cert': self._ssl.get('cert'),
+                'ssl_key': self._ssl.get('key'),
+                'ssl_cipher_suites': ssl_ciphersuites,
+                'tls_versions': tls_versions,
+                'tls_cipher_suites': tls_ciphersuites,
+                'ssl_verify_cert': self._ssl.get('verify_cert') or False,
+                'ssl_verify_identity':
+                    self._ssl.get('verify_identity') or False,
+                'ssl_disabled': self._ssl_disabled
+            })
+
+        try:
+            self._cmysql.connect(**cnx_kwargs)
+        except MySQLInterfaceError as exc:
+            raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                             sqlstate=exc.sqlstate)
+
+        self._do_handshake()
+
+    def close(self):
+        """Disconnect from the MySQL server"""
+        if self._cmysql:
+            try:
+                self.free_result()
+                self._cmysql.close()
+            except MySQLInterfaceError as exc:
+                raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                                 sqlstate=exc.sqlstate)
+            self._cmysql = None
+    disconnect = close
+
+    def is_connected(self):
+        """Reports whether the connection to MySQL Server is available"""
+        if self._cmysql:
+            return self._cmysql.ping()
+
+        return False
+
+    def ping(self, reconnect=False, attempts=1, delay=0):
+        """Check availability of the MySQL server
+
+        When reconnect is set to True, one or more attempts are made to try
+        to reconnect to the MySQL server using the reconnect()-method.
+
+        delay is the number of seconds to wait between each retry.
+
+        When the connection is not available, an InterfaceError is raised. Use
+        the is_connected()-method if you just want to check the connection
+        without raising an error.
+
+        Raises InterfaceError on errors.
+        """
+        errmsg = "Connection to MySQL is not available"
+
+        try:
+            connected = self._cmysql.ping()
+        except AttributeError:
+            pass  # Raise or reconnect later
+        else:
+            if connected:
+                return
+
+        if reconnect:
+            self.reconnect(attempts=attempts, delay=delay)
+        else:
+            raise errors.InterfaceError(errmsg)
+
+    def set_character_set_name(self, charset):
+        """Sets the default character set name for current connection.
+        """
+        self._cmysql.set_character_set(charset)
+
+    def info_query(self, query):
+        """Send a query which only returns 1 row"""
+        self._cmysql.query(query)
+        first_row = ()
+        if self._cmysql.have_result_set:
+            first_row = self._cmysql.fetch_row()
+            if self._cmysql.fetch_row():
+                self._cmysql.free_result()
+                raise errors.InterfaceError(
+                    "Query should not return more than 1 row")
+        self._cmysql.free_result()
+
+        return first_row
+
+    @property
+    def connection_id(self):
+        """MySQL connection ID"""
+        try:
+            return self._cmysql.thread_id()
+        except MySQLInterfaceError:
+            pass  # Just return None
+
+        return None
+
+    def get_rows(self, count=None, binary=False, columns=None, raw=None,
+                 prep_stmt=None):
+        """Get all or a subset of rows returned by the MySQL server"""
+        unread_result = prep_stmt.have_result_set if prep_stmt \
+            else self.unread_result
+        if not (self._cmysql and unread_result):
+            raise errors.InternalError("No result set available")
+
+        if raw is None:
+            raw = self._raw
+
+        rows = []
+        if count is not None and count <= 0:
+            raise AttributeError("count should be 1 or higher, or None")
+
+        counter = 0
+        try:
+            row = prep_stmt.fetch_row() if prep_stmt \
+                else self._cmysql.fetch_row()
+            while row:
+                if not self._raw and self.converter:
+                    row = list(row)
+                    for i, _ in enumerate(row):
+                        if not raw:
+                            row[i] = self.converter.to_python(self._columns[i],
+                                                              row[i])
+                    row = tuple(row)
+                rows.append(row)
+                counter += 1
+                if count and counter == count:
+                    break
+                row = prep_stmt.fetch_row() if prep_stmt \
+                        else self._cmysql.fetch_row()
+            if not row:
+                _eof = self.fetch_eof_columns(prep_stmt)['eof']
+                if prep_stmt:
+                    prep_stmt.free_result()
+                    self._unread_result = False
+                else:
+                    self.free_result()
+            else:
+                _eof = None
+        except MySQLInterfaceError as exc:
+            if prep_stmt:
+                prep_stmt.free_result()
+                raise errors.InterfaceError(str(exc))
+            else:
+                self.free_result()
+                raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                                 sqlstate=exc.sqlstate)
+
+        return rows, _eof
+
+    def get_row(self, binary=False, columns=None, raw=None, prep_stmt=None):
+        """Get the next rows returned by the MySQL server"""
+        try:
+            rows, eof = self.get_rows(count=1, binary=binary, columns=columns,
+                                      raw=raw, prep_stmt=prep_stmt)
+            if rows:
+                return (rows[0], eof)
+            return (None, eof)
+        except IndexError:
+            # No row available
+            return (None, None)
+
+    def next_result(self):
+        """Reads the next result"""
+        if self._cmysql:
+            self._cmysql.consume_result()
+            return self._cmysql.next_result()
+        return None
+
+    def free_result(self):
+        """Frees the result"""
+        if self._cmysql:
+            self._cmysql.free_result()
+
+    def commit(self):
+        """Commit current transaction"""
+        if self._cmysql:
+            self._cmysql.commit()
+
+    def rollback(self):
+        """Rollback current transaction"""
+        if self._cmysql:
+            self._cmysql.consume_result()
+            self._cmysql.rollback()
+
+    def cmd_init_db(self, database):
+        """Change the current database"""
+        try:
+            self._cmysql.select_db(database)
+        except MySQLInterfaceError as exc:
+            raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                             sqlstate=exc.sqlstate)
+
+    def fetch_eof_columns(self, prep_stmt=None):
+        """Fetch EOF and column information"""
+        have_result_set = prep_stmt.have_result_set if prep_stmt \
+            else self._cmysql.have_result_set
+        if not have_result_set:
+            raise errors.InterfaceError("No result set")
+
+        fields = prep_stmt.fetch_fields() if prep_stmt \
+            else self._cmysql.fetch_fields()
+        self._columns = []
+        for col in fields:
+            self._columns.append((
+                col[4],
+                int(col[8]),
+                None,
+                None,
+                None,
+                None,
+                ~int(col[9]) & FieldFlag.NOT_NULL,
+                int(col[9])
+            ))
+
+        return {
+            'eof': {
+                'status_flag': self._server_status,
+                'warning_count': self._cmysql.st_warning_count(),
+            },
+            'columns': self._columns,
+        }
+
+    def fetch_eof_status(self):
+        """Fetch EOF and status information"""
+        if self._cmysql:
+            return {
+                'warning_count': self._cmysql.st_warning_count(),
+                'field_count': self._cmysql.st_field_count(),
+                'insert_id': self._cmysql.insert_id(),
+                'affected_rows': self._cmysql.affected_rows(),
+                'server_status': self._server_status,
+            }
+
+        return None
+
+    def cmd_stmt_prepare(self, statement):
+        """Prepares the SQL statement"""
+        if not self._cmysql:
+            raise errors.OperationalError("MySQL Connection not available")
+
+        try:
+            return self._cmysql.stmt_prepare(statement)
+        except MySQLInterfaceError as err:
+            raise errors.InterfaceError(str(err))
+
+    # pylint: disable=W0221
+    def cmd_stmt_execute(self, prep_stmt, *args):
+        """Executes the prepared statement"""
+        try:
+            prep_stmt.stmt_execute(*args)
+        except MySQLInterfaceError as err:
+            raise errors.InterfaceError(str(err))
+
+        self._columns = []
+        if not prep_stmt.have_result_set:
+            # No result
+            self._unread_result = False
+            return self.fetch_eof_status()
+
+        self._unread_result = True
+        return self.fetch_eof_columns(prep_stmt)
+
+    def cmd_stmt_close(self, prep_stmt):
+        """Closes the prepared statement"""
+        if self._unread_result:
+            raise errors.InternalError("Unread result found")
+        prep_stmt.stmt_close()
+
+    def cmd_stmt_reset(self, prep_stmt):
+        """Resets the prepared statement"""
+        if self._unread_result:
+            raise errors.InternalError("Unread result found")
+        prep_stmt.stmt_reset()
+    # pylint: enable=W0221
+
+    def cmd_query(self, query, raw=None, buffered=False, raw_as_string=False):
+        """Send a query to the MySQL server"""
+        self.handle_unread_result()
+        if raw is None:
+            raw = self._raw
+        try:
+            if not isinstance(query, bytes):
+                query = query.encode('utf-8')
+            self._cmysql.query(query,
+                               raw=raw, buffered=buffered,
+                               raw_as_string=raw_as_string)
+        except MySQLInterfaceError as exc:
+            raise errors.get_mysql_exception(exc.errno, msg=exc.msg,
+                                             sqlstate=exc.sqlstate)
+        except AttributeError:
+            if self._unix_socket:
+                addr = self._unix_socket
+            else:
+                addr = self._host + ':' + str(self._port)
+            raise errors.OperationalError(
+                errno=2055, values=(addr, 'Connection not available.'))
+
+        self._columns = []
+        if not self._cmysql.have_result_set:
+            # No result
+            return self.fetch_eof_status()
+
+        return self.fetch_eof_columns()
+    _execute_query = cmd_query
+
+    def cursor(self, buffered=None, raw=None, prepared=None, cursor_class=None,
+               dictionary=None, named_tuple=None):
+        """Instantiates and returns a cursor using C Extension
+
+        By default, CMySQLCursor is returned. Depending on the options
+        while connecting, a buffered and/or raw cursor is instantiated
+        instead. Also depending upon the cursor options, rows can be
+        returned as dictionary or named tuple.
+
+        Dictionary and namedtuple based cursors are available with buffered
+        output but not raw.
+
+        It is possible to also give a custom cursor through the
+        cursor_class parameter, but it needs to be a subclass of
+        mysql.connector.cursor_cext.CMySQLCursor.
+
+        Raises ProgrammingError when cursor_class is not a subclass of
+        CursorBase. Raises ValueError when cursor is not available.
+
+        Returns instance of CMySQLCursor or subclass.
+
+        :param buffered: Return a buffering cursor
+        :param raw: Return a raw cursor
+        :param prepared: Return a cursor which uses prepared statements
+        :param cursor_class: Use a custom cursor class
+        :param dictionary: Rows are returned as dictionary
+        :param named_tuple: Rows are returned as named tuple
+        :return: Subclass of CMySQLCursor
+        :rtype: CMySQLCursor or subclass
+        """
+        self.handle_unread_result(prepared)
+        if not self.is_connected():
+            raise errors.OperationalError("MySQL Connection not available.")
+        if cursor_class is not None:
+            if not issubclass(cursor_class, MySQLCursorAbstract):
+                raise errors.ProgrammingError(
+                    "Cursor class needs be to subclass"
+                    " of cursor_cext.CMySQLCursor")
+            return (cursor_class)(self)
+
+        buffered = buffered or self._buffered
+        raw = raw or self._raw
+
+        cursor_type = 0
+        if buffered is True:
+            cursor_type |= 1
+        if raw is True:
+            cursor_type |= 2
+        if dictionary is True:
+            cursor_type |= 4
+        if named_tuple is True:
+            cursor_type |= 8
+        if prepared is True:
+            cursor_type |= 16
+
+        types = {
+            0: CMySQLCursor,  # 0
+            1: CMySQLCursorBuffered,
+            2: CMySQLCursorRaw,
+            3: CMySQLCursorBufferedRaw,
+            4: CMySQLCursorDict,
+            5: CMySQLCursorBufferedDict,
+            8: CMySQLCursorNamedTuple,
+            9: CMySQLCursorBufferedNamedTuple,
+            16: CMySQLCursorPrepared
+        }
+        try:
+            return (types[cursor_type])(self)
+        except KeyError:
+            args = ('buffered', 'raw', 'dictionary', 'named_tuple', 'prepared')
+            raise ValueError('Cursor not available with given criteria: ' +
+                             ', '.join([args[i] for i in range(5)
+                                        if cursor_type & (1 << i) != 0]))
+
+    @property
+    def num_rows(self):
+        """Returns number of rows of current result set"""
+        if not self._cmysql.have_result_set:
+            raise errors.InterfaceError("No result set")
+
+        return self._cmysql.num_rows()
+
+    @property
+    def warning_count(self):
+        """Returns number of warnings"""
+        if not self._cmysql:
+            return 0
+
+        return self._cmysql.warning_count()
+
+    @property
+    def result_set_available(self):
+        """Check if a result set is available"""
+        if not self._cmysql:
+            return False
+
+        return self._cmysql.have_result_set
+
+    @property
+    def unread_result(self):
+        """Check if there are unread results or rows"""
+        return self.result_set_available
+
+    @property
+    def more_results(self):
+        """Check if there are more results"""
+        return self._cmysql.more_results()
+
+    def prepare_for_mysql(self, params):
+        """Prepare parameters for statements
+
+        This method is use by cursors to prepared parameters found in the
+        list (or tuple) params.
+
+        Returns dict.
+        """
+        if isinstance(params, (list, tuple)):
+            result = self._cmysql.convert_to_mysql(*params)
+        elif isinstance(params, dict):
+            result = {}
+            for key, value in params.items():
+                result[key] = self._cmysql.convert_to_mysql(value)[0]
+        else:
+            raise ValueError("Could not process parameters")
+
+        return result
+
+    def consume_results(self):
+        """Consume the current result
+
+        This method consume the result by reading (consuming) all rows.
+        """
+        self._cmysql.consume_result()
+
+    def cmd_change_user(self, username='', password='', database='',
+                        charset=45):
+        """Change the current logged in user"""
+        try:
+            self._cmysql.change_user(username, password, database)
+        except MySQLInterfaceError as exc:
+            raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                             sqlstate=exc.sqlstate)
+
+        self._charset_id = charset
+        self._post_connection()
+
+    def cmd_reset_connection(self):
+        """Resets the session state without re-authenticating
+
+        Works only for MySQL server 5.7.3 or later.
+        """
+        if self._server_version < (5, 7, 3):
+            raise errors.NotSupportedError("MySQL version 5.7.2 and "
+                                           "earlier does not support "
+                                           "COM_RESET_CONNECTION.")
+        try:
+            self._cmysql.reset_connection()
+        except MySQLInterfaceError as exc:
+            raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                             sqlstate=exc.sqlstate)
+
+        self._post_connection()
+
+    def cmd_refresh(self, options):
+        """Send the Refresh command to the MySQL server"""
+        try:
+            self._cmysql.refresh(options)
+        except MySQLInterfaceError as exc:
+            raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                             sqlstate=exc.sqlstate)
+
+        return self.fetch_eof_status()
+
+    def cmd_quit(self):
+        """Close the current connection with the server"""
+        self.close()
+
+    def cmd_shutdown(self, shutdown_type=None):
+        """Shut down the MySQL Server"""
+        if not self._cmysql:
+            raise errors.OperationalError("MySQL Connection not available")
+
+        if shutdown_type:
+            if not ShutdownType.get_info(shutdown_type):
+                raise errors.InterfaceError("Invalid shutdown type")
+            level = shutdown_type
+        else:
+            level = ShutdownType.SHUTDOWN_DEFAULT
+
+        try:
+            self._cmysql.shutdown(level)
+        except MySQLInterfaceError as exc:
+            raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                             sqlstate=exc.sqlstate)
+        self.close()
+
+    def cmd_statistics(self):
+        """Return statistics from the MySQL server"""
+        self.handle_unread_result()
+
+        try:
+            stat = self._cmysql.stat()
+            return MySQLProtocol().parse_statistics(stat, with_header=False)
+        except (MySQLInterfaceError, errors.InterfaceError) as exc:
+            raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                             sqlstate=exc.sqlstate)
+
+    def cmd_process_kill(self, mysql_pid):
+        """Kill a MySQL process"""
+        if not isinstance(mysql_pid, INT_TYPES):
+            raise ValueError("MySQL PID must be int")
+        self.info_query("KILL {0}".format(mysql_pid))
+
+    def handle_unread_result(self, prepared=False):
+        """Check whether there is an unread result"""
+        unread_result = self._unread_result if prepared is True \
+            else self.unread_result
+        if self.can_consume_results:
+            self.consume_results()
+        elif unread_result:
+            raise errors.InternalError("Unread result found")
+
+    def reset_session(self, user_variables=None, session_variables=None):
+        """Clears the current active session
+
+        This method resets the session state, if the MySQL server is 5.7.3
+        or later active session will be reset without re-authenticating.
+        For other server versions session will be reset by re-authenticating.
+
+        It is possible to provide a sequence of variables and their values to
+        be set after clearing the session. This is possible for both user
+        defined variables and session variables.
+        This method takes two arguments user_variables and session_variables
+        which are dictionaries.
+
+        Raises OperationalError if not connected, InternalError if there are
+        unread results and InterfaceError on errors.
+        """
+        if not self.is_connected():
+            raise errors.OperationalError("MySQL Connection not available.")
+
+        try:
+            self.cmd_reset_connection()
+        except (errors.NotSupportedError, NotImplementedError):
+            if self._compress:
+                raise errors.NotSupportedError(
+                    "Reset session is not supported with compression for "
+                    "MySQL server version 5.7.2 or earlier.")
+            elif self._server_version < (5, 7, 3):
+                raise errors.NotSupportedError(
+                    "Reset session is not supported with MySQL server "
+                    "version 5.7.2 or earlier.")
+            else:
+                self.cmd_change_user(self._user, self._password,
+                                     self._database, self._charset_id)
+
+        if user_variables or session_variables:
+            cur = self.cursor()
+            if user_variables:
+                for key, value in user_variables.items():
+                    cur.execute("SET @`{0}` = %s".format(key), (value,))
+            if session_variables:
+                for key, value in session_variables.items():
+                    cur.execute("SET SESSION `{0}` = %s".format(key), (value,))
+            cur.close()
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/constants.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/constants.py
new file mode 100644
index 0000000..40a6152
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/constants.py
@@ -0,0 +1,1051 @@
+# Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Various MySQL constants and character sets
+"""
+
+import ssl
+
+from .errors import ProgrammingError
+from .charsets import MYSQL_CHARACTER_SETS
+
+MAX_PACKET_LENGTH = 16777215
+NET_BUFFER_LENGTH = 8192
+MAX_MYSQL_TABLE_COLUMNS = 4096
+
+DEFAULT_CONFIGURATION = {
+    'database': None,
+    'user': '',
+    'password': '',
+    'host': '127.0.0.1',
+    'port': 3306,
+    'unix_socket': None,
+    'use_unicode': True,
+    'charset': 'utf8mb4',
+    'collation': None,
+    'converter_class': None,
+    'autocommit': False,
+    'time_zone': None,
+    'sql_mode': None,
+    'get_warnings': False,
+    'raise_on_warnings': False,
+    'connection_timeout': None,
+    'client_flags': 0,
+    'compress': False,
+    'buffered': False,
+    'raw': False,
+    'ssl_ca': None,
+    'ssl_cert': None,
+    'ssl_key': None,
+    'ssl_verify_cert': False,
+    'ssl_verify_identity': False,
+    'ssl_cipher': None,
+    'tls_ciphersuites': None,
+    'ssl_disabled': False,
+    'tls_versions': None,
+    'passwd': None,
+    'db': None,
+    'connect_timeout': None,
+    'dsn': None,
+    'force_ipv6': False,
+    'auth_plugin': None,
+    'allow_local_infile': False,
+    'allow_local_infile_in_path': None,
+    'consume_results': False,
+    'conn_attrs': None,
+    'dns_srv': False,
+    'use_pure': False
+}
+
+CNX_POOL_ARGS = ('pool_name', 'pool_size', 'pool_reset_session')
+
+TLS_VERSIONS = ["TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3"]
+
+
+def flag_is_set(flag, flags):
+    """Checks if the flag is set
+
+    Returns boolean"""
+    if (flags & flag) > 0:
+        return True
+    return False
+
+
+class _Constants(object):
+    """
+    Base class for constants
+    """
+    prefix = ''
+    desc = {}
+
+    def __new__(cls):
+        raise TypeError("Can not instanciate from %s" % cls.__name__)
+
+    @classmethod
+    def get_desc(cls, name):
+        """Get description of given constant"""
+        try:
+            return cls.desc[name][1]
+        except:
+            return None
+
+    @classmethod
+    def get_info(cls, setid):
+        """Get information about given constant"""
+        for name, info in cls.desc.items():
+            if info[0] == setid:
+                return name
+        return None
+
+    @classmethod
+    def get_full_info(cls):
+        """get full information about given constant"""
+        res = ()
+        try:
+            res = ["%s : %s" % (k, v[1]) for k, v in cls.desc.items()]
+        except Exception as err:  # pylint: disable=W0703
+            res = ('No information found in constant class.%s' % err)
+
+        return res
+
+
+class _Flags(_Constants):
+    """Base class for classes describing flags
+    """
+
+    @classmethod
+    def get_bit_info(cls, value):
+        """Get the name of all bits set
+
+        Returns a list of strings."""
+        res = []
+        for name, info in cls.desc.items():
+            if value & info[0]:
+                res.append(name)
+        return res
+
+
+class FieldType(_Constants):
+    """MySQL Field Types
+    """
+    prefix = 'FIELD_TYPE_'
+    DECIMAL = 0x00
+    TINY = 0x01
+    SHORT = 0x02
+    LONG = 0x03
+    FLOAT = 0x04
+    DOUBLE = 0x05
+    NULL = 0x06
+    TIMESTAMP = 0x07
+    LONGLONG = 0x08
+    INT24 = 0x09
+    DATE = 0x0a
+    TIME = 0x0b
+    DATETIME = 0x0c
+    YEAR = 0x0d
+    NEWDATE = 0x0e
+    VARCHAR = 0x0f
+    BIT = 0x10
+    JSON = 0xf5
+    NEWDECIMAL = 0xf6
+    ENUM = 0xf7
+    SET = 0xf8
+    TINY_BLOB = 0xf9
+    MEDIUM_BLOB = 0xfa
+    LONG_BLOB = 0xfb
+    BLOB = 0xfc
+    VAR_STRING = 0xfd
+    STRING = 0xfe
+    GEOMETRY = 0xff
+
+    desc = {
+        'DECIMAL': (0x00, 'DECIMAL'),
+        'TINY': (0x01, 'TINY'),
+        'SHORT': (0x02, 'SHORT'),
+        'LONG': (0x03, 'LONG'),
+        'FLOAT': (0x04, 'FLOAT'),
+        'DOUBLE': (0x05, 'DOUBLE'),
+        'NULL': (0x06, 'NULL'),
+        'TIMESTAMP': (0x07, 'TIMESTAMP'),
+        'LONGLONG': (0x08, 'LONGLONG'),
+        'INT24': (0x09, 'INT24'),
+        'DATE': (0x0a, 'DATE'),
+        'TIME': (0x0b, 'TIME'),
+        'DATETIME': (0x0c, 'DATETIME'),
+        'YEAR': (0x0d, 'YEAR'),
+        'NEWDATE': (0x0e, 'NEWDATE'),
+        'VARCHAR': (0x0f, 'VARCHAR'),
+        'BIT': (0x10, 'BIT'),
+        'JSON': (0xf5, 'JSON'),
+        'NEWDECIMAL': (0xf6, 'NEWDECIMAL'),
+        'ENUM': (0xf7, 'ENUM'),
+        'SET': (0xf8, 'SET'),
+        'TINY_BLOB': (0xf9, 'TINY_BLOB'),
+        'MEDIUM_BLOB': (0xfa, 'MEDIUM_BLOB'),
+        'LONG_BLOB': (0xfb, 'LONG_BLOB'),
+        'BLOB': (0xfc, 'BLOB'),
+        'VAR_STRING': (0xfd, 'VAR_STRING'),
+        'STRING': (0xfe, 'STRING'),
+        'GEOMETRY': (0xff, 'GEOMETRY'),
+    }
+
+    @classmethod
+    def get_string_types(cls):
+        """Get the list of all string types"""
+        return [
+            cls.VARCHAR,
+            cls.ENUM,
+            cls.VAR_STRING, cls.STRING,
+        ]
+
+    @classmethod
+    def get_binary_types(cls):
+        """Get the list of all binary types"""
+        return [
+            cls.TINY_BLOB, cls.MEDIUM_BLOB,
+            cls.LONG_BLOB, cls.BLOB,
+        ]
+
+    @classmethod
+    def get_number_types(cls):
+        """Get the list of all number types"""
+        return [
+            cls.DECIMAL, cls.NEWDECIMAL,
+            cls.TINY, cls.SHORT, cls.LONG,
+            cls.FLOAT, cls.DOUBLE,
+            cls.LONGLONG, cls.INT24,
+            cls.BIT,
+            cls.YEAR,
+        ]
+
+    @classmethod
+    def get_timestamp_types(cls):
+        """Get the list of all timestamp types"""
+        return [
+            cls.DATETIME, cls.TIMESTAMP,
+        ]
+
+
+class FieldFlag(_Flags):
+    """MySQL Field Flags
+
+    Field flags as found in MySQL sources mysql-src/include/mysql_com.h
+    """
+    _prefix = ''
+    NOT_NULL = 1 << 0
+    PRI_KEY = 1 << 1
+    UNIQUE_KEY = 1 << 2
+    MULTIPLE_KEY = 1 << 3
+    BLOB = 1 << 4
+    UNSIGNED = 1 << 5
+    ZEROFILL = 1 << 6
+    BINARY = 1 << 7
+
+    ENUM = 1 << 8
+    AUTO_INCREMENT = 1 << 9
+    TIMESTAMP = 1 << 10
+    SET = 1 << 11
+
+    NO_DEFAULT_VALUE = 1 << 12
+    ON_UPDATE_NOW = 1 << 13
+    NUM = 1 << 14
+    PART_KEY = 1 << 15
+    GROUP = 1 << 14  # SAME AS NUM !!!!!!!????
+    UNIQUE = 1 << 16
+    BINCMP = 1 << 17
+
+    GET_FIXED_FIELDS = 1 << 18
+    FIELD_IN_PART_FUNC = 1 << 19
+    FIELD_IN_ADD_INDEX = 1 << 20
+    FIELD_IS_RENAMED = 1 << 21
+
+    desc = {
+        'NOT_NULL': (1 << 0, "Field can't be NULL"),
+        'PRI_KEY': (1 << 1, "Field is part of a primary key"),
+        'UNIQUE_KEY': (1 << 2, "Field is part of a unique key"),
+        'MULTIPLE_KEY': (1 << 3, "Field is part of a key"),
+        'BLOB': (1 << 4, "Field is a blob"),
+        'UNSIGNED': (1 << 5, "Field is unsigned"),
+        'ZEROFILL': (1 << 6, "Field is zerofill"),
+        'BINARY': (1 << 7, "Field is binary  "),
+        'ENUM': (1 << 8, "field is an enum"),
+        'AUTO_INCREMENT': (1 << 9, "field is a autoincrement field"),
+        'TIMESTAMP': (1 << 10, "Field is a timestamp"),
+        'SET': (1 << 11, "field is a set"),
+        'NO_DEFAULT_VALUE': (1 << 12, "Field doesn't have default value"),
+        'ON_UPDATE_NOW': (1 << 13, "Field is set to NOW on UPDATE"),
+        'NUM': (1 << 14, "Field is num (for clients)"),
+
+        'PART_KEY': (1 << 15, "Intern; Part of some key"),
+        'GROUP': (1 << 14, "Intern: Group field"),  # Same as NUM
+        'UNIQUE': (1 << 16, "Intern: Used by sql_yacc"),
+        'BINCMP': (1 << 17, "Intern: Used by sql_yacc"),
+        'GET_FIXED_FIELDS': (1 << 18, "Used to get fields in item tree"),
+        'FIELD_IN_PART_FUNC': (1 << 19, "Field part of partition func"),
+        'FIELD_IN_ADD_INDEX': (1 << 20, "Intern: Field used in ADD INDEX"),
+        'FIELD_IS_RENAMED': (1 << 21, "Intern: Field is being renamed"),
+    }
+
+
+class ServerCmd(_Constants):
+    """MySQL Server Commands
+    """
+    _prefix = 'COM_'
+    SLEEP = 0
+    QUIT = 1
+    INIT_DB = 2
+    QUERY = 3
+    FIELD_LIST = 4
+    CREATE_DB = 5
+    DROP_DB = 6
+    REFRESH = 7
+    SHUTDOWN = 8
+    STATISTICS = 9
+    PROCESS_INFO = 10
+    CONNECT = 11
+    PROCESS_KILL = 12
+    DEBUG = 13
+    PING = 14
+    TIME = 15
+    DELAYED_INSERT = 16
+    CHANGE_USER = 17
+    BINLOG_DUMP = 18
+    TABLE_DUMP = 19
+    CONNECT_OUT = 20
+    REGISTER_SLAVE = 21
+    STMT_PREPARE = 22
+    STMT_EXECUTE = 23
+    STMT_SEND_LONG_DATA = 24
+    STMT_CLOSE = 25
+    STMT_RESET = 26
+    SET_OPTION = 27
+    STMT_FETCH = 28
+    DAEMON = 29
+    BINLOG_DUMP_GTID = 30
+    RESET_CONNECTION = 31
+
+    desc = {
+        'SLEEP': (0, 'SLEEP'),
+        'QUIT': (1, 'QUIT'),
+        'INIT_DB': (2, 'INIT_DB'),
+        'QUERY': (3, 'QUERY'),
+        'FIELD_LIST': (4, 'FIELD_LIST'),
+        'CREATE_DB': (5, 'CREATE_DB'),
+        'DROP_DB': (6, 'DROP_DB'),
+        'REFRESH': (7, 'REFRESH'),
+        'SHUTDOWN': (8, 'SHUTDOWN'),
+        'STATISTICS': (9, 'STATISTICS'),
+        'PROCESS_INFO': (10, 'PROCESS_INFO'),
+        'CONNECT': (11, 'CONNECT'),
+        'PROCESS_KILL': (12, 'PROCESS_KILL'),
+        'DEBUG': (13, 'DEBUG'),
+        'PING': (14, 'PING'),
+        'TIME': (15, 'TIME'),
+        'DELAYED_INSERT': (16, 'DELAYED_INSERT'),
+        'CHANGE_USER': (17, 'CHANGE_USER'),
+        'BINLOG_DUMP': (18, 'BINLOG_DUMP'),
+        'TABLE_DUMP': (19, 'TABLE_DUMP'),
+        'CONNECT_OUT': (20, 'CONNECT_OUT'),
+        'REGISTER_SLAVE': (21, 'REGISTER_SLAVE'),
+        'STMT_PREPARE': (22, 'STMT_PREPARE'),
+        'STMT_EXECUTE': (23, 'STMT_EXECUTE'),
+        'STMT_SEND_LONG_DATA': (24, 'STMT_SEND_LONG_DATA'),
+        'STMT_CLOSE': (25, 'STMT_CLOSE'),
+        'STMT_RESET': (26, 'STMT_RESET'),
+        'SET_OPTION': (27, 'SET_OPTION'),
+        'STMT_FETCH': (28, 'STMT_FETCH'),
+        'DAEMON': (29, 'DAEMON'),
+        'BINLOG_DUMP_GTID': (30, 'BINLOG_DUMP_GTID'),
+        'RESET_CONNECTION': (31, 'RESET_CONNECTION'),
+    }
+
+
+class ClientFlag(_Flags):
+    """MySQL Client Flags
+
+    Client options as found in the MySQL sources mysql-src/include/mysql_com.h
+    """
+    LONG_PASSWD = 1 << 0
+    FOUND_ROWS = 1 << 1
+    LONG_FLAG = 1 << 2
+    CONNECT_WITH_DB = 1 << 3
+    NO_SCHEMA = 1 << 4
+    COMPRESS = 1 << 5
+    ODBC = 1 << 6
+    LOCAL_FILES = 1 << 7
+    IGNORE_SPACE = 1 << 8
+    PROTOCOL_41 = 1 << 9
+    INTERACTIVE = 1 << 10
+    SSL = 1 << 11
+    IGNORE_SIGPIPE = 1 << 12
+    TRANSACTIONS = 1 << 13
+    RESERVED = 1 << 14
+    SECURE_CONNECTION = 1 << 15
+    MULTI_STATEMENTS = 1 << 16
+    MULTI_RESULTS = 1 << 17
+    PS_MULTI_RESULTS = 1 << 18
+    PLUGIN_AUTH = 1 << 19
+    CONNECT_ARGS = 1 << 20
+    PLUGIN_AUTH_LENENC_CLIENT_DATA = 1 << 21
+    CAN_HANDLE_EXPIRED_PASSWORDS = 1 << 22
+    SESION_TRACK = 1 << 23
+    DEPRECATE_EOF = 1 << 24
+    SSL_VERIFY_SERVER_CERT = 1 << 30
+    REMEMBER_OPTIONS = 1 << 31
+
+    desc = {
+        'LONG_PASSWD': (1 << 0, 'New more secure passwords'),
+        'FOUND_ROWS': (1 << 1, 'Found instead of affected rows'),
+        'LONG_FLAG': (1 << 2, 'Get all column flags'),
+        'CONNECT_WITH_DB': (1 << 3, 'One can specify db on connect'),
+        'NO_SCHEMA': (1 << 4, "Don't allow database.table.column"),
+        'COMPRESS': (1 << 5, 'Can use compression protocol'),
+        'ODBC': (1 << 6, 'ODBC client'),
+        'LOCAL_FILES': (1 << 7, 'Can use LOAD DATA LOCAL'),
+        'IGNORE_SPACE': (1 << 8, "Ignore spaces before ''"),
+        'PROTOCOL_41': (1 << 9, 'New 4.1 protocol'),
+        'INTERACTIVE': (1 << 10, 'This is an interactive client'),
+        'SSL': (1 << 11, 'Switch to SSL after handshake'),
+        'IGNORE_SIGPIPE': (1 << 12, 'IGNORE sigpipes'),
+        'TRANSACTIONS': (1 << 13, 'Client knows about transactions'),
+        'RESERVED': (1 << 14, 'Old flag for 4.1 protocol'),
+        'SECURE_CONNECTION': (1 << 15, 'New 4.1 authentication'),
+        'MULTI_STATEMENTS': (1 << 16, 'Enable/disable multi-stmt support'),
+        'MULTI_RESULTS': (1 << 17, 'Enable/disable multi-results'),
+        'PS_MULTI_RESULTS': (1 << 18, 'Multi-results in PS-protocol'),
+        'PLUGIN_AUTH': (1 << 19, 'Client supports plugin authentication'),
+        'CONNECT_ARGS': (1 << 20, 'Client supports connection attributes'),
+        'PLUGIN_AUTH_LENENC_CLIENT_DATA': (1 << 21,
+                                           'Enable authentication response packet to be larger than 255 bytes'),
+        'CAN_HANDLE_EXPIRED_PASSWORDS': (1 << 22, "Don't close the connection for a connection with expired password"),
+        'SESION_TRACK': (1 << 23, 'Capable of handling server state change information'),
+        'DEPRECATE_EOF': (1 << 24, 'Client no longer needs EOF packet'),
+        'SSL_VERIFY_SERVER_CERT': (1 << 30, ''),
+        'REMEMBER_OPTIONS': (1 << 31, ''),
+    }
+
+    default = [
+        LONG_PASSWD,
+        LONG_FLAG,
+        CONNECT_WITH_DB,
+        PROTOCOL_41,
+        TRANSACTIONS,
+        SECURE_CONNECTION,
+        MULTI_STATEMENTS,
+        MULTI_RESULTS,
+        CONNECT_ARGS
+    ]
+
+    @classmethod
+    def get_default(cls):
+        """Get the default client options set
+
+        Returns a flag with all the default client options set"""
+        flags = 0
+        for option in cls.default:
+            flags |= option
+        return flags
+
+
+class ServerFlag(_Flags):
+    """MySQL Server Flags
+
+    Server flags as found in the MySQL sources mysql-src/include/mysql_com.h
+    """
+    _prefix = 'SERVER_'
+    STATUS_IN_TRANS = 1 << 0
+    STATUS_AUTOCOMMIT = 1 << 1
+    MORE_RESULTS_EXISTS = 1 << 3
+    QUERY_NO_GOOD_INDEX_USED = 1 << 4
+    QUERY_NO_INDEX_USED = 1 << 5
+    STATUS_CURSOR_EXISTS = 1 << 6
+    STATUS_LAST_ROW_SENT = 1 << 7
+    STATUS_DB_DROPPED = 1 << 8
+    STATUS_NO_BACKSLASH_ESCAPES = 1 << 9
+    SERVER_STATUS_METADATA_CHANGED = 1 << 10
+    SERVER_QUERY_WAS_SLOW = 1 << 11
+    SERVER_PS_OUT_PARAMS = 1 << 12
+    SERVER_STATUS_IN_TRANS_READONLY = 1 << 13
+    SERVER_SESSION_STATE_CHANGED = 1 << 14
+
+    desc = {
+        'SERVER_STATUS_IN_TRANS': (1 << 0,
+                                   'Transaction has started'),
+        'SERVER_STATUS_AUTOCOMMIT': (1 << 1,
+                                     'Server in auto_commit mode'),
+        'SERVER_MORE_RESULTS_EXISTS': (1 << 3,
+                                       'Multi query - '
+                                       'next query exists'),
+        'SERVER_QUERY_NO_GOOD_INDEX_USED': (1 << 4, ''),
+        'SERVER_QUERY_NO_INDEX_USED': (1 << 5, ''),
+        'SERVER_STATUS_CURSOR_EXISTS': (1 << 6,
+                                        'Set when server opened a read-only '
+                                        'non-scrollable cursor for a query.'),
+        'SERVER_STATUS_LAST_ROW_SENT': (1 << 7,
+                                        'Set when a read-only cursor is '
+                                        'exhausted'),
+        'SERVER_STATUS_DB_DROPPED': (1 << 8, 'A database was dropped'),
+        'SERVER_STATUS_NO_BACKSLASH_ESCAPES': (1 << 9, ''),
+        'SERVER_STATUS_METADATA_CHANGED': (1024,
+                                           'Set if after a prepared statement '
+                                           'reprepare we discovered that the '
+                                           'new statement returns a different '
+                                           'number of result set columns.'),
+        'SERVER_QUERY_WAS_SLOW': (2048, ''),
+        'SERVER_PS_OUT_PARAMS': (4096,
+                                 'To mark ResultSet containing output '
+                                 'parameter values.'),
+        'SERVER_STATUS_IN_TRANS_READONLY': (8192,
+                                            'Set if multi-statement '
+                                            'transaction is a read-only '
+                                            'transaction.'),
+        'SERVER_SESSION_STATE_CHANGED': (1 << 14,
+                                         'Session state has changed on the '
+                                         'server because of the execution of '
+                                         'the last statement'),
+    }
+
+
+class RefreshOption(_Constants):
+    """MySQL Refresh command options
+
+    Options used when sending the COM_REFRESH server command.
+    """
+    _prefix = 'REFRESH_'
+    GRANT = 1 << 0
+    LOG = 1 << 1
+    TABLES = 1 << 2
+    HOST = 1 << 3
+    STATUS = 1 << 4
+    THREADS = 1 << 5
+    SLAVE = 1 << 6
+
+    desc = {
+        'GRANT': (1 << 0, 'Refresh grant tables'),
+        'LOG': (1 << 1, 'Start on new log file'),
+        'TABLES': (1 << 2, 'close all tables'),
+        'HOSTS': (1 << 3, 'Flush host cache'),
+        'STATUS': (1 << 4, 'Flush status variables'),
+        'THREADS': (1 << 5, 'Flush thread cache'),
+        'SLAVE': (1 << 6, 'Reset master info and restart slave thread'),
+    }
+
+
+class ShutdownType(_Constants):
+    """MySQL Shutdown types
+
+    Shutdown types used by the COM_SHUTDOWN server command.
+    """
+    _prefix = ''
+    SHUTDOWN_DEFAULT = 0
+    SHUTDOWN_WAIT_CONNECTIONS = 1
+    SHUTDOWN_WAIT_TRANSACTIONS = 2
+    SHUTDOWN_WAIT_UPDATES = 8
+    SHUTDOWN_WAIT_ALL_BUFFERS = 16
+    SHUTDOWN_WAIT_CRITICAL_BUFFERS = 17
+    KILL_QUERY = 254
+    KILL_CONNECTION = 255
+
+    desc = {
+        'SHUTDOWN_DEFAULT': (
+            SHUTDOWN_DEFAULT,
+            "defaults to SHUTDOWN_WAIT_ALL_BUFFERS"),
+        'SHUTDOWN_WAIT_CONNECTIONS': (
+            SHUTDOWN_WAIT_CONNECTIONS,
+            "wait for existing connections to finish"),
+        'SHUTDOWN_WAIT_TRANSACTIONS': (
+            SHUTDOWN_WAIT_TRANSACTIONS,
+            "wait for existing trans to finish"),
+        'SHUTDOWN_WAIT_UPDATES': (
+            SHUTDOWN_WAIT_UPDATES,
+            "wait for existing updates to finish"),
+        'SHUTDOWN_WAIT_ALL_BUFFERS': (
+            SHUTDOWN_WAIT_ALL_BUFFERS,
+            "flush InnoDB and other storage engine buffers"),
+        'SHUTDOWN_WAIT_CRITICAL_BUFFERS': (
+            SHUTDOWN_WAIT_CRITICAL_BUFFERS,
+            "don't flush InnoDB buffers, "
+            "flush other storage engines' buffers"),
+        'KILL_QUERY': (
+            KILL_QUERY,
+            "(no description)"),
+        'KILL_CONNECTION': (
+            KILL_CONNECTION,
+            "(no description)"),
+    }
+
+
+class CharacterSet(_Constants):
+    """MySQL supported character sets and collations
+
+    List of character sets with their collations supported by MySQL. This
+    maps to the character set we get from the server within the handshake
+    packet.
+
+    The list is hardcode so we avoid a database query when getting the
+    name of the used character set or collation.
+    """
+    desc = MYSQL_CHARACTER_SETS
+
+    # Multi-byte character sets which use 5c (backslash) in characters
+    slash_charsets = (1, 13, 28, 84, 87, 88)
+
+    @classmethod
+    def get_info(cls, setid):
+        """Retrieves character set information as tuple using an ID
+
+        Retrieves character set and collation information based on the
+        given MySQL ID.
+
+        Raises ProgrammingError when character set is not supported.
+
+        Returns a tuple.
+        """
+        try:
+            return cls.desc[setid][0:2]
+        except IndexError:
+            raise ProgrammingError(
+                "Character set '{0}' unsupported".format(setid))
+
+    @classmethod
+    def get_desc(cls, name):
+        """Retrieves character set information as string using an ID
+
+        Retrieves character set and collation information based on the
+        given MySQL ID.
+
+        Returns a tuple.
+        """
+        try:
+            return "%s/%s" % cls.get_info(name)
+        except:
+            raise
+
+    @classmethod
+    def get_default_collation(cls, charset):
+        """Retrieves the default collation for given character set
+
+        Raises ProgrammingError when character set is not supported.
+
+        Returns list (collation, charset, index)
+        """
+        if isinstance(charset, int):
+            try:
+                info = cls.desc[charset]
+                return info[1], info[0], charset
+            except:
+                ProgrammingError("Character set ID '%s' unsupported." % (
+                    charset))
+
+        for cid, info in enumerate(cls.desc):
+            if info is None:
+                continue
+            if info[0] == charset and info[2] is True:
+                return info[1], info[0], cid
+
+        raise ProgrammingError("Character set '%s' unsupported." % (charset))
+
+    @classmethod
+    def get_charset_info(cls, charset=None, collation=None):
+        """Get character set information using charset name and/or collation
+
+        Retrieves character set and collation information given character
+        set name and/or a collation name.
+        If charset is an integer, it will look up the character set based
+        on the MySQL's ID.
+        For example:
+            get_charset_info('utf8',None)
+            get_charset_info(collation='utf8_general_ci')
+            get_charset_info(47)
+
+        Raises ProgrammingError when character set is not supported.
+
+        Returns a tuple with (id, characterset name, collation)
+        """
+        if isinstance(charset, int):
+            try:
+                info = cls.desc[charset]
+                return (charset, info[0], info[1])
+            except IndexError:
+                ProgrammingError("Character set ID {0} unknown.".format(
+                    charset))
+
+        if charset is not None and collation is None:
+            info = cls.get_default_collation(charset)
+            return (info[2], info[1], info[0])
+        elif charset is None and collation is not None:
+            for cid, info in enumerate(cls.desc):
+                if info is None:
+                    continue
+                if collation == info[1]:
+                    return (cid, info[0], info[1])
+            raise ProgrammingError("Collation '{0}' unknown.".format(collation))
+        else:
+            for cid, info in enumerate(cls.desc):
+                if info is None:
+                    continue
+                if info[0] == charset and info[1] == collation:
+                    return (cid, info[0], info[1])
+            _ = cls.get_default_collation(charset)
+            raise ProgrammingError("Collation '{0}' unknown.".format(collation))
+
+    @classmethod
+    def get_supported(cls):
+        """Retrieves a list with names of all supproted character sets
+
+        Returns a tuple.
+        """
+        res = []
+        for info in cls.desc:
+            if info and info[0] not in res:
+                res.append(info[0])
+        return tuple(res)
+
+
+class SQLMode(_Constants):
+    """MySQL SQL Modes
+
+    The numeric values of SQL Modes are not interesting, only the names
+    are used when setting the SQL_MODE system variable using the MySQL
+    SET command.
+
+    See http://dev.mysql.com/doc/refman/5.6/en/server-sql-mode.html
+    """
+    _prefix = 'MODE_'
+    REAL_AS_FLOAT = 'REAL_AS_FLOAT'
+    PIPES_AS_CONCAT = 'PIPES_AS_CONCAT'
+    ANSI_QUOTES = 'ANSI_QUOTES'
+    IGNORE_SPACE = 'IGNORE_SPACE'
+    NOT_USED = 'NOT_USED'
+    ONLY_FULL_GROUP_BY = 'ONLY_FULL_GROUP_BY'
+    NO_UNSIGNED_SUBTRACTION = 'NO_UNSIGNED_SUBTRACTION'
+    NO_DIR_IN_CREATE = 'NO_DIR_IN_CREATE'
+    POSTGRESQL = 'POSTGRESQL'
+    ORACLE = 'ORACLE'
+    MSSQL = 'MSSQL'
+    DB2 = 'DB2'
+    MAXDB = 'MAXDB'
+    NO_KEY_OPTIONS = 'NO_KEY_OPTIONS'
+    NO_TABLE_OPTIONS = 'NO_TABLE_OPTIONS'
+    NO_FIELD_OPTIONS = 'NO_FIELD_OPTIONS'
+    MYSQL323 = 'MYSQL323'
+    MYSQL40 = 'MYSQL40'
+    ANSI = 'ANSI'
+    NO_AUTO_VALUE_ON_ZERO = 'NO_AUTO_VALUE_ON_ZERO'
+    NO_BACKSLASH_ESCAPES = 'NO_BACKSLASH_ESCAPES'
+    STRICT_TRANS_TABLES = 'STRICT_TRANS_TABLES'
+    STRICT_ALL_TABLES = 'STRICT_ALL_TABLES'
+    NO_ZERO_IN_DATE = 'NO_ZERO_IN_DATE'
+    NO_ZERO_DATE = 'NO_ZERO_DATE'
+    INVALID_DATES = 'INVALID_DATES'
+    ERROR_FOR_DIVISION_BY_ZERO = 'ERROR_FOR_DIVISION_BY_ZERO'
+    TRADITIONAL = 'TRADITIONAL'
+    NO_AUTO_CREATE_USER = 'NO_AUTO_CREATE_USER'
+    HIGH_NOT_PRECEDENCE = 'HIGH_NOT_PRECEDENCE'
+    NO_ENGINE_SUBSTITUTION = 'NO_ENGINE_SUBSTITUTION'
+    PAD_CHAR_TO_FULL_LENGTH = 'PAD_CHAR_TO_FULL_LENGTH'
+
+    @classmethod
+    def get_desc(cls, name):
+        raise NotImplementedError
+
+    @classmethod
+    def get_info(cls, setid):
+        raise NotImplementedError
+
+    @classmethod
+    def get_full_info(cls):
+        """Returns a sequence of all available SQL Modes
+
+        This class method returns a tuple containing all SQL Mode names. The
+        names will be alphabetically sorted.
+
+        Returns a tuple.
+        """
+        res = []
+        for key in vars(cls).keys():
+            if not key.startswith('_') \
+                    and not hasattr(getattr(cls, key), '__call__'):
+                res.append(key)
+        return tuple(sorted(res))
+
+CONN_ATTRS_DN = ["_pid", "_platform", "_source_host", "_client_name",
+                 "_client_license", "_client_version", "_os", "_connector_name",
+                 "_connector_license", "_connector_version"]
+
+# TLS v1.0 cipher suites IANI to OpenSSL name translation
+TLSV1_CIPHER_SUITES = {
+    "TLS_RSA_WITH_NULL_MD5": "NULL-MD5",
+    "TLS_RSA_WITH_NULL_SHA": "NULL-SHA",
+    "TLS_RSA_WITH_RC4_128_MD5": "RC4-MD5",
+    "TLS_RSA_WITH_RC4_128_SHA": "RC4-SHA",
+    "TLS_RSA_WITH_IDEA_CBC_SHA": "IDEA-CBC-SHA",
+    "TLS_RSA_WITH_3DES_EDE_CBC_SHA": "DES-CBC3-SHA",
+
+    "TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA": "Not implemented.",
+    "TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA": "Not implemented.",
+    "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA": "DHE-DSS-DES-CBC3-SHA",
+    "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA": "DHE-RSA-DES-CBC3-SHA",
+
+    "TLS_DH_anon_WITH_RC4_128_MD5": "ADH-RC4-MD5",
+    "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA": "ADH-DES-CBC3-SHA",
+
+    # AES cipher suites from RFC3268, extending TLS v1.0
+    "TLS_RSA_WITH_AES_128_CBC_SHA": "AES128-SHA",
+    "TLS_RSA_WITH_AES_256_CBC_SHA": "AES256-SHA",
+
+    "TLS_DH_DSS_WITH_AES_128_CBC_SHA": "DH-DSS-AES128-SHA",
+    "TLS_DH_DSS_WITH_AES_256_CBC_SHA": "DH-DSS-AES256-SHA",
+    "TLS_DH_RSA_WITH_AES_128_CBC_SHA": "DH-RSA-AES128-SHA",
+    "TLS_DH_RSA_WITH_AES_256_CBC_SHA": "DH-RSA-AES256-SHA",
+
+    "TLS_DHE_DSS_WITH_AES_128_CBC_SHA": "DHE-DSS-AES128-SHA",
+    "TLS_DHE_DSS_WITH_AES_256_CBC_SHA": "DHE-DSS-AES256-SHA",
+    "TLS_DHE_RSA_WITH_AES_128_CBC_SHA": "DHE-RSA-AES128-SHA",
+    "TLS_DHE_RSA_WITH_AES_256_CBC_SHA": "DHE-RSA-AES256-SHA",
+
+    "TLS_DH_anon_WITH_AES_128_CBC_SHA": "ADH-AES128-SHA",
+    "TLS_DH_anon_WITH_AES_256_CBC_SHA": "ADH-AES256-SHA",
+
+    # Camellia cipher suites from RFC4132, extending TLS v1.0
+    "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA": "CAMELLIA128-SHA",
+    "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA": "CAMELLIA256-SHA",
+
+    "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA": "DH-DSS-CAMELLIA128-SHA",
+    "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA": "DH-DSS-CAMELLIA256-SHA",
+    "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA": "DH-RSA-CAMELLIA128-SHA",
+    "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA": "DH-RSA-CAMELLIA256-SHA",
+
+    "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA": "DHE-DSS-CAMELLIA128-SHA",
+    "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA": "DHE-DSS-CAMELLIA256-SHA",
+    "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA": "DHE-RSA-CAMELLIA128-SHA",
+    "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA": "DHE-RSA-CAMELLIA256-SHA",
+
+    "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA": "ADH-CAMELLIA128-SHA",
+    "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA": "ADH-CAMELLIA256-SHA",
+
+    # SEED cipher suites from RFC4162, extending TLS v1.0
+    "TLS_RSA_WITH_SEED_CBC_SHA": "SEED-SHA",
+
+    "TLS_DH_DSS_WITH_SEED_CBC_SHA": "DH-DSS-SEED-SHA",
+    "TLS_DH_RSA_WITH_SEED_CBC_SHA": "DH-RSA-SEED-SHA",
+
+    "TLS_DHE_DSS_WITH_SEED_CBC_SHA": "DHE-DSS-SEED-SHA",
+    "TLS_DHE_RSA_WITH_SEED_CBC_SHA": "DHE-RSA-SEED-SHA",
+
+    "TLS_DH_anon_WITH_SEED_CBC_SHA": "ADH-SEED-SHA",
+
+    # GOST cipher suites from draft-chudov-cryptopro-cptls, extending TLS v1.0
+    "TLS_GOSTR341094_WITH_28147_CNT_IMIT": "GOST94-GOST89-GOST89",
+    "TLS_GOSTR341001_WITH_28147_CNT_IMIT": "GOST2001-GOST89-GOST89",
+    "TLS_GOSTR341094_WITH_NULL_GOSTR3411": "GOST94-NULL-GOST94",
+    "TLS_GOSTR341001_WITH_NULL_GOSTR3411": "GOST2001-NULL-GOST94"}
+
+# TLS v1.1 cipher suites IANI to OpenSSL name translation
+TLSV1_1_CIPHER_SUITES = TLSV1_CIPHER_SUITES
+
+# TLS v1.2 cipher suites IANI to OpenSSL name translation
+TLSV1_2_CIPHER_SUITES = {
+    "TLS_RSA_WITH_NULL_SHA256": "NULL-SHA256",
+
+    "TLS_RSA_WITH_AES_128_CBC_SHA256": "AES128-SHA256",
+    "TLS_RSA_WITH_AES_256_CBC_SHA256": "AES256-SHA256",
+    "TLS_RSA_WITH_AES_128_GCM_SHA256": "AES128-GCM-SHA256",
+    "TLS_RSA_WITH_AES_256_GCM_SHA384": "AES256-GCM-SHA384",
+
+    "TLS_DH_RSA_WITH_AES_128_CBC_SHA256": "DH-RSA-AES128-SHA256",
+    "TLS_DH_RSA_WITH_AES_256_CBC_SHA256": "DH-RSA-AES256-SHA256",
+    "TLS_DH_RSA_WITH_AES_128_GCM_SHA256": "DH-RSA-AES128-GCM-SHA256",
+    "TLS_DH_RSA_WITH_AES_256_GCM_SHA384": "DH-RSA-AES256-GCM-SHA384",
+
+    "TLS_DH_DSS_WITH_AES_128_CBC_SHA256": "DH-DSS-AES128-SHA256",
+    "TLS_DH_DSS_WITH_AES_256_CBC_SHA256": "DH-DSS-AES256-SHA256",
+    "TLS_DH_DSS_WITH_AES_128_GCM_SHA256": "DH-DSS-AES128-GCM-SHA256",
+    "TLS_DH_DSS_WITH_AES_256_GCM_SHA384": "DH-DSS-AES256-GCM-SHA384",
+
+    "TLS_DHE_RSA_WITH_AES_128_CBC_SHA256": "DHE-RSA-AES128-SHA256",
+    "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256": "DHE-RSA-AES256-SHA256",
+    "TLS_DHE_RSA_WITH_AES_128_GCM_SHA256": "DHE-RSA-AES128-GCM-SHA256",
+    "TLS_DHE_RSA_WITH_AES_256_GCM_SHA384": "DHE-RSA-AES256-GCM-SHA384",
+
+    "TLS_DHE_DSS_WITH_AES_128_CBC_SHA256": "DHE-DSS-AES128-SHA256",
+    "TLS_DHE_DSS_WITH_AES_256_CBC_SHA256": "DHE-DSS-AES256-SHA256",
+    "TLS_DHE_DSS_WITH_AES_128_GCM_SHA256": "DHE-DSS-AES128-GCM-SHA256",
+    "TLS_DHE_DSS_WITH_AES_256_GCM_SHA384": "DHE-DSS-AES256-GCM-SHA384",
+
+    "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256": "ECDHE-RSA-AES128-SHA256",
+    "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384": "ECDHE-RSA-AES256-SHA384",
+    "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256": "ECDHE-RSA-AES128-GCM-SHA256",
+    "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384": "ECDHE-RSA-AES256-GCM-SHA384",
+
+    "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256": "ECDHE-ECDSA-AES128-SHA256",
+    "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384": "ECDHE-ECDSA-AES256-SHA384",
+    "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": "ECDHE-ECDSA-AES128-GCM-SHA256",
+    "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384": "ECDHE-ECDSA-AES256-GCM-SHA384",
+
+    "TLS_DH_anon_WITH_AES_128_CBC_SHA256": "ADH-AES128-SHA256",
+    "TLS_DH_anon_WITH_AES_256_CBC_SHA256": "ADH-AES256-SHA256",
+    "TLS_DH_anon_WITH_AES_128_GCM_SHA256": "ADH-AES128-GCM-SHA256",
+    "TLS_DH_anon_WITH_AES_256_GCM_SHA384": "ADH-AES256-GCM-SHA384",
+
+    "RSA_WITH_AES_128_CCM": "AES128-CCM",
+    "RSA_WITH_AES_256_CCM": "AES256-CCM",
+    "DHE_RSA_WITH_AES_128_CCM": "DHE-RSA-AES128-CCM",
+    "DHE_RSA_WITH_AES_256_CCM": "DHE-RSA-AES256-CCM",
+    "RSA_WITH_AES_128_CCM_8": "AES128-CCM8",
+    "RSA_WITH_AES_256_CCM_8": "AES256-CCM8",
+    "DHE_RSA_WITH_AES_128_CCM_8": "DHE-RSA-AES128-CCM8",
+    "DHE_RSA_WITH_AES_256_CCM_8": "DHE-RSA-AES256-CCM8",
+    "ECDHE_ECDSA_WITH_AES_128_CCM": "ECDHE-ECDSA-AES128-CCM",
+    "ECDHE_ECDSA_WITH_AES_256_CCM": "ECDHE-ECDSA-AES256-CCM",
+    "ECDHE_ECDSA_WITH_AES_128_CCM_8": "ECDHE-ECDSA-AES128-CCM8",
+    "ECDHE_ECDSA_WITH_AES_256_CCM_8": "ECDHE-ECDSA-AES256-CCM8",
+
+    # ARIA cipher suites from RFC6209, extending TLS v1.2
+    "TLS_RSA_WITH_ARIA_128_GCM_SHA256": "ARIA128-GCM-SHA256",
+    "TLS_RSA_WITH_ARIA_256_GCM_SHA384": "ARIA256-GCM-SHA384",
+    "TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256": "DHE-RSA-ARIA128-GCM-SHA256",
+    "TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384": "DHE-RSA-ARIA256-GCM-SHA384",
+    "TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256": "DHE-DSS-ARIA128-GCM-SHA256",
+    "TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384": "DHE-DSS-ARIA256-GCM-SHA384",
+    "TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256": "ECDHE-ECDSA-ARIA128-GCM-SHA256",
+    "TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384": "ECDHE-ECDSA-ARIA256-GCM-SHA384",
+    "TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256": "ECDHE-ARIA128-GCM-SHA256",
+    "TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384": "ECDHE-ARIA256-GCM-SHA384",
+    "TLS_PSK_WITH_ARIA_128_GCM_SHA256": "PSK-ARIA128-GCM-SHA256",
+    "TLS_PSK_WITH_ARIA_256_GCM_SHA384": "PSK-ARIA256-GCM-SHA384",
+    "TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256": "DHE-PSK-ARIA128-GCM-SHA256",
+    "TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384": "DHE-PSK-ARIA256-GCM-SHA384",
+    "TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256": "RSA-PSK-ARIA128-GCM-SHA256",
+    "TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384": "RSA-PSK-ARIA256-GCM-SHA384",
+
+    # Camellia HMAC-Based cipher suites from RFC6367, extending TLS v1.2
+    "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256": "ECDHE-ECDSA-CAMELLIA128-SHA256",
+    "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384": "ECDHE-ECDSA-CAMELLIA256-SHA384",
+    "TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256": "ECDHE-RSA-CAMELLIA128-SHA256",
+    "TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384": "ECDHE-RSA-CAMELLIA256-SHA384",
+
+    # Pre-shared keying (PSK) cipher suites",
+    "PSK_WITH_NULL_SHA": "PSK-NULL-SHA",
+    "DHE_PSK_WITH_NULL_SHA": "DHE-PSK-NULL-SHA",
+    "RSA_PSK_WITH_NULL_SHA": "RSA-PSK-NULL-SHA",
+
+    "PSK_WITH_RC4_128_SHA": "PSK-RC4-SHA",
+    "PSK_WITH_3DES_EDE_CBC_SHA": "PSK-3DES-EDE-CBC-SHA",
+    "PSK_WITH_AES_128_CBC_SHA": "PSK-AES128-CBC-SHA",
+    "PSK_WITH_AES_256_CBC_SHA": "PSK-AES256-CBC-SHA",
+
+    "DHE_PSK_WITH_RC4_128_SHA": "DHE-PSK-RC4-SHA",
+    "DHE_PSK_WITH_3DES_EDE_CBC_SHA": "DHE-PSK-3DES-EDE-CBC-SHA",
+    "DHE_PSK_WITH_AES_128_CBC_SHA": "DHE-PSK-AES128-CBC-SHA",
+    "DHE_PSK_WITH_AES_256_CBC_SHA": "DHE-PSK-AES256-CBC-SHA",
+
+    "RSA_PSK_WITH_RC4_128_SHA": "RSA-PSK-RC4-SHA",
+    "RSA_PSK_WITH_3DES_EDE_CBC_SHA": "RSA-PSK-3DES-EDE-CBC-SHA",
+    "RSA_PSK_WITH_AES_128_CBC_SHA": "RSA-PSK-AES128-CBC-SHA",
+    "RSA_PSK_WITH_AES_256_CBC_SHA": "RSA-PSK-AES256-CBC-SHA",
+
+    "PSK_WITH_AES_128_GCM_SHA256": "PSK-AES128-GCM-SHA256",
+    "PSK_WITH_AES_256_GCM_SHA384": "PSK-AES256-GCM-SHA384",
+    "DHE_PSK_WITH_AES_128_GCM_SHA256": "DHE-PSK-AES128-GCM-SHA256",
+    "DHE_PSK_WITH_AES_256_GCM_SHA384": "DHE-PSK-AES256-GCM-SHA384",
+    "RSA_PSK_WITH_AES_128_GCM_SHA256": "RSA-PSK-AES128-GCM-SHA256",
+    "RSA_PSK_WITH_AES_256_GCM_SHA384": "RSA-PSK-AES256-GCM-SHA384",
+
+    "PSK_WITH_AES_128_CBC_SHA256": "PSK-AES128-CBC-SHA256",
+    "PSK_WITH_AES_256_CBC_SHA384": "PSK-AES256-CBC-SHA384",
+    "PSK_WITH_NULL_SHA256": "PSK-NULL-SHA256",
+    "PSK_WITH_NULL_SHA384": "PSK-NULL-SHA384",
+    "DHE_PSK_WITH_AES_128_CBC_SHA256": "DHE-PSK-AES128-CBC-SHA256",
+    "DHE_PSK_WITH_AES_256_CBC_SHA384": "DHE-PSK-AES256-CBC-SHA384",
+    "DHE_PSK_WITH_NULL_SHA256": "DHE-PSK-NULL-SHA256",
+    "DHE_PSK_WITH_NULL_SHA384": "DHE-PSK-NULL-SHA384",
+    "RSA_PSK_WITH_AES_128_CBC_SHA256": "RSA-PSK-AES128-CBC-SHA256",
+    "RSA_PSK_WITH_AES_256_CBC_SHA384": "RSA-PSK-AES256-CBC-SHA384",
+    "RSA_PSK_WITH_NULL_SHA256": "RSA-PSK-NULL-SHA256",
+    "RSA_PSK_WITH_NULL_SHA384": "RSA-PSK-NULL-SHA384",
+
+    "ECDHE_PSK_WITH_RC4_128_SHA": "ECDHE-PSK-RC4-SHA",
+    "ECDHE_PSK_WITH_3DES_EDE_CBC_SHA": "ECDHE-PSK-3DES-EDE-CBC-SHA",
+    "ECDHE_PSK_WITH_AES_128_CBC_SHA": "ECDHE-PSK-AES128-CBC-SHA",
+    "ECDHE_PSK_WITH_AES_256_CBC_SHA": "ECDHE-PSK-AES256-CBC-SHA",
+    "ECDHE_PSK_WITH_AES_128_CBC_SHA256": "ECDHE-PSK-AES128-CBC-SHA256",
+    "ECDHE_PSK_WITH_AES_256_CBC_SHA384": "ECDHE-PSK-AES256-CBC-SHA384",
+    "ECDHE_PSK_WITH_NULL_SHA": "ECDHE-PSK-NULL-SHA",
+    "ECDHE_PSK_WITH_NULL_SHA256": "ECDHE-PSK-NULL-SHA256",
+    "ECDHE_PSK_WITH_NULL_SHA384": "ECDHE-PSK-NULL-SHA384",
+
+    "PSK_WITH_CAMELLIA_128_CBC_SHA256": "PSK-CAMELLIA128-SHA256",
+    "PSK_WITH_CAMELLIA_256_CBC_SHA384": "PSK-CAMELLIA256-SHA384",
+
+    "DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256": "DHE-PSK-CAMELLIA128-SHA256",
+    "DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384": "DHE-PSK-CAMELLIA256-SHA384",
+
+    "RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256": "RSA-PSK-CAMELLIA128-SHA256",
+    "RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384": "RSA-PSK-CAMELLIA256-SHA384",
+
+    "ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256": "ECDHE-PSK-CAMELLIA128-SHA256",
+    "ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384": "ECDHE-PSK-CAMELLIA256-SHA384",
+
+    "PSK_WITH_AES_128_CCM": "PSK-AES128-CCM",
+    "PSK_WITH_AES_256_CCM": "PSK-AES256-CCM",
+    "DHE_PSK_WITH_AES_128_CCM": "DHE-PSK-AES128-CCM",
+    "DHE_PSK_WITH_AES_256_CCM": "DHE-PSK-AES256-CCM",
+    "PSK_WITH_AES_128_CCM_8": "PSK-AES128-CCM8",
+    "PSK_WITH_AES_256_CCM_8": "PSK-AES256-CCM8",
+    "DHE_PSK_WITH_AES_128_CCM_8": "DHE-PSK-AES128-CCM8",
+    "DHE_PSK_WITH_AES_256_CCM_8": "DHE-PSK-AES256-CCM8",
+
+    # ChaCha20-Poly1305 cipher suites, extending TLS v1.2
+    "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256": "ECDHE-RSA-CHACHA20-POLY1305",
+    "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256": "ECDHE-ECDSA-CHACHA20-POLY1305",
+    "TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256": "DHE-RSA-CHACHA20-POLY1305",
+    "TLS_PSK_WITH_CHACHA20_POLY1305_SHA256": "PSK-CHACHA20-POLY1305",
+    "TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256": "ECDHE-PSK-CHACHA20-POLY1305",
+    "TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256": "DHE-PSK-CHACHA20-POLY1305",
+    "TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256": "RSA-PSK-CHACHA20-POLY1305"}
+
+# TLS v1.3 cipher suites IANI to OpenSSL name translation
+TLSV1_3_CIPHER_SUITES = {
+    "TLS_AES_128_GCM_SHA256": "TLS_AES_128_GCM_SHA256",
+    "TLS_AES_256_GCM_SHA384": "TLS_AES_256_GCM_SHA384",
+    "TLS_CHACHA20_POLY1305_SHA256": "TLS_CHACHA20_POLY1305_SHA256",
+    "TLS_AES_128_CCM_SHA256": "TLS_AES_128_CCM_SHA256",
+    "TLS_AES_128_CCM_8_SHA256": "TLS_AES_128_CCM_8_SHA256"}
+
+TLS_CIPHER_SUITES = {
+    "TLSv1": TLSV1_CIPHER_SUITES,
+    "TLSv1.1": TLSV1_1_CIPHER_SUITES,
+    "TLSv1.2": TLSV1_2_CIPHER_SUITES,
+    "TLSv1.3": TLSV1_3_CIPHER_SUITES}
+
+OPENSSL_CS_NAMES = {
+    "TLSv1": TLSV1_CIPHER_SUITES.values(),
+    "TLSv1.1": TLSV1_1_CIPHER_SUITES.values(),
+    "TLSv1.2": TLSV1_2_CIPHER_SUITES.values(),
+    "TLSv1.3": TLSV1_3_CIPHER_SUITES.values()}
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/conversion.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/conversion.py
new file mode 100644
index 0000000..d0214eb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/conversion.py
@@ -0,0 +1,624 @@
+# Copyright (c) 2009, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Converting MySQL and Python types
+"""
+
+import datetime
+import time
+from decimal import Decimal
+
+from .constants import FieldType, FieldFlag, CharacterSet
+from .catch23 import PY2, NUMERIC_TYPES, struct_unpack
+from .custom_types import HexLiteral
+
+CONVERT_ERROR = "Could not convert '{value}' to python {pytype}"
+
+
+class MySQLConverterBase(object):
+    """Base class for conversion classes
+
+    All class dealing with converting to and from MySQL data types must
+    be a subclass of this class.
+    """
+
+    def __init__(self, charset='utf8', use_unicode=True):
+        self.python_types = None
+        self.mysql_types = None
+        self.charset = None
+        self.charset_id = 0
+        self.use_unicode = None
+        self.set_charset(charset)
+        self.set_unicode(use_unicode)
+        self._cache_field_types = {}
+
+    def set_charset(self, charset):
+        """Set character set"""
+        if charset == 'utf8mb4':
+            charset = 'utf8'
+        if charset is not None:
+            self.charset = charset
+        else:
+            # default to utf8
+            self.charset = 'utf8'
+        self.charset_id = CharacterSet.get_charset_info(self.charset)[0]
+
+    def set_unicode(self, value=True):
+        """Set whether to use Unicode"""
+        self.use_unicode = value
+
+    def to_mysql(self, value):
+        """Convert Python data type to MySQL"""
+        type_name = value.__class__.__name__.lower()
+        try:
+            return getattr(self, "_{0}_to_mysql".format(type_name))(value)
+        except AttributeError:
+            return value
+
+    def to_python(self, vtype, value):
+        """Convert MySQL data type to Python"""
+
+        if (value == b'\x00' or value is None) and vtype[1] != FieldType.BIT:
+            # Don't go further when we hit a NULL value
+            return None
+
+        if not self._cache_field_types:
+            self._cache_field_types = {}
+            for name, info in FieldType.desc.items():
+                try:
+                    self._cache_field_types[info[0]] = getattr(
+                        self, '_{0}_to_python'.format(name))
+                except AttributeError:
+                    # We ignore field types which has no method
+                    pass
+
+        try:
+            return self._cache_field_types[vtype[1]](value, vtype)
+        except KeyError:
+            return value
+
+    def escape(self, value):
+        """Escape buffer for sending to MySQL"""
+        return value
+
+    def quote(self, buf):
+        """Quote buffer for sending to MySQL"""
+        return str(buf)
+
+
+class MySQLConverter(MySQLConverterBase):
+    """Default conversion class for MySQL Connector/Python.
+
+     o escape method: for escaping values send to MySQL
+     o quoting method: for quoting values send to MySQL in statements
+     o conversion mapping: maps Python and MySQL data types to
+       function for converting them.
+
+    Whenever one needs to convert values differently, a converter_class
+    argument can be given while instantiating a new connection like
+    cnx.connect(converter_class=CustomMySQLConverterClass).
+
+    """
+
+    def __init__(self, charset=None, use_unicode=True):
+        MySQLConverterBase.__init__(self, charset, use_unicode)
+        self._cache_field_types = {}
+
+    def escape(self, value):
+        """
+        Escapes special characters as they are expected to by when MySQL
+        receives them.
+        As found in MySQL source mysys/charset.c
+
+        Returns the value if not a string, or the escaped string.
+        """
+        if value is None:
+            return value
+        elif isinstance(value, NUMERIC_TYPES):
+            return value
+        if isinstance(value, (bytes, bytearray)):
+            value = value.replace(b'\\', b'\\\\')
+            value = value.replace(b'\n', b'\\n')
+            value = value.replace(b'\r', b'\\r')
+            value = value.replace(b'\047', b'\134\047')  # single quotes
+            value = value.replace(b'\042', b'\134\042')  # double quotes
+            value = value.replace(b'\032', b'\134\032')  # for Win32
+        else:
+            value = value.replace('\\', '\\\\')
+            value = value.replace('\n', '\\n')
+            value = value.replace('\r', '\\r')
+            value = value.replace('\047', '\134\047')  # single quotes
+            value = value.replace('\042', '\134\042')  # double quotes
+            value = value.replace('\032', '\134\032')  # for Win32
+        return value
+
+    def quote(self, buf):
+        """
+        Quote the parameters for commands. General rules:
+          o numbers are returns as bytes using ascii codec
+          o None is returned as bytearray(b'NULL')
+          o Everything else is single quoted '<buf>'
+
+        Returns a bytearray object.
+        """
+        if isinstance(buf, NUMERIC_TYPES):
+            if PY2:
+                if isinstance(buf, float):
+                    return repr(buf)
+                return str(buf)
+            return str(buf).encode('ascii')
+        elif isinstance(buf, type(None)):
+            return bytearray(b"NULL")
+        return bytearray(b"'" + buf + b"'")
+
+    def to_mysql(self, value):
+        """Convert Python data type to MySQL"""
+        type_name = value.__class__.__name__.lower()
+        try:
+            return getattr(self, "_{0}_to_mysql".format(type_name))(value)
+        except AttributeError:
+            raise TypeError("Python '{0}' cannot be converted to a "
+                            "MySQL type".format(type_name))
+
+    def to_python(self, vtype, value):
+        """Convert MySQL data type to Python"""
+        if value == 0 and vtype[1] != FieldType.BIT:  # \x00
+            # Don't go further when we hit a NULL value
+            return None
+        if value is None:
+            return None
+
+        if not self._cache_field_types:
+            self._cache_field_types = {}
+            for name, info in FieldType.desc.items():
+                try:
+                    self._cache_field_types[info[0]] = getattr(
+                        self, '_{0}_to_python'.format(name))
+                except AttributeError:
+                    # We ignore field types which has no method
+                    pass
+
+        try:
+            return self._cache_field_types[vtype[1]](value, vtype)
+        except KeyError:
+            # If one type is not defined, we just return the value as str
+            try:
+                return value.decode('utf-8')
+            except UnicodeDecodeError:
+                return value
+        except ValueError as err:
+            raise ValueError("%s (field %s)" % (err, vtype[0]))
+        except TypeError as err:
+            raise TypeError("%s (field %s)" % (err, vtype[0]))
+        except:
+            raise
+
+    def _int_to_mysql(self, value):
+        """Convert value to int"""
+        return int(value)
+
+    def _long_to_mysql(self, value):
+        """Convert value to int"""
+        return int(value)
+
+    def _float_to_mysql(self, value):
+        """Convert value to float"""
+        return float(value)
+
+    def _str_to_mysql(self, value):
+        """Convert value to string"""
+        if PY2:
+            return str(value)
+        return self._unicode_to_mysql(value)
+
+    def _unicode_to_mysql(self, value):
+        """Convert unicode"""
+        charset = self.charset
+        charset_id = self.charset_id
+        if charset == 'binary':
+            charset = 'utf8'
+            charset_id = CharacterSet.get_charset_info(charset)[0]
+        encoded = value.encode(charset)
+        if charset_id in CharacterSet.slash_charsets:
+            if b'\x5c' in encoded:
+                return HexLiteral(value, charset)
+        return encoded
+
+    def _bytes_to_mysql(self, value):
+        """Convert value to bytes"""
+        return value
+
+    def _bytearray_to_mysql(self, value):
+        """Convert value to bytes"""
+        return bytes(value)
+
+    def _bool_to_mysql(self, value):
+        """Convert value to boolean"""
+        if value:
+            return 1
+        return 0
+
+    def _nonetype_to_mysql(self, value):
+        """
+        This would return what None would be in MySQL, but instead we
+        leave it None and return it right away. The actual conversion
+        from None to NULL happens in the quoting functionality.
+
+        Return None.
+        """
+        return None
+
+    def _datetime_to_mysql(self, value):
+        """
+        Converts a datetime instance to a string suitable for MySQL.
+        The returned string has format: %Y-%m-%d %H:%M:%S[.%f]
+
+        If the instance isn't a datetime.datetime type, it return None.
+
+        Returns a bytes.
+        """
+        if value.microsecond:
+            fmt = '{0:04d}-{1:02d}-{2:02d} {3:02d}:{4:02d}:{5:02d}.{6:06d}'
+            return fmt.format(
+                value.year, value.month, value.day,
+                value.hour, value.minute, value.second,
+                value.microsecond).encode('ascii')
+
+        fmt = '{0:04d}-{1:02d}-{2:02d} {3:02d}:{4:02d}:{5:02d}'
+        return fmt.format(
+            value.year, value.month, value.day,
+            value.hour, value.minute, value.second).encode('ascii')
+
+    def _date_to_mysql(self, value):
+        """
+        Converts a date instance to a string suitable for MySQL.
+        The returned string has format: %Y-%m-%d
+
+        If the instance isn't a datetime.date type, it return None.
+
+        Returns a bytes.
+        """
+        return '{0:04d}-{1:02d}-{2:02d}'.format(value.year, value.month,
+                                                value.day).encode('ascii')
+
+    def _time_to_mysql(self, value):
+        """
+        Converts a time instance to a string suitable for MySQL.
+        The returned string has format: %H:%M:%S[.%f]
+
+        If the instance isn't a datetime.time type, it return None.
+
+        Returns a bytes.
+        """
+        if value.microsecond:
+            return value.strftime('%H:%M:%S.%f').encode('ascii')
+        return value.strftime('%H:%M:%S').encode('ascii')
+
+    def _struct_time_to_mysql(self, value):
+        """
+        Converts a time.struct_time sequence to a string suitable
+        for MySQL.
+        The returned string has format: %Y-%m-%d %H:%M:%S
+
+        Returns a bytes or None when not valid.
+        """
+        return time.strftime('%Y-%m-%d %H:%M:%S', value).encode('ascii')
+
+    def _timedelta_to_mysql(self, value):
+        """
+        Converts a timedelta instance to a string suitable for MySQL.
+        The returned string has format: %H:%M:%S
+
+        Returns a bytes.
+        """
+        seconds = abs(value.days * 86400 + value.seconds)
+
+        if value.microseconds:
+            fmt = '{0:02d}:{1:02d}:{2:02d}.{3:06d}'
+            if value.days < 0:
+                mcs = 1000000 - value.microseconds
+                seconds -= 1
+            else:
+                mcs = value.microseconds
+        else:
+            fmt = '{0:02d}:{1:02d}:{2:02d}'
+
+        if value.days < 0:
+            fmt = '-' + fmt
+
+        (hours, remainder) = divmod(seconds, 3600)
+        (mins, secs) = divmod(remainder, 60)
+
+        if value.microseconds:
+            result = fmt.format(hours, mins, secs, mcs)
+        else:
+            result = fmt.format(hours, mins, secs)
+
+        if PY2:
+            return result
+        return result.encode('ascii')
+
+    def _decimal_to_mysql(self, value):
+        """
+        Converts a decimal.Decimal instance to a string suitable for
+        MySQL.
+
+        Returns a bytes or None when not valid.
+        """
+        if isinstance(value, Decimal):
+            return str(value).encode('ascii')
+
+        return None
+
+    def row_to_python(self, row, fields):
+        """Convert a MySQL text result row to Python types
+
+        The row argument is a sequence containing text result returned
+        by a MySQL server. Each value of the row is converted to the
+        using the field type information in the fields argument.
+
+        Returns a tuple.
+        """
+        i = 0
+        result = [None]*len(fields)
+
+        if not self._cache_field_types:
+            self._cache_field_types = {}
+            for name, info in FieldType.desc.items():
+                try:
+                    self._cache_field_types[info[0]] = getattr(
+                        self, '_{0}_to_python'.format(name))
+                except AttributeError:
+                    # We ignore field types which has no method
+                    pass
+
+        for field in fields:
+            field_type = field[1]
+
+            if (row[i] == 0 and field_type != FieldType.BIT) or row[i] is None:
+                # Don't convert NULL value
+                i += 1
+                continue
+
+            try:
+                result[i] = self._cache_field_types[field_type](row[i], field)
+            except KeyError:
+                # If one type is not defined, we just return the value as str
+                try:
+                    result[i] = row[i].decode('utf-8')
+                except UnicodeDecodeError:
+                    result[i] = row[i]
+            except (ValueError, TypeError) as err:
+                err.message = "{0} (field {1})".format(str(err), field[0])
+                raise
+
+            i += 1
+
+        return tuple(result)
+
+    def _FLOAT_to_python(self, value, desc=None):  # pylint: disable=C0103
+        """
+        Returns value as float type.
+        """
+        return float(value)
+
+    _DOUBLE_to_python = _FLOAT_to_python
+
+    def _INT_to_python(self, value, desc=None):  # pylint: disable=C0103
+        """
+        Returns value as int type.
+        """
+        return int(value)
+
+    _TINY_to_python = _INT_to_python
+    _SHORT_to_python = _INT_to_python
+    _INT24_to_python = _INT_to_python
+    _LONG_to_python = _INT_to_python
+    _LONGLONG_to_python = _INT_to_python
+
+    def _DECIMAL_to_python(self, value, desc=None):  # pylint: disable=C0103
+        """
+        Returns value as a decimal.Decimal.
+        """
+        val = value.decode(self.charset)
+        return Decimal(val)
+
+    _NEWDECIMAL_to_python = _DECIMAL_to_python
+
+    def _str(self, value, desc=None):
+        """
+        Returns value as str type.
+        """
+        return str(value)
+
+    def _BIT_to_python(self, value, dsc=None):  # pylint: disable=C0103
+        """Returns BIT columntype as integer"""
+        int_val = value
+        if len(int_val) < 8:
+            int_val = b'\x00' * (8 - len(int_val)) + int_val
+        return struct_unpack('>Q', int_val)[0]
+
+    def _DATE_to_python(self, value, dsc=None):  # pylint: disable=C0103
+        """Converts TIME column MySQL to a python datetime.datetime type.
+
+        Raises ValueError if the value can not be converted.
+
+        Returns DATE column type as datetime.date type.
+        """
+        if isinstance(value, datetime.date):
+            return value
+        try:
+            parts = value.split(b'-')
+            if len(parts) != 3:
+                raise ValueError("invalid datetime format: {} len: {}"
+                                 "".format(parts, len(parts)))
+            try:
+                return datetime.date(int(parts[0]), int(parts[1]), int(parts[2]))
+            except ValueError:
+                return None
+        except (IndexError, ValueError):
+            raise ValueError(
+                "Could not convert {0} to python datetime.timedelta".format(
+                    value))
+
+    _NEWDATE_to_python = _DATE_to_python
+
+    def _TIME_to_python(self, value, dsc=None):  # pylint: disable=C0103
+        """Converts TIME column value to python datetime.time value type.
+
+        Converts the TIME column MySQL type passed as bytes to a python
+        datetime.datetime type.
+
+        Raises ValueError if the value can not be converted.
+
+        Returns datetime.time type.
+        """
+        try:
+            (hms, mcs) = value.split(b'.')
+            mcs = int(mcs.ljust(6, b'0'))
+        except (TypeError, ValueError):
+            hms = value
+            mcs = 0
+        try:
+            (hours, mins, secs) = [int(d) for d in hms.split(b':')]
+            if value[0] == 45 or value[0] == '-':  # if PY3 or PY2
+                mins, secs, mcs = -mins, -secs, -mcs
+            return datetime.timedelta(hours=hours, minutes=mins,
+                                      seconds=secs, microseconds=mcs)
+        except (IndexError, TypeError, ValueError):
+            raise ValueError(CONVERT_ERROR.format(value=value,
+                                                  pytype="datetime.timedelta"))
+
+    def _DATETIME_to_python(self, value, dsc=None):  # pylint: disable=C0103
+        """"Converts DATETIME column value to python datetime.time value type.
+
+        Converts the DATETIME column MySQL type passed as bytes to a python
+        datetime.datetime type.
+
+        Returns: datetime.datetime type.
+        """
+        if isinstance(value, datetime.datetime):
+            return value
+        datetime_val = None
+        try:
+            (date_, time_) = value.split(b' ')
+            if len(time_) > 8:
+                (hms, mcs) = time_.split(b'.')
+                mcs = int(mcs.ljust(6, b'0'))
+            else:
+                hms = time_
+                mcs = 0
+            dtval = [int(i) for i in date_.split(b'-')] + \
+                    [int(i) for i in hms.split(b':')] + [mcs, ]
+            if len(dtval) < 6:
+                raise ValueError("invalid datetime format: {} len: {}"
+                                 "".format(dtval, len(dtval)))
+            else:
+                # Note that by default MySQL accepts invalid timestamps
+                # (this is also backward compatibility).
+                # Traditionaly C/py returns None for this well formed but
+                # invalid datetime for python like '0000-00-00 HH:MM:SS'.
+                try:
+                    datetime_val = datetime.datetime(*dtval)
+                except ValueError:
+                    return None
+        except (IndexError, TypeError):
+            raise ValueError(CONVERT_ERROR.format(value=value,
+                                                  pytype="datetime.timedelta"))
+
+        return datetime_val
+
+    _TIMESTAMP_to_python = _DATETIME_to_python
+
+    def _YEAR_to_python(self, value, desc=None):  # pylint: disable=C0103
+        """Returns YEAR column type as integer"""
+        try:
+            year = int(value)
+        except ValueError:
+            raise ValueError("Failed converting YEAR to int (%s)" % value)
+
+        return year
+
+    def _SET_to_python(self, value, dsc=None):  # pylint: disable=C0103
+        """Returns SET column type as set
+
+        Actually, MySQL protocol sees a SET as a string type field. So this
+        code isn't called directly, but used by STRING_to_python() method.
+
+        Returns SET column type as a set.
+        """
+        set_type = None
+        val = value.decode(self.charset)
+        if not val:
+            return set()
+        try:
+            set_type = set(val.split(','))
+        except ValueError:
+            raise ValueError("Could not convert set %s to a sequence." % value)
+        return set_type
+
+    def _STRING_to_python(self, value, dsc=None):  # pylint: disable=C0103
+        """
+        Note that a SET is a string too, but using the FieldFlag we can see
+        whether we have to split it.
+
+        Returns string typed columns as string type.
+        """
+        if dsc is not None:
+            # Check if we deal with a SET
+            if dsc[7] & FieldFlag.SET:
+                return self._SET_to_python(value, dsc)
+            if dsc[7] & FieldFlag.BINARY:
+                if self.charset != 'binary' and not isinstance(value, str):
+                    try:
+                        return value.decode(self.charset)
+                    except (LookupError, UnicodeDecodeError):
+                        return value
+                else:
+                    return value
+
+        if self.charset == 'binary':
+            return value
+        if isinstance(value, (bytes, bytearray)) and self.use_unicode:
+            return value.decode(self.charset)
+
+        return value
+
+    _VAR_STRING_to_python = _STRING_to_python
+    _JSON_to_python = _STRING_to_python
+
+    def _BLOB_to_python(self, value, dsc=None):  # pylint: disable=C0103
+        """Convert BLOB data type to Python."""
+        if dsc is not None:
+            if dsc[7] & FieldFlag.BLOB and dsc[7] & FieldFlag.BINARY:
+                return bytes(value)
+        return self._STRING_to_python(value, dsc)
+
+    _LONG_BLOB_to_python = _BLOB_to_python
+    _MEDIUM_BLOB_to_python = _BLOB_to_python
+    _TINY_BLOB_to_python = _BLOB_to_python
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/cursor.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/cursor.py
new file mode 100644
index 0000000..c9a0aaa
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/cursor.py
@@ -0,0 +1,1435 @@
+# Copyright (c) 2009, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Cursor classes
+"""
+
+from collections import namedtuple
+import re
+import weakref
+
+from . import errors
+from .abstracts import MySQLCursorAbstract, NAMED_TUPLE_CACHE
+from .catch23 import PY2
+from .constants import ServerFlag
+
+SQL_COMMENT = r"\/\*.*?\*\/"
+RE_SQL_COMMENT = re.compile(
+    r'''({0})|(["'`][^"'`]*?({0})[^"'`]*?["'`])'''.format(SQL_COMMENT),
+    re.I | re.M | re.S)
+RE_SQL_ON_DUPLICATE = re.compile(
+    r'''\s*ON\s+DUPLICATE\s+KEY(?:[^"'`]*["'`][^"'`]*["'`])*[^"'`]*$''',
+    re.I | re.M | re.S)
+RE_SQL_INSERT_STMT = re.compile(
+    r"({0}|\s)*INSERT({0}|\s)*INTO\s+[`'\"]?.+[`'\"]?(?:\.[`'\"]?.+[`'\"]?)"
+    r"{{0,2}}\s+VALUES\s*\(.+(?:\s*,.+)*\)".format(SQL_COMMENT),
+    re.I | re.M | re.S)
+RE_SQL_INSERT_VALUES = re.compile(r'.*VALUES\s*(\(.*\)).*', re.I | re.M | re.S)
+RE_PY_PARAM = re.compile(b'(%s)')
+RE_PY_MAPPING_PARAM = re.compile(
+    br'''
+    %
+    \((?P<mapping_key>[^)]+)\)
+    (?P<conversion_type>[diouxXeEfFgGcrs%])
+    ''',
+    re.X
+)
+RE_SQL_SPLIT_STMTS = re.compile(
+    b''';(?=(?:[^"'`]*["'`][^"'`]*["'`])*[^"'`]*$)''')
+RE_SQL_FIND_PARAM = re.compile(
+    b'''%s(?=(?:[^"'`]*["'`][^"'`]*["'`])*[^"'`]*$)''')
+
+ERR_NO_RESULT_TO_FETCH = "No result set to fetch from"
+
+MAX_RESULTS = 4294967295
+
+class _ParamSubstitutor(object):
+    """
+    Substitutes parameters into SQL statement.
+    """
+    def __init__(self, params):
+        self.params = params
+        self.index = 0
+
+    def __call__(self, matchobj):
+        index = self.index
+        self.index += 1
+        try:
+            return bytes(self.params[index])
+        except IndexError:
+            raise errors.ProgrammingError(
+                "Not enough parameters for the SQL statement")
+
+    @property
+    def remaining(self):
+        """Returns number of parameters remaining to be substituted"""
+        return len(self.params) - self.index
+
+
+def _bytestr_format_dict(bytestr, value_dict):
+    """
+    >>> _bytestr_format_dict(b'%(a)s', {b'a': b'foobar'})
+    b'foobar
+    >>> _bytestr_format_dict(b'%%(a)s', {b'a': b'foobar'})
+    b'%%(a)s'
+    >>> _bytestr_format_dict(b'%%%(a)s', {b'a': b'foobar'})
+    b'%%foobar'
+    >>> _bytestr_format_dict(b'%(x)s %(y)s',
+    ...                      {b'x': b'x=%(y)s', b'y': b'y=%(x)s'})
+    b'x=%(y)s y=%(x)s'
+    """
+    def replace(matchobj):
+        """Replace pattern."""
+        value = None
+        groups = matchobj.groupdict()
+        if groups["conversion_type"] == b"%":
+            value = b"%"
+        if groups["conversion_type"] == b"s":
+            key = groups["mapping_key"]
+            value = value_dict[key]
+        if value is None:
+            raise ValueError("Unsupported conversion_type: {0}"
+                             "".format(groups["conversion_type"]))
+        return bytes(value) if PY2 else value
+
+    stmt = RE_PY_MAPPING_PARAM.sub(replace, bytestr)
+    if PY2:
+        try:
+            return stmt.decode("utf-8")
+        except UnicodeDecodeError:
+            pass
+    return stmt
+
+
+class CursorBase(MySQLCursorAbstract):
+    """
+    Base for defining MySQLCursor. This class is a skeleton and defines
+    methods and members as required for the Python Database API
+    Specification v2.0.
+
+    It's better to inherite from MySQLCursor.
+    """
+
+    _raw = False
+
+    def __init__(self):
+        self._description = None
+        self._rowcount = -1
+        self._last_insert_id = None
+        self.arraysize = 1
+        super(CursorBase, self).__init__()
+
+    def callproc(self, procname, args=()):
+        """Calls a stored procedue with the given arguments
+
+        The arguments will be set during this session, meaning
+        they will be called like  _<procname>__arg<nr> where
+        <nr> is an enumeration (+1) of the arguments.
+
+        Coding Example:
+          1) Definining the Stored Routine in MySQL:
+          CREATE PROCEDURE multiply(IN pFac1 INT, IN pFac2 INT, OUT pProd INT)
+          BEGIN
+            SET pProd := pFac1 * pFac2;
+          END
+
+          2) Executing in Python:
+          args = (5,5,0) # 0 is to hold pprod
+          cursor.callproc('multiply', args)
+          print(cursor.fetchone())
+
+        Does not return a value, but a result set will be
+        available when the CALL-statement execute successfully.
+        Raises exceptions when something is wrong.
+        """
+        pass
+
+    def close(self):
+        """Close the cursor."""
+        pass
+
+    def execute(self, operation, params=(), multi=False):
+        """Executes the given operation
+
+        Executes the given operation substituting any markers with
+        the given parameters.
+
+        For example, getting all rows where id is 5:
+          cursor.execute("SELECT * FROM t1 WHERE id = %s", (5,))
+
+        The multi argument should be set to True when executing multiple
+        statements in one operation. If not set and multiple results are
+        found, an InterfaceError will be raised.
+
+        If warnings where generated, and connection.get_warnings is True, then
+        self._warnings will be a list containing these warnings.
+
+        Returns an iterator when multi is True, otherwise None.
+        """
+        pass
+
+    def executemany(self, operation, seq_params):
+        """Execute the given operation multiple times
+
+        The executemany() method will execute the operation iterating
+        over the list of parameters in seq_params.
+
+        Example: Inserting 3 new employees and their phone number
+
+        data = [
+            ('Jane','555-001'),
+            ('Joe', '555-001'),
+            ('John', '555-003')
+            ]
+        stmt = "INSERT INTO employees (name, phone) VALUES ('%s','%s')"
+        cursor.executemany(stmt, data)
+
+        INSERT statements are optimized by batching the data, that is
+        using the MySQL multiple rows syntax.
+
+        Results are discarded. If they are needed, consider looping over
+        data using the execute() method.
+        """
+        pass
+
+    def fetchone(self):
+        """Returns next row of a query result set
+
+        Returns a tuple or None.
+        """
+        pass
+
+    def fetchmany(self, size=1):
+        """Returns the next set of rows of a query result, returning a
+        list of tuples. When no more rows are available, it returns an
+        empty list.
+
+        The number of rows returned can be specified using the size argument,
+        which defaults to one
+        """
+        pass
+
+    def fetchall(self):
+        """Returns all rows of a query result set
+
+        Returns a list of tuples.
+        """
+        pass
+
+    def nextset(self):
+        """Not Implemented."""
+        pass
+
+    def setinputsizes(self, sizes):
+        """Not Implemented."""
+        pass
+
+    def setoutputsize(self, size, column=None):
+        """Not Implemented."""
+        pass
+
+    def reset(self, free=True):
+        """Reset the cursor to default"""
+        pass
+
+    @property
+    def description(self):
+        """Returns description of columns in a result
+
+        This property returns a list of tuples describing the columns in
+        in a result set. A tuple is described as follows::
+
+                (column_name,
+                 type,
+                 None,
+                 None,
+                 None,
+                 None,
+                 null_ok,
+                 column_flags)  # Addition to PEP-249 specs
+
+        Returns a list of tuples.
+        """
+        return self._description
+
+    @property
+    def rowcount(self):
+        """Returns the number of rows produced or affected
+
+        This property returns the number of rows produced by queries
+        such as a SELECT, or affected rows when executing DML statements
+        like INSERT or UPDATE.
+
+        Note that for non-buffered cursors it is impossible to know the
+        number of rows produced before having fetched them all. For those,
+        the number of rows will be -1 right after execution, and
+        incremented when fetching rows.
+
+        Returns an integer.
+        """
+        return self._rowcount
+
+    @property
+    def lastrowid(self):
+        """Returns the value generated for an AUTO_INCREMENT column
+
+        Returns the value generated for an AUTO_INCREMENT column by
+        the previous INSERT or UPDATE statement or None when there is
+        no such value available.
+
+        Returns a long value or None.
+        """
+        return self._last_insert_id
+
+
+class MySQLCursor(CursorBase):
+    """Default cursor for interacting with MySQL
+
+    This cursor will execute statements and handle the result. It will
+    not automatically fetch all rows.
+
+    MySQLCursor should be inherited whenever other functionallity is
+    required. An example would to change the fetch* member functions
+    to return dictionaries instead of lists of values.
+
+    Implements the Python Database API Specification v2.0 (PEP-249)
+    """
+    def __init__(self, connection=None):
+        CursorBase.__init__(self)
+        self._connection = None
+        self._stored_results = []
+        self._nextrow = (None, None)
+        self._warnings = None
+        self._warning_count = 0
+        self._executed = None
+        self._executed_list = []
+        self._binary = False
+
+        if connection is not None:
+            self._set_connection(connection)
+
+    def __iter__(self):
+        """
+        Iteration over the result set which calls self.fetchone()
+        and returns the next row.
+        """
+        return iter(self.fetchone, None)
+
+    def _set_connection(self, connection):
+        """Set the connection"""
+        try:
+            self._connection = weakref.proxy(connection)
+            self._connection.is_connected()
+        except (AttributeError, TypeError):
+            raise errors.InterfaceError(errno=2048)
+
+    def _reset_result(self):
+        """Reset the cursor to default"""
+        self._rowcount = -1
+        self._nextrow = (None, None)
+        self._stored_results = []
+        self._warnings = None
+        self._warning_count = 0
+        self._description = None
+        self._executed = None
+        self._executed_list = []
+        self.reset()
+
+    def _have_unread_result(self):
+        """Check whether there is an unread result"""
+        try:
+            return self._connection.unread_result
+        except AttributeError:
+            return False
+
+    def next(self):
+        """Used for iterating over the result set."""
+        return self.__next__()
+
+    def __next__(self):
+        """
+        Used for iterating over the result set. Calles self.fetchone()
+        to get the next row.
+        """
+        try:
+            row = self.fetchone()
+        except errors.InterfaceError:
+            raise StopIteration
+        if not row:
+            raise StopIteration
+        return row
+
+    def close(self):
+        """Close the cursor
+
+        Returns True when successful, otherwise False.
+        """
+        if self._connection is None:
+            return False
+
+        self._connection.handle_unread_result()
+        self._reset_result()
+        self._connection = None
+
+        return True
+
+    def _process_params_dict(self, params):
+        """Process query parameters given as dictionary"""
+        try:
+            to_mysql = self._connection.converter.to_mysql
+            escape = self._connection.converter.escape
+            quote = self._connection.converter.quote
+            res = {}
+            for key, value in list(params.items()):
+                conv = value
+                conv = to_mysql(conv)
+                conv = escape(conv)
+                conv = quote(conv)
+                if PY2:
+                    res[key] = conv
+                else:
+                    res[key.encode()] = conv
+        except Exception as err:
+            raise errors.ProgrammingError(
+                "Failed processing pyformat-parameters; %s" % err)
+        else:
+            return res
+
+    def _process_params(self, params):
+        """Process query parameters."""
+        try:
+            res = params
+
+            to_mysql = self._connection.converter.to_mysql
+            escape = self._connection.converter.escape
+            quote = self._connection.converter.quote
+
+            res = [to_mysql(i) for i in res]
+            res = [escape(i) for i in res]
+            res = [quote(i) for i in res]
+        except Exception as err:
+            raise errors.ProgrammingError(
+                "Failed processing format-parameters; %s" % err)
+        else:
+            return tuple(res)
+
+    def _handle_noresultset(self, res):
+        """Handles result of execute() when there is no result set
+        """
+        try:
+            self._rowcount = res['affected_rows']
+            self._last_insert_id = res['insert_id']
+            self._warning_count = res['warning_count']
+        except (KeyError, TypeError) as err:
+            raise errors.ProgrammingError(
+                "Failed handling non-resultset; {0}".format(err))
+
+        self._handle_warnings()
+        if self._connection.raise_on_warnings is True and self._warnings:
+            raise errors.get_mysql_exception(
+                self._warnings[0][1], self._warnings[0][2])
+
+    def _handle_resultset(self):
+        """Handles result set
+
+        This method handles the result set and is called after reading
+        and storing column information in _handle_result(). For non-buffering
+        cursors, this method is usually doing nothing.
+        """
+        pass
+
+    def _handle_result(self, result):
+        """
+        Handle the result after a command was send. The result can be either
+        an OK-packet or a dictionary containing column/eof information.
+
+        Raises InterfaceError when result is not a dict() or result is
+        invalid.
+        """
+        if not isinstance(result, dict):
+            raise errors.InterfaceError('Result was not a dict()')
+
+        if 'columns' in result:
+            # Weak test, must be column/eof information
+            self._description = result['columns']
+            self._connection.unread_result = True
+            self._handle_resultset()
+        elif 'affected_rows' in result:
+            # Weak test, must be an OK-packet
+            self._connection.unread_result = False
+            self._handle_noresultset(result)
+        else:
+            raise errors.InterfaceError('Invalid result')
+
+    def _execute_iter(self, query_iter):
+        """Generator returns MySQLCursor objects for multiple statements
+
+        This method is only used when multiple statements are executed
+        by the execute() method. It uses zip() to make an iterator from the
+        given query_iter (result of MySQLConnection.cmd_query_iter()) and
+        the list of statements that were executed.
+        """
+        executed_list = RE_SQL_SPLIT_STMTS.split(self._executed)
+
+        i = 0
+        while True:
+            try:
+                result = next(query_iter)
+                self._reset_result()
+                self._handle_result(result)
+                try:
+                    self._executed = executed_list[i].strip()
+                    i += 1
+                except IndexError:
+                    self._executed = executed_list[0]
+
+                yield self
+            except StopIteration:
+                return
+
+    def execute(self, operation, params=None, multi=False):
+        """Executes the given operation
+
+        Executes the given operation substituting any markers with
+        the given parameters.
+
+        For example, getting all rows where id is 5:
+          cursor.execute("SELECT * FROM t1 WHERE id = %s", (5,))
+
+        The multi argument should be set to True when executing multiple
+        statements in one operation. If not set and multiple results are
+        found, an InterfaceError will be raised.
+
+        If warnings where generated, and connection.get_warnings is True, then
+        self._warnings will be a list containing these warnings.
+
+        Returns an iterator when multi is True, otherwise None.
+        """
+        if not operation:
+            return None
+
+        if not self._connection:
+            raise errors.ProgrammingError("Cursor is not connected")
+
+        self._connection.handle_unread_result()
+
+        self._reset_result()
+        stmt = ''
+
+        try:
+            if not isinstance(operation, (bytes, bytearray)):
+                stmt = operation.encode(self._connection.python_charset)
+            else:
+                stmt = operation
+        except (UnicodeDecodeError, UnicodeEncodeError) as err:
+            raise errors.ProgrammingError(str(err))
+
+        if params:
+            if isinstance(params, dict):
+                stmt = _bytestr_format_dict(
+                    stmt, self._process_params_dict(params))
+            elif isinstance(params, (list, tuple)):
+                psub = _ParamSubstitutor(self._process_params(params))
+                stmt = RE_PY_PARAM.sub(psub, stmt)
+                if psub.remaining != 0:
+                    raise errors.ProgrammingError(
+                        "Not all parameters were used in the SQL statement")
+
+        self._executed = stmt
+        if multi:
+            self._executed_list = []
+            return self._execute_iter(self._connection.cmd_query_iter(stmt))
+
+        try:
+            self._handle_result(self._connection.cmd_query(stmt))
+        except errors.InterfaceError:
+            if self._connection._have_next_result:  # pylint: disable=W0212
+                raise errors.InterfaceError(
+                    "Use multi=True when executing multiple statements")
+            raise
+        return None
+
+    def _batch_insert(self, operation, seq_params):
+        """Implements multi row insert"""
+        def remove_comments(match):
+            """Remove comments from INSERT statements.
+
+            This function is used while removing comments from INSERT
+            statements. If the matched string is a comment not enclosed
+            by quotes, it returns an empty string, else the string itself.
+            """
+            if match.group(1):
+                return ""
+            return match.group(2)
+
+        tmp = re.sub(RE_SQL_ON_DUPLICATE, '',
+                     re.sub(RE_SQL_COMMENT, remove_comments, operation))
+
+        matches = re.search(RE_SQL_INSERT_VALUES, tmp)
+        if not matches:
+            raise errors.InterfaceError(
+                "Failed rewriting statement for multi-row INSERT. "
+                "Check SQL syntax."
+            )
+        fmt = matches.group(1).encode(self._connection.python_charset)
+        values = []
+
+        try:
+            stmt = operation.encode(self._connection.python_charset)
+            for params in seq_params:
+                tmp = fmt
+                if isinstance(params, dict):
+                    tmp = _bytestr_format_dict(
+                        tmp, self._process_params_dict(params))
+                else:
+                    psub = _ParamSubstitutor(self._process_params(params))
+                    tmp = RE_PY_PARAM.sub(psub, tmp)
+                    if psub.remaining != 0:
+                        raise errors.ProgrammingError(
+                            "Not all parameters were used in the SQL statement")
+                    #for p in self._process_params(params):
+                    #    tmp = tmp.replace(b'%s',p,1)
+                values.append(tmp)
+            if fmt in stmt:
+                stmt = stmt.replace(fmt, b','.join(values), 1)
+                self._executed = stmt
+                return stmt
+            return None
+        except (UnicodeDecodeError, UnicodeEncodeError) as err:
+            raise errors.ProgrammingError(str(err))
+        except errors.Error:
+            raise
+        except Exception as err:
+            raise errors.InterfaceError(
+                "Failed executing the operation; %s" % err)
+
+    def executemany(self, operation, seq_params):
+        """Execute the given operation multiple times
+
+        The executemany() method will execute the operation iterating
+        over the list of parameters in seq_params.
+
+        Example: Inserting 3 new employees and their phone number
+
+        data = [
+            ('Jane','555-001'),
+            ('Joe', '555-001'),
+            ('John', '555-003')
+            ]
+        stmt = "INSERT INTO employees (name, phone) VALUES ('%s','%s)"
+        cursor.executemany(stmt, data)
+
+        INSERT statements are optimized by batching the data, that is
+        using the MySQL multiple rows syntax.
+
+        Results are discarded. If they are needed, consider looping over
+        data using the execute() method.
+        """
+        if not operation or not seq_params:
+            return None
+        self._connection.handle_unread_result()
+
+        try:
+            _ = iter(seq_params)
+        except TypeError:
+            raise errors.ProgrammingError(
+                "Parameters for query must be an Iterable.")
+
+        # Optimize INSERTs by batching them
+        if re.match(RE_SQL_INSERT_STMT, operation):
+            if not seq_params:
+                self._rowcount = 0
+                return None
+            stmt = self._batch_insert(operation, seq_params)
+            if stmt is not None:
+                return self.execute(stmt)
+
+        rowcnt = 0
+        try:
+            for params in seq_params:
+                self.execute(operation, params)
+                if self.with_rows and self._have_unread_result():
+                    self.fetchall()
+                rowcnt += self._rowcount
+        except (ValueError, TypeError) as err:
+            raise errors.InterfaceError(
+                "Failed executing the operation; {0}".format(err))
+        except:
+            # Raise whatever execute() raises
+            raise
+        self._rowcount = rowcnt
+        return None
+
+    def stored_results(self):
+        """Returns an iterator for stored results
+
+        This method returns an iterator over results which are stored when
+        callproc() is called. The iterator will provide MySQLCursorBuffered
+        instances.
+
+        Returns a iterator.
+        """
+        return iter(self._stored_results)
+
+    def callproc(self, procname, args=()):
+        """Calls a stored procedure with the given arguments
+
+        The arguments will be set during this session, meaning
+        they will be called like  _<procname>__arg<nr> where
+        <nr> is an enumeration (+1) of the arguments.
+
+        Coding Example:
+          1) Defining the Stored Routine in MySQL:
+          CREATE PROCEDURE multiply(IN pFac1 INT, IN pFac2 INT, OUT pProd INT)
+          BEGIN
+            SET pProd := pFac1 * pFac2;
+          END
+
+          2) Executing in Python:
+          args = (5, 5, 0)  # 0 is to hold pprod
+          cursor.callproc('multiply', args)
+          print(cursor.fetchone())
+
+        For OUT and INOUT parameters the user should provide the
+        type of the parameter as well. The argument should be a
+        tuple with first item as the value of the parameter to pass
+        and second argument the type of the argument.
+
+        In the above example, one can call callproc method like:
+          args = (5, 5, (0, 'INT'))
+          cursor.callproc('multiply', args)
+
+        The type of the argument given in the tuple will be used by
+        the MySQL CAST function to convert the values in the corresponding
+        MySQL type (See CAST in MySQL Reference for more information)
+
+        Does not return a value, but a result set will be
+        available when the CALL-statement execute successfully.
+        Raises exceptions when something is wrong.
+        """
+        if not procname or not isinstance(procname, str):
+            raise ValueError("procname must be a string")
+
+        if not isinstance(args, (tuple, list)):
+            raise ValueError("args must be a sequence")
+
+        argfmt = "@_{name}_arg{index}"
+        self._stored_results = []
+
+        results = []
+        try:
+            argnames = []
+            argtypes = []
+            if args:
+                for idx, arg in enumerate(args):
+                    argname = argfmt.format(name=procname, index=idx + 1)
+                    argnames.append(argname)
+                    if isinstance(arg, tuple):
+                        argtypes.append(" CAST({0} AS {1})".format(argname,
+                                                                   arg[1]))
+                        self.execute("SET {0}=%s".format(argname), (arg[0],))
+                    else:
+                        argtypes.append(argname)
+                        self.execute("SET {0}=%s".format(argname), (arg,))
+
+            call = "CALL {0}({1})".format(procname, ','.join(argnames))
+
+            # pylint: disable=W0212
+            # We disable consuming results temporary to make sure we
+            # getting all results
+            can_consume_results = self._connection._consume_results
+            for result in self._connection.cmd_query_iter(call):
+                self._connection._consume_results = False
+                if self._raw:
+                    tmp = MySQLCursorBufferedRaw(self._connection._get_self())
+                else:
+                    tmp = MySQLCursorBuffered(self._connection._get_self())
+                tmp._executed = "(a result of {0})".format(call)
+                tmp._handle_result(result)
+                if tmp._warnings is not None:
+                    self._warnings = tmp._warnings
+                if 'columns' in result:
+                    results.append(tmp)
+            self._connection._consume_results = can_consume_results
+            # pylint: enable=W0212
+
+            if argnames:
+                select = "SELECT {0}".format(','.join(argtypes))
+                self.execute(select)
+                self._stored_results = results
+                return self.fetchone()
+
+            self._stored_results = results
+            return ()
+
+        except errors.Error:
+            raise
+        except Exception as err:
+            raise errors.InterfaceError(
+                "Failed calling stored routine; {0}".format(err))
+
+    def getlastrowid(self):
+        """Returns the value generated for an AUTO_INCREMENT column
+
+        Returns the value generated for an AUTO_INCREMENT column by
+        the previous INSERT or UPDATE statement.
+
+        Returns a long value or None.
+        """
+        return self._last_insert_id
+
+    def _fetch_warnings(self):
+        """
+        Fetch warnings doing a SHOW WARNINGS. Can be called after getting
+        the result.
+
+        Returns a result set or None when there were no warnings.
+        """
+        res = []
+        try:
+            cur = self._connection.cursor(raw=False)
+            cur.execute("SHOW WARNINGS")
+            res = cur.fetchall()
+            cur.close()
+        except Exception as err:
+            raise errors.InterfaceError(
+                "Failed getting warnings; %s" % err)
+
+        if res:
+            return res
+
+        return None
+
+    def _handle_warnings(self):
+        """Handle possible warnings after all results are consumed"""
+        if self._connection.get_warnings is True and self._warning_count:
+            self._warnings = self._fetch_warnings()
+
+    def _handle_eof(self, eof):
+        """Handle EOF packet"""
+        self._connection.unread_result = False
+        self._nextrow = (None, None)
+        self._warning_count = eof['warning_count']
+        self._handle_warnings()
+        if self._connection.raise_on_warnings is True and self._warnings:
+            raise errors.get_mysql_exception(
+                self._warnings[0][1], self._warnings[0][2])
+
+    def _fetch_row(self, raw=False):
+        """Returns the next row in the result set
+
+        Returns a tuple or None.
+        """
+        if not self._have_unread_result():
+            return None
+        row = None
+
+        if self._nextrow == (None, None):
+            (row, eof) = self._connection.get_row(
+                binary=self._binary, columns=self.description, raw=raw)
+        else:
+            (row, eof) = self._nextrow
+
+        if row:
+            self._nextrow = self._connection.get_row(
+                binary=self._binary, columns=self.description, raw=raw)
+            eof = self._nextrow[1]
+            if eof is not None:
+                self._handle_eof(eof)
+            if self._rowcount == -1:
+                self._rowcount = 1
+            else:
+                self._rowcount += 1
+        if eof:
+            self._handle_eof(eof)
+
+        return row
+
+    def fetchone(self):
+        """Returns next row of a query result set
+
+        Returns a tuple or None.
+        """
+        row = self._fetch_row()
+        if row:
+            return row
+        return None
+
+    def fetchmany(self, size=None):
+        res = []
+        cnt = (size or self.arraysize)
+        while cnt > 0 and self._have_unread_result():
+            cnt -= 1
+            row = self.fetchone()
+            if row:
+                res.append(row)
+        return res
+
+    def fetchall(self):
+        if not self._have_unread_result():
+            raise errors.InterfaceError("No result set to fetch from.")
+        (rows, eof) = self._connection.get_rows()
+        if self._nextrow[0]:
+            rows.insert(0, self._nextrow[0])
+
+        self._handle_eof(eof)
+        rowcount = len(rows)
+        if rowcount >= 0 and self._rowcount == -1:
+            self._rowcount = 0
+        self._rowcount += rowcount
+        return rows
+
+    @property
+    def column_names(self):
+        """Returns column names
+
+        This property returns the columns names as a tuple.
+
+        Returns a tuple.
+        """
+        if not self.description:
+            return ()
+        return tuple([d[0] for d in self.description])
+
+    @property
+    def statement(self):
+        """Returns the executed statement
+
+        This property returns the executed statement. When multiple
+        statements were executed, the current statement in the iterator
+        will be returned.
+        """
+        if self._executed is None:
+            return None
+        try:
+            return self._executed.strip().decode('utf-8')
+        except (AttributeError, UnicodeDecodeError):
+            return self._executed.strip()
+
+    @property
+    def with_rows(self):
+        """Returns whether the cursor could have rows returned
+
+        This property returns True when column descriptions are available
+        and possibly also rows, which will need to be fetched.
+
+        Returns True or False.
+        """
+        if not self.description:
+            return False
+        return True
+
+    def __str__(self):
+        fmt = "{class_name}: {stmt}"
+        if self._executed:
+            try:
+                executed = self._executed.decode('utf-8')
+            except AttributeError:
+                executed = self._executed
+            if len(executed) > 40:
+                executed = executed[:40] + '..'
+        else:
+            executed = '(Nothing executed yet)'
+        return fmt.format(class_name=self.__class__.__name__, stmt=executed)
+
+
+class MySQLCursorBuffered(MySQLCursor):
+    """Cursor which fetches rows within execute()"""
+
+    def __init__(self, connection=None):
+        MySQLCursor.__init__(self, connection)
+        self._rows = None
+        self._next_row = 0
+
+    def _handle_resultset(self):
+        (self._rows, eof) = self._connection.get_rows()
+        self._rowcount = len(self._rows)
+        self._handle_eof(eof)
+        self._next_row = 0
+        try:
+            self._connection.unread_result = False
+        except:
+            pass
+
+    def reset(self, free=True):
+        self._rows = None
+
+    def _fetch_row(self, raw=False):
+        row = None
+        try:
+            row = self._rows[self._next_row]
+        except:
+            return None
+        else:
+            self._next_row += 1
+            return row
+        return None
+
+    def fetchone(self):
+        """Returns next row of a query result set
+
+        Returns a tuple or None.
+        """
+        row = self._fetch_row()
+        if row:
+            return row
+        return None
+
+    def fetchall(self):
+        if self._rows is None:
+            raise errors.InterfaceError("No result set to fetch from.")
+        res = []
+        res = self._rows[self._next_row:]
+        self._next_row = len(self._rows)
+        return res
+
+    def fetchmany(self, size=None):
+        res = []
+        cnt = (size or self.arraysize)
+        while cnt > 0:
+            cnt -= 1
+            row = self.fetchone()
+            if row:
+                res.append(row)
+
+        return res
+
+    @property
+    def with_rows(self):
+        return self._rows is not None
+
+
+class MySQLCursorRaw(MySQLCursor):
+    """
+    Skips conversion from MySQL datatypes to Python types when fetching rows.
+    """
+
+    _raw = True
+
+    def fetchone(self):
+        row = self._fetch_row(raw=True)
+
+        if row:
+            return row
+        return None
+
+    def fetchall(self):
+        if not self._have_unread_result():
+            raise errors.InterfaceError("No result set to fetch from.")
+        (rows, eof) = self._connection.get_rows(raw=True)
+        if self._nextrow[0]:
+            rows.insert(0, self._nextrow[0])
+        self._handle_eof(eof)
+        rowcount = len(rows)
+        if rowcount >= 0 and self._rowcount == -1:
+            self._rowcount = 0
+        self._rowcount += rowcount
+        return rows
+
+
+class MySQLCursorBufferedRaw(MySQLCursorBuffered):
+    """
+    Cursor which skips conversion from MySQL datatypes to Python types when
+    fetching rows and fetches rows within execute().
+    """
+
+    _raw = True
+
+    def _handle_resultset(self):
+        (self._rows, eof) = self._connection.get_rows(raw=self._raw)
+        self._rowcount = len(self._rows)
+        self._handle_eof(eof)
+        self._next_row = 0
+        try:
+            self._connection.unread_result = False
+        except:
+            pass
+
+    def fetchone(self):
+        row = self._fetch_row()
+        if row:
+            return row
+        return None
+
+    def fetchall(self):
+        if self._rows is None:
+            raise errors.InterfaceError("No result set to fetch from.")
+        return [r for r in self._rows[self._next_row:]]
+
+    @property
+    def with_rows(self):
+        return self._rows is not None
+
+
+class MySQLCursorPrepared(MySQLCursor):
+    """Cursor using MySQL Prepared Statements
+    """
+    def __init__(self, connection=None):
+        super(MySQLCursorPrepared, self).__init__(connection)
+        self._rows = None
+        self._next_row = 0
+        self._prepared = None
+        self._binary = True
+        self._have_result = None
+        self._last_row_sent = False
+        self._cursor_exists = False
+
+    def reset(self, free=True):
+        if self._prepared:
+            try:
+                self._connection.cmd_stmt_close(self._prepared['statement_id'])
+            except errors.Error:
+                # We tried to deallocate, but it's OK when we fail.
+                pass
+            self._prepared = None
+        self._last_row_sent = False
+        self._cursor_exists = False
+
+    def _handle_noresultset(self, res):
+        self._handle_server_status(res.get('status_flag',
+                                           res.get('server_status', 0)))
+        super(MySQLCursorPrepared, self)._handle_noresultset(res)
+
+    def _handle_server_status(self, flags):
+        """Check for SERVER_STATUS_CURSOR_EXISTS and
+           SERVER_STATUS_LAST_ROW_SENT flags set by the server.
+        """
+        self._cursor_exists = flags & ServerFlag.STATUS_CURSOR_EXISTS != 0
+        self._last_row_sent = flags & ServerFlag.STATUS_LAST_ROW_SENT != 0
+
+    def _handle_eof(self, eof):
+        self._handle_server_status(eof.get('status_flag',
+                                           eof.get('server_status', 0)))
+        super(MySQLCursorPrepared, self)._handle_eof(eof)
+
+    def callproc(self, procname, args=()):
+        """Calls a stored procedue
+
+        Not supported with MySQLCursorPrepared.
+        """
+        raise errors.NotSupportedError()
+
+    def close(self):
+        """Close the cursor
+
+        This method will try to deallocate the prepared statement and close
+        the cursor.
+        """
+        self.reset()
+        super(MySQLCursorPrepared, self).close()
+
+    def _row_to_python(self, rowdata, desc=None):
+        """Convert row data from MySQL to Python types
+
+        The conversion is done while reading binary data in the
+        protocol module.
+        """
+        pass
+
+    def _handle_result(self, result):
+        """Handle result after execution"""
+        if isinstance(result, dict):
+            self._connection.unread_result = False
+            self._have_result = False
+            self._handle_noresultset(result)
+        else:
+            self._description = result[1]
+            self._connection.unread_result = True
+            self._have_result = True
+
+            if 'status_flag' in result[2]:
+                self._handle_server_status(result[2]['status_flag'])
+            elif 'server_status' in result[2]:
+                self._handle_server_status(result[2]['server_status'])
+
+    def execute(self, operation, params=(), multi=False):  # multi is unused
+        """Prepare and execute a MySQL Prepared Statement
+
+        This method will preare the given operation and execute it using
+        the optionally given parameters.
+
+        If the cursor instance already had a prepared statement, it is
+        first closed.
+        """
+        if operation is not self._executed:
+            if self._prepared:
+                self._connection.cmd_stmt_close(self._prepared['statement_id'])
+
+            self._executed = operation
+            try:
+                if not isinstance(operation, bytes):
+                    charset = self._connection.charset
+                    if charset == 'utf8mb4':
+                        charset = 'utf8'
+                    operation = operation.encode(charset)
+            except (UnicodeDecodeError, UnicodeEncodeError) as err:
+                raise errors.ProgrammingError(str(err))
+
+            # need to convert %s to ? before sending it to MySQL
+            if b'%s' in operation:
+                operation = re.sub(RE_SQL_FIND_PARAM, b'?', operation)
+
+            try:
+                self._prepared = self._connection.cmd_stmt_prepare(operation)
+            except errors.Error:
+                self._executed = None
+                raise
+
+        self._connection.cmd_stmt_reset(self._prepared['statement_id'])
+
+        if self._prepared['parameters'] and not params:
+            return
+        elif len(self._prepared['parameters']) != len(params):
+            raise errors.ProgrammingError(
+                errno=1210,
+                msg="Incorrect number of arguments " \
+                    "executing prepared statement")
+
+        res = self._connection.cmd_stmt_execute(
+            self._prepared['statement_id'],
+            data=params,
+            parameters=self._prepared['parameters'])
+        self._handle_result(res)
+
+    def executemany(self, operation, seq_params):
+        """Prepare and execute a MySQL Prepared Statement many times
+
+        This method will prepare the given operation and execute with each
+        tuple found the list seq_params.
+
+        If the cursor instance already had a prepared statement, it is
+        first closed.
+
+        executemany() simply calls execute().
+        """
+        rowcnt = 0
+        try:
+            for params in seq_params:
+                self.execute(operation, params)
+                if self.with_rows and self._have_unread_result():
+                    self.fetchall()
+                rowcnt += self._rowcount
+        except (ValueError, TypeError) as err:
+            raise errors.InterfaceError(
+                "Failed executing the operation; {error}".format(error=err))
+        except:
+            # Raise whatever execute() raises
+            raise
+        self._rowcount = rowcnt
+
+    def fetchone(self):
+        """Returns next row of a query result set
+
+        Returns a tuple or None.
+        """
+        if self._cursor_exists:
+            self._connection.cmd_stmt_fetch(self._prepared['statement_id'])
+        return self._fetch_row() or None
+
+    def fetchmany(self, size=None):
+        res = []
+        cnt = (size or self.arraysize)
+        while cnt > 0 and self._have_unread_result():
+            cnt -= 1
+            row = self._fetch_row()
+            if row:
+                res.append(row)
+        return res
+
+    def fetchall(self):
+        if not self._have_unread_result():
+            raise errors.InterfaceError("No result set to fetch from.")
+        rows = []
+        if self._nextrow[0]:
+            rows.append(self._nextrow[0])
+        while self._have_unread_result():
+            if self._cursor_exists:
+                self._connection.cmd_stmt_fetch(
+                    self._prepared['statement_id'], MAX_RESULTS)
+            (tmp, eof) = self._connection.get_rows(
+                binary=self._binary, columns=self.description)
+            rows.extend(tmp)
+            self._handle_eof(eof)
+        self._rowcount = len(rows)
+        return rows
+
+
+class MySQLCursorDict(MySQLCursor):
+    """
+    Cursor fetching rows as dictionaries.
+
+    The fetch methods of this class will return dictionaries instead of tuples.
+    Each row is a dictionary that looks like:
+        row = {
+            "col1": value1,
+            "col2": value2
+        }
+    """
+    def _row_to_python(self, rowdata, desc=None):
+        """Convert a MySQL text result row to Python types
+
+        Returns a dictionary.
+        """
+        row = rowdata
+
+        if row:
+            return dict(zip(self.column_names, row))
+
+        return None
+
+    def fetchone(self):
+        """Returns next row of a query result set
+        """
+        row = self._fetch_row()
+        if row:
+            return self._row_to_python(row, self.description)
+        return None
+
+    def fetchall(self):
+        """Returns all rows of a query result set
+        """
+        if not self._have_unread_result():
+            raise errors.InterfaceError(ERR_NO_RESULT_TO_FETCH)
+        (rows, eof) = self._connection.get_rows()
+        if self._nextrow[0]:
+            rows.insert(0, self._nextrow[0])
+        res = []
+        for row in rows:
+            res.append(self._row_to_python(row, self.description))
+        self._handle_eof(eof)
+        rowcount = len(rows)
+        if rowcount >= 0 and self._rowcount == -1:
+            self._rowcount = 0
+        self._rowcount += rowcount
+        return res
+
+
+class MySQLCursorNamedTuple(MySQLCursor):
+    """
+    Cursor fetching rows as named tuple.
+
+    The fetch methods of this class will return namedtuples instead of tuples.
+    Each row is returned as a namedtuple and the values can be accessed as:
+    row.col1, row.col2
+    """
+    def _row_to_python(self, rowdata, desc=None):
+        """Convert a MySQL text result row to Python types
+
+        Returns a named tuple.
+        """
+        row = rowdata
+
+        if row:
+            # pylint: disable=W0201
+            columns = tuple(self.column_names)
+            try:
+                named_tuple = NAMED_TUPLE_CACHE[columns]
+            except KeyError:
+                named_tuple = namedtuple('Row', columns)
+                NAMED_TUPLE_CACHE[columns] = named_tuple
+            # pylint: enable=W0201
+            return named_tuple(*row)
+        return None
+
+    def fetchone(self):
+        """Returns next row of a query result set
+        """
+        row = self._fetch_row()
+        if row:
+            if hasattr(self._connection, 'converter'):
+                return self._row_to_python(row, self.description)
+            return row
+        return None
+
+    def fetchall(self):
+        """Returns all rows of a query result set
+        """
+        if not self._have_unread_result():
+            raise errors.InterfaceError(ERR_NO_RESULT_TO_FETCH)
+        (rows, eof) = self._connection.get_rows()
+        if self._nextrow[0]:
+            rows.insert(0, self._nextrow[0])
+        res = [self._row_to_python(row, self.description)
+               for row in rows]
+
+        self._handle_eof(eof)
+        rowcount = len(rows)
+        if rowcount >= 0 and self._rowcount == -1:
+            self._rowcount = 0
+        self._rowcount += rowcount
+        return res
+
+
+class MySQLCursorBufferedDict(MySQLCursorDict, MySQLCursorBuffered):
+    """
+    Buffered Cursor fetching rows as dictionaries.
+    """
+    def fetchone(self):
+        """Returns next row of a query result set
+        """
+        row = self._fetch_row()
+        if row:
+            return self._row_to_python(row, self.description)
+        return None
+
+    def fetchall(self):
+        """Returns all rows of a query result set
+        """
+        if self._rows is None:
+            raise errors.InterfaceError(ERR_NO_RESULT_TO_FETCH)
+        res = []
+        for row in self._rows[self._next_row:]:
+            res.append(self._row_to_python(
+                row, self.description))
+        self._next_row = len(self._rows)
+        return res
+
+
+class MySQLCursorBufferedNamedTuple(MySQLCursorNamedTuple, MySQLCursorBuffered):
+    """
+    Buffered Cursor fetching rows as named tuple.
+    """
+    def fetchone(self):
+        """Returns next row of a query result set
+        """
+        row = self._fetch_row()
+        if row:
+            return self._row_to_python(row, self.description)
+        return None
+
+    def fetchall(self):
+        """Returns all rows of a query result set
+        """
+        if self._rows is None:
+            raise errors.InterfaceError(ERR_NO_RESULT_TO_FETCH)
+        res = []
+        for row in self._rows[self._next_row:]:
+            res.append(self._row_to_python(
+                row, self.description))
+        self._next_row = len(self._rows)
+        return res
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/cursor_cext.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/cursor_cext.py
new file mode 100644
index 0000000..b3f629c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/cursor_cext.py
@@ -0,0 +1,1010 @@
+# Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Cursor classes using the C Extension
+"""
+
+from collections import namedtuple
+import re
+import weakref
+
+from _mysql_connector import MySQLInterfaceError  # pylint: disable=F0401,E0611
+
+from .abstracts import (MySQLConnectionAbstract, MySQLCursorAbstract,
+                        NAMED_TUPLE_CACHE)
+from .catch23 import PY2, isunicode
+from . import errors
+from .errorcode import CR_NO_RESULT_SET
+
+from .cursor import (
+    RE_PY_PARAM, RE_SQL_INSERT_STMT,
+    RE_SQL_ON_DUPLICATE, RE_SQL_COMMENT, RE_SQL_INSERT_VALUES,
+    RE_SQL_SPLIT_STMTS, RE_SQL_FIND_PARAM
+)
+
+
+class _ParamSubstitutor(object):
+
+    """
+    Substitutes parameters into SQL statement.
+    """
+
+    def __init__(self, params):
+        self.params = params
+        self.index = 0
+
+    def __call__(self, matchobj):
+        index = self.index
+        self.index += 1
+        try:
+            return self.params[index]
+        except IndexError:
+            raise errors.ProgrammingError(
+                "Not enough parameters for the SQL statement")
+
+    @property
+    def remaining(self):
+        """Returns number of parameters remaining to be substituted"""
+        return len(self.params) - self.index
+
+
+class CMySQLCursor(MySQLCursorAbstract):
+
+    """Default cursor for interacting with MySQL using C Extension"""
+
+    _raw = False
+    _buffered = False
+    _raw_as_string = False
+
+    def __init__(self, connection):
+        """Initialize"""
+        MySQLCursorAbstract.__init__(self)
+
+        self._insert_id = 0
+        self._warning_count = 0
+        self._warnings = None
+        self._affected_rows = -1
+        self._rowcount = -1
+        self._nextrow = (None, None)
+        self._executed = None
+        self._executed_list = []
+        self._stored_results = []
+
+        if not isinstance(connection, MySQLConnectionAbstract):
+            raise errors.InterfaceError(errno=2048)
+        self._cnx = weakref.proxy(connection)
+
+    def reset(self, free=True):
+        """Reset the cursor
+
+        When free is True (default) the result will be freed.
+        """
+        self._rowcount = -1
+        self._nextrow = None
+        self._affected_rows = -1
+        self._insert_id = 0
+        self._warning_count = 0
+        self._warnings = None
+        self._warnings = None
+        self._warning_count = 0
+        self._description = None
+        self._executed = None
+        self._executed_list = []
+        if free and self._cnx:
+            self._cnx.free_result()
+        super(CMySQLCursor, self).reset()
+
+    def _fetch_warnings(self):
+        """Fetch warnings
+
+        Fetch warnings doing a SHOW WARNINGS. Can be called after getting
+        the result.
+
+        Returns a result set or None when there were no warnings.
+
+        Raises errors.Error (or subclass) on errors.
+
+        Returns list of tuples or None.
+        """
+        warnings = []
+        try:
+            # force freeing result
+            self._cnx.consume_results()
+            _ = self._cnx.cmd_query("SHOW WARNINGS")
+            warnings = self._cnx.get_rows()[0]
+            self._cnx.consume_results()
+        except MySQLInterfaceError as exc:
+            raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                             sqlstate=exc.sqlstate)
+        except Exception as err:
+            raise errors.InterfaceError(
+                "Failed getting warnings; {0}".format(str(err)))
+
+        if warnings:
+            return warnings
+
+        return None
+
+    def _handle_warnings(self):
+        """Handle possible warnings after all results are consumed"""
+        if self._cnx.get_warnings is True and self._warning_count:
+            self._warnings = self._fetch_warnings()
+
+    def _handle_result(self, result):
+        """Handles the result after statement execution"""
+        if 'columns' in result:
+            self._description = result['columns']
+            self._rowcount = 0
+            self._handle_resultset()
+        else:
+            self._insert_id = result['insert_id']
+            self._warning_count = result['warning_count']
+            self._affected_rows = result['affected_rows']
+            self._rowcount = -1
+            self._handle_warnings()
+            if self._cnx.raise_on_warnings is True and self._warnings:
+                raise errors.get_mysql_exception(*self._warnings[0][1:3])
+
+    def _handle_resultset(self):
+        """Handle a result set"""
+        pass
+
+    def _handle_eof(self):
+        """Handle end of reading the result
+
+        Raises an errors.Error on errors.
+        """
+        self._warning_count = self._cnx.warning_count
+        self._handle_warnings()
+        if self._cnx.raise_on_warnings is True and self._warnings:
+            raise errors.get_mysql_exception(*self._warnings[0][1:3])
+
+        if not self._cnx.more_results:
+            self._cnx.free_result()
+
+    def _execute_iter(self):
+        """Generator returns MySQLCursor objects for multiple statements
+
+        Deprecated: use nextset() method directly.
+
+        This method is only used when multiple statements are executed
+        by the execute() method. It uses zip() to make an iterator from the
+        given query_iter (result of MySQLConnection.cmd_query_iter()) and
+        the list of statements that were executed.
+        """
+        executed_list = RE_SQL_SPLIT_STMTS.split(self._executed)
+        i = 0
+        self._executed = executed_list[i]
+        yield self
+
+        while True:
+            try:
+                if not self.nextset():
+                    raise StopIteration
+            except errors.InterfaceError as exc:
+                # Result without result set
+                if exc.errno != CR_NO_RESULT_SET:
+                    raise
+            except StopIteration:
+                return
+            i += 1
+            try:
+                self._executed = executed_list[i].strip()
+            except IndexError:
+                self._executed = executed_list[0]
+            yield self
+        return
+
+    def execute(self, operation, params=(), multi=False):
+        """Execute given statement using given parameters
+
+        Deprecated: The multi argument is not needed and nextset() should
+        be used to handle multiple result sets.
+        """
+        if not operation:
+            return None
+
+        if not self._cnx:
+            raise errors.ProgrammingError("Cursor is not connected")
+        self._cnx.handle_unread_result()
+
+        stmt = ''
+        self.reset()
+
+        try:
+            if isunicode(operation):
+                stmt = operation.encode(self._cnx.python_charset)
+            else:
+                stmt = operation
+        except (UnicodeDecodeError, UnicodeEncodeError) as err:
+            raise errors.ProgrammingError(str(err))
+
+        if params:
+            prepared = self._cnx.prepare_for_mysql(params)
+            if isinstance(prepared, dict):
+                for key, value in prepared.items():
+                    if PY2:
+                        stmt = stmt.replace("%({0})s".format(key), value)
+                    else:
+                        stmt = stmt.replace("%({0})s".format(key).encode(),
+                                            value)
+            elif isinstance(prepared, (list, tuple)):
+                psub = _ParamSubstitutor(prepared)
+                stmt = RE_PY_PARAM.sub(psub, stmt)
+                if psub.remaining != 0:
+                    raise errors.ProgrammingError(
+                        "Not all parameters were used in the SQL statement")
+
+        try:
+            result = self._cnx.cmd_query(stmt, raw=self._raw,
+                                         buffered=self._buffered,
+                                         raw_as_string=self._raw_as_string)
+        except MySQLInterfaceError as exc:
+            raise errors.get_mysql_exception(msg=exc.msg, errno=exc.errno,
+                                             sqlstate=exc.sqlstate)
+
+        self._executed = stmt
+        self._handle_result(result)
+
+        if multi:
+            return self._execute_iter()
+
+        return None
+
+    def _batch_insert(self, operation, seq_params):
+        """Implements multi row insert"""
+        def remove_comments(match):
+            """Remove comments from INSERT statements.
+
+            This function is used while removing comments from INSERT
+            statements. If the matched string is a comment not enclosed
+            by quotes, it returns an empty string, else the string itself.
+            """
+            if match.group(1):
+                return ""
+            return match.group(2)
+
+        tmp = re.sub(RE_SQL_ON_DUPLICATE, '',
+                     re.sub(RE_SQL_COMMENT, remove_comments, operation))
+
+        matches = re.search(RE_SQL_INSERT_VALUES, tmp)
+        if not matches:
+            raise errors.InterfaceError(
+                "Failed rewriting statement for multi-row INSERT. "
+                "Check SQL syntax."
+            )
+        fmt = matches.group(1).encode(self._cnx.python_charset)
+        values = []
+
+        try:
+            stmt = operation.encode(self._cnx.python_charset)
+            for params in seq_params:
+                tmp = fmt
+                prepared = self._cnx.prepare_for_mysql(params)
+                if isinstance(prepared, dict):
+                    for key, value in prepared.items():
+                        tmp = tmp.replace("%({0})s".format(key).encode(), value)
+                elif isinstance(prepared, (list, tuple)):
+                    psub = _ParamSubstitutor(prepared)
+                    tmp = RE_PY_PARAM.sub(psub, tmp)
+                    if psub.remaining != 0:
+                        raise errors.ProgrammingError(
+                            "Not all parameters were used in the SQL statement")
+                values.append(tmp)
+
+            if fmt in stmt:
+                stmt = stmt.replace(fmt, b','.join(values), 1)
+                self._executed = stmt
+                return stmt
+            return None
+        except (UnicodeDecodeError, UnicodeEncodeError) as err:
+            raise errors.ProgrammingError(str(err))
+        except Exception as err:
+            raise errors.InterfaceError(
+                "Failed executing the operation; %s" % err)
+
+
+    def executemany(self, operation, seq_params):
+        """Execute the given operation multiple times"""
+        if not operation or not seq_params:
+            return None
+
+        if not self._cnx:
+            raise errors.ProgrammingError("Cursor is not connected")
+        self._cnx.handle_unread_result()
+
+        if not isinstance(seq_params, (list, tuple)):
+            raise errors.ProgrammingError(
+                "Parameters for query must be list or tuple.")
+
+        # Optimize INSERTs by batching them
+        if re.match(RE_SQL_INSERT_STMT, operation):
+            if not seq_params:
+                self._rowcount = 0
+                return None
+            stmt = self._batch_insert(operation, seq_params)
+            if stmt is not None:
+                return self.execute(stmt)
+
+        rowcnt = 0
+        try:
+            for params in seq_params:
+                self.execute(operation, params)
+                try:
+                    while True:
+                        if self._description:
+                            rowcnt += len(self._cnx.get_rows()[0])
+                        else:
+                            rowcnt += self._affected_rows
+                        if not self.nextset():
+                            break
+                except StopIteration:
+                    # No more results
+                    pass
+
+        except (ValueError, TypeError) as err:
+            raise errors.ProgrammingError(
+                "Failed executing the operation; {0}".format(err))
+
+        self._rowcount = rowcnt
+        return None
+
+    @property
+    def description(self):
+        """Returns description of columns in a result"""
+        return self._description
+
+    @property
+    def rowcount(self):
+        """Returns the number of rows produced or affected"""
+        if self._rowcount == -1:
+            return self._affected_rows
+        return self._rowcount
+
+    @property
+    def lastrowid(self):
+        """Returns the value generated for an AUTO_INCREMENT column"""
+        return self._insert_id
+
+    def close(self):
+        """Close the cursor
+
+        The result will be freed.
+        """
+        if not self._cnx:
+            return False
+
+        self._cnx.handle_unread_result()
+        self._warnings = None
+        self._cnx = None
+        return True
+
+    def callproc(self, procname, args=()):
+        """Calls a stored procedure with the given arguments"""
+        if not procname or not isinstance(procname, str):
+            raise ValueError("procname must be a string")
+
+        if not isinstance(args, (tuple, list)):
+            raise ValueError("args must be a sequence")
+
+        argfmt = "@_{name}_arg{index}"
+        self._stored_results = []
+
+        try:
+            argnames = []
+            argtypes = []
+            if args:
+                for idx, arg in enumerate(args):
+                    argname = argfmt.format(name=procname, index=idx + 1)
+                    argnames.append(argname)
+                    if isinstance(arg, tuple):
+                        argtypes.append(" CAST({0} AS {1})".format(argname,
+                                                                   arg[1]))
+                        self.execute("SET {0}=%s".format(argname), (arg[0],))
+                    else:
+                        argtypes.append(argname)
+                        self.execute("SET {0}=%s".format(argname), (arg,))
+
+            call = "CALL {0}({1})".format(procname, ','.join(argnames))
+
+            result = self._cnx.cmd_query(call, raw=self._raw,
+                                         raw_as_string=self._raw_as_string)
+
+            results = []
+            while self._cnx.result_set_available:
+                result = self._cnx.fetch_eof_columns()
+                # pylint: disable=W0212
+                if self._raw:
+                    cur = CMySQLCursorBufferedRaw(self._cnx._get_self())
+                else:
+                    cur = CMySQLCursorBuffered(self._cnx._get_self())
+                cur._executed = "(a result of {0})".format(call)
+                cur._handle_result(result)
+                # pylint: enable=W0212
+                results.append(cur)
+                self._cnx.next_result()
+            self._stored_results = results
+            self._handle_eof()
+
+            if argnames:
+                self.reset()
+                select = "SELECT {0}".format(','.join(argtypes))
+                self.execute(select)
+
+                return self.fetchone()
+            return tuple()
+
+        except errors.Error:
+            raise
+        except Exception as err:
+            raise errors.InterfaceError(
+                "Failed calling stored routine; {0}".format(err))
+
+    def nextset(self):
+        """Skip to the next available result set"""
+        if not self._cnx.next_result():
+            self.reset(free=True)
+            return None
+        self.reset(free=False)
+
+        if not self._cnx.result_set_available:
+            eof = self._cnx.fetch_eof_status()
+            self._handle_result(eof)
+            raise errors.InterfaceError(errno=CR_NO_RESULT_SET)
+
+        self._handle_result(self._cnx.fetch_eof_columns())
+        return True
+
+    def fetchall(self):
+        """Returns all rows of a query result set
+
+        Returns a list of tuples.
+        """
+        if not self._cnx.unread_result:
+            raise errors.InterfaceError("No result set to fetch from.")
+        rows = self._cnx.get_rows()
+        if self._nextrow and self._nextrow[0]:
+            rows[0].insert(0, self._nextrow[0])
+
+        if not rows[0]:
+            self._handle_eof()
+            return []
+
+        self._rowcount += len(rows[0])
+        self._handle_eof()
+        #self._cnx.handle_unread_result()
+        return rows[0]
+
+    def fetchmany(self, size=1):
+        """Returns the next set of rows of a result set"""
+        if self._nextrow and self._nextrow[0]:
+            rows = [self._nextrow[0]]
+            size -= 1
+        else:
+            rows = []
+
+        if size and self._cnx.unread_result:
+            rows.extend(self._cnx.get_rows(size)[0])
+
+        if size:
+            if self._cnx.unread_result:
+                self._nextrow = self._cnx.get_row()
+                if self._nextrow and not self._nextrow[0] and \
+                    not self._cnx.more_results:
+                    self._cnx.free_result()
+            else:
+                self._nextrow = (None, None)
+
+        if not rows:
+            self._handle_eof()
+            return []
+
+        self._rowcount += len(rows)
+        return rows
+
+    def fetchone(self):
+        """Returns next row of a query result set"""
+        row = self._nextrow
+        if not row and self._cnx.unread_result:
+            row = self._cnx.get_row()
+
+        if row and row[0]:
+            self._nextrow = self._cnx.get_row()
+            if not self._nextrow[0] and not self._cnx.more_results:
+                self._cnx.free_result()
+        else:
+            self._handle_eof()
+            return None
+        self._rowcount += 1
+        return row[0]
+
+    def __iter__(self):
+        """Iteration over the result set
+
+        Iteration over the result set which calls self.fetchone()
+        and returns the next row.
+        """
+        return iter(self.fetchone, None)
+
+    def stored_results(self):
+        """Returns an iterator for stored results
+
+        This method returns an iterator over results which are stored when
+        callproc() is called. The iterator will provide MySQLCursorBuffered
+        instances.
+
+        Returns a iterator.
+        """
+        for i in range(len(self._stored_results)):
+            yield self._stored_results[i]
+
+        self._stored_results = []
+
+    if PY2:
+        def next(self):
+            """Used for iterating over the result set."""
+            return self.__next__()
+
+    def __next__(self):
+        """Iteration over the result set
+        Used for iterating over the result set. Calls self.fetchone()
+        to get the next row.
+
+        Raises StopIteration when no more rows are available.
+        """
+        try:
+            row = self.fetchone()
+        except errors.InterfaceError:
+            raise StopIteration
+        if not row:
+            raise StopIteration
+        return row
+
+    @property
+    def column_names(self):
+        """Returns column names
+
+        This property returns the columns names as a tuple.
+
+        Returns a tuple.
+        """
+        if not self.description:
+            return ()
+        return tuple([d[0] for d in self.description])
+
+    @property
+    def statement(self):
+        """Returns the executed statement
+
+        This property returns the executed statement. When multiple
+        statements were executed, the current statement in the iterator
+        will be returned.
+        """
+        try:
+            return self._executed.strip().decode('utf8')
+        except AttributeError:
+            return self._executed.strip()
+
+    @property
+    def with_rows(self):
+        """Returns whether the cursor could have rows returned
+
+        This property returns True when column descriptions are available
+        and possibly also rows, which will need to be fetched.
+
+        Returns True or False.
+        """
+        if self.description:
+            return True
+        return False
+
+    def __str__(self):
+        fmt = "{class_name}: {stmt}"
+        if self._executed:
+            try:
+                executed = self._executed.decode('utf-8')
+            except AttributeError:
+                executed = self._executed
+            if len(executed) > 40:
+                executed = executed[:40] + '..'
+        else:
+            executed = '(Nothing executed yet)'
+
+        return fmt.format(class_name=self.__class__.__name__, stmt=executed)
+
+
+class CMySQLCursorBuffered(CMySQLCursor):
+
+    """Cursor using C Extension buffering results"""
+
+    def __init__(self, connection):
+        """Initialize"""
+        super(CMySQLCursorBuffered, self).__init__(connection)
+
+        self._rows = None
+        self._next_row = 0
+
+    def _handle_resultset(self):
+        """Handle a result set"""
+        self._rows = self._cnx.get_rows()[0]
+        self._next_row = 0
+        self._rowcount = len(self._rows)
+        self._handle_eof()
+
+    def reset(self, free=True):
+        """Reset the cursor to default"""
+        self._rows = None
+        self._next_row = 0
+        super(CMySQLCursorBuffered, self).reset(free=free)
+
+    def _fetch_row(self):
+        """Returns the next row in the result set
+
+        Returns a tuple or None.
+        """
+        row = None
+        try:
+            row = self._rows[self._next_row]
+        except IndexError:
+            return None
+        else:
+            self._next_row += 1
+
+        return row
+
+    def fetchall(self):
+        if self._rows is None:
+            raise errors.InterfaceError("No result set to fetch from.")
+        res = self._rows[self._next_row:]
+        self._next_row = len(self._rows)
+        return res
+
+    def fetchmany(self, size=1):
+        res = []
+        cnt = size or self.arraysize
+        while cnt > 0:
+            cnt -= 1
+            row = self._fetch_row()
+            if row:
+                res.append(row)
+            else:
+                break
+        return res
+
+    def fetchone(self):
+        return self._fetch_row()
+
+
+class CMySQLCursorRaw(CMySQLCursor):
+
+    """Cursor using C Extension return raw results"""
+
+    _raw = True
+
+
+class CMySQLCursorBufferedRaw(CMySQLCursorBuffered):
+
+    """Cursor using C Extension buffering raw results"""
+
+    _raw = True
+
+
+class CMySQLCursorDict(CMySQLCursor):
+
+    """Cursor using C Extension returning rows as dictionaries"""
+
+    _raw = False
+
+    def fetchone(self):
+        """Returns all rows of a query result set
+        """
+        row = super(CMySQLCursorDict, self).fetchone()
+        if row:
+            return dict(zip(self.column_names, row))
+        return None
+
+    def fetchmany(self, size=1):
+        """Returns next set of rows as list of dictionaries"""
+        res = super(CMySQLCursorDict, self).fetchmany(size=size)
+        return [dict(zip(self.column_names, row)) for row in res]
+
+    def fetchall(self):
+        """Returns all rows of a query result set as list of dictionaries"""
+        res = super(CMySQLCursorDict, self).fetchall()
+        return [dict(zip(self.column_names, row)) for row in res]
+
+
+class CMySQLCursorBufferedDict(CMySQLCursorBuffered):
+
+    """Cursor using C Extension buffering and returning rows as dictionaries"""
+
+    _raw = False
+
+    def _fetch_row(self):
+        row = super(CMySQLCursorBufferedDict, self)._fetch_row()
+        if row:
+            return dict(zip(self.column_names, row))
+        return None
+
+    def fetchall(self):
+        res = super(CMySQLCursorBufferedDict, self).fetchall()
+        return [dict(zip(self.column_names, row)) for row in res]
+
+
+class CMySQLCursorNamedTuple(CMySQLCursor):
+
+    """Cursor using C Extension returning rows as named tuples"""
+
+    def _handle_resultset(self):
+        """Handle a result set"""
+        super(CMySQLCursorNamedTuple, self)._handle_resultset()
+        # pylint: disable=W0201
+        columns = tuple(self.column_names)
+        try:
+            self.named_tuple = NAMED_TUPLE_CACHE[columns]
+        except KeyError:
+            self.named_tuple = namedtuple('Row', columns)
+            NAMED_TUPLE_CACHE[columns] = self.named_tuple
+        # pylint: enable=W0201
+
+    def fetchone(self):
+        """Returns all rows of a query result set
+        """
+        row = super(CMySQLCursorNamedTuple, self).fetchone()
+        if row:
+            return self.named_tuple(*row)
+        return None
+
+    def fetchmany(self, size=1):
+        """Returns next set of rows as list of named tuples"""
+        res = super(CMySQLCursorNamedTuple, self).fetchmany(size=size)
+        return [self.named_tuple(*res[0])]
+
+    def fetchall(self):
+        """Returns all rows of a query result set as list of named tuples"""
+        res = super(CMySQLCursorNamedTuple, self).fetchall()
+        return [self.named_tuple(*row) for row in res]
+
+
+class CMySQLCursorBufferedNamedTuple(CMySQLCursorBuffered):
+
+    """Cursor using C Extension buffering and returning rows as named tuples"""
+
+    def _handle_resultset(self):
+        super(CMySQLCursorBufferedNamedTuple, self)._handle_resultset()
+        # pylint: disable=W0201
+        self.named_tuple = namedtuple('Row', self.column_names)
+        # pylint: enable=W0201
+
+    def _fetch_row(self):
+        row = super(CMySQLCursorBufferedNamedTuple, self)._fetch_row()
+        if row:
+            return self.named_tuple(*row)
+        return None
+
+    def fetchall(self):
+        res = super(CMySQLCursorBufferedNamedTuple, self).fetchall()
+        return [self.named_tuple(*row) for row in res]
+
+
+class CMySQLCursorPrepared(CMySQLCursor):
+
+    """Cursor using MySQL Prepared Statements"""
+
+    def __init__(self, connection):
+        super(CMySQLCursorPrepared, self).__init__(connection)
+        self._rows = None
+        self._rowcount = 0
+        self._next_row = 0
+        self._binary = True
+        self._stmt = None
+
+    def _handle_eof(self):
+        """Handle EOF packet"""
+        self._nextrow = (None, None)
+        self._handle_warnings()
+        if self._cnx.raise_on_warnings is True and self._warnings:
+            raise errors.get_mysql_exception(
+                self._warnings[0][1], self._warnings[0][2])
+
+    def _fetch_row(self, raw=False):
+        """Returns the next row in the result set
+
+        Returns a tuple or None.
+        """
+        if not self._stmt or not self._stmt.have_result_set:
+            return None
+        row = None
+
+        if self._nextrow == (None, None):
+            (row, eof) = self._cnx.get_row(
+                binary=self._binary, columns=self.description, raw=raw,
+                prep_stmt=self._stmt)
+        else:
+            (row, eof) = self._nextrow
+
+        if row:
+            self._nextrow = self._cnx.get_row(
+                binary=self._binary, columns=self.description, raw=raw,
+                prep_stmt=self._stmt)
+            eof = self._nextrow[1]
+            if eof is not None:
+                self._warning_count = eof["warning_count"]
+                self._handle_eof()
+            if self._rowcount == -1:
+                self._rowcount = 1
+            else:
+                self._rowcount += 1
+        if eof:
+            self._warning_count = eof["warning_count"]
+            self._handle_eof()
+
+        return row
+
+    def callproc(self, procname, args=None):
+        """Calls a stored procedue
+
+        Not supported with CMySQLCursorPrepared.
+        """
+        raise errors.NotSupportedError()
+
+    def close(self):
+        """Close the cursor
+
+        This method will try to deallocate the prepared statement and close
+        the cursor.
+        """
+        if self._stmt:
+            self.reset()
+            self._cnx.cmd_stmt_close(self._stmt)
+            self._stmt = None
+        super(CMySQLCursorPrepared, self).close()
+
+    def reset(self, free=True):
+        """Resets the prepared statement."""
+        if self._stmt:
+            self._cnx.cmd_stmt_reset(self._stmt)
+        super(CMySQLCursorPrepared, self).reset(free=free)
+
+    def execute(self, operation, params=(), multi=False):  # multi is unused
+        """Prepare and execute a MySQL Prepared Statement
+
+        This method will preare the given operation and execute it using
+        the given parameters.
+
+        If the cursor instance already had a prepared statement, it is
+        first closed.
+        """
+        if not operation:
+            return
+
+        if not self._cnx:
+            raise errors.ProgrammingError("Cursor is not connected")
+
+        self._cnx.handle_unread_result(prepared=True)
+
+        if operation is not self._executed:
+            if self._stmt:
+                self._cnx.cmd_stmt_close(self._stmt)
+
+            self._executed = operation
+
+            try:
+                if not isinstance(operation, bytes):
+                    charset = self._cnx.charset
+                    if charset == "utf8mb4":
+                        charset = "utf8"
+                    operation = operation.encode(charset)
+            except (UnicodeDecodeError, UnicodeEncodeError) as err:
+                raise errors.ProgrammingError(str(err))
+
+            # need to convert %s to ? before sending it to MySQL
+            if b"%s" in operation:
+                operation = re.sub(RE_SQL_FIND_PARAM, b"?", operation)
+
+            try:
+                self._stmt = self._cnx.cmd_stmt_prepare(operation)
+            except (errors.Error, errors.ProgrammingError):
+                self._stmt = None
+                raise
+
+        self._cnx.cmd_stmt_reset(self._stmt)
+
+        if params and self._stmt.param_count != len(params):
+            raise errors.ProgrammingError(
+                errno=1210,
+                msg="Incorrect number of arguments executing prepared "
+                    "statement")
+
+        res = self._cnx.cmd_stmt_execute(self._stmt, *params)
+        if res:
+            self._handle_result(res)
+
+    def executemany(self, operation, seq_params):
+        """Prepare and execute a MySQL Prepared Statement many times
+
+        This method will prepare the given operation and execute with each
+        tuple found the list seq_params.
+
+        If the cursor instance already had a prepared statement, it is
+        first closed.
+        """
+        rowcnt = 0
+        try:
+            for params in seq_params:
+                self.execute(operation, params)
+                if self.with_rows:
+                    self.fetchall()
+                rowcnt += self._rowcount
+        except (ValueError, TypeError) as err:
+            raise errors.InterfaceError(
+                "Failed executing the operation; {error}".format(error=err))
+        except:
+            # Raise whatever execute() raises
+            raise
+        self._rowcount = rowcnt
+
+    def fetchone(self):
+        """Returns next row of a query result set
+
+        Returns a tuple or None.
+        """
+        return self._fetch_row() or None
+
+    def fetchmany(self, size=None):
+        """Returns the next set of rows of a result set
+
+        Returns a list of tuples.
+        """
+        res = []
+        cnt = size or self.arraysize
+        while cnt > 0 and self._stmt.have_result_set:
+            cnt -= 1
+            row = self._fetch_row()
+            if row:
+                res.append(row)
+        return res
+
+    def fetchall(self):
+        """Returns all rows of a query result set
+
+        Returns a list of tuples.
+        """
+        if not self._stmt.have_result_set:
+            raise errors.InterfaceError("No result set to fetch from.")
+        rows = self._cnx.get_rows(prep_stmt=self._stmt)
+        if self._nextrow and self._nextrow[0]:
+            rows[0].insert(0, self._nextrow[0])
+
+        if not rows[0]:
+            self._handle_eof()
+            return []
+
+        self._rowcount += len(rows[0])
+        self._handle_eof()
+        return rows[0]
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/custom_types.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/custom_types.py
new file mode 100644
index 0000000..3613af6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/custom_types.py
@@ -0,0 +1,50 @@
+# Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Custom Python types used by MySQL Connector/Python"""
+
+
+import sys
+
+
+class HexLiteral(str):
+
+    """Class holding MySQL hex literals"""
+
+    def __new__(cls, str_, charset='utf8'):
+        if sys.version_info[0] == 2:
+            hexed = ["%02x" % ord(i) for i in str_.encode(charset)]
+        else:
+            hexed = ["%02x" % i for i in str_.encode(charset)]
+        obj = str.__new__(cls, ''.join(hexed))
+        obj.charset = charset
+        obj.original = str_
+        return obj
+
+    def __str__(self):
+        return '0x' + self
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/dbapi.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/dbapi.py
new file mode 100644
index 0000000..873cfbb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/dbapi.py
@@ -0,0 +1,80 @@
+# Copyright (c) 2009, 2017, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""
+This module implements some constructors and singletons as required by the
+DB API v2.0 (PEP-249).
+"""
+
+# Python Db API v2
+apilevel = '2.0'
+threadsafety = 1
+paramstyle = 'pyformat'
+
+import time
+import datetime
+
+from . import constants
+
+class _DBAPITypeObject(object):
+
+    def __init__(self, *values):
+        self.values = values
+
+    def __eq__(self, other):
+        if other in self.values:
+            return True
+        else:
+            return False
+
+    def __ne__(self, other):
+        if other in self.values:
+            return False
+        else:
+            return True
+
+Date = datetime.date
+Time = datetime.time
+Timestamp = datetime.datetime
+
+def DateFromTicks(ticks):
+    return Date(*time.localtime(ticks)[:3])
+
+def TimeFromTicks(ticks):
+    return Time(*time.localtime(ticks)[3:6])
+
+def TimestampFromTicks(ticks):
+    return Timestamp(*time.localtime(ticks)[:6])
+
+Binary = bytes
+
+STRING = _DBAPITypeObject(*constants.FieldType.get_string_types())
+BINARY = _DBAPITypeObject(*constants.FieldType.get_binary_types())
+NUMBER = _DBAPITypeObject(*constants.FieldType.get_number_types())
+DATETIME = _DBAPITypeObject(*constants.FieldType.get_timestamp_types())
+ROWID = _DBAPITypeObject()
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new file mode 100644
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--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/base.py
@@ -0,0 +1,543 @@
+# Copyright (c) 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Django database Backend using MySQL Connector/Python.
+
+This Django database backend is heavily based on the MySQL backend from Django.
+
+Changes include:
+* Support for microseconds (MySQL 5.6.3 and later)
+* Using INFORMATION_SCHEMA where possible
+* Using new defaults for, for example SQL_AUTO_IS_NULL
+
+Requires and comes with MySQL Connector/Python v8.0.22 and later:
+    http://dev.mysql.com/downloads/connector/python/
+"""
+
+import warnings
+import sys
+
+from datetime import datetime
+
+from django.conf import settings
+from django.core.exceptions import ImproperlyConfigured
+from django.db import IntegrityError
+from django.db.backends.base.base import BaseDatabaseWrapper
+from django.db import utils
+from django.utils.functional import cached_property
+from django.utils import dateparse, timezone
+
+try:
+    import mysql.connector
+    from mysql.connector.conversion import MySQLConverter, MySQLConverterBase
+except ImportError as err:
+    raise ImproperlyConfigured(
+        "Error loading mysql.connector module: {0}".format(err))
+
+try:
+    from _mysql_connector import datetime_to_mysql, time_to_mysql
+except ImportError:
+    HAVE_CEXT = False
+else:
+    HAVE_CEXT = True
+
+from .client import DatabaseClient
+from .creation import DatabaseCreation
+from .introspection import DatabaseIntrospection
+from .validation import DatabaseValidation
+from .features import DatabaseFeatures
+from .operations import DatabaseOperations
+from .schema import DatabaseSchemaEditor
+
+
+Error = mysql.connector.Error
+DatabaseError = mysql.connector.DatabaseError
+NotSupportedError = mysql.connector.NotSupportedError
+OperationalError = mysql.connector.OperationalError
+ProgrammingError = mysql.connector.ProgrammingError
+
+
+def adapt_datetime_with_timezone_support(value):
+    # Equivalent to DateTimeField.get_db_prep_value. Used only by raw SQL.
+    if settings.USE_TZ:
+        if timezone.is_naive(value):
+            warnings.warn("MySQL received a naive datetime (%s)"
+                          " while time zone support is active." % value,
+                          RuntimeWarning)
+            default_timezone = timezone.get_default_timezone()
+            value = timezone.make_aware(value, default_timezone)
+        value = value.astimezone(timezone.utc).replace(tzinfo=None)
+    if HAVE_CEXT:
+        return datetime_to_mysql(value)
+    else:
+        return value.strftime("%Y-%m-%d %H:%M:%S.%f")
+
+
+class CursorWrapper:
+    """Wrapper around MySQL Connector/Python's cursor class.
+
+    The cursor class is defined by the options passed to MySQL
+    Connector/Python. If buffered option is True in those options,
+    MySQLCursorBuffered will be used.
+    """
+    codes_for_integrityerror = (
+        1048,  # Column cannot be null
+        1690,  # BIGINT UNSIGNED value is out of range
+        3819,  # CHECK constraint is violated
+        4025,  # CHECK constraint failed
+    )
+
+    def __init__(self, cursor):
+        self.cursor = cursor
+
+    def _adapt_execute_args_dict(self, args):
+        if not args:
+            return args
+        new_args = dict(args)
+        for key, value in args.items():
+            if isinstance(value, datetime):
+                new_args[key] = adapt_datetime_with_timezone_support(value)
+
+        return new_args
+
+    def _adapt_execute_args(self, args):
+        if not args:
+            return args
+        new_args = list(args)
+        for i, arg in enumerate(args):
+            if isinstance(arg, datetime):
+                new_args[i] = adapt_datetime_with_timezone_support(arg)
+
+        return tuple(new_args)
+
+    def execute(self, query, args=None):
+        """Executes the given operation
+
+        This wrapper method around the execute()-method of the cursor is
+        mainly needed to re-raise using different exceptions.
+        """
+        if isinstance(args, dict):
+            new_args = self._adapt_execute_args_dict(args)
+        else:
+            new_args = self._adapt_execute_args(args)
+        try:
+            return self.cursor.execute(query, new_args)
+        except mysql.connector.OperationalError as e:
+            if e.args[0] in self.codes_for_integrityerror:
+                raise IntegrityError(*tuple(e.args))
+            raise
+
+    def executemany(self, query, args):
+        """Executes the given operation
+
+        This wrapper method around the executemany()-method of the cursor is
+        mainly needed to re-raise using different exceptions.
+        """
+        try:
+            return self.cursor.executemany(query, args)
+        except mysql.connector.OperationalError as e:
+            if e.args[0] in self.codes_for_integrityerror:
+                raise IntegrityError(*tuple(e.args))
+            raise
+
+    def __getattr__(self, attr):
+        """Return attribute of wrapped cursor"""
+        return getattr(self.cursor, attr)
+
+    def __iter__(self):
+        """Returns iterator over wrapped cursor"""
+        return iter(self.cursor)
+
+
+class DatabaseWrapper(BaseDatabaseWrapper):
+    vendor = 'mysql'
+    # This dictionary maps Field objects to their associated MySQL column
+    # types, as strings. Column-type strings can contain format strings; they'll
+    # be interpolated against the values of Field.__dict__ before being output.
+    # If a column type is set to None, it won't be included in the output.
+    data_types = {
+        'AutoField': 'integer AUTO_INCREMENT',
+        'BigAutoField': 'bigint AUTO_INCREMENT',
+        'BinaryField': 'longblob',
+        'BooleanField': 'bool',
+        'CharField': 'varchar(%(max_length)s)',
+        'DateField': 'date',
+        'DateTimeField': 'datetime(6)',
+        'DecimalField': 'numeric(%(max_digits)s, %(decimal_places)s)',
+        'DurationField': 'bigint',
+        'FileField': 'varchar(%(max_length)s)',
+        'FilePathField': 'varchar(%(max_length)s)',
+        'FloatField': 'double precision',
+        'IntegerField': 'integer',
+        'BigIntegerField': 'bigint',
+        'IPAddressField': 'char(15)',
+        'GenericIPAddressField': 'char(39)',
+        'JSONField': 'json',
+        'NullBooleanField': 'bool',
+        'OneToOneField': 'integer',
+        'PositiveBigIntegerField': 'bigint UNSIGNED',
+        'PositiveIntegerField': 'integer UNSIGNED',
+        'PositiveSmallIntegerField': 'smallint UNSIGNED',
+        'SlugField': 'varchar(%(max_length)s)',
+        'SmallAutoField': 'smallint AUTO_INCREMENT',
+        'SmallIntegerField': 'smallint',
+        'TextField': 'longtext',
+        'TimeField': 'time(6)',
+        'UUIDField': 'char(32)',
+    }
+
+    # For these data types:
+    # - MySQL < 8.0.13 doesn't accept default values and
+    #   implicitly treat them as nullable
+    # - all versions of MySQL doesn't support full width database
+    #   indexes
+    _limited_data_types = (
+        'tinyblob', 'blob', 'mediumblob', 'longblob', 'tinytext', 'text',
+        'mediumtext', 'longtext', 'json',
+    )
+
+    operators = {
+        'exact': '= %s',
+        'iexact': 'LIKE %s',
+        'contains': 'LIKE BINARY %s',
+        'icontains': 'LIKE %s',
+        'regex': 'REGEXP BINARY %s',
+        'iregex': 'REGEXP %s',
+        'gt': '> %s',
+        'gte': '>= %s',
+        'lt': '< %s',
+        'lte': '<= %s',
+        'startswith': 'LIKE BINARY %s',
+        'endswith': 'LIKE BINARY %s',
+        'istartswith': 'LIKE %s',
+        'iendswith': 'LIKE %s',
+    }
+
+    # The patterns below are used to generate SQL pattern lookup clauses when
+    # the right-hand side of the lookup isn't a raw string (it might be an expression
+    # or the result of a bilateral transformation).
+    # In those cases, special characters for LIKE operators (e.g. \, *, _) should be
+    # escaped on database side.
+    #
+    # Note: we use str.format() here for readability as '%' is used as a wildcard for
+    # the LIKE operator.
+    pattern_esc = r"REPLACE(REPLACE(REPLACE({}, '\\', '\\\\'), '%%', '\%%'), '_', '\_')"
+    pattern_ops = {
+        'contains': "LIKE BINARY CONCAT('%%', {}, '%%')",
+        'icontains': "LIKE CONCAT('%%', {}, '%%')",
+        'startswith': "LIKE BINARY CONCAT({}, '%%')",
+        'istartswith': "LIKE CONCAT({}, '%%')",
+        'endswith': "LIKE BINARY CONCAT('%%', {})",
+        'iendswith': "LIKE CONCAT('%%', {})",
+    }
+
+    isolation_levels = {
+        'read uncommitted',
+        'read committed',
+        'repeatable read',
+        'serializable',
+    }
+
+    Database = mysql.connector
+    SchemaEditorClass = DatabaseSchemaEditor
+    # Classes instantiated in __init__().
+    client_class = DatabaseClient
+    creation_class = DatabaseCreation
+    features_class = DatabaseFeatures
+    introspection_class = DatabaseIntrospection
+    ops_class = DatabaseOperations
+    validation_class = DatabaseValidation
+
+    def __init__(self, *args, **kwargs):
+        super(DatabaseWrapper, self).__init__(*args, **kwargs)
+
+        try:
+            self._use_pure = self.settings_dict['OPTIONS']['use_pure']
+        except KeyError:
+            self._use_pure = not HAVE_CEXT
+
+        self.converter = DjangoMySQLConverter() \
+            if self.use_pure else DjangoCMySQLConverter()
+
+    def __getattr__(self, attr):
+        if attr.startswith("mysql_is"):
+            return False
+        raise AttributeError
+
+    def get_connection_params(self):
+        kwargs = {
+            'charset': 'utf8',
+            'use_unicode': True,
+            'buffered': False,
+            'consume_results': True,
+        }
+
+        settings_dict = self.settings_dict
+
+        if settings_dict['USER']:
+            kwargs['user'] = settings_dict['USER']
+        if settings_dict['NAME']:
+            kwargs['database'] = settings_dict['NAME']
+        if settings_dict['PASSWORD']:
+            kwargs['passwd'] = settings_dict['PASSWORD']
+        if settings_dict['HOST'].startswith('/'):
+            kwargs['unix_socket'] = settings_dict['HOST']
+        elif settings_dict['HOST']:
+            kwargs['host'] = settings_dict['HOST']
+        if settings_dict['PORT']:
+            kwargs['port'] = int(settings_dict['PORT'])
+
+        # Raise exceptions for database warnings if DEBUG is on
+        kwargs['raise_on_warnings'] = settings.DEBUG
+
+        kwargs['client_flags'] = [
+            # Need potentially affected rows on UPDATE
+            mysql.connector.constants.ClientFlag.FOUND_ROWS,
+        ]
+        try:
+            kwargs.update(settings_dict['OPTIONS'])
+        except KeyError:
+            # OPTIONS missing is OK
+            pass
+
+        return kwargs
+
+    def get_new_connection(self, conn_params):
+        if not self.use_pure:
+            conn_params['converter_class'] = DjangoCMySQLConverter
+        else:
+            conn_params['converter_class'] = DjangoMySQLConverter
+        cnx = mysql.connector.connect(**conn_params)
+
+        return cnx
+
+    def init_connection_state(self):
+        assignments = []
+        if self.features.is_sql_auto_is_null_enabled:
+            # SQL_AUTO_IS_NULL controls whether an AUTO_INCREMENT column on
+            # a recently inserted row will return when the field is tested
+            # for NULL. Disabling this brings this aspect of MySQL in line
+            # with SQL standards.
+            assignments.append('SET SQL_AUTO_IS_NULL = 0')
+
+        if assignments:
+            with self.cursor() as cursor:
+                cursor.execute('; '.join(assignments))
+
+        if 'AUTOCOMMIT' in self.settings_dict:
+            try:
+                self.set_autocommit(self.settings_dict['AUTOCOMMIT'])
+            except AttributeError:
+                self._set_autocommit(self.settings_dict['AUTOCOMMIT'])
+
+    def create_cursor(self, name=None):
+        cursor = self.connection.cursor()
+        return CursorWrapper(cursor)
+
+    def _rollback(self):
+        try:
+            BaseDatabaseWrapper._rollback(self)
+        except NotSupportedError:
+            pass
+
+    def _set_autocommit(self, autocommit):
+        with self.wrap_database_errors:
+            self.connection.autocommit = autocommit
+
+    def disable_constraint_checking(self):
+        """
+        Disable foreign key checks, primarily for use in adding rows with
+        forward references. Always return True to indicate constraint checks
+        need to be re-enabled.
+        """
+        with self.cursor() as cursor:
+            cursor.execute('SET foreign_key_checks=0')
+        return True
+
+    def enable_constraint_checking(self):
+        """
+        Re-enable foreign key checks after they have been disabled.
+        """
+        # Override needs_rollback in case constraint_checks_disabled is
+        # nested inside transaction.atomic.
+        self.needs_rollback, needs_rollback = False, self.needs_rollback
+        try:
+            with self.cursor() as cursor:
+                cursor.execute('SET foreign_key_checks=1')
+        finally:
+            self.needs_rollback = needs_rollback
+
+    def check_constraints(self, table_names=None):
+        """
+        Check each table name in `table_names` for rows with invalid foreign
+        key references. This method is intended to be used in conjunction with
+        `disable_constraint_checking()` and `enable_constraint_checking()`, to
+        determine if rows with invalid references were entered while constraint
+        checks were off.
+        """
+        with self.cursor() as cursor:
+            if table_names is None:
+                table_names = self.introspection.table_names(cursor)
+            for table_name in table_names:
+                primary_key_column_name = self.introspection.get_primary_key_column(cursor, table_name)
+                if not primary_key_column_name:
+                    continue
+                key_columns = self.introspection.get_key_columns(cursor, table_name)
+                for column_name, referenced_table_name, referenced_column_name in key_columns:
+                    cursor.execute(
+                        """
+                        SELECT REFERRING.`%s`, REFERRING.`%s` FROM `%s` as REFERRING
+                        LEFT JOIN `%s` as REFERRED
+                        ON (REFERRING.`%s` = REFERRED.`%s`)
+                        WHERE REFERRING.`%s` IS NOT NULL AND REFERRED.`%s` IS NULL
+                        """ % (
+                            primary_key_column_name, column_name, table_name,
+                            referenced_table_name, column_name, referenced_column_name,
+                            column_name, referenced_column_name,
+                        )
+                    )
+                    for bad_row in cursor.fetchall():
+                        raise IntegrityError(
+                            "The row in table '%s' with primary key '%s' has an invalid "
+                            "foreign key: %s.%s contains a value '%s' that does not "
+                            "have a corresponding value in %s.%s."
+                            % (
+                                table_name, bad_row[0], table_name, column_name,
+                                bad_row[1], referenced_table_name, referenced_column_name,
+                            )
+                        )
+
+    def is_usable(self):
+        try:
+            self.connection.ping()
+        except Error:
+            return False
+        else:
+            return True
+
+    @cached_property
+    def display_name(self):
+        return 'MySQL'
+
+    @cached_property
+    def data_type_check_constraints(self):
+        if self.features.supports_column_check_constraints:
+            check_constraints = {
+                'PositiveBigIntegerField': '`%(column)s` >= 0',
+                'PositiveIntegerField': '`%(column)s` >= 0',
+                'PositiveSmallIntegerField': '`%(column)s` >= 0',
+            }
+            return check_constraints
+        return {}
+
+    @cached_property
+    def mysql_server_info(self):
+        with self.temporary_connection() as cursor:
+            cursor.execute('SELECT VERSION()')
+            return cursor.fetchone()[0]
+
+    @cached_property
+    def mysql_version(self):
+        config = self.get_connection_params()
+        with mysql.connector.connect(**config) as conn:
+            server_version = conn.get_server_version()
+        return server_version
+
+    @cached_property
+    def sql_mode(self):
+        with self.cursor() as cursor:
+            cursor.execute('SELECT @@sql_mode')
+            sql_mode = cursor.fetchone()
+        return set(sql_mode[0].split(',') if sql_mode else ())
+
+    @property
+    def use_pure(self):
+        return self._use_pure
+        # return not HAVE_CEXT or self._use_pure
+
+
+class DjangoMySQLConverter(MySQLConverter):
+    """Custom converter for Django for MySQLConnection"""
+    def _TIME_to_python(self, value, dsc=None):
+        """Return MySQL TIME data type as datetime.time()
+
+        Returns datetime.time()
+        """
+        return dateparse.parse_time(value.decode('utf-8'))
+
+    def __DATETIME_to_python(self, value, dsc=None):
+        """Connector/Python always returns naive datetime.datetime
+
+        Connector/Python always returns naive timestamps since MySQL has
+        no time zone support. Since Django needs non-naive, we need to add
+        the UTC time zone.
+
+        Returns datetime.datetime()
+        """
+        if not value:
+            return None
+        dt = MySQLConverter._DATETIME_to_python(self, value)
+        if dt is None:
+            return None
+        if settings.USE_TZ and timezone.is_naive(dt):
+            dt = dt.replace(tzinfo=timezone.utc)
+        return dt
+
+    def _safestring_to_mysql(self, value):
+        return self._str_to_mysql(value)
+
+    def _safetext_to_mysql(self, value):
+        return self._str_to_mysql(value)
+
+    def _safebytes_to_mysql(self, value):
+        return self._bytes_to_mysql(value)
+
+
+class DjangoCMySQLConverter(MySQLConverterBase):
+    """Custom converter for Django for CMySQLConnection"""
+    def _TIME_to_python(self, value, dsc=None):
+        """Return MySQL TIME data type as datetime.time()
+
+        Returns datetime.time()
+        """
+        return dateparse.parse_time(str(value))
+
+    def __DATETIME_to_python(self, value, dsc=None):
+        """Connector/Python always returns naive datetime.datetime
+
+        Connector/Python always returns naive timestamps since MySQL has
+        no time zone support. Since Django needs non-naive, we need to add
+        the UTC time zone.
+
+        Returns datetime.datetime()
+        """
+        if not value:
+            return None
+        if settings.USE_TZ and timezone.is_naive(value):
+            value = value.replace(tzinfo=timezone.utc)
+        return value
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/client.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/client.py
new file mode 100644
index 0000000..8bf8fa8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/client.py
@@ -0,0 +1,79 @@
+# Copyright (c) 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+import subprocess
+
+from django.db.backends.base.client import BaseDatabaseClient
+
+
+class DatabaseClient(BaseDatabaseClient):
+    executable_name = 'mysql'
+
+    @classmethod
+    def settings_to_cmd_args(cls, settings_dict):
+        args = [cls.executable_name]
+
+        db = settings_dict['OPTIONS'].get('database', settings_dict['NAME'])
+        user = settings_dict['OPTIONS'].get('user',
+                                            settings_dict['USER'])
+        passwd = settings_dict['OPTIONS'].get('password',
+                                              settings_dict['PASSWORD'])
+        host = settings_dict['OPTIONS'].get('host', settings_dict['HOST'])
+        port = settings_dict['OPTIONS'].get('port', settings_dict['PORT'])
+        defaults_file = settings_dict['OPTIONS'].get('read_default_file')
+
+        # --defaults-file should always be the first option
+        if defaults_file:
+            args.append('--defaults-file={0}'.format(defaults_file))
+
+        # We force SQL_MODE to TRADITIONAL
+        args.append('--init-command=SET @@session.SQL_MODE=TRADITIONAL')
+
+        if user:
+            args.append('--user={0}'.format(user))
+        if passwd:
+            args.append('--password={0}'.format(passwd))
+
+        if host:
+            if '/' in host:
+                args.append('--socket={0}'.format(host))
+            else:
+                args.append('--host={0}'.format(host))
+
+        if port:
+            args.append('--port={0}'.format(port))
+
+        if db:
+            args.append('--database={0}'.format(db))
+
+        return args
+
+    def runshell(self):
+        args = DatabaseClient.settings_to_cmd_args(
+            self.connection.settings_dict)
+        subprocess.call(args)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/compiler.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/compiler.py
new file mode 100644
index 0000000..b5fc0cc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/compiler.py
@@ -0,0 +1,35 @@
+# Copyright (c) 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+from django.db.backends.mysql.compiler import (
+    SQLCompiler,
+    SQLInsertCompiler,
+    SQLDeleteCompiler,
+    SQLUpdateCompiler,
+    SQLAggregateCompiler
+)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/creation.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/creation.py
new file mode 100644
index 0000000..8cc9d48
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/creation.py
@@ -0,0 +1,29 @@
+# Copyright (c) 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+from django.db.backends.mysql.creation import DatabaseCreation
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/features.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/features.py
new file mode 100644
index 0000000..6a8c84e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/features.py
@@ -0,0 +1,44 @@
+# Copyright (c) 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+from django.db.backends.mysql.features import DatabaseFeatures as MySQLDatabaseFeatures
+from django.utils.functional import cached_property
+
+
+class DatabaseFeatures(MySQLDatabaseFeatures):
+    empty_fetchmany_value = []
+
+    @cached_property
+    def can_introspect_check_constraints(self):
+        return self.connection.mysql_version >= (8, 0, 16)
+
+    @cached_property
+    def supports_microsecond_precision(self):
+        if self.connection.mysql_version >= (5, 6, 3):
+            return True
+        return False
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/introspection.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/introspection.py
new file mode 100644
index 0000000..f6247a0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/introspection.py
@@ -0,0 +1,353 @@
+# Copyright (c) 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+from collections import namedtuple
+
+import sqlparse
+
+from mysql.connector.constants import FieldType
+
+from django.db.backends.base.introspection import (
+    BaseDatabaseIntrospection, FieldInfo as BaseFieldInfo, TableInfo,
+)
+from django.db.models import Index
+from django.utils.datastructures import OrderedSet
+
+FieldInfo = namedtuple('FieldInfo', BaseFieldInfo._fields + ('extra', 'is_unsigned', 'has_json_constraint'))
+InfoLine = namedtuple('InfoLine', 'col_name data_type max_len num_prec num_scale extra column_default is_unsigned')
+
+
+class DatabaseIntrospection(BaseDatabaseIntrospection):
+    data_types_reverse = {
+        FieldType.BLOB: 'TextField',
+        FieldType.DECIMAL: 'DecimalField',
+        FieldType.NEWDECIMAL: 'DecimalField',
+        FieldType.DATE: 'DateField',
+        FieldType.DATETIME: 'DateTimeField',
+        FieldType.DOUBLE: 'FloatField',
+        FieldType.FLOAT: 'FloatField',
+        FieldType.INT24: 'IntegerField',
+        FieldType.JSON: 'JSONField',
+        FieldType.LONG: 'IntegerField',
+        FieldType.LONGLONG: 'BigIntegerField',
+        FieldType.SHORT: 'SmallIntegerField',
+        FieldType.STRING: 'CharField',
+        FieldType.TIME: 'TimeField',
+        FieldType.TIMESTAMP: 'DateTimeField',
+        FieldType.TINY: 'IntegerField',
+        FieldType.TINY_BLOB: 'TextField',
+        FieldType.MEDIUM_BLOB: 'TextField',
+        FieldType.LONG_BLOB: 'TextField',
+        FieldType.VAR_STRING: 'CharField',
+    }
+
+    def get_field_type(self, data_type, description):
+        field_type = super().get_field_type(data_type, description)
+        if 'auto_increment' in description.extra:
+            if field_type == 'IntegerField':
+                return 'AutoField'
+            elif field_type == 'BigIntegerField':
+                return 'BigAutoField'
+            elif field_type == 'SmallIntegerField':
+                return 'SmallAutoField'
+        if description.is_unsigned:
+            if field_type == 'BigIntegerField':
+                return 'PositiveBigIntegerField'
+            elif field_type == 'IntegerField':
+                return 'PositiveIntegerField'
+            elif field_type == 'SmallIntegerField':
+                return 'PositiveSmallIntegerField'
+        # JSON data type is an alias for LONGTEXT in MariaDB, use check
+        # constraints clauses to introspect JSONField.
+        if description.has_json_constraint:
+            return 'JSONField'
+        return field_type
+
+    def get_table_list(self, cursor):
+        """Return a list of table and view names in the current database."""
+        cursor.execute("SHOW FULL TABLES")
+        return [TableInfo(row[0], {'BASE TABLE': 't', 'VIEW': 'v'}.get(row[1]))
+                for row in cursor.fetchall()]
+
+    def get_table_description(self, cursor, table_name):
+        """
+        Return a description of the table with the DB-API cursor.description
+        interface."
+        """
+        json_constraints = {}
+        if self.connection.mysql_is_mariadb and self.connection.features.can_introspect_json_field:
+            # JSON data type is an alias for LONGTEXT in MariaDB, select
+            # JSON_VALID() constraints to introspect JSONField.
+            cursor.execute("""
+                SELECT c.constraint_name AS column_name
+                FROM information_schema.check_constraints AS c
+                WHERE
+                    c.table_name = %s AND
+                    LOWER(c.check_clause) = 'json_valid(`' + LOWER(c.constraint_name) + '`)' AND
+                    c.constraint_schema = DATABASE()
+            """, [table_name])
+            json_constraints = {row[0] for row in cursor.fetchall()}
+        # information_schema database gives more accurate results for some figures:
+        # - varchar length returned by cursor.description is an internal length,
+        #   not visible length (#5725)
+        # - precision and scale (for decimal fields) (#5014)
+        # - auto_increment is not available in cursor.description
+        cursor.execute("""
+            SELECT
+                column_name, data_type, character_maximum_length,
+                numeric_precision, numeric_scale, extra, column_default,
+                CASE
+                    WHEN column_type LIKE '%% unsigned' THEN 1
+                    ELSE 0
+                END AS is_unsigned
+            FROM information_schema.columns
+            WHERE table_name = %s AND table_schema = DATABASE()""", [table_name])
+        field_info = {line[0]: InfoLine(*line) for line in cursor.fetchall()}
+
+        cursor.execute("SELECT * FROM %s LIMIT 1" % self.connection.ops.quote_name(table_name))
+
+        def to_int(i):
+            return int(i) if i is not None else i
+
+        fields = []
+        for line in cursor.description:
+            info = field_info[line[0]]
+            name, type_code, display_size = line[:3]
+            fields.append(FieldInfo(
+                name,
+                type_code,
+                display_size,
+                to_int(info.max_len) or line[3],
+                to_int(info.num_prec) or line[4],
+                to_int(info.num_scale) or line[5],
+                line[6],
+                info.column_default,
+                info.extra,
+                info.is_unsigned,
+                line[0] in json_constraints
+            ))
+        return fields
+
+    def get_sequences(self, cursor, table_name, table_fields=()):
+        for field_info in self.get_table_description(cursor, table_name):
+            if 'auto_increment' in field_info.extra:
+                # MySQL allows only one auto-increment column per table.
+                return [{'table': table_name, 'column': field_info.name}]
+        return []
+
+    def get_relations(self, cursor, table_name):
+        """
+        Return a dictionary of {field_name: (field_name_other_table, other_table)}
+        representing all relationships to the given table.
+        """
+        constraints = self.get_key_columns(cursor, table_name)
+        relations = {}
+        for my_fieldname, other_table, other_field in constraints:
+            relations[my_fieldname] = (other_field, other_table)
+        return relations
+
+    def get_key_columns(self, cursor, table_name):
+        """
+        Return a list of (column_name, referenced_table_name, referenced_column_name)
+        for all key columns in the given table.
+        """
+        key_columns = []
+        cursor.execute("""
+            SELECT column_name, referenced_table_name, referenced_column_name
+            FROM information_schema.key_column_usage
+            WHERE table_name = %s
+                AND table_schema = DATABASE()
+                AND referenced_table_name IS NOT NULL
+                AND referenced_column_name IS NOT NULL""", [table_name])
+        key_columns.extend(cursor.fetchall())
+        return key_columns
+
+    def get_indexes(self, cursor, table_name):
+        cursor.execute("SHOW INDEX FROM {0}"
+                       "".format(self.connection.ops.quote_name(table_name)))
+        # Do a two-pass search for indexes: on first pass check which indexes
+        # are multicolumn, on second pass check which single-column indexes
+        # are present.
+        rows = list(cursor.fetchall())
+        multicol_indexes = set()
+        for row in rows:
+            if row[3] > 1:
+                multicol_indexes.add(row[2])
+        indexes = {}
+        for row in rows:
+            if row[2] in multicol_indexes:
+                continue
+            if row[4] not in indexes:
+                indexes[row[4]] = {'primary_key': False, 'unique': False}
+            # It's possible to have the unique and PK constraints in
+            # separate indexes.
+            if row[2] == 'PRIMARY':
+                indexes[row[4]]['primary_key'] = True
+            if not row[1]:
+                indexes[row[4]]['unique'] = True
+        return indexes
+
+    def get_primary_key_column(self, cursor, table_name):
+        """
+        Returns the name of the primary key column for the given table
+        """
+        for column in self.get_indexes(cursor, table_name).items():
+            if column[1]['primary_key']:
+                return column[0]
+        return None
+
+    def get_storage_engine(self, cursor, table_name):
+        """
+        Retrieve the storage engine for a given table. Return the default
+        storage engine if the table doesn't exist.
+        """
+        cursor.execute(
+            "SELECT engine "
+            "FROM information_schema.tables "
+            "WHERE table_name = %s", [table_name])
+        result = cursor.fetchone()
+        if not result:
+            return self.connection.features._mysql_storage_engine
+        return result[0]
+
+    def _parse_constraint_columns(self, check_clause, columns):
+        check_columns = OrderedSet()
+        statement = sqlparse.parse(check_clause)[0]
+        tokens = (token for token in statement.flatten() if not token.is_whitespace)
+        for token in tokens:
+            if (
+                token.ttype == sqlparse.tokens.Name and
+                self.connection.ops.quote_name(token.value) == token.value and
+                token.value[1:-1] in columns
+            ):
+                check_columns.add(token.value[1:-1])
+        return check_columns
+
+    def get_constraints(self, cursor, table_name):
+        """
+        Retrieve any constraints or keys (unique, pk, fk, check, index) across
+        one or more columns.
+        """
+        constraints = {}
+        # Get the actual constraint names and columns
+        name_query = """
+            SELECT kc.`constraint_name`, kc.`column_name`,
+                kc.`referenced_table_name`, kc.`referenced_column_name`
+            FROM information_schema.key_column_usage AS kc
+            WHERE
+                kc.table_schema = DATABASE() AND
+                kc.table_name = %s
+            ORDER BY kc.`ordinal_position`
+        """
+        cursor.execute(name_query, [table_name])
+        for constraint, column, ref_table, ref_column in cursor.fetchall():
+            if constraint not in constraints:
+                constraints[constraint] = {
+                    'columns': OrderedSet(),
+                    'primary_key': False,
+                    'unique': False,
+                    'index': False,
+                    'check': False,
+                    'foreign_key': (ref_table, ref_column) if ref_column else None,
+                }
+            constraints[constraint]['columns'].add(column)
+        # Now get the constraint types
+        type_query = """
+            SELECT c.constraint_name, c.constraint_type
+            FROM information_schema.table_constraints AS c
+            WHERE
+                c.table_schema = DATABASE() AND
+                c.table_name = %s
+        """
+        cursor.execute(type_query, [table_name])
+        for constraint, kind in cursor.fetchall():
+            if kind.lower() == "primary key":
+                constraints[constraint]['primary_key'] = True
+                constraints[constraint]['unique'] = True
+            elif kind.lower() == "unique":
+                constraints[constraint]['unique'] = True
+        # Add check constraints.
+        if self.connection.features.can_introspect_check_constraints:
+            unnamed_constraints_index = 0
+            columns = {info.name for info in self.get_table_description(cursor, table_name)}
+            if self.connection.mysql_is_mariadb:
+                type_query = """
+                    SELECT c.constraint_name, c.check_clause
+                    FROM information_schema.check_constraints AS c
+                    WHERE
+                        c.constraint_schema = DATABASE() AND
+                        c.table_name = %s
+                """
+            else:
+                type_query = """
+                    SELECT cc.constraint_name, cc.check_clause
+                    FROM
+                        information_schema.check_constraints AS cc,
+                        information_schema.table_constraints AS tc
+                    WHERE
+                        cc.constraint_schema = DATABASE() AND
+                        tc.table_schema = cc.constraint_schema AND
+                        cc.constraint_name = tc.constraint_name AND
+                        tc.constraint_type = 'CHECK' AND
+                        tc.table_name = %s
+                """
+            cursor.execute(type_query, [table_name])
+            for constraint, check_clause in cursor.fetchall():
+                constraint_columns = self._parse_constraint_columns(check_clause, columns)
+                # Ensure uniqueness of unnamed constraints. Unnamed unique
+                # and check columns constraints have the same name as
+                # a column.
+                if set(constraint_columns) == {constraint}:
+                    unnamed_constraints_index += 1
+                    constraint = '__unnamed_constraint_%s__' % unnamed_constraints_index
+                constraints[constraint] = {
+                    'columns': constraint_columns,
+                    'primary_key': False,
+                    'unique': False,
+                    'index': False,
+                    'check': True,
+                    'foreign_key': None,
+                }
+        # Now add in the indexes
+        cursor.execute("SHOW INDEX FROM %s" % self.connection.ops.quote_name(table_name))
+        for table, non_unique, index, colseq, column, type_ in [x[:5] + (x[10],) for x in cursor.fetchall()]:
+            if index not in constraints:
+                constraints[index] = {
+                    'columns': OrderedSet(),
+                    'primary_key': False,
+                    'unique': False,
+                    'check': False,
+                    'foreign_key': None,
+                }
+            constraints[index]['index'] = True
+            constraints[index]['type'] = Index.suffix if type_ == 'BTREE' else type_.lower()
+            constraints[index]['columns'].add(column)
+        # Convert the sorted sets to lists
+        for constraint in constraints.values():
+            constraint['columns'] = list(constraint['columns'])
+        return constraints
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/operations.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/operations.py
new file mode 100644
index 0000000..af57b32
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/operations.py
@@ -0,0 +1,144 @@
+# Copyright (c) 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+from django.db.backends.mysql.operations import DatabaseOperations as MySQLDatabaseOperations
+from django.conf import settings
+from django.utils import timezone
+
+try:
+    from _mysql_connector import datetime_to_mysql, time_to_mysql
+except ImportError:
+    HAVE_CEXT = False
+else:
+    HAVE_CEXT = True
+
+
+class DatabaseOperations(MySQLDatabaseOperations):
+    compiler_module = "mysql.connector.django.compiler"
+
+    def date_trunc_sql(self, lookup_type, field_name):
+        fields = {
+            'year': '%Y-01-01',
+            'month': '%Y-%m-01',
+        }  # Use double percents to escape.
+        if lookup_type in fields:
+            format_str = fields[lookup_type]
+            return "CAST(DATE_FORMAT(%s, '%s') AS DATE)" % (field_name, format_str)
+        elif lookup_type == 'quarter':
+            return "MAKEDATE(YEAR(%s), 1) + INTERVAL QUARTER(%s) QUARTER - INTERVAL 1 QUARTER" % (
+                field_name, field_name
+            )
+        elif lookup_type == 'week':
+            return "DATE_SUB(%s, INTERVAL WEEKDAY(%s) DAY)" % (
+                field_name, field_name
+            )
+        else:
+            return "DATE(%s)" % (field_name)
+
+    def datetime_trunc_sql(self, lookup_type, field_name, tzname):
+        field_name = self._convert_field_to_tz(field_name, tzname)
+        fields = ['year', 'month', 'day', 'hour', 'minute', 'second']
+        format = ('%Y-', '%m', '-%d', ' %H:', '%i', ':%s')
+        format_def = ('0000-', '01', '-01', ' 00:', '00', ':00')
+        if lookup_type == 'quarter':
+            return (
+                "CAST(DATE_FORMAT(MAKEDATE(YEAR({field_name}), 1) + "
+                "INTERVAL QUARTER({field_name}) QUARTER - " +
+                "INTERVAL 1 QUARTER, '%Y-%m-01 00:00:00') AS DATETIME)"
+            ).format(field_name=field_name)
+        if lookup_type == 'week':
+            return (
+                "CAST(DATE_FORMAT(DATE_SUB({field_name}, "
+                "INTERVAL WEEKDAY({field_name}) DAY), "
+                "'%Y-%m-%d 00:00:00') AS DATETIME)"
+            ).format(field_name=field_name)
+        try:
+            i = fields.index(lookup_type) + 1
+        except ValueError:
+            sql = field_name
+        else:
+            format_str = ''.join(format[:i] + format_def[i:])
+            sql = "CAST(DATE_FORMAT(%s, '%s') AS DATETIME)" % (field_name, format_str)
+        return sql
+
+    def time_trunc_sql(self, lookup_type, field_name):
+        fields = {
+            'hour': '%H:00:00',
+            'minute': '%H:%i:00',
+            'second': '%H:%i:%s',
+        }  # Use double percents to escape.
+        if lookup_type in fields:
+            format_str = fields[lookup_type]
+            return "CAST(DATE_FORMAT(%s, '%s') AS TIME)" % (field_name, format_str)
+        else:
+            return "TIME(%s)" % (field_name)
+
+    def regex_lookup(self, lookup_type):
+        if self.connection.mysql_version < (8, 0, 0):
+            if lookup_type == 'regex':
+                return '%s REGEXP BINARY %s'
+            return '%s REGEXP %s'
+
+        match_option = 'c' if lookup_type == 'regex' else 'i'
+        return "REGEXP_LIKE(%s, %s, '%s')" % match_option
+
+    def adapt_datetimefield_value(self, value):
+        return self.value_to_db_datetime(value)
+
+    def value_to_db_datetime(self, value):
+        if value is None:
+            return None
+        # MySQL doesn't support tz-aware times
+        if timezone.is_aware(value):
+            if settings.USE_TZ:
+                value = value.astimezone(timezone.utc).replace(tzinfo=None)
+            else:
+                raise ValueError(
+                    "MySQL backend does not support timezone-aware times."
+                )
+        if not self.connection.features.supports_microsecond_precision:
+            value = value.replace(microsecond=0)
+        if not self.connection.use_pure:
+            return datetime_to_mysql(value)
+        return self.connection.converter.to_mysql(value)
+
+    def adapt_timefield_value(self, value):
+        return self.value_to_db_time(value)
+
+    def value_to_db_time(self, value):
+        if value is None:
+            return None
+
+        # MySQL doesn't support tz-aware times
+        if timezone.is_aware(value):
+            raise ValueError("MySQL backend does not support timezone-aware "
+                             "times.")
+
+        if not self.connection.use_pure:
+            return time_to_mysql(value)
+        return self.connection.converter.to_mysql(value)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/schema.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/schema.py
new file mode 100644
index 0000000..7696728
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/schema.py
@@ -0,0 +1,41 @@
+# Copyright (c) 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+from django.db.backends.mysql.schema import DatabaseSchemaEditor as MySQLDatabaseSchemaEditor
+
+
+class DatabaseSchemaEditor(MySQLDatabaseSchemaEditor):
+
+    def quote_value(self, value):
+        self.connection.ensure_connection()
+        if isinstance(value, str):
+            value = value.replace('%', '%%')
+        quoted = self.connection.connection.converter.escape(value)
+        if isinstance(value, str) and isinstance(quoted, bytes):
+            quoted = quoted.decode()
+        return quoted
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/validation.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/validation.py
new file mode 100644
index 0000000..20c285e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/django/validation.py
@@ -0,0 +1,29 @@
+# Copyright (c) 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+from django.db.backends.mysql.validation import DatabaseValidation
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/errorcode.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/errorcode.py
new file mode 100644
index 0000000..ecc1470
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/errorcode.py
@@ -0,0 +1,4611 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# This file was auto-generated.
+_GENERATED_ON = '2018-03-16'
+_MYSQL_VERSION = (8, 0, 11)
+
+"""This module contains the MySQL Server and Client error codes"""
+
+# Start MySQL Errors
+OBSOLETE_ER_HASHCHK = 1000
+OBSOLETE_ER_NISAMCHK = 1001
+ER_NO = 1002
+ER_YES = 1003
+ER_CANT_CREATE_FILE = 1004
+ER_CANT_CREATE_TABLE = 1005
+ER_CANT_CREATE_DB = 1006
+ER_DB_CREATE_EXISTS = 1007
+ER_DB_DROP_EXISTS = 1008
+OBSOLETE_ER_DB_DROP_DELETE = 1009
+ER_DB_DROP_RMDIR = 1010
+OBSOLETE_ER_CANT_DELETE_FILE = 1011
+ER_CANT_FIND_SYSTEM_REC = 1012
+ER_CANT_GET_STAT = 1013
+OBSOLETE_ER_CANT_GET_WD = 1014
+ER_CANT_LOCK = 1015
+ER_CANT_OPEN_FILE = 1016
+ER_FILE_NOT_FOUND = 1017
+ER_CANT_READ_DIR = 1018
+OBSOLETE_ER_CANT_SET_WD = 1019
+ER_CHECKREAD = 1020
+OBSOLETE_ER_DISK_FULL = 1021
+ER_DUP_KEY = 1022
+OBSOLETE_ER_ERROR_ON_CLOSE = 1023
+ER_ERROR_ON_READ = 1024
+ER_ERROR_ON_RENAME = 1025
+ER_ERROR_ON_WRITE = 1026
+ER_FILE_USED = 1027
+ER_FILSORT_ABORT = 1028
+OBSOLETE_ER_FORM_NOT_FOUND = 1029
+ER_GET_ERRNO = 1030
+ER_ILLEGAL_HA = 1031
+ER_KEY_NOT_FOUND = 1032
+ER_NOT_FORM_FILE = 1033
+ER_NOT_KEYFILE = 1034
+ER_OLD_KEYFILE = 1035
+ER_OPEN_AS_READONLY = 1036
+ER_OUTOFMEMORY = 1037
+ER_OUT_OF_SORTMEMORY = 1038
+OBSOLETE_ER_UNEXPECTED_EOF = 1039
+ER_CON_COUNT_ERROR = 1040
+ER_OUT_OF_RESOURCES = 1041
+ER_BAD_HOST_ERROR = 1042
+ER_HANDSHAKE_ERROR = 1043
+ER_DBACCESS_DENIED_ERROR = 1044
+ER_ACCESS_DENIED_ERROR = 1045
+ER_NO_DB_ERROR = 1046
+ER_UNKNOWN_COM_ERROR = 1047
+ER_BAD_NULL_ERROR = 1048
+ER_BAD_DB_ERROR = 1049
+ER_TABLE_EXISTS_ERROR = 1050
+ER_BAD_TABLE_ERROR = 1051
+ER_NON_UNIQ_ERROR = 1052
+ER_SERVER_SHUTDOWN = 1053
+ER_BAD_FIELD_ERROR = 1054
+ER_WRONG_FIELD_WITH_GROUP = 1055
+ER_WRONG_GROUP_FIELD = 1056
+ER_WRONG_SUM_SELECT = 1057
+ER_WRONG_VALUE_COUNT = 1058
+ER_TOO_LONG_IDENT = 1059
+ER_DUP_FIELDNAME = 1060
+ER_DUP_KEYNAME = 1061
+ER_DUP_ENTRY = 1062
+ER_WRONG_FIELD_SPEC = 1063
+ER_PARSE_ERROR = 1064
+ER_EMPTY_QUERY = 1065
+ER_NONUNIQ_TABLE = 1066
+ER_INVALID_DEFAULT = 1067
+ER_MULTIPLE_PRI_KEY = 1068
+ER_TOO_MANY_KEYS = 1069
+ER_TOO_MANY_KEY_PARTS = 1070
+ER_TOO_LONG_KEY = 1071
+ER_KEY_COLUMN_DOES_NOT_EXITS = 1072
+ER_BLOB_USED_AS_KEY = 1073
+ER_TOO_BIG_FIELDLENGTH = 1074
+ER_WRONG_AUTO_KEY = 1075
+ER_READY = 1076
+OBSOLETE_ER_NORMAL_SHUTDOWN = 1077
+OBSOLETE_ER_GOT_SIGNAL = 1078
+ER_SHUTDOWN_COMPLETE = 1079
+ER_FORCING_CLOSE = 1080
+ER_IPSOCK_ERROR = 1081
+ER_NO_SUCH_INDEX = 1082
+ER_WRONG_FIELD_TERMINATORS = 1083
+ER_BLOBS_AND_NO_TERMINATED = 1084
+ER_TEXTFILE_NOT_READABLE = 1085
+ER_FILE_EXISTS_ERROR = 1086
+ER_LOAD_INFO = 1087
+ER_ALTER_INFO = 1088
+ER_WRONG_SUB_KEY = 1089
+ER_CANT_REMOVE_ALL_FIELDS = 1090
+ER_CANT_DROP_FIELD_OR_KEY = 1091
+ER_INSERT_INFO = 1092
+ER_UPDATE_TABLE_USED = 1093
+ER_NO_SUCH_THREAD = 1094
+ER_KILL_DENIED_ERROR = 1095
+ER_NO_TABLES_USED = 1096
+ER_TOO_BIG_SET = 1097
+ER_NO_UNIQUE_LOGFILE = 1098
+ER_TABLE_NOT_LOCKED_FOR_WRITE = 1099
+ER_TABLE_NOT_LOCKED = 1100
+ER_BLOB_CANT_HAVE_DEFAULT = 1101
+ER_WRONG_DB_NAME = 1102
+ER_WRONG_TABLE_NAME = 1103
+ER_TOO_BIG_SELECT = 1104
+ER_UNKNOWN_ERROR = 1105
+ER_UNKNOWN_PROCEDURE = 1106
+ER_WRONG_PARAMCOUNT_TO_PROCEDURE = 1107
+ER_WRONG_PARAMETERS_TO_PROCEDURE = 1108
+ER_UNKNOWN_TABLE = 1109
+ER_FIELD_SPECIFIED_TWICE = 1110
+ER_INVALID_GROUP_FUNC_USE = 1111
+ER_UNSUPPORTED_EXTENSION = 1112
+ER_TABLE_MUST_HAVE_COLUMNS = 1113
+ER_RECORD_FILE_FULL = 1114
+ER_UNKNOWN_CHARACTER_SET = 1115
+ER_TOO_MANY_TABLES = 1116
+ER_TOO_MANY_FIELDS = 1117
+ER_TOO_BIG_ROWSIZE = 1118
+ER_STACK_OVERRUN = 1119
+ER_WRONG_OUTER_JOIN_UNUSED = 1120
+ER_NULL_COLUMN_IN_INDEX = 1121
+ER_CANT_FIND_UDF = 1122
+ER_CANT_INITIALIZE_UDF = 1123
+ER_UDF_NO_PATHS = 1124
+ER_UDF_EXISTS = 1125
+ER_CANT_OPEN_LIBRARY = 1126
+ER_CANT_FIND_DL_ENTRY = 1127
+ER_FUNCTION_NOT_DEFINED = 1128
+ER_HOST_IS_BLOCKED = 1129
+ER_HOST_NOT_PRIVILEGED = 1130
+ER_PASSWORD_ANONYMOUS_USER = 1131
+ER_PASSWORD_NOT_ALLOWED = 1132
+ER_PASSWORD_NO_MATCH = 1133
+ER_UPDATE_INFO = 1134
+ER_CANT_CREATE_THREAD = 1135
+ER_WRONG_VALUE_COUNT_ON_ROW = 1136
+ER_CANT_REOPEN_TABLE = 1137
+ER_INVALID_USE_OF_NULL = 1138
+ER_REGEXP_ERROR = 1139
+ER_MIX_OF_GROUP_FUNC_AND_FIELDS = 1140
+ER_NONEXISTING_GRANT = 1141
+ER_TABLEACCESS_DENIED_ERROR = 1142
+ER_COLUMNACCESS_DENIED_ERROR = 1143
+ER_ILLEGAL_GRANT_FOR_TABLE = 1144
+ER_GRANT_WRONG_HOST_OR_USER = 1145
+ER_NO_SUCH_TABLE = 1146
+ER_NONEXISTING_TABLE_GRANT = 1147
+ER_NOT_ALLOWED_COMMAND = 1148
+ER_SYNTAX_ERROR = 1149
+OBSOLETE_ER_UNUSED1 = 1150
+OBSOLETE_ER_UNUSED2 = 1151
+ER_ABORTING_CONNECTION = 1152
+ER_NET_PACKET_TOO_LARGE = 1153
+ER_NET_READ_ERROR_FROM_PIPE = 1154
+ER_NET_FCNTL_ERROR = 1155
+ER_NET_PACKETS_OUT_OF_ORDER = 1156
+ER_NET_UNCOMPRESS_ERROR = 1157
+ER_NET_READ_ERROR = 1158
+ER_NET_READ_INTERRUPTED = 1159
+ER_NET_ERROR_ON_WRITE = 1160
+ER_NET_WRITE_INTERRUPTED = 1161
+ER_TOO_LONG_STRING = 1162
+ER_TABLE_CANT_HANDLE_BLOB = 1163
+ER_TABLE_CANT_HANDLE_AUTO_INCREMENT = 1164
+OBSOLETE_ER_UNUSED3 = 1165
+ER_WRONG_COLUMN_NAME = 1166
+ER_WRONG_KEY_COLUMN = 1167
+ER_WRONG_MRG_TABLE = 1168
+ER_DUP_UNIQUE = 1169
+ER_BLOB_KEY_WITHOUT_LENGTH = 1170
+ER_PRIMARY_CANT_HAVE_NULL = 1171
+ER_TOO_MANY_ROWS = 1172
+ER_REQUIRES_PRIMARY_KEY = 1173
+OBSOLETE_ER_NO_RAID_COMPILED = 1174
+ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE = 1175
+ER_KEY_DOES_NOT_EXITS = 1176
+ER_CHECK_NO_SUCH_TABLE = 1177
+ER_CHECK_NOT_IMPLEMENTED = 1178
+ER_CANT_DO_THIS_DURING_AN_TRANSACTION = 1179
+ER_ERROR_DURING_COMMIT = 1180
+ER_ERROR_DURING_ROLLBACK = 1181
+ER_ERROR_DURING_FLUSH_LOGS = 1182
+OBSOLETE_ER_ERROR_DURING_CHECKPOINT = 1183
+ER_NEW_ABORTING_CONNECTION = 1184
+OBSOLETE_ER_DUMP_NOT_IMPLEMENTED = 1185
+OBSOLETE_ER_FLUSH_MASTER_BINLOG_CLOSED = 1186
+OBSOLETE_ER_INDEX_REBUILD = 1187
+ER_MASTER = 1188
+ER_MASTER_NET_READ = 1189
+ER_MASTER_NET_WRITE = 1190
+ER_FT_MATCHING_KEY_NOT_FOUND = 1191
+ER_LOCK_OR_ACTIVE_TRANSACTION = 1192
+ER_UNKNOWN_SYSTEM_VARIABLE = 1193
+ER_CRASHED_ON_USAGE = 1194
+ER_CRASHED_ON_REPAIR = 1195
+ER_WARNING_NOT_COMPLETE_ROLLBACK = 1196
+ER_TRANS_CACHE_FULL = 1197
+OBSOLETE_ER_SLAVE_MUST_STOP = 1198
+ER_SLAVE_NOT_RUNNING = 1199
+ER_BAD_SLAVE = 1200
+ER_MASTER_INFO = 1201
+ER_SLAVE_THREAD = 1202
+ER_TOO_MANY_USER_CONNECTIONS = 1203
+ER_SET_CONSTANTS_ONLY = 1204
+ER_LOCK_WAIT_TIMEOUT = 1205
+ER_LOCK_TABLE_FULL = 1206
+ER_READ_ONLY_TRANSACTION = 1207
+OBSOLETE_ER_DROP_DB_WITH_READ_LOCK = 1208
+OBSOLETE_ER_CREATE_DB_WITH_READ_LOCK = 1209
+ER_WRONG_ARGUMENTS = 1210
+ER_NO_PERMISSION_TO_CREATE_USER = 1211
+OBSOLETE_ER_UNION_TABLES_IN_DIFFERENT_DIR = 1212
+ER_LOCK_DEADLOCK = 1213
+ER_TABLE_CANT_HANDLE_FT = 1214
+ER_CANNOT_ADD_FOREIGN = 1215
+ER_NO_REFERENCED_ROW = 1216
+ER_ROW_IS_REFERENCED = 1217
+ER_CONNECT_TO_MASTER = 1218
+OBSOLETE_ER_QUERY_ON_MASTER = 1219
+ER_ERROR_WHEN_EXECUTING_COMMAND = 1220
+ER_WRONG_USAGE = 1221
+ER_WRONG_NUMBER_OF_COLUMNS_IN_SELECT = 1222
+ER_CANT_UPDATE_WITH_READLOCK = 1223
+ER_MIXING_NOT_ALLOWED = 1224
+ER_DUP_ARGUMENT = 1225
+ER_USER_LIMIT_REACHED = 1226
+ER_SPECIFIC_ACCESS_DENIED_ERROR = 1227
+ER_LOCAL_VARIABLE = 1228
+ER_GLOBAL_VARIABLE = 1229
+ER_NO_DEFAULT = 1230
+ER_WRONG_VALUE_FOR_VAR = 1231
+ER_WRONG_TYPE_FOR_VAR = 1232
+ER_VAR_CANT_BE_READ = 1233
+ER_CANT_USE_OPTION_HERE = 1234
+ER_NOT_SUPPORTED_YET = 1235
+ER_MASTER_FATAL_ERROR_READING_BINLOG = 1236
+ER_SLAVE_IGNORED_TABLE = 1237
+ER_INCORRECT_GLOBAL_LOCAL_VAR = 1238
+ER_WRONG_FK_DEF = 1239
+ER_KEY_REF_DO_NOT_MATCH_TABLE_REF = 1240
+ER_OPERAND_COLUMNS = 1241
+ER_SUBQUERY_NO_1_ROW = 1242
+ER_UNKNOWN_STMT_HANDLER = 1243
+ER_CORRUPT_HELP_DB = 1244
+OBSOLETE_ER_CYCLIC_REFERENCE = 1245
+ER_AUTO_CONVERT = 1246
+ER_ILLEGAL_REFERENCE = 1247
+ER_DERIVED_MUST_HAVE_ALIAS = 1248
+ER_SELECT_REDUCED = 1249
+ER_TABLENAME_NOT_ALLOWED_HERE = 1250
+ER_NOT_SUPPORTED_AUTH_MODE = 1251
+ER_SPATIAL_CANT_HAVE_NULL = 1252
+ER_COLLATION_CHARSET_MISMATCH = 1253
+OBSOLETE_ER_SLAVE_WAS_RUNNING = 1254
+OBSOLETE_ER_SLAVE_WAS_NOT_RUNNING = 1255
+ER_TOO_BIG_FOR_UNCOMPRESS = 1256
+ER_ZLIB_Z_MEM_ERROR = 1257
+ER_ZLIB_Z_BUF_ERROR = 1258
+ER_ZLIB_Z_DATA_ERROR = 1259
+ER_CUT_VALUE_GROUP_CONCAT = 1260
+ER_WARN_TOO_FEW_RECORDS = 1261
+ER_WARN_TOO_MANY_RECORDS = 1262
+ER_WARN_NULL_TO_NOTNULL = 1263
+ER_WARN_DATA_OUT_OF_RANGE = 1264
+WARN_DATA_TRUNCATED = 1265
+ER_WARN_USING_OTHER_HANDLER = 1266
+ER_CANT_AGGREGATE_2COLLATIONS = 1267
+OBSOLETE_ER_DROP_USER = 1268
+ER_REVOKE_GRANTS = 1269
+ER_CANT_AGGREGATE_3COLLATIONS = 1270
+ER_CANT_AGGREGATE_NCOLLATIONS = 1271
+ER_VARIABLE_IS_NOT_STRUCT = 1272
+ER_UNKNOWN_COLLATION = 1273
+ER_SLAVE_IGNORED_SSL_PARAMS = 1274
+ER_SERVER_IS_IN_SECURE_AUTH_MODE = 1275
+ER_WARN_FIELD_RESOLVED = 1276
+ER_BAD_SLAVE_UNTIL_COND = 1277
+ER_MISSING_SKIP_SLAVE = 1278
+ER_UNTIL_COND_IGNORED = 1279
+ER_WRONG_NAME_FOR_INDEX = 1280
+ER_WRONG_NAME_FOR_CATALOG = 1281
+OBSOLETE_ER_WARN_QC_RESIZE = 1282
+ER_BAD_FT_COLUMN = 1283
+ER_UNKNOWN_KEY_CACHE = 1284
+ER_WARN_HOSTNAME_WONT_WORK = 1285
+ER_UNKNOWN_STORAGE_ENGINE = 1286
+ER_WARN_DEPRECATED_SYNTAX = 1287
+ER_NON_UPDATABLE_TABLE = 1288
+ER_FEATURE_DISABLED = 1289
+ER_OPTION_PREVENTS_STATEMENT = 1290
+ER_DUPLICATED_VALUE_IN_TYPE = 1291
+ER_TRUNCATED_WRONG_VALUE = 1292
+OBSOLETE_ER_TOO_MUCH_AUTO_TIMESTAMP_COLS = 1293
+ER_INVALID_ON_UPDATE = 1294
+ER_UNSUPPORTED_PS = 1295
+ER_GET_ERRMSG = 1296
+ER_GET_TEMPORARY_ERRMSG = 1297
+ER_UNKNOWN_TIME_ZONE = 1298
+ER_WARN_INVALID_TIMESTAMP = 1299
+ER_INVALID_CHARACTER_STRING = 1300
+ER_WARN_ALLOWED_PACKET_OVERFLOWED = 1301
+ER_CONFLICTING_DECLARATIONS = 1302
+ER_SP_NO_RECURSIVE_CREATE = 1303
+ER_SP_ALREADY_EXISTS = 1304
+ER_SP_DOES_NOT_EXIST = 1305
+ER_SP_DROP_FAILED = 1306
+ER_SP_STORE_FAILED = 1307
+ER_SP_LILABEL_MISMATCH = 1308
+ER_SP_LABEL_REDEFINE = 1309
+ER_SP_LABEL_MISMATCH = 1310
+ER_SP_UNINIT_VAR = 1311
+ER_SP_BADSELECT = 1312
+ER_SP_BADRETURN = 1313
+ER_SP_BADSTATEMENT = 1314
+ER_UPDATE_LOG_DEPRECATED_IGNORED = 1315
+ER_UPDATE_LOG_DEPRECATED_TRANSLATED = 1316
+ER_QUERY_INTERRUPTED = 1317
+ER_SP_WRONG_NO_OF_ARGS = 1318
+ER_SP_COND_MISMATCH = 1319
+ER_SP_NORETURN = 1320
+ER_SP_NORETURNEND = 1321
+ER_SP_BAD_CURSOR_QUERY = 1322
+ER_SP_BAD_CURSOR_SELECT = 1323
+ER_SP_CURSOR_MISMATCH = 1324
+ER_SP_CURSOR_ALREADY_OPEN = 1325
+ER_SP_CURSOR_NOT_OPEN = 1326
+ER_SP_UNDECLARED_VAR = 1327
+ER_SP_WRONG_NO_OF_FETCH_ARGS = 1328
+ER_SP_FETCH_NO_DATA = 1329
+ER_SP_DUP_PARAM = 1330
+ER_SP_DUP_VAR = 1331
+ER_SP_DUP_COND = 1332
+ER_SP_DUP_CURS = 1333
+ER_SP_CANT_ALTER = 1334
+ER_SP_SUBSELECT_NYI = 1335
+ER_STMT_NOT_ALLOWED_IN_SF_OR_TRG = 1336
+ER_SP_VARCOND_AFTER_CURSHNDLR = 1337
+ER_SP_CURSOR_AFTER_HANDLER = 1338
+ER_SP_CASE_NOT_FOUND = 1339
+ER_FPARSER_TOO_BIG_FILE = 1340
+ER_FPARSER_BAD_HEADER = 1341
+ER_FPARSER_EOF_IN_COMMENT = 1342
+ER_FPARSER_ERROR_IN_PARAMETER = 1343
+ER_FPARSER_EOF_IN_UNKNOWN_PARAMETER = 1344
+ER_VIEW_NO_EXPLAIN = 1345
+OBSOLETE_ER_FRM_UNKNOWN_TYPE = 1346
+ER_WRONG_OBJECT = 1347
+ER_NONUPDATEABLE_COLUMN = 1348
+OBSOLETE_ER_VIEW_SELECT_DERIVED_UNUSED = 1349
+ER_VIEW_SELECT_CLAUSE = 1350
+ER_VIEW_SELECT_VARIABLE = 1351
+ER_VIEW_SELECT_TMPTABLE = 1352
+ER_VIEW_WRONG_LIST = 1353
+ER_WARN_VIEW_MERGE = 1354
+ER_WARN_VIEW_WITHOUT_KEY = 1355
+ER_VIEW_INVALID = 1356
+ER_SP_NO_DROP_SP = 1357
+OBSOLETE_ER_SP_GOTO_IN_HNDLR = 1358
+ER_TRG_ALREADY_EXISTS = 1359
+ER_TRG_DOES_NOT_EXIST = 1360
+ER_TRG_ON_VIEW_OR_TEMP_TABLE = 1361
+ER_TRG_CANT_CHANGE_ROW = 1362
+ER_TRG_NO_SUCH_ROW_IN_TRG = 1363
+ER_NO_DEFAULT_FOR_FIELD = 1364
+ER_DIVISION_BY_ZERO = 1365
+ER_TRUNCATED_WRONG_VALUE_FOR_FIELD = 1366
+ER_ILLEGAL_VALUE_FOR_TYPE = 1367
+ER_VIEW_NONUPD_CHECK = 1368
+ER_VIEW_CHECK_FAILED = 1369
+ER_PROCACCESS_DENIED_ERROR = 1370
+ER_RELAY_LOG_FAIL = 1371
+OBSOLETE_ER_PASSWD_LENGTH = 1372
+ER_UNKNOWN_TARGET_BINLOG = 1373
+ER_IO_ERR_LOG_INDEX_READ = 1374
+ER_BINLOG_PURGE_PROHIBITED = 1375
+ER_FSEEK_FAIL = 1376
+ER_BINLOG_PURGE_FATAL_ERR = 1377
+ER_LOG_IN_USE = 1378
+ER_LOG_PURGE_UNKNOWN_ERR = 1379
+ER_RELAY_LOG_INIT = 1380
+ER_NO_BINARY_LOGGING = 1381
+ER_RESERVED_SYNTAX = 1382
+OBSOLETE_ER_WSAS_FAILED = 1383
+OBSOLETE_ER_DIFF_GROUPS_PROC = 1384
+OBSOLETE_ER_NO_GROUP_FOR_PROC = 1385
+OBSOLETE_ER_ORDER_WITH_PROC = 1386
+OBSOLETE_ER_LOGGING_PROHIBIT_CHANGING_OF = 1387
+OBSOLETE_ER_NO_FILE_MAPPING = 1388
+OBSOLETE_ER_WRONG_MAGIC = 1389
+ER_PS_MANY_PARAM = 1390
+ER_KEY_PART_0 = 1391
+ER_VIEW_CHECKSUM = 1392
+ER_VIEW_MULTIUPDATE = 1393
+ER_VIEW_NO_INSERT_FIELD_LIST = 1394
+ER_VIEW_DELETE_MERGE_VIEW = 1395
+ER_CANNOT_USER = 1396
+ER_XAER_NOTA = 1397
+ER_XAER_INVAL = 1398
+ER_XAER_RMFAIL = 1399
+ER_XAER_OUTSIDE = 1400
+ER_XAER_RMERR = 1401
+ER_XA_RBROLLBACK = 1402
+ER_NONEXISTING_PROC_GRANT = 1403
+ER_PROC_AUTO_GRANT_FAIL = 1404
+ER_PROC_AUTO_REVOKE_FAIL = 1405
+ER_DATA_TOO_LONG = 1406
+ER_SP_BAD_SQLSTATE = 1407
+ER_STARTUP = 1408
+ER_LOAD_FROM_FIXED_SIZE_ROWS_TO_VAR = 1409
+ER_CANT_CREATE_USER_WITH_GRANT = 1410
+ER_WRONG_VALUE_FOR_TYPE = 1411
+ER_TABLE_DEF_CHANGED = 1412
+ER_SP_DUP_HANDLER = 1413
+ER_SP_NOT_VAR_ARG = 1414
+ER_SP_NO_RETSET = 1415
+ER_CANT_CREATE_GEOMETRY_OBJECT = 1416
+OBSOLETE_ER_FAILED_ROUTINE_BREAK_BINLOG = 1417
+ER_BINLOG_UNSAFE_ROUTINE = 1418
+ER_BINLOG_CREATE_ROUTINE_NEED_SUPER = 1419
+OBSOLETE_ER_EXEC_STMT_WITH_OPEN_CURSOR = 1420
+ER_STMT_HAS_NO_OPEN_CURSOR = 1421
+ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG = 1422
+ER_NO_DEFAULT_FOR_VIEW_FIELD = 1423
+ER_SP_NO_RECURSION = 1424
+ER_TOO_BIG_SCALE = 1425
+ER_TOO_BIG_PRECISION = 1426
+ER_M_BIGGER_THAN_D = 1427
+ER_WRONG_LOCK_OF_SYSTEM_TABLE = 1428
+ER_CONNECT_TO_FOREIGN_DATA_SOURCE = 1429
+ER_QUERY_ON_FOREIGN_DATA_SOURCE = 1430
+ER_FOREIGN_DATA_SOURCE_DOESNT_EXIST = 1431
+ER_FOREIGN_DATA_STRING_INVALID_CANT_CREATE = 1432
+ER_FOREIGN_DATA_STRING_INVALID = 1433
+OBSOLETE_ER_CANT_CREATE_FEDERATED_TABLE = 1434
+ER_TRG_IN_WRONG_SCHEMA = 1435
+ER_STACK_OVERRUN_NEED_MORE = 1436
+ER_TOO_LONG_BODY = 1437
+ER_WARN_CANT_DROP_DEFAULT_KEYCACHE = 1438
+ER_TOO_BIG_DISPLAYWIDTH = 1439
+ER_XAER_DUPID = 1440
+ER_DATETIME_FUNCTION_OVERFLOW = 1441
+ER_CANT_UPDATE_USED_TABLE_IN_SF_OR_TRG = 1442
+ER_VIEW_PREVENT_UPDATE = 1443
+ER_PS_NO_RECURSION = 1444
+ER_SP_CANT_SET_AUTOCOMMIT = 1445
+OBSOLETE_ER_MALFORMED_DEFINER = 1446
+ER_VIEW_FRM_NO_USER = 1447
+ER_VIEW_OTHER_USER = 1448
+ER_NO_SUCH_USER = 1449
+ER_FORBID_SCHEMA_CHANGE = 1450
+ER_ROW_IS_REFERENCED_2 = 1451
+ER_NO_REFERENCED_ROW_2 = 1452
+ER_SP_BAD_VAR_SHADOW = 1453
+ER_TRG_NO_DEFINER = 1454
+ER_OLD_FILE_FORMAT = 1455
+ER_SP_RECURSION_LIMIT = 1456
+OBSOLETE_ER_SP_PROC_TABLE_CORRUPT = 1457
+ER_SP_WRONG_NAME = 1458
+ER_TABLE_NEEDS_UPGRADE = 1459
+ER_SP_NO_AGGREGATE = 1460
+ER_MAX_PREPARED_STMT_COUNT_REACHED = 1461
+ER_VIEW_RECURSIVE = 1462
+ER_NON_GROUPING_FIELD_USED = 1463
+ER_TABLE_CANT_HANDLE_SPKEYS = 1464
+ER_NO_TRIGGERS_ON_SYSTEM_SCHEMA = 1465
+ER_REMOVED_SPACES = 1466
+ER_AUTOINC_READ_FAILED = 1467
+ER_USERNAME = 1468
+ER_HOSTNAME = 1469
+ER_WRONG_STRING_LENGTH = 1470
+ER_NON_INSERTABLE_TABLE = 1471
+ER_ADMIN_WRONG_MRG_TABLE = 1472
+ER_TOO_HIGH_LEVEL_OF_NESTING_FOR_SELECT = 1473
+ER_NAME_BECOMES_EMPTY = 1474
+ER_AMBIGUOUS_FIELD_TERM = 1475
+ER_FOREIGN_SERVER_EXISTS = 1476
+ER_FOREIGN_SERVER_DOESNT_EXIST = 1477
+ER_ILLEGAL_HA_CREATE_OPTION = 1478
+ER_PARTITION_REQUIRES_VALUES_ERROR = 1479
+ER_PARTITION_WRONG_VALUES_ERROR = 1480
+ER_PARTITION_MAXVALUE_ERROR = 1481
+OBSOLETE_ER_PARTITION_SUBPARTITION_ERROR = 1482
+OBSOLETE_ER_PARTITION_SUBPART_MIX_ERROR = 1483
+ER_PARTITION_WRONG_NO_PART_ERROR = 1484
+ER_PARTITION_WRONG_NO_SUBPART_ERROR = 1485
+ER_WRONG_EXPR_IN_PARTITION_FUNC_ERROR = 1486
+OBSOLETE_ER_NO_CONST_EXPR_IN_RANGE_OR_LIST_ERROR = 1487
+ER_FIELD_NOT_FOUND_PART_ERROR = 1488
+OBSOLETE_ER_LIST_OF_FIELDS_ONLY_IN_HASH_ERROR = 1489
+ER_INCONSISTENT_PARTITION_INFO_ERROR = 1490
+ER_PARTITION_FUNC_NOT_ALLOWED_ERROR = 1491
+ER_PARTITIONS_MUST_BE_DEFINED_ERROR = 1492
+ER_RANGE_NOT_INCREASING_ERROR = 1493
+ER_INCONSISTENT_TYPE_OF_FUNCTIONS_ERROR = 1494
+ER_MULTIPLE_DEF_CONST_IN_LIST_PART_ERROR = 1495
+ER_PARTITION_ENTRY_ERROR = 1496
+ER_MIX_HANDLER_ERROR = 1497
+ER_PARTITION_NOT_DEFINED_ERROR = 1498
+ER_TOO_MANY_PARTITIONS_ERROR = 1499
+ER_SUBPARTITION_ERROR = 1500
+ER_CANT_CREATE_HANDLER_FILE = 1501
+ER_BLOB_FIELD_IN_PART_FUNC_ERROR = 1502
+ER_UNIQUE_KEY_NEED_ALL_FIELDS_IN_PF = 1503
+ER_NO_PARTS_ERROR = 1504
+ER_PARTITION_MGMT_ON_NONPARTITIONED = 1505
+ER_FOREIGN_KEY_ON_PARTITIONED = 1506
+ER_DROP_PARTITION_NON_EXISTENT = 1507
+ER_DROP_LAST_PARTITION = 1508
+ER_COALESCE_ONLY_ON_HASH_PARTITION = 1509
+ER_REORG_HASH_ONLY_ON_SAME_NO = 1510
+ER_REORG_NO_PARAM_ERROR = 1511
+ER_ONLY_ON_RANGE_LIST_PARTITION = 1512
+ER_ADD_PARTITION_SUBPART_ERROR = 1513
+ER_ADD_PARTITION_NO_NEW_PARTITION = 1514
+ER_COALESCE_PARTITION_NO_PARTITION = 1515
+ER_REORG_PARTITION_NOT_EXIST = 1516
+ER_SAME_NAME_PARTITION = 1517
+ER_NO_BINLOG_ERROR = 1518
+ER_CONSECUTIVE_REORG_PARTITIONS = 1519
+ER_REORG_OUTSIDE_RANGE = 1520
+ER_PARTITION_FUNCTION_FAILURE = 1521
+OBSOLETE_ER_PART_STATE_ERROR = 1522
+ER_LIMITED_PART_RANGE = 1523
+ER_PLUGIN_IS_NOT_LOADED = 1524
+ER_WRONG_VALUE = 1525
+ER_NO_PARTITION_FOR_GIVEN_VALUE = 1526
+ER_FILEGROUP_OPTION_ONLY_ONCE = 1527
+ER_CREATE_FILEGROUP_FAILED = 1528
+ER_DROP_FILEGROUP_FAILED = 1529
+ER_TABLESPACE_AUTO_EXTEND_ERROR = 1530
+ER_WRONG_SIZE_NUMBER = 1531
+ER_SIZE_OVERFLOW_ERROR = 1532
+ER_ALTER_FILEGROUP_FAILED = 1533
+ER_BINLOG_ROW_LOGGING_FAILED = 1534
+OBSOLETE_ER_BINLOG_ROW_WRONG_TABLE_DEF = 1535
+OBSOLETE_ER_BINLOG_ROW_RBR_TO_SBR = 1536
+ER_EVENT_ALREADY_EXISTS = 1537
+OBSOLETE_ER_EVENT_STORE_FAILED = 1538
+ER_EVENT_DOES_NOT_EXIST = 1539
+OBSOLETE_ER_EVENT_CANT_ALTER = 1540
+OBSOLETE_ER_EVENT_DROP_FAILED = 1541
+ER_EVENT_INTERVAL_NOT_POSITIVE_OR_TOO_BIG = 1542
+ER_EVENT_ENDS_BEFORE_STARTS = 1543
+ER_EVENT_EXEC_TIME_IN_THE_PAST = 1544
+OBSOLETE_ER_EVENT_OPEN_TABLE_FAILED = 1545
+OBSOLETE_ER_EVENT_NEITHER_M_EXPR_NOR_M_AT = 1546
+OBSOLETE_ER_COL_COUNT_DOESNT_MATCH_CORRUPTED = 1547
+OBSOLETE_ER_CANNOT_LOAD_FROM_TABLE = 1548
+OBSOLETE_ER_EVENT_CANNOT_DELETE = 1549
+OBSOLETE_ER_EVENT_COMPILE_ERROR = 1550
+ER_EVENT_SAME_NAME = 1551
+OBSOLETE_ER_EVENT_DATA_TOO_LONG = 1552
+ER_DROP_INDEX_FK = 1553
+ER_WARN_DEPRECATED_SYNTAX_WITH_VER = 1554
+OBSOLETE_ER_CANT_WRITE_LOCK_LOG_TABLE = 1555
+ER_CANT_LOCK_LOG_TABLE = 1556
+ER_FOREIGN_DUPLICATE_KEY_OLD_UNUSED = 1557
+ER_COL_COUNT_DOESNT_MATCH_PLEASE_UPDATE = 1558
+ER_TEMP_TABLE_PREVENTS_SWITCH_OUT_OF_RBR = 1559
+ER_STORED_FUNCTION_PREVENTS_SWITCH_BINLOG_FORMAT = 1560
+OBSOLETE_ER_NDB_CANT_SWITCH_BINLOG_FORMAT = 1561
+ER_PARTITION_NO_TEMPORARY = 1562
+ER_PARTITION_CONST_DOMAIN_ERROR = 1563
+ER_PARTITION_FUNCTION_IS_NOT_ALLOWED = 1564
+OBSOLETE_ER_DDL_LOG_ERROR_UNUSED = 1565
+ER_NULL_IN_VALUES_LESS_THAN = 1566
+ER_WRONG_PARTITION_NAME = 1567
+ER_CANT_CHANGE_TX_CHARACTERISTICS = 1568
+ER_DUP_ENTRY_AUTOINCREMENT_CASE = 1569
+OBSOLETE_ER_EVENT_MODIFY_QUEUE_ERROR = 1570
+ER_EVENT_SET_VAR_ERROR = 1571
+ER_PARTITION_MERGE_ERROR = 1572
+OBSOLETE_ER_CANT_ACTIVATE_LOG = 1573
+OBSOLETE_ER_RBR_NOT_AVAILABLE = 1574
+ER_BASE64_DECODE_ERROR = 1575
+ER_EVENT_RECURSION_FORBIDDEN = 1576
+OBSOLETE_ER_EVENTS_DB_ERROR = 1577
+ER_ONLY_INTEGERS_ALLOWED = 1578
+ER_UNSUPORTED_LOG_ENGINE = 1579
+ER_BAD_LOG_STATEMENT = 1580
+ER_CANT_RENAME_LOG_TABLE = 1581
+ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT = 1582
+ER_WRONG_PARAMETERS_TO_NATIVE_FCT = 1583
+ER_WRONG_PARAMETERS_TO_STORED_FCT = 1584
+ER_NATIVE_FCT_NAME_COLLISION = 1585
+ER_DUP_ENTRY_WITH_KEY_NAME = 1586
+ER_BINLOG_PURGE_EMFILE = 1587
+ER_EVENT_CANNOT_CREATE_IN_THE_PAST = 1588
+ER_EVENT_CANNOT_ALTER_IN_THE_PAST = 1589
+OBSOLETE_ER_SLAVE_INCIDENT = 1590
+ER_NO_PARTITION_FOR_GIVEN_VALUE_SILENT = 1591
+ER_BINLOG_UNSAFE_STATEMENT = 1592
+ER_BINLOG_FATAL_ERROR = 1593
+OBSOLETE_ER_SLAVE_RELAY_LOG_READ_FAILURE = 1594
+OBSOLETE_ER_SLAVE_RELAY_LOG_WRITE_FAILURE = 1595
+OBSOLETE_ER_SLAVE_CREATE_EVENT_FAILURE = 1596
+OBSOLETE_ER_SLAVE_MASTER_COM_FAILURE = 1597
+ER_BINLOG_LOGGING_IMPOSSIBLE = 1598
+ER_VIEW_NO_CREATION_CTX = 1599
+ER_VIEW_INVALID_CREATION_CTX = 1600
+OBSOLETE_ER_SR_INVALID_CREATION_CTX = 1601
+ER_TRG_CORRUPTED_FILE = 1602
+ER_TRG_NO_CREATION_CTX = 1603
+ER_TRG_INVALID_CREATION_CTX = 1604
+ER_EVENT_INVALID_CREATION_CTX = 1605
+ER_TRG_CANT_OPEN_TABLE = 1606
+OBSOLETE_ER_CANT_CREATE_SROUTINE = 1607
+OBSOLETE_ER_NEVER_USED = 1608
+ER_NO_FORMAT_DESCRIPTION_EVENT_BEFORE_BINLOG_STATEMENT = 1609
+ER_SLAVE_CORRUPT_EVENT = 1610
+OBSOLETE_ER_LOAD_DATA_INVALID_COLUMN_UNUSED = 1611
+ER_LOG_PURGE_NO_FILE = 1612
+ER_XA_RBTIMEOUT = 1613
+ER_XA_RBDEADLOCK = 1614
+ER_NEED_REPREPARE = 1615
+OBSOLETE_ER_DELAYED_NOT_SUPPORTED = 1616
+WARN_NO_MASTER_INFO = 1617
+WARN_OPTION_IGNORED = 1618
+ER_PLUGIN_DELETE_BUILTIN = 1619
+WARN_PLUGIN_BUSY = 1620
+ER_VARIABLE_IS_READONLY = 1621
+ER_WARN_ENGINE_TRANSACTION_ROLLBACK = 1622
+OBSOLETE_ER_SLAVE_HEARTBEAT_FAILURE = 1623
+ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE = 1624
+ER_NDB_REPLICATION_SCHEMA_ERROR = 1625
+ER_CONFLICT_FN_PARSE_ERROR = 1626
+ER_EXCEPTIONS_WRITE_ERROR = 1627
+ER_TOO_LONG_TABLE_COMMENT = 1628
+ER_TOO_LONG_FIELD_COMMENT = 1629
+ER_FUNC_INEXISTENT_NAME_COLLISION = 1630
+ER_DATABASE_NAME = 1631
+ER_TABLE_NAME = 1632
+ER_PARTITION_NAME = 1633
+ER_SUBPARTITION_NAME = 1634
+ER_TEMPORARY_NAME = 1635
+ER_RENAMED_NAME = 1636
+ER_TOO_MANY_CONCURRENT_TRXS = 1637
+WARN_NON_ASCII_SEPARATOR_NOT_IMPLEMENTED = 1638
+ER_DEBUG_SYNC_TIMEOUT = 1639
+ER_DEBUG_SYNC_HIT_LIMIT = 1640
+ER_DUP_SIGNAL_SET = 1641
+ER_SIGNAL_WARN = 1642
+ER_SIGNAL_NOT_FOUND = 1643
+ER_SIGNAL_EXCEPTION = 1644
+ER_RESIGNAL_WITHOUT_ACTIVE_HANDLER = 1645
+ER_SIGNAL_BAD_CONDITION_TYPE = 1646
+WARN_COND_ITEM_TRUNCATED = 1647
+ER_COND_ITEM_TOO_LONG = 1648
+ER_UNKNOWN_LOCALE = 1649
+ER_SLAVE_IGNORE_SERVER_IDS = 1650
+OBSOLETE_ER_QUERY_CACHE_DISABLED = 1651
+ER_SAME_NAME_PARTITION_FIELD = 1652
+ER_PARTITION_COLUMN_LIST_ERROR = 1653
+ER_WRONG_TYPE_COLUMN_VALUE_ERROR = 1654
+ER_TOO_MANY_PARTITION_FUNC_FIELDS_ERROR = 1655
+ER_MAXVALUE_IN_VALUES_IN = 1656
+ER_TOO_MANY_VALUES_ERROR = 1657
+ER_ROW_SINGLE_PARTITION_FIELD_ERROR = 1658
+ER_FIELD_TYPE_NOT_ALLOWED_AS_PARTITION_FIELD = 1659
+ER_PARTITION_FIELDS_TOO_LONG = 1660
+ER_BINLOG_ROW_ENGINE_AND_STMT_ENGINE = 1661
+ER_BINLOG_ROW_MODE_AND_STMT_ENGINE = 1662
+ER_BINLOG_UNSAFE_AND_STMT_ENGINE = 1663
+ER_BINLOG_ROW_INJECTION_AND_STMT_ENGINE = 1664
+ER_BINLOG_STMT_MODE_AND_ROW_ENGINE = 1665
+ER_BINLOG_ROW_INJECTION_AND_STMT_MODE = 1666
+ER_BINLOG_MULTIPLE_ENGINES_AND_SELF_LOGGING_ENGINE = 1667
+ER_BINLOG_UNSAFE_LIMIT = 1668
+OBSOLETE_ER_UNUSED4 = 1669
+ER_BINLOG_UNSAFE_SYSTEM_TABLE = 1670
+ER_BINLOG_UNSAFE_AUTOINC_COLUMNS = 1671
+ER_BINLOG_UNSAFE_UDF = 1672
+ER_BINLOG_UNSAFE_SYSTEM_VARIABLE = 1673
+ER_BINLOG_UNSAFE_SYSTEM_FUNCTION = 1674
+ER_BINLOG_UNSAFE_NONTRANS_AFTER_TRANS = 1675
+ER_MESSAGE_AND_STATEMENT = 1676
+OBSOLETE_ER_SLAVE_CONVERSION_FAILED = 1677
+ER_SLAVE_CANT_CREATE_CONVERSION = 1678
+ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_BINLOG_FORMAT = 1679
+ER_PATH_LENGTH = 1680
+ER_WARN_DEPRECATED_SYNTAX_NO_REPLACEMENT = 1681
+ER_WRONG_NATIVE_TABLE_STRUCTURE = 1682
+ER_WRONG_PERFSCHEMA_USAGE = 1683
+ER_WARN_I_S_SKIPPED_TABLE = 1684
+ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_BINLOG_DIRECT = 1685
+ER_STORED_FUNCTION_PREVENTS_SWITCH_BINLOG_DIRECT = 1686
+ER_SPATIAL_MUST_HAVE_GEOM_COL = 1687
+ER_TOO_LONG_INDEX_COMMENT = 1688
+ER_LOCK_ABORTED = 1689
+ER_DATA_OUT_OF_RANGE = 1690
+ER_WRONG_SPVAR_TYPE_IN_LIMIT = 1691
+ER_BINLOG_UNSAFE_MULTIPLE_ENGINES_AND_SELF_LOGGING_ENGINE = 1692
+ER_BINLOG_UNSAFE_MIXED_STATEMENT = 1693
+ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_SQL_LOG_BIN = 1694
+ER_STORED_FUNCTION_PREVENTS_SWITCH_SQL_LOG_BIN = 1695
+ER_FAILED_READ_FROM_PAR_FILE = 1696
+ER_VALUES_IS_NOT_INT_TYPE_ERROR = 1697
+ER_ACCESS_DENIED_NO_PASSWORD_ERROR = 1698
+ER_SET_PASSWORD_AUTH_PLUGIN = 1699
+OBSOLETE_ER_GRANT_PLUGIN_USER_EXISTS = 1700
+ER_TRUNCATE_ILLEGAL_FK = 1701
+ER_PLUGIN_IS_PERMANENT = 1702
+ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE_MIN = 1703
+ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE_MAX = 1704
+ER_STMT_CACHE_FULL = 1705
+ER_MULTI_UPDATE_KEY_CONFLICT = 1706
+ER_TABLE_NEEDS_REBUILD = 1707
+WARN_OPTION_BELOW_LIMIT = 1708
+ER_INDEX_COLUMN_TOO_LONG = 1709
+ER_ERROR_IN_TRIGGER_BODY = 1710
+ER_ERROR_IN_UNKNOWN_TRIGGER_BODY = 1711
+ER_INDEX_CORRUPT = 1712
+ER_UNDO_RECORD_TOO_BIG = 1713
+ER_BINLOG_UNSAFE_INSERT_IGNORE_SELECT = 1714
+ER_BINLOG_UNSAFE_INSERT_SELECT_UPDATE = 1715
+ER_BINLOG_UNSAFE_REPLACE_SELECT = 1716
+ER_BINLOG_UNSAFE_CREATE_IGNORE_SELECT = 1717
+ER_BINLOG_UNSAFE_CREATE_REPLACE_SELECT = 1718
+ER_BINLOG_UNSAFE_UPDATE_IGNORE = 1719
+ER_PLUGIN_NO_UNINSTALL = 1720
+ER_PLUGIN_NO_INSTALL = 1721
+ER_BINLOG_UNSAFE_WRITE_AUTOINC_SELECT = 1722
+ER_BINLOG_UNSAFE_CREATE_SELECT_AUTOINC = 1723
+ER_BINLOG_UNSAFE_INSERT_TWO_KEYS = 1724
+ER_TABLE_IN_FK_CHECK = 1725
+ER_UNSUPPORTED_ENGINE = 1726
+ER_BINLOG_UNSAFE_AUTOINC_NOT_FIRST = 1727
+ER_CANNOT_LOAD_FROM_TABLE_V2 = 1728
+ER_MASTER_DELAY_VALUE_OUT_OF_RANGE = 1729
+ER_ONLY_FD_AND_RBR_EVENTS_ALLOWED_IN_BINLOG_STATEMENT = 1730
+ER_PARTITION_EXCHANGE_DIFFERENT_OPTION = 1731
+ER_PARTITION_EXCHANGE_PART_TABLE = 1732
+ER_PARTITION_EXCHANGE_TEMP_TABLE = 1733
+ER_PARTITION_INSTEAD_OF_SUBPARTITION = 1734
+ER_UNKNOWN_PARTITION = 1735
+ER_TABLES_DIFFERENT_METADATA = 1736
+ER_ROW_DOES_NOT_MATCH_PARTITION = 1737
+ER_BINLOG_CACHE_SIZE_GREATER_THAN_MAX = 1738
+ER_WARN_INDEX_NOT_APPLICABLE = 1739
+ER_PARTITION_EXCHANGE_FOREIGN_KEY = 1740
+OBSOLETE_ER_NO_SUCH_KEY_VALUE = 1741
+ER_RPL_INFO_DATA_TOO_LONG = 1742
+OBSOLETE_ER_NETWORK_READ_EVENT_CHECKSUM_FAILURE = 1743
+OBSOLETE_ER_BINLOG_READ_EVENT_CHECKSUM_FAILURE = 1744
+ER_BINLOG_STMT_CACHE_SIZE_GREATER_THAN_MAX = 1745
+ER_CANT_UPDATE_TABLE_IN_CREATE_TABLE_SELECT = 1746
+ER_PARTITION_CLAUSE_ON_NONPARTITIONED = 1747
+ER_ROW_DOES_NOT_MATCH_GIVEN_PARTITION_SET = 1748
+OBSOLETE_ER_NO_SUCH_PARTITION__UNUSED = 1749
+ER_CHANGE_RPL_INFO_REPOSITORY_FAILURE = 1750
+ER_WARNING_NOT_COMPLETE_ROLLBACK_WITH_CREATED_TEMP_TABLE = 1751
+ER_WARNING_NOT_COMPLETE_ROLLBACK_WITH_DROPPED_TEMP_TABLE = 1752
+ER_MTS_FEATURE_IS_NOT_SUPPORTED = 1753
+ER_MTS_UPDATED_DBS_GREATER_MAX = 1754
+ER_MTS_CANT_PARALLEL = 1755
+ER_MTS_INCONSISTENT_DATA = 1756
+ER_FULLTEXT_NOT_SUPPORTED_WITH_PARTITIONING = 1757
+ER_DA_INVALID_CONDITION_NUMBER = 1758
+ER_INSECURE_PLAIN_TEXT = 1759
+ER_INSECURE_CHANGE_MASTER = 1760
+ER_FOREIGN_DUPLICATE_KEY_WITH_CHILD_INFO = 1761
+ER_FOREIGN_DUPLICATE_KEY_WITHOUT_CHILD_INFO = 1762
+ER_SQLTHREAD_WITH_SECURE_SLAVE = 1763
+ER_TABLE_HAS_NO_FT = 1764
+ER_VARIABLE_NOT_SETTABLE_IN_SF_OR_TRIGGER = 1765
+ER_VARIABLE_NOT_SETTABLE_IN_TRANSACTION = 1766
+OBSOLETE_ER_GTID_NEXT_IS_NOT_IN_GTID_NEXT_LIST = 1767
+OBSOLETE_ER_CANT_CHANGE_GTID_NEXT_IN_TRANSACTION = 1768
+ER_SET_STATEMENT_CANNOT_INVOKE_FUNCTION = 1769
+ER_GTID_NEXT_CANT_BE_AUTOMATIC_IF_GTID_NEXT_LIST_IS_NON_NULL = 1770
+OBSOLETE_ER_SKIPPING_LOGGED_TRANSACTION = 1771
+ER_MALFORMED_GTID_SET_SPECIFICATION = 1772
+ER_MALFORMED_GTID_SET_ENCODING = 1773
+ER_MALFORMED_GTID_SPECIFICATION = 1774
+ER_GNO_EXHAUSTED = 1775
+ER_BAD_SLAVE_AUTO_POSITION = 1776
+ER_AUTO_POSITION_REQUIRES_GTID_MODE_NOT_OFF = 1777
+ER_CANT_DO_IMPLICIT_COMMIT_IN_TRX_WHEN_GTID_NEXT_IS_SET = 1778
+ER_GTID_MODE_ON_REQUIRES_ENFORCE_GTID_CONSISTENCY_ON = 1779
+OBSOLETE_ER_GTID_MODE_REQUIRES_BINLOG = 1780
+ER_CANT_SET_GTID_NEXT_TO_GTID_WHEN_GTID_MODE_IS_OFF = 1781
+ER_CANT_SET_GTID_NEXT_TO_ANONYMOUS_WHEN_GTID_MODE_IS_ON = 1782
+ER_CANT_SET_GTID_NEXT_LIST_TO_NON_NULL_WHEN_GTID_MODE_IS_OFF = 1783
+OBSOLETE_ER_FOUND_GTID_EVENT_WHEN_GTID_MODE_IS_OFF__UNUSED = 1784
+ER_GTID_UNSAFE_NON_TRANSACTIONAL_TABLE = 1785
+ER_GTID_UNSAFE_CREATE_SELECT = 1786
+ER_GTID_UNSAFE_CREATE_DROP_TEMPORARY_TABLE_IN_TRANSACTION = 1787
+ER_GTID_MODE_CAN_ONLY_CHANGE_ONE_STEP_AT_A_TIME = 1788
+ER_MASTER_HAS_PURGED_REQUIRED_GTIDS = 1789
+ER_CANT_SET_GTID_NEXT_WHEN_OWNING_GTID = 1790
+ER_UNKNOWN_EXPLAIN_FORMAT = 1791
+ER_CANT_EXECUTE_IN_READ_ONLY_TRANSACTION = 1792
+ER_TOO_LONG_TABLE_PARTITION_COMMENT = 1793
+ER_SLAVE_CONFIGURATION = 1794
+ER_INNODB_FT_LIMIT = 1795
+ER_INNODB_NO_FT_TEMP_TABLE = 1796
+ER_INNODB_FT_WRONG_DOCID_COLUMN = 1797
+ER_INNODB_FT_WRONG_DOCID_INDEX = 1798
+ER_INNODB_ONLINE_LOG_TOO_BIG = 1799
+ER_UNKNOWN_ALTER_ALGORITHM = 1800
+ER_UNKNOWN_ALTER_LOCK = 1801
+ER_MTS_CHANGE_MASTER_CANT_RUN_WITH_GAPS = 1802
+ER_MTS_RECOVERY_FAILURE = 1803
+ER_MTS_RESET_WORKERS = 1804
+ER_COL_COUNT_DOESNT_MATCH_CORRUPTED_V2 = 1805
+ER_SLAVE_SILENT_RETRY_TRANSACTION = 1806
+ER_DISCARD_FK_CHECKS_RUNNING = 1807
+ER_TABLE_SCHEMA_MISMATCH = 1808
+ER_TABLE_IN_SYSTEM_TABLESPACE = 1809
+ER_IO_READ_ERROR = 1810
+ER_IO_WRITE_ERROR = 1811
+ER_TABLESPACE_MISSING = 1812
+ER_TABLESPACE_EXISTS = 1813
+ER_TABLESPACE_DISCARDED = 1814
+ER_INTERNAL_ERROR = 1815
+ER_INNODB_IMPORT_ERROR = 1816
+ER_INNODB_INDEX_CORRUPT = 1817
+ER_INVALID_YEAR_COLUMN_LENGTH = 1818
+ER_NOT_VALID_PASSWORD = 1819
+ER_MUST_CHANGE_PASSWORD = 1820
+ER_FK_NO_INDEX_CHILD = 1821
+ER_FK_NO_INDEX_PARENT = 1822
+ER_FK_FAIL_ADD_SYSTEM = 1823
+ER_FK_CANNOT_OPEN_PARENT = 1824
+ER_FK_INCORRECT_OPTION = 1825
+ER_FK_DUP_NAME = 1826
+ER_PASSWORD_FORMAT = 1827
+ER_FK_COLUMN_CANNOT_DROP = 1828
+ER_FK_COLUMN_CANNOT_DROP_CHILD = 1829
+ER_FK_COLUMN_NOT_NULL = 1830
+ER_DUP_INDEX = 1831
+ER_FK_COLUMN_CANNOT_CHANGE = 1832
+ER_FK_COLUMN_CANNOT_CHANGE_CHILD = 1833
+OBSOLETE_ER_UNUSED5 = 1834
+ER_MALFORMED_PACKET = 1835
+ER_READ_ONLY_MODE = 1836
+ER_GTID_NEXT_TYPE_UNDEFINED_GTID = 1837
+ER_VARIABLE_NOT_SETTABLE_IN_SP = 1838
+OBSOLETE_ER_CANT_SET_GTID_PURGED_WHEN_GTID_MODE_IS_OFF = 1839
+ER_CANT_SET_GTID_PURGED_WHEN_GTID_EXECUTED_IS_NOT_EMPTY = 1840
+ER_CANT_SET_GTID_PURGED_WHEN_OWNED_GTIDS_IS_NOT_EMPTY = 1841
+ER_GTID_PURGED_WAS_CHANGED = 1842
+ER_GTID_EXECUTED_WAS_CHANGED = 1843
+ER_BINLOG_STMT_MODE_AND_NO_REPL_TABLES = 1844
+ER_ALTER_OPERATION_NOT_SUPPORTED = 1845
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON = 1846
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_COPY = 1847
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_PARTITION = 1848
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_FK_RENAME = 1849
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_COLUMN_TYPE = 1850
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_FK_CHECK = 1851
+OBSOLETE_ER_UNUSED6 = 1852
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_NOPK = 1853
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_AUTOINC = 1854
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_HIDDEN_FTS = 1855
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_CHANGE_FTS = 1856
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_FTS = 1857
+ER_SQL_SLAVE_SKIP_COUNTER_NOT_SETTABLE_IN_GTID_MODE = 1858
+ER_DUP_UNKNOWN_IN_INDEX = 1859
+ER_IDENT_CAUSES_TOO_LONG_PATH = 1860
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_NOT_NULL = 1861
+ER_MUST_CHANGE_PASSWORD_LOGIN = 1862
+ER_ROW_IN_WRONG_PARTITION = 1863
+ER_MTS_EVENT_BIGGER_PENDING_JOBS_SIZE_MAX = 1864
+OBSOLETE_ER_INNODB_NO_FT_USES_PARSER = 1865
+ER_BINLOG_LOGICAL_CORRUPTION = 1866
+ER_WARN_PURGE_LOG_IN_USE = 1867
+ER_WARN_PURGE_LOG_IS_ACTIVE = 1868
+ER_AUTO_INCREMENT_CONFLICT = 1869
+WARN_ON_BLOCKHOLE_IN_RBR = 1870
+ER_SLAVE_MI_INIT_REPOSITORY = 1871
+ER_SLAVE_RLI_INIT_REPOSITORY = 1872
+ER_ACCESS_DENIED_CHANGE_USER_ERROR = 1873
+ER_INNODB_READ_ONLY = 1874
+ER_STOP_SLAVE_SQL_THREAD_TIMEOUT = 1875
+ER_STOP_SLAVE_IO_THREAD_TIMEOUT = 1876
+ER_TABLE_CORRUPT = 1877
+ER_TEMP_FILE_WRITE_FAILURE = 1878
+ER_INNODB_FT_AUX_NOT_HEX_ID = 1879
+ER_OLD_TEMPORALS_UPGRADED = 1880
+ER_INNODB_FORCED_RECOVERY = 1881
+ER_AES_INVALID_IV = 1882
+ER_PLUGIN_CANNOT_BE_UNINSTALLED = 1883
+ER_GTID_UNSAFE_BINLOG_SPLITTABLE_STATEMENT_AND_ASSIGNED_GTID = 1884
+ER_SLAVE_HAS_MORE_GTIDS_THAN_MASTER = 1885
+ER_MISSING_KEY = 1886
+ER_FILE_CORRUPT = 3000
+ER_ERROR_ON_MASTER = 3001
+OBSOLETE_ER_INCONSISTENT_ERROR = 3002
+ER_STORAGE_ENGINE_NOT_LOADED = 3003
+ER_GET_STACKED_DA_WITHOUT_ACTIVE_HANDLER = 3004
+ER_WARN_LEGACY_SYNTAX_CONVERTED = 3005
+ER_BINLOG_UNSAFE_FULLTEXT_PLUGIN = 3006
+ER_CANNOT_DISCARD_TEMPORARY_TABLE = 3007
+ER_FK_DEPTH_EXCEEDED = 3008
+ER_COL_COUNT_DOESNT_MATCH_PLEASE_UPDATE_V2 = 3009
+ER_WARN_TRIGGER_DOESNT_HAVE_CREATED = 3010
+ER_REFERENCED_TRG_DOES_NOT_EXIST = 3011
+ER_EXPLAIN_NOT_SUPPORTED = 3012
+ER_INVALID_FIELD_SIZE = 3013
+ER_MISSING_HA_CREATE_OPTION = 3014
+ER_ENGINE_OUT_OF_MEMORY = 3015
+ER_PASSWORD_EXPIRE_ANONYMOUS_USER = 3016
+ER_SLAVE_SQL_THREAD_MUST_STOP = 3017
+ER_NO_FT_MATERIALIZED_SUBQUERY = 3018
+ER_INNODB_UNDO_LOG_FULL = 3019
+ER_INVALID_ARGUMENT_FOR_LOGARITHM = 3020
+ER_SLAVE_CHANNEL_IO_THREAD_MUST_STOP = 3021
+ER_WARN_OPEN_TEMP_TABLES_MUST_BE_ZERO = 3022
+ER_WARN_ONLY_MASTER_LOG_FILE_NO_POS = 3023
+ER_QUERY_TIMEOUT = 3024
+ER_NON_RO_SELECT_DISABLE_TIMER = 3025
+ER_DUP_LIST_ENTRY = 3026
+OBSOLETE_ER_SQL_MODE_NO_EFFECT = 3027
+ER_AGGREGATE_ORDER_FOR_UNION = 3028
+ER_AGGREGATE_ORDER_NON_AGG_QUERY = 3029
+ER_SLAVE_WORKER_STOPPED_PREVIOUS_THD_ERROR = 3030
+ER_DONT_SUPPORT_SLAVE_PRESERVE_COMMIT_ORDER = 3031
+ER_SERVER_OFFLINE_MODE = 3032
+ER_GIS_DIFFERENT_SRIDS = 3033
+ER_GIS_UNSUPPORTED_ARGUMENT = 3034
+ER_GIS_UNKNOWN_ERROR = 3035
+ER_GIS_UNKNOWN_EXCEPTION = 3036
+ER_GIS_INVALID_DATA = 3037
+ER_BOOST_GEOMETRY_EMPTY_INPUT_EXCEPTION = 3038
+ER_BOOST_GEOMETRY_CENTROID_EXCEPTION = 3039
+ER_BOOST_GEOMETRY_OVERLAY_INVALID_INPUT_EXCEPTION = 3040
+ER_BOOST_GEOMETRY_TURN_INFO_EXCEPTION = 3041
+ER_BOOST_GEOMETRY_SELF_INTERSECTION_POINT_EXCEPTION = 3042
+ER_BOOST_GEOMETRY_UNKNOWN_EXCEPTION = 3043
+ER_STD_BAD_ALLOC_ERROR = 3044
+ER_STD_DOMAIN_ERROR = 3045
+ER_STD_LENGTH_ERROR = 3046
+ER_STD_INVALID_ARGUMENT = 3047
+ER_STD_OUT_OF_RANGE_ERROR = 3048
+ER_STD_OVERFLOW_ERROR = 3049
+ER_STD_RANGE_ERROR = 3050
+ER_STD_UNDERFLOW_ERROR = 3051
+ER_STD_LOGIC_ERROR = 3052
+ER_STD_RUNTIME_ERROR = 3053
+ER_STD_UNKNOWN_EXCEPTION = 3054
+ER_GIS_DATA_WRONG_ENDIANESS = 3055
+ER_CHANGE_MASTER_PASSWORD_LENGTH = 3056
+ER_USER_LOCK_WRONG_NAME = 3057
+ER_USER_LOCK_DEADLOCK = 3058
+ER_REPLACE_INACCESSIBLE_ROWS = 3059
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_GIS = 3060
+ER_ILLEGAL_USER_VAR = 3061
+ER_GTID_MODE_OFF = 3062
+OBSOLETE_ER_UNSUPPORTED_BY_REPLICATION_THREAD = 3063
+ER_INCORRECT_TYPE = 3064
+ER_FIELD_IN_ORDER_NOT_SELECT = 3065
+ER_AGGREGATE_IN_ORDER_NOT_SELECT = 3066
+ER_INVALID_RPL_WILD_TABLE_FILTER_PATTERN = 3067
+ER_NET_OK_PACKET_TOO_LARGE = 3068
+ER_INVALID_JSON_DATA = 3069
+ER_INVALID_GEOJSON_MISSING_MEMBER = 3070
+ER_INVALID_GEOJSON_WRONG_TYPE = 3071
+ER_INVALID_GEOJSON_UNSPECIFIED = 3072
+ER_DIMENSION_UNSUPPORTED = 3073
+ER_SLAVE_CHANNEL_DOES_NOT_EXIST = 3074
+OBSOLETE_ER_SLAVE_MULTIPLE_CHANNELS_HOST_PORT = 3075
+ER_SLAVE_CHANNEL_NAME_INVALID_OR_TOO_LONG = 3076
+ER_SLAVE_NEW_CHANNEL_WRONG_REPOSITORY = 3077
+OBSOLETE_ER_SLAVE_CHANNEL_DELETE = 3078
+ER_SLAVE_MULTIPLE_CHANNELS_CMD = 3079
+ER_SLAVE_MAX_CHANNELS_EXCEEDED = 3080
+ER_SLAVE_CHANNEL_MUST_STOP = 3081
+ER_SLAVE_CHANNEL_NOT_RUNNING = 3082
+ER_SLAVE_CHANNEL_WAS_RUNNING = 3083
+ER_SLAVE_CHANNEL_WAS_NOT_RUNNING = 3084
+ER_SLAVE_CHANNEL_SQL_THREAD_MUST_STOP = 3085
+ER_SLAVE_CHANNEL_SQL_SKIP_COUNTER = 3086
+ER_WRONG_FIELD_WITH_GROUP_V2 = 3087
+ER_MIX_OF_GROUP_FUNC_AND_FIELDS_V2 = 3088
+ER_WARN_DEPRECATED_SYSVAR_UPDATE = 3089
+ER_WARN_DEPRECATED_SQLMODE = 3090
+ER_CANNOT_LOG_PARTIAL_DROP_DATABASE_WITH_GTID = 3091
+ER_GROUP_REPLICATION_CONFIGURATION = 3092
+ER_GROUP_REPLICATION_RUNNING = 3093
+ER_GROUP_REPLICATION_APPLIER_INIT_ERROR = 3094
+ER_GROUP_REPLICATION_STOP_APPLIER_THREAD_TIMEOUT = 3095
+ER_GROUP_REPLICATION_COMMUNICATION_LAYER_SESSION_ERROR = 3096
+ER_GROUP_REPLICATION_COMMUNICATION_LAYER_JOIN_ERROR = 3097
+ER_BEFORE_DML_VALIDATION_ERROR = 3098
+ER_PREVENTS_VARIABLE_WITHOUT_RBR = 3099
+ER_RUN_HOOK_ERROR = 3100
+ER_TRANSACTION_ROLLBACK_DURING_COMMIT = 3101
+ER_GENERATED_COLUMN_FUNCTION_IS_NOT_ALLOWED = 3102
+ER_UNSUPPORTED_ALTER_INPLACE_ON_VIRTUAL_COLUMN = 3103
+ER_WRONG_FK_OPTION_FOR_GENERATED_COLUMN = 3104
+ER_NON_DEFAULT_VALUE_FOR_GENERATED_COLUMN = 3105
+ER_UNSUPPORTED_ACTION_ON_GENERATED_COLUMN = 3106
+ER_GENERATED_COLUMN_NON_PRIOR = 3107
+ER_DEPENDENT_BY_GENERATED_COLUMN = 3108
+ER_GENERATED_COLUMN_REF_AUTO_INC = 3109
+ER_FEATURE_NOT_AVAILABLE = 3110
+ER_CANT_SET_GTID_MODE = 3111
+ER_CANT_USE_AUTO_POSITION_WITH_GTID_MODE_OFF = 3112
+OBSOLETE_ER_CANT_REPLICATE_ANONYMOUS_WITH_AUTO_POSITION = 3113
+OBSOLETE_ER_CANT_REPLICATE_ANONYMOUS_WITH_GTID_MODE_ON = 3114
+OBSOLETE_ER_CANT_REPLICATE_GTID_WITH_GTID_MODE_OFF = 3115
+ER_CANT_ENFORCE_GTID_CONSISTENCY_WITH_ONGOING_GTID_VIOLATING_TX = 3116
+ER_ENFORCE_GTID_CONSISTENCY_WARN_WITH_ONGOING_GTID_VIOLATING_TX = 3117
+ER_ACCOUNT_HAS_BEEN_LOCKED = 3118
+ER_WRONG_TABLESPACE_NAME = 3119
+ER_TABLESPACE_IS_NOT_EMPTY = 3120
+ER_WRONG_FILE_NAME = 3121
+ER_BOOST_GEOMETRY_INCONSISTENT_TURNS_EXCEPTION = 3122
+ER_WARN_OPTIMIZER_HINT_SYNTAX_ERROR = 3123
+ER_WARN_BAD_MAX_EXECUTION_TIME = 3124
+ER_WARN_UNSUPPORTED_MAX_EXECUTION_TIME = 3125
+ER_WARN_CONFLICTING_HINT = 3126
+ER_WARN_UNKNOWN_QB_NAME = 3127
+ER_UNRESOLVED_HINT_NAME = 3128
+ER_WARN_ON_MODIFYING_GTID_EXECUTED_TABLE = 3129
+ER_PLUGGABLE_PROTOCOL_COMMAND_NOT_SUPPORTED = 3130
+ER_LOCKING_SERVICE_WRONG_NAME = 3131
+ER_LOCKING_SERVICE_DEADLOCK = 3132
+ER_LOCKING_SERVICE_TIMEOUT = 3133
+ER_GIS_MAX_POINTS_IN_GEOMETRY_OVERFLOWED = 3134
+ER_SQL_MODE_MERGED = 3135
+ER_VTOKEN_PLUGIN_TOKEN_MISMATCH = 3136
+ER_VTOKEN_PLUGIN_TOKEN_NOT_FOUND = 3137
+ER_CANT_SET_VARIABLE_WHEN_OWNING_GTID = 3138
+ER_SLAVE_CHANNEL_OPERATION_NOT_ALLOWED = 3139
+ER_INVALID_JSON_TEXT = 3140
+ER_INVALID_JSON_TEXT_IN_PARAM = 3141
+ER_INVALID_JSON_BINARY_DATA = 3142
+ER_INVALID_JSON_PATH = 3143
+ER_INVALID_JSON_CHARSET = 3144
+ER_INVALID_JSON_CHARSET_IN_FUNCTION = 3145
+ER_INVALID_TYPE_FOR_JSON = 3146
+ER_INVALID_CAST_TO_JSON = 3147
+ER_INVALID_JSON_PATH_CHARSET = 3148
+ER_INVALID_JSON_PATH_WILDCARD = 3149
+ER_JSON_VALUE_TOO_BIG = 3150
+ER_JSON_KEY_TOO_BIG = 3151
+ER_JSON_USED_AS_KEY = 3152
+ER_JSON_VACUOUS_PATH = 3153
+ER_JSON_BAD_ONE_OR_ALL_ARG = 3154
+ER_NUMERIC_JSON_VALUE_OUT_OF_RANGE = 3155
+ER_INVALID_JSON_VALUE_FOR_CAST = 3156
+ER_JSON_DOCUMENT_TOO_DEEP = 3157
+ER_JSON_DOCUMENT_NULL_KEY = 3158
+ER_SECURE_TRANSPORT_REQUIRED = 3159
+ER_NO_SECURE_TRANSPORTS_CONFIGURED = 3160
+ER_DISABLED_STORAGE_ENGINE = 3161
+ER_USER_DOES_NOT_EXIST = 3162
+ER_USER_ALREADY_EXISTS = 3163
+ER_AUDIT_API_ABORT = 3164
+ER_INVALID_JSON_PATH_ARRAY_CELL = 3165
+ER_BUFPOOL_RESIZE_INPROGRESS = 3166
+ER_FEATURE_DISABLED_SEE_DOC = 3167
+ER_SERVER_ISNT_AVAILABLE = 3168
+ER_SESSION_WAS_KILLED = 3169
+ER_CAPACITY_EXCEEDED = 3170
+ER_CAPACITY_EXCEEDED_IN_RANGE_OPTIMIZER = 3171
+OBSOLETE_ER_TABLE_NEEDS_UPG_PART = 3172
+ER_CANT_WAIT_FOR_EXECUTED_GTID_SET_WHILE_OWNING_A_GTID = 3173
+ER_CANNOT_ADD_FOREIGN_BASE_COL_VIRTUAL = 3174
+ER_CANNOT_CREATE_VIRTUAL_INDEX_CONSTRAINT = 3175
+ER_ERROR_ON_MODIFYING_GTID_EXECUTED_TABLE = 3176
+ER_LOCK_REFUSED_BY_ENGINE = 3177
+ER_UNSUPPORTED_ALTER_ONLINE_ON_VIRTUAL_COLUMN = 3178
+ER_MASTER_KEY_ROTATION_NOT_SUPPORTED_BY_SE = 3179
+OBSOLETE_ER_MASTER_KEY_ROTATION_ERROR_BY_SE = 3180
+ER_MASTER_KEY_ROTATION_BINLOG_FAILED = 3181
+ER_MASTER_KEY_ROTATION_SE_UNAVAILABLE = 3182
+ER_TABLESPACE_CANNOT_ENCRYPT = 3183
+ER_INVALID_ENCRYPTION_OPTION = 3184
+ER_CANNOT_FIND_KEY_IN_KEYRING = 3185
+ER_CAPACITY_EXCEEDED_IN_PARSER = 3186
+ER_UNSUPPORTED_ALTER_ENCRYPTION_INPLACE = 3187
+ER_KEYRING_UDF_KEYRING_SERVICE_ERROR = 3188
+ER_USER_COLUMN_OLD_LENGTH = 3189
+ER_CANT_RESET_MASTER = 3190
+ER_GROUP_REPLICATION_MAX_GROUP_SIZE = 3191
+ER_CANNOT_ADD_FOREIGN_BASE_COL_STORED = 3192
+ER_TABLE_REFERENCED = 3193
+OBSOLETE_ER_PARTITION_ENGINE_DEPRECATED_FOR_TABLE = 3194
+OBSOLETE_ER_WARN_USING_GEOMFROMWKB_TO_SET_SRID_ZERO = 3195
+OBSOLETE_ER_WARN_USING_GEOMFROMWKB_TO_SET_SRID = 3196
+ER_XA_RETRY = 3197
+ER_KEYRING_AWS_UDF_AWS_KMS_ERROR = 3198
+ER_BINLOG_UNSAFE_XA = 3199
+ER_UDF_ERROR = 3200
+ER_KEYRING_MIGRATION_FAILURE = 3201
+ER_KEYRING_ACCESS_DENIED_ERROR = 3202
+ER_KEYRING_MIGRATION_STATUS = 3203
+OBSOLETE_ER_PLUGIN_FAILED_TO_OPEN_TABLES = 3204
+OBSOLETE_ER_PLUGIN_FAILED_TO_OPEN_TABLE = 3205
+OBSOLETE_ER_AUDIT_LOG_NO_KEYRING_PLUGIN_INSTALLED = 3206
+OBSOLETE_ER_AUDIT_LOG_ENCRYPTION_PASSWORD_HAS_NOT_BEEN_SET = 3207
+OBSOLETE_ER_AUDIT_LOG_COULD_NOT_CREATE_AES_KEY = 3208
+OBSOLETE_ER_AUDIT_LOG_ENCRYPTION_PASSWORD_CANNOT_BE_FETCHED = 3209
+OBSOLETE_ER_AUDIT_LOG_JSON_FILTERING_NOT_ENABLED = 3210
+OBSOLETE_ER_AUDIT_LOG_UDF_INSUFFICIENT_PRIVILEGE = 3211
+ER_AUDIT_LOG_SUPER_PRIVILEGE_REQUIRED = 3212
+OBSOLETE_ER_COULD_NOT_REINITIALIZE_AUDIT_LOG_FILTERS = 3213
+ER_AUDIT_LOG_UDF_INVALID_ARGUMENT_TYPE = 3214
+ER_AUDIT_LOG_UDF_INVALID_ARGUMENT_COUNT = 3215
+ER_AUDIT_LOG_HAS_NOT_BEEN_INSTALLED = 3216
+ER_AUDIT_LOG_UDF_READ_INVALID_MAX_ARRAY_LENGTH_ARG_TYPE = 3217
+ER_AUDIT_LOG_UDF_READ_INVALID_MAX_ARRAY_LENGTH_ARG_VALUE = 3218
+OBSOLETE_ER_AUDIT_LOG_JSON_FILTER_PARSING_ERROR = 3219
+OBSOLETE_ER_AUDIT_LOG_JSON_FILTER_NAME_CANNOT_BE_EMPTY = 3220
+OBSOLETE_ER_AUDIT_LOG_JSON_USER_NAME_CANNOT_BE_EMPTY = 3221
+OBSOLETE_ER_AUDIT_LOG_JSON_FILTER_DOES_NOT_EXISTS = 3222
+OBSOLETE_ER_AUDIT_LOG_USER_FIRST_CHARACTER_MUST_BE_ALPHANUMERIC = 3223
+OBSOLETE_ER_AUDIT_LOG_USER_NAME_INVALID_CHARACTER = 3224
+OBSOLETE_ER_AUDIT_LOG_HOST_NAME_INVALID_CHARACTER = 3225
+ER_UNSUPPORT_COMPRESSED_TEMPORARY_TABLE = 3500
+ER_ACL_OPERATION_FAILED = 3501
+ER_UNSUPPORTED_INDEX_ALGORITHM = 3502
+ER_NO_SUCH_DB = 3503
+ER_TOO_BIG_ENUM = 3504
+ER_TOO_LONG_SET_ENUM_VALUE = 3505
+ER_INVALID_DD_OBJECT = 3506
+ER_UPDATING_DD_TABLE = 3507
+ER_INVALID_DD_OBJECT_ID = 3508
+ER_INVALID_DD_OBJECT_NAME = 3509
+ER_TABLESPACE_MISSING_WITH_NAME = 3510
+ER_TOO_LONG_ROUTINE_COMMENT = 3511
+ER_SP_LOAD_FAILED = 3512
+ER_INVALID_BITWISE_OPERANDS_SIZE = 3513
+ER_INVALID_BITWISE_AGGREGATE_OPERANDS_SIZE = 3514
+ER_WARN_UNSUPPORTED_HINT = 3515
+ER_UNEXPECTED_GEOMETRY_TYPE = 3516
+ER_SRS_PARSE_ERROR = 3517
+ER_SRS_PROJ_PARAMETER_MISSING = 3518
+ER_WARN_SRS_NOT_FOUND = 3519
+ER_SRS_NOT_CARTESIAN = 3520
+ER_SRS_NOT_CARTESIAN_UNDEFINED = 3521
+ER_PK_INDEX_CANT_BE_INVISIBLE = 3522
+ER_UNKNOWN_AUTHID = 3523
+ER_FAILED_ROLE_GRANT = 3524
+ER_OPEN_ROLE_TABLES = 3525
+ER_FAILED_DEFAULT_ROLES = 3526
+ER_COMPONENTS_NO_SCHEME = 3527
+ER_COMPONENTS_NO_SCHEME_SERVICE = 3528
+ER_COMPONENTS_CANT_LOAD = 3529
+ER_ROLE_NOT_GRANTED = 3530
+ER_FAILED_REVOKE_ROLE = 3531
+ER_RENAME_ROLE = 3532
+ER_COMPONENTS_CANT_ACQUIRE_SERVICE_IMPLEMENTATION = 3533
+ER_COMPONENTS_CANT_SATISFY_DEPENDENCY = 3534
+ER_COMPONENTS_LOAD_CANT_REGISTER_SERVICE_IMPLEMENTATION = 3535
+ER_COMPONENTS_LOAD_CANT_INITIALIZE = 3536
+ER_COMPONENTS_UNLOAD_NOT_LOADED = 3537
+ER_COMPONENTS_UNLOAD_CANT_DEINITIALIZE = 3538
+ER_COMPONENTS_CANT_RELEASE_SERVICE = 3539
+ER_COMPONENTS_UNLOAD_CANT_UNREGISTER_SERVICE = 3540
+ER_COMPONENTS_CANT_UNLOAD = 3541
+ER_WARN_UNLOAD_THE_NOT_PERSISTED = 3542
+ER_COMPONENT_TABLE_INCORRECT = 3543
+ER_COMPONENT_MANIPULATE_ROW_FAILED = 3544
+ER_COMPONENTS_UNLOAD_DUPLICATE_IN_GROUP = 3545
+ER_CANT_SET_GTID_PURGED_DUE_SETS_CONSTRAINTS = 3546
+ER_CANNOT_LOCK_USER_MANAGEMENT_CACHES = 3547
+ER_SRS_NOT_FOUND = 3548
+ER_VARIABLE_NOT_PERSISTED = 3549
+ER_IS_QUERY_INVALID_CLAUSE = 3550
+ER_UNABLE_TO_STORE_STATISTICS = 3551
+ER_NO_SYSTEM_SCHEMA_ACCESS = 3552
+ER_NO_SYSTEM_TABLESPACE_ACCESS = 3553
+ER_NO_SYSTEM_TABLE_ACCESS = 3554
+ER_NO_SYSTEM_TABLE_ACCESS_FOR_DICTIONARY_TABLE = 3555
+ER_NO_SYSTEM_TABLE_ACCESS_FOR_SYSTEM_TABLE = 3556
+ER_NO_SYSTEM_TABLE_ACCESS_FOR_TABLE = 3557
+ER_INVALID_OPTION_KEY = 3558
+ER_INVALID_OPTION_VALUE = 3559
+ER_INVALID_OPTION_KEY_VALUE_PAIR = 3560
+ER_INVALID_OPTION_START_CHARACTER = 3561
+ER_INVALID_OPTION_END_CHARACTER = 3562
+ER_INVALID_OPTION_CHARACTERS = 3563
+ER_DUPLICATE_OPTION_KEY = 3564
+ER_WARN_SRS_NOT_FOUND_AXIS_ORDER = 3565
+ER_NO_ACCESS_TO_NATIVE_FCT = 3566
+ER_RESET_MASTER_TO_VALUE_OUT_OF_RANGE = 3567
+ER_UNRESOLVED_TABLE_LOCK = 3568
+ER_DUPLICATE_TABLE_LOCK = 3569
+ER_BINLOG_UNSAFE_SKIP_LOCKED = 3570
+ER_BINLOG_UNSAFE_NOWAIT = 3571
+ER_LOCK_NOWAIT = 3572
+ER_CTE_RECURSIVE_REQUIRES_UNION = 3573
+ER_CTE_RECURSIVE_REQUIRES_NONRECURSIVE_FIRST = 3574
+ER_CTE_RECURSIVE_FORBIDS_AGGREGATION = 3575
+ER_CTE_RECURSIVE_FORBIDDEN_JOIN_ORDER = 3576
+ER_CTE_RECURSIVE_REQUIRES_SINGLE_REFERENCE = 3577
+ER_SWITCH_TMP_ENGINE = 3578
+ER_WINDOW_NO_SUCH_WINDOW = 3579
+ER_WINDOW_CIRCULARITY_IN_WINDOW_GRAPH = 3580
+ER_WINDOW_NO_CHILD_PARTITIONING = 3581
+ER_WINDOW_NO_INHERIT_FRAME = 3582
+ER_WINDOW_NO_REDEFINE_ORDER_BY = 3583
+ER_WINDOW_FRAME_START_ILLEGAL = 3584
+ER_WINDOW_FRAME_END_ILLEGAL = 3585
+ER_WINDOW_FRAME_ILLEGAL = 3586
+ER_WINDOW_RANGE_FRAME_ORDER_TYPE = 3587
+ER_WINDOW_RANGE_FRAME_TEMPORAL_TYPE = 3588
+ER_WINDOW_RANGE_FRAME_NUMERIC_TYPE = 3589
+ER_WINDOW_RANGE_BOUND_NOT_CONSTANT = 3590
+ER_WINDOW_DUPLICATE_NAME = 3591
+ER_WINDOW_ILLEGAL_ORDER_BY = 3592
+ER_WINDOW_INVALID_WINDOW_FUNC_USE = 3593
+ER_WINDOW_INVALID_WINDOW_FUNC_ALIAS_USE = 3594
+ER_WINDOW_NESTED_WINDOW_FUNC_USE_IN_WINDOW_SPEC = 3595
+ER_WINDOW_ROWS_INTERVAL_USE = 3596
+ER_WINDOW_NO_GROUP_ORDER = 3597
+ER_WINDOW_EXPLAIN_JSON = 3598
+ER_WINDOW_FUNCTION_IGNORES_FRAME = 3599
+ER_WL9236_NOW_UNUSED = 3600
+ER_INVALID_NO_OF_ARGS = 3601
+ER_FIELD_IN_GROUPING_NOT_GROUP_BY = 3602
+ER_TOO_LONG_TABLESPACE_COMMENT = 3603
+ER_ENGINE_CANT_DROP_TABLE = 3604
+ER_ENGINE_CANT_DROP_MISSING_TABLE = 3605
+ER_TABLESPACE_DUP_FILENAME = 3606
+ER_DB_DROP_RMDIR2 = 3607
+ER_IMP_NO_FILES_MATCHED = 3608
+ER_IMP_SCHEMA_DOES_NOT_EXIST = 3609
+ER_IMP_TABLE_ALREADY_EXISTS = 3610
+ER_IMP_INCOMPATIBLE_MYSQLD_VERSION = 3611
+ER_IMP_INCOMPATIBLE_DD_VERSION = 3612
+ER_IMP_INCOMPATIBLE_SDI_VERSION = 3613
+ER_WARN_INVALID_HINT = 3614
+ER_VAR_DOES_NOT_EXIST = 3615
+ER_LONGITUDE_OUT_OF_RANGE = 3616
+ER_LATITUDE_OUT_OF_RANGE = 3617
+ER_NOT_IMPLEMENTED_FOR_GEOGRAPHIC_SRS = 3618
+ER_ILLEGAL_PRIVILEGE_LEVEL = 3619
+ER_NO_SYSTEM_VIEW_ACCESS = 3620
+ER_COMPONENT_FILTER_FLABBERGASTED = 3621
+ER_PART_EXPR_TOO_LONG = 3622
+ER_UDF_DROP_DYNAMICALLY_REGISTERED = 3623
+ER_UNABLE_TO_STORE_COLUMN_STATISTICS = 3624
+ER_UNABLE_TO_UPDATE_COLUMN_STATISTICS = 3625
+ER_UNABLE_TO_DROP_COLUMN_STATISTICS = 3626
+ER_UNABLE_TO_BUILD_HISTOGRAM = 3627
+ER_MANDATORY_ROLE = 3628
+ER_MISSING_TABLESPACE_FILE = 3629
+ER_PERSIST_ONLY_ACCESS_DENIED_ERROR = 3630
+ER_CMD_NEED_SUPER = 3631
+ER_PATH_IN_DATADIR = 3632
+ER_DDL_IN_PROGRESS = 3633
+ER_TOO_MANY_CONCURRENT_CLONES = 3634
+ER_APPLIER_LOG_EVENT_VALIDATION_ERROR = 3635
+ER_CTE_MAX_RECURSION_DEPTH = 3636
+ER_NOT_HINT_UPDATABLE_VARIABLE = 3637
+ER_CREDENTIALS_CONTRADICT_TO_HISTORY = 3638
+ER_WARNING_PASSWORD_HISTORY_CLAUSES_VOID = 3639
+ER_CLIENT_DOES_NOT_SUPPORT = 3640
+ER_I_S_SKIPPED_TABLESPACE = 3641
+ER_TABLESPACE_ENGINE_MISMATCH = 3642
+ER_WRONG_SRID_FOR_COLUMN = 3643
+ER_CANNOT_ALTER_SRID_DUE_TO_INDEX = 3644
+ER_WARN_BINLOG_PARTIAL_UPDATES_DISABLED = 3645
+ER_WARN_BINLOG_V1_ROW_EVENTS_DISABLED = 3646
+ER_WARN_BINLOG_PARTIAL_UPDATES_SUGGESTS_PARTIAL_IMAGES = 3647
+ER_COULD_NOT_APPLY_JSON_DIFF = 3648
+ER_CORRUPTED_JSON_DIFF = 3649
+ER_RESOURCE_GROUP_EXISTS = 3650
+ER_RESOURCE_GROUP_NOT_EXISTS = 3651
+ER_INVALID_VCPU_ID = 3652
+ER_INVALID_VCPU_RANGE = 3653
+ER_INVALID_THREAD_PRIORITY = 3654
+ER_DISALLOWED_OPERATION = 3655
+ER_RESOURCE_GROUP_BUSY = 3656
+ER_RESOURCE_GROUP_DISABLED = 3657
+ER_FEATURE_UNSUPPORTED = 3658
+ER_ATTRIBUTE_IGNORED = 3659
+ER_INVALID_THREAD_ID = 3660
+ER_RESOURCE_GROUP_BIND_FAILED = 3661
+ER_INVALID_USE_OF_FORCE_OPTION = 3662
+ER_GROUP_REPLICATION_COMMAND_FAILURE = 3663
+ER_SDI_OPERATION_FAILED = 3664
+ER_MISSING_JSON_TABLE_VALUE = 3665
+ER_WRONG_JSON_TABLE_VALUE = 3666
+ER_TF_MUST_HAVE_ALIAS = 3667
+ER_TF_FORBIDDEN_JOIN_TYPE = 3668
+ER_JT_VALUE_OUT_OF_RANGE = 3669
+ER_JT_MAX_NESTED_PATH = 3670
+ER_PASSWORD_EXPIRATION_NOT_SUPPORTED_BY_AUTH_METHOD = 3671
+ER_INVALID_GEOJSON_CRS_NOT_TOP_LEVEL = 3672
+ER_BAD_NULL_ERROR_NOT_IGNORED = 3673
+WARN_USELESS_SPATIAL_INDEX = 3674
+ER_DISK_FULL_NOWAIT = 3675
+ER_PARSE_ERROR_IN_DIGEST_FN = 3676
+ER_UNDISCLOSED_PARSE_ERROR_IN_DIGEST_FN = 3677
+ER_SCHEMA_DIR_EXISTS = 3678
+ER_SCHEMA_DIR_MISSING = 3679
+ER_SCHEMA_DIR_CREATE_FAILED = 3680
+ER_SCHEMA_DIR_UNKNOWN = 3681
+ER_ONLY_IMPLEMENTED_FOR_SRID_0_AND_4326 = 3682
+ER_BINLOG_EXPIRE_LOG_DAYS_AND_SECS_USED_TOGETHER = 3683
+ER_REGEXP_BUFFER_OVERFLOW = 3684
+ER_REGEXP_ILLEGAL_ARGUMENT = 3685
+ER_REGEXP_INDEX_OUTOFBOUNDS_ERROR = 3686
+ER_REGEXP_INTERNAL_ERROR = 3687
+ER_REGEXP_RULE_SYNTAX = 3688
+ER_REGEXP_BAD_ESCAPE_SEQUENCE = 3689
+ER_REGEXP_UNIMPLEMENTED = 3690
+ER_REGEXP_MISMATCHED_PAREN = 3691
+ER_REGEXP_BAD_INTERVAL = 3692
+ER_REGEXP_MAX_LT_MIN = 3693
+ER_REGEXP_INVALID_BACK_REF = 3694
+ER_REGEXP_LOOK_BEHIND_LIMIT = 3695
+ER_REGEXP_MISSING_CLOSE_BRACKET = 3696
+ER_REGEXP_INVALID_RANGE = 3697
+ER_REGEXP_STACK_OVERFLOW = 3698
+ER_REGEXP_TIME_OUT = 3699
+ER_REGEXP_PATTERN_TOO_BIG = 3700
+ER_CANT_SET_ERROR_LOG_SERVICE = 3701
+ER_EMPTY_PIPELINE_FOR_ERROR_LOG_SERVICE = 3702
+ER_COMPONENT_FILTER_DIAGNOSTICS = 3703
+ER_NOT_IMPLEMENTED_FOR_CARTESIAN_SRS = 3704
+ER_NOT_IMPLEMENTED_FOR_PROJECTED_SRS = 3705
+ER_NONPOSITIVE_RADIUS = 3706
+ER_RESTART_SERVER_FAILED = 3707
+ER_SRS_MISSING_MANDATORY_ATTRIBUTE = 3708
+ER_SRS_MULTIPLE_ATTRIBUTE_DEFINITIONS = 3709
+ER_SRS_NAME_CANT_BE_EMPTY_OR_WHITESPACE = 3710
+ER_SRS_ORGANIZATION_CANT_BE_EMPTY_OR_WHITESPACE = 3711
+ER_SRS_ID_ALREADY_EXISTS = 3712
+ER_WARN_SRS_ID_ALREADY_EXISTS = 3713
+ER_CANT_MODIFY_SRID_0 = 3714
+ER_WARN_RESERVED_SRID_RANGE = 3715
+ER_CANT_MODIFY_SRS_USED_BY_COLUMN = 3716
+ER_SRS_INVALID_CHARACTER_IN_ATTRIBUTE = 3717
+ER_SRS_ATTRIBUTE_STRING_TOO_LONG = 3718
+ER_DEPRECATED_UTF8_ALIAS = 3719
+ER_DEPRECATED_NATIONAL = 3720
+ER_INVALID_DEFAULT_UTF8MB4_COLLATION = 3721
+ER_UNABLE_TO_COLLECT_INSTANCE_LOG_STATUS = 3722
+ER_RESERVED_TABLESPACE_NAME = 3723
+ER_UNABLE_TO_SET_OPTION = 3724
+ER_SLAVE_POSSIBLY_DIVERGED_AFTER_DDL = 3725
+ER_PARSER_TRACE = 10000
+ER_BOOTSTRAP_CANT_THREAD = 10001
+ER_TRIGGER_INVALID_VALUE = 10002
+ER_OPT_WRONG_TREE = 10003
+ER_DD_FAILSAFE = 10004
+ER_DD_NO_WRITES_NO_REPOPULATION = 10005
+ER_DD_VERSION_FOUND = 10006
+ER_DD_VERSION_INSTALLED = 10007
+ER_DD_VERSION_UNSUPPORTED = 10008
+ER_LOG_SYSLOG_FACILITY_FAIL = 10009
+ER_LOG_SYSLOG_CANNOT_OPEN = 10010
+ER_LOG_SLOW_CANNOT_OPEN = 10011
+ER_LOG_GENERAL_CANNOT_OPEN = 10012
+ER_LOG_CANNOT_WRITE = 10013
+ER_RPL_ZOMBIE_ENCOUNTERED = 10014
+ER_RPL_GTID_TABLE_CANNOT_OPEN = 10015
+ER_SYSTEM_SCHEMA_NOT_FOUND = 10016
+ER_DD_INIT_UPGRADE_FAILED = 10017
+ER_VIEW_UNKNOWN_CHARSET_OR_COLLATION = 10018
+ER_DD_VIEW_CANT_ALLOC_CHARSET = 10019
+ER_DD_INIT_FAILED = 10020
+ER_DD_UPDATING_PLUGIN_MD_FAILED = 10021
+ER_DD_POPULATING_TABLES_FAILED = 10022
+ER_DD_VIEW_CANT_CREATE = 10023
+ER_DD_METADATA_NOT_FOUND = 10024
+ER_DD_CACHE_NOT_EMPTY_AT_SHUTDOWN = 10025
+ER_DD_OBJECT_REMAINS = 10026
+ER_DD_OBJECT_REMAINS_IN_RELEASER = 10027
+ER_DD_OBJECT_RELEASER_REMAINS = 10028
+ER_DD_CANT_GET_OBJECT_KEY = 10029
+ER_DD_CANT_CREATE_OBJECT_KEY = 10030
+ER_CANT_CREATE_HANDLE_MGR_THREAD = 10031
+ER_RPL_REPO_HAS_GAPS = 10032
+ER_INVALID_VALUE_FOR_ENFORCE_GTID_CONSISTENCY = 10033
+ER_CHANGED_ENFORCE_GTID_CONSISTENCY = 10034
+ER_CHANGED_GTID_MODE = 10035
+ER_DISABLED_STORAGE_ENGINE_AS_DEFAULT = 10036
+ER_DEBUG_SYNC_HIT = 10037
+ER_DEBUG_SYNC_EXECUTED = 10038
+ER_DEBUG_SYNC_THREAD_MAX = 10039
+ER_DEBUG_SYNC_OOM = 10040
+ER_CANT_INIT_TC_LOG = 10041
+ER_EVENT_CANT_INIT_QUEUE = 10042
+ER_EVENT_PURGING_QUEUE = 10043
+ER_EVENT_LAST_EXECUTION = 10044
+ER_EVENT_MESSAGE_STACK = 10045
+ER_EVENT_EXECUTION_FAILED = 10046
+ER_CANT_INIT_SCHEDULER_THREAD = 10047
+ER_SCHEDULER_STOPPED = 10048
+ER_CANT_CREATE_SCHEDULER_THREAD = 10049
+ER_SCHEDULER_WAITING = 10050
+ER_SCHEDULER_STARTED = 10051
+ER_SCHEDULER_STOPPING_FAILED_TO_GET_EVENT = 10052
+ER_SCHEDULER_STOPPING_FAILED_TO_CREATE_WORKER = 10053
+ER_SCHEDULER_KILLING = 10054
+ER_UNABLE_TO_RESOLVE_IP = 10055
+ER_UNABLE_TO_RESOLVE_HOSTNAME = 10056
+ER_HOSTNAME_RESEMBLES_IPV4 = 10057
+ER_HOSTNAME_DOESNT_RESOLVE_TO = 10058
+ER_ADDRESSES_FOR_HOSTNAME_HEADER = 10059
+ER_ADDRESSES_FOR_HOSTNAME_LIST_ITEM = 10060
+ER_TRG_WITHOUT_DEFINER = 10061
+ER_TRG_NO_CLIENT_CHARSET = 10062
+ER_PARSING_VIEW = 10063
+ER_COMPONENTS_INFRASTRUCTURE_BOOTSTRAP = 10064
+ER_COMPONENTS_INFRASTRUCTURE_SHUTDOWN = 10065
+ER_COMPONENTS_PERSIST_LOADER_BOOTSTRAP = 10066
+ER_DEPART_WITH_GRACE = 10067
+ER_CA_SELF_SIGNED = 10068
+ER_SSL_LIBRARY_ERROR = 10069
+ER_NO_THD_NO_UUID = 10070
+ER_UUID_SALT = 10071
+ER_UUID_IS = 10072
+ER_UUID_INVALID = 10073
+ER_UUID_SCRUB = 10074
+ER_CREATING_NEW_UUID = 10075
+ER_CANT_CREATE_UUID = 10076
+ER_UNKNOWN_UNSUPPORTED_STORAGE_ENGINE = 10077
+ER_SECURE_AUTH_VALUE_UNSUPPORTED = 10078
+ER_INVALID_INSTRUMENT = 10079
+ER_INNODB_MANDATORY = 10080
+OBSOLETE_ER_INNODB_CANNOT_BE_IGNORED = 10081
+ER_OLD_PASSWORDS_NO_MIDDLE_GROUND = 10082
+ER_VERBOSE_REQUIRES_HELP = 10083
+ER_POINTLESS_WITHOUT_SLOWLOG = 10084
+ER_WASTEFUL_NET_BUFFER_SIZE = 10085
+ER_DEPRECATED_TIMESTAMP_IMPLICIT_DEFAULTS = 10086
+ER_FT_BOOL_SYNTAX_INVALID = 10087
+ER_CREDENTIALLESS_AUTO_USER_BAD = 10088
+ER_CONNECTION_HANDLING_OOM = 10089
+ER_THREAD_HANDLING_OOM = 10090
+ER_CANT_CREATE_TEST_FILE = 10091
+ER_CANT_CREATE_PID_FILE = 10092
+ER_CANT_REMOVE_PID_FILE = 10093
+ER_CANT_CREATE_SHUTDOWN_THREAD = 10094
+ER_SEC_FILE_PRIV_CANT_ACCESS_DIR = 10095
+ER_SEC_FILE_PRIV_IGNORED = 10096
+ER_SEC_FILE_PRIV_EMPTY = 10097
+ER_SEC_FILE_PRIV_NULL = 10098
+ER_SEC_FILE_PRIV_DIRECTORY_INSECURE = 10099
+ER_SEC_FILE_PRIV_CANT_STAT = 10100
+ER_SEC_FILE_PRIV_DIRECTORY_PERMISSIONS = 10101
+ER_SEC_FILE_PRIV_ARGUMENT_TOO_LONG = 10102
+ER_CANT_CREATE_NAMED_PIPES_THREAD = 10103
+ER_CANT_CREATE_TCPIP_THREAD = 10104
+ER_CANT_CREATE_SHM_THREAD = 10105
+ER_CANT_CREATE_INTERRUPT_THREAD = 10106
+ER_WRITABLE_CONFIG_REMOVED = 10107
+ER_CORE_VALUES = 10108
+ER_WRONG_DATETIME_SPEC = 10109
+ER_RPL_BINLOG_FILTERS_OOM = 10110
+ER_KEYCACHE_OOM = 10111
+ER_CONFIRMING_THE_FUTURE = 10112
+ER_BACK_IN_TIME = 10113
+ER_FUTURE_DATE = 10114
+ER_UNSUPPORTED_DATE = 10115
+ER_STARTING_AS = 10116
+ER_SHUTTING_DOWN_SLAVE_THREADS = 10117
+ER_DISCONNECTING_REMAINING_CLIENTS = 10118
+ER_ABORTING = 10119
+ER_BINLOG_END = 10120
+ER_CALL_ME_LOCALHOST = 10121
+ER_USER_REQUIRES_ROOT = 10122
+ER_REALLY_RUN_AS_ROOT = 10123
+ER_USER_WHAT_USER = 10124
+ER_TRANSPORTS_WHAT_TRANSPORTS = 10125
+ER_FAIL_SETGID = 10126
+ER_FAIL_SETUID = 10127
+ER_FAIL_SETREGID = 10128
+ER_FAIL_SETREUID = 10129
+ER_FAIL_CHROOT = 10130
+ER_WIN_LISTEN_BUT_HOW = 10131
+ER_NOT_RIGHT_NOW = 10132
+ER_FIXING_CLIENT_CHARSET = 10133
+ER_OOM = 10134
+ER_FAILED_TO_LOCK_MEM = 10135
+ER_MYINIT_FAILED = 10136
+ER_BEG_INITFILE = 10137
+ER_END_INITFILE = 10138
+ER_CHANGED_MAX_OPEN_FILES = 10139
+ER_CANT_INCREASE_MAX_OPEN_FILES = 10140
+ER_CHANGED_MAX_CONNECTIONS = 10141
+ER_CHANGED_TABLE_OPEN_CACHE = 10142
+ER_THE_USER_ABIDES = 10143
+ER_RPL_CANT_ADD_DO_TABLE = 10144
+ER_RPL_CANT_ADD_IGNORE_TABLE = 10145
+ER_TRACK_VARIABLES_BOGUS = 10146
+ER_EXCESS_ARGUMENTS = 10147
+ER_VERBOSE_HINT = 10148
+ER_CANT_READ_ERRMSGS = 10149
+ER_CANT_INIT_DBS = 10150
+ER_LOG_OUTPUT_CONTRADICTORY = 10151
+ER_NO_CSV_NO_LOG_TABLES = 10152
+ER_RPL_REWRITEDB_MISSING_ARROW = 10153
+ER_RPL_REWRITEDB_EMPTY_FROM = 10154
+ER_RPL_REWRITEDB_EMPTY_TO = 10155
+ER_LOG_FILES_GIVEN_LOG_OUTPUT_IS_TABLE = 10156
+ER_LOG_FILE_INVALID = 10157
+ER_LOWER_CASE_TABLE_NAMES_CS_DD_ON_CI_FS_UNSUPPORTED = 10158
+ER_LOWER_CASE_TABLE_NAMES_USING_2 = 10159
+ER_LOWER_CASE_TABLE_NAMES_USING_0 = 10160
+ER_NEED_LOG_BIN = 10161
+ER_NEED_FILE_INSTEAD_OF_DIR = 10162
+ER_LOG_BIN_BETTER_WITH_NAME = 10163
+ER_BINLOG_NEEDS_SERVERID = 10164
+ER_RPL_CANT_MAKE_PATHS = 10165
+ER_CANT_INITIALIZE_GTID = 10166
+ER_CANT_INITIALIZE_EARLY_PLUGINS = 10167
+ER_CANT_INITIALIZE_BUILTIN_PLUGINS = 10168
+ER_CANT_INITIALIZE_DYNAMIC_PLUGINS = 10169
+ER_PERFSCHEMA_INIT_FAILED = 10170
+ER_STACKSIZE_UNEXPECTED = 10171
+ER_CANT_SET_DATADIR = 10172
+ER_CANT_STAT_DATADIR = 10173
+ER_CANT_CHOWN_DATADIR = 10174
+ER_CANT_SET_UP_PERSISTED_VALUES = 10175
+ER_CANT_SAVE_GTIDS = 10176
+ER_AUTH_CANT_SET_DEFAULT_PLUGIN = 10177
+ER_CANT_JOIN_SHUTDOWN_THREAD = 10178
+ER_CANT_HASH_DO_AND_IGNORE_RULES = 10179
+ER_CANT_OPEN_CA = 10180
+ER_CANT_ACCESS_CAPATH = 10181
+ER_SSL_TRYING_DATADIR_DEFAULTS = 10182
+ER_AUTO_OPTIONS_FAILED = 10183
+ER_CANT_INIT_TIMER = 10184
+ER_SERVERID_TOO_LARGE = 10185
+ER_DEFAULT_SE_UNAVAILABLE = 10186
+ER_CANT_OPEN_ERROR_LOG = 10187
+ER_INVALID_ERROR_LOG_NAME = 10188
+ER_RPL_INFINITY_DENIED = 10189
+ER_RPL_INFINITY_IGNORED = 10190
+ER_NDB_TABLES_NOT_READY = 10191
+ER_TABLE_CHECK_INTACT = 10192
+ER_DD_TABLESPACE_NOT_FOUND = 10193
+ER_DD_TRG_CONNECTION_COLLATION_MISSING = 10194
+ER_DD_TRG_DB_COLLATION_MISSING = 10195
+ER_DD_TRG_DEFINER_OOM = 10196
+ER_DD_TRG_FILE_UNREADABLE = 10197
+ER_TRG_CANT_PARSE = 10198
+ER_DD_TRG_CANT_ADD = 10199
+ER_DD_CANT_RESOLVE_VIEW = 10200
+ER_DD_VIEW_WITHOUT_DEFINER = 10201
+ER_PLUGIN_INIT_FAILED = 10202
+ER_RPL_TRX_DELEGATES_INIT_FAILED = 10203
+ER_RPL_BINLOG_STORAGE_DELEGATES_INIT_FAILED = 10204
+ER_RPL_BINLOG_TRANSMIT_DELEGATES_INIT_FAILED = 10205
+ER_RPL_BINLOG_RELAY_DELEGATES_INIT_FAILED = 10206
+ER_RPL_PLUGIN_FUNCTION_FAILED = 10207
+ER_SQL_HA_READ_FAILED = 10208
+ER_SR_BOGUS_VALUE = 10209
+ER_SR_INVALID_CONTEXT = 10210
+ER_READING_TABLE_FAILED = 10211
+ER_DES_FILE_WRONG_KEY = 10212
+ER_CANT_SET_PERSISTED = 10213
+ER_JSON_PARSE_ERROR = 10214
+ER_CONFIG_OPTION_WITHOUT_GROUP = 10215
+ER_VALGRIND_DO_QUICK_LEAK_CHECK = 10216
+ER_VALGRIND_COUNT_LEAKS = 10217
+ER_LOAD_DATA_INFILE_FAILED_IN_UNEXPECTED_WAY = 10218
+ER_UNKNOWN_ERROR_NUMBER = 10219
+ER_UDF_CANT_ALLOC_FOR_STRUCTURES = 10220
+ER_UDF_CANT_ALLOC_FOR_FUNCTION = 10221
+ER_UDF_INVALID_ROW_IN_FUNCTION_TABLE = 10222
+ER_UDF_CANT_OPEN_FUNCTION_TABLE = 10223
+ER_XA_RECOVER_FOUND_TRX_IN_SE = 10224
+ER_XA_RECOVER_FOUND_XA_TRX = 10225
+ER_XA_IGNORING_XID = 10226
+ER_XA_COMMITTING_XID = 10227
+ER_XA_ROLLING_BACK_XID = 10228
+ER_XA_STARTING_RECOVERY = 10229
+ER_XA_NO_MULTI_2PC_HEURISTIC_RECOVER = 10230
+ER_XA_RECOVER_EXPLANATION = 10231
+ER_XA_RECOVERY_DONE = 10232
+ER_TRX_GTID_COLLECT_REJECT = 10233
+ER_SQL_AUTHOR_DEFAULT_ROLES_FAIL = 10234
+ER_SQL_USER_TABLE_CREATE_WARNING = 10235
+ER_SQL_USER_TABLE_ALTER_WARNING = 10236
+ER_ROW_IN_WRONG_PARTITION_PLEASE_REPAIR = 10237
+ER_MYISAM_CRASHED_ERROR_IN_THREAD = 10238
+ER_MYISAM_CRASHED_ERROR_IN = 10239
+ER_TOO_MANY_STORAGE_ENGINES = 10240
+ER_SE_TYPECODE_CONFLICT = 10241
+ER_TRX_WRITE_SET_OOM = 10242
+ER_HANDLERTON_OOM = 10243
+ER_CONN_SHM_LISTENER = 10244
+ER_CONN_SHM_CANT_CREATE_SERVICE = 10245
+ER_CONN_SHM_CANT_CREATE_CONNECTION = 10246
+ER_CONN_PIP_CANT_CREATE_EVENT = 10247
+ER_CONN_PIP_CANT_CREATE_PIPE = 10248
+ER_CONN_PER_THREAD_NO_THREAD = 10249
+ER_CONN_TCP_NO_SOCKET = 10250
+ER_CONN_TCP_CREATED = 10251
+ER_CONN_TCP_ADDRESS = 10252
+ER_CONN_TCP_IPV6_AVAILABLE = 10253
+ER_CONN_TCP_IPV6_UNAVAILABLE = 10254
+ER_CONN_TCP_ERROR_WITH_STRERROR = 10255
+ER_CONN_TCP_CANT_RESOLVE_HOSTNAME = 10256
+ER_CONN_TCP_IS_THERE_ANOTHER_USING_PORT = 10257
+ER_CONN_UNIX_IS_THERE_ANOTHER_USING_SOCKET = 10258
+ER_CONN_UNIX_PID_CLAIMED_SOCKET_FILE = 10259
+ER_CONN_TCP_CANT_RESET_V6ONLY = 10260
+ER_CONN_TCP_BIND_RETRY = 10261
+ER_CONN_TPC_BIND_FAIL = 10262
+ER_CONN_TCP_IP_NOT_LOGGED = 10263
+ER_CONN_TCP_RESOLVE_INFO = 10264
+ER_CONN_TCP_START_FAIL = 10265
+ER_CONN_TCP_LISTEN_FAIL = 10266
+ER_CONN_UNIX_PATH_TOO_LONG = 10267
+ER_CONN_UNIX_LOCK_FILE_FAIL = 10268
+ER_CONN_UNIX_NO_FD = 10269
+ER_CONN_UNIX_NO_BIND_NO_START = 10270
+ER_CONN_UNIX_LISTEN_FAILED = 10271
+ER_CONN_UNIX_LOCK_FILE_GIVING_UP = 10272
+ER_CONN_UNIX_LOCK_FILE_CANT_CREATE = 10273
+ER_CONN_UNIX_LOCK_FILE_CANT_OPEN = 10274
+ER_CONN_UNIX_LOCK_FILE_CANT_READ = 10275
+ER_CONN_UNIX_LOCK_FILE_EMPTY = 10276
+ER_CONN_UNIX_LOCK_FILE_PIDLESS = 10277
+ER_CONN_UNIX_LOCK_FILE_CANT_WRITE = 10278
+ER_CONN_UNIX_LOCK_FILE_CANT_DELETE = 10279
+ER_CONN_UNIX_LOCK_FILE_CANT_SYNC = 10280
+ER_CONN_UNIX_LOCK_FILE_CANT_CLOSE = 10281
+ER_CONN_SOCKET_SELECT_FAILED = 10282
+ER_CONN_SOCKET_ACCEPT_FAILED = 10283
+ER_AUTH_RSA_CANT_FIND = 10284
+ER_AUTH_RSA_CANT_PARSE = 10285
+ER_AUTH_RSA_CANT_READ = 10286
+ER_AUTH_RSA_FILES_NOT_FOUND = 10287
+ER_CONN_ATTR_TRUNCATED = 10288
+ER_X509_CIPHERS_MISMATCH = 10289
+ER_X509_ISSUER_MISMATCH = 10290
+ER_X509_SUBJECT_MISMATCH = 10291
+ER_AUTH_CANT_ACTIVATE_ROLE = 10292
+ER_X509_NEEDS_RSA_PRIVKEY = 10293
+ER_X509_CANT_WRITE_KEY = 10294
+ER_X509_CANT_CHMOD_KEY = 10295
+ER_X509_CANT_READ_CA_KEY = 10296
+ER_X509_CANT_READ_CA_CERT = 10297
+ER_X509_CANT_CREATE_CERT = 10298
+ER_X509_CANT_WRITE_CERT = 10299
+ER_AUTH_CANT_CREATE_RSA_PAIR = 10300
+ER_AUTH_CANT_WRITE_PRIVKEY = 10301
+ER_AUTH_CANT_WRITE_PUBKEY = 10302
+ER_AUTH_SSL_CONF_PREVENTS_CERT_GENERATION = 10303
+ER_AUTH_USING_EXISTING_CERTS = 10304
+ER_AUTH_CERTS_SAVED_TO_DATADIR = 10305
+ER_AUTH_CERT_GENERATION_DISABLED = 10306
+ER_AUTH_RSA_CONF_PREVENTS_KEY_GENERATION = 10307
+ER_AUTH_KEY_GENERATION_SKIPPED_PAIR_PRESENT = 10308
+ER_AUTH_KEYS_SAVED_TO_DATADIR = 10309
+ER_AUTH_KEY_GENERATION_DISABLED = 10310
+ER_AUTHCACHE_PROXIES_PRIV_SKIPPED_NEEDS_RESOLVE = 10311
+ER_AUTHCACHE_PLUGIN_MISSING = 10312
+ER_AUTHCACHE_PLUGIN_CONFIG = 10313
+OBSOLETE_ER_AUTHCACHE_ROLE_TABLES_DODGY = 10314
+ER_AUTHCACHE_USER_SKIPPED_NEEDS_RESOLVE = 10315
+ER_AUTHCACHE_USER_TABLE_DODGY = 10316
+ER_AUTHCACHE_USER_IGNORED_DEPRECATED_PASSWORD = 10317
+ER_AUTHCACHE_USER_IGNORED_NEEDS_PLUGIN = 10318
+ER_AUTHCACHE_USER_IGNORED_INVALID_PASSWORD = 10319
+ER_AUTHCACHE_EXPIRED_PASSWORD_UNSUPPORTED = 10320
+ER_NO_SUPER_WITHOUT_USER_PLUGIN = 10321
+ER_AUTHCACHE_DB_IGNORED_EMPTY_NAME = 10322
+ER_AUTHCACHE_DB_SKIPPED_NEEDS_RESOLVE = 10323
+ER_AUTHCACHE_DB_ENTRY_LOWERCASED_REVOKE_WILL_FAIL = 10324
+ER_AUTHCACHE_TABLE_PROXIES_PRIV_MISSING = 10325
+ER_AUTHCACHE_CANT_OPEN_AND_LOCK_PRIVILEGE_TABLES = 10326
+ER_AUTHCACHE_CANT_INIT_GRANT_SUBSYSTEM = 10327
+ER_AUTHCACHE_PROCS_PRIV_SKIPPED_NEEDS_RESOLVE = 10328
+ER_AUTHCACHE_PROCS_PRIV_ENTRY_IGNORED_BAD_ROUTINE_TYPE = 10329
+ER_AUTHCACHE_TABLES_PRIV_SKIPPED_NEEDS_RESOLVE = 10330
+ER_USER_NOT_IN_EXTRA_USERS_BINLOG_POSSIBLY_INCOMPLETE = 10331
+ER_DD_SCHEMA_NOT_FOUND = 10332
+ER_DD_TABLE_NOT_FOUND = 10333
+ER_DD_SE_INIT_FAILED = 10334
+ER_DD_ABORTING_PARTIAL_UPGRADE = 10335
+ER_DD_FRM_EXISTS_FOR_TABLE = 10336
+ER_DD_CREATED_FOR_UPGRADE = 10337
+ER_ERRMSG_CANT_FIND_FILE = 10338
+ER_ERRMSG_LOADING_55_STYLE = 10339
+ER_ERRMSG_MISSING_IN_FILE = 10340
+ER_ERRMSG_OOM = 10341
+ER_ERRMSG_CANT_READ = 10342
+ER_TABLE_INCOMPATIBLE_DECIMAL_FIELD = 10343
+ER_TABLE_INCOMPATIBLE_YEAR_FIELD = 10344
+ER_INVALID_CHARSET_AND_DEFAULT_IS_MB = 10345
+ER_TABLE_WRONG_KEY_DEFINITION = 10346
+ER_CANT_OPEN_FRM_FILE = 10347
+ER_CANT_READ_FRM_FILE = 10348
+ER_TABLE_CREATED_WITH_DIFFERENT_VERSION = 10349
+ER_VIEW_UNPARSABLE = 10350
+ER_FILE_TYPE_UNKNOWN = 10351
+ER_INVALID_INFO_IN_FRM = 10352
+ER_CANT_OPEN_AND_LOCK_PRIVILEGE_TABLES = 10353
+ER_AUDIT_PLUGIN_DOES_NOT_SUPPORT_AUDIT_AUTH_EVENTS = 10354
+ER_AUDIT_PLUGIN_HAS_INVALID_DATA = 10355
+ER_TZ_OOM_INITIALIZING_TIME_ZONES = 10356
+ER_TZ_CANT_OPEN_AND_LOCK_TIME_ZONE_TABLE = 10357
+ER_TZ_OOM_LOADING_LEAP_SECOND_TABLE = 10358
+ER_TZ_TOO_MANY_LEAPS_IN_LEAP_SECOND_TABLE = 10359
+ER_TZ_ERROR_LOADING_LEAP_SECOND_TABLE = 10360
+ER_TZ_UNKNOWN_OR_ILLEGAL_DEFAULT_TIME_ZONE = 10361
+ER_TZ_CANT_FIND_DESCRIPTION_FOR_TIME_ZONE = 10362
+ER_TZ_CANT_FIND_DESCRIPTION_FOR_TIME_ZONE_ID = 10363
+ER_TZ_TRANSITION_TYPE_TABLE_TYPE_TOO_LARGE = 10364
+ER_TZ_TRANSITION_TYPE_TABLE_ABBREVIATIONS_EXCEED_SPACE = 10365
+ER_TZ_TRANSITION_TYPE_TABLE_LOAD_ERROR = 10366
+ER_TZ_TRANSITION_TABLE_TOO_MANY_TRANSITIONS = 10367
+ER_TZ_TRANSITION_TABLE_BAD_TRANSITION_TYPE = 10368
+ER_TZ_TRANSITION_TABLE_LOAD_ERROR = 10369
+ER_TZ_NO_TRANSITION_TYPES_IN_TIME_ZONE = 10370
+ER_TZ_OOM_LOADING_TIME_ZONE_DESCRIPTION = 10371
+ER_TZ_CANT_BUILD_MKTIME_MAP = 10372
+ER_TZ_OOM_WHILE_LOADING_TIME_ZONE = 10373
+ER_TZ_OOM_WHILE_SETTING_TIME_ZONE = 10374
+ER_SLAVE_SQL_THREAD_STOPPED_UNTIL_CONDITION_BAD = 10375
+ER_SLAVE_SQL_THREAD_STOPPED_UNTIL_POSITION_REACHED = 10376
+ER_SLAVE_SQL_THREAD_STOPPED_BEFORE_GTIDS_ALREADY_APPLIED = 10377
+ER_SLAVE_SQL_THREAD_STOPPED_BEFORE_GTIDS_REACHED = 10378
+ER_SLAVE_SQL_THREAD_STOPPED_AFTER_GTIDS_REACHED = 10379
+ER_SLAVE_SQL_THREAD_STOPPED_GAP_TRX_PROCESSED = 10380
+ER_GROUP_REPLICATION_PLUGIN_NOT_INSTALLED = 10381
+ER_GTID_ALREADY_ADDED_BY_USER = 10382
+ER_FAILED_TO_DELETE_FROM_GTID_EXECUTED_TABLE = 10383
+ER_FAILED_TO_COMPRESS_GTID_EXECUTED_TABLE = 10384
+ER_FAILED_TO_COMPRESS_GTID_EXECUTED_TABLE_OOM = 10385
+ER_FAILED_TO_INIT_THREAD_ATTR_FOR_GTID_TABLE_COMPRESSION = 10386
+ER_FAILED_TO_CREATE_GTID_TABLE_COMPRESSION_THREAD = 10387
+ER_FAILED_TO_JOIN_GTID_TABLE_COMPRESSION_THREAD = 10388
+ER_NPIPE_FAILED_TO_INIT_SECURITY_DESCRIPTOR = 10389
+ER_NPIPE_FAILED_TO_SET_SECURITY_DESCRIPTOR = 10390
+ER_NPIPE_PIPE_ALREADY_IN_USE = 10391
+ER_NDB_SLAVE_SAW_EPOCH_LOWER_THAN_PREVIOUS_ON_START = 10392
+ER_NDB_SLAVE_SAW_EPOCH_LOWER_THAN_PREVIOUS = 10393
+ER_NDB_SLAVE_SAW_ALREADY_COMMITTED_EPOCH = 10394
+ER_NDB_SLAVE_PREVIOUS_EPOCH_NOT_COMMITTED = 10395
+ER_NDB_SLAVE_MISSING_DATA_FOR_TIMESTAMP_COLUMN = 10396
+ER_NDB_SLAVE_LOGGING_EXCEPTIONS_TO = 10397
+ER_NDB_SLAVE_LOW_EPOCH_RESOLUTION = 10398
+ER_NDB_INFO_FOUND_UNEXPECTED_FIELD_TYPE = 10399
+ER_NDB_INFO_FAILED_TO_CREATE_NDBINFO = 10400
+ER_NDB_INFO_FAILED_TO_INIT_NDBINFO = 10401
+ER_NDB_CLUSTER_WRONG_NUMBER_OF_FUNCTION_ARGUMENTS = 10402
+ER_NDB_CLUSTER_SCHEMA_INFO = 10403
+ER_NDB_CLUSTER_GENERIC_MESSAGE = 10404
+ER_RPL_CANT_OPEN_INFO_TABLE = 10405
+ER_RPL_CANT_SCAN_INFO_TABLE = 10406
+ER_RPL_CORRUPTED_INFO_TABLE = 10407
+ER_RPL_CORRUPTED_KEYS_IN_INFO_TABLE = 10408
+ER_RPL_WORKER_ID_IS = 10409
+ER_RPL_INCONSISTENT_TIMESTAMPS_IN_TRX = 10410
+ER_RPL_INCONSISTENT_SEQUENCE_NO_IN_TRX = 10411
+ER_RPL_CHANNELS_REQUIRE_TABLES_AS_INFO_REPOSITORIES = 10412
+ER_RPL_CHANNELS_REQUIRE_NON_ZERO_SERVER_ID = 10413
+ER_RPL_REPO_SHOULD_BE_TABLE = 10414
+ER_RPL_ERROR_CREATING_MASTER_INFO = 10415
+ER_RPL_ERROR_CHANGING_MASTER_INFO_REPO_TYPE = 10416
+ER_RPL_CHANGING_RELAY_LOG_INFO_REPO_TYPE_FAILED_DUE_TO_GAPS = 10417
+ER_RPL_ERROR_CREATING_RELAY_LOG_INFO = 10418
+ER_RPL_ERROR_CHANGING_RELAY_LOG_INFO_REPO_TYPE = 10419
+ER_RPL_FAILED_TO_DELETE_FROM_SLAVE_WORKERS_INFO_REPOSITORY = 10420
+ER_RPL_FAILED_TO_RESET_STATE_IN_SLAVE_INFO_REPOSITORY = 10421
+ER_RPL_ERROR_CHECKING_REPOSITORY = 10422
+ER_RPL_SLAVE_GENERIC_MESSAGE = 10423
+ER_RPL_SLAVE_COULD_NOT_CREATE_CHANNEL_LIST = 10424
+ER_RPL_MULTISOURCE_REQUIRES_TABLE_TYPE_REPOSITORIES = 10425
+ER_RPL_SLAVE_FAILED_TO_INIT_A_MASTER_INFO_STRUCTURE = 10426
+ER_RPL_SLAVE_FAILED_TO_INIT_MASTER_INFO_STRUCTURE = 10427
+ER_RPL_SLAVE_FAILED_TO_CREATE_CHANNEL_FROM_MASTER_INFO = 10428
+ER_RPL_FAILED_TO_CREATE_NEW_INFO_FILE = 10429
+ER_RPL_FAILED_TO_CREATE_CACHE_FOR_INFO_FILE = 10430
+ER_RPL_FAILED_TO_OPEN_INFO_FILE = 10431
+ER_RPL_GTID_MEMORY_FINALLY_AVAILABLE = 10432
+ER_SERVER_COST_UNKNOWN_COST_CONSTANT = 10433
+ER_SERVER_COST_INVALID_COST_CONSTANT = 10434
+ER_ENGINE_COST_UNKNOWN_COST_CONSTANT = 10435
+ER_ENGINE_COST_UNKNOWN_STORAGE_ENGINE = 10436
+ER_ENGINE_COST_INVALID_DEVICE_TYPE_FOR_SE = 10437
+ER_ENGINE_COST_INVALID_CONST_CONSTANT_FOR_SE_AND_DEVICE = 10438
+ER_SERVER_COST_FAILED_TO_READ = 10439
+ER_ENGINE_COST_FAILED_TO_READ = 10440
+ER_FAILED_TO_OPEN_COST_CONSTANT_TABLES = 10441
+ER_RPL_UNSUPPORTED_UNIGNORABLE_EVENT_IN_STREAM = 10442
+ER_RPL_GTID_LOG_EVENT_IN_STREAM = 10443
+ER_RPL_UNEXPECTED_BEGIN_IN_STREAM = 10444
+ER_RPL_UNEXPECTED_COMMIT_ROLLBACK_OR_XID_LOG_EVENT_IN_STREAM = 10445
+ER_RPL_UNEXPECTED_XA_ROLLBACK_IN_STREAM = 10446
+ER_EVENT_EXECUTION_FAILED_CANT_AUTHENTICATE_USER = 10447
+ER_EVENT_EXECUTION_FAILED_USER_LOST_EVEN_PRIVILEGE = 10448
+ER_EVENT_ERROR_DURING_COMPILATION = 10449
+ER_EVENT_DROPPING = 10450
+ER_NDB_SCHEMA_GENERIC_MESSAGE = 10451
+ER_RPL_INCOMPATIBLE_DECIMAL_IN_RBR = 10452
+ER_INIT_ROOT_WITHOUT_PASSWORD = 10453
+ER_INIT_GENERATING_TEMP_PASSWORD_FOR_ROOT = 10454
+ER_INIT_CANT_OPEN_BOOTSTRAP_FILE = 10455
+ER_INIT_BOOTSTRAP_COMPLETE = 10456
+ER_INIT_DATADIR_NOT_EMPTY_WONT_INITIALIZE = 10457
+ER_INIT_DATADIR_EXISTS_WONT_INITIALIZE = 10458
+ER_INIT_DATADIR_EXISTS_AND_PATH_TOO_LONG_WONT_INITIALIZE = 10459
+ER_INIT_DATADIR_EXISTS_AND_NOT_WRITABLE_WONT_INITIALIZE = 10460
+ER_INIT_CREATING_DD = 10461
+ER_RPL_BINLOG_STARTING_DUMP = 10462
+ER_RPL_BINLOG_MASTER_SENDS_HEARTBEAT = 10463
+ER_RPL_BINLOG_SKIPPING_REMAINING_HEARTBEAT_INFO = 10464
+ER_RPL_BINLOG_MASTER_USES_CHECKSUM_AND_SLAVE_CANT = 10465
+ER_NDB_QUERY_FAILED = 10466
+ER_KILLING_THREAD = 10467
+ER_DETACHING_SESSION_LEFT_BY_PLUGIN = 10468
+ER_CANT_DETACH_SESSION_LEFT_BY_PLUGIN = 10469
+ER_DETACHED_SESSIONS_LEFT_BY_PLUGIN = 10470
+ER_FAILED_TO_DECREMENT_NUMBER_OF_THREADS = 10471
+ER_PLUGIN_DID_NOT_DEINITIALIZE_THREADS = 10472
+ER_KILLED_THREADS_OF_PLUGIN = 10473
+ER_NDB_SLAVE_MAX_REPLICATED_EPOCH_UNKNOWN = 10474
+ER_NDB_SLAVE_MAX_REPLICATED_EPOCH_SET_TO = 10475
+ER_NDB_NODE_ID_AND_MANAGEMENT_SERVER_INFO = 10476
+ER_NDB_DISCONNECT_INFO = 10477
+ER_NDB_COLUMN_DEFAULTS_DIFFER = 10478
+ER_NDB_COLUMN_SHOULD_NOT_HAVE_NATIVE_DEFAULT = 10479
+ER_NDB_FIELD_INFO = 10480
+ER_NDB_COLUMN_INFO = 10481
+ER_NDB_OOM_IN_FIX_UNIQUE_INDEX_ATTR_ORDER = 10482
+ER_NDB_SLAVE_MALFORMED_EVENT_RECEIVED_ON_TABLE = 10483
+ER_NDB_SLAVE_CONFLICT_FUNCTION_REQUIRES_ROLE = 10484
+ER_NDB_SLAVE_CONFLICT_DETECTION_REQUIRES_TRANSACTION_IDS = 10485
+ER_NDB_SLAVE_BINLOG_MISSING_INFO_FOR_CONFLICT_DETECTION = 10486
+ER_NDB_ERROR_IN_READAUTOINCREMENTVALUE = 10487
+ER_NDB_FOUND_UNCOMMITTED_AUTOCOMMIT = 10488
+ER_NDB_SLAVE_TOO_MANY_RETRIES = 10489
+ER_NDB_SLAVE_ERROR_IN_UPDATE_CREATE_INFO = 10490
+ER_NDB_SLAVE_CANT_ALLOCATE_TABLE_SHARE = 10491
+ER_NDB_BINLOG_ERROR_INFO_FROM_DA = 10492
+ER_NDB_BINLOG_CREATE_TABLE_EVENT = 10493
+ER_NDB_BINLOG_FAILED_CREATE_TABLE_EVENT_OPERATIONS = 10494
+ER_NDB_BINLOG_RENAME_EVENT = 10495
+ER_NDB_BINLOG_FAILED_CREATE_EVENT_OPERATIONS_DURING_RENAME = 10496
+ER_NDB_UNEXPECTED_RENAME_TYPE = 10497
+ER_NDB_ERROR_IN_GET_AUTO_INCREMENT = 10498
+ER_NDB_CREATING_SHARE_IN_OPEN = 10499
+ER_NDB_TABLE_OPENED_READ_ONLY = 10500
+ER_NDB_INITIALIZE_GIVEN_CLUSTER_PLUGIN_DISABLED = 10501
+ER_NDB_BINLOG_FORMAT_CHANGED_FROM_STMT_TO_MIXED = 10502
+ER_NDB_TRAILING_SHARE_RELEASED_BY_CLOSE_CACHED_TABLES = 10503
+ER_NDB_SHARE_ALREADY_EXISTS = 10504
+ER_NDB_HANDLE_TRAILING_SHARE_INFO = 10505
+ER_NDB_CLUSTER_GET_SHARE_INFO = 10506
+ER_NDB_CLUSTER_REAL_FREE_SHARE_INFO = 10507
+ER_NDB_CLUSTER_REAL_FREE_SHARE_DROP_FAILED = 10508
+ER_NDB_CLUSTER_FREE_SHARE_INFO = 10509
+ER_NDB_CLUSTER_MARK_SHARE_DROPPED_INFO = 10510
+ER_NDB_CLUSTER_MARK_SHARE_DROPPED_DESTROYING_SHARE = 10511
+ER_NDB_CLUSTER_OOM_THD_NDB = 10512
+ER_NDB_BINLOG_NDB_TABLES_INITIALLY_READ_ONLY = 10513
+ER_NDB_UTIL_THREAD_OOM = 10514
+ER_NDB_ILLEGAL_VALUE_FOR_NDB_RECV_THREAD_CPU_MASK = 10515
+ER_NDB_TOO_MANY_CPUS_IN_NDB_RECV_THREAD_CPU_MASK = 10516
+ER_DBUG_CHECK_SHARES_OPEN = 10517
+ER_DBUG_CHECK_SHARES_INFO = 10518
+ER_DBUG_CHECK_SHARES_DROPPED = 10519
+ER_INVALID_OR_OLD_TABLE_OR_DB_NAME = 10520
+ER_TC_RECOVERING_AFTER_CRASH_USING = 10521
+ER_TC_CANT_AUTO_RECOVER_WITH_TC_HEURISTIC_RECOVER = 10522
+ER_TC_BAD_MAGIC_IN_TC_LOG = 10523
+ER_TC_NEED_N_SE_SUPPORTING_2PC_FOR_RECOVERY = 10524
+ER_TC_RECOVERY_FAILED_THESE_ARE_YOUR_OPTIONS = 10525
+ER_TC_HEURISTIC_RECOVERY_MODE = 10526
+ER_TC_HEURISTIC_RECOVERY_FAILED = 10527
+ER_TC_RESTART_WITHOUT_TC_HEURISTIC_RECOVER = 10528
+ER_RPL_SLAVE_FAILED_TO_CREATE_OR_RECOVER_INFO_REPOSITORIES = 10529
+ER_RPL_SLAVE_AUTO_POSITION_IS_1_AND_GTID_MODE_IS_OFF = 10530
+ER_RPL_SLAVE_CANT_START_SLAVE_FOR_CHANNEL = 10531
+ER_RPL_SLAVE_CANT_STOP_SLAVE_FOR_CHANNEL = 10532
+ER_RPL_RECOVERY_NO_ROTATE_EVENT_FROM_MASTER = 10533
+ER_RPL_RECOVERY_ERROR_READ_RELAY_LOG = 10534
+ER_RPL_RECOVERY_ERROR_FREEING_IO_CACHE = 10535
+ER_RPL_RECOVERY_SKIPPED_GROUP_REPLICATION_CHANNEL = 10536
+ER_RPL_RECOVERY_ERROR = 10537
+ER_RPL_RECOVERY_IO_ERROR_READING_RELAY_LOG_INDEX = 10538
+ER_RPL_RECOVERY_FILE_MASTER_POS_INFO = 10539
+ER_RPL_RECOVERY_REPLICATE_SAME_SERVER_ID_REQUIRES_POSITION = 10540
+ER_RPL_MTS_RECOVERY_STARTING_COORDINATOR = 10541
+ER_RPL_MTS_RECOVERY_FAILED_TO_START_COORDINATOR = 10542
+ER_RPL_MTS_AUTOMATIC_RECOVERY_FAILED = 10543
+ER_RPL_MTS_RECOVERY_CANT_OPEN_RELAY_LOG = 10544
+ER_RPL_MTS_RECOVERY_SUCCESSFUL = 10545
+ER_RPL_SERVER_ID_MISSING = 10546
+ER_RPL_CANT_CREATE_SLAVE_THREAD = 10547
+ER_RPL_SLAVE_IO_THREAD_WAS_KILLED = 10548
+ER_RPL_SLAVE_MASTER_UUID_HAS_CHANGED = 10549
+ER_RPL_SLAVE_USES_CHECKSUM_AND_MASTER_PRE_50 = 10550
+ER_RPL_SLAVE_SECONDS_BEHIND_MASTER_DUBIOUS = 10551
+ER_RPL_SLAVE_CANT_FLUSH_MASTER_INFO_FILE = 10552
+ER_RPL_SLAVE_REPORT_HOST_TOO_LONG = 10553
+ER_RPL_SLAVE_REPORT_USER_TOO_LONG = 10554
+ER_RPL_SLAVE_REPORT_PASSWORD_TOO_LONG = 10555
+ER_RPL_SLAVE_ERROR_RETRYING = 10556
+ER_RPL_SLAVE_ERROR_READING_FROM_SERVER = 10557
+ER_RPL_SLAVE_DUMP_THREAD_KILLED_BY_MASTER = 10558
+ER_RPL_MTS_STATISTICS = 10559
+ER_RPL_MTS_RECOVERY_COMPLETE = 10560
+ER_RPL_SLAVE_CANT_INIT_RELAY_LOG_POSITION = 10561
+ER_RPL_SLAVE_CONNECTED_TO_MASTER_REPLICATION_STARTED = 10562
+ER_RPL_SLAVE_IO_THREAD_KILLED = 10563
+ER_RPL_SLAVE_IO_THREAD_CANT_REGISTER_ON_MASTER = 10564
+ER_RPL_SLAVE_FORCING_TO_RECONNECT_IO_THREAD = 10565
+ER_RPL_SLAVE_ERROR_REQUESTING_BINLOG_DUMP = 10566
+ER_RPL_LOG_ENTRY_EXCEEDS_SLAVE_MAX_ALLOWED_PACKET = 10567
+ER_RPL_SLAVE_STOPPING_AS_MASTER_OOM = 10568
+ER_RPL_SLAVE_IO_THREAD_ABORTED_WAITING_FOR_RELAY_LOG_SPACE = 10569
+ER_RPL_SLAVE_IO_THREAD_EXITING = 10570
+ER_RPL_SLAVE_CANT_INITIALIZE_SLAVE_WORKER = 10571
+ER_RPL_MTS_GROUP_RECOVERY_RELAY_LOG_INFO_FOR_WORKER = 10572
+ER_RPL_ERROR_LOOKING_FOR_LOG = 10573
+ER_RPL_MTS_GROUP_RECOVERY_RELAY_LOG_INFO = 10574
+ER_RPL_CANT_FIND_FOLLOWUP_FILE = 10575
+ER_RPL_MTS_CHECKPOINT_PERIOD_DIFFERS_FROM_CNT = 10576
+ER_RPL_SLAVE_WORKER_THREAD_CREATION_FAILED = 10577
+ER_RPL_SLAVE_WORKER_THREAD_CREATION_FAILED_WITH_ERRNO = 10578
+ER_RPL_SLAVE_FAILED_TO_INIT_PARTITIONS_HASH = 10579
+ER_RPL_SLAVE_NDB_TABLES_NOT_AVAILABLE = 10580
+ER_RPL_SLAVE_SQL_THREAD_STARTING = 10581
+ER_RPL_SLAVE_SKIP_COUNTER_EXECUTED = 10582
+ER_RPL_SLAVE_ADDITIONAL_ERROR_INFO_FROM_DA = 10583
+ER_RPL_SLAVE_ERROR_INFO_FROM_DA = 10584
+ER_RPL_SLAVE_ERROR_LOADING_USER_DEFINED_LIBRARY = 10585
+ER_RPL_SLAVE_ERROR_RUNNING_QUERY = 10586
+ER_RPL_SLAVE_SQL_THREAD_EXITING = 10587
+ER_RPL_SLAVE_READ_INVALID_EVENT_FROM_MASTER = 10588
+ER_RPL_SLAVE_QUEUE_EVENT_FAILED_INVALID_CONFIGURATION = 10589
+ER_RPL_SLAVE_IO_THREAD_DETECTED_UNEXPECTED_EVENT_SEQUENCE = 10590
+ER_RPL_SLAVE_CANT_USE_CHARSET = 10591
+ER_RPL_SLAVE_CONNECTED_TO_MASTER_REPLICATION_RESUMED = 10592
+ER_RPL_SLAVE_NEXT_LOG_IS_ACTIVE = 10593
+ER_RPL_SLAVE_NEXT_LOG_IS_INACTIVE = 10594
+ER_RPL_SLAVE_SQL_THREAD_IO_ERROR_READING_EVENT = 10595
+ER_RPL_SLAVE_ERROR_READING_RELAY_LOG_EVENTS = 10596
+ER_SLAVE_CHANGE_MASTER_TO_EXECUTED = 10597
+ER_RPL_SLAVE_NEW_MASTER_INFO_NEEDS_REPOS_TYPE_OTHER_THAN_FILE = 10598
+ER_RPL_FAILED_TO_STAT_LOG_IN_INDEX = 10599
+ER_RPL_LOG_NOT_FOUND_WHILE_COUNTING_RELAY_LOG_SPACE = 10600
+ER_SLAVE_CANT_USE_TEMPDIR = 10601
+ER_RPL_RELAY_LOG_NEEDS_FILE_NOT_DIRECTORY = 10602
+ER_RPL_RELAY_LOG_INDEX_NEEDS_FILE_NOT_DIRECTORY = 10603
+ER_RPL_PLEASE_USE_OPTION_RELAY_LOG = 10604
+ER_RPL_OPEN_INDEX_FILE_FAILED = 10605
+ER_RPL_CANT_INITIALIZE_GTID_SETS_IN_RLI_INIT_INFO = 10606
+ER_RPL_CANT_OPEN_LOG_IN_RLI_INIT_INFO = 10607
+ER_RPL_ERROR_WRITING_RELAY_LOG_CONFIGURATION = 10608
+ER_NDB_OOM_GET_NDB_BLOBS_VALUE = 10609
+ER_NDB_THREAD_TIMED_OUT = 10610
+ER_NDB_TABLE_IS_NOT_DISTRIBUTED = 10611
+ER_NDB_CREATING_TABLE = 10612
+ER_NDB_FLUSHING_TABLE_INFO = 10613
+ER_NDB_CLEANING_STRAY_TABLES = 10614
+ER_NDB_DISCOVERED_MISSING_DB = 10615
+ER_NDB_DISCOVERED_REMAINING_DB = 10616
+ER_NDB_CLUSTER_FIND_ALL_DBS_RETRY = 10617
+ER_NDB_CLUSTER_FIND_ALL_DBS_FAIL = 10618
+ER_NDB_SKIPPING_SETUP_TABLE = 10619
+ER_NDB_FAILED_TO_SET_UP_TABLE = 10620
+ER_NDB_MISSING_FRM_DISCOVERING = 10621
+ER_NDB_MISMATCH_IN_FRM_DISCOVERING = 10622
+ER_NDB_BINLOG_CLEANING_UP_SETUP_LEFTOVERS = 10623
+ER_NDB_WAITING_INFO = 10624
+ER_NDB_WAITING_INFO_WITH_MAP = 10625
+ER_NDB_TIMEOUT_WHILE_DISTRIBUTING = 10626
+ER_NDB_NOT_WAITING_FOR_DISTRIBUTING = 10627
+ER_NDB_DISTRIBUTED_INFO = 10628
+ER_NDB_DISTRIBUTION_COMPLETE = 10629
+ER_NDB_SCHEMA_DISTRIBUTION_FAILED = 10630
+ER_NDB_SCHEMA_DISTRIBUTION_REPORTS_SUBSCRIBE = 10631
+ER_NDB_SCHEMA_DISTRIBUTION_REPORTS_UNSUBSCRIBE = 10632
+ER_NDB_BINLOG_CANT_DISCOVER_TABLE_FROM_SCHEMA_EVENT = 10633
+ER_NDB_BINLOG_SIGNALLING_UNKNOWN_VALUE = 10634
+ER_NDB_BINLOG_REPLY_TO = 10635
+ER_NDB_BINLOG_CANT_RELEASE_SLOCK = 10636
+ER_NDB_CANT_FIND_TABLE = 10637
+ER_NDB_DISCARDING_EVENT_NO_OBJ = 10638
+ER_NDB_DISCARDING_EVENT_ID_VERSION_MISMATCH = 10639
+ER_NDB_CLEAR_SLOCK_INFO = 10640
+ER_NDB_BINLOG_SKIPPING_LOCAL_TABLE = 10641
+ER_NDB_BINLOG_ONLINE_ALTER_RENAME = 10642
+ER_NDB_BINLOG_CANT_REOPEN_SHADOW_TABLE = 10643
+ER_NDB_BINLOG_ONLINE_ALTER_RENAME_COMPLETE = 10644
+ER_NDB_BINLOG_SKIPPING_DROP_OF_LOCAL_TABLE = 10645
+ER_NDB_BINLOG_SKIPPING_RENAME_OF_LOCAL_TABLE = 10646
+ER_NDB_BINLOG_SKIPPING_DROP_OF_DB_CONTAINING_LOCAL_TABLES = 10647
+ER_NDB_BINLOG_GOT_DIST_PRIV_EVENT_FLUSHING_PRIVILEGES = 10648
+ER_NDB_BINLOG_GOT_SCHEMA_EVENT = 10649
+ER_NDB_BINLOG_SKIPPING_OLD_SCHEMA_OPERATION = 10650
+ER_NDB_CLUSTER_FAILURE = 10651
+ER_NDB_TABLES_INITIALLY_READ_ONLY_ON_RECONNECT = 10652
+ER_NDB_IGNORING_UNKNOWN_EVENT = 10653
+ER_NDB_BINLOG_OPENING_INDEX = 10654
+ER_NDB_BINLOG_CANT_LOCK_NDB_BINLOG_INDEX = 10655
+ER_NDB_BINLOG_INJECTING_RANDOM_WRITE_FAILURE = 10656
+ER_NDB_BINLOG_CANT_WRITE_TO_NDB_BINLOG_INDEX = 10657
+ER_NDB_BINLOG_WRITING_TO_NDB_BINLOG_INDEX = 10658
+ER_NDB_BINLOG_CANT_COMMIT_TO_NDB_BINLOG_INDEX = 10659
+ER_NDB_BINLOG_WRITE_TO_NDB_BINLOG_INDEX_FAILED_AFTER_KILL = 10660
+ER_NDB_BINLOG_USING_SERVER_ID_0_SLAVES_WILL_NOT = 10661
+ER_NDB_SERVER_ID_RESERVED_OR_TOO_LARGE = 10662
+ER_NDB_BINLOG_NDB_LOG_TRANSACTION_ID_REQUIRES_V2_ROW_EVENTS = 10663
+ER_NDB_BINLOG_NDB_LOG_APPLY_STATUS_FORCING_FULL_USE_WRITE = 10664
+ER_NDB_BINLOG_GENERIC_MESSAGE = 10665
+ER_NDB_CONFLICT_GENERIC_MESSAGE = 10666
+ER_NDB_TRANS_DEPENDENCY_TRACKER_ERROR = 10667
+ER_NDB_CONFLICT_FN_PARSE_ERROR = 10668
+ER_NDB_CONFLICT_FN_SETUP_ERROR = 10669
+ER_NDB_BINLOG_FAILED_TO_GET_TABLE = 10670
+ER_NDB_BINLOG_NOT_LOGGING = 10671
+ER_NDB_BINLOG_CREATE_TABLE_EVENT_FAILED = 10672
+ER_NDB_BINLOG_CREATE_TABLE_EVENT_INFO = 10673
+ER_NDB_BINLOG_DISCOVER_TABLE_EVENT_INFO = 10674
+ER_NDB_BINLOG_BLOB_REQUIRES_PK = 10675
+ER_NDB_BINLOG_CANT_CREATE_EVENT_IN_DB = 10676
+ER_NDB_BINLOG_CANT_CREATE_EVENT_IN_DB_AND_CANT_DROP = 10677
+ER_NDB_BINLOG_CANT_CREATE_EVENT_IN_DB_DROPPED = 10678
+ER_NDB_BINLOG_DISCOVER_REUSING_OLD_EVENT_OPS = 10679
+ER_NDB_BINLOG_CREATING_NDBEVENTOPERATION_FAILED = 10680
+ER_NDB_BINLOG_CANT_CREATE_BLOB = 10681
+ER_NDB_BINLOG_NDBEVENT_EXECUTE_FAILED = 10682
+ER_NDB_CREATE_EVENT_OPS_LOGGING_INFO = 10683
+ER_NDB_BINLOG_CANT_DROP_EVENT_FROM_DB = 10684
+ER_NDB_TIMED_OUT_IN_DROP_TABLE = 10685
+ER_NDB_BINLOG_UNHANDLED_ERROR_FOR_TABLE = 10686
+ER_NDB_BINLOG_CLUSTER_FAILURE = 10687
+ER_NDB_BINLOG_UNKNOWN_NON_DATA_EVENT = 10688
+ER_NDB_BINLOG_INJECTOR_DISCARDING_ROW_EVENT_METADATA = 10689
+ER_NDB_REMAINING_OPEN_TABLES = 10690
+ER_NDB_REMAINING_OPEN_TABLE_INFO = 10691
+ER_NDB_COULD_NOT_GET_APPLY_STATUS_SHARE = 10692
+ER_NDB_BINLOG_SERVER_SHUTDOWN_DURING_NDB_CLUSTER_START = 10693
+ER_NDB_BINLOG_CLUSTER_RESTARTED_RESET_MASTER_SUGGESTED = 10694
+ER_NDB_BINLOG_CLUSTER_HAS_RECONNECTED = 10695
+ER_NDB_BINLOG_STARTING_LOG_AT_EPOCH = 10696
+ER_NDB_BINLOG_NDB_TABLES_WRITABLE = 10697
+ER_NDB_BINLOG_SHUTDOWN_DETECTED = 10698
+ER_NDB_BINLOG_LOST_SCHEMA_CONNECTION_WAITING = 10699
+ER_NDB_BINLOG_LOST_SCHEMA_CONNECTION_CONTINUING = 10700
+ER_NDB_BINLOG_ERROR_HANDLING_SCHEMA_EVENT = 10701
+ER_NDB_BINLOG_CANT_INJECT_APPLY_STATUS_WRITE_ROW = 10702
+ER_NDB_BINLOG_ERROR_DURING_GCI_ROLLBACK = 10703
+ER_NDB_BINLOG_ERROR_DURING_GCI_COMMIT = 10704
+ER_NDB_BINLOG_LATEST_TRX_IN_EPOCH_NOT_IN_BINLOG = 10705
+ER_NDB_BINLOG_RELEASING_EXTRA_SHARE_REFERENCES = 10706
+ER_NDB_BINLOG_REMAINING_OPEN_TABLES = 10707
+ER_NDB_BINLOG_REMAINING_OPEN_TABLE_INFO = 10708
+ER_TREE_CORRUPT_PARENT_SHOULD_POINT_AT_PARENT = 10709
+ER_TREE_CORRUPT_ROOT_SHOULD_BE_BLACK = 10710
+ER_TREE_CORRUPT_2_CONSECUTIVE_REDS = 10711
+ER_TREE_CORRUPT_RIGHT_IS_LEFT = 10712
+ER_TREE_CORRUPT_INCORRECT_BLACK_COUNT = 10713
+ER_WRONG_COUNT_FOR_ORIGIN = 10714
+ER_WRONG_COUNT_FOR_KEY = 10715
+ER_WRONG_COUNT_OF_ELEMENTS = 10716
+ER_RPL_ERROR_READING_SLAVE_WORKER_CONFIGURATION = 10717
+ER_RPL_ERROR_WRITING_SLAVE_WORKER_CONFIGURATION = 10718
+ER_RPL_FAILED_TO_OPEN_RELAY_LOG = 10719
+ER_RPL_WORKER_CANT_READ_RELAY_LOG = 10720
+ER_RPL_WORKER_CANT_FIND_NEXT_RELAY_LOG = 10721
+ER_RPL_MTS_SLAVE_COORDINATOR_HAS_WAITED = 10722
+ER_BINLOG_FAILED_TO_WRITE_DROP_FOR_TEMP_TABLES = 10723
+ER_BINLOG_OOM_WRITING_DELETE_WHILE_OPENING_HEAP_TABLE = 10724
+ER_FAILED_TO_REPAIR_TABLE = 10725
+ER_FAILED_TO_REMOVE_TEMP_TABLE = 10726
+ER_SYSTEM_TABLE_NOT_TRANSACTIONAL = 10727
+ER_RPL_ERROR_WRITING_MASTER_CONFIGURATION = 10728
+ER_RPL_ERROR_READING_MASTER_CONFIGURATION = 10729
+ER_RPL_SSL_INFO_IN_MASTER_INFO_IGNORED = 10730
+ER_PLUGIN_FAILED_DEINITIALIZATION = 10731
+ER_PLUGIN_HAS_NONZERO_REFCOUNT_AFTER_DEINITIALIZATION = 10732
+ER_PLUGIN_SHUTTING_DOWN_PLUGIN = 10733
+ER_PLUGIN_REGISTRATION_FAILED = 10734
+ER_PLUGIN_CANT_OPEN_PLUGIN_TABLE = 10735
+ER_PLUGIN_CANT_LOAD = 10736
+ER_PLUGIN_LOAD_PARAMETER_TOO_LONG = 10737
+ER_PLUGIN_FORCING_SHUTDOWN = 10738
+ER_PLUGIN_HAS_NONZERO_REFCOUNT_AFTER_SHUTDOWN = 10739
+ER_PLUGIN_UNKNOWN_VARIABLE_TYPE = 10740
+ER_PLUGIN_VARIABLE_SET_READ_ONLY = 10741
+ER_PLUGIN_VARIABLE_MISSING_NAME = 10742
+ER_PLUGIN_VARIABLE_NOT_ALLOCATED_THREAD_LOCAL = 10743
+ER_PLUGIN_OOM = 10744
+ER_PLUGIN_BAD_OPTIONS = 10745
+ER_PLUGIN_PARSING_OPTIONS_FAILED = 10746
+ER_PLUGIN_DISABLED = 10747
+ER_PLUGIN_HAS_CONFLICTING_SYSTEM_VARIABLES = 10748
+ER_PLUGIN_CANT_SET_PERSISTENT_OPTIONS = 10749
+ER_MY_NET_WRITE_FAILED_FALLING_BACK_ON_STDERR = 10750
+ER_RETRYING_REPAIR_WITHOUT_QUICK = 10751
+ER_RETRYING_REPAIR_WITH_KEYCACHE = 10752
+ER_FOUND_ROWS_WHILE_REPAIRING = 10753
+ER_ERROR_DURING_OPTIMIZE_TABLE = 10754
+ER_ERROR_ENABLING_KEYS = 10755
+ER_CHECKING_TABLE = 10756
+ER_RECOVERING_TABLE = 10757
+ER_CANT_CREATE_TABLE_SHARE_FROM_FRM = 10758
+ER_CANT_LOCK_TABLE = 10759
+ER_CANT_ALLOC_TABLE_OBJECT = 10760
+ER_CANT_CREATE_HANDLER_OBJECT_FOR_TABLE = 10761
+ER_CANT_SET_HANDLER_REFERENCE_FOR_TABLE = 10762
+ER_CANT_LOCK_TABLESPACE = 10763
+ER_CANT_UPGRADE_GENERATED_COLUMNS_TO_DD = 10764
+ER_DD_ERROR_CREATING_ENTRY = 10765
+ER_DD_CANT_FETCH_TABLE_DATA = 10766
+ER_DD_CANT_FIX_SE_DATA = 10767
+ER_DD_CANT_CREATE_SP = 10768
+ER_CANT_OPEN_DB_OPT_USING_DEFAULT_CHARSET = 10769
+ER_CANT_CREATE_CACHE_FOR_DB_OPT = 10770
+ER_CANT_IDENTIFY_CHARSET_USING_DEFAULT = 10771
+ER_DB_OPT_NOT_FOUND_USING_DEFAULT_CHARSET = 10772
+ER_EVENT_CANT_GET_TIMEZONE_FROM_FIELD = 10773
+ER_EVENT_CANT_FIND_TIMEZONE = 10774
+ER_EVENT_CANT_GET_CHARSET = 10775
+ER_EVENT_CANT_GET_COLLATION = 10776
+ER_EVENT_CANT_OPEN_TABLE_MYSQL_EVENT = 10777
+ER_CANT_PARSE_STORED_ROUTINE_BODY = 10778
+ER_CANT_OPEN_TABLE_MYSQL_PROC = 10779
+ER_CANT_READ_TABLE_MYSQL_PROC = 10780
+ER_FILE_EXISTS_DURING_UPGRADE = 10781
+ER_CANT_OPEN_DATADIR_AFTER_UPGRADE_FAILURE = 10782
+ER_CANT_SET_PATH_FOR = 10783
+ER_CANT_OPEN_DIR = 10784
+ER_NDB_EMPTY_NODEID_IN_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10785
+ER_NDB_CANT_PARSE_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10786
+ER_NDB_INVALID_NODEID_IN_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10787
+ER_NDB_DUPLICATE_NODEID_IN_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10788
+ER_NDB_POOL_SIZE_MUST_MATCH_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10789
+ER_NDB_NODEID_NOT_FIRST_IN_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10790
+ER_NDB_USING_NODEID = 10791
+ER_NDB_CANT_ALLOC_GLOBAL_NDB_CLUSTER_CONNECTION = 10792
+ER_NDB_CANT_ALLOC_GLOBAL_NDB_OBJECT = 10793
+ER_NDB_USING_NODEID_LIST = 10794
+ER_NDB_CANT_ALLOC_NDB_CLUSTER_CONNECTION = 10795
+ER_NDB_STARTING_CONNECT_THREAD = 10796
+ER_NDB_NODE_INFO = 10797
+ER_NDB_CANT_START_CONNECT_THREAD = 10798
+ER_NDB_GENERIC_ERROR = 10799
+ER_NDB_CPU_MASK_TOO_SHORT = 10800
+ER_EVENT_ERROR_CREATING_QUERY_TO_WRITE_TO_BINLOG = 10801
+ER_EVENT_SCHEDULER_ERROR_LOADING_FROM_DB = 10802
+ER_EVENT_SCHEDULER_ERROR_GETTING_EVENT_OBJECT = 10803
+ER_EVENT_SCHEDULER_GOT_BAD_DATA_FROM_TABLE = 10804
+ER_EVENT_CANT_GET_LOCK_FOR_DROPPING_EVENT = 10805
+ER_EVENT_UNABLE_TO_DROP_EVENT = 10806
+ER_BINLOG_ATTACHING_THREAD_MEMORY_FINALLY_AVAILABLE = 10807
+ER_BINLOG_CANT_RESIZE_CACHE = 10808
+ER_BINLOG_FILE_BEING_READ_NOT_PURGED = 10809
+ER_BINLOG_IO_ERROR_READING_HEADER = 10810
+ER_BINLOG_CANT_OPEN_LOG = 10811
+ER_BINLOG_CANT_CREATE_CACHE_FOR_LOG = 10812
+ER_BINLOG_FILE_EXTENSION_NUMBER_EXHAUSTED = 10813
+ER_BINLOG_FILE_NAME_TOO_LONG = 10814
+ER_BINLOG_FILE_EXTENSION_NUMBER_RUNNING_LOW = 10815
+ER_BINLOG_CANT_OPEN_FOR_LOGGING = 10816
+ER_BINLOG_FAILED_TO_SYNC_INDEX_FILE = 10817
+ER_BINLOG_ERROR_READING_GTIDS_FROM_RELAY_LOG = 10818
+ER_BINLOG_EVENTS_READ_FROM_RELAY_LOG_INFO = 10819
+ER_BINLOG_ERROR_READING_GTIDS_FROM_BINARY_LOG = 10820
+ER_BINLOG_EVENTS_READ_FROM_BINLOG_INFO = 10821
+ER_BINLOG_CANT_GENERATE_NEW_FILE_NAME = 10822
+ER_BINLOG_FAILED_TO_SYNC_INDEX_FILE_IN_OPEN = 10823
+ER_BINLOG_CANT_USE_FOR_LOGGING = 10824
+ER_BINLOG_FAILED_TO_CLOSE_INDEX_FILE_WHILE_REBUILDING = 10825
+ER_BINLOG_FAILED_TO_DELETE_INDEX_FILE_WHILE_REBUILDING = 10826
+ER_BINLOG_FAILED_TO_RENAME_INDEX_FILE_WHILE_REBUILDING = 10827
+ER_BINLOG_FAILED_TO_OPEN_INDEX_FILE_AFTER_REBUILDING = 10828
+ER_BINLOG_CANT_APPEND_LOG_TO_TMP_INDEX = 10829
+ER_BINLOG_CANT_LOCATE_OLD_BINLOG_OR_RELAY_LOG_FILES = 10830
+ER_BINLOG_CANT_DELETE_FILE = 10831
+ER_BINLOG_CANT_SET_TMP_INDEX_NAME = 10832
+ER_BINLOG_FAILED_TO_OPEN_TEMPORARY_INDEX_FILE = 10833
+ER_BINLOG_ERROR_GETTING_NEXT_LOG_FROM_INDEX = 10834
+ER_BINLOG_CANT_OPEN_TMP_INDEX = 10835
+ER_BINLOG_CANT_COPY_INDEX_TO_TMP = 10836
+ER_BINLOG_CANT_CLOSE_TMP_INDEX = 10837
+ER_BINLOG_CANT_MOVE_TMP_TO_INDEX = 10838
+ER_BINLOG_PURGE_LOGS_CALLED_WITH_FILE_NOT_IN_INDEX = 10839
+ER_BINLOG_PURGE_LOGS_CANT_SYNC_INDEX_FILE = 10840
+ER_BINLOG_PURGE_LOGS_CANT_COPY_TO_REGISTER_FILE = 10841
+ER_BINLOG_PURGE_LOGS_CANT_FLUSH_REGISTER_FILE = 10842
+ER_BINLOG_PURGE_LOGS_CANT_UPDATE_INDEX_FILE = 10843
+ER_BINLOG_PURGE_LOGS_FAILED_TO_PURGE_LOG = 10844
+ER_BINLOG_FAILED_TO_SET_PURGE_INDEX_FILE_NAME = 10845
+ER_BINLOG_FAILED_TO_OPEN_REGISTER_FILE = 10846
+ER_BINLOG_FAILED_TO_REINIT_REGISTER_FILE = 10847
+ER_BINLOG_FAILED_TO_READ_REGISTER_FILE = 10848
+ER_CANT_STAT_FILE = 10849
+ER_BINLOG_CANT_DELETE_LOG_FILE_DOES_INDEX_MATCH_FILES = 10850
+ER_BINLOG_CANT_DELETE_FILE_AND_READ_BINLOG_INDEX = 10851
+ER_BINLOG_FAILED_TO_DELETE_LOG_FILE = 10852
+ER_BINLOG_LOGGING_INCIDENT_TO_STOP_SLAVES = 10853
+ER_BINLOG_CANT_FIND_LOG_IN_INDEX = 10854
+ER_BINLOG_RECOVERING_AFTER_CRASH_USING = 10855
+ER_BINLOG_CANT_OPEN_CRASHED_BINLOG = 10856
+ER_BINLOG_CANT_TRIM_CRASHED_BINLOG = 10857
+ER_BINLOG_CRASHED_BINLOG_TRIMMED = 10858
+ER_BINLOG_CANT_CLEAR_IN_USE_FLAG_FOR_CRASHED_BINLOG = 10859
+ER_BINLOG_FAILED_TO_RUN_AFTER_SYNC_HOOK = 10860
+ER_TURNING_LOGGING_OFF_FOR_THE_DURATION = 10861
+ER_BINLOG_FAILED_TO_RUN_AFTER_FLUSH_HOOK = 10862
+ER_BINLOG_CRASH_RECOVERY_FAILED = 10863
+ER_BINLOG_WARNING_SUPPRESSED = 10864
+ER_NDB_LOG_ENTRY = 10865
+ER_NDB_LOG_ENTRY_WITH_PREFIX = 10866
+ER_NDB_BINLOG_CANT_CREATE_PURGE_THD = 10867
+ER_INNODB_UNKNOWN_COLLATION = 10868
+ER_INNODB_INVALID_LOG_GROUP_HOME_DIR = 10869
+ER_INNODB_INVALID_INNODB_UNDO_DIRECTORY = 10870
+ER_INNODB_ILLEGAL_COLON_IN_POOL = 10871
+ER_INNODB_INVALID_PAGE_SIZE = 10872
+ER_INNODB_DIRTY_WATER_MARK_NOT_LOW = 10873
+ER_INNODB_IO_CAPACITY_EXCEEDS_MAX = 10874
+ER_INNODB_FILES_SAME = 10875
+ER_INNODB_UNREGISTERED_TRX_ACTIVE = 10876
+ER_INNODB_CLOSING_CONNECTION_ROLLS_BACK = 10877
+ER_INNODB_TRX_XLATION_TABLE_OOM = 10878
+ER_INNODB_CANT_FIND_INDEX_IN_INNODB_DD = 10879
+ER_INNODB_INDEX_COLUMN_INFO_UNLIKE_MYSQLS = 10880
+ER_INNODB_CANT_OPEN_TABLE = 10881
+ER_INNODB_CANT_BUILD_INDEX_XLATION_TABLE_FOR = 10882
+ER_INNODB_PK_NOT_IN_MYSQL = 10883
+ER_INNODB_PK_ONLY_IN_MYSQL = 10884
+ER_INNODB_CLUSTERED_INDEX_PRIVATE = 10885
+ER_INNODB_PARTITION_TABLE_LOWERCASED = 10886
+ER_ERRMSG_REPLACEMENT_DODGY = 10887
+ER_ERRMSG_REPLACEMENTS_FAILED = 10888
+ER_NPIPE_CANT_CREATE = 10889
+ER_PARTITION_MOVE_CREATED_DUPLICATE_ROW_PLEASE_FIX = 10890
+ER_AUDIT_CANT_ABORT_COMMAND = 10891
+ER_AUDIT_CANT_ABORT_EVENT = 10892
+ER_AUDIT_WARNING = 10893
+ER_NDB_NUMBER_OF_CHANNELS = 10894
+ER_NDB_SLAVE_PARALLEL_WORKERS = 10895
+ER_NDB_DISTRIBUTING_ERR = 10896
+ER_RPL_SLAVE_INSECURE_CHANGE_MASTER = 10897
+ER_RPL_SLAVE_FLUSH_RELAY_LOGS_NOT_ALLOWED = 10898
+ER_RPL_SLAVE_INCORRECT_CHANNEL = 10899
+ER_FAILED_TO_FIND_DL_ENTRY = 10900
+ER_FAILED_TO_OPEN_SHARED_LIBRARY = 10901
+ER_THREAD_PRIORITY_IGNORED = 10902
+ER_BINLOG_CACHE_SIZE_TOO_LARGE = 10903
+ER_BINLOG_STMT_CACHE_SIZE_TOO_LARGE = 10904
+ER_FAILED_TO_GENERATE_UNIQUE_LOGFILE = 10905
+ER_FAILED_TO_READ_FILE = 10906
+ER_FAILED_TO_WRITE_TO_FILE = 10907
+ER_BINLOG_UNSAFE_MESSAGE_AND_STATEMENT = 10908
+ER_FORCE_CLOSE_THREAD = 10909
+ER_SERVER_SHUTDOWN_COMPLETE = 10910
+ER_RPL_CANT_HAVE_SAME_BASENAME = 10911
+ER_RPL_GTID_MODE_REQUIRES_ENFORCE_GTID_CONSISTENCY_ON = 10912
+ER_WARN_NO_SERVERID_SPECIFIED = 10913
+ER_ABORTING_USER_CONNECTION = 10914
+ER_SQL_MODE_MERGED_WITH_STRICT_MODE = 10915
+ER_GTID_PURGED_WAS_UPDATED = 10916
+ER_GTID_EXECUTED_WAS_UPDATED = 10917
+ER_DEPRECATE_MSG_WITH_REPLACEMENT = 10918
+ER_TRG_CREATION_CTX_NOT_SET = 10919
+ER_FILE_HAS_OLD_FORMAT = 10920
+ER_VIEW_CREATION_CTX_NOT_SET = 10921
+ER_TABLE_NAME_CAUSES_TOO_LONG_PATH = 10922
+ER_TABLE_UPGRADE_REQUIRED = 10923
+ER_GET_ERRNO_FROM_STORAGE_ENGINE = 10924
+ER_ACCESS_DENIED_ERROR_WITHOUT_PASSWORD = 10925
+ER_ACCESS_DENIED_ERROR_WITH_PASSWORD = 10926
+ER_ACCESS_DENIED_FOR_USER_ACCOUNT_LOCKED = 10927
+ER_MUST_CHANGE_EXPIRED_PASSWORD = 10928
+ER_SYSTEM_TABLES_NOT_SUPPORTED_BY_STORAGE_ENGINE = 10929
+ER_FILESORT_TERMINATED = 10930
+ER_SERVER_STARTUP_MSG = 10931
+ER_FAILED_TO_FIND_LOCALE_NAME = 10932
+ER_FAILED_TO_FIND_COLLATION_NAME = 10933
+ER_SERVER_OUT_OF_RESOURCES = 10934
+ER_SERVER_OUTOFMEMORY = 10935
+ER_INVALID_COLLATION_FOR_CHARSET = 10936
+ER_CANT_START_ERROR_LOG_SERVICE = 10937
+ER_CREATING_NEW_UUID_FIRST_START = 10938
+ER_FAILED_TO_GET_ABSOLUTE_PATH = 10939
+ER_PERFSCHEMA_COMPONENTS_INFRASTRUCTURE_BOOTSTRAP = 10940
+ER_PERFSCHEMA_COMPONENTS_INFRASTRUCTURE_SHUTDOWN = 10941
+ER_DUP_FD_OPEN_FAILED = 10942
+ER_SYSTEM_VIEW_INIT_FAILED = 10943
+ER_RESOURCE_GROUP_POST_INIT_FAILED = 10944
+ER_RESOURCE_GROUP_SUBSYSTEM_INIT_FAILED = 10945
+ER_FAILED_START_MYSQLD_DAEMON = 10946
+ER_CANNOT_CHANGE_TO_ROOT_DIR = 10947
+ER_PERSISTENT_PRIVILEGES_BOOTSTRAP = 10948
+ER_BASEDIR_SET_TO = 10949
+ER_RPL_FILTER_ADD_WILD_DO_TABLE_FAILED = 10950
+ER_RPL_FILTER_ADD_WILD_IGNORE_TABLE_FAILED = 10951
+ER_PRIVILEGE_SYSTEM_INIT_FAILED = 10952
+ER_CANNOT_SET_LOG_ERROR_SERVICES = 10953
+ER_PERFSCHEMA_TABLES_INIT_FAILED = 10954
+ER_TX_EXTRACTION_ALGORITHM_FOR_BINLOG_TX_DEPEDENCY_TRACKING = 10955
+ER_INVALID_REPLICATION_TIMESTAMPS = 10956
+ER_RPL_TIMESTAMPS_RETURNED_TO_NORMAL = 10957
+ER_BINLOG_FILE_OPEN_FAILED = 10958
+ER_BINLOG_EVENT_WRITE_TO_STMT_CACHE_FAILED = 10959
+ER_SLAVE_RELAY_LOG_TRUNCATE_INFO = 10960
+ER_SLAVE_RELAY_LOG_PURGE_FAILED = 10961
+ER_RPL_SLAVE_FILTER_CREATE_FAILED = 10962
+ER_RPL_SLAVE_GLOBAL_FILTERS_COPY_FAILED = 10963
+ER_RPL_SLAVE_RESET_FILTER_OPTIONS = 10964
+ER_MISSING_GRANT_SYSTEM_TABLE = 10965
+ER_MISSING_ACL_SYSTEM_TABLE = 10966
+ER_ANONYMOUS_AUTH_ID_NOT_ALLOWED_IN_MANDATORY_ROLES = 10967
+ER_UNKNOWN_AUTH_ID_IN_MANDATORY_ROLE = 10968
+ER_WRITE_ROW_TO_PARTITION_FAILED = 10969
+ER_RESOURCE_GROUP_METADATA_UPDATE_SKIPPED = 10970
+ER_FAILED_TO_PERSIST_RESOURCE_GROUP_METADATA = 10971
+ER_FAILED_TO_DESERIALIZE_RESOURCE_GROUP = 10972
+ER_FAILED_TO_UPDATE_RESOURCE_GROUP = 10973
+ER_RESOURCE_GROUP_VALIDATION_FAILED = 10974
+ER_FAILED_TO_ALLOCATE_MEMORY_FOR_RESOURCE_GROUP = 10975
+ER_FAILED_TO_ALLOCATE_MEMORY_FOR_RESOURCE_GROUP_HASH = 10976
+ER_FAILED_TO_ADD_RESOURCE_GROUP_TO_MAP = 10977
+ER_RESOURCE_GROUP_IS_DISABLED = 10978
+ER_FAILED_TO_APPLY_RESOURCE_GROUP_CONTROLLER = 10979
+ER_FAILED_TO_ACQUIRE_LOCK_ON_RESOURCE_GROUP = 10980
+ER_PFS_NOTIFICATION_FUNCTION_REGISTER_FAILED = 10981
+ER_RES_GRP_SET_THR_AFFINITY_FAILED = 10982
+ER_RES_GRP_SET_THR_AFFINITY_TO_CPUS_FAILED = 10983
+ER_RES_GRP_THD_UNBIND_FROM_CPU_FAILED = 10984
+ER_RES_GRP_SET_THREAD_PRIORITY_FAILED = 10985
+ER_RES_GRP_FAILED_TO_DETERMINE_NICE_CAPABILITY = 10986
+ER_RES_GRP_FAILED_TO_GET_THREAD_HANDLE = 10987
+ER_RES_GRP_GET_THREAD_PRIO_NOT_SUPPORTED = 10988
+ER_RES_GRP_FAILED_DETERMINE_CPU_COUNT = 10989
+ER_RES_GRP_FEATURE_NOT_AVAILABLE = 10990
+ER_RES_GRP_INVALID_THREAD_PRIORITY = 10991
+ER_RES_GRP_SOLARIS_PROCESSOR_BIND_TO_CPUID_FAILED = 10992
+ER_RES_GRP_SOLARIS_PROCESSOR_BIND_TO_THREAD_FAILED = 10993
+ER_RES_GRP_SOLARIS_PROCESSOR_AFFINITY_FAILED = 10994
+ER_DD_UPGRADE_RENAME_IDX_STATS_FILE_FAILED = 10995
+ER_DD_UPGRADE_DD_OPEN_FAILED = 10996
+ER_DD_UPGRADE_FAILED_TO_FETCH_TABLESPACES = 10997
+ER_DD_UPGRADE_FAILED_TO_ACQUIRE_TABLESPACE = 10998
+ER_DD_UPGRADE_FAILED_TO_RESOLVE_TABLESPACE_ENGINE = 10999
+ER_FAILED_TO_CREATE_SDI_FOR_TABLESPACE = 11000
+ER_FAILED_TO_STORE_SDI_FOR_TABLESPACE = 11001
+ER_DD_UPGRADE_FAILED_TO_FETCH_TABLES = 11002
+ER_DD_UPGRADE_DD_POPULATED = 11003
+ER_DD_UPGRADE_INFO_FILE_OPEN_FAILED = 11004
+ER_DD_UPGRADE_INFO_FILE_CLOSE_FAILED = 11005
+ER_DD_UPGRADE_TABLESPACE_MIGRATION_FAILED = 11006
+ER_DD_UPGRADE_FAILED_TO_CREATE_TABLE_STATS = 11007
+ER_DD_UPGRADE_TABLE_STATS_MIGRATE_COMPLETED = 11008
+ER_DD_UPGRADE_FAILED_TO_CREATE_INDEX_STATS = 11009
+ER_DD_UPGRADE_INDEX_STATS_MIGRATE_COMPLETED = 11010
+ER_DD_UPGRADE_FAILED_FIND_VALID_DATA_DIR = 11011
+ER_DD_UPGRADE_START = 11012
+ER_DD_UPGRADE_FAILED_INIT_DD_SE = 11013
+ER_DD_UPGRADE_FOUND_PARTIALLY_UPGRADED_DD_ABORT = 11014
+ER_DD_UPGRADE_FOUND_PARTIALLY_UPGRADED_DD_CONTINUE = 11015
+ER_DD_UPGRADE_SE_LOGS_FAILED = 11016
+ER_DD_UPGRADE_SDI_INFO_UPDATE_FAILED = 11017
+ER_SKIP_UPDATING_METADATA_IN_SE_RO_MODE = 11018
+ER_CREATED_SYSTEM_WITH_VERSION = 11019
+ER_UNKNOWN_ERROR_DETECTED_IN_SE = 11020
+ER_READ_LOG_EVENT_FAILED = 11021
+ER_ROW_DATA_TOO_BIG_TO_WRITE_IN_BINLOG = 11022
+ER_FAILED_TO_CONSTRUCT_DROP_EVENT_QUERY = 11023
+ER_FAILED_TO_BINLOG_DROP_EVENT = 11024
+ER_FAILED_TO_START_SLAVE_THREAD = 11025
+ER_RPL_IO_THREAD_KILLED = 11026
+ER_SLAVE_RECONNECT_FAILED = 11027
+ER_SLAVE_KILLED_AFTER_RECONNECT = 11028
+ER_SLAVE_NOT_STARTED_ON_SOME_CHANNELS = 11029
+ER_FAILED_TO_ADD_RPL_FILTER = 11030
+ER_PER_CHANNEL_RPL_FILTER_CONF_FOR_GRP_RPL = 11031
+ER_RPL_FILTERS_NOT_ATTACHED_TO_CHANNEL = 11032
+ER_FAILED_TO_BUILD_DO_AND_IGNORE_TABLE_HASHES = 11033
+ER_CLONE_PLUGIN_NOT_LOADED = 11034
+ER_CLONE_HANDLER_EXISTS = 11035
+ER_FAILED_TO_CREATE_CLONE_HANDLER = 11036
+ER_CYCLE_TIMER_IS_NOT_AVAILABLE = 11037
+ER_NANOSECOND_TIMER_IS_NOT_AVAILABLE = 11038
+ER_MICROSECOND_TIMER_IS_NOT_AVAILABLE = 11039
+ER_PFS_MALLOC_ARRAY_OVERFLOW = 11040
+ER_PFS_MALLOC_ARRAY_OOM = 11041
+ER_INNODB_FAILED_TO_FIND_IDX_WITH_KEY_NO = 11042
+ER_INNODB_FAILED_TO_FIND_IDX = 11043
+ER_INNODB_FAILED_TO_FIND_IDX_FROM_DICT_CACHE = 11044
+ER_INNODB_ACTIVE_INDEX_CHANGE_FAILED = 11045
+ER_INNODB_DIFF_IN_REF_LEN = 11046
+ER_WRONG_TYPE_FOR_COLUMN_PREFIX_IDX_FLD = 11047
+ER_INNODB_CANNOT_CREATE_TABLE = 11048
+ER_INNODB_INTERNAL_INDEX = 11049
+ER_INNODB_IDX_CNT_MORE_THAN_DEFINED_IN_MYSQL = 11050
+ER_INNODB_IDX_CNT_FEWER_THAN_DEFINED_IN_MYSQL = 11051
+ER_INNODB_IDX_COLUMN_CNT_DIFF = 11052
+ER_INNODB_USE_MONITOR_GROUP_NAME = 11053
+ER_INNODB_MONITOR_DEFAULT_VALUE_NOT_DEFINED = 11054
+ER_INNODB_MONITOR_IS_ENABLED = 11055
+ER_INNODB_INVALID_MONITOR_COUNTER_NAME = 11056
+ER_WIN_LOAD_LIBRARY_FAILED = 11057
+ER_PARTITION_HANDLER_ADMIN_MSG = 11058
+ER_RPL_RLI_INIT_INFO_MSG = 11059
+ER_DD_UPGRADE_TABLE_INTACT_ERROR = 11060
+ER_SERVER_INIT_COMPILED_IN_COMMANDS = 11061
+ER_MYISAM_CHECK_METHOD_ERROR = 11062
+ER_MYISAM_CRASHED_ERROR = 11063
+ER_WAITPID_FAILED = 11064
+ER_FAILED_TO_FIND_MYSQLD_STATUS = 11065
+ER_INNODB_ERROR_LOGGER_MSG = 11066
+ER_INNODB_ERROR_LOGGER_FATAL_MSG = 11067
+ER_DEPRECATED_SYNTAX_WITH_REPLACEMENT = 11068
+ER_DEPRECATED_SYNTAX_NO_REPLACEMENT = 11069
+ER_DEPRECATE_MSG_NO_REPLACEMENT = 11070
+ER_LOG_PRINTF_MSG = 11071
+ER_BINLOG_LOGGING_NOT_POSSIBLE = 11072
+ER_FAILED_TO_SET_PERSISTED_OPTIONS = 11073
+ER_COMPONENTS_FAILED_TO_ACQUIRE_SERVICE_IMPLEMENTATION = 11074
+ER_RES_GRP_INVALID_VCPU_RANGE = 11075
+ER_RES_GRP_INVALID_VCPU_ID = 11076
+ER_ERROR_DURING_FLUSH_LOG_COMMIT_PHASE = 11077
+ER_DROP_DATABASE_FAILED_RMDIR_MANUALLY = 11078
+ER_EXPIRE_LOGS_DAYS_IGNORED = 11079
+ER_BINLOG_MALFORMED_OR_OLD_RELAY_LOG = 11080
+ER_DD_UPGRADE_VIEW_COLUMN_NAME_TOO_LONG = 11081
+ER_TABLE_NEEDS_DUMP_UPGRADE = 11082
+ER_DD_UPGRADE_FAILED_TO_UPDATE_VER_NO_IN_TABLESPACE = 11083
+ER_KEYRING_MIGRATION_FAILED = 11084
+ER_KEYRING_MIGRATION_SUCCESSFUL = 11085
+ER_RESTART_RECEIVED_INFO = 11086
+ER_LCTN_CHANGED = 11087
+ER_DD_INITIALIZE = 11088
+ER_DD_RESTART = 11089
+ER_DD_UPGRADE = 11090
+ER_DD_UPGRADE_OFF = 11091
+ER_DD_UPGRADE_VERSION_NOT_SUPPORTED = 11092
+ER_DD_UPGRADE_SCHEMA_UNAVAILABLE = 11093
+ER_DD_MINOR_DOWNGRADE = 11094
+ER_DD_MINOR_DOWNGRADE_VERSION_NOT_SUPPORTED = 11095
+ER_DD_NO_VERSION_FOUND = 11096
+ER_THREAD_POOL_NOT_SUPPORTED_ON_PLATFORM = 11097
+ER_THREAD_POOL_SIZE_TOO_LOW = 11098
+ER_THREAD_POOL_SIZE_TOO_HIGH = 11099
+ER_THREAD_POOL_ALGORITHM_INVALID = 11100
+ER_THREAD_POOL_INVALID_STALL_LIMIT = 11101
+ER_THREAD_POOL_INVALID_PRIO_KICKUP_TIMER = 11102
+ER_THREAD_POOL_MAX_UNUSED_THREADS_INVALID = 11103
+ER_THREAD_POOL_CON_HANDLER_INIT_FAILED = 11104
+ER_THREAD_POOL_INIT_FAILED = 11105
+ER_THREAD_POOL_PLUGIN_STARTED = 11106
+ER_THREAD_POOL_CANNOT_SET_THREAD_SPECIFIC_DATA = 11107
+ER_THREAD_POOL_FAILED_TO_CREATE_CONNECT_HANDLER_THD = 11108
+ER_THREAD_POOL_FAILED_TO_CREATE_THD_AND_AUTH_CONN = 11109
+ER_THREAD_POOL_FAILED_PROCESS_CONNECT_EVENT = 11110
+ER_THREAD_POOL_FAILED_TO_CREATE_POOL = 11111
+ER_THREAD_POOL_RATE_LIMITED_ERROR_MSGS = 11112
+ER_TRHEAD_POOL_LOW_LEVEL_INIT_FAILED = 11113
+ER_THREAD_POOL_LOW_LEVEL_REARM_FAILED = 11114
+ER_THREAD_POOL_BUFFER_TOO_SMALL = 11115
+ER_MECAB_NOT_SUPPORTED = 11116
+ER_MECAB_NOT_VERIFIED = 11117
+ER_MECAB_CREATING_MODEL = 11118
+ER_MECAB_FAILED_TO_CREATE_MODEL = 11119
+ER_MECAB_FAILED_TO_CREATE_TRIGGER = 11120
+ER_MECAB_UNSUPPORTED_CHARSET = 11121
+ER_MECAB_CHARSET_LOADED = 11122
+ER_MECAB_PARSE_FAILED = 11123
+ER_MECAB_OOM_WHILE_PARSING_TEXT = 11124
+ER_MECAB_CREATE_LATTICE_FAILED = 11125
+ER_SEMISYNC_TRACE_ENTER_FUNC = 11126
+ER_SEMISYNC_TRACE_EXIT_WITH_INT_EXIT_CODE = 11127
+ER_SEMISYNC_TRACE_EXIT_WITH_BOOL_EXIT_CODE = 11128
+ER_SEMISYNC_TRACE_EXIT = 11129
+ER_SEMISYNC_RPL_INIT_FOR_TRX = 11130
+ER_SEMISYNC_FAILED_TO_ALLOCATE_TRX_NODE = 11131
+ER_SEMISYNC_BINLOG_WRITE_OUT_OF_ORDER = 11132
+ER_SEMISYNC_INSERT_LOG_INFO_IN_ENTRY = 11133
+ER_SEMISYNC_PROBE_LOG_INFO_IN_ENTRY = 11134
+ER_SEMISYNC_CLEARED_ALL_ACTIVE_TRANSACTION_NODES = 11135
+ER_SEMISYNC_CLEARED_ACTIVE_TRANSACTION_TILL_POS = 11136
+ER_SEMISYNC_REPLY_MAGIC_NO_ERROR = 11137
+ER_SEMISYNC_REPLY_PKT_LENGTH_TOO_SMALL = 11138
+ER_SEMISYNC_REPLY_BINLOG_FILE_TOO_LARGE = 11139
+ER_SEMISYNC_SERVER_REPLY = 11140
+ER_SEMISYNC_FUNCTION_CALLED_TWICE = 11141
+ER_SEMISYNC_RPL_ENABLED_ON_MASTER = 11142
+ER_SEMISYNC_MASTER_OOM = 11143
+ER_SEMISYNC_DISABLED_ON_MASTER = 11144
+ER_SEMISYNC_FORCED_SHUTDOWN = 11145
+ER_SEMISYNC_MASTER_GOT_REPLY_AT_POS = 11146
+ER_SEMISYNC_MASTER_SIGNAL_ALL_WAITING_THREADS = 11147
+ER_SEMISYNC_MASTER_TRX_WAIT_POS = 11148
+ER_SEMISYNC_BINLOG_REPLY_IS_AHEAD = 11149
+ER_SEMISYNC_MOVE_BACK_WAIT_POS = 11150
+ER_SEMISYNC_INIT_WAIT_POS = 11151
+ER_SEMISYNC_WAIT_TIME_FOR_BINLOG_SENT = 11152
+ER_SEMISYNC_WAIT_FOR_BINLOG_TIMEDOUT = 11153
+ER_SEMISYNC_WAIT_TIME_ASSESSMENT_FOR_COMMIT_TRX_FAILED = 11154
+ER_SEMISYNC_RPL_SWITCHED_OFF = 11155
+ER_SEMISYNC_RPL_SWITCHED_ON = 11156
+ER_SEMISYNC_NO_SPACE_IN_THE_PKT = 11157
+ER_SEMISYNC_SYNC_HEADER_UPDATE_INFO = 11158
+ER_SEMISYNC_FAILED_TO_INSERT_TRX_NODE = 11159
+ER_SEMISYNC_TRX_SKIPPED_AT_POS = 11160
+ER_SEMISYNC_MASTER_FAILED_ON_NET_FLUSH = 11161
+ER_SEMISYNC_RECEIVED_ACK_IS_SMALLER = 11162
+ER_SEMISYNC_ADD_ACK_TO_SLOT = 11163
+ER_SEMISYNC_UPDATE_EXISTING_SLAVE_ACK = 11164
+ER_SEMISYNC_FAILED_TO_START_ACK_RECEIVER_THD = 11165
+ER_SEMISYNC_STARTING_ACK_RECEIVER_THD = 11166
+ER_SEMISYNC_FAILED_TO_WAIT_ON_DUMP_SOCKET = 11167
+ER_SEMISYNC_STOPPING_ACK_RECEIVER_THREAD = 11168
+ER_SEMISYNC_FAILED_REGISTER_SLAVE_TO_RECEIVER = 11169
+ER_SEMISYNC_START_BINLOG_DUMP_TO_SLAVE = 11170
+ER_SEMISYNC_STOP_BINLOG_DUMP_TO_SLAVE = 11171
+ER_SEMISYNC_UNREGISTER_TRX_OBSERVER_FAILED = 11172
+ER_SEMISYNC_UNREGISTER_BINLOG_STORAGE_OBSERVER_FAILED = 11173
+ER_SEMISYNC_UNREGISTER_BINLOG_TRANSMIT_OBSERVER_FAILED = 11174
+ER_SEMISYNC_UNREGISTERED_REPLICATOR = 11175
+ER_SEMISYNC_SOCKET_FD_TOO_LARGE = 11176
+ER_SEMISYNC_SLAVE_REPLY = 11177
+ER_SEMISYNC_MISSING_MAGIC_NO_FOR_SEMISYNC_PKT = 11178
+ER_SEMISYNC_SLAVE_START = 11179
+ER_SEMISYNC_SLAVE_REPLY_WITH_BINLOG_INFO = 11180
+ER_SEMISYNC_SLAVE_NET_FLUSH_REPLY_FAILED = 11181
+ER_SEMISYNC_SLAVE_SEND_REPLY_FAILED = 11182
+ER_SEMISYNC_EXECUTION_FAILED_ON_MASTER = 11183
+ER_SEMISYNC_NOT_SUPPORTED_BY_MASTER = 11184
+ER_SEMISYNC_SLAVE_SET_FAILED = 11185
+ER_SEMISYNC_FAILED_TO_STOP_ACK_RECEIVER_THD = 11186
+ER_FIREWALL_FAILED_TO_READ_FIREWALL_TABLES = 11187
+ER_FIREWALL_FAILED_TO_REG_DYNAMIC_PRIVILEGES = 11188
+ER_FIREWALL_RECORDING_STMT_WAS_TRUNCATED = 11189
+ER_FIREWALL_RECORDING_STMT_WITHOUT_TEXT = 11190
+ER_FIREWALL_SUSPICIOUS_STMT = 11191
+ER_FIREWALL_ACCESS_DENIED = 11192
+ER_FIREWALL_SKIPPED_UNKNOWN_USER_MODE = 11193
+ER_FIREWALL_RELOADING_CACHE = 11194
+ER_FIREWALL_RESET_FOR_USER = 11195
+ER_FIREWALL_STATUS_FLUSHED = 11196
+ER_KEYRING_LOGGER_ERROR_MSG = 11197
+ER_AUDIT_LOG_FILTER_IS_NOT_INSTALLED = 11198
+ER_AUDIT_LOG_SWITCHING_TO_INCLUDE_LIST = 11199
+ER_AUDIT_LOG_CANNOT_SET_LOG_POLICY_WITH_OTHER_POLICIES = 11200
+ER_AUDIT_LOG_ONLY_INCLUDE_LIST_USED = 11201
+ER_AUDIT_LOG_INDEX_MAP_CANNOT_ACCESS_DIR = 11202
+ER_AUDIT_LOG_WRITER_RENAME_FILE_FAILED = 11203
+ER_AUDIT_LOG_WRITER_DEST_FILE_ALREADY_EXISTS = 11204
+ER_AUDIT_LOG_WRITER_RENAME_FILE_FAILED_REMOVE_FILE_MANUALLY = 11205
+ER_AUDIT_LOG_WRITER_INCOMPLETE_FILE_RENAMED = 11206
+ER_AUDIT_LOG_WRITER_FAILED_TO_WRITE_TO_FILE = 11207
+ER_AUDIT_LOG_EC_WRITER_FAILED_TO_INIT_ENCRYPTION = 11208
+ER_AUDIT_LOG_EC_WRITER_FAILED_TO_INIT_COMPRESSION = 11209
+ER_AUDIT_LOG_EC_WRITER_FAILED_TO_CREATE_FILE = 11210
+ER_AUDIT_LOG_RENAME_LOG_FILE_BEFORE_FLUSH = 11211
+ER_AUDIT_LOG_FILTER_RESULT_MSG = 11212
+ER_AUDIT_LOG_JSON_READER_FAILED_TO_PARSE = 11213
+ER_AUDIT_LOG_JSON_READER_BUF_TOO_SMALL = 11214
+ER_AUDIT_LOG_JSON_READER_FAILED_TO_OPEN_FILE = 11215
+ER_AUDIT_LOG_JSON_READER_FILE_PARSING_ERROR = 11216
+ER_AUDIT_LOG_FILTER_INVALID_COLUMN_COUNT = 11217
+ER_AUDIT_LOG_FILTER_INVALID_COLUMN_DEFINITION = 11218
+ER_AUDIT_LOG_FILTER_FAILED_TO_STORE_TABLE_FLDS = 11219
+ER_AUDIT_LOG_FILTER_FAILED_TO_UPDATE_TABLE = 11220
+ER_AUDIT_LOG_FILTER_FAILED_TO_INSERT_INTO_TABLE = 11221
+ER_AUDIT_LOG_FILTER_FAILED_TO_DELETE_FROM_TABLE = 11222
+ER_AUDIT_LOG_FILTER_FAILED_TO_INIT_TABLE_FOR_READ = 11223
+ER_AUDIT_LOG_FILTER_FAILED_TO_READ_TABLE = 11224
+ER_AUDIT_LOG_FILTER_FAILED_TO_CLOSE_TABLE_AFTER_READING = 11225
+ER_AUDIT_LOG_FILTER_USER_AND_HOST_CANNOT_BE_EMPTY = 11226
+ER_AUDIT_LOG_FILTER_FLD_FILTERNAME_CANNOT_BE_EMPTY = 11227
+ER_VALIDATE_PWD_DICT_FILE_NOT_SPECIFIED = 11228
+ER_VALIDATE_PWD_DICT_FILE_NOT_LOADED = 11229
+ER_VALIDATE_PWD_DICT_FILE_TOO_BIG = 11230
+ER_VALIDATE_PWD_FAILED_TO_READ_DICT_FILE = 11231
+ER_VALIDATE_PWD_FAILED_TO_GET_FLD_FROM_SECURITY_CTX = 11232
+ER_VALIDATE_PWD_FAILED_TO_GET_SECURITY_CTX = 11233
+ER_VALIDATE_PWD_LENGTH_CHANGED = 11234
+ER_REWRITER_QUERY_ERROR_MSG = 11235
+ER_REWRITER_QUERY_FAILED = 11236
+ER_XPLUGIN_STARTUP_FAILED = 11237
+ER_XPLUGIN_SERVER_EXITING = 11238
+ER_XPLUGIN_SERVER_EXITED = 11239
+ER_XPLUGIN_USING_SSL_CONF_FROM_SERVER = 11240
+ER_XPLUGIN_USING_SSL_CONF_FROM_MYSQLX = 11241
+ER_XPLUGIN_FAILED_TO_USE_SSL_CONF = 11242
+ER_XPLUGIN_USING_SSL_FOR_TLS_CONNECTION = 11243
+ER_XPLUGIN_REFERENCE_TO_SECURE_CONN_WITH_XPLUGIN = 11244
+ER_XPLUGIN_ERROR_MSG = 11245
+ER_SHA_PWD_FAILED_TO_PARSE_AUTH_STRING = 11246
+ER_SHA_PWD_FAILED_TO_GENERATE_MULTI_ROUND_HASH = 11247
+ER_SHA_PWD_AUTH_REQUIRES_RSA_OR_SSL = 11248
+ER_SHA_PWD_RSA_KEY_TOO_LONG = 11249
+ER_PLUGIN_COMMON_FAILED_TO_OPEN_FILTER_TABLES = 11250
+ER_PLUGIN_COMMON_FAILED_TO_OPEN_TABLE = 11251
+ER_AUTH_LDAP_ERROR_LOGGER_ERROR_MSG = 11252
+ER_CONN_CONTROL_ERROR_MSG = 11253
+ER_GRP_RPL_ERROR_MSG = 11254
+ER_SHA_PWD_SALT_FOR_USER_CORRUPT = 11255
+ER_SYS_VAR_COMPONENT_OOM = 11256
+ER_SYS_VAR_COMPONENT_VARIABLE_SET_READ_ONLY = 11257
+ER_SYS_VAR_COMPONENT_UNKNOWN_VARIABLE_TYPE = 11258
+ER_SYS_VAR_COMPONENT_FAILED_TO_PARSE_VARIABLE_OPTIONS = 11259
+ER_SYS_VAR_COMPONENT_FAILED_TO_MAKE_VARIABLE_PERSISTENT = 11260
+ER_COMPONENT_FILTER_CONFUSED = 11261
+ER_STOP_SLAVE_IO_THREAD_DISK_SPACE = 11262
+ER_LOG_FILE_CANNOT_OPEN = 11263
+OBSOLETE_ER_UNABLE_TO_COLLECT_INSTANCE_LOG_STATUS = 11264
+OBSOLETE_ER_DEPRECATED_UTF8_ALIAS = 11265
+OBSOLETE_ER_DEPRECATED_NATIONAL = 11266
+OBSOLETE_ER_SLAVE_POSSIBLY_DIVERGED_AFTER_DDL = 11267
+ER_PERSIST_OPTION_STATUS = 11268
+ER_NOT_IMPLEMENTED_GET_TABLESPACE_STATISTICS = 11269
+OBSOLETE_ER_UNABLE_TO_SET_OPTION = 11270
+OBSOLETE_ER_RESERVED_TABLESPACE_NAME = 11271
+ER_SSL_FIPS_MODE_ERROR = 11272
+ER_CONN_INIT_CONNECT_IGNORED = 11273
+ER_UNSUPPORTED_SQL_MODE = 11274
+ER_REWRITER_OOM = 11275
+ER_REWRITER_TABLE_MALFORMED_ERROR = 11276
+ER_REWRITER_LOAD_FAILED = 11277
+ER_REWRITER_READ_FAILED = 11278
+ER_CONN_CONTROL_EVENT_COORDINATOR_INIT_FAILED = 11279
+ER_CONN_CONTROL_STAT_CONN_DELAY_TRIGGERED_UPDATE_FAILED = 11280
+ER_CONN_CONTROL_STAT_CONN_DELAY_TRIGGERED_RESET_FAILED = 11281
+ER_CONN_CONTROL_INVALID_CONN_DELAY_TYPE = 11282
+ER_CONN_CONTROL_DELAY_ACTION_INIT_FAILED = 11283
+ER_CONN_CONTROL_FAILED_TO_SET_CONN_DELAY = 11284
+ER_CONN_CONTROL_FAILED_TO_UPDATE_CONN_DELAY_HASH = 11285
+ER_XPLUGIN_FORCE_STOP_CLIENT = 11286
+ER_XPLUGIN_MAX_AUTH_ATTEMPTS_REACHED = 11287
+ER_XPLUGIN_BUFFER_PAGE_ALLOC_FAILED = 11288
+ER_XPLUGIN_DETECTED_HANGING_CLIENTS = 11289
+ER_XPLUGIN_FAILED_TO_ACCEPT_CLIENT = 11290
+ER_XPLUGIN_FAILED_TO_SCHEDULE_CLIENT = 11291
+ER_XPLUGIN_FAILED_TO_PREPARE_IO_INTERFACES = 11292
+ER_XPLUGIN_SRV_SESSION_INIT_THREAD_FAILED = 11293
+ER_XPLUGIN_UNABLE_TO_USE_USER_SESSION_ACCOUNT = 11294
+ER_XPLUGIN_REFERENCE_TO_USER_ACCOUNT_DOC_SECTION = 11295
+ER_XPLUGIN_UNEXPECTED_EXCEPTION_DISPATCHING_CMD = 11296
+ER_XPLUGIN_EXCEPTION_IN_TASK_SCHEDULER = 11297
+ER_XPLUGIN_TASK_SCHEDULING_FAILED = 11298
+ER_XPLUGIN_EXCEPTION_IN_EVENT_LOOP = 11299
+ER_XPLUGIN_LISTENER_SETUP_FAILED = 11300
+ER_XPLUING_NET_STARTUP_FAILED = 11301
+ER_XPLUGIN_FAILED_AT_SSL_CONF = 11302
+ER_XPLUGIN_CLIENT_SSL_HANDSHAKE_FAILED = 11303
+ER_XPLUGIN_SSL_HANDSHAKE_WITH_SERVER_FAILED = 11304
+ER_XPLUGIN_FAILED_TO_CREATE_SESSION_FOR_CONN = 11305
+ER_XPLUGIN_FAILED_TO_INITIALIZE_SESSION = 11306
+ER_XPLUGIN_MESSAGE_TOO_LONG = 11307
+ER_XPLUGIN_UNINITIALIZED_MESSAGE = 11308
+ER_XPLUGIN_FAILED_TO_SET_MIN_NUMBER_OF_WORKERS = 11309
+ER_XPLUGIN_UNABLE_TO_ACCEPT_CONNECTION = 11310
+ER_XPLUGIN_ALL_IO_INTERFACES_DISABLED = 11311
+ER_XPLUGIN_INVALID_MSG_DURING_CLIENT_INIT = 11312
+ER_XPLUGIN_CLOSING_CLIENTS_ON_SHUTDOWN = 11313
+ER_XPLUGIN_ERROR_READING_SOCKET = 11314
+ER_XPLUGIN_PEER_DISCONNECTED_WHILE_READING_MSG_BODY = 11315
+ER_XPLUGIN_READ_FAILED_CLOSING_CONNECTION = 11316
+ER_XPLUGIN_INVALID_AUTH_METHOD = 11317
+ER_XPLUGIN_UNEXPECTED_MSG_DURING_AUTHENTICATION = 11318
+ER_XPLUGIN_ERROR_WRITING_TO_CLIENT = 11319
+ER_XPLUGIN_SCHEDULER_STARTED = 11320
+ER_XPLUGIN_SCHEDULER_STOPPED = 11321
+ER_XPLUGIN_LISTENER_SYS_VARIABLE_ERROR = 11322
+ER_XPLUGIN_LISTENER_STATUS_MSG = 11323
+ER_XPLUGIN_RETRYING_BIND_ON_PORT = 11324
+ER_XPLUGIN_SHUTDOWN_TRIGGERED = 11325
+ER_XPLUGIN_USER_ACCOUNT_WITH_ALL_PERMISSIONS = 11326
+ER_XPLUGIN_EXISTING_USER_ACCOUNT_WITH_INCOMPLETE_GRANTS = 11327
+ER_XPLUGIN_SERVER_STARTS_HANDLING_CONNECTIONS = 11328
+ER_XPLUGIN_SERVER_STOPPED_HANDLING_CONNECTIONS = 11329
+ER_XPLUGIN_FAILED_TO_INTERRUPT_SESSION = 11330
+ER_XPLUGIN_CLIENT_RELEASE_TRIGGERED = 11331
+ER_XPLUGIN_IPv6_AVAILABLE = 11332
+ER_XPLUGIN_UNIX_SOCKET_NOT_CONFIGURED = 11333
+ER_XPLUGIN_CLIENT_KILL_MSG = 11334
+ER_XPLUGIN_FAILED_TO_GET_SECURITY_CTX = 11335
+ER_XPLUGIN_FAILED_TO_SWITCH_SECURITY_CTX_TO_ROOT = 11336
+ER_XPLUGIN_FAILED_TO_CLOSE_SQL_SESSION = 11337
+ER_XPLUGIN_FAILED_TO_EXECUTE_ADMIN_CMD = 11338
+ER_XPLUGIN_EMPTY_ADMIN_CMD = 11339
+ER_XPLUGIN_FAILED_TO_GET_SYS_VAR = 11340
+ER_XPLUGIN_FAILED_TO_GET_CREATION_STMT = 11341
+ER_XPLUGIN_FAILED_TO_GET_ENGINE_INFO = 11342
+ER_XPLUGIN_FAIL_TO_GET_RESULT_DATA = 11343
+ER_XPLUGIN_CAPABILITY_EXPIRED_PASSWORD = 11344
+ER_XPLUGIN_FAILED_TO_SET_SO_REUSEADDR_FLAG = 11345
+ER_XPLUGIN_FAILED_TO_OPEN_INTERNAL_SESSION = 11346
+ER_XPLUGIN_FAILED_TO_SWITCH_CONTEXT = 11347
+ER_XPLUGIN_FAILED_TO_UNREGISTER_UDF = 11348
+ER_XPLUGIN_GET_PEER_ADDRESS_FAILED = 11349
+ER_XPLUGIN_CAPABILITY_CLIENT_INTERACTIVE_FAILED = 11350
+ER_XPLUGIN_FAILED_TO_RESET_IPV6_V6ONLY_FLAG = 11351
+ER_KEYRING_INVALID_KEY_TYPE = 11352
+ER_KEYRING_INVALID_KEY_LENGTH = 11353
+ER_KEYRING_FAILED_TO_CREATE_KEYRING_DIR = 11354
+ER_KEYRING_FILE_INIT_FAILED = 11355
+ER_KEYRING_INTERNAL_EXCEPTION_FAILED_FILE_INIT = 11356
+ER_KEYRING_FAILED_TO_GENERATE_KEY = 11357
+ER_KEYRING_CHECK_KEY_FAILED_DUE_TO_INVALID_KEY = 11358
+ER_KEYRING_CHECK_KEY_FAILED_DUE_TO_EMPTY_KEY_ID = 11359
+ER_KEYRING_OPERATION_FAILED_DUE_TO_INTERNAL_ERROR = 11360
+ER_KEYRING_INCORRECT_FILE = 11361
+ER_KEYRING_FOUND_MALFORMED_BACKUP_FILE = 11362
+ER_KEYRING_FAILED_TO_RESTORE_FROM_BACKUP_FILE = 11363
+ER_KEYRING_FAILED_TO_FLUSH_KEYRING_TO_FILE = 11364
+ER_KEYRING_FAILED_TO_GET_FILE_STAT = 11365
+ER_KEYRING_FAILED_TO_REMOVE_FILE = 11366
+ER_KEYRING_FAILED_TO_TRUNCATE_FILE = 11367
+ER_KEYRING_UNKNOWN_ERROR = 11368
+ER_KEYRING_FAILED_TO_SET_KEYRING_FILE_DATA = 11369
+ER_KEYRING_FILE_IO_ERROR = 11370
+ER_KEYRING_FAILED_TO_LOAD_KEYRING_CONTENT = 11371
+ER_KEYRING_FAILED_TO_FLUSH_KEYS_TO_KEYRING = 11372
+ER_KEYRING_FAILED_TO_FLUSH_KEYS_TO_KEYRING_BACKUP = 11373
+ER_KEYRING_KEY_FETCH_FAILED_DUE_TO_EMPTY_KEY_ID = 11374
+ER_KEYRING_FAILED_TO_REMOVE_KEY_DUE_TO_EMPTY_ID = 11375
+ER_KEYRING_OKV_INCORRECT_KEY_VAULT_CONFIGURED = 11376
+ER_KEYRING_OKV_INIT_FAILED_DUE_TO_INCORRECT_CONF = 11377
+ER_KEYRING_OKV_INIT_FAILED_DUE_TO_INTERNAL_ERROR = 11378
+ER_KEYRING_OKV_INVALID_KEY_TYPE = 11379
+ER_KEYRING_OKV_INVALID_KEY_LENGTH_FOR_CIPHER = 11380
+ER_KEYRING_OKV_FAILED_TO_GENERATE_KEY_DUE_TO_INTERNAL_ERROR = 11381
+ER_KEYRING_OKV_FAILED_TO_FIND_SERVER_ENTRY = 11382
+ER_KEYRING_OKV_FAILED_TO_FIND_STANDBY_SERVER_ENTRY = 11383
+ER_KEYRING_OKV_FAILED_TO_PARSE_CONF_FILE = 11384
+ER_KEYRING_OKV_FAILED_TO_LOAD_KEY_UID = 11385
+ER_KEYRING_OKV_FAILED_TO_INIT_SSL_LAYER = 11386
+ER_KEYRING_OKV_FAILED_TO_INIT_CLIENT = 11387
+ER_KEYRING_OKV_CONNECTION_TO_SERVER_FAILED = 11388
+ER_KEYRING_OKV_FAILED_TO_REMOVE_KEY = 11389
+ER_KEYRING_OKV_FAILED_TO_ADD_ATTRIBUTE = 11390
+ER_KEYRING_OKV_FAILED_TO_GENERATE_KEY = 11391
+ER_KEYRING_OKV_FAILED_TO_STORE_KEY = 11392
+ER_KEYRING_OKV_FAILED_TO_ACTIVATE_KEYS = 11393
+ER_KEYRING_OKV_FAILED_TO_FETCH_KEY = 11394
+ER_KEYRING_OKV_FAILED_TO_STORE_OR_GENERATE_KEY = 11395
+ER_KEYRING_OKV_FAILED_TO_RETRIEVE_KEY_SIGNATURE = 11396
+ER_KEYRING_OKV_FAILED_TO_RETRIEVE_KEY = 11397
+ER_KEYRING_OKV_FAILED_TO_LOAD_SSL_TRUST_STORE = 11398
+ER_KEYRING_OKV_FAILED_TO_SET_CERTIFICATE_FILE = 11399
+ER_KEYRING_OKV_FAILED_TO_SET_KEY_FILE = 11400
+ER_KEYRING_OKV_KEY_MISMATCH = 11401
+ER_KEYRING_ENCRYPTED_FILE_INCORRECT_KEYRING_FILE = 11402
+ER_KEYRING_ENCRYPTED_FILE_DECRYPTION_FAILED = 11403
+ER_KEYRING_ENCRYPTED_FILE_FOUND_MALFORMED_BACKUP_FILE = 11404
+ER_KEYRING_ENCRYPTED_FILE_FAILED_TO_RESTORE_KEYRING = 11405
+ER_KEYRING_ENCRYPTED_FILE_FAILED_TO_FLUSH_KEYRING = 11406
+ER_KEYRING_ENCRYPTED_FILE_ENCRYPTION_FAILED = 11407
+ER_KEYRING_ENCRYPTED_FILE_INVALID_KEYRING_DIR = 11408
+ER_KEYRING_ENCRYPTED_FILE_FAILED_TO_CREATE_KEYRING_DIR = 11409
+ER_KEYRING_ENCRYPTED_FILE_PASSWORD_IS_INVALID = 11410
+ER_KEYRING_ENCRYPTED_FILE_PASSWORD_IS_TOO_LONG = 11411
+ER_KEYRING_ENCRYPTED_FILE_INIT_FAILURE = 11412
+ER_KEYRING_ENCRYPTED_FILE_INIT_FAILED_DUE_TO_INTERNAL_ERROR = 11413
+ER_KEYRING_ENCRYPTED_FILE_GEN_KEY_FAILED_DUE_TO_INTERNAL_ERROR = 11414
+ER_KEYRING_AWS_FAILED_TO_SET_CMK_ID = 11415
+ER_KEYRING_AWS_FAILED_TO_SET_REGION = 11416
+ER_KEYRING_AWS_FAILED_TO_OPEN_CONF_FILE = 11417
+ER_KEYRING_AWS_FAILED_TO_ACCESS_KEY_ID_FROM_CONF_FILE = 11418
+ER_KEYRING_AWS_FAILED_TO_ACCESS_KEY_FROM_CONF_FILE = 11419
+ER_KEYRING_AWS_INVALID_CONF_FILE_PATH = 11420
+ER_KEYRING_AWS_INVALID_DATA_FILE_PATH = 11421
+ER_KEYRING_AWS_FAILED_TO_ACCESS_OR_CREATE_KEYRING_DIR = 11422
+ER_KEYRING_AWS_FAILED_TO_ACCESS_OR_CREATE_KEYRING_DATA_FILE = 11423
+ER_KEYRING_AWS_FAILED_TO_INIT_DUE_TO_INTERNAL_ERROR = 11424
+ER_KEYRING_AWS_FAILED_TO_ACCESS_DATA_FILE = 11425
+ER_KEYRING_AWS_CMK_ID_NOT_SET = 11426
+ER_KEYRING_AWS_FAILED_TO_GET_KMS_CREDENTIAL_FROM_CONF_FILE = 11427
+ER_KEYRING_AWS_INIT_FAILURE = 11428
+ER_KEYRING_AWS_FAILED_TO_INIT_DUE_TO_PLUGIN_INTERNAL_ERROR = 11429
+ER_KEYRING_AWS_INVALID_KEY_LENGTH_FOR_CIPHER = 11430
+ER_KEYRING_AWS_FAILED_TO_GENERATE_KEY_DUE_TO_INTERNAL_ERROR = 11431
+ER_KEYRING_AWS_INCORRECT_FILE = 11432
+ER_KEYRING_AWS_FOUND_MALFORMED_BACKUP_FILE = 11433
+ER_KEYRING_AWS_FAILED_TO_RESTORE_FROM_BACKUP_FILE = 11434
+ER_KEYRING_AWS_FAILED_TO_FLUSH_KEYRING_TO_FILE = 11435
+ER_KEYRING_AWS_INCORRECT_REGION = 11436
+ER_KEYRING_AWS_FAILED_TO_CONNECT_KMS = 11437
+ER_KEYRING_AWS_FAILED_TO_GENERATE_NEW_KEY = 11438
+ER_KEYRING_AWS_FAILED_TO_ENCRYPT_KEY = 11439
+ER_KEYRING_AWS_FAILED_TO_RE_ENCRYPT_KEY = 11440
+ER_KEYRING_AWS_FAILED_TO_DECRYPT_KEY = 11441
+ER_KEYRING_AWS_FAILED_TO_ROTATE_CMK = 11442
+ER_GRP_RPL_GTID_ALREADY_USED = 11443
+ER_GRP_RPL_APPLIER_THD_KILLED = 11444
+ER_GRP_RPL_EVENT_HANDLING_ERROR = 11445
+ER_GRP_RPL_ERROR_GTID_EXECUTION_INFO = 11446
+ER_GRP_RPL_CERTIFICATE_SIZE_ERROR = 11447
+ER_GRP_RPL_CREATE_APPLIER_CACHE_ERROR = 11448
+ER_GRP_RPL_UNBLOCK_WAITING_THD = 11449
+ER_GRP_RPL_APPLIER_PIPELINE_NOT_DISPOSED = 11450
+ER_GRP_RPL_APPLIER_THD_EXECUTION_ABORTED = 11451
+ER_GRP_RPL_APPLIER_EXECUTION_FATAL_ERROR = 11452
+ER_GRP_RPL_ERROR_STOPPING_CHANNELS = 11453
+ER_GRP_RPL_ERROR_SENDING_SINGLE_PRIMARY_MSSG = 11454
+ER_GRP_RPL_UPDATE_TRANS_SNAPSHOT_VER_ERROR = 11455
+ER_GRP_RPL_SIDNO_FETCH_ERROR = 11456
+ER_GRP_RPL_BROADCAST_COMMIT_TRANS_MSSG_FAILED = 11457
+ER_GRP_RPL_GROUP_NAME_PARSE_ERROR = 11458
+ER_GRP_RPL_ADD_GRPSID_TO_GRPGTIDSID_MAP_ERROR = 11459
+ER_GRP_RPL_UPDATE_GRPGTID_EXECUTED_ERROR = 11460
+ER_GRP_RPL_DONOR_TRANS_INFO_ERROR = 11461
+ER_GRP_RPL_SERVER_CONN_ERROR = 11462
+ER_GRP_RPL_ERROR_FETCHING_GTID_EXECUTED_SET = 11463
+ER_GRP_RPL_ADD_GTID_TO_GRPGTID_EXECUTED_ERROR = 11464
+ER_GRP_RPL_ERROR_FETCHING_GTID_SET = 11465
+ER_GRP_RPL_ADD_RETRIEVED_SET_TO_GRP_GTID_EXECUTED_ERROR = 11466
+ER_GRP_RPL_CERTIFICATION_INITIALIZATION_FAILURE = 11467
+ER_GRP_RPL_UPDATE_LAST_CONFLICT_FREE_TRANS_ERROR = 11468
+ER_GRP_RPL_UPDATE_TRANS_SNAPSHOT_REF_VER_ERROR = 11469
+ER_GRP_RPL_FETCH_TRANS_SIDNO_ERROR = 11470
+ER_GRP_RPL_ERROR_VERIFYING_SIDNO = 11471
+ER_GRP_RPL_CANT_GENERATE_GTID = 11472
+ER_GRP_RPL_INVALID_GTID_SET = 11473
+ER_GRP_RPL_UPDATE_GTID_SET_ERROR = 11474
+ER_GRP_RPL_RECEIVED_SET_MISSING_GTIDS = 11475
+ER_GRP_RPL_SKIP_COMPUTATION_TRANS_COMMITTED = 11476
+ER_GRP_RPL_NULL_PACKET = 11477
+ER_GRP_RPL_CANT_READ_GTID = 11478
+ER_GRP_RPL_PROCESS_GTID_SET_ERROR = 11479
+ER_GRP_RPL_PROCESS_INTERSECTION_GTID_SET_ERROR = 11480
+ER_GRP_RPL_SET_STABLE_TRANS_ERROR = 11481
+ER_GRP_RPL_CANT_READ_GRP_GTID_EXTRACTED = 11482
+ER_GRP_RPL_CANT_READ_WRITE_SET_ITEM = 11483
+ER_GRP_RPL_INIT_CERTIFICATION_INFO_FAILURE = 11484
+ER_GRP_RPL_CONFLICT_DETECTION_DISABLED = 11485
+ER_GRP_RPL_MSG_DISCARDED = 11486
+ER_GRP_RPL_MISSING_GRP_RPL_APPLIER = 11487
+ER_GRP_RPL_CERTIFIER_MSSG_PROCESS_ERROR = 11488
+ER_GRP_RPL_SRV_NOT_ONLINE = 11489
+ER_GRP_RPL_SRV_ONLINE = 11490
+ER_GRP_RPL_DISABLE_SRV_READ_MODE_RESTRICTED = 11491
+ER_GRP_RPL_MEM_ONLINE = 11492
+ER_GRP_RPL_MEM_UNREACHABLE = 11493
+ER_GRP_RPL_MEM_REACHABLE = 11494
+ER_GRP_RPL_SRV_BLOCKED = 11495
+ER_GRP_RPL_SRV_BLOCKED_FOR_SECS = 11496
+ER_GRP_RPL_CHANGE_GRP_MEM_NOT_PROCESSED = 11497
+ER_GRP_RPL_MEMBER_CONTACT_RESTORED = 11498
+ER_GRP_RPL_MEMBER_REMOVED = 11499
+ER_GRP_RPL_PRIMARY_MEMBER_LEFT_GRP = 11500
+ER_GRP_RPL_MEMBER_ADDED = 11501
+ER_GRP_RPL_MEMBER_EXIT_PLUGIN_ERROR = 11502
+ER_GRP_RPL_MEMBER_CHANGE = 11503
+ER_GRP_RPL_MEMBER_LEFT_GRP = 11504
+ER_GRP_RPL_MEMBER_EXPELLED = 11505
+ER_GRP_RPL_SESSION_OPEN_FAILED = 11506
+ER_GRP_RPL_NEW_PRIMARY_ELECTED = 11507
+ER_GRP_RPL_DISABLE_READ_ONLY_FAILED = 11508
+ER_GRP_RPL_ENABLE_READ_ONLY_FAILED = 11509
+ER_GRP_RPL_SRV_PRIMARY_MEM = 11510
+ER_GRP_RPL_SRV_SECONDARY_MEM = 11511
+ER_GRP_RPL_NO_SUITABLE_PRIMARY_MEM = 11512
+ER_GRP_RPL_SUPER_READ_ONLY_ACTIVATE_ERROR = 11513
+ER_GRP_RPL_EXCEEDS_AUTO_INC_VALUE = 11514
+ER_GRP_RPL_DATA_NOT_PROVIDED_BY_MEM = 11515
+ER_GRP_RPL_MEMBER_ALREADY_EXISTS = 11516
+ER_GRP_RPL_GRP_CHANGE_INFO_EXTRACT_ERROR = 11517
+ER_GRP_RPL_GTID_EXECUTED_EXTRACT_ERROR = 11518
+ER_GRP_RPL_GTID_SET_EXTRACT_ERROR = 11519
+ER_GRP_RPL_START_FAILED = 11520
+ER_GRP_RPL_MEMBER_VER_INCOMPATIBLE = 11521
+ER_GRP_RPL_TRANS_NOT_PRESENT_IN_GRP = 11522
+ER_GRP_RPL_TRANS_GREATER_THAN_GRP = 11523
+ER_GRP_RPL_MEMBER_VERSION_LOWER_THAN_GRP = 11524
+ER_GRP_RPL_LOCAL_GTID_SETS_PROCESS_ERROR = 11525
+ER_GRP_RPL_MEMBER_TRANS_GREATER_THAN_GRP = 11526
+ER_GRP_RPL_BLOCK_SIZE_DIFF_FROM_GRP = 11527
+ER_GRP_RPL_TRANS_WRITE_SET_EXTRACT_DIFF_FROM_GRP = 11528
+ER_GRP_RPL_MEMBER_CFG_INCOMPATIBLE_WITH_GRP_CFG = 11529
+ER_GRP_RPL_MEMBER_STOP_RPL_CHANNELS_ERROR = 11530
+ER_GRP_RPL_PURGE_APPLIER_LOGS = 11531
+ER_GRP_RPL_RESET_APPLIER_MODULE_LOGS_ERROR = 11532
+ER_GRP_RPL_APPLIER_THD_SETUP_ERROR = 11533
+ER_GRP_RPL_APPLIER_THD_START_ERROR = 11534
+ER_GRP_RPL_APPLIER_THD_STOP_ERROR = 11535
+ER_GRP_RPL_FETCH_TRANS_DATA_FAILED = 11536
+ER_GRP_RPL_SLAVE_IO_THD_PRIMARY_UNKNOWN = 11537
+ER_GRP_RPL_SALVE_IO_THD_ON_SECONDARY_MEMBER = 11538
+ER_GRP_RPL_SLAVE_SQL_THD_PRIMARY_UNKNOWN = 11539
+ER_GRP_RPL_SLAVE_SQL_THD_ON_SECONDARY_MEMBER = 11540
+ER_GRP_RPL_NEEDS_INNODB_TABLE = 11541
+ER_GRP_RPL_PRIMARY_KEY_NOT_DEFINED = 11542
+ER_GRP_RPL_FK_WITH_CASCADE_UNSUPPORTED = 11543
+ER_GRP_RPL_AUTO_INC_RESET = 11544
+ER_GRP_RPL_AUTO_INC_OFFSET_RESET = 11545
+ER_GRP_RPL_AUTO_INC_SET = 11546
+ER_GRP_RPL_AUTO_INC_OFFSET_SET = 11547
+ER_GRP_RPL_FETCH_TRANS_CONTEXT_FAILED = 11548
+ER_GRP_RPL_FETCH_FORMAT_DESC_LOG_EVENT_FAILED = 11549
+ER_GRP_RPL_FETCH_TRANS_CONTEXT_LOG_EVENT_FAILED = 11550
+ER_GRP_RPL_FETCH_SNAPSHOT_VERSION_FAILED = 11551
+ER_GRP_RPL_FETCH_GTID_LOG_EVENT_FAILED = 11552
+ER_GRP_RPL_UPDATE_SERV_CERTIFICATE_FAILED = 11553
+ER_GRP_RPL_ADD_GTID_INFO_WITH_LOCAL_GTID_FAILED = 11554
+ER_GRP_RPL_ADD_GTID_INFO_WITHOUT_LOCAL_GTID_FAILED = 11555
+ER_GRP_RPL_NOTIFY_CERTIFICATION_OUTCOME_FAILED = 11556
+ER_GRP_RPL_ADD_GTID_INFO_WITH_REMOTE_GTID_FAILED = 11557
+ER_GRP_RPL_ADD_GTID_INFO_WITHOUT_REMOTE_GTID_FAILED = 11558
+ER_GRP_RPL_FETCH_VIEW_CHANGE_LOG_EVENT_FAILED = 11559
+ER_GRP_RPL_CONTACT_WITH_SRV_FAILED = 11560
+ER_GRP_RPL_SRV_WAIT_TIME_OUT = 11561
+ER_GRP_RPL_FETCH_LOG_EVENT_FAILED = 11562
+ER_GRP_RPL_START_GRP_RPL_FAILED = 11563
+ER_GRP_RPL_CONN_INTERNAL_PLUGIN_FAIL = 11564
+ER_GRP_RPL_SUPER_READ_ON = 11565
+ER_GRP_RPL_SUPER_READ_OFF = 11566
+ER_GRP_RPL_KILLED_SESSION_ID = 11567
+ER_GRP_RPL_KILLED_FAILED_ID = 11568
+ER_GRP_RPL_INTERNAL_QUERY = 11569
+ER_GRP_RPL_COPY_FROM_EMPTY_STRING = 11570
+ER_GRP_RPL_QUERY_FAIL = 11571
+ER_GRP_RPL_CREATE_SESSION_UNABLE = 11572
+ER_GRP_RPL_MEMBER_NOT_FOUND = 11573
+ER_GRP_RPL_MAXIMUM_CONNECTION_RETRIES_REACHED = 11574
+ER_GRP_RPL_ALL_DONORS_LEFT_ABORT_RECOVERY = 11575
+ER_GRP_RPL_ESTABLISH_RECOVERY_WITH_DONOR = 11576
+ER_GRP_RPL_ESTABLISH_RECOVERY_WITH_ANOTHER_DONOR = 11577
+ER_GRP_RPL_NO_VALID_DONOR = 11578
+ER_GRP_RPL_CONFIG_RECOVERY = 11579
+ER_GRP_RPL_ESTABLISHING_CONN_GRP_REC_DONOR = 11580
+ER_GRP_RPL_CREATE_GRP_RPL_REC_CHANNEL = 11581
+ER_GRP_RPL_DONOR_SERVER_CONN = 11582
+ER_GRP_RPL_CHECK_STATUS_TABLE = 11583
+ER_GRP_RPL_STARTING_GRP_REC = 11584
+ER_GRP_RPL_DONOR_CONN_TERMINATION = 11585
+ER_GRP_RPL_STOPPING_GRP_REC = 11586
+ER_GRP_RPL_PURGE_REC = 11587
+ER_GRP_RPL_UNABLE_TO_KILL_CONN_REC_DONOR_APPLIER = 11588
+ER_GRP_RPL_UNABLE_TO_KILL_CONN_REC_DONOR_FAILOVER = 11589
+ER_GRP_RPL_FAILED_TO_NOTIFY_GRP_MEMBERSHIP_EVENT = 11590
+ER_GRP_RPL_FAILED_TO_BROADCAST_GRP_MEMBERSHIP_NOTIFICATION = 11591
+ER_GRP_RPL_FAILED_TO_BROADCAST_MEMBER_STATUS_NOTIFICATION = 11592
+ER_GRP_RPL_OOM_FAILED_TO_GENERATE_IDENTIFICATION_HASH = 11593
+ER_GRP_RPL_WRITE_IDENT_HASH_BASE64_ENCODING_FAILED = 11594
+ER_GRP_RPL_INVALID_BINLOG_FORMAT = 11595
+ER_GRP_RPL_BINLOG_CHECKSUM_SET = 11596
+ER_GRP_RPL_TRANS_WRITE_SET_EXTRACTION_NOT_SET = 11597
+ER_GRP_RPL_UNSUPPORTED_TRANS_ISOLATION = 11598
+ER_GRP_RPL_CANNOT_EXECUTE_TRANS_WHILE_STOPPING = 11599
+ER_GRP_RPL_CANNOT_EXECUTE_TRANS_WHILE_RECOVERING = 11600
+ER_GRP_RPL_CANNOT_EXECUTE_TRANS_IN_ERROR_STATE = 11601
+ER_GRP_RPL_CANNOT_EXECUTE_TRANS_IN_OFFLINE_MODE = 11602
+ER_GRP_RPL_MULTIPLE_CACHE_TYPE_NOT_SUPPORTED_FOR_SESSION = 11603
+ER_GRP_RPL_FAILED_TO_REINIT_BINLOG_CACHE_FOR_READ = 11604
+ER_GRP_RPL_FAILED_TO_CREATE_TRANS_CONTEXT = 11605
+ER_GRP_RPL_FAILED_TO_EXTRACT_TRANS_WRITE_SET = 11606
+ER_GRP_RPL_FAILED_TO_GATHER_TRANS_WRITE_SET = 11607
+ER_GRP_RPL_TRANS_SIZE_EXCEEDS_LIMIT = 11608
+ER_GRP_RPL_REINIT_OF_INTERNAL_CACHE_FOR_READ_FAILED = 11609
+ER_GRP_RPL_APPENDING_DATA_TO_INTERNAL_CACHE_FAILED = 11610
+ER_GRP_RPL_WRITE_TO_BINLOG_CACHE_FAILED = 11611
+ER_GRP_RPL_FAILED_TO_REGISTER_TRANS_OUTCOME_NOTIFICTION = 11612
+ER_GRP_RPL_MSG_TOO_LONG_BROADCASTING_TRANS_FAILED = 11613
+ER_GRP_RPL_BROADCASTING_TRANS_TO_GRP_FAILED = 11614
+ER_GRP_RPL_ERROR_WHILE_WAITING_FOR_CONFLICT_DETECTION = 11615
+ER_GRP_RPL_REINIT_OF_INTERNAL_CACHE_FOR_WRITE_FAILED = 11616
+ER_GRP_RPL_FAILED_TO_CREATE_COMMIT_CACHE = 11617
+ER_GRP_RPL_REINIT_OF_COMMIT_CACHE_FOR_WRITE_FAILED = 11618
+ER_GRP_RPL_PREV_REC_SESSION_RUNNING = 11619
+ER_GRP_RPL_FATAL_REC_PROCESS = 11620
+ER_GRP_RPL_WHILE_STOPPING_REP_CHANNEL = 11621
+ER_GRP_RPL_UNABLE_TO_EVALUATE_APPLIER_STATUS = 11622
+ER_GRP_RPL_ONLY_ONE_SERVER_ALIVE = 11623
+ER_GRP_RPL_CERTIFICATION_REC_PROCESS = 11624
+ER_GRP_RPL_UNABLE_TO_ENSURE_EXECUTION_REC = 11625
+ER_GRP_RPL_WHILE_SENDING_MSG_REC = 11626
+ER_GRP_RPL_READ_UNABLE_FOR_SUPER_READ_ONLY = 11627
+ER_GRP_RPL_READ_UNABLE_FOR_READ_ONLY_SUPER_READ_ONLY = 11628
+ER_GRP_RPL_UNABLE_TO_RESET_SERVER_READ_MODE = 11629
+ER_GRP_RPL_UNABLE_TO_CERTIFY_PLUGIN_TRANS = 11630
+ER_GRP_RPL_UNBLOCK_CERTIFIED_TRANS = 11631
+ER_GRP_RPL_SERVER_WORKING_AS_SECONDARY = 11632
+ER_GRP_RPL_FAILED_TO_START_WITH_INVALID_SERVER_ID = 11633
+ER_GRP_RPL_FORCE_MEMBERS_MUST_BE_EMPTY = 11634
+ER_GRP_RPL_PLUGIN_STRUCT_INIT_NOT_POSSIBLE_ON_SERVER_START = 11635
+ER_GRP_RPL_FAILED_TO_ENABLE_SUPER_READ_ONLY_MODE = 11636
+ER_GRP_RPL_FAILED_TO_INIT_COMMUNICATION_ENGINE = 11637
+ER_GRP_RPL_FAILED_TO_START_ON_SECONDARY_WITH_ASYNC_CHANNELS = 11638
+ER_GRP_RPL_FAILED_TO_START_COMMUNICATION_ENGINE = 11639
+ER_GRP_RPL_TIMEOUT_ON_VIEW_AFTER_JOINING_GRP = 11640
+ER_GRP_RPL_FAILED_TO_CALL_GRP_COMMUNICATION_INTERFACE = 11641
+ER_GRP_RPL_MEMBER_SERVER_UUID_IS_INCOMPATIBLE_WITH_GRP = 11642
+ER_GRP_RPL_MEMBER_CONF_INFO = 11643
+ER_GRP_RPL_FAILED_TO_CONFIRM_IF_SERVER_LEFT_GRP = 11644
+ER_GRP_RPL_SERVER_IS_ALREADY_LEAVING = 11645
+ER_GRP_RPL_SERVER_ALREADY_LEFT = 11646
+ER_GRP_RPL_WAITING_FOR_VIEW_UPDATE = 11647
+ER_GRP_RPL_TIMEOUT_RECEIVING_VIEW_CHANGE_ON_SHUTDOWN = 11648
+ER_GRP_RPL_REQUESTING_NON_MEMBER_SERVER_TO_LEAVE = 11649
+ER_GRP_RPL_IS_STOPPING = 11650
+ER_GRP_RPL_IS_STOPPED = 11651
+ER_GRP_RPL_FAILED_TO_ENABLE_READ_ONLY_MODE_ON_SHUTDOWN = 11652
+ER_GRP_RPL_RECOVERY_MODULE_TERMINATION_TIMED_OUT_ON_SHUTDOWN = 11653
+ER_GRP_RPL_APPLIER_TERMINATION_TIMED_OUT_ON_SHUTDOWN = 11654
+ER_GRP_RPL_FAILED_TO_SHUTDOWN_REGISTRY_MODULE = 11655
+ER_GRP_RPL_FAILED_TO_INIT_HANDLER = 11656
+ER_GRP_RPL_FAILED_TO_REGISTER_SERVER_STATE_OBSERVER = 11657
+ER_GRP_RPL_FAILED_TO_REGISTER_TRANS_STATE_OBSERVER = 11658
+ER_GRP_RPL_FAILED_TO_REGISTER_BINLOG_STATE_OBSERVER = 11659
+ER_GRP_RPL_FAILED_TO_START_ON_BOOT = 11660
+ER_GRP_RPL_FAILED_TO_STOP_ON_PLUGIN_UNINSTALL = 11661
+ER_GRP_RPL_FAILED_TO_UNREGISTER_SERVER_STATE_OBSERVER = 11662
+ER_GRP_RPL_FAILED_TO_UNREGISTER_TRANS_STATE_OBSERVER = 11663
+ER_GRP_RPL_FAILED_TO_UNREGISTER_BINLOG_STATE_OBSERVER = 11664
+ER_GRP_RPL_ALL_OBSERVERS_UNREGISTERED = 11665
+ER_GRP_RPL_FAILED_TO_PARSE_THE_GRP_NAME = 11666
+ER_GRP_RPL_FAILED_TO_GENERATE_SIDNO_FOR_GRP = 11667
+ER_GRP_RPL_APPLIER_NOT_STARTED_DUE_TO_RUNNING_PREV_SHUTDOWN = 11668
+ER_GRP_RPL_FAILED_TO_INIT_APPLIER_MODULE = 11669
+ER_GRP_RPL_APPLIER_INITIALIZED = 11670
+ER_GRP_RPL_COMMUNICATION_SSL_CONF_INFO = 11671
+ER_GRP_RPL_ABORTS_AS_SSL_NOT_SUPPORTED_BY_MYSQLD = 11672
+ER_GRP_RPL_SSL_DISABLED = 11673
+ER_GRP_RPL_UNABLE_TO_INIT_COMMUNICATION_ENGINE = 11674
+ER_GRP_RPL_BINLOG_DISABLED = 11675
+ER_GRP_RPL_GTID_MODE_OFF = 11676
+ER_GRP_RPL_LOG_SLAVE_UPDATES_NOT_SET = 11677
+ER_GRP_RPL_INVALID_TRANS_WRITE_SET_EXTRACTION_VALUE = 11678
+ER_GRP_RPL_RELAY_LOG_INFO_REPO_MUST_BE_TABLE = 11679
+ER_GRP_RPL_MASTER_INFO_REPO_MUST_BE_TABLE = 11680
+ER_GRP_RPL_INCORRECT_TYPE_SET_FOR_PARALLEL_APPLIER = 11681
+ER_GRP_RPL_SLAVE_PRESERVE_COMMIT_ORDER_NOT_SET = 11682
+ER_GRP_RPL_SINGLE_PRIM_MODE_NOT_ALLOWED_WITH_UPDATE_EVERYWHERE = 11683
+ER_GRP_RPL_MODULE_TERMINATE_ERROR = 11684
+ER_GRP_RPL_GRP_NAME_OPTION_MANDATORY = 11685
+ER_GRP_RPL_GRP_NAME_IS_TOO_LONG = 11686
+ER_GRP_RPL_GRP_NAME_IS_NOT_VALID_UUID = 11687
+ER_GRP_RPL_FLOW_CTRL_MIN_QUOTA_GREATER_THAN_MAX_QUOTA = 11688
+ER_GRP_RPL_FLOW_CTRL_MIN_RECOVERY_QUOTA_GREATER_THAN_MAX_QUOTA = 11689
+ER_GRP_RPL_FLOW_CTRL_MAX_QUOTA_SMALLER_THAN_MIN_QUOTAS = 11690
+ER_GRP_RPL_INVALID_SSL_RECOVERY_STRING = 11691
+ER_GRP_RPL_SUPPORTS_ONLY_ONE_FORCE_MEMBERS_SET = 11692
+ER_GRP_RPL_FORCE_MEMBERS_SET_UPDATE_NOT_ALLOWED = 11693
+ER_GRP_RPL_GRP_COMMUNICATION_INIT_WITH_CONF = 11694
+ER_GRP_RPL_UNKNOWN_GRP_RPL_APPLIER_PIPELINE_REQUESTED = 11695
+ER_GRP_RPL_FAILED_TO_BOOTSTRAP_EVENT_HANDLING_INFRASTRUCTURE = 11696
+ER_GRP_RPL_APPLIER_HANDLER_NOT_INITIALIZED = 11697
+ER_GRP_RPL_APPLIER_HANDLER_IS_IN_USE = 11698
+ER_GRP_RPL_APPLIER_HANDLER_ROLE_IS_IN_USE = 11699
+ER_GRP_RPL_FAILED_TO_INIT_APPLIER_HANDLER = 11700
+ER_GRP_RPL_SQL_SERVICE_FAILED_TO_INIT_SESSION_THREAD = 11701
+ER_GRP_RPL_SQL_SERVICE_COMM_SESSION_NOT_INITIALIZED = 11702
+ER_GRP_RPL_SQL_SERVICE_SERVER_SESSION_KILLED = 11703
+ER_GRP_RPL_SQL_SERVICE_FAILED_TO_RUN_SQL_QUERY = 11704
+ER_GRP_RPL_SQL_SERVICE_SERVER_INTERNAL_FAILURE = 11705
+ER_GRP_RPL_SQL_SERVICE_RETRIES_EXCEEDED_ON_SESSION_STATE = 11706
+ER_GRP_RPL_SQL_SERVICE_FAILED_TO_FETCH_SECURITY_CTX = 11707
+ER_GRP_RPL_SQL_SERVICE_SERVER_ACCESS_DENIED_FOR_USER = 11708
+ER_GRP_RPL_SQL_SERVICE_MAX_CONN_ERROR_FROM_SERVER = 11709
+ER_GRP_RPL_SQL_SERVICE_SERVER_ERROR_ON_CONN = 11710
+ER_GRP_RPL_UNREACHABLE_MAJORITY_TIMEOUT_FOR_MEMBER = 11711
+ER_GRP_RPL_SERVER_SET_TO_READ_ONLY_DUE_TO_ERRORS = 11712
+ER_GRP_RPL_GMS_LISTENER_FAILED_TO_LOG_NOTIFICATION = 11713
+ER_GRP_RPL_GRP_COMMUNICATION_ENG_INIT_FAILED = 11714
+ER_GRP_RPL_SET_GRP_COMMUNICATION_ENG_LOGGER_FAILED = 11715
+ER_GRP_RPL_DEBUG_OPTIONS = 11716
+ER_GRP_RPL_INVALID_DEBUG_OPTIONS = 11717
+ER_GRP_RPL_EXIT_GRP_GCS_ERROR = 11718
+ER_GRP_RPL_GRP_MEMBER_OFFLINE = 11719
+ER_GRP_RPL_GCS_INTERFACE_ERROR = 11720
+ER_GRP_RPL_FORCE_MEMBER_VALUE_SET_ERROR = 11721
+ER_GRP_RPL_FORCE_MEMBER_VALUE_SET = 11722
+ER_GRP_RPL_FORCE_MEMBER_VALUE_TIME_OUT = 11723
+ER_GRP_RPL_BROADCAST_COMMIT_MSSG_TOO_BIG = 11724
+ER_GRP_RPL_SEND_STATS_ERROR = 11725
+ER_GRP_RPL_MEMBER_STATS_INFO = 11726
+ER_GRP_RPL_FLOW_CONTROL_STATS = 11727
+ER_GRP_RPL_UNABLE_TO_CONVERT_PACKET_TO_EVENT = 11728
+ER_GRP_RPL_PIPELINE_CREATE_FAILED = 11729
+ER_GRP_RPL_PIPELINE_REINIT_FAILED_WRITE = 11730
+ER_GRP_RPL_UNABLE_TO_CONVERT_EVENT_TO_PACKET = 11731
+ER_GRP_RPL_PIPELINE_FLUSH_FAIL = 11732
+ER_GRP_RPL_PIPELINE_REINIT_FAILED_READ = 11733
+ER_GRP_RPL_STOP_REP_CHANNEL = 11734
+ER_GRP_RPL_GCS_GR_ERROR_MSG = 11735
+ER_GRP_RPL_SLAVE_IO_THREAD_UNBLOCKED = 11736
+ER_GRP_RPL_SLAVE_IO_THREAD_ERROR_OUT = 11737
+ER_GRP_RPL_SLAVE_APPLIER_THREAD_UNBLOCKED = 11738
+ER_GRP_RPL_SLAVE_APPLIER_THREAD_ERROR_OUT = 11739
+ER_LDAP_AUTH_FAILED_TO_CREATE_OR_GET_CONNECTION = 11740
+ER_LDAP_AUTH_DEINIT_FAILED = 11741
+ER_LDAP_AUTH_SKIPPING_USER_GROUP_SEARCH = 11742
+ER_LDAP_AUTH_POOL_DISABLE_MAX_SIZE_ZERO = 11743
+ER_LDAP_AUTH_FAILED_TO_CREATE_LDAP_OBJECT_CREATOR = 11744
+ER_LDAP_AUTH_FAILED_TO_CREATE_LDAP_OBJECT = 11745
+ER_LDAP_AUTH_TLS_CONF = 11746
+ER_LDAP_AUTH_TLS_CONNECTION = 11747
+ER_LDAP_AUTH_CONN_POOL_NOT_CREATED = 11748
+ER_LDAP_AUTH_CONN_POOL_INITIALIZING = 11749
+ER_LDAP_AUTH_CONN_POOL_DEINITIALIZING = 11750
+ER_LDAP_AUTH_ZERO_MAX_POOL_SIZE_UNCHANGED = 11751
+ER_LDAP_AUTH_POOL_REINITIALIZING = 11752
+ER_LDAP_AUTH_FAILED_TO_WRITE_PACKET = 11753
+ER_LDAP_AUTH_SETTING_USERNAME = 11754
+ER_LDAP_AUTH_USER_AUTH_DATA = 11755
+ER_LDAP_AUTH_INFO_FOR_USER = 11756
+ER_LDAP_AUTH_USER_GROUP_SEARCH_INFO = 11757
+ER_LDAP_AUTH_GRP_SEARCH_SPECIAL_HDL = 11758
+ER_LDAP_AUTH_GRP_IS_FULL_DN = 11759
+ER_LDAP_AUTH_USER_NOT_FOUND_IN_ANY_GRP = 11760
+ER_LDAP_AUTH_USER_FOUND_IN_MANY_GRPS = 11761
+ER_LDAP_AUTH_USER_HAS_MULTIPLE_GRP_NAMES = 11762
+ER_LDAP_AUTH_SEARCHED_USER_GRP_NAME = 11763
+ER_LDAP_AUTH_OBJECT_CREATE_TIMESTAMP = 11764
+ER_LDAP_AUTH_CERTIFICATE_NAME = 11765
+ER_LDAP_AUTH_FAILED_TO_POOL_DEINIT = 11766
+ER_LDAP_AUTH_FAILED_TO_INITIALIZE_POOL_IN_RECONSTRUCTING = 11767
+ER_LDAP_AUTH_FAILED_TO_INITIALIZE_POOL_IN_INIT_STATE = 11768
+ER_LDAP_AUTH_FAILED_TO_INITIALIZE_POOL_IN_DEINIT_STATE = 11769
+ER_LDAP_AUTH_FAILED_TO_DEINITIALIZE_POOL_IN_RECONSTRUCT_STATE = 11770
+ER_LDAP_AUTH_FAILED_TO_DEINITIALIZE_NOT_READY_POOL = 11771
+ER_LDAP_AUTH_FAILED_TO_GET_CONNECTION_AS_PLUGIN_NOT_READY = 11772
+ER_LDAP_AUTH_CONNECTION_POOL_INIT_FAILED = 11773
+ER_LDAP_AUTH_MAX_ALLOWED_CONNECTION_LIMIT_HIT = 11774
+ER_LDAP_AUTH_MAX_POOL_SIZE_SET_FAILED = 11775
+ER_LDAP_AUTH_PLUGIN_FAILED_TO_READ_PACKET = 11776
+ER_LDAP_AUTH_CREATING_LDAP_CONNECTION = 11777
+ER_LDAP_AUTH_GETTING_CONNECTION_FROM_POOL = 11778
+ER_LDAP_AUTH_RETURNING_CONNECTION_TO_POOL = 11779
+ER_LDAP_AUTH_SEARCH_USER_GROUP_ATTR_NOT_FOUND = 11780
+ER_LDAP_AUTH_LDAP_INFO_NULL = 11781
+ER_LDAP_AUTH_FREEING_CONNECTION = 11782
+ER_LDAP_AUTH_CONNECTION_PUSHED_TO_POOL = 11783
+ER_LDAP_AUTH_CONNECTION_CREATOR_ENTER = 11784
+ER_LDAP_AUTH_STARTING_TLS = 11785
+ER_LDAP_AUTH_CONNECTION_GET_LDAP_INFO_NULL = 11786
+ER_LDAP_AUTH_DELETING_CONNECTION_KEY = 11787
+ER_LDAP_AUTH_POOLED_CONNECTION_KEY = 11788
+ER_LDAP_AUTH_CREATE_CONNECTION_KEY = 11789
+ER_LDAP_AUTH_COMMUNICATION_HOST_INFO = 11790
+ER_LDAP_AUTH_METHOD_TO_CLIENT = 11791
+ER_LDAP_AUTH_SASL_REQUEST_FROM_CLIENT = 11792
+ER_LDAP_AUTH_SASL_PROCESS_SASL = 11793
+ER_LDAP_AUTH_SASL_BIND_SUCCESS_INFO = 11794
+ER_LDAP_AUTH_STARTED_FOR_USER = 11795
+ER_LDAP_AUTH_DISTINGUISHED_NAME = 11796
+ER_LDAP_AUTH_INIT_FAILED = 11797
+ER_LDAP_AUTH_OR_GROUP_RETRIEVAL_FAILED = 11798
+ER_LDAP_AUTH_USER_GROUP_SEARCH_FAILED = 11799
+ER_LDAP_AUTH_USER_BIND_FAILED = 11800
+ER_LDAP_AUTH_POOL_GET_FAILED_TO_CREATE_CONNECTION = 11801
+ER_LDAP_AUTH_FAILED_TO_CREATE_LDAP_CONNECTION = 11802
+ER_LDAP_AUTH_FAILED_TO_ESTABLISH_TLS_CONNECTION = 11803
+ER_LDAP_AUTH_FAILED_TO_SEARCH_DN = 11804
+ER_LDAP_AUTH_CONNECTION_POOL_REINIT_ENTER = 11805
+ER_SYSTEMD_NOTIFY_PATH_TOO_LONG = 11806
+ER_SYSTEMD_NOTIFY_CONNECT_FAILED = 11807
+ER_SYSTEMD_NOTIFY_WRITE_FAILED = 11808
+ER_FOUND_MISSING_GTIDS = 11809
+ER_PID_FILE_PRIV_DIRECTORY_INSECURE = 11810
+ER_CANT_CHECK_PID_PATH = 11811
+ER_VALIDATE_PWD_STATUS_VAR_REGISTRATION_FAILED = 11812
+ER_VALIDATE_PWD_STATUS_VAR_UNREGISTRATION_FAILED = 11813
+ER_VALIDATE_PWD_DICT_FILE_OPEN_FAILED = 11814
+ER_VALIDATE_PWD_COULD_BE_NULL = 11815
+ER_VALIDATE_PWD_STRING_CONV_TO_LOWERCASE_FAILED = 11816
+ER_VALIDATE_PWD_STRING_CONV_TO_BUFFER_FAILED = 11817
+ER_VALIDATE_PWD_STRING_HANDLER_MEM_ALLOCATION_FAILED = 11818
+ER_VALIDATE_PWD_STRONG_POLICY_DICT_FILE_UNSPECIFIED = 11819
+ER_VALIDATE_PWD_CONVERT_TO_BUFFER_FAILED = 11820
+ER_VALIDATE_PWD_VARIABLE_REGISTRATION_FAILED = 11821
+ER_VALIDATE_PWD_VARIABLE_UNREGISTRATION_FAILED = 11822
+ER_KEYRING_MIGRATION_EXTRA_OPTIONS = 11823
+OBSOLETE_ER_INVALID_DEFAULT_UTF8MB4_COLLATION = 11824
+ER_IB_MSG_0 = 11825
+ER_IB_MSG_1 = 11826
+ER_IB_MSG_2 = 11827
+ER_IB_MSG_3 = 11828
+ER_IB_MSG_4 = 11829
+ER_IB_MSG_5 = 11830
+ER_IB_MSG_6 = 11831
+ER_IB_MSG_7 = 11832
+ER_IB_MSG_8 = 11833
+ER_IB_MSG_9 = 11834
+ER_IB_MSG_10 = 11835
+ER_IB_MSG_11 = 11836
+ER_IB_MSG_12 = 11837
+ER_IB_MSG_13 = 11838
+ER_IB_MSG_14 = 11839
+ER_IB_MSG_15 = 11840
+ER_IB_MSG_16 = 11841
+ER_IB_MSG_17 = 11842
+ER_IB_MSG_18 = 11843
+ER_IB_MSG_19 = 11844
+ER_IB_MSG_20 = 11845
+ER_IB_MSG_21 = 11846
+ER_IB_MSG_22 = 11847
+ER_IB_MSG_23 = 11848
+ER_IB_MSG_24 = 11849
+ER_IB_MSG_25 = 11850
+ER_IB_MSG_26 = 11851
+ER_IB_MSG_27 = 11852
+ER_IB_MSG_28 = 11853
+ER_IB_MSG_29 = 11854
+ER_IB_MSG_30 = 11855
+ER_IB_MSG_31 = 11856
+ER_IB_MSG_32 = 11857
+ER_IB_MSG_33 = 11858
+ER_IB_MSG_34 = 11859
+ER_IB_MSG_35 = 11860
+ER_IB_MSG_36 = 11861
+ER_IB_MSG_37 = 11862
+ER_IB_MSG_38 = 11863
+ER_IB_MSG_39 = 11864
+ER_IB_MSG_40 = 11865
+ER_IB_MSG_41 = 11866
+ER_IB_MSG_42 = 11867
+ER_IB_MSG_43 = 11868
+ER_IB_MSG_44 = 11869
+ER_IB_MSG_45 = 11870
+ER_IB_MSG_46 = 11871
+ER_IB_MSG_47 = 11872
+ER_IB_MSG_48 = 11873
+ER_IB_MSG_49 = 11874
+ER_IB_MSG_50 = 11875
+ER_IB_MSG_51 = 11876
+ER_IB_MSG_52 = 11877
+ER_IB_MSG_53 = 11878
+ER_IB_MSG_54 = 11879
+ER_IB_MSG_55 = 11880
+ER_IB_MSG_56 = 11881
+ER_IB_MSG_57 = 11882
+ER_IB_MSG_58 = 11883
+ER_IB_MSG_59 = 11884
+ER_IB_MSG_60 = 11885
+ER_IB_MSG_61 = 11886
+ER_IB_MSG_62 = 11887
+ER_IB_MSG_63 = 11888
+ER_IB_MSG_64 = 11889
+ER_IB_MSG_65 = 11890
+ER_IB_MSG_66 = 11891
+ER_IB_MSG_67 = 11892
+ER_IB_MSG_68 = 11893
+ER_IB_MSG_69 = 11894
+ER_IB_MSG_70 = 11895
+ER_IB_MSG_71 = 11896
+ER_IB_MSG_72 = 11897
+ER_IB_MSG_73 = 11898
+ER_IB_MSG_74 = 11899
+ER_IB_MSG_75 = 11900
+ER_IB_MSG_76 = 11901
+ER_IB_MSG_77 = 11902
+ER_IB_MSG_78 = 11903
+ER_IB_MSG_79 = 11904
+ER_IB_MSG_80 = 11905
+ER_IB_MSG_81 = 11906
+ER_IB_MSG_82 = 11907
+ER_IB_MSG_83 = 11908
+ER_IB_MSG_84 = 11909
+ER_IB_MSG_85 = 11910
+ER_IB_MSG_86 = 11911
+ER_IB_MSG_87 = 11912
+ER_IB_MSG_88 = 11913
+ER_IB_MSG_89 = 11914
+ER_IB_MSG_90 = 11915
+ER_IB_MSG_91 = 11916
+ER_IB_MSG_92 = 11917
+ER_IB_MSG_93 = 11918
+ER_IB_MSG_94 = 11919
+ER_IB_MSG_95 = 11920
+ER_IB_MSG_96 = 11921
+ER_IB_MSG_97 = 11922
+ER_IB_MSG_98 = 11923
+ER_IB_MSG_99 = 11924
+ER_IB_MSG_100 = 11925
+ER_IB_MSG_101 = 11926
+ER_IB_MSG_102 = 11927
+ER_IB_MSG_103 = 11928
+ER_IB_MSG_104 = 11929
+ER_IB_MSG_105 = 11930
+ER_IB_MSG_106 = 11931
+ER_IB_MSG_107 = 11932
+ER_IB_MSG_108 = 11933
+ER_IB_MSG_109 = 11934
+ER_IB_MSG_110 = 11935
+ER_IB_MSG_111 = 11936
+ER_IB_MSG_112 = 11937
+ER_IB_MSG_113 = 11938
+ER_IB_MSG_114 = 11939
+ER_IB_MSG_115 = 11940
+ER_IB_MSG_116 = 11941
+ER_IB_MSG_117 = 11942
+ER_IB_MSG_118 = 11943
+ER_IB_MSG_119 = 11944
+ER_IB_MSG_120 = 11945
+ER_IB_MSG_121 = 11946
+ER_IB_MSG_122 = 11947
+ER_IB_MSG_123 = 11948
+ER_IB_MSG_124 = 11949
+ER_IB_MSG_125 = 11950
+ER_IB_MSG_126 = 11951
+ER_IB_MSG_127 = 11952
+ER_IB_MSG_128 = 11953
+ER_IB_MSG_129 = 11954
+ER_IB_MSG_130 = 11955
+ER_IB_MSG_131 = 11956
+ER_IB_MSG_132 = 11957
+ER_IB_MSG_133 = 11958
+ER_IB_MSG_134 = 11959
+ER_IB_MSG_135 = 11960
+ER_IB_MSG_136 = 11961
+ER_IB_MSG_137 = 11962
+ER_IB_MSG_138 = 11963
+ER_IB_MSG_139 = 11964
+ER_IB_MSG_140 = 11965
+ER_IB_MSG_141 = 11966
+ER_IB_MSG_142 = 11967
+ER_IB_MSG_143 = 11968
+ER_IB_MSG_144 = 11969
+ER_IB_MSG_145 = 11970
+ER_IB_MSG_146 = 11971
+ER_IB_MSG_147 = 11972
+ER_IB_MSG_148 = 11973
+ER_IB_MSG_149 = 11974
+ER_IB_MSG_150 = 11975
+ER_IB_MSG_151 = 11976
+ER_IB_MSG_152 = 11977
+ER_IB_MSG_153 = 11978
+ER_IB_MSG_154 = 11979
+ER_IB_MSG_155 = 11980
+ER_IB_MSG_156 = 11981
+ER_IB_MSG_157 = 11982
+ER_IB_MSG_158 = 11983
+ER_IB_MSG_159 = 11984
+ER_IB_MSG_160 = 11985
+ER_IB_MSG_161 = 11986
+ER_IB_MSG_162 = 11987
+ER_IB_MSG_163 = 11988
+ER_IB_MSG_164 = 11989
+ER_IB_MSG_165 = 11990
+ER_IB_MSG_166 = 11991
+ER_IB_MSG_167 = 11992
+ER_IB_MSG_168 = 11993
+ER_IB_MSG_169 = 11994
+ER_IB_MSG_170 = 11995
+ER_IB_MSG_171 = 11996
+ER_IB_MSG_172 = 11997
+ER_IB_MSG_173 = 11998
+ER_IB_MSG_174 = 11999
+ER_IB_MSG_175 = 12000
+ER_IB_MSG_176 = 12001
+ER_IB_MSG_177 = 12002
+ER_IB_MSG_178 = 12003
+ER_IB_MSG_179 = 12004
+ER_IB_MSG_180 = 12005
+ER_IB_MSG_181 = 12006
+ER_IB_MSG_182 = 12007
+ER_IB_MSG_183 = 12008
+ER_IB_MSG_184 = 12009
+ER_IB_MSG_185 = 12010
+ER_IB_MSG_186 = 12011
+ER_IB_MSG_187 = 12012
+ER_IB_MSG_188 = 12013
+ER_IB_MSG_189 = 12014
+ER_IB_MSG_190 = 12015
+ER_IB_MSG_191 = 12016
+ER_IB_MSG_192 = 12017
+ER_IB_MSG_193 = 12018
+ER_IB_MSG_194 = 12019
+ER_IB_MSG_195 = 12020
+ER_IB_MSG_196 = 12021
+ER_IB_MSG_197 = 12022
+ER_IB_MSG_198 = 12023
+ER_IB_MSG_199 = 12024
+ER_IB_MSG_200 = 12025
+ER_IB_MSG_201 = 12026
+ER_IB_MSG_202 = 12027
+ER_IB_MSG_203 = 12028
+ER_IB_MSG_204 = 12029
+ER_IB_MSG_205 = 12030
+ER_IB_MSG_206 = 12031
+ER_IB_MSG_207 = 12032
+ER_IB_MSG_208 = 12033
+ER_IB_MSG_209 = 12034
+ER_IB_MSG_210 = 12035
+ER_IB_MSG_211 = 12036
+ER_IB_MSG_212 = 12037
+ER_IB_MSG_213 = 12038
+ER_IB_MSG_214 = 12039
+ER_IB_MSG_215 = 12040
+ER_IB_MSG_216 = 12041
+ER_IB_MSG_217 = 12042
+ER_IB_MSG_218 = 12043
+ER_IB_MSG_219 = 12044
+ER_IB_MSG_220 = 12045
+ER_IB_MSG_221 = 12046
+ER_IB_MSG_222 = 12047
+ER_IB_MSG_223 = 12048
+ER_IB_MSG_224 = 12049
+ER_IB_MSG_225 = 12050
+ER_IB_MSG_226 = 12051
+ER_IB_MSG_227 = 12052
+ER_IB_MSG_228 = 12053
+ER_IB_MSG_229 = 12054
+ER_IB_MSG_230 = 12055
+ER_IB_MSG_231 = 12056
+ER_IB_MSG_232 = 12057
+ER_IB_MSG_233 = 12058
+ER_IB_MSG_234 = 12059
+ER_IB_MSG_235 = 12060
+ER_IB_MSG_236 = 12061
+ER_IB_MSG_237 = 12062
+ER_IB_MSG_238 = 12063
+ER_IB_MSG_239 = 12064
+ER_IB_MSG_240 = 12065
+ER_IB_MSG_241 = 12066
+ER_IB_MSG_242 = 12067
+ER_IB_MSG_243 = 12068
+ER_IB_MSG_244 = 12069
+ER_IB_MSG_245 = 12070
+ER_IB_MSG_246 = 12071
+ER_IB_MSG_247 = 12072
+ER_IB_MSG_248 = 12073
+ER_IB_MSG_249 = 12074
+ER_IB_MSG_250 = 12075
+ER_IB_MSG_251 = 12076
+ER_IB_MSG_252 = 12077
+ER_IB_MSG_253 = 12078
+ER_IB_MSG_254 = 12079
+ER_IB_MSG_255 = 12080
+ER_IB_MSG_256 = 12081
+ER_IB_MSG_257 = 12082
+ER_IB_MSG_258 = 12083
+ER_IB_MSG_259 = 12084
+ER_IB_MSG_260 = 12085
+ER_IB_MSG_261 = 12086
+ER_IB_MSG_262 = 12087
+ER_IB_MSG_263 = 12088
+ER_IB_MSG_264 = 12089
+ER_IB_MSG_265 = 12090
+ER_IB_MSG_266 = 12091
+ER_IB_MSG_267 = 12092
+ER_IB_MSG_268 = 12093
+ER_IB_MSG_269 = 12094
+ER_IB_MSG_270 = 12095
+ER_IB_MSG_271 = 12096
+ER_IB_MSG_272 = 12097
+ER_IB_MSG_273 = 12098
+ER_IB_MSG_274 = 12099
+ER_IB_MSG_275 = 12100
+ER_IB_MSG_276 = 12101
+ER_IB_MSG_277 = 12102
+ER_IB_MSG_278 = 12103
+ER_IB_MSG_279 = 12104
+ER_IB_MSG_280 = 12105
+ER_IB_MSG_281 = 12106
+ER_IB_MSG_282 = 12107
+ER_IB_MSG_283 = 12108
+ER_IB_MSG_284 = 12109
+ER_IB_MSG_285 = 12110
+ER_IB_MSG_286 = 12111
+ER_IB_MSG_287 = 12112
+ER_IB_MSG_288 = 12113
+ER_IB_MSG_289 = 12114
+ER_IB_MSG_290 = 12115
+ER_IB_MSG_291 = 12116
+ER_IB_MSG_292 = 12117
+ER_IB_MSG_293 = 12118
+ER_IB_MSG_294 = 12119
+ER_IB_MSG_295 = 12120
+ER_IB_MSG_296 = 12121
+ER_IB_MSG_297 = 12122
+ER_IB_MSG_298 = 12123
+ER_IB_MSG_299 = 12124
+ER_IB_MSG_300 = 12125
+ER_IB_MSG_301 = 12126
+ER_IB_MSG_302 = 12127
+ER_IB_MSG_303 = 12128
+ER_IB_MSG_304 = 12129
+ER_IB_MSG_305 = 12130
+ER_IB_MSG_306 = 12131
+ER_IB_MSG_307 = 12132
+ER_IB_MSG_308 = 12133
+ER_IB_MSG_309 = 12134
+ER_IB_MSG_310 = 12135
+ER_IB_MSG_311 = 12136
+ER_IB_MSG_312 = 12137
+ER_IB_MSG_313 = 12138
+ER_IB_MSG_314 = 12139
+ER_IB_MSG_315 = 12140
+ER_IB_MSG_316 = 12141
+ER_IB_MSG_317 = 12142
+ER_IB_MSG_318 = 12143
+ER_IB_MSG_319 = 12144
+ER_IB_MSG_320 = 12145
+ER_IB_MSG_321 = 12146
+ER_IB_MSG_322 = 12147
+ER_IB_MSG_323 = 12148
+ER_IB_MSG_324 = 12149
+ER_IB_MSG_325 = 12150
+ER_IB_MSG_326 = 12151
+ER_IB_MSG_327 = 12152
+ER_IB_MSG_328 = 12153
+ER_IB_MSG_329 = 12154
+ER_IB_MSG_330 = 12155
+ER_IB_MSG_331 = 12156
+ER_IB_MSG_332 = 12157
+ER_IB_MSG_333 = 12158
+ER_IB_MSG_334 = 12159
+ER_IB_MSG_335 = 12160
+ER_IB_MSG_336 = 12161
+ER_IB_MSG_337 = 12162
+ER_IB_MSG_338 = 12163
+ER_IB_MSG_339 = 12164
+ER_IB_MSG_340 = 12165
+ER_IB_MSG_341 = 12166
+ER_IB_MSG_342 = 12167
+ER_IB_MSG_343 = 12168
+ER_IB_MSG_344 = 12169
+ER_IB_MSG_345 = 12170
+ER_IB_MSG_346 = 12171
+ER_IB_MSG_347 = 12172
+ER_IB_MSG_348 = 12173
+ER_IB_MSG_349 = 12174
+ER_IB_MSG_350 = 12175
+ER_IB_MSG_351 = 12176
+ER_IB_MSG_352 = 12177
+ER_IB_MSG_353 = 12178
+ER_IB_MSG_354 = 12179
+ER_IB_MSG_355 = 12180
+ER_IB_MSG_356 = 12181
+ER_IB_MSG_357 = 12182
+ER_IB_MSG_358 = 12183
+ER_IB_MSG_359 = 12184
+ER_IB_MSG_360 = 12185
+ER_IB_MSG_361 = 12186
+ER_IB_MSG_362 = 12187
+ER_IB_MSG_363 = 12188
+ER_IB_MSG_364 = 12189
+ER_IB_MSG_365 = 12190
+ER_IB_MSG_366 = 12191
+ER_IB_MSG_367 = 12192
+ER_IB_MSG_368 = 12193
+ER_IB_MSG_369 = 12194
+ER_IB_MSG_370 = 12195
+ER_IB_MSG_371 = 12196
+ER_IB_MSG_372 = 12197
+ER_IB_MSG_373 = 12198
+ER_IB_MSG_374 = 12199
+ER_IB_MSG_375 = 12200
+ER_IB_MSG_376 = 12201
+ER_IB_MSG_377 = 12202
+ER_IB_MSG_378 = 12203
+ER_IB_MSG_379 = 12204
+ER_IB_MSG_380 = 12205
+ER_IB_MSG_381 = 12206
+ER_IB_MSG_382 = 12207
+ER_IB_MSG_383 = 12208
+ER_IB_MSG_384 = 12209
+ER_IB_MSG_385 = 12210
+ER_IB_MSG_386 = 12211
+ER_IB_MSG_387 = 12212
+ER_IB_MSG_388 = 12213
+ER_IB_MSG_389 = 12214
+ER_IB_MSG_390 = 12215
+ER_IB_MSG_391 = 12216
+ER_IB_MSG_392 = 12217
+ER_IB_MSG_393 = 12218
+ER_IB_MSG_394 = 12219
+ER_IB_MSG_395 = 12220
+ER_IB_MSG_396 = 12221
+ER_IB_MSG_397 = 12222
+ER_IB_MSG_398 = 12223
+ER_IB_MSG_399 = 12224
+ER_IB_MSG_400 = 12225
+ER_IB_MSG_401 = 12226
+ER_IB_MSG_402 = 12227
+ER_IB_MSG_403 = 12228
+ER_IB_MSG_404 = 12229
+ER_IB_MSG_405 = 12230
+ER_IB_MSG_406 = 12231
+ER_IB_MSG_407 = 12232
+ER_IB_MSG_408 = 12233
+ER_IB_MSG_409 = 12234
+ER_IB_MSG_410 = 12235
+ER_IB_MSG_411 = 12236
+ER_IB_MSG_412 = 12237
+ER_IB_MSG_413 = 12238
+ER_IB_MSG_414 = 12239
+ER_IB_MSG_415 = 12240
+ER_IB_MSG_416 = 12241
+ER_IB_MSG_417 = 12242
+ER_IB_MSG_418 = 12243
+ER_IB_MSG_419 = 12244
+ER_IB_MSG_420 = 12245
+ER_IB_MSG_421 = 12246
+ER_IB_MSG_422 = 12247
+ER_IB_MSG_423 = 12248
+ER_IB_MSG_424 = 12249
+ER_IB_MSG_425 = 12250
+ER_IB_MSG_426 = 12251
+ER_IB_MSG_427 = 12252
+ER_IB_MSG_428 = 12253
+ER_IB_MSG_429 = 12254
+ER_IB_MSG_430 = 12255
+ER_IB_MSG_431 = 12256
+ER_IB_MSG_432 = 12257
+ER_IB_MSG_433 = 12258
+ER_IB_MSG_434 = 12259
+ER_IB_MSG_435 = 12260
+ER_IB_MSG_436 = 12261
+ER_IB_MSG_437 = 12262
+ER_IB_MSG_438 = 12263
+ER_IB_MSG_439 = 12264
+ER_IB_MSG_440 = 12265
+ER_IB_MSG_441 = 12266
+ER_IB_MSG_442 = 12267
+ER_IB_MSG_443 = 12268
+ER_IB_MSG_444 = 12269
+ER_IB_MSG_445 = 12270
+ER_IB_MSG_446 = 12271
+ER_IB_MSG_447 = 12272
+ER_IB_MSG_448 = 12273
+ER_IB_MSG_449 = 12274
+ER_IB_MSG_450 = 12275
+ER_IB_MSG_451 = 12276
+ER_IB_MSG_452 = 12277
+ER_IB_MSG_453 = 12278
+ER_IB_MSG_454 = 12279
+ER_IB_MSG_455 = 12280
+ER_IB_MSG_456 = 12281
+ER_IB_MSG_457 = 12282
+ER_IB_MSG_458 = 12283
+ER_IB_MSG_459 = 12284
+ER_IB_MSG_460 = 12285
+ER_IB_MSG_461 = 12286
+ER_IB_MSG_462 = 12287
+ER_IB_MSG_463 = 12288
+ER_IB_MSG_464 = 12289
+ER_IB_MSG_465 = 12290
+ER_IB_MSG_466 = 12291
+ER_IB_MSG_467 = 12292
+ER_IB_MSG_468 = 12293
+ER_IB_MSG_469 = 12294
+ER_IB_MSG_470 = 12295
+ER_IB_MSG_471 = 12296
+ER_IB_MSG_472 = 12297
+ER_IB_MSG_473 = 12298
+ER_IB_MSG_474 = 12299
+ER_IB_MSG_475 = 12300
+ER_IB_MSG_476 = 12301
+ER_IB_MSG_477 = 12302
+ER_IB_MSG_478 = 12303
+ER_IB_MSG_479 = 12304
+ER_IB_MSG_480 = 12305
+ER_IB_MSG_481 = 12306
+ER_IB_MSG_482 = 12307
+ER_IB_MSG_483 = 12308
+ER_IB_MSG_484 = 12309
+ER_IB_MSG_485 = 12310
+ER_IB_MSG_486 = 12311
+ER_IB_MSG_487 = 12312
+ER_IB_MSG_488 = 12313
+ER_IB_MSG_489 = 12314
+ER_IB_MSG_490 = 12315
+ER_IB_MSG_491 = 12316
+ER_IB_MSG_492 = 12317
+ER_IB_MSG_493 = 12318
+ER_IB_MSG_494 = 12319
+ER_IB_MSG_495 = 12320
+ER_IB_MSG_496 = 12321
+ER_IB_MSG_497 = 12322
+ER_IB_MSG_498 = 12323
+ER_IB_MSG_499 = 12324
+ER_IB_MSG_500 = 12325
+ER_IB_MSG_501 = 12326
+ER_IB_MSG_502 = 12327
+ER_IB_MSG_503 = 12328
+ER_IB_MSG_504 = 12329
+ER_IB_MSG_505 = 12330
+ER_IB_MSG_506 = 12331
+ER_IB_MSG_507 = 12332
+ER_IB_MSG_508 = 12333
+ER_IB_MSG_509 = 12334
+ER_IB_MSG_510 = 12335
+ER_IB_MSG_511 = 12336
+ER_IB_MSG_512 = 12337
+ER_IB_MSG_513 = 12338
+ER_IB_MSG_514 = 12339
+ER_IB_MSG_515 = 12340
+ER_IB_MSG_516 = 12341
+ER_IB_MSG_517 = 12342
+ER_IB_MSG_518 = 12343
+ER_IB_MSG_519 = 12344
+ER_IB_MSG_520 = 12345
+ER_IB_MSG_521 = 12346
+ER_IB_MSG_522 = 12347
+ER_IB_MSG_523 = 12348
+ER_IB_MSG_524 = 12349
+ER_IB_MSG_525 = 12350
+ER_IB_MSG_526 = 12351
+ER_IB_MSG_527 = 12352
+ER_IB_MSG_528 = 12353
+ER_IB_MSG_529 = 12354
+ER_IB_MSG_530 = 12355
+ER_IB_MSG_531 = 12356
+ER_IB_MSG_532 = 12357
+ER_IB_MSG_533 = 12358
+ER_IB_MSG_534 = 12359
+ER_IB_MSG_535 = 12360
+ER_IB_MSG_536 = 12361
+ER_IB_MSG_537 = 12362
+ER_IB_MSG_538 = 12363
+ER_IB_MSG_539 = 12364
+ER_IB_MSG_540 = 12365
+ER_IB_MSG_541 = 12366
+ER_IB_MSG_542 = 12367
+ER_IB_MSG_543 = 12368
+ER_IB_MSG_544 = 12369
+ER_IB_MSG_545 = 12370
+ER_IB_MSG_546 = 12371
+ER_IB_MSG_547 = 12372
+ER_IB_MSG_548 = 12373
+ER_IB_MSG_549 = 12374
+ER_IB_MSG_550 = 12375
+ER_IB_MSG_551 = 12376
+ER_IB_MSG_552 = 12377
+ER_IB_MSG_553 = 12378
+ER_IB_MSG_554 = 12379
+ER_IB_MSG_555 = 12380
+ER_IB_MSG_556 = 12381
+ER_IB_MSG_557 = 12382
+ER_IB_MSG_558 = 12383
+ER_IB_MSG_559 = 12384
+ER_IB_MSG_560 = 12385
+ER_IB_MSG_561 = 12386
+ER_IB_MSG_562 = 12387
+ER_IB_MSG_563 = 12388
+ER_IB_MSG_564 = 12389
+ER_IB_MSG_565 = 12390
+ER_IB_MSG_566 = 12391
+ER_IB_MSG_567 = 12392
+ER_IB_MSG_568 = 12393
+ER_IB_MSG_569 = 12394
+ER_IB_MSG_570 = 12395
+ER_IB_MSG_571 = 12396
+ER_IB_MSG_572 = 12397
+ER_IB_MSG_573 = 12398
+ER_IB_MSG_574 = 12399
+ER_IB_MSG_575 = 12400
+ER_IB_MSG_576 = 12401
+ER_IB_MSG_577 = 12402
+ER_IB_MSG_578 = 12403
+ER_IB_MSG_579 = 12404
+ER_IB_MSG_580 = 12405
+ER_IB_MSG_581 = 12406
+ER_IB_MSG_582 = 12407
+ER_IB_MSG_583 = 12408
+ER_IB_MSG_584 = 12409
+ER_IB_MSG_585 = 12410
+ER_IB_MSG_586 = 12411
+ER_IB_MSG_587 = 12412
+ER_IB_MSG_588 = 12413
+ER_IB_MSG_589 = 12414
+ER_IB_MSG_590 = 12415
+ER_IB_MSG_591 = 12416
+ER_IB_MSG_592 = 12417
+ER_IB_MSG_593 = 12418
+ER_IB_MSG_594 = 12419
+ER_IB_MSG_595 = 12420
+ER_IB_MSG_596 = 12421
+ER_IB_MSG_597 = 12422
+ER_IB_MSG_598 = 12423
+ER_IB_MSG_599 = 12424
+ER_IB_MSG_600 = 12425
+ER_IB_MSG_601 = 12426
+ER_IB_MSG_602 = 12427
+ER_IB_MSG_603 = 12428
+ER_IB_MSG_604 = 12429
+ER_IB_MSG_605 = 12430
+ER_IB_MSG_606 = 12431
+ER_IB_MSG_607 = 12432
+ER_IB_MSG_608 = 12433
+ER_IB_MSG_609 = 12434
+ER_IB_MSG_610 = 12435
+ER_IB_MSG_611 = 12436
+ER_IB_MSG_612 = 12437
+ER_IB_MSG_613 = 12438
+ER_IB_MSG_614 = 12439
+ER_IB_MSG_615 = 12440
+ER_IB_MSG_616 = 12441
+ER_IB_MSG_617 = 12442
+ER_IB_MSG_618 = 12443
+ER_IB_MSG_619 = 12444
+ER_IB_MSG_620 = 12445
+ER_IB_MSG_621 = 12446
+ER_IB_MSG_622 = 12447
+ER_IB_MSG_623 = 12448
+ER_IB_MSG_624 = 12449
+ER_IB_MSG_625 = 12450
+ER_IB_MSG_626 = 12451
+ER_IB_MSG_627 = 12452
+ER_IB_MSG_628 = 12453
+ER_IB_MSG_629 = 12454
+ER_IB_MSG_630 = 12455
+ER_IB_MSG_631 = 12456
+ER_IB_MSG_632 = 12457
+ER_IB_MSG_633 = 12458
+ER_IB_MSG_634 = 12459
+ER_IB_MSG_635 = 12460
+ER_IB_MSG_636 = 12461
+ER_IB_MSG_637 = 12462
+ER_IB_MSG_638 = 12463
+ER_IB_MSG_639 = 12464
+ER_IB_MSG_640 = 12465
+ER_IB_MSG_641 = 12466
+ER_IB_MSG_642 = 12467
+ER_IB_MSG_643 = 12468
+ER_IB_MSG_644 = 12469
+ER_IB_MSG_645 = 12470
+ER_IB_MSG_646 = 12471
+ER_IB_MSG_647 = 12472
+ER_IB_MSG_648 = 12473
+ER_IB_MSG_649 = 12474
+ER_IB_MSG_650 = 12475
+ER_IB_MSG_651 = 12476
+ER_IB_MSG_652 = 12477
+ER_IB_MSG_653 = 12478
+ER_IB_MSG_654 = 12479
+ER_IB_MSG_655 = 12480
+ER_IB_MSG_656 = 12481
+ER_IB_MSG_657 = 12482
+ER_IB_MSG_658 = 12483
+ER_IB_MSG_659 = 12484
+ER_IB_MSG_660 = 12485
+ER_IB_MSG_661 = 12486
+ER_IB_MSG_662 = 12487
+ER_IB_MSG_663 = 12488
+ER_IB_MSG_664 = 12489
+ER_IB_MSG_665 = 12490
+ER_IB_MSG_666 = 12491
+ER_IB_MSG_667 = 12492
+ER_IB_MSG_668 = 12493
+ER_IB_MSG_669 = 12494
+ER_IB_MSG_670 = 12495
+ER_IB_MSG_671 = 12496
+ER_IB_MSG_672 = 12497
+ER_IB_MSG_673 = 12498
+ER_IB_MSG_674 = 12499
+ER_IB_MSG_675 = 12500
+ER_IB_MSG_676 = 12501
+ER_IB_MSG_677 = 12502
+ER_IB_MSG_678 = 12503
+ER_IB_MSG_679 = 12504
+ER_IB_MSG_680 = 12505
+ER_IB_MSG_681 = 12506
+ER_IB_MSG_682 = 12507
+ER_IB_MSG_683 = 12508
+ER_IB_MSG_684 = 12509
+ER_IB_MSG_685 = 12510
+ER_IB_MSG_686 = 12511
+ER_IB_MSG_687 = 12512
+ER_IB_MSG_688 = 12513
+ER_IB_MSG_689 = 12514
+ER_IB_MSG_690 = 12515
+ER_IB_MSG_691 = 12516
+ER_IB_MSG_692 = 12517
+ER_IB_MSG_693 = 12518
+ER_IB_MSG_694 = 12519
+ER_IB_MSG_695 = 12520
+ER_IB_MSG_696 = 12521
+ER_IB_MSG_697 = 12522
+ER_IB_MSG_698 = 12523
+ER_IB_MSG_699 = 12524
+ER_IB_MSG_700 = 12525
+ER_IB_MSG_701 = 12526
+ER_IB_MSG_702 = 12527
+ER_IB_MSG_703 = 12528
+ER_IB_MSG_704 = 12529
+ER_IB_MSG_705 = 12530
+ER_IB_MSG_706 = 12531
+ER_IB_MSG_707 = 12532
+ER_IB_MSG_708 = 12533
+ER_IB_MSG_709 = 12534
+ER_IB_MSG_710 = 12535
+ER_IB_MSG_711 = 12536
+ER_IB_MSG_712 = 12537
+ER_IB_MSG_713 = 12538
+ER_IB_MSG_714 = 12539
+ER_IB_MSG_715 = 12540
+ER_IB_MSG_716 = 12541
+ER_IB_MSG_717 = 12542
+ER_IB_MSG_718 = 12543
+ER_IB_MSG_719 = 12544
+ER_IB_MSG_720 = 12545
+ER_IB_MSG_721 = 12546
+ER_IB_MSG_722 = 12547
+ER_IB_MSG_723 = 12548
+ER_IB_MSG_724 = 12549
+ER_IB_MSG_725 = 12550
+ER_IB_MSG_726 = 12551
+ER_IB_MSG_727 = 12552
+ER_IB_MSG_728 = 12553
+ER_IB_MSG_729 = 12554
+ER_IB_MSG_730 = 12555
+ER_IB_MSG_731 = 12556
+ER_IB_MSG_732 = 12557
+ER_IB_MSG_733 = 12558
+ER_IB_MSG_734 = 12559
+ER_IB_MSG_735 = 12560
+ER_IB_MSG_736 = 12561
+ER_IB_MSG_737 = 12562
+ER_IB_MSG_738 = 12563
+ER_IB_MSG_739 = 12564
+ER_IB_MSG_740 = 12565
+ER_IB_MSG_741 = 12566
+ER_IB_MSG_742 = 12567
+ER_IB_MSG_743 = 12568
+ER_IB_MSG_744 = 12569
+ER_IB_MSG_745 = 12570
+ER_IB_MSG_746 = 12571
+ER_IB_MSG_747 = 12572
+ER_IB_MSG_748 = 12573
+ER_IB_MSG_749 = 12574
+ER_IB_MSG_750 = 12575
+ER_IB_MSG_751 = 12576
+ER_IB_MSG_752 = 12577
+ER_IB_MSG_753 = 12578
+ER_IB_MSG_754 = 12579
+ER_IB_MSG_755 = 12580
+ER_IB_MSG_756 = 12581
+ER_IB_MSG_757 = 12582
+ER_IB_MSG_758 = 12583
+ER_IB_MSG_759 = 12584
+ER_IB_MSG_760 = 12585
+ER_IB_MSG_761 = 12586
+ER_IB_MSG_762 = 12587
+ER_IB_MSG_763 = 12588
+ER_IB_MSG_764 = 12589
+ER_IB_MSG_765 = 12590
+ER_IB_MSG_766 = 12591
+ER_IB_MSG_767 = 12592
+ER_IB_MSG_768 = 12593
+ER_IB_MSG_769 = 12594
+ER_IB_MSG_770 = 12595
+ER_IB_MSG_771 = 12596
+ER_IB_MSG_772 = 12597
+ER_IB_MSG_773 = 12598
+ER_IB_MSG_774 = 12599
+ER_IB_MSG_775 = 12600
+ER_IB_MSG_776 = 12601
+ER_IB_MSG_777 = 12602
+ER_IB_MSG_778 = 12603
+ER_IB_MSG_779 = 12604
+ER_IB_MSG_780 = 12605
+ER_IB_MSG_781 = 12606
+ER_IB_MSG_782 = 12607
+ER_IB_MSG_783 = 12608
+ER_IB_MSG_784 = 12609
+ER_IB_MSG_785 = 12610
+ER_IB_MSG_786 = 12611
+ER_IB_MSG_787 = 12612
+ER_IB_MSG_788 = 12613
+ER_IB_MSG_789 = 12614
+ER_IB_MSG_790 = 12615
+ER_IB_MSG_791 = 12616
+ER_IB_MSG_792 = 12617
+ER_IB_MSG_793 = 12618
+ER_IB_MSG_794 = 12619
+ER_IB_MSG_795 = 12620
+ER_IB_MSG_796 = 12621
+ER_IB_MSG_797 = 12622
+ER_IB_MSG_798 = 12623
+ER_IB_MSG_799 = 12624
+ER_IB_MSG_800 = 12625
+ER_IB_MSG_801 = 12626
+ER_IB_MSG_802 = 12627
+ER_IB_MSG_803 = 12628
+ER_IB_MSG_804 = 12629
+ER_IB_MSG_805 = 12630
+ER_IB_MSG_806 = 12631
+ER_IB_MSG_807 = 12632
+ER_IB_MSG_808 = 12633
+ER_IB_MSG_809 = 12634
+ER_IB_MSG_810 = 12635
+ER_IB_MSG_811 = 12636
+ER_IB_MSG_812 = 12637
+ER_IB_MSG_813 = 12638
+ER_IB_MSG_814 = 12639
+ER_IB_MSG_815 = 12640
+ER_IB_MSG_816 = 12641
+ER_IB_MSG_817 = 12642
+ER_IB_MSG_818 = 12643
+ER_IB_MSG_819 = 12644
+ER_IB_MSG_820 = 12645
+ER_IB_MSG_821 = 12646
+ER_IB_MSG_822 = 12647
+ER_IB_MSG_823 = 12648
+ER_IB_MSG_824 = 12649
+ER_IB_MSG_825 = 12650
+ER_IB_MSG_826 = 12651
+ER_IB_MSG_827 = 12652
+ER_IB_MSG_828 = 12653
+ER_IB_MSG_829 = 12654
+ER_IB_MSG_830 = 12655
+ER_IB_MSG_831 = 12656
+ER_IB_MSG_832 = 12657
+ER_IB_MSG_833 = 12658
+ER_IB_MSG_834 = 12659
+ER_IB_MSG_835 = 12660
+ER_IB_MSG_836 = 12661
+ER_IB_MSG_837 = 12662
+ER_IB_MSG_838 = 12663
+ER_IB_MSG_839 = 12664
+ER_IB_MSG_840 = 12665
+ER_IB_MSG_841 = 12666
+ER_IB_MSG_842 = 12667
+ER_IB_MSG_843 = 12668
+ER_IB_MSG_844 = 12669
+ER_IB_MSG_845 = 12670
+ER_IB_MSG_846 = 12671
+ER_IB_MSG_847 = 12672
+ER_IB_MSG_848 = 12673
+ER_IB_MSG_849 = 12674
+ER_IB_MSG_850 = 12675
+ER_IB_MSG_851 = 12676
+ER_IB_MSG_852 = 12677
+ER_IB_MSG_853 = 12678
+ER_IB_MSG_854 = 12679
+ER_IB_MSG_855 = 12680
+ER_IB_MSG_856 = 12681
+ER_IB_MSG_857 = 12682
+ER_IB_MSG_858 = 12683
+ER_IB_MSG_859 = 12684
+ER_IB_MSG_860 = 12685
+ER_IB_MSG_861 = 12686
+ER_IB_MSG_862 = 12687
+ER_IB_MSG_863 = 12688
+ER_IB_MSG_864 = 12689
+ER_IB_MSG_865 = 12690
+ER_IB_MSG_866 = 12691
+ER_IB_MSG_867 = 12692
+ER_IB_MSG_868 = 12693
+ER_IB_MSG_869 = 12694
+ER_IB_MSG_870 = 12695
+ER_IB_MSG_871 = 12696
+ER_IB_MSG_872 = 12697
+ER_IB_MSG_873 = 12698
+ER_IB_MSG_874 = 12699
+ER_IB_MSG_875 = 12700
+ER_IB_MSG_876 = 12701
+ER_IB_MSG_877 = 12702
+ER_IB_MSG_878 = 12703
+ER_IB_MSG_879 = 12704
+ER_IB_MSG_880 = 12705
+ER_IB_MSG_881 = 12706
+ER_IB_MSG_882 = 12707
+ER_IB_MSG_883 = 12708
+ER_IB_MSG_884 = 12709
+ER_IB_MSG_885 = 12710
+ER_IB_MSG_886 = 12711
+ER_IB_MSG_887 = 12712
+ER_IB_MSG_888 = 12713
+ER_IB_MSG_889 = 12714
+ER_IB_MSG_890 = 12715
+ER_IB_MSG_891 = 12716
+ER_IB_MSG_892 = 12717
+ER_IB_MSG_893 = 12718
+ER_IB_MSG_894 = 12719
+ER_IB_MSG_895 = 12720
+ER_IB_MSG_896 = 12721
+ER_IB_MSG_897 = 12722
+ER_IB_MSG_898 = 12723
+ER_IB_MSG_899 = 12724
+ER_IB_MSG_900 = 12725
+ER_IB_MSG_901 = 12726
+ER_IB_MSG_902 = 12727
+ER_IB_MSG_903 = 12728
+ER_IB_MSG_904 = 12729
+ER_IB_MSG_905 = 12730
+ER_IB_MSG_906 = 12731
+ER_IB_MSG_907 = 12732
+ER_IB_MSG_908 = 12733
+ER_IB_MSG_909 = 12734
+ER_IB_MSG_910 = 12735
+ER_IB_MSG_911 = 12736
+ER_IB_MSG_912 = 12737
+ER_IB_MSG_913 = 12738
+ER_IB_MSG_914 = 12739
+ER_IB_MSG_915 = 12740
+ER_IB_MSG_916 = 12741
+ER_IB_MSG_917 = 12742
+ER_IB_MSG_918 = 12743
+ER_IB_MSG_919 = 12744
+ER_IB_MSG_920 = 12745
+ER_IB_MSG_921 = 12746
+ER_IB_MSG_922 = 12747
+ER_IB_MSG_923 = 12748
+ER_IB_MSG_924 = 12749
+ER_IB_MSG_925 = 12750
+ER_IB_MSG_926 = 12751
+ER_IB_MSG_927 = 12752
+ER_IB_MSG_928 = 12753
+ER_IB_MSG_929 = 12754
+ER_IB_MSG_930 = 12755
+ER_IB_MSG_931 = 12756
+ER_IB_MSG_932 = 12757
+ER_IB_MSG_933 = 12758
+ER_IB_MSG_934 = 12759
+ER_IB_MSG_935 = 12760
+ER_IB_MSG_936 = 12761
+ER_IB_MSG_937 = 12762
+ER_IB_MSG_938 = 12763
+ER_IB_MSG_939 = 12764
+ER_IB_MSG_940 = 12765
+ER_IB_MSG_941 = 12766
+ER_IB_MSG_942 = 12767
+ER_IB_MSG_943 = 12768
+ER_IB_MSG_944 = 12769
+ER_IB_MSG_945 = 12770
+ER_IB_MSG_946 = 12771
+ER_IB_MSG_947 = 12772
+ER_IB_MSG_948 = 12773
+ER_IB_MSG_949 = 12774
+ER_IB_MSG_950 = 12775
+ER_IB_MSG_951 = 12776
+ER_IB_MSG_952 = 12777
+ER_IB_MSG_953 = 12778
+ER_IB_MSG_954 = 12779
+ER_IB_MSG_955 = 12780
+ER_IB_MSG_956 = 12781
+ER_IB_MSG_957 = 12782
+ER_IB_MSG_958 = 12783
+ER_IB_MSG_959 = 12784
+ER_IB_MSG_960 = 12785
+ER_IB_MSG_961 = 12786
+ER_IB_MSG_962 = 12787
+ER_IB_MSG_963 = 12788
+ER_IB_MSG_964 = 12789
+ER_IB_MSG_965 = 12790
+ER_IB_MSG_966 = 12791
+ER_IB_MSG_967 = 12792
+ER_IB_MSG_968 = 12793
+ER_IB_MSG_969 = 12794
+ER_IB_MSG_970 = 12795
+ER_IB_MSG_971 = 12796
+ER_IB_MSG_972 = 12797
+ER_IB_MSG_973 = 12798
+ER_IB_MSG_974 = 12799
+ER_IB_MSG_975 = 12800
+ER_IB_MSG_976 = 12801
+ER_IB_MSG_977 = 12802
+ER_IB_MSG_978 = 12803
+ER_IB_MSG_979 = 12804
+ER_IB_MSG_980 = 12805
+ER_IB_MSG_981 = 12806
+ER_IB_MSG_982 = 12807
+ER_IB_MSG_983 = 12808
+ER_IB_MSG_984 = 12809
+ER_IB_MSG_985 = 12810
+ER_IB_MSG_986 = 12811
+ER_IB_MSG_987 = 12812
+ER_IB_MSG_988 = 12813
+ER_IB_MSG_989 = 12814
+ER_IB_MSG_990 = 12815
+ER_IB_MSG_991 = 12816
+ER_IB_MSG_992 = 12817
+ER_IB_MSG_993 = 12818
+ER_IB_MSG_994 = 12819
+ER_IB_MSG_995 = 12820
+ER_IB_MSG_996 = 12821
+ER_IB_MSG_997 = 12822
+ER_IB_MSG_998 = 12823
+ER_IB_MSG_999 = 12824
+ER_IB_MSG_1000 = 12825
+ER_IB_MSG_1001 = 12826
+ER_IB_MSG_1002 = 12827
+ER_IB_MSG_1003 = 12828
+ER_IB_MSG_1004 = 12829
+ER_IB_MSG_1005 = 12830
+ER_IB_MSG_1006 = 12831
+ER_IB_MSG_1007 = 12832
+ER_IB_MSG_1008 = 12833
+ER_IB_MSG_1009 = 12834
+ER_IB_MSG_1010 = 12835
+ER_IB_MSG_1011 = 12836
+ER_IB_MSG_1012 = 12837
+ER_IB_MSG_1013 = 12838
+ER_IB_MSG_1014 = 12839
+ER_IB_MSG_1015 = 12840
+ER_IB_MSG_1016 = 12841
+ER_IB_MSG_1017 = 12842
+ER_IB_MSG_1018 = 12843
+ER_IB_MSG_1019 = 12844
+ER_IB_MSG_1020 = 12845
+ER_IB_MSG_1021 = 12846
+ER_IB_MSG_1022 = 12847
+ER_IB_MSG_1023 = 12848
+ER_IB_MSG_1024 = 12849
+ER_IB_MSG_1025 = 12850
+ER_IB_MSG_1026 = 12851
+ER_IB_MSG_1027 = 12852
+ER_IB_MSG_1028 = 12853
+ER_IB_MSG_1029 = 12854
+ER_IB_MSG_1030 = 12855
+ER_IB_MSG_1031 = 12856
+ER_IB_MSG_1032 = 12857
+ER_IB_MSG_1033 = 12858
+ER_IB_MSG_1034 = 12859
+ER_IB_MSG_1035 = 12860
+ER_IB_MSG_1036 = 12861
+ER_IB_MSG_1037 = 12862
+ER_IB_MSG_1038 = 12863
+ER_IB_MSG_1039 = 12864
+ER_IB_MSG_1040 = 12865
+ER_IB_MSG_1041 = 12866
+ER_IB_MSG_1042 = 12867
+ER_IB_MSG_1043 = 12868
+ER_IB_MSG_1044 = 12869
+ER_IB_MSG_1045 = 12870
+ER_IB_MSG_1046 = 12871
+ER_IB_MSG_1047 = 12872
+ER_IB_MSG_1048 = 12873
+ER_IB_MSG_1049 = 12874
+ER_IB_MSG_1050 = 12875
+ER_IB_MSG_1051 = 12876
+ER_IB_MSG_1052 = 12877
+ER_IB_MSG_1053 = 12878
+ER_IB_MSG_1054 = 12879
+ER_IB_MSG_1055 = 12880
+ER_IB_MSG_1056 = 12881
+ER_IB_MSG_1057 = 12882
+ER_IB_MSG_1058 = 12883
+ER_IB_MSG_1059 = 12884
+ER_IB_MSG_1060 = 12885
+ER_IB_MSG_1061 = 12886
+ER_IB_MSG_1062 = 12887
+ER_IB_MSG_1063 = 12888
+ER_IB_MSG_1064 = 12889
+ER_IB_MSG_1065 = 12890
+ER_IB_MSG_1066 = 12891
+ER_IB_MSG_1067 = 12892
+ER_IB_MSG_1068 = 12893
+ER_IB_MSG_1069 = 12894
+ER_IB_MSG_1070 = 12895
+ER_IB_MSG_1071 = 12896
+ER_IB_MSG_1072 = 12897
+ER_IB_MSG_1073 = 12898
+ER_IB_MSG_1074 = 12899
+ER_IB_MSG_1075 = 12900
+ER_IB_MSG_1076 = 12901
+ER_IB_MSG_1077 = 12902
+ER_IB_MSG_1078 = 12903
+ER_IB_MSG_1079 = 12904
+ER_IB_MSG_1080 = 12905
+ER_IB_MSG_1081 = 12906
+ER_IB_MSG_1082 = 12907
+ER_IB_MSG_1083 = 12908
+ER_IB_MSG_1084 = 12909
+ER_IB_MSG_1085 = 12910
+ER_IB_MSG_1086 = 12911
+ER_IB_MSG_1087 = 12912
+ER_IB_MSG_1088 = 12913
+ER_IB_MSG_1089 = 12914
+ER_IB_MSG_1090 = 12915
+ER_IB_MSG_1091 = 12916
+ER_IB_MSG_1092 = 12917
+ER_IB_MSG_1093 = 12918
+ER_IB_MSG_1094 = 12919
+ER_IB_MSG_1095 = 12920
+ER_IB_MSG_1096 = 12921
+ER_IB_MSG_1097 = 12922
+ER_IB_MSG_1098 = 12923
+ER_IB_MSG_1099 = 12924
+ER_IB_MSG_1100 = 12925
+ER_IB_MSG_1101 = 12926
+ER_IB_MSG_1102 = 12927
+ER_IB_MSG_1103 = 12928
+ER_IB_MSG_1104 = 12929
+ER_IB_MSG_1105 = 12930
+ER_IB_MSG_1106 = 12931
+ER_IB_MSG_1107 = 12932
+ER_IB_MSG_1108 = 12933
+ER_IB_MSG_1109 = 12934
+ER_IB_MSG_1110 = 12935
+ER_IB_MSG_1111 = 12936
+ER_IB_MSG_1112 = 12937
+ER_IB_MSG_1113 = 12938
+ER_IB_MSG_1114 = 12939
+ER_IB_MSG_1115 = 12940
+ER_IB_MSG_1116 = 12941
+ER_IB_MSG_1117 = 12942
+ER_IB_MSG_1118 = 12943
+ER_IB_MSG_1119 = 12944
+ER_IB_MSG_1120 = 12945
+ER_IB_MSG_1121 = 12946
+ER_IB_MSG_1122 = 12947
+ER_IB_MSG_1123 = 12948
+ER_IB_MSG_1124 = 12949
+ER_IB_MSG_1125 = 12950
+ER_IB_MSG_1126 = 12951
+ER_IB_MSG_1127 = 12952
+ER_IB_MSG_1128 = 12953
+ER_IB_MSG_1129 = 12954
+ER_IB_MSG_1130 = 12955
+ER_IB_MSG_1131 = 12956
+ER_IB_MSG_1132 = 12957
+ER_IB_MSG_1133 = 12958
+ER_IB_MSG_1134 = 12959
+ER_IB_MSG_1135 = 12960
+ER_IB_MSG_1136 = 12961
+ER_IB_MSG_1137 = 12962
+ER_IB_MSG_1138 = 12963
+ER_IB_MSG_1139 = 12964
+ER_IB_MSG_1140 = 12965
+ER_IB_MSG_1141 = 12966
+ER_IB_MSG_1142 = 12967
+ER_IB_MSG_1143 = 12968
+ER_IB_MSG_1144 = 12969
+ER_IB_MSG_1145 = 12970
+ER_IB_MSG_1146 = 12971
+ER_IB_MSG_1147 = 12972
+ER_IB_MSG_1148 = 12973
+ER_IB_MSG_1149 = 12974
+ER_IB_MSG_1150 = 12975
+ER_IB_MSG_1151 = 12976
+ER_IB_MSG_1152 = 12977
+ER_IB_MSG_1153 = 12978
+ER_IB_MSG_1154 = 12979
+ER_IB_MSG_1155 = 12980
+ER_IB_MSG_1156 = 12981
+ER_IB_MSG_1157 = 12982
+ER_IB_MSG_1158 = 12983
+ER_IB_MSG_1159 = 12984
+ER_IB_MSG_1160 = 12985
+ER_IB_MSG_1161 = 12986
+ER_IB_MSG_1162 = 12987
+ER_IB_MSG_1163 = 12988
+ER_IB_MSG_1164 = 12989
+ER_IB_MSG_1165 = 12990
+ER_IB_MSG_1166 = 12991
+ER_IB_MSG_1167 = 12992
+ER_IB_MSG_1168 = 12993
+ER_IB_MSG_1169 = 12994
+ER_IB_MSG_1170 = 12995
+ER_IB_MSG_1171 = 12996
+ER_IB_MSG_1172 = 12997
+ER_IB_MSG_1173 = 12998
+ER_IB_MSG_1174 = 12999
+ER_IB_MSG_1175 = 13000
+ER_IB_MSG_1176 = 13001
+ER_IB_MSG_1177 = 13002
+ER_IB_MSG_1178 = 13003
+ER_IB_MSG_1179 = 13004
+ER_IB_MSG_1180 = 13005
+ER_IB_MSG_1181 = 13006
+ER_IB_MSG_1182 = 13007
+ER_IB_MSG_1183 = 13008
+ER_IB_MSG_1184 = 13009
+ER_IB_MSG_1185 = 13010
+ER_IB_MSG_1186 = 13011
+ER_IB_MSG_1187 = 13012
+ER_IB_MSG_1188 = 13013
+ER_IB_MSG_1189 = 13014
+ER_IB_MSG_1190 = 13015
+ER_IB_MSG_1191 = 13016
+ER_IB_MSG_1192 = 13017
+ER_IB_MSG_1193 = 13018
+ER_IB_MSG_1194 = 13019
+ER_IB_MSG_1195 = 13020
+ER_IB_MSG_1196 = 13021
+ER_IB_MSG_1197 = 13022
+ER_IB_MSG_1198 = 13023
+ER_IB_MSG_1199 = 13024
+ER_IB_MSG_1200 = 13025
+ER_IB_MSG_1201 = 13026
+ER_IB_MSG_1202 = 13027
+ER_IB_MSG_1203 = 13028
+ER_IB_MSG_1204 = 13029
+ER_IB_MSG_1205 = 13030
+ER_IB_MSG_1206 = 13031
+ER_IB_MSG_1207 = 13032
+ER_IB_MSG_1208 = 13033
+ER_IB_MSG_1209 = 13034
+ER_IB_MSG_1210 = 13035
+ER_IB_MSG_1211 = 13036
+ER_IB_MSG_1212 = 13037
+ER_IB_MSG_1213 = 13038
+ER_IB_MSG_1214 = 13039
+ER_IB_MSG_1215 = 13040
+ER_IB_MSG_1216 = 13041
+ER_IB_MSG_1217 = 13042
+ER_IB_MSG_1218 = 13043
+ER_IB_MSG_1219 = 13044
+ER_IB_MSG_1220 = 13045
+ER_IB_MSG_1221 = 13046
+ER_IB_MSG_1222 = 13047
+ER_IB_MSG_1223 = 13048
+ER_IB_MSG_1224 = 13049
+ER_IB_MSG_1225 = 13050
+ER_IB_MSG_1226 = 13051
+ER_IB_MSG_1227 = 13052
+ER_IB_MSG_1228 = 13053
+ER_IB_MSG_1229 = 13054
+ER_IB_MSG_1230 = 13055
+ER_IB_MSG_1231 = 13056
+ER_IB_MSG_1232 = 13057
+ER_IB_MSG_1233 = 13058
+ER_IB_MSG_1234 = 13059
+ER_IB_MSG_1235 = 13060
+ER_IB_MSG_1236 = 13061
+ER_IB_MSG_1237 = 13062
+ER_IB_MSG_1238 = 13063
+ER_IB_MSG_1239 = 13064
+ER_IB_MSG_1240 = 13065
+ER_IB_MSG_1241 = 13066
+ER_IB_MSG_1242 = 13067
+ER_IB_MSG_1243 = 13068
+ER_IB_MSG_1244 = 13069
+ER_IB_MSG_1245 = 13070
+ER_IB_MSG_1246 = 13071
+ER_IB_MSG_1247 = 13072
+ER_IB_MSG_1248 = 13073
+ER_IB_MSG_1249 = 13074
+ER_IB_MSG_1250 = 13075
+ER_IB_MSG_1251 = 13076
+ER_IB_MSG_1252 = 13077
+ER_IB_MSG_1253 = 13078
+ER_IB_MSG_1254 = 13079
+ER_IB_MSG_1255 = 13080
+ER_IB_MSG_1256 = 13081
+ER_IB_MSG_1257 = 13082
+ER_IB_MSG_1258 = 13083
+ER_IB_MSG_1259 = 13084
+ER_IB_MSG_1260 = 13085
+ER_IB_MSG_1261 = 13086
+ER_IB_MSG_1262 = 13087
+ER_IB_MSG_1263 = 13088
+ER_IB_MSG_1264 = 13089
+ER_IB_MSG_1265 = 13090
+ER_IB_MSG_1266 = 13091
+ER_IB_MSG_1267 = 13092
+ER_IB_MSG_1268 = 13093
+ER_IB_MSG_1269 = 13094
+ER_IB_MSG_1270 = 13095
+ER_RPL_SLAVE_SQL_THREAD_STOP_CMD_EXEC_TIMEOUT = 13096
+ER_RPL_SLAVE_IO_THREAD_STOP_CMD_EXEC_TIMEOUT = 13097
+ER_RPL_GTID_UNSAFE_STMT_ON_NON_TRANS_TABLE = 13098
+ER_RPL_GTID_UNSAFE_STMT_CREATE_SELECT = 13099
+ER_RPL_GTID_UNSAFE_STMT_ON_TEMPORARY_TABLE = 13100
+ER_BINLOG_ROW_VALUE_OPTION_IGNORED = 13101
+ER_BINLOG_USE_V1_ROW_EVENTS_IGNORED = 13102
+ER_BINLOG_ROW_VALUE_OPTION_USED_ONLY_FOR_AFTER_IMAGES = 13103
+ER_CONNECTION_ABORTED = 13104
+ER_NORMAL_SERVER_SHUTDOWN = 13105
+ER_KEYRING_MIGRATE_FAILED = 13106
+ER_GRP_RPL_LOWER_CASE_TABLE_NAMES_DIFF_FROM_GRP = 13107
+ER_OOM_SAVE_GTIDS = 13108
+ER_LCTN_NOT_FOUND = 13109
+ER_REGEXP_INVALID_CAPTURE_GROUP_NAME = 13110
+ER_COMPONENT_FILTER_WRONG_VALUE = 13111
+ER_XPLUGIN_FAILED_TO_STOP_SERVICES = 13112
+ER_INCONSISTENT_ERROR = 13113
+ER_SERVER_MASTER_FATAL_ERROR_READING_BINLOG = 13114
+ER_NETWORK_READ_EVENT_CHECKSUM_FAILURE = 13115
+ER_SLAVE_CREATE_EVENT_FAILURE = 13116
+ER_SLAVE_FATAL_ERROR = 13117
+ER_SLAVE_HEARTBEAT_FAILURE = 13118
+ER_SLAVE_INCIDENT = 13119
+ER_SLAVE_MASTER_COM_FAILURE = 13120
+ER_SLAVE_RELAY_LOG_READ_FAILURE = 13121
+ER_SLAVE_RELAY_LOG_WRITE_FAILURE = 13122
+ER_SERVER_SLAVE_MI_INIT_REPOSITORY = 13123
+ER_SERVER_SLAVE_RLI_INIT_REPOSITORY = 13124
+ER_SERVER_NET_PACKET_TOO_LARGE = 13125
+ER_SERVER_NO_SYSTEM_TABLE_ACCESS = 13126
+ER_SERVER_UNKNOWN_ERROR = 13127
+ER_SERVER_UNKNOWN_SYSTEM_VARIABLE = 13128
+ER_SERVER_NO_SESSION_TO_SEND_TO = 13129
+ER_SERVER_NEW_ABORTING_CONNECTION = 13130
+ER_SERVER_OUT_OF_SORTMEMORY = 13131
+ER_SERVER_RECORD_FILE_FULL = 13132
+ER_SERVER_DISK_FULL_NOWAIT = 13133
+ER_SERVER_HANDLER_ERROR = 13134
+ER_SERVER_NOT_FORM_FILE = 13135
+ER_SERVER_CANT_OPEN_FILE = 13136
+ER_SERVER_FILE_NOT_FOUND = 13137
+ER_SERVER_FILE_USED = 13138
+ER_SERVER_CANNOT_LOAD_FROM_TABLE_V2 = 13139
+ER_ERROR_INFO_FROM_DA = 13140
+ER_SERVER_TABLE_CHECK_FAILED = 13141
+ER_SERVER_COL_COUNT_DOESNT_MATCH_PLEASE_UPDATE_V2 = 13142
+ER_SERVER_COL_COUNT_DOESNT_MATCH_CORRUPTED_V2 = 13143
+ER_SERVER_ACL_TABLE_ERROR = 13144
+ER_SERVER_SLAVE_INIT_QUERY_FAILED = 13145
+ER_SERVER_SLAVE_CONVERSION_FAILED = 13146
+ER_SERVER_SLAVE_IGNORED_TABLE = 13147
+ER_CANT_REPLICATE_ANONYMOUS_WITH_AUTO_POSITION = 13148
+ER_CANT_REPLICATE_ANONYMOUS_WITH_GTID_MODE_ON = 13149
+ER_CANT_REPLICATE_GTID_WITH_GTID_MODE_OFF = 13150
+ER_SERVER_TEST_MESSAGE = 13151
+ER_AUDIT_LOG_JSON_FILTER_PARSING_ERROR = 13152
+ER_AUDIT_LOG_JSON_FILTERING_NOT_ENABLED = 13153
+ER_PLUGIN_FAILED_TO_OPEN_TABLES = 13154
+ER_PLUGIN_FAILED_TO_OPEN_TABLE = 13155
+ER_AUDIT_LOG_JSON_FILTER_NAME_CANNOT_BE_EMPTY = 13156
+ER_AUDIT_LOG_USER_NAME_INVALID_CHARACTER = 13157
+ER_AUDIT_LOG_UDF_INSUFFICIENT_PRIVILEGE = 13158
+ER_AUDIT_LOG_NO_KEYRING_PLUGIN_INSTALLED = 13159
+ER_AUDIT_LOG_HOST_NAME_INVALID_CHARACTER = 13160
+ER_AUDIT_LOG_ENCRYPTION_PASSWORD_HAS_NOT_BEEN_SET = 13161
+ER_AUDIT_LOG_COULD_NOT_CREATE_AES_KEY = 13162
+ER_AUDIT_LOG_ENCRYPTION_PASSWORD_CANNOT_BE_FETCHED = 13163
+ER_COULD_NOT_REINITIALIZE_AUDIT_LOG_FILTERS = 13164
+ER_AUDIT_LOG_JSON_USER_NAME_CANNOT_BE_EMPTY = 13165
+ER_AUDIT_LOG_USER_FIRST_CHARACTER_MUST_BE_ALPHANUMERIC = 13166
+ER_AUDIT_LOG_JSON_FILTER_DOES_NOT_EXIST = 13167
+CR_UNKNOWN_ERROR = 2000
+CR_SOCKET_CREATE_ERROR = 2001
+CR_CONNECTION_ERROR = 2002
+CR_CONN_HOST_ERROR = 2003
+CR_IPSOCK_ERROR = 2004
+CR_UNKNOWN_HOST = 2005
+CR_SERVER_GONE_ERROR = 2006
+CR_VERSION_ERROR = 2007
+CR_OUT_OF_MEMORY = 2008
+CR_WRONG_HOST_INFO = 2009
+CR_LOCALHOST_CONNECTION = 2010
+CR_TCP_CONNECTION = 2011
+CR_SERVER_HANDSHAKE_ERR = 2012
+CR_SERVER_LOST = 2013
+CR_COMMANDS_OUT_OF_SYNC = 2014
+CR_NAMEDPIPE_CONNECTION = 2015
+CR_NAMEDPIPEWAIT_ERROR = 2016
+CR_NAMEDPIPEOPEN_ERROR = 2017
+CR_NAMEDPIPESETSTATE_ERROR = 2018
+CR_CANT_READ_CHARSET = 2019
+CR_NET_PACKET_TOO_LARGE = 2020
+CR_EMBEDDED_CONNECTION = 2021
+CR_PROBE_SLAVE_STATUS = 2022
+CR_PROBE_SLAVE_HOSTS = 2023
+CR_PROBE_SLAVE_CONNECT = 2024
+CR_PROBE_MASTER_CONNECT = 2025
+CR_SSL_CONNECTION_ERROR = 2026
+CR_MALFORMED_PACKET = 2027
+CR_WRONG_LICENSE = 2028
+CR_NULL_POINTER = 2029
+CR_NO_PREPARE_STMT = 2030
+CR_PARAMS_NOT_BOUND = 2031
+CR_DATA_TRUNCATED = 2032
+CR_NO_PARAMETERS_EXISTS = 2033
+CR_INVALID_PARAMETER_NO = 2034
+CR_INVALID_BUFFER_USE = 2035
+CR_UNSUPPORTED_PARAM_TYPE = 2036
+CR_SHARED_MEMORY_CONNECTION = 2037
+CR_SHARED_MEMORY_CONNECT_REQUEST_ERROR = 2038
+CR_SHARED_MEMORY_CONNECT_ANSWER_ERROR = 2039
+CR_SHARED_MEMORY_CONNECT_FILE_MAP_ERROR = 2040
+CR_SHARED_MEMORY_CONNECT_MAP_ERROR = 2041
+CR_SHARED_MEMORY_FILE_MAP_ERROR = 2042
+CR_SHARED_MEMORY_MAP_ERROR = 2043
+CR_SHARED_MEMORY_EVENT_ERROR = 2044
+CR_SHARED_MEMORY_CONNECT_ABANDONED_ERROR = 2045
+CR_SHARED_MEMORY_CONNECT_SET_ERROR = 2046
+CR_CONN_UNKNOW_PROTOCOL = 2047
+CR_INVALID_CONN_HANDLE = 2048
+CR_UNUSED_1 = 2049
+CR_FETCH_CANCELED = 2050
+CR_NO_DATA = 2051
+CR_NO_STMT_METADATA = 2052
+CR_NO_RESULT_SET = 2053
+CR_NOT_IMPLEMENTED = 2054
+CR_SERVER_LOST_EXTENDED = 2055
+CR_STMT_CLOSED = 2056
+CR_NEW_STMT_METADATA = 2057
+CR_ALREADY_CONNECTED = 2058
+CR_AUTH_PLUGIN_CANNOT_LOAD = 2059
+CR_DUPLICATE_CONNECTION_ATTR = 2060
+CR_AUTH_PLUGIN_ERR = 2061
+CR_INSECURE_API_ERR = 2062
+CR_FILE_NAME_TOO_LONG = 2063
+CR_SSL_FIPS_MODE_ERR = 2064
+# End MySQL Errors
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/errors.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/errors.py
new file mode 100644
index 0000000..4accce2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/errors.py
@@ -0,0 +1,307 @@
+# Copyright (c) 2009, 2018, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Python exceptions
+"""
+
+from . import utils
+from .locales import get_client_error
+from .catch23 import PY2
+
+# _CUSTOM_ERROR_EXCEPTIONS holds custom exceptions and is ued by the
+# function custom_error_exception. _ERROR_EXCEPTIONS (at bottom of module)
+# is similar, but hardcoded exceptions.
+_CUSTOM_ERROR_EXCEPTIONS = {}
+
+
+def custom_error_exception(error=None, exception=None):
+    """Define custom exceptions for MySQL server errors
+
+    This function defines custom exceptions for MySQL server errors and
+    returns the current set customizations.
+
+    If error is a MySQL Server error number, then you have to pass also the
+    exception class.
+
+    The error argument can also be a dictionary in which case the key is
+    the server error number, and value the exception to be raised.
+
+    If none of the arguments are given, then custom_error_exception() will
+    simply return the current set customizations.
+
+    To reset the customizations, simply supply an empty dictionary.
+
+    Examples:
+        import mysql.connector
+        from mysql.connector import errorcode
+
+        # Server error 1028 should raise a DatabaseError
+        mysql.connector.custom_error_exception(
+            1028, mysql.connector.DatabaseError)
+
+        # Or using a dictionary:
+        mysql.connector.custom_error_exception({
+            1028: mysql.connector.DatabaseError,
+            1029: mysql.connector.OperationalError,
+            })
+
+        # Reset
+        mysql.connector.custom_error_exception({})
+
+    Returns a dictionary.
+    """
+    global _CUSTOM_ERROR_EXCEPTIONS  # pylint: disable=W0603
+
+    if isinstance(error, dict) and not error:
+        _CUSTOM_ERROR_EXCEPTIONS = {}
+        return _CUSTOM_ERROR_EXCEPTIONS
+
+    if not error and not exception:
+        return _CUSTOM_ERROR_EXCEPTIONS
+
+    if not isinstance(error, (int, dict)):
+        raise ValueError(
+            "The error argument should be either an integer or dictionary")
+
+    if isinstance(error, int):
+        error = {error: exception}
+
+    for errno, _exception in error.items():
+        if not isinstance(errno, int):
+            raise ValueError("error number should be an integer")
+        try:
+            if not issubclass(_exception, Exception):
+                raise TypeError
+        except TypeError:
+            raise ValueError("exception should be subclass of Exception")
+        _CUSTOM_ERROR_EXCEPTIONS[errno] = _exception
+
+    return _CUSTOM_ERROR_EXCEPTIONS
+
+def get_mysql_exception(errno, msg=None, sqlstate=None):
+    """Get the exception matching the MySQL error
+
+    This function will return an exception based on the SQLState. The given
+    message will be passed on in the returned exception.
+
+    The exception returned can be customized using the
+    mysql.connector.custom_error_exception() function.
+
+    Returns an Exception
+    """
+    try:
+        return _CUSTOM_ERROR_EXCEPTIONS[errno](
+            msg=msg, errno=errno, sqlstate=sqlstate)
+    except KeyError:
+        # Error was not mapped to particular exception
+        pass
+
+    try:
+        return _ERROR_EXCEPTIONS[errno](
+            msg=msg, errno=errno, sqlstate=sqlstate)
+    except KeyError:
+        # Error was not mapped to particular exception
+        pass
+
+    if not sqlstate:
+        return DatabaseError(msg=msg, errno=errno)
+
+    try:
+        return _SQLSTATE_CLASS_EXCEPTION[sqlstate[0:2]](
+            msg=msg, errno=errno, sqlstate=sqlstate)
+    except KeyError:
+        # Return default InterfaceError
+        return DatabaseError(msg=msg, errno=errno, sqlstate=sqlstate)
+
+def get_exception(packet):
+    """Returns an exception object based on the MySQL error
+
+    Returns an exception object based on the MySQL error in the given
+    packet.
+
+    Returns an Error-Object.
+    """
+    errno = errmsg = None
+
+    try:
+        if packet[4] != 255:
+            raise ValueError("Packet is not an error packet")
+    except IndexError as err:
+        return InterfaceError("Failed getting Error information (%r)" % err)
+
+    sqlstate = None
+    try:
+        packet = packet[5:]
+        (packet, errno) = utils.read_int(packet, 2)
+        if packet[0] != 35:
+            # Error without SQLState
+            if isinstance(packet, (bytes, bytearray)):
+                errmsg = packet.decode('utf8')
+            else:
+                errmsg = packet
+        else:
+            (packet, sqlstate) = utils.read_bytes(packet[1:], 5)
+            sqlstate = sqlstate.decode('utf8')
+            errmsg = packet.decode('utf8')
+    except Exception as err:  # pylint: disable=W0703
+        return InterfaceError("Failed getting Error information (%r)" % err)
+    else:
+        return get_mysql_exception(errno, errmsg, sqlstate)
+
+
+class Error(Exception):
+    """Exception that is base class for all other error exceptions"""
+    def __init__(self, msg=None, errno=None, values=None, sqlstate=None):
+        super(Error, self).__init__()
+        self.msg = msg
+        self._full_msg = self.msg
+        self.errno = errno or -1
+        self.sqlstate = sqlstate
+
+        if not self.msg and (2000 <= self.errno < 3000):
+            self.msg = get_client_error(self.errno)
+            if values is not None:
+                try:
+                    self.msg = self.msg % values
+                except TypeError as err:
+                    self.msg = "{0} (Warning: {1})".format(self.msg, str(err))
+        elif not self.msg:
+            self._full_msg = self.msg = 'Unknown error'
+
+        if self.msg and self.errno != -1:
+            fields = {
+                'errno': self.errno,
+                'msg': self.msg.encode('utf8') if PY2 else self.msg
+            }
+            if self.sqlstate:
+                fmt = '{errno} ({state}): {msg}'
+                fields['state'] = self.sqlstate
+            else:
+                fmt = '{errno}: {msg}'
+            self._full_msg = fmt.format(**fields)
+
+        self.args = (self.errno, self._full_msg, self.sqlstate)
+
+    def __str__(self):
+        return self._full_msg
+
+
+class Warning(Exception):  # pylint: disable=W0622
+    """Exception for important warnings"""
+    pass
+
+
+class InterfaceError(Error):
+    """Exception for errors related to the interface"""
+    pass
+
+
+class DatabaseError(Error):
+    """Exception for errors related to the database"""
+    pass
+
+
+class InternalError(DatabaseError):
+    """Exception for errors internal database errors"""
+    pass
+
+
+class OperationalError(DatabaseError):
+    """Exception for errors related to the database's operation"""
+    pass
+
+
+class ProgrammingError(DatabaseError):
+    """Exception for errors programming errors"""
+    pass
+
+
+class IntegrityError(DatabaseError):
+    """Exception for errors regarding relational integrity"""
+    pass
+
+
+class DataError(DatabaseError):
+    """Exception for errors reporting problems with processed data"""
+    pass
+
+
+class NotSupportedError(DatabaseError):
+    """Exception for errors when an unsupported database feature was used"""
+    pass
+
+
+class PoolError(Error):
+    """Exception for errors relating to connection pooling"""
+    pass
+
+
+_SQLSTATE_CLASS_EXCEPTION = {
+    '02': DataError,  # no data
+    '07': DatabaseError,  # dynamic SQL error
+    '08': OperationalError,  # connection exception
+    '0A': NotSupportedError,  # feature not supported
+    '21': DataError,  # cardinality violation
+    '22': DataError,  # data exception
+    '23': IntegrityError,  # integrity constraint violation
+    '24': ProgrammingError,  # invalid cursor state
+    '25': ProgrammingError,  # invalid transaction state
+    '26': ProgrammingError,  # invalid SQL statement name
+    '27': ProgrammingError,  # triggered data change violation
+    '28': ProgrammingError,  # invalid authorization specification
+    '2A': ProgrammingError,  # direct SQL syntax error or access rule violation
+    '2B': DatabaseError,  # dependent privilege descriptors still exist
+    '2C': ProgrammingError,  # invalid character set name
+    '2D': DatabaseError,  # invalid transaction termination
+    '2E': DatabaseError,  # invalid connection name
+    '33': DatabaseError,  # invalid SQL descriptor name
+    '34': ProgrammingError,  # invalid cursor name
+    '35': ProgrammingError,  # invalid condition number
+    '37': ProgrammingError,  # dynamic SQL syntax error or access rule violation
+    '3C': ProgrammingError,  # ambiguous cursor name
+    '3D': ProgrammingError,  # invalid catalog name
+    '3F': ProgrammingError,  # invalid schema name
+    '40': InternalError,  # transaction rollback
+    '42': ProgrammingError,  # syntax error or access rule violation
+    '44': InternalError,   # with check option violation
+    'HZ': OperationalError,  # remote database access
+    'XA': IntegrityError,
+    '0K': OperationalError,
+    'HY': DatabaseError,  # default when no SQLState provided by MySQL server
+}
+
+_ERROR_EXCEPTIONS = {
+    1243: ProgrammingError,
+    1210: ProgrammingError,
+    2002: InterfaceError,
+    2013: OperationalError,
+    2049: NotSupportedError,
+    2055: OperationalError,
+    2061: InterfaceError,
+    2026: InterfaceError,
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/__init__.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/__init__.py
new file mode 100644
index 0000000..c1a737b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/__init__.py
@@ -0,0 +1,75 @@
+# Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Translations
+"""
+
+__all__ = [
+    'get_client_error'
+]
+
+from .. import errorcode
+
+def get_client_error(error, language='eng'):
+    """Lookup client error
+
+    This function will lookup the client error message based on the given
+    error and return the error message. If the error was not found,
+    None will be returned.
+
+    Error can be either an integer or a string. For example:
+        error: 2000
+        error: CR_UNKNOWN_ERROR
+
+    The language attribute can be used to retrieve a localized message, when
+    available.
+
+    Returns a string or None.
+    """
+    try:
+        tmp = __import__('mysql.connector.locales.{0}'.format(language),
+                         globals(), locals(), ['client_error'])
+    except ImportError:
+        raise ImportError("No localization support for language '{0}'".format(
+            language))
+    client_error = tmp.client_error
+
+    if isinstance(error, int):
+        errno = error
+        for key, value in errorcode.__dict__.items():
+            if value == errno:
+                error = key
+                break
+
+    if isinstance(error, (str)):
+        try:
+            return getattr(client_error, error)
+        except AttributeError:
+            return None
+
+    raise ValueError("error argument needs to be either an integer or string")
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..64df1b8
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diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/eng/__init__.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/eng/__init__.py
new file mode 100644
index 0000000..2e1c02b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/eng/__init__.py
@@ -0,0 +1,30 @@
+# Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""English Content
+"""
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/eng/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/eng/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/eng/__pycache__/client_error.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/eng/__pycache__/client_error.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/eng/client_error.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/eng/client_error.py
new file mode 100644
index 0000000..a9ed8b9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/locales/eng/client_error.py
@@ -0,0 +1,102 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# This file was auto-generated.
+_GENERATED_ON = '2018-03-16'
+_MYSQL_VERSION = (8, 0, 11)
+
+# Start MySQL Error messages
+CR_UNKNOWN_ERROR = u"Unknown MySQL error"
+CR_SOCKET_CREATE_ERROR = u"Can't create UNIX socket (%s)"
+CR_CONNECTION_ERROR = u"Can't connect to local MySQL server through socket '%-.100s' (%s)"
+CR_CONN_HOST_ERROR = u"Can't connect to MySQL server on '%-.100s' (%s)"
+CR_IPSOCK_ERROR = u"Can't create TCP/IP socket (%s)"
+CR_UNKNOWN_HOST = u"Unknown MySQL server host '%-.100s' (%s)"
+CR_SERVER_GONE_ERROR = u"MySQL server has gone away"
+CR_VERSION_ERROR = u"Protocol mismatch; server version = %s, client version = %s"
+CR_OUT_OF_MEMORY = u"MySQL client ran out of memory"
+CR_WRONG_HOST_INFO = u"Wrong host info"
+CR_LOCALHOST_CONNECTION = u"Localhost via UNIX socket"
+CR_TCP_CONNECTION = u"%-.100s via TCP/IP"
+CR_SERVER_HANDSHAKE_ERR = u"Error in server handshake"
+CR_SERVER_LOST = u"Lost connection to MySQL server during query"
+CR_COMMANDS_OUT_OF_SYNC = u"Commands out of sync; you can't run this command now"
+CR_NAMEDPIPE_CONNECTION = u"Named pipe: %-.32s"
+CR_NAMEDPIPEWAIT_ERROR = u"Can't wait for named pipe to host: %-.64s  pipe: %-.32s (%s)"
+CR_NAMEDPIPEOPEN_ERROR = u"Can't open named pipe to host: %-.64s  pipe: %-.32s (%s)"
+CR_NAMEDPIPESETSTATE_ERROR = u"Can't set state of named pipe to host: %-.64s  pipe: %-.32s (%s)"
+CR_CANT_READ_CHARSET = u"Can't initialize character set %-.32s (path: %-.100s)"
+CR_NET_PACKET_TOO_LARGE = u"Got packet bigger than 'max_allowed_packet' bytes"
+CR_EMBEDDED_CONNECTION = u"Embedded server"
+CR_PROBE_SLAVE_STATUS = u"Error on SHOW SLAVE STATUS:"
+CR_PROBE_SLAVE_HOSTS = u"Error on SHOW SLAVE HOSTS:"
+CR_PROBE_SLAVE_CONNECT = u"Error connecting to slave:"
+CR_PROBE_MASTER_CONNECT = u"Error connecting to master:"
+CR_SSL_CONNECTION_ERROR = u"SSL connection error: %-.100s"
+CR_MALFORMED_PACKET = u"Malformed packet"
+CR_WRONG_LICENSE = u"This client library is licensed only for use with MySQL servers having '%s' license"
+CR_NULL_POINTER = u"Invalid use of null pointer"
+CR_NO_PREPARE_STMT = u"Statement not prepared"
+CR_PARAMS_NOT_BOUND = u"No data supplied for parameters in prepared statement"
+CR_DATA_TRUNCATED = u"Data truncated"
+CR_NO_PARAMETERS_EXISTS = u"No parameters exist in the statement"
+CR_INVALID_PARAMETER_NO = u"Invalid parameter number"
+CR_INVALID_BUFFER_USE = u"Can't send long data for non-string/non-binary data types (parameter: %s)"
+CR_UNSUPPORTED_PARAM_TYPE = u"Using unsupported buffer type: %s  (parameter: %s)"
+CR_SHARED_MEMORY_CONNECTION = u"Shared memory: %-.100s"
+CR_SHARED_MEMORY_CONNECT_REQUEST_ERROR = u"Can't open shared memory; client could not create request event (%s)"
+CR_SHARED_MEMORY_CONNECT_ANSWER_ERROR = u"Can't open shared memory; no answer event received from server (%s)"
+CR_SHARED_MEMORY_CONNECT_FILE_MAP_ERROR = u"Can't open shared memory; server could not allocate file mapping (%s)"
+CR_SHARED_MEMORY_CONNECT_MAP_ERROR = u"Can't open shared memory; server could not get pointer to file mapping (%s)"
+CR_SHARED_MEMORY_FILE_MAP_ERROR = u"Can't open shared memory; client could not allocate file mapping (%s)"
+CR_SHARED_MEMORY_MAP_ERROR = u"Can't open shared memory; client could not get pointer to file mapping (%s)"
+CR_SHARED_MEMORY_EVENT_ERROR = u"Can't open shared memory; client could not create %s event (%s)"
+CR_SHARED_MEMORY_CONNECT_ABANDONED_ERROR = u"Can't open shared memory; no answer from server (%s)"
+CR_SHARED_MEMORY_CONNECT_SET_ERROR = u"Can't open shared memory; cannot send request event to server (%s)"
+CR_CONN_UNKNOW_PROTOCOL = u"Wrong or unknown protocol"
+CR_INVALID_CONN_HANDLE = u"Invalid connection handle"
+CR_UNUSED_1 = u"Connection using old (pre-4.1.1) authentication protocol refused (client option 'secure_auth' enabled)"
+CR_FETCH_CANCELED = u"Row retrieval was canceled by mysql_stmt_close() call"
+CR_NO_DATA = u"Attempt to read column without prior row fetch"
+CR_NO_STMT_METADATA = u"Prepared statement contains no metadata"
+CR_NO_RESULT_SET = u"Attempt to read a row while there is no result set associated with the statement"
+CR_NOT_IMPLEMENTED = u"This feature is not implemented yet"
+CR_SERVER_LOST_EXTENDED = u"Lost connection to MySQL server at '%s', system error: %s"
+CR_STMT_CLOSED = u"Statement closed indirectly because of a preceding %s() call"
+CR_NEW_STMT_METADATA = u"The number of columns in the result set differs from the number of bound buffers. You must reset the statement, rebind the result set columns, and execute the statement again"
+CR_ALREADY_CONNECTED = u"This handle is already connected. Use a separate handle for each connection."
+CR_AUTH_PLUGIN_CANNOT_LOAD = u"Authentication plugin '%s' cannot be loaded: %s"
+CR_DUPLICATE_CONNECTION_ATTR = u"There is an attribute with the same name already"
+CR_AUTH_PLUGIN_ERR = u"Authentication plugin '%s' reported error: %s"
+CR_INSECURE_API_ERR = u"Insecure API function call: '%s' Use instead: '%s'"
+CR_FILE_NAME_TOO_LONG = u"File name is too long"
+CR_SSL_FIPS_MODE_ERR = u"Set FIPS mode ON/STRICT failed"
+# End MySQL Error messages
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/network.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/network.py
new file mode 100644
index 0000000..bc3ddc7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/network.py
@@ -0,0 +1,612 @@
+# Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Module implementing low-level socket communication with MySQL servers.
+"""
+
+from collections import deque
+import os
+import socket
+import struct
+import sys
+import zlib
+
+try:
+    import ssl
+    TLS_VERSIONS = {
+        "TLSv1": ssl.PROTOCOL_TLSv1,
+        "TLSv1.1": ssl.PROTOCOL_TLSv1_1,
+        "TLSv1.2": ssl.PROTOCOL_TLSv1_2}
+    # TLSv1.3 included in PROTOCOL_TLS, but PROTOCOL_TLS is not included on 3.4
+    if hasattr(ssl, "PROTOCOL_TLS"):
+        TLS_VERSIONS["TLSv1.3"] = ssl.PROTOCOL_TLS  # pylint: disable=E1101
+    else:
+        TLS_VERSIONS["TLSv1.3"] = ssl.PROTOCOL_SSLv23  # Alias of PROTOCOL_TLS
+    if hasattr(ssl, "HAS_TLSv1_3") and ssl.HAS_TLSv1_3: 
+        TLS_V1_3_SUPPORTED = True
+    else:
+        TLS_V1_3_SUPPORTED = False
+except:
+    # If import fails, we don't have SSL support.
+    TLS_V1_3_SUPPORTED = False
+    pass
+
+from . import constants, errors
+from .errors import InterfaceError
+from .catch23 import PY2, init_bytearray, struct_unpack
+
+
+def _strioerror(err):
+    """Reformat the IOError error message
+
+    This function reformats the IOError error message.
+    """
+    if not err.errno:
+        return str(err)
+    return '{errno} {strerr}'.format(errno=err.errno, strerr=err.strerror)
+
+
+def _prepare_packets(buf, pktnr):
+    """Prepare a packet for sending to the MySQL server"""
+    pkts = []
+    pllen = len(buf)
+    maxpktlen = constants.MAX_PACKET_LENGTH
+    while pllen > maxpktlen:
+        pkts.append(b'\xff\xff\xff' + struct.pack('<B', pktnr)
+                    + buf[:maxpktlen])
+        buf = buf[maxpktlen:]
+        pllen = len(buf)
+        pktnr = pktnr + 1
+    pkts.append(struct.pack('<I', pllen)[0:3]
+                + struct.pack('<B', pktnr) + buf)
+    return pkts
+
+
+class BaseMySQLSocket(object):
+    """Base class for MySQL socket communication
+
+    This class should not be used directly but overloaded, changing the
+    at least the open_connection()-method. Examples of subclasses are
+      mysql.connector.network.MySQLTCPSocket
+      mysql.connector.network.MySQLUnixSocket
+    """
+
+    def __init__(self):
+        self.sock = None  # holds the socket connection
+        self._connection_timeout = None
+        self._packet_number = -1
+        self._compressed_packet_number = -1
+        self._packet_queue = deque()
+        self.recvsize = 8192
+
+    @property
+    def next_packet_number(self):
+        """Increments the packet number"""
+        self._packet_number = self._packet_number + 1
+        if self._packet_number > 255:
+            self._packet_number = 0
+        return self._packet_number
+
+    @property
+    def next_compressed_packet_number(self):
+        """Increments the compressed packet number"""
+        self._compressed_packet_number = self._compressed_packet_number + 1
+        if self._compressed_packet_number > 255:
+            self._compressed_packet_number = 0
+        return self._compressed_packet_number
+
+    def open_connection(self):
+        """Open the socket"""
+        raise NotImplementedError
+
+    def get_address(self):
+        """Get the location of the socket"""
+        raise NotImplementedError
+
+    def shutdown(self):
+        """Shut down the socket before closing it"""
+        try:
+            self.sock.shutdown(socket.SHUT_RDWR)
+            self.sock.close()
+            del self._packet_queue
+        except (socket.error, AttributeError):
+            pass
+
+    def close_connection(self):
+        """Close the socket"""
+        try:
+            self.sock.close()
+            del self._packet_queue
+        except (socket.error, AttributeError):
+            pass
+
+    def __del__(self):
+        self.shutdown()
+
+    def send_plain(self, buf, packet_number=None,
+                   compressed_packet_number=None):
+        """Send packets to the MySQL server"""
+        if packet_number is None:
+            self.next_packet_number  # pylint: disable=W0104
+        else:
+            self._packet_number = packet_number
+        packets = _prepare_packets(buf, self._packet_number)
+        for packet in packets:
+            try:
+                if PY2:
+                    self.sock.sendall(buffer(packet))  # pylint: disable=E0602
+                else:
+                    self.sock.sendall(packet)
+            except IOError as err:
+                raise errors.OperationalError(
+                    errno=2055, values=(self.get_address(), _strioerror(err)))
+            except AttributeError:
+                raise errors.OperationalError(errno=2006)
+
+    send = send_plain
+
+    def send_compressed(self, buf, packet_number=None,
+                        compressed_packet_number=None):
+        """Send compressed packets to the MySQL server"""
+        if packet_number is None:
+            self.next_packet_number  # pylint: disable=W0104
+        else:
+            self._packet_number = packet_number
+        if compressed_packet_number is None:
+            self.next_compressed_packet_number  # pylint: disable=W0104
+        else:
+            self._compressed_packet_number = compressed_packet_number
+
+        pktnr = self._packet_number
+        pllen = len(buf)
+        zpkts = []
+        maxpktlen = constants.MAX_PACKET_LENGTH
+        if pllen > maxpktlen:
+            pkts = _prepare_packets(buf, pktnr)
+            if PY2:
+                tmpbuf = bytearray()
+                for pkt in pkts:
+                    tmpbuf += pkt
+                tmpbuf = buffer(tmpbuf)  # pylint: disable=E0602
+            else:
+                tmpbuf = b''.join(pkts)
+            del pkts
+            zbuf = zlib.compress(tmpbuf[:16384])
+            header = (struct.pack('<I', len(zbuf))[0:3]
+                      + struct.pack('<B', self._compressed_packet_number)
+                      + b'\x00\x40\x00')
+            if PY2:
+                header = buffer(header)  # pylint: disable=E0602
+            zpkts.append(header + zbuf)
+            tmpbuf = tmpbuf[16384:]
+            pllen = len(tmpbuf)
+            self.next_compressed_packet_number  # pylint: disable=W0104
+            while pllen > maxpktlen:
+                zbuf = zlib.compress(tmpbuf[:maxpktlen])
+                header = (struct.pack('<I', len(zbuf))[0:3]
+                          + struct.pack('<B', self._compressed_packet_number)
+                          + b'\xff\xff\xff')
+                if PY2:
+                    header = buffer(header)  # pylint: disable=E0602
+                zpkts.append(header + zbuf)
+                tmpbuf = tmpbuf[maxpktlen:]
+                pllen = len(tmpbuf)
+                self.next_compressed_packet_number  # pylint: disable=W0104
+            if tmpbuf:
+                zbuf = zlib.compress(tmpbuf)
+                header = (struct.pack('<I', len(zbuf))[0:3]
+                          + struct.pack('<B', self._compressed_packet_number)
+                          + struct.pack('<I', pllen)[0:3])
+                if PY2:
+                    header = buffer(header)  # pylint: disable=E0602
+                zpkts.append(header + zbuf)
+            del tmpbuf
+        else:
+            pkt = (struct.pack('<I', pllen)[0:3] +
+                   struct.pack('<B', pktnr) + buf)
+            if PY2:
+                pkt = buffer(pkt)  # pylint: disable=E0602
+            pllen = len(pkt)
+            if pllen > 50:
+                zbuf = zlib.compress(pkt)
+                zpkts.append(struct.pack('<I', len(zbuf))[0:3]
+                             + struct.pack('<B', self._compressed_packet_number)
+                             + struct.pack('<I', pllen)[0:3]
+                             + zbuf)
+            else:
+                header = (struct.pack('<I', pllen)[0:3]
+                          + struct.pack('<B', self._compressed_packet_number)
+                          + struct.pack('<I', 0)[0:3])
+                if PY2:
+                    header = buffer(header)  # pylint: disable=E0602
+                zpkts.append(header + pkt)
+
+        for zip_packet in zpkts:
+            try:
+                self.sock.sendall(zip_packet)
+            except IOError as err:
+                raise errors.OperationalError(
+                    errno=2055, values=(self.get_address(), _strioerror(err)))
+            except AttributeError:
+                raise errors.OperationalError(errno=2006)
+
+    def recv_plain(self):
+        """Receive packets from the MySQL server"""
+        try:
+            # Read the header of the MySQL packet, 4 bytes
+            packet = bytearray(b'')
+            packet_len = 0
+            while packet_len < 4:
+                chunk = self.sock.recv(4 - packet_len)
+                if not chunk:
+                    raise errors.InterfaceError(errno=2013)
+                packet += chunk
+                packet_len = len(packet)
+
+            # Save the packet number and payload length
+            self._packet_number = packet[3]
+            if PY2:
+                payload_len = struct.unpack_from(
+                    "<I",
+                    buffer(packet[0:3] + b'\x00'))[0]  # pylint: disable=E0602
+            else:
+                payload_len = struct.unpack("<I", packet[0:3] + b'\x00')[0]
+
+            # Read the payload
+            rest = payload_len
+            packet.extend(bytearray(payload_len))
+            packet_view = memoryview(packet)  # pylint: disable=E0602
+            packet_view = packet_view[4:]
+            while rest:
+                read = self.sock.recv_into(packet_view, rest)
+                if read == 0 and rest > 0:
+                    raise errors.InterfaceError(errno=2013)
+                packet_view = packet_view[read:]
+                rest -= read
+            return packet
+        except IOError as err:
+            raise errors.OperationalError(
+                errno=2055, values=(self.get_address(), _strioerror(err)))
+
+    def recv_py26_plain(self):
+        """Receive packets from the MySQL server"""
+        try:
+            # Read the header of the MySQL packet, 4 bytes
+            header = bytearray(b'')
+            header_len = 0
+            while header_len < 4:
+                chunk = self.sock.recv(4 - header_len)
+                if not chunk:
+                    raise errors.InterfaceError(errno=2013)
+                header += chunk
+                header_len = len(header)
+
+            # Save the packet number and payload length
+            self._packet_number = header[3]
+            payload_len = struct_unpack("<I", header[0:3] + b'\x00')[0]
+
+            # Read the payload
+            rest = payload_len
+            payload = init_bytearray(b'')
+            while rest > 0:
+                chunk = self.sock.recv(rest)
+                if not chunk:
+                    raise errors.InterfaceError(errno=2013)
+                payload += chunk
+                rest = payload_len - len(payload)
+            return header + payload
+        except IOError as err:
+            raise errors.OperationalError(
+                errno=2055, values=(self.get_address(), _strioerror(err)))
+
+    if sys.version_info[0:2] == (2, 6):
+        recv = recv_py26_plain
+        recv_plain = recv_py26_plain
+    else:
+        recv = recv_plain
+
+    def _split_zipped_payload(self, packet_bunch):
+        """Split compressed payload"""
+        while packet_bunch:
+            if PY2:
+                payload_length = struct.unpack_from(
+                    "<I",
+                    packet_bunch[0:3] + b'\x00')[0]  # pylint: disable=E0602
+            else:
+                payload_length = struct.unpack("<I", packet_bunch[0:3] + b'\x00')[0]
+
+            self._packet_queue.append(packet_bunch[0:payload_length + 4])
+            packet_bunch = packet_bunch[payload_length + 4:]
+
+    def recv_compressed(self):
+        """Receive compressed packets from the MySQL server"""
+        try:
+            pkt = self._packet_queue.popleft()
+            self._packet_number = pkt[3]
+            return pkt
+        except IndexError:
+            pass
+
+        header = bytearray(b'')
+        packets = []
+        try:
+            abyte = self.sock.recv(1)
+            while abyte and len(header) < 7:
+                header += abyte
+                abyte = self.sock.recv(1)
+            while header:
+                if len(header) < 7:
+                    raise errors.InterfaceError(errno=2013)
+
+                # Get length of compressed packet
+                zip_payload_length = struct_unpack("<I",
+                                                   header[0:3] + b'\x00')[0]
+                self._compressed_packet_number = header[3]
+
+                # Get payload length before compression
+                payload_length = struct_unpack("<I", header[4:7] + b'\x00')[0]
+
+                zip_payload = init_bytearray(abyte)
+                while len(zip_payload) < zip_payload_length:
+                    chunk = self.sock.recv(zip_payload_length
+                                           - len(zip_payload))
+                    if not chunk:
+                        raise errors.InterfaceError(errno=2013)
+                    zip_payload = zip_payload + chunk
+
+                # Payload was not compressed
+                if payload_length == 0:
+                    self._split_zipped_payload(zip_payload)
+                    pkt = self._packet_queue.popleft()
+                    self._packet_number = pkt[3]
+                    return pkt
+
+                packets.append((payload_length, zip_payload))
+
+                if zip_payload_length <= 16384:
+                    # We received the full compressed packet
+                    break
+
+                # Get next compressed packet
+                header = init_bytearray(b'')
+                abyte = self.sock.recv(1)
+                while abyte and len(header) < 7:
+                    header += abyte
+                    abyte = self.sock.recv(1)
+
+        except IOError as err:
+            raise errors.OperationalError(
+                errno=2055, values=(self.get_address(), _strioerror(err)))
+
+        # Compressed packet can contain more than 1 MySQL packets
+        # We decompress and make one so we can split it up
+        tmp = init_bytearray(b'')
+        for payload_length, payload in packets:
+            # payload_length can not be 0; this was previously handled
+            if PY2:
+                tmp += zlib.decompress(buffer(payload))  # pylint: disable=E0602
+            else:
+                tmp += zlib.decompress(payload)
+        self._split_zipped_payload(tmp)
+        del tmp
+
+        try:
+            pkt = self._packet_queue.popleft()
+            self._packet_number = pkt[3]
+            return pkt
+        except IndexError:
+            pass
+
+    def set_connection_timeout(self, timeout):
+        """Set the connection timeout"""
+        self._connection_timeout = timeout
+        if self.sock:
+            self.sock.settimeout(timeout)
+
+    # pylint: disable=C0103,E1101
+    def switch_to_ssl(self, ca, cert, key, verify_cert=False,
+                      verify_identity=False, cipher_suites=None,
+                      tls_versions=None):
+        """Switch the socket to use SSL"""
+        if not self.sock:
+            raise errors.InterfaceError(errno=2048)
+
+        try:
+            if verify_cert:
+                cert_reqs = ssl.CERT_REQUIRED
+            elif verify_identity:
+                cert_reqs = ssl.CERT_OPTIONAL
+            else:
+                cert_reqs = ssl.CERT_NONE
+
+            if tls_versions is None or not tls_versions:
+                context = ssl.create_default_context()
+                if not verify_identity:
+                    context.check_hostname = False
+            else:
+                tls_versions.sort(reverse=True)
+
+                tls_version = tls_versions[0]
+                if not TLS_V1_3_SUPPORTED and \
+                   tls_version == "TLSv1.3" and len(tls_versions) > 1:
+                    tls_version = tls_versions[1]
+                ssl_protocol = TLS_VERSIONS[tls_version]
+                context = ssl.SSLContext(ssl_protocol)
+
+                if tls_version == "TLSv1.3":
+                    if "TLSv1.2" not in tls_versions:
+                        context.options |= ssl.OP_NO_TLSv1_2
+                    if "TLSv1.1" not in tls_versions:
+                        context.options |= ssl.OP_NO_TLSv1_1
+                    if "TLSv1" not in tls_versions:
+                        context.options |= ssl.OP_NO_TLSv1
+
+            context.check_hostname = False
+            context.verify_mode = cert_reqs
+            context.load_default_certs()
+
+            if ca:
+                try:
+                    context.load_verify_locations(ca)
+                except (IOError, ssl.SSLError) as err:
+                    self.sock.close()
+                    raise InterfaceError(
+                        "Invalid CA Certificate: {}".format(err))
+            if cert:
+                try:
+                    context.load_cert_chain(cert, key)
+                except (IOError, ssl.SSLError) as err:
+                    self.sock.close()
+                    raise InterfaceError(
+                        "Invalid Certificate/Key: {}".format(err))
+            if cipher_suites:
+                context.set_ciphers(cipher_suites)
+
+            if hasattr(self, "server_host"):
+                self.sock = context.wrap_socket(
+                    self.sock, server_hostname=self.server_host)
+            else:
+                self.sock = context.wrap_socket(self.sock)
+
+            if verify_identity:
+                context.check_hostname = True
+                hostnames = [self.server_host]
+                if os.name == 'nt' and self.server_host == 'localhost':
+                    hostnames = ['localhost', '127.0.0.1']
+                    aliases = socket.gethostbyaddr(self.server_host)
+                    hostnames.extend([aliases[0]] + aliases[1])
+                match_found = False
+                errs = []
+                for hostname in hostnames:
+                    try:
+                        ssl.match_hostname(self.sock.getpeercert(), hostname)
+                    except ssl.CertificateError as err:
+                        errs.append(str(err))
+                    else:
+                        match_found = True
+                        break
+                if not match_found:
+                    self.sock.close()
+                    raise InterfaceError("Unable to verify server identity: {}"
+                                         "".format(", ".join(errs)))
+        except NameError:
+            raise errors.NotSupportedError(
+                "Python installation has no SSL support")
+        except (ssl.SSLError, IOError) as err:
+            raise errors.InterfaceError(
+                errno=2055, values=(self.get_address(), _strioerror(err)))
+        except ssl.CertificateError as err:
+            raise errors.InterfaceError(str(err))
+        except NotImplementedError as err:
+            raise errors.InterfaceError(str(err))
+
+
+# pylint: enable=C0103,E1101
+
+
+class MySQLUnixSocket(BaseMySQLSocket):
+    """MySQL socket class using UNIX sockets
+
+    Opens a connection through the UNIX socket of the MySQL Server.
+    """
+
+    def __init__(self, unix_socket='/tmp/mysql.sock'):
+        super(MySQLUnixSocket, self).__init__()
+        self.unix_socket = unix_socket
+
+    def get_address(self):
+        return self.unix_socket
+
+    def open_connection(self):
+        try:
+            self.sock = socket.socket(socket.AF_UNIX, # pylint: disable=E1101
+                                      socket.SOCK_STREAM)
+            self.sock.settimeout(self._connection_timeout)
+            self.sock.connect(self.unix_socket)
+        except IOError as err:
+            raise errors.InterfaceError(
+                errno=2002, values=(self.get_address(), _strioerror(err)))
+        except Exception as err:
+            raise errors.InterfaceError(str(err))
+
+
+class MySQLTCPSocket(BaseMySQLSocket):
+    """MySQL socket class using TCP/IP
+
+    Opens a TCP/IP connection to the MySQL Server.
+    """
+
+    def __init__(self, host='127.0.0.1', port=3306, force_ipv6=False):
+        super(MySQLTCPSocket, self).__init__()
+        self.server_host = host
+        self.server_port = port
+        self.force_ipv6 = force_ipv6
+        self._family = 0
+
+    def get_address(self):
+        return "{0}:{1}".format(self.server_host, self.server_port)
+
+    def open_connection(self):
+        """Open the TCP/IP connection to the MySQL server
+        """
+        # Get address information
+        addrinfo = [None] * 5
+        try:
+            addrinfos = socket.getaddrinfo(self.server_host,
+                                           self.server_port,
+                                           0, socket.SOCK_STREAM,
+                                           socket.SOL_TCP)
+            # If multiple results we favor IPv4, unless IPv6 was forced.
+            for info in addrinfos:
+                if self.force_ipv6 and info[0] == socket.AF_INET6:
+                    addrinfo = info
+                    break
+                elif info[0] == socket.AF_INET:
+                    addrinfo = info
+                    break
+            if self.force_ipv6 and addrinfo[0] is None:
+                raise errors.InterfaceError(
+                    "No IPv6 address found for {0}".format(self.server_host))
+            if addrinfo[0] is None:
+                addrinfo = addrinfos[0]
+        except IOError as err:
+            raise errors.InterfaceError(
+                errno=2003, values=(self.get_address(), _strioerror(err)))
+        else:
+            (self._family, socktype, proto, _, sockaddr) = addrinfo
+
+        # Instanciate the socket and connect
+        try:
+            self.sock = socket.socket(self._family, socktype, proto)
+            self.sock.settimeout(self._connection_timeout)
+            self.sock.connect(sockaddr)
+        except IOError as err:
+            raise errors.InterfaceError(
+                errno=2003, values=(self.get_address(), _strioerror(err)))
+        except Exception as err:
+            raise errors.OperationalError(str(err))
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/optionfiles.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/optionfiles.py
new file mode 100644
index 0000000..321b311
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/optionfiles.py
@@ -0,0 +1,345 @@
+# Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implements parser to parse MySQL option files.
+"""
+
+import codecs
+import io
+import os
+import re
+
+from .catch23 import PY2
+from .constants import DEFAULT_CONFIGURATION, CNX_POOL_ARGS
+
+# pylint: disable=F0401
+if PY2:
+    from ConfigParser import SafeConfigParser, MissingSectionHeaderError
+else:
+    from configparser import (ConfigParser as SafeConfigParser,
+                              MissingSectionHeaderError)
+# pylint: enable=F0401
+
+DEFAULT_EXTENSIONS = {
+    'nt': ('ini', 'cnf'),
+    'posix': ('cnf',)
+}
+
+
+def read_option_files(**config):
+    """
+    Read option files for connection parameters.
+
+    Checks if connection arguments contain option file arguments, and then
+    reads option files accordingly.
+    """
+    if 'option_files' in config:
+        try:
+            if isinstance(config['option_groups'], str):
+                config['option_groups'] = [config['option_groups']]
+            groups = config['option_groups']
+            del config['option_groups']
+        except KeyError:
+            groups = ['client', 'connector_python']
+
+        if isinstance(config['option_files'], str):
+            config['option_files'] = [config['option_files']]
+        option_parser = MySQLOptionsParser(list(config['option_files']),
+                                           keep_dashes=False)
+        del config['option_files']
+
+        config_from_file = option_parser.get_groups_as_dict_with_priority(
+            *groups)
+        config_options = {}
+        for group in groups:
+            try:
+                for option, value in config_from_file[group].items():
+                    try:
+                        if option == 'socket':
+                            option = 'unix_socket'
+
+                        if (option not in CNX_POOL_ARGS and
+                                option != 'failover'):
+                            # pylint: disable=W0104
+                            DEFAULT_CONFIGURATION[option]
+                            # pylint: enable=W0104
+
+                        if (option not in config_options or
+                                config_options[option][1] <= value[1]):
+                            config_options[option] = value
+                    except KeyError:
+                        if group == 'connector_python':
+                            raise AttributeError("Unsupported argument "
+                                                 "'{0}'".format(option))
+            except KeyError:
+                continue
+
+        not_evaluate = ('password', 'passwd')
+        for option, value in config_options.items():
+            if option not in config:
+                try:
+                    if option in not_evaluate:
+                        config[option] = value[0]
+                    else:
+                        config[option] = eval(value[0])  # pylint: disable=W0123
+                except (NameError, SyntaxError):
+                    config[option] = value[0]
+
+    return config
+
+
+class MySQLOptionsParser(SafeConfigParser):  # pylint: disable=R0901
+    """This class implements methods to parse MySQL option files"""
+
+    def __init__(self, files=None, keep_dashes=True):  # pylint: disable=W0231
+        """Initialize
+
+        If defaults is True, default option files are read first
+
+        Raises ValueError if defaults is set to True but defaults files
+        cannot be found.
+        """
+
+        # Regular expression to allow options with no value(For Python v2.6)
+        self.OPTCRE = re.compile(           # pylint: disable=C0103
+            r'(?P<option>[^:=\s][^:=]*)'
+            r'\s*(?:'
+            r'(?P<vi>[:=])\s*'
+            r'(?P<value>.*))?$'
+        )
+
+        self._options_dict = {}
+
+        if PY2:
+            SafeConfigParser.__init__(self)
+        else:
+            SafeConfigParser.__init__(self, strict=False)
+
+        self.default_extension = DEFAULT_EXTENSIONS[os.name]
+        self.keep_dashes = keep_dashes
+
+        if not files:
+            raise ValueError('files argument should be given')
+        if isinstance(files, str):
+            self.files = [files]
+        else:
+            self.files = files
+
+        self._parse_options(list(self.files))
+        self._sections = self.get_groups_as_dict()
+
+    def optionxform(self, optionstr):
+        """Converts option strings
+
+        Converts option strings to lower case and replaces dashes(-) with
+        underscores(_) if keep_dashes variable is set.
+        """
+        if not self.keep_dashes:
+            optionstr = optionstr.replace('-', '_')
+        return optionstr.lower()
+
+    def _parse_options(self, files):
+        """Parse options from files given as arguments.
+         This method checks for !include or !inculdedir directives and if there
+         is any, those files included by these directives are also parsed
+         for options.
+
+        Raises ValueError if any of the included or file given in arguments
+        is not readable.
+        """
+        index = 0
+        err_msg = "Option file '{0}' being included again in file '{1}'"
+
+        for file_ in files:
+            try:
+                if file_ in files[index+1:]:
+                    raise ValueError("Same option file '{0}' occurring more "
+                                     "than once in the list".format(file_))
+                with open(file_, 'r') as op_file:
+                    for line in op_file.readlines():
+                        if line.startswith('!includedir'):
+                            _, dir_path = line.split(None, 1)
+                            dir_path = dir_path.strip()
+                            for entry in os.listdir(dir_path):
+                                entry = os.path.join(dir_path, entry)
+                                if entry in files:
+                                    raise ValueError(err_msg.format(
+                                        entry, file_))
+                                if (os.path.isfile(entry) and
+                                        entry.endswith(self.default_extension)):
+                                    files.insert(index+1, entry)
+
+                        elif line.startswith('!include'):
+                            _, filename = line.split(None, 1)
+                            filename = filename.strip()
+                            if filename in files:
+                                raise ValueError(err_msg.format(
+                                    filename, file_))
+                            files.insert(index+1, filename)
+
+                    index += 1
+
+            except (IOError, OSError) as exc:
+                raise ValueError("Failed reading file '{0}': {1}".format(
+                    file_, str(exc)))
+
+        read_files = self.read(files)
+        not_read_files = set(files) - set(read_files)
+        if not_read_files:
+            raise ValueError("File(s) {0} could not be read.".format(
+                ', '.join(not_read_files)))
+
+    def read(self, filenames):  # pylint: disable=W0221
+        """Read and parse a filename or a list of filenames.
+
+        Overridden from ConfigParser and modified so as to allow options
+        which are not inside any section header
+
+        Return list of successfully read files.
+        """
+        if isinstance(filenames, str):
+            filenames = [filenames]
+        read_ok = []
+        for priority, filename in enumerate(filenames):
+            try:
+                out_file = io.StringIO()
+                for line in codecs.open(filename, encoding='utf-8'):
+                    line = line.strip()
+                    match_obj = self.OPTCRE.match(line)
+                    if not self.SECTCRE.match(line) and match_obj:
+                        optname, delimiter, optval = match_obj.group('option',
+                                                                     'vi',
+                                                                     'value')
+                        if optname and not optval and not delimiter:
+                            out_file.write(line + "=\n")
+                        else:
+                            out_file.write(line + '\n')
+                    else:
+                        out_file.write(line + '\n')
+                out_file.seek(0)
+            except IOError:
+                continue
+            try:
+                self._read(out_file, filename)
+                for group in self._sections.keys():
+                    try:
+                        self._options_dict[group]
+                    except KeyError:
+                        self._options_dict[group] = {}
+                    for option, value in self._sections[group].items():
+                        self._options_dict[group][option] = (value, priority)
+
+                self._sections = self._dict()
+
+            except MissingSectionHeaderError:
+                self._read(out_file, filename)
+            out_file.close()
+            read_ok.append(filename)
+        return read_ok
+
+    def get_groups(self, *args):
+        """Returns options as a dictionary.
+
+        Returns options from all the groups specified as arguments, returns
+        the options from all groups if no argument provided. Options are
+        overridden when they are found in the next group.
+
+        Returns a dictionary
+        """
+        if not args:
+            args = self._options_dict.keys()
+
+        options = {}
+        priority = {}
+        for group in args:
+            try:
+                for option, value in [(key, value,) for key, value in
+                                      self._options_dict[group].items() if
+                                      key != "__name__" and
+                                      not key.startswith("!")]:
+                    if option not in options or priority[option] <= value[1]:
+                        priority[option] = value[1]
+                        options[option] = value[0]
+            except KeyError:
+                pass
+
+        return options
+
+    def get_groups_as_dict_with_priority(self, *args): # pylint: disable=C0103
+        """Returns options as dictionary of dictionaries.
+
+        Returns options from all the groups specified as arguments. For each
+        group the option are contained in a dictionary. The order in which
+        the groups are specified is unimportant. Also options are not
+        overridden in between the groups.
+
+        The value is a tuple with two elements, first being the actual value
+        and second is the priority of the value which is higher for a value
+        read from a higher priority file.
+
+        Returns an dictionary of dictionaries
+        """
+        if not args:
+            args = self._options_dict.keys()
+
+        options = dict()
+        for group in args:
+            try:
+                options[group] = dict((key, value,) for key, value in
+                                      self._options_dict[group].items() if
+                                      key != "__name__" and
+                                      not key.startswith("!"))
+            except KeyError:
+                pass
+
+        return options
+
+    def get_groups_as_dict(self, *args):
+        """Returns options as dictionary of dictionaries.
+
+        Returns options from all the groups specified as arguments. For each
+        group the option are contained in a dictionary. The order in which
+        the groups are specified is unimportant. Also options are not
+        overridden in between the groups.
+
+        Returns an dictionary of dictionaries
+        """
+        if not args:
+            args = self._options_dict.keys()
+
+        options = dict()
+        for group in args:
+            try:
+                options[group] = dict((key, value[0],) for key, value in
+                                      self._options_dict[group].items() if
+                                      key != "__name__" and
+                                      not key.startswith("!"))
+            except KeyError:
+                pass
+
+        return options
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/pooling.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/pooling.py
new file mode 100644
index 0000000..1874eaf
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/pooling.py
@@ -0,0 +1,367 @@
+# Copyright (c) 2013, 2020, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementing pooling of connections to MySQL servers.
+"""
+
+import re
+from uuid import uuid4
+# pylint: disable=F0401
+try:
+    import queue
+except ImportError:
+    # Python v2
+    import Queue as queue
+# pylint: enable=F0401
+import threading
+
+try:
+    from mysql.connector.connection_cext import (CMySQLConnection)
+except ImportError:
+    CMySQLConnection = None
+
+from . import errors
+from . import Connect
+from .connection import MySQLConnection
+
+CONNECTION_POOL_LOCK = threading.RLock()
+CNX_POOL_MAXSIZE = 32
+CNX_POOL_MAXNAMESIZE = 64
+CNX_POOL_NAMEREGEX = re.compile(r'[^a-zA-Z0-9._:\-*$#]')
+MYSQL_CNX_CLASS = ((MySQLConnection) if CMySQLConnection is None else
+                   (MySQLConnection, CMySQLConnection))
+
+
+def generate_pool_name(**kwargs):
+    """Generate a pool name
+
+    This function takes keyword arguments, usually the connection
+    arguments for MySQLConnection, and tries to generate a name for
+    a pool.
+
+    Raises PoolError when no name can be generated.
+
+    Returns a string.
+    """
+    parts = []
+    for key in ('host', 'port', 'user', 'database'):
+        try:
+            parts.append(str(kwargs[key]))
+        except KeyError:
+            pass
+
+    if not parts:
+        raise errors.PoolError(
+            "Failed generating pool name; specify pool_name")
+
+    return '_'.join(parts)
+
+
+class PooledMySQLConnection(object):
+    """Class holding a MySQL Connection in a pool
+
+    PooledMySQLConnection is used by MySQLConnectionPool to return an
+    instance holding a MySQL connection. It works like a MySQLConnection
+    except for methods like close() and config().
+
+    The close()-method will add the connection back to the pool rather
+    than disconnecting from the MySQL server.
+
+    Configuring the connection have to be done through the MySQLConnectionPool
+    method set_config(). Using config() on pooled connection will raise a
+    PoolError.
+    """
+    def __init__(self, pool, cnx):
+        """Initialize
+
+        The pool argument must be an instance of MySQLConnectionPoll. cnx
+        if an instance of MySQLConnection.
+        """
+        if not isinstance(pool, MySQLConnectionPool):
+            raise AttributeError(
+                "pool should be a MySQLConnectionPool")
+        if not isinstance(cnx, MYSQL_CNX_CLASS):
+            raise AttributeError(
+                "cnx should be a MySQLConnection")
+        self._cnx_pool = pool
+        self._cnx = cnx
+
+    def __getattr__(self, attr):
+        """Calls attributes of the MySQLConnection instance"""
+        return getattr(self._cnx, attr)
+
+    def close(self):
+        """Do not close, but add connection back to pool
+
+        The close() method does not close the connection with the
+        MySQL server. The connection is added back to the pool so it
+        can be reused.
+
+        When the pool is configured to reset the session, the session
+        state will be cleared by re-authenticating the user.
+        """
+        try:
+            cnx = self._cnx
+            if self._cnx_pool.reset_session:
+                cnx.reset_session()
+        finally:
+            self._cnx_pool.add_connection(cnx)
+            self._cnx = None
+
+    def config(self, **kwargs):
+        """Configuration is done through the pool"""
+        raise errors.PoolError(
+            "Configuration for pooled connections should "
+            "be done through the pool itself."
+        )
+
+    @property
+    def pool_name(self):
+        """Return the name of the connection pool"""
+        return self._cnx_pool.pool_name
+
+
+class MySQLConnectionPool(object):
+    """Class defining a pool of MySQL connections"""
+    def __init__(self, pool_size=5, pool_name=None, pool_reset_session=True,
+                 **kwargs):
+        """Initialize
+
+        Initialize a MySQL connection pool with a maximum number of
+        connections set to pool_size. The rest of the keywords
+        arguments, kwargs, are configuration arguments for MySQLConnection
+        instances.
+        """
+        self._pool_size = None
+        self._pool_name = None
+        self._reset_session = pool_reset_session
+        self._set_pool_size(pool_size)
+        self._set_pool_name(pool_name or generate_pool_name(**kwargs))
+        self._cnx_config = {}
+        self._cnx_queue = queue.Queue(self._pool_size)
+        self._config_version = uuid4()
+
+        if kwargs:
+            self.set_config(**kwargs)
+            cnt = 0
+            while cnt < self._pool_size:
+                self.add_connection()
+                cnt += 1
+
+    @property
+    def pool_name(self):
+        """Return the name of the connection pool"""
+        return self._pool_name
+
+    @property
+    def pool_size(self):
+        """Return number of connections managed by the pool"""
+        return self._pool_size
+
+    @property
+    def reset_session(self):
+        """Return whether to reset session"""
+        return self._reset_session
+
+    def set_config(self, **kwargs):
+        """Set the connection configuration for MySQLConnection instances
+
+        This method sets the configuration used for creating MySQLConnection
+        instances. See MySQLConnection for valid connection arguments.
+
+        Raises PoolError when a connection argument is not valid, missing
+        or not supported by MySQLConnection.
+        """
+        if not kwargs:
+            return
+
+        with CONNECTION_POOL_LOCK:
+            try:
+                test_cnx = Connect()
+                test_cnx.config(**kwargs)
+                self._cnx_config = kwargs
+                self._config_version = uuid4()
+            except AttributeError as err:
+                raise errors.PoolError(
+                    "Connection configuration not valid: {0}".format(err))
+
+    def _set_pool_size(self, pool_size):
+        """Set the size of the pool
+
+        This method sets the size of the pool but it will not resize the pool.
+
+        Raises an AttributeError when the pool_size is not valid. Invalid size
+        is 0, negative or higher than pooling.CNX_POOL_MAXSIZE.
+        """
+        if pool_size <= 0 or pool_size > CNX_POOL_MAXSIZE:
+            raise AttributeError(
+                "Pool size should be higher than 0 and "
+                "lower or equal to {0}".format(CNX_POOL_MAXSIZE))
+        self._pool_size = pool_size
+
+    def _set_pool_name(self, pool_name):
+        r"""Set the name of the pool
+
+        This method checks the validity and sets the name of the pool.
+
+        Raises an AttributeError when pool_name contains illegal characters
+        ([^a-zA-Z0-9._\-*$#]) or is longer than pooling.CNX_POOL_MAXNAMESIZE.
+        """
+        if CNX_POOL_NAMEREGEX.search(pool_name):
+            raise AttributeError(
+                "Pool name '{0}' contains illegal characters".format(pool_name))
+        if len(pool_name) > CNX_POOL_MAXNAMESIZE:
+            raise AttributeError(
+                "Pool name '{0}' is too long".format(pool_name))
+        self._pool_name = pool_name
+
+    def _queue_connection(self, cnx):
+        """Put connection back in the queue
+
+        This method is putting a connection back in the queue. It will not
+        acquire a lock as the methods using _queue_connection() will have it
+        set.
+
+        Raises PoolError on errors.
+        """
+        if not isinstance(cnx, MYSQL_CNX_CLASS):
+            raise errors.PoolError(
+                "Connection instance not subclass of MySQLConnection.")
+
+        try:
+            self._cnx_queue.put(cnx, block=False)
+        except queue.Full:
+            raise errors.PoolError("Failed adding connection; queue is full")
+
+    def add_connection(self, cnx=None):
+        """Add a connection to the pool
+
+        This method instantiates a MySQLConnection using the configuration
+        passed when initializing the MySQLConnectionPool instance or using
+        the set_config() method.
+        If cnx is a MySQLConnection instance, it will be added to the
+        queue.
+
+        Raises PoolError when no configuration is set, when no more
+        connection can be added (maximum reached) or when the connection
+        can not be instantiated.
+        """
+        with CONNECTION_POOL_LOCK:
+            if not self._cnx_config:
+                raise errors.PoolError(
+                    "Connection configuration not available")
+
+            if self._cnx_queue.full():
+                raise errors.PoolError(
+                    "Failed adding connection; queue is full")
+
+            if not cnx:
+                cnx = Connect(**self._cnx_config)
+                try:
+                    if (self._reset_session and self._cnx_config['compress']
+                            and cnx.get_server_version() < (5, 7, 3)):
+                        raise errors.NotSupportedError("Pool reset session is "
+                                                       "not supported with "
+                                                       "compression for MySQL "
+                                                       "server version 5.7.2 "
+                                                       "or earlier.")
+                except KeyError:
+                    pass
+
+                # pylint: disable=W0201,W0212
+                cnx._pool_config_version = self._config_version
+                # pylint: enable=W0201,W0212
+            else:
+                if not isinstance(cnx, MYSQL_CNX_CLASS):
+                    raise errors.PoolError(
+                        "Connection instance not subclass of MySQLConnection.")
+
+            self._queue_connection(cnx)
+
+    def get_connection(self):
+        """Get a connection from the pool
+
+        This method returns an PooledMySQLConnection instance which
+        has a reference to the pool that created it, and the next available
+        MySQL connection.
+
+        When the MySQL connection is not connect, a reconnect is attempted.
+
+        Raises PoolError on errors.
+
+        Returns a PooledMySQLConnection instance.
+        """
+        with CONNECTION_POOL_LOCK:
+            try:
+                cnx = self._cnx_queue.get(block=False)
+            except queue.Empty:
+                raise errors.PoolError(
+                    "Failed getting connection; pool exhausted")
+
+            # pylint: disable=W0201,W0212
+            if not cnx.is_connected() \
+                    or self._config_version != cnx._pool_config_version:
+                cnx.config(**self._cnx_config)
+                try:
+                    cnx.reconnect()
+                except errors.InterfaceError:
+                    # Failed to reconnect, give connection back to pool
+                    self._queue_connection(cnx)
+                    raise
+                cnx._pool_config_version = self._config_version
+            # pylint: enable=W0201,W0212
+
+            return PooledMySQLConnection(self, cnx)
+
+    def _remove_connections(self):
+        """Close all connections
+
+        This method closes all connections. It returns the number
+        of connections it closed.
+
+        Used mostly for tests.
+
+        Returns int.
+        """
+        with CONNECTION_POOL_LOCK:
+            cnt = 0
+            cnxq = self._cnx_queue
+            while cnxq.qsize():
+                try:
+                    cnx = cnxq.get(block=False)
+                    cnx.disconnect()
+                    cnt += 1
+                except queue.Empty:
+                    return cnt
+                except errors.PoolError:
+                    raise
+                except errors.Error:
+                    # Any other error when closing means connection is closed
+                    pass
+
+            return cnt
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/protocol.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/protocol.py
new file mode 100644
index 0000000..d9b4b24
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/protocol.py
@@ -0,0 +1,762 @@
+# Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implements the MySQL Client/Server protocol
+"""
+
+import struct
+import datetime
+from decimal import Decimal
+
+from .constants import (
+    FieldFlag, ServerCmd, FieldType, ClientFlag)
+from . import errors, utils
+from .authentication import get_auth_plugin
+from .catch23 import PY2, struct_unpack
+from .errors import DatabaseError, get_exception
+
+PROTOCOL_VERSION = 10
+
+
+class MySQLProtocol(object):
+    """Implements MySQL client/server protocol
+
+    Create and parses MySQL packets.
+    """
+
+    def _connect_with_db(self, client_flags, database):
+        """Prepare database string for handshake response"""
+        if client_flags & ClientFlag.CONNECT_WITH_DB and database:
+            return database.encode('utf8') + b'\x00'
+        return b'\x00'
+
+    def _auth_response(self, client_flags, username, password, database,
+                       auth_plugin, auth_data, ssl_enabled):
+        """Prepare the authentication response"""
+        if not password:
+            return b'\x00'
+
+        try:
+            auth = get_auth_plugin(auth_plugin)(
+                auth_data,
+                username=username, password=password, database=database,
+                ssl_enabled=ssl_enabled)
+            plugin_auth_response = auth.auth_response()
+        except (TypeError, errors.InterfaceError) as exc:
+            raise errors.InterfaceError(
+                "Failed authentication: {0}".format(str(exc)))
+
+        if client_flags & ClientFlag.SECURE_CONNECTION:
+            resplen = len(plugin_auth_response)
+            auth_response = struct.pack('<B', resplen) + plugin_auth_response
+        else:
+            auth_response = plugin_auth_response + b'\x00'
+        return auth_response
+
+    def make_auth(self, handshake, username=None, password=None, database=None,
+                  charset=45, client_flags=0,
+                  max_allowed_packet=1073741824, ssl_enabled=False,
+                  auth_plugin=None, conn_attrs=None):
+        """Make a MySQL Authentication packet"""
+
+        try:
+            auth_data = handshake['auth_data']
+            auth_plugin = auth_plugin or handshake['auth_plugin']
+        except (TypeError, KeyError) as exc:
+            raise errors.ProgrammingError(
+                "Handshake misses authentication info ({0})".format(exc))
+
+        if not username:
+            username = b''
+        try:
+            username_bytes = username.encode('utf8')  # pylint: disable=E1103
+        except AttributeError:
+            # Username is already bytes
+            username_bytes = username
+        packet = struct.pack('<IIH{filler}{usrlen}sx'.format(
+            filler='x' * 22, usrlen=len(username_bytes)),
+                             client_flags, max_allowed_packet, charset,
+                             username_bytes)
+
+        packet += self._auth_response(client_flags, username, password,
+                                      database,
+                                      auth_plugin,
+                                      auth_data, ssl_enabled)
+
+        packet += self._connect_with_db(client_flags, database)
+
+        if client_flags & ClientFlag.PLUGIN_AUTH:
+            packet += auth_plugin.encode('utf8') + b'\x00'
+
+        if (client_flags & ClientFlag.CONNECT_ARGS) and conn_attrs is not None:
+            packet += self.make_conn_attrs(conn_attrs)
+
+        return packet
+
+    def make_conn_attrs(self, conn_attrs):
+        """Encode the connection attributes"""
+        for attr_name in conn_attrs:
+            if conn_attrs[attr_name] is None:
+                conn_attrs[attr_name] = ""
+        conn_attrs_len = (
+            sum([len(x) + len(conn_attrs[x]) for x in conn_attrs]) +
+            len(conn_attrs.keys()) + len(conn_attrs.values()))
+
+        conn_attrs_packet = struct.pack('<B', conn_attrs_len)
+        for attr_name in conn_attrs:
+            conn_attrs_packet += struct.pack('<B', len(attr_name))
+            conn_attrs_packet += attr_name.encode('utf8')
+            conn_attrs_packet += struct.pack('<B', len(conn_attrs[attr_name]))
+            conn_attrs_packet += conn_attrs[attr_name].encode('utf8')
+        return conn_attrs_packet
+
+    def make_auth_ssl(self, charset=45, client_flags=0,
+                      max_allowed_packet=1073741824):
+        """Make a SSL authentication packet"""
+        return utils.int4store(client_flags) + \
+               utils.int4store(max_allowed_packet) + \
+               utils.int2store(charset) + \
+               b'\x00' * 22
+
+    def make_command(self, command, argument=None):
+        """Make a MySQL packet containing a command"""
+        data = utils.int1store(command)
+        if argument is not None:
+            data += argument
+        return data
+
+    def make_stmt_fetch(self, statement_id, rows=1):
+        """Make a MySQL packet with Fetch Statement command"""
+        return utils.int4store(statement_id) + utils.int4store(rows)
+
+    def make_change_user(self, handshake, username=None, password=None,
+                         database=None, charset=45, client_flags=0,
+                         ssl_enabled=False, auth_plugin=None):
+        """Make a MySQL packet with the Change User command"""
+
+        try:
+            auth_data = handshake['auth_data']
+            auth_plugin = auth_plugin or handshake['auth_plugin']
+        except (TypeError, KeyError) as exc:
+            raise errors.ProgrammingError(
+                "Handshake misses authentication info ({0})".format(exc))
+
+        if not username:
+            username = b''
+        try:
+            username_bytes = username.encode('utf8')  # pylint: disable=E1103
+        except AttributeError:
+            # Username is already bytes
+            username_bytes = username
+        packet = struct.pack('<B{usrlen}sx'.format(usrlen=len(username_bytes)),
+                             ServerCmd.CHANGE_USER, username_bytes)
+
+        packet += self._auth_response(client_flags, username, password,
+                                      database,
+                                      auth_plugin,
+                                      auth_data, ssl_enabled)
+
+        packet += self._connect_with_db(client_flags, database)
+
+        packet += struct.pack('<H', charset)
+
+        if client_flags & ClientFlag.PLUGIN_AUTH:
+            packet += auth_plugin.encode('utf8') + b'\x00'
+
+        return packet
+
+    def parse_handshake(self, packet):
+        """Parse a MySQL Handshake-packet"""
+        res = {}
+        res['protocol'] = struct_unpack('<xxxxB', packet[0:5])[0]
+        if res["protocol"] != PROTOCOL_VERSION:
+            raise DatabaseError("Protocol mismatch; server version = {}, "
+                                "client version = {}".format(res["protocol"],
+                                                             PROTOCOL_VERSION))
+        (packet, res['server_version_original']) = utils.read_string(
+            packet[5:], end=b'\x00')
+
+        (res['server_threadid'],
+         auth_data1,
+         capabilities1,
+         res['charset'],
+         res['server_status'],
+         capabilities2,
+         auth_data_length
+        ) = struct_unpack('<I8sx2sBH2sBxxxxxxxxxx', packet[0:31])
+        res['server_version_original'] = res['server_version_original'].decode()
+
+        packet = packet[31:]
+
+        capabilities = utils.intread(capabilities1 + capabilities2)
+        auth_data2 = b''
+        if capabilities & ClientFlag.SECURE_CONNECTION:
+            size = min(13, auth_data_length - 8) if auth_data_length else 13
+            auth_data2 = packet[0:size]
+            packet = packet[size:]
+            if auth_data2[-1] == 0:
+                auth_data2 = auth_data2[:-1]
+
+        if capabilities & ClientFlag.PLUGIN_AUTH:
+            if (b'\x00' not in packet
+                    and res['server_version_original'].startswith("5.5.8")):
+                # MySQL server 5.5.8 has a bug where end byte is not send
+                (packet, res['auth_plugin']) = (b'', packet)
+            else:
+                (packet, res['auth_plugin']) = utils.read_string(
+                    packet, end=b'\x00')
+            res['auth_plugin'] = res['auth_plugin'].decode('utf-8')
+        else:
+            res['auth_plugin'] = 'mysql_native_password'
+
+        res['auth_data'] = auth_data1 + auth_data2
+        res['capabilities'] = capabilities
+        return res
+
+    def parse_ok(self, packet):
+        """Parse a MySQL OK-packet"""
+        if not packet[4] == 0:
+            raise errors.InterfaceError("Failed parsing OK packet (invalid).")
+
+        ok_packet = {}
+        try:
+            ok_packet['field_count'] = struct_unpack('<xxxxB', packet[0:5])[0]
+            (packet, ok_packet['affected_rows']) = utils.read_lc_int(packet[5:])
+            (packet, ok_packet['insert_id']) = utils.read_lc_int(packet)
+            (ok_packet['status_flag'],
+             ok_packet['warning_count']) = struct_unpack('<HH', packet[0:4])
+            packet = packet[4:]
+            if packet:
+                (packet, ok_packet['info_msg']) = utils.read_lc_string(packet)
+                ok_packet['info_msg'] = ok_packet['info_msg'].decode('utf-8')
+        except ValueError:
+            raise errors.InterfaceError("Failed parsing OK packet.")
+        return ok_packet
+
+    def parse_column_count(self, packet):
+        """Parse a MySQL packet with the number of columns in result set"""
+        try:
+            count = utils.read_lc_int(packet[4:])[1]
+            return count
+        except (struct.error, ValueError):
+            raise errors.InterfaceError("Failed parsing column count")
+
+    def parse_column(self, packet, charset='utf-8'):
+        """Parse a MySQL column-packet"""
+        (packet, _) = utils.read_lc_string(packet[4:])  # catalog
+        (packet, _) = utils.read_lc_string(packet)  # db
+        (packet, _) = utils.read_lc_string(packet)  # table
+        (packet, _) = utils.read_lc_string(packet)  # org_table
+        (packet, name) = utils.read_lc_string(packet)  # name
+        (packet, _) = utils.read_lc_string(packet)  # org_name
+
+        try:
+            (_, _, field_type,
+             flags, _) = struct_unpack('<xHIBHBxx', packet)
+        except struct.error:
+            raise errors.InterfaceError("Failed parsing column information")
+
+        return (
+            name.decode(charset),
+            field_type,
+            None,  # display_size
+            None,  # internal_size
+            None,  # precision
+            None,  # scale
+            ~flags & FieldFlag.NOT_NULL,  # null_ok
+            flags,  # MySQL specific
+        )
+
+    def parse_eof(self, packet):
+        """Parse a MySQL EOF-packet"""
+        if packet[4] == 0:
+            # EOF packet deprecation
+            return self.parse_ok(packet)
+
+        err_msg = "Failed parsing EOF packet."
+        res = {}
+        try:
+            unpacked = struct_unpack('<xxxBBHH', packet)
+        except struct.error:
+            raise errors.InterfaceError(err_msg)
+
+        if not (unpacked[1] == 254 and len(packet) <= 9):
+            raise errors.InterfaceError(err_msg)
+
+        res['warning_count'] = unpacked[2]
+        res['status_flag'] = unpacked[3]
+        return res
+
+    def parse_statistics(self, packet, with_header=True):
+        """Parse the statistics packet"""
+        errmsg = "Failed getting COM_STATISTICS information"
+        res = {}
+        # Information is separated by 2 spaces
+        if with_header:
+            pairs = packet[4:].split(b'\x20\x20')
+        else:
+            pairs = packet.split(b'\x20\x20')
+        for pair in pairs:
+            try:
+                (lbl, val) = [v.strip() for v in pair.split(b':', 2)]
+            except:
+                raise errors.InterfaceError(errmsg)
+
+            # It's either an integer or a decimal
+            lbl = lbl.decode('utf-8')
+            try:
+                res[lbl] = int(val)
+            except:
+                try:
+                    res[lbl] = Decimal(val.decode('utf-8'))
+                except:
+                    raise errors.InterfaceError(
+                        "{0} ({1}:{2}).".format(errmsg, lbl, val))
+        return res
+
+    def read_text_result(self, sock, version, count=1):
+        """Read MySQL text result
+
+        Reads all or given number of rows from the socket.
+
+        Returns a tuple with 2 elements: a list with all rows and
+        the EOF packet.
+        """
+        rows = []
+        eof = None
+        rowdata = None
+        i = 0
+        while True:
+            if eof or i == count:
+                break
+            packet = sock.recv()
+            if packet.startswith(b'\xff\xff\xff'):
+                datas = [packet[4:]]
+                packet = sock.recv()
+                while packet.startswith(b'\xff\xff\xff'):
+                    datas.append(packet[4:])
+                    packet = sock.recv()
+                datas.append(packet[4:])
+                rowdata = utils.read_lc_string_list(bytearray(b'').join(datas))
+            elif packet[4] == 254 and packet[0] < 7:
+                eof = self.parse_eof(packet)
+                rowdata = None
+            else:
+                eof = None
+                rowdata = utils.read_lc_string_list(packet[4:])
+            if eof is None and rowdata is not None:
+                rows.append(rowdata)
+            elif eof is None and rowdata is None:
+                raise get_exception(packet)
+            i += 1
+        return rows, eof
+
+    def _parse_binary_integer(self, packet, field):
+        """Parse an integer from a binary packet"""
+        if field[1] == FieldType.TINY:
+            format_ = '<b'
+            length = 1
+        elif field[1] == FieldType.SHORT:
+            format_ = '<h'
+            length = 2
+        elif field[1] in (FieldType.INT24, FieldType.LONG):
+            format_ = '<i'
+            length = 4
+        elif field[1] == FieldType.LONGLONG:
+            format_ = '<q'
+            length = 8
+
+        if field[7] & FieldFlag.UNSIGNED:
+            format_ = format_.upper()
+
+        return (packet[length:], struct_unpack(format_, packet[0:length])[0])
+
+    def _parse_binary_float(self, packet, field):
+        """Parse a float/double from a binary packet"""
+        if field[1] == FieldType.DOUBLE:
+            length = 8
+            format_ = '<d'
+        else:
+            length = 4
+            format_ = '<f'
+
+        return (packet[length:], struct_unpack(format_, packet[0:length])[0])
+
+    def _parse_binary_timestamp(self, packet, field):
+        """Parse a timestamp from a binary packet"""
+        length = packet[0]
+        value = None
+        if length == 4:
+            value = datetime.date(
+                year=struct_unpack('<H', packet[1:3])[0],
+                month=packet[3],
+                day=packet[4])
+        elif length >= 7:
+            mcs = 0
+            if length == 11:
+                mcs = struct_unpack('<I', packet[8:length + 1])[0]
+            value = datetime.datetime(
+                year=struct_unpack('<H', packet[1:3])[0],
+                month=packet[3],
+                day=packet[4],
+                hour=packet[5],
+                minute=packet[6],
+                second=packet[7],
+                microsecond=mcs)
+
+        return (packet[length + 1:], value)
+
+    def _parse_binary_time(self, packet, field):
+        """Parse a time value from a binary packet"""
+        length = packet[0]
+        data = packet[1:length + 1]
+        mcs = 0
+        if length > 8:
+            mcs = struct_unpack('<I', data[8:])[0]
+        days = struct_unpack('<I', data[1:5])[0]
+        if data[0] == 1:
+            days *= -1
+        tmp = datetime.timedelta(days=days,
+                                 seconds=data[7],
+                                 microseconds=mcs,
+                                 minutes=data[6],
+                                 hours=data[5])
+
+        return (packet[length + 1:], tmp)
+
+    def _parse_binary_values(self, fields, packet, charset='utf-8'):
+        """Parse values from a binary result packet"""
+        null_bitmap_length = (len(fields) + 7 + 2) // 8
+        null_bitmap = [int(i) for i in packet[0:null_bitmap_length]]
+        packet = packet[null_bitmap_length:]
+
+        values = []
+        for pos, field in enumerate(fields):
+            if null_bitmap[int((pos+2)/8)] & (1 << (pos + 2) % 8):
+                values.append(None)
+                continue
+            elif field[1] in (FieldType.TINY, FieldType.SHORT,
+                              FieldType.INT24,
+                              FieldType.LONG, FieldType.LONGLONG):
+                (packet, value) = self._parse_binary_integer(packet, field)
+                values.append(value)
+            elif field[1] in (FieldType.DOUBLE, FieldType.FLOAT):
+                (packet, value) = self._parse_binary_float(packet, field)
+                values.append(value)
+            elif field[1] in (FieldType.DATETIME, FieldType.DATE,
+                              FieldType.TIMESTAMP):
+                (packet, value) = self._parse_binary_timestamp(packet, field)
+                values.append(value)
+            elif field[1] == FieldType.TIME:
+                (packet, value) = self._parse_binary_time(packet, field)
+                values.append(value)
+            else:
+                (packet, value) = utils.read_lc_string(packet)
+                values.append(value.decode(charset))
+
+        return tuple(values)
+
+    def read_binary_result(self, sock, columns, count=1, charset='utf-8'):
+        """Read MySQL binary protocol result
+
+        Reads all or given number of binary resultset rows from the socket.
+        """
+        rows = []
+        eof = None
+        values = None
+        i = 0
+        while True:
+            if eof is not None:
+                break
+            if i == count:
+                break
+            packet = sock.recv()
+            if packet[4] == 254:
+                eof = self.parse_eof(packet)
+                values = None
+            elif packet[4] == 0:
+                eof = None
+                values = self._parse_binary_values(columns, packet[5:], charset)
+            if eof is None and values is not None:
+                rows.append(values)
+            elif eof is None and values is None:
+                raise get_exception(packet)
+            i += 1
+        return (rows, eof)
+
+    def parse_binary_prepare_ok(self, packet):
+        """Parse a MySQL Binary Protocol OK packet"""
+        if not packet[4] == 0:
+            raise errors.InterfaceError("Failed parsing Binary OK packet")
+
+        ok_pkt = {}
+        try:
+            (packet, ok_pkt['statement_id']) = utils.read_int(packet[5:], 4)
+            (packet, ok_pkt['num_columns']) = utils.read_int(packet, 2)
+            (packet, ok_pkt['num_params']) = utils.read_int(packet, 2)
+            packet = packet[1:]  # Filler 1 * \x00
+            (packet, ok_pkt['warning_count']) = utils.read_int(packet, 2)
+        except ValueError:
+            raise errors.InterfaceError("Failed parsing Binary OK packet")
+
+        return ok_pkt
+
+    def _prepare_binary_integer(self, value):
+        """Prepare an integer for the MySQL binary protocol"""
+        field_type = None
+        flags = 0
+        if value < 0:
+            if value >= -128:
+                format_ = '<b'
+                field_type = FieldType.TINY
+            elif value >= -32768:
+                format_ = '<h'
+                field_type = FieldType.SHORT
+            elif value >= -2147483648:
+                format_ = '<i'
+                field_type = FieldType.LONG
+            else:
+                format_ = '<q'
+                field_type = FieldType.LONGLONG
+        else:
+            flags = 128
+            if value <= 255:
+                format_ = '<B'
+                field_type = FieldType.TINY
+            elif value <= 65535:
+                format_ = '<H'
+                field_type = FieldType.SHORT
+            elif value <= 4294967295:
+                format_ = '<I'
+                field_type = FieldType.LONG
+            else:
+                field_type = FieldType.LONGLONG
+                format_ = '<Q'
+        return (struct.pack(format_, value), field_type, flags)
+
+    def _prepare_binary_timestamp(self, value):
+        """Prepare a timestamp object for the MySQL binary protocol
+
+        This method prepares a timestamp of type datetime.datetime or
+        datetime.date for sending over the MySQL binary protocol.
+        A tuple is returned with the prepared value and field type
+        as elements.
+
+        Raises ValueError when the argument value is of invalid type.
+
+        Returns a tuple.
+        """
+        if isinstance(value, datetime.datetime):
+            field_type = FieldType.DATETIME
+        elif isinstance(value, datetime.date):
+            field_type = FieldType.DATE
+        else:
+            raise ValueError(
+                "Argument must a datetime.datetime or datetime.date")
+
+        packed = (utils.int2store(value.year) +
+                  utils.int1store(value.month) +
+                  utils.int1store(value.day))
+
+        if isinstance(value, datetime.datetime):
+            packed = (packed + utils.int1store(value.hour) +
+                      utils.int1store(value.minute) +
+                      utils.int1store(value.second))
+            if value.microsecond > 0:
+                packed += utils.int4store(value.microsecond)
+
+        packed = utils.int1store(len(packed)) + packed
+        return (packed, field_type)
+
+    def _prepare_binary_time(self, value):
+        """Prepare a time object for the MySQL binary protocol
+
+        This method prepares a time object of type datetime.timedelta or
+        datetime.time for sending over the MySQL binary protocol.
+        A tuple is returned with the prepared value and field type
+        as elements.
+
+        Raises ValueError when the argument value is of invalid type.
+
+        Returns a tuple.
+        """
+        if not isinstance(value, (datetime.timedelta, datetime.time)):
+            raise ValueError(
+                "Argument must a datetime.timedelta or datetime.time")
+
+        field_type = FieldType.TIME
+        negative = 0
+        mcs = None
+        packed = b''
+
+        if isinstance(value, datetime.timedelta):
+            if value.days < 0:
+                negative = 1
+            (hours, remainder) = divmod(value.seconds, 3600)
+            (mins, secs) = divmod(remainder, 60)
+            packed += (utils.int4store(abs(value.days)) +
+                       utils.int1store(hours) +
+                       utils.int1store(mins) +
+                       utils.int1store(secs))
+            mcs = value.microseconds
+        else:
+            packed += (utils.int4store(0) +
+                       utils.int1store(value.hour) +
+                       utils.int1store(value.minute) +
+                       utils.int1store(value.second))
+            mcs = value.microsecond
+        if mcs:
+            packed += utils.int4store(mcs)
+
+        packed = utils.int1store(negative) + packed
+        packed = utils.int1store(len(packed)) + packed
+
+        return (packed, field_type)
+
+    def _prepare_stmt_send_long_data(self, statement, param, data):
+        """Prepare long data for prepared statements
+
+        Returns a string.
+        """
+        packet = (
+            utils.int4store(statement) +
+            utils.int2store(param) +
+            data)
+        return packet
+
+    def make_stmt_execute(self, statement_id, data=(), parameters=(),
+                          flags=0, long_data_used=None, charset='utf8'):
+        """Make a MySQL packet with the Statement Execute command"""
+        iteration_count = 1
+        null_bitmap = [0] * ((len(data) + 7) // 8)
+        values = []
+        types = []
+        packed = b''
+        if charset == 'utf8mb4':
+            charset = 'utf8'
+        if long_data_used is None:
+            long_data_used = {}
+        if parameters and data:
+            if len(data) != len(parameters):
+                raise errors.InterfaceError(
+                    "Failed executing prepared statement: data values does not"
+                    " match number of parameters")
+            for pos, _ in enumerate(parameters):
+                value = data[pos]
+                flags = 0
+                if value is None:
+                    null_bitmap[(pos // 8)] |= 1 << (pos % 8)
+                    types.append(utils.int1store(FieldType.NULL) +
+                                 utils.int1store(flags))
+                    continue
+                elif pos in long_data_used:
+                    if long_data_used[pos][0]:
+                        # We suppose binary data
+                        field_type = FieldType.BLOB
+                    else:
+                        # We suppose text data
+                        field_type = FieldType.STRING
+                elif isinstance(value, int):
+                    (packed, field_type,
+                     flags) = self._prepare_binary_integer(value)
+                    values.append(packed)
+                elif isinstance(value, str):
+                    if PY2:
+                        values.append(utils.lc_int(len(value)) +
+                                      value)
+                    else:
+                        value = value.encode(charset)
+                        values.append(
+                            utils.lc_int(len(value)) + value)
+                    field_type = FieldType.VARCHAR
+                elif isinstance(value, bytes):
+                    values.append(utils.lc_int(len(value)) + value)
+                    field_type = FieldType.BLOB
+                elif PY2 and \
+                        isinstance(value, unicode):  # pylint: disable=E0602
+                    value = value.encode(charset)
+                    values.append(utils.lc_int(len(value)) + value)
+                    field_type = FieldType.VARCHAR
+                elif isinstance(value, Decimal):
+                    values.append(
+                        utils.lc_int(len(str(value).encode(
+                            charset))) + str(value).encode(charset))
+                    field_type = FieldType.DECIMAL
+                elif isinstance(value, float):
+                    values.append(struct.pack('<d', value))
+                    field_type = FieldType.DOUBLE
+                elif isinstance(value, (datetime.datetime, datetime.date)):
+                    (packed, field_type) = self._prepare_binary_timestamp(
+                        value)
+                    values.append(packed)
+                elif isinstance(value, (datetime.timedelta, datetime.time)):
+                    (packed, field_type) = self._prepare_binary_time(value)
+                    values.append(packed)
+                else:
+                    raise errors.ProgrammingError(
+                        "MySQL binary protocol can not handle "
+                        "'{classname}' objects".format(
+                            classname=value.__class__.__name__))
+                types.append(utils.int1store(field_type) +
+                             utils.int1store(flags))
+
+        packet = (
+            utils.int4store(statement_id) +
+            utils.int1store(flags) +
+            utils.int4store(iteration_count) +
+            b''.join([struct.pack('B', bit) for bit in null_bitmap]) +
+            utils.int1store(1)
+        )
+
+        for a_type in types:
+            packet += a_type
+
+        for a_value in values:
+            packet += a_value
+
+        return packet
+
+    def parse_auth_switch_request(self, packet):
+        """Parse a MySQL AuthSwitchRequest-packet"""
+        if not packet[4] == 254:
+            raise errors.InterfaceError(
+                "Failed parsing AuthSwitchRequest packet")
+
+        (packet, plugin_name) = utils.read_string(packet[5:], end=b'\x00')
+        if packet and packet[-1] == 0:
+            packet = packet[:-1]
+
+        return plugin_name.decode('utf8'), packet
+
+    def parse_auth_more_data(self, packet):
+        """Parse a MySQL AuthMoreData-packet"""
+        if not packet[4] == 1:
+            raise errors.InterfaceError(
+                "Failed parsing AuthMoreData packet")
+
+        return packet[5:]
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/utils.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/utils.py
new file mode 100644
index 0000000..dade335
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/utils.py
@@ -0,0 +1,576 @@
+# Copyright (c) 2009, 2019, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Utilities
+"""
+
+import os
+import subprocess
+from stringprep import (in_table_a1, in_table_b1, in_table_c11, in_table_c12,
+                        in_table_c21_c22, in_table_c3, in_table_c4, in_table_c5,
+                        in_table_c6, in_table_c7, in_table_c8, in_table_c9,
+                        in_table_c12, in_table_d1, in_table_d2)
+import struct
+import sys
+import unicodedata
+
+from .catch23 import struct_unpack, PY2
+
+
+__MYSQL_DEBUG__ = False
+
+
+def intread(buf):
+    """Unpacks the given buffer to an integer"""
+    try:
+        if isinstance(buf, int):
+            return buf
+        length = len(buf)
+        if length == 1:
+            return buf[0]
+        elif length <= 4:
+            tmp = buf + b'\x00'*(4-length)
+            return struct_unpack('<I', tmp)[0]
+        tmp = buf + b'\x00'*(8-length)
+        return struct_unpack('<Q', tmp)[0]
+    except:
+        raise
+
+
+def int1store(i):
+    """
+    Takes an unsigned byte (1 byte) and packs it as a bytes-object.
+
+    Returns string.
+    """
+    if i < 0 or i > 255:
+        raise ValueError('int1store requires 0 <= i <= 255')
+    else:
+        return bytearray(struct.pack('<B', i))
+
+
+def int2store(i):
+    """
+    Takes an unsigned short (2 bytes) and packs it as a bytes-object.
+
+    Returns string.
+    """
+    if i < 0 or i > 65535:
+        raise ValueError('int2store requires 0 <= i <= 65535')
+    else:
+        return bytearray(struct.pack('<H', i))
+
+
+def int3store(i):
+    """
+    Takes an unsigned integer (3 bytes) and packs it as a bytes-object.
+
+    Returns string.
+    """
+    if i < 0 or i > 16777215:
+        raise ValueError('int3store requires 0 <= i <= 16777215')
+    else:
+        return bytearray(struct.pack('<I', i)[0:3])
+
+
+def int4store(i):
+    """
+    Takes an unsigned integer (4 bytes) and packs it as a bytes-object.
+
+    Returns string.
+    """
+    if i < 0 or i > 4294967295:
+        raise ValueError('int4store requires 0 <= i <= 4294967295')
+    else:
+        return bytearray(struct.pack('<I', i))
+
+
+def int8store(i):
+    """
+    Takes an unsigned integer (8 bytes) and packs it as string.
+
+    Returns string.
+    """
+    if i < 0 or i > 18446744073709551616:
+        raise ValueError('int8store requires 0 <= i <= 2^64')
+    else:
+        return bytearray(struct.pack('<Q', i))
+
+
+def intstore(i):
+    """
+    Takes an unsigned integers and packs it as a bytes-object.
+
+    This function uses int1store, int2store, int3store,
+    int4store or int8store depending on the integer value.
+
+    returns string.
+    """
+    if i < 0 or i > 18446744073709551616:
+        raise ValueError('intstore requires 0 <= i <=  2^64')
+
+    if i <= 255:
+        formed_string = int1store
+    elif i <= 65535:
+        formed_string = int2store
+    elif i <= 16777215:
+        formed_string = int3store
+    elif i <= 4294967295:
+        formed_string = int4store
+    else:
+        formed_string = int8store
+
+    return formed_string(i)
+
+
+def lc_int(i):
+    """
+    Takes an unsigned integer and packs it as bytes,
+    with the information of how much bytes the encoded int takes.
+    """
+    if i < 0 or i > 18446744073709551616:
+        raise ValueError('Requires 0 <= i <= 2^64')
+
+    if i < 251:
+        return bytearray(struct.pack('<B', i))
+    elif i <= 65535:
+        return b'\xfc' + bytearray(struct.pack('<H', i))
+    elif i <= 16777215:
+        return b'\xfd' + bytearray(struct.pack('<I', i)[0:3])
+
+    return b'\xfe' + bytearray(struct.pack('<Q', i))
+
+
+def read_bytes(buf, size):
+    """
+    Reads bytes from a buffer.
+
+    Returns a tuple with buffer less the read bytes, and the bytes.
+    """
+    res = buf[0:size]
+    return (buf[size:], res)
+
+
+def read_lc_string(buf):
+    """
+    Takes a buffer and reads a length coded string from the start.
+
+    This is how Length coded strings work
+
+    If the string is 250 bytes long or smaller, then it looks like this:
+
+      <-- 1b  -->
+      +----------+-------------------------
+      |  length  | a string goes here
+      +----------+-------------------------
+
+    If the string is bigger than 250, then it looks like this:
+
+      <- 1b -><- 2/3/8 ->
+      +------+-----------+-------------------------
+      | type |  length   | a string goes here
+      +------+-----------+-------------------------
+
+      if type == \xfc:
+          length is code in next 2 bytes
+      elif type == \xfd:
+          length is code in next 3 bytes
+      elif type == \xfe:
+          length is code in next 8 bytes
+
+    NULL has a special value. If the buffer starts with \xfb then
+    it's a NULL and we return None as value.
+
+    Returns a tuple (trucated buffer, bytes).
+    """
+    if buf[0] == 251:  # \xfb
+        # NULL value
+        return (buf[1:], None)
+
+    length = lsize = 0
+    fst = buf[0]
+
+    if fst <= 250:  # \xFA
+        length = fst
+        return (buf[1 + length:], buf[1:length + 1])
+    elif fst == 252:
+        lsize = 2
+    elif fst == 253:
+        lsize = 3
+    if fst == 254:
+        lsize = 8
+
+    length = intread(buf[1:lsize + 1])
+    return (buf[lsize + length + 1:], buf[lsize + 1:length + lsize + 1])
+
+
+def read_lc_string_list(buf):
+    """Reads all length encoded strings from the given buffer
+
+    Returns a list of bytes
+    """
+    byteslst = []
+
+    sizes = {252: 2, 253: 3, 254: 8}
+
+    buf_len = len(buf)
+    pos = 0
+
+    while pos < buf_len:
+        first = buf[pos]
+        if first == 255:
+            # Special case when MySQL error 1317 is returned by MySQL.
+            # We simply return None.
+            return None
+        if first == 251:
+            # NULL value
+            byteslst.append(None)
+            pos += 1
+        else:
+            if first <= 250:
+                length = first
+                byteslst.append(buf[(pos + 1):length + (pos + 1)])
+                pos += 1 + length
+            else:
+                lsize = 0
+                try:
+                    lsize = sizes[first]
+                except KeyError:
+                    return None
+                length = intread(buf[(pos + 1):lsize + (pos + 1)])
+                byteslst.append(
+                    buf[pos + 1 + lsize:length + lsize + (pos + 1)])
+                pos += 1 + lsize + length
+
+    return tuple(byteslst)
+
+
+def read_string(buf, end=None, size=None):
+    """
+    Reads a string up until a character or for a given size.
+
+    Returns a tuple (trucated buffer, string).
+    """
+    if end is None and size is None:
+        raise ValueError('read_string() needs either end or size')
+
+    if end is not None:
+        try:
+            idx = buf.index(end)
+        except ValueError:
+            raise ValueError("end byte not present in buffer")
+        return (buf[idx + 1:], buf[0:idx])
+    elif size is not None:
+        return read_bytes(buf, size)
+
+    raise ValueError('read_string() needs either end or size (weird)')
+
+
+def read_int(buf, size):
+    """Read an integer from buffer
+
+    Returns a tuple (truncated buffer, int)
+    """
+
+    try:
+        res = intread(buf[0:size])
+    except:
+        raise
+
+    return (buf[size:], res)
+
+
+def read_lc_int(buf):
+    """
+    Takes a buffer and reads an length code string from the start.
+
+    Returns a tuple with buffer less the integer and the integer read.
+    """
+    if not buf:
+        raise ValueError("Empty buffer.")
+
+    lcbyte = buf[0]
+    if lcbyte == 251:
+        return (buf[1:], None)
+    elif lcbyte < 251:
+        return (buf[1:], int(lcbyte))
+    elif lcbyte == 252:
+        return (buf[3:], struct_unpack('<xH', buf[0:3])[0])
+    elif lcbyte == 253:
+        return (buf[4:], struct_unpack('<I', buf[1:4] + b'\x00')[0])
+    elif lcbyte == 254:
+        return (buf[9:], struct_unpack('<xQ', buf[0:9])[0])
+    else:
+        raise ValueError("Failed reading length encoded integer")
+
+
+#
+# For debugging
+#
+def _digest_buffer(buf):
+    """Debug function for showing buffers"""
+    if not isinstance(buf, str):
+        return ''.join(["\\x%02x" % c for c in buf])
+    return ''.join(["\\x%02x" % ord(c) for c in buf])
+
+
+def print_buffer(abuffer, prefix=None, limit=30):
+    """Debug function printing output of _digest_buffer()"""
+    if prefix:
+        if limit and limit > 0:
+            digest = _digest_buffer(abuffer[0:limit])
+        else:
+            digest = _digest_buffer(abuffer)
+        print(prefix + ': ' + digest)
+    else:
+        print(_digest_buffer(abuffer))
+
+
+def _parse_os_release():
+    """Parse the contents of /etc/os-release file.
+
+    Returns:
+        A dictionary containing release information.
+    """
+    distro = {}
+    os_release_file = os.path.join("/etc", "os-release")
+    if not os.path.exists(os_release_file):
+        return distro
+    with open(os_release_file) as file_obj:
+        for line in file_obj:
+            key_value = line.split("=")
+            if len(key_value) != 2:
+                continue
+            key = key_value[0].lower()
+            value = key_value[1].rstrip("\n").strip('"')
+            distro[key] = value
+    return distro
+
+
+def _parse_lsb_release():
+    """Parse the contents of /etc/lsb-release file.
+
+    Returns:
+        A dictionary containing release information.
+    """
+    distro = {}
+    lsb_release_file = os.path.join("/etc", "lsb-release")
+    if os.path.exists(lsb_release_file):
+        with open(lsb_release_file) as file_obj:
+            for line in file_obj:
+                key_value = line.split("=")
+                if len(key_value) != 2:
+                    continue
+                key = key_value[0].lower()
+                value = key_value[1].rstrip("\n").strip('"')
+                distro[key] = value
+    return distro
+
+
+def _parse_lsb_release_command():
+    """Parse the output of the lsb_release command.
+
+    Returns:
+        A dictionary containing release information.
+    """
+    distro = {}
+    with open(os.devnull, "w") as devnull:
+        try:
+            stdout = subprocess.check_output(
+                ("lsb_release", "-a"), stderr=devnull)
+        except OSError:
+            return None
+        lines = stdout.decode(sys.getfilesystemencoding()).splitlines()
+        for line in lines:
+            key_value = line.split(":")
+            if len(key_value) != 2:
+                continue
+            key = key_value[0].replace(" ", "_").lower()
+            value = key_value[1].strip("\t")
+            distro[key] = value.encode("utf-8") if PY2 else value
+    return distro
+
+
+def linux_distribution():
+    """Tries to determine the name of the Linux OS distribution name.
+
+    First tries to get information from ``/etc/os-release`` file.
+    If fails, tries to get the information of ``/etc/lsb-release`` file.
+    And finally the information of ``lsb-release`` command.
+
+    Returns:
+        A tuple with (`name`, `version`, `codename`)
+    """
+    distro = _parse_lsb_release()
+    if distro:
+        return (distro.get("distrib_id", ""),
+                distro.get("distrib_release", ""),
+                distro.get("distrib_codename", ""))
+
+    if not PY2:
+        distro = _parse_lsb_release_command()
+        if distro:
+            return (distro.get("distributor_id", ""),
+                    distro.get("release", ""),
+                    distro.get("codename", ""))
+
+    distro = _parse_os_release()
+    if distro:
+        return (distro.get("name", ""),
+                distro.get("version_id", ""),
+                distro.get("version_codename", ""))
+
+    return ("", "", "")
+
+
+def _get_unicode_read_direction(unicode_str):
+    """Get the readiness direction of the unicode string.
+
+    We assume that the direction is "L-to-R" if the first character does not
+    indicate the direction is "R-to-L" or an "AL" (Arabic Letter).
+    """
+    if unicode_str and unicodedata.bidirectional(unicode_str[0]) in ("R", "AL"):
+        return "R-to-L"
+    return "L-to-R"
+
+
+def _get_unicode_direction_rule(unicode_str):
+    """
+        1) The characters in section 5.8 MUST be prohibited.
+
+        2) If a string contains any RandALCat character, the string MUST NOT
+           contain any LCat character.
+
+        3) If a string contains any RandALCat character, a RandALCat
+           character MUST be the first character of the string, and a
+           RandALCat character MUST be the last character of the string.
+    """
+    read_dir = _get_unicode_read_direction(unicode_str)
+
+    # point 3)
+    if read_dir == "R-to-L":
+        if not (in_table_d1(unicode_str[0]) and in_table_d1(unicode_str[-1])):
+            raise ValueError("Invalid unicode Bidirectional sequence, if the "
+                             "first character is RandALCat, the final character"
+                             "must be RandALCat too.")
+        # characters from in_table_d2 are prohibited.
+        return {"Bidirectional Characters requirement 2 [StringPrep, d2]":
+                in_table_d2}
+
+    # characters from in_table_d1 are prohibited.
+    return {"Bidirectional Characters requirement 2 [StringPrep, d2]":
+            in_table_d1}
+
+
+def validate_normalized_unicode_string(normalized_str):
+    """Check for Prohibited Output according to rfc4013 profile.
+
+    This profile specifies the following characters as prohibited input:
+
+       - Non-ASCII space characters [StringPrep, C.1.2]
+       - ASCII control characters [StringPrep, C.2.1]
+       - Non-ASCII control characters [StringPrep, C.2.2]
+       - Private Use characters [StringPrep, C.3]
+       - Non-character code points [StringPrep, C.4]
+       - Surrogate code points [StringPrep, C.5]
+       - Inappropriate for plain text characters [StringPrep, C.6]
+       - Inappropriate for canonical representation characters [StringPrep, C.7]
+       - Change display properties or deprecated characters [StringPrep, C.8]
+       - Tagging characters [StringPrep, C.9]
+
+    In addition of checking of Bidirectional Characters [StringPrep, Section 6]
+    and the Unassigned Code Points [StringPrep, A.1].
+
+    Returns:
+        A tuple with ("probited character", "breaked_rule")
+    """
+    rules = {
+        "Space characters that contains the ASCII code points": in_table_c11,
+        "Space characters non-ASCII code points": in_table_c12,
+        "Unassigned Code Points [StringPrep, A.1]": in_table_a1,
+        "Non-ASCII space characters [StringPrep, C.1.2]": in_table_c12,
+        "ASCII control characters [StringPrep, C.2.1]": in_table_c21_c22,
+        "Private Use characters [StringPrep, C.3]": in_table_c3,
+        "Non-character code points [StringPrep, C.4]": in_table_c4,
+        "Surrogate code points [StringPrep, C.5]": in_table_c5,
+        "Inappropriate for plain text characters [StringPrep, C.6]": in_table_c6,
+        "Inappropriate for canonical representation characters [StringPrep, C.7]": in_table_c7,
+        "Change display properties or deprecated characters [StringPrep, C.8]": in_table_c8,
+        "Tagging characters [StringPrep, C.9]": in_table_c9
+    }
+
+    try:
+        rules.update(_get_unicode_direction_rule(normalized_str))
+    except ValueError as err:
+        return normalized_str, str(err)
+
+    for char in normalized_str:
+        for rule in rules:
+            if rules[rule](char) and char != u' ':
+                return char, rule
+
+    return None
+
+
+def normalize_unicode_string(a_string):
+    """normalizes a unicode string according to rfc4013
+
+    Normalization of a unicode string according to rfc4013: The SASLprep profile
+    of the "stringprep" algorithm.
+
+    Normalization Unicode equivalence is the specification by the Unicode
+    character encoding standard that some sequences of code points represent
+    essentially the same character.
+
+    This method normalizes using the Normalization Form Compatibility
+    Composition (NFKC), as described in rfc4013 2.2.
+
+    Returns:
+        Normalized unicode string according to rfc4013.
+    """
+
+    if PY2 and not isinstance(a_string, unicode):
+        a_string = unicode(a_string)
+    # Per rfc4013 2.1. Mapping
+    # non-ASCII space characters [StringPrep, C.1.2] are mapped to ' ' (U+0020)
+    # "commonly mapped to nothing" characters [StringPrep, B.1] are mapped to ''
+    nstr_list = [
+        u' ' if in_table_c12(char) else u'' if in_table_b1(char) else char
+        for char in a_string]
+
+    nstr = u''.join(nstr_list)
+
+    # Per rfc4013 2.2. Use NFKC Normalization Form Compatibility Composition
+    # Characters are decomposed by compatibility, then recomposed by canonical
+    # equivalence.
+    nstr = unicodedata.normalize('NFKC', nstr)
+    if not nstr:
+        # Normilization results in empty string.
+        return u''
+
+    return nstr
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/connector/version.py b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/version.py
new file mode 100644
index 0000000..dde3bd9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql/connector/version.py
@@ -0,0 +1,44 @@
+# Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""MySQL Connector/Python version information
+
+The file version.py gets installed and is available after installation
+as mysql.connector.version.
+"""
+
+VERSION = (8, 0, 22, '', 1)
+
+if VERSION[3] and VERSION[4]:
+    VERSION_TEXT = '{0}.{1}.{2}{3}{4}'.format(*VERSION)
+else:
+    VERSION_TEXT = '{0}.{1}.{2}'.format(*VERSION[0:3])
+
+VERSION_EXTRA = ''
+LICENSE = 'GPLv2 with FOSS License Exception'
+EDITION = ''  # Added in package names, after the version
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/vendor/authentication_ldap_sasl_client.so b/python3-vckonline/lib/python3.8/site-packages/mysql/vendor/authentication_ldap_sasl_client.so
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index 0000000..57fe2d3
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diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/vendor/libcrypto.so.1.1 b/python3-vckonline/lib/python3.8/site-packages/mysql/vendor/libcrypto.so.1.1
new file mode 100755
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diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql/vendor/libssl.so.1.1 b/python3-vckonline/lib/python3.8/site-packages/mysql/vendor/libssl.so.1.1
new file mode 100755
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diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/LICENSE.txt b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/LICENSE.txt
new file mode 100644
index 0000000..179e730
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/LICENSE.txt
@@ -0,0 +1,1208 @@
+Licensing Information User Manual
+
+MySQL Connector/Python 8.0
+     __________________________________________________________________
+
+Introduction
+
+   This License Information User Manual contains Oracle's product license
+   and other licensing information, including licensing information for
+   third-party software which may be included in this distribution of
+   MySQL Connector/Python 8.0.
+
+   Last updated: July 2020
+
+Licensing Information
+
+   This is a release of MySQL Connector/Python 8.0, brought to you by the
+   MySQL team at Oracle. This software is released under version 2 of the
+   GNU General Public License (GPLv2), as set forth below, with the
+   following additional permissions:
+
+   This distribution of MySQL Connector/Python 8.0 is distributed with
+   certain software (including but not limited to OpenSSL) that is
+   licensed under separate terms, as designated in a particular file or
+   component or in the license documentation. Without limiting your rights
+   under the GPLv2, the authors of MySQL hereby grant you an additional
+   permission to link the program and your derivative works with the
+   separately licensed software that they have included with the program.
+
+   Without limiting the foregoing grant of rights under the GPLv2 and
+   additional permission as to separately licensed software, this
+   Connector is also subject to the Universal FOSS Exception, version 1.0,
+   a copy of which is reproduced below and can also be found along with
+   its FAQ at http://oss.oracle.com/licenses/universal-foss-exception.
+
+   Copyright (c) 2012, 2020, Oracle and/or its affiliates.
+
+Election of GPLv2
+
+   For the avoidance of doubt, except that if any license choice other
+   than GPL or LGPL is available it will apply instead, Oracle elects to
+   use only the General Public License version 2 (GPLv2) at this time for
+   any software where a choice of GPL license versions is made available
+   with the language indicating that GPLv2 or any later version may be
+   used, or where a choice of which version of the GPL is applied is
+   otherwise unspecified.
+
+GNU General Public License Version 2.0, June 1991
+
+The following applies to all products licensed under the GNU General
+Public License, Version 2.0: You may not use the identified files
+except in compliance with the GNU General Public License, Version
+2.0 (the "License.") You may obtain a copy of the License at
+http://www.gnu.org/licenses/gpl-2.0.txt. A copy of the license is
+also reproduced below. Unless required by applicable law or agreed
+to in writing, software distributed under the License is distributed
+on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+either express or implied. See the License for the specific language
+governing permissions and limitations under the License.
+
+=====================================================================
+=====================================================================
+
+GNU GENERAL PUBLIC LICENSE
+Version 2, June 1991
+
+Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+Everyone is permitted to copy and distribute verbatim
+copies of this license document, but changing it is not
+allowed.
+
+                     Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software,
+and (2) offer you this license which gives you legal permission to
+copy, distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on,
+we want its recipients to know that what they have is not the original,
+so that any problems introduced by others will not reflect on the
+original authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software
+    interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as
+a special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new
+versions of the General Public License from time to time.  Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and
+"any later version", you have the option of following the terms and
+conditions either of that version or of any later version published by
+the Free Software Foundation.  If the Program does not specify a
+version number of this License, you may choose any version ever
+published by the Free Software Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the
+author to ask for permission.  For software which is copyrighted by the
+Free Software Foundation, write to the Free Software Foundation; we
+sometimes make exceptions for this.  Our decision will be guided by the
+two goals of preserving the free status of all derivatives of our free
+software and of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND,
+EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS
+WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of
+
+    the License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+    02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
+    type 'show w'. This is free software, and you are welcome
+    to redistribute it under certain conditions; type 'show c'
+    for details.
+
+The hypothetical commands 'show w' and 'show c' should show the
+appropriate parts of the General Public License.  Of course, the
+commands you use may be called something other than 'show w' and
+'show c'; they could even be mouse-clicks or menu items--whatever
+suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  program 'Gnomovision' (which makes passes at compilers) written
+  by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library,
+you may consider it more useful to permit linking proprietary
+applications with the library.  If this is what you want to do, use
+the GNU Lesser General Public License instead of this License.
+
+   =====================================================================
+   =====================================================================
+
+The Universal FOSS Exception, Version 1.0
+
+   In addition to the rights set forth in the other license(s) included in
+   the distribution for this software, data, and/or documentation
+   (collectively the "Software", and such licenses collectively with this
+   additional permission the "Software License"), the copyright holders
+   wish to facilitate interoperability with other software, data, and/or
+   documentation distributed with complete corresponding source under a
+   license that is OSI-approved and/or categorized by the FSF as free
+   (collectively "Other FOSS"). We therefore hereby grant the following
+   additional permission with respect to the use and distribution of the
+   Software with Other FOSS, and the constants, function signatures, data
+   structures and other invocation methods used to run or interact with
+   each of them (as to each, such software's "Interfaces"):
+    i. The Software's Interfaces may, to the extent permitted by the
+       license of the Other FOSS, be copied into, used and distributed in
+       the Other FOSS in order to enable interoperability, without
+       requiring a change to the license of the Other FOSS other than as
+       to any Interfaces of the Software embedded therein. The Software's
+       Interfaces remain at all times under the Software License,
+       including without limitation as used in the Other FOSS (which upon
+       any such use also then contains a portion of the Software under the
+       Software License).
+   ii. The Other FOSS's Interfaces may, to the extent permitted by the
+       license of the Other FOSS, be copied into, used and distributed in
+       the Software in order to enable interoperability, without requiring
+       that such Interfaces be licensed under the terms of the Software
+       License or otherwise altering their original terms, if this does
+       not require any portion of the Software other than such Interfaces
+       to be licensed under the terms other than the Software License.
+   iii. If only Interfaces and no other code is copied between the
+       Software and the Other FOSS in either direction, the use and/or
+       distribution of the Software with the Other FOSS shall not be
+       deemed to require that the Other FOSS be licensed under the license
+       of the Software, other than as to any Interfaces of the Software
+       copied into the Other FOSS. This includes, by way of example and
+       without limitation, statically or dynamically linking the Software
+       together with Other FOSS after enabling interoperability using the
+       Interfaces of one or both, and distributing the resulting
+       combination under different licenses for the respective portions
+       thereof. For avoidance of doubt, a license which is OSI-approved or
+       categorized by the FSF as free, includes, for the purpose of this
+       permission, such licenses with additional permissions, and any
+       license that has previously been so approved or categorized as
+       free, even if now deprecated or otherwise no longer recognized as
+       approved or free. Nothing in this additional permission grants any
+       right to distribute any portion of the Software on terms other than
+       those of the Software License or grants any additional permission
+       of any kind for use or distribution of the Software in conjunction
+       with software other than Other FOSS.
+
+   ======================================================================
+   ======================================================================
+
+Licenses for Third-Party Components
+
+   The following sections contain licensing information for libraries that
+   may be included with this product. We are thankful to all individuals
+   that have created these.
+
+Django 2.12 and 3.0
+
+Copyright (c) Django Software Foundation and individual contributors.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification,
+are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    3. Neither the name of Django nor the names of its contributors may be
+       used to endorse or promote products derived from this software without
+       specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+***************
+Django is licensed under the three-clause BSD license; see the file
+LICENSE for details.
+
+Django includes code from the Python standard library, which is licensed
+under the Python license, a permissive open source license. The copyright and
+license is included below for compliance with Python's terms.
+
+----------------------------------------------------------------------
+
+Copyright (c) 2001-present Python Software Foundation; All Rights Reserved
+
+A. HISTORY OF THE SOFTWARE
+==========================
+
+Python was created in the early 1990s by Guido van Rossum at Stichting
+Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands
+as a successor of a language called ABC.  Guido remains Python's
+principal author, although it includes many contributions from others.
+
+In 1995, Guido continued his work on Python at the Corporation for
+National Research Initiatives (CNRI, see http://www.cnri.reston.va.us)
+in Reston, Virginia where he released several versions of the
+software.
+
+In May 2000, Guido and the Python core development team moved to
+BeOpen.com to form the BeOpen PythonLabs team.  In October of the same
+year, the PythonLabs team moved to Digital Creations (now Zope
+Corporation, see http://www.zope.com).  In 2001, the Python Software
+Foundation (PSF, see http://www.python.org/psf/) was formed, a
+non-profit organization created specifically to own Python-related
+Intellectual Property.  Zope Corporation is a sponsoring member of
+the PSF.
+
+All Python releases are Open Source (see http://www.opensource.org for
+the Open Source Definition).  Historically, most, but not all, Python
+releases have also been GPL-compatible; the table below summarizes
+the various releases.
+
+    Release         Derived     Year        Owner       GPL-
+                    from                                compatible? (1)
+
+    0.9.0 thru 1.2              1991-1995   CWI         yes
+    1.3 thru 1.5.2  1.2         1995-1999   CNRI        yes
+    1.6             1.5.2       2000        CNRI        no
+    2.0             1.6         2000        BeOpen.com  no
+    1.6.1           1.6         2001        CNRI        yes (2)
+    2.1             2.0+1.6.1   2001        PSF         no
+    2.0.1           2.0+1.6.1   2001        PSF         yes
+    2.1.1           2.1+2.0.1   2001        PSF         yes
+    2.1.2           2.1.1       2002        PSF         yes
+    2.1.3           2.1.2       2002        PSF         yes
+    2.2 and above   2.1.1       2001-now    PSF         yes
+
+Footnotes:
+
+(1) GPL-compatible doesn't mean that we're distributing Python under
+    the GPL.  All Python licenses, unlike the GPL, let you distribute
+    a modified version without making your changes open source.  The
+    GPL-compatible licenses make it possible to combine Python with
+    other software that is released under the GPL; the others don't.
+
+(2) According to Richard Stallman, 1.6.1 is not GPL-compatible,
+    because its license has a choice of law clause.  According to
+    CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1
+    is "not incompatible" with the GPL.
+
+Thanks to the many outside volunteers who have worked under Guido's
+direction to make these releases possible.
+
+B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON
+===============================================================
+
+PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
+--------------------------------------------
+
+1. This LICENSE AGREEMENT is between the Python Software Foundation
+("PSF"), and the Individual or Organization ("Licensee") accessing and
+otherwise using this software ("Python") in source or binary form and
+its associated documentation.
+
+2. Subject to the terms and conditions of this License Agreement, PSF hereby
+grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
+analyze, test, perform and/or display publicly, prepare derivative works,
+distribute, and otherwise use Python alone or in any derivative version,
+provided, however, that PSF's License Agreement and PSF's notice of copyright,
+i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
+2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Python Software Foundation;
+All Rights Reserved" are retained in Python alone or in any derivative version
+prepared by Licensee.
+
+3. In the event Licensee prepares a derivative work that is based on
+or incorporates Python or any part thereof, and wants to make
+the derivative work available to others as provided herein, then
+Licensee hereby agrees to include in any such work a brief summary of
+the changes made to Python.
+
+4. PSF is making Python available to Licensee on an "AS IS"
+basis.  PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
+IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
+DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
+FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT
+INFRINGE ANY THIRD PARTY RIGHTS.
+
+5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
+FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
+A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,
+OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
+
+6. This License Agreement will automatically terminate upon a material
+breach of its terms and conditions.
+
+7. Nothing in this License Agreement shall be deemed to create any
+relationship of agency, partnership, or joint venture between PSF and
+Licensee.  This License Agreement does not grant permission to use PSF
+trademarks or trade name in a trademark sense to endorse or promote
+products or services of Licensee, or any third party.
+
+8. By copying, installing or otherwise using Python, Licensee
+agrees to be bound by the terms and conditions of this License
+Agreement.
+
+BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0
+-------------------------------------------
+
+BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1
+
+1. This LICENSE AGREEMENT is between BeOpen.com ("BeOpen"), having an
+office at 160 Saratoga Avenue, Santa Clara, CA 95051, and the
+Individual or Organization ("Licensee") accessing and otherwise using
+this software in source or binary form and its associated
+documentation ("the Software").
+
+2. Subject to the terms and conditions of this BeOpen Python License
+Agreement, BeOpen hereby grants Licensee a non-exclusive,
+royalty-free, world-wide license to reproduce, analyze, test, perform
+and/or display publicly, prepare derivative works, distribute, and
+otherwise use the Software alone or in any derivative version,
+provided, however, that the BeOpen Python License is retained in the
+Software, alone or in any derivative version prepared by Licensee.
+
+3. BeOpen is making the Software available to Licensee on an "AS IS"
+basis.  BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
+IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND
+DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
+FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE WILL NOT
+INFRINGE ANY THIRD PARTY RIGHTS.
+
+4. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE
+SOFTWARE FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS
+AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY
+DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
+
+5. This License Agreement will automatically terminate upon a material
+breach of its terms and conditions.
+
+6. This License Agreement shall be governed by and interpreted in all
+respects by the law of the State of California, excluding conflict of
+law provisions.  Nothing in this License Agreement shall be deemed to
+create any relationship of agency, partnership, or joint venture
+between BeOpen and Licensee.  This License Agreement does not grant
+permission to use BeOpen trademarks or trade names in a trademark
+sense to endorse or promote products or services of Licensee, or any
+third party.  As an exception, the "BeOpen Python" logos available at
+http://www.pythonlabs.com/logos.html may be used according to the
+permissions granted on that web page.
+
+7. By copying, installing or otherwise using the software, Licensee
+agrees to be bound by the terms and conditions of this License
+Agreement.
+
+CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1
+---------------------------------------
+
+1. This LICENSE AGREEMENT is between the Corporation for National
+Research Initiatives, having an office at 1895 Preston White Drive,
+Reston, VA 20191 ("CNRI"), and the Individual or Organization
+("Licensee") accessing and otherwise using Python 1.6.1 software in
+source or binary form and its associated documentation.
+
+2. Subject to the terms and conditions of this License Agreement, CNRI
+hereby grants Licensee a nonexclusive, royalty-free, world-wide
+license to reproduce, analyze, test, perform and/or display publicly,
+prepare derivative works, distribute, and otherwise use Python 1.6.1
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+   ======================================================================
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+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ======================================================================
+   ======================================================================
+
+Google Protocol Buffers
+
+Copyright 2008 Google Inc.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+    * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Code generated by the Protocol Buffer compiler is owned by the owner
+of the input file used when generating it.  This code is not
+standalone and requires a support library to be linked with it.  This
+support library is itself covered by the above license.
+
+   ======================================================================
+   ======================================================================
+
+OpenSSL License
+
+   You are receiving a copy of OpenSSL as part of this product in object
+   code form. The terms of the Oracle license do NOT apply to OpenSSL.
+   OpenSSL is licensed under a double license, of the OpenSSL License and
+   the original SSLeay license, separate from the Oracle product. If you
+   do not wish to install this library, you may remove it, but the Oracle
+   program might not operate properly or at all without it.
+  LICENSE ISSUES
+  ==============
+
+  The OpenSSL toolkit stays under a double license, i.e. both the conditions of
+  the OpenSSL License and the original SSLeay license apply to the toolkit.
+  See below for the actual license texts.
+
+  OpenSSL License
+  ---------------
+
+/* ====================================================================
+ * Copyright (c) 1998-2019 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+ Original SSLeay License
+ -----------------------
+
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+   ======================================================================
+   ======================================================================
+
+python-lz4
+
+Copyright (c) 2012-2013, Steeve Morin
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of Steeve Morin nor the names of its contributors may be
+   used to endorse or promote products derived from this software without
+   specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+============================================================
+
+Additional 4th party:
+py3c
+------
+from pyc3.h file in code directory:
+
+/*
+The MIT License (MIT)
+
+Copyright (c) 2015, Red Hat, Inc. and/or its affiliates
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+------------------------------------------------------------------------------
+
+lz4
+---
+from lz4.h file in lz4libs directory
+
+/*
+ *  LZ4 - Fast LZ compression algorithm
+ *  Header File
+ *  Copyright (C) 2011-present, Yann Collet.
+
+   BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are
+   met:
+
+       * Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+       * Redistributions in binary form must reproduce the above
+   copyright notice, this list of conditions and the following disclaimer
+   in the documentation and/or other materials provided with the
+   distribution.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+   You can contact the author at :
+    - LZ4 homepage : http://www.lz4.org
+    - LZ4 source repository : https://github.com/lz4/lz4
+*/
+
+** Future 4th party
+(https://files.pythonhosted.org/packages/90/52/e20466b85000a181e1e144fd8305caf
+2cf475e2f9674e797b222f8105f5f/future-0.17.1.tar.gz)
+Copyright (c) 2013-2018 Python Charmers Pty Ltd, Australia
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+   ======================================================================
+   ======================================================================
+
+python-zstandard
+
+   python-zstandard
+Copyright (c) 2016, Gregory Szorc
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors
+may be used to endorse or promote products derived from this software without
+specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+   ======================================================================
+   ======================================================================
+
+Six
+
+   Six
+Copyright (c) 2010-2020 Benjamin Peterson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+   ======================================================================
+   ======================================================================
+
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+
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+   receive the source code for that binary, you can obtain a copy of the
+   applicable source code by visiting
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+   binary was not provided to you with the binary, you can also receive a
+   copy of the source code on physical media by submitting a written
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+   using the following link:
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+  Oracle America, Inc.
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+       offers spare parts or customer support for that product model.
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/METADATA
new file mode 100644
index 0000000..4438096
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/METADATA
@@ -0,0 +1,41 @@
+Metadata-Version: 2.1
+Name: mysql-connector-python
+Version: 8.0.22
+Summary: MySQL driver written in Python
+Home-page: http://dev.mysql.com/doc/connector-python/en/index.html
+Author: Oracle and/or its affiliates
+Author-email: 
+License: GNU GPLv2 (with FOSS License Exception)
+Download-URL: http://dev.mysql.com/downloads/connector/python/
+Keywords: mysql db
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Other Environment
+Classifier: Intended Audience :: Developers
+Classifier: Intended Audience :: Education
+Classifier: Intended Audience :: Information Technology
+Classifier: Intended Audience :: System Administrators
+Classifier: License :: OSI Approved :: GNU General Public License (GPL)
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Topic :: Database
+Classifier: Topic :: Software Development
+Classifier: Topic :: Software Development :: Libraries :: Application Frameworks
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Requires-Dist: protobuf (>=3.0.0)
+Provides-Extra: compression
+Requires-Dist: lz4 (>=2.1.6) ; extra == 'compression'
+Requires-Dist: zstandard (>=0.12.0) ; extra == 'compression'
+Provides-Extra: dns-srv
+Requires-Dist: dnspython (>=1.16.0) ; extra == 'dns-srv'
+
+
+MySQL driver written in Python which does not depend on MySQL C client
+libraries and implements the DB API v2.0 specification (PEP-249).
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/RECORD
new file mode 100644
index 0000000..d974fdc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/RECORD
@@ -0,0 +1,144 @@
+_mysql_connector.cpython-38-x86_64-linux-gnu.so,sha256=z71ic9PlVwM5qpvD0PwSCf2Ro8S418KZGq7f-o-JOUA,22125888
+_mysqlxpb.cpython-38-x86_64-linux-gnu.so,sha256=5RyOf7_iHyR2TCJicqGquxub7R8qcnrMK19BxQH5cUQ,32557416
+mysql/__init__.py,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+mysql/__pycache__/__init__.cpython-38.pyc,,
+mysql/connector/__init__.py,sha256=iwjRx2p-T4bYRrNwO4pv3urhXhmEhkd8FAfmWCCwxDg,11031
+mysql/connector/__pycache__/__init__.cpython-38.pyc,,
+mysql/connector/__pycache__/abstracts.cpython-38.pyc,,
+mysql/connector/__pycache__/authentication.cpython-38.pyc,,
+mysql/connector/__pycache__/catch23.cpython-38.pyc,,
+mysql/connector/__pycache__/charsets.cpython-38.pyc,,
+mysql/connector/__pycache__/connection.cpython-38.pyc,,
+mysql/connector/__pycache__/connection_cext.cpython-38.pyc,,
+mysql/connector/__pycache__/constants.cpython-38.pyc,,
+mysql/connector/__pycache__/conversion.cpython-38.pyc,,
+mysql/connector/__pycache__/cursor.cpython-38.pyc,,
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diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/REQUESTED b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/REQUESTED
new file mode 100644
index 0000000..e69de29
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/WHEEL
new file mode 100644
index 0000000..929285d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.35.1)
+Root-Is-Purelib: false
+Tag: cp38-cp38-linux_x86_64
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/top_level.txt
new file mode 100644
index 0000000..d05e344
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysql_connector_python-8.0.22.dist-info/top_level.txt
@@ -0,0 +1,4 @@
+_mysql_connector
+_mysqlxpb
+mysql
+mysqlx
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/__init__.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/__init__.py
new file mode 100644
index 0000000..aebb4d1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/__init__.py
@@ -0,0 +1,790 @@
+# Copyright (c) 2016, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""MySQL X DevAPI Python implementation"""
+
+import re
+import json
+import logging
+import ssl
+
+from . import constants
+from .compat import (INT_TYPES, STRING_TYPES, JSONDecodeError, urlparse,
+                     unquote, parse_qsl)
+from .connection import Client, Session
+from .constants import (Auth, LockContention, OPENSSL_CS_NAMES, SSLMode,
+                        TLS_VERSIONS, TLS_CIPHER_SUITES)
+from .crud import Schema, Collection, Table, View
+from .dbdoc import DbDoc
+# pylint: disable=W0622
+from .errors import (Error, InterfaceError, DatabaseError, NotSupportedError,
+                     DataError, IntegrityError, ProgrammingError,
+                     OperationalError, InternalError, PoolError, TimeoutError)
+from .result import (Column, Row, Result, BufferingResult, RowResult,
+                     SqlResult, DocResult, ColumnType)
+from .statement import (Statement, FilterableStatement, SqlStatement,
+                        FindStatement, AddStatement, RemoveStatement,
+                        ModifyStatement, SelectStatement, InsertStatement,
+                        DeleteStatement, UpdateStatement,
+                        CreateCollectionIndexStatement, Expr, ReadStatement,
+                        WriteStatement)
+
+from .expr import ExprParser as expr
+
+_SPLIT_RE = re.compile(r",(?![^\(\)]*\))")
+_PRIORITY_RE = re.compile(r"^\(address=(.+),priority=(\d+)\)$", re.VERBOSE)
+_ROUTER_RE = re.compile(r"^\(address=(.+)[,]*\)$", re.VERBOSE)
+_URI_SCHEME_RE = re.compile(r"^([a-zA-Z][a-zA-Z0-9+\-.]+)://(.*)")
+_SSL_OPTS = ["ssl-cert", "ssl-ca", "ssl-key", "ssl-crl", "tls-versions",
+             "tls-ciphersuites"]
+_SESS_OPTS = _SSL_OPTS + ["user", "password", "schema", "host", "port",
+                          "routers", "socket", "ssl-mode", "auth", "use-pure",
+                          "connect-timeout", "connection-attributes",
+                          "compression", "compression-algorithms", "dns-srv"]
+
+logging.getLogger(__name__).addHandler(logging.NullHandler())
+
+DUPLICATED_IN_LIST_ERROR = (
+    "The '{list}' list must not contain repeated values, the value "
+    "'{value}' is duplicated.")
+
+TLS_VERSION_ERROR = ("The given tls-version: '{}' is not recognized as a valid "
+                     "TLS protocol version (should be one of {}).")
+
+TLS_VER_NO_SUPPORTED = ("No supported TLS protocol version found in the "
+                        "'tls-versions' list '{}'. ")
+
+TLS_VERSIONS = ["TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3"]
+
+TLS_V1_3_SUPPORTED = False
+if hasattr(ssl, "HAS_TLSv1_3") and ssl.HAS_TLSv1_3:
+    TLS_V1_3_SUPPORTED = True
+
+
+def _parse_address_list(path):
+    """Parses a list of host, port pairs
+
+    Args:
+        path: String containing a list of routers or just router
+
+    Returns:
+        Returns a dict with parsed values of host, port and priority if
+        specified.
+    """
+    path = path.replace(" ", "")
+    array = not("," not in path and path.count(":") > 1
+                and path.count("[") == 1) and path.startswith("[") \
+                and path.endswith("]")
+
+    routers = []
+    address_list = _SPLIT_RE.split(path[1:-1] if array else path)
+    priority_count = 0
+    for address in address_list:
+        router = {}
+
+        match = _PRIORITY_RE.match(address)
+        if match:
+            address = match.group(1)
+            router["priority"] = int(match.group(2))
+            priority_count += 1
+        else:
+            match = _ROUTER_RE.match(address)
+            if match:
+                address = match.group(1)
+                router["priority"] = 100
+
+        match = urlparse("//{0}".format(address))
+        if not match.hostname:
+            raise InterfaceError("Invalid address: {0}".format(address))
+
+        try:
+            router.update(host=match.hostname, port=match.port)
+        except ValueError as err:
+            raise ProgrammingError("Invalid URI: {0}".format(err), 4002)
+
+        routers.append(router)
+
+    if 0 < priority_count < len(address_list):
+        raise ProgrammingError("You must either assign no priority to any "
+                               "of the routers or give a priority for "
+                               "every router", 4000)
+
+    return {"routers": routers} if array else routers[0]
+
+
+def _parse_connection_uri(uri):
+    """Parses the connection string and returns a dictionary with the
+    connection settings.
+
+    Args:
+        uri: mysqlx URI scheme to connect to a MySQL server/farm.
+
+    Returns:
+        Returns a dict with parsed values of credentials and address of the
+        MySQL server/farm.
+
+    Raises:
+        :class:`mysqlx.InterfaceError`: If contains a duplicate option or
+                                        URI scheme is not valid.
+    """
+    settings = {"schema": ""}
+
+    match = _URI_SCHEME_RE.match(uri)
+    scheme, uri = match.groups() if match else ("mysqlx", uri)
+
+    if scheme not in ("mysqlx", "mysqlx+srv"):
+        raise InterfaceError("Scheme '{0}' is not valid".format(scheme))
+
+    if scheme == "mysqlx+srv":
+        settings["dns-srv"] = True
+
+    userinfo, tmp = uri.partition("@")[::2]
+    host, query_str = tmp.partition("?")[::2]
+
+    pos = host.rfind("/")
+    if host[pos:].find(")") == -1 and pos > 0:
+        host, settings["schema"] = host.rsplit("/", 1)
+    host = host.strip("()")
+
+    if not host or not userinfo or ":" not in userinfo:
+        raise InterfaceError("Malformed URI '{0}'".format(uri))
+    user, password = userinfo.split(":", 1)
+    settings["user"], settings["password"] = unquote(user), unquote(password)
+
+    if host.startswith(("/", "..", ".")):
+        settings["socket"] = unquote(host)
+    elif host.startswith("\\."):
+        raise InterfaceError("Windows Pipe is not supported")
+    else:
+        settings.update(_parse_address_list(host))
+
+    invalid_options = ("user", "password", "dns-srv")
+    for key, val in parse_qsl(query_str, True):
+        opt = key.replace("_", "-").lower()
+        if opt in invalid_options:
+            raise InterfaceError("Invalid option: '{0}'".format(key))
+        if opt in settings:
+            raise InterfaceError("Duplicate option: '{0}'".format(key))
+        if opt in _SSL_OPTS:
+            settings[opt] = unquote(val.strip("()"))
+        else:
+            val_str = val.lower()
+            if val_str in ("1", "true"):
+                settings[opt] = True
+            elif val_str in ("0", "false"):
+                settings[opt] = False
+            else:
+                settings[opt] = val_str
+    return settings
+
+
+def _validate_settings(settings):
+    """Validates the settings to be passed to a Session object
+    the port values are converted to int if specified or set to 33060
+    otherwise. The priority values for each router is converted to int
+    if specified.
+
+    Args:
+        settings: dict containing connection settings.
+
+    Raises:
+        :class:`mysqlx.InterfaceError`: On any configuration issue.
+    """
+    invalid_opts = set(settings.keys()).difference(_SESS_OPTS)
+    if invalid_opts:
+        raise InterfaceError("Invalid option(s): '{0}'"
+                             "".format("', '".join(invalid_opts)))
+
+    if "routers" in settings:
+        for router in settings["routers"]:
+            _validate_hosts(router, 33060)
+    elif "host" in settings:
+        _validate_hosts(settings)
+
+    if "ssl-mode" in settings:
+        try:
+            settings["ssl-mode"] = settings["ssl-mode"].lower()
+            SSLMode.index(settings["ssl-mode"])
+        except (AttributeError, ValueError):
+            raise InterfaceError("Invalid SSL Mode '{0}'"
+                                 "".format(settings["ssl-mode"]))
+        if settings["ssl-mode"] == SSLMode.DISABLED and \
+            any(key in settings for key in _SSL_OPTS):
+            raise InterfaceError("SSL options used with ssl-mode 'disabled'")
+
+    if "ssl-crl" in settings and not "ssl-ca" in settings:
+        raise InterfaceError("CA Certificate not provided")
+    if "ssl-key" in settings and not "ssl-cert" in settings:
+        raise InterfaceError("Client Certificate not provided")
+
+    if not "ssl-ca" in settings and settings.get("ssl-mode") \
+        in [SSLMode.VERIFY_IDENTITY, SSLMode.VERIFY_CA]:
+        raise InterfaceError("Cannot verify Server without CA")
+    if "ssl-ca" in settings and settings.get("ssl-mode") \
+        not in [SSLMode.VERIFY_IDENTITY, SSLMode.VERIFY_CA]:
+        raise InterfaceError("Must verify Server if CA is provided")
+
+    if "auth" in settings:
+        try:
+            settings["auth"] = settings["auth"].lower()
+            Auth.index(settings["auth"])
+        except (AttributeError, ValueError):
+            raise InterfaceError("Invalid Auth '{0}'".format(settings["auth"]))
+
+    if "compression" in settings:
+        compression = settings["compression"].lower().strip()
+        if compression not in ("preferred", "required", "disabled"):
+            raise InterfaceError(
+                "The connection property 'compression' acceptable values are: "
+                "'preferred', 'required', or 'disabled'. The value '{0}' is "
+                "not acceptable".format(settings["compression"]))
+        settings["compression"] = compression
+
+    if "compression-algorithms" in settings:
+        if isinstance(settings["compression-algorithms"], STRING_TYPES):
+            compression_algorithms = \
+                settings["compression-algorithms"].strip().strip("[]")
+            if compression_algorithms:
+                settings["compression-algorithms"] = \
+                    compression_algorithms.split(",")
+            else:
+                settings["compression-algorithms"] = None
+        elif not isinstance(settings["compression-algorithms"], (list, tuple)):
+            raise InterfaceError("Invalid type of the connection property "
+                                 "'compression-algorithms'")
+        if settings.get("compression") == "disabled":
+            settings["compression-algorithms"] = None
+
+    if "connection-attributes" in settings:
+        _validate_connection_attributes(settings)
+
+    if "connect-timeout" in settings:
+        try:
+            if isinstance(settings["connect-timeout"], STRING_TYPES):
+                settings["connect-timeout"] = int(settings["connect-timeout"])
+            if not isinstance(settings["connect-timeout"], INT_TYPES) \
+               or settings["connect-timeout"] < 0:
+                raise ValueError
+        except ValueError:
+            raise TypeError("The connection timeout value must be a positive "
+                            "integer (including 0)")
+
+    if "dns-srv" in settings:
+        if not isinstance(settings["dns-srv"], bool):
+            raise InterfaceError("The value of 'dns-srv' must be a boolean")
+        if settings.get("socket"):
+            raise InterfaceError("Using Unix domain sockets with DNS SRV "
+                                 "lookup is not allowed")
+        if settings.get("port"):
+            raise InterfaceError("Specifying a port number with DNS SRV "
+                                 "lookup is not allowed")
+        if settings.get("routers"):
+            raise InterfaceError("Specifying multiple hostnames with DNS "
+                                 "SRV look up is not allowed")
+    elif "host" in settings and not settings.get("port"):
+        settings["port"] = 33060
+
+    if "tls-versions" in settings:
+        _validate_tls_versions(settings)
+
+    if "tls-ciphersuites" in settings:
+        _validate_tls_ciphersuites(settings)
+
+
+def _validate_hosts(settings, default_port=None):
+    """Validate hosts.
+
+    Args:
+        settings (dict): Settings dictionary.
+        default_port (int): Default connection port.
+
+    Raises:
+        :class:`mysqlx.InterfaceError`: If priority or port are invalid.
+    """
+    if "priority" in settings and settings["priority"]:
+        try:
+            settings["priority"] = int(settings["priority"])
+            if settings["priority"] < 0 or settings["priority"] > 100:
+                raise ProgrammingError("Invalid priority value, "
+                                       "must be between 0 and 100", 4007)
+        except NameError:
+            raise ProgrammingError("Invalid priority", 4007)
+        except ValueError:
+            raise ProgrammingError(
+                "Invalid priority: {}".format(settings["priority"]), 4007)
+
+    if "port" in settings and settings["port"]:
+        try:
+            settings["port"] = int(settings["port"])
+        except NameError:
+            raise InterfaceError("Invalid port")
+    elif "host" in settings and default_port:
+        settings["port"] = default_port
+
+
+def _validate_connection_attributes(settings):
+    """Validate connection-attributes.
+
+    Args:
+        settings (dict): Settings dictionary.
+
+    Raises:
+        :class:`mysqlx.InterfaceError`: If attribute name or value exceeds size.
+    """
+    attributes = {}
+    if "connection-attributes" not in settings:
+        return
+
+    conn_attrs = settings["connection-attributes"]
+
+    if isinstance(conn_attrs, STRING_TYPES):
+        if conn_attrs == "":
+            settings["connection-attributes"] = {}
+            return
+        if not (conn_attrs.startswith("[") and conn_attrs.endswith("]")) and \
+           not conn_attrs in ['False', "false", "True", "true"]:
+            raise InterfaceError("The value of 'connection-attributes' must "
+                                 "be a boolean or a list of key-value pairs, "
+                                 "found: '{}'".format(conn_attrs))
+        elif conn_attrs in ['False', "false", "True", "true"]:
+            if conn_attrs in ['False', "false"]:
+                settings["connection-attributes"] = False
+            else:
+                settings["connection-attributes"] = {}
+            return
+        else:
+            conn_attributes = conn_attrs[1:-1].split(",")
+            for attr in conn_attributes:
+                if attr == "":
+                    continue
+                attr_name_val = attr.split('=')
+                attr_name = attr_name_val[0]
+                attr_val = attr_name_val[1] if len(attr_name_val) > 1 else ""
+                if attr_name in attributes:
+                    raise InterfaceError("Duplicate key '{}' used in "
+                                         "connection-attributes"
+                                         "".format(attr_name))
+                else:
+                    attributes[attr_name] = attr_val
+    elif isinstance(conn_attrs, dict):
+        for attr_name in conn_attrs:
+            attr_value = conn_attrs[attr_name]
+            if not isinstance(attr_value, STRING_TYPES):
+                attr_value = repr(attr_value)
+            attributes[attr_name] = attr_value
+    elif isinstance(conn_attrs, bool) or conn_attrs in [0, 1]:
+        if conn_attrs:
+            settings["connection-attributes"] = {}
+        else:
+            settings["connection-attributes"] = False
+        return
+    elif isinstance(conn_attrs, set):
+        for attr_name in conn_attrs:
+            attributes[attr_name] = ""
+    elif isinstance(conn_attrs, list):
+        for attr in conn_attrs:
+            if attr == "":
+                continue
+            attr_name_val = attr.split('=')
+            attr_name = attr_name_val[0]
+            attr_val = attr_name_val[1] if len(attr_name_val) > 1 else ""
+            if attr_name in attributes:
+                raise InterfaceError("Duplicate key '{}' used in "
+                                     "connection-attributes"
+                                     "".format(attr_name))
+            else:
+                attributes[attr_name] = attr_val
+    elif not isinstance(conn_attrs, bool):
+        raise InterfaceError("connection-attributes must be Boolean or a list "
+                             "of key-value pairs, found: '{}'"
+                             "".format(conn_attrs))
+
+    if attributes:
+        for attr_name in attributes:
+            attr_value = attributes[attr_name]
+
+            # Validate name type
+            if not isinstance(attr_name, STRING_TYPES):
+                raise InterfaceError("Attribute name '{}' must be a string"
+                                     "type".format(attr_name))
+            # Validate attribute name limit 32 characters
+            if len(attr_name) > 32:
+                raise InterfaceError("Attribute name '{}' exceeds 32 "
+                                     "characters limit size".format(attr_name))
+            # Validate names in connection-attributes cannot start with "_"
+            if attr_name.startswith("_"):
+                raise InterfaceError("Key names in connection-attributes "
+                                     "cannot start with '_', found: '{}'"
+                                     "".format(attr_name))
+
+            # Validate value type
+            if not isinstance(attr_value, STRING_TYPES):
+                raise InterfaceError("Attribute '{}' value: '{}' must "
+                                     "be a string type"
+                                     "".format(attr_name, attr_value))
+            # Validate attribute value limit 1024 characters
+            if len(attr_value) > 1024:
+                raise InterfaceError("Attribute '{}' value: '{}' "
+                                     "exceeds 1024 characters limit size"
+                                     "".format(attr_name, attr_value))
+
+    settings["connection-attributes"] = attributes
+
+
+def _validate_tls_versions(settings):
+    """Validate tls-versions.
+
+    Args:
+        settings (dict): Settings dictionary.
+
+    Raises:
+        :class:`mysqlx.InterfaceError`: If tls-versions name is not valid.
+    """
+    tls_versions = []
+    if "tls-versions" not in settings:
+        return
+
+    tls_versions_settings = settings["tls-versions"]
+
+    if isinstance(tls_versions_settings, STRING_TYPES):
+        if not (tls_versions_settings.startswith("[") and
+                tls_versions_settings.endswith("]")):
+            raise InterfaceError("tls-versions must be a list, found: '{}'"
+                                 "".format(tls_versions_settings))
+        else:
+            tls_vers = tls_versions_settings[1:-1].split(",")
+            for tls_ver in tls_vers:
+                tls_version = tls_ver.strip()
+                if tls_version == "":
+                    continue
+                if tls_version not in TLS_VERSIONS:
+                    raise InterfaceError(TLS_VERSION_ERROR.format(tls_version,
+                                                                  TLS_VERSIONS))
+                else:
+                    if tls_version in tls_versions:
+                        raise InterfaceError(
+                            DUPLICATED_IN_LIST_ERROR.format(
+                                list="tls_versions", value=tls_version))
+                    tls_versions.append(tls_version)
+    elif isinstance(tls_versions_settings, list):
+        if not tls_versions_settings:
+            raise InterfaceError("At least one TLS protocol version must be "
+                                 "specified in 'tls-versions' list.")
+        for tls_ver in tls_versions_settings:
+            if tls_ver not in TLS_VERSIONS:
+                raise InterfaceError(TLS_VERSION_ERROR.format(tls_ver,
+                                                              TLS_VERSIONS))
+            elif tls_ver in tls_versions:
+                raise InterfaceError(
+                    DUPLICATED_IN_LIST_ERROR.format(list="tls_versions",
+                                                    value=tls_ver))
+            else:
+                tls_versions.append(tls_ver)
+
+    elif isinstance(tls_versions_settings, set):
+        for tls_ver in tls_versions_settings:
+            if tls_ver not in TLS_VERSIONS:
+                raise InterfaceError(TLS_VERSION_ERROR.format(tls_ver,
+                                                              TLS_VERSIONS))
+            else:
+                tls_versions.append(tls_ver)
+    else:
+        raise InterfaceError("tls-versions should be a list with one or more "
+                             "of versions in {}. found: '{}'"
+                             "".format(", ".join(TLS_VERSIONS), tls_versions))
+
+    if not tls_versions:
+        raise InterfaceError("At least one TLS protocol version must be "
+                             "specified in 'tls-versions' list.")
+
+    if tls_versions == ["TLSv1.3"] and not TLS_V1_3_SUPPORTED:
+            raise InterfaceError(
+                TLS_VER_NO_SUPPORTED.format(tls_versions, TLS_VERSIONS))
+
+    settings["tls-versions"] = tls_versions
+
+
+def _validate_tls_ciphersuites(settings):
+    """Validate tls-ciphersuites.
+
+    Args:
+        settings (dict): Settings dictionary.
+
+    Raises:
+        :class:`mysqlx.InterfaceError`: If tls-ciphersuites name is not valid.
+    """
+    tls_ciphersuites = []
+    if "tls-ciphersuites" not in settings:
+        return
+
+    tls_ciphersuites_settings = settings["tls-ciphersuites"]
+
+    if isinstance(tls_ciphersuites_settings, STRING_TYPES):
+        if not (tls_ciphersuites_settings.startswith("[") and
+                tls_ciphersuites_settings.endswith("]")):
+            raise InterfaceError("tls-ciphersuites must be a list, found: '{}'"
+                                 "".format(tls_ciphersuites_settings))
+        else:
+            tls_css = tls_ciphersuites_settings[1:-1].split(",")
+            if not tls_css:
+                raise InterfaceError("No valid cipher suite found in the "
+                                     "'tls-ciphersuites' list.")
+            for tls_cs in tls_css:
+                tls_cs = tls_cs.strip().upper()
+                if tls_cs:
+                    tls_ciphersuites.append(tls_cs)
+    elif isinstance(tls_ciphersuites_settings, list):
+        tls_ciphersuites = [tls_cs for tls_cs in tls_ciphersuites_settings
+                            if tls_cs]
+
+    elif isinstance(tls_ciphersuites_settings, set):
+        for tls_cs in tls_ciphersuites:
+            if tls_cs:
+                tls_ciphersuites.append(tls_cs)
+    else:
+        raise InterfaceError("tls-ciphersuites should be a list with one or "
+                             "more ciphersuites. Found: '{}'"
+                             "".format(tls_ciphersuites_settings))
+
+    tls_versions = TLS_VERSIONS[:] if settings.get("tls-versions", None) \
+       is None else settings["tls-versions"][:]
+
+    # A newer TLS version can use a cipher introduced on
+    # an older version.
+    tls_versions.sort(reverse=True)
+    newer_tls_ver = tls_versions[0]
+
+    translated_names = []
+    iani_cipher_suites_names = {}
+    ossl_cipher_suites_names = []
+
+    # Old ciphers can work with new TLS versions.
+    # Find all the ciphers introduced on previous TLS versions
+    for tls_ver in TLS_VERSIONS[:TLS_VERSIONS.index(newer_tls_ver) + 1]:
+        iani_cipher_suites_names.update(TLS_CIPHER_SUITES[tls_ver])
+        ossl_cipher_suites_names.extend(OPENSSL_CS_NAMES[tls_ver])
+
+    for name in tls_ciphersuites:
+        if "-" in name and name in ossl_cipher_suites_names:
+            translated_names.append(name)
+        elif name in iani_cipher_suites_names:
+            translated_name = iani_cipher_suites_names[name]
+            if translated_name in translated_names:
+                raise AttributeError(
+                    DUPLICATED_IN_LIST_ERROR.format(
+                        list="tls_ciphersuites", value=translated_name))
+            else:
+                translated_names.append(translated_name)
+        else:
+            raise InterfaceError(
+                "The value '{}' in cipher suites is not a valid "
+                "cipher suite".format(name))
+
+    if not translated_names:
+        raise InterfaceError("No valid cipher suite found in the "
+                             "'tls-ciphersuites' list.")
+
+    settings["tls-ciphersuites"] = translated_names
+
+
+def _get_connection_settings(*args, **kwargs):
+    """Parses the connection string and returns a dictionary with the
+    connection settings.
+
+    Args:
+        *args: Variable length argument list with the connection data used
+               to connect to the database. It can be a dictionary or a
+               connection string.
+        **kwargs: Arbitrary keyword arguments with connection data used to
+                  connect to the database.
+
+    Returns:
+        mysqlx.Session: Session object.
+
+    Raises:
+        TypeError: If connection timeout is not a positive integer.
+        :class:`mysqlx.InterfaceError`: If settings not provided.
+    """
+    settings = {}
+    if args:
+        if isinstance(args[0], STRING_TYPES):
+            settings = _parse_connection_uri(args[0])
+        elif isinstance(args[0], dict):
+            for key, val in args[0].items():
+                settings[key.replace("_", "-")] = val
+    elif kwargs:
+        for key, val in kwargs.items():
+            settings[key.replace("_", "-")] = val
+
+    if not settings:
+        raise InterfaceError("Settings not provided")
+
+    _validate_settings(settings)
+    return settings
+
+
+def get_session(*args, **kwargs):
+    """Creates a Session instance using the provided connection data.
+
+    Args:
+        *args: Variable length argument list with the connection data used
+               to connect to a MySQL server. It can be a dictionary or a
+               connection string.
+        **kwargs: Arbitrary keyword arguments with connection data used to
+                  connect to the database.
+
+    Returns:
+        mysqlx.Session: Session object.
+    """
+    settings = _get_connection_settings(*args, **kwargs)
+    return Session(settings)
+
+
+def get_client(connection_string, options_string):
+    """Creates a Client instance with the provided connection data and settings.
+
+    Args:
+        connection_string: A string or a dict type object to indicate the \
+            connection data used to connect to a MySQL server.
+
+            The string must have the following uri format::
+
+                cnx_str = 'mysqlx://{user}:{pwd}@{host}:{port}'
+                cnx_str = ('mysqlx://{user}:{pwd}@['
+                           '    (address={host}:{port}, priority=n),'
+                           '    (address={host}:{port}, priority=n), ...]'
+                           '       ?[option=value]')
+
+            And the dictionary::
+
+                cnx_dict = {
+                    'host': 'The host where the MySQL product is running',
+                    'port': '(int) the port number configured for X protocol',
+                    'user': 'The user name account',
+                    'password': 'The password for the given user account',
+                    'ssl-mode': 'The flags for ssl mode in mysqlx.SSLMode.FLAG',
+                    'ssl-ca': 'The path to the ca.cert'
+                    "connect-timeout": '(int) milliseconds to wait on timeout'
+                }
+
+        options_string: A string in the form of a document or a dictionary \
+            type with configuration for the client.
+
+            Current options include::
+
+                options = {
+                    'pooling': {
+                        'enabled': (bool), # [True | False], True by default
+                        'max_size': (int), # Maximum connections per pool
+                        "max_idle_time": (int), # milliseconds that a
+                            # connection will remain active while not in use.
+                            # By default 0, means infinite.
+                        "queue_timeout": (int), # milliseconds a request will
+                            # wait for a connection to become available.
+                            # By default 0, means infinite.
+                    }
+                }
+
+    Returns:
+        mysqlx.Client: Client object.
+
+    .. versionadded:: 8.0.13
+    """
+    if not isinstance(connection_string, (STRING_TYPES, dict)):
+        raise InterfaceError("connection_data must be a string or dict")
+
+    settings_dict = _get_connection_settings(connection_string)
+
+    if not isinstance(options_string, (STRING_TYPES, dict)):
+        raise InterfaceError("connection_options must be a string or dict")
+
+    if isinstance(options_string, STRING_TYPES):
+        try:
+            options_dict = json.loads(options_string)
+        except JSONDecodeError:
+            raise InterfaceError("'pooling' options must be given in the form "
+                                 "of a document or dict")
+    else:
+        options_dict = {}
+        for key, value in options_string.items():
+            options_dict[key.replace("-", "_")] = value
+
+    if not isinstance(options_dict, dict):
+        raise InterfaceError("'pooling' options must be given in the form of a "
+                             "document or dict")
+    pooling_options_dict = {}
+    if "pooling" in options_dict:
+        pooling_options = options_dict.pop("pooling")
+        if not isinstance(pooling_options, (dict)):
+            raise InterfaceError("'pooling' options must be given in the form "
+                                 "document or dict")
+        # Fill default pooling settings
+        pooling_options_dict["enabled"] = pooling_options.pop("enabled", True)
+        pooling_options_dict["max_size"] = pooling_options.pop("max_size", 25)
+        pooling_options_dict["max_idle_time"] = \
+            pooling_options.pop("max_idle_time", 0)
+        pooling_options_dict["queue_timeout"] = \
+            pooling_options.pop("queue_timeout", 0)
+
+        # No other options besides pooling are supported
+        if len(pooling_options) > 0:
+            raise InterfaceError("Unrecognized pooling options: {}"
+                                 "".format(pooling_options))
+        # No other options besides pooling are supported
+        if len(options_dict) > 0:
+            raise InterfaceError("Unrecognized connection options: {}"
+                                 "".format(options_dict.keys()))
+
+    return Client(settings_dict, pooling_options_dict)
+
+
+__all__ = [
+    # mysqlx.connection
+    "Client", "Session", "get_client", "get_session", "expr",
+
+    # mysqlx.constants
+    "Auth", "LockContention", "SSLMode",
+
+    # mysqlx.crud
+    "Schema", "Collection", "Table", "View",
+
+    # mysqlx.errors
+    "Error", "InterfaceError", "DatabaseError", "NotSupportedError",
+    "DataError", "IntegrityError", "ProgrammingError", "OperationalError",
+    "InternalError", "PoolError", "TimeoutError",
+
+    # mysqlx.result
+    "Column", "Row", "Result", "BufferingResult", "RowResult",
+    "SqlResult", "DocResult", "ColumnType",
+
+    # mysqlx.statement
+    "DbDoc", "Statement", "FilterableStatement", "SqlStatement",
+    "FindStatement", "AddStatement", "RemoveStatement", "ModifyStatement",
+    "SelectStatement", "InsertStatement", "DeleteStatement", "UpdateStatement",
+    "CreateCollectionIndexStatement", "Expr",
+]
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diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/authentication.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/authentication.py
new file mode 100644
index 0000000..a512560
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/authentication.py
@@ -0,0 +1,180 @@
+# Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementation of MySQL Authentication Plugin."""
+
+import hashlib
+import struct
+
+from .compat import PY3, UNICODE_TYPES, hexlify
+
+
+def xor_string(hash1, hash2, hash_size):
+    """Encrypt/Decrypt function used for password encryption in
+    authentication, using a simple XOR.
+
+    Args:
+        hash1 (str): The first hash.
+        hash2 (str): The second hash.
+
+    Returns:
+        str: A string with the xor applied.
+    """
+    if PY3:
+        xored = [h1 ^ h2 for (h1, h2) in zip(hash1, hash2)]
+    else:
+        xored = [ord(h1) ^ ord(h2) for (h1, h2) in zip(hash1, hash2)]
+    return struct.pack("{0}B".format(hash_size), *xored)
+
+
+class BaseAuthPlugin(object):
+    """Base class for implementing the authentication plugins."""
+    def __init__(self, username=None, password=None):
+        self._username = username
+        self._password = password
+
+    def name(self):
+        """Returns the plugin name.
+
+        Returns:
+            str: The plugin name.
+        """
+        raise NotImplementedError
+
+    def auth_name(self):
+        """Returns the authentication name.
+
+        Returns:
+            str: The authentication name.
+        """
+        raise NotImplementedError
+
+
+class MySQL41AuthPlugin(BaseAuthPlugin):
+    """Class implementing the MySQL Native Password authentication plugin."""
+    def name(self):
+        """Returns the plugin name.
+
+        Returns:
+            str: The plugin name.
+        """
+        return "MySQL 4.1 Authentication Plugin"
+
+    def auth_name(self):
+        """Returns the authentication name.
+
+        Returns:
+            str: The authentication name.
+        """
+        return "MYSQL41"
+
+    def auth_data(self, data):
+        """Hashing for MySQL 4.1 authentication.
+
+        Args:
+            data (str): The authentication data.
+
+        Returns:
+            str: The authentication response.
+        """
+        if self._password:
+            password = self._password.encode("utf-8") \
+                if isinstance(self._password, UNICODE_TYPES) else self._password
+            hash1 = hashlib.sha1(password).digest()
+            hash2 = hashlib.sha1(hash1).digest()
+            xored = xor_string(hash1, hashlib.sha1(data + hash2).digest(), 20)
+            return "{0}\0{1}\0*{2}\0".format("", self._username, hexlify(xored))
+        return "{0}\0{1}\0".format("", self._username)
+
+
+class PlainAuthPlugin(BaseAuthPlugin):
+    """Class implementing the MySQL Plain authentication plugin."""
+    def name(self):
+        """Returns the plugin name.
+
+        Returns:
+            str: The plugin name.
+        """
+        return "Plain Authentication Plugin"
+
+    def auth_name(self):
+        """Returns the authentication name.
+
+        Returns:
+            str: The authentication name.
+        """
+        return "PLAIN"
+
+    def auth_data(self):
+        """Returns the authentication data.
+
+        Returns:
+            str: The authentication data.
+        """
+        password = self._password.encode("utf-8") \
+            if isinstance(self._password, UNICODE_TYPES) and not PY3 \
+               else self._password
+        return "\0{0}\0{1}".format(self._username, password)
+
+
+class Sha256MemoryAuthPlugin(BaseAuthPlugin):
+    """Class implementing the SHA256_MEMORY authentication plugin."""
+    def name(self):
+        """Returns the plugin name.
+
+        Returns:
+            str: The plugin name.
+        """
+        return "SHA256_MEMORY Authentication Plugin"
+
+    def auth_name(self):
+        """Returns the authentication name.
+
+        Returns:
+            str: The authentication name.
+        """
+        return "SHA256_MEMORY"
+
+    def auth_data(self, data):
+        """Hashing for SHA256_MEMORY authentication.
+
+        The scramble is of the form:
+            SHA256(SHA256(SHA256(PASSWORD)),NONCE) XOR SHA256(PASSWORD)
+
+        Args:
+            data (str): The authentication data.
+
+        Returns:
+            str: The authentication response.
+        """
+        password = self._password.encode("utf-8") \
+            if isinstance(self._password, UNICODE_TYPES) else self._password
+        hash1 = hashlib.sha256(password).digest()
+        hash2 = hashlib.sha256(hashlib.sha256(hash1).digest() + data).digest()
+        xored = xor_string(hash2, hash1, 32)
+        return "\0{0}\0{1}".format(self._username, hexlify(xored))
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/charsets.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/charsets.py
new file mode 100644
index 0000000..90d5d47
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/charsets.py
@@ -0,0 +1,350 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# This file was auto-generated.
+_GENERATED_ON = '2019-04-29'
+_MYSQL_VERSION = (8, 0, 17)
+
+"""This module contains the MySQL Server Character Sets"""
+
+MYSQL_CHARACTER_SETS = [
+    # (character set name, collation, default)
+    None,
+    ("big5", "big5_chinese_ci", True),  # 1
+    ("latin2", "latin2_czech_cs", False),  # 2
+    ("dec8", "dec8_swedish_ci", True),  # 3
+    ("cp850", "cp850_general_ci", True),  # 4
+    ("latin1", "latin1_german1_ci", False),  # 5
+    ("hp8", "hp8_english_ci", True),  # 6
+    ("koi8r", "koi8r_general_ci", True),  # 7
+    ("latin1", "latin1_swedish_ci", True),  # 8
+    ("latin2", "latin2_general_ci", True),  # 9
+    ("swe7", "swe7_swedish_ci", True),  # 10
+    ("ascii", "ascii_general_ci", True),  # 11
+    ("ujis", "ujis_japanese_ci", True),  # 12
+    ("sjis", "sjis_japanese_ci", True),  # 13
+    ("cp1251", "cp1251_bulgarian_ci", False),  # 14
+    ("latin1", "latin1_danish_ci", False),  # 15
+    ("hebrew", "hebrew_general_ci", True),  # 16
+    None,
+    ("tis620", "tis620_thai_ci", True),  # 18
+    ("euckr", "euckr_korean_ci", True),  # 19
+    ("latin7", "latin7_estonian_cs", False),  # 20
+    ("latin2", "latin2_hungarian_ci", False),  # 21
+    ("koi8u", "koi8u_general_ci", True),  # 22
+    ("cp1251", "cp1251_ukrainian_ci", False),  # 23
+    ("gb2312", "gb2312_chinese_ci", True),  # 24
+    ("greek", "greek_general_ci", True),  # 25
+    ("cp1250", "cp1250_general_ci", True),  # 26
+    ("latin2", "latin2_croatian_ci", False),  # 27
+    ("gbk", "gbk_chinese_ci", True),  # 28
+    ("cp1257", "cp1257_lithuanian_ci", False),  # 29
+    ("latin5", "latin5_turkish_ci", True),  # 30
+    ("latin1", "latin1_german2_ci", False),  # 31
+    ("armscii8", "armscii8_general_ci", True),  # 32
+    ("utf8", "utf8_general_ci", True),  # 33
+    ("cp1250", "cp1250_czech_cs", False),  # 34
+    ("ucs2", "ucs2_general_ci", True),  # 35
+    ("cp866", "cp866_general_ci", True),  # 36
+    ("keybcs2", "keybcs2_general_ci", True),  # 37
+    ("macce", "macce_general_ci", True),  # 38
+    ("macroman", "macroman_general_ci", True),  # 39
+    ("cp852", "cp852_general_ci", True),  # 40
+    ("latin7", "latin7_general_ci", True),  # 41
+    ("latin7", "latin7_general_cs", False),  # 42
+    ("macce", "macce_bin", False),  # 43
+    ("cp1250", "cp1250_croatian_ci", False),  # 44
+    ("utf8mb4", "utf8mb4_general_ci", False),  # 45
+    ("utf8mb4", "utf8mb4_bin", False),  # 46
+    ("latin1", "latin1_bin", False),  # 47
+    ("latin1", "latin1_general_ci", False),  # 48
+    ("latin1", "latin1_general_cs", False),  # 49
+    ("cp1251", "cp1251_bin", False),  # 50
+    ("cp1251", "cp1251_general_ci", True),  # 51
+    ("cp1251", "cp1251_general_cs", False),  # 52
+    ("macroman", "macroman_bin", False),  # 53
+    ("utf16", "utf16_general_ci", True),  # 54
+    ("utf16", "utf16_bin", False),  # 55
+    ("utf16le", "utf16le_general_ci", True),  # 56
+    ("cp1256", "cp1256_general_ci", True),  # 57
+    ("cp1257", "cp1257_bin", False),  # 58
+    ("cp1257", "cp1257_general_ci", True),  # 59
+    ("utf32", "utf32_general_ci", True),  # 60
+    ("utf32", "utf32_bin", False),  # 61
+    ("utf16le", "utf16le_bin", False),  # 62
+    ("binary", "binary", True),  # 63
+    ("armscii8", "armscii8_bin", False),  # 64
+    ("ascii", "ascii_bin", False),  # 65
+    ("cp1250", "cp1250_bin", False),  # 66
+    ("cp1256", "cp1256_bin", False),  # 67
+    ("cp866", "cp866_bin", False),  # 68
+    ("dec8", "dec8_bin", False),  # 69
+    ("greek", "greek_bin", False),  # 70
+    ("hebrew", "hebrew_bin", False),  # 71
+    ("hp8", "hp8_bin", False),  # 72
+    ("keybcs2", "keybcs2_bin", False),  # 73
+    ("koi8r", "koi8r_bin", False),  # 74
+    ("koi8u", "koi8u_bin", False),  # 75
+    ("utf8", "utf8_tolower_ci", False),  # 76
+    ("latin2", "latin2_bin", False),  # 77
+    ("latin5", "latin5_bin", False),  # 78
+    ("latin7", "latin7_bin", False),  # 79
+    ("cp850", "cp850_bin", False),  # 80
+    ("cp852", "cp852_bin", False),  # 81
+    ("swe7", "swe7_bin", False),  # 82
+    ("utf8", "utf8_bin", False),  # 83
+    ("big5", "big5_bin", False),  # 84
+    ("euckr", "euckr_bin", False),  # 85
+    ("gb2312", "gb2312_bin", False),  # 86
+    ("gbk", "gbk_bin", False),  # 87
+    ("sjis", "sjis_bin", False),  # 88
+    ("tis620", "tis620_bin", False),  # 89
+    ("ucs2", "ucs2_bin", False),  # 90
+    ("ujis", "ujis_bin", False),  # 91
+    ("geostd8", "geostd8_general_ci", True),  # 92
+    ("geostd8", "geostd8_bin", False),  # 93
+    ("latin1", "latin1_spanish_ci", False),  # 94
+    ("cp932", "cp932_japanese_ci", True),  # 95
+    ("cp932", "cp932_bin", False),  # 96
+    ("eucjpms", "eucjpms_japanese_ci", True),  # 97
+    ("eucjpms", "eucjpms_bin", False),  # 98
+    ("cp1250", "cp1250_polish_ci", False),  # 99
+    None,
+    ("utf16", "utf16_unicode_ci", False),  # 101
+    ("utf16", "utf16_icelandic_ci", False),  # 102
+    ("utf16", "utf16_latvian_ci", False),  # 103
+    ("utf16", "utf16_romanian_ci", False),  # 104
+    ("utf16", "utf16_slovenian_ci", False),  # 105
+    ("utf16", "utf16_polish_ci", False),  # 106
+    ("utf16", "utf16_estonian_ci", False),  # 107
+    ("utf16", "utf16_spanish_ci", False),  # 108
+    ("utf16", "utf16_swedish_ci", False),  # 109
+    ("utf16", "utf16_turkish_ci", False),  # 110
+    ("utf16", "utf16_czech_ci", False),  # 111
+    ("utf16", "utf16_danish_ci", False),  # 112
+    ("utf16", "utf16_lithuanian_ci", False),  # 113
+    ("utf16", "utf16_slovak_ci", False),  # 114
+    ("utf16", "utf16_spanish2_ci", False),  # 115
+    ("utf16", "utf16_roman_ci", False),  # 116
+    ("utf16", "utf16_persian_ci", False),  # 117
+    ("utf16", "utf16_esperanto_ci", False),  # 118
+    ("utf16", "utf16_hungarian_ci", False),  # 119
+    ("utf16", "utf16_sinhala_ci", False),  # 120
+    ("utf16", "utf16_german2_ci", False),  # 121
+    ("utf16", "utf16_croatian_ci", False),  # 122
+    ("utf16", "utf16_unicode_520_ci", False),  # 123
+    ("utf16", "utf16_vietnamese_ci", False),  # 124
+    None,
+    None,
+    None,
+    ("ucs2", "ucs2_unicode_ci", False),  # 128
+    ("ucs2", "ucs2_icelandic_ci", False),  # 129
+    ("ucs2", "ucs2_latvian_ci", False),  # 130
+    ("ucs2", "ucs2_romanian_ci", False),  # 131
+    ("ucs2", "ucs2_slovenian_ci", False),  # 132
+    ("ucs2", "ucs2_polish_ci", False),  # 133
+    ("ucs2", "ucs2_estonian_ci", False),  # 134
+    ("ucs2", "ucs2_spanish_ci", False),  # 135
+    ("ucs2", "ucs2_swedish_ci", False),  # 136
+    ("ucs2", "ucs2_turkish_ci", False),  # 137
+    ("ucs2", "ucs2_czech_ci", False),  # 138
+    ("ucs2", "ucs2_danish_ci", False),  # 139
+    ("ucs2", "ucs2_lithuanian_ci", False),  # 140
+    ("ucs2", "ucs2_slovak_ci", False),  # 141
+    ("ucs2", "ucs2_spanish2_ci", False),  # 142
+    ("ucs2", "ucs2_roman_ci", False),  # 143
+    ("ucs2", "ucs2_persian_ci", False),  # 144
+    ("ucs2", "ucs2_esperanto_ci", False),  # 145
+    ("ucs2", "ucs2_hungarian_ci", False),  # 146
+    ("ucs2", "ucs2_sinhala_ci", False),  # 147
+    ("ucs2", "ucs2_german2_ci", False),  # 148
+    ("ucs2", "ucs2_croatian_ci", False),  # 149
+    ("ucs2", "ucs2_unicode_520_ci", False),  # 150
+    ("ucs2", "ucs2_vietnamese_ci", False),  # 151
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    ("ucs2", "ucs2_general_mysql500_ci", False),  # 159
+    ("utf32", "utf32_unicode_ci", False),  # 160
+    ("utf32", "utf32_icelandic_ci", False),  # 161
+    ("utf32", "utf32_latvian_ci", False),  # 162
+    ("utf32", "utf32_romanian_ci", False),  # 163
+    ("utf32", "utf32_slovenian_ci", False),  # 164
+    ("utf32", "utf32_polish_ci", False),  # 165
+    ("utf32", "utf32_estonian_ci", False),  # 166
+    ("utf32", "utf32_spanish_ci", False),  # 167
+    ("utf32", "utf32_swedish_ci", False),  # 168
+    ("utf32", "utf32_turkish_ci", False),  # 169
+    ("utf32", "utf32_czech_ci", False),  # 170
+    ("utf32", "utf32_danish_ci", False),  # 171
+    ("utf32", "utf32_lithuanian_ci", False),  # 172
+    ("utf32", "utf32_slovak_ci", False),  # 173
+    ("utf32", "utf32_spanish2_ci", False),  # 174
+    ("utf32", "utf32_roman_ci", False),  # 175
+    ("utf32", "utf32_persian_ci", False),  # 176
+    ("utf32", "utf32_esperanto_ci", False),  # 177
+    ("utf32", "utf32_hungarian_ci", False),  # 178
+    ("utf32", "utf32_sinhala_ci", False),  # 179
+    ("utf32", "utf32_german2_ci", False),  # 180
+    ("utf32", "utf32_croatian_ci", False),  # 181
+    ("utf32", "utf32_unicode_520_ci", False),  # 182
+    ("utf32", "utf32_vietnamese_ci", False),  # 183
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    ("utf8", "utf8_unicode_ci", False),  # 192
+    ("utf8", "utf8_icelandic_ci", False),  # 193
+    ("utf8", "utf8_latvian_ci", False),  # 194
+    ("utf8", "utf8_romanian_ci", False),  # 195
+    ("utf8", "utf8_slovenian_ci", False),  # 196
+    ("utf8", "utf8_polish_ci", False),  # 197
+    ("utf8", "utf8_estonian_ci", False),  # 198
+    ("utf8", "utf8_spanish_ci", False),  # 199
+    ("utf8", "utf8_swedish_ci", False),  # 200
+    ("utf8", "utf8_turkish_ci", False),  # 201
+    ("utf8", "utf8_czech_ci", False),  # 202
+    ("utf8", "utf8_danish_ci", False),  # 203
+    ("utf8", "utf8_lithuanian_ci", False),  # 204
+    ("utf8", "utf8_slovak_ci", False),  # 205
+    ("utf8", "utf8_spanish2_ci", False),  # 206
+    ("utf8", "utf8_roman_ci", False),  # 207
+    ("utf8", "utf8_persian_ci", False),  # 208
+    ("utf8", "utf8_esperanto_ci", False),  # 209
+    ("utf8", "utf8_hungarian_ci", False),  # 210
+    ("utf8", "utf8_sinhala_ci", False),  # 211
+    ("utf8", "utf8_german2_ci", False),  # 212
+    ("utf8", "utf8_croatian_ci", False),  # 213
+    ("utf8", "utf8_unicode_520_ci", False),  # 214
+    ("utf8", "utf8_vietnamese_ci", False),  # 215
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    None,
+    ("utf8", "utf8_general_mysql500_ci", False),  # 223
+    ("utf8mb4", "utf8mb4_unicode_ci", False),  # 224
+    ("utf8mb4", "utf8mb4_icelandic_ci", False),  # 225
+    ("utf8mb4", "utf8mb4_latvian_ci", False),  # 226
+    ("utf8mb4", "utf8mb4_romanian_ci", False),  # 227
+    ("utf8mb4", "utf8mb4_slovenian_ci", False),  # 228
+    ("utf8mb4", "utf8mb4_polish_ci", False),  # 229
+    ("utf8mb4", "utf8mb4_estonian_ci", False),  # 230
+    ("utf8mb4", "utf8mb4_spanish_ci", False),  # 231
+    ("utf8mb4", "utf8mb4_swedish_ci", False),  # 232
+    ("utf8mb4", "utf8mb4_turkish_ci", False),  # 233
+    ("utf8mb4", "utf8mb4_czech_ci", False),  # 234
+    ("utf8mb4", "utf8mb4_danish_ci", False),  # 235
+    ("utf8mb4", "utf8mb4_lithuanian_ci", False),  # 236
+    ("utf8mb4", "utf8mb4_slovak_ci", False),  # 237
+    ("utf8mb4", "utf8mb4_spanish2_ci", False),  # 238
+    ("utf8mb4", "utf8mb4_roman_ci", False),  # 239
+    ("utf8mb4", "utf8mb4_persian_ci", False),  # 240
+    ("utf8mb4", "utf8mb4_esperanto_ci", False),  # 241
+    ("utf8mb4", "utf8mb4_hungarian_ci", False),  # 242
+    ("utf8mb4", "utf8mb4_sinhala_ci", False),  # 243
+    ("utf8mb4", "utf8mb4_german2_ci", False),  # 244
+    ("utf8mb4", "utf8mb4_croatian_ci", False),  # 245
+    ("utf8mb4", "utf8mb4_unicode_520_ci", False),  # 246
+    ("utf8mb4", "utf8mb4_vietnamese_ci", False),  # 247
+    ("gb18030", "gb18030_chinese_ci", True),  # 248
+    ("gb18030", "gb18030_bin", False),  # 249
+    ("gb18030", "gb18030_unicode_520_ci", False),  # 250
+    None,
+    None,
+    None,
+    None,
+    ("utf8mb4", "utf8mb4_0900_ai_ci", True),  # 255
+    ("utf8mb4", "utf8mb4_de_pb_0900_ai_ci", False),  # 256
+    ("utf8mb4", "utf8mb4_is_0900_ai_ci", False),  # 257
+    ("utf8mb4", "utf8mb4_lv_0900_ai_ci", False),  # 258
+    ("utf8mb4", "utf8mb4_ro_0900_ai_ci", False),  # 259
+    ("utf8mb4", "utf8mb4_sl_0900_ai_ci", False),  # 260
+    ("utf8mb4", "utf8mb4_pl_0900_ai_ci", False),  # 261
+    ("utf8mb4", "utf8mb4_et_0900_ai_ci", False),  # 262
+    ("utf8mb4", "utf8mb4_es_0900_ai_ci", False),  # 263
+    ("utf8mb4", "utf8mb4_sv_0900_ai_ci", False),  # 264
+    ("utf8mb4", "utf8mb4_tr_0900_ai_ci", False),  # 265
+    ("utf8mb4", "utf8mb4_cs_0900_ai_ci", False),  # 266
+    ("utf8mb4", "utf8mb4_da_0900_ai_ci", False),  # 267
+    ("utf8mb4", "utf8mb4_lt_0900_ai_ci", False),  # 268
+    ("utf8mb4", "utf8mb4_sk_0900_ai_ci", False),  # 269
+    ("utf8mb4", "utf8mb4_es_trad_0900_ai_ci", False),  # 270
+    ("utf8mb4", "utf8mb4_la_0900_ai_ci", False),  # 271
+    None,
+    ("utf8mb4", "utf8mb4_eo_0900_ai_ci", False),  # 273
+    ("utf8mb4", "utf8mb4_hu_0900_ai_ci", False),  # 274
+    ("utf8mb4", "utf8mb4_hr_0900_ai_ci", False),  # 275
+    None,
+    ("utf8mb4", "utf8mb4_vi_0900_ai_ci", False),  # 277
+    ("utf8mb4", "utf8mb4_0900_as_cs", False),  # 278
+    ("utf8mb4", "utf8mb4_de_pb_0900_as_cs", False),  # 279
+    ("utf8mb4", "utf8mb4_is_0900_as_cs", False),  # 280
+    ("utf8mb4", "utf8mb4_lv_0900_as_cs", False),  # 281
+    ("utf8mb4", "utf8mb4_ro_0900_as_cs", False),  # 282
+    ("utf8mb4", "utf8mb4_sl_0900_as_cs", False),  # 283
+    ("utf8mb4", "utf8mb4_pl_0900_as_cs", False),  # 284
+    ("utf8mb4", "utf8mb4_et_0900_as_cs", False),  # 285
+    ("utf8mb4", "utf8mb4_es_0900_as_cs", False),  # 286
+    ("utf8mb4", "utf8mb4_sv_0900_as_cs", False),  # 287
+    ("utf8mb4", "utf8mb4_tr_0900_as_cs", False),  # 288
+    ("utf8mb4", "utf8mb4_cs_0900_as_cs", False),  # 289
+    ("utf8mb4", "utf8mb4_da_0900_as_cs", False),  # 290
+    ("utf8mb4", "utf8mb4_lt_0900_as_cs", False),  # 291
+    ("utf8mb4", "utf8mb4_sk_0900_as_cs", False),  # 292
+    ("utf8mb4", "utf8mb4_es_trad_0900_as_cs", False),  # 293
+    ("utf8mb4", "utf8mb4_la_0900_as_cs", False),  # 294
+    None,
+    ("utf8mb4", "utf8mb4_eo_0900_as_cs", False),  # 296
+    ("utf8mb4", "utf8mb4_hu_0900_as_cs", False),  # 297
+    ("utf8mb4", "utf8mb4_hr_0900_as_cs", False),  # 298
+    None,
+    ("utf8mb4", "utf8mb4_vi_0900_as_cs", False),  # 300
+    None,
+    None,
+    ("utf8mb4", "utf8mb4_ja_0900_as_cs", False),  # 303
+    ("utf8mb4", "utf8mb4_ja_0900_as_cs_ks", False),  # 304
+    ("utf8mb4", "utf8mb4_0900_as_ci", False),  # 305
+    ("utf8mb4", "utf8mb4_ru_0900_ai_ci", False),  # 306
+    ("utf8mb4", "utf8mb4_ru_0900_as_cs", False),  # 307
+    ("utf8mb4", "utf8mb4_zh_0900_as_cs", False),  # 308
+    ("utf8mb4", "utf8mb4_0900_bin", False),  # 309
+]
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/compat.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/compat.py
new file mode 100644
index 0000000..1913e66
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/compat.py
@@ -0,0 +1,86 @@
+# Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""This module handles compatibility issues between Python 2 and Python 3."""
+
+import sys
+import decimal
+import binascii
+
+
+PY3 = sys.version_info[0] == 3
+
+
+# pylint: disable=E0401,E0602,E0611,W0611,
+if PY3:
+    import queue
+    try:
+        from json.decoder import JSONDecodeError
+    except ImportError:
+        JSONDecodeError = ValueError
+    from urllib.parse import urlparse, unquote, parse_qsl
+
+    def hexlify(data):
+        """Return the hexadecimal representation of the binary data.
+
+        Args:
+            data (str): The binary data.
+
+        Returns:
+            bytes: The hexadecimal representation of data.
+        """
+        return binascii.hexlify(data).decode("utf-8")
+
+    NUMERIC_TYPES = (int, float, decimal.Decimal,)
+    INT_TYPES = (int,)
+    UNICODE_TYPES = (str,)
+    STRING_TYPES = (str,)
+    BYTE_TYPES = (bytearray, bytes,)
+    MAX_INT = sys.maxsize
+else:
+    import Queue as queue
+    from urlparse import urlparse, unquote, parse_qsl
+
+    def hexlify(data):
+        """Return the hexadecimal representation of the binary data.
+
+        Args:
+            data (str): The binary data.
+
+        Returns:
+            bytes: The hexadecimal representation of data.
+        """
+        return data.encode("hex")
+
+    NUMERIC_TYPES = (int, float, decimal.Decimal, long,)
+    INT_TYPES = (int, long,)
+    UNICODE_TYPES = (unicode,)
+    STRING_TYPES = (str, unicode,)
+    BYTE_TYPES = (bytearray,)
+    MAX_INT = sys.maxint  # pylint: disable=E1101
+    JSONDecodeError = ValueError
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/connection.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/connection.py
new file mode 100644
index 0000000..adcdac2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/connection.py
@@ -0,0 +1,2268 @@
+# Copyright (c) 2016, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementation of communication for MySQL X servers."""
+
+try:
+    import ssl
+    SSL_AVAILABLE = True
+    TLS_VERSIONS = {
+        "TLSv1": ssl.PROTOCOL_TLSv1,
+        "TLSv1.1": ssl.PROTOCOL_TLSv1_1,
+        "TLSv1.2": ssl.PROTOCOL_TLSv1_2}
+    # TLSv1.3 included in PROTOCOL_TLS, but PROTOCOL_TLS is not included on 3.4
+    if hasattr(ssl, "PROTOCOL_TLS"):
+        TLS_VERSIONS["TLSv1.3"] = ssl.PROTOCOL_TLS  # pylint: disable=E1101
+    else:
+        TLS_VERSIONS["TLSv1.3"] = ssl.PROTOCOL_SSLv23  # Alias of PROTOCOL_TLS
+    if hasattr(ssl, "HAS_TLSv1_3") and ssl.HAS_TLSv1_3:
+        TLS_V1_3_SUPPORTED = True
+    else:
+        TLS_V1_3_SUPPORTED = False
+except:
+    SSL_AVAILABLE = False
+    TLS_V1_3_SUPPORTED = False
+
+import sys
+import socket
+import logging
+import uuid
+import platform
+import os
+import random
+import re
+import threading
+
+try:
+    import dns.resolver
+    import dns.exception
+except ImportError:
+    HAVE_DNSPYTHON = False
+else:
+    HAVE_DNSPYTHON = True
+
+from datetime import datetime, timedelta
+from functools import wraps
+
+from .authentication import (MySQL41AuthPlugin, PlainAuthPlugin,
+                             Sha256MemoryAuthPlugin)
+# pylint: disable=W0622
+from .errors import (InterfaceError, NotSupportedError, OperationalError,
+                     PoolError, ProgrammingError, TimeoutError)
+from .compat import PY3, STRING_TYPES, UNICODE_TYPES, queue
+from .crud import Schema
+from .constants import SSLMode, Auth, COMPRESSION_ALGORITHMS
+from .helpers import escape, get_item_or_attr, iani_to_openssl_cs_name
+from .protocol import (Protocol, MessageReader, MessageWriter, HAVE_LZ4,
+                       HAVE_ZSTD)
+from .result import Result, RowResult, SqlResult, DocResult
+from .statement import SqlStatement, AddStatement, quote_identifier
+from .protobuf import Protobuf
+
+# pylint: disable=C0411,C0413
+sys.path.append("..")
+from mysql.connector.utils import linux_distribution
+from mysql.connector.version import VERSION, LICENSE
+
+
+_CONNECT_TIMEOUT = 10000  # Default connect timeout in milliseconds
+_DROP_DATABASE_QUERY = "DROP DATABASE IF EXISTS {0}"
+_CREATE_DATABASE_QUERY = "CREATE DATABASE IF NOT EXISTS {0}"
+_SELECT_SCHEMA_NAME_QUERY = ("SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA."
+                             "SCHEMATA WHERE SCHEMA_NAME = '{}'")
+_SHOW_VERSION_QUERY = 'SHOW VARIABLES LIKE "VERSION"'
+
+_CNX_POOL_MAXSIZE = 99
+_CNX_POOL_MAX_NAME_SIZE = 120
+_CNX_POOL_NAME_REGEX = re.compile(r'[^a-zA-Z0-9._:\-*$#]')
+_CNX_POOL_MAX_IDLE_TIME = 2147483
+_CNX_POOL_QUEUE_TIMEOUT = 2147483
+
+# Time is on seconds
+_PENALTY_SERVER_OFFLINE = 1000000
+_PENALTY_MAXED_OUT = 60
+_PENALTY_NO_ADD_INFO = 60 * 60
+_PENALTY_CONN_TIMEOUT = 60 * 60
+_PENALTY_WRONG_PASSW = 60 * 60 * 24
+_TIMEOUT_PENALTIES = {
+    # Server denays service e.g Max connections reached
+    "[WinError 10053]": _PENALTY_MAXED_OUT, # Established connection was aborted
+    "[Errno 32]": _PENALTY_MAXED_OUT, # Broken pipe
+    # Server is Offline
+    "[WinError 10061]": _PENALTY_SERVER_OFFLINE, # Target machine actively refused it
+    "[Errno 111]": _PENALTY_SERVER_OFFLINE, # Connection refused
+    # Host is offline:
+    "[WinError 10060]": _PENALTY_CONN_TIMEOUT, # Not respond after a period of time
+    # No route to Host:
+    "[Errno 11001]": _PENALTY_NO_ADD_INFO,# getaddrinfo failed
+    "[Errno -2]": _PENALTY_NO_ADD_INFO, # Name or service not known
+    # Wrong Password
+    "Access denied": _PENALTY_WRONG_PASSW
+}
+
+_LOGGER = logging.getLogger("mysqlx")
+
+
+def generate_pool_name(**kwargs):
+    """Generate a pool name.
+
+    This function takes keyword arguments, usually the connection arguments and
+    tries to generate a name for the pool.
+
+    Args:
+        **kwargs: Arbitrary keyword arguments with the connection arguments.
+
+    Raises:
+        PoolError: If the name can't be generated.
+
+    Returns:
+        str: The generated pool name.
+    """
+    parts = []
+    for key in ("host", "port", "user", "database", "client_id"):
+        try:
+            parts.append(str(kwargs[key]))
+        except KeyError:
+            pass
+
+    if not parts:
+        raise PoolError("Failed generating pool name; specify pool_name")
+
+    return "_".join(parts)
+
+
+class SocketStream(object):
+    """Implements a socket stream."""
+    def __init__(self):
+        self._socket = None
+        self._is_ssl = False
+        self._is_socket = False
+        self._host = None
+
+    def connect(self, params, connect_timeout=_CONNECT_TIMEOUT):
+        """Connects to a TCP service.
+
+        Args:
+            params (tuple): The connection parameters.
+
+        Raises:
+            :class:`mysqlx.InterfaceError`: If Unix socket is not supported.
+        """
+        if connect_timeout is not None:
+            connect_timeout = connect_timeout / 1000  # Convert to seconds
+        try:
+            self._socket = socket.create_connection(params, connect_timeout)
+            self._host = params[0]
+        except ValueError:
+            try:
+                self._socket = socket.socket(socket.AF_UNIX)
+                self._socket.settimeout(connect_timeout)
+                self._socket.connect(params)
+                self._is_socket = True
+            except AttributeError:
+                raise InterfaceError("Unix socket unsupported")
+        self._socket.settimeout(None)
+
+    def read(self, count):
+        """Receive data from the socket.
+
+        Args:
+            count (int): Buffer size.
+
+        Returns:
+            bytes: The data received.
+        """
+        if self._socket is None:
+            raise OperationalError("MySQLx Connection not available")
+        buf = []
+        while count > 0:
+            data = self._socket.recv(count)
+            if data == b"":
+                raise RuntimeError("Unexpected connection close")
+            buf.append(data)
+            count -= len(data)
+        return b"".join(buf)
+
+    def sendall(self, data):
+        """Send data to the socket.
+
+        Args:
+            data (bytes): The data to be sent.
+        """
+        if self._socket is None:
+            raise OperationalError("MySQLx Connection not available")
+        try:
+            self._socket.sendall(data)
+        except socket.error as err:
+            raise OperationalError("Unexpected socket error: {}".format(err))
+
+    def close(self):
+        """Close the socket."""
+        if not self._socket:
+            return
+        try:
+            self._socket.shutdown(socket.SHUT_RDWR)
+            self._socket.close()
+        except socket.error:
+            # On [Errno 107] Transport endpoint is not connected
+            pass
+        self._socket = None
+
+    def __del__(self):
+        self.close()
+
+    def set_ssl(self, ssl_protos, ssl_mode, ssl_ca, ssl_crl, ssl_cert, ssl_key,
+                ssl_ciphers):
+        """Set SSL parameters.
+
+        Args:
+            ssl_protos (list): SSL protocol to use.
+            ssl_mode (str): SSL mode.
+            ssl_ca (str): The certification authority certificate.
+            ssl_crl (str): The certification revocation lists.
+            ssl_cert (str): The certificate.
+            ssl_key (str): The certificate key.
+            ssl_ciphers (list): SSL ciphersuites to use.
+
+        Raises:
+            :class:`mysqlx.RuntimeError`: If Python installation has no SSL
+                                          support.
+            :class:`mysqlx.InterfaceError`: If the parameters are invalid.
+        """
+        if not SSL_AVAILABLE:
+            self.close()
+            raise RuntimeError("Python installation has no SSL support")
+
+        if ssl_protos is None or not ssl_protos:
+            context = ssl.create_default_context()
+            if ssl_mode != SSLMode.VERIFY_IDENTITY:
+                context.check_hostname = False
+            if ssl_mode == SSLMode.REQUIRED:
+                context.verify_mode = ssl.CERT_NONE
+        else:
+            ssl_protos.sort(reverse=True)
+            tls_version = ssl_protos[0]
+            if not TLS_V1_3_SUPPORTED and \
+               tls_version == "TLSv1.3" and len(ssl_protos) > 1:
+                tls_version = ssl_protos[1]
+            ssl_protocol = TLS_VERSIONS[tls_version]
+            context = ssl.SSLContext(ssl_protocol)
+
+            if tls_version == "TLSv1.3":
+                if "TLSv1.2" not in ssl_protos:
+                    context.options |= ssl.OP_NO_TLSv1_2
+                if "TLSv1.1" not in ssl_protos:
+                    context.options |= ssl.OP_NO_TLSv1_1
+                if "TLSv1" not in ssl_protos:
+                    context.options |= ssl.OP_NO_TLSv1
+
+        if ssl_ca:
+            try:
+                context.load_verify_locations(ssl_ca)
+                context.verify_mode = ssl.CERT_REQUIRED
+            except (IOError, ssl.SSLError) as err:
+                self.close()
+                raise InterfaceError("Invalid CA Certificate: {}".format(err))
+
+        if ssl_crl:
+            try:
+                context.load_verify_locations(ssl_crl)
+                context.verify_flags = ssl.VERIFY_CRL_CHECK_LEAF
+            except (IOError, ssl.SSLError) as err:
+                self.close()
+                raise InterfaceError("Invalid CRL: {}".format(err))
+
+        if ssl_cert:
+            try:
+                context.load_cert_chain(ssl_cert, ssl_key)
+            except (IOError, ssl.SSLError) as err:
+                self.close()
+                raise InterfaceError("Invalid Certificate/Key: {}".format(err))
+
+        if ssl_ciphers:
+            context.set_ciphers(":".join(iani_to_openssl_cs_name(ssl_protos[0],
+                                                                 ssl_ciphers)))
+        try:
+            self._socket = context.wrap_socket(self._socket,
+                                               server_hostname=self._host)
+        except ssl.CertificateError as err:
+            raise InterfaceError(str(err))
+        if ssl_mode == SSLMode.VERIFY_IDENTITY:
+            context.check_hostname = True
+            hostnames = []
+            # Windows does not return loopback aliases on gethostbyaddr
+            if os.name == 'nt' and (self._host == 'localhost' or \
+               self._host == '127.0.0.1'):
+                hostnames = ['localhost', '127.0.0.1']
+            aliases = socket.gethostbyaddr(self._host)
+            hostnames.extend([aliases[0]] + aliases[1])
+            match_found = False
+            errs = []
+            for hostname in hostnames:
+                try:
+                    ssl.match_hostname(self._socket.getpeercert(), hostname)
+                except ssl.CertificateError as err:
+                    errs.append(str(err))
+                else:
+                    match_found = True
+                    break
+            if not match_found:
+                self.close()
+                raise InterfaceError("Unable to verify server identity: {}"
+                                     "".format(", ".join(errs)))
+
+        self._is_ssl = True
+
+    def is_ssl(self):
+        """Verifies if SSL is being used.
+
+        Returns:
+            bool: Returns `True` if SSL is being used.
+        """
+        return self._is_ssl
+
+    def is_socket(self):
+        """Verifies if socket connection is being used.
+
+        Returns:
+            bool: Returns `True` if socket connection is being used.
+        """
+        return self._is_socket
+
+    def is_secure(self):
+        """Verifies if connection is secure.
+
+        Returns:
+            bool: Returns `True` if connection is secure.
+        """
+        return self._is_ssl or self._is_socket
+
+    def is_open(self):
+        """Verifies if connection is open.
+
+        Returns:
+            bool: Returns `True` if connection is open.
+        """
+        return self._socket is not None
+
+
+def catch_network_exception(func):
+    """Decorator used to catch socket.error or RuntimeError.
+
+    Raises:
+        :class:`mysqlx.InterfaceError`: If `socket.Error` or `RuntimeError`
+                                        is raised.
+    """
+    @wraps(func)
+    def wrapper(self, *args, **kwargs):
+        """Wrapper function."""
+        try:
+            return func(self, *args, **kwargs)
+        except (socket.error, RuntimeError):
+            self.disconnect()
+            raise InterfaceError("Cannot connect to host")
+    return wrapper
+
+
+class Router(dict):
+    """Represents a set of connection parameters.
+
+    Args:
+       settings (dict): Dictionary with connection settings
+    .. versionadded:: 8.0.20
+    """
+    def __init__(self, connection_params):
+        self.update(connection_params)
+        self["available"] = self.get("available", True)
+
+    def available(self):
+        """Verifies if the Router is available to open connections.
+
+        Returns:
+            bool: True if this Router is available else False.
+        """
+        return self["available"]
+
+    def set_unavailable(self):
+        """Sets this Router unavailable to open connections.
+        """
+        self["available"] = False
+
+    def get_connection_params(self):
+        """Verifies if the Router is available to open connections.
+
+        Returns:
+            tuple: host and port or socket information tuple.
+        """
+        if "socket" in self:
+            return self["socket"]
+        return (self["host"], self["port"])
+
+
+class RouterManager():
+    """Manages the connection parameters of all the routers.
+
+    Args:
+        Routers (list): A list of Router objects.
+        settings (dict): Dictionary with connection settings.
+    .. versionadded:: 8.0.20
+    """
+    def __init__(self, routers, settings):
+        self._routers = routers
+        self._settings = settings
+        self._cur_priority_idx = 0
+        self._can_failover = True
+        # Reuters status
+        self._routers_directory = {}
+        self.routers_priority_list = []
+        self._ensure_priorities()
+
+    def _ensure_priorities(self):
+        """Ensure priorities.
+
+        Raises:
+            :class:`mysqlx.ProgrammingError`: If priorities are invalid.
+        """
+        priority_count = 0
+
+        for router in self._routers:
+            priority = router.get("priority", None)
+            if priority is None:
+                priority_count += 1
+                router["priority"] = 100
+            elif priority > 100:
+                raise ProgrammingError("The priorities must be between 0 and "
+                                       "100", 4007)
+
+        if 0 < priority_count < len(self._routers):
+            raise ProgrammingError("You must either assign no priority to any "
+                                   "of the routers or give a priority for "
+                                   "every router", 4000)
+
+        self._routers.sort(key=lambda x: x["priority"], reverse=True)
+
+        # Group servers with the same priority
+        for router in self._routers:
+            priority = router["priority"]
+            if priority not in self._routers_directory.keys():
+                self._routers_directory[priority] = [Router(router)]
+                self.routers_priority_list.append(priority)
+            else:
+                self._routers_directory[priority].append(Router(router))
+
+    def _get_available_routers(self, priority):
+        """Get a list of the current available routers that shares the given priority.
+
+        Returns:
+            list: A list of the current available routers.
+        """
+        router_list = self._routers_directory[priority]
+        router_list = [router for router in router_list if router.available()]
+        return router_list
+
+    def _get_random_connection_params(self, priority):
+        """Get a random router from the group with the given priority.
+
+        Returns:
+            Router: A random router.
+        """
+        router_list = self._get_available_routers(priority)
+        if not router_list:
+            return None
+        if len(router_list) == 1:
+            return router_list[0]
+
+        last = len(router_list) - 1
+        index = random.randint(0, last)
+        return router_list[index]
+
+    def can_failover(self):
+        """Returns the next connection parameters.
+
+        Returns:
+            bool: True if there is more server to failover to else False.
+        """
+        return self._can_failover
+
+    def get_next_router(self):
+        """Returns the next connection parameters.
+
+        Returns:
+            Router: with the connection parameters.
+        """
+        if not self._routers:
+            self._can_failover = False
+            router_settings = self._settings.copy()
+            router_settings["host"] = self._settings.get("host", "localhost")
+            router_settings["port"] = self._settings.get("port", 33060)
+            return Router(router_settings)
+
+        cur_priority = self.routers_priority_list[self._cur_priority_idx]
+        routers_priority_len = len(self.routers_priority_list)
+
+        search = True
+        while search:
+            router = self._get_random_connection_params(cur_priority)
+
+            if router is not None or \
+               self._cur_priority_idx >= routers_priority_len:
+                if self._cur_priority_idx == routers_priority_len -1 and \
+                    len(self._get_available_routers(cur_priority)) < 2:
+                    self._can_failover = False
+                break
+
+            # Search on next group
+            self._cur_priority_idx += 1
+            if self._cur_priority_idx < routers_priority_len:
+                cur_priority = self.routers_priority_list[self._cur_priority_idx]
+
+        return router
+
+    def get_routers_directory(self):
+        """Returns the directory containing all the routers managed.
+
+        Returns:
+            dict: Dictionary with priorities as connection settings.
+        """
+        return self._routers_directory
+
+
+class Connection(object):
+    """Connection to a MySQL Server.
+
+    Args:
+        settings (dict): Dictionary with connection settings.
+    """
+    def __init__(self, settings):
+        self.settings = settings
+        self.stream = SocketStream()
+        self.protocol = None
+        self.keep_open = None
+        self._user = settings.get("user")
+        self._password = settings.get("password")
+        self._schema = settings.get("schema")
+        self._active_result = None
+        self._routers = settings.get("routers", [])
+
+        if "host" in settings and settings["host"]:
+            self._routers.append({
+                "host": settings.get("host"),
+                "port": settings.get("port", None)
+            })
+
+        self.router_manager = RouterManager(self._routers, settings)
+        self._connect_timeout = settings.get("connect-timeout",
+                                             _CONNECT_TIMEOUT)
+        if self._connect_timeout == 0:
+            # None is assigned if connect timeout is 0, which disables timeouts
+            # on socket operations
+            self._connect_timeout = None
+
+        self._stmt_counter = 0
+        self._prepared_stmt_ids = []
+        self._prepared_stmt_supported = True
+
+    def fetch_active_result(self):
+        """Fetch active result."""
+        if self._active_result is not None:
+            self._active_result.fetch_all()
+            self._active_result = None
+
+    def set_active_result(self, result):
+        """Set active result.
+
+        Args:
+            `Result`: It can be :class:`mysqlx.Result`,
+                      :class:`mysqlx.BufferingResult`,
+                      :class:`mysqlx.RowResult`, :class:`mysqlx.SqlResult` or
+                      :class:`mysqlx.DocResult`.
+        """
+        self._active_result = result
+
+    def connect(self):
+        """Attempt to connect to the MySQL server.
+
+        Raises:
+            :class:`mysqlx.InterfaceError`: If fails to connect to the MySQL
+                                            server.
+            :class:`mysqlx.TimeoutError`: If connect timeout was exceeded.
+        """
+        # Loop and check
+        error = None
+        while self.router_manager.can_failover():
+            try:
+                router = self.router_manager.get_next_router()
+                self.stream.connect(router.get_connection_params(),
+                                    self._connect_timeout)
+                reader = MessageReader(self.stream)
+                writer = MessageWriter(self.stream)
+                self.protocol = Protocol(reader, writer)
+
+                caps_data = self.protocol.get_capabilites().capabilities
+                caps = {
+                    get_item_or_attr(cap, "name").lower():
+                        cap for cap in caps_data
+                } if caps_data else {}
+
+                # Set TLS capabilities
+                self._set_tls_capabilities(caps)
+
+                # Set connection attributes capabilities
+                if "attributes" in self.settings:
+                    conn_attrs = self.settings["attributes"]
+                    self.protocol.set_capabilities(
+                        session_connect_attrs=conn_attrs)
+
+                # Set compression capabilities
+                compression = self.settings.get("compression", "preferred")
+                algorithms = self.settings.get("compression-algorithms")
+                algorithm = None if compression == "disabled" \
+                    else self._set_compression_capabilities(caps,
+                                                            compression,
+                                                            algorithms)
+                self._authenticate()
+                self.protocol.set_compression(algorithm)
+                return
+            except (socket.error, RuntimeError) as err:
+                error = err
+                router.set_unavailable()
+
+        # Python 2.7 does not raise a socket.timeout exception when using
+        # settimeout(), but it raises a socket.error with errno.EAGAIN (11)
+        # or errno.EINPROGRESS (115) if connect-timeout value is too low
+        if error is not None and \
+           (isinstance(error, socket.timeout) or
+            (hasattr(error, "errno") and error.errno in (11, 115) and not PY3)):
+            if len(self._routers) <= 1:
+                raise TimeoutError("Connection attempt to the server was "
+                                   "aborted. Timeout of {0} ms was exceeded"
+                                   "".format(self._connect_timeout))
+            raise TimeoutError("All server connection attempts were aborted. "
+                               "Timeout of {0} ms was exceeded for each "
+                               "selected server".format(self._connect_timeout))
+        if len(self._routers) <= 1:
+            raise InterfaceError("Cannot connect to host: {0}".format(error))
+        raise InterfaceError("Unable to connect to any of the target hosts",
+                             4001)
+
+    def _set_tls_capabilities(self, caps):
+        """Set the TLS capabilities.
+
+        Args:
+            caps (dict): Dictionary with the server capabilities.
+
+        Raises:
+            :class:`mysqlx.OperationalError`: If SSL is not enabled at the
+                                             server.
+            :class:`mysqlx.RuntimeError`: If support for SSL is not available
+                                          in Python.
+
+        .. versionadded:: 8.0.21
+        """
+        if self.settings.get("ssl-mode") == SSLMode.DISABLED:
+            return
+
+        if self.stream.is_socket():
+            if self.settings.get("ssl-mode"):
+                _LOGGER.warning("SSL not required when using Unix socket.")
+            return
+
+        if "tls" not in caps:
+            self.close_connection()
+            raise OperationalError("SSL not enabled at server")
+
+        is_ol7 = False
+        if platform.system() == "Linux":
+            distname, version, _ = linux_distribution()
+            try:
+                is_ol7 = "Oracle Linux" in distname and \
+                    version.split(".")[0] == "7"
+            except IndexError:
+                is_ol7 = False
+
+        if sys.version_info < (2, 7, 9) and not is_ol7:
+            self.close_connection()
+            raise RuntimeError("The support for SSL is not available for "
+                               "this Python version")
+
+        self.protocol.set_capabilities(tls=True)
+        self.stream.set_ssl(self.settings.get("tls-versions", None),
+                            self.settings.get("ssl-mode", SSLMode.REQUIRED),
+                            self.settings.get("ssl-ca"),
+                            self.settings.get("ssl-crl"),
+                            self.settings.get("ssl-cert"),
+                            self.settings.get("ssl-key"),
+                            self.settings.get("tls-ciphersuites"))
+        if "attributes" in self.settings:
+            conn_attrs = self.settings["attributes"]
+            self.protocol.set_capabilities(session_connect_attrs=conn_attrs)
+
+    def _set_compression_capabilities(self, caps, compression,
+                                      algorithms=None):
+        """Set the compression capabilities.
+
+        If compression is available, negociates client and server algorithms.
+        By trying to find an algorithm from the requested compression
+        algorithms list, which is supported by the server.
+
+        If no compression algorithms list is provided, the following priority
+        is used:
+
+        1) zstd_stream
+        2) lz4_message
+        3) deflate_stream
+
+        Args:
+            caps (dict): Dictionary with the server capabilities.
+            compression (str): The compression connection setting.
+            algorithms (list): List of requested compression algorithms.
+
+        Returns:
+            str: The compression algorithm.
+
+        .. versionadded:: 8.0.21
+        .. versionchanged:: 8.0.22
+        """
+        compression_data = caps.get("compression")
+        if compression_data is None:
+            msg = "Compression requested but the server does not support it"
+            if compression == "required":
+                raise NotSupportedError(msg)
+            _LOGGER.warning(msg)
+            return None
+
+        compression_dict = {}
+        if isinstance(compression_data, dict):  # C extension is being used
+            for fld in compression_data["value"]["obj"]["fld"]:
+                compression_dict[fld["key"]] = [
+                    value["scalar"]["v_string"]["value"].decode("utf-8")
+                    for value in fld["value"]["array"]["value"]
+                ]
+        else:
+            for fld in compression_data.value.obj.fld:
+                compression_dict[fld.key] = [
+                    value.scalar.v_string.value.decode("utf-8")
+                    for value in fld.value.array.value
+                ]
+
+        server_algorithms = compression_dict.get("algorithm", [])
+        algorithm = None
+
+        # Try to find an algorithm from the requested compression algorithms
+        # list, which is supported by the server
+        if algorithms:
+            # Resolve compression algorithms aliases and ignore unsupported
+            client_algorithms = [
+                COMPRESSION_ALGORITHMS[item] for item in algorithms
+                if item in COMPRESSION_ALGORITHMS
+            ]
+            matched = [
+                item for item in client_algorithms
+                if item in server_algorithms
+            ]
+            if matched:
+                algorithm = COMPRESSION_ALGORITHMS.get(matched[0])
+            elif compression == "required":
+                raise InterfaceError("The connection compression is set as "
+                                     "required, but none of the provided "
+                                     "compression algorithms are supported.")
+            else:
+                return None  # Disable compression
+
+        # No compression algorithms list was provided or couldn't found one
+        # supported by the server
+        if algorithm is None:
+            if HAVE_ZSTD and "zstd_stream" in server_algorithms:
+                algorithm = "zstd_stream"
+            elif HAVE_LZ4 and "lz4_message" in server_algorithms:
+                algorithm = "lz4_message"
+            else:
+                algorithm = "deflate_stream"
+
+        if algorithm not in server_algorithms:
+            msg = ("Compression requested but the compression algorithm "
+                   "negotiation failed")
+            if compression == "required":
+                raise InterfaceError(msg)
+            _LOGGER.warning(msg)
+            return None
+
+        self.protocol.set_capabilities(compression={"algorithm": algorithm})
+        return algorithm
+
+    def _authenticate(self):
+        """Authenticate with the MySQL server."""
+        auth = self.settings.get("auth")
+        if auth:
+            if auth == Auth.PLAIN:
+                self._authenticate_plain()
+            elif auth == Auth.SHA256_MEMORY:
+                self._authenticate_sha256_memory()
+            elif auth == Auth.MYSQL41:
+                self._authenticate_mysql41()
+        elif self.stream.is_secure():
+            # Use PLAIN if no auth provided and connection is secure
+            self._authenticate_plain()
+        else:
+            # Use MYSQL41 if connection is not secure
+            try:
+                self._authenticate_mysql41()
+            except InterfaceError:
+                pass
+            else:
+                return
+            # Try SHA256_MEMORY if MYSQL41 fails
+            try:
+                self._authenticate_sha256_memory()
+            except InterfaceError:
+                raise InterfaceError("Authentication failed using MYSQL41 and "
+                                     "SHA256_MEMORY, check username and "
+                                     "password or try a secure connection")
+
+    def _authenticate_mysql41(self):
+        """Authenticate with the MySQL server using `MySQL41AuthPlugin`."""
+        plugin = MySQL41AuthPlugin(self._user, self._password)
+        self.protocol.send_auth_start(plugin.auth_name())
+        extra_data = self.protocol.read_auth_continue()
+        self.protocol.send_auth_continue(plugin.auth_data(extra_data))
+        self.protocol.read_auth_ok()
+
+    def _authenticate_plain(self):
+        """Authenticate with the MySQL server using `PlainAuthPlugin`."""
+        if not self.stream.is_secure():
+            raise InterfaceError("PLAIN authentication is not allowed via "
+                                 "unencrypted connection")
+        plugin = PlainAuthPlugin(self._user, self._password)
+        self.protocol.send_auth_start(plugin.auth_name(),
+                                      auth_data=plugin.auth_data())
+        self.protocol.read_auth_ok()
+
+    def _authenticate_sha256_memory(self):
+        """Authenticate with the MySQL server using `Sha256MemoryAuthPlugin`."""
+        plugin = Sha256MemoryAuthPlugin(self._user, self._password)
+        self.protocol.send_auth_start(plugin.auth_name())
+        extra_data = self.protocol.read_auth_continue()
+        self.protocol.send_auth_continue(plugin.auth_data(extra_data))
+        self.protocol.read_auth_ok()
+
+    def _deallocate_statement(self, statement):
+        """Deallocates statement.
+
+        Args:
+            statement (Statement): A `Statement` based type object.
+        """
+        if statement.prepared:
+            self.protocol.send_prepare_deallocate(statement.stmt_id)
+            self._prepared_stmt_ids.remove(statement.stmt_id)
+            statement.prepared = False
+
+    def _prepare_statement(self, msg_type, msg, statement):
+        """Prepares a statement.
+
+        Args:
+            msg_type (str): Message ID string.
+            msg (mysqlx.protobuf.Message): MySQL X Protobuf Message.
+            statement (Statement): A `Statement` based type object.
+        """
+        try:
+            self.fetch_active_result()
+            self.protocol.send_prepare_prepare(msg_type, msg, statement)
+        except NotSupportedError:
+            self._prepared_stmt_supported = False
+            return
+        self._prepared_stmt_ids.append(statement.stmt_id)
+        statement.prepared = True
+
+    def _execute_prepared_pipeline(self, msg_type, msg, statement):
+        """Executes the prepared statement pipeline.
+
+        Args:
+            msg_type (str): Message ID string.
+            msg (mysqlx.protobuf.Message): MySQL X Protobuf Message.
+            statement (Statement): A `Statement` based type object.
+        """
+        # For old servers without prepared statement support
+        if not self._prepared_stmt_supported:
+            # Crud::<Operation>
+            self.protocol.send_msg_without_ps(msg_type, msg, statement)
+            return
+
+        if statement.deallocate_prepare_execute:
+            # Prepare::Deallocate + Prepare::Prepare + Prepare::Execute
+            self._deallocate_statement(statement)
+            self._prepare_statement(msg_type, msg, statement)
+            if not self._prepared_stmt_supported:
+                self.protocol.send_msg_without_ps(msg_type, msg, statement)
+                return
+            self.protocol.send_prepare_execute(msg_type, msg, statement)
+            statement.deallocate_prepare_execute = False
+            statement.reset_exec_counter()
+        elif statement.prepared and not statement.changed:
+            # Prepare::Execute
+            self.protocol.send_prepare_execute(msg_type, msg, statement)
+        elif statement.changed and not statement.repeated:
+            # Crud::<Operation>
+            self._deallocate_statement(statement)
+            self.protocol.send_msg_without_ps(msg_type, msg, statement)
+            statement.changed = False
+            statement.reset_exec_counter()
+        elif not statement.changed and not statement.repeated:
+            # Prepare::Prepare + Prepare::Execute
+            if not statement.prepared:
+                self._prepare_statement(msg_type, msg, statement)
+            if not self._prepared_stmt_supported:
+                self.protocol.send_msg_without_ps(msg_type, msg, statement)
+                return
+            self.protocol.send_prepare_execute(msg_type, msg, statement)
+        elif statement.changed and statement.repeated:
+            # Prepare::Deallocate + Crud::<Operation>
+            self._deallocate_statement(statement)
+            self.protocol.send_msg_without_ps(msg_type, msg, statement)
+            statement.changed = False
+            statement.reset_exec_counter()
+
+        statement.increment_exec_counter()
+
+    @catch_network_exception
+    def send_sql(self, statement):
+        """Execute a SQL statement.
+
+        Args:
+            sql (str): The SQL statement.
+
+        Raises:
+            :class:`mysqlx.ProgrammingError`: If the SQL statement is not a
+                                              valid string.
+        """
+        sql = statement.sql
+        if self.protocol is None:
+            raise OperationalError("MySQLx Connection not available")
+        if not isinstance(sql, STRING_TYPES):
+            raise ProgrammingError("The SQL statement is not a valid string")
+        if not PY3 and isinstance(sql, UNICODE_TYPES):
+            msg_type, msg = self.protocol.build_execute_statement(
+                "sql", bytes(bytearray(sql, "utf-8")))
+        else:
+            msg_type, msg = self.protocol.build_execute_statement(
+                "sql", sql)
+        self.protocol.send_msg_without_ps(msg_type, msg, statement)
+        return SqlResult(self)
+
+    @catch_network_exception
+    def send_insert(self, statement):
+        """Send an insert statement.
+
+        Args:
+            statement (`Statement`): It can be :class:`mysqlx.InsertStatement`
+                                     or :class:`mysqlx.AddStatement`.
+
+        Returns:
+            :class:`mysqlx.Result`: A result object.
+        """
+        if self.protocol is None:
+            raise OperationalError("MySQLx Connection not available")
+        msg_type, msg = self.protocol.build_insert(statement)
+        self.protocol.send_msg(msg_type, msg)
+        ids = None
+        if isinstance(statement, AddStatement):
+            ids = statement.ids
+        return Result(self, ids)
+
+    @catch_network_exception
+    def send_find(self, statement):
+        """Send an find statement.
+
+        Args:
+            statement (`Statement`): It can be :class:`mysqlx.SelectStatement`
+                                     or :class:`mysqlx.FindStatement`.
+
+        Returns:
+            `Result`: It can be class:`mysqlx.DocResult` or
+                      :class:`mysqlx.RowResult`.
+        """
+        msg_type, msg = self.protocol.build_find(statement)
+        self._execute_prepared_pipeline(msg_type, msg, statement)
+        return DocResult(self) if statement.is_doc_based() else RowResult(self)
+
+    @catch_network_exception
+    def send_delete(self, statement):
+        """Send an delete statement.
+
+        Args:
+            statement (`Statement`): It can be :class:`mysqlx.RemoveStatement`
+                                     or :class:`mysqlx.DeleteStatement`.
+
+        Returns:
+            :class:`mysqlx.Result`: The result object.
+        """
+        msg_type, msg = self.protocol.build_delete(statement)
+        self._execute_prepared_pipeline(msg_type, msg, statement)
+        return Result(self)
+
+    @catch_network_exception
+    def send_update(self, statement):
+        """Send an delete statement.
+
+        Args:
+            statement (`Statement`): It can be :class:`mysqlx.ModifyStatement`
+                                     or :class:`mysqlx.UpdateStatement`.
+
+        Returns:
+            :class:`mysqlx.Result`: The result object.
+        """
+        msg_type, msg = self.protocol.build_update(statement)
+        self._execute_prepared_pipeline(msg_type, msg, statement)
+        return Result(self)
+
+    @catch_network_exception
+    def execute_nonquery(self, namespace, cmd, raise_on_fail, fields=None):
+        """Execute a non query command.
+
+        Args:
+            namespace (str): The namespace.
+            cmd (str): The command.
+            raise_on_fail (bool): `True` to raise on fail.
+            fields (Optional[dict]): The message fields.
+
+        Raises:
+            :class:`mysqlx.OperationalError`: On errors.
+
+        Returns:
+            :class:`mysqlx.Result`: The result object.
+        """
+        try:
+            msg_type, msg = \
+                self.protocol.build_execute_statement(namespace, cmd, fields)
+            self.protocol.send_msg(msg_type, msg)
+            return Result(self)
+        except OperationalError:
+            if raise_on_fail:
+                raise
+
+    @catch_network_exception
+    def execute_sql_scalar(self, sql):
+        """Execute a SQL scalar.
+
+        Args:
+            sql (str): The SQL statement.
+
+        Raises:
+            :class:`mysqlx.InterfaceError`: If no data found.
+
+        Returns:
+            :class:`mysqlx.Result`: The result.
+        """
+        msg_type, msg = self.protocol.build_execute_statement("sql", sql)
+        self.protocol.send_msg(msg_type, msg)
+        result = RowResult(self)
+        result.fetch_all()
+        if result.count == 0:
+            raise InterfaceError("No data found")
+        return result[0][0]
+
+    @catch_network_exception
+    def get_row_result(self, cmd, fields):
+        """Returns the row result.
+
+        Args:
+            cmd (str): The command.
+            fields (dict): The message fields.
+
+        Returns:
+            :class:`mysqlx.RowResult`: The result object.
+        """
+        msg_type, msg = \
+            self.protocol.build_execute_statement("mysqlx", cmd, fields)
+        self.protocol.send_msg(msg_type, msg)
+        return RowResult(self)
+
+    @catch_network_exception
+    def read_row(self, result):
+        """Read row.
+
+        Args:
+            result (:class:`mysqlx.RowResult`): The result object.
+        """
+        return self.protocol.read_row(result)
+
+    @catch_network_exception
+    def close_result(self, result):
+        """Close result.
+
+        Args:
+            result (:class:`mysqlx.Result`): The result object.
+        """
+        self.protocol.close_result(result)
+
+    @catch_network_exception
+    def get_column_metadata(self, result):
+        """Get column metadata.
+
+        Args:
+            result (:class:`mysqlx.Result`): The result object.
+        """
+        return self.protocol.get_column_metadata(result)
+
+    def get_next_statement_id(self):
+        """Returns the next statement ID.
+
+        Returns:
+            int: A statement ID.
+
+        .. versionadded:: 8.0.16
+        """
+        self._stmt_counter += 1
+        return self._stmt_counter
+
+    def is_open(self):
+        """Check if connection is open.
+
+        Returns:
+            bool: `True` if connection is open.
+        """
+        return self.stream.is_open()
+
+    def disconnect(self):
+        """Disconnect from server."""
+        if not self.is_open():
+            return
+        self.stream.close()
+
+    def close_session(self):
+        """Close a sucessfully authenticated session."""
+        if not self.is_open():
+            return
+
+        try:
+            # Fetch any active result
+            self.fetch_active_result()
+            # Deallocate all prepared statements
+            if self._prepared_stmt_supported:
+                for stmt_id in self._prepared_stmt_ids:
+                    self.protocol.send_prepare_deallocate(stmt_id)
+                self._stmt_counter = 0
+            # Send session close
+            self.protocol.send_close()
+            self.protocol.read_ok()
+        except (InterfaceError, OperationalError, OSError) as err:
+            _LOGGER.warning("Warning: An error occurred while attempting to "
+                            "close the connection: {}".format(err))
+        finally:
+            # The remote connection with the server has been lost,
+            # close the connection locally.
+            self.stream.close()
+
+    def reset_session(self):
+        """Reset a sucessfully authenticated session."""
+        if not self.is_open():
+            return
+        if self._active_result is not None:
+            self._active_result.fetch_all()
+        try:
+            self.keep_open = self.protocol.send_reset(self.keep_open)
+        except (InterfaceError, OperationalError) as err:
+            _LOGGER.warning("Warning: An error occurred while attempting to "
+                            "reset the session: {}".format(err))
+
+    def close_connection(self):
+        """Announce to the server that the client wants to close the
+        connection. Discards any session state of the server.
+        """
+        if not self.is_open():
+            return
+        if self._active_result is not None:
+            self._active_result.fetch_all()
+        self.protocol.send_connection_close()
+        self.protocol.read_ok()
+        self.stream.close()
+
+
+class PooledConnection(Connection):
+    """Class to hold :class:`Connection` instances in a pool.
+
+    PooledConnection is used by :class:`ConnectionPool` to facilitate the
+    connection to return to the pool once is not required, more specifically
+    once the close_session() method is invoked. It works like a normal
+    Connection except for methods like close() and sql().
+
+    The close_session() method will add the connection back to the pool rather
+    than disconnecting from the MySQL server.
+
+    The sql() method is used to execute sql statements.
+
+    Args:
+        pool (ConnectionPool): The pool where this connection must return.
+
+    .. versionadded:: 8.0.13
+    """
+    def __init__(self, pool):
+        if not isinstance(pool, ConnectionPool):
+            raise AttributeError("pool should be a ConnectionPool object")
+        super(PooledConnection, self).__init__(pool.cnx_config)
+        self.pool = pool
+        self.host = pool.cnx_config["host"]
+        self.port = pool.cnx_config["port"]
+
+    def close_connection(self):
+        """Closes the connection.
+
+        This method closes the socket.
+        """
+        super(PooledConnection, self).close_session()
+
+    def close_session(self):
+        """Do not close, but add connection back to pool.
+
+        The close_session() method does not close the connection with the
+        MySQL server. The connection is added back to the pool so it
+        can be reused.
+
+        When the pool is configured to reset the session, the session
+        state will be cleared by re-authenticating the user once the connection
+        is get from the pool.
+        """
+        self.pool.add_connection(self)
+
+    def reconnect(self):
+        """Reconnect this connection.
+        """
+        if self._active_result is not None:
+            self._active_result.fetch_all()
+        self._authenticate()
+
+    def reset(self):
+        """Reset the connection.
+
+        Resets the connection by re-authenticate.
+        """
+        self.reconnect()
+
+    def sql(self, sql):
+        """Creates a :class:`mysqlx.SqlStatement` object to allow running the
+        SQL statement on the target MySQL Server.
+
+        Args:
+            sql (string): The SQL statement to be executed.
+
+        Returns:
+            mysqlx.SqlStatement: SqlStatement object.
+        """
+        return SqlStatement(self, sql)
+
+
+class ConnectionPool(queue.Queue):
+    """This class represents a pool of connections.
+
+    Initializes the Pool with the given name and settings.
+
+    Args:
+        name (str): The name of the pool, used to track a single pool per
+                    combination of host and user.
+        **kwargs:
+            max_size (int): The maximun number of connections to hold in
+                            the pool.
+            reset_session (bool): If the connection should be reseted when
+                                  is taken from the pool.
+            max_idle_time (int): The maximum number of milliseconds to allow
+                                 a connection to be idle in the queue before
+                                 being closed. Zero value means infinite.
+            queue_timeout (int): The maximum number of milliseconds a
+                                 request will wait for a connection to
+                                 become available. A zero value means
+                                 infinite.
+            priority (int): The router priority, to choose this pool over
+                            other with lower priority.
+
+    Raises:
+        :class:`mysqlx.PoolError` on errors.
+
+    .. versionadded:: 8.0.13
+    """
+    def __init__(self, name, **kwargs):
+        self._set_pool_name(name)
+        self._open_sessions = 0
+        self._connections_openned = []
+        self._available = True
+        self._timeout = 0
+        self._timeout_stamp = datetime.now()
+        self.pool_max_size = kwargs.get("max_size", 25)
+        # Can't invoke super due to Queue not is a new-style class
+        queue.Queue.__init__(self, self.pool_max_size)
+        self.reset_session = kwargs.get("reset_session", True)
+        self.max_idle_time = kwargs.get("max_idle_time", 25)
+        self.settings = kwargs
+        self.queue_timeout = kwargs.get("queue_timeout", 25)
+        self.priority = kwargs.get("priority", 0)
+        self.cnx_config = kwargs
+        self.host = kwargs['host']
+        self.port = kwargs['port']
+
+    def _set_pool_name(self, pool_name):
+        r"""Set the name of the pool.
+
+        This method checks the validity and sets the name of the pool.
+
+        Args:
+            pool_name (str): The pool name.
+
+        Raises:
+            AttributeError: If the pool_name contains illegal characters
+                            ([^a-zA-Z0-9._\-*$#]) or is longer than
+                            connection._CNX_POOL_MAX_NAME_SIZE.
+        """
+        if _CNX_POOL_NAME_REGEX.search(pool_name):
+            raise AttributeError(
+                "Pool name '{0}' contains illegal characters".format(pool_name))
+        if len(pool_name) > _CNX_POOL_MAX_NAME_SIZE:
+            raise AttributeError(
+                "Pool name '{0}' is too long".format(pool_name))
+        self.name = pool_name
+
+    @property
+    def open_connections(self):
+        """Returns the number of open connections that can return to this pool.
+        """
+        return len(self._connections_openned)
+
+    def remove_connection(self, cnx=None):
+        """Removes a connection from this pool.
+
+        Args:
+            cnx (PooledConnection): The connection object.
+        """
+        self._connections_openned.remove(cnx)
+
+    def add_connection(self, cnx=None):
+        """Adds a connection to this pool.
+
+        This method instantiates a Connection using the configuration passed
+        when initializing the ConnectionPool instance or using the set_config()
+        method.
+        If cnx is a Connection instance, it will be added to the queue.
+
+        Args:
+            cnx (PooledConnection): The connection object.
+
+        Raises:
+            PoolError: If no configuration is set, if no more connection can
+                       be added (maximum reached) or if the connection can not
+                       be instantiated.
+        """
+        if not self.cnx_config:
+            raise PoolError("Connection configuration not available")
+
+        if self.full():
+            raise PoolError("Failed adding connection; queue is full")
+
+        if not cnx:
+            cnx = PooledConnection(self)
+            # mysqlx_wait_timeout is only available on MySQL 8
+            ver = cnx.sql('show variables like "version"'
+                         ).execute().fetch_all()[0][1]
+            if tuple([int(n) for n in ver.split("-")[0].split(".")]) > \
+                (8, 0, 10):
+                cnx.sql("set mysqlx_wait_timeout = {}"
+                        "".format(self.max_idle_time)).execute()
+            self._connections_openned.append(cnx)
+        else:
+            if not isinstance(cnx, PooledConnection):
+                raise PoolError(
+                    "Connection instance not subclass of PooledSession.")
+
+        self.queue_connection(cnx)
+
+    def queue_connection(self, cnx):
+        """Put connection back in the queue:
+
+        This method is putting a connection back in the queue.
+        It will not acquire a lock as the methods using _queue_connection() will
+        have it set.
+
+        Args:
+            PooledConnection: The connection object.
+
+        Raises:
+            PoolError: On errors.
+        """
+        if not isinstance(cnx, PooledConnection):
+            raise PoolError(
+                "Connection instance not subclass of PooledSession.")
+
+        # Reset the connection
+        if self.reset_session:
+            cnx.reset_session()
+        try:
+            self.put(cnx, block=False)
+        except queue.Full:
+            PoolError("Failed adding connection; queue is full")
+
+    def track_connection(self, connection):
+        """Tracks connection in order of close it when client.close() is invoke.
+        """
+        self._connections_openned.append(connection)
+
+    def __str__(self):
+        return self.name
+
+    def available(self):
+        """Returns if this pool is available for pool connectinos from it.
+
+        Returns:
+            bool: True if this pool is available else False.
+        .. versionadded:: 8.0.20
+        """
+        return self._available
+
+    def set_unavailable(self, time_out=-1):
+        """Sets this pool unavailable for a period of time (in seconds).
+
+        .. versionadded:: 8.0.20
+        """
+        self._available = False
+        self._timeout_stamp = datetime.now()
+        self._timeout = time_out
+
+    def set_available(self):
+        """Sets this pool available for pool connectinos from it.
+
+        .. versionadded:: 8.0.20
+        """
+        self._available = True
+        self._timeout_stamp = datetime.now()
+
+    def get_timeout_stamp(self):
+        """Returnds the penalized time (timeout) and the time at the penalty.
+
+        Returns:
+            tuple: penalty seconds (int), timestamp at penalty (datetime object)
+        .. versionadded:: 8.0.20
+        """
+        return (self._timeout, self._timeout_stamp)
+
+    def close(self):
+        """Empty this ConnectionPool.
+        """
+        for cnx in self._connections_openned:
+            cnx.close_connection()
+
+
+class PoolsManager(object):
+    """Manages a pool of connections for a host or hosts in routers.
+
+    This class handles all the pools of Connections.
+
+    .. versionadded:: 8.0.13
+    """
+    __instance = None
+    __pools = {}
+
+    def __new__(cls):
+        if PoolsManager.__instance is None:
+            PoolsManager.__instance = object.__new__(cls)
+            PoolsManager.__pools = {}
+        return PoolsManager.__instance
+
+    def _pool_exists(self, client_id, pool_name):
+        """Verifies if a pool exists with the given name.
+
+        Args:
+            client_id (str): The client id.
+            pool_name (str): The name of the pool.
+
+        Returns:
+            bool: Returns `True` if the pool exists otherwise `False`.
+        """
+        pools = self.__pools.get(client_id, [])
+        for pool in pools:
+            if pool.name == pool_name:
+                return True
+        return False
+
+    def _get_pools(self, settings):
+        """Retrieves a list of pools that shares the given settings.
+
+        Args:
+            settings (dict): the configuration of the pool.
+
+        Returns:
+            list: A list of pools that shares the given settings.
+        """
+        available_pools = []
+        pool_names = []
+        connections_settings = self._get_connections_settings(settings)
+
+        # Generate the names of the pools this settings can connect to
+        for router_name, _ in connections_settings:
+            pool_names.append(router_name)
+
+        # Generate the names of the pools this settings can connect to
+        for pool in self.__pools.get(settings.get("client_id", "No id"), []):
+            if pool.name in pool_names:
+                available_pools.append(pool)
+        return available_pools
+
+    def _get_connections_settings(self, settings):
+        """Generates a list of separated connection settings for each host.
+
+        Gets a list of connection settings for each host or router found in the
+        given settings.
+
+        Args:
+            settings (dict): The configuration for the connections.
+
+        Returns:
+            list: A list of connections settings
+        """
+        pool_settings = settings.copy()
+        routers = pool_settings.get("routers", [])
+        connections_settings = []
+        if "routers" in pool_settings:
+            pool_settings.pop("routers")
+        if "host" in pool_settings and "port" in pool_settings:
+            routers.append({"priority": 100,
+                            "weight": 0,
+                            "host": pool_settings["host"],
+                            "port": pool_settings["port"]})
+        # Order routers
+        routers.sort(key=lambda x: (x["priority"], -x.get("weight", 0)))
+        for router in routers:
+            connection_settings = pool_settings.copy()
+            connection_settings["host"] = router["host"]
+            connection_settings["port"] = router["port"]
+            connection_settings["priority"] = router["priority"]
+            connection_settings["weight"] = router.get("weight", 0)
+            connections_settings.append(
+                (generate_pool_name(**connection_settings),
+                 connection_settings))
+        return connections_settings
+
+    def create_pool(self, cnx_settings):
+        """Creates a `ConnectionPool` instance to hold the connections.
+
+        Creates a `ConnectionPool` instance to hold the connections only if
+        no other pool exists with the same configuration.
+
+        Args:
+            cnx_settings (dict): The configuration for the connections.
+        """
+        connections_settings = self._get_connections_settings(cnx_settings)
+
+        # Subscribe client if it does not exists
+        if cnx_settings.get("client_id", "No id") not in self.__pools:
+            self.__pools[cnx_settings.get("client_id", "No id")] = []
+
+        # Create a pool for each router
+        for router_name, settings in connections_settings:
+            if self._pool_exists(cnx_settings.get("client_id", "No id"),
+                                 router_name):
+                continue
+            else:
+                pool = self.__pools.get(cnx_settings.get("client_id", "No id"),
+                                        [])
+                pool.append(ConnectionPool(router_name, **settings))
+
+    def _get_random_pool(self, pool_list):
+        """Get a random router from the group with the given priority.
+
+        Returns:
+            Router: a random router.
+
+        .. versionadded:: 8.0.20
+        """
+        if not pool_list:
+            return None
+        if len(pool_list) == 1:
+            return pool_list[0]
+
+        last = len(pool_list) - 1
+        index = random.randint(0, last)
+        return pool_list[index]
+
+    def get_sublist(self, pools, index, cur_priority):
+        sublist = []
+        next_priority = None
+        while index < len(pools):
+            next_priority = pools[index].priority
+            if cur_priority == next_priority and pools[index].available():
+                sublist.append(pools[index])
+            elif cur_priority != next_priority:
+                break
+            index += 1
+        return sublist
+
+    def _get_next_pool(self, pools, cur_priority):
+        index = 0
+        for pool in pools:
+            if pool.available() and cur_priority == pool.priority:
+                break
+            index += 1
+        subpool = []
+        while not subpool and index < len(pools):
+            subpool = self.get_sublist(pools, index, cur_priority)
+            index += 1
+        return self._get_random_pool(subpool)
+
+    def _get_next_priority(self, pools, cur_priority=None):
+        if cur_priority is None and pools:
+            return pools[0].priority
+        else:
+            # find the first pool that does not share the same priority
+            for t_pool in pools:
+                if t_pool.priority != cur_priority:
+                    cur_priority = t_pool.priority
+                    return cur_priority
+        return None
+
+    def _check_unavailable_pools(self, settings, revive=None):
+        pools = self._get_pools(settings)
+        for pool in pools:
+            if pool.available():
+                continue
+            timeout, timeout_stamp = pool.get_timeout_stamp()
+            if revive:
+                timeout = revive
+            if datetime.now() > (timeout_stamp + timedelta(seconds=timeout)):
+                pool.set_available()
+
+    def get_connection(self, settings):
+        """Get a connection from the pool.
+
+        This method returns an `PooledConnection` instance which has a reference
+        to the pool that created it, and can be used as a normal Connection.
+
+        When the MySQL connection is not connected, a reconnect is attempted.
+
+        Raises:
+            :class:`PoolError`: On errors.
+
+        Returns:
+            PooledConnection: A pooled connection object.
+        """
+        def set_mysqlx_wait_timeout(cnx):
+            ver = cnx.sql(_SHOW_VERSION_QUERY).execute().fetch_all()[0][1]
+            # mysqlx_wait_timeout is only available on MySQL 8
+            if tuple([int(n) for n in
+                      ver.split("-")[0].split(".")]) > (8, 0, 10):
+                cnx.sql("set mysqlx_wait_timeout = {}"
+                        "".format(pool.max_idle_time)).execute()
+
+        pools = self._get_pools(settings)
+        cur_priority = settings.get("cur_priority", None)
+        error_list = []
+
+        if cur_priority is None:
+            cur_priority = self._get_next_priority(pools, cur_priority)
+        settings["cur_priority"] = cur_priority
+        self._check_unavailable_pools(settings)
+        pool = self._get_next_pool(pools, cur_priority)
+
+        while pool is not None:
+            try:
+                # Check connections aviability in this pool
+                if pool.qsize() > 0:
+                    # We have connections in pool, try to return a working one
+                    with threading.RLock():
+                        try:
+                            cnx = pool.get(block=True,
+                                           timeout=pool.queue_timeout)
+                        except queue.Empty:
+                            raise PoolError(
+                                "Failed getting connection; pool exhausted")
+                        try:
+                            # Only reset the connection by re-authentification
+                            # if the connection was unable to keep open by the
+                            # server
+                            if not cnx.keep_open:
+                                cnx.reset()
+                            set_mysqlx_wait_timeout(cnx)
+                        except (RuntimeError, socket.error, InterfaceError):
+                            # Unable to reset connection, close and remove
+                            try:
+                                cnx.close_connection()
+                            except (RuntimeError, socket.error, InterfaceError):
+                                pass
+                            finally:
+                                pool.remove_connection(cnx)
+                            # By WL#13222 all idle sessions that connect to the
+                            # same endpoint should be removed from the pool.
+                            while pool.qsize() > 0:
+                                try:
+                                    cnx = pool.get(block=True,
+                                                   timeout=pool.queue_timeout)
+                                except queue.Empty:
+                                    pass
+                                else:
+                                    try:
+                                        cnx.close_connection()
+                                    except (RuntimeError, socket.error, InterfaceError):
+                                        pass
+                                    finally:
+                                        pool.remove_connection(cnx)
+                            # Connection was closed by the server, create new
+                            try:
+                                cnx = PooledConnection(pool)
+                                pool.track_connection(cnx)
+                                cnx.connect()
+                                set_mysqlx_wait_timeout(cnx)
+                            except (RuntimeError, socket.error, InterfaceError):
+                                pass
+                            finally:
+                                # Server must be down, take down idle
+                                # connections from this pool
+                                while pool.qsize() > 0:
+                                    try:
+                                        cnx = pool.get(block=True,
+                                                       timeout=pool.queue_timeout)
+                                        cnx.close_connection()
+                                        pool.remove_connection(cnx)
+                                    except (RuntimeError, socket.error, InterfaceError):
+                                        pass
+                        return cnx
+                elif pool.open_connections < pool.pool_max_size:
+                    # No connections in pool, but we can open a new one
+                    cnx = PooledConnection(pool)
+                    pool.track_connection(cnx)
+                    cnx.connect()
+                    set_mysqlx_wait_timeout(cnx)
+                    return cnx
+                else:
+                    # Pool is exaust so the client needs to wait
+                    with threading.RLock():
+                        try:
+                            cnx = pool.get(block=True,
+                                           timeout=pool.queue_timeout)
+                            cnx.reset()
+                            set_mysqlx_wait_timeout(cnx)
+                            return cnx
+                        except queue.Empty:
+                            raise PoolError("pool max size has been reached")
+            except (InterfaceError, TimeoutError, PoolError) as err:
+                error_list.append("pool: {} error: {}".format(pool, err))
+                if isinstance(err, PoolError):
+                    # Pool can be exhaust now but can be ready again in no time,
+                    # e.g a connection is returned to the pool.
+                    pool.set_unavailable(2)
+                else:
+                    penalty = None
+                    for timeout_penalty in _TIMEOUT_PENALTIES:
+                        if timeout_penalty in err.msg:
+                            penalty = _TIMEOUT_PENALTIES[timeout_penalty]
+                    if penalty:
+                        pool.set_unavailable(penalty)
+                    else:
+                        # Other errors are severe punished
+                        pool.set_unavailable(100000)
+
+                self._check_unavailable_pools(settings)
+                # Try next pool with the same priority
+                pool = self._get_next_pool(pools, cur_priority)
+
+                if pool is None:
+                    cur_priority = self._get_next_priority(pools, cur_priority)
+                    settings["cur_priority"] = cur_priority
+                    pool = self._get_next_pool(pools, cur_priority)
+                    if pool is None:
+                        msg = "\n  ".join(error_list)
+                        raise PoolError("Unable to connect to any of the "
+                                        "target hosts: [\n  {}\n]".format(msg))
+                continue
+
+    def close_pool(self, cnx_settings):
+        """Closes the connections in the pools
+
+        Returns:
+            int: The number of closed pools
+        """
+        pools = self._get_pools(cnx_settings)
+        for pool in pools:
+            pool.close()
+            # Remove the pool
+            if cnx_settings.get("client_id", None) is not None:
+                client_pools = self.__pools.get(cnx_settings.get("client_id"))
+                if pool in client_pools:
+                    client_pools.remove(pool)
+        return len(pools)
+
+
+class Session(object):
+    """Enables interaction with a X Protocol enabled MySQL Product.
+
+    The functionality includes:
+
+    - Accessing available schemas.
+    - Schema management operations.
+    - Enabling/disabling warning generation.
+    - Retrieval of connection information.
+
+    Args:
+        settings (dict): Connection data used to connect to the database.
+    """
+
+    def __init__(self, settings):
+        self.use_pure = settings.get("use-pure", Protobuf.use_pure)
+        self._settings = settings
+
+        # Check for DNS SRV
+        if settings.get("host") and settings.get("dns-srv"):
+            if not HAVE_DNSPYTHON:
+                raise InterfaceError("MySQL host configuration requested DNS "
+                                     "SRV. This requires the Python dnspython "
+                                     "module. Please refer to documentation")
+            try:
+                srv_records = dns.resolver.query(settings["host"], "SRV")
+            except dns.exception.DNSException:
+                raise InterfaceError("Unable to locate any hosts for '{0}'"
+                                     "".format(settings["host"]))
+            self._settings["routers"] = []
+            for srv in srv_records:
+                self._settings["routers"].append({
+                    "host": srv.target.to_text(omit_final_dot=True),
+                    "port": srv.port,
+                    "priority": srv.priority,
+                    "weight": srv.weight
+                })
+
+        if "connection-attributes" not in self._settings or \
+           self._settings["connection-attributes"] != False:
+            self._settings["attributes"] = {}
+            self._init_attributes()
+
+        if "pooling" in settings and settings["pooling"]:
+            # Create pool and retrieve a Connection instance
+            PoolsManager().create_pool(settings)
+            self._connection = PoolsManager().get_connection(settings)
+            if self._connection is None:
+                raise PoolError("Connection could not be retrieved from pool")
+        else:
+            self._connection = Connection(self._settings)
+            self._connection.connect()
+        # Set default schema
+        schema = self._settings.get("schema")
+        if schema:
+            try:
+                self.sql("USE {}".format(quote_identifier(schema))).execute()
+            except OperationalError as err:
+                # Access denied for user will raise err.errno = 1044
+                errmsg = err.msg if err.errno == 1044 \
+                    else "Default schema '{}' does not exists".format(schema)
+                raise InterfaceError(errmsg, err.errno)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.close()
+
+    def _init_attributes(self):
+        """Setup default and user defined connection-attributes."""
+        if os.name == "nt":
+            if "64" in platform.architecture()[0]:
+                platform_arch = 'x86_64'
+            elif "32" in platform.architecture()[0]:
+                platform_arch = 'i386'
+            else:
+                platform_arch = platform.architecture()
+            os_ver = "Windows-{}".format(platform.win32_ver()[1])
+        else:
+            platform_arch = platform.machine()
+            if platform.system() == "Darwin":
+                os_ver = "{}-{}".format("macOS", platform.mac_ver()[0])
+            else:
+                os_ver = "-".join(linux_distribution()[0:2])
+
+        license_chunks = LICENSE.split(' ')
+        if license_chunks[0] == "GPLv2":
+            client_license = "GPL-2.0"
+        else:
+            client_license = "Commercial"
+
+        default_attributes = {
+            # Process id
+            "_pid": str(os.getpid()),
+            # Platform architecture
+            "_platform": platform_arch,
+            # OS version
+            "_os": os_ver,
+            # Hostname of the local machine
+            "_source_host": socket.gethostname(),
+            # Client's name
+            "_client_name": "mysql-connector-python",
+            # Client's version
+            "_client_version": ".".join([str(x) for x in VERSION[0:3]]),
+            # Client's License identifier
+            "_client_license": client_license
+        }
+        self._settings["attributes"].update(default_attributes)
+
+        if "connection-attributes" in self._settings:
+            for attr_name in self._settings["connection-attributes"]:
+                attr_value = self._settings["connection-attributes"][attr_name]
+                # Validate name type
+                if not isinstance(attr_name, STRING_TYPES):
+                    raise InterfaceError("Attribute name '{}' must be a string "
+                                         "type".format(attr_name))
+                # Validate attribute name limit 32 characters
+                if len(attr_name) > 32:
+                    raise InterfaceError("Attribute name '{}' exceeds 32 "
+                                         "characters limit size"
+                                         "".format(attr_name))
+                # Validate names in connection-attributes cannot start with "_"
+                if attr_name.startswith("_"):
+                    raise InterfaceError("Key names in 'session-connect-"
+                                         "attributes' cannot start with '_', "
+                                         "found: {}".format(attr_name))
+                # Validate value type
+                if not isinstance(attr_value, STRING_TYPES):
+                    raise InterfaceError("Attribute name '{}' value '{}' must "
+                                         "be a string type"
+                                         "".format(attr_name, attr_value))
+
+                # Validate attribute value limit 1024 characters
+                if len(attr_value) > 1024:
+                    raise InterfaceError("Attribute name '{}' value: '{}' "
+                                         "exceeds 1024 characters limit size"
+                                         "".format(attr_name, attr_value))
+
+                self._settings["attributes"][attr_name] = attr_value
+
+    @property
+    def use_pure(self):
+        """bool: `True` to use pure Python Protobuf implementation.
+        """
+        return Protobuf.use_pure
+
+    @use_pure.setter
+    def use_pure(self, value):
+        if not isinstance(value, bool):
+            raise ProgrammingError("'use_pure' option should be True or False")
+        Protobuf.set_use_pure(value)
+
+    def is_open(self):
+        """Returns `True` if the session is open.
+
+        Returns:
+            bool: Returns `True` if the session is open.
+        """
+        return self._connection.stream.is_open()
+
+    def sql(self, sql):
+        """Creates a :class:`mysqlx.SqlStatement` object to allow running the
+        SQL statement on the target MySQL Server.
+
+        Args:
+            sql (string): The SQL statement to be executed.
+
+        Returns:
+            mysqlx.SqlStatement: SqlStatement object.
+        """
+        return SqlStatement(self._connection, sql)
+
+    def get_connection(self):
+        """Returns the underlying connection.
+
+        Returns:
+            mysqlx.connection.Connection: The connection object.
+        """
+        return self._connection
+
+    def get_schemas(self):
+        """Returns the list of schemas in the current session.
+
+        Returns:
+            `list`: The list of schemas in the current session.
+
+        .. versionadded:: 8.0.12
+        """
+        result = self.sql("SHOW DATABASES").execute()
+        return [row[0] for row in result.fetch_all()]
+
+    def get_schema(self, name):
+        """Retrieves a Schema object from the current session by it's name.
+
+        Args:
+            name (string): The name of the Schema object to be retrieved.
+
+        Returns:
+            mysqlx.Schema: The Schema object with the given name.
+        """
+        return Schema(self, name)
+
+    def get_default_schema(self):
+        """Retrieves a Schema object from the current session by the schema
+        name configured in the connection settings.
+
+        Returns:
+            mysqlx.Schema: The Schema object with the given name at connect
+                           time.
+            None: In case the default schema was not provided with the
+                  initialization data.
+
+        Raises:
+            :class:`mysqlx.ProgrammingError`: If the provided default schema
+                                              does not exists.
+        """
+        schema = self._connection.settings.get("schema")
+        if schema:
+            res = self.sql(
+                _SELECT_SCHEMA_NAME_QUERY.format(escape(schema))
+            ).execute().fetch_all()
+            try:
+                if res[0][0] == schema:
+                    return Schema(self, schema)
+            except IndexError:
+                raise ProgrammingError(
+                    "Default schema '{}' does not exists".format(schema))
+        return None
+
+    def drop_schema(self, name):
+        """Drops the schema with the specified name.
+
+        Args:
+            name (string): The name of the Schema object to be retrieved.
+        """
+        self._connection.execute_nonquery(
+            "sql", _DROP_DATABASE_QUERY.format(quote_identifier(name)), True)
+
+    def create_schema(self, name):
+        """Creates a schema on the database and returns the corresponding
+        object.
+
+        Args:
+            name (string): A string value indicating the schema name.
+        """
+        self._connection.execute_nonquery(
+            "sql", _CREATE_DATABASE_QUERY.format(quote_identifier(name)), True)
+        return Schema(self, name)
+
+    def start_transaction(self):
+        """Starts a transaction context on the server."""
+        self._connection.execute_nonquery("sql", "START TRANSACTION", True)
+
+    def commit(self):
+        """Commits all the operations executed after a call to
+        startTransaction().
+        """
+        self._connection.execute_nonquery("sql", "COMMIT", True)
+
+    def rollback(self):
+        """Discards all the operations executed after a call to
+        startTransaction().
+        """
+        self._connection.execute_nonquery("sql", "ROLLBACK", True)
+
+    def set_savepoint(self, name=None):
+        """Creates a transaction savepoint.
+
+        If a name is not provided, one will be generated using the uuid.uuid1()
+        function.
+
+        Args:
+            name (Optional[string]): The savepoint name.
+
+        Returns:
+            string: The savepoint name.
+        """
+        if name is None:
+            name = "{0}".format(uuid.uuid1())
+        elif not isinstance(name, STRING_TYPES) or len(name.strip()) == 0:
+            raise ProgrammingError("Invalid SAVEPOINT name")
+        self._connection.execute_nonquery("sql", "SAVEPOINT {0}"
+                                          "".format(quote_identifier(name)),
+                                          True)
+        return name
+
+    def rollback_to(self, name):
+        """Rollback to a transaction savepoint with the given name.
+
+        Args:
+            name (string): The savepoint name.
+        """
+        if not isinstance(name, STRING_TYPES) or len(name.strip()) == 0:
+            raise ProgrammingError("Invalid SAVEPOINT name")
+        self._connection.execute_nonquery("sql", "ROLLBACK TO SAVEPOINT {0}"
+                                          "".format(quote_identifier(name)),
+                                          True)
+
+    def release_savepoint(self, name):
+        """Release a transaction savepoint with the given name.
+
+        Args:
+            name (string): The savepoint name.
+        """
+        if not isinstance(name, STRING_TYPES) or len(name.strip()) == 0:
+            raise ProgrammingError("Invalid SAVEPOINT name")
+        self._connection.execute_nonquery("sql", "RELEASE SAVEPOINT {0}"
+                                          "".format(quote_identifier(name)),
+                                          True)
+
+    def close(self):
+        """Closes the session."""
+        self._connection.close_session()
+        # Set an unconnected connection
+        self._connection = Connection(self._settings)
+
+    def close_connections(self):
+        """Closes all underliying connections as pooled connections"""
+        self._connection.close_connection()
+
+
+class Client(object):
+    """Class defining a client, it stores a connection configuration.
+
+       Args:
+           connection_dict (dict): The connection information to connect to a
+                                   MySQL server.
+           options_dict (dict): The options to configure this client.
+
+       .. versionadded:: 8.0.13
+    """
+    def __init__(self, connection_dict, options_dict=None):
+        self.settings = connection_dict
+        if options_dict is None:
+            options_dict = {}
+
+        self.sessions = []
+        self.client_id = uuid.uuid4()
+
+        self._set_pool_size(options_dict.get("max_size", 25))
+        self._set_max_idle_time(options_dict.get("max_idle_time", 0))
+        self._set_queue_timeout(options_dict.get("queue_timeout", 0))
+        self._set_pool_enabled(options_dict.get("enabled", True))
+
+        self.settings["pooling"] = self.pooling_enabled
+        self.settings["max_size"] = self.max_size
+        self.settings["client_id"] = self.client_id
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self.close()
+
+    def _set_pool_size(self, pool_size):
+        """Set the size of the pool.
+
+        This method sets the size of the pool but it will not resize the pool.
+
+        Args:
+            pool_size (int): An integer equal or greater than 0 indicating
+                             the pool size.
+
+        Raises:
+            :class:`AttributeError`: If the pool_size value is not an integer
+                                     greater or equal to 0.
+        """
+        if isinstance(pool_size, bool) or not isinstance(pool_size, int) or \
+           not pool_size > 0:
+            raise AttributeError("Pool max_size value must be an integer "
+                                 "greater than 0, the given value {} "
+                                 "is not valid.".format(pool_size))
+
+        self.max_size = _CNX_POOL_MAXSIZE if pool_size == 0 else pool_size
+
+    def _set_max_idle_time(self, max_idle_time):
+        """Set the max idle time.
+
+        This method sets the max idle time.
+
+        Args:
+            max_idle_time (int): An integer equal or greater than 0 indicating
+                                 the max idle time.
+
+        Raises:
+            :class:`AttributeError`: If the max_idle_time value is not an
+                                     integer greater or equal to 0.
+        """
+        if isinstance(max_idle_time, bool) or \
+           not isinstance(max_idle_time, int) or not max_idle_time > -1:
+            raise AttributeError("Connection max_idle_time value must be an "
+                                 "integer greater or equal to 0, the given "
+                                 "value {} is not valid.".format(max_idle_time))
+
+        self.max_idle_time = max_idle_time
+        self.settings["max_idle_time"] = _CNX_POOL_MAX_IDLE_TIME \
+            if max_idle_time == 0 else int(max_idle_time / 1000)
+
+    def _set_pool_enabled(self, enabled):
+        """Set if the pool is enabled.
+
+        This method sets if the pool is enabled.
+
+        Args:
+            enabled (bool): True if to enabling the pool.
+
+        Raises:
+            :class:`AttributeError`: If the value of enabled is not a bool type.
+        """
+        if not isinstance(enabled, bool):
+            raise AttributeError("The enabled value should be True or False.")
+        self.pooling_enabled = enabled
+
+    def _set_queue_timeout(self, queue_timeout):
+        """Set the queue timeout.
+
+        This method sets the queue timeout.
+
+        Args:
+            queue_timeout (int): An integer equal or greater than 0 indicating
+                                 the queue timeout.
+
+        Raises:
+            :class:`AttributeError`: If the queue_timeout value is not an
+                                     integer greater or equal to 0.
+        """
+        if isinstance(queue_timeout, bool) or \
+           not isinstance(queue_timeout, int) or not queue_timeout > -1:
+            raise AttributeError("Connection queue_timeout value must be an "
+                                 "integer greater or equal to 0, the given "
+                                 "value {} is not valid.".format(queue_timeout))
+
+        self.queue_timeout = queue_timeout
+        self.settings["queue_timeout"] = _CNX_POOL_QUEUE_TIMEOUT \
+            if queue_timeout == 0 else int(queue_timeout / 1000)
+        # To avoid a connection stall waiting for the server, if the
+        # connect-timeout is not given, use the queue_timeout
+        if not "connect-timeout" in self.settings:
+            self.settings["connect-timeout"] = self.queue_timeout
+
+    def get_session(self):
+        """Creates a Session instance using the provided connection data.
+
+        Returns:
+            Session: Session object.
+        """
+        session = Session(self.settings)
+        self.sessions.append(session)
+        return session
+
+    def close(self):
+        """Closes the sessions opened by this client.
+        """
+        PoolsManager().close_pool(self.settings)
+        for session in self.sessions:
+            session.close_connections()
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/constants.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/constants.py
new file mode 100644
index 0000000..a1b4e99
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/constants.py
@@ -0,0 +1,323 @@
+# Copyright (c) 2016, 2019, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Constants."""
+
+from collections import namedtuple
+
+
+# pylint: disable=C0103
+def create_enum(name, fields, values=None):
+    """Emulates an enum by creating a namedtuple.
+
+    Args:
+        name (string): The type name.
+        fields (tuple): The fields names.
+        values (tuple): The values of the fields.
+
+    Returns:
+        namedtuple: A namedtuple object.
+    """
+    Enum = namedtuple(name, fields)
+    if values is None:
+        return Enum(*fields)
+    return Enum(*values)
+
+
+SSLMode = create_enum("SSLMode",
+                      ("REQUIRED", "DISABLED", "VERIFY_CA", "VERIFY_IDENTITY"),
+                      ("required", "disabled", "verify_ca", "verify_identity"))
+Auth = create_enum("Auth",
+                   ("PLAIN", "MYSQL41", "SHA256_MEMORY"),
+                   ("plain", "mysql41", "sha256_memory"))
+LockContention = create_enum("LockContention",
+                             ("DEFAULT", "NOWAIT", "SKIP_LOCKED"), (0, 1, 2))
+
+# Compression algorithms and aliases
+COMPRESSION_ALGORITHMS = {
+    "deflate": "deflate_stream",
+    "deflate_stream": "deflate_stream",
+    "lz4": "lz4_message",
+    "lz4_message": "lz4_message",
+    "zstd": "zstd_stream",
+    "zstd_stream": "zstd_stream"
+}
+
+TLS_VERSIONS = ["TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3"]
+
+# TLS v1.0 cipher suites IANI to OpenSSL name translation
+TLSV1_CIPHER_SUITES = {
+    "TLS_RSA_WITH_NULL_MD5": "NULL-MD5",
+    "TLS_RSA_WITH_NULL_SHA": "NULL-SHA",
+    "TLS_RSA_WITH_RC4_128_MD5": "RC4-MD5",
+    "TLS_RSA_WITH_RC4_128_SHA": "RC4-SHA",
+    "TLS_RSA_WITH_IDEA_CBC_SHA": "IDEA-CBC-SHA",
+    "TLS_RSA_WITH_3DES_EDE_CBC_SHA": "DES-CBC3-SHA",
+
+    "TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA": "Not implemented.",
+    "TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA": "Not implemented.",
+    "TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA": "DHE-DSS-DES-CBC3-SHA",
+    "TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA": "DHE-RSA-DES-CBC3-SHA",
+
+    "TLS_DH_anon_WITH_RC4_128_MD5": "ADH-RC4-MD5",
+    "TLS_DH_anon_WITH_3DES_EDE_CBC_SHA": "ADH-DES-CBC3-SHA",
+
+    # AES cipher suites from RFC3268, extending TLS v1.0
+    "TLS_RSA_WITH_AES_128_CBC_SHA": "AES128-SHA",
+    "TLS_RSA_WITH_AES_256_CBC_SHA": "AES256-SHA",
+
+    "TLS_DH_DSS_WITH_AES_128_CBC_SHA": "DH-DSS-AES128-SHA",
+    "TLS_DH_DSS_WITH_AES_256_CBC_SHA": "DH-DSS-AES256-SHA",
+    "TLS_DH_RSA_WITH_AES_128_CBC_SHA": "DH-RSA-AES128-SHA",
+    "TLS_DH_RSA_WITH_AES_256_CBC_SHA": "DH-RSA-AES256-SHA",
+
+    "TLS_DHE_DSS_WITH_AES_128_CBC_SHA": "DHE-DSS-AES128-SHA",
+    "TLS_DHE_DSS_WITH_AES_256_CBC_SHA": "DHE-DSS-AES256-SHA",
+    "TLS_DHE_RSA_WITH_AES_128_CBC_SHA": "DHE-RSA-AES128-SHA",
+    "TLS_DHE_RSA_WITH_AES_256_CBC_SHA": "DHE-RSA-AES256-SHA",
+
+    "TLS_DH_anon_WITH_AES_128_CBC_SHA": "ADH-AES128-SHA",
+    "TLS_DH_anon_WITH_AES_256_CBC_SHA": "ADH-AES256-SHA",
+
+    # Camellia cipher suites from RFC4132, extending TLS v1.0
+    "TLS_RSA_WITH_CAMELLIA_128_CBC_SHA": "CAMELLIA128-SHA",
+    "TLS_RSA_WITH_CAMELLIA_256_CBC_SHA": "CAMELLIA256-SHA",
+
+    "TLS_DH_DSS_WITH_CAMELLIA_128_CBC_SHA": "DH-DSS-CAMELLIA128-SHA",
+    "TLS_DH_DSS_WITH_CAMELLIA_256_CBC_SHA": "DH-DSS-CAMELLIA256-SHA",
+    "TLS_DH_RSA_WITH_CAMELLIA_128_CBC_SHA": "DH-RSA-CAMELLIA128-SHA",
+    "TLS_DH_RSA_WITH_CAMELLIA_256_CBC_SHA": "DH-RSA-CAMELLIA256-SHA",
+
+    "TLS_DHE_DSS_WITH_CAMELLIA_128_CBC_SHA": "DHE-DSS-CAMELLIA128-SHA",
+    "TLS_DHE_DSS_WITH_CAMELLIA_256_CBC_SHA": "DHE-DSS-CAMELLIA256-SHA",
+    "TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA": "DHE-RSA-CAMELLIA128-SHA",
+    "TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA": "DHE-RSA-CAMELLIA256-SHA",
+
+    "TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA": "ADH-CAMELLIA128-SHA",
+    "TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA": "ADH-CAMELLIA256-SHA",
+
+    # SEED cipher suites from RFC4162, extending TLS v1.0
+    "TLS_RSA_WITH_SEED_CBC_SHA": "SEED-SHA",
+
+    "TLS_DH_DSS_WITH_SEED_CBC_SHA": "DH-DSS-SEED-SHA",
+    "TLS_DH_RSA_WITH_SEED_CBC_SHA": "DH-RSA-SEED-SHA",
+
+    "TLS_DHE_DSS_WITH_SEED_CBC_SHA": "DHE-DSS-SEED-SHA",
+    "TLS_DHE_RSA_WITH_SEED_CBC_SHA": "DHE-RSA-SEED-SHA",
+
+    "TLS_DH_anon_WITH_SEED_CBC_SHA": "ADH-SEED-SHA",
+
+    # GOST cipher suites from draft-chudov-cryptopro-cptls, extending TLS v1.0
+    "TLS_GOSTR341094_WITH_28147_CNT_IMIT": "GOST94-GOST89-GOST89",
+    "TLS_GOSTR341001_WITH_28147_CNT_IMIT": "GOST2001-GOST89-GOST89",
+    "TLS_GOSTR341094_WITH_NULL_GOSTR3411": "GOST94-NULL-GOST94",
+    "TLS_GOSTR341001_WITH_NULL_GOSTR3411": "GOST2001-NULL-GOST94"}
+
+# TLS v1.1 cipher suites IANI to OpenSSL name translation
+TLSV1_1_CIPHER_SUITES = TLSV1_CIPHER_SUITES
+
+# TLS v1.2 cipher suites IANI to OpenSSL name translation
+TLSV1_2_CIPHER_SUITES = {
+    "TLS_RSA_WITH_NULL_SHA256": "NULL-SHA256",
+
+    "TLS_RSA_WITH_AES_128_CBC_SHA256": "AES128-SHA256",
+    "TLS_RSA_WITH_AES_256_CBC_SHA256": "AES256-SHA256",
+    "TLS_RSA_WITH_AES_128_GCM_SHA256": "AES128-GCM-SHA256",
+    "TLS_RSA_WITH_AES_256_GCM_SHA384": "AES256-GCM-SHA384",
+
+    "TLS_DH_RSA_WITH_AES_128_CBC_SHA256": "DH-RSA-AES128-SHA256",
+    "TLS_DH_RSA_WITH_AES_256_CBC_SHA256": "DH-RSA-AES256-SHA256",
+    "TLS_DH_RSA_WITH_AES_128_GCM_SHA256": "DH-RSA-AES128-GCM-SHA256",
+    "TLS_DH_RSA_WITH_AES_256_GCM_SHA384": "DH-RSA-AES256-GCM-SHA384",
+
+    "TLS_DH_DSS_WITH_AES_128_CBC_SHA256": "DH-DSS-AES128-SHA256",
+    "TLS_DH_DSS_WITH_AES_256_CBC_SHA256": "DH-DSS-AES256-SHA256",
+    "TLS_DH_DSS_WITH_AES_128_GCM_SHA256": "DH-DSS-AES128-GCM-SHA256",
+    "TLS_DH_DSS_WITH_AES_256_GCM_SHA384": "DH-DSS-AES256-GCM-SHA384",
+
+    "TLS_DHE_RSA_WITH_AES_128_CBC_SHA256": "DHE-RSA-AES128-SHA256",
+    "TLS_DHE_RSA_WITH_AES_256_CBC_SHA256": "DHE-RSA-AES256-SHA256",
+    "TLS_DHE_RSA_WITH_AES_128_GCM_SHA256": "DHE-RSA-AES128-GCM-SHA256",
+    "TLS_DHE_RSA_WITH_AES_256_GCM_SHA384": "DHE-RSA-AES256-GCM-SHA384",
+
+    "TLS_DHE_DSS_WITH_AES_128_CBC_SHA256": "DHE-DSS-AES128-SHA256",
+    "TLS_DHE_DSS_WITH_AES_256_CBC_SHA256": "DHE-DSS-AES256-SHA256",
+    "TLS_DHE_DSS_WITH_AES_128_GCM_SHA256": "DHE-DSS-AES128-GCM-SHA256",
+    "TLS_DHE_DSS_WITH_AES_256_GCM_SHA384": "DHE-DSS-AES256-GCM-SHA384",
+
+    "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256": "ECDHE-RSA-AES128-SHA256",
+    "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384": "ECDHE-RSA-AES256-SHA384",
+    "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256": "ECDHE-RSA-AES128-GCM-SHA256",
+    "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384": "ECDHE-RSA-AES256-GCM-SHA384",
+
+    "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256": "ECDHE-ECDSA-AES128-SHA256",
+    "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384": "ECDHE-ECDSA-AES256-SHA384",
+    "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": "ECDHE-ECDSA-AES128-GCM-SHA256",
+    "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384": "ECDHE-ECDSA-AES256-GCM-SHA384",
+
+    "TLS_DH_anon_WITH_AES_128_CBC_SHA256": "ADH-AES128-SHA256",
+    "TLS_DH_anon_WITH_AES_256_CBC_SHA256": "ADH-AES256-SHA256",
+    "TLS_DH_anon_WITH_AES_128_GCM_SHA256": "ADH-AES128-GCM-SHA256",
+    "TLS_DH_anon_WITH_AES_256_GCM_SHA384": "ADH-AES256-GCM-SHA384",
+
+    "RSA_WITH_AES_128_CCM": "AES128-CCM",
+    "RSA_WITH_AES_256_CCM": "AES256-CCM",
+    "DHE_RSA_WITH_AES_128_CCM": "DHE-RSA-AES128-CCM",
+    "DHE_RSA_WITH_AES_256_CCM": "DHE-RSA-AES256-CCM",
+    "RSA_WITH_AES_128_CCM_8": "AES128-CCM8",
+    "RSA_WITH_AES_256_CCM_8": "AES256-CCM8",
+    "DHE_RSA_WITH_AES_128_CCM_8": "DHE-RSA-AES128-CCM8",
+    "DHE_RSA_WITH_AES_256_CCM_8": "DHE-RSA-AES256-CCM8",
+    "ECDHE_ECDSA_WITH_AES_128_CCM": "ECDHE-ECDSA-AES128-CCM",
+    "ECDHE_ECDSA_WITH_AES_256_CCM": "ECDHE-ECDSA-AES256-CCM",
+    "ECDHE_ECDSA_WITH_AES_128_CCM_8": "ECDHE-ECDSA-AES128-CCM8",
+    "ECDHE_ECDSA_WITH_AES_256_CCM_8": "ECDHE-ECDSA-AES256-CCM8",
+
+    # ARIA cipher suites from RFC6209, extending TLS v1.2
+    "TLS_RSA_WITH_ARIA_128_GCM_SHA256": "ARIA128-GCM-SHA256",
+    "TLS_RSA_WITH_ARIA_256_GCM_SHA384": "ARIA256-GCM-SHA384",
+    "TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256": "DHE-RSA-ARIA128-GCM-SHA256",
+    "TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384": "DHE-RSA-ARIA256-GCM-SHA384",
+    "TLS_DHE_DSS_WITH_ARIA_128_GCM_SHA256": "DHE-DSS-ARIA128-GCM-SHA256",
+    "TLS_DHE_DSS_WITH_ARIA_256_GCM_SHA384": "DHE-DSS-ARIA256-GCM-SHA384",
+    "TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256": "ECDHE-ECDSA-ARIA128-GCM-SHA256",
+    "TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384": "ECDHE-ECDSA-ARIA256-GCM-SHA384",
+    "TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256": "ECDHE-ARIA128-GCM-SHA256",
+    "TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384": "ECDHE-ARIA256-GCM-SHA384",
+    "TLS_PSK_WITH_ARIA_128_GCM_SHA256": "PSK-ARIA128-GCM-SHA256",
+    "TLS_PSK_WITH_ARIA_256_GCM_SHA384": "PSK-ARIA256-GCM-SHA384",
+    "TLS_DHE_PSK_WITH_ARIA_128_GCM_SHA256": "DHE-PSK-ARIA128-GCM-SHA256",
+    "TLS_DHE_PSK_WITH_ARIA_256_GCM_SHA384": "DHE-PSK-ARIA256-GCM-SHA384",
+    "TLS_RSA_PSK_WITH_ARIA_128_GCM_SHA256": "RSA-PSK-ARIA128-GCM-SHA256",
+    "TLS_RSA_PSK_WITH_ARIA_256_GCM_SHA384": "RSA-PSK-ARIA256-GCM-SHA384",
+
+    # Camellia HMAC-Based cipher suites from RFC6367, extending TLS v1.2
+    "TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256": "ECDHE-ECDSA-CAMELLIA128-SHA256",
+    "TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384": "ECDHE-ECDSA-CAMELLIA256-SHA384",
+    "TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256": "ECDHE-RSA-CAMELLIA128-SHA256",
+    "TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384": "ECDHE-RSA-CAMELLIA256-SHA384",
+
+    # Pre-shared keying (PSK) cipher suites",
+    "PSK_WITH_NULL_SHA": "PSK-NULL-SHA",
+    "DHE_PSK_WITH_NULL_SHA": "DHE-PSK-NULL-SHA",
+    "RSA_PSK_WITH_NULL_SHA": "RSA-PSK-NULL-SHA",
+
+    "PSK_WITH_RC4_128_SHA": "PSK-RC4-SHA",
+    "PSK_WITH_3DES_EDE_CBC_SHA": "PSK-3DES-EDE-CBC-SHA",
+    "PSK_WITH_AES_128_CBC_SHA": "PSK-AES128-CBC-SHA",
+    "PSK_WITH_AES_256_CBC_SHA": "PSK-AES256-CBC-SHA",
+
+    "DHE_PSK_WITH_RC4_128_SHA": "DHE-PSK-RC4-SHA",
+    "DHE_PSK_WITH_3DES_EDE_CBC_SHA": "DHE-PSK-3DES-EDE-CBC-SHA",
+    "DHE_PSK_WITH_AES_128_CBC_SHA": "DHE-PSK-AES128-CBC-SHA",
+    "DHE_PSK_WITH_AES_256_CBC_SHA": "DHE-PSK-AES256-CBC-SHA",
+
+    "RSA_PSK_WITH_RC4_128_SHA": "RSA-PSK-RC4-SHA",
+    "RSA_PSK_WITH_3DES_EDE_CBC_SHA": "RSA-PSK-3DES-EDE-CBC-SHA",
+    "RSA_PSK_WITH_AES_128_CBC_SHA": "RSA-PSK-AES128-CBC-SHA",
+    "RSA_PSK_WITH_AES_256_CBC_SHA": "RSA-PSK-AES256-CBC-SHA",
+
+    "PSK_WITH_AES_128_GCM_SHA256": "PSK-AES128-GCM-SHA256",
+    "PSK_WITH_AES_256_GCM_SHA384": "PSK-AES256-GCM-SHA384",
+    "DHE_PSK_WITH_AES_128_GCM_SHA256": "DHE-PSK-AES128-GCM-SHA256",
+    "DHE_PSK_WITH_AES_256_GCM_SHA384": "DHE-PSK-AES256-GCM-SHA384",
+    "RSA_PSK_WITH_AES_128_GCM_SHA256": "RSA-PSK-AES128-GCM-SHA256",
+    "RSA_PSK_WITH_AES_256_GCM_SHA384": "RSA-PSK-AES256-GCM-SHA384",
+
+    "PSK_WITH_AES_128_CBC_SHA256": "PSK-AES128-CBC-SHA256",
+    "PSK_WITH_AES_256_CBC_SHA384": "PSK-AES256-CBC-SHA384",
+    "PSK_WITH_NULL_SHA256": "PSK-NULL-SHA256",
+    "PSK_WITH_NULL_SHA384": "PSK-NULL-SHA384",
+    "DHE_PSK_WITH_AES_128_CBC_SHA256": "DHE-PSK-AES128-CBC-SHA256",
+    "DHE_PSK_WITH_AES_256_CBC_SHA384": "DHE-PSK-AES256-CBC-SHA384",
+    "DHE_PSK_WITH_NULL_SHA256": "DHE-PSK-NULL-SHA256",
+    "DHE_PSK_WITH_NULL_SHA384": "DHE-PSK-NULL-SHA384",
+    "RSA_PSK_WITH_AES_128_CBC_SHA256": "RSA-PSK-AES128-CBC-SHA256",
+    "RSA_PSK_WITH_AES_256_CBC_SHA384": "RSA-PSK-AES256-CBC-SHA384",
+    "RSA_PSK_WITH_NULL_SHA256": "RSA-PSK-NULL-SHA256",
+    "RSA_PSK_WITH_NULL_SHA384": "RSA-PSK-NULL-SHA384",
+
+    "ECDHE_PSK_WITH_RC4_128_SHA": "ECDHE-PSK-RC4-SHA",
+    "ECDHE_PSK_WITH_3DES_EDE_CBC_SHA": "ECDHE-PSK-3DES-EDE-CBC-SHA",
+    "ECDHE_PSK_WITH_AES_128_CBC_SHA": "ECDHE-PSK-AES128-CBC-SHA",
+    "ECDHE_PSK_WITH_AES_256_CBC_SHA": "ECDHE-PSK-AES256-CBC-SHA",
+    "ECDHE_PSK_WITH_AES_128_CBC_SHA256": "ECDHE-PSK-AES128-CBC-SHA256",
+    "ECDHE_PSK_WITH_AES_256_CBC_SHA384": "ECDHE-PSK-AES256-CBC-SHA384",
+    "ECDHE_PSK_WITH_NULL_SHA": "ECDHE-PSK-NULL-SHA",
+    "ECDHE_PSK_WITH_NULL_SHA256": "ECDHE-PSK-NULL-SHA256",
+    "ECDHE_PSK_WITH_NULL_SHA384": "ECDHE-PSK-NULL-SHA384",
+
+    "PSK_WITH_CAMELLIA_128_CBC_SHA256": "PSK-CAMELLIA128-SHA256",
+    "PSK_WITH_CAMELLIA_256_CBC_SHA384": "PSK-CAMELLIA256-SHA384",
+
+    "DHE_PSK_WITH_CAMELLIA_128_CBC_SHA256": "DHE-PSK-CAMELLIA128-SHA256",
+    "DHE_PSK_WITH_CAMELLIA_256_CBC_SHA384": "DHE-PSK-CAMELLIA256-SHA384",
+
+    "RSA_PSK_WITH_CAMELLIA_128_CBC_SHA256": "RSA-PSK-CAMELLIA128-SHA256",
+    "RSA_PSK_WITH_CAMELLIA_256_CBC_SHA384": "RSA-PSK-CAMELLIA256-SHA384",
+
+    "ECDHE_PSK_WITH_CAMELLIA_128_CBC_SHA256": "ECDHE-PSK-CAMELLIA128-SHA256",
+    "ECDHE_PSK_WITH_CAMELLIA_256_CBC_SHA384": "ECDHE-PSK-CAMELLIA256-SHA384",
+
+    "PSK_WITH_AES_128_CCM": "PSK-AES128-CCM",
+    "PSK_WITH_AES_256_CCM": "PSK-AES256-CCM",
+    "DHE_PSK_WITH_AES_128_CCM": "DHE-PSK-AES128-CCM",
+    "DHE_PSK_WITH_AES_256_CCM": "DHE-PSK-AES256-CCM",
+    "PSK_WITH_AES_128_CCM_8": "PSK-AES128-CCM8",
+    "PSK_WITH_AES_256_CCM_8": "PSK-AES256-CCM8",
+    "DHE_PSK_WITH_AES_128_CCM_8": "DHE-PSK-AES128-CCM8",
+    "DHE_PSK_WITH_AES_256_CCM_8": "DHE-PSK-AES256-CCM8",
+
+    # ChaCha20-Poly1305 cipher suites, extending TLS v1.2
+    "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256": "ECDHE-RSA-CHACHA20-POLY1305",
+    "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256": "ECDHE-ECDSA-CHACHA20-POLY1305",
+    "TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256": "DHE-RSA-CHACHA20-POLY1305",
+    "TLS_PSK_WITH_CHACHA20_POLY1305_SHA256": "PSK-CHACHA20-POLY1305",
+    "TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256": "ECDHE-PSK-CHACHA20-POLY1305",
+    "TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256": "DHE-PSK-CHACHA20-POLY1305",
+    "TLS_RSA_PSK_WITH_CHACHA20_POLY1305_SHA256": "RSA-PSK-CHACHA20-POLY1305"}
+
+# TLS v1.3 cipher suites IANI to OpenSSL name translation
+TLSV1_3_CIPHER_SUITES = {
+    "TLS_AES_128_GCM_SHA256": "TLS_AES_128_GCM_SHA256",
+    "TLS_AES_256_GCM_SHA384": "TLS_AES_256_GCM_SHA384",
+    "TLS_CHACHA20_POLY1305_SHA256": "TLS_CHACHA20_POLY1305_SHA256",
+    "TLS_AES_128_CCM_SHA256": "TLS_AES_128_CCM_SHA256",
+    "TLS_AES_128_CCM_8_SHA256": "TLS_AES_128_CCM_8_SHA256"}
+
+TLS_CIPHER_SUITES = {
+    "TLSv1": TLSV1_CIPHER_SUITES,
+    "TLSv1.1": TLSV1_1_CIPHER_SUITES,
+    "TLSv1.2": TLSV1_2_CIPHER_SUITES,
+    "TLSv1.3": TLSV1_3_CIPHER_SUITES}
+
+OPENSSL_CS_NAMES = {
+    "TLSv1": TLSV1_CIPHER_SUITES.values(),
+    "TLSv1.1": TLSV1_1_CIPHER_SUITES.values(),
+    "TLSv1.2": TLSV1_2_CIPHER_SUITES.values(),
+    "TLSv1.3": TLSV1_3_CIPHER_SUITES.values()}
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/crud.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/crud.py
new file mode 100644
index 0000000..d5bd733
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/crud.py
@@ -0,0 +1,713 @@
+# Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementation of the CRUD database objects."""
+
+import json
+import warnings
+
+from .dbdoc import DbDoc
+from .compat import STRING_TYPES
+from .errorcode import (ER_NO_SUCH_TABLE, ER_TABLE_EXISTS_ERROR,
+                        ER_X_CMD_NUM_ARGUMENTS, ER_X_INVALID_ADMIN_COMMAND)
+from .errors import NotSupportedError, OperationalError, ProgrammingError
+from .helpers import deprecated, escape, quote_identifier
+from .statement import (FindStatement, AddStatement, RemoveStatement,
+                        ModifyStatement, SelectStatement, InsertStatement,
+                        DeleteStatement, UpdateStatement,
+                        CreateCollectionIndexStatement)
+
+
+_COUNT_VIEWS_QUERY = ("SELECT COUNT(*) FROM information_schema.views "
+                      "WHERE table_schema = '{0}' AND table_name = '{1}'")
+_COUNT_TABLES_QUERY = ("SELECT COUNT(*) FROM information_schema.tables "
+                       "WHERE table_schema = '{0}' AND table_name = '{1}'")
+_COUNT_SCHEMAS_QUERY = ("SELECT COUNT(*) FROM information_schema.schemata "
+                        "WHERE schema_name = '{0}'")
+_COUNT_QUERY = "SELECT COUNT(*) FROM {0}.{1}"
+_DROP_TABLE_QUERY = "DROP TABLE IF EXISTS {0}.{1}"
+
+
+class DatabaseObject(object):
+    """Provides base functionality for database objects.
+
+    Args:
+        schema (mysqlx.Schema): The Schema object.
+        name (str): The database object name.
+    """
+    def __init__(self, schema, name):
+        self._schema = schema
+        self._name = name
+        self._session = self._schema.get_session()
+        self._connection = self._session.get_connection()
+
+    @property
+    def session(self):
+        """:class:`mysqlx.Session`: The Session object.
+        """
+        return self._session
+
+    @property
+    def schema(self):
+        """:class:`mysqlx.Schema`: The Schema object.
+        """
+        return self._schema
+
+    @property
+    def name(self):
+        """str: The name of this database object.
+        """
+        return self._name
+
+    def get_connection(self):
+        """Returns the underlying connection.
+
+        Returns:
+            mysqlx.connection.Connection: The connection object.
+        """
+        return self._connection
+
+    def get_session(self):
+        """Returns the session of this database object.
+
+        Returns:
+            mysqlx.Session: The Session object.
+        """
+        return self._session
+
+    def get_schema(self):
+        """Returns the Schema object of this database object.
+
+        Returns:
+            mysqlx.Schema: The Schema object.
+        """
+        return self._schema
+
+    def get_name(self):
+        """Returns the name of this database object.
+
+        Returns:
+            str: The name of this database object.
+        """
+        return self._name
+
+    def exists_in_database(self):
+        """Verifies if this object exists in the database.
+
+        Returns:
+            bool: `True` if object exists in database.
+
+        Raises:
+           NotImplementedError: This method must be implemented.
+        """
+        raise NotImplementedError
+
+    @deprecated("8.0.12", "Use 'exists_in_database()' method instead")
+    def am_i_real(self):
+        """Verifies if this object exists in the database.
+
+        Returns:
+            bool: `True` if object exists in database.
+
+        Raises:
+           NotImplementedError: This method must be implemented.
+
+        .. deprecated:: 8.0.12
+           Use ``exists_in_database()`` method instead.
+        """
+        return self.exists_in_database()
+
+    @deprecated("8.0.12", "Use 'get_name()' method instead")
+    def who_am_i(self):
+        """Returns the name of this database object.
+
+        Returns:
+            str: The name of this database object.
+
+        .. deprecated:: 8.0.12
+           Use ``get_name()`` method instead.
+        """
+        return self.get_name()
+
+
+class Schema(DatabaseObject):
+    """A client-side representation of a database schema. Provides access to
+    the schema contents.
+
+    Args:
+        session (mysqlx.XSession): Session object.
+        name (str): The Schema name.
+    """
+    def __init__(self, session, name):
+        self._session = session
+        super(Schema, self).__init__(self, name)
+
+    def exists_in_database(self):
+        """Verifies if this object exists in the database.
+
+        Returns:
+            bool: `True` if object exists in database.
+        """
+        sql = _COUNT_SCHEMAS_QUERY.format(escape(self._name))
+        return self._connection.execute_sql_scalar(sql) == 1
+
+    def get_collections(self):
+        """Returns a list of collections for this schema.
+
+        Returns:
+            `list`: List of Collection objects.
+        """
+        rows = self._connection.get_row_result("list_objects",
+                                               {"schema": self._name})
+        rows.fetch_all()
+        collections = []
+        for row in rows:
+            if row["type"] != "COLLECTION":
+                continue
+            try:
+                collection = Collection(self, row["TABLE_NAME"])
+            except ValueError:
+                collection = Collection(self, row["name"])
+            collections.append(collection)
+        return collections
+
+    def get_collection_as_table(self, name, check_existence=False):
+        """Returns a a table object for the given collection
+
+        Returns:
+            mysqlx.Table: Table object.
+
+        """
+        return self.get_table(name, check_existence)
+
+    def get_tables(self):
+        """Returns a list of tables for this schema.
+
+        Returns:
+            `list`: List of Table objects.
+        """
+        rows = self._connection.get_row_result("list_objects",
+                                               {"schema": self._name})
+        rows.fetch_all()
+        tables = []
+        object_types = ("TABLE", "VIEW",)
+        for row in rows:
+            if row["type"] in object_types:
+                try:
+                    table = Table(self, row["TABLE_NAME"])
+                except ValueError:
+                    table = Table(self, row["name"])
+                tables.append(table)
+        return tables
+
+    def get_table(self, name, check_existence=False):
+        """Returns the table of the given name for this schema.
+
+        Returns:
+            mysqlx.Table: Table object.
+        """
+        table = Table(self, name)
+        if check_existence:
+            if not table.exists_in_database():
+                raise ProgrammingError("Table does not exist")
+        return table
+
+    def get_view(self, name, check_existence=False):
+        """Returns the view of the given name for this schema.
+
+        Returns:
+            mysqlx.View: View object.
+        """
+        view = View(self, name)
+        if check_existence:
+            if not view.exists_in_database():
+                raise ProgrammingError("View does not exist")
+        return view
+
+    def get_collection(self, name, check_existence=False):
+        """Returns the collection of the given name for this schema.
+
+        Returns:
+            mysqlx.Collection: Collection object.
+        """
+        collection = Collection(self, name)
+        if check_existence:
+            if not collection.exists_in_database():
+                raise ProgrammingError("Collection does not exist")
+        return collection
+
+    def drop_collection(self, name):
+        """Drops a collection.
+
+        Args:
+            name (str): The name of the collection to be dropped.
+        """
+        self._connection.execute_nonquery(
+            "sql", _DROP_TABLE_QUERY.format(quote_identifier(self._name),
+                                            quote_identifier(name)), False)
+
+    def create_collection(self, name, reuse_existing=False, validation=None,
+                          **kwargs):
+        """Creates in the current schema a new collection with the specified
+        name and retrieves an object representing the new collection created.
+
+        Args:
+            name (str): The name of the collection.
+            reuse_existing (bool): `True` to reuse an existing collection.
+            validation (Optional[dict]): A dict, containing the keys `level`
+                                         with the validation level and `schema`
+                                         with a dict or a string representation
+                                         of a JSON schema specification.
+
+        Returns:
+            mysqlx.Collection: Collection object.
+
+        Raises:
+            :class:`mysqlx.ProgrammingError`: If ``reuse_existing`` is False
+                                              and collection exists or the
+                                              collection name is invalid.
+            :class:`mysqlx.NotSupportedError`: If schema validation is not
+                                               supported by the server.
+
+        .. versionchanged:: 8.0.21
+        """
+        if not name:
+            raise ProgrammingError("Collection name is invalid")
+
+        if "reuse" in kwargs:
+            warnings.warn("'reuse' is deprecated since 8.0.21. "
+                          "Please use 'reuse_existing' instead",
+                          DeprecationWarning)
+            reuse_existing = kwargs["reuse"]
+
+        collection = Collection(self, name)
+        fields = {"schema": self._name, "name": name}
+
+        if validation is not None:
+            if not isinstance(validation, dict) or not validation:
+                raise ProgrammingError("Invalid value for 'validation'")
+
+            valid_options = ("level", "schema")
+            for option in validation:
+                if option not in valid_options:
+                    raise ProgrammingError("Invalid option in 'validation': {}"
+                                           "".format(option))
+
+            options = []
+
+            if "level" in validation:
+                level = validation["level"]
+                if not isinstance(level, str):
+                    raise ProgrammingError("Invalid value for 'level'")
+                options.append(("level", level))
+
+            if "schema" in validation:
+                schema = validation["schema"]
+                if not isinstance(schema, (str, dict)):
+                    raise ProgrammingError("Invalid value for 'schema'")
+                options.append(
+                    ("schema", json.dumps(schema)
+                               if isinstance(schema, dict) else schema))
+
+            fields["options"] = ("validation", options)
+
+        try:
+            self._connection.execute_nonquery(
+                "mysqlx", "create_collection", True, fields)
+        except OperationalError as err:
+            if err.errno == ER_X_CMD_NUM_ARGUMENTS:
+                raise NotSupportedError(
+                    "Your MySQL server does not support the requested "
+                    "operation. Please update to MySQL 8.0.19 or a later "
+                    "version")
+            if err.errno == ER_TABLE_EXISTS_ERROR:
+                if not reuse_existing:
+                    raise ProgrammingError(
+                        "Collection '{}' already exists".format(name))
+            else:
+                raise ProgrammingError(err.msg, err.errno)
+
+        return collection
+
+    def modify_collection(self, name, validation=None):
+        """Modifies a collection using a JSON schema validation.
+
+        Args:
+            name (str): The name of the collection.
+            validation (Optional[dict]): A dict, containing the keys `level`
+                                         with the validation level and `schema`
+                                         with a dict or a string representation
+                                         of a JSON schema specification.
+
+        Raises:
+            :class:`mysqlx.ProgrammingError`: If the collection name or
+                                              validation is invalid.
+            :class:`mysqlx.NotSupportedError`: If schema validation is not
+                                               supported by the server.
+
+        .. versionadded:: 8.0.21
+        """
+        if not name:
+            raise ProgrammingError("Collection name is invalid")
+
+        if not isinstance(validation, dict) or not validation:
+            raise ProgrammingError("Invalid value for 'validation'")
+
+        valid_options = ("level", "schema")
+        for option in validation:
+            if option not in valid_options:
+                raise ProgrammingError("Invalid option in 'validation': {}"
+                                       "".format(option))
+        options = []
+
+        if "level" in validation:
+            level = validation["level"]
+            if not isinstance(level, str):
+                raise ProgrammingError("Invalid value for 'level'")
+            options.append(("level", level))
+
+        if "schema" in validation:
+            schema = validation["schema"]
+            if not isinstance(schema, (str, dict)):
+                raise ProgrammingError("Invalid value for 'schema'")
+            options.append(
+                ("schema", json.dumps(schema)
+                           if isinstance(schema, dict) else schema))
+
+        fields = {
+            "schema": self._name,
+            "name": name,
+            "options": ("validation", options)
+        }
+
+        try:
+            self._connection.execute_nonquery(
+                "mysqlx", "modify_collection_options", True, fields)
+        except OperationalError as err:
+            if err.errno == ER_X_INVALID_ADMIN_COMMAND:
+                raise NotSupportedError(
+                    "Your MySQL server does not support the requested "
+                    "operation. Please update to MySQL 8.0.19 or a later "
+                    "version")
+            raise ProgrammingError(err.msg, err.errno)
+
+
+class Collection(DatabaseObject):
+    """Represents a collection of documents on a schema.
+
+    Args:
+        schema (mysqlx.Schema): The Schema object.
+        name (str): The collection name.
+    """
+
+    def exists_in_database(self):
+        """Verifies if this object exists in the database.
+
+        Returns:
+            bool: `True` if object exists in database.
+        """
+        sql = _COUNT_TABLES_QUERY.format(escape(self._schema.name),
+                                         escape(self._name))
+        return self._connection.execute_sql_scalar(sql) == 1
+
+    def find(self, condition=None):
+        """Retrieves documents from a collection.
+
+        Args:
+            condition (Optional[str]): The string with the filter expression of
+                                       the documents to be retrieved.
+        """
+        stmt = FindStatement(self, condition)
+        stmt.stmt_id = self._connection.get_next_statement_id()
+        return stmt
+
+    def add(self, *values):
+        """Adds a list of documents to a collection.
+
+        Args:
+            *values: The document list to be added into the collection.
+
+        Returns:
+            mysqlx.AddStatement: AddStatement object.
+        """
+        return AddStatement(self).add(*values)
+
+    def remove(self, condition):
+        """Removes documents based on the ``condition``.
+
+        Args:
+            condition (str): The string with the filter expression of the
+                             documents to be removed.
+
+        Returns:
+            mysqlx.RemoveStatement: RemoveStatement object.
+
+        .. versionchanged:: 8.0.12
+           The ``condition`` parameter is now mandatory.
+        """
+        stmt = RemoveStatement(self, condition)
+        stmt.stmt_id = self._connection.get_next_statement_id()
+        return stmt
+
+    def modify(self, condition):
+        """Modifies documents based on the ``condition``.
+
+        Args:
+            condition (str): The string with the filter expression of the
+                             documents to be modified.
+
+        Returns:
+            mysqlx.ModifyStatement: ModifyStatement object.
+
+        .. versionchanged:: 8.0.12
+           The ``condition`` parameter is now mandatory.
+        """
+        stmt = ModifyStatement(self, condition)
+        stmt.stmt_id = self._connection.get_next_statement_id()
+        return stmt
+
+    def count(self):
+        """Counts the documents in the collection.
+
+        Returns:
+            int: The total of documents in the collection.
+        """
+        sql = _COUNT_QUERY.format(quote_identifier(self._schema.name),
+                                  quote_identifier(self._name))
+        try:
+            res = self._connection.execute_sql_scalar(sql)
+        except OperationalError as err:
+            if err.errno == ER_NO_SUCH_TABLE:
+                raise OperationalError(
+                    "Collection '{}' does not exist in schema '{}'"
+                    "".format(self._name, self._schema.name))
+            raise
+        return res
+
+    def create_index(self, index_name, fields_desc):
+        """Creates a collection index.
+
+        Args:
+            index_name (str): Index name.
+            fields_desc (dict): A dictionary containing the fields members that
+                                constraints the index to be created. It must
+                                have the form as shown in the following::
+
+                                   {"fields": [{"field": member_path,
+                                                "type": member_type,
+                                                "required": member_required,
+                                                "array": array,
+                                                "collation": collation,
+                                                "options": options,
+                                                "srid": srid},
+                                                # {... more members,
+                                                #      repeated as many times
+                                                #      as needed}
+                                                ],
+                                    "type": type}
+        """
+        return CreateCollectionIndexStatement(self, index_name, fields_desc)
+
+    def drop_index(self, index_name):
+        """Drops a collection index.
+
+        Args:
+            index_name (str): Index name.
+        """
+        self._connection.execute_nonquery("mysqlx", "drop_collection_index",
+                                          False, {"schema": self._schema.name,
+                                                  "collection": self._name,
+                                                  "name": index_name})
+
+    def replace_one(self, doc_id, doc):
+        """Replaces the Document matching the document ID with a new document
+        provided.
+
+        Args:
+            doc_id (str): Document ID
+            doc (:class:`mysqlx.DbDoc` or `dict`): New Document
+        """
+        return self.modify("_id = :id").set("$", doc) \
+                   .bind("id", doc_id).execute()
+
+    def add_or_replace_one(self, doc_id, doc):
+        """Upserts the Document matching the document ID with a new document
+        provided.
+
+        Args:
+            doc_id (str): Document ID
+            doc (:class:`mysqlx.DbDoc` or dict): New Document
+        """
+        if not isinstance(doc, DbDoc):
+            doc = DbDoc(doc)
+        return self.add(doc.copy(doc_id)).upsert(True).execute()
+
+    def get_one(self, doc_id):
+        """Returns a Document matching the Document ID.
+
+        Args:
+            doc_id (str): Document ID
+
+        Returns:
+            mysqlx.DbDoc: The Document matching the Document ID.
+        """
+        result = self.find("_id = :id").bind("id", doc_id).execute()
+        doc = result.fetch_one()
+        self._connection.fetch_active_result()
+        return doc
+
+    def remove_one(self, doc_id):
+        """Removes a Document matching the Document ID.
+
+        Args:
+            doc_id (str): Document ID
+
+        Returns:
+            mysqlx.Result: Result object.
+        """
+        return self.remove("_id = :id").bind("id", doc_id).execute()
+
+
+class Table(DatabaseObject):
+    """Represents a database table on a schema.
+
+    Provides access to the table through standard INSERT/SELECT/UPDATE/DELETE
+    statements.
+
+    Args:
+        schema (mysqlx.Schema): The Schema object.
+        name (str): The table name.
+    """
+
+    def exists_in_database(self):
+        """Verifies if this object exists in the database.
+
+        Returns:
+            bool: `True` if object exists in database.
+        """
+        sql = _COUNT_TABLES_QUERY.format(escape(self._schema.name),
+                                         escape(self._name))
+        return self._connection.execute_sql_scalar(sql) == 1
+
+    def select(self, *fields):
+        """Creates a new :class:`mysqlx.SelectStatement` object.
+
+        Args:
+            *fields: The fields to be retrieved.
+
+        Returns:
+            mysqlx.SelectStatement: SelectStatement object
+        """
+        stmt = SelectStatement(self, *fields)
+        stmt.stmt_id = self._connection.get_next_statement_id()
+        return stmt
+
+    def insert(self, *fields):
+        """Creates a new :class:`mysqlx.InsertStatement` object.
+
+        Args:
+            *fields: The fields to be inserted.
+
+        Returns:
+            mysqlx.InsertStatement: InsertStatement object
+        """
+        stmt = InsertStatement(self, *fields)
+        stmt.stmt_id = self._connection.get_next_statement_id()
+        return stmt
+
+    def update(self):
+        """Creates a new :class:`mysqlx.UpdateStatement` object.
+
+        Returns:
+            mysqlx.UpdateStatement: UpdateStatement object
+        """
+        stmt = UpdateStatement(self)
+        stmt.stmt_id = self._connection.get_next_statement_id()
+        return stmt
+
+    def delete(self):
+        """Creates a new :class:`mysqlx.DeleteStatement` object.
+
+        Returns:
+            mysqlx.DeleteStatement: DeleteStatement object
+
+        .. versionchanged:: 8.0.12
+           The ``condition`` parameter was removed.
+        """
+        stmt = DeleteStatement(self)
+        stmt.stmt_id = self._connection.get_next_statement_id()
+        return stmt
+
+    def count(self):
+        """Counts the rows in the table.
+
+        Returns:
+            int: The total of rows in the table.
+        """
+        sql = _COUNT_QUERY.format(quote_identifier(self._schema.name),
+                                  quote_identifier(self._name))
+        try:
+            res = self._connection.execute_sql_scalar(sql)
+        except OperationalError as err:
+            if err.errno == ER_NO_SUCH_TABLE:
+                raise OperationalError(
+                    "Table '{}' does not exist in schema '{}'"
+                    "".format(self._name, self._schema.name))
+            raise
+        return res
+
+    def is_view(self):
+        """Determine if the underlying object is a view or not.
+
+        Returns:
+            bool: `True` if the underlying object is a view.
+        """
+        sql = _COUNT_VIEWS_QUERY.format(escape(self._schema.name),
+                                        escape(self._name))
+        return self._connection.execute_sql_scalar(sql) == 1
+
+
+class View(Table):
+    """Represents a database view on a schema.
+
+    Provides a mechanism for creating, alter and drop views.
+
+    Args:
+        schema (mysqlx.Schema): The Schema object.
+        name (str): The table name.
+    """
+
+    def exists_in_database(self):
+        """Verifies if this object exists in the database.
+
+        Returns:
+            bool: `True` if object exists in database.
+        """
+        sql = _COUNT_VIEWS_QUERY.format(escape(self._schema.name),
+                                        escape(self._name))
+        return self._connection.execute_sql_scalar(sql) == 1
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/dbdoc.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/dbdoc.py
new file mode 100644
index 0000000..c350da5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/dbdoc.py
@@ -0,0 +1,112 @@
+# Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementation of the DbDoc."""
+
+import json
+
+from .compat import STRING_TYPES
+from .errors import ProgrammingError
+
+
+class ExprJSONEncoder(json.JSONEncoder):
+    """A :class:`json.JSONEncoder` subclass, which enables encoding of
+    :class:`mysqlx.ExprParser` objects."""
+    def default(self, o):  # pylint: disable=E0202
+        if hasattr(o, "expr"):
+            return "{0}".format(o)
+        # Let the base class default method raise the TypeError
+        return json.JSONEncoder.default(self, o)
+
+
+class DbDoc(object):
+    """Represents a generic document in JSON format.
+
+    Args:
+        value (object): The value can be a JSON string or a dict.
+
+    Raises:
+        ValueError: If ``value`` type is not a basestring or dict.
+    """
+    def __init__(self, value):
+        if isinstance(value, dict):
+            self.__dict__ = value
+        elif isinstance(value, STRING_TYPES):
+            self.__dict__ = json.loads(value)
+        else:
+            raise ValueError("Unable to handle type: {0}".format(type(value)))
+
+    def __str__(self):
+        return self.as_str()
+
+    def __repr__(self):
+        return repr(self.__dict__)
+
+    def __setitem__(self, index, value):
+        if index == "_id":
+            raise ProgrammingError("Cannot modify _id")
+        self.__dict__[index] = value
+
+    def __getitem__(self, index):
+        return self.__dict__[index]
+
+    def copy(self, doc_id=None):
+        """Returns a new copy of a :class:`mysqlx.DbDoc` object containing the
+        `doc_id` provided. If `doc_id` is not provided, it will be removed from
+        new :class:`mysqlx.DbDoc` object.
+
+        Args:
+            doc_id (Optional[str]): Document ID
+
+        Returns:
+            mysqlx.DbDoc: A new instance of DbDoc containing the _id provided
+        """
+        new_dict = self.__dict__.copy()
+        if doc_id:
+            new_dict["_id"] = doc_id
+        elif "_id" in new_dict:
+            del new_dict["_id"]
+        return DbDoc(new_dict)
+
+    def keys(self):
+        """Returns the keys.
+
+        Returns:
+            `list`: The keys.
+        """
+        return self.__dict__.keys()
+
+    def as_str(self):
+        """Serialize :class:`mysqlx.DbDoc` to a JSON formatted ``str``.
+
+        Returns:
+            str: A JSON formatted ``str`` representation of the document.
+
+        .. versionadded:: 8.0.16
+        """
+        return json.dumps(self.__dict__, cls=ExprJSONEncoder)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/errorcode.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/errorcode.py
new file mode 100644
index 0000000..bdd7344
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/errorcode.py
@@ -0,0 +1,4683 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2013, 2020, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# This file was auto-generated.
+_GENERATED_ON = '2018-03-16'
+_MYSQL_VERSION = (8, 0, 11)
+
+"""This module contains the MySQL Server and Client error codes"""
+
+# Start MySQL Errors
+OBSOLETE_ER_HASHCHK = 1000
+OBSOLETE_ER_NISAMCHK = 1001
+ER_NO = 1002
+ER_YES = 1003
+ER_CANT_CREATE_FILE = 1004
+ER_CANT_CREATE_TABLE = 1005
+ER_CANT_CREATE_DB = 1006
+ER_DB_CREATE_EXISTS = 1007
+ER_DB_DROP_EXISTS = 1008
+OBSOLETE_ER_DB_DROP_DELETE = 1009
+ER_DB_DROP_RMDIR = 1010
+OBSOLETE_ER_CANT_DELETE_FILE = 1011
+ER_CANT_FIND_SYSTEM_REC = 1012
+ER_CANT_GET_STAT = 1013
+OBSOLETE_ER_CANT_GET_WD = 1014
+ER_CANT_LOCK = 1015
+ER_CANT_OPEN_FILE = 1016
+ER_FILE_NOT_FOUND = 1017
+ER_CANT_READ_DIR = 1018
+OBSOLETE_ER_CANT_SET_WD = 1019
+ER_CHECKREAD = 1020
+OBSOLETE_ER_DISK_FULL = 1021
+ER_DUP_KEY = 1022
+OBSOLETE_ER_ERROR_ON_CLOSE = 1023
+ER_ERROR_ON_READ = 1024
+ER_ERROR_ON_RENAME = 1025
+ER_ERROR_ON_WRITE = 1026
+ER_FILE_USED = 1027
+ER_FILSORT_ABORT = 1028
+OBSOLETE_ER_FORM_NOT_FOUND = 1029
+ER_GET_ERRNO = 1030
+ER_ILLEGAL_HA = 1031
+ER_KEY_NOT_FOUND = 1032
+ER_NOT_FORM_FILE = 1033
+ER_NOT_KEYFILE = 1034
+ER_OLD_KEYFILE = 1035
+ER_OPEN_AS_READONLY = 1036
+ER_OUTOFMEMORY = 1037
+ER_OUT_OF_SORTMEMORY = 1038
+OBSOLETE_ER_UNEXPECTED_EOF = 1039
+ER_CON_COUNT_ERROR = 1040
+ER_OUT_OF_RESOURCES = 1041
+ER_BAD_HOST_ERROR = 1042
+ER_HANDSHAKE_ERROR = 1043
+ER_DBACCESS_DENIED_ERROR = 1044
+ER_ACCESS_DENIED_ERROR = 1045
+ER_NO_DB_ERROR = 1046
+ER_UNKNOWN_COM_ERROR = 1047
+ER_BAD_NULL_ERROR = 1048
+ER_BAD_DB_ERROR = 1049
+ER_TABLE_EXISTS_ERROR = 1050
+ER_BAD_TABLE_ERROR = 1051
+ER_NON_UNIQ_ERROR = 1052
+ER_SERVER_SHUTDOWN = 1053
+ER_BAD_FIELD_ERROR = 1054
+ER_WRONG_FIELD_WITH_GROUP = 1055
+ER_WRONG_GROUP_FIELD = 1056
+ER_WRONG_SUM_SELECT = 1057
+ER_WRONG_VALUE_COUNT = 1058
+ER_TOO_LONG_IDENT = 1059
+ER_DUP_FIELDNAME = 1060
+ER_DUP_KEYNAME = 1061
+ER_DUP_ENTRY = 1062
+ER_WRONG_FIELD_SPEC = 1063
+ER_PARSE_ERROR = 1064
+ER_EMPTY_QUERY = 1065
+ER_NONUNIQ_TABLE = 1066
+ER_INVALID_DEFAULT = 1067
+ER_MULTIPLE_PRI_KEY = 1068
+ER_TOO_MANY_KEYS = 1069
+ER_TOO_MANY_KEY_PARTS = 1070
+ER_TOO_LONG_KEY = 1071
+ER_KEY_COLUMN_DOES_NOT_EXITS = 1072
+ER_BLOB_USED_AS_KEY = 1073
+ER_TOO_BIG_FIELDLENGTH = 1074
+ER_WRONG_AUTO_KEY = 1075
+ER_READY = 1076
+OBSOLETE_ER_NORMAL_SHUTDOWN = 1077
+OBSOLETE_ER_GOT_SIGNAL = 1078
+ER_SHUTDOWN_COMPLETE = 1079
+ER_FORCING_CLOSE = 1080
+ER_IPSOCK_ERROR = 1081
+ER_NO_SUCH_INDEX = 1082
+ER_WRONG_FIELD_TERMINATORS = 1083
+ER_BLOBS_AND_NO_TERMINATED = 1084
+ER_TEXTFILE_NOT_READABLE = 1085
+ER_FILE_EXISTS_ERROR = 1086
+ER_LOAD_INFO = 1087
+ER_ALTER_INFO = 1088
+ER_WRONG_SUB_KEY = 1089
+ER_CANT_REMOVE_ALL_FIELDS = 1090
+ER_CANT_DROP_FIELD_OR_KEY = 1091
+ER_INSERT_INFO = 1092
+ER_UPDATE_TABLE_USED = 1093
+ER_NO_SUCH_THREAD = 1094
+ER_KILL_DENIED_ERROR = 1095
+ER_NO_TABLES_USED = 1096
+ER_TOO_BIG_SET = 1097
+ER_NO_UNIQUE_LOGFILE = 1098
+ER_TABLE_NOT_LOCKED_FOR_WRITE = 1099
+ER_TABLE_NOT_LOCKED = 1100
+ER_BLOB_CANT_HAVE_DEFAULT = 1101
+ER_WRONG_DB_NAME = 1102
+ER_WRONG_TABLE_NAME = 1103
+ER_TOO_BIG_SELECT = 1104
+ER_UNKNOWN_ERROR = 1105
+ER_UNKNOWN_PROCEDURE = 1106
+ER_WRONG_PARAMCOUNT_TO_PROCEDURE = 1107
+ER_WRONG_PARAMETERS_TO_PROCEDURE = 1108
+ER_UNKNOWN_TABLE = 1109
+ER_FIELD_SPECIFIED_TWICE = 1110
+ER_INVALID_GROUP_FUNC_USE = 1111
+ER_UNSUPPORTED_EXTENSION = 1112
+ER_TABLE_MUST_HAVE_COLUMNS = 1113
+ER_RECORD_FILE_FULL = 1114
+ER_UNKNOWN_CHARACTER_SET = 1115
+ER_TOO_MANY_TABLES = 1116
+ER_TOO_MANY_FIELDS = 1117
+ER_TOO_BIG_ROWSIZE = 1118
+ER_STACK_OVERRUN = 1119
+ER_WRONG_OUTER_JOIN_UNUSED = 1120
+ER_NULL_COLUMN_IN_INDEX = 1121
+ER_CANT_FIND_UDF = 1122
+ER_CANT_INITIALIZE_UDF = 1123
+ER_UDF_NO_PATHS = 1124
+ER_UDF_EXISTS = 1125
+ER_CANT_OPEN_LIBRARY = 1126
+ER_CANT_FIND_DL_ENTRY = 1127
+ER_FUNCTION_NOT_DEFINED = 1128
+ER_HOST_IS_BLOCKED = 1129
+ER_HOST_NOT_PRIVILEGED = 1130
+ER_PASSWORD_ANONYMOUS_USER = 1131
+ER_PASSWORD_NOT_ALLOWED = 1132
+ER_PASSWORD_NO_MATCH = 1133
+ER_UPDATE_INFO = 1134
+ER_CANT_CREATE_THREAD = 1135
+ER_WRONG_VALUE_COUNT_ON_ROW = 1136
+ER_CANT_REOPEN_TABLE = 1137
+ER_INVALID_USE_OF_NULL = 1138
+ER_REGEXP_ERROR = 1139
+ER_MIX_OF_GROUP_FUNC_AND_FIELDS = 1140
+ER_NONEXISTING_GRANT = 1141
+ER_TABLEACCESS_DENIED_ERROR = 1142
+ER_COLUMNACCESS_DENIED_ERROR = 1143
+ER_ILLEGAL_GRANT_FOR_TABLE = 1144
+ER_GRANT_WRONG_HOST_OR_USER = 1145
+ER_NO_SUCH_TABLE = 1146
+ER_NONEXISTING_TABLE_GRANT = 1147
+ER_NOT_ALLOWED_COMMAND = 1148
+ER_SYNTAX_ERROR = 1149
+OBSOLETE_ER_UNUSED1 = 1150
+OBSOLETE_ER_UNUSED2 = 1151
+ER_ABORTING_CONNECTION = 1152
+ER_NET_PACKET_TOO_LARGE = 1153
+ER_NET_READ_ERROR_FROM_PIPE = 1154
+ER_NET_FCNTL_ERROR = 1155
+ER_NET_PACKETS_OUT_OF_ORDER = 1156
+ER_NET_UNCOMPRESS_ERROR = 1157
+ER_NET_READ_ERROR = 1158
+ER_NET_READ_INTERRUPTED = 1159
+ER_NET_ERROR_ON_WRITE = 1160
+ER_NET_WRITE_INTERRUPTED = 1161
+ER_TOO_LONG_STRING = 1162
+ER_TABLE_CANT_HANDLE_BLOB = 1163
+ER_TABLE_CANT_HANDLE_AUTO_INCREMENT = 1164
+OBSOLETE_ER_UNUSED3 = 1165
+ER_WRONG_COLUMN_NAME = 1166
+ER_WRONG_KEY_COLUMN = 1167
+ER_WRONG_MRG_TABLE = 1168
+ER_DUP_UNIQUE = 1169
+ER_BLOB_KEY_WITHOUT_LENGTH = 1170
+ER_PRIMARY_CANT_HAVE_NULL = 1171
+ER_TOO_MANY_ROWS = 1172
+ER_REQUIRES_PRIMARY_KEY = 1173
+OBSOLETE_ER_NO_RAID_COMPILED = 1174
+ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE = 1175
+ER_KEY_DOES_NOT_EXITS = 1176
+ER_CHECK_NO_SUCH_TABLE = 1177
+ER_CHECK_NOT_IMPLEMENTED = 1178
+ER_CANT_DO_THIS_DURING_AN_TRANSACTION = 1179
+ER_ERROR_DURING_COMMIT = 1180
+ER_ERROR_DURING_ROLLBACK = 1181
+ER_ERROR_DURING_FLUSH_LOGS = 1182
+OBSOLETE_ER_ERROR_DURING_CHECKPOINT = 1183
+ER_NEW_ABORTING_CONNECTION = 1184
+OBSOLETE_ER_DUMP_NOT_IMPLEMENTED = 1185
+OBSOLETE_ER_FLUSH_MASTER_BINLOG_CLOSED = 1186
+OBSOLETE_ER_INDEX_REBUILD = 1187
+ER_MASTER = 1188
+ER_MASTER_NET_READ = 1189
+ER_MASTER_NET_WRITE = 1190
+ER_FT_MATCHING_KEY_NOT_FOUND = 1191
+ER_LOCK_OR_ACTIVE_TRANSACTION = 1192
+ER_UNKNOWN_SYSTEM_VARIABLE = 1193
+ER_CRASHED_ON_USAGE = 1194
+ER_CRASHED_ON_REPAIR = 1195
+ER_WARNING_NOT_COMPLETE_ROLLBACK = 1196
+ER_TRANS_CACHE_FULL = 1197
+OBSOLETE_ER_SLAVE_MUST_STOP = 1198
+ER_SLAVE_NOT_RUNNING = 1199
+ER_BAD_SLAVE = 1200
+ER_MASTER_INFO = 1201
+ER_SLAVE_THREAD = 1202
+ER_TOO_MANY_USER_CONNECTIONS = 1203
+ER_SET_CONSTANTS_ONLY = 1204
+ER_LOCK_WAIT_TIMEOUT = 1205
+ER_LOCK_TABLE_FULL = 1206
+ER_READ_ONLY_TRANSACTION = 1207
+OBSOLETE_ER_DROP_DB_WITH_READ_LOCK = 1208
+OBSOLETE_ER_CREATE_DB_WITH_READ_LOCK = 1209
+ER_WRONG_ARGUMENTS = 1210
+ER_NO_PERMISSION_TO_CREATE_USER = 1211
+OBSOLETE_ER_UNION_TABLES_IN_DIFFERENT_DIR = 1212
+ER_LOCK_DEADLOCK = 1213
+ER_TABLE_CANT_HANDLE_FT = 1214
+ER_CANNOT_ADD_FOREIGN = 1215
+ER_NO_REFERENCED_ROW = 1216
+ER_ROW_IS_REFERENCED = 1217
+ER_CONNECT_TO_MASTER = 1218
+OBSOLETE_ER_QUERY_ON_MASTER = 1219
+ER_ERROR_WHEN_EXECUTING_COMMAND = 1220
+ER_WRONG_USAGE = 1221
+ER_WRONG_NUMBER_OF_COLUMNS_IN_SELECT = 1222
+ER_CANT_UPDATE_WITH_READLOCK = 1223
+ER_MIXING_NOT_ALLOWED = 1224
+ER_DUP_ARGUMENT = 1225
+ER_USER_LIMIT_REACHED = 1226
+ER_SPECIFIC_ACCESS_DENIED_ERROR = 1227
+ER_LOCAL_VARIABLE = 1228
+ER_GLOBAL_VARIABLE = 1229
+ER_NO_DEFAULT = 1230
+ER_WRONG_VALUE_FOR_VAR = 1231
+ER_WRONG_TYPE_FOR_VAR = 1232
+ER_VAR_CANT_BE_READ = 1233
+ER_CANT_USE_OPTION_HERE = 1234
+ER_NOT_SUPPORTED_YET = 1235
+ER_MASTER_FATAL_ERROR_READING_BINLOG = 1236
+ER_SLAVE_IGNORED_TABLE = 1237
+ER_INCORRECT_GLOBAL_LOCAL_VAR = 1238
+ER_WRONG_FK_DEF = 1239
+ER_KEY_REF_DO_NOT_MATCH_TABLE_REF = 1240
+ER_OPERAND_COLUMNS = 1241
+ER_SUBQUERY_NO_1_ROW = 1242
+ER_UNKNOWN_STMT_HANDLER = 1243
+ER_CORRUPT_HELP_DB = 1244
+OBSOLETE_ER_CYCLIC_REFERENCE = 1245
+ER_AUTO_CONVERT = 1246
+ER_ILLEGAL_REFERENCE = 1247
+ER_DERIVED_MUST_HAVE_ALIAS = 1248
+ER_SELECT_REDUCED = 1249
+ER_TABLENAME_NOT_ALLOWED_HERE = 1250
+ER_NOT_SUPPORTED_AUTH_MODE = 1251
+ER_SPATIAL_CANT_HAVE_NULL = 1252
+ER_COLLATION_CHARSET_MISMATCH = 1253
+OBSOLETE_ER_SLAVE_WAS_RUNNING = 1254
+OBSOLETE_ER_SLAVE_WAS_NOT_RUNNING = 1255
+ER_TOO_BIG_FOR_UNCOMPRESS = 1256
+ER_ZLIB_Z_MEM_ERROR = 1257
+ER_ZLIB_Z_BUF_ERROR = 1258
+ER_ZLIB_Z_DATA_ERROR = 1259
+ER_CUT_VALUE_GROUP_CONCAT = 1260
+ER_WARN_TOO_FEW_RECORDS = 1261
+ER_WARN_TOO_MANY_RECORDS = 1262
+ER_WARN_NULL_TO_NOTNULL = 1263
+ER_WARN_DATA_OUT_OF_RANGE = 1264
+WARN_DATA_TRUNCATED = 1265
+ER_WARN_USING_OTHER_HANDLER = 1266
+ER_CANT_AGGREGATE_2COLLATIONS = 1267
+OBSOLETE_ER_DROP_USER = 1268
+ER_REVOKE_GRANTS = 1269
+ER_CANT_AGGREGATE_3COLLATIONS = 1270
+ER_CANT_AGGREGATE_NCOLLATIONS = 1271
+ER_VARIABLE_IS_NOT_STRUCT = 1272
+ER_UNKNOWN_COLLATION = 1273
+ER_SLAVE_IGNORED_SSL_PARAMS = 1274
+ER_SERVER_IS_IN_SECURE_AUTH_MODE = 1275
+ER_WARN_FIELD_RESOLVED = 1276
+ER_BAD_SLAVE_UNTIL_COND = 1277
+ER_MISSING_SKIP_SLAVE = 1278
+ER_UNTIL_COND_IGNORED = 1279
+ER_WRONG_NAME_FOR_INDEX = 1280
+ER_WRONG_NAME_FOR_CATALOG = 1281
+OBSOLETE_ER_WARN_QC_RESIZE = 1282
+ER_BAD_FT_COLUMN = 1283
+ER_UNKNOWN_KEY_CACHE = 1284
+ER_WARN_HOSTNAME_WONT_WORK = 1285
+ER_UNKNOWN_STORAGE_ENGINE = 1286
+ER_WARN_DEPRECATED_SYNTAX = 1287
+ER_NON_UPDATABLE_TABLE = 1288
+ER_FEATURE_DISABLED = 1289
+ER_OPTION_PREVENTS_STATEMENT = 1290
+ER_DUPLICATED_VALUE_IN_TYPE = 1291
+ER_TRUNCATED_WRONG_VALUE = 1292
+OBSOLETE_ER_TOO_MUCH_AUTO_TIMESTAMP_COLS = 1293
+ER_INVALID_ON_UPDATE = 1294
+ER_UNSUPPORTED_PS = 1295
+ER_GET_ERRMSG = 1296
+ER_GET_TEMPORARY_ERRMSG = 1297
+ER_UNKNOWN_TIME_ZONE = 1298
+ER_WARN_INVALID_TIMESTAMP = 1299
+ER_INVALID_CHARACTER_STRING = 1300
+ER_WARN_ALLOWED_PACKET_OVERFLOWED = 1301
+ER_CONFLICTING_DECLARATIONS = 1302
+ER_SP_NO_RECURSIVE_CREATE = 1303
+ER_SP_ALREADY_EXISTS = 1304
+ER_SP_DOES_NOT_EXIST = 1305
+ER_SP_DROP_FAILED = 1306
+ER_SP_STORE_FAILED = 1307
+ER_SP_LILABEL_MISMATCH = 1308
+ER_SP_LABEL_REDEFINE = 1309
+ER_SP_LABEL_MISMATCH = 1310
+ER_SP_UNINIT_VAR = 1311
+ER_SP_BADSELECT = 1312
+ER_SP_BADRETURN = 1313
+ER_SP_BADSTATEMENT = 1314
+ER_UPDATE_LOG_DEPRECATED_IGNORED = 1315
+ER_UPDATE_LOG_DEPRECATED_TRANSLATED = 1316
+ER_QUERY_INTERRUPTED = 1317
+ER_SP_WRONG_NO_OF_ARGS = 1318
+ER_SP_COND_MISMATCH = 1319
+ER_SP_NORETURN = 1320
+ER_SP_NORETURNEND = 1321
+ER_SP_BAD_CURSOR_QUERY = 1322
+ER_SP_BAD_CURSOR_SELECT = 1323
+ER_SP_CURSOR_MISMATCH = 1324
+ER_SP_CURSOR_ALREADY_OPEN = 1325
+ER_SP_CURSOR_NOT_OPEN = 1326
+ER_SP_UNDECLARED_VAR = 1327
+ER_SP_WRONG_NO_OF_FETCH_ARGS = 1328
+ER_SP_FETCH_NO_DATA = 1329
+ER_SP_DUP_PARAM = 1330
+ER_SP_DUP_VAR = 1331
+ER_SP_DUP_COND = 1332
+ER_SP_DUP_CURS = 1333
+ER_SP_CANT_ALTER = 1334
+ER_SP_SUBSELECT_NYI = 1335
+ER_STMT_NOT_ALLOWED_IN_SF_OR_TRG = 1336
+ER_SP_VARCOND_AFTER_CURSHNDLR = 1337
+ER_SP_CURSOR_AFTER_HANDLER = 1338
+ER_SP_CASE_NOT_FOUND = 1339
+ER_FPARSER_TOO_BIG_FILE = 1340
+ER_FPARSER_BAD_HEADER = 1341
+ER_FPARSER_EOF_IN_COMMENT = 1342
+ER_FPARSER_ERROR_IN_PARAMETER = 1343
+ER_FPARSER_EOF_IN_UNKNOWN_PARAMETER = 1344
+ER_VIEW_NO_EXPLAIN = 1345
+OBSOLETE_ER_FRM_UNKNOWN_TYPE = 1346
+ER_WRONG_OBJECT = 1347
+ER_NONUPDATEABLE_COLUMN = 1348
+OBSOLETE_ER_VIEW_SELECT_DERIVED_UNUSED = 1349
+ER_VIEW_SELECT_CLAUSE = 1350
+ER_VIEW_SELECT_VARIABLE = 1351
+ER_VIEW_SELECT_TMPTABLE = 1352
+ER_VIEW_WRONG_LIST = 1353
+ER_WARN_VIEW_MERGE = 1354
+ER_WARN_VIEW_WITHOUT_KEY = 1355
+ER_VIEW_INVALID = 1356
+ER_SP_NO_DROP_SP = 1357
+OBSOLETE_ER_SP_GOTO_IN_HNDLR = 1358
+ER_TRG_ALREADY_EXISTS = 1359
+ER_TRG_DOES_NOT_EXIST = 1360
+ER_TRG_ON_VIEW_OR_TEMP_TABLE = 1361
+ER_TRG_CANT_CHANGE_ROW = 1362
+ER_TRG_NO_SUCH_ROW_IN_TRG = 1363
+ER_NO_DEFAULT_FOR_FIELD = 1364
+ER_DIVISION_BY_ZERO = 1365
+ER_TRUNCATED_WRONG_VALUE_FOR_FIELD = 1366
+ER_ILLEGAL_VALUE_FOR_TYPE = 1367
+ER_VIEW_NONUPD_CHECK = 1368
+ER_VIEW_CHECK_FAILED = 1369
+ER_PROCACCESS_DENIED_ERROR = 1370
+ER_RELAY_LOG_FAIL = 1371
+OBSOLETE_ER_PASSWD_LENGTH = 1372
+ER_UNKNOWN_TARGET_BINLOG = 1373
+ER_IO_ERR_LOG_INDEX_READ = 1374
+ER_BINLOG_PURGE_PROHIBITED = 1375
+ER_FSEEK_FAIL = 1376
+ER_BINLOG_PURGE_FATAL_ERR = 1377
+ER_LOG_IN_USE = 1378
+ER_LOG_PURGE_UNKNOWN_ERR = 1379
+ER_RELAY_LOG_INIT = 1380
+ER_NO_BINARY_LOGGING = 1381
+ER_RESERVED_SYNTAX = 1382
+OBSOLETE_ER_WSAS_FAILED = 1383
+OBSOLETE_ER_DIFF_GROUPS_PROC = 1384
+OBSOLETE_ER_NO_GROUP_FOR_PROC = 1385
+OBSOLETE_ER_ORDER_WITH_PROC = 1386
+OBSOLETE_ER_LOGGING_PROHIBIT_CHANGING_OF = 1387
+OBSOLETE_ER_NO_FILE_MAPPING = 1388
+OBSOLETE_ER_WRONG_MAGIC = 1389
+ER_PS_MANY_PARAM = 1390
+ER_KEY_PART_0 = 1391
+ER_VIEW_CHECKSUM = 1392
+ER_VIEW_MULTIUPDATE = 1393
+ER_VIEW_NO_INSERT_FIELD_LIST = 1394
+ER_VIEW_DELETE_MERGE_VIEW = 1395
+ER_CANNOT_USER = 1396
+ER_XAER_NOTA = 1397
+ER_XAER_INVAL = 1398
+ER_XAER_RMFAIL = 1399
+ER_XAER_OUTSIDE = 1400
+ER_XAER_RMERR = 1401
+ER_XA_RBROLLBACK = 1402
+ER_NONEXISTING_PROC_GRANT = 1403
+ER_PROC_AUTO_GRANT_FAIL = 1404
+ER_PROC_AUTO_REVOKE_FAIL = 1405
+ER_DATA_TOO_LONG = 1406
+ER_SP_BAD_SQLSTATE = 1407
+ER_STARTUP = 1408
+ER_LOAD_FROM_FIXED_SIZE_ROWS_TO_VAR = 1409
+ER_CANT_CREATE_USER_WITH_GRANT = 1410
+ER_WRONG_VALUE_FOR_TYPE = 1411
+ER_TABLE_DEF_CHANGED = 1412
+ER_SP_DUP_HANDLER = 1413
+ER_SP_NOT_VAR_ARG = 1414
+ER_SP_NO_RETSET = 1415
+ER_CANT_CREATE_GEOMETRY_OBJECT = 1416
+OBSOLETE_ER_FAILED_ROUTINE_BREAK_BINLOG = 1417
+ER_BINLOG_UNSAFE_ROUTINE = 1418
+ER_BINLOG_CREATE_ROUTINE_NEED_SUPER = 1419
+OBSOLETE_ER_EXEC_STMT_WITH_OPEN_CURSOR = 1420
+ER_STMT_HAS_NO_OPEN_CURSOR = 1421
+ER_COMMIT_NOT_ALLOWED_IN_SF_OR_TRG = 1422
+ER_NO_DEFAULT_FOR_VIEW_FIELD = 1423
+ER_SP_NO_RECURSION = 1424
+ER_TOO_BIG_SCALE = 1425
+ER_TOO_BIG_PRECISION = 1426
+ER_M_BIGGER_THAN_D = 1427
+ER_WRONG_LOCK_OF_SYSTEM_TABLE = 1428
+ER_CONNECT_TO_FOREIGN_DATA_SOURCE = 1429
+ER_QUERY_ON_FOREIGN_DATA_SOURCE = 1430
+ER_FOREIGN_DATA_SOURCE_DOESNT_EXIST = 1431
+ER_FOREIGN_DATA_STRING_INVALID_CANT_CREATE = 1432
+ER_FOREIGN_DATA_STRING_INVALID = 1433
+OBSOLETE_ER_CANT_CREATE_FEDERATED_TABLE = 1434
+ER_TRG_IN_WRONG_SCHEMA = 1435
+ER_STACK_OVERRUN_NEED_MORE = 1436
+ER_TOO_LONG_BODY = 1437
+ER_WARN_CANT_DROP_DEFAULT_KEYCACHE = 1438
+ER_TOO_BIG_DISPLAYWIDTH = 1439
+ER_XAER_DUPID = 1440
+ER_DATETIME_FUNCTION_OVERFLOW = 1441
+ER_CANT_UPDATE_USED_TABLE_IN_SF_OR_TRG = 1442
+ER_VIEW_PREVENT_UPDATE = 1443
+ER_PS_NO_RECURSION = 1444
+ER_SP_CANT_SET_AUTOCOMMIT = 1445
+OBSOLETE_ER_MALFORMED_DEFINER = 1446
+ER_VIEW_FRM_NO_USER = 1447
+ER_VIEW_OTHER_USER = 1448
+ER_NO_SUCH_USER = 1449
+ER_FORBID_SCHEMA_CHANGE = 1450
+ER_ROW_IS_REFERENCED_2 = 1451
+ER_NO_REFERENCED_ROW_2 = 1452
+ER_SP_BAD_VAR_SHADOW = 1453
+ER_TRG_NO_DEFINER = 1454
+ER_OLD_FILE_FORMAT = 1455
+ER_SP_RECURSION_LIMIT = 1456
+OBSOLETE_ER_SP_PROC_TABLE_CORRUPT = 1457
+ER_SP_WRONG_NAME = 1458
+ER_TABLE_NEEDS_UPGRADE = 1459
+ER_SP_NO_AGGREGATE = 1460
+ER_MAX_PREPARED_STMT_COUNT_REACHED = 1461
+ER_VIEW_RECURSIVE = 1462
+ER_NON_GROUPING_FIELD_USED = 1463
+ER_TABLE_CANT_HANDLE_SPKEYS = 1464
+ER_NO_TRIGGERS_ON_SYSTEM_SCHEMA = 1465
+ER_REMOVED_SPACES = 1466
+ER_AUTOINC_READ_FAILED = 1467
+ER_USERNAME = 1468
+ER_HOSTNAME = 1469
+ER_WRONG_STRING_LENGTH = 1470
+ER_NON_INSERTABLE_TABLE = 1471
+ER_ADMIN_WRONG_MRG_TABLE = 1472
+ER_TOO_HIGH_LEVEL_OF_NESTING_FOR_SELECT = 1473
+ER_NAME_BECOMES_EMPTY = 1474
+ER_AMBIGUOUS_FIELD_TERM = 1475
+ER_FOREIGN_SERVER_EXISTS = 1476
+ER_FOREIGN_SERVER_DOESNT_EXIST = 1477
+ER_ILLEGAL_HA_CREATE_OPTION = 1478
+ER_PARTITION_REQUIRES_VALUES_ERROR = 1479
+ER_PARTITION_WRONG_VALUES_ERROR = 1480
+ER_PARTITION_MAXVALUE_ERROR = 1481
+OBSOLETE_ER_PARTITION_SUBPARTITION_ERROR = 1482
+OBSOLETE_ER_PARTITION_SUBPART_MIX_ERROR = 1483
+ER_PARTITION_WRONG_NO_PART_ERROR = 1484
+ER_PARTITION_WRONG_NO_SUBPART_ERROR = 1485
+ER_WRONG_EXPR_IN_PARTITION_FUNC_ERROR = 1486
+OBSOLETE_ER_NO_CONST_EXPR_IN_RANGE_OR_LIST_ERROR = 1487
+ER_FIELD_NOT_FOUND_PART_ERROR = 1488
+OBSOLETE_ER_LIST_OF_FIELDS_ONLY_IN_HASH_ERROR = 1489
+ER_INCONSISTENT_PARTITION_INFO_ERROR = 1490
+ER_PARTITION_FUNC_NOT_ALLOWED_ERROR = 1491
+ER_PARTITIONS_MUST_BE_DEFINED_ERROR = 1492
+ER_RANGE_NOT_INCREASING_ERROR = 1493
+ER_INCONSISTENT_TYPE_OF_FUNCTIONS_ERROR = 1494
+ER_MULTIPLE_DEF_CONST_IN_LIST_PART_ERROR = 1495
+ER_PARTITION_ENTRY_ERROR = 1496
+ER_MIX_HANDLER_ERROR = 1497
+ER_PARTITION_NOT_DEFINED_ERROR = 1498
+ER_TOO_MANY_PARTITIONS_ERROR = 1499
+ER_SUBPARTITION_ERROR = 1500
+ER_CANT_CREATE_HANDLER_FILE = 1501
+ER_BLOB_FIELD_IN_PART_FUNC_ERROR = 1502
+ER_UNIQUE_KEY_NEED_ALL_FIELDS_IN_PF = 1503
+ER_NO_PARTS_ERROR = 1504
+ER_PARTITION_MGMT_ON_NONPARTITIONED = 1505
+ER_FOREIGN_KEY_ON_PARTITIONED = 1506
+ER_DROP_PARTITION_NON_EXISTENT = 1507
+ER_DROP_LAST_PARTITION = 1508
+ER_COALESCE_ONLY_ON_HASH_PARTITION = 1509
+ER_REORG_HASH_ONLY_ON_SAME_NO = 1510
+ER_REORG_NO_PARAM_ERROR = 1511
+ER_ONLY_ON_RANGE_LIST_PARTITION = 1512
+ER_ADD_PARTITION_SUBPART_ERROR = 1513
+ER_ADD_PARTITION_NO_NEW_PARTITION = 1514
+ER_COALESCE_PARTITION_NO_PARTITION = 1515
+ER_REORG_PARTITION_NOT_EXIST = 1516
+ER_SAME_NAME_PARTITION = 1517
+ER_NO_BINLOG_ERROR = 1518
+ER_CONSECUTIVE_REORG_PARTITIONS = 1519
+ER_REORG_OUTSIDE_RANGE = 1520
+ER_PARTITION_FUNCTION_FAILURE = 1521
+OBSOLETE_ER_PART_STATE_ERROR = 1522
+ER_LIMITED_PART_RANGE = 1523
+ER_PLUGIN_IS_NOT_LOADED = 1524
+ER_WRONG_VALUE = 1525
+ER_NO_PARTITION_FOR_GIVEN_VALUE = 1526
+ER_FILEGROUP_OPTION_ONLY_ONCE = 1527
+ER_CREATE_FILEGROUP_FAILED = 1528
+ER_DROP_FILEGROUP_FAILED = 1529
+ER_TABLESPACE_AUTO_EXTEND_ERROR = 1530
+ER_WRONG_SIZE_NUMBER = 1531
+ER_SIZE_OVERFLOW_ERROR = 1532
+ER_ALTER_FILEGROUP_FAILED = 1533
+ER_BINLOG_ROW_LOGGING_FAILED = 1534
+OBSOLETE_ER_BINLOG_ROW_WRONG_TABLE_DEF = 1535
+OBSOLETE_ER_BINLOG_ROW_RBR_TO_SBR = 1536
+ER_EVENT_ALREADY_EXISTS = 1537
+OBSOLETE_ER_EVENT_STORE_FAILED = 1538
+ER_EVENT_DOES_NOT_EXIST = 1539
+OBSOLETE_ER_EVENT_CANT_ALTER = 1540
+OBSOLETE_ER_EVENT_DROP_FAILED = 1541
+ER_EVENT_INTERVAL_NOT_POSITIVE_OR_TOO_BIG = 1542
+ER_EVENT_ENDS_BEFORE_STARTS = 1543
+ER_EVENT_EXEC_TIME_IN_THE_PAST = 1544
+OBSOLETE_ER_EVENT_OPEN_TABLE_FAILED = 1545
+OBSOLETE_ER_EVENT_NEITHER_M_EXPR_NOR_M_AT = 1546
+OBSOLETE_ER_COL_COUNT_DOESNT_MATCH_CORRUPTED = 1547
+OBSOLETE_ER_CANNOT_LOAD_FROM_TABLE = 1548
+OBSOLETE_ER_EVENT_CANNOT_DELETE = 1549
+OBSOLETE_ER_EVENT_COMPILE_ERROR = 1550
+ER_EVENT_SAME_NAME = 1551
+OBSOLETE_ER_EVENT_DATA_TOO_LONG = 1552
+ER_DROP_INDEX_FK = 1553
+ER_WARN_DEPRECATED_SYNTAX_WITH_VER = 1554
+OBSOLETE_ER_CANT_WRITE_LOCK_LOG_TABLE = 1555
+ER_CANT_LOCK_LOG_TABLE = 1556
+ER_FOREIGN_DUPLICATE_KEY_OLD_UNUSED = 1557
+ER_COL_COUNT_DOESNT_MATCH_PLEASE_UPDATE = 1558
+ER_TEMP_TABLE_PREVENTS_SWITCH_OUT_OF_RBR = 1559
+ER_STORED_FUNCTION_PREVENTS_SWITCH_BINLOG_FORMAT = 1560
+OBSOLETE_ER_NDB_CANT_SWITCH_BINLOG_FORMAT = 1561
+ER_PARTITION_NO_TEMPORARY = 1562
+ER_PARTITION_CONST_DOMAIN_ERROR = 1563
+ER_PARTITION_FUNCTION_IS_NOT_ALLOWED = 1564
+OBSOLETE_ER_DDL_LOG_ERROR_UNUSED = 1565
+ER_NULL_IN_VALUES_LESS_THAN = 1566
+ER_WRONG_PARTITION_NAME = 1567
+ER_CANT_CHANGE_TX_CHARACTERISTICS = 1568
+ER_DUP_ENTRY_AUTOINCREMENT_CASE = 1569
+OBSOLETE_ER_EVENT_MODIFY_QUEUE_ERROR = 1570
+ER_EVENT_SET_VAR_ERROR = 1571
+ER_PARTITION_MERGE_ERROR = 1572
+OBSOLETE_ER_CANT_ACTIVATE_LOG = 1573
+OBSOLETE_ER_RBR_NOT_AVAILABLE = 1574
+ER_BASE64_DECODE_ERROR = 1575
+ER_EVENT_RECURSION_FORBIDDEN = 1576
+OBSOLETE_ER_EVENTS_DB_ERROR = 1577
+ER_ONLY_INTEGERS_ALLOWED = 1578
+ER_UNSUPORTED_LOG_ENGINE = 1579
+ER_BAD_LOG_STATEMENT = 1580
+ER_CANT_RENAME_LOG_TABLE = 1581
+ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT = 1582
+ER_WRONG_PARAMETERS_TO_NATIVE_FCT = 1583
+ER_WRONG_PARAMETERS_TO_STORED_FCT = 1584
+ER_NATIVE_FCT_NAME_COLLISION = 1585
+ER_DUP_ENTRY_WITH_KEY_NAME = 1586
+ER_BINLOG_PURGE_EMFILE = 1587
+ER_EVENT_CANNOT_CREATE_IN_THE_PAST = 1588
+ER_EVENT_CANNOT_ALTER_IN_THE_PAST = 1589
+OBSOLETE_ER_SLAVE_INCIDENT = 1590
+ER_NO_PARTITION_FOR_GIVEN_VALUE_SILENT = 1591
+ER_BINLOG_UNSAFE_STATEMENT = 1592
+ER_BINLOG_FATAL_ERROR = 1593
+OBSOLETE_ER_SLAVE_RELAY_LOG_READ_FAILURE = 1594
+OBSOLETE_ER_SLAVE_RELAY_LOG_WRITE_FAILURE = 1595
+OBSOLETE_ER_SLAVE_CREATE_EVENT_FAILURE = 1596
+OBSOLETE_ER_SLAVE_MASTER_COM_FAILURE = 1597
+ER_BINLOG_LOGGING_IMPOSSIBLE = 1598
+ER_VIEW_NO_CREATION_CTX = 1599
+ER_VIEW_INVALID_CREATION_CTX = 1600
+OBSOLETE_ER_SR_INVALID_CREATION_CTX = 1601
+ER_TRG_CORRUPTED_FILE = 1602
+ER_TRG_NO_CREATION_CTX = 1603
+ER_TRG_INVALID_CREATION_CTX = 1604
+ER_EVENT_INVALID_CREATION_CTX = 1605
+ER_TRG_CANT_OPEN_TABLE = 1606
+OBSOLETE_ER_CANT_CREATE_SROUTINE = 1607
+OBSOLETE_ER_NEVER_USED = 1608
+ER_NO_FORMAT_DESCRIPTION_EVENT_BEFORE_BINLOG_STATEMENT = 1609
+ER_SLAVE_CORRUPT_EVENT = 1610
+OBSOLETE_ER_LOAD_DATA_INVALID_COLUMN_UNUSED = 1611
+ER_LOG_PURGE_NO_FILE = 1612
+ER_XA_RBTIMEOUT = 1613
+ER_XA_RBDEADLOCK = 1614
+ER_NEED_REPREPARE = 1615
+OBSOLETE_ER_DELAYED_NOT_SUPPORTED = 1616
+WARN_NO_MASTER_INFO = 1617
+WARN_OPTION_IGNORED = 1618
+ER_PLUGIN_DELETE_BUILTIN = 1619
+WARN_PLUGIN_BUSY = 1620
+ER_VARIABLE_IS_READONLY = 1621
+ER_WARN_ENGINE_TRANSACTION_ROLLBACK = 1622
+OBSOLETE_ER_SLAVE_HEARTBEAT_FAILURE = 1623
+ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE = 1624
+ER_NDB_REPLICATION_SCHEMA_ERROR = 1625
+ER_CONFLICT_FN_PARSE_ERROR = 1626
+ER_EXCEPTIONS_WRITE_ERROR = 1627
+ER_TOO_LONG_TABLE_COMMENT = 1628
+ER_TOO_LONG_FIELD_COMMENT = 1629
+ER_FUNC_INEXISTENT_NAME_COLLISION = 1630
+ER_DATABASE_NAME = 1631
+ER_TABLE_NAME = 1632
+ER_PARTITION_NAME = 1633
+ER_SUBPARTITION_NAME = 1634
+ER_TEMPORARY_NAME = 1635
+ER_RENAMED_NAME = 1636
+ER_TOO_MANY_CONCURRENT_TRXS = 1637
+WARN_NON_ASCII_SEPARATOR_NOT_IMPLEMENTED = 1638
+ER_DEBUG_SYNC_TIMEOUT = 1639
+ER_DEBUG_SYNC_HIT_LIMIT = 1640
+ER_DUP_SIGNAL_SET = 1641
+ER_SIGNAL_WARN = 1642
+ER_SIGNAL_NOT_FOUND = 1643
+ER_SIGNAL_EXCEPTION = 1644
+ER_RESIGNAL_WITHOUT_ACTIVE_HANDLER = 1645
+ER_SIGNAL_BAD_CONDITION_TYPE = 1646
+WARN_COND_ITEM_TRUNCATED = 1647
+ER_COND_ITEM_TOO_LONG = 1648
+ER_UNKNOWN_LOCALE = 1649
+ER_SLAVE_IGNORE_SERVER_IDS = 1650
+OBSOLETE_ER_QUERY_CACHE_DISABLED = 1651
+ER_SAME_NAME_PARTITION_FIELD = 1652
+ER_PARTITION_COLUMN_LIST_ERROR = 1653
+ER_WRONG_TYPE_COLUMN_VALUE_ERROR = 1654
+ER_TOO_MANY_PARTITION_FUNC_FIELDS_ERROR = 1655
+ER_MAXVALUE_IN_VALUES_IN = 1656
+ER_TOO_MANY_VALUES_ERROR = 1657
+ER_ROW_SINGLE_PARTITION_FIELD_ERROR = 1658
+ER_FIELD_TYPE_NOT_ALLOWED_AS_PARTITION_FIELD = 1659
+ER_PARTITION_FIELDS_TOO_LONG = 1660
+ER_BINLOG_ROW_ENGINE_AND_STMT_ENGINE = 1661
+ER_BINLOG_ROW_MODE_AND_STMT_ENGINE = 1662
+ER_BINLOG_UNSAFE_AND_STMT_ENGINE = 1663
+ER_BINLOG_ROW_INJECTION_AND_STMT_ENGINE = 1664
+ER_BINLOG_STMT_MODE_AND_ROW_ENGINE = 1665
+ER_BINLOG_ROW_INJECTION_AND_STMT_MODE = 1666
+ER_BINLOG_MULTIPLE_ENGINES_AND_SELF_LOGGING_ENGINE = 1667
+ER_BINLOG_UNSAFE_LIMIT = 1668
+OBSOLETE_ER_UNUSED4 = 1669
+ER_BINLOG_UNSAFE_SYSTEM_TABLE = 1670
+ER_BINLOG_UNSAFE_AUTOINC_COLUMNS = 1671
+ER_BINLOG_UNSAFE_UDF = 1672
+ER_BINLOG_UNSAFE_SYSTEM_VARIABLE = 1673
+ER_BINLOG_UNSAFE_SYSTEM_FUNCTION = 1674
+ER_BINLOG_UNSAFE_NONTRANS_AFTER_TRANS = 1675
+ER_MESSAGE_AND_STATEMENT = 1676
+OBSOLETE_ER_SLAVE_CONVERSION_FAILED = 1677
+ER_SLAVE_CANT_CREATE_CONVERSION = 1678
+ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_BINLOG_FORMAT = 1679
+ER_PATH_LENGTH = 1680
+ER_WARN_DEPRECATED_SYNTAX_NO_REPLACEMENT = 1681
+ER_WRONG_NATIVE_TABLE_STRUCTURE = 1682
+ER_WRONG_PERFSCHEMA_USAGE = 1683
+ER_WARN_I_S_SKIPPED_TABLE = 1684
+ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_BINLOG_DIRECT = 1685
+ER_STORED_FUNCTION_PREVENTS_SWITCH_BINLOG_DIRECT = 1686
+ER_SPATIAL_MUST_HAVE_GEOM_COL = 1687
+ER_TOO_LONG_INDEX_COMMENT = 1688
+ER_LOCK_ABORTED = 1689
+ER_DATA_OUT_OF_RANGE = 1690
+ER_WRONG_SPVAR_TYPE_IN_LIMIT = 1691
+ER_BINLOG_UNSAFE_MULTIPLE_ENGINES_AND_SELF_LOGGING_ENGINE = 1692
+ER_BINLOG_UNSAFE_MIXED_STATEMENT = 1693
+ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_SQL_LOG_BIN = 1694
+ER_STORED_FUNCTION_PREVENTS_SWITCH_SQL_LOG_BIN = 1695
+ER_FAILED_READ_FROM_PAR_FILE = 1696
+ER_VALUES_IS_NOT_INT_TYPE_ERROR = 1697
+ER_ACCESS_DENIED_NO_PASSWORD_ERROR = 1698
+ER_SET_PASSWORD_AUTH_PLUGIN = 1699
+OBSOLETE_ER_GRANT_PLUGIN_USER_EXISTS = 1700
+ER_TRUNCATE_ILLEGAL_FK = 1701
+ER_PLUGIN_IS_PERMANENT = 1702
+ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE_MIN = 1703
+ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE_MAX = 1704
+ER_STMT_CACHE_FULL = 1705
+ER_MULTI_UPDATE_KEY_CONFLICT = 1706
+ER_TABLE_NEEDS_REBUILD = 1707
+WARN_OPTION_BELOW_LIMIT = 1708
+ER_INDEX_COLUMN_TOO_LONG = 1709
+ER_ERROR_IN_TRIGGER_BODY = 1710
+ER_ERROR_IN_UNKNOWN_TRIGGER_BODY = 1711
+ER_INDEX_CORRUPT = 1712
+ER_UNDO_RECORD_TOO_BIG = 1713
+ER_BINLOG_UNSAFE_INSERT_IGNORE_SELECT = 1714
+ER_BINLOG_UNSAFE_INSERT_SELECT_UPDATE = 1715
+ER_BINLOG_UNSAFE_REPLACE_SELECT = 1716
+ER_BINLOG_UNSAFE_CREATE_IGNORE_SELECT = 1717
+ER_BINLOG_UNSAFE_CREATE_REPLACE_SELECT = 1718
+ER_BINLOG_UNSAFE_UPDATE_IGNORE = 1719
+ER_PLUGIN_NO_UNINSTALL = 1720
+ER_PLUGIN_NO_INSTALL = 1721
+ER_BINLOG_UNSAFE_WRITE_AUTOINC_SELECT = 1722
+ER_BINLOG_UNSAFE_CREATE_SELECT_AUTOINC = 1723
+ER_BINLOG_UNSAFE_INSERT_TWO_KEYS = 1724
+ER_TABLE_IN_FK_CHECK = 1725
+ER_UNSUPPORTED_ENGINE = 1726
+ER_BINLOG_UNSAFE_AUTOINC_NOT_FIRST = 1727
+ER_CANNOT_LOAD_FROM_TABLE_V2 = 1728
+ER_MASTER_DELAY_VALUE_OUT_OF_RANGE = 1729
+ER_ONLY_FD_AND_RBR_EVENTS_ALLOWED_IN_BINLOG_STATEMENT = 1730
+ER_PARTITION_EXCHANGE_DIFFERENT_OPTION = 1731
+ER_PARTITION_EXCHANGE_PART_TABLE = 1732
+ER_PARTITION_EXCHANGE_TEMP_TABLE = 1733
+ER_PARTITION_INSTEAD_OF_SUBPARTITION = 1734
+ER_UNKNOWN_PARTITION = 1735
+ER_TABLES_DIFFERENT_METADATA = 1736
+ER_ROW_DOES_NOT_MATCH_PARTITION = 1737
+ER_BINLOG_CACHE_SIZE_GREATER_THAN_MAX = 1738
+ER_WARN_INDEX_NOT_APPLICABLE = 1739
+ER_PARTITION_EXCHANGE_FOREIGN_KEY = 1740
+OBSOLETE_ER_NO_SUCH_KEY_VALUE = 1741
+ER_RPL_INFO_DATA_TOO_LONG = 1742
+OBSOLETE_ER_NETWORK_READ_EVENT_CHECKSUM_FAILURE = 1743
+OBSOLETE_ER_BINLOG_READ_EVENT_CHECKSUM_FAILURE = 1744
+ER_BINLOG_STMT_CACHE_SIZE_GREATER_THAN_MAX = 1745
+ER_CANT_UPDATE_TABLE_IN_CREATE_TABLE_SELECT = 1746
+ER_PARTITION_CLAUSE_ON_NONPARTITIONED = 1747
+ER_ROW_DOES_NOT_MATCH_GIVEN_PARTITION_SET = 1748
+OBSOLETE_ER_NO_SUCH_PARTITION__UNUSED = 1749
+ER_CHANGE_RPL_INFO_REPOSITORY_FAILURE = 1750
+ER_WARNING_NOT_COMPLETE_ROLLBACK_WITH_CREATED_TEMP_TABLE = 1751
+ER_WARNING_NOT_COMPLETE_ROLLBACK_WITH_DROPPED_TEMP_TABLE = 1752
+ER_MTS_FEATURE_IS_NOT_SUPPORTED = 1753
+ER_MTS_UPDATED_DBS_GREATER_MAX = 1754
+ER_MTS_CANT_PARALLEL = 1755
+ER_MTS_INCONSISTENT_DATA = 1756
+ER_FULLTEXT_NOT_SUPPORTED_WITH_PARTITIONING = 1757
+ER_DA_INVALID_CONDITION_NUMBER = 1758
+ER_INSECURE_PLAIN_TEXT = 1759
+ER_INSECURE_CHANGE_MASTER = 1760
+ER_FOREIGN_DUPLICATE_KEY_WITH_CHILD_INFO = 1761
+ER_FOREIGN_DUPLICATE_KEY_WITHOUT_CHILD_INFO = 1762
+ER_SQLTHREAD_WITH_SECURE_SLAVE = 1763
+ER_TABLE_HAS_NO_FT = 1764
+ER_VARIABLE_NOT_SETTABLE_IN_SF_OR_TRIGGER = 1765
+ER_VARIABLE_NOT_SETTABLE_IN_TRANSACTION = 1766
+OBSOLETE_ER_GTID_NEXT_IS_NOT_IN_GTID_NEXT_LIST = 1767
+OBSOLETE_ER_CANT_CHANGE_GTID_NEXT_IN_TRANSACTION = 1768
+ER_SET_STATEMENT_CANNOT_INVOKE_FUNCTION = 1769
+ER_GTID_NEXT_CANT_BE_AUTOMATIC_IF_GTID_NEXT_LIST_IS_NON_NULL = 1770
+OBSOLETE_ER_SKIPPING_LOGGED_TRANSACTION = 1771
+ER_MALFORMED_GTID_SET_SPECIFICATION = 1772
+ER_MALFORMED_GTID_SET_ENCODING = 1773
+ER_MALFORMED_GTID_SPECIFICATION = 1774
+ER_GNO_EXHAUSTED = 1775
+ER_BAD_SLAVE_AUTO_POSITION = 1776
+ER_AUTO_POSITION_REQUIRES_GTID_MODE_NOT_OFF = 1777
+ER_CANT_DO_IMPLICIT_COMMIT_IN_TRX_WHEN_GTID_NEXT_IS_SET = 1778
+ER_GTID_MODE_ON_REQUIRES_ENFORCE_GTID_CONSISTENCY_ON = 1779
+OBSOLETE_ER_GTID_MODE_REQUIRES_BINLOG = 1780
+ER_CANT_SET_GTID_NEXT_TO_GTID_WHEN_GTID_MODE_IS_OFF = 1781
+ER_CANT_SET_GTID_NEXT_TO_ANONYMOUS_WHEN_GTID_MODE_IS_ON = 1782
+ER_CANT_SET_GTID_NEXT_LIST_TO_NON_NULL_WHEN_GTID_MODE_IS_OFF = 1783
+OBSOLETE_ER_FOUND_GTID_EVENT_WHEN_GTID_MODE_IS_OFF__UNUSED = 1784
+ER_GTID_UNSAFE_NON_TRANSACTIONAL_TABLE = 1785
+ER_GTID_UNSAFE_CREATE_SELECT = 1786
+ER_GTID_UNSAFE_CREATE_DROP_TEMPORARY_TABLE_IN_TRANSACTION = 1787
+ER_GTID_MODE_CAN_ONLY_CHANGE_ONE_STEP_AT_A_TIME = 1788
+ER_MASTER_HAS_PURGED_REQUIRED_GTIDS = 1789
+ER_CANT_SET_GTID_NEXT_WHEN_OWNING_GTID = 1790
+ER_UNKNOWN_EXPLAIN_FORMAT = 1791
+ER_CANT_EXECUTE_IN_READ_ONLY_TRANSACTION = 1792
+ER_TOO_LONG_TABLE_PARTITION_COMMENT = 1793
+ER_SLAVE_CONFIGURATION = 1794
+ER_INNODB_FT_LIMIT = 1795
+ER_INNODB_NO_FT_TEMP_TABLE = 1796
+ER_INNODB_FT_WRONG_DOCID_COLUMN = 1797
+ER_INNODB_FT_WRONG_DOCID_INDEX = 1798
+ER_INNODB_ONLINE_LOG_TOO_BIG = 1799
+ER_UNKNOWN_ALTER_ALGORITHM = 1800
+ER_UNKNOWN_ALTER_LOCK = 1801
+ER_MTS_CHANGE_MASTER_CANT_RUN_WITH_GAPS = 1802
+ER_MTS_RECOVERY_FAILURE = 1803
+ER_MTS_RESET_WORKERS = 1804
+ER_COL_COUNT_DOESNT_MATCH_CORRUPTED_V2 = 1805
+ER_SLAVE_SILENT_RETRY_TRANSACTION = 1806
+ER_DISCARD_FK_CHECKS_RUNNING = 1807
+ER_TABLE_SCHEMA_MISMATCH = 1808
+ER_TABLE_IN_SYSTEM_TABLESPACE = 1809
+ER_IO_READ_ERROR = 1810
+ER_IO_WRITE_ERROR = 1811
+ER_TABLESPACE_MISSING = 1812
+ER_TABLESPACE_EXISTS = 1813
+ER_TABLESPACE_DISCARDED = 1814
+ER_INTERNAL_ERROR = 1815
+ER_INNODB_IMPORT_ERROR = 1816
+ER_INNODB_INDEX_CORRUPT = 1817
+ER_INVALID_YEAR_COLUMN_LENGTH = 1818
+ER_NOT_VALID_PASSWORD = 1819
+ER_MUST_CHANGE_PASSWORD = 1820
+ER_FK_NO_INDEX_CHILD = 1821
+ER_FK_NO_INDEX_PARENT = 1822
+ER_FK_FAIL_ADD_SYSTEM = 1823
+ER_FK_CANNOT_OPEN_PARENT = 1824
+ER_FK_INCORRECT_OPTION = 1825
+ER_FK_DUP_NAME = 1826
+ER_PASSWORD_FORMAT = 1827
+ER_FK_COLUMN_CANNOT_DROP = 1828
+ER_FK_COLUMN_CANNOT_DROP_CHILD = 1829
+ER_FK_COLUMN_NOT_NULL = 1830
+ER_DUP_INDEX = 1831
+ER_FK_COLUMN_CANNOT_CHANGE = 1832
+ER_FK_COLUMN_CANNOT_CHANGE_CHILD = 1833
+OBSOLETE_ER_UNUSED5 = 1834
+ER_MALFORMED_PACKET = 1835
+ER_READ_ONLY_MODE = 1836
+ER_GTID_NEXT_TYPE_UNDEFINED_GTID = 1837
+ER_VARIABLE_NOT_SETTABLE_IN_SP = 1838
+OBSOLETE_ER_CANT_SET_GTID_PURGED_WHEN_GTID_MODE_IS_OFF = 1839
+ER_CANT_SET_GTID_PURGED_WHEN_GTID_EXECUTED_IS_NOT_EMPTY = 1840
+ER_CANT_SET_GTID_PURGED_WHEN_OWNED_GTIDS_IS_NOT_EMPTY = 1841
+ER_GTID_PURGED_WAS_CHANGED = 1842
+ER_GTID_EXECUTED_WAS_CHANGED = 1843
+ER_BINLOG_STMT_MODE_AND_NO_REPL_TABLES = 1844
+ER_ALTER_OPERATION_NOT_SUPPORTED = 1845
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON = 1846
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_COPY = 1847
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_PARTITION = 1848
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_FK_RENAME = 1849
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_COLUMN_TYPE = 1850
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_FK_CHECK = 1851
+OBSOLETE_ER_UNUSED6 = 1852
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_NOPK = 1853
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_AUTOINC = 1854
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_HIDDEN_FTS = 1855
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_CHANGE_FTS = 1856
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_FTS = 1857
+ER_SQL_SLAVE_SKIP_COUNTER_NOT_SETTABLE_IN_GTID_MODE = 1858
+ER_DUP_UNKNOWN_IN_INDEX = 1859
+ER_IDENT_CAUSES_TOO_LONG_PATH = 1860
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_NOT_NULL = 1861
+ER_MUST_CHANGE_PASSWORD_LOGIN = 1862
+ER_ROW_IN_WRONG_PARTITION = 1863
+ER_MTS_EVENT_BIGGER_PENDING_JOBS_SIZE_MAX = 1864
+OBSOLETE_ER_INNODB_NO_FT_USES_PARSER = 1865
+ER_BINLOG_LOGICAL_CORRUPTION = 1866
+ER_WARN_PURGE_LOG_IN_USE = 1867
+ER_WARN_PURGE_LOG_IS_ACTIVE = 1868
+ER_AUTO_INCREMENT_CONFLICT = 1869
+WARN_ON_BLOCKHOLE_IN_RBR = 1870
+ER_SLAVE_MI_INIT_REPOSITORY = 1871
+ER_SLAVE_RLI_INIT_REPOSITORY = 1872
+ER_ACCESS_DENIED_CHANGE_USER_ERROR = 1873
+ER_INNODB_READ_ONLY = 1874
+ER_STOP_SLAVE_SQL_THREAD_TIMEOUT = 1875
+ER_STOP_SLAVE_IO_THREAD_TIMEOUT = 1876
+ER_TABLE_CORRUPT = 1877
+ER_TEMP_FILE_WRITE_FAILURE = 1878
+ER_INNODB_FT_AUX_NOT_HEX_ID = 1879
+ER_OLD_TEMPORALS_UPGRADED = 1880
+ER_INNODB_FORCED_RECOVERY = 1881
+ER_AES_INVALID_IV = 1882
+ER_PLUGIN_CANNOT_BE_UNINSTALLED = 1883
+ER_GTID_UNSAFE_BINLOG_SPLITTABLE_STATEMENT_AND_ASSIGNED_GTID = 1884
+ER_SLAVE_HAS_MORE_GTIDS_THAN_MASTER = 1885
+ER_MISSING_KEY = 1886
+ER_FILE_CORRUPT = 3000
+ER_ERROR_ON_MASTER = 3001
+OBSOLETE_ER_INCONSISTENT_ERROR = 3002
+ER_STORAGE_ENGINE_NOT_LOADED = 3003
+ER_GET_STACKED_DA_WITHOUT_ACTIVE_HANDLER = 3004
+ER_WARN_LEGACY_SYNTAX_CONVERTED = 3005
+ER_BINLOG_UNSAFE_FULLTEXT_PLUGIN = 3006
+ER_CANNOT_DISCARD_TEMPORARY_TABLE = 3007
+ER_FK_DEPTH_EXCEEDED = 3008
+ER_COL_COUNT_DOESNT_MATCH_PLEASE_UPDATE_V2 = 3009
+ER_WARN_TRIGGER_DOESNT_HAVE_CREATED = 3010
+ER_REFERENCED_TRG_DOES_NOT_EXIST = 3011
+ER_EXPLAIN_NOT_SUPPORTED = 3012
+ER_INVALID_FIELD_SIZE = 3013
+ER_MISSING_HA_CREATE_OPTION = 3014
+ER_ENGINE_OUT_OF_MEMORY = 3015
+ER_PASSWORD_EXPIRE_ANONYMOUS_USER = 3016
+ER_SLAVE_SQL_THREAD_MUST_STOP = 3017
+ER_NO_FT_MATERIALIZED_SUBQUERY = 3018
+ER_INNODB_UNDO_LOG_FULL = 3019
+ER_INVALID_ARGUMENT_FOR_LOGARITHM = 3020
+ER_SLAVE_CHANNEL_IO_THREAD_MUST_STOP = 3021
+ER_WARN_OPEN_TEMP_TABLES_MUST_BE_ZERO = 3022
+ER_WARN_ONLY_MASTER_LOG_FILE_NO_POS = 3023
+ER_QUERY_TIMEOUT = 3024
+ER_NON_RO_SELECT_DISABLE_TIMER = 3025
+ER_DUP_LIST_ENTRY = 3026
+OBSOLETE_ER_SQL_MODE_NO_EFFECT = 3027
+ER_AGGREGATE_ORDER_FOR_UNION = 3028
+ER_AGGREGATE_ORDER_NON_AGG_QUERY = 3029
+ER_SLAVE_WORKER_STOPPED_PREVIOUS_THD_ERROR = 3030
+ER_DONT_SUPPORT_SLAVE_PRESERVE_COMMIT_ORDER = 3031
+ER_SERVER_OFFLINE_MODE = 3032
+ER_GIS_DIFFERENT_SRIDS = 3033
+ER_GIS_UNSUPPORTED_ARGUMENT = 3034
+ER_GIS_UNKNOWN_ERROR = 3035
+ER_GIS_UNKNOWN_EXCEPTION = 3036
+ER_GIS_INVALID_DATA = 3037
+ER_BOOST_GEOMETRY_EMPTY_INPUT_EXCEPTION = 3038
+ER_BOOST_GEOMETRY_CENTROID_EXCEPTION = 3039
+ER_BOOST_GEOMETRY_OVERLAY_INVALID_INPUT_EXCEPTION = 3040
+ER_BOOST_GEOMETRY_TURN_INFO_EXCEPTION = 3041
+ER_BOOST_GEOMETRY_SELF_INTERSECTION_POINT_EXCEPTION = 3042
+ER_BOOST_GEOMETRY_UNKNOWN_EXCEPTION = 3043
+ER_STD_BAD_ALLOC_ERROR = 3044
+ER_STD_DOMAIN_ERROR = 3045
+ER_STD_LENGTH_ERROR = 3046
+ER_STD_INVALID_ARGUMENT = 3047
+ER_STD_OUT_OF_RANGE_ERROR = 3048
+ER_STD_OVERFLOW_ERROR = 3049
+ER_STD_RANGE_ERROR = 3050
+ER_STD_UNDERFLOW_ERROR = 3051
+ER_STD_LOGIC_ERROR = 3052
+ER_STD_RUNTIME_ERROR = 3053
+ER_STD_UNKNOWN_EXCEPTION = 3054
+ER_GIS_DATA_WRONG_ENDIANESS = 3055
+ER_CHANGE_MASTER_PASSWORD_LENGTH = 3056
+ER_USER_LOCK_WRONG_NAME = 3057
+ER_USER_LOCK_DEADLOCK = 3058
+ER_REPLACE_INACCESSIBLE_ROWS = 3059
+ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_GIS = 3060
+ER_ILLEGAL_USER_VAR = 3061
+ER_GTID_MODE_OFF = 3062
+OBSOLETE_ER_UNSUPPORTED_BY_REPLICATION_THREAD = 3063
+ER_INCORRECT_TYPE = 3064
+ER_FIELD_IN_ORDER_NOT_SELECT = 3065
+ER_AGGREGATE_IN_ORDER_NOT_SELECT = 3066
+ER_INVALID_RPL_WILD_TABLE_FILTER_PATTERN = 3067
+ER_NET_OK_PACKET_TOO_LARGE = 3068
+ER_INVALID_JSON_DATA = 3069
+ER_INVALID_GEOJSON_MISSING_MEMBER = 3070
+ER_INVALID_GEOJSON_WRONG_TYPE = 3071
+ER_INVALID_GEOJSON_UNSPECIFIED = 3072
+ER_DIMENSION_UNSUPPORTED = 3073
+ER_SLAVE_CHANNEL_DOES_NOT_EXIST = 3074
+OBSOLETE_ER_SLAVE_MULTIPLE_CHANNELS_HOST_PORT = 3075
+ER_SLAVE_CHANNEL_NAME_INVALID_OR_TOO_LONG = 3076
+ER_SLAVE_NEW_CHANNEL_WRONG_REPOSITORY = 3077
+OBSOLETE_ER_SLAVE_CHANNEL_DELETE = 3078
+ER_SLAVE_MULTIPLE_CHANNELS_CMD = 3079
+ER_SLAVE_MAX_CHANNELS_EXCEEDED = 3080
+ER_SLAVE_CHANNEL_MUST_STOP = 3081
+ER_SLAVE_CHANNEL_NOT_RUNNING = 3082
+ER_SLAVE_CHANNEL_WAS_RUNNING = 3083
+ER_SLAVE_CHANNEL_WAS_NOT_RUNNING = 3084
+ER_SLAVE_CHANNEL_SQL_THREAD_MUST_STOP = 3085
+ER_SLAVE_CHANNEL_SQL_SKIP_COUNTER = 3086
+ER_WRONG_FIELD_WITH_GROUP_V2 = 3087
+ER_MIX_OF_GROUP_FUNC_AND_FIELDS_V2 = 3088
+ER_WARN_DEPRECATED_SYSVAR_UPDATE = 3089
+ER_WARN_DEPRECATED_SQLMODE = 3090
+ER_CANNOT_LOG_PARTIAL_DROP_DATABASE_WITH_GTID = 3091
+ER_GROUP_REPLICATION_CONFIGURATION = 3092
+ER_GROUP_REPLICATION_RUNNING = 3093
+ER_GROUP_REPLICATION_APPLIER_INIT_ERROR = 3094
+ER_GROUP_REPLICATION_STOP_APPLIER_THREAD_TIMEOUT = 3095
+ER_GROUP_REPLICATION_COMMUNICATION_LAYER_SESSION_ERROR = 3096
+ER_GROUP_REPLICATION_COMMUNICATION_LAYER_JOIN_ERROR = 3097
+ER_BEFORE_DML_VALIDATION_ERROR = 3098
+ER_PREVENTS_VARIABLE_WITHOUT_RBR = 3099
+ER_RUN_HOOK_ERROR = 3100
+ER_TRANSACTION_ROLLBACK_DURING_COMMIT = 3101
+ER_GENERATED_COLUMN_FUNCTION_IS_NOT_ALLOWED = 3102
+ER_UNSUPPORTED_ALTER_INPLACE_ON_VIRTUAL_COLUMN = 3103
+ER_WRONG_FK_OPTION_FOR_GENERATED_COLUMN = 3104
+ER_NON_DEFAULT_VALUE_FOR_GENERATED_COLUMN = 3105
+ER_UNSUPPORTED_ACTION_ON_GENERATED_COLUMN = 3106
+ER_GENERATED_COLUMN_NON_PRIOR = 3107
+ER_DEPENDENT_BY_GENERATED_COLUMN = 3108
+ER_GENERATED_COLUMN_REF_AUTO_INC = 3109
+ER_FEATURE_NOT_AVAILABLE = 3110
+ER_CANT_SET_GTID_MODE = 3111
+ER_CANT_USE_AUTO_POSITION_WITH_GTID_MODE_OFF = 3112
+OBSOLETE_ER_CANT_REPLICATE_ANONYMOUS_WITH_AUTO_POSITION = 3113
+OBSOLETE_ER_CANT_REPLICATE_ANONYMOUS_WITH_GTID_MODE_ON = 3114
+OBSOLETE_ER_CANT_REPLICATE_GTID_WITH_GTID_MODE_OFF = 3115
+ER_CANT_ENFORCE_GTID_CONSISTENCY_WITH_ONGOING_GTID_VIOLATING_TX = 3116
+ER_ENFORCE_GTID_CONSISTENCY_WARN_WITH_ONGOING_GTID_VIOLATING_TX = 3117
+ER_ACCOUNT_HAS_BEEN_LOCKED = 3118
+ER_WRONG_TABLESPACE_NAME = 3119
+ER_TABLESPACE_IS_NOT_EMPTY = 3120
+ER_WRONG_FILE_NAME = 3121
+ER_BOOST_GEOMETRY_INCONSISTENT_TURNS_EXCEPTION = 3122
+ER_WARN_OPTIMIZER_HINT_SYNTAX_ERROR = 3123
+ER_WARN_BAD_MAX_EXECUTION_TIME = 3124
+ER_WARN_UNSUPPORTED_MAX_EXECUTION_TIME = 3125
+ER_WARN_CONFLICTING_HINT = 3126
+ER_WARN_UNKNOWN_QB_NAME = 3127
+ER_UNRESOLVED_HINT_NAME = 3128
+ER_WARN_ON_MODIFYING_GTID_EXECUTED_TABLE = 3129
+ER_PLUGGABLE_PROTOCOL_COMMAND_NOT_SUPPORTED = 3130
+ER_LOCKING_SERVICE_WRONG_NAME = 3131
+ER_LOCKING_SERVICE_DEADLOCK = 3132
+ER_LOCKING_SERVICE_TIMEOUT = 3133
+ER_GIS_MAX_POINTS_IN_GEOMETRY_OVERFLOWED = 3134
+ER_SQL_MODE_MERGED = 3135
+ER_VTOKEN_PLUGIN_TOKEN_MISMATCH = 3136
+ER_VTOKEN_PLUGIN_TOKEN_NOT_FOUND = 3137
+ER_CANT_SET_VARIABLE_WHEN_OWNING_GTID = 3138
+ER_SLAVE_CHANNEL_OPERATION_NOT_ALLOWED = 3139
+ER_INVALID_JSON_TEXT = 3140
+ER_INVALID_JSON_TEXT_IN_PARAM = 3141
+ER_INVALID_JSON_BINARY_DATA = 3142
+ER_INVALID_JSON_PATH = 3143
+ER_INVALID_JSON_CHARSET = 3144
+ER_INVALID_JSON_CHARSET_IN_FUNCTION = 3145
+ER_INVALID_TYPE_FOR_JSON = 3146
+ER_INVALID_CAST_TO_JSON = 3147
+ER_INVALID_JSON_PATH_CHARSET = 3148
+ER_INVALID_JSON_PATH_WILDCARD = 3149
+ER_JSON_VALUE_TOO_BIG = 3150
+ER_JSON_KEY_TOO_BIG = 3151
+ER_JSON_USED_AS_KEY = 3152
+ER_JSON_VACUOUS_PATH = 3153
+ER_JSON_BAD_ONE_OR_ALL_ARG = 3154
+ER_NUMERIC_JSON_VALUE_OUT_OF_RANGE = 3155
+ER_INVALID_JSON_VALUE_FOR_CAST = 3156
+ER_JSON_DOCUMENT_TOO_DEEP = 3157
+ER_JSON_DOCUMENT_NULL_KEY = 3158
+ER_SECURE_TRANSPORT_REQUIRED = 3159
+ER_NO_SECURE_TRANSPORTS_CONFIGURED = 3160
+ER_DISABLED_STORAGE_ENGINE = 3161
+ER_USER_DOES_NOT_EXIST = 3162
+ER_USER_ALREADY_EXISTS = 3163
+ER_AUDIT_API_ABORT = 3164
+ER_INVALID_JSON_PATH_ARRAY_CELL = 3165
+ER_BUFPOOL_RESIZE_INPROGRESS = 3166
+ER_FEATURE_DISABLED_SEE_DOC = 3167
+ER_SERVER_ISNT_AVAILABLE = 3168
+ER_SESSION_WAS_KILLED = 3169
+ER_CAPACITY_EXCEEDED = 3170
+ER_CAPACITY_EXCEEDED_IN_RANGE_OPTIMIZER = 3171
+OBSOLETE_ER_TABLE_NEEDS_UPG_PART = 3172
+ER_CANT_WAIT_FOR_EXECUTED_GTID_SET_WHILE_OWNING_A_GTID = 3173
+ER_CANNOT_ADD_FOREIGN_BASE_COL_VIRTUAL = 3174
+ER_CANNOT_CREATE_VIRTUAL_INDEX_CONSTRAINT = 3175
+ER_ERROR_ON_MODIFYING_GTID_EXECUTED_TABLE = 3176
+ER_LOCK_REFUSED_BY_ENGINE = 3177
+ER_UNSUPPORTED_ALTER_ONLINE_ON_VIRTUAL_COLUMN = 3178
+ER_MASTER_KEY_ROTATION_NOT_SUPPORTED_BY_SE = 3179
+OBSOLETE_ER_MASTER_KEY_ROTATION_ERROR_BY_SE = 3180
+ER_MASTER_KEY_ROTATION_BINLOG_FAILED = 3181
+ER_MASTER_KEY_ROTATION_SE_UNAVAILABLE = 3182
+ER_TABLESPACE_CANNOT_ENCRYPT = 3183
+ER_INVALID_ENCRYPTION_OPTION = 3184
+ER_CANNOT_FIND_KEY_IN_KEYRING = 3185
+ER_CAPACITY_EXCEEDED_IN_PARSER = 3186
+ER_UNSUPPORTED_ALTER_ENCRYPTION_INPLACE = 3187
+ER_KEYRING_UDF_KEYRING_SERVICE_ERROR = 3188
+ER_USER_COLUMN_OLD_LENGTH = 3189
+ER_CANT_RESET_MASTER = 3190
+ER_GROUP_REPLICATION_MAX_GROUP_SIZE = 3191
+ER_CANNOT_ADD_FOREIGN_BASE_COL_STORED = 3192
+ER_TABLE_REFERENCED = 3193
+OBSOLETE_ER_PARTITION_ENGINE_DEPRECATED_FOR_TABLE = 3194
+OBSOLETE_ER_WARN_USING_GEOMFROMWKB_TO_SET_SRID_ZERO = 3195
+OBSOLETE_ER_WARN_USING_GEOMFROMWKB_TO_SET_SRID = 3196
+ER_XA_RETRY = 3197
+ER_KEYRING_AWS_UDF_AWS_KMS_ERROR = 3198
+ER_BINLOG_UNSAFE_XA = 3199
+ER_UDF_ERROR = 3200
+ER_KEYRING_MIGRATION_FAILURE = 3201
+ER_KEYRING_ACCESS_DENIED_ERROR = 3202
+ER_KEYRING_MIGRATION_STATUS = 3203
+OBSOLETE_ER_PLUGIN_FAILED_TO_OPEN_TABLES = 3204
+OBSOLETE_ER_PLUGIN_FAILED_TO_OPEN_TABLE = 3205
+OBSOLETE_ER_AUDIT_LOG_NO_KEYRING_PLUGIN_INSTALLED = 3206
+OBSOLETE_ER_AUDIT_LOG_ENCRYPTION_PASSWORD_HAS_NOT_BEEN_SET = 3207
+OBSOLETE_ER_AUDIT_LOG_COULD_NOT_CREATE_AES_KEY = 3208
+OBSOLETE_ER_AUDIT_LOG_ENCRYPTION_PASSWORD_CANNOT_BE_FETCHED = 3209
+OBSOLETE_ER_AUDIT_LOG_JSON_FILTERING_NOT_ENABLED = 3210
+OBSOLETE_ER_AUDIT_LOG_UDF_INSUFFICIENT_PRIVILEGE = 3211
+ER_AUDIT_LOG_SUPER_PRIVILEGE_REQUIRED = 3212
+OBSOLETE_ER_COULD_NOT_REINITIALIZE_AUDIT_LOG_FILTERS = 3213
+ER_AUDIT_LOG_UDF_INVALID_ARGUMENT_TYPE = 3214
+ER_AUDIT_LOG_UDF_INVALID_ARGUMENT_COUNT = 3215
+ER_AUDIT_LOG_HAS_NOT_BEEN_INSTALLED = 3216
+ER_AUDIT_LOG_UDF_READ_INVALID_MAX_ARRAY_LENGTH_ARG_TYPE = 3217
+ER_AUDIT_LOG_UDF_READ_INVALID_MAX_ARRAY_LENGTH_ARG_VALUE = 3218
+OBSOLETE_ER_AUDIT_LOG_JSON_FILTER_PARSING_ERROR = 3219
+OBSOLETE_ER_AUDIT_LOG_JSON_FILTER_NAME_CANNOT_BE_EMPTY = 3220
+OBSOLETE_ER_AUDIT_LOG_JSON_USER_NAME_CANNOT_BE_EMPTY = 3221
+OBSOLETE_ER_AUDIT_LOG_JSON_FILTER_DOES_NOT_EXISTS = 3222
+OBSOLETE_ER_AUDIT_LOG_USER_FIRST_CHARACTER_MUST_BE_ALPHANUMERIC = 3223
+OBSOLETE_ER_AUDIT_LOG_USER_NAME_INVALID_CHARACTER = 3224
+OBSOLETE_ER_AUDIT_LOG_HOST_NAME_INVALID_CHARACTER = 3225
+ER_UNSUPPORT_COMPRESSED_TEMPORARY_TABLE = 3500
+ER_ACL_OPERATION_FAILED = 3501
+ER_UNSUPPORTED_INDEX_ALGORITHM = 3502
+ER_NO_SUCH_DB = 3503
+ER_TOO_BIG_ENUM = 3504
+ER_TOO_LONG_SET_ENUM_VALUE = 3505
+ER_INVALID_DD_OBJECT = 3506
+ER_UPDATING_DD_TABLE = 3507
+ER_INVALID_DD_OBJECT_ID = 3508
+ER_INVALID_DD_OBJECT_NAME = 3509
+ER_TABLESPACE_MISSING_WITH_NAME = 3510
+ER_TOO_LONG_ROUTINE_COMMENT = 3511
+ER_SP_LOAD_FAILED = 3512
+ER_INVALID_BITWISE_OPERANDS_SIZE = 3513
+ER_INVALID_BITWISE_AGGREGATE_OPERANDS_SIZE = 3514
+ER_WARN_UNSUPPORTED_HINT = 3515
+ER_UNEXPECTED_GEOMETRY_TYPE = 3516
+ER_SRS_PARSE_ERROR = 3517
+ER_SRS_PROJ_PARAMETER_MISSING = 3518
+ER_WARN_SRS_NOT_FOUND = 3519
+ER_SRS_NOT_CARTESIAN = 3520
+ER_SRS_NOT_CARTESIAN_UNDEFINED = 3521
+ER_PK_INDEX_CANT_BE_INVISIBLE = 3522
+ER_UNKNOWN_AUTHID = 3523
+ER_FAILED_ROLE_GRANT = 3524
+ER_OPEN_ROLE_TABLES = 3525
+ER_FAILED_DEFAULT_ROLES = 3526
+ER_COMPONENTS_NO_SCHEME = 3527
+ER_COMPONENTS_NO_SCHEME_SERVICE = 3528
+ER_COMPONENTS_CANT_LOAD = 3529
+ER_ROLE_NOT_GRANTED = 3530
+ER_FAILED_REVOKE_ROLE = 3531
+ER_RENAME_ROLE = 3532
+ER_COMPONENTS_CANT_ACQUIRE_SERVICE_IMPLEMENTATION = 3533
+ER_COMPONENTS_CANT_SATISFY_DEPENDENCY = 3534
+ER_COMPONENTS_LOAD_CANT_REGISTER_SERVICE_IMPLEMENTATION = 3535
+ER_COMPONENTS_LOAD_CANT_INITIALIZE = 3536
+ER_COMPONENTS_UNLOAD_NOT_LOADED = 3537
+ER_COMPONENTS_UNLOAD_CANT_DEINITIALIZE = 3538
+ER_COMPONENTS_CANT_RELEASE_SERVICE = 3539
+ER_COMPONENTS_UNLOAD_CANT_UNREGISTER_SERVICE = 3540
+ER_COMPONENTS_CANT_UNLOAD = 3541
+ER_WARN_UNLOAD_THE_NOT_PERSISTED = 3542
+ER_COMPONENT_TABLE_INCORRECT = 3543
+ER_COMPONENT_MANIPULATE_ROW_FAILED = 3544
+ER_COMPONENTS_UNLOAD_DUPLICATE_IN_GROUP = 3545
+ER_CANT_SET_GTID_PURGED_DUE_SETS_CONSTRAINTS = 3546
+ER_CANNOT_LOCK_USER_MANAGEMENT_CACHES = 3547
+ER_SRS_NOT_FOUND = 3548
+ER_VARIABLE_NOT_PERSISTED = 3549
+ER_IS_QUERY_INVALID_CLAUSE = 3550
+ER_UNABLE_TO_STORE_STATISTICS = 3551
+ER_NO_SYSTEM_SCHEMA_ACCESS = 3552
+ER_NO_SYSTEM_TABLESPACE_ACCESS = 3553
+ER_NO_SYSTEM_TABLE_ACCESS = 3554
+ER_NO_SYSTEM_TABLE_ACCESS_FOR_DICTIONARY_TABLE = 3555
+ER_NO_SYSTEM_TABLE_ACCESS_FOR_SYSTEM_TABLE = 3556
+ER_NO_SYSTEM_TABLE_ACCESS_FOR_TABLE = 3557
+ER_INVALID_OPTION_KEY = 3558
+ER_INVALID_OPTION_VALUE = 3559
+ER_INVALID_OPTION_KEY_VALUE_PAIR = 3560
+ER_INVALID_OPTION_START_CHARACTER = 3561
+ER_INVALID_OPTION_END_CHARACTER = 3562
+ER_INVALID_OPTION_CHARACTERS = 3563
+ER_DUPLICATE_OPTION_KEY = 3564
+ER_WARN_SRS_NOT_FOUND_AXIS_ORDER = 3565
+ER_NO_ACCESS_TO_NATIVE_FCT = 3566
+ER_RESET_MASTER_TO_VALUE_OUT_OF_RANGE = 3567
+ER_UNRESOLVED_TABLE_LOCK = 3568
+ER_DUPLICATE_TABLE_LOCK = 3569
+ER_BINLOG_UNSAFE_SKIP_LOCKED = 3570
+ER_BINLOG_UNSAFE_NOWAIT = 3571
+ER_LOCK_NOWAIT = 3572
+ER_CTE_RECURSIVE_REQUIRES_UNION = 3573
+ER_CTE_RECURSIVE_REQUIRES_NONRECURSIVE_FIRST = 3574
+ER_CTE_RECURSIVE_FORBIDS_AGGREGATION = 3575
+ER_CTE_RECURSIVE_FORBIDDEN_JOIN_ORDER = 3576
+ER_CTE_RECURSIVE_REQUIRES_SINGLE_REFERENCE = 3577
+ER_SWITCH_TMP_ENGINE = 3578
+ER_WINDOW_NO_SUCH_WINDOW = 3579
+ER_WINDOW_CIRCULARITY_IN_WINDOW_GRAPH = 3580
+ER_WINDOW_NO_CHILD_PARTITIONING = 3581
+ER_WINDOW_NO_INHERIT_FRAME = 3582
+ER_WINDOW_NO_REDEFINE_ORDER_BY = 3583
+ER_WINDOW_FRAME_START_ILLEGAL = 3584
+ER_WINDOW_FRAME_END_ILLEGAL = 3585
+ER_WINDOW_FRAME_ILLEGAL = 3586
+ER_WINDOW_RANGE_FRAME_ORDER_TYPE = 3587
+ER_WINDOW_RANGE_FRAME_TEMPORAL_TYPE = 3588
+ER_WINDOW_RANGE_FRAME_NUMERIC_TYPE = 3589
+ER_WINDOW_RANGE_BOUND_NOT_CONSTANT = 3590
+ER_WINDOW_DUPLICATE_NAME = 3591
+ER_WINDOW_ILLEGAL_ORDER_BY = 3592
+ER_WINDOW_INVALID_WINDOW_FUNC_USE = 3593
+ER_WINDOW_INVALID_WINDOW_FUNC_ALIAS_USE = 3594
+ER_WINDOW_NESTED_WINDOW_FUNC_USE_IN_WINDOW_SPEC = 3595
+ER_WINDOW_ROWS_INTERVAL_USE = 3596
+ER_WINDOW_NO_GROUP_ORDER = 3597
+ER_WINDOW_EXPLAIN_JSON = 3598
+ER_WINDOW_FUNCTION_IGNORES_FRAME = 3599
+ER_WL9236_NOW_UNUSED = 3600
+ER_INVALID_NO_OF_ARGS = 3601
+ER_FIELD_IN_GROUPING_NOT_GROUP_BY = 3602
+ER_TOO_LONG_TABLESPACE_COMMENT = 3603
+ER_ENGINE_CANT_DROP_TABLE = 3604
+ER_ENGINE_CANT_DROP_MISSING_TABLE = 3605
+ER_TABLESPACE_DUP_FILENAME = 3606
+ER_DB_DROP_RMDIR2 = 3607
+ER_IMP_NO_FILES_MATCHED = 3608
+ER_IMP_SCHEMA_DOES_NOT_EXIST = 3609
+ER_IMP_TABLE_ALREADY_EXISTS = 3610
+ER_IMP_INCOMPATIBLE_MYSQLD_VERSION = 3611
+ER_IMP_INCOMPATIBLE_DD_VERSION = 3612
+ER_IMP_INCOMPATIBLE_SDI_VERSION = 3613
+ER_WARN_INVALID_HINT = 3614
+ER_VAR_DOES_NOT_EXIST = 3615
+ER_LONGITUDE_OUT_OF_RANGE = 3616
+ER_LATITUDE_OUT_OF_RANGE = 3617
+ER_NOT_IMPLEMENTED_FOR_GEOGRAPHIC_SRS = 3618
+ER_ILLEGAL_PRIVILEGE_LEVEL = 3619
+ER_NO_SYSTEM_VIEW_ACCESS = 3620
+ER_COMPONENT_FILTER_FLABBERGASTED = 3621
+ER_PART_EXPR_TOO_LONG = 3622
+ER_UDF_DROP_DYNAMICALLY_REGISTERED = 3623
+ER_UNABLE_TO_STORE_COLUMN_STATISTICS = 3624
+ER_UNABLE_TO_UPDATE_COLUMN_STATISTICS = 3625
+ER_UNABLE_TO_DROP_COLUMN_STATISTICS = 3626
+ER_UNABLE_TO_BUILD_HISTOGRAM = 3627
+ER_MANDATORY_ROLE = 3628
+ER_MISSING_TABLESPACE_FILE = 3629
+ER_PERSIST_ONLY_ACCESS_DENIED_ERROR = 3630
+ER_CMD_NEED_SUPER = 3631
+ER_PATH_IN_DATADIR = 3632
+ER_DDL_IN_PROGRESS = 3633
+ER_TOO_MANY_CONCURRENT_CLONES = 3634
+ER_APPLIER_LOG_EVENT_VALIDATION_ERROR = 3635
+ER_CTE_MAX_RECURSION_DEPTH = 3636
+ER_NOT_HINT_UPDATABLE_VARIABLE = 3637
+ER_CREDENTIALS_CONTRADICT_TO_HISTORY = 3638
+ER_WARNING_PASSWORD_HISTORY_CLAUSES_VOID = 3639
+ER_CLIENT_DOES_NOT_SUPPORT = 3640
+ER_I_S_SKIPPED_TABLESPACE = 3641
+ER_TABLESPACE_ENGINE_MISMATCH = 3642
+ER_WRONG_SRID_FOR_COLUMN = 3643
+ER_CANNOT_ALTER_SRID_DUE_TO_INDEX = 3644
+ER_WARN_BINLOG_PARTIAL_UPDATES_DISABLED = 3645
+ER_WARN_BINLOG_V1_ROW_EVENTS_DISABLED = 3646
+ER_WARN_BINLOG_PARTIAL_UPDATES_SUGGESTS_PARTIAL_IMAGES = 3647
+ER_COULD_NOT_APPLY_JSON_DIFF = 3648
+ER_CORRUPTED_JSON_DIFF = 3649
+ER_RESOURCE_GROUP_EXISTS = 3650
+ER_RESOURCE_GROUP_NOT_EXISTS = 3651
+ER_INVALID_VCPU_ID = 3652
+ER_INVALID_VCPU_RANGE = 3653
+ER_INVALID_THREAD_PRIORITY = 3654
+ER_DISALLOWED_OPERATION = 3655
+ER_RESOURCE_GROUP_BUSY = 3656
+ER_RESOURCE_GROUP_DISABLED = 3657
+ER_FEATURE_UNSUPPORTED = 3658
+ER_ATTRIBUTE_IGNORED = 3659
+ER_INVALID_THREAD_ID = 3660
+ER_RESOURCE_GROUP_BIND_FAILED = 3661
+ER_INVALID_USE_OF_FORCE_OPTION = 3662
+ER_GROUP_REPLICATION_COMMAND_FAILURE = 3663
+ER_SDI_OPERATION_FAILED = 3664
+ER_MISSING_JSON_TABLE_VALUE = 3665
+ER_WRONG_JSON_TABLE_VALUE = 3666
+ER_TF_MUST_HAVE_ALIAS = 3667
+ER_TF_FORBIDDEN_JOIN_TYPE = 3668
+ER_JT_VALUE_OUT_OF_RANGE = 3669
+ER_JT_MAX_NESTED_PATH = 3670
+ER_PASSWORD_EXPIRATION_NOT_SUPPORTED_BY_AUTH_METHOD = 3671
+ER_INVALID_GEOJSON_CRS_NOT_TOP_LEVEL = 3672
+ER_BAD_NULL_ERROR_NOT_IGNORED = 3673
+WARN_USELESS_SPATIAL_INDEX = 3674
+ER_DISK_FULL_NOWAIT = 3675
+ER_PARSE_ERROR_IN_DIGEST_FN = 3676
+ER_UNDISCLOSED_PARSE_ERROR_IN_DIGEST_FN = 3677
+ER_SCHEMA_DIR_EXISTS = 3678
+ER_SCHEMA_DIR_MISSING = 3679
+ER_SCHEMA_DIR_CREATE_FAILED = 3680
+ER_SCHEMA_DIR_UNKNOWN = 3681
+ER_ONLY_IMPLEMENTED_FOR_SRID_0_AND_4326 = 3682
+ER_BINLOG_EXPIRE_LOG_DAYS_AND_SECS_USED_TOGETHER = 3683
+ER_REGEXP_BUFFER_OVERFLOW = 3684
+ER_REGEXP_ILLEGAL_ARGUMENT = 3685
+ER_REGEXP_INDEX_OUTOFBOUNDS_ERROR = 3686
+ER_REGEXP_INTERNAL_ERROR = 3687
+ER_REGEXP_RULE_SYNTAX = 3688
+ER_REGEXP_BAD_ESCAPE_SEQUENCE = 3689
+ER_REGEXP_UNIMPLEMENTED = 3690
+ER_REGEXP_MISMATCHED_PAREN = 3691
+ER_REGEXP_BAD_INTERVAL = 3692
+ER_REGEXP_MAX_LT_MIN = 3693
+ER_REGEXP_INVALID_BACK_REF = 3694
+ER_REGEXP_LOOK_BEHIND_LIMIT = 3695
+ER_REGEXP_MISSING_CLOSE_BRACKET = 3696
+ER_REGEXP_INVALID_RANGE = 3697
+ER_REGEXP_STACK_OVERFLOW = 3698
+ER_REGEXP_TIME_OUT = 3699
+ER_REGEXP_PATTERN_TOO_BIG = 3700
+ER_CANT_SET_ERROR_LOG_SERVICE = 3701
+ER_EMPTY_PIPELINE_FOR_ERROR_LOG_SERVICE = 3702
+ER_COMPONENT_FILTER_DIAGNOSTICS = 3703
+ER_NOT_IMPLEMENTED_FOR_CARTESIAN_SRS = 3704
+ER_NOT_IMPLEMENTED_FOR_PROJECTED_SRS = 3705
+ER_NONPOSITIVE_RADIUS = 3706
+ER_RESTART_SERVER_FAILED = 3707
+ER_SRS_MISSING_MANDATORY_ATTRIBUTE = 3708
+ER_SRS_MULTIPLE_ATTRIBUTE_DEFINITIONS = 3709
+ER_SRS_NAME_CANT_BE_EMPTY_OR_WHITESPACE = 3710
+ER_SRS_ORGANIZATION_CANT_BE_EMPTY_OR_WHITESPACE = 3711
+ER_SRS_ID_ALREADY_EXISTS = 3712
+ER_WARN_SRS_ID_ALREADY_EXISTS = 3713
+ER_CANT_MODIFY_SRID_0 = 3714
+ER_WARN_RESERVED_SRID_RANGE = 3715
+ER_CANT_MODIFY_SRS_USED_BY_COLUMN = 3716
+ER_SRS_INVALID_CHARACTER_IN_ATTRIBUTE = 3717
+ER_SRS_ATTRIBUTE_STRING_TOO_LONG = 3718
+ER_DEPRECATED_UTF8_ALIAS = 3719
+ER_DEPRECATED_NATIONAL = 3720
+ER_INVALID_DEFAULT_UTF8MB4_COLLATION = 3721
+ER_UNABLE_TO_COLLECT_INSTANCE_LOG_STATUS = 3722
+ER_RESERVED_TABLESPACE_NAME = 3723
+ER_UNABLE_TO_SET_OPTION = 3724
+ER_SLAVE_POSSIBLY_DIVERGED_AFTER_DDL = 3725
+ER_PARSER_TRACE = 10000
+ER_BOOTSTRAP_CANT_THREAD = 10001
+ER_TRIGGER_INVALID_VALUE = 10002
+ER_OPT_WRONG_TREE = 10003
+ER_DD_FAILSAFE = 10004
+ER_DD_NO_WRITES_NO_REPOPULATION = 10005
+ER_DD_VERSION_FOUND = 10006
+ER_DD_VERSION_INSTALLED = 10007
+ER_DD_VERSION_UNSUPPORTED = 10008
+ER_LOG_SYSLOG_FACILITY_FAIL = 10009
+ER_LOG_SYSLOG_CANNOT_OPEN = 10010
+ER_LOG_SLOW_CANNOT_OPEN = 10011
+ER_LOG_GENERAL_CANNOT_OPEN = 10012
+ER_LOG_CANNOT_WRITE = 10013
+ER_RPL_ZOMBIE_ENCOUNTERED = 10014
+ER_RPL_GTID_TABLE_CANNOT_OPEN = 10015
+ER_SYSTEM_SCHEMA_NOT_FOUND = 10016
+ER_DD_INIT_UPGRADE_FAILED = 10017
+ER_VIEW_UNKNOWN_CHARSET_OR_COLLATION = 10018
+ER_DD_VIEW_CANT_ALLOC_CHARSET = 10019
+ER_DD_INIT_FAILED = 10020
+ER_DD_UPDATING_PLUGIN_MD_FAILED = 10021
+ER_DD_POPULATING_TABLES_FAILED = 10022
+ER_DD_VIEW_CANT_CREATE = 10023
+ER_DD_METADATA_NOT_FOUND = 10024
+ER_DD_CACHE_NOT_EMPTY_AT_SHUTDOWN = 10025
+ER_DD_OBJECT_REMAINS = 10026
+ER_DD_OBJECT_REMAINS_IN_RELEASER = 10027
+ER_DD_OBJECT_RELEASER_REMAINS = 10028
+ER_DD_CANT_GET_OBJECT_KEY = 10029
+ER_DD_CANT_CREATE_OBJECT_KEY = 10030
+ER_CANT_CREATE_HANDLE_MGR_THREAD = 10031
+ER_RPL_REPO_HAS_GAPS = 10032
+ER_INVALID_VALUE_FOR_ENFORCE_GTID_CONSISTENCY = 10033
+ER_CHANGED_ENFORCE_GTID_CONSISTENCY = 10034
+ER_CHANGED_GTID_MODE = 10035
+ER_DISABLED_STORAGE_ENGINE_AS_DEFAULT = 10036
+ER_DEBUG_SYNC_HIT = 10037
+ER_DEBUG_SYNC_EXECUTED = 10038
+ER_DEBUG_SYNC_THREAD_MAX = 10039
+ER_DEBUG_SYNC_OOM = 10040
+ER_CANT_INIT_TC_LOG = 10041
+ER_EVENT_CANT_INIT_QUEUE = 10042
+ER_EVENT_PURGING_QUEUE = 10043
+ER_EVENT_LAST_EXECUTION = 10044
+ER_EVENT_MESSAGE_STACK = 10045
+ER_EVENT_EXECUTION_FAILED = 10046
+ER_CANT_INIT_SCHEDULER_THREAD = 10047
+ER_SCHEDULER_STOPPED = 10048
+ER_CANT_CREATE_SCHEDULER_THREAD = 10049
+ER_SCHEDULER_WAITING = 10050
+ER_SCHEDULER_STARTED = 10051
+ER_SCHEDULER_STOPPING_FAILED_TO_GET_EVENT = 10052
+ER_SCHEDULER_STOPPING_FAILED_TO_CREATE_WORKER = 10053
+ER_SCHEDULER_KILLING = 10054
+ER_UNABLE_TO_RESOLVE_IP = 10055
+ER_UNABLE_TO_RESOLVE_HOSTNAME = 10056
+ER_HOSTNAME_RESEMBLES_IPV4 = 10057
+ER_HOSTNAME_DOESNT_RESOLVE_TO = 10058
+ER_ADDRESSES_FOR_HOSTNAME_HEADER = 10059
+ER_ADDRESSES_FOR_HOSTNAME_LIST_ITEM = 10060
+ER_TRG_WITHOUT_DEFINER = 10061
+ER_TRG_NO_CLIENT_CHARSET = 10062
+ER_PARSING_VIEW = 10063
+ER_COMPONENTS_INFRASTRUCTURE_BOOTSTRAP = 10064
+ER_COMPONENTS_INFRASTRUCTURE_SHUTDOWN = 10065
+ER_COMPONENTS_PERSIST_LOADER_BOOTSTRAP = 10066
+ER_DEPART_WITH_GRACE = 10067
+ER_CA_SELF_SIGNED = 10068
+ER_SSL_LIBRARY_ERROR = 10069
+ER_NO_THD_NO_UUID = 10070
+ER_UUID_SALT = 10071
+ER_UUID_IS = 10072
+ER_UUID_INVALID = 10073
+ER_UUID_SCRUB = 10074
+ER_CREATING_NEW_UUID = 10075
+ER_CANT_CREATE_UUID = 10076
+ER_UNKNOWN_UNSUPPORTED_STORAGE_ENGINE = 10077
+ER_SECURE_AUTH_VALUE_UNSUPPORTED = 10078
+ER_INVALID_INSTRUMENT = 10079
+ER_INNODB_MANDATORY = 10080
+OBSOLETE_ER_INNODB_CANNOT_BE_IGNORED = 10081
+ER_OLD_PASSWORDS_NO_MIDDLE_GROUND = 10082
+ER_VERBOSE_REQUIRES_HELP = 10083
+ER_POINTLESS_WITHOUT_SLOWLOG = 10084
+ER_WASTEFUL_NET_BUFFER_SIZE = 10085
+ER_DEPRECATED_TIMESTAMP_IMPLICIT_DEFAULTS = 10086
+ER_FT_BOOL_SYNTAX_INVALID = 10087
+ER_CREDENTIALLESS_AUTO_USER_BAD = 10088
+ER_CONNECTION_HANDLING_OOM = 10089
+ER_THREAD_HANDLING_OOM = 10090
+ER_CANT_CREATE_TEST_FILE = 10091
+ER_CANT_CREATE_PID_FILE = 10092
+ER_CANT_REMOVE_PID_FILE = 10093
+ER_CANT_CREATE_SHUTDOWN_THREAD = 10094
+ER_SEC_FILE_PRIV_CANT_ACCESS_DIR = 10095
+ER_SEC_FILE_PRIV_IGNORED = 10096
+ER_SEC_FILE_PRIV_EMPTY = 10097
+ER_SEC_FILE_PRIV_NULL = 10098
+ER_SEC_FILE_PRIV_DIRECTORY_INSECURE = 10099
+ER_SEC_FILE_PRIV_CANT_STAT = 10100
+ER_SEC_FILE_PRIV_DIRECTORY_PERMISSIONS = 10101
+ER_SEC_FILE_PRIV_ARGUMENT_TOO_LONG = 10102
+ER_CANT_CREATE_NAMED_PIPES_THREAD = 10103
+ER_CANT_CREATE_TCPIP_THREAD = 10104
+ER_CANT_CREATE_SHM_THREAD = 10105
+ER_CANT_CREATE_INTERRUPT_THREAD = 10106
+ER_WRITABLE_CONFIG_REMOVED = 10107
+ER_CORE_VALUES = 10108
+ER_WRONG_DATETIME_SPEC = 10109
+ER_RPL_BINLOG_FILTERS_OOM = 10110
+ER_KEYCACHE_OOM = 10111
+ER_CONFIRMING_THE_FUTURE = 10112
+ER_BACK_IN_TIME = 10113
+ER_FUTURE_DATE = 10114
+ER_UNSUPPORTED_DATE = 10115
+ER_STARTING_AS = 10116
+ER_SHUTTING_DOWN_SLAVE_THREADS = 10117
+ER_DISCONNECTING_REMAINING_CLIENTS = 10118
+ER_ABORTING = 10119
+ER_BINLOG_END = 10120
+ER_CALL_ME_LOCALHOST = 10121
+ER_USER_REQUIRES_ROOT = 10122
+ER_REALLY_RUN_AS_ROOT = 10123
+ER_USER_WHAT_USER = 10124
+ER_TRANSPORTS_WHAT_TRANSPORTS = 10125
+ER_FAIL_SETGID = 10126
+ER_FAIL_SETUID = 10127
+ER_FAIL_SETREGID = 10128
+ER_FAIL_SETREUID = 10129
+ER_FAIL_CHROOT = 10130
+ER_WIN_LISTEN_BUT_HOW = 10131
+ER_NOT_RIGHT_NOW = 10132
+ER_FIXING_CLIENT_CHARSET = 10133
+ER_OOM = 10134
+ER_FAILED_TO_LOCK_MEM = 10135
+ER_MYINIT_FAILED = 10136
+ER_BEG_INITFILE = 10137
+ER_END_INITFILE = 10138
+ER_CHANGED_MAX_OPEN_FILES = 10139
+ER_CANT_INCREASE_MAX_OPEN_FILES = 10140
+ER_CHANGED_MAX_CONNECTIONS = 10141
+ER_CHANGED_TABLE_OPEN_CACHE = 10142
+ER_THE_USER_ABIDES = 10143
+ER_RPL_CANT_ADD_DO_TABLE = 10144
+ER_RPL_CANT_ADD_IGNORE_TABLE = 10145
+ER_TRACK_VARIABLES_BOGUS = 10146
+ER_EXCESS_ARGUMENTS = 10147
+ER_VERBOSE_HINT = 10148
+ER_CANT_READ_ERRMSGS = 10149
+ER_CANT_INIT_DBS = 10150
+ER_LOG_OUTPUT_CONTRADICTORY = 10151
+ER_NO_CSV_NO_LOG_TABLES = 10152
+ER_RPL_REWRITEDB_MISSING_ARROW = 10153
+ER_RPL_REWRITEDB_EMPTY_FROM = 10154
+ER_RPL_REWRITEDB_EMPTY_TO = 10155
+ER_LOG_FILES_GIVEN_LOG_OUTPUT_IS_TABLE = 10156
+ER_LOG_FILE_INVALID = 10157
+ER_LOWER_CASE_TABLE_NAMES_CS_DD_ON_CI_FS_UNSUPPORTED = 10158
+ER_LOWER_CASE_TABLE_NAMES_USING_2 = 10159
+ER_LOWER_CASE_TABLE_NAMES_USING_0 = 10160
+ER_NEED_LOG_BIN = 10161
+ER_NEED_FILE_INSTEAD_OF_DIR = 10162
+ER_LOG_BIN_BETTER_WITH_NAME = 10163
+ER_BINLOG_NEEDS_SERVERID = 10164
+ER_RPL_CANT_MAKE_PATHS = 10165
+ER_CANT_INITIALIZE_GTID = 10166
+ER_CANT_INITIALIZE_EARLY_PLUGINS = 10167
+ER_CANT_INITIALIZE_BUILTIN_PLUGINS = 10168
+ER_CANT_INITIALIZE_DYNAMIC_PLUGINS = 10169
+ER_PERFSCHEMA_INIT_FAILED = 10170
+ER_STACKSIZE_UNEXPECTED = 10171
+ER_CANT_SET_DATADIR = 10172
+ER_CANT_STAT_DATADIR = 10173
+ER_CANT_CHOWN_DATADIR = 10174
+ER_CANT_SET_UP_PERSISTED_VALUES = 10175
+ER_CANT_SAVE_GTIDS = 10176
+ER_AUTH_CANT_SET_DEFAULT_PLUGIN = 10177
+ER_CANT_JOIN_SHUTDOWN_THREAD = 10178
+ER_CANT_HASH_DO_AND_IGNORE_RULES = 10179
+ER_CANT_OPEN_CA = 10180
+ER_CANT_ACCESS_CAPATH = 10181
+ER_SSL_TRYING_DATADIR_DEFAULTS = 10182
+ER_AUTO_OPTIONS_FAILED = 10183
+ER_CANT_INIT_TIMER = 10184
+ER_SERVERID_TOO_LARGE = 10185
+ER_DEFAULT_SE_UNAVAILABLE = 10186
+ER_CANT_OPEN_ERROR_LOG = 10187
+ER_INVALID_ERROR_LOG_NAME = 10188
+ER_RPL_INFINITY_DENIED = 10189
+ER_RPL_INFINITY_IGNORED = 10190
+ER_NDB_TABLES_NOT_READY = 10191
+ER_TABLE_CHECK_INTACT = 10192
+ER_DD_TABLESPACE_NOT_FOUND = 10193
+ER_DD_TRG_CONNECTION_COLLATION_MISSING = 10194
+ER_DD_TRG_DB_COLLATION_MISSING = 10195
+ER_DD_TRG_DEFINER_OOM = 10196
+ER_DD_TRG_FILE_UNREADABLE = 10197
+ER_TRG_CANT_PARSE = 10198
+ER_DD_TRG_CANT_ADD = 10199
+ER_DD_CANT_RESOLVE_VIEW = 10200
+ER_DD_VIEW_WITHOUT_DEFINER = 10201
+ER_PLUGIN_INIT_FAILED = 10202
+ER_RPL_TRX_DELEGATES_INIT_FAILED = 10203
+ER_RPL_BINLOG_STORAGE_DELEGATES_INIT_FAILED = 10204
+ER_RPL_BINLOG_TRANSMIT_DELEGATES_INIT_FAILED = 10205
+ER_RPL_BINLOG_RELAY_DELEGATES_INIT_FAILED = 10206
+ER_RPL_PLUGIN_FUNCTION_FAILED = 10207
+ER_SQL_HA_READ_FAILED = 10208
+ER_SR_BOGUS_VALUE = 10209
+ER_SR_INVALID_CONTEXT = 10210
+ER_READING_TABLE_FAILED = 10211
+ER_DES_FILE_WRONG_KEY = 10212
+ER_CANT_SET_PERSISTED = 10213
+ER_JSON_PARSE_ERROR = 10214
+ER_CONFIG_OPTION_WITHOUT_GROUP = 10215
+ER_VALGRIND_DO_QUICK_LEAK_CHECK = 10216
+ER_VALGRIND_COUNT_LEAKS = 10217
+ER_LOAD_DATA_INFILE_FAILED_IN_UNEXPECTED_WAY = 10218
+ER_UNKNOWN_ERROR_NUMBER = 10219
+ER_UDF_CANT_ALLOC_FOR_STRUCTURES = 10220
+ER_UDF_CANT_ALLOC_FOR_FUNCTION = 10221
+ER_UDF_INVALID_ROW_IN_FUNCTION_TABLE = 10222
+ER_UDF_CANT_OPEN_FUNCTION_TABLE = 10223
+ER_XA_RECOVER_FOUND_TRX_IN_SE = 10224
+ER_XA_RECOVER_FOUND_XA_TRX = 10225
+ER_XA_IGNORING_XID = 10226
+ER_XA_COMMITTING_XID = 10227
+ER_XA_ROLLING_BACK_XID = 10228
+ER_XA_STARTING_RECOVERY = 10229
+ER_XA_NO_MULTI_2PC_HEURISTIC_RECOVER = 10230
+ER_XA_RECOVER_EXPLANATION = 10231
+ER_XA_RECOVERY_DONE = 10232
+ER_TRX_GTID_COLLECT_REJECT = 10233
+ER_SQL_AUTHOR_DEFAULT_ROLES_FAIL = 10234
+ER_SQL_USER_TABLE_CREATE_WARNING = 10235
+ER_SQL_USER_TABLE_ALTER_WARNING = 10236
+ER_ROW_IN_WRONG_PARTITION_PLEASE_REPAIR = 10237
+ER_MYISAM_CRASHED_ERROR_IN_THREAD = 10238
+ER_MYISAM_CRASHED_ERROR_IN = 10239
+ER_TOO_MANY_STORAGE_ENGINES = 10240
+ER_SE_TYPECODE_CONFLICT = 10241
+ER_TRX_WRITE_SET_OOM = 10242
+ER_HANDLERTON_OOM = 10243
+ER_CONN_SHM_LISTENER = 10244
+ER_CONN_SHM_CANT_CREATE_SERVICE = 10245
+ER_CONN_SHM_CANT_CREATE_CONNECTION = 10246
+ER_CONN_PIP_CANT_CREATE_EVENT = 10247
+ER_CONN_PIP_CANT_CREATE_PIPE = 10248
+ER_CONN_PER_THREAD_NO_THREAD = 10249
+ER_CONN_TCP_NO_SOCKET = 10250
+ER_CONN_TCP_CREATED = 10251
+ER_CONN_TCP_ADDRESS = 10252
+ER_CONN_TCP_IPV6_AVAILABLE = 10253
+ER_CONN_TCP_IPV6_UNAVAILABLE = 10254
+ER_CONN_TCP_ERROR_WITH_STRERROR = 10255
+ER_CONN_TCP_CANT_RESOLVE_HOSTNAME = 10256
+ER_CONN_TCP_IS_THERE_ANOTHER_USING_PORT = 10257
+ER_CONN_UNIX_IS_THERE_ANOTHER_USING_SOCKET = 10258
+ER_CONN_UNIX_PID_CLAIMED_SOCKET_FILE = 10259
+ER_CONN_TCP_CANT_RESET_V6ONLY = 10260
+ER_CONN_TCP_BIND_RETRY = 10261
+ER_CONN_TPC_BIND_FAIL = 10262
+ER_CONN_TCP_IP_NOT_LOGGED = 10263
+ER_CONN_TCP_RESOLVE_INFO = 10264
+ER_CONN_TCP_START_FAIL = 10265
+ER_CONN_TCP_LISTEN_FAIL = 10266
+ER_CONN_UNIX_PATH_TOO_LONG = 10267
+ER_CONN_UNIX_LOCK_FILE_FAIL = 10268
+ER_CONN_UNIX_NO_FD = 10269
+ER_CONN_UNIX_NO_BIND_NO_START = 10270
+ER_CONN_UNIX_LISTEN_FAILED = 10271
+ER_CONN_UNIX_LOCK_FILE_GIVING_UP = 10272
+ER_CONN_UNIX_LOCK_FILE_CANT_CREATE = 10273
+ER_CONN_UNIX_LOCK_FILE_CANT_OPEN = 10274
+ER_CONN_UNIX_LOCK_FILE_CANT_READ = 10275
+ER_CONN_UNIX_LOCK_FILE_EMPTY = 10276
+ER_CONN_UNIX_LOCK_FILE_PIDLESS = 10277
+ER_CONN_UNIX_LOCK_FILE_CANT_WRITE = 10278
+ER_CONN_UNIX_LOCK_FILE_CANT_DELETE = 10279
+ER_CONN_UNIX_LOCK_FILE_CANT_SYNC = 10280
+ER_CONN_UNIX_LOCK_FILE_CANT_CLOSE = 10281
+ER_CONN_SOCKET_SELECT_FAILED = 10282
+ER_CONN_SOCKET_ACCEPT_FAILED = 10283
+ER_AUTH_RSA_CANT_FIND = 10284
+ER_AUTH_RSA_CANT_PARSE = 10285
+ER_AUTH_RSA_CANT_READ = 10286
+ER_AUTH_RSA_FILES_NOT_FOUND = 10287
+ER_CONN_ATTR_TRUNCATED = 10288
+ER_X509_CIPHERS_MISMATCH = 10289
+ER_X509_ISSUER_MISMATCH = 10290
+ER_X509_SUBJECT_MISMATCH = 10291
+ER_AUTH_CANT_ACTIVATE_ROLE = 10292
+ER_X509_NEEDS_RSA_PRIVKEY = 10293
+ER_X509_CANT_WRITE_KEY = 10294
+ER_X509_CANT_CHMOD_KEY = 10295
+ER_X509_CANT_READ_CA_KEY = 10296
+ER_X509_CANT_READ_CA_CERT = 10297
+ER_X509_CANT_CREATE_CERT = 10298
+ER_X509_CANT_WRITE_CERT = 10299
+ER_AUTH_CANT_CREATE_RSA_PAIR = 10300
+ER_AUTH_CANT_WRITE_PRIVKEY = 10301
+ER_AUTH_CANT_WRITE_PUBKEY = 10302
+ER_AUTH_SSL_CONF_PREVENTS_CERT_GENERATION = 10303
+ER_AUTH_USING_EXISTING_CERTS = 10304
+ER_AUTH_CERTS_SAVED_TO_DATADIR = 10305
+ER_AUTH_CERT_GENERATION_DISABLED = 10306
+ER_AUTH_RSA_CONF_PREVENTS_KEY_GENERATION = 10307
+ER_AUTH_KEY_GENERATION_SKIPPED_PAIR_PRESENT = 10308
+ER_AUTH_KEYS_SAVED_TO_DATADIR = 10309
+ER_AUTH_KEY_GENERATION_DISABLED = 10310
+ER_AUTHCACHE_PROXIES_PRIV_SKIPPED_NEEDS_RESOLVE = 10311
+ER_AUTHCACHE_PLUGIN_MISSING = 10312
+ER_AUTHCACHE_PLUGIN_CONFIG = 10313
+OBSOLETE_ER_AUTHCACHE_ROLE_TABLES_DODGY = 10314
+ER_AUTHCACHE_USER_SKIPPED_NEEDS_RESOLVE = 10315
+ER_AUTHCACHE_USER_TABLE_DODGY = 10316
+ER_AUTHCACHE_USER_IGNORED_DEPRECATED_PASSWORD = 10317
+ER_AUTHCACHE_USER_IGNORED_NEEDS_PLUGIN = 10318
+ER_AUTHCACHE_USER_IGNORED_INVALID_PASSWORD = 10319
+ER_AUTHCACHE_EXPIRED_PASSWORD_UNSUPPORTED = 10320
+ER_NO_SUPER_WITHOUT_USER_PLUGIN = 10321
+ER_AUTHCACHE_DB_IGNORED_EMPTY_NAME = 10322
+ER_AUTHCACHE_DB_SKIPPED_NEEDS_RESOLVE = 10323
+ER_AUTHCACHE_DB_ENTRY_LOWERCASED_REVOKE_WILL_FAIL = 10324
+ER_AUTHCACHE_TABLE_PROXIES_PRIV_MISSING = 10325
+ER_AUTHCACHE_CANT_OPEN_AND_LOCK_PRIVILEGE_TABLES = 10326
+ER_AUTHCACHE_CANT_INIT_GRANT_SUBSYSTEM = 10327
+ER_AUTHCACHE_PROCS_PRIV_SKIPPED_NEEDS_RESOLVE = 10328
+ER_AUTHCACHE_PROCS_PRIV_ENTRY_IGNORED_BAD_ROUTINE_TYPE = 10329
+ER_AUTHCACHE_TABLES_PRIV_SKIPPED_NEEDS_RESOLVE = 10330
+ER_USER_NOT_IN_EXTRA_USERS_BINLOG_POSSIBLY_INCOMPLETE = 10331
+ER_DD_SCHEMA_NOT_FOUND = 10332
+ER_DD_TABLE_NOT_FOUND = 10333
+ER_DD_SE_INIT_FAILED = 10334
+ER_DD_ABORTING_PARTIAL_UPGRADE = 10335
+ER_DD_FRM_EXISTS_FOR_TABLE = 10336
+ER_DD_CREATED_FOR_UPGRADE = 10337
+ER_ERRMSG_CANT_FIND_FILE = 10338
+ER_ERRMSG_LOADING_55_STYLE = 10339
+ER_ERRMSG_MISSING_IN_FILE = 10340
+ER_ERRMSG_OOM = 10341
+ER_ERRMSG_CANT_READ = 10342
+ER_TABLE_INCOMPATIBLE_DECIMAL_FIELD = 10343
+ER_TABLE_INCOMPATIBLE_YEAR_FIELD = 10344
+ER_INVALID_CHARSET_AND_DEFAULT_IS_MB = 10345
+ER_TABLE_WRONG_KEY_DEFINITION = 10346
+ER_CANT_OPEN_FRM_FILE = 10347
+ER_CANT_READ_FRM_FILE = 10348
+ER_TABLE_CREATED_WITH_DIFFERENT_VERSION = 10349
+ER_VIEW_UNPARSABLE = 10350
+ER_FILE_TYPE_UNKNOWN = 10351
+ER_INVALID_INFO_IN_FRM = 10352
+ER_CANT_OPEN_AND_LOCK_PRIVILEGE_TABLES = 10353
+ER_AUDIT_PLUGIN_DOES_NOT_SUPPORT_AUDIT_AUTH_EVENTS = 10354
+ER_AUDIT_PLUGIN_HAS_INVALID_DATA = 10355
+ER_TZ_OOM_INITIALIZING_TIME_ZONES = 10356
+ER_TZ_CANT_OPEN_AND_LOCK_TIME_ZONE_TABLE = 10357
+ER_TZ_OOM_LOADING_LEAP_SECOND_TABLE = 10358
+ER_TZ_TOO_MANY_LEAPS_IN_LEAP_SECOND_TABLE = 10359
+ER_TZ_ERROR_LOADING_LEAP_SECOND_TABLE = 10360
+ER_TZ_UNKNOWN_OR_ILLEGAL_DEFAULT_TIME_ZONE = 10361
+ER_TZ_CANT_FIND_DESCRIPTION_FOR_TIME_ZONE = 10362
+ER_TZ_CANT_FIND_DESCRIPTION_FOR_TIME_ZONE_ID = 10363
+ER_TZ_TRANSITION_TYPE_TABLE_TYPE_TOO_LARGE = 10364
+ER_TZ_TRANSITION_TYPE_TABLE_ABBREVIATIONS_EXCEED_SPACE = 10365
+ER_TZ_TRANSITION_TYPE_TABLE_LOAD_ERROR = 10366
+ER_TZ_TRANSITION_TABLE_TOO_MANY_TRANSITIONS = 10367
+ER_TZ_TRANSITION_TABLE_BAD_TRANSITION_TYPE = 10368
+ER_TZ_TRANSITION_TABLE_LOAD_ERROR = 10369
+ER_TZ_NO_TRANSITION_TYPES_IN_TIME_ZONE = 10370
+ER_TZ_OOM_LOADING_TIME_ZONE_DESCRIPTION = 10371
+ER_TZ_CANT_BUILD_MKTIME_MAP = 10372
+ER_TZ_OOM_WHILE_LOADING_TIME_ZONE = 10373
+ER_TZ_OOM_WHILE_SETTING_TIME_ZONE = 10374
+ER_SLAVE_SQL_THREAD_STOPPED_UNTIL_CONDITION_BAD = 10375
+ER_SLAVE_SQL_THREAD_STOPPED_UNTIL_POSITION_REACHED = 10376
+ER_SLAVE_SQL_THREAD_STOPPED_BEFORE_GTIDS_ALREADY_APPLIED = 10377
+ER_SLAVE_SQL_THREAD_STOPPED_BEFORE_GTIDS_REACHED = 10378
+ER_SLAVE_SQL_THREAD_STOPPED_AFTER_GTIDS_REACHED = 10379
+ER_SLAVE_SQL_THREAD_STOPPED_GAP_TRX_PROCESSED = 10380
+ER_GROUP_REPLICATION_PLUGIN_NOT_INSTALLED = 10381
+ER_GTID_ALREADY_ADDED_BY_USER = 10382
+ER_FAILED_TO_DELETE_FROM_GTID_EXECUTED_TABLE = 10383
+ER_FAILED_TO_COMPRESS_GTID_EXECUTED_TABLE = 10384
+ER_FAILED_TO_COMPRESS_GTID_EXECUTED_TABLE_OOM = 10385
+ER_FAILED_TO_INIT_THREAD_ATTR_FOR_GTID_TABLE_COMPRESSION = 10386
+ER_FAILED_TO_CREATE_GTID_TABLE_COMPRESSION_THREAD = 10387
+ER_FAILED_TO_JOIN_GTID_TABLE_COMPRESSION_THREAD = 10388
+ER_NPIPE_FAILED_TO_INIT_SECURITY_DESCRIPTOR = 10389
+ER_NPIPE_FAILED_TO_SET_SECURITY_DESCRIPTOR = 10390
+ER_NPIPE_PIPE_ALREADY_IN_USE = 10391
+ER_NDB_SLAVE_SAW_EPOCH_LOWER_THAN_PREVIOUS_ON_START = 10392
+ER_NDB_SLAVE_SAW_EPOCH_LOWER_THAN_PREVIOUS = 10393
+ER_NDB_SLAVE_SAW_ALREADY_COMMITTED_EPOCH = 10394
+ER_NDB_SLAVE_PREVIOUS_EPOCH_NOT_COMMITTED = 10395
+ER_NDB_SLAVE_MISSING_DATA_FOR_TIMESTAMP_COLUMN = 10396
+ER_NDB_SLAVE_LOGGING_EXCEPTIONS_TO = 10397
+ER_NDB_SLAVE_LOW_EPOCH_RESOLUTION = 10398
+ER_NDB_INFO_FOUND_UNEXPECTED_FIELD_TYPE = 10399
+ER_NDB_INFO_FAILED_TO_CREATE_NDBINFO = 10400
+ER_NDB_INFO_FAILED_TO_INIT_NDBINFO = 10401
+ER_NDB_CLUSTER_WRONG_NUMBER_OF_FUNCTION_ARGUMENTS = 10402
+ER_NDB_CLUSTER_SCHEMA_INFO = 10403
+ER_NDB_CLUSTER_GENERIC_MESSAGE = 10404
+ER_RPL_CANT_OPEN_INFO_TABLE = 10405
+ER_RPL_CANT_SCAN_INFO_TABLE = 10406
+ER_RPL_CORRUPTED_INFO_TABLE = 10407
+ER_RPL_CORRUPTED_KEYS_IN_INFO_TABLE = 10408
+ER_RPL_WORKER_ID_IS = 10409
+ER_RPL_INCONSISTENT_TIMESTAMPS_IN_TRX = 10410
+ER_RPL_INCONSISTENT_SEQUENCE_NO_IN_TRX = 10411
+ER_RPL_CHANNELS_REQUIRE_TABLES_AS_INFO_REPOSITORIES = 10412
+ER_RPL_CHANNELS_REQUIRE_NON_ZERO_SERVER_ID = 10413
+ER_RPL_REPO_SHOULD_BE_TABLE = 10414
+ER_RPL_ERROR_CREATING_MASTER_INFO = 10415
+ER_RPL_ERROR_CHANGING_MASTER_INFO_REPO_TYPE = 10416
+ER_RPL_CHANGING_RELAY_LOG_INFO_REPO_TYPE_FAILED_DUE_TO_GAPS = 10417
+ER_RPL_ERROR_CREATING_RELAY_LOG_INFO = 10418
+ER_RPL_ERROR_CHANGING_RELAY_LOG_INFO_REPO_TYPE = 10419
+ER_RPL_FAILED_TO_DELETE_FROM_SLAVE_WORKERS_INFO_REPOSITORY = 10420
+ER_RPL_FAILED_TO_RESET_STATE_IN_SLAVE_INFO_REPOSITORY = 10421
+ER_RPL_ERROR_CHECKING_REPOSITORY = 10422
+ER_RPL_SLAVE_GENERIC_MESSAGE = 10423
+ER_RPL_SLAVE_COULD_NOT_CREATE_CHANNEL_LIST = 10424
+ER_RPL_MULTISOURCE_REQUIRES_TABLE_TYPE_REPOSITORIES = 10425
+ER_RPL_SLAVE_FAILED_TO_INIT_A_MASTER_INFO_STRUCTURE = 10426
+ER_RPL_SLAVE_FAILED_TO_INIT_MASTER_INFO_STRUCTURE = 10427
+ER_RPL_SLAVE_FAILED_TO_CREATE_CHANNEL_FROM_MASTER_INFO = 10428
+ER_RPL_FAILED_TO_CREATE_NEW_INFO_FILE = 10429
+ER_RPL_FAILED_TO_CREATE_CACHE_FOR_INFO_FILE = 10430
+ER_RPL_FAILED_TO_OPEN_INFO_FILE = 10431
+ER_RPL_GTID_MEMORY_FINALLY_AVAILABLE = 10432
+ER_SERVER_COST_UNKNOWN_COST_CONSTANT = 10433
+ER_SERVER_COST_INVALID_COST_CONSTANT = 10434
+ER_ENGINE_COST_UNKNOWN_COST_CONSTANT = 10435
+ER_ENGINE_COST_UNKNOWN_STORAGE_ENGINE = 10436
+ER_ENGINE_COST_INVALID_DEVICE_TYPE_FOR_SE = 10437
+ER_ENGINE_COST_INVALID_CONST_CONSTANT_FOR_SE_AND_DEVICE = 10438
+ER_SERVER_COST_FAILED_TO_READ = 10439
+ER_ENGINE_COST_FAILED_TO_READ = 10440
+ER_FAILED_TO_OPEN_COST_CONSTANT_TABLES = 10441
+ER_RPL_UNSUPPORTED_UNIGNORABLE_EVENT_IN_STREAM = 10442
+ER_RPL_GTID_LOG_EVENT_IN_STREAM = 10443
+ER_RPL_UNEXPECTED_BEGIN_IN_STREAM = 10444
+ER_RPL_UNEXPECTED_COMMIT_ROLLBACK_OR_XID_LOG_EVENT_IN_STREAM = 10445
+ER_RPL_UNEXPECTED_XA_ROLLBACK_IN_STREAM = 10446
+ER_EVENT_EXECUTION_FAILED_CANT_AUTHENTICATE_USER = 10447
+ER_EVENT_EXECUTION_FAILED_USER_LOST_EVEN_PRIVILEGE = 10448
+ER_EVENT_ERROR_DURING_COMPILATION = 10449
+ER_EVENT_DROPPING = 10450
+ER_NDB_SCHEMA_GENERIC_MESSAGE = 10451
+ER_RPL_INCOMPATIBLE_DECIMAL_IN_RBR = 10452
+ER_INIT_ROOT_WITHOUT_PASSWORD = 10453
+ER_INIT_GENERATING_TEMP_PASSWORD_FOR_ROOT = 10454
+ER_INIT_CANT_OPEN_BOOTSTRAP_FILE = 10455
+ER_INIT_BOOTSTRAP_COMPLETE = 10456
+ER_INIT_DATADIR_NOT_EMPTY_WONT_INITIALIZE = 10457
+ER_INIT_DATADIR_EXISTS_WONT_INITIALIZE = 10458
+ER_INIT_DATADIR_EXISTS_AND_PATH_TOO_LONG_WONT_INITIALIZE = 10459
+ER_INIT_DATADIR_EXISTS_AND_NOT_WRITABLE_WONT_INITIALIZE = 10460
+ER_INIT_CREATING_DD = 10461
+ER_RPL_BINLOG_STARTING_DUMP = 10462
+ER_RPL_BINLOG_MASTER_SENDS_HEARTBEAT = 10463
+ER_RPL_BINLOG_SKIPPING_REMAINING_HEARTBEAT_INFO = 10464
+ER_RPL_BINLOG_MASTER_USES_CHECKSUM_AND_SLAVE_CANT = 10465
+ER_NDB_QUERY_FAILED = 10466
+ER_KILLING_THREAD = 10467
+ER_DETACHING_SESSION_LEFT_BY_PLUGIN = 10468
+ER_CANT_DETACH_SESSION_LEFT_BY_PLUGIN = 10469
+ER_DETACHED_SESSIONS_LEFT_BY_PLUGIN = 10470
+ER_FAILED_TO_DECREMENT_NUMBER_OF_THREADS = 10471
+ER_PLUGIN_DID_NOT_DEINITIALIZE_THREADS = 10472
+ER_KILLED_THREADS_OF_PLUGIN = 10473
+ER_NDB_SLAVE_MAX_REPLICATED_EPOCH_UNKNOWN = 10474
+ER_NDB_SLAVE_MAX_REPLICATED_EPOCH_SET_TO = 10475
+ER_NDB_NODE_ID_AND_MANAGEMENT_SERVER_INFO = 10476
+ER_NDB_DISCONNECT_INFO = 10477
+ER_NDB_COLUMN_DEFAULTS_DIFFER = 10478
+ER_NDB_COLUMN_SHOULD_NOT_HAVE_NATIVE_DEFAULT = 10479
+ER_NDB_FIELD_INFO = 10480
+ER_NDB_COLUMN_INFO = 10481
+ER_NDB_OOM_IN_FIX_UNIQUE_INDEX_ATTR_ORDER = 10482
+ER_NDB_SLAVE_MALFORMED_EVENT_RECEIVED_ON_TABLE = 10483
+ER_NDB_SLAVE_CONFLICT_FUNCTION_REQUIRES_ROLE = 10484
+ER_NDB_SLAVE_CONFLICT_DETECTION_REQUIRES_TRANSACTION_IDS = 10485
+ER_NDB_SLAVE_BINLOG_MISSING_INFO_FOR_CONFLICT_DETECTION = 10486
+ER_NDB_ERROR_IN_READAUTOINCREMENTVALUE = 10487
+ER_NDB_FOUND_UNCOMMITTED_AUTOCOMMIT = 10488
+ER_NDB_SLAVE_TOO_MANY_RETRIES = 10489
+ER_NDB_SLAVE_ERROR_IN_UPDATE_CREATE_INFO = 10490
+ER_NDB_SLAVE_CANT_ALLOCATE_TABLE_SHARE = 10491
+ER_NDB_BINLOG_ERROR_INFO_FROM_DA = 10492
+ER_NDB_BINLOG_CREATE_TABLE_EVENT = 10493
+ER_NDB_BINLOG_FAILED_CREATE_TABLE_EVENT_OPERATIONS = 10494
+ER_NDB_BINLOG_RENAME_EVENT = 10495
+ER_NDB_BINLOG_FAILED_CREATE_EVENT_OPERATIONS_DURING_RENAME = 10496
+ER_NDB_UNEXPECTED_RENAME_TYPE = 10497
+ER_NDB_ERROR_IN_GET_AUTO_INCREMENT = 10498
+ER_NDB_CREATING_SHARE_IN_OPEN = 10499
+ER_NDB_TABLE_OPENED_READ_ONLY = 10500
+ER_NDB_INITIALIZE_GIVEN_CLUSTER_PLUGIN_DISABLED = 10501
+ER_NDB_BINLOG_FORMAT_CHANGED_FROM_STMT_TO_MIXED = 10502
+ER_NDB_TRAILING_SHARE_RELEASED_BY_CLOSE_CACHED_TABLES = 10503
+ER_NDB_SHARE_ALREADY_EXISTS = 10504
+ER_NDB_HANDLE_TRAILING_SHARE_INFO = 10505
+ER_NDB_CLUSTER_GET_SHARE_INFO = 10506
+ER_NDB_CLUSTER_REAL_FREE_SHARE_INFO = 10507
+ER_NDB_CLUSTER_REAL_FREE_SHARE_DROP_FAILED = 10508
+ER_NDB_CLUSTER_FREE_SHARE_INFO = 10509
+ER_NDB_CLUSTER_MARK_SHARE_DROPPED_INFO = 10510
+ER_NDB_CLUSTER_MARK_SHARE_DROPPED_DESTROYING_SHARE = 10511
+ER_NDB_CLUSTER_OOM_THD_NDB = 10512
+ER_NDB_BINLOG_NDB_TABLES_INITIALLY_READ_ONLY = 10513
+ER_NDB_UTIL_THREAD_OOM = 10514
+ER_NDB_ILLEGAL_VALUE_FOR_NDB_RECV_THREAD_CPU_MASK = 10515
+ER_NDB_TOO_MANY_CPUS_IN_NDB_RECV_THREAD_CPU_MASK = 10516
+ER_DBUG_CHECK_SHARES_OPEN = 10517
+ER_DBUG_CHECK_SHARES_INFO = 10518
+ER_DBUG_CHECK_SHARES_DROPPED = 10519
+ER_INVALID_OR_OLD_TABLE_OR_DB_NAME = 10520
+ER_TC_RECOVERING_AFTER_CRASH_USING = 10521
+ER_TC_CANT_AUTO_RECOVER_WITH_TC_HEURISTIC_RECOVER = 10522
+ER_TC_BAD_MAGIC_IN_TC_LOG = 10523
+ER_TC_NEED_N_SE_SUPPORTING_2PC_FOR_RECOVERY = 10524
+ER_TC_RECOVERY_FAILED_THESE_ARE_YOUR_OPTIONS = 10525
+ER_TC_HEURISTIC_RECOVERY_MODE = 10526
+ER_TC_HEURISTIC_RECOVERY_FAILED = 10527
+ER_TC_RESTART_WITHOUT_TC_HEURISTIC_RECOVER = 10528
+ER_RPL_SLAVE_FAILED_TO_CREATE_OR_RECOVER_INFO_REPOSITORIES = 10529
+ER_RPL_SLAVE_AUTO_POSITION_IS_1_AND_GTID_MODE_IS_OFF = 10530
+ER_RPL_SLAVE_CANT_START_SLAVE_FOR_CHANNEL = 10531
+ER_RPL_SLAVE_CANT_STOP_SLAVE_FOR_CHANNEL = 10532
+ER_RPL_RECOVERY_NO_ROTATE_EVENT_FROM_MASTER = 10533
+ER_RPL_RECOVERY_ERROR_READ_RELAY_LOG = 10534
+ER_RPL_RECOVERY_ERROR_FREEING_IO_CACHE = 10535
+ER_RPL_RECOVERY_SKIPPED_GROUP_REPLICATION_CHANNEL = 10536
+ER_RPL_RECOVERY_ERROR = 10537
+ER_RPL_RECOVERY_IO_ERROR_READING_RELAY_LOG_INDEX = 10538
+ER_RPL_RECOVERY_FILE_MASTER_POS_INFO = 10539
+ER_RPL_RECOVERY_REPLICATE_SAME_SERVER_ID_REQUIRES_POSITION = 10540
+ER_RPL_MTS_RECOVERY_STARTING_COORDINATOR = 10541
+ER_RPL_MTS_RECOVERY_FAILED_TO_START_COORDINATOR = 10542
+ER_RPL_MTS_AUTOMATIC_RECOVERY_FAILED = 10543
+ER_RPL_MTS_RECOVERY_CANT_OPEN_RELAY_LOG = 10544
+ER_RPL_MTS_RECOVERY_SUCCESSFUL = 10545
+ER_RPL_SERVER_ID_MISSING = 10546
+ER_RPL_CANT_CREATE_SLAVE_THREAD = 10547
+ER_RPL_SLAVE_IO_THREAD_WAS_KILLED = 10548
+ER_RPL_SLAVE_MASTER_UUID_HAS_CHANGED = 10549
+ER_RPL_SLAVE_USES_CHECKSUM_AND_MASTER_PRE_50 = 10550
+ER_RPL_SLAVE_SECONDS_BEHIND_MASTER_DUBIOUS = 10551
+ER_RPL_SLAVE_CANT_FLUSH_MASTER_INFO_FILE = 10552
+ER_RPL_SLAVE_REPORT_HOST_TOO_LONG = 10553
+ER_RPL_SLAVE_REPORT_USER_TOO_LONG = 10554
+ER_RPL_SLAVE_REPORT_PASSWORD_TOO_LONG = 10555
+ER_RPL_SLAVE_ERROR_RETRYING = 10556
+ER_RPL_SLAVE_ERROR_READING_FROM_SERVER = 10557
+ER_RPL_SLAVE_DUMP_THREAD_KILLED_BY_MASTER = 10558
+ER_RPL_MTS_STATISTICS = 10559
+ER_RPL_MTS_RECOVERY_COMPLETE = 10560
+ER_RPL_SLAVE_CANT_INIT_RELAY_LOG_POSITION = 10561
+ER_RPL_SLAVE_CONNECTED_TO_MASTER_REPLICATION_STARTED = 10562
+ER_RPL_SLAVE_IO_THREAD_KILLED = 10563
+ER_RPL_SLAVE_IO_THREAD_CANT_REGISTER_ON_MASTER = 10564
+ER_RPL_SLAVE_FORCING_TO_RECONNECT_IO_THREAD = 10565
+ER_RPL_SLAVE_ERROR_REQUESTING_BINLOG_DUMP = 10566
+ER_RPL_LOG_ENTRY_EXCEEDS_SLAVE_MAX_ALLOWED_PACKET = 10567
+ER_RPL_SLAVE_STOPPING_AS_MASTER_OOM = 10568
+ER_RPL_SLAVE_IO_THREAD_ABORTED_WAITING_FOR_RELAY_LOG_SPACE = 10569
+ER_RPL_SLAVE_IO_THREAD_EXITING = 10570
+ER_RPL_SLAVE_CANT_INITIALIZE_SLAVE_WORKER = 10571
+ER_RPL_MTS_GROUP_RECOVERY_RELAY_LOG_INFO_FOR_WORKER = 10572
+ER_RPL_ERROR_LOOKING_FOR_LOG = 10573
+ER_RPL_MTS_GROUP_RECOVERY_RELAY_LOG_INFO = 10574
+ER_RPL_CANT_FIND_FOLLOWUP_FILE = 10575
+ER_RPL_MTS_CHECKPOINT_PERIOD_DIFFERS_FROM_CNT = 10576
+ER_RPL_SLAVE_WORKER_THREAD_CREATION_FAILED = 10577
+ER_RPL_SLAVE_WORKER_THREAD_CREATION_FAILED_WITH_ERRNO = 10578
+ER_RPL_SLAVE_FAILED_TO_INIT_PARTITIONS_HASH = 10579
+ER_RPL_SLAVE_NDB_TABLES_NOT_AVAILABLE = 10580
+ER_RPL_SLAVE_SQL_THREAD_STARTING = 10581
+ER_RPL_SLAVE_SKIP_COUNTER_EXECUTED = 10582
+ER_RPL_SLAVE_ADDITIONAL_ERROR_INFO_FROM_DA = 10583
+ER_RPL_SLAVE_ERROR_INFO_FROM_DA = 10584
+ER_RPL_SLAVE_ERROR_LOADING_USER_DEFINED_LIBRARY = 10585
+ER_RPL_SLAVE_ERROR_RUNNING_QUERY = 10586
+ER_RPL_SLAVE_SQL_THREAD_EXITING = 10587
+ER_RPL_SLAVE_READ_INVALID_EVENT_FROM_MASTER = 10588
+ER_RPL_SLAVE_QUEUE_EVENT_FAILED_INVALID_CONFIGURATION = 10589
+ER_RPL_SLAVE_IO_THREAD_DETECTED_UNEXPECTED_EVENT_SEQUENCE = 10590
+ER_RPL_SLAVE_CANT_USE_CHARSET = 10591
+ER_RPL_SLAVE_CONNECTED_TO_MASTER_REPLICATION_RESUMED = 10592
+ER_RPL_SLAVE_NEXT_LOG_IS_ACTIVE = 10593
+ER_RPL_SLAVE_NEXT_LOG_IS_INACTIVE = 10594
+ER_RPL_SLAVE_SQL_THREAD_IO_ERROR_READING_EVENT = 10595
+ER_RPL_SLAVE_ERROR_READING_RELAY_LOG_EVENTS = 10596
+ER_SLAVE_CHANGE_MASTER_TO_EXECUTED = 10597
+ER_RPL_SLAVE_NEW_MASTER_INFO_NEEDS_REPOS_TYPE_OTHER_THAN_FILE = 10598
+ER_RPL_FAILED_TO_STAT_LOG_IN_INDEX = 10599
+ER_RPL_LOG_NOT_FOUND_WHILE_COUNTING_RELAY_LOG_SPACE = 10600
+ER_SLAVE_CANT_USE_TEMPDIR = 10601
+ER_RPL_RELAY_LOG_NEEDS_FILE_NOT_DIRECTORY = 10602
+ER_RPL_RELAY_LOG_INDEX_NEEDS_FILE_NOT_DIRECTORY = 10603
+ER_RPL_PLEASE_USE_OPTION_RELAY_LOG = 10604
+ER_RPL_OPEN_INDEX_FILE_FAILED = 10605
+ER_RPL_CANT_INITIALIZE_GTID_SETS_IN_RLI_INIT_INFO = 10606
+ER_RPL_CANT_OPEN_LOG_IN_RLI_INIT_INFO = 10607
+ER_RPL_ERROR_WRITING_RELAY_LOG_CONFIGURATION = 10608
+ER_NDB_OOM_GET_NDB_BLOBS_VALUE = 10609
+ER_NDB_THREAD_TIMED_OUT = 10610
+ER_NDB_TABLE_IS_NOT_DISTRIBUTED = 10611
+ER_NDB_CREATING_TABLE = 10612
+ER_NDB_FLUSHING_TABLE_INFO = 10613
+ER_NDB_CLEANING_STRAY_TABLES = 10614
+ER_NDB_DISCOVERED_MISSING_DB = 10615
+ER_NDB_DISCOVERED_REMAINING_DB = 10616
+ER_NDB_CLUSTER_FIND_ALL_DBS_RETRY = 10617
+ER_NDB_CLUSTER_FIND_ALL_DBS_FAIL = 10618
+ER_NDB_SKIPPING_SETUP_TABLE = 10619
+ER_NDB_FAILED_TO_SET_UP_TABLE = 10620
+ER_NDB_MISSING_FRM_DISCOVERING = 10621
+ER_NDB_MISMATCH_IN_FRM_DISCOVERING = 10622
+ER_NDB_BINLOG_CLEANING_UP_SETUP_LEFTOVERS = 10623
+ER_NDB_WAITING_INFO = 10624
+ER_NDB_WAITING_INFO_WITH_MAP = 10625
+ER_NDB_TIMEOUT_WHILE_DISTRIBUTING = 10626
+ER_NDB_NOT_WAITING_FOR_DISTRIBUTING = 10627
+ER_NDB_DISTRIBUTED_INFO = 10628
+ER_NDB_DISTRIBUTION_COMPLETE = 10629
+ER_NDB_SCHEMA_DISTRIBUTION_FAILED = 10630
+ER_NDB_SCHEMA_DISTRIBUTION_REPORTS_SUBSCRIBE = 10631
+ER_NDB_SCHEMA_DISTRIBUTION_REPORTS_UNSUBSCRIBE = 10632
+ER_NDB_BINLOG_CANT_DISCOVER_TABLE_FROM_SCHEMA_EVENT = 10633
+ER_NDB_BINLOG_SIGNALLING_UNKNOWN_VALUE = 10634
+ER_NDB_BINLOG_REPLY_TO = 10635
+ER_NDB_BINLOG_CANT_RELEASE_SLOCK = 10636
+ER_NDB_CANT_FIND_TABLE = 10637
+ER_NDB_DISCARDING_EVENT_NO_OBJ = 10638
+ER_NDB_DISCARDING_EVENT_ID_VERSION_MISMATCH = 10639
+ER_NDB_CLEAR_SLOCK_INFO = 10640
+ER_NDB_BINLOG_SKIPPING_LOCAL_TABLE = 10641
+ER_NDB_BINLOG_ONLINE_ALTER_RENAME = 10642
+ER_NDB_BINLOG_CANT_REOPEN_SHADOW_TABLE = 10643
+ER_NDB_BINLOG_ONLINE_ALTER_RENAME_COMPLETE = 10644
+ER_NDB_BINLOG_SKIPPING_DROP_OF_LOCAL_TABLE = 10645
+ER_NDB_BINLOG_SKIPPING_RENAME_OF_LOCAL_TABLE = 10646
+ER_NDB_BINLOG_SKIPPING_DROP_OF_DB_CONTAINING_LOCAL_TABLES = 10647
+ER_NDB_BINLOG_GOT_DIST_PRIV_EVENT_FLUSHING_PRIVILEGES = 10648
+ER_NDB_BINLOG_GOT_SCHEMA_EVENT = 10649
+ER_NDB_BINLOG_SKIPPING_OLD_SCHEMA_OPERATION = 10650
+ER_NDB_CLUSTER_FAILURE = 10651
+ER_NDB_TABLES_INITIALLY_READ_ONLY_ON_RECONNECT = 10652
+ER_NDB_IGNORING_UNKNOWN_EVENT = 10653
+ER_NDB_BINLOG_OPENING_INDEX = 10654
+ER_NDB_BINLOG_CANT_LOCK_NDB_BINLOG_INDEX = 10655
+ER_NDB_BINLOG_INJECTING_RANDOM_WRITE_FAILURE = 10656
+ER_NDB_BINLOG_CANT_WRITE_TO_NDB_BINLOG_INDEX = 10657
+ER_NDB_BINLOG_WRITING_TO_NDB_BINLOG_INDEX = 10658
+ER_NDB_BINLOG_CANT_COMMIT_TO_NDB_BINLOG_INDEX = 10659
+ER_NDB_BINLOG_WRITE_TO_NDB_BINLOG_INDEX_FAILED_AFTER_KILL = 10660
+ER_NDB_BINLOG_USING_SERVER_ID_0_SLAVES_WILL_NOT = 10661
+ER_NDB_SERVER_ID_RESERVED_OR_TOO_LARGE = 10662
+ER_NDB_BINLOG_NDB_LOG_TRANSACTION_ID_REQUIRES_V2_ROW_EVENTS = 10663
+ER_NDB_BINLOG_NDB_LOG_APPLY_STATUS_FORCING_FULL_USE_WRITE = 10664
+ER_NDB_BINLOG_GENERIC_MESSAGE = 10665
+ER_NDB_CONFLICT_GENERIC_MESSAGE = 10666
+ER_NDB_TRANS_DEPENDENCY_TRACKER_ERROR = 10667
+ER_NDB_CONFLICT_FN_PARSE_ERROR = 10668
+ER_NDB_CONFLICT_FN_SETUP_ERROR = 10669
+ER_NDB_BINLOG_FAILED_TO_GET_TABLE = 10670
+ER_NDB_BINLOG_NOT_LOGGING = 10671
+ER_NDB_BINLOG_CREATE_TABLE_EVENT_FAILED = 10672
+ER_NDB_BINLOG_CREATE_TABLE_EVENT_INFO = 10673
+ER_NDB_BINLOG_DISCOVER_TABLE_EVENT_INFO = 10674
+ER_NDB_BINLOG_BLOB_REQUIRES_PK = 10675
+ER_NDB_BINLOG_CANT_CREATE_EVENT_IN_DB = 10676
+ER_NDB_BINLOG_CANT_CREATE_EVENT_IN_DB_AND_CANT_DROP = 10677
+ER_NDB_BINLOG_CANT_CREATE_EVENT_IN_DB_DROPPED = 10678
+ER_NDB_BINLOG_DISCOVER_REUSING_OLD_EVENT_OPS = 10679
+ER_NDB_BINLOG_CREATING_NDBEVENTOPERATION_FAILED = 10680
+ER_NDB_BINLOG_CANT_CREATE_BLOB = 10681
+ER_NDB_BINLOG_NDBEVENT_EXECUTE_FAILED = 10682
+ER_NDB_CREATE_EVENT_OPS_LOGGING_INFO = 10683
+ER_NDB_BINLOG_CANT_DROP_EVENT_FROM_DB = 10684
+ER_NDB_TIMED_OUT_IN_DROP_TABLE = 10685
+ER_NDB_BINLOG_UNHANDLED_ERROR_FOR_TABLE = 10686
+ER_NDB_BINLOG_CLUSTER_FAILURE = 10687
+ER_NDB_BINLOG_UNKNOWN_NON_DATA_EVENT = 10688
+ER_NDB_BINLOG_INJECTOR_DISCARDING_ROW_EVENT_METADATA = 10689
+ER_NDB_REMAINING_OPEN_TABLES = 10690
+ER_NDB_REMAINING_OPEN_TABLE_INFO = 10691
+ER_NDB_COULD_NOT_GET_APPLY_STATUS_SHARE = 10692
+ER_NDB_BINLOG_SERVER_SHUTDOWN_DURING_NDB_CLUSTER_START = 10693
+ER_NDB_BINLOG_CLUSTER_RESTARTED_RESET_MASTER_SUGGESTED = 10694
+ER_NDB_BINLOG_CLUSTER_HAS_RECONNECTED = 10695
+ER_NDB_BINLOG_STARTING_LOG_AT_EPOCH = 10696
+ER_NDB_BINLOG_NDB_TABLES_WRITABLE = 10697
+ER_NDB_BINLOG_SHUTDOWN_DETECTED = 10698
+ER_NDB_BINLOG_LOST_SCHEMA_CONNECTION_WAITING = 10699
+ER_NDB_BINLOG_LOST_SCHEMA_CONNECTION_CONTINUING = 10700
+ER_NDB_BINLOG_ERROR_HANDLING_SCHEMA_EVENT = 10701
+ER_NDB_BINLOG_CANT_INJECT_APPLY_STATUS_WRITE_ROW = 10702
+ER_NDB_BINLOG_ERROR_DURING_GCI_ROLLBACK = 10703
+ER_NDB_BINLOG_ERROR_DURING_GCI_COMMIT = 10704
+ER_NDB_BINLOG_LATEST_TRX_IN_EPOCH_NOT_IN_BINLOG = 10705
+ER_NDB_BINLOG_RELEASING_EXTRA_SHARE_REFERENCES = 10706
+ER_NDB_BINLOG_REMAINING_OPEN_TABLES = 10707
+ER_NDB_BINLOG_REMAINING_OPEN_TABLE_INFO = 10708
+ER_TREE_CORRUPT_PARENT_SHOULD_POINT_AT_PARENT = 10709
+ER_TREE_CORRUPT_ROOT_SHOULD_BE_BLACK = 10710
+ER_TREE_CORRUPT_2_CONSECUTIVE_REDS = 10711
+ER_TREE_CORRUPT_RIGHT_IS_LEFT = 10712
+ER_TREE_CORRUPT_INCORRECT_BLACK_COUNT = 10713
+ER_WRONG_COUNT_FOR_ORIGIN = 10714
+ER_WRONG_COUNT_FOR_KEY = 10715
+ER_WRONG_COUNT_OF_ELEMENTS = 10716
+ER_RPL_ERROR_READING_SLAVE_WORKER_CONFIGURATION = 10717
+ER_RPL_ERROR_WRITING_SLAVE_WORKER_CONFIGURATION = 10718
+ER_RPL_FAILED_TO_OPEN_RELAY_LOG = 10719
+ER_RPL_WORKER_CANT_READ_RELAY_LOG = 10720
+ER_RPL_WORKER_CANT_FIND_NEXT_RELAY_LOG = 10721
+ER_RPL_MTS_SLAVE_COORDINATOR_HAS_WAITED = 10722
+ER_BINLOG_FAILED_TO_WRITE_DROP_FOR_TEMP_TABLES = 10723
+ER_BINLOG_OOM_WRITING_DELETE_WHILE_OPENING_HEAP_TABLE = 10724
+ER_FAILED_TO_REPAIR_TABLE = 10725
+ER_FAILED_TO_REMOVE_TEMP_TABLE = 10726
+ER_SYSTEM_TABLE_NOT_TRANSACTIONAL = 10727
+ER_RPL_ERROR_WRITING_MASTER_CONFIGURATION = 10728
+ER_RPL_ERROR_READING_MASTER_CONFIGURATION = 10729
+ER_RPL_SSL_INFO_IN_MASTER_INFO_IGNORED = 10730
+ER_PLUGIN_FAILED_DEINITIALIZATION = 10731
+ER_PLUGIN_HAS_NONZERO_REFCOUNT_AFTER_DEINITIALIZATION = 10732
+ER_PLUGIN_SHUTTING_DOWN_PLUGIN = 10733
+ER_PLUGIN_REGISTRATION_FAILED = 10734
+ER_PLUGIN_CANT_OPEN_PLUGIN_TABLE = 10735
+ER_PLUGIN_CANT_LOAD = 10736
+ER_PLUGIN_LOAD_PARAMETER_TOO_LONG = 10737
+ER_PLUGIN_FORCING_SHUTDOWN = 10738
+ER_PLUGIN_HAS_NONZERO_REFCOUNT_AFTER_SHUTDOWN = 10739
+ER_PLUGIN_UNKNOWN_VARIABLE_TYPE = 10740
+ER_PLUGIN_VARIABLE_SET_READ_ONLY = 10741
+ER_PLUGIN_VARIABLE_MISSING_NAME = 10742
+ER_PLUGIN_VARIABLE_NOT_ALLOCATED_THREAD_LOCAL = 10743
+ER_PLUGIN_OOM = 10744
+ER_PLUGIN_BAD_OPTIONS = 10745
+ER_PLUGIN_PARSING_OPTIONS_FAILED = 10746
+ER_PLUGIN_DISABLED = 10747
+ER_PLUGIN_HAS_CONFLICTING_SYSTEM_VARIABLES = 10748
+ER_PLUGIN_CANT_SET_PERSISTENT_OPTIONS = 10749
+ER_MY_NET_WRITE_FAILED_FALLING_BACK_ON_STDERR = 10750
+ER_RETRYING_REPAIR_WITHOUT_QUICK = 10751
+ER_RETRYING_REPAIR_WITH_KEYCACHE = 10752
+ER_FOUND_ROWS_WHILE_REPAIRING = 10753
+ER_ERROR_DURING_OPTIMIZE_TABLE = 10754
+ER_ERROR_ENABLING_KEYS = 10755
+ER_CHECKING_TABLE = 10756
+ER_RECOVERING_TABLE = 10757
+ER_CANT_CREATE_TABLE_SHARE_FROM_FRM = 10758
+ER_CANT_LOCK_TABLE = 10759
+ER_CANT_ALLOC_TABLE_OBJECT = 10760
+ER_CANT_CREATE_HANDLER_OBJECT_FOR_TABLE = 10761
+ER_CANT_SET_HANDLER_REFERENCE_FOR_TABLE = 10762
+ER_CANT_LOCK_TABLESPACE = 10763
+ER_CANT_UPGRADE_GENERATED_COLUMNS_TO_DD = 10764
+ER_DD_ERROR_CREATING_ENTRY = 10765
+ER_DD_CANT_FETCH_TABLE_DATA = 10766
+ER_DD_CANT_FIX_SE_DATA = 10767
+ER_DD_CANT_CREATE_SP = 10768
+ER_CANT_OPEN_DB_OPT_USING_DEFAULT_CHARSET = 10769
+ER_CANT_CREATE_CACHE_FOR_DB_OPT = 10770
+ER_CANT_IDENTIFY_CHARSET_USING_DEFAULT = 10771
+ER_DB_OPT_NOT_FOUND_USING_DEFAULT_CHARSET = 10772
+ER_EVENT_CANT_GET_TIMEZONE_FROM_FIELD = 10773
+ER_EVENT_CANT_FIND_TIMEZONE = 10774
+ER_EVENT_CANT_GET_CHARSET = 10775
+ER_EVENT_CANT_GET_COLLATION = 10776
+ER_EVENT_CANT_OPEN_TABLE_MYSQL_EVENT = 10777
+ER_CANT_PARSE_STORED_ROUTINE_BODY = 10778
+ER_CANT_OPEN_TABLE_MYSQL_PROC = 10779
+ER_CANT_READ_TABLE_MYSQL_PROC = 10780
+ER_FILE_EXISTS_DURING_UPGRADE = 10781
+ER_CANT_OPEN_DATADIR_AFTER_UPGRADE_FAILURE = 10782
+ER_CANT_SET_PATH_FOR = 10783
+ER_CANT_OPEN_DIR = 10784
+ER_NDB_EMPTY_NODEID_IN_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10785
+ER_NDB_CANT_PARSE_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10786
+ER_NDB_INVALID_NODEID_IN_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10787
+ER_NDB_DUPLICATE_NODEID_IN_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10788
+ER_NDB_POOL_SIZE_MUST_MATCH_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10789
+ER_NDB_NODEID_NOT_FIRST_IN_NDB_CLUSTER_CONNECTION_POOL_NODEIDS = 10790
+ER_NDB_USING_NODEID = 10791
+ER_NDB_CANT_ALLOC_GLOBAL_NDB_CLUSTER_CONNECTION = 10792
+ER_NDB_CANT_ALLOC_GLOBAL_NDB_OBJECT = 10793
+ER_NDB_USING_NODEID_LIST = 10794
+ER_NDB_CANT_ALLOC_NDB_CLUSTER_CONNECTION = 10795
+ER_NDB_STARTING_CONNECT_THREAD = 10796
+ER_NDB_NODE_INFO = 10797
+ER_NDB_CANT_START_CONNECT_THREAD = 10798
+ER_NDB_GENERIC_ERROR = 10799
+ER_NDB_CPU_MASK_TOO_SHORT = 10800
+ER_EVENT_ERROR_CREATING_QUERY_TO_WRITE_TO_BINLOG = 10801
+ER_EVENT_SCHEDULER_ERROR_LOADING_FROM_DB = 10802
+ER_EVENT_SCHEDULER_ERROR_GETTING_EVENT_OBJECT = 10803
+ER_EVENT_SCHEDULER_GOT_BAD_DATA_FROM_TABLE = 10804
+ER_EVENT_CANT_GET_LOCK_FOR_DROPPING_EVENT = 10805
+ER_EVENT_UNABLE_TO_DROP_EVENT = 10806
+ER_BINLOG_ATTACHING_THREAD_MEMORY_FINALLY_AVAILABLE = 10807
+ER_BINLOG_CANT_RESIZE_CACHE = 10808
+ER_BINLOG_FILE_BEING_READ_NOT_PURGED = 10809
+ER_BINLOG_IO_ERROR_READING_HEADER = 10810
+ER_BINLOG_CANT_OPEN_LOG = 10811
+ER_BINLOG_CANT_CREATE_CACHE_FOR_LOG = 10812
+ER_BINLOG_FILE_EXTENSION_NUMBER_EXHAUSTED = 10813
+ER_BINLOG_FILE_NAME_TOO_LONG = 10814
+ER_BINLOG_FILE_EXTENSION_NUMBER_RUNNING_LOW = 10815
+ER_BINLOG_CANT_OPEN_FOR_LOGGING = 10816
+ER_BINLOG_FAILED_TO_SYNC_INDEX_FILE = 10817
+ER_BINLOG_ERROR_READING_GTIDS_FROM_RELAY_LOG = 10818
+ER_BINLOG_EVENTS_READ_FROM_RELAY_LOG_INFO = 10819
+ER_BINLOG_ERROR_READING_GTIDS_FROM_BINARY_LOG = 10820
+ER_BINLOG_EVENTS_READ_FROM_BINLOG_INFO = 10821
+ER_BINLOG_CANT_GENERATE_NEW_FILE_NAME = 10822
+ER_BINLOG_FAILED_TO_SYNC_INDEX_FILE_IN_OPEN = 10823
+ER_BINLOG_CANT_USE_FOR_LOGGING = 10824
+ER_BINLOG_FAILED_TO_CLOSE_INDEX_FILE_WHILE_REBUILDING = 10825
+ER_BINLOG_FAILED_TO_DELETE_INDEX_FILE_WHILE_REBUILDING = 10826
+ER_BINLOG_FAILED_TO_RENAME_INDEX_FILE_WHILE_REBUILDING = 10827
+ER_BINLOG_FAILED_TO_OPEN_INDEX_FILE_AFTER_REBUILDING = 10828
+ER_BINLOG_CANT_APPEND_LOG_TO_TMP_INDEX = 10829
+ER_BINLOG_CANT_LOCATE_OLD_BINLOG_OR_RELAY_LOG_FILES = 10830
+ER_BINLOG_CANT_DELETE_FILE = 10831
+ER_BINLOG_CANT_SET_TMP_INDEX_NAME = 10832
+ER_BINLOG_FAILED_TO_OPEN_TEMPORARY_INDEX_FILE = 10833
+ER_BINLOG_ERROR_GETTING_NEXT_LOG_FROM_INDEX = 10834
+ER_BINLOG_CANT_OPEN_TMP_INDEX = 10835
+ER_BINLOG_CANT_COPY_INDEX_TO_TMP = 10836
+ER_BINLOG_CANT_CLOSE_TMP_INDEX = 10837
+ER_BINLOG_CANT_MOVE_TMP_TO_INDEX = 10838
+ER_BINLOG_PURGE_LOGS_CALLED_WITH_FILE_NOT_IN_INDEX = 10839
+ER_BINLOG_PURGE_LOGS_CANT_SYNC_INDEX_FILE = 10840
+ER_BINLOG_PURGE_LOGS_CANT_COPY_TO_REGISTER_FILE = 10841
+ER_BINLOG_PURGE_LOGS_CANT_FLUSH_REGISTER_FILE = 10842
+ER_BINLOG_PURGE_LOGS_CANT_UPDATE_INDEX_FILE = 10843
+ER_BINLOG_PURGE_LOGS_FAILED_TO_PURGE_LOG = 10844
+ER_BINLOG_FAILED_TO_SET_PURGE_INDEX_FILE_NAME = 10845
+ER_BINLOG_FAILED_TO_OPEN_REGISTER_FILE = 10846
+ER_BINLOG_FAILED_TO_REINIT_REGISTER_FILE = 10847
+ER_BINLOG_FAILED_TO_READ_REGISTER_FILE = 10848
+ER_CANT_STAT_FILE = 10849
+ER_BINLOG_CANT_DELETE_LOG_FILE_DOES_INDEX_MATCH_FILES = 10850
+ER_BINLOG_CANT_DELETE_FILE_AND_READ_BINLOG_INDEX = 10851
+ER_BINLOG_FAILED_TO_DELETE_LOG_FILE = 10852
+ER_BINLOG_LOGGING_INCIDENT_TO_STOP_SLAVES = 10853
+ER_BINLOG_CANT_FIND_LOG_IN_INDEX = 10854
+ER_BINLOG_RECOVERING_AFTER_CRASH_USING = 10855
+ER_BINLOG_CANT_OPEN_CRASHED_BINLOG = 10856
+ER_BINLOG_CANT_TRIM_CRASHED_BINLOG = 10857
+ER_BINLOG_CRASHED_BINLOG_TRIMMED = 10858
+ER_BINLOG_CANT_CLEAR_IN_USE_FLAG_FOR_CRASHED_BINLOG = 10859
+ER_BINLOG_FAILED_TO_RUN_AFTER_SYNC_HOOK = 10860
+ER_TURNING_LOGGING_OFF_FOR_THE_DURATION = 10861
+ER_BINLOG_FAILED_TO_RUN_AFTER_FLUSH_HOOK = 10862
+ER_BINLOG_CRASH_RECOVERY_FAILED = 10863
+ER_BINLOG_WARNING_SUPPRESSED = 10864
+ER_NDB_LOG_ENTRY = 10865
+ER_NDB_LOG_ENTRY_WITH_PREFIX = 10866
+ER_NDB_BINLOG_CANT_CREATE_PURGE_THD = 10867
+ER_INNODB_UNKNOWN_COLLATION = 10868
+ER_INNODB_INVALID_LOG_GROUP_HOME_DIR = 10869
+ER_INNODB_INVALID_INNODB_UNDO_DIRECTORY = 10870
+ER_INNODB_ILLEGAL_COLON_IN_POOL = 10871
+ER_INNODB_INVALID_PAGE_SIZE = 10872
+ER_INNODB_DIRTY_WATER_MARK_NOT_LOW = 10873
+ER_INNODB_IO_CAPACITY_EXCEEDS_MAX = 10874
+ER_INNODB_FILES_SAME = 10875
+ER_INNODB_UNREGISTERED_TRX_ACTIVE = 10876
+ER_INNODB_CLOSING_CONNECTION_ROLLS_BACK = 10877
+ER_INNODB_TRX_XLATION_TABLE_OOM = 10878
+ER_INNODB_CANT_FIND_INDEX_IN_INNODB_DD = 10879
+ER_INNODB_INDEX_COLUMN_INFO_UNLIKE_MYSQLS = 10880
+ER_INNODB_CANT_OPEN_TABLE = 10881
+ER_INNODB_CANT_BUILD_INDEX_XLATION_TABLE_FOR = 10882
+ER_INNODB_PK_NOT_IN_MYSQL = 10883
+ER_INNODB_PK_ONLY_IN_MYSQL = 10884
+ER_INNODB_CLUSTERED_INDEX_PRIVATE = 10885
+ER_INNODB_PARTITION_TABLE_LOWERCASED = 10886
+ER_ERRMSG_REPLACEMENT_DODGY = 10887
+ER_ERRMSG_REPLACEMENTS_FAILED = 10888
+ER_NPIPE_CANT_CREATE = 10889
+ER_PARTITION_MOVE_CREATED_DUPLICATE_ROW_PLEASE_FIX = 10890
+ER_AUDIT_CANT_ABORT_COMMAND = 10891
+ER_AUDIT_CANT_ABORT_EVENT = 10892
+ER_AUDIT_WARNING = 10893
+ER_NDB_NUMBER_OF_CHANNELS = 10894
+ER_NDB_SLAVE_PARALLEL_WORKERS = 10895
+ER_NDB_DISTRIBUTING_ERR = 10896
+ER_RPL_SLAVE_INSECURE_CHANGE_MASTER = 10897
+ER_RPL_SLAVE_FLUSH_RELAY_LOGS_NOT_ALLOWED = 10898
+ER_RPL_SLAVE_INCORRECT_CHANNEL = 10899
+ER_FAILED_TO_FIND_DL_ENTRY = 10900
+ER_FAILED_TO_OPEN_SHARED_LIBRARY = 10901
+ER_THREAD_PRIORITY_IGNORED = 10902
+ER_BINLOG_CACHE_SIZE_TOO_LARGE = 10903
+ER_BINLOG_STMT_CACHE_SIZE_TOO_LARGE = 10904
+ER_FAILED_TO_GENERATE_UNIQUE_LOGFILE = 10905
+ER_FAILED_TO_READ_FILE = 10906
+ER_FAILED_TO_WRITE_TO_FILE = 10907
+ER_BINLOG_UNSAFE_MESSAGE_AND_STATEMENT = 10908
+ER_FORCE_CLOSE_THREAD = 10909
+ER_SERVER_SHUTDOWN_COMPLETE = 10910
+ER_RPL_CANT_HAVE_SAME_BASENAME = 10911
+ER_RPL_GTID_MODE_REQUIRES_ENFORCE_GTID_CONSISTENCY_ON = 10912
+ER_WARN_NO_SERVERID_SPECIFIED = 10913
+ER_ABORTING_USER_CONNECTION = 10914
+ER_SQL_MODE_MERGED_WITH_STRICT_MODE = 10915
+ER_GTID_PURGED_WAS_UPDATED = 10916
+ER_GTID_EXECUTED_WAS_UPDATED = 10917
+ER_DEPRECATE_MSG_WITH_REPLACEMENT = 10918
+ER_TRG_CREATION_CTX_NOT_SET = 10919
+ER_FILE_HAS_OLD_FORMAT = 10920
+ER_VIEW_CREATION_CTX_NOT_SET = 10921
+ER_TABLE_NAME_CAUSES_TOO_LONG_PATH = 10922
+ER_TABLE_UPGRADE_REQUIRED = 10923
+ER_GET_ERRNO_FROM_STORAGE_ENGINE = 10924
+ER_ACCESS_DENIED_ERROR_WITHOUT_PASSWORD = 10925
+ER_ACCESS_DENIED_ERROR_WITH_PASSWORD = 10926
+ER_ACCESS_DENIED_FOR_USER_ACCOUNT_LOCKED = 10927
+ER_MUST_CHANGE_EXPIRED_PASSWORD = 10928
+ER_SYSTEM_TABLES_NOT_SUPPORTED_BY_STORAGE_ENGINE = 10929
+ER_FILESORT_TERMINATED = 10930
+ER_SERVER_STARTUP_MSG = 10931
+ER_FAILED_TO_FIND_LOCALE_NAME = 10932
+ER_FAILED_TO_FIND_COLLATION_NAME = 10933
+ER_SERVER_OUT_OF_RESOURCES = 10934
+ER_SERVER_OUTOFMEMORY = 10935
+ER_INVALID_COLLATION_FOR_CHARSET = 10936
+ER_CANT_START_ERROR_LOG_SERVICE = 10937
+ER_CREATING_NEW_UUID_FIRST_START = 10938
+ER_FAILED_TO_GET_ABSOLUTE_PATH = 10939
+ER_PERFSCHEMA_COMPONENTS_INFRASTRUCTURE_BOOTSTRAP = 10940
+ER_PERFSCHEMA_COMPONENTS_INFRASTRUCTURE_SHUTDOWN = 10941
+ER_DUP_FD_OPEN_FAILED = 10942
+ER_SYSTEM_VIEW_INIT_FAILED = 10943
+ER_RESOURCE_GROUP_POST_INIT_FAILED = 10944
+ER_RESOURCE_GROUP_SUBSYSTEM_INIT_FAILED = 10945
+ER_FAILED_START_MYSQLD_DAEMON = 10946
+ER_CANNOT_CHANGE_TO_ROOT_DIR = 10947
+ER_PERSISTENT_PRIVILEGES_BOOTSTRAP = 10948
+ER_BASEDIR_SET_TO = 10949
+ER_RPL_FILTER_ADD_WILD_DO_TABLE_FAILED = 10950
+ER_RPL_FILTER_ADD_WILD_IGNORE_TABLE_FAILED = 10951
+ER_PRIVILEGE_SYSTEM_INIT_FAILED = 10952
+ER_CANNOT_SET_LOG_ERROR_SERVICES = 10953
+ER_PERFSCHEMA_TABLES_INIT_FAILED = 10954
+ER_TX_EXTRACTION_ALGORITHM_FOR_BINLOG_TX_DEPEDENCY_TRACKING = 10955
+ER_INVALID_REPLICATION_TIMESTAMPS = 10956
+ER_RPL_TIMESTAMPS_RETURNED_TO_NORMAL = 10957
+ER_BINLOG_FILE_OPEN_FAILED = 10958
+ER_BINLOG_EVENT_WRITE_TO_STMT_CACHE_FAILED = 10959
+ER_SLAVE_RELAY_LOG_TRUNCATE_INFO = 10960
+ER_SLAVE_RELAY_LOG_PURGE_FAILED = 10961
+ER_RPL_SLAVE_FILTER_CREATE_FAILED = 10962
+ER_RPL_SLAVE_GLOBAL_FILTERS_COPY_FAILED = 10963
+ER_RPL_SLAVE_RESET_FILTER_OPTIONS = 10964
+ER_MISSING_GRANT_SYSTEM_TABLE = 10965
+ER_MISSING_ACL_SYSTEM_TABLE = 10966
+ER_ANONYMOUS_AUTH_ID_NOT_ALLOWED_IN_MANDATORY_ROLES = 10967
+ER_UNKNOWN_AUTH_ID_IN_MANDATORY_ROLE = 10968
+ER_WRITE_ROW_TO_PARTITION_FAILED = 10969
+ER_RESOURCE_GROUP_METADATA_UPDATE_SKIPPED = 10970
+ER_FAILED_TO_PERSIST_RESOURCE_GROUP_METADATA = 10971
+ER_FAILED_TO_DESERIALIZE_RESOURCE_GROUP = 10972
+ER_FAILED_TO_UPDATE_RESOURCE_GROUP = 10973
+ER_RESOURCE_GROUP_VALIDATION_FAILED = 10974
+ER_FAILED_TO_ALLOCATE_MEMORY_FOR_RESOURCE_GROUP = 10975
+ER_FAILED_TO_ALLOCATE_MEMORY_FOR_RESOURCE_GROUP_HASH = 10976
+ER_FAILED_TO_ADD_RESOURCE_GROUP_TO_MAP = 10977
+ER_RESOURCE_GROUP_IS_DISABLED = 10978
+ER_FAILED_TO_APPLY_RESOURCE_GROUP_CONTROLLER = 10979
+ER_FAILED_TO_ACQUIRE_LOCK_ON_RESOURCE_GROUP = 10980
+ER_PFS_NOTIFICATION_FUNCTION_REGISTER_FAILED = 10981
+ER_RES_GRP_SET_THR_AFFINITY_FAILED = 10982
+ER_RES_GRP_SET_THR_AFFINITY_TO_CPUS_FAILED = 10983
+ER_RES_GRP_THD_UNBIND_FROM_CPU_FAILED = 10984
+ER_RES_GRP_SET_THREAD_PRIORITY_FAILED = 10985
+ER_RES_GRP_FAILED_TO_DETERMINE_NICE_CAPABILITY = 10986
+ER_RES_GRP_FAILED_TO_GET_THREAD_HANDLE = 10987
+ER_RES_GRP_GET_THREAD_PRIO_NOT_SUPPORTED = 10988
+ER_RES_GRP_FAILED_DETERMINE_CPU_COUNT = 10989
+ER_RES_GRP_FEATURE_NOT_AVAILABLE = 10990
+ER_RES_GRP_INVALID_THREAD_PRIORITY = 10991
+ER_RES_GRP_SOLARIS_PROCESSOR_BIND_TO_CPUID_FAILED = 10992
+ER_RES_GRP_SOLARIS_PROCESSOR_BIND_TO_THREAD_FAILED = 10993
+ER_RES_GRP_SOLARIS_PROCESSOR_AFFINITY_FAILED = 10994
+ER_DD_UPGRADE_RENAME_IDX_STATS_FILE_FAILED = 10995
+ER_DD_UPGRADE_DD_OPEN_FAILED = 10996
+ER_DD_UPGRADE_FAILED_TO_FETCH_TABLESPACES = 10997
+ER_DD_UPGRADE_FAILED_TO_ACQUIRE_TABLESPACE = 10998
+ER_DD_UPGRADE_FAILED_TO_RESOLVE_TABLESPACE_ENGINE = 10999
+ER_FAILED_TO_CREATE_SDI_FOR_TABLESPACE = 11000
+ER_FAILED_TO_STORE_SDI_FOR_TABLESPACE = 11001
+ER_DD_UPGRADE_FAILED_TO_FETCH_TABLES = 11002
+ER_DD_UPGRADE_DD_POPULATED = 11003
+ER_DD_UPGRADE_INFO_FILE_OPEN_FAILED = 11004
+ER_DD_UPGRADE_INFO_FILE_CLOSE_FAILED = 11005
+ER_DD_UPGRADE_TABLESPACE_MIGRATION_FAILED = 11006
+ER_DD_UPGRADE_FAILED_TO_CREATE_TABLE_STATS = 11007
+ER_DD_UPGRADE_TABLE_STATS_MIGRATE_COMPLETED = 11008
+ER_DD_UPGRADE_FAILED_TO_CREATE_INDEX_STATS = 11009
+ER_DD_UPGRADE_INDEX_STATS_MIGRATE_COMPLETED = 11010
+ER_DD_UPGRADE_FAILED_FIND_VALID_DATA_DIR = 11011
+ER_DD_UPGRADE_START = 11012
+ER_DD_UPGRADE_FAILED_INIT_DD_SE = 11013
+ER_DD_UPGRADE_FOUND_PARTIALLY_UPGRADED_DD_ABORT = 11014
+ER_DD_UPGRADE_FOUND_PARTIALLY_UPGRADED_DD_CONTINUE = 11015
+ER_DD_UPGRADE_SE_LOGS_FAILED = 11016
+ER_DD_UPGRADE_SDI_INFO_UPDATE_FAILED = 11017
+ER_SKIP_UPDATING_METADATA_IN_SE_RO_MODE = 11018
+ER_CREATED_SYSTEM_WITH_VERSION = 11019
+ER_UNKNOWN_ERROR_DETECTED_IN_SE = 11020
+ER_READ_LOG_EVENT_FAILED = 11021
+ER_ROW_DATA_TOO_BIG_TO_WRITE_IN_BINLOG = 11022
+ER_FAILED_TO_CONSTRUCT_DROP_EVENT_QUERY = 11023
+ER_FAILED_TO_BINLOG_DROP_EVENT = 11024
+ER_FAILED_TO_START_SLAVE_THREAD = 11025
+ER_RPL_IO_THREAD_KILLED = 11026
+ER_SLAVE_RECONNECT_FAILED = 11027
+ER_SLAVE_KILLED_AFTER_RECONNECT = 11028
+ER_SLAVE_NOT_STARTED_ON_SOME_CHANNELS = 11029
+ER_FAILED_TO_ADD_RPL_FILTER = 11030
+ER_PER_CHANNEL_RPL_FILTER_CONF_FOR_GRP_RPL = 11031
+ER_RPL_FILTERS_NOT_ATTACHED_TO_CHANNEL = 11032
+ER_FAILED_TO_BUILD_DO_AND_IGNORE_TABLE_HASHES = 11033
+ER_CLONE_PLUGIN_NOT_LOADED = 11034
+ER_CLONE_HANDLER_EXISTS = 11035
+ER_FAILED_TO_CREATE_CLONE_HANDLER = 11036
+ER_CYCLE_TIMER_IS_NOT_AVAILABLE = 11037
+ER_NANOSECOND_TIMER_IS_NOT_AVAILABLE = 11038
+ER_MICROSECOND_TIMER_IS_NOT_AVAILABLE = 11039
+ER_PFS_MALLOC_ARRAY_OVERFLOW = 11040
+ER_PFS_MALLOC_ARRAY_OOM = 11041
+ER_INNODB_FAILED_TO_FIND_IDX_WITH_KEY_NO = 11042
+ER_INNODB_FAILED_TO_FIND_IDX = 11043
+ER_INNODB_FAILED_TO_FIND_IDX_FROM_DICT_CACHE = 11044
+ER_INNODB_ACTIVE_INDEX_CHANGE_FAILED = 11045
+ER_INNODB_DIFF_IN_REF_LEN = 11046
+ER_WRONG_TYPE_FOR_COLUMN_PREFIX_IDX_FLD = 11047
+ER_INNODB_CANNOT_CREATE_TABLE = 11048
+ER_INNODB_INTERNAL_INDEX = 11049
+ER_INNODB_IDX_CNT_MORE_THAN_DEFINED_IN_MYSQL = 11050
+ER_INNODB_IDX_CNT_FEWER_THAN_DEFINED_IN_MYSQL = 11051
+ER_INNODB_IDX_COLUMN_CNT_DIFF = 11052
+ER_INNODB_USE_MONITOR_GROUP_NAME = 11053
+ER_INNODB_MONITOR_DEFAULT_VALUE_NOT_DEFINED = 11054
+ER_INNODB_MONITOR_IS_ENABLED = 11055
+ER_INNODB_INVALID_MONITOR_COUNTER_NAME = 11056
+ER_WIN_LOAD_LIBRARY_FAILED = 11057
+ER_PARTITION_HANDLER_ADMIN_MSG = 11058
+ER_RPL_RLI_INIT_INFO_MSG = 11059
+ER_DD_UPGRADE_TABLE_INTACT_ERROR = 11060
+ER_SERVER_INIT_COMPILED_IN_COMMANDS = 11061
+ER_MYISAM_CHECK_METHOD_ERROR = 11062
+ER_MYISAM_CRASHED_ERROR = 11063
+ER_WAITPID_FAILED = 11064
+ER_FAILED_TO_FIND_MYSQLD_STATUS = 11065
+ER_INNODB_ERROR_LOGGER_MSG = 11066
+ER_INNODB_ERROR_LOGGER_FATAL_MSG = 11067
+ER_DEPRECATED_SYNTAX_WITH_REPLACEMENT = 11068
+ER_DEPRECATED_SYNTAX_NO_REPLACEMENT = 11069
+ER_DEPRECATE_MSG_NO_REPLACEMENT = 11070
+ER_LOG_PRINTF_MSG = 11071
+ER_BINLOG_LOGGING_NOT_POSSIBLE = 11072
+ER_FAILED_TO_SET_PERSISTED_OPTIONS = 11073
+ER_COMPONENTS_FAILED_TO_ACQUIRE_SERVICE_IMPLEMENTATION = 11074
+ER_RES_GRP_INVALID_VCPU_RANGE = 11075
+ER_RES_GRP_INVALID_VCPU_ID = 11076
+ER_ERROR_DURING_FLUSH_LOG_COMMIT_PHASE = 11077
+ER_DROP_DATABASE_FAILED_RMDIR_MANUALLY = 11078
+ER_EXPIRE_LOGS_DAYS_IGNORED = 11079
+ER_BINLOG_MALFORMED_OR_OLD_RELAY_LOG = 11080
+ER_DD_UPGRADE_VIEW_COLUMN_NAME_TOO_LONG = 11081
+ER_TABLE_NEEDS_DUMP_UPGRADE = 11082
+ER_DD_UPGRADE_FAILED_TO_UPDATE_VER_NO_IN_TABLESPACE = 11083
+ER_KEYRING_MIGRATION_FAILED = 11084
+ER_KEYRING_MIGRATION_SUCCESSFUL = 11085
+ER_RESTART_RECEIVED_INFO = 11086
+ER_LCTN_CHANGED = 11087
+ER_DD_INITIALIZE = 11088
+ER_DD_RESTART = 11089
+ER_DD_UPGRADE = 11090
+ER_DD_UPGRADE_OFF = 11091
+ER_DD_UPGRADE_VERSION_NOT_SUPPORTED = 11092
+ER_DD_UPGRADE_SCHEMA_UNAVAILABLE = 11093
+ER_DD_MINOR_DOWNGRADE = 11094
+ER_DD_MINOR_DOWNGRADE_VERSION_NOT_SUPPORTED = 11095
+ER_DD_NO_VERSION_FOUND = 11096
+ER_THREAD_POOL_NOT_SUPPORTED_ON_PLATFORM = 11097
+ER_THREAD_POOL_SIZE_TOO_LOW = 11098
+ER_THREAD_POOL_SIZE_TOO_HIGH = 11099
+ER_THREAD_POOL_ALGORITHM_INVALID = 11100
+ER_THREAD_POOL_INVALID_STALL_LIMIT = 11101
+ER_THREAD_POOL_INVALID_PRIO_KICKUP_TIMER = 11102
+ER_THREAD_POOL_MAX_UNUSED_THREADS_INVALID = 11103
+ER_THREAD_POOL_CON_HANDLER_INIT_FAILED = 11104
+ER_THREAD_POOL_INIT_FAILED = 11105
+ER_THREAD_POOL_PLUGIN_STARTED = 11106
+ER_THREAD_POOL_CANNOT_SET_THREAD_SPECIFIC_DATA = 11107
+ER_THREAD_POOL_FAILED_TO_CREATE_CONNECT_HANDLER_THD = 11108
+ER_THREAD_POOL_FAILED_TO_CREATE_THD_AND_AUTH_CONN = 11109
+ER_THREAD_POOL_FAILED_PROCESS_CONNECT_EVENT = 11110
+ER_THREAD_POOL_FAILED_TO_CREATE_POOL = 11111
+ER_THREAD_POOL_RATE_LIMITED_ERROR_MSGS = 11112
+ER_TRHEAD_POOL_LOW_LEVEL_INIT_FAILED = 11113
+ER_THREAD_POOL_LOW_LEVEL_REARM_FAILED = 11114
+ER_THREAD_POOL_BUFFER_TOO_SMALL = 11115
+ER_MECAB_NOT_SUPPORTED = 11116
+ER_MECAB_NOT_VERIFIED = 11117
+ER_MECAB_CREATING_MODEL = 11118
+ER_MECAB_FAILED_TO_CREATE_MODEL = 11119
+ER_MECAB_FAILED_TO_CREATE_TRIGGER = 11120
+ER_MECAB_UNSUPPORTED_CHARSET = 11121
+ER_MECAB_CHARSET_LOADED = 11122
+ER_MECAB_PARSE_FAILED = 11123
+ER_MECAB_OOM_WHILE_PARSING_TEXT = 11124
+ER_MECAB_CREATE_LATTICE_FAILED = 11125
+ER_SEMISYNC_TRACE_ENTER_FUNC = 11126
+ER_SEMISYNC_TRACE_EXIT_WITH_INT_EXIT_CODE = 11127
+ER_SEMISYNC_TRACE_EXIT_WITH_BOOL_EXIT_CODE = 11128
+ER_SEMISYNC_TRACE_EXIT = 11129
+ER_SEMISYNC_RPL_INIT_FOR_TRX = 11130
+ER_SEMISYNC_FAILED_TO_ALLOCATE_TRX_NODE = 11131
+ER_SEMISYNC_BINLOG_WRITE_OUT_OF_ORDER = 11132
+ER_SEMISYNC_INSERT_LOG_INFO_IN_ENTRY = 11133
+ER_SEMISYNC_PROBE_LOG_INFO_IN_ENTRY = 11134
+ER_SEMISYNC_CLEARED_ALL_ACTIVE_TRANSACTION_NODES = 11135
+ER_SEMISYNC_CLEARED_ACTIVE_TRANSACTION_TILL_POS = 11136
+ER_SEMISYNC_REPLY_MAGIC_NO_ERROR = 11137
+ER_SEMISYNC_REPLY_PKT_LENGTH_TOO_SMALL = 11138
+ER_SEMISYNC_REPLY_BINLOG_FILE_TOO_LARGE = 11139
+ER_SEMISYNC_SERVER_REPLY = 11140
+ER_SEMISYNC_FUNCTION_CALLED_TWICE = 11141
+ER_SEMISYNC_RPL_ENABLED_ON_MASTER = 11142
+ER_SEMISYNC_MASTER_OOM = 11143
+ER_SEMISYNC_DISABLED_ON_MASTER = 11144
+ER_SEMISYNC_FORCED_SHUTDOWN = 11145
+ER_SEMISYNC_MASTER_GOT_REPLY_AT_POS = 11146
+ER_SEMISYNC_MASTER_SIGNAL_ALL_WAITING_THREADS = 11147
+ER_SEMISYNC_MASTER_TRX_WAIT_POS = 11148
+ER_SEMISYNC_BINLOG_REPLY_IS_AHEAD = 11149
+ER_SEMISYNC_MOVE_BACK_WAIT_POS = 11150
+ER_SEMISYNC_INIT_WAIT_POS = 11151
+ER_SEMISYNC_WAIT_TIME_FOR_BINLOG_SENT = 11152
+ER_SEMISYNC_WAIT_FOR_BINLOG_TIMEDOUT = 11153
+ER_SEMISYNC_WAIT_TIME_ASSESSMENT_FOR_COMMIT_TRX_FAILED = 11154
+ER_SEMISYNC_RPL_SWITCHED_OFF = 11155
+ER_SEMISYNC_RPL_SWITCHED_ON = 11156
+ER_SEMISYNC_NO_SPACE_IN_THE_PKT = 11157
+ER_SEMISYNC_SYNC_HEADER_UPDATE_INFO = 11158
+ER_SEMISYNC_FAILED_TO_INSERT_TRX_NODE = 11159
+ER_SEMISYNC_TRX_SKIPPED_AT_POS = 11160
+ER_SEMISYNC_MASTER_FAILED_ON_NET_FLUSH = 11161
+ER_SEMISYNC_RECEIVED_ACK_IS_SMALLER = 11162
+ER_SEMISYNC_ADD_ACK_TO_SLOT = 11163
+ER_SEMISYNC_UPDATE_EXISTING_SLAVE_ACK = 11164
+ER_SEMISYNC_FAILED_TO_START_ACK_RECEIVER_THD = 11165
+ER_SEMISYNC_STARTING_ACK_RECEIVER_THD = 11166
+ER_SEMISYNC_FAILED_TO_WAIT_ON_DUMP_SOCKET = 11167
+ER_SEMISYNC_STOPPING_ACK_RECEIVER_THREAD = 11168
+ER_SEMISYNC_FAILED_REGISTER_SLAVE_TO_RECEIVER = 11169
+ER_SEMISYNC_START_BINLOG_DUMP_TO_SLAVE = 11170
+ER_SEMISYNC_STOP_BINLOG_DUMP_TO_SLAVE = 11171
+ER_SEMISYNC_UNREGISTER_TRX_OBSERVER_FAILED = 11172
+ER_SEMISYNC_UNREGISTER_BINLOG_STORAGE_OBSERVER_FAILED = 11173
+ER_SEMISYNC_UNREGISTER_BINLOG_TRANSMIT_OBSERVER_FAILED = 11174
+ER_SEMISYNC_UNREGISTERED_REPLICATOR = 11175
+ER_SEMISYNC_SOCKET_FD_TOO_LARGE = 11176
+ER_SEMISYNC_SLAVE_REPLY = 11177
+ER_SEMISYNC_MISSING_MAGIC_NO_FOR_SEMISYNC_PKT = 11178
+ER_SEMISYNC_SLAVE_START = 11179
+ER_SEMISYNC_SLAVE_REPLY_WITH_BINLOG_INFO = 11180
+ER_SEMISYNC_SLAVE_NET_FLUSH_REPLY_FAILED = 11181
+ER_SEMISYNC_SLAVE_SEND_REPLY_FAILED = 11182
+ER_SEMISYNC_EXECUTION_FAILED_ON_MASTER = 11183
+ER_SEMISYNC_NOT_SUPPORTED_BY_MASTER = 11184
+ER_SEMISYNC_SLAVE_SET_FAILED = 11185
+ER_SEMISYNC_FAILED_TO_STOP_ACK_RECEIVER_THD = 11186
+ER_FIREWALL_FAILED_TO_READ_FIREWALL_TABLES = 11187
+ER_FIREWALL_FAILED_TO_REG_DYNAMIC_PRIVILEGES = 11188
+ER_FIREWALL_RECORDING_STMT_WAS_TRUNCATED = 11189
+ER_FIREWALL_RECORDING_STMT_WITHOUT_TEXT = 11190
+ER_FIREWALL_SUSPICIOUS_STMT = 11191
+ER_FIREWALL_ACCESS_DENIED = 11192
+ER_FIREWALL_SKIPPED_UNKNOWN_USER_MODE = 11193
+ER_FIREWALL_RELOADING_CACHE = 11194
+ER_FIREWALL_RESET_FOR_USER = 11195
+ER_FIREWALL_STATUS_FLUSHED = 11196
+ER_KEYRING_LOGGER_ERROR_MSG = 11197
+ER_AUDIT_LOG_FILTER_IS_NOT_INSTALLED = 11198
+ER_AUDIT_LOG_SWITCHING_TO_INCLUDE_LIST = 11199
+ER_AUDIT_LOG_CANNOT_SET_LOG_POLICY_WITH_OTHER_POLICIES = 11200
+ER_AUDIT_LOG_ONLY_INCLUDE_LIST_USED = 11201
+ER_AUDIT_LOG_INDEX_MAP_CANNOT_ACCESS_DIR = 11202
+ER_AUDIT_LOG_WRITER_RENAME_FILE_FAILED = 11203
+ER_AUDIT_LOG_WRITER_DEST_FILE_ALREADY_EXISTS = 11204
+ER_AUDIT_LOG_WRITER_RENAME_FILE_FAILED_REMOVE_FILE_MANUALLY = 11205
+ER_AUDIT_LOG_WRITER_INCOMPLETE_FILE_RENAMED = 11206
+ER_AUDIT_LOG_WRITER_FAILED_TO_WRITE_TO_FILE = 11207
+ER_AUDIT_LOG_EC_WRITER_FAILED_TO_INIT_ENCRYPTION = 11208
+ER_AUDIT_LOG_EC_WRITER_FAILED_TO_INIT_COMPRESSION = 11209
+ER_AUDIT_LOG_EC_WRITER_FAILED_TO_CREATE_FILE = 11210
+ER_AUDIT_LOG_RENAME_LOG_FILE_BEFORE_FLUSH = 11211
+ER_AUDIT_LOG_FILTER_RESULT_MSG = 11212
+ER_AUDIT_LOG_JSON_READER_FAILED_TO_PARSE = 11213
+ER_AUDIT_LOG_JSON_READER_BUF_TOO_SMALL = 11214
+ER_AUDIT_LOG_JSON_READER_FAILED_TO_OPEN_FILE = 11215
+ER_AUDIT_LOG_JSON_READER_FILE_PARSING_ERROR = 11216
+ER_AUDIT_LOG_FILTER_INVALID_COLUMN_COUNT = 11217
+ER_AUDIT_LOG_FILTER_INVALID_COLUMN_DEFINITION = 11218
+ER_AUDIT_LOG_FILTER_FAILED_TO_STORE_TABLE_FLDS = 11219
+ER_AUDIT_LOG_FILTER_FAILED_TO_UPDATE_TABLE = 11220
+ER_AUDIT_LOG_FILTER_FAILED_TO_INSERT_INTO_TABLE = 11221
+ER_AUDIT_LOG_FILTER_FAILED_TO_DELETE_FROM_TABLE = 11222
+ER_AUDIT_LOG_FILTER_FAILED_TO_INIT_TABLE_FOR_READ = 11223
+ER_AUDIT_LOG_FILTER_FAILED_TO_READ_TABLE = 11224
+ER_AUDIT_LOG_FILTER_FAILED_TO_CLOSE_TABLE_AFTER_READING = 11225
+ER_AUDIT_LOG_FILTER_USER_AND_HOST_CANNOT_BE_EMPTY = 11226
+ER_AUDIT_LOG_FILTER_FLD_FILTERNAME_CANNOT_BE_EMPTY = 11227
+ER_VALIDATE_PWD_DICT_FILE_NOT_SPECIFIED = 11228
+ER_VALIDATE_PWD_DICT_FILE_NOT_LOADED = 11229
+ER_VALIDATE_PWD_DICT_FILE_TOO_BIG = 11230
+ER_VALIDATE_PWD_FAILED_TO_READ_DICT_FILE = 11231
+ER_VALIDATE_PWD_FAILED_TO_GET_FLD_FROM_SECURITY_CTX = 11232
+ER_VALIDATE_PWD_FAILED_TO_GET_SECURITY_CTX = 11233
+ER_VALIDATE_PWD_LENGTH_CHANGED = 11234
+ER_REWRITER_QUERY_ERROR_MSG = 11235
+ER_REWRITER_QUERY_FAILED = 11236
+ER_XPLUGIN_STARTUP_FAILED = 11237
+ER_XPLUGIN_SERVER_EXITING = 11238
+ER_XPLUGIN_SERVER_EXITED = 11239
+ER_XPLUGIN_USING_SSL_CONF_FROM_SERVER = 11240
+ER_XPLUGIN_USING_SSL_CONF_FROM_MYSQLX = 11241
+ER_XPLUGIN_FAILED_TO_USE_SSL_CONF = 11242
+ER_XPLUGIN_USING_SSL_FOR_TLS_CONNECTION = 11243
+ER_XPLUGIN_REFERENCE_TO_SECURE_CONN_WITH_XPLUGIN = 11244
+ER_XPLUGIN_ERROR_MSG = 11245
+ER_SHA_PWD_FAILED_TO_PARSE_AUTH_STRING = 11246
+ER_SHA_PWD_FAILED_TO_GENERATE_MULTI_ROUND_HASH = 11247
+ER_SHA_PWD_AUTH_REQUIRES_RSA_OR_SSL = 11248
+ER_SHA_PWD_RSA_KEY_TOO_LONG = 11249
+ER_PLUGIN_COMMON_FAILED_TO_OPEN_FILTER_TABLES = 11250
+ER_PLUGIN_COMMON_FAILED_TO_OPEN_TABLE = 11251
+ER_AUTH_LDAP_ERROR_LOGGER_ERROR_MSG = 11252
+ER_CONN_CONTROL_ERROR_MSG = 11253
+ER_GRP_RPL_ERROR_MSG = 11254
+ER_SHA_PWD_SALT_FOR_USER_CORRUPT = 11255
+ER_SYS_VAR_COMPONENT_OOM = 11256
+ER_SYS_VAR_COMPONENT_VARIABLE_SET_READ_ONLY = 11257
+ER_SYS_VAR_COMPONENT_UNKNOWN_VARIABLE_TYPE = 11258
+ER_SYS_VAR_COMPONENT_FAILED_TO_PARSE_VARIABLE_OPTIONS = 11259
+ER_SYS_VAR_COMPONENT_FAILED_TO_MAKE_VARIABLE_PERSISTENT = 11260
+ER_COMPONENT_FILTER_CONFUSED = 11261
+ER_STOP_SLAVE_IO_THREAD_DISK_SPACE = 11262
+ER_LOG_FILE_CANNOT_OPEN = 11263
+OBSOLETE_ER_UNABLE_TO_COLLECT_INSTANCE_LOG_STATUS = 11264
+OBSOLETE_ER_DEPRECATED_UTF8_ALIAS = 11265
+OBSOLETE_ER_DEPRECATED_NATIONAL = 11266
+OBSOLETE_ER_SLAVE_POSSIBLY_DIVERGED_AFTER_DDL = 11267
+ER_PERSIST_OPTION_STATUS = 11268
+ER_NOT_IMPLEMENTED_GET_TABLESPACE_STATISTICS = 11269
+OBSOLETE_ER_UNABLE_TO_SET_OPTION = 11270
+OBSOLETE_ER_RESERVED_TABLESPACE_NAME = 11271
+ER_SSL_FIPS_MODE_ERROR = 11272
+ER_CONN_INIT_CONNECT_IGNORED = 11273
+ER_UNSUPPORTED_SQL_MODE = 11274
+ER_REWRITER_OOM = 11275
+ER_REWRITER_TABLE_MALFORMED_ERROR = 11276
+ER_REWRITER_LOAD_FAILED = 11277
+ER_REWRITER_READ_FAILED = 11278
+ER_CONN_CONTROL_EVENT_COORDINATOR_INIT_FAILED = 11279
+ER_CONN_CONTROL_STAT_CONN_DELAY_TRIGGERED_UPDATE_FAILED = 11280
+ER_CONN_CONTROL_STAT_CONN_DELAY_TRIGGERED_RESET_FAILED = 11281
+ER_CONN_CONTROL_INVALID_CONN_DELAY_TYPE = 11282
+ER_CONN_CONTROL_DELAY_ACTION_INIT_FAILED = 11283
+ER_CONN_CONTROL_FAILED_TO_SET_CONN_DELAY = 11284
+ER_CONN_CONTROL_FAILED_TO_UPDATE_CONN_DELAY_HASH = 11285
+ER_XPLUGIN_FORCE_STOP_CLIENT = 11286
+ER_XPLUGIN_MAX_AUTH_ATTEMPTS_REACHED = 11287
+ER_XPLUGIN_BUFFER_PAGE_ALLOC_FAILED = 11288
+ER_XPLUGIN_DETECTED_HANGING_CLIENTS = 11289
+ER_XPLUGIN_FAILED_TO_ACCEPT_CLIENT = 11290
+ER_XPLUGIN_FAILED_TO_SCHEDULE_CLIENT = 11291
+ER_XPLUGIN_FAILED_TO_PREPARE_IO_INTERFACES = 11292
+ER_XPLUGIN_SRV_SESSION_INIT_THREAD_FAILED = 11293
+ER_XPLUGIN_UNABLE_TO_USE_USER_SESSION_ACCOUNT = 11294
+ER_XPLUGIN_REFERENCE_TO_USER_ACCOUNT_DOC_SECTION = 11295
+ER_XPLUGIN_UNEXPECTED_EXCEPTION_DISPATCHING_CMD = 11296
+ER_XPLUGIN_EXCEPTION_IN_TASK_SCHEDULER = 11297
+ER_XPLUGIN_TASK_SCHEDULING_FAILED = 11298
+ER_XPLUGIN_EXCEPTION_IN_EVENT_LOOP = 11299
+ER_XPLUGIN_LISTENER_SETUP_FAILED = 11300
+ER_XPLUING_NET_STARTUP_FAILED = 11301
+ER_XPLUGIN_FAILED_AT_SSL_CONF = 11302
+ER_XPLUGIN_CLIENT_SSL_HANDSHAKE_FAILED = 11303
+ER_XPLUGIN_SSL_HANDSHAKE_WITH_SERVER_FAILED = 11304
+ER_XPLUGIN_FAILED_TO_CREATE_SESSION_FOR_CONN = 11305
+ER_XPLUGIN_FAILED_TO_INITIALIZE_SESSION = 11306
+ER_XPLUGIN_MESSAGE_TOO_LONG = 11307
+ER_XPLUGIN_UNINITIALIZED_MESSAGE = 11308
+ER_XPLUGIN_FAILED_TO_SET_MIN_NUMBER_OF_WORKERS = 11309
+ER_XPLUGIN_UNABLE_TO_ACCEPT_CONNECTION = 11310
+ER_XPLUGIN_ALL_IO_INTERFACES_DISABLED = 11311
+ER_XPLUGIN_INVALID_MSG_DURING_CLIENT_INIT = 11312
+ER_XPLUGIN_CLOSING_CLIENTS_ON_SHUTDOWN = 11313
+ER_XPLUGIN_ERROR_READING_SOCKET = 11314
+ER_XPLUGIN_PEER_DISCONNECTED_WHILE_READING_MSG_BODY = 11315
+ER_XPLUGIN_READ_FAILED_CLOSING_CONNECTION = 11316
+ER_XPLUGIN_INVALID_AUTH_METHOD = 11317
+ER_XPLUGIN_UNEXPECTED_MSG_DURING_AUTHENTICATION = 11318
+ER_XPLUGIN_ERROR_WRITING_TO_CLIENT = 11319
+ER_XPLUGIN_SCHEDULER_STARTED = 11320
+ER_XPLUGIN_SCHEDULER_STOPPED = 11321
+ER_XPLUGIN_LISTENER_SYS_VARIABLE_ERROR = 11322
+ER_XPLUGIN_LISTENER_STATUS_MSG = 11323
+ER_XPLUGIN_RETRYING_BIND_ON_PORT = 11324
+ER_XPLUGIN_SHUTDOWN_TRIGGERED = 11325
+ER_XPLUGIN_USER_ACCOUNT_WITH_ALL_PERMISSIONS = 11326
+ER_XPLUGIN_EXISTING_USER_ACCOUNT_WITH_INCOMPLETE_GRANTS = 11327
+ER_XPLUGIN_SERVER_STARTS_HANDLING_CONNECTIONS = 11328
+ER_XPLUGIN_SERVER_STOPPED_HANDLING_CONNECTIONS = 11329
+ER_XPLUGIN_FAILED_TO_INTERRUPT_SESSION = 11330
+ER_XPLUGIN_CLIENT_RELEASE_TRIGGERED = 11331
+ER_XPLUGIN_IPv6_AVAILABLE = 11332
+ER_XPLUGIN_UNIX_SOCKET_NOT_CONFIGURED = 11333
+ER_XPLUGIN_CLIENT_KILL_MSG = 11334
+ER_XPLUGIN_FAILED_TO_GET_SECURITY_CTX = 11335
+ER_XPLUGIN_FAILED_TO_SWITCH_SECURITY_CTX_TO_ROOT = 11336
+ER_XPLUGIN_FAILED_TO_CLOSE_SQL_SESSION = 11337
+ER_XPLUGIN_FAILED_TO_EXECUTE_ADMIN_CMD = 11338
+ER_XPLUGIN_EMPTY_ADMIN_CMD = 11339
+ER_XPLUGIN_FAILED_TO_GET_SYS_VAR = 11340
+ER_XPLUGIN_FAILED_TO_GET_CREATION_STMT = 11341
+ER_XPLUGIN_FAILED_TO_GET_ENGINE_INFO = 11342
+ER_XPLUGIN_FAIL_TO_GET_RESULT_DATA = 11343
+ER_XPLUGIN_CAPABILITY_EXPIRED_PASSWORD = 11344
+ER_XPLUGIN_FAILED_TO_SET_SO_REUSEADDR_FLAG = 11345
+ER_XPLUGIN_FAILED_TO_OPEN_INTERNAL_SESSION = 11346
+ER_XPLUGIN_FAILED_TO_SWITCH_CONTEXT = 11347
+ER_XPLUGIN_FAILED_TO_UNREGISTER_UDF = 11348
+ER_XPLUGIN_GET_PEER_ADDRESS_FAILED = 11349
+ER_XPLUGIN_CAPABILITY_CLIENT_INTERACTIVE_FAILED = 11350
+ER_XPLUGIN_FAILED_TO_RESET_IPV6_V6ONLY_FLAG = 11351
+ER_KEYRING_INVALID_KEY_TYPE = 11352
+ER_KEYRING_INVALID_KEY_LENGTH = 11353
+ER_KEYRING_FAILED_TO_CREATE_KEYRING_DIR = 11354
+ER_KEYRING_FILE_INIT_FAILED = 11355
+ER_KEYRING_INTERNAL_EXCEPTION_FAILED_FILE_INIT = 11356
+ER_KEYRING_FAILED_TO_GENERATE_KEY = 11357
+ER_KEYRING_CHECK_KEY_FAILED_DUE_TO_INVALID_KEY = 11358
+ER_KEYRING_CHECK_KEY_FAILED_DUE_TO_EMPTY_KEY_ID = 11359
+ER_KEYRING_OPERATION_FAILED_DUE_TO_INTERNAL_ERROR = 11360
+ER_KEYRING_INCORRECT_FILE = 11361
+ER_KEYRING_FOUND_MALFORMED_BACKUP_FILE = 11362
+ER_KEYRING_FAILED_TO_RESTORE_FROM_BACKUP_FILE = 11363
+ER_KEYRING_FAILED_TO_FLUSH_KEYRING_TO_FILE = 11364
+ER_KEYRING_FAILED_TO_GET_FILE_STAT = 11365
+ER_KEYRING_FAILED_TO_REMOVE_FILE = 11366
+ER_KEYRING_FAILED_TO_TRUNCATE_FILE = 11367
+ER_KEYRING_UNKNOWN_ERROR = 11368
+ER_KEYRING_FAILED_TO_SET_KEYRING_FILE_DATA = 11369
+ER_KEYRING_FILE_IO_ERROR = 11370
+ER_KEYRING_FAILED_TO_LOAD_KEYRING_CONTENT = 11371
+ER_KEYRING_FAILED_TO_FLUSH_KEYS_TO_KEYRING = 11372
+ER_KEYRING_FAILED_TO_FLUSH_KEYS_TO_KEYRING_BACKUP = 11373
+ER_KEYRING_KEY_FETCH_FAILED_DUE_TO_EMPTY_KEY_ID = 11374
+ER_KEYRING_FAILED_TO_REMOVE_KEY_DUE_TO_EMPTY_ID = 11375
+ER_KEYRING_OKV_INCORRECT_KEY_VAULT_CONFIGURED = 11376
+ER_KEYRING_OKV_INIT_FAILED_DUE_TO_INCORRECT_CONF = 11377
+ER_KEYRING_OKV_INIT_FAILED_DUE_TO_INTERNAL_ERROR = 11378
+ER_KEYRING_OKV_INVALID_KEY_TYPE = 11379
+ER_KEYRING_OKV_INVALID_KEY_LENGTH_FOR_CIPHER = 11380
+ER_KEYRING_OKV_FAILED_TO_GENERATE_KEY_DUE_TO_INTERNAL_ERROR = 11381
+ER_KEYRING_OKV_FAILED_TO_FIND_SERVER_ENTRY = 11382
+ER_KEYRING_OKV_FAILED_TO_FIND_STANDBY_SERVER_ENTRY = 11383
+ER_KEYRING_OKV_FAILED_TO_PARSE_CONF_FILE = 11384
+ER_KEYRING_OKV_FAILED_TO_LOAD_KEY_UID = 11385
+ER_KEYRING_OKV_FAILED_TO_INIT_SSL_LAYER = 11386
+ER_KEYRING_OKV_FAILED_TO_INIT_CLIENT = 11387
+ER_KEYRING_OKV_CONNECTION_TO_SERVER_FAILED = 11388
+ER_KEYRING_OKV_FAILED_TO_REMOVE_KEY = 11389
+ER_KEYRING_OKV_FAILED_TO_ADD_ATTRIBUTE = 11390
+ER_KEYRING_OKV_FAILED_TO_GENERATE_KEY = 11391
+ER_KEYRING_OKV_FAILED_TO_STORE_KEY = 11392
+ER_KEYRING_OKV_FAILED_TO_ACTIVATE_KEYS = 11393
+ER_KEYRING_OKV_FAILED_TO_FETCH_KEY = 11394
+ER_KEYRING_OKV_FAILED_TO_STORE_OR_GENERATE_KEY = 11395
+ER_KEYRING_OKV_FAILED_TO_RETRIEVE_KEY_SIGNATURE = 11396
+ER_KEYRING_OKV_FAILED_TO_RETRIEVE_KEY = 11397
+ER_KEYRING_OKV_FAILED_TO_LOAD_SSL_TRUST_STORE = 11398
+ER_KEYRING_OKV_FAILED_TO_SET_CERTIFICATE_FILE = 11399
+ER_KEYRING_OKV_FAILED_TO_SET_KEY_FILE = 11400
+ER_KEYRING_OKV_KEY_MISMATCH = 11401
+ER_KEYRING_ENCRYPTED_FILE_INCORRECT_KEYRING_FILE = 11402
+ER_KEYRING_ENCRYPTED_FILE_DECRYPTION_FAILED = 11403
+ER_KEYRING_ENCRYPTED_FILE_FOUND_MALFORMED_BACKUP_FILE = 11404
+ER_KEYRING_ENCRYPTED_FILE_FAILED_TO_RESTORE_KEYRING = 11405
+ER_KEYRING_ENCRYPTED_FILE_FAILED_TO_FLUSH_KEYRING = 11406
+ER_KEYRING_ENCRYPTED_FILE_ENCRYPTION_FAILED = 11407
+ER_KEYRING_ENCRYPTED_FILE_INVALID_KEYRING_DIR = 11408
+ER_KEYRING_ENCRYPTED_FILE_FAILED_TO_CREATE_KEYRING_DIR = 11409
+ER_KEYRING_ENCRYPTED_FILE_PASSWORD_IS_INVALID = 11410
+ER_KEYRING_ENCRYPTED_FILE_PASSWORD_IS_TOO_LONG = 11411
+ER_KEYRING_ENCRYPTED_FILE_INIT_FAILURE = 11412
+ER_KEYRING_ENCRYPTED_FILE_INIT_FAILED_DUE_TO_INTERNAL_ERROR = 11413
+ER_KEYRING_ENCRYPTED_FILE_GEN_KEY_FAILED_DUE_TO_INTERNAL_ERROR = 11414
+ER_KEYRING_AWS_FAILED_TO_SET_CMK_ID = 11415
+ER_KEYRING_AWS_FAILED_TO_SET_REGION = 11416
+ER_KEYRING_AWS_FAILED_TO_OPEN_CONF_FILE = 11417
+ER_KEYRING_AWS_FAILED_TO_ACCESS_KEY_ID_FROM_CONF_FILE = 11418
+ER_KEYRING_AWS_FAILED_TO_ACCESS_KEY_FROM_CONF_FILE = 11419
+ER_KEYRING_AWS_INVALID_CONF_FILE_PATH = 11420
+ER_KEYRING_AWS_INVALID_DATA_FILE_PATH = 11421
+ER_KEYRING_AWS_FAILED_TO_ACCESS_OR_CREATE_KEYRING_DIR = 11422
+ER_KEYRING_AWS_FAILED_TO_ACCESS_OR_CREATE_KEYRING_DATA_FILE = 11423
+ER_KEYRING_AWS_FAILED_TO_INIT_DUE_TO_INTERNAL_ERROR = 11424
+ER_KEYRING_AWS_FAILED_TO_ACCESS_DATA_FILE = 11425
+ER_KEYRING_AWS_CMK_ID_NOT_SET = 11426
+ER_KEYRING_AWS_FAILED_TO_GET_KMS_CREDENTIAL_FROM_CONF_FILE = 11427
+ER_KEYRING_AWS_INIT_FAILURE = 11428
+ER_KEYRING_AWS_FAILED_TO_INIT_DUE_TO_PLUGIN_INTERNAL_ERROR = 11429
+ER_KEYRING_AWS_INVALID_KEY_LENGTH_FOR_CIPHER = 11430
+ER_KEYRING_AWS_FAILED_TO_GENERATE_KEY_DUE_TO_INTERNAL_ERROR = 11431
+ER_KEYRING_AWS_INCORRECT_FILE = 11432
+ER_KEYRING_AWS_FOUND_MALFORMED_BACKUP_FILE = 11433
+ER_KEYRING_AWS_FAILED_TO_RESTORE_FROM_BACKUP_FILE = 11434
+ER_KEYRING_AWS_FAILED_TO_FLUSH_KEYRING_TO_FILE = 11435
+ER_KEYRING_AWS_INCORRECT_REGION = 11436
+ER_KEYRING_AWS_FAILED_TO_CONNECT_KMS = 11437
+ER_KEYRING_AWS_FAILED_TO_GENERATE_NEW_KEY = 11438
+ER_KEYRING_AWS_FAILED_TO_ENCRYPT_KEY = 11439
+ER_KEYRING_AWS_FAILED_TO_RE_ENCRYPT_KEY = 11440
+ER_KEYRING_AWS_FAILED_TO_DECRYPT_KEY = 11441
+ER_KEYRING_AWS_FAILED_TO_ROTATE_CMK = 11442
+ER_GRP_RPL_GTID_ALREADY_USED = 11443
+ER_GRP_RPL_APPLIER_THD_KILLED = 11444
+ER_GRP_RPL_EVENT_HANDLING_ERROR = 11445
+ER_GRP_RPL_ERROR_GTID_EXECUTION_INFO = 11446
+ER_GRP_RPL_CERTIFICATE_SIZE_ERROR = 11447
+ER_GRP_RPL_CREATE_APPLIER_CACHE_ERROR = 11448
+ER_GRP_RPL_UNBLOCK_WAITING_THD = 11449
+ER_GRP_RPL_APPLIER_PIPELINE_NOT_DISPOSED = 11450
+ER_GRP_RPL_APPLIER_THD_EXECUTION_ABORTED = 11451
+ER_GRP_RPL_APPLIER_EXECUTION_FATAL_ERROR = 11452
+ER_GRP_RPL_ERROR_STOPPING_CHANNELS = 11453
+ER_GRP_RPL_ERROR_SENDING_SINGLE_PRIMARY_MSSG = 11454
+ER_GRP_RPL_UPDATE_TRANS_SNAPSHOT_VER_ERROR = 11455
+ER_GRP_RPL_SIDNO_FETCH_ERROR = 11456
+ER_GRP_RPL_BROADCAST_COMMIT_TRANS_MSSG_FAILED = 11457
+ER_GRP_RPL_GROUP_NAME_PARSE_ERROR = 11458
+ER_GRP_RPL_ADD_GRPSID_TO_GRPGTIDSID_MAP_ERROR = 11459
+ER_GRP_RPL_UPDATE_GRPGTID_EXECUTED_ERROR = 11460
+ER_GRP_RPL_DONOR_TRANS_INFO_ERROR = 11461
+ER_GRP_RPL_SERVER_CONN_ERROR = 11462
+ER_GRP_RPL_ERROR_FETCHING_GTID_EXECUTED_SET = 11463
+ER_GRP_RPL_ADD_GTID_TO_GRPGTID_EXECUTED_ERROR = 11464
+ER_GRP_RPL_ERROR_FETCHING_GTID_SET = 11465
+ER_GRP_RPL_ADD_RETRIEVED_SET_TO_GRP_GTID_EXECUTED_ERROR = 11466
+ER_GRP_RPL_CERTIFICATION_INITIALIZATION_FAILURE = 11467
+ER_GRP_RPL_UPDATE_LAST_CONFLICT_FREE_TRANS_ERROR = 11468
+ER_GRP_RPL_UPDATE_TRANS_SNAPSHOT_REF_VER_ERROR = 11469
+ER_GRP_RPL_FETCH_TRANS_SIDNO_ERROR = 11470
+ER_GRP_RPL_ERROR_VERIFYING_SIDNO = 11471
+ER_GRP_RPL_CANT_GENERATE_GTID = 11472
+ER_GRP_RPL_INVALID_GTID_SET = 11473
+ER_GRP_RPL_UPDATE_GTID_SET_ERROR = 11474
+ER_GRP_RPL_RECEIVED_SET_MISSING_GTIDS = 11475
+ER_GRP_RPL_SKIP_COMPUTATION_TRANS_COMMITTED = 11476
+ER_GRP_RPL_NULL_PACKET = 11477
+ER_GRP_RPL_CANT_READ_GTID = 11478
+ER_GRP_RPL_PROCESS_GTID_SET_ERROR = 11479
+ER_GRP_RPL_PROCESS_INTERSECTION_GTID_SET_ERROR = 11480
+ER_GRP_RPL_SET_STABLE_TRANS_ERROR = 11481
+ER_GRP_RPL_CANT_READ_GRP_GTID_EXTRACTED = 11482
+ER_GRP_RPL_CANT_READ_WRITE_SET_ITEM = 11483
+ER_GRP_RPL_INIT_CERTIFICATION_INFO_FAILURE = 11484
+ER_GRP_RPL_CONFLICT_DETECTION_DISABLED = 11485
+ER_GRP_RPL_MSG_DISCARDED = 11486
+ER_GRP_RPL_MISSING_GRP_RPL_APPLIER = 11487
+ER_GRP_RPL_CERTIFIER_MSSG_PROCESS_ERROR = 11488
+ER_GRP_RPL_SRV_NOT_ONLINE = 11489
+ER_GRP_RPL_SRV_ONLINE = 11490
+ER_GRP_RPL_DISABLE_SRV_READ_MODE_RESTRICTED = 11491
+ER_GRP_RPL_MEM_ONLINE = 11492
+ER_GRP_RPL_MEM_UNREACHABLE = 11493
+ER_GRP_RPL_MEM_REACHABLE = 11494
+ER_GRP_RPL_SRV_BLOCKED = 11495
+ER_GRP_RPL_SRV_BLOCKED_FOR_SECS = 11496
+ER_GRP_RPL_CHANGE_GRP_MEM_NOT_PROCESSED = 11497
+ER_GRP_RPL_MEMBER_CONTACT_RESTORED = 11498
+ER_GRP_RPL_MEMBER_REMOVED = 11499
+ER_GRP_RPL_PRIMARY_MEMBER_LEFT_GRP = 11500
+ER_GRP_RPL_MEMBER_ADDED = 11501
+ER_GRP_RPL_MEMBER_EXIT_PLUGIN_ERROR = 11502
+ER_GRP_RPL_MEMBER_CHANGE = 11503
+ER_GRP_RPL_MEMBER_LEFT_GRP = 11504
+ER_GRP_RPL_MEMBER_EXPELLED = 11505
+ER_GRP_RPL_SESSION_OPEN_FAILED = 11506
+ER_GRP_RPL_NEW_PRIMARY_ELECTED = 11507
+ER_GRP_RPL_DISABLE_READ_ONLY_FAILED = 11508
+ER_GRP_RPL_ENABLE_READ_ONLY_FAILED = 11509
+ER_GRP_RPL_SRV_PRIMARY_MEM = 11510
+ER_GRP_RPL_SRV_SECONDARY_MEM = 11511
+ER_GRP_RPL_NO_SUITABLE_PRIMARY_MEM = 11512
+ER_GRP_RPL_SUPER_READ_ONLY_ACTIVATE_ERROR = 11513
+ER_GRP_RPL_EXCEEDS_AUTO_INC_VALUE = 11514
+ER_GRP_RPL_DATA_NOT_PROVIDED_BY_MEM = 11515
+ER_GRP_RPL_MEMBER_ALREADY_EXISTS = 11516
+ER_GRP_RPL_GRP_CHANGE_INFO_EXTRACT_ERROR = 11517
+ER_GRP_RPL_GTID_EXECUTED_EXTRACT_ERROR = 11518
+ER_GRP_RPL_GTID_SET_EXTRACT_ERROR = 11519
+ER_GRP_RPL_START_FAILED = 11520
+ER_GRP_RPL_MEMBER_VER_INCOMPATIBLE = 11521
+ER_GRP_RPL_TRANS_NOT_PRESENT_IN_GRP = 11522
+ER_GRP_RPL_TRANS_GREATER_THAN_GRP = 11523
+ER_GRP_RPL_MEMBER_VERSION_LOWER_THAN_GRP = 11524
+ER_GRP_RPL_LOCAL_GTID_SETS_PROCESS_ERROR = 11525
+ER_GRP_RPL_MEMBER_TRANS_GREATER_THAN_GRP = 11526
+ER_GRP_RPL_BLOCK_SIZE_DIFF_FROM_GRP = 11527
+ER_GRP_RPL_TRANS_WRITE_SET_EXTRACT_DIFF_FROM_GRP = 11528
+ER_GRP_RPL_MEMBER_CFG_INCOMPATIBLE_WITH_GRP_CFG = 11529
+ER_GRP_RPL_MEMBER_STOP_RPL_CHANNELS_ERROR = 11530
+ER_GRP_RPL_PURGE_APPLIER_LOGS = 11531
+ER_GRP_RPL_RESET_APPLIER_MODULE_LOGS_ERROR = 11532
+ER_GRP_RPL_APPLIER_THD_SETUP_ERROR = 11533
+ER_GRP_RPL_APPLIER_THD_START_ERROR = 11534
+ER_GRP_RPL_APPLIER_THD_STOP_ERROR = 11535
+ER_GRP_RPL_FETCH_TRANS_DATA_FAILED = 11536
+ER_GRP_RPL_SLAVE_IO_THD_PRIMARY_UNKNOWN = 11537
+ER_GRP_RPL_SALVE_IO_THD_ON_SECONDARY_MEMBER = 11538
+ER_GRP_RPL_SLAVE_SQL_THD_PRIMARY_UNKNOWN = 11539
+ER_GRP_RPL_SLAVE_SQL_THD_ON_SECONDARY_MEMBER = 11540
+ER_GRP_RPL_NEEDS_INNODB_TABLE = 11541
+ER_GRP_RPL_PRIMARY_KEY_NOT_DEFINED = 11542
+ER_GRP_RPL_FK_WITH_CASCADE_UNSUPPORTED = 11543
+ER_GRP_RPL_AUTO_INC_RESET = 11544
+ER_GRP_RPL_AUTO_INC_OFFSET_RESET = 11545
+ER_GRP_RPL_AUTO_INC_SET = 11546
+ER_GRP_RPL_AUTO_INC_OFFSET_SET = 11547
+ER_GRP_RPL_FETCH_TRANS_CONTEXT_FAILED = 11548
+ER_GRP_RPL_FETCH_FORMAT_DESC_LOG_EVENT_FAILED = 11549
+ER_GRP_RPL_FETCH_TRANS_CONTEXT_LOG_EVENT_FAILED = 11550
+ER_GRP_RPL_FETCH_SNAPSHOT_VERSION_FAILED = 11551
+ER_GRP_RPL_FETCH_GTID_LOG_EVENT_FAILED = 11552
+ER_GRP_RPL_UPDATE_SERV_CERTIFICATE_FAILED = 11553
+ER_GRP_RPL_ADD_GTID_INFO_WITH_LOCAL_GTID_FAILED = 11554
+ER_GRP_RPL_ADD_GTID_INFO_WITHOUT_LOCAL_GTID_FAILED = 11555
+ER_GRP_RPL_NOTIFY_CERTIFICATION_OUTCOME_FAILED = 11556
+ER_GRP_RPL_ADD_GTID_INFO_WITH_REMOTE_GTID_FAILED = 11557
+ER_GRP_RPL_ADD_GTID_INFO_WITHOUT_REMOTE_GTID_FAILED = 11558
+ER_GRP_RPL_FETCH_VIEW_CHANGE_LOG_EVENT_FAILED = 11559
+ER_GRP_RPL_CONTACT_WITH_SRV_FAILED = 11560
+ER_GRP_RPL_SRV_WAIT_TIME_OUT = 11561
+ER_GRP_RPL_FETCH_LOG_EVENT_FAILED = 11562
+ER_GRP_RPL_START_GRP_RPL_FAILED = 11563
+ER_GRP_RPL_CONN_INTERNAL_PLUGIN_FAIL = 11564
+ER_GRP_RPL_SUPER_READ_ON = 11565
+ER_GRP_RPL_SUPER_READ_OFF = 11566
+ER_GRP_RPL_KILLED_SESSION_ID = 11567
+ER_GRP_RPL_KILLED_FAILED_ID = 11568
+ER_GRP_RPL_INTERNAL_QUERY = 11569
+ER_GRP_RPL_COPY_FROM_EMPTY_STRING = 11570
+ER_GRP_RPL_QUERY_FAIL = 11571
+ER_GRP_RPL_CREATE_SESSION_UNABLE = 11572
+ER_GRP_RPL_MEMBER_NOT_FOUND = 11573
+ER_GRP_RPL_MAXIMUM_CONNECTION_RETRIES_REACHED = 11574
+ER_GRP_RPL_ALL_DONORS_LEFT_ABORT_RECOVERY = 11575
+ER_GRP_RPL_ESTABLISH_RECOVERY_WITH_DONOR = 11576
+ER_GRP_RPL_ESTABLISH_RECOVERY_WITH_ANOTHER_DONOR = 11577
+ER_GRP_RPL_NO_VALID_DONOR = 11578
+ER_GRP_RPL_CONFIG_RECOVERY = 11579
+ER_GRP_RPL_ESTABLISHING_CONN_GRP_REC_DONOR = 11580
+ER_GRP_RPL_CREATE_GRP_RPL_REC_CHANNEL = 11581
+ER_GRP_RPL_DONOR_SERVER_CONN = 11582
+ER_GRP_RPL_CHECK_STATUS_TABLE = 11583
+ER_GRP_RPL_STARTING_GRP_REC = 11584
+ER_GRP_RPL_DONOR_CONN_TERMINATION = 11585
+ER_GRP_RPL_STOPPING_GRP_REC = 11586
+ER_GRP_RPL_PURGE_REC = 11587
+ER_GRP_RPL_UNABLE_TO_KILL_CONN_REC_DONOR_APPLIER = 11588
+ER_GRP_RPL_UNABLE_TO_KILL_CONN_REC_DONOR_FAILOVER = 11589
+ER_GRP_RPL_FAILED_TO_NOTIFY_GRP_MEMBERSHIP_EVENT = 11590
+ER_GRP_RPL_FAILED_TO_BROADCAST_GRP_MEMBERSHIP_NOTIFICATION = 11591
+ER_GRP_RPL_FAILED_TO_BROADCAST_MEMBER_STATUS_NOTIFICATION = 11592
+ER_GRP_RPL_OOM_FAILED_TO_GENERATE_IDENTIFICATION_HASH = 11593
+ER_GRP_RPL_WRITE_IDENT_HASH_BASE64_ENCODING_FAILED = 11594
+ER_GRP_RPL_INVALID_BINLOG_FORMAT = 11595
+ER_GRP_RPL_BINLOG_CHECKSUM_SET = 11596
+ER_GRP_RPL_TRANS_WRITE_SET_EXTRACTION_NOT_SET = 11597
+ER_GRP_RPL_UNSUPPORTED_TRANS_ISOLATION = 11598
+ER_GRP_RPL_CANNOT_EXECUTE_TRANS_WHILE_STOPPING = 11599
+ER_GRP_RPL_CANNOT_EXECUTE_TRANS_WHILE_RECOVERING = 11600
+ER_GRP_RPL_CANNOT_EXECUTE_TRANS_IN_ERROR_STATE = 11601
+ER_GRP_RPL_CANNOT_EXECUTE_TRANS_IN_OFFLINE_MODE = 11602
+ER_GRP_RPL_MULTIPLE_CACHE_TYPE_NOT_SUPPORTED_FOR_SESSION = 11603
+ER_GRP_RPL_FAILED_TO_REINIT_BINLOG_CACHE_FOR_READ = 11604
+ER_GRP_RPL_FAILED_TO_CREATE_TRANS_CONTEXT = 11605
+ER_GRP_RPL_FAILED_TO_EXTRACT_TRANS_WRITE_SET = 11606
+ER_GRP_RPL_FAILED_TO_GATHER_TRANS_WRITE_SET = 11607
+ER_GRP_RPL_TRANS_SIZE_EXCEEDS_LIMIT = 11608
+ER_GRP_RPL_REINIT_OF_INTERNAL_CACHE_FOR_READ_FAILED = 11609
+ER_GRP_RPL_APPENDING_DATA_TO_INTERNAL_CACHE_FAILED = 11610
+ER_GRP_RPL_WRITE_TO_BINLOG_CACHE_FAILED = 11611
+ER_GRP_RPL_FAILED_TO_REGISTER_TRANS_OUTCOME_NOTIFICTION = 11612
+ER_GRP_RPL_MSG_TOO_LONG_BROADCASTING_TRANS_FAILED = 11613
+ER_GRP_RPL_BROADCASTING_TRANS_TO_GRP_FAILED = 11614
+ER_GRP_RPL_ERROR_WHILE_WAITING_FOR_CONFLICT_DETECTION = 11615
+ER_GRP_RPL_REINIT_OF_INTERNAL_CACHE_FOR_WRITE_FAILED = 11616
+ER_GRP_RPL_FAILED_TO_CREATE_COMMIT_CACHE = 11617
+ER_GRP_RPL_REINIT_OF_COMMIT_CACHE_FOR_WRITE_FAILED = 11618
+ER_GRP_RPL_PREV_REC_SESSION_RUNNING = 11619
+ER_GRP_RPL_FATAL_REC_PROCESS = 11620
+ER_GRP_RPL_WHILE_STOPPING_REP_CHANNEL = 11621
+ER_GRP_RPL_UNABLE_TO_EVALUATE_APPLIER_STATUS = 11622
+ER_GRP_RPL_ONLY_ONE_SERVER_ALIVE = 11623
+ER_GRP_RPL_CERTIFICATION_REC_PROCESS = 11624
+ER_GRP_RPL_UNABLE_TO_ENSURE_EXECUTION_REC = 11625
+ER_GRP_RPL_WHILE_SENDING_MSG_REC = 11626
+ER_GRP_RPL_READ_UNABLE_FOR_SUPER_READ_ONLY = 11627
+ER_GRP_RPL_READ_UNABLE_FOR_READ_ONLY_SUPER_READ_ONLY = 11628
+ER_GRP_RPL_UNABLE_TO_RESET_SERVER_READ_MODE = 11629
+ER_GRP_RPL_UNABLE_TO_CERTIFY_PLUGIN_TRANS = 11630
+ER_GRP_RPL_UNBLOCK_CERTIFIED_TRANS = 11631
+ER_GRP_RPL_SERVER_WORKING_AS_SECONDARY = 11632
+ER_GRP_RPL_FAILED_TO_START_WITH_INVALID_SERVER_ID = 11633
+ER_GRP_RPL_FORCE_MEMBERS_MUST_BE_EMPTY = 11634
+ER_GRP_RPL_PLUGIN_STRUCT_INIT_NOT_POSSIBLE_ON_SERVER_START = 11635
+ER_GRP_RPL_FAILED_TO_ENABLE_SUPER_READ_ONLY_MODE = 11636
+ER_GRP_RPL_FAILED_TO_INIT_COMMUNICATION_ENGINE = 11637
+ER_GRP_RPL_FAILED_TO_START_ON_SECONDARY_WITH_ASYNC_CHANNELS = 11638
+ER_GRP_RPL_FAILED_TO_START_COMMUNICATION_ENGINE = 11639
+ER_GRP_RPL_TIMEOUT_ON_VIEW_AFTER_JOINING_GRP = 11640
+ER_GRP_RPL_FAILED_TO_CALL_GRP_COMMUNICATION_INTERFACE = 11641
+ER_GRP_RPL_MEMBER_SERVER_UUID_IS_INCOMPATIBLE_WITH_GRP = 11642
+ER_GRP_RPL_MEMBER_CONF_INFO = 11643
+ER_GRP_RPL_FAILED_TO_CONFIRM_IF_SERVER_LEFT_GRP = 11644
+ER_GRP_RPL_SERVER_IS_ALREADY_LEAVING = 11645
+ER_GRP_RPL_SERVER_ALREADY_LEFT = 11646
+ER_GRP_RPL_WAITING_FOR_VIEW_UPDATE = 11647
+ER_GRP_RPL_TIMEOUT_RECEIVING_VIEW_CHANGE_ON_SHUTDOWN = 11648
+ER_GRP_RPL_REQUESTING_NON_MEMBER_SERVER_TO_LEAVE = 11649
+ER_GRP_RPL_IS_STOPPING = 11650
+ER_GRP_RPL_IS_STOPPED = 11651
+ER_GRP_RPL_FAILED_TO_ENABLE_READ_ONLY_MODE_ON_SHUTDOWN = 11652
+ER_GRP_RPL_RECOVERY_MODULE_TERMINATION_TIMED_OUT_ON_SHUTDOWN = 11653
+ER_GRP_RPL_APPLIER_TERMINATION_TIMED_OUT_ON_SHUTDOWN = 11654
+ER_GRP_RPL_FAILED_TO_SHUTDOWN_REGISTRY_MODULE = 11655
+ER_GRP_RPL_FAILED_TO_INIT_HANDLER = 11656
+ER_GRP_RPL_FAILED_TO_REGISTER_SERVER_STATE_OBSERVER = 11657
+ER_GRP_RPL_FAILED_TO_REGISTER_TRANS_STATE_OBSERVER = 11658
+ER_GRP_RPL_FAILED_TO_REGISTER_BINLOG_STATE_OBSERVER = 11659
+ER_GRP_RPL_FAILED_TO_START_ON_BOOT = 11660
+ER_GRP_RPL_FAILED_TO_STOP_ON_PLUGIN_UNINSTALL = 11661
+ER_GRP_RPL_FAILED_TO_UNREGISTER_SERVER_STATE_OBSERVER = 11662
+ER_GRP_RPL_FAILED_TO_UNREGISTER_TRANS_STATE_OBSERVER = 11663
+ER_GRP_RPL_FAILED_TO_UNREGISTER_BINLOG_STATE_OBSERVER = 11664
+ER_GRP_RPL_ALL_OBSERVERS_UNREGISTERED = 11665
+ER_GRP_RPL_FAILED_TO_PARSE_THE_GRP_NAME = 11666
+ER_GRP_RPL_FAILED_TO_GENERATE_SIDNO_FOR_GRP = 11667
+ER_GRP_RPL_APPLIER_NOT_STARTED_DUE_TO_RUNNING_PREV_SHUTDOWN = 11668
+ER_GRP_RPL_FAILED_TO_INIT_APPLIER_MODULE = 11669
+ER_GRP_RPL_APPLIER_INITIALIZED = 11670
+ER_GRP_RPL_COMMUNICATION_SSL_CONF_INFO = 11671
+ER_GRP_RPL_ABORTS_AS_SSL_NOT_SUPPORTED_BY_MYSQLD = 11672
+ER_GRP_RPL_SSL_DISABLED = 11673
+ER_GRP_RPL_UNABLE_TO_INIT_COMMUNICATION_ENGINE = 11674
+ER_GRP_RPL_BINLOG_DISABLED = 11675
+ER_GRP_RPL_GTID_MODE_OFF = 11676
+ER_GRP_RPL_LOG_SLAVE_UPDATES_NOT_SET = 11677
+ER_GRP_RPL_INVALID_TRANS_WRITE_SET_EXTRACTION_VALUE = 11678
+ER_GRP_RPL_RELAY_LOG_INFO_REPO_MUST_BE_TABLE = 11679
+ER_GRP_RPL_MASTER_INFO_REPO_MUST_BE_TABLE = 11680
+ER_GRP_RPL_INCORRECT_TYPE_SET_FOR_PARALLEL_APPLIER = 11681
+ER_GRP_RPL_SLAVE_PRESERVE_COMMIT_ORDER_NOT_SET = 11682
+ER_GRP_RPL_SINGLE_PRIM_MODE_NOT_ALLOWED_WITH_UPDATE_EVERYWHERE = 11683
+ER_GRP_RPL_MODULE_TERMINATE_ERROR = 11684
+ER_GRP_RPL_GRP_NAME_OPTION_MANDATORY = 11685
+ER_GRP_RPL_GRP_NAME_IS_TOO_LONG = 11686
+ER_GRP_RPL_GRP_NAME_IS_NOT_VALID_UUID = 11687
+ER_GRP_RPL_FLOW_CTRL_MIN_QUOTA_GREATER_THAN_MAX_QUOTA = 11688
+ER_GRP_RPL_FLOW_CTRL_MIN_RECOVERY_QUOTA_GREATER_THAN_MAX_QUOTA = 11689
+ER_GRP_RPL_FLOW_CTRL_MAX_QUOTA_SMALLER_THAN_MIN_QUOTAS = 11690
+ER_GRP_RPL_INVALID_SSL_RECOVERY_STRING = 11691
+ER_GRP_RPL_SUPPORTS_ONLY_ONE_FORCE_MEMBERS_SET = 11692
+ER_GRP_RPL_FORCE_MEMBERS_SET_UPDATE_NOT_ALLOWED = 11693
+ER_GRP_RPL_GRP_COMMUNICATION_INIT_WITH_CONF = 11694
+ER_GRP_RPL_UNKNOWN_GRP_RPL_APPLIER_PIPELINE_REQUESTED = 11695
+ER_GRP_RPL_FAILED_TO_BOOTSTRAP_EVENT_HANDLING_INFRASTRUCTURE = 11696
+ER_GRP_RPL_APPLIER_HANDLER_NOT_INITIALIZED = 11697
+ER_GRP_RPL_APPLIER_HANDLER_IS_IN_USE = 11698
+ER_GRP_RPL_APPLIER_HANDLER_ROLE_IS_IN_USE = 11699
+ER_GRP_RPL_FAILED_TO_INIT_APPLIER_HANDLER = 11700
+ER_GRP_RPL_SQL_SERVICE_FAILED_TO_INIT_SESSION_THREAD = 11701
+ER_GRP_RPL_SQL_SERVICE_COMM_SESSION_NOT_INITIALIZED = 11702
+ER_GRP_RPL_SQL_SERVICE_SERVER_SESSION_KILLED = 11703
+ER_GRP_RPL_SQL_SERVICE_FAILED_TO_RUN_SQL_QUERY = 11704
+ER_GRP_RPL_SQL_SERVICE_SERVER_INTERNAL_FAILURE = 11705
+ER_GRP_RPL_SQL_SERVICE_RETRIES_EXCEEDED_ON_SESSION_STATE = 11706
+ER_GRP_RPL_SQL_SERVICE_FAILED_TO_FETCH_SECURITY_CTX = 11707
+ER_GRP_RPL_SQL_SERVICE_SERVER_ACCESS_DENIED_FOR_USER = 11708
+ER_GRP_RPL_SQL_SERVICE_MAX_CONN_ERROR_FROM_SERVER = 11709
+ER_GRP_RPL_SQL_SERVICE_SERVER_ERROR_ON_CONN = 11710
+ER_GRP_RPL_UNREACHABLE_MAJORITY_TIMEOUT_FOR_MEMBER = 11711
+ER_GRP_RPL_SERVER_SET_TO_READ_ONLY_DUE_TO_ERRORS = 11712
+ER_GRP_RPL_GMS_LISTENER_FAILED_TO_LOG_NOTIFICATION = 11713
+ER_GRP_RPL_GRP_COMMUNICATION_ENG_INIT_FAILED = 11714
+ER_GRP_RPL_SET_GRP_COMMUNICATION_ENG_LOGGER_FAILED = 11715
+ER_GRP_RPL_DEBUG_OPTIONS = 11716
+ER_GRP_RPL_INVALID_DEBUG_OPTIONS = 11717
+ER_GRP_RPL_EXIT_GRP_GCS_ERROR = 11718
+ER_GRP_RPL_GRP_MEMBER_OFFLINE = 11719
+ER_GRP_RPL_GCS_INTERFACE_ERROR = 11720
+ER_GRP_RPL_FORCE_MEMBER_VALUE_SET_ERROR = 11721
+ER_GRP_RPL_FORCE_MEMBER_VALUE_SET = 11722
+ER_GRP_RPL_FORCE_MEMBER_VALUE_TIME_OUT = 11723
+ER_GRP_RPL_BROADCAST_COMMIT_MSSG_TOO_BIG = 11724
+ER_GRP_RPL_SEND_STATS_ERROR = 11725
+ER_GRP_RPL_MEMBER_STATS_INFO = 11726
+ER_GRP_RPL_FLOW_CONTROL_STATS = 11727
+ER_GRP_RPL_UNABLE_TO_CONVERT_PACKET_TO_EVENT = 11728
+ER_GRP_RPL_PIPELINE_CREATE_FAILED = 11729
+ER_GRP_RPL_PIPELINE_REINIT_FAILED_WRITE = 11730
+ER_GRP_RPL_UNABLE_TO_CONVERT_EVENT_TO_PACKET = 11731
+ER_GRP_RPL_PIPELINE_FLUSH_FAIL = 11732
+ER_GRP_RPL_PIPELINE_REINIT_FAILED_READ = 11733
+ER_GRP_RPL_STOP_REP_CHANNEL = 11734
+ER_GRP_RPL_GCS_GR_ERROR_MSG = 11735
+ER_GRP_RPL_SLAVE_IO_THREAD_UNBLOCKED = 11736
+ER_GRP_RPL_SLAVE_IO_THREAD_ERROR_OUT = 11737
+ER_GRP_RPL_SLAVE_APPLIER_THREAD_UNBLOCKED = 11738
+ER_GRP_RPL_SLAVE_APPLIER_THREAD_ERROR_OUT = 11739
+ER_LDAP_AUTH_FAILED_TO_CREATE_OR_GET_CONNECTION = 11740
+ER_LDAP_AUTH_DEINIT_FAILED = 11741
+ER_LDAP_AUTH_SKIPPING_USER_GROUP_SEARCH = 11742
+ER_LDAP_AUTH_POOL_DISABLE_MAX_SIZE_ZERO = 11743
+ER_LDAP_AUTH_FAILED_TO_CREATE_LDAP_OBJECT_CREATOR = 11744
+ER_LDAP_AUTH_FAILED_TO_CREATE_LDAP_OBJECT = 11745
+ER_LDAP_AUTH_TLS_CONF = 11746
+ER_LDAP_AUTH_TLS_CONNECTION = 11747
+ER_LDAP_AUTH_CONN_POOL_NOT_CREATED = 11748
+ER_LDAP_AUTH_CONN_POOL_INITIALIZING = 11749
+ER_LDAP_AUTH_CONN_POOL_DEINITIALIZING = 11750
+ER_LDAP_AUTH_ZERO_MAX_POOL_SIZE_UNCHANGED = 11751
+ER_LDAP_AUTH_POOL_REINITIALIZING = 11752
+ER_LDAP_AUTH_FAILED_TO_WRITE_PACKET = 11753
+ER_LDAP_AUTH_SETTING_USERNAME = 11754
+ER_LDAP_AUTH_USER_AUTH_DATA = 11755
+ER_LDAP_AUTH_INFO_FOR_USER = 11756
+ER_LDAP_AUTH_USER_GROUP_SEARCH_INFO = 11757
+ER_LDAP_AUTH_GRP_SEARCH_SPECIAL_HDL = 11758
+ER_LDAP_AUTH_GRP_IS_FULL_DN = 11759
+ER_LDAP_AUTH_USER_NOT_FOUND_IN_ANY_GRP = 11760
+ER_LDAP_AUTH_USER_FOUND_IN_MANY_GRPS = 11761
+ER_LDAP_AUTH_USER_HAS_MULTIPLE_GRP_NAMES = 11762
+ER_LDAP_AUTH_SEARCHED_USER_GRP_NAME = 11763
+ER_LDAP_AUTH_OBJECT_CREATE_TIMESTAMP = 11764
+ER_LDAP_AUTH_CERTIFICATE_NAME = 11765
+ER_LDAP_AUTH_FAILED_TO_POOL_DEINIT = 11766
+ER_LDAP_AUTH_FAILED_TO_INITIALIZE_POOL_IN_RECONSTRUCTING = 11767
+ER_LDAP_AUTH_FAILED_TO_INITIALIZE_POOL_IN_INIT_STATE = 11768
+ER_LDAP_AUTH_FAILED_TO_INITIALIZE_POOL_IN_DEINIT_STATE = 11769
+ER_LDAP_AUTH_FAILED_TO_DEINITIALIZE_POOL_IN_RECONSTRUCT_STATE = 11770
+ER_LDAP_AUTH_FAILED_TO_DEINITIALIZE_NOT_READY_POOL = 11771
+ER_LDAP_AUTH_FAILED_TO_GET_CONNECTION_AS_PLUGIN_NOT_READY = 11772
+ER_LDAP_AUTH_CONNECTION_POOL_INIT_FAILED = 11773
+ER_LDAP_AUTH_MAX_ALLOWED_CONNECTION_LIMIT_HIT = 11774
+ER_LDAP_AUTH_MAX_POOL_SIZE_SET_FAILED = 11775
+ER_LDAP_AUTH_PLUGIN_FAILED_TO_READ_PACKET = 11776
+ER_LDAP_AUTH_CREATING_LDAP_CONNECTION = 11777
+ER_LDAP_AUTH_GETTING_CONNECTION_FROM_POOL = 11778
+ER_LDAP_AUTH_RETURNING_CONNECTION_TO_POOL = 11779
+ER_LDAP_AUTH_SEARCH_USER_GROUP_ATTR_NOT_FOUND = 11780
+ER_LDAP_AUTH_LDAP_INFO_NULL = 11781
+ER_LDAP_AUTH_FREEING_CONNECTION = 11782
+ER_LDAP_AUTH_CONNECTION_PUSHED_TO_POOL = 11783
+ER_LDAP_AUTH_CONNECTION_CREATOR_ENTER = 11784
+ER_LDAP_AUTH_STARTING_TLS = 11785
+ER_LDAP_AUTH_CONNECTION_GET_LDAP_INFO_NULL = 11786
+ER_LDAP_AUTH_DELETING_CONNECTION_KEY = 11787
+ER_LDAP_AUTH_POOLED_CONNECTION_KEY = 11788
+ER_LDAP_AUTH_CREATE_CONNECTION_KEY = 11789
+ER_LDAP_AUTH_COMMUNICATION_HOST_INFO = 11790
+ER_LDAP_AUTH_METHOD_TO_CLIENT = 11791
+ER_LDAP_AUTH_SASL_REQUEST_FROM_CLIENT = 11792
+ER_LDAP_AUTH_SASL_PROCESS_SASL = 11793
+ER_LDAP_AUTH_SASL_BIND_SUCCESS_INFO = 11794
+ER_LDAP_AUTH_STARTED_FOR_USER = 11795
+ER_LDAP_AUTH_DISTINGUISHED_NAME = 11796
+ER_LDAP_AUTH_INIT_FAILED = 11797
+ER_LDAP_AUTH_OR_GROUP_RETRIEVAL_FAILED = 11798
+ER_LDAP_AUTH_USER_GROUP_SEARCH_FAILED = 11799
+ER_LDAP_AUTH_USER_BIND_FAILED = 11800
+ER_LDAP_AUTH_POOL_GET_FAILED_TO_CREATE_CONNECTION = 11801
+ER_LDAP_AUTH_FAILED_TO_CREATE_LDAP_CONNECTION = 11802
+ER_LDAP_AUTH_FAILED_TO_ESTABLISH_TLS_CONNECTION = 11803
+ER_LDAP_AUTH_FAILED_TO_SEARCH_DN = 11804
+ER_LDAP_AUTH_CONNECTION_POOL_REINIT_ENTER = 11805
+ER_SYSTEMD_NOTIFY_PATH_TOO_LONG = 11806
+ER_SYSTEMD_NOTIFY_CONNECT_FAILED = 11807
+ER_SYSTEMD_NOTIFY_WRITE_FAILED = 11808
+ER_FOUND_MISSING_GTIDS = 11809
+ER_PID_FILE_PRIV_DIRECTORY_INSECURE = 11810
+ER_CANT_CHECK_PID_PATH = 11811
+ER_VALIDATE_PWD_STATUS_VAR_REGISTRATION_FAILED = 11812
+ER_VALIDATE_PWD_STATUS_VAR_UNREGISTRATION_FAILED = 11813
+ER_VALIDATE_PWD_DICT_FILE_OPEN_FAILED = 11814
+ER_VALIDATE_PWD_COULD_BE_NULL = 11815
+ER_VALIDATE_PWD_STRING_CONV_TO_LOWERCASE_FAILED = 11816
+ER_VALIDATE_PWD_STRING_CONV_TO_BUFFER_FAILED = 11817
+ER_VALIDATE_PWD_STRING_HANDLER_MEM_ALLOCATION_FAILED = 11818
+ER_VALIDATE_PWD_STRONG_POLICY_DICT_FILE_UNSPECIFIED = 11819
+ER_VALIDATE_PWD_CONVERT_TO_BUFFER_FAILED = 11820
+ER_VALIDATE_PWD_VARIABLE_REGISTRATION_FAILED = 11821
+ER_VALIDATE_PWD_VARIABLE_UNREGISTRATION_FAILED = 11822
+ER_KEYRING_MIGRATION_EXTRA_OPTIONS = 11823
+OBSOLETE_ER_INVALID_DEFAULT_UTF8MB4_COLLATION = 11824
+ER_IB_MSG_0 = 11825
+ER_IB_MSG_1 = 11826
+ER_IB_MSG_2 = 11827
+ER_IB_MSG_3 = 11828
+ER_IB_MSG_4 = 11829
+ER_IB_MSG_5 = 11830
+ER_IB_MSG_6 = 11831
+ER_IB_MSG_7 = 11832
+ER_IB_MSG_8 = 11833
+ER_IB_MSG_9 = 11834
+ER_IB_MSG_10 = 11835
+ER_IB_MSG_11 = 11836
+ER_IB_MSG_12 = 11837
+ER_IB_MSG_13 = 11838
+ER_IB_MSG_14 = 11839
+ER_IB_MSG_15 = 11840
+ER_IB_MSG_16 = 11841
+ER_IB_MSG_17 = 11842
+ER_IB_MSG_18 = 11843
+ER_IB_MSG_19 = 11844
+ER_IB_MSG_20 = 11845
+ER_IB_MSG_21 = 11846
+ER_IB_MSG_22 = 11847
+ER_IB_MSG_23 = 11848
+ER_IB_MSG_24 = 11849
+ER_IB_MSG_25 = 11850
+ER_IB_MSG_26 = 11851
+ER_IB_MSG_27 = 11852
+ER_IB_MSG_28 = 11853
+ER_IB_MSG_29 = 11854
+ER_IB_MSG_30 = 11855
+ER_IB_MSG_31 = 11856
+ER_IB_MSG_32 = 11857
+ER_IB_MSG_33 = 11858
+ER_IB_MSG_34 = 11859
+ER_IB_MSG_35 = 11860
+ER_IB_MSG_36 = 11861
+ER_IB_MSG_37 = 11862
+ER_IB_MSG_38 = 11863
+ER_IB_MSG_39 = 11864
+ER_IB_MSG_40 = 11865
+ER_IB_MSG_41 = 11866
+ER_IB_MSG_42 = 11867
+ER_IB_MSG_43 = 11868
+ER_IB_MSG_44 = 11869
+ER_IB_MSG_45 = 11870
+ER_IB_MSG_46 = 11871
+ER_IB_MSG_47 = 11872
+ER_IB_MSG_48 = 11873
+ER_IB_MSG_49 = 11874
+ER_IB_MSG_50 = 11875
+ER_IB_MSG_51 = 11876
+ER_IB_MSG_52 = 11877
+ER_IB_MSG_53 = 11878
+ER_IB_MSG_54 = 11879
+ER_IB_MSG_55 = 11880
+ER_IB_MSG_56 = 11881
+ER_IB_MSG_57 = 11882
+ER_IB_MSG_58 = 11883
+ER_IB_MSG_59 = 11884
+ER_IB_MSG_60 = 11885
+ER_IB_MSG_61 = 11886
+ER_IB_MSG_62 = 11887
+ER_IB_MSG_63 = 11888
+ER_IB_MSG_64 = 11889
+ER_IB_MSG_65 = 11890
+ER_IB_MSG_66 = 11891
+ER_IB_MSG_67 = 11892
+ER_IB_MSG_68 = 11893
+ER_IB_MSG_69 = 11894
+ER_IB_MSG_70 = 11895
+ER_IB_MSG_71 = 11896
+ER_IB_MSG_72 = 11897
+ER_IB_MSG_73 = 11898
+ER_IB_MSG_74 = 11899
+ER_IB_MSG_75 = 11900
+ER_IB_MSG_76 = 11901
+ER_IB_MSG_77 = 11902
+ER_IB_MSG_78 = 11903
+ER_IB_MSG_79 = 11904
+ER_IB_MSG_80 = 11905
+ER_IB_MSG_81 = 11906
+ER_IB_MSG_82 = 11907
+ER_IB_MSG_83 = 11908
+ER_IB_MSG_84 = 11909
+ER_IB_MSG_85 = 11910
+ER_IB_MSG_86 = 11911
+ER_IB_MSG_87 = 11912
+ER_IB_MSG_88 = 11913
+ER_IB_MSG_89 = 11914
+ER_IB_MSG_90 = 11915
+ER_IB_MSG_91 = 11916
+ER_IB_MSG_92 = 11917
+ER_IB_MSG_93 = 11918
+ER_IB_MSG_94 = 11919
+ER_IB_MSG_95 = 11920
+ER_IB_MSG_96 = 11921
+ER_IB_MSG_97 = 11922
+ER_IB_MSG_98 = 11923
+ER_IB_MSG_99 = 11924
+ER_IB_MSG_100 = 11925
+ER_IB_MSG_101 = 11926
+ER_IB_MSG_102 = 11927
+ER_IB_MSG_103 = 11928
+ER_IB_MSG_104 = 11929
+ER_IB_MSG_105 = 11930
+ER_IB_MSG_106 = 11931
+ER_IB_MSG_107 = 11932
+ER_IB_MSG_108 = 11933
+ER_IB_MSG_109 = 11934
+ER_IB_MSG_110 = 11935
+ER_IB_MSG_111 = 11936
+ER_IB_MSG_112 = 11937
+ER_IB_MSG_113 = 11938
+ER_IB_MSG_114 = 11939
+ER_IB_MSG_115 = 11940
+ER_IB_MSG_116 = 11941
+ER_IB_MSG_117 = 11942
+ER_IB_MSG_118 = 11943
+ER_IB_MSG_119 = 11944
+ER_IB_MSG_120 = 11945
+ER_IB_MSG_121 = 11946
+ER_IB_MSG_122 = 11947
+ER_IB_MSG_123 = 11948
+ER_IB_MSG_124 = 11949
+ER_IB_MSG_125 = 11950
+ER_IB_MSG_126 = 11951
+ER_IB_MSG_127 = 11952
+ER_IB_MSG_128 = 11953
+ER_IB_MSG_129 = 11954
+ER_IB_MSG_130 = 11955
+ER_IB_MSG_131 = 11956
+ER_IB_MSG_132 = 11957
+ER_IB_MSG_133 = 11958
+ER_IB_MSG_134 = 11959
+ER_IB_MSG_135 = 11960
+ER_IB_MSG_136 = 11961
+ER_IB_MSG_137 = 11962
+ER_IB_MSG_138 = 11963
+ER_IB_MSG_139 = 11964
+ER_IB_MSG_140 = 11965
+ER_IB_MSG_141 = 11966
+ER_IB_MSG_142 = 11967
+ER_IB_MSG_143 = 11968
+ER_IB_MSG_144 = 11969
+ER_IB_MSG_145 = 11970
+ER_IB_MSG_146 = 11971
+ER_IB_MSG_147 = 11972
+ER_IB_MSG_148 = 11973
+ER_IB_MSG_149 = 11974
+ER_IB_MSG_150 = 11975
+ER_IB_MSG_151 = 11976
+ER_IB_MSG_152 = 11977
+ER_IB_MSG_153 = 11978
+ER_IB_MSG_154 = 11979
+ER_IB_MSG_155 = 11980
+ER_IB_MSG_156 = 11981
+ER_IB_MSG_157 = 11982
+ER_IB_MSG_158 = 11983
+ER_IB_MSG_159 = 11984
+ER_IB_MSG_160 = 11985
+ER_IB_MSG_161 = 11986
+ER_IB_MSG_162 = 11987
+ER_IB_MSG_163 = 11988
+ER_IB_MSG_164 = 11989
+ER_IB_MSG_165 = 11990
+ER_IB_MSG_166 = 11991
+ER_IB_MSG_167 = 11992
+ER_IB_MSG_168 = 11993
+ER_IB_MSG_169 = 11994
+ER_IB_MSG_170 = 11995
+ER_IB_MSG_171 = 11996
+ER_IB_MSG_172 = 11997
+ER_IB_MSG_173 = 11998
+ER_IB_MSG_174 = 11999
+ER_IB_MSG_175 = 12000
+ER_IB_MSG_176 = 12001
+ER_IB_MSG_177 = 12002
+ER_IB_MSG_178 = 12003
+ER_IB_MSG_179 = 12004
+ER_IB_MSG_180 = 12005
+ER_IB_MSG_181 = 12006
+ER_IB_MSG_182 = 12007
+ER_IB_MSG_183 = 12008
+ER_IB_MSG_184 = 12009
+ER_IB_MSG_185 = 12010
+ER_IB_MSG_186 = 12011
+ER_IB_MSG_187 = 12012
+ER_IB_MSG_188 = 12013
+ER_IB_MSG_189 = 12014
+ER_IB_MSG_190 = 12015
+ER_IB_MSG_191 = 12016
+ER_IB_MSG_192 = 12017
+ER_IB_MSG_193 = 12018
+ER_IB_MSG_194 = 12019
+ER_IB_MSG_195 = 12020
+ER_IB_MSG_196 = 12021
+ER_IB_MSG_197 = 12022
+ER_IB_MSG_198 = 12023
+ER_IB_MSG_199 = 12024
+ER_IB_MSG_200 = 12025
+ER_IB_MSG_201 = 12026
+ER_IB_MSG_202 = 12027
+ER_IB_MSG_203 = 12028
+ER_IB_MSG_204 = 12029
+ER_IB_MSG_205 = 12030
+ER_IB_MSG_206 = 12031
+ER_IB_MSG_207 = 12032
+ER_IB_MSG_208 = 12033
+ER_IB_MSG_209 = 12034
+ER_IB_MSG_210 = 12035
+ER_IB_MSG_211 = 12036
+ER_IB_MSG_212 = 12037
+ER_IB_MSG_213 = 12038
+ER_IB_MSG_214 = 12039
+ER_IB_MSG_215 = 12040
+ER_IB_MSG_216 = 12041
+ER_IB_MSG_217 = 12042
+ER_IB_MSG_218 = 12043
+ER_IB_MSG_219 = 12044
+ER_IB_MSG_220 = 12045
+ER_IB_MSG_221 = 12046
+ER_IB_MSG_222 = 12047
+ER_IB_MSG_223 = 12048
+ER_IB_MSG_224 = 12049
+ER_IB_MSG_225 = 12050
+ER_IB_MSG_226 = 12051
+ER_IB_MSG_227 = 12052
+ER_IB_MSG_228 = 12053
+ER_IB_MSG_229 = 12054
+ER_IB_MSG_230 = 12055
+ER_IB_MSG_231 = 12056
+ER_IB_MSG_232 = 12057
+ER_IB_MSG_233 = 12058
+ER_IB_MSG_234 = 12059
+ER_IB_MSG_235 = 12060
+ER_IB_MSG_236 = 12061
+ER_IB_MSG_237 = 12062
+ER_IB_MSG_238 = 12063
+ER_IB_MSG_239 = 12064
+ER_IB_MSG_240 = 12065
+ER_IB_MSG_241 = 12066
+ER_IB_MSG_242 = 12067
+ER_IB_MSG_243 = 12068
+ER_IB_MSG_244 = 12069
+ER_IB_MSG_245 = 12070
+ER_IB_MSG_246 = 12071
+ER_IB_MSG_247 = 12072
+ER_IB_MSG_248 = 12073
+ER_IB_MSG_249 = 12074
+ER_IB_MSG_250 = 12075
+ER_IB_MSG_251 = 12076
+ER_IB_MSG_252 = 12077
+ER_IB_MSG_253 = 12078
+ER_IB_MSG_254 = 12079
+ER_IB_MSG_255 = 12080
+ER_IB_MSG_256 = 12081
+ER_IB_MSG_257 = 12082
+ER_IB_MSG_258 = 12083
+ER_IB_MSG_259 = 12084
+ER_IB_MSG_260 = 12085
+ER_IB_MSG_261 = 12086
+ER_IB_MSG_262 = 12087
+ER_IB_MSG_263 = 12088
+ER_IB_MSG_264 = 12089
+ER_IB_MSG_265 = 12090
+ER_IB_MSG_266 = 12091
+ER_IB_MSG_267 = 12092
+ER_IB_MSG_268 = 12093
+ER_IB_MSG_269 = 12094
+ER_IB_MSG_270 = 12095
+ER_IB_MSG_271 = 12096
+ER_IB_MSG_272 = 12097
+ER_IB_MSG_273 = 12098
+ER_IB_MSG_274 = 12099
+ER_IB_MSG_275 = 12100
+ER_IB_MSG_276 = 12101
+ER_IB_MSG_277 = 12102
+ER_IB_MSG_278 = 12103
+ER_IB_MSG_279 = 12104
+ER_IB_MSG_280 = 12105
+ER_IB_MSG_281 = 12106
+ER_IB_MSG_282 = 12107
+ER_IB_MSG_283 = 12108
+ER_IB_MSG_284 = 12109
+ER_IB_MSG_285 = 12110
+ER_IB_MSG_286 = 12111
+ER_IB_MSG_287 = 12112
+ER_IB_MSG_288 = 12113
+ER_IB_MSG_289 = 12114
+ER_IB_MSG_290 = 12115
+ER_IB_MSG_291 = 12116
+ER_IB_MSG_292 = 12117
+ER_IB_MSG_293 = 12118
+ER_IB_MSG_294 = 12119
+ER_IB_MSG_295 = 12120
+ER_IB_MSG_296 = 12121
+ER_IB_MSG_297 = 12122
+ER_IB_MSG_298 = 12123
+ER_IB_MSG_299 = 12124
+ER_IB_MSG_300 = 12125
+ER_IB_MSG_301 = 12126
+ER_IB_MSG_302 = 12127
+ER_IB_MSG_303 = 12128
+ER_IB_MSG_304 = 12129
+ER_IB_MSG_305 = 12130
+ER_IB_MSG_306 = 12131
+ER_IB_MSG_307 = 12132
+ER_IB_MSG_308 = 12133
+ER_IB_MSG_309 = 12134
+ER_IB_MSG_310 = 12135
+ER_IB_MSG_311 = 12136
+ER_IB_MSG_312 = 12137
+ER_IB_MSG_313 = 12138
+ER_IB_MSG_314 = 12139
+ER_IB_MSG_315 = 12140
+ER_IB_MSG_316 = 12141
+ER_IB_MSG_317 = 12142
+ER_IB_MSG_318 = 12143
+ER_IB_MSG_319 = 12144
+ER_IB_MSG_320 = 12145
+ER_IB_MSG_321 = 12146
+ER_IB_MSG_322 = 12147
+ER_IB_MSG_323 = 12148
+ER_IB_MSG_324 = 12149
+ER_IB_MSG_325 = 12150
+ER_IB_MSG_326 = 12151
+ER_IB_MSG_327 = 12152
+ER_IB_MSG_328 = 12153
+ER_IB_MSG_329 = 12154
+ER_IB_MSG_330 = 12155
+ER_IB_MSG_331 = 12156
+ER_IB_MSG_332 = 12157
+ER_IB_MSG_333 = 12158
+ER_IB_MSG_334 = 12159
+ER_IB_MSG_335 = 12160
+ER_IB_MSG_336 = 12161
+ER_IB_MSG_337 = 12162
+ER_IB_MSG_338 = 12163
+ER_IB_MSG_339 = 12164
+ER_IB_MSG_340 = 12165
+ER_IB_MSG_341 = 12166
+ER_IB_MSG_342 = 12167
+ER_IB_MSG_343 = 12168
+ER_IB_MSG_344 = 12169
+ER_IB_MSG_345 = 12170
+ER_IB_MSG_346 = 12171
+ER_IB_MSG_347 = 12172
+ER_IB_MSG_348 = 12173
+ER_IB_MSG_349 = 12174
+ER_IB_MSG_350 = 12175
+ER_IB_MSG_351 = 12176
+ER_IB_MSG_352 = 12177
+ER_IB_MSG_353 = 12178
+ER_IB_MSG_354 = 12179
+ER_IB_MSG_355 = 12180
+ER_IB_MSG_356 = 12181
+ER_IB_MSG_357 = 12182
+ER_IB_MSG_358 = 12183
+ER_IB_MSG_359 = 12184
+ER_IB_MSG_360 = 12185
+ER_IB_MSG_361 = 12186
+ER_IB_MSG_362 = 12187
+ER_IB_MSG_363 = 12188
+ER_IB_MSG_364 = 12189
+ER_IB_MSG_365 = 12190
+ER_IB_MSG_366 = 12191
+ER_IB_MSG_367 = 12192
+ER_IB_MSG_368 = 12193
+ER_IB_MSG_369 = 12194
+ER_IB_MSG_370 = 12195
+ER_IB_MSG_371 = 12196
+ER_IB_MSG_372 = 12197
+ER_IB_MSG_373 = 12198
+ER_IB_MSG_374 = 12199
+ER_IB_MSG_375 = 12200
+ER_IB_MSG_376 = 12201
+ER_IB_MSG_377 = 12202
+ER_IB_MSG_378 = 12203
+ER_IB_MSG_379 = 12204
+ER_IB_MSG_380 = 12205
+ER_IB_MSG_381 = 12206
+ER_IB_MSG_382 = 12207
+ER_IB_MSG_383 = 12208
+ER_IB_MSG_384 = 12209
+ER_IB_MSG_385 = 12210
+ER_IB_MSG_386 = 12211
+ER_IB_MSG_387 = 12212
+ER_IB_MSG_388 = 12213
+ER_IB_MSG_389 = 12214
+ER_IB_MSG_390 = 12215
+ER_IB_MSG_391 = 12216
+ER_IB_MSG_392 = 12217
+ER_IB_MSG_393 = 12218
+ER_IB_MSG_394 = 12219
+ER_IB_MSG_395 = 12220
+ER_IB_MSG_396 = 12221
+ER_IB_MSG_397 = 12222
+ER_IB_MSG_398 = 12223
+ER_IB_MSG_399 = 12224
+ER_IB_MSG_400 = 12225
+ER_IB_MSG_401 = 12226
+ER_IB_MSG_402 = 12227
+ER_IB_MSG_403 = 12228
+ER_IB_MSG_404 = 12229
+ER_IB_MSG_405 = 12230
+ER_IB_MSG_406 = 12231
+ER_IB_MSG_407 = 12232
+ER_IB_MSG_408 = 12233
+ER_IB_MSG_409 = 12234
+ER_IB_MSG_410 = 12235
+ER_IB_MSG_411 = 12236
+ER_IB_MSG_412 = 12237
+ER_IB_MSG_413 = 12238
+ER_IB_MSG_414 = 12239
+ER_IB_MSG_415 = 12240
+ER_IB_MSG_416 = 12241
+ER_IB_MSG_417 = 12242
+ER_IB_MSG_418 = 12243
+ER_IB_MSG_419 = 12244
+ER_IB_MSG_420 = 12245
+ER_IB_MSG_421 = 12246
+ER_IB_MSG_422 = 12247
+ER_IB_MSG_423 = 12248
+ER_IB_MSG_424 = 12249
+ER_IB_MSG_425 = 12250
+ER_IB_MSG_426 = 12251
+ER_IB_MSG_427 = 12252
+ER_IB_MSG_428 = 12253
+ER_IB_MSG_429 = 12254
+ER_IB_MSG_430 = 12255
+ER_IB_MSG_431 = 12256
+ER_IB_MSG_432 = 12257
+ER_IB_MSG_433 = 12258
+ER_IB_MSG_434 = 12259
+ER_IB_MSG_435 = 12260
+ER_IB_MSG_436 = 12261
+ER_IB_MSG_437 = 12262
+ER_IB_MSG_438 = 12263
+ER_IB_MSG_439 = 12264
+ER_IB_MSG_440 = 12265
+ER_IB_MSG_441 = 12266
+ER_IB_MSG_442 = 12267
+ER_IB_MSG_443 = 12268
+ER_IB_MSG_444 = 12269
+ER_IB_MSG_445 = 12270
+ER_IB_MSG_446 = 12271
+ER_IB_MSG_447 = 12272
+ER_IB_MSG_448 = 12273
+ER_IB_MSG_449 = 12274
+ER_IB_MSG_450 = 12275
+ER_IB_MSG_451 = 12276
+ER_IB_MSG_452 = 12277
+ER_IB_MSG_453 = 12278
+ER_IB_MSG_454 = 12279
+ER_IB_MSG_455 = 12280
+ER_IB_MSG_456 = 12281
+ER_IB_MSG_457 = 12282
+ER_IB_MSG_458 = 12283
+ER_IB_MSG_459 = 12284
+ER_IB_MSG_460 = 12285
+ER_IB_MSG_461 = 12286
+ER_IB_MSG_462 = 12287
+ER_IB_MSG_463 = 12288
+ER_IB_MSG_464 = 12289
+ER_IB_MSG_465 = 12290
+ER_IB_MSG_466 = 12291
+ER_IB_MSG_467 = 12292
+ER_IB_MSG_468 = 12293
+ER_IB_MSG_469 = 12294
+ER_IB_MSG_470 = 12295
+ER_IB_MSG_471 = 12296
+ER_IB_MSG_472 = 12297
+ER_IB_MSG_473 = 12298
+ER_IB_MSG_474 = 12299
+ER_IB_MSG_475 = 12300
+ER_IB_MSG_476 = 12301
+ER_IB_MSG_477 = 12302
+ER_IB_MSG_478 = 12303
+ER_IB_MSG_479 = 12304
+ER_IB_MSG_480 = 12305
+ER_IB_MSG_481 = 12306
+ER_IB_MSG_482 = 12307
+ER_IB_MSG_483 = 12308
+ER_IB_MSG_484 = 12309
+ER_IB_MSG_485 = 12310
+ER_IB_MSG_486 = 12311
+ER_IB_MSG_487 = 12312
+ER_IB_MSG_488 = 12313
+ER_IB_MSG_489 = 12314
+ER_IB_MSG_490 = 12315
+ER_IB_MSG_491 = 12316
+ER_IB_MSG_492 = 12317
+ER_IB_MSG_493 = 12318
+ER_IB_MSG_494 = 12319
+ER_IB_MSG_495 = 12320
+ER_IB_MSG_496 = 12321
+ER_IB_MSG_497 = 12322
+ER_IB_MSG_498 = 12323
+ER_IB_MSG_499 = 12324
+ER_IB_MSG_500 = 12325
+ER_IB_MSG_501 = 12326
+ER_IB_MSG_502 = 12327
+ER_IB_MSG_503 = 12328
+ER_IB_MSG_504 = 12329
+ER_IB_MSG_505 = 12330
+ER_IB_MSG_506 = 12331
+ER_IB_MSG_507 = 12332
+ER_IB_MSG_508 = 12333
+ER_IB_MSG_509 = 12334
+ER_IB_MSG_510 = 12335
+ER_IB_MSG_511 = 12336
+ER_IB_MSG_512 = 12337
+ER_IB_MSG_513 = 12338
+ER_IB_MSG_514 = 12339
+ER_IB_MSG_515 = 12340
+ER_IB_MSG_516 = 12341
+ER_IB_MSG_517 = 12342
+ER_IB_MSG_518 = 12343
+ER_IB_MSG_519 = 12344
+ER_IB_MSG_520 = 12345
+ER_IB_MSG_521 = 12346
+ER_IB_MSG_522 = 12347
+ER_IB_MSG_523 = 12348
+ER_IB_MSG_524 = 12349
+ER_IB_MSG_525 = 12350
+ER_IB_MSG_526 = 12351
+ER_IB_MSG_527 = 12352
+ER_IB_MSG_528 = 12353
+ER_IB_MSG_529 = 12354
+ER_IB_MSG_530 = 12355
+ER_IB_MSG_531 = 12356
+ER_IB_MSG_532 = 12357
+ER_IB_MSG_533 = 12358
+ER_IB_MSG_534 = 12359
+ER_IB_MSG_535 = 12360
+ER_IB_MSG_536 = 12361
+ER_IB_MSG_537 = 12362
+ER_IB_MSG_538 = 12363
+ER_IB_MSG_539 = 12364
+ER_IB_MSG_540 = 12365
+ER_IB_MSG_541 = 12366
+ER_IB_MSG_542 = 12367
+ER_IB_MSG_543 = 12368
+ER_IB_MSG_544 = 12369
+ER_IB_MSG_545 = 12370
+ER_IB_MSG_546 = 12371
+ER_IB_MSG_547 = 12372
+ER_IB_MSG_548 = 12373
+ER_IB_MSG_549 = 12374
+ER_IB_MSG_550 = 12375
+ER_IB_MSG_551 = 12376
+ER_IB_MSG_552 = 12377
+ER_IB_MSG_553 = 12378
+ER_IB_MSG_554 = 12379
+ER_IB_MSG_555 = 12380
+ER_IB_MSG_556 = 12381
+ER_IB_MSG_557 = 12382
+ER_IB_MSG_558 = 12383
+ER_IB_MSG_559 = 12384
+ER_IB_MSG_560 = 12385
+ER_IB_MSG_561 = 12386
+ER_IB_MSG_562 = 12387
+ER_IB_MSG_563 = 12388
+ER_IB_MSG_564 = 12389
+ER_IB_MSG_565 = 12390
+ER_IB_MSG_566 = 12391
+ER_IB_MSG_567 = 12392
+ER_IB_MSG_568 = 12393
+ER_IB_MSG_569 = 12394
+ER_IB_MSG_570 = 12395
+ER_IB_MSG_571 = 12396
+ER_IB_MSG_572 = 12397
+ER_IB_MSG_573 = 12398
+ER_IB_MSG_574 = 12399
+ER_IB_MSG_575 = 12400
+ER_IB_MSG_576 = 12401
+ER_IB_MSG_577 = 12402
+ER_IB_MSG_578 = 12403
+ER_IB_MSG_579 = 12404
+ER_IB_MSG_580 = 12405
+ER_IB_MSG_581 = 12406
+ER_IB_MSG_582 = 12407
+ER_IB_MSG_583 = 12408
+ER_IB_MSG_584 = 12409
+ER_IB_MSG_585 = 12410
+ER_IB_MSG_586 = 12411
+ER_IB_MSG_587 = 12412
+ER_IB_MSG_588 = 12413
+ER_IB_MSG_589 = 12414
+ER_IB_MSG_590 = 12415
+ER_IB_MSG_591 = 12416
+ER_IB_MSG_592 = 12417
+ER_IB_MSG_593 = 12418
+ER_IB_MSG_594 = 12419
+ER_IB_MSG_595 = 12420
+ER_IB_MSG_596 = 12421
+ER_IB_MSG_597 = 12422
+ER_IB_MSG_598 = 12423
+ER_IB_MSG_599 = 12424
+ER_IB_MSG_600 = 12425
+ER_IB_MSG_601 = 12426
+ER_IB_MSG_602 = 12427
+ER_IB_MSG_603 = 12428
+ER_IB_MSG_604 = 12429
+ER_IB_MSG_605 = 12430
+ER_IB_MSG_606 = 12431
+ER_IB_MSG_607 = 12432
+ER_IB_MSG_608 = 12433
+ER_IB_MSG_609 = 12434
+ER_IB_MSG_610 = 12435
+ER_IB_MSG_611 = 12436
+ER_IB_MSG_612 = 12437
+ER_IB_MSG_613 = 12438
+ER_IB_MSG_614 = 12439
+ER_IB_MSG_615 = 12440
+ER_IB_MSG_616 = 12441
+ER_IB_MSG_617 = 12442
+ER_IB_MSG_618 = 12443
+ER_IB_MSG_619 = 12444
+ER_IB_MSG_620 = 12445
+ER_IB_MSG_621 = 12446
+ER_IB_MSG_622 = 12447
+ER_IB_MSG_623 = 12448
+ER_IB_MSG_624 = 12449
+ER_IB_MSG_625 = 12450
+ER_IB_MSG_626 = 12451
+ER_IB_MSG_627 = 12452
+ER_IB_MSG_628 = 12453
+ER_IB_MSG_629 = 12454
+ER_IB_MSG_630 = 12455
+ER_IB_MSG_631 = 12456
+ER_IB_MSG_632 = 12457
+ER_IB_MSG_633 = 12458
+ER_IB_MSG_634 = 12459
+ER_IB_MSG_635 = 12460
+ER_IB_MSG_636 = 12461
+ER_IB_MSG_637 = 12462
+ER_IB_MSG_638 = 12463
+ER_IB_MSG_639 = 12464
+ER_IB_MSG_640 = 12465
+ER_IB_MSG_641 = 12466
+ER_IB_MSG_642 = 12467
+ER_IB_MSG_643 = 12468
+ER_IB_MSG_644 = 12469
+ER_IB_MSG_645 = 12470
+ER_IB_MSG_646 = 12471
+ER_IB_MSG_647 = 12472
+ER_IB_MSG_648 = 12473
+ER_IB_MSG_649 = 12474
+ER_IB_MSG_650 = 12475
+ER_IB_MSG_651 = 12476
+ER_IB_MSG_652 = 12477
+ER_IB_MSG_653 = 12478
+ER_IB_MSG_654 = 12479
+ER_IB_MSG_655 = 12480
+ER_IB_MSG_656 = 12481
+ER_IB_MSG_657 = 12482
+ER_IB_MSG_658 = 12483
+ER_IB_MSG_659 = 12484
+ER_IB_MSG_660 = 12485
+ER_IB_MSG_661 = 12486
+ER_IB_MSG_662 = 12487
+ER_IB_MSG_663 = 12488
+ER_IB_MSG_664 = 12489
+ER_IB_MSG_665 = 12490
+ER_IB_MSG_666 = 12491
+ER_IB_MSG_667 = 12492
+ER_IB_MSG_668 = 12493
+ER_IB_MSG_669 = 12494
+ER_IB_MSG_670 = 12495
+ER_IB_MSG_671 = 12496
+ER_IB_MSG_672 = 12497
+ER_IB_MSG_673 = 12498
+ER_IB_MSG_674 = 12499
+ER_IB_MSG_675 = 12500
+ER_IB_MSG_676 = 12501
+ER_IB_MSG_677 = 12502
+ER_IB_MSG_678 = 12503
+ER_IB_MSG_679 = 12504
+ER_IB_MSG_680 = 12505
+ER_IB_MSG_681 = 12506
+ER_IB_MSG_682 = 12507
+ER_IB_MSG_683 = 12508
+ER_IB_MSG_684 = 12509
+ER_IB_MSG_685 = 12510
+ER_IB_MSG_686 = 12511
+ER_IB_MSG_687 = 12512
+ER_IB_MSG_688 = 12513
+ER_IB_MSG_689 = 12514
+ER_IB_MSG_690 = 12515
+ER_IB_MSG_691 = 12516
+ER_IB_MSG_692 = 12517
+ER_IB_MSG_693 = 12518
+ER_IB_MSG_694 = 12519
+ER_IB_MSG_695 = 12520
+ER_IB_MSG_696 = 12521
+ER_IB_MSG_697 = 12522
+ER_IB_MSG_698 = 12523
+ER_IB_MSG_699 = 12524
+ER_IB_MSG_700 = 12525
+ER_IB_MSG_701 = 12526
+ER_IB_MSG_702 = 12527
+ER_IB_MSG_703 = 12528
+ER_IB_MSG_704 = 12529
+ER_IB_MSG_705 = 12530
+ER_IB_MSG_706 = 12531
+ER_IB_MSG_707 = 12532
+ER_IB_MSG_708 = 12533
+ER_IB_MSG_709 = 12534
+ER_IB_MSG_710 = 12535
+ER_IB_MSG_711 = 12536
+ER_IB_MSG_712 = 12537
+ER_IB_MSG_713 = 12538
+ER_IB_MSG_714 = 12539
+ER_IB_MSG_715 = 12540
+ER_IB_MSG_716 = 12541
+ER_IB_MSG_717 = 12542
+ER_IB_MSG_718 = 12543
+ER_IB_MSG_719 = 12544
+ER_IB_MSG_720 = 12545
+ER_IB_MSG_721 = 12546
+ER_IB_MSG_722 = 12547
+ER_IB_MSG_723 = 12548
+ER_IB_MSG_724 = 12549
+ER_IB_MSG_725 = 12550
+ER_IB_MSG_726 = 12551
+ER_IB_MSG_727 = 12552
+ER_IB_MSG_728 = 12553
+ER_IB_MSG_729 = 12554
+ER_IB_MSG_730 = 12555
+ER_IB_MSG_731 = 12556
+ER_IB_MSG_732 = 12557
+ER_IB_MSG_733 = 12558
+ER_IB_MSG_734 = 12559
+ER_IB_MSG_735 = 12560
+ER_IB_MSG_736 = 12561
+ER_IB_MSG_737 = 12562
+ER_IB_MSG_738 = 12563
+ER_IB_MSG_739 = 12564
+ER_IB_MSG_740 = 12565
+ER_IB_MSG_741 = 12566
+ER_IB_MSG_742 = 12567
+ER_IB_MSG_743 = 12568
+ER_IB_MSG_744 = 12569
+ER_IB_MSG_745 = 12570
+ER_IB_MSG_746 = 12571
+ER_IB_MSG_747 = 12572
+ER_IB_MSG_748 = 12573
+ER_IB_MSG_749 = 12574
+ER_IB_MSG_750 = 12575
+ER_IB_MSG_751 = 12576
+ER_IB_MSG_752 = 12577
+ER_IB_MSG_753 = 12578
+ER_IB_MSG_754 = 12579
+ER_IB_MSG_755 = 12580
+ER_IB_MSG_756 = 12581
+ER_IB_MSG_757 = 12582
+ER_IB_MSG_758 = 12583
+ER_IB_MSG_759 = 12584
+ER_IB_MSG_760 = 12585
+ER_IB_MSG_761 = 12586
+ER_IB_MSG_762 = 12587
+ER_IB_MSG_763 = 12588
+ER_IB_MSG_764 = 12589
+ER_IB_MSG_765 = 12590
+ER_IB_MSG_766 = 12591
+ER_IB_MSG_767 = 12592
+ER_IB_MSG_768 = 12593
+ER_IB_MSG_769 = 12594
+ER_IB_MSG_770 = 12595
+ER_IB_MSG_771 = 12596
+ER_IB_MSG_772 = 12597
+ER_IB_MSG_773 = 12598
+ER_IB_MSG_774 = 12599
+ER_IB_MSG_775 = 12600
+ER_IB_MSG_776 = 12601
+ER_IB_MSG_777 = 12602
+ER_IB_MSG_778 = 12603
+ER_IB_MSG_779 = 12604
+ER_IB_MSG_780 = 12605
+ER_IB_MSG_781 = 12606
+ER_IB_MSG_782 = 12607
+ER_IB_MSG_783 = 12608
+ER_IB_MSG_784 = 12609
+ER_IB_MSG_785 = 12610
+ER_IB_MSG_786 = 12611
+ER_IB_MSG_787 = 12612
+ER_IB_MSG_788 = 12613
+ER_IB_MSG_789 = 12614
+ER_IB_MSG_790 = 12615
+ER_IB_MSG_791 = 12616
+ER_IB_MSG_792 = 12617
+ER_IB_MSG_793 = 12618
+ER_IB_MSG_794 = 12619
+ER_IB_MSG_795 = 12620
+ER_IB_MSG_796 = 12621
+ER_IB_MSG_797 = 12622
+ER_IB_MSG_798 = 12623
+ER_IB_MSG_799 = 12624
+ER_IB_MSG_800 = 12625
+ER_IB_MSG_801 = 12626
+ER_IB_MSG_802 = 12627
+ER_IB_MSG_803 = 12628
+ER_IB_MSG_804 = 12629
+ER_IB_MSG_805 = 12630
+ER_IB_MSG_806 = 12631
+ER_IB_MSG_807 = 12632
+ER_IB_MSG_808 = 12633
+ER_IB_MSG_809 = 12634
+ER_IB_MSG_810 = 12635
+ER_IB_MSG_811 = 12636
+ER_IB_MSG_812 = 12637
+ER_IB_MSG_813 = 12638
+ER_IB_MSG_814 = 12639
+ER_IB_MSG_815 = 12640
+ER_IB_MSG_816 = 12641
+ER_IB_MSG_817 = 12642
+ER_IB_MSG_818 = 12643
+ER_IB_MSG_819 = 12644
+ER_IB_MSG_820 = 12645
+ER_IB_MSG_821 = 12646
+ER_IB_MSG_822 = 12647
+ER_IB_MSG_823 = 12648
+ER_IB_MSG_824 = 12649
+ER_IB_MSG_825 = 12650
+ER_IB_MSG_826 = 12651
+ER_IB_MSG_827 = 12652
+ER_IB_MSG_828 = 12653
+ER_IB_MSG_829 = 12654
+ER_IB_MSG_830 = 12655
+ER_IB_MSG_831 = 12656
+ER_IB_MSG_832 = 12657
+ER_IB_MSG_833 = 12658
+ER_IB_MSG_834 = 12659
+ER_IB_MSG_835 = 12660
+ER_IB_MSG_836 = 12661
+ER_IB_MSG_837 = 12662
+ER_IB_MSG_838 = 12663
+ER_IB_MSG_839 = 12664
+ER_IB_MSG_840 = 12665
+ER_IB_MSG_841 = 12666
+ER_IB_MSG_842 = 12667
+ER_IB_MSG_843 = 12668
+ER_IB_MSG_844 = 12669
+ER_IB_MSG_845 = 12670
+ER_IB_MSG_846 = 12671
+ER_IB_MSG_847 = 12672
+ER_IB_MSG_848 = 12673
+ER_IB_MSG_849 = 12674
+ER_IB_MSG_850 = 12675
+ER_IB_MSG_851 = 12676
+ER_IB_MSG_852 = 12677
+ER_IB_MSG_853 = 12678
+ER_IB_MSG_854 = 12679
+ER_IB_MSG_855 = 12680
+ER_IB_MSG_856 = 12681
+ER_IB_MSG_857 = 12682
+ER_IB_MSG_858 = 12683
+ER_IB_MSG_859 = 12684
+ER_IB_MSG_860 = 12685
+ER_IB_MSG_861 = 12686
+ER_IB_MSG_862 = 12687
+ER_IB_MSG_863 = 12688
+ER_IB_MSG_864 = 12689
+ER_IB_MSG_865 = 12690
+ER_IB_MSG_866 = 12691
+ER_IB_MSG_867 = 12692
+ER_IB_MSG_868 = 12693
+ER_IB_MSG_869 = 12694
+ER_IB_MSG_870 = 12695
+ER_IB_MSG_871 = 12696
+ER_IB_MSG_872 = 12697
+ER_IB_MSG_873 = 12698
+ER_IB_MSG_874 = 12699
+ER_IB_MSG_875 = 12700
+ER_IB_MSG_876 = 12701
+ER_IB_MSG_877 = 12702
+ER_IB_MSG_878 = 12703
+ER_IB_MSG_879 = 12704
+ER_IB_MSG_880 = 12705
+ER_IB_MSG_881 = 12706
+ER_IB_MSG_882 = 12707
+ER_IB_MSG_883 = 12708
+ER_IB_MSG_884 = 12709
+ER_IB_MSG_885 = 12710
+ER_IB_MSG_886 = 12711
+ER_IB_MSG_887 = 12712
+ER_IB_MSG_888 = 12713
+ER_IB_MSG_889 = 12714
+ER_IB_MSG_890 = 12715
+ER_IB_MSG_891 = 12716
+ER_IB_MSG_892 = 12717
+ER_IB_MSG_893 = 12718
+ER_IB_MSG_894 = 12719
+ER_IB_MSG_895 = 12720
+ER_IB_MSG_896 = 12721
+ER_IB_MSG_897 = 12722
+ER_IB_MSG_898 = 12723
+ER_IB_MSG_899 = 12724
+ER_IB_MSG_900 = 12725
+ER_IB_MSG_901 = 12726
+ER_IB_MSG_902 = 12727
+ER_IB_MSG_903 = 12728
+ER_IB_MSG_904 = 12729
+ER_IB_MSG_905 = 12730
+ER_IB_MSG_906 = 12731
+ER_IB_MSG_907 = 12732
+ER_IB_MSG_908 = 12733
+ER_IB_MSG_909 = 12734
+ER_IB_MSG_910 = 12735
+ER_IB_MSG_911 = 12736
+ER_IB_MSG_912 = 12737
+ER_IB_MSG_913 = 12738
+ER_IB_MSG_914 = 12739
+ER_IB_MSG_915 = 12740
+ER_IB_MSG_916 = 12741
+ER_IB_MSG_917 = 12742
+ER_IB_MSG_918 = 12743
+ER_IB_MSG_919 = 12744
+ER_IB_MSG_920 = 12745
+ER_IB_MSG_921 = 12746
+ER_IB_MSG_922 = 12747
+ER_IB_MSG_923 = 12748
+ER_IB_MSG_924 = 12749
+ER_IB_MSG_925 = 12750
+ER_IB_MSG_926 = 12751
+ER_IB_MSG_927 = 12752
+ER_IB_MSG_928 = 12753
+ER_IB_MSG_929 = 12754
+ER_IB_MSG_930 = 12755
+ER_IB_MSG_931 = 12756
+ER_IB_MSG_932 = 12757
+ER_IB_MSG_933 = 12758
+ER_IB_MSG_934 = 12759
+ER_IB_MSG_935 = 12760
+ER_IB_MSG_936 = 12761
+ER_IB_MSG_937 = 12762
+ER_IB_MSG_938 = 12763
+ER_IB_MSG_939 = 12764
+ER_IB_MSG_940 = 12765
+ER_IB_MSG_941 = 12766
+ER_IB_MSG_942 = 12767
+ER_IB_MSG_943 = 12768
+ER_IB_MSG_944 = 12769
+ER_IB_MSG_945 = 12770
+ER_IB_MSG_946 = 12771
+ER_IB_MSG_947 = 12772
+ER_IB_MSG_948 = 12773
+ER_IB_MSG_949 = 12774
+ER_IB_MSG_950 = 12775
+ER_IB_MSG_951 = 12776
+ER_IB_MSG_952 = 12777
+ER_IB_MSG_953 = 12778
+ER_IB_MSG_954 = 12779
+ER_IB_MSG_955 = 12780
+ER_IB_MSG_956 = 12781
+ER_IB_MSG_957 = 12782
+ER_IB_MSG_958 = 12783
+ER_IB_MSG_959 = 12784
+ER_IB_MSG_960 = 12785
+ER_IB_MSG_961 = 12786
+ER_IB_MSG_962 = 12787
+ER_IB_MSG_963 = 12788
+ER_IB_MSG_964 = 12789
+ER_IB_MSG_965 = 12790
+ER_IB_MSG_966 = 12791
+ER_IB_MSG_967 = 12792
+ER_IB_MSG_968 = 12793
+ER_IB_MSG_969 = 12794
+ER_IB_MSG_970 = 12795
+ER_IB_MSG_971 = 12796
+ER_IB_MSG_972 = 12797
+ER_IB_MSG_973 = 12798
+ER_IB_MSG_974 = 12799
+ER_IB_MSG_975 = 12800
+ER_IB_MSG_976 = 12801
+ER_IB_MSG_977 = 12802
+ER_IB_MSG_978 = 12803
+ER_IB_MSG_979 = 12804
+ER_IB_MSG_980 = 12805
+ER_IB_MSG_981 = 12806
+ER_IB_MSG_982 = 12807
+ER_IB_MSG_983 = 12808
+ER_IB_MSG_984 = 12809
+ER_IB_MSG_985 = 12810
+ER_IB_MSG_986 = 12811
+ER_IB_MSG_987 = 12812
+ER_IB_MSG_988 = 12813
+ER_IB_MSG_989 = 12814
+ER_IB_MSG_990 = 12815
+ER_IB_MSG_991 = 12816
+ER_IB_MSG_992 = 12817
+ER_IB_MSG_993 = 12818
+ER_IB_MSG_994 = 12819
+ER_IB_MSG_995 = 12820
+ER_IB_MSG_996 = 12821
+ER_IB_MSG_997 = 12822
+ER_IB_MSG_998 = 12823
+ER_IB_MSG_999 = 12824
+ER_IB_MSG_1000 = 12825
+ER_IB_MSG_1001 = 12826
+ER_IB_MSG_1002 = 12827
+ER_IB_MSG_1003 = 12828
+ER_IB_MSG_1004 = 12829
+ER_IB_MSG_1005 = 12830
+ER_IB_MSG_1006 = 12831
+ER_IB_MSG_1007 = 12832
+ER_IB_MSG_1008 = 12833
+ER_IB_MSG_1009 = 12834
+ER_IB_MSG_1010 = 12835
+ER_IB_MSG_1011 = 12836
+ER_IB_MSG_1012 = 12837
+ER_IB_MSG_1013 = 12838
+ER_IB_MSG_1014 = 12839
+ER_IB_MSG_1015 = 12840
+ER_IB_MSG_1016 = 12841
+ER_IB_MSG_1017 = 12842
+ER_IB_MSG_1018 = 12843
+ER_IB_MSG_1019 = 12844
+ER_IB_MSG_1020 = 12845
+ER_IB_MSG_1021 = 12846
+ER_IB_MSG_1022 = 12847
+ER_IB_MSG_1023 = 12848
+ER_IB_MSG_1024 = 12849
+ER_IB_MSG_1025 = 12850
+ER_IB_MSG_1026 = 12851
+ER_IB_MSG_1027 = 12852
+ER_IB_MSG_1028 = 12853
+ER_IB_MSG_1029 = 12854
+ER_IB_MSG_1030 = 12855
+ER_IB_MSG_1031 = 12856
+ER_IB_MSG_1032 = 12857
+ER_IB_MSG_1033 = 12858
+ER_IB_MSG_1034 = 12859
+ER_IB_MSG_1035 = 12860
+ER_IB_MSG_1036 = 12861
+ER_IB_MSG_1037 = 12862
+ER_IB_MSG_1038 = 12863
+ER_IB_MSG_1039 = 12864
+ER_IB_MSG_1040 = 12865
+ER_IB_MSG_1041 = 12866
+ER_IB_MSG_1042 = 12867
+ER_IB_MSG_1043 = 12868
+ER_IB_MSG_1044 = 12869
+ER_IB_MSG_1045 = 12870
+ER_IB_MSG_1046 = 12871
+ER_IB_MSG_1047 = 12872
+ER_IB_MSG_1048 = 12873
+ER_IB_MSG_1049 = 12874
+ER_IB_MSG_1050 = 12875
+ER_IB_MSG_1051 = 12876
+ER_IB_MSG_1052 = 12877
+ER_IB_MSG_1053 = 12878
+ER_IB_MSG_1054 = 12879
+ER_IB_MSG_1055 = 12880
+ER_IB_MSG_1056 = 12881
+ER_IB_MSG_1057 = 12882
+ER_IB_MSG_1058 = 12883
+ER_IB_MSG_1059 = 12884
+ER_IB_MSG_1060 = 12885
+ER_IB_MSG_1061 = 12886
+ER_IB_MSG_1062 = 12887
+ER_IB_MSG_1063 = 12888
+ER_IB_MSG_1064 = 12889
+ER_IB_MSG_1065 = 12890
+ER_IB_MSG_1066 = 12891
+ER_IB_MSG_1067 = 12892
+ER_IB_MSG_1068 = 12893
+ER_IB_MSG_1069 = 12894
+ER_IB_MSG_1070 = 12895
+ER_IB_MSG_1071 = 12896
+ER_IB_MSG_1072 = 12897
+ER_IB_MSG_1073 = 12898
+ER_IB_MSG_1074 = 12899
+ER_IB_MSG_1075 = 12900
+ER_IB_MSG_1076 = 12901
+ER_IB_MSG_1077 = 12902
+ER_IB_MSG_1078 = 12903
+ER_IB_MSG_1079 = 12904
+ER_IB_MSG_1080 = 12905
+ER_IB_MSG_1081 = 12906
+ER_IB_MSG_1082 = 12907
+ER_IB_MSG_1083 = 12908
+ER_IB_MSG_1084 = 12909
+ER_IB_MSG_1085 = 12910
+ER_IB_MSG_1086 = 12911
+ER_IB_MSG_1087 = 12912
+ER_IB_MSG_1088 = 12913
+ER_IB_MSG_1089 = 12914
+ER_IB_MSG_1090 = 12915
+ER_IB_MSG_1091 = 12916
+ER_IB_MSG_1092 = 12917
+ER_IB_MSG_1093 = 12918
+ER_IB_MSG_1094 = 12919
+ER_IB_MSG_1095 = 12920
+ER_IB_MSG_1096 = 12921
+ER_IB_MSG_1097 = 12922
+ER_IB_MSG_1098 = 12923
+ER_IB_MSG_1099 = 12924
+ER_IB_MSG_1100 = 12925
+ER_IB_MSG_1101 = 12926
+ER_IB_MSG_1102 = 12927
+ER_IB_MSG_1103 = 12928
+ER_IB_MSG_1104 = 12929
+ER_IB_MSG_1105 = 12930
+ER_IB_MSG_1106 = 12931
+ER_IB_MSG_1107 = 12932
+ER_IB_MSG_1108 = 12933
+ER_IB_MSG_1109 = 12934
+ER_IB_MSG_1110 = 12935
+ER_IB_MSG_1111 = 12936
+ER_IB_MSG_1112 = 12937
+ER_IB_MSG_1113 = 12938
+ER_IB_MSG_1114 = 12939
+ER_IB_MSG_1115 = 12940
+ER_IB_MSG_1116 = 12941
+ER_IB_MSG_1117 = 12942
+ER_IB_MSG_1118 = 12943
+ER_IB_MSG_1119 = 12944
+ER_IB_MSG_1120 = 12945
+ER_IB_MSG_1121 = 12946
+ER_IB_MSG_1122 = 12947
+ER_IB_MSG_1123 = 12948
+ER_IB_MSG_1124 = 12949
+ER_IB_MSG_1125 = 12950
+ER_IB_MSG_1126 = 12951
+ER_IB_MSG_1127 = 12952
+ER_IB_MSG_1128 = 12953
+ER_IB_MSG_1129 = 12954
+ER_IB_MSG_1130 = 12955
+ER_IB_MSG_1131 = 12956
+ER_IB_MSG_1132 = 12957
+ER_IB_MSG_1133 = 12958
+ER_IB_MSG_1134 = 12959
+ER_IB_MSG_1135 = 12960
+ER_IB_MSG_1136 = 12961
+ER_IB_MSG_1137 = 12962
+ER_IB_MSG_1138 = 12963
+ER_IB_MSG_1139 = 12964
+ER_IB_MSG_1140 = 12965
+ER_IB_MSG_1141 = 12966
+ER_IB_MSG_1142 = 12967
+ER_IB_MSG_1143 = 12968
+ER_IB_MSG_1144 = 12969
+ER_IB_MSG_1145 = 12970
+ER_IB_MSG_1146 = 12971
+ER_IB_MSG_1147 = 12972
+ER_IB_MSG_1148 = 12973
+ER_IB_MSG_1149 = 12974
+ER_IB_MSG_1150 = 12975
+ER_IB_MSG_1151 = 12976
+ER_IB_MSG_1152 = 12977
+ER_IB_MSG_1153 = 12978
+ER_IB_MSG_1154 = 12979
+ER_IB_MSG_1155 = 12980
+ER_IB_MSG_1156 = 12981
+ER_IB_MSG_1157 = 12982
+ER_IB_MSG_1158 = 12983
+ER_IB_MSG_1159 = 12984
+ER_IB_MSG_1160 = 12985
+ER_IB_MSG_1161 = 12986
+ER_IB_MSG_1162 = 12987
+ER_IB_MSG_1163 = 12988
+ER_IB_MSG_1164 = 12989
+ER_IB_MSG_1165 = 12990
+ER_IB_MSG_1166 = 12991
+ER_IB_MSG_1167 = 12992
+ER_IB_MSG_1168 = 12993
+ER_IB_MSG_1169 = 12994
+ER_IB_MSG_1170 = 12995
+ER_IB_MSG_1171 = 12996
+ER_IB_MSG_1172 = 12997
+ER_IB_MSG_1173 = 12998
+ER_IB_MSG_1174 = 12999
+ER_IB_MSG_1175 = 13000
+ER_IB_MSG_1176 = 13001
+ER_IB_MSG_1177 = 13002
+ER_IB_MSG_1178 = 13003
+ER_IB_MSG_1179 = 13004
+ER_IB_MSG_1180 = 13005
+ER_IB_MSG_1181 = 13006
+ER_IB_MSG_1182 = 13007
+ER_IB_MSG_1183 = 13008
+ER_IB_MSG_1184 = 13009
+ER_IB_MSG_1185 = 13010
+ER_IB_MSG_1186 = 13011
+ER_IB_MSG_1187 = 13012
+ER_IB_MSG_1188 = 13013
+ER_IB_MSG_1189 = 13014
+ER_IB_MSG_1190 = 13015
+ER_IB_MSG_1191 = 13016
+ER_IB_MSG_1192 = 13017
+ER_IB_MSG_1193 = 13018
+ER_IB_MSG_1194 = 13019
+ER_IB_MSG_1195 = 13020
+ER_IB_MSG_1196 = 13021
+ER_IB_MSG_1197 = 13022
+ER_IB_MSG_1198 = 13023
+ER_IB_MSG_1199 = 13024
+ER_IB_MSG_1200 = 13025
+ER_IB_MSG_1201 = 13026
+ER_IB_MSG_1202 = 13027
+ER_IB_MSG_1203 = 13028
+ER_IB_MSG_1204 = 13029
+ER_IB_MSG_1205 = 13030
+ER_IB_MSG_1206 = 13031
+ER_IB_MSG_1207 = 13032
+ER_IB_MSG_1208 = 13033
+ER_IB_MSG_1209 = 13034
+ER_IB_MSG_1210 = 13035
+ER_IB_MSG_1211 = 13036
+ER_IB_MSG_1212 = 13037
+ER_IB_MSG_1213 = 13038
+ER_IB_MSG_1214 = 13039
+ER_IB_MSG_1215 = 13040
+ER_IB_MSG_1216 = 13041
+ER_IB_MSG_1217 = 13042
+ER_IB_MSG_1218 = 13043
+ER_IB_MSG_1219 = 13044
+ER_IB_MSG_1220 = 13045
+ER_IB_MSG_1221 = 13046
+ER_IB_MSG_1222 = 13047
+ER_IB_MSG_1223 = 13048
+ER_IB_MSG_1224 = 13049
+ER_IB_MSG_1225 = 13050
+ER_IB_MSG_1226 = 13051
+ER_IB_MSG_1227 = 13052
+ER_IB_MSG_1228 = 13053
+ER_IB_MSG_1229 = 13054
+ER_IB_MSG_1230 = 13055
+ER_IB_MSG_1231 = 13056
+ER_IB_MSG_1232 = 13057
+ER_IB_MSG_1233 = 13058
+ER_IB_MSG_1234 = 13059
+ER_IB_MSG_1235 = 13060
+ER_IB_MSG_1236 = 13061
+ER_IB_MSG_1237 = 13062
+ER_IB_MSG_1238 = 13063
+ER_IB_MSG_1239 = 13064
+ER_IB_MSG_1240 = 13065
+ER_IB_MSG_1241 = 13066
+ER_IB_MSG_1242 = 13067
+ER_IB_MSG_1243 = 13068
+ER_IB_MSG_1244 = 13069
+ER_IB_MSG_1245 = 13070
+ER_IB_MSG_1246 = 13071
+ER_IB_MSG_1247 = 13072
+ER_IB_MSG_1248 = 13073
+ER_IB_MSG_1249 = 13074
+ER_IB_MSG_1250 = 13075
+ER_IB_MSG_1251 = 13076
+ER_IB_MSG_1252 = 13077
+ER_IB_MSG_1253 = 13078
+ER_IB_MSG_1254 = 13079
+ER_IB_MSG_1255 = 13080
+ER_IB_MSG_1256 = 13081
+ER_IB_MSG_1257 = 13082
+ER_IB_MSG_1258 = 13083
+ER_IB_MSG_1259 = 13084
+ER_IB_MSG_1260 = 13085
+ER_IB_MSG_1261 = 13086
+ER_IB_MSG_1262 = 13087
+ER_IB_MSG_1263 = 13088
+ER_IB_MSG_1264 = 13089
+ER_IB_MSG_1265 = 13090
+ER_IB_MSG_1266 = 13091
+ER_IB_MSG_1267 = 13092
+ER_IB_MSG_1268 = 13093
+ER_IB_MSG_1269 = 13094
+ER_IB_MSG_1270 = 13095
+ER_RPL_SLAVE_SQL_THREAD_STOP_CMD_EXEC_TIMEOUT = 13096
+ER_RPL_SLAVE_IO_THREAD_STOP_CMD_EXEC_TIMEOUT = 13097
+ER_RPL_GTID_UNSAFE_STMT_ON_NON_TRANS_TABLE = 13098
+ER_RPL_GTID_UNSAFE_STMT_CREATE_SELECT = 13099
+ER_RPL_GTID_UNSAFE_STMT_ON_TEMPORARY_TABLE = 13100
+ER_BINLOG_ROW_VALUE_OPTION_IGNORED = 13101
+ER_BINLOG_USE_V1_ROW_EVENTS_IGNORED = 13102
+ER_BINLOG_ROW_VALUE_OPTION_USED_ONLY_FOR_AFTER_IMAGES = 13103
+ER_CONNECTION_ABORTED = 13104
+ER_NORMAL_SERVER_SHUTDOWN = 13105
+ER_KEYRING_MIGRATE_FAILED = 13106
+ER_GRP_RPL_LOWER_CASE_TABLE_NAMES_DIFF_FROM_GRP = 13107
+ER_OOM_SAVE_GTIDS = 13108
+ER_LCTN_NOT_FOUND = 13109
+ER_REGEXP_INVALID_CAPTURE_GROUP_NAME = 13110
+ER_COMPONENT_FILTER_WRONG_VALUE = 13111
+ER_XPLUGIN_FAILED_TO_STOP_SERVICES = 13112
+ER_INCONSISTENT_ERROR = 13113
+ER_SERVER_MASTER_FATAL_ERROR_READING_BINLOG = 13114
+ER_NETWORK_READ_EVENT_CHECKSUM_FAILURE = 13115
+ER_SLAVE_CREATE_EVENT_FAILURE = 13116
+ER_SLAVE_FATAL_ERROR = 13117
+ER_SLAVE_HEARTBEAT_FAILURE = 13118
+ER_SLAVE_INCIDENT = 13119
+ER_SLAVE_MASTER_COM_FAILURE = 13120
+ER_SLAVE_RELAY_LOG_READ_FAILURE = 13121
+ER_SLAVE_RELAY_LOG_WRITE_FAILURE = 13122
+ER_SERVER_SLAVE_MI_INIT_REPOSITORY = 13123
+ER_SERVER_SLAVE_RLI_INIT_REPOSITORY = 13124
+ER_SERVER_NET_PACKET_TOO_LARGE = 13125
+ER_SERVER_NO_SYSTEM_TABLE_ACCESS = 13126
+ER_SERVER_UNKNOWN_ERROR = 13127
+ER_SERVER_UNKNOWN_SYSTEM_VARIABLE = 13128
+ER_SERVER_NO_SESSION_TO_SEND_TO = 13129
+ER_SERVER_NEW_ABORTING_CONNECTION = 13130
+ER_SERVER_OUT_OF_SORTMEMORY = 13131
+ER_SERVER_RECORD_FILE_FULL = 13132
+ER_SERVER_DISK_FULL_NOWAIT = 13133
+ER_SERVER_HANDLER_ERROR = 13134
+ER_SERVER_NOT_FORM_FILE = 13135
+ER_SERVER_CANT_OPEN_FILE = 13136
+ER_SERVER_FILE_NOT_FOUND = 13137
+ER_SERVER_FILE_USED = 13138
+ER_SERVER_CANNOT_LOAD_FROM_TABLE_V2 = 13139
+ER_ERROR_INFO_FROM_DA = 13140
+ER_SERVER_TABLE_CHECK_FAILED = 13141
+ER_SERVER_COL_COUNT_DOESNT_MATCH_PLEASE_UPDATE_V2 = 13142
+ER_SERVER_COL_COUNT_DOESNT_MATCH_CORRUPTED_V2 = 13143
+ER_SERVER_ACL_TABLE_ERROR = 13144
+ER_SERVER_SLAVE_INIT_QUERY_FAILED = 13145
+ER_SERVER_SLAVE_CONVERSION_FAILED = 13146
+ER_SERVER_SLAVE_IGNORED_TABLE = 13147
+ER_CANT_REPLICATE_ANONYMOUS_WITH_AUTO_POSITION = 13148
+ER_CANT_REPLICATE_ANONYMOUS_WITH_GTID_MODE_ON = 13149
+ER_CANT_REPLICATE_GTID_WITH_GTID_MODE_OFF = 13150
+ER_SERVER_TEST_MESSAGE = 13151
+ER_AUDIT_LOG_JSON_FILTER_PARSING_ERROR = 13152
+ER_AUDIT_LOG_JSON_FILTERING_NOT_ENABLED = 13153
+ER_PLUGIN_FAILED_TO_OPEN_TABLES = 13154
+ER_PLUGIN_FAILED_TO_OPEN_TABLE = 13155
+ER_AUDIT_LOG_JSON_FILTER_NAME_CANNOT_BE_EMPTY = 13156
+ER_AUDIT_LOG_USER_NAME_INVALID_CHARACTER = 13157
+ER_AUDIT_LOG_UDF_INSUFFICIENT_PRIVILEGE = 13158
+ER_AUDIT_LOG_NO_KEYRING_PLUGIN_INSTALLED = 13159
+ER_AUDIT_LOG_HOST_NAME_INVALID_CHARACTER = 13160
+ER_AUDIT_LOG_ENCRYPTION_PASSWORD_HAS_NOT_BEEN_SET = 13161
+ER_AUDIT_LOG_COULD_NOT_CREATE_AES_KEY = 13162
+ER_AUDIT_LOG_ENCRYPTION_PASSWORD_CANNOT_BE_FETCHED = 13163
+ER_COULD_NOT_REINITIALIZE_AUDIT_LOG_FILTERS = 13164
+ER_AUDIT_LOG_JSON_USER_NAME_CANNOT_BE_EMPTY = 13165
+ER_AUDIT_LOG_USER_FIRST_CHARACTER_MUST_BE_ALPHANUMERIC = 13166
+ER_AUDIT_LOG_JSON_FILTER_DOES_NOT_EXIST = 13167
+CR_UNKNOWN_ERROR = 2000
+CR_SOCKET_CREATE_ERROR = 2001
+CR_CONNECTION_ERROR = 2002
+CR_CONN_HOST_ERROR = 2003
+CR_IPSOCK_ERROR = 2004
+CR_UNKNOWN_HOST = 2005
+CR_SERVER_GONE_ERROR = 2006
+CR_VERSION_ERROR = 2007
+CR_OUT_OF_MEMORY = 2008
+CR_WRONG_HOST_INFO = 2009
+CR_LOCALHOST_CONNECTION = 2010
+CR_TCP_CONNECTION = 2011
+CR_SERVER_HANDSHAKE_ERR = 2012
+CR_SERVER_LOST = 2013
+CR_COMMANDS_OUT_OF_SYNC = 2014
+CR_NAMEDPIPE_CONNECTION = 2015
+CR_NAMEDPIPEWAIT_ERROR = 2016
+CR_NAMEDPIPEOPEN_ERROR = 2017
+CR_NAMEDPIPESETSTATE_ERROR = 2018
+CR_CANT_READ_CHARSET = 2019
+CR_NET_PACKET_TOO_LARGE = 2020
+CR_EMBEDDED_CONNECTION = 2021
+CR_PROBE_SLAVE_STATUS = 2022
+CR_PROBE_SLAVE_HOSTS = 2023
+CR_PROBE_SLAVE_CONNECT = 2024
+CR_PROBE_MASTER_CONNECT = 2025
+CR_SSL_CONNECTION_ERROR = 2026
+CR_MALFORMED_PACKET = 2027
+CR_WRONG_LICENSE = 2028
+CR_NULL_POINTER = 2029
+CR_NO_PREPARE_STMT = 2030
+CR_PARAMS_NOT_BOUND = 2031
+CR_DATA_TRUNCATED = 2032
+CR_NO_PARAMETERS_EXISTS = 2033
+CR_INVALID_PARAMETER_NO = 2034
+CR_INVALID_BUFFER_USE = 2035
+CR_UNSUPPORTED_PARAM_TYPE = 2036
+CR_SHARED_MEMORY_CONNECTION = 2037
+CR_SHARED_MEMORY_CONNECT_REQUEST_ERROR = 2038
+CR_SHARED_MEMORY_CONNECT_ANSWER_ERROR = 2039
+CR_SHARED_MEMORY_CONNECT_FILE_MAP_ERROR = 2040
+CR_SHARED_MEMORY_CONNECT_MAP_ERROR = 2041
+CR_SHARED_MEMORY_FILE_MAP_ERROR = 2042
+CR_SHARED_MEMORY_MAP_ERROR = 2043
+CR_SHARED_MEMORY_EVENT_ERROR = 2044
+CR_SHARED_MEMORY_CONNECT_ABANDONED_ERROR = 2045
+CR_SHARED_MEMORY_CONNECT_SET_ERROR = 2046
+CR_CONN_UNKNOW_PROTOCOL = 2047
+CR_INVALID_CONN_HANDLE = 2048
+CR_UNUSED_1 = 2049
+CR_FETCH_CANCELED = 2050
+CR_NO_DATA = 2051
+CR_NO_STMT_METADATA = 2052
+CR_NO_RESULT_SET = 2053
+CR_NOT_IMPLEMENTED = 2054
+CR_SERVER_LOST_EXTENDED = 2055
+CR_STMT_CLOSED = 2056
+CR_NEW_STMT_METADATA = 2057
+CR_ALREADY_CONNECTED = 2058
+CR_AUTH_PLUGIN_CANNOT_LOAD = 2059
+CR_DUPLICATE_CONNECTION_ATTR = 2060
+CR_AUTH_PLUGIN_ERR = 2061
+CR_INSECURE_API_ERR = 2062
+CR_FILE_NAME_TOO_LONG = 2063
+CR_SSL_FIPS_MODE_ERR = 2064
+# End MySQL Errors
+
+# Start X Plugin Errors
+ER_X_BAD_MESSAGE = 5000
+ER_X_CAPABILITIES_PREPARE_FAILED = 5001
+ER_X_CAPABILITY_NOT_FOUND = 5002
+ER_X_INVALID_PROTOCOL_DATA = 5003
+ER_X_BAD_CONNECTION_SESSION_ATTRIBUTE_VALUE_LENGTH = 5004
+ER_X_BAD_CONNECTION_SESSION_ATTRIBUTE_KEY_LENGTH = 5005
+ER_X_BAD_CONNECTION_SESSION_ATTRIBUTE_EMPTY_KEY = 5006
+ER_X_BAD_CONNECTION_SESSION_ATTRIBUTE_LENGTH = 5007
+ER_X_BAD_CONNECTION_SESSION_ATTRIBUTE_TYPE = 5008
+ER_X_CAPABILITY_SET_NOT_ALLOWED = 5009
+ER_X_SERVICE_ERROR = 5010
+ER_X_SESSION = 5011
+ER_X_INVALID_ARGUMENT = 5012
+ER_X_MISSING_ARGUMENT = 5013
+ER_X_BAD_INSERT_DATA = 5014
+ER_X_CMD_NUM_ARGUMENTS = 5015
+ER_X_CMD_ARGUMENT_TYPE = 5016
+ER_X_CMD_ARGUMENT_VALUE = 5017
+ER_X_BAD_UPSERT_DATA = 5018
+ER_X_DUPLICATED_CAPABILITIES = 5019
+ER_X_CMD_ARGUMENT_OBJECT_EMPTY = 5020
+ER_X_CMD_INVALID_ARGUMENT = 5021
+ER_X_BAD_UPDATE_DATA = 5050
+ER_X_BAD_TYPE_OF_UPDATE = 5051
+ER_X_BAD_COLUMN_TO_UPDATE = 5052
+ER_X_BAD_MEMBER_TO_UPDATE = 5053
+ER_X_BAD_STATEMENT_ID = 5110
+ER_X_BAD_CURSOR_ID = 5111
+ER_X_BAD_SCHEMA = 5112
+ER_X_BAD_TABLE = 5113
+ER_X_BAD_PROJECTION = 5114
+ER_X_DOC_ID_MISSING = 5115
+ER_X_DOC_ID_DUPLICATE = 5116
+ER_X_DOC_REQUIRED_FIELD_MISSING = 5117
+ER_X_PROJ_BAD_KEY_NAME = 5120
+ER_X_BAD_DOC_PATH = 5121
+ER_X_CURSOR_EXISTS = 5122
+ER_X_CURSOR_REACHED_EOF = 5123
+ER_X_PREPARED_STATMENT_CAN_HAVE_ONE_CURSOR = 5131
+ER_X_PREPARED_EXECUTE_ARGUMENT_NOT_SUPPORTED = 5133
+ER_X_PREPARED_EXECUTE_ARGUMENT_CONSISTENCY = 5134
+ER_X_EXPR_BAD_OPERATOR = 5150
+ER_X_EXPR_BAD_NUM_ARGS = 5151
+ER_X_EXPR_MISSING_ARG = 5152
+ER_X_EXPR_BAD_TYPE_VALUE = 5153
+ER_X_EXPR_BAD_VALUE = 5154
+ER_X_INVALID_COLLECTION = 5156
+ER_X_INVALID_ADMIN_COMMAND = 5157
+ER_X_EXPECT_NOT_OPEN = 5158
+ER_X_EXPECT_NO_ERROR_FAILED = 5159
+ER_X_EXPECT_BAD_CONDITION = 5160
+ER_X_EXPECT_BAD_CONDITION_VALUE = 5161
+ER_X_INVALID_NAMESPACE = 5162
+ER_X_BAD_NOTICE = 5163
+ER_X_CANNOT_DISABLE_NOTICE = 5164
+ER_X_BAD_CONFIGURATION = 5165
+ER_X_MYSQLX_ACCOUNT_MISSING_PERMISSIONS = 5167
+ER_X_EXPECT_FIELD_EXISTS_FAILED = 5168
+ER_X_BAD_LOCKING = 5169
+ER_X_FRAME_COMPRESSION_DISABLED = 5170
+ER_X_DECOMPRESSION_FAILED = 5171
+ER_X_BAD_COMPRESSED_FRAME = 5174
+ER_X_CAPABILITY_COMPRESSION_INVALID_ALGORITHM = 5175
+ER_X_CAPABILITY_COMPRESSION_INVALID_SERVER_STYLE = 5176
+ER_X_CAPABILITY_COMPRESSION_INVALID_CLIENT_STYLE = 5177
+ER_X_CAPABILITY_COMPRESSION_INVALID_OPTION = 5178
+ER_X_CAPABILITY_COMPRESSION_MISSING_REQUIRED_FIELDS = 5179
+ER_X_DOCUMENT_DOESNT_MATCH_EXPECTED_SCHEMA = 5180
+ER_X_COLLECTION_OPTION_DOESNT_EXISTS = 5181
+ER_X_INVALID_VALIDATION_SCHEMA = 5182
+# End X Plugin Errors
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/errors.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/errors.py
new file mode 100644
index 0000000..e2534d5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/errors.py
@@ -0,0 +1,284 @@
+# Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementation of the Python Database API Specification v2.0 exceptions."""
+
+import sys
+import struct
+
+from .locales import get_client_error
+
+PY2 = sys.version_info[0] == 2
+
+if PY2:
+    # pylint: disable=E0602
+    def struct_unpack(fmt, buf):
+        """Wrapper around struct.unpack handling buffer as bytes and strings.
+        """
+        if isinstance(buf, (bytearray, bytes)):
+            return struct.unpack_from(fmt, buffer(buf))
+        return struct.unpack_from(fmt, buf)
+    # pylint: enable=E0602
+else:
+    from struct import unpack as struct_unpack
+
+
+class Error(Exception):
+    """Exception that is base class for all other error exceptions."""
+    def __init__(self, msg=None, errno=None, values=None, sqlstate=None):
+        super(Error, self).__init__()
+        self.msg = msg
+        self._full_msg = self.msg
+        self.errno = errno or -1
+        self.sqlstate = sqlstate
+
+        if not self.msg and (2000 <= self.errno < 3000):
+            self.msg = get_client_error(self.errno)
+            if values is not None:
+                try:
+                    self.msg = self.msg % values
+                except TypeError as err:
+                    self.msg = "{0} (Warning: {1})".format(self.msg, str(err))
+        elif not self.msg:
+            self._full_msg = self.msg = "Unknown error"
+
+        if self.msg and self.errno != -1:
+            fields = {
+                "errno": self.errno,
+                "msg": self.msg.encode("utf8") if PY2 else self.msg
+            }
+            if self.sqlstate:
+                fmt = "{errno} ({state}): {msg}"
+                fields["state"] = self.sqlstate
+            else:
+                fmt = "{errno}: {msg}"
+            self._full_msg = fmt.format(**fields)
+
+        self.args = (self.errno, self._full_msg, self.sqlstate)
+
+    def __str__(self):
+        return self._full_msg
+
+
+class InterfaceError(Error):
+    """Exception for errors related to the interface."""
+    pass
+
+
+class DatabaseError(Error):
+    """Exception for errors related to the database."""
+    pass
+
+
+class InternalError(DatabaseError):
+    """Exception for errors internal database errors."""
+    pass
+
+
+class OperationalError(DatabaseError):
+    """Exception for errors related to the database's operation."""
+    pass
+
+
+class ProgrammingError(DatabaseError):
+    """Exception for errors programming errors."""
+    pass
+
+
+class IntegrityError(DatabaseError):
+    """Exception for errors regarding relational integrity."""
+    pass
+
+
+class DataError(DatabaseError):
+    """Exception for errors reporting problems with processed data."""
+    pass
+
+
+class NotSupportedError(DatabaseError):
+    """Exception for errors when an unsupported database feature was used."""
+    pass
+
+
+class PoolError(Error):
+    """Exception for errors relating to connection pooling."""
+    pass
+
+# pylint: disable=W0622
+class TimeoutError(Error):
+    """Exception for errors relating to connection timeout."""
+    pass
+
+
+def intread(buf):
+    """Unpacks the given buffer to an integer."""
+    try:
+        if isinstance(buf, int):
+            return buf
+        length = len(buf)
+        if length == 1:
+            return buf[0]
+        elif length <= 4:
+            tmp = buf + b"\x00" * (4 - length)
+            return struct_unpack("<I", tmp)[0]
+        tmp = buf + b"\x00" * (8 - length)
+        return struct_unpack("<Q", tmp)[0]
+    except:
+        raise
+
+
+def read_int(buf, size):
+    """Read an integer from buffer.
+
+    Returns a tuple (truncated buffer, int).
+    """
+
+    try:
+        res = intread(buf[0:size])
+    except:
+        raise
+
+    return (buf[size:], res)
+
+
+def read_bytes(buf, size):
+    """Reads bytes from a buffer.
+
+    Returns a tuple with buffer less the read bytes, and the bytes.
+    """
+    res = buf[0:size]
+    return (buf[size:], res)
+
+
+def get_mysql_exception(errno, msg=None, sqlstate=None):
+    """Get the exception matching the MySQL error.
+
+    This function will return an exception based on the SQLState. The given
+    message will be passed on in the returned exception.
+
+    Returns an Exception.
+    """
+    try:
+        return _ERROR_EXCEPTIONS[errno](msg=msg, errno=errno,
+                                        sqlstate=sqlstate)
+    except KeyError:
+        # Error was not mapped to particular exception
+        pass
+
+    if not sqlstate:
+        return DatabaseError(msg=msg, errno=errno)
+
+    try:
+        return _SQLSTATE_CLASS_EXCEPTION[sqlstate[0:2]](msg=msg, errno=errno,
+                                                        sqlstate=sqlstate)
+    except KeyError:
+        # Return default InterfaceError
+        return DatabaseError(msg=msg, errno=errno, sqlstate=sqlstate)
+
+
+def get_exception(packet):
+    """Returns an exception object based on the MySQL error.
+
+    Returns an exception object based on the MySQL error in the given
+    packet.
+
+    Returns an Error-Object.
+    """
+    errno = errmsg = None
+
+    try:
+        if packet[4] != 255:
+            raise ValueError("Packet is not an error packet")
+    except IndexError as err:
+        return InterfaceError("Failed getting Error information ({0})"
+                              "".format(err))
+
+    sqlstate = None
+    try:
+        packet = packet[5:]
+        packet, errno = read_int(packet, 2)
+        if packet[0] != 35:
+            # Error without SQLState
+            if isinstance(packet, (bytes, bytearray)):
+                errmsg = packet.decode("utf8")
+            else:
+                errmsg = packet
+        else:
+            packet, sqlstate = read_bytes(packet[1:], 5)
+            sqlstate = sqlstate.decode("utf8")
+            errmsg = packet.decode("utf8")
+    except Exception as err:  # pylint: disable=W0703
+        return InterfaceError("Failed getting Error information ({0})"
+                              "".format(err))
+    else:
+        return get_mysql_exception(errno, errmsg, sqlstate)
+
+
+_SQLSTATE_CLASS_EXCEPTION = {
+    "02": DataError,  # no data
+    "07": DatabaseError,  # dynamic SQL error
+    "08": OperationalError,  # connection exception
+    "0A": NotSupportedError,  # feature not supported
+    "21": DataError,  # cardinality violation
+    "22": DataError,  # data exception
+    "23": IntegrityError,  # integrity constraint violation
+    "24": ProgrammingError,  # invalid cursor state
+    "25": ProgrammingError,  # invalid transaction state
+    "26": ProgrammingError,  # invalid SQL statement name
+    "27": ProgrammingError,  # triggered data change violation
+    "28": ProgrammingError,  # invalid authorization specification
+    "2A": ProgrammingError,  # direct SQL syntax error or access rule violation
+    "2B": DatabaseError,  # dependent privilege descriptors still exist
+    "2C": ProgrammingError,  # invalid character set name
+    "2D": DatabaseError,  # invalid transaction termination
+    "2E": DatabaseError,  # invalid connection name
+    "33": DatabaseError,  # invalid SQL descriptor name
+    "34": ProgrammingError,  # invalid cursor name
+    "35": ProgrammingError,  # invalid condition number
+    "37": ProgrammingError,  # dynamic SQL syntax error or access rule violation
+    "3C": ProgrammingError,  # ambiguous cursor name
+    "3D": ProgrammingError,  # invalid catalog name
+    "3F": ProgrammingError,  # invalid schema name
+    "40": InternalError,  # transaction rollback
+    "42": ProgrammingError,  # syntax error or access rule violation
+    "44": InternalError,   # with check option violation
+    "HZ": OperationalError,  # remote database access
+    "XA": IntegrityError,
+    "0K": OperationalError,
+    "HY": DatabaseError,  # default when no SQLState provided by MySQL server
+}
+
+_ERROR_EXCEPTIONS = {
+    1243: ProgrammingError,
+    1210: ProgrammingError,
+    2002: InterfaceError,
+    2013: OperationalError,
+    2049: NotSupportedError,
+    2055: OperationalError,
+    2061: InterfaceError,
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/expr.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/expr.py
new file mode 100644
index 0000000..4348bd9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/expr.py
@@ -0,0 +1,1279 @@
+# Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Expression Parser."""
+
+from .compat import STRING_TYPES, BYTE_TYPES, UNICODE_TYPES
+from .helpers import get_item_or_attr
+from .dbdoc import DbDoc
+from .protobuf import Message, mysqlxpb_enum
+
+
+# pylint: disable=C0103,C0111
+class TokenType(object):
+    NOT = 1
+    AND = 2
+    OR = 3
+    XOR = 4
+    IS = 5
+    LPAREN = 6
+    RPAREN = 7
+    LSQBRACKET = 8
+    RSQBRACKET = 9
+    BETWEEN = 10
+    TRUE = 11
+    NULL = 12
+    FALSE = 13
+    IN = 14
+    LIKE = 15
+    INTERVAL = 16
+    REGEXP = 17
+    ESCAPE = 18
+    IDENT = 19
+    LSTRING = 20
+    LNUM = 21
+    DOT = 22
+    DOLLAR = 23
+    COMMA = 24
+    EQ = 25
+    NE = 26
+    GT = 27
+    GE = 28
+    LT = 29
+    LE = 30
+    BITAND = 31
+    BITOR = 32
+    BITXOR = 33
+    LSHIFT = 34
+    RSHIFT = 35
+    PLUS = 36
+    MINUS = 37
+    MUL = 38
+    DIV = 39
+    HEX = 40
+    BIN = 41
+    NEG = 42
+    BANG = 43
+    MICROSECOND = 44
+    SECOND = 45
+    MINUTE = 46
+    HOUR = 47
+    DAY = 48
+    WEEK = 49
+    MONTH = 50
+    QUARTER = 51
+    YEAR = 52
+    EROTEME = 53
+    DOUBLESTAR = 54
+    MOD = 55
+    COLON = 56
+    OROR = 57
+    ANDAND = 58
+    LCURLY = 59
+    RCURLY = 60
+    CAST = 61
+    DOTSTAR = 62
+    ORDERBY_ASC = 63
+    ORDERBY_DESC = 64
+    AS = 65
+    ARROW = 66
+    QUOTE = 67
+    BINARY = 68
+    DATETIME = 69
+    TIME = 70
+    CHAR = 71
+    DATE = 72
+    DECIMAL = 73
+    SIGNED = 74
+    INTEGER = 75
+    UNSIGNED = 76
+    JSON = 77
+    SECOND_MICROSECOND = 78
+    MINUTE_MICROSECOND = 79
+    MINUTE_SECOND = 80
+    HOUR_MICROSECOND = 81
+    HOUR_SECOND = 82
+    HOUR_MINUTE = 83
+    DAY_MICROSECOND = 84
+    DAY_SECOND = 85
+    DAY_MINUTE = 86
+    DAY_HOUR = 87
+    YEAR_MONTH = 88
+    OVERLAPS = 89
+# pylint: enable=C0103
+
+_INTERVAL_UNITS = set([
+    TokenType.MICROSECOND,
+    TokenType.SECOND,
+    TokenType.MINUTE,
+    TokenType.HOUR,
+    TokenType.DAY,
+    TokenType.WEEK,
+    TokenType.MONTH,
+    TokenType.QUARTER,
+    TokenType.YEAR,
+    TokenType.SECOND_MICROSECOND,
+    TokenType.MINUTE_MICROSECOND,
+    TokenType.MINUTE_SECOND,
+    TokenType.HOUR_MICROSECOND,
+    TokenType.HOUR_SECOND,
+    TokenType.HOUR_MINUTE,
+    TokenType.DAY_MICROSECOND,
+    TokenType.DAY_SECOND,
+    TokenType.DAY_MINUTE,
+    TokenType.DAY_HOUR,
+    TokenType.YEAR_MONTH])
+
+# map of reserved word to token type
+_RESERVED_WORDS = {
+    "and":      TokenType.AND,
+    "or":       TokenType.OR,
+    "xor":      TokenType.XOR,
+    "is":       TokenType.IS,
+    "not":      TokenType.NOT,
+    "like":     TokenType.LIKE,
+    "in":       TokenType.IN,
+    "overlaps": TokenType.OVERLAPS,
+    "regexp":   TokenType.REGEXP,
+    "between":  TokenType.BETWEEN,
+    "interval": TokenType.INTERVAL,
+    "escape":   TokenType.ESCAPE,
+    "cast":     TokenType.CAST,
+    "div":      TokenType.DIV,
+    "hex":      TokenType.HEX,
+    "bin":      TokenType.BIN,
+    "true":     TokenType.TRUE,
+    "false":    TokenType.FALSE,
+    "null":     TokenType.NULL,
+    "second":   TokenType.SECOND,
+    "minute":   TokenType.MINUTE,
+    "hour":     TokenType.HOUR,
+    "day":      TokenType.DAY,
+    "week":     TokenType.WEEK,
+    "month":    TokenType.MONTH,
+    "quarter":  TokenType.QUARTER,
+    "year":     TokenType.YEAR,
+    "microsecond": TokenType.MICROSECOND,
+    "asc":      TokenType.ORDERBY_ASC,
+    "desc":     TokenType.ORDERBY_DESC,
+    "as":       TokenType.AS,
+    "binary":   TokenType.BINARY,
+    "datetime": TokenType.DATETIME,
+    "time":     TokenType.TIME,
+    "char":     TokenType.CHAR,
+    "date":     TokenType.DATE,
+    "decimal":  TokenType.DECIMAL,
+    "signed":   TokenType.SIGNED,
+    "unsigned": TokenType.UNSIGNED,
+    "integer":  TokenType.INTEGER,
+    "json":     TokenType.JSON,
+    "second_microsecond": TokenType.SECOND_MICROSECOND,
+    "minute_microsecond": TokenType.MINUTE_MICROSECOND,
+    "minute_second": TokenType.MINUTE_SECOND,
+    "hour_microsecond": TokenType.HOUR_MICROSECOND,
+    "hour_second": TokenType.HOUR_SECOND,
+    "hour_minute": TokenType.HOUR_MINUTE,
+    "day_microsecond": TokenType.DAY_MICROSECOND,
+    "day_second": TokenType.DAY_SECOND,
+    "day_minute": TokenType.DAY_MINUTE,
+    "day_hour": TokenType.DAY_HOUR,
+    "year_month": TokenType.YEAR_MONTH
+}
+
+_SQL_FUNTION_RESERVED_WORDS_COLLISION = {
+    "binary": TokenType.BINARY,
+    "cast": TokenType.CAST,
+    "char": TokenType.CHAR,
+    "date": TokenType.DATE,
+    "decimal": TokenType.DECIMAL,
+    "signed": TokenType.SIGNED,
+    "time": TokenType.TIME,
+    "unsigned": TokenType.UNSIGNED,
+}
+
+_OPERATORS = {
+    "=": "==",
+    "==": "==",
+    "and": "&&",
+    "div": "div",
+    "||": "||",
+    "or": "||",
+    "not": "not",
+    "xor": "xor",
+    "^": "^",
+    "is": "is",
+    "between": "between",
+    "in": "in",
+    "like": "like",
+    "!=": "!=",
+    "<>": "!=",
+    ">": ">",
+    ">=": ">=",
+    "<": "<",
+    "<=": "<=",
+    "&": "&",
+    "&&": "&&",
+    "|": "|",
+    "<<": "<<",
+    ">>": ">>",
+    "+": "+",
+    "-": "-",
+    "*": "*",
+    "/": "/",
+    "~": "~",
+    "%": "%",
+    "cast": "cast",
+    "cont_in": "cont_in",
+    "overlaps": "overlaps"
+}
+
+_UNARY_OPERATORS = {
+    "+": "sign_plus",
+    "-": "sign_minus",
+    "~": "~",
+    "not": "not",
+    "!": "!"
+}
+
+_NEGATION = {
+    "is": "is_not",
+    "between": "not_between",
+    "regexp": "not_regexp",
+    "like": "not_like",
+    "in": "not_in",
+    "cont_in": "not_cont_in",
+    "overlaps": "not_overlaps",
+}
+
+
+class Token(object):
+    def __init__(self, token_type, value, length=1):
+        self.token_type = token_type
+        self.value = value
+        self.length = length
+
+    def __repr__(self):
+        return self.__str__()
+
+    def __str__(self):
+        if self.token_type == TokenType.IDENT or \
+           self.token_type == TokenType.LNUM or \
+           self.token_type == TokenType.LSTRING:
+            return "{0}({1})".format(self.token_type, self.value)
+        return "{0}".format(self.token_type)
+
+
+# static protobuf helper functions
+
+def build_expr(value):
+    msg = Message("Mysqlx.Expr.Expr")
+    if isinstance(value, (Message)):
+        return value
+    elif isinstance(value, (ExprParser)):
+        return value.expr(reparse=True)
+    elif isinstance(value, (dict, DbDoc)):
+        msg["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.OBJECT")
+        msg["object"] = build_object(value).get_message()
+    elif isinstance(value, (list, tuple)):
+        msg["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.ARRAY")
+        msg["array"] = build_array(value).get_message()
+    else:
+        msg["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.LITERAL")
+        msg["literal"] = build_scalar(value).get_message()
+    return msg
+
+
+def build_scalar(value):
+    if isinstance(value, STRING_TYPES):
+        return build_string_scalar(value)
+    elif isinstance(value, BYTE_TYPES):
+        return build_bytes_scalar(value)
+    elif isinstance(value, bool):
+        return build_bool_scalar(value)
+    elif isinstance(value, int):
+        return build_int_scalar(value)
+    elif isinstance(value, float):
+        return build_double_scalar(value)
+    elif value is None:
+        return build_null_scalar()
+    raise ValueError("Unsupported data type: {0}.".format(type(value)))
+
+
+def build_object(obj):
+    if isinstance(obj, DbDoc):
+        return build_object(obj.__dict__)
+
+    msg = Message("Mysqlx.Expr.Object")
+    for key, value in obj.items():
+        pair = Message("Mysqlx.Expr.Object.ObjectField")
+        pair["key"] = key.encode() if isinstance(key, UNICODE_TYPES) else key
+        pair["value"] = build_expr(value).get_message()
+        msg["fld"].extend([pair.get_message()])
+    return msg
+
+
+def build_array(array):
+    msg = Message("Mysqlx.Expr.Array")
+    msg["value"].extend([build_expr(value).get_message() for value in array])
+    return msg
+
+
+def build_null_scalar():
+    msg = Message("Mysqlx.Datatypes.Scalar")
+    msg["type"] = mysqlxpb_enum("Mysqlx.Datatypes.Scalar.Type.V_NULL")
+    return msg
+
+
+def build_double_scalar(value):
+    msg = Message("Mysqlx.Datatypes.Scalar")
+    msg["type"] = mysqlxpb_enum("Mysqlx.Datatypes.Scalar.Type.V_DOUBLE")
+    msg["v_double"] = value
+    return msg
+
+
+def build_int_scalar(value):
+    msg = Message("Mysqlx.Datatypes.Scalar")
+    msg["type"] = mysqlxpb_enum("Mysqlx.Datatypes.Scalar.Type.V_SINT")
+    msg["v_signed_int"] = value
+    return msg
+
+def build_unsigned_int_scalar(value):
+    msg = Message("Mysqlx.Datatypes.Scalar")
+    msg["type"] = mysqlxpb_enum("Mysqlx.Datatypes.Scalar.Type.V_UINT")
+    msg["v_unsigned_int"] = value
+    return msg
+
+def build_string_scalar(value):
+    if isinstance(value, STRING_TYPES):
+        value = bytes(bytearray(value, "utf-8"))
+    msg = Message("Mysqlx.Datatypes.Scalar")
+    msg["type"] = mysqlxpb_enum("Mysqlx.Datatypes.Scalar.Type.V_STRING")
+    msg["v_string"] = Message("Mysqlx.Datatypes.Scalar.String", value=value)
+    return msg
+
+
+def build_bool_scalar(value):
+    msg = Message("Mysqlx.Datatypes.Scalar")
+    msg["type"] = mysqlxpb_enum("Mysqlx.Datatypes.Scalar.Type.V_BOOL")
+    msg["v_bool"] = value
+    return msg
+
+
+def build_bytes_scalar(value):
+    msg = Message("Mysqlx.Datatypes.Scalar")
+    msg["type"] = mysqlxpb_enum("Mysqlx.Datatypes.Scalar.Type.V_OCTETS")
+    msg["v_octets"] = Message("Mysqlx.Datatypes.Scalar.Octets", value=value)
+    return msg
+
+
+def build_literal_expr(value):
+    msg = Message("Mysqlx.Expr.Expr")
+    msg["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.LITERAL")
+    msg["literal"] = value
+    return msg
+
+
+def build_unary_op(name, param):
+    operator = Message("Mysqlx.Expr.Operator")
+    operator["name"] = _UNARY_OPERATORS[name]
+    operator["param"] = [param.get_message()]
+    msg = Message("Mysqlx.Expr.Expr")
+    msg["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.OPERATOR")
+    msg["operator"] = operator.get_message()
+    return msg
+
+
+def escape_literal(string):
+    return string.replace('"', '""')
+
+
+class ExprParser(object):
+    def __init__(self, string, allow_relational=True):
+        self.string = string
+        self.tokens = []
+        self.path_name_queue = []
+        self.pos = 0
+        self._allow_relational_columns = allow_relational
+        self.placeholder_name_to_position = {}
+        self.positional_placeholder_count = 0
+        self.clean_expression()
+        self.lex()
+
+    def __str__(self):
+        return "<mysqlx.ExprParser '{}'>".format(self.string)
+
+    def clean_expression(self):
+        """Removes the keywords that does not form part of the expression.
+
+        Removes the keywords "SELECT" and "WHERE" that does not form part of
+        the expression itself.
+        """
+        if not isinstance(self.string, STRING_TYPES):
+            self.string = repr(self.string)
+        self.string = self.string.strip(" ")
+        if len(self.string) > 1 and self.string[-1] == ';':
+            self.string = self.string[:-1]
+        if "SELECT" in self.string[:6].upper():
+            self.string = self.string[6:]
+        if "WHERE" in self.string[:5].upper():
+            self.string = self.string[5:]
+
+    # convencience checker for lexer
+    def next_char_is(self, key, char):
+        return key + 1 < len(self.string) and self.string[key + 1] == char
+
+    def lex_number(self, pos):
+        # numeric literal
+        start = pos
+        found_dot = False
+        while pos < len(self.string) and (self.string[pos].isdigit() or
+                                          self.string[pos] == "."):
+            if self.string[pos] == ".":
+                if found_dot is True:
+                    raise ValueError("Invalid number. Found multiple '.'")
+                found_dot = True
+            # technically we allow more than one "." and let float()'s parsing
+            # complain later
+            pos += 1
+        val = self.string[start:pos]
+        return Token(TokenType.LNUM, val, len(val))
+
+    def lex_alpha(self, i, allow_space=False):
+        start = i
+        while i < len(self.string) and \
+              (self.string[i].isalnum() or self.string[i] == "_" or
+               (self.string[i].isspace() and allow_space)):
+            i += 1
+
+        val = self.string[start:i]
+        try:
+            if i < len(self.string) and self.string[i] == '(' and \
+               val.lower() not in _SQL_FUNTION_RESERVED_WORDS_COLLISION:
+                token = Token(TokenType.IDENT, val, len(val))
+            else:
+                token = Token(_RESERVED_WORDS[val.lower()], val.lower(), len(val))
+        except KeyError:
+            token = Token(TokenType.IDENT, val, len(val))
+        return token
+
+    def lex_quoted_token(self, key):
+        quote_char = self.string[key]
+        val = ""
+        key += 1
+        start = key
+        while key < len(self.string):
+            char = self.string[key]
+            if char == quote_char and key + 1 < len(self.string) and \
+               self.string[key + 1] != quote_char:
+                # break if we have a quote char that's not double
+                break
+            elif char == quote_char or char == "\\":
+                # this quote char has to be doubled
+                if key + 1 >= len(self.string):
+                    break
+                key += 1
+                val += self.string[key]
+            else:
+                val += char
+            key += 1
+        if key >= len(self.string) or self.string[key] != quote_char:
+            raise ValueError("Unterminated quoted string starting at {0}"
+                             "".format(start))
+        if quote_char == "`":
+            return Token(TokenType.IDENT, val, len(val) + 2)
+        return Token(TokenType.LSTRING, val, len(val) + 2)
+
+    def lex(self):
+        i = 0
+        arrow_last = False
+        inside_arrow = False
+        while i < len(self.string):
+            char = self.string[i]
+            if char.isspace():
+                i += 1
+                continue
+            elif char.isdigit():
+                token = self.lex_number(i)
+            elif char.isalpha() or char == "_":
+                token = self.lex_alpha(i, inside_arrow)
+            elif char == "?":
+                token = Token(TokenType.EROTEME, char)
+            elif char == ":":
+                token = Token(TokenType.COLON, char)
+            elif char == "{":
+                token = Token(TokenType.LCURLY, char)
+            elif char == "}":
+                token = Token(TokenType.RCURLY, char)
+            elif char == "+":
+                token = Token(TokenType.PLUS, char)
+            elif char == "-":
+                if self.next_char_is(i, ">") and not arrow_last:
+                    token = Token(TokenType.ARROW, "->", 2)
+                    arrow_last = True
+                else:
+                    token = Token(TokenType.MINUS, char)
+            elif char == "*":
+                if self.next_char_is(i, "*"):
+                    token = Token(TokenType.DOUBLESTAR, "**", 2)
+                else:
+                    token = Token(TokenType.MUL, char)
+            elif char == "/":
+                token = Token(TokenType.DIV, char)
+            elif char == "$":
+                token = Token(TokenType.DOLLAR, char)
+            elif char == "%":
+                token = Token(TokenType.MOD, char)
+            elif char == "=":
+                if self.next_char_is(i, "="):
+                    token = Token(TokenType.EQ, "==", 2)
+                else:
+                    token = Token(TokenType.EQ, "==", 1)
+            elif char == "&":
+                if self.next_char_is(i, "&"):
+                    token = Token(TokenType.ANDAND, "&&", 2)
+                else:
+                    token = Token(TokenType.BITAND, char)
+            elif char == "^":
+                token = Token(TokenType.BITXOR, char)
+            elif char == "|":
+                if self.next_char_is(i, "|"):
+                    token = Token(TokenType.OROR, "||", 2)
+                else:
+                    token = Token(TokenType.BITOR, char)
+            elif char == "(":
+                token = Token(TokenType.LPAREN, char)
+            elif char == ")":
+                token = Token(TokenType.RPAREN, char)
+            elif char == "[":
+                token = Token(TokenType.LSQBRACKET, char)
+            elif char == "]":
+                token = Token(TokenType.RSQBRACKET, char)
+            elif char == "~":
+                token = Token(TokenType.NEG, char)
+            elif char == ",":
+                token = Token(TokenType.COMMA, char)
+            elif char == "!":
+                if self.next_char_is(i, "="):
+                    token = Token(TokenType.NE, "!=", 2)
+                else:
+                    token = Token(TokenType.BANG, char)
+            elif char == "<":
+                if self.next_char_is(i, ">"):
+                    token = Token(TokenType.NE, "<>", 2)
+                elif self.next_char_is(i, "<"):
+                    token = Token(TokenType.LSHIFT, "<<", 2)
+                elif self.next_char_is(i, "="):
+                    token = Token(TokenType.LE, "<=", 2)
+                else:
+                    token = Token(TokenType.LT, char)
+            elif char == ">":
+                if self.next_char_is(i, ">"):
+                    token = Token(TokenType.RSHIFT, ">>", 2)
+                elif self.next_char_is(i, "="):
+                    token = Token(TokenType.GE, ">=", 2)
+                else:
+                    token = Token(TokenType.GT, char)
+            elif char == ".":
+                if self.next_char_is(i, "*"):
+                    token = Token(TokenType.DOTSTAR, ".*", 2)
+                elif i + 1 < len(self.string) and self.string[i + 1].isdigit():
+                    token = self.lex_number(i)
+                else:
+                    token = Token(TokenType.DOT, char)
+            elif (char == "'" or char == '"') and arrow_last:
+                token = Token(TokenType.QUOTE, char)
+                if not inside_arrow:
+                    inside_arrow = True
+                else:
+                    arrow_last = False
+                    inside_arrow = False
+            elif char == '"' or char == "'" or char == "`":
+                token = self.lex_quoted_token(i)
+            else:
+                raise ValueError("Unknown character at {0}".format(i))
+            self.tokens.append(token)
+            i += token.length
+
+    def assert_cur_token(self, token_type):
+        if self.pos >= len(self.tokens):
+            raise ValueError("Expected token type {0} at pos {1} but no "
+                             "tokens left".format(token_type, self.pos))
+        if self.tokens[self.pos].token_type != token_type:
+            raise ValueError("Expected token type {0} at pos {1} but found "
+                             "type {2}, on tokens {3}"
+                             "".format(token_type, self.pos,
+                                       self.tokens[self.pos], self.tokens))
+
+    def cur_token_type_is(self, token_type):
+        return self.pos_token_type_is(self.pos, token_type)
+
+    def cur_token_type_in(self, *types):
+        return self.pos < len(self.tokens) and \
+               self.tokens[self.pos].token_type in types
+
+    def next_token_type_is(self, token_type):
+        return self.pos_token_type_is(self.pos + 1, token_type)
+
+    def next_token_type_in(self, *types):
+        return self.pos < len(self.tokens) and \
+               self.tokens[self.pos + 1].token_type in types
+
+    def pos_token_type_is(self, pos, token_type):
+        return pos < len(self.tokens) and \
+            self.tokens[pos].token_type == token_type
+
+    def consume_token(self, token_type):
+        self.assert_cur_token(token_type)
+        value = self.tokens[self.pos].value
+        self.pos += 1
+        return value
+
+    def paren_expr_list(self):
+        """Parse a paren-bounded expression list for function arguments or IN
+        list and return a list of Expr objects.
+        """
+        exprs = []
+        path_name_added = False
+        self.consume_token(TokenType.LPAREN)
+        if not self.cur_token_type_is(TokenType.RPAREN):
+            msg_expr = self._expr().get_message()
+            if hasattr(msg_expr, "identifier") and msg_expr.identifier.name:
+                self.path_name_queue.insert(0, msg_expr.identifier.name)
+                path_name_added = True
+            elif not hasattr(msg_expr, "identifier") and \
+               "identifier" in msg_expr and "name" in msg_expr["identifier"]:
+                self.path_name_queue.insert(0, msg_expr["identifier"]["name"])
+                path_name_added = True
+            exprs.append(msg_expr)
+            while self.cur_token_type_is(TokenType.COMMA):
+                self.pos += 1
+                exprs.append(self._expr().get_message())
+        self.consume_token(TokenType.RPAREN)
+        if path_name_added:
+            self.path_name_queue.pop()
+        return exprs
+
+    def identifier(self):
+        self.assert_cur_token(TokenType.IDENT)
+        ident = Message("Mysqlx.Expr.Identifier")
+        if self.next_token_type_is(TokenType.DOT):
+            ident["schema_name"] = self.consume_token(TokenType.IDENT)
+            self.consume_token(TokenType.DOT)
+        ident["name"] = self.tokens[self.pos].value
+        self.pos += 1
+        return ident
+
+    def function_call(self):
+        function_call = Message("Mysqlx.Expr.FunctionCall")
+        function_call["name"] = self.identifier()
+        function_call["param"] = self.paren_expr_list()
+        msg_expr = Message("Mysqlx.Expr.Expr")
+        msg_expr["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.FUNC_CALL")
+        msg_expr["function_call"] = function_call.get_message()
+        return msg_expr
+
+    def docpath_member(self):
+        self.consume_token(TokenType.DOT)
+        token = self.tokens[self.pos]
+
+        if token.token_type == TokenType.IDENT:
+            if token.value.startswith('`') and token.value.endswith('`'):
+                raise ValueError("{0} is not a valid JSON/ECMAScript "
+                                 "identifier".format(token.value))
+            self.consume_token(TokenType.IDENT)
+            member_name = token.value
+        elif token.token_type == TokenType.LSTRING:
+            self.consume_token(TokenType.LSTRING)
+            member_name = token.value
+        else:
+            raise ValueError("Expected token type IDENT or LSTRING in JSON "
+                             "path at token pos {0}".format(self.pos))
+        doc_path_item = Message("Mysqlx.Expr.DocumentPathItem")
+        doc_path_item["type"] = mysqlxpb_enum(
+            "Mysqlx.Expr.DocumentPathItem.Type.MEMBER")
+        doc_path_item["value"] = member_name
+        return doc_path_item
+
+    def docpath_array_loc(self):
+        self.consume_token(TokenType.LSQBRACKET)
+        if self.cur_token_type_is(TokenType.MUL):
+            self.consume_token(TokenType.MUL)
+            self.consume_token(TokenType.RSQBRACKET)
+            doc_path_item = Message("Mysqlx.Expr.DocumentPathItem")
+            doc_path_item["type"] = mysqlxpb_enum(
+                "Mysqlx.Expr.DocumentPathItem.Type.ARRAY_INDEX_ASTERISK")
+            return doc_path_item
+        elif self.cur_token_type_is(TokenType.LNUM):
+            value = int(self.consume_token(TokenType.LNUM))
+            if value < 0:
+                raise IndexError("Array index cannot be negative at {0}"
+                                 "".format(self.pos))
+            self.consume_token(TokenType.RSQBRACKET)
+            doc_path_item = Message("Mysqlx.Expr.DocumentPathItem")
+            doc_path_item["type"] = mysqlxpb_enum(
+                "Mysqlx.Expr.DocumentPathItem.Type.ARRAY_INDEX")
+            doc_path_item["index"] = value
+            return doc_path_item
+        else:
+            raise ValueError("Exception token type MUL or LNUM in JSON "
+                             "path array index at token pos {0}"
+                             "".format(self.pos))
+
+    def document_field(self):
+        col_id = Message("Mysqlx.Expr.ColumnIdentifier")
+        if self.cur_token_type_is(TokenType.IDENT):
+            doc_path_item = Message("Mysqlx.Expr.DocumentPathItem")
+            doc_path_item["type"] = mysqlxpb_enum(
+                "Mysqlx.Expr.DocumentPathItem.Type.MEMBER")
+            doc_path_item["value"] = self.consume_token(TokenType.IDENT)
+            col_id["document_path"].extend([doc_path_item.get_message()])
+        col_id["document_path"].extend(self.document_path())
+        if self.path_name_queue:
+            col_id["name"] = self.path_name_queue[0]
+        expr = Message("Mysqlx.Expr.Expr")
+        expr["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.IDENT")
+        expr["identifier"] = col_id
+        return expr
+
+    def document_path(self):
+        """Parse a JSON-style document path, like WL#7909, but prefix by @.
+        instead of $. We parse this as a string because the protocol doesn't
+        support it. (yet)
+        """
+        doc_path = []
+        while True:
+            if self.cur_token_type_is(TokenType.DOT):
+                doc_path.append(self.docpath_member().get_message())
+            elif self.cur_token_type_is(TokenType.DOTSTAR):
+                self.consume_token(TokenType.DOTSTAR)
+                doc_path_item = Message("Mysqlx.Expr.DocumentPathItem")
+                doc_path_item["type"] = mysqlxpb_enum(
+                    "Mysqlx.Expr.DocumentPathItem.Type.MEMBER_ASTERISK")
+                doc_path.append(doc_path_item.get_message())
+            elif self.cur_token_type_is(TokenType.LSQBRACKET):
+                doc_path.append(self.docpath_array_loc().get_message())
+            elif self.cur_token_type_is(TokenType.DOUBLESTAR):
+                self.consume_token(TokenType.DOUBLESTAR)
+                doc_path_item = Message("Mysqlx.Expr.DocumentPathItem")
+                doc_path_item["type"] = mysqlxpb_enum(
+                    "Mysqlx.Expr.DocumentPathItem.Type.DOUBLE_ASTERISK")
+                doc_path.append(doc_path_item.get_message())
+            else:
+                break
+        items = len(doc_path)
+        if items > 0 and get_item_or_attr(doc_path[items - 1], "type") == \
+           mysqlxpb_enum("Mysqlx.Expr.DocumentPathItem.Type.DOUBLE_ASTERISK"):
+            raise ValueError("JSON path may not end in '**' at {0}"
+                             "".format(self.pos))
+        return doc_path
+
+    def column_identifier(self):
+        parts = []
+        parts.append(self.consume_token(TokenType.IDENT))
+        while self.cur_token_type_is(TokenType.DOT):
+            self.consume_token(TokenType.DOT)
+            parts.append(self.consume_token(TokenType.IDENT))
+        if len(parts) > 3:
+            raise ValueError("Too many parts to identifier at {0}"
+                             "".format(self.pos))
+        parts.reverse()
+        col_id = Message("Mysqlx.Expr.ColumnIdentifier")
+        # clever way to apply them to the struct
+        for i in range(0, len(parts)):
+            if i == 0:
+                col_id["name"] = parts[0]
+            elif i == 1:
+                col_id["table_name"] = parts[1]
+            elif i == 2:
+                col_id["schema_name"] = parts[2]
+
+        is_doc = False
+        if self.cur_token_type_is(TokenType.DOLLAR):
+            is_doc = True
+            self.consume_token(TokenType.DOLLAR)
+            col_id["document_path"] = self.document_path()
+        elif self.cur_token_type_is(TokenType.ARROW):
+            is_doc = True
+            self.consume_token(TokenType.ARROW)
+            is_quoted = False
+            if self.cur_token_type_is(TokenType.QUOTE):
+                is_quoted = True
+                self.consume_token(TokenType.QUOTE)
+            self.consume_token(TokenType.DOLLAR)
+            col_id["document_path"] = self.document_path()
+            if is_quoted:
+                self.consume_token(TokenType.QUOTE)
+
+        if is_doc and len(col_id["document_path"]) == 0:
+            doc_path_item = Message("Mysqlx.Expr.DocumentPathItem")
+            doc_path_item["type"] = mysqlxpb_enum(
+                "Mysqlx.Expr.DocumentPathItem.Type.MEMBER")
+            doc_path_item["value"] = ""
+            col_id["document_path"].extend([doc_path_item.get_message()])
+
+        msg_expr = Message("Mysqlx.Expr.Expr")
+        msg_expr["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.IDENT")
+        msg_expr["identifier"] = col_id
+        return msg_expr
+
+    def next_token(self):
+        if self.pos >= len(self.tokens):
+            raise ValueError("Unexpected end of token stream")
+        token = self.tokens[self.pos]
+        self.pos += 1
+        return token
+
+    def expect_token(self, token_type):
+        token = self.next_token()
+        if token.token_type != token_type:
+            raise ValueError("Expected token type {0}".format(token_type))
+
+    def peek_token(self):
+        return self.tokens[self.pos]
+
+    def consume_any_token(self):
+        value = self.tokens[self.pos].value
+        self.pos += 1
+        return value
+
+    def parse_json_array(self):
+        """
+        jsonArray            ::=  "[" [ expr ("," expr)* ] "]"
+        """
+        msg = Message("Mysqlx.Expr.Array")
+        while self.pos < len(self.tokens) and \
+            not self.cur_token_type_is(TokenType.RSQBRACKET):
+            msg["value"].extend([self._expr().get_message()])
+            if not self.cur_token_type_is(TokenType.COMMA):
+                break
+            self.consume_token(TokenType.COMMA)
+        self.consume_token(TokenType.RSQBRACKET)
+
+        expr = Message("Mysqlx.Expr.Expr")
+        expr["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.ARRAY")
+        expr["array"] = msg.get_message()
+        return expr
+
+    def parse_json_doc(self):
+        """
+        jsonDoc              ::=  "{" [jsonKeyValue ("," jsonKeyValue)*] "}"
+        jsonKeyValue         ::=  STRING_DQ ":" expr
+        """
+        msg = Message("Mysqlx.Expr.Object")
+        while self.pos < len(self.tokens) and \
+            not self.cur_token_type_is(TokenType.RCURLY):
+            item = Message("Mysqlx.Expr.Object.ObjectField")
+            item["key"] = self.consume_token(TokenType.LSTRING)
+            self.consume_token(TokenType.COLON)
+            item["value"] = self._expr().get_message()
+            msg["fld"].extend([item.get_message()])
+            if not self.cur_token_type_is(TokenType.COMMA):
+                break
+            self.consume_token(TokenType.COMMA)
+        self.consume_token(TokenType.RCURLY)
+
+        expr = Message("Mysqlx.Expr.Expr")
+        expr["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.OBJECT")
+        expr["object"] = msg.get_message()
+        return expr
+
+    def parse_place_holder(self, token):
+        place_holder_name = ""
+        if self.cur_token_type_is(TokenType.LNUM):
+            place_holder_name = self.consume_token(TokenType.LNUM)
+        elif self.cur_token_type_is(TokenType.IDENT):
+            place_holder_name = self.consume_token(TokenType.IDENT)
+        elif token.token_type == TokenType.EROTEME:
+            place_holder_name = str(self.positional_placeholder_count)
+        else:
+            raise ValueError("Invalid placeholder name at token pos {0}"
+                             "".format(self.pos))
+
+        msg_expr = Message("Mysqlx.Expr.Expr")
+        msg_expr["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.PLACEHOLDER")
+        if place_holder_name in self.placeholder_name_to_position:
+            msg_expr["position"] = \
+                self.placeholder_name_to_position[place_holder_name]
+        else:
+            msg_expr["position"] = self.positional_placeholder_count
+            self.placeholder_name_to_position[place_holder_name] = \
+                self.positional_placeholder_count
+            self.positional_placeholder_count += 1
+        return msg_expr
+
+    def cast(self):
+        """ cast ::= CAST LPAREN expr AS cast_data_type RPAREN
+        """
+        operator = Message("Mysqlx.Expr.Operator", name="cast")
+        self.consume_token(TokenType.LPAREN)
+        operator["param"].extend([self._expr().get_message()])
+        self.consume_token(TokenType.AS)
+
+        type_scalar = build_bytes_scalar(str.encode(self.cast_data_type()))
+        operator["param"].extend(
+            [build_literal_expr(type_scalar).get_message()])
+        self.consume_token(TokenType.RPAREN)
+        msg = Message("Mysqlx.Expr.Expr", operator=operator.get_message())
+        msg["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.OPERATOR")
+        return msg
+
+    def cast_data_type(self):
+        """ cast_data_type ::= ( BINARY dimension? ) |
+                               ( CHAR dimension? ) |
+                               ( DATE ) |
+                               ( DATETIME dimension? ) |
+                               ( TIME dimension? ) |
+                               ( DECIMAL dimension? ) |
+                               ( SIGNED INTEGER? ) |
+                               ( UNSIGNED INTEGER? ) |
+                               JSON
+        """
+        token = self.next_token()
+        if token.token_type in (TokenType.BINARY, TokenType.CHAR,
+                                TokenType.DATETIME, TokenType.TIME,):
+            dimension = self.cast_data_type_dimension()
+            return "{0}{1}".format(token.value, dimension) \
+                    if dimension else token.value
+        elif token.token_type is TokenType.DECIMAL:
+            dimension = self.cast_data_type_dimension(True)
+            return "{0}{1}".format(token.value, dimension) \
+                    if dimension else token.value
+        elif token.token_type in (TokenType.SIGNED, TokenType.UNSIGNED,):
+            if self.cur_token_type_is(TokenType.INTEGER):
+                self.consume_token(TokenType.INTEGER)
+            return token.value
+        elif token.token_type in (TokenType.INTEGER, TokenType.JSON,
+                                  TokenType.DATE,):
+            return token.value
+
+        raise ValueError("Unknown token type {0} at position {1} ({2})"
+                         "".format(token.token_type, self.pos, token.value))
+
+    def cast_data_type_dimension(self, decimal=False):
+        """ dimension ::= LPAREN LNUM (, LNUM)? RPAREN
+        """
+        if not self.cur_token_type_is(TokenType.LPAREN):
+            return None
+
+        dimension = []
+        self.consume_token(TokenType.LPAREN)
+        dimension.append(self.consume_token(TokenType.LNUM))
+        if decimal and self.cur_token_type_is(TokenType.COMMA):
+            self.consume_token(TokenType.COMMA)
+            dimension.append(self.consume_token(TokenType.LNUM))
+        self.consume_token(TokenType.RPAREN)
+
+        return "({0})".format(dimension[0]) if len(dimension) == 1 else \
+               "({0},{1})".format(*dimension)
+
+    def star_operator(self):
+        msg = Message("Mysqlx.Expr.Expr")
+        msg["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.OPERATOR")
+        msg["operator"] = Message("Mysqlx.Expr.Operator", name="*")
+        return msg
+
+    def atomic_expr(self):
+        """Parse an atomic expression and return a protobuf Expr object"""
+        token = self.next_token()
+
+        if token.token_type in [TokenType.EROTEME, TokenType.COLON]:
+            return self.parse_place_holder(token)
+        elif token.token_type == TokenType.LCURLY:
+            return self.parse_json_doc()
+        elif token.token_type == TokenType.LSQBRACKET:
+            return self.parse_json_array()
+        elif token.token_type == TokenType.CAST:
+            return self.cast()
+        elif token.token_type == TokenType.LPAREN:
+            expr = self._expr()
+            self.expect_token(TokenType.RPAREN)
+            return expr
+        elif token.token_type in [TokenType.PLUS, TokenType.MINUS]:
+            peek = self.peek_token()
+            if peek.token_type == TokenType.LNUM:
+                self.tokens[self.pos].value = token.value + peek.value
+                return self.atomic_expr()
+            return build_unary_op(token.value, self.atomic_expr())
+        elif token.token_type in [TokenType.NOT, TokenType.NEG, TokenType.BANG]:
+            return build_unary_op(token.value, self.atomic_expr())
+        elif token.token_type == TokenType.LSTRING:
+            return build_literal_expr(build_string_scalar(token.value))
+        elif token.token_type == TokenType.NULL:
+            return build_literal_expr(build_null_scalar())
+        elif token.token_type == TokenType.LNUM:
+            if "." in token.value:
+                return build_literal_expr(
+                    build_double_scalar(float(token.value)))
+            return build_literal_expr(build_int_scalar(int(token.value)))
+        elif token.token_type in [TokenType.TRUE, TokenType.FALSE]:
+            return build_literal_expr(
+                build_bool_scalar(token.token_type == TokenType.TRUE))
+        elif token.token_type == TokenType.DOLLAR:
+            return self.document_field()
+        elif token.token_type == TokenType.MUL:
+            return self.star_operator()
+        elif token.token_type == TokenType.IDENT:
+            self.pos = self.pos - 1  # stay on the identifier
+            if self.next_token_type_is(TokenType.LPAREN) or \
+               (self.next_token_type_is(TokenType.DOT) and
+                self.pos_token_type_is(self.pos + 2, TokenType.IDENT) and
+                self.pos_token_type_is(self.pos + 3, TokenType.LPAREN)):
+                # Function call
+                return self.function_call()
+            return (self.document_field()
+                    if not self._allow_relational_columns
+                    else self.column_identifier())
+
+        raise ValueError("Unknown token type = {0}  when expecting atomic "
+                         "expression at {1}"
+                         "".format(token.token_type, self.pos))
+
+    def parse_left_assoc_binary_op_expr(self, types, inner_parser):
+        """Given a `set' of types and an Expr-returning inner parser function,
+        parse a left associate binary operator expression"""
+        lhs = inner_parser()
+        while (self.pos < len(self.tokens) and
+               self.tokens[self.pos].token_type in types):
+            msg = Message("Mysqlx.Expr.Expr")
+            msg["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.OPERATOR")
+            operator = Message("Mysqlx.Expr.Operator")
+            operator["name"] = _OPERATORS[self.tokens[self.pos].value]
+            operator["param"] = [lhs.get_message()]
+            self.pos += 1
+            operator["param"].extend([inner_parser().get_message()])
+            msg["operator"] = operator
+            lhs = msg
+        return lhs
+
+    # operator precedence is implemented here
+    def add_sub_interval(self):
+        lhs = self.atomic_expr()
+        if self.cur_token_type_in(TokenType.PLUS, TokenType.MINUS) and \
+           self.next_token_type_is(TokenType.INTERVAL):
+            token = self.next_token()
+
+            operator = Message("Mysqlx.Expr.Operator")
+            operator["param"].extend([lhs.get_message()])
+            operator["name"] = "date_add" if token.token_type is TokenType.PLUS \
+                               else "date_sub"
+
+            self.consume_token(TokenType.INTERVAL)
+            operator["param"].extend([self.bit_expr().get_message()])
+
+            if not self.cur_token_type_in(*_INTERVAL_UNITS):
+                raise ValueError("Expected interval type at position {0}"
+                                 "".format(self.pos))
+
+            token = str.encode(self.consume_any_token().upper())
+            operator["param"].extend([build_literal_expr(
+                build_bytes_scalar(token)).get_message()])
+
+            lhs = Message("Mysqlx.Expr.Expr", operator=operator)
+            lhs["type"] = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.OPERATOR")
+
+        return lhs
+
+    def mul_div_expr(self):
+        return self.parse_left_assoc_binary_op_expr(
+            set([TokenType.MUL, TokenType.DIV, TokenType.MOD]),
+            self.add_sub_interval)
+
+    def add_sub_expr(self):
+        return self.parse_left_assoc_binary_op_expr(
+            set([TokenType.PLUS, TokenType.MINUS]), self.mul_div_expr)
+
+    def shift_expr(self):
+        return self.parse_left_assoc_binary_op_expr(
+            set([TokenType.LSHIFT, TokenType.RSHIFT]), self.add_sub_expr)
+
+    def bit_expr(self):
+        return self.parse_left_assoc_binary_op_expr(
+            set([TokenType.BITAND, TokenType.BITOR, TokenType.BITXOR]),
+            self.shift_expr)
+
+    def comp_expr(self):
+        return self.parse_left_assoc_binary_op_expr(
+            set([TokenType.GE, TokenType.GT, TokenType.LE, TokenType.LT,
+                 TokenType.EQ, TokenType.NE]), self.bit_expr)
+
+    def ilri_expr(self):
+        params = []
+        lhs = self.comp_expr()
+        is_not = False
+        if self.cur_token_type_is(TokenType.NOT):
+            is_not = True
+            self.consume_token(TokenType.NOT)
+        if self.pos < len(self.tokens):
+            params.append(lhs.get_message())
+            op_name = self.tokens[self.pos].value
+            if self.cur_token_type_is(TokenType.IS):
+                self.consume_token(TokenType.IS)
+                # for IS, NOT comes AFTER
+                if self.cur_token_type_is(TokenType.NOT):
+                    is_not = True
+                    self.consume_token(TokenType.NOT)
+                params.append(self.comp_expr().get_message())
+            elif self.cur_token_type_is(TokenType.IN):
+                self.consume_token(TokenType.IN)
+                if self.cur_token_type_is(TokenType.LPAREN):
+                    params.extend(self.paren_expr_list())
+                else:
+                    op_name = "cont_in"
+                    params.append(self.comp_expr().get_message())
+            elif self.cur_token_type_is(TokenType.OVERLAPS):
+                self.consume_token(TokenType.OVERLAPS)
+                params.append(self.comp_expr().get_message())
+
+            elif self.cur_token_type_is(TokenType.LIKE):
+                self.consume_token(TokenType.LIKE)
+                params.append(self.comp_expr().get_message())
+                if self.cur_token_type_is(TokenType.ESCAPE):
+                    self.consume_token(TokenType.ESCAPE)
+                    params.append(self.comp_expr().get_message())
+            elif self.cur_token_type_is(TokenType.BETWEEN):
+                self.consume_token(TokenType.BETWEEN)
+                params.append(self.comp_expr().get_message())
+                self.consume_token(TokenType.AND)
+                params.append(self.comp_expr().get_message())
+            elif self.cur_token_type_is(TokenType.REGEXP):
+                self.consume_token(TokenType.REGEXP)
+                params.append(self.comp_expr().get_message())
+            else:
+                if is_not:
+                    raise ValueError("Unknown token after NOT as pos {0}"
+                                     "".format(self.pos))
+                op_name = None  # not an operator we're interested in
+            if op_name:
+                operator = Message("Mysqlx.Expr.Operator")
+                operator["name"] = _NEGATION[op_name] if is_not else op_name
+                operator["param"] = params
+                msg_expr = Message("Mysqlx.Expr.Expr")
+                msg_expr["type"] = mysqlxpb_enum(
+                    "Mysqlx.Expr.Expr.Type.OPERATOR")
+                msg_expr["operator"] = operator.get_message()
+                lhs = msg_expr
+        return lhs
+
+    def and_expr(self):
+        return self.parse_left_assoc_binary_op_expr(
+            set([TokenType.AND, TokenType.ANDAND]), self.ilri_expr)
+
+    def xor_expr(self):
+        return self.parse_left_assoc_binary_op_expr(
+            set([TokenType.XOR]), self.and_expr)
+
+    def or_expr(self):
+        return self.parse_left_assoc_binary_op_expr(
+            set([TokenType.OR, TokenType.OROR]), self.xor_expr)
+
+    def _expr(self, reparse=False):
+        if reparse:
+            self.tokens = []
+            self.pos = 0
+            self.placeholder_name_to_position = {}
+            self.positional_placeholder_count = 0
+            self.lex()
+        return self.or_expr()
+
+    def expr(self, reparse=False):
+        expression = self._expr(reparse)
+        used_tokens = self.pos
+        if self.pos_token_type_is(len(self.tokens) - 2, TokenType.AS):
+            used_tokens += 2
+        if used_tokens < len(self.tokens):
+            raise ValueError("Unused token types {} found in expression at "
+                             "position: {}".format(self.tokens[self.pos:],
+                                                   self.pos))
+        return expression
+
+    def parse_table_insert_field(self):
+        return Message("Mysqlx.Crud.Column",
+                       name=self.consume_token(TokenType.IDENT))
+
+    def parse_table_update_field(self):
+        return self.column_identifier().identifier
+
+    def _table_fields(self):
+        fields = []
+        temp = self.string.split(",")
+        temp.reverse()
+        while temp:
+            field = temp.pop()
+            while field.count("(") != field.count(")") or \
+                field.count("[") != field.count("]") or \
+                field.count("{") != field.count("}"):
+                field = "{1},{0}".format(temp.pop(), field)
+            fields.append(field.strip())
+        return fields
+
+    def parse_table_select_projection(self):
+        project_expr = []
+        first = True
+        fields = self._table_fields()
+        while self.pos < len(self.tokens):
+            if not first:
+                self.consume_token(TokenType.COMMA)
+            first = False
+            projection = Message("Mysqlx.Crud.Projection", source=self._expr())
+            if self.cur_token_type_is(TokenType.AS):
+                self.consume_token(TokenType.AS)
+                projection["alias"] = self.consume_token(TokenType.IDENT)
+            else:
+                projection["alias"] = fields[len(project_expr)]
+            project_expr.append(projection.get_message())
+
+        return project_expr
+
+    def parse_order_spec(self):
+        order_specs = []
+        first = True
+        while self.pos < len(self.tokens):
+            if not first:
+                self.consume_token(TokenType.COMMA)
+            first = False
+            order = Message("Mysqlx.Crud.Order", expr=self._expr())
+            if self.cur_token_type_is(TokenType.ORDERBY_ASC):
+                order["direction"] = mysqlxpb_enum(
+                    "Mysqlx.Crud.Order.Direction.ASC")
+                self.consume_token(TokenType.ORDERBY_ASC)
+            elif self.cur_token_type_is(TokenType.ORDERBY_DESC):
+                order["direction"] = mysqlxpb_enum(
+                    "Mysqlx.Crud.Order.Direction.DESC")
+                self.consume_token(TokenType.ORDERBY_DESC)
+            order_specs.append(order.get_message())
+        return order_specs
+
+    def parse_expr_list(self):
+        expr_list = []
+        first = True
+        while self.pos < len(self.tokens):
+            if not first:
+                self.consume_token(TokenType.COMMA)
+            first = False
+            expr_list.append(self._expr().get_message())
+        return expr_list
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/helpers.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/helpers.py
new file mode 100644
index 0000000..1b4cf09
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/helpers.py
@@ -0,0 +1,194 @@
+# Copyright (c) 2017, 2019, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+"""This module contains helper functions."""
+
+import functools
+import inspect
+import warnings
+
+from .compat import NUMERIC_TYPES
+from .constants import TLS_CIPHER_SUITES, TLS_VERSIONS
+from .errors import InterfaceError
+
+
+def encode_to_bytes(value, encoding="utf-8"):
+    """Returns an encoded version of the string as a bytes object.
+
+    Args:
+        encoding (str): The encoding.
+
+    Resturns:
+        bytes: The encoded version of the string as a bytes object.
+    """
+    return value if isinstance(value, bytes) else value.encode(encoding)
+
+
+def decode_from_bytes(value, encoding="utf-8"):
+    """Returns a string decoded from the given bytes.
+
+    Args:
+        value (bytes): The value to be decoded.
+        encoding (str): The encoding.
+
+    Returns:
+        str: The value decoded from bytes.
+    """
+    return value.decode(encoding) if isinstance(value, bytes) else value
+
+
+def get_item_or_attr(obj, key):
+    """Get item from dictionary or attribute from object.
+
+    Args:
+        obj (object): Dictionary or object.
+        key (str): Key.
+
+    Returns:
+        object: The object for the provided key.
+    """
+    return obj[key] if isinstance(obj, dict) else getattr(obj, key)
+
+
+def escape(*args):
+    """Escapes special characters as they are expected to be when MySQL
+    receives them.
+    As found in MySQL source mysys/charset.c
+
+    Args:
+        value (object): Value to be escaped.
+
+    Returns:
+        str: The value if not a string, or the escaped string.
+    """
+    def _escape(value):
+        """Escapes special characters."""
+        if value is None:
+            return value
+        elif isinstance(value, NUMERIC_TYPES):
+            return value
+        if isinstance(value, (bytes, bytearray)):
+            value = value.replace(b'\\', b'\\\\')
+            value = value.replace(b'\n', b'\\n')
+            value = value.replace(b'\r', b'\\r')
+            value = value.replace(b'\047', b'\134\047')  # single quotes
+            value = value.replace(b'\042', b'\134\042')  # double quotes
+            value = value.replace(b'\032', b'\134\032')  # for Win32
+        else:
+            value = value.replace('\\', '\\\\')
+            value = value.replace('\n', '\\n')
+            value = value.replace('\r', '\\r')
+            value = value.replace('\047', '\134\047')  # single quotes
+            value = value.replace('\042', '\134\042')  # double quotes
+            value = value.replace('\032', '\134\032')  # for Win32
+        return value
+    if len(args) > 1:
+        return [_escape(arg) for arg in args]
+    return _escape(args[0])
+
+
+def quote_identifier(identifier, sql_mode=""):
+    """Quote the given identifier with backticks, converting backticks (`)
+    in the identifier name with the correct escape sequence (``) unless the
+    identifier is quoted (") as in sql_mode set to ANSI_QUOTES.
+
+    Args:
+        identifier (str): Identifier to quote.
+
+    Returns:
+        str: Returns string with the identifier quoted with backticks.
+    """
+    if sql_mode == "ANSI_QUOTES":
+        return '"{0}"'.format(identifier.replace('"', '""'))
+    return "`{0}`".format(identifier.replace("`", "``"))
+
+
+def deprecated(version=None, reason=None):
+    """This is a decorator used to mark functions as deprecated.
+
+    Args:
+        version (Optional[string]): Version when was deprecated.
+        reason (Optional[string]): Reason or extra information to be shown.
+
+    Usage:
+
+    .. code-block:: python
+
+       from mysqlx.helpers import deprecated
+
+       @deprecated('8.0.12', 'Please use other_function() instead')
+       def deprecated_function(x, y):
+           return x + y
+    """
+    def decorate(func):
+        """Decorate function."""
+        @functools.wraps(func)
+        def wrapper(*args, **kwargs):
+            """Wrapper function.
+
+            Args:
+                *args: Variable length argument list.
+                **kwargs: Arbitrary keyword arguments.
+            """
+            message = ["'{}' is deprecated".format(func.__name__)]
+            if version:
+                message.append(" since version {}".format(version))
+            if reason:
+                message.append(". {}".format(reason))
+            frame = inspect.currentframe().f_back
+            warnings.warn_explicit("".join(message),
+                                   category=DeprecationWarning,
+                                   filename=inspect.getfile(frame.f_code),
+                                   lineno=frame.f_lineno)
+            return func(*args, **kwargs)
+        return wrapper
+    return decorate
+
+def iani_to_openssl_cs_name(tls_version, cipher_suites_names):
+    """Translates a cipher suites names list; from IANI names to OpenSSL names.
+
+    Args:
+        TLS_version (str): The TLS version to look at for a translation.
+        cipher_suite_names (list): A list of cipher suites names.
+    """
+    translated_names = []
+
+    cipher_suites = {}#TLS_CIPHER_SUITES[TLS_version]
+
+    # Find the previews TLS versions of the given on TLS_version
+    for index in range(TLS_VERSIONS.index(tls_version) + 1):
+        cipher_suites.update(TLS_CIPHER_SUITES[TLS_VERSIONS[index]])
+
+    for name in cipher_suites_names:
+        if "-" in name:
+            translated_names.append(name)
+        elif name in cipher_suites:
+            translated_names.append(cipher_suites[name])
+        else:
+            raise InterfaceError("The '{}' in cipher suites is not a valid "
+                                 "cipher suite".format(name))
+    return translated_names
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/locales/__init__.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/locales/__init__.py
new file mode 100644
index 0000000..be63763
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/locales/__init__.py
@@ -0,0 +1,73 @@
+# Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Translations"""
+
+__all__ = ["get_client_error"]
+
+from .. import errorcode
+
+
+def get_client_error(error, language="eng"):
+    """Lookup client error
+
+    This function will lookup the client error message based on the given
+    error and return the error message. If the error was not found,
+    None will be returned.
+
+    Error can be either an integer or a string. For example:
+        error: 2000
+        error: CR_UNKNOWN_ERROR
+
+    The language attribute can be used to retrieve a localized message, when
+    available.
+
+    Returns a string or None.
+    """
+    try:
+        tmp = __import__("mysqlx.locales.{0}".format(language),
+                         globals(), locals(), ["client_error"])
+    except ImportError:
+        raise ImportError("No localization support for language '{0}'"
+                          "".format(language))
+    client_error = tmp.client_error
+
+    if isinstance(error, int):
+        errno = error
+        for key, value in errorcode.__dict__.items():
+            if value == errno:
+                error = key
+                break
+
+    if isinstance(error, (str)):
+        try:
+            return getattr(client_error, error)
+        except AttributeError:
+            return None
+
+    raise ValueError("Error argument needs to be either an integer or string")
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/locales/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/mysqlx/locales/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/locales/eng/__pycache__/client_error.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/mysqlx/locales/eng/__pycache__/client_error.cpython-38.pyc
new file mode 100644
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diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/locales/eng/client_error.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/locales/eng/client_error.py
new file mode 100644
index 0000000..a9ed8b9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/locales/eng/client_error.py
@@ -0,0 +1,102 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# This file was auto-generated.
+_GENERATED_ON = '2018-03-16'
+_MYSQL_VERSION = (8, 0, 11)
+
+# Start MySQL Error messages
+CR_UNKNOWN_ERROR = u"Unknown MySQL error"
+CR_SOCKET_CREATE_ERROR = u"Can't create UNIX socket (%s)"
+CR_CONNECTION_ERROR = u"Can't connect to local MySQL server through socket '%-.100s' (%s)"
+CR_CONN_HOST_ERROR = u"Can't connect to MySQL server on '%-.100s' (%s)"
+CR_IPSOCK_ERROR = u"Can't create TCP/IP socket (%s)"
+CR_UNKNOWN_HOST = u"Unknown MySQL server host '%-.100s' (%s)"
+CR_SERVER_GONE_ERROR = u"MySQL server has gone away"
+CR_VERSION_ERROR = u"Protocol mismatch; server version = %s, client version = %s"
+CR_OUT_OF_MEMORY = u"MySQL client ran out of memory"
+CR_WRONG_HOST_INFO = u"Wrong host info"
+CR_LOCALHOST_CONNECTION = u"Localhost via UNIX socket"
+CR_TCP_CONNECTION = u"%-.100s via TCP/IP"
+CR_SERVER_HANDSHAKE_ERR = u"Error in server handshake"
+CR_SERVER_LOST = u"Lost connection to MySQL server during query"
+CR_COMMANDS_OUT_OF_SYNC = u"Commands out of sync; you can't run this command now"
+CR_NAMEDPIPE_CONNECTION = u"Named pipe: %-.32s"
+CR_NAMEDPIPEWAIT_ERROR = u"Can't wait for named pipe to host: %-.64s  pipe: %-.32s (%s)"
+CR_NAMEDPIPEOPEN_ERROR = u"Can't open named pipe to host: %-.64s  pipe: %-.32s (%s)"
+CR_NAMEDPIPESETSTATE_ERROR = u"Can't set state of named pipe to host: %-.64s  pipe: %-.32s (%s)"
+CR_CANT_READ_CHARSET = u"Can't initialize character set %-.32s (path: %-.100s)"
+CR_NET_PACKET_TOO_LARGE = u"Got packet bigger than 'max_allowed_packet' bytes"
+CR_EMBEDDED_CONNECTION = u"Embedded server"
+CR_PROBE_SLAVE_STATUS = u"Error on SHOW SLAVE STATUS:"
+CR_PROBE_SLAVE_HOSTS = u"Error on SHOW SLAVE HOSTS:"
+CR_PROBE_SLAVE_CONNECT = u"Error connecting to slave:"
+CR_PROBE_MASTER_CONNECT = u"Error connecting to master:"
+CR_SSL_CONNECTION_ERROR = u"SSL connection error: %-.100s"
+CR_MALFORMED_PACKET = u"Malformed packet"
+CR_WRONG_LICENSE = u"This client library is licensed only for use with MySQL servers having '%s' license"
+CR_NULL_POINTER = u"Invalid use of null pointer"
+CR_NO_PREPARE_STMT = u"Statement not prepared"
+CR_PARAMS_NOT_BOUND = u"No data supplied for parameters in prepared statement"
+CR_DATA_TRUNCATED = u"Data truncated"
+CR_NO_PARAMETERS_EXISTS = u"No parameters exist in the statement"
+CR_INVALID_PARAMETER_NO = u"Invalid parameter number"
+CR_INVALID_BUFFER_USE = u"Can't send long data for non-string/non-binary data types (parameter: %s)"
+CR_UNSUPPORTED_PARAM_TYPE = u"Using unsupported buffer type: %s  (parameter: %s)"
+CR_SHARED_MEMORY_CONNECTION = u"Shared memory: %-.100s"
+CR_SHARED_MEMORY_CONNECT_REQUEST_ERROR = u"Can't open shared memory; client could not create request event (%s)"
+CR_SHARED_MEMORY_CONNECT_ANSWER_ERROR = u"Can't open shared memory; no answer event received from server (%s)"
+CR_SHARED_MEMORY_CONNECT_FILE_MAP_ERROR = u"Can't open shared memory; server could not allocate file mapping (%s)"
+CR_SHARED_MEMORY_CONNECT_MAP_ERROR = u"Can't open shared memory; server could not get pointer to file mapping (%s)"
+CR_SHARED_MEMORY_FILE_MAP_ERROR = u"Can't open shared memory; client could not allocate file mapping (%s)"
+CR_SHARED_MEMORY_MAP_ERROR = u"Can't open shared memory; client could not get pointer to file mapping (%s)"
+CR_SHARED_MEMORY_EVENT_ERROR = u"Can't open shared memory; client could not create %s event (%s)"
+CR_SHARED_MEMORY_CONNECT_ABANDONED_ERROR = u"Can't open shared memory; no answer from server (%s)"
+CR_SHARED_MEMORY_CONNECT_SET_ERROR = u"Can't open shared memory; cannot send request event to server (%s)"
+CR_CONN_UNKNOW_PROTOCOL = u"Wrong or unknown protocol"
+CR_INVALID_CONN_HANDLE = u"Invalid connection handle"
+CR_UNUSED_1 = u"Connection using old (pre-4.1.1) authentication protocol refused (client option 'secure_auth' enabled)"
+CR_FETCH_CANCELED = u"Row retrieval was canceled by mysql_stmt_close() call"
+CR_NO_DATA = u"Attempt to read column without prior row fetch"
+CR_NO_STMT_METADATA = u"Prepared statement contains no metadata"
+CR_NO_RESULT_SET = u"Attempt to read a row while there is no result set associated with the statement"
+CR_NOT_IMPLEMENTED = u"This feature is not implemented yet"
+CR_SERVER_LOST_EXTENDED = u"Lost connection to MySQL server at '%s', system error: %s"
+CR_STMT_CLOSED = u"Statement closed indirectly because of a preceding %s() call"
+CR_NEW_STMT_METADATA = u"The number of columns in the result set differs from the number of bound buffers. You must reset the statement, rebind the result set columns, and execute the statement again"
+CR_ALREADY_CONNECTED = u"This handle is already connected. Use a separate handle for each connection."
+CR_AUTH_PLUGIN_CANNOT_LOAD = u"Authentication plugin '%s' cannot be loaded: %s"
+CR_DUPLICATE_CONNECTION_ATTR = u"There is an attribute with the same name already"
+CR_AUTH_PLUGIN_ERR = u"Authentication plugin '%s' reported error: %s"
+CR_INSECURE_API_ERR = u"Insecure API function call: '%s' Use instead: '%s'"
+CR_FILE_NAME_TOO_LONG = u"File name is too long"
+CR_SSL_FIPS_MODE_ERR = u"Set FIPS mode ON/STRICT failed"
+# End MySQL Error messages
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/__init__.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/__init__.py
new file mode 100644
index 0000000..baba5a9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/__init__.py
@@ -0,0 +1,481 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""This module contains the implementation of a helper class for MySQL X
+Protobuf messages."""
+
+try:
+    ModuleNotFoundError
+except NameError:
+    ModuleNotFoundError = ImportError
+
+_SERVER_MESSAGES_TUPLES = (
+    ("Mysqlx.ServerMessages.Type.OK",
+     "Mysqlx.Ok"),
+    ("Mysqlx.ServerMessages.Type.ERROR",
+     "Mysqlx.Error"),
+    ("Mysqlx.ServerMessages.Type.CONN_CAPABILITIES",
+     "Mysqlx.Connection.Capabilities"),
+    ("Mysqlx.ServerMessages.Type.SESS_AUTHENTICATE_CONTINUE",
+     "Mysqlx.Session.AuthenticateContinue"),
+    ("Mysqlx.ServerMessages.Type.SESS_AUTHENTICATE_OK",
+     "Mysqlx.Session.AuthenticateOk"),
+    ("Mysqlx.ServerMessages.Type.NOTICE",
+     "Mysqlx.Notice.Frame"),
+    ("Mysqlx.ServerMessages.Type.RESULTSET_COLUMN_META_DATA",
+     "Mysqlx.Resultset.ColumnMetaData"),
+    ("Mysqlx.ServerMessages.Type.RESULTSET_ROW",
+     "Mysqlx.Resultset.Row"),
+    ("Mysqlx.ServerMessages.Type.RESULTSET_FETCH_DONE",
+     "Mysqlx.Resultset.FetchDone"),
+    ("Mysqlx.ServerMessages.Type.RESULTSET_FETCH_SUSPENDED",
+     "Mysqlx.Resultset.FetchSuspended"),
+    ("Mysqlx.ServerMessages.Type.RESULTSET_FETCH_DONE_MORE_RESULTSETS",
+     "Mysqlx.Resultset.FetchDoneMoreResultsets"),
+    ("Mysqlx.ServerMessages.Type.SQL_STMT_EXECUTE_OK",
+     "Mysqlx.Sql.StmtExecuteOk"),
+    ("Mysqlx.ServerMessages.Type.RESULTSET_FETCH_DONE_MORE_OUT_PARAMS",
+     "Mysqlx.Resultset.FetchDoneMoreOutParams"),
+    ("Mysqlx.ServerMessages.Type.COMPRESSION",
+     "Mysqlx.Connection.Compression"),
+)
+
+PROTOBUF_VERSION = None
+PROTOBUF_REPEATED_TYPES = [list]
+
+try:
+    import _mysqlxpb
+    SERVER_MESSAGES = dict([(int(_mysqlxpb.enum_value(key)), val)
+                            for key, val in _SERVER_MESSAGES_TUPLES])
+    HAVE_MYSQLXPB_CEXT = True
+except ImportError:
+    HAVE_MYSQLXPB_CEXT = False
+
+from ..compat import PY3, NUMERIC_TYPES, STRING_TYPES, BYTE_TYPES
+from ..helpers import encode_to_bytes
+
+try:
+    from google import protobuf
+    from google.protobuf import descriptor_database
+    from google.protobuf import descriptor_pb2
+    from google.protobuf import descriptor_pool
+    from google.protobuf import message_factory
+    from google.protobuf.internal.containers import (
+        RepeatedCompositeFieldContainer)
+    try:
+        from google.protobuf.pyext._message import (
+            RepeatedCompositeContainer)
+        PROTOBUF_REPEATED_TYPES.append(RepeatedCompositeContainer)
+    except ImportError:
+        pass
+
+    PROTOBUF_REPEATED_TYPES.append(RepeatedCompositeFieldContainer)
+    if hasattr(protobuf, "__version__"):
+        # Only Protobuf versions >=3.0.0 provide `__version__`
+        PROTOBUF_VERSION = protobuf.__version__
+
+    from . import mysqlx_connection_pb2
+    from . import mysqlx_crud_pb2
+    from . import mysqlx_cursor_pb2
+    from . import mysqlx_datatypes_pb2
+    from . import mysqlx_expect_pb2
+    from . import mysqlx_expr_pb2
+    from . import mysqlx_notice_pb2
+    from . import mysqlx_pb2
+    from . import mysqlx_prepare_pb2
+    from . import mysqlx_resultset_pb2
+    from . import mysqlx_session_pb2
+    from . import mysqlx_sql_pb2
+
+    # Dictionary with all messages descriptors
+    _MESSAGES = {}
+
+    # Mysqlx
+    for key, val in mysqlx_pb2.ClientMessages.Type.items():
+        _MESSAGES["Mysqlx.ClientMessages.Type.{0}".format(key)] = val
+    for key, val in mysqlx_pb2.ServerMessages.Type.items():
+        _MESSAGES["Mysqlx.ServerMessages.Type.{0}".format(key)] = val
+    for key, val in mysqlx_pb2.Error.Severity.items():
+        _MESSAGES["Mysqlx.Error.Severity.{0}".format(key)] = val
+
+    # Mysqlx.Crud
+    for key, val in mysqlx_crud_pb2.DataModel.items():
+        _MESSAGES["Mysqlx.Crud.DataModel.{0}".format(key)] = val
+    for key, val in mysqlx_crud_pb2.Find.RowLock.items():
+        _MESSAGES["Mysqlx.Crud.Find.RowLock.{0}".format(key)] = val
+    for key, val in mysqlx_crud_pb2.Order.Direction.items():
+        _MESSAGES["Mysqlx.Crud.Order.Direction.{0}".format(key)] = val
+    for key, val in mysqlx_crud_pb2.UpdateOperation.UpdateType.items():
+        _MESSAGES["Mysqlx.Crud.UpdateOperation.UpdateType.{0}".format(key)] = val
+
+    # Mysqlx.Datatypes
+    for key, val in mysqlx_datatypes_pb2.Scalar.Type.items():
+        _MESSAGES["Mysqlx.Datatypes.Scalar.Type.{0}".format(key)] = val
+    for key, val in mysqlx_datatypes_pb2.Any.Type.items():
+        _MESSAGES["Mysqlx.Datatypes.Any.Type.{0}".format(key)] = val
+
+    # Mysqlx.Expect
+    for key, val in mysqlx_expect_pb2.Open.Condition.ConditionOperation.items():
+        _MESSAGES["Mysqlx.Expect.Open.Condition.ConditionOperation.{0}"
+                  "".format(key)] = val
+    for key, val in mysqlx_expect_pb2.Open.Condition.Key.items():
+        _MESSAGES["Mysqlx.Expect.Open.Condition.Key.{0}"
+                  "".format(key)] = val
+    for key, val in mysqlx_expect_pb2.Open.CtxOperation.items():
+        _MESSAGES["Mysqlx.Expect.Open.CtxOperation.{0}".format(key)] = val
+
+    # Mysqlx.Expr
+    for key, val in mysqlx_expr_pb2.Expr.Type.items():
+        _MESSAGES["Mysqlx.Expr.Expr.Type.{0}".format(key)] = val
+    for key, val in mysqlx_expr_pb2.DocumentPathItem.Type.items():
+        _MESSAGES["Mysqlx.Expr.DocumentPathItem.Type.{0}".format(key)] = val
+
+    # Mysqlx.Notice
+    for key, val in mysqlx_notice_pb2.Frame.Scope.items():
+        _MESSAGES["Mysqlx.Notice.Frame.Scope.{0}".format(key)] = val
+    for key, val in mysqlx_notice_pb2.Warning.Level.items():
+        _MESSAGES["Mysqlx.Notice.Warning.Level.{0}".format(key)] = val
+    for key, val in mysqlx_notice_pb2.SessionStateChanged.Parameter.items():
+        _MESSAGES["Mysqlx.Notice.SessionStateChanged.Parameter.{0}"
+                  "".format(key)] = val
+
+    # Mysql.Prepare
+    for key, val in mysqlx_prepare_pb2.Prepare.OneOfMessage.Type.items():
+        _MESSAGES["Mysqlx.Prepare.Prepare.OneOfMessage.Type.{0}"
+                  "".format(key)] = val
+
+    # Mysql.Resultset
+    for key, val in mysqlx_resultset_pb2.ColumnMetaData.FieldType.items():
+        _MESSAGES["Mysqlx.Resultset.ColumnMetaData.FieldType.{0}".format(key)] = val
+
+    # Add messages to the descriptor pool
+    _DESCRIPTOR_DB = descriptor_database.DescriptorDatabase()
+    _DESCRIPTOR_POOL = descriptor_pool.DescriptorPool(_DESCRIPTOR_DB)
+
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_connection_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_crud_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_cursor_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_datatypes_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_expect_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_expr_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_notice_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_prepare_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_resultset_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_session_pb2.DESCRIPTOR.serialized_pb))
+    _DESCRIPTOR_DB.Add(descriptor_pb2.FileDescriptorProto.FromString(
+        mysqlx_sql_pb2.DESCRIPTOR.serialized_pb))
+
+    SERVER_MESSAGES = dict(
+        [(_MESSAGES[key], val) for key, val in _SERVER_MESSAGES_TUPLES]
+    )
+    HAVE_PROTOBUF = True
+    HAVE_PROTOBUF_ERROR = None
+
+    class _mysqlxpb_pure(object):
+        """This class implements the methods in pure Python used by the
+        _mysqlxpb C++ extension."""
+
+        factory = message_factory.MessageFactory()
+
+        @staticmethod
+        def new_message(name):
+            cls = _mysqlxpb_pure.factory.GetPrototype(
+                _DESCRIPTOR_POOL.FindMessageTypeByName(name))
+            return cls()
+
+        @staticmethod
+        def enum_value(key):
+            return _MESSAGES[key]
+
+        @staticmethod
+        def serialize_message(msg):
+            return msg.SerializeToString()
+
+        @staticmethod
+        def serialize_partial_message(msg):
+            return msg.SerializePartialToString()
+
+        @staticmethod
+        def parse_message(msg_type_name, payload):
+            msg = _mysqlxpb_pure.new_message(msg_type_name)
+            msg.ParseFromString(payload)
+            return msg
+
+        @staticmethod
+        def parse_server_message(msg_type, payload):
+            msg_type_name = SERVER_MESSAGES.get(msg_type)
+            if not msg_type_name:
+                raise ValueError("Unknown msg_type: {0}".format(msg_type))
+            msg = _mysqlxpb_pure.new_message(msg_type_name)
+            msg.ParseFromString(payload)
+            return msg
+except (ImportError, ModuleNotFoundError, SyntaxError, TypeError) as err:
+    HAVE_PROTOBUF = False
+    HAVE_PROTOBUF_ERROR = err if PROTOBUF_VERSION is not None \
+        else "Protobuf >=3.0.0 is required"
+    if not HAVE_MYSQLXPB_CEXT:
+        raise ImportError("Protobuf is not available: {}"
+                          "".format(HAVE_PROTOBUF_ERROR))
+
+CRUD_PREPARE_MAPPING = {
+    "Mysqlx.ClientMessages.Type.CRUD_FIND": (
+        "Mysqlx.Prepare.Prepare.OneOfMessage.Type.FIND", "find"),
+    "Mysqlx.ClientMessages.Type.CRUD_INSERT": (
+        "Mysqlx.Prepare.Prepare.OneOfMessage.Type.INSERT", "insert"),
+    "Mysqlx.ClientMessages.Type.CRUD_UPDATE": (
+        "Mysqlx.Prepare.Prepare.OneOfMessage.Type.UPDATE", "update"),
+    "Mysqlx.ClientMessages.Type.CRUD_DELETE": (
+        "Mysqlx.Prepare.Prepare.OneOfMessage.Type.DELETE", "delete"),
+    "Mysqlx.ClientMessages.Type.SQL_STMT_EXECUTE": (
+        "Mysqlx.Prepare.Prepare.OneOfMessage.Type.STMT", "stmt_execute")
+}
+
+
+class Protobuf(object):
+    """Protobuf class acts as a container of the Protobuf message class.
+    It allows the switch between the C extension and pure Python implementation
+    message handlers, by patching the `mysqlxpb` class attribute.
+    """
+    mysqlxpb = _mysqlxpb if HAVE_MYSQLXPB_CEXT else _mysqlxpb_pure
+    use_pure = False if HAVE_MYSQLXPB_CEXT else True
+
+    @staticmethod
+    def set_use_pure(use_pure):
+        """Sets whether to use the C extension or pure Python implementation.
+
+        Args:
+            use_pure (bool): `True` to use pure Python implementation.
+        """
+        if use_pure and not HAVE_PROTOBUF:
+            raise ImportError("Protobuf is not available: {}"
+                              "".format(HAVE_PROTOBUF_ERROR))
+        elif not use_pure and not HAVE_MYSQLXPB_CEXT:
+            raise ImportError("MySQL X Protobuf C extension is not available")
+        Protobuf.mysqlxpb = _mysqlxpb_pure if use_pure else _mysqlxpb
+        Protobuf.use_pure = use_pure
+
+
+class Message(object):
+    """Helper class for interfacing with the MySQL X Protobuf extension.
+
+    Args:
+        msg_type_name (string): Protobuf type name.
+        **kwargs: Arbitrary keyword arguments with values for the message.
+    """
+    def __init__(self, msg_type_name=None, **kwargs):
+        self.__dict__["_msg"] = Protobuf.mysqlxpb.new_message(msg_type_name) \
+            if msg_type_name else None
+        for key, value in kwargs.items():
+            self.__setattr__(key, value)
+
+    def __setattr__(self, name, value):
+        if Protobuf.use_pure:
+            if PY3 and isinstance(value, STRING_TYPES):
+                setattr(self._msg, name, encode_to_bytes(value))
+            elif isinstance(value, (NUMERIC_TYPES, STRING_TYPES, BYTE_TYPES)):
+                setattr(self._msg, name, value)
+            elif isinstance(value, list):
+                getattr(self._msg, name).extend(value)
+            elif isinstance(value, Message):
+                getattr(self._msg, name).MergeFrom(value.get_message())
+            else:
+                getattr(self._msg, name).MergeFrom(value)
+        else:
+            self._msg[name] = value.get_message() \
+                if isinstance(value, Message) else value
+
+    def __getattr__(self, name):
+        try:
+            return self._msg[name] if not Protobuf.use_pure \
+                else getattr(self._msg, name)
+        except KeyError:
+            raise AttributeError
+
+    def __setitem__(self, name, value):
+        self.__setattr__(name, value)
+
+    def __getitem__(self, name):
+        return self.__getattr__(name)
+
+    def get(self, name, default=None):
+        """Returns the value of an element of the message dictionary.
+
+        Args:
+            name (string): Key name.
+            default (object): The default value if the key does not exists.
+
+        Returns:
+            object: The value of the provided key name.
+        """
+        return self.__dict__["_msg"].get(name, default) \
+            if not Protobuf.use_pure \
+               else getattr(self.__dict__["_msg"], name, default)
+
+    def set_message(self, msg):
+        """Sets the message.
+
+        Args:
+            msg (dict): Dictionary representing a message.
+        """
+        self.__dict__["_msg"] = msg
+
+    def get_message(self):
+        """Returns the dictionary representing a message containing parsed
+        data.
+
+        Returns:
+            dict: The dictionary representing a message containing parsed data.
+        """
+        return self.__dict__["_msg"]
+
+    def serialize_to_string(self):
+        """Serializes a message to a string.
+
+        Returns:
+            str: A string representing a message containing parsed data.
+        """
+        return Protobuf.mysqlxpb.serialize_message(self._msg)
+
+    def serialize_partial_to_string(self):
+        """Serializes the protocol message to a binary string.
+
+        This method is similar to serialize_to_string but doesn't check if the
+        message is initialized.
+
+        Returns:
+            str: A string representation of the partial message.
+        """
+        return Protobuf.mysqlxpb.serialize_partial_message(self._msg)
+
+    @property
+    def type(self):
+        """string: Message type name."""
+        return self._msg["_mysqlxpb_type_name"] if not Protobuf.use_pure \
+            else self._msg.DESCRIPTOR.full_name
+
+    @staticmethod
+    def parse(msg_type_name, payload):
+        """Creates a new message, initialized with parsed data.
+
+        Args:
+            msg_type_name (string): Message type name.
+            payload (string): Serialized message data.
+
+        Returns:
+            dict: The dictionary representing a message containing parsed data.
+
+        .. versionadded:: 8.0.21
+        """
+        return Protobuf.mysqlxpb.parse_message(msg_type_name, payload)
+
+    @staticmethod
+    def byte_size(msg):
+        """Returns the size of the message in bytes.
+
+        Args:
+            msg (mysqlx.protobuf.Message): MySQL X Protobuf Message.
+
+        Returns:
+            int: Size of the message in bytes.
+
+        .. versionadded:: 8.0.21
+        """
+        return msg.ByteSize() if Protobuf.use_pure \
+            else len(encode_to_bytes(msg.serialize_to_string()))
+
+    @staticmethod
+    def parse_from_server(msg_type, payload):
+        """Creates a new server-side message, initialized with parsed data.
+
+        Args:
+            msg_type (int): Message type.
+            payload (string): Serialized message data.
+
+        Returns:
+            dict: The dictionary representing a message containing parsed data.
+        """
+        return Protobuf.mysqlxpb.parse_server_message(msg_type, payload)
+
+    @classmethod
+    def from_message(cls, msg_type_name, payload):
+        """Creates a new message, initialized with parsed data and returns a
+        :class:`mysqlx.protobuf.Message` object.
+
+        Args:
+            msg_type_name (string): Message type name.
+            payload (string): Serialized message data.
+
+        Returns:
+            mysqlx.protobuf.Message: The Message representing a message
+                                     containing parsed data.
+        """
+        msg = cls()
+        msg.set_message(Protobuf.mysqlxpb.parse_message(msg_type_name, payload))
+        return msg
+
+    @classmethod
+    def from_server_message(cls, msg_type, payload):
+        """Creates a new server-side message, initialized with parsed data and
+        returns a :class:`mysqlx.protobuf.Message` object.
+
+        Args:
+            msg_type (int): Message type.
+            payload (string): Serialized message data.
+
+        Returns:
+            mysqlx.protobuf.Message: The Message representing a message
+                                     containing parsed data.
+        """
+        msg = cls()
+        msg.set_message(
+            Protobuf.mysqlxpb.parse_server_message(msg_type, payload))
+        return msg
+
+
+def mysqlxpb_enum(name):
+    """Returns the value of a MySQL X Protobuf enumerator.
+
+    Args:
+        name (string): MySQL X Protobuf numerator name.
+
+    Returns:
+        int: Value of the enumerator.
+    """
+    return Protobuf.mysqlxpb.enum_value(name)
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@@ -0,0 +1,316 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_connection.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from mysqlx.protobuf import mysqlx_datatypes_pb2 as mysqlx__datatypes__pb2
+from mysqlx.protobuf import mysqlx_pb2 as mysqlx__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_connection.proto',
+  package='Mysqlx.Connection',
+  syntax='proto2',
+  serialized_pb=_b('\n\x17mysqlx_connection.proto\x12\x11Mysqlx.Connection\x1a\x16mysqlx_datatypes.proto\x1a\x0cmysqlx.proto\"@\n\nCapability\x12\x0c\n\x04name\x18\x01 \x02(\t\x12$\n\x05value\x18\x02 \x02(\x0b\x32\x15.Mysqlx.Datatypes.Any\"C\n\x0c\x43\x61pabilities\x12\x33\n\x0c\x63\x61pabilities\x18\x01 \x03(\x0b\x32\x1d.Mysqlx.Connection.Capability\"\x11\n\x0f\x43\x61pabilitiesGet\"H\n\x0f\x43\x61pabilitiesSet\x12\x35\n\x0c\x63\x61pabilities\x18\x01 \x02(\x0b\x32\x1f.Mysqlx.Connection.Capabilities\"\x07\n\x05\x43lose\"\xa5\x01\n\x0b\x43ompression\x12\x19\n\x11uncompressed_size\x18\x01 \x01(\x04\x12\x34\n\x0fserver_messages\x18\x02 \x01(\x0e\x32\x1b.Mysqlx.ServerMessages.Type\x12\x34\n\x0f\x63lient_messages\x18\x03 \x01(\x0e\x32\x1b.Mysqlx.ClientMessages.Type\x12\x0f\n\x07payload\x18\x04 \x02(\x0c\x42\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+  ,
+  dependencies=[mysqlx__datatypes__pb2.DESCRIPTOR,mysqlx__pb2.DESCRIPTOR,])
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+
+_CAPABILITY = _descriptor.Descriptor(
+  name='Capability',
+  full_name='Mysqlx.Connection.Capability',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='Mysqlx.Connection.Capability.name', index=0,
+      number=1, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Connection.Capability.value', index=1,
+      number=2, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=84,
+  serialized_end=148,
+)
+
+
+_CAPABILITIES = _descriptor.Descriptor(
+  name='Capabilities',
+  full_name='Mysqlx.Connection.Capabilities',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='capabilities', full_name='Mysqlx.Connection.Capabilities.capabilities', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=150,
+  serialized_end=217,
+)
+
+
+_CAPABILITIESGET = _descriptor.Descriptor(
+  name='CapabilitiesGet',
+  full_name='Mysqlx.Connection.CapabilitiesGet',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=219,
+  serialized_end=236,
+)
+
+
+_CAPABILITIESSET = _descriptor.Descriptor(
+  name='CapabilitiesSet',
+  full_name='Mysqlx.Connection.CapabilitiesSet',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='capabilities', full_name='Mysqlx.Connection.CapabilitiesSet.capabilities', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=238,
+  serialized_end=310,
+)
+
+
+_CLOSE = _descriptor.Descriptor(
+  name='Close',
+  full_name='Mysqlx.Connection.Close',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=312,
+  serialized_end=319,
+)
+
+
+_COMPRESSION = _descriptor.Descriptor(
+  name='Compression',
+  full_name='Mysqlx.Connection.Compression',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='uncompressed_size', full_name='Mysqlx.Connection.Compression.uncompressed_size', index=0,
+      number=1, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='server_messages', full_name='Mysqlx.Connection.Compression.server_messages', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='client_messages', full_name='Mysqlx.Connection.Compression.client_messages', index=2,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='payload', full_name='Mysqlx.Connection.Compression.payload', index=3,
+      number=4, type=12, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=322,
+  serialized_end=487,
+)
+
+_CAPABILITY.fields_by_name['value'].message_type = mysqlx__datatypes__pb2._ANY
+_CAPABILITIES.fields_by_name['capabilities'].message_type = _CAPABILITY
+_CAPABILITIESSET.fields_by_name['capabilities'].message_type = _CAPABILITIES
+_COMPRESSION.fields_by_name['server_messages'].enum_type = mysqlx__pb2._SERVERMESSAGES_TYPE
+_COMPRESSION.fields_by_name['client_messages'].enum_type = mysqlx__pb2._CLIENTMESSAGES_TYPE
+DESCRIPTOR.message_types_by_name['Capability'] = _CAPABILITY
+DESCRIPTOR.message_types_by_name['Capabilities'] = _CAPABILITIES
+DESCRIPTOR.message_types_by_name['CapabilitiesGet'] = _CAPABILITIESGET
+DESCRIPTOR.message_types_by_name['CapabilitiesSet'] = _CAPABILITIESSET
+DESCRIPTOR.message_types_by_name['Close'] = _CLOSE
+DESCRIPTOR.message_types_by_name['Compression'] = _COMPRESSION
+
+Capability = _reflection.GeneratedProtocolMessageType('Capability', (_message.Message,), dict(
+  DESCRIPTOR = _CAPABILITY,
+  __module__ = 'mysqlx_connection_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Connection.Capability)
+  ))
+_sym_db.RegisterMessage(Capability)
+
+Capabilities = _reflection.GeneratedProtocolMessageType('Capabilities', (_message.Message,), dict(
+  DESCRIPTOR = _CAPABILITIES,
+  __module__ = 'mysqlx_connection_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Connection.Capabilities)
+  ))
+_sym_db.RegisterMessage(Capabilities)
+
+CapabilitiesGet = _reflection.GeneratedProtocolMessageType('CapabilitiesGet', (_message.Message,), dict(
+  DESCRIPTOR = _CAPABILITIESGET,
+  __module__ = 'mysqlx_connection_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Connection.CapabilitiesGet)
+  ))
+_sym_db.RegisterMessage(CapabilitiesGet)
+
+CapabilitiesSet = _reflection.GeneratedProtocolMessageType('CapabilitiesSet', (_message.Message,), dict(
+  DESCRIPTOR = _CAPABILITIESSET,
+  __module__ = 'mysqlx_connection_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Connection.CapabilitiesSet)
+  ))
+_sym_db.RegisterMessage(CapabilitiesSet)
+
+Close = _reflection.GeneratedProtocolMessageType('Close', (_message.Message,), dict(
+  DESCRIPTOR = _CLOSE,
+  __module__ = 'mysqlx_connection_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Connection.Close)
+  ))
+_sym_db.RegisterMessage(Close)
+
+Compression = _reflection.GeneratedProtocolMessageType('Compression', (_message.Message,), dict(
+  DESCRIPTOR = _COMPRESSION,
+  __module__ = 'mysqlx_connection_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Connection.Compression)
+  ))
+_sym_db.RegisterMessage(Compression)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_crud_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_crud_pb2.py
new file mode 100644
index 0000000..6c00b8c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_crud_pb2.py
@@ -0,0 +1,1295 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_crud.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from mysqlx.protobuf import mysqlx_expr_pb2 as mysqlx__expr__pb2
+from mysqlx.protobuf import mysqlx_datatypes_pb2 as mysqlx__datatypes__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_crud.proto',
+  package='Mysqlx.Crud',
+  syntax='proto2',
+  serialized_pb=_b('\n\x11mysqlx_crud.proto\x12\x0bMysqlx.Crud\x1a\x11mysqlx_expr.proto\x1a\x16mysqlx_datatypes.proto\"[\n\x06\x43olumn\x12\x0c\n\x04name\x18\x01 \x01(\t\x12\r\n\x05\x61lias\x18\x02 \x01(\t\x12\x34\n\rdocument_path\x18\x03 \x03(\x0b\x32\x1d.Mysqlx.Expr.DocumentPathItem\">\n\nProjection\x12!\n\x06source\x18\x01 \x02(\x0b\x32\x11.Mysqlx.Expr.Expr\x12\r\n\x05\x61lias\x18\x02 \x01(\t\"*\n\nCollection\x12\x0c\n\x04name\x18\x01 \x02(\t\x12\x0e\n\x06schema\x18\x02 \x01(\t\"*\n\x05Limit\x12\x11\n\trow_count\x18\x01 \x02(\x04\x12\x0e\n\x06offset\x18\x02 \x01(\x04\"T\n\tLimitExpr\x12$\n\trow_count\x18\x01 \x02(\x0b\x32\x11.Mysqlx.Expr.Expr\x12!\n\x06offset\x18\x02 \x01(\x0b\x32\x11.Mysqlx.Expr.Expr\"~\n\x05Order\x12\x1f\n\x04\x65xpr\x18\x01 \x02(\x0b\x32\x11.Mysqlx.Expr.Expr\x12\x34\n\tdirection\x18\x02 \x01(\x0e\x32\x1c.Mysqlx.Crud.Order.Direction:\x03\x41SC\"\x1e\n\tDirection\x12\x07\n\x03\x41SC\x10\x01\x12\x08\n\x04\x44\x45SC\x10\x02\"\xac\x02\n\x0fUpdateOperation\x12-\n\x06source\x18\x01 \x02(\x0b\x32\x1d.Mysqlx.Expr.ColumnIdentifier\x12:\n\toperation\x18\x02 \x02(\x0e\x32\'.Mysqlx.Crud.UpdateOperation.UpdateType\x12 \n\x05value\x18\x03 \x01(\x0b\x32\x11.Mysqlx.Expr.Expr\"\x8b\x01\n\nUpdateType\x12\x07\n\x03SET\x10\x01\x12\x0f\n\x0bITEM_REMOVE\x10\x02\x12\x0c\n\x08ITEM_SET\x10\x03\x12\x10\n\x0cITEM_REPLACE\x10\x04\x12\x0e\n\nITEM_MERGE\x10\x05\x12\x10\n\x0c\x41RRAY_INSERT\x10\x06\x12\x10\n\x0c\x41RRAY_APPEND\x10\x07\x12\x0f\n\x0bMERGE_PATCH\x10\x08\"\xe4\x04\n\x04\x46ind\x12+\n\ncollection\x18\x02 \x02(\x0b\x32\x17.Mysqlx.Crud.Collection\x12*\n\ndata_model\x18\x03 \x01(\x0e\x32\x16.Mysqlx.Crud.DataModel\x12+\n\nprojection\x18\x04 \x03(\x0b\x32\x17.Mysqlx.Crud.Projection\x12#\n\x08\x63riteria\x18\x05 \x01(\x0b\x32\x11.Mysqlx.Expr.Expr\x12&\n\x04\x61rgs\x18\x0b \x03(\x0b\x32\x18.Mysqlx.Datatypes.Scalar\x12!\n\x05order\x18\x07 \x03(\x0b\x32\x12.Mysqlx.Crud.Order\x12#\n\x08grouping\x18\x08 \x03(\x0b\x32\x11.Mysqlx.Expr.Expr\x12,\n\x11grouping_criteria\x18\t \x01(\x0b\x32\x11.Mysqlx.Expr.Expr\x12*\n\x07locking\x18\x0c \x01(\x0e\x32\x19.Mysqlx.Crud.Find.RowLock\x12\x39\n\x0flocking_options\x18\r \x01(\x0e\x32 .Mysqlx.Crud.Find.RowLockOptions\x12!\n\x05limit\x18\x06 \x01(\x0b\x32\x12.Mysqlx.Crud.Limit\x12*\n\nlimit_expr\x18\x0e \x01(\x0b\x32\x16.Mysqlx.Crud.LimitExpr\".\n\x07RowLock\x12\x0f\n\x0bSHARED_LOCK\x10\x01\x12\x12\n\x0e\x45XCLUSIVE_LOCK\x10\x02\"-\n\x0eRowLockOptions\x12\n\n\x06NOWAIT\x10\x01\x12\x0f\n\x0bSKIP_LOCKED\x10\x02\"\xa2\x02\n\x06Insert\x12+\n\ncollection\x18\x01 \x02(\x0b\x32\x17.Mysqlx.Crud.Collection\x12*\n\ndata_model\x18\x02 \x01(\x0e\x32\x16.Mysqlx.Crud.DataModel\x12\'\n\nprojection\x18\x03 \x03(\x0b\x32\x13.Mysqlx.Crud.Column\x12)\n\x03row\x18\x04 \x03(\x0b\x32\x1c.Mysqlx.Crud.Insert.TypedRow\x12&\n\x04\x61rgs\x18\x05 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\x03(\x0b\x32\x18.Mysqlx.Datatypes.Scalar\x12!\n\x05order\x18\x05 \x03(\x0b\x32\x12.Mysqlx.Crud.Order\x12!\n\x05limit\x18\x04 \x01(\x0b\x32\x12.Mysqlx.Crud.Limit\x12*\n\nlimit_expr\x18\x07 \x01(\x0b\x32\x16.Mysqlx.Crud.LimitExpr\"\xbc\x02\n\nCreateView\x12+\n\ncollection\x18\x01 \x02(\x0b\x32\x17.Mysqlx.Crud.Collection\x12\x0f\n\x07\x64\x65\x66iner\x18\x02 \x01(\t\x12\x38\n\talgorithm\x18\x03 \x01(\x0e\x32\x1a.Mysqlx.Crud.ViewAlgorithm:\tUNDEFINED\x12\x37\n\x08security\x18\x04 \x01(\x0e\x32\x1c.Mysqlx.Crud.ViewSqlSecurity:\x07\x44\x45\x46INER\x12+\n\x05\x63heck\x18\x05 \x01(\x0e\x32\x1c.Mysqlx.Crud.ViewCheckOption\x12\x0e\n\x06\x63olumn\x18\x06 \x03(\t\x12\x1f\n\x04stmt\x18\x07 \x02(\x0b\x32\x11.Mysqlx.Crud.Find\x12\x1f\n\x10replace_existing\x18\x08 \x01(\x08:\x05\x66\x61lse\"\x87\x02\n\nModifyView\x12+\n\ncollection\x18\x01 \x02(\x0b\x32\x17.Mysqlx.Crud.Collection\x12\x0f\n\x07\x64\x65\x66iner\x18\x02 \x01(\t\x12-\n\talgorithm\x18\x03 \x01(\x0e\x32\x1a.Mysqlx.Crud.ViewAlgorithm\x12.\n\x08security\x18\x04 \x01(\x0e\x32\x1c.Mysqlx.Crud.ViewSqlSecurity\x12+\n\x05\x63heck\x18\x05 \x01(\x0e\x32\x1c.Mysqlx.Crud.ViewCheckOption\x12\x0e\n\x06\x63olumn\x18\x06 \x03(\t\x12\x1f\n\x04stmt\x18\x07 \x01(\x0b\x32\x11.Mysqlx.Crud.Find\"Q\n\x08\x44ropView\x12+\n\ncollection\x18\x01 \x02(\x0b\x32\x17.Mysqlx.Crud.Collection\x12\x18\n\tif_exists\x18\x02 \x01(\x08:\x05\x66\x61lse*$\n\tDataModel\x12\x0c\n\x08\x44OCUMENT\x10\x01\x12\t\n\x05TABLE\x10\x02*8\n\rViewAlgorithm\x12\r\n\tUNDEFINED\x10\x01\x12\t\n\x05MERGE\x10\x02\x12\r\n\tTEMPTABLE\x10\x03*+\n\x0fViewSqlSecurity\x12\x0b\n\x07INVOKER\x10\x01\x12\x0b\n\x07\x44\x45\x46INER\x10\x02**\n\x0fViewCheckOption\x12\t\n\x05LOCAL\x10\x01\x12\x0c\n\x08\x43\x41SCADED\x10\x02\x42\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+  ,
+  dependencies=[mysqlx__expr__pb2.DESCRIPTOR,mysqlx__datatypes__pb2.DESCRIPTOR,])
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+_DATAMODEL = _descriptor.EnumDescriptor(
+  name='DataModel',
+  full_name='Mysqlx.Crud.DataModel',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='DOCUMENT', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='TABLE', index=1, number=2,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=3046,
+  serialized_end=3082,
+)
+_sym_db.RegisterEnumDescriptor(_DATAMODEL)
+
+DataModel = enum_type_wrapper.EnumTypeWrapper(_DATAMODEL)
+_VIEWALGORITHM = _descriptor.EnumDescriptor(
+  name='ViewAlgorithm',
+  full_name='Mysqlx.Crud.ViewAlgorithm',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='UNDEFINED', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='MERGE', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='TEMPTABLE', index=2, number=3,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=3084,
+  serialized_end=3140,
+)
+_sym_db.RegisterEnumDescriptor(_VIEWALGORITHM)
+
+ViewAlgorithm = enum_type_wrapper.EnumTypeWrapper(_VIEWALGORITHM)
+_VIEWSQLSECURITY = _descriptor.EnumDescriptor(
+  name='ViewSqlSecurity',
+  full_name='Mysqlx.Crud.ViewSqlSecurity',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='INVOKER', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='DEFINER', index=1, number=2,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=3142,
+  serialized_end=3185,
+)
+_sym_db.RegisterEnumDescriptor(_VIEWSQLSECURITY)
+
+ViewSqlSecurity = enum_type_wrapper.EnumTypeWrapper(_VIEWSQLSECURITY)
+_VIEWCHECKOPTION = _descriptor.EnumDescriptor(
+  name='ViewCheckOption',
+  full_name='Mysqlx.Crud.ViewCheckOption',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='LOCAL', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CASCADED', index=1, number=2,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=3187,
+  serialized_end=3229,
+)
+_sym_db.RegisterEnumDescriptor(_VIEWCHECKOPTION)
+
+ViewCheckOption = enum_type_wrapper.EnumTypeWrapper(_VIEWCHECKOPTION)
+DOCUMENT = 1
+TABLE = 2
+UNDEFINED = 1
+MERGE = 2
+TEMPTABLE = 3
+INVOKER = 1
+DEFINER = 2
+LOCAL = 1
+CASCADED = 2
+
+
+_ORDER_DIRECTION = _descriptor.EnumDescriptor(
+  name='Direction',
+  full_name='Mysqlx.Crud.Order.Direction',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='ASC', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='DESC', index=1, number=2,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=504,
+  serialized_end=534,
+)
+_sym_db.RegisterEnumDescriptor(_ORDER_DIRECTION)
+
+_UPDATEOPERATION_UPDATETYPE = _descriptor.EnumDescriptor(
+  name='UpdateType',
+  full_name='Mysqlx.Crud.UpdateOperation.UpdateType',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='SET', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ITEM_REMOVE', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ITEM_SET', index=2, number=3,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ITEM_REPLACE', index=3, number=4,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ITEM_MERGE', index=4, number=5,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ARRAY_INSERT', index=5, number=6,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ARRAY_APPEND', index=6, number=7,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='MERGE_PATCH', index=7, number=8,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=698,
+  serialized_end=837,
+)
+_sym_db.RegisterEnumDescriptor(_UPDATEOPERATION_UPDATETYPE)
+
+_FIND_ROWLOCK = _descriptor.EnumDescriptor(
+  name='RowLock',
+  full_name='Mysqlx.Crud.Find.RowLock',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='SHARED_LOCK', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='EXCLUSIVE_LOCK', index=1, number=2,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=1359,
+  serialized_end=1405,
+)
+_sym_db.RegisterEnumDescriptor(_FIND_ROWLOCK)
+
+_FIND_ROWLOCKOPTIONS = _descriptor.EnumDescriptor(
+  name='RowLockOptions',
+  full_name='Mysqlx.Crud.Find.RowLockOptions',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='NOWAIT', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SKIP_LOCKED', index=1, number=2,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=1407,
+  serialized_end=1452,
+)
+_sym_db.RegisterEnumDescriptor(_FIND_ROWLOCKOPTIONS)
+
+
+_COLUMN = _descriptor.Descriptor(
+  name='Column',
+  full_name='Mysqlx.Crud.Column',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='Mysqlx.Crud.Column.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='alias', full_name='Mysqlx.Crud.Column.alias', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='document_path', full_name='Mysqlx.Crud.Column.document_path', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=77,
+  serialized_end=168,
+)
+
+
+_PROJECTION = _descriptor.Descriptor(
+  name='Projection',
+  full_name='Mysqlx.Crud.Projection',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='source', full_name='Mysqlx.Crud.Projection.source', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='alias', full_name='Mysqlx.Crud.Projection.alias', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=170,
+  serialized_end=232,
+)
+
+
+_COLLECTION = _descriptor.Descriptor(
+  name='Collection',
+  full_name='Mysqlx.Crud.Collection',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='Mysqlx.Crud.Collection.name', index=0,
+      number=1, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='schema', full_name='Mysqlx.Crud.Collection.schema', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=234,
+  serialized_end=276,
+)
+
+
+_LIMIT = _descriptor.Descriptor(
+  name='Limit',
+  full_name='Mysqlx.Crud.Limit',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='row_count', full_name='Mysqlx.Crud.Limit.row_count', index=0,
+      number=1, type=4, cpp_type=4, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='offset', full_name='Mysqlx.Crud.Limit.offset', index=1,
+      number=2, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=278,
+  serialized_end=320,
+)
+
+
+_LIMITEXPR = _descriptor.Descriptor(
+  name='LimitExpr',
+  full_name='Mysqlx.Crud.LimitExpr',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='row_count', full_name='Mysqlx.Crud.LimitExpr.row_count', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='offset', full_name='Mysqlx.Crud.LimitExpr.offset', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=322,
+  serialized_end=406,
+)
+
+
+_ORDER = _descriptor.Descriptor(
+  name='Order',
+  full_name='Mysqlx.Crud.Order',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='expr', full_name='Mysqlx.Crud.Order.expr', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='direction', full_name='Mysqlx.Crud.Order.direction', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _ORDER_DIRECTION,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=408,
+  serialized_end=534,
+)
+
+
+_UPDATEOPERATION = _descriptor.Descriptor(
+  name='UpdateOperation',
+  full_name='Mysqlx.Crud.UpdateOperation',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='source', full_name='Mysqlx.Crud.UpdateOperation.source', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='operation', full_name='Mysqlx.Crud.UpdateOperation.operation', index=1,
+      number=2, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Crud.UpdateOperation.value', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _UPDATEOPERATION_UPDATETYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=537,
+  serialized_end=837,
+)
+
+
+_FIND = _descriptor.Descriptor(
+  name='Find',
+  full_name='Mysqlx.Crud.Find',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='collection', full_name='Mysqlx.Crud.Find.collection', index=0,
+      number=2, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='data_model', full_name='Mysqlx.Crud.Find.data_model', index=1,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='projection', full_name='Mysqlx.Crud.Find.projection', index=2,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='criteria', full_name='Mysqlx.Crud.Find.criteria', index=3,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='args', full_name='Mysqlx.Crud.Find.args', index=4,
+      number=11, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='order', full_name='Mysqlx.Crud.Find.order', index=5,
+      number=7, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='grouping', full_name='Mysqlx.Crud.Find.grouping', index=6,
+      number=8, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='grouping_criteria', full_name='Mysqlx.Crud.Find.grouping_criteria', index=7,
+      number=9, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='locking', full_name='Mysqlx.Crud.Find.locking', index=8,
+      number=12, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='locking_options', full_name='Mysqlx.Crud.Find.locking_options', index=9,
+      number=13, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='limit', full_name='Mysqlx.Crud.Find.limit', index=10,
+      number=6, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='limit_expr', full_name='Mysqlx.Crud.Find.limit_expr', index=11,
+      number=14, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _FIND_ROWLOCK,
+    _FIND_ROWLOCKOPTIONS,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=840,
+  serialized_end=1452,
+)
+
+
+_INSERT_TYPEDROW = _descriptor.Descriptor(
+  name='TypedRow',
+  full_name='Mysqlx.Crud.Insert.TypedRow',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field', full_name='Mysqlx.Crud.Insert.TypedRow.field', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1701,
+  serialized_end=1745,
+)
+
+_INSERT = _descriptor.Descriptor(
+  name='Insert',
+  full_name='Mysqlx.Crud.Insert',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='collection', full_name='Mysqlx.Crud.Insert.collection', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='data_model', full_name='Mysqlx.Crud.Insert.data_model', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='projection', full_name='Mysqlx.Crud.Insert.projection', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='row', full_name='Mysqlx.Crud.Insert.row', index=3,
+      number=4, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='args', full_name='Mysqlx.Crud.Insert.args', index=4,
+      number=5, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='upsert', full_name='Mysqlx.Crud.Insert.upsert', index=5,
+      number=6, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[_INSERT_TYPEDROW, ],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1455,
+  serialized_end=1745,
+)
+
+
+_UPDATE = _descriptor.Descriptor(
+  name='Update',
+  full_name='Mysqlx.Crud.Update',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='collection', full_name='Mysqlx.Crud.Update.collection', index=0,
+      number=2, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='data_model', full_name='Mysqlx.Crud.Update.data_model', index=1,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='criteria', full_name='Mysqlx.Crud.Update.criteria', index=2,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='args', full_name='Mysqlx.Crud.Update.args', index=3,
+      number=8, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='order', full_name='Mysqlx.Crud.Update.order', index=4,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='operation', full_name='Mysqlx.Crud.Update.operation', index=5,
+      number=7, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='limit', full_name='Mysqlx.Crud.Update.limit', index=6,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='limit_expr', full_name='Mysqlx.Crud.Update.limit_expr', index=7,
+      number=9, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1748,
+  serialized_end=2085,
+)
+
+
+_DELETE = _descriptor.Descriptor(
+  name='Delete',
+  full_name='Mysqlx.Crud.Delete',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='collection', full_name='Mysqlx.Crud.Delete.collection', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='data_model', full_name='Mysqlx.Crud.Delete.data_model', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='criteria', full_name='Mysqlx.Crud.Delete.criteria', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='args', full_name='Mysqlx.Crud.Delete.args', index=3,
+      number=6, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='order', full_name='Mysqlx.Crud.Delete.order', index=4,
+      number=5, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='limit', full_name='Mysqlx.Crud.Delete.limit', index=5,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='limit_expr', full_name='Mysqlx.Crud.Delete.limit_expr', index=6,
+      number=7, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2088,
+  serialized_end=2376,
+)
+
+
+_CREATEVIEW = _descriptor.Descriptor(
+  name='CreateView',
+  full_name='Mysqlx.Crud.CreateView',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='collection', full_name='Mysqlx.Crud.CreateView.collection', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='definer', full_name='Mysqlx.Crud.CreateView.definer', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='algorithm', full_name='Mysqlx.Crud.CreateView.algorithm', index=2,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='security', full_name='Mysqlx.Crud.CreateView.security', index=3,
+      number=4, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=2,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='check', full_name='Mysqlx.Crud.CreateView.check', index=4,
+      number=5, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='column', full_name='Mysqlx.Crud.CreateView.column', index=5,
+      number=6, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='stmt', full_name='Mysqlx.Crud.CreateView.stmt', index=6,
+      number=7, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='replace_existing', full_name='Mysqlx.Crud.CreateView.replace_existing', index=7,
+      number=8, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2379,
+  serialized_end=2695,
+)
+
+
+_MODIFYVIEW = _descriptor.Descriptor(
+  name='ModifyView',
+  full_name='Mysqlx.Crud.ModifyView',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='collection', full_name='Mysqlx.Crud.ModifyView.collection', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='definer', full_name='Mysqlx.Crud.ModifyView.definer', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='algorithm', full_name='Mysqlx.Crud.ModifyView.algorithm', index=2,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='security', full_name='Mysqlx.Crud.ModifyView.security', index=3,
+      number=4, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='check', full_name='Mysqlx.Crud.ModifyView.check', index=4,
+      number=5, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='column', full_name='Mysqlx.Crud.ModifyView.column', index=5,
+      number=6, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='stmt', full_name='Mysqlx.Crud.ModifyView.stmt', index=6,
+      number=7, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2698,
+  serialized_end=2961,
+)
+
+
+_DROPVIEW = _descriptor.Descriptor(
+  name='DropView',
+  full_name='Mysqlx.Crud.DropView',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='collection', full_name='Mysqlx.Crud.DropView.collection', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='if_exists', full_name='Mysqlx.Crud.DropView.if_exists', index=1,
+      number=2, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=2963,
+  serialized_end=3044,
+)
+
+_COLUMN.fields_by_name['document_path'].message_type = mysqlx__expr__pb2._DOCUMENTPATHITEM
+_PROJECTION.fields_by_name['source'].message_type = mysqlx__expr__pb2._EXPR
+_LIMITEXPR.fields_by_name['row_count'].message_type = mysqlx__expr__pb2._EXPR
+_LIMITEXPR.fields_by_name['offset'].message_type = mysqlx__expr__pb2._EXPR
+_ORDER.fields_by_name['expr'].message_type = mysqlx__expr__pb2._EXPR
+_ORDER.fields_by_name['direction'].enum_type = _ORDER_DIRECTION
+_ORDER_DIRECTION.containing_type = _ORDER
+_UPDATEOPERATION.fields_by_name['source'].message_type = mysqlx__expr__pb2._COLUMNIDENTIFIER
+_UPDATEOPERATION.fields_by_name['operation'].enum_type = _UPDATEOPERATION_UPDATETYPE
+_UPDATEOPERATION.fields_by_name['value'].message_type = mysqlx__expr__pb2._EXPR
+_UPDATEOPERATION_UPDATETYPE.containing_type = _UPDATEOPERATION
+_FIND.fields_by_name['collection'].message_type = _COLLECTION
+_FIND.fields_by_name['data_model'].enum_type = _DATAMODEL
+_FIND.fields_by_name['projection'].message_type = _PROJECTION
+_FIND.fields_by_name['criteria'].message_type = mysqlx__expr__pb2._EXPR
+_FIND.fields_by_name['args'].message_type = mysqlx__datatypes__pb2._SCALAR
+_FIND.fields_by_name['order'].message_type = _ORDER
+_FIND.fields_by_name['grouping'].message_type = mysqlx__expr__pb2._EXPR
+_FIND.fields_by_name['grouping_criteria'].message_type = mysqlx__expr__pb2._EXPR
+_FIND.fields_by_name['locking'].enum_type = _FIND_ROWLOCK
+_FIND.fields_by_name['locking_options'].enum_type = _FIND_ROWLOCKOPTIONS
+_FIND.fields_by_name['limit'].message_type = _LIMIT
+_FIND.fields_by_name['limit_expr'].message_type = _LIMITEXPR
+_FIND_ROWLOCK.containing_type = _FIND
+_FIND_ROWLOCKOPTIONS.containing_type = _FIND
+_INSERT_TYPEDROW.fields_by_name['field'].message_type = mysqlx__expr__pb2._EXPR
+_INSERT_TYPEDROW.containing_type = _INSERT
+_INSERT.fields_by_name['collection'].message_type = _COLLECTION
+_INSERT.fields_by_name['data_model'].enum_type = _DATAMODEL
+_INSERT.fields_by_name['projection'].message_type = _COLUMN
+_INSERT.fields_by_name['row'].message_type = _INSERT_TYPEDROW
+_INSERT.fields_by_name['args'].message_type = mysqlx__datatypes__pb2._SCALAR
+_UPDATE.fields_by_name['collection'].message_type = _COLLECTION
+_UPDATE.fields_by_name['data_model'].enum_type = _DATAMODEL
+_UPDATE.fields_by_name['criteria'].message_type = mysqlx__expr__pb2._EXPR
+_UPDATE.fields_by_name['args'].message_type = mysqlx__datatypes__pb2._SCALAR
+_UPDATE.fields_by_name['order'].message_type = _ORDER
+_UPDATE.fields_by_name['operation'].message_type = _UPDATEOPERATION
+_UPDATE.fields_by_name['limit'].message_type = _LIMIT
+_UPDATE.fields_by_name['limit_expr'].message_type = _LIMITEXPR
+_DELETE.fields_by_name['collection'].message_type = _COLLECTION
+_DELETE.fields_by_name['data_model'].enum_type = _DATAMODEL
+_DELETE.fields_by_name['criteria'].message_type = mysqlx__expr__pb2._EXPR
+_DELETE.fields_by_name['args'].message_type = mysqlx__datatypes__pb2._SCALAR
+_DELETE.fields_by_name['order'].message_type = _ORDER
+_DELETE.fields_by_name['limit'].message_type = _LIMIT
+_DELETE.fields_by_name['limit_expr'].message_type = _LIMITEXPR
+_CREATEVIEW.fields_by_name['collection'].message_type = _COLLECTION
+_CREATEVIEW.fields_by_name['algorithm'].enum_type = _VIEWALGORITHM
+_CREATEVIEW.fields_by_name['security'].enum_type = _VIEWSQLSECURITY
+_CREATEVIEW.fields_by_name['check'].enum_type = _VIEWCHECKOPTION
+_CREATEVIEW.fields_by_name['stmt'].message_type = _FIND
+_MODIFYVIEW.fields_by_name['collection'].message_type = _COLLECTION
+_MODIFYVIEW.fields_by_name['algorithm'].enum_type = _VIEWALGORITHM
+_MODIFYVIEW.fields_by_name['security'].enum_type = _VIEWSQLSECURITY
+_MODIFYVIEW.fields_by_name['check'].enum_type = _VIEWCHECKOPTION
+_MODIFYVIEW.fields_by_name['stmt'].message_type = _FIND
+_DROPVIEW.fields_by_name['collection'].message_type = _COLLECTION
+DESCRIPTOR.message_types_by_name['Column'] = _COLUMN
+DESCRIPTOR.message_types_by_name['Projection'] = _PROJECTION
+DESCRIPTOR.message_types_by_name['Collection'] = _COLLECTION
+DESCRIPTOR.message_types_by_name['Limit'] = _LIMIT
+DESCRIPTOR.message_types_by_name['LimitExpr'] = _LIMITEXPR
+DESCRIPTOR.message_types_by_name['Order'] = _ORDER
+DESCRIPTOR.message_types_by_name['UpdateOperation'] = _UPDATEOPERATION
+DESCRIPTOR.message_types_by_name['Find'] = _FIND
+DESCRIPTOR.message_types_by_name['Insert'] = _INSERT
+DESCRIPTOR.message_types_by_name['Update'] = _UPDATE
+DESCRIPTOR.message_types_by_name['Delete'] = _DELETE
+DESCRIPTOR.message_types_by_name['CreateView'] = _CREATEVIEW
+DESCRIPTOR.message_types_by_name['ModifyView'] = _MODIFYVIEW
+DESCRIPTOR.message_types_by_name['DropView'] = _DROPVIEW
+DESCRIPTOR.enum_types_by_name['DataModel'] = _DATAMODEL
+DESCRIPTOR.enum_types_by_name['ViewAlgorithm'] = _VIEWALGORITHM
+DESCRIPTOR.enum_types_by_name['ViewSqlSecurity'] = _VIEWSQLSECURITY
+DESCRIPTOR.enum_types_by_name['ViewCheckOption'] = _VIEWCHECKOPTION
+
+Column = _reflection.GeneratedProtocolMessageType('Column', (_message.Message,), dict(
+  DESCRIPTOR = _COLUMN,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.Column)
+  ))
+_sym_db.RegisterMessage(Column)
+
+Projection = _reflection.GeneratedProtocolMessageType('Projection', (_message.Message,), dict(
+  DESCRIPTOR = _PROJECTION,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.Projection)
+  ))
+_sym_db.RegisterMessage(Projection)
+
+Collection = _reflection.GeneratedProtocolMessageType('Collection', (_message.Message,), dict(
+  DESCRIPTOR = _COLLECTION,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.Collection)
+  ))
+_sym_db.RegisterMessage(Collection)
+
+Limit = _reflection.GeneratedProtocolMessageType('Limit', (_message.Message,), dict(
+  DESCRIPTOR = _LIMIT,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.Limit)
+  ))
+_sym_db.RegisterMessage(Limit)
+
+LimitExpr = _reflection.GeneratedProtocolMessageType('LimitExpr', (_message.Message,), dict(
+  DESCRIPTOR = _LIMITEXPR,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.LimitExpr)
+  ))
+_sym_db.RegisterMessage(LimitExpr)
+
+Order = _reflection.GeneratedProtocolMessageType('Order', (_message.Message,), dict(
+  DESCRIPTOR = _ORDER,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.Order)
+  ))
+_sym_db.RegisterMessage(Order)
+
+UpdateOperation = _reflection.GeneratedProtocolMessageType('UpdateOperation', (_message.Message,), dict(
+  DESCRIPTOR = _UPDATEOPERATION,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.UpdateOperation)
+  ))
+_sym_db.RegisterMessage(UpdateOperation)
+
+Find = _reflection.GeneratedProtocolMessageType('Find', (_message.Message,), dict(
+  DESCRIPTOR = _FIND,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.Find)
+  ))
+_sym_db.RegisterMessage(Find)
+
+Insert = _reflection.GeneratedProtocolMessageType('Insert', (_message.Message,), dict(
+
+  TypedRow = _reflection.GeneratedProtocolMessageType('TypedRow', (_message.Message,), dict(
+    DESCRIPTOR = _INSERT_TYPEDROW,
+    __module__ = 'mysqlx_crud_pb2'
+    # @@protoc_insertion_point(class_scope:Mysqlx.Crud.Insert.TypedRow)
+    ))
+  ,
+  DESCRIPTOR = _INSERT,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.Insert)
+  ))
+_sym_db.RegisterMessage(Insert)
+_sym_db.RegisterMessage(Insert.TypedRow)
+
+Update = _reflection.GeneratedProtocolMessageType('Update', (_message.Message,), dict(
+  DESCRIPTOR = _UPDATE,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.Update)
+  ))
+_sym_db.RegisterMessage(Update)
+
+Delete = _reflection.GeneratedProtocolMessageType('Delete', (_message.Message,), dict(
+  DESCRIPTOR = _DELETE,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.Delete)
+  ))
+_sym_db.RegisterMessage(Delete)
+
+CreateView = _reflection.GeneratedProtocolMessageType('CreateView', (_message.Message,), dict(
+  DESCRIPTOR = _CREATEVIEW,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.CreateView)
+  ))
+_sym_db.RegisterMessage(CreateView)
+
+ModifyView = _reflection.GeneratedProtocolMessageType('ModifyView', (_message.Message,), dict(
+  DESCRIPTOR = _MODIFYVIEW,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.ModifyView)
+  ))
+_sym_db.RegisterMessage(ModifyView)
+
+DropView = _reflection.GeneratedProtocolMessageType('DropView', (_message.Message,), dict(
+  DESCRIPTOR = _DROPVIEW,
+  __module__ = 'mysqlx_crud_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Crud.DropView)
+  ))
+_sym_db.RegisterMessage(DropView)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_cursor_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_cursor_pb2.py
new file mode 100644
index 0000000..e74d25c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_cursor_pb2.py
@@ -0,0 +1,269 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_cursor.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from mysqlx.protobuf import mysqlx_prepare_pb2 as mysqlx__prepare__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_cursor.proto',
+  package='Mysqlx.Cursor',
+  syntax='proto2',
+  serialized_pb=_b('\n\x13mysqlx_cursor.proto\x12\rMysqlx.Cursor\x1a\x14mysqlx_prepare.proto\"\xf2\x01\n\x04Open\x12\x11\n\tcursor_id\x18\x01 \x02(\r\x12.\n\x04stmt\x18\x04 \x02(\x0b\x32 .Mysqlx.Cursor.Open.OneOfMessage\x12\x12\n\nfetch_rows\x18\x05 \x01(\x04\x1a\x92\x01\n\x0cOneOfMessage\x12\x33\n\x04type\x18\x01 \x02(\x0e\x32%.Mysqlx.Cursor.Open.OneOfMessage.Type\x12\x30\n\x0fprepare_execute\x18\x02 \x01(\x0b\x32\x17.Mysqlx.Prepare.Execute\"\x1b\n\x04Type\x12\x13\n\x0fPREPARE_EXECUTE\x10\x00\".\n\x05\x46\x65tch\x12\x11\n\tcursor_id\x18\x01 \x02(\r\x12\x12\n\nfetch_rows\x18\x05 \x01(\x04\"\x1a\n\x05\x43lose\x12\x11\n\tcursor_id\x18\x01 \x02(\rB\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+  ,
+  dependencies=[mysqlx__prepare__pb2.DESCRIPTOR,])
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+_OPEN_ONEOFMESSAGE_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='Mysqlx.Cursor.Open.OneOfMessage.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='PREPARE_EXECUTE', index=0, number=0,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=276,
+  serialized_end=303,
+)
+_sym_db.RegisterEnumDescriptor(_OPEN_ONEOFMESSAGE_TYPE)
+
+
+_OPEN_ONEOFMESSAGE = _descriptor.Descriptor(
+  name='OneOfMessage',
+  full_name='Mysqlx.Cursor.Open.OneOfMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='Mysqlx.Cursor.Open.OneOfMessage.type', index=0,
+      number=1, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='prepare_execute', full_name='Mysqlx.Cursor.Open.OneOfMessage.prepare_execute', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _OPEN_ONEOFMESSAGE_TYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=157,
+  serialized_end=303,
+)
+
+_OPEN = _descriptor.Descriptor(
+  name='Open',
+  full_name='Mysqlx.Cursor.Open',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='cursor_id', full_name='Mysqlx.Cursor.Open.cursor_id', index=0,
+      number=1, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='stmt', full_name='Mysqlx.Cursor.Open.stmt', index=1,
+      number=4, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='fetch_rows', full_name='Mysqlx.Cursor.Open.fetch_rows', index=2,
+      number=5, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[_OPEN_ONEOFMESSAGE, ],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=61,
+  serialized_end=303,
+)
+
+
+_FETCH = _descriptor.Descriptor(
+  name='Fetch',
+  full_name='Mysqlx.Cursor.Fetch',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='cursor_id', full_name='Mysqlx.Cursor.Fetch.cursor_id', index=0,
+      number=1, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='fetch_rows', full_name='Mysqlx.Cursor.Fetch.fetch_rows', index=1,
+      number=5, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=305,
+  serialized_end=351,
+)
+
+
+_CLOSE = _descriptor.Descriptor(
+  name='Close',
+  full_name='Mysqlx.Cursor.Close',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='cursor_id', full_name='Mysqlx.Cursor.Close.cursor_id', index=0,
+      number=1, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=353,
+  serialized_end=379,
+)
+
+_OPEN_ONEOFMESSAGE.fields_by_name['type'].enum_type = _OPEN_ONEOFMESSAGE_TYPE
+_OPEN_ONEOFMESSAGE.fields_by_name['prepare_execute'].message_type = mysqlx__prepare__pb2._EXECUTE
+_OPEN_ONEOFMESSAGE.containing_type = _OPEN
+_OPEN_ONEOFMESSAGE_TYPE.containing_type = _OPEN_ONEOFMESSAGE
+_OPEN.fields_by_name['stmt'].message_type = _OPEN_ONEOFMESSAGE
+DESCRIPTOR.message_types_by_name['Open'] = _OPEN
+DESCRIPTOR.message_types_by_name['Fetch'] = _FETCH
+DESCRIPTOR.message_types_by_name['Close'] = _CLOSE
+
+Open = _reflection.GeneratedProtocolMessageType('Open', (_message.Message,), dict(
+
+  OneOfMessage = _reflection.GeneratedProtocolMessageType('OneOfMessage', (_message.Message,), dict(
+    DESCRIPTOR = _OPEN_ONEOFMESSAGE,
+    __module__ = 'mysqlx_cursor_pb2'
+    # @@protoc_insertion_point(class_scope:Mysqlx.Cursor.Open.OneOfMessage)
+    ))
+  ,
+  DESCRIPTOR = _OPEN,
+  __module__ = 'mysqlx_cursor_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Cursor.Open)
+  ))
+_sym_db.RegisterMessage(Open)
+_sym_db.RegisterMessage(Open.OneOfMessage)
+
+Fetch = _reflection.GeneratedProtocolMessageType('Fetch', (_message.Message,), dict(
+  DESCRIPTOR = _FETCH,
+  __module__ = 'mysqlx_cursor_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Cursor.Fetch)
+  ))
+_sym_db.RegisterMessage(Fetch)
+
+Close = _reflection.GeneratedProtocolMessageType('Close', (_message.Message,), dict(
+  DESCRIPTOR = _CLOSE,
+  __module__ = 'mysqlx_cursor_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Cursor.Close)
+  ))
+_sym_db.RegisterMessage(Close)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_datatypes_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_datatypes_pb2.py
new file mode 100644
index 0000000..d343bca
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_datatypes_pb2.py
@@ -0,0 +1,510 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_datatypes.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_datatypes.proto',
+  package='Mysqlx.Datatypes',
+  syntax='proto2',
+  serialized_pb=_b('\n\x16mysqlx_datatypes.proto\x12\x10Mysqlx.Datatypes\"\xc6\x03\n\x06Scalar\x12+\n\x04type\x18\x01 \x02(\x0e\x32\x1d.Mysqlx.Datatypes.Scalar.Type\x12\x14\n\x0cv_signed_int\x18\x02 \x01(\x12\x12\x16\n\x0ev_unsigned_int\x18\x03 \x01(\x04\x12\x31\n\x08v_octets\x18\x05 \x01(\x0b\x32\x1f.Mysqlx.Datatypes.Scalar.Octets\x12\x10\n\x08v_double\x18\x06 \x01(\x01\x12\x0f\n\x07v_float\x18\x07 \x01(\x02\x12\x0e\n\x06v_bool\x18\x08 \x01(\x08\x12\x31\n\x08v_string\x18\t \x01(\x0b\x32\x1f.Mysqlx.Datatypes.Scalar.String\x1a*\n\x06String\x12\r\n\x05value\x18\x01 \x02(\x0c\x12\x11\n\tcollation\x18\x02 \x01(\x04\x1a-\n\x06Octets\x12\r\n\x05value\x18\x01 \x02(\x0c\x12\x14\n\x0c\x63ontent_type\x18\x02 \x01(\r\"m\n\x04Type\x12\n\n\x06V_SINT\x10\x01\x12\n\n\x06V_UINT\x10\x02\x12\n\n\x06V_NULL\x10\x03\x12\x0c\n\x08V_OCTETS\x10\x04\x12\x0c\n\x08V_DOUBLE\x10\x05\x12\x0b\n\x07V_FLOAT\x10\x06\x12\n\n\x06V_BOOL\x10\x07\x12\x0c\n\x08V_STRING\x10\x08\"}\n\x06Object\x12\x31\n\x03\x66ld\x18\x01 \x03(\x0b\x32$.Mysqlx.Datatypes.Object.ObjectField\x1a@\n\x0bObjectField\x12\x0b\n\x03key\x18\x01 \x02(\t\x12$\n\x05value\x18\x02 \x02(\x0b\x32\x15.Mysqlx.Datatypes.Any\"-\n\x05\x41rray\x12$\n\x05value\x18\x01 \x03(\x0b\x32\x15.Mysqlx.Datatypes.Any\"\xd3\x01\n\x03\x41ny\x12(\n\x04type\x18\x01 \x02(\x0e\x32\x1a.Mysqlx.Datatypes.Any.Type\x12(\n\x06scalar\x18\x02 \x01(\x0b\x32\x18.Mysqlx.Datatypes.Scalar\x12%\n\x03obj\x18\x03 \x01(\x0b\x32\x18.Mysqlx.Datatypes.Object\x12&\n\x05\x61rray\x18\x04 \x01(\x0b\x32\x17.Mysqlx.Datatypes.Array\")\n\x04Type\x12\n\n\x06SCALAR\x10\x01\x12\n\n\x06OBJECT\x10\x02\x12\t\n\x05\x41RRAY\x10\x03\x42\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+)
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+_SCALAR_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='Mysqlx.Datatypes.Scalar.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='V_SINT', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='V_UINT', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='V_NULL', index=2, number=3,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='V_OCTETS', index=3, number=4,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='V_DOUBLE', index=4, number=5,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='V_FLOAT', index=5, number=6,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='V_BOOL', index=6, number=7,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='V_STRING', index=7, number=8,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=390,
+  serialized_end=499,
+)
+_sym_db.RegisterEnumDescriptor(_SCALAR_TYPE)
+
+_ANY_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='Mysqlx.Datatypes.Any.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='SCALAR', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='OBJECT', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ARRAY', index=2, number=3,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=846,
+  serialized_end=887,
+)
+_sym_db.RegisterEnumDescriptor(_ANY_TYPE)
+
+
+_SCALAR_STRING = _descriptor.Descriptor(
+  name='String',
+  full_name='Mysqlx.Datatypes.Scalar.String',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Datatypes.Scalar.String.value', index=0,
+      number=1, type=12, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='collation', full_name='Mysqlx.Datatypes.Scalar.String.collation', index=1,
+      number=2, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=299,
+  serialized_end=341,
+)
+
+_SCALAR_OCTETS = _descriptor.Descriptor(
+  name='Octets',
+  full_name='Mysqlx.Datatypes.Scalar.Octets',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Datatypes.Scalar.Octets.value', index=0,
+      number=1, type=12, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='content_type', full_name='Mysqlx.Datatypes.Scalar.Octets.content_type', index=1,
+      number=2, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=343,
+  serialized_end=388,
+)
+
+_SCALAR = _descriptor.Descriptor(
+  name='Scalar',
+  full_name='Mysqlx.Datatypes.Scalar',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='Mysqlx.Datatypes.Scalar.type', index=0,
+      number=1, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='v_signed_int', full_name='Mysqlx.Datatypes.Scalar.v_signed_int', index=1,
+      number=2, type=18, cpp_type=2, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='v_unsigned_int', full_name='Mysqlx.Datatypes.Scalar.v_unsigned_int', index=2,
+      number=3, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='v_octets', full_name='Mysqlx.Datatypes.Scalar.v_octets', index=3,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='v_double', full_name='Mysqlx.Datatypes.Scalar.v_double', index=4,
+      number=6, type=1, cpp_type=5, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='v_float', full_name='Mysqlx.Datatypes.Scalar.v_float', index=5,
+      number=7, type=2, cpp_type=6, label=1,
+      has_default_value=False, default_value=float(0),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='v_bool', full_name='Mysqlx.Datatypes.Scalar.v_bool', index=6,
+      number=8, type=8, cpp_type=7, label=1,
+      has_default_value=False, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='v_string', full_name='Mysqlx.Datatypes.Scalar.v_string', index=7,
+      number=9, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[_SCALAR_STRING, _SCALAR_OCTETS, ],
+  enum_types=[
+    _SCALAR_TYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=45,
+  serialized_end=499,
+)
+
+
+_OBJECT_OBJECTFIELD = _descriptor.Descriptor(
+  name='ObjectField',
+  full_name='Mysqlx.Datatypes.Object.ObjectField',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='Mysqlx.Datatypes.Object.ObjectField.key', index=0,
+      number=1, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Datatypes.Object.ObjectField.value', index=1,
+      number=2, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=562,
+  serialized_end=626,
+)
+
+_OBJECT = _descriptor.Descriptor(
+  name='Object',
+  full_name='Mysqlx.Datatypes.Object',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='fld', full_name='Mysqlx.Datatypes.Object.fld', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[_OBJECT_OBJECTFIELD, ],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=501,
+  serialized_end=626,
+)
+
+
+_ARRAY = _descriptor.Descriptor(
+  name='Array',
+  full_name='Mysqlx.Datatypes.Array',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Datatypes.Array.value', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=628,
+  serialized_end=673,
+)
+
+
+_ANY = _descriptor.Descriptor(
+  name='Any',
+  full_name='Mysqlx.Datatypes.Any',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='Mysqlx.Datatypes.Any.type', index=0,
+      number=1, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='scalar', full_name='Mysqlx.Datatypes.Any.scalar', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='obj', full_name='Mysqlx.Datatypes.Any.obj', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='array', full_name='Mysqlx.Datatypes.Any.array', index=3,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _ANY_TYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=676,
+  serialized_end=887,
+)
+
+_SCALAR_STRING.containing_type = _SCALAR
+_SCALAR_OCTETS.containing_type = _SCALAR
+_SCALAR.fields_by_name['type'].enum_type = _SCALAR_TYPE
+_SCALAR.fields_by_name['v_octets'].message_type = _SCALAR_OCTETS
+_SCALAR.fields_by_name['v_string'].message_type = _SCALAR_STRING
+_SCALAR_TYPE.containing_type = _SCALAR
+_OBJECT_OBJECTFIELD.fields_by_name['value'].message_type = _ANY
+_OBJECT_OBJECTFIELD.containing_type = _OBJECT
+_OBJECT.fields_by_name['fld'].message_type = _OBJECT_OBJECTFIELD
+_ARRAY.fields_by_name['value'].message_type = _ANY
+_ANY.fields_by_name['type'].enum_type = _ANY_TYPE
+_ANY.fields_by_name['scalar'].message_type = _SCALAR
+_ANY.fields_by_name['obj'].message_type = _OBJECT
+_ANY.fields_by_name['array'].message_type = _ARRAY
+_ANY_TYPE.containing_type = _ANY
+DESCRIPTOR.message_types_by_name['Scalar'] = _SCALAR
+DESCRIPTOR.message_types_by_name['Object'] = _OBJECT
+DESCRIPTOR.message_types_by_name['Array'] = _ARRAY
+DESCRIPTOR.message_types_by_name['Any'] = _ANY
+
+Scalar = _reflection.GeneratedProtocolMessageType('Scalar', (_message.Message,), dict(
+
+  String = _reflection.GeneratedProtocolMessageType('String', (_message.Message,), dict(
+    DESCRIPTOR = _SCALAR_STRING,
+    __module__ = 'mysqlx_datatypes_pb2'
+    # @@protoc_insertion_point(class_scope:Mysqlx.Datatypes.Scalar.String)
+    ))
+  ,
+
+  Octets = _reflection.GeneratedProtocolMessageType('Octets', (_message.Message,), dict(
+    DESCRIPTOR = _SCALAR_OCTETS,
+    __module__ = 'mysqlx_datatypes_pb2'
+    # @@protoc_insertion_point(class_scope:Mysqlx.Datatypes.Scalar.Octets)
+    ))
+  ,
+  DESCRIPTOR = _SCALAR,
+  __module__ = 'mysqlx_datatypes_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Datatypes.Scalar)
+  ))
+_sym_db.RegisterMessage(Scalar)
+_sym_db.RegisterMessage(Scalar.String)
+_sym_db.RegisterMessage(Scalar.Octets)
+
+Object = _reflection.GeneratedProtocolMessageType('Object', (_message.Message,), dict(
+
+  ObjectField = _reflection.GeneratedProtocolMessageType('ObjectField', (_message.Message,), dict(
+    DESCRIPTOR = _OBJECT_OBJECTFIELD,
+    __module__ = 'mysqlx_datatypes_pb2'
+    # @@protoc_insertion_point(class_scope:Mysqlx.Datatypes.Object.ObjectField)
+    ))
+  ,
+  DESCRIPTOR = _OBJECT,
+  __module__ = 'mysqlx_datatypes_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Datatypes.Object)
+  ))
+_sym_db.RegisterMessage(Object)
+_sym_db.RegisterMessage(Object.ObjectField)
+
+Array = _reflection.GeneratedProtocolMessageType('Array', (_message.Message,), dict(
+  DESCRIPTOR = _ARRAY,
+  __module__ = 'mysqlx_datatypes_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Datatypes.Array)
+  ))
+_sym_db.RegisterMessage(Array)
+
+Any = _reflection.GeneratedProtocolMessageType('Any', (_message.Message,), dict(
+  DESCRIPTOR = _ANY,
+  __module__ = 'mysqlx_datatypes_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Datatypes.Any)
+  ))
+_sym_db.RegisterMessage(Any)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_expect_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_expect_pb2.py
new file mode 100644
index 0000000..ca26aec
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_expect_pb2.py
@@ -0,0 +1,270 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_expect.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_expect.proto',
+  package='Mysqlx.Expect',
+  syntax='proto2',
+  serialized_pb=_b('\n\x13mysqlx_expect.proto\x12\rMysqlx.Expect\"\xd0\x03\n\x04Open\x12\x42\n\x02op\x18\x01 \x01(\x0e\x32 .Mysqlx.Expect.Open.CtxOperation:\x14\x45XPECT_CTX_COPY_PREV\x12+\n\x04\x63ond\x18\x02 \x03(\x0b\x32\x1d.Mysqlx.Expect.Open.Condition\x1a\x96\x02\n\tCondition\x12\x15\n\rcondition_key\x18\x01 \x02(\r\x12\x17\n\x0f\x63ondition_value\x18\x02 \x01(\x0c\x12K\n\x02op\x18\x03 \x01(\x0e\x32\x30.Mysqlx.Expect.Open.Condition.ConditionOperation:\rEXPECT_OP_SET\"N\n\x03Key\x12\x13\n\x0f\x45XPECT_NO_ERROR\x10\x01\x12\x16\n\x12\x45XPECT_FIELD_EXIST\x10\x02\x12\x1a\n\x16\x45XPECT_DOCID_GENERATED\x10\x03\"<\n\x12\x43onditionOperation\x12\x11\n\rEXPECT_OP_SET\x10\x00\x12\x13\n\x0f\x45XPECT_OP_UNSET\x10\x01\">\n\x0c\x43txOperation\x12\x18\n\x14\x45XPECT_CTX_COPY_PREV\x10\x00\x12\x14\n\x10\x45XPECT_CTX_EMPTY\x10\x01\"\x07\n\x05\x43loseB\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+)
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+_OPEN_CONDITION_KEY = _descriptor.EnumDescriptor(
+  name='Key',
+  full_name='Mysqlx.Expect.Open.Condition.Key',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='EXPECT_NO_ERROR', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='EXPECT_FIELD_EXIST', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='EXPECT_DOCID_GENERATED', index=2, number=3,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=299,
+  serialized_end=377,
+)
+_sym_db.RegisterEnumDescriptor(_OPEN_CONDITION_KEY)
+
+_OPEN_CONDITION_CONDITIONOPERATION = _descriptor.EnumDescriptor(
+  name='ConditionOperation',
+  full_name='Mysqlx.Expect.Open.Condition.ConditionOperation',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='EXPECT_OP_SET', index=0, number=0,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='EXPECT_OP_UNSET', index=1, number=1,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=379,
+  serialized_end=439,
+)
+_sym_db.RegisterEnumDescriptor(_OPEN_CONDITION_CONDITIONOPERATION)
+
+_OPEN_CTXOPERATION = _descriptor.EnumDescriptor(
+  name='CtxOperation',
+  full_name='Mysqlx.Expect.Open.CtxOperation',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='EXPECT_CTX_COPY_PREV', index=0, number=0,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='EXPECT_CTX_EMPTY', index=1, number=1,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=441,
+  serialized_end=503,
+)
+_sym_db.RegisterEnumDescriptor(_OPEN_CTXOPERATION)
+
+
+_OPEN_CONDITION = _descriptor.Descriptor(
+  name='Condition',
+  full_name='Mysqlx.Expect.Open.Condition',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='condition_key', full_name='Mysqlx.Expect.Open.Condition.condition_key', index=0,
+      number=1, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='condition_value', full_name='Mysqlx.Expect.Open.Condition.condition_value', index=1,
+      number=2, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='op', full_name='Mysqlx.Expect.Open.Condition.op', index=2,
+      number=3, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _OPEN_CONDITION_KEY,
+    _OPEN_CONDITION_CONDITIONOPERATION,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=161,
+  serialized_end=439,
+)
+
+_OPEN = _descriptor.Descriptor(
+  name='Open',
+  full_name='Mysqlx.Expect.Open',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='op', full_name='Mysqlx.Expect.Open.op', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='cond', full_name='Mysqlx.Expect.Open.cond', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[_OPEN_CONDITION, ],
+  enum_types=[
+    _OPEN_CTXOPERATION,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=39,
+  serialized_end=503,
+)
+
+
+_CLOSE = _descriptor.Descriptor(
+  name='Close',
+  full_name='Mysqlx.Expect.Close',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=505,
+  serialized_end=512,
+)
+
+_OPEN_CONDITION.fields_by_name['op'].enum_type = _OPEN_CONDITION_CONDITIONOPERATION
+_OPEN_CONDITION.containing_type = _OPEN
+_OPEN_CONDITION_KEY.containing_type = _OPEN_CONDITION
+_OPEN_CONDITION_CONDITIONOPERATION.containing_type = _OPEN_CONDITION
+_OPEN.fields_by_name['op'].enum_type = _OPEN_CTXOPERATION
+_OPEN.fields_by_name['cond'].message_type = _OPEN_CONDITION
+_OPEN_CTXOPERATION.containing_type = _OPEN
+DESCRIPTOR.message_types_by_name['Open'] = _OPEN
+DESCRIPTOR.message_types_by_name['Close'] = _CLOSE
+
+Open = _reflection.GeneratedProtocolMessageType('Open', (_message.Message,), dict(
+
+  Condition = _reflection.GeneratedProtocolMessageType('Condition', (_message.Message,), dict(
+    DESCRIPTOR = _OPEN_CONDITION,
+    __module__ = 'mysqlx_expect_pb2'
+    # @@protoc_insertion_point(class_scope:Mysqlx.Expect.Open.Condition)
+    ))
+  ,
+  DESCRIPTOR = _OPEN,
+  __module__ = 'mysqlx_expect_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Expect.Open)
+  ))
+_sym_db.RegisterMessage(Open)
+_sym_db.RegisterMessage(Open.Condition)
+
+Close = _reflection.GeneratedProtocolMessageType('Close', (_message.Message,), dict(
+  DESCRIPTOR = _CLOSE,
+  __module__ = 'mysqlx_expect_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Expect.Close)
+  ))
+_sym_db.RegisterMessage(Close)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_expr_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_expr_pb2.py
new file mode 100644
index 0000000..27181a1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_expr_pb2.py
@@ -0,0 +1,631 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_expr.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from mysqlx.protobuf import mysqlx_datatypes_pb2 as mysqlx__datatypes__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_expr.proto',
+  package='Mysqlx.Expr',
+  syntax='proto2',
+  serialized_pb=_b('\n\x11mysqlx_expr.proto\x12\x0bMysqlx.Expr\x1a\x16mysqlx_datatypes.proto\"\xc4\x03\n\x04\x45xpr\x12$\n\x04type\x18\x01 \x02(\x0e\x32\x16.Mysqlx.Expr.Expr.Type\x12\x31\n\nidentifier\x18\x02 \x01(\x0b\x32\x1d.Mysqlx.Expr.ColumnIdentifier\x12\x10\n\x08variable\x18\x03 \x01(\t\x12)\n\x07literal\x18\x04 \x01(\x0b\x32\x18.Mysqlx.Datatypes.Scalar\x12\x30\n\rfunction_call\x18\x05 \x01(\x0b\x32\x19.Mysqlx.Expr.FunctionCall\x12\'\n\x08operator\x18\x06 \x01(\x0b\x32\x15.Mysqlx.Expr.Operator\x12\x10\n\x08position\x18\x07 \x01(\r\x12#\n\x06object\x18\x08 \x01(\x0b\x32\x13.Mysqlx.Expr.Object\x12!\n\x05\x61rray\x18\t \x01(\x0b\x32\x12.Mysqlx.Expr.Array\"q\n\x04Type\x12\t\n\x05IDENT\x10\x01\x12\x0b\n\x07LITERAL\x10\x02\x12\x0c\n\x08VARIABLE\x10\x03\x12\r\n\tFUNC_CALL\x10\x04\x12\x0c\n\x08OPERATOR\x10\x05\x12\x0f\n\x0bPLACEHOLDER\x10\x06\x12\n\n\x06OBJECT\x10\x07\x12\t\n\x05\x41RRAY\x10\x08\"/\n\nIdentifier\x12\x0c\n\x04name\x18\x01 \x02(\t\x12\x13\n\x0bschema_name\x18\x02 \x01(\t\"\xcb\x01\n\x10\x44ocumentPathItem\x12\x30\n\x04type\x18\x01 \x02(\x0e\x32\".Mysqlx.Expr.DocumentPathItem.Type\x12\r\n\x05value\x18\x02 \x01(\t\x12\r\n\x05index\x18\x03 \x01(\r\"g\n\x04Type\x12\n\n\x06MEMBER\x10\x01\x12\x13\n\x0fMEMBER_ASTERISK\x10\x02\x12\x0f\n\x0b\x41RRAY_INDEX\x10\x03\x12\x18\n\x14\x41RRAY_INDEX_ASTERISK\x10\x04\x12\x13\n\x0f\x44OUBLE_ASTERISK\x10\x05\"\x7f\n\x10\x43olumnIdentifier\x12\x34\n\rdocument_path\x18\x01 \x03(\x0b\x32\x1d.Mysqlx.Expr.DocumentPathItem\x12\x0c\n\x04name\x18\x02 \x01(\t\x12\x12\n\ntable_name\x18\x03 \x01(\t\x12\x13\n\x0bschema_name\x18\x04 \x01(\t\"W\n\x0c\x46unctionCall\x12%\n\x04name\x18\x01 \x02(\x0b\x32\x17.Mysqlx.Expr.Identifier\x12 \n\x05param\x18\x02 \x03(\x0b\x32\x11.Mysqlx.Expr.Expr\":\n\x08Operator\x12\x0c\n\x04name\x18\x01 \x02(\t\x12 \n\x05param\x18\x02 \x03(\x0b\x32\x11.Mysqlx.Expr.Expr\"t\n\x06Object\x12,\n\x03\x66ld\x18\x01 \x03(\x0b\x32\x1f.Mysqlx.Expr.Object.ObjectField\x1a<\n\x0bObjectField\x12\x0b\n\x03key\x18\x01 \x02(\t\x12 \n\x05value\x18\x02 \x02(\x0b\x32\x11.Mysqlx.Expr.Expr\")\n\x05\x41rray\x12 \n\x05value\x18\x01 \x03(\x0b\x32\x11.Mysqlx.Expr.ExprB\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+  ,
+  dependencies=[mysqlx__datatypes__pb2.DESCRIPTOR,])
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+_EXPR_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='Mysqlx.Expr.Expr.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='IDENT', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='LITERAL', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='VARIABLE', index=2, number=3,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='FUNC_CALL', index=3, number=4,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='OPERATOR', index=4, number=5,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='PLACEHOLDER', index=5, number=6,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='OBJECT', index=6, number=7,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ARRAY', index=7, number=8,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=398,
+  serialized_end=511,
+)
+_sym_db.RegisterEnumDescriptor(_EXPR_TYPE)
+
+_DOCUMENTPATHITEM_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='Mysqlx.Expr.DocumentPathItem.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='MEMBER', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='MEMBER_ASTERISK', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ARRAY_INDEX', index=2, number=3,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ARRAY_INDEX_ASTERISK', index=3, number=4,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='DOUBLE_ASTERISK', index=4, number=5,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=663,
+  serialized_end=766,
+)
+_sym_db.RegisterEnumDescriptor(_DOCUMENTPATHITEM_TYPE)
+
+
+_EXPR = _descriptor.Descriptor(
+  name='Expr',
+  full_name='Mysqlx.Expr.Expr',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='Mysqlx.Expr.Expr.type', index=0,
+      number=1, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='identifier', full_name='Mysqlx.Expr.Expr.identifier', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='variable', full_name='Mysqlx.Expr.Expr.variable', index=2,
+      number=3, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='literal', full_name='Mysqlx.Expr.Expr.literal', index=3,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='function_call', full_name='Mysqlx.Expr.Expr.function_call', index=4,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='operator', full_name='Mysqlx.Expr.Expr.operator', index=5,
+      number=6, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='position', full_name='Mysqlx.Expr.Expr.position', index=6,
+      number=7, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='object', full_name='Mysqlx.Expr.Expr.object', index=7,
+      number=8, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='array', full_name='Mysqlx.Expr.Expr.array', index=8,
+      number=9, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _EXPR_TYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=59,
+  serialized_end=511,
+)
+
+
+_IDENTIFIER = _descriptor.Descriptor(
+  name='Identifier',
+  full_name='Mysqlx.Expr.Identifier',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='Mysqlx.Expr.Identifier.name', index=0,
+      number=1, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='schema_name', full_name='Mysqlx.Expr.Identifier.schema_name', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=513,
+  serialized_end=560,
+)
+
+
+_DOCUMENTPATHITEM = _descriptor.Descriptor(
+  name='DocumentPathItem',
+  full_name='Mysqlx.Expr.DocumentPathItem',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='Mysqlx.Expr.DocumentPathItem.type', index=0,
+      number=1, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Expr.DocumentPathItem.value', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='index', full_name='Mysqlx.Expr.DocumentPathItem.index', index=2,
+      number=3, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _DOCUMENTPATHITEM_TYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=563,
+  serialized_end=766,
+)
+
+
+_COLUMNIDENTIFIER = _descriptor.Descriptor(
+  name='ColumnIdentifier',
+  full_name='Mysqlx.Expr.ColumnIdentifier',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='document_path', full_name='Mysqlx.Expr.ColumnIdentifier.document_path', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='name', full_name='Mysqlx.Expr.ColumnIdentifier.name', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='table_name', full_name='Mysqlx.Expr.ColumnIdentifier.table_name', index=2,
+      number=3, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='schema_name', full_name='Mysqlx.Expr.ColumnIdentifier.schema_name', index=3,
+      number=4, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=768,
+  serialized_end=895,
+)
+
+
+_FUNCTIONCALL = _descriptor.Descriptor(
+  name='FunctionCall',
+  full_name='Mysqlx.Expr.FunctionCall',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='Mysqlx.Expr.FunctionCall.name', index=0,
+      number=1, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='param', full_name='Mysqlx.Expr.FunctionCall.param', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=897,
+  serialized_end=984,
+)
+
+
+_OPERATOR = _descriptor.Descriptor(
+  name='Operator',
+  full_name='Mysqlx.Expr.Operator',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='Mysqlx.Expr.Operator.name', index=0,
+      number=1, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='param', full_name='Mysqlx.Expr.Operator.param', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=986,
+  serialized_end=1044,
+)
+
+
+_OBJECT_OBJECTFIELD = _descriptor.Descriptor(
+  name='ObjectField',
+  full_name='Mysqlx.Expr.Object.ObjectField',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='key', full_name='Mysqlx.Expr.Object.ObjectField.key', index=0,
+      number=1, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Expr.Object.ObjectField.value', index=1,
+      number=2, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1102,
+  serialized_end=1162,
+)
+
+_OBJECT = _descriptor.Descriptor(
+  name='Object',
+  full_name='Mysqlx.Expr.Object',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='fld', full_name='Mysqlx.Expr.Object.fld', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[_OBJECT_OBJECTFIELD, ],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1046,
+  serialized_end=1162,
+)
+
+
+_ARRAY = _descriptor.Descriptor(
+  name='Array',
+  full_name='Mysqlx.Expr.Array',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Expr.Array.value', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1164,
+  serialized_end=1205,
+)
+
+_EXPR.fields_by_name['type'].enum_type = _EXPR_TYPE
+_EXPR.fields_by_name['identifier'].message_type = _COLUMNIDENTIFIER
+_EXPR.fields_by_name['literal'].message_type = mysqlx__datatypes__pb2._SCALAR
+_EXPR.fields_by_name['function_call'].message_type = _FUNCTIONCALL
+_EXPR.fields_by_name['operator'].message_type = _OPERATOR
+_EXPR.fields_by_name['object'].message_type = _OBJECT
+_EXPR.fields_by_name['array'].message_type = _ARRAY
+_EXPR_TYPE.containing_type = _EXPR
+_DOCUMENTPATHITEM.fields_by_name['type'].enum_type = _DOCUMENTPATHITEM_TYPE
+_DOCUMENTPATHITEM_TYPE.containing_type = _DOCUMENTPATHITEM
+_COLUMNIDENTIFIER.fields_by_name['document_path'].message_type = _DOCUMENTPATHITEM
+_FUNCTIONCALL.fields_by_name['name'].message_type = _IDENTIFIER
+_FUNCTIONCALL.fields_by_name['param'].message_type = _EXPR
+_OPERATOR.fields_by_name['param'].message_type = _EXPR
+_OBJECT_OBJECTFIELD.fields_by_name['value'].message_type = _EXPR
+_OBJECT_OBJECTFIELD.containing_type = _OBJECT
+_OBJECT.fields_by_name['fld'].message_type = _OBJECT_OBJECTFIELD
+_ARRAY.fields_by_name['value'].message_type = _EXPR
+DESCRIPTOR.message_types_by_name['Expr'] = _EXPR
+DESCRIPTOR.message_types_by_name['Identifier'] = _IDENTIFIER
+DESCRIPTOR.message_types_by_name['DocumentPathItem'] = _DOCUMENTPATHITEM
+DESCRIPTOR.message_types_by_name['ColumnIdentifier'] = _COLUMNIDENTIFIER
+DESCRIPTOR.message_types_by_name['FunctionCall'] = _FUNCTIONCALL
+DESCRIPTOR.message_types_by_name['Operator'] = _OPERATOR
+DESCRIPTOR.message_types_by_name['Object'] = _OBJECT
+DESCRIPTOR.message_types_by_name['Array'] = _ARRAY
+
+Expr = _reflection.GeneratedProtocolMessageType('Expr', (_message.Message,), dict(
+  DESCRIPTOR = _EXPR,
+  __module__ = 'mysqlx_expr_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Expr.Expr)
+  ))
+_sym_db.RegisterMessage(Expr)
+
+Identifier = _reflection.GeneratedProtocolMessageType('Identifier', (_message.Message,), dict(
+  DESCRIPTOR = _IDENTIFIER,
+  __module__ = 'mysqlx_expr_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Expr.Identifier)
+  ))
+_sym_db.RegisterMessage(Identifier)
+
+DocumentPathItem = _reflection.GeneratedProtocolMessageType('DocumentPathItem', (_message.Message,), dict(
+  DESCRIPTOR = _DOCUMENTPATHITEM,
+  __module__ = 'mysqlx_expr_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Expr.DocumentPathItem)
+  ))
+_sym_db.RegisterMessage(DocumentPathItem)
+
+ColumnIdentifier = _reflection.GeneratedProtocolMessageType('ColumnIdentifier', (_message.Message,), dict(
+  DESCRIPTOR = _COLUMNIDENTIFIER,
+  __module__ = 'mysqlx_expr_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Expr.ColumnIdentifier)
+  ))
+_sym_db.RegisterMessage(ColumnIdentifier)
+
+FunctionCall = _reflection.GeneratedProtocolMessageType('FunctionCall', (_message.Message,), dict(
+  DESCRIPTOR = _FUNCTIONCALL,
+  __module__ = 'mysqlx_expr_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Expr.FunctionCall)
+  ))
+_sym_db.RegisterMessage(FunctionCall)
+
+Operator = _reflection.GeneratedProtocolMessageType('Operator', (_message.Message,), dict(
+  DESCRIPTOR = _OPERATOR,
+  __module__ = 'mysqlx_expr_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Expr.Operator)
+  ))
+_sym_db.RegisterMessage(Operator)
+
+Object = _reflection.GeneratedProtocolMessageType('Object', (_message.Message,), dict(
+
+  ObjectField = _reflection.GeneratedProtocolMessageType('ObjectField', (_message.Message,), dict(
+    DESCRIPTOR = _OBJECT_OBJECTFIELD,
+    __module__ = 'mysqlx_expr_pb2'
+    # @@protoc_insertion_point(class_scope:Mysqlx.Expr.Object.ObjectField)
+    ))
+  ,
+  DESCRIPTOR = _OBJECT,
+  __module__ = 'mysqlx_expr_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Expr.Object)
+  ))
+_sym_db.RegisterMessage(Object)
+_sym_db.RegisterMessage(Object.ObjectField)
+
+Array = _reflection.GeneratedProtocolMessageType('Array', (_message.Message,), dict(
+  DESCRIPTOR = _ARRAY,
+  __module__ = 'mysqlx_expr_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Expr.Array)
+  ))
+_sym_db.RegisterMessage(Array)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_notice_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_notice_pb2.py
new file mode 100644
index 0000000..a4624ce
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_notice_pb2.py
@@ -0,0 +1,523 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_notice.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from mysqlx.protobuf import mysqlx_datatypes_pb2 as mysqlx__datatypes__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_notice.proto',
+  package='Mysqlx.Notice',
+  syntax='proto2',
+  serialized_pb=_b('\n\x13mysqlx_notice.proto\x12\rMysqlx.Notice\x1a\x16mysqlx_datatypes.proto\"\xff\x01\n\x05\x46rame\x12\x0c\n\x04type\x18\x01 \x02(\r\x12\x31\n\x05scope\x18\x02 \x01(\x0e\x32\x1a.Mysqlx.Notice.Frame.Scope:\x06GLOBAL\x12\x0f\n\x07payload\x18\x03 \x01(\x0c\"\x1e\n\x05Scope\x12\n\n\x06GLOBAL\x10\x01\x12\t\n\x05LOCAL\x10\x02\"\x83\x01\n\x04Type\x12\x0b\n\x07WARNING\x10\x01\x12\x1c\n\x18SESSION_VARIABLE_CHANGED\x10\x02\x12\x19\n\x15SESSION_STATE_CHANGED\x10\x03\x12#\n\x1fGROUP_REPLICATION_STATE_CHANGED\x10\x04\x12\x10\n\x0cSERVER_HELLO\x10\x05\"\x85\x01\n\x07Warning\x12\x34\n\x05level\x18\x01 \x01(\x0e\x32\x1c.Mysqlx.Notice.Warning.Level:\x07WARNING\x12\x0c\n\x04\x63ode\x18\x02 \x02(\r\x12\x0b\n\x03msg\x18\x03 \x02(\t\")\n\x05Level\x12\x08\n\x04NOTE\x10\x01\x12\x0b\n\x07WARNING\x10\x02\x12\t\n\x05\x45RROR\x10\x03\"P\n\x16SessionVariableChanged\x12\r\n\x05param\x18\x01 \x02(\t\x12\'\n\x05value\x18\x02 \x01(\x0b\x32\x18.Mysqlx.Datatypes.Scalar\"\xf1\x02\n\x13SessionStateChanged\x12;\n\x05param\x18\x01 \x02(\x0e\x32,.Mysqlx.Notice.SessionStateChanged.Parameter\x12\'\n\x05value\x18\x02 \x03(\x0b\x32\x18.Mysqlx.Datatypes.Scalar\"\xf3\x01\n\tParameter\x12\x12\n\x0e\x43URRENT_SCHEMA\x10\x01\x12\x13\n\x0f\x41\x43\x43OUNT_EXPIRED\x10\x02\x12\x17\n\x13GENERATED_INSERT_ID\x10\x03\x12\x11\n\rROWS_AFFECTED\x10\x04\x12\x0e\n\nROWS_FOUND\x10\x05\x12\x10\n\x0cROWS_MATCHED\x10\x06\x12\x11\n\rTRX_COMMITTED\x10\x07\x12\x12\n\x0eTRX_ROLLEDBACK\x10\t\x12\x14\n\x10PRODUCED_MESSAGE\x10\n\x12\x16\n\x12\x43LIENT_ID_ASSIGNED\x10\x0b\x12\x1a\n\x16GENERATED_DOCUMENT_IDS\x10\x0c\"\xae\x01\n\x1cGroupReplicationStateChanged\x12\x0c\n\x04type\x18\x01 \x02(\r\x12\x0f\n\x07view_id\x18\x02 \x01(\t\"o\n\x04Type\x12\x1a\n\x16MEMBERSHIP_QUORUM_LOSS\x10\x01\x12\x1a\n\x16MEMBERSHIP_VIEW_CHANGE\x10\x02\x12\x16\n\x12MEMBER_ROLE_CHANGE\x10\x03\x12\x17\n\x13MEMBER_STATE_CHANGE\x10\x04\"\r\n\x0bServerHelloB\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+  ,
+  dependencies=[mysqlx__datatypes__pb2.DESCRIPTOR,])
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+_FRAME_SCOPE = _descriptor.EnumDescriptor(
+  name='Scope',
+  full_name='Mysqlx.Notice.Frame.Scope',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='GLOBAL', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='LOCAL', index=1, number=2,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=154,
+  serialized_end=184,
+)
+_sym_db.RegisterEnumDescriptor(_FRAME_SCOPE)
+
+_FRAME_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='Mysqlx.Notice.Frame.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='WARNING', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SESSION_VARIABLE_CHANGED', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SESSION_STATE_CHANGED', index=2, number=3,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='GROUP_REPLICATION_STATE_CHANGED', index=3, number=4,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SERVER_HELLO', index=4, number=5,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=187,
+  serialized_end=318,
+)
+_sym_db.RegisterEnumDescriptor(_FRAME_TYPE)
+
+_WARNING_LEVEL = _descriptor.EnumDescriptor(
+  name='Level',
+  full_name='Mysqlx.Notice.Warning.Level',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='NOTE', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='WARNING', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ERROR', index=2, number=3,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=413,
+  serialized_end=454,
+)
+_sym_db.RegisterEnumDescriptor(_WARNING_LEVEL)
+
+_SESSIONSTATECHANGED_PARAMETER = _descriptor.EnumDescriptor(
+  name='Parameter',
+  full_name='Mysqlx.Notice.SessionStateChanged.Parameter',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='CURRENT_SCHEMA', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ACCOUNT_EXPIRED', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='GENERATED_INSERT_ID', index=2, number=3,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ROWS_AFFECTED', index=3, number=4,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ROWS_FOUND', index=4, number=5,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ROWS_MATCHED', index=5, number=6,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='TRX_COMMITTED', index=6, number=7,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='TRX_ROLLEDBACK', index=7, number=9,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='PRODUCED_MESSAGE', index=8, number=10,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CLIENT_ID_ASSIGNED', index=9, number=11,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='GENERATED_DOCUMENT_IDS', index=10, number=12,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=665,
+  serialized_end=908,
+)
+_sym_db.RegisterEnumDescriptor(_SESSIONSTATECHANGED_PARAMETER)
+
+_GROUPREPLICATIONSTATECHANGED_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='Mysqlx.Notice.GroupReplicationStateChanged.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='MEMBERSHIP_QUORUM_LOSS', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='MEMBERSHIP_VIEW_CHANGE', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='MEMBER_ROLE_CHANGE', index=2, number=3,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='MEMBER_STATE_CHANGE', index=3, number=4,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=974,
+  serialized_end=1085,
+)
+_sym_db.RegisterEnumDescriptor(_GROUPREPLICATIONSTATECHANGED_TYPE)
+
+
+_FRAME = _descriptor.Descriptor(
+  name='Frame',
+  full_name='Mysqlx.Notice.Frame',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='Mysqlx.Notice.Frame.type', index=0,
+      number=1, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='scope', full_name='Mysqlx.Notice.Frame.scope', index=1,
+      number=2, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='payload', full_name='Mysqlx.Notice.Frame.payload', index=2,
+      number=3, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _FRAME_SCOPE,
+    _FRAME_TYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=63,
+  serialized_end=318,
+)
+
+
+_WARNING = _descriptor.Descriptor(
+  name='Warning',
+  full_name='Mysqlx.Notice.Warning',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='level', full_name='Mysqlx.Notice.Warning.level', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=2,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='code', full_name='Mysqlx.Notice.Warning.code', index=1,
+      number=2, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='msg', full_name='Mysqlx.Notice.Warning.msg', index=2,
+      number=3, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _WARNING_LEVEL,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=321,
+  serialized_end=454,
+)
+
+
+_SESSIONVARIABLECHANGED = _descriptor.Descriptor(
+  name='SessionVariableChanged',
+  full_name='Mysqlx.Notice.SessionVariableChanged',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='param', full_name='Mysqlx.Notice.SessionVariableChanged.param', index=0,
+      number=1, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Notice.SessionVariableChanged.value', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=456,
+  serialized_end=536,
+)
+
+
+_SESSIONSTATECHANGED = _descriptor.Descriptor(
+  name='SessionStateChanged',
+  full_name='Mysqlx.Notice.SessionStateChanged',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='param', full_name='Mysqlx.Notice.SessionStateChanged.param', index=0,
+      number=1, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='value', full_name='Mysqlx.Notice.SessionStateChanged.value', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _SESSIONSTATECHANGED_PARAMETER,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=539,
+  serialized_end=908,
+)
+
+
+_GROUPREPLICATIONSTATECHANGED = _descriptor.Descriptor(
+  name='GroupReplicationStateChanged',
+  full_name='Mysqlx.Notice.GroupReplicationStateChanged',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='Mysqlx.Notice.GroupReplicationStateChanged.type', index=0,
+      number=1, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='view_id', full_name='Mysqlx.Notice.GroupReplicationStateChanged.view_id', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _GROUPREPLICATIONSTATECHANGED_TYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=911,
+  serialized_end=1085,
+)
+
+
+_SERVERHELLO = _descriptor.Descriptor(
+  name='ServerHello',
+  full_name='Mysqlx.Notice.ServerHello',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=1087,
+  serialized_end=1100,
+)
+
+_FRAME.fields_by_name['scope'].enum_type = _FRAME_SCOPE
+_FRAME_SCOPE.containing_type = _FRAME
+_FRAME_TYPE.containing_type = _FRAME
+_WARNING.fields_by_name['level'].enum_type = _WARNING_LEVEL
+_WARNING_LEVEL.containing_type = _WARNING
+_SESSIONVARIABLECHANGED.fields_by_name['value'].message_type = mysqlx__datatypes__pb2._SCALAR
+_SESSIONSTATECHANGED.fields_by_name['param'].enum_type = _SESSIONSTATECHANGED_PARAMETER
+_SESSIONSTATECHANGED.fields_by_name['value'].message_type = mysqlx__datatypes__pb2._SCALAR
+_SESSIONSTATECHANGED_PARAMETER.containing_type = _SESSIONSTATECHANGED
+_GROUPREPLICATIONSTATECHANGED_TYPE.containing_type = _GROUPREPLICATIONSTATECHANGED
+DESCRIPTOR.message_types_by_name['Frame'] = _FRAME
+DESCRIPTOR.message_types_by_name['Warning'] = _WARNING
+DESCRIPTOR.message_types_by_name['SessionVariableChanged'] = _SESSIONVARIABLECHANGED
+DESCRIPTOR.message_types_by_name['SessionStateChanged'] = _SESSIONSTATECHANGED
+DESCRIPTOR.message_types_by_name['GroupReplicationStateChanged'] = _GROUPREPLICATIONSTATECHANGED
+DESCRIPTOR.message_types_by_name['ServerHello'] = _SERVERHELLO
+
+Frame = _reflection.GeneratedProtocolMessageType('Frame', (_message.Message,), dict(
+  DESCRIPTOR = _FRAME,
+  __module__ = 'mysqlx_notice_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Notice.Frame)
+  ))
+_sym_db.RegisterMessage(Frame)
+
+Warning = _reflection.GeneratedProtocolMessageType('Warning', (_message.Message,), dict(
+  DESCRIPTOR = _WARNING,
+  __module__ = 'mysqlx_notice_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Notice.Warning)
+  ))
+_sym_db.RegisterMessage(Warning)
+
+SessionVariableChanged = _reflection.GeneratedProtocolMessageType('SessionVariableChanged', (_message.Message,), dict(
+  DESCRIPTOR = _SESSIONVARIABLECHANGED,
+  __module__ = 'mysqlx_notice_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Notice.SessionVariableChanged)
+  ))
+_sym_db.RegisterMessage(SessionVariableChanged)
+
+SessionStateChanged = _reflection.GeneratedProtocolMessageType('SessionStateChanged', (_message.Message,), dict(
+  DESCRIPTOR = _SESSIONSTATECHANGED,
+  __module__ = 'mysqlx_notice_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Notice.SessionStateChanged)
+  ))
+_sym_db.RegisterMessage(SessionStateChanged)
+
+GroupReplicationStateChanged = _reflection.GeneratedProtocolMessageType('GroupReplicationStateChanged', (_message.Message,), dict(
+  DESCRIPTOR = _GROUPREPLICATIONSTATECHANGED,
+  __module__ = 'mysqlx_notice_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Notice.GroupReplicationStateChanged)
+  ))
+_sym_db.RegisterMessage(GroupReplicationStateChanged)
+
+ServerHello = _reflection.GeneratedProtocolMessageType('ServerHello', (_message.Message,), dict(
+  DESCRIPTOR = _SERVERHELLO,
+  __module__ = 'mysqlx_notice_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Notice.ServerHello)
+  ))
+_sym_db.RegisterMessage(ServerHello)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_pb2.py
new file mode 100644
index 0000000..a9c12ac
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_pb2.py
@@ -0,0 +1,432 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx.proto',
+  package='Mysqlx',
+  syntax='proto2',
+  serialized_pb=_b('\n\x0cmysqlx.proto\x12\x06Mysqlx\"\xfc\x03\n\x0e\x43lientMessages\"\xe9\x03\n\x04Type\x12\x18\n\x14\x43ON_CAPABILITIES_GET\x10\x01\x12\x18\n\x14\x43ON_CAPABILITIES_SET\x10\x02\x12\r\n\tCON_CLOSE\x10\x03\x12\x1b\n\x17SESS_AUTHENTICATE_START\x10\x04\x12\x1e\n\x1aSESS_AUTHENTICATE_CONTINUE\x10\x05\x12\x0e\n\nSESS_RESET\x10\x06\x12\x0e\n\nSESS_CLOSE\x10\x07\x12\x14\n\x10SQL_STMT_EXECUTE\x10\x0c\x12\r\n\tCRUD_FIND\x10\x11\x12\x0f\n\x0b\x43RUD_INSERT\x10\x12\x12\x0f\n\x0b\x43RUD_UPDATE\x10\x13\x12\x0f\n\x0b\x43RUD_DELETE\x10\x14\x12\x0f\n\x0b\x45XPECT_OPEN\x10\x18\x12\x10\n\x0c\x45XPECT_CLOSE\x10\x19\x12\x14\n\x10\x43RUD_CREATE_VIEW\x10\x1e\x12\x14\n\x10\x43RUD_MODIFY_VIEW\x10\x1f\x12\x12\n\x0e\x43RUD_DROP_VIEW\x10 \x12\x13\n\x0fPREPARE_PREPARE\x10(\x12\x13\n\x0fPREPARE_EXECUTE\x10)\x12\x16\n\x12PREPARE_DEALLOCATE\x10*\x12\x0f\n\x0b\x43URSOR_OPEN\x10+\x12\x10\n\x0c\x43URSOR_CLOSE\x10,\x12\x10\n\x0c\x43URSOR_FETCH\x10-\x12\x0f\n\x0b\x43OMPRESSION\x10.\"\xf3\x02\n\x0eServerMessages\"\xe0\x02\n\x04Type\x12\x06\n\x02OK\x10\x00\x12\t\n\x05\x45RROR\x10\x01\x12\x15\n\x11\x43ONN_CAPABILITIES\x10\x02\x12\x1e\n\x1aSESS_AUTHENTICATE_CONTINUE\x10\x03\x12\x18\n\x14SESS_AUTHENTICATE_OK\x10\x04\x12\n\n\x06NOTICE\x10\x0b\x12\x1e\n\x1aRESULTSET_COLUMN_META_DATA\x10\x0c\x12\x11\n\rRESULTSET_ROW\x10\r\x12\x18\n\x14RESULTSET_FETCH_DONE\x10\x0e\x12\x1d\n\x19RESULTSET_FETCH_SUSPENDED\x10\x0f\x12(\n$RESULTSET_FETCH_DONE_MORE_RESULTSETS\x10\x10\x12\x17\n\x13SQL_STMT_EXECUTE_OK\x10\x11\x12(\n$RESULTSET_FETCH_DONE_MORE_OUT_PARAMS\x10\x12\x12\x0f\n\x0b\x43OMPRESSION\x10\x13\"\x11\n\x02Ok\x12\x0b\n\x03msg\x18\x01 \x01(\t\"\x88\x01\n\x05\x45rror\x12/\n\x08severity\x18\x01 \x01(\x0e\x32\x16.Mysqlx.Error.Severity:\x05\x45RROR\x12\x0c\n\x04\x63ode\x18\x02 \x02(\r\x12\x11\n\tsql_state\x18\x04 \x02(\t\x12\x0b\n\x03msg\x18\x03 \x02(\t\" \n\x08Severity\x12\t\n\x05\x45RROR\x10\x00\x12\t\n\x05\x46\x41TAL\x10\x01\x42\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+)
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+_CLIENTMESSAGES_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='Mysqlx.ClientMessages.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='CON_CAPABILITIES_GET', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CON_CAPABILITIES_SET', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CON_CLOSE', index=2, number=3,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SESS_AUTHENTICATE_START', index=3, number=4,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SESS_AUTHENTICATE_CONTINUE', index=4, number=5,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SESS_RESET', index=5, number=6,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SESS_CLOSE', index=6, number=7,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SQL_STMT_EXECUTE', index=7, number=12,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CRUD_FIND', index=8, number=17,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CRUD_INSERT', index=9, number=18,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CRUD_UPDATE', index=10, number=19,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CRUD_DELETE', index=11, number=20,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='EXPECT_OPEN', index=12, number=24,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='EXPECT_CLOSE', index=13, number=25,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CRUD_CREATE_VIEW', index=14, number=30,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CRUD_MODIFY_VIEW', index=15, number=31,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CRUD_DROP_VIEW', index=16, number=32,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='PREPARE_PREPARE', index=17, number=40,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='PREPARE_EXECUTE', index=18, number=41,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='PREPARE_DEALLOCATE', index=19, number=42,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CURSOR_OPEN', index=20, number=43,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CURSOR_CLOSE', index=21, number=44,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CURSOR_FETCH', index=22, number=45,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='COMPRESSION', index=23, number=46,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=44,
+  serialized_end=533,
+)
+_sym_db.RegisterEnumDescriptor(_CLIENTMESSAGES_TYPE)
+
+_SERVERMESSAGES_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='Mysqlx.ServerMessages.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='OK', index=0, number=0,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ERROR', index=1, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='CONN_CAPABILITIES', index=2, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SESS_AUTHENTICATE_CONTINUE', index=3, number=3,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SESS_AUTHENTICATE_OK', index=4, number=4,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='NOTICE', index=5, number=11,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='RESULTSET_COLUMN_META_DATA', index=6, number=12,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='RESULTSET_ROW', index=7, number=13,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='RESULTSET_FETCH_DONE', index=8, number=14,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='RESULTSET_FETCH_SUSPENDED', index=9, number=15,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='RESULTSET_FETCH_DONE_MORE_RESULTSETS', index=10, number=16,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SQL_STMT_EXECUTE_OK', index=11, number=17,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='RESULTSET_FETCH_DONE_MORE_OUT_PARAMS', index=12, number=18,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='COMPRESSION', index=13, number=19,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=555,
+  serialized_end=907,
+)
+_sym_db.RegisterEnumDescriptor(_SERVERMESSAGES_TYPE)
+
+_ERROR_SEVERITY = _descriptor.EnumDescriptor(
+  name='Severity',
+  full_name='Mysqlx.Error.Severity',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='ERROR', index=0, number=0,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='FATAL', index=1, number=1,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=1033,
+  serialized_end=1065,
+)
+_sym_db.RegisterEnumDescriptor(_ERROR_SEVERITY)
+
+
+_CLIENTMESSAGES = _descriptor.Descriptor(
+  name='ClientMessages',
+  full_name='Mysqlx.ClientMessages',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _CLIENTMESSAGES_TYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=25,
+  serialized_end=533,
+)
+
+
+_SERVERMESSAGES = _descriptor.Descriptor(
+  name='ServerMessages',
+  full_name='Mysqlx.ServerMessages',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _SERVERMESSAGES_TYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=536,
+  serialized_end=907,
+)
+
+
+_OK = _descriptor.Descriptor(
+  name='Ok',
+  full_name='Mysqlx.Ok',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='msg', full_name='Mysqlx.Ok.msg', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=909,
+  serialized_end=926,
+)
+
+
+_ERROR = _descriptor.Descriptor(
+  name='Error',
+  full_name='Mysqlx.Error',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='severity', full_name='Mysqlx.Error.severity', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=True, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='code', full_name='Mysqlx.Error.code', index=1,
+      number=2, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='sql_state', full_name='Mysqlx.Error.sql_state', index=2,
+      number=4, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='msg', full_name='Mysqlx.Error.msg', index=3,
+      number=3, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _ERROR_SEVERITY,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=929,
+  serialized_end=1065,
+)
+
+_CLIENTMESSAGES_TYPE.containing_type = _CLIENTMESSAGES
+_SERVERMESSAGES_TYPE.containing_type = _SERVERMESSAGES
+_ERROR.fields_by_name['severity'].enum_type = _ERROR_SEVERITY
+_ERROR_SEVERITY.containing_type = _ERROR
+DESCRIPTOR.message_types_by_name['ClientMessages'] = _CLIENTMESSAGES
+DESCRIPTOR.message_types_by_name['ServerMessages'] = _SERVERMESSAGES
+DESCRIPTOR.message_types_by_name['Ok'] = _OK
+DESCRIPTOR.message_types_by_name['Error'] = _ERROR
+
+ClientMessages = _reflection.GeneratedProtocolMessageType('ClientMessages', (_message.Message,), dict(
+  DESCRIPTOR = _CLIENTMESSAGES,
+  __module__ = 'mysqlx_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.ClientMessages)
+  ))
+_sym_db.RegisterMessage(ClientMessages)
+
+ServerMessages = _reflection.GeneratedProtocolMessageType('ServerMessages', (_message.Message,), dict(
+  DESCRIPTOR = _SERVERMESSAGES,
+  __module__ = 'mysqlx_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.ServerMessages)
+  ))
+_sym_db.RegisterMessage(ServerMessages)
+
+Ok = _reflection.GeneratedProtocolMessageType('Ok', (_message.Message,), dict(
+  DESCRIPTOR = _OK,
+  __module__ = 'mysqlx_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Ok)
+  ))
+_sym_db.RegisterMessage(Ok)
+
+Error = _reflection.GeneratedProtocolMessageType('Error', (_message.Message,), dict(
+  DESCRIPTOR = _ERROR,
+  __module__ = 'mysqlx_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Error)
+  ))
+_sym_db.RegisterMessage(Error)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_prepare_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_prepare_pb2.py
new file mode 100644
index 0000000..e8131eb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_prepare_pb2.py
@@ -0,0 +1,320 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_prepare.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from mysqlx.protobuf import mysqlx_sql_pb2 as mysqlx__sql__pb2
+from mysqlx.protobuf import mysqlx_crud_pb2 as mysqlx__crud__pb2
+from mysqlx.protobuf import mysqlx_datatypes_pb2 as mysqlx__datatypes__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_prepare.proto',
+  package='Mysqlx.Prepare',
+  syntax='proto2',
+  serialized_pb=_b('\n\x14mysqlx_prepare.proto\x12\x0eMysqlx.Prepare\x1a\x10mysqlx_sql.proto\x1a\x11mysqlx_crud.proto\x1a\x16mysqlx_datatypes.proto\"\x97\x03\n\x07Prepare\x12\x0f\n\x07stmt_id\x18\x01 \x02(\r\x12\x32\n\x04stmt\x18\x02 \x02(\x0b\x32$.Mysqlx.Prepare.Prepare.OneOfMessage\x1a\xc6\x02\n\x0cOneOfMessage\x12\x37\n\x04type\x18\x01 \x02(\x0e\x32).Mysqlx.Prepare.Prepare.OneOfMessage.Type\x12\x1f\n\x04\x66ind\x18\x02 \x01(\x0b\x32\x11.Mysqlx.Crud.Find\x12#\n\x06insert\x18\x03 \x01(\x0b\x32\x13.Mysqlx.Crud.Insert\x12#\n\x06update\x18\x04 \x01(\x0b\x32\x13.Mysqlx.Crud.Update\x12#\n\x06\x64\x65lete\x18\x05 \x01(\x0b\x32\x13.Mysqlx.Crud.Delete\x12-\n\x0cstmt_execute\x18\x06 \x01(\x0b\x32\x17.Mysqlx.Sql.StmtExecute\">\n\x04Type\x12\x08\n\x04\x46IND\x10\x00\x12\n\n\x06INSERT\x10\x01\x12\n\n\x06UPDATE\x10\x02\x12\n\n\x06\x44\x45LETE\x10\x04\x12\x08\n\x04STMT\x10\x05\"`\n\x07\x45xecute\x12\x0f\n\x07stmt_id\x18\x01 \x02(\r\x12#\n\x04\x61rgs\x18\x02 \x03(\x0b\x32\x15.Mysqlx.Datatypes.Any\x12\x1f\n\x10\x63ompact_metadata\x18\x03 \x01(\x08:\x05\x66\x61lse\"\x1d\n\nDeallocate\x12\x0f\n\x07stmt_id\x18\x01 \x02(\rB\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+  ,
+  dependencies=[mysqlx__sql__pb2.DESCRIPTOR,mysqlx__crud__pb2.DESCRIPTOR,mysqlx__datatypes__pb2.DESCRIPTOR,])
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+_PREPARE_ONEOFMESSAGE_TYPE = _descriptor.EnumDescriptor(
+  name='Type',
+  full_name='Mysqlx.Prepare.Prepare.OneOfMessage.Type',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='FIND', index=0, number=0,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='INSERT', index=1, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='UPDATE', index=2, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='DELETE', index=3, number=4,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='STMT', index=4, number=5,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=447,
+  serialized_end=509,
+)
+_sym_db.RegisterEnumDescriptor(_PREPARE_ONEOFMESSAGE_TYPE)
+
+
+_PREPARE_ONEOFMESSAGE = _descriptor.Descriptor(
+  name='OneOfMessage',
+  full_name='Mysqlx.Prepare.Prepare.OneOfMessage',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='Mysqlx.Prepare.Prepare.OneOfMessage.type', index=0,
+      number=1, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='find', full_name='Mysqlx.Prepare.Prepare.OneOfMessage.find', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='insert', full_name='Mysqlx.Prepare.Prepare.OneOfMessage.insert', index=2,
+      number=3, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='update', full_name='Mysqlx.Prepare.Prepare.OneOfMessage.update', index=3,
+      number=4, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='delete', full_name='Mysqlx.Prepare.Prepare.OneOfMessage.delete', index=4,
+      number=5, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='stmt_execute', full_name='Mysqlx.Prepare.Prepare.OneOfMessage.stmt_execute', index=5,
+      number=6, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _PREPARE_ONEOFMESSAGE_TYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=183,
+  serialized_end=509,
+)
+
+_PREPARE = _descriptor.Descriptor(
+  name='Prepare',
+  full_name='Mysqlx.Prepare.Prepare',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='stmt_id', full_name='Mysqlx.Prepare.Prepare.stmt_id', index=0,
+      number=1, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='stmt', full_name='Mysqlx.Prepare.Prepare.stmt', index=1,
+      number=2, type=11, cpp_type=10, label=2,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[_PREPARE_ONEOFMESSAGE, ],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=102,
+  serialized_end=509,
+)
+
+
+_EXECUTE = _descriptor.Descriptor(
+  name='Execute',
+  full_name='Mysqlx.Prepare.Execute',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='stmt_id', full_name='Mysqlx.Prepare.Execute.stmt_id', index=0,
+      number=1, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='args', full_name='Mysqlx.Prepare.Execute.args', index=1,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='compact_metadata', full_name='Mysqlx.Prepare.Execute.compact_metadata', index=2,
+      number=3, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=511,
+  serialized_end=607,
+)
+
+
+_DEALLOCATE = _descriptor.Descriptor(
+  name='Deallocate',
+  full_name='Mysqlx.Prepare.Deallocate',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='stmt_id', full_name='Mysqlx.Prepare.Deallocate.stmt_id', index=0,
+      number=1, type=13, cpp_type=3, label=2,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=609,
+  serialized_end=638,
+)
+
+_PREPARE_ONEOFMESSAGE.fields_by_name['type'].enum_type = _PREPARE_ONEOFMESSAGE_TYPE
+_PREPARE_ONEOFMESSAGE.fields_by_name['find'].message_type = mysqlx__crud__pb2._FIND
+_PREPARE_ONEOFMESSAGE.fields_by_name['insert'].message_type = mysqlx__crud__pb2._INSERT
+_PREPARE_ONEOFMESSAGE.fields_by_name['update'].message_type = mysqlx__crud__pb2._UPDATE
+_PREPARE_ONEOFMESSAGE.fields_by_name['delete'].message_type = mysqlx__crud__pb2._DELETE
+_PREPARE_ONEOFMESSAGE.fields_by_name['stmt_execute'].message_type = mysqlx__sql__pb2._STMTEXECUTE
+_PREPARE_ONEOFMESSAGE.containing_type = _PREPARE
+_PREPARE_ONEOFMESSAGE_TYPE.containing_type = _PREPARE_ONEOFMESSAGE
+_PREPARE.fields_by_name['stmt'].message_type = _PREPARE_ONEOFMESSAGE
+_EXECUTE.fields_by_name['args'].message_type = mysqlx__datatypes__pb2._ANY
+DESCRIPTOR.message_types_by_name['Prepare'] = _PREPARE
+DESCRIPTOR.message_types_by_name['Execute'] = _EXECUTE
+DESCRIPTOR.message_types_by_name['Deallocate'] = _DEALLOCATE
+
+Prepare = _reflection.GeneratedProtocolMessageType('Prepare', (_message.Message,), dict(
+
+  OneOfMessage = _reflection.GeneratedProtocolMessageType('OneOfMessage', (_message.Message,), dict(
+    DESCRIPTOR = _PREPARE_ONEOFMESSAGE,
+    __module__ = 'mysqlx_prepare_pb2'
+    # @@protoc_insertion_point(class_scope:Mysqlx.Prepare.Prepare.OneOfMessage)
+    ))
+  ,
+  DESCRIPTOR = _PREPARE,
+  __module__ = 'mysqlx_prepare_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Prepare.Prepare)
+  ))
+_sym_db.RegisterMessage(Prepare)
+_sym_db.RegisterMessage(Prepare.OneOfMessage)
+
+Execute = _reflection.GeneratedProtocolMessageType('Execute', (_message.Message,), dict(
+  DESCRIPTOR = _EXECUTE,
+  __module__ = 'mysqlx_prepare_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Prepare.Execute)
+  ))
+_sym_db.RegisterMessage(Execute)
+
+Deallocate = _reflection.GeneratedProtocolMessageType('Deallocate', (_message.Message,), dict(
+  DESCRIPTOR = _DEALLOCATE,
+  __module__ = 'mysqlx_prepare_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Prepare.Deallocate)
+  ))
+_sym_db.RegisterMessage(Deallocate)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_resultset_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_resultset_pb2.py
new file mode 100644
index 0000000..0ba75da
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_resultset_pb2.py
@@ -0,0 +1,462 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_resultset.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_resultset.proto',
+  package='Mysqlx.Resultset',
+  syntax='proto2',
+  serialized_pb=_b('\n\x16mysqlx_resultset.proto\x12\x10Mysqlx.Resultset\"\x18\n\x16\x46\x65tchDoneMoreOutParams\"\x19\n\x17\x46\x65tchDoneMoreResultsets\"\x0b\n\tFetchDone\"\x10\n\x0e\x46\x65tchSuspended\"\x9f\x03\n\x0e\x43olumnMetaData\x12\x38\n\x04type\x18\x01 \x02(\x0e\x32*.Mysqlx.Resultset.ColumnMetaData.FieldType\x12\x0c\n\x04name\x18\x02 \x01(\x0c\x12\x15\n\roriginal_name\x18\x03 \x01(\x0c\x12\r\n\x05table\x18\x04 \x01(\x0c\x12\x16\n\x0eoriginal_table\x18\x05 \x01(\x0c\x12\x0e\n\x06schema\x18\x06 \x01(\x0c\x12\x0f\n\x07\x63\x61talog\x18\x07 \x01(\x0c\x12\x11\n\tcollation\x18\x08 \x01(\x04\x12\x19\n\x11\x66ractional_digits\x18\t \x01(\r\x12\x0e\n\x06length\x18\n \x01(\r\x12\r\n\x05\x66lags\x18\x0b \x01(\r\x12\x14\n\x0c\x63ontent_type\x18\x0c \x01(\r\"\x82\x01\n\tFieldType\x12\x08\n\x04SINT\x10\x01\x12\x08\n\x04UINT\x10\x02\x12\n\n\x06\x44OUBLE\x10\x05\x12\t\n\x05\x46LOAT\x10\x06\x12\t\n\x05\x42YTES\x10\x07\x12\x08\n\x04TIME\x10\n\x12\x0c\n\x08\x44\x41TETIME\x10\x0c\x12\x07\n\x03SET\x10\x0f\x12\x08\n\x04\x45NUM\x10\x10\x12\x07\n\x03\x42IT\x10\x11\x12\x0b\n\x07\x44\x45\x43IMAL\x10\x12\"\x14\n\x03Row\x12\r\n\x05\x66ield\x18\x01 \x03(\x0c*4\n\x11\x43ontentType_BYTES\x12\x0c\n\x08GEOMETRY\x10\x01\x12\x08\n\x04JSON\x10\x02\x12\x07\n\x03XML\x10\x03*.\n\x14\x43ontentType_DATETIME\x12\x08\n\x04\x44\x41TE\x10\x01\x12\x0c\n\x08\x44\x41TETIME\x10\x02\x42\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+)
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+_CONTENTTYPE_BYTES = _descriptor.EnumDescriptor(
+  name='ContentType_BYTES',
+  full_name='Mysqlx.Resultset.ContentType_BYTES',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='GEOMETRY', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='JSON', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='XML', index=2, number=3,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=568,
+  serialized_end=620,
+)
+_sym_db.RegisterEnumDescriptor(_CONTENTTYPE_BYTES)
+
+ContentType_BYTES = enum_type_wrapper.EnumTypeWrapper(_CONTENTTYPE_BYTES)
+_CONTENTTYPE_DATETIME = _descriptor.EnumDescriptor(
+  name='ContentType_DATETIME',
+  full_name='Mysqlx.Resultset.ContentType_DATETIME',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='DATE', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='DATETIME', index=1, number=2,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=622,
+  serialized_end=668,
+)
+_sym_db.RegisterEnumDescriptor(_CONTENTTYPE_DATETIME)
+
+ContentType_DATETIME = enum_type_wrapper.EnumTypeWrapper(_CONTENTTYPE_DATETIME)
+GEOMETRY = 1
+JSON = 2
+XML = 3
+DATE = 1
+DATETIME = 2
+
+
+_COLUMNMETADATA_FIELDTYPE = _descriptor.EnumDescriptor(
+  name='FieldType',
+  full_name='Mysqlx.Resultset.ColumnMetaData.FieldType',
+  filename=None,
+  file=DESCRIPTOR,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='SINT', index=0, number=1,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='UINT', index=1, number=2,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='DOUBLE', index=2, number=5,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='FLOAT', index=3, number=6,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='BYTES', index=4, number=7,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='TIME', index=5, number=10,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='DATETIME', index=6, number=12,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='SET', index=7, number=15,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='ENUM', index=8, number=16,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='BIT', index=9, number=17,
+      options=None,
+      type=None),
+    _descriptor.EnumValueDescriptor(
+      name='DECIMAL', index=10, number=18,
+      options=None,
+      type=None),
+  ],
+  containing_type=None,
+  options=None,
+  serialized_start=414,
+  serialized_end=544,
+)
+_sym_db.RegisterEnumDescriptor(_COLUMNMETADATA_FIELDTYPE)
+
+
+_FETCHDONEMOREOUTPARAMS = _descriptor.Descriptor(
+  name='FetchDoneMoreOutParams',
+  full_name='Mysqlx.Resultset.FetchDoneMoreOutParams',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=44,
+  serialized_end=68,
+)
+
+
+_FETCHDONEMORERESULTSETS = _descriptor.Descriptor(
+  name='FetchDoneMoreResultsets',
+  full_name='Mysqlx.Resultset.FetchDoneMoreResultsets',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=70,
+  serialized_end=95,
+)
+
+
+_FETCHDONE = _descriptor.Descriptor(
+  name='FetchDone',
+  full_name='Mysqlx.Resultset.FetchDone',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=97,
+  serialized_end=108,
+)
+
+
+_FETCHSUSPENDED = _descriptor.Descriptor(
+  name='FetchSuspended',
+  full_name='Mysqlx.Resultset.FetchSuspended',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=110,
+  serialized_end=126,
+)
+
+
+_COLUMNMETADATA = _descriptor.Descriptor(
+  name='ColumnMetaData',
+  full_name='Mysqlx.Resultset.ColumnMetaData',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='Mysqlx.Resultset.ColumnMetaData.type', index=0,
+      number=1, type=14, cpp_type=8, label=2,
+      has_default_value=False, default_value=1,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='name', full_name='Mysqlx.Resultset.ColumnMetaData.name', index=1,
+      number=2, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='original_name', full_name='Mysqlx.Resultset.ColumnMetaData.original_name', index=2,
+      number=3, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='table', full_name='Mysqlx.Resultset.ColumnMetaData.table', index=3,
+      number=4, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='original_table', full_name='Mysqlx.Resultset.ColumnMetaData.original_table', index=4,
+      number=5, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='schema', full_name='Mysqlx.Resultset.ColumnMetaData.schema', index=5,
+      number=6, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='catalog', full_name='Mysqlx.Resultset.ColumnMetaData.catalog', index=6,
+      number=7, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='collation', full_name='Mysqlx.Resultset.ColumnMetaData.collation', index=7,
+      number=8, type=4, cpp_type=4, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='fractional_digits', full_name='Mysqlx.Resultset.ColumnMetaData.fractional_digits', index=8,
+      number=9, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='length', full_name='Mysqlx.Resultset.ColumnMetaData.length', index=9,
+      number=10, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='flags', full_name='Mysqlx.Resultset.ColumnMetaData.flags', index=10,
+      number=11, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='content_type', full_name='Mysqlx.Resultset.ColumnMetaData.content_type', index=11,
+      number=12, type=13, cpp_type=3, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _COLUMNMETADATA_FIELDTYPE,
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=129,
+  serialized_end=544,
+)
+
+
+_ROW = _descriptor.Descriptor(
+  name='Row',
+  full_name='Mysqlx.Resultset.Row',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='field', full_name='Mysqlx.Resultset.Row.field', index=0,
+      number=1, type=12, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=546,
+  serialized_end=566,
+)
+
+_COLUMNMETADATA.fields_by_name['type'].enum_type = _COLUMNMETADATA_FIELDTYPE
+_COLUMNMETADATA_FIELDTYPE.containing_type = _COLUMNMETADATA
+DESCRIPTOR.message_types_by_name['FetchDoneMoreOutParams'] = _FETCHDONEMOREOUTPARAMS
+DESCRIPTOR.message_types_by_name['FetchDoneMoreResultsets'] = _FETCHDONEMORERESULTSETS
+DESCRIPTOR.message_types_by_name['FetchDone'] = _FETCHDONE
+DESCRIPTOR.message_types_by_name['FetchSuspended'] = _FETCHSUSPENDED
+DESCRIPTOR.message_types_by_name['ColumnMetaData'] = _COLUMNMETADATA
+DESCRIPTOR.message_types_by_name['Row'] = _ROW
+DESCRIPTOR.enum_types_by_name['ContentType_BYTES'] = _CONTENTTYPE_BYTES
+DESCRIPTOR.enum_types_by_name['ContentType_DATETIME'] = _CONTENTTYPE_DATETIME
+
+FetchDoneMoreOutParams = _reflection.GeneratedProtocolMessageType('FetchDoneMoreOutParams', (_message.Message,), dict(
+  DESCRIPTOR = _FETCHDONEMOREOUTPARAMS,
+  __module__ = 'mysqlx_resultset_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Resultset.FetchDoneMoreOutParams)
+  ))
+_sym_db.RegisterMessage(FetchDoneMoreOutParams)
+
+FetchDoneMoreResultsets = _reflection.GeneratedProtocolMessageType('FetchDoneMoreResultsets', (_message.Message,), dict(
+  DESCRIPTOR = _FETCHDONEMORERESULTSETS,
+  __module__ = 'mysqlx_resultset_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Resultset.FetchDoneMoreResultsets)
+  ))
+_sym_db.RegisterMessage(FetchDoneMoreResultsets)
+
+FetchDone = _reflection.GeneratedProtocolMessageType('FetchDone', (_message.Message,), dict(
+  DESCRIPTOR = _FETCHDONE,
+  __module__ = 'mysqlx_resultset_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Resultset.FetchDone)
+  ))
+_sym_db.RegisterMessage(FetchDone)
+
+FetchSuspended = _reflection.GeneratedProtocolMessageType('FetchSuspended', (_message.Message,), dict(
+  DESCRIPTOR = _FETCHSUSPENDED,
+  __module__ = 'mysqlx_resultset_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Resultset.FetchSuspended)
+  ))
+_sym_db.RegisterMessage(FetchSuspended)
+
+ColumnMetaData = _reflection.GeneratedProtocolMessageType('ColumnMetaData', (_message.Message,), dict(
+  DESCRIPTOR = _COLUMNMETADATA,
+  __module__ = 'mysqlx_resultset_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Resultset.ColumnMetaData)
+  ))
+_sym_db.RegisterMessage(ColumnMetaData)
+
+Row = _reflection.GeneratedProtocolMessageType('Row', (_message.Message,), dict(
+  DESCRIPTOR = _ROW,
+  __module__ = 'mysqlx_resultset_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Resultset.Row)
+  ))
+_sym_db.RegisterMessage(Row)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_session_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_session_pb2.py
new file mode 100644
index 0000000..25924c0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_session_pb2.py
@@ -0,0 +1,262 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_session.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_session.proto',
+  package='Mysqlx.Session',
+  syntax='proto2',
+  serialized_pb=_b('\n\x14mysqlx_session.proto\x12\x0eMysqlx.Session\"S\n\x11\x41uthenticateStart\x12\x11\n\tmech_name\x18\x01 \x02(\t\x12\x11\n\tauth_data\x18\x02 \x01(\x0c\x12\x18\n\x10initial_response\x18\x03 \x01(\x0c\")\n\x14\x41uthenticateContinue\x12\x11\n\tauth_data\x18\x01 \x02(\x0c\"#\n\x0e\x41uthenticateOk\x12\x11\n\tauth_data\x18\x01 \x01(\x0c\"!\n\x05Reset\x12\x18\n\tkeep_open\x18\x01 \x01(\x08:\x05\x66\x61lse\"\x07\n\x05\x43loseB\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+)
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+
+_AUTHENTICATESTART = _descriptor.Descriptor(
+  name='AuthenticateStart',
+  full_name='Mysqlx.Session.AuthenticateStart',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='mech_name', full_name='Mysqlx.Session.AuthenticateStart.mech_name', index=0,
+      number=1, type=9, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='auth_data', full_name='Mysqlx.Session.AuthenticateStart.auth_data', index=1,
+      number=2, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='initial_response', full_name='Mysqlx.Session.AuthenticateStart.initial_response', index=2,
+      number=3, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=40,
+  serialized_end=123,
+)
+
+
+_AUTHENTICATECONTINUE = _descriptor.Descriptor(
+  name='AuthenticateContinue',
+  full_name='Mysqlx.Session.AuthenticateContinue',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='auth_data', full_name='Mysqlx.Session.AuthenticateContinue.auth_data', index=0,
+      number=1, type=12, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=125,
+  serialized_end=166,
+)
+
+
+_AUTHENTICATEOK = _descriptor.Descriptor(
+  name='AuthenticateOk',
+  full_name='Mysqlx.Session.AuthenticateOk',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='auth_data', full_name='Mysqlx.Session.AuthenticateOk.auth_data', index=0,
+      number=1, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=168,
+  serialized_end=203,
+)
+
+
+_RESET = _descriptor.Descriptor(
+  name='Reset',
+  full_name='Mysqlx.Session.Reset',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='keep_open', full_name='Mysqlx.Session.Reset.keep_open', index=0,
+      number=1, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=205,
+  serialized_end=238,
+)
+
+
+_CLOSE = _descriptor.Descriptor(
+  name='Close',
+  full_name='Mysqlx.Session.Close',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=240,
+  serialized_end=247,
+)
+
+DESCRIPTOR.message_types_by_name['AuthenticateStart'] = _AUTHENTICATESTART
+DESCRIPTOR.message_types_by_name['AuthenticateContinue'] = _AUTHENTICATECONTINUE
+DESCRIPTOR.message_types_by_name['AuthenticateOk'] = _AUTHENTICATEOK
+DESCRIPTOR.message_types_by_name['Reset'] = _RESET
+DESCRIPTOR.message_types_by_name['Close'] = _CLOSE
+
+AuthenticateStart = _reflection.GeneratedProtocolMessageType('AuthenticateStart', (_message.Message,), dict(
+  DESCRIPTOR = _AUTHENTICATESTART,
+  __module__ = 'mysqlx_session_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Session.AuthenticateStart)
+  ))
+_sym_db.RegisterMessage(AuthenticateStart)
+
+AuthenticateContinue = _reflection.GeneratedProtocolMessageType('AuthenticateContinue', (_message.Message,), dict(
+  DESCRIPTOR = _AUTHENTICATECONTINUE,
+  __module__ = 'mysqlx_session_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Session.AuthenticateContinue)
+  ))
+_sym_db.RegisterMessage(AuthenticateContinue)
+
+AuthenticateOk = _reflection.GeneratedProtocolMessageType('AuthenticateOk', (_message.Message,), dict(
+  DESCRIPTOR = _AUTHENTICATEOK,
+  __module__ = 'mysqlx_session_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Session.AuthenticateOk)
+  ))
+_sym_db.RegisterMessage(AuthenticateOk)
+
+Reset = _reflection.GeneratedProtocolMessageType('Reset', (_message.Message,), dict(
+  DESCRIPTOR = _RESET,
+  __module__ = 'mysqlx_session_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Session.Reset)
+  ))
+_sym_db.RegisterMessage(Reset)
+
+Close = _reflection.GeneratedProtocolMessageType('Close', (_message.Message,), dict(
+  DESCRIPTOR = _CLOSE,
+  __module__ = 'mysqlx_session_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Session.Close)
+  ))
+_sym_db.RegisterMessage(Close)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_sql_pb2.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_sql_pb2.py
new file mode 100644
index 0000000..79e5654
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protobuf/mysqlx_sql_pb2.py
@@ -0,0 +1,155 @@
+# Copyright (c) 2017, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: mysqlx_sql.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from mysqlx.protobuf import mysqlx_datatypes_pb2 as mysqlx__datatypes__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='mysqlx_sql.proto',
+  package='Mysqlx.Sql',
+  syntax='proto2',
+  serialized_pb=_b('\n\x10mysqlx_sql.proto\x12\nMysqlx.Sql\x1a\x16mysqlx_datatypes.proto\"y\n\x0bStmtExecute\x12\x16\n\tnamespace\x18\x03 \x01(\t:\x03sql\x12\x0c\n\x04stmt\x18\x01 \x02(\x0c\x12#\n\x04\x61rgs\x18\x02 \x03(\x0b\x32\x15.Mysqlx.Datatypes.Any\x12\x1f\n\x10\x63ompact_metadata\x18\x04 \x01(\x08:\x05\x66\x61lse\"\x0f\n\rStmtExecuteOkB\x1b\n\x17\x63om.mysql.cj.x.protobufH\x03')
+  ,
+  dependencies=[mysqlx__datatypes__pb2.DESCRIPTOR,])
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+
+_STMTEXECUTE = _descriptor.Descriptor(
+  name='StmtExecute',
+  full_name='Mysqlx.Sql.StmtExecute',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='namespace', full_name='Mysqlx.Sql.StmtExecute.namespace', index=0,
+      number=3, type=9, cpp_type=9, label=1,
+      has_default_value=True, default_value=_b("sql").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='stmt', full_name='Mysqlx.Sql.StmtExecute.stmt', index=1,
+      number=1, type=12, cpp_type=9, label=2,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='args', full_name='Mysqlx.Sql.StmtExecute.args', index=2,
+      number=2, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='compact_metadata', full_name='Mysqlx.Sql.StmtExecute.compact_metadata', index=3,
+      number=4, type=8, cpp_type=7, label=1,
+      has_default_value=True, default_value=False,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=56,
+  serialized_end=177,
+)
+
+
+_STMTEXECUTEOK = _descriptor.Descriptor(
+  name='StmtExecuteOk',
+  full_name='Mysqlx.Sql.StmtExecuteOk',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=179,
+  serialized_end=194,
+)
+
+_STMTEXECUTE.fields_by_name['args'].message_type = mysqlx__datatypes__pb2._ANY
+DESCRIPTOR.message_types_by_name['StmtExecute'] = _STMTEXECUTE
+DESCRIPTOR.message_types_by_name['StmtExecuteOk'] = _STMTEXECUTEOK
+
+StmtExecute = _reflection.GeneratedProtocolMessageType('StmtExecute', (_message.Message,), dict(
+  DESCRIPTOR = _STMTEXECUTE,
+  __module__ = 'mysqlx_sql_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Sql.StmtExecute)
+  ))
+_sym_db.RegisterMessage(StmtExecute)
+
+StmtExecuteOk = _reflection.GeneratedProtocolMessageType('StmtExecuteOk', (_message.Message,), dict(
+  DESCRIPTOR = _STMTEXECUTEOK,
+  __module__ = 'mysqlx_sql_pb2'
+  # @@protoc_insertion_point(class_scope:Mysqlx.Sql.StmtExecuteOk)
+  ))
+_sym_db.RegisterMessage(StmtExecuteOk)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(descriptor_pb2.FileOptions(), _b('\n\027com.mysql.cj.x.protobufH\003'))
+# @@protoc_insertion_point(module_scope)
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/protocol.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protocol.py
new file mode 100644
index 0000000..6ced76d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/protocol.py
@@ -0,0 +1,1052 @@
+# Copyright (c) 2016, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementation of the X protocol for MySQL servers.
+"""
+
+import struct
+import zlib
+
+from io import BytesIO
+
+try:
+    import lz4.frame
+    HAVE_LZ4 = True
+except ImportError:
+    HAVE_LZ4 = False
+
+try:
+    import zstandard as zstd
+    HAVE_ZSTD = True
+except ImportError:
+    HAVE_ZSTD = False
+
+from .compat import STRING_TYPES, INT_TYPES
+from .errors import (InterfaceError, NotSupportedError, OperationalError,
+                     ProgrammingError)
+from .expr import (ExprParser, build_expr, build_scalar, build_bool_scalar,
+                   build_int_scalar, build_unsigned_int_scalar)
+from .helpers import encode_to_bytes, get_item_or_attr
+from .result import Column
+from .protobuf import (CRUD_PREPARE_MAPPING, SERVER_MESSAGES,
+                       PROTOBUF_REPEATED_TYPES, Message, mysqlxpb_enum)
+
+
+_COMPRESSION_THRESHOLD = 1000
+
+
+class Compressor(object):
+    """Implements compression/decompression using `zstd_stream`, `lz4_message`
+    and `deflate_stream` algorithms.
+
+    Args:
+        algorithm (str): Compression algorithm.
+
+    .. versionadded:: 8.0.21
+
+    """
+    def __init__(self, algorithm):
+        self._algorithm = algorithm
+        if algorithm == "zstd_stream":
+            self._compressobj = zstd.ZstdCompressor()
+            self._decompressobj = zstd.ZstdDecompressor()
+        elif algorithm == "deflate_stream":
+            self._compressobj = zlib.compressobj()
+            self._decompressobj = zlib.decompressobj()
+        else:
+            self._compressobj = None
+            self._decompressobj = None
+
+    def compress(self, data):
+        """Compresses data and returns it.
+
+        Args:
+            data (str, bytes or buffer object): Data to be compressed.
+
+        Returns:
+            bytes: Compressed data.
+        """
+        if self._algorithm == "zstd_stream":
+            return self._compressobj.compress(data)
+        if self._algorithm == "lz4_message":
+            with lz4.frame.LZ4FrameCompressor() as compressor:
+                compressed = compressor.begin()
+                compressed += compressor.compress(data)
+                compressed += compressor.flush()
+            return compressed
+
+        # Using 'deflate_stream' algorithm
+        compressed = self._compressobj.compress(data)
+        compressed += self._compressobj.flush(zlib.Z_SYNC_FLUSH)
+        return compressed
+
+    def decompress(self, data):
+        """Decompresses a frame of data and returns it as a string of bytes.
+
+        Args:
+            data (str, bytes or buffer object): Data to be compressed.
+
+        Returns:
+            bytes: Decompresssed data.
+        """
+        if self._algorithm == "zstd_stream":
+            return self._decompressobj.decompress(data)
+        if self._algorithm == "lz4_message":
+            with lz4.frame.LZ4FrameDecompressor() as decompressor:
+                decompressed = decompressor.decompress(data)
+            return decompressed
+
+        # Using 'deflate' algorithm
+        decompressed = self._decompressobj.decompress(data)
+        decompressed += self._decompressobj.flush(zlib.Z_SYNC_FLUSH)
+        return decompressed
+
+
+class MessageReader(object):
+    """Implements a Message Reader.
+
+    Args:
+        socket_stream (mysqlx.connection.SocketStream): `SocketStream` object.
+
+    .. versionadded:: 8.0.21
+    """
+    def __init__(self, socket_stream):
+        self._stream = socket_stream
+        self._compressor = None
+        self._msg = None
+        self._msg_queue = []
+
+    def _read_message(self):
+        """Reads X Protocol messages from the stream and returns a
+        :class:`mysqlx.protobuf.Message` object.
+
+        Raises:
+            :class:`mysqlx.ProgrammingError`: If e connected server does not
+                                              have the MySQL X protocol plugin
+                                              enabled.
+
+        Returns:
+            mysqlx.protobuf.Message: MySQL X Protobuf Message.
+        """
+        if self._msg_queue:
+            return self._msg_queue.pop(0)
+
+        frame_size, frame_type = struct.unpack("<LB", self._stream.read(5))
+        if frame_type == 10:
+            raise ProgrammingError("The connected server does not have the "
+                                   "MySQL X protocol plugin enabled or "
+                                   "protocol mismatch")
+
+        frame_payload = self._stream.read(frame_size - 1)
+        if frame_type not in SERVER_MESSAGES:
+            raise ValueError("Unknown message type: {}".format(frame_type))
+
+        # Do not parse empty notices, Message requires a type in payload
+        if frame_type == 11 and frame_payload == b"":
+            return self._read_message()
+
+        frame_msg = Message.from_server_message(frame_type, frame_payload)
+
+        if frame_type == 19:  # Mysqlx.ServerMessages.Type.COMPRESSION
+            uncompressed_size = frame_msg["uncompressed_size"]
+            stream = BytesIO(self._compressor.decompress(frame_msg["payload"]))
+            bytes_processed = 0
+            while bytes_processed < uncompressed_size:
+                payload_size, msg_type = \
+                    struct.unpack("<LB", stream.read(5))
+                payload = stream.read(payload_size - 1)
+                self._msg_queue.append(
+                    Message.from_server_message(msg_type, payload))
+                bytes_processed += payload_size + 4
+            return self._msg_queue.pop(0) if self._msg_queue else None
+
+        return frame_msg
+
+    def read_message(self):
+        """Read message.
+
+        Returns:
+            mysqlx.protobuf.Message: MySQL X Protobuf Message.
+        """
+        if self._msg is not None:
+            msg = self._msg
+            self._msg = None
+            return msg
+        return self._read_message()
+
+    def push_message(self, msg):
+        """Push message.
+
+        Args:
+            msg (mysqlx.protobuf.Message): MySQL X Protobuf Message.
+
+        Raises:
+            :class:`mysqlx.OperationalError`: If message push slot is full.
+        """
+        if self._msg is not None:
+            raise OperationalError("Message push slot is full")
+        self._msg = msg
+
+    def set_compression(self, algorithm):
+        """Creates a :class:`mysqlx.protocol.Compressor` object based on the
+        compression algorithm.
+
+        Args:
+            algorithm (str): Compression algorithm.
+
+        .. versionadded:: 8.0.21
+
+        """
+        self._compressor = Compressor(algorithm) if algorithm else None
+
+
+class MessageWriter(object):
+    """Implements a Message Writer.
+
+    Args:
+        socket_stream (mysqlx.connection.SocketStream): `SocketStream` object.
+
+    .. versionadded:: 8.0.21
+
+    """
+    def __init__(self, socket_stream):
+        self._stream = socket_stream
+        self._compressor = None
+
+    def write_message(self, msg_type, msg):
+        """Write message.
+
+        Args:
+            msg_type (int): The message type.
+            msg (mysqlx.protobuf.Message): MySQL X Protobuf Message.
+        """
+        msg_size = msg.byte_size(msg)
+        if self._compressor and msg_size > _COMPRESSION_THRESHOLD:
+            msg_str = encode_to_bytes(msg.serialize_to_string())
+            header = struct.pack("<LB", msg_size + 1, msg_type)
+            compressed = self._compressor.compress(b"".join([header, msg_str]))
+
+            msg_first_fields = Message("Mysqlx.Connection.Compression")
+            msg_first_fields["client_messages"] = msg_type
+            msg_first_fields["uncompressed_size"] = msg_size + 5
+
+            msg_payload = Message("Mysqlx.Connection.Compression")
+            msg_payload["payload"] = compressed
+
+            output = b"".join([
+                encode_to_bytes(msg_first_fields.serialize_partial_to_string())[:-2],
+                encode_to_bytes(msg_payload.serialize_partial_to_string())
+            ])
+
+            msg_comp_id = \
+                mysqlxpb_enum("Mysqlx.ClientMessages.Type.COMPRESSION")
+            header = struct.pack("<LB", len(output) + 1, msg_comp_id)
+            self._stream.sendall(b"".join([header, output]))
+        else:
+            msg_str = encode_to_bytes(msg.serialize_to_string())
+            header = struct.pack("<LB", msg_size + 1, msg_type)
+            self._stream.sendall(b"".join([header, msg_str]))
+
+    def set_compression(self, algorithm):
+        """Creates a :class:`mysqlx.protocol.Compressor` object based on the
+        compression algorithm.
+
+        Args:
+            algorithm (str): Compression algorithm.
+        """
+        self._compressor = Compressor(algorithm) if algorithm else None
+
+
+class Protocol(object):
+    """Implements the MySQL X Protocol.
+
+    Args:
+        read (mysqlx.protocol.MessageReader): A Message Reader object.
+        writer (mysqlx.protocol.MessageWriter): A Message Writer object.
+
+    .. versionchanged:: 8.0.21
+    """
+    def __init__(self, reader, writer):
+        self._reader = reader
+        self._writer = writer
+        self._compression_algorithm = None
+
+    @property
+    def compression_algorithm(self):
+        """str: The compresion algorithm.
+        """
+        return self._compression_algorithm
+
+    def _apply_filter(self, msg, stmt):
+        """Apply filter.
+
+        Args:
+            msg (mysqlx.protobuf.Message): The MySQL X Protobuf Message.
+            stmt (Statement): A `Statement` based type object.
+        """
+        if stmt.has_where:
+            msg["criteria"] = stmt.get_where_expr()
+        if stmt.has_sort:
+            msg["order"].extend(stmt.get_sort_expr())
+        if stmt.has_group_by:
+            msg["grouping"].extend(stmt.get_grouping())
+        if stmt.has_having:
+            msg["grouping_criteria"] = stmt.get_having()
+
+    def _create_any(self, arg):
+        """Create any.
+
+        Args:
+            arg (object): Arbitrary object.
+
+        Returns:
+            mysqlx.protobuf.Message: MySQL X Protobuf Message.
+        """
+        if isinstance(arg, STRING_TYPES):
+            value = Message("Mysqlx.Datatypes.Scalar.String", value=arg)
+            scalar = Message("Mysqlx.Datatypes.Scalar", type=8, v_string=value)
+            return Message("Mysqlx.Datatypes.Any", type=1, scalar=scalar)
+        elif isinstance(arg, bool):
+            return Message("Mysqlx.Datatypes.Any", type=1,
+                           scalar=build_bool_scalar(arg))
+        elif isinstance(arg, INT_TYPES):
+            if arg < 0:
+                return Message("Mysqlx.Datatypes.Any", type=1,
+                               scalar=build_int_scalar(arg))
+            return Message("Mysqlx.Datatypes.Any", type=1,
+                           scalar=build_unsigned_int_scalar(arg))
+        elif isinstance(arg, tuple) and len(arg) == 2:
+            arg_key, arg_value = arg
+            obj_fld = Message("Mysqlx.Datatypes.Object.ObjectField",
+                              key=arg_key, value=self._create_any(arg_value))
+            obj = Message("Mysqlx.Datatypes.Object",
+                          fld=[obj_fld.get_message()])
+            return Message("Mysqlx.Datatypes.Any", type=2, obj=obj)
+        elif isinstance(arg, dict) or (isinstance(arg, (list, tuple)) and
+                                       isinstance(arg[0], dict)):
+            array_values = []
+            for items in arg:
+                obj_flds = []
+                for key, value in items.items():
+                    # Array can only handle Any types, Mysqlx.Datatypes.Any.obj
+                    obj_fld = Message("Mysqlx.Datatypes.Object.ObjectField",
+                                      key=key, value=self._create_any(value))
+                    obj_flds.append(obj_fld.get_message())
+                msg_obj = Message("Mysqlx.Datatypes.Object", fld=obj_flds)
+                msg_any = Message("Mysqlx.Datatypes.Any", type=2, obj=msg_obj)
+                array_values.append(msg_any.get_message())
+
+            msg = Message("Mysqlx.Datatypes.Array")
+            msg["value"] = array_values
+            return Message("Mysqlx.Datatypes.Any", type=3, array=msg)
+        elif isinstance(arg, list):
+            obj_flds = []
+            for key, value in arg:
+                obj_fld = Message("Mysqlx.Datatypes.Object.ObjectField",
+                                  key=key, value=self._create_any(value))
+                obj_flds.append(obj_fld.get_message())
+            msg_obj = Message("Mysqlx.Datatypes.Object", fld=obj_flds)
+            msg_any = Message("Mysqlx.Datatypes.Any", type=2, obj=msg_obj)
+            return msg_any
+
+        return None
+
+    def _get_binding_args(self, stmt, is_scalar=True):
+        """Returns the binding any/scalar.
+
+        Args:
+            stmt (Statement): A `Statement` based type object.
+            is_scalar (bool): `True` to return scalar values.
+
+        Raises:
+            :class:`mysqlx.ProgrammingError`: If unable to find placeholder for
+                                              parameter.
+
+        Returns:
+            list: A list of ``Any`` or ``Scalar`` objects.
+        """
+        build_value = lambda value: build_scalar(value).get_message() \
+            if is_scalar else self._create_any(value).get_message()
+        bindings = stmt.get_bindings()
+        binding_map = stmt.get_binding_map()
+
+        # If binding_map is None it's a SqlStatement object
+        if binding_map is None:
+            return [build_value(value) for value in bindings]
+
+        count = len(binding_map)
+        args = count * [None]
+        if count != len(bindings):
+            raise ProgrammingError("The number of bind parameters and "
+                                   "placeholders do not match")
+        for name, value in bindings.items():
+            if name not in binding_map:
+                raise ProgrammingError("Unable to find placeholder for "
+                                       "parameter: {0}".format(name))
+            pos = binding_map[name]
+            args[pos] = build_value(value)
+        return args
+
+    def _process_frame(self, msg, result):
+        """Process frame.
+
+        Args:
+            msg (mysqlx.protobuf.Message): A MySQL X Protobuf Message.
+            result (Result): A `Result` based type object.
+        """
+        if msg["type"] == 1:
+            warn_msg = Message.from_message("Mysqlx.Notice.Warning",
+                                            msg["payload"])
+            result.append_warning(warn_msg.level, warn_msg.code, warn_msg.msg)
+        elif msg["type"] == 2:
+            Message.from_message("Mysqlx.Notice.SessionVariableChanged",
+                                 msg["payload"])
+        elif msg["type"] == 3:
+            sess_state_msg = Message.from_message(
+                "Mysqlx.Notice.SessionStateChanged", msg["payload"])
+            if sess_state_msg["param"] == mysqlxpb_enum(
+                    "Mysqlx.Notice.SessionStateChanged.Parameter."
+                    "GENERATED_DOCUMENT_IDS"):
+                result.set_generated_ids(
+                    [get_item_or_attr(
+                        get_item_or_attr(value, 'v_octets'), 'value').decode()
+                     for value in sess_state_msg["value"]])
+            else:  # Following results are unitary and not a list
+                sess_state_value = sess_state_msg["value"][0] \
+                    if isinstance(sess_state_msg["value"],
+                                  tuple(PROTOBUF_REPEATED_TYPES)) \
+                    else sess_state_msg["value"]
+                if sess_state_msg["param"] == mysqlxpb_enum(
+                        "Mysqlx.Notice.SessionStateChanged.Parameter."
+                        "ROWS_AFFECTED"):
+                    result.set_rows_affected(
+                        get_item_or_attr(sess_state_value, "v_unsigned_int"))
+                elif sess_state_msg["param"] == mysqlxpb_enum(
+                        "Mysqlx.Notice.SessionStateChanged.Parameter."
+                        "GENERATED_INSERT_ID"):
+                    result.set_generated_insert_id(get_item_or_attr(
+                        sess_state_value, "v_unsigned_int"))
+
+    def _read_message(self, result):
+        """Read message.
+
+        Args:
+            result (Result): A `Result` based type object.
+        """
+        while True:
+            msg = self._reader.read_message()
+            if msg.type == "Mysqlx.Error":
+                raise OperationalError(msg["msg"], msg["code"])
+            elif msg.type == "Mysqlx.Notice.Frame":
+                try:
+                    self._process_frame(msg, result)
+                except:
+                    continue
+            elif msg.type == "Mysqlx.Sql.StmtExecuteOk":
+                return None
+            elif msg.type == "Mysqlx.Resultset.FetchDone":
+                result.set_closed(True)
+            elif msg.type == "Mysqlx.Resultset.FetchDoneMoreResultsets":
+                result.set_has_more_results(True)
+            elif msg.type == "Mysqlx.Resultset.Row":
+                result.set_has_data(True)
+                break
+            else:
+                break
+        return msg
+
+    def set_compression(self, algorithm):
+        """Sets the compression algorithm to be used by the compression
+        object, for uplink and downlink.
+
+        Args:
+            algorithm (str): Algorithm to be used in compression/decompression.
+
+        .. versionadded:: 8.0.21
+
+        """
+        self._compression_algorithm = algorithm
+        self._reader.set_compression(algorithm)
+        self._writer.set_compression(algorithm)
+
+    def get_capabilites(self):
+        """Get capabilities.
+
+        Returns:
+            mysqlx.protobuf.Message: MySQL X Protobuf Message.
+        """
+        msg = Message("Mysqlx.Connection.CapabilitiesGet")
+        self._writer.write_message(
+            mysqlxpb_enum("Mysqlx.ClientMessages.Type.CON_CAPABILITIES_GET"),
+            msg)
+        msg = self._reader.read_message()
+        while msg.type == "Mysqlx.Notice.Frame":
+            msg = self._reader.read_message()
+
+        if msg.type == "Mysqlx.Error":
+            raise OperationalError(msg["msg"], msg["code"])
+
+        return msg
+
+    def set_capabilities(self, **kwargs):
+        """Set capabilities.
+
+        Args:
+            **kwargs: Arbitrary keyword arguments.
+
+        Returns:
+            mysqlx.protobuf.Message: MySQL X Protobuf Message.
+        """
+        if not kwargs:
+            return
+        capabilities = Message("Mysqlx.Connection.Capabilities")
+        for key, value in kwargs.items():
+            capability = Message("Mysqlx.Connection.Capability")
+            capability["name"] = key
+            if isinstance(value, dict):
+                items = value
+                obj_flds = []
+                for item in items:
+                    obj_fld = Message("Mysqlx.Datatypes.Object.ObjectField",
+                                      key=item,
+                                      value=self._create_any(items[item]))
+                    obj_flds.append(obj_fld.get_message())
+                msg_obj = Message("Mysqlx.Datatypes.Object", fld=obj_flds)
+                msg_any = Message("Mysqlx.Datatypes.Any", type=2, obj=msg_obj)
+                capability["value"] = msg_any.get_message()
+            else:
+                capability["value"] = self._create_any(value)
+
+            capabilities["capabilities"].extend([capability.get_message()])
+        msg = Message("Mysqlx.Connection.CapabilitiesSet")
+        msg["capabilities"] = capabilities
+        self._writer.write_message(
+            mysqlxpb_enum("Mysqlx.ClientMessages.Type.CON_CAPABILITIES_SET"),
+            msg)
+
+        try:
+            return self.read_ok()
+        except InterfaceError as err:
+            # Skip capability "session_connect_attrs" error since
+            # is only available on version >= 8.0.16
+            if err.errno != 5002:
+                raise
+        return None
+
+    def send_auth_start(self, method, auth_data=None, initial_response=None):
+        """Send authenticate start.
+
+        Args:
+            method (str): Message method.
+            auth_data (Optional[str]): Authentication data.
+            initial_response (Optional[str]): Initial response.
+        """
+        msg = Message("Mysqlx.Session.AuthenticateStart")
+        msg["mech_name"] = method
+        if auth_data is not None:
+            msg["auth_data"] = auth_data
+        if initial_response is not None:
+            msg["initial_response"] = initial_response
+        self._writer.write_message(mysqlxpb_enum(
+            "Mysqlx.ClientMessages.Type.SESS_AUTHENTICATE_START"), msg)
+
+    def read_auth_continue(self):
+        """Read authenticate continue.
+
+        Raises:
+            :class:`InterfaceError`: If the message type is not
+                                     `Mysqlx.Session.AuthenticateContinue`
+
+        Returns:
+            str: The authentication data.
+        """
+        msg = self._reader.read_message()
+        while msg.type == "Mysqlx.Notice.Frame":
+            msg = self._reader.read_message()
+        if msg.type != "Mysqlx.Session.AuthenticateContinue":
+            raise InterfaceError("Unexpected message encountered during "
+                                 "authentication handshake")
+        return msg["auth_data"]
+
+    def send_auth_continue(self, auth_data):
+        """Send authenticate continue.
+
+        Args:
+            auth_data (str): Authentication data.
+        """
+        msg = Message("Mysqlx.Session.AuthenticateContinue",
+                      auth_data=auth_data)
+        self._writer.write_message(mysqlxpb_enum(
+            "Mysqlx.ClientMessages.Type.SESS_AUTHENTICATE_CONTINUE"), msg)
+
+    def read_auth_ok(self):
+        """Read authenticate OK.
+
+        Raises:
+            :class:`mysqlx.InterfaceError`: If message type is `Mysqlx.Error`.
+        """
+        while True:
+            msg = self._reader.read_message()
+            if msg.type == "Mysqlx.Session.AuthenticateOk":
+                break
+            if msg.type == "Mysqlx.Error":
+                raise InterfaceError(msg.msg)
+
+    def send_prepare_prepare(self, msg_type, msg, stmt):
+        """
+        Send prepare statement.
+
+        Args:
+            msg_type (str): Message ID string.
+            msg (mysqlx.protobuf.Message): MySQL X Protobuf Message.
+            stmt (Statement): A `Statement` based type object.
+
+        Raises:
+            :class:`mysqlx.NotSupportedError`: If prepared statements are not
+                                               supported.
+
+        .. versionadded:: 8.0.16
+        """
+        if stmt.has_limit and msg.type != "Mysqlx.Crud.Insert":
+            # Remove 'limit' from message by building a new one
+            if msg.type == "Mysqlx.Crud.Find":
+                _, msg = self.build_find(stmt)
+            elif msg.type == "Mysqlx.Crud.Update":
+                _, msg = self.build_update(stmt)
+            elif msg.type == "Mysqlx.Crud.Delete":
+                _, msg = self.build_delete(stmt)
+            else:
+                raise ValueError("Invalid message type: {}".format(msg_type))
+            # Build 'limit_expr' message
+            position = len(stmt.get_bindings())
+            placeholder = mysqlxpb_enum("Mysqlx.Expr.Expr.Type.PLACEHOLDER")
+            msg_limit_expr = Message("Mysqlx.Crud.LimitExpr")
+            msg_limit_expr["row_count"] = Message("Mysqlx.Expr.Expr",
+                                                  type=placeholder,
+                                                  position=position)
+            if msg.type == "Mysqlx.Crud.Find":
+                msg_limit_expr["offset"] = Message("Mysqlx.Expr.Expr",
+                                                   type=placeholder,
+                                                   position=position + 1)
+            msg["limit_expr"] = msg_limit_expr
+
+        oneof_type, oneof_op = CRUD_PREPARE_MAPPING[msg_type]
+        msg_oneof = Message("Mysqlx.Prepare.Prepare.OneOfMessage")
+        msg_oneof["type"] = mysqlxpb_enum(oneof_type)
+        msg_oneof[oneof_op] = msg
+        msg_prepare = Message("Mysqlx.Prepare.Prepare")
+        msg_prepare["stmt_id"] = stmt.stmt_id
+        msg_prepare["stmt"] = msg_oneof
+
+        self._writer.write_message(
+            mysqlxpb_enum("Mysqlx.ClientMessages.Type.PREPARE_PREPARE"),
+            msg_prepare)
+
+        try:
+            self.read_ok()
+        except InterfaceError:
+            raise NotSupportedError
+
+    def send_prepare_execute(self, msg_type, msg, stmt):
+        """
+        Send execute statement.
+
+        Args:
+            msg_type (str): Message ID string.
+            msg (mysqlx.protobuf.Message): MySQL X Protobuf Message.
+            stmt (Statement): A `Statement` based type object.
+
+        .. versionadded:: 8.0.16
+        """
+        oneof_type, oneof_op = CRUD_PREPARE_MAPPING[msg_type]
+        msg_oneof = Message("Mysqlx.Prepare.Prepare.OneOfMessage")
+        msg_oneof["type"] = mysqlxpb_enum(oneof_type)
+        msg_oneof[oneof_op] = msg
+        msg_execute = Message("Mysqlx.Prepare.Execute")
+        msg_execute["stmt_id"] = stmt.stmt_id
+
+        args = self._get_binding_args(stmt, is_scalar=False)
+        if args:
+            msg_execute["args"].extend(args)
+
+        if stmt.has_limit:
+            msg_execute["args"].extend([
+                self._create_any(stmt.get_limit_row_count()).get_message(),
+                self._create_any(stmt.get_limit_offset()).get_message()
+            ])
+
+        self._writer.write_message(
+            mysqlxpb_enum("Mysqlx.ClientMessages.Type.PREPARE_EXECUTE"),
+            msg_execute)
+
+    def send_prepare_deallocate(self, stmt_id):
+        """
+        Send prepare deallocate statement.
+
+        Args:
+            stmt_id (int): Statement ID.
+
+        .. versionadded:: 8.0.16
+        """
+        msg_dealloc = Message("Mysqlx.Prepare.Deallocate")
+        msg_dealloc["stmt_id"] = stmt_id
+        self._writer.write_message(
+            mysqlxpb_enum("Mysqlx.ClientMessages.Type.PREPARE_DEALLOCATE"),
+            msg_dealloc)
+        self.read_ok()
+
+    def send_msg_without_ps(self, msg_type, msg, stmt):
+        """
+        Send a message without prepared statements support.
+
+        Args:
+            msg_type (str): Message ID string.
+            msg (mysqlx.protobuf.Message): MySQL X Protobuf Message.
+            stmt (Statement): A `Statement` based type object.
+
+        .. versionadded:: 8.0.16
+        """
+        if stmt.has_limit:
+            msg_limit = Message("Mysqlx.Crud.Limit")
+            msg_limit["row_count"] = stmt.get_limit_row_count()
+            if msg.type == "Mysqlx.Crud.Find":
+                msg_limit["offset"] = stmt.get_limit_offset()
+            msg["limit"] = msg_limit
+        is_scalar = False \
+            if msg_type == "Mysqlx.ClientMessages.Type.SQL_STMT_EXECUTE" \
+               else True
+        args = self._get_binding_args(stmt, is_scalar=is_scalar)
+        if args:
+            msg["args"].extend(args)
+        self.send_msg(msg_type, msg)
+
+    def send_msg(self, msg_type, msg):
+        """
+        Send a message.
+
+        Args:
+            msg_type (str): Message ID string.
+            msg (mysqlx.protobuf.Message): MySQL X Protobuf Message.
+
+        .. versionadded:: 8.0.16
+        """
+        self._writer.write_message(mysqlxpb_enum(msg_type), msg)
+
+    def build_find(self, stmt):
+        """Build find/read message.
+
+        Args:
+            stmt (Statement): A :class:`mysqlx.ReadStatement` or
+                              :class:`mysqlx.FindStatement` object.
+
+        Returns:
+            (tuple): Tuple containing:
+
+                * `str`: Message ID string.
+                * :class:`mysqlx.protobuf.Message`: MySQL X Protobuf Message.
+
+        .. versionadded:: 8.0.16
+        """
+        data_model = mysqlxpb_enum("Mysqlx.Crud.DataModel.DOCUMENT"
+                                   if stmt.is_doc_based() else
+                                   "Mysqlx.Crud.DataModel.TABLE")
+        collection = Message("Mysqlx.Crud.Collection",
+                             name=stmt.target.name,
+                             schema=stmt.schema.name)
+        msg = Message("Mysqlx.Crud.Find", data_model=data_model,
+                      collection=collection)
+        if stmt.has_projection:
+            msg["projection"] = stmt.get_projection_expr()
+        self._apply_filter(msg, stmt)
+
+        if stmt.is_lock_exclusive():
+            msg["locking"] = \
+                mysqlxpb_enum("Mysqlx.Crud.Find.RowLock.EXCLUSIVE_LOCK")
+        elif stmt.is_lock_shared():
+            msg["locking"] = \
+                mysqlxpb_enum("Mysqlx.Crud.Find.RowLock.SHARED_LOCK")
+
+        if stmt.lock_contention > 0:
+            msg["locking_options"] = stmt.lock_contention
+
+        return "Mysqlx.ClientMessages.Type.CRUD_FIND", msg
+
+    def build_update(self, stmt):
+        """Build update message.
+
+        Args:
+            stmt (Statement): A :class:`mysqlx.ModifyStatement` or
+                              :class:`mysqlx.UpdateStatement` object.
+
+        Returns:
+            (tuple): Tuple containing:
+
+                * `str`: Message ID string.
+                * :class:`mysqlx.protobuf.Message`: MySQL X Protobuf Message.
+
+        .. versionadded:: 8.0.16
+        """
+        data_model = mysqlxpb_enum("Mysqlx.Crud.DataModel.DOCUMENT"
+                                   if stmt.is_doc_based() else
+                                   "Mysqlx.Crud.DataModel.TABLE")
+        collection = Message("Mysqlx.Crud.Collection",
+                             name=stmt.target.name,
+                             schema=stmt.schema.name)
+        msg = Message("Mysqlx.Crud.Update", data_model=data_model,
+                      collection=collection)
+        self._apply_filter(msg, stmt)
+        for _, update_op in stmt.get_update_ops().items():
+            operation = Message("Mysqlx.Crud.UpdateOperation")
+            operation["operation"] = update_op.update_type
+            operation["source"] = update_op.source
+            if update_op.value is not None:
+                operation["value"] = build_expr(update_op.value)
+            msg["operation"].extend([operation.get_message()])
+
+        return "Mysqlx.ClientMessages.Type.CRUD_UPDATE", msg
+
+    def build_delete(self, stmt):
+        """Build delete message.
+
+        Args:
+            stmt (Statement): A :class:`mysqlx.DeleteStatement` or
+                              :class:`mysqlx.RemoveStatement` object.
+
+        Returns:
+            (tuple): Tuple containing:
+
+                * `str`: Message ID string.
+                * :class:`mysqlx.protobuf.Message`: MySQL X Protobuf Message.
+
+        .. versionadded:: 8.0.16
+        """
+        data_model = mysqlxpb_enum("Mysqlx.Crud.DataModel.DOCUMENT"
+                                   if stmt.is_doc_based() else
+                                   "Mysqlx.Crud.DataModel.TABLE")
+        collection = Message("Mysqlx.Crud.Collection", name=stmt.target.name,
+                             schema=stmt.schema.name)
+        msg = Message("Mysqlx.Crud.Delete", data_model=data_model,
+                      collection=collection)
+        self._apply_filter(msg, stmt)
+        return "Mysqlx.ClientMessages.Type.CRUD_DELETE", msg
+
+    def build_execute_statement(self, namespace, stmt, fields=None):
+        """Build execute statement.
+
+        Args:
+            namespace (str): The namespace.
+            stmt (Statement): A `Statement` based type object.
+            fields (Optional[dict]): The message fields.
+
+        Returns:
+            (tuple): Tuple containing:
+
+                * `str`: Message ID string.
+                * :class:`mysqlx.protobuf.Message`: MySQL X Protobuf Message.
+
+        .. versionadded:: 8.0.16
+        """
+        msg = Message("Mysqlx.Sql.StmtExecute", namespace=namespace, stmt=stmt,
+                      compact_metadata=False)
+
+        if fields:
+            obj_flds = []
+            for key, value in fields.items():
+                obj_fld = Message("Mysqlx.Datatypes.Object.ObjectField",
+                                  key=key, value=self._create_any(value))
+                obj_flds.append(obj_fld.get_message())
+            msg_obj = Message("Mysqlx.Datatypes.Object", fld=obj_flds)
+            msg_any = Message("Mysqlx.Datatypes.Any", type=2, obj=msg_obj)
+            msg["args"] = [msg_any.get_message()]
+        return "Mysqlx.ClientMessages.Type.SQL_STMT_EXECUTE", msg
+
+    def build_insert(self, stmt):
+        """Build insert statement.
+
+        Args:
+            stmt (Statement): A :class:`mysqlx.AddStatement` or
+                              :class:`mysqlx.InsertStatement` object.
+
+        Returns:
+            (tuple): Tuple containing:
+
+                * `str`: Message ID string.
+                * :class:`mysqlx.protobuf.Message`: MySQL X Protobuf Message.
+
+        .. versionadded:: 8.0.16
+        """
+        data_model = mysqlxpb_enum("Mysqlx.Crud.DataModel.DOCUMENT"
+                                   if stmt.is_doc_based() else
+                                   "Mysqlx.Crud.DataModel.TABLE")
+        collection = Message("Mysqlx.Crud.Collection",
+                             name=stmt.target.name,
+                             schema=stmt.schema.name)
+        msg = Message("Mysqlx.Crud.Insert", data_model=data_model,
+                      collection=collection)
+
+        if hasattr(stmt, "_fields"):
+            for field in stmt._fields:
+                expr = ExprParser(field, not stmt.is_doc_based()) \
+                    .parse_table_insert_field()
+                msg["projection"].extend([expr.get_message()])
+
+        for value in stmt.get_values():
+            row = Message("Mysqlx.Crud.Insert.TypedRow")
+            if isinstance(value, list):
+                for val in value:
+                    row["field"].extend([build_expr(val).get_message()])
+            else:
+                row["field"].extend([build_expr(value).get_message()])
+            msg["row"].extend([row.get_message()])
+
+        if hasattr(stmt, "is_upsert"):
+            msg["upsert"] = stmt.is_upsert()
+
+        return "Mysqlx.ClientMessages.Type.CRUD_INSERT", msg
+
+    def close_result(self, result):
+        """Close the result.
+
+        Args:
+            result (Result): A `Result` based type object.
+
+        Raises:
+            :class:`mysqlx.OperationalError`: If message read is None.
+        """
+        msg = self._read_message(result)
+        if msg is not None:
+            raise OperationalError("Expected to close the result")
+
+    def read_row(self, result):
+        """Read row.
+
+        Args:
+            result (Result): A `Result` based type object.
+        """
+        msg = self._read_message(result)
+        if msg is None:
+            return None
+        if msg.type == "Mysqlx.Resultset.Row":
+            return msg
+        self._reader.push_message(msg)
+        return None
+
+    def get_column_metadata(self, result):
+        """Returns column metadata.
+
+        Args:
+            result (Result): A `Result` based type object.
+
+        Raises:
+            :class:`mysqlx.InterfaceError`: If unexpected message.
+        """
+        columns = []
+        while True:
+            msg = self._read_message(result)
+            if msg is None:
+                break
+            if msg.type == "Mysqlx.Resultset.Row":
+                self._reader.push_message(msg)
+                break
+            if msg.type != "Mysqlx.Resultset.ColumnMetaData":
+                raise InterfaceError("Unexpected msg type")
+            col = Column(msg["type"], msg["catalog"], msg["schema"],
+                         msg["table"], msg["original_table"],
+                         msg["name"], msg["original_name"],
+                         msg.get("length", 21),
+                         msg.get("collation", 0),
+                         msg.get("fractional_digits", 0),
+                         msg.get("flags", 16),
+                         msg.get("content_type"))
+            columns.append(col)
+        return columns
+
+    def read_ok(self):
+        """Read OK.
+
+        Raises:
+            :class:`mysqlx.InterfaceError`: If unexpected message.
+        """
+        msg = self._reader.read_message()
+        if msg.type == "Mysqlx.Error":
+            raise InterfaceError("Mysqlx.Error: {}".format(msg["msg"]),
+                                 errno=msg["code"])
+        if msg.type != "Mysqlx.Ok":
+            raise InterfaceError("Unexpected message encountered")
+
+    def send_connection_close(self):
+        """Send connection close."""
+        msg = Message("Mysqlx.Connection.Close")
+        self._writer.write_message(mysqlxpb_enum(
+            "Mysqlx.ClientMessages.Type.CON_CLOSE"), msg)
+
+    def send_close(self):
+        """Send close."""
+        msg = Message("Mysqlx.Session.Close")
+        self._writer.write_message(mysqlxpb_enum(
+            "Mysqlx.ClientMessages.Type.SESS_CLOSE"), msg)
+
+    def send_expect_open(self):
+        """Send expectation."""
+        cond_key = mysqlxpb_enum(
+            "Mysqlx.Expect.Open.Condition.Key.EXPECT_FIELD_EXIST")
+        msg_oc = Message("Mysqlx.Expect.Open.Condition")
+        msg_oc["condition_key"] = cond_key
+        msg_oc["condition_value"] = "6.1"
+
+        msg_eo = Message("Mysqlx.Expect.Open")
+        msg_eo['cond'] = [msg_oc.get_message()]
+
+        self._writer.write_message(mysqlxpb_enum(
+            "Mysqlx.ClientMessages.Type.EXPECT_OPEN"), msg_eo)
+
+    def send_reset(self, keep_open=None):
+        """Send reset session message.
+
+        Returns:
+            boolean: ``True`` if the server will keep the session open,
+                     otherwise ``False``.
+        """
+        msg = Message("Mysqlx.Session.Reset")
+        if keep_open is None:
+            try:
+                # Send expectation: keep connection open
+                self.send_expect_open()
+                self.read_ok()
+                keep_open = True
+            except InterfaceError:
+                # Expectation is unkown by this version of the server
+                keep_open = False
+        if keep_open:
+            msg["keep_open"] = True
+        self._writer.write_message(mysqlxpb_enum(
+            "Mysqlx.ClientMessages.Type.SESS_RESET"), msg)
+        self.read_ok()
+        if keep_open:
+            return True
+        return False
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/result.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/result.py
new file mode 100644
index 0000000..fdc5420
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/result.py
@@ -0,0 +1,1127 @@
+# Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementation of the Result classes."""
+
+import decimal
+import struct
+import sys
+
+from datetime import datetime, timedelta
+
+from .dbdoc import DbDoc
+from .charsets import MYSQL_CHARACTER_SETS
+from .compat import STRING_TYPES
+from .helpers import decode_from_bytes, deprecated
+
+
+# pylint: disable=C0111
+def from_protobuf(col_type, payload):
+    if len(payload) == 0:
+        return None
+
+    try:
+        return {
+            ColumnProtoType.SINT: varsint_from_protobuf,
+            ColumnProtoType.UINT: varint_from_protobuf,
+            ColumnProtoType.BYTES: bytes_from_protobuf,
+            ColumnProtoType.DATETIME: datetime_from_protobuf,
+            ColumnProtoType.TIME: time_from_protobuf,
+            ColumnProtoType.FLOAT: float_from_protobuf,
+            ColumnProtoType.DOUBLE: double_from_protobuf,
+            ColumnProtoType.BIT: varint_from_protobuf,
+            ColumnProtoType.SET: set_from_protobuf,
+            ColumnProtoType.ENUM: bytes_from_protobuf,
+            ColumnProtoType.DECIMAL: decimal_from_protobuf,
+        }[col_type](payload)
+    except KeyError as err:
+        sys.stderr.write("{0}".format(err))
+        sys.stderr.write("{0}".format(payload.encode("hex")))
+        return None
+
+
+def bytes_from_protobuf(payload):
+    # Strip trailing char
+    return decode_from_bytes(payload[:-1])
+
+
+def float_from_protobuf(payload):
+    assert len(payload) == 4
+    return struct.unpack("<f", payload)
+
+
+def double_from_protobuf(payload):
+    assert len(payload) == 8
+    return struct.unpack("<d", payload)
+
+
+def varint_from_protobuf_stream(payload):
+    if len(payload) == 0:
+        raise ValueError("Payload is empty")
+
+    cur = 0
+    i = 0
+    shift = 0
+
+    for item in payload:
+        char = item if isinstance(item, int) else ord(item)
+        eos = (char & 0x80) == 0
+        cur_bits = (char & 0x7f)
+        cur_bits <<= shift
+        i |= cur_bits
+        if eos:
+            return i, payload[cur + 1:]
+        cur += 1
+        shift += 7
+
+    raise EOFError("Payload too short")
+
+
+def varint_from_protobuf(payload):
+    i, payload = varint_from_protobuf_stream(payload)
+    if len(payload) != 0:
+        raise ValueError("Payload too long")
+
+    return i
+
+
+def varsint_from_protobuf(payload):
+    i, payload = varint_from_protobuf_stream(payload)
+    if len(payload) != 0:
+        raise ValueError("Payload too long")
+
+    # Zigzag encoded, revert it
+    if i & 0x1:
+        i = ~i
+        i = (i >> 1)
+        i |= 1 << 63
+    else:
+        i = (i >> 1)
+
+    return i
+
+
+def set_from_protobuf(payload):
+    set_pb = []
+    while True:
+        try:
+            field_len, payload = varint_from_protobuf_stream(payload)
+            if len(payload) < field_len:
+                if len(payload) == 0 and field_len == 1 and len(set_pb) == 0:
+                    # Special case for empty set
+                    return []
+                raise ValueError("Invalid Set encoding")
+
+            set_pb.append(payload[:field_len])
+            payload = payload[field_len:]
+            if len(payload) == 0:
+                # Done
+                break
+        except ValueError:
+            break
+    return set_pb
+
+
+def decimal_from_protobuf(payload):
+    digits = []
+    sign = None
+    scale = payload[0] if isinstance(payload[0], int) else ord(payload[0])
+    payload = payload[1:]
+
+    for item in payload:
+        char = item if isinstance(item, int) else ord(item)
+        high_bcd = (char & 0xf0) >> 4
+        low_bcd = char & 0x0f
+        if high_bcd < 0x0a:
+            digits.append(high_bcd)
+            if low_bcd < 0x0a:
+                digits.append(low_bcd)
+            elif low_bcd == 0x0c:
+                sign = 0
+                break
+            elif low_bcd == 0x0d:
+                sign = 1
+                break
+            else:
+                raise ValueError("Invalid BCD")
+        elif high_bcd == 0x0c:
+            sign = 0
+            assert low_bcd == 0x00
+            break
+        elif high_bcd == 0x0d:
+            sign = 1
+            assert low_bcd == 0x00
+            break
+        else:
+            raise ValueError("Invalid BCD: {0}".format(high_bcd))
+
+    return decimal.Decimal((sign, digits, -scale))
+
+
+def datetime_from_protobuf(payload):
+    # A sequence of varints
+    hour = 0
+    minutes = 0
+    seconds = 0
+    useconds = 0
+    year, payload = varint_from_protobuf_stream(payload)
+    month, payload = varint_from_protobuf_stream(payload)
+    day, payload = varint_from_protobuf_stream(payload)
+
+    try:
+        hour, payload = varint_from_protobuf_stream(payload)
+        minutes, payload = varint_from_protobuf_stream(payload)
+        seconds, payload = varint_from_protobuf_stream(payload)
+        useconds, payload = varint_from_protobuf_stream(payload)
+    except ValueError:
+        pass
+
+    return datetime(year, month, day, hour, minutes, seconds, useconds)
+
+
+def time_from_protobuf(payload):
+    # A sequence of varints
+    hour = 0
+    minutes = 0
+    seconds = 0
+    useconds = 0
+    negate = payload[0] == 1
+    payload = payload[1:]
+
+    try:
+        hour, payload = varint_from_protobuf_stream(payload)
+        minutes, payload = varint_from_protobuf_stream(payload)
+        seconds, payload = varint_from_protobuf_stream(payload)
+        useconds, payload = varint_from_protobuf_stream(payload)
+    except ValueError:
+        pass
+
+    if negate:
+        # Negate the first non-zero value
+        if hour:
+            hour *= -1
+        elif minutes:
+            minutes *= -1
+        elif seconds:
+            seconds *= -1
+        elif useconds:
+            useconds *= -1
+
+    return timedelta(hours=hour, minutes=minutes, seconds=seconds,
+                     microseconds=useconds)
+
+
+class Collations(object):
+    UTF8_GENERAL_CI = 33
+
+
+class ColumnType(object):
+    BIT = 1
+    TINYINT = 2
+    SMALLINT = 3
+    MEDIUMINT = 4
+    INT = 5
+    BIGINT = 6
+    REAL = 7
+    FLOAT = 8
+    DECIMAL = 9
+    NUMERIC = 10
+    DOUBLE = 11
+    JSON = 12
+    STRING = 13
+    BYTES = 14
+    TIME = 15
+    DATE = 16
+    DATETIME = 17
+    TIMESTAMP = 18
+    SET = 19
+    ENUM = 20
+    GEOMETRY = 21
+    XML = 22
+    YEAR = 23
+    CHAR = 24
+    VARCHAR = 25
+    BINARY = 26
+    VARBINARY = 27
+    TINYBLOB = 28
+    BLOB = 29
+    MEDIUMBLOB = 30
+    LONGBLOB = 31
+    TINYTEXT = 32
+    TEXT = 33
+    MEDIUMTEXT = 34
+    LONGTEXT = 35
+
+    @classmethod
+    def to_string(cls, needle):
+        for key, value in vars(cls).items():
+            if value == needle:
+                return key
+        return None
+
+    @classmethod
+    def from_string(cls, key):
+        return getattr(cls, key.upper(), None)
+
+    @classmethod
+    def is_char(cls, col_type):
+        return col_type in (cls.CHAR, cls.VARCHAR,)
+
+    @classmethod
+    def is_binary(cls, col_type):
+        return col_type in (cls.BINARY, cls.VARBINARY,)
+
+    @classmethod
+    def is_text(cls, col_type):
+        return col_type in (cls.TEXT, cls.TINYTEXT, cls.MEDIUMTEXT,
+                            cls.LONGTEXT,)
+
+    @classmethod
+    def is_decimals(cls, col_type):
+        return col_type in (cls.REAL, cls.DOUBLE, cls.FLOAT, cls.DECIMAL,
+                            cls.NUMERIC,)
+
+    @classmethod
+    def is_numeric(cls, col_type):
+        return col_type in (cls.BIT, cls.TINYINT, cls.SMALLINT, cls.MEDIUMINT,
+                            cls.INT, cls.BIGINT,)
+
+    @classmethod
+    def is_finite_set(cls, col_type):
+        return col_type in (cls.SET, cls.ENUM,)
+
+
+class ColumnProtoType(object):
+    SINT = 1
+    UINT = 2
+    DOUBLE = 5
+    FLOAT = 6
+    BYTES = 7
+    TIME = 10
+    DATETIME = 12
+    SET = 15
+    ENUM = 16
+    BIT = 17
+    DECIMAL = 18
+
+
+class Flags(object):
+    def __init__(self, value):
+        self._allowed_flags = {}
+        self._flag_names = {}
+        for key, val in self.__class__.__dict__.items():
+            if key.startswith("__"):
+                continue
+            if isinstance(val, int):
+                self._allowed_flags[key] = val
+                self._flag_names[val] = key
+        self._value = value
+
+    def __str__(self):
+        mask = 1
+        flag_names = []
+        value = self._value
+
+        for _ in range(0, 63):
+            mask <<= 1
+            flag = value & mask
+            if flag:
+                # We matched something, find the name for it
+                try:
+                    flag_names.append(self._flag_names[flag])
+                except KeyError:
+                    sys.stderr.write("{0}".format(self._flag_names))
+                    sys.stderr.write("{0}".format(self.__class__.__dict__))
+
+        return ",".join(flag_names)
+
+    @property
+    def value(self):
+        return self._value
+
+    @value.setter
+    def value(self, val):
+        self._value = val
+
+
+class ColumnFlags(Flags):
+    NOT_NULL = 0x0010
+    PRIMARY_KEY = 0x0020
+    UNIQUE_KEY = 0x0040
+    MULTIPLE_KEY = 0x0080
+    AUTO_INCREMENT = 0x0100
+
+
+class DatetimeColumnFlags(ColumnFlags):
+    TIMESTAMP = 0x0001
+
+
+class UIntColumnFlags(ColumnFlags):
+    ZEROFILL = 0x0001
+
+
+class DoubleColumnFlags(ColumnFlags):
+    UNSIGNED = 0x0001
+
+
+class FloatColumnFlags(ColumnFlags):
+    UNSIGNED = 0x0001
+
+
+class BytesColumnFlags(ColumnFlags):
+    RIGHT_PAD = 0x0001
+
+
+class BytesContentType(ColumnFlags):
+    GEOMETRY = 0x0001
+    JSON = 0x0002
+    XML = 0x0003
+# pylint: enable=C0111
+
+
+class Column(object):
+    """Represents meta data for a table column.
+
+    Args:
+        col_type (int): The column type.
+        catalog (str): The catalog.
+        schema (str): The schema name.
+        table (str): The table name.
+        original_table (str): The original table name.
+        name (str): The column name.
+        original_name (str): The original table name.
+        length (int): The column length,
+        collation (str): The collation name.
+        fractional_digits (int): The fractional digits.
+        flags (int): The flags.
+        content_type (int): The content type.
+
+    .. versionchanged:: 8.0.12
+    """
+    def __init__(self, col_type, catalog=None, schema=None, table=None,
+                 original_table=None, name=None, original_name=None,
+                 length=None, collation=None, fractional_digits=None,
+                 flags=None, content_type=None):
+        self._schema = decode_from_bytes(schema)
+        self._name = decode_from_bytes(name)
+        self._original_name = decode_from_bytes(original_name)
+        self._table = decode_from_bytes(table)
+        self._original_table = decode_from_bytes(original_table)
+        self._proto_type = col_type
+        self._col_type = None
+        self._catalog = catalog
+        self._length = length
+        self._collation = collation
+        self._fractional_digits = fractional_digits
+        self._flags = flags
+        self._content_type = content_type
+        self._number_signed = False
+        self._is_padded = False
+        self._is_binary = False
+        self._is_bytes = False
+        self._collation_name = None
+        self._character_set_name = None
+        self._zero_fill = None
+
+        if self._collation > 0:
+            if self._collation >= len(MYSQL_CHARACTER_SETS):
+                raise ValueError("No mapping found for collation {0}"
+                                 "".format(self._collation))
+            info = MYSQL_CHARACTER_SETS[self._collation]
+            self._character_set_name = info[0]
+            self._collation_name = info[1]
+            self._is_binary = ("binary" in self._collation_name or
+                               "_bin" in self._collation_name)
+        self._map_type()
+        self._is_bytes = self._col_type in (
+            ColumnType.GEOMETRY, ColumnType.JSON, ColumnType.XML,
+            ColumnType.BYTES, ColumnType.STRING)
+
+    def __str__(self):
+        return str({
+            "col_type": self._col_type,
+            "schema": self._schema,
+            "table": self._table,
+            "flags": str(self._flags),
+        })
+
+    def _map_bytes(self):
+        """Map bytes."""
+        if self._content_type == BytesContentType.GEOMETRY:
+            self._col_type = ColumnType.GEOMETRY
+        elif self._content_type == BytesContentType.JSON:
+            self._col_type = ColumnType.JSON
+        elif self._content_type == BytesContentType.XML:
+            self._col_type = ColumnType.XML
+        elif self._is_binary:
+            self._col_type = ColumnType.BYTES
+        else:
+            self._col_type = ColumnType.STRING
+        self._is_padded = self._flags & 1
+
+    def _map_datetime(self):
+        """Map datetime."""
+        if self._length == 10:
+            self._col_type = ColumnType.DATE
+        elif self._flags & DatetimeColumnFlags.TIMESTAMP > 0:
+            self._col_type = ColumnType.TIMESTAMP
+        elif self._length >= 19:
+            self._col_type = ColumnType.DATETIME
+        else:
+            raise ValueError("Datetime mapping scenario unhandled")
+
+    def _map_int_type(self):
+        """Map int type."""
+        if self._length <= 4:
+            self._col_type = ColumnType.TINYINT
+        elif self._length <= 6:
+            self._col_type = ColumnType.SMALLINT
+        elif self._length <= 9:
+            self._col_type = ColumnType.MEDIUMINT
+        elif self._length <= 11:
+            self._col_type = ColumnType.INT
+        else:
+            self._col_type = ColumnType.BIGINT
+        self._number_signed = True
+
+    def _map_uint_type(self):
+        """Map uint type."""
+        if self._length <= 3:
+            self._col_type = ColumnType.TINYINT
+        elif self._length <= 5:
+            self._col_type = ColumnType.SMALLINT
+        elif self._length <= 8:
+            self._col_type = ColumnType.MEDIUMINT
+        elif self._length <= 10:
+            self._col_type = ColumnType.INT
+        else:
+            self._col_type = ColumnType.BIGINT
+        self._zero_fill = self._flags & 1
+
+    def _map_type(self):
+        """Map type."""
+        if self._proto_type == ColumnProtoType.SINT:
+            self._map_int_type()
+        elif self._proto_type == ColumnProtoType.UINT:
+            self._map_uint_type()
+        elif self._proto_type == ColumnProtoType.FLOAT:
+            self._col_type = ColumnType.FLOAT
+            self._is_number_signed = \
+                (self._flags & FloatColumnFlags.UNSIGNED) == 0
+        elif self._proto_type == ColumnProtoType.DECIMAL:
+            self._col_type = ColumnType.DECIMAL
+            self._is_number_signed = \
+                (self._flags & FloatColumnFlags.UNSIGNED) == 0
+        elif self._proto_type == ColumnProtoType.DOUBLE:
+            self._col_type = ColumnType.DOUBLE
+            self._is_number_signed = \
+                (self._flags & FloatColumnFlags.UNSIGNED) == 0
+        elif self._proto_type == ColumnProtoType.BYTES:
+            self._map_bytes()
+        elif self._proto_type == ColumnProtoType.TIME:
+            self._col_type = ColumnType.TIME
+        elif self._proto_type == ColumnProtoType.DATETIME:
+            self._map_datetime()
+        elif self._proto_type == ColumnProtoType.SET:
+            self._col_type = ColumnType.SET
+        elif self._proto_type == ColumnProtoType.ENUM:
+            self._col_type = ColumnType.ENUM
+        elif self._proto_type == ColumnProtoType.BIT:
+            self._col_type = ColumnType.BIT
+        else:
+            raise ValueError("Unknown column type {0}".format(self._proto_type))
+
+    @property
+    def schema_name(self):
+        """str: The schema name.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._schema
+
+    @property
+    def table_name(self):
+        """str: The table name.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._original_table or self._table
+
+    @property
+    def table_label(self):
+        """str: The table label.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._table or self._original_table
+
+    @property
+    def column_name(self):
+        """str: The column name.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._original_name or self._name
+
+    @property
+    def column_label(self):
+        """str: The column label.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._name or self._original_name
+
+    @property
+    def type(self):
+        """int: The column type.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._col_type
+
+    @property
+    def length(self):
+        """int. The column length.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._length
+
+    @property
+    def fractional_digits(self):
+        """int: The column fractional digits.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._fractional_digits
+
+    @property
+    def collation_name(self):
+        """str: The collation name.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._collation_name
+
+    @property
+    def character_set_name(self):
+        """str: The character set name.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._character_set_name
+
+    def get_schema_name(self):
+        """Returns the schema name.
+
+        Returns:
+            str: The schema name.
+        """
+        return self._schema
+
+    def get_table_name(self):
+        """Returns the table name.
+
+        Returns:
+            str: The table name.
+        """
+        return self._original_table or self._table
+
+    def get_table_label(self):
+        """Returns the table label.
+
+        Returns:
+            str: The table label.
+        """
+        return self._table or self._original_table
+
+    def get_column_name(self):
+        """Returns the column name.
+
+        Returns:
+            str: The column name.
+        """
+        return self._original_name or self._name
+
+    def get_column_label(self):
+        """Returns the column label.
+
+        Returns:
+            str: The column label.
+        """
+        return self._name or self._original_name
+
+    def get_proto_type(self):
+        """Returns the column proto type.
+
+        Returns:
+            int: The column proto type.
+        """
+        return self._proto_type
+
+    def get_type(self):
+        """Returns the column type.
+
+        Returns:
+            int: The column type.
+        """
+        return self._col_type
+
+    def get_length(self):
+        """Returns the column length.
+
+        Returns:
+            int: The column length.
+        """
+        return self._length
+
+    def get_fractional_digits(self):
+        """Returns the column fractional digits.
+
+        Returns:
+            int: The column fractional digits.
+        """
+        return self._fractional_digits
+
+    def get_collation_name(self):
+        """Returns the collation name.
+
+        Returns:
+            str: The collation name.
+        """
+        return self._collation_name
+
+    def get_character_set_name(self):
+        """Returns the character set name.
+
+        Returns:
+            str: The character set name.
+        """
+        return self._character_set_name
+
+    def is_number_signed(self):
+        """Returns `True` if is a number signed.
+
+        Returns:
+            bool: Returns `True` if is a number signed.
+        """
+        return self._number_signed
+
+    def is_padded(self):
+        """Returns `True` if is padded.
+
+        Returns:
+            bool: Returns `True` if is padded.
+        """
+        return self._is_padded
+
+    def is_bytes(self):
+        """Returns `True` if is bytes.
+
+        Returns:
+            bool: Returns `True` if is bytes.
+        """
+        return self._is_bytes
+
+
+class Row(object):
+    """Represents a row element returned from a SELECT query.
+
+    Args:
+        rs (mysqlx.SqlResult or mysqlx.RowResult): The result set.
+        fields (`list`): The list of fields.
+    """
+    def __init__(self, rs, fields):
+        self._fields = fields
+        self._resultset = rs
+
+    def __getitem__(self, index):
+        """Returns the value of a column by name or index.
+
+        .. versionchanged:: 8.0.12
+        """
+        int_index = self._resultset.index_of(index) \
+            if isinstance(index, STRING_TYPES) else index
+        if int_index == -1 and isinstance(index, STRING_TYPES):
+            raise ValueError("Column name '{0}' not found".format(index))
+        elif int_index >= len(self._fields) or int_index < 0:
+            raise IndexError("Index out of range")
+        return self._fields[int_index]
+
+    @deprecated("8.0.12")
+    def get_string(self, str_index):
+        """Returns the value using the column name.
+
+        Args:
+            str_index (str): The column name.
+
+        .. deprecated:: 8.0.12
+        """
+        int_index = self._resultset.index_of(str_index)
+        if int_index >= len(self._fields):
+            raise IndexError("Argument out of range")
+        if int_index == -1:
+            raise ValueError("Column name '{0}' not found".format(str_index))
+        return str(self._fields[int_index])
+
+
+class BaseResult(object):
+    """Provides base functionality for result objects.
+
+    Args:
+        connection (mysqlx.connection.Connection): The Connection object.
+    """
+    def __init__(self, connection):
+        self._connection = connection
+        self._closed = False
+        self._rows_affected = 0
+        self._generated_id = -1
+        self._generated_ids = []
+        self._warnings = []
+
+        if connection is None:
+            self._protocol = None
+        else:
+            self._protocol = connection.protocol
+            connection.fetch_active_result()
+
+    def get_affected_items_count(self):
+        """Returns the number of affected items for the last operation.
+
+        Returns:
+            int: The number of affected items.
+        """
+        return self._rows_affected
+
+    def get_warnings(self):
+        """Returns the warnings.
+
+        Returns:
+            `list`: The list of warnings.
+        """
+        return self._warnings
+
+    def get_warnings_count(self):
+        """Returns the number of warnings.
+
+        Returns:
+            int: The number of warnings.
+        """
+        return len(self._warnings)
+
+    def set_closed(self, flag):
+        """Sets if resultset fetch is done.
+        """
+        self._closed = flag
+
+    def append_warning(self, level, code, msg):
+        """Append a warning.
+
+        Args:
+            level (int): The warning level.
+            code (int): The warning code.
+            msg (str): The warning message.
+        """
+        self._warnings.append({"level": level, "code": code, "msg": msg})
+
+    def set_generated_ids(self, generated_ids):
+        """Sets the generated ids.
+        """
+        self._generated_ids = generated_ids
+
+    def set_generated_insert_id(self, generated_id):
+        """Sets the generated insert id.
+        """
+        self._generated_id = generated_id
+
+    def set_rows_affected(self, total):
+        """Sets the number of rows affected.
+        """
+        self._rows_affected = total
+
+
+class Result(BaseResult):
+    """Allows retrieving information about non query operations performed on
+    the database.
+
+    Args:
+        connection (mysqlx.connection.Connection): The Connection object.
+                                                   ids (`list`): A list of IDs.
+    """
+    def __init__(self, connection=None, ids=None):
+        super(Result, self).__init__(connection)
+        self._ids = ids
+
+        if connection is not None:
+            self._connection.close_result(self)
+
+    def get_autoincrement_value(self):
+        """Returns the last insert id auto generated.
+
+        Returns:
+            int: The last insert id.
+        """
+        return self._generated_id
+
+    @deprecated("8.0.12")
+    def get_document_id(self):
+        """Returns ID of the last document inserted into a collection.
+
+        .. deprecated:: 8.0.12
+        """
+        if self._ids is None or len(self._ids) == 0:
+            return None
+        return self._ids[0]
+
+    @deprecated("8.0.12")
+    def get_generated_insert_id(self):
+        """Returns the generated insert id.
+
+        .. deprecated:: 8.0.12
+        """
+        return self._generated_id
+
+    def get_generated_ids(self):
+        """Returns the generated ids.
+        """
+        return self._generated_ids
+
+
+class BufferingResult(BaseResult):
+    """Provides base functionality for buffering result objects.
+
+    Args:
+        connection (mysqlx.connection.Connection): The Connection object.
+                                                   ids (`list`): A list of IDs.
+    """
+    def __init__(self, connection):
+        super(BufferingResult, self).__init__(connection)
+        self._columns = []
+        self._has_data = False
+        self._has_more_results = False
+        self._items = []
+        self._page_size = 0
+        self._position = -1
+        self._init_result()
+
+    def __getitem__(self, index):
+        return self._items[index]
+
+    @property
+    def count(self):
+        """int: The total of items."""
+        return len(self._items)
+
+    def _init_result(self):
+        """Initialize the result."""
+        self._columns = self._connection.get_column_metadata(self)
+        self._has_more_data = True if len(self._columns) > 0 else False
+        self._items = []
+        self._page_size = 20
+        self._position = -1
+        self._connection.set_active_result(self if self._has_more_data
+                                           else None)
+
+    def _read_item(self, dumping):
+        """Read item.
+
+        Args:
+            dumping (bool): `True` for dumping.
+
+        Returns:
+            :class:`mysqlx.Row`: A `Row` object.
+        """
+        row = self._connection.read_row(self)
+        if row is None:
+            return None
+        item = [None] * len(row["field"])
+        if not dumping:
+            for key in range(len(row["field"])):
+                col = self._columns[key]
+                item[key] = from_protobuf(col.get_proto_type(),
+                                          row["field"][key])
+        return Row(self, item)
+
+    def _page_in_items(self):
+        """Reads the page items.
+
+        Returns:
+            int: Total items read.
+        """
+        if self._closed:
+            return False
+
+        count = 0
+        for _ in range(self._page_size):
+            item = self._read_item(False)
+            if item is None:
+                break
+            self._items.append(item)
+            count += 1
+        return count
+
+    def index_of(self, col_name):
+        """Returns the index of the column.
+
+        Returns:
+            int: The index of the column.
+        """
+        index = 0
+        for col in self._columns:
+            if col.get_column_label() == col_name:
+                return index
+            index += 1
+        return -1
+
+    def fetch_one(self):
+        """Fetch one item.
+
+        Returns:
+            :class:`mysqlx.Row` or :class:`mysqlx.DbDoc`: one result item.
+        """
+        if self._closed:
+            return None
+
+        return self._read_item(False)
+
+    def fetch_all(self):
+        """Fetch all items.
+
+        Returns:
+            `list`: The list of items of :class:`mysqlx.DbDoc` or
+                    :class:`mysqlx.Row`.
+        """
+        while True:
+            if not self._page_in_items():
+                break
+        return self._items
+
+    def set_has_data(self, flag):
+        """Sets if result has data.
+
+        Args:
+            flag (bool): `True` if result has data.
+        """
+        self._has_data = flag
+
+    def set_has_more_results(self, flag):
+        """Sets if has more results.
+
+        Args:
+            flag (bool): `True` if has more results.
+        """
+        self._has_more_results = flag
+
+
+class RowResult(BufferingResult):
+    """Allows traversing the Row objects returned by a Table.select operation.
+
+    Args:
+        connection (mysqlx.connection.Connection): The Connection object.
+    """
+    def __init__(self, connection):
+        super(RowResult, self).__init__(connection)
+
+    @property
+    def columns(self):
+        """`list`: The list of columns."""
+        return self._columns
+
+    def get_columns(self):
+        """Returns the list of columns.
+
+        Returns:
+            `list`: The list of columns.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._columns
+
+
+class SqlResult(RowResult):
+    """Represents a result from a SQL statement.
+
+    Args:
+        connection (mysqlx.connection.Connection): The Connection object.
+    """
+    def __init__(self, connection):
+        super(SqlResult, self).__init__(connection)
+
+    def get_autoincrement_value(self):
+        """Returns the identifier for the last record inserted.
+
+        Returns:
+            str: The identifier of the last record inserted.
+        """
+        return self._generated_id
+
+    def next_result(self):
+        """Process the next result.
+
+        Returns:
+            bool: Returns `True` if the fetch is done.
+        """
+        if self._closed:
+            return False
+        self._has_more_results = False
+        self._init_result()
+        return True
+
+    def has_data(self):
+        """Returns True if result has data.
+
+        Returns:
+            bool: Returns `True` if result has data.
+
+        .. versionadded:: 8.0.12
+        """
+        return self._has_data
+
+class DocResult(BufferingResult):
+    """Allows traversing the DbDoc objects returned by a Collection.find
+    operation.
+
+    Args:
+        connection (mysqlx.connection.Connection): The Connection object.
+    """
+    def __init__(self, connection):
+        super(DocResult, self).__init__(connection)
+
+    def _read_item(self, dumping):
+        """Read item.
+
+        Args:
+            dumping (bool): `True` for dumping.
+
+        Returns:
+            :class:`mysqlx.DbDoc`: A `DbDoc` object.
+        """
+        row = super(DocResult, self)._read_item(dumping)
+        if row is None:
+            return None
+        return DbDoc(decode_from_bytes(row[0]))
diff --git a/python3-vckonline/lib/python3.8/site-packages/mysqlx/statement.py b/python3-vckonline/lib/python3.8/site-packages/mysqlx/statement.py
new file mode 100644
index 0000000..886a0d5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/mysqlx/statement.py
@@ -0,0 +1,1436 @@
+# Copyright (c) 2016, 2020, Oracle and/or its affiliates.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0, as
+# published by the Free Software Foundation.
+#
+# This program is also distributed with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an
+# additional permission to link the program and your derivative works
+# with the separately licensed software that they have included with
+# MySQL.
+#
+# Without limiting anything contained in the foregoing, this file,
+# which is part of MySQL Connector/Python, is also subject to the
+# Universal FOSS Exception, version 1.0, a copy of which can be found at
+# http://oss.oracle.com/licenses/universal-foss-exception.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+"""Implementation of Statements."""
+
+import copy
+import json
+import warnings
+
+from .errors import ProgrammingError, NotSupportedError
+from .expr import ExprParser
+from .compat import INT_TYPES, STRING_TYPES
+from .constants import LockContention
+from .dbdoc import DbDoc
+from .helpers import deprecated
+from .result import Result
+from .protobuf import mysqlxpb_enum
+
+ERR_INVALID_INDEX_NAME = 'The given index name "{}" is not valid'
+
+
+class Expr(object):
+    """Expression wrapper."""
+    def __init__(self, expr):
+        self.expr = expr
+
+
+def flexible_params(*values):
+    """Parse flexible parameters."""
+    if len(values) == 1 and isinstance(values[0], (list, tuple,)):
+        return values[0]
+    return values
+
+
+def is_quoted_identifier(identifier, sql_mode=""):
+    """Check if the given identifier is quoted.
+
+    Args:
+        identifier (string): Identifier to check.
+        sql_mode (Optional[string]): SQL mode.
+
+    Returns:
+        `True` if the identifier has backtick quotes, and False otherwise.
+    """
+    if "ANSI_QUOTES" in sql_mode:
+        return ((identifier[0] == "`" and identifier[-1] == "`") or
+                (identifier[0] == '"' and identifier[-1] == '"'))
+    return identifier[0] == "`" and identifier[-1] == "`"
+
+
+def quote_identifier(identifier, sql_mode=""):
+    """Quote the given identifier with backticks, converting backticks (`) in
+    the identifier name with the correct escape sequence (``).
+
+    Args:
+        identifier (string): Identifier to quote.
+        sql_mode (Optional[string]): SQL mode.
+
+    Returns:
+        A string with the identifier quoted with backticks.
+    """
+    if len(identifier) == 0:
+        return "``"
+    if "ANSI_QUOTES" in sql_mode:
+        return '"{0}"'.format(identifier.replace('"', '""'))
+    return "`{0}`".format(identifier.replace("`", "``"))
+
+
+def quote_multipart_identifier(identifiers, sql_mode=""):
+    """Quote the given multi-part identifier with backticks.
+
+    Args:
+        identifiers (iterable): List of identifiers to quote.
+        sql_mode (Optional[string]): SQL mode.
+
+    Returns:
+        A string with the multi-part identifier quoted with backticks.
+    """
+    return ".".join([quote_identifier(identifier, sql_mode)
+                     for identifier in identifiers])
+
+
+def parse_table_name(default_schema, table_name, sql_mode=""):
+    """Parse table name.
+
+    Args:
+        default_schema (str): The default schema.
+        table_name (str): The table name.
+        sql_mode(Optional[str]): The SQL mode.
+
+    Returns:
+        str: The parsed table name.
+    """
+    quote = '"' if "ANSI_QUOTES" in sql_mode else "`"
+    delimiter = ".{0}".format(quote) if quote in table_name else "."
+    temp = table_name.split(delimiter, 1)
+    return (default_schema if len(temp) == 1 else temp[0].strip(quote),
+            temp[-1].strip(quote),)
+
+
+class Statement(object):
+    """Provides base functionality for statement objects.
+
+    Args:
+        target (object): The target database object, it can be
+                         :class:`mysqlx.Collection` or :class:`mysqlx.Table`.
+        doc_based (bool): `True` if it is document based.
+    """
+    def __init__(self, target, doc_based=True):
+        self._target = target
+        self._doc_based = doc_based
+        self._connection = target.get_connection() if target else None
+        self._stmt_id = None
+        self._exec_counter = 0
+        self._changed = True
+        self._prepared = False
+        self._deallocate_prepare_execute = False
+
+    @property
+    def target(self):
+        """object: The database object target."""
+        return self._target
+
+    @property
+    def schema(self):
+        """:class:`mysqlx.Schema`: The Schema object."""
+        return self._target.schema
+
+    @property
+    def stmt_id(self):
+        """Returns this statement ID.
+
+        Returns:
+            int: The statement ID.
+        """
+        return self._stmt_id
+
+    @stmt_id.setter
+    def stmt_id(self, value):
+        self._stmt_id = value
+
+    @property
+    def exec_counter(self):
+        """int: The number of times this statement was executed."""
+        return self._exec_counter
+
+    @property
+    def changed(self):
+        """bool: `True` if this statement has changes."""
+        return self._changed
+
+    @changed.setter
+    def changed(self, value):
+        self._changed = value
+
+    @property
+    def prepared(self):
+        """bool: `True` if this statement has been prepared."""
+        return self._prepared
+
+    @prepared.setter
+    def prepared(self, value):
+        self._prepared = value
+
+    @property
+    def repeated(self):
+        """bool: `True` if this statement was executed more than once.
+        """
+        return self._exec_counter > 1
+
+    @property
+    def deallocate_prepare_execute(self):
+        """bool: `True` to deallocate + prepare + execute statement.
+        """
+        return self._deallocate_prepare_execute
+
+    @deallocate_prepare_execute.setter
+    def deallocate_prepare_execute(self, value):
+        self._deallocate_prepare_execute = value
+
+    def is_doc_based(self):
+        """Check if it is document based.
+
+        Returns:
+            bool: `True` if it is document based.
+        """
+        return self._doc_based
+
+    def increment_exec_counter(self):
+        """Increments the number of times this statement has been executed."""
+        self._exec_counter += 1
+
+    def reset_exec_counter(self):
+        """Resets the number of times this statement has been executed."""
+        self._exec_counter = 0
+
+    def execute(self):
+        """Execute the statement.
+
+        Raises:
+           NotImplementedError: This method must be implemented.
+        """
+        raise NotImplementedError
+
+
+class FilterableStatement(Statement):
+    """A statement to be used with filterable statements.
+
+    Args:
+        target (object): The target database object, it can be
+                         :class:`mysqlx.Collection` or :class:`mysqlx.Table`.
+        doc_based (Optional[bool]): `True` if it is document based
+                                    (default: `True`).
+        condition (Optional[str]): Sets the search condition to filter
+                                   documents or records.
+    """
+    def __init__(self, target, doc_based=True, condition=None):
+        super(FilterableStatement, self).__init__(target=target,
+                                                  doc_based=doc_based)
+        self._binding_map = {}
+        self._bindings = {}
+        self._having = None
+        self._grouping_str = ""
+        self._grouping = None
+        self._limit_offset = 0
+        self._limit_row_count = None
+        self._projection_str = ""
+        self._projection_expr = None
+        self._sort_str = ""
+        self._sort_expr = None
+        self._where_str = ""
+        self._where_expr = None
+        self.has_bindings = False
+        self.has_limit = False
+        self.has_group_by = False
+        self.has_having = False
+        self.has_projection = False
+        self.has_sort = False
+        self.has_where = False
+        if condition:
+            self._set_where(condition)
+
+    def _bind_single(self, obj):
+        """Bind single object.
+
+        Args:
+            obj (:class:`mysqlx.DbDoc` or str): DbDoc or JSON string object.
+
+        Raises:
+            :class:`mysqlx.ProgrammingError`: If invalid JSON string to bind.
+            ValueError: If JSON loaded is not a dictionary.
+        """
+        if isinstance(obj, dict):
+            self.bind(DbDoc(obj).as_str())
+        elif isinstance(obj, DbDoc):
+            self.bind(obj.as_str())
+        elif isinstance(obj, STRING_TYPES):
+            try:
+                res = json.loads(obj)
+                if not isinstance(res, dict):
+                    raise ValueError
+            except ValueError:
+                raise ProgrammingError("Invalid JSON string to bind")
+            for key in res.keys():
+                self.bind(key, res[key])
+        else:
+            raise ProgrammingError("Invalid JSON string or object to bind")
+
+    def _sort(self, *clauses):
+        """Sets the sorting criteria.
+
+        Args:
+            *clauses: The expression strings defining the sort criteria.
+
+        Returns:
+            mysqlx.FilterableStatement: FilterableStatement object.
+        """
+        self.has_sort = True
+        self._sort_str = ",".join(flexible_params(*clauses))
+        self._sort_expr = ExprParser(self._sort_str,
+                                     not self._doc_based).parse_order_spec()
+        self._changed = True
+        return self
+
+    def _set_where(self, condition):
+        """Sets the search condition to filter.
+
+        Args:
+            condition (str): Sets the search condition to filter documents or
+                             records.
+
+        Returns:
+            mysqlx.FilterableStatement: FilterableStatement object.
+        """
+        self.has_where = True
+        self._where_str = condition
+        try:
+            expr = ExprParser(condition, not self._doc_based)
+            self._where_expr = expr.expr()
+        except ValueError:
+            raise ProgrammingError("Invalid condition")
+        self._binding_map = expr.placeholder_name_to_position
+        self._changed = True
+        return self
+
+    def _set_group_by(self, *fields):
+        """Set group by.
+
+        Args:
+            *fields: List of fields.
+        """
+        fields = flexible_params(*fields)
+        self.has_group_by = True
+        self._grouping_str = ",".join(fields)
+        self._grouping = ExprParser(self._grouping_str,
+                                    not self._doc_based).parse_expr_list()
+        self._changed = True
+
+    def _set_having(self, condition):
+        """Set having.
+
+        Args:
+            condition (str): The condition.
+        """
+        self.has_having = True
+        self._having = ExprParser(condition, not self._doc_based).expr()
+        self._changed = True
+
+    def _set_projection(self, *fields):
+        """Set the projection.
+
+        Args:
+            *fields: List of fields.
+
+        Returns:
+            :class:`mysqlx.FilterableStatement`: Returns self.
+        """
+        fields = flexible_params(*fields)
+        self.has_projection = True
+        self._projection_str = ",".join(fields)
+        self._projection_expr = ExprParser(
+            self._projection_str,
+            not self._doc_based).parse_table_select_projection()
+        self._changed = True
+        return self
+
+    def get_binding_map(self):
+        """Returns the binding map dictionary.
+
+        Returns:
+            dict: The binding map dictionary.
+        """
+        return self._binding_map
+
+    def get_bindings(self):
+        """Returns the bindings list.
+
+        Returns:
+            `list`: The bindings list.
+        """
+        return self._bindings
+
+    def get_grouping(self):
+        """Returns the grouping expression list.
+
+        Returns:
+            `list`: The grouping expression list.
+        """
+        return self._grouping
+
+    def get_having(self):
+        """Returns the having expression.
+
+        Returns:
+            object: The having expression.
+        """
+        return self._having
+
+    def get_limit_row_count(self):
+        """Returns the limit row count.
+
+        Returns:
+            int: The limit row count.
+        """
+        return self._limit_row_count
+
+    def get_limit_offset(self):
+        """Returns the limit offset.
+
+        Returns:
+            int: The limit offset.
+        """
+        return self._limit_offset
+
+    def get_where_expr(self):
+        """Returns the where expression.
+
+        Returns:
+            object: The where expression.
+        """
+        return self._where_expr
+
+    def get_projection_expr(self):
+        """Returns the projection expression.
+
+        Returns:
+            object: The projection expression.
+        """
+        return self._projection_expr
+
+    def get_sort_expr(self):
+        """Returns the sort expression.
+
+        Returns:
+            object: The sort expression.
+        """
+        return self._sort_expr
+
+    @deprecated("8.0.12")
+    def where(self, condition):
+        """Sets the search condition to filter.
+
+        Args:
+            condition (str): Sets the search condition to filter documents or
+                             records.
+
+        Returns:
+            mysqlx.FilterableStatement: FilterableStatement object.
+
+        .. deprecated:: 8.0.12
+        """
+        return self._set_where(condition)
+
+    @deprecated("8.0.12")
+    def sort(self, *clauses):
+        """Sets the sorting criteria.
+
+        Args:
+            *clauses: The expression strings defining the sort criteria.
+
+        Returns:
+            mysqlx.FilterableStatement: FilterableStatement object.
+
+        .. deprecated:: 8.0.12
+        """
+        return self._sort(*clauses)
+
+    def limit(self, row_count, offset=None):
+        """Sets the maximum number of items to be returned.
+
+        Args:
+            row_count (int): The maximum number of items.
+
+        Returns:
+            mysqlx.FilterableStatement: FilterableStatement object.
+
+        Raises:
+            ValueError: If ``row_count`` is not a positive integer.
+
+        .. versionchanged:: 8.0.12
+           The usage of ``offset`` was deprecated.
+        """
+        if not isinstance(row_count, INT_TYPES) or row_count < 0:
+            raise ValueError("The 'row_count' value must be a positive integer")
+        if not self.has_limit:
+            self._changed = bool(self._exec_counter == 0)
+            self._deallocate_prepare_execute = bool(not self._exec_counter == 0)
+
+        self._limit_row_count = row_count
+        self.has_limit = True
+        if offset:
+            self.offset(offset)
+            warnings.warn("'limit(row_count, offset)' is deprecated, please "
+                          "use 'offset(offset)' to set the number of items to "
+                          "skip", category=DeprecationWarning)
+        return self
+
+    def offset(self, offset):
+        """Sets the number of items to skip.
+
+        Args:
+            offset (int): The number of items to skip.
+
+        Returns:
+            mysqlx.FilterableStatement: FilterableStatement object.
+
+        Raises:
+            ValueError: If ``offset`` is not a positive integer.
+
+        .. versionadded:: 8.0.12
+        """
+        if not isinstance(offset, INT_TYPES) or offset < 0:
+            raise ValueError("The 'offset' value must be a positive integer")
+        self._limit_offset = offset
+        return self
+
+    def bind(self, *args):
+        """Binds value(s) to a specific placeholder(s).
+
+        Args:
+            *args: The name of the placeholder and the value to bind.
+                   A :class:`mysqlx.DbDoc` object or a JSON string
+                   representation can be used.
+
+        Returns:
+            mysqlx.FilterableStatement: FilterableStatement object.
+
+        Raises:
+            ProgrammingError: If the number of arguments is invalid.
+        """
+        self.has_bindings = True
+        count = len(args)
+        if count == 1:
+            self._bind_single(args[0])
+        elif count == 2:
+            self._bindings[args[0]] = args[1]
+        else:
+            raise ProgrammingError("Invalid number of arguments to bind")
+        return self
+
+    def execute(self):
+        """Execute the statement.
+
+        Raises:
+           NotImplementedError: This method must be implemented.
+        """
+        raise NotImplementedError
+
+
+class SqlStatement(Statement):
+    """A statement for SQL execution.
+
+    Args:
+        connection (mysqlx.connection.Connection): Connection object.
+        sql (string): The sql statement to be executed.
+    """
+    def __init__(self, connection, sql):
+        super(SqlStatement, self).__init__(target=None, doc_based=False)
+        self._connection = connection
+        self._sql = sql
+        self._binding_map = None
+        self._bindings = []
+        self.has_bindings = False
+        self.has_limit = False
+
+    @property
+    def sql(self):
+        """string: The SQL text statement."""
+        return self._sql
+
+    def get_binding_map(self):
+        """Returns the binding map dictionary.
+
+        Returns:
+            dict: The binding map dictionary.
+        """
+        return self._binding_map
+
+    def get_bindings(self):
+        """Returns the bindings list.
+
+        Returns:
+            `list`: The bindings list.
+        """
+        return self._bindings
+
+    def bind(self, *args):
+        """Binds value(s) to a specific placeholder(s).
+
+        Args:
+            *args: The value(s) to bind.
+
+        Returns:
+            mysqlx.SqlStatement: SqlStatement object.
+        """
+        if len(args) == 0:
+            raise ProgrammingError("Invalid number of arguments to bind")
+        self.has_bindings = True
+        bindings = flexible_params(*args)
+        if isinstance(bindings, (list, tuple)):
+            self._bindings = bindings
+        else:
+            self._bindings.append(bindings)
+        return self
+
+    def execute(self):
+        """Execute the statement.
+
+        Returns:
+            mysqlx.SqlResult: SqlResult object.
+        """
+        return self._connection.send_sql(self)
+
+
+class WriteStatement(Statement):
+    """Provide common write operation attributes.
+    """
+    def __init__(self, target, doc_based):
+        super(WriteStatement, self).__init__(target, doc_based)
+        self._values = []
+
+    def get_values(self):
+        """Returns the list of values.
+
+        Returns:
+            `list`: The list of values.
+        """
+        return self._values
+
+    def execute(self):
+        """Execute the statement.
+
+        Raises:
+           NotImplementedError: This method must be implemented.
+        """
+        raise NotImplementedError
+
+
+class AddStatement(WriteStatement):
+    """A statement for document addition on a collection.
+
+    Args:
+        collection (mysqlx.Collection): The Collection object.
+    """
+    def __init__(self, collection):
+        super(AddStatement, self).__init__(collection, True)
+        self._upsert = False
+        self.ids = []
+
+    def is_upsert(self):
+        """Returns `True` if it's an upsert.
+
+        Returns:
+            bool: `True` if it's an upsert.
+        """
+        return self._upsert
+
+    def upsert(self, value=True):
+        """Sets the upset flag to the boolean of the value provided.
+        Setting of this flag allows updating of the matched rows/documents
+        with the provided value.
+
+        Args:
+            value (optional[bool]): Set or unset the upsert flag.
+        """
+        self._upsert = value
+        return self
+
+    def add(self, *values):
+        """Adds a list of documents into a collection.
+
+        Args:
+            *values: The documents to be added into the collection.
+
+        Returns:
+            mysqlx.AddStatement: AddStatement object.
+        """
+        for val in flexible_params(*values):
+            if isinstance(val, DbDoc):
+                self._values.append(val)
+            else:
+                self._values.append(DbDoc(val))
+        return self
+
+    def execute(self):
+        """Execute the statement.
+
+        Returns:
+            mysqlx.Result: Result object.
+        """
+        if len(self._values) == 0:
+            return Result()
+
+        return self._connection.send_insert(self)
+
+
+class UpdateSpec(object):
+    """Update specification class implementation.
+
+    Args:
+        update_type (int): The update type.
+        source (str): The source.
+        value (Optional[str]): The value.
+    """
+    def __init__(self, update_type, source, value=None):
+        if update_type == mysqlxpb_enum(
+                "Mysqlx.Crud.UpdateOperation.UpdateType.SET"):
+            self._table_set(source, value)
+        else:
+            self.update_type = update_type
+            self.source = source
+            if len(source) > 0 and source[0] == '$':
+                self.source = source[1:]
+            self.source = ExprParser(self.source,
+                                     False).document_field().identifier
+            self.value = value
+
+    def _table_set(self, source, value):
+        """Table set.
+
+        Args:
+            source (str): The source.
+            value (str): The value.
+        """
+        self.update_type = mysqlxpb_enum(
+            "Mysqlx.Crud.UpdateOperation.UpdateType.SET")
+        self.source = ExprParser(source, True).parse_table_update_field()
+        self.value = value
+
+
+class ModifyStatement(FilterableStatement):
+    """A statement for document update operations on a Collection.
+
+    Args:
+        collection (mysqlx.Collection): The Collection object.
+        condition (str): Sets the search condition to identify the documents
+                         to be modified.
+
+    .. versionchanged:: 8.0.12
+       The ``condition`` parameter is now mandatory.
+    """
+    def __init__(self, collection, condition):
+        super(ModifyStatement, self).__init__(target=collection,
+                                              condition=condition)
+        self._update_ops = {}
+
+    def sort(self, *clauses):
+        """Sets the sorting criteria.
+
+        Args:
+            *clauses: The expression strings defining the sort criteria.
+
+        Returns:
+            mysqlx.ModifyStatement: ModifyStatement object.
+        """
+        return self._sort(*clauses)
+
+    def get_update_ops(self):
+        """Returns the list of update operations.
+
+        Returns:
+            `list`: The list of update operations.
+        """
+        return self._update_ops
+
+    def set(self, doc_path, value):
+        """Sets or updates attributes on documents in a collection.
+
+        Args:
+            doc_path (string): The document path of the item to be set.
+            value (string): The value to be set on the specified attribute.
+
+        Returns:
+            mysqlx.ModifyStatement: ModifyStatement object.
+        """
+        self._update_ops[doc_path] = UpdateSpec(mysqlxpb_enum(
+            "Mysqlx.Crud.UpdateOperation.UpdateType.ITEM_SET"),
+                                                doc_path, value)
+        self._changed = True
+        return self
+
+    @deprecated("8.0.12")
+    def change(self, doc_path, value):
+        """Add an update to the statement setting the field, if it exists at
+        the document path, to the given value.
+
+        Args:
+            doc_path (string): The document path of the item to be set.
+            value (object): The value to be set on the specified attribute.
+
+        Returns:
+            mysqlx.ModifyStatement: ModifyStatement object.
+
+        .. deprecated:: 8.0.12
+        """
+        self._update_ops[doc_path] = UpdateSpec(mysqlxpb_enum(
+            "Mysqlx.Crud.UpdateOperation.UpdateType.ITEM_REPLACE"),
+                                                doc_path, value)
+        self._changed = True
+        return self
+
+    def unset(self, *doc_paths):
+        """Removes attributes from documents in a collection.
+
+        Args:
+            doc_paths (list): The list of document paths of the attributes to be
+                              removed.
+
+        Returns:
+            mysqlx.ModifyStatement: ModifyStatement object.
+        """
+        for item in flexible_params(*doc_paths):
+            self._update_ops[item] = UpdateSpec(mysqlxpb_enum(
+                "Mysqlx.Crud.UpdateOperation.UpdateType.ITEM_REMOVE"), item)
+        self._changed = True
+        return self
+
+    def array_insert(self, field, value):
+        """Insert a value into the specified array in documents of a
+        collection.
+
+        Args:
+            field (string): A document path that identifies the array attribute
+                            and position where the value will be inserted.
+            value (object): The value to be inserted.
+
+        Returns:
+            mysqlx.ModifyStatement: ModifyStatement object.
+        """
+        self._update_ops[field] = UpdateSpec(mysqlxpb_enum(
+            "Mysqlx.Crud.UpdateOperation.UpdateType.ARRAY_INSERT"),
+                                             field, value)
+        self._changed = True
+        return self
+
+    def array_append(self, doc_path, value):
+        """Inserts a value into a specific position in an array attribute in
+        documents of a collection.
+
+        Args:
+            doc_path (string): A document path that identifies the array
+                               attribute and position where the value will be
+                               inserted.
+            value (object): The value to be inserted.
+
+        Returns:
+            mysqlx.ModifyStatement: ModifyStatement object.
+        """
+        self._update_ops[doc_path] = UpdateSpec(mysqlxpb_enum(
+            "Mysqlx.Crud.UpdateOperation.UpdateType.ARRAY_APPEND"),
+                                                doc_path, value)
+        self._changed = True
+        return self
+
+    def patch(self, doc):
+        """Takes a :class:`mysqlx.DbDoc`, string JSON format or a dict with the
+        changes and applies it on all matching documents.
+
+        Args:
+            doc (object): A generic document (DbDoc), string in JSON format or
+                          dict, with the changes to apply to the matching
+                          documents.
+
+        Returns:
+            mysqlx.ModifyStatement: ModifyStatement object.
+        """
+        if doc is None:
+            doc = ''
+        if not isinstance(doc, (ExprParser, dict, DbDoc, str)):
+            raise ProgrammingError(
+                "Invalid data for update operation on document collection "
+                "table")
+        self._update_ops["patch"] = UpdateSpec(
+            mysqlxpb_enum("Mysqlx.Crud.UpdateOperation.UpdateType.MERGE_PATCH"),
+            '', doc.expr() if isinstance(doc, ExprParser) else doc)
+        self._changed = True
+        return self
+
+    def execute(self):
+        """Execute the statement.
+
+        Returns:
+            mysqlx.Result: Result object.
+
+        Raises:
+            ProgrammingError: If condition was not set.
+        """
+        if not self.has_where:
+            raise ProgrammingError("No condition was found for modify")
+        return self._connection.send_update(self)
+
+
+class ReadStatement(FilterableStatement):
+    """Provide base functionality for Read operations
+
+    Args:
+        target (object): The target database object, it can be
+                         :class:`mysqlx.Collection` or :class:`mysqlx.Table`.
+        doc_based (Optional[bool]): `True` if it is document based
+                                    (default: `True`).
+        condition (Optional[str]): Sets the search condition to filter
+                                   documents or records.
+    """
+    def __init__(self, target, doc_based=True, condition=None):
+        super(ReadStatement, self).__init__(target, doc_based, condition)
+        self._lock_exclusive = False
+        self._lock_shared = False
+        self._lock_contention = LockContention.DEFAULT
+
+    @property
+    def lock_contention(self):
+        """:class:`mysqlx.LockContention`: The lock contention value."""
+        return self._lock_contention
+
+    def _set_lock_contention(self, lock_contention):
+        """Set the lock contention.
+
+        Args:
+            lock_contention (:class:`mysqlx.LockContention`): Lock contention.
+
+        Raises:
+            ProgrammingError: If is an invalid lock contention value.
+        """
+        try:
+            # Check if is a valid lock contention value
+            _ = LockContention.index(lock_contention)
+        except ValueError:
+            raise ProgrammingError("Invalid lock contention mode. Use 'NOWAIT' "
+                                   "or 'SKIP_LOCKED'")
+        self._lock_contention = lock_contention
+
+    def is_lock_exclusive(self):
+        """Returns `True` if is `EXCLUSIVE LOCK`.
+
+        Returns:
+            bool: `True` if is `EXCLUSIVE LOCK`.
+        """
+        return self._lock_exclusive
+
+    def is_lock_shared(self):
+        """Returns `True` if is `SHARED LOCK`.
+
+        Returns:
+            bool: `True` if is `SHARED LOCK`.
+        """
+        return self._lock_shared
+
+    def lock_shared(self, lock_contention=LockContention.DEFAULT):
+        """Execute a read operation with `SHARED LOCK`. Only one lock can be
+           active at a time.
+
+        Args:
+            lock_contention (:class:`mysqlx.LockContention`): Lock contention.
+        """
+        self._lock_exclusive = False
+        self._lock_shared = True
+        self._set_lock_contention(lock_contention)
+        return self
+
+    def lock_exclusive(self, lock_contention=LockContention.DEFAULT):
+        """Execute a read operation with `EXCLUSIVE LOCK`. Only one lock can be
+           active at a time.
+
+        Args:
+            lock_contention (:class:`mysqlx.LockContention`): Lock contention.
+        """
+        self._lock_exclusive = True
+        self._lock_shared = False
+        self._set_lock_contention(lock_contention)
+        return self
+
+    def group_by(self, *fields):
+        """Sets a grouping criteria for the resultset.
+
+        Args:
+            *fields: The string expressions identifying the grouping criteria.
+
+        Returns:
+            mysqlx.ReadStatement: ReadStatement object.
+        """
+        self._set_group_by(*fields)
+        return self
+
+    def having(self, condition):
+        """Sets a condition for records to be considered in agregate function
+        operations.
+
+        Args:
+            condition (string): A condition on the agregate functions used on
+                                the grouping criteria.
+
+        Returns:
+            mysqlx.ReadStatement: ReadStatement object.
+        """
+        self._set_having(condition)
+        return self
+
+    def execute(self):
+        """Execute the statement.
+
+        Returns:
+            mysqlx.Result: Result object.
+        """
+        return self._connection.send_find(self)
+
+
+class FindStatement(ReadStatement):
+    """A statement document selection on a Collection.
+
+    Args:
+        collection (mysqlx.Collection): The Collection object.
+        condition (Optional[str]): An optional expression to identify the
+                                   documents to be retrieved. If not specified
+                                   all the documents will be included on the
+                                   result unless a limit is set.
+    """
+    def __init__(self, collection, condition=None):
+        super(FindStatement, self).__init__(collection, True, condition)
+
+    def fields(self, *fields):
+        """Sets a document field filter.
+
+        Args:
+            *fields: The string expressions identifying the fields to be
+                     extracted.
+
+        Returns:
+            mysqlx.FindStatement: FindStatement object.
+        """
+        return self._set_projection(*fields)
+
+    def sort(self, *clauses):
+        """Sets the sorting criteria.
+
+        Args:
+            *clauses: The expression strings defining the sort criteria.
+
+        Returns:
+            mysqlx.FindStatement: FindStatement object.
+        """
+        return self._sort(*clauses)
+
+
+class SelectStatement(ReadStatement):
+    """A statement for record retrieval operations on a Table.
+
+    Args:
+        table (mysqlx.Table): The Table object.
+        *fields: The fields to be retrieved.
+    """
+    def __init__(self, table, *fields):
+        super(SelectStatement, self).__init__(table, False)
+        self._set_projection(*fields)
+
+    def where(self, condition):
+        """Sets the search condition to filter.
+
+        Args:
+            condition (str): Sets the search condition to filter records.
+
+        Returns:
+            mysqlx.SelectStatement: SelectStatement object.
+        """
+        return self._set_where(condition)
+
+    def order_by(self, *clauses):
+        """Sets the order by criteria.
+
+        Args:
+            *clauses: The expression strings defining the order by criteria.
+
+        Returns:
+            mysqlx.SelectStatement: SelectStatement object.
+        """
+        return self._sort(*clauses)
+
+    def get_sql(self):
+        """Returns the generated SQL.
+
+        Returns:
+            str: The generated SQL.
+        """
+        where = " WHERE {0}".format(self._where_str) if self.has_where else ""
+        group_by = " GROUP BY {0}".format(self._grouping_str) if \
+            self.has_group_by else ""
+        having = " HAVING {0}".format(self._having) if self.has_having else ""
+        order_by = " ORDER BY {0}".format(self._sort_str) if self.has_sort \
+            else ""
+        limit = " LIMIT {0} OFFSET {1}".format(self._limit_row_count,
+                                               self._limit_offset) \
+                                               if self.has_limit else ""
+        stmt = ("SELECT {select} FROM {schema}.{table}{where}{group}{having}"
+                "{order}{limit}".format(select=self._projection_str or "*",
+                                        schema=self.schema.name,
+                                        table=self.target.name, limit=limit,
+                                        where=where, group=group_by,
+                                        having=having, order=order_by))
+        return stmt
+
+
+class InsertStatement(WriteStatement):
+    """A statement for insert operations on Table.
+
+    Args:
+        table (mysqlx.Table): The Table object.
+        *fields: The fields to be inserted.
+    """
+    def __init__(self, table, *fields):
+        super(InsertStatement, self).__init__(table, False)
+        self._fields = flexible_params(*fields)
+
+    def values(self, *values):
+        """Set the values to be inserted.
+
+        Args:
+            *values: The values of the columns to be inserted.
+
+        Returns:
+            mysqlx.InsertStatement: InsertStatement object.
+        """
+        self._values.append(list(flexible_params(*values)))
+        return self
+
+    def execute(self):
+        """Execute the statement.
+
+        Returns:
+            mysqlx.Result: Result object.
+        """
+        return self._connection.send_insert(self)
+
+
+class UpdateStatement(FilterableStatement):
+    """A statement for record update operations on a Table.
+
+    Args:
+        table (mysqlx.Table): The Table object.
+
+    .. versionchanged:: 8.0.12
+       The ``fields`` parameters were removed.
+    """
+    def __init__(self, table):
+        super(UpdateStatement, self).__init__(target=table, doc_based=False)
+        self._update_ops = {}
+
+    def where(self, condition):
+        """Sets the search condition to filter.
+
+        Args:
+            condition (str): Sets the search condition to filter records.
+
+        Returns:
+            mysqlx.UpdateStatement: UpdateStatement object.
+        """
+        return self._set_where(condition)
+
+    def order_by(self, *clauses):
+        """Sets the order by criteria.
+
+        Args:
+            *clauses: The expression strings defining the order by criteria.
+
+        Returns:
+            mysqlx.UpdateStatement: UpdateStatement object.
+        """
+        return self._sort(*clauses)
+
+    def get_update_ops(self):
+        """Returns the list of update operations.
+
+        Returns:
+            `list`: The list of update operations.
+        """
+        return self._update_ops
+
+    def set(self, field, value):
+        """Updates the column value on records in a table.
+
+        Args:
+            field (string): The column name to be updated.
+            value (object): The value to be set on the specified column.
+
+        Returns:
+            mysqlx.UpdateStatement: UpdateStatement object.
+        """
+        self._update_ops[field] = UpdateSpec(mysqlxpb_enum(
+            "Mysqlx.Crud.UpdateOperation.UpdateType.SET"), field, value)
+        self._changed = True
+        return self
+
+    def execute(self):
+        """Execute the statement.
+
+        Returns:
+            mysqlx.Result: Result object
+
+        Raises:
+            ProgrammingError: If condition was not set.
+        """
+        if not self.has_where:
+            raise ProgrammingError("No condition was found for update")
+        return self._connection.send_update(self)
+
+
+class RemoveStatement(FilterableStatement):
+    """A statement for document removal from a collection.
+
+    Args:
+        collection (mysqlx.Collection): The Collection object.
+        condition (str): Sets the search condition to identify the documents
+                         to be removed.
+
+    .. versionchanged:: 8.0.12
+       The ``condition`` parameter was added.
+    """
+    def __init__(self, collection, condition):
+        super(RemoveStatement, self).__init__(target=collection,
+                                              condition=condition)
+
+    def sort(self, *clauses):
+        """Sets the sorting criteria.
+
+        Args:
+            *clauses: The expression strings defining the sort criteria.
+
+        Returns:
+            mysqlx.FindStatement: FindStatement object.
+        """
+        return self._sort(*clauses)
+
+    def execute(self):
+        """Execute the statement.
+
+        Returns:
+            mysqlx.Result: Result object.
+
+        Raises:
+            ProgrammingError: If condition was not set.
+        """
+        if not self.has_where:
+            raise ProgrammingError("No condition was found for remove")
+        return self._connection.send_delete(self)
+
+
+class DeleteStatement(FilterableStatement):
+    """A statement that drops a table.
+
+    Args:
+        table (mysqlx.Table): The Table object.
+
+    .. versionchanged:: 8.0.12
+       The ``condition`` parameter was removed.
+    """
+    def __init__(self, table):
+        super(DeleteStatement, self).__init__(target=table, doc_based=False)
+
+    def where(self, condition):
+        """Sets the search condition to filter.
+
+        Args:
+            condition (str): Sets the search condition to filter records.
+
+        Returns:
+            mysqlx.DeleteStatement: DeleteStatement object.
+        """
+        return self._set_where(condition)
+
+    def order_by(self, *clauses):
+        """Sets the order by criteria.
+
+        Args:
+            *clauses: The expression strings defining the order by criteria.
+
+        Returns:
+            mysqlx.DeleteStatement: DeleteStatement object.
+        """
+        return self._sort(*clauses)
+
+    def execute(self):
+        """Execute the statement.
+
+        Returns:
+            mysqlx.Result: Result object.
+
+        Raises:
+            ProgrammingError: If condition was not set.
+        """
+        if not self.has_where:
+            raise ProgrammingError("No condition was found for delete")
+        return self._connection.send_delete(self)
+
+
+class CreateCollectionIndexStatement(Statement):
+    """A statement that creates an index on a collection.
+
+    Args:
+        collection (mysqlx.Collection): Collection.
+        index_name (string): Index name.
+        index_desc (dict): A dictionary containing the fields members that
+                           constraints the index to be created. It must have
+                           the form as shown in the following::
+
+                               {"fields": [{"field": member_path,
+                                            "type": member_type,
+                                            "required": member_required,
+                                            "collation": collation,
+                                            "options": options,
+                                            "srid": srid},
+                                            # {... more members,
+                                            #      repeated as many times
+                                            #      as needed}
+                                            ],
+                                "type": type}
+    """
+    def __init__(self, collection, index_name, index_desc):
+        super(CreateCollectionIndexStatement, self).__init__(target=collection)
+        self._index_desc = copy.deepcopy(index_desc)
+        self._index_name = index_name
+        self._fields_desc = self._index_desc.pop("fields", [])
+
+    def execute(self):
+        """Execute the statement.
+
+        Returns:
+            mysqlx.Result: Result object.
+        """
+        # Validate index name is a valid identifier
+        if self._index_name is None:
+            raise ProgrammingError(
+                ERR_INVALID_INDEX_NAME.format(self._index_name))
+        try:
+            parsed_ident = ExprParser(self._index_name).expr().get_message()
+
+            # The message is type dict when the Protobuf cext is used
+            if isinstance(parsed_ident, dict):
+                if parsed_ident["type"] != mysqlxpb_enum(
+                        "Mysqlx.Expr.Expr.Type.IDENT"):
+                    raise ProgrammingError(
+                        ERR_INVALID_INDEX_NAME.format(self._index_name))
+            else:
+                if parsed_ident.type != mysqlxpb_enum(
+                        "Mysqlx.Expr.Expr.Type.IDENT"):
+                    raise ProgrammingError(
+                        ERR_INVALID_INDEX_NAME.format(self._index_name))
+
+        except (ValueError, AttributeError):
+            raise ProgrammingError(
+                ERR_INVALID_INDEX_NAME.format(self._index_name))
+
+        # Validate members that constraint the index
+        if not self._fields_desc:
+            raise ProgrammingError("Required member 'fields' not found in "
+                                   "the given index description: {}"
+                                   "".format(self._index_desc))
+
+        if not isinstance(self._fields_desc, list):
+            raise ProgrammingError("Required member 'fields' must contain a "
+                                   "list.")
+
+        args = {}
+        args["name"] = self._index_name
+        args["collection"] = self._target.name
+        args["schema"] = self._target.schema.name
+        if "type" in self._index_desc:
+            args["type"] = self._index_desc.pop("type")
+        else:
+            args["type"] = "INDEX"
+        args["unique"] = self._index_desc.pop("unique", False)
+        # Currently unique indexes are not supported:
+        if args["unique"]:
+            raise NotSupportedError("Unique indexes are not supported.")
+        args["constraint"] = []
+
+        if self._index_desc:
+            raise ProgrammingError("Unidentified fields: {}"
+                                   "".format(self._index_desc))
+
+        try:
+            for field_desc in self._fields_desc:
+                constraint = {}
+                constraint["member"] = field_desc.pop("field")
+                constraint["type"] = field_desc.pop("type")
+                constraint["required"] = field_desc.pop("required", False)
+                constraint["array"] = field_desc.pop("array", False)
+                if not isinstance(constraint["required"], bool):
+                    raise TypeError("Field member 'required' must be Boolean")
+                if not isinstance(constraint["array"], bool):
+                    raise TypeError("Field member 'array' must be Boolean")
+                if args["type"].upper() == "SPATIAL" and \
+                   not constraint["required"]:
+                    raise ProgrammingError(
+                        "Field member 'required' must be set to 'True' when "
+                        "index type is set to 'SPATIAL'")
+                if args["type"].upper() == "INDEX" and \
+                   constraint["type"] == "GEOJSON":
+                    raise ProgrammingError(
+                        "Index 'type' must be set to 'SPATIAL' when field "
+                        "type is set to 'GEOJSON'")
+                if "collation" in field_desc:
+                    if not constraint["type"].upper().startswith("TEXT"):
+                        raise ProgrammingError(
+                            "The 'collation' member can only be used when "
+                            "field type is set to '{}'"
+                            "".format(constraint["type"].upper()))
+                    constraint["collation"] = field_desc.pop("collation")
+                # "options" and "srid" fields in IndexField can be
+                # present only if "type" is set to "GEOJSON"
+                if "options" in field_desc:
+                    if constraint["type"].upper() != "GEOJSON":
+                        raise ProgrammingError(
+                            "The 'options' member can only be used when "
+                            "index type is set to 'GEOJSON'")
+                    constraint["options"] = field_desc.pop("options")
+                if "srid" in field_desc:
+                    if constraint["type"].upper() != "GEOJSON":
+                        raise ProgrammingError(
+                            "The 'srid' member can only be used when index "
+                            "type is set to 'GEOJSON'")
+                    constraint["srid"] = field_desc.pop("srid")
+                args["constraint"].append(constraint)
+        except KeyError as err:
+            raise ProgrammingError("Required inner member {} not found in "
+                                   "constraint: {}".format(err, field_desc))
+
+        for field_desc in self._fields_desc:
+            if field_desc:
+                raise ProgrammingError("Unidentified inner fields:{}"
+                                       "".format(field_desc))
+
+        return self._connection.execute_nonquery(
+            "mysqlx", "create_collection_index", True, args)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/LICENSE.txt b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/LICENSE.txt
new file mode 100644
index 0000000..737fec5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/LICENSE.txt
@@ -0,0 +1,20 @@
+Copyright (c) 2008-2019 The pip developers (see AUTHORS.txt file)
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/METADATA
new file mode 100644
index 0000000..b496f2b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/METADATA
@@ -0,0 +1,88 @@
+Metadata-Version: 2.1
+Name: pip
+Version: 20.2.4
+Summary: The PyPA recommended tool for installing Python packages.
+Home-page: https://pip.pypa.io/
+Author: The pip developers
+Author-email: distutils-sig@python.org
+License: MIT
+Project-URL: Documentation, https://pip.pypa.io
+Project-URL: Source, https://github.com/pypa/pip
+Project-URL: Changelog, https://pip.pypa.io/en/stable/news/
+Keywords: distutils easy_install egg setuptools wheel virtualenv
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Topic :: Software Development :: Build Tools
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Requires-Python: >=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*
+
+pip - The Python Package Installer
+==================================
+
+.. image:: https://img.shields.io/pypi/v/pip.svg
+   :target: https://pypi.org/project/pip/
+
+.. image:: https://readthedocs.org/projects/pip/badge/?version=latest
+   :target: https://pip.pypa.io/en/latest
+
+pip is the `package installer`_ for Python. You can use pip to install packages from the `Python Package Index`_ and other indexes.
+
+Please take a look at our documentation for how to install and use pip:
+
+* `Installation`_
+* `Usage`_
+
+We release updates regularly, with a new version every 3 months. Find more details in our documentation:
+
+* `Release notes`_
+* `Release process`_
+
+In 2020, we're working on improvements to the heart of pip. Please `learn more and take our survey`_ to help us do it right.
+
+If you find bugs, need help, or want to talk to the developers, please use our mailing lists or chat rooms:
+
+* `Issue tracking`_
+* `Discourse channel`_
+* `User IRC`_
+
+If you want to get involved head over to GitHub to get the source code, look at our development documentation and feel free to jump on the developer mailing lists and chat rooms:
+
+* `GitHub page`_
+* `Development documentation`_
+* `Development mailing list`_
+* `Development IRC`_
+
+Code of Conduct
+---------------
+
+Everyone interacting in the pip project's codebases, issue trackers, chat
+rooms, and mailing lists is expected to follow the `PyPA Code of Conduct`_.
+
+.. _package installer: https://packaging.python.org/guides/tool-recommendations/
+.. _Python Package Index: https://pypi.org
+.. _Installation: https://pip.pypa.io/en/stable/installing.html
+.. _Usage: https://pip.pypa.io/en/stable/
+.. _Release notes: https://pip.pypa.io/en/stable/news.html
+.. _Release process: https://pip.pypa.io/en/latest/development/release-process/
+.. _GitHub page: https://github.com/pypa/pip
+.. _Development documentation: https://pip.pypa.io/en/latest/development
+.. _learn more and take our survey: https://pyfound.blogspot.com/2020/03/new-pip-resolver-to-roll-out-this-year.html
+.. _Issue tracking: https://github.com/pypa/pip/issues
+.. _Discourse channel: https://discuss.python.org/c/packaging
+.. _Development mailing list: https://mail.python.org/mailman3/lists/distutils-sig.python.org/
+.. _User IRC: https://webchat.freenode.net/?channels=%23pypa
+.. _Development IRC: https://webchat.freenode.net/?channels=%23pypa-dev
+.. _PyPA Code of Conduct: https://www.pypa.io/en/latest/code-of-conduct/
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/RECORD
new file mode 100644
index 0000000..f62354e
--- /dev/null
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/WHEEL
new file mode 100644
index 0000000..6d38aa0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.35.1)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/entry_points.txt b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/entry_points.txt
new file mode 100644
index 0000000..d48bd8a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/entry_points.txt
@@ -0,0 +1,5 @@
+[console_scripts]
+pip = pip._internal.cli.main:main
+pip3 = pip._internal.cli.main:main
+pip3.8 = pip._internal.cli.main:main
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/top_level.txt
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip-20.2.4.dist-info/top_level.txt
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/__init__.py
new file mode 100644
index 0000000..b2e0514
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/__init__.py
@@ -0,0 +1,18 @@
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional
+
+
+__version__ = "20.2.4"
+
+
+def main(args=None):
+    # type: (Optional[List[str]]) -> int
+    """This is an internal API only meant for use by pip's own console scripts.
+
+    For additional details, see https://github.com/pypa/pip/issues/7498.
+    """
+    from pip._internal.utils.entrypoints import _wrapper
+
+    return _wrapper(args)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/__main__.py b/python3-vckonline/lib/python3.8/site-packages/pip/__main__.py
new file mode 100644
index 0000000..7c2505f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/__main__.py
@@ -0,0 +1,26 @@
+from __future__ import absolute_import
+
+import os
+import sys
+
+# Remove '' and current working directory from the first entry
+# of sys.path, if present to avoid using current directory
+# in pip commands check, freeze, install, list and show,
+# when invoked as python -m pip <command>
+if sys.path[0] in ('', os.getcwd()):
+    sys.path.pop(0)
+
+# If we are running from a wheel, add the wheel to sys.path
+# This allows the usage python pip-*.whl/pip install pip-*.whl
+if __package__ == '':
+    # __file__ is pip-*.whl/pip/__main__.py
+    # first dirname call strips of '/__main__.py', second strips off '/pip'
+    # Resulting path is the name of the wheel itself
+    # Add that to sys.path so we can import pip
+    path = os.path.dirname(os.path.dirname(__file__))
+    sys.path.insert(0, path)
+
+from pip._internal.cli.main import main as _main  # isort:skip # noqa
+
+if __name__ == '__main__':
+    sys.exit(_main())
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..c8b4445
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/pip/__pycache__/__init__.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/__pycache__/__main__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/__pycache__/__main__.cpython-38.pyc
new file mode 100644
index 0000000..7ebc042
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/pip/__pycache__/__main__.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__init__.py
new file mode 100644
index 0000000..264c2ca
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__init__.py
@@ -0,0 +1,17 @@
+import pip._internal.utils.inject_securetransport  # noqa
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, List
+
+
+def main(args=None):
+    # type: (Optional[List[str]]) -> int
+    """This is preserved for old console scripts that may still be referencing
+    it.
+
+    For additional details, see https://github.com/pypa/pip/issues/7498.
+    """
+    from pip._internal.utils.entrypoints import _wrapper
+
+    return _wrapper(args)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/build_env.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/build_env.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/cache.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/cache.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/configuration.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/configuration.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/locations.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/locations.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/main.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/main.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/pyproject.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/pyproject.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/self_outdated_check.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/self_outdated_check.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/wheel_builder.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/__pycache__/wheel_builder.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/build_env.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/build_env.py
new file mode 100644
index 0000000..28d1ad6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/build_env.py
@@ -0,0 +1,241 @@
+"""Build Environment used for isolation during sdist building
+"""
+
+import logging
+import os
+import sys
+import textwrap
+from collections import OrderedDict
+from distutils.sysconfig import get_python_lib
+from sysconfig import get_paths
+
+from pip._vendor.pkg_resources import Requirement, VersionConflict, WorkingSet
+
+from pip import __file__ as pip_location
+from pip._internal.cli.spinners import open_spinner
+from pip._internal.utils.subprocess import call_subprocess
+from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from types import TracebackType
+    from typing import Tuple, Set, Iterable, Optional, List, Type
+    from pip._internal.index.package_finder import PackageFinder
+
+logger = logging.getLogger(__name__)
+
+
+class _Prefix:
+
+    def __init__(self, path):
+        # type: (str) -> None
+        self.path = path
+        self.setup = False
+        self.bin_dir = get_paths(
+            'nt' if os.name == 'nt' else 'posix_prefix',
+            vars={'base': path, 'platbase': path}
+        )['scripts']
+        # Note: prefer distutils' sysconfig to get the
+        # library paths so PyPy is correctly supported.
+        purelib = get_python_lib(plat_specific=False, prefix=path)
+        platlib = get_python_lib(plat_specific=True, prefix=path)
+        if purelib == platlib:
+            self.lib_dirs = [purelib]
+        else:
+            self.lib_dirs = [purelib, platlib]
+
+
+class BuildEnvironment(object):
+    """Creates and manages an isolated environment to install build deps
+    """
+
+    def __init__(self):
+        # type: () -> None
+        temp_dir = TempDirectory(
+            kind=tempdir_kinds.BUILD_ENV, globally_managed=True
+        )
+
+        self._prefixes = OrderedDict((
+            (name, _Prefix(os.path.join(temp_dir.path, name)))
+            for name in ('normal', 'overlay')
+        ))
+
+        self._bin_dirs = []  # type: List[str]
+        self._lib_dirs = []  # type: List[str]
+        for prefix in reversed(list(self._prefixes.values())):
+            self._bin_dirs.append(prefix.bin_dir)
+            self._lib_dirs.extend(prefix.lib_dirs)
+
+        # Customize site to:
+        # - ensure .pth files are honored
+        # - prevent access to system site packages
+        system_sites = {
+            os.path.normcase(site) for site in (
+                get_python_lib(plat_specific=False),
+                get_python_lib(plat_specific=True),
+            )
+        }
+        self._site_dir = os.path.join(temp_dir.path, 'site')
+        if not os.path.exists(self._site_dir):
+            os.mkdir(self._site_dir)
+        with open(os.path.join(self._site_dir, 'sitecustomize.py'), 'w') as fp:
+            fp.write(textwrap.dedent(
+                '''
+                import os, site, sys
+
+                # First, drop system-sites related paths.
+                original_sys_path = sys.path[:]
+                known_paths = set()
+                for path in {system_sites!r}:
+                    site.addsitedir(path, known_paths=known_paths)
+                system_paths = set(
+                    os.path.normcase(path)
+                    for path in sys.path[len(original_sys_path):]
+                )
+                original_sys_path = [
+                    path for path in original_sys_path
+                    if os.path.normcase(path) not in system_paths
+                ]
+                sys.path = original_sys_path
+
+                # Second, add lib directories.
+                # ensuring .pth file are processed.
+                for path in {lib_dirs!r}:
+                    assert not path in sys.path
+                    site.addsitedir(path)
+                '''
+            ).format(system_sites=system_sites, lib_dirs=self._lib_dirs))
+
+    def __enter__(self):
+        # type: () -> None
+        self._save_env = {
+            name: os.environ.get(name, None)
+            for name in ('PATH', 'PYTHONNOUSERSITE', 'PYTHONPATH')
+        }
+
+        path = self._bin_dirs[:]
+        old_path = self._save_env['PATH']
+        if old_path:
+            path.extend(old_path.split(os.pathsep))
+
+        pythonpath = [self._site_dir]
+
+        os.environ.update({
+            'PATH': os.pathsep.join(path),
+            'PYTHONNOUSERSITE': '1',
+            'PYTHONPATH': os.pathsep.join(pythonpath),
+        })
+
+    def __exit__(
+        self,
+        exc_type,  # type: Optional[Type[BaseException]]
+        exc_val,  # type: Optional[BaseException]
+        exc_tb  # type: Optional[TracebackType]
+    ):
+        # type: (...) -> None
+        for varname, old_value in self._save_env.items():
+            if old_value is None:
+                os.environ.pop(varname, None)
+            else:
+                os.environ[varname] = old_value
+
+    def check_requirements(self, reqs):
+        # type: (Iterable[str]) -> Tuple[Set[Tuple[str, str]], Set[str]]
+        """Return 2 sets:
+            - conflicting requirements: set of (installed, wanted) reqs tuples
+            - missing requirements: set of reqs
+        """
+        missing = set()
+        conflicting = set()
+        if reqs:
+            ws = WorkingSet(self._lib_dirs)
+            for req in reqs:
+                try:
+                    if ws.find(Requirement.parse(req)) is None:
+                        missing.add(req)
+                except VersionConflict as e:
+                    conflicting.add((str(e.args[0].as_requirement()),
+                                     str(e.args[1])))
+        return conflicting, missing
+
+    def install_requirements(
+        self,
+        finder,  # type: PackageFinder
+        requirements,  # type: Iterable[str]
+        prefix_as_string,  # type: str
+        message  # type: str
+    ):
+        # type: (...) -> None
+        prefix = self._prefixes[prefix_as_string]
+        assert not prefix.setup
+        prefix.setup = True
+        if not requirements:
+            return
+        args = [
+            sys.executable, os.path.dirname(pip_location), 'install',
+            '--ignore-installed', '--no-user', '--prefix', prefix.path,
+            '--no-warn-script-location',
+        ]  # type: List[str]
+        if logger.getEffectiveLevel() <= logging.DEBUG:
+            args.append('-v')
+        for format_control in ('no_binary', 'only_binary'):
+            formats = getattr(finder.format_control, format_control)
+            args.extend(('--' + format_control.replace('_', '-'),
+                         ','.join(sorted(formats or {':none:'}))))
+
+        index_urls = finder.index_urls
+        if index_urls:
+            args.extend(['-i', index_urls[0]])
+            for extra_index in index_urls[1:]:
+                args.extend(['--extra-index-url', extra_index])
+        else:
+            args.append('--no-index')
+        for link in finder.find_links:
+            args.extend(['--find-links', link])
+
+        for host in finder.trusted_hosts:
+            args.extend(['--trusted-host', host])
+        if finder.allow_all_prereleases:
+            args.append('--pre')
+        if finder.prefer_binary:
+            args.append('--prefer-binary')
+        args.append('--')
+        args.extend(requirements)
+        with open_spinner(message) as spinner:
+            call_subprocess(args, spinner=spinner)
+
+
+class NoOpBuildEnvironment(BuildEnvironment):
+    """A no-op drop-in replacement for BuildEnvironment
+    """
+
+    def __init__(self):
+        # type: () -> None
+        pass
+
+    def __enter__(self):
+        # type: () -> None
+        pass
+
+    def __exit__(
+        self,
+        exc_type,  # type: Optional[Type[BaseException]]
+        exc_val,  # type: Optional[BaseException]
+        exc_tb  # type: Optional[TracebackType]
+    ):
+        # type: (...) -> None
+        pass
+
+    def cleanup(self):
+        # type: () -> None
+        pass
+
+    def install_requirements(
+        self,
+        finder,  # type: PackageFinder
+        requirements,  # type: Iterable[str]
+        prefix_as_string,  # type: str
+        message  # type: str
+    ):
+        # type: (...) -> None
+        raise NotImplementedError()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cache.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cache.py
new file mode 100644
index 0000000..07db948
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cache.py
@@ -0,0 +1,346 @@
+"""Cache Management
+"""
+
+import hashlib
+import json
+import logging
+import os
+
+from pip._vendor.packaging.tags import interpreter_name, interpreter_version
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.exceptions import InvalidWheelFilename
+from pip._internal.models.link import Link
+from pip._internal.models.wheel import Wheel
+from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.urls import path_to_url
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Set, List, Any, Dict
+
+    from pip._vendor.packaging.tags import Tag
+
+    from pip._internal.models.format_control import FormatControl
+
+logger = logging.getLogger(__name__)
+
+
+def _hash_dict(d):
+    # type: (Dict[str, str]) -> str
+    """Return a stable sha224 of a dictionary."""
+    s = json.dumps(d, sort_keys=True, separators=(",", ":"), ensure_ascii=True)
+    return hashlib.sha224(s.encode("ascii")).hexdigest()
+
+
+class Cache(object):
+    """An abstract class - provides cache directories for data from links
+
+
+        :param cache_dir: The root of the cache.
+        :param format_control: An object of FormatControl class to limit
+            binaries being read from the cache.
+        :param allowed_formats: which formats of files the cache should store.
+            ('binary' and 'source' are the only allowed values)
+    """
+
+    def __init__(self, cache_dir, format_control, allowed_formats):
+        # type: (str, FormatControl, Set[str]) -> None
+        super(Cache, self).__init__()
+        assert not cache_dir or os.path.isabs(cache_dir)
+        self.cache_dir = cache_dir or None
+        self.format_control = format_control
+        self.allowed_formats = allowed_formats
+
+        _valid_formats = {"source", "binary"}
+        assert self.allowed_formats.union(_valid_formats) == _valid_formats
+
+    def _get_cache_path_parts_legacy(self, link):
+        # type: (Link) -> List[str]
+        """Get parts of part that must be os.path.joined with cache_dir
+
+        Legacy cache key (pip < 20) for compatibility with older caches.
+        """
+
+        # We want to generate an url to use as our cache key, we don't want to
+        # just re-use the URL because it might have other items in the fragment
+        # and we don't care about those.
+        key_parts = [link.url_without_fragment]
+        if link.hash_name is not None and link.hash is not None:
+            key_parts.append("=".join([link.hash_name, link.hash]))
+        key_url = "#".join(key_parts)
+
+        # Encode our key url with sha224, we'll use this because it has similar
+        # security properties to sha256, but with a shorter total output (and
+        # thus less secure). However the differences don't make a lot of
+        # difference for our use case here.
+        hashed = hashlib.sha224(key_url.encode()).hexdigest()
+
+        # We want to nest the directories some to prevent having a ton of top
+        # level directories where we might run out of sub directories on some
+        # FS.
+        parts = [hashed[:2], hashed[2:4], hashed[4:6], hashed[6:]]
+
+        return parts
+
+    def _get_cache_path_parts(self, link):
+        # type: (Link) -> List[str]
+        """Get parts of part that must be os.path.joined with cache_dir
+        """
+
+        # We want to generate an url to use as our cache key, we don't want to
+        # just re-use the URL because it might have other items in the fragment
+        # and we don't care about those.
+        key_parts = {"url": link.url_without_fragment}
+        if link.hash_name is not None and link.hash is not None:
+            key_parts[link.hash_name] = link.hash
+        if link.subdirectory_fragment:
+            key_parts["subdirectory"] = link.subdirectory_fragment
+
+        # Include interpreter name, major and minor version in cache key
+        # to cope with ill-behaved sdists that build a different wheel
+        # depending on the python version their setup.py is being run on,
+        # and don't encode the difference in compatibility tags.
+        # https://github.com/pypa/pip/issues/7296
+        key_parts["interpreter_name"] = interpreter_name()
+        key_parts["interpreter_version"] = interpreter_version()
+
+        # Encode our key url with sha224, we'll use this because it has similar
+        # security properties to sha256, but with a shorter total output (and
+        # thus less secure). However the differences don't make a lot of
+        # difference for our use case here.
+        hashed = _hash_dict(key_parts)
+
+        # We want to nest the directories some to prevent having a ton of top
+        # level directories where we might run out of sub directories on some
+        # FS.
+        parts = [hashed[:2], hashed[2:4], hashed[4:6], hashed[6:]]
+
+        return parts
+
+    def _get_candidates(self, link, canonical_package_name):
+        # type: (Link, str) -> List[Any]
+        can_not_cache = (
+            not self.cache_dir or
+            not canonical_package_name or
+            not link
+        )
+        if can_not_cache:
+            return []
+
+        formats = self.format_control.get_allowed_formats(
+            canonical_package_name
+        )
+        if not self.allowed_formats.intersection(formats):
+            return []
+
+        candidates = []
+        path = self.get_path_for_link(link)
+        if os.path.isdir(path):
+            for candidate in os.listdir(path):
+                candidates.append((candidate, path))
+        # TODO remove legacy path lookup in pip>=21
+        legacy_path = self.get_path_for_link_legacy(link)
+        if os.path.isdir(legacy_path):
+            for candidate in os.listdir(legacy_path):
+                candidates.append((candidate, legacy_path))
+        return candidates
+
+    def get_path_for_link_legacy(self, link):
+        # type: (Link) -> str
+        raise NotImplementedError()
+
+    def get_path_for_link(self, link):
+        # type: (Link) -> str
+        """Return a directory to store cached items in for link.
+        """
+        raise NotImplementedError()
+
+    def get(
+        self,
+        link,            # type: Link
+        package_name,    # type: Optional[str]
+        supported_tags,  # type: List[Tag]
+    ):
+        # type: (...) -> Link
+        """Returns a link to a cached item if it exists, otherwise returns the
+        passed link.
+        """
+        raise NotImplementedError()
+
+
+class SimpleWheelCache(Cache):
+    """A cache of wheels for future installs.
+    """
+
+    def __init__(self, cache_dir, format_control):
+        # type: (str, FormatControl) -> None
+        super(SimpleWheelCache, self).__init__(
+            cache_dir, format_control, {"binary"}
+        )
+
+    def get_path_for_link_legacy(self, link):
+        # type: (Link) -> str
+        parts = self._get_cache_path_parts_legacy(link)
+        assert self.cache_dir
+        return os.path.join(self.cache_dir, "wheels", *parts)
+
+    def get_path_for_link(self, link):
+        # type: (Link) -> str
+        """Return a directory to store cached wheels for link
+
+        Because there are M wheels for any one sdist, we provide a directory
+        to cache them in, and then consult that directory when looking up
+        cache hits.
+
+        We only insert things into the cache if they have plausible version
+        numbers, so that we don't contaminate the cache with things that were
+        not unique. E.g. ./package might have dozens of installs done for it
+        and build a version of 0.0...and if we built and cached a wheel, we'd
+        end up using the same wheel even if the source has been edited.
+
+        :param link: The link of the sdist for which this will cache wheels.
+        """
+        parts = self._get_cache_path_parts(link)
+        assert self.cache_dir
+        # Store wheels within the root cache_dir
+        return os.path.join(self.cache_dir, "wheels", *parts)
+
+    def get(
+        self,
+        link,            # type: Link
+        package_name,    # type: Optional[str]
+        supported_tags,  # type: List[Tag]
+    ):
+        # type: (...) -> Link
+        candidates = []
+
+        if not package_name:
+            return link
+
+        canonical_package_name = canonicalize_name(package_name)
+        for wheel_name, wheel_dir in self._get_candidates(
+            link, canonical_package_name
+        ):
+            try:
+                wheel = Wheel(wheel_name)
+            except InvalidWheelFilename:
+                continue
+            if canonicalize_name(wheel.name) != canonical_package_name:
+                logger.debug(
+                    "Ignoring cached wheel %s for %s as it "
+                    "does not match the expected distribution name %s.",
+                    wheel_name, link, package_name,
+                )
+                continue
+            if not wheel.supported(supported_tags):
+                # Built for a different python/arch/etc
+                continue
+            candidates.append(
+                (
+                    wheel.support_index_min(supported_tags),
+                    wheel_name,
+                    wheel_dir,
+                )
+            )
+
+        if not candidates:
+            return link
+
+        _, wheel_name, wheel_dir = min(candidates)
+        return Link(path_to_url(os.path.join(wheel_dir, wheel_name)))
+
+
+class EphemWheelCache(SimpleWheelCache):
+    """A SimpleWheelCache that creates it's own temporary cache directory
+    """
+
+    def __init__(self, format_control):
+        # type: (FormatControl) -> None
+        self._temp_dir = TempDirectory(
+            kind=tempdir_kinds.EPHEM_WHEEL_CACHE,
+            globally_managed=True,
+        )
+
+        super(EphemWheelCache, self).__init__(
+            self._temp_dir.path, format_control
+        )
+
+
+class CacheEntry(object):
+    def __init__(
+        self,
+        link,  # type: Link
+        persistent,  # type: bool
+    ):
+        self.link = link
+        self.persistent = persistent
+
+
+class WheelCache(Cache):
+    """Wraps EphemWheelCache and SimpleWheelCache into a single Cache
+
+    This Cache allows for gracefully degradation, using the ephem wheel cache
+    when a certain link is not found in the simple wheel cache first.
+    """
+
+    def __init__(self, cache_dir, format_control):
+        # type: (str, FormatControl) -> None
+        super(WheelCache, self).__init__(
+            cache_dir, format_control, {'binary'}
+        )
+        self._wheel_cache = SimpleWheelCache(cache_dir, format_control)
+        self._ephem_cache = EphemWheelCache(format_control)
+
+    def get_path_for_link_legacy(self, link):
+        # type: (Link) -> str
+        return self._wheel_cache.get_path_for_link_legacy(link)
+
+    def get_path_for_link(self, link):
+        # type: (Link) -> str
+        return self._wheel_cache.get_path_for_link(link)
+
+    def get_ephem_path_for_link(self, link):
+        # type: (Link) -> str
+        return self._ephem_cache.get_path_for_link(link)
+
+    def get(
+        self,
+        link,            # type: Link
+        package_name,    # type: Optional[str]
+        supported_tags,  # type: List[Tag]
+    ):
+        # type: (...) -> Link
+        cache_entry = self.get_cache_entry(link, package_name, supported_tags)
+        if cache_entry is None:
+            return link
+        return cache_entry.link
+
+    def get_cache_entry(
+        self,
+        link,            # type: Link
+        package_name,    # type: Optional[str]
+        supported_tags,  # type: List[Tag]
+    ):
+        # type: (...) -> Optional[CacheEntry]
+        """Returns a CacheEntry with a link to a cached item if it exists or
+        None. The cache entry indicates if the item was found in the persistent
+        or ephemeral cache.
+        """
+        retval = self._wheel_cache.get(
+            link=link,
+            package_name=package_name,
+            supported_tags=supported_tags,
+        )
+        if retval is not link:
+            return CacheEntry(retval, persistent=True)
+
+        retval = self._ephem_cache.get(
+            link=link,
+            package_name=package_name,
+            supported_tags=supported_tags,
+        )
+        if retval is not link:
+            return CacheEntry(retval, persistent=False)
+
+        return None
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/__init__.py
new file mode 100644
index 0000000..e589bb9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/__init__.py
@@ -0,0 +1,4 @@
+"""Subpackage containing all of pip's command line interface related code
+"""
+
+# This file intentionally does not import submodules
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/autocompletion.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/autocompletion.py
new file mode 100644
index 0000000..329de60
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/autocompletion.py
@@ -0,0 +1,164 @@
+"""Logic that powers autocompletion installed by ``pip completion``.
+"""
+
+import optparse
+import os
+import sys
+from itertools import chain
+
+from pip._internal.cli.main_parser import create_main_parser
+from pip._internal.commands import commands_dict, create_command
+from pip._internal.utils.misc import get_installed_distributions
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Iterable, List, Optional
+
+
+def autocomplete():
+    # type: () -> None
+    """Entry Point for completion of main and subcommand options.
+    """
+    # Don't complete if user hasn't sourced bash_completion file.
+    if 'PIP_AUTO_COMPLETE' not in os.environ:
+        return
+    cwords = os.environ['COMP_WORDS'].split()[1:]
+    cword = int(os.environ['COMP_CWORD'])
+    try:
+        current = cwords[cword - 1]
+    except IndexError:
+        current = ''
+
+    parser = create_main_parser()
+    subcommands = list(commands_dict)
+    options = []
+
+    # subcommand
+    subcommand_name = None  # type: Optional[str]
+    for word in cwords:
+        if word in subcommands:
+            subcommand_name = word
+            break
+    # subcommand options
+    if subcommand_name is not None:
+        # special case: 'help' subcommand has no options
+        if subcommand_name == 'help':
+            sys.exit(1)
+        # special case: list locally installed dists for show and uninstall
+        should_list_installed = (
+            subcommand_name in ['show', 'uninstall'] and
+            not current.startswith('-')
+        )
+        if should_list_installed:
+            installed = []
+            lc = current.lower()
+            for dist in get_installed_distributions(local_only=True):
+                if dist.key.startswith(lc) and dist.key not in cwords[1:]:
+                    installed.append(dist.key)
+            # if there are no dists installed, fall back to option completion
+            if installed:
+                for dist in installed:
+                    print(dist)
+                sys.exit(1)
+
+        subcommand = create_command(subcommand_name)
+
+        for opt in subcommand.parser.option_list_all:
+            if opt.help != optparse.SUPPRESS_HELP:
+                for opt_str in opt._long_opts + opt._short_opts:
+                    options.append((opt_str, opt.nargs))
+
+        # filter out previously specified options from available options
+        prev_opts = [x.split('=')[0] for x in cwords[1:cword - 1]]
+        options = [(x, v) for (x, v) in options if x not in prev_opts]
+        # filter options by current input
+        options = [(k, v) for k, v in options if k.startswith(current)]
+        # get completion type given cwords and available subcommand options
+        completion_type = get_path_completion_type(
+            cwords, cword, subcommand.parser.option_list_all,
+        )
+        # get completion files and directories if ``completion_type`` is
+        # ``<file>``, ``<dir>`` or ``<path>``
+        if completion_type:
+            paths = auto_complete_paths(current, completion_type)
+            options = [(path, 0) for path in paths]
+        for option in options:
+            opt_label = option[0]
+            # append '=' to options which require args
+            if option[1] and option[0][:2] == "--":
+                opt_label += '='
+            print(opt_label)
+    else:
+        # show main parser options only when necessary
+
+        opts = [i.option_list for i in parser.option_groups]
+        opts.append(parser.option_list)
+        flattened_opts = chain.from_iterable(opts)
+        if current.startswith('-'):
+            for opt in flattened_opts:
+                if opt.help != optparse.SUPPRESS_HELP:
+                    subcommands += opt._long_opts + opt._short_opts
+        else:
+            # get completion type given cwords and all available options
+            completion_type = get_path_completion_type(cwords, cword,
+                                                       flattened_opts)
+            if completion_type:
+                subcommands = list(auto_complete_paths(current,
+                                                       completion_type))
+
+        print(' '.join([x for x in subcommands if x.startswith(current)]))
+    sys.exit(1)
+
+
+def get_path_completion_type(cwords, cword, opts):
+    # type: (List[str], int, Iterable[Any]) -> Optional[str]
+    """Get the type of path completion (``file``, ``dir``, ``path`` or None)
+
+    :param cwords: same as the environmental variable ``COMP_WORDS``
+    :param cword: same as the environmental variable ``COMP_CWORD``
+    :param opts: The available options to check
+    :return: path completion type (``file``, ``dir``, ``path`` or None)
+    """
+    if cword < 2 or not cwords[cword - 2].startswith('-'):
+        return None
+    for opt in opts:
+        if opt.help == optparse.SUPPRESS_HELP:
+            continue
+        for o in str(opt).split('/'):
+            if cwords[cword - 2].split('=')[0] == o:
+                if not opt.metavar or any(
+                        x in ('path', 'file', 'dir')
+                        for x in opt.metavar.split('/')):
+                    return opt.metavar
+    return None
+
+
+def auto_complete_paths(current, completion_type):
+    # type: (str, str) -> Iterable[str]
+    """If ``completion_type`` is ``file`` or ``path``, list all regular files
+    and directories starting with ``current``; otherwise only list directories
+    starting with ``current``.
+
+    :param current: The word to be completed
+    :param completion_type: path completion type(`file`, `path` or `dir`)i
+    :return: A generator of regular files and/or directories
+    """
+    directory, filename = os.path.split(current)
+    current_path = os.path.abspath(directory)
+    # Don't complete paths if they can't be accessed
+    if not os.access(current_path, os.R_OK):
+        return
+    filename = os.path.normcase(filename)
+    # list all files that start with ``filename``
+    file_list = (x for x in os.listdir(current_path)
+                 if os.path.normcase(x).startswith(filename))
+    for f in file_list:
+        opt = os.path.join(current_path, f)
+        comp_file = os.path.normcase(os.path.join(directory, f))
+        # complete regular files when there is not ``<dir>`` after option
+        # complete directories when there is ``<file>``, ``<path>`` or
+        # ``<dir>``after option
+        if completion_type != 'dir' and os.path.isfile(opt):
+            yield comp_file
+        elif os.path.isdir(opt):
+            yield os.path.join(comp_file, '')
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/base_command.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/base_command.py
new file mode 100644
index 0000000..197400a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/base_command.py
@@ -0,0 +1,265 @@
+"""Base Command class, and related routines"""
+
+from __future__ import absolute_import, print_function
+
+import logging
+import logging.config
+import optparse
+import os
+import platform
+import sys
+import traceback
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.command_context import CommandContextMixIn
+from pip._internal.cli.parser import (
+    ConfigOptionParser,
+    UpdatingDefaultsHelpFormatter,
+)
+from pip._internal.cli.status_codes import (
+    ERROR,
+    PREVIOUS_BUILD_DIR_ERROR,
+    UNKNOWN_ERROR,
+    VIRTUALENV_NOT_FOUND,
+)
+from pip._internal.exceptions import (
+    BadCommand,
+    CommandError,
+    InstallationError,
+    NetworkConnectionError,
+    PreviousBuildDirError,
+    SubProcessError,
+    UninstallationError,
+)
+from pip._internal.utils.deprecation import deprecated
+from pip._internal.utils.filesystem import check_path_owner
+from pip._internal.utils.logging import BrokenStdoutLoggingError, setup_logging
+from pip._internal.utils.misc import get_prog, normalize_path
+from pip._internal.utils.temp_dir import (
+    global_tempdir_manager,
+    tempdir_registry,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional, Tuple, Any
+    from optparse import Values
+
+    from pip._internal.utils.temp_dir import (
+        TempDirectoryTypeRegistry as TempDirRegistry
+    )
+
+__all__ = ['Command']
+
+logger = logging.getLogger(__name__)
+
+
+class Command(CommandContextMixIn):
+    usage = None  # type: str
+    ignore_require_venv = False  # type: bool
+
+    def __init__(self, name, summary, isolated=False):
+        # type: (str, str, bool) -> None
+        super(Command, self).__init__()
+        parser_kw = {
+            'usage': self.usage,
+            'prog': '{} {}'.format(get_prog(), name),
+            'formatter': UpdatingDefaultsHelpFormatter(),
+            'add_help_option': False,
+            'name': name,
+            'description': self.__doc__,
+            'isolated': isolated,
+        }
+
+        self.name = name
+        self.summary = summary
+        self.parser = ConfigOptionParser(**parser_kw)
+
+        self.tempdir_registry = None  # type: Optional[TempDirRegistry]
+
+        # Commands should add options to this option group
+        optgroup_name = '{} Options'.format(self.name.capitalize())
+        self.cmd_opts = optparse.OptionGroup(self.parser, optgroup_name)
+
+        # Add the general options
+        gen_opts = cmdoptions.make_option_group(
+            cmdoptions.general_group,
+            self.parser,
+        )
+        self.parser.add_option_group(gen_opts)
+
+        self.add_options()
+
+    def add_options(self):
+        # type: () -> None
+        pass
+
+    def handle_pip_version_check(self, options):
+        # type: (Values) -> None
+        """
+        This is a no-op so that commands by default do not do the pip version
+        check.
+        """
+        # Make sure we do the pip version check if the index_group options
+        # are present.
+        assert not hasattr(options, 'no_index')
+
+    def run(self, options, args):
+        # type: (Values, List[Any]) -> int
+        raise NotImplementedError
+
+    def parse_args(self, args):
+        # type: (List[str]) -> Tuple[Any, Any]
+        # factored out for testability
+        return self.parser.parse_args(args)
+
+    def main(self, args):
+        # type: (List[str]) -> int
+        try:
+            with self.main_context():
+                return self._main(args)
+        finally:
+            logging.shutdown()
+
+    def _main(self, args):
+        # type: (List[str]) -> int
+        # We must initialize this before the tempdir manager, otherwise the
+        # configuration would not be accessible by the time we clean up the
+        # tempdir manager.
+        self.tempdir_registry = self.enter_context(tempdir_registry())
+        # Intentionally set as early as possible so globally-managed temporary
+        # directories are available to the rest of the code.
+        self.enter_context(global_tempdir_manager())
+
+        options, args = self.parse_args(args)
+
+        # Set verbosity so that it can be used elsewhere.
+        self.verbosity = options.verbose - options.quiet
+
+        level_number = setup_logging(
+            verbosity=self.verbosity,
+            no_color=options.no_color,
+            user_log_file=options.log,
+        )
+
+        if (
+            sys.version_info[:2] == (2, 7) and
+            not options.no_python_version_warning
+        ):
+            message = (
+                "pip 21.0 will drop support for Python 2.7 in January 2021. "
+                "More details about Python 2 support in pip can be found at "
+                "https://pip.pypa.io/en/latest/development/release-process/#python-2-support"  # noqa
+            )
+            if platform.python_implementation() == "CPython":
+                message = (
+                    "Python 2.7 reached the end of its life on January "
+                    "1st, 2020. Please upgrade your Python as Python 2.7 "
+                    "is no longer maintained. "
+                ) + message
+            deprecated(message, replacement=None, gone_in="21.0")
+
+        if (
+            sys.version_info[:2] == (3, 5) and
+            not options.no_python_version_warning
+        ):
+            message = (
+                "Python 3.5 reached the end of its life on September "
+                "13th, 2020. Please upgrade your Python as Python 3.5 "
+                "is no longer maintained. pip 21.0 will drop support "
+                "for Python 3.5 in January 2021."
+            )
+            deprecated(message, replacement=None, gone_in="21.0")
+
+        # TODO: Try to get these passing down from the command?
+        #       without resorting to os.environ to hold these.
+        #       This also affects isolated builds and it should.
+
+        if options.no_input:
+            os.environ['PIP_NO_INPUT'] = '1'
+
+        if options.exists_action:
+            os.environ['PIP_EXISTS_ACTION'] = ' '.join(options.exists_action)
+
+        if options.require_venv and not self.ignore_require_venv:
+            # If a venv is required check if it can really be found
+            if not running_under_virtualenv():
+                logger.critical(
+                    'Could not find an activated virtualenv (required).'
+                )
+                sys.exit(VIRTUALENV_NOT_FOUND)
+
+        if options.cache_dir:
+            options.cache_dir = normalize_path(options.cache_dir)
+            if not check_path_owner(options.cache_dir):
+                logger.warning(
+                    "The directory '%s' or its parent directory is not owned "
+                    "or is not writable by the current user. The cache "
+                    "has been disabled. Check the permissions and owner of "
+                    "that directory. If executing pip with sudo, you may want "
+                    "sudo's -H flag.",
+                    options.cache_dir,
+                )
+                options.cache_dir = None
+
+        if getattr(options, "build_dir", None):
+            deprecated(
+                reason=(
+                    "The -b/--build/--build-dir/--build-directory "
+                    "option is deprecated."
+                ),
+                replacement=(
+                    "use the TMPDIR/TEMP/TMP environment variable, "
+                    "possibly combined with --no-clean"
+                ),
+                gone_in="20.3",
+                issue=8333,
+            )
+
+        if 'resolver' in options.unstable_features:
+            logger.critical(
+                "--unstable-feature=resolver is no longer supported, and "
+                "has been replaced with --use-feature=2020-resolver instead."
+            )
+            sys.exit(ERROR)
+
+        try:
+            status = self.run(options, args)
+            assert isinstance(status, int)
+            return status
+        except PreviousBuildDirError as exc:
+            logger.critical(str(exc))
+            logger.debug('Exception information:', exc_info=True)
+
+            return PREVIOUS_BUILD_DIR_ERROR
+        except (InstallationError, UninstallationError, BadCommand,
+                SubProcessError, NetworkConnectionError) as exc:
+            logger.critical(str(exc))
+            logger.debug('Exception information:', exc_info=True)
+
+            return ERROR
+        except CommandError as exc:
+            logger.critical('%s', exc)
+            logger.debug('Exception information:', exc_info=True)
+
+            return ERROR
+        except BrokenStdoutLoggingError:
+            # Bypass our logger and write any remaining messages to stderr
+            # because stdout no longer works.
+            print('ERROR: Pipe to stdout was broken', file=sys.stderr)
+            if level_number <= logging.DEBUG:
+                traceback.print_exc(file=sys.stderr)
+
+            return ERROR
+        except KeyboardInterrupt:
+            logger.critical('Operation cancelled by user')
+            logger.debug('Exception information:', exc_info=True)
+
+            return ERROR
+        except BaseException:
+            logger.critical('Exception:', exc_info=True)
+
+            return UNKNOWN_ERROR
+        finally:
+            self.handle_pip_version_check(options)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/cmdoptions.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/cmdoptions.py
new file mode 100644
index 0000000..ed42c5f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/cmdoptions.py
@@ -0,0 +1,975 @@
+"""
+shared options and groups
+
+The principle here is to define options once, but *not* instantiate them
+globally. One reason being that options with action='append' can carry state
+between parses. pip parses general options twice internally, and shouldn't
+pass on state. To be consistent, all options will follow this design.
+"""
+
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+from __future__ import absolute_import
+
+import os
+import textwrap
+import warnings
+from distutils.util import strtobool
+from functools import partial
+from optparse import SUPPRESS_HELP, Option, OptionGroup
+from textwrap import dedent
+
+from pip._internal.cli.progress_bars import BAR_TYPES
+from pip._internal.exceptions import CommandError
+from pip._internal.locations import USER_CACHE_DIR, get_src_prefix
+from pip._internal.models.format_control import FormatControl
+from pip._internal.models.index import PyPI
+from pip._internal.models.target_python import TargetPython
+from pip._internal.utils.hashes import STRONG_HASHES
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Callable, Dict, Optional, Tuple
+    from optparse import OptionParser, Values
+    from pip._internal.cli.parser import ConfigOptionParser
+
+
+def raise_option_error(parser, option, msg):
+    # type: (OptionParser, Option, str) -> None
+    """
+    Raise an option parsing error using parser.error().
+
+    Args:
+      parser: an OptionParser instance.
+      option: an Option instance.
+      msg: the error text.
+    """
+    msg = '{} error: {}'.format(option, msg)
+    msg = textwrap.fill(' '.join(msg.split()))
+    parser.error(msg)
+
+
+def make_option_group(group, parser):
+    # type: (Dict[str, Any], ConfigOptionParser) -> OptionGroup
+    """
+    Return an OptionGroup object
+    group  -- assumed to be dict with 'name' and 'options' keys
+    parser -- an optparse Parser
+    """
+    option_group = OptionGroup(parser, group['name'])
+    for option in group['options']:
+        option_group.add_option(option())
+    return option_group
+
+
+def check_install_build_global(options, check_options=None):
+    # type: (Values, Optional[Values]) -> None
+    """Disable wheels if per-setup.py call options are set.
+
+    :param options: The OptionParser options to update.
+    :param check_options: The options to check, if not supplied defaults to
+        options.
+    """
+    if check_options is None:
+        check_options = options
+
+    def getname(n):
+        # type: (str) -> Optional[Any]
+        return getattr(check_options, n, None)
+    names = ["build_options", "global_options", "install_options"]
+    if any(map(getname, names)):
+        control = options.format_control
+        control.disallow_binaries()
+        warnings.warn(
+            'Disabling all use of wheels due to the use of --build-option '
+            '/ --global-option / --install-option.', stacklevel=2,
+        )
+
+
+def check_dist_restriction(options, check_target=False):
+    # type: (Values, bool) -> None
+    """Function for determining if custom platform options are allowed.
+
+    :param options: The OptionParser options.
+    :param check_target: Whether or not to check if --target is being used.
+    """
+    dist_restriction_set = any([
+        options.python_version,
+        options.platform,
+        options.abi,
+        options.implementation,
+    ])
+
+    binary_only = FormatControl(set(), {':all:'})
+    sdist_dependencies_allowed = (
+        options.format_control != binary_only and
+        not options.ignore_dependencies
+    )
+
+    # Installations or downloads using dist restrictions must not combine
+    # source distributions and dist-specific wheels, as they are not
+    # guaranteed to be locally compatible.
+    if dist_restriction_set and sdist_dependencies_allowed:
+        raise CommandError(
+            "When restricting platform and interpreter constraints using "
+            "--python-version, --platform, --abi, or --implementation, "
+            "either --no-deps must be set, or --only-binary=:all: must be "
+            "set and --no-binary must not be set (or must be set to "
+            ":none:)."
+        )
+
+    if check_target:
+        if dist_restriction_set and not options.target_dir:
+            raise CommandError(
+                "Can not use any platform or abi specific options unless "
+                "installing via '--target'"
+            )
+
+
+def _path_option_check(option, opt, value):
+    # type: (Option, str, str) -> str
+    return os.path.expanduser(value)
+
+
+class PipOption(Option):
+    TYPES = Option.TYPES + ("path",)
+    TYPE_CHECKER = Option.TYPE_CHECKER.copy()
+    TYPE_CHECKER["path"] = _path_option_check
+
+
+###########
+# options #
+###########
+
+help_ = partial(
+    Option,
+    '-h', '--help',
+    dest='help',
+    action='help',
+    help='Show help.',
+)  # type: Callable[..., Option]
+
+isolated_mode = partial(
+    Option,
+    "--isolated",
+    dest="isolated_mode",
+    action="store_true",
+    default=False,
+    help=(
+        "Run pip in an isolated mode, ignoring environment variables and user "
+        "configuration."
+    ),
+)  # type: Callable[..., Option]
+
+require_virtualenv = partial(
+    Option,
+    # Run only if inside a virtualenv, bail if not.
+    '--require-virtualenv', '--require-venv',
+    dest='require_venv',
+    action='store_true',
+    default=False,
+    help=SUPPRESS_HELP
+)  # type: Callable[..., Option]
+
+verbose = partial(
+    Option,
+    '-v', '--verbose',
+    dest='verbose',
+    action='count',
+    default=0,
+    help='Give more output. Option is additive, and can be used up to 3 times.'
+)  # type: Callable[..., Option]
+
+no_color = partial(
+    Option,
+    '--no-color',
+    dest='no_color',
+    action='store_true',
+    default=False,
+    help="Suppress colored output",
+)  # type: Callable[..., Option]
+
+version = partial(
+    Option,
+    '-V', '--version',
+    dest='version',
+    action='store_true',
+    help='Show version and exit.',
+)  # type: Callable[..., Option]
+
+quiet = partial(
+    Option,
+    '-q', '--quiet',
+    dest='quiet',
+    action='count',
+    default=0,
+    help=(
+        'Give less output. Option is additive, and can be used up to 3'
+        ' times (corresponding to WARNING, ERROR, and CRITICAL logging'
+        ' levels).'
+    ),
+)  # type: Callable[..., Option]
+
+progress_bar = partial(
+    Option,
+    '--progress-bar',
+    dest='progress_bar',
+    type='choice',
+    choices=list(BAR_TYPES.keys()),
+    default='on',
+    help=(
+        'Specify type of progress to be displayed [' +
+        '|'.join(BAR_TYPES.keys()) + '] (default: %default)'
+    ),
+)  # type: Callable[..., Option]
+
+log = partial(
+    PipOption,
+    "--log", "--log-file", "--local-log",
+    dest="log",
+    metavar="path",
+    type="path",
+    help="Path to a verbose appending log."
+)  # type: Callable[..., Option]
+
+no_input = partial(
+    Option,
+    # Don't ask for input
+    '--no-input',
+    dest='no_input',
+    action='store_true',
+    default=False,
+    help="Disable prompting for input."
+)  # type: Callable[..., Option]
+
+proxy = partial(
+    Option,
+    '--proxy',
+    dest='proxy',
+    type='str',
+    default='',
+    help="Specify a proxy in the form [user:passwd@]proxy.server:port."
+)  # type: Callable[..., Option]
+
+retries = partial(
+    Option,
+    '--retries',
+    dest='retries',
+    type='int',
+    default=5,
+    help="Maximum number of retries each connection should attempt "
+         "(default %default times).",
+)  # type: Callable[..., Option]
+
+timeout = partial(
+    Option,
+    '--timeout', '--default-timeout',
+    metavar='sec',
+    dest='timeout',
+    type='float',
+    default=15,
+    help='Set the socket timeout (default %default seconds).',
+)  # type: Callable[..., Option]
+
+
+def exists_action():
+    # type: () -> Option
+    return Option(
+        # Option when path already exist
+        '--exists-action',
+        dest='exists_action',
+        type='choice',
+        choices=['s', 'i', 'w', 'b', 'a'],
+        default=[],
+        action='append',
+        metavar='action',
+        help="Default action when a path already exists: "
+             "(s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.",
+    )
+
+
+cert = partial(
+    PipOption,
+    '--cert',
+    dest='cert',
+    type='path',
+    metavar='path',
+    help="Path to alternate CA bundle.",
+)  # type: Callable[..., Option]
+
+client_cert = partial(
+    PipOption,
+    '--client-cert',
+    dest='client_cert',
+    type='path',
+    default=None,
+    metavar='path',
+    help="Path to SSL client certificate, a single file containing the "
+         "private key and the certificate in PEM format.",
+)  # type: Callable[..., Option]
+
+index_url = partial(
+    Option,
+    '-i', '--index-url', '--pypi-url',
+    dest='index_url',
+    metavar='URL',
+    default=PyPI.simple_url,
+    help="Base URL of the Python Package Index (default %default). "
+         "This should point to a repository compliant with PEP 503 "
+         "(the simple repository API) or a local directory laid out "
+         "in the same format.",
+)  # type: Callable[..., Option]
+
+
+def extra_index_url():
+    # type: () -> Option
+    return Option(
+        '--extra-index-url',
+        dest='extra_index_urls',
+        metavar='URL',
+        action='append',
+        default=[],
+        help="Extra URLs of package indexes to use in addition to "
+             "--index-url. Should follow the same rules as "
+             "--index-url.",
+    )
+
+
+no_index = partial(
+    Option,
+    '--no-index',
+    dest='no_index',
+    action='store_true',
+    default=False,
+    help='Ignore package index (only looking at --find-links URLs instead).',
+)  # type: Callable[..., Option]
+
+
+def find_links():
+    # type: () -> Option
+    return Option(
+        '-f', '--find-links',
+        dest='find_links',
+        action='append',
+        default=[],
+        metavar='url',
+        help="If a URL or path to an html file, then parse for links to "
+             "archives such as sdist (.tar.gz) or wheel (.whl) files. "
+             "If a local path or file:// URL that's a directory,  "
+             "then look for archives in the directory listing. "
+             "Links to VCS project URLs are not supported.",
+    )
+
+
+def trusted_host():
+    # type: () -> Option
+    return Option(
+        "--trusted-host",
+        dest="trusted_hosts",
+        action="append",
+        metavar="HOSTNAME",
+        default=[],
+        help="Mark this host or host:port pair as trusted, even though it "
+             "does not have valid or any HTTPS.",
+    )
+
+
+def constraints():
+    # type: () -> Option
+    return Option(
+        '-c', '--constraint',
+        dest='constraints',
+        action='append',
+        default=[],
+        metavar='file',
+        help='Constrain versions using the given constraints file. '
+        'This option can be used multiple times.'
+    )
+
+
+def requirements():
+    # type: () -> Option
+    return Option(
+        '-r', '--requirement',
+        dest='requirements',
+        action='append',
+        default=[],
+        metavar='file',
+        help='Install from the given requirements file. '
+        'This option can be used multiple times.'
+    )
+
+
+def editable():
+    # type: () -> Option
+    return Option(
+        '-e', '--editable',
+        dest='editables',
+        action='append',
+        default=[],
+        metavar='path/url',
+        help=('Install a project in editable mode (i.e. setuptools '
+              '"develop mode") from a local project path or a VCS url.'),
+    )
+
+
+def _handle_src(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    value = os.path.abspath(value)
+    setattr(parser.values, option.dest, value)
+
+
+src = partial(
+    PipOption,
+    '--src', '--source', '--source-dir', '--source-directory',
+    dest='src_dir',
+    type='path',
+    metavar='dir',
+    default=get_src_prefix(),
+    action='callback',
+    callback=_handle_src,
+    help='Directory to check out editable projects into. '
+    'The default in a virtualenv is "<venv path>/src". '
+    'The default for global installs is "<current dir>/src".'
+)  # type: Callable[..., Option]
+
+
+def _get_format_control(values, option):
+    # type: (Values, Option) -> Any
+    """Get a format_control object."""
+    return getattr(values, option.dest)
+
+
+def _handle_no_binary(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    existing = _get_format_control(parser.values, option)
+    FormatControl.handle_mutual_excludes(
+        value, existing.no_binary, existing.only_binary,
+    )
+
+
+def _handle_only_binary(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    existing = _get_format_control(parser.values, option)
+    FormatControl.handle_mutual_excludes(
+        value, existing.only_binary, existing.no_binary,
+    )
+
+
+def no_binary():
+    # type: () -> Option
+    format_control = FormatControl(set(), set())
+    return Option(
+        "--no-binary", dest="format_control", action="callback",
+        callback=_handle_no_binary, type="str",
+        default=format_control,
+        help='Do not use binary packages. Can be supplied multiple times, and '
+             'each time adds to the existing value. Accepts either ":all:" to '
+             'disable all binary packages, ":none:" to empty the set (notice '
+             'the colons), or one or more package names with commas between '
+             'them (no colons). Note that some packages are tricky to compile '
+             'and may fail to install when this option is used on them.',
+    )
+
+
+def only_binary():
+    # type: () -> Option
+    format_control = FormatControl(set(), set())
+    return Option(
+        "--only-binary", dest="format_control", action="callback",
+        callback=_handle_only_binary, type="str",
+        default=format_control,
+        help='Do not use source packages. Can be supplied multiple times, and '
+             'each time adds to the existing value. Accepts either ":all:" to '
+             'disable all source packages, ":none:" to empty the set, or one '
+             'or more package names with commas between them. Packages '
+             'without binary distributions will fail to install when this '
+             'option is used on them.',
+    )
+
+
+platform = partial(
+    Option,
+    '--platform',
+    dest='platform',
+    metavar='platform',
+    default=None,
+    help=("Only use wheels compatible with <platform>. "
+          "Defaults to the platform of the running system."),
+)  # type: Callable[..., Option]
+
+
+# This was made a separate function for unit-testing purposes.
+def _convert_python_version(value):
+    # type: (str) -> Tuple[Tuple[int, ...], Optional[str]]
+    """
+    Convert a version string like "3", "37", or "3.7.3" into a tuple of ints.
+
+    :return: A 2-tuple (version_info, error_msg), where `error_msg` is
+        non-None if and only if there was a parsing error.
+    """
+    if not value:
+        # The empty string is the same as not providing a value.
+        return (None, None)
+
+    parts = value.split('.')
+    if len(parts) > 3:
+        return ((), 'at most three version parts are allowed')
+
+    if len(parts) == 1:
+        # Then we are in the case of "3" or "37".
+        value = parts[0]
+        if len(value) > 1:
+            parts = [value[0], value[1:]]
+
+    try:
+        version_info = tuple(int(part) for part in parts)
+    except ValueError:
+        return ((), 'each version part must be an integer')
+
+    return (version_info, None)
+
+
+def _handle_python_version(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    """
+    Handle a provided --python-version value.
+    """
+    version_info, error_msg = _convert_python_version(value)
+    if error_msg is not None:
+        msg = (
+            'invalid --python-version value: {!r}: {}'.format(
+                value, error_msg,
+            )
+        )
+        raise_option_error(parser, option=option, msg=msg)
+
+    parser.values.python_version = version_info
+
+
+python_version = partial(
+    Option,
+    '--python-version',
+    dest='python_version',
+    metavar='python_version',
+    action='callback',
+    callback=_handle_python_version, type='str',
+    default=None,
+    help=dedent("""\
+    The Python interpreter version to use for wheel and "Requires-Python"
+    compatibility checks. Defaults to a version derived from the running
+    interpreter. The version can be specified using up to three dot-separated
+    integers (e.g. "3" for 3.0.0, "3.7" for 3.7.0, or "3.7.3"). A major-minor
+    version can also be given as a string without dots (e.g. "37" for 3.7.0).
+    """),
+)  # type: Callable[..., Option]
+
+
+implementation = partial(
+    Option,
+    '--implementation',
+    dest='implementation',
+    metavar='implementation',
+    default=None,
+    help=("Only use wheels compatible with Python "
+          "implementation <implementation>, e.g. 'pp', 'jy', 'cp', "
+          " or 'ip'. If not specified, then the current "
+          "interpreter implementation is used.  Use 'py' to force "
+          "implementation-agnostic wheels."),
+)  # type: Callable[..., Option]
+
+
+abi = partial(
+    Option,
+    '--abi',
+    dest='abi',
+    metavar='abi',
+    default=None,
+    help=("Only use wheels compatible with Python "
+          "abi <abi>, e.g. 'pypy_41'.  If not specified, then the "
+          "current interpreter abi tag is used.  Generally "
+          "you will need to specify --implementation, "
+          "--platform, and --python-version when using "
+          "this option."),
+)  # type: Callable[..., Option]
+
+
+def add_target_python_options(cmd_opts):
+    # type: (OptionGroup) -> None
+    cmd_opts.add_option(platform())
+    cmd_opts.add_option(python_version())
+    cmd_opts.add_option(implementation())
+    cmd_opts.add_option(abi())
+
+
+def make_target_python(options):
+    # type: (Values) -> TargetPython
+    target_python = TargetPython(
+        platform=options.platform,
+        py_version_info=options.python_version,
+        abi=options.abi,
+        implementation=options.implementation,
+    )
+
+    return target_python
+
+
+def prefer_binary():
+    # type: () -> Option
+    return Option(
+        "--prefer-binary",
+        dest="prefer_binary",
+        action="store_true",
+        default=False,
+        help="Prefer older binary packages over newer source packages."
+    )
+
+
+cache_dir = partial(
+    PipOption,
+    "--cache-dir",
+    dest="cache_dir",
+    default=USER_CACHE_DIR,
+    metavar="dir",
+    type='path',
+    help="Store the cache data in <dir>."
+)  # type: Callable[..., Option]
+
+
+def _handle_no_cache_dir(option, opt, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    """
+    Process a value provided for the --no-cache-dir option.
+
+    This is an optparse.Option callback for the --no-cache-dir option.
+    """
+    # The value argument will be None if --no-cache-dir is passed via the
+    # command-line, since the option doesn't accept arguments.  However,
+    # the value can be non-None if the option is triggered e.g. by an
+    # environment variable, like PIP_NO_CACHE_DIR=true.
+    if value is not None:
+        # Then parse the string value to get argument error-checking.
+        try:
+            strtobool(value)
+        except ValueError as exc:
+            raise_option_error(parser, option=option, msg=str(exc))
+
+    # Originally, setting PIP_NO_CACHE_DIR to a value that strtobool()
+    # converted to 0 (like "false" or "no") caused cache_dir to be disabled
+    # rather than enabled (logic would say the latter).  Thus, we disable
+    # the cache directory not just on values that parse to True, but (for
+    # backwards compatibility reasons) also on values that parse to False.
+    # In other words, always set it to False if the option is provided in
+    # some (valid) form.
+    parser.values.cache_dir = False
+
+
+no_cache = partial(
+    Option,
+    "--no-cache-dir",
+    dest="cache_dir",
+    action="callback",
+    callback=_handle_no_cache_dir,
+    help="Disable the cache.",
+)  # type: Callable[..., Option]
+
+no_deps = partial(
+    Option,
+    '--no-deps', '--no-dependencies',
+    dest='ignore_dependencies',
+    action='store_true',
+    default=False,
+    help="Don't install package dependencies.",
+)  # type: Callable[..., Option]
+
+
+def _handle_build_dir(option, opt, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    if value:
+        value = os.path.abspath(value)
+    setattr(parser.values, option.dest, value)
+
+
+build_dir = partial(
+    PipOption,
+    '-b', '--build', '--build-dir', '--build-directory',
+    dest='build_dir',
+    type='path',
+    metavar='dir',
+    action='callback',
+    callback=_handle_build_dir,
+    help='(DEPRECATED) '
+         'Directory to unpack packages into and build in. Note that '
+         'an initial build still takes place in a temporary directory. '
+         'The location of temporary directories can be controlled by setting '
+         'the TMPDIR environment variable (TEMP on Windows) appropriately. '
+         'When passed, build directories are not cleaned in case of failures.'
+)  # type: Callable[..., Option]
+
+ignore_requires_python = partial(
+    Option,
+    '--ignore-requires-python',
+    dest='ignore_requires_python',
+    action='store_true',
+    help='Ignore the Requires-Python information.'
+)  # type: Callable[..., Option]
+
+no_build_isolation = partial(
+    Option,
+    '--no-build-isolation',
+    dest='build_isolation',
+    action='store_false',
+    default=True,
+    help='Disable isolation when building a modern source distribution. '
+         'Build dependencies specified by PEP 518 must be already installed '
+         'if this option is used.'
+)  # type: Callable[..., Option]
+
+
+def _handle_no_use_pep517(option, opt, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    """
+    Process a value provided for the --no-use-pep517 option.
+
+    This is an optparse.Option callback for the no_use_pep517 option.
+    """
+    # Since --no-use-pep517 doesn't accept arguments, the value argument
+    # will be None if --no-use-pep517 is passed via the command-line.
+    # However, the value can be non-None if the option is triggered e.g.
+    # by an environment variable, for example "PIP_NO_USE_PEP517=true".
+    if value is not None:
+        msg = """A value was passed for --no-use-pep517,
+        probably using either the PIP_NO_USE_PEP517 environment variable
+        or the "no-use-pep517" config file option. Use an appropriate value
+        of the PIP_USE_PEP517 environment variable or the "use-pep517"
+        config file option instead.
+        """
+        raise_option_error(parser, option=option, msg=msg)
+
+    # Otherwise, --no-use-pep517 was passed via the command-line.
+    parser.values.use_pep517 = False
+
+
+use_pep517 = partial(
+    Option,
+    '--use-pep517',
+    dest='use_pep517',
+    action='store_true',
+    default=None,
+    help='Use PEP 517 for building source distributions '
+         '(use --no-use-pep517 to force legacy behaviour).'
+)  # type: Any
+
+no_use_pep517 = partial(
+    Option,
+    '--no-use-pep517',
+    dest='use_pep517',
+    action='callback',
+    callback=_handle_no_use_pep517,
+    default=None,
+    help=SUPPRESS_HELP
+)  # type: Any
+
+install_options = partial(
+    Option,
+    '--install-option',
+    dest='install_options',
+    action='append',
+    metavar='options',
+    help="Extra arguments to be supplied to the setup.py install "
+         "command (use like --install-option=\"--install-scripts=/usr/local/"
+         "bin\"). Use multiple --install-option options to pass multiple "
+         "options to setup.py install. If you are using an option with a "
+         "directory path, be sure to use absolute path.",
+)  # type: Callable[..., Option]
+
+global_options = partial(
+    Option,
+    '--global-option',
+    dest='global_options',
+    action='append',
+    metavar='options',
+    help="Extra global options to be supplied to the setup.py "
+         "call before the install command.",
+)  # type: Callable[..., Option]
+
+no_clean = partial(
+    Option,
+    '--no-clean',
+    action='store_true',
+    default=False,
+    help="Don't clean up build directories."
+)  # type: Callable[..., Option]
+
+pre = partial(
+    Option,
+    '--pre',
+    action='store_true',
+    default=False,
+    help="Include pre-release and development versions. By default, "
+         "pip only finds stable versions.",
+)  # type: Callable[..., Option]
+
+disable_pip_version_check = partial(
+    Option,
+    "--disable-pip-version-check",
+    dest="disable_pip_version_check",
+    action="store_true",
+    default=False,
+    help="Don't periodically check PyPI to determine whether a new version "
+         "of pip is available for download. Implied with --no-index.",
+)  # type: Callable[..., Option]
+
+
+def _handle_merge_hash(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
+    """Given a value spelled "algo:digest", append the digest to a list
+    pointed to in a dict by the algo name."""
+    if not parser.values.hashes:
+        parser.values.hashes = {}
+    try:
+        algo, digest = value.split(':', 1)
+    except ValueError:
+        parser.error('Arguments to {} must be a hash name '  # noqa
+                     'followed by a value, like --hash=sha256:'
+                     'abcde...'.format(opt_str))
+    if algo not in STRONG_HASHES:
+        parser.error('Allowed hash algorithms for {} are {}.'.format(  # noqa
+                     opt_str, ', '.join(STRONG_HASHES)))
+    parser.values.hashes.setdefault(algo, []).append(digest)
+
+
+hash = partial(
+    Option,
+    '--hash',
+    # Hash values eventually end up in InstallRequirement.hashes due to
+    # __dict__ copying in process_line().
+    dest='hashes',
+    action='callback',
+    callback=_handle_merge_hash,
+    type='string',
+    help="Verify that the package's archive matches this "
+         'hash before installing. Example: --hash=sha256:abcdef...',
+)  # type: Callable[..., Option]
+
+
+require_hashes = partial(
+    Option,
+    '--require-hashes',
+    dest='require_hashes',
+    action='store_true',
+    default=False,
+    help='Require a hash to check each requirement against, for '
+         'repeatable installs. This option is implied when any package in a '
+         'requirements file has a --hash option.',
+)  # type: Callable[..., Option]
+
+
+list_path = partial(
+    PipOption,
+    '--path',
+    dest='path',
+    type='path',
+    action='append',
+    help='Restrict to the specified installation path for listing '
+         'packages (can be used multiple times).'
+)  # type: Callable[..., Option]
+
+
+def check_list_path_option(options):
+    # type: (Values) -> None
+    if options.path and (options.user or options.local):
+        raise CommandError(
+            "Cannot combine '--path' with '--user' or '--local'"
+        )
+
+
+no_python_version_warning = partial(
+    Option,
+    '--no-python-version-warning',
+    dest='no_python_version_warning',
+    action='store_true',
+    default=False,
+    help='Silence deprecation warnings for upcoming unsupported Pythons.',
+)  # type: Callable[..., Option]
+
+
+unstable_feature = partial(
+    Option,
+    '--unstable-feature',
+    dest='unstable_features',
+    metavar='feature',
+    action='append',
+    default=[],
+    choices=['resolver'],
+    help=SUPPRESS_HELP,  # TODO: drop this in pip 20.3
+)  # type: Callable[..., Option]
+
+use_new_feature = partial(
+    Option,
+    '--use-feature',
+    dest='features_enabled',
+    metavar='feature',
+    action='append',
+    default=[],
+    choices=['2020-resolver', 'fast-deps'],
+    help='Enable new functionality, that may be backward incompatible.',
+)  # type: Callable[..., Option]
+
+use_deprecated_feature = partial(
+    Option,
+    '--use-deprecated',
+    dest='deprecated_features_enabled',
+    metavar='feature',
+    action='append',
+    default=[],
+    choices=[],
+    help=(
+        'Enable deprecated functionality, that will be removed in the future.'
+    ),
+)  # type: Callable[..., Option]
+
+
+##########
+# groups #
+##########
+
+general_group = {
+    'name': 'General Options',
+    'options': [
+        help_,
+        isolated_mode,
+        require_virtualenv,
+        verbose,
+        version,
+        quiet,
+        log,
+        no_input,
+        proxy,
+        retries,
+        timeout,
+        exists_action,
+        trusted_host,
+        cert,
+        client_cert,
+        cache_dir,
+        no_cache,
+        disable_pip_version_check,
+        no_color,
+        no_python_version_warning,
+        unstable_feature,
+        use_new_feature,
+        use_deprecated_feature,
+    ]
+}  # type: Dict[str, Any]
+
+index_group = {
+    'name': 'Package Index Options',
+    'options': [
+        index_url,
+        extra_index_url,
+        no_index,
+        find_links,
+    ]
+}  # type: Dict[str, Any]
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/command_context.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/command_context.py
new file mode 100644
index 0000000..d1a64a7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/command_context.py
@@ -0,0 +1,36 @@
+from contextlib import contextmanager
+
+from pip._vendor.contextlib2 import ExitStack
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Iterator, ContextManager, TypeVar
+
+    _T = TypeVar('_T', covariant=True)
+
+
+class CommandContextMixIn(object):
+    def __init__(self):
+        # type: () -> None
+        super(CommandContextMixIn, self).__init__()
+        self._in_main_context = False
+        self._main_context = ExitStack()
+
+    @contextmanager
+    def main_context(self):
+        # type: () -> Iterator[None]
+        assert not self._in_main_context
+
+        self._in_main_context = True
+        try:
+            with self._main_context:
+                yield
+        finally:
+            self._in_main_context = False
+
+    def enter_context(self, context_provider):
+        # type: (ContextManager[_T]) -> _T
+        assert self._in_main_context
+
+        return self._main_context.enter_context(context_provider)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/main.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/main.py
new file mode 100644
index 0000000..172f30d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/main.py
@@ -0,0 +1,75 @@
+"""Primary application entrypoint.
+"""
+from __future__ import absolute_import
+
+import locale
+import logging
+import os
+import sys
+
+from pip._internal.cli.autocompletion import autocomplete
+from pip._internal.cli.main_parser import parse_command
+from pip._internal.commands import create_command
+from pip._internal.exceptions import PipError
+from pip._internal.utils import deprecation
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional
+
+logger = logging.getLogger(__name__)
+
+
+# Do not import and use main() directly! Using it directly is actively
+# discouraged by pip's maintainers. The name, location and behavior of
+# this function is subject to change, so calling it directly is not
+# portable across different pip versions.
+
+# In addition, running pip in-process is unsupported and unsafe. This is
+# elaborated in detail at
+# https://pip.pypa.io/en/stable/user_guide/#using-pip-from-your-program.
+# That document also provides suggestions that should work for nearly
+# all users that are considering importing and using main() directly.
+
+# However, we know that certain users will still want to invoke pip
+# in-process. If you understand and accept the implications of using pip
+# in an unsupported manner, the best approach is to use runpy to avoid
+# depending on the exact location of this entry point.
+
+# The following example shows how to use runpy to invoke pip in that
+# case:
+#
+#     sys.argv = ["pip", your, args, here]
+#     runpy.run_module("pip", run_name="__main__")
+#
+# Note that this will exit the process after running, unlike a direct
+# call to main. As it is not safe to do any processing after calling
+# main, this should not be an issue in practice.
+
+def main(args=None):
+    # type: (Optional[List[str]]) -> int
+    if args is None:
+        args = sys.argv[1:]
+
+    # Configure our deprecation warnings to be sent through loggers
+    deprecation.install_warning_logger()
+
+    autocomplete()
+
+    try:
+        cmd_name, cmd_args = parse_command(args)
+    except PipError as exc:
+        sys.stderr.write("ERROR: {}".format(exc))
+        sys.stderr.write(os.linesep)
+        sys.exit(1)
+
+    # Needed for locale.getpreferredencoding(False) to work
+    # in pip._internal.utils.encoding.auto_decode
+    try:
+        locale.setlocale(locale.LC_ALL, '')
+    except locale.Error as e:
+        # setlocale can apparently crash if locale are uninitialized
+        logger.debug("Ignoring error %s when setting locale", e)
+    command = create_command(cmd_name, isolated=("--isolated" in cmd_args))
+
+    return command.main(cmd_args)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/main_parser.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/main_parser.py
new file mode 100644
index 0000000..08c82c1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/main_parser.py
@@ -0,0 +1,99 @@
+"""A single place for constructing and exposing the main parser
+"""
+
+import os
+import sys
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.parser import (
+    ConfigOptionParser,
+    UpdatingDefaultsHelpFormatter,
+)
+from pip._internal.commands import commands_dict, get_similar_commands
+from pip._internal.exceptions import CommandError
+from pip._internal.utils.misc import get_pip_version, get_prog
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Tuple, List
+
+
+__all__ = ["create_main_parser", "parse_command"]
+
+
+def create_main_parser():
+    # type: () -> ConfigOptionParser
+    """Creates and returns the main parser for pip's CLI
+    """
+
+    parser_kw = {
+        'usage': '\n%prog <command> [options]',
+        'add_help_option': False,
+        'formatter': UpdatingDefaultsHelpFormatter(),
+        'name': 'global',
+        'prog': get_prog(),
+    }
+
+    parser = ConfigOptionParser(**parser_kw)
+    parser.disable_interspersed_args()
+
+    parser.version = get_pip_version()
+
+    # add the general options
+    gen_opts = cmdoptions.make_option_group(cmdoptions.general_group, parser)
+    parser.add_option_group(gen_opts)
+
+    # so the help formatter knows
+    parser.main = True  # type: ignore
+
+    # create command listing for description
+    description = [''] + [
+        '{name:27} {command_info.summary}'.format(**locals())
+        for name, command_info in commands_dict.items()
+    ]
+    parser.description = '\n'.join(description)
+
+    return parser
+
+
+def parse_command(args):
+    # type: (List[str]) -> Tuple[str, List[str]]
+    parser = create_main_parser()
+
+    # Note: parser calls disable_interspersed_args(), so the result of this
+    # call is to split the initial args into the general options before the
+    # subcommand and everything else.
+    # For example:
+    #  args: ['--timeout=5', 'install', '--user', 'INITools']
+    #  general_options: ['--timeout==5']
+    #  args_else: ['install', '--user', 'INITools']
+    general_options, args_else = parser.parse_args(args)
+
+    # --version
+    if general_options.version:
+        sys.stdout.write(parser.version)  # type: ignore
+        sys.stdout.write(os.linesep)
+        sys.exit()
+
+    # pip || pip help -> print_help()
+    if not args_else or (args_else[0] == 'help' and len(args_else) == 1):
+        parser.print_help()
+        sys.exit()
+
+    # the subcommand name
+    cmd_name = args_else[0]
+
+    if cmd_name not in commands_dict:
+        guess = get_similar_commands(cmd_name)
+
+        msg = ['unknown command "{}"'.format(cmd_name)]
+        if guess:
+            msg.append('maybe you meant "{}"'.format(guess))
+
+        raise CommandError(' - '.join(msg))
+
+    # all the args without the subcommand
+    cmd_args = args[:]
+    cmd_args.remove(cmd_name)
+
+    return cmd_name, cmd_args
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/parser.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/parser.py
new file mode 100644
index 0000000..04e00b7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/parser.py
@@ -0,0 +1,266 @@
+"""Base option parser setup"""
+
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import logging
+import optparse
+import sys
+import textwrap
+from distutils.util import strtobool
+
+from pip._vendor.six import string_types
+
+from pip._internal.cli.status_codes import UNKNOWN_ERROR
+from pip._internal.configuration import Configuration, ConfigurationError
+from pip._internal.utils.compat import get_terminal_size
+
+logger = logging.getLogger(__name__)
+
+
+class PrettyHelpFormatter(optparse.IndentedHelpFormatter):
+    """A prettier/less verbose help formatter for optparse."""
+
+    def __init__(self, *args, **kwargs):
+        # help position must be aligned with __init__.parseopts.description
+        kwargs['max_help_position'] = 30
+        kwargs['indent_increment'] = 1
+        kwargs['width'] = get_terminal_size()[0] - 2
+        optparse.IndentedHelpFormatter.__init__(self, *args, **kwargs)
+
+    def format_option_strings(self, option):
+        return self._format_option_strings(option)
+
+    def _format_option_strings(self, option, mvarfmt=' <{}>', optsep=', '):
+        """
+        Return a comma-separated list of option strings and metavars.
+
+        :param option:  tuple of (short opt, long opt), e.g: ('-f', '--format')
+        :param mvarfmt: metavar format string
+        :param optsep:  separator
+        """
+        opts = []
+
+        if option._short_opts:
+            opts.append(option._short_opts[0])
+        if option._long_opts:
+            opts.append(option._long_opts[0])
+        if len(opts) > 1:
+            opts.insert(1, optsep)
+
+        if option.takes_value():
+            metavar = option.metavar or option.dest.lower()
+            opts.append(mvarfmt.format(metavar.lower()))
+
+        return ''.join(opts)
+
+    def format_heading(self, heading):
+        if heading == 'Options':
+            return ''
+        return heading + ':\n'
+
+    def format_usage(self, usage):
+        """
+        Ensure there is only one newline between usage and the first heading
+        if there is no description.
+        """
+        msg = '\nUsage: {}\n'.format(
+            self.indent_lines(textwrap.dedent(usage), "  "))
+        return msg
+
+    def format_description(self, description):
+        # leave full control over description to us
+        if description:
+            if hasattr(self.parser, 'main'):
+                label = 'Commands'
+            else:
+                label = 'Description'
+            # some doc strings have initial newlines, some don't
+            description = description.lstrip('\n')
+            # some doc strings have final newlines and spaces, some don't
+            description = description.rstrip()
+            # dedent, then reindent
+            description = self.indent_lines(textwrap.dedent(description), "  ")
+            description = '{}:\n{}\n'.format(label, description)
+            return description
+        else:
+            return ''
+
+    def format_epilog(self, epilog):
+        # leave full control over epilog to us
+        if epilog:
+            return epilog
+        else:
+            return ''
+
+    def indent_lines(self, text, indent):
+        new_lines = [indent + line for line in text.split('\n')]
+        return "\n".join(new_lines)
+
+
+class UpdatingDefaultsHelpFormatter(PrettyHelpFormatter):
+    """Custom help formatter for use in ConfigOptionParser.
+
+    This is updates the defaults before expanding them, allowing
+    them to show up correctly in the help listing.
+    """
+
+    def expand_default(self, option):
+        if self.parser is not None:
+            self.parser._update_defaults(self.parser.defaults)
+        return optparse.IndentedHelpFormatter.expand_default(self, option)
+
+
+class CustomOptionParser(optparse.OptionParser):
+
+    def insert_option_group(self, idx, *args, **kwargs):
+        """Insert an OptionGroup at a given position."""
+        group = self.add_option_group(*args, **kwargs)
+
+        self.option_groups.pop()
+        self.option_groups.insert(idx, group)
+
+        return group
+
+    @property
+    def option_list_all(self):
+        """Get a list of all options, including those in option groups."""
+        res = self.option_list[:]
+        for i in self.option_groups:
+            res.extend(i.option_list)
+
+        return res
+
+
+class ConfigOptionParser(CustomOptionParser):
+    """Custom option parser which updates its defaults by checking the
+    configuration files and environmental variables"""
+
+    def __init__(self, *args, **kwargs):
+        self.name = kwargs.pop('name')
+
+        isolated = kwargs.pop("isolated", False)
+        self.config = Configuration(isolated)
+
+        assert self.name
+        optparse.OptionParser.__init__(self, *args, **kwargs)
+
+    def check_default(self, option, key, val):
+        try:
+            return option.check_value(key, val)
+        except optparse.OptionValueError as exc:
+            print("An error occurred during configuration: {}".format(exc))
+            sys.exit(3)
+
+    def _get_ordered_configuration_items(self):
+        # Configuration gives keys in an unordered manner. Order them.
+        override_order = ["global", self.name, ":env:"]
+
+        # Pool the options into different groups
+        section_items = {name: [] for name in override_order}
+        for section_key, val in self.config.items():
+            # ignore empty values
+            if not val:
+                logger.debug(
+                    "Ignoring configuration key '%s' as it's value is empty.",
+                    section_key
+                )
+                continue
+
+            section, key = section_key.split(".", 1)
+            if section in override_order:
+                section_items[section].append((key, val))
+
+        # Yield each group in their override order
+        for section in override_order:
+            for key, val in section_items[section]:
+                yield key, val
+
+    def _update_defaults(self, defaults):
+        """Updates the given defaults with values from the config files and
+        the environ. Does a little special handling for certain types of
+        options (lists)."""
+
+        # Accumulate complex default state.
+        self.values = optparse.Values(self.defaults)
+        late_eval = set()
+        # Then set the options with those values
+        for key, val in self._get_ordered_configuration_items():
+            # '--' because configuration supports only long names
+            option = self.get_option('--' + key)
+
+            # Ignore options not present in this parser. E.g. non-globals put
+            # in [global] by users that want them to apply to all applicable
+            # commands.
+            if option is None:
+                continue
+
+            if option.action in ('store_true', 'store_false', 'count'):
+                try:
+                    val = strtobool(val)
+                except ValueError:
+                    error_msg = invalid_config_error_message(
+                        option.action, key, val
+                    )
+                    self.error(error_msg)
+
+            elif option.action == 'append':
+                val = val.split()
+                val = [self.check_default(option, key, v) for v in val]
+            elif option.action == 'callback':
+                late_eval.add(option.dest)
+                opt_str = option.get_opt_string()
+                val = option.convert_value(opt_str, val)
+                # From take_action
+                args = option.callback_args or ()
+                kwargs = option.callback_kwargs or {}
+                option.callback(option, opt_str, val, self, *args, **kwargs)
+            else:
+                val = self.check_default(option, key, val)
+
+            defaults[option.dest] = val
+
+        for key in late_eval:
+            defaults[key] = getattr(self.values, key)
+        self.values = None
+        return defaults
+
+    def get_default_values(self):
+        """Overriding to make updating the defaults after instantiation of
+        the option parser possible, _update_defaults() does the dirty work."""
+        if not self.process_default_values:
+            # Old, pre-Optik 1.5 behaviour.
+            return optparse.Values(self.defaults)
+
+        # Load the configuration, or error out in case of an error
+        try:
+            self.config.load()
+        except ConfigurationError as err:
+            self.exit(UNKNOWN_ERROR, str(err))
+
+        defaults = self._update_defaults(self.defaults.copy())  # ours
+        for option in self._get_all_options():
+            default = defaults.get(option.dest)
+            if isinstance(default, string_types):
+                opt_str = option.get_opt_string()
+                defaults[option.dest] = option.check_value(opt_str, default)
+        return optparse.Values(defaults)
+
+    def error(self, msg):
+        self.print_usage(sys.stderr)
+        self.exit(UNKNOWN_ERROR, "{}\n".format(msg))
+
+
+def invalid_config_error_message(action, key, val):
+    """Returns a better error message when invalid configuration option
+    is provided."""
+    if action in ('store_true', 'store_false'):
+        return ("{0} is not a valid value for {1} option, "
+                "please specify a boolean value like yes/no, "
+                "true/false or 1/0 instead.").format(val, key)
+
+    return ("{0} is not a valid value for {1} option, "
+            "please specify a numerical value like 1/0 "
+            "instead.").format(val, key)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/progress_bars.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/progress_bars.py
new file mode 100644
index 0000000..6933855
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/progress_bars.py
@@ -0,0 +1,280 @@
+from __future__ import division
+
+import itertools
+import sys
+from signal import SIGINT, default_int_handler, signal
+
+from pip._vendor import six
+from pip._vendor.progress.bar import Bar, FillingCirclesBar, IncrementalBar
+from pip._vendor.progress.spinner import Spinner
+
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.logging import get_indentation
+from pip._internal.utils.misc import format_size
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Dict, List
+
+try:
+    from pip._vendor import colorama
+# Lots of different errors can come from this, including SystemError and
+# ImportError.
+except Exception:
+    colorama = None
+
+
+def _select_progress_class(preferred, fallback):
+    # type: (Bar, Bar) -> Bar
+    encoding = getattr(preferred.file, "encoding", None)
+
+    # If we don't know what encoding this file is in, then we'll just assume
+    # that it doesn't support unicode and use the ASCII bar.
+    if not encoding:
+        return fallback
+
+    # Collect all of the possible characters we want to use with the preferred
+    # bar.
+    characters = [
+        getattr(preferred, "empty_fill", six.text_type()),
+        getattr(preferred, "fill", six.text_type()),
+    ]
+    characters += list(getattr(preferred, "phases", []))
+
+    # Try to decode the characters we're using for the bar using the encoding
+    # of the given file, if this works then we'll assume that we can use the
+    # fancier bar and if not we'll fall back to the plaintext bar.
+    try:
+        six.text_type().join(characters).encode(encoding)
+    except UnicodeEncodeError:
+        return fallback
+    else:
+        return preferred
+
+
+_BaseBar = _select_progress_class(IncrementalBar, Bar)  # type: Any
+
+
+class InterruptibleMixin(object):
+    """
+    Helper to ensure that self.finish() gets called on keyboard interrupt.
+
+    This allows downloads to be interrupted without leaving temporary state
+    (like hidden cursors) behind.
+
+    This class is similar to the progress library's existing SigIntMixin
+    helper, but as of version 1.2, that helper has the following problems:
+
+    1. It calls sys.exit().
+    2. It discards the existing SIGINT handler completely.
+    3. It leaves its own handler in place even after an uninterrupted finish,
+       which will have unexpected delayed effects if the user triggers an
+       unrelated keyboard interrupt some time after a progress-displaying
+       download has already completed, for example.
+    """
+
+    def __init__(self, *args, **kwargs):
+        # type: (List[Any], Dict[Any, Any]) -> None
+        """
+        Save the original SIGINT handler for later.
+        """
+        # https://github.com/python/mypy/issues/5887
+        super(InterruptibleMixin, self).__init__(  # type: ignore
+            *args,
+            **kwargs
+        )
+
+        self.original_handler = signal(SIGINT, self.handle_sigint)
+
+        # If signal() returns None, the previous handler was not installed from
+        # Python, and we cannot restore it. This probably should not happen,
+        # but if it does, we must restore something sensible instead, at least.
+        # The least bad option should be Python's default SIGINT handler, which
+        # just raises KeyboardInterrupt.
+        if self.original_handler is None:
+            self.original_handler = default_int_handler
+
+    def finish(self):
+        # type: () -> None
+        """
+        Restore the original SIGINT handler after finishing.
+
+        This should happen regardless of whether the progress display finishes
+        normally, or gets interrupted.
+        """
+        super(InterruptibleMixin, self).finish()  # type: ignore
+        signal(SIGINT, self.original_handler)
+
+    def handle_sigint(self, signum, frame):  # type: ignore
+        """
+        Call self.finish() before delegating to the original SIGINT handler.
+
+        This handler should only be in place while the progress display is
+        active.
+        """
+        self.finish()
+        self.original_handler(signum, frame)
+
+
+class SilentBar(Bar):
+
+    def update(self):
+        # type: () -> None
+        pass
+
+
+class BlueEmojiBar(IncrementalBar):
+
+    suffix = "%(percent)d%%"
+    bar_prefix = " "
+    bar_suffix = " "
+    phases = (u"\U0001F539", u"\U0001F537", u"\U0001F535")  # type: Any
+
+
+class DownloadProgressMixin(object):
+
+    def __init__(self, *args, **kwargs):
+        # type: (List[Any], Dict[Any, Any]) -> None
+        # https://github.com/python/mypy/issues/5887
+        super(DownloadProgressMixin, self).__init__(  # type: ignore
+            *args,
+            **kwargs
+        )
+        self.message = (" " * (
+            get_indentation() + 2
+        )) + self.message  # type: str
+
+    @property
+    def downloaded(self):
+        # type: () -> str
+        return format_size(self.index)  # type: ignore
+
+    @property
+    def download_speed(self):
+        # type: () -> str
+        # Avoid zero division errors...
+        if self.avg == 0.0:  # type: ignore
+            return "..."
+        return format_size(1 / self.avg) + "/s"  # type: ignore
+
+    @property
+    def pretty_eta(self):
+        # type: () -> str
+        if self.eta:  # type: ignore
+            return "eta {}".format(self.eta_td)  # type: ignore
+        return ""
+
+    def iter(self, it):  # type: ignore
+        for x in it:
+            yield x
+            # B305 is incorrectly raised here
+            # https://github.com/PyCQA/flake8-bugbear/issues/59
+            self.next(len(x))  # noqa: B305
+        self.finish()
+
+
+class WindowsMixin(object):
+
+    def __init__(self, *args, **kwargs):
+        # type: (List[Any], Dict[Any, Any]) -> None
+        # The Windows terminal does not support the hide/show cursor ANSI codes
+        # even with colorama. So we'll ensure that hide_cursor is False on
+        # Windows.
+        # This call needs to go before the super() call, so that hide_cursor
+        # is set in time. The base progress bar class writes the "hide cursor"
+        # code to the terminal in its init, so if we don't set this soon
+        # enough, we get a "hide" with no corresponding "show"...
+        if WINDOWS and self.hide_cursor:  # type: ignore
+            self.hide_cursor = False
+
+        # https://github.com/python/mypy/issues/5887
+        super(WindowsMixin, self).__init__(*args, **kwargs)  # type: ignore
+
+        # Check if we are running on Windows and we have the colorama module,
+        # if we do then wrap our file with it.
+        if WINDOWS and colorama:
+            self.file = colorama.AnsiToWin32(self.file)  # type: ignore
+            # The progress code expects to be able to call self.file.isatty()
+            # but the colorama.AnsiToWin32() object doesn't have that, so we'll
+            # add it.
+            self.file.isatty = lambda: self.file.wrapped.isatty()
+            # The progress code expects to be able to call self.file.flush()
+            # but the colorama.AnsiToWin32() object doesn't have that, so we'll
+            # add it.
+            self.file.flush = lambda: self.file.wrapped.flush()
+
+
+class BaseDownloadProgressBar(WindowsMixin, InterruptibleMixin,
+                              DownloadProgressMixin):
+
+    file = sys.stdout
+    message = "%(percent)d%%"
+    suffix = "%(downloaded)s %(download_speed)s %(pretty_eta)s"
+
+
+class DefaultDownloadProgressBar(BaseDownloadProgressBar,
+                                 _BaseBar):
+    pass
+
+
+class DownloadSilentBar(BaseDownloadProgressBar, SilentBar):
+    pass
+
+
+class DownloadBar(BaseDownloadProgressBar,
+                  Bar):
+    pass
+
+
+class DownloadFillingCirclesBar(BaseDownloadProgressBar,
+                                FillingCirclesBar):
+    pass
+
+
+class DownloadBlueEmojiProgressBar(BaseDownloadProgressBar,
+                                   BlueEmojiBar):
+    pass
+
+
+class DownloadProgressSpinner(WindowsMixin, InterruptibleMixin,
+                              DownloadProgressMixin, Spinner):
+
+    file = sys.stdout
+    suffix = "%(downloaded)s %(download_speed)s"
+
+    def next_phase(self):
+        # type: () -> str
+        if not hasattr(self, "_phaser"):
+            self._phaser = itertools.cycle(self.phases)
+        return next(self._phaser)
+
+    def update(self):
+        # type: () -> None
+        message = self.message % self
+        phase = self.next_phase()
+        suffix = self.suffix % self
+        line = ''.join([
+            message,
+            " " if message else "",
+            phase,
+            " " if suffix else "",
+            suffix,
+        ])
+
+        self.writeln(line)
+
+
+BAR_TYPES = {
+    "off": (DownloadSilentBar, DownloadSilentBar),
+    "on": (DefaultDownloadProgressBar, DownloadProgressSpinner),
+    "ascii": (DownloadBar, DownloadProgressSpinner),
+    "pretty": (DownloadFillingCirclesBar, DownloadProgressSpinner),
+    "emoji": (DownloadBlueEmojiProgressBar, DownloadProgressSpinner)
+}
+
+
+def DownloadProgressProvider(progress_bar, max=None):  # type: ignore
+    if max is None or max == 0:
+        return BAR_TYPES[progress_bar][1]().iter
+    else:
+        return BAR_TYPES[progress_bar][0](max=max).iter
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/req_command.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/req_command.py
new file mode 100644
index 0000000..78b5ce6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/req_command.py
@@ -0,0 +1,402 @@
+"""Contains the Command base classes that depend on PipSession.
+
+The classes in this module are in a separate module so the commands not
+needing download / PackageFinder capability don't unnecessarily import the
+PackageFinder machinery and all its vendored dependencies, etc.
+"""
+
+import logging
+import os
+from functools import partial
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.command_context import CommandContextMixIn
+from pip._internal.exceptions import CommandError, PreviousBuildDirError
+from pip._internal.index.collector import LinkCollector
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.network.download import Downloader
+from pip._internal.network.session import PipSession
+from pip._internal.operations.prepare import RequirementPreparer
+from pip._internal.req.constructors import (
+    install_req_from_editable,
+    install_req_from_line,
+    install_req_from_parsed_requirement,
+    install_req_from_req_string,
+)
+from pip._internal.req.req_file import parse_requirements
+from pip._internal.self_outdated_check import pip_self_version_check
+from pip._internal.utils.temp_dir import tempdir_kinds
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import Any, List, Optional, Tuple
+
+    from pip._internal.cache import WheelCache
+    from pip._internal.models.target_python import TargetPython
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.req.req_tracker import RequirementTracker
+    from pip._internal.resolution.base import BaseResolver
+    from pip._internal.utils.temp_dir import (
+        TempDirectory,
+        TempDirectoryTypeRegistry,
+    )
+
+
+logger = logging.getLogger(__name__)
+
+
+class SessionCommandMixin(CommandContextMixIn):
+
+    """
+    A class mixin for command classes needing _build_session().
+    """
+    def __init__(self):
+        # type: () -> None
+        super(SessionCommandMixin, self).__init__()
+        self._session = None  # Optional[PipSession]
+
+    @classmethod
+    def _get_index_urls(cls, options):
+        # type: (Values) -> Optional[List[str]]
+        """Return a list of index urls from user-provided options."""
+        index_urls = []
+        if not getattr(options, "no_index", False):
+            url = getattr(options, "index_url", None)
+            if url:
+                index_urls.append(url)
+        urls = getattr(options, "extra_index_urls", None)
+        if urls:
+            index_urls.extend(urls)
+        # Return None rather than an empty list
+        return index_urls or None
+
+    def get_default_session(self, options):
+        # type: (Values) -> PipSession
+        """Get a default-managed session."""
+        if self._session is None:
+            self._session = self.enter_context(self._build_session(options))
+            # there's no type annotation on requests.Session, so it's
+            # automatically ContextManager[Any] and self._session becomes Any,
+            # then https://github.com/python/mypy/issues/7696 kicks in
+            assert self._session is not None
+        return self._session
+
+    def _build_session(self, options, retries=None, timeout=None):
+        # type: (Values, Optional[int], Optional[int]) -> PipSession
+        assert not options.cache_dir or os.path.isabs(options.cache_dir)
+        session = PipSession(
+            cache=(
+                os.path.join(options.cache_dir, "http")
+                if options.cache_dir else None
+            ),
+            retries=retries if retries is not None else options.retries,
+            trusted_hosts=options.trusted_hosts,
+            index_urls=self._get_index_urls(options),
+        )
+
+        # Handle custom ca-bundles from the user
+        if options.cert:
+            session.verify = options.cert
+
+        # Handle SSL client certificate
+        if options.client_cert:
+            session.cert = options.client_cert
+
+        # Handle timeouts
+        if options.timeout or timeout:
+            session.timeout = (
+                timeout if timeout is not None else options.timeout
+            )
+
+        # Handle configured proxies
+        if options.proxy:
+            session.proxies = {
+                "http": options.proxy,
+                "https": options.proxy,
+            }
+
+        # Determine if we can prompt the user for authentication or not
+        session.auth.prompting = not options.no_input
+
+        return session
+
+
+class IndexGroupCommand(Command, SessionCommandMixin):
+
+    """
+    Abstract base class for commands with the index_group options.
+
+    This also corresponds to the commands that permit the pip version check.
+    """
+
+    def handle_pip_version_check(self, options):
+        # type: (Values) -> None
+        """
+        Do the pip version check if not disabled.
+
+        This overrides the default behavior of not doing the check.
+        """
+        # Make sure the index_group options are present.
+        assert hasattr(options, 'no_index')
+
+        if options.disable_pip_version_check or options.no_index:
+            return
+
+        # Otherwise, check if we're using the latest version of pip available.
+        session = self._build_session(
+            options,
+            retries=0,
+            timeout=min(5, options.timeout)
+        )
+        with session:
+            pip_self_version_check(session, options)
+
+
+KEEPABLE_TEMPDIR_TYPES = [
+    tempdir_kinds.BUILD_ENV,
+    tempdir_kinds.EPHEM_WHEEL_CACHE,
+    tempdir_kinds.REQ_BUILD,
+]
+
+
+def with_cleanup(func):
+    # type: (Any) -> Any
+    """Decorator for common logic related to managing temporary
+    directories.
+    """
+    def configure_tempdir_registry(registry):
+        # type: (TempDirectoryTypeRegistry) -> None
+        for t in KEEPABLE_TEMPDIR_TYPES:
+            registry.set_delete(t, False)
+
+    def wrapper(self, options, args):
+        # type: (RequirementCommand, Values, List[Any]) -> Optional[int]
+        assert self.tempdir_registry is not None
+        if options.no_clean:
+            configure_tempdir_registry(self.tempdir_registry)
+
+        try:
+            return func(self, options, args)
+        except PreviousBuildDirError:
+            # This kind of conflict can occur when the user passes an explicit
+            # build directory with a pre-existing folder. In that case we do
+            # not want to accidentally remove it.
+            configure_tempdir_registry(self.tempdir_registry)
+            raise
+
+    return wrapper
+
+
+class RequirementCommand(IndexGroupCommand):
+
+    def __init__(self, *args, **kw):
+        # type: (Any, Any) -> None
+        super(RequirementCommand, self).__init__(*args, **kw)
+
+        self.cmd_opts.add_option(cmdoptions.no_clean())
+
+    @staticmethod
+    def make_requirement_preparer(
+        temp_build_dir,           # type: TempDirectory
+        options,                  # type: Values
+        req_tracker,              # type: RequirementTracker
+        session,                  # type: PipSession
+        finder,                   # type: PackageFinder
+        use_user_site,            # type: bool
+        download_dir=None,        # type: str
+        wheel_download_dir=None,  # type: str
+    ):
+        # type: (...) -> RequirementPreparer
+        """
+        Create a RequirementPreparer instance for the given parameters.
+        """
+        downloader = Downloader(session, progress_bar=options.progress_bar)
+
+        temp_build_dir_path = temp_build_dir.path
+        assert temp_build_dir_path is not None
+
+        return RequirementPreparer(
+            build_dir=temp_build_dir_path,
+            src_dir=options.src_dir,
+            download_dir=download_dir,
+            wheel_download_dir=wheel_download_dir,
+            build_isolation=options.build_isolation,
+            req_tracker=req_tracker,
+            downloader=downloader,
+            finder=finder,
+            require_hashes=options.require_hashes,
+            use_user_site=use_user_site,
+        )
+
+    @staticmethod
+    def make_resolver(
+        preparer,                            # type: RequirementPreparer
+        finder,                              # type: PackageFinder
+        options,                             # type: Values
+        wheel_cache=None,                    # type: Optional[WheelCache]
+        use_user_site=False,                 # type: bool
+        ignore_installed=True,               # type: bool
+        ignore_requires_python=False,        # type: bool
+        force_reinstall=False,               # type: bool
+        upgrade_strategy="to-satisfy-only",  # type: str
+        use_pep517=None,                     # type: Optional[bool]
+        py_version_info=None            # type: Optional[Tuple[int, ...]]
+    ):
+        # type: (...) -> BaseResolver
+        """
+        Create a Resolver instance for the given parameters.
+        """
+        make_install_req = partial(
+            install_req_from_req_string,
+            isolated=options.isolated_mode,
+            use_pep517=use_pep517,
+        )
+        # The long import name and duplicated invocation is needed to convince
+        # Mypy into correctly typechecking. Otherwise it would complain the
+        # "Resolver" class being redefined.
+        if '2020-resolver' in options.features_enabled:
+            import pip._internal.resolution.resolvelib.resolver
+            return pip._internal.resolution.resolvelib.resolver.Resolver(
+                preparer=preparer,
+                finder=finder,
+                wheel_cache=wheel_cache,
+                make_install_req=make_install_req,
+                use_user_site=use_user_site,
+                ignore_dependencies=options.ignore_dependencies,
+                ignore_installed=ignore_installed,
+                ignore_requires_python=ignore_requires_python,
+                force_reinstall=force_reinstall,
+                upgrade_strategy=upgrade_strategy,
+                py_version_info=py_version_info,
+                lazy_wheel='fast-deps' in options.features_enabled,
+            )
+        import pip._internal.resolution.legacy.resolver
+        return pip._internal.resolution.legacy.resolver.Resolver(
+            preparer=preparer,
+            finder=finder,
+            wheel_cache=wheel_cache,
+            make_install_req=make_install_req,
+            use_user_site=use_user_site,
+            ignore_dependencies=options.ignore_dependencies,
+            ignore_installed=ignore_installed,
+            ignore_requires_python=ignore_requires_python,
+            force_reinstall=force_reinstall,
+            upgrade_strategy=upgrade_strategy,
+            py_version_info=py_version_info,
+        )
+
+    def get_requirements(
+        self,
+        args,             # type: List[str]
+        options,          # type: Values
+        finder,           # type: PackageFinder
+        session,          # type: PipSession
+    ):
+        # type: (...) -> List[InstallRequirement]
+        """
+        Parse command-line arguments into the corresponding requirements.
+        """
+        requirements = []  # type: List[InstallRequirement]
+        for filename in options.constraints:
+            for parsed_req in parse_requirements(
+                    filename,
+                    constraint=True, finder=finder, options=options,
+                    session=session):
+                req_to_add = install_req_from_parsed_requirement(
+                    parsed_req,
+                    isolated=options.isolated_mode,
+                    user_supplied=False,
+                )
+                requirements.append(req_to_add)
+
+        for req in args:
+            req_to_add = install_req_from_line(
+                req, None, isolated=options.isolated_mode,
+                use_pep517=options.use_pep517,
+                user_supplied=True,
+            )
+            requirements.append(req_to_add)
+
+        for req in options.editables:
+            req_to_add = install_req_from_editable(
+                req,
+                user_supplied=True,
+                isolated=options.isolated_mode,
+                use_pep517=options.use_pep517,
+            )
+            requirements.append(req_to_add)
+
+        # NOTE: options.require_hashes may be set if --require-hashes is True
+        for filename in options.requirements:
+            for parsed_req in parse_requirements(
+                    filename,
+                    finder=finder, options=options, session=session):
+                req_to_add = install_req_from_parsed_requirement(
+                    parsed_req,
+                    isolated=options.isolated_mode,
+                    use_pep517=options.use_pep517,
+                    user_supplied=True,
+                )
+                requirements.append(req_to_add)
+
+        # If any requirement has hash options, enable hash checking.
+        if any(req.has_hash_options for req in requirements):
+            options.require_hashes = True
+
+        if not (args or options.editables or options.requirements):
+            opts = {'name': self.name}
+            if options.find_links:
+                raise CommandError(
+                    'You must give at least one requirement to {name} '
+                    '(maybe you meant "pip {name} {links}"?)'.format(
+                        **dict(opts, links=' '.join(options.find_links))))
+            else:
+                raise CommandError(
+                    'You must give at least one requirement to {name} '
+                    '(see "pip help {name}")'.format(**opts))
+
+        return requirements
+
+    @staticmethod
+    def trace_basic_info(finder):
+        # type: (PackageFinder) -> None
+        """
+        Trace basic information about the provided objects.
+        """
+        # Display where finder is looking for packages
+        search_scope = finder.search_scope
+        locations = search_scope.get_formatted_locations()
+        if locations:
+            logger.info(locations)
+
+    def _build_package_finder(
+        self,
+        options,               # type: Values
+        session,               # type: PipSession
+        target_python=None,    # type: Optional[TargetPython]
+        ignore_requires_python=None,  # type: Optional[bool]
+    ):
+        # type: (...) -> PackageFinder
+        """
+        Create a package finder appropriate to this requirement command.
+
+        :param ignore_requires_python: Whether to ignore incompatible
+            "Requires-Python" values in links. Defaults to False.
+        """
+        link_collector = LinkCollector.create(session, options=options)
+        selection_prefs = SelectionPreferences(
+            allow_yanked=True,
+            format_control=options.format_control,
+            allow_all_prereleases=options.pre,
+            prefer_binary=options.prefer_binary,
+            ignore_requires_python=ignore_requires_python,
+        )
+
+        return PackageFinder.create(
+            link_collector=link_collector,
+            selection_prefs=selection_prefs,
+            target_python=target_python,
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/spinners.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/spinners.py
new file mode 100644
index 0000000..c6c4c5c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/spinners.py
@@ -0,0 +1,173 @@
+from __future__ import absolute_import, division
+
+import contextlib
+import itertools
+import logging
+import sys
+import time
+
+from pip._vendor.progress import HIDE_CURSOR, SHOW_CURSOR
+
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.logging import get_indentation
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Iterator, IO
+
+logger = logging.getLogger(__name__)
+
+
+class SpinnerInterface(object):
+    def spin(self):
+        # type: () -> None
+        raise NotImplementedError()
+
+    def finish(self, final_status):
+        # type: (str) -> None
+        raise NotImplementedError()
+
+
+class InteractiveSpinner(SpinnerInterface):
+    def __init__(self, message, file=None, spin_chars="-\\|/",
+                 # Empirically, 8 updates/second looks nice
+                 min_update_interval_seconds=0.125):
+        # type: (str, IO[str], str, float) -> None
+        self._message = message
+        if file is None:
+            file = sys.stdout
+        self._file = file
+        self._rate_limiter = RateLimiter(min_update_interval_seconds)
+        self._finished = False
+
+        self._spin_cycle = itertools.cycle(spin_chars)
+
+        self._file.write(" " * get_indentation() + self._message + " ... ")
+        self._width = 0
+
+    def _write(self, status):
+        # type: (str) -> None
+        assert not self._finished
+        # Erase what we wrote before by backspacing to the beginning, writing
+        # spaces to overwrite the old text, and then backspacing again
+        backup = "\b" * self._width
+        self._file.write(backup + " " * self._width + backup)
+        # Now we have a blank slate to add our status
+        self._file.write(status)
+        self._width = len(status)
+        self._file.flush()
+        self._rate_limiter.reset()
+
+    def spin(self):
+        # type: () -> None
+        if self._finished:
+            return
+        if not self._rate_limiter.ready():
+            return
+        self._write(next(self._spin_cycle))
+
+    def finish(self, final_status):
+        # type: (str) -> None
+        if self._finished:
+            return
+        self._write(final_status)
+        self._file.write("\n")
+        self._file.flush()
+        self._finished = True
+
+
+# Used for dumb terminals, non-interactive installs (no tty), etc.
+# We still print updates occasionally (once every 60 seconds by default) to
+# act as a keep-alive for systems like Travis-CI that take lack-of-output as
+# an indication that a task has frozen.
+class NonInteractiveSpinner(SpinnerInterface):
+    def __init__(self, message, min_update_interval_seconds=60):
+        # type: (str, float) -> None
+        self._message = message
+        self._finished = False
+        self._rate_limiter = RateLimiter(min_update_interval_seconds)
+        self._update("started")
+
+    def _update(self, status):
+        # type: (str) -> None
+        assert not self._finished
+        self._rate_limiter.reset()
+        logger.info("%s: %s", self._message, status)
+
+    def spin(self):
+        # type: () -> None
+        if self._finished:
+            return
+        if not self._rate_limiter.ready():
+            return
+        self._update("still running...")
+
+    def finish(self, final_status):
+        # type: (str) -> None
+        if self._finished:
+            return
+        self._update(
+            "finished with status '{final_status}'".format(**locals()))
+        self._finished = True
+
+
+class RateLimiter(object):
+    def __init__(self, min_update_interval_seconds):
+        # type: (float) -> None
+        self._min_update_interval_seconds = min_update_interval_seconds
+        self._last_update = 0  # type: float
+
+    def ready(self):
+        # type: () -> bool
+        now = time.time()
+        delta = now - self._last_update
+        return delta >= self._min_update_interval_seconds
+
+    def reset(self):
+        # type: () -> None
+        self._last_update = time.time()
+
+
+@contextlib.contextmanager
+def open_spinner(message):
+    # type: (str) -> Iterator[SpinnerInterface]
+    # Interactive spinner goes directly to sys.stdout rather than being routed
+    # through the logging system, but it acts like it has level INFO,
+    # i.e. it's only displayed if we're at level INFO or better.
+    # Non-interactive spinner goes through the logging system, so it is always
+    # in sync with logging configuration.
+    if sys.stdout.isatty() and logger.getEffectiveLevel() <= logging.INFO:
+        spinner = InteractiveSpinner(message)  # type: SpinnerInterface
+    else:
+        spinner = NonInteractiveSpinner(message)
+    try:
+        with hidden_cursor(sys.stdout):
+            yield spinner
+    except KeyboardInterrupt:
+        spinner.finish("canceled")
+        raise
+    except Exception:
+        spinner.finish("error")
+        raise
+    else:
+        spinner.finish("done")
+
+
+@contextlib.contextmanager
+def hidden_cursor(file):
+    # type: (IO[str]) -> Iterator[None]
+    # The Windows terminal does not support the hide/show cursor ANSI codes,
+    # even via colorama. So don't even try.
+    if WINDOWS:
+        yield
+    # We don't want to clutter the output with control characters if we're
+    # writing to a file, or if the user is running with --quiet.
+    # See https://github.com/pypa/pip/issues/3418
+    elif not file.isatty() or logger.getEffectiveLevel() > logging.INFO:
+        yield
+    else:
+        file.write(HIDE_CURSOR)
+        try:
+            yield
+        finally:
+            file.write(SHOW_CURSOR)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/status_codes.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/status_codes.py
new file mode 100644
index 0000000..275360a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/cli/status_codes.py
@@ -0,0 +1,8 @@
+from __future__ import absolute_import
+
+SUCCESS = 0
+ERROR = 1
+UNKNOWN_ERROR = 2
+VIRTUALENV_NOT_FOUND = 3
+PREVIOUS_BUILD_DIR_ERROR = 4
+NO_MATCHES_FOUND = 23
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/__init__.py
new file mode 100644
index 0000000..6825fa6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/__init__.py
@@ -0,0 +1,122 @@
+"""
+Package containing all pip commands
+"""
+
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+# There is currently a bug in python/typeshed mentioned at
+# https://github.com/python/typeshed/issues/3906 which causes the
+# return type of difflib.get_close_matches to be reported
+# as List[Sequence[str]] whereas it should have been List[str]
+
+from __future__ import absolute_import
+
+import importlib
+from collections import OrderedDict, namedtuple
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any
+    from pip._internal.cli.base_command import Command
+
+
+CommandInfo = namedtuple('CommandInfo', 'module_path, class_name, summary')
+
+# The ordering matters for help display.
+#    Also, even though the module path starts with the same
+# "pip._internal.commands" prefix in each case, we include the full path
+# because it makes testing easier (specifically when modifying commands_dict
+# in test setup / teardown by adding info for a FakeCommand class defined
+# in a test-related module).
+#    Finally, we need to pass an iterable of pairs here rather than a dict
+# so that the ordering won't be lost when using Python 2.7.
+commands_dict = OrderedDict([
+    ('install', CommandInfo(
+        'pip._internal.commands.install', 'InstallCommand',
+        'Install packages.',
+    )),
+    ('download', CommandInfo(
+        'pip._internal.commands.download', 'DownloadCommand',
+        'Download packages.',
+    )),
+    ('uninstall', CommandInfo(
+        'pip._internal.commands.uninstall', 'UninstallCommand',
+        'Uninstall packages.',
+    )),
+    ('freeze', CommandInfo(
+        'pip._internal.commands.freeze', 'FreezeCommand',
+        'Output installed packages in requirements format.',
+    )),
+    ('list', CommandInfo(
+        'pip._internal.commands.list', 'ListCommand',
+        'List installed packages.',
+    )),
+    ('show', CommandInfo(
+        'pip._internal.commands.show', 'ShowCommand',
+        'Show information about installed packages.',
+    )),
+    ('check', CommandInfo(
+        'pip._internal.commands.check', 'CheckCommand',
+        'Verify installed packages have compatible dependencies.',
+    )),
+    ('config', CommandInfo(
+        'pip._internal.commands.configuration', 'ConfigurationCommand',
+        'Manage local and global configuration.',
+    )),
+    ('search', CommandInfo(
+        'pip._internal.commands.search', 'SearchCommand',
+        'Search PyPI for packages.',
+    )),
+    ('cache', CommandInfo(
+        'pip._internal.commands.cache', 'CacheCommand',
+        "Inspect and manage pip's wheel cache.",
+    )),
+    ('wheel', CommandInfo(
+        'pip._internal.commands.wheel', 'WheelCommand',
+        'Build wheels from your requirements.',
+    )),
+    ('hash', CommandInfo(
+        'pip._internal.commands.hash', 'HashCommand',
+        'Compute hashes of package archives.',
+    )),
+    ('completion', CommandInfo(
+        'pip._internal.commands.completion', 'CompletionCommand',
+        'A helper command used for command completion.',
+    )),
+    ('debug', CommandInfo(
+        'pip._internal.commands.debug', 'DebugCommand',
+        'Show information useful for debugging.',
+    )),
+    ('help', CommandInfo(
+        'pip._internal.commands.help', 'HelpCommand',
+        'Show help for commands.',
+    )),
+])  # type: OrderedDict[str, CommandInfo]
+
+
+def create_command(name, **kwargs):
+    # type: (str, **Any) -> Command
+    """
+    Create an instance of the Command class with the given name.
+    """
+    module_path, class_name, summary = commands_dict[name]
+    module = importlib.import_module(module_path)
+    command_class = getattr(module, class_name)
+    command = command_class(name=name, summary=summary, **kwargs)
+
+    return command
+
+
+def get_similar_commands(name):
+    """Command name auto-correct."""
+    from difflib import get_close_matches
+
+    name = name.lower()
+
+    close_commands = get_close_matches(name, commands_dict.keys())
+
+    if close_commands:
+        return close_commands[0]
+    else:
+        return False
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/cache.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/cache.py
new file mode 100644
index 0000000..747277f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/cache.py
@@ -0,0 +1,182 @@
+from __future__ import absolute_import
+
+import logging
+import os
+import textwrap
+
+import pip._internal.utils.filesystem as filesystem
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.exceptions import CommandError, PipError
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import Any, List
+
+
+logger = logging.getLogger(__name__)
+
+
+class CacheCommand(Command):
+    """
+    Inspect and manage pip's wheel cache.
+
+    Subcommands:
+
+    - dir: Show the cache directory.
+    - info: Show information about the cache.
+    - list: List filenames of packages stored in the cache.
+    - remove: Remove one or more package from the cache.
+    - purge: Remove all items from the cache.
+
+    ``<pattern>`` can be a glob expression or a package name.
+    """
+
+    ignore_require_venv = True
+    usage = """
+        %prog dir
+        %prog info
+        %prog list [<pattern>]
+        %prog remove <pattern>
+        %prog purge
+    """
+
+    def run(self, options, args):
+        # type: (Values, List[Any]) -> int
+        handlers = {
+            "dir": self.get_cache_dir,
+            "info": self.get_cache_info,
+            "list": self.list_cache_items,
+            "remove": self.remove_cache_items,
+            "purge": self.purge_cache,
+        }
+
+        if not options.cache_dir:
+            logger.error("pip cache commands can not "
+                         "function since cache is disabled.")
+            return ERROR
+
+        # Determine action
+        if not args or args[0] not in handlers:
+            logger.error(
+                "Need an action (%s) to perform.",
+                ", ".join(sorted(handlers)),
+            )
+            return ERROR
+
+        action = args[0]
+
+        # Error handling happens here, not in the action-handlers.
+        try:
+            handlers[action](options, args[1:])
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        return SUCCESS
+
+    def get_cache_dir(self, options, args):
+        # type: (Values, List[Any]) -> None
+        if args:
+            raise CommandError('Too many arguments')
+
+        logger.info(options.cache_dir)
+
+    def get_cache_info(self, options, args):
+        # type: (Values, List[Any]) -> None
+        if args:
+            raise CommandError('Too many arguments')
+
+        num_packages = len(self._find_wheels(options, '*'))
+
+        cache_location = self._wheels_cache_dir(options)
+        cache_size = filesystem.format_directory_size(cache_location)
+
+        message = textwrap.dedent("""
+            Location: {location}
+            Size: {size}
+            Number of wheels: {package_count}
+        """).format(
+            location=cache_location,
+            package_count=num_packages,
+            size=cache_size,
+        ).strip()
+
+        logger.info(message)
+
+    def list_cache_items(self, options, args):
+        # type: (Values, List[Any]) -> None
+        if len(args) > 1:
+            raise CommandError('Too many arguments')
+
+        if args:
+            pattern = args[0]
+        else:
+            pattern = '*'
+
+        files = self._find_wheels(options, pattern)
+
+        if not files:
+            logger.info('Nothing cached.')
+            return
+
+        results = []
+        for filename in files:
+            wheel = os.path.basename(filename)
+            size = filesystem.format_file_size(filename)
+            results.append(' - {} ({})'.format(wheel, size))
+        logger.info('Cache contents:\n')
+        logger.info('\n'.join(sorted(results)))
+
+    def remove_cache_items(self, options, args):
+        # type: (Values, List[Any]) -> None
+        if len(args) > 1:
+            raise CommandError('Too many arguments')
+
+        if not args:
+            raise CommandError('Please provide a pattern')
+
+        files = self._find_wheels(options, args[0])
+        if not files:
+            raise CommandError('No matching packages')
+
+        for filename in files:
+            os.unlink(filename)
+            logger.debug('Removed %s', filename)
+        logger.info('Files removed: %s', len(files))
+
+    def purge_cache(self, options, args):
+        # type: (Values, List[Any]) -> None
+        if args:
+            raise CommandError('Too many arguments')
+
+        return self.remove_cache_items(options, ['*'])
+
+    def _wheels_cache_dir(self, options):
+        # type: (Values) -> str
+        return os.path.join(options.cache_dir, 'wheels')
+
+    def _find_wheels(self, options, pattern):
+        # type: (Values, str) -> List[str]
+        wheel_dir = self._wheels_cache_dir(options)
+
+        # The wheel filename format, as specified in PEP 427, is:
+        #     {distribution}-{version}(-{build})?-{python}-{abi}-{platform}.whl
+        #
+        # Additionally, non-alphanumeric values in the distribution are
+        # normalized to underscores (_), meaning hyphens can never occur
+        # before `-{version}`.
+        #
+        # Given that information:
+        # - If the pattern we're given contains a hyphen (-), the user is
+        #   providing at least the version. Thus, we can just append `*.whl`
+        #   to match the rest of it.
+        # - If the pattern we're given doesn't contain a hyphen (-), the
+        #   user is only providing the name. Thus, we append `-*.whl` to
+        #   match the hyphen before the version, followed by anything else.
+        #
+        # PEP 427: https://www.python.org/dev/peps/pep-0427/
+        pattern = pattern + ("*.whl" if "-" in pattern else "-*.whl")
+
+        return filesystem.find_files(wheel_dir, pattern)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/check.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/check.py
new file mode 100644
index 0000000..b557ca6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/check.py
@@ -0,0 +1,51 @@
+import logging
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.operations.check import (
+    check_package_set,
+    create_package_set_from_installed,
+)
+from pip._internal.utils.misc import write_output
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+logger = logging.getLogger(__name__)
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Any
+    from optparse import Values
+
+
+class CheckCommand(Command):
+    """Verify installed packages have compatible dependencies."""
+
+    usage = """
+      %prog [options]"""
+
+    def run(self, options, args):
+        # type: (Values, List[Any]) -> int
+
+        package_set, parsing_probs = create_package_set_from_installed()
+        missing, conflicting = check_package_set(package_set)
+
+        for project_name in missing:
+            version = package_set[project_name].version
+            for dependency in missing[project_name]:
+                write_output(
+                    "%s %s requires %s, which is not installed.",
+                    project_name, version, dependency[0],
+                )
+
+        for project_name in conflicting:
+            version = package_set[project_name].version
+            for dep_name, dep_version, req in conflicting[project_name]:
+                write_output(
+                    "%s %s has requirement %s, but you have %s %s.",
+                    project_name, version, req, dep_name, dep_version,
+                )
+
+        if missing or conflicting or parsing_probs:
+            return ERROR
+        else:
+            write_output("No broken requirements found.")
+            return SUCCESS
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/completion.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/completion.py
new file mode 100644
index 0000000..9b99f51
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/completion.py
@@ -0,0 +1,98 @@
+from __future__ import absolute_import
+
+import sys
+import textwrap
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.utils.misc import get_prog
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List
+    from optparse import Values
+
+BASE_COMPLETION = """
+# pip {shell} completion start{script}# pip {shell} completion end
+"""
+
+COMPLETION_SCRIPTS = {
+    'bash': """
+        _pip_completion()
+        {{
+            COMPREPLY=( $( COMP_WORDS="${{COMP_WORDS[*]}}" \\
+                           COMP_CWORD=$COMP_CWORD \\
+                           PIP_AUTO_COMPLETE=1 $1 2>/dev/null ) )
+        }}
+        complete -o default -F _pip_completion {prog}
+    """,
+    'zsh': """
+        function _pip_completion {{
+          local words cword
+          read -Ac words
+          read -cn cword
+          reply=( $( COMP_WORDS="$words[*]" \\
+                     COMP_CWORD=$(( cword-1 )) \\
+                     PIP_AUTO_COMPLETE=1 $words[1] 2>/dev/null ))
+        }}
+        compctl -K _pip_completion {prog}
+    """,
+    'fish': """
+        function __fish_complete_pip
+            set -lx COMP_WORDS (commandline -o) ""
+            set -lx COMP_CWORD ( \\
+                math (contains -i -- (commandline -t) $COMP_WORDS)-1 \\
+            )
+            set -lx PIP_AUTO_COMPLETE 1
+            string split \\  -- (eval $COMP_WORDS[1])
+        end
+        complete -fa "(__fish_complete_pip)" -c {prog}
+    """,
+}
+
+
+class CompletionCommand(Command):
+    """A helper command to be used for command completion."""
+
+    ignore_require_venv = True
+
+    def add_options(self):
+        # type: () -> None
+        self.cmd_opts.add_option(
+            '--bash', '-b',
+            action='store_const',
+            const='bash',
+            dest='shell',
+            help='Emit completion code for bash')
+        self.cmd_opts.add_option(
+            '--zsh', '-z',
+            action='store_const',
+            const='zsh',
+            dest='shell',
+            help='Emit completion code for zsh')
+        self.cmd_opts.add_option(
+            '--fish', '-f',
+            action='store_const',
+            const='fish',
+            dest='shell',
+            help='Emit completion code for fish')
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        #  type: (Values, List[str]) -> int
+        """Prints the completion code of the given shell"""
+        shells = COMPLETION_SCRIPTS.keys()
+        shell_options = ['--' + shell for shell in sorted(shells)]
+        if options.shell in shells:
+            script = textwrap.dedent(
+                COMPLETION_SCRIPTS.get(options.shell, '').format(
+                    prog=get_prog())
+            )
+            print(BASE_COMPLETION.format(script=script, shell=options.shell))
+            return SUCCESS
+        else:
+            sys.stderr.write(
+                'ERROR: You must pass {}\n' .format(' or '.join(shell_options))
+            )
+            return SUCCESS
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/configuration.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/configuration.py
new file mode 100644
index 0000000..f9b3ab7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/configuration.py
@@ -0,0 +1,284 @@
+import logging
+import os
+import subprocess
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.configuration import (
+    Configuration,
+    get_configuration_files,
+    kinds,
+)
+from pip._internal.exceptions import PipError
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import get_prog, write_output
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Any, Optional
+    from optparse import Values
+
+    from pip._internal.configuration import Kind
+
+logger = logging.getLogger(__name__)
+
+
+class ConfigurationCommand(Command):
+    """
+    Manage local and global configuration.
+
+    Subcommands:
+
+    - list: List the active configuration (or from the file specified)
+    - edit: Edit the configuration file in an editor
+    - get: Get the value associated with name
+    - set: Set the name=value
+    - unset: Unset the value associated with name
+    - debug: List the configuration files and values defined under them
+
+    If none of --user, --global and --site are passed, a virtual
+    environment configuration file is used if one is active and the file
+    exists. Otherwise, all modifications happen on the to the user file by
+    default.
+    """
+
+    ignore_require_venv = True
+    usage = """
+        %prog [<file-option>] list
+        %prog [<file-option>] [--editor <editor-path>] edit
+
+        %prog [<file-option>] get name
+        %prog [<file-option>] set name value
+        %prog [<file-option>] unset name
+        %prog [<file-option>] debug
+    """
+
+    def add_options(self):
+        # type: () -> None
+        self.cmd_opts.add_option(
+            '--editor',
+            dest='editor',
+            action='store',
+            default=None,
+            help=(
+                'Editor to use to edit the file. Uses VISUAL or EDITOR '
+                'environment variables if not provided.'
+            )
+        )
+
+        self.cmd_opts.add_option(
+            '--global',
+            dest='global_file',
+            action='store_true',
+            default=False,
+            help='Use the system-wide configuration file only'
+        )
+
+        self.cmd_opts.add_option(
+            '--user',
+            dest='user_file',
+            action='store_true',
+            default=False,
+            help='Use the user configuration file only'
+        )
+
+        self.cmd_opts.add_option(
+            '--site',
+            dest='site_file',
+            action='store_true',
+            default=False,
+            help='Use the current environment configuration file only'
+        )
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        handlers = {
+            "list": self.list_values,
+            "edit": self.open_in_editor,
+            "get": self.get_name,
+            "set": self.set_name_value,
+            "unset": self.unset_name,
+            "debug": self.list_config_values,
+        }
+
+        # Determine action
+        if not args or args[0] not in handlers:
+            logger.error(
+                "Need an action (%s) to perform.",
+                ", ".join(sorted(handlers)),
+            )
+            return ERROR
+
+        action = args[0]
+
+        # Determine which configuration files are to be loaded
+        #    Depends on whether the command is modifying.
+        try:
+            load_only = self._determine_file(
+                options, need_value=(action in ["get", "set", "unset", "edit"])
+            )
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        # Load a new configuration
+        self.configuration = Configuration(
+            isolated=options.isolated_mode, load_only=load_only
+        )
+        self.configuration.load()
+
+        # Error handling happens here, not in the action-handlers.
+        try:
+            handlers[action](options, args[1:])
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        return SUCCESS
+
+    def _determine_file(self, options, need_value):
+        # type: (Values, bool) -> Optional[Kind]
+        file_options = [key for key, value in (
+            (kinds.USER, options.user_file),
+            (kinds.GLOBAL, options.global_file),
+            (kinds.SITE, options.site_file),
+        ) if value]
+
+        if not file_options:
+            if not need_value:
+                return None
+            # Default to user, unless there's a site file.
+            elif any(
+                os.path.exists(site_config_file)
+                for site_config_file in get_configuration_files()[kinds.SITE]
+            ):
+                return kinds.SITE
+            else:
+                return kinds.USER
+        elif len(file_options) == 1:
+            return file_options[0]
+
+        raise PipError(
+            "Need exactly one file to operate upon "
+            "(--user, --site, --global) to perform."
+        )
+
+    def list_values(self, options, args):
+        # type: (Values, List[str]) -> None
+        self._get_n_args(args, "list", n=0)
+
+        for key, value in sorted(self.configuration.items()):
+            write_output("%s=%r", key, value)
+
+    def get_name(self, options, args):
+        # type: (Values, List[str]) -> None
+        key = self._get_n_args(args, "get [name]", n=1)
+        value = self.configuration.get_value(key)
+
+        write_output("%s", value)
+
+    def set_name_value(self, options, args):
+        # type: (Values, List[str]) -> None
+        key, value = self._get_n_args(args, "set [name] [value]", n=2)
+        self.configuration.set_value(key, value)
+
+        self._save_configuration()
+
+    def unset_name(self, options, args):
+        # type: (Values, List[str]) -> None
+        key = self._get_n_args(args, "unset [name]", n=1)
+        self.configuration.unset_value(key)
+
+        self._save_configuration()
+
+    def list_config_values(self, options, args):
+        # type: (Values, List[str]) -> None
+        """List config key-value pairs across different config files"""
+        self._get_n_args(args, "debug", n=0)
+
+        self.print_env_var_values()
+        # Iterate over config files and print if they exist, and the
+        # key-value pairs present in them if they do
+        for variant, files in sorted(self.configuration.iter_config_files()):
+            write_output("%s:", variant)
+            for fname in files:
+                with indent_log():
+                    file_exists = os.path.exists(fname)
+                    write_output("%s, exists: %r",
+                                 fname, file_exists)
+                    if file_exists:
+                        self.print_config_file_values(variant)
+
+    def print_config_file_values(self, variant):
+        # type: (Kind) -> None
+        """Get key-value pairs from the file of a variant"""
+        for name, value in self.configuration.\
+                get_values_in_config(variant).items():
+            with indent_log():
+                write_output("%s: %s", name, value)
+
+    def print_env_var_values(self):
+        # type: () -> None
+        """Get key-values pairs present as environment variables"""
+        write_output("%s:", 'env_var')
+        with indent_log():
+            for key, value in sorted(self.configuration.get_environ_vars()):
+                env_var = 'PIP_{}'.format(key.upper())
+                write_output("%s=%r", env_var, value)
+
+    def open_in_editor(self, options, args):
+        # type: (Values, List[str]) -> None
+        editor = self._determine_editor(options)
+
+        fname = self.configuration.get_file_to_edit()
+        if fname is None:
+            raise PipError("Could not determine appropriate file.")
+
+        try:
+            subprocess.check_call([editor, fname])
+        except subprocess.CalledProcessError as e:
+            raise PipError(
+                "Editor Subprocess exited with exit code {}"
+                .format(e.returncode)
+            )
+
+    def _get_n_args(self, args, example, n):
+        # type: (List[str], str, int) -> Any
+        """Helper to make sure the command got the right number of arguments
+        """
+        if len(args) != n:
+            msg = (
+                'Got unexpected number of arguments, expected {}. '
+                '(example: "{} config {}")'
+            ).format(n, get_prog(), example)
+            raise PipError(msg)
+
+        if n == 1:
+            return args[0]
+        else:
+            return args
+
+    def _save_configuration(self):
+        # type: () -> None
+        # We successfully ran a modifying command. Need to save the
+        # configuration.
+        try:
+            self.configuration.save()
+        except Exception:
+            logger.exception(
+                "Unable to save configuration. Please report this as a bug."
+            )
+            raise PipError("Internal Error.")
+
+    def _determine_editor(self, options):
+        # type: (Values) -> str
+        if options.editor is not None:
+            return options.editor
+        elif "VISUAL" in os.environ:
+            return os.environ["VISUAL"]
+        elif "EDITOR" in os.environ:
+            return os.environ["EDITOR"]
+        else:
+            raise PipError("Could not determine editor to use.")
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/debug.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/debug.py
new file mode 100644
index 0000000..ff369d7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/debug.py
@@ -0,0 +1,229 @@
+from __future__ import absolute_import
+
+import locale
+import logging
+import os
+import sys
+
+import pip._vendor
+from pip._vendor import pkg_resources
+from pip._vendor.certifi import where
+
+from pip import __file__ as pip_location
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import get_pip_version
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from types import ModuleType
+    from typing import List, Optional, Dict
+    from optparse import Values
+    from pip._internal.configuration import Configuration
+
+logger = logging.getLogger(__name__)
+
+
+def show_value(name, value):
+    # type: (str, Optional[str]) -> None
+    logger.info('%s: %s', name, value)
+
+
+def show_sys_implementation():
+    # type: () -> None
+    logger.info('sys.implementation:')
+    if hasattr(sys, 'implementation'):
+        implementation = sys.implementation  # type: ignore
+        implementation_name = implementation.name
+    else:
+        implementation_name = ''
+
+    with indent_log():
+        show_value('name', implementation_name)
+
+
+def create_vendor_txt_map():
+    # type: () -> Dict[str, str]
+    vendor_txt_path = os.path.join(
+        os.path.dirname(pip_location),
+        '_vendor',
+        'vendor.txt'
+    )
+
+    with open(vendor_txt_path) as f:
+        # Purge non version specifying lines.
+        # Also, remove any space prefix or suffixes (including comments).
+        lines = [line.strip().split(' ', 1)[0]
+                 for line in f.readlines() if '==' in line]
+
+    # Transform into "module" -> version dict.
+    return dict(line.split('==', 1) for line in lines)  # type: ignore
+
+
+def get_module_from_module_name(module_name):
+    # type: (str) -> ModuleType
+    # Module name can be uppercase in vendor.txt for some reason...
+    module_name = module_name.lower()
+    # PATCH: setuptools is actually only pkg_resources.
+    if module_name == 'setuptools':
+        module_name = 'pkg_resources'
+
+    __import__(
+        'pip._vendor.{}'.format(module_name),
+        globals(),
+        locals(),
+        level=0
+    )
+    return getattr(pip._vendor, module_name)
+
+
+def get_vendor_version_from_module(module_name):
+    # type: (str) -> Optional[str]
+    module = get_module_from_module_name(module_name)
+    version = getattr(module, '__version__', None)
+
+    if not version:
+        # Try to find version in debundled module info
+        # The type for module.__file__ is Optional[str] in
+        # Python 2, and str in Python 3. The type: ignore is
+        # added to account for Python 2, instead of a cast
+        # and should be removed once we drop Python 2 support
+        pkg_set = pkg_resources.WorkingSet(
+            [os.path.dirname(module.__file__)]  # type: ignore
+        )
+        package = pkg_set.find(pkg_resources.Requirement.parse(module_name))
+        version = getattr(package, 'version', None)
+
+    return version
+
+
+def show_actual_vendor_versions(vendor_txt_versions):
+    # type: (Dict[str, str]) -> None
+    """Log the actual version and print extra info if there is
+    a conflict or if the actual version could not be imported.
+    """
+    for module_name, expected_version in vendor_txt_versions.items():
+        extra_message = ''
+        actual_version = get_vendor_version_from_module(module_name)
+        if not actual_version:
+            extra_message = ' (Unable to locate actual module version, using'\
+                            ' vendor.txt specified version)'
+            actual_version = expected_version
+        elif actual_version != expected_version:
+            extra_message = ' (CONFLICT: vendor.txt suggests version should'\
+                            ' be {})'.format(expected_version)
+        logger.info('%s==%s%s', module_name, actual_version, extra_message)
+
+
+def show_vendor_versions():
+    # type: () -> None
+    logger.info('vendored library versions:')
+
+    vendor_txt_versions = create_vendor_txt_map()
+    with indent_log():
+        show_actual_vendor_versions(vendor_txt_versions)
+
+
+def show_tags(options):
+    # type: (Values) -> None
+    tag_limit = 10
+
+    target_python = make_target_python(options)
+    tags = target_python.get_tags()
+
+    # Display the target options that were explicitly provided.
+    formatted_target = target_python.format_given()
+    suffix = ''
+    if formatted_target:
+        suffix = ' (target: {})'.format(formatted_target)
+
+    msg = 'Compatible tags: {}{}'.format(len(tags), suffix)
+    logger.info(msg)
+
+    if options.verbose < 1 and len(tags) > tag_limit:
+        tags_limited = True
+        tags = tags[:tag_limit]
+    else:
+        tags_limited = False
+
+    with indent_log():
+        for tag in tags:
+            logger.info(str(tag))
+
+        if tags_limited:
+            msg = (
+                '...\n'
+                '[First {tag_limit} tags shown. Pass --verbose to show all.]'
+            ).format(tag_limit=tag_limit)
+            logger.info(msg)
+
+
+def ca_bundle_info(config):
+    # type: (Configuration) -> str
+    levels = set()
+    for key, _ in config.items():
+        levels.add(key.split('.')[0])
+
+    if not levels:
+        return "Not specified"
+
+    levels_that_override_global = ['install', 'wheel', 'download']
+    global_overriding_level = [
+        level for level in levels if level in levels_that_override_global
+    ]
+    if not global_overriding_level:
+        return 'global'
+
+    if 'global' in levels:
+        levels.remove('global')
+    return ", ".join(levels)
+
+
+class DebugCommand(Command):
+    """
+    Display debug information.
+    """
+
+    usage = """
+      %prog <options>"""
+    ignore_require_venv = True
+
+    def add_options(self):
+        # type: () -> None
+        cmdoptions.add_target_python_options(self.cmd_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+        self.parser.config.load()
+
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        logger.warning(
+            "This command is only meant for debugging. "
+            "Do not use this with automation for parsing and getting these "
+            "details, since the output and options of this command may "
+            "change without notice."
+        )
+        show_value('pip version', get_pip_version())
+        show_value('sys.version', sys.version)
+        show_value('sys.executable', sys.executable)
+        show_value('sys.getdefaultencoding', sys.getdefaultencoding())
+        show_value('sys.getfilesystemencoding', sys.getfilesystemencoding())
+        show_value(
+            'locale.getpreferredencoding', locale.getpreferredencoding(),
+        )
+        show_value('sys.platform', sys.platform)
+        show_sys_implementation()
+
+        show_value("'cert' config value", ca_bundle_info(self.parser.config))
+        show_value("REQUESTS_CA_BUNDLE", os.environ.get('REQUESTS_CA_BUNDLE'))
+        show_value("CURL_CA_BUNDLE", os.environ.get('CURL_CA_BUNDLE'))
+        show_value("pip._vendor.certifi.where()", where())
+        show_value("pip._vendor.DEBUNDLED", pip._vendor.DEBUNDLED)
+
+        show_vendor_versions()
+
+        show_tags(options)
+
+        return SUCCESS
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/download.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/download.py
new file mode 100644
index 0000000..46e8371
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/download.py
@@ -0,0 +1,143 @@
+from __future__ import absolute_import
+
+import logging
+import os
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.req_command import RequirementCommand, with_cleanup
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.req.req_tracker import get_requirement_tracker
+from pip._internal.utils.misc import ensure_dir, normalize_path, write_output
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import List
+
+logger = logging.getLogger(__name__)
+
+
+class DownloadCommand(RequirementCommand):
+    """
+    Download packages from:
+
+    - PyPI (and other indexes) using requirement specifiers.
+    - VCS project urls.
+    - Local project directories.
+    - Local or remote source archives.
+
+    pip also supports downloading from "requirements files", which provide
+    an easy way to specify a whole environment to be downloaded.
+    """
+
+    usage = """
+      %prog [options] <requirement specifier> [package-index-options] ...
+      %prog [options] -r <requirements file> [package-index-options] ...
+      %prog [options] <vcs project url> ...
+      %prog [options] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    def add_options(self):
+        # type: () -> None
+        self.cmd_opts.add_option(cmdoptions.constraints())
+        self.cmd_opts.add_option(cmdoptions.requirements())
+        self.cmd_opts.add_option(cmdoptions.build_dir())
+        self.cmd_opts.add_option(cmdoptions.no_deps())
+        self.cmd_opts.add_option(cmdoptions.global_options())
+        self.cmd_opts.add_option(cmdoptions.no_binary())
+        self.cmd_opts.add_option(cmdoptions.only_binary())
+        self.cmd_opts.add_option(cmdoptions.prefer_binary())
+        self.cmd_opts.add_option(cmdoptions.src())
+        self.cmd_opts.add_option(cmdoptions.pre())
+        self.cmd_opts.add_option(cmdoptions.require_hashes())
+        self.cmd_opts.add_option(cmdoptions.progress_bar())
+        self.cmd_opts.add_option(cmdoptions.no_build_isolation())
+        self.cmd_opts.add_option(cmdoptions.use_pep517())
+        self.cmd_opts.add_option(cmdoptions.no_use_pep517())
+
+        self.cmd_opts.add_option(
+            '-d', '--dest', '--destination-dir', '--destination-directory',
+            dest='download_dir',
+            metavar='dir',
+            default=os.curdir,
+            help=("Download packages into <dir>."),
+        )
+
+        cmdoptions.add_target_python_options(self.cmd_opts)
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    @with_cleanup
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+
+        options.ignore_installed = True
+        # editable doesn't really make sense for `pip download`, but the bowels
+        # of the RequirementSet code require that property.
+        options.editables = []
+
+        cmdoptions.check_dist_restriction(options)
+
+        options.download_dir = normalize_path(options.download_dir)
+
+        ensure_dir(options.download_dir)
+
+        session = self.get_default_session(options)
+
+        target_python = make_target_python(options)
+        finder = self._build_package_finder(
+            options=options,
+            session=session,
+            target_python=target_python,
+        )
+        build_delete = (not (options.no_clean or options.build_dir))
+
+        req_tracker = self.enter_context(get_requirement_tracker())
+
+        directory = TempDirectory(
+            options.build_dir,
+            delete=build_delete,
+            kind="download",
+            globally_managed=True,
+        )
+
+        reqs = self.get_requirements(args, options, finder, session)
+
+        preparer = self.make_requirement_preparer(
+            temp_build_dir=directory,
+            options=options,
+            req_tracker=req_tracker,
+            session=session,
+            finder=finder,
+            download_dir=options.download_dir,
+            use_user_site=False,
+        )
+
+        resolver = self.make_resolver(
+            preparer=preparer,
+            finder=finder,
+            options=options,
+            py_version_info=options.python_version,
+        )
+
+        self.trace_basic_info(finder)
+
+        requirement_set = resolver.resolve(
+            reqs, check_supported_wheels=True
+        )
+
+        downloaded = ' '.join([req.name  # type: ignore
+                               for req in requirement_set.requirements.values()
+                               if req.successfully_downloaded])
+        if downloaded:
+            write_output('Successfully downloaded %s', downloaded)
+
+        return SUCCESS
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/freeze.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/freeze.py
new file mode 100644
index 0000000..2071fba
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/freeze.py
@@ -0,0 +1,103 @@
+from __future__ import absolute_import
+
+import sys
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.models.format_control import FormatControl
+from pip._internal.operations.freeze import freeze
+from pip._internal.utils.compat import stdlib_pkgs
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+DEV_PKGS = {'pip', 'setuptools', 'distribute', 'wheel'}
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import List
+
+
+class FreezeCommand(Command):
+    """
+    Output installed packages in requirements format.
+
+    packages are listed in a case-insensitive sorted order.
+    """
+
+    usage = """
+      %prog [options]"""
+    log_streams = ("ext://sys.stderr", "ext://sys.stderr")
+
+    def add_options(self):
+        # type: () -> None
+        self.cmd_opts.add_option(
+            '-r', '--requirement',
+            dest='requirements',
+            action='append',
+            default=[],
+            metavar='file',
+            help="Use the order in the given requirements file and its "
+                 "comments when generating output. This option can be "
+                 "used multiple times.")
+        self.cmd_opts.add_option(
+            '-f', '--find-links',
+            dest='find_links',
+            action='append',
+            default=[],
+            metavar='URL',
+            help='URL for finding packages, which will be added to the '
+                 'output.')
+        self.cmd_opts.add_option(
+            '-l', '--local',
+            dest='local',
+            action='store_true',
+            default=False,
+            help='If in a virtualenv that has global access, do not output '
+                 'globally-installed packages.')
+        self.cmd_opts.add_option(
+            '--user',
+            dest='user',
+            action='store_true',
+            default=False,
+            help='Only output packages installed in user-site.')
+        self.cmd_opts.add_option(cmdoptions.list_path())
+        self.cmd_opts.add_option(
+            '--all',
+            dest='freeze_all',
+            action='store_true',
+            help='Do not skip these packages in the output:'
+                 ' {}'.format(', '.join(DEV_PKGS)))
+        self.cmd_opts.add_option(
+            '--exclude-editable',
+            dest='exclude_editable',
+            action='store_true',
+            help='Exclude editable package from output.')
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        format_control = FormatControl(set(), set())
+        wheel_cache = WheelCache(options.cache_dir, format_control)
+        skip = set(stdlib_pkgs)
+        if not options.freeze_all:
+            skip.update(DEV_PKGS)
+
+        cmdoptions.check_list_path_option(options)
+
+        freeze_kwargs = dict(
+            requirement=options.requirements,
+            find_links=options.find_links,
+            local_only=options.local,
+            user_only=options.user,
+            paths=options.path,
+            isolated=options.isolated_mode,
+            wheel_cache=wheel_cache,
+            skip=skip,
+            exclude_editable=options.exclude_editable,
+        )
+
+        for line in freeze(**freeze_kwargs):
+            sys.stdout.write(line + '\n')
+        return SUCCESS
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/hash.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/hash.py
new file mode 100644
index 0000000..37831c3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/hash.py
@@ -0,0 +1,63 @@
+from __future__ import absolute_import
+
+import hashlib
+import logging
+import sys
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.utils.hashes import FAVORITE_HASH, STRONG_HASHES
+from pip._internal.utils.misc import read_chunks, write_output
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import List
+
+logger = logging.getLogger(__name__)
+
+
+class HashCommand(Command):
+    """
+    Compute a hash of a local package archive.
+
+    These can be used with --hash in a requirements file to do repeatable
+    installs.
+    """
+
+    usage = '%prog [options] <file> ...'
+    ignore_require_venv = True
+
+    def add_options(self):
+        # type: () -> None
+        self.cmd_opts.add_option(
+            '-a', '--algorithm',
+            dest='algorithm',
+            choices=STRONG_HASHES,
+            action='store',
+            default=FAVORITE_HASH,
+            help='The hash algorithm to use: one of {}'.format(
+                 ', '.join(STRONG_HASHES)))
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        if not args:
+            self.parser.print_usage(sys.stderr)
+            return ERROR
+
+        algorithm = options.algorithm
+        for path in args:
+            write_output('%s:\n--hash=%s:%s',
+                         path, algorithm, _hash_of_file(path, algorithm))
+        return SUCCESS
+
+
+def _hash_of_file(path, algorithm):
+    # type: (str, str) -> str
+    """Return the hash digest of a file."""
+    with open(path, 'rb') as archive:
+        hash = hashlib.new(algorithm)
+        for chunk in read_chunks(archive):
+            hash.update(chunk)
+    return hash.hexdigest()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/help.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/help.py
new file mode 100644
index 0000000..a2edc29
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/help.py
@@ -0,0 +1,44 @@
+from __future__ import absolute_import
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.exceptions import CommandError
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List
+    from optparse import Values
+
+
+class HelpCommand(Command):
+    """Show help for commands"""
+
+    usage = """
+      %prog <command>"""
+    ignore_require_venv = True
+
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        from pip._internal.commands import (
+            commands_dict, create_command, get_similar_commands,
+        )
+
+        try:
+            # 'pip help' with no args is handled by pip.__init__.parseopt()
+            cmd_name = args[0]  # the command we need help for
+        except IndexError:
+            return SUCCESS
+
+        if cmd_name not in commands_dict:
+            guess = get_similar_commands(cmd_name)
+
+            msg = ['unknown command "{}"'.format(cmd_name)]
+            if guess:
+                msg.append('maybe you meant "{}"'.format(guess))
+
+            raise CommandError(' - '.join(msg))
+
+        command = create_command(cmd_name)
+        command.parser.print_help()
+
+        return SUCCESS
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/install.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/install.py
new file mode 100644
index 0000000..704e2d6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/install.py
@@ -0,0 +1,749 @@
+from __future__ import absolute_import
+
+import errno
+import logging
+import operator
+import os
+import shutil
+import site
+from optparse import SUPPRESS_HELP
+
+from pip._vendor import pkg_resources
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.req_command import RequirementCommand, with_cleanup
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.exceptions import CommandError, InstallationError
+from pip._internal.locations import distutils_scheme
+from pip._internal.operations.check import check_install_conflicts
+from pip._internal.req import install_given_reqs
+from pip._internal.req.req_tracker import get_requirement_tracker
+from pip._internal.utils.datetime import today_is_later_than
+from pip._internal.utils.distutils_args import parse_distutils_args
+from pip._internal.utils.filesystem import test_writable_dir
+from pip._internal.utils.misc import (
+    ensure_dir,
+    get_installed_version,
+    get_pip_version,
+    protect_pip_from_modification_on_windows,
+    write_output,
+)
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.virtualenv import virtualenv_no_global
+from pip._internal.wheel_builder import build, should_build_for_install_command
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import Iterable, List, Optional
+
+    from pip._internal.models.format_control import FormatControl
+    from pip._internal.operations.check import ConflictDetails
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.wheel_builder import BinaryAllowedPredicate
+
+
+logger = logging.getLogger(__name__)
+
+
+def get_check_binary_allowed(format_control):
+    # type: (FormatControl) -> BinaryAllowedPredicate
+    def check_binary_allowed(req):
+        # type: (InstallRequirement) -> bool
+        if req.use_pep517:
+            return True
+        canonical_name = canonicalize_name(req.name)
+        allowed_formats = format_control.get_allowed_formats(canonical_name)
+        return "binary" in allowed_formats
+
+    return check_binary_allowed
+
+
+class InstallCommand(RequirementCommand):
+    """
+    Install packages from:
+
+    - PyPI (and other indexes) using requirement specifiers.
+    - VCS project urls.
+    - Local project directories.
+    - Local or remote source archives.
+
+    pip also supports installing from "requirements files", which provide
+    an easy way to specify a whole environment to be installed.
+    """
+
+    usage = """
+      %prog [options] <requirement specifier> [package-index-options] ...
+      %prog [options] -r <requirements file> [package-index-options] ...
+      %prog [options] [-e] <vcs project url> ...
+      %prog [options] [-e] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    def add_options(self):
+        # type: () -> None
+        self.cmd_opts.add_option(cmdoptions.requirements())
+        self.cmd_opts.add_option(cmdoptions.constraints())
+        self.cmd_opts.add_option(cmdoptions.no_deps())
+        self.cmd_opts.add_option(cmdoptions.pre())
+
+        self.cmd_opts.add_option(cmdoptions.editable())
+        self.cmd_opts.add_option(
+            '-t', '--target',
+            dest='target_dir',
+            metavar='dir',
+            default=None,
+            help='Install packages into <dir>. '
+                 'By default this will not replace existing files/folders in '
+                 '<dir>. Use --upgrade to replace existing packages in <dir> '
+                 'with new versions.'
+        )
+        cmdoptions.add_target_python_options(self.cmd_opts)
+
+        self.cmd_opts.add_option(
+            '--user',
+            dest='use_user_site',
+            action='store_true',
+            help="Install to the Python user install directory for your "
+                 "platform. Typically ~/.local/, or %APPDATA%\\Python on "
+                 "Windows. (See the Python documentation for site.USER_BASE "
+                 "for full details.)")
+        self.cmd_opts.add_option(
+            '--no-user',
+            dest='use_user_site',
+            action='store_false',
+            help=SUPPRESS_HELP)
+        self.cmd_opts.add_option(
+            '--root',
+            dest='root_path',
+            metavar='dir',
+            default=None,
+            help="Install everything relative to this alternate root "
+                 "directory.")
+        self.cmd_opts.add_option(
+            '--prefix',
+            dest='prefix_path',
+            metavar='dir',
+            default=None,
+            help="Installation prefix where lib, bin and other top-level "
+                 "folders are placed")
+
+        self.cmd_opts.add_option(cmdoptions.build_dir())
+
+        self.cmd_opts.add_option(cmdoptions.src())
+
+        self.cmd_opts.add_option(
+            '-U', '--upgrade',
+            dest='upgrade',
+            action='store_true',
+            help='Upgrade all specified packages to the newest available '
+                 'version. The handling of dependencies depends on the '
+                 'upgrade-strategy used.'
+        )
+
+        self.cmd_opts.add_option(
+            '--upgrade-strategy',
+            dest='upgrade_strategy',
+            default='only-if-needed',
+            choices=['only-if-needed', 'eager'],
+            help='Determines how dependency upgrading should be handled '
+                 '[default: %default]. '
+                 '"eager" - dependencies are upgraded regardless of '
+                 'whether the currently installed version satisfies the '
+                 'requirements of the upgraded package(s). '
+                 '"only-if-needed" -  are upgraded only when they do not '
+                 'satisfy the requirements of the upgraded package(s).'
+        )
+
+        self.cmd_opts.add_option(
+            '--force-reinstall',
+            dest='force_reinstall',
+            action='store_true',
+            help='Reinstall all packages even if they are already '
+                 'up-to-date.')
+
+        self.cmd_opts.add_option(
+            '-I', '--ignore-installed',
+            dest='ignore_installed',
+            action='store_true',
+            help='Ignore the installed packages, overwriting them. '
+                 'This can break your system if the existing package '
+                 'is of a different version or was installed '
+                 'with a different package manager!'
+        )
+
+        self.cmd_opts.add_option(cmdoptions.ignore_requires_python())
+        self.cmd_opts.add_option(cmdoptions.no_build_isolation())
+        self.cmd_opts.add_option(cmdoptions.use_pep517())
+        self.cmd_opts.add_option(cmdoptions.no_use_pep517())
+
+        self.cmd_opts.add_option(cmdoptions.install_options())
+        self.cmd_opts.add_option(cmdoptions.global_options())
+
+        self.cmd_opts.add_option(
+            "--compile",
+            action="store_true",
+            dest="compile",
+            default=True,
+            help="Compile Python source files to bytecode",
+        )
+
+        self.cmd_opts.add_option(
+            "--no-compile",
+            action="store_false",
+            dest="compile",
+            help="Do not compile Python source files to bytecode",
+        )
+
+        self.cmd_opts.add_option(
+            "--no-warn-script-location",
+            action="store_false",
+            dest="warn_script_location",
+            default=True,
+            help="Do not warn when installing scripts outside PATH",
+        )
+        self.cmd_opts.add_option(
+            "--no-warn-conflicts",
+            action="store_false",
+            dest="warn_about_conflicts",
+            default=True,
+            help="Do not warn about broken dependencies",
+        )
+
+        self.cmd_opts.add_option(cmdoptions.no_binary())
+        self.cmd_opts.add_option(cmdoptions.only_binary())
+        self.cmd_opts.add_option(cmdoptions.prefer_binary())
+        self.cmd_opts.add_option(cmdoptions.require_hashes())
+        self.cmd_opts.add_option(cmdoptions.progress_bar())
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    @with_cleanup
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        if options.use_user_site and options.target_dir is not None:
+            raise CommandError("Can not combine '--user' and '--target'")
+
+        cmdoptions.check_install_build_global(options)
+        upgrade_strategy = "to-satisfy-only"
+        if options.upgrade:
+            upgrade_strategy = options.upgrade_strategy
+
+        cmdoptions.check_dist_restriction(options, check_target=True)
+
+        install_options = options.install_options or []
+
+        logger.debug("Using %s", get_pip_version())
+        options.use_user_site = decide_user_install(
+            options.use_user_site,
+            prefix_path=options.prefix_path,
+            target_dir=options.target_dir,
+            root_path=options.root_path,
+            isolated_mode=options.isolated_mode,
+        )
+
+        target_temp_dir = None  # type: Optional[TempDirectory]
+        target_temp_dir_path = None  # type: Optional[str]
+        if options.target_dir:
+            options.ignore_installed = True
+            options.target_dir = os.path.abspath(options.target_dir)
+            if (os.path.exists(options.target_dir) and not
+                    os.path.isdir(options.target_dir)):
+                raise CommandError(
+                    "Target path exists but is not a directory, will not "
+                    "continue."
+                )
+
+            # Create a target directory for using with the target option
+            target_temp_dir = TempDirectory(kind="target")
+            target_temp_dir_path = target_temp_dir.path
+            self.enter_context(target_temp_dir)
+
+        global_options = options.global_options or []
+
+        session = self.get_default_session(options)
+
+        target_python = make_target_python(options)
+        finder = self._build_package_finder(
+            options=options,
+            session=session,
+            target_python=target_python,
+            ignore_requires_python=options.ignore_requires_python,
+        )
+        build_delete = (not (options.no_clean or options.build_dir))
+        wheel_cache = WheelCache(options.cache_dir, options.format_control)
+
+        req_tracker = self.enter_context(get_requirement_tracker())
+
+        directory = TempDirectory(
+            options.build_dir,
+            delete=build_delete,
+            kind="install",
+            globally_managed=True,
+        )
+
+        try:
+            reqs = self.get_requirements(args, options, finder, session)
+
+            reject_location_related_install_options(
+                reqs, options.install_options
+            )
+
+            preparer = self.make_requirement_preparer(
+                temp_build_dir=directory,
+                options=options,
+                req_tracker=req_tracker,
+                session=session,
+                finder=finder,
+                use_user_site=options.use_user_site,
+            )
+            resolver = self.make_resolver(
+                preparer=preparer,
+                finder=finder,
+                options=options,
+                wheel_cache=wheel_cache,
+                use_user_site=options.use_user_site,
+                ignore_installed=options.ignore_installed,
+                ignore_requires_python=options.ignore_requires_python,
+                force_reinstall=options.force_reinstall,
+                upgrade_strategy=upgrade_strategy,
+                use_pep517=options.use_pep517,
+            )
+
+            self.trace_basic_info(finder)
+
+            requirement_set = resolver.resolve(
+                reqs, check_supported_wheels=not options.target_dir
+            )
+
+            try:
+                pip_req = requirement_set.get_requirement("pip")
+            except KeyError:
+                modifying_pip = False
+            else:
+                # If we're not replacing an already installed pip,
+                # we're not modifying it.
+                modifying_pip = pip_req.satisfied_by is None
+            protect_pip_from_modification_on_windows(
+                modifying_pip=modifying_pip
+            )
+
+            check_binary_allowed = get_check_binary_allowed(
+                finder.format_control
+            )
+
+            reqs_to_build = [
+                r for r in requirement_set.requirements.values()
+                if should_build_for_install_command(
+                    r, check_binary_allowed
+                )
+            ]
+
+            _, build_failures = build(
+                reqs_to_build,
+                wheel_cache=wheel_cache,
+                build_options=[],
+                global_options=[],
+            )
+
+            # If we're using PEP 517, we cannot do a direct install
+            # so we fail here.
+            pep517_build_failure_names = [
+                r.name   # type: ignore
+                for r in build_failures if r.use_pep517
+            ]  # type: List[str]
+            if pep517_build_failure_names:
+                raise InstallationError(
+                    "Could not build wheels for {} which use"
+                    " PEP 517 and cannot be installed directly".format(
+                        ", ".join(pep517_build_failure_names)
+                    )
+                )
+
+            # For now, we just warn about failures building legacy
+            # requirements, as we'll fall through to a direct
+            # install for those.
+            for r in build_failures:
+                if not r.use_pep517:
+                    r.legacy_install_reason = 8368
+
+            to_install = resolver.get_installation_order(
+                requirement_set
+            )
+
+            # Check for conflicts in the package set we're installing.
+            conflicts = None  # type: Optional[ConflictDetails]
+            should_warn_about_conflicts = (
+                not options.ignore_dependencies and
+                options.warn_about_conflicts
+            )
+            if should_warn_about_conflicts:
+                conflicts = self._determine_conflicts(to_install)
+
+            # Don't warn about script install locations if
+            # --target has been specified
+            warn_script_location = options.warn_script_location
+            if options.target_dir:
+                warn_script_location = False
+
+            installed = install_given_reqs(
+                to_install,
+                install_options,
+                global_options,
+                root=options.root_path,
+                home=target_temp_dir_path,
+                prefix=options.prefix_path,
+                warn_script_location=warn_script_location,
+                use_user_site=options.use_user_site,
+                pycompile=options.compile,
+            )
+
+            lib_locations = get_lib_location_guesses(
+                user=options.use_user_site,
+                home=target_temp_dir_path,
+                root=options.root_path,
+                prefix=options.prefix_path,
+                isolated=options.isolated_mode,
+            )
+            working_set = pkg_resources.WorkingSet(lib_locations)
+
+            installed.sort(key=operator.attrgetter('name'))
+            items = []
+            for result in installed:
+                item = result.name
+                try:
+                    installed_version = get_installed_version(
+                        result.name, working_set=working_set
+                    )
+                    if installed_version:
+                        item += '-' + installed_version
+                except Exception:
+                    pass
+                items.append(item)
+
+            if conflicts is not None:
+                self._warn_about_conflicts(
+                    conflicts,
+                    new_resolver='2020-resolver' in options.features_enabled,
+                )
+
+            installed_desc = ' '.join(items)
+            if installed_desc:
+                write_output(
+                    'Successfully installed %s', installed_desc,
+                )
+        except EnvironmentError as error:
+            show_traceback = (self.verbosity >= 1)
+
+            message = create_env_error_message(
+                error, show_traceback, options.use_user_site,
+            )
+            logger.error(message, exc_info=show_traceback)  # noqa
+
+            return ERROR
+
+        if options.target_dir:
+            assert target_temp_dir
+            self._handle_target_dir(
+                options.target_dir, target_temp_dir, options.upgrade
+            )
+
+        return SUCCESS
+
+    def _handle_target_dir(self, target_dir, target_temp_dir, upgrade):
+        # type: (str, TempDirectory, bool) -> None
+        ensure_dir(target_dir)
+
+        # Checking both purelib and platlib directories for installed
+        # packages to be moved to target directory
+        lib_dir_list = []
+
+        # Checking both purelib and platlib directories for installed
+        # packages to be moved to target directory
+        scheme = distutils_scheme('', home=target_temp_dir.path)
+        purelib_dir = scheme['purelib']
+        platlib_dir = scheme['platlib']
+        data_dir = scheme['data']
+
+        if os.path.exists(purelib_dir):
+            lib_dir_list.append(purelib_dir)
+        if os.path.exists(platlib_dir) and platlib_dir != purelib_dir:
+            lib_dir_list.append(platlib_dir)
+        if os.path.exists(data_dir):
+            lib_dir_list.append(data_dir)
+
+        for lib_dir in lib_dir_list:
+            for item in os.listdir(lib_dir):
+                if lib_dir == data_dir:
+                    ddir = os.path.join(data_dir, item)
+                    if any(s.startswith(ddir) for s in lib_dir_list[:-1]):
+                        continue
+                target_item_dir = os.path.join(target_dir, item)
+                if os.path.exists(target_item_dir):
+                    if not upgrade:
+                        logger.warning(
+                            'Target directory %s already exists. Specify '
+                            '--upgrade to force replacement.',
+                            target_item_dir
+                        )
+                        continue
+                    if os.path.islink(target_item_dir):
+                        logger.warning(
+                            'Target directory %s already exists and is '
+                            'a link. pip will not automatically replace '
+                            'links, please remove if replacement is '
+                            'desired.',
+                            target_item_dir
+                        )
+                        continue
+                    if os.path.isdir(target_item_dir):
+                        shutil.rmtree(target_item_dir)
+                    else:
+                        os.remove(target_item_dir)
+
+                shutil.move(
+                    os.path.join(lib_dir, item),
+                    target_item_dir
+                )
+
+    def _determine_conflicts(self, to_install):
+        # type: (List[InstallRequirement]) -> Optional[ConflictDetails]
+        try:
+            return check_install_conflicts(to_install)
+        except Exception:
+            logger.exception(
+                "Error while checking for conflicts. Please file an issue on "
+                "pip's issue tracker: https://github.com/pypa/pip/issues/new"
+            )
+            return None
+
+    def _warn_about_conflicts(self, conflict_details, new_resolver):
+        # type: (ConflictDetails, bool) -> None
+        package_set, (missing, conflicting) = conflict_details
+        if not missing and not conflicting:
+            return
+
+        parts = []  # type: List[str]
+        if not new_resolver:
+            parts.append(
+                "After October 2020 you may experience errors when installing "
+                "or updating packages. This is because pip will change the "
+                "way that it resolves dependency conflicts.\n"
+            )
+            parts.append(
+                "We recommend you use --use-feature=2020-resolver to test "
+                "your packages with the new resolver before it becomes the "
+                "default.\n"
+            )
+        elif not today_is_later_than(year=2020, month=7, day=31):
+            # NOTE: trailing newlines here are intentional
+            parts.append(
+                "Pip will install or upgrade your package(s) and its "
+                "dependencies without taking into account other packages you "
+                "already have installed. This may cause an uncaught "
+                "dependency conflict.\n"
+            )
+            form_link = "https://forms.gle/cWKMoDs8sUVE29hz9"
+            parts.append(
+                "If you would like pip to take your other packages into "
+                "account, please tell us here: {}\n".format(form_link)
+            )
+
+        # NOTE: There is some duplication here, with commands/check.py
+        for project_name in missing:
+            version = package_set[project_name][0]
+            for dependency in missing[project_name]:
+                message = (
+                    "{name} {version} requires {requirement}, "
+                    "which is not installed."
+                ).format(
+                    name=project_name,
+                    version=version,
+                    requirement=dependency[1],
+                )
+                parts.append(message)
+
+        for project_name in conflicting:
+            version = package_set[project_name][0]
+            for dep_name, dep_version, req in conflicting[project_name]:
+                message = (
+                    "{name} {version} requires {requirement}, but you'll have "
+                    "{dep_name} {dep_version} which is incompatible."
+                ).format(
+                    name=project_name,
+                    version=version,
+                    requirement=req,
+                    dep_name=dep_name,
+                    dep_version=dep_version,
+                )
+                parts.append(message)
+
+        logger.critical("\n".join(parts))
+
+
+def get_lib_location_guesses(
+        user=False,  # type: bool
+        home=None,  # type: Optional[str]
+        root=None,  # type: Optional[str]
+        isolated=False,  # type: bool
+        prefix=None  # type: Optional[str]
+):
+    # type:(...) -> List[str]
+    scheme = distutils_scheme('', user=user, home=home, root=root,
+                              isolated=isolated, prefix=prefix)
+    return [scheme['purelib'], scheme['platlib']]
+
+
+def site_packages_writable(root, isolated):
+    # type: (Optional[str], bool) -> bool
+    return all(
+        test_writable_dir(d) for d in set(
+            get_lib_location_guesses(root=root, isolated=isolated))
+    )
+
+
+def decide_user_install(
+    use_user_site,  # type: Optional[bool]
+    prefix_path=None,  # type: Optional[str]
+    target_dir=None,  # type: Optional[str]
+    root_path=None,  # type: Optional[str]
+    isolated_mode=False,  # type: bool
+):
+    # type: (...) -> bool
+    """Determine whether to do a user install based on the input options.
+
+    If use_user_site is False, no additional checks are done.
+    If use_user_site is True, it is checked for compatibility with other
+    options.
+    If use_user_site is None, the default behaviour depends on the environment,
+    which is provided by the other arguments.
+    """
+    # In some cases (config from tox), use_user_site can be set to an integer
+    # rather than a bool, which 'use_user_site is False' wouldn't catch.
+    if (use_user_site is not None) and (not use_user_site):
+        logger.debug("Non-user install by explicit request")
+        return False
+
+    if use_user_site:
+        if prefix_path:
+            raise CommandError(
+                "Can not combine '--user' and '--prefix' as they imply "
+                "different installation locations"
+            )
+        if virtualenv_no_global():
+            raise InstallationError(
+                "Can not perform a '--user' install. User site-packages "
+                "are not visible in this virtualenv."
+            )
+        logger.debug("User install by explicit request")
+        return True
+
+    # If we are here, user installs have not been explicitly requested/avoided
+    assert use_user_site is None
+
+    # user install incompatible with --prefix/--target
+    if prefix_path or target_dir:
+        logger.debug("Non-user install due to --prefix or --target option")
+        return False
+
+    # If user installs are not enabled, choose a non-user install
+    if not site.ENABLE_USER_SITE:
+        logger.debug("Non-user install because user site-packages disabled")
+        return False
+
+    # If we have permission for a non-user install, do that,
+    # otherwise do a user install.
+    if site_packages_writable(root=root_path, isolated=isolated_mode):
+        logger.debug("Non-user install because site-packages writeable")
+        return False
+
+    logger.info("Defaulting to user installation because normal site-packages "
+                "is not writeable")
+    return True
+
+
+def reject_location_related_install_options(requirements, options):
+    # type: (List[InstallRequirement], Optional[List[str]]) -> None
+    """If any location-changing --install-option arguments were passed for
+    requirements or on the command-line, then show a deprecation warning.
+    """
+    def format_options(option_names):
+        # type: (Iterable[str]) -> List[str]
+        return ["--{}".format(name.replace("_", "-")) for name in option_names]
+
+    offenders = []
+
+    for requirement in requirements:
+        install_options = requirement.install_options
+        location_options = parse_distutils_args(install_options)
+        if location_options:
+            offenders.append(
+                "{!r} from {}".format(
+                    format_options(location_options.keys()), requirement
+                )
+            )
+
+    if options:
+        location_options = parse_distutils_args(options)
+        if location_options:
+            offenders.append(
+                "{!r} from command line".format(
+                    format_options(location_options.keys())
+                )
+            )
+
+    if not offenders:
+        return
+
+    raise CommandError(
+        "Location-changing options found in --install-option: {}."
+        " This is unsupported, use pip-level options like --user,"
+        " --prefix, --root, and --target instead.".format(
+            "; ".join(offenders)
+        )
+    )
+
+
+def create_env_error_message(error, show_traceback, using_user_site):
+    # type: (EnvironmentError, bool, bool) -> str
+    """Format an error message for an EnvironmentError
+
+    It may occur anytime during the execution of the install command.
+    """
+    parts = []
+
+    # Mention the error if we are not going to show a traceback
+    parts.append("Could not install packages due to an EnvironmentError")
+    if not show_traceback:
+        parts.append(": ")
+        parts.append(str(error))
+    else:
+        parts.append(".")
+
+    # Spilt the error indication from a helper message (if any)
+    parts[-1] += "\n"
+
+    # Suggest useful actions to the user:
+    #  (1) using user site-packages or (2) verifying the permissions
+    if error.errno == errno.EACCES:
+        user_option_part = "Consider using the `--user` option"
+        permissions_part = "Check the permissions"
+
+        if not using_user_site:
+            parts.extend([
+                user_option_part, " or ",
+                permissions_part.lower(),
+            ])
+        else:
+            parts.append(permissions_part)
+        parts.append(".\n")
+
+    return "".join(parts).strip() + "\n"
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/list.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/list.py
new file mode 100644
index 0000000..20e9bff
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/list.py
@@ -0,0 +1,320 @@
+from __future__ import absolute_import
+
+import json
+import logging
+
+from pip._vendor import six
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.req_command import IndexGroupCommand
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.exceptions import CommandError
+from pip._internal.index.collector import LinkCollector
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.utils.misc import (
+    dist_is_editable,
+    get_installed_distributions,
+    tabulate,
+    write_output,
+)
+from pip._internal.utils.packaging import get_installer
+from pip._internal.utils.parallel import map_multithread
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import List, Set, Tuple, Iterator
+
+    from pip._internal.network.session import PipSession
+    from pip._vendor.pkg_resources import Distribution
+
+logger = logging.getLogger(__name__)
+
+
+class ListCommand(IndexGroupCommand):
+    """
+    List installed packages, including editables.
+
+    Packages are listed in a case-insensitive sorted order.
+    """
+
+    ignore_require_venv = True
+    usage = """
+      %prog [options]"""
+
+    def add_options(self):
+        # type: () -> None
+        self.cmd_opts.add_option(
+            '-o', '--outdated',
+            action='store_true',
+            default=False,
+            help='List outdated packages')
+        self.cmd_opts.add_option(
+            '-u', '--uptodate',
+            action='store_true',
+            default=False,
+            help='List uptodate packages')
+        self.cmd_opts.add_option(
+            '-e', '--editable',
+            action='store_true',
+            default=False,
+            help='List editable projects.')
+        self.cmd_opts.add_option(
+            '-l', '--local',
+            action='store_true',
+            default=False,
+            help=('If in a virtualenv that has global access, do not list '
+                  'globally-installed packages.'),
+        )
+        self.cmd_opts.add_option(
+            '--user',
+            dest='user',
+            action='store_true',
+            default=False,
+            help='Only output packages installed in user-site.')
+        self.cmd_opts.add_option(cmdoptions.list_path())
+        self.cmd_opts.add_option(
+            '--pre',
+            action='store_true',
+            default=False,
+            help=("Include pre-release and development versions. By default, "
+                  "pip only finds stable versions."),
+        )
+
+        self.cmd_opts.add_option(
+            '--format',
+            action='store',
+            dest='list_format',
+            default="columns",
+            choices=('columns', 'freeze', 'json'),
+            help="Select the output format among: columns (default), freeze, "
+                 "or json",
+        )
+
+        self.cmd_opts.add_option(
+            '--not-required',
+            action='store_true',
+            dest='not_required',
+            help="List packages that are not dependencies of "
+                 "installed packages.",
+        )
+
+        self.cmd_opts.add_option(
+            '--exclude-editable',
+            action='store_false',
+            dest='include_editable',
+            help='Exclude editable package from output.',
+        )
+        self.cmd_opts.add_option(
+            '--include-editable',
+            action='store_true',
+            dest='include_editable',
+            help='Include editable package from output.',
+            default=True,
+        )
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group, self.parser
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def _build_package_finder(self, options, session):
+        # type: (Values, PipSession) -> PackageFinder
+        """
+        Create a package finder appropriate to this list command.
+        """
+        link_collector = LinkCollector.create(session, options=options)
+
+        # Pass allow_yanked=False to ignore yanked versions.
+        selection_prefs = SelectionPreferences(
+            allow_yanked=False,
+            allow_all_prereleases=options.pre,
+        )
+
+        return PackageFinder.create(
+            link_collector=link_collector,
+            selection_prefs=selection_prefs,
+        )
+
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        if options.outdated and options.uptodate:
+            raise CommandError(
+                "Options --outdated and --uptodate cannot be combined.")
+
+        cmdoptions.check_list_path_option(options)
+
+        packages = get_installed_distributions(
+            local_only=options.local,
+            user_only=options.user,
+            editables_only=options.editable,
+            include_editables=options.include_editable,
+            paths=options.path,
+        )
+
+        # get_not_required must be called firstly in order to find and
+        # filter out all dependencies correctly. Otherwise a package
+        # can't be identified as requirement because some parent packages
+        # could be filtered out before.
+        if options.not_required:
+            packages = self.get_not_required(packages, options)
+
+        if options.outdated:
+            packages = self.get_outdated(packages, options)
+        elif options.uptodate:
+            packages = self.get_uptodate(packages, options)
+
+        self.output_package_listing(packages, options)
+        return SUCCESS
+
+    def get_outdated(self, packages, options):
+        # type: (List[Distribution], Values) -> List[Distribution]
+        return [
+            dist for dist in self.iter_packages_latest_infos(packages, options)
+            if dist.latest_version > dist.parsed_version
+        ]
+
+    def get_uptodate(self, packages, options):
+        # type: (List[Distribution], Values) -> List[Distribution]
+        return [
+            dist for dist in self.iter_packages_latest_infos(packages, options)
+            if dist.latest_version == dist.parsed_version
+        ]
+
+    def get_not_required(self, packages, options):
+        # type: (List[Distribution], Values) -> List[Distribution]
+        dep_keys = set()  # type: Set[Distribution]
+        for dist in packages:
+            dep_keys.update(requirement.key for requirement in dist.requires())
+
+        # Create a set to remove duplicate packages, and cast it to a list
+        # to keep the return type consistent with get_outdated and
+        # get_uptodate
+        return list({pkg for pkg in packages if pkg.key not in dep_keys})
+
+    def iter_packages_latest_infos(self, packages, options):
+        # type: (List[Distribution], Values) -> Iterator[Distribution]
+        with self._build_session(options) as session:
+            finder = self._build_package_finder(options, session)
+
+            def latest_info(dist):
+                # type: (Distribution) -> Distribution
+                typ = 'unknown'
+                all_candidates = finder.find_all_candidates(dist.key)
+                if not options.pre:
+                    # Remove prereleases
+                    all_candidates = [candidate for candidate in all_candidates
+                                      if not candidate.version.is_prerelease]
+
+                evaluator = finder.make_candidate_evaluator(
+                    project_name=dist.project_name,
+                )
+                best_candidate = evaluator.sort_best_candidate(all_candidates)
+                if best_candidate is None:
+                    return None
+
+                remote_version = best_candidate.version
+                if best_candidate.link.is_wheel:
+                    typ = 'wheel'
+                else:
+                    typ = 'sdist'
+                # This is dirty but makes the rest of the code much cleaner
+                dist.latest_version = remote_version
+                dist.latest_filetype = typ
+                return dist
+
+            for dist in map_multithread(latest_info, packages):
+                if dist is not None:
+                    yield dist
+
+    def output_package_listing(self, packages, options):
+        # type: (List[Distribution], Values) -> None
+        packages = sorted(
+            packages,
+            key=lambda dist: dist.project_name.lower(),
+        )
+        if options.list_format == 'columns' and packages:
+            data, header = format_for_columns(packages, options)
+            self.output_package_listing_columns(data, header)
+        elif options.list_format == 'freeze':
+            for dist in packages:
+                if options.verbose >= 1:
+                    write_output("%s==%s (%s)", dist.project_name,
+                                 dist.version, dist.location)
+                else:
+                    write_output("%s==%s", dist.project_name, dist.version)
+        elif options.list_format == 'json':
+            write_output(format_for_json(packages, options))
+
+    def output_package_listing_columns(self, data, header):
+        # type: (List[List[str]], List[str]) -> None
+        # insert the header first: we need to know the size of column names
+        if len(data) > 0:
+            data.insert(0, header)
+
+        pkg_strings, sizes = tabulate(data)
+
+        # Create and add a separator.
+        if len(data) > 0:
+            pkg_strings.insert(1, " ".join(map(lambda x: '-' * x, sizes)))
+
+        for val in pkg_strings:
+            write_output(val)
+
+
+def format_for_columns(pkgs, options):
+    # type: (List[Distribution], Values) -> Tuple[List[List[str]], List[str]]
+    """
+    Convert the package data into something usable
+    by output_package_listing_columns.
+    """
+    running_outdated = options.outdated
+    # Adjust the header for the `pip list --outdated` case.
+    if running_outdated:
+        header = ["Package", "Version", "Latest", "Type"]
+    else:
+        header = ["Package", "Version"]
+
+    data = []
+    if options.verbose >= 1 or any(dist_is_editable(x) for x in pkgs):
+        header.append("Location")
+    if options.verbose >= 1:
+        header.append("Installer")
+
+    for proj in pkgs:
+        # if we're working on the 'outdated' list, separate out the
+        # latest_version and type
+        row = [proj.project_name, proj.version]
+
+        if running_outdated:
+            row.append(proj.latest_version)
+            row.append(proj.latest_filetype)
+
+        if options.verbose >= 1 or dist_is_editable(proj):
+            row.append(proj.location)
+        if options.verbose >= 1:
+            row.append(get_installer(proj))
+
+        data.append(row)
+
+    return data, header
+
+
+def format_for_json(packages, options):
+    # type: (List[Distribution], Values) -> str
+    data = []
+    for dist in packages:
+        info = {
+            'name': dist.project_name,
+            'version': six.text_type(dist.version),
+        }
+        if options.verbose >= 1:
+            info['location'] = dist.location
+            info['installer'] = get_installer(dist)
+        if options.outdated:
+            info['latest_version'] = six.text_type(dist.latest_version)
+            info['latest_filetype'] = dist.latest_filetype
+        data.append(info)
+    return json.dumps(data)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/search.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/search.py
new file mode 100644
index 0000000..ff09472
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/search.py
@@ -0,0 +1,160 @@
+from __future__ import absolute_import
+
+import logging
+import sys
+import textwrap
+from collections import OrderedDict
+
+from pip._vendor import pkg_resources
+from pip._vendor.packaging.version import parse as parse_version
+# NOTE: XMLRPC Client is not annotated in typeshed as on 2017-07-17, which is
+#       why we ignore the type on this import
+from pip._vendor.six.moves import xmlrpc_client  # type: ignore
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.req_command import SessionCommandMixin
+from pip._internal.cli.status_codes import NO_MATCHES_FOUND, SUCCESS
+from pip._internal.exceptions import CommandError
+from pip._internal.models.index import PyPI
+from pip._internal.network.xmlrpc import PipXmlrpcTransport
+from pip._internal.utils.compat import get_terminal_size
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import get_distribution, write_output
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import List, Dict, Optional
+    from typing_extensions import TypedDict
+    TransformedHit = TypedDict(
+        'TransformedHit',
+        {'name': str, 'summary': str, 'versions': List[str]},
+    )
+
+logger = logging.getLogger(__name__)
+
+
+class SearchCommand(Command, SessionCommandMixin):
+    """Search for PyPI packages whose name or summary contains <query>."""
+
+    usage = """
+      %prog [options] <query>"""
+    ignore_require_venv = True
+
+    def add_options(self):
+        # type: () -> None
+        self.cmd_opts.add_option(
+            '-i', '--index',
+            dest='index',
+            metavar='URL',
+            default=PyPI.pypi_url,
+            help='Base URL of Python Package Index (default %default)')
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        if not args:
+            raise CommandError('Missing required argument (search query).')
+        query = args
+        pypi_hits = self.search(query, options)
+        hits = transform_hits(pypi_hits)
+
+        terminal_width = None
+        if sys.stdout.isatty():
+            terminal_width = get_terminal_size()[0]
+
+        print_results(hits, terminal_width=terminal_width)
+        if pypi_hits:
+            return SUCCESS
+        return NO_MATCHES_FOUND
+
+    def search(self, query, options):
+        # type: (List[str], Values) -> List[Dict[str, str]]
+        index_url = options.index
+
+        session = self.get_default_session(options)
+
+        transport = PipXmlrpcTransport(index_url, session)
+        pypi = xmlrpc_client.ServerProxy(index_url, transport)
+        hits = pypi.search({'name': query, 'summary': query}, 'or')
+        return hits
+
+
+def transform_hits(hits):
+    # type: (List[Dict[str, str]]) -> List[TransformedHit]
+    """
+    The list from pypi is really a list of versions. We want a list of
+    packages with the list of versions stored inline. This converts the
+    list from pypi into one we can use.
+    """
+    packages = OrderedDict()  # type: OrderedDict[str, TransformedHit]
+    for hit in hits:
+        name = hit['name']
+        summary = hit['summary']
+        version = hit['version']
+
+        if name not in packages.keys():
+            packages[name] = {
+                'name': name,
+                'summary': summary,
+                'versions': [version],
+            }
+        else:
+            packages[name]['versions'].append(version)
+
+            # if this is the highest version, replace summary and score
+            if version == highest_version(packages[name]['versions']):
+                packages[name]['summary'] = summary
+
+    return list(packages.values())
+
+
+def print_results(hits, name_column_width=None, terminal_width=None):
+    # type: (List[TransformedHit], Optional[int], Optional[int]) -> None
+    if not hits:
+        return
+    if name_column_width is None:
+        name_column_width = max([
+            len(hit['name']) + len(highest_version(hit.get('versions', ['-'])))
+            for hit in hits
+        ]) + 4
+
+    installed_packages = [p.project_name for p in pkg_resources.working_set]
+    for hit in hits:
+        name = hit['name']
+        summary = hit['summary'] or ''
+        latest = highest_version(hit.get('versions', ['-']))
+        if terminal_width is not None:
+            target_width = terminal_width - name_column_width - 5
+            if target_width > 10:
+                # wrap and indent summary to fit terminal
+                summary_lines = textwrap.wrap(summary, target_width)
+                summary = ('\n' + ' ' * (name_column_width + 3)).join(
+                    summary_lines)
+
+        line = '{name_latest:{name_column_width}} - {summary}'.format(
+            name_latest='{name} ({latest})'.format(**locals()),
+            **locals())
+        try:
+            write_output(line)
+            if name in installed_packages:
+                dist = get_distribution(name)
+                assert dist is not None
+                with indent_log():
+                    if dist.version == latest:
+                        write_output('INSTALLED: %s (latest)', dist.version)
+                    else:
+                        write_output('INSTALLED: %s', dist.version)
+                        if parse_version(latest).pre:
+                            write_output('LATEST:    %s (pre-release; install'
+                                         ' with "pip install --pre")', latest)
+                        else:
+                            write_output('LATEST:    %s', latest)
+        except UnicodeEncodeError:
+            pass
+
+
+def highest_version(versions):
+    # type: (List[str]) -> str
+    return max(versions, key=parse_version)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/show.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/show.py
new file mode 100644
index 0000000..3892c59
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/show.py
@@ -0,0 +1,186 @@
+from __future__ import absolute_import
+
+import logging
+import os
+from email.parser import FeedParser
+
+from pip._vendor import pkg_resources
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.utils.misc import write_output
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import List, Dict, Iterator
+
+logger = logging.getLogger(__name__)
+
+
+class ShowCommand(Command):
+    """
+    Show information about one or more installed packages.
+
+    The output is in RFC-compliant mail header format.
+    """
+
+    usage = """
+      %prog [options] <package> ..."""
+    ignore_require_venv = True
+
+    def add_options(self):
+        # type: () -> None
+        self.cmd_opts.add_option(
+            '-f', '--files',
+            dest='files',
+            action='store_true',
+            default=False,
+            help='Show the full list of installed files for each package.')
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        if not args:
+            logger.warning('ERROR: Please provide a package name or names.')
+            return ERROR
+        query = args
+
+        results = search_packages_info(query)
+        if not print_results(
+                results, list_files=options.files, verbose=options.verbose):
+            return ERROR
+        return SUCCESS
+
+
+def search_packages_info(query):
+    # type: (List[str]) -> Iterator[Dict[str, str]]
+    """
+    Gather details from installed distributions. Print distribution name,
+    version, location, and installed files. Installed files requires a
+    pip generated 'installed-files.txt' in the distributions '.egg-info'
+    directory.
+    """
+    installed = {}
+    for p in pkg_resources.working_set:
+        installed[canonicalize_name(p.project_name)] = p
+
+    query_names = [canonicalize_name(name) for name in query]
+    missing = sorted(
+        [name for name, pkg in zip(query, query_names) if pkg not in installed]
+    )
+    if missing:
+        logger.warning('Package(s) not found: %s', ', '.join(missing))
+
+    def get_requiring_packages(package_name):
+        # type: (str) -> List[str]
+        canonical_name = canonicalize_name(package_name)
+        return [
+            pkg.project_name for pkg in pkg_resources.working_set
+            if canonical_name in
+               [canonicalize_name(required.name) for required in
+                pkg.requires()]
+        ]
+
+    for dist in [installed[pkg] for pkg in query_names if pkg in installed]:
+        package = {
+            'name': dist.project_name,
+            'version': dist.version,
+            'location': dist.location,
+            'requires': [dep.project_name for dep in dist.requires()],
+            'required_by': get_requiring_packages(dist.project_name)
+        }
+        file_list = None
+        metadata = ''
+        if isinstance(dist, pkg_resources.DistInfoDistribution):
+            # RECORDs should be part of .dist-info metadatas
+            if dist.has_metadata('RECORD'):
+                lines = dist.get_metadata_lines('RECORD')
+                paths = [line.split(',')[0] for line in lines]
+                paths = [os.path.join(dist.location, p) for p in paths]
+                file_list = [os.path.relpath(p, dist.location) for p in paths]
+
+            if dist.has_metadata('METADATA'):
+                metadata = dist.get_metadata('METADATA')
+        else:
+            # Otherwise use pip's log for .egg-info's
+            if dist.has_metadata('installed-files.txt'):
+                paths = dist.get_metadata_lines('installed-files.txt')
+                paths = [os.path.join(dist.egg_info, p) for p in paths]
+                file_list = [os.path.relpath(p, dist.location) for p in paths]
+
+            if dist.has_metadata('PKG-INFO'):
+                metadata = dist.get_metadata('PKG-INFO')
+
+        if dist.has_metadata('entry_points.txt'):
+            entry_points = dist.get_metadata_lines('entry_points.txt')
+            package['entry_points'] = entry_points
+
+        if dist.has_metadata('INSTALLER'):
+            for line in dist.get_metadata_lines('INSTALLER'):
+                if line.strip():
+                    package['installer'] = line.strip()
+                    break
+
+        # @todo: Should pkg_resources.Distribution have a
+        # `get_pkg_info` method?
+        feed_parser = FeedParser()
+        feed_parser.feed(metadata)
+        pkg_info_dict = feed_parser.close()
+        for key in ('metadata-version', 'summary',
+                    'home-page', 'author', 'author-email', 'license'):
+            package[key] = pkg_info_dict.get(key)
+
+        # It looks like FeedParser cannot deal with repeated headers
+        classifiers = []
+        for line in metadata.splitlines():
+            if line.startswith('Classifier: '):
+                classifiers.append(line[len('Classifier: '):])
+        package['classifiers'] = classifiers
+
+        if file_list:
+            package['files'] = sorted(file_list)
+        yield package
+
+
+def print_results(distributions, list_files=False, verbose=False):
+    # type: (Iterator[Dict[str, str]], bool, bool) -> bool
+    """
+    Print the information from installed distributions found.
+    """
+    results_printed = False
+    for i, dist in enumerate(distributions):
+        results_printed = True
+        if i > 0:
+            write_output("---")
+
+        write_output("Name: %s", dist.get('name', ''))
+        write_output("Version: %s", dist.get('version', ''))
+        write_output("Summary: %s", dist.get('summary', ''))
+        write_output("Home-page: %s", dist.get('home-page', ''))
+        write_output("Author: %s", dist.get('author', ''))
+        write_output("Author-email: %s", dist.get('author-email', ''))
+        write_output("License: %s", dist.get('license', ''))
+        write_output("Location: %s", dist.get('location', ''))
+        write_output("Requires: %s", ', '.join(dist.get('requires', [])))
+        write_output("Required-by: %s", ', '.join(dist.get('required_by', [])))
+
+        if verbose:
+            write_output("Metadata-Version: %s",
+                         dist.get('metadata-version', ''))
+            write_output("Installer: %s", dist.get('installer', ''))
+            write_output("Classifiers:")
+            for classifier in dist.get('classifiers', []):
+                write_output("  %s", classifier)
+            write_output("Entry-points:")
+            for entry in dist.get('entry_points', []):
+                write_output("  %s", entry.strip())
+        if list_files:
+            write_output("Files:")
+            for line in dist.get('files', []):
+                write_output("  %s", line.strip())
+            if "files" not in dist:
+                write_output("Cannot locate installed-files.txt")
+    return results_printed
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/uninstall.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/uninstall.py
new file mode 100644
index 0000000..3371fe4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/uninstall.py
@@ -0,0 +1,95 @@
+from __future__ import absolute_import
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.req_command import SessionCommandMixin
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.exceptions import InstallationError
+from pip._internal.req import parse_requirements
+from pip._internal.req.constructors import (
+    install_req_from_line,
+    install_req_from_parsed_requirement,
+)
+from pip._internal.utils.misc import protect_pip_from_modification_on_windows
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import List
+
+
+class UninstallCommand(Command, SessionCommandMixin):
+    """
+    Uninstall packages.
+
+    pip is able to uninstall most installed packages. Known exceptions are:
+
+    - Pure distutils packages installed with ``python setup.py install``, which
+      leave behind no metadata to determine what files were installed.
+    - Script wrappers installed by ``python setup.py develop``.
+    """
+
+    usage = """
+      %prog [options] <package> ...
+      %prog [options] -r <requirements file> ..."""
+
+    def add_options(self):
+        # type: () -> None
+        self.cmd_opts.add_option(
+            '-r', '--requirement',
+            dest='requirements',
+            action='append',
+            default=[],
+            metavar='file',
+            help='Uninstall all the packages listed in the given requirements '
+                 'file.  This option can be used multiple times.',
+        )
+        self.cmd_opts.add_option(
+            '-y', '--yes',
+            dest='yes',
+            action='store_true',
+            help="Don't ask for confirmation of uninstall deletions.")
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        session = self.get_default_session(options)
+
+        reqs_to_uninstall = {}
+        for name in args:
+            req = install_req_from_line(
+                name, isolated=options.isolated_mode,
+            )
+            if req.name:
+                reqs_to_uninstall[canonicalize_name(req.name)] = req
+        for filename in options.requirements:
+            for parsed_req in parse_requirements(
+                    filename,
+                    options=options,
+                    session=session):
+                req = install_req_from_parsed_requirement(
+                    parsed_req,
+                    isolated=options.isolated_mode
+                )
+                if req.name:
+                    reqs_to_uninstall[canonicalize_name(req.name)] = req
+        if not reqs_to_uninstall:
+            raise InstallationError(
+                'You must give at least one requirement to {self.name} (see '
+                '"pip help {self.name}")'.format(**locals())
+            )
+
+        protect_pip_from_modification_on_windows(
+            modifying_pip="pip" in reqs_to_uninstall
+        )
+
+        for req in reqs_to_uninstall.values():
+            uninstall_pathset = req.uninstall(
+                auto_confirm=options.yes, verbose=self.verbosity > 0,
+            )
+            if uninstall_pathset:
+                uninstall_pathset.commit()
+
+        return SUCCESS
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/wheel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/wheel.py
new file mode 100644
index 0000000..0f71856
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/commands/wheel.py
@@ -0,0 +1,188 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import absolute_import
+
+import logging
+import os
+import shutil
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.req_command import RequirementCommand, with_cleanup
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.exceptions import CommandError
+from pip._internal.req.req_tracker import get_requirement_tracker
+from pip._internal.utils.misc import ensure_dir, normalize_path
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.wheel_builder import build, should_build_for_wheel_command
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import List
+
+
+logger = logging.getLogger(__name__)
+
+
+class WheelCommand(RequirementCommand):
+    """
+    Build Wheel archives for your requirements and dependencies.
+
+    Wheel is a built-package format, and offers the advantage of not
+    recompiling your software during every install. For more details, see the
+    wheel docs: https://wheel.readthedocs.io/en/latest/
+
+    Requirements: setuptools>=0.8, and wheel.
+
+    'pip wheel' uses the bdist_wheel setuptools extension from the wheel
+    package to build individual wheels.
+
+    """
+
+    usage = """
+      %prog [options] <requirement specifier> ...
+      %prog [options] -r <requirements file> ...
+      %prog [options] [-e] <vcs project url> ...
+      %prog [options] [-e] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    def add_options(self):
+        # type: () -> None
+
+        self.cmd_opts.add_option(
+            '-w', '--wheel-dir',
+            dest='wheel_dir',
+            metavar='dir',
+            default=os.curdir,
+            help=("Build wheels into <dir>, where the default is the "
+                  "current working directory."),
+        )
+        self.cmd_opts.add_option(cmdoptions.no_binary())
+        self.cmd_opts.add_option(cmdoptions.only_binary())
+        self.cmd_opts.add_option(cmdoptions.prefer_binary())
+        self.cmd_opts.add_option(
+            '--build-option',
+            dest='build_options',
+            metavar='options',
+            action='append',
+            help="Extra arguments to be supplied to 'setup.py bdist_wheel'.",
+        )
+        self.cmd_opts.add_option(cmdoptions.no_build_isolation())
+        self.cmd_opts.add_option(cmdoptions.use_pep517())
+        self.cmd_opts.add_option(cmdoptions.no_use_pep517())
+        self.cmd_opts.add_option(cmdoptions.constraints())
+        self.cmd_opts.add_option(cmdoptions.editable())
+        self.cmd_opts.add_option(cmdoptions.requirements())
+        self.cmd_opts.add_option(cmdoptions.src())
+        self.cmd_opts.add_option(cmdoptions.ignore_requires_python())
+        self.cmd_opts.add_option(cmdoptions.no_deps())
+        self.cmd_opts.add_option(cmdoptions.build_dir())
+        self.cmd_opts.add_option(cmdoptions.progress_bar())
+
+        self.cmd_opts.add_option(
+            '--global-option',
+            dest='global_options',
+            action='append',
+            metavar='options',
+            help="Extra global options to be supplied to the setup.py "
+            "call before the 'bdist_wheel' command.")
+
+        self.cmd_opts.add_option(
+            '--pre',
+            action='store_true',
+            default=False,
+            help=("Include pre-release and development versions. By default, "
+                  "pip only finds stable versions."),
+        )
+
+        self.cmd_opts.add_option(cmdoptions.require_hashes())
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    @with_cleanup
+    def run(self, options, args):
+        # type: (Values, List[str]) -> int
+        cmdoptions.check_install_build_global(options)
+
+        session = self.get_default_session(options)
+
+        finder = self._build_package_finder(options, session)
+        build_delete = (not (options.no_clean or options.build_dir))
+        wheel_cache = WheelCache(options.cache_dir, options.format_control)
+
+        options.wheel_dir = normalize_path(options.wheel_dir)
+        ensure_dir(options.wheel_dir)
+
+        req_tracker = self.enter_context(get_requirement_tracker())
+
+        directory = TempDirectory(
+            options.build_dir,
+            delete=build_delete,
+            kind="wheel",
+            globally_managed=True,
+        )
+
+        reqs = self.get_requirements(args, options, finder, session)
+
+        preparer = self.make_requirement_preparer(
+            temp_build_dir=directory,
+            options=options,
+            req_tracker=req_tracker,
+            session=session,
+            finder=finder,
+            wheel_download_dir=options.wheel_dir,
+            use_user_site=False,
+        )
+
+        resolver = self.make_resolver(
+            preparer=preparer,
+            finder=finder,
+            options=options,
+            wheel_cache=wheel_cache,
+            ignore_requires_python=options.ignore_requires_python,
+            use_pep517=options.use_pep517,
+        )
+
+        self.trace_basic_info(finder)
+
+        requirement_set = resolver.resolve(
+            reqs, check_supported_wheels=True
+        )
+
+        reqs_to_build = [
+            r for r in requirement_set.requirements.values()
+            if should_build_for_wheel_command(r)
+        ]
+
+        # build wheels
+        build_successes, build_failures = build(
+            reqs_to_build,
+            wheel_cache=wheel_cache,
+            build_options=options.build_options or [],
+            global_options=options.global_options or [],
+        )
+        for req in build_successes:
+            assert req.link and req.link.is_wheel
+            assert req.local_file_path
+            # copy from cache to target directory
+            try:
+                shutil.copy(req.local_file_path, options.wheel_dir)
+            except OSError as e:
+                logger.warning(
+                    "Building wheel for %s failed: %s",
+                    req.name, e,
+                )
+                build_failures.append(req)
+        if len(build_failures) != 0:
+            raise CommandError(
+                "Failed to build one or more wheels"
+            )
+
+        return SUCCESS
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/configuration.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/configuration.py
new file mode 100644
index 0000000..e49a5f4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/configuration.py
@@ -0,0 +1,418 @@
+"""Configuration management setup
+
+Some terminology:
+- name
+  As written in config files.
+- value
+  Value associated with a name
+- key
+  Name combined with it's section (section.name)
+- variant
+  A single word describing where the configuration key-value pair came from
+"""
+
+import locale
+import logging
+import os
+import sys
+
+from pip._vendor.six.moves import configparser
+
+from pip._internal.exceptions import (
+    ConfigurationError,
+    ConfigurationFileCouldNotBeLoaded,
+)
+from pip._internal.utils import appdirs
+from pip._internal.utils.compat import WINDOWS, expanduser
+from pip._internal.utils.misc import ensure_dir, enum
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Dict, Iterable, List, NewType, Optional, Tuple
+    )
+
+    RawConfigParser = configparser.RawConfigParser  # Shorthand
+    Kind = NewType("Kind", str)
+
+logger = logging.getLogger(__name__)
+
+
+# NOTE: Maybe use the optionx attribute to normalize keynames.
+def _normalize_name(name):
+    # type: (str) -> str
+    """Make a name consistent regardless of source (environment or file)
+    """
+    name = name.lower().replace('_', '-')
+    if name.startswith('--'):
+        name = name[2:]  # only prefer long opts
+    return name
+
+
+def _disassemble_key(name):
+    # type: (str) -> List[str]
+    if "." not in name:
+        error_message = (
+            "Key does not contain dot separated section and key. "
+            "Perhaps you wanted to use 'global.{}' instead?"
+        ).format(name)
+        raise ConfigurationError(error_message)
+    return name.split(".", 1)
+
+
+# The kinds of configurations there are.
+kinds = enum(
+    USER="user",        # User Specific
+    GLOBAL="global",    # System Wide
+    SITE="site",        # [Virtual] Environment Specific
+    ENV="env",          # from PIP_CONFIG_FILE
+    ENV_VAR="env-var",  # from Environment Variables
+)
+
+
+CONFIG_BASENAME = 'pip.ini' if WINDOWS else 'pip.conf'
+
+
+def get_configuration_files():
+    # type: () -> Dict[Kind, List[str]]
+    global_config_files = [
+        os.path.join(path, CONFIG_BASENAME)
+        for path in appdirs.site_config_dirs('pip')
+    ]
+
+    site_config_file = os.path.join(sys.prefix, CONFIG_BASENAME)
+    legacy_config_file = os.path.join(
+        expanduser('~'),
+        'pip' if WINDOWS else '.pip',
+        CONFIG_BASENAME,
+    )
+    new_config_file = os.path.join(
+        appdirs.user_config_dir("pip"), CONFIG_BASENAME
+    )
+    return {
+        kinds.GLOBAL: global_config_files,
+        kinds.SITE: [site_config_file],
+        kinds.USER: [legacy_config_file, new_config_file],
+    }
+
+
+class Configuration(object):
+    """Handles management of configuration.
+
+    Provides an interface to accessing and managing configuration files.
+
+    This class converts provides an API that takes "section.key-name" style
+    keys and stores the value associated with it as "key-name" under the
+    section "section".
+
+    This allows for a clean interface wherein the both the section and the
+    key-name are preserved in an easy to manage form in the configuration files
+    and the data stored is also nice.
+    """
+
+    def __init__(self, isolated, load_only=None):
+        # type: (bool, Optional[Kind]) -> None
+        super(Configuration, self).__init__()
+
+        _valid_load_only = [kinds.USER, kinds.GLOBAL, kinds.SITE, None]
+        if load_only not in _valid_load_only:
+            raise ConfigurationError(
+                "Got invalid value for load_only - should be one of {}".format(
+                    ", ".join(map(repr, _valid_load_only[:-1]))
+                )
+            )
+        self.isolated = isolated
+        self.load_only = load_only
+
+        # The order here determines the override order.
+        self._override_order = [
+            kinds.GLOBAL, kinds.USER, kinds.SITE, kinds.ENV, kinds.ENV_VAR
+        ]
+
+        self._ignore_env_names = ["version", "help"]
+
+        # Because we keep track of where we got the data from
+        self._parsers = {
+            variant: [] for variant in self._override_order
+        }  # type: Dict[Kind, List[Tuple[str, RawConfigParser]]]
+        self._config = {
+            variant: {} for variant in self._override_order
+        }  # type: Dict[Kind, Dict[str, Any]]
+        self._modified_parsers = []  # type: List[Tuple[str, RawConfigParser]]
+
+    def load(self):
+        # type: () -> None
+        """Loads configuration from configuration files and environment
+        """
+        self._load_config_files()
+        if not self.isolated:
+            self._load_environment_vars()
+
+    def get_file_to_edit(self):
+        # type: () -> Optional[str]
+        """Returns the file with highest priority in configuration
+        """
+        assert self.load_only is not None, \
+            "Need to be specified a file to be editing"
+
+        try:
+            return self._get_parser_to_modify()[0]
+        except IndexError:
+            return None
+
+    def items(self):
+        # type: () -> Iterable[Tuple[str, Any]]
+        """Returns key-value pairs like dict.items() representing the loaded
+        configuration
+        """
+        return self._dictionary.items()
+
+    def get_value(self, key):
+        # type: (str) -> Any
+        """Get a value from the configuration.
+        """
+        try:
+            return self._dictionary[key]
+        except KeyError:
+            raise ConfigurationError("No such key - {}".format(key))
+
+    def set_value(self, key, value):
+        # type: (str, Any) -> None
+        """Modify a value in the configuration.
+        """
+        self._ensure_have_load_only()
+
+        assert self.load_only
+        fname, parser = self._get_parser_to_modify()
+
+        if parser is not None:
+            section, name = _disassemble_key(key)
+
+            # Modify the parser and the configuration
+            if not parser.has_section(section):
+                parser.add_section(section)
+            parser.set(section, name, value)
+
+        self._config[self.load_only][key] = value
+        self._mark_as_modified(fname, parser)
+
+    def unset_value(self, key):
+        # type: (str) -> None
+        """Unset a value in the configuration."""
+        self._ensure_have_load_only()
+
+        assert self.load_only
+        if key not in self._config[self.load_only]:
+            raise ConfigurationError("No such key - {}".format(key))
+
+        fname, parser = self._get_parser_to_modify()
+
+        if parser is not None:
+            section, name = _disassemble_key(key)
+            if not (parser.has_section(section)
+                    and parser.remove_option(section, name)):
+                # The option was not removed.
+                raise ConfigurationError(
+                    "Fatal Internal error [id=1]. Please report as a bug."
+                )
+
+            # The section may be empty after the option was removed.
+            if not parser.items(section):
+                parser.remove_section(section)
+            self._mark_as_modified(fname, parser)
+
+        del self._config[self.load_only][key]
+
+    def save(self):
+        # type: () -> None
+        """Save the current in-memory state.
+        """
+        self._ensure_have_load_only()
+
+        for fname, parser in self._modified_parsers:
+            logger.info("Writing to %s", fname)
+
+            # Ensure directory exists.
+            ensure_dir(os.path.dirname(fname))
+
+            with open(fname, "w") as f:
+                parser.write(f)
+
+    #
+    # Private routines
+    #
+
+    def _ensure_have_load_only(self):
+        # type: () -> None
+        if self.load_only is None:
+            raise ConfigurationError("Needed a specific file to be modifying.")
+        logger.debug("Will be working with %s variant only", self.load_only)
+
+    @property
+    def _dictionary(self):
+        # type: () -> Dict[str, Any]
+        """A dictionary representing the loaded configuration.
+        """
+        # NOTE: Dictionaries are not populated if not loaded. So, conditionals
+        #       are not needed here.
+        retval = {}
+
+        for variant in self._override_order:
+            retval.update(self._config[variant])
+
+        return retval
+
+    def _load_config_files(self):
+        # type: () -> None
+        """Loads configuration from configuration files
+        """
+        config_files = dict(self.iter_config_files())
+        if config_files[kinds.ENV][0:1] == [os.devnull]:
+            logger.debug(
+                "Skipping loading configuration files due to "
+                "environment's PIP_CONFIG_FILE being os.devnull"
+            )
+            return
+
+        for variant, files in config_files.items():
+            for fname in files:
+                # If there's specific variant set in `load_only`, load only
+                # that variant, not the others.
+                if self.load_only is not None and variant != self.load_only:
+                    logger.debug(
+                        "Skipping file '%s' (variant: %s)", fname, variant
+                    )
+                    continue
+
+                parser = self._load_file(variant, fname)
+
+                # Keeping track of the parsers used
+                self._parsers[variant].append((fname, parser))
+
+    def _load_file(self, variant, fname):
+        # type: (Kind, str) -> RawConfigParser
+        logger.debug("For variant '%s', will try loading '%s'", variant, fname)
+        parser = self._construct_parser(fname)
+
+        for section in parser.sections():
+            items = parser.items(section)
+            self._config[variant].update(self._normalized_keys(section, items))
+
+        return parser
+
+    def _construct_parser(self, fname):
+        # type: (str) -> RawConfigParser
+        parser = configparser.RawConfigParser()
+        # If there is no such file, don't bother reading it but create the
+        # parser anyway, to hold the data.
+        # Doing this is useful when modifying and saving files, where we don't
+        # need to construct a parser.
+        if os.path.exists(fname):
+            try:
+                parser.read(fname)
+            except UnicodeDecodeError:
+                # See https://github.com/pypa/pip/issues/4963
+                raise ConfigurationFileCouldNotBeLoaded(
+                    reason="contains invalid {} characters".format(
+                        locale.getpreferredencoding(False)
+                    ),
+                    fname=fname,
+                )
+            except configparser.Error as error:
+                # See https://github.com/pypa/pip/issues/4893
+                raise ConfigurationFileCouldNotBeLoaded(error=error)
+        return parser
+
+    def _load_environment_vars(self):
+        # type: () -> None
+        """Loads configuration from environment variables
+        """
+        self._config[kinds.ENV_VAR].update(
+            self._normalized_keys(":env:", self.get_environ_vars())
+        )
+
+    def _normalized_keys(self, section, items):
+        # type: (str, Iterable[Tuple[str, Any]]) -> Dict[str, Any]
+        """Normalizes items to construct a dictionary with normalized keys.
+
+        This routine is where the names become keys and are made the same
+        regardless of source - configuration files or environment.
+        """
+        normalized = {}
+        for name, val in items:
+            key = section + "." + _normalize_name(name)
+            normalized[key] = val
+        return normalized
+
+    def get_environ_vars(self):
+        # type: () -> Iterable[Tuple[str, str]]
+        """Returns a generator with all environmental vars with prefix PIP_"""
+        for key, val in os.environ.items():
+            should_be_yielded = (
+                key.startswith("PIP_") and
+                key[4:].lower() not in self._ignore_env_names
+            )
+            if should_be_yielded:
+                yield key[4:].lower(), val
+
+    # XXX: This is patched in the tests.
+    def iter_config_files(self):
+        # type: () -> Iterable[Tuple[Kind, List[str]]]
+        """Yields variant and configuration files associated with it.
+
+        This should be treated like items of a dictionary.
+        """
+        # SMELL: Move the conditions out of this function
+
+        # environment variables have the lowest priority
+        config_file = os.environ.get('PIP_CONFIG_FILE', None)
+        if config_file is not None:
+            yield kinds.ENV, [config_file]
+        else:
+            yield kinds.ENV, []
+
+        config_files = get_configuration_files()
+
+        # at the base we have any global configuration
+        yield kinds.GLOBAL, config_files[kinds.GLOBAL]
+
+        # per-user configuration next
+        should_load_user_config = not self.isolated and not (
+            config_file and os.path.exists(config_file)
+        )
+        if should_load_user_config:
+            # The legacy config file is overridden by the new config file
+            yield kinds.USER, config_files[kinds.USER]
+
+        # finally virtualenv configuration first trumping others
+        yield kinds.SITE, config_files[kinds.SITE]
+
+    def get_values_in_config(self, variant):
+        # type: (Kind) -> Dict[str, Any]
+        """Get values present in a config file"""
+        return self._config[variant]
+
+    def _get_parser_to_modify(self):
+        # type: () -> Tuple[str, RawConfigParser]
+        # Determine which parser to modify
+        assert self.load_only
+        parsers = self._parsers[self.load_only]
+        if not parsers:
+            # This should not happen if everything works correctly.
+            raise ConfigurationError(
+                "Fatal Internal error [id=2]. Please report as a bug."
+            )
+
+        # Use the highest priority parser.
+        return parsers[-1]
+
+    # XXX: This is patched in the tests.
+    def _mark_as_modified(self, fname, parser):
+        # type: (str, RawConfigParser) -> None
+        file_parser_tuple = (fname, parser)
+        if file_parser_tuple not in self._modified_parsers:
+            self._modified_parsers.append(file_parser_tuple)
+
+    def __repr__(self):
+        # type: () -> str
+        return "{}({!r})".format(self.__class__.__name__, self._dictionary)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/__init__.py
new file mode 100644
index 0000000..d5c1afc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/__init__.py
@@ -0,0 +1,24 @@
+from pip._internal.distributions.sdist import SourceDistribution
+from pip._internal.distributions.wheel import WheelDistribution
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from pip._internal.distributions.base import AbstractDistribution
+    from pip._internal.req.req_install import InstallRequirement
+
+
+def make_distribution_for_install_requirement(install_req):
+    # type: (InstallRequirement) -> AbstractDistribution
+    """Returns a Distribution for the given InstallRequirement
+    """
+    # Editable requirements will always be source distributions. They use the
+    # legacy logic until we create a modern standard for them.
+    if install_req.editable:
+        return SourceDistribution(install_req)
+
+    # If it's a wheel, it's a WheelDistribution
+    if install_req.is_wheel:
+        return WheelDistribution(install_req)
+
+    # Otherwise, a SourceDistribution
+    return SourceDistribution(install_req)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/base.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/base.py
new file mode 100644
index 0000000..b836b98
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/base.py
@@ -0,0 +1,45 @@
+import abc
+
+from pip._vendor.six import add_metaclass
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional
+
+    from pip._vendor.pkg_resources import Distribution
+    from pip._internal.req import InstallRequirement
+    from pip._internal.index.package_finder import PackageFinder
+
+
+@add_metaclass(abc.ABCMeta)
+class AbstractDistribution(object):
+    """A base class for handling installable artifacts.
+
+    The requirements for anything installable are as follows:
+
+     - we must be able to determine the requirement name
+       (or we can't correctly handle the non-upgrade case).
+
+     - for packages with setup requirements, we must also be able
+       to determine their requirements without installing additional
+       packages (for the same reason as run-time dependencies)
+
+     - we must be able to create a Distribution object exposing the
+       above metadata.
+    """
+
+    def __init__(self, req):
+        # type: (InstallRequirement) -> None
+        super(AbstractDistribution, self).__init__()
+        self.req = req
+
+    @abc.abstractmethod
+    def get_pkg_resources_distribution(self):
+        # type: () -> Optional[Distribution]
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def prepare_distribution_metadata(self, finder, build_isolation):
+        # type: (PackageFinder, bool) -> None
+        raise NotImplementedError()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/installed.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/installed.py
new file mode 100644
index 0000000..0d15bf4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/installed.py
@@ -0,0 +1,24 @@
+from pip._internal.distributions.base import AbstractDistribution
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional
+
+    from pip._vendor.pkg_resources import Distribution
+    from pip._internal.index.package_finder import PackageFinder
+
+
+class InstalledDistribution(AbstractDistribution):
+    """Represents an installed package.
+
+    This does not need any preparation as the required information has already
+    been computed.
+    """
+
+    def get_pkg_resources_distribution(self):
+        # type: () -> Optional[Distribution]
+        return self.req.satisfied_by
+
+    def prepare_distribution_metadata(self, finder, build_isolation):
+        # type: (PackageFinder, bool) -> None
+        pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/sdist.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/sdist.py
new file mode 100644
index 0000000..be3d7d9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/sdist.py
@@ -0,0 +1,104 @@
+import logging
+
+from pip._internal.build_env import BuildEnvironment
+from pip._internal.distributions.base import AbstractDistribution
+from pip._internal.exceptions import InstallationError
+from pip._internal.utils.subprocess import runner_with_spinner_message
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Set, Tuple
+
+    from pip._vendor.pkg_resources import Distribution
+    from pip._internal.index.package_finder import PackageFinder
+
+
+logger = logging.getLogger(__name__)
+
+
+class SourceDistribution(AbstractDistribution):
+    """Represents a source distribution.
+
+    The preparation step for these needs metadata for the packages to be
+    generated, either using PEP 517 or using the legacy `setup.py egg_info`.
+    """
+
+    def get_pkg_resources_distribution(self):
+        # type: () -> Distribution
+        return self.req.get_dist()
+
+    def prepare_distribution_metadata(self, finder, build_isolation):
+        # type: (PackageFinder, bool) -> None
+        # Load pyproject.toml, to determine whether PEP 517 is to be used
+        self.req.load_pyproject_toml()
+
+        # Set up the build isolation, if this requirement should be isolated
+        should_isolate = self.req.use_pep517 and build_isolation
+        if should_isolate:
+            self._setup_isolation(finder)
+
+        self.req.prepare_metadata()
+
+    def _setup_isolation(self, finder):
+        # type: (PackageFinder) -> None
+        def _raise_conflicts(conflicting_with, conflicting_reqs):
+            # type: (str, Set[Tuple[str, str]]) -> None
+            format_string = (
+                "Some build dependencies for {requirement} "
+                "conflict with {conflicting_with}: {description}."
+            )
+            error_message = format_string.format(
+                requirement=self.req,
+                conflicting_with=conflicting_with,
+                description=', '.join(
+                    '{} is incompatible with {}'.format(installed, wanted)
+                    for installed, wanted in sorted(conflicting)
+                )
+            )
+            raise InstallationError(error_message)
+
+        # Isolate in a BuildEnvironment and install the build-time
+        # requirements.
+        pyproject_requires = self.req.pyproject_requires
+        assert pyproject_requires is not None
+
+        self.req.build_env = BuildEnvironment()
+        self.req.build_env.install_requirements(
+            finder, pyproject_requires, 'overlay',
+            "Installing build dependencies"
+        )
+        conflicting, missing = self.req.build_env.check_requirements(
+            self.req.requirements_to_check
+        )
+        if conflicting:
+            _raise_conflicts("PEP 517/518 supported requirements",
+                             conflicting)
+        if missing:
+            logger.warning(
+                "Missing build requirements in pyproject.toml for %s.",
+                self.req,
+            )
+            logger.warning(
+                "The project does not specify a build backend, and "
+                "pip cannot fall back to setuptools without %s.",
+                " and ".join(map(repr, sorted(missing)))
+            )
+        # Install any extra build dependencies that the backend requests.
+        # This must be done in a second pass, as the pyproject.toml
+        # dependencies must be installed before we can call the backend.
+        with self.req.build_env:
+            runner = runner_with_spinner_message(
+                "Getting requirements to build wheel"
+            )
+            backend = self.req.pep517_backend
+            assert backend is not None
+            with backend.subprocess_runner(runner):
+                reqs = backend.get_requires_for_build_wheel()
+
+        conflicting, missing = self.req.build_env.check_requirements(reqs)
+        if conflicting:
+            _raise_conflicts("the backend dependencies", conflicting)
+        self.req.build_env.install_requirements(
+            finder, missing, 'normal',
+            "Installing backend dependencies"
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/wheel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/wheel.py
new file mode 100644
index 0000000..bf3482b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/distributions/wheel.py
@@ -0,0 +1,36 @@
+from zipfile import ZipFile
+
+from pip._internal.distributions.base import AbstractDistribution
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.wheel import pkg_resources_distribution_for_wheel
+
+if MYPY_CHECK_RUNNING:
+    from pip._vendor.pkg_resources import Distribution
+    from pip._internal.index.package_finder import PackageFinder
+
+
+class WheelDistribution(AbstractDistribution):
+    """Represents a wheel distribution.
+
+    This does not need any preparation as wheels can be directly unpacked.
+    """
+
+    def get_pkg_resources_distribution(self):
+        # type: () -> Distribution
+        """Loads the metadata from the wheel file into memory and returns a
+        Distribution that uses it, not relying on the wheel file or
+        requirement.
+        """
+        # Set as part of preparation during download.
+        assert self.req.local_file_path
+        # Wheels are never unnamed.
+        assert self.req.name
+
+        with ZipFile(self.req.local_file_path, allowZip64=True) as z:
+            return pkg_resources_distribution_for_wheel(
+                z, self.req.name, self.req.local_file_path
+            )
+
+    def prepare_distribution_metadata(self, finder, build_isolation):
+        # type: (PackageFinder, bool) -> None
+        pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/exceptions.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/exceptions.py
new file mode 100644
index 0000000..3f26215
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/exceptions.py
@@ -0,0 +1,381 @@
+"""Exceptions used throughout package"""
+
+from __future__ import absolute_import
+
+from itertools import chain, groupby, repeat
+
+from pip._vendor.six import iteritems
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Optional, List, Dict, Text
+
+    from pip._vendor.pkg_resources import Distribution
+    from pip._vendor.requests.models import Response, Request
+    from pip._vendor.six import PY3
+    from pip._vendor.six.moves import configparser
+
+    from pip._internal.req.req_install import InstallRequirement
+
+    if PY3:
+        from hashlib import _Hash
+    else:
+        from hashlib import _hash as _Hash
+
+
+class PipError(Exception):
+    """Base pip exception"""
+
+
+class ConfigurationError(PipError):
+    """General exception in configuration"""
+
+
+class InstallationError(PipError):
+    """General exception during installation"""
+
+
+class UninstallationError(PipError):
+    """General exception during uninstallation"""
+
+
+class NoneMetadataError(PipError):
+    """
+    Raised when accessing "METADATA" or "PKG-INFO" metadata for a
+    pip._vendor.pkg_resources.Distribution object and
+    `dist.has_metadata('METADATA')` returns True but
+    `dist.get_metadata('METADATA')` returns None (and similarly for
+    "PKG-INFO").
+    """
+
+    def __init__(self, dist, metadata_name):
+        # type: (Distribution, str) -> None
+        """
+        :param dist: A Distribution object.
+        :param metadata_name: The name of the metadata being accessed
+            (can be "METADATA" or "PKG-INFO").
+        """
+        self.dist = dist
+        self.metadata_name = metadata_name
+
+    def __str__(self):
+        # type: () -> str
+        # Use `dist` in the error message because its stringification
+        # includes more information, like the version and location.
+        return (
+            'None {} metadata found for distribution: {}'.format(
+                self.metadata_name, self.dist,
+            )
+        )
+
+
+class DistributionNotFound(InstallationError):
+    """Raised when a distribution cannot be found to satisfy a requirement"""
+
+
+class RequirementsFileParseError(InstallationError):
+    """Raised when a general error occurs parsing a requirements file line."""
+
+
+class BestVersionAlreadyInstalled(PipError):
+    """Raised when the most up-to-date version of a package is already
+    installed."""
+
+
+class BadCommand(PipError):
+    """Raised when virtualenv or a command is not found"""
+
+
+class CommandError(PipError):
+    """Raised when there is an error in command-line arguments"""
+
+
+class SubProcessError(PipError):
+    """Raised when there is an error raised while executing a
+    command in subprocess"""
+
+
+class PreviousBuildDirError(PipError):
+    """Raised when there's a previous conflicting build directory"""
+
+
+class NetworkConnectionError(PipError):
+    """HTTP connection error"""
+
+    def __init__(self, error_msg, response=None, request=None):
+        # type: (Text, Response, Request) -> None
+        """
+        Initialize NetworkConnectionError with  `request` and `response`
+        objects.
+        """
+        self.response = response
+        self.request = request
+        self.error_msg = error_msg
+        if (self.response is not None and not self.request and
+                hasattr(response, 'request')):
+            self.request = self.response.request
+        super(NetworkConnectionError, self).__init__(
+            error_msg, response, request)
+
+    def __str__(self):
+        # type: () -> str
+        return str(self.error_msg)
+
+
+class InvalidWheelFilename(InstallationError):
+    """Invalid wheel filename."""
+
+
+class UnsupportedWheel(InstallationError):
+    """Unsupported wheel."""
+
+
+class MetadataInconsistent(InstallationError):
+    """Built metadata contains inconsistent information.
+
+    This is raised when the metadata contains values (e.g. name and version)
+    that do not match the information previously obtained from sdist filename
+    or user-supplied ``#egg=`` value.
+    """
+    def __init__(self, ireq, field, built):
+        # type: (InstallRequirement, str, Any) -> None
+        self.ireq = ireq
+        self.field = field
+        self.built = built
+
+    def __str__(self):
+        # type: () -> str
+        return "Requested {} has different {} in metadata: {!r}".format(
+            self.ireq, self.field, self.built,
+        )
+
+
+class HashErrors(InstallationError):
+    """Multiple HashError instances rolled into one for reporting"""
+
+    def __init__(self):
+        # type: () -> None
+        self.errors = []  # type: List[HashError]
+
+    def append(self, error):
+        # type: (HashError) -> None
+        self.errors.append(error)
+
+    def __str__(self):
+        # type: () -> str
+        lines = []
+        self.errors.sort(key=lambda e: e.order)
+        for cls, errors_of_cls in groupby(self.errors, lambda e: e.__class__):
+            lines.append(cls.head)
+            lines.extend(e.body() for e in errors_of_cls)
+        if lines:
+            return '\n'.join(lines)
+        return ''
+
+    def __nonzero__(self):
+        # type: () -> bool
+        return bool(self.errors)
+
+    def __bool__(self):
+        # type: () -> bool
+        return self.__nonzero__()
+
+
+class HashError(InstallationError):
+    """
+    A failure to verify a package against known-good hashes
+
+    :cvar order: An int sorting hash exception classes by difficulty of
+        recovery (lower being harder), so the user doesn't bother fretting
+        about unpinned packages when he has deeper issues, like VCS
+        dependencies, to deal with. Also keeps error reports in a
+        deterministic order.
+    :cvar head: A section heading for display above potentially many
+        exceptions of this kind
+    :ivar req: The InstallRequirement that triggered this error. This is
+        pasted on after the exception is instantiated, because it's not
+        typically available earlier.
+
+    """
+    req = None  # type: Optional[InstallRequirement]
+    head = ''
+    order = None  # type: Optional[int]
+
+    def body(self):
+        # type: () -> str
+        """Return a summary of me for display under the heading.
+
+        This default implementation simply prints a description of the
+        triggering requirement.
+
+        :param req: The InstallRequirement that provoked this error, with
+            its link already populated by the resolver's _populate_link().
+
+        """
+        return '    {}'.format(self._requirement_name())
+
+    def __str__(self):
+        # type: () -> str
+        return '{}\n{}'.format(self.head, self.body())
+
+    def _requirement_name(self):
+        # type: () -> str
+        """Return a description of the requirement that triggered me.
+
+        This default implementation returns long description of the req, with
+        line numbers
+
+        """
+        return str(self.req) if self.req else 'unknown package'
+
+
+class VcsHashUnsupported(HashError):
+    """A hash was provided for a version-control-system-based requirement, but
+    we don't have a method for hashing those."""
+
+    order = 0
+    head = ("Can't verify hashes for these requirements because we don't "
+            "have a way to hash version control repositories:")
+
+
+class DirectoryUrlHashUnsupported(HashError):
+    """A hash was provided for a version-control-system-based requirement, but
+    we don't have a method for hashing those."""
+
+    order = 1
+    head = ("Can't verify hashes for these file:// requirements because they "
+            "point to directories:")
+
+
+class HashMissing(HashError):
+    """A hash was needed for a requirement but is absent."""
+
+    order = 2
+    head = ('Hashes are required in --require-hashes mode, but they are '
+            'missing from some requirements. Here is a list of those '
+            'requirements along with the hashes their downloaded archives '
+            'actually had. Add lines like these to your requirements files to '
+            'prevent tampering. (If you did not enable --require-hashes '
+            'manually, note that it turns on automatically when any package '
+            'has a hash.)')
+
+    def __init__(self, gotten_hash):
+        # type: (str) -> None
+        """
+        :param gotten_hash: The hash of the (possibly malicious) archive we
+            just downloaded
+        """
+        self.gotten_hash = gotten_hash
+
+    def body(self):
+        # type: () -> str
+        # Dodge circular import.
+        from pip._internal.utils.hashes import FAVORITE_HASH
+
+        package = None
+        if self.req:
+            # In the case of URL-based requirements, display the original URL
+            # seen in the requirements file rather than the package name,
+            # so the output can be directly copied into the requirements file.
+            package = (self.req.original_link if self.req.original_link
+                       # In case someone feeds something downright stupid
+                       # to InstallRequirement's constructor.
+                       else getattr(self.req, 'req', None))
+        return '    {} --hash={}:{}'.format(package or 'unknown package',
+                                            FAVORITE_HASH,
+                                            self.gotten_hash)
+
+
+class HashUnpinned(HashError):
+    """A requirement had a hash specified but was not pinned to a specific
+    version."""
+
+    order = 3
+    head = ('In --require-hashes mode, all requirements must have their '
+            'versions pinned with ==. These do not:')
+
+
+class HashMismatch(HashError):
+    """
+    Distribution file hash values don't match.
+
+    :ivar package_name: The name of the package that triggered the hash
+        mismatch. Feel free to write to this after the exception is raise to
+        improve its error message.
+
+    """
+    order = 4
+    head = ('THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS '
+            'FILE. If you have updated the package versions, please update '
+            'the hashes. Otherwise, examine the package contents carefully; '
+            'someone may have tampered with them.')
+
+    def __init__(self, allowed, gots):
+        # type: (Dict[str, List[str]], Dict[str, _Hash]) -> None
+        """
+        :param allowed: A dict of algorithm names pointing to lists of allowed
+            hex digests
+        :param gots: A dict of algorithm names pointing to hashes we
+            actually got from the files under suspicion
+        """
+        self.allowed = allowed
+        self.gots = gots
+
+    def body(self):
+        # type: () -> str
+        return '    {}:\n{}'.format(self._requirement_name(),
+                                    self._hash_comparison())
+
+    def _hash_comparison(self):
+        # type: () -> str
+        """
+        Return a comparison of actual and expected hash values.
+
+        Example::
+
+               Expected sha256 abcdeabcdeabcdeabcdeabcdeabcdeabcdeabcdeabcde
+                            or 123451234512345123451234512345123451234512345
+                    Got        bcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdef
+
+        """
+        def hash_then_or(hash_name):
+            # type: (str) -> chain[str]
+            # For now, all the decent hashes have 6-char names, so we can get
+            # away with hard-coding space literals.
+            return chain([hash_name], repeat('    or'))
+
+        lines = []  # type: List[str]
+        for hash_name, expecteds in iteritems(self.allowed):
+            prefix = hash_then_or(hash_name)
+            lines.extend(('        Expected {} {}'.format(next(prefix), e))
+                         for e in expecteds)
+            lines.append('             Got        {}\n'.format(
+                         self.gots[hash_name].hexdigest()))
+        return '\n'.join(lines)
+
+
+class UnsupportedPythonVersion(InstallationError):
+    """Unsupported python version according to Requires-Python package
+    metadata."""
+
+
+class ConfigurationFileCouldNotBeLoaded(ConfigurationError):
+    """When there are errors while loading a configuration file
+    """
+
+    def __init__(self, reason="could not be loaded", fname=None, error=None):
+        # type: (str, Optional[str], Optional[configparser.Error]) -> None
+        super(ConfigurationFileCouldNotBeLoaded, self).__init__(error)
+        self.reason = reason
+        self.fname = fname
+        self.error = error
+
+    def __str__(self):
+        # type: () -> str
+        if self.fname is not None:
+            message_part = " in {}.".format(self.fname)
+        else:
+            assert self.error is not None
+            message_part = ".\n{}\n".format(self.error)
+        return "Configuration file {}{}".format(self.reason, message_part)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/__init__.py
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+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/__init__.py
@@ -0,0 +1,2 @@
+"""Index interaction code
+"""
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/collector.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/collector.py
new file mode 100644
index 0000000..ef2100f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/collector.py
@@ -0,0 +1,678 @@
+"""
+The main purpose of this module is to expose LinkCollector.collect_links().
+"""
+
+import cgi
+import functools
+import itertools
+import logging
+import mimetypes
+import os
+import re
+from collections import OrderedDict
+
+from pip._vendor import html5lib, requests
+from pip._vendor.distlib.compat import unescape
+from pip._vendor.requests.exceptions import RetryError, SSLError
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+from pip._vendor.six.moves.urllib import request as urllib_request
+
+from pip._internal.exceptions import NetworkConnectionError
+from pip._internal.models.link import Link
+from pip._internal.models.search_scope import SearchScope
+from pip._internal.network.utils import raise_for_status
+from pip._internal.utils.compat import lru_cache
+from pip._internal.utils.filetypes import ARCHIVE_EXTENSIONS
+from pip._internal.utils.misc import pairwise, redact_auth_from_url
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.urls import path_to_url, url_to_path
+from pip._internal.vcs import is_url, vcs
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import (
+        Callable,
+        Iterable,
+        List,
+        MutableMapping,
+        Optional,
+        Sequence,
+        Tuple,
+        Union,
+    )
+    import xml.etree.ElementTree
+
+    from pip._vendor.requests import Response
+
+    from pip._internal.network.session import PipSession
+
+    HTMLElement = xml.etree.ElementTree.Element
+    ResponseHeaders = MutableMapping[str, str]
+
+
+logger = logging.getLogger(__name__)
+
+
+def _match_vcs_scheme(url):
+    # type: (str) -> Optional[str]
+    """Look for VCS schemes in the URL.
+
+    Returns the matched VCS scheme, or None if there's no match.
+    """
+    for scheme in vcs.schemes:
+        if url.lower().startswith(scheme) and url[len(scheme)] in '+:':
+            return scheme
+    return None
+
+
+def _is_url_like_archive(url):
+    # type: (str) -> bool
+    """Return whether the URL looks like an archive.
+    """
+    filename = Link(url).filename
+    for bad_ext in ARCHIVE_EXTENSIONS:
+        if filename.endswith(bad_ext):
+            return True
+    return False
+
+
+class _NotHTML(Exception):
+    def __init__(self, content_type, request_desc):
+        # type: (str, str) -> None
+        super(_NotHTML, self).__init__(content_type, request_desc)
+        self.content_type = content_type
+        self.request_desc = request_desc
+
+
+def _ensure_html_header(response):
+    # type: (Response) -> None
+    """Check the Content-Type header to ensure the response contains HTML.
+
+    Raises `_NotHTML` if the content type is not text/html.
+    """
+    content_type = response.headers.get("Content-Type", "")
+    if not content_type.lower().startswith("text/html"):
+        raise _NotHTML(content_type, response.request.method)
+
+
+class _NotHTTP(Exception):
+    pass
+
+
+def _ensure_html_response(url, session):
+    # type: (str, PipSession) -> None
+    """Send a HEAD request to the URL, and ensure the response contains HTML.
+
+    Raises `_NotHTTP` if the URL is not available for a HEAD request, or
+    `_NotHTML` if the content type is not text/html.
+    """
+    scheme, netloc, path, query, fragment = urllib_parse.urlsplit(url)
+    if scheme not in {'http', 'https'}:
+        raise _NotHTTP()
+
+    resp = session.head(url, allow_redirects=True)
+    raise_for_status(resp)
+
+    _ensure_html_header(resp)
+
+
+def _get_html_response(url, session):
+    # type: (str, PipSession) -> Response
+    """Access an HTML page with GET, and return the response.
+
+    This consists of three parts:
+
+    1. If the URL looks suspiciously like an archive, send a HEAD first to
+       check the Content-Type is HTML, to avoid downloading a large file.
+       Raise `_NotHTTP` if the content type cannot be determined, or
+       `_NotHTML` if it is not HTML.
+    2. Actually perform the request. Raise HTTP exceptions on network failures.
+    3. Check the Content-Type header to make sure we got HTML, and raise
+       `_NotHTML` otherwise.
+    """
+    if _is_url_like_archive(url):
+        _ensure_html_response(url, session=session)
+
+    logger.debug('Getting page %s', redact_auth_from_url(url))
+
+    resp = session.get(
+        url,
+        headers={
+            "Accept": "text/html",
+            # We don't want to blindly returned cached data for
+            # /simple/, because authors generally expecting that
+            # twine upload && pip install will function, but if
+            # they've done a pip install in the last ~10 minutes
+            # it won't. Thus by setting this to zero we will not
+            # blindly use any cached data, however the benefit of
+            # using max-age=0 instead of no-cache, is that we will
+            # still support conditional requests, so we will still
+            # minimize traffic sent in cases where the page hasn't
+            # changed at all, we will just always incur the round
+            # trip for the conditional GET now instead of only
+            # once per 10 minutes.
+            # For more information, please see pypa/pip#5670.
+            "Cache-Control": "max-age=0",
+        },
+    )
+    raise_for_status(resp)
+
+    # The check for archives above only works if the url ends with
+    # something that looks like an archive. However that is not a
+    # requirement of an url. Unless we issue a HEAD request on every
+    # url we cannot know ahead of time for sure if something is HTML
+    # or not. However we can check after we've downloaded it.
+    _ensure_html_header(resp)
+
+    return resp
+
+
+def _get_encoding_from_headers(headers):
+    # type: (ResponseHeaders) -> Optional[str]
+    """Determine if we have any encoding information in our headers.
+    """
+    if headers and "Content-Type" in headers:
+        content_type, params = cgi.parse_header(headers["Content-Type"])
+        if "charset" in params:
+            return params['charset']
+    return None
+
+
+def _determine_base_url(document, page_url):
+    # type: (HTMLElement, str) -> str
+    """Determine the HTML document's base URL.
+
+    This looks for a ``<base>`` tag in the HTML document. If present, its href
+    attribute denotes the base URL of anchor tags in the document. If there is
+    no such tag (or if it does not have a valid href attribute), the HTML
+    file's URL is used as the base URL.
+
+    :param document: An HTML document representation. The current
+        implementation expects the result of ``html5lib.parse()``.
+    :param page_url: The URL of the HTML document.
+    """
+    for base in document.findall(".//base"):
+        href = base.get("href")
+        if href is not None:
+            return href
+    return page_url
+
+
+def _clean_url_path_part(part):
+    # type: (str) -> str
+    """
+    Clean a "part" of a URL path (i.e. after splitting on "@" characters).
+    """
+    # We unquote prior to quoting to make sure nothing is double quoted.
+    return urllib_parse.quote(urllib_parse.unquote(part))
+
+
+def _clean_file_url_path(part):
+    # type: (str) -> str
+    """
+    Clean the first part of a URL path that corresponds to a local
+    filesystem path (i.e. the first part after splitting on "@" characters).
+    """
+    # We unquote prior to quoting to make sure nothing is double quoted.
+    # Also, on Windows the path part might contain a drive letter which
+    # should not be quoted. On Linux where drive letters do not
+    # exist, the colon should be quoted. We rely on urllib.request
+    # to do the right thing here.
+    return urllib_request.pathname2url(urllib_request.url2pathname(part))
+
+
+# percent-encoded:                   /
+_reserved_chars_re = re.compile('(@|%2F)', re.IGNORECASE)
+
+
+def _clean_url_path(path, is_local_path):
+    # type: (str, bool) -> str
+    """
+    Clean the path portion of a URL.
+    """
+    if is_local_path:
+        clean_func = _clean_file_url_path
+    else:
+        clean_func = _clean_url_path_part
+
+    # Split on the reserved characters prior to cleaning so that
+    # revision strings in VCS URLs are properly preserved.
+    parts = _reserved_chars_re.split(path)
+
+    cleaned_parts = []
+    for to_clean, reserved in pairwise(itertools.chain(parts, [''])):
+        cleaned_parts.append(clean_func(to_clean))
+        # Normalize %xx escapes (e.g. %2f -> %2F)
+        cleaned_parts.append(reserved.upper())
+
+    return ''.join(cleaned_parts)
+
+
+def _clean_link(url):
+    # type: (str) -> str
+    """
+    Make sure a link is fully quoted.
+    For example, if ' ' occurs in the URL, it will be replaced with "%20",
+    and without double-quoting other characters.
+    """
+    # Split the URL into parts according to the general structure
+    # `scheme://netloc/path;parameters?query#fragment`.
+    result = urllib_parse.urlparse(url)
+    # If the netloc is empty, then the URL refers to a local filesystem path.
+    is_local_path = not result.netloc
+    path = _clean_url_path(result.path, is_local_path=is_local_path)
+    return urllib_parse.urlunparse(result._replace(path=path))
+
+
+def _create_link_from_element(
+    anchor,    # type: HTMLElement
+    page_url,  # type: str
+    base_url,  # type: str
+):
+    # type: (...) -> Optional[Link]
+    """
+    Convert an anchor element in a simple repository page to a Link.
+    """
+    href = anchor.get("href")
+    if not href:
+        return None
+
+    url = _clean_link(urllib_parse.urljoin(base_url, href))
+    pyrequire = anchor.get('data-requires-python')
+    pyrequire = unescape(pyrequire) if pyrequire else None
+
+    yanked_reason = anchor.get('data-yanked')
+    if yanked_reason:
+        # This is a unicode string in Python 2 (and 3).
+        yanked_reason = unescape(yanked_reason)
+
+    link = Link(
+        url,
+        comes_from=page_url,
+        requires_python=pyrequire,
+        yanked_reason=yanked_reason,
+    )
+
+    return link
+
+
+class CacheablePageContent(object):
+    def __init__(self, page):
+        # type: (HTMLPage) -> None
+        assert page.cache_link_parsing
+        self.page = page
+
+    def __eq__(self, other):
+        # type: (object) -> bool
+        return (isinstance(other, type(self)) and
+                self.page.url == other.page.url)
+
+    def __hash__(self):
+        # type: () -> int
+        return hash(self.page.url)
+
+
+def with_cached_html_pages(
+    fn,    # type: Callable[[HTMLPage], Iterable[Link]]
+):
+    # type: (...) -> Callable[[HTMLPage], List[Link]]
+    """
+    Given a function that parses an Iterable[Link] from an HTMLPage, cache the
+    function's result (keyed by CacheablePageContent), unless the HTMLPage
+    `page` has `page.cache_link_parsing == False`.
+    """
+
+    @lru_cache(maxsize=None)
+    def wrapper(cacheable_page):
+        # type: (CacheablePageContent) -> List[Link]
+        return list(fn(cacheable_page.page))
+
+    @functools.wraps(fn)
+    def wrapper_wrapper(page):
+        # type: (HTMLPage) -> List[Link]
+        if page.cache_link_parsing:
+            return wrapper(CacheablePageContent(page))
+        return list(fn(page))
+
+    return wrapper_wrapper
+
+
+@with_cached_html_pages
+def parse_links(page):
+    # type: (HTMLPage) -> Iterable[Link]
+    """
+    Parse an HTML document, and yield its anchor elements as Link objects.
+    """
+    document = html5lib.parse(
+        page.content,
+        transport_encoding=page.encoding,
+        namespaceHTMLElements=False,
+    )
+
+    url = page.url
+    base_url = _determine_base_url(document, url)
+    for anchor in document.findall(".//a"):
+        link = _create_link_from_element(
+            anchor,
+            page_url=url,
+            base_url=base_url,
+        )
+        if link is None:
+            continue
+        yield link
+
+
+class HTMLPage(object):
+    """Represents one page, along with its URL"""
+
+    def __init__(
+        self,
+        content,                  # type: bytes
+        encoding,                 # type: Optional[str]
+        url,                      # type: str
+        cache_link_parsing=True,  # type: bool
+    ):
+        # type: (...) -> None
+        """
+        :param encoding: the encoding to decode the given content.
+        :param url: the URL from which the HTML was downloaded.
+        :param cache_link_parsing: whether links parsed from this page's url
+                                   should be cached. PyPI index urls should
+                                   have this set to False, for example.
+        """
+        self.content = content
+        self.encoding = encoding
+        self.url = url
+        self.cache_link_parsing = cache_link_parsing
+
+    def __str__(self):
+        # type: () -> str
+        return redact_auth_from_url(self.url)
+
+
+def _handle_get_page_fail(
+    link,  # type: Link
+    reason,  # type: Union[str, Exception]
+    meth=None  # type: Optional[Callable[..., None]]
+):
+    # type: (...) -> None
+    if meth is None:
+        meth = logger.debug
+    meth("Could not fetch URL %s: %s - skipping", link, reason)
+
+
+def _make_html_page(response, cache_link_parsing=True):
+    # type: (Response, bool) -> HTMLPage
+    encoding = _get_encoding_from_headers(response.headers)
+    return HTMLPage(
+        response.content,
+        encoding=encoding,
+        url=response.url,
+        cache_link_parsing=cache_link_parsing)
+
+
+def _get_html_page(link, session=None):
+    # type: (Link, Optional[PipSession]) -> Optional[HTMLPage]
+    if session is None:
+        raise TypeError(
+            "_get_html_page() missing 1 required keyword argument: 'session'"
+        )
+
+    url = link.url.split('#', 1)[0]
+
+    # Check for VCS schemes that do not support lookup as web pages.
+    vcs_scheme = _match_vcs_scheme(url)
+    if vcs_scheme:
+        logger.warning('Cannot look at %s URL %s because it does not support '
+                       'lookup as web pages.', vcs_scheme, link)
+        return None
+
+    # Tack index.html onto file:// URLs that point to directories
+    scheme, _, path, _, _, _ = urllib_parse.urlparse(url)
+    if (scheme == 'file' and os.path.isdir(urllib_request.url2pathname(path))):
+        # add trailing slash if not present so urljoin doesn't trim
+        # final segment
+        if not url.endswith('/'):
+            url += '/'
+        url = urllib_parse.urljoin(url, 'index.html')
+        logger.debug(' file: URL is directory, getting %s', url)
+
+    try:
+        resp = _get_html_response(url, session=session)
+    except _NotHTTP:
+        logger.warning(
+            'Skipping page %s because it looks like an archive, and cannot '
+            'be checked by a HTTP HEAD request.', link,
+        )
+    except _NotHTML as exc:
+        logger.warning(
+            'Skipping page %s because the %s request got Content-Type: %s.'
+            'The only supported Content-Type is text/html',
+            link, exc.request_desc, exc.content_type,
+        )
+    except NetworkConnectionError as exc:
+        _handle_get_page_fail(link, exc)
+    except RetryError as exc:
+        _handle_get_page_fail(link, exc)
+    except SSLError as exc:
+        reason = "There was a problem confirming the ssl certificate: "
+        reason += str(exc)
+        _handle_get_page_fail(link, reason, meth=logger.info)
+    except requests.ConnectionError as exc:
+        _handle_get_page_fail(link, "connection error: {}".format(exc))
+    except requests.Timeout:
+        _handle_get_page_fail(link, "timed out")
+    else:
+        return _make_html_page(resp,
+                               cache_link_parsing=link.cache_link_parsing)
+    return None
+
+
+def _remove_duplicate_links(links):
+    # type: (Iterable[Link]) -> List[Link]
+    """
+    Return a list of links, with duplicates removed and ordering preserved.
+    """
+    # We preserve the ordering when removing duplicates because we can.
+    return list(OrderedDict.fromkeys(links))
+
+
+def group_locations(locations, expand_dir=False):
+    # type: (Sequence[str], bool) -> Tuple[List[str], List[str]]
+    """
+    Divide a list of locations into two groups: "files" (archives) and "urls."
+
+    :return: A pair of lists (files, urls).
+    """
+    files = []
+    urls = []
+
+    # puts the url for the given file path into the appropriate list
+    def sort_path(path):
+        # type: (str) -> None
+        url = path_to_url(path)
+        if mimetypes.guess_type(url, strict=False)[0] == 'text/html':
+            urls.append(url)
+        else:
+            files.append(url)
+
+    for url in locations:
+
+        is_local_path = os.path.exists(url)
+        is_file_url = url.startswith('file:')
+
+        if is_local_path or is_file_url:
+            if is_local_path:
+                path = url
+            else:
+                path = url_to_path(url)
+            if os.path.isdir(path):
+                if expand_dir:
+                    path = os.path.realpath(path)
+                    for item in os.listdir(path):
+                        sort_path(os.path.join(path, item))
+                elif is_file_url:
+                    urls.append(url)
+                else:
+                    logger.warning(
+                        "Path '%s' is ignored: it is a directory.", path,
+                    )
+            elif os.path.isfile(path):
+                sort_path(path)
+            else:
+                logger.warning(
+                    "Url '%s' is ignored: it is neither a file "
+                    "nor a directory.", url,
+                )
+        elif is_url(url):
+            # Only add url with clear scheme
+            urls.append(url)
+        else:
+            logger.warning(
+                "Url '%s' is ignored. It is either a non-existing "
+                "path or lacks a specific scheme.", url,
+            )
+
+    return files, urls
+
+
+class CollectedLinks(object):
+
+    """
+    Encapsulates the return value of a call to LinkCollector.collect_links().
+
+    The return value includes both URLs to project pages containing package
+    links, as well as individual package Link objects collected from other
+    sources.
+
+    This info is stored separately as:
+
+    (1) links from the configured file locations,
+    (2) links from the configured find_links, and
+    (3) urls to HTML project pages, as described by the PEP 503 simple
+        repository API.
+    """
+
+    def __init__(
+        self,
+        files,         # type: List[Link]
+        find_links,    # type: List[Link]
+        project_urls,  # type: List[Link]
+    ):
+        # type: (...) -> None
+        """
+        :param files: Links from file locations.
+        :param find_links: Links from find_links.
+        :param project_urls: URLs to HTML project pages, as described by
+            the PEP 503 simple repository API.
+        """
+        self.files = files
+        self.find_links = find_links
+        self.project_urls = project_urls
+
+
+class LinkCollector(object):
+
+    """
+    Responsible for collecting Link objects from all configured locations,
+    making network requests as needed.
+
+    The class's main method is its collect_links() method.
+    """
+
+    def __init__(
+        self,
+        session,       # type: PipSession
+        search_scope,  # type: SearchScope
+    ):
+        # type: (...) -> None
+        self.search_scope = search_scope
+        self.session = session
+
+    @classmethod
+    def create(cls, session, options, suppress_no_index=False):
+        # type: (PipSession, Values, bool) -> LinkCollector
+        """
+        :param session: The Session to use to make requests.
+        :param suppress_no_index: Whether to ignore the --no-index option
+            when constructing the SearchScope object.
+        """
+        index_urls = [options.index_url] + options.extra_index_urls
+        if options.no_index and not suppress_no_index:
+            logger.debug(
+                'Ignoring indexes: %s',
+                ','.join(redact_auth_from_url(url) for url in index_urls),
+            )
+            index_urls = []
+
+        # Make sure find_links is a list before passing to create().
+        find_links = options.find_links or []
+
+        search_scope = SearchScope.create(
+            find_links=find_links, index_urls=index_urls,
+        )
+        link_collector = LinkCollector(
+            session=session, search_scope=search_scope,
+        )
+        return link_collector
+
+    @property
+    def find_links(self):
+        # type: () -> List[str]
+        return self.search_scope.find_links
+
+    def fetch_page(self, location):
+        # type: (Link) -> Optional[HTMLPage]
+        """
+        Fetch an HTML page containing package links.
+        """
+        return _get_html_page(location, session=self.session)
+
+    def collect_links(self, project_name):
+        # type: (str) -> CollectedLinks
+        """Find all available links for the given project name.
+
+        :return: All the Link objects (unfiltered), as a CollectedLinks object.
+        """
+        search_scope = self.search_scope
+        index_locations = search_scope.get_index_urls_locations(project_name)
+        index_file_loc, index_url_loc = group_locations(index_locations)
+        fl_file_loc, fl_url_loc = group_locations(
+            self.find_links, expand_dir=True,
+        )
+
+        file_links = [
+            Link(url) for url in itertools.chain(index_file_loc, fl_file_loc)
+        ]
+
+        # We trust every directly linked archive in find_links
+        find_link_links = [Link(url, '-f') for url in self.find_links]
+
+        # We trust every url that the user has given us whether it was given
+        # via --index-url or --find-links.
+        # We want to filter out anything that does not have a secure origin.
+        url_locations = [
+            link for link in itertools.chain(
+                # Mark PyPI indices as "cache_link_parsing == False" -- this
+                # will avoid caching the result of parsing the page for links.
+                (Link(url, cache_link_parsing=False) for url in index_url_loc),
+                (Link(url) for url in fl_url_loc),
+            )
+            if self.session.is_secure_origin(link)
+        ]
+
+        url_locations = _remove_duplicate_links(url_locations)
+        lines = [
+            '{} location(s) to search for versions of {}:'.format(
+                len(url_locations), project_name,
+            ),
+        ]
+        for link in url_locations:
+            lines.append('* {}'.format(link))
+        logger.debug('\n'.join(lines))
+
+        return CollectedLinks(
+            files=file_links,
+            find_links=find_link_links,
+            project_urls=url_locations,
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/package_finder.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/package_finder.py
new file mode 100644
index 0000000..8ceccee
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/index/package_finder.py
@@ -0,0 +1,1016 @@
+"""Routines related to PyPI, indexes"""
+
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+from __future__ import absolute_import
+
+import logging
+import re
+
+from pip._vendor.packaging import specifiers
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.packaging.version import parse as parse_version
+
+from pip._internal.exceptions import (
+    BestVersionAlreadyInstalled,
+    DistributionNotFound,
+    InvalidWheelFilename,
+    UnsupportedWheel,
+)
+from pip._internal.index.collector import parse_links
+from pip._internal.models.candidate import InstallationCandidate
+from pip._internal.models.format_control import FormatControl
+from pip._internal.models.link import Link
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.models.target_python import TargetPython
+from pip._internal.models.wheel import Wheel
+from pip._internal.utils.compat import lru_cache
+from pip._internal.utils.filetypes import WHEEL_EXTENSION
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import build_netloc
+from pip._internal.utils.packaging import check_requires_python
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.unpacking import SUPPORTED_EXTENSIONS
+from pip._internal.utils.urls import url_to_path
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        FrozenSet, Iterable, List, Optional, Set, Text, Tuple, Union,
+    )
+
+    from pip._vendor.packaging.tags import Tag
+    from pip._vendor.packaging.version import _BaseVersion
+
+    from pip._internal.index.collector import LinkCollector
+    from pip._internal.models.search_scope import SearchScope
+    from pip._internal.req import InstallRequirement
+    from pip._internal.utils.hashes import Hashes
+
+    BuildTag = Union[Tuple[()], Tuple[int, str]]
+    CandidateSortingKey = (
+        Tuple[int, int, int, _BaseVersion, BuildTag, Optional[int]]
+    )
+
+
+__all__ = ['FormatControl', 'BestCandidateResult', 'PackageFinder']
+
+
+logger = logging.getLogger(__name__)
+
+
+def _check_link_requires_python(
+    link,  # type: Link
+    version_info,  # type: Tuple[int, int, int]
+    ignore_requires_python=False,  # type: bool
+):
+    # type: (...) -> bool
+    """
+    Return whether the given Python version is compatible with a link's
+    "Requires-Python" value.
+
+    :param version_info: A 3-tuple of ints representing the Python
+        major-minor-micro version to check.
+    :param ignore_requires_python: Whether to ignore the "Requires-Python"
+        value if the given Python version isn't compatible.
+    """
+    try:
+        is_compatible = check_requires_python(
+            link.requires_python, version_info=version_info,
+        )
+    except specifiers.InvalidSpecifier:
+        logger.debug(
+            "Ignoring invalid Requires-Python (%r) for link: %s",
+            link.requires_python, link,
+        )
+    else:
+        if not is_compatible:
+            version = '.'.join(map(str, version_info))
+            if not ignore_requires_python:
+                logger.debug(
+                    'Link requires a different Python (%s not in: %r): %s',
+                    version, link.requires_python, link,
+                )
+                return False
+
+            logger.debug(
+                'Ignoring failed Requires-Python check (%s not in: %r) '
+                'for link: %s',
+                version, link.requires_python, link,
+            )
+
+    return True
+
+
+class LinkEvaluator(object):
+
+    """
+    Responsible for evaluating links for a particular project.
+    """
+
+    _py_version_re = re.compile(r'-py([123]\.?[0-9]?)$')
+
+    # Don't include an allow_yanked default value to make sure each call
+    # site considers whether yanked releases are allowed. This also causes
+    # that decision to be made explicit in the calling code, which helps
+    # people when reading the code.
+    def __init__(
+        self,
+        project_name,    # type: str
+        canonical_name,  # type: str
+        formats,         # type: FrozenSet[str]
+        target_python,   # type: TargetPython
+        allow_yanked,    # type: bool
+        ignore_requires_python=None,  # type: Optional[bool]
+    ):
+        # type: (...) -> None
+        """
+        :param project_name: The user supplied package name.
+        :param canonical_name: The canonical package name.
+        :param formats: The formats allowed for this package. Should be a set
+            with 'binary' or 'source' or both in it.
+        :param target_python: The target Python interpreter to use when
+            evaluating link compatibility. This is used, for example, to
+            check wheel compatibility, as well as when checking the Python
+            version, e.g. the Python version embedded in a link filename
+            (or egg fragment) and against an HTML link's optional PEP 503
+            "data-requires-python" attribute.
+        :param allow_yanked: Whether files marked as yanked (in the sense
+            of PEP 592) are permitted to be candidates for install.
+        :param ignore_requires_python: Whether to ignore incompatible
+            PEP 503 "data-requires-python" values in HTML links. Defaults
+            to False.
+        """
+        if ignore_requires_python is None:
+            ignore_requires_python = False
+
+        self._allow_yanked = allow_yanked
+        self._canonical_name = canonical_name
+        self._ignore_requires_python = ignore_requires_python
+        self._formats = formats
+        self._target_python = target_python
+
+        self.project_name = project_name
+
+    def evaluate_link(self, link):
+        # type: (Link) -> Tuple[bool, Optional[Text]]
+        """
+        Determine whether a link is a candidate for installation.
+
+        :return: A tuple (is_candidate, result), where `result` is (1) a
+            version string if `is_candidate` is True, and (2) if
+            `is_candidate` is False, an optional string to log the reason
+            the link fails to qualify.
+        """
+        version = None
+        if link.is_yanked and not self._allow_yanked:
+            reason = link.yanked_reason or '<none given>'
+            # Mark this as a unicode string to prevent "UnicodeEncodeError:
+            # 'ascii' codec can't encode character" in Python 2 when
+            # the reason contains non-ascii characters.
+            return (False, u'yanked for reason: {}'.format(reason))
+
+        if link.egg_fragment:
+            egg_info = link.egg_fragment
+            ext = link.ext
+        else:
+            egg_info, ext = link.splitext()
+            if not ext:
+                return (False, 'not a file')
+            if ext not in SUPPORTED_EXTENSIONS:
+                return (False, 'unsupported archive format: {}'.format(ext))
+            if "binary" not in self._formats and ext == WHEEL_EXTENSION:
+                reason = 'No binaries permitted for {}'.format(
+                    self.project_name)
+                return (False, reason)
+            if "macosx10" in link.path and ext == '.zip':
+                return (False, 'macosx10 one')
+            if ext == WHEEL_EXTENSION:
+                try:
+                    wheel = Wheel(link.filename)
+                except InvalidWheelFilename:
+                    return (False, 'invalid wheel filename')
+                if canonicalize_name(wheel.name) != self._canonical_name:
+                    reason = 'wrong project name (not {})'.format(
+                        self.project_name)
+                    return (False, reason)
+
+                supported_tags = self._target_python.get_tags()
+                if not wheel.supported(supported_tags):
+                    # Include the wheel's tags in the reason string to
+                    # simplify troubleshooting compatibility issues.
+                    file_tags = wheel.get_formatted_file_tags()
+                    reason = (
+                        "none of the wheel's tags match: {}".format(
+                            ', '.join(file_tags)
+                        )
+                    )
+                    return (False, reason)
+
+                version = wheel.version
+
+        # This should be up by the self.ok_binary check, but see issue 2700.
+        if "source" not in self._formats and ext != WHEEL_EXTENSION:
+            reason = 'No sources permitted for {}'.format(self.project_name)
+            return (False, reason)
+
+        if not version:
+            version = _extract_version_from_fragment(
+                egg_info, self._canonical_name,
+            )
+        if not version:
+            reason = 'Missing project version for {}'.format(self.project_name)
+            return (False, reason)
+
+        match = self._py_version_re.search(version)
+        if match:
+            version = version[:match.start()]
+            py_version = match.group(1)
+            if py_version != self._target_python.py_version:
+                return (False, 'Python version is incorrect')
+
+        supports_python = _check_link_requires_python(
+            link, version_info=self._target_python.py_version_info,
+            ignore_requires_python=self._ignore_requires_python,
+        )
+        if not supports_python:
+            # Return None for the reason text to suppress calling
+            # _log_skipped_link().
+            return (False, None)
+
+        logger.debug('Found link %s, version: %s', link, version)
+
+        return (True, version)
+
+
+def filter_unallowed_hashes(
+    candidates,    # type: List[InstallationCandidate]
+    hashes,        # type: Hashes
+    project_name,  # type: str
+):
+    # type: (...) -> List[InstallationCandidate]
+    """
+    Filter out candidates whose hashes aren't allowed, and return a new
+    list of candidates.
+
+    If at least one candidate has an allowed hash, then all candidates with
+    either an allowed hash or no hash specified are returned.  Otherwise,
+    the given candidates are returned.
+
+    Including the candidates with no hash specified when there is a match
+    allows a warning to be logged if there is a more preferred candidate
+    with no hash specified.  Returning all candidates in the case of no
+    matches lets pip report the hash of the candidate that would otherwise
+    have been installed (e.g. permitting the user to more easily update
+    their requirements file with the desired hash).
+    """
+    if not hashes:
+        logger.debug(
+            'Given no hashes to check %s links for project %r: '
+            'discarding no candidates',
+            len(candidates),
+            project_name,
+        )
+        # Make sure we're not returning back the given value.
+        return list(candidates)
+
+    matches_or_no_digest = []
+    # Collect the non-matches for logging purposes.
+    non_matches = []
+    match_count = 0
+    for candidate in candidates:
+        link = candidate.link
+        if not link.has_hash:
+            pass
+        elif link.is_hash_allowed(hashes=hashes):
+            match_count += 1
+        else:
+            non_matches.append(candidate)
+            continue
+
+        matches_or_no_digest.append(candidate)
+
+    if match_count:
+        filtered = matches_or_no_digest
+    else:
+        # Make sure we're not returning back the given value.
+        filtered = list(candidates)
+
+    if len(filtered) == len(candidates):
+        discard_message = 'discarding no candidates'
+    else:
+        discard_message = 'discarding {} non-matches:\n  {}'.format(
+            len(non_matches),
+            '\n  '.join(str(candidate.link) for candidate in non_matches)
+        )
+
+    logger.debug(
+        'Checked %s links for project %r against %s hashes '
+        '(%s matches, %s no digest): %s',
+        len(candidates),
+        project_name,
+        hashes.digest_count,
+        match_count,
+        len(matches_or_no_digest) - match_count,
+        discard_message
+    )
+
+    return filtered
+
+
+class CandidatePreferences(object):
+
+    """
+    Encapsulates some of the preferences for filtering and sorting
+    InstallationCandidate objects.
+    """
+
+    def __init__(
+        self,
+        prefer_binary=False,  # type: bool
+        allow_all_prereleases=False,  # type: bool
+    ):
+        # type: (...) -> None
+        """
+        :param allow_all_prereleases: Whether to allow all pre-releases.
+        """
+        self.allow_all_prereleases = allow_all_prereleases
+        self.prefer_binary = prefer_binary
+
+
+class BestCandidateResult(object):
+    """A collection of candidates, returned by `PackageFinder.find_best_candidate`.
+
+    This class is only intended to be instantiated by CandidateEvaluator's
+    `compute_best_candidate()` method.
+    """
+
+    def __init__(
+        self,
+        candidates,             # type: List[InstallationCandidate]
+        applicable_candidates,  # type: List[InstallationCandidate]
+        best_candidate,         # type: Optional[InstallationCandidate]
+    ):
+        # type: (...) -> None
+        """
+        :param candidates: A sequence of all available candidates found.
+        :param applicable_candidates: The applicable candidates.
+        :param best_candidate: The most preferred candidate found, or None
+            if no applicable candidates were found.
+        """
+        assert set(applicable_candidates) <= set(candidates)
+
+        if best_candidate is None:
+            assert not applicable_candidates
+        else:
+            assert best_candidate in applicable_candidates
+
+        self._applicable_candidates = applicable_candidates
+        self._candidates = candidates
+
+        self.best_candidate = best_candidate
+
+    def iter_all(self):
+        # type: () -> Iterable[InstallationCandidate]
+        """Iterate through all candidates.
+        """
+        return iter(self._candidates)
+
+    def iter_applicable(self):
+        # type: () -> Iterable[InstallationCandidate]
+        """Iterate through the applicable candidates.
+        """
+        return iter(self._applicable_candidates)
+
+
+class CandidateEvaluator(object):
+
+    """
+    Responsible for filtering and sorting candidates for installation based
+    on what tags are valid.
+    """
+
+    @classmethod
+    def create(
+        cls,
+        project_name,         # type: str
+        target_python=None,   # type: Optional[TargetPython]
+        prefer_binary=False,  # type: bool
+        allow_all_prereleases=False,  # type: bool
+        specifier=None,       # type: Optional[specifiers.BaseSpecifier]
+        hashes=None,          # type: Optional[Hashes]
+    ):
+        # type: (...) -> CandidateEvaluator
+        """Create a CandidateEvaluator object.
+
+        :param target_python: The target Python interpreter to use when
+            checking compatibility. If None (the default), a TargetPython
+            object will be constructed from the running Python.
+        :param specifier: An optional object implementing `filter`
+            (e.g. `packaging.specifiers.SpecifierSet`) to filter applicable
+            versions.
+        :param hashes: An optional collection of allowed hashes.
+        """
+        if target_python is None:
+            target_python = TargetPython()
+        if specifier is None:
+            specifier = specifiers.SpecifierSet()
+
+        supported_tags = target_python.get_tags()
+
+        return cls(
+            project_name=project_name,
+            supported_tags=supported_tags,
+            specifier=specifier,
+            prefer_binary=prefer_binary,
+            allow_all_prereleases=allow_all_prereleases,
+            hashes=hashes,
+        )
+
+    def __init__(
+        self,
+        project_name,         # type: str
+        supported_tags,       # type: List[Tag]
+        specifier,            # type: specifiers.BaseSpecifier
+        prefer_binary=False,  # type: bool
+        allow_all_prereleases=False,  # type: bool
+        hashes=None,                  # type: Optional[Hashes]
+    ):
+        # type: (...) -> None
+        """
+        :param supported_tags: The PEP 425 tags supported by the target
+            Python in order of preference (most preferred first).
+        """
+        self._allow_all_prereleases = allow_all_prereleases
+        self._hashes = hashes
+        self._prefer_binary = prefer_binary
+        self._project_name = project_name
+        self._specifier = specifier
+        self._supported_tags = supported_tags
+
+    def get_applicable_candidates(
+        self,
+        candidates,  # type: List[InstallationCandidate]
+    ):
+        # type: (...) -> List[InstallationCandidate]
+        """
+        Return the applicable candidates from a list of candidates.
+        """
+        # Using None infers from the specifier instead.
+        allow_prereleases = self._allow_all_prereleases or None
+        specifier = self._specifier
+        versions = {
+            str(v) for v in specifier.filter(
+                # We turn the version object into a str here because otherwise
+                # when we're debundled but setuptools isn't, Python will see
+                # packaging.version.Version and
+                # pkg_resources._vendor.packaging.version.Version as different
+                # types. This way we'll use a str as a common data interchange
+                # format. If we stop using the pkg_resources provided specifier
+                # and start using our own, we can drop the cast to str().
+                (str(c.version) for c in candidates),
+                prereleases=allow_prereleases,
+            )
+        }
+
+        # Again, converting version to str to deal with debundling.
+        applicable_candidates = [
+            c for c in candidates if str(c.version) in versions
+        ]
+
+        filtered_applicable_candidates = filter_unallowed_hashes(
+            candidates=applicable_candidates,
+            hashes=self._hashes,
+            project_name=self._project_name,
+        )
+
+        return sorted(filtered_applicable_candidates, key=self._sort_key)
+
+    def _sort_key(self, candidate):
+        # type: (InstallationCandidate) -> CandidateSortingKey
+        """
+        Function to pass as the `key` argument to a call to sorted() to sort
+        InstallationCandidates by preference.
+
+        Returns a tuple such that tuples sorting as greater using Python's
+        default comparison operator are more preferred.
+
+        The preference is as follows:
+
+        First and foremost, candidates with allowed (matching) hashes are
+        always preferred over candidates without matching hashes. This is
+        because e.g. if the only candidate with an allowed hash is yanked,
+        we still want to use that candidate.
+
+        Second, excepting hash considerations, candidates that have been
+        yanked (in the sense of PEP 592) are always less preferred than
+        candidates that haven't been yanked. Then:
+
+        If not finding wheels, they are sorted by version only.
+        If finding wheels, then the sort order is by version, then:
+          1. existing installs
+          2. wheels ordered via Wheel.support_index_min(self._supported_tags)
+          3. source archives
+        If prefer_binary was set, then all wheels are sorted above sources.
+
+        Note: it was considered to embed this logic into the Link
+              comparison operators, but then different sdist links
+              with the same version, would have to be considered equal
+        """
+        valid_tags = self._supported_tags
+        support_num = len(valid_tags)
+        build_tag = ()  # type: BuildTag
+        binary_preference = 0
+        link = candidate.link
+        if link.is_wheel:
+            # can raise InvalidWheelFilename
+            wheel = Wheel(link.filename)
+            if not wheel.supported(valid_tags):
+                raise UnsupportedWheel(
+                    "{} is not a supported wheel for this platform. It "
+                    "can't be sorted.".format(wheel.filename)
+                )
+            if self._prefer_binary:
+                binary_preference = 1
+            pri = -(wheel.support_index_min(valid_tags))
+            if wheel.build_tag is not None:
+                match = re.match(r'^(\d+)(.*)$', wheel.build_tag)
+                build_tag_groups = match.groups()
+                build_tag = (int(build_tag_groups[0]), build_tag_groups[1])
+        else:  # sdist
+            pri = -(support_num)
+        has_allowed_hash = int(link.is_hash_allowed(self._hashes))
+        yank_value = -1 * int(link.is_yanked)  # -1 for yanked.
+        return (
+            has_allowed_hash, yank_value, binary_preference, candidate.version,
+            build_tag, pri,
+        )
+
+    def sort_best_candidate(
+        self,
+        candidates,    # type: List[InstallationCandidate]
+    ):
+        # type: (...) -> Optional[InstallationCandidate]
+        """
+        Return the best candidate per the instance's sort order, or None if
+        no candidate is acceptable.
+        """
+        if not candidates:
+            return None
+        best_candidate = max(candidates, key=self._sort_key)
+        return best_candidate
+
+    def compute_best_candidate(
+        self,
+        candidates,      # type: List[InstallationCandidate]
+    ):
+        # type: (...) -> BestCandidateResult
+        """
+        Compute and return a `BestCandidateResult` instance.
+        """
+        applicable_candidates = self.get_applicable_candidates(candidates)
+
+        best_candidate = self.sort_best_candidate(applicable_candidates)
+
+        return BestCandidateResult(
+            candidates,
+            applicable_candidates=applicable_candidates,
+            best_candidate=best_candidate,
+        )
+
+
+class PackageFinder(object):
+    """This finds packages.
+
+    This is meant to match easy_install's technique for looking for
+    packages, by reading pages and looking for appropriate links.
+    """
+
+    def __init__(
+        self,
+        link_collector,       # type: LinkCollector
+        target_python,        # type: TargetPython
+        allow_yanked,         # type: bool
+        format_control=None,  # type: Optional[FormatControl]
+        candidate_prefs=None,         # type: CandidatePreferences
+        ignore_requires_python=None,  # type: Optional[bool]
+    ):
+        # type: (...) -> None
+        """
+        This constructor is primarily meant to be used by the create() class
+        method and from tests.
+
+        :param format_control: A FormatControl object, used to control
+            the selection of source packages / binary packages when consulting
+            the index and links.
+        :param candidate_prefs: Options to use when creating a
+            CandidateEvaluator object.
+        """
+        if candidate_prefs is None:
+            candidate_prefs = CandidatePreferences()
+
+        format_control = format_control or FormatControl(set(), set())
+
+        self._allow_yanked = allow_yanked
+        self._candidate_prefs = candidate_prefs
+        self._ignore_requires_python = ignore_requires_python
+        self._link_collector = link_collector
+        self._target_python = target_python
+
+        self.format_control = format_control
+
+        # These are boring links that have already been logged somehow.
+        self._logged_links = set()  # type: Set[Link]
+
+    # Don't include an allow_yanked default value to make sure each call
+    # site considers whether yanked releases are allowed. This also causes
+    # that decision to be made explicit in the calling code, which helps
+    # people when reading the code.
+    @classmethod
+    def create(
+        cls,
+        link_collector,      # type: LinkCollector
+        selection_prefs,     # type: SelectionPreferences
+        target_python=None,  # type: Optional[TargetPython]
+    ):
+        # type: (...) -> PackageFinder
+        """Create a PackageFinder.
+
+        :param selection_prefs: The candidate selection preferences, as a
+            SelectionPreferences object.
+        :param target_python: The target Python interpreter to use when
+            checking compatibility. If None (the default), a TargetPython
+            object will be constructed from the running Python.
+        """
+        if target_python is None:
+            target_python = TargetPython()
+
+        candidate_prefs = CandidatePreferences(
+            prefer_binary=selection_prefs.prefer_binary,
+            allow_all_prereleases=selection_prefs.allow_all_prereleases,
+        )
+
+        return cls(
+            candidate_prefs=candidate_prefs,
+            link_collector=link_collector,
+            target_python=target_python,
+            allow_yanked=selection_prefs.allow_yanked,
+            format_control=selection_prefs.format_control,
+            ignore_requires_python=selection_prefs.ignore_requires_python,
+        )
+
+    @property
+    def target_python(self):
+        # type: () -> TargetPython
+        return self._target_python
+
+    @property
+    def search_scope(self):
+        # type: () -> SearchScope
+        return self._link_collector.search_scope
+
+    @search_scope.setter
+    def search_scope(self, search_scope):
+        # type: (SearchScope) -> None
+        self._link_collector.search_scope = search_scope
+
+    @property
+    def find_links(self):
+        # type: () -> List[str]
+        return self._link_collector.find_links
+
+    @property
+    def index_urls(self):
+        # type: () -> List[str]
+        return self.search_scope.index_urls
+
+    @property
+    def trusted_hosts(self):
+        # type: () -> Iterable[str]
+        for host_port in self._link_collector.session.pip_trusted_origins:
+            yield build_netloc(*host_port)
+
+    @property
+    def allow_all_prereleases(self):
+        # type: () -> bool
+        return self._candidate_prefs.allow_all_prereleases
+
+    def set_allow_all_prereleases(self):
+        # type: () -> None
+        self._candidate_prefs.allow_all_prereleases = True
+
+    @property
+    def prefer_binary(self):
+        # type: () -> bool
+        return self._candidate_prefs.prefer_binary
+
+    def set_prefer_binary(self):
+        # type: () -> None
+        self._candidate_prefs.prefer_binary = True
+
+    def make_link_evaluator(self, project_name):
+        # type: (str) -> LinkEvaluator
+        canonical_name = canonicalize_name(project_name)
+        formats = self.format_control.get_allowed_formats(canonical_name)
+
+        return LinkEvaluator(
+            project_name=project_name,
+            canonical_name=canonical_name,
+            formats=formats,
+            target_python=self._target_python,
+            allow_yanked=self._allow_yanked,
+            ignore_requires_python=self._ignore_requires_python,
+        )
+
+    def _sort_links(self, links):
+        # type: (Iterable[Link]) -> List[Link]
+        """
+        Returns elements of links in order, non-egg links first, egg links
+        second, while eliminating duplicates
+        """
+        eggs, no_eggs = [], []
+        seen = set()  # type: Set[Link]
+        for link in links:
+            if link not in seen:
+                seen.add(link)
+                if link.egg_fragment:
+                    eggs.append(link)
+                else:
+                    no_eggs.append(link)
+        return no_eggs + eggs
+
+    def _log_skipped_link(self, link, reason):
+        # type: (Link, Text) -> None
+        if link not in self._logged_links:
+            # Mark this as a unicode string to prevent "UnicodeEncodeError:
+            # 'ascii' codec can't encode character" in Python 2 when
+            # the reason contains non-ascii characters.
+            #   Also, put the link at the end so the reason is more visible
+            # and because the link string is usually very long.
+            logger.debug(u'Skipping link: %s: %s', reason, link)
+            self._logged_links.add(link)
+
+    def get_install_candidate(self, link_evaluator, link):
+        # type: (LinkEvaluator, Link) -> Optional[InstallationCandidate]
+        """
+        If the link is a candidate for install, convert it to an
+        InstallationCandidate and return it. Otherwise, return None.
+        """
+        is_candidate, result = link_evaluator.evaluate_link(link)
+        if not is_candidate:
+            if result:
+                self._log_skipped_link(link, reason=result)
+            return None
+
+        return InstallationCandidate(
+            name=link_evaluator.project_name,
+            link=link,
+            # Convert the Text result to str since InstallationCandidate
+            # accepts str.
+            version=str(result),
+        )
+
+    def evaluate_links(self, link_evaluator, links):
+        # type: (LinkEvaluator, Iterable[Link]) -> List[InstallationCandidate]
+        """
+        Convert links that are candidates to InstallationCandidate objects.
+        """
+        candidates = []
+        for link in self._sort_links(links):
+            candidate = self.get_install_candidate(link_evaluator, link)
+            if candidate is not None:
+                candidates.append(candidate)
+
+        return candidates
+
+    def process_project_url(self, project_url, link_evaluator):
+        # type: (Link, LinkEvaluator) -> List[InstallationCandidate]
+        logger.debug(
+            'Fetching project page and analyzing links: %s', project_url,
+        )
+        html_page = self._link_collector.fetch_page(project_url)
+        if html_page is None:
+            return []
+
+        page_links = list(parse_links(html_page))
+
+        with indent_log():
+            package_links = self.evaluate_links(
+                link_evaluator,
+                links=page_links,
+            )
+
+        return package_links
+
+    @lru_cache(maxsize=None)
+    def find_all_candidates(self, project_name):
+        # type: (str) -> List[InstallationCandidate]
+        """Find all available InstallationCandidate for project_name
+
+        This checks index_urls and find_links.
+        All versions found are returned as an InstallationCandidate list.
+
+        See LinkEvaluator.evaluate_link() for details on which files
+        are accepted.
+        """
+        collected_links = self._link_collector.collect_links(project_name)
+
+        link_evaluator = self.make_link_evaluator(project_name)
+
+        find_links_versions = self.evaluate_links(
+            link_evaluator,
+            links=collected_links.find_links,
+        )
+
+        page_versions = []
+        for project_url in collected_links.project_urls:
+            package_links = self.process_project_url(
+                project_url, link_evaluator=link_evaluator,
+            )
+            page_versions.extend(package_links)
+
+        file_versions = self.evaluate_links(
+            link_evaluator,
+            links=collected_links.files,
+        )
+        if file_versions:
+            file_versions.sort(reverse=True)
+            logger.debug(
+                'Local files found: %s',
+                ', '.join([
+                    url_to_path(candidate.link.url)
+                    for candidate in file_versions
+                ])
+            )
+
+        # This is an intentional priority ordering
+        return file_versions + find_links_versions + page_versions
+
+    def make_candidate_evaluator(
+        self,
+        project_name,    # type: str
+        specifier=None,  # type: Optional[specifiers.BaseSpecifier]
+        hashes=None,     # type: Optional[Hashes]
+    ):
+        # type: (...) -> CandidateEvaluator
+        """Create a CandidateEvaluator object to use.
+        """
+        candidate_prefs = self._candidate_prefs
+        return CandidateEvaluator.create(
+            project_name=project_name,
+            target_python=self._target_python,
+            prefer_binary=candidate_prefs.prefer_binary,
+            allow_all_prereleases=candidate_prefs.allow_all_prereleases,
+            specifier=specifier,
+            hashes=hashes,
+        )
+
+    def find_best_candidate(
+        self,
+        project_name,       # type: str
+        specifier=None,     # type: Optional[specifiers.BaseSpecifier]
+        hashes=None,        # type: Optional[Hashes]
+    ):
+        # type: (...) -> BestCandidateResult
+        """Find matches for the given project and specifier.
+
+        :param specifier: An optional object implementing `filter`
+            (e.g. `packaging.specifiers.SpecifierSet`) to filter applicable
+            versions.
+
+        :return: A `BestCandidateResult` instance.
+        """
+        candidates = self.find_all_candidates(project_name)
+        candidate_evaluator = self.make_candidate_evaluator(
+            project_name=project_name,
+            specifier=specifier,
+            hashes=hashes,
+        )
+        return candidate_evaluator.compute_best_candidate(candidates)
+
+    def find_requirement(self, req, upgrade):
+        # type: (InstallRequirement, bool) -> Optional[InstallationCandidate]
+        """Try to find a Link matching req
+
+        Expects req, an InstallRequirement and upgrade, a boolean
+        Returns a InstallationCandidate if found,
+        Raises DistributionNotFound or BestVersionAlreadyInstalled otherwise
+        """
+        hashes = req.hashes(trust_internet=False)
+        best_candidate_result = self.find_best_candidate(
+            req.name, specifier=req.specifier, hashes=hashes,
+        )
+        best_candidate = best_candidate_result.best_candidate
+
+        installed_version = None    # type: Optional[_BaseVersion]
+        if req.satisfied_by is not None:
+            installed_version = parse_version(req.satisfied_by.version)
+
+        def _format_versions(cand_iter):
+            # type: (Iterable[InstallationCandidate]) -> str
+            # This repeated parse_version and str() conversion is needed to
+            # handle different vendoring sources from pip and pkg_resources.
+            # If we stop using the pkg_resources provided specifier and start
+            # using our own, we can drop the cast to str().
+            return ", ".join(sorted(
+                {str(c.version) for c in cand_iter},
+                key=parse_version,
+            )) or "none"
+
+        if installed_version is None and best_candidate is None:
+            logger.critical(
+                'Could not find a version that satisfies the requirement %s '
+                '(from versions: %s)',
+                req,
+                _format_versions(best_candidate_result.iter_all()),
+            )
+
+            raise DistributionNotFound(
+                'No matching distribution found for {}'.format(
+                    req)
+            )
+
+        best_installed = False
+        if installed_version and (
+                best_candidate is None or
+                best_candidate.version <= installed_version):
+            best_installed = True
+
+        if not upgrade and installed_version is not None:
+            if best_installed:
+                logger.debug(
+                    'Existing installed version (%s) is most up-to-date and '
+                    'satisfies requirement',
+                    installed_version,
+                )
+            else:
+                logger.debug(
+                    'Existing installed version (%s) satisfies requirement '
+                    '(most up-to-date version is %s)',
+                    installed_version,
+                    best_candidate.version,
+                )
+            return None
+
+        if best_installed:
+            # We have an existing version, and its the best version
+            logger.debug(
+                'Installed version (%s) is most up-to-date (past versions: '
+                '%s)',
+                installed_version,
+                _format_versions(best_candidate_result.iter_applicable()),
+            )
+            raise BestVersionAlreadyInstalled
+
+        logger.debug(
+            'Using version %s (newest of versions: %s)',
+            best_candidate.version,
+            _format_versions(best_candidate_result.iter_applicable()),
+        )
+        return best_candidate
+
+
+def _find_name_version_sep(fragment, canonical_name):
+    # type: (str, str) -> int
+    """Find the separator's index based on the package's canonical name.
+
+    :param fragment: A <package>+<version> filename "fragment" (stem) or
+        egg fragment.
+    :param canonical_name: The package's canonical name.
+
+    This function is needed since the canonicalized name does not necessarily
+    have the same length as the egg info's name part. An example::
+
+    >>> fragment = 'foo__bar-1.0'
+    >>> canonical_name = 'foo-bar'
+    >>> _find_name_version_sep(fragment, canonical_name)
+    8
+    """
+    # Project name and version must be separated by one single dash. Find all
+    # occurrences of dashes; if the string in front of it matches the canonical
+    # name, this is the one separating the name and version parts.
+    for i, c in enumerate(fragment):
+        if c != "-":
+            continue
+        if canonicalize_name(fragment[:i]) == canonical_name:
+            return i
+    raise ValueError("{} does not match {}".format(fragment, canonical_name))
+
+
+def _extract_version_from_fragment(fragment, canonical_name):
+    # type: (str, str) -> Optional[str]
+    """Parse the version string from a <package>+<version> filename
+    "fragment" (stem) or egg fragment.
+
+    :param fragment: The string to parse. E.g. foo-2.1
+    :param canonical_name: The canonicalized name of the package this
+        belongs to.
+    """
+    try:
+        version_start = _find_name_version_sep(fragment, canonical_name) + 1
+    except ValueError:
+        return None
+    version = fragment[version_start:]
+    if not version:
+        return None
+    return version
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/locations.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/locations.py
new file mode 100644
index 0000000..0c12354
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/locations.py
@@ -0,0 +1,194 @@
+"""Locations where we look for configs, install stuff, etc"""
+
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+from __future__ import absolute_import
+
+import os
+import os.path
+import platform
+import site
+import sys
+import sysconfig
+from distutils import sysconfig as distutils_sysconfig
+from distutils.command.install import SCHEME_KEYS  # type: ignore
+from distutils.command.install import install as distutils_install_command
+
+from pip._internal.models.scheme import Scheme
+from pip._internal.utils import appdirs
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING, cast
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+if MYPY_CHECK_RUNNING:
+    from typing import Dict, List, Optional, Union
+
+    from distutils.cmd import Command as DistutilsCommand
+
+
+# Application Directories
+USER_CACHE_DIR = appdirs.user_cache_dir("pip")
+
+
+def get_major_minor_version():
+    # type: () -> str
+    """
+    Return the major-minor version of the current Python as a string, e.g.
+    "3.7" or "3.10".
+    """
+    return '{}.{}'.format(*sys.version_info)
+
+
+def get_src_prefix():
+    # type: () -> str
+    if running_under_virtualenv():
+        src_prefix = os.path.join(sys.prefix, 'src')
+    else:
+        # FIXME: keep src in cwd for now (it is not a temporary folder)
+        try:
+            src_prefix = os.path.join(os.getcwd(), 'src')
+        except OSError:
+            # In case the current working directory has been renamed or deleted
+            sys.exit(
+                "The folder you are executing pip from can no longer be found."
+            )
+
+    # under macOS + virtualenv sys.prefix is not properly resolved
+    # it is something like /path/to/python/bin/..
+    return os.path.abspath(src_prefix)
+
+
+# FIXME doesn't account for venv linked to global site-packages
+
+site_packages = sysconfig.get_path("purelib")  # type: Optional[str]
+
+# This is because of a bug in PyPy's sysconfig module, see
+# https://bitbucket.org/pypy/pypy/issues/2506/sysconfig-returns-incorrect-paths
+# for more information.
+if platform.python_implementation().lower() == "pypy":
+    site_packages = distutils_sysconfig.get_python_lib()
+try:
+    # Use getusersitepackages if this is present, as it ensures that the
+    # value is initialised properly.
+    user_site = site.getusersitepackages()
+except AttributeError:
+    user_site = site.USER_SITE
+
+if WINDOWS:
+    bin_py = os.path.join(sys.prefix, 'Scripts')
+    bin_user = os.path.join(user_site, 'Scripts')
+    # buildout uses 'bin' on Windows too?
+    if not os.path.exists(bin_py):
+        bin_py = os.path.join(sys.prefix, 'bin')
+        bin_user = os.path.join(user_site, 'bin')
+else:
+    bin_py = os.path.join(sys.prefix, 'bin')
+    bin_user = os.path.join(user_site, 'bin')
+
+    # Forcing to use /usr/local/bin for standard macOS framework installs
+    # Also log to ~/Library/Logs/ for use with the Console.app log viewer
+    if sys.platform[:6] == 'darwin' and sys.prefix[:16] == '/System/Library/':
+        bin_py = '/usr/local/bin'
+
+
+def distutils_scheme(
+    dist_name, user=False, home=None, root=None, isolated=False, prefix=None
+):
+    # type:(str, bool, str, str, bool, str) -> Dict[str, str]
+    """
+    Return a distutils install scheme
+    """
+    from distutils.dist import Distribution
+
+    dist_args = {'name': dist_name}  # type: Dict[str, Union[str, List[str]]]
+    if isolated:
+        dist_args["script_args"] = ["--no-user-cfg"]
+
+    d = Distribution(dist_args)
+    d.parse_config_files()
+    obj = None  # type: Optional[DistutilsCommand]
+    obj = d.get_command_obj('install', create=True)
+    assert obj is not None
+    i = cast(distutils_install_command, obj)
+    # NOTE: setting user or home has the side-effect of creating the home dir
+    # or user base for installations during finalize_options()
+    # ideally, we'd prefer a scheme class that has no side-effects.
+    assert not (user and prefix), "user={} prefix={}".format(user, prefix)
+    assert not (home and prefix), "home={} prefix={}".format(home, prefix)
+    i.user = user or i.user
+    if user or home:
+        i.prefix = ""
+    i.prefix = prefix or i.prefix
+    i.home = home or i.home
+    i.root = root or i.root
+    i.finalize_options()
+
+    scheme = {}
+    for key in SCHEME_KEYS:
+        scheme[key] = getattr(i, 'install_' + key)
+
+    # install_lib specified in setup.cfg should install *everything*
+    # into there (i.e. it takes precedence over both purelib and
+    # platlib).  Note, i.install_lib is *always* set after
+    # finalize_options(); we only want to override here if the user
+    # has explicitly requested it hence going back to the config
+    if 'install_lib' in d.get_option_dict('install'):
+        scheme.update(dict(purelib=i.install_lib, platlib=i.install_lib))
+
+    if running_under_virtualenv():
+        scheme['headers'] = os.path.join(
+            i.prefix,
+            'include',
+            'site',
+            'python{}'.format(get_major_minor_version()),
+            dist_name,
+        )
+
+        if root is not None:
+            path_no_drive = os.path.splitdrive(
+                os.path.abspath(scheme["headers"]))[1]
+            scheme["headers"] = os.path.join(
+                root,
+                path_no_drive[1:],
+            )
+
+    return scheme
+
+
+def get_scheme(
+    dist_name,  # type: str
+    user=False,  # type: bool
+    home=None,  # type: Optional[str]
+    root=None,  # type: Optional[str]
+    isolated=False,  # type: bool
+    prefix=None,  # type: Optional[str]
+):
+    # type: (...) -> Scheme
+    """
+    Get the "scheme" corresponding to the input parameters. The distutils
+    documentation provides the context for the available schemes:
+    https://docs.python.org/3/install/index.html#alternate-installation
+
+    :param dist_name: the name of the package to retrieve the scheme for, used
+        in the headers scheme path
+    :param user: indicates to use the "user" scheme
+    :param home: indicates to use the "home" scheme and provides the base
+        directory for the same
+    :param root: root under which other directories are re-based
+    :param isolated: equivalent to --no-user-cfg, i.e. do not consider
+        ~/.pydistutils.cfg (posix) or ~/pydistutils.cfg (non-posix) for
+        scheme paths
+    :param prefix: indicates to use the "prefix" scheme and provides the
+        base directory for the same
+    """
+    scheme = distutils_scheme(
+        dist_name, user, home, root, isolated, prefix
+    )
+    return Scheme(
+        platlib=scheme["platlib"],
+        purelib=scheme["purelib"],
+        headers=scheme["headers"],
+        scripts=scheme["scripts"],
+        data=scheme["data"],
+    )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/main.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/main.py
new file mode 100644
index 0000000..3208d5b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/main.py
@@ -0,0 +1,16 @@
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, List
+
+
+def main(args=None):
+    # type: (Optional[List[str]]) -> int
+    """This is preserved for old console scripts that may still be referencing
+    it.
+
+    For additional details, see https://github.com/pypa/pip/issues/7498.
+    """
+    from pip._internal.utils.entrypoints import _wrapper
+
+    return _wrapper(args)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/__init__.py
new file mode 100644
index 0000000..7855226
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/__init__.py
@@ -0,0 +1,2 @@
+"""A package that contains models that represent entities.
+"""
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/candidate.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/candidate.py
new file mode 100644
index 0000000..9149e0f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/candidate.py
@@ -0,0 +1,38 @@
+from pip._vendor.packaging.version import parse as parse_version
+
+from pip._internal.utils.models import KeyBasedCompareMixin
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from pip._vendor.packaging.version import _BaseVersion
+    from pip._internal.models.link import Link
+
+
+class InstallationCandidate(KeyBasedCompareMixin):
+    """Represents a potential "candidate" for installation.
+    """
+
+    __slots__ = ["name", "version", "link"]
+
+    def __init__(self, name, version, link):
+        # type: (str, str, Link) -> None
+        self.name = name
+        self.version = parse_version(version)  # type: _BaseVersion
+        self.link = link
+
+        super(InstallationCandidate, self).__init__(
+            key=(self.name, self.version, self.link),
+            defining_class=InstallationCandidate
+        )
+
+    def __repr__(self):
+        # type: () -> str
+        return "<InstallationCandidate({!r}, {!r}, {!r})>".format(
+            self.name, self.version, self.link,
+        )
+
+    def __str__(self):
+        # type: () -> str
+        return '{!r} candidate (version {} at {})'.format(
+            self.name, self.version, self.link,
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/direct_url.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/direct_url.py
new file mode 100644
index 0000000..87bd9fe
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/direct_url.py
@@ -0,0 +1,245 @@
+""" PEP 610 """
+import json
+import re
+
+from pip._vendor import six
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Dict, Iterable, Optional, Type, TypeVar, Union
+    )
+
+    T = TypeVar("T")
+
+
+DIRECT_URL_METADATA_NAME = "direct_url.json"
+ENV_VAR_RE = re.compile(r"^\$\{[A-Za-z0-9-_]+\}(:\$\{[A-Za-z0-9-_]+\})?$")
+
+__all__ = [
+    "DirectUrl",
+    "DirectUrlValidationError",
+    "DirInfo",
+    "ArchiveInfo",
+    "VcsInfo",
+]
+
+
+class DirectUrlValidationError(Exception):
+    pass
+
+
+def _get(d, expected_type, key, default=None):
+    # type: (Dict[str, Any], Type[T], str, Optional[T]) -> Optional[T]
+    """Get value from dictionary and verify expected type."""
+    if key not in d:
+        return default
+    value = d[key]
+    if six.PY2 and expected_type is str:
+        expected_type = six.string_types  # type: ignore
+    if not isinstance(value, expected_type):
+        raise DirectUrlValidationError(
+            "{!r} has unexpected type for {} (expected {})".format(
+                value, key, expected_type
+            )
+        )
+    return value
+
+
+def _get_required(d, expected_type, key, default=None):
+    # type: (Dict[str, Any], Type[T], str, Optional[T]) -> T
+    value = _get(d, expected_type, key, default)
+    if value is None:
+        raise DirectUrlValidationError("{} must have a value".format(key))
+    return value
+
+
+def _exactly_one_of(infos):
+    # type: (Iterable[Optional[InfoType]]) -> InfoType
+    infos = [info for info in infos if info is not None]
+    if not infos:
+        raise DirectUrlValidationError(
+            "missing one of archive_info, dir_info, vcs_info"
+        )
+    if len(infos) > 1:
+        raise DirectUrlValidationError(
+            "more than one of archive_info, dir_info, vcs_info"
+        )
+    assert infos[0] is not None
+    return infos[0]
+
+
+def _filter_none(**kwargs):
+    # type: (Any) -> Dict[str, Any]
+    """Make dict excluding None values."""
+    return {k: v for k, v in kwargs.items() if v is not None}
+
+
+class VcsInfo(object):
+    name = "vcs_info"
+
+    def __init__(
+        self,
+        vcs,  # type: str
+        commit_id,  # type: str
+        requested_revision=None,  # type: Optional[str]
+        resolved_revision=None,  # type: Optional[str]
+        resolved_revision_type=None,  # type: Optional[str]
+    ):
+        self.vcs = vcs
+        self.requested_revision = requested_revision
+        self.commit_id = commit_id
+        self.resolved_revision = resolved_revision
+        self.resolved_revision_type = resolved_revision_type
+
+    @classmethod
+    def _from_dict(cls, d):
+        # type: (Optional[Dict[str, Any]]) -> Optional[VcsInfo]
+        if d is None:
+            return None
+        return cls(
+            vcs=_get_required(d, str, "vcs"),
+            commit_id=_get_required(d, str, "commit_id"),
+            requested_revision=_get(d, str, "requested_revision"),
+            resolved_revision=_get(d, str, "resolved_revision"),
+            resolved_revision_type=_get(d, str, "resolved_revision_type"),
+        )
+
+    def _to_dict(self):
+        # type: () -> Dict[str, Any]
+        return _filter_none(
+            vcs=self.vcs,
+            requested_revision=self.requested_revision,
+            commit_id=self.commit_id,
+            resolved_revision=self.resolved_revision,
+            resolved_revision_type=self.resolved_revision_type,
+        )
+
+
+class ArchiveInfo(object):
+    name = "archive_info"
+
+    def __init__(
+        self,
+        hash=None,  # type: Optional[str]
+    ):
+        self.hash = hash
+
+    @classmethod
+    def _from_dict(cls, d):
+        # type: (Optional[Dict[str, Any]]) -> Optional[ArchiveInfo]
+        if d is None:
+            return None
+        return cls(hash=_get(d, str, "hash"))
+
+    def _to_dict(self):
+        # type: () -> Dict[str, Any]
+        return _filter_none(hash=self.hash)
+
+
+class DirInfo(object):
+    name = "dir_info"
+
+    def __init__(
+        self,
+        editable=False,  # type: bool
+    ):
+        self.editable = editable
+
+    @classmethod
+    def _from_dict(cls, d):
+        # type: (Optional[Dict[str, Any]]) -> Optional[DirInfo]
+        if d is None:
+            return None
+        return cls(
+            editable=_get_required(d, bool, "editable", default=False)
+        )
+
+    def _to_dict(self):
+        # type: () -> Dict[str, Any]
+        return _filter_none(editable=self.editable or None)
+
+
+if MYPY_CHECK_RUNNING:
+    InfoType = Union[ArchiveInfo, DirInfo, VcsInfo]
+
+
+class DirectUrl(object):
+
+    def __init__(
+        self,
+        url,  # type: str
+        info,  # type: InfoType
+        subdirectory=None,  # type: Optional[str]
+    ):
+        self.url = url
+        self.info = info
+        self.subdirectory = subdirectory
+
+    def _remove_auth_from_netloc(self, netloc):
+        # type: (str) -> str
+        if "@" not in netloc:
+            return netloc
+        user_pass, netloc_no_user_pass = netloc.split("@", 1)
+        if (
+            isinstance(self.info, VcsInfo) and
+            self.info.vcs == "git" and
+            user_pass == "git"
+        ):
+            return netloc
+        if ENV_VAR_RE.match(user_pass):
+            return netloc
+        return netloc_no_user_pass
+
+    @property
+    def redacted_url(self):
+        # type: () -> str
+        """url with user:password part removed unless it is formed with
+        environment variables as specified in PEP 610, or it is ``git``
+        in the case of a git URL.
+        """
+        purl = urllib_parse.urlsplit(self.url)
+        netloc = self._remove_auth_from_netloc(purl.netloc)
+        surl = urllib_parse.urlunsplit(
+            (purl.scheme, netloc, purl.path, purl.query, purl.fragment)
+        )
+        return surl
+
+    def validate(self):
+        # type: () -> None
+        self.from_dict(self.to_dict())
+
+    @classmethod
+    def from_dict(cls, d):
+        # type: (Dict[str, Any]) -> DirectUrl
+        return DirectUrl(
+            url=_get_required(d, str, "url"),
+            subdirectory=_get(d, str, "subdirectory"),
+            info=_exactly_one_of(
+                [
+                    ArchiveInfo._from_dict(_get(d, dict, "archive_info")),
+                    DirInfo._from_dict(_get(d, dict, "dir_info")),
+                    VcsInfo._from_dict(_get(d, dict, "vcs_info")),
+                ]
+            ),
+        )
+
+    def to_dict(self):
+        # type: () -> Dict[str, Any]
+        res = _filter_none(
+            url=self.redacted_url,
+            subdirectory=self.subdirectory,
+        )
+        res[self.info.name] = self.info._to_dict()
+        return res
+
+    @classmethod
+    def from_json(cls, s):
+        # type: (str) -> DirectUrl
+        return cls.from_dict(json.loads(s))
+
+    def to_json(self):
+        # type: () -> str
+        return json.dumps(self.to_dict(), sort_keys=True)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/format_control.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/format_control.py
new file mode 100644
index 0000000..c6275e7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/format_control.py
@@ -0,0 +1,92 @@
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.exceptions import CommandError
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Set, FrozenSet
+
+
+class FormatControl(object):
+    """Helper for managing formats from which a package can be installed.
+    """
+
+    __slots__ = ["no_binary", "only_binary"]
+
+    def __init__(self, no_binary=None, only_binary=None):
+        # type: (Optional[Set[str]], Optional[Set[str]]) -> None
+        if no_binary is None:
+            no_binary = set()
+        if only_binary is None:
+            only_binary = set()
+
+        self.no_binary = no_binary
+        self.only_binary = only_binary
+
+    def __eq__(self, other):
+        # type: (object) -> bool
+        if not isinstance(other, self.__class__):
+            return NotImplemented
+
+        if self.__slots__ != other.__slots__:
+            return False
+
+        return all(
+            getattr(self, k) == getattr(other, k)
+            for k in self.__slots__
+        )
+
+    def __ne__(self, other):
+        # type: (object) -> bool
+        return not self.__eq__(other)
+
+    def __repr__(self):
+        # type: () -> str
+        return "{}({}, {})".format(
+            self.__class__.__name__,
+            self.no_binary,
+            self.only_binary
+        )
+
+    @staticmethod
+    def handle_mutual_excludes(value, target, other):
+        # type: (str, Set[str], Set[str]) -> None
+        if value.startswith('-'):
+            raise CommandError(
+                "--no-binary / --only-binary option requires 1 argument."
+            )
+        new = value.split(',')
+        while ':all:' in new:
+            other.clear()
+            target.clear()
+            target.add(':all:')
+            del new[:new.index(':all:') + 1]
+            # Without a none, we want to discard everything as :all: covers it
+            if ':none:' not in new:
+                return
+        for name in new:
+            if name == ':none:':
+                target.clear()
+                continue
+            name = canonicalize_name(name)
+            other.discard(name)
+            target.add(name)
+
+    def get_allowed_formats(self, canonical_name):
+        # type: (str) -> FrozenSet[str]
+        result = {"binary", "source"}
+        if canonical_name in self.only_binary:
+            result.discard('source')
+        elif canonical_name in self.no_binary:
+            result.discard('binary')
+        elif ':all:' in self.only_binary:
+            result.discard('source')
+        elif ':all:' in self.no_binary:
+            result.discard('binary')
+        return frozenset(result)
+
+    def disallow_binaries(self):
+        # type: () -> None
+        self.handle_mutual_excludes(
+            ':all:', self.no_binary, self.only_binary,
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/index.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/index.py
new file mode 100644
index 0000000..5b4a1fe
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/index.py
@@ -0,0 +1,34 @@
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+
+class PackageIndex(object):
+    """Represents a Package Index and provides easier access to endpoints
+    """
+
+    __slots__ = ['url', 'netloc', 'simple_url', 'pypi_url',
+                 'file_storage_domain']
+
+    def __init__(self, url, file_storage_domain):
+        # type: (str, str) -> None
+        super(PackageIndex, self).__init__()
+        self.url = url
+        self.netloc = urllib_parse.urlsplit(url).netloc
+        self.simple_url = self._url_for_path('simple')
+        self.pypi_url = self._url_for_path('pypi')
+
+        # This is part of a temporary hack used to block installs of PyPI
+        # packages which depend on external urls only necessary until PyPI can
+        # block such packages themselves
+        self.file_storage_domain = file_storage_domain
+
+    def _url_for_path(self, path):
+        # type: (str) -> str
+        return urllib_parse.urljoin(self.url, path)
+
+
+PyPI = PackageIndex(
+    'https://pypi.org/', file_storage_domain='files.pythonhosted.org'
+)
+TestPyPI = PackageIndex(
+    'https://test.pypi.org/', file_storage_domain='test-files.pythonhosted.org'
+)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/link.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/link.py
new file mode 100644
index 0000000..c0d278a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/link.py
@@ -0,0 +1,245 @@
+import os
+import posixpath
+import re
+
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.utils.filetypes import WHEEL_EXTENSION
+from pip._internal.utils.misc import (
+    redact_auth_from_url,
+    split_auth_from_netloc,
+    splitext,
+)
+from pip._internal.utils.models import KeyBasedCompareMixin
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.urls import path_to_url, url_to_path
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Text, Tuple, Union
+    from pip._internal.index.collector import HTMLPage
+    from pip._internal.utils.hashes import Hashes
+
+
+class Link(KeyBasedCompareMixin):
+    """Represents a parsed link from a Package Index's simple URL
+    """
+
+    __slots__ = [
+        "_parsed_url",
+        "_url",
+        "comes_from",
+        "requires_python",
+        "yanked_reason",
+        "cache_link_parsing",
+    ]
+
+    def __init__(
+        self,
+        url,                   # type: str
+        comes_from=None,       # type: Optional[Union[str, HTMLPage]]
+        requires_python=None,  # type: Optional[str]
+        yanked_reason=None,    # type: Optional[Text]
+        cache_link_parsing=True,  # type: bool
+    ):
+        # type: (...) -> None
+        """
+        :param url: url of the resource pointed to (href of the link)
+        :param comes_from: instance of HTMLPage where the link was found,
+            or string.
+        :param requires_python: String containing the `Requires-Python`
+            metadata field, specified in PEP 345. This may be specified by
+            a data-requires-python attribute in the HTML link tag, as
+            described in PEP 503.
+        :param yanked_reason: the reason the file has been yanked, if the
+            file has been yanked, or None if the file hasn't been yanked.
+            This is the value of the "data-yanked" attribute, if present, in
+            a simple repository HTML link. If the file has been yanked but
+            no reason was provided, this should be the empty string. See
+            PEP 592 for more information and the specification.
+        :param cache_link_parsing: A flag that is used elsewhere to determine
+                                   whether resources retrieved from this link
+                                   should be cached. PyPI index urls should
+                                   generally have this set to False, for
+                                   example.
+        """
+
+        # url can be a UNC windows share
+        if url.startswith('\\\\'):
+            url = path_to_url(url)
+
+        self._parsed_url = urllib_parse.urlsplit(url)
+        # Store the url as a private attribute to prevent accidentally
+        # trying to set a new value.
+        self._url = url
+
+        self.comes_from = comes_from
+        self.requires_python = requires_python if requires_python else None
+        self.yanked_reason = yanked_reason
+
+        super(Link, self).__init__(key=url, defining_class=Link)
+
+        self.cache_link_parsing = cache_link_parsing
+
+    def __str__(self):
+        # type: () -> str
+        if self.requires_python:
+            rp = ' (requires-python:{})'.format(self.requires_python)
+        else:
+            rp = ''
+        if self.comes_from:
+            return '{} (from {}){}'.format(
+                redact_auth_from_url(self._url), self.comes_from, rp)
+        else:
+            return redact_auth_from_url(str(self._url))
+
+    def __repr__(self):
+        # type: () -> str
+        return '<Link {}>'.format(self)
+
+    @property
+    def url(self):
+        # type: () -> str
+        return self._url
+
+    @property
+    def filename(self):
+        # type: () -> str
+        path = self.path.rstrip('/')
+        name = posixpath.basename(path)
+        if not name:
+            # Make sure we don't leak auth information if the netloc
+            # includes a username and password.
+            netloc, user_pass = split_auth_from_netloc(self.netloc)
+            return netloc
+
+        name = urllib_parse.unquote(name)
+        assert name, (
+            'URL {self._url!r} produced no filename'.format(**locals()))
+        return name
+
+    @property
+    def file_path(self):
+        # type: () -> str
+        return url_to_path(self.url)
+
+    @property
+    def scheme(self):
+        # type: () -> str
+        return self._parsed_url.scheme
+
+    @property
+    def netloc(self):
+        # type: () -> str
+        """
+        This can contain auth information.
+        """
+        return self._parsed_url.netloc
+
+    @property
+    def path(self):
+        # type: () -> str
+        return urllib_parse.unquote(self._parsed_url.path)
+
+    def splitext(self):
+        # type: () -> Tuple[str, str]
+        return splitext(posixpath.basename(self.path.rstrip('/')))
+
+    @property
+    def ext(self):
+        # type: () -> str
+        return self.splitext()[1]
+
+    @property
+    def url_without_fragment(self):
+        # type: () -> str
+        scheme, netloc, path, query, fragment = self._parsed_url
+        return urllib_parse.urlunsplit((scheme, netloc, path, query, None))
+
+    _egg_fragment_re = re.compile(r'[#&]egg=([^&]*)')
+
+    @property
+    def egg_fragment(self):
+        # type: () -> Optional[str]
+        match = self._egg_fragment_re.search(self._url)
+        if not match:
+            return None
+        return match.group(1)
+
+    _subdirectory_fragment_re = re.compile(r'[#&]subdirectory=([^&]*)')
+
+    @property
+    def subdirectory_fragment(self):
+        # type: () -> Optional[str]
+        match = self._subdirectory_fragment_re.search(self._url)
+        if not match:
+            return None
+        return match.group(1)
+
+    _hash_re = re.compile(
+        r'(sha1|sha224|sha384|sha256|sha512|md5)=([a-f0-9]+)'
+    )
+
+    @property
+    def hash(self):
+        # type: () -> Optional[str]
+        match = self._hash_re.search(self._url)
+        if match:
+            return match.group(2)
+        return None
+
+    @property
+    def hash_name(self):
+        # type: () -> Optional[str]
+        match = self._hash_re.search(self._url)
+        if match:
+            return match.group(1)
+        return None
+
+    @property
+    def show_url(self):
+        # type: () -> str
+        return posixpath.basename(self._url.split('#', 1)[0].split('?', 1)[0])
+
+    @property
+    def is_file(self):
+        # type: () -> bool
+        return self.scheme == 'file'
+
+    def is_existing_dir(self):
+        # type: () -> bool
+        return self.is_file and os.path.isdir(self.file_path)
+
+    @property
+    def is_wheel(self):
+        # type: () -> bool
+        return self.ext == WHEEL_EXTENSION
+
+    @property
+    def is_vcs(self):
+        # type: () -> bool
+        from pip._internal.vcs import vcs
+
+        return self.scheme in vcs.all_schemes
+
+    @property
+    def is_yanked(self):
+        # type: () -> bool
+        return self.yanked_reason is not None
+
+    @property
+    def has_hash(self):
+        # type: () -> bool
+        return self.hash_name is not None
+
+    def is_hash_allowed(self, hashes):
+        # type: (Optional[Hashes]) -> bool
+        """
+        Return True if the link has a hash and it is allowed.
+        """
+        if hashes is None or not self.has_hash:
+            return False
+        # Assert non-None so mypy knows self.hash_name and self.hash are str.
+        assert self.hash_name is not None
+        assert self.hash is not None
+
+        return hashes.is_hash_allowed(self.hash_name, hex_digest=self.hash)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/scheme.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/scheme.py
new file mode 100644
index 0000000..5040551
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/scheme.py
@@ -0,0 +1,31 @@
+"""
+For types associated with installation schemes.
+
+For a general overview of available schemes and their context, see
+https://docs.python.org/3/install/index.html#alternate-installation.
+"""
+
+
+SCHEME_KEYS = ['platlib', 'purelib', 'headers', 'scripts', 'data']
+
+
+class Scheme(object):
+    """A Scheme holds paths which are used as the base directories for
+    artifacts associated with a Python package.
+    """
+
+    __slots__ = SCHEME_KEYS
+
+    def __init__(
+        self,
+        platlib,  # type: str
+        purelib,  # type: str
+        headers,  # type: str
+        scripts,  # type: str
+        data,  # type: str
+    ):
+        self.platlib = platlib
+        self.purelib = purelib
+        self.headers = headers
+        self.scripts = scripts
+        self.data = data
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/search_scope.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/search_scope.py
new file mode 100644
index 0000000..d732504
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/search_scope.py
@@ -0,0 +1,135 @@
+import itertools
+import logging
+import os
+import posixpath
+
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.models.index import PyPI
+from pip._internal.utils.compat import has_tls
+from pip._internal.utils.misc import normalize_path, redact_auth_from_url
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List
+
+
+logger = logging.getLogger(__name__)
+
+
+class SearchScope(object):
+
+    """
+    Encapsulates the locations that pip is configured to search.
+    """
+
+    __slots__ = ["find_links", "index_urls"]
+
+    @classmethod
+    def create(
+        cls,
+        find_links,  # type: List[str]
+        index_urls,  # type: List[str]
+    ):
+        # type: (...) -> SearchScope
+        """
+        Create a SearchScope object after normalizing the `find_links`.
+        """
+        # Build find_links. If an argument starts with ~, it may be
+        # a local file relative to a home directory. So try normalizing
+        # it and if it exists, use the normalized version.
+        # This is deliberately conservative - it might be fine just to
+        # blindly normalize anything starting with a ~...
+        built_find_links = []  # type: List[str]
+        for link in find_links:
+            if link.startswith('~'):
+                new_link = normalize_path(link)
+                if os.path.exists(new_link):
+                    link = new_link
+            built_find_links.append(link)
+
+        # If we don't have TLS enabled, then WARN if anyplace we're looking
+        # relies on TLS.
+        if not has_tls():
+            for link in itertools.chain(index_urls, built_find_links):
+                parsed = urllib_parse.urlparse(link)
+                if parsed.scheme == 'https':
+                    logger.warning(
+                        'pip is configured with locations that require '
+                        'TLS/SSL, however the ssl module in Python is not '
+                        'available.'
+                    )
+                    break
+
+        return cls(
+            find_links=built_find_links,
+            index_urls=index_urls,
+        )
+
+    def __init__(
+        self,
+        find_links,  # type: List[str]
+        index_urls,  # type: List[str]
+    ):
+        # type: (...) -> None
+        self.find_links = find_links
+        self.index_urls = index_urls
+
+    def get_formatted_locations(self):
+        # type: () -> str
+        lines = []
+        redacted_index_urls = []
+        if self.index_urls and self.index_urls != [PyPI.simple_url]:
+            for url in self.index_urls:
+
+                redacted_index_url = redact_auth_from_url(url)
+
+                # Parse the URL
+                purl = urllib_parse.urlsplit(redacted_index_url)
+
+                # URL is generally invalid if scheme and netloc is missing
+                # there are issues with Python and URL parsing, so this test
+                # is a bit crude. See bpo-20271, bpo-23505. Python doesn't
+                # always parse invalid URLs correctly - it should raise
+                # exceptions for malformed URLs
+                if not purl.scheme and not purl.netloc:
+                    logger.warning(
+                        'The index url "%s" seems invalid, '
+                        'please provide a scheme.', redacted_index_url)
+
+                redacted_index_urls.append(redacted_index_url)
+
+            lines.append('Looking in indexes: {}'.format(
+                ', '.join(redacted_index_urls)))
+
+        if self.find_links:
+            lines.append(
+                'Looking in links: {}'.format(', '.join(
+                    redact_auth_from_url(url) for url in self.find_links))
+            )
+        return '\n'.join(lines)
+
+    def get_index_urls_locations(self, project_name):
+        # type: (str) -> List[str]
+        """Returns the locations found via self.index_urls
+
+        Checks the url_name on the main (first in the list) index and
+        use this url_name to produce all locations
+        """
+
+        def mkurl_pypi_url(url):
+            # type: (str) -> str
+            loc = posixpath.join(
+                url,
+                urllib_parse.quote(canonicalize_name(project_name)))
+            # For maximum compatibility with easy_install, ensure the path
+            # ends in a trailing slash.  Although this isn't in the spec
+            # (and PyPI can handle it without the slash) some other index
+            # implementations might break if they relied on easy_install's
+            # behavior.
+            if not loc.endswith('/'):
+                loc = loc + '/'
+            return loc
+
+        return [mkurl_pypi_url(url) for url in self.index_urls]
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/selection_prefs.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/selection_prefs.py
new file mode 100644
index 0000000..5db3ca9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/selection_prefs.py
@@ -0,0 +1,49 @@
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional
+    from pip._internal.models.format_control import FormatControl
+
+
+class SelectionPreferences(object):
+    """
+    Encapsulates the candidate selection preferences for downloading
+    and installing files.
+    """
+
+    __slots__ = ['allow_yanked', 'allow_all_prereleases', 'format_control',
+                 'prefer_binary', 'ignore_requires_python']
+
+    # Don't include an allow_yanked default value to make sure each call
+    # site considers whether yanked releases are allowed. This also causes
+    # that decision to be made explicit in the calling code, which helps
+    # people when reading the code.
+    def __init__(
+        self,
+        allow_yanked,  # type: bool
+        allow_all_prereleases=False,  # type: bool
+        format_control=None,          # type: Optional[FormatControl]
+        prefer_binary=False,          # type: bool
+        ignore_requires_python=None,  # type: Optional[bool]
+    ):
+        # type: (...) -> None
+        """Create a SelectionPreferences object.
+
+        :param allow_yanked: Whether files marked as yanked (in the sense
+            of PEP 592) are permitted to be candidates for install.
+        :param format_control: A FormatControl object or None. Used to control
+            the selection of source packages / binary packages when consulting
+            the index and links.
+        :param prefer_binary: Whether to prefer an old, but valid, binary
+            dist over a new source dist.
+        :param ignore_requires_python: Whether to ignore incompatible
+            "Requires-Python" values in links. Defaults to False.
+        """
+        if ignore_requires_python is None:
+            ignore_requires_python = False
+
+        self.allow_yanked = allow_yanked
+        self.allow_all_prereleases = allow_all_prereleases
+        self.format_control = format_control
+        self.prefer_binary = prefer_binary
+        self.ignore_requires_python = ignore_requires_python
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/target_python.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/target_python.py
new file mode 100644
index 0000000..6d1ca79
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/target_python.py
@@ -0,0 +1,120 @@
+import sys
+
+from pip._internal.utils.compatibility_tags import (
+    get_supported,
+    version_info_to_nodot,
+)
+from pip._internal.utils.misc import normalize_version_info
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional, Tuple
+
+    from pip._vendor.packaging.tags import Tag
+
+
+class TargetPython(object):
+
+    """
+    Encapsulates the properties of a Python interpreter one is targeting
+    for a package install, download, etc.
+    """
+
+    __slots__ = [
+        "_given_py_version_info",
+        "abi",
+        "implementation",
+        "platform",
+        "py_version",
+        "py_version_info",
+        "_valid_tags",
+    ]
+
+    def __init__(
+        self,
+        platform=None,  # type: Optional[str]
+        py_version_info=None,  # type: Optional[Tuple[int, ...]]
+        abi=None,  # type: Optional[str]
+        implementation=None,  # type: Optional[str]
+    ):
+        # type: (...) -> None
+        """
+        :param platform: A string or None. If None, searches for packages
+            that are supported by the current system. Otherwise, will find
+            packages that can be built on the platform passed in. These
+            packages will only be downloaded for distribution: they will
+            not be built locally.
+        :param py_version_info: An optional tuple of ints representing the
+            Python version information to use (e.g. `sys.version_info[:3]`).
+            This can have length 1, 2, or 3 when provided.
+        :param abi: A string or None. This is passed to compatibility_tags.py's
+            get_supported() function as is.
+        :param implementation: A string or None. This is passed to
+            compatibility_tags.py's get_supported() function as is.
+        """
+        # Store the given py_version_info for when we call get_supported().
+        self._given_py_version_info = py_version_info
+
+        if py_version_info is None:
+            py_version_info = sys.version_info[:3]
+        else:
+            py_version_info = normalize_version_info(py_version_info)
+
+        py_version = '.'.join(map(str, py_version_info[:2]))
+
+        self.abi = abi
+        self.implementation = implementation
+        self.platform = platform
+        self.py_version = py_version
+        self.py_version_info = py_version_info
+
+        # This is used to cache the return value of get_tags().
+        self._valid_tags = None  # type: Optional[List[Tag]]
+
+    def format_given(self):
+        # type: () -> str
+        """
+        Format the given, non-None attributes for display.
+        """
+        display_version = None
+        if self._given_py_version_info is not None:
+            display_version = '.'.join(
+                str(part) for part in self._given_py_version_info
+            )
+
+        key_values = [
+            ('platform', self.platform),
+            ('version_info', display_version),
+            ('abi', self.abi),
+            ('implementation', self.implementation),
+        ]
+        return ' '.join(
+            '{}={!r}'.format(key, value) for key, value in key_values
+            if value is not None
+        )
+
+    def get_tags(self):
+        # type: () -> List[Tag]
+        """
+        Return the supported PEP 425 tags to check wheel candidates against.
+
+        The tags are returned in order of preference (most preferred first).
+        """
+        if self._valid_tags is None:
+            # Pass versions=None if no py_version_info was given since
+            # versions=None uses special default logic.
+            py_version_info = self._given_py_version_info
+            if py_version_info is None:
+                version = None
+            else:
+                version = version_info_to_nodot(py_version_info)
+
+            tags = get_supported(
+                version=version,
+                platform=self.platform,
+                abi=self.abi,
+                impl=self.implementation,
+            )
+            self._valid_tags = tags
+
+        return self._valid_tags
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/wheel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/wheel.py
new file mode 100644
index 0000000..4d4068f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/models/wheel.py
@@ -0,0 +1,78 @@
+"""Represents a wheel file and provides access to the various parts of the
+name that have meaning.
+"""
+import re
+
+from pip._vendor.packaging.tags import Tag
+
+from pip._internal.exceptions import InvalidWheelFilename
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List
+
+
+class Wheel(object):
+    """A wheel file"""
+
+    wheel_file_re = re.compile(
+        r"""^(?P<namever>(?P<name>.+?)-(?P<ver>.*?))
+        ((-(?P<build>\d[^-]*?))?-(?P<pyver>.+?)-(?P<abi>.+?)-(?P<plat>.+?)
+        \.whl|\.dist-info)$""",
+        re.VERBOSE
+    )
+
+    def __init__(self, filename):
+        # type: (str) -> None
+        """
+        :raises InvalidWheelFilename: when the filename is invalid for a wheel
+        """
+        wheel_info = self.wheel_file_re.match(filename)
+        if not wheel_info:
+            raise InvalidWheelFilename(
+                "{} is not a valid wheel filename.".format(filename)
+            )
+        self.filename = filename
+        self.name = wheel_info.group('name').replace('_', '-')
+        # we'll assume "_" means "-" due to wheel naming scheme
+        # (https://github.com/pypa/pip/issues/1150)
+        self.version = wheel_info.group('ver').replace('_', '-')
+        self.build_tag = wheel_info.group('build')
+        self.pyversions = wheel_info.group('pyver').split('.')
+        self.abis = wheel_info.group('abi').split('.')
+        self.plats = wheel_info.group('plat').split('.')
+
+        # All the tag combinations from this file
+        self.file_tags = {
+            Tag(x, y, z) for x in self.pyversions
+            for y in self.abis for z in self.plats
+        }
+
+    def get_formatted_file_tags(self):
+        # type: () -> List[str]
+        """Return the wheel's tags as a sorted list of strings."""
+        return sorted(str(tag) for tag in self.file_tags)
+
+    def support_index_min(self, tags):
+        # type: (List[Tag]) -> int
+        """Return the lowest index that one of the wheel's file_tag combinations
+        achieves in the given list of supported tags.
+
+        For example, if there are 8 supported tags and one of the file tags
+        is first in the list, then return 0.
+
+        :param tags: the PEP 425 tags to check the wheel against, in order
+            with most preferred first.
+
+        :raises ValueError: If none of the wheel's file tags match one of
+            the supported tags.
+        """
+        return min(tags.index(tag) for tag in self.file_tags if tag in tags)
+
+    def supported(self, tags):
+        # type: (List[Tag]) -> bool
+        """Return whether the wheel is compatible with one of the given tags.
+
+        :param tags: the PEP 425 tags to check the wheel against.
+        """
+        return not self.file_tags.isdisjoint(tags)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/__init__.py
new file mode 100644
index 0000000..b51bde9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/__init__.py
@@ -0,0 +1,2 @@
+"""Contains purely network-related utilities.
+"""
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/__pycache__/__init__.cpython-38.pyc
new file mode 100644
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/auth.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/auth.py
new file mode 100644
index 0000000..c49deaa
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/auth.py
@@ -0,0 +1,310 @@
+"""Network Authentication Helpers
+
+Contains interface (MultiDomainBasicAuth) and associated glue code for
+providing credentials in the context of network requests.
+"""
+
+import logging
+
+from pip._vendor.requests.auth import AuthBase, HTTPBasicAuth
+from pip._vendor.requests.utils import get_netrc_auth
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.utils.misc import (
+    ask,
+    ask_input,
+    ask_password,
+    remove_auth_from_url,
+    split_auth_netloc_from_url,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Dict, Optional, Tuple, List, Any
+
+    from pip._internal.vcs.versioncontrol import AuthInfo
+
+    from pip._vendor.requests.models import Response, Request
+
+    Credentials = Tuple[str, str, str]
+
+logger = logging.getLogger(__name__)
+
+try:
+    import keyring  # noqa
+except ImportError:
+    keyring = None
+except Exception as exc:
+    logger.warning(
+        "Keyring is skipped due to an exception: %s", str(exc),
+    )
+    keyring = None
+
+
+def get_keyring_auth(url, username):
+    # type: (str, str) -> Optional[AuthInfo]
+    """Return the tuple auth for a given url from keyring."""
+    global keyring
+    if not url or not keyring:
+        return None
+
+    try:
+        try:
+            get_credential = keyring.get_credential
+        except AttributeError:
+            pass
+        else:
+            logger.debug("Getting credentials from keyring for %s", url)
+            cred = get_credential(url, username)
+            if cred is not None:
+                return cred.username, cred.password
+            return None
+
+        if username:
+            logger.debug("Getting password from keyring for %s", url)
+            password = keyring.get_password(url, username)
+            if password:
+                return username, password
+
+    except Exception as exc:
+        logger.warning(
+            "Keyring is skipped due to an exception: %s", str(exc),
+        )
+        keyring = None
+    return None
+
+
+class MultiDomainBasicAuth(AuthBase):
+
+    def __init__(self, prompting=True, index_urls=None):
+        # type: (bool, Optional[List[str]]) -> None
+        self.prompting = prompting
+        self.index_urls = index_urls
+        self.passwords = {}  # type: Dict[str, AuthInfo]
+        # When the user is prompted to enter credentials and keyring is
+        # available, we will offer to save them. If the user accepts,
+        # this value is set to the credentials they entered. After the
+        # request authenticates, the caller should call
+        # ``save_credentials`` to save these.
+        self._credentials_to_save = None  # type: Optional[Credentials]
+
+    def _get_index_url(self, url):
+        # type: (str) -> Optional[str]
+        """Return the original index URL matching the requested URL.
+
+        Cached or dynamically generated credentials may work against
+        the original index URL rather than just the netloc.
+
+        The provided url should have had its username and password
+        removed already. If the original index url had credentials then
+        they will be included in the return value.
+
+        Returns None if no matching index was found, or if --no-index
+        was specified by the user.
+        """
+        if not url or not self.index_urls:
+            return None
+
+        for u in self.index_urls:
+            prefix = remove_auth_from_url(u).rstrip("/") + "/"
+            if url.startswith(prefix):
+                return u
+        return None
+
+    def _get_new_credentials(self, original_url, allow_netrc=True,
+                             allow_keyring=True):
+        # type: (str, bool, bool) -> AuthInfo
+        """Find and return credentials for the specified URL."""
+        # Split the credentials and netloc from the url.
+        url, netloc, url_user_password = split_auth_netloc_from_url(
+            original_url,
+        )
+
+        # Start with the credentials embedded in the url
+        username, password = url_user_password
+        if username is not None and password is not None:
+            logger.debug("Found credentials in url for %s", netloc)
+            return url_user_password
+
+        # Find a matching index url for this request
+        index_url = self._get_index_url(url)
+        if index_url:
+            # Split the credentials from the url.
+            index_info = split_auth_netloc_from_url(index_url)
+            if index_info:
+                index_url, _, index_url_user_password = index_info
+                logger.debug("Found index url %s", index_url)
+
+        # If an index URL was found, try its embedded credentials
+        if index_url and index_url_user_password[0] is not None:
+            username, password = index_url_user_password
+            if username is not None and password is not None:
+                logger.debug("Found credentials in index url for %s", netloc)
+                return index_url_user_password
+
+        # Get creds from netrc if we still don't have them
+        if allow_netrc:
+            netrc_auth = get_netrc_auth(original_url)
+            if netrc_auth:
+                logger.debug("Found credentials in netrc for %s", netloc)
+                return netrc_auth
+
+        # If we don't have a password and keyring is available, use it.
+        if allow_keyring:
+            # The index url is more specific than the netloc, so try it first
+            kr_auth = (
+                get_keyring_auth(index_url, username) or
+                get_keyring_auth(netloc, username)
+            )
+            if kr_auth:
+                logger.debug("Found credentials in keyring for %s", netloc)
+                return kr_auth
+
+        return username, password
+
+    def _get_url_and_credentials(self, original_url):
+        # type: (str) -> Tuple[str, Optional[str], Optional[str]]
+        """Return the credentials to use for the provided URL.
+
+        If allowed, netrc and keyring may be used to obtain the
+        correct credentials.
+
+        Returns (url_without_credentials, username, password). Note
+        that even if the original URL contains credentials, this
+        function may return a different username and password.
+        """
+        url, netloc, _ = split_auth_netloc_from_url(original_url)
+
+        # Use any stored credentials that we have for this netloc
+        username, password = self.passwords.get(netloc, (None, None))
+
+        if username is None and password is None:
+            # No stored credentials. Acquire new credentials without prompting
+            # the user. (e.g. from netrc, keyring, or the URL itself)
+            username, password = self._get_new_credentials(original_url)
+
+        if username is not None or password is not None:
+            # Convert the username and password if they're None, so that
+            # this netloc will show up as "cached" in the conditional above.
+            # Further, HTTPBasicAuth doesn't accept None, so it makes sense to
+            # cache the value that is going to be used.
+            username = username or ""
+            password = password or ""
+
+            # Store any acquired credentials.
+            self.passwords[netloc] = (username, password)
+
+        assert (
+            # Credentials were found
+            (username is not None and password is not None) or
+            # Credentials were not found
+            (username is None and password is None)
+        ), "Could not load credentials from url: {}".format(original_url)
+
+        return url, username, password
+
+    def __call__(self, req):
+        # type: (Request) -> Request
+        # Get credentials for this request
+        url, username, password = self._get_url_and_credentials(req.url)
+
+        # Set the url of the request to the url without any credentials
+        req.url = url
+
+        if username is not None and password is not None:
+            # Send the basic auth with this request
+            req = HTTPBasicAuth(username, password)(req)
+
+        # Attach a hook to handle 401 responses
+        req.register_hook("response", self.handle_401)
+
+        return req
+
+    # Factored out to allow for easy patching in tests
+    def _prompt_for_password(self, netloc):
+        # type: (str) -> Tuple[Optional[str], Optional[str], bool]
+        username = ask_input("User for {}: ".format(netloc))
+        if not username:
+            return None, None, False
+        auth = get_keyring_auth(netloc, username)
+        if auth and auth[0] is not None and auth[1] is not None:
+            return auth[0], auth[1], False
+        password = ask_password("Password: ")
+        return username, password, True
+
+    # Factored out to allow for easy patching in tests
+    def _should_save_password_to_keyring(self):
+        # type: () -> bool
+        if not keyring:
+            return False
+        return ask("Save credentials to keyring [y/N]: ", ["y", "n"]) == "y"
+
+    def handle_401(self, resp, **kwargs):
+        # type: (Response, **Any) -> Response
+        # We only care about 401 responses, anything else we want to just
+        #   pass through the actual response
+        if resp.status_code != 401:
+            return resp
+
+        # We are not able to prompt the user so simply return the response
+        if not self.prompting:
+            return resp
+
+        parsed = urllib_parse.urlparse(resp.url)
+
+        # Prompt the user for a new username and password
+        username, password, save = self._prompt_for_password(parsed.netloc)
+
+        # Store the new username and password to use for future requests
+        self._credentials_to_save = None
+        if username is not None and password is not None:
+            self.passwords[parsed.netloc] = (username, password)
+
+            # Prompt to save the password to keyring
+            if save and self._should_save_password_to_keyring():
+                self._credentials_to_save = (parsed.netloc, username, password)
+
+        # Consume content and release the original connection to allow our new
+        #   request to reuse the same one.
+        resp.content
+        resp.raw.release_conn()
+
+        # Add our new username and password to the request
+        req = HTTPBasicAuth(username or "", password or "")(resp.request)
+        req.register_hook("response", self.warn_on_401)
+
+        # On successful request, save the credentials that were used to
+        # keyring. (Note that if the user responded "no" above, this member
+        # is not set and nothing will be saved.)
+        if self._credentials_to_save:
+            req.register_hook("response", self.save_credentials)
+
+        # Send our new request
+        new_resp = resp.connection.send(req, **kwargs)
+        new_resp.history.append(resp)
+
+        return new_resp
+
+    def warn_on_401(self, resp, **kwargs):
+        # type: (Response, **Any) -> None
+        """Response callback to warn about incorrect credentials."""
+        if resp.status_code == 401:
+            logger.warning(
+                '401 Error, Credentials not correct for %s', resp.request.url,
+            )
+
+    def save_credentials(self, resp, **kwargs):
+        # type: (Response, **Any) -> None
+        """Response callback to save credentials on success."""
+        assert keyring is not None, "should never reach here without keyring"
+        if not keyring:
+            return
+
+        creds = self._credentials_to_save
+        self._credentials_to_save = None
+        if creds and resp.status_code < 400:
+            try:
+                logger.info('Saving credentials to keyring')
+                keyring.set_password(*creds)
+            except Exception:
+                logger.exception('Failed to save credentials')
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/cache.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/cache.py
new file mode 100644
index 0000000..a0d55b5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/cache.py
@@ -0,0 +1,79 @@
+"""HTTP cache implementation.
+"""
+
+import os
+from contextlib import contextmanager
+
+from pip._vendor.cachecontrol.cache import BaseCache
+from pip._vendor.cachecontrol.caches import FileCache
+from pip._vendor.requests.models import Response
+
+from pip._internal.utils.filesystem import adjacent_tmp_file, replace
+from pip._internal.utils.misc import ensure_dir
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Iterator
+
+
+def is_from_cache(response):
+    # type: (Response) -> bool
+    return getattr(response, "from_cache", False)
+
+
+@contextmanager
+def suppressed_cache_errors():
+    # type: () -> Iterator[None]
+    """If we can't access the cache then we can just skip caching and process
+    requests as if caching wasn't enabled.
+    """
+    try:
+        yield
+    except (OSError, IOError):
+        pass
+
+
+class SafeFileCache(BaseCache):
+    """
+    A file based cache which is safe to use even when the target directory may
+    not be accessible or writable.
+    """
+
+    def __init__(self, directory):
+        # type: (str) -> None
+        assert directory is not None, "Cache directory must not be None."
+        super(SafeFileCache, self).__init__()
+        self.directory = directory
+
+    def _get_cache_path(self, name):
+        # type: (str) -> str
+        # From cachecontrol.caches.file_cache.FileCache._fn, brought into our
+        # class for backwards-compatibility and to avoid using a non-public
+        # method.
+        hashed = FileCache.encode(name)
+        parts = list(hashed[:5]) + [hashed]
+        return os.path.join(self.directory, *parts)
+
+    def get(self, key):
+        # type: (str) -> Optional[bytes]
+        path = self._get_cache_path(key)
+        with suppressed_cache_errors():
+            with open(path, 'rb') as f:
+                return f.read()
+
+    def set(self, key, value):
+        # type: (str, bytes) -> None
+        path = self._get_cache_path(key)
+        with suppressed_cache_errors():
+            ensure_dir(os.path.dirname(path))
+
+            with adjacent_tmp_file(path) as f:
+                f.write(value)
+
+            replace(f.name, path)
+
+    def delete(self, key):
+        # type: (str) -> None
+        path = self._get_cache_path(key)
+        with suppressed_cache_errors():
+            os.remove(path)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/download.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/download.py
new file mode 100644
index 0000000..44f9985
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/download.py
@@ -0,0 +1,182 @@
+"""Download files with progress indicators.
+"""
+import cgi
+import logging
+import mimetypes
+import os
+
+from pip._vendor.requests.models import CONTENT_CHUNK_SIZE
+
+from pip._internal.cli.progress_bars import DownloadProgressProvider
+from pip._internal.exceptions import NetworkConnectionError
+from pip._internal.models.index import PyPI
+from pip._internal.network.cache import is_from_cache
+from pip._internal.network.utils import (
+    HEADERS,
+    raise_for_status,
+    response_chunks,
+)
+from pip._internal.utils.misc import (
+    format_size,
+    redact_auth_from_url,
+    splitext,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Iterable, Optional
+
+    from pip._vendor.requests.models import Response
+
+    from pip._internal.models.link import Link
+    from pip._internal.network.session import PipSession
+
+logger = logging.getLogger(__name__)
+
+
+def _get_http_response_size(resp):
+    # type: (Response) -> Optional[int]
+    try:
+        return int(resp.headers['content-length'])
+    except (ValueError, KeyError, TypeError):
+        return None
+
+
+def _prepare_download(
+    resp,  # type: Response
+    link,  # type: Link
+    progress_bar  # type: str
+):
+    # type: (...) -> Iterable[bytes]
+    total_length = _get_http_response_size(resp)
+
+    if link.netloc == PyPI.file_storage_domain:
+        url = link.show_url
+    else:
+        url = link.url_without_fragment
+
+    logged_url = redact_auth_from_url(url)
+
+    if total_length:
+        logged_url = '{} ({})'.format(logged_url, format_size(total_length))
+
+    if is_from_cache(resp):
+        logger.info("Using cached %s", logged_url)
+    else:
+        logger.info("Downloading %s", logged_url)
+
+    if logger.getEffectiveLevel() > logging.INFO:
+        show_progress = False
+    elif is_from_cache(resp):
+        show_progress = False
+    elif not total_length:
+        show_progress = True
+    elif total_length > (40 * 1000):
+        show_progress = True
+    else:
+        show_progress = False
+
+    chunks = response_chunks(resp, CONTENT_CHUNK_SIZE)
+
+    if not show_progress:
+        return chunks
+
+    return DownloadProgressProvider(
+        progress_bar, max=total_length
+    )(chunks)
+
+
+def sanitize_content_filename(filename):
+    # type: (str) -> str
+    """
+    Sanitize the "filename" value from a Content-Disposition header.
+    """
+    return os.path.basename(filename)
+
+
+def parse_content_disposition(content_disposition, default_filename):
+    # type: (str, str) -> str
+    """
+    Parse the "filename" value from a Content-Disposition header, and
+    return the default filename if the result is empty.
+    """
+    _type, params = cgi.parse_header(content_disposition)
+    filename = params.get('filename')
+    if filename:
+        # We need to sanitize the filename to prevent directory traversal
+        # in case the filename contains ".." path parts.
+        filename = sanitize_content_filename(filename)
+    return filename or default_filename
+
+
+def _get_http_response_filename(resp, link):
+    # type: (Response, Link) -> str
+    """Get an ideal filename from the given HTTP response, falling back to
+    the link filename if not provided.
+    """
+    filename = link.filename  # fallback
+    # Have a look at the Content-Disposition header for a better guess
+    content_disposition = resp.headers.get('content-disposition')
+    if content_disposition:
+        filename = parse_content_disposition(content_disposition, filename)
+    ext = splitext(filename)[1]  # type: Optional[str]
+    if not ext:
+        ext = mimetypes.guess_extension(
+            resp.headers.get('content-type', '')
+        )
+        if ext:
+            filename += ext
+    if not ext and link.url != resp.url:
+        ext = os.path.splitext(resp.url)[1]
+        if ext:
+            filename += ext
+    return filename
+
+
+def _http_get_download(session, link):
+    # type: (PipSession, Link) -> Response
+    target_url = link.url.split('#', 1)[0]
+    resp = session.get(target_url, headers=HEADERS, stream=True)
+    raise_for_status(resp)
+    return resp
+
+
+class Download(object):
+    def __init__(
+        self,
+        response,  # type: Response
+        filename,  # type: str
+        chunks,  # type: Iterable[bytes]
+    ):
+        # type: (...) -> None
+        self.response = response
+        self.filename = filename
+        self.chunks = chunks
+
+
+class Downloader(object):
+    def __init__(
+        self,
+        session,  # type: PipSession
+        progress_bar,  # type: str
+    ):
+        # type: (...) -> None
+        self._session = session
+        self._progress_bar = progress_bar
+
+    def __call__(self, link):
+        # type: (Link) -> Download
+        try:
+            resp = _http_get_download(self._session, link)
+        except NetworkConnectionError as e:
+            assert e.response is not None
+            logger.critical(
+                "HTTP error %s while getting %s", e.response.status_code, link
+            )
+            raise
+
+        return Download(
+            resp,
+            _get_http_response_filename(resp, link),
+            _prepare_download(resp, link, self._progress_bar),
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/lazy_wheel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/lazy_wheel.py
new file mode 100644
index 0000000..a0f9e15
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/lazy_wheel.py
@@ -0,0 +1,235 @@
+"""Lazy ZIP over HTTP"""
+
+__all__ = ['HTTPRangeRequestUnsupported', 'dist_from_wheel_url']
+
+from bisect import bisect_left, bisect_right
+from contextlib import contextmanager
+from tempfile import NamedTemporaryFile
+from zipfile import BadZipfile, ZipFile
+
+from pip._vendor.requests.models import CONTENT_CHUNK_SIZE
+from pip._vendor.six.moves import range
+
+from pip._internal.network.utils import (
+    HEADERS,
+    raise_for_status,
+    response_chunks,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.wheel import pkg_resources_distribution_for_wheel
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Dict, Iterator, List, Optional, Tuple
+
+    from pip._vendor.pkg_resources import Distribution
+    from pip._vendor.requests.models import Response
+
+    from pip._internal.network.session import PipSession
+
+
+class HTTPRangeRequestUnsupported(Exception):
+    pass
+
+
+def dist_from_wheel_url(name, url, session):
+    # type: (str, str, PipSession) -> Distribution
+    """Return a pkg_resources.Distribution from the given wheel URL.
+
+    This uses HTTP range requests to only fetch the potion of the wheel
+    containing metadata, just enough for the object to be constructed.
+    If such requests are not supported, HTTPRangeRequestUnsupported
+    is raised.
+    """
+    with LazyZipOverHTTP(url, session) as wheel:
+        # For read-only ZIP files, ZipFile only needs methods read,
+        # seek, seekable and tell, not the whole IO protocol.
+        zip_file = ZipFile(wheel)  # type: ignore
+        # After context manager exit, wheel.name
+        # is an invalid file by intention.
+        return pkg_resources_distribution_for_wheel(zip_file, name, wheel.name)
+
+
+class LazyZipOverHTTP(object):
+    """File-like object mapped to a ZIP file over HTTP.
+
+    This uses HTTP range requests to lazily fetch the file's content,
+    which is supposed to be fed to ZipFile.  If such requests are not
+    supported by the server, raise HTTPRangeRequestUnsupported
+    during initialization.
+    """
+
+    def __init__(self, url, session, chunk_size=CONTENT_CHUNK_SIZE):
+        # type: (str, PipSession, int) -> None
+        head = session.head(url, headers=HEADERS)
+        raise_for_status(head)
+        assert head.status_code == 200
+        self._session, self._url, self._chunk_size = session, url, chunk_size
+        self._length = int(head.headers['Content-Length'])
+        self._file = NamedTemporaryFile()
+        self.truncate(self._length)
+        self._left = []  # type: List[int]
+        self._right = []  # type: List[int]
+        if 'bytes' not in head.headers.get('Accept-Ranges', 'none'):
+            raise HTTPRangeRequestUnsupported('range request is not supported')
+        self._check_zip()
+
+    @property
+    def mode(self):
+        # type: () -> str
+        """Opening mode, which is always rb."""
+        return 'rb'
+
+    @property
+    def name(self):
+        # type: () -> str
+        """Path to the underlying file."""
+        return self._file.name
+
+    def seekable(self):
+        # type: () -> bool
+        """Return whether random access is supported, which is True."""
+        return True
+
+    def close(self):
+        # type: () -> None
+        """Close the file."""
+        self._file.close()
+
+    @property
+    def closed(self):
+        # type: () -> bool
+        """Whether the file is closed."""
+        return self._file.closed
+
+    def read(self, size=-1):
+        # type: (int) -> bytes
+        """Read up to size bytes from the object and return them.
+
+        As a convenience, if size is unspecified or -1,
+        all bytes until EOF are returned.  Fewer than
+        size bytes may be returned if EOF is reached.
+        """
+        download_size = max(size, self._chunk_size)
+        start, length = self.tell(), self._length
+        stop = length if size < 0 else min(start+download_size, length)
+        start = max(0, stop-download_size)
+        self._download(start, stop-1)
+        return self._file.read(size)
+
+    def readable(self):
+        # type: () -> bool
+        """Return whether the file is readable, which is True."""
+        return True
+
+    def seek(self, offset, whence=0):
+        # type: (int, int) -> int
+        """Change stream position and return the new absolute position.
+
+        Seek to offset relative position indicated by whence:
+        * 0: Start of stream (the default).  pos should be >= 0;
+        * 1: Current position - pos may be negative;
+        * 2: End of stream - pos usually negative.
+        """
+        return self._file.seek(offset, whence)
+
+    def tell(self):
+        # type: () -> int
+        """Return the current possition."""
+        return self._file.tell()
+
+    def truncate(self, size=None):
+        # type: (Optional[int]) -> int
+        """Resize the stream to the given size in bytes.
+
+        If size is unspecified resize to the current position.
+        The current stream position isn't changed.
+
+        Return the new file size.
+        """
+        return self._file.truncate(size)
+
+    def writable(self):
+        # type: () -> bool
+        """Return False."""
+        return False
+
+    def __enter__(self):
+        # type: () -> LazyZipOverHTTP
+        self._file.__enter__()
+        return self
+
+    def __exit__(self, *exc):
+        # type: (*Any) -> Optional[bool]
+        return self._file.__exit__(*exc)
+
+    @contextmanager
+    def _stay(self):
+        # type: ()-> Iterator[None]
+        """Return a context manager keeping the position.
+
+        At the end of the block, seek back to original position.
+        """
+        pos = self.tell()
+        try:
+            yield
+        finally:
+            self.seek(pos)
+
+    def _check_zip(self):
+        # type: () -> None
+        """Check and download until the file is a valid ZIP."""
+        end = self._length - 1
+        for start in reversed(range(0, end, self._chunk_size)):
+            self._download(start, end)
+            with self._stay():
+                try:
+                    # For read-only ZIP files, ZipFile only needs
+                    # methods read, seek, seekable and tell.
+                    ZipFile(self)  # type: ignore
+                except BadZipfile:
+                    pass
+                else:
+                    break
+
+    def _stream_response(self, start, end, base_headers=HEADERS):
+        # type: (int, int, Dict[str, str]) -> Response
+        """Return HTTP response to a range request from start to end."""
+        headers = base_headers.copy()
+        headers['Range'] = 'bytes={}-{}'.format(start, end)
+        # TODO: Get range requests to be correctly cached
+        headers['Cache-Control'] = 'no-cache'
+        return self._session.get(self._url, headers=headers, stream=True)
+
+    def _merge(self, start, end, left, right):
+        # type: (int, int, int, int) -> Iterator[Tuple[int, int]]
+        """Return an iterator of intervals to be fetched.
+
+        Args:
+            start (int): Start of needed interval
+            end (int): End of needed interval
+            left (int): Index of first overlapping downloaded data
+            right (int): Index after last overlapping downloaded data
+        """
+        lslice, rslice = self._left[left:right], self._right[left:right]
+        i = start = min([start]+lslice[:1])
+        end = max([end]+rslice[-1:])
+        for j, k in zip(lslice, rslice):
+            if j > i:
+                yield i, j-1
+            i = k + 1
+        if i <= end:
+            yield i, end
+        self._left[left:right], self._right[left:right] = [start], [end]
+
+    def _download(self, start, end):
+        # type: (int, int) -> None
+        """Download bytes from start to end inclusively."""
+        with self._stay():
+            left = bisect_left(self._right, start)
+            right = bisect_right(self._left, end)
+            for start, end in self._merge(start, end, left, right):
+                response = self._stream_response(start, end)
+                response.raise_for_status()
+                self.seek(start)
+                for chunk in response_chunks(response, self._chunk_size):
+                    self._file.write(chunk)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/session.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/session.py
new file mode 100644
index 0000000..39a4a54
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/session.py
@@ -0,0 +1,421 @@
+"""PipSession and supporting code, containing all pip-specific
+network request configuration and behavior.
+"""
+
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+import email.utils
+import json
+import logging
+import mimetypes
+import os
+import platform
+import sys
+import warnings
+
+from pip._vendor import requests, six, urllib3
+from pip._vendor.cachecontrol import CacheControlAdapter
+from pip._vendor.requests.adapters import BaseAdapter, HTTPAdapter
+from pip._vendor.requests.models import Response
+from pip._vendor.requests.structures import CaseInsensitiveDict
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+from pip._vendor.urllib3.exceptions import InsecureRequestWarning
+
+from pip import __version__
+from pip._internal.network.auth import MultiDomainBasicAuth
+from pip._internal.network.cache import SafeFileCache
+# Import ssl from compat so the initial import occurs in only one place.
+from pip._internal.utils.compat import has_tls, ipaddress
+from pip._internal.utils.glibc import libc_ver
+from pip._internal.utils.misc import (
+    build_url_from_netloc,
+    get_installed_version,
+    parse_netloc,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.urls import url_to_path
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Iterator, List, Optional, Tuple, Union,
+    )
+
+    from pip._internal.models.link import Link
+
+    SecureOrigin = Tuple[str, str, Optional[Union[int, str]]]
+
+
+logger = logging.getLogger(__name__)
+
+
+# Ignore warning raised when using --trusted-host.
+warnings.filterwarnings("ignore", category=InsecureRequestWarning)
+
+
+SECURE_ORIGINS = [
+    # protocol, hostname, port
+    # Taken from Chrome's list of secure origins (See: http://bit.ly/1qrySKC)
+    ("https", "*", "*"),
+    ("*", "localhost", "*"),
+    ("*", "127.0.0.0/8", "*"),
+    ("*", "::1/128", "*"),
+    ("file", "*", None),
+    # ssh is always secure.
+    ("ssh", "*", "*"),
+]  # type: List[SecureOrigin]
+
+
+# These are environment variables present when running under various
+# CI systems.  For each variable, some CI systems that use the variable
+# are indicated.  The collection was chosen so that for each of a number
+# of popular systems, at least one of the environment variables is used.
+# This list is used to provide some indication of and lower bound for
+# CI traffic to PyPI.  Thus, it is okay if the list is not comprehensive.
+# For more background, see: https://github.com/pypa/pip/issues/5499
+CI_ENVIRONMENT_VARIABLES = (
+    # Azure Pipelines
+    'BUILD_BUILDID',
+    # Jenkins
+    'BUILD_ID',
+    # AppVeyor, CircleCI, Codeship, Gitlab CI, Shippable, Travis CI
+    'CI',
+    # Explicit environment variable.
+    'PIP_IS_CI',
+)
+
+
+def looks_like_ci():
+    # type: () -> bool
+    """
+    Return whether it looks like pip is running under CI.
+    """
+    # We don't use the method of checking for a tty (e.g. using isatty())
+    # because some CI systems mimic a tty (e.g. Travis CI).  Thus that
+    # method doesn't provide definitive information in either direction.
+    return any(name in os.environ for name in CI_ENVIRONMENT_VARIABLES)
+
+
+def user_agent():
+    """
+    Return a string representing the user agent.
+    """
+    data = {
+        "installer": {"name": "pip", "version": __version__},
+        "python": platform.python_version(),
+        "implementation": {
+            "name": platform.python_implementation(),
+        },
+    }
+
+    if data["implementation"]["name"] == 'CPython':
+        data["implementation"]["version"] = platform.python_version()
+    elif data["implementation"]["name"] == 'PyPy':
+        if sys.pypy_version_info.releaselevel == 'final':
+            pypy_version_info = sys.pypy_version_info[:3]
+        else:
+            pypy_version_info = sys.pypy_version_info
+        data["implementation"]["version"] = ".".join(
+            [str(x) for x in pypy_version_info]
+        )
+    elif data["implementation"]["name"] == 'Jython':
+        # Complete Guess
+        data["implementation"]["version"] = platform.python_version()
+    elif data["implementation"]["name"] == 'IronPython':
+        # Complete Guess
+        data["implementation"]["version"] = platform.python_version()
+
+    if sys.platform.startswith("linux"):
+        from pip._vendor import distro
+        distro_infos = dict(filter(
+            lambda x: x[1],
+            zip(["name", "version", "id"], distro.linux_distribution()),
+        ))
+        libc = dict(filter(
+            lambda x: x[1],
+            zip(["lib", "version"], libc_ver()),
+        ))
+        if libc:
+            distro_infos["libc"] = libc
+        if distro_infos:
+            data["distro"] = distro_infos
+
+    if sys.platform.startswith("darwin") and platform.mac_ver()[0]:
+        data["distro"] = {"name": "macOS", "version": platform.mac_ver()[0]}
+
+    if platform.system():
+        data.setdefault("system", {})["name"] = platform.system()
+
+    if platform.release():
+        data.setdefault("system", {})["release"] = platform.release()
+
+    if platform.machine():
+        data["cpu"] = platform.machine()
+
+    if has_tls():
+        import _ssl as ssl
+        data["openssl_version"] = ssl.OPENSSL_VERSION
+
+    setuptools_version = get_installed_version("setuptools")
+    if setuptools_version is not None:
+        data["setuptools_version"] = setuptools_version
+
+    # Use None rather than False so as not to give the impression that
+    # pip knows it is not being run under CI.  Rather, it is a null or
+    # inconclusive result.  Also, we include some value rather than no
+    # value to make it easier to know that the check has been run.
+    data["ci"] = True if looks_like_ci() else None
+
+    user_data = os.environ.get("PIP_USER_AGENT_USER_DATA")
+    if user_data is not None:
+        data["user_data"] = user_data
+
+    return "{data[installer][name]}/{data[installer][version]} {json}".format(
+        data=data,
+        json=json.dumps(data, separators=(",", ":"), sort_keys=True),
+    )
+
+
+class LocalFSAdapter(BaseAdapter):
+
+    def send(self, request, stream=None, timeout=None, verify=None, cert=None,
+             proxies=None):
+        pathname = url_to_path(request.url)
+
+        resp = Response()
+        resp.status_code = 200
+        resp.url = request.url
+
+        try:
+            stats = os.stat(pathname)
+        except OSError as exc:
+            resp.status_code = 404
+            resp.raw = exc
+        else:
+            modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
+            content_type = mimetypes.guess_type(pathname)[0] or "text/plain"
+            resp.headers = CaseInsensitiveDict({
+                "Content-Type": content_type,
+                "Content-Length": stats.st_size,
+                "Last-Modified": modified,
+            })
+
+            resp.raw = open(pathname, "rb")
+            resp.close = resp.raw.close
+
+        return resp
+
+    def close(self):
+        pass
+
+
+class InsecureHTTPAdapter(HTTPAdapter):
+
+    def cert_verify(self, conn, url, verify, cert):
+        super(InsecureHTTPAdapter, self).cert_verify(
+            conn=conn, url=url, verify=False, cert=cert
+        )
+
+
+class InsecureCacheControlAdapter(CacheControlAdapter):
+
+    def cert_verify(self, conn, url, verify, cert):
+        super(InsecureCacheControlAdapter, self).cert_verify(
+            conn=conn, url=url, verify=False, cert=cert
+        )
+
+
+class PipSession(requests.Session):
+
+    timeout = None  # type: Optional[int]
+
+    def __init__(self, *args, **kwargs):
+        """
+        :param trusted_hosts: Domains not to emit warnings for when not using
+            HTTPS.
+        """
+        retries = kwargs.pop("retries", 0)
+        cache = kwargs.pop("cache", None)
+        trusted_hosts = kwargs.pop("trusted_hosts", [])  # type: List[str]
+        index_urls = kwargs.pop("index_urls", None)
+
+        super(PipSession, self).__init__(*args, **kwargs)
+
+        # Namespace the attribute with "pip_" just in case to prevent
+        # possible conflicts with the base class.
+        self.pip_trusted_origins = []  # type: List[Tuple[str, Optional[int]]]
+
+        # Attach our User Agent to the request
+        self.headers["User-Agent"] = user_agent()
+
+        # Attach our Authentication handler to the session
+        self.auth = MultiDomainBasicAuth(index_urls=index_urls)
+
+        # Create our urllib3.Retry instance which will allow us to customize
+        # how we handle retries.
+        retries = urllib3.Retry(
+            # Set the total number of retries that a particular request can
+            # have.
+            total=retries,
+
+            # A 503 error from PyPI typically means that the Fastly -> Origin
+            # connection got interrupted in some way. A 503 error in general
+            # is typically considered a transient error so we'll go ahead and
+            # retry it.
+            # A 500 may indicate transient error in Amazon S3
+            # A 520 or 527 - may indicate transient error in CloudFlare
+            status_forcelist=[500, 503, 520, 527],
+
+            # Add a small amount of back off between failed requests in
+            # order to prevent hammering the service.
+            backoff_factor=0.25,
+        )
+
+        # Our Insecure HTTPAdapter disables HTTPS validation. It does not
+        # support caching so we'll use it for all http:// URLs.
+        # If caching is disabled, we will also use it for
+        # https:// hosts that we've marked as ignoring
+        # TLS errors for (trusted-hosts).
+        insecure_adapter = InsecureHTTPAdapter(max_retries=retries)
+
+        # We want to _only_ cache responses on securely fetched origins or when
+        # the host is specified as trusted. We do this because
+        # we can't validate the response of an insecurely/untrusted fetched
+        # origin, and we don't want someone to be able to poison the cache and
+        # require manual eviction from the cache to fix it.
+        if cache:
+            secure_adapter = CacheControlAdapter(
+                cache=SafeFileCache(cache),
+                max_retries=retries,
+            )
+            self._trusted_host_adapter = InsecureCacheControlAdapter(
+                cache=SafeFileCache(cache),
+                max_retries=retries,
+            )
+        else:
+            secure_adapter = HTTPAdapter(max_retries=retries)
+            self._trusted_host_adapter = insecure_adapter
+
+        self.mount("https://", secure_adapter)
+        self.mount("http://", insecure_adapter)
+
+        # Enable file:// urls
+        self.mount("file://", LocalFSAdapter())
+
+        for host in trusted_hosts:
+            self.add_trusted_host(host, suppress_logging=True)
+
+    def add_trusted_host(self, host, source=None, suppress_logging=False):
+        # type: (str, Optional[str], bool) -> None
+        """
+        :param host: It is okay to provide a host that has previously been
+            added.
+        :param source: An optional source string, for logging where the host
+            string came from.
+        """
+        if not suppress_logging:
+            msg = 'adding trusted host: {!r}'.format(host)
+            if source is not None:
+                msg += ' (from {})'.format(source)
+            logger.info(msg)
+
+        host_port = parse_netloc(host)
+        if host_port not in self.pip_trusted_origins:
+            self.pip_trusted_origins.append(host_port)
+
+        self.mount(
+            build_url_from_netloc(host) + '/',
+            self._trusted_host_adapter
+        )
+        if not host_port[1]:
+            # Mount wildcard ports for the same host.
+            self.mount(
+                build_url_from_netloc(host) + ':',
+                self._trusted_host_adapter
+            )
+
+    def iter_secure_origins(self):
+        # type: () -> Iterator[SecureOrigin]
+        for secure_origin in SECURE_ORIGINS:
+            yield secure_origin
+        for host, port in self.pip_trusted_origins:
+            yield ('*', host, '*' if port is None else port)
+
+    def is_secure_origin(self, location):
+        # type: (Link) -> bool
+        # Determine if this url used a secure transport mechanism
+        parsed = urllib_parse.urlparse(str(location))
+        origin_protocol, origin_host, origin_port = (
+            parsed.scheme, parsed.hostname, parsed.port,
+        )
+
+        # The protocol to use to see if the protocol matches.
+        # Don't count the repository type as part of the protocol: in
+        # cases such as "git+ssh", only use "ssh". (I.e., Only verify against
+        # the last scheme.)
+        origin_protocol = origin_protocol.rsplit('+', 1)[-1]
+
+        # Determine if our origin is a secure origin by looking through our
+        # hardcoded list of secure origins, as well as any additional ones
+        # configured on this PackageFinder instance.
+        for secure_origin in self.iter_secure_origins():
+            secure_protocol, secure_host, secure_port = secure_origin
+            if origin_protocol != secure_protocol and secure_protocol != "*":
+                continue
+
+            try:
+                addr = ipaddress.ip_address(
+                    None
+                    if origin_host is None
+                    else six.ensure_text(origin_host)
+                )
+                network = ipaddress.ip_network(
+                    six.ensure_text(secure_host)
+                )
+            except ValueError:
+                # We don't have both a valid address or a valid network, so
+                # we'll check this origin against hostnames.
+                if (
+                    origin_host and
+                    origin_host.lower() != secure_host.lower() and
+                    secure_host != "*"
+                ):
+                    continue
+            else:
+                # We have a valid address and network, so see if the address
+                # is contained within the network.
+                if addr not in network:
+                    continue
+
+            # Check to see if the port matches.
+            if (
+                origin_port != secure_port and
+                secure_port != "*" and
+                secure_port is not None
+            ):
+                continue
+
+            # If we've gotten here, then this origin matches the current
+            # secure origin and we should return True
+            return True
+
+        # If we've gotten to this point, then the origin isn't secure and we
+        # will not accept it as a valid location to search. We will however
+        # log a warning that we are ignoring it.
+        logger.warning(
+            "The repository located at %s is not a trusted or secure host and "
+            "is being ignored. If this repository is available via HTTPS we "
+            "recommend you use HTTPS instead, otherwise you may silence "
+            "this warning and allow it anyway with '--trusted-host %s'.",
+            origin_host,
+            origin_host,
+        )
+
+        return False
+
+    def request(self, method, url, *args, **kwargs):
+        # Allow setting a default timeout on a session
+        kwargs.setdefault("timeout", self.timeout)
+
+        # Dispatch the actual request
+        return super(PipSession, self).request(method, url, *args, **kwargs)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/utils.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/utils.py
new file mode 100644
index 0000000..907b3fe
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/utils.py
@@ -0,0 +1,97 @@
+from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
+
+from pip._internal.exceptions import NetworkConnectionError
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Dict, Iterator
+
+# The following comments and HTTP headers were originally added by
+# Donald Stufft in git commit 22c562429a61bb77172039e480873fb239dd8c03.
+#
+# We use Accept-Encoding: identity here because requests defaults to
+# accepting compressed responses. This breaks in a variety of ways
+# depending on how the server is configured.
+# - Some servers will notice that the file isn't a compressible file
+#   and will leave the file alone and with an empty Content-Encoding
+# - Some servers will notice that the file is already compressed and
+#   will leave the file alone, adding a Content-Encoding: gzip header
+# - Some servers won't notice anything at all and will take a file
+#   that's already been compressed and compress it again, and set
+#   the Content-Encoding: gzip header
+# By setting this to request only the identity encoding we're hoping
+# to eliminate the third case.  Hopefully there does not exist a server
+# which when given a file will notice it is already compressed and that
+# you're not asking for a compressed file and will then decompress it
+# before sending because if that's the case I don't think it'll ever be
+# possible to make this work.
+HEADERS = {'Accept-Encoding': 'identity'}  # type: Dict[str, str]
+
+
+def raise_for_status(resp):
+    # type: (Response) -> None
+    http_error_msg = u''
+    if isinstance(resp.reason, bytes):
+        # We attempt to decode utf-8 first because some servers
+        # choose to localize their reason strings. If the string
+        # isn't utf-8, we fall back to iso-8859-1 for all other
+        # encodings.
+        try:
+            reason = resp.reason.decode('utf-8')
+        except UnicodeDecodeError:
+            reason = resp.reason.decode('iso-8859-1')
+    else:
+        reason = resp.reason
+
+    if 400 <= resp.status_code < 500:
+        http_error_msg = u'%s Client Error: %s for url: %s' % (
+            resp.status_code, reason, resp.url)
+
+    elif 500 <= resp.status_code < 600:
+        http_error_msg = u'%s Server Error: %s for url: %s' % (
+            resp.status_code, reason, resp.url)
+
+    if http_error_msg:
+        raise NetworkConnectionError(http_error_msg, response=resp)
+
+
+def response_chunks(response, chunk_size=CONTENT_CHUNK_SIZE):
+    # type: (Response, int) -> Iterator[bytes]
+    """Given a requests Response, provide the data chunks.
+    """
+    try:
+        # Special case for urllib3.
+        for chunk in response.raw.stream(
+            chunk_size,
+            # We use decode_content=False here because we don't
+            # want urllib3 to mess with the raw bytes we get
+            # from the server. If we decompress inside of
+            # urllib3 then we cannot verify the checksum
+            # because the checksum will be of the compressed
+            # file. This breakage will only occur if the
+            # server adds a Content-Encoding header, which
+            # depends on how the server was configured:
+            # - Some servers will notice that the file isn't a
+            #   compressible file and will leave the file alone
+            #   and with an empty Content-Encoding
+            # - Some servers will notice that the file is
+            #   already compressed and will leave the file
+            #   alone and will add a Content-Encoding: gzip
+            #   header
+            # - Some servers won't notice anything at all and
+            #   will take a file that's already been compressed
+            #   and compress it again and set the
+            #   Content-Encoding: gzip header
+            #
+            # By setting this not to decode automatically we
+            # hope to eliminate problems with the second case.
+            decode_content=False,
+        ):
+            yield chunk
+    except AttributeError:
+        # Standard file-like object.
+        while True:
+            chunk = response.raw.read(chunk_size)
+            if not chunk:
+                break
+            yield chunk
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/xmlrpc.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/xmlrpc.py
new file mode 100644
index 0000000..e611262
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/network/xmlrpc.py
@@ -0,0 +1,52 @@
+"""xmlrpclib.Transport implementation
+"""
+
+import logging
+
+# NOTE: XMLRPC Client is not annotated in typeshed as on 2017-07-17, which is
+#       why we ignore the type on this import
+from pip._vendor.six.moves import xmlrpc_client  # type: ignore
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.exceptions import NetworkConnectionError
+from pip._internal.network.utils import raise_for_status
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Dict
+    from pip._internal.network.session import PipSession
+
+
+logger = logging.getLogger(__name__)
+
+
+class PipXmlrpcTransport(xmlrpc_client.Transport):
+    """Provide a `xmlrpclib.Transport` implementation via a `PipSession`
+    object.
+    """
+
+    def __init__(self, index_url, session, use_datetime=False):
+        # type: (str, PipSession, bool) -> None
+        xmlrpc_client.Transport.__init__(self, use_datetime)
+        index_parts = urllib_parse.urlparse(index_url)
+        self._scheme = index_parts.scheme
+        self._session = session
+
+    def request(self, host, handler, request_body, verbose=False):
+        # type: (str, str, Dict[str, str], bool) -> None
+        parts = (self._scheme, host, handler, None, None, None)
+        url = urllib_parse.urlunparse(parts)
+        try:
+            headers = {'Content-Type': 'text/xml'}
+            response = self._session.post(url, data=request_body,
+                                          headers=headers, stream=True)
+            raise_for_status(response)
+            self.verbose = verbose
+            return self.parse_response(response.raw)
+        except NetworkConnectionError as exc:
+            assert exc.response
+            logger.critical(
+                "HTTP error %s while getting %s",
+                exc.response.status_code, url,
+            )
+            raise
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/metadata.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/metadata.py
new file mode 100644
index 0000000..cf52f8d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/metadata.py
@@ -0,0 +1,37 @@
+"""Metadata generation logic for source distributions.
+"""
+
+import os
+
+from pip._internal.utils.subprocess import runner_with_spinner_message
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from pip._internal.build_env import BuildEnvironment
+    from pip._vendor.pep517.wrappers import Pep517HookCaller
+
+
+def generate_metadata(build_env, backend):
+    # type: (BuildEnvironment, Pep517HookCaller) -> str
+    """Generate metadata using mechanisms described in PEP 517.
+
+    Returns the generated metadata directory.
+    """
+    metadata_tmpdir = TempDirectory(
+        kind="modern-metadata", globally_managed=True
+    )
+
+    metadata_dir = metadata_tmpdir.path
+
+    with build_env:
+        # Note that Pep517HookCaller implements a fallback for
+        # prepare_metadata_for_build_wheel, so we don't have to
+        # consider the possibility that this hook doesn't exist.
+        runner = runner_with_spinner_message("Preparing wheel metadata")
+        with backend.subprocess_runner(runner):
+            distinfo_dir = backend.prepare_metadata_for_build_wheel(
+                metadata_dir
+            )
+
+    return os.path.join(metadata_dir, distinfo_dir)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/metadata_legacy.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/metadata_legacy.py
new file mode 100644
index 0000000..14762ae
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/metadata_legacy.py
@@ -0,0 +1,77 @@
+"""Metadata generation logic for legacy source distributions.
+"""
+
+import logging
+import os
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.utils.setuptools_build import make_setuptools_egg_info_args
+from pip._internal.utils.subprocess import call_subprocess
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from pip._internal.build_env import BuildEnvironment
+
+logger = logging.getLogger(__name__)
+
+
+def _find_egg_info(directory):
+    # type: (str) -> str
+    """Find an .egg-info subdirectory in `directory`.
+    """
+    filenames = [
+        f for f in os.listdir(directory) if f.endswith(".egg-info")
+    ]
+
+    if not filenames:
+        raise InstallationError(
+            "No .egg-info directory found in {}".format(directory)
+        )
+
+    if len(filenames) > 1:
+        raise InstallationError(
+            "More than one .egg-info directory found in {}".format(
+                directory
+            )
+        )
+
+    return os.path.join(directory, filenames[0])
+
+
+def generate_metadata(
+    build_env,  # type: BuildEnvironment
+    setup_py_path,  # type: str
+    source_dir,  # type: str
+    isolated,  # type: bool
+    details,  # type: str
+):
+    # type: (...) -> str
+    """Generate metadata using setup.py-based defacto mechanisms.
+
+    Returns the generated metadata directory.
+    """
+    logger.debug(
+        'Running setup.py (path:%s) egg_info for package %s',
+        setup_py_path, details,
+    )
+
+    egg_info_dir = TempDirectory(
+        kind="pip-egg-info", globally_managed=True
+    ).path
+
+    args = make_setuptools_egg_info_args(
+        setup_py_path,
+        egg_info_dir=egg_info_dir,
+        no_user_config=isolated,
+    )
+
+    with build_env:
+        call_subprocess(
+            args,
+            cwd=source_dir,
+            command_desc='python setup.py egg_info',
+        )
+
+    # Return the .egg-info directory.
+    return _find_egg_info(egg_info_dir)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/wheel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/wheel.py
new file mode 100644
index 0000000..0c28c49
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/wheel.py
@@ -0,0 +1,46 @@
+import logging
+import os
+
+from pip._internal.utils.subprocess import runner_with_spinner_message
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional
+    from pip._vendor.pep517.wrappers import Pep517HookCaller
+
+logger = logging.getLogger(__name__)
+
+
+def build_wheel_pep517(
+    name,  # type: str
+    backend,  # type: Pep517HookCaller
+    metadata_directory,  # type: str
+    build_options,  # type: List[str]
+    tempd,  # type: str
+):
+    # type: (...) -> Optional[str]
+    """Build one InstallRequirement using the PEP 517 build process.
+
+    Returns path to wheel if successfully built. Otherwise, returns None.
+    """
+    assert metadata_directory is not None
+    if build_options:
+        # PEP 517 does not support --build-options
+        logger.error('Cannot build wheel for %s using PEP 517 when '
+                     '--build-option is present', name)
+        return None
+    try:
+        logger.debug('Destination directory: %s', tempd)
+
+        runner = runner_with_spinner_message(
+            'Building wheel for {} (PEP 517)'.format(name)
+        )
+        with backend.subprocess_runner(runner):
+            wheel_name = backend.build_wheel(
+                tempd,
+                metadata_directory=metadata_directory,
+            )
+    except Exception:
+        logger.error('Failed building wheel for %s', name)
+        return None
+    return os.path.join(tempd, wheel_name)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/wheel_legacy.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/wheel_legacy.py
new file mode 100644
index 0000000..37dc876
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/build/wheel_legacy.py
@@ -0,0 +1,115 @@
+import logging
+import os.path
+
+from pip._internal.cli.spinners import open_spinner
+from pip._internal.utils.setuptools_build import (
+    make_setuptools_bdist_wheel_args,
+)
+from pip._internal.utils.subprocess import (
+    LOG_DIVIDER,
+    call_subprocess,
+    format_command_args,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional, Text
+
+logger = logging.getLogger(__name__)
+
+
+def format_command_result(
+    command_args,  # type: List[str]
+    command_output,  # type: Text
+):
+    # type: (...) -> str
+    """Format command information for logging."""
+    command_desc = format_command_args(command_args)
+    text = 'Command arguments: {}\n'.format(command_desc)
+
+    if not command_output:
+        text += 'Command output: None'
+    elif logger.getEffectiveLevel() > logging.DEBUG:
+        text += 'Command output: [use --verbose to show]'
+    else:
+        if not command_output.endswith('\n'):
+            command_output += '\n'
+        text += 'Command output:\n{}{}'.format(command_output, LOG_DIVIDER)
+
+    return text
+
+
+def get_legacy_build_wheel_path(
+    names,  # type: List[str]
+    temp_dir,  # type: str
+    name,  # type: str
+    command_args,  # type: List[str]
+    command_output,  # type: Text
+):
+    # type: (...) -> Optional[str]
+    """Return the path to the wheel in the temporary build directory."""
+    # Sort for determinism.
+    names = sorted(names)
+    if not names:
+        msg = (
+            'Legacy build of wheel for {!r} created no files.\n'
+        ).format(name)
+        msg += format_command_result(command_args, command_output)
+        logger.warning(msg)
+        return None
+
+    if len(names) > 1:
+        msg = (
+            'Legacy build of wheel for {!r} created more than one file.\n'
+            'Filenames (choosing first): {}\n'
+        ).format(name, names)
+        msg += format_command_result(command_args, command_output)
+        logger.warning(msg)
+
+    return os.path.join(temp_dir, names[0])
+
+
+def build_wheel_legacy(
+    name,  # type: str
+    setup_py_path,  # type: str
+    source_dir,  # type: str
+    global_options,  # type: List[str]
+    build_options,  # type: List[str]
+    tempd,  # type: str
+):
+    # type: (...) -> Optional[str]
+    """Build one unpacked package using the "legacy" build process.
+
+    Returns path to wheel if successfully built. Otherwise, returns None.
+    """
+    wheel_args = make_setuptools_bdist_wheel_args(
+        setup_py_path,
+        global_options=global_options,
+        build_options=build_options,
+        destination_dir=tempd,
+    )
+
+    spin_message = 'Building wheel for {} (setup.py)'.format(name)
+    with open_spinner(spin_message) as spinner:
+        logger.debug('Destination directory: %s', tempd)
+
+        try:
+            output = call_subprocess(
+                wheel_args,
+                cwd=source_dir,
+                spinner=spinner,
+            )
+        except Exception:
+            spinner.finish("error")
+            logger.error('Failed building wheel for %s', name)
+            return None
+
+        names = os.listdir(tempd)
+        wheel_path = get_legacy_build_wheel_path(
+            names=names,
+            temp_dir=tempd,
+            name=name,
+            command_args=wheel_args,
+            command_output=output,
+        )
+        return wheel_path
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/check.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/check.py
new file mode 100644
index 0000000..0d59632
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/check.py
@@ -0,0 +1,158 @@
+"""Validation of dependencies of packages
+"""
+
+import logging
+from collections import namedtuple
+
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.pkg_resources import RequirementParseError
+
+from pip._internal.distributions import (
+    make_distribution_for_install_requirement,
+)
+from pip._internal.utils.misc import get_installed_distributions
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+logger = logging.getLogger(__name__)
+
+if MYPY_CHECK_RUNNING:
+    from pip._internal.req.req_install import InstallRequirement
+    from typing import (
+        Any, Callable, Dict, Optional, Set, Tuple, List
+    )
+
+    # Shorthands
+    PackageSet = Dict[str, 'PackageDetails']
+    Missing = Tuple[str, Any]
+    Conflicting = Tuple[str, str, Any]
+
+    MissingDict = Dict[str, List[Missing]]
+    ConflictingDict = Dict[str, List[Conflicting]]
+    CheckResult = Tuple[MissingDict, ConflictingDict]
+    ConflictDetails = Tuple[PackageSet, CheckResult]
+
+PackageDetails = namedtuple('PackageDetails', ['version', 'requires'])
+
+
+def create_package_set_from_installed(**kwargs):
+    # type: (**Any) -> Tuple[PackageSet, bool]
+    """Converts a list of distributions into a PackageSet.
+    """
+    # Default to using all packages installed on the system
+    if kwargs == {}:
+        kwargs = {"local_only": False, "skip": ()}
+
+    package_set = {}
+    problems = False
+    for dist in get_installed_distributions(**kwargs):
+        name = canonicalize_name(dist.project_name)
+        try:
+            package_set[name] = PackageDetails(dist.version, dist.requires())
+        except (OSError, RequirementParseError) as e:
+            # Don't crash on unreadable or broken metadata
+            logger.warning("Error parsing requirements for %s: %s", name, e)
+            problems = True
+    return package_set, problems
+
+
+def check_package_set(package_set, should_ignore=None):
+    # type: (PackageSet, Optional[Callable[[str], bool]]) -> CheckResult
+    """Check if a package set is consistent
+
+    If should_ignore is passed, it should be a callable that takes a
+    package name and returns a boolean.
+    """
+
+    missing = {}
+    conflicting = {}
+
+    for package_name in package_set:
+        # Info about dependencies of package_name
+        missing_deps = set()  # type: Set[Missing]
+        conflicting_deps = set()  # type: Set[Conflicting]
+
+        if should_ignore and should_ignore(package_name):
+            continue
+
+        for req in package_set[package_name].requires:
+            name = canonicalize_name(req.project_name)  # type: str
+
+            # Check if it's missing
+            if name not in package_set:
+                missed = True
+                if req.marker is not None:
+                    missed = req.marker.evaluate()
+                if missed:
+                    missing_deps.add((name, req))
+                continue
+
+            # Check if there's a conflict
+            version = package_set[name].version  # type: str
+            if not req.specifier.contains(version, prereleases=True):
+                conflicting_deps.add((name, version, req))
+
+        if missing_deps:
+            missing[package_name] = sorted(missing_deps, key=str)
+        if conflicting_deps:
+            conflicting[package_name] = sorted(conflicting_deps, key=str)
+
+    return missing, conflicting
+
+
+def check_install_conflicts(to_install):
+    # type: (List[InstallRequirement]) -> ConflictDetails
+    """For checking if the dependency graph would be consistent after \
+    installing given requirements
+    """
+    # Start from the current state
+    package_set, _ = create_package_set_from_installed()
+    # Install packages
+    would_be_installed = _simulate_installation_of(to_install, package_set)
+
+    # Only warn about directly-dependent packages; create a whitelist of them
+    whitelist = _create_whitelist(would_be_installed, package_set)
+
+    return (
+        package_set,
+        check_package_set(
+            package_set, should_ignore=lambda name: name not in whitelist
+        )
+    )
+
+
+def _simulate_installation_of(to_install, package_set):
+    # type: (List[InstallRequirement], PackageSet) -> Set[str]
+    """Computes the version of packages after installing to_install.
+    """
+
+    # Keep track of packages that were installed
+    installed = set()
+
+    # Modify it as installing requirement_set would (assuming no errors)
+    for inst_req in to_install:
+        abstract_dist = make_distribution_for_install_requirement(inst_req)
+        dist = abstract_dist.get_pkg_resources_distribution()
+
+        assert dist is not None
+        name = canonicalize_name(dist.key)
+        package_set[name] = PackageDetails(dist.version, dist.requires())
+
+        installed.add(name)
+
+    return installed
+
+
+def _create_whitelist(would_be_installed, package_set):
+    # type: (Set[str], PackageSet) -> Set[str]
+    packages_affected = set(would_be_installed)
+
+    for package_name in package_set:
+        if package_name in packages_affected:
+            continue
+
+        for req in package_set[package_name].requires:
+            if canonicalize_name(req.name) in packages_affected:
+                packages_affected.add(package_name)
+                break
+
+    return packages_affected
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/freeze.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/freeze.py
new file mode 100644
index 0000000..ddb9cb2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/freeze.py
@@ -0,0 +1,272 @@
+from __future__ import absolute_import
+
+import collections
+import logging
+import os
+
+from pip._vendor import six
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.pkg_resources import RequirementParseError
+
+from pip._internal.exceptions import BadCommand, InstallationError
+from pip._internal.req.constructors import (
+    install_req_from_editable,
+    install_req_from_line,
+)
+from pip._internal.req.req_file import COMMENT_RE
+from pip._internal.utils.direct_url_helpers import (
+    direct_url_as_pep440_direct_reference,
+    dist_get_direct_url,
+)
+from pip._internal.utils.misc import (
+    dist_is_editable,
+    get_installed_distributions,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Iterator, Optional, List, Container, Set, Dict, Tuple, Iterable, Union
+    )
+    from pip._internal.cache import WheelCache
+    from pip._vendor.pkg_resources import (
+        Distribution, Requirement
+    )
+
+    RequirementInfo = Tuple[Optional[Union[str, Requirement]], bool, List[str]]
+
+
+logger = logging.getLogger(__name__)
+
+
+def freeze(
+    requirement=None,  # type: Optional[List[str]]
+    find_links=None,  # type: Optional[List[str]]
+    local_only=False,  # type: bool
+    user_only=False,  # type: bool
+    paths=None,  # type: Optional[List[str]]
+    isolated=False,  # type: bool
+    wheel_cache=None,  # type: Optional[WheelCache]
+    exclude_editable=False,  # type: bool
+    skip=()  # type: Container[str]
+):
+    # type: (...) -> Iterator[str]
+    find_links = find_links or []
+
+    for link in find_links:
+        yield '-f {}'.format(link)
+    installations = {}  # type: Dict[str, FrozenRequirement]
+
+    for dist in get_installed_distributions(
+            local_only=local_only,
+            skip=(),
+            user_only=user_only,
+            paths=paths
+    ):
+        try:
+            req = FrozenRequirement.from_dist(dist)
+        except RequirementParseError as exc:
+            # We include dist rather than dist.project_name because the
+            # dist string includes more information, like the version and
+            # location. We also include the exception message to aid
+            # troubleshooting.
+            logger.warning(
+                'Could not generate requirement for distribution %r: %s',
+                dist, exc
+            )
+            continue
+        if exclude_editable and req.editable:
+            continue
+        installations[req.canonical_name] = req
+
+    if requirement:
+        # the options that don't get turned into an InstallRequirement
+        # should only be emitted once, even if the same option is in multiple
+        # requirements files, so we need to keep track of what has been emitted
+        # so that we don't emit it again if it's seen again
+        emitted_options = set()  # type: Set[str]
+        # keep track of which files a requirement is in so that we can
+        # give an accurate warning if a requirement appears multiple times.
+        req_files = collections.defaultdict(list)  # type: Dict[str, List[str]]
+        for req_file_path in requirement:
+            with open(req_file_path) as req_file:
+                for line in req_file:
+                    if (not line.strip() or
+                            line.strip().startswith('#') or
+                            line.startswith((
+                                '-r', '--requirement',
+                                '-f', '--find-links',
+                                '-i', '--index-url',
+                                '--pre',
+                                '--trusted-host',
+                                '--process-dependency-links',
+                                '--extra-index-url',
+                                '--use-feature'))):
+                        line = line.rstrip()
+                        if line not in emitted_options:
+                            emitted_options.add(line)
+                            yield line
+                        continue
+
+                    if line.startswith('-e') or line.startswith('--editable'):
+                        if line.startswith('-e'):
+                            line = line[2:].strip()
+                        else:
+                            line = line[len('--editable'):].strip().lstrip('=')
+                        line_req = install_req_from_editable(
+                            line,
+                            isolated=isolated,
+                        )
+                    else:
+                        line_req = install_req_from_line(
+                            COMMENT_RE.sub('', line).strip(),
+                            isolated=isolated,
+                        )
+
+                    if not line_req.name:
+                        logger.info(
+                            "Skipping line in requirement file [%s] because "
+                            "it's not clear what it would install: %s",
+                            req_file_path, line.strip(),
+                        )
+                        logger.info(
+                            "  (add #egg=PackageName to the URL to avoid"
+                            " this warning)"
+                        )
+                    else:
+                        line_req_canonical_name = canonicalize_name(
+                            line_req.name)
+                        if line_req_canonical_name not in installations:
+                            # either it's not installed, or it is installed
+                            # but has been processed already
+                            if not req_files[line_req.name]:
+                                logger.warning(
+                                    "Requirement file [%s] contains %s, but "
+                                    "package %r is not installed",
+                                    req_file_path,
+                                    COMMENT_RE.sub('', line).strip(),
+                                    line_req.name
+                                )
+                            else:
+                                req_files[line_req.name].append(req_file_path)
+                        else:
+                            yield str(installations[
+                                line_req_canonical_name]).rstrip()
+                            del installations[line_req_canonical_name]
+                            req_files[line_req.name].append(req_file_path)
+
+        # Warn about requirements that were included multiple times (in a
+        # single requirements file or in different requirements files).
+        for name, files in six.iteritems(req_files):
+            if len(files) > 1:
+                logger.warning("Requirement %s included multiple times [%s]",
+                               name, ', '.join(sorted(set(files))))
+
+        yield(
+            '## The following requirements were added by '
+            'pip freeze:'
+        )
+    for installation in sorted(
+            installations.values(), key=lambda x: x.name.lower()):
+        if installation.canonical_name not in skip:
+            yield str(installation).rstrip()
+
+
+def get_requirement_info(dist):
+    # type: (Distribution) -> RequirementInfo
+    """
+    Compute and return values (req, editable, comments) for use in
+    FrozenRequirement.from_dist().
+    """
+    if not dist_is_editable(dist):
+        return (None, False, [])
+
+    location = os.path.normcase(os.path.abspath(dist.location))
+
+    from pip._internal.vcs import vcs, RemoteNotFoundError
+    vcs_backend = vcs.get_backend_for_dir(location)
+
+    if vcs_backend is None:
+        req = dist.as_requirement()
+        logger.debug(
+            'No VCS found for editable requirement "%s" in: %r', req,
+            location,
+        )
+        comments = [
+            '# Editable install with no version control ({})'.format(req)
+        ]
+        return (location, True, comments)
+
+    try:
+        req = vcs_backend.get_src_requirement(location, dist.project_name)
+    except RemoteNotFoundError:
+        req = dist.as_requirement()
+        comments = [
+            '# Editable {} install with no remote ({})'.format(
+                type(vcs_backend).__name__, req,
+            )
+        ]
+        return (location, True, comments)
+
+    except BadCommand:
+        logger.warning(
+            'cannot determine version of editable source in %s '
+            '(%s command not found in path)',
+            location,
+            vcs_backend.name,
+        )
+        return (None, True, [])
+
+    except InstallationError as exc:
+        logger.warning(
+            "Error when trying to get requirement for VCS system %s, "
+            "falling back to uneditable format", exc
+        )
+    else:
+        if req is not None:
+            return (req, True, [])
+
+    logger.warning(
+        'Could not determine repository location of %s', location
+    )
+    comments = ['## !! Could not determine repository location']
+
+    return (None, False, comments)
+
+
+class FrozenRequirement(object):
+    def __init__(self, name, req, editable, comments=()):
+        # type: (str, Union[str, Requirement], bool, Iterable[str]) -> None
+        self.name = name
+        self.canonical_name = canonicalize_name(name)
+        self.req = req
+        self.editable = editable
+        self.comments = comments
+
+    @classmethod
+    def from_dist(cls, dist):
+        # type: (Distribution) -> FrozenRequirement
+        # TODO `get_requirement_info` is taking care of editable requirements.
+        # TODO This should be refactored when we will add detection of
+        #      editable that provide .dist-info metadata.
+        req, editable, comments = get_requirement_info(dist)
+        if req is None and not editable:
+            # if PEP 610 metadata is present, attempt to use it
+            direct_url = dist_get_direct_url(dist)
+            if direct_url:
+                req = direct_url_as_pep440_direct_reference(
+                    direct_url, dist.project_name
+                )
+                comments = []
+        if req is None:
+            # name==version requirement
+            req = dist.as_requirement()
+
+        return cls(dist.project_name, req, editable, comments=comments)
+
+    def __str__(self):
+        # type: () -> str
+        req = self.req
+        if self.editable:
+            req = '-e {}'.format(req)
+        return '\n'.join(list(self.comments) + [str(req)]) + '\n'
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/__init__.py
new file mode 100644
index 0000000..24d6a5d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/__init__.py
@@ -0,0 +1,2 @@
+"""For modules related to installing packages.
+"""
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/editable_legacy.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/editable_legacy.py
new file mode 100644
index 0000000..a668a61
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/editable_legacy.py
@@ -0,0 +1,52 @@
+"""Legacy editable installation process, i.e. `setup.py develop`.
+"""
+import logging
+
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.setuptools_build import make_setuptools_develop_args
+from pip._internal.utils.subprocess import call_subprocess
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional, Sequence
+
+    from pip._internal.build_env import BuildEnvironment
+
+
+logger = logging.getLogger(__name__)
+
+
+def install_editable(
+    install_options,  # type: List[str]
+    global_options,  # type: Sequence[str]
+    prefix,  # type: Optional[str]
+    home,  # type: Optional[str]
+    use_user_site,  # type: bool
+    name,  # type: str
+    setup_py_path,  # type: str
+    isolated,  # type: bool
+    build_env,  # type: BuildEnvironment
+    unpacked_source_directory,  # type: str
+):
+    # type: (...) -> None
+    """Install a package in editable mode. Most arguments are pass-through
+    to setuptools.
+    """
+    logger.info('Running setup.py develop for %s', name)
+
+    args = make_setuptools_develop_args(
+        setup_py_path,
+        global_options=global_options,
+        install_options=install_options,
+        no_user_config=isolated,
+        prefix=prefix,
+        home=home,
+        use_user_site=use_user_site,
+    )
+
+    with indent_log():
+        with build_env:
+            call_subprocess(
+                args,
+                cwd=unpacked_source_directory,
+            )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/legacy.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/legacy.py
new file mode 100644
index 0000000..87227d5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/legacy.py
@@ -0,0 +1,130 @@
+"""Legacy installation process, i.e. `setup.py install`.
+"""
+
+import logging
+import os
+import sys
+from distutils.util import change_root
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import ensure_dir
+from pip._internal.utils.setuptools_build import make_setuptools_install_args
+from pip._internal.utils.subprocess import runner_with_spinner_message
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional, Sequence
+
+    from pip._internal.build_env import BuildEnvironment
+    from pip._internal.models.scheme import Scheme
+
+
+logger = logging.getLogger(__name__)
+
+
+class LegacyInstallFailure(Exception):
+    def __init__(self):
+        # type: () -> None
+        self.parent = sys.exc_info()
+
+
+def install(
+    install_options,  # type: List[str]
+    global_options,  # type: Sequence[str]
+    root,  # type: Optional[str]
+    home,  # type: Optional[str]
+    prefix,  # type: Optional[str]
+    use_user_site,  # type: bool
+    pycompile,  # type: bool
+    scheme,  # type: Scheme
+    setup_py_path,  # type: str
+    isolated,  # type: bool
+    req_name,  # type: str
+    build_env,  # type: BuildEnvironment
+    unpacked_source_directory,  # type: str
+    req_description,  # type: str
+):
+    # type: (...) -> bool
+
+    header_dir = scheme.headers
+
+    with TempDirectory(kind="record") as temp_dir:
+        try:
+            record_filename = os.path.join(temp_dir.path, 'install-record.txt')
+            install_args = make_setuptools_install_args(
+                setup_py_path,
+                global_options=global_options,
+                install_options=install_options,
+                record_filename=record_filename,
+                root=root,
+                prefix=prefix,
+                header_dir=header_dir,
+                home=home,
+                use_user_site=use_user_site,
+                no_user_config=isolated,
+                pycompile=pycompile,
+            )
+
+            runner = runner_with_spinner_message(
+                "Running setup.py install for {}".format(req_name)
+            )
+            with indent_log(), build_env:
+                runner(
+                    cmd=install_args,
+                    cwd=unpacked_source_directory,
+                )
+
+            if not os.path.exists(record_filename):
+                logger.debug('Record file %s not found', record_filename)
+                # Signal to the caller that we didn't install the new package
+                return False
+
+        except Exception:
+            # Signal to the caller that we didn't install the new package
+            raise LegacyInstallFailure
+
+        # At this point, we have successfully installed the requirement.
+
+        # We intentionally do not use any encoding to read the file because
+        # setuptools writes the file using distutils.file_util.write_file,
+        # which does not specify an encoding.
+        with open(record_filename) as f:
+            record_lines = f.read().splitlines()
+
+    def prepend_root(path):
+        # type: (str) -> str
+        if root is None or not os.path.isabs(path):
+            return path
+        else:
+            return change_root(root, path)
+
+    for line in record_lines:
+        directory = os.path.dirname(line)
+        if directory.endswith('.egg-info'):
+            egg_info_dir = prepend_root(directory)
+            break
+    else:
+        message = (
+            "{} did not indicate that it installed an "
+            ".egg-info directory. Only setup.py projects "
+            "generating .egg-info directories are supported."
+        ).format(req_description)
+        raise InstallationError(message)
+
+    new_lines = []
+    for line in record_lines:
+        filename = line.strip()
+        if os.path.isdir(filename):
+            filename += os.path.sep
+        new_lines.append(
+            os.path.relpath(prepend_root(filename), egg_info_dir)
+        )
+    new_lines.sort()
+    ensure_dir(egg_info_dir)
+    inst_files_path = os.path.join(egg_info_dir, 'installed-files.txt')
+    with open(inst_files_path, 'w') as f:
+        f.write('\n'.join(new_lines) + '\n')
+
+    return True
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/wheel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/wheel.py
new file mode 100644
index 0000000..e91b1b8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/install/wheel.py
@@ -0,0 +1,861 @@
+"""Support for installing and building the "wheel" binary package format.
+"""
+
+from __future__ import absolute_import
+
+import collections
+import compileall
+import contextlib
+import csv
+import importlib
+import logging
+import os.path
+import re
+import shutil
+import sys
+import warnings
+from base64 import urlsafe_b64encode
+from itertools import chain, starmap
+from zipfile import ZipFile
+
+from pip._vendor import pkg_resources
+from pip._vendor.distlib.scripts import ScriptMaker
+from pip._vendor.distlib.util import get_export_entry
+from pip._vendor.six import (
+    PY2,
+    ensure_str,
+    ensure_text,
+    itervalues,
+    reraise,
+    text_type,
+)
+from pip._vendor.six.moves import filterfalse, map
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.locations import get_major_minor_version
+from pip._internal.models.direct_url import DIRECT_URL_METADATA_NAME, DirectUrl
+from pip._internal.models.scheme import SCHEME_KEYS
+from pip._internal.utils.filesystem import adjacent_tmp_file, replace
+from pip._internal.utils.misc import (
+    captured_stdout,
+    ensure_dir,
+    hash_file,
+    partition,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.unpacking import (
+    current_umask,
+    is_within_directory,
+    set_extracted_file_to_default_mode_plus_executable,
+    zip_item_is_executable,
+)
+from pip._internal.utils.wheel import (
+    parse_wheel,
+    pkg_resources_distribution_for_wheel,
+)
+
+# Use the custom cast function at runtime to make cast work,
+# and import typing.cast when performing pre-commit and type
+# checks
+if not MYPY_CHECK_RUNNING:
+    from pip._internal.utils.typing import cast
+else:
+    from email.message import Message
+    from typing import (
+        Any,
+        Callable,
+        Dict,
+        IO,
+        Iterable,
+        Iterator,
+        List,
+        NewType,
+        Optional,
+        Protocol,
+        Sequence,
+        Set,
+        Tuple,
+        Union,
+        cast,
+    )
+    from zipfile import ZipInfo
+
+    from pip._vendor.pkg_resources import Distribution
+
+    from pip._internal.models.scheme import Scheme
+    from pip._internal.utils.filesystem import NamedTemporaryFileResult
+
+    RecordPath = NewType('RecordPath', text_type)
+    InstalledCSVRow = Tuple[RecordPath, str, Union[int, str]]
+
+    class File(Protocol):
+        src_record_path = None  # type: RecordPath
+        dest_path = None  # type: text_type
+        changed = None  # type: bool
+
+        def save(self):
+            # type: () -> None
+            pass
+
+
+logger = logging.getLogger(__name__)
+
+
+def rehash(path, blocksize=1 << 20):
+    # type: (text_type, int) -> Tuple[str, str]
+    """Return (encoded_digest, length) for path using hashlib.sha256()"""
+    h, length = hash_file(path, blocksize)
+    digest = 'sha256=' + urlsafe_b64encode(
+        h.digest()
+    ).decode('latin1').rstrip('=')
+    # unicode/str python2 issues
+    return (digest, str(length))  # type: ignore
+
+
+def csv_io_kwargs(mode):
+    # type: (str) -> Dict[str, Any]
+    """Return keyword arguments to properly open a CSV file
+    in the given mode.
+    """
+    if PY2:
+        return {'mode': '{}b'.format(mode)}
+    else:
+        return {'mode': mode, 'newline': '', 'encoding': 'utf-8'}
+
+
+def fix_script(path):
+    # type: (text_type) -> bool
+    """Replace #!python with #!/path/to/python
+    Return True if file was changed.
+    """
+    # XXX RECORD hashes will need to be updated
+    assert os.path.isfile(path)
+
+    with open(path, 'rb') as script:
+        firstline = script.readline()
+        if not firstline.startswith(b'#!python'):
+            return False
+        exename = sys.executable.encode(sys.getfilesystemencoding())
+        firstline = b'#!' + exename + os.linesep.encode("ascii")
+        rest = script.read()
+    with open(path, 'wb') as script:
+        script.write(firstline)
+        script.write(rest)
+    return True
+
+
+def wheel_root_is_purelib(metadata):
+    # type: (Message) -> bool
+    return metadata.get("Root-Is-Purelib", "").lower() == "true"
+
+
+def get_entrypoints(distribution):
+    # type: (Distribution) -> Tuple[Dict[str, str], Dict[str, str]]
+    # get the entry points and then the script names
+    try:
+        console = distribution.get_entry_map('console_scripts')
+        gui = distribution.get_entry_map('gui_scripts')
+    except KeyError:
+        # Our dict-based Distribution raises KeyError if entry_points.txt
+        # doesn't exist.
+        return {}, {}
+
+    def _split_ep(s):
+        # type: (pkg_resources.EntryPoint) -> Tuple[str, str]
+        """get the string representation of EntryPoint,
+        remove space and split on '='
+        """
+        split_parts = str(s).replace(" ", "").split("=")
+        return split_parts[0], split_parts[1]
+
+    # convert the EntryPoint objects into strings with module:function
+    console = dict(_split_ep(v) for v in console.values())
+    gui = dict(_split_ep(v) for v in gui.values())
+    return console, gui
+
+
+def message_about_scripts_not_on_PATH(scripts):
+    # type: (Sequence[str]) -> Optional[str]
+    """Determine if any scripts are not on PATH and format a warning.
+    Returns a warning message if one or more scripts are not on PATH,
+    otherwise None.
+    """
+    if not scripts:
+        return None
+
+    # Group scripts by the path they were installed in
+    grouped_by_dir = collections.defaultdict(set)  # type: Dict[str, Set[str]]
+    for destfile in scripts:
+        parent_dir = os.path.dirname(destfile)
+        script_name = os.path.basename(destfile)
+        grouped_by_dir[parent_dir].add(script_name)
+
+    # We don't want to warn for directories that are on PATH.
+    not_warn_dirs = [
+        os.path.normcase(i).rstrip(os.sep) for i in
+        os.environ.get("PATH", "").split(os.pathsep)
+    ]
+    # If an executable sits with sys.executable, we don't warn for it.
+    #     This covers the case of venv invocations without activating the venv.
+    not_warn_dirs.append(os.path.normcase(os.path.dirname(sys.executable)))
+    warn_for = {
+        parent_dir: scripts for parent_dir, scripts in grouped_by_dir.items()
+        if os.path.normcase(parent_dir) not in not_warn_dirs
+    }  # type: Dict[str, Set[str]]
+    if not warn_for:
+        return None
+
+    # Format a message
+    msg_lines = []
+    for parent_dir, dir_scripts in warn_for.items():
+        sorted_scripts = sorted(dir_scripts)  # type: List[str]
+        if len(sorted_scripts) == 1:
+            start_text = "script {} is".format(sorted_scripts[0])
+        else:
+            start_text = "scripts {} are".format(
+                ", ".join(sorted_scripts[:-1]) + " and " + sorted_scripts[-1]
+            )
+
+        msg_lines.append(
+            "The {} installed in '{}' which is not on PATH."
+            .format(start_text, parent_dir)
+        )
+
+    last_line_fmt = (
+        "Consider adding {} to PATH or, if you prefer "
+        "to suppress this warning, use --no-warn-script-location."
+    )
+    if len(msg_lines) == 1:
+        msg_lines.append(last_line_fmt.format("this directory"))
+    else:
+        msg_lines.append(last_line_fmt.format("these directories"))
+
+    # Add a note if any directory starts with ~
+    warn_for_tilde = any(
+        i[0] == "~" for i in os.environ.get("PATH", "").split(os.pathsep) if i
+    )
+    if warn_for_tilde:
+        tilde_warning_msg = (
+            "NOTE: The current PATH contains path(s) starting with `~`, "
+            "which may not be expanded by all applications."
+        )
+        msg_lines.append(tilde_warning_msg)
+
+    # Returns the formatted multiline message
+    return "\n".join(msg_lines)
+
+
+def _normalized_outrows(outrows):
+    # type: (Iterable[InstalledCSVRow]) -> List[Tuple[str, str, str]]
+    """Normalize the given rows of a RECORD file.
+
+    Items in each row are converted into str. Rows are then sorted to make
+    the value more predictable for tests.
+
+    Each row is a 3-tuple (path, hash, size) and corresponds to a record of
+    a RECORD file (see PEP 376 and PEP 427 for details).  For the rows
+    passed to this function, the size can be an integer as an int or string,
+    or the empty string.
+    """
+    # Normally, there should only be one row per path, in which case the
+    # second and third elements don't come into play when sorting.
+    # However, in cases in the wild where a path might happen to occur twice,
+    # we don't want the sort operation to trigger an error (but still want
+    # determinism).  Since the third element can be an int or string, we
+    # coerce each element to a string to avoid a TypeError in this case.
+    # For additional background, see--
+    # https://github.com/pypa/pip/issues/5868
+    return sorted(
+        (ensure_str(record_path, encoding='utf-8'), hash_, str(size))
+        for record_path, hash_, size in outrows
+    )
+
+
+def _record_to_fs_path(record_path):
+    # type: (RecordPath) -> text_type
+    return record_path
+
+
+def _fs_to_record_path(path, relative_to=None):
+    # type: (text_type, Optional[text_type]) -> RecordPath
+    if relative_to is not None:
+        # On Windows, do not handle relative paths if they belong to different
+        # logical disks
+        if os.path.splitdrive(path)[0].lower() == \
+                os.path.splitdrive(relative_to)[0].lower():
+            path = os.path.relpath(path, relative_to)
+    path = path.replace(os.path.sep, '/')
+    return cast('RecordPath', path)
+
+
+def _parse_record_path(record_column):
+    # type: (str) -> RecordPath
+    p = ensure_text(record_column, encoding='utf-8')
+    return cast('RecordPath', p)
+
+
+def get_csv_rows_for_installed(
+    old_csv_rows,  # type: List[List[str]]
+    installed,  # type: Dict[RecordPath, RecordPath]
+    changed,  # type: Set[RecordPath]
+    generated,  # type: List[str]
+    lib_dir,  # type: str
+):
+    # type: (...) -> List[InstalledCSVRow]
+    """
+    :param installed: A map from archive RECORD path to installation RECORD
+        path.
+    """
+    installed_rows = []  # type: List[InstalledCSVRow]
+    for row in old_csv_rows:
+        if len(row) > 3:
+            logger.warning('RECORD line has more than three elements: %s', row)
+        old_record_path = _parse_record_path(row[0])
+        new_record_path = installed.pop(old_record_path, old_record_path)
+        if new_record_path in changed:
+            digest, length = rehash(_record_to_fs_path(new_record_path))
+        else:
+            digest = row[1] if len(row) > 1 else ''
+            length = row[2] if len(row) > 2 else ''
+        installed_rows.append((new_record_path, digest, length))
+    for f in generated:
+        path = _fs_to_record_path(f, lib_dir)
+        digest, length = rehash(f)
+        installed_rows.append((path, digest, length))
+    for installed_record_path in itervalues(installed):
+        installed_rows.append((installed_record_path, '', ''))
+    return installed_rows
+
+
+def get_console_script_specs(console):
+    # type: (Dict[str, str]) -> List[str]
+    """
+    Given the mapping from entrypoint name to callable, return the relevant
+    console script specs.
+    """
+    # Don't mutate caller's version
+    console = console.copy()
+
+    scripts_to_generate = []
+
+    # Special case pip and setuptools to generate versioned wrappers
+    #
+    # The issue is that some projects (specifically, pip and setuptools) use
+    # code in setup.py to create "versioned" entry points - pip2.7 on Python
+    # 2.7, pip3.3 on Python 3.3, etc. But these entry points are baked into
+    # the wheel metadata at build time, and so if the wheel is installed with
+    # a *different* version of Python the entry points will be wrong. The
+    # correct fix for this is to enhance the metadata to be able to describe
+    # such versioned entry points, but that won't happen till Metadata 2.0 is
+    # available.
+    # In the meantime, projects using versioned entry points will either have
+    # incorrect versioned entry points, or they will not be able to distribute
+    # "universal" wheels (i.e., they will need a wheel per Python version).
+    #
+    # Because setuptools and pip are bundled with _ensurepip and virtualenv,
+    # we need to use universal wheels. So, as a stopgap until Metadata 2.0, we
+    # override the versioned entry points in the wheel and generate the
+    # correct ones. This code is purely a short-term measure until Metadata 2.0
+    # is available.
+    #
+    # To add the level of hack in this section of code, in order to support
+    # ensurepip this code will look for an ``ENSUREPIP_OPTIONS`` environment
+    # variable which will control which version scripts get installed.
+    #
+    # ENSUREPIP_OPTIONS=altinstall
+    #   - Only pipX.Y and easy_install-X.Y will be generated and installed
+    # ENSUREPIP_OPTIONS=install
+    #   - pipX.Y, pipX, easy_install-X.Y will be generated and installed. Note
+    #     that this option is technically if ENSUREPIP_OPTIONS is set and is
+    #     not altinstall
+    # DEFAULT
+    #   - The default behavior is to install pip, pipX, pipX.Y, easy_install
+    #     and easy_install-X.Y.
+    pip_script = console.pop('pip', None)
+    if pip_script:
+        if "ENSUREPIP_OPTIONS" not in os.environ:
+            scripts_to_generate.append('pip = ' + pip_script)
+
+        if os.environ.get("ENSUREPIP_OPTIONS", "") != "altinstall":
+            scripts_to_generate.append(
+                'pip{} = {}'.format(sys.version_info[0], pip_script)
+            )
+
+        scripts_to_generate.append(
+            'pip{} = {}'.format(get_major_minor_version(), pip_script)
+        )
+        # Delete any other versioned pip entry points
+        pip_ep = [k for k in console if re.match(r'pip(\d(\.\d)?)?$', k)]
+        for k in pip_ep:
+            del console[k]
+    easy_install_script = console.pop('easy_install', None)
+    if easy_install_script:
+        if "ENSUREPIP_OPTIONS" not in os.environ:
+            scripts_to_generate.append(
+                'easy_install = ' + easy_install_script
+            )
+
+        scripts_to_generate.append(
+            'easy_install-{} = {}'.format(
+                get_major_minor_version(), easy_install_script
+            )
+        )
+        # Delete any other versioned easy_install entry points
+        easy_install_ep = [
+            k for k in console if re.match(r'easy_install(-\d\.\d)?$', k)
+        ]
+        for k in easy_install_ep:
+            del console[k]
+
+    # Generate the console entry points specified in the wheel
+    scripts_to_generate.extend(starmap('{} = {}'.format, console.items()))
+
+    return scripts_to_generate
+
+
+class ZipBackedFile(object):
+    def __init__(self, src_record_path, dest_path, zip_file):
+        # type: (RecordPath, text_type, ZipFile) -> None
+        self.src_record_path = src_record_path
+        self.dest_path = dest_path
+        self._zip_file = zip_file
+        self.changed = False
+
+    def _getinfo(self):
+        # type: () -> ZipInfo
+        if not PY2:
+            return self._zip_file.getinfo(self.src_record_path)
+        # Python 2 does not expose a way to detect a ZIP's encoding, but the
+        # wheel specification (PEP 427) explicitly mandates that paths should
+        # use UTF-8, so we assume it is true.
+        return self._zip_file.getinfo(self.src_record_path.encode("utf-8"))
+
+    def save(self):
+        # type: () -> None
+        # directory creation is lazy and after file filtering
+        # to ensure we don't install empty dirs; empty dirs can't be
+        # uninstalled.
+        parent_dir = os.path.dirname(self.dest_path)
+        ensure_dir(parent_dir)
+
+        # When we open the output file below, any existing file is truncated
+        # before we start writing the new contents. This is fine in most
+        # cases, but can cause a segfault if pip has loaded a shared
+        # object (e.g. from pyopenssl through its vendored urllib3)
+        # Since the shared object is mmap'd an attempt to call a
+        # symbol in it will then cause a segfault. Unlinking the file
+        # allows writing of new contents while allowing the process to
+        # continue to use the old copy.
+        if os.path.exists(self.dest_path):
+            os.unlink(self.dest_path)
+
+        zipinfo = self._getinfo()
+
+        with self._zip_file.open(zipinfo) as f:
+            with open(self.dest_path, "wb") as dest:
+                shutil.copyfileobj(f, dest)
+
+        if zip_item_is_executable(zipinfo):
+            set_extracted_file_to_default_mode_plus_executable(self.dest_path)
+
+
+class ScriptFile(object):
+    def __init__(self, file):
+        # type: (File) -> None
+        self._file = file
+        self.src_record_path = self._file.src_record_path
+        self.dest_path = self._file.dest_path
+        self.changed = False
+
+    def save(self):
+        # type: () -> None
+        self._file.save()
+        self.changed = fix_script(self.dest_path)
+
+
+class MissingCallableSuffix(InstallationError):
+    def __init__(self, entry_point):
+        # type: (str) -> None
+        super(MissingCallableSuffix, self).__init__(
+            "Invalid script entry point: {} - A callable "
+            "suffix is required. Cf https://packaging.python.org/"
+            "specifications/entry-points/#use-for-scripts for more "
+            "information.".format(entry_point)
+        )
+
+
+def _raise_for_invalid_entrypoint(specification):
+    # type: (str) -> None
+    entry = get_export_entry(specification)
+    if entry is not None and entry.suffix is None:
+        raise MissingCallableSuffix(str(entry))
+
+
+class PipScriptMaker(ScriptMaker):
+    def make(self, specification, options=None):
+        # type: (str, Dict[str, Any]) -> List[str]
+        _raise_for_invalid_entrypoint(specification)
+        return super(PipScriptMaker, self).make(specification, options)
+
+
+def _install_wheel(
+    name,  # type: str
+    wheel_zip,  # type: ZipFile
+    wheel_path,  # type: str
+    scheme,  # type: Scheme
+    pycompile=True,  # type: bool
+    warn_script_location=True,  # type: bool
+    direct_url=None,  # type: Optional[DirectUrl]
+    requested=False,  # type: bool
+):
+    # type: (...) -> None
+    """Install a wheel.
+
+    :param name: Name of the project to install
+    :param wheel_zip: open ZipFile for wheel being installed
+    :param scheme: Distutils scheme dictating the install directories
+    :param req_description: String used in place of the requirement, for
+        logging
+    :param pycompile: Whether to byte-compile installed Python files
+    :param warn_script_location: Whether to check that scripts are installed
+        into a directory on PATH
+    :raises UnsupportedWheel:
+        * when the directory holds an unpacked wheel with incompatible
+          Wheel-Version
+        * when the .dist-info dir does not match the wheel
+    """
+    info_dir, metadata = parse_wheel(wheel_zip, name)
+
+    if wheel_root_is_purelib(metadata):
+        lib_dir = scheme.purelib
+    else:
+        lib_dir = scheme.platlib
+
+    # Record details of the files moved
+    #   installed = files copied from the wheel to the destination
+    #   changed = files changed while installing (scripts #! line typically)
+    #   generated = files newly generated during the install (script wrappers)
+    installed = {}  # type: Dict[RecordPath, RecordPath]
+    changed = set()  # type: Set[RecordPath]
+    generated = []  # type: List[str]
+
+    def record_installed(srcfile, destfile, modified=False):
+        # type: (RecordPath, text_type, bool) -> None
+        """Map archive RECORD paths to installation RECORD paths."""
+        newpath = _fs_to_record_path(destfile, lib_dir)
+        installed[srcfile] = newpath
+        if modified:
+            changed.add(_fs_to_record_path(destfile))
+
+    def all_paths():
+        # type: () -> Iterable[RecordPath]
+        names = wheel_zip.namelist()
+        # If a flag is set, names may be unicode in Python 2. We convert to
+        # text explicitly so these are valid for lookup in RECORD.
+        decoded_names = map(ensure_text, names)
+        for name in decoded_names:
+            yield cast("RecordPath", name)
+
+    def is_dir_path(path):
+        # type: (RecordPath) -> bool
+        return path.endswith("/")
+
+    def assert_no_path_traversal(dest_dir_path, target_path):
+        # type: (text_type, text_type) -> None
+        if not is_within_directory(dest_dir_path, target_path):
+            message = (
+                "The wheel {!r} has a file {!r} trying to install"
+                " outside the target directory {!r}"
+            )
+            raise InstallationError(
+                message.format(wheel_path, target_path, dest_dir_path)
+            )
+
+    def root_scheme_file_maker(zip_file, dest):
+        # type: (ZipFile, text_type) -> Callable[[RecordPath], File]
+        def make_root_scheme_file(record_path):
+            # type: (RecordPath) -> File
+            normed_path = os.path.normpath(record_path)
+            dest_path = os.path.join(dest, normed_path)
+            assert_no_path_traversal(dest, dest_path)
+            return ZipBackedFile(record_path, dest_path, zip_file)
+
+        return make_root_scheme_file
+
+    def data_scheme_file_maker(zip_file, scheme):
+        # type: (ZipFile, Scheme) -> Callable[[RecordPath], File]
+        scheme_paths = {}
+        for key in SCHEME_KEYS:
+            encoded_key = ensure_text(key)
+            scheme_paths[encoded_key] = ensure_text(
+                getattr(scheme, key), encoding=sys.getfilesystemencoding()
+            )
+
+        def make_data_scheme_file(record_path):
+            # type: (RecordPath) -> File
+            normed_path = os.path.normpath(record_path)
+            try:
+                _, scheme_key, dest_subpath = normed_path.split(os.path.sep, 2)
+            except ValueError:
+                message = (
+                    "Unexpected file in {}: {!r}. .data directory contents"
+                    " should be named like: '<scheme key>/<path>'."
+                ).format(wheel_path, record_path)
+                raise InstallationError(message)
+
+            try:
+                scheme_path = scheme_paths[scheme_key]
+            except KeyError:
+                valid_scheme_keys = ", ".join(sorted(scheme_paths))
+                message = (
+                    "Unknown scheme key used in {}: {} (for file {!r}). .data"
+                    " directory contents should be in subdirectories named"
+                    " with a valid scheme key ({})"
+                ).format(
+                    wheel_path, scheme_key, record_path, valid_scheme_keys
+                )
+                raise InstallationError(message)
+
+            dest_path = os.path.join(scheme_path, dest_subpath)
+            assert_no_path_traversal(scheme_path, dest_path)
+            return ZipBackedFile(record_path, dest_path, zip_file)
+
+        return make_data_scheme_file
+
+    def is_data_scheme_path(path):
+        # type: (RecordPath) -> bool
+        return path.split("/", 1)[0].endswith(".data")
+
+    paths = all_paths()
+    file_paths = filterfalse(is_dir_path, paths)
+    root_scheme_paths, data_scheme_paths = partition(
+        is_data_scheme_path, file_paths
+    )
+
+    make_root_scheme_file = root_scheme_file_maker(
+        wheel_zip,
+        ensure_text(lib_dir, encoding=sys.getfilesystemencoding()),
+    )
+    files = map(make_root_scheme_file, root_scheme_paths)
+
+    def is_script_scheme_path(path):
+        # type: (RecordPath) -> bool
+        parts = path.split("/", 2)
+        return (
+            len(parts) > 2 and
+            parts[0].endswith(".data") and
+            parts[1] == "scripts"
+        )
+
+    other_scheme_paths, script_scheme_paths = partition(
+        is_script_scheme_path, data_scheme_paths
+    )
+
+    make_data_scheme_file = data_scheme_file_maker(wheel_zip, scheme)
+    other_scheme_files = map(make_data_scheme_file, other_scheme_paths)
+    files = chain(files, other_scheme_files)
+
+    # Get the defined entry points
+    distribution = pkg_resources_distribution_for_wheel(
+        wheel_zip, name, wheel_path
+    )
+    console, gui = get_entrypoints(distribution)
+
+    def is_entrypoint_wrapper(file):
+        # type: (File) -> bool
+        # EP, EP.exe and EP-script.py are scripts generated for
+        # entry point EP by setuptools
+        path = file.dest_path
+        name = os.path.basename(path)
+        if name.lower().endswith('.exe'):
+            matchname = name[:-4]
+        elif name.lower().endswith('-script.py'):
+            matchname = name[:-10]
+        elif name.lower().endswith(".pya"):
+            matchname = name[:-4]
+        else:
+            matchname = name
+        # Ignore setuptools-generated scripts
+        return (matchname in console or matchname in gui)
+
+    script_scheme_files = map(make_data_scheme_file, script_scheme_paths)
+    script_scheme_files = filterfalse(
+        is_entrypoint_wrapper, script_scheme_files
+    )
+    script_scheme_files = map(ScriptFile, script_scheme_files)
+    files = chain(files, script_scheme_files)
+
+    for file in files:
+        file.save()
+        record_installed(file.src_record_path, file.dest_path, file.changed)
+
+    def pyc_source_file_paths():
+        # type: () -> Iterator[text_type]
+        # We de-duplicate installation paths, since there can be overlap (e.g.
+        # file in .data maps to same location as file in wheel root).
+        # Sorting installation paths makes it easier to reproduce and debug
+        # issues related to permissions on existing files.
+        for installed_path in sorted(set(installed.values())):
+            full_installed_path = os.path.join(lib_dir, installed_path)
+            if not os.path.isfile(full_installed_path):
+                continue
+            if not full_installed_path.endswith('.py'):
+                continue
+            yield full_installed_path
+
+    def pyc_output_path(path):
+        # type: (text_type) -> text_type
+        """Return the path the pyc file would have been written to.
+        """
+        if PY2:
+            if sys.flags.optimize:
+                return path + 'o'
+            else:
+                return path + 'c'
+        else:
+            return importlib.util.cache_from_source(path)
+
+    # Compile all of the pyc files for the installed files
+    if pycompile:
+        with captured_stdout() as stdout:
+            with warnings.catch_warnings():
+                warnings.filterwarnings('ignore')
+                for path in pyc_source_file_paths():
+                    # Python 2's `compileall.compile_file` requires a str in
+                    # error cases, so we must convert to the native type.
+                    path_arg = ensure_str(
+                        path, encoding=sys.getfilesystemencoding()
+                    )
+                    success = compileall.compile_file(
+                        path_arg, force=True, quiet=True
+                    )
+                    if success:
+                        pyc_path = pyc_output_path(path)
+                        assert os.path.exists(pyc_path)
+                        pyc_record_path = cast(
+                            "RecordPath", pyc_path.replace(os.path.sep, "/")
+                        )
+                        record_installed(pyc_record_path, pyc_path)
+        logger.debug(stdout.getvalue())
+
+    maker = PipScriptMaker(None, scheme.scripts)
+
+    # Ensure old scripts are overwritten.
+    # See https://github.com/pypa/pip/issues/1800
+    maker.clobber = True
+
+    # Ensure we don't generate any variants for scripts because this is almost
+    # never what somebody wants.
+    # See https://bitbucket.org/pypa/distlib/issue/35/
+    maker.variants = {''}
+
+    # This is required because otherwise distlib creates scripts that are not
+    # executable.
+    # See https://bitbucket.org/pypa/distlib/issue/32/
+    maker.set_mode = True
+
+    # Generate the console and GUI entry points specified in the wheel
+    scripts_to_generate = get_console_script_specs(console)
+
+    gui_scripts_to_generate = list(starmap('{} = {}'.format, gui.items()))
+
+    generated_console_scripts = maker.make_multiple(scripts_to_generate)
+    generated.extend(generated_console_scripts)
+
+    generated.extend(
+        maker.make_multiple(gui_scripts_to_generate, {'gui': True})
+    )
+
+    if warn_script_location:
+        msg = message_about_scripts_not_on_PATH(generated_console_scripts)
+        if msg is not None:
+            logger.warning(msg)
+
+    generated_file_mode = 0o666 & ~current_umask()
+
+    @contextlib.contextmanager
+    def _generate_file(path, **kwargs):
+        # type: (str, **Any) -> Iterator[NamedTemporaryFileResult]
+        with adjacent_tmp_file(path, **kwargs) as f:
+            yield f
+        os.chmod(f.name, generated_file_mode)
+        replace(f.name, path)
+
+    dest_info_dir = os.path.join(lib_dir, info_dir)
+
+    # Record pip as the installer
+    installer_path = os.path.join(dest_info_dir, 'INSTALLER')
+    with _generate_file(installer_path) as installer_file:
+        installer_file.write(b'pip\n')
+    generated.append(installer_path)
+
+    # Record the PEP 610 direct URL reference
+    if direct_url is not None:
+        direct_url_path = os.path.join(dest_info_dir, DIRECT_URL_METADATA_NAME)
+        with _generate_file(direct_url_path) as direct_url_file:
+            direct_url_file.write(direct_url.to_json().encode("utf-8"))
+        generated.append(direct_url_path)
+
+    # Record the REQUESTED file
+    if requested:
+        requested_path = os.path.join(dest_info_dir, 'REQUESTED')
+        with open(requested_path, "w"):
+            pass
+        generated.append(requested_path)
+
+    record_text = distribution.get_metadata('RECORD')
+    record_rows = list(csv.reader(record_text.splitlines()))
+
+    rows = get_csv_rows_for_installed(
+        record_rows,
+        installed=installed,
+        changed=changed,
+        generated=generated,
+        lib_dir=lib_dir)
+
+    # Record details of all files installed
+    record_path = os.path.join(dest_info_dir, 'RECORD')
+
+    with _generate_file(record_path, **csv_io_kwargs('w')) as record_file:
+        # The type mypy infers for record_file is different for Python 3
+        # (typing.IO[Any]) and Python 2 (typing.BinaryIO). We explicitly
+        # cast to typing.IO[str] as a workaround.
+        writer = csv.writer(cast('IO[str]', record_file))
+        writer.writerows(_normalized_outrows(rows))
+
+
+@contextlib.contextmanager
+def req_error_context(req_description):
+    # type: (str) -> Iterator[None]
+    try:
+        yield
+    except InstallationError as e:
+        message = "For req: {}. {}".format(req_description, e.args[0])
+        reraise(
+            InstallationError, InstallationError(message), sys.exc_info()[2]
+        )
+
+
+def install_wheel(
+    name,  # type: str
+    wheel_path,  # type: str
+    scheme,  # type: Scheme
+    req_description,  # type: str
+    pycompile=True,  # type: bool
+    warn_script_location=True,  # type: bool
+    direct_url=None,  # type: Optional[DirectUrl]
+    requested=False,  # type: bool
+):
+    # type: (...) -> None
+    with ZipFile(wheel_path, allowZip64=True) as z:
+        with req_error_context(req_description):
+            _install_wheel(
+                name=name,
+                wheel_zip=z,
+                wheel_path=wheel_path,
+                scheme=scheme,
+                pycompile=pycompile,
+                warn_script_location=warn_script_location,
+                direct_url=direct_url,
+                requested=requested,
+            )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/prepare.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/prepare.py
new file mode 100644
index 0000000..a5455fc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/operations/prepare.py
@@ -0,0 +1,562 @@
+"""Prepares a distribution for installation
+"""
+
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+import logging
+import mimetypes
+import os
+import shutil
+
+from pip._vendor.six import PY2
+
+from pip._internal.distributions import (
+    make_distribution_for_install_requirement,
+)
+from pip._internal.distributions.installed import InstalledDistribution
+from pip._internal.exceptions import (
+    DirectoryUrlHashUnsupported,
+    HashMismatch,
+    HashUnpinned,
+    InstallationError,
+    NetworkConnectionError,
+    PreviousBuildDirError,
+    VcsHashUnsupported,
+)
+from pip._internal.utils.filesystem import copy2_fixed
+from pip._internal.utils.hashes import MissingHashes
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import (
+    display_path,
+    hide_url,
+    path_to_display,
+    rmtree,
+)
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.unpacking import unpack_file
+from pip._internal.vcs import vcs
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Callable, List, Optional, Tuple,
+    )
+
+    from mypy_extensions import TypedDict
+
+    from pip._internal.distributions import AbstractDistribution
+    from pip._internal.index.package_finder import PackageFinder
+    from pip._internal.models.link import Link
+    from pip._internal.network.download import Downloader
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.req.req_tracker import RequirementTracker
+    from pip._internal.utils.hashes import Hashes
+
+    if PY2:
+        CopytreeKwargs = TypedDict(
+            'CopytreeKwargs',
+            {
+                'ignore': Callable[[str, List[str]], List[str]],
+                'symlinks': bool,
+            },
+            total=False,
+        )
+    else:
+        CopytreeKwargs = TypedDict(
+            'CopytreeKwargs',
+            {
+                'copy_function': Callable[[str, str], None],
+                'ignore': Callable[[str, List[str]], List[str]],
+                'ignore_dangling_symlinks': bool,
+                'symlinks': bool,
+            },
+            total=False,
+        )
+
+logger = logging.getLogger(__name__)
+
+
+def _get_prepared_distribution(
+        req,  # type: InstallRequirement
+        req_tracker,  # type: RequirementTracker
+        finder,  # type: PackageFinder
+        build_isolation  # type: bool
+):
+    # type: (...) -> AbstractDistribution
+    """Prepare a distribution for installation.
+    """
+    abstract_dist = make_distribution_for_install_requirement(req)
+    with req_tracker.track(req):
+        abstract_dist.prepare_distribution_metadata(finder, build_isolation)
+    return abstract_dist
+
+
+def unpack_vcs_link(link, location):
+    # type: (Link, str) -> None
+    vcs_backend = vcs.get_backend_for_scheme(link.scheme)
+    assert vcs_backend is not None
+    vcs_backend.unpack(location, url=hide_url(link.url))
+
+
+class File(object):
+    def __init__(self, path, content_type):
+        # type: (str, str) -> None
+        self.path = path
+        self.content_type = content_type
+
+
+def get_http_url(
+    link,  # type: Link
+    downloader,  # type: Downloader
+    download_dir=None,  # type: Optional[str]
+    hashes=None,  # type: Optional[Hashes]
+):
+    # type: (...) -> File
+    temp_dir = TempDirectory(kind="unpack", globally_managed=True)
+    # If a download dir is specified, is the file already downloaded there?
+    already_downloaded_path = None
+    if download_dir:
+        already_downloaded_path = _check_download_dir(
+            link, download_dir, hashes
+        )
+
+    if already_downloaded_path:
+        from_path = already_downloaded_path
+        content_type = mimetypes.guess_type(from_path)[0]
+    else:
+        # let's download to a tmp dir
+        from_path, content_type = _download_http_url(
+            link, downloader, temp_dir.path, hashes
+        )
+
+    return File(from_path, content_type)
+
+
+def _copy2_ignoring_special_files(src, dest):
+    # type: (str, str) -> None
+    """Copying special files is not supported, but as a convenience to users
+    we skip errors copying them. This supports tools that may create e.g.
+    socket files in the project source directory.
+    """
+    try:
+        copy2_fixed(src, dest)
+    except shutil.SpecialFileError as e:
+        # SpecialFileError may be raised due to either the source or
+        # destination. If the destination was the cause then we would actually
+        # care, but since the destination directory is deleted prior to
+        # copy we ignore all of them assuming it is caused by the source.
+        logger.warning(
+            "Ignoring special file error '%s' encountered copying %s to %s.",
+            str(e),
+            path_to_display(src),
+            path_to_display(dest),
+        )
+
+
+def _copy_source_tree(source, target):
+    # type: (str, str) -> None
+    target_abspath = os.path.abspath(target)
+    target_basename = os.path.basename(target_abspath)
+    target_dirname = os.path.dirname(target_abspath)
+
+    def ignore(d, names):
+        # type: (str, List[str]) -> List[str]
+        skipped = []  # type: List[str]
+        if d == source:
+            # Pulling in those directories can potentially be very slow,
+            # exclude the following directories if they appear in the top
+            # level dir (and only it).
+            # See discussion at https://github.com/pypa/pip/pull/6770
+            skipped += ['.tox', '.nox']
+        if os.path.abspath(d) == target_dirname:
+            # Prevent an infinite recursion if the target is in source.
+            # This can happen when TMPDIR is set to ${PWD}/...
+            # and we copy PWD to TMPDIR.
+            skipped += [target_basename]
+        return skipped
+
+    kwargs = dict(ignore=ignore, symlinks=True)  # type: CopytreeKwargs
+
+    if not PY2:
+        # Python 2 does not support copy_function, so we only ignore
+        # errors on special file copy in Python 3.
+        kwargs['copy_function'] = _copy2_ignoring_special_files
+
+    shutil.copytree(source, target, **kwargs)
+
+
+def get_file_url(
+    link,  # type: Link
+    download_dir=None,  # type: Optional[str]
+    hashes=None  # type: Optional[Hashes]
+):
+    # type: (...) -> File
+    """Get file and optionally check its hash.
+    """
+    # If a download dir is specified, is the file already there and valid?
+    already_downloaded_path = None
+    if download_dir:
+        already_downloaded_path = _check_download_dir(
+            link, download_dir, hashes
+        )
+
+    if already_downloaded_path:
+        from_path = already_downloaded_path
+    else:
+        from_path = link.file_path
+
+    # If --require-hashes is off, `hashes` is either empty, the
+    # link's embedded hash, or MissingHashes; it is required to
+    # match. If --require-hashes is on, we are satisfied by any
+    # hash in `hashes` matching: a URL-based or an option-based
+    # one; no internet-sourced hash will be in `hashes`.
+    if hashes:
+        hashes.check_against_path(from_path)
+
+    content_type = mimetypes.guess_type(from_path)[0]
+
+    return File(from_path, content_type)
+
+
+def unpack_url(
+    link,  # type: Link
+    location,  # type: str
+    downloader,  # type: Downloader
+    download_dir=None,  # type: Optional[str]
+    hashes=None,  # type: Optional[Hashes]
+):
+    # type: (...) -> Optional[File]
+    """Unpack link into location, downloading if required.
+
+    :param hashes: A Hashes object, one of whose embedded hashes must match,
+        or HashMismatch will be raised. If the Hashes is empty, no matches are
+        required, and unhashable types of requirements (like VCS ones, which
+        would ordinarily raise HashUnsupported) are allowed.
+    """
+    # non-editable vcs urls
+    if link.is_vcs:
+        unpack_vcs_link(link, location)
+        return None
+
+    # If it's a url to a local directory
+    if link.is_existing_dir():
+        if os.path.isdir(location):
+            rmtree(location)
+        _copy_source_tree(link.file_path, location)
+        return None
+
+    # file urls
+    if link.is_file:
+        file = get_file_url(link, download_dir, hashes=hashes)
+
+    # http urls
+    else:
+        file = get_http_url(
+            link,
+            downloader,
+            download_dir,
+            hashes=hashes,
+        )
+
+    # unpack the archive to the build dir location. even when only downloading
+    # archives, they have to be unpacked to parse dependencies, except wheels
+    if not link.is_wheel:
+        unpack_file(file.path, location, file.content_type)
+
+    return file
+
+
+def _download_http_url(
+    link,  # type: Link
+    downloader,  # type: Downloader
+    temp_dir,  # type: str
+    hashes,  # type: Optional[Hashes]
+):
+    # type: (...) -> Tuple[str, str]
+    """Download link url into temp_dir using provided session"""
+    download = downloader(link)
+
+    file_path = os.path.join(temp_dir, download.filename)
+    with open(file_path, 'wb') as content_file:
+        for chunk in download.chunks:
+            content_file.write(chunk)
+
+    if hashes:
+        hashes.check_against_path(file_path)
+
+    return file_path, download.response.headers.get('content-type', '')
+
+
+def _check_download_dir(link, download_dir, hashes):
+    # type: (Link, str, Optional[Hashes]) -> Optional[str]
+    """ Check download_dir for previously downloaded file with correct hash
+        If a correct file is found return its path else None
+    """
+    download_path = os.path.join(download_dir, link.filename)
+
+    if not os.path.exists(download_path):
+        return None
+
+    # If already downloaded, does its hash match?
+    logger.info('File was already downloaded %s', download_path)
+    if hashes:
+        try:
+            hashes.check_against_path(download_path)
+        except HashMismatch:
+            logger.warning(
+                'Previously-downloaded file %s has bad hash. '
+                'Re-downloading.',
+                download_path
+            )
+            os.unlink(download_path)
+            return None
+    return download_path
+
+
+class RequirementPreparer(object):
+    """Prepares a Requirement
+    """
+
+    def __init__(
+        self,
+        build_dir,  # type: str
+        download_dir,  # type: Optional[str]
+        src_dir,  # type: str
+        wheel_download_dir,  # type: Optional[str]
+        build_isolation,  # type: bool
+        req_tracker,  # type: RequirementTracker
+        downloader,  # type: Downloader
+        finder,  # type: PackageFinder
+        require_hashes,  # type: bool
+        use_user_site,  # type: bool
+    ):
+        # type: (...) -> None
+        super(RequirementPreparer, self).__init__()
+
+        self.src_dir = src_dir
+        self.build_dir = build_dir
+        self.req_tracker = req_tracker
+        self.downloader = downloader
+        self.finder = finder
+
+        # Where still-packed archives should be written to. If None, they are
+        # not saved, and are deleted immediately after unpacking.
+        self.download_dir = download_dir
+
+        # Where still-packed .whl files should be written to. If None, they are
+        # written to the download_dir parameter. Separate to download_dir to
+        # permit only keeping wheel archives for pip wheel.
+        self.wheel_download_dir = wheel_download_dir
+
+        # NOTE
+        # download_dir and wheel_download_dir overlap semantically and may
+        # be combined if we're willing to have non-wheel archives present in
+        # the wheelhouse output by 'pip wheel'.
+
+        # Is build isolation allowed?
+        self.build_isolation = build_isolation
+
+        # Should hash-checking be required?
+        self.require_hashes = require_hashes
+
+        # Should install in user site-packages?
+        self.use_user_site = use_user_site
+
+    @property
+    def _download_should_save(self):
+        # type: () -> bool
+        if not self.download_dir:
+            return False
+
+        if os.path.exists(self.download_dir):
+            return True
+
+        logger.critical('Could not find download directory')
+        raise InstallationError(
+            "Could not find or access download directory '{}'"
+            .format(self.download_dir))
+
+    def _log_preparing_link(self, req):
+        # type: (InstallRequirement) -> None
+        """Log the way the link prepared."""
+        if req.link.is_file:
+            path = req.link.file_path
+            logger.info('Processing %s', display_path(path))
+        else:
+            logger.info('Collecting %s', req.req or req)
+
+    def _ensure_link_req_src_dir(self, req, download_dir, parallel_builds):
+        # type: (InstallRequirement, Optional[str], bool) -> None
+        """Ensure source_dir of a linked InstallRequirement."""
+        # Since source_dir is only set for editable requirements.
+        if req.link.is_wheel:
+            # We don't need to unpack wheels, so no need for a source
+            # directory.
+            return
+        assert req.source_dir is None
+        # We always delete unpacked sdists after pip runs.
+        req.ensure_has_source_dir(
+            self.build_dir,
+            autodelete=True,
+            parallel_builds=parallel_builds,
+        )
+
+        # If a checkout exists, it's unwise to keep going.  version
+        # inconsistencies are logged later, but do not fail the
+        # installation.
+        # FIXME: this won't upgrade when there's an existing
+        # package unpacked in `req.source_dir`
+        if os.path.exists(os.path.join(req.source_dir, 'setup.py')):
+            raise PreviousBuildDirError(
+                "pip can't proceed with requirements '{}' due to a"
+                "pre-existing build directory ({}). This is likely "
+                "due to a previous installation that failed . pip is "
+                "being responsible and not assuming it can delete this. "
+                "Please delete it and try again.".format(req, req.source_dir)
+            )
+
+    def _get_linked_req_hashes(self, req):
+        # type: (InstallRequirement) -> Hashes
+        # By the time this is called, the requirement's link should have
+        # been checked so we can tell what kind of requirements req is
+        # and raise some more informative errors than otherwise.
+        # (For example, we can raise VcsHashUnsupported for a VCS URL
+        # rather than HashMissing.)
+        if not self.require_hashes:
+            return req.hashes(trust_internet=True)
+
+        # We could check these first 2 conditions inside unpack_url
+        # and save repetition of conditions, but then we would
+        # report less-useful error messages for unhashable
+        # requirements, complaining that there's no hash provided.
+        if req.link.is_vcs:
+            raise VcsHashUnsupported()
+        if req.link.is_existing_dir():
+            raise DirectoryUrlHashUnsupported()
+
+        # Unpinned packages are asking for trouble when a new version
+        # is uploaded.  This isn't a security check, but it saves users
+        # a surprising hash mismatch in the future.
+        # file:/// URLs aren't pinnable, so don't complain about them
+        # not being pinned.
+        if req.original_link is None and not req.is_pinned:
+            raise HashUnpinned()
+
+        # If known-good hashes are missing for this requirement,
+        # shim it with a facade object that will provoke hash
+        # computation and then raise a HashMissing exception
+        # showing the user what the hash should be.
+        return req.hashes(trust_internet=False) or MissingHashes()
+
+    def prepare_linked_requirement(self, req, parallel_builds=False):
+        # type: (InstallRequirement, bool) -> AbstractDistribution
+        """Prepare a requirement to be obtained from req.link."""
+        assert req.link
+        link = req.link
+        self._log_preparing_link(req)
+        if link.is_wheel and self.wheel_download_dir:
+            # Download wheels to a dedicated dir when doing `pip wheel`.
+            download_dir = self.wheel_download_dir
+        else:
+            download_dir = self.download_dir
+
+        with indent_log():
+            self._ensure_link_req_src_dir(req, download_dir, parallel_builds)
+            try:
+                local_file = unpack_url(
+                    link, req.source_dir, self.downloader, download_dir,
+                    hashes=self._get_linked_req_hashes(req)
+                )
+            except NetworkConnectionError as exc:
+                raise InstallationError(
+                    'Could not install requirement {} because of HTTP '
+                    'error {} for URL {}'.format(req, exc, link)
+                )
+
+            # For use in later processing, preserve the file path on the
+            # requirement.
+            if local_file:
+                req.local_file_path = local_file.path
+
+            abstract_dist = _get_prepared_distribution(
+                req, self.req_tracker, self.finder, self.build_isolation,
+            )
+
+            if download_dir:
+                if link.is_existing_dir():
+                    logger.info('Link is a directory, ignoring download_dir')
+                elif local_file:
+                    download_location = os.path.join(
+                        download_dir, link.filename
+                    )
+                    if not os.path.exists(download_location):
+                        shutil.copy(local_file.path, download_location)
+                        download_path = display_path(download_location)
+                        logger.info('Saved %s', download_path)
+
+            if self._download_should_save:
+                # Make a .zip of the source_dir we already created.
+                if link.is_vcs:
+                    req.archive(self.download_dir)
+        return abstract_dist
+
+    def prepare_editable_requirement(
+        self,
+        req,  # type: InstallRequirement
+    ):
+        # type: (...) -> AbstractDistribution
+        """Prepare an editable requirement
+        """
+        assert req.editable, "cannot prepare a non-editable req as editable"
+
+        logger.info('Obtaining %s', req)
+
+        with indent_log():
+            if self.require_hashes:
+                raise InstallationError(
+                    'The editable requirement {} cannot be installed when '
+                    'requiring hashes, because there is no single file to '
+                    'hash.'.format(req)
+                )
+            req.ensure_has_source_dir(self.src_dir)
+            req.update_editable(not self._download_should_save)
+
+            abstract_dist = _get_prepared_distribution(
+                req, self.req_tracker, self.finder, self.build_isolation,
+            )
+
+            if self._download_should_save:
+                req.archive(self.download_dir)
+            req.check_if_exists(self.use_user_site)
+
+        return abstract_dist
+
+    def prepare_installed_requirement(
+        self,
+        req,  # type: InstallRequirement
+        skip_reason  # type: str
+    ):
+        # type: (...) -> AbstractDistribution
+        """Prepare an already-installed requirement
+        """
+        assert req.satisfied_by, "req should have been satisfied but isn't"
+        assert skip_reason is not None, (
+            "did not get skip reason skipped but req.satisfied_by "
+            "is set to {}".format(req.satisfied_by)
+        )
+        logger.info(
+            'Requirement %s: %s (%s)',
+            skip_reason, req, req.satisfied_by.version
+        )
+        with indent_log():
+            if self.require_hashes:
+                logger.debug(
+                    'Since it is already installed, we are trusting this '
+                    'package without checking its hash. To ensure a '
+                    'completely repeatable environment, install into an '
+                    'empty virtualenv.'
+                )
+            abstract_dist = InstalledDistribution(req)
+
+        return abstract_dist
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/pyproject.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/pyproject.py
new file mode 100644
index 0000000..6b4faf7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/pyproject.py
@@ -0,0 +1,196 @@
+from __future__ import absolute_import
+
+import io
+import os
+import sys
+from collections import namedtuple
+
+from pip._vendor import six, toml
+from pip._vendor.packaging.requirements import InvalidRequirement, Requirement
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Optional, List
+
+
+def _is_list_of_str(obj):
+    # type: (Any) -> bool
+    return (
+        isinstance(obj, list) and
+        all(isinstance(item, six.string_types) for item in obj)
+    )
+
+
+def make_pyproject_path(unpacked_source_directory):
+    # type: (str) -> str
+    path = os.path.join(unpacked_source_directory, 'pyproject.toml')
+
+    # Python2 __file__ should not be unicode
+    if six.PY2 and isinstance(path, six.text_type):
+        path = path.encode(sys.getfilesystemencoding())
+
+    return path
+
+
+BuildSystemDetails = namedtuple('BuildSystemDetails', [
+    'requires', 'backend', 'check', 'backend_path'
+])
+
+
+def load_pyproject_toml(
+    use_pep517,  # type: Optional[bool]
+    pyproject_toml,  # type: str
+    setup_py,  # type: str
+    req_name  # type: str
+):
+    # type: (...) -> Optional[BuildSystemDetails]
+    """Load the pyproject.toml file.
+
+    Parameters:
+        use_pep517 - Has the user requested PEP 517 processing? None
+                     means the user hasn't explicitly specified.
+        pyproject_toml - Location of the project's pyproject.toml file
+        setup_py - Location of the project's setup.py file
+        req_name - The name of the requirement we're processing (for
+                   error reporting)
+
+    Returns:
+        None if we should use the legacy code path, otherwise a tuple
+        (
+            requirements from pyproject.toml,
+            name of PEP 517 backend,
+            requirements we should check are installed after setting
+                up the build environment
+            directory paths to import the backend from (backend-path),
+                relative to the project root.
+        )
+    """
+    has_pyproject = os.path.isfile(pyproject_toml)
+    has_setup = os.path.isfile(setup_py)
+
+    if has_pyproject:
+        with io.open(pyproject_toml, encoding="utf-8") as f:
+            pp_toml = toml.load(f)
+        build_system = pp_toml.get("build-system")
+    else:
+        build_system = None
+
+    # The following cases must use PEP 517
+    # We check for use_pep517 being non-None and falsey because that means
+    # the user explicitly requested --no-use-pep517.  The value 0 as
+    # opposed to False can occur when the value is provided via an
+    # environment variable or config file option (due to the quirk of
+    # strtobool() returning an integer in pip's configuration code).
+    if has_pyproject and not has_setup:
+        if use_pep517 is not None and not use_pep517:
+            raise InstallationError(
+                "Disabling PEP 517 processing is invalid: "
+                "project does not have a setup.py"
+            )
+        use_pep517 = True
+    elif build_system and "build-backend" in build_system:
+        if use_pep517 is not None and not use_pep517:
+            raise InstallationError(
+                "Disabling PEP 517 processing is invalid: "
+                "project specifies a build backend of {} "
+                "in pyproject.toml".format(
+                    build_system["build-backend"]
+                )
+            )
+        use_pep517 = True
+
+    # If we haven't worked out whether to use PEP 517 yet,
+    # and the user hasn't explicitly stated a preference,
+    # we do so if the project has a pyproject.toml file.
+    elif use_pep517 is None:
+        use_pep517 = has_pyproject
+
+    # At this point, we know whether we're going to use PEP 517.
+    assert use_pep517 is not None
+
+    # If we're using the legacy code path, there is nothing further
+    # for us to do here.
+    if not use_pep517:
+        return None
+
+    if build_system is None:
+        # Either the user has a pyproject.toml with no build-system
+        # section, or the user has no pyproject.toml, but has opted in
+        # explicitly via --use-pep517.
+        # In the absence of any explicit backend specification, we
+        # assume the setuptools backend that most closely emulates the
+        # traditional direct setup.py execution, and require wheel and
+        # a version of setuptools that supports that backend.
+
+        build_system = {
+            "requires": ["setuptools>=40.8.0", "wheel"],
+            "build-backend": "setuptools.build_meta:__legacy__",
+        }
+
+    # If we're using PEP 517, we have build system information (either
+    # from pyproject.toml, or defaulted by the code above).
+    # Note that at this point, we do not know if the user has actually
+    # specified a backend, though.
+    assert build_system is not None
+
+    # Ensure that the build-system section in pyproject.toml conforms
+    # to PEP 518.
+    error_template = (
+        "{package} has a pyproject.toml file that does not comply "
+        "with PEP 518: {reason}"
+    )
+
+    # Specifying the build-system table but not the requires key is invalid
+    if "requires" not in build_system:
+        raise InstallationError(
+            error_template.format(package=req_name, reason=(
+                "it has a 'build-system' table but not "
+                "'build-system.requires' which is mandatory in the table"
+            ))
+        )
+
+    # Error out if requires is not a list of strings
+    requires = build_system["requires"]
+    if not _is_list_of_str(requires):
+        raise InstallationError(error_template.format(
+            package=req_name,
+            reason="'build-system.requires' is not a list of strings.",
+        ))
+
+    # Each requirement must be valid as per PEP 508
+    for requirement in requires:
+        try:
+            Requirement(requirement)
+        except InvalidRequirement:
+            raise InstallationError(
+                error_template.format(
+                    package=req_name,
+                    reason=(
+                        "'build-system.requires' contains an invalid "
+                        "requirement: {!r}".format(requirement)
+                    ),
+                )
+            )
+
+    backend = build_system.get("build-backend")
+    backend_path = build_system.get("backend-path", [])
+    check = []  # type: List[str]
+    if backend is None:
+        # If the user didn't specify a backend, we assume they want to use
+        # the setuptools backend. But we can't be sure they have included
+        # a version of setuptools which supplies the backend, or wheel
+        # (which is needed by the backend) in their requirements. So we
+        # make a note to check that those requirements are present once
+        # we have set up the environment.
+        # This is quite a lot of work to check for a very specific case. But
+        # the problem is, that case is potentially quite common - projects that
+        # adopted PEP 518 early for the ability to specify requirements to
+        # execute setup.py, but never considered needing to mention the build
+        # tools themselves. The original PEP 518 code had a similar check (but
+        # implemented in a different way).
+        backend = "setuptools.build_meta:__legacy__"
+        check = ["setuptools>=40.8.0", "wheel"]
+
+    return BuildSystemDetails(requires, backend, check, backend_path)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/__init__.py
new file mode 100644
index 0000000..8568d3f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/__init__.py
@@ -0,0 +1,103 @@
+from __future__ import absolute_import
+
+import collections
+import logging
+
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+from .req_file import parse_requirements
+from .req_install import InstallRequirement
+from .req_set import RequirementSet
+
+if MYPY_CHECK_RUNNING:
+    from typing import Iterator, List, Optional, Sequence, Tuple
+
+__all__ = [
+    "RequirementSet", "InstallRequirement",
+    "parse_requirements", "install_given_reqs",
+]
+
+logger = logging.getLogger(__name__)
+
+
+class InstallationResult(object):
+    def __init__(self, name):
+        # type: (str) -> None
+        self.name = name
+
+    def __repr__(self):
+        # type: () -> str
+        return "InstallationResult(name={!r})".format(self.name)
+
+
+def _validate_requirements(
+    requirements,  # type: List[InstallRequirement]
+):
+    # type: (...) -> Iterator[Tuple[str, InstallRequirement]]
+    for req in requirements:
+        assert req.name, "invalid to-be-installed requirement: {}".format(req)
+        yield req.name, req
+
+
+def install_given_reqs(
+    requirements,  # type: List[InstallRequirement]
+    install_options,  # type: List[str]
+    global_options,  # type: Sequence[str]
+    root,  # type: Optional[str]
+    home,  # type: Optional[str]
+    prefix,  # type: Optional[str]
+    warn_script_location,  # type: bool
+    use_user_site,  # type: bool
+    pycompile,  # type: bool
+):
+    # type: (...) -> List[InstallationResult]
+    """
+    Install everything in the given list.
+
+    (to be called after having downloaded and unpacked the packages)
+    """
+    to_install = collections.OrderedDict(_validate_requirements(requirements))
+
+    if to_install:
+        logger.info(
+            'Installing collected packages: %s',
+            ', '.join(to_install.keys()),
+        )
+
+    installed = []
+
+    with indent_log():
+        for req_name, requirement in to_install.items():
+            if requirement.should_reinstall:
+                logger.info('Attempting uninstall: %s', req_name)
+                with indent_log():
+                    uninstalled_pathset = requirement.uninstall(
+                        auto_confirm=True
+                    )
+            else:
+                uninstalled_pathset = None
+
+            try:
+                requirement.install(
+                    install_options,
+                    global_options,
+                    root=root,
+                    home=home,
+                    prefix=prefix,
+                    warn_script_location=warn_script_location,
+                    use_user_site=use_user_site,
+                    pycompile=pycompile,
+                )
+            except Exception:
+                # if install did not succeed, rollback previous uninstall
+                if uninstalled_pathset and not requirement.install_succeeded:
+                    uninstalled_pathset.rollback()
+                raise
+            else:
+                if uninstalled_pathset and requirement.install_succeeded:
+                    uninstalled_pathset.commit()
+
+            installed.append(InstallationResult(req_name))
+
+    return installed
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/constructors.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/constructors.py
new file mode 100644
index 0000000..7a4641e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/constructors.py
@@ -0,0 +1,486 @@
+"""Backing implementation for InstallRequirement's various constructors
+
+The idea here is that these formed a major chunk of InstallRequirement's size
+so, moving them and support code dedicated to them outside of that class
+helps creates for better understandability for the rest of the code.
+
+These are meant to be used elsewhere within pip to create instances of
+InstallRequirement.
+"""
+
+import logging
+import os
+import re
+
+from pip._vendor.packaging.markers import Marker
+from pip._vendor.packaging.requirements import InvalidRequirement, Requirement
+from pip._vendor.packaging.specifiers import Specifier
+from pip._vendor.pkg_resources import RequirementParseError, parse_requirements
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.models.index import PyPI, TestPyPI
+from pip._internal.models.link import Link
+from pip._internal.models.wheel import Wheel
+from pip._internal.pyproject import make_pyproject_path
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.deprecation import deprecated
+from pip._internal.utils.filetypes import ARCHIVE_EXTENSIONS
+from pip._internal.utils.misc import is_installable_dir, splitext
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.urls import path_to_url
+from pip._internal.vcs import is_url, vcs
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Dict, Optional, Set, Tuple, Union,
+    )
+    from pip._internal.req.req_file import ParsedRequirement
+
+
+__all__ = [
+    "install_req_from_editable", "install_req_from_line",
+    "parse_editable"
+]
+
+logger = logging.getLogger(__name__)
+operators = Specifier._operators.keys()
+
+
+def is_archive_file(name):
+    # type: (str) -> bool
+    """Return True if `name` is a considered as an archive file."""
+    ext = splitext(name)[1].lower()
+    if ext in ARCHIVE_EXTENSIONS:
+        return True
+    return False
+
+
+def _strip_extras(path):
+    # type: (str) -> Tuple[str, Optional[str]]
+    m = re.match(r'^(.+)(\[[^\]]+\])$', path)
+    extras = None
+    if m:
+        path_no_extras = m.group(1)
+        extras = m.group(2)
+    else:
+        path_no_extras = path
+
+    return path_no_extras, extras
+
+
+def convert_extras(extras):
+    # type: (Optional[str]) -> Set[str]
+    if not extras:
+        return set()
+    return Requirement("placeholder" + extras.lower()).extras
+
+
+def parse_editable(editable_req):
+    # type: (str) -> Tuple[Optional[str], str, Set[str]]
+    """Parses an editable requirement into:
+        - a requirement name
+        - an URL
+        - extras
+        - editable options
+    Accepted requirements:
+        svn+http://blahblah@rev#egg=Foobar[baz]&subdirectory=version_subdir
+        .[some_extra]
+    """
+
+    url = editable_req
+
+    # If a file path is specified with extras, strip off the extras.
+    url_no_extras, extras = _strip_extras(url)
+
+    if os.path.isdir(url_no_extras):
+        if not os.path.exists(os.path.join(url_no_extras, 'setup.py')):
+            msg = (
+                'File "setup.py" not found. Directory cannot be installed '
+                'in editable mode: {}'.format(os.path.abspath(url_no_extras))
+            )
+            pyproject_path = make_pyproject_path(url_no_extras)
+            if os.path.isfile(pyproject_path):
+                msg += (
+                    '\n(A "pyproject.toml" file was found, but editable '
+                    'mode currently requires a setup.py based build.)'
+                )
+            raise InstallationError(msg)
+
+        # Treating it as code that has already been checked out
+        url_no_extras = path_to_url(url_no_extras)
+
+    if url_no_extras.lower().startswith('file:'):
+        package_name = Link(url_no_extras).egg_fragment
+        if extras:
+            return (
+                package_name,
+                url_no_extras,
+                Requirement("placeholder" + extras.lower()).extras,
+            )
+        else:
+            return package_name, url_no_extras, set()
+
+    for version_control in vcs:
+        if url.lower().startswith('{}:'.format(version_control)):
+            url = '{}+{}'.format(version_control, url)
+            break
+
+    if '+' not in url:
+        raise InstallationError(
+            '{} is not a valid editable requirement. '
+            'It should either be a path to a local project or a VCS URL '
+            '(beginning with svn+, git+, hg+, or bzr+).'.format(editable_req)
+        )
+
+    vc_type = url.split('+', 1)[0].lower()
+
+    if not vcs.get_backend(vc_type):
+        backends = ", ".join([bends.name + '+URL' for bends in vcs.backends])
+        error_message = "For --editable={}, " \
+                        "only {} are currently supported".format(
+                            editable_req, backends)
+        raise InstallationError(error_message)
+
+    package_name = Link(url).egg_fragment
+    if not package_name:
+        raise InstallationError(
+            "Could not detect requirement name for '{}', please specify one "
+            "with #egg=your_package_name".format(editable_req)
+        )
+    return package_name, url, set()
+
+
+def deduce_helpful_msg(req):
+    # type: (str) -> str
+    """Returns helpful msg in case requirements file does not exist,
+    or cannot be parsed.
+
+    :params req: Requirements file path
+    """
+    msg = ""
+    if os.path.exists(req):
+        msg = " It does exist."
+        # Try to parse and check if it is a requirements file.
+        try:
+            with open(req, 'r') as fp:
+                # parse first line only
+                next(parse_requirements(fp.read()))
+                msg += (
+                    "The argument you provided "
+                    "({}) appears to be a"
+                    " requirements file. If that is the"
+                    " case, use the '-r' flag to install"
+                    " the packages specified within it."
+                ).format(req)
+        except RequirementParseError:
+            logger.debug(
+                "Cannot parse '%s' as requirements file", req, exc_info=True
+            )
+    else:
+        msg += " File '{}' does not exist.".format(req)
+    return msg
+
+
+class RequirementParts(object):
+    def __init__(
+            self,
+            requirement,  # type: Optional[Requirement]
+            link,         # type: Optional[Link]
+            markers,      # type: Optional[Marker]
+            extras,       # type: Set[str]
+    ):
+        self.requirement = requirement
+        self.link = link
+        self.markers = markers
+        self.extras = extras
+
+
+def parse_req_from_editable(editable_req):
+    # type: (str) -> RequirementParts
+    name, url, extras_override = parse_editable(editable_req)
+
+    if name is not None:
+        try:
+            req = Requirement(name)
+        except InvalidRequirement:
+            raise InstallationError("Invalid requirement: '{}'".format(name))
+    else:
+        req = None
+
+    link = Link(url)
+
+    return RequirementParts(req, link, None, extras_override)
+
+
+# ---- The actual constructors follow ----
+
+
+def install_req_from_editable(
+    editable_req,  # type: str
+    comes_from=None,  # type: Optional[Union[InstallRequirement, str]]
+    use_pep517=None,  # type: Optional[bool]
+    isolated=False,  # type: bool
+    options=None,  # type: Optional[Dict[str, Any]]
+    constraint=False,  # type: bool
+    user_supplied=False,  # type: bool
+):
+    # type: (...) -> InstallRequirement
+
+    parts = parse_req_from_editable(editable_req)
+
+    return InstallRequirement(
+        parts.requirement,
+        comes_from=comes_from,
+        user_supplied=user_supplied,
+        editable=True,
+        link=parts.link,
+        constraint=constraint,
+        use_pep517=use_pep517,
+        isolated=isolated,
+        install_options=options.get("install_options", []) if options else [],
+        global_options=options.get("global_options", []) if options else [],
+        hash_options=options.get("hashes", {}) if options else {},
+        extras=parts.extras,
+    )
+
+
+def _looks_like_path(name):
+    # type: (str) -> bool
+    """Checks whether the string "looks like" a path on the filesystem.
+
+    This does not check whether the target actually exists, only judge from the
+    appearance.
+
+    Returns true if any of the following conditions is true:
+    * a path separator is found (either os.path.sep or os.path.altsep);
+    * a dot is found (which represents the current directory).
+    """
+    if os.path.sep in name:
+        return True
+    if os.path.altsep is not None and os.path.altsep in name:
+        return True
+    if name.startswith("."):
+        return True
+    return False
+
+
+def _get_url_from_path(path, name):
+    # type: (str, str) -> Optional[str]
+    """
+    First, it checks whether a provided path is an installable directory
+    (e.g. it has a setup.py). If it is, returns the path.
+
+    If false, check if the path is an archive file (such as a .whl).
+    The function checks if the path is a file. If false, if the path has
+    an @, it will treat it as a PEP 440 URL requirement and return the path.
+    """
+    if _looks_like_path(name) and os.path.isdir(path):
+        if is_installable_dir(path):
+            return path_to_url(path)
+        raise InstallationError(
+            "Directory {name!r} is not installable. Neither 'setup.py' "
+            "nor 'pyproject.toml' found.".format(**locals())
+        )
+    if not is_archive_file(path):
+        return None
+    if os.path.isfile(path):
+        return path_to_url(path)
+    urlreq_parts = name.split('@', 1)
+    if len(urlreq_parts) >= 2 and not _looks_like_path(urlreq_parts[0]):
+        # If the path contains '@' and the part before it does not look
+        # like a path, try to treat it as a PEP 440 URL req instead.
+        return None
+    logger.warning(
+        'Requirement %r looks like a filename, but the '
+        'file does not exist',
+        name
+    )
+    return path_to_url(path)
+
+
+def parse_req_from_line(name, line_source):
+    # type: (str, Optional[str]) -> RequirementParts
+    if is_url(name):
+        marker_sep = '; '
+    else:
+        marker_sep = ';'
+    if marker_sep in name:
+        name, markers_as_string = name.split(marker_sep, 1)
+        markers_as_string = markers_as_string.strip()
+        if not markers_as_string:
+            markers = None
+        else:
+            markers = Marker(markers_as_string)
+    else:
+        markers = None
+    name = name.strip()
+    req_as_string = None
+    path = os.path.normpath(os.path.abspath(name))
+    link = None
+    extras_as_string = None
+
+    if is_url(name):
+        link = Link(name)
+    else:
+        p, extras_as_string = _strip_extras(path)
+        url = _get_url_from_path(p, name)
+        if url is not None:
+            link = Link(url)
+
+    # it's a local file, dir, or url
+    if link:
+        # Handle relative file URLs
+        if link.scheme == 'file' and re.search(r'\.\./', link.url):
+            link = Link(
+                path_to_url(os.path.normpath(os.path.abspath(link.path))))
+        # wheel file
+        if link.is_wheel:
+            wheel = Wheel(link.filename)  # can raise InvalidWheelFilename
+            req_as_string = "{wheel.name}=={wheel.version}".format(**locals())
+        else:
+            # set the req to the egg fragment.  when it's not there, this
+            # will become an 'unnamed' requirement
+            req_as_string = link.egg_fragment
+
+    # a requirement specifier
+    else:
+        req_as_string = name
+
+    extras = convert_extras(extras_as_string)
+
+    def with_source(text):
+        # type: (str) -> str
+        if not line_source:
+            return text
+        return '{} (from {})'.format(text, line_source)
+
+    if req_as_string is not None:
+        try:
+            req = Requirement(req_as_string)
+        except InvalidRequirement:
+            if os.path.sep in req_as_string:
+                add_msg = "It looks like a path."
+                add_msg += deduce_helpful_msg(req_as_string)
+            elif ('=' in req_as_string and
+                  not any(op in req_as_string for op in operators)):
+                add_msg = "= is not a valid operator. Did you mean == ?"
+            else:
+                add_msg = ''
+            msg = with_source(
+                'Invalid requirement: {!r}'.format(req_as_string)
+            )
+            if add_msg:
+                msg += '\nHint: {}'.format(add_msg)
+            raise InstallationError(msg)
+        else:
+            # Deprecate extras after specifiers: "name>=1.0[extras]"
+            # This currently works by accident because _strip_extras() parses
+            # any extras in the end of the string and those are saved in
+            # RequirementParts
+            for spec in req.specifier:
+                spec_str = str(spec)
+                if spec_str.endswith(']'):
+                    msg = "Extras after version '{}'.".format(spec_str)
+                    replace = "moving the extras before version specifiers"
+                    deprecated(msg, replacement=replace, gone_in="21.0")
+    else:
+        req = None
+
+    return RequirementParts(req, link, markers, extras)
+
+
+def install_req_from_line(
+    name,  # type: str
+    comes_from=None,  # type: Optional[Union[str, InstallRequirement]]
+    use_pep517=None,  # type: Optional[bool]
+    isolated=False,  # type: bool
+    options=None,  # type: Optional[Dict[str, Any]]
+    constraint=False,  # type: bool
+    line_source=None,  # type: Optional[str]
+    user_supplied=False,  # type: bool
+):
+    # type: (...) -> InstallRequirement
+    """Creates an InstallRequirement from a name, which might be a
+    requirement, directory containing 'setup.py', filename, or URL.
+
+    :param line_source: An optional string describing where the line is from,
+        for logging purposes in case of an error.
+    """
+    parts = parse_req_from_line(name, line_source)
+
+    return InstallRequirement(
+        parts.requirement, comes_from, link=parts.link, markers=parts.markers,
+        use_pep517=use_pep517, isolated=isolated,
+        install_options=options.get("install_options", []) if options else [],
+        global_options=options.get("global_options", []) if options else [],
+        hash_options=options.get("hashes", {}) if options else {},
+        constraint=constraint,
+        extras=parts.extras,
+        user_supplied=user_supplied,
+    )
+
+
+def install_req_from_req_string(
+    req_string,  # type: str
+    comes_from=None,  # type: Optional[InstallRequirement]
+    isolated=False,  # type: bool
+    use_pep517=None,  # type: Optional[bool]
+    user_supplied=False,  # type: bool
+):
+    # type: (...) -> InstallRequirement
+    try:
+        req = Requirement(req_string)
+    except InvalidRequirement:
+        raise InstallationError("Invalid requirement: '{}'".format(req_string))
+
+    domains_not_allowed = [
+        PyPI.file_storage_domain,
+        TestPyPI.file_storage_domain,
+    ]
+    if (req.url and comes_from and comes_from.link and
+            comes_from.link.netloc in domains_not_allowed):
+        # Explicitly disallow pypi packages that depend on external urls
+        raise InstallationError(
+            "Packages installed from PyPI cannot depend on packages "
+            "which are not also hosted on PyPI.\n"
+            "{} depends on {} ".format(comes_from.name, req)
+        )
+
+    return InstallRequirement(
+        req,
+        comes_from,
+        isolated=isolated,
+        use_pep517=use_pep517,
+        user_supplied=user_supplied,
+    )
+
+
+def install_req_from_parsed_requirement(
+    parsed_req,  # type: ParsedRequirement
+    isolated=False,  # type: bool
+    use_pep517=None,  # type: Optional[bool]
+    user_supplied=False,  # type: bool
+):
+    # type: (...) -> InstallRequirement
+    if parsed_req.is_editable:
+        req = install_req_from_editable(
+            parsed_req.requirement,
+            comes_from=parsed_req.comes_from,
+            use_pep517=use_pep517,
+            constraint=parsed_req.constraint,
+            isolated=isolated,
+            user_supplied=user_supplied,
+        )
+
+    else:
+        req = install_req_from_line(
+            parsed_req.requirement,
+            comes_from=parsed_req.comes_from,
+            use_pep517=use_pep517,
+            isolated=isolated,
+            options=parsed_req.options,
+            constraint=parsed_req.constraint,
+            line_source=parsed_req.line_source,
+            user_supplied=user_supplied,
+        )
+    return req
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_file.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_file.py
new file mode 100644
index 0000000..1050582
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_file.py
@@ -0,0 +1,592 @@
+"""
+Requirements file parsing
+"""
+
+from __future__ import absolute_import
+
+import optparse
+import os
+import re
+import shlex
+import sys
+
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.cli import cmdoptions
+from pip._internal.exceptions import (
+    InstallationError,
+    RequirementsFileParseError,
+)
+from pip._internal.models.search_scope import SearchScope
+from pip._internal.network.utils import raise_for_status
+from pip._internal.utils.encoding import auto_decode
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.urls import get_url_scheme
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import (
+        Any, Callable, Dict, Iterator, List, NoReturn, Optional, Text, Tuple,
+    )
+
+    from pip._internal.index.package_finder import PackageFinder
+    from pip._internal.network.session import PipSession
+
+    ReqFileLines = Iterator[Tuple[int, Text]]
+
+    LineParser = Callable[[Text], Tuple[str, Values]]
+
+
+__all__ = ['parse_requirements']
+
+SCHEME_RE = re.compile(r'^(http|https|file):', re.I)
+COMMENT_RE = re.compile(r'(^|\s+)#.*$')
+
+# Matches environment variable-style values in '${MY_VARIABLE_1}' with the
+# variable name consisting of only uppercase letters, digits or the '_'
+# (underscore). This follows the POSIX standard defined in IEEE Std 1003.1,
+# 2013 Edition.
+ENV_VAR_RE = re.compile(r'(?P<var>\$\{(?P<name>[A-Z0-9_]+)\})')
+
+SUPPORTED_OPTIONS = [
+    cmdoptions.index_url,
+    cmdoptions.extra_index_url,
+    cmdoptions.no_index,
+    cmdoptions.constraints,
+    cmdoptions.requirements,
+    cmdoptions.editable,
+    cmdoptions.find_links,
+    cmdoptions.no_binary,
+    cmdoptions.only_binary,
+    cmdoptions.prefer_binary,
+    cmdoptions.require_hashes,
+    cmdoptions.pre,
+    cmdoptions.trusted_host,
+    cmdoptions.use_new_feature,
+]  # type: List[Callable[..., optparse.Option]]
+
+# options to be passed to requirements
+SUPPORTED_OPTIONS_REQ = [
+    cmdoptions.install_options,
+    cmdoptions.global_options,
+    cmdoptions.hash,
+]  # type: List[Callable[..., optparse.Option]]
+
+# the 'dest' string values
+SUPPORTED_OPTIONS_REQ_DEST = [str(o().dest) for o in SUPPORTED_OPTIONS_REQ]
+
+
+class ParsedRequirement(object):
+    def __init__(
+        self,
+        requirement,  # type:str
+        is_editable,  # type: bool
+        comes_from,  # type: str
+        constraint,  # type: bool
+        options=None,  # type: Optional[Dict[str, Any]]
+        line_source=None,  # type: Optional[str]
+    ):
+        # type: (...) -> None
+        self.requirement = requirement
+        self.is_editable = is_editable
+        self.comes_from = comes_from
+        self.options = options
+        self.constraint = constraint
+        self.line_source = line_source
+
+
+class ParsedLine(object):
+    def __init__(
+        self,
+        filename,  # type: str
+        lineno,  # type: int
+        comes_from,  # type: Optional[str]
+        args,  # type: str
+        opts,  # type: Values
+        constraint,  # type: bool
+    ):
+        # type: (...) -> None
+        self.filename = filename
+        self.lineno = lineno
+        self.comes_from = comes_from
+        self.opts = opts
+        self.constraint = constraint
+
+        if args:
+            self.is_requirement = True
+            self.is_editable = False
+            self.requirement = args
+        elif opts.editables:
+            self.is_requirement = True
+            self.is_editable = True
+            # We don't support multiple -e on one line
+            self.requirement = opts.editables[0]
+        else:
+            self.is_requirement = False
+
+
+def parse_requirements(
+    filename,  # type: str
+    session,  # type: PipSession
+    finder=None,  # type: Optional[PackageFinder]
+    comes_from=None,  # type: Optional[str]
+    options=None,  # type: Optional[optparse.Values]
+    constraint=False,  # type: bool
+):
+    # type: (...) -> Iterator[ParsedRequirement]
+    """Parse a requirements file and yield ParsedRequirement instances.
+
+    :param filename:    Path or url of requirements file.
+    :param session:     PipSession instance.
+    :param finder:      Instance of pip.index.PackageFinder.
+    :param comes_from:  Origin description of requirements.
+    :param options:     cli options.
+    :param constraint:  If true, parsing a constraint file rather than
+        requirements file.
+    """
+    line_parser = get_line_parser(finder)
+    parser = RequirementsFileParser(session, line_parser, comes_from)
+
+    for parsed_line in parser.parse(filename, constraint):
+        parsed_req = handle_line(
+            parsed_line,
+            options=options,
+            finder=finder,
+            session=session
+        )
+        if parsed_req is not None:
+            yield parsed_req
+
+
+def preprocess(content):
+    # type: (Text) -> ReqFileLines
+    """Split, filter, and join lines, and return a line iterator
+
+    :param content: the content of the requirements file
+    """
+    lines_enum = enumerate(content.splitlines(), start=1)  # type: ReqFileLines
+    lines_enum = join_lines(lines_enum)
+    lines_enum = ignore_comments(lines_enum)
+    lines_enum = expand_env_variables(lines_enum)
+    return lines_enum
+
+
+def handle_requirement_line(
+    line,  # type: ParsedLine
+    options=None,  # type: Optional[optparse.Values]
+):
+    # type: (...) -> ParsedRequirement
+
+    # preserve for the nested code path
+    line_comes_from = '{} {} (line {})'.format(
+        '-c' if line.constraint else '-r', line.filename, line.lineno,
+    )
+
+    assert line.is_requirement
+
+    if line.is_editable:
+        # For editable requirements, we don't support per-requirement
+        # options, so just return the parsed requirement.
+        return ParsedRequirement(
+            requirement=line.requirement,
+            is_editable=line.is_editable,
+            comes_from=line_comes_from,
+            constraint=line.constraint,
+        )
+    else:
+        if options:
+            # Disable wheels if the user has specified build options
+            cmdoptions.check_install_build_global(options, line.opts)
+
+        # get the options that apply to requirements
+        req_options = {}
+        for dest in SUPPORTED_OPTIONS_REQ_DEST:
+            if dest in line.opts.__dict__ and line.opts.__dict__[dest]:
+                req_options[dest] = line.opts.__dict__[dest]
+
+        line_source = 'line {} of {}'.format(line.lineno, line.filename)
+        return ParsedRequirement(
+            requirement=line.requirement,
+            is_editable=line.is_editable,
+            comes_from=line_comes_from,
+            constraint=line.constraint,
+            options=req_options,
+            line_source=line_source,
+        )
+
+
+def handle_option_line(
+    opts,  # type: Values
+    filename,  # type: str
+    lineno,  # type: int
+    finder=None,  # type: Optional[PackageFinder]
+    options=None,  # type: Optional[optparse.Values]
+    session=None,  # type: Optional[PipSession]
+):
+    # type:  (...) -> None
+
+    if options:
+        # percolate options upward
+        if opts.require_hashes:
+            options.require_hashes = opts.require_hashes
+        if opts.features_enabled:
+            options.features_enabled.extend(
+                f for f in opts.features_enabled
+                if f not in options.features_enabled
+            )
+
+    # set finder options
+    if finder:
+        find_links = finder.find_links
+        index_urls = finder.index_urls
+        if opts.index_url:
+            index_urls = [opts.index_url]
+        if opts.no_index is True:
+            index_urls = []
+        if opts.extra_index_urls:
+            index_urls.extend(opts.extra_index_urls)
+        if opts.find_links:
+            # FIXME: it would be nice to keep track of the source
+            # of the find_links: support a find-links local path
+            # relative to a requirements file.
+            value = opts.find_links[0]
+            req_dir = os.path.dirname(os.path.abspath(filename))
+            relative_to_reqs_file = os.path.join(req_dir, value)
+            if os.path.exists(relative_to_reqs_file):
+                value = relative_to_reqs_file
+            find_links.append(value)
+
+        search_scope = SearchScope(
+            find_links=find_links,
+            index_urls=index_urls,
+        )
+        finder.search_scope = search_scope
+
+        if opts.pre:
+            finder.set_allow_all_prereleases()
+
+        if opts.prefer_binary:
+            finder.set_prefer_binary()
+
+        if session:
+            for host in opts.trusted_hosts or []:
+                source = 'line {} of {}'.format(lineno, filename)
+                session.add_trusted_host(host, source=source)
+
+
+def handle_line(
+    line,  # type: ParsedLine
+    options=None,  # type: Optional[optparse.Values]
+    finder=None,  # type: Optional[PackageFinder]
+    session=None,  # type: Optional[PipSession]
+):
+    # type: (...) -> Optional[ParsedRequirement]
+    """Handle a single parsed requirements line; This can result in
+    creating/yielding requirements, or updating the finder.
+
+    :param line:        The parsed line to be processed.
+    :param options:     CLI options.
+    :param finder:      The finder - updated by non-requirement lines.
+    :param session:     The session - updated by non-requirement lines.
+
+    Returns a ParsedRequirement object if the line is a requirement line,
+    otherwise returns None.
+
+    For lines that contain requirements, the only options that have an effect
+    are from SUPPORTED_OPTIONS_REQ, and they are scoped to the
+    requirement. Other options from SUPPORTED_OPTIONS may be present, but are
+    ignored.
+
+    For lines that do not contain requirements, the only options that have an
+    effect are from SUPPORTED_OPTIONS. Options from SUPPORTED_OPTIONS_REQ may
+    be present, but are ignored. These lines may contain multiple options
+    (although our docs imply only one is supported), and all our parsed and
+    affect the finder.
+    """
+
+    if line.is_requirement:
+        parsed_req = handle_requirement_line(line, options)
+        return parsed_req
+    else:
+        handle_option_line(
+            line.opts,
+            line.filename,
+            line.lineno,
+            finder,
+            options,
+            session,
+        )
+        return None
+
+
+class RequirementsFileParser(object):
+    def __init__(
+        self,
+        session,  # type: PipSession
+        line_parser,  # type: LineParser
+        comes_from,  # type: Optional[str]
+    ):
+        # type: (...) -> None
+        self._session = session
+        self._line_parser = line_parser
+        self._comes_from = comes_from
+
+    def parse(self, filename, constraint):
+        # type: (str, bool) -> Iterator[ParsedLine]
+        """Parse a given file, yielding parsed lines.
+        """
+        for line in self._parse_and_recurse(filename, constraint):
+            yield line
+
+    def _parse_and_recurse(self, filename, constraint):
+        # type: (str, bool) -> Iterator[ParsedLine]
+        for line in self._parse_file(filename, constraint):
+            if (
+                not line.is_requirement and
+                (line.opts.requirements or line.opts.constraints)
+            ):
+                # parse a nested requirements file
+                if line.opts.requirements:
+                    req_path = line.opts.requirements[0]
+                    nested_constraint = False
+                else:
+                    req_path = line.opts.constraints[0]
+                    nested_constraint = True
+
+                # original file is over http
+                if SCHEME_RE.search(filename):
+                    # do a url join so relative paths work
+                    req_path = urllib_parse.urljoin(filename, req_path)
+                # original file and nested file are paths
+                elif not SCHEME_RE.search(req_path):
+                    # do a join so relative paths work
+                    req_path = os.path.join(
+                        os.path.dirname(filename), req_path,
+                    )
+
+                for inner_line in self._parse_and_recurse(
+                    req_path, nested_constraint,
+                ):
+                    yield inner_line
+            else:
+                yield line
+
+    def _parse_file(self, filename, constraint):
+        # type: (str, bool) -> Iterator[ParsedLine]
+        _, content = get_file_content(
+            filename, self._session, comes_from=self._comes_from
+        )
+
+        lines_enum = preprocess(content)
+
+        for line_number, line in lines_enum:
+            try:
+                args_str, opts = self._line_parser(line)
+            except OptionParsingError as e:
+                # add offending line
+                msg = 'Invalid requirement: {}\n{}'.format(line, e.msg)
+                raise RequirementsFileParseError(msg)
+
+            yield ParsedLine(
+                filename,
+                line_number,
+                self._comes_from,
+                args_str,
+                opts,
+                constraint,
+            )
+
+
+def get_line_parser(finder):
+    # type: (Optional[PackageFinder]) -> LineParser
+    def parse_line(line):
+        # type: (Text) -> Tuple[str, Values]
+        # Build new parser for each line since it accumulates appendable
+        # options.
+        parser = build_parser()
+        defaults = parser.get_default_values()
+        defaults.index_url = None
+        if finder:
+            defaults.format_control = finder.format_control
+
+        args_str, options_str = break_args_options(line)
+        # Prior to 2.7.3, shlex cannot deal with unicode entries
+        if sys.version_info < (2, 7, 3):
+            # https://github.com/python/mypy/issues/1174
+            options_str = options_str.encode('utf8')  # type: ignore
+
+        # https://github.com/python/mypy/issues/1174
+        opts, _ = parser.parse_args(
+            shlex.split(options_str), defaults)  # type: ignore
+
+        return args_str, opts
+
+    return parse_line
+
+
+def break_args_options(line):
+    # type: (Text) -> Tuple[str, Text]
+    """Break up the line into an args and options string.  We only want to shlex
+    (and then optparse) the options, not the args.  args can contain markers
+    which are corrupted by shlex.
+    """
+    tokens = line.split(' ')
+    args = []
+    options = tokens[:]
+    for token in tokens:
+        if token.startswith('-') or token.startswith('--'):
+            break
+        else:
+            args.append(token)
+            options.pop(0)
+    return ' '.join(args), ' '.join(options)  # type: ignore
+
+
+class OptionParsingError(Exception):
+    def __init__(self, msg):
+        # type: (str) -> None
+        self.msg = msg
+
+
+def build_parser():
+    # type: () -> optparse.OptionParser
+    """
+    Return a parser for parsing requirement lines
+    """
+    parser = optparse.OptionParser(add_help_option=False)
+
+    option_factories = SUPPORTED_OPTIONS + SUPPORTED_OPTIONS_REQ
+    for option_factory in option_factories:
+        option = option_factory()
+        parser.add_option(option)
+
+    # By default optparse sys.exits on parsing errors. We want to wrap
+    # that in our own exception.
+    def parser_exit(self, msg):
+        # type: (Any, str) -> NoReturn
+        raise OptionParsingError(msg)
+    # NOTE: mypy disallows assigning to a method
+    #       https://github.com/python/mypy/issues/2427
+    parser.exit = parser_exit  # type: ignore
+
+    return parser
+
+
+def join_lines(lines_enum):
+    # type: (ReqFileLines) -> ReqFileLines
+    """Joins a line ending in '\' with the previous line (except when following
+    comments).  The joined line takes on the index of the first line.
+    """
+    primary_line_number = None
+    new_line = []  # type: List[Text]
+    for line_number, line in lines_enum:
+        if not line.endswith('\\') or COMMENT_RE.match(line):
+            if COMMENT_RE.match(line):
+                # this ensures comments are always matched later
+                line = ' ' + line
+            if new_line:
+                new_line.append(line)
+                assert primary_line_number is not None
+                yield primary_line_number, ''.join(new_line)
+                new_line = []
+            else:
+                yield line_number, line
+        else:
+            if not new_line:
+                primary_line_number = line_number
+            new_line.append(line.strip('\\'))
+
+    # last line contains \
+    if new_line:
+        assert primary_line_number is not None
+        yield primary_line_number, ''.join(new_line)
+
+    # TODO: handle space after '\'.
+
+
+def ignore_comments(lines_enum):
+    # type: (ReqFileLines) -> ReqFileLines
+    """
+    Strips comments and filter empty lines.
+    """
+    for line_number, line in lines_enum:
+        line = COMMENT_RE.sub('', line)
+        line = line.strip()
+        if line:
+            yield line_number, line
+
+
+def expand_env_variables(lines_enum):
+    # type: (ReqFileLines) -> ReqFileLines
+    """Replace all environment variables that can be retrieved via `os.getenv`.
+
+    The only allowed format for environment variables defined in the
+    requirement file is `${MY_VARIABLE_1}` to ensure two things:
+
+    1. Strings that contain a `$` aren't accidentally (partially) expanded.
+    2. Ensure consistency across platforms for requirement files.
+
+    These points are the result of a discussion on the `github pull
+    request #3514 <https://github.com/pypa/pip/pull/3514>`_.
+
+    Valid characters in variable names follow the `POSIX standard
+    <http://pubs.opengroup.org/onlinepubs/9699919799/>`_ and are limited
+    to uppercase letter, digits and the `_` (underscore).
+    """
+    for line_number, line in lines_enum:
+        for env_var, var_name in ENV_VAR_RE.findall(line):
+            value = os.getenv(var_name)
+            if not value:
+                continue
+
+            line = line.replace(env_var, value)
+
+        yield line_number, line
+
+
+def get_file_content(url, session, comes_from=None):
+    # type: (str, PipSession, Optional[str]) -> Tuple[str, Text]
+    """Gets the content of a file; it may be a filename, file: URL, or
+    http: URL.  Returns (location, content).  Content is unicode.
+    Respects # -*- coding: declarations on the retrieved files.
+
+    :param url:         File path or url.
+    :param session:     PipSession instance.
+    :param comes_from:  Origin description of requirements.
+    """
+    scheme = get_url_scheme(url)
+
+    if scheme in ['http', 'https']:
+        # FIXME: catch some errors
+        resp = session.get(url)
+        raise_for_status(resp)
+        return resp.url, resp.text
+
+    elif scheme == 'file':
+        if comes_from and comes_from.startswith('http'):
+            raise InstallationError(
+                'Requirements file {} references URL {}, '
+                'which is local'.format(comes_from, url)
+            )
+
+        path = url.split(':', 1)[1]
+        path = path.replace('\\', '/')
+        match = _url_slash_drive_re.match(path)
+        if match:
+            path = match.group(1) + ':' + path.split('|', 1)[1]
+        path = urllib_parse.unquote(path)
+        if path.startswith('/'):
+            path = '/' + path.lstrip('/')
+        url = path
+
+    try:
+        with open(url, 'rb') as f:
+            content = auto_decode(f.read())
+    except IOError as exc:
+        raise InstallationError(
+            'Could not open requirements file: {}'.format(exc)
+        )
+    return url, content
+
+
+_url_slash_drive_re = re.compile(r'/*([a-z])\|', re.I)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_install.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_install.py
new file mode 100644
index 0000000..f25cec9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_install.py
@@ -0,0 +1,905 @@
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+from __future__ import absolute_import
+
+import logging
+import os
+import shutil
+import sys
+import uuid
+import zipfile
+
+from pip._vendor import pkg_resources, six
+from pip._vendor.packaging.requirements import Requirement
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.packaging.version import Version
+from pip._vendor.packaging.version import parse as parse_version
+from pip._vendor.pep517.wrappers import Pep517HookCaller
+
+from pip._internal.build_env import NoOpBuildEnvironment
+from pip._internal.exceptions import InstallationError
+from pip._internal.locations import get_scheme
+from pip._internal.models.link import Link
+from pip._internal.operations.build.metadata import generate_metadata
+from pip._internal.operations.build.metadata_legacy import \
+    generate_metadata as generate_metadata_legacy
+from pip._internal.operations.install.editable_legacy import \
+    install_editable as install_editable_legacy
+from pip._internal.operations.install.legacy import LegacyInstallFailure
+from pip._internal.operations.install.legacy import install as install_legacy
+from pip._internal.operations.install.wheel import install_wheel
+from pip._internal.pyproject import load_pyproject_toml, make_pyproject_path
+from pip._internal.req.req_uninstall import UninstallPathSet
+from pip._internal.utils.deprecation import deprecated
+from pip._internal.utils.direct_url_helpers import direct_url_from_link
+from pip._internal.utils.hashes import Hashes
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import (
+    ask_path_exists,
+    backup_dir,
+    display_path,
+    dist_in_site_packages,
+    dist_in_usersite,
+    get_distribution,
+    get_installed_version,
+    hide_url,
+    redact_auth_from_url,
+)
+from pip._internal.utils.packaging import get_metadata
+from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.virtualenv import running_under_virtualenv
+from pip._internal.vcs import vcs
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Dict, Iterable, List, Optional, Sequence, Union,
+    )
+    from pip._internal.build_env import BuildEnvironment
+    from pip._vendor.pkg_resources import Distribution
+    from pip._vendor.packaging.specifiers import SpecifierSet
+    from pip._vendor.packaging.markers import Marker
+
+
+logger = logging.getLogger(__name__)
+
+
+def _get_dist(metadata_directory):
+    # type: (str) -> Distribution
+    """Return a pkg_resources.Distribution for the provided
+    metadata directory.
+    """
+    dist_dir = metadata_directory.rstrip(os.sep)
+
+    # Build a PathMetadata object, from path to metadata. :wink:
+    base_dir, dist_dir_name = os.path.split(dist_dir)
+    metadata = pkg_resources.PathMetadata(base_dir, dist_dir)
+
+    # Determine the correct Distribution object type.
+    if dist_dir.endswith(".egg-info"):
+        dist_cls = pkg_resources.Distribution
+        dist_name = os.path.splitext(dist_dir_name)[0]
+    else:
+        assert dist_dir.endswith(".dist-info")
+        dist_cls = pkg_resources.DistInfoDistribution
+        dist_name = os.path.splitext(dist_dir_name)[0].split("-")[0]
+
+    return dist_cls(
+        base_dir,
+        project_name=dist_name,
+        metadata=metadata,
+    )
+
+
+class InstallRequirement(object):
+    """
+    Represents something that may be installed later on, may have information
+    about where to fetch the relevant requirement and also contains logic for
+    installing the said requirement.
+    """
+
+    def __init__(
+        self,
+        req,  # type: Optional[Requirement]
+        comes_from,  # type: Optional[Union[str, InstallRequirement]]
+        editable=False,  # type: bool
+        link=None,  # type: Optional[Link]
+        markers=None,  # type: Optional[Marker]
+        use_pep517=None,  # type: Optional[bool]
+        isolated=False,  # type: bool
+        install_options=None,  # type: Optional[List[str]]
+        global_options=None,  # type: Optional[List[str]]
+        hash_options=None,  # type: Optional[Dict[str, List[str]]]
+        constraint=False,  # type: bool
+        extras=(),  # type: Iterable[str]
+        user_supplied=False,  # type: bool
+    ):
+        # type: (...) -> None
+        assert req is None or isinstance(req, Requirement), req
+        self.req = req
+        self.comes_from = comes_from
+        self.constraint = constraint
+        self.editable = editable
+        self.legacy_install_reason = None  # type: Optional[int]
+
+        # source_dir is the local directory where the linked requirement is
+        # located, or unpacked. In case unpacking is needed, creating and
+        # populating source_dir is done by the RequirementPreparer. Note this
+        # is not necessarily the directory where pyproject.toml or setup.py is
+        # located - that one is obtained via unpacked_source_directory.
+        self.source_dir = None  # type: Optional[str]
+        if self.editable:
+            assert link
+            if link.is_file:
+                self.source_dir = os.path.normpath(
+                    os.path.abspath(link.file_path)
+                )
+
+        if link is None and req and req.url:
+            # PEP 508 URL requirement
+            link = Link(req.url)
+        self.link = self.original_link = link
+        self.original_link_is_in_wheel_cache = False
+
+        # Path to any downloaded or already-existing package.
+        self.local_file_path = None  # type: Optional[str]
+        if self.link and self.link.is_file:
+            self.local_file_path = self.link.file_path
+
+        if extras:
+            self.extras = extras
+        elif req:
+            self.extras = {
+                pkg_resources.safe_extra(extra) for extra in req.extras
+            }
+        else:
+            self.extras = set()
+        if markers is None and req:
+            markers = req.marker
+        self.markers = markers
+
+        # This holds the pkg_resources.Distribution object if this requirement
+        # is already available:
+        self.satisfied_by = None  # type: Optional[Distribution]
+        # Whether the installation process should try to uninstall an existing
+        # distribution before installing this requirement.
+        self.should_reinstall = False
+        # Temporary build location
+        self._temp_build_dir = None  # type: Optional[TempDirectory]
+        # Set to True after successful installation
+        self.install_succeeded = None  # type: Optional[bool]
+        # Supplied options
+        self.install_options = install_options if install_options else []
+        self.global_options = global_options if global_options else []
+        self.hash_options = hash_options if hash_options else {}
+        # Set to True after successful preparation of this requirement
+        self.prepared = False
+        # User supplied requirement are explicitly requested for installation
+        # by the user via CLI arguments or requirements files, as opposed to,
+        # e.g. dependencies, extras or constraints.
+        self.user_supplied = user_supplied
+
+        # Set by the legacy resolver when the requirement has been downloaded
+        # TODO: This introduces a strong coupling between the resolver and the
+        #       requirement (the coupling was previously between the resolver
+        #       and the requirement set). This should be refactored to allow
+        #       the requirement to decide for itself when it has been
+        #       successfully downloaded - but that is more tricky to get right,
+        #       se we are making the change in stages.
+        self.successfully_downloaded = False
+
+        self.isolated = isolated
+        self.build_env = NoOpBuildEnvironment()  # type: BuildEnvironment
+
+        # For PEP 517, the directory where we request the project metadata
+        # gets stored. We need this to pass to build_wheel, so the backend
+        # can ensure that the wheel matches the metadata (see the PEP for
+        # details).
+        self.metadata_directory = None  # type: Optional[str]
+
+        # The static build requirements (from pyproject.toml)
+        self.pyproject_requires = None  # type: Optional[List[str]]
+
+        # Build requirements that we will check are available
+        self.requirements_to_check = []  # type: List[str]
+
+        # The PEP 517 backend we should use to build the project
+        self.pep517_backend = None  # type: Optional[Pep517HookCaller]
+
+        # Are we using PEP 517 for this requirement?
+        # After pyproject.toml has been loaded, the only valid values are True
+        # and False. Before loading, None is valid (meaning "use the default").
+        # Setting an explicit value before loading pyproject.toml is supported,
+        # but after loading this flag should be treated as read only.
+        self.use_pep517 = use_pep517
+
+    def __str__(self):
+        # type: () -> str
+        if self.req:
+            s = str(self.req)
+            if self.link:
+                s += ' from {}'.format(redact_auth_from_url(self.link.url))
+        elif self.link:
+            s = redact_auth_from_url(self.link.url)
+        else:
+            s = '<InstallRequirement>'
+        if self.satisfied_by is not None:
+            s += ' in {}'.format(display_path(self.satisfied_by.location))
+        if self.comes_from:
+            if isinstance(self.comes_from, six.string_types):
+                comes_from = self.comes_from  # type: Optional[str]
+            else:
+                comes_from = self.comes_from.from_path()
+            if comes_from:
+                s += ' (from {})'.format(comes_from)
+        return s
+
+    def __repr__(self):
+        # type: () -> str
+        return '<{} object: {} editable={!r}>'.format(
+            self.__class__.__name__, str(self), self.editable)
+
+    def format_debug(self):
+        # type: () -> str
+        """An un-tested helper for getting state, for debugging.
+        """
+        attributes = vars(self)
+        names = sorted(attributes)
+
+        state = (
+            "{}={!r}".format(attr, attributes[attr]) for attr in sorted(names)
+        )
+        return '<{name} object: {{{state}}}>'.format(
+            name=self.__class__.__name__,
+            state=", ".join(state),
+        )
+
+    # Things that are valid for all kinds of requirements?
+    @property
+    def name(self):
+        # type: () -> Optional[str]
+        if self.req is None:
+            return None
+        return six.ensure_str(pkg_resources.safe_name(self.req.name))
+
+    @property
+    def specifier(self):
+        # type: () -> SpecifierSet
+        return self.req.specifier
+
+    @property
+    def is_pinned(self):
+        # type: () -> bool
+        """Return whether I am pinned to an exact version.
+
+        For example, some-package==1.2 is pinned; some-package>1.2 is not.
+        """
+        specifiers = self.specifier
+        return (len(specifiers) == 1 and
+                next(iter(specifiers)).operator in {'==', '==='})
+
+    @property
+    def installed_version(self):
+        # type: () -> Optional[str]
+        return get_installed_version(self.name)
+
+    def match_markers(self, extras_requested=None):
+        # type: (Optional[Iterable[str]]) -> bool
+        if not extras_requested:
+            # Provide an extra to safely evaluate the markers
+            # without matching any extra
+            extras_requested = ('',)
+        if self.markers is not None:
+            return any(
+                self.markers.evaluate({'extra': extra})
+                for extra in extras_requested)
+        else:
+            return True
+
+    @property
+    def has_hash_options(self):
+        # type: () -> bool
+        """Return whether any known-good hashes are specified as options.
+
+        These activate --require-hashes mode; hashes specified as part of a
+        URL do not.
+
+        """
+        return bool(self.hash_options)
+
+    def hashes(self, trust_internet=True):
+        # type: (bool) -> Hashes
+        """Return a hash-comparer that considers my option- and URL-based
+        hashes to be known-good.
+
+        Hashes in URLs--ones embedded in the requirements file, not ones
+        downloaded from an index server--are almost peers with ones from
+        flags. They satisfy --require-hashes (whether it was implicitly or
+        explicitly activated) but do not activate it. md5 and sha224 are not
+        allowed in flags, which should nudge people toward good algos. We
+        always OR all hashes together, even ones from URLs.
+
+        :param trust_internet: Whether to trust URL-based (#md5=...) hashes
+            downloaded from the internet, as by populate_link()
+
+        """
+        good_hashes = self.hash_options.copy()
+        link = self.link if trust_internet else self.original_link
+        if link and link.hash:
+            good_hashes.setdefault(link.hash_name, []).append(link.hash)
+        return Hashes(good_hashes)
+
+    def from_path(self):
+        # type: () -> Optional[str]
+        """Format a nice indicator to show where this "comes from"
+        """
+        if self.req is None:
+            return None
+        s = str(self.req)
+        if self.comes_from:
+            if isinstance(self.comes_from, six.string_types):
+                comes_from = self.comes_from
+            else:
+                comes_from = self.comes_from.from_path()
+            if comes_from:
+                s += '->' + comes_from
+        return s
+
+    def ensure_build_location(self, build_dir, autodelete, parallel_builds):
+        # type: (str, bool, bool) -> str
+        assert build_dir is not None
+        if self._temp_build_dir is not None:
+            assert self._temp_build_dir.path
+            return self._temp_build_dir.path
+        if self.req is None:
+            # Some systems have /tmp as a symlink which confuses custom
+            # builds (such as numpy). Thus, we ensure that the real path
+            # is returned.
+            self._temp_build_dir = TempDirectory(
+                kind=tempdir_kinds.REQ_BUILD, globally_managed=True
+            )
+
+            return self._temp_build_dir.path
+
+        # When parallel builds are enabled, add a UUID to the build directory
+        # name so multiple builds do not interfere with each other.
+        dir_name = canonicalize_name(self.name)
+        if parallel_builds:
+            dir_name = "{}_{}".format(dir_name, uuid.uuid4().hex)
+
+        # FIXME: Is there a better place to create the build_dir? (hg and bzr
+        # need this)
+        if not os.path.exists(build_dir):
+            logger.debug('Creating directory %s', build_dir)
+            os.makedirs(build_dir)
+        actual_build_dir = os.path.join(build_dir, dir_name)
+        # `None` indicates that we respect the globally-configured deletion
+        # settings, which is what we actually want when auto-deleting.
+        delete_arg = None if autodelete else False
+        return TempDirectory(
+            path=actual_build_dir,
+            delete=delete_arg,
+            kind=tempdir_kinds.REQ_BUILD,
+            globally_managed=True,
+        ).path
+
+    def _set_requirement(self):
+        # type: () -> None
+        """Set requirement after generating metadata.
+        """
+        assert self.req is None
+        assert self.metadata is not None
+        assert self.source_dir is not None
+
+        # Construct a Requirement object from the generated metadata
+        if isinstance(parse_version(self.metadata["Version"]), Version):
+            op = "=="
+        else:
+            op = "==="
+
+        self.req = Requirement(
+            "".join([
+                self.metadata["Name"],
+                op,
+                self.metadata["Version"],
+            ])
+        )
+
+    def warn_on_mismatching_name(self):
+        # type: () -> None
+        metadata_name = canonicalize_name(self.metadata["Name"])
+        if canonicalize_name(self.req.name) == metadata_name:
+            # Everything is fine.
+            return
+
+        # If we're here, there's a mismatch. Log a warning about it.
+        logger.warning(
+            'Generating metadata for package %s '
+            'produced metadata for project name %s. Fix your '
+            '#egg=%s fragments.',
+            self.name, metadata_name, self.name
+        )
+        self.req = Requirement(metadata_name)
+
+    def check_if_exists(self, use_user_site):
+        # type: (bool) -> None
+        """Find an installed distribution that satisfies or conflicts
+        with this requirement, and set self.satisfied_by or
+        self.should_reinstall appropriately.
+        """
+        if self.req is None:
+            return
+        existing_dist = get_distribution(self.req.name)
+        if not existing_dist:
+            return
+
+        existing_version = existing_dist.parsed_version
+        if not self.req.specifier.contains(existing_version, prereleases=True):
+            self.satisfied_by = None
+            if use_user_site:
+                if dist_in_usersite(existing_dist):
+                    self.should_reinstall = True
+                elif (running_under_virtualenv() and
+                        dist_in_site_packages(existing_dist)):
+                    raise InstallationError(
+                        "Will not install to the user site because it will "
+                        "lack sys.path precedence to {} in {}".format(
+                            existing_dist.project_name, existing_dist.location)
+                    )
+            else:
+                self.should_reinstall = True
+        else:
+            if self.editable:
+                self.should_reinstall = True
+                # when installing editables, nothing pre-existing should ever
+                # satisfy
+                self.satisfied_by = None
+            else:
+                self.satisfied_by = existing_dist
+
+    # Things valid for wheels
+    @property
+    def is_wheel(self):
+        # type: () -> bool
+        if not self.link:
+            return False
+        return self.link.is_wheel
+
+    # Things valid for sdists
+    @property
+    def unpacked_source_directory(self):
+        # type: () -> str
+        return os.path.join(
+            self.source_dir,
+            self.link and self.link.subdirectory_fragment or '')
+
+    @property
+    def setup_py_path(self):
+        # type: () -> str
+        assert self.source_dir, "No source dir for {}".format(self)
+        setup_py = os.path.join(self.unpacked_source_directory, 'setup.py')
+
+        # Python2 __file__ should not be unicode
+        if six.PY2 and isinstance(setup_py, six.text_type):
+            setup_py = setup_py.encode(sys.getfilesystemencoding())
+
+        return setup_py
+
+    @property
+    def pyproject_toml_path(self):
+        # type: () -> str
+        assert self.source_dir, "No source dir for {}".format(self)
+        return make_pyproject_path(self.unpacked_source_directory)
+
+    def load_pyproject_toml(self):
+        # type: () -> None
+        """Load the pyproject.toml file.
+
+        After calling this routine, all of the attributes related to PEP 517
+        processing for this requirement have been set. In particular, the
+        use_pep517 attribute can be used to determine whether we should
+        follow the PEP 517 or legacy (setup.py) code path.
+        """
+        pyproject_toml_data = load_pyproject_toml(
+            self.use_pep517,
+            self.pyproject_toml_path,
+            self.setup_py_path,
+            str(self)
+        )
+
+        if pyproject_toml_data is None:
+            self.use_pep517 = False
+            return
+
+        self.use_pep517 = True
+        requires, backend, check, backend_path = pyproject_toml_data
+        self.requirements_to_check = check
+        self.pyproject_requires = requires
+        self.pep517_backend = Pep517HookCaller(
+            self.unpacked_source_directory, backend, backend_path=backend_path,
+        )
+
+    def _generate_metadata(self):
+        # type: () -> str
+        """Invokes metadata generator functions, with the required arguments.
+        """
+        if not self.use_pep517:
+            assert self.unpacked_source_directory
+
+            return generate_metadata_legacy(
+                build_env=self.build_env,
+                setup_py_path=self.setup_py_path,
+                source_dir=self.unpacked_source_directory,
+                isolated=self.isolated,
+                details=self.name or "from {}".format(self.link)
+            )
+
+        assert self.pep517_backend is not None
+
+        return generate_metadata(
+            build_env=self.build_env,
+            backend=self.pep517_backend,
+        )
+
+    def prepare_metadata(self):
+        # type: () -> None
+        """Ensure that project metadata is available.
+
+        Under PEP 517, call the backend hook to prepare the metadata.
+        Under legacy processing, call setup.py egg-info.
+        """
+        assert self.source_dir
+
+        with indent_log():
+            self.metadata_directory = self._generate_metadata()
+
+        # Act on the newly generated metadata, based on the name and version.
+        if not self.name:
+            self._set_requirement()
+        else:
+            self.warn_on_mismatching_name()
+
+        self.assert_source_matches_version()
+
+    @property
+    def metadata(self):
+        # type: () -> Any
+        if not hasattr(self, '_metadata'):
+            self._metadata = get_metadata(self.get_dist())
+
+        return self._metadata
+
+    def get_dist(self):
+        # type: () -> Distribution
+        return _get_dist(self.metadata_directory)
+
+    def assert_source_matches_version(self):
+        # type: () -> None
+        assert self.source_dir
+        version = self.metadata['version']
+        if self.req.specifier and version not in self.req.specifier:
+            logger.warning(
+                'Requested %s, but installing version %s',
+                self,
+                version,
+            )
+        else:
+            logger.debug(
+                'Source in %s has version %s, which satisfies requirement %s',
+                display_path(self.source_dir),
+                version,
+                self,
+            )
+
+    # For both source distributions and editables
+    def ensure_has_source_dir(
+        self,
+        parent_dir,
+        autodelete=False,
+        parallel_builds=False,
+    ):
+        # type: (str, bool, bool) -> None
+        """Ensure that a source_dir is set.
+
+        This will create a temporary build dir if the name of the requirement
+        isn't known yet.
+
+        :param parent_dir: The ideal pip parent_dir for the source_dir.
+            Generally src_dir for editables and build_dir for sdists.
+        :return: self.source_dir
+        """
+        if self.source_dir is None:
+            self.source_dir = self.ensure_build_location(
+                parent_dir,
+                autodelete=autodelete,
+                parallel_builds=parallel_builds,
+            )
+
+    # For editable installations
+    def update_editable(self, obtain=True):
+        # type: (bool) -> None
+        if not self.link:
+            logger.debug(
+                "Cannot update repository at %s; repository location is "
+                "unknown",
+                self.source_dir,
+            )
+            return
+        assert self.editable
+        assert self.source_dir
+        if self.link.scheme == 'file':
+            # Static paths don't get updated
+            return
+        assert '+' in self.link.url, \
+            "bad url: {self.link.url!r}".format(**locals())
+        vc_type, url = self.link.url.split('+', 1)
+        vcs_backend = vcs.get_backend(vc_type)
+        if vcs_backend:
+            if not self.link.is_vcs:
+                reason = (
+                    "This form of VCS requirement is being deprecated: {}."
+                ).format(
+                    self.link.url
+                )
+                replacement = None
+                if self.link.url.startswith("git+git@"):
+                    replacement = (
+                        "git+https://git@example.com/..., "
+                        "git+ssh://git@example.com/..., "
+                        "or the insecure git+git://git@example.com/..."
+                    )
+                deprecated(reason, replacement, gone_in="21.0", issue=7554)
+            hidden_url = hide_url(self.link.url)
+            if obtain:
+                vcs_backend.obtain(self.source_dir, url=hidden_url)
+            else:
+                vcs_backend.export(self.source_dir, url=hidden_url)
+        else:
+            assert 0, (
+                'Unexpected version control type (in {}): {}'.format(
+                    self.link, vc_type))
+
+    # Top-level Actions
+    def uninstall(self, auto_confirm=False, verbose=False):
+        # type: (bool, bool) -> Optional[UninstallPathSet]
+        """
+        Uninstall the distribution currently satisfying this requirement.
+
+        Prompts before removing or modifying files unless
+        ``auto_confirm`` is True.
+
+        Refuses to delete or modify files outside of ``sys.prefix`` -
+        thus uninstallation within a virtual environment can only
+        modify that virtual environment, even if the virtualenv is
+        linked to global site-packages.
+
+        """
+        assert self.req
+        dist = get_distribution(self.req.name)
+        if not dist:
+            logger.warning("Skipping %s as it is not installed.", self.name)
+            return None
+        logger.info('Found existing installation: %s', dist)
+
+        uninstalled_pathset = UninstallPathSet.from_dist(dist)
+        uninstalled_pathset.remove(auto_confirm, verbose)
+        return uninstalled_pathset
+
+    def _get_archive_name(self, path, parentdir, rootdir):
+        # type: (str, str, str) -> str
+
+        def _clean_zip_name(name, prefix):
+            # type: (str, str) -> str
+            assert name.startswith(prefix + os.path.sep), (
+                "name {name!r} doesn't start with prefix {prefix!r}"
+                .format(**locals())
+            )
+            name = name[len(prefix) + 1:]
+            name = name.replace(os.path.sep, '/')
+            return name
+
+        path = os.path.join(parentdir, path)
+        name = _clean_zip_name(path, rootdir)
+        return self.name + '/' + name
+
+    def archive(self, build_dir):
+        # type: (str) -> None
+        """Saves archive to provided build_dir.
+
+        Used for saving downloaded VCS requirements as part of `pip download`.
+        """
+        assert self.source_dir
+
+        create_archive = True
+        archive_name = '{}-{}.zip'.format(self.name, self.metadata["version"])
+        archive_path = os.path.join(build_dir, archive_name)
+
+        if os.path.exists(archive_path):
+            response = ask_path_exists(
+                'The file {} exists. (i)gnore, (w)ipe, '
+                '(b)ackup, (a)bort '.format(
+                    display_path(archive_path)),
+                ('i', 'w', 'b', 'a'))
+            if response == 'i':
+                create_archive = False
+            elif response == 'w':
+                logger.warning('Deleting %s', display_path(archive_path))
+                os.remove(archive_path)
+            elif response == 'b':
+                dest_file = backup_dir(archive_path)
+                logger.warning(
+                    'Backing up %s to %s',
+                    display_path(archive_path),
+                    display_path(dest_file),
+                )
+                shutil.move(archive_path, dest_file)
+            elif response == 'a':
+                sys.exit(-1)
+
+        if not create_archive:
+            return
+
+        zip_output = zipfile.ZipFile(
+            archive_path, 'w', zipfile.ZIP_DEFLATED, allowZip64=True,
+        )
+        with zip_output:
+            dir = os.path.normcase(
+                os.path.abspath(self.unpacked_source_directory)
+            )
+            for dirpath, dirnames, filenames in os.walk(dir):
+                for dirname in dirnames:
+                    dir_arcname = self._get_archive_name(
+                        dirname, parentdir=dirpath, rootdir=dir,
+                    )
+                    zipdir = zipfile.ZipInfo(dir_arcname + '/')
+                    zipdir.external_attr = 0x1ED << 16  # 0o755
+                    zip_output.writestr(zipdir, '')
+                for filename in filenames:
+                    file_arcname = self._get_archive_name(
+                        filename, parentdir=dirpath, rootdir=dir,
+                    )
+                    filename = os.path.join(dirpath, filename)
+                    zip_output.write(filename, file_arcname)
+
+        logger.info('Saved %s', display_path(archive_path))
+
+    def install(
+        self,
+        install_options,  # type: List[str]
+        global_options=None,  # type: Optional[Sequence[str]]
+        root=None,  # type: Optional[str]
+        home=None,  # type: Optional[str]
+        prefix=None,  # type: Optional[str]
+        warn_script_location=True,  # type: bool
+        use_user_site=False,  # type: bool
+        pycompile=True  # type: bool
+    ):
+        # type: (...) -> None
+        scheme = get_scheme(
+            self.name,
+            user=use_user_site,
+            home=home,
+            root=root,
+            isolated=self.isolated,
+            prefix=prefix,
+        )
+
+        global_options = global_options if global_options is not None else []
+        if self.editable:
+            install_editable_legacy(
+                install_options,
+                global_options,
+                prefix=prefix,
+                home=home,
+                use_user_site=use_user_site,
+                name=self.name,
+                setup_py_path=self.setup_py_path,
+                isolated=self.isolated,
+                build_env=self.build_env,
+                unpacked_source_directory=self.unpacked_source_directory,
+            )
+            self.install_succeeded = True
+            return
+
+        if self.is_wheel:
+            assert self.local_file_path
+            direct_url = None
+            if self.original_link:
+                direct_url = direct_url_from_link(
+                    self.original_link,
+                    self.source_dir,
+                    self.original_link_is_in_wheel_cache,
+                )
+            install_wheel(
+                self.name,
+                self.local_file_path,
+                scheme=scheme,
+                req_description=str(self.req),
+                pycompile=pycompile,
+                warn_script_location=warn_script_location,
+                direct_url=direct_url,
+                requested=self.user_supplied,
+            )
+            self.install_succeeded = True
+            return
+
+        # TODO: Why don't we do this for editable installs?
+
+        # Extend the list of global and install options passed on to
+        # the setup.py call with the ones from the requirements file.
+        # Options specified in requirements file override those
+        # specified on the command line, since the last option given
+        # to setup.py is the one that is used.
+        global_options = list(global_options) + self.global_options
+        install_options = list(install_options) + self.install_options
+
+        try:
+            success = install_legacy(
+                install_options=install_options,
+                global_options=global_options,
+                root=root,
+                home=home,
+                prefix=prefix,
+                use_user_site=use_user_site,
+                pycompile=pycompile,
+                scheme=scheme,
+                setup_py_path=self.setup_py_path,
+                isolated=self.isolated,
+                req_name=self.name,
+                build_env=self.build_env,
+                unpacked_source_directory=self.unpacked_source_directory,
+                req_description=str(self.req),
+            )
+        except LegacyInstallFailure as exc:
+            self.install_succeeded = False
+            six.reraise(*exc.parent)
+        except Exception:
+            self.install_succeeded = True
+            raise
+
+        self.install_succeeded = success
+
+        if success and self.legacy_install_reason == 8368:
+            deprecated(
+                reason=(
+                    "{} was installed using the legacy 'setup.py install' "
+                    "method, because a wheel could not be built for it.".
+                    format(self.name)
+                ),
+                replacement="to fix the wheel build issue reported above",
+                gone_in="21.0",
+                issue=8368,
+            )
+
+
+def check_invalid_constraint_type(req):
+    # type: (InstallRequirement) -> str
+
+    # Check for unsupported forms
+    problem = ""
+    if not req.name:
+        problem = "Unnamed requirements are not allowed as constraints"
+    elif req.link:
+        problem = "Links are not allowed as constraints"
+    elif req.extras:
+        problem = "Constraints cannot have extras"
+
+    if problem:
+        deprecated(
+            reason=(
+                "Constraints are only allowed to take the form of a package "
+                "name and a version specifier. Other forms were originally "
+                "permitted as an accident of the implementation, but were "
+                "undocumented. The new implementation of the resolver no "
+                "longer supports these forms."
+            ),
+            replacement=(
+                "replacing the constraint with a requirement."
+            ),
+            # No plan yet for when the new resolver becomes default
+            gone_in=None,
+            issue=8210
+        )
+
+    return problem
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_set.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_set.py
new file mode 100644
index 0000000..ab4b6f8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_set.py
@@ -0,0 +1,203 @@
+from __future__ import absolute_import
+
+import logging
+from collections import OrderedDict
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.models.wheel import Wheel
+from pip._internal.utils import compatibility_tags
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Dict, Iterable, List, Optional, Tuple
+    from pip._internal.req.req_install import InstallRequirement
+
+
+logger = logging.getLogger(__name__)
+
+
+class RequirementSet(object):
+
+    def __init__(self, check_supported_wheels=True):
+        # type: (bool) -> None
+        """Create a RequirementSet.
+        """
+
+        self.requirements = OrderedDict()  # type: Dict[str, InstallRequirement]  # noqa: E501
+        self.check_supported_wheels = check_supported_wheels
+
+        self.unnamed_requirements = []  # type: List[InstallRequirement]
+
+    def __str__(self):
+        # type: () -> str
+        requirements = sorted(
+            (req for req in self.requirements.values() if not req.comes_from),
+            key=lambda req: canonicalize_name(req.name),
+        )
+        return ' '.join(str(req.req) for req in requirements)
+
+    def __repr__(self):
+        # type: () -> str
+        requirements = sorted(
+            self.requirements.values(),
+            key=lambda req: canonicalize_name(req.name),
+        )
+
+        format_string = '<{classname} object; {count} requirement(s): {reqs}>'
+        return format_string.format(
+            classname=self.__class__.__name__,
+            count=len(requirements),
+            reqs=', '.join(str(req.req) for req in requirements),
+        )
+
+    def add_unnamed_requirement(self, install_req):
+        # type: (InstallRequirement) -> None
+        assert not install_req.name
+        self.unnamed_requirements.append(install_req)
+
+    def add_named_requirement(self, install_req):
+        # type: (InstallRequirement) -> None
+        assert install_req.name
+
+        project_name = canonicalize_name(install_req.name)
+        self.requirements[project_name] = install_req
+
+    def add_requirement(
+        self,
+        install_req,  # type: InstallRequirement
+        parent_req_name=None,  # type: Optional[str]
+        extras_requested=None  # type: Optional[Iterable[str]]
+    ):
+        # type: (...) -> Tuple[List[InstallRequirement], Optional[InstallRequirement]]  # noqa: E501
+        """Add install_req as a requirement to install.
+
+        :param parent_req_name: The name of the requirement that needed this
+            added. The name is used because when multiple unnamed requirements
+            resolve to the same name, we could otherwise end up with dependency
+            links that point outside the Requirements set. parent_req must
+            already be added. Note that None implies that this is a user
+            supplied requirement, vs an inferred one.
+        :param extras_requested: an iterable of extras used to evaluate the
+            environment markers.
+        :return: Additional requirements to scan. That is either [] if
+            the requirement is not applicable, or [install_req] if the
+            requirement is applicable and has just been added.
+        """
+        # If the markers do not match, ignore this requirement.
+        if not install_req.match_markers(extras_requested):
+            logger.info(
+                "Ignoring %s: markers '%s' don't match your environment",
+                install_req.name, install_req.markers,
+            )
+            return [], None
+
+        # If the wheel is not supported, raise an error.
+        # Should check this after filtering out based on environment markers to
+        # allow specifying different wheels based on the environment/OS, in a
+        # single requirements file.
+        if install_req.link and install_req.link.is_wheel:
+            wheel = Wheel(install_req.link.filename)
+            tags = compatibility_tags.get_supported()
+            if (self.check_supported_wheels and not wheel.supported(tags)):
+                raise InstallationError(
+                    "{} is not a supported wheel on this platform.".format(
+                        wheel.filename)
+                )
+
+        # This next bit is really a sanity check.
+        assert not install_req.user_supplied or parent_req_name is None, (
+            "a user supplied req shouldn't have a parent"
+        )
+
+        # Unnamed requirements are scanned again and the requirement won't be
+        # added as a dependency until after scanning.
+        if not install_req.name:
+            self.add_unnamed_requirement(install_req)
+            return [install_req], None
+
+        try:
+            existing_req = self.get_requirement(
+                install_req.name)  # type: Optional[InstallRequirement]
+        except KeyError:
+            existing_req = None
+
+        has_conflicting_requirement = (
+            parent_req_name is None and
+            existing_req and
+            not existing_req.constraint and
+            existing_req.extras == install_req.extras and
+            existing_req.req.specifier != install_req.req.specifier
+        )
+        if has_conflicting_requirement:
+            raise InstallationError(
+                "Double requirement given: {} (already in {}, name={!r})"
+                .format(install_req, existing_req, install_req.name)
+            )
+
+        # When no existing requirement exists, add the requirement as a
+        # dependency and it will be scanned again after.
+        if not existing_req:
+            self.add_named_requirement(install_req)
+            # We'd want to rescan this requirement later
+            return [install_req], install_req
+
+        # Assume there's no need to scan, and that we've already
+        # encountered this for scanning.
+        if install_req.constraint or not existing_req.constraint:
+            return [], existing_req
+
+        does_not_satisfy_constraint = (
+            install_req.link and
+            not (
+                existing_req.link and
+                install_req.link.path == existing_req.link.path
+            )
+        )
+        if does_not_satisfy_constraint:
+            raise InstallationError(
+                "Could not satisfy constraints for '{}': "
+                "installation from path or url cannot be "
+                "constrained to a version".format(install_req.name)
+            )
+        # If we're now installing a constraint, mark the existing
+        # object for real installation.
+        existing_req.constraint = False
+        # If we're now installing a user supplied requirement,
+        # mark the existing object as such.
+        if install_req.user_supplied:
+            existing_req.user_supplied = True
+        existing_req.extras = tuple(sorted(
+            set(existing_req.extras) | set(install_req.extras)
+        ))
+        logger.debug(
+            "Setting %s extras to: %s",
+            existing_req, existing_req.extras,
+        )
+        # Return the existing requirement for addition to the parent and
+        # scanning again.
+        return [existing_req], existing_req
+
+    def has_requirement(self, name):
+        # type: (str) -> bool
+        project_name = canonicalize_name(name)
+
+        return (
+            project_name in self.requirements and
+            not self.requirements[project_name].constraint
+        )
+
+    def get_requirement(self, name):
+        # type: (str) -> InstallRequirement
+        project_name = canonicalize_name(name)
+
+        if project_name in self.requirements:
+            return self.requirements[project_name]
+
+        raise KeyError("No project with the name {name!r}".format(**locals()))
+
+    @property
+    def all_requirements(self):
+        # type: () -> List[InstallRequirement]
+        return self.unnamed_requirements + list(self.requirements.values())
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_tracker.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_tracker.py
new file mode 100644
index 0000000..13fb245
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_tracker.py
@@ -0,0 +1,150 @@
+from __future__ import absolute_import
+
+import contextlib
+import errno
+import hashlib
+import logging
+import os
+
+from pip._vendor import contextlib2
+
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from types import TracebackType
+    from typing import Dict, Iterator, Optional, Set, Type, Union
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.models.link import Link
+
+logger = logging.getLogger(__name__)
+
+
+@contextlib.contextmanager
+def update_env_context_manager(**changes):
+    # type: (str) -> Iterator[None]
+    target = os.environ
+
+    # Save values from the target and change them.
+    non_existent_marker = object()
+    saved_values = {}  # type: Dict[str, Union[object, str]]
+    for name, new_value in changes.items():
+        try:
+            saved_values[name] = target[name]
+        except KeyError:
+            saved_values[name] = non_existent_marker
+        target[name] = new_value
+
+    try:
+        yield
+    finally:
+        # Restore original values in the target.
+        for name, original_value in saved_values.items():
+            if original_value is non_existent_marker:
+                del target[name]
+            else:
+                assert isinstance(original_value, str)  # for mypy
+                target[name] = original_value
+
+
+@contextlib.contextmanager
+def get_requirement_tracker():
+    # type: () -> Iterator[RequirementTracker]
+    root = os.environ.get('PIP_REQ_TRACKER')
+    with contextlib2.ExitStack() as ctx:
+        if root is None:
+            root = ctx.enter_context(
+                TempDirectory(kind='req-tracker')
+            ).path
+            ctx.enter_context(update_env_context_manager(PIP_REQ_TRACKER=root))
+            logger.debug("Initialized build tracking at %s", root)
+
+        with RequirementTracker(root) as tracker:
+            yield tracker
+
+
+class RequirementTracker(object):
+
+    def __init__(self, root):
+        # type: (str) -> None
+        self._root = root
+        self._entries = set()  # type: Set[InstallRequirement]
+        logger.debug("Created build tracker: %s", self._root)
+
+    def __enter__(self):
+        # type: () -> RequirementTracker
+        logger.debug("Entered build tracker: %s", self._root)
+        return self
+
+    def __exit__(
+        self,
+        exc_type,  # type: Optional[Type[BaseException]]
+        exc_val,  # type: Optional[BaseException]
+        exc_tb  # type: Optional[TracebackType]
+    ):
+        # type: (...) -> None
+        self.cleanup()
+
+    def _entry_path(self, link):
+        # type: (Link) -> str
+        hashed = hashlib.sha224(link.url_without_fragment.encode()).hexdigest()
+        return os.path.join(self._root, hashed)
+
+    def add(self, req):
+        # type: (InstallRequirement) -> None
+        """Add an InstallRequirement to build tracking.
+        """
+
+        assert req.link
+        # Get the file to write information about this requirement.
+        entry_path = self._entry_path(req.link)
+
+        # Try reading from the file. If it exists and can be read from, a build
+        # is already in progress, so a LookupError is raised.
+        try:
+            with open(entry_path) as fp:
+                contents = fp.read()
+        except IOError as e:
+            # if the error is anything other than "file does not exist", raise.
+            if e.errno != errno.ENOENT:
+                raise
+        else:
+            message = '{} is already being built: {}'.format(
+                req.link, contents)
+            raise LookupError(message)
+
+        # If we're here, req should really not be building already.
+        assert req not in self._entries
+
+        # Start tracking this requirement.
+        with open(entry_path, 'w') as fp:
+            fp.write(str(req))
+        self._entries.add(req)
+
+        logger.debug('Added %s to build tracker %r', req, self._root)
+
+    def remove(self, req):
+        # type: (InstallRequirement) -> None
+        """Remove an InstallRequirement from build tracking.
+        """
+
+        assert req.link
+        # Delete the created file and the corresponding entries.
+        os.unlink(self._entry_path(req.link))
+        self._entries.remove(req)
+
+        logger.debug('Removed %s from build tracker %r', req, self._root)
+
+    def cleanup(self):
+        # type: () -> None
+        for req in set(self._entries):
+            self.remove(req)
+
+        logger.debug("Removed build tracker: %r", self._root)
+
+    @contextlib.contextmanager
+    def track(self, req):
+        # type: (InstallRequirement) -> Iterator[None]
+        self.add(req)
+        yield
+        self.remove(req)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_uninstall.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_uninstall.py
new file mode 100644
index 0000000..69719d3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/req/req_uninstall.py
@@ -0,0 +1,648 @@
+from __future__ import absolute_import
+
+import csv
+import functools
+import logging
+import os
+import sys
+import sysconfig
+
+from pip._vendor import pkg_resources
+
+from pip._internal.exceptions import UninstallationError
+from pip._internal.locations import bin_py, bin_user
+from pip._internal.utils.compat import WINDOWS, cache_from_source, uses_pycache
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import (
+    FakeFile,
+    ask,
+    dist_in_usersite,
+    dist_is_local,
+    egg_link_path,
+    is_local,
+    normalize_path,
+    renames,
+    rmtree,
+)
+from pip._internal.utils.temp_dir import AdjacentTempDirectory, TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Callable, Dict, Iterable, Iterator, List, Optional, Set, Tuple,
+    )
+    from pip._vendor.pkg_resources import Distribution
+
+logger = logging.getLogger(__name__)
+
+
+def _script_names(dist, script_name, is_gui):
+    # type: (Distribution, str, bool) -> List[str]
+    """Create the fully qualified name of the files created by
+    {console,gui}_scripts for the given ``dist``.
+    Returns the list of file names
+    """
+    if dist_in_usersite(dist):
+        bin_dir = bin_user
+    else:
+        bin_dir = bin_py
+    exe_name = os.path.join(bin_dir, script_name)
+    paths_to_remove = [exe_name]
+    if WINDOWS:
+        paths_to_remove.append(exe_name + '.exe')
+        paths_to_remove.append(exe_name + '.exe.manifest')
+        if is_gui:
+            paths_to_remove.append(exe_name + '-script.pyw')
+        else:
+            paths_to_remove.append(exe_name + '-script.py')
+    return paths_to_remove
+
+
+def _unique(fn):
+    # type: (Callable[..., Iterator[Any]]) -> Callable[..., Iterator[Any]]
+    @functools.wraps(fn)
+    def unique(*args, **kw):
+        # type: (Any, Any) -> Iterator[Any]
+        seen = set()  # type: Set[Any]
+        for item in fn(*args, **kw):
+            if item not in seen:
+                seen.add(item)
+                yield item
+    return unique
+
+
+@_unique
+def uninstallation_paths(dist):
+    # type: (Distribution) -> Iterator[str]
+    """
+    Yield all the uninstallation paths for dist based on RECORD-without-.py[co]
+
+    Yield paths to all the files in RECORD. For each .py file in RECORD, add
+    the .pyc and .pyo in the same directory.
+
+    UninstallPathSet.add() takes care of the __pycache__ .py[co].
+    """
+    r = csv.reader(FakeFile(dist.get_metadata_lines('RECORD')))
+    for row in r:
+        path = os.path.join(dist.location, row[0])
+        yield path
+        if path.endswith('.py'):
+            dn, fn = os.path.split(path)
+            base = fn[:-3]
+            path = os.path.join(dn, base + '.pyc')
+            yield path
+            path = os.path.join(dn, base + '.pyo')
+            yield path
+
+
+def compact(paths):
+    # type: (Iterable[str]) -> Set[str]
+    """Compact a path set to contain the minimal number of paths
+    necessary to contain all paths in the set. If /a/path/ and
+    /a/path/to/a/file.txt are both in the set, leave only the
+    shorter path."""
+
+    sep = os.path.sep
+    short_paths = set()  # type: Set[str]
+    for path in sorted(paths, key=len):
+        should_skip = any(
+            path.startswith(shortpath.rstrip("*")) and
+            path[len(shortpath.rstrip("*").rstrip(sep))] == sep
+            for shortpath in short_paths
+        )
+        if not should_skip:
+            short_paths.add(path)
+    return short_paths
+
+
+def compress_for_rename(paths):
+    # type: (Iterable[str]) -> Set[str]
+    """Returns a set containing the paths that need to be renamed.
+
+    This set may include directories when the original sequence of paths
+    included every file on disk.
+    """
+    case_map = dict((os.path.normcase(p), p) for p in paths)
+    remaining = set(case_map)
+    unchecked = sorted(set(os.path.split(p)[0]
+                           for p in case_map.values()), key=len)
+    wildcards = set()  # type: Set[str]
+
+    def norm_join(*a):
+        # type: (str) -> str
+        return os.path.normcase(os.path.join(*a))
+
+    for root in unchecked:
+        if any(os.path.normcase(root).startswith(w)
+               for w in wildcards):
+            # This directory has already been handled.
+            continue
+
+        all_files = set()  # type: Set[str]
+        all_subdirs = set()  # type: Set[str]
+        for dirname, subdirs, files in os.walk(root):
+            all_subdirs.update(norm_join(root, dirname, d)
+                               for d in subdirs)
+            all_files.update(norm_join(root, dirname, f)
+                             for f in files)
+        # If all the files we found are in our remaining set of files to
+        # remove, then remove them from the latter set and add a wildcard
+        # for the directory.
+        if not (all_files - remaining):
+            remaining.difference_update(all_files)
+            wildcards.add(root + os.sep)
+
+    return set(map(case_map.__getitem__, remaining)) | wildcards
+
+
+def compress_for_output_listing(paths):
+    # type: (Iterable[str]) -> Tuple[Set[str], Set[str]]
+    """Returns a tuple of 2 sets of which paths to display to user
+
+    The first set contains paths that would be deleted. Files of a package
+    are not added and the top-level directory of the package has a '*' added
+    at the end - to signify that all it's contents are removed.
+
+    The second set contains files that would have been skipped in the above
+    folders.
+    """
+
+    will_remove = set(paths)
+    will_skip = set()
+
+    # Determine folders and files
+    folders = set()
+    files = set()
+    for path in will_remove:
+        if path.endswith(".pyc"):
+            continue
+        if path.endswith("__init__.py") or ".dist-info" in path:
+            folders.add(os.path.dirname(path))
+        files.add(path)
+
+    # probably this one https://github.com/python/mypy/issues/390
+    _normcased_files = set(map(os.path.normcase, files))  # type: ignore
+
+    folders = compact(folders)
+
+    # This walks the tree using os.walk to not miss extra folders
+    # that might get added.
+    for folder in folders:
+        for dirpath, _, dirfiles in os.walk(folder):
+            for fname in dirfiles:
+                if fname.endswith(".pyc"):
+                    continue
+
+                file_ = os.path.join(dirpath, fname)
+                if (os.path.isfile(file_) and
+                        os.path.normcase(file_) not in _normcased_files):
+                    # We are skipping this file. Add it to the set.
+                    will_skip.add(file_)
+
+    will_remove = files | {
+        os.path.join(folder, "*") for folder in folders
+    }
+
+    return will_remove, will_skip
+
+
+class StashedUninstallPathSet(object):
+    """A set of file rename operations to stash files while
+    tentatively uninstalling them."""
+    def __init__(self):
+        # type: () -> None
+        # Mapping from source file root to [Adjacent]TempDirectory
+        # for files under that directory.
+        self._save_dirs = {}  # type: Dict[str, TempDirectory]
+        # (old path, new path) tuples for each move that may need
+        # to be undone.
+        self._moves = []  # type: List[Tuple[str, str]]
+
+    def _get_directory_stash(self, path):
+        # type: (str) -> str
+        """Stashes a directory.
+
+        Directories are stashed adjacent to their original location if
+        possible, or else moved/copied into the user's temp dir."""
+
+        try:
+            save_dir = AdjacentTempDirectory(path)  # type: TempDirectory
+        except OSError:
+            save_dir = TempDirectory(kind="uninstall")
+        self._save_dirs[os.path.normcase(path)] = save_dir
+
+        return save_dir.path
+
+    def _get_file_stash(self, path):
+        # type: (str) -> str
+        """Stashes a file.
+
+        If no root has been provided, one will be created for the directory
+        in the user's temp directory."""
+        path = os.path.normcase(path)
+        head, old_head = os.path.dirname(path), None
+        save_dir = None
+
+        while head != old_head:
+            try:
+                save_dir = self._save_dirs[head]
+                break
+            except KeyError:
+                pass
+            head, old_head = os.path.dirname(head), head
+        else:
+            # Did not find any suitable root
+            head = os.path.dirname(path)
+            save_dir = TempDirectory(kind='uninstall')
+            self._save_dirs[head] = save_dir
+
+        relpath = os.path.relpath(path, head)
+        if relpath and relpath != os.path.curdir:
+            return os.path.join(save_dir.path, relpath)
+        return save_dir.path
+
+    def stash(self, path):
+        # type: (str) -> str
+        """Stashes the directory or file and returns its new location.
+        Handle symlinks as files to avoid modifying the symlink targets.
+        """
+        path_is_dir = os.path.isdir(path) and not os.path.islink(path)
+        if path_is_dir:
+            new_path = self._get_directory_stash(path)
+        else:
+            new_path = self._get_file_stash(path)
+
+        self._moves.append((path, new_path))
+        if (path_is_dir and os.path.isdir(new_path)):
+            # If we're moving a directory, we need to
+            # remove the destination first or else it will be
+            # moved to inside the existing directory.
+            # We just created new_path ourselves, so it will
+            # be removable.
+            os.rmdir(new_path)
+        renames(path, new_path)
+        return new_path
+
+    def commit(self):
+        # type: () -> None
+        """Commits the uninstall by removing stashed files."""
+        for _, save_dir in self._save_dirs.items():
+            save_dir.cleanup()
+        self._moves = []
+        self._save_dirs = {}
+
+    def rollback(self):
+        # type: () -> None
+        """Undoes the uninstall by moving stashed files back."""
+        for p in self._moves:
+            logger.info("Moving to %s\n from %s", *p)
+
+        for new_path, path in self._moves:
+            try:
+                logger.debug('Replacing %s from %s', new_path, path)
+                if os.path.isfile(new_path) or os.path.islink(new_path):
+                    os.unlink(new_path)
+                elif os.path.isdir(new_path):
+                    rmtree(new_path)
+                renames(path, new_path)
+            except OSError as ex:
+                logger.error("Failed to restore %s", new_path)
+                logger.debug("Exception: %s", ex)
+
+        self.commit()
+
+    @property
+    def can_rollback(self):
+        # type: () -> bool
+        return bool(self._moves)
+
+
+class UninstallPathSet(object):
+    """A set of file paths to be removed in the uninstallation of a
+    requirement."""
+    def __init__(self, dist):
+        # type: (Distribution) -> None
+        self.paths = set()  # type: Set[str]
+        self._refuse = set()  # type: Set[str]
+        self.pth = {}  # type: Dict[str, UninstallPthEntries]
+        self.dist = dist
+        self._moved_paths = StashedUninstallPathSet()
+
+    def _permitted(self, path):
+        # type: (str) -> bool
+        """
+        Return True if the given path is one we are permitted to
+        remove/modify, False otherwise.
+
+        """
+        return is_local(path)
+
+    def add(self, path):
+        # type: (str) -> None
+        head, tail = os.path.split(path)
+
+        # we normalize the head to resolve parent directory symlinks, but not
+        # the tail, since we only want to uninstall symlinks, not their targets
+        path = os.path.join(normalize_path(head), os.path.normcase(tail))
+
+        if not os.path.exists(path):
+            return
+        if self._permitted(path):
+            self.paths.add(path)
+        else:
+            self._refuse.add(path)
+
+        # __pycache__ files can show up after 'installed-files.txt' is created,
+        # due to imports
+        if os.path.splitext(path)[1] == '.py' and uses_pycache:
+            self.add(cache_from_source(path))
+
+    def add_pth(self, pth_file, entry):
+        # type: (str, str) -> None
+        pth_file = normalize_path(pth_file)
+        if self._permitted(pth_file):
+            if pth_file not in self.pth:
+                self.pth[pth_file] = UninstallPthEntries(pth_file)
+            self.pth[pth_file].add(entry)
+        else:
+            self._refuse.add(pth_file)
+
+    def remove(self, auto_confirm=False, verbose=False):
+        # type: (bool, bool) -> None
+        """Remove paths in ``self.paths`` with confirmation (unless
+        ``auto_confirm`` is True)."""
+
+        if not self.paths:
+            logger.info(
+                "Can't uninstall '%s'. No files were found to uninstall.",
+                self.dist.project_name,
+            )
+            return
+
+        dist_name_version = (
+            self.dist.project_name + "-" + self.dist.version
+        )
+        logger.info('Uninstalling %s:', dist_name_version)
+
+        with indent_log():
+            if auto_confirm or self._allowed_to_proceed(verbose):
+                moved = self._moved_paths
+
+                for_rename = compress_for_rename(self.paths)
+
+                for path in sorted(compact(for_rename)):
+                    moved.stash(path)
+                    logger.debug('Removing file or directory %s', path)
+
+                for pth in self.pth.values():
+                    pth.remove()
+
+                logger.info('Successfully uninstalled %s', dist_name_version)
+
+    def _allowed_to_proceed(self, verbose):
+        # type: (bool) -> bool
+        """Display which files would be deleted and prompt for confirmation
+        """
+
+        def _display(msg, paths):
+            # type: (str, Iterable[str]) -> None
+            if not paths:
+                return
+
+            logger.info(msg)
+            with indent_log():
+                for path in sorted(compact(paths)):
+                    logger.info(path)
+
+        if not verbose:
+            will_remove, will_skip = compress_for_output_listing(self.paths)
+        else:
+            # In verbose mode, display all the files that are going to be
+            # deleted.
+            will_remove = set(self.paths)
+            will_skip = set()
+
+        _display('Would remove:', will_remove)
+        _display('Would not remove (might be manually added):', will_skip)
+        _display('Would not remove (outside of prefix):', self._refuse)
+        if verbose:
+            _display('Will actually move:', compress_for_rename(self.paths))
+
+        return ask('Proceed (y/n)? ', ('y', 'n')) == 'y'
+
+    def rollback(self):
+        # type: () -> None
+        """Rollback the changes previously made by remove()."""
+        if not self._moved_paths.can_rollback:
+            logger.error(
+                "Can't roll back %s; was not uninstalled",
+                self.dist.project_name,
+            )
+            return
+        logger.info('Rolling back uninstall of %s', self.dist.project_name)
+        self._moved_paths.rollback()
+        for pth in self.pth.values():
+            pth.rollback()
+
+    def commit(self):
+        # type: () -> None
+        """Remove temporary save dir: rollback will no longer be possible."""
+        self._moved_paths.commit()
+
+    @classmethod
+    def from_dist(cls, dist):
+        # type: (Distribution) -> UninstallPathSet
+        dist_path = normalize_path(dist.location)
+        if not dist_is_local(dist):
+            logger.info(
+                "Not uninstalling %s at %s, outside environment %s",
+                dist.key,
+                dist_path,
+                sys.prefix,
+            )
+            return cls(dist)
+
+        if dist_path in {p for p in {sysconfig.get_path("stdlib"),
+                                     sysconfig.get_path("platstdlib")}
+                         if p}:
+            logger.info(
+                "Not uninstalling %s at %s, as it is in the standard library.",
+                dist.key,
+                dist_path,
+            )
+            return cls(dist)
+
+        paths_to_remove = cls(dist)
+        develop_egg_link = egg_link_path(dist)
+        develop_egg_link_egg_info = '{}.egg-info'.format(
+            pkg_resources.to_filename(dist.project_name))
+        egg_info_exists = dist.egg_info and os.path.exists(dist.egg_info)
+        # Special case for distutils installed package
+        distutils_egg_info = getattr(dist._provider, 'path', None)
+
+        # Uninstall cases order do matter as in the case of 2 installs of the
+        # same package, pip needs to uninstall the currently detected version
+        if (egg_info_exists and dist.egg_info.endswith('.egg-info') and
+                not dist.egg_info.endswith(develop_egg_link_egg_info)):
+            # if dist.egg_info.endswith(develop_egg_link_egg_info), we
+            # are in fact in the develop_egg_link case
+            paths_to_remove.add(dist.egg_info)
+            if dist.has_metadata('installed-files.txt'):
+                for installed_file in dist.get_metadata(
+                        'installed-files.txt').splitlines():
+                    path = os.path.normpath(
+                        os.path.join(dist.egg_info, installed_file)
+                    )
+                    paths_to_remove.add(path)
+            # FIXME: need a test for this elif block
+            # occurs with --single-version-externally-managed/--record outside
+            # of pip
+            elif dist.has_metadata('top_level.txt'):
+                if dist.has_metadata('namespace_packages.txt'):
+                    namespaces = dist.get_metadata('namespace_packages.txt')
+                else:
+                    namespaces = []
+                for top_level_pkg in [
+                        p for p
+                        in dist.get_metadata('top_level.txt').splitlines()
+                        if p and p not in namespaces]:
+                    path = os.path.join(dist.location, top_level_pkg)
+                    paths_to_remove.add(path)
+                    paths_to_remove.add(path + '.py')
+                    paths_to_remove.add(path + '.pyc')
+                    paths_to_remove.add(path + '.pyo')
+
+        elif distutils_egg_info:
+            raise UninstallationError(
+                "Cannot uninstall {!r}. It is a distutils installed project "
+                "and thus we cannot accurately determine which files belong "
+                "to it which would lead to only a partial uninstall.".format(
+                    dist.project_name,
+                )
+            )
+
+        elif dist.location.endswith('.egg'):
+            # package installed by easy_install
+            # We cannot match on dist.egg_name because it can slightly vary
+            # i.e. setuptools-0.6c11-py2.6.egg vs setuptools-0.6rc11-py2.6.egg
+            paths_to_remove.add(dist.location)
+            easy_install_egg = os.path.split(dist.location)[1]
+            easy_install_pth = os.path.join(os.path.dirname(dist.location),
+                                            'easy-install.pth')
+            paths_to_remove.add_pth(easy_install_pth, './' + easy_install_egg)
+
+        elif egg_info_exists and dist.egg_info.endswith('.dist-info'):
+            for path in uninstallation_paths(dist):
+                paths_to_remove.add(path)
+
+        elif develop_egg_link:
+            # develop egg
+            with open(develop_egg_link, 'r') as fh:
+                link_pointer = os.path.normcase(fh.readline().strip())
+            assert (link_pointer == dist.location), (
+                'Egg-link {} does not match installed location of {} '
+                '(at {})'.format(
+                    link_pointer, dist.project_name, dist.location)
+            )
+            paths_to_remove.add(develop_egg_link)
+            easy_install_pth = os.path.join(os.path.dirname(develop_egg_link),
+                                            'easy-install.pth')
+            paths_to_remove.add_pth(easy_install_pth, dist.location)
+
+        else:
+            logger.debug(
+                'Not sure how to uninstall: %s - Check: %s',
+                dist, dist.location,
+            )
+
+        # find distutils scripts= scripts
+        if dist.has_metadata('scripts') and dist.metadata_isdir('scripts'):
+            for script in dist.metadata_listdir('scripts'):
+                if dist_in_usersite(dist):
+                    bin_dir = bin_user
+                else:
+                    bin_dir = bin_py
+                paths_to_remove.add(os.path.join(bin_dir, script))
+                if WINDOWS:
+                    paths_to_remove.add(os.path.join(bin_dir, script) + '.bat')
+
+        # find console_scripts
+        _scripts_to_remove = []
+        console_scripts = dist.get_entry_map(group='console_scripts')
+        for name in console_scripts.keys():
+            _scripts_to_remove.extend(_script_names(dist, name, False))
+        # find gui_scripts
+        gui_scripts = dist.get_entry_map(group='gui_scripts')
+        for name in gui_scripts.keys():
+            _scripts_to_remove.extend(_script_names(dist, name, True))
+
+        for s in _scripts_to_remove:
+            paths_to_remove.add(s)
+
+        return paths_to_remove
+
+
+class UninstallPthEntries(object):
+    def __init__(self, pth_file):
+        # type: (str) -> None
+        self.file = pth_file
+        self.entries = set()  # type: Set[str]
+        self._saved_lines = None  # type: Optional[List[bytes]]
+
+    def add(self, entry):
+        # type: (str) -> None
+        entry = os.path.normcase(entry)
+        # On Windows, os.path.normcase converts the entry to use
+        # backslashes.  This is correct for entries that describe absolute
+        # paths outside of site-packages, but all the others use forward
+        # slashes.
+        # os.path.splitdrive is used instead of os.path.isabs because isabs
+        # treats non-absolute paths with drive letter markings like c:foo\bar
+        # as absolute paths. It also does not recognize UNC paths if they don't
+        # have more than "\\sever\share". Valid examples: "\\server\share\" or
+        # "\\server\share\folder". Python 2.7.8+ support UNC in splitdrive.
+        if WINDOWS and not os.path.splitdrive(entry)[0]:
+            entry = entry.replace('\\', '/')
+        self.entries.add(entry)
+
+    def remove(self):
+        # type: () -> None
+        logger.debug('Removing pth entries from %s:', self.file)
+
+        # If the file doesn't exist, log a warning and return
+        if not os.path.isfile(self.file):
+            logger.warning(
+                "Cannot remove entries from nonexistent file %s", self.file
+            )
+            return
+        with open(self.file, 'rb') as fh:
+            # windows uses '\r\n' with py3k, but uses '\n' with py2.x
+            lines = fh.readlines()
+            self._saved_lines = lines
+        if any(b'\r\n' in line for line in lines):
+            endline = '\r\n'
+        else:
+            endline = '\n'
+        # handle missing trailing newline
+        if lines and not lines[-1].endswith(endline.encode("utf-8")):
+            lines[-1] = lines[-1] + endline.encode("utf-8")
+        for entry in self.entries:
+            try:
+                logger.debug('Removing entry: %s', entry)
+                lines.remove((entry + endline).encode("utf-8"))
+            except ValueError:
+                pass
+        with open(self.file, 'wb') as fh:
+            fh.writelines(lines)
+
+    def rollback(self):
+        # type: () -> bool
+        if self._saved_lines is None:
+            logger.error(
+                'Cannot roll back changes to %s, none were made', self.file
+            )
+            return False
+        logger.debug('Rolling %s back to previous state', self.file)
+        with open(self.file, 'wb') as fh:
+            fh.writelines(self._saved_lines)
+        return True
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/__init__.py
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/base.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/base.py
new file mode 100644
index 0000000..2fa118b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/base.py
@@ -0,0 +1,20 @@
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Callable, List
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.req.req_set import RequirementSet
+
+    InstallRequirementProvider = Callable[
+        [str, InstallRequirement], InstallRequirement
+    ]
+
+
+class BaseResolver(object):
+    def resolve(self, root_reqs, check_supported_wheels):
+        # type: (List[InstallRequirement], bool) -> RequirementSet
+        raise NotImplementedError()
+
+    def get_installation_order(self, req_set):
+        # type: (RequirementSet) -> List[InstallRequirement]
+        raise NotImplementedError()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/legacy/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/legacy/__init__.py
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py
new file mode 100644
index 0000000..c9b4c66
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/legacy/resolver.py
@@ -0,0 +1,485 @@
+"""Dependency Resolution
+
+The dependency resolution in pip is performed as follows:
+
+for top-level requirements:
+    a. only one spec allowed per project, regardless of conflicts or not.
+       otherwise a "double requirement" exception is raised
+    b. they override sub-dependency requirements.
+for sub-dependencies
+    a. "first found, wins" (where the order is breadth first)
+"""
+
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+# mypy: disallow-untyped-defs=False
+
+import logging
+import sys
+from collections import defaultdict
+from itertools import chain
+
+from pip._vendor.packaging import specifiers
+
+from pip._internal.exceptions import (
+    BestVersionAlreadyInstalled,
+    DistributionNotFound,
+    HashError,
+    HashErrors,
+    UnsupportedPythonVersion,
+)
+from pip._internal.req.req_install import check_invalid_constraint_type
+from pip._internal.req.req_set import RequirementSet
+from pip._internal.resolution.base import BaseResolver
+from pip._internal.utils.compatibility_tags import get_supported
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import dist_in_usersite, normalize_version_info
+from pip._internal.utils.packaging import (
+    check_requires_python,
+    get_requires_python,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import DefaultDict, List, Optional, Set, Tuple
+    from pip._vendor import pkg_resources
+
+    from pip._internal.cache import WheelCache
+    from pip._internal.distributions import AbstractDistribution
+    from pip._internal.index.package_finder import PackageFinder
+    from pip._internal.models.link import Link
+    from pip._internal.operations.prepare import RequirementPreparer
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.resolution.base import InstallRequirementProvider
+
+    DiscoveredDependencies = DefaultDict[str, List[InstallRequirement]]
+
+logger = logging.getLogger(__name__)
+
+
+def _check_dist_requires_python(
+    dist,  # type: pkg_resources.Distribution
+    version_info,  # type: Tuple[int, int, int]
+    ignore_requires_python=False,  # type: bool
+):
+    # type: (...) -> None
+    """
+    Check whether the given Python version is compatible with a distribution's
+    "Requires-Python" value.
+
+    :param version_info: A 3-tuple of ints representing the Python
+        major-minor-micro version to check.
+    :param ignore_requires_python: Whether to ignore the "Requires-Python"
+        value if the given Python version isn't compatible.
+
+    :raises UnsupportedPythonVersion: When the given Python version isn't
+        compatible.
+    """
+    requires_python = get_requires_python(dist)
+    try:
+        is_compatible = check_requires_python(
+            requires_python, version_info=version_info,
+        )
+    except specifiers.InvalidSpecifier as exc:
+        logger.warning(
+            "Package %r has an invalid Requires-Python: %s",
+            dist.project_name, exc,
+        )
+        return
+
+    if is_compatible:
+        return
+
+    version = '.'.join(map(str, version_info))
+    if ignore_requires_python:
+        logger.debug(
+            'Ignoring failed Requires-Python check for package %r: '
+            '%s not in %r',
+            dist.project_name, version, requires_python,
+        )
+        return
+
+    raise UnsupportedPythonVersion(
+        'Package {!r} requires a different Python: {} not in {!r}'.format(
+            dist.project_name, version, requires_python,
+        ))
+
+
+class Resolver(BaseResolver):
+    """Resolves which packages need to be installed/uninstalled to perform \
+    the requested operation without breaking the requirements of any package.
+    """
+
+    _allowed_strategies = {"eager", "only-if-needed", "to-satisfy-only"}
+
+    def __init__(
+        self,
+        preparer,  # type: RequirementPreparer
+        finder,  # type: PackageFinder
+        wheel_cache,  # type: Optional[WheelCache]
+        make_install_req,  # type: InstallRequirementProvider
+        use_user_site,  # type: bool
+        ignore_dependencies,  # type: bool
+        ignore_installed,  # type: bool
+        ignore_requires_python,  # type: bool
+        force_reinstall,  # type: bool
+        upgrade_strategy,  # type: str
+        py_version_info=None,  # type: Optional[Tuple[int, ...]]
+    ):
+        # type: (...) -> None
+        super(Resolver, self).__init__()
+        assert upgrade_strategy in self._allowed_strategies
+
+        if py_version_info is None:
+            py_version_info = sys.version_info[:3]
+        else:
+            py_version_info = normalize_version_info(py_version_info)
+
+        self._py_version_info = py_version_info
+
+        self.preparer = preparer
+        self.finder = finder
+        self.wheel_cache = wheel_cache
+
+        self.upgrade_strategy = upgrade_strategy
+        self.force_reinstall = force_reinstall
+        self.ignore_dependencies = ignore_dependencies
+        self.ignore_installed = ignore_installed
+        self.ignore_requires_python = ignore_requires_python
+        self.use_user_site = use_user_site
+        self._make_install_req = make_install_req
+
+        self._discovered_dependencies = \
+            defaultdict(list)  # type: DiscoveredDependencies
+
+    def resolve(self, root_reqs, check_supported_wheels):
+        # type: (List[InstallRequirement], bool) -> RequirementSet
+        """Resolve what operations need to be done
+
+        As a side-effect of this method, the packages (and their dependencies)
+        are downloaded, unpacked and prepared for installation. This
+        preparation is done by ``pip.operations.prepare``.
+
+        Once PyPI has static dependency metadata available, it would be
+        possible to move the preparation to become a step separated from
+        dependency resolution.
+        """
+        requirement_set = RequirementSet(
+            check_supported_wheels=check_supported_wheels
+        )
+        for req in root_reqs:
+            if req.constraint:
+                check_invalid_constraint_type(req)
+            requirement_set.add_requirement(req)
+
+        # Actually prepare the files, and collect any exceptions. Most hash
+        # exceptions cannot be checked ahead of time, because
+        # _populate_link() needs to be called before we can make decisions
+        # based on link type.
+        discovered_reqs = []  # type: List[InstallRequirement]
+        hash_errors = HashErrors()
+        for req in chain(requirement_set.all_requirements, discovered_reqs):
+            try:
+                discovered_reqs.extend(self._resolve_one(requirement_set, req))
+            except HashError as exc:
+                exc.req = req
+                hash_errors.append(exc)
+
+        if hash_errors:
+            raise hash_errors
+
+        return requirement_set
+
+    def _is_upgrade_allowed(self, req):
+        # type: (InstallRequirement) -> bool
+        if self.upgrade_strategy == "to-satisfy-only":
+            return False
+        elif self.upgrade_strategy == "eager":
+            return True
+        else:
+            assert self.upgrade_strategy == "only-if-needed"
+            return req.user_supplied or req.constraint
+
+    def _set_req_to_reinstall(self, req):
+        # type: (InstallRequirement) -> None
+        """
+        Set a requirement to be installed.
+        """
+        # Don't uninstall the conflict if doing a user install and the
+        # conflict is not a user install.
+        if not self.use_user_site or dist_in_usersite(req.satisfied_by):
+            req.should_reinstall = True
+        req.satisfied_by = None
+
+    def _check_skip_installed(self, req_to_install):
+        # type: (InstallRequirement) -> Optional[str]
+        """Check if req_to_install should be skipped.
+
+        This will check if the req is installed, and whether we should upgrade
+        or reinstall it, taking into account all the relevant user options.
+
+        After calling this req_to_install will only have satisfied_by set to
+        None if the req_to_install is to be upgraded/reinstalled etc. Any
+        other value will be a dist recording the current thing installed that
+        satisfies the requirement.
+
+        Note that for vcs urls and the like we can't assess skipping in this
+        routine - we simply identify that we need to pull the thing down,
+        then later on it is pulled down and introspected to assess upgrade/
+        reinstalls etc.
+
+        :return: A text reason for why it was skipped, or None.
+        """
+        if self.ignore_installed:
+            return None
+
+        req_to_install.check_if_exists(self.use_user_site)
+        if not req_to_install.satisfied_by:
+            return None
+
+        if self.force_reinstall:
+            self._set_req_to_reinstall(req_to_install)
+            return None
+
+        if not self._is_upgrade_allowed(req_to_install):
+            if self.upgrade_strategy == "only-if-needed":
+                return 'already satisfied, skipping upgrade'
+            return 'already satisfied'
+
+        # Check for the possibility of an upgrade.  For link-based
+        # requirements we have to pull the tree down and inspect to assess
+        # the version #, so it's handled way down.
+        if not req_to_install.link:
+            try:
+                self.finder.find_requirement(req_to_install, upgrade=True)
+            except BestVersionAlreadyInstalled:
+                # Then the best version is installed.
+                return 'already up-to-date'
+            except DistributionNotFound:
+                # No distribution found, so we squash the error.  It will
+                # be raised later when we re-try later to do the install.
+                # Why don't we just raise here?
+                pass
+
+        self._set_req_to_reinstall(req_to_install)
+        return None
+
+    def _find_requirement_link(self, req):
+        # type: (InstallRequirement) -> Optional[Link]
+        upgrade = self._is_upgrade_allowed(req)
+        best_candidate = self.finder.find_requirement(req, upgrade)
+        if not best_candidate:
+            return None
+
+        # Log a warning per PEP 592 if necessary before returning.
+        link = best_candidate.link
+        if link.is_yanked:
+            reason = link.yanked_reason or '<none given>'
+            msg = (
+                # Mark this as a unicode string to prevent
+                # "UnicodeEncodeError: 'ascii' codec can't encode character"
+                # in Python 2 when the reason contains non-ascii characters.
+                u'The candidate selected for download or install is a '
+                'yanked version: {candidate}\n'
+                'Reason for being yanked: {reason}'
+            ).format(candidate=best_candidate, reason=reason)
+            logger.warning(msg)
+
+        return link
+
+    def _populate_link(self, req):
+        # type: (InstallRequirement) -> None
+        """Ensure that if a link can be found for this, that it is found.
+
+        Note that req.link may still be None - if the requirement is already
+        installed and not needed to be upgraded based on the return value of
+        _is_upgrade_allowed().
+
+        If preparer.require_hashes is True, don't use the wheel cache, because
+        cached wheels, always built locally, have different hashes than the
+        files downloaded from the index server and thus throw false hash
+        mismatches. Furthermore, cached wheels at present have undeterministic
+        contents due to file modification times.
+        """
+        if req.link is None:
+            req.link = self._find_requirement_link(req)
+
+        if self.wheel_cache is None or self.preparer.require_hashes:
+            return
+        cache_entry = self.wheel_cache.get_cache_entry(
+            link=req.link,
+            package_name=req.name,
+            supported_tags=get_supported(),
+        )
+        if cache_entry is not None:
+            logger.debug('Using cached wheel link: %s', cache_entry.link)
+            if req.link is req.original_link and cache_entry.persistent:
+                req.original_link_is_in_wheel_cache = True
+            req.link = cache_entry.link
+
+    def _get_abstract_dist_for(self, req):
+        # type: (InstallRequirement) -> AbstractDistribution
+        """Takes a InstallRequirement and returns a single AbstractDist \
+        representing a prepared variant of the same.
+        """
+        if req.editable:
+            return self.preparer.prepare_editable_requirement(req)
+
+        # satisfied_by is only evaluated by calling _check_skip_installed,
+        # so it must be None here.
+        assert req.satisfied_by is None
+        skip_reason = self._check_skip_installed(req)
+
+        if req.satisfied_by:
+            return self.preparer.prepare_installed_requirement(
+                req, skip_reason
+            )
+
+        # We eagerly populate the link, since that's our "legacy" behavior.
+        self._populate_link(req)
+        abstract_dist = self.preparer.prepare_linked_requirement(req)
+
+        # NOTE
+        # The following portion is for determining if a certain package is
+        # going to be re-installed/upgraded or not and reporting to the user.
+        # This should probably get cleaned up in a future refactor.
+
+        # req.req is only avail after unpack for URL
+        # pkgs repeat check_if_exists to uninstall-on-upgrade
+        # (#14)
+        if not self.ignore_installed:
+            req.check_if_exists(self.use_user_site)
+
+        if req.satisfied_by:
+            should_modify = (
+                self.upgrade_strategy != "to-satisfy-only" or
+                self.force_reinstall or
+                self.ignore_installed or
+                req.link.scheme == 'file'
+            )
+            if should_modify:
+                self._set_req_to_reinstall(req)
+            else:
+                logger.info(
+                    'Requirement already satisfied (use --upgrade to upgrade):'
+                    ' %s', req,
+                )
+
+        return abstract_dist
+
+    def _resolve_one(
+        self,
+        requirement_set,  # type: RequirementSet
+        req_to_install,  # type: InstallRequirement
+    ):
+        # type: (...) -> List[InstallRequirement]
+        """Prepare a single requirements file.
+
+        :return: A list of additional InstallRequirements to also install.
+        """
+        # Tell user what we are doing for this requirement:
+        # obtain (editable), skipping, processing (local url), collecting
+        # (remote url or package name)
+        if req_to_install.constraint or req_to_install.prepared:
+            return []
+
+        req_to_install.prepared = True
+
+        abstract_dist = self._get_abstract_dist_for(req_to_install)
+
+        # Parse and return dependencies
+        dist = abstract_dist.get_pkg_resources_distribution()
+        # This will raise UnsupportedPythonVersion if the given Python
+        # version isn't compatible with the distribution's Requires-Python.
+        _check_dist_requires_python(
+            dist, version_info=self._py_version_info,
+            ignore_requires_python=self.ignore_requires_python,
+        )
+
+        more_reqs = []  # type: List[InstallRequirement]
+
+        def add_req(subreq, extras_requested):
+            sub_install_req = self._make_install_req(
+                str(subreq),
+                req_to_install,
+            )
+            parent_req_name = req_to_install.name
+            to_scan_again, add_to_parent = requirement_set.add_requirement(
+                sub_install_req,
+                parent_req_name=parent_req_name,
+                extras_requested=extras_requested,
+            )
+            if parent_req_name and add_to_parent:
+                self._discovered_dependencies[parent_req_name].append(
+                    add_to_parent
+                )
+            more_reqs.extend(to_scan_again)
+
+        with indent_log():
+            # We add req_to_install before its dependencies, so that we
+            # can refer to it when adding dependencies.
+            if not requirement_set.has_requirement(req_to_install.name):
+                # 'unnamed' requirements will get added here
+                # 'unnamed' requirements can only come from being directly
+                # provided by the user.
+                assert req_to_install.user_supplied
+                requirement_set.add_requirement(
+                    req_to_install, parent_req_name=None,
+                )
+
+            if not self.ignore_dependencies:
+                if req_to_install.extras:
+                    logger.debug(
+                        "Installing extra requirements: %r",
+                        ','.join(req_to_install.extras),
+                    )
+                missing_requested = sorted(
+                    set(req_to_install.extras) - set(dist.extras)
+                )
+                for missing in missing_requested:
+                    logger.warning(
+                        "%s does not provide the extra '%s'",
+                        dist, missing
+                    )
+
+                available_requested = sorted(
+                    set(dist.extras) & set(req_to_install.extras)
+                )
+                for subreq in dist.requires(available_requested):
+                    add_req(subreq, extras_requested=available_requested)
+
+            if not req_to_install.editable and not req_to_install.satisfied_by:
+                # XXX: --no-install leads this to report 'Successfully
+                # downloaded' for only non-editable reqs, even though we took
+                # action on them.
+                req_to_install.successfully_downloaded = True
+
+        return more_reqs
+
+    def get_installation_order(self, req_set):
+        # type: (RequirementSet) -> List[InstallRequirement]
+        """Create the installation order.
+
+        The installation order is topological - requirements are installed
+        before the requiring thing. We break cycles at an arbitrary point,
+        and make no other guarantees.
+        """
+        # The current implementation, which we may change at any point
+        # installs the user specified things in the order given, except when
+        # dependencies must come earlier to achieve topological order.
+        order = []
+        ordered_reqs = set()  # type: Set[InstallRequirement]
+
+        def schedule(req):
+            if req.satisfied_by or req in ordered_reqs:
+                return
+            if req.constraint:
+                return
+            ordered_reqs.add(req)
+            for dep in self._discovered_dependencies[req.name]:
+                schedule(dep)
+            order.append(req)
+
+        for install_req in req_set.requirements.values():
+            schedule(install_req)
+        return order
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/base.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/base.py
new file mode 100644
index 0000000..7c09cd7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/base.py
@@ -0,0 +1,117 @@
+from pip._vendor.packaging.specifiers import SpecifierSet
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.hashes import Hashes
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import FrozenSet, Iterable, Optional, Tuple
+
+    from pip._vendor.packaging.version import _BaseVersion
+
+    from pip._internal.models.link import Link
+
+    CandidateLookup = Tuple[
+        Optional["Candidate"],
+        Optional[InstallRequirement],
+    ]
+
+
+def format_name(project, extras):
+    # type: (str, FrozenSet[str]) -> str
+    if not extras:
+        return project
+    canonical_extras = sorted(canonicalize_name(e) for e in extras)
+    return "{}[{}]".format(project, ",".join(canonical_extras))
+
+
+class Constraint(object):
+    def __init__(self, specifier, hashes):
+        # type: (SpecifierSet, Hashes) -> None
+        self.specifier = specifier
+        self.hashes = hashes
+
+    @classmethod
+    def empty(cls):
+        # type: () -> Constraint
+        return Constraint(SpecifierSet(), Hashes())
+
+    @classmethod
+    def from_ireq(cls, ireq):
+        # type: (InstallRequirement) -> Constraint
+        return Constraint(ireq.specifier, ireq.hashes(trust_internet=False))
+
+    def __nonzero__(self):
+        # type: () -> bool
+        return bool(self.specifier) or bool(self.hashes)
+
+    def __bool__(self):
+        # type: () -> bool
+        return self.__nonzero__()
+
+    def __and__(self, other):
+        # type: (InstallRequirement) -> Constraint
+        if not isinstance(other, InstallRequirement):
+            return NotImplemented
+        specifier = self.specifier & other.specifier
+        hashes = self.hashes & other.hashes(trust_internet=False)
+        return Constraint(specifier, hashes)
+
+
+class Requirement(object):
+    @property
+    def name(self):
+        # type: () -> str
+        raise NotImplementedError("Subclass should override")
+
+    def is_satisfied_by(self, candidate):
+        # type: (Candidate) -> bool
+        return False
+
+    def get_candidate_lookup(self):
+        # type: () -> CandidateLookup
+        raise NotImplementedError("Subclass should override")
+
+    def format_for_error(self):
+        # type: () -> str
+        raise NotImplementedError("Subclass should override")
+
+
+class Candidate(object):
+    @property
+    def name(self):
+        # type: () -> str
+        raise NotImplementedError("Override in subclass")
+
+    @property
+    def version(self):
+        # type: () -> _BaseVersion
+        raise NotImplementedError("Override in subclass")
+
+    @property
+    def is_installed(self):
+        # type: () -> bool
+        raise NotImplementedError("Override in subclass")
+
+    @property
+    def is_editable(self):
+        # type: () -> bool
+        raise NotImplementedError("Override in subclass")
+
+    @property
+    def source_link(self):
+        # type: () -> Optional[Link]
+        raise NotImplementedError("Override in subclass")
+
+    def iter_dependencies(self, with_requires):
+        # type: (bool) -> Iterable[Optional[Requirement]]
+        raise NotImplementedError("Override in subclass")
+
+    def get_install_requirement(self):
+        # type: () -> Optional[InstallRequirement]
+        raise NotImplementedError("Override in subclass")
+
+    def format_for_error(self):
+        # type: () -> str
+        raise NotImplementedError("Subclass should override")
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/candidates.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/candidates.py
new file mode 100644
index 0000000..8b39d2d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/candidates.py
@@ -0,0 +1,594 @@
+import logging
+import sys
+
+from pip._vendor.contextlib2 import suppress
+from pip._vendor.packaging.specifiers import InvalidSpecifier, SpecifierSet
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.packaging.version import Version
+
+from pip._internal.exceptions import HashError, MetadataInconsistent
+from pip._internal.network.lazy_wheel import (
+    HTTPRangeRequestUnsupported,
+    dist_from_wheel_url,
+)
+from pip._internal.req.constructors import (
+    install_req_from_editable,
+    install_req_from_line,
+)
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import dist_is_editable, normalize_version_info
+from pip._internal.utils.packaging import get_requires_python
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+from .base import Candidate, format_name
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, FrozenSet, Iterable, Optional, Tuple, Union
+
+    from pip._vendor.packaging.version import _BaseVersion
+    from pip._vendor.pkg_resources import Distribution
+
+    from pip._internal.distributions import AbstractDistribution
+    from pip._internal.models.link import Link
+
+    from .base import Requirement
+    from .factory import Factory
+
+    BaseCandidate = Union[
+        "AlreadyInstalledCandidate",
+        "EditableCandidate",
+        "LinkCandidate",
+    ]
+
+
+logger = logging.getLogger(__name__)
+
+
+def make_install_req_from_link(link, template):
+    # type: (Link, InstallRequirement) -> InstallRequirement
+    assert not template.editable, "template is editable"
+    if template.req:
+        line = str(template.req)
+    else:
+        line = link.url
+    ireq = install_req_from_line(
+        line,
+        user_supplied=template.user_supplied,
+        comes_from=template.comes_from,
+        use_pep517=template.use_pep517,
+        isolated=template.isolated,
+        constraint=template.constraint,
+        options=dict(
+            install_options=template.install_options,
+            global_options=template.global_options,
+            hashes=template.hash_options
+        ),
+    )
+    ireq.original_link = template.original_link
+    ireq.link = link
+    return ireq
+
+
+def make_install_req_from_editable(link, template):
+    # type: (Link, InstallRequirement) -> InstallRequirement
+    assert template.editable, "template not editable"
+    return install_req_from_editable(
+        link.url,
+        user_supplied=template.user_supplied,
+        comes_from=template.comes_from,
+        use_pep517=template.use_pep517,
+        isolated=template.isolated,
+        constraint=template.constraint,
+        options=dict(
+            install_options=template.install_options,
+            global_options=template.global_options,
+            hashes=template.hash_options
+        ),
+    )
+
+
+def make_install_req_from_dist(dist, template):
+    # type: (Distribution, InstallRequirement) -> InstallRequirement
+    project_name = canonicalize_name(dist.project_name)
+    if template.req:
+        line = str(template.req)
+    elif template.link:
+        line = "{} @ {}".format(project_name, template.link.url)
+    else:
+        line = "{}=={}".format(project_name, dist.parsed_version)
+    ireq = install_req_from_line(
+        line,
+        user_supplied=template.user_supplied,
+        comes_from=template.comes_from,
+        use_pep517=template.use_pep517,
+        isolated=template.isolated,
+        constraint=template.constraint,
+        options=dict(
+            install_options=template.install_options,
+            global_options=template.global_options,
+            hashes=template.hash_options
+        ),
+    )
+    ireq.satisfied_by = dist
+    return ireq
+
+
+class _InstallRequirementBackedCandidate(Candidate):
+    """A candidate backed by an ``InstallRequirement``.
+
+    This represents a package request with the target not being already
+    in the environment, and needs to be fetched and installed. The backing
+    ``InstallRequirement`` is responsible for most of the leg work; this
+    class exposes appropriate information to the resolver.
+
+    :param link: The link passed to the ``InstallRequirement``. The backing
+        ``InstallRequirement`` will use this link to fetch the distribution.
+    :param source_link: The link this candidate "originates" from. This is
+        different from ``link`` when the link is found in the wheel cache.
+        ``link`` would point to the wheel cache, while this points to the
+        found remote link (e.g. from pypi.org).
+    """
+    is_installed = False
+
+    def __init__(
+        self,
+        link,          # type: Link
+        source_link,   # type: Link
+        ireq,          # type: InstallRequirement
+        factory,       # type: Factory
+        name=None,     # type: Optional[str]
+        version=None,  # type: Optional[_BaseVersion]
+    ):
+        # type: (...) -> None
+        self._link = link
+        self._source_link = source_link
+        self._factory = factory
+        self._ireq = ireq
+        self._name = name
+        self._version = version
+        self._dist = None  # type: Optional[Distribution]
+        self._prepared = False
+
+    def __repr__(self):
+        # type: () -> str
+        return "{class_name}({link!r})".format(
+            class_name=self.__class__.__name__,
+            link=str(self._link),
+        )
+
+    def __hash__(self):
+        # type: () -> int
+        return hash((self.__class__, self._link))
+
+    def __eq__(self, other):
+        # type: (Any) -> bool
+        if isinstance(other, self.__class__):
+            return self._link == other._link
+        return False
+
+    # Needed for Python 2, which does not implement this by default
+    def __ne__(self, other):
+        # type: (Any) -> bool
+        return not self.__eq__(other)
+
+    @property
+    def source_link(self):
+        # type: () -> Optional[Link]
+        return self._source_link
+
+    @property
+    def name(self):
+        # type: () -> str
+        """The normalised name of the project the candidate refers to"""
+        if self._name is None:
+            self._name = canonicalize_name(self.dist.project_name)
+        return self._name
+
+    @property
+    def version(self):
+        # type: () -> _BaseVersion
+        if self._version is None:
+            self._version = self.dist.parsed_version
+        return self._version
+
+    def format_for_error(self):
+        # type: () -> str
+        return "{} {} (from {})".format(
+            self.name,
+            self.version,
+            self._link.file_path if self._link.is_file else self._link
+        )
+
+    def _prepare_abstract_distribution(self):
+        # type: () -> AbstractDistribution
+        raise NotImplementedError("Override in subclass")
+
+    def _check_metadata_consistency(self):
+        # type: () -> None
+        """Check for consistency of project name and version of dist."""
+        # TODO: (Longer term) Rather than abort, reject this candidate
+        #       and backtrack. This would need resolvelib support.
+        dist = self._dist  # type: Distribution
+        name = canonicalize_name(dist.project_name)
+        if self._name is not None and self._name != name:
+            raise MetadataInconsistent(self._ireq, "name", dist.project_name)
+        version = dist.parsed_version
+        if self._version is not None and self._version != version:
+            raise MetadataInconsistent(self._ireq, "version", dist.version)
+
+    def _prepare(self):
+        # type: () -> None
+        if self._prepared:
+            return
+        try:
+            abstract_dist = self._prepare_abstract_distribution()
+        except HashError as e:
+            e.req = self._ireq
+            raise
+
+        self._dist = abstract_dist.get_pkg_resources_distribution()
+        assert self._dist is not None, "Distribution already installed"
+        self._check_metadata_consistency()
+        self._prepared = True
+
+    def _fetch_metadata(self):
+        # type: () -> None
+        """Fetch metadata, using lazy wheel if possible."""
+        preparer = self._factory.preparer
+        use_lazy_wheel = self._factory.use_lazy_wheel
+        remote_wheel = self._link.is_wheel and not self._link.is_file
+        if use_lazy_wheel and remote_wheel and not preparer.require_hashes:
+            assert self._name is not None
+            logger.info('Collecting %s', self._ireq.req or self._ireq)
+            # If HTTPRangeRequestUnsupported is raised, fallback silently.
+            with indent_log(), suppress(HTTPRangeRequestUnsupported):
+                logger.info(
+                    'Obtaining dependency information from %s %s',
+                    self._name, self._version,
+                )
+                url = self._link.url.split('#', 1)[0]
+                session = preparer.downloader._session
+                self._dist = dist_from_wheel_url(self._name, url, session)
+                self._check_metadata_consistency()
+        if self._dist is None:
+            self._prepare()
+
+    @property
+    def dist(self):
+        # type: () -> Distribution
+        if self._dist is None:
+            self._fetch_metadata()
+        return self._dist
+
+    def _get_requires_python_dependency(self):
+        # type: () -> Optional[Requirement]
+        requires_python = get_requires_python(self.dist)
+        if requires_python is None:
+            return None
+        try:
+            spec = SpecifierSet(requires_python)
+        except InvalidSpecifier as e:
+            message = "Package %r has an invalid Requires-Python: %s"
+            logger.warning(message, self.name, e)
+            return None
+        return self._factory.make_requires_python_requirement(spec)
+
+    def iter_dependencies(self, with_requires):
+        # type: (bool) -> Iterable[Optional[Requirement]]
+        requires = self.dist.requires() if with_requires else ()
+        for r in requires:
+            yield self._factory.make_requirement_from_spec(str(r), self._ireq)
+        yield self._get_requires_python_dependency()
+
+    def get_install_requirement(self):
+        # type: () -> Optional[InstallRequirement]
+        self._prepare()
+        return self._ireq
+
+
+class LinkCandidate(_InstallRequirementBackedCandidate):
+    is_editable = False
+
+    def __init__(
+        self,
+        link,          # type: Link
+        template,        # type: InstallRequirement
+        factory,       # type: Factory
+        name=None,     # type: Optional[str]
+        version=None,  # type: Optional[_BaseVersion]
+    ):
+        # type: (...) -> None
+        source_link = link
+        cache_entry = factory.get_wheel_cache_entry(link, name)
+        if cache_entry is not None:
+            logger.debug("Using cached wheel link: %s", cache_entry.link)
+            link = cache_entry.link
+        ireq = make_install_req_from_link(link, template)
+
+        if (cache_entry is not None and
+                cache_entry.persistent and
+                template.link is template.original_link):
+            ireq.original_link_is_in_wheel_cache = True
+
+        super(LinkCandidate, self).__init__(
+            link=link,
+            source_link=source_link,
+            ireq=ireq,
+            factory=factory,
+            name=name,
+            version=version,
+        )
+
+    def _prepare_abstract_distribution(self):
+        # type: () -> AbstractDistribution
+        return self._factory.preparer.prepare_linked_requirement(
+            self._ireq, parallel_builds=True,
+        )
+
+
+class EditableCandidate(_InstallRequirementBackedCandidate):
+    is_editable = True
+
+    def __init__(
+        self,
+        link,          # type: Link
+        template,        # type: InstallRequirement
+        factory,       # type: Factory
+        name=None,     # type: Optional[str]
+        version=None,  # type: Optional[_BaseVersion]
+    ):
+        # type: (...) -> None
+        super(EditableCandidate, self).__init__(
+            link=link,
+            source_link=link,
+            ireq=make_install_req_from_editable(link, template),
+            factory=factory,
+            name=name,
+            version=version,
+        )
+
+    def _prepare_abstract_distribution(self):
+        # type: () -> AbstractDistribution
+        return self._factory.preparer.prepare_editable_requirement(self._ireq)
+
+
+class AlreadyInstalledCandidate(Candidate):
+    is_installed = True
+    source_link = None
+
+    def __init__(
+        self,
+        dist,  # type: Distribution
+        template,  # type: InstallRequirement
+        factory,  # type: Factory
+    ):
+        # type: (...) -> None
+        self.dist = dist
+        self._ireq = make_install_req_from_dist(dist, template)
+        self._factory = factory
+
+        # This is just logging some messages, so we can do it eagerly.
+        # The returned dist would be exactly the same as self.dist because we
+        # set satisfied_by in make_install_req_from_dist.
+        # TODO: Supply reason based on force_reinstall and upgrade_strategy.
+        skip_reason = "already satisfied"
+        factory.preparer.prepare_installed_requirement(self._ireq, skip_reason)
+
+    def __repr__(self):
+        # type: () -> str
+        return "{class_name}({distribution!r})".format(
+            class_name=self.__class__.__name__,
+            distribution=self.dist,
+        )
+
+    def __hash__(self):
+        # type: () -> int
+        return hash((self.__class__, self.name, self.version))
+
+    def __eq__(self, other):
+        # type: (Any) -> bool
+        if isinstance(other, self.__class__):
+            return self.name == other.name and self.version == other.version
+        return False
+
+    # Needed for Python 2, which does not implement this by default
+    def __ne__(self, other):
+        # type: (Any) -> bool
+        return not self.__eq__(other)
+
+    @property
+    def name(self):
+        # type: () -> str
+        return canonicalize_name(self.dist.project_name)
+
+    @property
+    def version(self):
+        # type: () -> _BaseVersion
+        return self.dist.parsed_version
+
+    @property
+    def is_editable(self):
+        # type: () -> bool
+        return dist_is_editable(self.dist)
+
+    def format_for_error(self):
+        # type: () -> str
+        return "{} {} (Installed)".format(self.name, self.version)
+
+    def iter_dependencies(self, with_requires):
+        # type: (bool) -> Iterable[Optional[Requirement]]
+        if not with_requires:
+            return
+        for r in self.dist.requires():
+            yield self._factory.make_requirement_from_spec(str(r), self._ireq)
+
+    def get_install_requirement(self):
+        # type: () -> Optional[InstallRequirement]
+        return None
+
+
+class ExtrasCandidate(Candidate):
+    """A candidate that has 'extras', indicating additional dependencies.
+
+    Requirements can be for a project with dependencies, something like
+    foo[extra].  The extras don't affect the project/version being installed
+    directly, but indicate that we need additional dependencies. We model that
+    by having an artificial ExtrasCandidate that wraps the "base" candidate.
+
+    The ExtrasCandidate differs from the base in the following ways:
+
+    1. It has a unique name, of the form foo[extra]. This causes the resolver
+       to treat it as a separate node in the dependency graph.
+    2. When we're getting the candidate's dependencies,
+       a) We specify that we want the extra dependencies as well.
+       b) We add a dependency on the base candidate.
+          See below for why this is needed.
+    3. We return None for the underlying InstallRequirement, as the base
+       candidate will provide it, and we don't want to end up with duplicates.
+
+    The dependency on the base candidate is needed so that the resolver can't
+    decide that it should recommend foo[extra1] version 1.0 and foo[extra2]
+    version 2.0. Having those candidates depend on foo=1.0 and foo=2.0
+    respectively forces the resolver to recognise that this is a conflict.
+    """
+    def __init__(
+        self,
+        base,  # type: BaseCandidate
+        extras,  # type: FrozenSet[str]
+    ):
+        # type: (...) -> None
+        self.base = base
+        self.extras = extras
+
+    def __repr__(self):
+        # type: () -> str
+        return "{class_name}(base={base!r}, extras={extras!r})".format(
+            class_name=self.__class__.__name__,
+            base=self.base,
+            extras=self.extras,
+        )
+
+    def __hash__(self):
+        # type: () -> int
+        return hash((self.base, self.extras))
+
+    def __eq__(self, other):
+        # type: (Any) -> bool
+        if isinstance(other, self.__class__):
+            return self.base == other.base and self.extras == other.extras
+        return False
+
+    # Needed for Python 2, which does not implement this by default
+    def __ne__(self, other):
+        # type: (Any) -> bool
+        return not self.__eq__(other)
+
+    @property
+    def name(self):
+        # type: () -> str
+        """The normalised name of the project the candidate refers to"""
+        return format_name(self.base.name, self.extras)
+
+    @property
+    def version(self):
+        # type: () -> _BaseVersion
+        return self.base.version
+
+    def format_for_error(self):
+        # type: () -> str
+        return "{} [{}]".format(
+            self.base.format_for_error(),
+            ", ".join(sorted(self.extras))
+        )
+
+    @property
+    def is_installed(self):
+        # type: () -> bool
+        return self.base.is_installed
+
+    @property
+    def is_editable(self):
+        # type: () -> bool
+        return self.base.is_editable
+
+    @property
+    def source_link(self):
+        # type: () -> Optional[Link]
+        return self.base.source_link
+
+    def iter_dependencies(self, with_requires):
+        # type: (bool) -> Iterable[Optional[Requirement]]
+        factory = self.base._factory
+
+        # Add a dependency on the exact base
+        # (See note 2b in the class docstring)
+        yield factory.make_requirement_from_candidate(self.base)
+        if not with_requires:
+            return
+
+        # The user may have specified extras that the candidate doesn't
+        # support. We ignore any unsupported extras here.
+        valid_extras = self.extras.intersection(self.base.dist.extras)
+        invalid_extras = self.extras.difference(self.base.dist.extras)
+        for extra in sorted(invalid_extras):
+            logger.warning(
+                "%s %s does not provide the extra '%s'",
+                self.base.name,
+                self.version,
+                extra
+            )
+
+        for r in self.base.dist.requires(valid_extras):
+            requirement = factory.make_requirement_from_spec(
+                str(r), self.base._ireq, valid_extras,
+            )
+            if requirement:
+                yield requirement
+
+    def get_install_requirement(self):
+        # type: () -> Optional[InstallRequirement]
+        # We don't return anything here, because we always
+        # depend on the base candidate, and we'll get the
+        # install requirement from that.
+        return None
+
+
+class RequiresPythonCandidate(Candidate):
+    is_installed = False
+    source_link = None
+
+    def __init__(self, py_version_info):
+        # type: (Optional[Tuple[int, ...]]) -> None
+        if py_version_info is not None:
+            version_info = normalize_version_info(py_version_info)
+        else:
+            version_info = sys.version_info[:3]
+        self._version = Version(".".join(str(c) for c in version_info))
+
+    # We don't need to implement __eq__() and __ne__() since there is always
+    # only one RequiresPythonCandidate in a resolution, i.e. the host Python.
+    # The built-in object.__eq__() and object.__ne__() do exactly what we want.
+
+    @property
+    def name(self):
+        # type: () -> str
+        # Avoid conflicting with the PyPI package "Python".
+        return "<Python from Requires-Python>"
+
+    @property
+    def version(self):
+        # type: () -> _BaseVersion
+        return self._version
+
+    def format_for_error(self):
+        # type: () -> str
+        return "Python {}".format(self.version)
+
+    def iter_dependencies(self, with_requires):
+        # type: (bool) -> Iterable[Optional[Requirement]]
+        return ()
+
+    def get_install_requirement(self):
+        # type: () -> Optional[InstallRequirement]
+        return None
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/factory.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/factory.py
new file mode 100644
index 0000000..8813ab0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/factory.py
@@ -0,0 +1,461 @@
+import logging
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.exceptions import (
+    DistributionNotFound,
+    InstallationError,
+    UnsupportedPythonVersion,
+    UnsupportedWheel,
+)
+from pip._internal.models.wheel import Wheel
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.compatibility_tags import get_supported
+from pip._internal.utils.hashes import Hashes
+from pip._internal.utils.misc import (
+    dist_in_site_packages,
+    dist_in_usersite,
+    get_installed_distributions,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+from .base import Constraint
+from .candidates import (
+    AlreadyInstalledCandidate,
+    EditableCandidate,
+    ExtrasCandidate,
+    LinkCandidate,
+    RequiresPythonCandidate,
+)
+from .found_candidates import FoundCandidates
+from .requirements import (
+    ExplicitRequirement,
+    RequiresPythonRequirement,
+    SpecifierRequirement,
+)
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        FrozenSet,
+        Dict,
+        Iterable,
+        Iterator,
+        List,
+        Optional,
+        Sequence,
+        Set,
+        Tuple,
+        TypeVar,
+    )
+
+    from pip._vendor.packaging.specifiers import SpecifierSet
+    from pip._vendor.packaging.version import _BaseVersion
+    from pip._vendor.pkg_resources import Distribution
+    from pip._vendor.resolvelib import ResolutionImpossible
+
+    from pip._internal.cache import CacheEntry, WheelCache
+    from pip._internal.index.package_finder import PackageFinder
+    from pip._internal.models.link import Link
+    from pip._internal.operations.prepare import RequirementPreparer
+    from pip._internal.resolution.base import InstallRequirementProvider
+
+    from .base import Candidate, Requirement
+    from .candidates import BaseCandidate
+
+    C = TypeVar("C")
+    Cache = Dict[Link, C]
+    VersionCandidates = Dict[_BaseVersion, Candidate]
+
+
+logger = logging.getLogger(__name__)
+
+
+class Factory(object):
+    def __init__(
+        self,
+        finder,  # type: PackageFinder
+        preparer,  # type: RequirementPreparer
+        make_install_req,  # type: InstallRequirementProvider
+        wheel_cache,  # type: Optional[WheelCache]
+        use_user_site,  # type: bool
+        force_reinstall,  # type: bool
+        ignore_installed,  # type: bool
+        ignore_requires_python,  # type: bool
+        py_version_info=None,  # type: Optional[Tuple[int, ...]]
+        lazy_wheel=False,  # type: bool
+    ):
+        # type: (...) -> None
+        self._finder = finder
+        self.preparer = preparer
+        self._wheel_cache = wheel_cache
+        self._python_candidate = RequiresPythonCandidate(py_version_info)
+        self._make_install_req_from_spec = make_install_req
+        self._use_user_site = use_user_site
+        self._force_reinstall = force_reinstall
+        self._ignore_requires_python = ignore_requires_python
+        self.use_lazy_wheel = lazy_wheel
+
+        self._link_candidate_cache = {}  # type: Cache[LinkCandidate]
+        self._editable_candidate_cache = {}  # type: Cache[EditableCandidate]
+
+        if not ignore_installed:
+            self._installed_dists = {
+                canonicalize_name(dist.project_name): dist
+                for dist in get_installed_distributions(local_only=False)
+            }
+        else:
+            self._installed_dists = {}
+
+    @property
+    def force_reinstall(self):
+        # type: () -> bool
+        return self._force_reinstall
+
+    def _make_candidate_from_dist(
+        self,
+        dist,  # type: Distribution
+        extras,  # type: FrozenSet[str]
+        template,  # type: InstallRequirement
+    ):
+        # type: (...) -> Candidate
+        base = AlreadyInstalledCandidate(dist, template, factory=self)
+        if extras:
+            return ExtrasCandidate(base, extras)
+        return base
+
+    def _make_candidate_from_link(
+        self,
+        link,  # type: Link
+        extras,  # type: FrozenSet[str]
+        template,  # type: InstallRequirement
+        name,  # type: Optional[str]
+        version,  # type: Optional[_BaseVersion]
+    ):
+        # type: (...) -> Candidate
+        # TODO: Check already installed candidate, and use it if the link and
+        # editable flag match.
+        if template.editable:
+            if link not in self._editable_candidate_cache:
+                self._editable_candidate_cache[link] = EditableCandidate(
+                    link, template, factory=self, name=name, version=version,
+                )
+            base = self._editable_candidate_cache[link]  # type: BaseCandidate
+        else:
+            if link not in self._link_candidate_cache:
+                self._link_candidate_cache[link] = LinkCandidate(
+                    link, template, factory=self, name=name, version=version,
+                )
+            base = self._link_candidate_cache[link]
+        if extras:
+            return ExtrasCandidate(base, extras)
+        return base
+
+    def _iter_found_candidates(
+        self,
+        ireqs,  # type: Sequence[InstallRequirement]
+        specifier,  # type: SpecifierSet
+        hashes,  # type: Hashes
+        prefers_installed,  # type: bool
+    ):
+        # type: (...) -> Iterable[Candidate]
+        if not ireqs:
+            return ()
+
+        # The InstallRequirement implementation requires us to give it a
+        # "template". Here we just choose the first requirement to represent
+        # all of them.
+        # Hopefully the Project model can correct this mismatch in the future.
+        template = ireqs[0]
+        name = canonicalize_name(template.req.name)
+
+        extras = frozenset()  # type: FrozenSet[str]
+        for ireq in ireqs:
+            specifier &= ireq.req.specifier
+            hashes &= ireq.hashes(trust_internet=False)
+            extras |= frozenset(ireq.extras)
+
+        # Get the installed version, if it matches, unless the user
+        # specified `--force-reinstall`, when we want the version from
+        # the index instead.
+        installed_candidate = None
+        if not self._force_reinstall and name in self._installed_dists:
+            installed_dist = self._installed_dists[name]
+            if specifier.contains(installed_dist.version, prereleases=True):
+                installed_candidate = self._make_candidate_from_dist(
+                    dist=installed_dist,
+                    extras=extras,
+                    template=template,
+                )
+
+        def iter_index_candidates():
+            # type: () -> Iterator[Candidate]
+            result = self._finder.find_best_candidate(
+                project_name=name,
+                specifier=specifier,
+                hashes=hashes,
+            )
+            # PackageFinder returns earlier versions first, so we reverse.
+            for ican in reversed(list(result.iter_applicable())):
+                yield self._make_candidate_from_link(
+                    link=ican.link,
+                    extras=extras,
+                    template=template,
+                    name=name,
+                    version=ican.version,
+                )
+
+        return FoundCandidates(
+            iter_index_candidates,
+            installed_candidate,
+            prefers_installed,
+        )
+
+    def find_candidates(
+        self,
+        requirements,  # type: Sequence[Requirement]
+        constraint,  # type: Constraint
+        prefers_installed,  # type: bool
+    ):
+        # type: (...) -> Iterable[Candidate]
+        explicit_candidates = set()  # type: Set[Candidate]
+        ireqs = []  # type: List[InstallRequirement]
+        for req in requirements:
+            cand, ireq = req.get_candidate_lookup()
+            if cand is not None:
+                explicit_candidates.add(cand)
+            if ireq is not None:
+                ireqs.append(ireq)
+
+        # If none of the requirements want an explicit candidate, we can ask
+        # the finder for candidates.
+        if not explicit_candidates:
+            return self._iter_found_candidates(
+                ireqs,
+                constraint.specifier,
+                constraint.hashes,
+                prefers_installed,
+            )
+
+        if constraint:
+            name = explicit_candidates.pop().name
+            raise InstallationError(
+                "Could not satisfy constraints for {!r}: installation from "
+                "path or url cannot be constrained to a version".format(name)
+            )
+
+        return (
+            c for c in explicit_candidates
+            if all(req.is_satisfied_by(c) for req in requirements)
+        )
+
+    def make_requirement_from_install_req(self, ireq, requested_extras):
+        # type: (InstallRequirement, Iterable[str]) -> Optional[Requirement]
+        if not ireq.match_markers(requested_extras):
+            logger.info(
+                "Ignoring %s: markers '%s' don't match your environment",
+                ireq.name, ireq.markers,
+            )
+            return None
+        if not ireq.link:
+            return SpecifierRequirement(ireq)
+        if ireq.link.is_wheel:
+            wheel = Wheel(ireq.link.filename)
+            if not wheel.supported(self._finder.target_python.get_tags()):
+                msg = "{} is not a supported wheel on this platform.".format(
+                    wheel.filename,
+                )
+                raise UnsupportedWheel(msg)
+        cand = self._make_candidate_from_link(
+            ireq.link,
+            extras=frozenset(ireq.extras),
+            template=ireq,
+            name=canonicalize_name(ireq.name) if ireq.name else None,
+            version=None,
+        )
+        return self.make_requirement_from_candidate(cand)
+
+    def make_requirement_from_candidate(self, candidate):
+        # type: (Candidate) -> ExplicitRequirement
+        return ExplicitRequirement(candidate)
+
+    def make_requirement_from_spec(
+        self,
+        specifier,  # type: str
+        comes_from,  # type: InstallRequirement
+        requested_extras=(),  # type: Iterable[str]
+    ):
+        # type: (...) -> Optional[Requirement]
+        ireq = self._make_install_req_from_spec(specifier, comes_from)
+        return self.make_requirement_from_install_req(ireq, requested_extras)
+
+    def make_requires_python_requirement(self, specifier):
+        # type: (Optional[SpecifierSet]) -> Optional[Requirement]
+        if self._ignore_requires_python or specifier is None:
+            return None
+        return RequiresPythonRequirement(specifier, self._python_candidate)
+
+    def get_wheel_cache_entry(self, link, name):
+        # type: (Link, Optional[str]) -> Optional[CacheEntry]
+        """Look up the link in the wheel cache.
+
+        If ``preparer.require_hashes`` is True, don't use the wheel cache,
+        because cached wheels, always built locally, have different hashes
+        than the files downloaded from the index server and thus throw false
+        hash mismatches. Furthermore, cached wheels at present have
+        nondeterministic contents due to file modification times.
+        """
+        if self._wheel_cache is None or self.preparer.require_hashes:
+            return None
+        return self._wheel_cache.get_cache_entry(
+            link=link,
+            package_name=name,
+            supported_tags=get_supported(),
+        )
+
+    def get_dist_to_uninstall(self, candidate):
+        # type: (Candidate) -> Optional[Distribution]
+        # TODO: Are there more cases this needs to return True? Editable?
+        dist = self._installed_dists.get(candidate.name)
+        if dist is None:  # Not installed, no uninstallation required.
+            return None
+
+        # We're installing into global site. The current installation must
+        # be uninstalled, no matter it's in global or user site, because the
+        # user site installation has precedence over global.
+        if not self._use_user_site:
+            return dist
+
+        # We're installing into user site. Remove the user site installation.
+        if dist_in_usersite(dist):
+            return dist
+
+        # We're installing into user site, but the installed incompatible
+        # package is in global site. We can't uninstall that, and would let
+        # the new user installation to "shadow" it. But shadowing won't work
+        # in virtual environments, so we error out.
+        if running_under_virtualenv() and dist_in_site_packages(dist):
+            raise InstallationError(
+                "Will not install to the user site because it will "
+                "lack sys.path precedence to {} in {}".format(
+                    dist.project_name, dist.location,
+                )
+            )
+        return None
+
+    def _report_requires_python_error(
+        self,
+        requirement,  # type: RequiresPythonRequirement
+        template,  # type: Candidate
+    ):
+        # type: (...) -> UnsupportedPythonVersion
+        message_format = (
+            "Package {package!r} requires a different Python: "
+            "{version} not in {specifier!r}"
+        )
+        message = message_format.format(
+            package=template.name,
+            version=self._python_candidate.version,
+            specifier=str(requirement.specifier),
+        )
+        return UnsupportedPythonVersion(message)
+
+    def get_installation_error(self, e):
+        # type: (ResolutionImpossible) -> InstallationError
+
+        assert e.causes, "Installation error reported with no cause"
+
+        # If one of the things we can't solve is "we need Python X.Y",
+        # that is what we report.
+        for cause in e.causes:
+            if isinstance(cause.requirement, RequiresPythonRequirement):
+                return self._report_requires_python_error(
+                    cause.requirement,
+                    cause.parent,
+                )
+
+        # Otherwise, we have a set of causes which can't all be satisfied
+        # at once.
+
+        # The simplest case is when we have *one* cause that can't be
+        # satisfied. We just report that case.
+        if len(e.causes) == 1:
+            req, parent = e.causes[0]
+            if parent is None:
+                req_disp = str(req)
+            else:
+                req_disp = '{} (from {})'.format(req, parent.name)
+            logger.critical(
+                "Could not find a version that satisfies the requirement %s",
+                req_disp,
+            )
+            return DistributionNotFound(
+                'No matching distribution found for {}'.format(req)
+            )
+
+        # OK, we now have a list of requirements that can't all be
+        # satisfied at once.
+
+        # A couple of formatting helpers
+        def text_join(parts):
+            # type: (List[str]) -> str
+            if len(parts) == 1:
+                return parts[0]
+
+            return ", ".join(parts[:-1]) + " and " + parts[-1]
+
+        def readable_form(cand):
+            # type: (Candidate) -> str
+            return "{} {}".format(cand.name, cand.version)
+
+        def describe_trigger(parent):
+            # type: (Candidate) -> str
+            ireq = parent.get_install_requirement()
+            if not ireq or not ireq.comes_from:
+                return "{} {}".format(parent.name, parent.version)
+            if isinstance(ireq.comes_from, InstallRequirement):
+                return str(ireq.comes_from.name)
+            return str(ireq.comes_from)
+
+        triggers = []
+        for req, parent in e.causes:
+            if parent is None:
+                # This is a root requirement, so we can report it directly
+                trigger = req.format_for_error()
+            else:
+                trigger = describe_trigger(parent)
+            triggers.append(trigger)
+
+        if triggers:
+            info = text_join(triggers)
+        else:
+            info = "the requested packages"
+
+        msg = "Cannot install {} because these package versions " \
+            "have conflicting dependencies.".format(info)
+        logger.critical(msg)
+        msg = "\nThe conflict is caused by:"
+        for req, parent in e.causes:
+            msg = msg + "\n    "
+            if parent:
+                msg = msg + "{} {} depends on ".format(
+                    parent.name,
+                    parent.version
+                )
+            else:
+                msg = msg + "The user requested "
+            msg = msg + req.format_for_error()
+
+        msg = msg + "\n\n" + \
+            "To fix this you could try to:\n" + \
+            "1. loosen the range of package versions you've specified\n" + \
+            "2. remove package versions to allow pip attempt to solve " + \
+            "the dependency conflict\n"
+
+        logger.info(msg)
+
+        return DistributionNotFound(
+            "ResolutionImpossible: for help visit "
+            "https://pip.pypa.io/en/latest/user_guide/"
+            "#fixing-conflicting-dependencies"
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py
new file mode 100644
index 0000000..a669e89
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py
@@ -0,0 +1,98 @@
+import itertools
+import operator
+
+from pip._vendor.six.moves import collections_abc  # type: ignore
+
+from pip._internal.utils.compat import lru_cache
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Callable, Iterator, Optional, Set
+
+    from pip._vendor.packaging.version import _BaseVersion
+
+    from .base import Candidate
+
+
+def _deduplicated_by_version(candidates):
+    # type: (Iterator[Candidate]) -> Iterator[Candidate]
+    returned = set()  # type: Set[_BaseVersion]
+    for candidate in candidates:
+        if candidate.version in returned:
+            continue
+        returned.add(candidate.version)
+        yield candidate
+
+
+def _insert_installed(installed, others):
+    # type: (Candidate, Iterator[Candidate]) -> Iterator[Candidate]
+    """Iterator for ``FoundCandidates``.
+
+    This iterator is used when the resolver prefers to upgrade an
+    already-installed package. Candidates from index are returned in their
+    normal ordering, except replaced when the version is already installed.
+
+    Since candidates from index are already sorted by reverse version order,
+    `sorted()` here would keep the ordering mostly intact, only shuffling the
+    already-installed candidate into the correct position. We put the already-
+    installed candidate in front of those from the index, so it's put in front
+    after sorting due to Python sorting's stableness guarentee.
+    """
+    candidates = sorted(
+        itertools.chain([installed], others),
+        key=operator.attrgetter("version"),
+        reverse=True,
+    )
+    return iter(candidates)
+
+
+class FoundCandidates(collections_abc.Sequence):
+    """A lazy sequence to provide candidates to the resolver.
+
+    The intended usage is to return this from `find_matches()` so the resolver
+    can iterate through the sequence multiple times, but only access the index
+    page when remote packages are actually needed. This improve performances
+    when suitable candidates are already installed on disk.
+    """
+    def __init__(
+        self,
+        get_others,  # type: Callable[[], Iterator[Candidate]]
+        installed,  # type: Optional[Candidate]
+        prefers_installed,  # type: bool
+    ):
+        self._get_others = get_others
+        self._installed = installed
+        self._prefers_installed = prefers_installed
+
+    def __getitem__(self, index):
+        # type: (int) -> Candidate
+        # Implemented to satisfy the ABC check. This is not needed by the
+        # resolver, and should not be used by the provider either (for
+        # performance reasons).
+        raise NotImplementedError("don't do this")
+
+    def __iter__(self):
+        # type: () -> Iterator[Candidate]
+        if not self._installed:
+            candidates = self._get_others()
+        elif self._prefers_installed:
+            candidates = itertools.chain([self._installed], self._get_others())
+        else:
+            candidates = _insert_installed(self._installed, self._get_others())
+        return _deduplicated_by_version(candidates)
+
+    def __len__(self):
+        # type: () -> int
+        # Implemented to satisfy the ABC check. This is not needed by the
+        # resolver, and should not be used by the provider either (for
+        # performance reasons).
+        raise NotImplementedError("don't do this")
+
+    @lru_cache(maxsize=1)
+    def __bool__(self):
+        # type: () -> bool
+        if self._prefers_installed and self._installed:
+            return True
+        return any(self)
+
+    __nonzero__ = __bool__  # XXX: Python 2.
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/provider.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/provider.py
new file mode 100644
index 0000000..7d679e5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/provider.py
@@ -0,0 +1,112 @@
+from pip._vendor.resolvelib.providers import AbstractProvider
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+from .base import Constraint
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any,
+        Dict,
+        Iterable,
+        Optional,
+        Sequence,
+        Set,
+        Tuple,
+        Union,
+    )
+
+    from .base import Requirement, Candidate
+    from .factory import Factory
+
+# Notes on the relationship between the provider, the factory, and the
+# candidate and requirement classes.
+#
+# The provider is a direct implementation of the resolvelib class. Its role
+# is to deliver the API that resolvelib expects.
+#
+# Rather than work with completely abstract "requirement" and "candidate"
+# concepts as resolvelib does, pip has concrete classes implementing these two
+# ideas. The API of Requirement and Candidate objects are defined in the base
+# classes, but essentially map fairly directly to the equivalent provider
+# methods. In particular, `find_matches` and `is_satisfied_by` are
+# requirement methods, and `get_dependencies` is a candidate method.
+#
+# The factory is the interface to pip's internal mechanisms. It is stateless,
+# and is created by the resolver and held as a property of the provider. It is
+# responsible for creating Requirement and Candidate objects, and provides
+# services to those objects (access to pip's finder and preparer).
+
+
+class PipProvider(AbstractProvider):
+    def __init__(
+        self,
+        factory,  # type: Factory
+        constraints,  # type: Dict[str, Constraint]
+        ignore_dependencies,  # type: bool
+        upgrade_strategy,  # type: str
+        user_requested,  # type: Set[str]
+    ):
+        # type: (...) -> None
+        self._factory = factory
+        self._constraints = constraints
+        self._ignore_dependencies = ignore_dependencies
+        self._upgrade_strategy = upgrade_strategy
+        self._user_requested = user_requested
+
+    def identify(self, dependency):
+        # type: (Union[Requirement, Candidate]) -> str
+        return dependency.name
+
+    def get_preference(
+        self,
+        resolution,  # type: Optional[Candidate]
+        candidates,  # type: Sequence[Candidate]
+        information  # type: Sequence[Tuple[Requirement, Candidate]]
+    ):
+        # type: (...) -> Any
+        transitive = all(parent is not None for _, parent in information)
+        return (transitive, bool(candidates))
+
+    def find_matches(self, requirements):
+        # type: (Sequence[Requirement]) -> Iterable[Candidate]
+        if not requirements:
+            return []
+        name = requirements[0].name
+
+        def _eligible_for_upgrade(name):
+            # type: (str) -> bool
+            """Are upgrades allowed for this project?
+
+            This checks the upgrade strategy, and whether the project was one
+            that the user specified in the command line, in order to decide
+            whether we should upgrade if there's a newer version available.
+
+            (Note that we don't need access to the `--upgrade` flag, because
+            an upgrade strategy of "to-satisfy-only" means that `--upgrade`
+            was not specified).
+            """
+            if self._upgrade_strategy == "eager":
+                return True
+            elif self._upgrade_strategy == "only-if-needed":
+                return (name in self._user_requested)
+            return False
+
+        return self._factory.find_candidates(
+            requirements,
+            constraint=self._constraints.get(name, Constraint.empty()),
+            prefers_installed=(not _eligible_for_upgrade(name)),
+        )
+
+    def is_satisfied_by(self, requirement, candidate):
+        # type: (Requirement, Candidate) -> bool
+        return requirement.is_satisfied_by(candidate)
+
+    def get_dependencies(self, candidate):
+        # type: (Candidate) -> Sequence[Requirement]
+        with_requires = not self._ignore_dependencies
+        return [
+            r
+            for r in candidate.iter_dependencies(with_requires)
+            if r is not None
+        ]
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/requirements.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/requirements.py
new file mode 100644
index 0000000..bc1061f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/requirements.py
@@ -0,0 +1,137 @@
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+from .base import Requirement, format_name
+
+if MYPY_CHECK_RUNNING:
+    from pip._vendor.packaging.specifiers import SpecifierSet
+
+    from pip._internal.req.req_install import InstallRequirement
+
+    from .base import Candidate, CandidateLookup
+
+
+class ExplicitRequirement(Requirement):
+    def __init__(self, candidate):
+        # type: (Candidate) -> None
+        self.candidate = candidate
+
+    def __repr__(self):
+        # type: () -> str
+        return "{class_name}({candidate!r})".format(
+            class_name=self.__class__.__name__,
+            candidate=self.candidate,
+        )
+
+    @property
+    def name(self):
+        # type: () -> str
+        # No need to canonicalise - the candidate did this
+        return self.candidate.name
+
+    def format_for_error(self):
+        # type: () -> str
+        return self.candidate.format_for_error()
+
+    def get_candidate_lookup(self):
+        # type: () -> CandidateLookup
+        return self.candidate, None
+
+    def is_satisfied_by(self, candidate):
+        # type: (Candidate) -> bool
+        return candidate == self.candidate
+
+
+class SpecifierRequirement(Requirement):
+    def __init__(self, ireq):
+        # type: (InstallRequirement) -> None
+        assert ireq.link is None, "This is a link, not a specifier"
+        self._ireq = ireq
+        self._extras = frozenset(ireq.extras)
+
+    def __str__(self):
+        # type: () -> str
+        return str(self._ireq.req)
+
+    def __repr__(self):
+        # type: () -> str
+        return "{class_name}({requirement!r})".format(
+            class_name=self.__class__.__name__,
+            requirement=str(self._ireq.req),
+        )
+
+    @property
+    def name(self):
+        # type: () -> str
+        canonical_name = canonicalize_name(self._ireq.req.name)
+        return format_name(canonical_name, self._extras)
+
+    def format_for_error(self):
+        # type: () -> str
+
+        # Convert comma-separated specifiers into "A, B, ..., F and G"
+        # This makes the specifier a bit more "human readable", without
+        # risking a change in meaning. (Hopefully! Not all edge cases have
+        # been checked)
+        parts = [s.strip() for s in str(self).split(",")]
+        if len(parts) == 0:
+            return ""
+        elif len(parts) == 1:
+            return parts[0]
+
+        return ", ".join(parts[:-1]) + " and " + parts[-1]
+
+    def get_candidate_lookup(self):
+        # type: () -> CandidateLookup
+        return None, self._ireq
+
+    def is_satisfied_by(self, candidate):
+        # type: (Candidate) -> bool
+        assert candidate.name == self.name, \
+            "Internal issue: Candidate is not for this requirement " \
+            " {} vs {}".format(candidate.name, self.name)
+        # We can safely always allow prereleases here since PackageFinder
+        # already implements the prerelease logic, and would have filtered out
+        # prerelease candidates if the user does not expect them.
+        spec = self._ireq.req.specifier
+        return spec.contains(candidate.version, prereleases=True)
+
+
+class RequiresPythonRequirement(Requirement):
+    """A requirement representing Requires-Python metadata.
+    """
+    def __init__(self, specifier, match):
+        # type: (SpecifierSet, Candidate) -> None
+        self.specifier = specifier
+        self._candidate = match
+
+    def __repr__(self):
+        # type: () -> str
+        return "{class_name}({specifier!r})".format(
+            class_name=self.__class__.__name__,
+            specifier=str(self.specifier),
+        )
+
+    @property
+    def name(self):
+        # type: () -> str
+        return self._candidate.name
+
+    def format_for_error(self):
+        # type: () -> str
+        return "Python " + str(self.specifier)
+
+    def get_candidate_lookup(self):
+        # type: () -> CandidateLookup
+        if self.specifier.contains(self._candidate.version, prereleases=True):
+            return self._candidate, None
+        return None, None
+
+    def is_satisfied_by(self, candidate):
+        # type: (Candidate) -> bool
+        assert candidate.name == self._candidate.name, "Not Python candidate"
+        # We can safely always allow prereleases here since PackageFinder
+        # already implements the prerelease logic, and would have filtered out
+        # prerelease candidates if the user does not expect them.
+        return self.specifier.contains(candidate.version, prereleases=True)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/resolver.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/resolver.py
new file mode 100644
index 0000000..449cfea
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/resolution/resolvelib/resolver.py
@@ -0,0 +1,259 @@
+import functools
+import logging
+
+from pip._vendor import six
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.resolvelib import BaseReporter, ResolutionImpossible
+from pip._vendor.resolvelib import Resolver as RLResolver
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.req.req_install import check_invalid_constraint_type
+from pip._internal.req.req_set import RequirementSet
+from pip._internal.resolution.base import BaseResolver
+from pip._internal.resolution.resolvelib.provider import PipProvider
+from pip._internal.utils.misc import dist_is_editable
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+from .base import Constraint
+from .factory import Factory
+
+if MYPY_CHECK_RUNNING:
+    from typing import Dict, List, Optional, Set, Tuple
+
+    from pip._vendor.resolvelib.resolvers import Result
+    from pip._vendor.resolvelib.structs import Graph
+
+    from pip._internal.cache import WheelCache
+    from pip._internal.index.package_finder import PackageFinder
+    from pip._internal.operations.prepare import RequirementPreparer
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.resolution.base import InstallRequirementProvider
+
+
+logger = logging.getLogger(__name__)
+
+
+class Resolver(BaseResolver):
+    _allowed_strategies = {"eager", "only-if-needed", "to-satisfy-only"}
+
+    def __init__(
+        self,
+        preparer,  # type: RequirementPreparer
+        finder,  # type: PackageFinder
+        wheel_cache,  # type: Optional[WheelCache]
+        make_install_req,  # type: InstallRequirementProvider
+        use_user_site,  # type: bool
+        ignore_dependencies,  # type: bool
+        ignore_installed,  # type: bool
+        ignore_requires_python,  # type: bool
+        force_reinstall,  # type: bool
+        upgrade_strategy,  # type: str
+        py_version_info=None,  # type: Optional[Tuple[int, ...]]
+        lazy_wheel=False,  # type: bool
+    ):
+        super(Resolver, self).__init__()
+        if lazy_wheel:
+            logger.warning(
+                'pip is using lazily downloaded wheels using HTTP '
+                'range requests to obtain dependency information. '
+                'This experimental feature is enabled through '
+                '--use-feature=fast-deps and it is not ready for production.'
+            )
+
+        assert upgrade_strategy in self._allowed_strategies
+
+        self.factory = Factory(
+            finder=finder,
+            preparer=preparer,
+            make_install_req=make_install_req,
+            wheel_cache=wheel_cache,
+            use_user_site=use_user_site,
+            force_reinstall=force_reinstall,
+            ignore_installed=ignore_installed,
+            ignore_requires_python=ignore_requires_python,
+            py_version_info=py_version_info,
+            lazy_wheel=lazy_wheel,
+        )
+        self.ignore_dependencies = ignore_dependencies
+        self.upgrade_strategy = upgrade_strategy
+        self._result = None  # type: Optional[Result]
+
+    def resolve(self, root_reqs, check_supported_wheels):
+        # type: (List[InstallRequirement], bool) -> RequirementSet
+
+        constraints = {}  # type: Dict[str, Constraint]
+        user_requested = set()  # type: Set[str]
+        requirements = []
+        for req in root_reqs:
+            if req.constraint:
+                # Ensure we only accept valid constraints
+                problem = check_invalid_constraint_type(req)
+                if problem:
+                    raise InstallationError(problem)
+                if not req.match_markers():
+                    continue
+                name = canonicalize_name(req.name)
+                if name in constraints:
+                    constraints[name] &= req
+                else:
+                    constraints[name] = Constraint.from_ireq(req)
+            else:
+                if req.user_supplied and req.name:
+                    user_requested.add(canonicalize_name(req.name))
+                r = self.factory.make_requirement_from_install_req(
+                    req, requested_extras=(),
+                )
+                if r is not None:
+                    requirements.append(r)
+
+        provider = PipProvider(
+            factory=self.factory,
+            constraints=constraints,
+            ignore_dependencies=self.ignore_dependencies,
+            upgrade_strategy=self.upgrade_strategy,
+            user_requested=user_requested,
+        )
+        reporter = BaseReporter()
+        resolver = RLResolver(provider, reporter)
+
+        try:
+            try_to_avoid_resolution_too_deep = 2000000
+            self._result = resolver.resolve(
+                requirements, max_rounds=try_to_avoid_resolution_too_deep,
+            )
+
+        except ResolutionImpossible as e:
+            error = self.factory.get_installation_error(e)
+            six.raise_from(error, e)
+
+        req_set = RequirementSet(check_supported_wheels=check_supported_wheels)
+        for candidate in self._result.mapping.values():
+            ireq = candidate.get_install_requirement()
+            if ireq is None:
+                continue
+
+            # Check if there is already an installation under the same name,
+            # and set a flag for later stages to uninstall it, if needed.
+            # * There isn't, good -- no uninstalltion needed.
+            # * The --force-reinstall flag is set. Always reinstall.
+            # * The installation is different in version or editable-ness, so
+            #   we need to uninstall it to install the new distribution.
+            # * The installed version is the same as the pending distribution.
+            #   Skip this distrubiton altogether to save work.
+            installed_dist = self.factory.get_dist_to_uninstall(candidate)
+            if installed_dist is None:
+                ireq.should_reinstall = False
+            elif self.factory.force_reinstall:
+                ireq.should_reinstall = True
+            elif installed_dist.parsed_version != candidate.version:
+                ireq.should_reinstall = True
+            elif dist_is_editable(installed_dist) != candidate.is_editable:
+                ireq.should_reinstall = True
+            else:
+                continue
+
+            link = candidate.source_link
+            if link and link.is_yanked:
+                # The reason can contain non-ASCII characters, Unicode
+                # is required for Python 2.
+                msg = (
+                    u'The candidate selected for download or install is a '
+                    u'yanked version: {name!r} candidate (version {version} '
+                    u'at {link})\nReason for being yanked: {reason}'
+                ).format(
+                    name=candidate.name,
+                    version=candidate.version,
+                    link=link,
+                    reason=link.yanked_reason or u'<none given>',
+                )
+                logger.warning(msg)
+
+            req_set.add_named_requirement(ireq)
+
+        return req_set
+
+    def get_installation_order(self, req_set):
+        # type: (RequirementSet) -> List[InstallRequirement]
+        """Get order for installation of requirements in RequirementSet.
+
+        The returned list contains a requirement before another that depends on
+        it. This helps ensure that the environment is kept consistent as they
+        get installed one-by-one.
+
+        The current implementation creates a topological ordering of the
+        dependency graph, while breaking any cycles in the graph at arbitrary
+        points. We make no guarantees about where the cycle would be broken,
+        other than they would be broken.
+        """
+        assert self._result is not None, "must call resolve() first"
+
+        graph = self._result.graph
+        weights = get_topological_weights(graph)
+
+        sorted_items = sorted(
+            req_set.requirements.items(),
+            key=functools.partial(_req_set_item_sorter, weights=weights),
+            reverse=True,
+        )
+        return [ireq for _, ireq in sorted_items]
+
+
+def get_topological_weights(graph):
+    # type: (Graph) -> Dict[Optional[str], int]
+    """Assign weights to each node based on how "deep" they are.
+
+    This implementation may change at any point in the future without prior
+    notice.
+
+    We take the length for the longest path to any node from root, ignoring any
+    paths that contain a single node twice (i.e. cycles). This is done through
+    a depth-first search through the graph, while keeping track of the path to
+    the node.
+
+    Cycles in the graph result would result in node being revisited while also
+    being it's own path. In this case, take no action. This helps ensure we
+    don't get stuck in a cycle.
+
+    When assigning weight, the longer path (i.e. larger length) is preferred.
+    """
+    path = set()  # type: Set[Optional[str]]
+    weights = {}  # type: Dict[Optional[str], int]
+
+    def visit(node):
+        # type: (Optional[str]) -> None
+        if node in path:
+            # We hit a cycle, so we'll break it here.
+            return
+
+        # Time to visit the children!
+        path.add(node)
+        for child in graph.iter_children(node):
+            visit(child)
+        path.remove(node)
+
+        last_known_parent_count = weights.get(node, 0)
+        weights[node] = max(last_known_parent_count, len(path))
+
+    # `None` is guaranteed to be the root node by resolvelib.
+    visit(None)
+
+    # Sanity checks
+    assert weights[None] == 0
+    assert len(weights) == len(graph)
+
+    return weights
+
+
+def _req_set_item_sorter(
+    item,     # type: Tuple[str, InstallRequirement]
+    weights,  # type: Dict[Optional[str], int]
+):
+    # type: (...) -> Tuple[int, str]
+    """Key function used to sort install requirements for installation.
+
+    Based on the "weight" mapping calculated in ``get_installation_order()``.
+    The canonical package name is returned as the second member as a tie-
+    breaker to ensure the result is predictable, which is useful in tests.
+    """
+    name = canonicalize_name(item[0])
+    return weights[name], name
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/self_outdated_check.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/self_outdated_check.py
new file mode 100644
index 0000000..fbd9dfd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/self_outdated_check.py
@@ -0,0 +1,205 @@
+from __future__ import absolute_import
+
+import datetime
+import hashlib
+import json
+import logging
+import os.path
+import sys
+
+from pip._vendor.packaging import version as packaging_version
+from pip._vendor.six import ensure_binary
+
+from pip._internal.index.collector import LinkCollector
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.utils.filesystem import (
+    adjacent_tmp_file,
+    check_path_owner,
+    replace,
+)
+from pip._internal.utils.misc import (
+    ensure_dir,
+    get_distribution,
+    get_installed_version,
+)
+from pip._internal.utils.packaging import get_installer
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    import optparse
+    from typing import Any, Dict, Text, Union
+
+    from pip._internal.network.session import PipSession
+
+
+SELFCHECK_DATE_FMT = "%Y-%m-%dT%H:%M:%SZ"
+
+
+logger = logging.getLogger(__name__)
+
+
+def _get_statefile_name(key):
+    # type: (Union[str, Text]) -> str
+    key_bytes = ensure_binary(key)
+    name = hashlib.sha224(key_bytes).hexdigest()
+    return name
+
+
+class SelfCheckState(object):
+    def __init__(self, cache_dir):
+        # type: (str) -> None
+        self.state = {}  # type: Dict[str, Any]
+        self.statefile_path = None
+
+        # Try to load the existing state
+        if cache_dir:
+            self.statefile_path = os.path.join(
+                cache_dir, "selfcheck", _get_statefile_name(self.key)
+            )
+            try:
+                with open(self.statefile_path) as statefile:
+                    self.state = json.load(statefile)
+            except (IOError, ValueError, KeyError):
+                # Explicitly suppressing exceptions, since we don't want to
+                # error out if the cache file is invalid.
+                pass
+
+    @property
+    def key(self):
+        # type: () -> str
+        return sys.prefix
+
+    def save(self, pypi_version, current_time):
+        # type: (str, datetime.datetime) -> None
+        # If we do not have a path to cache in, don't bother saving.
+        if not self.statefile_path:
+            return
+
+        # Check to make sure that we own the directory
+        if not check_path_owner(os.path.dirname(self.statefile_path)):
+            return
+
+        # Now that we've ensured the directory is owned by this user, we'll go
+        # ahead and make sure that all our directories are created.
+        ensure_dir(os.path.dirname(self.statefile_path))
+
+        state = {
+            # Include the key so it's easy to tell which pip wrote the
+            # file.
+            "key": self.key,
+            "last_check": current_time.strftime(SELFCHECK_DATE_FMT),
+            "pypi_version": pypi_version,
+        }
+
+        text = json.dumps(state, sort_keys=True, separators=(",", ":"))
+
+        with adjacent_tmp_file(self.statefile_path) as f:
+            f.write(ensure_binary(text))
+
+        try:
+            # Since we have a prefix-specific state file, we can just
+            # overwrite whatever is there, no need to check.
+            replace(f.name, self.statefile_path)
+        except OSError:
+            # Best effort.
+            pass
+
+
+def was_installed_by_pip(pkg):
+    # type: (str) -> bool
+    """Checks whether pkg was installed by pip
+
+    This is used not to display the upgrade message when pip is in fact
+    installed by system package manager, such as dnf on Fedora.
+    """
+    dist = get_distribution(pkg)
+    if not dist:
+        return False
+    return "pip" == get_installer(dist)
+
+
+def pip_self_version_check(session, options):
+    # type: (PipSession, optparse.Values) -> None
+    """Check for an update for pip.
+
+    Limit the frequency of checks to once per week. State is stored either in
+    the active virtualenv or in the user's USER_CACHE_DIR keyed off the prefix
+    of the pip script path.
+    """
+    installed_version = get_installed_version("pip")
+    if not installed_version:
+        return
+
+    pip_version = packaging_version.parse(installed_version)
+    pypi_version = None
+
+    try:
+        state = SelfCheckState(cache_dir=options.cache_dir)
+
+        current_time = datetime.datetime.utcnow()
+        # Determine if we need to refresh the state
+        if "last_check" in state.state and "pypi_version" in state.state:
+            last_check = datetime.datetime.strptime(
+                state.state["last_check"],
+                SELFCHECK_DATE_FMT
+            )
+            if (current_time - last_check).total_seconds() < 7 * 24 * 60 * 60:
+                pypi_version = state.state["pypi_version"]
+
+        # Refresh the version if we need to or just see if we need to warn
+        if pypi_version is None:
+            # Lets use PackageFinder to see what the latest pip version is
+            link_collector = LinkCollector.create(
+                session,
+                options=options,
+                suppress_no_index=True,
+            )
+
+            # Pass allow_yanked=False so we don't suggest upgrading to a
+            # yanked version.
+            selection_prefs = SelectionPreferences(
+                allow_yanked=False,
+                allow_all_prereleases=False,  # Explicitly set to False
+            )
+
+            finder = PackageFinder.create(
+                link_collector=link_collector,
+                selection_prefs=selection_prefs,
+            )
+            best_candidate = finder.find_best_candidate("pip").best_candidate
+            if best_candidate is None:
+                return
+            pypi_version = str(best_candidate.version)
+
+            # save that we've performed a check
+            state.save(pypi_version, current_time)
+
+        remote_version = packaging_version.parse(pypi_version)
+
+        local_version_is_older = (
+            pip_version < remote_version and
+            pip_version.base_version != remote_version.base_version and
+            was_installed_by_pip('pip')
+        )
+
+        # Determine if our pypi_version is older
+        if not local_version_is_older:
+            return
+
+        # We cannot tell how the current pip is available in the current
+        # command context, so be pragmatic here and suggest the command
+        # that's always available. This does not accommodate spaces in
+        # `sys.executable`.
+        pip_cmd = "{} -m pip".format(sys.executable)
+        logger.warning(
+            "You are using pip version %s; however, version %s is "
+            "available.\nYou should consider upgrading via the "
+            "'%s install --upgrade pip' command.",
+            pip_version, pypi_version, pip_cmd
+        )
+    except Exception:
+        logger.debug(
+            "There was an error checking the latest version of pip",
+            exc_info=True,
+        )
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/appdirs.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/appdirs.py
new file mode 100644
index 0000000..3989ed3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/appdirs.py
@@ -0,0 +1,44 @@
+"""
+This code wraps the vendored appdirs module to so the return values are
+compatible for the current pip code base.
+
+The intention is to rewrite current usages gradually, keeping the tests pass,
+and eventually drop this after all usages are changed.
+"""
+
+from __future__ import absolute_import
+
+import os
+
+from pip._vendor import appdirs as _appdirs
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List
+
+
+def user_cache_dir(appname):
+    # type: (str) -> str
+    return _appdirs.user_cache_dir(appname, appauthor=False)
+
+
+def user_config_dir(appname, roaming=True):
+    # type: (str, bool) -> str
+    path = _appdirs.user_config_dir(appname, appauthor=False, roaming=roaming)
+    if _appdirs.system == "darwin" and not os.path.isdir(path):
+        path = os.path.expanduser('~/.config/')
+        if appname:
+            path = os.path.join(path, appname)
+    return path
+
+
+# for the discussion regarding site_config_dir locations
+# see <https://github.com/pypa/pip/issues/1733>
+def site_config_dirs(appname):
+    # type: (str) -> List[str]
+    dirval = _appdirs.site_config_dir(appname, appauthor=False, multipath=True)
+    if _appdirs.system not in ["win32", "darwin"]:
+        # always look in /etc directly as well
+        return dirval.split(os.pathsep) + ['/etc']
+    return [dirval]
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/compat.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/compat.py
new file mode 100644
index 0000000..9a2bb78
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/compat.py
@@ -0,0 +1,293 @@
+"""Stuff that differs in different Python versions and platform
+distributions."""
+
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import, division
+
+import codecs
+import functools
+import locale
+import logging
+import os
+import shutil
+import sys
+
+from pip._vendor.six import PY2, text_type
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Callable, Optional, Protocol, Text, Tuple, TypeVar, Union
+
+    # Used in the @lru_cache polyfill.
+    F = TypeVar('F')
+
+    class LruCache(Protocol):
+        def __call__(self, maxsize=None):
+            # type: (Optional[int]) -> Callable[[F], F]
+            raise NotImplementedError
+
+try:
+    import ipaddress
+except ImportError:
+    try:
+        from pip._vendor import ipaddress  # type: ignore
+    except ImportError:
+        import ipaddr as ipaddress  # type: ignore
+        ipaddress.ip_address = ipaddress.IPAddress  # type: ignore
+        ipaddress.ip_network = ipaddress.IPNetwork  # type: ignore
+
+
+__all__ = [
+    "ipaddress", "uses_pycache", "console_to_str",
+    "get_path_uid", "stdlib_pkgs", "WINDOWS", "samefile", "get_terminal_size",
+]
+
+
+logger = logging.getLogger(__name__)
+
+if PY2:
+    import imp
+
+    try:
+        cache_from_source = imp.cache_from_source  # type: ignore
+    except AttributeError:
+        # does not use __pycache__
+        cache_from_source = None
+
+    uses_pycache = cache_from_source is not None
+else:
+    uses_pycache = True
+    from importlib.util import cache_from_source
+
+
+if PY2:
+    # In Python 2.7, backslashreplace exists
+    # but does not support use for decoding.
+    # We implement our own replace handler for this
+    # situation, so that we can consistently use
+    # backslash replacement for all versions.
+    def backslashreplace_decode_fn(err):
+        raw_bytes = (err.object[i] for i in range(err.start, err.end))
+        # Python 2 gave us characters - convert to numeric bytes
+        raw_bytes = (ord(b) for b in raw_bytes)
+        return u"".join(map(u"\\x{:x}".format, raw_bytes)), err.end
+    codecs.register_error(
+        "backslashreplace_decode",
+        backslashreplace_decode_fn,
+    )
+    backslashreplace_decode = "backslashreplace_decode"
+else:
+    backslashreplace_decode = "backslashreplace"
+
+
+def has_tls():
+    # type: () -> bool
+    try:
+        import _ssl  # noqa: F401  # ignore unused
+        return True
+    except ImportError:
+        pass
+
+    from pip._vendor.urllib3.util import IS_PYOPENSSL
+    return IS_PYOPENSSL
+
+
+def str_to_display(data, desc=None):
+    # type: (Union[bytes, Text], Optional[str]) -> Text
+    """
+    For display or logging purposes, convert a bytes object (or text) to
+    text (e.g. unicode in Python 2) safe for output.
+
+    :param desc: An optional phrase describing the input data, for use in
+        the log message if a warning is logged. Defaults to "Bytes object".
+
+    This function should never error out and so can take a best effort
+    approach. It is okay to be lossy if needed since the return value is
+    just for display.
+
+    We assume the data is in the locale preferred encoding. If it won't
+    decode properly, we warn the user but decode as best we can.
+
+    We also ensure that the output can be safely written to standard output
+    without encoding errors.
+    """
+    if isinstance(data, text_type):
+        return data
+
+    # Otherwise, data is a bytes object (str in Python 2).
+    # First, get the encoding we assume. This is the preferred
+    # encoding for the locale, unless that is not found, or
+    # it is ASCII, in which case assume UTF-8
+    encoding = locale.getpreferredencoding()
+    if (not encoding) or codecs.lookup(encoding).name == "ascii":
+        encoding = "utf-8"
+
+    # Now try to decode the data - if we fail, warn the user and
+    # decode with replacement.
+    try:
+        decoded_data = data.decode(encoding)
+    except UnicodeDecodeError:
+        logger.warning(
+            '%s does not appear to be encoded as %s',
+            desc or 'Bytes object',
+            encoding,
+        )
+        decoded_data = data.decode(encoding, errors=backslashreplace_decode)
+
+    # Make sure we can print the output, by encoding it to the output
+    # encoding with replacement of unencodable characters, and then
+    # decoding again.
+    # We use stderr's encoding because it's less likely to be
+    # redirected and if we don't find an encoding we skip this
+    # step (on the assumption that output is wrapped by something
+    # that won't fail).
+    # The double getattr is to deal with the possibility that we're
+    # being called in a situation where sys.__stderr__ doesn't exist,
+    # or doesn't have an encoding attribute. Neither of these cases
+    # should occur in normal pip use, but there's no harm in checking
+    # in case people use pip in (unsupported) unusual situations.
+    output_encoding = getattr(getattr(sys, "__stderr__", None),
+                              "encoding", None)
+
+    if output_encoding:
+        output_encoded = decoded_data.encode(
+            output_encoding,
+            errors="backslashreplace"
+        )
+        decoded_data = output_encoded.decode(output_encoding)
+
+    return decoded_data
+
+
+def console_to_str(data):
+    # type: (bytes) -> Text
+    """Return a string, safe for output, of subprocess output.
+    """
+    return str_to_display(data, desc='Subprocess output')
+
+
+def get_path_uid(path):
+    # type: (str) -> int
+    """
+    Return path's uid.
+
+    Does not follow symlinks:
+        https://github.com/pypa/pip/pull/935#discussion_r5307003
+
+    Placed this function in compat due to differences on AIX and
+    Jython, that should eventually go away.
+
+    :raises OSError: When path is a symlink or can't be read.
+    """
+    if hasattr(os, 'O_NOFOLLOW'):
+        fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW)
+        file_uid = os.fstat(fd).st_uid
+        os.close(fd)
+    else:  # AIX and Jython
+        # WARNING: time of check vulnerability, but best we can do w/o NOFOLLOW
+        if not os.path.islink(path):
+            # older versions of Jython don't have `os.fstat`
+            file_uid = os.stat(path).st_uid
+        else:
+            # raise OSError for parity with os.O_NOFOLLOW above
+            raise OSError(
+                "{} is a symlink; Will not return uid for symlinks".format(
+                    path)
+            )
+    return file_uid
+
+
+def expanduser(path):
+    # type: (str) -> str
+    """
+    Expand ~ and ~user constructions.
+
+    Includes a workaround for https://bugs.python.org/issue14768
+    """
+    expanded = os.path.expanduser(path)
+    if path.startswith('~/') and expanded.startswith('//'):
+        expanded = expanded[1:]
+    return expanded
+
+
+# packages in the stdlib that may have installation metadata, but should not be
+# considered 'installed'.  this theoretically could be determined based on
+# dist.location (py27:`sysconfig.get_paths()['stdlib']`,
+# py26:sysconfig.get_config_vars('LIBDEST')), but fear platform variation may
+# make this ineffective, so hard-coding
+stdlib_pkgs = {"python", "wsgiref", "argparse"}
+
+
+# windows detection, covers cpython and ironpython
+WINDOWS = (sys.platform.startswith("win") or
+           (sys.platform == 'cli' and os.name == 'nt'))
+
+
+def samefile(file1, file2):
+    # type: (str, str) -> bool
+    """Provide an alternative for os.path.samefile on Windows/Python2"""
+    if hasattr(os.path, 'samefile'):
+        return os.path.samefile(file1, file2)
+    else:
+        path1 = os.path.normcase(os.path.abspath(file1))
+        path2 = os.path.normcase(os.path.abspath(file2))
+        return path1 == path2
+
+
+if hasattr(shutil, 'get_terminal_size'):
+    def get_terminal_size():
+        # type: () -> Tuple[int, int]
+        """
+        Returns a tuple (x, y) representing the width(x) and the height(y)
+        in characters of the terminal window.
+        """
+        return tuple(shutil.get_terminal_size())  # type: ignore
+else:
+    def get_terminal_size():
+        # type: () -> Tuple[int, int]
+        """
+        Returns a tuple (x, y) representing the width(x) and the height(y)
+        in characters of the terminal window.
+        """
+        def ioctl_GWINSZ(fd):
+            try:
+                import fcntl
+                import termios
+                import struct
+                cr = struct.unpack_from(
+                    'hh',
+                    fcntl.ioctl(fd, termios.TIOCGWINSZ, '12345678')
+                )
+            except Exception:
+                return None
+            if cr == (0, 0):
+                return None
+            return cr
+        cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2)
+        if not cr:
+            if sys.platform != "win32":
+                try:
+                    fd = os.open(os.ctermid(), os.O_RDONLY)
+                    cr = ioctl_GWINSZ(fd)
+                    os.close(fd)
+                except Exception:
+                    pass
+        if not cr:
+            cr = (os.environ.get('LINES', 25), os.environ.get('COLUMNS', 80))
+        return int(cr[1]), int(cr[0])
+
+
+# Fallback to noop_lru_cache in Python 2
+# TODO: this can be removed when python 2 support is dropped!
+def noop_lru_cache(maxsize=None):
+    # type: (Optional[int]) -> Callable[[F], F]
+    def _wrapper(f):
+        # type: (F) -> F
+        return f
+    return _wrapper
+
+
+lru_cache = getattr(functools, "lru_cache", noop_lru_cache)  # type: LruCache
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/compatibility_tags.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/compatibility_tags.py
new file mode 100644
index 0000000..4f21874
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/compatibility_tags.py
@@ -0,0 +1,166 @@
+"""Generate and work with PEP 425 Compatibility Tags.
+"""
+
+from __future__ import absolute_import
+
+import re
+
+from pip._vendor.packaging.tags import (
+    Tag,
+    compatible_tags,
+    cpython_tags,
+    generic_tags,
+    interpreter_name,
+    interpreter_version,
+    mac_platforms,
+)
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional, Tuple
+
+    from pip._vendor.packaging.tags import PythonVersion
+
+_osx_arch_pat = re.compile(r'(.+)_(\d+)_(\d+)_(.+)')
+
+
+def version_info_to_nodot(version_info):
+    # type: (Tuple[int, ...]) -> str
+    # Only use up to the first two numbers.
+    return ''.join(map(str, version_info[:2]))
+
+
+def _mac_platforms(arch):
+    # type: (str) -> List[str]
+    match = _osx_arch_pat.match(arch)
+    if match:
+        name, major, minor, actual_arch = match.groups()
+        mac_version = (int(major), int(minor))
+        arches = [
+            # Since we have always only checked that the platform starts
+            # with "macosx", for backwards-compatibility we extract the
+            # actual prefix provided by the user in case they provided
+            # something like "macosxcustom_". It may be good to remove
+            # this as undocumented or deprecate it in the future.
+            '{}_{}'.format(name, arch[len('macosx_'):])
+            for arch in mac_platforms(mac_version, actual_arch)
+        ]
+    else:
+        # arch pattern didn't match (?!)
+        arches = [arch]
+    return arches
+
+
+def _custom_manylinux_platforms(arch):
+    # type: (str) -> List[str]
+    arches = [arch]
+    arch_prefix, arch_sep, arch_suffix = arch.partition('_')
+    if arch_prefix == 'manylinux2014':
+        # manylinux1/manylinux2010 wheels run on most manylinux2014 systems
+        # with the exception of wheels depending on ncurses. PEP 599 states
+        # manylinux1/manylinux2010 wheels should be considered
+        # manylinux2014 wheels:
+        # https://www.python.org/dev/peps/pep-0599/#backwards-compatibility-with-manylinux2010-wheels
+        if arch_suffix in {'i686', 'x86_64'}:
+            arches.append('manylinux2010' + arch_sep + arch_suffix)
+            arches.append('manylinux1' + arch_sep + arch_suffix)
+    elif arch_prefix == 'manylinux2010':
+        # manylinux1 wheels run on most manylinux2010 systems with the
+        # exception of wheels depending on ncurses. PEP 571 states
+        # manylinux1 wheels should be considered manylinux2010 wheels:
+        # https://www.python.org/dev/peps/pep-0571/#backwards-compatibility-with-manylinux1-wheels
+        arches.append('manylinux1' + arch_sep + arch_suffix)
+    return arches
+
+
+def _get_custom_platforms(arch):
+    # type: (str) -> List[str]
+    arch_prefix, arch_sep, arch_suffix = arch.partition('_')
+    if arch.startswith('macosx'):
+        arches = _mac_platforms(arch)
+    elif arch_prefix in ['manylinux2014', 'manylinux2010']:
+        arches = _custom_manylinux_platforms(arch)
+    else:
+        arches = [arch]
+    return arches
+
+
+def _get_python_version(version):
+    # type: (str) -> PythonVersion
+    if len(version) > 1:
+        return int(version[0]), int(version[1:])
+    else:
+        return (int(version[0]),)
+
+
+def _get_custom_interpreter(implementation=None, version=None):
+    # type: (Optional[str], Optional[str]) -> str
+    if implementation is None:
+        implementation = interpreter_name()
+    if version is None:
+        version = interpreter_version()
+    return "{}{}".format(implementation, version)
+
+
+def get_supported(
+    version=None,  # type: Optional[str]
+    platform=None,  # type: Optional[str]
+    impl=None,  # type: Optional[str]
+    abi=None  # type: Optional[str]
+):
+    # type: (...) -> List[Tag]
+    """Return a list of supported tags for each version specified in
+    `versions`.
+
+    :param version: a string version, of the form "33" or "32",
+        or None. The version will be assumed to support our ABI.
+    :param platform: specify the exact platform you want valid
+        tags for, or None. If None, use the local system platform.
+    :param impl: specify the exact implementation you want valid
+        tags for, or None. If None, use the local interpreter impl.
+    :param abi: specify the exact abi you want valid
+        tags for, or None. If None, use the local interpreter abi.
+    """
+    supported = []  # type: List[Tag]
+
+    python_version = None  # type: Optional[PythonVersion]
+    if version is not None:
+        python_version = _get_python_version(version)
+
+    interpreter = _get_custom_interpreter(impl, version)
+
+    abis = None  # type: Optional[List[str]]
+    if abi is not None:
+        abis = [abi]
+
+    platforms = None  # type: Optional[List[str]]
+    if platform is not None:
+        platforms = _get_custom_platforms(platform)
+
+    is_cpython = (impl or interpreter_name()) == "cp"
+    if is_cpython:
+        supported.extend(
+            cpython_tags(
+                python_version=python_version,
+                abis=abis,
+                platforms=platforms,
+            )
+        )
+    else:
+        supported.extend(
+            generic_tags(
+                interpreter=interpreter,
+                abis=abis,
+                platforms=platforms,
+            )
+        )
+    supported.extend(
+        compatible_tags(
+            python_version=python_version,
+            interpreter=interpreter,
+            platforms=platforms,
+        )
+    )
+
+    return supported
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/datetime.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/datetime.py
new file mode 100644
index 0000000..4d0503c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/datetime.py
@@ -0,0 +1,14 @@
+"""For when pip wants to check the date or time.
+"""
+
+from __future__ import absolute_import
+
+import datetime
+
+
+def today_is_later_than(year, month, day):
+    # type: (int, int, int) -> bool
+    today = datetime.date.today()
+    given = datetime.date(year, month, day)
+
+    return today > given
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/deprecation.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/deprecation.py
new file mode 100644
index 0000000..2f20cfd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/deprecation.py
@@ -0,0 +1,104 @@
+"""
+A module that implements tooling to enable easy warnings about deprecations.
+"""
+
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import logging
+import warnings
+
+from pip._vendor.packaging.version import parse
+
+from pip import __version__ as current_version
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Optional
+
+
+DEPRECATION_MSG_PREFIX = "DEPRECATION: "
+
+
+class PipDeprecationWarning(Warning):
+    pass
+
+
+_original_showwarning = None  # type: Any
+
+
+# Warnings <-> Logging Integration
+def _showwarning(message, category, filename, lineno, file=None, line=None):
+    if file is not None:
+        if _original_showwarning is not None:
+            _original_showwarning(
+                message, category, filename, lineno, file, line,
+            )
+    elif issubclass(category, PipDeprecationWarning):
+        # We use a specially named logger which will handle all of the
+        # deprecation messages for pip.
+        logger = logging.getLogger("pip._internal.deprecations")
+        logger.warning(message)
+    else:
+        _original_showwarning(
+            message, category, filename, lineno, file, line,
+        )
+
+
+def install_warning_logger():
+    # type: () -> None
+    # Enable our Deprecation Warnings
+    warnings.simplefilter("default", PipDeprecationWarning, append=True)
+
+    global _original_showwarning
+
+    if _original_showwarning is None:
+        _original_showwarning = warnings.showwarning
+        warnings.showwarning = _showwarning
+
+
+def deprecated(reason, replacement, gone_in, issue=None):
+    # type: (str, Optional[str], Optional[str], Optional[int]) -> None
+    """Helper to deprecate existing functionality.
+
+    reason:
+        Textual reason shown to the user about why this functionality has
+        been deprecated.
+    replacement:
+        Textual suggestion shown to the user about what alternative
+        functionality they can use.
+    gone_in:
+        The version of pip does this functionality should get removed in.
+        Raises errors if pip's current version is greater than or equal to
+        this.
+    issue:
+        Issue number on the tracker that would serve as a useful place for
+        users to find related discussion and provide feedback.
+
+    Always pass replacement, gone_in and issue as keyword arguments for clarity
+    at the call site.
+    """
+
+    # Construct a nice message.
+    #   This is eagerly formatted as we want it to get logged as if someone
+    #   typed this entire message out.
+    sentences = [
+        (reason, DEPRECATION_MSG_PREFIX + "{}"),
+        (gone_in, "pip {} will remove support for this functionality."),
+        (replacement, "A possible replacement is {}."),
+        (issue, (
+            "You can find discussion regarding this at "
+            "https://github.com/pypa/pip/issues/{}."
+        )),
+    ]
+    message = " ".join(
+        template.format(val) for val, template in sentences if val is not None
+    )
+
+    # Raise as an error if it has to be removed.
+    if gone_in is not None and parse(current_version) >= parse(gone_in):
+        raise PipDeprecationWarning(message)
+
+    warnings.warn(message, category=PipDeprecationWarning, stacklevel=2)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/direct_url_helpers.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/direct_url_helpers.py
new file mode 100644
index 0000000..f1fe209
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/direct_url_helpers.py
@@ -0,0 +1,130 @@
+import logging
+
+from pip._internal.models.direct_url import (
+    DIRECT_URL_METADATA_NAME,
+    ArchiveInfo,
+    DirectUrl,
+    DirectUrlValidationError,
+    DirInfo,
+    VcsInfo,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.vcs import vcs
+
+try:
+    from json import JSONDecodeError
+except ImportError:
+    # PY2
+    JSONDecodeError = ValueError  # type: ignore
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional
+
+    from pip._internal.models.link import Link
+
+    from pip._vendor.pkg_resources import Distribution
+
+logger = logging.getLogger(__name__)
+
+
+def direct_url_as_pep440_direct_reference(direct_url, name):
+    # type: (DirectUrl, str) -> str
+    """Convert a DirectUrl to a pip requirement string."""
+    direct_url.validate()  # if invalid, this is a pip bug
+    requirement = name + " @ "
+    fragments = []
+    if isinstance(direct_url.info, VcsInfo):
+        requirement += "{}+{}@{}".format(
+            direct_url.info.vcs, direct_url.url, direct_url.info.commit_id
+        )
+    elif isinstance(direct_url.info, ArchiveInfo):
+        requirement += direct_url.url
+        if direct_url.info.hash:
+            fragments.append(direct_url.info.hash)
+    else:
+        assert isinstance(direct_url.info, DirInfo)
+        # pip should never reach this point for editables, since
+        # pip freeze inspects the editable project location to produce
+        # the requirement string
+        assert not direct_url.info.editable
+        requirement += direct_url.url
+    if direct_url.subdirectory:
+        fragments.append("subdirectory=" + direct_url.subdirectory)
+    if fragments:
+        requirement += "#" + "&".join(fragments)
+    return requirement
+
+
+def direct_url_from_link(link, source_dir=None, link_is_in_wheel_cache=False):
+    # type: (Link, Optional[str], bool) -> DirectUrl
+    if link.is_vcs:
+        vcs_backend = vcs.get_backend_for_scheme(link.scheme)
+        assert vcs_backend
+        url, requested_revision, _ = (
+            vcs_backend.get_url_rev_and_auth(link.url_without_fragment)
+        )
+        # For VCS links, we need to find out and add commit_id.
+        if link_is_in_wheel_cache:
+            # If the requested VCS link corresponds to a cached
+            # wheel, it means the requested revision was an
+            # immutable commit hash, otherwise it would not have
+            # been cached. In that case we don't have a source_dir
+            # with the VCS checkout.
+            assert requested_revision
+            commit_id = requested_revision
+        else:
+            # If the wheel was not in cache, it means we have
+            # had to checkout from VCS to build and we have a source_dir
+            # which we can inspect to find out the commit id.
+            assert source_dir
+            commit_id = vcs_backend.get_revision(source_dir)
+        return DirectUrl(
+            url=url,
+            info=VcsInfo(
+                vcs=vcs_backend.name,
+                commit_id=commit_id,
+                requested_revision=requested_revision,
+            ),
+            subdirectory=link.subdirectory_fragment,
+        )
+    elif link.is_existing_dir():
+        return DirectUrl(
+            url=link.url_without_fragment,
+            info=DirInfo(),
+            subdirectory=link.subdirectory_fragment,
+        )
+    else:
+        hash = None
+        hash_name = link.hash_name
+        if hash_name:
+            hash = "{}={}".format(hash_name, link.hash)
+        return DirectUrl(
+            url=link.url_without_fragment,
+            info=ArchiveInfo(hash=hash),
+            subdirectory=link.subdirectory_fragment,
+        )
+
+
+def dist_get_direct_url(dist):
+    # type: (Distribution) -> Optional[DirectUrl]
+    """Obtain a DirectUrl from a pkg_resource.Distribution.
+
+    Returns None if the distribution has no `direct_url.json` metadata,
+    or if `direct_url.json` is invalid.
+    """
+    if not dist.has_metadata(DIRECT_URL_METADATA_NAME):
+        return None
+    try:
+        return DirectUrl.from_json(dist.get_metadata(DIRECT_URL_METADATA_NAME))
+    except (
+        DirectUrlValidationError,
+        JSONDecodeError,
+        UnicodeDecodeError
+    ) as e:
+        logger.warning(
+            "Error parsing %s for %s: %s",
+            DIRECT_URL_METADATA_NAME,
+            dist.project_name,
+            e,
+        )
+        return None
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/distutils_args.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/distutils_args.py
new file mode 100644
index 0000000..e38e402
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/distutils_args.py
@@ -0,0 +1,48 @@
+from distutils.errors import DistutilsArgError
+from distutils.fancy_getopt import FancyGetopt
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Dict, List
+
+
+_options = [
+    ("exec-prefix=", None, ""),
+    ("home=", None, ""),
+    ("install-base=", None, ""),
+    ("install-data=", None, ""),
+    ("install-headers=", None, ""),
+    ("install-lib=", None, ""),
+    ("install-platlib=", None, ""),
+    ("install-purelib=", None, ""),
+    ("install-scripts=", None, ""),
+    ("prefix=", None, ""),
+    ("root=", None, ""),
+    ("user", None, ""),
+]
+
+
+# typeshed doesn't permit Tuple[str, None, str], see python/typeshed#3469.
+_distutils_getopt = FancyGetopt(_options)  # type: ignore
+
+
+def parse_distutils_args(args):
+    # type: (List[str]) -> Dict[str, str]
+    """Parse provided arguments, returning an object that has the
+    matched arguments.
+
+    Any unknown arguments are ignored.
+    """
+    result = {}
+    for arg in args:
+        try:
+            _, match = _distutils_getopt.getopt(args=[arg])
+        except DistutilsArgError:
+            # We don't care about any other options, which here may be
+            # considered unrecognized since our option list is not
+            # exhaustive.
+            pass
+        else:
+            result.update(match.__dict__)
+    return result
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/encoding.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/encoding.py
new file mode 100644
index 0000000..5b83d61
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/encoding.py
@@ -0,0 +1,41 @@
+import codecs
+import locale
+import re
+import sys
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Tuple, Text
+
+BOMS = [
+    (codecs.BOM_UTF8, 'utf-8'),
+    (codecs.BOM_UTF16, 'utf-16'),
+    (codecs.BOM_UTF16_BE, 'utf-16-be'),
+    (codecs.BOM_UTF16_LE, 'utf-16-le'),
+    (codecs.BOM_UTF32, 'utf-32'),
+    (codecs.BOM_UTF32_BE, 'utf-32-be'),
+    (codecs.BOM_UTF32_LE, 'utf-32-le'),
+]  # type: List[Tuple[bytes, Text]]
+
+ENCODING_RE = re.compile(br'coding[:=]\s*([-\w.]+)')
+
+
+def auto_decode(data):
+    # type: (bytes) -> Text
+    """Check a bytes string for a BOM to correctly detect the encoding
+
+    Fallback to locale.getpreferredencoding(False) like open() on Python3"""
+    for bom, encoding in BOMS:
+        if data.startswith(bom):
+            return data[len(bom):].decode(encoding)
+    # Lets check the first two lines as in PEP263
+    for line in data.split(b'\n')[:2]:
+        if line[0:1] == b'#' and ENCODING_RE.search(line):
+            result = ENCODING_RE.search(line)
+            assert result is not None
+            encoding = result.groups()[0].decode('ascii')
+            return data.decode(encoding)
+    return data.decode(
+        locale.getpreferredencoding(False) or sys.getdefaultencoding(),
+    )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/entrypoints.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/entrypoints.py
new file mode 100644
index 0000000..befd01c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/entrypoints.py
@@ -0,0 +1,31 @@
+import sys
+
+from pip._internal.cli.main import main
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, List
+
+
+def _wrapper(args=None):
+    # type: (Optional[List[str]]) -> int
+    """Central wrapper for all old entrypoints.
+
+    Historically pip has had several entrypoints defined. Because of issues
+    arising from PATH, sys.path, multiple Pythons, their interactions, and most
+    of them having a pip installed, users suffer every time an entrypoint gets
+    moved.
+
+    To alleviate this pain, and provide a mechanism for warning users and
+    directing them to an appropriate place for help, we now define all of
+    our old entrypoints as wrappers for the current one.
+    """
+    sys.stderr.write(
+        "WARNING: pip is being invoked by an old script wrapper. This will "
+        "fail in a future version of pip.\n"
+        "Please see https://github.com/pypa/pip/issues/5599 for advice on "
+        "fixing the underlying issue.\n"
+        "To avoid this problem you can invoke Python with '-m pip' instead of "
+        "running pip directly.\n"
+    )
+    return main(args)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/filesystem.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/filesystem.py
new file mode 100644
index 0000000..303243f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/filesystem.py
@@ -0,0 +1,224 @@
+import errno
+import fnmatch
+import os
+import os.path
+import random
+import shutil
+import stat
+import sys
+from contextlib import contextmanager
+from tempfile import NamedTemporaryFile
+
+# NOTE: retrying is not annotated in typeshed as on 2017-07-17, which is
+#       why we ignore the type on this import.
+from pip._vendor.retrying import retry  # type: ignore
+from pip._vendor.six import PY2
+
+from pip._internal.utils.compat import get_path_uid
+from pip._internal.utils.misc import format_size
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING, cast
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, BinaryIO, Iterator, List, Union
+
+    class NamedTemporaryFileResult(BinaryIO):
+        @property
+        def file(self):
+            # type: () -> BinaryIO
+            pass
+
+
+def check_path_owner(path):
+    # type: (str) -> bool
+    # If we don't have a way to check the effective uid of this process, then
+    # we'll just assume that we own the directory.
+    if sys.platform == "win32" or not hasattr(os, "geteuid"):
+        return True
+
+    assert os.path.isabs(path)
+
+    previous = None
+    while path != previous:
+        if os.path.lexists(path):
+            # Check if path is writable by current user.
+            if os.geteuid() == 0:
+                # Special handling for root user in order to handle properly
+                # cases where users use sudo without -H flag.
+                try:
+                    path_uid = get_path_uid(path)
+                except OSError:
+                    return False
+                return path_uid == 0
+            else:
+                return os.access(path, os.W_OK)
+        else:
+            previous, path = path, os.path.dirname(path)
+    return False  # assume we don't own the path
+
+
+def copy2_fixed(src, dest):
+    # type: (str, str) -> None
+    """Wrap shutil.copy2() but map errors copying socket files to
+    SpecialFileError as expected.
+
+    See also https://bugs.python.org/issue37700.
+    """
+    try:
+        shutil.copy2(src, dest)
+    except (OSError, IOError):
+        for f in [src, dest]:
+            try:
+                is_socket_file = is_socket(f)
+            except OSError:
+                # An error has already occurred. Another error here is not
+                # a problem and we can ignore it.
+                pass
+            else:
+                if is_socket_file:
+                    raise shutil.SpecialFileError(
+                        "`{f}` is a socket".format(**locals()))
+
+        raise
+
+
+def is_socket(path):
+    # type: (str) -> bool
+    return stat.S_ISSOCK(os.lstat(path).st_mode)
+
+
+@contextmanager
+def adjacent_tmp_file(path, **kwargs):
+    # type: (str, **Any) -> Iterator[NamedTemporaryFileResult]
+    """Return a file-like object pointing to a tmp file next to path.
+
+    The file is created securely and is ensured to be written to disk
+    after the context reaches its end.
+
+    kwargs will be passed to tempfile.NamedTemporaryFile to control
+    the way the temporary file will be opened.
+    """
+    with NamedTemporaryFile(
+        delete=False,
+        dir=os.path.dirname(path),
+        prefix=os.path.basename(path),
+        suffix='.tmp',
+        **kwargs
+    ) as f:
+        result = cast('NamedTemporaryFileResult', f)
+        try:
+            yield result
+        finally:
+            result.file.flush()
+            os.fsync(result.file.fileno())
+
+
+_replace_retry = retry(stop_max_delay=1000, wait_fixed=250)
+
+if PY2:
+    @_replace_retry
+    def replace(src, dest):
+        # type: (str, str) -> None
+        try:
+            os.rename(src, dest)
+        except OSError:
+            os.remove(dest)
+            os.rename(src, dest)
+
+else:
+    replace = _replace_retry(os.replace)
+
+
+# test_writable_dir and _test_writable_dir_win are copied from Flit,
+# with the author's agreement to also place them under pip's license.
+def test_writable_dir(path):
+    # type: (str) -> bool
+    """Check if a directory is writable.
+
+    Uses os.access() on POSIX, tries creating files on Windows.
+    """
+    # If the directory doesn't exist, find the closest parent that does.
+    while not os.path.isdir(path):
+        parent = os.path.dirname(path)
+        if parent == path:
+            break  # Should never get here, but infinite loops are bad
+        path = parent
+
+    if os.name == 'posix':
+        return os.access(path, os.W_OK)
+
+    return _test_writable_dir_win(path)
+
+
+def _test_writable_dir_win(path):
+    # type: (str) -> bool
+    # os.access doesn't work on Windows: http://bugs.python.org/issue2528
+    # and we can't use tempfile: http://bugs.python.org/issue22107
+    basename = 'accesstest_deleteme_fishfingers_custard_'
+    alphabet = 'abcdefghijklmnopqrstuvwxyz0123456789'
+    for _ in range(10):
+        name = basename + ''.join(random.choice(alphabet) for _ in range(6))
+        file = os.path.join(path, name)
+        try:
+            fd = os.open(file, os.O_RDWR | os.O_CREAT | os.O_EXCL)
+        # Python 2 doesn't support FileExistsError and PermissionError.
+        except OSError as e:
+            # exception FileExistsError
+            if e.errno == errno.EEXIST:
+                continue
+            # exception PermissionError
+            if e.errno == errno.EPERM or e.errno == errno.EACCES:
+                # This could be because there's a directory with the same name.
+                # But it's highly unlikely there's a directory called that,
+                # so we'll assume it's because the parent dir is not writable.
+                # This could as well be because the parent dir is not readable,
+                # due to non-privileged user access.
+                return False
+            raise
+        else:
+            os.close(fd)
+            os.unlink(file)
+            return True
+
+    # This should never be reached
+    raise EnvironmentError(
+        'Unexpected condition testing for writable directory'
+    )
+
+
+def find_files(path, pattern):
+    # type: (str, str) -> List[str]
+    """Returns a list of absolute paths of files beneath path, recursively,
+    with filenames which match the UNIX-style shell glob pattern."""
+    result = []  # type: List[str]
+    for root, _, files in os.walk(path):
+        matches = fnmatch.filter(files, pattern)
+        result.extend(os.path.join(root, f) for f in matches)
+    return result
+
+
+def file_size(path):
+    # type: (str) -> Union[int, float]
+    # If it's a symlink, return 0.
+    if os.path.islink(path):
+        return 0
+    return os.path.getsize(path)
+
+
+def format_file_size(path):
+    # type: (str) -> str
+    return format_size(file_size(path))
+
+
+def directory_size(path):
+    # type: (str) -> Union[int, float]
+    size = 0.0
+    for root, _dirs, files in os.walk(path):
+        for filename in files:
+            file_path = os.path.join(root, filename)
+            size += file_size(file_path)
+    return size
+
+
+def format_directory_size(path):
+    # type: (str) -> str
+    return format_size(directory_size(path))
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/filetypes.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/filetypes.py
new file mode 100644
index 0000000..daa0ca7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/filetypes.py
@@ -0,0 +1,16 @@
+"""Filetype information.
+"""
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Tuple
+
+WHEEL_EXTENSION = '.whl'
+BZ2_EXTENSIONS = ('.tar.bz2', '.tbz')  # type: Tuple[str, ...]
+XZ_EXTENSIONS = ('.tar.xz', '.txz', '.tlz',
+                 '.tar.lz', '.tar.lzma')  # type: Tuple[str, ...]
+ZIP_EXTENSIONS = ('.zip', WHEEL_EXTENSION)  # type: Tuple[str, ...]
+TAR_EXTENSIONS = ('.tar.gz', '.tgz', '.tar')  # type: Tuple[str, ...]
+ARCHIVE_EXTENSIONS = (
+    ZIP_EXTENSIONS + BZ2_EXTENSIONS + TAR_EXTENSIONS + XZ_EXTENSIONS
+)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/glibc.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/glibc.py
new file mode 100644
index 0000000..3610424
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/glibc.py
@@ -0,0 +1,98 @@
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+from __future__ import absolute_import
+
+import os
+import sys
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Tuple
+
+
+def glibc_version_string():
+    # type: () -> Optional[str]
+    "Returns glibc version string, or None if not using glibc."
+    return glibc_version_string_confstr() or glibc_version_string_ctypes()
+
+
+def glibc_version_string_confstr():
+    # type: () -> Optional[str]
+    "Primary implementation of glibc_version_string using os.confstr."
+    # os.confstr is quite a bit faster than ctypes.DLL. It's also less likely
+    # to be broken or missing. This strategy is used in the standard library
+    # platform module:
+    # https://github.com/python/cpython/blob/fcf1d003bf4f0100c9d0921ff3d70e1127ca1b71/Lib/platform.py#L175-L183
+    if sys.platform == "win32":
+        return None
+    try:
+        # os.confstr("CS_GNU_LIBC_VERSION") returns a string like "glibc 2.17":
+        _, version = os.confstr("CS_GNU_LIBC_VERSION").split()
+    except (AttributeError, OSError, ValueError):
+        # os.confstr() or CS_GNU_LIBC_VERSION not available (or a bad value)...
+        return None
+    return version
+
+
+def glibc_version_string_ctypes():
+    # type: () -> Optional[str]
+    "Fallback implementation of glibc_version_string using ctypes."
+
+    try:
+        import ctypes
+    except ImportError:
+        return None
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    process_namespace = ctypes.CDLL(None)
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str = gnu_get_libc_version()
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+# platform.libc_ver regularly returns completely nonsensical glibc
+# versions. E.g. on my computer, platform says:
+#
+#   ~$ python2.7 -c 'import platform; print(platform.libc_ver())'
+#   ('glibc', '2.7')
+#   ~$ python3.5 -c 'import platform; print(platform.libc_ver())'
+#   ('glibc', '2.9')
+#
+# But the truth is:
+#
+#   ~$ ldd --version
+#   ldd (Debian GLIBC 2.22-11) 2.22
+#
+# This is unfortunate, because it means that the linehaul data on libc
+# versions that was generated by pip 8.1.2 and earlier is useless and
+# misleading. Solution: instead of using platform, use our code that actually
+# works.
+def libc_ver():
+    # type: () -> Tuple[str, str]
+    """Try to determine the glibc version
+
+    Returns a tuple of strings (lib, version) which default to empty strings
+    in case the lookup fails.
+    """
+    glibc_version = glibc_version_string()
+    if glibc_version is None:
+        return ("", "")
+    else:
+        return ("glibc", glibc_version)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/hashes.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/hashes.py
new file mode 100644
index 0000000..d9f74a6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/hashes.py
@@ -0,0 +1,153 @@
+from __future__ import absolute_import
+
+import hashlib
+
+from pip._vendor.six import iteritems, iterkeys, itervalues
+
+from pip._internal.exceptions import (
+    HashMismatch,
+    HashMissing,
+    InstallationError,
+)
+from pip._internal.utils.misc import read_chunks
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Dict, List, BinaryIO, NoReturn, Iterator
+    )
+    from pip._vendor.six import PY3
+    if PY3:
+        from hashlib import _Hash
+    else:
+        from hashlib import _hash as _Hash
+
+
+# The recommended hash algo of the moment. Change this whenever the state of
+# the art changes; it won't hurt backward compatibility.
+FAVORITE_HASH = 'sha256'
+
+
+# Names of hashlib algorithms allowed by the --hash option and ``pip hash``
+# Currently, those are the ones at least as collision-resistant as sha256.
+STRONG_HASHES = ['sha256', 'sha384', 'sha512']
+
+
+class Hashes(object):
+    """A wrapper that builds multiple hashes at once and checks them against
+    known-good values
+
+    """
+    def __init__(self, hashes=None):
+        # type: (Dict[str, List[str]]) -> None
+        """
+        :param hashes: A dict of algorithm names pointing to lists of allowed
+            hex digests
+        """
+        self._allowed = {} if hashes is None else hashes
+
+    def __and__(self, other):
+        # type: (Hashes) -> Hashes
+        if not isinstance(other, Hashes):
+            return NotImplemented
+
+        # If either of the Hashes object is entirely empty (i.e. no hash
+        # specified at all), all hashes from the other object are allowed.
+        if not other:
+            return self
+        if not self:
+            return other
+
+        # Otherwise only hashes that present in both objects are allowed.
+        new = {}
+        for alg, values in iteritems(other._allowed):
+            if alg not in self._allowed:
+                continue
+            new[alg] = [v for v in values if v in self._allowed[alg]]
+        return Hashes(new)
+
+    @property
+    def digest_count(self):
+        # type: () -> int
+        return sum(len(digests) for digests in self._allowed.values())
+
+    def is_hash_allowed(
+        self,
+        hash_name,   # type: str
+        hex_digest,  # type: str
+    ):
+        # type: (...) -> bool
+        """Return whether the given hex digest is allowed."""
+        return hex_digest in self._allowed.get(hash_name, [])
+
+    def check_against_chunks(self, chunks):
+        # type: (Iterator[bytes]) -> None
+        """Check good hashes against ones built from iterable of chunks of
+        data.
+
+        Raise HashMismatch if none match.
+
+        """
+        gots = {}
+        for hash_name in iterkeys(self._allowed):
+            try:
+                gots[hash_name] = hashlib.new(hash_name)
+            except (ValueError, TypeError):
+                raise InstallationError(
+                    'Unknown hash name: {}'.format(hash_name)
+                )
+
+        for chunk in chunks:
+            for hash in itervalues(gots):
+                hash.update(chunk)
+
+        for hash_name, got in iteritems(gots):
+            if got.hexdigest() in self._allowed[hash_name]:
+                return
+        self._raise(gots)
+
+    def _raise(self, gots):
+        # type: (Dict[str, _Hash]) -> NoReturn
+        raise HashMismatch(self._allowed, gots)
+
+    def check_against_file(self, file):
+        # type: (BinaryIO) -> None
+        """Check good hashes against a file-like object
+
+        Raise HashMismatch if none match.
+
+        """
+        return self.check_against_chunks(read_chunks(file))
+
+    def check_against_path(self, path):
+        # type: (str) -> None
+        with open(path, 'rb') as file:
+            return self.check_against_file(file)
+
+    def __nonzero__(self):
+        # type: () -> bool
+        """Return whether I know any known-good hashes."""
+        return bool(self._allowed)
+
+    def __bool__(self):
+        # type: () -> bool
+        return self.__nonzero__()
+
+
+class MissingHashes(Hashes):
+    """A workalike for Hashes used when we're missing a hash for a requirement
+
+    It computes the actual hash of the requirement and raises a HashMissing
+    exception showing it to the user.
+
+    """
+    def __init__(self):
+        # type: () -> None
+        """Don't offer the ``hashes`` kwarg."""
+        # Pass our favorite hash in to generate a "gotten hash". With the
+        # empty list, it will never match, so an error will always raise.
+        super(MissingHashes, self).__init__(hashes={FAVORITE_HASH: []})
+
+    def _raise(self, gots):
+        # type: (Dict[str, _Hash]) -> NoReturn
+        raise HashMissing(gots[FAVORITE_HASH].hexdigest())
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/inject_securetransport.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/inject_securetransport.py
new file mode 100644
index 0000000..5b93b1d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/inject_securetransport.py
@@ -0,0 +1,36 @@
+"""A helper module that injects SecureTransport, on import.
+
+The import should be done as early as possible, to ensure all requests and
+sessions (or whatever) are created after injecting SecureTransport.
+
+Note that we only do the injection on macOS, when the linked OpenSSL is too
+old to handle TLSv1.2.
+"""
+
+import sys
+
+
+def inject_securetransport():
+    # type: () -> None
+    # Only relevant on macOS
+    if sys.platform != "darwin":
+        return
+
+    try:
+        import ssl
+    except ImportError:
+        return
+
+    # Checks for OpenSSL 1.0.1
+    if ssl.OPENSSL_VERSION_NUMBER >= 0x1000100f:
+        return
+
+    try:
+        from pip._vendor.urllib3.contrib import securetransport
+    except (ImportError, OSError):
+        return
+
+    securetransport.inject_into_urllib3()
+
+
+inject_securetransport()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/logging.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/logging.py
new file mode 100644
index 0000000..9a017cf
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/logging.py
@@ -0,0 +1,399 @@
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import contextlib
+import errno
+import logging
+import logging.handlers
+import os
+import sys
+from logging import Filter, getLogger
+
+from pip._vendor.six import PY2
+
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.deprecation import DEPRECATION_MSG_PREFIX
+from pip._internal.utils.misc import ensure_dir
+
+try:
+    import threading
+except ImportError:
+    import dummy_threading as threading  # type: ignore
+
+
+try:
+    # Use "import as" and set colorama in the else clause to avoid mypy
+    # errors and get the following correct revealed type for colorama:
+    # `Union[_importlib_modulespec.ModuleType, None]`
+    # Otherwise, we get an error like the following in the except block:
+    #  > Incompatible types in assignment (expression has type "None",
+    #   variable has type Module)
+    # TODO: eliminate the need to use "import as" once mypy addresses some
+    #  of its issues with conditional imports. Here is an umbrella issue:
+    #  https://github.com/python/mypy/issues/1297
+    from pip._vendor import colorama as _colorama
+# Lots of different errors can come from this, including SystemError and
+# ImportError.
+except Exception:
+    colorama = None
+else:
+    # Import Fore explicitly rather than accessing below as colorama.Fore
+    # to avoid the following error running mypy:
+    # > Module has no attribute "Fore"
+    # TODO: eliminate the need to import Fore once mypy addresses some of its
+    #  issues with conditional imports. This particular case could be an
+    #  instance of the following issue (but also see the umbrella issue above):
+    #  https://github.com/python/mypy/issues/3500
+    from pip._vendor.colorama import Fore
+
+    colorama = _colorama
+
+
+_log_state = threading.local()
+subprocess_logger = getLogger('pip.subprocessor')
+
+
+class BrokenStdoutLoggingError(Exception):
+    """
+    Raised if BrokenPipeError occurs for the stdout stream while logging.
+    """
+    pass
+
+
+# BrokenPipeError does not exist in Python 2 and, in addition, manifests
+# differently in Windows and non-Windows.
+if WINDOWS:
+    # In Windows, a broken pipe can show up as EINVAL rather than EPIPE:
+    # https://bugs.python.org/issue19612
+    # https://bugs.python.org/issue30418
+    if PY2:
+        def _is_broken_pipe_error(exc_class, exc):
+            """See the docstring for non-Windows Python 3 below."""
+            return (exc_class is IOError and
+                    exc.errno in (errno.EINVAL, errno.EPIPE))
+    else:
+        # In Windows, a broken pipe IOError became OSError in Python 3.
+        def _is_broken_pipe_error(exc_class, exc):
+            """See the docstring for non-Windows Python 3 below."""
+            return ((exc_class is BrokenPipeError) or  # noqa: F821
+                    (exc_class is OSError and
+                     exc.errno in (errno.EINVAL, errno.EPIPE)))
+elif PY2:
+    def _is_broken_pipe_error(exc_class, exc):
+        """See the docstring for non-Windows Python 3 below."""
+        return (exc_class is IOError and exc.errno == errno.EPIPE)
+else:
+    # Then we are in the non-Windows Python 3 case.
+    def _is_broken_pipe_error(exc_class, exc):
+        """
+        Return whether an exception is a broken pipe error.
+
+        Args:
+          exc_class: an exception class.
+          exc: an exception instance.
+        """
+        return (exc_class is BrokenPipeError)  # noqa: F821
+
+
+@contextlib.contextmanager
+def indent_log(num=2):
+    """
+    A context manager which will cause the log output to be indented for any
+    log messages emitted inside it.
+    """
+    # For thread-safety
+    _log_state.indentation = get_indentation()
+    _log_state.indentation += num
+    try:
+        yield
+    finally:
+        _log_state.indentation -= num
+
+
+def get_indentation():
+    return getattr(_log_state, 'indentation', 0)
+
+
+class IndentingFormatter(logging.Formatter):
+
+    def __init__(self, *args, **kwargs):
+        """
+        A logging.Formatter that obeys the indent_log() context manager.
+
+        :param add_timestamp: A bool indicating output lines should be prefixed
+            with their record's timestamp.
+        """
+        self.add_timestamp = kwargs.pop("add_timestamp", False)
+        super(IndentingFormatter, self).__init__(*args, **kwargs)
+
+    def get_message_start(self, formatted, levelno):
+        """
+        Return the start of the formatted log message (not counting the
+        prefix to add to each line).
+        """
+        if levelno < logging.WARNING:
+            return ''
+        if formatted.startswith(DEPRECATION_MSG_PREFIX):
+            # Then the message already has a prefix.  We don't want it to
+            # look like "WARNING: DEPRECATION: ...."
+            return ''
+        if levelno < logging.ERROR:
+            return 'WARNING: '
+
+        return 'ERROR: '
+
+    def format(self, record):
+        """
+        Calls the standard formatter, but will indent all of the log message
+        lines by our current indentation level.
+        """
+        formatted = super(IndentingFormatter, self).format(record)
+        message_start = self.get_message_start(formatted, record.levelno)
+        formatted = message_start + formatted
+
+        prefix = ''
+        if self.add_timestamp:
+            # TODO: Use Formatter.default_time_format after dropping PY2.
+            t = self.formatTime(record, "%Y-%m-%dT%H:%M:%S")
+            prefix = '{t},{record.msecs:03.0f} '.format(**locals())
+        prefix += " " * get_indentation()
+        formatted = "".join([
+            prefix + line
+            for line in formatted.splitlines(True)
+        ])
+        return formatted
+
+
+def _color_wrap(*colors):
+    def wrapped(inp):
+        return "".join(list(colors) + [inp, colorama.Style.RESET_ALL])
+    return wrapped
+
+
+class ColorizedStreamHandler(logging.StreamHandler):
+
+    # Don't build up a list of colors if we don't have colorama
+    if colorama:
+        COLORS = [
+            # This needs to be in order from highest logging level to lowest.
+            (logging.ERROR, _color_wrap(Fore.RED)),
+            (logging.WARNING, _color_wrap(Fore.YELLOW)),
+        ]
+    else:
+        COLORS = []
+
+    def __init__(self, stream=None, no_color=None):
+        logging.StreamHandler.__init__(self, stream)
+        self._no_color = no_color
+
+        if WINDOWS and colorama:
+            self.stream = colorama.AnsiToWin32(self.stream)
+
+    def _using_stdout(self):
+        """
+        Return whether the handler is using sys.stdout.
+        """
+        if WINDOWS and colorama:
+            # Then self.stream is an AnsiToWin32 object.
+            return self.stream.wrapped is sys.stdout
+
+        return self.stream is sys.stdout
+
+    def should_color(self):
+        # Don't colorize things if we do not have colorama or if told not to
+        if not colorama or self._no_color:
+            return False
+
+        real_stream = (
+            self.stream if not isinstance(self.stream, colorama.AnsiToWin32)
+            else self.stream.wrapped
+        )
+
+        # If the stream is a tty we should color it
+        if hasattr(real_stream, "isatty") and real_stream.isatty():
+            return True
+
+        # If we have an ANSI term we should color it
+        if os.environ.get("TERM") == "ANSI":
+            return True
+
+        # If anything else we should not color it
+        return False
+
+    def format(self, record):
+        msg = logging.StreamHandler.format(self, record)
+
+        if self.should_color():
+            for level, color in self.COLORS:
+                if record.levelno >= level:
+                    msg = color(msg)
+                    break
+
+        return msg
+
+    # The logging module says handleError() can be customized.
+    def handleError(self, record):
+        exc_class, exc = sys.exc_info()[:2]
+        # If a broken pipe occurred while calling write() or flush() on the
+        # stdout stream in logging's Handler.emit(), then raise our special
+        # exception so we can handle it in main() instead of logging the
+        # broken pipe error and continuing.
+        if (exc_class and self._using_stdout() and
+                _is_broken_pipe_error(exc_class, exc)):
+            raise BrokenStdoutLoggingError()
+
+        return super(ColorizedStreamHandler, self).handleError(record)
+
+
+class BetterRotatingFileHandler(logging.handlers.RotatingFileHandler):
+
+    def _open(self):
+        ensure_dir(os.path.dirname(self.baseFilename))
+        return logging.handlers.RotatingFileHandler._open(self)
+
+
+class MaxLevelFilter(Filter):
+
+    def __init__(self, level):
+        self.level = level
+
+    def filter(self, record):
+        return record.levelno < self.level
+
+
+class ExcludeLoggerFilter(Filter):
+
+    """
+    A logging Filter that excludes records from a logger (or its children).
+    """
+
+    def filter(self, record):
+        # The base Filter class allows only records from a logger (or its
+        # children).
+        return not super(ExcludeLoggerFilter, self).filter(record)
+
+
+def setup_logging(verbosity, no_color, user_log_file):
+    """Configures and sets up all of the logging
+
+    Returns the requested logging level, as its integer value.
+    """
+
+    # Determine the level to be logging at.
+    if verbosity >= 1:
+        level = "DEBUG"
+    elif verbosity == -1:
+        level = "WARNING"
+    elif verbosity == -2:
+        level = "ERROR"
+    elif verbosity <= -3:
+        level = "CRITICAL"
+    else:
+        level = "INFO"
+
+    level_number = getattr(logging, level)
+
+    # The "root" logger should match the "console" level *unless* we also need
+    # to log to a user log file.
+    include_user_log = user_log_file is not None
+    if include_user_log:
+        additional_log_file = user_log_file
+        root_level = "DEBUG"
+    else:
+        additional_log_file = "/dev/null"
+        root_level = level
+
+    # Disable any logging besides WARNING unless we have DEBUG level logging
+    # enabled for vendored libraries.
+    vendored_log_level = "WARNING" if level in ["INFO", "ERROR"] else "DEBUG"
+
+    # Shorthands for clarity
+    log_streams = {
+        "stdout": "ext://sys.stdout",
+        "stderr": "ext://sys.stderr",
+    }
+    handler_classes = {
+        "stream": "pip._internal.utils.logging.ColorizedStreamHandler",
+        "file": "pip._internal.utils.logging.BetterRotatingFileHandler",
+    }
+    handlers = ["console", "console_errors", "console_subprocess"] + (
+        ["user_log"] if include_user_log else []
+    )
+
+    logging.config.dictConfig({
+        "version": 1,
+        "disable_existing_loggers": False,
+        "filters": {
+            "exclude_warnings": {
+                "()": "pip._internal.utils.logging.MaxLevelFilter",
+                "level": logging.WARNING,
+            },
+            "restrict_to_subprocess": {
+                "()": "logging.Filter",
+                "name": subprocess_logger.name,
+            },
+            "exclude_subprocess": {
+                "()": "pip._internal.utils.logging.ExcludeLoggerFilter",
+                "name": subprocess_logger.name,
+            },
+        },
+        "formatters": {
+            "indent": {
+                "()": IndentingFormatter,
+                "format": "%(message)s",
+            },
+            "indent_with_timestamp": {
+                "()": IndentingFormatter,
+                "format": "%(message)s",
+                "add_timestamp": True,
+            },
+        },
+        "handlers": {
+            "console": {
+                "level": level,
+                "class": handler_classes["stream"],
+                "no_color": no_color,
+                "stream": log_streams["stdout"],
+                "filters": ["exclude_subprocess", "exclude_warnings"],
+                "formatter": "indent",
+            },
+            "console_errors": {
+                "level": "WARNING",
+                "class": handler_classes["stream"],
+                "no_color": no_color,
+                "stream": log_streams["stderr"],
+                "filters": ["exclude_subprocess"],
+                "formatter": "indent",
+            },
+            # A handler responsible for logging to the console messages
+            # from the "subprocessor" logger.
+            "console_subprocess": {
+                "level": level,
+                "class": handler_classes["stream"],
+                "no_color": no_color,
+                "stream": log_streams["stderr"],
+                "filters": ["restrict_to_subprocess"],
+                "formatter": "indent",
+            },
+            "user_log": {
+                "level": "DEBUG",
+                "class": handler_classes["file"],
+                "filename": additional_log_file,
+                "delay": True,
+                "formatter": "indent_with_timestamp",
+            },
+        },
+        "root": {
+            "level": root_level,
+            "handlers": handlers,
+        },
+        "loggers": {
+            "pip._vendor": {
+                "level": vendored_log_level
+            }
+        },
+    })
+
+    return level_number
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/misc.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/misc.py
new file mode 100644
index 0000000..5629c60
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/misc.py
@@ -0,0 +1,959 @@
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import contextlib
+import errno
+import getpass
+import hashlib
+import io
+import logging
+import os
+import posixpath
+import shutil
+import stat
+import sys
+from collections import deque
+from itertools import tee
+
+from pip._vendor import pkg_resources
+from pip._vendor.packaging.utils import canonicalize_name
+# NOTE: retrying is not annotated in typeshed as on 2017-07-17, which is
+#       why we ignore the type on this import.
+from pip._vendor.retrying import retry  # type: ignore
+from pip._vendor.six import PY2, text_type
+from pip._vendor.six.moves import filter, filterfalse, input, map, zip_longest
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+from pip._vendor.six.moves.urllib.parse import unquote as urllib_unquote
+
+from pip import __version__
+from pip._internal.exceptions import CommandError
+from pip._internal.locations import (
+    get_major_minor_version,
+    site_packages,
+    user_site,
+)
+from pip._internal.utils.compat import (
+    WINDOWS,
+    expanduser,
+    stdlib_pkgs,
+    str_to_display,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING, cast
+from pip._internal.utils.virtualenv import (
+    running_under_virtualenv,
+    virtualenv_no_global,
+)
+
+if PY2:
+    from io import BytesIO as StringIO
+else:
+    from io import StringIO
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, AnyStr, Callable, Container, Iterable, Iterator, List, Optional,
+        Text, Tuple, TypeVar, Union,
+    )
+    from pip._vendor.pkg_resources import Distribution
+
+    VersionInfo = Tuple[int, int, int]
+    T = TypeVar("T")
+
+
+__all__ = ['rmtree', 'display_path', 'backup_dir',
+           'ask', 'splitext',
+           'format_size', 'is_installable_dir',
+           'normalize_path',
+           'renames', 'get_prog',
+           'captured_stdout', 'ensure_dir',
+           'get_installed_version', 'remove_auth_from_url']
+
+
+logger = logging.getLogger(__name__)
+
+
+def get_pip_version():
+    # type: () -> str
+    pip_pkg_dir = os.path.join(os.path.dirname(__file__), "..", "..")
+    pip_pkg_dir = os.path.abspath(pip_pkg_dir)
+
+    return (
+        'pip {} from {} (python {})'.format(
+            __version__, pip_pkg_dir, get_major_minor_version(),
+        )
+    )
+
+
+def normalize_version_info(py_version_info):
+    # type: (Tuple[int, ...]) -> Tuple[int, int, int]
+    """
+    Convert a tuple of ints representing a Python version to one of length
+    three.
+
+    :param py_version_info: a tuple of ints representing a Python version,
+        or None to specify no version. The tuple can have any length.
+
+    :return: a tuple of length three if `py_version_info` is non-None.
+        Otherwise, return `py_version_info` unchanged (i.e. None).
+    """
+    if len(py_version_info) < 3:
+        py_version_info += (3 - len(py_version_info)) * (0,)
+    elif len(py_version_info) > 3:
+        py_version_info = py_version_info[:3]
+
+    return cast('VersionInfo', py_version_info)
+
+
+def ensure_dir(path):
+    # type: (AnyStr) -> None
+    """os.path.makedirs without EEXIST."""
+    try:
+        os.makedirs(path)
+    except OSError as e:
+        # Windows can raise spurious ENOTEMPTY errors. See #6426.
+        if e.errno != errno.EEXIST and e.errno != errno.ENOTEMPTY:
+            raise
+
+
+def get_prog():
+    # type: () -> str
+    try:
+        prog = os.path.basename(sys.argv[0])
+        if prog in ('__main__.py', '-c'):
+            return "{} -m pip".format(sys.executable)
+        else:
+            return prog
+    except (AttributeError, TypeError, IndexError):
+        pass
+    return 'pip'
+
+
+# Retry every half second for up to 3 seconds
+@retry(stop_max_delay=3000, wait_fixed=500)
+def rmtree(dir, ignore_errors=False):
+    # type: (Text, bool) -> None
+    shutil.rmtree(dir, ignore_errors=ignore_errors,
+                  onerror=rmtree_errorhandler)
+
+
+def rmtree_errorhandler(func, path, exc_info):
+    """On Windows, the files in .svn are read-only, so when rmtree() tries to
+    remove them, an exception is thrown.  We catch that here, remove the
+    read-only attribute, and hopefully continue without problems."""
+    try:
+        has_attr_readonly = not (os.stat(path).st_mode & stat.S_IWRITE)
+    except (IOError, OSError):
+        # it's equivalent to os.path.exists
+        return
+
+    if has_attr_readonly:
+        # convert to read/write
+        os.chmod(path, stat.S_IWRITE)
+        # use the original function to repeat the operation
+        func(path)
+        return
+    else:
+        raise
+
+
+def path_to_display(path):
+    # type: (Optional[Union[str, Text]]) -> Optional[Text]
+    """
+    Convert a bytes (or text) path to text (unicode in Python 2) for display
+    and logging purposes.
+
+    This function should never error out. Also, this function is mainly needed
+    for Python 2 since in Python 3 str paths are already text.
+    """
+    if path is None:
+        return None
+    if isinstance(path, text_type):
+        return path
+    # Otherwise, path is a bytes object (str in Python 2).
+    try:
+        display_path = path.decode(sys.getfilesystemencoding(), 'strict')
+    except UnicodeDecodeError:
+        # Include the full bytes to make troubleshooting easier, even though
+        # it may not be very human readable.
+        if PY2:
+            # Convert the bytes to a readable str representation using
+            # repr(), and then convert the str to unicode.
+            #   Also, we add the prefix "b" to the repr() return value both
+            # to make the Python 2 output look like the Python 3 output, and
+            # to signal to the user that this is a bytes representation.
+            display_path = str_to_display('b{!r}'.format(path))
+        else:
+            # Silence the "F821 undefined name 'ascii'" flake8 error since
+            # in Python 3 ascii() is a built-in.
+            display_path = ascii(path)  # noqa: F821
+
+    return display_path
+
+
+def display_path(path):
+    # type: (Union[str, Text]) -> str
+    """Gives the display value for a given path, making it relative to cwd
+    if possible."""
+    path = os.path.normcase(os.path.abspath(path))
+    if sys.version_info[0] == 2:
+        path = path.decode(sys.getfilesystemencoding(), 'replace')
+        path = path.encode(sys.getdefaultencoding(), 'replace')
+    if path.startswith(os.getcwd() + os.path.sep):
+        path = '.' + path[len(os.getcwd()):]
+    return path
+
+
+def backup_dir(dir, ext='.bak'):
+    # type: (str, str) -> str
+    """Figure out the name of a directory to back up the given dir to
+    (adding .bak, .bak2, etc)"""
+    n = 1
+    extension = ext
+    while os.path.exists(dir + extension):
+        n += 1
+        extension = ext + str(n)
+    return dir + extension
+
+
+def ask_path_exists(message, options):
+    # type: (str, Iterable[str]) -> str
+    for action in os.environ.get('PIP_EXISTS_ACTION', '').split():
+        if action in options:
+            return action
+    return ask(message, options)
+
+
+def _check_no_input(message):
+    # type: (str) -> None
+    """Raise an error if no input is allowed."""
+    if os.environ.get('PIP_NO_INPUT'):
+        raise Exception(
+            'No input was expected ($PIP_NO_INPUT set); question: {}'.format(
+                message)
+        )
+
+
+def ask(message, options):
+    # type: (str, Iterable[str]) -> str
+    """Ask the message interactively, with the given possible responses"""
+    while 1:
+        _check_no_input(message)
+        response = input(message)
+        response = response.strip().lower()
+        if response not in options:
+            print(
+                'Your response ({!r}) was not one of the expected responses: '
+                '{}'.format(response, ', '.join(options))
+            )
+        else:
+            return response
+
+
+def ask_input(message):
+    # type: (str) -> str
+    """Ask for input interactively."""
+    _check_no_input(message)
+    return input(message)
+
+
+def ask_password(message):
+    # type: (str) -> str
+    """Ask for a password interactively."""
+    _check_no_input(message)
+    return getpass.getpass(message)
+
+
+def format_size(bytes):
+    # type: (float) -> str
+    if bytes > 1000 * 1000:
+        return '{:.1f} MB'.format(bytes / 1000.0 / 1000)
+    elif bytes > 10 * 1000:
+        return '{} kB'.format(int(bytes / 1000))
+    elif bytes > 1000:
+        return '{:.1f} kB'.format(bytes / 1000.0)
+    else:
+        return '{} bytes'.format(int(bytes))
+
+
+def tabulate(rows):
+    # type: (Iterable[Iterable[Any]]) -> Tuple[List[str], List[int]]
+    """Return a list of formatted rows and a list of column sizes.
+
+    For example::
+
+    >>> tabulate([['foobar', 2000], [0xdeadbeef]])
+    (['foobar     2000', '3735928559'], [10, 4])
+    """
+    rows = [tuple(map(str, row)) for row in rows]
+    sizes = [max(map(len, col)) for col in zip_longest(*rows, fillvalue='')]
+    table = [" ".join(map(str.ljust, row, sizes)).rstrip() for row in rows]
+    return table, sizes
+
+
+def is_installable_dir(path):
+    # type: (str) -> bool
+    """Is path is a directory containing setup.py or pyproject.toml?
+    """
+    if not os.path.isdir(path):
+        return False
+    setup_py = os.path.join(path, 'setup.py')
+    if os.path.isfile(setup_py):
+        return True
+    pyproject_toml = os.path.join(path, 'pyproject.toml')
+    if os.path.isfile(pyproject_toml):
+        return True
+    return False
+
+
+def read_chunks(file, size=io.DEFAULT_BUFFER_SIZE):
+    """Yield pieces of data from a file-like object until EOF."""
+    while True:
+        chunk = file.read(size)
+        if not chunk:
+            break
+        yield chunk
+
+
+def normalize_path(path, resolve_symlinks=True):
+    # type: (str, bool) -> str
+    """
+    Convert a path to its canonical, case-normalized, absolute version.
+
+    """
+    path = expanduser(path)
+    if resolve_symlinks:
+        path = os.path.realpath(path)
+    else:
+        path = os.path.abspath(path)
+    return os.path.normcase(path)
+
+
+def splitext(path):
+    # type: (str) -> Tuple[str, str]
+    """Like os.path.splitext, but take off .tar too"""
+    base, ext = posixpath.splitext(path)
+    if base.lower().endswith('.tar'):
+        ext = base[-4:] + ext
+        base = base[:-4]
+    return base, ext
+
+
+def renames(old, new):
+    # type: (str, str) -> None
+    """Like os.renames(), but handles renaming across devices."""
+    # Implementation borrowed from os.renames().
+    head, tail = os.path.split(new)
+    if head and tail and not os.path.exists(head):
+        os.makedirs(head)
+
+    shutil.move(old, new)
+
+    head, tail = os.path.split(old)
+    if head and tail:
+        try:
+            os.removedirs(head)
+        except OSError:
+            pass
+
+
+def is_local(path):
+    # type: (str) -> bool
+    """
+    Return True if path is within sys.prefix, if we're running in a virtualenv.
+
+    If we're not in a virtualenv, all paths are considered "local."
+
+    Caution: this function assumes the head of path has been normalized
+    with normalize_path.
+    """
+    if not running_under_virtualenv():
+        return True
+    return path.startswith(normalize_path(sys.prefix))
+
+
+def dist_is_local(dist):
+    # type: (Distribution) -> bool
+    """
+    Return True if given Distribution object is installed locally
+    (i.e. within current virtualenv).
+
+    Always True if we're not in a virtualenv.
+
+    """
+    return is_local(dist_location(dist))
+
+
+def dist_in_usersite(dist):
+    # type: (Distribution) -> bool
+    """
+    Return True if given Distribution is installed in user site.
+    """
+    return dist_location(dist).startswith(normalize_path(user_site))
+
+
+def dist_in_site_packages(dist):
+    # type: (Distribution) -> bool
+    """
+    Return True if given Distribution is installed in
+    sysconfig.get_python_lib().
+    """
+    return dist_location(dist).startswith(normalize_path(site_packages))
+
+
+def dist_is_editable(dist):
+    # type: (Distribution) -> bool
+    """
+    Return True if given Distribution is an editable install.
+    """
+    for path_item in sys.path:
+        egg_link = os.path.join(path_item, dist.project_name + '.egg-link')
+        if os.path.isfile(egg_link):
+            return True
+    return False
+
+
+def get_installed_distributions(
+        local_only=True,  # type: bool
+        skip=stdlib_pkgs,  # type: Container[str]
+        include_editables=True,  # type: bool
+        editables_only=False,  # type: bool
+        user_only=False,  # type: bool
+        paths=None  # type: Optional[List[str]]
+):
+    # type: (...) -> List[Distribution]
+    """
+    Return a list of installed Distribution objects.
+
+    If ``local_only`` is True (default), only return installations
+    local to the current virtualenv, if in a virtualenv.
+
+    ``skip`` argument is an iterable of lower-case project names to
+    ignore; defaults to stdlib_pkgs
+
+    If ``include_editables`` is False, don't report editables.
+
+    If ``editables_only`` is True , only report editables.
+
+    If ``user_only`` is True , only report installations in the user
+    site directory.
+
+    If ``paths`` is set, only report the distributions present at the
+    specified list of locations.
+    """
+    if paths:
+        working_set = pkg_resources.WorkingSet(paths)
+    else:
+        working_set = pkg_resources.working_set
+
+    if local_only:
+        local_test = dist_is_local
+    else:
+        def local_test(d):
+            return True
+
+    if include_editables:
+        def editable_test(d):
+            return True
+    else:
+        def editable_test(d):
+            return not dist_is_editable(d)
+
+    if editables_only:
+        def editables_only_test(d):
+            return dist_is_editable(d)
+    else:
+        def editables_only_test(d):
+            return True
+
+    if user_only:
+        user_test = dist_in_usersite
+    else:
+        def user_test(d):
+            return True
+
+    return [d for d in working_set
+            if local_test(d) and
+            d.key not in skip and
+            editable_test(d) and
+            editables_only_test(d) and
+            user_test(d)
+            ]
+
+
+def _search_distribution(req_name):
+    # type: (str) -> Optional[Distribution]
+    """Find a distribution matching the ``req_name`` in the environment.
+
+    This searches from *all* distributions available in the environment, to
+    match the behavior of ``pkg_resources.get_distribution()``.
+    """
+    # Canonicalize the name before searching in the list of
+    # installed distributions and also while creating the package
+    # dictionary to get the Distribution object
+    req_name = canonicalize_name(req_name)
+    packages = get_installed_distributions(
+        local_only=False,
+        skip=(),
+        include_editables=True,
+        editables_only=False,
+        user_only=False,
+        paths=None,
+    )
+    pkg_dict = {canonicalize_name(p.key): p for p in packages}
+    return pkg_dict.get(req_name)
+
+
+def get_distribution(req_name):
+    # type: (str) -> Optional[Distribution]
+    """Given a requirement name, return the installed Distribution object.
+
+    This searches from *all* distributions available in the environment, to
+    match the behavior of ``pkg_resources.get_distribution()``.
+    """
+
+    # Search the distribution by looking through the working set
+    dist = _search_distribution(req_name)
+
+    # If distribution could not be found, call working_set.require
+    # to update the working set, and try to find the distribution
+    # again.
+    # This might happen for e.g. when you install a package
+    # twice, once using setup.py develop and again using setup.py install.
+    # Now when run pip uninstall twice, the package gets removed
+    # from the working set in the first uninstall, so we have to populate
+    # the working set again so that pip knows about it and the packages
+    # gets picked up and is successfully uninstalled the second time too.
+    if not dist:
+        try:
+            pkg_resources.working_set.require(req_name)
+        except pkg_resources.DistributionNotFound:
+            return None
+    return _search_distribution(req_name)
+
+
+def egg_link_path(dist):
+    # type: (Distribution) -> Optional[str]
+    """
+    Return the path for the .egg-link file if it exists, otherwise, None.
+
+    There's 3 scenarios:
+    1) not in a virtualenv
+       try to find in site.USER_SITE, then site_packages
+    2) in a no-global virtualenv
+       try to find in site_packages
+    3) in a yes-global virtualenv
+       try to find in site_packages, then site.USER_SITE
+       (don't look in global location)
+
+    For #1 and #3, there could be odd cases, where there's an egg-link in 2
+    locations.
+
+    This method will just return the first one found.
+    """
+    sites = []
+    if running_under_virtualenv():
+        sites.append(site_packages)
+        if not virtualenv_no_global() and user_site:
+            sites.append(user_site)
+    else:
+        if user_site:
+            sites.append(user_site)
+        sites.append(site_packages)
+
+    for site in sites:
+        egglink = os.path.join(site, dist.project_name) + '.egg-link'
+        if os.path.isfile(egglink):
+            return egglink
+    return None
+
+
+def dist_location(dist):
+    # type: (Distribution) -> str
+    """
+    Get the site-packages location of this distribution. Generally
+    this is dist.location, except in the case of develop-installed
+    packages, where dist.location is the source code location, and we
+    want to know where the egg-link file is.
+
+    The returned location is normalized (in particular, with symlinks removed).
+    """
+    egg_link = egg_link_path(dist)
+    if egg_link:
+        return normalize_path(egg_link)
+    return normalize_path(dist.location)
+
+
+def write_output(msg, *args):
+    # type: (Any, Any) -> None
+    logger.info(msg, *args)
+
+
+class FakeFile(object):
+    """Wrap a list of lines in an object with readline() to make
+    ConfigParser happy."""
+    def __init__(self, lines):
+        self._gen = iter(lines)
+
+    def readline(self):
+        try:
+            return next(self._gen)
+        except StopIteration:
+            return ''
+
+    def __iter__(self):
+        return self._gen
+
+
+class StreamWrapper(StringIO):
+
+    @classmethod
+    def from_stream(cls, orig_stream):
+        cls.orig_stream = orig_stream
+        return cls()
+
+    # compileall.compile_dir() needs stdout.encoding to print to stdout
+    @property
+    def encoding(self):
+        return self.orig_stream.encoding
+
+
+@contextlib.contextmanager
+def captured_output(stream_name):
+    """Return a context manager used by captured_stdout/stdin/stderr
+    that temporarily replaces the sys stream *stream_name* with a StringIO.
+
+    Taken from Lib/support/__init__.py in the CPython repo.
+    """
+    orig_stdout = getattr(sys, stream_name)
+    setattr(sys, stream_name, StreamWrapper.from_stream(orig_stdout))
+    try:
+        yield getattr(sys, stream_name)
+    finally:
+        setattr(sys, stream_name, orig_stdout)
+
+
+def captured_stdout():
+    """Capture the output of sys.stdout:
+
+       with captured_stdout() as stdout:
+           print('hello')
+       self.assertEqual(stdout.getvalue(), 'hello\n')
+
+    Taken from Lib/support/__init__.py in the CPython repo.
+    """
+    return captured_output('stdout')
+
+
+def captured_stderr():
+    """
+    See captured_stdout().
+    """
+    return captured_output('stderr')
+
+
+def get_installed_version(dist_name, working_set=None):
+    """Get the installed version of dist_name avoiding pkg_resources cache"""
+    # Create a requirement that we'll look for inside of setuptools.
+    req = pkg_resources.Requirement.parse(dist_name)
+
+    if working_set is None:
+        # We want to avoid having this cached, so we need to construct a new
+        # working set each time.
+        working_set = pkg_resources.WorkingSet()
+
+    # Get the installed distribution from our working set
+    dist = working_set.find(req)
+
+    # Check to see if we got an installed distribution or not, if we did
+    # we want to return it's version.
+    return dist.version if dist else None
+
+
+def consume(iterator):
+    """Consume an iterable at C speed."""
+    deque(iterator, maxlen=0)
+
+
+# Simulates an enum
+def enum(*sequential, **named):
+    enums = dict(zip(sequential, range(len(sequential))), **named)
+    reverse = {value: key for key, value in enums.items()}
+    enums['reverse_mapping'] = reverse
+    return type('Enum', (), enums)
+
+
+def build_netloc(host, port):
+    # type: (str, Optional[int]) -> str
+    """
+    Build a netloc from a host-port pair
+    """
+    if port is None:
+        return host
+    if ':' in host:
+        # Only wrap host with square brackets when it is IPv6
+        host = '[{}]'.format(host)
+    return '{}:{}'.format(host, port)
+
+
+def build_url_from_netloc(netloc, scheme='https'):
+    # type: (str, str) -> str
+    """
+    Build a full URL from a netloc.
+    """
+    if netloc.count(':') >= 2 and '@' not in netloc and '[' not in netloc:
+        # It must be a bare IPv6 address, so wrap it with brackets.
+        netloc = '[{}]'.format(netloc)
+    return '{}://{}'.format(scheme, netloc)
+
+
+def parse_netloc(netloc):
+    # type: (str) -> Tuple[str, Optional[int]]
+    """
+    Return the host-port pair from a netloc.
+    """
+    url = build_url_from_netloc(netloc)
+    parsed = urllib_parse.urlparse(url)
+    return parsed.hostname, parsed.port
+
+
+def split_auth_from_netloc(netloc):
+    """
+    Parse out and remove the auth information from a netloc.
+
+    Returns: (netloc, (username, password)).
+    """
+    if '@' not in netloc:
+        return netloc, (None, None)
+
+    # Split from the right because that's how urllib.parse.urlsplit()
+    # behaves if more than one @ is present (which can be checked using
+    # the password attribute of urlsplit()'s return value).
+    auth, netloc = netloc.rsplit('@', 1)
+    if ':' in auth:
+        # Split from the left because that's how urllib.parse.urlsplit()
+        # behaves if more than one : is present (which again can be checked
+        # using the password attribute of the return value)
+        user_pass = auth.split(':', 1)
+    else:
+        user_pass = auth, None
+
+    user_pass = tuple(
+        None if x is None else urllib_unquote(x) for x in user_pass
+    )
+
+    return netloc, user_pass
+
+
+def redact_netloc(netloc):
+    # type: (str) -> str
+    """
+    Replace the sensitive data in a netloc with "****", if it exists.
+
+    For example:
+        - "user:pass@example.com" returns "user:****@example.com"
+        - "accesstoken@example.com" returns "****@example.com"
+    """
+    netloc, (user, password) = split_auth_from_netloc(netloc)
+    if user is None:
+        return netloc
+    if password is None:
+        user = '****'
+        password = ''
+    else:
+        user = urllib_parse.quote(user)
+        password = ':****'
+    return '{user}{password}@{netloc}'.format(user=user,
+                                              password=password,
+                                              netloc=netloc)
+
+
+def _transform_url(url, transform_netloc):
+    """Transform and replace netloc in a url.
+
+    transform_netloc is a function taking the netloc and returning a
+    tuple. The first element of this tuple is the new netloc. The
+    entire tuple is returned.
+
+    Returns a tuple containing the transformed url as item 0 and the
+    original tuple returned by transform_netloc as item 1.
+    """
+    purl = urllib_parse.urlsplit(url)
+    netloc_tuple = transform_netloc(purl.netloc)
+    # stripped url
+    url_pieces = (
+        purl.scheme, netloc_tuple[0], purl.path, purl.query, purl.fragment
+    )
+    surl = urllib_parse.urlunsplit(url_pieces)
+    return surl, netloc_tuple
+
+
+def _get_netloc(netloc):
+    return split_auth_from_netloc(netloc)
+
+
+def _redact_netloc(netloc):
+    return (redact_netloc(netloc),)
+
+
+def split_auth_netloc_from_url(url):
+    # type: (str) -> Tuple[str, str, Tuple[str, str]]
+    """
+    Parse a url into separate netloc, auth, and url with no auth.
+
+    Returns: (url_without_auth, netloc, (username, password))
+    """
+    url_without_auth, (netloc, auth) = _transform_url(url, _get_netloc)
+    return url_without_auth, netloc, auth
+
+
+def remove_auth_from_url(url):
+    # type: (str) -> str
+    """Return a copy of url with 'username:password@' removed."""
+    # username/pass params are passed to subversion through flags
+    # and are not recognized in the url.
+    return _transform_url(url, _get_netloc)[0]
+
+
+def redact_auth_from_url(url):
+    # type: (str) -> str
+    """Replace the password in a given url with ****."""
+    return _transform_url(url, _redact_netloc)[0]
+
+
+class HiddenText(object):
+    def __init__(
+        self,
+        secret,    # type: str
+        redacted,  # type: str
+    ):
+        # type: (...) -> None
+        self.secret = secret
+        self.redacted = redacted
+
+    def __repr__(self):
+        # type: (...) -> str
+        return '<HiddenText {!r}>'.format(str(self))
+
+    def __str__(self):
+        # type: (...) -> str
+        return self.redacted
+
+    # This is useful for testing.
+    def __eq__(self, other):
+        # type: (Any) -> bool
+        if type(self) != type(other):
+            return False
+
+        # The string being used for redaction doesn't also have to match,
+        # just the raw, original string.
+        return (self.secret == other.secret)
+
+    # We need to provide an explicit __ne__ implementation for Python 2.
+    # TODO: remove this when we drop PY2 support.
+    def __ne__(self, other):
+        # type: (Any) -> bool
+        return not self == other
+
+
+def hide_value(value):
+    # type: (str) -> HiddenText
+    return HiddenText(value, redacted='****')
+
+
+def hide_url(url):
+    # type: (str) -> HiddenText
+    redacted = redact_auth_from_url(url)
+    return HiddenText(url, redacted=redacted)
+
+
+def protect_pip_from_modification_on_windows(modifying_pip):
+    # type: (bool) -> None
+    """Protection of pip.exe from modification on Windows
+
+    On Windows, any operation modifying pip should be run as:
+        python -m pip ...
+    """
+    pip_names = [
+        "pip.exe",
+        "pip{}.exe".format(sys.version_info[0]),
+        "pip{}.{}.exe".format(*sys.version_info[:2])
+    ]
+
+    # See https://github.com/pypa/pip/issues/1299 for more discussion
+    should_show_use_python_msg = (
+        modifying_pip and
+        WINDOWS and
+        os.path.basename(sys.argv[0]) in pip_names
+    )
+
+    if should_show_use_python_msg:
+        new_command = [
+            sys.executable, "-m", "pip"
+        ] + sys.argv[1:]
+        raise CommandError(
+            'To modify pip, please run the following command:\n{}'
+            .format(" ".join(new_command))
+        )
+
+
+def is_console_interactive():
+    # type: () -> bool
+    """Is this console interactive?
+    """
+    return sys.stdin is not None and sys.stdin.isatty()
+
+
+def hash_file(path, blocksize=1 << 20):
+    # type: (Text, int) -> Tuple[Any, int]
+    """Return (hash, length) for path using hashlib.sha256()
+    """
+
+    h = hashlib.sha256()
+    length = 0
+    with open(path, 'rb') as f:
+        for block in read_chunks(f, size=blocksize):
+            length += len(block)
+            h.update(block)
+    return h, length
+
+
+def is_wheel_installed():
+    """
+    Return whether the wheel package is installed.
+    """
+    try:
+        import wheel  # noqa: F401
+    except ImportError:
+        return False
+
+    return True
+
+
+def pairwise(iterable):
+    # type: (Iterable[Any]) -> Iterator[Tuple[Any, Any]]
+    """
+    Return paired elements.
+
+    For example:
+        s -> (s0, s1), (s2, s3), (s4, s5), ...
+    """
+    iterable = iter(iterable)
+    return zip_longest(iterable, iterable)
+
+
+def partition(
+    pred,  # type: Callable[[T], bool]
+    iterable,  # type: Iterable[T]
+):
+    # type: (...) -> Tuple[Iterable[T], Iterable[T]]
+    """
+    Use a predicate to partition entries into false entries and true entries,
+    like
+
+        partition(is_odd, range(10)) --> 0 2 4 6 8   and  1 3 5 7 9
+    """
+    t1, t2 = tee(iterable)
+    return filterfalse(pred, t1), filter(pred, t2)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/models.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/models.py
new file mode 100644
index 0000000..d1c2f22
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/models.py
@@ -0,0 +1,44 @@
+"""Utilities for defining models
+"""
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+import operator
+
+
+class KeyBasedCompareMixin(object):
+    """Provides comparison capabilities that is based on a key
+    """
+
+    __slots__ = ['_compare_key', '_defining_class']
+
+    def __init__(self, key, defining_class):
+        self._compare_key = key
+        self._defining_class = defining_class
+
+    def __hash__(self):
+        return hash(self._compare_key)
+
+    def __lt__(self, other):
+        return self._compare(other, operator.__lt__)
+
+    def __le__(self, other):
+        return self._compare(other, operator.__le__)
+
+    def __gt__(self, other):
+        return self._compare(other, operator.__gt__)
+
+    def __ge__(self, other):
+        return self._compare(other, operator.__ge__)
+
+    def __eq__(self, other):
+        return self._compare(other, operator.__eq__)
+
+    def __ne__(self, other):
+        return self._compare(other, operator.__ne__)
+
+    def _compare(self, other, method):
+        if not isinstance(other, self._defining_class):
+            return NotImplemented
+
+        return method(self._compare_key, other._compare_key)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/packaging.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/packaging.py
new file mode 100644
index 0000000..68aa86e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/packaging.py
@@ -0,0 +1,94 @@
+from __future__ import absolute_import
+
+import logging
+from email.parser import FeedParser
+
+from pip._vendor import pkg_resources
+from pip._vendor.packaging import specifiers, version
+
+from pip._internal.exceptions import NoneMetadataError
+from pip._internal.utils.misc import display_path
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Tuple
+    from email.message import Message
+    from pip._vendor.pkg_resources import Distribution
+
+
+logger = logging.getLogger(__name__)
+
+
+def check_requires_python(requires_python, version_info):
+    # type: (Optional[str], Tuple[int, ...]) -> bool
+    """
+    Check if the given Python version matches a "Requires-Python" specifier.
+
+    :param version_info: A 3-tuple of ints representing a Python
+        major-minor-micro version to check (e.g. `sys.version_info[:3]`).
+
+    :return: `True` if the given Python version satisfies the requirement.
+        Otherwise, return `False`.
+
+    :raises InvalidSpecifier: If `requires_python` has an invalid format.
+    """
+    if requires_python is None:
+        # The package provides no information
+        return True
+    requires_python_specifier = specifiers.SpecifierSet(requires_python)
+
+    python_version = version.parse('.'.join(map(str, version_info)))
+    return python_version in requires_python_specifier
+
+
+def get_metadata(dist):
+    # type: (Distribution) -> Message
+    """
+    :raises NoneMetadataError: if the distribution reports `has_metadata()`
+        True but `get_metadata()` returns None.
+    """
+    metadata_name = 'METADATA'
+    if (isinstance(dist, pkg_resources.DistInfoDistribution) and
+            dist.has_metadata(metadata_name)):
+        metadata = dist.get_metadata(metadata_name)
+    elif dist.has_metadata('PKG-INFO'):
+        metadata_name = 'PKG-INFO'
+        metadata = dist.get_metadata(metadata_name)
+    else:
+        logger.warning("No metadata found in %s", display_path(dist.location))
+        metadata = ''
+
+    if metadata is None:
+        raise NoneMetadataError(dist, metadata_name)
+
+    feed_parser = FeedParser()
+    # The following line errors out if with a "NoneType" TypeError if
+    # passed metadata=None.
+    feed_parser.feed(metadata)
+    return feed_parser.close()
+
+
+def get_requires_python(dist):
+    # type: (pkg_resources.Distribution) -> Optional[str]
+    """
+    Return the "Requires-Python" metadata for a distribution, or None
+    if not present.
+    """
+    pkg_info_dict = get_metadata(dist)
+    requires_python = pkg_info_dict.get('Requires-Python')
+
+    if requires_python is not None:
+        # Convert to a str to satisfy the type checker, since requires_python
+        # can be a Header object.
+        requires_python = str(requires_python)
+
+    return requires_python
+
+
+def get_installer(dist):
+    # type: (Distribution) -> str
+    if dist.has_metadata('INSTALLER'):
+        for line in dist.get_metadata_lines('INSTALLER'):
+            if line.strip():
+                return line.strip()
+    return ''
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/parallel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/parallel.py
new file mode 100644
index 0000000..9fe1fe8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/parallel.py
@@ -0,0 +1,107 @@
+"""Convenient parallelization of higher order functions.
+
+This module provides two helper functions, with appropriate fallbacks on
+Python 2 and on systems lacking support for synchronization mechanisms:
+
+- map_multiprocess
+- map_multithread
+
+These helpers work like Python 3's map, with two differences:
+
+- They don't guarantee the order of processing of
+  the elements of the iterable.
+- The underlying process/thread pools chop the iterable into
+  a number of chunks, so that for very long iterables using
+  a large value for chunksize can make the job complete much faster
+  than using the default value of 1.
+"""
+
+__all__ = ['map_multiprocess', 'map_multithread']
+
+from contextlib import contextmanager
+from multiprocessing import Pool as ProcessPool
+from multiprocessing.dummy import Pool as ThreadPool
+
+from pip._vendor.requests.adapters import DEFAULT_POOLSIZE
+from pip._vendor.six import PY2
+from pip._vendor.six.moves import map
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Callable, Iterable, Iterator, Union, TypeVar
+    from multiprocessing import pool
+
+    Pool = Union[pool.Pool, pool.ThreadPool]
+    S = TypeVar('S')
+    T = TypeVar('T')
+
+# On platforms without sem_open, multiprocessing[.dummy] Pool
+# cannot be created.
+try:
+    import multiprocessing.synchronize  # noqa
+except ImportError:
+    LACK_SEM_OPEN = True
+else:
+    LACK_SEM_OPEN = False
+
+# Incredibly large timeout to work around bpo-8296 on Python 2.
+TIMEOUT = 2000000
+
+
+@contextmanager
+def closing(pool):
+    # type: (Pool) -> Iterator[Pool]
+    """Return a context manager making sure the pool closes properly."""
+    try:
+        yield pool
+    finally:
+        # For Pool.imap*, close and join are needed
+        # for the returned iterator to begin yielding.
+        pool.close()
+        pool.join()
+        pool.terminate()
+
+
+def _map_fallback(func, iterable, chunksize=1):
+    # type: (Callable[[S], T], Iterable[S], int) -> Iterator[T]
+    """Make an iterator applying func to each element in iterable.
+
+    This function is the sequential fallback either on Python 2
+    where Pool.imap* doesn't react to KeyboardInterrupt
+    or when sem_open is unavailable.
+    """
+    return map(func, iterable)
+
+
+def _map_multiprocess(func, iterable, chunksize=1):
+    # type: (Callable[[S], T], Iterable[S], int) -> Iterator[T]
+    """Chop iterable into chunks and submit them to a process pool.
+
+    For very long iterables using a large value for chunksize can make
+    the job complete much faster than using the default value of 1.
+
+    Return an unordered iterator of the results.
+    """
+    with closing(ProcessPool()) as pool:
+        return pool.imap_unordered(func, iterable, chunksize)
+
+
+def _map_multithread(func, iterable, chunksize=1):
+    # type: (Callable[[S], T], Iterable[S], int) -> Iterator[T]
+    """Chop iterable into chunks and submit them to a thread pool.
+
+    For very long iterables using a large value for chunksize can make
+    the job complete much faster than using the default value of 1.
+
+    Return an unordered iterator of the results.
+    """
+    with closing(ThreadPool(DEFAULT_POOLSIZE)) as pool:
+        return pool.imap_unordered(func, iterable, chunksize)
+
+
+if LACK_SEM_OPEN or PY2:
+    map_multiprocess = map_multithread = _map_fallback
+else:
+    map_multiprocess = _map_multiprocess
+    map_multithread = _map_multithread
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/pkg_resources.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/pkg_resources.py
new file mode 100644
index 0000000..0bc129a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/pkg_resources.py
@@ -0,0 +1,44 @@
+from pip._vendor.pkg_resources import yield_lines
+from pip._vendor.six import ensure_str
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Dict, Iterable, List
+
+
+class DictMetadata(object):
+    """IMetadataProvider that reads metadata files from a dictionary.
+    """
+    def __init__(self, metadata):
+        # type: (Dict[str, bytes]) -> None
+        self._metadata = metadata
+
+    def has_metadata(self, name):
+        # type: (str) -> bool
+        return name in self._metadata
+
+    def get_metadata(self, name):
+        # type: (str) -> str
+        try:
+            return ensure_str(self._metadata[name])
+        except UnicodeDecodeError as e:
+            # Mirrors handling done in pkg_resources.NullProvider.
+            e.reason += " in {} file".format(name)
+            raise
+
+    def get_metadata_lines(self, name):
+        # type: (str) -> Iterable[str]
+        return yield_lines(self.get_metadata(name))
+
+    def metadata_isdir(self, name):
+        # type: (str) -> bool
+        return False
+
+    def metadata_listdir(self, name):
+        # type: (str) -> List[str]
+        return []
+
+    def run_script(self, script_name, namespace):
+        # type: (str, str) -> None
+        pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/setuptools_build.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/setuptools_build.py
new file mode 100644
index 0000000..2a664b0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/setuptools_build.py
@@ -0,0 +1,181 @@
+import sys
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional, Sequence
+
+# Shim to wrap setup.py invocation with setuptools
+#
+# We set sys.argv[0] to the path to the underlying setup.py file so
+# setuptools / distutils don't take the path to the setup.py to be "-c" when
+# invoking via the shim.  This avoids e.g. the following manifest_maker
+# warning: "warning: manifest_maker: standard file '-c' not found".
+_SETUPTOOLS_SHIM = (
+    "import sys, setuptools, tokenize; sys.argv[0] = {0!r}; __file__={0!r};"
+    "f=getattr(tokenize, 'open', open)(__file__);"
+    "code=f.read().replace('\\r\\n', '\\n');"
+    "f.close();"
+    "exec(compile(code, __file__, 'exec'))"
+)
+
+
+def make_setuptools_shim_args(
+    setup_py_path,  # type: str
+    global_options=None,  # type: Sequence[str]
+    no_user_config=False,  # type: bool
+    unbuffered_output=False  # type: bool
+):
+    # type: (...) -> List[str]
+    """
+    Get setuptools command arguments with shim wrapped setup file invocation.
+
+    :param setup_py_path: The path to setup.py to be wrapped.
+    :param global_options: Additional global options.
+    :param no_user_config: If True, disables personal user configuration.
+    :param unbuffered_output: If True, adds the unbuffered switch to the
+     argument list.
+    """
+    args = [sys.executable]
+    if unbuffered_output:
+        args += ["-u"]
+    args += ["-c", _SETUPTOOLS_SHIM.format(setup_py_path)]
+    if global_options:
+        args += global_options
+    if no_user_config:
+        args += ["--no-user-cfg"]
+    return args
+
+
+def make_setuptools_bdist_wheel_args(
+    setup_py_path,  # type: str
+    global_options,  # type: Sequence[str]
+    build_options,  # type: Sequence[str]
+    destination_dir,  # type: str
+):
+    # type: (...) -> List[str]
+    # NOTE: Eventually, we'd want to also -S to the flags here, when we're
+    # isolating. Currently, it breaks Python in virtualenvs, because it
+    # relies on site.py to find parts of the standard library outside the
+    # virtualenv.
+    args = make_setuptools_shim_args(
+        setup_py_path,
+        global_options=global_options,
+        unbuffered_output=True
+    )
+    args += ["bdist_wheel", "-d", destination_dir]
+    args += build_options
+    return args
+
+
+def make_setuptools_clean_args(
+    setup_py_path,  # type: str
+    global_options,  # type: Sequence[str]
+):
+    # type: (...) -> List[str]
+    args = make_setuptools_shim_args(
+        setup_py_path,
+        global_options=global_options,
+        unbuffered_output=True
+    )
+    args += ["clean", "--all"]
+    return args
+
+
+def make_setuptools_develop_args(
+    setup_py_path,  # type: str
+    global_options,  # type: Sequence[str]
+    install_options,  # type: Sequence[str]
+    no_user_config,  # type: bool
+    prefix,  # type: Optional[str]
+    home,  # type: Optional[str]
+    use_user_site,  # type: bool
+):
+    # type: (...) -> List[str]
+    assert not (use_user_site and prefix)
+
+    args = make_setuptools_shim_args(
+        setup_py_path,
+        global_options=global_options,
+        no_user_config=no_user_config,
+    )
+
+    args += ["develop", "--no-deps"]
+
+    args += install_options
+
+    if prefix:
+        args += ["--prefix", prefix]
+    if home is not None:
+        args += ["--home", home]
+
+    if use_user_site:
+        args += ["--user", "--prefix="]
+
+    return args
+
+
+def make_setuptools_egg_info_args(
+    setup_py_path,  # type: str
+    egg_info_dir,  # type: Optional[str]
+    no_user_config,  # type: bool
+):
+    # type: (...) -> List[str]
+    args = make_setuptools_shim_args(
+        setup_py_path, no_user_config=no_user_config
+    )
+
+    args += ["egg_info"]
+
+    if egg_info_dir:
+        args += ["--egg-base", egg_info_dir]
+
+    return args
+
+
+def make_setuptools_install_args(
+    setup_py_path,  # type: str
+    global_options,  # type: Sequence[str]
+    install_options,  # type: Sequence[str]
+    record_filename,  # type: str
+    root,  # type: Optional[str]
+    prefix,  # type: Optional[str]
+    header_dir,  # type: Optional[str]
+    home,  # type: Optional[str]
+    use_user_site,  # type: bool
+    no_user_config,  # type: bool
+    pycompile  # type: bool
+):
+    # type: (...) -> List[str]
+    assert not (use_user_site and prefix)
+    assert not (use_user_site and root)
+
+    args = make_setuptools_shim_args(
+        setup_py_path,
+        global_options=global_options,
+        no_user_config=no_user_config,
+        unbuffered_output=True
+    )
+    args += ["install", "--record", record_filename]
+    args += ["--single-version-externally-managed"]
+
+    if root is not None:
+        args += ["--root", root]
+    if prefix is not None:
+        args += ["--prefix", prefix]
+    if home is not None:
+        args += ["--home", home]
+    if use_user_site:
+        args += ["--user", "--prefix="]
+
+    if pycompile:
+        args += ["--compile"]
+    else:
+        args += ["--no-compile"]
+
+    if header_dir:
+        args += ["--install-headers", header_dir]
+
+    args += install_options
+
+    return args
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/subprocess.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/subprocess.py
new file mode 100644
index 0000000..d398e68
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/subprocess.py
@@ -0,0 +1,280 @@
+from __future__ import absolute_import
+
+import logging
+import os
+import subprocess
+
+from pip._vendor.six.moves import shlex_quote
+
+from pip._internal.cli.spinners import SpinnerInterface, open_spinner
+from pip._internal.exceptions import InstallationError
+from pip._internal.utils.compat import console_to_str, str_to_display
+from pip._internal.utils.logging import subprocess_logger
+from pip._internal.utils.misc import HiddenText, path_to_display
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Callable, Iterable, List, Mapping, Optional, Text, Union,
+    )
+
+    CommandArgs = List[Union[str, HiddenText]]
+
+
+LOG_DIVIDER = '----------------------------------------'
+
+
+def make_command(*args):
+    # type: (Union[str, HiddenText, CommandArgs]) -> CommandArgs
+    """
+    Create a CommandArgs object.
+    """
+    command_args = []  # type: CommandArgs
+    for arg in args:
+        # Check for list instead of CommandArgs since CommandArgs is
+        # only known during type-checking.
+        if isinstance(arg, list):
+            command_args.extend(arg)
+        else:
+            # Otherwise, arg is str or HiddenText.
+            command_args.append(arg)
+
+    return command_args
+
+
+def format_command_args(args):
+    # type: (Union[List[str], CommandArgs]) -> str
+    """
+    Format command arguments for display.
+    """
+    # For HiddenText arguments, display the redacted form by calling str().
+    # Also, we don't apply str() to arguments that aren't HiddenText since
+    # this can trigger a UnicodeDecodeError in Python 2 if the argument
+    # has type unicode and includes a non-ascii character.  (The type
+    # checker doesn't ensure the annotations are correct in all cases.)
+    return ' '.join(
+        shlex_quote(str(arg)) if isinstance(arg, HiddenText)
+        else shlex_quote(arg) for arg in args
+    )
+
+
+def reveal_command_args(args):
+    # type: (Union[List[str], CommandArgs]) -> List[str]
+    """
+    Return the arguments in their raw, unredacted form.
+    """
+    return [
+        arg.secret if isinstance(arg, HiddenText) else arg for arg in args
+    ]
+
+
+def make_subprocess_output_error(
+    cmd_args,     # type: Union[List[str], CommandArgs]
+    cwd,          # type: Optional[str]
+    lines,        # type: List[Text]
+    exit_status,  # type: int
+):
+    # type: (...) -> Text
+    """
+    Create and return the error message to use to log a subprocess error
+    with command output.
+
+    :param lines: A list of lines, each ending with a newline.
+    """
+    command = format_command_args(cmd_args)
+    # Convert `command` and `cwd` to text (unicode in Python 2) so we can use
+    # them as arguments in the unicode format string below. This avoids
+    # "UnicodeDecodeError: 'ascii' codec can't decode byte ..." in Python 2
+    # if either contains a non-ascii character.
+    command_display = str_to_display(command, desc='command bytes')
+    cwd_display = path_to_display(cwd)
+
+    # We know the joined output value ends in a newline.
+    output = ''.join(lines)
+    msg = (
+        # Use a unicode string to avoid "UnicodeEncodeError: 'ascii'
+        # codec can't encode character ..." in Python 2 when a format
+        # argument (e.g. `output`) has a non-ascii character.
+        u'Command errored out with exit status {exit_status}:\n'
+        ' command: {command_display}\n'
+        '     cwd: {cwd_display}\n'
+        'Complete output ({line_count} lines):\n{output}{divider}'
+    ).format(
+        exit_status=exit_status,
+        command_display=command_display,
+        cwd_display=cwd_display,
+        line_count=len(lines),
+        output=output,
+        divider=LOG_DIVIDER,
+    )
+    return msg
+
+
+def call_subprocess(
+    cmd,  # type: Union[List[str], CommandArgs]
+    show_stdout=False,  # type: bool
+    cwd=None,  # type: Optional[str]
+    on_returncode='raise',  # type: str
+    extra_ok_returncodes=None,  # type: Optional[Iterable[int]]
+    command_desc=None,  # type: Optional[str]
+    extra_environ=None,  # type: Optional[Mapping[str, Any]]
+    unset_environ=None,  # type: Optional[Iterable[str]]
+    spinner=None,  # type: Optional[SpinnerInterface]
+    log_failed_cmd=True  # type: Optional[bool]
+):
+    # type: (...) -> Text
+    """
+    Args:
+      show_stdout: if true, use INFO to log the subprocess's stderr and
+        stdout streams.  Otherwise, use DEBUG.  Defaults to False.
+      extra_ok_returncodes: an iterable of integer return codes that are
+        acceptable, in addition to 0. Defaults to None, which means [].
+      unset_environ: an iterable of environment variable names to unset
+        prior to calling subprocess.Popen().
+      log_failed_cmd: if false, failed commands are not logged, only raised.
+    """
+    if extra_ok_returncodes is None:
+        extra_ok_returncodes = []
+    if unset_environ is None:
+        unset_environ = []
+    # Most places in pip use show_stdout=False. What this means is--
+    #
+    # - We connect the child's output (combined stderr and stdout) to a
+    #   single pipe, which we read.
+    # - We log this output to stderr at DEBUG level as it is received.
+    # - If DEBUG logging isn't enabled (e.g. if --verbose logging wasn't
+    #   requested), then we show a spinner so the user can still see the
+    #   subprocess is in progress.
+    # - If the subprocess exits with an error, we log the output to stderr
+    #   at ERROR level if it hasn't already been displayed to the console
+    #   (e.g. if --verbose logging wasn't enabled).  This way we don't log
+    #   the output to the console twice.
+    #
+    # If show_stdout=True, then the above is still done, but with DEBUG
+    # replaced by INFO.
+    if show_stdout:
+        # Then log the subprocess output at INFO level.
+        log_subprocess = subprocess_logger.info
+        used_level = logging.INFO
+    else:
+        # Then log the subprocess output using DEBUG.  This also ensures
+        # it will be logged to the log file (aka user_log), if enabled.
+        log_subprocess = subprocess_logger.debug
+        used_level = logging.DEBUG
+
+    # Whether the subprocess will be visible in the console.
+    showing_subprocess = subprocess_logger.getEffectiveLevel() <= used_level
+
+    # Only use the spinner if we're not showing the subprocess output
+    # and we have a spinner.
+    use_spinner = not showing_subprocess and spinner is not None
+
+    if command_desc is None:
+        command_desc = format_command_args(cmd)
+
+    log_subprocess("Running command %s", command_desc)
+    env = os.environ.copy()
+    if extra_environ:
+        env.update(extra_environ)
+    for name in unset_environ:
+        env.pop(name, None)
+    try:
+        proc = subprocess.Popen(
+            # Convert HiddenText objects to the underlying str.
+            reveal_command_args(cmd),
+            stderr=subprocess.STDOUT, stdin=subprocess.PIPE,
+            stdout=subprocess.PIPE, cwd=cwd, env=env,
+        )
+        assert proc.stdin
+        assert proc.stdout
+        proc.stdin.close()
+    except Exception as exc:
+        if log_failed_cmd:
+            subprocess_logger.critical(
+                "Error %s while executing command %s", exc, command_desc,
+            )
+        raise
+    all_output = []
+    while True:
+        # The "line" value is a unicode string in Python 2.
+        line = console_to_str(proc.stdout.readline())
+        if not line:
+            break
+        line = line.rstrip()
+        all_output.append(line + '\n')
+
+        # Show the line immediately.
+        log_subprocess(line)
+        # Update the spinner.
+        if use_spinner:
+            assert spinner
+            spinner.spin()
+    try:
+        proc.wait()
+    finally:
+        if proc.stdout:
+            proc.stdout.close()
+    proc_had_error = (
+        proc.returncode and proc.returncode not in extra_ok_returncodes
+    )
+    if use_spinner:
+        assert spinner
+        if proc_had_error:
+            spinner.finish("error")
+        else:
+            spinner.finish("done")
+    if proc_had_error:
+        if on_returncode == 'raise':
+            if not showing_subprocess and log_failed_cmd:
+                # Then the subprocess streams haven't been logged to the
+                # console yet.
+                msg = make_subprocess_output_error(
+                    cmd_args=cmd,
+                    cwd=cwd,
+                    lines=all_output,
+                    exit_status=proc.returncode,
+                )
+                subprocess_logger.error(msg)
+            exc_msg = (
+                'Command errored out with exit status {}: {} '
+                'Check the logs for full command output.'
+            ).format(proc.returncode, command_desc)
+            raise InstallationError(exc_msg)
+        elif on_returncode == 'warn':
+            subprocess_logger.warning(
+                'Command "%s" had error code %s in %s',
+                command_desc,
+                proc.returncode,
+                cwd,
+            )
+        elif on_returncode == 'ignore':
+            pass
+        else:
+            raise ValueError('Invalid value: on_returncode={!r}'.format(
+                             on_returncode))
+    return ''.join(all_output)
+
+
+def runner_with_spinner_message(message):
+    # type: (str) -> Callable[..., None]
+    """Provide a subprocess_runner that shows a spinner message.
+
+    Intended for use with for pep517's Pep517HookCaller. Thus, the runner has
+    an API that matches what's expected by Pep517HookCaller.subprocess_runner.
+    """
+
+    def runner(
+        cmd,  # type: List[str]
+        cwd=None,  # type: Optional[str]
+        extra_environ=None  # type: Optional[Mapping[str, Any]]
+    ):
+        # type: (...) -> None
+        with open_spinner(message) as spinner:
+            call_subprocess(
+                cmd,
+                cwd=cwd,
+                extra_environ=extra_environ,
+                spinner=spinner,
+            )
+
+    return runner
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/temp_dir.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/temp_dir.py
new file mode 100644
index 0000000..03aa828
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/temp_dir.py
@@ -0,0 +1,274 @@
+from __future__ import absolute_import
+
+import errno
+import itertools
+import logging
+import os.path
+import tempfile
+from contextlib import contextmanager
+
+from pip._vendor.contextlib2 import ExitStack
+from pip._vendor.six import ensure_text
+
+from pip._internal.utils.misc import enum, rmtree
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, Dict, Iterator, Optional, TypeVar, Union
+
+    _T = TypeVar('_T', bound='TempDirectory')
+
+
+logger = logging.getLogger(__name__)
+
+
+# Kinds of temporary directories. Only needed for ones that are
+# globally-managed.
+tempdir_kinds = enum(
+    BUILD_ENV="build-env",
+    EPHEM_WHEEL_CACHE="ephem-wheel-cache",
+    REQ_BUILD="req-build",
+)
+
+
+_tempdir_manager = None  # type: Optional[ExitStack]
+
+
+@contextmanager
+def global_tempdir_manager():
+    # type: () -> Iterator[None]
+    global _tempdir_manager
+    with ExitStack() as stack:
+        old_tempdir_manager, _tempdir_manager = _tempdir_manager, stack
+        try:
+            yield
+        finally:
+            _tempdir_manager = old_tempdir_manager
+
+
+class TempDirectoryTypeRegistry(object):
+    """Manages temp directory behavior
+    """
+
+    def __init__(self):
+        # type: () -> None
+        self._should_delete = {}  # type: Dict[str, bool]
+
+    def set_delete(self, kind, value):
+        # type: (str, bool) -> None
+        """Indicate whether a TempDirectory of the given kind should be
+        auto-deleted.
+        """
+        self._should_delete[kind] = value
+
+    def get_delete(self, kind):
+        # type: (str) -> bool
+        """Get configured auto-delete flag for a given TempDirectory type,
+        default True.
+        """
+        return self._should_delete.get(kind, True)
+
+
+_tempdir_registry = None  # type: Optional[TempDirectoryTypeRegistry]
+
+
+@contextmanager
+def tempdir_registry():
+    # type: () -> Iterator[TempDirectoryTypeRegistry]
+    """Provides a scoped global tempdir registry that can be used to dictate
+    whether directories should be deleted.
+    """
+    global _tempdir_registry
+    old_tempdir_registry = _tempdir_registry
+    _tempdir_registry = TempDirectoryTypeRegistry()
+    try:
+        yield _tempdir_registry
+    finally:
+        _tempdir_registry = old_tempdir_registry
+
+
+class _Default(object):
+    pass
+
+
+_default = _Default()
+
+
+class TempDirectory(object):
+    """Helper class that owns and cleans up a temporary directory.
+
+    This class can be used as a context manager or as an OO representation of a
+    temporary directory.
+
+    Attributes:
+        path
+            Location to the created temporary directory
+        delete
+            Whether the directory should be deleted when exiting
+            (when used as a contextmanager)
+
+    Methods:
+        cleanup()
+            Deletes the temporary directory
+
+    When used as a context manager, if the delete attribute is True, on
+    exiting the context the temporary directory is deleted.
+    """
+
+    def __init__(
+        self,
+        path=None,    # type: Optional[str]
+        delete=_default,  # type: Union[bool, None, _Default]
+        kind="temp",  # type: str
+        globally_managed=False,  # type: bool
+    ):
+        super(TempDirectory, self).__init__()
+
+        if delete is _default:
+            if path is not None:
+                # If we were given an explicit directory, resolve delete option
+                # now.
+                delete = False
+            else:
+                # Otherwise, we wait until cleanup and see what
+                # tempdir_registry says.
+                delete = None
+
+        if path is None:
+            path = self._create(kind)
+
+        self._path = path
+        self._deleted = False
+        self.delete = delete
+        self.kind = kind
+
+        if globally_managed:
+            assert _tempdir_manager is not None
+            _tempdir_manager.enter_context(self)
+
+    @property
+    def path(self):
+        # type: () -> str
+        assert not self._deleted, (
+            "Attempted to access deleted path: {}".format(self._path)
+        )
+        return self._path
+
+    def __repr__(self):
+        # type: () -> str
+        return "<{} {!r}>".format(self.__class__.__name__, self.path)
+
+    def __enter__(self):
+        # type: (_T) -> _T
+        return self
+
+    def __exit__(self, exc, value, tb):
+        # type: (Any, Any, Any) -> None
+        if self.delete is not None:
+            delete = self.delete
+        elif _tempdir_registry:
+            delete = _tempdir_registry.get_delete(self.kind)
+        else:
+            delete = True
+
+        if delete:
+            self.cleanup()
+
+    def _create(self, kind):
+        # type: (str) -> str
+        """Create a temporary directory and store its path in self.path
+        """
+        # We realpath here because some systems have their default tmpdir
+        # symlinked to another directory.  This tends to confuse build
+        # scripts, so we canonicalize the path by traversing potential
+        # symlinks here.
+        path = os.path.realpath(
+            tempfile.mkdtemp(prefix="pip-{}-".format(kind))
+        )
+        logger.debug("Created temporary directory: %s", path)
+        return path
+
+    def cleanup(self):
+        # type: () -> None
+        """Remove the temporary directory created and reset state
+        """
+        self._deleted = True
+        if os.path.exists(self._path):
+            # Make sure to pass unicode on Python 2 to make the contents also
+            # use unicode, ensuring non-ASCII names and can be represented.
+            rmtree(ensure_text(self._path))
+
+
+class AdjacentTempDirectory(TempDirectory):
+    """Helper class that creates a temporary directory adjacent to a real one.
+
+    Attributes:
+        original
+            The original directory to create a temp directory for.
+        path
+            After calling create() or entering, contains the full
+            path to the temporary directory.
+        delete
+            Whether the directory should be deleted when exiting
+            (when used as a contextmanager)
+
+    """
+    # The characters that may be used to name the temp directory
+    # We always prepend a ~ and then rotate through these until
+    # a usable name is found.
+    # pkg_resources raises a different error for .dist-info folder
+    # with leading '-' and invalid metadata
+    LEADING_CHARS = "-~.=%0123456789"
+
+    def __init__(self, original, delete=None):
+        # type: (str, Optional[bool]) -> None
+        self.original = original.rstrip('/\\')
+        super(AdjacentTempDirectory, self).__init__(delete=delete)
+
+    @classmethod
+    def _generate_names(cls, name):
+        # type: (str) -> Iterator[str]
+        """Generates a series of temporary names.
+
+        The algorithm replaces the leading characters in the name
+        with ones that are valid filesystem characters, but are not
+        valid package names (for both Python and pip definitions of
+        package).
+        """
+        for i in range(1, len(name)):
+            for candidate in itertools.combinations_with_replacement(
+                    cls.LEADING_CHARS, i - 1):
+                new_name = '~' + ''.join(candidate) + name[i:]
+                if new_name != name:
+                    yield new_name
+
+        # If we make it this far, we will have to make a longer name
+        for i in range(len(cls.LEADING_CHARS)):
+            for candidate in itertools.combinations_with_replacement(
+                    cls.LEADING_CHARS, i):
+                new_name = '~' + ''.join(candidate) + name
+                if new_name != name:
+                    yield new_name
+
+    def _create(self, kind):
+        # type: (str) -> str
+        root, name = os.path.split(self.original)
+        for candidate in self._generate_names(name):
+            path = os.path.join(root, candidate)
+            try:
+                os.mkdir(path)
+            except OSError as ex:
+                # Continue if the name exists already
+                if ex.errno != errno.EEXIST:
+                    raise
+            else:
+                path = os.path.realpath(path)
+                break
+        else:
+            # Final fallback on the default behavior.
+            path = os.path.realpath(
+                tempfile.mkdtemp(prefix="pip-{}-".format(kind))
+            )
+
+        logger.debug("Created temporary directory: %s", path)
+        return path
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/typing.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/typing.py
new file mode 100644
index 0000000..8505a29
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/typing.py
@@ -0,0 +1,38 @@
+"""For neatly implementing static typing in pip.
+
+`mypy` - the static type analysis tool we use - uses the `typing` module, which
+provides core functionality fundamental to mypy's functioning.
+
+Generally, `typing` would be imported at runtime and used in that fashion -
+it acts as a no-op at runtime and does not have any run-time overhead by
+design.
+
+As it turns out, `typing` is not vendorable - it uses separate sources for
+Python 2/Python 3. Thus, this codebase can not expect it to be present.
+To work around this, mypy allows the typing import to be behind a False-y
+optional to prevent it from running at runtime and type-comments can be used
+to remove the need for the types to be accessible directly during runtime.
+
+This module provides the False-y guard in a nicely named fashion so that a
+curious maintainer can reach here to read this.
+
+In pip, all static-typing related imports should be guarded as follows:
+
+    from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+    if MYPY_CHECK_RUNNING:
+        from typing import ...
+
+Ref: https://github.com/python/mypy/issues/3216
+"""
+
+MYPY_CHECK_RUNNING = False
+
+
+if MYPY_CHECK_RUNNING:
+    from typing import cast
+else:
+    # typing's cast() is needed at runtime, but we don't want to import typing.
+    # Thus, we use a dummy no-op version, which we tell mypy to ignore.
+    def cast(type_, value):  # type: ignore
+        return value
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/unpacking.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/unpacking.py
new file mode 100644
index 0000000..620f31e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/unpacking.py
@@ -0,0 +1,281 @@
+"""Utilities related archives.
+"""
+
+from __future__ import absolute_import
+
+import logging
+import os
+import shutil
+import stat
+import tarfile
+import zipfile
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.utils.filetypes import (
+    BZ2_EXTENSIONS,
+    TAR_EXTENSIONS,
+    XZ_EXTENSIONS,
+    ZIP_EXTENSIONS,
+)
+from pip._internal.utils.misc import ensure_dir
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Iterable, List, Optional, Text, Union
+    from zipfile import ZipInfo
+
+
+logger = logging.getLogger(__name__)
+
+
+SUPPORTED_EXTENSIONS = ZIP_EXTENSIONS + TAR_EXTENSIONS
+
+try:
+    import bz2  # noqa
+    SUPPORTED_EXTENSIONS += BZ2_EXTENSIONS
+except ImportError:
+    logger.debug('bz2 module is not available')
+
+try:
+    # Only for Python 3.3+
+    import lzma  # noqa
+    SUPPORTED_EXTENSIONS += XZ_EXTENSIONS
+except ImportError:
+    logger.debug('lzma module is not available')
+
+
+def current_umask():
+    # type: () -> int
+    """Get the current umask which involves having to set it temporarily."""
+    mask = os.umask(0)
+    os.umask(mask)
+    return mask
+
+
+def split_leading_dir(path):
+    # type: (Union[str, Text]) -> List[Union[str, Text]]
+    path = path.lstrip('/').lstrip('\\')
+    if (
+        '/' in path and (
+            ('\\' in path and path.find('/') < path.find('\\')) or
+            '\\' not in path
+        )
+    ):
+        return path.split('/', 1)
+    elif '\\' in path:
+        return path.split('\\', 1)
+    else:
+        return [path, '']
+
+
+def has_leading_dir(paths):
+    # type: (Iterable[Union[str, Text]]) -> bool
+    """Returns true if all the paths have the same leading path name
+    (i.e., everything is in one subdirectory in an archive)"""
+    common_prefix = None
+    for path in paths:
+        prefix, rest = split_leading_dir(path)
+        if not prefix:
+            return False
+        elif common_prefix is None:
+            common_prefix = prefix
+        elif prefix != common_prefix:
+            return False
+    return True
+
+
+def is_within_directory(directory, target):
+    # type: ((Union[str, Text]), (Union[str, Text])) -> bool
+    """
+    Return true if the absolute path of target is within the directory
+    """
+    abs_directory = os.path.abspath(directory)
+    abs_target = os.path.abspath(target)
+
+    prefix = os.path.commonprefix([abs_directory, abs_target])
+    return prefix == abs_directory
+
+
+def set_extracted_file_to_default_mode_plus_executable(path):
+    # type: (Union[str, Text]) -> None
+    """
+    Make file present at path have execute for user/group/world
+    (chmod +x) is no-op on windows per python docs
+    """
+    os.chmod(path, (0o777 & ~current_umask() | 0o111))
+
+
+def zip_item_is_executable(info):
+    # type: (ZipInfo) -> bool
+    mode = info.external_attr >> 16
+    # if mode and regular file and any execute permissions for
+    # user/group/world?
+    return bool(mode and stat.S_ISREG(mode) and mode & 0o111)
+
+
+def unzip_file(filename, location, flatten=True):
+    # type: (str, str, bool) -> None
+    """
+    Unzip the file (with path `filename`) to the destination `location`.  All
+    files are written based on system defaults and umask (i.e. permissions are
+    not preserved), except that regular file members with any execute
+    permissions (user, group, or world) have "chmod +x" applied after being
+    written. Note that for windows, any execute changes using os.chmod are
+    no-ops per the python docs.
+    """
+    ensure_dir(location)
+    zipfp = open(filename, 'rb')
+    try:
+        zip = zipfile.ZipFile(zipfp, allowZip64=True)
+        leading = has_leading_dir(zip.namelist()) and flatten
+        for info in zip.infolist():
+            name = info.filename
+            fn = name
+            if leading:
+                fn = split_leading_dir(name)[1]
+            fn = os.path.join(location, fn)
+            dir = os.path.dirname(fn)
+            if not is_within_directory(location, fn):
+                message = (
+                    'The zip file ({}) has a file ({}) trying to install '
+                    'outside target directory ({})'
+                )
+                raise InstallationError(message.format(filename, fn, location))
+            if fn.endswith('/') or fn.endswith('\\'):
+                # A directory
+                ensure_dir(fn)
+            else:
+                ensure_dir(dir)
+                # Don't use read() to avoid allocating an arbitrarily large
+                # chunk of memory for the file's content
+                fp = zip.open(name)
+                try:
+                    with open(fn, 'wb') as destfp:
+                        shutil.copyfileobj(fp, destfp)
+                finally:
+                    fp.close()
+                    if zip_item_is_executable(info):
+                        set_extracted_file_to_default_mode_plus_executable(fn)
+    finally:
+        zipfp.close()
+
+
+def untar_file(filename, location):
+    # type: (str, str) -> None
+    """
+    Untar the file (with path `filename`) to the destination `location`.
+    All files are written based on system defaults and umask (i.e. permissions
+    are not preserved), except that regular file members with any execute
+    permissions (user, group, or world) have "chmod +x" applied after being
+    written.  Note that for windows, any execute changes using os.chmod are
+    no-ops per the python docs.
+    """
+    ensure_dir(location)
+    if filename.lower().endswith('.gz') or filename.lower().endswith('.tgz'):
+        mode = 'r:gz'
+    elif filename.lower().endswith(BZ2_EXTENSIONS):
+        mode = 'r:bz2'
+    elif filename.lower().endswith(XZ_EXTENSIONS):
+        mode = 'r:xz'
+    elif filename.lower().endswith('.tar'):
+        mode = 'r'
+    else:
+        logger.warning(
+            'Cannot determine compression type for file %s', filename,
+        )
+        mode = 'r:*'
+    tar = tarfile.open(filename, mode)
+    try:
+        leading = has_leading_dir([
+            member.name for member in tar.getmembers()
+        ])
+        for member in tar.getmembers():
+            fn = member.name
+            if leading:
+                # https://github.com/python/mypy/issues/1174
+                fn = split_leading_dir(fn)[1]  # type: ignore
+            path = os.path.join(location, fn)
+            if not is_within_directory(location, path):
+                message = (
+                    'The tar file ({}) has a file ({}) trying to install '
+                    'outside target directory ({})'
+                )
+                raise InstallationError(
+                    message.format(filename, path, location)
+                )
+            if member.isdir():
+                ensure_dir(path)
+            elif member.issym():
+                try:
+                    # https://github.com/python/typeshed/issues/2673
+                    tar._extract_member(member, path)  # type: ignore
+                except Exception as exc:
+                    # Some corrupt tar files seem to produce this
+                    # (specifically bad symlinks)
+                    logger.warning(
+                        'In the tar file %s the member %s is invalid: %s',
+                        filename, member.name, exc,
+                    )
+                    continue
+            else:
+                try:
+                    fp = tar.extractfile(member)
+                except (KeyError, AttributeError) as exc:
+                    # Some corrupt tar files seem to produce this
+                    # (specifically bad symlinks)
+                    logger.warning(
+                        'In the tar file %s the member %s is invalid: %s',
+                        filename, member.name, exc,
+                    )
+                    continue
+                ensure_dir(os.path.dirname(path))
+                assert fp is not None
+                with open(path, 'wb') as destfp:
+                    shutil.copyfileobj(fp, destfp)
+                fp.close()
+                # Update the timestamp (useful for cython compiled files)
+                # https://github.com/python/typeshed/issues/2673
+                tar.utime(member, path)  # type: ignore
+                # member have any execute permissions for user/group/world?
+                if member.mode & 0o111:
+                    set_extracted_file_to_default_mode_plus_executable(path)
+    finally:
+        tar.close()
+
+
+def unpack_file(
+        filename,  # type: str
+        location,  # type: str
+        content_type=None,  # type: Optional[str]
+):
+    # type: (...) -> None
+    filename = os.path.realpath(filename)
+    if (
+        content_type == 'application/zip' or
+        filename.lower().endswith(ZIP_EXTENSIONS) or
+        zipfile.is_zipfile(filename)
+    ):
+        unzip_file(
+            filename,
+            location,
+            flatten=not filename.endswith('.whl')
+        )
+    elif (
+        content_type == 'application/x-gzip' or
+        tarfile.is_tarfile(filename) or
+        filename.lower().endswith(
+            TAR_EXTENSIONS + BZ2_EXTENSIONS + XZ_EXTENSIONS
+        )
+    ):
+        untar_file(filename, location)
+    else:
+        # FIXME: handle?
+        # FIXME: magic signatures?
+        logger.critical(
+            'Cannot unpack file %s (downloaded from %s, content-type: %s); '
+            'cannot detect archive format',
+            filename, location, content_type,
+        )
+        raise InstallationError(
+            'Cannot determine archive format of {}'.format(location)
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/urls.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/urls.py
new file mode 100644
index 0000000..f37bc8f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/urls.py
@@ -0,0 +1,55 @@
+import os
+import sys
+
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+from pip._vendor.six.moves.urllib import request as urllib_request
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Text, Union
+
+
+def get_url_scheme(url):
+    # type: (Union[str, Text]) -> Optional[Text]
+    if ':' not in url:
+        return None
+    return url.split(':', 1)[0].lower()
+
+
+def path_to_url(path):
+    # type: (Union[str, Text]) -> str
+    """
+    Convert a path to a file: URL.  The path will be made absolute and have
+    quoted path parts.
+    """
+    path = os.path.normpath(os.path.abspath(path))
+    url = urllib_parse.urljoin('file:', urllib_request.pathname2url(path))
+    return url
+
+
+def url_to_path(url):
+    # type: (str) -> str
+    """
+    Convert a file: URL to a path.
+    """
+    assert url.startswith('file:'), (
+        "You can only turn file: urls into filenames (not {url!r})"
+        .format(**locals()))
+
+    _, netloc, path, _, _ = urllib_parse.urlsplit(url)
+
+    if not netloc or netloc == 'localhost':
+        # According to RFC 8089, same as empty authority.
+        netloc = ''
+    elif sys.platform == 'win32':
+        # If we have a UNC path, prepend UNC share notation.
+        netloc = '\\\\' + netloc
+    else:
+        raise ValueError(
+            'non-local file URIs are not supported on this platform: {url!r}'
+            .format(**locals())
+        )
+
+    path = urllib_request.url2pathname(netloc + path)
+    return path
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/virtualenv.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/virtualenv.py
new file mode 100644
index 0000000..4a78128
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/virtualenv.py
@@ -0,0 +1,119 @@
+from __future__ import absolute_import
+
+import io
+import logging
+import os
+import re
+import site
+import sys
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional
+
+logger = logging.getLogger(__name__)
+_INCLUDE_SYSTEM_SITE_PACKAGES_REGEX = re.compile(
+    r"include-system-site-packages\s*=\s*(?P<value>true|false)"
+)
+
+
+def _running_under_venv():
+    # type: () -> bool
+    """Checks if sys.base_prefix and sys.prefix match.
+
+    This handles PEP 405 compliant virtual environments.
+    """
+    return sys.prefix != getattr(sys, "base_prefix", sys.prefix)
+
+
+def _running_under_regular_virtualenv():
+    # type: () -> bool
+    """Checks if sys.real_prefix is set.
+
+    This handles virtual environments created with pypa's virtualenv.
+    """
+    # pypa/virtualenv case
+    return hasattr(sys, 'real_prefix')
+
+
+def running_under_virtualenv():
+    # type: () -> bool
+    """Return True if we're running inside a virtualenv, False otherwise.
+    """
+    return _running_under_venv() or _running_under_regular_virtualenv()
+
+
+def _get_pyvenv_cfg_lines():
+    # type: () -> Optional[List[str]]
+    """Reads {sys.prefix}/pyvenv.cfg and returns its contents as list of lines
+
+    Returns None, if it could not read/access the file.
+    """
+    pyvenv_cfg_file = os.path.join(sys.prefix, 'pyvenv.cfg')
+    try:
+        # Although PEP 405 does not specify, the built-in venv module always
+        # writes with UTF-8. (pypa/pip#8717)
+        with io.open(pyvenv_cfg_file, encoding='utf-8') as f:
+            return f.read().splitlines()  # avoids trailing newlines
+    except IOError:
+        return None
+
+
+def _no_global_under_venv():
+    # type: () -> bool
+    """Check `{sys.prefix}/pyvenv.cfg` for system site-packages inclusion
+
+    PEP 405 specifies that when system site-packages are not supposed to be
+    visible from a virtual environment, `pyvenv.cfg` must contain the following
+    line:
+
+        include-system-site-packages = false
+
+    Additionally, log a warning if accessing the file fails.
+    """
+    cfg_lines = _get_pyvenv_cfg_lines()
+    if cfg_lines is None:
+        # We're not in a "sane" venv, so assume there is no system
+        # site-packages access (since that's PEP 405's default state).
+        logger.warning(
+            "Could not access 'pyvenv.cfg' despite a virtual environment "
+            "being active. Assuming global site-packages is not accessible "
+            "in this environment."
+        )
+        return True
+
+    for line in cfg_lines:
+        match = _INCLUDE_SYSTEM_SITE_PACKAGES_REGEX.match(line)
+        if match is not None and match.group('value') == 'false':
+            return True
+    return False
+
+
+def _no_global_under_regular_virtualenv():
+    # type: () -> bool
+    """Check if "no-global-site-packages.txt" exists beside site.py
+
+    This mirrors logic in pypa/virtualenv for determining whether system
+    site-packages are visible in the virtual environment.
+    """
+    site_mod_dir = os.path.dirname(os.path.abspath(site.__file__))
+    no_global_site_packages_file = os.path.join(
+        site_mod_dir, 'no-global-site-packages.txt',
+    )
+    return os.path.exists(no_global_site_packages_file)
+
+
+def virtualenv_no_global():
+    # type: () -> bool
+    """Returns a boolean, whether running in venv with no system site-packages.
+    """
+    # PEP 405 compliance needs to be checked first since virtualenv >=20 would
+    # return True for both checks, but is only able to use the PEP 405 config.
+    if _running_under_venv():
+        return _no_global_under_venv()
+
+    if _running_under_regular_virtualenv():
+        return _no_global_under_regular_virtualenv()
+
+    return False
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/wheel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/wheel.py
new file mode 100644
index 0000000..9ce371c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/utils/wheel.py
@@ -0,0 +1,225 @@
+"""Support functions for working with wheel files.
+"""
+
+from __future__ import absolute_import
+
+import logging
+from email.parser import Parser
+from zipfile import ZipFile
+
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.pkg_resources import DistInfoDistribution
+from pip._vendor.six import PY2, ensure_str
+
+from pip._internal.exceptions import UnsupportedWheel
+from pip._internal.utils.pkg_resources import DictMetadata
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from email.message import Message
+    from typing import Dict, Tuple
+
+    from pip._vendor.pkg_resources import Distribution
+
+if PY2:
+    from zipfile import BadZipfile as BadZipFile
+else:
+    from zipfile import BadZipFile
+
+
+VERSION_COMPATIBLE = (1, 0)
+
+
+logger = logging.getLogger(__name__)
+
+
+class WheelMetadata(DictMetadata):
+    """Metadata provider that maps metadata decoding exceptions to our
+    internal exception type.
+    """
+    def __init__(self, metadata, wheel_name):
+        # type: (Dict[str, bytes], str) -> None
+        super(WheelMetadata, self).__init__(metadata)
+        self._wheel_name = wheel_name
+
+    def get_metadata(self, name):
+        # type: (str) -> str
+        try:
+            return super(WheelMetadata, self).get_metadata(name)
+        except UnicodeDecodeError as e:
+            # Augment the default error with the origin of the file.
+            raise UnsupportedWheel(
+                "Error decoding metadata for {}: {}".format(
+                    self._wheel_name, e
+                )
+            )
+
+
+def pkg_resources_distribution_for_wheel(wheel_zip, name, location):
+    # type: (ZipFile, str, str) -> Distribution
+    """Get a pkg_resources distribution given a wheel.
+
+    :raises UnsupportedWheel: on any errors
+    """
+    info_dir, _ = parse_wheel(wheel_zip, name)
+
+    metadata_files = [
+        p for p in wheel_zip.namelist() if p.startswith("{}/".format(info_dir))
+    ]
+
+    metadata_text = {}  # type: Dict[str, bytes]
+    for path in metadata_files:
+        # If a flag is set, namelist entries may be unicode in Python 2.
+        # We coerce them to native str type to match the types used in the rest
+        # of the code. This cannot fail because unicode can always be encoded
+        # with UTF-8.
+        full_path = ensure_str(path)
+        _, metadata_name = full_path.split("/", 1)
+
+        try:
+            metadata_text[metadata_name] = read_wheel_metadata_file(
+                wheel_zip, full_path
+            )
+        except UnsupportedWheel as e:
+            raise UnsupportedWheel(
+                "{} has an invalid wheel, {}".format(name, str(e))
+            )
+
+    metadata = WheelMetadata(metadata_text, location)
+
+    return DistInfoDistribution(
+        location=location, metadata=metadata, project_name=name
+    )
+
+
+def parse_wheel(wheel_zip, name):
+    # type: (ZipFile, str) -> Tuple[str, Message]
+    """Extract information from the provided wheel, ensuring it meets basic
+    standards.
+
+    Returns the name of the .dist-info directory and the parsed WHEEL metadata.
+    """
+    try:
+        info_dir = wheel_dist_info_dir(wheel_zip, name)
+        metadata = wheel_metadata(wheel_zip, info_dir)
+        version = wheel_version(metadata)
+    except UnsupportedWheel as e:
+        raise UnsupportedWheel(
+            "{} has an invalid wheel, {}".format(name, str(e))
+        )
+
+    check_compatibility(version, name)
+
+    return info_dir, metadata
+
+
+def wheel_dist_info_dir(source, name):
+    # type: (ZipFile, str) -> str
+    """Returns the name of the contained .dist-info directory.
+
+    Raises AssertionError or UnsupportedWheel if not found, >1 found, or
+    it doesn't match the provided name.
+    """
+    # Zip file path separators must be /
+    subdirs = set(p.split("/", 1)[0] for p in source.namelist())
+
+    info_dirs = [s for s in subdirs if s.endswith('.dist-info')]
+
+    if not info_dirs:
+        raise UnsupportedWheel(".dist-info directory not found")
+
+    if len(info_dirs) > 1:
+        raise UnsupportedWheel(
+            "multiple .dist-info directories found: {}".format(
+                ", ".join(info_dirs)
+            )
+        )
+
+    info_dir = info_dirs[0]
+
+    info_dir_name = canonicalize_name(info_dir)
+    canonical_name = canonicalize_name(name)
+    if not info_dir_name.startswith(canonical_name):
+        raise UnsupportedWheel(
+            ".dist-info directory {!r} does not start with {!r}".format(
+                info_dir, canonical_name
+            )
+        )
+
+    # Zip file paths can be unicode or str depending on the zip entry flags,
+    # so normalize it.
+    return ensure_str(info_dir)
+
+
+def read_wheel_metadata_file(source, path):
+    # type: (ZipFile, str) -> bytes
+    try:
+        return source.read(path)
+        # BadZipFile for general corruption, KeyError for missing entry,
+        # and RuntimeError for password-protected files
+    except (BadZipFile, KeyError, RuntimeError) as e:
+        raise UnsupportedWheel(
+            "could not read {!r} file: {!r}".format(path, e)
+        )
+
+
+def wheel_metadata(source, dist_info_dir):
+    # type: (ZipFile, str) -> Message
+    """Return the WHEEL metadata of an extracted wheel, if possible.
+    Otherwise, raise UnsupportedWheel.
+    """
+    path = "{}/WHEEL".format(dist_info_dir)
+    # Zip file path separators must be /
+    wheel_contents = read_wheel_metadata_file(source, path)
+
+    try:
+        wheel_text = ensure_str(wheel_contents)
+    except UnicodeDecodeError as e:
+        raise UnsupportedWheel("error decoding {!r}: {!r}".format(path, e))
+
+    # FeedParser (used by Parser) does not raise any exceptions. The returned
+    # message may have .defects populated, but for backwards-compatibility we
+    # currently ignore them.
+    return Parser().parsestr(wheel_text)
+
+
+def wheel_version(wheel_data):
+    # type: (Message) -> Tuple[int, ...]
+    """Given WHEEL metadata, return the parsed Wheel-Version.
+    Otherwise, raise UnsupportedWheel.
+    """
+    version_text = wheel_data["Wheel-Version"]
+    if version_text is None:
+        raise UnsupportedWheel("WHEEL is missing Wheel-Version")
+
+    version = version_text.strip()
+
+    try:
+        return tuple(map(int, version.split('.')))
+    except ValueError:
+        raise UnsupportedWheel("invalid Wheel-Version: {!r}".format(version))
+
+
+def check_compatibility(version, name):
+    # type: (Tuple[int, ...], str) -> None
+    """Raises errors or warns if called with an incompatible Wheel-Version.
+
+    pip should refuse to install a Wheel-Version that's a major series
+    ahead of what it's compatible with (e.g 2.0 > 1.1); and warn when
+    installing a version only minor version ahead (e.g 1.2 > 1.1).
+
+    version: a 2-tuple representing a Wheel-Version (Major, Minor)
+    name: name of wheel or package to raise exception about
+
+    :raises UnsupportedWheel: when an incompatible Wheel-Version is given
+    """
+    if version[0] > VERSION_COMPATIBLE[0]:
+        raise UnsupportedWheel(
+            "{}'s Wheel-Version ({}) is not compatible with this version "
+            "of pip".format(name, '.'.join(map(str, version)))
+        )
+    elif version > VERSION_COMPATIBLE:
+        logger.warning(
+            'Installing from a newer Wheel-Version (%s)',
+            '.'.join(map(str, version)),
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/__init__.py
new file mode 100644
index 0000000..2a4eb13
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/__init__.py
@@ -0,0 +1,15 @@
+# Expose a limited set of classes and functions so callers outside of
+# the vcs package don't need to import deeper than `pip._internal.vcs`.
+# (The test directory and imports protected by MYPY_CHECK_RUNNING may
+# still need to import from a vcs sub-package.)
+# Import all vcs modules to register each VCS in the VcsSupport object.
+import pip._internal.vcs.bazaar
+import pip._internal.vcs.git
+import pip._internal.vcs.mercurial
+import pip._internal.vcs.subversion  # noqa: F401
+from pip._internal.vcs.versioncontrol import (  # noqa: F401
+    RemoteNotFoundError,
+    is_url,
+    make_vcs_requirement_url,
+    vcs,
+)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/bazaar.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/bazaar.py
new file mode 100644
index 0000000..94408c5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/bazaar.py
@@ -0,0 +1,119 @@
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import logging
+import os
+
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.utils.misc import display_path, rmtree
+from pip._internal.utils.subprocess import make_command
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.urls import path_to_url
+from pip._internal.vcs.versioncontrol import VersionControl, vcs
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Tuple
+    from pip._internal.utils.misc import HiddenText
+    from pip._internal.vcs.versioncontrol import AuthInfo, RevOptions
+
+
+logger = logging.getLogger(__name__)
+
+
+class Bazaar(VersionControl):
+    name = 'bzr'
+    dirname = '.bzr'
+    repo_name = 'branch'
+    schemes = (
+        'bzr', 'bzr+http', 'bzr+https', 'bzr+ssh', 'bzr+sftp', 'bzr+ftp',
+        'bzr+lp',
+    )
+
+    def __init__(self, *args, **kwargs):
+        super(Bazaar, self).__init__(*args, **kwargs)
+        # This is only needed for python <2.7.5
+        # Register lp but do not expose as a scheme to support bzr+lp.
+        if getattr(urllib_parse, 'uses_fragment', None):
+            urllib_parse.uses_fragment.extend(['lp'])
+
+    @staticmethod
+    def get_base_rev_args(rev):
+        return ['-r', rev]
+
+    def export(self, location, url):
+        # type: (str, HiddenText) -> None
+        """
+        Export the Bazaar repository at the url to the destination location
+        """
+        # Remove the location to make sure Bazaar can export it correctly
+        if os.path.exists(location):
+            rmtree(location)
+
+        url, rev_options = self.get_url_rev_options(url)
+        self.run_command(
+            make_command('export', location, url, rev_options.to_args())
+        )
+
+    def fetch_new(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        rev_display = rev_options.to_display()
+        logger.info(
+            'Checking out %s%s to %s',
+            url,
+            rev_display,
+            display_path(dest),
+        )
+        cmd_args = (
+            make_command('branch', '-q', rev_options.to_args(), url, dest)
+        )
+        self.run_command(cmd_args)
+
+    def switch(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        self.run_command(make_command('switch', url), cwd=dest)
+
+    def update(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        cmd_args = make_command('pull', '-q', rev_options.to_args())
+        self.run_command(cmd_args, cwd=dest)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url):
+        # type: (str) -> Tuple[str, Optional[str], AuthInfo]
+        # hotfix the URL scheme after removing bzr+ from bzr+ssh:// readd it
+        url, rev, user_pass = super(Bazaar, cls).get_url_rev_and_auth(url)
+        if url.startswith('ssh://'):
+            url = 'bzr+' + url
+        return url, rev, user_pass
+
+    @classmethod
+    def get_remote_url(cls, location):
+        urls = cls.run_command(['info'], cwd=location)
+        for line in urls.splitlines():
+            line = line.strip()
+            for x in ('checkout of branch: ',
+                      'parent branch: '):
+                if line.startswith(x):
+                    repo = line.split(x)[1]
+                    if cls._is_local_repository(repo):
+                        return path_to_url(repo)
+                    return repo
+        return None
+
+    @classmethod
+    def get_revision(cls, location):
+        revision = cls.run_command(
+            ['revno'], cwd=location,
+        )
+        return revision.splitlines()[-1]
+
+    @classmethod
+    def is_commit_id_equal(cls, dest, name):
+        """Always assume the versions don't match"""
+        return False
+
+
+vcs.register(Bazaar)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/git.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/git.py
new file mode 100644
index 0000000..a9c7fb6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/git.py
@@ -0,0 +1,397 @@
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import logging
+import os.path
+import re
+
+from pip._vendor.packaging.version import parse as parse_version
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+from pip._vendor.six.moves.urllib import request as urllib_request
+
+from pip._internal.exceptions import BadCommand, SubProcessError
+from pip._internal.utils.misc import display_path, hide_url
+from pip._internal.utils.subprocess import make_command
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.vcs.versioncontrol import (
+    RemoteNotFoundError,
+    VersionControl,
+    find_path_to_setup_from_repo_root,
+    vcs,
+)
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Tuple
+    from pip._internal.utils.misc import HiddenText
+    from pip._internal.vcs.versioncontrol import AuthInfo, RevOptions
+
+
+urlsplit = urllib_parse.urlsplit
+urlunsplit = urllib_parse.urlunsplit
+
+
+logger = logging.getLogger(__name__)
+
+
+HASH_REGEX = re.compile('^[a-fA-F0-9]{40}$')
+
+
+def looks_like_hash(sha):
+    return bool(HASH_REGEX.match(sha))
+
+
+class Git(VersionControl):
+    name = 'git'
+    dirname = '.git'
+    repo_name = 'clone'
+    schemes = (
+        'git', 'git+http', 'git+https', 'git+ssh', 'git+git', 'git+file',
+    )
+    # Prevent the user's environment variables from interfering with pip:
+    # https://github.com/pypa/pip/issues/1130
+    unset_environ = ('GIT_DIR', 'GIT_WORK_TREE')
+    default_arg_rev = 'HEAD'
+
+    @staticmethod
+    def get_base_rev_args(rev):
+        return [rev]
+
+    def is_immutable_rev_checkout(self, url, dest):
+        # type: (str, str) -> bool
+        _, rev_options = self.get_url_rev_options(hide_url(url))
+        if not rev_options.rev:
+            return False
+        if not self.is_commit_id_equal(dest, rev_options.rev):
+            # the current commit is different from rev,
+            # which means rev was something else than a commit hash
+            return False
+        # return False in the rare case rev is both a commit hash
+        # and a tag or a branch; we don't want to cache in that case
+        # because that branch/tag could point to something else in the future
+        is_tag_or_branch = bool(
+            self.get_revision_sha(dest, rev_options.rev)[0]
+        )
+        return not is_tag_or_branch
+
+    def get_git_version(self):
+        VERSION_PFX = 'git version '
+        version = self.run_command(['version'])
+        if version.startswith(VERSION_PFX):
+            version = version[len(VERSION_PFX):].split()[0]
+        else:
+            version = ''
+        # get first 3 positions of the git version because
+        # on windows it is x.y.z.windows.t, and this parses as
+        # LegacyVersion which always smaller than a Version.
+        version = '.'.join(version.split('.')[:3])
+        return parse_version(version)
+
+    @classmethod
+    def get_current_branch(cls, location):
+        """
+        Return the current branch, or None if HEAD isn't at a branch
+        (e.g. detached HEAD).
+        """
+        # git-symbolic-ref exits with empty stdout if "HEAD" is a detached
+        # HEAD rather than a symbolic ref.  In addition, the -q causes the
+        # command to exit with status code 1 instead of 128 in this case
+        # and to suppress the message to stderr.
+        args = ['symbolic-ref', '-q', 'HEAD']
+        output = cls.run_command(
+            args, extra_ok_returncodes=(1, ), cwd=location,
+        )
+        ref = output.strip()
+
+        if ref.startswith('refs/heads/'):
+            return ref[len('refs/heads/'):]
+
+        return None
+
+    def export(self, location, url):
+        # type: (str, HiddenText) -> None
+        """Export the Git repository at the url to the destination location"""
+        if not location.endswith('/'):
+            location = location + '/'
+
+        with TempDirectory(kind="export") as temp_dir:
+            self.unpack(temp_dir.path, url=url)
+            self.run_command(
+                ['checkout-index', '-a', '-f', '--prefix', location],
+                cwd=temp_dir.path
+            )
+
+    @classmethod
+    def get_revision_sha(cls, dest, rev):
+        """
+        Return (sha_or_none, is_branch), where sha_or_none is a commit hash
+        if the revision names a remote branch or tag, otherwise None.
+
+        Args:
+          dest: the repository directory.
+          rev: the revision name.
+        """
+        # Pass rev to pre-filter the list.
+
+        output = ''
+        try:
+            output = cls.run_command(['show-ref', rev], cwd=dest)
+        except SubProcessError:
+            pass
+
+        refs = {}
+        for line in output.strip().splitlines():
+            try:
+                sha, ref = line.split()
+            except ValueError:
+                # Include the offending line to simplify troubleshooting if
+                # this error ever occurs.
+                raise ValueError('unexpected show-ref line: {!r}'.format(line))
+
+            refs[ref] = sha
+
+        branch_ref = 'refs/remotes/origin/{}'.format(rev)
+        tag_ref = 'refs/tags/{}'.format(rev)
+
+        sha = refs.get(branch_ref)
+        if sha is not None:
+            return (sha, True)
+
+        sha = refs.get(tag_ref)
+
+        return (sha, False)
+
+    @classmethod
+    def resolve_revision(cls, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> RevOptions
+        """
+        Resolve a revision to a new RevOptions object with the SHA1 of the
+        branch, tag, or ref if found.
+
+        Args:
+          rev_options: a RevOptions object.
+        """
+        rev = rev_options.arg_rev
+        # The arg_rev property's implementation for Git ensures that the
+        # rev return value is always non-None.
+        assert rev is not None
+
+        sha, is_branch = cls.get_revision_sha(dest, rev)
+
+        if sha is not None:
+            rev_options = rev_options.make_new(sha)
+            rev_options.branch_name = rev if is_branch else None
+
+            return rev_options
+
+        # Do not show a warning for the common case of something that has
+        # the form of a Git commit hash.
+        if not looks_like_hash(rev):
+            logger.warning(
+                "Did not find branch or tag '%s', assuming revision or ref.",
+                rev,
+            )
+
+        if not rev.startswith('refs/'):
+            return rev_options
+
+        # If it looks like a ref, we have to fetch it explicitly.
+        cls.run_command(
+            make_command('fetch', '-q', url, rev_options.to_args()),
+            cwd=dest,
+        )
+        # Change the revision to the SHA of the ref we fetched
+        sha = cls.get_revision(dest, rev='FETCH_HEAD')
+        rev_options = rev_options.make_new(sha)
+
+        return rev_options
+
+    @classmethod
+    def is_commit_id_equal(cls, dest, name):
+        """
+        Return whether the current commit hash equals the given name.
+
+        Args:
+          dest: the repository directory.
+          name: a string name.
+        """
+        if not name:
+            # Then avoid an unnecessary subprocess call.
+            return False
+
+        return cls.get_revision(dest) == name
+
+    def fetch_new(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        rev_display = rev_options.to_display()
+        logger.info('Cloning %s%s to %s', url, rev_display, display_path(dest))
+        self.run_command(make_command('clone', '-q', url, dest))
+
+        if rev_options.rev:
+            # Then a specific revision was requested.
+            rev_options = self.resolve_revision(dest, url, rev_options)
+            branch_name = getattr(rev_options, 'branch_name', None)
+            if branch_name is None:
+                # Only do a checkout if the current commit id doesn't match
+                # the requested revision.
+                if not self.is_commit_id_equal(dest, rev_options.rev):
+                    cmd_args = make_command(
+                        'checkout', '-q', rev_options.to_args(),
+                    )
+                    self.run_command(cmd_args, cwd=dest)
+            elif self.get_current_branch(dest) != branch_name:
+                # Then a specific branch was requested, and that branch
+                # is not yet checked out.
+                track_branch = 'origin/{}'.format(branch_name)
+                cmd_args = [
+                    'checkout', '-b', branch_name, '--track', track_branch,
+                ]
+                self.run_command(cmd_args, cwd=dest)
+
+        #: repo may contain submodules
+        self.update_submodules(dest)
+
+    def switch(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        self.run_command(
+            make_command('config', 'remote.origin.url', url),
+            cwd=dest,
+        )
+        cmd_args = make_command('checkout', '-q', rev_options.to_args())
+        self.run_command(cmd_args, cwd=dest)
+
+        self.update_submodules(dest)
+
+    def update(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        # First fetch changes from the default remote
+        if self.get_git_version() >= parse_version('1.9.0'):
+            # fetch tags in addition to everything else
+            self.run_command(['fetch', '-q', '--tags'], cwd=dest)
+        else:
+            self.run_command(['fetch', '-q'], cwd=dest)
+        # Then reset to wanted revision (maybe even origin/master)
+        rev_options = self.resolve_revision(dest, url, rev_options)
+        cmd_args = make_command('reset', '--hard', '-q', rev_options.to_args())
+        self.run_command(cmd_args, cwd=dest)
+        #: update submodules
+        self.update_submodules(dest)
+
+    @classmethod
+    def get_remote_url(cls, location):
+        """
+        Return URL of the first remote encountered.
+
+        Raises RemoteNotFoundError if the repository does not have a remote
+        url configured.
+        """
+        # We need to pass 1 for extra_ok_returncodes since the command
+        # exits with return code 1 if there are no matching lines.
+        stdout = cls.run_command(
+            ['config', '--get-regexp', r'remote\..*\.url'],
+            extra_ok_returncodes=(1, ), cwd=location,
+        )
+        remotes = stdout.splitlines()
+        try:
+            found_remote = remotes[0]
+        except IndexError:
+            raise RemoteNotFoundError
+
+        for remote in remotes:
+            if remote.startswith('remote.origin.url '):
+                found_remote = remote
+                break
+        url = found_remote.split(' ')[1]
+        return url.strip()
+
+    @classmethod
+    def get_revision(cls, location, rev=None):
+        if rev is None:
+            rev = 'HEAD'
+        current_rev = cls.run_command(
+            ['rev-parse', rev], cwd=location,
+        )
+        return current_rev.strip()
+
+    @classmethod
+    def get_subdirectory(cls, location):
+        """
+        Return the path to setup.py, relative to the repo root.
+        Return None if setup.py is in the repo root.
+        """
+        # find the repo root
+        git_dir = cls.run_command(
+            ['rev-parse', '--git-dir'],
+            cwd=location).strip()
+        if not os.path.isabs(git_dir):
+            git_dir = os.path.join(location, git_dir)
+        repo_root = os.path.abspath(os.path.join(git_dir, '..'))
+        return find_path_to_setup_from_repo_root(location, repo_root)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url):
+        # type: (str) -> Tuple[str, Optional[str], AuthInfo]
+        """
+        Prefixes stub URLs like 'user@hostname:user/repo.git' with 'ssh://'.
+        That's required because although they use SSH they sometimes don't
+        work with a ssh:// scheme (e.g. GitHub). But we need a scheme for
+        parsing. Hence we remove it again afterwards and return it as a stub.
+        """
+        # Works around an apparent Git bug
+        # (see https://article.gmane.org/gmane.comp.version-control.git/146500)
+        scheme, netloc, path, query, fragment = urlsplit(url)
+        if scheme.endswith('file'):
+            initial_slashes = path[:-len(path.lstrip('/'))]
+            newpath = (
+                initial_slashes +
+                urllib_request.url2pathname(path)
+                .replace('\\', '/').lstrip('/')
+            )
+            url = urlunsplit((scheme, netloc, newpath, query, fragment))
+            after_plus = scheme.find('+') + 1
+            url = scheme[:after_plus] + urlunsplit(
+                (scheme[after_plus:], netloc, newpath, query, fragment),
+            )
+
+        if '://' not in url:
+            assert 'file:' not in url
+            url = url.replace('git+', 'git+ssh://')
+            url, rev, user_pass = super(Git, cls).get_url_rev_and_auth(url)
+            url = url.replace('ssh://', '')
+        else:
+            url, rev, user_pass = super(Git, cls).get_url_rev_and_auth(url)
+
+        return url, rev, user_pass
+
+    @classmethod
+    def update_submodules(cls, location):
+        if not os.path.exists(os.path.join(location, '.gitmodules')):
+            return
+        cls.run_command(
+            ['submodule', 'update', '--init', '--recursive', '-q'],
+            cwd=location,
+        )
+
+    @classmethod
+    def get_repository_root(cls, location):
+        loc = super(Git, cls).get_repository_root(location)
+        if loc:
+            return loc
+        try:
+            r = cls.run_command(
+                ['rev-parse', '--show-toplevel'],
+                cwd=location,
+                log_failed_cmd=False,
+            )
+        except BadCommand:
+            logger.debug("could not determine if %s is under git control "
+                         "because git is not available", location)
+            return None
+        except SubProcessError:
+            return None
+        return os.path.normpath(r.rstrip('\r\n'))
+
+
+vcs.register(Git)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/mercurial.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/mercurial.py
new file mode 100644
index 0000000..69763fe
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/mercurial.py
@@ -0,0 +1,158 @@
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import logging
+import os
+
+from pip._vendor.six.moves import configparser
+
+from pip._internal.exceptions import BadCommand, SubProcessError
+from pip._internal.utils.misc import display_path
+from pip._internal.utils.subprocess import make_command
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.urls import path_to_url
+from pip._internal.vcs.versioncontrol import (
+    VersionControl,
+    find_path_to_setup_from_repo_root,
+    vcs,
+)
+
+if MYPY_CHECK_RUNNING:
+    from pip._internal.utils.misc import HiddenText
+    from pip._internal.vcs.versioncontrol import RevOptions
+
+
+logger = logging.getLogger(__name__)
+
+
+class Mercurial(VersionControl):
+    name = 'hg'
+    dirname = '.hg'
+    repo_name = 'clone'
+    schemes = (
+        'hg', 'hg+file', 'hg+http', 'hg+https', 'hg+ssh', 'hg+static-http',
+    )
+
+    @staticmethod
+    def get_base_rev_args(rev):
+        return [rev]
+
+    def export(self, location, url):
+        # type: (str, HiddenText) -> None
+        """Export the Hg repository at the url to the destination location"""
+        with TempDirectory(kind="export") as temp_dir:
+            self.unpack(temp_dir.path, url=url)
+
+            self.run_command(
+                ['archive', location], cwd=temp_dir.path
+            )
+
+    def fetch_new(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        rev_display = rev_options.to_display()
+        logger.info(
+            'Cloning hg %s%s to %s',
+            url,
+            rev_display,
+            display_path(dest),
+        )
+        self.run_command(make_command('clone', '--noupdate', '-q', url, dest))
+        self.run_command(
+            make_command('update', '-q', rev_options.to_args()),
+            cwd=dest,
+        )
+
+    def switch(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        repo_config = os.path.join(dest, self.dirname, 'hgrc')
+        config = configparser.RawConfigParser()
+        try:
+            config.read(repo_config)
+            config.set('paths', 'default', url.secret)
+            with open(repo_config, 'w') as config_file:
+                config.write(config_file)
+        except (OSError, configparser.NoSectionError) as exc:
+            logger.warning(
+                'Could not switch Mercurial repository to %s: %s', url, exc,
+            )
+        else:
+            cmd_args = make_command('update', '-q', rev_options.to_args())
+            self.run_command(cmd_args, cwd=dest)
+
+    def update(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        self.run_command(['pull', '-q'], cwd=dest)
+        cmd_args = make_command('update', '-q', rev_options.to_args())
+        self.run_command(cmd_args, cwd=dest)
+
+    @classmethod
+    def get_remote_url(cls, location):
+        url = cls.run_command(
+            ['showconfig', 'paths.default'],
+            cwd=location).strip()
+        if cls._is_local_repository(url):
+            url = path_to_url(url)
+        return url.strip()
+
+    @classmethod
+    def get_revision(cls, location):
+        """
+        Return the repository-local changeset revision number, as an integer.
+        """
+        current_revision = cls.run_command(
+            ['parents', '--template={rev}'], cwd=location).strip()
+        return current_revision
+
+    @classmethod
+    def get_requirement_revision(cls, location):
+        """
+        Return the changeset identification hash, as a 40-character
+        hexadecimal string
+        """
+        current_rev_hash = cls.run_command(
+            ['parents', '--template={node}'],
+            cwd=location).strip()
+        return current_rev_hash
+
+    @classmethod
+    def is_commit_id_equal(cls, dest, name):
+        """Always assume the versions don't match"""
+        return False
+
+    @classmethod
+    def get_subdirectory(cls, location):
+        """
+        Return the path to setup.py, relative to the repo root.
+        Return None if setup.py is in the repo root.
+        """
+        # find the repo root
+        repo_root = cls.run_command(
+            ['root'], cwd=location).strip()
+        if not os.path.isabs(repo_root):
+            repo_root = os.path.abspath(os.path.join(location, repo_root))
+        return find_path_to_setup_from_repo_root(location, repo_root)
+
+    @classmethod
+    def get_repository_root(cls, location):
+        loc = super(Mercurial, cls).get_repository_root(location)
+        if loc:
+            return loc
+        try:
+            r = cls.run_command(
+                ['root'],
+                cwd=location,
+                log_failed_cmd=False,
+            )
+        except BadCommand:
+            logger.debug("could not determine if %s is under hg control "
+                         "because hg is not available", location)
+            return None
+        except SubProcessError:
+            return None
+        return os.path.normpath(r.rstrip('\r\n'))
+
+
+vcs.register(Mercurial)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/subversion.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/subversion.py
new file mode 100644
index 0000000..ab13497
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/subversion.py
@@ -0,0 +1,336 @@
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import logging
+import os
+import re
+
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import (
+    display_path,
+    is_console_interactive,
+    rmtree,
+    split_auth_from_netloc,
+)
+from pip._internal.utils.subprocess import make_command
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.vcs.versioncontrol import VersionControl, vcs
+
+_svn_xml_url_re = re.compile('url="([^"]+)"')
+_svn_rev_re = re.compile(r'committed-rev="(\d+)"')
+_svn_info_xml_rev_re = re.compile(r'\s*revision="(\d+)"')
+_svn_info_xml_url_re = re.compile(r'<url>(.*)</url>')
+
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Tuple
+    from pip._internal.utils.subprocess import CommandArgs
+    from pip._internal.utils.misc import HiddenText
+    from pip._internal.vcs.versioncontrol import AuthInfo, RevOptions
+
+
+logger = logging.getLogger(__name__)
+
+
+class Subversion(VersionControl):
+    name = 'svn'
+    dirname = '.svn'
+    repo_name = 'checkout'
+    schemes = ('svn', 'svn+ssh', 'svn+http', 'svn+https', 'svn+svn')
+
+    @classmethod
+    def should_add_vcs_url_prefix(cls, remote_url):
+        return True
+
+    @staticmethod
+    def get_base_rev_args(rev):
+        return ['-r', rev]
+
+    @classmethod
+    def get_revision(cls, location):
+        """
+        Return the maximum revision for all files under a given location
+        """
+        # Note: taken from setuptools.command.egg_info
+        revision = 0
+
+        for base, dirs, _ in os.walk(location):
+            if cls.dirname not in dirs:
+                dirs[:] = []
+                continue    # no sense walking uncontrolled subdirs
+            dirs.remove(cls.dirname)
+            entries_fn = os.path.join(base, cls.dirname, 'entries')
+            if not os.path.exists(entries_fn):
+                # FIXME: should we warn?
+                continue
+
+            dirurl, localrev = cls._get_svn_url_rev(base)
+
+            if base == location:
+                base = dirurl + '/'   # save the root url
+            elif not dirurl or not dirurl.startswith(base):
+                dirs[:] = []
+                continue    # not part of the same svn tree, skip it
+            revision = max(revision, localrev)
+        return revision
+
+    @classmethod
+    def get_netloc_and_auth(cls, netloc, scheme):
+        """
+        This override allows the auth information to be passed to svn via the
+        --username and --password options instead of via the URL.
+        """
+        if scheme == 'ssh':
+            # The --username and --password options can't be used for
+            # svn+ssh URLs, so keep the auth information in the URL.
+            return super(Subversion, cls).get_netloc_and_auth(netloc, scheme)
+
+        return split_auth_from_netloc(netloc)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url):
+        # type: (str) -> Tuple[str, Optional[str], AuthInfo]
+        # hotfix the URL scheme after removing svn+ from svn+ssh:// readd it
+        url, rev, user_pass = super(Subversion, cls).get_url_rev_and_auth(url)
+        if url.startswith('ssh://'):
+            url = 'svn+' + url
+        return url, rev, user_pass
+
+    @staticmethod
+    def make_rev_args(username, password):
+        # type: (Optional[str], Optional[HiddenText]) -> CommandArgs
+        extra_args = []  # type: CommandArgs
+        if username:
+            extra_args += ['--username', username]
+        if password:
+            extra_args += ['--password', password]
+
+        return extra_args
+
+    @classmethod
+    def get_remote_url(cls, location):
+        # In cases where the source is in a subdirectory, not alongside
+        # setup.py we have to look up in the location until we find a real
+        # setup.py
+        orig_location = location
+        while not os.path.exists(os.path.join(location, 'setup.py')):
+            last_location = location
+            location = os.path.dirname(location)
+            if location == last_location:
+                # We've traversed up to the root of the filesystem without
+                # finding setup.py
+                logger.warning(
+                    "Could not find setup.py for directory %s (tried all "
+                    "parent directories)",
+                    orig_location,
+                )
+                return None
+
+        return cls._get_svn_url_rev(location)[0]
+
+    @classmethod
+    def _get_svn_url_rev(cls, location):
+        from pip._internal.exceptions import SubProcessError
+
+        entries_path = os.path.join(location, cls.dirname, 'entries')
+        if os.path.exists(entries_path):
+            with open(entries_path) as f:
+                data = f.read()
+        else:  # subversion >= 1.7 does not have the 'entries' file
+            data = ''
+
+        if (data.startswith('8') or
+                data.startswith('9') or
+                data.startswith('10')):
+            data = list(map(str.splitlines, data.split('\n\x0c\n')))
+            del data[0][0]  # get rid of the '8'
+            url = data[0][3]
+            revs = [int(d[9]) for d in data if len(d) > 9 and d[9]] + [0]
+        elif data.startswith('<?xml'):
+            match = _svn_xml_url_re.search(data)
+            if not match:
+                raise ValueError(
+                    'Badly formatted data: {data!r}'.format(**locals()))
+            url = match.group(1)    # get repository URL
+            revs = [int(m.group(1)) for m in _svn_rev_re.finditer(data)] + [0]
+        else:
+            try:
+                # subversion >= 1.7
+                # Note that using get_remote_call_options is not necessary here
+                # because `svn info` is being run against a local directory.
+                # We don't need to worry about making sure interactive mode
+                # is being used to prompt for passwords, because passwords
+                # are only potentially needed for remote server requests.
+                xml = cls.run_command(
+                    ['info', '--xml', location],
+                )
+                url = _svn_info_xml_url_re.search(xml).group(1)
+                revs = [
+                    int(m.group(1)) for m in _svn_info_xml_rev_re.finditer(xml)
+                ]
+            except SubProcessError:
+                url, revs = None, []
+
+        if revs:
+            rev = max(revs)
+        else:
+            rev = 0
+
+        return url, rev
+
+    @classmethod
+    def is_commit_id_equal(cls, dest, name):
+        """Always assume the versions don't match"""
+        return False
+
+    def __init__(self, use_interactive=None):
+        # type: (bool) -> None
+        if use_interactive is None:
+            use_interactive = is_console_interactive()
+        self.use_interactive = use_interactive
+
+        # This member is used to cache the fetched version of the current
+        # ``svn`` client.
+        # Special value definitions:
+        #   None: Not evaluated yet.
+        #   Empty tuple: Could not parse version.
+        self._vcs_version = None  # type: Optional[Tuple[int, ...]]
+
+        super(Subversion, self).__init__()
+
+    def call_vcs_version(self):
+        # type: () -> Tuple[int, ...]
+        """Query the version of the currently installed Subversion client.
+
+        :return: A tuple containing the parts of the version information or
+            ``()`` if the version returned from ``svn`` could not be parsed.
+        :raises: BadCommand: If ``svn`` is not installed.
+        """
+        # Example versions:
+        #   svn, version 1.10.3 (r1842928)
+        #      compiled Feb 25 2019, 14:20:39 on x86_64-apple-darwin17.0.0
+        #   svn, version 1.7.14 (r1542130)
+        #      compiled Mar 28 2018, 08:49:13 on x86_64-pc-linux-gnu
+        #   svn, version 1.12.0-SlikSvn (SlikSvn/1.12.0)
+        #      compiled May 28 2019, 13:44:56 on x86_64-microsoft-windows6.2
+        version_prefix = 'svn, version '
+        version = self.run_command(['--version'])
+
+        if not version.startswith(version_prefix):
+            return ()
+
+        version = version[len(version_prefix):].split()[0]
+        version_list = version.partition('-')[0].split('.')
+        try:
+            parsed_version = tuple(map(int, version_list))
+        except ValueError:
+            return ()
+
+        return parsed_version
+
+    def get_vcs_version(self):
+        # type: () -> Tuple[int, ...]
+        """Return the version of the currently installed Subversion client.
+
+        If the version of the Subversion client has already been queried,
+        a cached value will be used.
+
+        :return: A tuple containing the parts of the version information or
+            ``()`` if the version returned from ``svn`` could not be parsed.
+        :raises: BadCommand: If ``svn`` is not installed.
+        """
+        if self._vcs_version is not None:
+            # Use cached version, if available.
+            # If parsing the version failed previously (empty tuple),
+            # do not attempt to parse it again.
+            return self._vcs_version
+
+        vcs_version = self.call_vcs_version()
+        self._vcs_version = vcs_version
+        return vcs_version
+
+    def get_remote_call_options(self):
+        # type: () -> CommandArgs
+        """Return options to be used on calls to Subversion that contact the server.
+
+        These options are applicable for the following ``svn`` subcommands used
+        in this class.
+
+            - checkout
+            - export
+            - switch
+            - update
+
+        :return: A list of command line arguments to pass to ``svn``.
+        """
+        if not self.use_interactive:
+            # --non-interactive switch is available since Subversion 0.14.4.
+            # Subversion < 1.8 runs in interactive mode by default.
+            return ['--non-interactive']
+
+        svn_version = self.get_vcs_version()
+        # By default, Subversion >= 1.8 runs in non-interactive mode if
+        # stdin is not a TTY. Since that is how pip invokes SVN, in
+        # call_subprocess(), pip must pass --force-interactive to ensure
+        # the user can be prompted for a password, if required.
+        #   SVN added the --force-interactive option in SVN 1.8. Since
+        # e.g. RHEL/CentOS 7, which is supported until 2024, ships with
+        # SVN 1.7, pip should continue to support SVN 1.7. Therefore, pip
+        # can't safely add the option if the SVN version is < 1.8 (or unknown).
+        if svn_version >= (1, 8):
+            return ['--force-interactive']
+
+        return []
+
+    def export(self, location, url):
+        # type: (str, HiddenText) -> None
+        """Export the svn repository at the url to the destination location"""
+        url, rev_options = self.get_url_rev_options(url)
+
+        logger.info('Exporting svn repository %s to %s', url, location)
+        with indent_log():
+            if os.path.exists(location):
+                # Subversion doesn't like to check out over an existing
+                # directory --force fixes this, but was only added in svn 1.5
+                rmtree(location)
+            cmd_args = make_command(
+                'export', self.get_remote_call_options(),
+                rev_options.to_args(), url, location,
+            )
+            self.run_command(cmd_args)
+
+    def fetch_new(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        rev_display = rev_options.to_display()
+        logger.info(
+            'Checking out %s%s to %s',
+            url,
+            rev_display,
+            display_path(dest),
+        )
+        cmd_args = make_command(
+            'checkout', '-q', self.get_remote_call_options(),
+            rev_options.to_args(), url, dest,
+        )
+        self.run_command(cmd_args)
+
+    def switch(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        cmd_args = make_command(
+            'switch', self.get_remote_call_options(), rev_options.to_args(),
+            url, dest,
+        )
+        self.run_command(cmd_args)
+
+    def update(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        cmd_args = make_command(
+            'update', self.get_remote_call_options(), rev_options.to_args(),
+            dest,
+        )
+        self.run_command(cmd_args)
+
+
+vcs.register(Subversion)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/versioncontrol.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/versioncontrol.py
new file mode 100644
index 0000000..96f830f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/vcs/versioncontrol.py
@@ -0,0 +1,811 @@
+"""Handles all VCS (version control) support"""
+
+from __future__ import absolute_import
+
+import errno
+import logging
+import os
+import shutil
+import subprocess
+import sys
+
+from pip._vendor import pkg_resources
+from pip._vendor.six.moves.urllib import parse as urllib_parse
+
+from pip._internal.exceptions import (
+    BadCommand,
+    InstallationError,
+    SubProcessError,
+)
+from pip._internal.utils.compat import console_to_str, samefile
+from pip._internal.utils.logging import subprocess_logger
+from pip._internal.utils.misc import (
+    ask_path_exists,
+    backup_dir,
+    display_path,
+    hide_url,
+    hide_value,
+    rmtree,
+)
+from pip._internal.utils.subprocess import (
+    format_command_args,
+    make_command,
+    make_subprocess_output_error,
+    reveal_command_args,
+)
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.urls import get_url_scheme
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Dict, Iterable, Iterator, List, Optional, Text, Tuple,
+        Type, Union, Mapping, Any
+    )
+    from pip._internal.utils.misc import HiddenText
+    from pip._internal.utils.subprocess import CommandArgs
+
+    AuthInfo = Tuple[Optional[str], Optional[str]]
+
+
+__all__ = ['vcs']
+
+
+logger = logging.getLogger(__name__)
+
+
+def is_url(name):
+    # type: (Union[str, Text]) -> bool
+    """
+    Return true if the name looks like a URL.
+    """
+    scheme = get_url_scheme(name)
+    if scheme is None:
+        return False
+    return scheme in ['http', 'https', 'file', 'ftp'] + vcs.all_schemes
+
+
+def make_vcs_requirement_url(repo_url, rev, project_name, subdir=None):
+    # type: (str, str, str, Optional[str]) -> str
+    """
+    Return the URL for a VCS requirement.
+
+    Args:
+      repo_url: the remote VCS url, with any needed VCS prefix (e.g. "git+").
+      project_name: the (unescaped) project name.
+    """
+    egg_project_name = pkg_resources.to_filename(project_name)
+    req = '{}@{}#egg={}'.format(repo_url, rev, egg_project_name)
+    if subdir:
+        req += '&subdirectory={}'.format(subdir)
+
+    return req
+
+
+def call_subprocess(
+    cmd,  # type: Union[List[str], CommandArgs]
+    cwd=None,  # type: Optional[str]
+    extra_environ=None,  # type: Optional[Mapping[str, Any]]
+    extra_ok_returncodes=None,  # type: Optional[Iterable[int]]
+    log_failed_cmd=True  # type: Optional[bool]
+):
+    # type: (...) -> Text
+    """
+    Args:
+      extra_ok_returncodes: an iterable of integer return codes that are
+        acceptable, in addition to 0. Defaults to None, which means [].
+      log_failed_cmd: if false, failed commands are not logged,
+        only raised.
+    """
+    if extra_ok_returncodes is None:
+        extra_ok_returncodes = []
+
+    # log the subprocess output at DEBUG level.
+    log_subprocess = subprocess_logger.debug
+
+    env = os.environ.copy()
+    if extra_environ:
+        env.update(extra_environ)
+
+    # Whether the subprocess will be visible in the console.
+    showing_subprocess = True
+
+    command_desc = format_command_args(cmd)
+    try:
+        proc = subprocess.Popen(
+            # Convert HiddenText objects to the underlying str.
+            reveal_command_args(cmd),
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            cwd=cwd
+        )
+        if proc.stdin:
+            proc.stdin.close()
+    except Exception as exc:
+        if log_failed_cmd:
+            subprocess_logger.critical(
+                "Error %s while executing command %s", exc, command_desc,
+            )
+        raise
+    all_output = []
+    while True:
+        # The "line" value is a unicode string in Python 2.
+        line = None
+        if proc.stdout:
+            line = console_to_str(proc.stdout.readline())
+        if not line:
+            break
+        line = line.rstrip()
+        all_output.append(line + '\n')
+
+        # Show the line immediately.
+        log_subprocess(line)
+    try:
+        proc.wait()
+    finally:
+        if proc.stdout:
+            proc.stdout.close()
+
+    proc_had_error = (
+        proc.returncode and proc.returncode not in extra_ok_returncodes
+    )
+    if proc_had_error:
+        if not showing_subprocess and log_failed_cmd:
+            # Then the subprocess streams haven't been logged to the
+            # console yet.
+            msg = make_subprocess_output_error(
+                cmd_args=cmd,
+                cwd=cwd,
+                lines=all_output,
+                exit_status=proc.returncode,
+            )
+            subprocess_logger.error(msg)
+        exc_msg = (
+            'Command errored out with exit status {}: {} '
+            'Check the logs for full command output.'
+        ).format(proc.returncode, command_desc)
+        raise SubProcessError(exc_msg)
+    return ''.join(all_output)
+
+
+def find_path_to_setup_from_repo_root(location, repo_root):
+    # type: (str, str) -> Optional[str]
+    """
+    Find the path to `setup.py` by searching up the filesystem from `location`.
+    Return the path to `setup.py` relative to `repo_root`.
+    Return None if `setup.py` is in `repo_root` or cannot be found.
+    """
+    # find setup.py
+    orig_location = location
+    while not os.path.exists(os.path.join(location, 'setup.py')):
+        last_location = location
+        location = os.path.dirname(location)
+        if location == last_location:
+            # We've traversed up to the root of the filesystem without
+            # finding setup.py
+            logger.warning(
+                "Could not find setup.py for directory %s (tried all "
+                "parent directories)",
+                orig_location,
+            )
+            return None
+
+    if samefile(repo_root, location):
+        return None
+
+    return os.path.relpath(location, repo_root)
+
+
+class RemoteNotFoundError(Exception):
+    pass
+
+
+class RevOptions(object):
+
+    """
+    Encapsulates a VCS-specific revision to install, along with any VCS
+    install options.
+
+    Instances of this class should be treated as if immutable.
+    """
+
+    def __init__(
+        self,
+        vc_class,  # type: Type[VersionControl]
+        rev=None,  # type: Optional[str]
+        extra_args=None,  # type: Optional[CommandArgs]
+    ):
+        # type: (...) -> None
+        """
+        Args:
+          vc_class: a VersionControl subclass.
+          rev: the name of the revision to install.
+          extra_args: a list of extra options.
+        """
+        if extra_args is None:
+            extra_args = []
+
+        self.extra_args = extra_args
+        self.rev = rev
+        self.vc_class = vc_class
+        self.branch_name = None  # type: Optional[str]
+
+    def __repr__(self):
+        # type: () -> str
+        return '<RevOptions {}: rev={!r}>'.format(self.vc_class.name, self.rev)
+
+    @property
+    def arg_rev(self):
+        # type: () -> Optional[str]
+        if self.rev is None:
+            return self.vc_class.default_arg_rev
+
+        return self.rev
+
+    def to_args(self):
+        # type: () -> CommandArgs
+        """
+        Return the VCS-specific command arguments.
+        """
+        args = []  # type: CommandArgs
+        rev = self.arg_rev
+        if rev is not None:
+            args += self.vc_class.get_base_rev_args(rev)
+        args += self.extra_args
+
+        return args
+
+    def to_display(self):
+        # type: () -> str
+        if not self.rev:
+            return ''
+
+        return ' (to revision {})'.format(self.rev)
+
+    def make_new(self, rev):
+        # type: (str) -> RevOptions
+        """
+        Make a copy of the current instance, but with a new rev.
+
+        Args:
+          rev: the name of the revision for the new object.
+        """
+        return self.vc_class.make_rev_options(rev, extra_args=self.extra_args)
+
+
+class VcsSupport(object):
+    _registry = {}  # type: Dict[str, VersionControl]
+    schemes = ['ssh', 'git', 'hg', 'bzr', 'sftp', 'svn']
+
+    def __init__(self):
+        # type: () -> None
+        # Register more schemes with urlparse for various version control
+        # systems
+        urllib_parse.uses_netloc.extend(self.schemes)
+        # Python >= 2.7.4, 3.3 doesn't have uses_fragment
+        if getattr(urllib_parse, 'uses_fragment', None):
+            urllib_parse.uses_fragment.extend(self.schemes)
+        super(VcsSupport, self).__init__()
+
+    def __iter__(self):
+        # type: () -> Iterator[str]
+        return self._registry.__iter__()
+
+    @property
+    def backends(self):
+        # type: () -> List[VersionControl]
+        return list(self._registry.values())
+
+    @property
+    def dirnames(self):
+        # type: () -> List[str]
+        return [backend.dirname for backend in self.backends]
+
+    @property
+    def all_schemes(self):
+        # type: () -> List[str]
+        schemes = []  # type: List[str]
+        for backend in self.backends:
+            schemes.extend(backend.schemes)
+        return schemes
+
+    def register(self, cls):
+        # type: (Type[VersionControl]) -> None
+        if not hasattr(cls, 'name'):
+            logger.warning('Cannot register VCS %s', cls.__name__)
+            return
+        if cls.name not in self._registry:
+            self._registry[cls.name] = cls()
+            logger.debug('Registered VCS backend: %s', cls.name)
+
+    def unregister(self, name):
+        # type: (str) -> None
+        if name in self._registry:
+            del self._registry[name]
+
+    def get_backend_for_dir(self, location):
+        # type: (str) -> Optional[VersionControl]
+        """
+        Return a VersionControl object if a repository of that type is found
+        at the given directory.
+        """
+        vcs_backends = {}
+        for vcs_backend in self._registry.values():
+            repo_path = vcs_backend.get_repository_root(location)
+            if not repo_path:
+                continue
+            logger.debug('Determine that %s uses VCS: %s',
+                         location, vcs_backend.name)
+            vcs_backends[repo_path] = vcs_backend
+
+        if not vcs_backends:
+            return None
+
+        # Choose the VCS in the inner-most directory. Since all repository
+        # roots found here would be either `location` or one of its
+        # parents, the longest path should have the most path components,
+        # i.e. the backend representing the inner-most repository.
+        inner_most_repo_path = max(vcs_backends, key=len)
+        return vcs_backends[inner_most_repo_path]
+
+    def get_backend_for_scheme(self, scheme):
+        # type: (str) -> Optional[VersionControl]
+        """
+        Return a VersionControl object or None.
+        """
+        for vcs_backend in self._registry.values():
+            if scheme in vcs_backend.schemes:
+                return vcs_backend
+        return None
+
+    def get_backend(self, name):
+        # type: (str) -> Optional[VersionControl]
+        """
+        Return a VersionControl object or None.
+        """
+        name = name.lower()
+        return self._registry.get(name)
+
+
+vcs = VcsSupport()
+
+
+class VersionControl(object):
+    name = ''
+    dirname = ''
+    repo_name = ''
+    # List of supported schemes for this Version Control
+    schemes = ()  # type: Tuple[str, ...]
+    # Iterable of environment variable names to pass to call_subprocess().
+    unset_environ = ()  # type: Tuple[str, ...]
+    default_arg_rev = None  # type: Optional[str]
+
+    @classmethod
+    def should_add_vcs_url_prefix(cls, remote_url):
+        # type: (str) -> bool
+        """
+        Return whether the vcs prefix (e.g. "git+") should be added to a
+        repository's remote url when used in a requirement.
+        """
+        return not remote_url.lower().startswith('{}:'.format(cls.name))
+
+    @classmethod
+    def get_subdirectory(cls, location):
+        # type: (str) -> Optional[str]
+        """
+        Return the path to setup.py, relative to the repo root.
+        Return None if setup.py is in the repo root.
+        """
+        return None
+
+    @classmethod
+    def get_requirement_revision(cls, repo_dir):
+        # type: (str) -> str
+        """
+        Return the revision string that should be used in a requirement.
+        """
+        return cls.get_revision(repo_dir)
+
+    @classmethod
+    def get_src_requirement(cls, repo_dir, project_name):
+        # type: (str, str) -> Optional[str]
+        """
+        Return the requirement string to use to redownload the files
+        currently at the given repository directory.
+
+        Args:
+          project_name: the (unescaped) project name.
+
+        The return value has a form similar to the following:
+
+            {repository_url}@{revision}#egg={project_name}
+        """
+        repo_url = cls.get_remote_url(repo_dir)
+        if repo_url is None:
+            return None
+
+        if cls.should_add_vcs_url_prefix(repo_url):
+            repo_url = '{}+{}'.format(cls.name, repo_url)
+
+        revision = cls.get_requirement_revision(repo_dir)
+        subdir = cls.get_subdirectory(repo_dir)
+        req = make_vcs_requirement_url(repo_url, revision, project_name,
+                                       subdir=subdir)
+
+        return req
+
+    @staticmethod
+    def get_base_rev_args(rev):
+        # type: (str) -> List[str]
+        """
+        Return the base revision arguments for a vcs command.
+
+        Args:
+          rev: the name of a revision to install.  Cannot be None.
+        """
+        raise NotImplementedError
+
+    def is_immutable_rev_checkout(self, url, dest):
+        # type: (str, str) -> bool
+        """
+        Return true if the commit hash checked out at dest matches
+        the revision in url.
+
+        Always return False, if the VCS does not support immutable commit
+        hashes.
+
+        This method does not check if there are local uncommitted changes
+        in dest after checkout, as pip currently has no use case for that.
+        """
+        return False
+
+    @classmethod
+    def make_rev_options(cls, rev=None, extra_args=None):
+        # type: (Optional[str], Optional[CommandArgs]) -> RevOptions
+        """
+        Return a RevOptions object.
+
+        Args:
+          rev: the name of a revision to install.
+          extra_args: a list of extra options.
+        """
+        return RevOptions(cls, rev, extra_args=extra_args)
+
+    @classmethod
+    def _is_local_repository(cls, repo):
+        # type: (str) -> bool
+        """
+           posix absolute paths start with os.path.sep,
+           win32 ones start with drive (like c:\\folder)
+        """
+        drive, tail = os.path.splitdrive(repo)
+        return repo.startswith(os.path.sep) or bool(drive)
+
+    def export(self, location, url):
+        # type: (str, HiddenText) -> None
+        """
+        Export the repository at the url to the destination location
+        i.e. only download the files, without vcs informations
+
+        :param url: the repository URL starting with a vcs prefix.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def get_netloc_and_auth(cls, netloc, scheme):
+        # type: (str, str) -> Tuple[str, Tuple[Optional[str], Optional[str]]]
+        """
+        Parse the repository URL's netloc, and return the new netloc to use
+        along with auth information.
+
+        Args:
+          netloc: the original repository URL netloc.
+          scheme: the repository URL's scheme without the vcs prefix.
+
+        This is mainly for the Subversion class to override, so that auth
+        information can be provided via the --username and --password options
+        instead of through the URL.  For other subclasses like Git without
+        such an option, auth information must stay in the URL.
+
+        Returns: (netloc, (username, password)).
+        """
+        return netloc, (None, None)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url):
+        # type: (str) -> Tuple[str, Optional[str], AuthInfo]
+        """
+        Parse the repository URL to use, and return the URL, revision,
+        and auth info to use.
+
+        Returns: (url, rev, (username, password)).
+        """
+        scheme, netloc, path, query, frag = urllib_parse.urlsplit(url)
+        if '+' not in scheme:
+            raise ValueError(
+                "Sorry, {!r} is a malformed VCS url. "
+                "The format is <vcs>+<protocol>://<url>, "
+                "e.g. svn+http://myrepo/svn/MyApp#egg=MyApp".format(url)
+            )
+        # Remove the vcs prefix.
+        scheme = scheme.split('+', 1)[1]
+        netloc, user_pass = cls.get_netloc_and_auth(netloc, scheme)
+        rev = None
+        if '@' in path:
+            path, rev = path.rsplit('@', 1)
+            if not rev:
+                raise InstallationError(
+                    "The URL {!r} has an empty revision (after @) "
+                    "which is not supported. Include a revision after @ "
+                    "or remove @ from the URL.".format(url)
+                )
+        url = urllib_parse.urlunsplit((scheme, netloc, path, query, ''))
+        return url, rev, user_pass
+
+    @staticmethod
+    def make_rev_args(username, password):
+        # type: (Optional[str], Optional[HiddenText]) -> CommandArgs
+        """
+        Return the RevOptions "extra arguments" to use in obtain().
+        """
+        return []
+
+    def get_url_rev_options(self, url):
+        # type: (HiddenText) -> Tuple[HiddenText, RevOptions]
+        """
+        Return the URL and RevOptions object to use in obtain() and in
+        some cases export(), as a tuple (url, rev_options).
+        """
+        secret_url, rev, user_pass = self.get_url_rev_and_auth(url.secret)
+        username, secret_password = user_pass
+        password = None  # type: Optional[HiddenText]
+        if secret_password is not None:
+            password = hide_value(secret_password)
+        extra_args = self.make_rev_args(username, password)
+        rev_options = self.make_rev_options(rev, extra_args=extra_args)
+
+        return hide_url(secret_url), rev_options
+
+    @staticmethod
+    def normalize_url(url):
+        # type: (str) -> str
+        """
+        Normalize a URL for comparison by unquoting it and removing any
+        trailing slash.
+        """
+        return urllib_parse.unquote(url).rstrip('/')
+
+    @classmethod
+    def compare_urls(cls, url1, url2):
+        # type: (str, str) -> bool
+        """
+        Compare two repo URLs for identity, ignoring incidental differences.
+        """
+        return (cls.normalize_url(url1) == cls.normalize_url(url2))
+
+    def fetch_new(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        """
+        Fetch a revision from a repository, in the case that this is the
+        first fetch from the repository.
+
+        Args:
+          dest: the directory to fetch the repository to.
+          rev_options: a RevOptions object.
+        """
+        raise NotImplementedError
+
+    def switch(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        """
+        Switch the repo at ``dest`` to point to ``URL``.
+
+        Args:
+          rev_options: a RevOptions object.
+        """
+        raise NotImplementedError
+
+    def update(self, dest, url, rev_options):
+        # type: (str, HiddenText, RevOptions) -> None
+        """
+        Update an already-existing repo to the given ``rev_options``.
+
+        Args:
+          rev_options: a RevOptions object.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def is_commit_id_equal(cls, dest, name):
+        # type: (str, Optional[str]) -> bool
+        """
+        Return whether the id of the current commit equals the given name.
+
+        Args:
+          dest: the repository directory.
+          name: a string name.
+        """
+        raise NotImplementedError
+
+    def obtain(self, dest, url):
+        # type: (str, HiddenText) -> None
+        """
+        Install or update in editable mode the package represented by this
+        VersionControl object.
+
+        :param dest: the repository directory in which to install or update.
+        :param url: the repository URL starting with a vcs prefix.
+        """
+        url, rev_options = self.get_url_rev_options(url)
+
+        if not os.path.exists(dest):
+            self.fetch_new(dest, url, rev_options)
+            return
+
+        rev_display = rev_options.to_display()
+        if self.is_repository_directory(dest):
+            existing_url = self.get_remote_url(dest)
+            if self.compare_urls(existing_url, url.secret):
+                logger.debug(
+                    '%s in %s exists, and has correct URL (%s)',
+                    self.repo_name.title(),
+                    display_path(dest),
+                    url,
+                )
+                if not self.is_commit_id_equal(dest, rev_options.rev):
+                    logger.info(
+                        'Updating %s %s%s',
+                        display_path(dest),
+                        self.repo_name,
+                        rev_display,
+                    )
+                    self.update(dest, url, rev_options)
+                else:
+                    logger.info('Skipping because already up-to-date.')
+                return
+
+            logger.warning(
+                '%s %s in %s exists with URL %s',
+                self.name,
+                self.repo_name,
+                display_path(dest),
+                existing_url,
+            )
+            prompt = ('(s)witch, (i)gnore, (w)ipe, (b)ackup ',
+                      ('s', 'i', 'w', 'b'))
+        else:
+            logger.warning(
+                'Directory %s already exists, and is not a %s %s.',
+                dest,
+                self.name,
+                self.repo_name,
+            )
+            # https://github.com/python/mypy/issues/1174
+            prompt = ('(i)gnore, (w)ipe, (b)ackup ',  # type: ignore
+                      ('i', 'w', 'b'))
+
+        logger.warning(
+            'The plan is to install the %s repository %s',
+            self.name,
+            url,
+        )
+        response = ask_path_exists('What to do?  {}'.format(
+            prompt[0]), prompt[1])
+
+        if response == 'a':
+            sys.exit(-1)
+
+        if response == 'w':
+            logger.warning('Deleting %s', display_path(dest))
+            rmtree(dest)
+            self.fetch_new(dest, url, rev_options)
+            return
+
+        if response == 'b':
+            dest_dir = backup_dir(dest)
+            logger.warning(
+                'Backing up %s to %s', display_path(dest), dest_dir,
+            )
+            shutil.move(dest, dest_dir)
+            self.fetch_new(dest, url, rev_options)
+            return
+
+        # Do nothing if the response is "i".
+        if response == 's':
+            logger.info(
+                'Switching %s %s to %s%s',
+                self.repo_name,
+                display_path(dest),
+                url,
+                rev_display,
+            )
+            self.switch(dest, url, rev_options)
+
+    def unpack(self, location, url):
+        # type: (str, HiddenText) -> None
+        """
+        Clean up current location and download the url repository
+        (and vcs infos) into location
+
+        :param url: the repository URL starting with a vcs prefix.
+        """
+        if os.path.exists(location):
+            rmtree(location)
+        self.obtain(location, url=url)
+
+    @classmethod
+    def get_remote_url(cls, location):
+        # type: (str) -> str
+        """
+        Return the url used at location
+
+        Raises RemoteNotFoundError if the repository does not have a remote
+        url configured.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def get_revision(cls, location):
+        # type: (str) -> str
+        """
+        Return the current commit id of the files at the given location.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def run_command(
+        cls,
+        cmd,  # type: Union[List[str], CommandArgs]
+        cwd=None,  # type: Optional[str]
+        extra_environ=None,  # type: Optional[Mapping[str, Any]]
+        extra_ok_returncodes=None,  # type: Optional[Iterable[int]]
+        log_failed_cmd=True  # type: bool
+    ):
+        # type: (...) -> Text
+        """
+        Run a VCS subcommand
+        This is simply a wrapper around call_subprocess that adds the VCS
+        command name, and checks that the VCS is available
+        """
+        cmd = make_command(cls.name, *cmd)
+        try:
+            return call_subprocess(cmd, cwd,
+                                   extra_environ=extra_environ,
+                                   extra_ok_returncodes=extra_ok_returncodes,
+                                   log_failed_cmd=log_failed_cmd)
+        except OSError as e:
+            # errno.ENOENT = no such file or directory
+            # In other words, the VCS executable isn't available
+            if e.errno == errno.ENOENT:
+                raise BadCommand(
+                    'Cannot find command {cls.name!r} - do you have '
+                    '{cls.name!r} installed and in your '
+                    'PATH?'.format(**locals()))
+            else:
+                raise  # re-raise exception if a different error occurred
+
+    @classmethod
+    def is_repository_directory(cls, path):
+        # type: (str) -> bool
+        """
+        Return whether a directory path is a repository directory.
+        """
+        logger.debug('Checking in %s for %s (%s)...',
+                     path, cls.dirname, cls.name)
+        return os.path.exists(os.path.join(path, cls.dirname))
+
+    @classmethod
+    def get_repository_root(cls, location):
+        # type: (str) -> Optional[str]
+        """
+        Return the "root" (top-level) directory controlled by the vcs,
+        or `None` if the directory is not in any.
+
+        It is meant to be overridden to implement smarter detection
+        mechanisms for specific vcs.
+
+        This can do more than is_repository_directory() alone. For
+        example, the Git override checks that Git is actually available.
+        """
+        if cls.is_repository_directory(location):
+            return location
+        return None
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_internal/wheel_builder.py b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/wheel_builder.py
new file mode 100644
index 0000000..fa08016
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_internal/wheel_builder.py
@@ -0,0 +1,308 @@
+"""Orchestrator for building wheels from InstallRequirements.
+"""
+
+import logging
+import os.path
+import re
+import shutil
+
+from pip._internal.models.link import Link
+from pip._internal.operations.build.wheel import build_wheel_pep517
+from pip._internal.operations.build.wheel_legacy import build_wheel_legacy
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import ensure_dir, hash_file, is_wheel_installed
+from pip._internal.utils.setuptools_build import make_setuptools_clean_args
+from pip._internal.utils.subprocess import call_subprocess
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.urls import path_to_url
+from pip._internal.vcs import vcs
+
+if MYPY_CHECK_RUNNING:
+    from typing import (
+        Any, Callable, Iterable, List, Optional, Tuple,
+    )
+
+    from pip._internal.cache import WheelCache
+    from pip._internal.req.req_install import InstallRequirement
+
+    BinaryAllowedPredicate = Callable[[InstallRequirement], bool]
+    BuildResult = Tuple[List[InstallRequirement], List[InstallRequirement]]
+
+logger = logging.getLogger(__name__)
+
+_egg_info_re = re.compile(r'([a-z0-9_.]+)-([a-z0-9_.!+-]+)', re.IGNORECASE)
+
+
+def _contains_egg_info(s):
+    # type: (str) -> bool
+    """Determine whether the string looks like an egg_info.
+
+    :param s: The string to parse. E.g. foo-2.1
+    """
+    return bool(_egg_info_re.search(s))
+
+
+def _should_build(
+    req,  # type: InstallRequirement
+    need_wheel,  # type: bool
+    check_binary_allowed,  # type: BinaryAllowedPredicate
+):
+    # type: (...) -> bool
+    """Return whether an InstallRequirement should be built into a wheel."""
+    if req.constraint:
+        # never build requirements that are merely constraints
+        return False
+    if req.is_wheel:
+        if need_wheel:
+            logger.info(
+                'Skipping %s, due to already being wheel.', req.name,
+            )
+        return False
+
+    if need_wheel:
+        # i.e. pip wheel, not pip install
+        return True
+
+    # From this point, this concerns the pip install command only
+    # (need_wheel=False).
+
+    if req.editable or not req.source_dir:
+        return False
+
+    if not check_binary_allowed(req):
+        logger.info(
+            "Skipping wheel build for %s, due to binaries "
+            "being disabled for it.", req.name,
+        )
+        return False
+
+    if not req.use_pep517 and not is_wheel_installed():
+        # we don't build legacy requirements if wheel is not installed
+        logger.info(
+            "Using legacy 'setup.py install' for %s, "
+            "since package 'wheel' is not installed.", req.name,
+        )
+        return False
+
+    return True
+
+
+def should_build_for_wheel_command(
+    req,  # type: InstallRequirement
+):
+    # type: (...) -> bool
+    return _should_build(
+        req, need_wheel=True, check_binary_allowed=_always_true
+    )
+
+
+def should_build_for_install_command(
+    req,  # type: InstallRequirement
+    check_binary_allowed,  # type: BinaryAllowedPredicate
+):
+    # type: (...) -> bool
+    return _should_build(
+        req, need_wheel=False, check_binary_allowed=check_binary_allowed
+    )
+
+
+def _should_cache(
+    req,  # type: InstallRequirement
+):
+    # type: (...) -> Optional[bool]
+    """
+    Return whether a built InstallRequirement can be stored in the persistent
+    wheel cache, assuming the wheel cache is available, and _should_build()
+    has determined a wheel needs to be built.
+    """
+    if req.editable or not req.source_dir:
+        # never cache editable requirements
+        return False
+
+    if req.link and req.link.is_vcs:
+        # VCS checkout. Do not cache
+        # unless it points to an immutable commit hash.
+        assert not req.editable
+        assert req.source_dir
+        vcs_backend = vcs.get_backend_for_scheme(req.link.scheme)
+        assert vcs_backend
+        if vcs_backend.is_immutable_rev_checkout(req.link.url, req.source_dir):
+            return True
+        return False
+
+    assert req.link
+    base, ext = req.link.splitext()
+    if _contains_egg_info(base):
+        return True
+
+    # Otherwise, do not cache.
+    return False
+
+
+def _get_cache_dir(
+    req,  # type: InstallRequirement
+    wheel_cache,  # type: WheelCache
+):
+    # type: (...) -> str
+    """Return the persistent or temporary cache directory where the built
+    wheel need to be stored.
+    """
+    cache_available = bool(wheel_cache.cache_dir)
+    assert req.link
+    if cache_available and _should_cache(req):
+        cache_dir = wheel_cache.get_path_for_link(req.link)
+    else:
+        cache_dir = wheel_cache.get_ephem_path_for_link(req.link)
+    return cache_dir
+
+
+def _always_true(_):
+    # type: (Any) -> bool
+    return True
+
+
+def _build_one(
+    req,  # type: InstallRequirement
+    output_dir,  # type: str
+    build_options,  # type: List[str]
+    global_options,  # type: List[str]
+):
+    # type: (...) -> Optional[str]
+    """Build one wheel.
+
+    :return: The filename of the built wheel, or None if the build failed.
+    """
+    try:
+        ensure_dir(output_dir)
+    except OSError as e:
+        logger.warning(
+            "Building wheel for %s failed: %s",
+            req.name, e,
+        )
+        return None
+
+    # Install build deps into temporary directory (PEP 518)
+    with req.build_env:
+        return _build_one_inside_env(
+            req, output_dir, build_options, global_options
+        )
+
+
+def _build_one_inside_env(
+    req,  # type: InstallRequirement
+    output_dir,  # type: str
+    build_options,  # type: List[str]
+    global_options,  # type: List[str]
+):
+    # type: (...) -> Optional[str]
+    with TempDirectory(kind="wheel") as temp_dir:
+        assert req.name
+        if req.use_pep517:
+            assert req.metadata_directory
+            wheel_path = build_wheel_pep517(
+                name=req.name,
+                backend=req.pep517_backend,
+                metadata_directory=req.metadata_directory,
+                build_options=build_options,
+                tempd=temp_dir.path,
+            )
+        else:
+            wheel_path = build_wheel_legacy(
+                name=req.name,
+                setup_py_path=req.setup_py_path,
+                source_dir=req.unpacked_source_directory,
+                global_options=global_options,
+                build_options=build_options,
+                tempd=temp_dir.path,
+            )
+
+        if wheel_path is not None:
+            wheel_name = os.path.basename(wheel_path)
+            dest_path = os.path.join(output_dir, wheel_name)
+            try:
+                wheel_hash, length = hash_file(wheel_path)
+                shutil.move(wheel_path, dest_path)
+                logger.info('Created wheel for %s: '
+                            'filename=%s size=%d sha256=%s',
+                            req.name, wheel_name, length,
+                            wheel_hash.hexdigest())
+                logger.info('Stored in directory: %s', output_dir)
+                return dest_path
+            except Exception as e:
+                logger.warning(
+                    "Building wheel for %s failed: %s",
+                    req.name, e,
+                )
+        # Ignore return, we can't do anything else useful.
+        if not req.use_pep517:
+            _clean_one_legacy(req, global_options)
+        return None
+
+
+def _clean_one_legacy(req, global_options):
+    # type: (InstallRequirement, List[str]) -> bool
+    clean_args = make_setuptools_clean_args(
+        req.setup_py_path,
+        global_options=global_options,
+    )
+
+    logger.info('Running setup.py clean for %s', req.name)
+    try:
+        call_subprocess(clean_args, cwd=req.source_dir)
+        return True
+    except Exception:
+        logger.error('Failed cleaning build dir for %s', req.name)
+        return False
+
+
+def build(
+    requirements,  # type: Iterable[InstallRequirement]
+    wheel_cache,  # type: WheelCache
+    build_options,  # type: List[str]
+    global_options,  # type: List[str]
+):
+    # type: (...) -> BuildResult
+    """Build wheels.
+
+    :return: The list of InstallRequirement that succeeded to build and
+        the list of InstallRequirement that failed to build.
+    """
+    if not requirements:
+        return [], []
+
+    # Build the wheels.
+    logger.info(
+        'Building wheels for collected packages: %s',
+        ', '.join(req.name for req in requirements),  # type: ignore
+    )
+
+    with indent_log():
+        build_successes, build_failures = [], []
+        for req in requirements:
+            cache_dir = _get_cache_dir(req, wheel_cache)
+            wheel_file = _build_one(
+                req, cache_dir, build_options, global_options
+            )
+            if wheel_file:
+                # Update the link for this.
+                req.link = Link(path_to_url(wheel_file))
+                req.local_file_path = req.link.file_path
+                assert req.link.is_wheel
+                build_successes.append(req)
+            else:
+                build_failures.append(req)
+
+    # notify success/failure
+    if build_successes:
+        logger.info(
+            'Successfully built %s',
+            ' '.join([req.name for req in build_successes]),  # type: ignore
+        )
+    if build_failures:
+        logger.info(
+            'Failed to build %s',
+            ' '.join([req.name for req in build_failures]),  # type: ignore
+        )
+    # Return a list of requirements that failed to build
+    return build_successes, build_failures
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/__init__.py
new file mode 100644
index 0000000..581db54
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/__init__.py
@@ -0,0 +1,110 @@
+"""
+pip._vendor is for vendoring dependencies of pip to prevent needing pip to
+depend on something external.
+
+Files inside of pip._vendor should be considered immutable and should only be
+updated to versions from upstream.
+"""
+from __future__ import absolute_import
+
+import glob
+import os.path
+import sys
+
+# Downstream redistributors which have debundled our dependencies should also
+# patch this value to be true. This will trigger the additional patching
+# to cause things like "six" to be available as pip.
+DEBUNDLED = False
+
+# By default, look in this directory for a bunch of .whl files which we will
+# add to the beginning of sys.path before attempting to import anything. This
+# is done to support downstream re-distributors like Debian and Fedora who
+# wish to create their own Wheels for our dependencies to aid in debundling.
+WHEEL_DIR = os.path.abspath(os.path.dirname(__file__))
+
+
+# Define a small helper function to alias our vendored modules to the real ones
+# if the vendored ones do not exist. This idea of this was taken from
+# https://github.com/kennethreitz/requests/pull/2567.
+def vendored(modulename):
+    vendored_name = "{0}.{1}".format(__name__, modulename)
+
+    try:
+        __import__(modulename, globals(), locals(), level=0)
+    except ImportError:
+        # This error used to be silenced in earlier variants of this file, to instead
+        # raise the error when pip actually tries to use the missing module. 
+        # Based on inputs in #5354, this was changed to explicitly raise the error.
+        # Re-raising the exception without modifying it is an intentional choice. 
+        raise
+    else:
+        sys.modules[vendored_name] = sys.modules[modulename]
+        base, head = vendored_name.rsplit(".", 1)
+        setattr(sys.modules[base], head, sys.modules[modulename])
+
+
+# If we're operating in a debundled setup, then we want to go ahead and trigger
+# the aliasing of our vendored libraries as well as looking for wheels to add
+# to our sys.path. This will cause all of this code to be a no-op typically
+# however downstream redistributors can enable it in a consistent way across
+# all platforms.
+if DEBUNDLED:
+    # Actually look inside of WHEEL_DIR to find .whl files and add them to the
+    # front of our sys.path.
+    sys.path[:] = glob.glob(os.path.join(WHEEL_DIR, "*.whl")) + sys.path
+
+    # Actually alias all of our vendored dependencies.
+    vendored("appdirs")
+    vendored("cachecontrol")
+    vendored("certifi")
+    vendored("colorama")
+    vendored("contextlib2")
+    vendored("distlib")
+    vendored("distro")
+    vendored("html5lib")
+    vendored("six")
+    vendored("six.moves")
+    vendored("six.moves.urllib")
+    vendored("six.moves.urllib.parse")
+    vendored("packaging")
+    vendored("packaging.version")
+    vendored("packaging.specifiers")
+    vendored("pep517")
+    vendored("pkg_resources")
+    vendored("progress")
+    vendored("retrying")
+    vendored("requests")
+    vendored("requests.exceptions")
+    vendored("requests.packages")
+    vendored("requests.packages.urllib3")
+    vendored("requests.packages.urllib3._collections")
+    vendored("requests.packages.urllib3.connection")
+    vendored("requests.packages.urllib3.connectionpool")
+    vendored("requests.packages.urllib3.contrib")
+    vendored("requests.packages.urllib3.contrib.ntlmpool")
+    vendored("requests.packages.urllib3.contrib.pyopenssl")
+    vendored("requests.packages.urllib3.exceptions")
+    vendored("requests.packages.urllib3.fields")
+    vendored("requests.packages.urllib3.filepost")
+    vendored("requests.packages.urllib3.packages")
+    vendored("requests.packages.urllib3.packages.ordered_dict")
+    vendored("requests.packages.urllib3.packages.six")
+    vendored("requests.packages.urllib3.packages.ssl_match_hostname")
+    vendored("requests.packages.urllib3.packages.ssl_match_hostname."
+             "_implementation")
+    vendored("requests.packages.urllib3.poolmanager")
+    vendored("requests.packages.urllib3.request")
+    vendored("requests.packages.urllib3.response")
+    vendored("requests.packages.urllib3.util")
+    vendored("requests.packages.urllib3.util.connection")
+    vendored("requests.packages.urllib3.util.request")
+    vendored("requests.packages.urllib3.util.response")
+    vendored("requests.packages.urllib3.util.retry")
+    vendored("requests.packages.urllib3.util.ssl_")
+    vendored("requests.packages.urllib3.util.timeout")
+    vendored("requests.packages.urllib3.util.url")
+    vendored("resolvelib")
+    vendored("toml")
+    vendored("toml.encoder")
+    vendored("toml.decoder")
+    vendored("urllib3")
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/appdirs.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/appdirs.py
new file mode 100644
index 0000000..33a3b77
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/appdirs.py
@@ -0,0 +1,633 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) 2005-2010 ActiveState Software Inc.
+# Copyright (c) 2013 Eddy Petrișor
+
+"""Utilities for determining application-specific dirs.
+
+See <http://github.com/ActiveState/appdirs> for details and usage.
+"""
+# Dev Notes:
+# - MSDN on where to store app data files:
+#   http://support.microsoft.com/default.aspx?scid=kb;en-us;310294#XSLTH3194121123120121120120
+# - Mac OS X: http://developer.apple.com/documentation/MacOSX/Conceptual/BPFileSystem/index.html
+# - XDG spec for Un*x: http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+
+__version__ = "1.4.4"
+__version_info__ = tuple(int(segment) for segment in __version__.split("."))
+
+
+import sys
+import os
+
+PY3 = sys.version_info[0] == 3
+
+if PY3:
+    unicode = str
+
+if sys.platform.startswith('java'):
+    import platform
+    os_name = platform.java_ver()[3][0]
+    if os_name.startswith('Windows'): # "Windows XP", "Windows 7", etc.
+        system = 'win32'
+    elif os_name.startswith('Mac'): # "Mac OS X", etc.
+        system = 'darwin'
+    else: # "Linux", "SunOS", "FreeBSD", etc.
+        # Setting this to "linux2" is not ideal, but only Windows or Mac
+        # are actually checked for and the rest of the module expects
+        # *sys.platform* style strings.
+        system = 'linux2'
+elif sys.platform == 'cli' and os.name == 'nt':
+    # Detect Windows in IronPython to match pip._internal.utils.compat.WINDOWS
+    # Discussion: <https://github.com/pypa/pip/pull/7501>
+    system = 'win32'
+else:
+    system = sys.platform
+
+
+
+def user_data_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user data directories are:
+        Mac OS X:               ~/Library/Application Support/<AppName>  # or ~/.config/<AppName>, if the other does not exist
+        Unix:                   ~/.local/share/<AppName>    # or in $XDG_DATA_HOME, if defined
+        Win XP (not roaming):   C:\Documents and Settings\<username>\Application Data\<AppAuthor>\<AppName>
+        Win XP (roaming):       C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>
+        Win 7  (not roaming):   C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>
+        Win 7  (roaming):       C:\Users\<username>\AppData\Roaming\<AppAuthor>\<AppName>
+
+    For Unix, we follow the XDG spec and support $XDG_DATA_HOME.
+    That means, by default "~/.local/share/<AppName>".
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        const = roaming and "CSIDL_APPDATA" or "CSIDL_LOCAL_APPDATA"
+        path = os.path.normpath(_get_win_folder(const))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+    elif system == 'darwin':
+        path = os.path.expanduser('~/Library/Application Support/')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        path = os.getenv('XDG_DATA_HOME', os.path.expanduser("~/.local/share"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def site_data_dir(appname=None, appauthor=None, version=None, multipath=False):
+    r"""Return full path to the user-shared data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "multipath" is an optional parameter only applicable to *nix
+            which indicates that the entire list of data dirs should be
+            returned. By default, the first item from XDG_DATA_DIRS is
+            returned, or '/usr/local/share/<AppName>',
+            if XDG_DATA_DIRS is not set
+
+    Typical site data directories are:
+        Mac OS X:   /Library/Application Support/<AppName>
+        Unix:       /usr/local/share/<AppName> or /usr/share/<AppName>
+        Win XP:     C:\Documents and Settings\All Users\Application Data\<AppAuthor>\<AppName>
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
+        Win 7:      C:\ProgramData\<AppAuthor>\<AppName>   # Hidden, but writeable on Win 7.
+
+    For Unix, this is using the $XDG_DATA_DIRS[0] default.
+
+    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        path = os.path.normpath(_get_win_folder("CSIDL_COMMON_APPDATA"))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+    elif system == 'darwin':
+        path = os.path.expanduser('/Library/Application Support')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        # XDG default for $XDG_DATA_DIRS
+        # only first, if multipath is False
+        path = os.getenv('XDG_DATA_DIRS',
+                         os.pathsep.join(['/usr/local/share', '/usr/share']))
+        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
+        if appname:
+            if version:
+                appname = os.path.join(appname, version)
+            pathlist = [os.path.join(x, appname) for x in pathlist]
+
+        if multipath:
+            path = os.pathsep.join(pathlist)
+        else:
+            path = pathlist[0]
+        return path
+
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_config_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific config dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user config directories are:
+        Mac OS X:               same as user_data_dir
+        Unix:                   ~/.config/<AppName>     # or in $XDG_CONFIG_HOME, if defined
+        Win *:                  same as user_data_dir
+
+    For Unix, we follow the XDG spec and support $XDG_CONFIG_HOME.
+    That means, by default "~/.config/<AppName>".
+    """
+    if system in ["win32", "darwin"]:
+        path = user_data_dir(appname, appauthor, None, roaming)
+    else:
+        path = os.getenv('XDG_CONFIG_HOME', os.path.expanduser("~/.config"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+# for the discussion regarding site_config_dir locations
+# see <https://github.com/pypa/pip/issues/1733>
+def site_config_dir(appname=None, appauthor=None, version=None, multipath=False):
+    r"""Return full path to the user-shared data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "multipath" is an optional parameter only applicable to *nix
+            which indicates that the entire list of config dirs should be
+            returned. By default, the first item from XDG_CONFIG_DIRS is
+            returned, or '/etc/xdg/<AppName>', if XDG_CONFIG_DIRS is not set
+
+    Typical site config directories are:
+        Mac OS X:   same as site_data_dir
+        Unix:       /etc/xdg/<AppName> or $XDG_CONFIG_DIRS[i]/<AppName> for each value in
+                    $XDG_CONFIG_DIRS
+        Win *:      same as site_data_dir
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
+
+    For Unix, this is using the $XDG_CONFIG_DIRS[0] default, if multipath=False
+
+    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
+    """
+    if system in ["win32", "darwin"]:
+        path = site_data_dir(appname, appauthor)
+        if appname and version:
+            path = os.path.join(path, version)
+    else:
+        # XDG default for $XDG_CONFIG_DIRS (missing or empty)
+        # see <https://github.com/pypa/pip/pull/7501#discussion_r360624829>
+        # only first, if multipath is False
+        path = os.getenv('XDG_CONFIG_DIRS') or '/etc/xdg'
+        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep) if x]
+        if appname:
+            if version:
+                appname = os.path.join(appname, version)
+            pathlist = [os.path.join(x, appname) for x in pathlist]
+
+        if multipath:
+            path = os.pathsep.join(pathlist)
+        else:
+            path = pathlist[0]
+    return path
+
+
+def user_cache_dir(appname=None, appauthor=None, version=None, opinion=True):
+    r"""Return full path to the user-specific cache dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "opinion" (boolean) can be False to disable the appending of
+            "Cache" to the base app data dir for Windows. See
+            discussion below.
+
+    Typical user cache directories are:
+        Mac OS X:   ~/Library/Caches/<AppName>
+        Unix:       ~/.cache/<AppName> (XDG default)
+        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Cache
+        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Cache
+
+    On Windows the only suggestion in the MSDN docs is that local settings go in
+    the `CSIDL_LOCAL_APPDATA` directory. This is identical to the non-roaming
+    app data dir (the default returned by `user_data_dir` above). Apps typically
+    put cache data somewhere *under* the given dir here. Some examples:
+        ...\Mozilla\Firefox\Profiles\<ProfileName>\Cache
+        ...\Acme\SuperApp\Cache\1.0
+    OPINION: This function appends "Cache" to the `CSIDL_LOCAL_APPDATA` value.
+    This can be disabled with the `opinion=False` option.
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        path = os.path.normpath(_get_win_folder("CSIDL_LOCAL_APPDATA"))
+        # When using Python 2, return paths as bytes on Windows like we do on
+        # other operating systems. See helper function docs for more details.
+        if not PY3 and isinstance(path, unicode):
+            path = _win_path_to_bytes(path)
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+            if opinion:
+                path = os.path.join(path, "Cache")
+    elif system == 'darwin':
+        path = os.path.expanduser('~/Library/Caches')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        path = os.getenv('XDG_CACHE_HOME', os.path.expanduser('~/.cache'))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_state_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific state dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user state directories are:
+        Mac OS X:  same as user_data_dir
+        Unix:      ~/.local/state/<AppName>   # or in $XDG_STATE_HOME, if defined
+        Win *:     same as user_data_dir
+
+    For Unix, we follow this Debian proposal <https://wiki.debian.org/XDGBaseDirectorySpecification#state>
+    to extend the XDG spec and support $XDG_STATE_HOME.
+
+    That means, by default "~/.local/state/<AppName>".
+    """
+    if system in ["win32", "darwin"]:
+        path = user_data_dir(appname, appauthor, None, roaming)
+    else:
+        path = os.getenv('XDG_STATE_HOME', os.path.expanduser("~/.local/state"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_log_dir(appname=None, appauthor=None, version=None, opinion=True):
+    r"""Return full path to the user-specific log dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "opinion" (boolean) can be False to disable the appending of
+            "Logs" to the base app data dir for Windows, and "log" to the
+            base cache dir for Unix. See discussion below.
+
+    Typical user log directories are:
+        Mac OS X:   ~/Library/Logs/<AppName>
+        Unix:       ~/.cache/<AppName>/log  # or under $XDG_CACHE_HOME if defined
+        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Logs
+        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Logs
+
+    On Windows the only suggestion in the MSDN docs is that local settings
+    go in the `CSIDL_LOCAL_APPDATA` directory. (Note: I'm interested in
+    examples of what some windows apps use for a logs dir.)
+
+    OPINION: This function appends "Logs" to the `CSIDL_LOCAL_APPDATA`
+    value for Windows and appends "log" to the user cache dir for Unix.
+    This can be disabled with the `opinion=False` option.
+    """
+    if system == "darwin":
+        path = os.path.join(
+            os.path.expanduser('~/Library/Logs'),
+            appname)
+    elif system == "win32":
+        path = user_data_dir(appname, appauthor, version)
+        version = False
+        if opinion:
+            path = os.path.join(path, "Logs")
+    else:
+        path = user_cache_dir(appname, appauthor, version)
+        version = False
+        if opinion:
+            path = os.path.join(path, "log")
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+class AppDirs(object):
+    """Convenience wrapper for getting application dirs."""
+    def __init__(self, appname=None, appauthor=None, version=None,
+            roaming=False, multipath=False):
+        self.appname = appname
+        self.appauthor = appauthor
+        self.version = version
+        self.roaming = roaming
+        self.multipath = multipath
+
+    @property
+    def user_data_dir(self):
+        return user_data_dir(self.appname, self.appauthor,
+                             version=self.version, roaming=self.roaming)
+
+    @property
+    def site_data_dir(self):
+        return site_data_dir(self.appname, self.appauthor,
+                             version=self.version, multipath=self.multipath)
+
+    @property
+    def user_config_dir(self):
+        return user_config_dir(self.appname, self.appauthor,
+                               version=self.version, roaming=self.roaming)
+
+    @property
+    def site_config_dir(self):
+        return site_config_dir(self.appname, self.appauthor,
+                             version=self.version, multipath=self.multipath)
+
+    @property
+    def user_cache_dir(self):
+        return user_cache_dir(self.appname, self.appauthor,
+                              version=self.version)
+
+    @property
+    def user_state_dir(self):
+        return user_state_dir(self.appname, self.appauthor,
+                              version=self.version)
+
+    @property
+    def user_log_dir(self):
+        return user_log_dir(self.appname, self.appauthor,
+                            version=self.version)
+
+
+#---- internal support stuff
+
+def _get_win_folder_from_registry(csidl_name):
+    """This is a fallback technique at best. I'm not sure if using the
+    registry for this guarantees us the correct answer for all CSIDL_*
+    names.
+    """
+    if PY3:
+      import winreg as _winreg
+    else:
+      import _winreg
+
+    shell_folder_name = {
+        "CSIDL_APPDATA": "AppData",
+        "CSIDL_COMMON_APPDATA": "Common AppData",
+        "CSIDL_LOCAL_APPDATA": "Local AppData",
+    }[csidl_name]
+
+    key = _winreg.OpenKey(
+        _winreg.HKEY_CURRENT_USER,
+        r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
+    )
+    dir, type = _winreg.QueryValueEx(key, shell_folder_name)
+    return dir
+
+
+def _get_win_folder_with_pywin32(csidl_name):
+    from win32com.shell import shellcon, shell
+    dir = shell.SHGetFolderPath(0, getattr(shellcon, csidl_name), 0, 0)
+    # Try to make this a unicode path because SHGetFolderPath does
+    # not return unicode strings when there is unicode data in the
+    # path.
+    try:
+        dir = unicode(dir)
+
+        # Downgrade to short path name if have highbit chars. See
+        # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+        has_high_char = False
+        for c in dir:
+            if ord(c) > 255:
+                has_high_char = True
+                break
+        if has_high_char:
+            try:
+                import win32api
+                dir = win32api.GetShortPathName(dir)
+            except ImportError:
+                pass
+    except UnicodeError:
+        pass
+    return dir
+
+
+def _get_win_folder_with_ctypes(csidl_name):
+    import ctypes
+
+    csidl_const = {
+        "CSIDL_APPDATA": 26,
+        "CSIDL_COMMON_APPDATA": 35,
+        "CSIDL_LOCAL_APPDATA": 28,
+    }[csidl_name]
+
+    buf = ctypes.create_unicode_buffer(1024)
+    ctypes.windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in buf:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf2 = ctypes.create_unicode_buffer(1024)
+        if ctypes.windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
+            buf = buf2
+
+    return buf.value
+
+def _get_win_folder_with_jna(csidl_name):
+    import array
+    from com.sun import jna
+    from com.sun.jna.platform import win32
+
+    buf_size = win32.WinDef.MAX_PATH * 2
+    buf = array.zeros('c', buf_size)
+    shell = win32.Shell32.INSTANCE
+    shell.SHGetFolderPath(None, getattr(win32.ShlObj, csidl_name), None, win32.ShlObj.SHGFP_TYPE_CURRENT, buf)
+    dir = jna.Native.toString(buf.tostring()).rstrip("\0")
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in dir:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf = array.zeros('c', buf_size)
+        kernel = win32.Kernel32.INSTANCE
+        if kernel.GetShortPathName(dir, buf, buf_size):
+            dir = jna.Native.toString(buf.tostring()).rstrip("\0")
+
+    return dir
+
+if system == "win32":
+    try:
+        from ctypes import windll
+        _get_win_folder = _get_win_folder_with_ctypes
+    except ImportError:
+        try:
+            import com.sun.jna
+            _get_win_folder = _get_win_folder_with_jna
+        except ImportError:
+            _get_win_folder = _get_win_folder_from_registry
+
+
+def _win_path_to_bytes(path):
+    """Encode Windows paths to bytes. Only used on Python 2.
+
+    Motivation is to be consistent with other operating systems where paths
+    are also returned as bytes. This avoids problems mixing bytes and Unicode
+    elsewhere in the codebase. For more details and discussion see
+    <https://github.com/pypa/pip/issues/3463>.
+
+    If encoding using ASCII and MBCS fails, return the original Unicode path.
+    """
+    for encoding in ('ASCII', 'MBCS'):
+        try:
+            return path.encode(encoding)
+        except (UnicodeEncodeError, LookupError):
+            pass
+    return path
+
+
+#---- self test code
+
+if __name__ == "__main__":
+    appname = "MyApp"
+    appauthor = "MyCompany"
+
+    props = ("user_data_dir",
+             "user_config_dir",
+             "user_cache_dir",
+             "user_state_dir",
+             "user_log_dir",
+             "site_data_dir",
+             "site_config_dir")
+
+    print("-- app dirs %s --" % __version__)
+
+    print("-- app dirs (with optional 'version')")
+    dirs = AppDirs(appname, appauthor, version="1.0")
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (without optional 'version')")
+    dirs = AppDirs(appname, appauthor)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (without optional 'appauthor')")
+    dirs = AppDirs(appname)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (with disabled 'appauthor')")
+    dirs = AppDirs(appname, appauthor=False)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/__init__.py
new file mode 100644
index 0000000..a1bbbbe
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/__init__.py
@@ -0,0 +1,11 @@
+"""CacheControl import Interface.
+
+Make it easy to import from cachecontrol without long namespaces.
+"""
+__author__ = "Eric Larson"
+__email__ = "eric@ionrock.org"
+__version__ = "0.12.6"
+
+from .wrapper import CacheControl
+from .adapter import CacheControlAdapter
+from .controller import CacheController
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/_cmd.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/_cmd.py
new file mode 100644
index 0000000..f1e0ad9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/_cmd.py
@@ -0,0 +1,57 @@
+import logging
+
+from pip._vendor import requests
+
+from pip._vendor.cachecontrol.adapter import CacheControlAdapter
+from pip._vendor.cachecontrol.cache import DictCache
+from pip._vendor.cachecontrol.controller import logger
+
+from argparse import ArgumentParser
+
+
+def setup_logging():
+    logger.setLevel(logging.DEBUG)
+    handler = logging.StreamHandler()
+    logger.addHandler(handler)
+
+
+def get_session():
+    adapter = CacheControlAdapter(
+        DictCache(), cache_etags=True, serializer=None, heuristic=None
+    )
+    sess = requests.Session()
+    sess.mount("http://", adapter)
+    sess.mount("https://", adapter)
+
+    sess.cache_controller = adapter.controller
+    return sess
+
+
+def get_args():
+    parser = ArgumentParser()
+    parser.add_argument("url", help="The URL to try and cache")
+    return parser.parse_args()
+
+
+def main(args=None):
+    args = get_args()
+    sess = get_session()
+
+    # Make a request to get a response
+    resp = sess.get(args.url)
+
+    # Turn on logging
+    setup_logging()
+
+    # try setting the cache
+    sess.cache_controller.cache_response(resp.request, resp.raw)
+
+    # Now try to get it
+    if sess.cache_controller.cached_request(resp.request):
+        print("Cached!")
+    else:
+        print("Not cached :(")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/adapter.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/adapter.py
new file mode 100644
index 0000000..815650e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/adapter.py
@@ -0,0 +1,133 @@
+import types
+import functools
+import zlib
+
+from pip._vendor.requests.adapters import HTTPAdapter
+
+from .controller import CacheController
+from .cache import DictCache
+from .filewrapper import CallbackFileWrapper
+
+
+class CacheControlAdapter(HTTPAdapter):
+    invalidating_methods = {"PUT", "DELETE"}
+
+    def __init__(
+        self,
+        cache=None,
+        cache_etags=True,
+        controller_class=None,
+        serializer=None,
+        heuristic=None,
+        cacheable_methods=None,
+        *args,
+        **kw
+    ):
+        super(CacheControlAdapter, self).__init__(*args, **kw)
+        self.cache = DictCache() if cache is None else cache
+        self.heuristic = heuristic
+        self.cacheable_methods = cacheable_methods or ("GET",)
+
+        controller_factory = controller_class or CacheController
+        self.controller = controller_factory(
+            self.cache, cache_etags=cache_etags, serializer=serializer
+        )
+
+    def send(self, request, cacheable_methods=None, **kw):
+        """
+        Send a request. Use the request information to see if it
+        exists in the cache and cache the response if we need to and can.
+        """
+        cacheable = cacheable_methods or self.cacheable_methods
+        if request.method in cacheable:
+            try:
+                cached_response = self.controller.cached_request(request)
+            except zlib.error:
+                cached_response = None
+            if cached_response:
+                return self.build_response(request, cached_response, from_cache=True)
+
+            # check for etags and add headers if appropriate
+            request.headers.update(self.controller.conditional_headers(request))
+
+        resp = super(CacheControlAdapter, self).send(request, **kw)
+
+        return resp
+
+    def build_response(
+        self, request, response, from_cache=False, cacheable_methods=None
+    ):
+        """
+        Build a response by making a request or using the cache.
+
+        This will end up calling send and returning a potentially
+        cached response
+        """
+        cacheable = cacheable_methods or self.cacheable_methods
+        if not from_cache and request.method in cacheable:
+            # Check for any heuristics that might update headers
+            # before trying to cache.
+            if self.heuristic:
+                response = self.heuristic.apply(response)
+
+            # apply any expiration heuristics
+            if response.status == 304:
+                # We must have sent an ETag request. This could mean
+                # that we've been expired already or that we simply
+                # have an etag. In either case, we want to try and
+                # update the cache if that is the case.
+                cached_response = self.controller.update_cached_response(
+                    request, response
+                )
+
+                if cached_response is not response:
+                    from_cache = True
+
+                # We are done with the server response, read a
+                # possible response body (compliant servers will
+                # not return one, but we cannot be 100% sure) and
+                # release the connection back to the pool.
+                response.read(decode_content=False)
+                response.release_conn()
+
+                response = cached_response
+
+            # We always cache the 301 responses
+            elif response.status == 301:
+                self.controller.cache_response(request, response)
+            else:
+                # Wrap the response file with a wrapper that will cache the
+                #   response when the stream has been consumed.
+                response._fp = CallbackFileWrapper(
+                    response._fp,
+                    functools.partial(
+                        self.controller.cache_response, request, response
+                    ),
+                )
+                if response.chunked:
+                    super_update_chunk_length = response._update_chunk_length
+
+                    def _update_chunk_length(self):
+                        super_update_chunk_length()
+                        if self.chunk_left == 0:
+                            self._fp._close()
+
+                    response._update_chunk_length = types.MethodType(
+                        _update_chunk_length, response
+                    )
+
+        resp = super(CacheControlAdapter, self).build_response(request, response)
+
+        # See if we should invalidate the cache.
+        if request.method in self.invalidating_methods and resp.ok:
+            cache_url = self.controller.cache_url(request.url)
+            self.cache.delete(cache_url)
+
+        # Give the request a from_cache attr to let people use it
+        resp.from_cache = from_cache
+
+        return resp
+
+    def close(self):
+        self.cache.close()
+        super(CacheControlAdapter, self).close()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/cache.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/cache.py
new file mode 100644
index 0000000..94e0773
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/cache.py
@@ -0,0 +1,39 @@
+"""
+The cache object API for implementing caches. The default is a thread
+safe in-memory dictionary.
+"""
+from threading import Lock
+
+
+class BaseCache(object):
+
+    def get(self, key):
+        raise NotImplementedError()
+
+    def set(self, key, value):
+        raise NotImplementedError()
+
+    def delete(self, key):
+        raise NotImplementedError()
+
+    def close(self):
+        pass
+
+
+class DictCache(BaseCache):
+
+    def __init__(self, init_dict=None):
+        self.lock = Lock()
+        self.data = init_dict or {}
+
+    def get(self, key):
+        return self.data.get(key, None)
+
+    def set(self, key, value):
+        with self.lock:
+            self.data.update({key: value})
+
+    def delete(self, key):
+        with self.lock:
+            if key in self.data:
+                self.data.pop(key)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/__init__.py
new file mode 100644
index 0000000..0e1658f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/__init__.py
@@ -0,0 +1,2 @@
+from .file_cache import FileCache  # noqa
+from .redis_cache import RedisCache  # noqa
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/file_cache.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/file_cache.py
new file mode 100644
index 0000000..607b945
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/file_cache.py
@@ -0,0 +1,146 @@
+import hashlib
+import os
+from textwrap import dedent
+
+from ..cache import BaseCache
+from ..controller import CacheController
+
+try:
+    FileNotFoundError
+except NameError:
+    # py2.X
+    FileNotFoundError = (IOError, OSError)
+
+
+def _secure_open_write(filename, fmode):
+    # We only want to write to this file, so open it in write only mode
+    flags = os.O_WRONLY
+
+    # os.O_CREAT | os.O_EXCL will fail if the file already exists, so we only
+    #  will open *new* files.
+    # We specify this because we want to ensure that the mode we pass is the
+    # mode of the file.
+    flags |= os.O_CREAT | os.O_EXCL
+
+    # Do not follow symlinks to prevent someone from making a symlink that
+    # we follow and insecurely open a cache file.
+    if hasattr(os, "O_NOFOLLOW"):
+        flags |= os.O_NOFOLLOW
+
+    # On Windows we'll mark this file as binary
+    if hasattr(os, "O_BINARY"):
+        flags |= os.O_BINARY
+
+    # Before we open our file, we want to delete any existing file that is
+    # there
+    try:
+        os.remove(filename)
+    except (IOError, OSError):
+        # The file must not exist already, so we can just skip ahead to opening
+        pass
+
+    # Open our file, the use of os.O_CREAT | os.O_EXCL will ensure that if a
+    # race condition happens between the os.remove and this line, that an
+    # error will be raised. Because we utilize a lockfile this should only
+    # happen if someone is attempting to attack us.
+    fd = os.open(filename, flags, fmode)
+    try:
+        return os.fdopen(fd, "wb")
+
+    except:
+        # An error occurred wrapping our FD in a file object
+        os.close(fd)
+        raise
+
+
+class FileCache(BaseCache):
+
+    def __init__(
+        self,
+        directory,
+        forever=False,
+        filemode=0o0600,
+        dirmode=0o0700,
+        use_dir_lock=None,
+        lock_class=None,
+    ):
+
+        if use_dir_lock is not None and lock_class is not None:
+            raise ValueError("Cannot use use_dir_lock and lock_class together")
+
+        try:
+            from lockfile import LockFile
+            from lockfile.mkdirlockfile import MkdirLockFile
+        except ImportError:
+            notice = dedent(
+                """
+            NOTE: In order to use the FileCache you must have
+            lockfile installed. You can install it via pip:
+              pip install lockfile
+            """
+            )
+            raise ImportError(notice)
+
+        else:
+            if use_dir_lock:
+                lock_class = MkdirLockFile
+
+            elif lock_class is None:
+                lock_class = LockFile
+
+        self.directory = directory
+        self.forever = forever
+        self.filemode = filemode
+        self.dirmode = dirmode
+        self.lock_class = lock_class
+
+    @staticmethod
+    def encode(x):
+        return hashlib.sha224(x.encode()).hexdigest()
+
+    def _fn(self, name):
+        # NOTE: This method should not change as some may depend on it.
+        #       See: https://github.com/ionrock/cachecontrol/issues/63
+        hashed = self.encode(name)
+        parts = list(hashed[:5]) + [hashed]
+        return os.path.join(self.directory, *parts)
+
+    def get(self, key):
+        name = self._fn(key)
+        try:
+            with open(name, "rb") as fh:
+                return fh.read()
+
+        except FileNotFoundError:
+            return None
+
+    def set(self, key, value):
+        name = self._fn(key)
+
+        # Make sure the directory exists
+        try:
+            os.makedirs(os.path.dirname(name), self.dirmode)
+        except (IOError, OSError):
+            pass
+
+        with self.lock_class(name) as lock:
+            # Write our actual file
+            with _secure_open_write(lock.path, self.filemode) as fh:
+                fh.write(value)
+
+    def delete(self, key):
+        name = self._fn(key)
+        if not self.forever:
+            try:
+                os.remove(name)
+            except FileNotFoundError:
+                pass
+
+
+def url_to_file_path(url, filecache):
+    """Return the file cache path based on the URL.
+
+    This does not ensure the file exists!
+    """
+    key = CacheController.cache_url(url)
+    return filecache._fn(key)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/redis_cache.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/redis_cache.py
new file mode 100644
index 0000000..ed705ce
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/caches/redis_cache.py
@@ -0,0 +1,33 @@
+from __future__ import division
+
+from datetime import datetime
+from pip._vendor.cachecontrol.cache import BaseCache
+
+
+class RedisCache(BaseCache):
+
+    def __init__(self, conn):
+        self.conn = conn
+
+    def get(self, key):
+        return self.conn.get(key)
+
+    def set(self, key, value, expires=None):
+        if not expires:
+            self.conn.set(key, value)
+        else:
+            expires = expires - datetime.utcnow()
+            self.conn.setex(key, int(expires.total_seconds()), value)
+
+    def delete(self, key):
+        self.conn.delete(key)
+
+    def clear(self):
+        """Helper for clearing all the keys in a database. Use with
+        caution!"""
+        for key in self.conn.keys():
+            self.conn.delete(key)
+
+    def close(self):
+        """Redis uses connection pooling, no need to close the connection."""
+        pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/compat.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/compat.py
new file mode 100644
index 0000000..33b5aed
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/compat.py
@@ -0,0 +1,29 @@
+try:
+    from urllib.parse import urljoin
+except ImportError:
+    from urlparse import urljoin
+
+
+try:
+    import cPickle as pickle
+except ImportError:
+    import pickle
+
+
+# Handle the case where the requests module has been patched to not have
+# urllib3 bundled as part of its source.
+try:
+    from pip._vendor.requests.packages.urllib3.response import HTTPResponse
+except ImportError:
+    from pip._vendor.urllib3.response import HTTPResponse
+
+try:
+    from pip._vendor.requests.packages.urllib3.util import is_fp_closed
+except ImportError:
+    from pip._vendor.urllib3.util import is_fp_closed
+
+# Replicate some six behaviour
+try:
+    text_type = unicode
+except NameError:
+    text_type = str
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/controller.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/controller.py
new file mode 100644
index 0000000..dafe55c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/controller.py
@@ -0,0 +1,376 @@
+"""
+The httplib2 algorithms ported for use with requests.
+"""
+import logging
+import re
+import calendar
+import time
+from email.utils import parsedate_tz
+
+from pip._vendor.requests.structures import CaseInsensitiveDict
+
+from .cache import DictCache
+from .serialize import Serializer
+
+
+logger = logging.getLogger(__name__)
+
+URI = re.compile(r"^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?")
+
+
+def parse_uri(uri):
+    """Parses a URI using the regex given in Appendix B of RFC 3986.
+
+        (scheme, authority, path, query, fragment) = parse_uri(uri)
+    """
+    groups = URI.match(uri).groups()
+    return (groups[1], groups[3], groups[4], groups[6], groups[8])
+
+
+class CacheController(object):
+    """An interface to see if request should cached or not.
+    """
+
+    def __init__(
+        self, cache=None, cache_etags=True, serializer=None, status_codes=None
+    ):
+        self.cache = DictCache() if cache is None else cache
+        self.cache_etags = cache_etags
+        self.serializer = serializer or Serializer()
+        self.cacheable_status_codes = status_codes or (200, 203, 300, 301)
+
+    @classmethod
+    def _urlnorm(cls, uri):
+        """Normalize the URL to create a safe key for the cache"""
+        (scheme, authority, path, query, fragment) = parse_uri(uri)
+        if not scheme or not authority:
+            raise Exception("Only absolute URIs are allowed. uri = %s" % uri)
+
+        scheme = scheme.lower()
+        authority = authority.lower()
+
+        if not path:
+            path = "/"
+
+        # Could do syntax based normalization of the URI before
+        # computing the digest. See Section 6.2.2 of Std 66.
+        request_uri = query and "?".join([path, query]) or path
+        defrag_uri = scheme + "://" + authority + request_uri
+
+        return defrag_uri
+
+    @classmethod
+    def cache_url(cls, uri):
+        return cls._urlnorm(uri)
+
+    def parse_cache_control(self, headers):
+        known_directives = {
+            # https://tools.ietf.org/html/rfc7234#section-5.2
+            "max-age": (int, True),
+            "max-stale": (int, False),
+            "min-fresh": (int, True),
+            "no-cache": (None, False),
+            "no-store": (None, False),
+            "no-transform": (None, False),
+            "only-if-cached": (None, False),
+            "must-revalidate": (None, False),
+            "public": (None, False),
+            "private": (None, False),
+            "proxy-revalidate": (None, False),
+            "s-maxage": (int, True),
+        }
+
+        cc_headers = headers.get("cache-control", headers.get("Cache-Control", ""))
+
+        retval = {}
+
+        for cc_directive in cc_headers.split(","):
+            if not cc_directive.strip():
+                continue
+
+            parts = cc_directive.split("=", 1)
+            directive = parts[0].strip()
+
+            try:
+                typ, required = known_directives[directive]
+            except KeyError:
+                logger.debug("Ignoring unknown cache-control directive: %s", directive)
+                continue
+
+            if not typ or not required:
+                retval[directive] = None
+            if typ:
+                try:
+                    retval[directive] = typ(parts[1].strip())
+                except IndexError:
+                    if required:
+                        logger.debug(
+                            "Missing value for cache-control " "directive: %s",
+                            directive,
+                        )
+                except ValueError:
+                    logger.debug(
+                        "Invalid value for cache-control directive " "%s, must be %s",
+                        directive,
+                        typ.__name__,
+                    )
+
+        return retval
+
+    def cached_request(self, request):
+        """
+        Return a cached response if it exists in the cache, otherwise
+        return False.
+        """
+        cache_url = self.cache_url(request.url)
+        logger.debug('Looking up "%s" in the cache', cache_url)
+        cc = self.parse_cache_control(request.headers)
+
+        # Bail out if the request insists on fresh data
+        if "no-cache" in cc:
+            logger.debug('Request header has "no-cache", cache bypassed')
+            return False
+
+        if "max-age" in cc and cc["max-age"] == 0:
+            logger.debug('Request header has "max_age" as 0, cache bypassed')
+            return False
+
+        # Request allows serving from the cache, let's see if we find something
+        cache_data = self.cache.get(cache_url)
+        if cache_data is None:
+            logger.debug("No cache entry available")
+            return False
+
+        # Check whether it can be deserialized
+        resp = self.serializer.loads(request, cache_data)
+        if not resp:
+            logger.warning("Cache entry deserialization failed, entry ignored")
+            return False
+
+        # If we have a cached 301, return it immediately. We don't
+        # need to test our response for other headers b/c it is
+        # intrinsically "cacheable" as it is Permanent.
+        # See:
+        #   https://tools.ietf.org/html/rfc7231#section-6.4.2
+        #
+        # Client can try to refresh the value by repeating the request
+        # with cache busting headers as usual (ie no-cache).
+        if resp.status == 301:
+            msg = (
+                'Returning cached "301 Moved Permanently" response '
+                "(ignoring date and etag information)"
+            )
+            logger.debug(msg)
+            return resp
+
+        headers = CaseInsensitiveDict(resp.headers)
+        if not headers or "date" not in headers:
+            if "etag" not in headers:
+                # Without date or etag, the cached response can never be used
+                # and should be deleted.
+                logger.debug("Purging cached response: no date or etag")
+                self.cache.delete(cache_url)
+            logger.debug("Ignoring cached response: no date")
+            return False
+
+        now = time.time()
+        date = calendar.timegm(parsedate_tz(headers["date"]))
+        current_age = max(0, now - date)
+        logger.debug("Current age based on date: %i", current_age)
+
+        # TODO: There is an assumption that the result will be a
+        #       urllib3 response object. This may not be best since we
+        #       could probably avoid instantiating or constructing the
+        #       response until we know we need it.
+        resp_cc = self.parse_cache_control(headers)
+
+        # determine freshness
+        freshness_lifetime = 0
+
+        # Check the max-age pragma in the cache control header
+        if "max-age" in resp_cc:
+            freshness_lifetime = resp_cc["max-age"]
+            logger.debug("Freshness lifetime from max-age: %i", freshness_lifetime)
+
+        # If there isn't a max-age, check for an expires header
+        elif "expires" in headers:
+            expires = parsedate_tz(headers["expires"])
+            if expires is not None:
+                expire_time = calendar.timegm(expires) - date
+                freshness_lifetime = max(0, expire_time)
+                logger.debug("Freshness lifetime from expires: %i", freshness_lifetime)
+
+        # Determine if we are setting freshness limit in the
+        # request. Note, this overrides what was in the response.
+        if "max-age" in cc:
+            freshness_lifetime = cc["max-age"]
+            logger.debug(
+                "Freshness lifetime from request max-age: %i", freshness_lifetime
+            )
+
+        if "min-fresh" in cc:
+            min_fresh = cc["min-fresh"]
+            # adjust our current age by our min fresh
+            current_age += min_fresh
+            logger.debug("Adjusted current age from min-fresh: %i", current_age)
+
+        # Return entry if it is fresh enough
+        if freshness_lifetime > current_age:
+            logger.debug('The response is "fresh", returning cached response')
+            logger.debug("%i > %i", freshness_lifetime, current_age)
+            return resp
+
+        # we're not fresh. If we don't have an Etag, clear it out
+        if "etag" not in headers:
+            logger.debug('The cached response is "stale" with no etag, purging')
+            self.cache.delete(cache_url)
+
+        # return the original handler
+        return False
+
+    def conditional_headers(self, request):
+        cache_url = self.cache_url(request.url)
+        resp = self.serializer.loads(request, self.cache.get(cache_url))
+        new_headers = {}
+
+        if resp:
+            headers = CaseInsensitiveDict(resp.headers)
+
+            if "etag" in headers:
+                new_headers["If-None-Match"] = headers["ETag"]
+
+            if "last-modified" in headers:
+                new_headers["If-Modified-Since"] = headers["Last-Modified"]
+
+        return new_headers
+
+    def cache_response(self, request, response, body=None, status_codes=None):
+        """
+        Algorithm for caching requests.
+
+        This assumes a requests Response object.
+        """
+        # From httplib2: Don't cache 206's since we aren't going to
+        #                handle byte range requests
+        cacheable_status_codes = status_codes or self.cacheable_status_codes
+        if response.status not in cacheable_status_codes:
+            logger.debug(
+                "Status code %s not in %s", response.status, cacheable_status_codes
+            )
+            return
+
+        response_headers = CaseInsensitiveDict(response.headers)
+
+        # If we've been given a body, our response has a Content-Length, that
+        # Content-Length is valid then we can check to see if the body we've
+        # been given matches the expected size, and if it doesn't we'll just
+        # skip trying to cache it.
+        if (
+            body is not None
+            and "content-length" in response_headers
+            and response_headers["content-length"].isdigit()
+            and int(response_headers["content-length"]) != len(body)
+        ):
+            return
+
+        cc_req = self.parse_cache_control(request.headers)
+        cc = self.parse_cache_control(response_headers)
+
+        cache_url = self.cache_url(request.url)
+        logger.debug('Updating cache with response from "%s"', cache_url)
+
+        # Delete it from the cache if we happen to have it stored there
+        no_store = False
+        if "no-store" in cc:
+            no_store = True
+            logger.debug('Response header has "no-store"')
+        if "no-store" in cc_req:
+            no_store = True
+            logger.debug('Request header has "no-store"')
+        if no_store and self.cache.get(cache_url):
+            logger.debug('Purging existing cache entry to honor "no-store"')
+            self.cache.delete(cache_url)
+        if no_store:
+            return
+
+        # https://tools.ietf.org/html/rfc7234#section-4.1:
+        # A Vary header field-value of "*" always fails to match.
+        # Storing such a response leads to a deserialization warning
+        # during cache lookup and is not allowed to ever be served,
+        # so storing it can be avoided.
+        if "*" in response_headers.get("vary", ""):
+            logger.debug('Response header has "Vary: *"')
+            return
+
+        # If we've been given an etag, then keep the response
+        if self.cache_etags and "etag" in response_headers:
+            logger.debug("Caching due to etag")
+            self.cache.set(
+                cache_url, self.serializer.dumps(request, response, body=body)
+            )
+
+        # Add to the cache any 301s. We do this before looking that
+        # the Date headers.
+        elif response.status == 301:
+            logger.debug("Caching permanant redirect")
+            self.cache.set(cache_url, self.serializer.dumps(request, response))
+
+        # Add to the cache if the response headers demand it. If there
+        # is no date header then we can't do anything about expiring
+        # the cache.
+        elif "date" in response_headers:
+            # cache when there is a max-age > 0
+            if "max-age" in cc and cc["max-age"] > 0:
+                logger.debug("Caching b/c date exists and max-age > 0")
+                self.cache.set(
+                    cache_url, self.serializer.dumps(request, response, body=body)
+                )
+
+            # If the request can expire, it means we should cache it
+            # in the meantime.
+            elif "expires" in response_headers:
+                if response_headers["expires"]:
+                    logger.debug("Caching b/c of expires header")
+                    self.cache.set(
+                        cache_url, self.serializer.dumps(request, response, body=body)
+                    )
+
+    def update_cached_response(self, request, response):
+        """On a 304 we will get a new set of headers that we want to
+        update our cached value with, assuming we have one.
+
+        This should only ever be called when we've sent an ETag and
+        gotten a 304 as the response.
+        """
+        cache_url = self.cache_url(request.url)
+
+        cached_response = self.serializer.loads(request, self.cache.get(cache_url))
+
+        if not cached_response:
+            # we didn't have a cached response
+            return response
+
+        # Lets update our headers with the headers from the new request:
+        # http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-26#section-4.1
+        #
+        # The server isn't supposed to send headers that would make
+        # the cached body invalid. But... just in case, we'll be sure
+        # to strip out ones we know that might be problmatic due to
+        # typical assumptions.
+        excluded_headers = ["content-length"]
+
+        cached_response.headers.update(
+            dict(
+                (k, v)
+                for k, v in response.headers.items()
+                if k.lower() not in excluded_headers
+            )
+        )
+
+        # we want a 200 b/c we have content via the cache
+        cached_response.status = 200
+
+        # update our cache
+        self.cache.set(cache_url, self.serializer.dumps(request, cached_response))
+
+        return cached_response
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/filewrapper.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/filewrapper.py
new file mode 100644
index 0000000..30ed4c5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/filewrapper.py
@@ -0,0 +1,80 @@
+from io import BytesIO
+
+
+class CallbackFileWrapper(object):
+    """
+    Small wrapper around a fp object which will tee everything read into a
+    buffer, and when that file is closed it will execute a callback with the
+    contents of that buffer.
+
+    All attributes are proxied to the underlying file object.
+
+    This class uses members with a double underscore (__) leading prefix so as
+    not to accidentally shadow an attribute.
+    """
+
+    def __init__(self, fp, callback):
+        self.__buf = BytesIO()
+        self.__fp = fp
+        self.__callback = callback
+
+    def __getattr__(self, name):
+        # The vaguaries of garbage collection means that self.__fp is
+        # not always set.  By using __getattribute__ and the private
+        # name[0] allows looking up the attribute value and raising an
+        # AttributeError when it doesn't exist. This stop thigns from
+        # infinitely recursing calls to getattr in the case where
+        # self.__fp hasn't been set.
+        #
+        # [0] https://docs.python.org/2/reference/expressions.html#atom-identifiers
+        fp = self.__getattribute__("_CallbackFileWrapper__fp")
+        return getattr(fp, name)
+
+    def __is_fp_closed(self):
+        try:
+            return self.__fp.fp is None
+
+        except AttributeError:
+            pass
+
+        try:
+            return self.__fp.closed
+
+        except AttributeError:
+            pass
+
+        # We just don't cache it then.
+        # TODO: Add some logging here...
+        return False
+
+    def _close(self):
+        if self.__callback:
+            self.__callback(self.__buf.getvalue())
+
+        # We assign this to None here, because otherwise we can get into
+        # really tricky problems where the CPython interpreter dead locks
+        # because the callback is holding a reference to something which
+        # has a __del__ method. Setting this to None breaks the cycle
+        # and allows the garbage collector to do it's thing normally.
+        self.__callback = None
+
+    def read(self, amt=None):
+        data = self.__fp.read(amt)
+        self.__buf.write(data)
+        if self.__is_fp_closed():
+            self._close()
+
+        return data
+
+    def _safe_read(self, amt):
+        data = self.__fp._safe_read(amt)
+        if amt == 2 and data == b"\r\n":
+            # urllib executes this read to toss the CRLF at the end
+            # of the chunk.
+            return data
+
+        self.__buf.write(data)
+        if self.__is_fp_closed():
+            self._close()
+
+        return data
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/heuristics.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/heuristics.py
new file mode 100644
index 0000000..6c0e979
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/heuristics.py
@@ -0,0 +1,135 @@
+import calendar
+import time
+
+from email.utils import formatdate, parsedate, parsedate_tz
+
+from datetime import datetime, timedelta
+
+TIME_FMT = "%a, %d %b %Y %H:%M:%S GMT"
+
+
+def expire_after(delta, date=None):
+    date = date or datetime.utcnow()
+    return date + delta
+
+
+def datetime_to_header(dt):
+    return formatdate(calendar.timegm(dt.timetuple()))
+
+
+class BaseHeuristic(object):
+
+    def warning(self, response):
+        """
+        Return a valid 1xx warning header value describing the cache
+        adjustments.
+
+        The response is provided too allow warnings like 113
+        http://tools.ietf.org/html/rfc7234#section-5.5.4 where we need
+        to explicitly say response is over 24 hours old.
+        """
+        return '110 - "Response is Stale"'
+
+    def update_headers(self, response):
+        """Update the response headers with any new headers.
+
+        NOTE: This SHOULD always include some Warning header to
+              signify that the response was cached by the client, not
+              by way of the provided headers.
+        """
+        return {}
+
+    def apply(self, response):
+        updated_headers = self.update_headers(response)
+
+        if updated_headers:
+            response.headers.update(updated_headers)
+            warning_header_value = self.warning(response)
+            if warning_header_value is not None:
+                response.headers.update({"Warning": warning_header_value})
+
+        return response
+
+
+class OneDayCache(BaseHeuristic):
+    """
+    Cache the response by providing an expires 1 day in the
+    future.
+    """
+
+    def update_headers(self, response):
+        headers = {}
+
+        if "expires" not in response.headers:
+            date = parsedate(response.headers["date"])
+            expires = expire_after(timedelta(days=1), date=datetime(*date[:6]))
+            headers["expires"] = datetime_to_header(expires)
+            headers["cache-control"] = "public"
+        return headers
+
+
+class ExpiresAfter(BaseHeuristic):
+    """
+    Cache **all** requests for a defined time period.
+    """
+
+    def __init__(self, **kw):
+        self.delta = timedelta(**kw)
+
+    def update_headers(self, response):
+        expires = expire_after(self.delta)
+        return {"expires": datetime_to_header(expires), "cache-control": "public"}
+
+    def warning(self, response):
+        tmpl = "110 - Automatically cached for %s. Response might be stale"
+        return tmpl % self.delta
+
+
+class LastModified(BaseHeuristic):
+    """
+    If there is no Expires header already, fall back on Last-Modified
+    using the heuristic from
+    http://tools.ietf.org/html/rfc7234#section-4.2.2
+    to calculate a reasonable value.
+
+    Firefox also does something like this per
+    https://developer.mozilla.org/en-US/docs/Web/HTTP/Caching_FAQ
+    http://lxr.mozilla.org/mozilla-release/source/netwerk/protocol/http/nsHttpResponseHead.cpp#397
+    Unlike mozilla we limit this to 24-hr.
+    """
+    cacheable_by_default_statuses = {
+        200, 203, 204, 206, 300, 301, 404, 405, 410, 414, 501
+    }
+
+    def update_headers(self, resp):
+        headers = resp.headers
+
+        if "expires" in headers:
+            return {}
+
+        if "cache-control" in headers and headers["cache-control"] != "public":
+            return {}
+
+        if resp.status not in self.cacheable_by_default_statuses:
+            return {}
+
+        if "date" not in headers or "last-modified" not in headers:
+            return {}
+
+        date = calendar.timegm(parsedate_tz(headers["date"]))
+        last_modified = parsedate(headers["last-modified"])
+        if date is None or last_modified is None:
+            return {}
+
+        now = time.time()
+        current_age = max(0, now - date)
+        delta = date - calendar.timegm(last_modified)
+        freshness_lifetime = max(0, min(delta / 10, 24 * 3600))
+        if freshness_lifetime <= current_age:
+            return {}
+
+        expires = date + freshness_lifetime
+        return {"expires": time.strftime(TIME_FMT, time.gmtime(expires))}
+
+    def warning(self, resp):
+        return None
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/serialize.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/serialize.py
new file mode 100644
index 0000000..3b6ec2d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/serialize.py
@@ -0,0 +1,188 @@
+import base64
+import io
+import json
+import zlib
+
+from pip._vendor import msgpack
+from pip._vendor.requests.structures import CaseInsensitiveDict
+
+from .compat import HTTPResponse, pickle, text_type
+
+
+def _b64_decode_bytes(b):
+    return base64.b64decode(b.encode("ascii"))
+
+
+def _b64_decode_str(s):
+    return _b64_decode_bytes(s).decode("utf8")
+
+
+class Serializer(object):
+
+    def dumps(self, request, response, body=None):
+        response_headers = CaseInsensitiveDict(response.headers)
+
+        if body is None:
+            body = response.read(decode_content=False)
+
+            # NOTE: 99% sure this is dead code. I'm only leaving it
+            #       here b/c I don't have a test yet to prove
+            #       it. Basically, before using
+            #       `cachecontrol.filewrapper.CallbackFileWrapper`,
+            #       this made an effort to reset the file handle. The
+            #       `CallbackFileWrapper` short circuits this code by
+            #       setting the body as the content is consumed, the
+            #       result being a `body` argument is *always* passed
+            #       into cache_response, and in turn,
+            #       `Serializer.dump`.
+            response._fp = io.BytesIO(body)
+
+        # NOTE: This is all a bit weird, but it's really important that on
+        #       Python 2.x these objects are unicode and not str, even when
+        #       they contain only ascii. The problem here is that msgpack
+        #       understands the difference between unicode and bytes and we
+        #       have it set to differentiate between them, however Python 2
+        #       doesn't know the difference. Forcing these to unicode will be
+        #       enough to have msgpack know the difference.
+        data = {
+            u"response": {
+                u"body": body,
+                u"headers": dict(
+                    (text_type(k), text_type(v)) for k, v in response.headers.items()
+                ),
+                u"status": response.status,
+                u"version": response.version,
+                u"reason": text_type(response.reason),
+                u"strict": response.strict,
+                u"decode_content": response.decode_content,
+            }
+        }
+
+        # Construct our vary headers
+        data[u"vary"] = {}
+        if u"vary" in response_headers:
+            varied_headers = response_headers[u"vary"].split(",")
+            for header in varied_headers:
+                header = text_type(header).strip()
+                header_value = request.headers.get(header, None)
+                if header_value is not None:
+                    header_value = text_type(header_value)
+                data[u"vary"][header] = header_value
+
+        return b",".join([b"cc=4", msgpack.dumps(data, use_bin_type=True)])
+
+    def loads(self, request, data):
+        # Short circuit if we've been given an empty set of data
+        if not data:
+            return
+
+        # Determine what version of the serializer the data was serialized
+        # with
+        try:
+            ver, data = data.split(b",", 1)
+        except ValueError:
+            ver = b"cc=0"
+
+        # Make sure that our "ver" is actually a version and isn't a false
+        # positive from a , being in the data stream.
+        if ver[:3] != b"cc=":
+            data = ver + data
+            ver = b"cc=0"
+
+        # Get the version number out of the cc=N
+        ver = ver.split(b"=", 1)[-1].decode("ascii")
+
+        # Dispatch to the actual load method for the given version
+        try:
+            return getattr(self, "_loads_v{}".format(ver))(request, data)
+
+        except AttributeError:
+            # This is a version we don't have a loads function for, so we'll
+            # just treat it as a miss and return None
+            return
+
+    def prepare_response(self, request, cached):
+        """Verify our vary headers match and construct a real urllib3
+        HTTPResponse object.
+        """
+        # Special case the '*' Vary value as it means we cannot actually
+        # determine if the cached response is suitable for this request.
+        # This case is also handled in the controller code when creating
+        # a cache entry, but is left here for backwards compatibility.
+        if "*" in cached.get("vary", {}):
+            return
+
+        # Ensure that the Vary headers for the cached response match our
+        # request
+        for header, value in cached.get("vary", {}).items():
+            if request.headers.get(header, None) != value:
+                return
+
+        body_raw = cached["response"].pop("body")
+
+        headers = CaseInsensitiveDict(data=cached["response"]["headers"])
+        if headers.get("transfer-encoding", "") == "chunked":
+            headers.pop("transfer-encoding")
+
+        cached["response"]["headers"] = headers
+
+        try:
+            body = io.BytesIO(body_raw)
+        except TypeError:
+            # This can happen if cachecontrol serialized to v1 format (pickle)
+            # using Python 2. A Python 2 str(byte string) will be unpickled as
+            # a Python 3 str (unicode string), which will cause the above to
+            # fail with:
+            #
+            #     TypeError: 'str' does not support the buffer interface
+            body = io.BytesIO(body_raw.encode("utf8"))
+
+        return HTTPResponse(body=body, preload_content=False, **cached["response"])
+
+    def _loads_v0(self, request, data):
+        # The original legacy cache data. This doesn't contain enough
+        # information to construct everything we need, so we'll treat this as
+        # a miss.
+        return
+
+    def _loads_v1(self, request, data):
+        try:
+            cached = pickle.loads(data)
+        except ValueError:
+            return
+
+        return self.prepare_response(request, cached)
+
+    def _loads_v2(self, request, data):
+        try:
+            cached = json.loads(zlib.decompress(data).decode("utf8"))
+        except (ValueError, zlib.error):
+            return
+
+        # We need to decode the items that we've base64 encoded
+        cached["response"]["body"] = _b64_decode_bytes(cached["response"]["body"])
+        cached["response"]["headers"] = dict(
+            (_b64_decode_str(k), _b64_decode_str(v))
+            for k, v in cached["response"]["headers"].items()
+        )
+        cached["response"]["reason"] = _b64_decode_str(cached["response"]["reason"])
+        cached["vary"] = dict(
+            (_b64_decode_str(k), _b64_decode_str(v) if v is not None else v)
+            for k, v in cached["vary"].items()
+        )
+
+        return self.prepare_response(request, cached)
+
+    def _loads_v3(self, request, data):
+        # Due to Python 2 encoding issues, it's impossible to know for sure
+        # exactly how to load v3 entries, thus we'll treat these as a miss so
+        # that they get rewritten out as v4 entries.
+        return
+
+    def _loads_v4(self, request, data):
+        try:
+            cached = msgpack.loads(data, raw=False)
+        except ValueError:
+            return
+
+        return self.prepare_response(request, cached)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/wrapper.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/wrapper.py
new file mode 100644
index 0000000..d8e6fc6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/cachecontrol/wrapper.py
@@ -0,0 +1,29 @@
+from .adapter import CacheControlAdapter
+from .cache import DictCache
+
+
+def CacheControl(
+    sess,
+    cache=None,
+    cache_etags=True,
+    serializer=None,
+    heuristic=None,
+    controller_class=None,
+    adapter_class=None,
+    cacheable_methods=None,
+):
+
+    cache = DictCache() if cache is None else cache
+    adapter_class = adapter_class or CacheControlAdapter
+    adapter = adapter_class(
+        cache,
+        cache_etags=cache_etags,
+        serializer=serializer,
+        heuristic=heuristic,
+        controller_class=controller_class,
+        cacheable_methods=cacheable_methods,
+    )
+    sess.mount("http://", adapter)
+    sess.mount("https://", adapter)
+
+    return sess
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__init__.py
new file mode 100644
index 0000000..5d52a62
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__init__.py
@@ -0,0 +1,3 @@
+from .core import contents, where
+
+__version__ = "2020.06.20"
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__main__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__main__.py
new file mode 100644
index 0000000..0037634
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__main__.py
@@ -0,0 +1,12 @@
+import argparse
+
+from pip._vendor.certifi import contents, where
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-c", "--contents", action="store_true")
+args = parser.parse_args()
+
+if args.contents:
+    print(contents())
+else:
+    print(where())
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..39100c1
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__pycache__/__init__.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__pycache__/__main__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__pycache__/__main__.cpython-38.pyc
new file mode 100644
index 0000000..2fc7c05
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__pycache__/__main__.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__pycache__/core.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__pycache__/core.cpython-38.pyc
new file mode 100644
index 0000000..b7737f3
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/__pycache__/core.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/cacert.pem b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/cacert.pem
new file mode 100644
index 0000000..0fd855f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/cacert.pem
@@ -0,0 +1,4620 @@
+
+# Issuer: CN=GlobalSign Root CA O=GlobalSign nv-sa OU=Root CA
+# Subject: CN=GlobalSign Root CA O=GlobalSign nv-sa OU=Root CA
+# Label: "GlobalSign Root CA"
+# Serial: 4835703278459707669005204
+# MD5 Fingerprint: 3e:45:52:15:09:51:92:e1:b7:5d:37:9f:b1:87:29:8a
+# SHA1 Fingerprint: b1:bc:96:8b:d4:f4:9d:62:2a:a8:9a:81:f2:15:01:52:a4:1d:82:9c
+# SHA256 Fingerprint: eb:d4:10:40:e4:bb:3e:c7:42:c9:e3:81:d3:1e:f2:a4:1a:48:b6:68:5c:96:e7:ce:f3:c1:df:6c:d4:33:1c:99
+-----BEGIN CERTIFICATE-----
+MIIDdTCCAl2gAwIBAgILBAAAAAABFUtaw5QwDQYJKoZIhvcNAQEFBQAwVzELMAkG
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R2
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R2
+# Label: "GlobalSign Root CA - R2"
+# Serial: 4835703278459682885658125
+# MD5 Fingerprint: 94:14:77:7e:3e:5e:fd:8f:30:bd:41:b0:cf:e7:d0:30
+# SHA1 Fingerprint: 75:e0:ab:b6:13:85:12:27:1c:04:f8:5f:dd:de:38:e4:b7:24:2e:fe
+# SHA256 Fingerprint: ca:42:dd:41:74:5f:d0:b8:1e:b9:02:36:2c:f9:d8:bf:71:9d:a1:bd:1b:1e:fc:94:6f:5b:4c:99:f4:2c:1b:9e
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Entrust.net Certification Authority (2048) O=Entrust.net OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)/(c) 1999 Entrust.net Limited
+# Subject: CN=Entrust.net Certification Authority (2048) O=Entrust.net OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)/(c) 1999 Entrust.net Limited
+# Label: "Entrust.net Premium 2048 Secure Server CA"
+# Serial: 946069240
+# MD5 Fingerprint: ee:29:31:bc:32:7e:9a:e6:e8:b5:f7:51:b4:34:71:90
+# SHA1 Fingerprint: 50:30:06:09:1d:97:d4:f5:ae:39:f7:cb:e7:92:7d:7d:65:2d:34:31
+# SHA256 Fingerprint: 6d:c4:71:72:e0:1c:bc:b0:bf:62:58:0d:89:5f:e2:b8:ac:9a:d4:f8:73:80:1e:0c:10:b9:c8:37:d2:1e:b1:77
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Baltimore CyberTrust Root O=Baltimore OU=CyberTrust
+# Subject: CN=Baltimore CyberTrust Root O=Baltimore OU=CyberTrust
+# Label: "Baltimore CyberTrust Root"
+# Serial: 33554617
+# MD5 Fingerprint: ac:b6:94:a5:9c:17:e0:d7:91:52:9b:b1:97:06:a6:e4
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Entrust Root Certification Authority O=Entrust, Inc. OU=www.entrust.net/CPS is incorporated by reference/(c) 2006 Entrust, Inc.
+# Subject: CN=Entrust Root Certification Authority O=Entrust, Inc. OU=www.entrust.net/CPS is incorporated by reference/(c) 2006 Entrust, Inc.
+# Label: "Entrust Root Certification Authority"
+# Serial: 1164660820
+# MD5 Fingerprint: d6:a5:c3:ed:5d:dd:3e:00:c1:3d:87:92:1f:1d:3f:e4
+# SHA1 Fingerprint: b3:1e:b1:b7:40:e3:6c:84:02:da:dc:37:d4:4d:f5:d4:67:49:52:f9
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+-----BEGIN CERTIFICATE-----
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+# Label: "GeoTrust Global CA"
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+# Issuer: CN=GeoTrust Universal CA 2 O=GeoTrust Inc.
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+# Label: "GeoTrust Universal CA 2"
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+# Issuer: CN=AAA Certificate Services O=Comodo CA Limited
+# Subject: CN=AAA Certificate Services O=Comodo CA Limited
+# Label: "Comodo AAA Services root"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=QuoVadis Root Certification Authority O=QuoVadis Limited OU=Root Certification Authority
+# Label: "QuoVadis Root CA"
+# Serial: 985026699
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=QuoVadis Root CA 2 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 2 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 2"
+# Serial: 1289
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=QuoVadis Root CA 3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 3"
+# Serial: 1478
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+-----BEGIN CERTIFICATE-----
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+# Issuer: O=SECOM Trust.net OU=Security Communication RootCA1
+# Subject: O=SECOM Trust.net OU=Security Communication RootCA1
+# Label: "Security Communication Root CA"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=Sonera Class2 CA O=Sonera
+# Subject: CN=Sonera Class2 CA O=Sonera
+# Label: "Sonera Class 2 Root CA"
+# Serial: 29
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=XRamp Global Certification Authority O=XRamp Security Services Inc OU=www.xrampsecurity.com
+# Subject: CN=XRamp Global Certification Authority O=XRamp Security Services Inc OU=www.xrampsecurity.com
+# Label: "XRamp Global CA Root"
+# Serial: 107108908803651509692980124233745014957
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+-----BEGIN CERTIFICATE-----
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+# Issuer: O=The Go Daddy Group, Inc. OU=Go Daddy Class 2 Certification Authority
+# Subject: O=The Go Daddy Group, Inc. OU=Go Daddy Class 2 Certification Authority
+# Label: "Go Daddy Class 2 CA"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+# Issuer: O=Starfield Technologies, Inc. OU=Starfield Class 2 Certification Authority
+# Subject: O=Starfield Technologies, Inc. OU=Starfield Class 2 Certification Authority
+# Label: "Starfield Class 2 CA"
+# Serial: 0
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+# Issuer: O=Government Root Certification Authority
+# Subject: O=Government Root Certification Authority
+# Label: "Taiwan GRCA"
+# Serial: 42023070807708724159991140556527066870
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=DigiCert Assured ID Root CA O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Assured ID Root CA O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Assured ID Root CA"
+# Serial: 17154717934120587862167794914071425081
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=DigiCert Global Root CA O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Global Root CA O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Global Root CA"
+# Serial: 10944719598952040374951832963794454346
+# MD5 Fingerprint: 79:e4:a9:84:0d:7d:3a:96:d7:c0:4f:e2:43:4c:89:2e
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=DigiCert High Assurance EV Root CA O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert High Assurance EV Root CA O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert High Assurance EV Root CA"
+# Serial: 3553400076410547919724730734378100087
+# MD5 Fingerprint: d4:74:de:57:5c:39:b2:d3:9c:85:83:c5:c0:65:49:8a
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=DST Root CA X3 O=Digital Signature Trust Co.
+# Subject: CN=DST Root CA X3 O=Digital Signature Trust Co.
+# Label: "DST Root CA X3"
+# Serial: 91299735575339953335919266965803778155
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=SwissSign Gold CA - G2 O=SwissSign AG
+# Subject: CN=SwissSign Gold CA - G2 O=SwissSign AG
+# Label: "SwissSign Gold CA - G2"
+# Serial: 13492815561806991280
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=SwissSign Silver CA - G2 O=SwissSign AG
+# Subject: CN=SwissSign Silver CA - G2 O=SwissSign AG
+# Label: "SwissSign Silver CA - G2"
+# Serial: 5700383053117599563
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=GeoTrust Primary Certification Authority O=GeoTrust Inc.
+# Subject: CN=GeoTrust Primary Certification Authority O=GeoTrust Inc.
+# Label: "GeoTrust Primary Certification Authority"
+# Serial: 32798226551256963324313806436981982369
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=thawte Primary Root CA O=thawte, Inc. OU=Certification Services Division/(c) 2006 thawte, Inc. - For authorized use only
+# Subject: CN=thawte Primary Root CA O=thawte, Inc. OU=Certification Services Division/(c) 2006 thawte, Inc. - For authorized use only
+# Label: "thawte Primary Root CA"
+# Serial: 69529181992039203566298953787712940909
+# MD5 Fingerprint: 8c:ca:dc:0b:22:ce:f5:be:72:ac:41:1a:11:a8:d8:12
+# SHA1 Fingerprint: 91:c6:d6:ee:3e:8a:c8:63:84:e5:48:c2:99:29:5c:75:6c:81:7b:81
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=VeriSign Class 3 Public Primary Certification Authority - G5 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2006 VeriSign, Inc. - For authorized use only
+# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G5 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2006 VeriSign, Inc. - For authorized use only
+# Label: "VeriSign Class 3 Public Primary Certification Authority - G5"
+# Serial: 33037644167568058970164719475676101450
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SecureTrust CA O=SecureTrust Corporation
+# Subject: CN=SecureTrust CA O=SecureTrust Corporation
+# Label: "SecureTrust CA"
+# Serial: 17199774589125277788362757014266862032
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=Secure Global CA O=SecureTrust Corporation
+# Subject: CN=Secure Global CA O=SecureTrust Corporation
+# Label: "Secure Global CA"
+# Serial: 9751836167731051554232119481456978597
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=COMODO Certification Authority O=COMODO CA Limited
+# Subject: CN=COMODO Certification Authority O=COMODO CA Limited
+# Label: "COMODO Certification Authority"
+# Serial: 104350513648249232941998508985834464573
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=Network Solutions Certificate Authority O=Network Solutions L.L.C.
+# Subject: CN=Network Solutions Certificate Authority O=Network Solutions L.L.C.
+# Label: "Network Solutions Certificate Authority"
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=COMODO ECC Certification Authority O=COMODO CA Limited
+# Subject: CN=COMODO ECC Certification Authority O=COMODO CA Limited
+# Label: "COMODO ECC Certification Authority"
+# Serial: 41578283867086692638256921589707938090
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=OISTE WISeKey Global Root GA CA O=WISeKey OU=Copyright (c) 2005/OISTE Foundation Endorsed
+# Subject: CN=OISTE WISeKey Global Root GA CA O=WISeKey OU=Copyright (c) 2005/OISTE Foundation Endorsed
+# Label: "OISTE WISeKey Global Root GA CA"
+# Serial: 86718877871133159090080555911823548314
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Certigna O=Dhimyotis
+# Subject: CN=Certigna O=Dhimyotis
+# Label: "Certigna"
+# Serial: 18364802974209362175
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Cybertrust Global Root O=Cybertrust, Inc
+# Subject: CN=Cybertrust Global Root O=Cybertrust, Inc
+# Label: "Cybertrust Global Root"
+# Serial: 4835703278459682877484360
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=Chunghwa Telecom Co., Ltd. OU=ePKI Root Certification Authority
+# Subject: O=Chunghwa Telecom Co., Ltd. OU=ePKI Root Certification Authority
+# Label: "ePKI Root Certification Authority"
+# Serial: 28956088682735189655030529057352760477
+# MD5 Fingerprint: 1b:2e:00:ca:26:06:90:3d:ad:fe:6f:15:68:d3:6b:b3
+# SHA1 Fingerprint: 67:65:0d:f1:7e:8e:7e:5b:82:40:a4:f4:56:4b:cf:e2:3d:69:c6:f0
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=certSIGN OU=certSIGN ROOT CA
+# Subject: O=certSIGN OU=certSIGN ROOT CA
+# Label: "certSIGN ROOT CA"
+# Serial: 35210227249154
+# MD5 Fingerprint: 18:98:c0:d6:e9:3a:fc:f9:b0:f5:0c:f7:4b:01:44:17
+# SHA1 Fingerprint: fa:b7:ee:36:97:26:62:fb:2d:b0:2a:f6:bf:03:fd:e8:7c:4b:2f:9b
+# SHA256 Fingerprint: ea:a9:62:c4:fa:4a:6b:af:eb:e4:15:19:6d:35:1c:cd:88:8d:4f:53:f3:fa:8a:e6:d7:c4:66:a9:4e:60:42:bb
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GeoTrust Primary Certification Authority - G3 O=GeoTrust Inc. OU=(c) 2008 GeoTrust Inc. - For authorized use only
+# Subject: CN=GeoTrust Primary Certification Authority - G3 O=GeoTrust Inc. OU=(c) 2008 GeoTrust Inc. - For authorized use only
+# Label: "GeoTrust Primary Certification Authority - G3"
+# Serial: 28809105769928564313984085209975885599
+# MD5 Fingerprint: b5:e8:34:36:c9:10:44:58:48:70:6d:2e:83:d4:b8:05
+# SHA1 Fingerprint: 03:9e:ed:b8:0b:e7:a0:3c:69:53:89:3b:20:d2:d9:32:3a:4c:2a:fd
+# SHA256 Fingerprint: b4:78:b8:12:25:0d:f8:78:63:5c:2a:a7:ec:7d:15:5e:aa:62:5e:e8:29:16:e2:cd:29:43:61:88:6c:d1:fb:d4
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=thawte Primary Root CA - G2 O=thawte, Inc. OU=(c) 2007 thawte, Inc. - For authorized use only
+# Subject: CN=thawte Primary Root CA - G2 O=thawte, Inc. OU=(c) 2007 thawte, Inc. - For authorized use only
+# Label: "thawte Primary Root CA - G2"
+# Serial: 71758320672825410020661621085256472406
+# MD5 Fingerprint: 74:9d:ea:60:24:c4:fd:22:53:3e:cc:3a:72:d9:29:4f
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=thawte Primary Root CA - G3 O=thawte, Inc. OU=Certification Services Division/(c) 2008 thawte, Inc. - For authorized use only
+# Subject: CN=thawte Primary Root CA - G3 O=thawte, Inc. OU=Certification Services Division/(c) 2008 thawte, Inc. - For authorized use only
+# Label: "thawte Primary Root CA - G3"
+# Serial: 127614157056681299805556476275995414779
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GeoTrust Primary Certification Authority - G2 O=GeoTrust Inc. OU=(c) 2007 GeoTrust Inc. - For authorized use only
+# Subject: CN=GeoTrust Primary Certification Authority - G2 O=GeoTrust Inc. OU=(c) 2007 GeoTrust Inc. - For authorized use only
+# Label: "GeoTrust Primary Certification Authority - G2"
+# Serial: 80682863203381065782177908751794619243
+# MD5 Fingerprint: 01:5e:d8:6b:bd:6f:3d:8e:a1:31:f8:12:e0:98:73:6a
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=VeriSign Universal Root Certification Authority O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2008 VeriSign, Inc. - For authorized use only
+# Subject: CN=VeriSign Universal Root Certification Authority O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2008 VeriSign, Inc. - For authorized use only
+# Label: "VeriSign Universal Root Certification Authority"
+# Serial: 85209574734084581917763752644031726877
+# MD5 Fingerprint: 8e:ad:b5:01:aa:4d:81:e4:8c:1d:d1:e1:14:00:95:19
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=VeriSign Class 3 Public Primary Certification Authority - G4 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2007 VeriSign, Inc. - For authorized use only
+# Subject: CN=VeriSign Class 3 Public Primary Certification Authority - G4 O=VeriSign, Inc. OU=VeriSign Trust Network/(c) 2007 VeriSign, Inc. - For authorized use only
+# Label: "VeriSign Class 3 Public Primary Certification Authority - G4"
+# Serial: 63143484348153506665311985501458640051
+# MD5 Fingerprint: 3a:52:e1:e7:fd:6f:3a:e3:6f:f3:6f:99:1b:f9:22:41
+# SHA1 Fingerprint: 22:d5:d8:df:8f:02:31:d1:8d:f7:9d:b7:cf:8a:2d:64:c9:3f:6c:3a
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny O=NetLock Kft. OU=Tan\xfas\xedtv\xe1nykiad\xf3k (Certification Services)
+# Subject: CN=NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny O=NetLock Kft. OU=Tan\xfas\xedtv\xe1nykiad\xf3k (Certification Services)
+# Label: "NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny"
+# Serial: 80544274841616
+# MD5 Fingerprint: c5:a1:b7:ff:73:dd:d6:d7:34:32:18:df:fc:3c:ad:88
+# SHA1 Fingerprint: 06:08:3f:59:3f:15:a1:04:a0:69:a4:6b:a9:03:d0:06:b7:97:09:91
+# SHA256 Fingerprint: 6c:61:da:c3:a2:de:f0:31:50:6b:e0:36:d2:a6:fe:40:19:94:fb:d1:3d:f9:c8:d4:66:59:92:74:c4:46:ec:98
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Hongkong Post Root CA 1 O=Hongkong Post
+# Subject: CN=Hongkong Post Root CA 1 O=Hongkong Post
+# Label: "Hongkong Post Root CA 1"
+# Serial: 1000
+# MD5 Fingerprint: a8:0d:6f:39:78:b9:43:6d:77:42:6d:98:5a:cc:23:ca
+# SHA1 Fingerprint: d6:da:a8:20:8d:09:d2:15:4d:24:b5:2f:cb:34:6e:b2:58:b2:8a:58
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=SecureSign RootCA11 O=Japan Certification Services, Inc.
+# Subject: CN=SecureSign RootCA11 O=Japan Certification Services, Inc.
+# Label: "SecureSign RootCA11"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Microsec e-Szigno Root CA 2009 O=Microsec Ltd.
+# Subject: CN=Microsec e-Szigno Root CA 2009 O=Microsec Ltd.
+# Label: "Microsec e-Szigno Root CA 2009"
+# Serial: 14014712776195784473
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R3
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R3
+# Label: "GlobalSign Root CA - R3"
+# Serial: 4835703278459759426209954
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Autoridad de Certificacion Firmaprofesional CIF A62634068
+# Subject: CN=Autoridad de Certificacion Firmaprofesional CIF A62634068
+# Label: "Autoridad de Certificacion Firmaprofesional CIF A62634068"
+# Serial: 6047274297262753887
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Izenpe.com O=IZENPE S.A.
+# Subject: CN=Izenpe.com O=IZENPE S.A.
+# Label: "Izenpe.com"
+# Serial: 917563065490389241595536686991402621
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Chambers of Commerce Root - 2008 O=AC Camerfirma S.A.
+# Subject: CN=Chambers of Commerce Root - 2008 O=AC Camerfirma S.A.
+# Label: "Chambers of Commerce Root - 2008"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Global Chambersign Root - 2008 O=AC Camerfirma S.A.
+# Subject: CN=Global Chambersign Root - 2008 O=AC Camerfirma S.A.
+# Label: "Global Chambersign Root - 2008"
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=Go Daddy Root Certificate Authority - G2 O=GoDaddy.com, Inc.
+# Label: "Go Daddy Root Certificate Authority - G2"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Starfield Root Certificate Authority - G2 O=Starfield Technologies, Inc.
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+# Label: "Starfield Root Certificate Authority - G2"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=Starfield Services Root Certificate Authority - G2 O=Starfield Technologies, Inc.
+# Label: "Starfield Services Root Certificate Authority - G2"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=AffirmTrust Commercial O=AffirmTrust
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+# Label: "AffirmTrust Commercial"
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+# Label: "AffirmTrust Networking"
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+# Label: "AffirmTrust Premium"
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+# Issuer: CN=AffirmTrust Premium ECC O=AffirmTrust
+# Subject: CN=AffirmTrust Premium ECC O=AffirmTrust
+# Label: "AffirmTrust Premium ECC"
+# Serial: 8401224907861490260
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Certum Trusted Network CA O=Unizeto Technologies S.A. OU=Certum Certification Authority
+# Subject: CN=Certum Trusted Network CA O=Unizeto Technologies S.A. OU=Certum Certification Authority
+# Label: "Certum Trusted Network CA"
+# Serial: 279744
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=TWCA Root Certification Authority O=TAIWAN-CA OU=Root CA
+# Subject: CN=TWCA Root Certification Authority O=TAIWAN-CA OU=Root CA
+# Label: "TWCA Root Certification Authority"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=SECOM Trust Systems CO.,LTD. OU=Security Communication RootCA2
+# Subject: O=SECOM Trust Systems CO.,LTD. OU=Security Communication RootCA2
+# Label: "Security Communication RootCA2"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=EC-ACC O=Agencia Catalana de Certificacio (NIF Q-0801176-I) OU=Serveis Publics de Certificacio/Vegeu https://www.catcert.net/verarrel (c)03/Jerarquia Entitats de Certificacio Catalanes
+# Subject: CN=EC-ACC O=Agencia Catalana de Certificacio (NIF Q-0801176-I) OU=Serveis Publics de Certificacio/Vegeu https://www.catcert.net/verarrel (c)03/Jerarquia Entitats de Certificacio Catalanes
+# Label: "EC-ACC"
+# Serial: -23701579247955709139626555126524820479
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Hellenic Academic and Research Institutions RootCA 2011 O=Hellenic Academic and Research Institutions Cert. Authority
+# Subject: CN=Hellenic Academic and Research Institutions RootCA 2011 O=Hellenic Academic and Research Institutions Cert. Authority
+# Label: "Hellenic Academic and Research Institutions RootCA 2011"
+# Serial: 0
+# MD5 Fingerprint: 73:9f:4c:4b:73:5b:79:e9:fa:ba:1c:ef:6e:cb:d5:c9
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Actalis Authentication Root CA O=Actalis S.p.A./03358520967
+# Subject: CN=Actalis Authentication Root CA O=Actalis S.p.A./03358520967
+# Label: "Actalis Authentication Root CA"
+# Serial: 6271844772424770508
+# MD5 Fingerprint: 69:c1:0d:4f:07:a3:1b:c3:fe:56:3d:04:bc:11:f6:a6
+# SHA1 Fingerprint: f3:73:b3:87:06:5a:28:84:8a:f2:f3:4a:ce:19:2b:dd:c7:8e:9c:ac
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: O=Trustis Limited OU=Trustis FPS Root CA
+# Subject: O=Trustis Limited OU=Trustis FPS Root CA
+# Label: "Trustis FPS Root CA"
+# Serial: 36053640375399034304724988975563710553
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Buypass Class 2 Root CA O=Buypass AS-983163327
+# Subject: CN=Buypass Class 2 Root CA O=Buypass AS-983163327
+# Label: "Buypass Class 2 Root CA"
+# Serial: 2
+# MD5 Fingerprint: 46:a7:d2:fe:45:fb:64:5a:a8:59:90:9b:78:44:9b:29
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Buypass Class 3 Root CA O=Buypass AS-983163327
+# Subject: CN=Buypass Class 3 Root CA O=Buypass AS-983163327
+# Label: "Buypass Class 3 Root CA"
+# Serial: 2
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=T-TeleSec GlobalRoot Class 3 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
+# Subject: CN=T-TeleSec GlobalRoot Class 3 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
+# Label: "T-TeleSec GlobalRoot Class 3"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=EE Certification Centre Root CA O=AS Sertifitseerimiskeskus
+# Subject: CN=EE Certification Centre Root CA O=AS Sertifitseerimiskeskus
+# Label: "EE Certification Centre Root CA"
+# Serial: 112324828676200291871926431888494945866
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=D-TRUST Root Class 3 CA 2 2009 O=D-Trust GmbH
+# Subject: CN=D-TRUST Root Class 3 CA 2 2009 O=D-Trust GmbH
+# Label: "D-TRUST Root Class 3 CA 2 2009"
+# Serial: 623603
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=D-TRUST Root Class 3 CA 2 EV 2009 O=D-Trust GmbH
+# Subject: CN=D-TRUST Root Class 3 CA 2 EV 2009 O=D-Trust GmbH
+# Label: "D-TRUST Root Class 3 CA 2 EV 2009"
+# Serial: 623604
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=CA Disig Root R2 O=Disig a.s.
+# Subject: CN=CA Disig Root R2 O=Disig a.s.
+# Label: "CA Disig Root R2"
+# Serial: 10572350602393338211
+# MD5 Fingerprint: 26:01:fb:d8:27:a7:17:9a:45:54:38:1a:43:01:3b:03
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=ACCVRAIZ1 O=ACCV OU=PKIACCV
+# Label: "ACCVRAIZ1"
+# Serial: 6828503384748696800
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=TWCA Global Root CA O=TAIWAN-CA OU=Root CA
+# Subject: CN=TWCA Global Root CA O=TAIWAN-CA OU=Root CA
+# Label: "TWCA Global Root CA"
+# Serial: 3262
+# MD5 Fingerprint: f9:03:7e:cf:e6:9e:3c:73:7a:2a:90:07:69:ff:2b:96
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=TeliaSonera Root CA v1 O=TeliaSonera
+# Subject: CN=TeliaSonera Root CA v1 O=TeliaSonera
+# Label: "TeliaSonera Root CA v1"
+# Serial: 199041966741090107964904287217786801558
+# MD5 Fingerprint: 37:41:49:1b:18:56:9a:26:f5:ad:c2:66:fb:40:a5:4c
+# SHA1 Fingerprint: 43:13:bb:96:f1:d5:86:9b:c1:4e:6a:92:f6:cf:f6:34:69:87:82:37
+# SHA256 Fingerprint: dd:69:36:fe:21:f8:f0:77:c1:23:a1:a5:21:c1:22:24:f7:22:55:b7:3e:03:a7:26:06:93:e8:a2:4b:0f:a3:89
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=E-Tugra Certification Authority O=E-Tu\u011fra EBG Bili\u015fim Teknolojileri ve Hizmetleri A.\u015e. OU=E-Tugra Sertifikasyon Merkezi
+# Subject: CN=E-Tugra Certification Authority O=E-Tu\u011fra EBG Bili\u015fim Teknolojileri ve Hizmetleri A.\u015e. OU=E-Tugra Sertifikasyon Merkezi
+# Label: "E-Tugra Certification Authority"
+# Serial: 7667447206703254355
+# MD5 Fingerprint: b8:a1:03:63:b0:bd:21:71:70:8a:6f:13:3a:bb:79:49
+# SHA1 Fingerprint: 51:c6:e7:08:49:06:6e:f3:92:d4:5c:a0:0d:6d:a3:62:8f:c3:52:39
+# SHA256 Fingerprint: b0:bf:d5:2b:b0:d7:d9:bd:92:bf:5d:4d:c1:3d:a2:55:c0:2c:54:2f:37:83:65:ea:89:39:11:f5:5e:55:f2:3c
+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=T-TeleSec GlobalRoot Class 2 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
+# Subject: CN=T-TeleSec GlobalRoot Class 2 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
+# Label: "T-TeleSec GlobalRoot Class 2"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Atos TrustedRoot 2011 O=Atos
+# Subject: CN=Atos TrustedRoot 2011 O=Atos
+# Label: "Atos TrustedRoot 2011"
+# Serial: 6643877497813316402
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=QuoVadis Root CA 1 G3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 1 G3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 1 G3"
+# Serial: 687049649626669250736271037606554624078720034195
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=QuoVadis Root CA 2 G3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 2 G3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 2 G3"
+# Serial: 390156079458959257446133169266079962026824725800
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=QuoVadis Root CA 3 G3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 3 G3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 3 G3"
+# Serial: 268090761170461462463995952157327242137089239581
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=DigiCert Assured ID Root G2 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Assured ID Root G2 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Assured ID Root G2"
+# Serial: 15385348160840213938643033620894905419
+# MD5 Fingerprint: 92:38:b9:f8:63:24:82:65:2c:57:33:e6:fe:81:8f:9d
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Assured ID Root G3 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Assured ID Root G3 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Assured ID Root G3"
+# Serial: 15459312981008553731928384953135426796
+# MD5 Fingerprint: 7c:7f:65:31:0c:81:df:8d:ba:3e:99:e2:5c:ad:6e:fb
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=DigiCert Global Root G2 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Global Root G2 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Global Root G2"
+# Serial: 4293743540046975378534879503202253541
+# MD5 Fingerprint: e4:a6:8a:c8:54:ac:52:42:46:0a:fd:72:48:1b:2a:44
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Global Root G3 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Global Root G3 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Global Root G3"
+# Serial: 7089244469030293291760083333884364146
+# MD5 Fingerprint: f5:5d:a4:50:a5:fb:28:7e:1e:0f:0d:cc:96:57:56:ca
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Trusted Root G4 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Trusted Root G4 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Trusted Root G4"
+# Serial: 7451500558977370777930084869016614236
+# MD5 Fingerprint: 78:f2:fc:aa:60:1f:2f:b4:eb:c9:37:ba:53:2e:75:49
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=COMODO RSA Certification Authority O=COMODO CA Limited
+# Subject: CN=COMODO RSA Certification Authority O=COMODO CA Limited
+# Label: "COMODO RSA Certification Authority"
+# Serial: 101909084537582093308941363524873193117
+# MD5 Fingerprint: 1b:31:b0:71:40:36:cc:14:36:91:ad:c4:3e:fd:ec:18
+# SHA1 Fingerprint: af:e5:d2:44:a8:d1:19:42:30:ff:47:9f:e2:f8:97:bb:cd:7a:8c:b4
+# SHA256 Fingerprint: 52:f0:e1:c4:e5:8e:c6:29:29:1b:60:31:7f:07:46:71:b8:5d:7e:a8:0d:5b:07:27:34:63:53:4b:32:b4:02:34
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=USERTrust RSA Certification Authority O=The USERTRUST Network
+# Subject: CN=USERTrust RSA Certification Authority O=The USERTRUST Network
+# Label: "USERTrust RSA Certification Authority"
+# Serial: 2645093764781058787591871645665788717
+# MD5 Fingerprint: 1b:fe:69:d1:91:b7:19:33:a3:72:a8:0f:e1:55:e5:b5
+# SHA1 Fingerprint: 2b:8f:1b:57:33:0d:bb:a2:d0:7a:6c:51:f7:0e:e9:0d:da:b9:ad:8e
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=USERTrust ECC Certification Authority O=The USERTRUST Network
+# Subject: CN=USERTrust ECC Certification Authority O=The USERTRUST Network
+# Label: "USERTrust ECC Certification Authority"
+# Serial: 123013823720199481456569720443997572134
+# MD5 Fingerprint: fa:68:bc:d9:b5:7f:ad:fd:c9:1d:06:83:28:cc:24:c1
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R4
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R4
+# Label: "GlobalSign ECC Root CA - R4"
+# Serial: 14367148294922964480859022125800977897474
+# MD5 Fingerprint: 20:f0:27:68:d1:7e:a0:9d:0e:e6:2a:ca:df:5c:89:8e
+# SHA1 Fingerprint: 69:69:56:2e:40:80:f4:24:a1:e7:19:9f:14:ba:f3:ee:58:ab:6a:bb
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R5
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R5
+# Label: "GlobalSign ECC Root CA - R5"
+# Serial: 32785792099990507226680698011560947931244
+# MD5 Fingerprint: 9f:ad:3b:1c:02:1e:8a:ba:17:74:38:81:0c:a2:bc:08
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Staat der Nederlanden Root CA - G3 O=Staat der Nederlanden
+# Subject: CN=Staat der Nederlanden Root CA - G3 O=Staat der Nederlanden
+# Label: "Staat der Nederlanden Root CA - G3"
+# Serial: 10003001
+# MD5 Fingerprint: 0b:46:67:07:db:10:2f:19:8c:35:50:60:d1:0b:f4:37
+# SHA1 Fingerprint: d8:eb:6b:41:51:92:59:e0:f3:e7:85:00:c0:3d:b6:88:97:c9:ee:fc
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Staat der Nederlanden EV Root CA O=Staat der Nederlanden
+# Subject: CN=Staat der Nederlanden EV Root CA O=Staat der Nederlanden
+# Label: "Staat der Nederlanden EV Root CA"
+# Serial: 10000013
+# MD5 Fingerprint: fc:06:af:7b:e8:1a:f1:9a:b4:e8:d2:70:1f:c0:f5:ba
+# SHA1 Fingerprint: 76:e2:7e:c1:4f:db:82:c1:c0:a6:75:b5:05:be:3d:29:b4:ed:db:bb
+# SHA256 Fingerprint: 4d:24:91:41:4c:fe:95:67:46:ec:4c:ef:a6:cf:6f:72:e2:8a:13:29:43:2f:9d:8a:90:7a:c4:cb:5d:ad:c1:5a
+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=IdenTrust Public Sector Root CA 1 O=IdenTrust
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+# Label: "IdenTrust Public Sector Root CA 1"
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+# Subject: CN=Entrust Root Certification Authority - G2 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2009 Entrust, Inc. - for authorized use only
+# Label: "Entrust Root Certification Authority - G2"
+# Serial: 1246989352
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Entrust Root Certification Authority - EC1 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2012 Entrust, Inc. - for authorized use only
+# Subject: CN=Entrust Root Certification Authority - EC1 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2012 Entrust, Inc. - for authorized use only
+# Label: "Entrust Root Certification Authority - EC1"
+# Serial: 51543124481930649114116133369
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=CFCA EV ROOT O=China Financial Certification Authority
+# Subject: CN=CFCA EV ROOT O=China Financial Certification Authority
+# Label: "CFCA EV ROOT"
+# Serial: 407555286
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+-----BEGIN CERTIFICATE-----
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+# Label: "Certum Trusted Network CA 2"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Hellenic Academic and Research Institutions RootCA 2015 O=Hellenic Academic and Research Institutions Cert. Authority
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=ISRG Root X1 O=Internet Security Research Group
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+# Issuer: O=FNMT-RCM OU=AC RAIZ FNMT-RCM
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Amazon Root CA 1 O=Amazon
+# Subject: CN=Amazon Root CA 1 O=Amazon
+# Label: "Amazon Root CA 1"
+# Serial: 143266978916655856878034712317230054538369994
+# MD5 Fingerprint: 43:c6:bf:ae:ec:fe:ad:2f:18:c6:88:68:30:fc:c8:e6
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Amazon Root CA 2 O=Amazon
+# Subject: CN=Amazon Root CA 2 O=Amazon
+# Label: "Amazon Root CA 2"
+# Serial: 143266982885963551818349160658925006970653239
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Amazon Root CA 3 O=Amazon
+# Subject: CN=Amazon Root CA 3 O=Amazon
+# Label: "Amazon Root CA 3"
+# Serial: 143266986699090766294700635381230934788665930
+# MD5 Fingerprint: a0:d4:ef:0b:f7:b5:d8:49:95:2a:ec:f5:c4:fc:81:87
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Amazon Root CA 4 O=Amazon
+# Subject: CN=Amazon Root CA 4 O=Amazon
+# Label: "Amazon Root CA 4"
+# Serial: 143266989758080763974105200630763877849284878
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1 O=Turkiye Bilimsel ve Teknolojik Arastirma Kurumu - TUBITAK OU=Kamu Sertifikasyon Merkezi - Kamu SM
+# Subject: CN=TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1 O=Turkiye Bilimsel ve Teknolojik Arastirma Kurumu - TUBITAK OU=Kamu Sertifikasyon Merkezi - Kamu SM
+# Label: "TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GDCA TrustAUTH R5 ROOT O=GUANG DONG CERTIFICATE AUTHORITY CO.,LTD.
+# Subject: CN=GDCA TrustAUTH R5 ROOT O=GUANG DONG CERTIFICATE AUTHORITY CO.,LTD.
+# Label: "GDCA TrustAUTH R5 ROOT"
+# Serial: 9009899650740120186
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=TrustCor RootCert CA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
+# Label: "TrustCor RootCert CA-1"
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=TrustCor RootCert CA-2 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
+# Label: "TrustCor RootCert CA-2"
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+# Label: "TrustCor ECA-1"
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SSL.com Root Certification Authority RSA O=SSL Corporation
+# Subject: CN=SSL.com Root Certification Authority RSA O=SSL Corporation
+# Label: "SSL.com Root Certification Authority RSA"
+# Serial: 8875640296558310041
+# MD5 Fingerprint: 86:69:12:c0:70:f1:ec:ac:ac:c2:d5:bc:a5:5b:a1:29
+# SHA1 Fingerprint: b7:ab:33:08:d1:ea:44:77:ba:14:80:12:5a:6f:bd:a9:36:49:0c:bb
+# SHA256 Fingerprint: 85:66:6a:56:2e:e0:be:5c:e9:25:c1:d8:89:0a:6f:76:a8:7e:c1:6d:4d:7d:5f:29:ea:74:19:cf:20:12:3b:69
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SSL.com Root Certification Authority ECC O=SSL Corporation
+# Subject: CN=SSL.com Root Certification Authority ECC O=SSL Corporation
+# Label: "SSL.com Root Certification Authority ECC"
+# Serial: 8495723813297216424
+# MD5 Fingerprint: 2e:da:e4:39:7f:9c:8f:37:d1:70:9f:26:17:51:3a:8e
+# SHA1 Fingerprint: c3:19:7c:39:24:e6:54:af:1b:c4:ab:20:95:7a:e2:c3:0e:13:02:6a
+# SHA256 Fingerprint: 34:17:bb:06:cc:60:07:da:1b:96:1c:92:0b:8a:b4:ce:3f:ad:82:0e:4a:a3:0b:9a:cb:c4:a7:4e:bd:ce:bc:65
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SSL.com EV Root Certification Authority RSA R2 O=SSL Corporation
+# Subject: CN=SSL.com EV Root Certification Authority RSA R2 O=SSL Corporation
+# Label: "SSL.com EV Root Certification Authority RSA R2"
+# Serial: 6248227494352943350
+# MD5 Fingerprint: e1:1e:31:58:1a:ae:54:53:02:f6:17:6a:11:7b:4d:95
+# SHA1 Fingerprint: 74:3a:f0:52:9b:d0:32:a0:f4:4a:83:cd:d4:ba:a9:7b:7c:2e:c4:9a
+# SHA256 Fingerprint: 2e:7b:f1:6c:c2:24:85:a7:bb:e2:aa:86:96:75:07:61:b0:ae:39:be:3b:2f:e9:d0:cc:6d:4e:f7:34:91:42:5c
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SSL.com EV Root Certification Authority ECC O=SSL Corporation
+# Subject: CN=SSL.com EV Root Certification Authority ECC O=SSL Corporation
+# Label: "SSL.com EV Root Certification Authority ECC"
+# Serial: 3182246526754555285
+# MD5 Fingerprint: 59:53:22:65:83:42:01:54:c0:ce:42:b9:5a:7c:f2:90
+# SHA1 Fingerprint: 4c:dd:51:a3:d1:f5:20:32:14:b0:c6:c5:32:23:03:91:c7:46:42:6d
+# SHA256 Fingerprint: 22:a2:c1:f7:bd:ed:70:4c:c1:e7:01:b5:f4:08:c3:10:88:0f:e9:56:b5:de:2a:4a:44:f9:9c:87:3a:25:a7:c8
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
+# Label: "GlobalSign Root CA - R6"
+# Serial: 1417766617973444989252670301619537
+# MD5 Fingerprint: 4f:dd:07:e4:d4:22:64:39:1e:0c:37:42:ea:d1:c6:ae
+# SHA1 Fingerprint: 80:94:64:0e:b5:a7:a1:ca:11:9c:1f:dd:d5:9f:81:02:63:a7:fb:d1
+# SHA256 Fingerprint: 2c:ab:ea:fe:37:d0:6c:a2:2a:ba:73:91:c0:03:3d:25:98:29:52:c4:53:64:73:49:76:3a:3a:b5:ad:6c:cf:69
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=OISTE WISeKey Global Root GC CA O=WISeKey OU=OISTE Foundation Endorsed
+# Subject: CN=OISTE WISeKey Global Root GC CA O=WISeKey OU=OISTE Foundation Endorsed
+# Label: "OISTE WISeKey Global Root GC CA"
+# Serial: 44084345621038548146064804565436152554
+# MD5 Fingerprint: a9:d6:b9:2d:2f:93:64:f8:a5:69:ca:91:e9:68:07:23
+# SHA1 Fingerprint: e0:11:84:5e:34:de:be:88:81:b9:9c:f6:16:26:d1:96:1f:c3:b9:31
+# SHA256 Fingerprint: 85:60:f9:1c:36:24:da:ba:95:70:b5:fe:a0:db:e3:6f:f1:1a:83:23:be:94:86:85:4f:b3:f3:4a:55:71:19:8d
+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GTS Root R1 O=Google Trust Services LLC
+# Subject: CN=GTS Root R1 O=Google Trust Services LLC
+# Label: "GTS Root R1"
+# Serial: 146587175971765017618439757810265552097
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+# Issuer: CN=GTS Root R2 O=Google Trust Services LLC
+# Subject: CN=GTS Root R2 O=Google Trust Services LLC
+# Label: "GTS Root R2"
+# Serial: 146587176055767053814479386953112547951
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+# Issuer: CN=GTS Root R3 O=Google Trust Services LLC
+# Subject: CN=GTS Root R3 O=Google Trust Services LLC
+# Label: "GTS Root R3"
+# Serial: 146587176140553309517047991083707763997
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+# Issuer: CN=GTS Root R4 O=Google Trust Services LLC
+# Subject: CN=GTS Root R4 O=Google Trust Services LLC
+# Label: "GTS Root R4"
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+# Issuer: CN=UCA Global G2 Root O=UniTrust
+# Subject: CN=UCA Global G2 Root O=UniTrust
+# Label: "UCA Global G2 Root"
+# Serial: 124779693093741543919145257850076631279
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=UCA Extended Validation Root O=UniTrust
+# Subject: CN=UCA Extended Validation Root O=UniTrust
+# Label: "UCA Extended Validation Root"
+# Serial: 106100277556486529736699587978573607008
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Certigna Root CA O=Dhimyotis OU=0002 48146308100036
+# Subject: CN=Certigna Root CA O=Dhimyotis OU=0002 48146308100036
+# Label: "Certigna Root CA"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign Root CA - G1 O=eMudhra Technologies Limited OU=emSign PKI
+# Subject: CN=emSign Root CA - G1 O=eMudhra Technologies Limited OU=emSign PKI
+# Label: "emSign Root CA - G1"
+# Serial: 235931866688319308814040
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign ECC Root CA - G3 O=eMudhra Technologies Limited OU=emSign PKI
+# Subject: CN=emSign ECC Root CA - G3 O=eMudhra Technologies Limited OU=emSign PKI
+# Label: "emSign ECC Root CA - G3"
+# Serial: 287880440101571086945156
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign Root CA - C1 O=eMudhra Inc OU=emSign PKI
+# Subject: CN=emSign Root CA - C1 O=eMudhra Inc OU=emSign PKI
+# Label: "emSign Root CA - C1"
+# Serial: 825510296613316004955058
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign ECC Root CA - C3 O=eMudhra Inc OU=emSign PKI
+# Subject: CN=emSign ECC Root CA - C3 O=eMudhra Inc OU=emSign PKI
+# Label: "emSign ECC Root CA - C3"
+# Serial: 582948710642506000014504
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=Hongkong Post Root CA 3 O=Hongkong Post
+# Subject: CN=Hongkong Post Root CA 3 O=Hongkong Post
+# Label: "Hongkong Post Root CA 3"
+# Serial: 46170865288971385588281144162979347873371282084
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Entrust Root Certification Authority - G4 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2015 Entrust, Inc. - for authorized use only
+# Subject: CN=Entrust Root Certification Authority - G4 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2015 Entrust, Inc. - for authorized use only
+# Label: "Entrust Root Certification Authority - G4"
+# Serial: 289383649854506086828220374796556676440
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Microsoft ECC Root Certificate Authority 2017 O=Microsoft Corporation
+# Subject: CN=Microsoft ECC Root Certificate Authority 2017 O=Microsoft Corporation
+# Label: "Microsoft ECC Root Certificate Authority 2017"
+# Serial: 136839042543790627607696632466672567020
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Microsoft RSA Root Certificate Authority 2017 O=Microsoft Corporation
+# Subject: CN=Microsoft RSA Root Certificate Authority 2017 O=Microsoft Corporation
+# Label: "Microsoft RSA Root Certificate Authority 2017"
+# Serial: 40975477897264996090493496164228220339
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=e-Szigno Root CA 2017 O=Microsec Ltd.
+# Subject: CN=e-Szigno Root CA 2017 O=Microsec Ltd.
+# Label: "e-Szigno Root CA 2017"
+# Serial: 411379200276854331539784714
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: O=CERTSIGN SA OU=certSIGN ROOT CA G2
+# Subject: O=CERTSIGN SA OU=certSIGN ROOT CA G2
+# Label: "certSIGN Root CA G2"
+# Serial: 313609486401300475190
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+-----BEGIN CERTIFICATE-----
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+OJD7uNGzcgbJceaBxXntC6Z58hMLnPddDnskk7RI24Zf3lCGeOdA5jGokHZwYa+c
+NywRtYK3qq4kNFtyDGkNzVmf9nGvnAvRCjj5BiKDUyUM/FHE5r7iOZULJK2v0ZXk
+ltd0ZGtxTgI8qoXzIKNDOXZbbFD+mpwUHmUUihW9o4JFWklWatKcsWMy5WHgUyIO
+pwpJ6st+H6jiYoD2EEVSmAYY3qXNL3+q1Ok+CHLsIwMCPKaq2LxndD0UF/tUSxfj
+03k9bWtJySgOLnRQvwzZRjoQhsmnP+mg7H/rpXdYaXHmgwo38oZJar55CJD2AhZk
+PuXaTH4MNMn5X7azKFGnpyuqSfqNZSlO42sTp5SjLVFteAxEy9/eCG/Oo2Sr05WE
+1LlSVHJ7liXMvGnjSG4N0MedJ5qq+BOS3R7fY581qRY27Iy4g/Q9iY/NtBde17MX
+QRBdJ3NghVdJIgc=
+-----END CERTIFICATE-----
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/core.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/core.py
new file mode 100644
index 0000000..8987449
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/certifi/core.py
@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+
+"""
+certifi.py
+~~~~~~~~~~
+
+This module returns the installation location of cacert.pem or its contents.
+"""
+import os
+
+try:
+    from importlib.resources import path as get_path, read_text
+
+    _CACERT_CTX = None
+    _CACERT_PATH = None
+
+    def where():
+        # This is slightly terrible, but we want to delay extracting the file
+        # in cases where we're inside of a zipimport situation until someone
+        # actually calls where(), but we don't want to re-extract the file
+        # on every call of where(), so we'll do it once then store it in a
+        # global variable.
+        global _CACERT_CTX
+        global _CACERT_PATH
+        if _CACERT_PATH is None:
+            # This is slightly janky, the importlib.resources API wants you to
+            # manage the cleanup of this file, so it doesn't actually return a
+            # path, it returns a context manager that will give you the path
+            # when you enter it and will do any cleanup when you leave it. In
+            # the common case of not needing a temporary file, it will just
+            # return the file system location and the __exit__() is a no-op.
+            #
+            # We also have to hold onto the actual context manager, because
+            # it will do the cleanup whenever it gets garbage collected, so
+            # we will also store that at the global level as well.
+            _CACERT_CTX = get_path("pip._vendor.certifi", "cacert.pem")
+            _CACERT_PATH = str(_CACERT_CTX.__enter__())
+
+        return _CACERT_PATH
+
+
+except ImportError:
+    # This fallback will work for Python versions prior to 3.7 that lack the
+    # importlib.resources module but relies on the existing `where` function
+    # so won't address issues with environments like PyOxidizer that don't set
+    # __file__ on modules.
+    def read_text(_module, _path, encoding="ascii"):
+        with open(where(), "r", encoding=encoding) as data:
+            return data.read()
+
+    # If we don't have importlib.resources, then we will just do the old logic
+    # of assuming we're on the filesystem and munge the path directly.
+    def where():
+        f = os.path.dirname(__file__)
+
+        return os.path.join(f, "cacert.pem")
+
+
+def contents():
+    return read_text("certifi", "cacert.pem", encoding="ascii")
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/__init__.py
new file mode 100644
index 0000000..0f9f820
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/__init__.py
@@ -0,0 +1,39 @@
+######################## BEGIN LICENSE BLOCK ########################
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+
+from .compat import PY2, PY3
+from .universaldetector import UniversalDetector
+from .version import __version__, VERSION
+
+
+def detect(byte_str):
+    """
+    Detect the encoding of the given byte string.
+
+    :param byte_str:     The byte sequence to examine.
+    :type byte_str:      ``bytes`` or ``bytearray``
+    """
+    if not isinstance(byte_str, bytearray):
+        if not isinstance(byte_str, bytes):
+            raise TypeError('Expected object of type bytes or bytearray, got: '
+                            '{0}'.format(type(byte_str)))
+        else:
+            byte_str = bytearray(byte_str)
+    detector = UniversalDetector()
+    detector.feed(byte_str)
+    return detector.close()
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/big5freq.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/big5freq.py
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@@ -0,0 +1,386 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# Big5 frequency table
+# by Taiwan's Mandarin Promotion Council
+# <http://www.edu.tw:81/mandr/>
+#
+# 128  --> 0.42261
+# 256  --> 0.57851
+# 512  --> 0.74851
+# 1024 --> 0.89384
+# 2048 --> 0.97583
+#
+# Ideal Distribution Ratio = 0.74851/(1-0.74851) =2.98
+# Random Distribution Ration = 512/(5401-512)=0.105
+#
+# Typical Distribution Ratio about 25% of Ideal one, still much higher than RDR
+
+BIG5_TYPICAL_DISTRIBUTION_RATIO = 0.75
+
+#Char to FreqOrder table
+BIG5_TABLE_SIZE = 5376
+
+BIG5_CHAR_TO_FREQ_ORDER = (
+   1,1801,1506, 255,1431, 198,   9,  82,   6,5008, 177, 202,3681,1256,2821, 110, #   16
+3814,  33,3274, 261,  76,  44,2114,  16,2946,2187,1176, 659,3971,  26,3451,2653, #   32
+1198,3972,3350,4202, 410,2215, 302, 590, 361,1964,   8, 204,  58,4510,5009,1932, #   48
+  63,5010,5011, 317,1614,  75, 222, 159,4203,2417,1480,5012,3555,3091, 224,2822, #   64
+3682,   3,  10,3973,1471,  29,2787,1135,2866,1940, 873, 130,3275,1123, 312,5013, #   80
+4511,2052, 507, 252, 682,5014, 142,1915, 124, 206,2947,  34,3556,3204,  64, 604, #   96
+5015,2501,1977,1978, 155,1991, 645, 641,1606,5016,3452, 337,  72, 406,5017,  80, #  112
+ 630, 238,3205,1509, 263, 939,1092,2654, 756,1440,1094,3453, 449,  69,2987, 591, #  128
+ 179,2096, 471, 115,2035,1844,  60,  50,2988, 134, 806,1869, 734,2036,3454, 180, #  144
+ 995,1607, 156, 537,2907, 688,5018, 319,1305, 779,2145, 514,2379, 298,4512, 359, #  160
+2502,  90,2716,1338, 663,  11, 906,1099,2553,  20,2441, 182, 532,1716,5019, 732, #  176
+1376,4204,1311,1420,3206,  25,2317,1056, 113, 399, 382,1950, 242,3455,2474, 529, #  192
+3276, 475,1447,3683,5020, 117,  21, 656, 810,1297,2300,2334,3557,5021, 126,4205, #  208
+ 706, 456, 150, 613,4513,  71,1118,2037,4206, 145,3092,  85, 835, 486,2115,1246, #  224
+1426, 428, 727,1285,1015, 800, 106, 623, 303,1281,5022,2128,2359, 347,3815, 221, #  240
+3558,3135,5023,1956,1153,4207,  83, 296,1199,3093, 192, 624,  93,5024, 822,1898, #  256
+2823,3136, 795,2065, 991,1554,1542,1592,  27,  43,2867, 859, 139,1456, 860,4514, #  272
+ 437, 712,3974, 164,2397,3137, 695, 211,3037,2097, 195,3975,1608,3559,3560,3684, #  288
+3976, 234, 811,2989,2098,3977,2233,1441,3561,1615,2380, 668,2077,1638, 305, 228, #  304
+1664,4515, 467, 415,5025, 262,2099,1593, 239, 108, 300, 200,1033, 512,1247,2078, #  320
+5026,5027,2176,3207,3685,2682, 593, 845,1062,3277,  88,1723,2038,3978,1951, 212, #  336
+ 266, 152, 149, 468,1899,4208,4516,  77, 187,5028,3038,  37,   5,2990,5029,3979, #  352
+5030,5031,  39,2524,4517,2908,3208,2079,  55, 148,  74,4518, 545, 483,1474,1029, #  368
+1665, 217,1870,1531,3138,1104,2655,4209,  24, 172,3562, 900,3980,3563,3564,4519, #  384
+  32,1408,2824,1312, 329, 487,2360,2251,2717, 784,2683,   4,3039,3351,1427,1789, #  400
+ 188, 109, 499,5032,3686,1717,1790, 888,1217,3040,4520,5033,3565,5034,3352,1520, #  416
+3687,3981, 196,1034, 775,5035,5036, 929,1816, 249, 439,  38,5037,1063,5038, 794, #  432
+3982,1435,2301,  46, 178,3278,2066,5039,2381,5040, 214,1709,4521, 804,  35, 707, #  448
+ 324,3688,1601,2554, 140, 459,4210,5041,5042,1365, 839, 272, 978,2262,2580,3456, #  464
+2129,1363,3689,1423, 697, 100,3094,  48,  70,1231, 495,3139,2196,5043,1294,5044, #  480
+2080, 462, 586,1042,3279, 853, 256, 988, 185,2382,3457,1698, 434,1084,5045,3458, #  496
+ 314,2625,2788,4522,2335,2336, 569,2285, 637,1817,2525, 757,1162,1879,1616,3459, #  512
+ 287,1577,2116, 768,4523,1671,2868,3566,2526,1321,3816, 909,2418,5046,4211, 933, #  528
+3817,4212,2053,2361,1222,4524, 765,2419,1322, 786,4525,5047,1920,1462,1677,2909, #  544
+1699,5048,4526,1424,2442,3140,3690,2600,3353,1775,1941,3460,3983,4213, 309,1369, #  560
+1130,2825, 364,2234,1653,1299,3984,3567,3985,3986,2656, 525,1085,3041, 902,2001, #  576
+1475, 964,4527, 421,1845,1415,1057,2286, 940,1364,3141, 376,4528,4529,1381,   7, #  592
+2527, 983,2383, 336,1710,2684,1846, 321,3461, 559,1131,3042,2752,1809,1132,1313, #  608
+ 265,1481,1858,5049, 352,1203,2826,3280, 167,1089, 420,2827, 776, 792,1724,3568, #  624
+4214,2443,3281,5050,4215,5051, 446, 229, 333,2753, 901,3818,1200,1557,4530,2657, #  640
+1921, 395,2754,2685,3819,4216,1836, 125, 916,3209,2626,4531,5052,5053,3820,5054, #  656
+5055,5056,4532,3142,3691,1133,2555,1757,3462,1510,2318,1409,3569,5057,2146, 438, #  672
+2601,2910,2384,3354,1068, 958,3043, 461, 311,2869,2686,4217,1916,3210,4218,1979, #  688
+ 383, 750,2755,2627,4219, 274, 539, 385,1278,1442,5058,1154,1965, 384, 561, 210, #  704
+  98,1295,2556,3570,5059,1711,2420,1482,3463,3987,2911,1257, 129,5060,3821, 642, #  720
+ 523,2789,2790,2658,5061, 141,2235,1333,  68, 176, 441, 876, 907,4220, 603,2602, #  736
+ 710, 171,3464, 404, 549,  18,3143,2398,1410,3692,1666,5062,3571,4533,2912,4534, #  752
+5063,2991, 368,5064, 146, 366,  99, 871,3693,1543, 748, 807,1586,1185,  22,2263, #  768
+ 379,3822,3211,5065,3212, 505,1942,2628,1992,1382,2319,5066, 380,2362, 218, 702, #  784
+1818,1248,3465,3044,3572,3355,3282,5067,2992,3694, 930,3283,3823,5068,  59,5069, #  800
+ 585, 601,4221, 497,3466,1112,1314,4535,1802,5070,1223,1472,2177,5071, 749,1837, #  816
+ 690,1900,3824,1773,3988,1476, 429,1043,1791,2236,2117, 917,4222, 447,1086,1629, #  832
+5072, 556,5073,5074,2021,1654, 844,1090, 105, 550, 966,1758,2828,1008,1783, 686, #  848
+1095,5075,2287, 793,1602,5076,3573,2603,4536,4223,2948,2302,4537,3825, 980,2503, #  864
+ 544, 353, 527,4538, 908,2687,2913,5077, 381,2629,1943,1348,5078,1341,1252, 560, #  880
+3095,5079,3467,2870,5080,2054, 973, 886,2081, 143,4539,5081,5082, 157,3989, 496, #  896
+4224,  57, 840, 540,2039,4540,4541,3468,2118,1445, 970,2264,1748,1966,2082,4225, #  912
+3144,1234,1776,3284,2829,3695, 773,1206,2130,1066,2040,1326,3990,1738,1725,4226, #  928
+ 279,3145,  51,1544,2604, 423,1578,2131,2067, 173,4542,1880,5083,5084,1583, 264, #  944
+ 610,3696,4543,2444, 280, 154,5085,5086,5087,1739, 338,1282,3096, 693,2871,1411, #  960
+1074,3826,2445,5088,4544,5089,5090,1240, 952,2399,5091,2914,1538,2688, 685,1483, #  976
+4227,2475,1436, 953,4228,2055,4545, 671,2400,  79,4229,2446,3285, 608, 567,2689, #  992
+3469,4230,4231,1691, 393,1261,1792,2401,5092,4546,5093,5094,5095,5096,1383,1672, # 1008
+3827,3213,1464, 522,1119, 661,1150, 216, 675,4547,3991,1432,3574, 609,4548,2690, # 1024
+2402,5097,5098,5099,4232,3045,   0,5100,2476, 315, 231,2447, 301,3356,4549,2385, # 1040
+5101, 233,4233,3697,1819,4550,4551,5102,  96,1777,1315,2083,5103, 257,5104,1810, # 1056
+3698,2718,1139,1820,4234,2022,1124,2164,2791,1778,2659,5105,3097, 363,1655,3214, # 1072
+5106,2993,5107,5108,5109,3992,1567,3993, 718, 103,3215, 849,1443, 341,3357,2949, # 1088
+1484,5110,1712, 127,  67, 339,4235,2403, 679,1412, 821,5111,5112, 834, 738, 351, # 1104
+2994,2147, 846, 235,1497,1881, 418,1993,3828,2719, 186,1100,2148,2756,3575,1545, # 1120
+1355,2950,2872,1377, 583,3994,4236,2581,2995,5113,1298,3699,1078,2557,3700,2363, # 1136
+  78,3829,3830, 267,1289,2100,2002,1594,4237, 348, 369,1274,2197,2178,1838,4552, # 1152
+1821,2830,3701,2757,2288,2003,4553,2951,2758, 144,3358, 882,4554,3995,2759,3470, # 1168
+4555,2915,5114,4238,1726, 320,5115,3996,3046, 788,2996,5116,2831,1774,1327,2873, # 1184
+3997,2832,5117,1306,4556,2004,1700,3831,3576,2364,2660, 787,2023, 506, 824,3702, # 1200
+ 534, 323,4557,1044,3359,2024,1901, 946,3471,5118,1779,1500,1678,5119,1882,4558, # 1216
+ 165, 243,4559,3703,2528, 123, 683,4239, 764,4560,  36,3998,1793, 589,2916, 816, # 1232
+ 626,1667,3047,2237,1639,1555,1622,3832,3999,5120,4000,2874,1370,1228,1933, 891, # 1248
+2084,2917, 304,4240,5121, 292,2997,2720,3577, 691,2101,4241,1115,4561, 118, 662, # 1264
+5122, 611,1156, 854,2386,1316,2875,   2, 386, 515,2918,5123,5124,3286, 868,2238, # 1280
+1486, 855,2661, 785,2216,3048,5125,1040,3216,3578,5126,3146, 448,5127,1525,5128, # 1296
+2165,4562,5129,3833,5130,4242,2833,3579,3147, 503, 818,4001,3148,1568, 814, 676, # 1312
+1444, 306,1749,5131,3834,1416,1030, 197,1428, 805,2834,1501,4563,5132,5133,5134, # 1328
+1994,5135,4564,5136,5137,2198,  13,2792,3704,2998,3149,1229,1917,5138,3835,2132, # 1344
+5139,4243,4565,2404,3580,5140,2217,1511,1727,1120,5141,5142, 646,3836,2448, 307, # 1360
+5143,5144,1595,3217,5145,5146,5147,3705,1113,1356,4002,1465,2529,2530,5148, 519, # 1376
+5149, 128,2133,  92,2289,1980,5150,4003,1512, 342,3150,2199,5151,2793,2218,1981, # 1392
+3360,4244, 290,1656,1317, 789, 827,2365,5152,3837,4566, 562, 581,4004,5153, 401, # 1408
+4567,2252,  94,4568,5154,1399,2794,5155,1463,2025,4569,3218,1944,5156, 828,1105, # 1424
+4245,1262,1394,5157,4246, 605,4570,5158,1784,2876,5159,2835, 819,2102, 578,2200, # 1440
+2952,5160,1502, 436,3287,4247,3288,2836,4005,2919,3472,3473,5161,2721,2320,5162, # 1456
+5163,2337,2068,  23,4571, 193, 826,3838,2103, 699,1630,4248,3098, 390,1794,1064, # 1472
+3581,5164,1579,3099,3100,1400,5165,4249,1839,1640,2877,5166,4572,4573, 137,4250, # 1488
+ 598,3101,1967, 780, 104, 974,2953,5167, 278, 899, 253, 402, 572, 504, 493,1339, # 1504
+5168,4006,1275,4574,2582,2558,5169,3706,3049,3102,2253, 565,1334,2722, 863,  41, # 1520
+5170,5171,4575,5172,1657,2338,  19, 463,2760,4251, 606,5173,2999,3289,1087,2085, # 1536
+1323,2662,3000,5174,1631,1623,1750,4252,2691,5175,2878, 791,2723,2663,2339, 232, # 1552
+2421,5176,3001,1498,5177,2664,2630, 755,1366,3707,3290,3151,2026,1609, 119,1918, # 1568
+3474, 862,1026,4253,5178,4007,3839,4576,4008,4577,2265,1952,2477,5179,1125, 817, # 1584
+4254,4255,4009,1513,1766,2041,1487,4256,3050,3291,2837,3840,3152,5180,5181,1507, # 1600
+5182,2692, 733,  40,1632,1106,2879, 345,4257, 841,2531, 230,4578,3002,1847,3292, # 1616
+3475,5183,1263, 986,3476,5184, 735, 879, 254,1137, 857, 622,1300,1180,1388,1562, # 1632
+4010,4011,2954, 967,2761,2665,1349, 592,2134,1692,3361,3003,1995,4258,1679,4012, # 1648
+1902,2188,5185, 739,3708,2724,1296,1290,5186,4259,2201,2202,1922,1563,2605,2559, # 1664
+1871,2762,3004,5187, 435,5188, 343,1108, 596,  17,1751,4579,2239,3477,3709,5189, # 1680
+4580, 294,3582,2955,1693, 477, 979, 281,2042,3583, 643,2043,3710,2631,2795,2266, # 1696
+1031,2340,2135,2303,3584,4581, 367,1249,2560,5190,3585,5191,4582,1283,3362,2005, # 1712
+ 240,1762,3363,4583,4584, 836,1069,3153, 474,5192,2149,2532, 268,3586,5193,3219, # 1728
+1521,1284,5194,1658,1546,4260,5195,3587,3588,5196,4261,3364,2693,1685,4262, 961, # 1744
+1673,2632, 190,2006,2203,3841,4585,4586,5197, 570,2504,3711,1490,5198,4587,2633, # 1760
+3293,1957,4588, 584,1514, 396,1045,1945,5199,4589,1968,2449,5200,5201,4590,4013, # 1776
+ 619,5202,3154,3294, 215,2007,2796,2561,3220,4591,3221,4592, 763,4263,3842,4593, # 1792
+5203,5204,1958,1767,2956,3365,3712,1174, 452,1477,4594,3366,3155,5205,2838,1253, # 1808
+2387,2189,1091,2290,4264, 492,5206, 638,1169,1825,2136,1752,4014, 648, 926,1021, # 1824
+1324,4595, 520,4596, 997, 847,1007, 892,4597,3843,2267,1872,3713,2405,1785,4598, # 1840
+1953,2957,3103,3222,1728,4265,2044,3714,4599,2008,1701,3156,1551,  30,2268,4266, # 1856
+5207,2027,4600,3589,5208, 501,5209,4267, 594,3478,2166,1822,3590,3479,3591,3223, # 1872
+ 829,2839,4268,5210,1680,3157,1225,4269,5211,3295,4601,4270,3158,2341,5212,4602, # 1888
+4271,5213,4015,4016,5214,1848,2388,2606,3367,5215,4603, 374,4017, 652,4272,4273, # 1904
+ 375,1140, 798,5216,5217,5218,2366,4604,2269, 546,1659, 138,3051,2450,4605,5219, # 1920
+2254, 612,1849, 910, 796,3844,1740,1371, 825,3845,3846,5220,2920,2562,5221, 692, # 1936
+ 444,3052,2634, 801,4606,4274,5222,1491, 244,1053,3053,4275,4276, 340,5223,4018, # 1952
+1041,3005, 293,1168,  87,1357,5224,1539, 959,5225,2240, 721, 694,4277,3847, 219, # 1968
+1478, 644,1417,3368,2666,1413,1401,1335,1389,4019,5226,5227,3006,2367,3159,1826, # 1984
+ 730,1515, 184,2840,  66,4607,5228,1660,2958, 246,3369, 378,1457, 226,3480, 975, # 2000
+4020,2959,1264,3592, 674, 696,5229, 163,5230,1141,2422,2167, 713,3593,3370,4608, # 2016
+4021,5231,5232,1186,  15,5233,1079,1070,5234,1522,3224,3594, 276,1050,2725, 758, # 2032
+1126, 653,2960,3296,5235,2342, 889,3595,4022,3104,3007, 903,1250,4609,4023,3481, # 2048
+3596,1342,1681,1718, 766,3297, 286,  89,2961,3715,5236,1713,5237,2607,3371,3008, # 2064
+5238,2962,2219,3225,2880,5239,4610,2505,2533, 181, 387,1075,4024, 731,2190,3372, # 2080
+5240,3298, 310, 313,3482,2304, 770,4278,  54,3054, 189,4611,3105,3848,4025,5241, # 2096
+1230,1617,1850, 355,3597,4279,4612,3373, 111,4280,3716,1350,3160,3483,3055,4281, # 2112
+2150,3299,3598,5242,2797,4026,4027,3009, 722,2009,5243,1071, 247,1207,2343,2478, # 2128
+1378,4613,2010, 864,1437,1214,4614, 373,3849,1142,2220, 667,4615, 442,2763,2563, # 2144
+3850,4028,1969,4282,3300,1840, 837, 170,1107, 934,1336,1883,5244,5245,2119,4283, # 2160
+2841, 743,1569,5246,4616,4284, 582,2389,1418,3484,5247,1803,5248, 357,1395,1729, # 2176
+3717,3301,2423,1564,2241,5249,3106,3851,1633,4617,1114,2086,4285,1532,5250, 482, # 2192
+2451,4618,5251,5252,1492, 833,1466,5253,2726,3599,1641,2842,5254,1526,1272,3718, # 2208
+4286,1686,1795, 416,2564,1903,1954,1804,5255,3852,2798,3853,1159,2321,5256,2881, # 2224
+4619,1610,1584,3056,2424,2764, 443,3302,1163,3161,5257,5258,4029,5259,4287,2506, # 2240
+3057,4620,4030,3162,2104,1647,3600,2011,1873,4288,5260,4289, 431,3485,5261, 250, # 2256
+  97,  81,4290,5262,1648,1851,1558, 160, 848,5263, 866, 740,1694,5264,2204,2843, # 2272
+3226,4291,4621,3719,1687, 950,2479, 426, 469,3227,3720,3721,4031,5265,5266,1188, # 2288
+ 424,1996, 861,3601,4292,3854,2205,2694, 168,1235,3602,4293,5267,2087,1674,4622, # 2304
+3374,3303, 220,2565,1009,5268,3855, 670,3010, 332,1208, 717,5269,5270,3603,2452, # 2320
+4032,3375,5271, 513,5272,1209,2882,3376,3163,4623,1080,5273,5274,5275,5276,2534, # 2336
+3722,3604, 815,1587,4033,4034,5277,3605,3486,3856,1254,4624,1328,3058,1390,4035, # 2352
+1741,4036,3857,4037,5278, 236,3858,2453,3304,5279,5280,3723,3859,1273,3860,4625, # 2368
+5281, 308,5282,4626, 245,4627,1852,2480,1307,2583, 430, 715,2137,2454,5283, 270, # 2384
+ 199,2883,4038,5284,3606,2727,1753, 761,1754, 725,1661,1841,4628,3487,3724,5285, # 2400
+5286, 587,  14,3305, 227,2608, 326, 480,2270, 943,2765,3607, 291, 650,1884,5287, # 2416
+1702,1226, 102,1547,  62,3488, 904,4629,3489,1164,4294,5288,5289,1224,1548,2766, # 2432
+ 391, 498,1493,5290,1386,1419,5291,2056,1177,4630, 813, 880,1081,2368, 566,1145, # 2448
+4631,2291,1001,1035,2566,2609,2242, 394,1286,5292,5293,2069,5294,  86,1494,1730, # 2464
+4039, 491,1588, 745, 897,2963, 843,3377,4040,2767,2884,3306,1768, 998,2221,2070, # 2480
+ 397,1827,1195,1970,3725,3011,3378, 284,5295,3861,2507,2138,2120,1904,5296,4041, # 2496
+2151,4042,4295,1036,3490,1905, 114,2567,4296, 209,1527,5297,5298,2964,2844,2635, # 2512
+2390,2728,3164, 812,2568,5299,3307,5300,1559, 737,1885,3726,1210, 885,  28,2695, # 2528
+3608,3862,5301,4297,1004,1780,4632,5302, 346,1982,2222,2696,4633,3863,1742, 797, # 2544
+1642,4043,1934,1072,1384,2152, 896,4044,3308,3727,3228,2885,3609,5303,2569,1959, # 2560
+4634,2455,1786,5304,5305,5306,4045,4298,1005,1308,3728,4299,2729,4635,4636,1528, # 2576
+2610, 161,1178,4300,1983, 987,4637,1101,4301, 631,4046,1157,3229,2425,1343,1241, # 2592
+1016,2243,2570, 372, 877,2344,2508,1160, 555,1935, 911,4047,5307, 466,1170, 169, # 2608
+1051,2921,2697,3729,2481,3012,1182,2012,2571,1251,2636,5308, 992,2345,3491,1540, # 2624
+2730,1201,2071,2406,1997,2482,5309,4638, 528,1923,2191,1503,1874,1570,2369,3379, # 2640
+3309,5310, 557,1073,5311,1828,3492,2088,2271,3165,3059,3107, 767,3108,2799,4639, # 2656
+1006,4302,4640,2346,1267,2179,3730,3230, 778,4048,3231,2731,1597,2667,5312,4641, # 2672
+5313,3493,5314,5315,5316,3310,2698,1433,3311, 131,  95,1504,4049, 723,4303,3166, # 2688
+1842,3610,2768,2192,4050,2028,2105,3731,5317,3013,4051,1218,5318,3380,3232,4052, # 2704
+4304,2584, 248,1634,3864, 912,5319,2845,3732,3060,3865, 654,  53,5320,3014,5321, # 2720
+1688,4642, 777,3494,1032,4053,1425,5322, 191, 820,2121,2846, 971,4643, 931,3233, # 2736
+ 135, 664, 783,3866,1998, 772,2922,1936,4054,3867,4644,2923,3234, 282,2732, 640, # 2752
+1372,3495,1127, 922, 325,3381,5323,5324, 711,2045,5325,5326,4055,2223,2800,1937, # 2768
+4056,3382,2224,2255,3868,2305,5327,4645,3869,1258,3312,4057,3235,2139,2965,4058, # 2784
+4059,5328,2225, 258,3236,4646, 101,1227,5329,3313,1755,5330,1391,3314,5331,2924, # 2800
+2057, 893,5332,5333,5334,1402,4305,2347,5335,5336,3237,3611,5337,5338, 878,1325, # 2816
+1781,2801,4647, 259,1385,2585, 744,1183,2272,4648,5339,4060,2509,5340, 684,1024, # 2832
+4306,5341, 472,3612,3496,1165,3315,4061,4062, 322,2153, 881, 455,1695,1152,1340, # 2848
+ 660, 554,2154,4649,1058,4650,4307, 830,1065,3383,4063,4651,1924,5342,1703,1919, # 2864
+5343, 932,2273, 122,5344,4652, 947, 677,5345,3870,2637, 297,1906,1925,2274,4653, # 2880
+2322,3316,5346,5347,4308,5348,4309,  84,4310, 112, 989,5349, 547,1059,4064, 701, # 2896
+3613,1019,5350,4311,5351,3497, 942, 639, 457,2306,2456, 993,2966, 407, 851, 494, # 2912
+4654,3384, 927,5352,1237,5353,2426,3385, 573,4312, 680, 921,2925,1279,1875, 285, # 2928
+ 790,1448,1984, 719,2168,5354,5355,4655,4065,4066,1649,5356,1541, 563,5357,1077, # 2944
+5358,3386,3061,3498, 511,3015,4067,4068,3733,4069,1268,2572,3387,3238,4656,4657, # 2960
+5359, 535,1048,1276,1189,2926,2029,3167,1438,1373,2847,2967,1134,2013,5360,4313, # 2976
+1238,2586,3109,1259,5361, 700,5362,2968,3168,3734,4314,5363,4315,1146,1876,1907, # 2992
+4658,2611,4070, 781,2427, 132,1589, 203, 147, 273,2802,2407, 898,1787,2155,4071, # 3008
+4072,5364,3871,2803,5365,5366,4659,4660,5367,3239,5368,1635,3872, 965,5369,1805, # 3024
+2699,1516,3614,1121,1082,1329,3317,4073,1449,3873,  65,1128,2848,2927,2769,1590, # 3040
+3874,5370,5371,  12,2668,  45, 976,2587,3169,4661, 517,2535,1013,1037,3240,5372, # 3056
+3875,2849,5373,3876,5374,3499,5375,2612, 614,1999,2323,3877,3110,2733,2638,5376, # 3072
+2588,4316, 599,1269,5377,1811,3735,5378,2700,3111, 759,1060, 489,1806,3388,3318, # 3088
+1358,5379,5380,2391,1387,1215,2639,2256, 490,5381,5382,4317,1759,2392,2348,5383, # 3104
+4662,3878,1908,4074,2640,1807,3241,4663,3500,3319,2770,2349, 874,5384,5385,3501, # 3120
+3736,1859,  91,2928,3737,3062,3879,4664,5386,3170,4075,2669,5387,3502,1202,1403, # 3136
+3880,2969,2536,1517,2510,4665,3503,2511,5388,4666,5389,2701,1886,1495,1731,4076, # 3152
+2370,4667,5390,2030,5391,5392,4077,2702,1216, 237,2589,4318,2324,4078,3881,4668, # 3168
+4669,2703,3615,3504, 445,4670,5393,5394,5395,5396,2771,  61,4079,3738,1823,4080, # 3184
+5397, 687,2046, 935, 925, 405,2670, 703,1096,1860,2734,4671,4081,1877,1367,2704, # 3200
+3389, 918,2106,1782,2483, 334,3320,1611,1093,4672, 564,3171,3505,3739,3390, 945, # 3216
+2641,2058,4673,5398,1926, 872,4319,5399,3506,2705,3112, 349,4320,3740,4082,4674, # 3232
+3882,4321,3741,2156,4083,4675,4676,4322,4677,2408,2047, 782,4084, 400, 251,4323, # 3248
+1624,5400,5401, 277,3742, 299,1265, 476,1191,3883,2122,4324,4325,1109, 205,5402, # 3264
+2590,1000,2157,3616,1861,5403,5404,5405,4678,5406,4679,2573, 107,2484,2158,4085, # 3280
+3507,3172,5407,1533, 541,1301, 158, 753,4326,2886,3617,5408,1696, 370,1088,4327, # 3296
+4680,3618, 579, 327, 440, 162,2244, 269,1938,1374,3508, 968,3063,  56,1396,3113, # 3312
+2107,3321,3391,5409,1927,2159,4681,3016,5410,3619,5411,5412,3743,4682,2485,5413, # 3328
+2804,5414,1650,4683,5415,2613,5416,5417,4086,2671,3392,1149,3393,4087,3884,4088, # 3344
+5418,1076,  49,5419, 951,3242,3322,3323, 450,2850, 920,5420,1812,2805,2371,4328, # 3360
+1909,1138,2372,3885,3509,5421,3243,4684,1910,1147,1518,2428,4685,3886,5422,4686, # 3376
+2393,2614, 260,1796,3244,5423,5424,3887,3324, 708,5425,3620,1704,5426,3621,1351, # 3392
+1618,3394,3017,1887, 944,4329,3395,4330,3064,3396,4331,5427,3744, 422, 413,1714, # 3408
+3325, 500,2059,2350,4332,2486,5428,1344,1911, 954,5429,1668,5430,5431,4089,2409, # 3424
+4333,3622,3888,4334,5432,2307,1318,2512,3114, 133,3115,2887,4687, 629,  31,2851, # 3440
+2706,3889,4688, 850, 949,4689,4090,2970,1732,2089,4335,1496,1853,5433,4091, 620, # 3456
+3245, 981,1242,3745,3397,1619,3746,1643,3326,2140,2457,1971,1719,3510,2169,5434, # 3472
+3246,5435,5436,3398,1829,5437,1277,4690,1565,2048,5438,1636,3623,3116,5439, 869, # 3488
+2852, 655,3890,3891,3117,4092,3018,3892,1310,3624,4691,5440,5441,5442,1733, 558, # 3504
+4692,3747, 335,1549,3065,1756,4336,3748,1946,3511,1830,1291,1192, 470,2735,2108, # 3520
+2806, 913,1054,4093,5443,1027,5444,3066,4094,4693, 982,2672,3399,3173,3512,3247, # 3536
+3248,1947,2807,5445, 571,4694,5446,1831,5447,3625,2591,1523,2429,5448,2090, 984, # 3552
+4695,3749,1960,5449,3750, 852, 923,2808,3513,3751, 969,1519, 999,2049,2325,1705, # 3568
+5450,3118, 615,1662, 151, 597,4095,2410,2326,1049, 275,4696,3752,4337, 568,3753, # 3584
+3626,2487,4338,3754,5451,2430,2275, 409,3249,5452,1566,2888,3514,1002, 769,2853, # 3600
+ 194,2091,3174,3755,2226,3327,4339, 628,1505,5453,5454,1763,2180,3019,4096, 521, # 3616
+1161,2592,1788,2206,2411,4697,4097,1625,4340,4341, 412,  42,3119, 464,5455,2642, # 3632
+4698,3400,1760,1571,2889,3515,2537,1219,2207,3893,2643,2141,2373,4699,4700,3328, # 3648
+1651,3401,3627,5456,5457,3628,2488,3516,5458,3756,5459,5460,2276,2092, 460,5461, # 3664
+4701,5462,3020, 962, 588,3629, 289,3250,2644,1116,  52,5463,3067,1797,5464,5465, # 3680
+5466,1467,5467,1598,1143,3757,4342,1985,1734,1067,4702,1280,3402, 465,4703,1572, # 3696
+ 510,5468,1928,2245,1813,1644,3630,5469,4704,3758,5470,5471,2673,1573,1534,5472, # 3712
+5473, 536,1808,1761,3517,3894,3175,2645,5474,5475,5476,4705,3518,2929,1912,2809, # 3728
+5477,3329,1122, 377,3251,5478, 360,5479,5480,4343,1529, 551,5481,2060,3759,1769, # 3744
+2431,5482,2930,4344,3330,3120,2327,2109,2031,4706,1404, 136,1468,1479, 672,1171, # 3760
+3252,2308, 271,3176,5483,2772,5484,2050, 678,2736, 865,1948,4707,5485,2014,4098, # 3776
+2971,5486,2737,2227,1397,3068,3760,4708,4709,1735,2931,3403,3631,5487,3895, 509, # 3792
+2854,2458,2890,3896,5488,5489,3177,3178,4710,4345,2538,4711,2309,1166,1010, 552, # 3808
+ 681,1888,5490,5491,2972,2973,4099,1287,1596,1862,3179, 358, 453, 736, 175, 478, # 3824
+1117, 905,1167,1097,5492,1854,1530,5493,1706,5494,2181,3519,2292,3761,3520,3632, # 3840
+4346,2093,4347,5495,3404,1193,2489,4348,1458,2193,2208,1863,1889,1421,3331,2932, # 3856
+3069,2182,3521, 595,2123,5496,4100,5497,5498,4349,1707,2646, 223,3762,1359, 751, # 3872
+3121, 183,3522,5499,2810,3021, 419,2374, 633, 704,3897,2394, 241,5500,5501,5502, # 3888
+ 838,3022,3763,2277,2773,2459,3898,1939,2051,4101,1309,3122,2246,1181,5503,1136, # 3904
+2209,3899,2375,1446,4350,2310,4712,5504,5505,4351,1055,2615, 484,3764,5506,4102, # 3920
+ 625,4352,2278,3405,1499,4353,4103,5507,4104,4354,3253,2279,2280,3523,5508,5509, # 3936
+2774, 808,2616,3765,3406,4105,4355,3123,2539, 526,3407,3900,4356, 955,5510,1620, # 3952
+4357,2647,2432,5511,1429,3766,1669,1832, 994, 928,5512,3633,1260,5513,5514,5515, # 3968
+1949,2293, 741,2933,1626,4358,2738,2460, 867,1184, 362,3408,1392,5516,5517,4106, # 3984
+4359,1770,1736,3254,2934,4713,4714,1929,2707,1459,1158,5518,3070,3409,2891,1292, # 4000
+1930,2513,2855,3767,1986,1187,2072,2015,2617,4360,5519,2574,2514,2170,3768,2490, # 4016
+3332,5520,3769,4715,5521,5522, 666,1003,3023,1022,3634,4361,5523,4716,1814,2257, # 4032
+ 574,3901,1603, 295,1535, 705,3902,4362, 283, 858, 417,5524,5525,3255,4717,4718, # 4048
+3071,1220,1890,1046,2281,2461,4107,1393,1599, 689,2575, 388,4363,5526,2491, 802, # 4064
+5527,2811,3903,2061,1405,2258,5528,4719,3904,2110,1052,1345,3256,1585,5529, 809, # 4080
+5530,5531,5532, 575,2739,3524, 956,1552,1469,1144,2328,5533,2329,1560,2462,3635, # 4096
+3257,4108, 616,2210,4364,3180,2183,2294,5534,1833,5535,3525,4720,5536,1319,3770, # 4112
+3771,1211,3636,1023,3258,1293,2812,5537,5538,5539,3905, 607,2311,3906, 762,2892, # 4128
+1439,4365,1360,4721,1485,3072,5540,4722,1038,4366,1450,2062,2648,4367,1379,4723, # 4144
+2593,5541,5542,4368,1352,1414,2330,2935,1172,5543,5544,3907,3908,4724,1798,1451, # 4160
+5545,5546,5547,5548,2936,4109,4110,2492,2351, 411,4111,4112,3637,3333,3124,4725, # 4176
+1561,2674,1452,4113,1375,5549,5550,  47,2974, 316,5551,1406,1591,2937,3181,5552, # 4192
+1025,2142,3125,3182, 354,2740, 884,2228,4369,2412, 508,3772, 726,3638, 996,2433, # 4208
+3639, 729,5553, 392,2194,1453,4114,4726,3773,5554,5555,2463,3640,2618,1675,2813, # 4224
+ 919,2352,2975,2353,1270,4727,4115,  73,5556,5557, 647,5558,3259,2856,2259,1550, # 4240
+1346,3024,5559,1332, 883,3526,5560,5561,5562,5563,3334,2775,5564,1212, 831,1347, # 4256
+4370,4728,2331,3909,1864,3073, 720,3910,4729,4730,3911,5565,4371,5566,5567,4731, # 4272
+5568,5569,1799,4732,3774,2619,4733,3641,1645,2376,4734,5570,2938, 669,2211,2675, # 4288
+2434,5571,2893,5572,5573,1028,3260,5574,4372,2413,5575,2260,1353,5576,5577,4735, # 4304
+3183, 518,5578,4116,5579,4373,1961,5580,2143,4374,5581,5582,3025,2354,2355,3912, # 4320
+ 516,1834,1454,4117,2708,4375,4736,2229,2620,1972,1129,3642,5583,2776,5584,2976, # 4336
+1422, 577,1470,3026,1524,3410,5585,5586, 432,4376,3074,3527,5587,2594,1455,2515, # 4352
+2230,1973,1175,5588,1020,2741,4118,3528,4737,5589,2742,5590,1743,1361,3075,3529, # 4368
+2649,4119,4377,4738,2295, 895, 924,4378,2171, 331,2247,3076, 166,1627,3077,1098, # 4384
+5591,1232,2894,2231,3411,4739, 657, 403,1196,2377, 542,3775,3412,1600,4379,3530, # 4400
+5592,4740,2777,3261, 576, 530,1362,4741,4742,2540,2676,3776,4120,5593, 842,3913, # 4416
+5594,2814,2032,1014,4121, 213,2709,3413, 665, 621,4380,5595,3777,2939,2435,5596, # 4432
+2436,3335,3643,3414,4743,4381,2541,4382,4744,3644,1682,4383,3531,1380,5597, 724, # 4448
+2282, 600,1670,5598,1337,1233,4745,3126,2248,5599,1621,4746,5600, 651,4384,5601, # 4464
+1612,4385,2621,5602,2857,5603,2743,2312,3078,5604, 716,2464,3079, 174,1255,2710, # 4480
+4122,3645, 548,1320,1398, 728,4123,1574,5605,1891,1197,3080,4124,5606,3081,3082, # 4496
+3778,3646,3779, 747,5607, 635,4386,4747,5608,5609,5610,4387,5611,5612,4748,5613, # 4512
+3415,4749,2437, 451,5614,3780,2542,2073,4388,2744,4389,4125,5615,1764,4750,5616, # 4528
+4390, 350,4751,2283,2395,2493,5617,4391,4126,2249,1434,4127, 488,4752, 458,4392, # 4544
+4128,3781, 771,1330,2396,3914,2576,3184,2160,2414,1553,2677,3185,4393,5618,2494, # 4560
+2895,2622,1720,2711,4394,3416,4753,5619,2543,4395,5620,3262,4396,2778,5621,2016, # 4576
+2745,5622,1155,1017,3782,3915,5623,3336,2313, 201,1865,4397,1430,5624,4129,5625, # 4592
+5626,5627,5628,5629,4398,1604,5630, 414,1866, 371,2595,4754,4755,3532,2017,3127, # 4608
+4756,1708, 960,4399, 887, 389,2172,1536,1663,1721,5631,2232,4130,2356,2940,1580, # 4624
+5632,5633,1744,4757,2544,4758,4759,5634,4760,5635,2074,5636,4761,3647,3417,2896, # 4640
+4400,5637,4401,2650,3418,2815, 673,2712,2465, 709,3533,4131,3648,4402,5638,1148, # 4656
+ 502, 634,5639,5640,1204,4762,3649,1575,4763,2623,3783,5641,3784,3128, 948,3263, # 4672
+ 121,1745,3916,1110,5642,4403,3083,2516,3027,4132,3785,1151,1771,3917,1488,4133, # 4688
+1987,5643,2438,3534,5644,5645,2094,5646,4404,3918,1213,1407,2816, 531,2746,2545, # 4704
+3264,1011,1537,4764,2779,4405,3129,1061,5647,3786,3787,1867,2897,5648,2018, 120, # 4720
+4406,4407,2063,3650,3265,2314,3919,2678,3419,1955,4765,4134,5649,3535,1047,2713, # 4736
+1266,5650,1368,4766,2858, 649,3420,3920,2546,2747,1102,2859,2679,5651,5652,2000, # 4752
+5653,1111,3651,2977,5654,2495,3921,3652,2817,1855,3421,3788,5655,5656,3422,2415, # 4768
+2898,3337,3266,3653,5657,2577,5658,3654,2818,4135,1460, 856,5659,3655,5660,2899, # 4784
+2978,5661,2900,3922,5662,4408, 632,2517, 875,3923,1697,3924,2296,5663,5664,4767, # 4800
+3028,1239, 580,4768,4409,5665, 914, 936,2075,1190,4136,1039,2124,5666,5667,5668, # 4816
+5669,3423,1473,5670,1354,4410,3925,4769,2173,3084,4137, 915,3338,4411,4412,3339, # 4832
+1605,1835,5671,2748, 398,3656,4413,3926,4138, 328,1913,2860,4139,3927,1331,4414, # 4848
+3029, 937,4415,5672,3657,4140,4141,3424,2161,4770,3425, 524, 742, 538,3085,1012, # 4864
+5673,5674,3928,2466,5675, 658,1103, 225,3929,5676,5677,4771,5678,4772,5679,3267, # 4880
+1243,5680,4142, 963,2250,4773,5681,2714,3658,3186,5682,5683,2596,2332,5684,4774, # 4896
+5685,5686,5687,3536, 957,3426,2547,2033,1931,2941,2467, 870,2019,3659,1746,2780, # 4912
+2781,2439,2468,5688,3930,5689,3789,3130,3790,3537,3427,3791,5690,1179,3086,5691, # 4928
+3187,2378,4416,3792,2548,3188,3131,2749,4143,5692,3428,1556,2549,2297, 977,2901, # 4944
+2034,4144,1205,3429,5693,1765,3430,3189,2125,1271, 714,1689,4775,3538,5694,2333, # 4960
+3931, 533,4417,3660,2184, 617,5695,2469,3340,3539,2315,5696,5697,3190,5698,5699, # 4976
+3932,1988, 618, 427,2651,3540,3431,5700,5701,1244,1690,5702,2819,4418,4776,5703, # 4992
+3541,4777,5704,2284,1576, 473,3661,4419,3432, 972,5705,3662,5706,3087,5707,5708, # 5008
+4778,4779,5709,3793,4145,4146,5710, 153,4780, 356,5711,1892,2902,4420,2144, 408, # 5024
+ 803,2357,5712,3933,5713,4421,1646,2578,2518,4781,4782,3934,5714,3935,4422,5715, # 5040
+2416,3433, 752,5716,5717,1962,3341,2979,5718, 746,3030,2470,4783,4423,3794, 698, # 5056
+4784,1893,4424,3663,2550,4785,3664,3936,5719,3191,3434,5720,1824,1302,4147,2715, # 5072
+3937,1974,4425,5721,4426,3192, 823,1303,1288,1236,2861,3542,4148,3435, 774,3938, # 5088
+5722,1581,4786,1304,2862,3939,4787,5723,2440,2162,1083,3268,4427,4149,4428, 344, # 5104
+1173, 288,2316, 454,1683,5724,5725,1461,4788,4150,2597,5726,5727,4789, 985, 894, # 5120
+5728,3436,3193,5729,1914,2942,3795,1989,5730,2111,1975,5731,4151,5732,2579,1194, # 5136
+ 425,5733,4790,3194,1245,3796,4429,5734,5735,2863,5736, 636,4791,1856,3940, 760, # 5152
+1800,5737,4430,2212,1508,4792,4152,1894,1684,2298,5738,5739,4793,4431,4432,2213, # 5168
+ 479,5740,5741, 832,5742,4153,2496,5743,2980,2497,3797, 990,3132, 627,1815,2652, # 5184
+4433,1582,4434,2126,2112,3543,4794,5744, 799,4435,3195,5745,4795,2113,1737,3031, # 5200
+1018, 543, 754,4436,3342,1676,4796,4797,4154,4798,1489,5746,3544,5747,2624,2903, # 5216
+4155,5748,5749,2981,5750,5751,5752,5753,3196,4799,4800,2185,1722,5754,3269,3270, # 5232
+1843,3665,1715, 481, 365,1976,1857,5755,5756,1963,2498,4801,5757,2127,3666,3271, # 5248
+ 433,1895,2064,2076,5758, 602,2750,5759,5760,5761,5762,5763,3032,1628,3437,5764, # 5264
+3197,4802,4156,2904,4803,2519,5765,2551,2782,5766,5767,5768,3343,4804,2905,5769, # 5280
+4805,5770,2864,4806,4807,1221,2982,4157,2520,5771,5772,5773,1868,1990,5774,5775, # 5296
+5776,1896,5777,5778,4808,1897,4158, 318,5779,2095,4159,4437,5780,5781, 485,5782, # 5312
+ 938,3941, 553,2680, 116,5783,3942,3667,5784,3545,2681,2783,3438,3344,2820,5785, # 5328
+3668,2943,4160,1747,2944,2983,5786,5787, 207,5788,4809,5789,4810,2521,5790,3033, # 5344
+ 890,3669,3943,5791,1878,3798,3439,5792,2186,2358,3440,1652,5793,5794,5795, 941, # 5360
+2299, 208,3546,4161,2020, 330,4438,3944,2906,2499,3799,4439,4811,5796,5797,5798, # 5376
+)
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/big5prober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/big5prober.py
new file mode 100644
index 0000000..98f9970
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/big5prober.py
@@ -0,0 +1,47 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import Big5DistributionAnalysis
+from .mbcssm import BIG5_SM_MODEL
+
+
+class Big5Prober(MultiByteCharSetProber):
+    def __init__(self):
+        super(Big5Prober, self).__init__()
+        self.coding_sm = CodingStateMachine(BIG5_SM_MODEL)
+        self.distribution_analyzer = Big5DistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "Big5"
+
+    @property
+    def language(self):
+        return "Chinese"
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/chardistribution.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/chardistribution.py
new file mode 100644
index 0000000..c0395f4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/chardistribution.py
@@ -0,0 +1,233 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .euctwfreq import (EUCTW_CHAR_TO_FREQ_ORDER, EUCTW_TABLE_SIZE,
+                        EUCTW_TYPICAL_DISTRIBUTION_RATIO)
+from .euckrfreq import (EUCKR_CHAR_TO_FREQ_ORDER, EUCKR_TABLE_SIZE,
+                        EUCKR_TYPICAL_DISTRIBUTION_RATIO)
+from .gb2312freq import (GB2312_CHAR_TO_FREQ_ORDER, GB2312_TABLE_SIZE,
+                         GB2312_TYPICAL_DISTRIBUTION_RATIO)
+from .big5freq import (BIG5_CHAR_TO_FREQ_ORDER, BIG5_TABLE_SIZE,
+                       BIG5_TYPICAL_DISTRIBUTION_RATIO)
+from .jisfreq import (JIS_CHAR_TO_FREQ_ORDER, JIS_TABLE_SIZE,
+                      JIS_TYPICAL_DISTRIBUTION_RATIO)
+
+
+class CharDistributionAnalysis(object):
+    ENOUGH_DATA_THRESHOLD = 1024
+    SURE_YES = 0.99
+    SURE_NO = 0.01
+    MINIMUM_DATA_THRESHOLD = 3
+
+    def __init__(self):
+        # Mapping table to get frequency order from char order (get from
+        # GetOrder())
+        self._char_to_freq_order = None
+        self._table_size = None  # Size of above table
+        # This is a constant value which varies from language to language,
+        # used in calculating confidence.  See
+        # http://www.mozilla.org/projects/intl/UniversalCharsetDetection.html
+        # for further detail.
+        self.typical_distribution_ratio = None
+        self._done = None
+        self._total_chars = None
+        self._freq_chars = None
+        self.reset()
+
+    def reset(self):
+        """reset analyser, clear any state"""
+        # If this flag is set to True, detection is done and conclusion has
+        # been made
+        self._done = False
+        self._total_chars = 0  # Total characters encountered
+        # The number of characters whose frequency order is less than 512
+        self._freq_chars = 0
+
+    def feed(self, char, char_len):
+        """feed a character with known length"""
+        if char_len == 2:
+            # we only care about 2-bytes character in our distribution analysis
+            order = self.get_order(char)
+        else:
+            order = -1
+        if order >= 0:
+            self._total_chars += 1
+            # order is valid
+            if order < self._table_size:
+                if 512 > self._char_to_freq_order[order]:
+                    self._freq_chars += 1
+
+    def get_confidence(self):
+        """return confidence based on existing data"""
+        # if we didn't receive any character in our consideration range,
+        # return negative answer
+        if self._total_chars <= 0 or self._freq_chars <= self.MINIMUM_DATA_THRESHOLD:
+            return self.SURE_NO
+
+        if self._total_chars != self._freq_chars:
+            r = (self._freq_chars / ((self._total_chars - self._freq_chars)
+                 * self.typical_distribution_ratio))
+            if r < self.SURE_YES:
+                return r
+
+        # normalize confidence (we don't want to be 100% sure)
+        return self.SURE_YES
+
+    def got_enough_data(self):
+        # It is not necessary to receive all data to draw conclusion.
+        # For charset detection, certain amount of data is enough
+        return self._total_chars > self.ENOUGH_DATA_THRESHOLD
+
+    def get_order(self, byte_str):
+        # We do not handle characters based on the original encoding string,
+        # but convert this encoding string to a number, here called order.
+        # This allows multiple encodings of a language to share one frequency
+        # table.
+        return -1
+
+
+class EUCTWDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(EUCTWDistributionAnalysis, self).__init__()
+        self._char_to_freq_order = EUCTW_CHAR_TO_FREQ_ORDER
+        self._table_size = EUCTW_TABLE_SIZE
+        self.typical_distribution_ratio = EUCTW_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for euc-TW encoding, we are interested
+        #   first  byte range: 0xc4 -- 0xfe
+        #   second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char = byte_str[0]
+        if first_char >= 0xC4:
+            return 94 * (first_char - 0xC4) + byte_str[1] - 0xA1
+        else:
+            return -1
+
+
+class EUCKRDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(EUCKRDistributionAnalysis, self).__init__()
+        self._char_to_freq_order = EUCKR_CHAR_TO_FREQ_ORDER
+        self._table_size = EUCKR_TABLE_SIZE
+        self.typical_distribution_ratio = EUCKR_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for euc-KR encoding, we are interested
+        #   first  byte range: 0xb0 -- 0xfe
+        #   second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char = byte_str[0]
+        if first_char >= 0xB0:
+            return 94 * (first_char - 0xB0) + byte_str[1] - 0xA1
+        else:
+            return -1
+
+
+class GB2312DistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(GB2312DistributionAnalysis, self).__init__()
+        self._char_to_freq_order = GB2312_CHAR_TO_FREQ_ORDER
+        self._table_size = GB2312_TABLE_SIZE
+        self.typical_distribution_ratio = GB2312_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for GB2312 encoding, we are interested
+        #  first  byte range: 0xb0 -- 0xfe
+        #  second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char, second_char = byte_str[0], byte_str[1]
+        if (first_char >= 0xB0) and (second_char >= 0xA1):
+            return 94 * (first_char - 0xB0) + second_char - 0xA1
+        else:
+            return -1
+
+
+class Big5DistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(Big5DistributionAnalysis, self).__init__()
+        self._char_to_freq_order = BIG5_CHAR_TO_FREQ_ORDER
+        self._table_size = BIG5_TABLE_SIZE
+        self.typical_distribution_ratio = BIG5_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for big5 encoding, we are interested
+        #   first  byte range: 0xa4 -- 0xfe
+        #   second byte range: 0x40 -- 0x7e , 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char, second_char = byte_str[0], byte_str[1]
+        if first_char >= 0xA4:
+            if second_char >= 0xA1:
+                return 157 * (first_char - 0xA4) + second_char - 0xA1 + 63
+            else:
+                return 157 * (first_char - 0xA4) + second_char - 0x40
+        else:
+            return -1
+
+
+class SJISDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(SJISDistributionAnalysis, self).__init__()
+        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
+        self._table_size = JIS_TABLE_SIZE
+        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for sjis encoding, we are interested
+        #   first  byte range: 0x81 -- 0x9f , 0xe0 -- 0xfe
+        #   second byte range: 0x40 -- 0x7e,  0x81 -- oxfe
+        # no validation needed here. State machine has done that
+        first_char, second_char = byte_str[0], byte_str[1]
+        if (first_char >= 0x81) and (first_char <= 0x9F):
+            order = 188 * (first_char - 0x81)
+        elif (first_char >= 0xE0) and (first_char <= 0xEF):
+            order = 188 * (first_char - 0xE0 + 31)
+        else:
+            return -1
+        order = order + second_char - 0x40
+        if second_char > 0x7F:
+            order = -1
+        return order
+
+
+class EUCJPDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super(EUCJPDistributionAnalysis, self).__init__()
+        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
+        self._table_size = JIS_TABLE_SIZE
+        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for euc-JP encoding, we are interested
+        #   first  byte range: 0xa0 -- 0xfe
+        #   second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        char = byte_str[0]
+        if char >= 0xA0:
+            return 94 * (char - 0xA1) + byte_str[1] - 0xa1
+        else:
+            return -1
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/charsetgroupprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/charsetgroupprober.py
new file mode 100644
index 0000000..8b3738e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/charsetgroupprober.py
@@ -0,0 +1,106 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import ProbingState
+from .charsetprober import CharSetProber
+
+
+class CharSetGroupProber(CharSetProber):
+    def __init__(self, lang_filter=None):
+        super(CharSetGroupProber, self).__init__(lang_filter=lang_filter)
+        self._active_num = 0
+        self.probers = []
+        self._best_guess_prober = None
+
+    def reset(self):
+        super(CharSetGroupProber, self).reset()
+        self._active_num = 0
+        for prober in self.probers:
+            if prober:
+                prober.reset()
+                prober.active = True
+                self._active_num += 1
+        self._best_guess_prober = None
+
+    @property
+    def charset_name(self):
+        if not self._best_guess_prober:
+            self.get_confidence()
+            if not self._best_guess_prober:
+                return None
+        return self._best_guess_prober.charset_name
+
+    @property
+    def language(self):
+        if not self._best_guess_prober:
+            self.get_confidence()
+            if not self._best_guess_prober:
+                return None
+        return self._best_guess_prober.language
+
+    def feed(self, byte_str):
+        for prober in self.probers:
+            if not prober:
+                continue
+            if not prober.active:
+                continue
+            state = prober.feed(byte_str)
+            if not state:
+                continue
+            if state == ProbingState.FOUND_IT:
+                self._best_guess_prober = prober
+                return self.state
+            elif state == ProbingState.NOT_ME:
+                prober.active = False
+                self._active_num -= 1
+                if self._active_num <= 0:
+                    self._state = ProbingState.NOT_ME
+                    return self.state
+        return self.state
+
+    def get_confidence(self):
+        state = self.state
+        if state == ProbingState.FOUND_IT:
+            return 0.99
+        elif state == ProbingState.NOT_ME:
+            return 0.01
+        best_conf = 0.0
+        self._best_guess_prober = None
+        for prober in self.probers:
+            if not prober:
+                continue
+            if not prober.active:
+                self.logger.debug('%s not active', prober.charset_name)
+                continue
+            conf = prober.get_confidence()
+            self.logger.debug('%s %s confidence = %s', prober.charset_name, prober.language, conf)
+            if best_conf < conf:
+                best_conf = conf
+                self._best_guess_prober = prober
+        if not self._best_guess_prober:
+            return 0.0
+        return best_conf
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/charsetprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/charsetprober.py
new file mode 100644
index 0000000..eac4e59
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/charsetprober.py
@@ -0,0 +1,145 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+import logging
+import re
+
+from .enums import ProbingState
+
+
+class CharSetProber(object):
+
+    SHORTCUT_THRESHOLD = 0.95
+
+    def __init__(self, lang_filter=None):
+        self._state = None
+        self.lang_filter = lang_filter
+        self.logger = logging.getLogger(__name__)
+
+    def reset(self):
+        self._state = ProbingState.DETECTING
+
+    @property
+    def charset_name(self):
+        return None
+
+    def feed(self, buf):
+        pass
+
+    @property
+    def state(self):
+        return self._state
+
+    def get_confidence(self):
+        return 0.0
+
+    @staticmethod
+    def filter_high_byte_only(buf):
+        buf = re.sub(b'([\x00-\x7F])+', b' ', buf)
+        return buf
+
+    @staticmethod
+    def filter_international_words(buf):
+        """
+        We define three types of bytes:
+        alphabet: english alphabets [a-zA-Z]
+        international: international characters [\x80-\xFF]
+        marker: everything else [^a-zA-Z\x80-\xFF]
+
+        The input buffer can be thought to contain a series of words delimited
+        by markers. This function works to filter all words that contain at
+        least one international character. All contiguous sequences of markers
+        are replaced by a single space ascii character.
+
+        This filter applies to all scripts which do not use English characters.
+        """
+        filtered = bytearray()
+
+        # This regex expression filters out only words that have at-least one
+        # international character. The word may include one marker character at
+        # the end.
+        words = re.findall(b'[a-zA-Z]*[\x80-\xFF]+[a-zA-Z]*[^a-zA-Z\x80-\xFF]?',
+                           buf)
+
+        for word in words:
+            filtered.extend(word[:-1])
+
+            # If the last character in the word is a marker, replace it with a
+            # space as markers shouldn't affect our analysis (they are used
+            # similarly across all languages and may thus have similar
+            # frequencies).
+            last_char = word[-1:]
+            if not last_char.isalpha() and last_char < b'\x80':
+                last_char = b' '
+            filtered.extend(last_char)
+
+        return filtered
+
+    @staticmethod
+    def filter_with_english_letters(buf):
+        """
+        Returns a copy of ``buf`` that retains only the sequences of English
+        alphabet and high byte characters that are not between <> characters.
+        Also retains English alphabet and high byte characters immediately
+        before occurrences of >.
+
+        This filter can be applied to all scripts which contain both English
+        characters and extended ASCII characters, but is currently only used by
+        ``Latin1Prober``.
+        """
+        filtered = bytearray()
+        in_tag = False
+        prev = 0
+
+        for curr in range(len(buf)):
+            # Slice here to get bytes instead of an int with Python 3
+            buf_char = buf[curr:curr + 1]
+            # Check if we're coming out of or entering an HTML tag
+            if buf_char == b'>':
+                in_tag = False
+            elif buf_char == b'<':
+                in_tag = True
+
+            # If current character is not extended-ASCII and not alphabetic...
+            if buf_char < b'\x80' and not buf_char.isalpha():
+                # ...and we're not in a tag
+                if curr > prev and not in_tag:
+                    # Keep everything after last non-extended-ASCII,
+                    # non-alphabetic character
+                    filtered.extend(buf[prev:curr])
+                    # Output a space to delimit stretch we kept
+                    filtered.extend(b' ')
+                prev = curr + 1
+
+        # If we're not in a tag...
+        if not in_tag:
+            # Keep everything after last non-extended-ASCII, non-alphabetic
+            # character
+            filtered.extend(buf[prev:])
+
+        return filtered
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cli/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cli/__init__.py
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cli/__init__.py
@@ -0,0 +1 @@
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cli/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cli/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..c22df32
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cli/__pycache__/chardetect.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cli/__pycache__/chardetect.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cli/chardetect.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cli/chardetect.py
new file mode 100644
index 0000000..c61136b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cli/chardetect.py
@@ -0,0 +1,85 @@
+#!/usr/bin/env python
+"""
+Script which takes one or more file paths and reports on their detected
+encodings
+
+Example::
+
+    % chardetect somefile someotherfile
+    somefile: windows-1252 with confidence 0.5
+    someotherfile: ascii with confidence 1.0
+
+If no paths are provided, it takes its input from stdin.
+
+"""
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+import argparse
+import sys
+
+from pip._vendor.chardet import __version__
+from pip._vendor.chardet.compat import PY2
+from pip._vendor.chardet.universaldetector import UniversalDetector
+
+
+def description_of(lines, name='stdin'):
+    """
+    Return a string describing the probable encoding of a file or
+    list of strings.
+
+    :param lines: The lines to get the encoding of.
+    :type lines: Iterable of bytes
+    :param name: Name of file or collection of lines
+    :type name: str
+    """
+    u = UniversalDetector()
+    for line in lines:
+        line = bytearray(line)
+        u.feed(line)
+        # shortcut out of the loop to save reading further - particularly useful if we read a BOM.
+        if u.done:
+            break
+    u.close()
+    result = u.result
+    if PY2:
+        name = name.decode(sys.getfilesystemencoding(), 'ignore')
+    if result['encoding']:
+        return '{0}: {1} with confidence {2}'.format(name, result['encoding'],
+                                                     result['confidence'])
+    else:
+        return '{0}: no result'.format(name)
+
+
+def main(argv=None):
+    """
+    Handles command line arguments and gets things started.
+
+    :param argv: List of arguments, as if specified on the command-line.
+                 If None, ``sys.argv[1:]`` is used instead.
+    :type argv: list of str
+    """
+    # Get command line arguments
+    parser = argparse.ArgumentParser(
+        description="Takes one or more file paths and reports their detected \
+                     encodings")
+    parser.add_argument('input',
+                        help='File whose encoding we would like to determine. \
+                              (default: stdin)',
+                        type=argparse.FileType('rb'), nargs='*',
+                        default=[sys.stdin if PY2 else sys.stdin.buffer])
+    parser.add_argument('--version', action='version',
+                        version='%(prog)s {0}'.format(__version__))
+    args = parser.parse_args(argv)
+
+    for f in args.input:
+        if f.isatty():
+            print("You are running chardetect interactively. Press " +
+                  "CTRL-D twice at the start of a blank line to signal the " +
+                  "end of your input. If you want help, run chardetect " +
+                  "--help\n", file=sys.stderr)
+        print(description_of(f, f.name))
+
+
+if __name__ == '__main__':
+    main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/codingstatemachine.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/codingstatemachine.py
new file mode 100644
index 0000000..68fba44
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/codingstatemachine.py
@@ -0,0 +1,88 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+import logging
+
+from .enums import MachineState
+
+
+class CodingStateMachine(object):
+    """
+    A state machine to verify a byte sequence for a particular encoding. For
+    each byte the detector receives, it will feed that byte to every active
+    state machine available, one byte at a time. The state machine changes its
+    state based on its previous state and the byte it receives. There are 3
+    states in a state machine that are of interest to an auto-detector:
+
+    START state: This is the state to start with, or a legal byte sequence
+                 (i.e. a valid code point) for character has been identified.
+
+    ME state:  This indicates that the state machine identified a byte sequence
+               that is specific to the charset it is designed for and that
+               there is no other possible encoding which can contain this byte
+               sequence. This will to lead to an immediate positive answer for
+               the detector.
+
+    ERROR state: This indicates the state machine identified an illegal byte
+                 sequence for that encoding. This will lead to an immediate
+                 negative answer for this encoding. Detector will exclude this
+                 encoding from consideration from here on.
+    """
+    def __init__(self, sm):
+        self._model = sm
+        self._curr_byte_pos = 0
+        self._curr_char_len = 0
+        self._curr_state = None
+        self.logger = logging.getLogger(__name__)
+        self.reset()
+
+    def reset(self):
+        self._curr_state = MachineState.START
+
+    def next_state(self, c):
+        # for each byte we get its class
+        # if it is first byte, we also get byte length
+        byte_class = self._model['class_table'][c]
+        if self._curr_state == MachineState.START:
+            self._curr_byte_pos = 0
+            self._curr_char_len = self._model['char_len_table'][byte_class]
+        # from byte's class and state_table, we get its next state
+        curr_state = (self._curr_state * self._model['class_factor']
+                      + byte_class)
+        self._curr_state = self._model['state_table'][curr_state]
+        self._curr_byte_pos += 1
+        return self._curr_state
+
+    def get_current_charlen(self):
+        return self._curr_char_len
+
+    def get_coding_state_machine(self):
+        return self._model['name']
+
+    @property
+    def language(self):
+        return self._model['language']
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/compat.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/compat.py
new file mode 100644
index 0000000..ddd7468
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/compat.py
@@ -0,0 +1,34 @@
+######################## BEGIN LICENSE BLOCK ########################
+# Contributor(s):
+#   Dan Blanchard
+#   Ian Cordasco
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+import sys
+
+
+if sys.version_info < (3, 0):
+    PY2 = True
+    PY3 = False
+    base_str = (str, unicode)
+    text_type = unicode
+else:
+    PY2 = False
+    PY3 = True
+    base_str = (bytes, str)
+    text_type = str
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cp949prober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cp949prober.py
new file mode 100644
index 0000000..efd793a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/cp949prober.py
@@ -0,0 +1,49 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .chardistribution import EUCKRDistributionAnalysis
+from .codingstatemachine import CodingStateMachine
+from .mbcharsetprober import MultiByteCharSetProber
+from .mbcssm import CP949_SM_MODEL
+
+
+class CP949Prober(MultiByteCharSetProber):
+    def __init__(self):
+        super(CP949Prober, self).__init__()
+        self.coding_sm = CodingStateMachine(CP949_SM_MODEL)
+        # NOTE: CP949 is a superset of EUC-KR, so the distribution should be
+        #       not different.
+        self.distribution_analyzer = EUCKRDistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "CP949"
+
+    @property
+    def language(self):
+        return "Korean"
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/enums.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/enums.py
new file mode 100644
index 0000000..0451207
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/enums.py
@@ -0,0 +1,76 @@
+"""
+All of the Enums that are used throughout the chardet package.
+
+:author: Dan Blanchard (dan.blanchard@gmail.com)
+"""
+
+
+class InputState(object):
+    """
+    This enum represents the different states a universal detector can be in.
+    """
+    PURE_ASCII = 0
+    ESC_ASCII = 1
+    HIGH_BYTE = 2
+
+
+class LanguageFilter(object):
+    """
+    This enum represents the different language filters we can apply to a
+    ``UniversalDetector``.
+    """
+    CHINESE_SIMPLIFIED = 0x01
+    CHINESE_TRADITIONAL = 0x02
+    JAPANESE = 0x04
+    KOREAN = 0x08
+    NON_CJK = 0x10
+    ALL = 0x1F
+    CHINESE = CHINESE_SIMPLIFIED | CHINESE_TRADITIONAL
+    CJK = CHINESE | JAPANESE | KOREAN
+
+
+class ProbingState(object):
+    """
+    This enum represents the different states a prober can be in.
+    """
+    DETECTING = 0
+    FOUND_IT = 1
+    NOT_ME = 2
+
+
+class MachineState(object):
+    """
+    This enum represents the different states a state machine can be in.
+    """
+    START = 0
+    ERROR = 1
+    ITS_ME = 2
+
+
+class SequenceLikelihood(object):
+    """
+    This enum represents the likelihood of a character following the previous one.
+    """
+    NEGATIVE = 0
+    UNLIKELY = 1
+    LIKELY = 2
+    POSITIVE = 3
+
+    @classmethod
+    def get_num_categories(cls):
+        """:returns: The number of likelihood categories in the enum."""
+        return 4
+
+
+class CharacterCategory(object):
+    """
+    This enum represents the different categories language models for
+    ``SingleByteCharsetProber`` put characters into.
+
+    Anything less than CONTROL is considered a letter.
+    """
+    UNDEFINED = 255
+    LINE_BREAK = 254
+    SYMBOL = 253
+    DIGIT = 252
+    CONTROL = 251
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/escprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/escprober.py
new file mode 100644
index 0000000..c70493f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/escprober.py
@@ -0,0 +1,101 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .codingstatemachine import CodingStateMachine
+from .enums import LanguageFilter, ProbingState, MachineState
+from .escsm import (HZ_SM_MODEL, ISO2022CN_SM_MODEL, ISO2022JP_SM_MODEL,
+                    ISO2022KR_SM_MODEL)
+
+
+class EscCharSetProber(CharSetProber):
+    """
+    This CharSetProber uses a "code scheme" approach for detecting encodings,
+    whereby easily recognizable escape or shift sequences are relied on to
+    identify these encodings.
+    """
+
+    def __init__(self, lang_filter=None):
+        super(EscCharSetProber, self).__init__(lang_filter=lang_filter)
+        self.coding_sm = []
+        if self.lang_filter & LanguageFilter.CHINESE_SIMPLIFIED:
+            self.coding_sm.append(CodingStateMachine(HZ_SM_MODEL))
+            self.coding_sm.append(CodingStateMachine(ISO2022CN_SM_MODEL))
+        if self.lang_filter & LanguageFilter.JAPANESE:
+            self.coding_sm.append(CodingStateMachine(ISO2022JP_SM_MODEL))
+        if self.lang_filter & LanguageFilter.KOREAN:
+            self.coding_sm.append(CodingStateMachine(ISO2022KR_SM_MODEL))
+        self.active_sm_count = None
+        self._detected_charset = None
+        self._detected_language = None
+        self._state = None
+        self.reset()
+
+    def reset(self):
+        super(EscCharSetProber, self).reset()
+        for coding_sm in self.coding_sm:
+            if not coding_sm:
+                continue
+            coding_sm.active = True
+            coding_sm.reset()
+        self.active_sm_count = len(self.coding_sm)
+        self._detected_charset = None
+        self._detected_language = None
+
+    @property
+    def charset_name(self):
+        return self._detected_charset
+
+    @property
+    def language(self):
+        return self._detected_language
+
+    def get_confidence(self):
+        if self._detected_charset:
+            return 0.99
+        else:
+            return 0.00
+
+    def feed(self, byte_str):
+        for c in byte_str:
+            for coding_sm in self.coding_sm:
+                if not coding_sm or not coding_sm.active:
+                    continue
+                coding_state = coding_sm.next_state(c)
+                if coding_state == MachineState.ERROR:
+                    coding_sm.active = False
+                    self.active_sm_count -= 1
+                    if self.active_sm_count <= 0:
+                        self._state = ProbingState.NOT_ME
+                        return self.state
+                elif coding_state == MachineState.ITS_ME:
+                    self._state = ProbingState.FOUND_IT
+                    self._detected_charset = coding_sm.get_coding_state_machine()
+                    self._detected_language = coding_sm.language
+                    return self.state
+
+        return self.state
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/escsm.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/escsm.py
new file mode 100644
index 0000000..0069523
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/escsm.py
@@ -0,0 +1,246 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import MachineState
+
+HZ_CLS = (
+1,0,0,0,0,0,0,0,  # 00 - 07
+0,0,0,0,0,0,0,0,  # 08 - 0f
+0,0,0,0,0,0,0,0,  # 10 - 17
+0,0,0,1,0,0,0,0,  # 18 - 1f
+0,0,0,0,0,0,0,0,  # 20 - 27
+0,0,0,0,0,0,0,0,  # 28 - 2f
+0,0,0,0,0,0,0,0,  # 30 - 37
+0,0,0,0,0,0,0,0,  # 38 - 3f
+0,0,0,0,0,0,0,0,  # 40 - 47
+0,0,0,0,0,0,0,0,  # 48 - 4f
+0,0,0,0,0,0,0,0,  # 50 - 57
+0,0,0,0,0,0,0,0,  # 58 - 5f
+0,0,0,0,0,0,0,0,  # 60 - 67
+0,0,0,0,0,0,0,0,  # 68 - 6f
+0,0,0,0,0,0,0,0,  # 70 - 77
+0,0,0,4,0,5,2,0,  # 78 - 7f
+1,1,1,1,1,1,1,1,  # 80 - 87
+1,1,1,1,1,1,1,1,  # 88 - 8f
+1,1,1,1,1,1,1,1,  # 90 - 97
+1,1,1,1,1,1,1,1,  # 98 - 9f
+1,1,1,1,1,1,1,1,  # a0 - a7
+1,1,1,1,1,1,1,1,  # a8 - af
+1,1,1,1,1,1,1,1,  # b0 - b7
+1,1,1,1,1,1,1,1,  # b8 - bf
+1,1,1,1,1,1,1,1,  # c0 - c7
+1,1,1,1,1,1,1,1,  # c8 - cf
+1,1,1,1,1,1,1,1,  # d0 - d7
+1,1,1,1,1,1,1,1,  # d8 - df
+1,1,1,1,1,1,1,1,  # e0 - e7
+1,1,1,1,1,1,1,1,  # e8 - ef
+1,1,1,1,1,1,1,1,  # f0 - f7
+1,1,1,1,1,1,1,1,  # f8 - ff
+)
+
+HZ_ST = (
+MachineState.START,MachineState.ERROR,     3,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,# 00-07
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 08-0f
+MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,     4,MachineState.ERROR,# 10-17
+     5,MachineState.ERROR,     6,MachineState.ERROR,     5,     5,     4,MachineState.ERROR,# 18-1f
+     4,MachineState.ERROR,     4,     4,     4,MachineState.ERROR,     4,MachineState.ERROR,# 20-27
+     4,MachineState.ITS_ME,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 28-2f
+)
+
+HZ_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0)
+
+HZ_SM_MODEL = {'class_table': HZ_CLS,
+               'class_factor': 6,
+               'state_table': HZ_ST,
+               'char_len_table': HZ_CHAR_LEN_TABLE,
+               'name': "HZ-GB-2312",
+               'language': 'Chinese'}
+
+ISO2022CN_CLS = (
+2,0,0,0,0,0,0,0,  # 00 - 07
+0,0,0,0,0,0,0,0,  # 08 - 0f
+0,0,0,0,0,0,0,0,  # 10 - 17
+0,0,0,1,0,0,0,0,  # 18 - 1f
+0,0,0,0,0,0,0,0,  # 20 - 27
+0,3,0,0,0,0,0,0,  # 28 - 2f
+0,0,0,0,0,0,0,0,  # 30 - 37
+0,0,0,0,0,0,0,0,  # 38 - 3f
+0,0,0,4,0,0,0,0,  # 40 - 47
+0,0,0,0,0,0,0,0,  # 48 - 4f
+0,0,0,0,0,0,0,0,  # 50 - 57
+0,0,0,0,0,0,0,0,  # 58 - 5f
+0,0,0,0,0,0,0,0,  # 60 - 67
+0,0,0,0,0,0,0,0,  # 68 - 6f
+0,0,0,0,0,0,0,0,  # 70 - 77
+0,0,0,0,0,0,0,0,  # 78 - 7f
+2,2,2,2,2,2,2,2,  # 80 - 87
+2,2,2,2,2,2,2,2,  # 88 - 8f
+2,2,2,2,2,2,2,2,  # 90 - 97
+2,2,2,2,2,2,2,2,  # 98 - 9f
+2,2,2,2,2,2,2,2,  # a0 - a7
+2,2,2,2,2,2,2,2,  # a8 - af
+2,2,2,2,2,2,2,2,  # b0 - b7
+2,2,2,2,2,2,2,2,  # b8 - bf
+2,2,2,2,2,2,2,2,  # c0 - c7
+2,2,2,2,2,2,2,2,  # c8 - cf
+2,2,2,2,2,2,2,2,  # d0 - d7
+2,2,2,2,2,2,2,2,  # d8 - df
+2,2,2,2,2,2,2,2,  # e0 - e7
+2,2,2,2,2,2,2,2,  # e8 - ef
+2,2,2,2,2,2,2,2,  # f0 - f7
+2,2,2,2,2,2,2,2,  # f8 - ff
+)
+
+ISO2022CN_ST = (
+MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 00-07
+MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 08-0f
+MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 10-17
+MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,# 18-1f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 20-27
+     5,     6,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 28-2f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 30-37
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,# 38-3f
+)
+
+ISO2022CN_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0, 0, 0, 0)
+
+ISO2022CN_SM_MODEL = {'class_table': ISO2022CN_CLS,
+                      'class_factor': 9,
+                      'state_table': ISO2022CN_ST,
+                      'char_len_table': ISO2022CN_CHAR_LEN_TABLE,
+                      'name': "ISO-2022-CN",
+                      'language': 'Chinese'}
+
+ISO2022JP_CLS = (
+2,0,0,0,0,0,0,0,  # 00 - 07
+0,0,0,0,0,0,2,2,  # 08 - 0f
+0,0,0,0,0,0,0,0,  # 10 - 17
+0,0,0,1,0,0,0,0,  # 18 - 1f
+0,0,0,0,7,0,0,0,  # 20 - 27
+3,0,0,0,0,0,0,0,  # 28 - 2f
+0,0,0,0,0,0,0,0,  # 30 - 37
+0,0,0,0,0,0,0,0,  # 38 - 3f
+6,0,4,0,8,0,0,0,  # 40 - 47
+0,9,5,0,0,0,0,0,  # 48 - 4f
+0,0,0,0,0,0,0,0,  # 50 - 57
+0,0,0,0,0,0,0,0,  # 58 - 5f
+0,0,0,0,0,0,0,0,  # 60 - 67
+0,0,0,0,0,0,0,0,  # 68 - 6f
+0,0,0,0,0,0,0,0,  # 70 - 77
+0,0,0,0,0,0,0,0,  # 78 - 7f
+2,2,2,2,2,2,2,2,  # 80 - 87
+2,2,2,2,2,2,2,2,  # 88 - 8f
+2,2,2,2,2,2,2,2,  # 90 - 97
+2,2,2,2,2,2,2,2,  # 98 - 9f
+2,2,2,2,2,2,2,2,  # a0 - a7
+2,2,2,2,2,2,2,2,  # a8 - af
+2,2,2,2,2,2,2,2,  # b0 - b7
+2,2,2,2,2,2,2,2,  # b8 - bf
+2,2,2,2,2,2,2,2,  # c0 - c7
+2,2,2,2,2,2,2,2,  # c8 - cf
+2,2,2,2,2,2,2,2,  # d0 - d7
+2,2,2,2,2,2,2,2,  # d8 - df
+2,2,2,2,2,2,2,2,  # e0 - e7
+2,2,2,2,2,2,2,2,  # e8 - ef
+2,2,2,2,2,2,2,2,  # f0 - f7
+2,2,2,2,2,2,2,2,  # f8 - ff
+)
+
+ISO2022JP_ST = (
+MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 00-07
+MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 08-0f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 10-17
+MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,# 18-1f
+MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,MachineState.ERROR,# 20-27
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     6,MachineState.ITS_ME,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,# 28-2f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,# 30-37
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 38-3f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,MachineState.START,# 40-47
+)
+
+ISO2022JP_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
+
+ISO2022JP_SM_MODEL = {'class_table': ISO2022JP_CLS,
+                      'class_factor': 10,
+                      'state_table': ISO2022JP_ST,
+                      'char_len_table': ISO2022JP_CHAR_LEN_TABLE,
+                      'name': "ISO-2022-JP",
+                      'language': 'Japanese'}
+
+ISO2022KR_CLS = (
+2,0,0,0,0,0,0,0,  # 00 - 07
+0,0,0,0,0,0,0,0,  # 08 - 0f
+0,0,0,0,0,0,0,0,  # 10 - 17
+0,0,0,1,0,0,0,0,  # 18 - 1f
+0,0,0,0,3,0,0,0,  # 20 - 27
+0,4,0,0,0,0,0,0,  # 28 - 2f
+0,0,0,0,0,0,0,0,  # 30 - 37
+0,0,0,0,0,0,0,0,  # 38 - 3f
+0,0,0,5,0,0,0,0,  # 40 - 47
+0,0,0,0,0,0,0,0,  # 48 - 4f
+0,0,0,0,0,0,0,0,  # 50 - 57
+0,0,0,0,0,0,0,0,  # 58 - 5f
+0,0,0,0,0,0,0,0,  # 60 - 67
+0,0,0,0,0,0,0,0,  # 68 - 6f
+0,0,0,0,0,0,0,0,  # 70 - 77
+0,0,0,0,0,0,0,0,  # 78 - 7f
+2,2,2,2,2,2,2,2,  # 80 - 87
+2,2,2,2,2,2,2,2,  # 88 - 8f
+2,2,2,2,2,2,2,2,  # 90 - 97
+2,2,2,2,2,2,2,2,  # 98 - 9f
+2,2,2,2,2,2,2,2,  # a0 - a7
+2,2,2,2,2,2,2,2,  # a8 - af
+2,2,2,2,2,2,2,2,  # b0 - b7
+2,2,2,2,2,2,2,2,  # b8 - bf
+2,2,2,2,2,2,2,2,  # c0 - c7
+2,2,2,2,2,2,2,2,  # c8 - cf
+2,2,2,2,2,2,2,2,  # d0 - d7
+2,2,2,2,2,2,2,2,  # d8 - df
+2,2,2,2,2,2,2,2,  # e0 - e7
+2,2,2,2,2,2,2,2,  # e8 - ef
+2,2,2,2,2,2,2,2,  # f0 - f7
+2,2,2,2,2,2,2,2,  # f8 - ff
+)
+
+ISO2022KR_ST = (
+MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,# 00-07
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,# 08-0f
+MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     4,MachineState.ERROR,MachineState.ERROR,# 10-17
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,# 18-1f
+MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.START,MachineState.START,MachineState.START,MachineState.START,# 20-27
+)
+
+ISO2022KR_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0)
+
+ISO2022KR_SM_MODEL = {'class_table': ISO2022KR_CLS,
+                      'class_factor': 6,
+                      'state_table': ISO2022KR_ST,
+                      'char_len_table': ISO2022KR_CHAR_LEN_TABLE,
+                      'name': "ISO-2022-KR",
+                      'language': 'Korean'}
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/eucjpprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/eucjpprober.py
new file mode 100644
index 0000000..20ce8f7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/eucjpprober.py
@@ -0,0 +1,92 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import ProbingState, MachineState
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import EUCJPDistributionAnalysis
+from .jpcntx import EUCJPContextAnalysis
+from .mbcssm import EUCJP_SM_MODEL
+
+
+class EUCJPProber(MultiByteCharSetProber):
+    def __init__(self):
+        super(EUCJPProber, self).__init__()
+        self.coding_sm = CodingStateMachine(EUCJP_SM_MODEL)
+        self.distribution_analyzer = EUCJPDistributionAnalysis()
+        self.context_analyzer = EUCJPContextAnalysis()
+        self.reset()
+
+    def reset(self):
+        super(EUCJPProber, self).reset()
+        self.context_analyzer.reset()
+
+    @property
+    def charset_name(self):
+        return "EUC-JP"
+
+    @property
+    def language(self):
+        return "Japanese"
+
+    def feed(self, byte_str):
+        for i in range(len(byte_str)):
+            # PY3K: byte_str is a byte array, so byte_str[i] is an int, not a byte
+            coding_state = self.coding_sm.next_state(byte_str[i])
+            if coding_state == MachineState.ERROR:
+                self.logger.debug('%s %s prober hit error at byte %s',
+                                  self.charset_name, self.language, i)
+                self._state = ProbingState.NOT_ME
+                break
+            elif coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            elif coding_state == MachineState.START:
+                char_len = self.coding_sm.get_current_charlen()
+                if i == 0:
+                    self._last_char[1] = byte_str[0]
+                    self.context_analyzer.feed(self._last_char, char_len)
+                    self.distribution_analyzer.feed(self._last_char, char_len)
+                else:
+                    self.context_analyzer.feed(byte_str[i - 1:i + 1],
+                                                char_len)
+                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
+                                                     char_len)
+
+        self._last_char[0] = byte_str[-1]
+
+        if self.state == ProbingState.DETECTING:
+            if (self.context_analyzer.got_enough_data() and
+               (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        context_conf = self.context_analyzer.get_confidence()
+        distrib_conf = self.distribution_analyzer.get_confidence()
+        return max(context_conf, distrib_conf)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euckrfreq.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euckrfreq.py
new file mode 100644
index 0000000..b68078c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euckrfreq.py
@@ -0,0 +1,195 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# Sampling from about 20M text materials include literature and computer technology
+
+# 128  --> 0.79
+# 256  --> 0.92
+# 512  --> 0.986
+# 1024 --> 0.99944
+# 2048 --> 0.99999
+#
+# Idea Distribution Ratio = 0.98653 / (1-0.98653) = 73.24
+# Random Distribution Ration = 512 / (2350-512) = 0.279.
+#
+# Typical Distribution Ratio
+
+EUCKR_TYPICAL_DISTRIBUTION_RATIO = 6.0
+
+EUCKR_TABLE_SIZE = 2352
+
+# Char to FreqOrder table ,
+EUCKR_CHAR_TO_FREQ_ORDER = (
+  13, 130, 120,1396, 481,1719,1720, 328, 609, 212,1721, 707, 400, 299,1722,  87,
+1397,1723, 104, 536,1117,1203,1724,1267, 685,1268, 508,1725,1726,1727,1728,1398,
+1399,1729,1730,1731, 141, 621, 326,1057, 368,1732, 267, 488,  20,1733,1269,1734,
+ 945,1400,1735,  47, 904,1270,1736,1737, 773, 248,1738, 409, 313, 786, 429,1739,
+ 116, 987, 813,1401, 683,  75,1204, 145,1740,1741,1742,1743,  16, 847, 667, 622,
+ 708,1744,1745,1746, 966, 787, 304, 129,1747,  60, 820, 123, 676,1748,1749,1750,
+1751, 617,1752, 626,1753,1754,1755,1756, 653,1757,1758,1759,1760,1761,1762, 856,
+ 344,1763,1764,1765,1766,  89, 401, 418, 806, 905, 848,1767,1768,1769, 946,1205,
+ 709,1770,1118,1771, 241,1772,1773,1774,1271,1775, 569,1776, 999,1777,1778,1779,
+1780, 337, 751,1058,  28, 628, 254,1781, 177, 906, 270, 349, 891,1079,1782,  19,
+1783, 379,1784, 315,1785, 629, 754,1402, 559,1786, 636, 203,1206,1787, 710, 567,
+1788, 935, 814,1789,1790,1207, 766, 528,1791,1792,1208,1793,1794,1795,1796,1797,
+1403,1798,1799, 533,1059,1404,1405,1156,1406, 936, 884,1080,1800, 351,1801,1802,
+1803,1804,1805, 801,1806,1807,1808,1119,1809,1157, 714, 474,1407,1810, 298, 899,
+ 885,1811,1120, 802,1158,1812, 892,1813,1814,1408, 659,1815,1816,1121,1817,1818,
+1819,1820,1821,1822, 319,1823, 594, 545,1824, 815, 937,1209,1825,1826, 573,1409,
+1022,1827,1210,1828,1829,1830,1831,1832,1833, 556, 722, 807,1122,1060,1834, 697,
+1835, 900, 557, 715,1836,1410, 540,1411, 752,1159, 294, 597,1211, 976, 803, 770,
+1412,1837,1838,  39, 794,1413, 358,1839, 371, 925,1840, 453, 661, 788, 531, 723,
+ 544,1023,1081, 869,  91,1841, 392, 430, 790, 602,1414, 677,1082, 457,1415,1416,
+1842,1843, 475, 327,1024,1417, 795, 121,1844, 733, 403,1418,1845,1846,1847, 300,
+ 119, 711,1212, 627,1848,1272, 207,1849,1850, 796,1213, 382,1851, 519,1852,1083,
+ 893,1853,1854,1855, 367, 809, 487, 671,1856, 663,1857,1858, 956, 471, 306, 857,
+1859,1860,1160,1084,1861,1862,1863,1864,1865,1061,1866,1867,1868,1869,1870,1871,
+ 282,  96, 574,1872, 502,1085,1873,1214,1874, 907,1875,1876, 827, 977,1419,1420,
+1421, 268,1877,1422,1878,1879,1880, 308,1881,   2, 537,1882,1883,1215,1884,1885,
+ 127, 791,1886,1273,1423,1887,  34, 336, 404, 643,1888, 571, 654, 894, 840,1889,
+   0, 886,1274, 122, 575, 260, 908, 938,1890,1275, 410, 316,1891,1892, 100,1893,
+1894,1123,  48,1161,1124,1025,1895, 633, 901,1276,1896,1897, 115, 816,1898, 317,
+1899, 694,1900, 909, 734,1424, 572, 866,1425, 691,  85, 524,1010, 543, 394, 841,
+1901,1902,1903,1026,1904,1905,1906,1907,1908,1909,  30, 451, 651, 988, 310,1910,
+1911,1426, 810,1216,  93,1912,1913,1277,1217,1914, 858, 759,  45,  58, 181, 610,
+ 269,1915,1916, 131,1062, 551, 443,1000, 821,1427, 957, 895,1086,1917,1918, 375,
+1919, 359,1920, 687,1921, 822,1922, 293,1923,1924,  40, 662, 118, 692,  29, 939,
+ 887, 640, 482, 174,1925,  69,1162, 728,1428, 910,1926,1278,1218,1279, 386, 870,
+ 217, 854,1163, 823,1927,1928,1929,1930, 834,1931,  78,1932, 859,1933,1063,1934,
+1935,1936,1937, 438,1164, 208, 595,1938,1939,1940,1941,1219,1125,1942, 280, 888,
+1429,1430,1220,1431,1943,1944,1945,1946,1947,1280, 150, 510,1432,1948,1949,1950,
+1951,1952,1953,1954,1011,1087,1955,1433,1043,1956, 881,1957, 614, 958,1064,1065,
+1221,1958, 638,1001, 860, 967, 896,1434, 989, 492, 553,1281,1165,1959,1282,1002,
+1283,1222,1960,1961,1962,1963,  36, 383, 228, 753, 247, 454,1964, 876, 678,1965,
+1966,1284, 126, 464, 490, 835, 136, 672, 529, 940,1088,1435, 473,1967,1968, 467,
+  50, 390, 227, 587, 279, 378, 598, 792, 968, 240, 151, 160, 849, 882,1126,1285,
+ 639,1044, 133, 140, 288, 360, 811, 563,1027, 561, 142, 523,1969,1970,1971,   7,
+ 103, 296, 439, 407, 506, 634, 990,1972,1973,1974,1975, 645,1976,1977,1978,1979,
+1980,1981, 236,1982,1436,1983,1984,1089, 192, 828, 618, 518,1166, 333,1127,1985,
+ 818,1223,1986,1987,1988,1989,1990,1991,1992,1993, 342,1128,1286, 746, 842,1994,
+1995, 560, 223,1287,  98,   8, 189, 650, 978,1288,1996,1437,1997,  17, 345, 250,
+ 423, 277, 234, 512, 226,  97, 289,  42, 167,1998, 201,1999,2000, 843, 836, 824,
+ 532, 338, 783,1090, 182, 576, 436,1438,1439, 527, 500,2001, 947, 889,2002,2003,
+2004,2005, 262, 600, 314, 447,2006, 547,2007, 693, 738,1129,2008,  71,1440, 745,
+ 619, 688,2009, 829,2010,2011, 147,2012,  33, 948,2013,2014,  74, 224,2015,  61,
+ 191, 918, 399, 637,2016,1028,1130, 257, 902,2017,2018,2019,2020,2021,2022,2023,
+2024,2025,2026, 837,2027,2028,2029,2030, 179, 874, 591,  52, 724, 246,2031,2032,
+2033,2034,1167, 969,2035,1289, 630, 605, 911,1091,1168,2036,2037,2038,1441, 912,
+2039, 623,2040,2041, 253,1169,1290,2042,1442, 146, 620, 611, 577, 433,2043,1224,
+ 719,1170, 959, 440, 437, 534,  84, 388, 480,1131, 159, 220, 198, 679,2044,1012,
+ 819,1066,1443, 113,1225, 194, 318,1003,1029,2045,2046,2047,2048,1067,2049,2050,
+2051,2052,2053,  59, 913, 112,2054, 632,2055, 455, 144, 739,1291,2056, 273, 681,
+ 499,2057, 448,2058,2059, 760,2060,2061, 970, 384, 169, 245,1132,2062,2063, 414,
+1444,2064,2065,  41, 235,2066, 157, 252, 877, 568, 919, 789, 580,2067, 725,2068,
+2069,1292,2070,2071,1445,2072,1446,2073,2074,  55, 588,  66,1447, 271,1092,2075,
+1226,2076, 960,1013, 372,2077,2078,2079,2080,2081,1293,2082,2083,2084,2085, 850,
+2086,2087,2088,2089,2090, 186,2091,1068, 180,2092,2093,2094, 109,1227, 522, 606,
+2095, 867,1448,1093, 991,1171, 926, 353,1133,2096, 581,2097,2098,2099,1294,1449,
+1450,2100, 596,1172,1014,1228,2101,1451,1295,1173,1229,2102,2103,1296,1134,1452,
+ 949,1135,2104,2105,1094,1453,1454,1455,2106,1095,2107,2108,2109,2110,2111,2112,
+2113,2114,2115,2116,2117, 804,2118,2119,1230,1231, 805,1456, 405,1136,2120,2121,
+2122,2123,2124, 720, 701,1297, 992,1457, 927,1004,2125,2126,2127,2128,2129,2130,
+  22, 417,2131, 303,2132, 385,2133, 971, 520, 513,2134,1174,  73,1096, 231, 274,
+ 962,1458, 673,2135,1459,2136, 152,1137,2137,2138,2139,2140,1005,1138,1460,1139,
+2141,2142,2143,2144,  11, 374, 844,2145, 154,1232,  46,1461,2146, 838, 830, 721,
+1233, 106,2147,  90, 428, 462, 578, 566,1175, 352,2148,2149, 538,1234, 124,1298,
+2150,1462, 761, 565,2151, 686,2152, 649,2153,  72, 173,2154, 460, 415,2155,1463,
+2156,1235, 305,2157,2158,2159,2160,2161,2162, 579,2163,2164,2165,2166,2167, 747,
+2168,2169,2170,2171,1464, 669,2172,2173,2174,2175,2176,1465,2177,  23, 530, 285,
+2178, 335, 729,2179, 397,2180,2181,2182,1030,2183,2184, 698,2185,2186, 325,2187,
+2188, 369,2189, 799,1097,1015, 348,2190,1069, 680,2191, 851,1466,2192,2193,  10,
+2194, 613, 424,2195, 979, 108, 449, 589,  27, 172,  81,1031,  80, 774, 281, 350,
+1032, 525, 301, 582,1176,2196, 674,1045,2197,2198,1467, 730, 762,2199,2200,2201,
+2202,1468,2203, 993,2204,2205, 266,1070, 963,1140,2206,2207,2208, 664,1098, 972,
+2209,2210,2211,1177,1469,1470, 871,2212,2213,2214,2215,2216,1471,2217,2218,2219,
+2220,2221,2222,2223,2224,2225,2226,2227,1472,1236,2228,2229,2230,2231,2232,2233,
+2234,2235,1299,2236,2237, 200,2238, 477, 373,2239,2240, 731, 825, 777,2241,2242,
+2243, 521, 486, 548,2244,2245,2246,1473,1300,  53, 549, 137, 875,  76, 158,2247,
+1301,1474, 469, 396,1016, 278, 712,2248, 321, 442, 503, 767, 744, 941,1237,1178,
+1475,2249,  82, 178,1141,1179, 973,2250,1302,2251, 297,2252,2253, 570,2254,2255,
+2256,  18, 450, 206,2257, 290, 292,1142,2258, 511, 162,  99, 346, 164, 735,2259,
+1476,1477,   4, 554, 343, 798,1099,2260,1100,2261,  43, 171,1303, 139, 215,2262,
+2263, 717, 775,2264,1033, 322, 216,2265, 831,2266, 149,2267,1304,2268,2269, 702,
+1238, 135, 845, 347, 309,2270, 484,2271, 878, 655, 238,1006,1478,2272,  67,2273,
+ 295,2274,2275, 461,2276, 478, 942, 412,2277,1034,2278,2279,2280, 265,2281, 541,
+2282,2283,2284,2285,2286,  70, 852,1071,2287,2288,2289,2290,  21,  56, 509, 117,
+ 432,2291,2292, 331, 980, 552,1101, 148, 284, 105, 393,1180,1239, 755,2293, 187,
+2294,1046,1479,2295, 340,2296,  63,1047, 230,2297,2298,1305, 763,1306, 101, 800,
+ 808, 494,2299,2300,2301, 903,2302,  37,1072,  14,   5,2303,  79, 675,2304, 312,
+2305,2306,2307,2308,2309,1480,   6,1307,2310,2311,2312,   1, 470,  35,  24, 229,
+2313, 695, 210,  86, 778,  15, 784, 592, 779,  32,  77, 855, 964,2314, 259,2315,
+ 501, 380,2316,2317,  83, 981, 153, 689,1308,1481,1482,1483,2318,2319, 716,1484,
+2320,2321,2322,2323,2324,2325,1485,2326,2327, 128,  57,  68, 261,1048, 211, 170,
+1240,  31,2328,  51, 435, 742,2329,2330,2331, 635,2332, 264, 456,2333,2334,2335,
+ 425,2336,1486, 143, 507, 263, 943,2337, 363, 920,1487, 256,1488,1102, 243, 601,
+1489,2338,2339,2340,2341,2342,2343,2344, 861,2345,2346,2347,2348,2349,2350, 395,
+2351,1490,1491,  62, 535, 166, 225,2352,2353, 668, 419,1241, 138, 604, 928,2354,
+1181,2355,1492,1493,2356,2357,2358,1143,2359, 696,2360, 387, 307,1309, 682, 476,
+2361,2362, 332,  12, 222, 156,2363, 232,2364, 641, 276, 656, 517,1494,1495,1035,
+ 416, 736,1496,2365,1017, 586,2366,2367,2368,1497,2369, 242,2370,2371,2372,1498,
+2373, 965, 713,2374,2375,2376,2377, 740, 982,1499, 944,1500,1007,2378,2379,1310,
+1501,2380,2381,2382, 785, 329,2383,2384,1502,2385,2386,2387, 932,2388,1503,2389,
+2390,2391,2392,1242,2393,2394,2395,2396,2397, 994, 950,2398,2399,2400,2401,1504,
+1311,2402,2403,2404,2405,1049, 749,2406,2407, 853, 718,1144,1312,2408,1182,1505,
+2409,2410, 255, 516, 479, 564, 550, 214,1506,1507,1313, 413, 239, 444, 339,1145,
+1036,1508,1509,1314,1037,1510,1315,2411,1511,2412,2413,2414, 176, 703, 497, 624,
+ 593, 921, 302,2415, 341, 165,1103,1512,2416,1513,2417,2418,2419, 376,2420, 700,
+2421,2422,2423, 258, 768,1316,2424,1183,2425, 995, 608,2426,2427,2428,2429, 221,
+2430,2431,2432,2433,2434,2435,2436,2437, 195, 323, 726, 188, 897, 983,1317, 377,
+ 644,1050, 879,2438, 452,2439,2440,2441,2442,2443,2444, 914,2445,2446,2447,2448,
+ 915, 489,2449,1514,1184,2450,2451, 515,  64, 427, 495,2452, 583,2453, 483, 485,
+1038, 562, 213,1515, 748, 666,2454,2455,2456,2457, 334,2458, 780, 996,1008, 705,
+1243,2459,2460,2461,2462,2463, 114,2464, 493,1146, 366, 163,1516, 961,1104,2465,
+ 291,2466,1318,1105,2467,1517, 365,2468, 355, 951,1244,2469,1319,2470, 631,2471,
+2472, 218,1320, 364, 320, 756,1518,1519,1321,1520,1322,2473,2474,2475,2476, 997,
+2477,2478,2479,2480, 665,1185,2481, 916,1521,2482,2483,2484, 584, 684,2485,2486,
+ 797,2487,1051,1186,2488,2489,2490,1522,2491,2492, 370,2493,1039,1187,  65,2494,
+ 434, 205, 463,1188,2495, 125, 812, 391, 402, 826, 699, 286, 398, 155, 781, 771,
+ 585,2496, 590, 505,1073,2497, 599, 244, 219, 917,1018, 952, 646,1523,2498,1323,
+2499,2500,  49, 984, 354, 741,2501, 625,2502,1324,2503,1019, 190, 357, 757, 491,
+  95, 782, 868,2504,2505,2506,2507,2508,2509, 134,1524,1074, 422,1525, 898,2510,
+ 161,2511,2512,2513,2514, 769,2515,1526,2516,2517, 411,1325,2518, 472,1527,2519,
+2520,2521,2522,2523,2524, 985,2525,2526,2527,2528,2529,2530, 764,2531,1245,2532,
+2533,  25, 204, 311,2534, 496,2535,1052,2536,2537,2538,2539,2540,2541,2542, 199,
+ 704, 504, 468, 758, 657,1528, 196,  44, 839,1246, 272, 750,2543, 765, 862,2544,
+2545,1326,2546, 132, 615, 933,2547, 732,2548,2549,2550,1189,1529,2551, 283,1247,
+1053, 607, 929,2552,2553,2554, 930, 183, 872, 616,1040,1147,2555,1148,1020, 441,
+ 249,1075,2556,2557,2558, 466, 743,2559,2560,2561,  92, 514, 426, 420, 526,2562,
+2563,2564,2565,2566,2567,2568, 185,2569,2570,2571,2572, 776,1530, 658,2573, 362,
+2574, 361, 922,1076, 793,2575,2576,2577,2578,2579,2580,1531, 251,2581,2582,2583,
+2584,1532,  54, 612, 237,1327,2585,2586, 275, 408, 647, 111,2587,1533,1106, 465,
+   3, 458,   9,  38,2588, 107, 110, 890, 209,  26, 737, 498,2589,1534,2590, 431,
+ 202,  88,1535, 356, 287,1107, 660,1149,2591, 381,1536, 986,1150, 445,1248,1151,
+ 974,2592,2593, 846,2594, 446, 953, 184,1249,1250, 727,2595, 923, 193, 883,2596,
+2597,2598, 102, 324, 539, 817,2599, 421,1041,2600, 832,2601,  94, 175, 197, 406,
+2602, 459,2603,2604,2605,2606,2607, 330, 555,2608,2609,2610, 706,1108, 389,2611,
+2612,2613,2614, 233,2615, 833, 558, 931, 954,1251,2616,2617,1537, 546,2618,2619,
+1009,2620,2621,2622,1538, 690,1328,2623, 955,2624,1539,2625,2626, 772,2627,2628,
+2629,2630,2631, 924, 648, 863, 603,2632,2633, 934,1540, 864, 865,2634, 642,1042,
+ 670,1190,2635,2636,2637,2638, 168,2639, 652, 873, 542,1054,1541,2640,2641,2642,  # 512, 256
+)
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euckrprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euckrprober.py
new file mode 100644
index 0000000..345a060
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euckrprober.py
@@ -0,0 +1,47 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import EUCKRDistributionAnalysis
+from .mbcssm import EUCKR_SM_MODEL
+
+
+class EUCKRProber(MultiByteCharSetProber):
+    def __init__(self):
+        super(EUCKRProber, self).__init__()
+        self.coding_sm = CodingStateMachine(EUCKR_SM_MODEL)
+        self.distribution_analyzer = EUCKRDistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "EUC-KR"
+
+    @property
+    def language(self):
+        return "Korean"
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euctwfreq.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euctwfreq.py
new file mode 100644
index 0000000..ed7a995
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euctwfreq.py
@@ -0,0 +1,387 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# EUCTW frequency table
+# Converted from big5 work
+# by Taiwan's Mandarin Promotion Council
+# <http:#www.edu.tw:81/mandr/>
+
+# 128  --> 0.42261
+# 256  --> 0.57851
+# 512  --> 0.74851
+# 1024 --> 0.89384
+# 2048 --> 0.97583
+#
+# Idea Distribution Ratio = 0.74851/(1-0.74851) =2.98
+# Random Distribution Ration = 512/(5401-512)=0.105
+#
+# Typical Distribution Ratio about 25% of Ideal one, still much higher than RDR
+
+EUCTW_TYPICAL_DISTRIBUTION_RATIO = 0.75
+
+# Char to FreqOrder table ,
+EUCTW_TABLE_SIZE = 5376
+
+EUCTW_CHAR_TO_FREQ_ORDER = (
+   1,1800,1506, 255,1431, 198,   9,  82,   6,7310, 177, 202,3615,1256,2808, 110,  # 2742
+3735,  33,3241, 261,  76,  44,2113,  16,2931,2184,1176, 659,3868,  26,3404,2643,  # 2758
+1198,3869,3313,4060, 410,2211, 302, 590, 361,1963,   8, 204,  58,4296,7311,1931,  # 2774
+  63,7312,7313, 317,1614,  75, 222, 159,4061,2412,1480,7314,3500,3068, 224,2809,  # 2790
+3616,   3,  10,3870,1471,  29,2774,1135,2852,1939, 873, 130,3242,1123, 312,7315,  # 2806
+4297,2051, 507, 252, 682,7316, 142,1914, 124, 206,2932,  34,3501,3173,  64, 604,  # 2822
+7317,2494,1976,1977, 155,1990, 645, 641,1606,7318,3405, 337,  72, 406,7319,  80,  # 2838
+ 630, 238,3174,1509, 263, 939,1092,2644, 756,1440,1094,3406, 449,  69,2969, 591,  # 2854
+ 179,2095, 471, 115,2034,1843,  60,  50,2970, 134, 806,1868, 734,2035,3407, 180,  # 2870
+ 995,1607, 156, 537,2893, 688,7320, 319,1305, 779,2144, 514,2374, 298,4298, 359,  # 2886
+2495,  90,2707,1338, 663,  11, 906,1099,2545,  20,2436, 182, 532,1716,7321, 732,  # 2902
+1376,4062,1311,1420,3175,  25,2312,1056, 113, 399, 382,1949, 242,3408,2467, 529,  # 2918
+3243, 475,1447,3617,7322, 117,  21, 656, 810,1297,2295,2329,3502,7323, 126,4063,  # 2934
+ 706, 456, 150, 613,4299,  71,1118,2036,4064, 145,3069,  85, 835, 486,2114,1246,  # 2950
+1426, 428, 727,1285,1015, 800, 106, 623, 303,1281,7324,2127,2354, 347,3736, 221,  # 2966
+3503,3110,7325,1955,1153,4065,  83, 296,1199,3070, 192, 624,  93,7326, 822,1897,  # 2982
+2810,3111, 795,2064, 991,1554,1542,1592,  27,  43,2853, 859, 139,1456, 860,4300,  # 2998
+ 437, 712,3871, 164,2392,3112, 695, 211,3017,2096, 195,3872,1608,3504,3505,3618,  # 3014
+3873, 234, 811,2971,2097,3874,2229,1441,3506,1615,2375, 668,2076,1638, 305, 228,  # 3030
+1664,4301, 467, 415,7327, 262,2098,1593, 239, 108, 300, 200,1033, 512,1247,2077,  # 3046
+7328,7329,2173,3176,3619,2673, 593, 845,1062,3244,  88,1723,2037,3875,1950, 212,  # 3062
+ 266, 152, 149, 468,1898,4066,4302,  77, 187,7330,3018,  37,   5,2972,7331,3876,  # 3078
+7332,7333,  39,2517,4303,2894,3177,2078,  55, 148,  74,4304, 545, 483,1474,1029,  # 3094
+1665, 217,1869,1531,3113,1104,2645,4067,  24, 172,3507, 900,3877,3508,3509,4305,  # 3110
+  32,1408,2811,1312, 329, 487,2355,2247,2708, 784,2674,   4,3019,3314,1427,1788,  # 3126
+ 188, 109, 499,7334,3620,1717,1789, 888,1217,3020,4306,7335,3510,7336,3315,1520,  # 3142
+3621,3878, 196,1034, 775,7337,7338, 929,1815, 249, 439,  38,7339,1063,7340, 794,  # 3158
+3879,1435,2296,  46, 178,3245,2065,7341,2376,7342, 214,1709,4307, 804,  35, 707,  # 3174
+ 324,3622,1601,2546, 140, 459,4068,7343,7344,1365, 839, 272, 978,2257,2572,3409,  # 3190
+2128,1363,3623,1423, 697, 100,3071,  48,  70,1231, 495,3114,2193,7345,1294,7346,  # 3206
+2079, 462, 586,1042,3246, 853, 256, 988, 185,2377,3410,1698, 434,1084,7347,3411,  # 3222
+ 314,2615,2775,4308,2330,2331, 569,2280, 637,1816,2518, 757,1162,1878,1616,3412,  # 3238
+ 287,1577,2115, 768,4309,1671,2854,3511,2519,1321,3737, 909,2413,7348,4069, 933,  # 3254
+3738,7349,2052,2356,1222,4310, 765,2414,1322, 786,4311,7350,1919,1462,1677,2895,  # 3270
+1699,7351,4312,1424,2437,3115,3624,2590,3316,1774,1940,3413,3880,4070, 309,1369,  # 3286
+1130,2812, 364,2230,1653,1299,3881,3512,3882,3883,2646, 525,1085,3021, 902,2000,  # 3302
+1475, 964,4313, 421,1844,1415,1057,2281, 940,1364,3116, 376,4314,4315,1381,   7,  # 3318
+2520, 983,2378, 336,1710,2675,1845, 321,3414, 559,1131,3022,2742,1808,1132,1313,  # 3334
+ 265,1481,1857,7352, 352,1203,2813,3247, 167,1089, 420,2814, 776, 792,1724,3513,  # 3350
+4071,2438,3248,7353,4072,7354, 446, 229, 333,2743, 901,3739,1200,1557,4316,2647,  # 3366
+1920, 395,2744,2676,3740,4073,1835, 125, 916,3178,2616,4317,7355,7356,3741,7357,  # 3382
+7358,7359,4318,3117,3625,1133,2547,1757,3415,1510,2313,1409,3514,7360,2145, 438,  # 3398
+2591,2896,2379,3317,1068, 958,3023, 461, 311,2855,2677,4074,1915,3179,4075,1978,  # 3414
+ 383, 750,2745,2617,4076, 274, 539, 385,1278,1442,7361,1154,1964, 384, 561, 210,  # 3430
+  98,1295,2548,3515,7362,1711,2415,1482,3416,3884,2897,1257, 129,7363,3742, 642,  # 3446
+ 523,2776,2777,2648,7364, 141,2231,1333,  68, 176, 441, 876, 907,4077, 603,2592,  # 3462
+ 710, 171,3417, 404, 549,  18,3118,2393,1410,3626,1666,7365,3516,4319,2898,4320,  # 3478
+7366,2973, 368,7367, 146, 366,  99, 871,3627,1543, 748, 807,1586,1185,  22,2258,  # 3494
+ 379,3743,3180,7368,3181, 505,1941,2618,1991,1382,2314,7369, 380,2357, 218, 702,  # 3510
+1817,1248,3418,3024,3517,3318,3249,7370,2974,3628, 930,3250,3744,7371,  59,7372,  # 3526
+ 585, 601,4078, 497,3419,1112,1314,4321,1801,7373,1223,1472,2174,7374, 749,1836,  # 3542
+ 690,1899,3745,1772,3885,1476, 429,1043,1790,2232,2116, 917,4079, 447,1086,1629,  # 3558
+7375, 556,7376,7377,2020,1654, 844,1090, 105, 550, 966,1758,2815,1008,1782, 686,  # 3574
+1095,7378,2282, 793,1602,7379,3518,2593,4322,4080,2933,2297,4323,3746, 980,2496,  # 3590
+ 544, 353, 527,4324, 908,2678,2899,7380, 381,2619,1942,1348,7381,1341,1252, 560,  # 3606
+3072,7382,3420,2856,7383,2053, 973, 886,2080, 143,4325,7384,7385, 157,3886, 496,  # 3622
+4081,  57, 840, 540,2038,4326,4327,3421,2117,1445, 970,2259,1748,1965,2081,4082,  # 3638
+3119,1234,1775,3251,2816,3629, 773,1206,2129,1066,2039,1326,3887,1738,1725,4083,  # 3654
+ 279,3120,  51,1544,2594, 423,1578,2130,2066, 173,4328,1879,7386,7387,1583, 264,  # 3670
+ 610,3630,4329,2439, 280, 154,7388,7389,7390,1739, 338,1282,3073, 693,2857,1411,  # 3686
+1074,3747,2440,7391,4330,7392,7393,1240, 952,2394,7394,2900,1538,2679, 685,1483,  # 3702
+4084,2468,1436, 953,4085,2054,4331, 671,2395,  79,4086,2441,3252, 608, 567,2680,  # 3718
+3422,4087,4088,1691, 393,1261,1791,2396,7395,4332,7396,7397,7398,7399,1383,1672,  # 3734
+3748,3182,1464, 522,1119, 661,1150, 216, 675,4333,3888,1432,3519, 609,4334,2681,  # 3750
+2397,7400,7401,7402,4089,3025,   0,7403,2469, 315, 231,2442, 301,3319,4335,2380,  # 3766
+7404, 233,4090,3631,1818,4336,4337,7405,  96,1776,1315,2082,7406, 257,7407,1809,  # 3782
+3632,2709,1139,1819,4091,2021,1124,2163,2778,1777,2649,7408,3074, 363,1655,3183,  # 3798
+7409,2975,7410,7411,7412,3889,1567,3890, 718, 103,3184, 849,1443, 341,3320,2934,  # 3814
+1484,7413,1712, 127,  67, 339,4092,2398, 679,1412, 821,7414,7415, 834, 738, 351,  # 3830
+2976,2146, 846, 235,1497,1880, 418,1992,3749,2710, 186,1100,2147,2746,3520,1545,  # 3846
+1355,2935,2858,1377, 583,3891,4093,2573,2977,7416,1298,3633,1078,2549,3634,2358,  # 3862
+  78,3750,3751, 267,1289,2099,2001,1594,4094, 348, 369,1274,2194,2175,1837,4338,  # 3878
+1820,2817,3635,2747,2283,2002,4339,2936,2748, 144,3321, 882,4340,3892,2749,3423,  # 3894
+4341,2901,7417,4095,1726, 320,7418,3893,3026, 788,2978,7419,2818,1773,1327,2859,  # 3910
+3894,2819,7420,1306,4342,2003,1700,3752,3521,2359,2650, 787,2022, 506, 824,3636,  # 3926
+ 534, 323,4343,1044,3322,2023,1900, 946,3424,7421,1778,1500,1678,7422,1881,4344,  # 3942
+ 165, 243,4345,3637,2521, 123, 683,4096, 764,4346,  36,3895,1792, 589,2902, 816,  # 3958
+ 626,1667,3027,2233,1639,1555,1622,3753,3896,7423,3897,2860,1370,1228,1932, 891,  # 3974
+2083,2903, 304,4097,7424, 292,2979,2711,3522, 691,2100,4098,1115,4347, 118, 662,  # 3990
+7425, 611,1156, 854,2381,1316,2861,   2, 386, 515,2904,7426,7427,3253, 868,2234,  # 4006
+1486, 855,2651, 785,2212,3028,7428,1040,3185,3523,7429,3121, 448,7430,1525,7431,  # 4022
+2164,4348,7432,3754,7433,4099,2820,3524,3122, 503, 818,3898,3123,1568, 814, 676,  # 4038
+1444, 306,1749,7434,3755,1416,1030, 197,1428, 805,2821,1501,4349,7435,7436,7437,  # 4054
+1993,7438,4350,7439,7440,2195,  13,2779,3638,2980,3124,1229,1916,7441,3756,2131,  # 4070
+7442,4100,4351,2399,3525,7443,2213,1511,1727,1120,7444,7445, 646,3757,2443, 307,  # 4086
+7446,7447,1595,3186,7448,7449,7450,3639,1113,1356,3899,1465,2522,2523,7451, 519,  # 4102
+7452, 128,2132,  92,2284,1979,7453,3900,1512, 342,3125,2196,7454,2780,2214,1980,  # 4118
+3323,7455, 290,1656,1317, 789, 827,2360,7456,3758,4352, 562, 581,3901,7457, 401,  # 4134
+4353,2248,  94,4354,1399,2781,7458,1463,2024,4355,3187,1943,7459, 828,1105,4101,  # 4150
+1262,1394,7460,4102, 605,4356,7461,1783,2862,7462,2822, 819,2101, 578,2197,2937,  # 4166
+7463,1502, 436,3254,4103,3255,2823,3902,2905,3425,3426,7464,2712,2315,7465,7466,  # 4182
+2332,2067,  23,4357, 193, 826,3759,2102, 699,1630,4104,3075, 390,1793,1064,3526,  # 4198
+7467,1579,3076,3077,1400,7468,4105,1838,1640,2863,7469,4358,4359, 137,4106, 598,  # 4214
+3078,1966, 780, 104, 974,2938,7470, 278, 899, 253, 402, 572, 504, 493,1339,7471,  # 4230
+3903,1275,4360,2574,2550,7472,3640,3029,3079,2249, 565,1334,2713, 863,  41,7473,  # 4246
+7474,4361,7475,1657,2333,  19, 463,2750,4107, 606,7476,2981,3256,1087,2084,1323,  # 4262
+2652,2982,7477,1631,1623,1750,4108,2682,7478,2864, 791,2714,2653,2334, 232,2416,  # 4278
+7479,2983,1498,7480,2654,2620, 755,1366,3641,3257,3126,2025,1609, 119,1917,3427,  # 4294
+ 862,1026,4109,7481,3904,3760,4362,3905,4363,2260,1951,2470,7482,1125, 817,4110,  # 4310
+4111,3906,1513,1766,2040,1487,4112,3030,3258,2824,3761,3127,7483,7484,1507,7485,  # 4326
+2683, 733,  40,1632,1106,2865, 345,4113, 841,2524, 230,4364,2984,1846,3259,3428,  # 4342
+7486,1263, 986,3429,7487, 735, 879, 254,1137, 857, 622,1300,1180,1388,1562,3907,  # 4358
+3908,2939, 967,2751,2655,1349, 592,2133,1692,3324,2985,1994,4114,1679,3909,1901,  # 4374
+2185,7488, 739,3642,2715,1296,1290,7489,4115,2198,2199,1921,1563,2595,2551,1870,  # 4390
+2752,2986,7490, 435,7491, 343,1108, 596,  17,1751,4365,2235,3430,3643,7492,4366,  # 4406
+ 294,3527,2940,1693, 477, 979, 281,2041,3528, 643,2042,3644,2621,2782,2261,1031,  # 4422
+2335,2134,2298,3529,4367, 367,1249,2552,7493,3530,7494,4368,1283,3325,2004, 240,  # 4438
+1762,3326,4369,4370, 836,1069,3128, 474,7495,2148,2525, 268,3531,7496,3188,1521,  # 4454
+1284,7497,1658,1546,4116,7498,3532,3533,7499,4117,3327,2684,1685,4118, 961,1673,  # 4470
+2622, 190,2005,2200,3762,4371,4372,7500, 570,2497,3645,1490,7501,4373,2623,3260,  # 4486
+1956,4374, 584,1514, 396,1045,1944,7502,4375,1967,2444,7503,7504,4376,3910, 619,  # 4502
+7505,3129,3261, 215,2006,2783,2553,3189,4377,3190,4378, 763,4119,3763,4379,7506,  # 4518
+7507,1957,1767,2941,3328,3646,1174, 452,1477,4380,3329,3130,7508,2825,1253,2382,  # 4534
+2186,1091,2285,4120, 492,7509, 638,1169,1824,2135,1752,3911, 648, 926,1021,1324,  # 4550
+4381, 520,4382, 997, 847,1007, 892,4383,3764,2262,1871,3647,7510,2400,1784,4384,  # 4566
+1952,2942,3080,3191,1728,4121,2043,3648,4385,2007,1701,3131,1551,  30,2263,4122,  # 4582
+7511,2026,4386,3534,7512, 501,7513,4123, 594,3431,2165,1821,3535,3432,3536,3192,  # 4598
+ 829,2826,4124,7514,1680,3132,1225,4125,7515,3262,4387,4126,3133,2336,7516,4388,  # 4614
+4127,7517,3912,3913,7518,1847,2383,2596,3330,7519,4389, 374,3914, 652,4128,4129,  # 4630
+ 375,1140, 798,7520,7521,7522,2361,4390,2264, 546,1659, 138,3031,2445,4391,7523,  # 4646
+2250, 612,1848, 910, 796,3765,1740,1371, 825,3766,3767,7524,2906,2554,7525, 692,  # 4662
+ 444,3032,2624, 801,4392,4130,7526,1491, 244,1053,3033,4131,4132, 340,7527,3915,  # 4678
+1041,2987, 293,1168,  87,1357,7528,1539, 959,7529,2236, 721, 694,4133,3768, 219,  # 4694
+1478, 644,1417,3331,2656,1413,1401,1335,1389,3916,7530,7531,2988,2362,3134,1825,  # 4710
+ 730,1515, 184,2827,  66,4393,7532,1660,2943, 246,3332, 378,1457, 226,3433, 975,  # 4726
+3917,2944,1264,3537, 674, 696,7533, 163,7534,1141,2417,2166, 713,3538,3333,4394,  # 4742
+3918,7535,7536,1186,  15,7537,1079,1070,7538,1522,3193,3539, 276,1050,2716, 758,  # 4758
+1126, 653,2945,3263,7539,2337, 889,3540,3919,3081,2989, 903,1250,4395,3920,3434,  # 4774
+3541,1342,1681,1718, 766,3264, 286,  89,2946,3649,7540,1713,7541,2597,3334,2990,  # 4790
+7542,2947,2215,3194,2866,7543,4396,2498,2526, 181, 387,1075,3921, 731,2187,3335,  # 4806
+7544,3265, 310, 313,3435,2299, 770,4134,  54,3034, 189,4397,3082,3769,3922,7545,  # 4822
+1230,1617,1849, 355,3542,4135,4398,3336, 111,4136,3650,1350,3135,3436,3035,4137,  # 4838
+2149,3266,3543,7546,2784,3923,3924,2991, 722,2008,7547,1071, 247,1207,2338,2471,  # 4854
+1378,4399,2009, 864,1437,1214,4400, 373,3770,1142,2216, 667,4401, 442,2753,2555,  # 4870
+3771,3925,1968,4138,3267,1839, 837, 170,1107, 934,1336,1882,7548,7549,2118,4139,  # 4886
+2828, 743,1569,7550,4402,4140, 582,2384,1418,3437,7551,1802,7552, 357,1395,1729,  # 4902
+3651,3268,2418,1564,2237,7553,3083,3772,1633,4403,1114,2085,4141,1532,7554, 482,  # 4918
+2446,4404,7555,7556,1492, 833,1466,7557,2717,3544,1641,2829,7558,1526,1272,3652,  # 4934
+4142,1686,1794, 416,2556,1902,1953,1803,7559,3773,2785,3774,1159,2316,7560,2867,  # 4950
+4405,1610,1584,3036,2419,2754, 443,3269,1163,3136,7561,7562,3926,7563,4143,2499,  # 4966
+3037,4406,3927,3137,2103,1647,3545,2010,1872,4144,7564,4145, 431,3438,7565, 250,  # 4982
+  97,  81,4146,7566,1648,1850,1558, 160, 848,7567, 866, 740,1694,7568,2201,2830,  # 4998
+3195,4147,4407,3653,1687, 950,2472, 426, 469,3196,3654,3655,3928,7569,7570,1188,  # 5014
+ 424,1995, 861,3546,4148,3775,2202,2685, 168,1235,3547,4149,7571,2086,1674,4408,  # 5030
+3337,3270, 220,2557,1009,7572,3776, 670,2992, 332,1208, 717,7573,7574,3548,2447,  # 5046
+3929,3338,7575, 513,7576,1209,2868,3339,3138,4409,1080,7577,7578,7579,7580,2527,  # 5062
+3656,3549, 815,1587,3930,3931,7581,3550,3439,3777,1254,4410,1328,3038,1390,3932,  # 5078
+1741,3933,3778,3934,7582, 236,3779,2448,3271,7583,7584,3657,3780,1273,3781,4411,  # 5094
+7585, 308,7586,4412, 245,4413,1851,2473,1307,2575, 430, 715,2136,2449,7587, 270,  # 5110
+ 199,2869,3935,7588,3551,2718,1753, 761,1754, 725,1661,1840,4414,3440,3658,7589,  # 5126
+7590, 587,  14,3272, 227,2598, 326, 480,2265, 943,2755,3552, 291, 650,1883,7591,  # 5142
+1702,1226, 102,1547,  62,3441, 904,4415,3442,1164,4150,7592,7593,1224,1548,2756,  # 5158
+ 391, 498,1493,7594,1386,1419,7595,2055,1177,4416, 813, 880,1081,2363, 566,1145,  # 5174
+4417,2286,1001,1035,2558,2599,2238, 394,1286,7596,7597,2068,7598,  86,1494,1730,  # 5190
+3936, 491,1588, 745, 897,2948, 843,3340,3937,2757,2870,3273,1768, 998,2217,2069,  # 5206
+ 397,1826,1195,1969,3659,2993,3341, 284,7599,3782,2500,2137,2119,1903,7600,3938,  # 5222
+2150,3939,4151,1036,3443,1904, 114,2559,4152, 209,1527,7601,7602,2949,2831,2625,  # 5238
+2385,2719,3139, 812,2560,7603,3274,7604,1559, 737,1884,3660,1210, 885,  28,2686,  # 5254
+3553,3783,7605,4153,1004,1779,4418,7606, 346,1981,2218,2687,4419,3784,1742, 797,  # 5270
+1642,3940,1933,1072,1384,2151, 896,3941,3275,3661,3197,2871,3554,7607,2561,1958,  # 5286
+4420,2450,1785,7608,7609,7610,3942,4154,1005,1308,3662,4155,2720,4421,4422,1528,  # 5302
+2600, 161,1178,4156,1982, 987,4423,1101,4157, 631,3943,1157,3198,2420,1343,1241,  # 5318
+1016,2239,2562, 372, 877,2339,2501,1160, 555,1934, 911,3944,7611, 466,1170, 169,  # 5334
+1051,2907,2688,3663,2474,2994,1182,2011,2563,1251,2626,7612, 992,2340,3444,1540,  # 5350
+2721,1201,2070,2401,1996,2475,7613,4424, 528,1922,2188,1503,1873,1570,2364,3342,  # 5366
+3276,7614, 557,1073,7615,1827,3445,2087,2266,3140,3039,3084, 767,3085,2786,4425,  # 5382
+1006,4158,4426,2341,1267,2176,3664,3199, 778,3945,3200,2722,1597,2657,7616,4427,  # 5398
+7617,3446,7618,7619,7620,3277,2689,1433,3278, 131,  95,1504,3946, 723,4159,3141,  # 5414
+1841,3555,2758,2189,3947,2027,2104,3665,7621,2995,3948,1218,7622,3343,3201,3949,  # 5430
+4160,2576, 248,1634,3785, 912,7623,2832,3666,3040,3786, 654,  53,7624,2996,7625,  # 5446
+1688,4428, 777,3447,1032,3950,1425,7626, 191, 820,2120,2833, 971,4429, 931,3202,  # 5462
+ 135, 664, 783,3787,1997, 772,2908,1935,3951,3788,4430,2909,3203, 282,2723, 640,  # 5478
+1372,3448,1127, 922, 325,3344,7627,7628, 711,2044,7629,7630,3952,2219,2787,1936,  # 5494
+3953,3345,2220,2251,3789,2300,7631,4431,3790,1258,3279,3954,3204,2138,2950,3955,  # 5510
+3956,7632,2221, 258,3205,4432, 101,1227,7633,3280,1755,7634,1391,3281,7635,2910,  # 5526
+2056, 893,7636,7637,7638,1402,4161,2342,7639,7640,3206,3556,7641,7642, 878,1325,  # 5542
+1780,2788,4433, 259,1385,2577, 744,1183,2267,4434,7643,3957,2502,7644, 684,1024,  # 5558
+4162,7645, 472,3557,3449,1165,3282,3958,3959, 322,2152, 881, 455,1695,1152,1340,  # 5574
+ 660, 554,2153,4435,1058,4436,4163, 830,1065,3346,3960,4437,1923,7646,1703,1918,  # 5590
+7647, 932,2268, 122,7648,4438, 947, 677,7649,3791,2627, 297,1905,1924,2269,4439,  # 5606
+2317,3283,7650,7651,4164,7652,4165,  84,4166, 112, 989,7653, 547,1059,3961, 701,  # 5622
+3558,1019,7654,4167,7655,3450, 942, 639, 457,2301,2451, 993,2951, 407, 851, 494,  # 5638
+4440,3347, 927,7656,1237,7657,2421,3348, 573,4168, 680, 921,2911,1279,1874, 285,  # 5654
+ 790,1448,1983, 719,2167,7658,7659,4441,3962,3963,1649,7660,1541, 563,7661,1077,  # 5670
+7662,3349,3041,3451, 511,2997,3964,3965,3667,3966,1268,2564,3350,3207,4442,4443,  # 5686
+7663, 535,1048,1276,1189,2912,2028,3142,1438,1373,2834,2952,1134,2012,7664,4169,  # 5702
+1238,2578,3086,1259,7665, 700,7666,2953,3143,3668,4170,7667,4171,1146,1875,1906,  # 5718
+4444,2601,3967, 781,2422, 132,1589, 203, 147, 273,2789,2402, 898,1786,2154,3968,  # 5734
+3969,7668,3792,2790,7669,7670,4445,4446,7671,3208,7672,1635,3793, 965,7673,1804,  # 5750
+2690,1516,3559,1121,1082,1329,3284,3970,1449,3794,  65,1128,2835,2913,2759,1590,  # 5766
+3795,7674,7675,  12,2658,  45, 976,2579,3144,4447, 517,2528,1013,1037,3209,7676,  # 5782
+3796,2836,7677,3797,7678,3452,7679,2602, 614,1998,2318,3798,3087,2724,2628,7680,  # 5798
+2580,4172, 599,1269,7681,1810,3669,7682,2691,3088, 759,1060, 489,1805,3351,3285,  # 5814
+1358,7683,7684,2386,1387,1215,2629,2252, 490,7685,7686,4173,1759,2387,2343,7687,  # 5830
+4448,3799,1907,3971,2630,1806,3210,4449,3453,3286,2760,2344, 874,7688,7689,3454,  # 5846
+3670,1858,  91,2914,3671,3042,3800,4450,7690,3145,3972,2659,7691,3455,1202,1403,  # 5862
+3801,2954,2529,1517,2503,4451,3456,2504,7692,4452,7693,2692,1885,1495,1731,3973,  # 5878
+2365,4453,7694,2029,7695,7696,3974,2693,1216, 237,2581,4174,2319,3975,3802,4454,  # 5894
+4455,2694,3560,3457, 445,4456,7697,7698,7699,7700,2761,  61,3976,3672,1822,3977,  # 5910
+7701, 687,2045, 935, 925, 405,2660, 703,1096,1859,2725,4457,3978,1876,1367,2695,  # 5926
+3352, 918,2105,1781,2476, 334,3287,1611,1093,4458, 564,3146,3458,3673,3353, 945,  # 5942
+2631,2057,4459,7702,1925, 872,4175,7703,3459,2696,3089, 349,4176,3674,3979,4460,  # 5958
+3803,4177,3675,2155,3980,4461,4462,4178,4463,2403,2046, 782,3981, 400, 251,4179,  # 5974
+1624,7704,7705, 277,3676, 299,1265, 476,1191,3804,2121,4180,4181,1109, 205,7706,  # 5990
+2582,1000,2156,3561,1860,7707,7708,7709,4464,7710,4465,2565, 107,2477,2157,3982,  # 6006
+3460,3147,7711,1533, 541,1301, 158, 753,4182,2872,3562,7712,1696, 370,1088,4183,  # 6022
+4466,3563, 579, 327, 440, 162,2240, 269,1937,1374,3461, 968,3043,  56,1396,3090,  # 6038
+2106,3288,3354,7713,1926,2158,4467,2998,7714,3564,7715,7716,3677,4468,2478,7717,  # 6054
+2791,7718,1650,4469,7719,2603,7720,7721,3983,2661,3355,1149,3356,3984,3805,3985,  # 6070
+7722,1076,  49,7723, 951,3211,3289,3290, 450,2837, 920,7724,1811,2792,2366,4184,  # 6086
+1908,1138,2367,3806,3462,7725,3212,4470,1909,1147,1518,2423,4471,3807,7726,4472,  # 6102
+2388,2604, 260,1795,3213,7727,7728,3808,3291, 708,7729,3565,1704,7730,3566,1351,  # 6118
+1618,3357,2999,1886, 944,4185,3358,4186,3044,3359,4187,7731,3678, 422, 413,1714,  # 6134
+3292, 500,2058,2345,4188,2479,7732,1344,1910, 954,7733,1668,7734,7735,3986,2404,  # 6150
+4189,3567,3809,4190,7736,2302,1318,2505,3091, 133,3092,2873,4473, 629,  31,2838,  # 6166
+2697,3810,4474, 850, 949,4475,3987,2955,1732,2088,4191,1496,1852,7737,3988, 620,  # 6182
+3214, 981,1242,3679,3360,1619,3680,1643,3293,2139,2452,1970,1719,3463,2168,7738,  # 6198
+3215,7739,7740,3361,1828,7741,1277,4476,1565,2047,7742,1636,3568,3093,7743, 869,  # 6214
+2839, 655,3811,3812,3094,3989,3000,3813,1310,3569,4477,7744,7745,7746,1733, 558,  # 6230
+4478,3681, 335,1549,3045,1756,4192,3682,1945,3464,1829,1291,1192, 470,2726,2107,  # 6246
+2793, 913,1054,3990,7747,1027,7748,3046,3991,4479, 982,2662,3362,3148,3465,3216,  # 6262
+3217,1946,2794,7749, 571,4480,7750,1830,7751,3570,2583,1523,2424,7752,2089, 984,  # 6278
+4481,3683,1959,7753,3684, 852, 923,2795,3466,3685, 969,1519, 999,2048,2320,1705,  # 6294
+7754,3095, 615,1662, 151, 597,3992,2405,2321,1049, 275,4482,3686,4193, 568,3687,  # 6310
+3571,2480,4194,3688,7755,2425,2270, 409,3218,7756,1566,2874,3467,1002, 769,2840,  # 6326
+ 194,2090,3149,3689,2222,3294,4195, 628,1505,7757,7758,1763,2177,3001,3993, 521,  # 6342
+1161,2584,1787,2203,2406,4483,3994,1625,4196,4197, 412,  42,3096, 464,7759,2632,  # 6358
+4484,3363,1760,1571,2875,3468,2530,1219,2204,3814,2633,2140,2368,4485,4486,3295,  # 6374
+1651,3364,3572,7760,7761,3573,2481,3469,7762,3690,7763,7764,2271,2091, 460,7765,  # 6390
+4487,7766,3002, 962, 588,3574, 289,3219,2634,1116,  52,7767,3047,1796,7768,7769,  # 6406
+7770,1467,7771,1598,1143,3691,4198,1984,1734,1067,4488,1280,3365, 465,4489,1572,  # 6422
+ 510,7772,1927,2241,1812,1644,3575,7773,4490,3692,7774,7775,2663,1573,1534,7776,  # 6438
+7777,4199, 536,1807,1761,3470,3815,3150,2635,7778,7779,7780,4491,3471,2915,1911,  # 6454
+2796,7781,3296,1122, 377,3220,7782, 360,7783,7784,4200,1529, 551,7785,2059,3693,  # 6470
+1769,2426,7786,2916,4201,3297,3097,2322,2108,2030,4492,1404, 136,1468,1479, 672,  # 6486
+1171,3221,2303, 271,3151,7787,2762,7788,2049, 678,2727, 865,1947,4493,7789,2013,  # 6502
+3995,2956,7790,2728,2223,1397,3048,3694,4494,4495,1735,2917,3366,3576,7791,3816,  # 6518
+ 509,2841,2453,2876,3817,7792,7793,3152,3153,4496,4202,2531,4497,2304,1166,1010,  # 6534
+ 552, 681,1887,7794,7795,2957,2958,3996,1287,1596,1861,3154, 358, 453, 736, 175,  # 6550
+ 478,1117, 905,1167,1097,7796,1853,1530,7797,1706,7798,2178,3472,2287,3695,3473,  # 6566
+3577,4203,2092,4204,7799,3367,1193,2482,4205,1458,2190,2205,1862,1888,1421,3298,  # 6582
+2918,3049,2179,3474, 595,2122,7800,3997,7801,7802,4206,1707,2636, 223,3696,1359,  # 6598
+ 751,3098, 183,3475,7803,2797,3003, 419,2369, 633, 704,3818,2389, 241,7804,7805,  # 6614
+7806, 838,3004,3697,2272,2763,2454,3819,1938,2050,3998,1309,3099,2242,1181,7807,  # 6630
+1136,2206,3820,2370,1446,4207,2305,4498,7808,7809,4208,1055,2605, 484,3698,7810,  # 6646
+3999, 625,4209,2273,3368,1499,4210,4000,7811,4001,4211,3222,2274,2275,3476,7812,  # 6662
+7813,2764, 808,2606,3699,3369,4002,4212,3100,2532, 526,3370,3821,4213, 955,7814,  # 6678
+1620,4214,2637,2427,7815,1429,3700,1669,1831, 994, 928,7816,3578,1260,7817,7818,  # 6694
+7819,1948,2288, 741,2919,1626,4215,2729,2455, 867,1184, 362,3371,1392,7820,7821,  # 6710
+4003,4216,1770,1736,3223,2920,4499,4500,1928,2698,1459,1158,7822,3050,3372,2877,  # 6726
+1292,1929,2506,2842,3701,1985,1187,2071,2014,2607,4217,7823,2566,2507,2169,3702,  # 6742
+2483,3299,7824,3703,4501,7825,7826, 666,1003,3005,1022,3579,4218,7827,4502,1813,  # 6758
+2253, 574,3822,1603, 295,1535, 705,3823,4219, 283, 858, 417,7828,7829,3224,4503,  # 6774
+4504,3051,1220,1889,1046,2276,2456,4004,1393,1599, 689,2567, 388,4220,7830,2484,  # 6790
+ 802,7831,2798,3824,2060,1405,2254,7832,4505,3825,2109,1052,1345,3225,1585,7833,  # 6806
+ 809,7834,7835,7836, 575,2730,3477, 956,1552,1469,1144,2323,7837,2324,1560,2457,  # 6822
+3580,3226,4005, 616,2207,3155,2180,2289,7838,1832,7839,3478,4506,7840,1319,3704,  # 6838
+3705,1211,3581,1023,3227,1293,2799,7841,7842,7843,3826, 607,2306,3827, 762,2878,  # 6854
+1439,4221,1360,7844,1485,3052,7845,4507,1038,4222,1450,2061,2638,4223,1379,4508,  # 6870
+2585,7846,7847,4224,1352,1414,2325,2921,1172,7848,7849,3828,3829,7850,1797,1451,  # 6886
+7851,7852,7853,7854,2922,4006,4007,2485,2346, 411,4008,4009,3582,3300,3101,4509,  # 6902
+1561,2664,1452,4010,1375,7855,7856,  47,2959, 316,7857,1406,1591,2923,3156,7858,  # 6918
+1025,2141,3102,3157, 354,2731, 884,2224,4225,2407, 508,3706, 726,3583, 996,2428,  # 6934
+3584, 729,7859, 392,2191,1453,4011,4510,3707,7860,7861,2458,3585,2608,1675,2800,  # 6950
+ 919,2347,2960,2348,1270,4511,4012,  73,7862,7863, 647,7864,3228,2843,2255,1550,  # 6966
+1346,3006,7865,1332, 883,3479,7866,7867,7868,7869,3301,2765,7870,1212, 831,1347,  # 6982
+4226,4512,2326,3830,1863,3053, 720,3831,4513,4514,3832,7871,4227,7872,7873,4515,  # 6998
+7874,7875,1798,4516,3708,2609,4517,3586,1645,2371,7876,7877,2924, 669,2208,2665,  # 7014
+2429,7878,2879,7879,7880,1028,3229,7881,4228,2408,7882,2256,1353,7883,7884,4518,  # 7030
+3158, 518,7885,4013,7886,4229,1960,7887,2142,4230,7888,7889,3007,2349,2350,3833,  # 7046
+ 516,1833,1454,4014,2699,4231,4519,2225,2610,1971,1129,3587,7890,2766,7891,2961,  # 7062
+1422, 577,1470,3008,1524,3373,7892,7893, 432,4232,3054,3480,7894,2586,1455,2508,  # 7078
+2226,1972,1175,7895,1020,2732,4015,3481,4520,7896,2733,7897,1743,1361,3055,3482,  # 7094
+2639,4016,4233,4521,2290, 895, 924,4234,2170, 331,2243,3056, 166,1627,3057,1098,  # 7110
+7898,1232,2880,2227,3374,4522, 657, 403,1196,2372, 542,3709,3375,1600,4235,3483,  # 7126
+7899,4523,2767,3230, 576, 530,1362,7900,4524,2533,2666,3710,4017,7901, 842,3834,  # 7142
+7902,2801,2031,1014,4018, 213,2700,3376, 665, 621,4236,7903,3711,2925,2430,7904,  # 7158
+2431,3302,3588,3377,7905,4237,2534,4238,4525,3589,1682,4239,3484,1380,7906, 724,  # 7174
+2277, 600,1670,7907,1337,1233,4526,3103,2244,7908,1621,4527,7909, 651,4240,7910,  # 7190
+1612,4241,2611,7911,2844,7912,2734,2307,3058,7913, 716,2459,3059, 174,1255,2701,  # 7206
+4019,3590, 548,1320,1398, 728,4020,1574,7914,1890,1197,3060,4021,7915,3061,3062,  # 7222
+3712,3591,3713, 747,7916, 635,4242,4528,7917,7918,7919,4243,7920,7921,4529,7922,  # 7238
+3378,4530,2432, 451,7923,3714,2535,2072,4244,2735,4245,4022,7924,1764,4531,7925,  # 7254
+4246, 350,7926,2278,2390,2486,7927,4247,4023,2245,1434,4024, 488,4532, 458,4248,  # 7270
+4025,3715, 771,1330,2391,3835,2568,3159,2159,2409,1553,2667,3160,4249,7928,2487,  # 7286
+2881,2612,1720,2702,4250,3379,4533,7929,2536,4251,7930,3231,4252,2768,7931,2015,  # 7302
+2736,7932,1155,1017,3716,3836,7933,3303,2308, 201,1864,4253,1430,7934,4026,7935,  # 7318
+7936,7937,7938,7939,4254,1604,7940, 414,1865, 371,2587,4534,4535,3485,2016,3104,  # 7334
+4536,1708, 960,4255, 887, 389,2171,1536,1663,1721,7941,2228,4027,2351,2926,1580,  # 7350
+7942,7943,7944,1744,7945,2537,4537,4538,7946,4539,7947,2073,7948,7949,3592,3380,  # 7366
+2882,4256,7950,4257,2640,3381,2802, 673,2703,2460, 709,3486,4028,3593,4258,7951,  # 7382
+1148, 502, 634,7952,7953,1204,4540,3594,1575,4541,2613,3717,7954,3718,3105, 948,  # 7398
+3232, 121,1745,3837,1110,7955,4259,3063,2509,3009,4029,3719,1151,1771,3838,1488,  # 7414
+4030,1986,7956,2433,3487,7957,7958,2093,7959,4260,3839,1213,1407,2803, 531,2737,  # 7430
+2538,3233,1011,1537,7960,2769,4261,3106,1061,7961,3720,3721,1866,2883,7962,2017,  # 7446
+ 120,4262,4263,2062,3595,3234,2309,3840,2668,3382,1954,4542,7963,7964,3488,1047,  # 7462
+2704,1266,7965,1368,4543,2845, 649,3383,3841,2539,2738,1102,2846,2669,7966,7967,  # 7478
+1999,7968,1111,3596,2962,7969,2488,3842,3597,2804,1854,3384,3722,7970,7971,3385,  # 7494
+2410,2884,3304,3235,3598,7972,2569,7973,3599,2805,4031,1460, 856,7974,3600,7975,  # 7510
+2885,2963,7976,2886,3843,7977,4264, 632,2510, 875,3844,1697,3845,2291,7978,7979,  # 7526
+4544,3010,1239, 580,4545,4265,7980, 914, 936,2074,1190,4032,1039,2123,7981,7982,  # 7542
+7983,3386,1473,7984,1354,4266,3846,7985,2172,3064,4033, 915,3305,4267,4268,3306,  # 7558
+1605,1834,7986,2739, 398,3601,4269,3847,4034, 328,1912,2847,4035,3848,1331,4270,  # 7574
+3011, 937,4271,7987,3602,4036,4037,3387,2160,4546,3388, 524, 742, 538,3065,1012,  # 7590
+7988,7989,3849,2461,7990, 658,1103, 225,3850,7991,7992,4547,7993,4548,7994,3236,  # 7606
+1243,7995,4038, 963,2246,4549,7996,2705,3603,3161,7997,7998,2588,2327,7999,4550,  # 7622
+8000,8001,8002,3489,3307, 957,3389,2540,2032,1930,2927,2462, 870,2018,3604,1746,  # 7638
+2770,2771,2434,2463,8003,3851,8004,3723,3107,3724,3490,3390,3725,8005,1179,3066,  # 7654
+8006,3162,2373,4272,3726,2541,3163,3108,2740,4039,8007,3391,1556,2542,2292, 977,  # 7670
+2887,2033,4040,1205,3392,8008,1765,3393,3164,2124,1271,1689, 714,4551,3491,8009,  # 7686
+2328,3852, 533,4273,3605,2181, 617,8010,2464,3308,3492,2310,8011,8012,3165,8013,  # 7702
+8014,3853,1987, 618, 427,2641,3493,3394,8015,8016,1244,1690,8017,2806,4274,4552,  # 7718
+8018,3494,8019,8020,2279,1576, 473,3606,4275,3395, 972,8021,3607,8022,3067,8023,  # 7734
+8024,4553,4554,8025,3727,4041,4042,8026, 153,4555, 356,8027,1891,2888,4276,2143,  # 7750
+ 408, 803,2352,8028,3854,8029,4277,1646,2570,2511,4556,4557,3855,8030,3856,4278,  # 7766
+8031,2411,3396, 752,8032,8033,1961,2964,8034, 746,3012,2465,8035,4279,3728, 698,  # 7782
+4558,1892,4280,3608,2543,4559,3609,3857,8036,3166,3397,8037,1823,1302,4043,2706,  # 7798
+3858,1973,4281,8038,4282,3167, 823,1303,1288,1236,2848,3495,4044,3398, 774,3859,  # 7814
+8039,1581,4560,1304,2849,3860,4561,8040,2435,2161,1083,3237,4283,4045,4284, 344,  # 7830
+1173, 288,2311, 454,1683,8041,8042,1461,4562,4046,2589,8043,8044,4563, 985, 894,  # 7846
+8045,3399,3168,8046,1913,2928,3729,1988,8047,2110,1974,8048,4047,8049,2571,1194,  # 7862
+ 425,8050,4564,3169,1245,3730,4285,8051,8052,2850,8053, 636,4565,1855,3861, 760,  # 7878
+1799,8054,4286,2209,1508,4566,4048,1893,1684,2293,8055,8056,8057,4287,4288,2210,  # 7894
+ 479,8058,8059, 832,8060,4049,2489,8061,2965,2490,3731, 990,3109, 627,1814,2642,  # 7910
+4289,1582,4290,2125,2111,3496,4567,8062, 799,4291,3170,8063,4568,2112,1737,3013,  # 7926
+1018, 543, 754,4292,3309,1676,4569,4570,4050,8064,1489,8065,3497,8066,2614,2889,  # 7942
+4051,8067,8068,2966,8069,8070,8071,8072,3171,4571,4572,2182,1722,8073,3238,3239,  # 7958
+1842,3610,1715, 481, 365,1975,1856,8074,8075,1962,2491,4573,8076,2126,3611,3240,  # 7974
+ 433,1894,2063,2075,8077, 602,2741,8078,8079,8080,8081,8082,3014,1628,3400,8083,  # 7990
+3172,4574,4052,2890,4575,2512,8084,2544,2772,8085,8086,8087,3310,4576,2891,8088,  # 8006
+4577,8089,2851,4578,4579,1221,2967,4053,2513,8090,8091,8092,1867,1989,8093,8094,  # 8022
+8095,1895,8096,8097,4580,1896,4054, 318,8098,2094,4055,4293,8099,8100, 485,8101,  # 8038
+ 938,3862, 553,2670, 116,8102,3863,3612,8103,3498,2671,2773,3401,3311,2807,8104,  # 8054
+3613,2929,4056,1747,2930,2968,8105,8106, 207,8107,8108,2672,4581,2514,8109,3015,  # 8070
+ 890,3614,3864,8110,1877,3732,3402,8111,2183,2353,3403,1652,8112,8113,8114, 941,  # 8086
+2294, 208,3499,4057,2019, 330,4294,3865,2892,2492,3733,4295,8115,8116,8117,8118,  # 8102
+)
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euctwprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euctwprober.py
new file mode 100644
index 0000000..35669cc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/euctwprober.py
@@ -0,0 +1,46 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import EUCTWDistributionAnalysis
+from .mbcssm import EUCTW_SM_MODEL
+
+class EUCTWProber(MultiByteCharSetProber):
+    def __init__(self):
+        super(EUCTWProber, self).__init__()
+        self.coding_sm = CodingStateMachine(EUCTW_SM_MODEL)
+        self.distribution_analyzer = EUCTWDistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "EUC-TW"
+
+    @property
+    def language(self):
+        return "Taiwan"
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/gb2312freq.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/gb2312freq.py
new file mode 100644
index 0000000..697837b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/gb2312freq.py
@@ -0,0 +1,283 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# GB2312 most frequently used character table
+#
+# Char to FreqOrder table , from hz6763
+
+# 512  --> 0.79  -- 0.79
+# 1024 --> 0.92  -- 0.13
+# 2048 --> 0.98  -- 0.06
+# 6768 --> 1.00  -- 0.02
+#
+# Ideal Distribution Ratio = 0.79135/(1-0.79135) = 3.79
+# Random Distribution Ration = 512 / (3755 - 512) = 0.157
+#
+# Typical Distribution Ratio about 25% of Ideal one, still much higher that RDR
+
+GB2312_TYPICAL_DISTRIBUTION_RATIO = 0.9
+
+GB2312_TABLE_SIZE = 3760
+
+GB2312_CHAR_TO_FREQ_ORDER = (
+1671, 749,1443,2364,3924,3807,2330,3921,1704,3463,2691,1511,1515, 572,3191,2205,
+2361, 224,2558, 479,1711, 963,3162, 440,4060,1905,2966,2947,3580,2647,3961,3842,
+2204, 869,4207, 970,2678,5626,2944,2956,1479,4048, 514,3595, 588,1346,2820,3409,
+ 249,4088,1746,1873,2047,1774, 581,1813, 358,1174,3590,1014,1561,4844,2245, 670,
+1636,3112, 889,1286, 953, 556,2327,3060,1290,3141, 613, 185,3477,1367, 850,3820,
+1715,2428,2642,2303,2732,3041,2562,2648,3566,3946,1349, 388,3098,2091,1360,3585,
+ 152,1687,1539, 738,1559,  59,1232,2925,2267,1388,1249,1741,1679,2960, 151,1566,
+1125,1352,4271, 924,4296, 385,3166,4459, 310,1245,2850,  70,3285,2729,3534,3575,
+2398,3298,3466,1960,2265, 217,3647, 864,1909,2084,4401,2773,1010,3269,5152, 853,
+3051,3121,1244,4251,1895, 364,1499,1540,2313,1180,3655,2268, 562, 715,2417,3061,
+ 544, 336,3768,2380,1752,4075, 950, 280,2425,4382, 183,2759,3272, 333,4297,2155,
+1688,2356,1444,1039,4540, 736,1177,3349,2443,2368,2144,2225, 565, 196,1482,3406,
+ 927,1335,4147, 692, 878,1311,1653,3911,3622,1378,4200,1840,2969,3149,2126,1816,
+2534,1546,2393,2760, 737,2494,  13, 447, 245,2747,  38,2765,2129,2589,1079, 606,
+ 360, 471,3755,2890, 404, 848, 699,1785,1236, 370,2221,1023,3746,2074,2026,2023,
+2388,1581,2119, 812,1141,3091,2536,1519, 804,2053, 406,1596,1090, 784, 548,4414,
+1806,2264,2936,1100, 343,4114,5096, 622,3358, 743,3668,1510,1626,5020,3567,2513,
+3195,4115,5627,2489,2991,  24,2065,2697,1087,2719,  48,1634, 315,  68, 985,2052,
+ 198,2239,1347,1107,1439, 597,2366,2172, 871,3307, 919,2487,2790,1867, 236,2570,
+1413,3794, 906,3365,3381,1701,1982,1818,1524,2924,1205, 616,2586,2072,2004, 575,
+ 253,3099,  32,1365,1182, 197,1714,2454,1201, 554,3388,3224,2748, 756,2587, 250,
+2567,1507,1517,3529,1922,2761,2337,3416,1961,1677,2452,2238,3153, 615, 911,1506,
+1474,2495,1265,1906,2749,3756,3280,2161, 898,2714,1759,3450,2243,2444, 563,  26,
+3286,2266,3769,3344,2707,3677, 611,1402, 531,1028,2871,4548,1375, 261,2948, 835,
+1190,4134, 353, 840,2684,1900,3082,1435,2109,1207,1674, 329,1872,2781,4055,2686,
+2104, 608,3318,2423,2957,2768,1108,3739,3512,3271,3985,2203,1771,3520,1418,2054,
+1681,1153, 225,1627,2929, 162,2050,2511,3687,1954, 124,1859,2431,1684,3032,2894,
+ 585,4805,3969,2869,2704,2088,2032,2095,3656,2635,4362,2209, 256, 518,2042,2105,
+3777,3657, 643,2298,1148,1779, 190, 989,3544, 414,  11,2135,2063,2979,1471, 403,
+3678, 126, 770,1563, 671,2499,3216,2877, 600,1179, 307,2805,4937,1268,1297,2694,
+ 252,4032,1448,1494,1331,1394, 127,2256, 222,1647,1035,1481,3056,1915,1048, 873,
+3651, 210,  33,1608,2516, 200,1520, 415, 102,   0,3389,1287, 817,  91,3299,2940,
+ 836,1814, 549,2197,1396,1669,2987,3582,2297,2848,4528,1070, 687,  20,1819, 121,
+1552,1364,1461,1968,2617,3540,2824,2083, 177, 948,4938,2291, 110,4549,2066, 648,
+3359,1755,2110,2114,4642,4845,1693,3937,3308,1257,1869,2123, 208,1804,3159,2992,
+2531,2549,3361,2418,1350,2347,2800,2568,1291,2036,2680,  72, 842,1990, 212,1233,
+1154,1586,  75,2027,3410,4900,1823,1337,2710,2676, 728,2810,1522,3026,4995, 157,
+ 755,1050,4022, 710, 785,1936,2194,2085,1406,2777,2400, 150,1250,4049,1206, 807,
+1910, 534, 529,3309,1721,1660, 274,  39,2827, 661,2670,1578, 925,3248,3815,1094,
+4278,4901,4252,  41,1150,3747,2572,2227,4501,3658,4902,3813,3357,3617,2884,2258,
+ 887, 538,4187,3199,1294,2439,3042,2329,2343,2497,1255, 107, 543,1527, 521,3478,
+3568, 194,5062,  15, 961,3870,1241,1192,2664,  66,5215,3260,2111,1295,1127,2152,
+3805,4135, 901,1164,1976, 398,1278, 530,1460, 748, 904,1054,1966,1426,  53,2909,
+ 509, 523,2279,1534, 536,1019, 239,1685, 460,2353, 673,1065,2401,3600,4298,2272,
+1272,2363, 284,1753,3679,4064,1695,  81, 815,2677,2757,2731,1386, 859, 500,4221,
+2190,2566, 757,1006,2519,2068,1166,1455, 337,2654,3203,1863,1682,1914,3025,1252,
+1409,1366, 847, 714,2834,2038,3209, 964,2970,1901, 885,2553,1078,1756,3049, 301,
+1572,3326, 688,2130,1996,2429,1805,1648,2930,3421,2750,3652,3088, 262,1158,1254,
+ 389,1641,1812, 526,1719, 923,2073,1073,1902, 468, 489,4625,1140, 857,2375,3070,
+3319,2863, 380, 116,1328,2693,1161,2244, 273,1212,1884,2769,3011,1775,1142, 461,
+3066,1200,2147,2212, 790, 702,2695,4222,1601,1058, 434,2338,5153,3640,  67,2360,
+4099,2502, 618,3472,1329, 416,1132, 830,2782,1807,2653,3211,3510,1662, 192,2124,
+ 296,3979,1739,1611,3684,  23, 118, 324, 446,1239,1225, 293,2520,3814,3795,2535,
+3116,  17,1074, 467,2692,2201, 387,2922,  45,1326,3055,1645,3659,2817, 958, 243,
+1903,2320,1339,2825,1784,3289, 356, 576, 865,2315,2381,3377,3916,1088,3122,1713,
+1655, 935, 628,4689,1034,1327, 441, 800, 720, 894,1979,2183,1528,5289,2702,1071,
+4046,3572,2399,1571,3281,  79, 761,1103, 327, 134, 758,1899,1371,1615, 879, 442,
+ 215,2605,2579, 173,2048,2485,1057,2975,3317,1097,2253,3801,4263,1403,1650,2946,
+ 814,4968,3487,1548,2644,1567,1285,   2, 295,2636,  97, 946,3576, 832, 141,4257,
+3273, 760,3821,3521,3156,2607, 949,1024,1733,1516,1803,1920,2125,2283,2665,3180,
+1501,2064,3560,2171,1592, 803,3518,1416, 732,3897,4258,1363,1362,2458, 119,1427,
+ 602,1525,2608,1605,1639,3175, 694,3064,  10, 465,  76,2000,4846,4208, 444,3781,
+1619,3353,2206,1273,3796, 740,2483, 320,1723,2377,3660,2619,1359,1137,1762,1724,
+2345,2842,1850,1862, 912, 821,1866, 612,2625,1735,2573,3369,1093, 844,  89, 937,
+ 930,1424,3564,2413,2972,1004,3046,3019,2011, 711,3171,1452,4178, 428, 801,1943,
+ 432, 445,2811, 206,4136,1472, 730, 349,  73, 397,2802,2547, 998,1637,1167, 789,
+ 396,3217, 154,1218, 716,1120,1780,2819,4826,1931,3334,3762,2139,1215,2627, 552,
+3664,3628,3232,1405,2383,3111,1356,2652,3577,3320,3101,1703, 640,1045,1370,1246,
+4996, 371,1575,2436,1621,2210, 984,4033,1734,2638,  16,4529, 663,2755,3255,1451,
+3917,2257,1253,1955,2234,1263,2951, 214,1229, 617, 485, 359,1831,1969, 473,2310,
+ 750,2058, 165,  80,2864,2419, 361,4344,2416,2479,1134, 796,3726,1266,2943, 860,
+2715, 938, 390,2734,1313,1384, 248, 202, 877,1064,2854, 522,3907, 279,1602, 297,
+2357, 395,3740, 137,2075, 944,4089,2584,1267,3802,  62,1533,2285, 178, 176, 780,
+2440, 201,3707, 590, 478,1560,4354,2117,1075,  30,  74,4643,4004,1635,1441,2745,
+ 776,2596, 238,1077,1692,1912,2844, 605, 499,1742,3947, 241,3053, 980,1749, 936,
+2640,4511,2582, 515,1543,2162,5322,2892,2993, 890,2148,1924, 665,1827,3581,1032,
+ 968,3163, 339,1044,1896, 270, 583,1791,1720,4367,1194,3488,3669,  43,2523,1657,
+ 163,2167, 290,1209,1622,3378, 550, 634,2508,2510, 695,2634,2384,2512,1476,1414,
+ 220,1469,2341,2138,2852,3183,2900,4939,2865,3502,1211,3680, 854,3227,1299,2976,
+3172, 186,2998,1459, 443,1067,3251,1495, 321,1932,3054, 909, 753,1410,1828, 436,
+2441,1119,1587,3164,2186,1258, 227, 231,1425,1890,3200,3942, 247, 959, 725,5254,
+2741, 577,2158,2079, 929, 120, 174, 838,2813, 591,1115, 417,2024,  40,3240,1536,
+1037, 291,4151,2354, 632,1298,2406,2500,3535,1825,1846,3451, 205,1171, 345,4238,
+  18,1163, 811, 685,2208,1217, 425,1312,1508,1175,4308,2552,1033, 587,1381,3059,
+2984,3482, 340,1316,4023,3972, 792,3176, 519, 777,4690, 918, 933,4130,2981,3741,
+  90,3360,2911,2200,5184,4550, 609,3079,2030, 272,3379,2736, 363,3881,1130,1447,
+ 286, 779, 357,1169,3350,3137,1630,1220,2687,2391, 747,1277,3688,2618,2682,2601,
+1156,3196,5290,4034,3102,1689,3596,3128, 874, 219,2783, 798, 508,1843,2461, 269,
+1658,1776,1392,1913,2983,3287,2866,2159,2372, 829,4076,  46,4253,2873,1889,1894,
+ 915,1834,1631,2181,2318, 298, 664,2818,3555,2735, 954,3228,3117, 527,3511,2173,
+ 681,2712,3033,2247,2346,3467,1652, 155,2164,3382, 113,1994, 450, 899, 494, 994,
+1237,2958,1875,2336,1926,3727, 545,1577,1550, 633,3473, 204,1305,3072,2410,1956,
+2471, 707,2134, 841,2195,2196,2663,3843,1026,4940, 990,3252,4997, 368,1092, 437,
+3212,3258,1933,1829, 675,2977,2893, 412, 943,3723,4644,3294,3283,2230,2373,5154,
+2389,2241,2661,2323,1404,2524, 593, 787, 677,3008,1275,2059, 438,2709,2609,2240,
+2269,2246,1446,  36,1568,1373,3892,1574,2301,1456,3962, 693,2276,5216,2035,1143,
+2720,1919,1797,1811,2763,4137,2597,1830,1699,1488,1198,2090, 424,1694, 312,3634,
+3390,4179,3335,2252,1214, 561,1059,3243,2295,2561, 975,5155,2321,2751,3772, 472,
+1537,3282,3398,1047,2077,2348,2878,1323,3340,3076, 690,2906,  51, 369, 170,3541,
+1060,2187,2688,3670,2541,1083,1683, 928,3918, 459, 109,4427, 599,3744,4286, 143,
+2101,2730,2490,  82,1588,3036,2121, 281,1860, 477,4035,1238,2812,3020,2716,3312,
+1530,2188,2055,1317, 843, 636,1808,1173,3495, 649, 181,1002, 147,3641,1159,2414,
+3750,2289,2795, 813,3123,2610,1136,4368,   5,3391,4541,2174, 420, 429,1728, 754,
+1228,2115,2219, 347,2223,2733, 735,1518,3003,2355,3134,1764,3948,3329,1888,2424,
+1001,1234,1972,3321,3363,1672,1021,1450,1584, 226, 765, 655,2526,3404,3244,2302,
+3665, 731, 594,2184, 319,1576, 621, 658,2656,4299,2099,3864,1279,2071,2598,2739,
+ 795,3086,3699,3908,1707,2352,2402,1382,3136,2475,1465,4847,3496,3865,1085,3004,
+2591,1084, 213,2287,1963,3565,2250, 822, 793,4574,3187,1772,1789,3050, 595,1484,
+1959,2770,1080,2650, 456, 422,2996, 940,3322,4328,4345,3092,2742, 965,2784, 739,
+4124, 952,1358,2498,2949,2565, 332,2698,2378, 660,2260,2473,4194,3856,2919, 535,
+1260,2651,1208,1428,1300,1949,1303,2942, 433,2455,2450,1251,1946, 614,1269, 641,
+1306,1810,2737,3078,2912, 564,2365,1419,1415,1497,4460,2367,2185,1379,3005,1307,
+3218,2175,1897,3063, 682,1157,4040,4005,1712,1160,1941,1399, 394, 402,2952,1573,
+1151,2986,2404, 862, 299,2033,1489,3006, 346, 171,2886,3401,1726,2932, 168,2533,
+  47,2507,1030,3735,1145,3370,1395,1318,1579,3609,4560,2857,4116,1457,2529,1965,
+ 504,1036,2690,2988,2405, 745,5871, 849,2397,2056,3081, 863,2359,3857,2096,  99,
+1397,1769,2300,4428,1643,3455,1978,1757,3718,1440,  35,4879,3742,1296,4228,2280,
+ 160,5063,1599,2013, 166, 520,3479,1646,3345,3012, 490,1937,1545,1264,2182,2505,
+1096,1188,1369,1436,2421,1667,2792,2460,1270,2122, 727,3167,2143, 806,1706,1012,
+1800,3037, 960,2218,1882, 805, 139,2456,1139,1521, 851,1052,3093,3089, 342,2039,
+ 744,5097,1468,1502,1585,2087, 223, 939, 326,2140,2577, 892,2481,1623,4077, 982,
+3708, 135,2131,  87,2503,3114,2326,1106, 876,1616, 547,2997,2831,2093,3441,4530,
+4314,   9,3256,4229,4148, 659,1462,1986,1710,2046,2913,2231,4090,4880,5255,3392,
+3274,1368,3689,4645,1477, 705,3384,3635,1068,1529,2941,1458,3782,1509, 100,1656,
+2548, 718,2339, 408,1590,2780,3548,1838,4117,3719,1345,3530, 717,3442,2778,3220,
+2898,1892,4590,3614,3371,2043,1998,1224,3483, 891, 635, 584,2559,3355, 733,1766,
+1729,1172,3789,1891,2307, 781,2982,2271,1957,1580,5773,2633,2005,4195,3097,1535,
+3213,1189,1934,5693,3262, 586,3118,1324,1598, 517,1564,2217,1868,1893,4445,3728,
+2703,3139,1526,1787,1992,3882,2875,1549,1199,1056,2224,1904,2711,5098,4287, 338,
+1993,3129,3489,2689,1809,2815,1997, 957,1855,3898,2550,3275,3057,1105,1319, 627,
+1505,1911,1883,3526, 698,3629,3456,1833,1431, 746,  77,1261,2017,2296,1977,1885,
+ 125,1334,1600, 525,1798,1109,2222,1470,1945, 559,2236,1186,3443,2476,1929,1411,
+2411,3135,1777,3372,2621,1841,1613,3229, 668,1430,1839,2643,2916, 195,1989,2671,
+2358,1387, 629,3205,2293,5256,4439, 123,1310, 888,1879,4300,3021,3605,1003,1162,
+3192,2910,2010, 140,2395,2859,  55,1082,2012,2901, 662, 419,2081,1438, 680,2774,
+4654,3912,1620,1731,1625,5035,4065,2328, 512,1344, 802,5443,2163,2311,2537, 524,
+3399,  98,1155,2103,1918,2606,3925,2816,1393,2465,1504,3773,2177,3963,1478,4346,
+ 180,1113,4655,3461,2028,1698, 833,2696,1235,1322,1594,4408,3623,3013,3225,2040,
+3022, 541,2881, 607,3632,2029,1665,1219, 639,1385,1686,1099,2803,3231,1938,3188,
+2858, 427, 676,2772,1168,2025, 454,3253,2486,3556, 230,1950, 580, 791,1991,1280,
+1086,1974,2034, 630, 257,3338,2788,4903,1017,  86,4790, 966,2789,1995,1696,1131,
+ 259,3095,4188,1308, 179,1463,5257, 289,4107,1248,  42,3413,1725,2288, 896,1947,
+ 774,4474,4254, 604,3430,4264, 392,2514,2588, 452, 237,1408,3018, 988,4531,1970,
+3034,3310, 540,2370,1562,1288,2990, 502,4765,1147,   4,1853,2708, 207, 294,2814,
+4078,2902,2509, 684,  34,3105,3532,2551, 644, 709,2801,2344, 573,1727,3573,3557,
+2021,1081,3100,4315,2100,3681, 199,2263,1837,2385, 146,3484,1195,2776,3949, 997,
+1939,3973,1008,1091,1202,1962,1847,1149,4209,5444,1076, 493, 117,5400,2521, 972,
+1490,2934,1796,4542,2374,1512,2933,2657, 413,2888,1135,2762,2314,2156,1355,2369,
+ 766,2007,2527,2170,3124,2491,2593,2632,4757,2437, 234,3125,3591,1898,1750,1376,
+1942,3468,3138, 570,2127,2145,3276,4131, 962, 132,1445,4196,  19, 941,3624,3480,
+3366,1973,1374,4461,3431,2629, 283,2415,2275, 808,2887,3620,2112,2563,1353,3610,
+ 955,1089,3103,1053,  96,  88,4097, 823,3808,1583, 399, 292,4091,3313, 421,1128,
+ 642,4006, 903,2539,1877,2082, 596,  29,4066,1790, 722,2157, 130, 995,1569, 769,
+1485, 464, 513,2213, 288,1923,1101,2453,4316, 133, 486,2445,  50, 625, 487,2207,
+  57, 423, 481,2962, 159,3729,1558, 491, 303, 482, 501, 240,2837, 112,3648,2392,
+1783, 362,   8,3433,3422, 610,2793,3277,1390,1284,1654,  21,3823, 734, 367, 623,
+ 193, 287, 374,1009,1483, 816, 476, 313,2255,2340,1262,2150,2899,1146,2581, 782,
+2116,1659,2018,1880, 255,3586,3314,1110,2867,2137,2564, 986,2767,5185,2006, 650,
+ 158, 926, 762, 881,3157,2717,2362,3587, 306,3690,3245,1542,3077,2427,1691,2478,
+2118,2985,3490,2438, 539,2305, 983, 129,1754, 355,4201,2386, 827,2923, 104,1773,
+2838,2771, 411,2905,3919, 376, 767, 122,1114, 828,2422,1817,3506, 266,3460,1007,
+1609,4998, 945,2612,4429,2274, 726,1247,1964,2914,2199,2070,4002,4108, 657,3323,
+1422, 579, 455,2764,4737,1222,2895,1670, 824,1223,1487,2525, 558, 861,3080, 598,
+2659,2515,1967, 752,2583,2376,2214,4180, 977, 704,2464,4999,2622,4109,1210,2961,
+ 819,1541, 142,2284,  44, 418, 457,1126,3730,4347,4626,1644,1876,3671,1864, 302,
+1063,5694, 624, 723,1984,3745,1314,1676,2488,1610,1449,3558,3569,2166,2098, 409,
+1011,2325,3704,2306, 818,1732,1383,1824,1844,3757, 999,2705,3497,1216,1423,2683,
+2426,2954,2501,2726,2229,1475,2554,5064,1971,1794,1666,2014,1343, 783, 724, 191,
+2434,1354,2220,5065,1763,2752,2472,4152, 131, 175,2885,3434,  92,1466,4920,2616,
+3871,3872,3866, 128,1551,1632, 669,1854,3682,4691,4125,1230, 188,2973,3290,1302,
+1213, 560,3266, 917, 763,3909,3249,1760, 868,1958, 764,1782,2097, 145,2277,3774,
+4462,  64,1491,3062, 971,2132,3606,2442, 221,1226,1617, 218, 323,1185,3207,3147,
+ 571, 619,1473,1005,1744,2281, 449,1887,2396,3685, 275, 375,3816,1743,3844,3731,
+ 845,1983,2350,4210,1377, 773, 967,3499,3052,3743,2725,4007,1697,1022,3943,1464,
+3264,2855,2722,1952,1029,2839,2467,  84,4383,2215, 820,1391,2015,2448,3672, 377,
+1948,2168, 797,2545,3536,2578,2645,  94,2874,1678, 405,1259,3071, 771, 546,1315,
+ 470,1243,3083, 895,2468, 981, 969,2037, 846,4181, 653,1276,2928,  14,2594, 557,
+3007,2474, 156, 902,1338,1740,2574, 537,2518, 973,2282,2216,2433,1928, 138,2903,
+1293,2631,1612, 646,3457, 839,2935, 111, 496,2191,2847, 589,3186, 149,3994,2060,
+4031,2641,4067,3145,1870,  37,3597,2136,1025,2051,3009,3383,3549,1121,1016,3261,
+1301, 251,2446,2599,2153, 872,3246, 637, 334,3705, 831, 884, 921,3065,3140,4092,
+2198,1944, 246,2964, 108,2045,1152,1921,2308,1031, 203,3173,4170,1907,3890, 810,
+1401,2003,1690, 506, 647,1242,2828,1761,1649,3208,2249,1589,3709,2931,5156,1708,
+ 498, 666,2613, 834,3817,1231, 184,2851,1124, 883,3197,2261,3710,1765,1553,2658,
+1178,2639,2351,  93,1193, 942,2538,2141,4402, 235,1821, 870,1591,2192,1709,1871,
+3341,1618,4126,2595,2334, 603, 651,  69, 701, 268,2662,3411,2555,1380,1606, 503,
+ 448, 254,2371,2646, 574,1187,2309,1770, 322,2235,1292,1801, 305, 566,1133, 229,
+2067,2057, 706, 167, 483,2002,2672,3295,1820,3561,3067, 316, 378,2746,3452,1112,
+ 136,1981, 507,1651,2917,1117, 285,4591, 182,2580,3522,1304, 335,3303,1835,2504,
+1795,1792,2248, 674,1018,2106,2449,1857,2292,2845, 976,3047,1781,2600,2727,1389,
+1281,  52,3152, 153, 265,3950, 672,3485,3951,4463, 430,1183, 365, 278,2169,  27,
+1407,1336,2304, 209,1340,1730,2202,1852,2403,2883, 979,1737,1062, 631,2829,2542,
+3876,2592, 825,2086,2226,3048,3625, 352,1417,3724, 542, 991, 431,1351,3938,1861,
+2294, 826,1361,2927,3142,3503,1738, 463,2462,2723, 582,1916,1595,2808, 400,3845,
+3891,2868,3621,2254,  58,2492,1123, 910,2160,2614,1372,1603,1196,1072,3385,1700,
+3267,1980, 696, 480,2430, 920, 799,1570,2920,1951,2041,4047,2540,1321,4223,2469,
+3562,2228,1271,2602, 401,2833,3351,2575,5157, 907,2312,1256, 410, 263,3507,1582,
+ 996, 678,1849,2316,1480, 908,3545,2237, 703,2322, 667,1826,2849,1531,2604,2999,
+2407,3146,2151,2630,1786,3711, 469,3542, 497,3899,2409, 858, 837,4446,3393,1274,
+ 786, 620,1845,2001,3311, 484, 308,3367,1204,1815,3691,2332,1532,2557,1842,2020,
+2724,1927,2333,4440, 567,  22,1673,2728,4475,1987,1858,1144,1597, 101,1832,3601,
+  12, 974,3783,4391, 951,1412,   1,3720, 453,4608,4041, 528,1041,1027,3230,2628,
+1129, 875,1051,3291,1203,2262,1069,2860,2799,2149,2615,3278, 144,1758,3040,  31,
+ 475,1680, 366,2685,3184, 311,1642,4008,2466,5036,1593,1493,2809, 216,1420,1668,
+ 233, 304,2128,3284, 232,1429,1768,1040,2008,3407,2740,2967,2543, 242,2133, 778,
+1565,2022,2620, 505,2189,2756,1098,2273, 372,1614, 708, 553,2846,2094,2278, 169,
+3626,2835,4161, 228,2674,3165, 809,1454,1309, 466,1705,1095, 900,3423, 880,2667,
+3751,5258,2317,3109,2571,4317,2766,1503,1342, 866,4447,1118,  63,2076, 314,1881,
+1348,1061, 172, 978,3515,1747, 532, 511,3970,   6, 601, 905,2699,3300,1751, 276,
+1467,3725,2668,  65,4239,2544,2779,2556,1604, 578,2451,1802, 992,2331,2624,1320,
+3446, 713,1513,1013, 103,2786,2447,1661, 886,1702, 916, 654,3574,2031,1556, 751,
+2178,2821,2179,1498,1538,2176, 271, 914,2251,2080,1325, 638,1953,2937,3877,2432,
+2754,  95,3265,1716, 260,1227,4083, 775, 106,1357,3254, 426,1607, 555,2480, 772,
+1985, 244,2546, 474, 495,1046,2611,1851,2061,  71,2089,1675,2590, 742,3758,2843,
+3222,1433, 267,2180,2576,2826,2233,2092,3913,2435, 956,1745,3075, 856,2113,1116,
+ 451,   3,1988,2896,1398, 993,2463,1878,2049,1341,2718,2721,2870,2108, 712,2904,
+4363,2753,2324, 277,2872,2349,2649, 384, 987, 435, 691,3000, 922, 164,3939, 652,
+1500,1184,4153,2482,3373,2165,4848,2335,3775,3508,3154,2806,2830,1554,2102,1664,
+2530,1434,2408, 893,1547,2623,3447,2832,2242,2532,3169,2856,3223,2078,  49,3770,
+3469, 462, 318, 656,2259,3250,3069, 679,1629,2758, 344,1138,1104,3120,1836,1283,
+3115,2154,1437,4448, 934, 759,1999, 794,2862,1038, 533,2560,1722,2342, 855,2626,
+1197,1663,4476,3127,  85,4240,2528,  25,1111,1181,3673, 407,3470,4561,2679,2713,
+ 768,1925,2841,3986,1544,1165, 932, 373,1240,2146,1930,2673, 721,4766, 354,4333,
+ 391,2963, 187,  61,3364,1442,1102, 330,1940,1767, 341,3809,4118, 393,2496,2062,
+2211, 105, 331, 300, 439, 913,1332, 626, 379,3304,1557, 328, 689,3952, 309,1555,
+ 931, 317,2517,3027, 325, 569, 686,2107,3084,  60,1042,1333,2794, 264,3177,4014,
+1628, 258,3712,   7,4464,1176,1043,1778, 683, 114,1975,  78,1492, 383,1886, 510,
+ 386, 645,5291,2891,2069,3305,4138,3867,2939,2603,2493,1935,1066,1848,3588,1015,
+1282,1289,4609, 697,1453,3044,2666,3611,1856,2412,  54, 719,1330, 568,3778,2459,
+1748, 788, 492, 551,1191,1000, 488,3394,3763, 282,1799, 348,2016,1523,3155,2390,
+1049, 382,2019,1788,1170, 729,2968,3523, 897,3926,2785,2938,3292, 350,2319,3238,
+1718,1717,2655,3453,3143,4465, 161,2889,2980,2009,1421,  56,1908,1640,2387,2232,
+1917,1874,2477,4921, 148,  83,3438, 592,4245,2882,1822,1055, 741, 115,1496,1624,
+ 381,1638,4592,1020, 516,3214, 458, 947,4575,1432, 211,1514,2926,1865,2142, 189,
+ 852,1221,1400,1486, 882,2299,4036, 351,  28,1122, 700,6479,6480,6481,6482,6483,  #last 512
+)
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/gb2312prober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/gb2312prober.py
new file mode 100644
index 0000000..8446d2d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/gb2312prober.py
@@ -0,0 +1,46 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import GB2312DistributionAnalysis
+from .mbcssm import GB2312_SM_MODEL
+
+class GB2312Prober(MultiByteCharSetProber):
+    def __init__(self):
+        super(GB2312Prober, self).__init__()
+        self.coding_sm = CodingStateMachine(GB2312_SM_MODEL)
+        self.distribution_analyzer = GB2312DistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "GB2312"
+
+    @property
+    def language(self):
+        return "Chinese"
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/hebrewprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/hebrewprober.py
new file mode 100644
index 0000000..b0e1bf4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/hebrewprober.py
@@ -0,0 +1,292 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+#          Shy Shalom
+# Portions created by the Initial Developer are Copyright (C) 2005
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState
+
+# This prober doesn't actually recognize a language or a charset.
+# It is a helper prober for the use of the Hebrew model probers
+
+### General ideas of the Hebrew charset recognition ###
+#
+# Four main charsets exist in Hebrew:
+# "ISO-8859-8" - Visual Hebrew
+# "windows-1255" - Logical Hebrew
+# "ISO-8859-8-I" - Logical Hebrew
+# "x-mac-hebrew" - ?? Logical Hebrew ??
+#
+# Both "ISO" charsets use a completely identical set of code points, whereas
+# "windows-1255" and "x-mac-hebrew" are two different proper supersets of
+# these code points. windows-1255 defines additional characters in the range
+# 0x80-0x9F as some misc punctuation marks as well as some Hebrew-specific
+# diacritics and additional 'Yiddish' ligature letters in the range 0xc0-0xd6.
+# x-mac-hebrew defines similar additional code points but with a different
+# mapping.
+#
+# As far as an average Hebrew text with no diacritics is concerned, all four
+# charsets are identical with respect to code points. Meaning that for the
+# main Hebrew alphabet, all four map the same values to all 27 Hebrew letters
+# (including final letters).
+#
+# The dominant difference between these charsets is their directionality.
+# "Visual" directionality means that the text is ordered as if the renderer is
+# not aware of a BIDI rendering algorithm. The renderer sees the text and
+# draws it from left to right. The text itself when ordered naturally is read
+# backwards. A buffer of Visual Hebrew generally looks like so:
+# "[last word of first line spelled backwards] [whole line ordered backwards
+# and spelled backwards] [first word of first line spelled backwards]
+# [end of line] [last word of second line] ... etc' "
+# adding punctuation marks, numbers and English text to visual text is
+# naturally also "visual" and from left to right.
+#
+# "Logical" directionality means the text is ordered "naturally" according to
+# the order it is read. It is the responsibility of the renderer to display
+# the text from right to left. A BIDI algorithm is used to place general
+# punctuation marks, numbers and English text in the text.
+#
+# Texts in x-mac-hebrew are almost impossible to find on the Internet. From
+# what little evidence I could find, it seems that its general directionality
+# is Logical.
+#
+# To sum up all of the above, the Hebrew probing mechanism knows about two
+# charsets:
+# Visual Hebrew - "ISO-8859-8" - backwards text - Words and sentences are
+#    backwards while line order is natural. For charset recognition purposes
+#    the line order is unimportant (In fact, for this implementation, even
+#    word order is unimportant).
+# Logical Hebrew - "windows-1255" - normal, naturally ordered text.
+#
+# "ISO-8859-8-I" is a subset of windows-1255 and doesn't need to be
+#    specifically identified.
+# "x-mac-hebrew" is also identified as windows-1255. A text in x-mac-hebrew
+#    that contain special punctuation marks or diacritics is displayed with
+#    some unconverted characters showing as question marks. This problem might
+#    be corrected using another model prober for x-mac-hebrew. Due to the fact
+#    that x-mac-hebrew texts are so rare, writing another model prober isn't
+#    worth the effort and performance hit.
+#
+#### The Prober ####
+#
+# The prober is divided between two SBCharSetProbers and a HebrewProber,
+# all of which are managed, created, fed data, inquired and deleted by the
+# SBCSGroupProber. The two SBCharSetProbers identify that the text is in
+# fact some kind of Hebrew, Logical or Visual. The final decision about which
+# one is it is made by the HebrewProber by combining final-letter scores
+# with the scores of the two SBCharSetProbers to produce a final answer.
+#
+# The SBCSGroupProber is responsible for stripping the original text of HTML
+# tags, English characters, numbers, low-ASCII punctuation characters, spaces
+# and new lines. It reduces any sequence of such characters to a single space.
+# The buffer fed to each prober in the SBCS group prober is pure text in
+# high-ASCII.
+# The two SBCharSetProbers (model probers) share the same language model:
+# Win1255Model.
+# The first SBCharSetProber uses the model normally as any other
+# SBCharSetProber does, to recognize windows-1255, upon which this model was
+# built. The second SBCharSetProber is told to make the pair-of-letter
+# lookup in the language model backwards. This in practice exactly simulates
+# a visual Hebrew model using the windows-1255 logical Hebrew model.
+#
+# The HebrewProber is not using any language model. All it does is look for
+# final-letter evidence suggesting the text is either logical Hebrew or visual
+# Hebrew. Disjointed from the model probers, the results of the HebrewProber
+# alone are meaningless. HebrewProber always returns 0.00 as confidence
+# since it never identifies a charset by itself. Instead, the pointer to the
+# HebrewProber is passed to the model probers as a helper "Name Prober".
+# When the Group prober receives a positive identification from any prober,
+# it asks for the name of the charset identified. If the prober queried is a
+# Hebrew model prober, the model prober forwards the call to the
+# HebrewProber to make the final decision. In the HebrewProber, the
+# decision is made according to the final-letters scores maintained and Both
+# model probers scores. The answer is returned in the form of the name of the
+# charset identified, either "windows-1255" or "ISO-8859-8".
+
+class HebrewProber(CharSetProber):
+    # windows-1255 / ISO-8859-8 code points of interest
+    FINAL_KAF = 0xea
+    NORMAL_KAF = 0xeb
+    FINAL_MEM = 0xed
+    NORMAL_MEM = 0xee
+    FINAL_NUN = 0xef
+    NORMAL_NUN = 0xf0
+    FINAL_PE = 0xf3
+    NORMAL_PE = 0xf4
+    FINAL_TSADI = 0xf5
+    NORMAL_TSADI = 0xf6
+
+    # Minimum Visual vs Logical final letter score difference.
+    # If the difference is below this, don't rely solely on the final letter score
+    # distance.
+    MIN_FINAL_CHAR_DISTANCE = 5
+
+    # Minimum Visual vs Logical model score difference.
+    # If the difference is below this, don't rely at all on the model score
+    # distance.
+    MIN_MODEL_DISTANCE = 0.01
+
+    VISUAL_HEBREW_NAME = "ISO-8859-8"
+    LOGICAL_HEBREW_NAME = "windows-1255"
+
+    def __init__(self):
+        super(HebrewProber, self).__init__()
+        self._final_char_logical_score = None
+        self._final_char_visual_score = None
+        self._prev = None
+        self._before_prev = None
+        self._logical_prober = None
+        self._visual_prober = None
+        self.reset()
+
+    def reset(self):
+        self._final_char_logical_score = 0
+        self._final_char_visual_score = 0
+        # The two last characters seen in the previous buffer,
+        # mPrev and mBeforePrev are initialized to space in order to simulate
+        # a word delimiter at the beginning of the data
+        self._prev = ' '
+        self._before_prev = ' '
+        # These probers are owned by the group prober.
+
+    def set_model_probers(self, logicalProber, visualProber):
+        self._logical_prober = logicalProber
+        self._visual_prober = visualProber
+
+    def is_final(self, c):
+        return c in [self.FINAL_KAF, self.FINAL_MEM, self.FINAL_NUN,
+                     self.FINAL_PE, self.FINAL_TSADI]
+
+    def is_non_final(self, c):
+        # The normal Tsadi is not a good Non-Final letter due to words like
+        # 'lechotet' (to chat) containing an apostrophe after the tsadi. This
+        # apostrophe is converted to a space in FilterWithoutEnglishLetters
+        # causing the Non-Final tsadi to appear at an end of a word even
+        # though this is not the case in the original text.
+        # The letters Pe and Kaf rarely display a related behavior of not being
+        # a good Non-Final letter. Words like 'Pop', 'Winamp' and 'Mubarak'
+        # for example legally end with a Non-Final Pe or Kaf. However, the
+        # benefit of these letters as Non-Final letters outweighs the damage
+        # since these words are quite rare.
+        return c in [self.NORMAL_KAF, self.NORMAL_MEM,
+                     self.NORMAL_NUN, self.NORMAL_PE]
+
+    def feed(self, byte_str):
+        # Final letter analysis for logical-visual decision.
+        # Look for evidence that the received buffer is either logical Hebrew
+        # or visual Hebrew.
+        # The following cases are checked:
+        # 1) A word longer than 1 letter, ending with a final letter. This is
+        #    an indication that the text is laid out "naturally" since the
+        #    final letter really appears at the end. +1 for logical score.
+        # 2) A word longer than 1 letter, ending with a Non-Final letter. In
+        #    normal Hebrew, words ending with Kaf, Mem, Nun, Pe or Tsadi,
+        #    should not end with the Non-Final form of that letter. Exceptions
+        #    to this rule are mentioned above in isNonFinal(). This is an
+        #    indication that the text is laid out backwards. +1 for visual
+        #    score
+        # 3) A word longer than 1 letter, starting with a final letter. Final
+        #    letters should not appear at the beginning of a word. This is an
+        #    indication that the text is laid out backwards. +1 for visual
+        #    score.
+        #
+        # The visual score and logical score are accumulated throughout the
+        # text and are finally checked against each other in GetCharSetName().
+        # No checking for final letters in the middle of words is done since
+        # that case is not an indication for either Logical or Visual text.
+        #
+        # We automatically filter out all 7-bit characters (replace them with
+        # spaces) so the word boundary detection works properly. [MAP]
+
+        if self.state == ProbingState.NOT_ME:
+            # Both model probers say it's not them. No reason to continue.
+            return ProbingState.NOT_ME
+
+        byte_str = self.filter_high_byte_only(byte_str)
+
+        for cur in byte_str:
+            if cur == ' ':
+                # We stand on a space - a word just ended
+                if self._before_prev != ' ':
+                    # next-to-last char was not a space so self._prev is not a
+                    # 1 letter word
+                    if self.is_final(self._prev):
+                        # case (1) [-2:not space][-1:final letter][cur:space]
+                        self._final_char_logical_score += 1
+                    elif self.is_non_final(self._prev):
+                        # case (2) [-2:not space][-1:Non-Final letter][
+                        #  cur:space]
+                        self._final_char_visual_score += 1
+            else:
+                # Not standing on a space
+                if ((self._before_prev == ' ') and
+                        (self.is_final(self._prev)) and (cur != ' ')):
+                    # case (3) [-2:space][-1:final letter][cur:not space]
+                    self._final_char_visual_score += 1
+            self._before_prev = self._prev
+            self._prev = cur
+
+        # Forever detecting, till the end or until both model probers return
+        # ProbingState.NOT_ME (handled above)
+        return ProbingState.DETECTING
+
+    @property
+    def charset_name(self):
+        # Make the decision: is it Logical or Visual?
+        # If the final letter score distance is dominant enough, rely on it.
+        finalsub = self._final_char_logical_score - self._final_char_visual_score
+        if finalsub >= self.MIN_FINAL_CHAR_DISTANCE:
+            return self.LOGICAL_HEBREW_NAME
+        if finalsub <= -self.MIN_FINAL_CHAR_DISTANCE:
+            return self.VISUAL_HEBREW_NAME
+
+        # It's not dominant enough, try to rely on the model scores instead.
+        modelsub = (self._logical_prober.get_confidence()
+                    - self._visual_prober.get_confidence())
+        if modelsub > self.MIN_MODEL_DISTANCE:
+            return self.LOGICAL_HEBREW_NAME
+        if modelsub < -self.MIN_MODEL_DISTANCE:
+            return self.VISUAL_HEBREW_NAME
+
+        # Still no good, back to final letter distance, maybe it'll save the
+        # day.
+        if finalsub < 0.0:
+            return self.VISUAL_HEBREW_NAME
+
+        # (finalsub > 0 - Logical) or (don't know what to do) default to
+        # Logical.
+        return self.LOGICAL_HEBREW_NAME
+
+    @property
+    def language(self):
+        return 'Hebrew'
+
+    @property
+    def state(self):
+        # Remain active as long as any of the model probers are active.
+        if (self._logical_prober.state == ProbingState.NOT_ME) and \
+           (self._visual_prober.state == ProbingState.NOT_ME):
+            return ProbingState.NOT_ME
+        return ProbingState.DETECTING
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/jisfreq.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/jisfreq.py
new file mode 100644
index 0000000..83fc082
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/jisfreq.py
@@ -0,0 +1,325 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# Sampling from about 20M text materials include literature and computer technology
+#
+# Japanese frequency table, applied to both S-JIS and EUC-JP
+# They are sorted in order.
+
+# 128  --> 0.77094
+# 256  --> 0.85710
+# 512  --> 0.92635
+# 1024 --> 0.97130
+# 2048 --> 0.99431
+#
+# Ideal Distribution Ratio = 0.92635 / (1-0.92635) = 12.58
+# Random Distribution Ration = 512 / (2965+62+83+86-512) = 0.191
+#
+# Typical Distribution Ratio, 25% of IDR
+
+JIS_TYPICAL_DISTRIBUTION_RATIO = 3.0
+
+# Char to FreqOrder table ,
+JIS_TABLE_SIZE = 4368
+
+JIS_CHAR_TO_FREQ_ORDER = (
+  40,   1,   6, 182, 152, 180, 295,2127, 285, 381,3295,4304,3068,4606,3165,3510, #   16
+3511,1822,2785,4607,1193,2226,5070,4608, 171,2996,1247,  18, 179,5071, 856,1661, #   32
+1262,5072, 619, 127,3431,3512,3230,1899,1700, 232, 228,1294,1298, 284, 283,2041, #   48
+2042,1061,1062,  48,  49,  44,  45, 433, 434,1040,1041, 996, 787,2997,1255,4305, #   64
+2108,4609,1684,1648,5073,5074,5075,5076,5077,5078,3687,5079,4610,5080,3927,3928, #   80
+5081,3296,3432, 290,2285,1471,2187,5082,2580,2825,1303,2140,1739,1445,2691,3375, #   96
+1691,3297,4306,4307,4611, 452,3376,1182,2713,3688,3069,4308,5083,5084,5085,5086, #  112
+5087,5088,5089,5090,5091,5092,5093,5094,5095,5096,5097,5098,5099,5100,5101,5102, #  128
+5103,5104,5105,5106,5107,5108,5109,5110,5111,5112,4097,5113,5114,5115,5116,5117, #  144
+5118,5119,5120,5121,5122,5123,5124,5125,5126,5127,5128,5129,5130,5131,5132,5133, #  160
+5134,5135,5136,5137,5138,5139,5140,5141,5142,5143,5144,5145,5146,5147,5148,5149, #  176
+5150,5151,5152,4612,5153,5154,5155,5156,5157,5158,5159,5160,5161,5162,5163,5164, #  192
+5165,5166,5167,5168,5169,5170,5171,5172,5173,5174,5175,1472, 598, 618, 820,1205, #  208
+1309,1412,1858,1307,1692,5176,5177,5178,5179,5180,5181,5182,1142,1452,1234,1172, #  224
+1875,2043,2149,1793,1382,2973, 925,2404,1067,1241, 960,1377,2935,1491, 919,1217, #  240
+1865,2030,1406,1499,2749,4098,5183,5184,5185,5186,5187,5188,2561,4099,3117,1804, #  256
+2049,3689,4309,3513,1663,5189,3166,3118,3298,1587,1561,3433,5190,3119,1625,2998, #  272
+3299,4613,1766,3690,2786,4614,5191,5192,5193,5194,2161,  26,3377,   2,3929,  20, #  288
+3691,  47,4100,  50,  17,  16,  35, 268,  27, 243,  42, 155,  24, 154,  29, 184, #  304
+   4,  91,  14,  92,  53, 396,  33, 289,   9,  37,  64, 620,  21,  39, 321,   5, #  320
+  12,  11,  52,  13,   3, 208, 138,   0,   7,  60, 526, 141, 151,1069, 181, 275, #  336
+1591,  83, 132,1475, 126, 331, 829,  15,  69, 160,  59,  22, 157,  55,1079, 312, #  352
+ 109,  38,  23,  25,  10,  19,  79,5195,  61, 382,1124,   8,  30,5196,5197,5198, #  368
+5199,5200,5201,5202,5203,5204,5205,5206,  89,  62,  74,  34,2416, 112, 139, 196, #  384
+ 271, 149,  84, 607, 131, 765,  46,  88, 153, 683,  76, 874, 101, 258,  57,  80, #  400
+  32, 364, 121,1508, 169,1547,  68, 235, 145,2999,  41, 360,3027,  70,  63,  31, #  416
+  43, 259, 262,1383,  99, 533, 194,  66,  93, 846, 217, 192,  56, 106,  58, 565, #  432
+ 280, 272, 311, 256, 146,  82, 308,  71, 100, 128, 214, 655, 110, 261, 104,1140, #  448
+  54,  51,  36,  87,  67,3070, 185,2618,2936,2020,  28,1066,2390,2059,5207,5208, #  464
+5209,5210,5211,5212,5213,5214,5215,5216,4615,5217,5218,5219,5220,5221,5222,5223, #  480
+5224,5225,5226,5227,5228,5229,5230,5231,5232,5233,5234,5235,5236,3514,5237,5238, #  496
+5239,5240,5241,5242,5243,5244,2297,2031,4616,4310,3692,5245,3071,5246,3598,5247, #  512
+4617,3231,3515,5248,4101,4311,4618,3808,4312,4102,5249,4103,4104,3599,5250,5251, #  528
+5252,5253,5254,5255,5256,5257,5258,5259,5260,5261,5262,5263,5264,5265,5266,5267, #  544
+5268,5269,5270,5271,5272,5273,5274,5275,5276,5277,5278,5279,5280,5281,5282,5283, #  560
+5284,5285,5286,5287,5288,5289,5290,5291,5292,5293,5294,5295,5296,5297,5298,5299, #  576
+5300,5301,5302,5303,5304,5305,5306,5307,5308,5309,5310,5311,5312,5313,5314,5315, #  592
+5316,5317,5318,5319,5320,5321,5322,5323,5324,5325,5326,5327,5328,5329,5330,5331, #  608
+5332,5333,5334,5335,5336,5337,5338,5339,5340,5341,5342,5343,5344,5345,5346,5347, #  624
+5348,5349,5350,5351,5352,5353,5354,5355,5356,5357,5358,5359,5360,5361,5362,5363, #  640
+5364,5365,5366,5367,5368,5369,5370,5371,5372,5373,5374,5375,5376,5377,5378,5379, #  656
+5380,5381, 363, 642,2787,2878,2788,2789,2316,3232,2317,3434,2011, 165,1942,3930, #  672
+3931,3932,3933,5382,4619,5383,4620,5384,5385,5386,5387,5388,5389,5390,5391,5392, #  688
+5393,5394,5395,5396,5397,5398,5399,5400,5401,5402,5403,5404,5405,5406,5407,5408, #  704
+5409,5410,5411,5412,5413,5414,5415,5416,5417,5418,5419,5420,5421,5422,5423,5424, #  720
+5425,5426,5427,5428,5429,5430,5431,5432,5433,5434,5435,5436,5437,5438,5439,5440, #  736
+5441,5442,5443,5444,5445,5446,5447,5448,5449,5450,5451,5452,5453,5454,5455,5456, #  752
+5457,5458,5459,5460,5461,5462,5463,5464,5465,5466,5467,5468,5469,5470,5471,5472, #  768
+5473,5474,5475,5476,5477,5478,5479,5480,5481,5482,5483,5484,5485,5486,5487,5488, #  784
+5489,5490,5491,5492,5493,5494,5495,5496,5497,5498,5499,5500,5501,5502,5503,5504, #  800
+5505,5506,5507,5508,5509,5510,5511,5512,5513,5514,5515,5516,5517,5518,5519,5520, #  816
+5521,5522,5523,5524,5525,5526,5527,5528,5529,5530,5531,5532,5533,5534,5535,5536, #  832
+5537,5538,5539,5540,5541,5542,5543,5544,5545,5546,5547,5548,5549,5550,5551,5552, #  848
+5553,5554,5555,5556,5557,5558,5559,5560,5561,5562,5563,5564,5565,5566,5567,5568, #  864
+5569,5570,5571,5572,5573,5574,5575,5576,5577,5578,5579,5580,5581,5582,5583,5584, #  880
+5585,5586,5587,5588,5589,5590,5591,5592,5593,5594,5595,5596,5597,5598,5599,5600, #  896
+5601,5602,5603,5604,5605,5606,5607,5608,5609,5610,5611,5612,5613,5614,5615,5616, #  912
+5617,5618,5619,5620,5621,5622,5623,5624,5625,5626,5627,5628,5629,5630,5631,5632, #  928
+5633,5634,5635,5636,5637,5638,5639,5640,5641,5642,5643,5644,5645,5646,5647,5648, #  944
+5649,5650,5651,5652,5653,5654,5655,5656,5657,5658,5659,5660,5661,5662,5663,5664, #  960
+5665,5666,5667,5668,5669,5670,5671,5672,5673,5674,5675,5676,5677,5678,5679,5680, #  976
+5681,5682,5683,5684,5685,5686,5687,5688,5689,5690,5691,5692,5693,5694,5695,5696, #  992
+5697,5698,5699,5700,5701,5702,5703,5704,5705,5706,5707,5708,5709,5710,5711,5712, # 1008
+5713,5714,5715,5716,5717,5718,5719,5720,5721,5722,5723,5724,5725,5726,5727,5728, # 1024
+5729,5730,5731,5732,5733,5734,5735,5736,5737,5738,5739,5740,5741,5742,5743,5744, # 1040
+5745,5746,5747,5748,5749,5750,5751,5752,5753,5754,5755,5756,5757,5758,5759,5760, # 1056
+5761,5762,5763,5764,5765,5766,5767,5768,5769,5770,5771,5772,5773,5774,5775,5776, # 1072
+5777,5778,5779,5780,5781,5782,5783,5784,5785,5786,5787,5788,5789,5790,5791,5792, # 1088
+5793,5794,5795,5796,5797,5798,5799,5800,5801,5802,5803,5804,5805,5806,5807,5808, # 1104
+5809,5810,5811,5812,5813,5814,5815,5816,5817,5818,5819,5820,5821,5822,5823,5824, # 1120
+5825,5826,5827,5828,5829,5830,5831,5832,5833,5834,5835,5836,5837,5838,5839,5840, # 1136
+5841,5842,5843,5844,5845,5846,5847,5848,5849,5850,5851,5852,5853,5854,5855,5856, # 1152
+5857,5858,5859,5860,5861,5862,5863,5864,5865,5866,5867,5868,5869,5870,5871,5872, # 1168
+5873,5874,5875,5876,5877,5878,5879,5880,5881,5882,5883,5884,5885,5886,5887,5888, # 1184
+5889,5890,5891,5892,5893,5894,5895,5896,5897,5898,5899,5900,5901,5902,5903,5904, # 1200
+5905,5906,5907,5908,5909,5910,5911,5912,5913,5914,5915,5916,5917,5918,5919,5920, # 1216
+5921,5922,5923,5924,5925,5926,5927,5928,5929,5930,5931,5932,5933,5934,5935,5936, # 1232
+5937,5938,5939,5940,5941,5942,5943,5944,5945,5946,5947,5948,5949,5950,5951,5952, # 1248
+5953,5954,5955,5956,5957,5958,5959,5960,5961,5962,5963,5964,5965,5966,5967,5968, # 1264
+5969,5970,5971,5972,5973,5974,5975,5976,5977,5978,5979,5980,5981,5982,5983,5984, # 1280
+5985,5986,5987,5988,5989,5990,5991,5992,5993,5994,5995,5996,5997,5998,5999,6000, # 1296
+6001,6002,6003,6004,6005,6006,6007,6008,6009,6010,6011,6012,6013,6014,6015,6016, # 1312
+6017,6018,6019,6020,6021,6022,6023,6024,6025,6026,6027,6028,6029,6030,6031,6032, # 1328
+6033,6034,6035,6036,6037,6038,6039,6040,6041,6042,6043,6044,6045,6046,6047,6048, # 1344
+6049,6050,6051,6052,6053,6054,6055,6056,6057,6058,6059,6060,6061,6062,6063,6064, # 1360
+6065,6066,6067,6068,6069,6070,6071,6072,6073,6074,6075,6076,6077,6078,6079,6080, # 1376
+6081,6082,6083,6084,6085,6086,6087,6088,6089,6090,6091,6092,6093,6094,6095,6096, # 1392
+6097,6098,6099,6100,6101,6102,6103,6104,6105,6106,6107,6108,6109,6110,6111,6112, # 1408
+6113,6114,2044,2060,4621, 997,1235, 473,1186,4622, 920,3378,6115,6116, 379,1108, # 1424
+4313,2657,2735,3934,6117,3809, 636,3233, 573,1026,3693,3435,2974,3300,2298,4105, # 1440
+ 854,2937,2463, 393,2581,2417, 539, 752,1280,2750,2480, 140,1161, 440, 708,1569, # 1456
+ 665,2497,1746,1291,1523,3000, 164,1603, 847,1331, 537,1997, 486, 508,1693,2418, # 1472
+1970,2227, 878,1220, 299,1030, 969, 652,2751, 624,1137,3301,2619,  65,3302,2045, # 1488
+1761,1859,3120,1930,3694,3516, 663,1767, 852, 835,3695, 269, 767,2826,2339,1305, # 1504
+ 896,1150, 770,1616,6118, 506,1502,2075,1012,2519, 775,2520,2975,2340,2938,4314, # 1520
+3028,2086,1224,1943,2286,6119,3072,4315,2240,1273,1987,3935,1557, 175, 597, 985, # 1536
+3517,2419,2521,1416,3029, 585, 938,1931,1007,1052,1932,1685,6120,3379,4316,4623, # 1552
+ 804, 599,3121,1333,2128,2539,1159,1554,2032,3810, 687,2033,2904, 952, 675,1467, # 1568
+3436,6121,2241,1096,1786,2440,1543,1924, 980,1813,2228, 781,2692,1879, 728,1918, # 1584
+3696,4624, 548,1950,4625,1809,1088,1356,3303,2522,1944, 502, 972, 373, 513,2827, # 1600
+ 586,2377,2391,1003,1976,1631,6122,2464,1084, 648,1776,4626,2141, 324, 962,2012, # 1616
+2177,2076,1384, 742,2178,1448,1173,1810, 222, 102, 301, 445, 125,2420, 662,2498, # 1632
+ 277, 200,1476,1165,1068, 224,2562,1378,1446, 450,1880, 659, 791, 582,4627,2939, # 1648
+3936,1516,1274, 555,2099,3697,1020,1389,1526,3380,1762,1723,1787,2229, 412,2114, # 1664
+1900,2392,3518, 512,2597, 427,1925,2341,3122,1653,1686,2465,2499, 697, 330, 273, # 1680
+ 380,2162, 951, 832, 780, 991,1301,3073, 965,2270,3519, 668,2523,2636,1286, 535, # 1696
+1407, 518, 671, 957,2658,2378, 267, 611,2197,3030,6123, 248,2299, 967,1799,2356, # 1712
+ 850,1418,3437,1876,1256,1480,2828,1718,6124,6125,1755,1664,2405,6126,4628,2879, # 1728
+2829, 499,2179, 676,4629, 557,2329,2214,2090, 325,3234, 464, 811,3001, 992,2342, # 1744
+2481,1232,1469, 303,2242, 466,1070,2163, 603,1777,2091,4630,2752,4631,2714, 322, # 1760
+2659,1964,1768, 481,2188,1463,2330,2857,3600,2092,3031,2421,4632,2318,2070,1849, # 1776
+2598,4633,1302,2254,1668,1701,2422,3811,2905,3032,3123,2046,4106,1763,1694,4634, # 1792
+1604, 943,1724,1454, 917, 868,2215,1169,2940, 552,1145,1800,1228,1823,1955, 316, # 1808
+1080,2510, 361,1807,2830,4107,2660,3381,1346,1423,1134,4108,6127, 541,1263,1229, # 1824
+1148,2540, 545, 465,1833,2880,3438,1901,3074,2482, 816,3937, 713,1788,2500, 122, # 1840
+1575, 195,1451,2501,1111,6128, 859, 374,1225,2243,2483,4317, 390,1033,3439,3075, # 1856
+2524,1687, 266, 793,1440,2599, 946, 779, 802, 507, 897,1081, 528,2189,1292, 711, # 1872
+1866,1725,1167,1640, 753, 398,2661,1053, 246, 348,4318, 137,1024,3440,1600,2077, # 1888
+2129, 825,4319, 698, 238, 521, 187,2300,1157,2423,1641,1605,1464,1610,1097,2541, # 1904
+1260,1436, 759,2255,1814,2150, 705,3235, 409,2563,3304, 561,3033,2005,2564, 726, # 1920
+1956,2343,3698,4109, 949,3812,3813,3520,1669, 653,1379,2525, 881,2198, 632,2256, # 1936
+1027, 778,1074, 733,1957, 514,1481,2466, 554,2180, 702,3938,1606,1017,1398,6129, # 1952
+1380,3521, 921, 993,1313, 594, 449,1489,1617,1166, 768,1426,1360, 495,1794,3601, # 1968
+1177,3602,1170,4320,2344, 476, 425,3167,4635,3168,1424, 401,2662,1171,3382,1998, # 1984
+1089,4110, 477,3169, 474,6130,1909, 596,2831,1842, 494, 693,1051,1028,1207,3076, # 2000
+ 606,2115, 727,2790,1473,1115, 743,3522, 630, 805,1532,4321,2021, 366,1057, 838, # 2016
+ 684,1114,2142,4322,2050,1492,1892,1808,2271,3814,2424,1971,1447,1373,3305,1090, # 2032
+1536,3939,3523,3306,1455,2199, 336, 369,2331,1035, 584,2393, 902, 718,2600,6131, # 2048
+2753, 463,2151,1149,1611,2467, 715,1308,3124,1268, 343,1413,3236,1517,1347,2663, # 2064
+2093,3940,2022,1131,1553,2100,2941,1427,3441,2942,1323,2484,6132,1980, 872,2368, # 2080
+2441,2943, 320,2369,2116,1082, 679,1933,3941,2791,3815, 625,1143,2023, 422,2200, # 2096
+3816,6133, 730,1695, 356,2257,1626,2301,2858,2637,1627,1778, 937, 883,2906,2693, # 2112
+3002,1769,1086, 400,1063,1325,3307,2792,4111,3077, 456,2345,1046, 747,6134,1524, # 2128
+ 884,1094,3383,1474,2164,1059, 974,1688,2181,2258,1047, 345,1665,1187, 358, 875, # 2144
+3170, 305, 660,3524,2190,1334,1135,3171,1540,1649,2542,1527, 927, 968,2793, 885, # 2160
+1972,1850, 482, 500,2638,1218,1109,1085,2543,1654,2034, 876,  78,2287,1482,1277, # 2176
+ 861,1675,1083,1779, 724,2754, 454, 397,1132,1612,2332, 893, 672,1237, 257,2259, # 2192
+2370, 135,3384, 337,2244, 547, 352, 340, 709,2485,1400, 788,1138,2511, 540, 772, # 2208
+1682,2260,2272,2544,2013,1843,1902,4636,1999,1562,2288,4637,2201,1403,1533, 407, # 2224
+ 576,3308,1254,2071, 978,3385, 170, 136,1201,3125,2664,3172,2394, 213, 912, 873, # 2240
+3603,1713,2202, 699,3604,3699, 813,3442, 493, 531,1054, 468,2907,1483, 304, 281, # 2256
+4112,1726,1252,2094, 339,2319,2130,2639, 756,1563,2944, 748, 571,2976,1588,2425, # 2272
+2715,1851,1460,2426,1528,1392,1973,3237, 288,3309, 685,3386, 296, 892,2716,2216, # 2288
+1570,2245, 722,1747,2217, 905,3238,1103,6135,1893,1441,1965, 251,1805,2371,3700, # 2304
+2601,1919,1078,  75,2182,1509,1592,1270,2640,4638,2152,6136,3310,3817, 524, 706, # 2320
+1075, 292,3818,1756,2602, 317,  98,3173,3605,3525,1844,2218,3819,2502, 814, 567, # 2336
+ 385,2908,1534,6137, 534,1642,3239, 797,6138,1670,1529, 953,4323, 188,1071, 538, # 2352
+ 178, 729,3240,2109,1226,1374,2000,2357,2977, 731,2468,1116,2014,2051,6139,1261, # 2368
+1593, 803,2859,2736,3443, 556, 682, 823,1541,6140,1369,2289,1706,2794, 845, 462, # 2384
+2603,2665,1361, 387, 162,2358,1740, 739,1770,1720,1304,1401,3241,1049, 627,1571, # 2400
+2427,3526,1877,3942,1852,1500, 431,1910,1503, 677, 297,2795, 286,1433,1038,1198, # 2416
+2290,1133,1596,4113,4639,2469,1510,1484,3943,6141,2442, 108, 712,4640,2372, 866, # 2432
+3701,2755,3242,1348, 834,1945,1408,3527,2395,3243,1811, 824, 994,1179,2110,1548, # 2448
+1453, 790,3003, 690,4324,4325,2832,2909,3820,1860,3821, 225,1748, 310, 346,1780, # 2464
+2470, 821,1993,2717,2796, 828, 877,3528,2860,2471,1702,2165,2910,2486,1789, 453, # 2480
+ 359,2291,1676,  73,1164,1461,1127,3311, 421, 604, 314,1037, 589, 116,2487, 737, # 2496
+ 837,1180, 111, 244, 735,6142,2261,1861,1362, 986, 523, 418, 581,2666,3822, 103, # 2512
+ 855, 503,1414,1867,2488,1091, 657,1597, 979, 605,1316,4641,1021,2443,2078,2001, # 2528
+1209,  96, 587,2166,1032, 260,1072,2153, 173,  94, 226,3244, 819,2006,4642,4114, # 2544
+2203, 231,1744, 782,  97,2667, 786,3387, 887, 391, 442,2219,4326,1425,6143,2694, # 2560
+ 633,1544,1202, 483,2015, 592,2052,1958,2472,1655, 419, 129,4327,3444,3312,1714, # 2576
+1257,3078,4328,1518,1098, 865,1310,1019,1885,1512,1734, 469,2444, 148, 773, 436, # 2592
+1815,1868,1128,1055,4329,1245,2756,3445,2154,1934,1039,4643, 579,1238, 932,2320, # 2608
+ 353, 205, 801, 115,2428, 944,2321,1881, 399,2565,1211, 678, 766,3944, 335,2101, # 2624
+1459,1781,1402,3945,2737,2131,1010, 844, 981,1326,1013, 550,1816,1545,2620,1335, # 2640
+1008, 371,2881, 936,1419,1613,3529,1456,1395,2273,1834,2604,1317,2738,2503, 416, # 2656
+1643,4330, 806,1126, 229, 591,3946,1314,1981,1576,1837,1666, 347,1790, 977,3313, # 2672
+ 764,2861,1853, 688,2429,1920,1462,  77, 595, 415,2002,3034, 798,1192,4115,6144, # 2688
+2978,4331,3035,2695,2582,2072,2566, 430,2430,1727, 842,1396,3947,3702, 613, 377, # 2704
+ 278, 236,1417,3388,3314,3174, 757,1869, 107,3530,6145,1194, 623,2262, 207,1253, # 2720
+2167,3446,3948, 492,1117,1935, 536,1838,2757,1246,4332, 696,2095,2406,1393,1572, # 2736
+3175,1782, 583, 190, 253,1390,2230, 830,3126,3389, 934,3245,1703,1749,2979,1870, # 2752
+2545,1656,2204, 869,2346,4116,3176,1817, 496,1764,4644, 942,1504, 404,1903,1122, # 2768
+1580,3606,2945,1022, 515, 372,1735, 955,2431,3036,6146,2797,1110,2302,2798, 617, # 2784
+6147, 441, 762,1771,3447,3607,3608,1904, 840,3037,  86, 939,1385, 572,1370,2445, # 2800
+1336, 114,3703, 898, 294, 203,3315, 703,1583,2274, 429, 961,4333,1854,1951,3390, # 2816
+2373,3704,4334,1318,1381, 966,1911,2322,1006,1155, 309, 989, 458,2718,1795,1372, # 2832
+1203, 252,1689,1363,3177, 517,1936, 168,1490, 562, 193,3823,1042,4117,1835, 551, # 2848
+ 470,4645, 395, 489,3448,1871,1465,2583,2641, 417,1493, 279,1295, 511,1236,1119, # 2864
+  72,1231,1982,1812,3004, 871,1564, 984,3449,1667,2696,2096,4646,2347,2833,1673, # 2880
+3609, 695,3246,2668, 807,1183,4647, 890, 388,2333,1801,1457,2911,1765,1477,1031, # 2896
+3316,3317,1278,3391,2799,2292,2526, 163,3450,4335,2669,1404,1802,6148,2323,2407, # 2912
+1584,1728,1494,1824,1269, 298, 909,3318,1034,1632, 375, 776,1683,2061, 291, 210, # 2928
+1123, 809,1249,1002,2642,3038, 206,1011,2132, 144, 975, 882,1565, 342, 667, 754, # 2944
+1442,2143,1299,2303,2062, 447, 626,2205,1221,2739,2912,1144,1214,2206,2584, 760, # 2960
+1715, 614, 950,1281,2670,2621, 810, 577,1287,2546,4648, 242,2168, 250,2643, 691, # 2976
+ 123,2644, 647, 313,1029, 689,1357,2946,1650, 216, 771,1339,1306, 808,2063, 549, # 2992
+ 913,1371,2913,2914,6149,1466,1092,1174,1196,1311,2605,2396,1783,1796,3079, 406, # 3008
+2671,2117,3949,4649, 487,1825,2220,6150,2915, 448,2348,1073,6151,2397,1707, 130, # 3024
+ 900,1598, 329, 176,1959,2527,1620,6152,2275,4336,3319,1983,2191,3705,3610,2155, # 3040
+3706,1912,1513,1614,6153,1988, 646, 392,2304,1589,3320,3039,1826,1239,1352,1340, # 3056
+2916, 505,2567,1709,1437,2408,2547, 906,6154,2672, 384,1458,1594,1100,1329, 710, # 3072
+ 423,3531,2064,2231,2622,1989,2673,1087,1882, 333, 841,3005,1296,2882,2379, 580, # 3088
+1937,1827,1293,2585, 601, 574, 249,1772,4118,2079,1120, 645, 901,1176,1690, 795, # 3104
+2207, 478,1434, 516,1190,1530, 761,2080, 930,1264, 355, 435,1552, 644,1791, 987, # 3120
+ 220,1364,1163,1121,1538, 306,2169,1327,1222, 546,2645, 218, 241, 610,1704,3321, # 3136
+1984,1839,1966,2528, 451,6155,2586,3707,2568, 907,3178, 254,2947, 186,1845,4650, # 3152
+ 745, 432,1757, 428,1633, 888,2246,2221,2489,3611,2118,1258,1265, 956,3127,1784, # 3168
+4337,2490, 319, 510, 119, 457,3612, 274,2035,2007,4651,1409,3128, 970,2758, 590, # 3184
+2800, 661,2247,4652,2008,3950,1420,1549,3080,3322,3951,1651,1375,2111, 485,2491, # 3200
+1429,1156,6156,2548,2183,1495, 831,1840,2529,2446, 501,1657, 307,1894,3247,1341, # 3216
+ 666, 899,2156,1539,2549,1559, 886, 349,2208,3081,2305,1736,3824,2170,2759,1014, # 3232
+1913,1386, 542,1397,2948, 490, 368, 716, 362, 159, 282,2569,1129,1658,1288,1750, # 3248
+2674, 276, 649,2016, 751,1496, 658,1818,1284,1862,2209,2087,2512,3451, 622,2834, # 3264
+ 376, 117,1060,2053,1208,1721,1101,1443, 247,1250,3179,1792,3952,2760,2398,3953, # 3280
+6157,2144,3708, 446,2432,1151,2570,3452,2447,2761,2835,1210,2448,3082, 424,2222, # 3296
+1251,2449,2119,2836, 504,1581,4338, 602, 817, 857,3825,2349,2306, 357,3826,1470, # 3312
+1883,2883, 255, 958, 929,2917,3248, 302,4653,1050,1271,1751,2307,1952,1430,2697, # 3328
+2719,2359, 354,3180, 777, 158,2036,4339,1659,4340,4654,2308,2949,2248,1146,2232, # 3344
+3532,2720,1696,2623,3827,6158,3129,1550,2698,1485,1297,1428, 637, 931,2721,2145, # 3360
+ 914,2550,2587,  81,2450, 612, 827,2646,1242,4655,1118,2884, 472,1855,3181,3533, # 3376
+3534, 569,1353,2699,1244,1758,2588,4119,2009,2762,2171,3709,1312,1531,6159,1152, # 3392
+1938, 134,1830, 471,3710,2276,1112,1535,3323,3453,3535, 982,1337,2950, 488, 826, # 3408
+ 674,1058,1628,4120,2017, 522,2399, 211, 568,1367,3454, 350, 293,1872,1139,3249, # 3424
+1399,1946,3006,1300,2360,3324, 588, 736,6160,2606, 744, 669,3536,3828,6161,1358, # 3440
+ 199, 723, 848, 933, 851,1939,1505,1514,1338,1618,1831,4656,1634,3613, 443,2740, # 3456
+3829, 717,1947, 491,1914,6162,2551,1542,4121,1025,6163,1099,1223, 198,3040,2722, # 3472
+ 370, 410,1905,2589, 998,1248,3182,2380, 519,1449,4122,1710, 947, 928,1153,4341, # 3488
+2277, 344,2624,1511, 615, 105, 161,1212,1076,1960,3130,2054,1926,1175,1906,2473, # 3504
+ 414,1873,2801,6164,2309, 315,1319,3325, 318,2018,2146,2157, 963, 631, 223,4342, # 3520
+4343,2675, 479,3711,1197,2625,3712,2676,2361,6165,4344,4123,6166,2451,3183,1886, # 3536
+2184,1674,1330,1711,1635,1506, 799, 219,3250,3083,3954,1677,3713,3326,2081,3614, # 3552
+1652,2073,4657,1147,3041,1752, 643,1961, 147,1974,3955,6167,1716,2037, 918,3007, # 3568
+1994, 120,1537, 118, 609,3184,4345, 740,3455,1219, 332,1615,3830,6168,1621,2980, # 3584
+1582, 783, 212, 553,2350,3714,1349,2433,2082,4124, 889,6169,2310,1275,1410, 973, # 3600
+ 166,1320,3456,1797,1215,3185,2885,1846,2590,2763,4658, 629, 822,3008, 763, 940, # 3616
+1990,2862, 439,2409,1566,1240,1622, 926,1282,1907,2764, 654,2210,1607, 327,1130, # 3632
+3956,1678,1623,6170,2434,2192, 686, 608,3831,3715, 903,3957,3042,6171,2741,1522, # 3648
+1915,1105,1555,2552,1359, 323,3251,4346,3457, 738,1354,2553,2311,2334,1828,2003, # 3664
+3832,1753,2351,1227,6172,1887,4125,1478,6173,2410,1874,1712,1847, 520,1204,2607, # 3680
+ 264,4659, 836,2677,2102, 600,4660,3833,2278,3084,6174,4347,3615,1342, 640, 532, # 3696
+ 543,2608,1888,2400,2591,1009,4348,1497, 341,1737,3616,2723,1394, 529,3252,1321, # 3712
+ 983,4661,1515,2120, 971,2592, 924, 287,1662,3186,4349,2700,4350,1519, 908,1948, # 3728
+2452, 156, 796,1629,1486,2223,2055, 694,4126,1259,1036,3392,1213,2249,2742,1889, # 3744
+1230,3958,1015, 910, 408, 559,3617,4662, 746, 725, 935,4663,3959,3009,1289, 563, # 3760
+ 867,4664,3960,1567,2981,2038,2626, 988,2263,2381,4351, 143,2374, 704,1895,6175, # 3776
+1188,3716,2088, 673,3085,2362,4352, 484,1608,1921,2765,2918, 215, 904,3618,3537, # 3792
+ 894, 509, 976,3043,2701,3961,4353,2837,2982, 498,6176,6177,1102,3538,1332,3393, # 3808
+1487,1636,1637, 233, 245,3962, 383, 650, 995,3044, 460,1520,1206,2352, 749,3327, # 3824
+ 530, 700, 389,1438,1560,1773,3963,2264, 719,2951,2724,3834, 870,1832,1644,1000, # 3840
+ 839,2474,3717, 197,1630,3394, 365,2886,3964,1285,2133, 734, 922, 818,1106, 732, # 3856
+ 480,2083,1774,3458, 923,2279,1350, 221,3086,  85,2233,2234,3835,1585,3010,2147, # 3872
+1387,1705,2382,1619,2475, 133, 239,2802,1991,1016,2084,2383, 411,2838,1113, 651, # 3888
+1985,1160,3328, 990,1863,3087,1048,1276,2647, 265,2627,1599,3253,2056, 150, 638, # 3904
+2019, 656, 853, 326,1479, 680,1439,4354,1001,1759, 413,3459,3395,2492,1431, 459, # 3920
+4355,1125,3329,2265,1953,1450,2065,2863, 849, 351,2678,3131,3254,3255,1104,1577, # 3936
+ 227,1351,1645,2453,2193,1421,2887, 812,2121, 634,  95,2435, 201,2312,4665,1646, # 3952
+1671,2743,1601,2554,2702,2648,2280,1315,1366,2089,3132,1573,3718,3965,1729,1189, # 3968
+ 328,2679,1077,1940,1136, 558,1283, 964,1195, 621,2074,1199,1743,3460,3619,1896, # 3984
+1916,1890,3836,2952,1154,2112,1064, 862, 378,3011,2066,2113,2803,1568,2839,6178, # 4000
+3088,2919,1941,1660,2004,1992,2194, 142, 707,1590,1708,1624,1922,1023,1836,1233, # 4016
+1004,2313, 789, 741,3620,6179,1609,2411,1200,4127,3719,3720,4666,2057,3721, 593, # 4032
+2840, 367,2920,1878,6180,3461,1521, 628,1168, 692,2211,2649, 300, 720,2067,2571, # 4048
+2953,3396, 959,2504,3966,3539,3462,1977, 701,6181, 954,1043, 800, 681, 183,3722, # 4064
+1803,1730,3540,4128,2103, 815,2314, 174, 467, 230,2454,1093,2134, 755,3541,3397, # 4080
+1141,1162,6182,1738,2039, 270,3256,2513,1005,1647,2185,3837, 858,1679,1897,1719, # 4096
+2954,2324,1806, 402, 670, 167,4129,1498,2158,2104, 750,6183, 915, 189,1680,1551, # 4112
+ 455,4356,1501,2455, 405,1095,2955, 338,1586,1266,1819, 570, 641,1324, 237,1556, # 4128
+2650,1388,3723,6184,1368,2384,1343,1978,3089,2436, 879,3724, 792,1191, 758,3012, # 4144
+1411,2135,1322,4357, 240,4667,1848,3725,1574,6185, 420,3045,1546,1391, 714,4358, # 4160
+1967, 941,1864, 863, 664, 426, 560,1731,2680,1785,2864,1949,2363, 403,3330,1415, # 4176
+1279,2136,1697,2335, 204, 721,2097,3838,  90,6186,2085,2505, 191,3967, 124,2148, # 4192
+1376,1798,1178,1107,1898,1405, 860,4359,1243,1272,2375,2983,1558,2456,1638, 113, # 4208
+3621, 578,1923,2609, 880, 386,4130, 784,2186,2266,1422,2956,2172,1722, 497, 263, # 4224
+2514,1267,2412,2610, 177,2703,3542, 774,1927,1344, 616,1432,1595,1018, 172,4360, # 4240
+2325, 911,4361, 438,1468,3622, 794,3968,2024,2173,1681,1829,2957, 945, 895,3090, # 4256
+ 575,2212,2476, 475,2401,2681, 785,2744,1745,2293,2555,1975,3133,2865, 394,4668, # 4272
+3839, 635,4131, 639, 202,1507,2195,2766,1345,1435,2572,3726,1908,1184,1181,2457, # 4288
+3727,3134,4362, 843,2611, 437, 916,4669, 234, 769,1884,3046,3047,3623, 833,6187, # 4304
+1639,2250,2402,1355,1185,2010,2047, 999, 525,1732,1290,1488,2612, 948,1578,3728, # 4320
+2413,2477,1216,2725,2159, 334,3840,1328,3624,2921,1525,4132, 564,1056, 891,4363, # 4336
+1444,1698,2385,2251,3729,1365,2281,2235,1717,6188, 864,3841,2515, 444, 527,2767, # 4352
+2922,3625, 544, 461,6189, 566, 209,2437,3398,2098,1065,2068,3331,3626,3257,2137, # 4368  #last 512
+)
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/jpcntx.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/jpcntx.py
new file mode 100644
index 0000000..20044e4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/jpcntx.py
@@ -0,0 +1,233 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+
+# This is hiragana 2-char sequence table, the number in each cell represents its frequency category
+jp2CharContext = (
+(0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1),
+(2,4,0,4,0,3,0,4,0,3,4,4,4,2,4,3,3,4,3,2,3,3,4,2,3,3,3,2,4,1,4,3,3,1,5,4,3,4,3,4,3,5,3,0,3,5,4,2,0,3,1,0,3,3,0,3,3,0,1,1,0,4,3,0,3,3,0,4,0,2,0,3,5,5,5,5,4,0,4,1,0,3,4),
+(0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2),
+(0,4,0,5,0,5,0,4,0,4,5,4,4,3,5,3,5,1,5,3,4,3,4,4,3,4,3,3,4,3,5,4,4,3,5,5,3,5,5,5,3,5,5,3,4,5,5,3,1,3,2,0,3,4,0,4,2,0,4,2,1,5,3,2,3,5,0,4,0,2,0,5,4,4,5,4,5,0,4,0,0,4,4),
+(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
+(0,3,0,4,0,3,0,3,0,4,5,4,3,3,3,3,4,3,5,4,4,3,5,4,4,3,4,3,4,4,4,4,5,3,4,4,3,4,5,5,4,5,5,1,4,5,4,3,0,3,3,1,3,3,0,4,4,0,3,3,1,5,3,3,3,5,0,4,0,3,0,4,4,3,4,3,3,0,4,1,1,3,4),
+(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
+(0,4,0,3,0,3,0,4,0,3,4,4,3,2,2,1,2,1,3,1,3,3,3,3,3,4,3,1,3,3,5,3,3,0,4,3,0,5,4,3,3,5,4,4,3,4,4,5,0,1,2,0,1,2,0,2,2,0,1,0,0,5,2,2,1,4,0,3,0,1,0,4,4,3,5,4,3,0,2,1,0,4,3),
+(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
+(0,3,0,5,0,4,0,2,1,4,4,2,4,1,4,2,4,2,4,3,3,3,4,3,3,3,3,1,4,2,3,3,3,1,4,4,1,1,1,4,3,3,2,0,2,4,3,2,0,3,3,0,3,1,1,0,0,0,3,3,0,4,2,2,3,4,0,4,0,3,0,4,4,5,3,4,4,0,3,0,0,1,4),
+(1,4,0,4,0,4,0,4,0,3,5,4,4,3,4,3,5,4,3,3,4,3,5,4,4,4,4,3,4,2,4,3,3,1,5,4,3,2,4,5,4,5,5,4,4,5,4,4,0,3,2,2,3,3,0,4,3,1,3,2,1,4,3,3,4,5,0,3,0,2,0,4,5,5,4,5,4,0,4,0,0,5,4),
+(0,5,0,5,0,4,0,3,0,4,4,3,4,3,3,3,4,0,4,4,4,3,4,3,4,3,3,1,4,2,4,3,4,0,5,4,1,4,5,4,4,5,3,2,4,3,4,3,2,4,1,3,3,3,2,3,2,0,4,3,3,4,3,3,3,4,0,4,0,3,0,4,5,4,4,4,3,0,4,1,0,1,3),
+(0,3,1,4,0,3,0,2,0,3,4,4,3,1,4,2,3,3,4,3,4,3,4,3,4,4,3,2,3,1,5,4,4,1,4,4,3,5,4,4,3,5,5,4,3,4,4,3,1,2,3,1,2,2,0,3,2,0,3,1,0,5,3,3,3,4,3,3,3,3,4,4,4,4,5,4,2,0,3,3,2,4,3),
+(0,2,0,3,0,1,0,1,0,0,3,2,0,0,2,0,1,0,2,1,3,3,3,1,2,3,1,0,1,0,4,2,1,1,3,3,0,4,3,3,1,4,3,3,0,3,3,2,0,0,0,0,1,0,0,2,0,0,0,0,0,4,1,0,2,3,2,2,2,1,3,3,3,4,4,3,2,0,3,1,0,3,3),
+(0,4,0,4,0,3,0,3,0,4,4,4,3,3,3,3,3,3,4,3,4,2,4,3,4,3,3,2,4,3,4,5,4,1,4,5,3,5,4,5,3,5,4,0,3,5,5,3,1,3,3,2,2,3,0,3,4,1,3,3,2,4,3,3,3,4,0,4,0,3,0,4,5,4,4,5,3,0,4,1,0,3,4),
+(0,2,0,3,0,3,0,0,0,2,2,2,1,0,1,0,0,0,3,0,3,0,3,0,1,3,1,0,3,1,3,3,3,1,3,3,3,0,1,3,1,3,4,0,0,3,1,1,0,3,2,0,0,0,0,1,3,0,1,0,0,3,3,2,0,3,0,0,0,0,0,3,4,3,4,3,3,0,3,0,0,2,3),
+(2,3,0,3,0,2,0,1,0,3,3,4,3,1,3,1,1,1,3,1,4,3,4,3,3,3,0,0,3,1,5,4,3,1,4,3,2,5,5,4,4,4,4,3,3,4,4,4,0,2,1,1,3,2,0,1,2,0,0,1,0,4,1,3,3,3,0,3,0,1,0,4,4,4,5,5,3,0,2,0,0,4,4),
+(0,2,0,1,0,3,1,3,0,2,3,3,3,0,3,1,0,0,3,0,3,2,3,1,3,2,1,1,0,0,4,2,1,0,2,3,1,4,3,2,0,4,4,3,1,3,1,3,0,1,0,0,1,0,0,0,1,0,0,0,0,4,1,1,1,2,0,3,0,0,0,3,4,2,4,3,2,0,1,0,0,3,3),
+(0,1,0,4,0,5,0,4,0,2,4,4,2,3,3,2,3,3,5,3,3,3,4,3,4,2,3,0,4,3,3,3,4,1,4,3,2,1,5,5,3,4,5,1,3,5,4,2,0,3,3,0,1,3,0,4,2,0,1,3,1,4,3,3,3,3,0,3,0,1,0,3,4,4,4,5,5,0,3,0,1,4,5),
+(0,2,0,3,0,3,0,0,0,2,3,1,3,0,4,0,1,1,3,0,3,4,3,2,3,1,0,3,3,2,3,1,3,0,2,3,0,2,1,4,1,2,2,0,0,3,3,0,0,2,0,0,0,1,0,0,0,0,2,2,0,3,2,1,3,3,0,2,0,2,0,0,3,3,1,2,4,0,3,0,2,2,3),
+(2,4,0,5,0,4,0,4,0,2,4,4,4,3,4,3,3,3,1,2,4,3,4,3,4,4,5,0,3,3,3,3,2,0,4,3,1,4,3,4,1,4,4,3,3,4,4,3,1,2,3,0,4,2,0,4,1,0,3,3,0,4,3,3,3,4,0,4,0,2,0,3,5,3,4,5,2,0,3,0,0,4,5),
+(0,3,0,4,0,1,0,1,0,1,3,2,2,1,3,0,3,0,2,0,2,0,3,0,2,0,0,0,1,0,1,1,0,0,3,1,0,0,0,4,0,3,1,0,2,1,3,0,0,0,0,0,0,3,0,0,0,0,0,0,0,4,2,2,3,1,0,3,0,0,0,1,4,4,4,3,0,0,4,0,0,1,4),
+(1,4,1,5,0,3,0,3,0,4,5,4,4,3,5,3,3,4,4,3,4,1,3,3,3,3,2,1,4,1,5,4,3,1,4,4,3,5,4,4,3,5,4,3,3,4,4,4,0,3,3,1,2,3,0,3,1,0,3,3,0,5,4,4,4,4,4,4,3,3,5,4,4,3,3,5,4,0,3,2,0,4,4),
+(0,2,0,3,0,1,0,0,0,1,3,3,3,2,4,1,3,0,3,1,3,0,2,2,1,1,0,0,2,0,4,3,1,0,4,3,0,4,4,4,1,4,3,1,1,3,3,1,0,2,0,0,1,3,0,0,0,0,2,0,0,4,3,2,4,3,5,4,3,3,3,4,3,3,4,3,3,0,2,1,0,3,3),
+(0,2,0,4,0,3,0,2,0,2,5,5,3,4,4,4,4,1,4,3,3,0,4,3,4,3,1,3,3,2,4,3,0,3,4,3,0,3,4,4,2,4,4,0,4,5,3,3,2,2,1,1,1,2,0,1,5,0,3,3,2,4,3,3,3,4,0,3,0,2,0,4,4,3,5,5,0,0,3,0,2,3,3),
+(0,3,0,4,0,3,0,1,0,3,4,3,3,1,3,3,3,0,3,1,3,0,4,3,3,1,1,0,3,0,3,3,0,0,4,4,0,1,5,4,3,3,5,0,3,3,4,3,0,2,0,1,1,1,0,1,3,0,1,2,1,3,3,2,3,3,0,3,0,1,0,1,3,3,4,4,1,0,1,2,2,1,3),
+(0,1,0,4,0,4,0,3,0,1,3,3,3,2,3,1,1,0,3,0,3,3,4,3,2,4,2,0,1,0,4,3,2,0,4,3,0,5,3,3,2,4,4,4,3,3,3,4,0,1,3,0,0,1,0,0,1,0,0,0,0,4,2,3,3,3,0,3,0,0,0,4,4,4,5,3,2,0,3,3,0,3,5),
+(0,2,0,3,0,0,0,3,0,1,3,0,2,0,0,0,1,0,3,1,1,3,3,0,0,3,0,0,3,0,2,3,1,0,3,1,0,3,3,2,0,4,2,2,0,2,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,2,1,2,0,1,0,1,0,0,0,1,3,1,2,0,0,0,1,0,0,1,4),
+(0,3,0,3,0,5,0,1,0,2,4,3,1,3,3,2,1,1,5,2,1,0,5,1,2,0,0,0,3,3,2,2,3,2,4,3,0,0,3,3,1,3,3,0,2,5,3,4,0,3,3,0,1,2,0,2,2,0,3,2,0,2,2,3,3,3,0,2,0,1,0,3,4,4,2,5,4,0,3,0,0,3,5),
+(0,3,0,3,0,3,0,1,0,3,3,3,3,0,3,0,2,0,2,1,1,0,2,0,1,0,0,0,2,1,0,0,1,0,3,2,0,0,3,3,1,2,3,1,0,3,3,0,0,1,0,0,0,0,0,2,0,0,0,0,0,2,3,1,2,3,0,3,0,1,0,3,2,1,0,4,3,0,1,1,0,3,3),
+(0,4,0,5,0,3,0,3,0,4,5,5,4,3,5,3,4,3,5,3,3,2,5,3,4,4,4,3,4,3,4,5,5,3,4,4,3,4,4,5,4,4,4,3,4,5,5,4,2,3,4,2,3,4,0,3,3,1,4,3,2,4,3,3,5,5,0,3,0,3,0,5,5,5,5,4,4,0,4,0,1,4,4),
+(0,4,0,4,0,3,0,3,0,3,5,4,4,2,3,2,5,1,3,2,5,1,4,2,3,2,3,3,4,3,3,3,3,2,5,4,1,3,3,5,3,4,4,0,4,4,3,1,1,3,1,0,2,3,0,2,3,0,3,0,0,4,3,1,3,4,0,3,0,2,0,4,4,4,3,4,5,0,4,0,0,3,4),
+(0,3,0,3,0,3,1,2,0,3,4,4,3,3,3,0,2,2,4,3,3,1,3,3,3,1,1,0,3,1,4,3,2,3,4,4,2,4,4,4,3,4,4,3,2,4,4,3,1,3,3,1,3,3,0,4,1,0,2,2,1,4,3,2,3,3,5,4,3,3,5,4,4,3,3,0,4,0,3,2,2,4,4),
+(0,2,0,1,0,0,0,0,0,1,2,1,3,0,0,0,0,0,2,0,1,2,1,0,0,1,0,0,0,0,3,0,0,1,0,1,1,3,1,0,0,0,1,1,0,1,1,0,0,0,0,0,2,0,0,0,0,0,0,0,0,1,1,2,2,0,3,4,0,0,0,1,1,0,0,1,0,0,0,0,0,1,1),
+(0,1,0,0,0,1,0,0,0,0,4,0,4,1,4,0,3,0,4,0,3,0,4,0,3,0,3,0,4,1,5,1,4,0,0,3,0,5,0,5,2,0,1,0,0,0,2,1,4,0,1,3,0,0,3,0,0,3,1,1,4,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0),
+(1,4,0,5,0,3,0,2,0,3,5,4,4,3,4,3,5,3,4,3,3,0,4,3,3,3,3,3,3,2,4,4,3,1,3,4,4,5,4,4,3,4,4,1,3,5,4,3,3,3,1,2,2,3,3,1,3,1,3,3,3,5,3,3,4,5,0,3,0,3,0,3,4,3,4,4,3,0,3,0,2,4,3),
+(0,1,0,4,0,0,0,0,0,1,4,0,4,1,4,2,4,0,3,0,1,0,1,0,0,0,0,0,2,0,3,1,1,1,0,3,0,0,0,1,2,1,0,0,1,1,1,1,0,1,0,0,0,1,0,0,3,0,0,0,0,3,2,0,2,2,0,1,0,0,0,2,3,2,3,3,0,0,0,0,2,1,0),
+(0,5,1,5,0,3,0,3,0,5,4,4,5,1,5,3,3,0,4,3,4,3,5,3,4,3,3,2,4,3,4,3,3,0,3,3,1,4,4,3,4,4,4,3,4,5,5,3,2,3,1,1,3,3,1,3,1,1,3,3,2,4,5,3,3,5,0,4,0,3,0,4,4,3,5,3,3,0,3,4,0,4,3),
+(0,5,0,5,0,3,0,2,0,4,4,3,5,2,4,3,3,3,4,4,4,3,5,3,5,3,3,1,4,0,4,3,3,0,3,3,0,4,4,4,4,5,4,3,3,5,5,3,2,3,1,2,3,2,0,1,0,0,3,2,2,4,4,3,1,5,0,4,0,3,0,4,3,1,3,2,1,0,3,3,0,3,3),
+(0,4,0,5,0,5,0,4,0,4,5,5,5,3,4,3,3,2,5,4,4,3,5,3,5,3,4,0,4,3,4,4,3,2,4,4,3,4,5,4,4,5,5,0,3,5,5,4,1,3,3,2,3,3,1,3,1,0,4,3,1,4,4,3,4,5,0,4,0,2,0,4,3,4,4,3,3,0,4,0,0,5,5),
+(0,4,0,4,0,5,0,1,1,3,3,4,4,3,4,1,3,0,5,1,3,0,3,1,3,1,1,0,3,0,3,3,4,0,4,3,0,4,4,4,3,4,4,0,3,5,4,1,0,3,0,0,2,3,0,3,1,0,3,1,0,3,2,1,3,5,0,3,0,1,0,3,2,3,3,4,4,0,2,2,0,4,4),
+(2,4,0,5,0,4,0,3,0,4,5,5,4,3,5,3,5,3,5,3,5,2,5,3,4,3,3,4,3,4,5,3,2,1,5,4,3,2,3,4,5,3,4,1,2,5,4,3,0,3,3,0,3,2,0,2,3,0,4,1,0,3,4,3,3,5,0,3,0,1,0,4,5,5,5,4,3,0,4,2,0,3,5),
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+(0,1,0,3,0,3,0,1,0,1,3,3,3,2,3,3,3,0,3,0,0,0,3,1,3,0,0,0,2,2,2,3,0,0,3,2,0,1,2,4,1,3,3,0,0,3,3,3,0,1,0,0,2,1,0,0,3,0,3,1,0,3,0,0,1,3,0,2,0,1,0,3,3,1,3,3,0,0,1,1,0,3,3),
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+(0,5,0,4,0,5,0,2,0,4,5,5,3,3,4,3,3,1,5,4,4,2,4,4,4,3,4,2,4,3,5,5,4,3,3,4,3,3,5,5,4,5,5,1,3,4,5,3,1,4,3,1,3,3,0,3,3,1,4,3,1,4,5,3,3,5,0,4,0,3,0,5,3,3,1,4,3,0,4,0,1,5,3),
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+(0,0,0,1,0,0,0,0,0,0,2,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,1,0,0,1,0,0,0,0,0,3),
+(0,1,0,3,0,4,0,3,0,2,4,3,1,0,3,2,2,1,3,1,2,2,3,1,1,1,2,1,3,0,1,2,0,1,3,2,1,3,0,5,5,1,0,0,1,3,2,1,0,3,0,0,1,0,0,0,0,0,3,4,0,1,1,1,3,2,0,2,0,1,0,2,3,3,1,2,3,0,1,0,1,0,4),
+(0,0,0,1,0,3,0,3,0,2,2,1,0,0,4,0,3,0,3,1,3,0,3,0,3,0,1,0,3,0,3,1,3,0,3,3,0,0,1,2,1,1,1,0,1,2,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,2,2,1,2,0,0,2,0,0,0,0,2,3,3,3,3,0,0,0,0,1,4),
+(0,0,0,3,0,3,0,0,0,0,3,1,1,0,3,0,1,0,2,0,1,0,0,0,0,0,0,0,1,0,3,0,2,0,2,3,0,0,2,2,3,1,2,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,2,0,0,0,0,2,3),
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+(0,3,0,3,0,3,0,3,0,3,3,4,3,2,3,2,3,0,4,3,3,3,3,3,3,3,3,0,3,2,4,3,3,1,3,4,3,4,4,4,3,4,4,3,2,4,4,1,0,2,0,0,1,1,0,2,0,0,3,1,0,5,3,2,1,3,0,3,0,1,2,4,3,2,4,3,3,0,3,2,0,4,4),
+(0,3,0,3,0,1,0,0,0,1,4,3,3,2,3,1,3,1,4,2,3,2,4,2,3,4,3,0,2,2,3,3,3,0,3,3,3,0,3,4,1,3,3,0,3,4,3,3,0,1,1,0,1,0,0,0,4,0,3,0,0,3,1,2,1,3,0,4,0,1,0,4,3,3,4,3,3,0,2,0,0,3,3),
+(0,3,0,4,0,1,0,3,0,3,4,3,3,0,3,3,3,1,3,1,3,3,4,3,3,3,0,0,3,1,5,3,3,1,3,3,2,5,4,3,3,4,5,3,2,5,3,4,0,1,0,0,0,0,0,2,0,0,1,1,0,4,2,2,1,3,0,3,0,2,0,4,4,3,5,3,2,0,1,1,0,3,4),
+(0,5,0,4,0,5,0,2,0,4,4,3,3,2,3,3,3,1,4,3,4,1,5,3,4,3,4,0,4,2,4,3,4,1,5,4,0,4,4,4,4,5,4,1,3,5,4,2,1,4,1,1,3,2,0,3,1,0,3,2,1,4,3,3,3,4,0,4,0,3,0,4,4,4,3,3,3,0,4,2,0,3,4),
+(1,4,0,4,0,3,0,1,0,3,3,3,1,1,3,3,2,2,3,3,1,0,3,2,2,1,2,0,3,1,2,1,2,0,3,2,0,2,2,3,3,4,3,0,3,3,1,2,0,1,1,3,1,2,0,0,3,0,1,1,0,3,2,2,3,3,0,3,0,0,0,2,3,3,4,3,3,0,1,0,0,1,4),
+(0,4,0,4,0,4,0,0,0,3,4,4,3,1,4,2,3,2,3,3,3,1,4,3,4,0,3,0,4,2,3,3,2,2,5,4,2,1,3,4,3,4,3,1,3,3,4,2,0,2,1,0,3,3,0,0,2,0,3,1,0,4,4,3,4,3,0,4,0,1,0,2,4,4,4,4,4,0,3,2,0,3,3),
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+(0,3,0,4,0,5,0,3,0,3,4,4,3,2,3,2,3,3,3,3,3,2,4,3,3,2,2,0,3,3,3,3,3,1,3,3,3,0,4,4,3,4,4,1,1,4,4,2,0,3,1,0,1,1,0,4,1,0,2,3,1,3,3,1,3,4,0,3,0,1,0,3,1,3,0,0,1,0,2,0,0,4,4),
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+(0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,1,1,0,0,1,1,0,0,0,4,2,1,1,0,1,0,3,2,0,0,3,1,1,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,1,0,0,0,2,0,0,0,1,4,0,4,2,1,0,0,0,0,0,1),
+(0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,1,0,0,0,0,0,0,1,0,1,0,0,0,0,3,1,0,0,0,2,0,2,1,0,0,1,2,1,0,1,1,0,0,3,0,0,0,0,0,0,0,0,0,0,0,1,3,1,0,0,0,0,0,1,0,0,2,1,0,0,0,0,0,0,0,0,2),
+(0,4,0,4,0,4,0,3,0,4,4,3,4,2,4,3,2,0,4,4,4,3,5,3,5,3,3,2,4,2,4,3,4,3,1,4,0,2,3,4,4,4,3,3,3,4,4,4,3,4,1,3,4,3,2,1,2,1,3,3,3,4,4,3,3,5,0,4,0,3,0,4,3,3,3,2,1,0,3,0,0,3,3),
+(0,4,0,3,0,3,0,3,0,3,5,5,3,3,3,3,4,3,4,3,3,3,4,4,4,3,3,3,3,4,3,5,3,3,1,3,2,4,5,5,5,5,4,3,4,5,5,3,2,2,3,3,3,3,2,3,3,1,2,3,2,4,3,3,3,4,0,4,0,2,0,4,3,2,2,1,2,0,3,0,0,4,1),
+)
+
+class JapaneseContextAnalysis(object):
+    NUM_OF_CATEGORY = 6
+    DONT_KNOW = -1
+    ENOUGH_REL_THRESHOLD = 100
+    MAX_REL_THRESHOLD = 1000
+    MINIMUM_DATA_THRESHOLD = 4
+
+    def __init__(self):
+        self._total_rel = None
+        self._rel_sample = None
+        self._need_to_skip_char_num = None
+        self._last_char_order = None
+        self._done = None
+        self.reset()
+
+    def reset(self):
+        self._total_rel = 0  # total sequence received
+        # category counters, each integer counts sequence in its category
+        self._rel_sample = [0] * self.NUM_OF_CATEGORY
+        # if last byte in current buffer is not the last byte of a character,
+        # we need to know how many bytes to skip in next buffer
+        self._need_to_skip_char_num = 0
+        self._last_char_order = -1  # The order of previous char
+        # If this flag is set to True, detection is done and conclusion has
+        # been made
+        self._done = False
+
+    def feed(self, byte_str, num_bytes):
+        if self._done:
+            return
+
+        # The buffer we got is byte oriented, and a character may span in more than one
+        # buffers. In case the last one or two byte in last buffer is not
+        # complete, we record how many byte needed to complete that character
+        # and skip these bytes here.  We can choose to record those bytes as
+        # well and analyse the character once it is complete, but since a
+        # character will not make much difference, by simply skipping
+        # this character will simply our logic and improve performance.
+        i = self._need_to_skip_char_num
+        while i < num_bytes:
+            order, char_len = self.get_order(byte_str[i:i + 2])
+            i += char_len
+            if i > num_bytes:
+                self._need_to_skip_char_num = i - num_bytes
+                self._last_char_order = -1
+            else:
+                if (order != -1) and (self._last_char_order != -1):
+                    self._total_rel += 1
+                    if self._total_rel > self.MAX_REL_THRESHOLD:
+                        self._done = True
+                        break
+                    self._rel_sample[jp2CharContext[self._last_char_order][order]] += 1
+                self._last_char_order = order
+
+    def got_enough_data(self):
+        return self._total_rel > self.ENOUGH_REL_THRESHOLD
+
+    def get_confidence(self):
+        # This is just one way to calculate confidence. It works well for me.
+        if self._total_rel > self.MINIMUM_DATA_THRESHOLD:
+            return (self._total_rel - self._rel_sample[0]) / self._total_rel
+        else:
+            return self.DONT_KNOW
+
+    def get_order(self, byte_str):
+        return -1, 1
+
+class SJISContextAnalysis(JapaneseContextAnalysis):
+    def __init__(self):
+        super(SJISContextAnalysis, self).__init__()
+        self._charset_name = "SHIFT_JIS"
+
+    @property
+    def charset_name(self):
+        return self._charset_name
+
+    def get_order(self, byte_str):
+        if not byte_str:
+            return -1, 1
+        # find out current char's byte length
+        first_char = byte_str[0]
+        if (0x81 <= first_char <= 0x9F) or (0xE0 <= first_char <= 0xFC):
+            char_len = 2
+            if (first_char == 0x87) or (0xFA <= first_char <= 0xFC):
+                self._charset_name = "CP932"
+        else:
+            char_len = 1
+
+        # return its order if it is hiragana
+        if len(byte_str) > 1:
+            second_char = byte_str[1]
+            if (first_char == 202) and (0x9F <= second_char <= 0xF1):
+                return second_char - 0x9F, char_len
+
+        return -1, char_len
+
+class EUCJPContextAnalysis(JapaneseContextAnalysis):
+    def get_order(self, byte_str):
+        if not byte_str:
+            return -1, 1
+        # find out current char's byte length
+        first_char = byte_str[0]
+        if (first_char == 0x8E) or (0xA1 <= first_char <= 0xFE):
+            char_len = 2
+        elif first_char == 0x8F:
+            char_len = 3
+        else:
+            char_len = 1
+
+        # return its order if it is hiragana
+        if len(byte_str) > 1:
+            second_char = byte_str[1]
+            if (first_char == 0xA4) and (0xA1 <= second_char <= 0xF3):
+                return second_char - 0xA1, char_len
+
+        return -1, char_len
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langbulgarianmodel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langbulgarianmodel.py
new file mode 100644
index 0000000..2aa4fb2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langbulgarianmodel.py
@@ -0,0 +1,228 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# Character Mapping Table:
+# this table is modified base on win1251BulgarianCharToOrderMap, so
+# only number <64 is sure valid
+
+Latin5_BulgarianCharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 77, 90, 99,100, 72,109,107,101, 79,185, 81,102, 76, 94, 82,  # 40
+110,186,108, 91, 74,119, 84, 96,111,187,115,253,253,253,253,253,  # 50
+253, 65, 69, 70, 66, 63, 68,112,103, 92,194,104, 95, 86, 87, 71,  # 60
+116,195, 85, 93, 97,113,196,197,198,199,200,253,253,253,253,253,  # 70
+194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,  # 80
+210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,  # 90
+ 81,226,227,228,229,230,105,231,232,233,234,235,236, 45,237,238,  # a0
+ 31, 32, 35, 43, 37, 44, 55, 47, 40, 59, 33, 46, 38, 36, 41, 30,  # b0
+ 39, 28, 34, 51, 48, 49, 53, 50, 54, 57, 61,239, 67,240, 60, 56,  # c0
+  1, 18,  9, 20, 11,  3, 23, 15,  2, 26, 12, 10, 14,  6,  4, 13,  # d0
+  7,  8,  5, 19, 29, 25, 22, 21, 27, 24, 17, 75, 52,241, 42, 16,  # e0
+ 62,242,243,244, 58,245, 98,246,247,248,249,250,251, 91,252,253,  # f0
+)
+
+win1251BulgarianCharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 77, 90, 99,100, 72,109,107,101, 79,185, 81,102, 76, 94, 82,  # 40
+110,186,108, 91, 74,119, 84, 96,111,187,115,253,253,253,253,253,  # 50
+253, 65, 69, 70, 66, 63, 68,112,103, 92,194,104, 95, 86, 87, 71,  # 60
+116,195, 85, 93, 97,113,196,197,198,199,200,253,253,253,253,253,  # 70
+206,207,208,209,210,211,212,213,120,214,215,216,217,218,219,220,  # 80
+221, 78, 64, 83,121, 98,117,105,222,223,224,225,226,227,228,229,  # 90
+ 88,230,231,232,233,122, 89,106,234,235,236,237,238, 45,239,240,  # a0
+ 73, 80,118,114,241,242,243,244,245, 62, 58,246,247,248,249,250,  # b0
+ 31, 32, 35, 43, 37, 44, 55, 47, 40, 59, 33, 46, 38, 36, 41, 30,  # c0
+ 39, 28, 34, 51, 48, 49, 53, 50, 54, 57, 61,251, 67,252, 60, 56,  # d0
+  1, 18,  9, 20, 11,  3, 23, 15,  2, 26, 12, 10, 14,  6,  4, 13,  # e0
+  7,  8,  5, 19, 29, 25, 22, 21, 27, 24, 17, 75, 52,253, 42, 16,  # f0
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 96.9392%
+# first 1024 sequences:3.0618%
+# rest  sequences:     0.2992%
+# negative sequences:  0.0020%
+BulgarianLangModel = (
+0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,2,3,3,3,3,3,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,2,2,3,2,2,1,2,2,
+3,1,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,3,3,3,3,3,3,3,0,3,0,1,
+0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,2,3,3,3,3,3,3,3,3,0,3,1,0,
+0,1,0,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,1,3,2,3,3,3,3,3,3,3,3,0,3,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,1,3,2,3,3,3,3,3,3,3,3,0,3,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,2,3,2,2,1,3,3,3,3,2,2,2,1,1,2,0,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,2,3,2,2,3,3,1,1,2,3,3,2,3,3,3,3,2,1,2,0,2,0,3,0,0,
+0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,1,3,3,3,3,3,2,3,2,3,3,3,3,3,2,3,3,1,3,0,3,0,2,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,3,1,3,3,2,3,3,3,1,3,3,2,3,2,2,2,0,0,2,0,2,0,2,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,3,3,0,3,3,3,2,2,3,3,3,1,2,2,3,2,1,1,2,0,2,0,0,0,0,
+1,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,2,3,3,1,2,3,2,2,2,3,3,3,3,3,2,2,3,1,2,0,2,1,2,0,0,
+0,0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,1,3,3,3,3,3,2,3,3,3,2,3,3,2,3,2,2,2,3,1,2,0,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,3,3,3,3,1,1,1,2,2,1,3,1,3,2,2,3,0,0,1,0,1,0,1,0,0,
+0,0,0,1,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,2,2,3,2,2,3,1,2,1,1,1,2,3,1,3,1,2,2,0,1,1,1,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,1,3,2,2,3,3,1,2,3,1,1,3,3,3,3,1,2,2,1,1,1,0,2,0,2,0,1,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,2,2,3,3,3,2,2,1,1,2,0,2,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,0,1,2,1,3,3,2,3,3,3,3,3,2,3,2,1,0,3,1,2,1,2,1,2,3,2,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,1,1,2,3,3,3,3,3,3,3,3,3,3,3,3,0,0,3,1,3,3,2,3,3,2,2,2,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,3,0,3,3,3,3,3,2,1,1,2,1,3,3,0,3,1,1,1,1,3,2,0,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,2,2,2,3,3,3,3,3,3,3,3,3,3,3,1,1,3,1,3,3,2,3,2,2,2,3,0,2,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,2,3,3,2,2,3,2,1,1,1,1,1,3,1,3,1,1,0,0,0,1,0,0,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,2,3,2,0,3,2,0,3,0,2,0,0,2,1,3,1,0,0,1,0,0,0,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,2,1,1,1,1,2,1,1,2,1,1,1,2,2,1,2,1,1,1,0,1,1,0,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,2,1,3,1,1,2,1,3,2,1,1,0,1,2,3,2,1,1,1,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,3,2,2,1,0,1,0,0,1,0,0,0,2,1,0,3,0,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,2,3,2,3,3,1,3,2,1,1,1,2,1,1,2,1,3,0,1,0,0,0,1,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,1,2,2,3,3,2,3,2,2,2,3,1,2,2,1,1,2,1,1,2,2,0,1,1,0,1,0,2,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,2,1,3,1,0,2,2,1,3,2,1,0,0,2,0,2,0,1,0,0,0,0,0,0,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,3,1,2,0,2,3,1,2,3,2,0,1,3,1,2,1,1,1,0,0,1,0,0,2,2,2,3,
+2,2,2,2,1,2,1,1,2,2,1,1,2,0,1,1,1,0,0,1,1,0,0,1,1,0,0,0,1,1,0,1,
+3,3,3,3,3,2,1,2,2,1,2,0,2,0,1,0,1,2,1,2,1,1,0,0,0,1,0,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,
+3,3,2,3,3,1,1,3,1,0,3,2,1,0,0,0,1,2,0,2,0,1,0,0,0,1,0,1,2,1,2,2,
+1,1,1,1,1,1,1,2,2,2,1,1,1,1,1,1,1,0,1,2,1,1,1,0,0,0,0,0,1,1,0,0,
+3,1,0,1,0,2,3,2,2,2,3,2,2,2,2,2,1,0,2,1,2,1,1,1,0,1,2,1,2,2,2,1,
+1,1,2,2,2,2,1,2,1,1,0,1,2,1,2,2,2,1,1,1,0,1,1,1,1,2,0,1,0,0,0,0,
+2,3,2,3,3,0,0,2,1,0,2,1,0,0,0,0,2,3,0,2,0,0,0,0,0,1,0,0,2,0,1,2,
+2,1,2,1,2,2,1,1,1,2,1,1,1,0,1,2,2,1,1,1,1,1,0,1,1,1,0,0,1,2,0,0,
+3,3,2,2,3,0,2,3,1,1,2,0,0,0,1,0,0,2,0,2,0,0,0,1,0,1,0,1,2,0,2,2,
+1,1,1,1,2,1,0,1,2,2,2,1,1,1,1,1,1,1,0,1,1,1,0,0,0,0,0,0,1,1,0,0,
+2,3,2,3,3,0,0,3,0,1,1,0,1,0,0,0,2,2,1,2,0,0,0,0,0,0,0,0,2,0,1,2,
+2,2,1,1,1,1,1,2,2,2,1,0,2,0,1,0,1,0,0,1,0,1,0,0,1,0,0,0,0,1,0,0,
+3,3,3,3,2,2,2,2,2,0,2,1,1,1,1,2,1,2,1,1,0,2,0,1,0,1,0,0,2,0,1,2,
+1,1,1,1,1,1,1,2,2,1,1,0,2,0,1,0,2,0,0,1,1,1,0,0,2,0,0,0,1,1,0,0,
+2,3,3,3,3,1,0,0,0,0,0,0,0,0,0,0,2,0,0,1,1,0,0,0,0,0,0,1,2,0,1,2,
+2,2,2,1,1,2,1,1,2,2,2,1,2,0,1,1,1,1,1,1,0,1,1,1,1,0,0,1,1,1,0,0,
+2,3,3,3,3,0,2,2,0,2,1,0,0,0,1,1,1,2,0,2,0,0,0,3,0,0,0,0,2,0,2,2,
+1,1,1,2,1,2,1,1,2,2,2,1,2,0,1,1,1,0,1,1,1,1,0,2,1,0,0,0,1,1,0,0,
+2,3,3,3,3,0,2,1,0,0,2,0,0,0,0,0,1,2,0,2,0,0,0,0,0,0,0,0,2,0,1,2,
+1,1,1,2,1,1,1,1,2,2,2,0,1,0,1,1,1,0,0,1,1,1,0,0,1,0,0,0,0,1,0,0,
+3,3,2,2,3,0,1,0,1,0,0,0,0,0,0,0,1,1,0,3,0,0,0,0,0,0,0,0,1,0,2,2,
+1,1,1,1,1,2,1,1,2,2,1,2,2,1,0,1,1,1,1,1,0,1,0,0,1,0,0,0,1,1,0,0,
+3,1,0,1,0,2,2,2,2,3,2,1,1,1,2,3,0,0,1,0,2,1,1,0,1,1,1,1,2,1,1,1,
+1,2,2,1,2,1,2,2,1,1,0,1,2,1,2,2,1,1,1,0,0,1,1,1,2,1,0,1,0,0,0,0,
+2,1,0,1,0,3,1,2,2,2,2,1,2,2,1,1,1,0,2,1,2,2,1,1,2,1,1,0,2,1,1,1,
+1,2,2,2,2,2,2,2,1,2,0,1,1,0,2,1,1,1,1,1,0,0,1,1,1,1,0,1,0,0,0,0,
+2,1,1,1,1,2,2,2,2,1,2,2,2,1,2,2,1,1,2,1,2,3,2,2,1,1,1,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,3,2,0,1,2,0,1,2,1,1,0,1,0,1,2,1,2,0,0,0,1,1,0,0,0,1,0,0,2,
+1,1,0,0,1,1,0,1,1,1,1,0,2,0,1,1,1,0,0,1,1,0,0,0,0,1,0,0,0,1,0,0,
+2,0,0,0,0,1,2,2,2,2,2,2,2,1,2,1,1,1,1,1,1,1,0,1,1,1,1,1,2,1,1,1,
+1,2,2,2,2,1,1,2,1,2,1,1,1,0,2,1,2,1,1,1,0,2,1,1,1,1,0,1,0,0,0,0,
+3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
+1,1,0,1,0,1,1,1,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,3,2,0,0,0,0,1,0,0,0,0,0,0,1,1,0,2,0,0,0,0,0,0,0,0,1,0,1,2,
+1,1,1,1,1,1,0,0,2,2,2,2,2,0,1,1,0,1,1,1,1,1,0,0,1,0,0,0,1,1,0,1,
+2,3,1,2,1,0,1,1,0,2,2,2,0,0,1,0,0,1,1,1,1,0,0,0,0,0,0,0,1,0,1,2,
+1,1,1,1,2,1,1,1,1,1,1,1,1,0,1,1,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,
+2,2,2,2,2,0,0,2,0,0,2,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,2,0,2,2,
+1,1,1,1,1,0,0,1,2,1,1,0,1,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,2,2,0,0,2,0,1,1,0,0,0,1,0,0,2,0,2,0,0,0,0,0,0,0,0,0,0,1,1,
+0,0,0,1,1,1,1,1,1,1,1,1,1,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,3,2,0,0,1,0,0,1,0,0,0,0,0,0,1,0,2,0,0,0,1,0,0,0,0,0,0,0,2,
+1,1,0,0,1,0,0,0,1,1,0,0,1,0,1,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
+2,1,2,2,2,1,2,1,2,2,1,1,2,1,1,1,0,1,1,1,1,2,0,1,0,1,1,1,1,0,1,1,
+1,1,2,1,1,1,1,1,1,0,0,1,2,1,1,1,1,1,1,0,0,1,1,1,0,0,0,0,0,0,0,0,
+1,0,0,1,3,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,2,1,0,0,1,0,2,0,0,0,0,0,1,1,1,0,1,0,0,0,0,0,0,0,0,2,0,0,1,
+0,2,0,1,0,0,1,1,2,0,1,0,1,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,2,2,0,1,1,0,2,1,0,1,1,1,0,0,1,0,2,0,1,0,0,0,0,0,0,0,0,0,1,
+0,1,0,0,1,0,0,0,1,1,0,0,1,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,2,2,0,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,1,
+0,1,0,1,1,1,0,0,1,1,1,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
+2,0,1,0,0,1,2,1,1,1,1,1,1,2,2,1,0,0,1,0,1,0,0,0,0,1,1,1,1,0,0,0,
+1,1,2,1,1,1,1,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,1,2,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0,1,
+0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,1,2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
+0,1,1,0,1,1,1,0,0,1,0,0,1,0,1,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,
+1,0,1,0,0,1,1,1,1,1,1,1,1,1,1,1,0,0,1,0,2,0,0,2,0,1,0,0,1,0,0,1,
+1,1,0,0,1,1,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,
+1,1,1,1,1,1,1,2,0,0,0,0,0,0,2,1,0,1,1,0,0,1,1,1,0,1,0,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,0,1,1,1,1,1,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+)
+
+Latin5BulgarianModel = {
+  'char_to_order_map': Latin5_BulgarianCharToOrderMap,
+  'precedence_matrix': BulgarianLangModel,
+  'typical_positive_ratio': 0.969392,
+  'keep_english_letter': False,
+  'charset_name': "ISO-8859-5",
+  'language': 'Bulgairan',
+}
+
+Win1251BulgarianModel = {
+  'char_to_order_map': win1251BulgarianCharToOrderMap,
+  'precedence_matrix': BulgarianLangModel,
+  'typical_positive_ratio': 0.969392,
+  'keep_english_letter': False,
+  'charset_name': "windows-1251",
+  'language': 'Bulgarian',
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langcyrillicmodel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langcyrillicmodel.py
new file mode 100644
index 0000000..e5f9a1f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langcyrillicmodel.py
@@ -0,0 +1,333 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# KOI8-R language model
+# Character Mapping Table:
+KOI8R_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,  # 80
+207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,  # 90
+223,224,225, 68,226,227,228,229,230,231,232,233,234,235,236,237,  # a0
+238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,  # b0
+ 27,  3, 21, 28, 13,  2, 39, 19, 26,  4, 23, 11,  8, 12,  5,  1,  # c0
+ 15, 16,  9,  7,  6, 14, 24, 10, 17, 18, 20, 25, 30, 29, 22, 54,  # d0
+ 59, 37, 44, 58, 41, 48, 53, 46, 55, 42, 60, 36, 49, 38, 31, 34,  # e0
+ 35, 43, 45, 32, 40, 52, 56, 33, 61, 62, 51, 57, 47, 63, 50, 70,  # f0
+)
+
+win1251_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
+207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
+223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
+239,240,241,242,243,244,245,246, 68,247,248,249,250,251,252,253,
+ 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
+ 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
+  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
+  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
+)
+
+latin5_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
+207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
+223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
+ 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
+ 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
+  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
+  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
+239, 68,240,241,242,243,244,245,246,247,248,249,250,251,252,255,
+)
+
+macCyrillic_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+ 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
+ 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
+191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
+207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
+223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
+239,240,241,242,243,244,245,246,247,248,249,250,251,252, 68, 16,
+  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
+  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27,255,
+)
+
+IBM855_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+191,192,193,194, 68,195,196,197,198,199,200,201,202,203,204,205,
+206,207,208,209,210,211,212,213,214,215,216,217, 27, 59, 54, 70,
+  3, 37, 21, 44, 28, 58, 13, 41,  2, 48, 39, 53, 19, 46,218,219,
+220,221,222,223,224, 26, 55,  4, 42,225,226,227,228, 23, 60,229,
+230,231,232,233,234,235, 11, 36,236,237,238,239,240,241,242,243,
+  8, 49, 12, 38,  5, 31,  1, 34, 15,244,245,246,247, 35, 16,248,
+ 43,  9, 45,  7, 32,  6, 40, 14, 52, 24, 56, 10, 33, 17, 61,249,
+250, 18, 62, 20, 51, 25, 57, 30, 47, 29, 63, 22, 50,251,252,255,
+)
+
+IBM866_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,142,143,144,145,146,147,148,149,150,151,152, 74,153, 75,154,  # 40
+155,156,157,158,159,160,161,162,163,164,165,253,253,253,253,253,  # 50
+253, 71,172, 66,173, 65,174, 76,175, 64,176,177, 77, 72,178, 69,  # 60
+ 67,179, 78, 73,180,181, 79,182,183,184,185,253,253,253,253,253,  # 70
+ 37, 44, 33, 46, 41, 48, 56, 51, 42, 60, 36, 49, 38, 31, 34, 35,
+ 45, 32, 40, 52, 53, 55, 58, 50, 57, 63, 70, 62, 61, 47, 59, 43,
+  3, 21, 10, 19, 13,  2, 24, 20,  4, 23, 11,  8, 12,  5,  1, 15,
+191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,
+207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,
+223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
+  9,  7,  6, 14, 39, 26, 28, 22, 25, 29, 54, 18, 17, 30, 27, 16,
+239, 68,240,241,242,243,244,245,246,247,248,249,250,251,252,255,
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 97.6601%
+# first 1024 sequences: 2.3389%
+# rest  sequences:      0.1237%
+# negative sequences:   0.0009%
+RussianLangModel = (
+0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,1,3,3,3,3,1,3,3,3,2,3,2,3,3,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,2,2,2,2,2,0,0,2,
+3,3,3,2,3,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,3,2,3,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,2,2,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,2,3,3,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,0,0,3,3,3,3,3,3,3,3,3,3,3,2,1,
+0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,0,0,3,3,3,3,3,3,3,3,3,3,3,2,1,
+0,0,0,0,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,2,2,2,3,1,3,3,1,3,3,3,3,2,2,3,0,2,2,2,3,3,2,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,3,3,3,3,3,2,2,3,2,3,3,3,2,1,2,2,0,1,2,2,2,2,2,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,3,0,2,2,3,3,2,1,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,3,3,1,2,3,2,2,3,2,3,3,3,3,2,2,3,0,3,2,2,3,1,1,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,2,2,3,3,3,3,3,2,3,3,3,3,2,2,2,0,3,3,3,2,2,2,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,2,3,2,3,3,3,3,3,3,2,3,2,2,0,1,3,2,1,2,2,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,2,1,1,3,0,1,1,1,1,2,1,1,0,2,2,2,1,2,0,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,3,3,2,2,2,2,1,3,2,3,2,3,2,1,2,2,0,1,1,2,1,2,1,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,2,2,3,2,3,3,3,2,2,2,2,0,2,2,2,2,3,1,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+3,2,3,2,2,3,3,3,3,3,3,3,3,3,1,3,2,0,0,3,3,3,3,2,3,3,3,3,2,3,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,3,3,2,2,3,3,0,2,1,0,3,2,3,2,3,0,0,1,2,0,0,1,0,1,2,1,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,3,0,2,3,3,3,3,2,3,3,3,3,1,2,2,0,0,2,3,2,2,2,3,2,3,2,2,3,0,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,3,0,2,3,2,3,0,1,2,3,3,2,0,2,3,0,0,2,3,2,2,0,1,3,1,3,2,2,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,3,0,2,3,3,3,3,3,3,3,3,2,1,3,2,0,0,2,2,3,3,3,2,3,3,0,2,2,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,2,3,3,2,2,2,3,3,0,0,1,1,1,1,1,2,0,0,1,1,1,1,0,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,2,3,3,3,3,3,3,3,0,3,2,3,3,2,3,2,0,2,1,0,1,1,0,1,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,2,3,3,3,2,2,2,2,3,1,3,2,3,1,1,2,1,0,2,2,2,2,1,3,1,0,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+2,2,3,3,3,3,3,1,2,2,1,3,1,0,3,0,0,3,0,0,0,1,1,0,1,2,1,0,0,0,0,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,2,1,1,3,3,3,2,2,1,2,2,3,1,1,2,0,0,2,2,1,3,0,0,2,1,1,2,1,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,3,3,3,3,1,2,2,2,1,2,1,3,3,1,1,2,1,2,1,2,2,0,2,0,0,1,1,0,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,3,3,2,1,3,2,2,3,2,0,3,2,0,3,0,1,0,1,1,0,0,1,1,1,1,0,1,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,2,3,3,3,2,2,2,3,3,1,2,1,2,1,0,1,0,1,1,0,1,0,0,2,1,1,1,0,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+3,1,1,2,1,2,3,3,2,2,1,2,2,3,0,2,1,0,0,2,2,3,2,1,2,2,2,2,2,3,1,0,
+0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,1,1,0,1,1,2,2,1,1,3,0,0,1,3,1,1,1,0,0,0,1,0,1,1,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,1,3,3,3,2,0,0,0,2,1,0,1,0,2,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,1,0,0,2,3,2,2,2,1,2,2,2,1,2,1,0,0,1,1,1,0,2,0,1,1,1,0,0,1,1,
+1,0,0,0,0,0,1,2,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,3,0,0,0,0,1,0,0,0,0,3,0,1,2,1,0,0,0,0,0,0,0,1,1,0,0,1,1,
+1,0,1,0,1,2,0,0,1,1,2,1,0,1,1,1,1,0,1,1,1,1,0,1,0,0,1,0,0,1,1,0,
+2,2,3,2,2,2,3,1,2,2,2,2,2,2,2,2,1,1,1,1,1,1,1,0,1,0,1,1,1,0,2,1,
+1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,0,1,0,1,1,0,1,1,1,0,1,1,0,
+3,3,3,2,2,2,2,3,2,2,1,1,2,2,2,2,1,1,3,1,2,1,2,0,0,1,1,0,1,0,2,1,
+1,1,1,1,1,2,1,0,1,1,1,1,0,1,0,0,1,1,0,0,1,0,1,0,0,1,0,0,0,1,1,0,
+2,0,0,1,0,3,2,2,2,2,1,2,1,2,1,2,0,0,0,2,1,2,2,1,1,2,2,0,1,1,0,2,
+1,1,1,1,1,0,1,1,1,2,1,1,1,2,1,0,1,2,1,1,1,1,0,1,1,1,0,0,1,0,0,1,
+1,3,2,2,2,1,1,1,2,3,0,0,0,0,2,0,2,2,1,0,0,0,0,0,0,1,0,0,0,0,1,1,
+1,0,1,1,0,1,0,1,1,0,1,1,0,2,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,
+2,3,2,3,2,1,2,2,2,2,1,0,0,0,2,0,0,1,1,0,0,0,0,0,0,0,1,1,0,0,2,1,
+1,1,2,1,0,2,0,0,1,0,1,0,0,1,0,0,1,1,0,1,1,0,0,0,0,0,1,0,0,0,0,0,
+3,0,0,1,0,2,2,2,3,2,2,2,2,2,2,2,0,0,0,2,1,2,1,1,1,2,2,0,0,0,1,2,
+1,1,1,1,1,0,1,2,1,1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0,0,1,
+2,3,2,3,3,2,0,1,1,1,0,0,1,0,2,0,1,1,3,1,0,0,0,0,0,0,0,1,0,0,2,1,
+1,1,1,1,1,1,1,0,1,0,1,1,1,1,0,1,1,1,0,0,1,1,0,1,0,0,0,0,0,0,1,0,
+2,3,3,3,3,1,2,2,2,2,0,1,1,0,2,1,1,1,2,1,0,1,1,0,0,1,0,1,0,0,2,0,
+0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,3,3,2,0,0,1,1,2,2,1,0,0,2,0,1,1,3,0,0,1,0,0,0,0,0,1,0,1,2,1,
+1,1,2,0,1,1,1,0,1,0,1,1,0,1,0,1,1,1,1,0,1,0,0,0,0,0,0,1,0,1,1,0,
+1,3,2,3,2,1,0,0,2,2,2,0,1,0,2,0,1,1,1,0,1,0,0,0,3,0,1,1,0,0,2,1,
+1,1,1,0,1,1,0,0,0,0,1,1,0,1,0,0,2,1,1,0,1,0,0,0,1,0,1,0,0,1,1,0,
+3,1,2,1,1,2,2,2,2,2,2,1,2,2,1,1,0,0,0,2,2,2,0,0,0,1,2,1,0,1,0,1,
+2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,2,1,1,1,0,1,0,1,1,0,1,1,1,0,0,1,
+3,0,0,0,0,2,0,1,1,1,1,1,1,1,0,1,0,0,0,1,1,1,0,1,0,1,1,0,0,1,0,1,
+1,1,0,0,1,0,0,0,1,0,1,1,0,0,1,0,1,0,1,0,0,0,0,1,0,0,0,1,0,0,0,1,
+1,3,3,2,2,0,0,0,2,2,0,0,0,1,2,0,1,1,2,0,0,0,0,0,0,0,0,1,0,0,2,1,
+0,1,1,0,0,1,1,0,0,0,1,1,0,1,1,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
+2,3,2,3,2,0,0,0,0,1,1,0,0,0,2,0,2,0,2,0,0,0,0,0,1,0,0,1,0,0,1,1,
+1,1,2,0,1,2,1,0,1,1,2,1,1,1,1,1,2,1,1,0,1,0,0,1,1,1,1,1,0,1,1,0,
+1,3,2,2,2,1,0,0,2,2,1,0,1,2,2,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,1,1,
+0,0,1,1,0,1,1,0,0,1,1,0,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,1,0,2,3,1,2,2,2,2,2,2,1,1,0,0,0,1,0,1,0,2,1,1,1,0,0,0,0,1,
+1,1,0,1,1,0,1,1,1,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
+2,0,2,0,0,1,0,3,2,1,2,1,2,2,0,1,0,0,0,2,1,0,0,2,1,1,1,1,0,2,0,2,
+2,1,1,1,1,1,1,1,1,1,1,1,1,2,1,0,1,1,1,1,0,0,0,1,1,1,1,0,1,0,0,1,
+1,2,2,2,2,1,0,0,1,0,0,0,0,0,2,0,1,1,1,1,0,0,0,0,1,0,1,2,0,0,2,0,
+1,0,1,1,1,2,1,0,1,0,1,1,0,0,1,0,1,1,1,0,1,0,0,0,1,0,0,1,0,1,1,0,
+2,1,2,2,2,0,3,0,1,1,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+0,0,0,1,1,1,0,0,1,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,
+1,2,2,3,2,2,0,0,1,1,2,0,1,2,1,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,1,
+0,1,1,0,0,1,1,0,0,1,1,0,0,1,1,0,1,1,0,0,1,0,0,0,0,0,0,0,0,1,1,0,
+2,2,1,1,2,1,2,2,2,2,2,1,2,2,0,1,0,0,0,1,2,2,2,1,2,1,1,1,1,1,2,1,
+1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,0,1,1,1,0,0,0,0,1,1,1,0,1,1,0,0,1,
+1,2,2,2,2,0,1,0,2,2,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,
+0,0,1,0,0,1,0,0,0,0,1,0,1,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,2,2,0,0,0,2,2,2,0,1,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,
+0,1,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,2,2,0,0,0,0,1,0,0,1,1,2,0,0,0,0,1,0,1,0,0,1,0,0,2,0,0,0,1,
+0,0,1,0,0,1,0,0,0,1,1,0,0,0,0,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,
+1,2,2,2,1,1,2,0,2,1,1,1,1,0,2,2,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,1,
+0,0,1,0,1,1,0,0,0,0,1,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+1,0,2,1,2,0,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,
+0,0,1,0,1,1,0,0,0,0,1,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
+1,0,0,0,0,2,0,1,2,1,0,1,1,1,0,1,0,0,0,1,0,1,0,0,1,0,1,0,0,0,0,1,
+0,0,0,0,0,1,0,0,1,1,0,0,1,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,
+2,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+1,0,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+1,1,1,0,1,0,1,0,0,1,1,1,1,0,0,0,1,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+1,1,0,1,1,0,1,0,1,0,0,0,0,1,1,0,1,1,0,0,0,0,0,1,0,1,1,0,1,0,0,0,
+0,1,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,1,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
+)
+
+Koi8rModel = {
+  'char_to_order_map': KOI8R_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "KOI8-R",
+  'language': 'Russian',
+}
+
+Win1251CyrillicModel = {
+  'char_to_order_map': win1251_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "windows-1251",
+  'language': 'Russian',
+}
+
+Latin5CyrillicModel = {
+  'char_to_order_map': latin5_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "ISO-8859-5",
+  'language': 'Russian',
+}
+
+MacCyrillicModel = {
+  'char_to_order_map': macCyrillic_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "MacCyrillic",
+  'language': 'Russian',
+}
+
+Ibm866Model = {
+  'char_to_order_map': IBM866_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "IBM866",
+  'language': 'Russian',
+}
+
+Ibm855Model = {
+  'char_to_order_map': IBM855_char_to_order_map,
+  'precedence_matrix': RussianLangModel,
+  'typical_positive_ratio': 0.976601,
+  'keep_english_letter': False,
+  'charset_name': "IBM855",
+  'language': 'Russian',
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langgreekmodel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langgreekmodel.py
new file mode 100644
index 0000000..5332221
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langgreekmodel.py
@@ -0,0 +1,225 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# Character Mapping Table:
+Latin7_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 82,100,104, 94, 98,101,116,102,111,187,117, 92, 88,113, 85,  # 40
+ 79,118,105, 83, 67,114,119, 95, 99,109,188,253,253,253,253,253,  # 50
+253, 72, 70, 80, 81, 60, 96, 93, 89, 68,120, 97, 77, 86, 69, 55,  # 60
+ 78,115, 65, 66, 58, 76,106,103, 87,107,112,253,253,253,253,253,  # 70
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 80
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 90
+253,233, 90,253,253,253,253,253,253,253,253,253,253, 74,253,253,  # a0
+253,253,253,253,247,248, 61, 36, 46, 71, 73,253, 54,253,108,123,  # b0
+110, 31, 51, 43, 41, 34, 91, 40, 52, 47, 44, 53, 38, 49, 59, 39,  # c0
+ 35, 48,250, 37, 33, 45, 56, 50, 84, 57,120,121, 17, 18, 22, 15,  # d0
+124,  1, 29, 20, 21,  3, 32, 13, 25,  5, 11, 16, 10,  6, 30,  4,  # e0
+  9,  8, 14,  7,  2, 12, 28, 23, 42, 24, 64, 75, 19, 26, 27,253,  # f0
+)
+
+win1253_char_to_order_map = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 82,100,104, 94, 98,101,116,102,111,187,117, 92, 88,113, 85,  # 40
+ 79,118,105, 83, 67,114,119, 95, 99,109,188,253,253,253,253,253,  # 50
+253, 72, 70, 80, 81, 60, 96, 93, 89, 68,120, 97, 77, 86, 69, 55,  # 60
+ 78,115, 65, 66, 58, 76,106,103, 87,107,112,253,253,253,253,253,  # 70
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 80
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 90
+253,233, 61,253,253,253,253,253,253,253,253,253,253, 74,253,253,  # a0
+253,253,253,253,247,253,253, 36, 46, 71, 73,253, 54,253,108,123,  # b0
+110, 31, 51, 43, 41, 34, 91, 40, 52, 47, 44, 53, 38, 49, 59, 39,  # c0
+ 35, 48,250, 37, 33, 45, 56, 50, 84, 57,120,121, 17, 18, 22, 15,  # d0
+124,  1, 29, 20, 21,  3, 32, 13, 25,  5, 11, 16, 10,  6, 30,  4,  # e0
+  9,  8, 14,  7,  2, 12, 28, 23, 42, 24, 64, 75, 19, 26, 27,253,  # f0
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 98.2851%
+# first 1024 sequences:1.7001%
+# rest  sequences:     0.0359%
+# negative sequences:  0.0148%
+GreekLangModel = (
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,2,2,3,3,3,3,3,3,3,3,1,3,3,3,0,2,2,3,3,0,3,0,3,2,0,3,3,3,0,
+3,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,0,3,3,0,3,2,3,3,0,3,2,3,3,3,0,0,3,0,3,0,3,3,2,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
+0,2,3,2,2,3,3,3,3,3,3,3,3,0,3,3,3,3,0,2,3,3,0,3,3,3,3,2,3,3,3,0,
+2,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,0,2,1,3,3,3,3,2,3,3,2,3,3,2,0,
+0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,0,3,3,3,3,3,3,0,3,3,0,3,3,3,3,3,3,3,3,3,3,0,3,2,3,3,0,
+2,0,1,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,2,3,0,0,0,0,3,3,0,3,1,3,3,3,0,3,3,0,3,3,3,3,0,0,0,0,
+2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,0,3,0,3,3,3,3,3,0,3,2,2,2,3,0,2,3,3,3,3,3,2,3,3,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,3,2,2,2,3,3,3,3,0,3,1,3,3,3,3,2,3,3,3,3,3,3,3,2,2,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,2,0,3,0,0,0,3,3,2,3,3,3,3,3,0,0,3,2,3,0,2,3,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,3,3,3,3,0,0,3,3,0,2,3,0,3,0,3,3,3,0,0,3,0,3,0,2,2,3,3,0,0,
+0,0,1,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,2,0,3,2,3,3,3,3,0,3,3,3,3,3,0,3,3,2,3,2,3,3,2,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,2,3,2,3,3,3,3,3,3,0,2,3,2,3,2,2,2,3,2,3,3,2,3,0,2,2,2,3,0,
+2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,0,0,0,3,3,3,2,3,3,0,0,3,0,3,0,0,0,3,2,0,3,0,3,0,0,2,0,2,0,
+0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,0,3,3,3,3,3,3,0,3,3,0,3,0,0,0,3,3,0,3,3,3,0,0,1,2,3,0,
+3,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,2,0,0,3,2,2,3,3,0,3,3,3,3,3,2,1,3,0,3,2,3,3,2,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,3,0,2,3,3,3,3,3,3,0,0,3,0,3,0,0,0,3,3,0,3,2,3,0,0,3,3,3,0,
+3,0,0,0,2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,0,3,3,3,3,3,3,0,0,3,0,3,0,0,0,3,2,0,3,2,3,0,0,3,2,3,0,
+2,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,1,2,2,3,3,3,3,3,3,0,2,3,0,3,0,0,0,3,3,0,3,0,2,0,0,2,3,1,0,
+2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,3,3,3,3,0,3,0,3,3,2,3,0,3,3,3,3,3,3,0,3,3,3,0,2,3,0,0,3,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,3,3,3,0,0,3,0,0,0,3,3,0,3,0,2,3,3,0,0,3,0,3,0,3,3,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,0,0,0,3,3,3,3,3,3,0,0,3,0,2,0,0,0,3,3,0,3,0,3,0,0,2,0,2,0,
+0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,3,0,3,0,2,0,3,2,0,3,2,3,2,3,0,0,3,2,3,2,3,3,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,0,0,2,3,3,3,3,3,0,0,0,3,0,2,1,0,0,3,2,2,2,0,3,0,0,2,2,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,3,3,3,2,0,3,0,3,0,3,3,0,2,1,2,3,3,0,0,3,0,3,0,3,3,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,3,3,3,0,3,3,3,3,3,3,0,2,3,0,3,0,0,0,2,1,0,2,2,3,0,0,2,2,2,0,
+0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,3,0,0,2,3,3,3,2,3,0,0,1,3,0,2,0,0,0,0,3,0,1,0,2,0,0,1,1,1,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,3,1,0,3,0,0,0,3,2,0,3,2,3,3,3,0,0,3,0,3,2,2,2,1,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,3,3,3,0,0,3,0,0,0,0,2,0,2,3,3,2,2,2,2,3,0,2,0,2,2,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,3,3,3,2,0,0,0,0,0,0,2,3,0,2,0,2,3,2,0,0,3,0,3,0,3,1,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,3,2,3,3,2,2,3,0,2,0,3,0,0,0,2,0,0,0,0,1,2,0,2,0,2,0,
+0,2,0,2,0,2,2,0,0,1,0,2,2,2,0,2,2,2,0,2,2,2,0,0,2,0,0,1,0,0,0,0,
+0,2,0,3,3,2,0,0,0,0,0,0,1,3,0,2,0,2,2,2,0,0,2,0,3,0,0,2,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,0,2,3,2,0,2,2,0,2,0,2,2,0,2,0,2,2,2,0,0,0,0,0,0,2,3,0,0,0,2,
+0,1,2,0,0,0,0,2,2,0,0,0,2,1,0,2,2,0,0,0,0,0,0,1,0,2,0,0,0,0,0,0,
+0,0,2,1,0,2,3,2,2,3,2,3,2,0,0,3,3,3,0,0,3,2,0,0,0,1,1,0,2,0,2,2,
+0,2,0,2,0,2,2,0,0,2,0,2,2,2,0,2,2,2,2,0,0,2,0,0,0,2,0,1,0,0,0,0,
+0,3,0,3,3,2,2,0,3,0,0,0,2,2,0,2,2,2,1,2,0,0,1,2,2,0,0,3,0,0,0,2,
+0,1,2,0,0,0,1,2,0,0,0,0,0,0,0,2,2,0,1,0,0,2,0,0,0,2,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,3,3,2,2,0,0,0,2,0,2,3,3,0,2,0,0,0,0,0,0,2,2,2,0,2,2,0,2,0,2,
+0,2,2,0,0,2,2,2,2,1,0,0,2,2,0,2,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,
+0,2,0,3,2,3,0,0,0,3,0,0,2,2,0,2,0,2,2,2,0,0,2,0,0,0,0,0,0,0,0,2,
+0,0,2,2,0,0,2,2,2,0,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,2,0,0,3,2,0,2,2,2,2,2,0,0,0,2,0,0,0,0,2,0,1,0,0,2,0,1,0,0,0,
+0,2,2,2,0,2,2,0,1,2,0,2,2,2,0,2,2,2,2,1,2,2,0,0,2,0,0,0,0,0,0,0,
+0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+0,2,0,2,0,2,2,0,0,0,0,1,2,1,0,0,2,2,0,0,2,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,3,2,3,0,0,2,0,0,0,2,2,0,2,0,0,0,1,0,0,2,0,2,0,2,2,0,0,0,0,
+0,0,2,0,0,0,0,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,
+0,2,2,3,2,2,0,0,0,0,0,0,1,3,0,2,0,2,2,0,0,0,1,0,2,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,0,2,0,3,2,0,2,0,0,0,0,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+0,0,2,0,0,0,0,1,1,0,0,2,1,2,0,2,2,0,1,0,0,1,0,0,0,2,0,0,0,0,0,0,
+0,3,0,2,2,2,0,0,2,0,0,0,2,0,0,0,2,3,0,2,0,0,0,0,0,0,2,2,0,0,0,2,
+0,1,2,0,0,0,1,2,2,1,0,0,0,2,0,0,2,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,1,2,0,2,2,0,2,0,0,2,0,0,0,0,1,2,1,0,2,1,0,0,0,0,0,0,0,0,0,0,
+0,0,2,0,0,0,3,1,2,2,0,2,0,0,0,0,2,0,0,0,2,0,0,3,0,0,0,0,2,2,2,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,1,0,2,0,1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,2,
+0,2,2,0,0,2,2,2,2,2,0,1,2,0,0,0,2,2,0,1,0,2,0,0,2,2,0,0,0,0,0,0,
+0,0,0,0,1,0,0,0,0,0,0,0,3,0,0,2,0,0,0,0,0,0,0,0,2,0,2,0,0,0,0,2,
+0,1,2,0,0,0,0,2,2,1,0,1,0,1,0,2,2,2,1,0,0,0,0,0,0,1,0,0,0,0,0,0,
+0,2,0,1,2,0,0,0,0,0,0,0,0,0,0,2,0,0,2,2,0,0,0,0,1,0,0,0,0,0,0,2,
+0,2,2,0,0,0,0,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0,0,
+0,2,2,2,2,0,0,0,3,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,1,
+0,0,2,0,0,0,0,1,2,0,0,0,0,0,0,2,2,1,1,0,0,0,0,0,0,1,0,0,0,0,0,0,
+0,2,0,2,2,2,0,0,2,0,0,0,0,0,0,0,2,2,2,0,0,0,2,0,0,0,0,0,0,0,0,2,
+0,0,1,0,0,0,0,2,1,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
+0,3,0,2,0,0,0,0,0,0,0,0,2,0,0,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,2,
+0,0,2,0,0,0,0,2,2,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,2,0,2,2,1,0,0,0,0,0,0,2,0,0,2,0,2,2,2,0,0,0,0,0,0,2,0,0,0,0,2,
+0,0,2,0,0,2,0,2,2,0,0,0,0,2,0,2,0,0,0,0,0,2,0,0,0,2,0,0,0,0,0,0,
+0,0,3,0,0,0,2,2,0,2,2,0,0,0,0,0,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,2,0,0,0,0,0,
+0,2,2,2,2,2,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,
+0,0,0,0,0,0,0,2,1,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,2,2,0,0,0,0,0,2,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+0,2,0,0,0,2,0,0,0,0,0,1,0,0,0,0,2,2,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,2,0,0,0,
+0,2,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,2,0,2,0,0,0,
+0,0,0,0,0,0,0,0,2,1,0,0,0,0,0,0,2,0,0,0,1,2,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+)
+
+Latin7GreekModel = {
+  'char_to_order_map': Latin7_char_to_order_map,
+  'precedence_matrix': GreekLangModel,
+  'typical_positive_ratio': 0.982851,
+  'keep_english_letter': False,
+  'charset_name': "ISO-8859-7",
+  'language': 'Greek',
+}
+
+Win1253GreekModel = {
+  'char_to_order_map': win1253_char_to_order_map,
+  'precedence_matrix': GreekLangModel,
+  'typical_positive_ratio': 0.982851,
+  'keep_english_letter': False,
+  'charset_name': "windows-1253",
+  'language': 'Greek',
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langhebrewmodel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langhebrewmodel.py
new file mode 100644
index 0000000..58f4c87
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langhebrewmodel.py
@@ -0,0 +1,200 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+#          Simon Montagu
+# Portions created by the Initial Developer are Copyright (C) 2005
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#   Shoshannah Forbes - original C code (?)
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# Windows-1255 language model
+# Character Mapping Table:
+WIN1255_CHAR_TO_ORDER_MAP = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 69, 91, 79, 80, 92, 89, 97, 90, 68,111,112, 82, 73, 95, 85,  # 40
+ 78,121, 86, 71, 67,102,107, 84,114,103,115,253,253,253,253,253,  # 50
+253, 50, 74, 60, 61, 42, 76, 70, 64, 53,105, 93, 56, 65, 54, 49,  # 60
+ 66,110, 51, 43, 44, 63, 81, 77, 98, 75,108,253,253,253,253,253,  # 70
+124,202,203,204,205, 40, 58,206,207,208,209,210,211,212,213,214,
+215, 83, 52, 47, 46, 72, 32, 94,216,113,217,109,218,219,220,221,
+ 34,116,222,118,100,223,224,117,119,104,125,225,226, 87, 99,227,
+106,122,123,228, 55,229,230,101,231,232,120,233, 48, 39, 57,234,
+ 30, 59, 41, 88, 33, 37, 36, 31, 29, 35,235, 62, 28,236,126,237,
+238, 38, 45,239,240,241,242,243,127,244,245,246,247,248,249,250,
+  9,  8, 20, 16,  3,  2, 24, 14, 22,  1, 25, 15,  4, 11,  6, 23,
+ 12, 19, 13, 26, 18, 27, 21, 17,  7, 10,  5,251,252,128, 96,253,
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 98.4004%
+# first 1024 sequences: 1.5981%
+# rest  sequences:      0.087%
+# negative sequences:   0.0015%
+HEBREW_LANG_MODEL = (
+0,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,2,3,2,1,2,0,1,0,0,
+3,0,3,1,0,0,1,3,2,0,1,1,2,0,2,2,2,1,1,1,1,2,1,1,1,2,0,0,2,2,0,1,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,
+1,2,1,2,1,2,0,0,2,0,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,
+1,2,1,3,1,1,0,0,2,0,0,0,1,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,0,1,2,2,1,3,
+1,2,1,1,2,2,0,0,2,2,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,1,0,1,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,2,2,2,2,3,2,
+1,2,1,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,2,3,2,2,3,2,2,2,1,2,2,2,2,
+1,2,1,1,2,2,0,1,2,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,0,2,2,2,2,2,
+0,2,0,2,2,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,0,2,2,2,
+0,2,1,2,2,2,0,0,2,1,0,0,0,0,1,0,1,0,0,0,0,0,0,2,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,2,1,2,3,2,2,2,
+1,2,1,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,1,0,
+3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,3,3,1,0,2,0,2,
+0,2,1,2,2,2,0,0,1,2,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,2,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,2,3,2,2,3,2,1,2,1,1,1,
+0,1,1,1,1,1,3,0,1,0,0,0,0,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+3,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,1,1,0,0,1,0,0,1,0,0,0,0,
+0,0,1,0,0,0,0,0,2,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,2,2,2,
+0,2,0,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,2,3,3,3,2,1,2,3,3,2,3,3,3,3,2,3,2,1,2,0,2,1,2,
+0,2,0,2,2,2,0,0,1,2,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,1,0,
+3,3,3,3,3,3,3,3,3,2,3,3,3,1,2,2,3,3,2,3,2,3,2,2,3,1,2,2,0,2,2,2,
+0,2,1,2,2,2,0,0,1,2,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,1,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,2,3,3,2,2,2,3,3,3,3,1,3,2,2,2,
+0,2,0,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,2,3,3,3,2,3,2,2,2,1,2,2,0,2,2,2,2,
+0,2,0,2,2,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,3,3,2,3,3,3,1,3,2,3,3,2,3,3,2,2,1,2,2,2,2,2,2,
+0,2,1,2,1,2,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,2,3,2,3,3,2,3,3,3,3,2,3,2,3,3,3,3,3,2,2,2,2,2,2,2,1,
+0,2,0,1,2,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,3,3,3,2,1,2,3,3,3,3,3,3,3,2,3,2,3,2,1,2,3,0,2,1,2,2,
+0,2,1,1,2,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,2,0,
+3,3,3,3,3,3,3,3,3,2,3,3,3,3,2,1,3,1,2,2,2,1,2,3,3,1,2,1,2,2,2,2,
+0,1,1,1,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,0,2,3,3,3,1,3,3,3,1,2,2,2,2,1,1,2,2,2,2,2,2,
+0,2,0,1,1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
+3,3,3,3,3,3,2,3,3,3,2,2,3,3,3,2,1,2,3,2,3,2,2,2,2,1,2,1,1,1,2,2,
+0,2,1,1,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+3,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,1,0,0,0,0,0,
+1,0,1,0,0,0,0,0,2,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,2,3,3,2,3,1,2,2,2,2,3,2,3,1,1,2,2,1,2,2,1,1,0,2,2,2,2,
+0,1,0,1,2,2,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,
+3,0,0,1,1,0,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,2,0,
+0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,1,0,1,0,1,1,0,1,1,0,0,0,1,1,0,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,0,0,1,1,0,1,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+3,2,2,1,2,2,2,2,2,2,2,1,2,2,1,2,2,1,1,1,1,1,1,1,1,2,1,1,0,3,3,3,
+0,3,0,2,2,2,2,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+2,2,2,3,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,1,2,2,1,2,2,2,1,1,1,2,0,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2,2,2,2,0,2,2,0,0,0,0,0,0,
+0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,1,2,1,0,2,1,0,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+0,3,1,1,2,2,2,2,2,1,2,2,2,1,1,2,2,2,2,2,2,2,1,2,2,1,0,1,1,1,1,0,
+0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,2,1,1,1,1,2,1,1,2,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,0,0,0,0,
+0,0,2,0,0,0,0,0,0,0,0,1,1,0,0,0,0,1,1,0,0,1,1,0,0,0,0,0,0,1,0,0,
+2,1,1,2,2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,1,2,1,2,1,1,1,1,0,0,0,0,
+0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,2,1,2,2,2,2,2,2,2,2,2,2,1,2,1,2,1,1,2,1,1,1,2,1,2,1,2,0,1,0,1,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,3,1,2,2,2,1,2,2,2,2,2,2,2,2,1,2,1,1,1,1,1,1,2,1,2,1,1,0,1,0,1,
+0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,1,2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,
+0,2,0,1,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
+3,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,1,1,1,1,1,1,1,0,1,1,0,1,0,0,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,2,0,1,1,1,0,1,0,0,0,1,1,0,1,1,0,0,0,0,0,1,1,0,0,
+0,1,1,1,2,1,2,2,2,0,2,0,2,0,1,1,2,1,1,1,1,2,1,0,1,1,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,1,0,0,0,0,0,1,0,1,2,2,0,1,0,0,1,1,2,2,1,2,0,2,0,0,0,1,2,0,1,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,2,0,2,1,2,0,2,0,0,1,1,1,1,1,1,0,1,0,0,0,1,0,0,1,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,1,0,0,0,0,0,1,0,2,1,1,0,1,0,0,1,1,1,2,2,0,0,1,0,0,0,1,0,0,1,
+1,1,2,1,0,1,1,1,0,1,0,1,1,1,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,2,2,1,
+0,2,0,1,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,1,0,0,1,0,1,1,1,1,0,0,0,0,0,1,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,1,1,1,1,1,1,1,1,2,1,0,1,1,1,1,1,1,1,1,1,1,1,0,1,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,1,1,1,0,1,1,0,1,0,0,0,1,1,0,1,
+2,0,1,0,1,0,1,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,1,1,1,0,1,0,0,1,1,2,1,1,2,0,1,0,0,0,1,1,0,1,
+1,0,0,1,0,0,1,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,0,0,2,1,1,2,0,2,0,0,0,1,1,0,1,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,2,1,1,0,1,0,0,2,2,1,2,1,1,0,1,0,0,0,1,1,0,1,
+2,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,2,2,0,0,0,0,0,1,1,0,1,0,0,1,0,0,0,0,1,0,1,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,2,2,0,0,0,0,2,1,1,1,0,2,1,1,0,0,0,2,1,0,1,
+1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,1,1,0,2,1,1,0,1,0,0,0,1,1,0,1,
+2,2,1,1,1,0,1,1,0,1,1,0,1,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,2,1,1,0,1,0,0,1,1,0,1,2,1,0,2,0,0,0,1,1,0,1,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,
+0,1,0,0,2,0,2,1,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,1,0,0,0,0,0,1,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,1,0,1,1,2,0,1,0,0,1,1,1,0,1,0,0,1,0,0,0,1,0,0,1,
+1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,0,0,0,0,0,1,0,1,1,0,0,1,0,0,2,1,1,1,1,1,0,1,0,0,0,0,1,0,1,
+0,1,1,1,2,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,1,2,1,0,0,0,0,0,1,1,1,1,1,0,1,0,0,0,1,1,0,0,
+)
+
+Win1255HebrewModel = {
+  'char_to_order_map': WIN1255_CHAR_TO_ORDER_MAP,
+  'precedence_matrix': HEBREW_LANG_MODEL,
+  'typical_positive_ratio': 0.984004,
+  'keep_english_letter': False,
+  'charset_name': "windows-1255",
+  'language': 'Hebrew',
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langhungarianmodel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langhungarianmodel.py
new file mode 100644
index 0000000..bb7c095
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langhungarianmodel.py
@@ -0,0 +1,225 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# Character Mapping Table:
+Latin2_HungarianCharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 28, 40, 54, 45, 32, 50, 49, 38, 39, 53, 36, 41, 34, 35, 47,
+ 46, 71, 43, 33, 37, 57, 48, 64, 68, 55, 52,253,253,253,253,253,
+253,  2, 18, 26, 17,  1, 27, 12, 20,  9, 22,  7,  6, 13,  4,  8,
+ 23, 67, 10,  5,  3, 21, 19, 65, 62, 16, 11,253,253,253,253,253,
+159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,
+175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,
+191,192,193,194,195,196,197, 75,198,199,200,201,202,203,204,205,
+ 79,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,
+221, 51, 81,222, 78,223,224,225,226, 44,227,228,229, 61,230,231,
+232,233,234, 58,235, 66, 59,236,237,238, 60, 69, 63,239,240,241,
+ 82, 14, 74,242, 70, 80,243, 72,244, 15, 83, 77, 84, 30, 76, 85,
+245,246,247, 25, 73, 42, 24,248,249,250, 31, 56, 29,251,252,253,
+)
+
+win1250HungarianCharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253, 28, 40, 54, 45, 32, 50, 49, 38, 39, 53, 36, 41, 34, 35, 47,
+ 46, 72, 43, 33, 37, 57, 48, 64, 68, 55, 52,253,253,253,253,253,
+253,  2, 18, 26, 17,  1, 27, 12, 20,  9, 22,  7,  6, 13,  4,  8,
+ 23, 67, 10,  5,  3, 21, 19, 65, 62, 16, 11,253,253,253,253,253,
+161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,
+177,178,179,180, 78,181, 69,182,183,184,185,186,187,188,189,190,
+191,192,193,194,195,196,197, 76,198,199,200,201,202,203,204,205,
+ 81,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,
+221, 51, 83,222, 80,223,224,225,226, 44,227,228,229, 61,230,231,
+232,233,234, 58,235, 66, 59,236,237,238, 60, 70, 63,239,240,241,
+ 84, 14, 75,242, 71, 82,243, 73,244, 15, 85, 79, 86, 30, 77, 87,
+245,246,247, 25, 74, 42, 24,248,249,250, 31, 56, 29,251,252,253,
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 94.7368%
+# first 1024 sequences:5.2623%
+# rest  sequences:     0.8894%
+# negative sequences:  0.0009%
+HungarianLangModel = (
+0,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,1,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
+3,3,3,3,3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,2,2,3,3,1,1,2,2,2,2,2,1,2,
+3,2,2,3,3,3,3,3,2,3,3,3,3,3,3,1,2,3,3,3,3,2,3,3,1,1,3,3,0,1,1,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,
+3,2,1,3,3,3,3,3,2,3,3,3,3,3,1,1,2,3,3,3,3,3,3,3,1,1,3,2,0,1,1,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,
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+2,1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,0,0,1,0,0,1,0,1,0,1,1,1,0,0,1,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,0,1,1,1,1,0,0,0,1,1,1,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,
+0,1,1,1,1,1,1,0,1,1,0,1,0,1,0,0,1,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
+)
+
+Latin2HungarianModel = {
+  'char_to_order_map': Latin2_HungarianCharToOrderMap,
+  'precedence_matrix': HungarianLangModel,
+  'typical_positive_ratio': 0.947368,
+  'keep_english_letter': True,
+  'charset_name': "ISO-8859-2",
+  'language': 'Hungarian',
+}
+
+Win1250HungarianModel = {
+  'char_to_order_map': win1250HungarianCharToOrderMap,
+  'precedence_matrix': HungarianLangModel,
+  'typical_positive_ratio': 0.947368,
+  'keep_english_letter': True,
+  'charset_name': "windows-1250",
+  'language': 'Hungarian',
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langthaimodel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langthaimodel.py
new file mode 100644
index 0000000..15f94c2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langthaimodel.py
@@ -0,0 +1,199 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# The following result for thai was collected from a limited sample (1M).
+
+# Character Mapping Table:
+TIS620CharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,254,255,255,254,255,255,  # 00
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,  # 10
+253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,253,  # 20
+252,252,252,252,252,252,252,252,252,252,253,253,253,253,253,253,  # 30
+253,182,106,107,100,183,184,185,101, 94,186,187,108,109,110,111,  # 40
+188,189,190, 89, 95,112,113,191,192,193,194,253,253,253,253,253,  # 50
+253, 64, 72, 73,114, 74,115,116,102, 81,201,117, 90,103, 78, 82,  # 60
+ 96,202, 91, 79, 84,104,105, 97, 98, 92,203,253,253,253,253,253,  # 70
+209,210,211,212,213, 88,214,215,216,217,218,219,220,118,221,222,
+223,224, 99, 85, 83,225,226,227,228,229,230,231,232,233,234,235,
+236,  5, 30,237, 24,238, 75,  8, 26, 52, 34, 51,119, 47, 58, 57,
+ 49, 53, 55, 43, 20, 19, 44, 14, 48,  3, 17, 25, 39, 62, 31, 54,
+ 45,  9, 16,  2, 61, 15,239, 12, 42, 46, 18, 21, 76,  4, 66, 63,
+ 22, 10,  1, 36, 23, 13, 40, 27, 32, 35, 86,240,241,242,243,244,
+ 11, 28, 41, 29, 33,245, 50, 37,  6,  7, 67, 77, 38, 93,246,247,
+ 68, 56, 59, 65, 69, 60, 70, 80, 71, 87,248,249,250,251,252,253,
+)
+
+# Model Table:
+# total sequences: 100%
+# first 512 sequences: 92.6386%
+# first 1024 sequences:7.3177%
+# rest  sequences:     1.0230%
+# negative sequences:  0.0436%
+ThaiLangModel = (
+0,1,3,3,3,3,0,0,3,3,0,3,3,0,3,3,3,3,3,3,3,3,0,0,3,3,3,0,3,3,3,3,
+0,3,3,0,0,0,1,3,0,3,3,2,3,3,0,1,2,3,3,3,3,0,2,0,2,0,0,3,2,1,2,2,
+3,0,3,3,2,3,0,0,3,3,0,3,3,0,3,3,3,3,3,3,3,3,3,0,3,2,3,0,2,2,2,3,
+0,2,3,0,0,0,0,1,0,1,2,3,1,1,3,2,2,0,1,1,0,0,1,0,0,0,0,0,0,0,1,1,
+3,3,3,2,3,3,3,3,3,3,3,3,3,3,3,2,2,2,2,2,2,2,3,3,2,3,2,3,3,2,2,2,
+3,1,2,3,0,3,3,2,2,1,2,3,3,1,2,0,1,3,0,1,0,0,1,0,0,0,0,0,0,0,1,1,
+3,3,2,2,3,3,3,3,1,2,3,3,3,3,3,2,2,2,2,3,3,2,2,3,3,2,2,3,2,3,2,2,
+3,3,1,2,3,1,2,2,3,3,1,0,2,1,0,0,3,1,2,1,0,0,1,0,0,0,0,0,0,1,0,1,
+3,3,3,3,3,3,2,2,3,3,3,3,2,3,2,2,3,3,2,2,3,2,2,2,2,1,1,3,1,2,1,1,
+3,2,1,0,2,1,0,1,0,1,1,0,1,1,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,
+3,3,3,2,3,2,3,3,2,2,3,2,3,3,2,3,1,1,2,3,2,2,2,3,2,2,2,2,2,1,2,1,
+2,2,1,1,3,3,2,1,0,1,2,2,0,1,3,0,0,0,1,1,0,0,0,0,0,2,3,0,0,2,1,1,
+3,3,2,3,3,2,0,0,3,3,0,3,3,0,2,2,3,1,2,2,1,1,1,0,2,2,2,0,2,2,1,1,
+0,2,1,0,2,0,0,2,0,1,0,0,1,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,0,
+3,3,2,3,3,2,0,0,3,3,0,2,3,0,2,1,2,2,2,2,1,2,0,0,2,2,2,0,2,2,1,1,
+0,2,1,0,2,0,0,2,0,1,1,0,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,
+3,3,2,3,2,3,2,0,2,2,1,3,2,1,3,2,1,2,3,2,2,3,0,2,3,2,2,1,2,2,2,2,
+1,2,2,0,0,0,0,2,0,1,2,0,1,1,1,0,1,0,3,1,1,0,0,0,0,0,0,0,0,0,1,0,
+3,3,2,3,3,2,3,2,2,2,3,2,2,3,2,2,1,2,3,2,2,3,1,3,2,2,2,3,2,2,2,3,
+3,2,1,3,0,1,1,1,0,2,1,1,1,1,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,2,0,0,
+1,0,0,3,0,3,3,3,3,3,0,0,3,0,2,2,3,3,3,3,3,0,0,0,1,1,3,0,0,0,0,2,
+0,0,1,0,0,0,0,0,0,0,2,3,0,0,0,3,0,2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
+2,0,3,3,3,3,0,0,2,3,0,0,3,0,3,3,2,3,3,3,3,3,0,0,3,3,3,0,0,0,3,3,
+0,0,3,0,0,0,0,2,0,0,2,1,1,3,0,0,1,0,0,2,3,0,1,0,0,0,0,0,0,0,1,0,
+3,3,3,3,2,3,3,3,3,3,3,3,1,2,1,3,3,2,2,1,2,2,2,3,1,1,2,0,2,1,2,1,
+2,2,1,0,0,0,1,1,0,1,0,1,1,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,
+3,0,2,1,2,3,3,3,0,2,0,2,2,0,2,1,3,2,2,1,2,1,0,0,2,2,1,0,2,1,2,2,
+0,1,1,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,2,1,3,3,1,1,3,0,2,3,1,1,3,2,1,1,2,0,2,2,3,2,1,1,1,1,1,2,
+3,0,0,1,3,1,2,1,2,0,3,0,0,0,1,0,3,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,
+3,3,1,1,3,2,3,3,3,1,3,2,1,3,2,1,3,2,2,2,2,1,3,3,1,2,1,3,1,2,3,0,
+2,1,1,3,2,2,2,1,2,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,
+3,3,2,3,2,3,3,2,3,2,3,2,3,3,2,1,0,3,2,2,2,1,2,2,2,1,2,2,1,2,1,1,
+2,2,2,3,0,1,3,1,1,1,1,0,1,1,0,2,1,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,2,3,2,2,1,1,3,2,3,2,3,2,0,3,2,2,1,2,0,2,2,2,1,2,2,2,2,1,
+3,2,1,2,2,1,0,2,0,1,0,0,1,1,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,1,
+3,3,3,3,3,2,3,1,2,3,3,2,2,3,0,1,1,2,0,3,3,2,2,3,0,1,1,3,0,0,0,0,
+3,1,0,3,3,0,2,0,2,1,0,0,3,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,2,3,2,3,3,0,1,3,1,1,2,1,2,1,1,3,1,1,0,2,3,1,1,1,1,1,1,1,1,
+3,1,1,2,2,2,2,1,1,1,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,2,2,1,1,2,1,3,3,2,3,2,2,3,2,2,3,1,2,2,1,2,0,3,2,1,2,2,2,2,2,1,
+3,2,1,2,2,2,1,1,1,1,0,0,1,1,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,1,3,3,0,2,1,0,3,2,0,0,3,1,0,1,1,0,1,0,0,0,0,0,1,
+1,0,0,1,0,3,2,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,2,2,2,3,0,0,1,3,0,3,2,0,3,2,2,3,3,3,3,3,1,0,2,2,2,0,2,2,1,2,
+0,2,3,0,0,0,0,1,0,1,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+3,0,2,3,1,3,3,2,3,3,0,3,3,0,3,2,2,3,2,3,3,3,0,0,2,2,3,0,1,1,1,3,
+0,0,3,0,0,0,2,2,0,1,3,0,1,2,2,2,3,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,
+3,2,3,3,2,0,3,3,2,2,3,1,3,2,1,3,2,0,1,2,2,0,2,3,2,1,0,3,0,0,0,0,
+3,0,0,2,3,1,3,0,0,3,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,1,3,2,2,2,1,2,0,1,3,1,1,3,1,3,0,0,2,1,1,1,1,2,1,1,1,0,2,1,0,1,
+1,2,0,0,0,3,1,1,0,0,0,0,1,0,1,0,0,1,0,1,0,0,0,0,0,3,1,0,0,0,1,0,
+3,3,3,3,2,2,2,2,2,1,3,1,1,1,2,0,1,1,2,1,2,1,3,2,0,0,3,1,1,1,1,1,
+3,1,0,2,3,0,0,0,3,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,2,3,0,3,3,0,2,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,2,3,1,3,0,0,1,2,0,0,2,0,3,3,2,3,3,3,2,3,0,0,2,2,2,0,0,0,2,2,
+0,0,1,0,0,0,0,3,0,0,0,0,2,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+0,0,0,3,0,2,0,0,0,0,0,0,0,0,0,0,1,2,3,1,3,3,0,0,1,0,3,0,0,0,0,0,
+0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,1,2,3,1,2,3,1,0,3,0,2,2,1,0,2,1,1,2,0,1,0,0,1,1,1,1,0,1,0,0,
+1,0,0,0,0,1,1,0,3,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,2,1,0,1,1,1,3,1,2,2,2,2,2,2,1,1,1,1,0,3,1,0,1,3,1,1,1,1,
+1,1,0,2,0,1,3,1,1,0,0,1,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,1,
+3,0,2,2,1,3,3,2,3,3,0,1,1,0,2,2,1,2,1,3,3,1,0,0,3,2,0,0,0,0,2,1,
+0,1,0,0,0,0,1,2,0,1,1,3,1,1,2,2,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,
+0,0,3,0,0,1,0,0,0,3,0,0,3,0,3,1,0,1,1,1,3,2,0,0,0,3,0,0,0,0,2,0,
+0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
+3,3,1,3,2,1,3,3,1,2,2,0,1,2,1,0,1,2,0,0,0,0,0,3,0,0,0,3,0,0,0,0,
+3,0,0,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,1,2,0,3,3,3,2,2,0,1,1,0,1,3,0,0,0,2,2,0,0,0,0,3,1,0,1,0,0,0,
+0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,2,3,1,2,0,0,2,1,0,3,1,0,1,2,0,1,1,1,1,3,0,0,3,1,1,0,2,2,1,1,
+0,2,0,0,0,0,0,1,0,1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,0,3,1,2,0,0,2,2,0,1,2,0,1,0,1,3,1,2,1,0,0,0,2,0,3,0,0,0,1,0,
+0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,1,1,2,2,0,0,0,2,0,2,1,0,1,1,0,1,1,1,2,1,0,0,1,1,1,0,2,1,1,1,
+0,1,1,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,1,
+0,0,0,2,0,1,3,1,1,1,1,0,0,0,0,3,2,0,1,0,0,0,1,2,0,0,0,1,0,0,0,0,
+0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,3,3,3,3,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,0,2,3,2,2,0,0,0,1,0,0,0,0,2,3,2,1,2,2,3,0,0,0,2,3,1,0,0,0,1,1,
+0,0,1,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,
+3,3,2,2,0,1,0,0,0,0,2,0,2,0,1,0,0,0,1,1,0,0,0,2,1,0,1,0,1,1,0,0,
+0,1,0,2,0,0,1,0,3,0,1,0,0,0,2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,1,0,0,1,0,0,0,0,0,1,1,2,0,0,0,0,1,0,0,1,3,1,0,0,0,0,1,1,0,0,
+0,1,0,0,0,0,3,0,0,0,0,0,0,3,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,
+3,3,1,1,1,1,2,3,0,0,2,1,1,1,1,1,0,2,1,1,0,0,0,2,1,0,1,2,1,1,0,1,
+2,1,0,3,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,3,1,0,0,0,0,0,0,0,3,0,0,0,3,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,
+0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,2,0,0,0,0,0,0,1,2,1,0,1,1,0,2,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,2,0,0,0,1,3,0,1,0,0,0,2,0,0,0,0,0,0,0,1,2,0,0,0,0,0,
+3,3,0,0,1,1,2,0,0,1,2,1,0,1,1,1,0,1,1,0,0,2,1,1,0,1,0,0,1,1,1,0,
+0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,1,0,0,0,0,1,0,0,0,0,3,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
+2,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,3,0,0,1,1,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+1,1,0,1,2,0,1,2,0,0,1,1,0,2,0,1,0,0,1,0,0,0,0,1,0,0,0,2,0,0,0,0,
+1,0,0,1,0,1,1,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,1,0,0,0,0,0,0,0,1,1,0,1,1,0,2,1,3,0,0,0,0,1,1,0,0,0,0,0,0,0,3,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,1,0,1,0,0,2,0,0,2,0,0,1,1,2,0,0,1,1,0,0,0,1,0,0,0,1,1,0,0,0,
+1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,
+1,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,1,1,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,0,0,0,2,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,3,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,1,0,0,0,0,
+1,0,0,0,0,0,0,0,0,1,0,0,0,0,2,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,1,1,0,0,2,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+)
+
+TIS620ThaiModel = {
+  'char_to_order_map': TIS620CharToOrderMap,
+  'precedence_matrix': ThaiLangModel,
+  'typical_positive_ratio': 0.926386,
+  'keep_english_letter': False,
+  'charset_name': "TIS-620",
+  'language': 'Thai',
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langturkishmodel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langturkishmodel.py
new file mode 100644
index 0000000..a427a45
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/langturkishmodel.py
@@ -0,0 +1,193 @@
+# -*- coding: utf-8 -*-
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Özgür Baskın - Turkish Language Model
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# 255: Control characters that usually does not exist in any text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+
+# Character Mapping Table:
+Latin5_TurkishCharToOrderMap = (
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
+255, 23, 37, 47, 39, 29, 52, 36, 45, 53, 60, 16, 49, 20, 46, 42,
+ 48, 69, 44, 35, 31, 51, 38, 62, 65, 43, 56,255,255,255,255,255,
+255,  1, 21, 28, 12,  2, 18, 27, 25,  3, 24, 10,  5, 13,  4, 15,
+ 26, 64,  7,  8,  9, 14, 32, 57, 58, 11, 22,255,255,255,255,255,
+180,179,178,177,176,175,174,173,172,171,170,169,168,167,166,165,
+164,163,162,161,160,159,101,158,157,156,155,154,153,152,151,106,
+150,149,148,147,146,145,144,100,143,142,141,140,139,138,137,136,
+ 94, 80, 93,135,105,134,133, 63,132,131,130,129,128,127,126,125,
+124,104, 73, 99, 79, 85,123, 54,122, 98, 92,121,120, 91,103,119,
+ 68,118,117, 97,116,115, 50, 90,114,113,112,111, 55, 41, 40, 86,
+ 89, 70, 59, 78, 71, 82, 88, 33, 77, 66, 84, 83,110, 75, 61, 96,
+ 30, 67,109, 74, 87,102, 34, 95, 81,108, 76, 72, 17,  6, 19,107,
+)
+
+TurkishLangModel = (
+3,2,3,3,3,1,3,3,3,3,3,3,3,3,2,1,1,3,3,1,3,3,0,3,3,3,3,3,0,3,1,3,
+3,2,1,0,0,1,1,0,0,0,1,0,0,1,1,1,1,0,0,0,0,0,0,0,2,2,0,0,1,0,0,1,
+3,2,2,3,3,0,3,3,3,3,3,3,3,2,3,1,0,3,3,1,3,3,0,3,3,3,3,3,0,3,0,3,
+3,1,1,0,1,0,1,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,2,2,0,0,0,1,0,1,
+3,3,2,3,3,0,3,3,3,3,3,3,3,2,3,1,1,3,3,0,3,3,1,2,3,3,3,3,0,3,0,3,
+3,1,1,0,0,0,1,0,0,0,0,1,1,0,1,2,1,0,0,0,1,0,0,0,0,2,0,0,0,0,0,1,
+3,3,3,3,3,3,2,3,3,3,3,3,3,3,3,1,3,3,2,0,3,2,1,2,2,1,3,3,0,0,0,2,
+2,2,0,1,0,0,1,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,0,1,
+3,3,3,2,3,3,1,2,3,3,3,3,3,3,3,1,3,2,1,0,3,2,0,1,2,3,3,2,1,0,0,2,
+2,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,2,0,2,0,0,0,
+1,0,1,3,3,1,3,3,3,3,3,3,3,1,2,0,0,2,3,0,2,3,0,0,2,2,2,3,0,3,0,1,
+2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,3,0,3,2,0,2,3,2,3,3,1,0,0,2,
+3,2,0,0,1,0,0,0,0,0,0,2,0,0,1,0,0,0,0,0,0,0,0,0,1,1,1,0,2,0,0,1,
+3,3,3,2,3,3,2,3,3,3,3,2,3,3,3,0,3,3,0,0,2,1,0,0,2,3,2,2,0,0,0,2,
+2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,1,0,1,0,2,0,0,1,
+3,3,3,2,3,3,3,3,3,3,3,2,3,3,3,0,3,2,0,1,3,2,1,1,3,2,3,2,1,0,0,2,
+2,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,
+3,3,3,2,3,3,3,3,3,3,3,2,3,3,3,0,3,2,2,0,2,3,0,0,2,2,2,2,0,0,0,2,
+3,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,2,0,1,0,0,0,
+3,3,3,3,3,3,3,2,2,2,2,3,2,3,3,0,3,3,1,1,2,2,0,0,2,2,3,2,0,0,1,3,
+0,3,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,1,
+3,3,3,2,3,3,3,2,1,2,2,3,2,3,3,0,3,2,0,0,1,1,0,1,1,2,1,2,0,0,0,1,
+0,3,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,0,0,0,
+3,3,3,2,3,3,2,3,2,2,2,3,3,3,3,1,3,1,1,0,3,2,1,1,3,3,2,3,1,0,0,1,
+1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,2,0,0,1,
+3,2,2,3,3,0,3,3,3,3,3,3,3,2,2,1,0,3,3,1,3,3,0,1,3,3,2,3,0,3,0,3,
+2,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
+2,2,2,3,3,0,3,3,3,3,3,3,3,3,3,0,0,3,2,0,3,3,0,3,2,3,3,3,0,3,1,3,
+2,0,0,0,0,0,0,0,0,0,0,1,0,1,2,0,1,0,0,0,0,0,0,0,2,2,0,0,1,0,0,1,
+3,3,3,1,2,3,3,1,0,0,1,0,0,3,3,2,3,0,0,2,0,0,2,0,2,0,0,0,2,0,2,0,
+0,3,1,0,1,0,0,0,2,2,1,0,1,1,2,1,2,2,2,0,2,1,1,0,0,0,2,0,0,0,0,0,
+1,2,1,3,3,0,3,3,3,3,3,2,3,0,0,0,0,2,3,0,2,3,1,0,2,3,1,3,0,3,0,2,
+3,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,1,3,3,2,2,3,2,2,0,1,2,3,0,1,2,1,0,1,0,0,0,1,0,2,2,0,0,0,1,
+1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,0,
+3,3,3,1,3,3,1,1,3,3,1,1,3,3,1,0,2,1,2,0,2,1,0,0,1,1,2,1,0,0,0,2,
+2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,1,0,2,1,3,0,0,2,0,0,3,3,0,3,0,0,1,0,1,2,0,0,1,1,2,2,0,1,0,
+0,1,2,1,1,0,1,0,1,1,1,1,1,0,1,1,1,2,2,1,2,0,1,0,0,0,0,0,0,1,0,0,
+3,3,3,2,3,2,3,3,0,2,2,2,3,3,3,0,3,0,0,0,2,2,0,1,2,1,1,1,0,0,0,1,
+0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
+3,3,3,3,3,3,2,1,2,2,3,3,3,3,2,0,2,0,0,0,2,2,0,0,2,1,3,3,0,0,1,1,
+1,1,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,
+1,1,2,3,3,0,3,3,3,3,3,3,2,2,0,2,0,2,3,2,3,2,2,2,2,2,2,2,1,3,2,3,
+2,0,2,1,2,2,2,2,1,1,2,2,1,2,2,1,2,0,0,2,1,1,0,2,1,0,0,1,0,0,0,1,
+2,3,3,1,1,1,0,1,1,1,2,3,2,1,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,
+0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,2,2,2,3,2,3,2,2,1,3,3,3,0,2,1,2,0,2,1,0,0,1,1,1,1,1,0,0,1,
+2,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,2,0,1,0,0,0,
+3,3,3,2,3,3,3,3,3,2,3,1,2,3,3,1,2,0,0,0,0,0,0,0,3,2,1,1,0,0,0,0,
+2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
+3,3,3,2,2,3,3,2,1,1,1,1,1,3,3,0,3,1,0,0,1,1,0,0,3,1,2,1,0,0,0,0,
+0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,
+3,3,3,2,2,3,2,2,2,3,2,1,1,3,3,0,3,0,0,0,0,1,0,0,3,1,1,2,0,0,0,1,
+1,0,0,1,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
+1,1,1,3,3,0,3,3,3,3,3,2,2,2,1,2,0,2,1,2,2,1,1,0,1,2,2,2,2,2,2,2,
+0,0,2,1,2,1,2,1,0,1,1,3,1,2,1,1,2,0,0,2,0,1,0,1,0,1,0,0,0,1,0,1,
+3,3,3,1,3,3,3,0,1,1,0,2,2,3,1,0,3,0,0,0,1,0,0,0,1,0,0,1,0,1,0,0,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,2,0,0,2,2,1,0,0,1,0,0,3,3,1,3,0,0,1,1,0,2,0,3,0,0,0,2,0,1,1,
+0,1,2,0,1,2,2,0,2,2,2,2,1,0,2,1,1,0,2,0,2,1,2,0,0,0,0,0,0,0,0,0,
+3,3,3,1,3,2,3,2,0,2,2,2,1,3,2,0,2,1,2,0,1,2,0,0,1,0,2,2,0,0,0,2,
+1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,1,0,0,0,
+3,3,3,0,3,3,1,1,2,3,1,0,3,2,3,0,3,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,
+1,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,3,3,0,3,3,2,3,3,2,2,0,0,0,0,1,2,0,1,3,0,0,0,3,1,1,0,3,0,2,
+2,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,1,2,2,1,0,3,1,1,1,1,3,3,2,3,0,0,1,0,1,2,0,2,2,0,2,2,0,2,1,
+0,2,2,1,1,1,1,0,2,1,1,0,1,1,1,1,2,1,2,1,2,0,1,0,1,0,0,0,0,0,0,0,
+3,3,3,0,1,1,3,0,0,1,1,0,0,2,2,0,3,0,0,1,1,0,1,0,0,0,0,0,2,0,0,0,
+0,3,1,0,1,0,1,0,2,0,0,1,0,1,0,1,1,1,2,1,1,0,2,0,0,0,0,0,0,0,0,0,
+3,3,3,0,2,0,2,0,1,1,1,0,0,3,3,0,2,0,0,1,0,0,2,1,1,0,1,0,1,0,1,0,
+0,2,0,1,2,0,2,0,2,1,1,0,1,0,2,1,1,0,2,1,1,0,1,0,0,0,1,1,0,0,0,0,
+3,2,3,0,1,0,0,0,0,0,0,0,0,1,2,0,1,0,0,1,0,0,1,0,0,0,0,0,2,0,0,0,
+0,0,1,1,0,0,1,0,1,0,0,1,0,0,0,2,1,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,0,0,2,3,0,0,1,0,1,0,2,3,2,3,0,0,1,3,0,2,1,0,0,0,0,2,0,1,0,
+0,2,1,0,0,1,1,0,2,1,0,0,1,0,0,1,1,0,1,1,2,0,1,0,0,0,0,1,0,0,0,0,
+3,2,2,0,0,1,1,0,0,0,0,0,0,3,1,1,1,0,0,0,0,0,1,0,0,0,0,0,2,0,1,0,
+0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,3,3,0,2,3,2,2,1,2,2,1,1,2,0,1,3,2,2,2,0,0,2,2,0,0,0,1,2,1,
+3,0,2,1,1,0,1,1,1,0,1,2,2,2,1,1,2,0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,
+0,1,1,2,3,0,3,3,3,2,2,2,2,1,0,1,0,1,0,1,2,2,0,0,2,2,1,3,1,1,2,1,
+0,0,1,1,2,0,1,1,0,0,1,2,0,2,1,1,2,0,0,1,0,0,0,1,0,1,0,1,0,0,0,0,
+3,3,2,0,0,3,1,0,0,0,0,0,0,3,2,1,2,0,0,1,0,0,2,0,0,0,0,0,2,0,1,0,
+0,2,1,1,0,0,1,0,1,2,0,0,1,1,0,0,2,1,1,1,1,0,2,0,0,0,0,0,0,0,0,0,
+3,3,2,0,0,1,0,0,0,0,1,0,0,3,3,2,2,0,0,1,0,0,2,0,1,0,0,0,2,0,1,0,
+0,0,1,1,0,0,2,0,2,1,0,0,1,1,2,1,2,0,2,1,2,1,1,1,0,0,1,1,0,0,0,0,
+3,3,2,0,0,2,2,0,0,0,1,1,0,2,2,1,3,1,0,1,0,1,2,0,0,0,0,0,1,0,1,0,
+0,1,1,0,0,0,0,0,1,0,0,1,0,0,0,1,1,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,2,0,0,0,1,0,0,1,0,0,2,3,1,2,0,0,1,0,0,2,0,0,0,1,0,2,0,2,0,
+0,1,1,2,2,1,2,0,2,1,1,0,0,1,1,0,1,1,1,1,2,1,1,0,0,0,0,0,0,0,0,0,
+3,3,3,0,2,1,2,1,0,0,1,1,0,3,3,1,2,0,0,1,0,0,2,0,2,0,1,1,2,0,0,0,
+0,0,1,1,1,1,2,0,1,1,0,1,1,1,1,0,0,0,1,1,1,0,1,0,0,0,1,0,0,0,0,0,
+3,3,3,0,2,2,3,2,0,0,1,0,0,2,3,1,0,0,0,0,0,0,2,0,2,0,0,0,2,0,0,0,
+0,1,1,0,0,0,1,0,0,1,0,1,1,0,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0,
+3,2,3,0,0,0,0,0,0,0,1,0,0,2,2,2,2,0,0,1,0,0,2,0,0,0,0,0,2,0,1,0,
+0,0,2,1,1,0,1,0,2,1,1,0,0,1,1,2,1,0,2,0,2,0,1,0,0,0,2,0,0,0,0,0,
+0,0,0,2,2,0,2,1,1,1,1,2,2,0,0,1,0,1,0,0,1,3,0,0,0,0,1,0,0,2,1,0,
+0,0,1,0,1,0,0,0,0,0,2,1,0,1,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,
+2,0,0,2,3,0,2,3,1,2,2,0,2,0,0,2,0,2,1,1,1,2,1,0,0,1,2,1,1,2,1,0,
+1,0,2,0,1,0,1,1,0,0,2,2,1,2,1,1,2,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,
+3,3,3,0,2,1,2,0,0,0,1,0,0,3,2,0,1,0,0,1,0,0,2,0,0,0,1,2,1,0,1,0,
+0,0,0,0,1,0,1,0,0,1,0,0,0,0,1,0,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,2,2,0,2,2,1,1,0,1,1,1,1,1,0,0,1,2,1,1,1,0,1,0,0,0,1,1,1,1,
+0,0,2,1,0,1,1,1,0,1,1,2,1,2,1,1,2,0,1,1,2,1,0,2,0,0,0,0,0,0,0,0,
+3,2,2,0,0,2,0,0,0,0,0,0,0,2,2,0,2,0,0,1,0,0,2,0,0,0,0,0,2,0,0,0,
+0,2,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,3,2,0,2,2,0,1,1,0,1,0,0,1,0,0,0,1,0,1,0,0,0,0,0,1,0,0,0,0,
+2,0,1,0,1,0,1,1,0,0,1,2,0,1,0,1,1,0,0,1,0,1,0,2,0,0,0,0,0,0,0,0,
+2,2,2,0,1,1,0,0,0,1,0,0,0,1,2,0,1,0,0,1,0,0,1,0,0,0,0,1,2,0,1,0,
+0,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,1,0,1,0,2,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,2,1,0,1,1,1,0,0,0,0,1,2,0,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,
+1,1,2,0,1,0,0,0,1,0,1,0,0,0,1,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,1,
+0,0,1,2,2,0,2,1,2,1,1,2,2,0,0,0,0,1,0,0,1,1,0,0,2,0,0,0,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,
+2,2,2,0,0,0,1,0,0,0,0,0,0,2,2,1,1,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,
+0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,1,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+2,2,2,0,1,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,1,0,0,0,0,0,0,0,0,0,0,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+)
+
+Latin5TurkishModel = {
+  'char_to_order_map': Latin5_TurkishCharToOrderMap,
+  'precedence_matrix': TurkishLangModel,
+  'typical_positive_ratio': 0.970290,
+  'keep_english_letter': True,
+  'charset_name': "ISO-8859-9",
+  'language': 'Turkish',
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/latin1prober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/latin1prober.py
new file mode 100644
index 0000000..7d1e8c2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/latin1prober.py
@@ -0,0 +1,145 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState
+
+FREQ_CAT_NUM = 4
+
+UDF = 0  # undefined
+OTH = 1  # other
+ASC = 2  # ascii capital letter
+ASS = 3  # ascii small letter
+ACV = 4  # accent capital vowel
+ACO = 5  # accent capital other
+ASV = 6  # accent small vowel
+ASO = 7  # accent small other
+CLASS_NUM = 8  # total classes
+
+Latin1_CharToClass = (
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 00 - 07
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 08 - 0F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 10 - 17
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 18 - 1F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 20 - 27
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 28 - 2F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 30 - 37
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 38 - 3F
+    OTH, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 40 - 47
+    ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 48 - 4F
+    ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 50 - 57
+    ASC, ASC, ASC, OTH, OTH, OTH, OTH, OTH,   # 58 - 5F
+    OTH, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 60 - 67
+    ASS, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 68 - 6F
+    ASS, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 70 - 77
+    ASS, ASS, ASS, OTH, OTH, OTH, OTH, OTH,   # 78 - 7F
+    OTH, UDF, OTH, ASO, OTH, OTH, OTH, OTH,   # 80 - 87
+    OTH, OTH, ACO, OTH, ACO, UDF, ACO, UDF,   # 88 - 8F
+    UDF, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 90 - 97
+    OTH, OTH, ASO, OTH, ASO, UDF, ASO, ACO,   # 98 - 9F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # A0 - A7
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # A8 - AF
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # B0 - B7
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # B8 - BF
+    ACV, ACV, ACV, ACV, ACV, ACV, ACO, ACO,   # C0 - C7
+    ACV, ACV, ACV, ACV, ACV, ACV, ACV, ACV,   # C8 - CF
+    ACO, ACO, ACV, ACV, ACV, ACV, ACV, OTH,   # D0 - D7
+    ACV, ACV, ACV, ACV, ACV, ACO, ACO, ACO,   # D8 - DF
+    ASV, ASV, ASV, ASV, ASV, ASV, ASO, ASO,   # E0 - E7
+    ASV, ASV, ASV, ASV, ASV, ASV, ASV, ASV,   # E8 - EF
+    ASO, ASO, ASV, ASV, ASV, ASV, ASV, OTH,   # F0 - F7
+    ASV, ASV, ASV, ASV, ASV, ASO, ASO, ASO,   # F8 - FF
+)
+
+# 0 : illegal
+# 1 : very unlikely
+# 2 : normal
+# 3 : very likely
+Latin1ClassModel = (
+# UDF OTH ASC ASS ACV ACO ASV ASO
+    0,  0,  0,  0,  0,  0,  0,  0,  # UDF
+    0,  3,  3,  3,  3,  3,  3,  3,  # OTH
+    0,  3,  3,  3,  3,  3,  3,  3,  # ASC
+    0,  3,  3,  3,  1,  1,  3,  3,  # ASS
+    0,  3,  3,  3,  1,  2,  1,  2,  # ACV
+    0,  3,  3,  3,  3,  3,  3,  3,  # ACO
+    0,  3,  1,  3,  1,  1,  1,  3,  # ASV
+    0,  3,  1,  3,  1,  1,  3,  3,  # ASO
+)
+
+
+class Latin1Prober(CharSetProber):
+    def __init__(self):
+        super(Latin1Prober, self).__init__()
+        self._last_char_class = None
+        self._freq_counter = None
+        self.reset()
+
+    def reset(self):
+        self._last_char_class = OTH
+        self._freq_counter = [0] * FREQ_CAT_NUM
+        CharSetProber.reset(self)
+
+    @property
+    def charset_name(self):
+        return "ISO-8859-1"
+
+    @property
+    def language(self):
+        return ""
+
+    def feed(self, byte_str):
+        byte_str = self.filter_with_english_letters(byte_str)
+        for c in byte_str:
+            char_class = Latin1_CharToClass[c]
+            freq = Latin1ClassModel[(self._last_char_class * CLASS_NUM)
+                                    + char_class]
+            if freq == 0:
+                self._state = ProbingState.NOT_ME
+                break
+            self._freq_counter[freq] += 1
+            self._last_char_class = char_class
+
+        return self.state
+
+    def get_confidence(self):
+        if self.state == ProbingState.NOT_ME:
+            return 0.01
+
+        total = sum(self._freq_counter)
+        if total < 0.01:
+            confidence = 0.0
+        else:
+            confidence = ((self._freq_counter[3] - self._freq_counter[1] * 20.0)
+                          / total)
+        if confidence < 0.0:
+            confidence = 0.0
+        # lower the confidence of latin1 so that other more accurate
+        # detector can take priority.
+        confidence = confidence * 0.73
+        return confidence
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/mbcharsetprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/mbcharsetprober.py
new file mode 100644
index 0000000..6256ecf
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/mbcharsetprober.py
@@ -0,0 +1,91 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#   Proofpoint, Inc.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState, MachineState
+
+
+class MultiByteCharSetProber(CharSetProber):
+    """
+    MultiByteCharSetProber
+    """
+
+    def __init__(self, lang_filter=None):
+        super(MultiByteCharSetProber, self).__init__(lang_filter=lang_filter)
+        self.distribution_analyzer = None
+        self.coding_sm = None
+        self._last_char = [0, 0]
+
+    def reset(self):
+        super(MultiByteCharSetProber, self).reset()
+        if self.coding_sm:
+            self.coding_sm.reset()
+        if self.distribution_analyzer:
+            self.distribution_analyzer.reset()
+        self._last_char = [0, 0]
+
+    @property
+    def charset_name(self):
+        raise NotImplementedError
+
+    @property
+    def language(self):
+        raise NotImplementedError
+
+    def feed(self, byte_str):
+        for i in range(len(byte_str)):
+            coding_state = self.coding_sm.next_state(byte_str[i])
+            if coding_state == MachineState.ERROR:
+                self.logger.debug('%s %s prober hit error at byte %s',
+                                  self.charset_name, self.language, i)
+                self._state = ProbingState.NOT_ME
+                break
+            elif coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            elif coding_state == MachineState.START:
+                char_len = self.coding_sm.get_current_charlen()
+                if i == 0:
+                    self._last_char[1] = byte_str[0]
+                    self.distribution_analyzer.feed(self._last_char, char_len)
+                else:
+                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
+                                                    char_len)
+
+        self._last_char[0] = byte_str[-1]
+
+        if self.state == ProbingState.DETECTING:
+            if (self.distribution_analyzer.got_enough_data() and
+                    (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        return self.distribution_analyzer.get_confidence()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/mbcsgroupprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/mbcsgroupprober.py
new file mode 100644
index 0000000..530abe7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/mbcsgroupprober.py
@@ -0,0 +1,54 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#   Proofpoint, Inc.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetgroupprober import CharSetGroupProber
+from .utf8prober import UTF8Prober
+from .sjisprober import SJISProber
+from .eucjpprober import EUCJPProber
+from .gb2312prober import GB2312Prober
+from .euckrprober import EUCKRProber
+from .cp949prober import CP949Prober
+from .big5prober import Big5Prober
+from .euctwprober import EUCTWProber
+
+
+class MBCSGroupProber(CharSetGroupProber):
+    def __init__(self, lang_filter=None):
+        super(MBCSGroupProber, self).__init__(lang_filter=lang_filter)
+        self.probers = [
+            UTF8Prober(),
+            SJISProber(),
+            EUCJPProber(),
+            GB2312Prober(),
+            EUCKRProber(),
+            CP949Prober(),
+            Big5Prober(),
+            EUCTWProber()
+        ]
+        self.reset()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/mbcssm.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/mbcssm.py
new file mode 100644
index 0000000..8360d0f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/mbcssm.py
@@ -0,0 +1,572 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import MachineState
+
+# BIG5
+
+BIG5_CLS = (
+    1,1,1,1,1,1,1,1,  # 00 - 07    #allow 0x00 as legal value
+    1,1,1,1,1,1,0,0,  # 08 - 0f
+    1,1,1,1,1,1,1,1,  # 10 - 17
+    1,1,1,0,1,1,1,1,  # 18 - 1f
+    1,1,1,1,1,1,1,1,  # 20 - 27
+    1,1,1,1,1,1,1,1,  # 28 - 2f
+    1,1,1,1,1,1,1,1,  # 30 - 37
+    1,1,1,1,1,1,1,1,  # 38 - 3f
+    2,2,2,2,2,2,2,2,  # 40 - 47
+    2,2,2,2,2,2,2,2,  # 48 - 4f
+    2,2,2,2,2,2,2,2,  # 50 - 57
+    2,2,2,2,2,2,2,2,  # 58 - 5f
+    2,2,2,2,2,2,2,2,  # 60 - 67
+    2,2,2,2,2,2,2,2,  # 68 - 6f
+    2,2,2,2,2,2,2,2,  # 70 - 77
+    2,2,2,2,2,2,2,1,  # 78 - 7f
+    4,4,4,4,4,4,4,4,  # 80 - 87
+    4,4,4,4,4,4,4,4,  # 88 - 8f
+    4,4,4,4,4,4,4,4,  # 90 - 97
+    4,4,4,4,4,4,4,4,  # 98 - 9f
+    4,3,3,3,3,3,3,3,  # a0 - a7
+    3,3,3,3,3,3,3,3,  # a8 - af
+    3,3,3,3,3,3,3,3,  # b0 - b7
+    3,3,3,3,3,3,3,3,  # b8 - bf
+    3,3,3,3,3,3,3,3,  # c0 - c7
+    3,3,3,3,3,3,3,3,  # c8 - cf
+    3,3,3,3,3,3,3,3,  # d0 - d7
+    3,3,3,3,3,3,3,3,  # d8 - df
+    3,3,3,3,3,3,3,3,  # e0 - e7
+    3,3,3,3,3,3,3,3,  # e8 - ef
+    3,3,3,3,3,3,3,3,  # f0 - f7
+    3,3,3,3,3,3,3,0  # f8 - ff
+)
+
+BIG5_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,#08-0f
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START#10-17
+)
+
+BIG5_CHAR_LEN_TABLE = (0, 1, 1, 2, 0)
+
+BIG5_SM_MODEL = {'class_table': BIG5_CLS,
+                 'class_factor': 5,
+                 'state_table': BIG5_ST,
+                 'char_len_table': BIG5_CHAR_LEN_TABLE,
+                 'name': 'Big5'}
+
+# CP949
+
+CP949_CLS  = (
+    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,0,0,  # 00 - 0f
+    1,1,1,1,1,1,1,1, 1,1,1,0,1,1,1,1,  # 10 - 1f
+    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,  # 20 - 2f
+    1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,  # 30 - 3f
+    1,4,4,4,4,4,4,4, 4,4,4,4,4,4,4,4,  # 40 - 4f
+    4,4,5,5,5,5,5,5, 5,5,5,1,1,1,1,1,  # 50 - 5f
+    1,5,5,5,5,5,5,5, 5,5,5,5,5,5,5,5,  # 60 - 6f
+    5,5,5,5,5,5,5,5, 5,5,5,1,1,1,1,1,  # 70 - 7f
+    0,6,6,6,6,6,6,6, 6,6,6,6,6,6,6,6,  # 80 - 8f
+    6,6,6,6,6,6,6,6, 6,6,6,6,6,6,6,6,  # 90 - 9f
+    6,7,7,7,7,7,7,7, 7,7,7,7,7,8,8,8,  # a0 - af
+    7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,  # b0 - bf
+    7,7,7,7,7,7,9,2, 2,3,2,2,2,2,2,2,  # c0 - cf
+    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,  # d0 - df
+    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,  # e0 - ef
+    2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,0,  # f0 - ff
+)
+
+CP949_ST = (
+#cls=    0      1      2      3      4      5      6      7      8      9  # previous state =
+    MachineState.ERROR,MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,     4,     5,MachineState.ERROR,     6, # MachineState.START
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR, # MachineState.ERROR
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME, # MachineState.ITS_ME
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START, # 3
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START, # 4
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START, # 5
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START, # 6
+)
+
+CP949_CHAR_LEN_TABLE = (0, 1, 2, 0, 1, 1, 2, 2, 0, 2)
+
+CP949_SM_MODEL = {'class_table': CP949_CLS,
+                  'class_factor': 10,
+                  'state_table': CP949_ST,
+                  'char_len_table': CP949_CHAR_LEN_TABLE,
+                  'name': 'CP949'}
+
+# EUC-JP
+
+EUCJP_CLS = (
+    4,4,4,4,4,4,4,4,  # 00 - 07
+    4,4,4,4,4,4,5,5,  # 08 - 0f
+    4,4,4,4,4,4,4,4,  # 10 - 17
+    4,4,4,5,4,4,4,4,  # 18 - 1f
+    4,4,4,4,4,4,4,4,  # 20 - 27
+    4,4,4,4,4,4,4,4,  # 28 - 2f
+    4,4,4,4,4,4,4,4,  # 30 - 37
+    4,4,4,4,4,4,4,4,  # 38 - 3f
+    4,4,4,4,4,4,4,4,  # 40 - 47
+    4,4,4,4,4,4,4,4,  # 48 - 4f
+    4,4,4,4,4,4,4,4,  # 50 - 57
+    4,4,4,4,4,4,4,4,  # 58 - 5f
+    4,4,4,4,4,4,4,4,  # 60 - 67
+    4,4,4,4,4,4,4,4,  # 68 - 6f
+    4,4,4,4,4,4,4,4,  # 70 - 77
+    4,4,4,4,4,4,4,4,  # 78 - 7f
+    5,5,5,5,5,5,5,5,  # 80 - 87
+    5,5,5,5,5,5,1,3,  # 88 - 8f
+    5,5,5,5,5,5,5,5,  # 90 - 97
+    5,5,5,5,5,5,5,5,  # 98 - 9f
+    5,2,2,2,2,2,2,2,  # a0 - a7
+    2,2,2,2,2,2,2,2,  # a8 - af
+    2,2,2,2,2,2,2,2,  # b0 - b7
+    2,2,2,2,2,2,2,2,  # b8 - bf
+    2,2,2,2,2,2,2,2,  # c0 - c7
+    2,2,2,2,2,2,2,2,  # c8 - cf
+    2,2,2,2,2,2,2,2,  # d0 - d7
+    2,2,2,2,2,2,2,2,  # d8 - df
+    0,0,0,0,0,0,0,0,  # e0 - e7
+    0,0,0,0,0,0,0,0,  # e8 - ef
+    0,0,0,0,0,0,0,0,  # f0 - f7
+    0,0,0,0,0,0,0,5  # f8 - ff
+)
+
+EUCJP_ST = (
+          3,     4,     3,     5,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+     MachineState.ITS_ME,MachineState.ITS_ME,MachineState.START,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#10-17
+     MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     3,MachineState.ERROR,#18-1f
+          3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START#20-27
+)
+
+EUCJP_CHAR_LEN_TABLE = (2, 2, 2, 3, 1, 0)
+
+EUCJP_SM_MODEL = {'class_table': EUCJP_CLS,
+                  'class_factor': 6,
+                  'state_table': EUCJP_ST,
+                  'char_len_table': EUCJP_CHAR_LEN_TABLE,
+                  'name': 'EUC-JP'}
+
+# EUC-KR
+
+EUCKR_CLS  = (
+    1,1,1,1,1,1,1,1,  # 00 - 07
+    1,1,1,1,1,1,0,0,  # 08 - 0f
+    1,1,1,1,1,1,1,1,  # 10 - 17
+    1,1,1,0,1,1,1,1,  # 18 - 1f
+    1,1,1,1,1,1,1,1,  # 20 - 27
+    1,1,1,1,1,1,1,1,  # 28 - 2f
+    1,1,1,1,1,1,1,1,  # 30 - 37
+    1,1,1,1,1,1,1,1,  # 38 - 3f
+    1,1,1,1,1,1,1,1,  # 40 - 47
+    1,1,1,1,1,1,1,1,  # 48 - 4f
+    1,1,1,1,1,1,1,1,  # 50 - 57
+    1,1,1,1,1,1,1,1,  # 58 - 5f
+    1,1,1,1,1,1,1,1,  # 60 - 67
+    1,1,1,1,1,1,1,1,  # 68 - 6f
+    1,1,1,1,1,1,1,1,  # 70 - 77
+    1,1,1,1,1,1,1,1,  # 78 - 7f
+    0,0,0,0,0,0,0,0,  # 80 - 87
+    0,0,0,0,0,0,0,0,  # 88 - 8f
+    0,0,0,0,0,0,0,0,  # 90 - 97
+    0,0,0,0,0,0,0,0,  # 98 - 9f
+    0,2,2,2,2,2,2,2,  # a0 - a7
+    2,2,2,2,2,3,3,3,  # a8 - af
+    2,2,2,2,2,2,2,2,  # b0 - b7
+    2,2,2,2,2,2,2,2,  # b8 - bf
+    2,2,2,2,2,2,2,2,  # c0 - c7
+    2,3,2,2,2,2,2,2,  # c8 - cf
+    2,2,2,2,2,2,2,2,  # d0 - d7
+    2,2,2,2,2,2,2,2,  # d8 - df
+    2,2,2,2,2,2,2,2,  # e0 - e7
+    2,2,2,2,2,2,2,2,  # e8 - ef
+    2,2,2,2,2,2,2,2,  # f0 - f7
+    2,2,2,2,2,2,2,0   # f8 - ff
+)
+
+EUCKR_ST = (
+    MachineState.ERROR,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START #08-0f
+)
+
+EUCKR_CHAR_LEN_TABLE = (0, 1, 2, 0)
+
+EUCKR_SM_MODEL = {'class_table': EUCKR_CLS,
+                'class_factor': 4,
+                'state_table': EUCKR_ST,
+                'char_len_table': EUCKR_CHAR_LEN_TABLE,
+                'name': 'EUC-KR'}
+
+# EUC-TW
+
+EUCTW_CLS = (
+    2,2,2,2,2,2,2,2,  # 00 - 07
+    2,2,2,2,2,2,0,0,  # 08 - 0f
+    2,2,2,2,2,2,2,2,  # 10 - 17
+    2,2,2,0,2,2,2,2,  # 18 - 1f
+    2,2,2,2,2,2,2,2,  # 20 - 27
+    2,2,2,2,2,2,2,2,  # 28 - 2f
+    2,2,2,2,2,2,2,2,  # 30 - 37
+    2,2,2,2,2,2,2,2,  # 38 - 3f
+    2,2,2,2,2,2,2,2,  # 40 - 47
+    2,2,2,2,2,2,2,2,  # 48 - 4f
+    2,2,2,2,2,2,2,2,  # 50 - 57
+    2,2,2,2,2,2,2,2,  # 58 - 5f
+    2,2,2,2,2,2,2,2,  # 60 - 67
+    2,2,2,2,2,2,2,2,  # 68 - 6f
+    2,2,2,2,2,2,2,2,  # 70 - 77
+    2,2,2,2,2,2,2,2,  # 78 - 7f
+    0,0,0,0,0,0,0,0,  # 80 - 87
+    0,0,0,0,0,0,6,0,  # 88 - 8f
+    0,0,0,0,0,0,0,0,  # 90 - 97
+    0,0,0,0,0,0,0,0,  # 98 - 9f
+    0,3,4,4,4,4,4,4,  # a0 - a7
+    5,5,1,1,1,1,1,1,  # a8 - af
+    1,1,1,1,1,1,1,1,  # b0 - b7
+    1,1,1,1,1,1,1,1,  # b8 - bf
+    1,1,3,1,3,3,3,3,  # c0 - c7
+    3,3,3,3,3,3,3,3,  # c8 - cf
+    3,3,3,3,3,3,3,3,  # d0 - d7
+    3,3,3,3,3,3,3,3,  # d8 - df
+    3,3,3,3,3,3,3,3,  # e0 - e7
+    3,3,3,3,3,3,3,3,  # e8 - ef
+    3,3,3,3,3,3,3,3,  # f0 - f7
+    3,3,3,3,3,3,3,0   # f8 - ff
+)
+
+EUCTW_ST = (
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,     3,     3,     3,     4,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,MachineState.ERROR,#10-17
+    MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
+         5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.START,MachineState.START,#20-27
+    MachineState.START,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START #28-2f
+)
+
+EUCTW_CHAR_LEN_TABLE = (0, 0, 1, 2, 2, 2, 3)
+
+EUCTW_SM_MODEL = {'class_table': EUCTW_CLS,
+                'class_factor': 7,
+                'state_table': EUCTW_ST,
+                'char_len_table': EUCTW_CHAR_LEN_TABLE,
+                'name': 'x-euc-tw'}
+
+# GB2312
+
+GB2312_CLS = (
+    1,1,1,1,1,1,1,1,  # 00 - 07
+    1,1,1,1,1,1,0,0,  # 08 - 0f
+    1,1,1,1,1,1,1,1,  # 10 - 17
+    1,1,1,0,1,1,1,1,  # 18 - 1f
+    1,1,1,1,1,1,1,1,  # 20 - 27
+    1,1,1,1,1,1,1,1,  # 28 - 2f
+    3,3,3,3,3,3,3,3,  # 30 - 37
+    3,3,1,1,1,1,1,1,  # 38 - 3f
+    2,2,2,2,2,2,2,2,  # 40 - 47
+    2,2,2,2,2,2,2,2,  # 48 - 4f
+    2,2,2,2,2,2,2,2,  # 50 - 57
+    2,2,2,2,2,2,2,2,  # 58 - 5f
+    2,2,2,2,2,2,2,2,  # 60 - 67
+    2,2,2,2,2,2,2,2,  # 68 - 6f
+    2,2,2,2,2,2,2,2,  # 70 - 77
+    2,2,2,2,2,2,2,4,  # 78 - 7f
+    5,6,6,6,6,6,6,6,  # 80 - 87
+    6,6,6,6,6,6,6,6,  # 88 - 8f
+    6,6,6,6,6,6,6,6,  # 90 - 97
+    6,6,6,6,6,6,6,6,  # 98 - 9f
+    6,6,6,6,6,6,6,6,  # a0 - a7
+    6,6,6,6,6,6,6,6,  # a8 - af
+    6,6,6,6,6,6,6,6,  # b0 - b7
+    6,6,6,6,6,6,6,6,  # b8 - bf
+    6,6,6,6,6,6,6,6,  # c0 - c7
+    6,6,6,6,6,6,6,6,  # c8 - cf
+    6,6,6,6,6,6,6,6,  # d0 - d7
+    6,6,6,6,6,6,6,6,  # d8 - df
+    6,6,6,6,6,6,6,6,  # e0 - e7
+    6,6,6,6,6,6,6,6,  # e8 - ef
+    6,6,6,6,6,6,6,6,  # f0 - f7
+    6,6,6,6,6,6,6,0   # f8 - ff
+)
+
+GB2312_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,     3,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,#10-17
+         4,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
+    MachineState.ERROR,MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,#20-27
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START #28-2f
+)
+
+# To be accurate, the length of class 6 can be either 2 or 4.
+# But it is not necessary to discriminate between the two since
+# it is used for frequency analysis only, and we are validating
+# each code range there as well. So it is safe to set it to be
+# 2 here.
+GB2312_CHAR_LEN_TABLE = (0, 1, 1, 1, 1, 1, 2)
+
+GB2312_SM_MODEL = {'class_table': GB2312_CLS,
+                   'class_factor': 7,
+                   'state_table': GB2312_ST,
+                   'char_len_table': GB2312_CHAR_LEN_TABLE,
+                   'name': 'GB2312'}
+
+# Shift_JIS
+
+SJIS_CLS = (
+    1,1,1,1,1,1,1,1,  # 00 - 07
+    1,1,1,1,1,1,0,0,  # 08 - 0f
+    1,1,1,1,1,1,1,1,  # 10 - 17
+    1,1,1,0,1,1,1,1,  # 18 - 1f
+    1,1,1,1,1,1,1,1,  # 20 - 27
+    1,1,1,1,1,1,1,1,  # 28 - 2f
+    1,1,1,1,1,1,1,1,  # 30 - 37
+    1,1,1,1,1,1,1,1,  # 38 - 3f
+    2,2,2,2,2,2,2,2,  # 40 - 47
+    2,2,2,2,2,2,2,2,  # 48 - 4f
+    2,2,2,2,2,2,2,2,  # 50 - 57
+    2,2,2,2,2,2,2,2,  # 58 - 5f
+    2,2,2,2,2,2,2,2,  # 60 - 67
+    2,2,2,2,2,2,2,2,  # 68 - 6f
+    2,2,2,2,2,2,2,2,  # 70 - 77
+    2,2,2,2,2,2,2,1,  # 78 - 7f
+    3,3,3,3,3,2,2,3,  # 80 - 87
+    3,3,3,3,3,3,3,3,  # 88 - 8f
+    3,3,3,3,3,3,3,3,  # 90 - 97
+    3,3,3,3,3,3,3,3,  # 98 - 9f
+    #0xa0 is illegal in sjis encoding, but some pages does
+    #contain such byte. We need to be more error forgiven.
+    2,2,2,2,2,2,2,2,  # a0 - a7
+    2,2,2,2,2,2,2,2,  # a8 - af
+    2,2,2,2,2,2,2,2,  # b0 - b7
+    2,2,2,2,2,2,2,2,  # b8 - bf
+    2,2,2,2,2,2,2,2,  # c0 - c7
+    2,2,2,2,2,2,2,2,  # c8 - cf
+    2,2,2,2,2,2,2,2,  # d0 - d7
+    2,2,2,2,2,2,2,2,  # d8 - df
+    3,3,3,3,3,3,3,3,  # e0 - e7
+    3,3,3,3,3,4,4,4,  # e8 - ef
+    3,3,3,3,3,3,3,3,  # f0 - f7
+    3,3,3,3,3,0,0,0)  # f8 - ff
+
+
+SJIS_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START #10-17
+)
+
+SJIS_CHAR_LEN_TABLE = (0, 1, 1, 2, 0, 0)
+
+SJIS_SM_MODEL = {'class_table': SJIS_CLS,
+               'class_factor': 6,
+               'state_table': SJIS_ST,
+               'char_len_table': SJIS_CHAR_LEN_TABLE,
+               'name': 'Shift_JIS'}
+
+# UCS2-BE
+
+UCS2BE_CLS = (
+    0,0,0,0,0,0,0,0,  # 00 - 07
+    0,0,1,0,0,2,0,0,  # 08 - 0f
+    0,0,0,0,0,0,0,0,  # 10 - 17
+    0,0,0,3,0,0,0,0,  # 18 - 1f
+    0,0,0,0,0,0,0,0,  # 20 - 27
+    0,3,3,3,3,3,0,0,  # 28 - 2f
+    0,0,0,0,0,0,0,0,  # 30 - 37
+    0,0,0,0,0,0,0,0,  # 38 - 3f
+    0,0,0,0,0,0,0,0,  # 40 - 47
+    0,0,0,0,0,0,0,0,  # 48 - 4f
+    0,0,0,0,0,0,0,0,  # 50 - 57
+    0,0,0,0,0,0,0,0,  # 58 - 5f
+    0,0,0,0,0,0,0,0,  # 60 - 67
+    0,0,0,0,0,0,0,0,  # 68 - 6f
+    0,0,0,0,0,0,0,0,  # 70 - 77
+    0,0,0,0,0,0,0,0,  # 78 - 7f
+    0,0,0,0,0,0,0,0,  # 80 - 87
+    0,0,0,0,0,0,0,0,  # 88 - 8f
+    0,0,0,0,0,0,0,0,  # 90 - 97
+    0,0,0,0,0,0,0,0,  # 98 - 9f
+    0,0,0,0,0,0,0,0,  # a0 - a7
+    0,0,0,0,0,0,0,0,  # a8 - af
+    0,0,0,0,0,0,0,0,  # b0 - b7
+    0,0,0,0,0,0,0,0,  # b8 - bf
+    0,0,0,0,0,0,0,0,  # c0 - c7
+    0,0,0,0,0,0,0,0,  # c8 - cf
+    0,0,0,0,0,0,0,0,  # d0 - d7
+    0,0,0,0,0,0,0,0,  # d8 - df
+    0,0,0,0,0,0,0,0,  # e0 - e7
+    0,0,0,0,0,0,0,0,  # e8 - ef
+    0,0,0,0,0,0,0,0,  # f0 - f7
+    0,0,0,0,0,0,4,5   # f8 - ff
+)
+
+UCS2BE_ST  = (
+          5,     7,     7,MachineState.ERROR,     4,     3,MachineState.ERROR,MachineState.ERROR,#00-07
+     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+     MachineState.ITS_ME,MachineState.ITS_ME,     6,     6,     6,     6,MachineState.ERROR,MachineState.ERROR,#10-17
+          6,     6,     6,     6,     6,MachineState.ITS_ME,     6,     6,#18-1f
+          6,     6,     6,     6,     5,     7,     7,MachineState.ERROR,#20-27
+          5,     8,     6,     6,MachineState.ERROR,     6,     6,     6,#28-2f
+          6,     6,     6,     6,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START #30-37
+)
+
+UCS2BE_CHAR_LEN_TABLE = (2, 2, 2, 0, 2, 2)
+
+UCS2BE_SM_MODEL = {'class_table': UCS2BE_CLS,
+                   'class_factor': 6,
+                   'state_table': UCS2BE_ST,
+                   'char_len_table': UCS2BE_CHAR_LEN_TABLE,
+                   'name': 'UTF-16BE'}
+
+# UCS2-LE
+
+UCS2LE_CLS = (
+    0,0,0,0,0,0,0,0,  # 00 - 07
+    0,0,1,0,0,2,0,0,  # 08 - 0f
+    0,0,0,0,0,0,0,0,  # 10 - 17
+    0,0,0,3,0,0,0,0,  # 18 - 1f
+    0,0,0,0,0,0,0,0,  # 20 - 27
+    0,3,3,3,3,3,0,0,  # 28 - 2f
+    0,0,0,0,0,0,0,0,  # 30 - 37
+    0,0,0,0,0,0,0,0,  # 38 - 3f
+    0,0,0,0,0,0,0,0,  # 40 - 47
+    0,0,0,0,0,0,0,0,  # 48 - 4f
+    0,0,0,0,0,0,0,0,  # 50 - 57
+    0,0,0,0,0,0,0,0,  # 58 - 5f
+    0,0,0,0,0,0,0,0,  # 60 - 67
+    0,0,0,0,0,0,0,0,  # 68 - 6f
+    0,0,0,0,0,0,0,0,  # 70 - 77
+    0,0,0,0,0,0,0,0,  # 78 - 7f
+    0,0,0,0,0,0,0,0,  # 80 - 87
+    0,0,0,0,0,0,0,0,  # 88 - 8f
+    0,0,0,0,0,0,0,0,  # 90 - 97
+    0,0,0,0,0,0,0,0,  # 98 - 9f
+    0,0,0,0,0,0,0,0,  # a0 - a7
+    0,0,0,0,0,0,0,0,  # a8 - af
+    0,0,0,0,0,0,0,0,  # b0 - b7
+    0,0,0,0,0,0,0,0,  # b8 - bf
+    0,0,0,0,0,0,0,0,  # c0 - c7
+    0,0,0,0,0,0,0,0,  # c8 - cf
+    0,0,0,0,0,0,0,0,  # d0 - d7
+    0,0,0,0,0,0,0,0,  # d8 - df
+    0,0,0,0,0,0,0,0,  # e0 - e7
+    0,0,0,0,0,0,0,0,  # e8 - ef
+    0,0,0,0,0,0,0,0,  # f0 - f7
+    0,0,0,0,0,0,4,5   # f8 - ff
+)
+
+UCS2LE_ST = (
+          6,     6,     7,     6,     4,     3,MachineState.ERROR,MachineState.ERROR,#00-07
+     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+     MachineState.ITS_ME,MachineState.ITS_ME,     5,     5,     5,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,#10-17
+          5,     5,     5,MachineState.ERROR,     5,MachineState.ERROR,     6,     6,#18-1f
+          7,     6,     8,     8,     5,     5,     5,MachineState.ERROR,#20-27
+          5,     5,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,     5,#28-2f
+          5,     5,     5,MachineState.ERROR,     5,MachineState.ERROR,MachineState.START,MachineState.START #30-37
+)
+
+UCS2LE_CHAR_LEN_TABLE = (2, 2, 2, 2, 2, 2)
+
+UCS2LE_SM_MODEL = {'class_table': UCS2LE_CLS,
+                 'class_factor': 6,
+                 'state_table': UCS2LE_ST,
+                 'char_len_table': UCS2LE_CHAR_LEN_TABLE,
+                 'name': 'UTF-16LE'}
+
+# UTF-8
+
+UTF8_CLS = (
+    1,1,1,1,1,1,1,1,  # 00 - 07  #allow 0x00 as a legal value
+    1,1,1,1,1,1,0,0,  # 08 - 0f
+    1,1,1,1,1,1,1,1,  # 10 - 17
+    1,1,1,0,1,1,1,1,  # 18 - 1f
+    1,1,1,1,1,1,1,1,  # 20 - 27
+    1,1,1,1,1,1,1,1,  # 28 - 2f
+    1,1,1,1,1,1,1,1,  # 30 - 37
+    1,1,1,1,1,1,1,1,  # 38 - 3f
+    1,1,1,1,1,1,1,1,  # 40 - 47
+    1,1,1,1,1,1,1,1,  # 48 - 4f
+    1,1,1,1,1,1,1,1,  # 50 - 57
+    1,1,1,1,1,1,1,1,  # 58 - 5f
+    1,1,1,1,1,1,1,1,  # 60 - 67
+    1,1,1,1,1,1,1,1,  # 68 - 6f
+    1,1,1,1,1,1,1,1,  # 70 - 77
+    1,1,1,1,1,1,1,1,  # 78 - 7f
+    2,2,2,2,3,3,3,3,  # 80 - 87
+    4,4,4,4,4,4,4,4,  # 88 - 8f
+    4,4,4,4,4,4,4,4,  # 90 - 97
+    4,4,4,4,4,4,4,4,  # 98 - 9f
+    5,5,5,5,5,5,5,5,  # a0 - a7
+    5,5,5,5,5,5,5,5,  # a8 - af
+    5,5,5,5,5,5,5,5,  # b0 - b7
+    5,5,5,5,5,5,5,5,  # b8 - bf
+    0,0,6,6,6,6,6,6,  # c0 - c7
+    6,6,6,6,6,6,6,6,  # c8 - cf
+    6,6,6,6,6,6,6,6,  # d0 - d7
+    6,6,6,6,6,6,6,6,  # d8 - df
+    7,8,8,8,8,8,8,8,  # e0 - e7
+    8,8,8,8,8,9,8,8,  # e8 - ef
+    10,11,11,11,11,11,11,11,  # f0 - f7
+    12,13,13,13,14,15,0,0    # f8 - ff
+)
+
+UTF8_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     12,   10,#00-07
+         9,     11,     8,     7,     6,     5,     4,    3,#08-0f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#10-17
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#20-27
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#28-2f
+    MachineState.ERROR,MachineState.ERROR,     5,     5,     5,     5,MachineState.ERROR,MachineState.ERROR,#30-37
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#38-3f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,     5,     5,MachineState.ERROR,MachineState.ERROR,#40-47
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#48-4f
+    MachineState.ERROR,MachineState.ERROR,     7,     7,     7,     7,MachineState.ERROR,MachineState.ERROR,#50-57
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#58-5f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     7,     7,MachineState.ERROR,MachineState.ERROR,#60-67
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#68-6f
+    MachineState.ERROR,MachineState.ERROR,     9,     9,     9,     9,MachineState.ERROR,MachineState.ERROR,#70-77
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#78-7f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     9,MachineState.ERROR,MachineState.ERROR,#80-87
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#88-8f
+    MachineState.ERROR,MachineState.ERROR,    12,    12,    12,    12,MachineState.ERROR,MachineState.ERROR,#90-97
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#98-9f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,    12,MachineState.ERROR,MachineState.ERROR,#a0-a7
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#a8-af
+    MachineState.ERROR,MachineState.ERROR,    12,    12,    12,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#b0-b7
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#b8-bf
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,#c0-c7
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR #c8-cf
+)
+
+UTF8_CHAR_LEN_TABLE = (0, 1, 0, 0, 0, 0, 2, 3, 3, 3, 4, 4, 5, 5, 6, 6)
+
+UTF8_SM_MODEL = {'class_table': UTF8_CLS,
+                 'class_factor': 16,
+                 'state_table': UTF8_ST,
+                 'char_len_table': UTF8_CHAR_LEN_TABLE,
+                 'name': 'UTF-8'}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/sbcharsetprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/sbcharsetprober.py
new file mode 100644
index 0000000..0adb51d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/sbcharsetprober.py
@@ -0,0 +1,132 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import CharacterCategory, ProbingState, SequenceLikelihood
+
+
+class SingleByteCharSetProber(CharSetProber):
+    SAMPLE_SIZE = 64
+    SB_ENOUGH_REL_THRESHOLD = 1024  #  0.25 * SAMPLE_SIZE^2
+    POSITIVE_SHORTCUT_THRESHOLD = 0.95
+    NEGATIVE_SHORTCUT_THRESHOLD = 0.05
+
+    def __init__(self, model, reversed=False, name_prober=None):
+        super(SingleByteCharSetProber, self).__init__()
+        self._model = model
+        # TRUE if we need to reverse every pair in the model lookup
+        self._reversed = reversed
+        # Optional auxiliary prober for name decision
+        self._name_prober = name_prober
+        self._last_order = None
+        self._seq_counters = None
+        self._total_seqs = None
+        self._total_char = None
+        self._freq_char = None
+        self.reset()
+
+    def reset(self):
+        super(SingleByteCharSetProber, self).reset()
+        # char order of last character
+        self._last_order = 255
+        self._seq_counters = [0] * SequenceLikelihood.get_num_categories()
+        self._total_seqs = 0
+        self._total_char = 0
+        # characters that fall in our sampling range
+        self._freq_char = 0
+
+    @property
+    def charset_name(self):
+        if self._name_prober:
+            return self._name_prober.charset_name
+        else:
+            return self._model['charset_name']
+
+    @property
+    def language(self):
+        if self._name_prober:
+            return self._name_prober.language
+        else:
+            return self._model.get('language')
+
+    def feed(self, byte_str):
+        if not self._model['keep_english_letter']:
+            byte_str = self.filter_international_words(byte_str)
+        if not byte_str:
+            return self.state
+        char_to_order_map = self._model['char_to_order_map']
+        for i, c in enumerate(byte_str):
+            # XXX: Order is in range 1-64, so one would think we want 0-63 here,
+            #      but that leads to 27 more test failures than before.
+            order = char_to_order_map[c]
+            # XXX: This was SYMBOL_CAT_ORDER before, with a value of 250, but
+            #      CharacterCategory.SYMBOL is actually 253, so we use CONTROL
+            #      to make it closer to the original intent. The only difference
+            #      is whether or not we count digits and control characters for
+            #      _total_char purposes.
+            if order < CharacterCategory.CONTROL:
+                self._total_char += 1
+            if order < self.SAMPLE_SIZE:
+                self._freq_char += 1
+                if self._last_order < self.SAMPLE_SIZE:
+                    self._total_seqs += 1
+                    if not self._reversed:
+                        i = (self._last_order * self.SAMPLE_SIZE) + order
+                        model = self._model['precedence_matrix'][i]
+                    else:  # reverse the order of the letters in the lookup
+                        i = (order * self.SAMPLE_SIZE) + self._last_order
+                        model = self._model['precedence_matrix'][i]
+                    self._seq_counters[model] += 1
+            self._last_order = order
+
+        charset_name = self._model['charset_name']
+        if self.state == ProbingState.DETECTING:
+            if self._total_seqs > self.SB_ENOUGH_REL_THRESHOLD:
+                confidence = self.get_confidence()
+                if confidence > self.POSITIVE_SHORTCUT_THRESHOLD:
+                    self.logger.debug('%s confidence = %s, we have a winner',
+                                      charset_name, confidence)
+                    self._state = ProbingState.FOUND_IT
+                elif confidence < self.NEGATIVE_SHORTCUT_THRESHOLD:
+                    self.logger.debug('%s confidence = %s, below negative '
+                                      'shortcut threshhold %s', charset_name,
+                                      confidence,
+                                      self.NEGATIVE_SHORTCUT_THRESHOLD)
+                    self._state = ProbingState.NOT_ME
+
+        return self.state
+
+    def get_confidence(self):
+        r = 0.01
+        if self._total_seqs > 0:
+            r = ((1.0 * self._seq_counters[SequenceLikelihood.POSITIVE]) /
+                 self._total_seqs / self._model['typical_positive_ratio'])
+            r = r * self._freq_char / self._total_char
+            if r >= 1.0:
+                r = 0.99
+        return r
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/sbcsgroupprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/sbcsgroupprober.py
new file mode 100644
index 0000000..98e95dc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/sbcsgroupprober.py
@@ -0,0 +1,73 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetgroupprober import CharSetGroupProber
+from .sbcharsetprober import SingleByteCharSetProber
+from .langcyrillicmodel import (Win1251CyrillicModel, Koi8rModel,
+                                Latin5CyrillicModel, MacCyrillicModel,
+                                Ibm866Model, Ibm855Model)
+from .langgreekmodel import Latin7GreekModel, Win1253GreekModel
+from .langbulgarianmodel import Latin5BulgarianModel, Win1251BulgarianModel
+# from .langhungarianmodel import Latin2HungarianModel, Win1250HungarianModel
+from .langthaimodel import TIS620ThaiModel
+from .langhebrewmodel import Win1255HebrewModel
+from .hebrewprober import HebrewProber
+from .langturkishmodel import Latin5TurkishModel
+
+
+class SBCSGroupProber(CharSetGroupProber):
+    def __init__(self):
+        super(SBCSGroupProber, self).__init__()
+        self.probers = [
+            SingleByteCharSetProber(Win1251CyrillicModel),
+            SingleByteCharSetProber(Koi8rModel),
+            SingleByteCharSetProber(Latin5CyrillicModel),
+            SingleByteCharSetProber(MacCyrillicModel),
+            SingleByteCharSetProber(Ibm866Model),
+            SingleByteCharSetProber(Ibm855Model),
+            SingleByteCharSetProber(Latin7GreekModel),
+            SingleByteCharSetProber(Win1253GreekModel),
+            SingleByteCharSetProber(Latin5BulgarianModel),
+            SingleByteCharSetProber(Win1251BulgarianModel),
+            # TODO: Restore Hungarian encodings (iso-8859-2 and windows-1250)
+            #       after we retrain model.
+            # SingleByteCharSetProber(Latin2HungarianModel),
+            # SingleByteCharSetProber(Win1250HungarianModel),
+            SingleByteCharSetProber(TIS620ThaiModel),
+            SingleByteCharSetProber(Latin5TurkishModel),
+        ]
+        hebrew_prober = HebrewProber()
+        logical_hebrew_prober = SingleByteCharSetProber(Win1255HebrewModel,
+                                                        False, hebrew_prober)
+        visual_hebrew_prober = SingleByteCharSetProber(Win1255HebrewModel, True,
+                                                       hebrew_prober)
+        hebrew_prober.set_model_probers(logical_hebrew_prober, visual_hebrew_prober)
+        self.probers.extend([hebrew_prober, logical_hebrew_prober,
+                             visual_hebrew_prober])
+
+        self.reset()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/sjisprober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/sjisprober.py
new file mode 100644
index 0000000..9e29623
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/sjisprober.py
@@ -0,0 +1,92 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .mbcharsetprober import MultiByteCharSetProber
+from .codingstatemachine import CodingStateMachine
+from .chardistribution import SJISDistributionAnalysis
+from .jpcntx import SJISContextAnalysis
+from .mbcssm import SJIS_SM_MODEL
+from .enums import ProbingState, MachineState
+
+
+class SJISProber(MultiByteCharSetProber):
+    def __init__(self):
+        super(SJISProber, self).__init__()
+        self.coding_sm = CodingStateMachine(SJIS_SM_MODEL)
+        self.distribution_analyzer = SJISDistributionAnalysis()
+        self.context_analyzer = SJISContextAnalysis()
+        self.reset()
+
+    def reset(self):
+        super(SJISProber, self).reset()
+        self.context_analyzer.reset()
+
+    @property
+    def charset_name(self):
+        return self.context_analyzer.charset_name
+
+    @property
+    def language(self):
+        return "Japanese"
+
+    def feed(self, byte_str):
+        for i in range(len(byte_str)):
+            coding_state = self.coding_sm.next_state(byte_str[i])
+            if coding_state == MachineState.ERROR:
+                self.logger.debug('%s %s prober hit error at byte %s',
+                                  self.charset_name, self.language, i)
+                self._state = ProbingState.NOT_ME
+                break
+            elif coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            elif coding_state == MachineState.START:
+                char_len = self.coding_sm.get_current_charlen()
+                if i == 0:
+                    self._last_char[1] = byte_str[0]
+                    self.context_analyzer.feed(self._last_char[2 - char_len:],
+                                               char_len)
+                    self.distribution_analyzer.feed(self._last_char, char_len)
+                else:
+                    self.context_analyzer.feed(byte_str[i + 1 - char_len:i + 3
+                                                        - char_len], char_len)
+                    self.distribution_analyzer.feed(byte_str[i - 1:i + 1],
+                                                    char_len)
+
+        self._last_char[0] = byte_str[-1]
+
+        if self.state == ProbingState.DETECTING:
+            if (self.context_analyzer.got_enough_data() and
+               (self.get_confidence() > self.SHORTCUT_THRESHOLD)):
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        context_conf = self.context_analyzer.get_confidence()
+        distrib_conf = self.distribution_analyzer.get_confidence()
+        return max(context_conf, distrib_conf)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/universaldetector.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/universaldetector.py
new file mode 100644
index 0000000..7b4e92d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/universaldetector.py
@@ -0,0 +1,286 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+"""
+Module containing the UniversalDetector detector class, which is the primary
+class a user of ``chardet`` should use.
+
+:author: Mark Pilgrim (initial port to Python)
+:author: Shy Shalom (original C code)
+:author: Dan Blanchard (major refactoring for 3.0)
+:author: Ian Cordasco
+"""
+
+
+import codecs
+import logging
+import re
+
+from .charsetgroupprober import CharSetGroupProber
+from .enums import InputState, LanguageFilter, ProbingState
+from .escprober import EscCharSetProber
+from .latin1prober import Latin1Prober
+from .mbcsgroupprober import MBCSGroupProber
+from .sbcsgroupprober import SBCSGroupProber
+
+
+class UniversalDetector(object):
+    """
+    The ``UniversalDetector`` class underlies the ``chardet.detect`` function
+    and coordinates all of the different charset probers.
+
+    To get a ``dict`` containing an encoding and its confidence, you can simply
+    run:
+
+    .. code::
+
+            u = UniversalDetector()
+            u.feed(some_bytes)
+            u.close()
+            detected = u.result
+
+    """
+
+    MINIMUM_THRESHOLD = 0.20
+    HIGH_BYTE_DETECTOR = re.compile(b'[\x80-\xFF]')
+    ESC_DETECTOR = re.compile(b'(\033|~{)')
+    WIN_BYTE_DETECTOR = re.compile(b'[\x80-\x9F]')
+    ISO_WIN_MAP = {'iso-8859-1': 'Windows-1252',
+                   'iso-8859-2': 'Windows-1250',
+                   'iso-8859-5': 'Windows-1251',
+                   'iso-8859-6': 'Windows-1256',
+                   'iso-8859-7': 'Windows-1253',
+                   'iso-8859-8': 'Windows-1255',
+                   'iso-8859-9': 'Windows-1254',
+                   'iso-8859-13': 'Windows-1257'}
+
+    def __init__(self, lang_filter=LanguageFilter.ALL):
+        self._esc_charset_prober = None
+        self._charset_probers = []
+        self.result = None
+        self.done = None
+        self._got_data = None
+        self._input_state = None
+        self._last_char = None
+        self.lang_filter = lang_filter
+        self.logger = logging.getLogger(__name__)
+        self._has_win_bytes = None
+        self.reset()
+
+    def reset(self):
+        """
+        Reset the UniversalDetector and all of its probers back to their
+        initial states.  This is called by ``__init__``, so you only need to
+        call this directly in between analyses of different documents.
+        """
+        self.result = {'encoding': None, 'confidence': 0.0, 'language': None}
+        self.done = False
+        self._got_data = False
+        self._has_win_bytes = False
+        self._input_state = InputState.PURE_ASCII
+        self._last_char = b''
+        if self._esc_charset_prober:
+            self._esc_charset_prober.reset()
+        for prober in self._charset_probers:
+            prober.reset()
+
+    def feed(self, byte_str):
+        """
+        Takes a chunk of a document and feeds it through all of the relevant
+        charset probers.
+
+        After calling ``feed``, you can check the value of the ``done``
+        attribute to see if you need to continue feeding the
+        ``UniversalDetector`` more data, or if it has made a prediction
+        (in the ``result`` attribute).
+
+        .. note::
+           You should always call ``close`` when you're done feeding in your
+           document if ``done`` is not already ``True``.
+        """
+        if self.done:
+            return
+
+        if not len(byte_str):
+            return
+
+        if not isinstance(byte_str, bytearray):
+            byte_str = bytearray(byte_str)
+
+        # First check for known BOMs, since these are guaranteed to be correct
+        if not self._got_data:
+            # If the data starts with BOM, we know it is UTF
+            if byte_str.startswith(codecs.BOM_UTF8):
+                # EF BB BF  UTF-8 with BOM
+                self.result = {'encoding': "UTF-8-SIG",
+                               'confidence': 1.0,
+                               'language': ''}
+            elif byte_str.startswith((codecs.BOM_UTF32_LE,
+                                      codecs.BOM_UTF32_BE)):
+                # FF FE 00 00  UTF-32, little-endian BOM
+                # 00 00 FE FF  UTF-32, big-endian BOM
+                self.result = {'encoding': "UTF-32",
+                               'confidence': 1.0,
+                               'language': ''}
+            elif byte_str.startswith(b'\xFE\xFF\x00\x00'):
+                # FE FF 00 00  UCS-4, unusual octet order BOM (3412)
+                self.result = {'encoding': "X-ISO-10646-UCS-4-3412",
+                               'confidence': 1.0,
+                               'language': ''}
+            elif byte_str.startswith(b'\x00\x00\xFF\xFE'):
+                # 00 00 FF FE  UCS-4, unusual octet order BOM (2143)
+                self.result = {'encoding': "X-ISO-10646-UCS-4-2143",
+                               'confidence': 1.0,
+                               'language': ''}
+            elif byte_str.startswith((codecs.BOM_LE, codecs.BOM_BE)):
+                # FF FE  UTF-16, little endian BOM
+                # FE FF  UTF-16, big endian BOM
+                self.result = {'encoding': "UTF-16",
+                               'confidence': 1.0,
+                               'language': ''}
+
+            self._got_data = True
+            if self.result['encoding'] is not None:
+                self.done = True
+                return
+
+        # If none of those matched and we've only see ASCII so far, check
+        # for high bytes and escape sequences
+        if self._input_state == InputState.PURE_ASCII:
+            if self.HIGH_BYTE_DETECTOR.search(byte_str):
+                self._input_state = InputState.HIGH_BYTE
+            elif self._input_state == InputState.PURE_ASCII and \
+                    self.ESC_DETECTOR.search(self._last_char + byte_str):
+                self._input_state = InputState.ESC_ASCII
+
+        self._last_char = byte_str[-1:]
+
+        # If we've seen escape sequences, use the EscCharSetProber, which
+        # uses a simple state machine to check for known escape sequences in
+        # HZ and ISO-2022 encodings, since those are the only encodings that
+        # use such sequences.
+        if self._input_state == InputState.ESC_ASCII:
+            if not self._esc_charset_prober:
+                self._esc_charset_prober = EscCharSetProber(self.lang_filter)
+            if self._esc_charset_prober.feed(byte_str) == ProbingState.FOUND_IT:
+                self.result = {'encoding':
+                               self._esc_charset_prober.charset_name,
+                               'confidence':
+                               self._esc_charset_prober.get_confidence(),
+                               'language':
+                               self._esc_charset_prober.language}
+                self.done = True
+        # If we've seen high bytes (i.e., those with values greater than 127),
+        # we need to do more complicated checks using all our multi-byte and
+        # single-byte probers that are left.  The single-byte probers
+        # use character bigram distributions to determine the encoding, whereas
+        # the multi-byte probers use a combination of character unigram and
+        # bigram distributions.
+        elif self._input_state == InputState.HIGH_BYTE:
+            if not self._charset_probers:
+                self._charset_probers = [MBCSGroupProber(self.lang_filter)]
+                # If we're checking non-CJK encodings, use single-byte prober
+                if self.lang_filter & LanguageFilter.NON_CJK:
+                    self._charset_probers.append(SBCSGroupProber())
+                self._charset_probers.append(Latin1Prober())
+            for prober in self._charset_probers:
+                if prober.feed(byte_str) == ProbingState.FOUND_IT:
+                    self.result = {'encoding': prober.charset_name,
+                                   'confidence': prober.get_confidence(),
+                                   'language': prober.language}
+                    self.done = True
+                    break
+            if self.WIN_BYTE_DETECTOR.search(byte_str):
+                self._has_win_bytes = True
+
+    def close(self):
+        """
+        Stop analyzing the current document and come up with a final
+        prediction.
+
+        :returns:  The ``result`` attribute, a ``dict`` with the keys
+                   `encoding`, `confidence`, and `language`.
+        """
+        # Don't bother with checks if we're already done
+        if self.done:
+            return self.result
+        self.done = True
+
+        if not self._got_data:
+            self.logger.debug('no data received!')
+
+        # Default to ASCII if it is all we've seen so far
+        elif self._input_state == InputState.PURE_ASCII:
+            self.result = {'encoding': 'ascii',
+                           'confidence': 1.0,
+                           'language': ''}
+
+        # If we have seen non-ASCII, return the best that met MINIMUM_THRESHOLD
+        elif self._input_state == InputState.HIGH_BYTE:
+            prober_confidence = None
+            max_prober_confidence = 0.0
+            max_prober = None
+            for prober in self._charset_probers:
+                if not prober:
+                    continue
+                prober_confidence = prober.get_confidence()
+                if prober_confidence > max_prober_confidence:
+                    max_prober_confidence = prober_confidence
+                    max_prober = prober
+            if max_prober and (max_prober_confidence > self.MINIMUM_THRESHOLD):
+                charset_name = max_prober.charset_name
+                lower_charset_name = max_prober.charset_name.lower()
+                confidence = max_prober.get_confidence()
+                # Use Windows encoding name instead of ISO-8859 if we saw any
+                # extra Windows-specific bytes
+                if lower_charset_name.startswith('iso-8859'):
+                    if self._has_win_bytes:
+                        charset_name = self.ISO_WIN_MAP.get(lower_charset_name,
+                                                            charset_name)
+                self.result = {'encoding': charset_name,
+                               'confidence': confidence,
+                               'language': max_prober.language}
+
+        # Log all prober confidences if none met MINIMUM_THRESHOLD
+        if self.logger.getEffectiveLevel() == logging.DEBUG:
+            if self.result['encoding'] is None:
+                self.logger.debug('no probers hit minimum threshold')
+                for group_prober in self._charset_probers:
+                    if not group_prober:
+                        continue
+                    if isinstance(group_prober, CharSetGroupProber):
+                        for prober in group_prober.probers:
+                            self.logger.debug('%s %s confidence = %s',
+                                              prober.charset_name,
+                                              prober.language,
+                                              prober.get_confidence())
+                    else:
+                        self.logger.debug('%s %s confidence = %s',
+                                          prober.charset_name,
+                                          prober.language,
+                                          prober.get_confidence())
+        return self.result
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/utf8prober.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/utf8prober.py
new file mode 100644
index 0000000..6c3196c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/utf8prober.py
@@ -0,0 +1,82 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState, MachineState
+from .codingstatemachine import CodingStateMachine
+from .mbcssm import UTF8_SM_MODEL
+
+
+
+class UTF8Prober(CharSetProber):
+    ONE_CHAR_PROB = 0.5
+
+    def __init__(self):
+        super(UTF8Prober, self).__init__()
+        self.coding_sm = CodingStateMachine(UTF8_SM_MODEL)
+        self._num_mb_chars = None
+        self.reset()
+
+    def reset(self):
+        super(UTF8Prober, self).reset()
+        self.coding_sm.reset()
+        self._num_mb_chars = 0
+
+    @property
+    def charset_name(self):
+        return "utf-8"
+
+    @property
+    def language(self):
+        return ""
+
+    def feed(self, byte_str):
+        for c in byte_str:
+            coding_state = self.coding_sm.next_state(c)
+            if coding_state == MachineState.ERROR:
+                self._state = ProbingState.NOT_ME
+                break
+            elif coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            elif coding_state == MachineState.START:
+                if self.coding_sm.get_current_charlen() >= 2:
+                    self._num_mb_chars += 1
+
+        if self.state == ProbingState.DETECTING:
+            if self.get_confidence() > self.SHORTCUT_THRESHOLD:
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        unlike = 0.99
+        if self._num_mb_chars < 6:
+            unlike *= self.ONE_CHAR_PROB ** self._num_mb_chars
+            return 1.0 - unlike
+        else:
+            return unlike
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/version.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/version.py
new file mode 100644
index 0000000..bb2a34a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/chardet/version.py
@@ -0,0 +1,9 @@
+"""
+This module exists only to simplify retrieving the version number of chardet
+from within setup.py and from chardet subpackages.
+
+:author: Dan Blanchard (dan.blanchard@gmail.com)
+"""
+
+__version__ = "3.0.4"
+VERSION = __version__.split('.')
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/__init__.py
new file mode 100644
index 0000000..34c263c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/__init__.py
@@ -0,0 +1,6 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+from .initialise import init, deinit, reinit, colorama_text
+from .ansi import Fore, Back, Style, Cursor
+from .ansitowin32 import AnsiToWin32
+
+__version__ = '0.4.3'
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/ansi.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/ansi.py
new file mode 100644
index 0000000..7877658
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/ansi.py
@@ -0,0 +1,102 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+'''
+This module generates ANSI character codes to printing colors to terminals.
+See: http://en.wikipedia.org/wiki/ANSI_escape_code
+'''
+
+CSI = '\033['
+OSC = '\033]'
+BEL = '\007'
+
+
+def code_to_chars(code):
+    return CSI + str(code) + 'm'
+
+def set_title(title):
+    return OSC + '2;' + title + BEL
+
+def clear_screen(mode=2):
+    return CSI + str(mode) + 'J'
+
+def clear_line(mode=2):
+    return CSI + str(mode) + 'K'
+
+
+class AnsiCodes(object):
+    def __init__(self):
+        # the subclasses declare class attributes which are numbers.
+        # Upon instantiation we define instance attributes, which are the same
+        # as the class attributes but wrapped with the ANSI escape sequence
+        for name in dir(self):
+            if not name.startswith('_'):
+                value = getattr(self, name)
+                setattr(self, name, code_to_chars(value))
+
+
+class AnsiCursor(object):
+    def UP(self, n=1):
+        return CSI + str(n) + 'A'
+    def DOWN(self, n=1):
+        return CSI + str(n) + 'B'
+    def FORWARD(self, n=1):
+        return CSI + str(n) + 'C'
+    def BACK(self, n=1):
+        return CSI + str(n) + 'D'
+    def POS(self, x=1, y=1):
+        return CSI + str(y) + ';' + str(x) + 'H'
+
+
+class AnsiFore(AnsiCodes):
+    BLACK           = 30
+    RED             = 31
+    GREEN           = 32
+    YELLOW          = 33
+    BLUE            = 34
+    MAGENTA         = 35
+    CYAN            = 36
+    WHITE           = 37
+    RESET           = 39
+
+    # These are fairly well supported, but not part of the standard.
+    LIGHTBLACK_EX   = 90
+    LIGHTRED_EX     = 91
+    LIGHTGREEN_EX   = 92
+    LIGHTYELLOW_EX  = 93
+    LIGHTBLUE_EX    = 94
+    LIGHTMAGENTA_EX = 95
+    LIGHTCYAN_EX    = 96
+    LIGHTWHITE_EX   = 97
+
+
+class AnsiBack(AnsiCodes):
+    BLACK           = 40
+    RED             = 41
+    GREEN           = 42
+    YELLOW          = 43
+    BLUE            = 44
+    MAGENTA         = 45
+    CYAN            = 46
+    WHITE           = 47
+    RESET           = 49
+
+    # These are fairly well supported, but not part of the standard.
+    LIGHTBLACK_EX   = 100
+    LIGHTRED_EX     = 101
+    LIGHTGREEN_EX   = 102
+    LIGHTYELLOW_EX  = 103
+    LIGHTBLUE_EX    = 104
+    LIGHTMAGENTA_EX = 105
+    LIGHTCYAN_EX    = 106
+    LIGHTWHITE_EX   = 107
+
+
+class AnsiStyle(AnsiCodes):
+    BRIGHT    = 1
+    DIM       = 2
+    NORMAL    = 22
+    RESET_ALL = 0
+
+Fore   = AnsiFore()
+Back   = AnsiBack()
+Style  = AnsiStyle()
+Cursor = AnsiCursor()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/ansitowin32.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/ansitowin32.py
new file mode 100644
index 0000000..359c92b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/ansitowin32.py
@@ -0,0 +1,257 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+import re
+import sys
+import os
+
+from .ansi import AnsiFore, AnsiBack, AnsiStyle, Style
+from .winterm import WinTerm, WinColor, WinStyle
+from .win32 import windll, winapi_test
+
+
+winterm = None
+if windll is not None:
+    winterm = WinTerm()
+
+
+class StreamWrapper(object):
+    '''
+    Wraps a stream (such as stdout), acting as a transparent proxy for all
+    attribute access apart from method 'write()', which is delegated to our
+    Converter instance.
+    '''
+    def __init__(self, wrapped, converter):
+        # double-underscore everything to prevent clashes with names of
+        # attributes on the wrapped stream object.
+        self.__wrapped = wrapped
+        self.__convertor = converter
+
+    def __getattr__(self, name):
+        return getattr(self.__wrapped, name)
+
+    def __enter__(self, *args, **kwargs):
+        # special method lookup bypasses __getattr__/__getattribute__, see
+        # https://stackoverflow.com/questions/12632894/why-doesnt-getattr-work-with-exit
+        # thus, contextlib magic methods are not proxied via __getattr__
+        return self.__wrapped.__enter__(*args, **kwargs)
+
+    def __exit__(self, *args, **kwargs):
+        return self.__wrapped.__exit__(*args, **kwargs)
+
+    def write(self, text):
+        self.__convertor.write(text)
+
+    def isatty(self):
+        stream = self.__wrapped
+        if 'PYCHARM_HOSTED' in os.environ:
+            if stream is not None and (stream is sys.__stdout__ or stream is sys.__stderr__):
+                return True
+        try:
+            stream_isatty = stream.isatty
+        except AttributeError:
+            return False
+        else:
+            return stream_isatty()
+
+    @property
+    def closed(self):
+        stream = self.__wrapped
+        try:
+            return stream.closed
+        except AttributeError:
+            return True
+
+
+class AnsiToWin32(object):
+    '''
+    Implements a 'write()' method which, on Windows, will strip ANSI character
+    sequences from the text, and if outputting to a tty, will convert them into
+    win32 function calls.
+    '''
+    ANSI_CSI_RE = re.compile('\001?\033\\[((?:\\d|;)*)([a-zA-Z])\002?')   # Control Sequence Introducer
+    ANSI_OSC_RE = re.compile('\001?\033\\]((?:.|;)*?)(\x07)\002?')        # Operating System Command
+
+    def __init__(self, wrapped, convert=None, strip=None, autoreset=False):
+        # The wrapped stream (normally sys.stdout or sys.stderr)
+        self.wrapped = wrapped
+
+        # should we reset colors to defaults after every .write()
+        self.autoreset = autoreset
+
+        # create the proxy wrapping our output stream
+        self.stream = StreamWrapper(wrapped, self)
+
+        on_windows = os.name == 'nt'
+        # We test if the WinAPI works, because even if we are on Windows
+        # we may be using a terminal that doesn't support the WinAPI
+        # (e.g. Cygwin Terminal). In this case it's up to the terminal
+        # to support the ANSI codes.
+        conversion_supported = on_windows and winapi_test()
+
+        # should we strip ANSI sequences from our output?
+        if strip is None:
+            strip = conversion_supported or (not self.stream.closed and not self.stream.isatty())
+        self.strip = strip
+
+        # should we should convert ANSI sequences into win32 calls?
+        if convert is None:
+            convert = conversion_supported and not self.stream.closed and self.stream.isatty()
+        self.convert = convert
+
+        # dict of ansi codes to win32 functions and parameters
+        self.win32_calls = self.get_win32_calls()
+
+        # are we wrapping stderr?
+        self.on_stderr = self.wrapped is sys.stderr
+
+    def should_wrap(self):
+        '''
+        True if this class is actually needed. If false, then the output
+        stream will not be affected, nor will win32 calls be issued, so
+        wrapping stdout is not actually required. This will generally be
+        False on non-Windows platforms, unless optional functionality like
+        autoreset has been requested using kwargs to init()
+        '''
+        return self.convert or self.strip or self.autoreset
+
+    def get_win32_calls(self):
+        if self.convert and winterm:
+            return {
+                AnsiStyle.RESET_ALL: (winterm.reset_all, ),
+                AnsiStyle.BRIGHT: (winterm.style, WinStyle.BRIGHT),
+                AnsiStyle.DIM: (winterm.style, WinStyle.NORMAL),
+                AnsiStyle.NORMAL: (winterm.style, WinStyle.NORMAL),
+                AnsiFore.BLACK: (winterm.fore, WinColor.BLACK),
+                AnsiFore.RED: (winterm.fore, WinColor.RED),
+                AnsiFore.GREEN: (winterm.fore, WinColor.GREEN),
+                AnsiFore.YELLOW: (winterm.fore, WinColor.YELLOW),
+                AnsiFore.BLUE: (winterm.fore, WinColor.BLUE),
+                AnsiFore.MAGENTA: (winterm.fore, WinColor.MAGENTA),
+                AnsiFore.CYAN: (winterm.fore, WinColor.CYAN),
+                AnsiFore.WHITE: (winterm.fore, WinColor.GREY),
+                AnsiFore.RESET: (winterm.fore, ),
+                AnsiFore.LIGHTBLACK_EX: (winterm.fore, WinColor.BLACK, True),
+                AnsiFore.LIGHTRED_EX: (winterm.fore, WinColor.RED, True),
+                AnsiFore.LIGHTGREEN_EX: (winterm.fore, WinColor.GREEN, True),
+                AnsiFore.LIGHTYELLOW_EX: (winterm.fore, WinColor.YELLOW, True),
+                AnsiFore.LIGHTBLUE_EX: (winterm.fore, WinColor.BLUE, True),
+                AnsiFore.LIGHTMAGENTA_EX: (winterm.fore, WinColor.MAGENTA, True),
+                AnsiFore.LIGHTCYAN_EX: (winterm.fore, WinColor.CYAN, True),
+                AnsiFore.LIGHTWHITE_EX: (winterm.fore, WinColor.GREY, True),
+                AnsiBack.BLACK: (winterm.back, WinColor.BLACK),
+                AnsiBack.RED: (winterm.back, WinColor.RED),
+                AnsiBack.GREEN: (winterm.back, WinColor.GREEN),
+                AnsiBack.YELLOW: (winterm.back, WinColor.YELLOW),
+                AnsiBack.BLUE: (winterm.back, WinColor.BLUE),
+                AnsiBack.MAGENTA: (winterm.back, WinColor.MAGENTA),
+                AnsiBack.CYAN: (winterm.back, WinColor.CYAN),
+                AnsiBack.WHITE: (winterm.back, WinColor.GREY),
+                AnsiBack.RESET: (winterm.back, ),
+                AnsiBack.LIGHTBLACK_EX: (winterm.back, WinColor.BLACK, True),
+                AnsiBack.LIGHTRED_EX: (winterm.back, WinColor.RED, True),
+                AnsiBack.LIGHTGREEN_EX: (winterm.back, WinColor.GREEN, True),
+                AnsiBack.LIGHTYELLOW_EX: (winterm.back, WinColor.YELLOW, True),
+                AnsiBack.LIGHTBLUE_EX: (winterm.back, WinColor.BLUE, True),
+                AnsiBack.LIGHTMAGENTA_EX: (winterm.back, WinColor.MAGENTA, True),
+                AnsiBack.LIGHTCYAN_EX: (winterm.back, WinColor.CYAN, True),
+                AnsiBack.LIGHTWHITE_EX: (winterm.back, WinColor.GREY, True),
+            }
+        return dict()
+
+    def write(self, text):
+        if self.strip or self.convert:
+            self.write_and_convert(text)
+        else:
+            self.wrapped.write(text)
+            self.wrapped.flush()
+        if self.autoreset:
+            self.reset_all()
+
+
+    def reset_all(self):
+        if self.convert:
+            self.call_win32('m', (0,))
+        elif not self.strip and not self.stream.closed:
+            self.wrapped.write(Style.RESET_ALL)
+
+
+    def write_and_convert(self, text):
+        '''
+        Write the given text to our wrapped stream, stripping any ANSI
+        sequences from the text, and optionally converting them into win32
+        calls.
+        '''
+        cursor = 0
+        text = self.convert_osc(text)
+        for match in self.ANSI_CSI_RE.finditer(text):
+            start, end = match.span()
+            self.write_plain_text(text, cursor, start)
+            self.convert_ansi(*match.groups())
+            cursor = end
+        self.write_plain_text(text, cursor, len(text))
+
+
+    def write_plain_text(self, text, start, end):
+        if start < end:
+            self.wrapped.write(text[start:end])
+            self.wrapped.flush()
+
+
+    def convert_ansi(self, paramstring, command):
+        if self.convert:
+            params = self.extract_params(command, paramstring)
+            self.call_win32(command, params)
+
+
+    def extract_params(self, command, paramstring):
+        if command in 'Hf':
+            params = tuple(int(p) if len(p) != 0 else 1 for p in paramstring.split(';'))
+            while len(params) < 2:
+                # defaults:
+                params = params + (1,)
+        else:
+            params = tuple(int(p) for p in paramstring.split(';') if len(p) != 0)
+            if len(params) == 0:
+                # defaults:
+                if command in 'JKm':
+                    params = (0,)
+                elif command in 'ABCD':
+                    params = (1,)
+
+        return params
+
+
+    def call_win32(self, command, params):
+        if command == 'm':
+            for param in params:
+                if param in self.win32_calls:
+                    func_args = self.win32_calls[param]
+                    func = func_args[0]
+                    args = func_args[1:]
+                    kwargs = dict(on_stderr=self.on_stderr)
+                    func(*args, **kwargs)
+        elif command in 'J':
+            winterm.erase_screen(params[0], on_stderr=self.on_stderr)
+        elif command in 'K':
+            winterm.erase_line(params[0], on_stderr=self.on_stderr)
+        elif command in 'Hf':     # cursor position - absolute
+            winterm.set_cursor_position(params, on_stderr=self.on_stderr)
+        elif command in 'ABCD':   # cursor position - relative
+            n = params[0]
+            # A - up, B - down, C - forward, D - back
+            x, y = {'A': (0, -n), 'B': (0, n), 'C': (n, 0), 'D': (-n, 0)}[command]
+            winterm.cursor_adjust(x, y, on_stderr=self.on_stderr)
+
+
+    def convert_osc(self, text):
+        for match in self.ANSI_OSC_RE.finditer(text):
+            start, end = match.span()
+            text = text[:start] + text[end:]
+            paramstring, command = match.groups()
+            if command in '\x07':       # \x07 = BEL
+                params = paramstring.split(";")
+                # 0 - change title and icon (we will only change title)
+                # 1 - change icon (we don't support this)
+                # 2 - change title
+                if params[0] in '02':
+                    winterm.set_title(params[1])
+        return text
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/initialise.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/initialise.py
new file mode 100644
index 0000000..430d066
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/initialise.py
@@ -0,0 +1,80 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+import atexit
+import contextlib
+import sys
+
+from .ansitowin32 import AnsiToWin32
+
+
+orig_stdout = None
+orig_stderr = None
+
+wrapped_stdout = None
+wrapped_stderr = None
+
+atexit_done = False
+
+
+def reset_all():
+    if AnsiToWin32 is not None:    # Issue #74: objects might become None at exit
+        AnsiToWin32(orig_stdout).reset_all()
+
+
+def init(autoreset=False, convert=None, strip=None, wrap=True):
+
+    if not wrap and any([autoreset, convert, strip]):
+        raise ValueError('wrap=False conflicts with any other arg=True')
+
+    global wrapped_stdout, wrapped_stderr
+    global orig_stdout, orig_stderr
+
+    orig_stdout = sys.stdout
+    orig_stderr = sys.stderr
+
+    if sys.stdout is None:
+        wrapped_stdout = None
+    else:
+        sys.stdout = wrapped_stdout = \
+            wrap_stream(orig_stdout, convert, strip, autoreset, wrap)
+    if sys.stderr is None:
+        wrapped_stderr = None
+    else:
+        sys.stderr = wrapped_stderr = \
+            wrap_stream(orig_stderr, convert, strip, autoreset, wrap)
+
+    global atexit_done
+    if not atexit_done:
+        atexit.register(reset_all)
+        atexit_done = True
+
+
+def deinit():
+    if orig_stdout is not None:
+        sys.stdout = orig_stdout
+    if orig_stderr is not None:
+        sys.stderr = orig_stderr
+
+
+@contextlib.contextmanager
+def colorama_text(*args, **kwargs):
+    init(*args, **kwargs)
+    try:
+        yield
+    finally:
+        deinit()
+
+
+def reinit():
+    if wrapped_stdout is not None:
+        sys.stdout = wrapped_stdout
+    if wrapped_stderr is not None:
+        sys.stderr = wrapped_stderr
+
+
+def wrap_stream(stream, convert, strip, autoreset, wrap):
+    if wrap:
+        wrapper = AnsiToWin32(stream,
+            convert=convert, strip=strip, autoreset=autoreset)
+        if wrapper.should_wrap():
+            stream = wrapper.stream
+    return stream
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/win32.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/win32.py
new file mode 100644
index 0000000..c2d8360
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/win32.py
@@ -0,0 +1,152 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+
+# from winbase.h
+STDOUT = -11
+STDERR = -12
+
+try:
+    import ctypes
+    from ctypes import LibraryLoader
+    windll = LibraryLoader(ctypes.WinDLL)
+    from ctypes import wintypes
+except (AttributeError, ImportError):
+    windll = None
+    SetConsoleTextAttribute = lambda *_: None
+    winapi_test = lambda *_: None
+else:
+    from ctypes import byref, Structure, c_char, POINTER
+
+    COORD = wintypes._COORD
+
+    class CONSOLE_SCREEN_BUFFER_INFO(Structure):
+        """struct in wincon.h."""
+        _fields_ = [
+            ("dwSize", COORD),
+            ("dwCursorPosition", COORD),
+            ("wAttributes", wintypes.WORD),
+            ("srWindow", wintypes.SMALL_RECT),
+            ("dwMaximumWindowSize", COORD),
+        ]
+        def __str__(self):
+            return '(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)' % (
+                self.dwSize.Y, self.dwSize.X
+                , self.dwCursorPosition.Y, self.dwCursorPosition.X
+                , self.wAttributes
+                , self.srWindow.Top, self.srWindow.Left, self.srWindow.Bottom, self.srWindow.Right
+                , self.dwMaximumWindowSize.Y, self.dwMaximumWindowSize.X
+            )
+
+    _GetStdHandle = windll.kernel32.GetStdHandle
+    _GetStdHandle.argtypes = [
+        wintypes.DWORD,
+    ]
+    _GetStdHandle.restype = wintypes.HANDLE
+
+    _GetConsoleScreenBufferInfo = windll.kernel32.GetConsoleScreenBufferInfo
+    _GetConsoleScreenBufferInfo.argtypes = [
+        wintypes.HANDLE,
+        POINTER(CONSOLE_SCREEN_BUFFER_INFO),
+    ]
+    _GetConsoleScreenBufferInfo.restype = wintypes.BOOL
+
+    _SetConsoleTextAttribute = windll.kernel32.SetConsoleTextAttribute
+    _SetConsoleTextAttribute.argtypes = [
+        wintypes.HANDLE,
+        wintypes.WORD,
+    ]
+    _SetConsoleTextAttribute.restype = wintypes.BOOL
+
+    _SetConsoleCursorPosition = windll.kernel32.SetConsoleCursorPosition
+    _SetConsoleCursorPosition.argtypes = [
+        wintypes.HANDLE,
+        COORD,
+    ]
+    _SetConsoleCursorPosition.restype = wintypes.BOOL
+
+    _FillConsoleOutputCharacterA = windll.kernel32.FillConsoleOutputCharacterA
+    _FillConsoleOutputCharacterA.argtypes = [
+        wintypes.HANDLE,
+        c_char,
+        wintypes.DWORD,
+        COORD,
+        POINTER(wintypes.DWORD),
+    ]
+    _FillConsoleOutputCharacterA.restype = wintypes.BOOL
+
+    _FillConsoleOutputAttribute = windll.kernel32.FillConsoleOutputAttribute
+    _FillConsoleOutputAttribute.argtypes = [
+        wintypes.HANDLE,
+        wintypes.WORD,
+        wintypes.DWORD,
+        COORD,
+        POINTER(wintypes.DWORD),
+    ]
+    _FillConsoleOutputAttribute.restype = wintypes.BOOL
+
+    _SetConsoleTitleW = windll.kernel32.SetConsoleTitleW
+    _SetConsoleTitleW.argtypes = [
+        wintypes.LPCWSTR
+    ]
+    _SetConsoleTitleW.restype = wintypes.BOOL
+
+    def _winapi_test(handle):
+        csbi = CONSOLE_SCREEN_BUFFER_INFO()
+        success = _GetConsoleScreenBufferInfo(
+            handle, byref(csbi))
+        return bool(success)
+
+    def winapi_test():
+        return any(_winapi_test(h) for h in
+                   (_GetStdHandle(STDOUT), _GetStdHandle(STDERR)))
+
+    def GetConsoleScreenBufferInfo(stream_id=STDOUT):
+        handle = _GetStdHandle(stream_id)
+        csbi = CONSOLE_SCREEN_BUFFER_INFO()
+        success = _GetConsoleScreenBufferInfo(
+            handle, byref(csbi))
+        return csbi
+
+    def SetConsoleTextAttribute(stream_id, attrs):
+        handle = _GetStdHandle(stream_id)
+        return _SetConsoleTextAttribute(handle, attrs)
+
+    def SetConsoleCursorPosition(stream_id, position, adjust=True):
+        position = COORD(*position)
+        # If the position is out of range, do nothing.
+        if position.Y <= 0 or position.X <= 0:
+            return
+        # Adjust for Windows' SetConsoleCursorPosition:
+        #    1. being 0-based, while ANSI is 1-based.
+        #    2. expecting (x,y), while ANSI uses (y,x).
+        adjusted_position = COORD(position.Y - 1, position.X - 1)
+        if adjust:
+            # Adjust for viewport's scroll position
+            sr = GetConsoleScreenBufferInfo(STDOUT).srWindow
+            adjusted_position.Y += sr.Top
+            adjusted_position.X += sr.Left
+        # Resume normal processing
+        handle = _GetStdHandle(stream_id)
+        return _SetConsoleCursorPosition(handle, adjusted_position)
+
+    def FillConsoleOutputCharacter(stream_id, char, length, start):
+        handle = _GetStdHandle(stream_id)
+        char = c_char(char.encode())
+        length = wintypes.DWORD(length)
+        num_written = wintypes.DWORD(0)
+        # Note that this is hard-coded for ANSI (vs wide) bytes.
+        success = _FillConsoleOutputCharacterA(
+            handle, char, length, start, byref(num_written))
+        return num_written.value
+
+    def FillConsoleOutputAttribute(stream_id, attr, length, start):
+        ''' FillConsoleOutputAttribute( hConsole, csbi.wAttributes, dwConSize, coordScreen, &cCharsWritten )'''
+        handle = _GetStdHandle(stream_id)
+        attribute = wintypes.WORD(attr)
+        length = wintypes.DWORD(length)
+        num_written = wintypes.DWORD(0)
+        # Note that this is hard-coded for ANSI (vs wide) bytes.
+        return _FillConsoleOutputAttribute(
+            handle, attribute, length, start, byref(num_written))
+
+    def SetConsoleTitle(title):
+        return _SetConsoleTitleW(title)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/winterm.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/winterm.py
new file mode 100644
index 0000000..0fdb4ec
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/colorama/winterm.py
@@ -0,0 +1,169 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+from . import win32
+
+
+# from wincon.h
+class WinColor(object):
+    BLACK   = 0
+    BLUE    = 1
+    GREEN   = 2
+    CYAN    = 3
+    RED     = 4
+    MAGENTA = 5
+    YELLOW  = 6
+    GREY    = 7
+
+# from wincon.h
+class WinStyle(object):
+    NORMAL              = 0x00 # dim text, dim background
+    BRIGHT              = 0x08 # bright text, dim background
+    BRIGHT_BACKGROUND   = 0x80 # dim text, bright background
+
+class WinTerm(object):
+
+    def __init__(self):
+        self._default = win32.GetConsoleScreenBufferInfo(win32.STDOUT).wAttributes
+        self.set_attrs(self._default)
+        self._default_fore = self._fore
+        self._default_back = self._back
+        self._default_style = self._style
+        # In order to emulate LIGHT_EX in windows, we borrow the BRIGHT style.
+        # So that LIGHT_EX colors and BRIGHT style do not clobber each other,
+        # we track them separately, since LIGHT_EX is overwritten by Fore/Back
+        # and BRIGHT is overwritten by Style codes.
+        self._light = 0
+
+    def get_attrs(self):
+        return self._fore + self._back * 16 + (self._style | self._light)
+
+    def set_attrs(self, value):
+        self._fore = value & 7
+        self._back = (value >> 4) & 7
+        self._style = value & (WinStyle.BRIGHT | WinStyle.BRIGHT_BACKGROUND)
+
+    def reset_all(self, on_stderr=None):
+        self.set_attrs(self._default)
+        self.set_console(attrs=self._default)
+        self._light = 0
+
+    def fore(self, fore=None, light=False, on_stderr=False):
+        if fore is None:
+            fore = self._default_fore
+        self._fore = fore
+        # Emulate LIGHT_EX with BRIGHT Style
+        if light:
+            self._light |= WinStyle.BRIGHT
+        else:
+            self._light &= ~WinStyle.BRIGHT
+        self.set_console(on_stderr=on_stderr)
+
+    def back(self, back=None, light=False, on_stderr=False):
+        if back is None:
+            back = self._default_back
+        self._back = back
+        # Emulate LIGHT_EX with BRIGHT_BACKGROUND Style
+        if light:
+            self._light |= WinStyle.BRIGHT_BACKGROUND
+        else:
+            self._light &= ~WinStyle.BRIGHT_BACKGROUND
+        self.set_console(on_stderr=on_stderr)
+
+    def style(self, style=None, on_stderr=False):
+        if style is None:
+            style = self._default_style
+        self._style = style
+        self.set_console(on_stderr=on_stderr)
+
+    def set_console(self, attrs=None, on_stderr=False):
+        if attrs is None:
+            attrs = self.get_attrs()
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        win32.SetConsoleTextAttribute(handle, attrs)
+
+    def get_position(self, handle):
+        position = win32.GetConsoleScreenBufferInfo(handle).dwCursorPosition
+        # Because Windows coordinates are 0-based,
+        # and win32.SetConsoleCursorPosition expects 1-based.
+        position.X += 1
+        position.Y += 1
+        return position
+
+    def set_cursor_position(self, position=None, on_stderr=False):
+        if position is None:
+            # I'm not currently tracking the position, so there is no default.
+            # position = self.get_position()
+            return
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        win32.SetConsoleCursorPosition(handle, position)
+
+    def cursor_adjust(self, x, y, on_stderr=False):
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        position = self.get_position(handle)
+        adjusted_position = (position.Y + y, position.X + x)
+        win32.SetConsoleCursorPosition(handle, adjusted_position, adjust=False)
+
+    def erase_screen(self, mode=0, on_stderr=False):
+        # 0 should clear from the cursor to the end of the screen.
+        # 1 should clear from the cursor to the beginning of the screen.
+        # 2 should clear the entire screen, and move cursor to (1,1)
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        csbi = win32.GetConsoleScreenBufferInfo(handle)
+        # get the number of character cells in the current buffer
+        cells_in_screen = csbi.dwSize.X * csbi.dwSize.Y
+        # get number of character cells before current cursor position
+        cells_before_cursor = csbi.dwSize.X * csbi.dwCursorPosition.Y + csbi.dwCursorPosition.X
+        if mode == 0:
+            from_coord = csbi.dwCursorPosition
+            cells_to_erase = cells_in_screen - cells_before_cursor
+        elif mode == 1:
+            from_coord = win32.COORD(0, 0)
+            cells_to_erase = cells_before_cursor
+        elif mode == 2:
+            from_coord = win32.COORD(0, 0)
+            cells_to_erase = cells_in_screen
+        else:
+            # invalid mode
+            return
+        # fill the entire screen with blanks
+        win32.FillConsoleOutputCharacter(handle, ' ', cells_to_erase, from_coord)
+        # now set the buffer's attributes accordingly
+        win32.FillConsoleOutputAttribute(handle, self.get_attrs(), cells_to_erase, from_coord)
+        if mode == 2:
+            # put the cursor where needed
+            win32.SetConsoleCursorPosition(handle, (1, 1))
+
+    def erase_line(self, mode=0, on_stderr=False):
+        # 0 should clear from the cursor to the end of the line.
+        # 1 should clear from the cursor to the beginning of the line.
+        # 2 should clear the entire line.
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        csbi = win32.GetConsoleScreenBufferInfo(handle)
+        if mode == 0:
+            from_coord = csbi.dwCursorPosition
+            cells_to_erase = csbi.dwSize.X - csbi.dwCursorPosition.X
+        elif mode == 1:
+            from_coord = win32.COORD(0, csbi.dwCursorPosition.Y)
+            cells_to_erase = csbi.dwCursorPosition.X
+        elif mode == 2:
+            from_coord = win32.COORD(0, csbi.dwCursorPosition.Y)
+            cells_to_erase = csbi.dwSize.X
+        else:
+            # invalid mode
+            return
+        # fill the entire screen with blanks
+        win32.FillConsoleOutputCharacter(handle, ' ', cells_to_erase, from_coord)
+        # now set the buffer's attributes accordingly
+        win32.FillConsoleOutputAttribute(handle, self.get_attrs(), cells_to_erase, from_coord)
+
+    def set_title(self, title):
+        win32.SetConsoleTitle(title)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/contextlib2.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/contextlib2.py
new file mode 100644
index 0000000..3aae8f4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/contextlib2.py
@@ -0,0 +1,518 @@
+"""contextlib2 - backports and enhancements to the contextlib module"""
+
+import abc
+import sys
+import warnings
+from collections import deque
+from functools import wraps
+
+__all__ = ["contextmanager", "closing", "nullcontext",
+           "AbstractContextManager",
+           "ContextDecorator", "ExitStack",
+           "redirect_stdout", "redirect_stderr", "suppress"]
+
+# Backwards compatibility
+__all__ += ["ContextStack"]
+
+
+# Backport abc.ABC
+if sys.version_info[:2] >= (3, 4):
+    _abc_ABC = abc.ABC
+else:
+    _abc_ABC = abc.ABCMeta('ABC', (object,), {'__slots__': ()})
+
+
+# Backport classic class MRO
+def _classic_mro(C, result):
+    if C in result:
+        return
+    result.append(C)
+    for B in C.__bases__:
+        _classic_mro(B, result)
+    return result
+
+
+# Backport _collections_abc._check_methods
+def _check_methods(C, *methods):
+    try:
+        mro = C.__mro__
+    except AttributeError:
+        mro = tuple(_classic_mro(C, []))
+
+    for method in methods:
+        for B in mro:
+            if method in B.__dict__:
+                if B.__dict__[method] is None:
+                    return NotImplemented
+                break
+        else:
+            return NotImplemented
+    return True
+
+
+class AbstractContextManager(_abc_ABC):
+    """An abstract base class for context managers."""
+
+    def __enter__(self):
+        """Return `self` upon entering the runtime context."""
+        return self
+
+    @abc.abstractmethod
+    def __exit__(self, exc_type, exc_value, traceback):
+        """Raise any exception triggered within the runtime context."""
+        return None
+
+    @classmethod
+    def __subclasshook__(cls, C):
+        """Check whether subclass is considered a subclass of this ABC."""
+        if cls is AbstractContextManager:
+            return _check_methods(C, "__enter__", "__exit__")
+        return NotImplemented
+
+
+class ContextDecorator(object):
+    """A base class or mixin that enables context managers to work as decorators."""
+
+    def refresh_cm(self):
+        """Returns the context manager used to actually wrap the call to the
+        decorated function.
+
+        The default implementation just returns *self*.
+
+        Overriding this method allows otherwise one-shot context managers
+        like _GeneratorContextManager to support use as decorators via
+        implicit recreation.
+
+        DEPRECATED: refresh_cm was never added to the standard library's
+                    ContextDecorator API
+        """
+        warnings.warn("refresh_cm was never added to the standard library",
+                      DeprecationWarning)
+        return self._recreate_cm()
+
+    def _recreate_cm(self):
+        """Return a recreated instance of self.
+
+        Allows an otherwise one-shot context manager like
+        _GeneratorContextManager to support use as
+        a decorator via implicit recreation.
+
+        This is a private interface just for _GeneratorContextManager.
+        See issue #11647 for details.
+        """
+        return self
+
+    def __call__(self, func):
+        @wraps(func)
+        def inner(*args, **kwds):
+            with self._recreate_cm():
+                return func(*args, **kwds)
+        return inner
+
+
+class _GeneratorContextManager(ContextDecorator):
+    """Helper for @contextmanager decorator."""
+
+    def __init__(self, func, args, kwds):
+        self.gen = func(*args, **kwds)
+        self.func, self.args, self.kwds = func, args, kwds
+        # Issue 19330: ensure context manager instances have good docstrings
+        doc = getattr(func, "__doc__", None)
+        if doc is None:
+            doc = type(self).__doc__
+        self.__doc__ = doc
+        # Unfortunately, this still doesn't provide good help output when
+        # inspecting the created context manager instances, since pydoc
+        # currently bypasses the instance docstring and shows the docstring
+        # for the class instead.
+        # See http://bugs.python.org/issue19404 for more details.
+
+    def _recreate_cm(self):
+        # _GCM instances are one-shot context managers, so the
+        # CM must be recreated each time a decorated function is
+        # called
+        return self.__class__(self.func, self.args, self.kwds)
+
+    def __enter__(self):
+        try:
+            return next(self.gen)
+        except StopIteration:
+            raise RuntimeError("generator didn't yield")
+
+    def __exit__(self, type, value, traceback):
+        if type is None:
+            try:
+                next(self.gen)
+            except StopIteration:
+                return
+            else:
+                raise RuntimeError("generator didn't stop")
+        else:
+            if value is None:
+                # Need to force instantiation so we can reliably
+                # tell if we get the same exception back
+                value = type()
+            try:
+                self.gen.throw(type, value, traceback)
+                raise RuntimeError("generator didn't stop after throw()")
+            except StopIteration as exc:
+                # Suppress StopIteration *unless* it's the same exception that
+                # was passed to throw().  This prevents a StopIteration
+                # raised inside the "with" statement from being suppressed.
+                return exc is not value
+            except RuntimeError as exc:
+                # Don't re-raise the passed in exception
+                if exc is value:
+                    return False
+                # Likewise, avoid suppressing if a StopIteration exception
+                # was passed to throw() and later wrapped into a RuntimeError
+                # (see PEP 479).
+                if _HAVE_EXCEPTION_CHAINING and exc.__cause__ is value:
+                    return False
+                raise
+            except:
+                # only re-raise if it's *not* the exception that was
+                # passed to throw(), because __exit__() must not raise
+                # an exception unless __exit__() itself failed.  But throw()
+                # has to raise the exception to signal propagation, so this
+                # fixes the impedance mismatch between the throw() protocol
+                # and the __exit__() protocol.
+                #
+                if sys.exc_info()[1] is not value:
+                    raise
+
+
+def contextmanager(func):
+    """@contextmanager decorator.
+
+    Typical usage:
+
+        @contextmanager
+        def some_generator(<arguments>):
+            <setup>
+            try:
+                yield <value>
+            finally:
+                <cleanup>
+
+    This makes this:
+
+        with some_generator(<arguments>) as <variable>:
+            <body>
+
+    equivalent to this:
+
+        <setup>
+        try:
+            <variable> = <value>
+            <body>
+        finally:
+            <cleanup>
+
+    """
+    @wraps(func)
+    def helper(*args, **kwds):
+        return _GeneratorContextManager(func, args, kwds)
+    return helper
+
+
+class closing(object):
+    """Context to automatically close something at the end of a block.
+
+    Code like this:
+
+        with closing(<module>.open(<arguments>)) as f:
+            <block>
+
+    is equivalent to this:
+
+        f = <module>.open(<arguments>)
+        try:
+            <block>
+        finally:
+            f.close()
+
+    """
+    def __init__(self, thing):
+        self.thing = thing
+
+    def __enter__(self):
+        return self.thing
+
+    def __exit__(self, *exc_info):
+        self.thing.close()
+
+
+class _RedirectStream(object):
+
+    _stream = None
+
+    def __init__(self, new_target):
+        self._new_target = new_target
+        # We use a list of old targets to make this CM re-entrant
+        self._old_targets = []
+
+    def __enter__(self):
+        self._old_targets.append(getattr(sys, self._stream))
+        setattr(sys, self._stream, self._new_target)
+        return self._new_target
+
+    def __exit__(self, exctype, excinst, exctb):
+        setattr(sys, self._stream, self._old_targets.pop())
+
+
+class redirect_stdout(_RedirectStream):
+    """Context manager for temporarily redirecting stdout to another file.
+
+        # How to send help() to stderr
+        with redirect_stdout(sys.stderr):
+            help(dir)
+
+        # How to write help() to a file
+        with open('help.txt', 'w') as f:
+            with redirect_stdout(f):
+                help(pow)
+    """
+
+    _stream = "stdout"
+
+
+class redirect_stderr(_RedirectStream):
+    """Context manager for temporarily redirecting stderr to another file."""
+
+    _stream = "stderr"
+
+
+class suppress(object):
+    """Context manager to suppress specified exceptions
+
+    After the exception is suppressed, execution proceeds with the next
+    statement following the with statement.
+
+         with suppress(FileNotFoundError):
+             os.remove(somefile)
+         # Execution still resumes here if the file was already removed
+    """
+
+    def __init__(self, *exceptions):
+        self._exceptions = exceptions
+
+    def __enter__(self):
+        pass
+
+    def __exit__(self, exctype, excinst, exctb):
+        # Unlike isinstance and issubclass, CPython exception handling
+        # currently only looks at the concrete type hierarchy (ignoring
+        # the instance and subclass checking hooks). While Guido considers
+        # that a bug rather than a feature, it's a fairly hard one to fix
+        # due to various internal implementation details. suppress provides
+        # the simpler issubclass based semantics, rather than trying to
+        # exactly reproduce the limitations of the CPython interpreter.
+        #
+        # See http://bugs.python.org/issue12029 for more details
+        return exctype is not None and issubclass(exctype, self._exceptions)
+
+
+# Context manipulation is Python 3 only
+_HAVE_EXCEPTION_CHAINING = sys.version_info[0] >= 3
+if _HAVE_EXCEPTION_CHAINING:
+    def _make_context_fixer(frame_exc):
+        def _fix_exception_context(new_exc, old_exc):
+            # Context may not be correct, so find the end of the chain
+            while 1:
+                exc_context = new_exc.__context__
+                if exc_context is old_exc:
+                    # Context is already set correctly (see issue 20317)
+                    return
+                if exc_context is None or exc_context is frame_exc:
+                    break
+                new_exc = exc_context
+            # Change the end of the chain to point to the exception
+            # we expect it to reference
+            new_exc.__context__ = old_exc
+        return _fix_exception_context
+
+    def _reraise_with_existing_context(exc_details):
+        try:
+            # bare "raise exc_details[1]" replaces our carefully
+            # set-up context
+            fixed_ctx = exc_details[1].__context__
+            raise exc_details[1]
+        except BaseException:
+            exc_details[1].__context__ = fixed_ctx
+            raise
+else:
+    # No exception context in Python 2
+    def _make_context_fixer(frame_exc):
+        return lambda new_exc, old_exc: None
+
+    # Use 3 argument raise in Python 2,
+    # but use exec to avoid SyntaxError in Python 3
+    def _reraise_with_existing_context(exc_details):
+        exc_type, exc_value, exc_tb = exc_details
+        exec("raise exc_type, exc_value, exc_tb")
+
+# Handle old-style classes if they exist
+try:
+    from types import InstanceType
+except ImportError:
+    # Python 3 doesn't have old-style classes
+    _get_type = type
+else:
+    # Need to handle old-style context managers on Python 2
+    def _get_type(obj):
+        obj_type = type(obj)
+        if obj_type is InstanceType:
+            return obj.__class__  # Old-style class
+        return obj_type  # New-style class
+
+
+# Inspired by discussions on http://bugs.python.org/issue13585
+class ExitStack(object):
+    """Context manager for dynamic management of a stack of exit callbacks
+
+    For example:
+
+        with ExitStack() as stack:
+            files = [stack.enter_context(open(fname)) for fname in filenames]
+            # All opened files will automatically be closed at the end of
+            # the with statement, even if attempts to open files later
+            # in the list raise an exception
+
+    """
+    def __init__(self):
+        self._exit_callbacks = deque()
+
+    def pop_all(self):
+        """Preserve the context stack by transferring it to a new instance"""
+        new_stack = type(self)()
+        new_stack._exit_callbacks = self._exit_callbacks
+        self._exit_callbacks = deque()
+        return new_stack
+
+    def _push_cm_exit(self, cm, cm_exit):
+        """Helper to correctly register callbacks to __exit__ methods"""
+        def _exit_wrapper(*exc_details):
+            return cm_exit(cm, *exc_details)
+        _exit_wrapper.__self__ = cm
+        self.push(_exit_wrapper)
+
+    def push(self, exit):
+        """Registers a callback with the standard __exit__ method signature
+
+        Can suppress exceptions the same way __exit__ methods can.
+
+        Also accepts any object with an __exit__ method (registering a call
+        to the method instead of the object itself)
+        """
+        # We use an unbound method rather than a bound method to follow
+        # the standard lookup behaviour for special methods
+        _cb_type = _get_type(exit)
+        try:
+            exit_method = _cb_type.__exit__
+        except AttributeError:
+            # Not a context manager, so assume its a callable
+            self._exit_callbacks.append(exit)
+        else:
+            self._push_cm_exit(exit, exit_method)
+        return exit # Allow use as a decorator
+
+    def callback(self, callback, *args, **kwds):
+        """Registers an arbitrary callback and arguments.
+
+        Cannot suppress exceptions.
+        """
+        def _exit_wrapper(exc_type, exc, tb):
+            callback(*args, **kwds)
+        # We changed the signature, so using @wraps is not appropriate, but
+        # setting __wrapped__ may still help with introspection
+        _exit_wrapper.__wrapped__ = callback
+        self.push(_exit_wrapper)
+        return callback # Allow use as a decorator
+
+    def enter_context(self, cm):
+        """Enters the supplied context manager
+
+        If successful, also pushes its __exit__ method as a callback and
+        returns the result of the __enter__ method.
+        """
+        # We look up the special methods on the type to match the with statement
+        _cm_type = _get_type(cm)
+        _exit = _cm_type.__exit__
+        result = _cm_type.__enter__(cm)
+        self._push_cm_exit(cm, _exit)
+        return result
+
+    def close(self):
+        """Immediately unwind the context stack"""
+        self.__exit__(None, None, None)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *exc_details):
+        received_exc = exc_details[0] is not None
+
+        # We manipulate the exception state so it behaves as though
+        # we were actually nesting multiple with statements
+        frame_exc = sys.exc_info()[1]
+        _fix_exception_context = _make_context_fixer(frame_exc)
+
+        # Callbacks are invoked in LIFO order to match the behaviour of
+        # nested context managers
+        suppressed_exc = False
+        pending_raise = False
+        while self._exit_callbacks:
+            cb = self._exit_callbacks.pop()
+            try:
+                if cb(*exc_details):
+                    suppressed_exc = True
+                    pending_raise = False
+                    exc_details = (None, None, None)
+            except:
+                new_exc_details = sys.exc_info()
+                # simulate the stack of exceptions by setting the context
+                _fix_exception_context(new_exc_details[1], exc_details[1])
+                pending_raise = True
+                exc_details = new_exc_details
+        if pending_raise:
+            _reraise_with_existing_context(exc_details)
+        return received_exc and suppressed_exc
+
+
+# Preserve backwards compatibility
+class ContextStack(ExitStack):
+    """Backwards compatibility alias for ExitStack"""
+
+    def __init__(self):
+        warnings.warn("ContextStack has been renamed to ExitStack",
+                      DeprecationWarning)
+        super(ContextStack, self).__init__()
+
+    def register_exit(self, callback):
+        return self.push(callback)
+
+    def register(self, callback, *args, **kwds):
+        return self.callback(callback, *args, **kwds)
+
+    def preserve(self):
+        return self.pop_all()
+
+
+class nullcontext(AbstractContextManager):
+    """Context manager that does no additional processing.
+    Used as a stand-in for a normal context manager, when a particular
+    block of code is only sometimes used with a normal context manager:
+    cm = optional_cm if condition else nullcontext()
+    with cm:
+        # Perform operation, using optional_cm if condition is True
+    """
+
+    def __init__(self, enter_result=None):
+        self.enter_result = enter_result
+
+    def __enter__(self):
+        return self.enter_result
+
+    def __exit__(self, *excinfo):
+        pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/__init__.py
new file mode 100644
index 0000000..63d916e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/__init__.py
@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2019 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+import logging
+
+__version__ = '0.3.1'
+
+class DistlibException(Exception):
+    pass
+
+try:
+    from logging import NullHandler
+except ImportError: # pragma: no cover
+    class NullHandler(logging.Handler):
+        def handle(self, record): pass
+        def emit(self, record): pass
+        def createLock(self): self.lock = None
+
+logger = logging.getLogger(__name__)
+logger.addHandler(NullHandler())
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/__init__.py
new file mode 100644
index 0000000..f7dbf4c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/__init__.py
@@ -0,0 +1,6 @@
+"""Modules copied from Python 3 standard libraries, for internal use only.
+
+Individual classes and functions are found in d2._backport.misc.  Intended
+usage is to always import things missing from 3.1 from that module: the
+built-in/stdlib objects will be used if found.
+"""
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/misc.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/misc.py
new file mode 100644
index 0000000..cfb318d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/misc.py
@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""Backports for individual classes and functions."""
+
+import os
+import sys
+
+__all__ = ['cache_from_source', 'callable', 'fsencode']
+
+
+try:
+    from imp import cache_from_source
+except ImportError:
+    def cache_from_source(py_file, debug=__debug__):
+        ext = debug and 'c' or 'o'
+        return py_file + ext
+
+
+try:
+    callable = callable
+except NameError:
+    from collections import Callable
+
+    def callable(obj):
+        return isinstance(obj, Callable)
+
+
+try:
+    fsencode = os.fsencode
+except AttributeError:
+    def fsencode(filename):
+        if isinstance(filename, bytes):
+            return filename
+        elif isinstance(filename, str):
+            return filename.encode(sys.getfilesystemencoding())
+        else:
+            raise TypeError("expect bytes or str, not %s" %
+                            type(filename).__name__)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/shutil.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/shutil.py
new file mode 100644
index 0000000..10ed362
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/shutil.py
@@ -0,0 +1,764 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""Utility functions for copying and archiving files and directory trees.
+
+XXX The functions here don't copy the resource fork or other metadata on Mac.
+
+"""
+
+import os
+import sys
+import stat
+from os.path import abspath
+import fnmatch
+try:
+    from collections.abc import Callable
+except ImportError:
+    from collections import Callable
+import errno
+from . import tarfile
+
+try:
+    import bz2
+    _BZ2_SUPPORTED = True
+except ImportError:
+    _BZ2_SUPPORTED = False
+
+try:
+    from pwd import getpwnam
+except ImportError:
+    getpwnam = None
+
+try:
+    from grp import getgrnam
+except ImportError:
+    getgrnam = None
+
+__all__ = ["copyfileobj", "copyfile", "copymode", "copystat", "copy", "copy2",
+           "copytree", "move", "rmtree", "Error", "SpecialFileError",
+           "ExecError", "make_archive", "get_archive_formats",
+           "register_archive_format", "unregister_archive_format",
+           "get_unpack_formats", "register_unpack_format",
+           "unregister_unpack_format", "unpack_archive", "ignore_patterns"]
+
+class Error(EnvironmentError):
+    pass
+
+class SpecialFileError(EnvironmentError):
+    """Raised when trying to do a kind of operation (e.g. copying) which is
+    not supported on a special file (e.g. a named pipe)"""
+
+class ExecError(EnvironmentError):
+    """Raised when a command could not be executed"""
+
+class ReadError(EnvironmentError):
+    """Raised when an archive cannot be read"""
+
+class RegistryError(Exception):
+    """Raised when a registry operation with the archiving
+    and unpacking registries fails"""
+
+
+try:
+    WindowsError
+except NameError:
+    WindowsError = None
+
+def copyfileobj(fsrc, fdst, length=16*1024):
+    """copy data from file-like object fsrc to file-like object fdst"""
+    while 1:
+        buf = fsrc.read(length)
+        if not buf:
+            break
+        fdst.write(buf)
+
+def _samefile(src, dst):
+    # Macintosh, Unix.
+    if hasattr(os.path, 'samefile'):
+        try:
+            return os.path.samefile(src, dst)
+        except OSError:
+            return False
+
+    # All other platforms: check for same pathname.
+    return (os.path.normcase(os.path.abspath(src)) ==
+            os.path.normcase(os.path.abspath(dst)))
+
+def copyfile(src, dst):
+    """Copy data from src to dst"""
+    if _samefile(src, dst):
+        raise Error("`%s` and `%s` are the same file" % (src, dst))
+
+    for fn in [src, dst]:
+        try:
+            st = os.stat(fn)
+        except OSError:
+            # File most likely does not exist
+            pass
+        else:
+            # XXX What about other special files? (sockets, devices...)
+            if stat.S_ISFIFO(st.st_mode):
+                raise SpecialFileError("`%s` is a named pipe" % fn)
+
+    with open(src, 'rb') as fsrc:
+        with open(dst, 'wb') as fdst:
+            copyfileobj(fsrc, fdst)
+
+def copymode(src, dst):
+    """Copy mode bits from src to dst"""
+    if hasattr(os, 'chmod'):
+        st = os.stat(src)
+        mode = stat.S_IMODE(st.st_mode)
+        os.chmod(dst, mode)
+
+def copystat(src, dst):
+    """Copy all stat info (mode bits, atime, mtime, flags) from src to dst"""
+    st = os.stat(src)
+    mode = stat.S_IMODE(st.st_mode)
+    if hasattr(os, 'utime'):
+        os.utime(dst, (st.st_atime, st.st_mtime))
+    if hasattr(os, 'chmod'):
+        os.chmod(dst, mode)
+    if hasattr(os, 'chflags') and hasattr(st, 'st_flags'):
+        try:
+            os.chflags(dst, st.st_flags)
+        except OSError as why:
+            if (not hasattr(errno, 'EOPNOTSUPP') or
+                why.errno != errno.EOPNOTSUPP):
+                raise
+
+def copy(src, dst):
+    """Copy data and mode bits ("cp src dst").
+
+    The destination may be a directory.
+
+    """
+    if os.path.isdir(dst):
+        dst = os.path.join(dst, os.path.basename(src))
+    copyfile(src, dst)
+    copymode(src, dst)
+
+def copy2(src, dst):
+    """Copy data and all stat info ("cp -p src dst").
+
+    The destination may be a directory.
+
+    """
+    if os.path.isdir(dst):
+        dst = os.path.join(dst, os.path.basename(src))
+    copyfile(src, dst)
+    copystat(src, dst)
+
+def ignore_patterns(*patterns):
+    """Function that can be used as copytree() ignore parameter.
+
+    Patterns is a sequence of glob-style patterns
+    that are used to exclude files"""
+    def _ignore_patterns(path, names):
+        ignored_names = []
+        for pattern in patterns:
+            ignored_names.extend(fnmatch.filter(names, pattern))
+        return set(ignored_names)
+    return _ignore_patterns
+
+def copytree(src, dst, symlinks=False, ignore=None, copy_function=copy2,
+             ignore_dangling_symlinks=False):
+    """Recursively copy a directory tree.
+
+    The destination directory must not already exist.
+    If exception(s) occur, an Error is raised with a list of reasons.
+
+    If the optional symlinks flag is true, symbolic links in the
+    source tree result in symbolic links in the destination tree; if
+    it is false, the contents of the files pointed to by symbolic
+    links are copied. If the file pointed by the symlink doesn't
+    exist, an exception will be added in the list of errors raised in
+    an Error exception at the end of the copy process.
+
+    You can set the optional ignore_dangling_symlinks flag to true if you
+    want to silence this exception. Notice that this has no effect on
+    platforms that don't support os.symlink.
+
+    The optional ignore argument is a callable. If given, it
+    is called with the `src` parameter, which is the directory
+    being visited by copytree(), and `names` which is the list of
+    `src` contents, as returned by os.listdir():
+
+        callable(src, names) -> ignored_names
+
+    Since copytree() is called recursively, the callable will be
+    called once for each directory that is copied. It returns a
+    list of names relative to the `src` directory that should
+    not be copied.
+
+    The optional copy_function argument is a callable that will be used
+    to copy each file. It will be called with the source path and the
+    destination path as arguments. By default, copy2() is used, but any
+    function that supports the same signature (like copy()) can be used.
+
+    """
+    names = os.listdir(src)
+    if ignore is not None:
+        ignored_names = ignore(src, names)
+    else:
+        ignored_names = set()
+
+    os.makedirs(dst)
+    errors = []
+    for name in names:
+        if name in ignored_names:
+            continue
+        srcname = os.path.join(src, name)
+        dstname = os.path.join(dst, name)
+        try:
+            if os.path.islink(srcname):
+                linkto = os.readlink(srcname)
+                if symlinks:
+                    os.symlink(linkto, dstname)
+                else:
+                    # ignore dangling symlink if the flag is on
+                    if not os.path.exists(linkto) and ignore_dangling_symlinks:
+                        continue
+                    # otherwise let the copy occurs. copy2 will raise an error
+                    copy_function(srcname, dstname)
+            elif os.path.isdir(srcname):
+                copytree(srcname, dstname, symlinks, ignore, copy_function)
+            else:
+                # Will raise a SpecialFileError for unsupported file types
+                copy_function(srcname, dstname)
+        # catch the Error from the recursive copytree so that we can
+        # continue with other files
+        except Error as err:
+            errors.extend(err.args[0])
+        except EnvironmentError as why:
+            errors.append((srcname, dstname, str(why)))
+    try:
+        copystat(src, dst)
+    except OSError as why:
+        if WindowsError is not None and isinstance(why, WindowsError):
+            # Copying file access times may fail on Windows
+            pass
+        else:
+            errors.extend((src, dst, str(why)))
+    if errors:
+        raise Error(errors)
+
+def rmtree(path, ignore_errors=False, onerror=None):
+    """Recursively delete a directory tree.
+
+    If ignore_errors is set, errors are ignored; otherwise, if onerror
+    is set, it is called to handle the error with arguments (func,
+    path, exc_info) where func is os.listdir, os.remove, or os.rmdir;
+    path is the argument to that function that caused it to fail; and
+    exc_info is a tuple returned by sys.exc_info().  If ignore_errors
+    is false and onerror is None, an exception is raised.
+
+    """
+    if ignore_errors:
+        def onerror(*args):
+            pass
+    elif onerror is None:
+        def onerror(*args):
+            raise
+    try:
+        if os.path.islink(path):
+            # symlinks to directories are forbidden, see bug #1669
+            raise OSError("Cannot call rmtree on a symbolic link")
+    except OSError:
+        onerror(os.path.islink, path, sys.exc_info())
+        # can't continue even if onerror hook returns
+        return
+    names = []
+    try:
+        names = os.listdir(path)
+    except os.error:
+        onerror(os.listdir, path, sys.exc_info())
+    for name in names:
+        fullname = os.path.join(path, name)
+        try:
+            mode = os.lstat(fullname).st_mode
+        except os.error:
+            mode = 0
+        if stat.S_ISDIR(mode):
+            rmtree(fullname, ignore_errors, onerror)
+        else:
+            try:
+                os.remove(fullname)
+            except os.error:
+                onerror(os.remove, fullname, sys.exc_info())
+    try:
+        os.rmdir(path)
+    except os.error:
+        onerror(os.rmdir, path, sys.exc_info())
+
+
+def _basename(path):
+    # A basename() variant which first strips the trailing slash, if present.
+    # Thus we always get the last component of the path, even for directories.
+    return os.path.basename(path.rstrip(os.path.sep))
+
+def move(src, dst):
+    """Recursively move a file or directory to another location. This is
+    similar to the Unix "mv" command.
+
+    If the destination is a directory or a symlink to a directory, the source
+    is moved inside the directory. The destination path must not already
+    exist.
+
+    If the destination already exists but is not a directory, it may be
+    overwritten depending on os.rename() semantics.
+
+    If the destination is on our current filesystem, then rename() is used.
+    Otherwise, src is copied to the destination and then removed.
+    A lot more could be done here...  A look at a mv.c shows a lot of
+    the issues this implementation glosses over.
+
+    """
+    real_dst = dst
+    if os.path.isdir(dst):
+        if _samefile(src, dst):
+            # We might be on a case insensitive filesystem,
+            # perform the rename anyway.
+            os.rename(src, dst)
+            return
+
+        real_dst = os.path.join(dst, _basename(src))
+        if os.path.exists(real_dst):
+            raise Error("Destination path '%s' already exists" % real_dst)
+    try:
+        os.rename(src, real_dst)
+    except OSError:
+        if os.path.isdir(src):
+            if _destinsrc(src, dst):
+                raise Error("Cannot move a directory '%s' into itself '%s'." % (src, dst))
+            copytree(src, real_dst, symlinks=True)
+            rmtree(src)
+        else:
+            copy2(src, real_dst)
+            os.unlink(src)
+
+def _destinsrc(src, dst):
+    src = abspath(src)
+    dst = abspath(dst)
+    if not src.endswith(os.path.sep):
+        src += os.path.sep
+    if not dst.endswith(os.path.sep):
+        dst += os.path.sep
+    return dst.startswith(src)
+
+def _get_gid(name):
+    """Returns a gid, given a group name."""
+    if getgrnam is None or name is None:
+        return None
+    try:
+        result = getgrnam(name)
+    except KeyError:
+        result = None
+    if result is not None:
+        return result[2]
+    return None
+
+def _get_uid(name):
+    """Returns an uid, given a user name."""
+    if getpwnam is None or name is None:
+        return None
+    try:
+        result = getpwnam(name)
+    except KeyError:
+        result = None
+    if result is not None:
+        return result[2]
+    return None
+
+def _make_tarball(base_name, base_dir, compress="gzip", verbose=0, dry_run=0,
+                  owner=None, group=None, logger=None):
+    """Create a (possibly compressed) tar file from all the files under
+    'base_dir'.
+
+    'compress' must be "gzip" (the default), "bzip2", or None.
+
+    'owner' and 'group' can be used to define an owner and a group for the
+    archive that is being built. If not provided, the current owner and group
+    will be used.
+
+    The output tar file will be named 'base_name' +  ".tar", possibly plus
+    the appropriate compression extension (".gz", or ".bz2").
+
+    Returns the output filename.
+    """
+    tar_compression = {'gzip': 'gz', None: ''}
+    compress_ext = {'gzip': '.gz'}
+
+    if _BZ2_SUPPORTED:
+        tar_compression['bzip2'] = 'bz2'
+        compress_ext['bzip2'] = '.bz2'
+
+    # flags for compression program, each element of list will be an argument
+    if compress is not None and compress not in compress_ext:
+        raise ValueError("bad value for 'compress', or compression format not "
+                         "supported : {0}".format(compress))
+
+    archive_name = base_name + '.tar' + compress_ext.get(compress, '')
+    archive_dir = os.path.dirname(archive_name)
+
+    if not os.path.exists(archive_dir):
+        if logger is not None:
+            logger.info("creating %s", archive_dir)
+        if not dry_run:
+            os.makedirs(archive_dir)
+
+    # creating the tarball
+    if logger is not None:
+        logger.info('Creating tar archive')
+
+    uid = _get_uid(owner)
+    gid = _get_gid(group)
+
+    def _set_uid_gid(tarinfo):
+        if gid is not None:
+            tarinfo.gid = gid
+            tarinfo.gname = group
+        if uid is not None:
+            tarinfo.uid = uid
+            tarinfo.uname = owner
+        return tarinfo
+
+    if not dry_run:
+        tar = tarfile.open(archive_name, 'w|%s' % tar_compression[compress])
+        try:
+            tar.add(base_dir, filter=_set_uid_gid)
+        finally:
+            tar.close()
+
+    return archive_name
+
+def _call_external_zip(base_dir, zip_filename, verbose=False, dry_run=False):
+    # XXX see if we want to keep an external call here
+    if verbose:
+        zipoptions = "-r"
+    else:
+        zipoptions = "-rq"
+    from distutils.errors import DistutilsExecError
+    from distutils.spawn import spawn
+    try:
+        spawn(["zip", zipoptions, zip_filename, base_dir], dry_run=dry_run)
+    except DistutilsExecError:
+        # XXX really should distinguish between "couldn't find
+        # external 'zip' command" and "zip failed".
+        raise ExecError("unable to create zip file '%s': "
+            "could neither import the 'zipfile' module nor "
+            "find a standalone zip utility") % zip_filename
+
+def _make_zipfile(base_name, base_dir, verbose=0, dry_run=0, logger=None):
+    """Create a zip file from all the files under 'base_dir'.
+
+    The output zip file will be named 'base_name' + ".zip".  Uses either the
+    "zipfile" Python module (if available) or the InfoZIP "zip" utility
+    (if installed and found on the default search path).  If neither tool is
+    available, raises ExecError.  Returns the name of the output zip
+    file.
+    """
+    zip_filename = base_name + ".zip"
+    archive_dir = os.path.dirname(base_name)
+
+    if not os.path.exists(archive_dir):
+        if logger is not None:
+            logger.info("creating %s", archive_dir)
+        if not dry_run:
+            os.makedirs(archive_dir)
+
+    # If zipfile module is not available, try spawning an external 'zip'
+    # command.
+    try:
+        import zipfile
+    except ImportError:
+        zipfile = None
+
+    if zipfile is None:
+        _call_external_zip(base_dir, zip_filename, verbose, dry_run)
+    else:
+        if logger is not None:
+            logger.info("creating '%s' and adding '%s' to it",
+                        zip_filename, base_dir)
+
+        if not dry_run:
+            zip = zipfile.ZipFile(zip_filename, "w",
+                                  compression=zipfile.ZIP_DEFLATED)
+
+            for dirpath, dirnames, filenames in os.walk(base_dir):
+                for name in filenames:
+                    path = os.path.normpath(os.path.join(dirpath, name))
+                    if os.path.isfile(path):
+                        zip.write(path, path)
+                        if logger is not None:
+                            logger.info("adding '%s'", path)
+            zip.close()
+
+    return zip_filename
+
+_ARCHIVE_FORMATS = {
+    'gztar': (_make_tarball, [('compress', 'gzip')], "gzip'ed tar-file"),
+    'bztar': (_make_tarball, [('compress', 'bzip2')], "bzip2'ed tar-file"),
+    'tar':   (_make_tarball, [('compress', None)], "uncompressed tar file"),
+    'zip':   (_make_zipfile, [], "ZIP file"),
+    }
+
+if _BZ2_SUPPORTED:
+    _ARCHIVE_FORMATS['bztar'] = (_make_tarball, [('compress', 'bzip2')],
+                                "bzip2'ed tar-file")
+
+def get_archive_formats():
+    """Returns a list of supported formats for archiving and unarchiving.
+
+    Each element of the returned sequence is a tuple (name, description)
+    """
+    formats = [(name, registry[2]) for name, registry in
+               _ARCHIVE_FORMATS.items()]
+    formats.sort()
+    return formats
+
+def register_archive_format(name, function, extra_args=None, description=''):
+    """Registers an archive format.
+
+    name is the name of the format. function is the callable that will be
+    used to create archives. If provided, extra_args is a sequence of
+    (name, value) tuples that will be passed as arguments to the callable.
+    description can be provided to describe the format, and will be returned
+    by the get_archive_formats() function.
+    """
+    if extra_args is None:
+        extra_args = []
+    if not isinstance(function, Callable):
+        raise TypeError('The %s object is not callable' % function)
+    if not isinstance(extra_args, (tuple, list)):
+        raise TypeError('extra_args needs to be a sequence')
+    for element in extra_args:
+        if not isinstance(element, (tuple, list)) or len(element) !=2:
+            raise TypeError('extra_args elements are : (arg_name, value)')
+
+    _ARCHIVE_FORMATS[name] = (function, extra_args, description)
+
+def unregister_archive_format(name):
+    del _ARCHIVE_FORMATS[name]
+
+def make_archive(base_name, format, root_dir=None, base_dir=None, verbose=0,
+                 dry_run=0, owner=None, group=None, logger=None):
+    """Create an archive file (eg. zip or tar).
+
+    'base_name' is the name of the file to create, minus any format-specific
+    extension; 'format' is the archive format: one of "zip", "tar", "bztar"
+    or "gztar".
+
+    'root_dir' is a directory that will be the root directory of the
+    archive; ie. we typically chdir into 'root_dir' before creating the
+    archive.  'base_dir' is the directory where we start archiving from;
+    ie. 'base_dir' will be the common prefix of all files and
+    directories in the archive.  'root_dir' and 'base_dir' both default
+    to the current directory.  Returns the name of the archive file.
+
+    'owner' and 'group' are used when creating a tar archive. By default,
+    uses the current owner and group.
+    """
+    save_cwd = os.getcwd()
+    if root_dir is not None:
+        if logger is not None:
+            logger.debug("changing into '%s'", root_dir)
+        base_name = os.path.abspath(base_name)
+        if not dry_run:
+            os.chdir(root_dir)
+
+    if base_dir is None:
+        base_dir = os.curdir
+
+    kwargs = {'dry_run': dry_run, 'logger': logger}
+
+    try:
+        format_info = _ARCHIVE_FORMATS[format]
+    except KeyError:
+        raise ValueError("unknown archive format '%s'" % format)
+
+    func = format_info[0]
+    for arg, val in format_info[1]:
+        kwargs[arg] = val
+
+    if format != 'zip':
+        kwargs['owner'] = owner
+        kwargs['group'] = group
+
+    try:
+        filename = func(base_name, base_dir, **kwargs)
+    finally:
+        if root_dir is not None:
+            if logger is not None:
+                logger.debug("changing back to '%s'", save_cwd)
+            os.chdir(save_cwd)
+
+    return filename
+
+
+def get_unpack_formats():
+    """Returns a list of supported formats for unpacking.
+
+    Each element of the returned sequence is a tuple
+    (name, extensions, description)
+    """
+    formats = [(name, info[0], info[3]) for name, info in
+               _UNPACK_FORMATS.items()]
+    formats.sort()
+    return formats
+
+def _check_unpack_options(extensions, function, extra_args):
+    """Checks what gets registered as an unpacker."""
+    # first make sure no other unpacker is registered for this extension
+    existing_extensions = {}
+    for name, info in _UNPACK_FORMATS.items():
+        for ext in info[0]:
+            existing_extensions[ext] = name
+
+    for extension in extensions:
+        if extension in existing_extensions:
+            msg = '%s is already registered for "%s"'
+            raise RegistryError(msg % (extension,
+                                       existing_extensions[extension]))
+
+    if not isinstance(function, Callable):
+        raise TypeError('The registered function must be a callable')
+
+
+def register_unpack_format(name, extensions, function, extra_args=None,
+                           description=''):
+    """Registers an unpack format.
+
+    `name` is the name of the format. `extensions` is a list of extensions
+    corresponding to the format.
+
+    `function` is the callable that will be
+    used to unpack archives. The callable will receive archives to unpack.
+    If it's unable to handle an archive, it needs to raise a ReadError
+    exception.
+
+    If provided, `extra_args` is a sequence of
+    (name, value) tuples that will be passed as arguments to the callable.
+    description can be provided to describe the format, and will be returned
+    by the get_unpack_formats() function.
+    """
+    if extra_args is None:
+        extra_args = []
+    _check_unpack_options(extensions, function, extra_args)
+    _UNPACK_FORMATS[name] = extensions, function, extra_args, description
+
+def unregister_unpack_format(name):
+    """Removes the pack format from the registry."""
+    del _UNPACK_FORMATS[name]
+
+def _ensure_directory(path):
+    """Ensure that the parent directory of `path` exists"""
+    dirname = os.path.dirname(path)
+    if not os.path.isdir(dirname):
+        os.makedirs(dirname)
+
+def _unpack_zipfile(filename, extract_dir):
+    """Unpack zip `filename` to `extract_dir`
+    """
+    try:
+        import zipfile
+    except ImportError:
+        raise ReadError('zlib not supported, cannot unpack this archive.')
+
+    if not zipfile.is_zipfile(filename):
+        raise ReadError("%s is not a zip file" % filename)
+
+    zip = zipfile.ZipFile(filename)
+    try:
+        for info in zip.infolist():
+            name = info.filename
+
+            # don't extract absolute paths or ones with .. in them
+            if name.startswith('/') or '..' in name:
+                continue
+
+            target = os.path.join(extract_dir, *name.split('/'))
+            if not target:
+                continue
+
+            _ensure_directory(target)
+            if not name.endswith('/'):
+                # file
+                data = zip.read(info.filename)
+                f = open(target, 'wb')
+                try:
+                    f.write(data)
+                finally:
+                    f.close()
+                    del data
+    finally:
+        zip.close()
+
+def _unpack_tarfile(filename, extract_dir):
+    """Unpack tar/tar.gz/tar.bz2 `filename` to `extract_dir`
+    """
+    try:
+        tarobj = tarfile.open(filename)
+    except tarfile.TarError:
+        raise ReadError(
+            "%s is not a compressed or uncompressed tar file" % filename)
+    try:
+        tarobj.extractall(extract_dir)
+    finally:
+        tarobj.close()
+
+_UNPACK_FORMATS = {
+    'gztar': (['.tar.gz', '.tgz'], _unpack_tarfile, [], "gzip'ed tar-file"),
+    'tar':   (['.tar'], _unpack_tarfile, [], "uncompressed tar file"),
+    'zip':   (['.zip'], _unpack_zipfile, [], "ZIP file")
+    }
+
+if _BZ2_SUPPORTED:
+    _UNPACK_FORMATS['bztar'] = (['.bz2'], _unpack_tarfile, [],
+                                "bzip2'ed tar-file")
+
+def _find_unpack_format(filename):
+    for name, info in _UNPACK_FORMATS.items():
+        for extension in info[0]:
+            if filename.endswith(extension):
+                return name
+    return None
+
+def unpack_archive(filename, extract_dir=None, format=None):
+    """Unpack an archive.
+
+    `filename` is the name of the archive.
+
+    `extract_dir` is the name of the target directory, where the archive
+    is unpacked. If not provided, the current working directory is used.
+
+    `format` is the archive format: one of "zip", "tar", or "gztar". Or any
+    other registered format. If not provided, unpack_archive will use the
+    filename extension and see if an unpacker was registered for that
+    extension.
+
+    In case none is found, a ValueError is raised.
+    """
+    if extract_dir is None:
+        extract_dir = os.getcwd()
+
+    if format is not None:
+        try:
+            format_info = _UNPACK_FORMATS[format]
+        except KeyError:
+            raise ValueError("Unknown unpack format '{0}'".format(format))
+
+        func = format_info[1]
+        func(filename, extract_dir, **dict(format_info[2]))
+    else:
+        # we need to look at the registered unpackers supported extensions
+        format = _find_unpack_format(filename)
+        if format is None:
+            raise ReadError("Unknown archive format '{0}'".format(filename))
+
+        func = _UNPACK_FORMATS[format][1]
+        kwargs = dict(_UNPACK_FORMATS[format][2])
+        func(filename, extract_dir, **kwargs)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/sysconfig.cfg b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/sysconfig.cfg
new file mode 100644
index 0000000..1746bd0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/sysconfig.cfg
@@ -0,0 +1,84 @@
+[posix_prefix]
+# Configuration directories.  Some of these come straight out of the
+# configure script.  They are for implementing the other variables, not to
+# be used directly in [resource_locations].
+confdir = /etc
+datadir = /usr/share
+libdir = /usr/lib
+statedir = /var
+# User resource directory
+local = ~/.local/{distribution.name}
+
+stdlib = {base}/lib/python{py_version_short}
+platstdlib = {platbase}/lib/python{py_version_short}
+purelib = {base}/lib/python{py_version_short}/site-packages
+platlib = {platbase}/lib/python{py_version_short}/site-packages
+include = {base}/include/python{py_version_short}{abiflags}
+platinclude = {platbase}/include/python{py_version_short}{abiflags}
+data = {base}
+
+[posix_home]
+stdlib = {base}/lib/python
+platstdlib = {base}/lib/python
+purelib = {base}/lib/python
+platlib = {base}/lib/python
+include = {base}/include/python
+platinclude = {base}/include/python
+scripts = {base}/bin
+data = {base}
+
+[nt]
+stdlib = {base}/Lib
+platstdlib = {base}/Lib
+purelib = {base}/Lib/site-packages
+platlib = {base}/Lib/site-packages
+include = {base}/Include
+platinclude = {base}/Include
+scripts = {base}/Scripts
+data = {base}
+
+[os2]
+stdlib = {base}/Lib
+platstdlib = {base}/Lib
+purelib = {base}/Lib/site-packages
+platlib = {base}/Lib/site-packages
+include = {base}/Include
+platinclude = {base}/Include
+scripts = {base}/Scripts
+data = {base}
+
+[os2_home]
+stdlib = {userbase}/lib/python{py_version_short}
+platstdlib = {userbase}/lib/python{py_version_short}
+purelib = {userbase}/lib/python{py_version_short}/site-packages
+platlib = {userbase}/lib/python{py_version_short}/site-packages
+include = {userbase}/include/python{py_version_short}
+scripts = {userbase}/bin
+data = {userbase}
+
+[nt_user]
+stdlib = {userbase}/Python{py_version_nodot}
+platstdlib = {userbase}/Python{py_version_nodot}
+purelib = {userbase}/Python{py_version_nodot}/site-packages
+platlib = {userbase}/Python{py_version_nodot}/site-packages
+include = {userbase}/Python{py_version_nodot}/Include
+scripts = {userbase}/Scripts
+data = {userbase}
+
+[posix_user]
+stdlib = {userbase}/lib/python{py_version_short}
+platstdlib = {userbase}/lib/python{py_version_short}
+purelib = {userbase}/lib/python{py_version_short}/site-packages
+platlib = {userbase}/lib/python{py_version_short}/site-packages
+include = {userbase}/include/python{py_version_short}
+scripts = {userbase}/bin
+data = {userbase}
+
+[osx_framework_user]
+stdlib = {userbase}/lib/python
+platstdlib = {userbase}/lib/python
+purelib = {userbase}/lib/python/site-packages
+platlib = {userbase}/lib/python/site-packages
+include = {userbase}/include
+scripts = {userbase}/bin
+data = {userbase}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/sysconfig.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/sysconfig.py
new file mode 100644
index 0000000..b470a37
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/sysconfig.py
@@ -0,0 +1,786 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""Access to Python's configuration information."""
+
+import codecs
+import os
+import re
+import sys
+from os.path import pardir, realpath
+try:
+    import configparser
+except ImportError:
+    import ConfigParser as configparser
+
+
+__all__ = [
+    'get_config_h_filename',
+    'get_config_var',
+    'get_config_vars',
+    'get_makefile_filename',
+    'get_path',
+    'get_path_names',
+    'get_paths',
+    'get_platform',
+    'get_python_version',
+    'get_scheme_names',
+    'parse_config_h',
+]
+
+
+def _safe_realpath(path):
+    try:
+        return realpath(path)
+    except OSError:
+        return path
+
+
+if sys.executable:
+    _PROJECT_BASE = os.path.dirname(_safe_realpath(sys.executable))
+else:
+    # sys.executable can be empty if argv[0] has been changed and Python is
+    # unable to retrieve the real program name
+    _PROJECT_BASE = _safe_realpath(os.getcwd())
+
+if os.name == "nt" and "pcbuild" in _PROJECT_BASE[-8:].lower():
+    _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir))
+# PC/VS7.1
+if os.name == "nt" and "\\pc\\v" in _PROJECT_BASE[-10:].lower():
+    _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))
+# PC/AMD64
+if os.name == "nt" and "\\pcbuild\\amd64" in _PROJECT_BASE[-14:].lower():
+    _PROJECT_BASE = _safe_realpath(os.path.join(_PROJECT_BASE, pardir, pardir))
+
+
+def is_python_build():
+    for fn in ("Setup.dist", "Setup.local"):
+        if os.path.isfile(os.path.join(_PROJECT_BASE, "Modules", fn)):
+            return True
+    return False
+
+_PYTHON_BUILD = is_python_build()
+
+_cfg_read = False
+
+def _ensure_cfg_read():
+    global _cfg_read
+    if not _cfg_read:
+        from ..resources import finder
+        backport_package = __name__.rsplit('.', 1)[0]
+        _finder = finder(backport_package)
+        _cfgfile = _finder.find('sysconfig.cfg')
+        assert _cfgfile, 'sysconfig.cfg exists'
+        with _cfgfile.as_stream() as s:
+            _SCHEMES.readfp(s)
+        if _PYTHON_BUILD:
+            for scheme in ('posix_prefix', 'posix_home'):
+                _SCHEMES.set(scheme, 'include', '{srcdir}/Include')
+                _SCHEMES.set(scheme, 'platinclude', '{projectbase}/.')
+
+        _cfg_read = True
+
+
+_SCHEMES = configparser.RawConfigParser()
+_VAR_REPL = re.compile(r'\{([^{]*?)\}')
+
+def _expand_globals(config):
+    _ensure_cfg_read()
+    if config.has_section('globals'):
+        globals = config.items('globals')
+    else:
+        globals = tuple()
+
+    sections = config.sections()
+    for section in sections:
+        if section == 'globals':
+            continue
+        for option, value in globals:
+            if config.has_option(section, option):
+                continue
+            config.set(section, option, value)
+    config.remove_section('globals')
+
+    # now expanding local variables defined in the cfg file
+    #
+    for section in config.sections():
+        variables = dict(config.items(section))
+
+        def _replacer(matchobj):
+            name = matchobj.group(1)
+            if name in variables:
+                return variables[name]
+            return matchobj.group(0)
+
+        for option, value in config.items(section):
+            config.set(section, option, _VAR_REPL.sub(_replacer, value))
+
+#_expand_globals(_SCHEMES)
+
+_PY_VERSION = '%s.%s.%s' % sys.version_info[:3]
+_PY_VERSION_SHORT = '%s.%s' % sys.version_info[:2]
+_PY_VERSION_SHORT_NO_DOT = '%s%s' % sys.version_info[:2]
+_PREFIX = os.path.normpath(sys.prefix)
+_EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
+_CONFIG_VARS = None
+_USER_BASE = None
+
+
+def _subst_vars(path, local_vars):
+    """In the string `path`, replace tokens like {some.thing} with the
+    corresponding value from the map `local_vars`.
+
+    If there is no corresponding value, leave the token unchanged.
+    """
+    def _replacer(matchobj):
+        name = matchobj.group(1)
+        if name in local_vars:
+            return local_vars[name]
+        elif name in os.environ:
+            return os.environ[name]
+        return matchobj.group(0)
+    return _VAR_REPL.sub(_replacer, path)
+
+
+def _extend_dict(target_dict, other_dict):
+    target_keys = target_dict.keys()
+    for key, value in other_dict.items():
+        if key in target_keys:
+            continue
+        target_dict[key] = value
+
+
+def _expand_vars(scheme, vars):
+    res = {}
+    if vars is None:
+        vars = {}
+    _extend_dict(vars, get_config_vars())
+
+    for key, value in _SCHEMES.items(scheme):
+        if os.name in ('posix', 'nt'):
+            value = os.path.expanduser(value)
+        res[key] = os.path.normpath(_subst_vars(value, vars))
+    return res
+
+
+def format_value(value, vars):
+    def _replacer(matchobj):
+        name = matchobj.group(1)
+        if name in vars:
+            return vars[name]
+        return matchobj.group(0)
+    return _VAR_REPL.sub(_replacer, value)
+
+
+def _get_default_scheme():
+    if os.name == 'posix':
+        # the default scheme for posix is posix_prefix
+        return 'posix_prefix'
+    return os.name
+
+
+def _getuserbase():
+    env_base = os.environ.get("PYTHONUSERBASE", None)
+
+    def joinuser(*args):
+        return os.path.expanduser(os.path.join(*args))
+
+    # what about 'os2emx', 'riscos' ?
+    if os.name == "nt":
+        base = os.environ.get("APPDATA") or "~"
+        if env_base:
+            return env_base
+        else:
+            return joinuser(base, "Python")
+
+    if sys.platform == "darwin":
+        framework = get_config_var("PYTHONFRAMEWORK")
+        if framework:
+            if env_base:
+                return env_base
+            else:
+                return joinuser("~", "Library", framework, "%d.%d" %
+                                sys.version_info[:2])
+
+    if env_base:
+        return env_base
+    else:
+        return joinuser("~", ".local")
+
+
+def _parse_makefile(filename, vars=None):
+    """Parse a Makefile-style file.
+
+    A dictionary containing name/value pairs is returned.  If an
+    optional dictionary is passed in as the second argument, it is
+    used instead of a new dictionary.
+    """
+    # Regexes needed for parsing Makefile (and similar syntaxes,
+    # like old-style Setup files).
+    _variable_rx = re.compile(r"([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)")
+    _findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
+    _findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
+
+    if vars is None:
+        vars = {}
+    done = {}
+    notdone = {}
+
+    with codecs.open(filename, encoding='utf-8', errors="surrogateescape") as f:
+        lines = f.readlines()
+
+    for line in lines:
+        if line.startswith('#') or line.strip() == '':
+            continue
+        m = _variable_rx.match(line)
+        if m:
+            n, v = m.group(1, 2)
+            v = v.strip()
+            # `$$' is a literal `$' in make
+            tmpv = v.replace('$$', '')
+
+            if "$" in tmpv:
+                notdone[n] = v
+            else:
+                try:
+                    v = int(v)
+                except ValueError:
+                    # insert literal `$'
+                    done[n] = v.replace('$$', '$')
+                else:
+                    done[n] = v
+
+    # do variable interpolation here
+    variables = list(notdone.keys())
+
+    # Variables with a 'PY_' prefix in the makefile. These need to
+    # be made available without that prefix through sysconfig.
+    # Special care is needed to ensure that variable expansion works, even
+    # if the expansion uses the name without a prefix.
+    renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS')
+
+    while len(variables) > 0:
+        for name in tuple(variables):
+            value = notdone[name]
+            m = _findvar1_rx.search(value) or _findvar2_rx.search(value)
+            if m is not None:
+                n = m.group(1)
+                found = True
+                if n in done:
+                    item = str(done[n])
+                elif n in notdone:
+                    # get it on a subsequent round
+                    found = False
+                elif n in os.environ:
+                    # do it like make: fall back to environment
+                    item = os.environ[n]
+
+                elif n in renamed_variables:
+                    if (name.startswith('PY_') and
+                        name[3:] in renamed_variables):
+                        item = ""
+
+                    elif 'PY_' + n in notdone:
+                        found = False
+
+                    else:
+                        item = str(done['PY_' + n])
+
+                else:
+                    done[n] = item = ""
+
+                if found:
+                    after = value[m.end():]
+                    value = value[:m.start()] + item + after
+                    if "$" in after:
+                        notdone[name] = value
+                    else:
+                        try:
+                            value = int(value)
+                        except ValueError:
+                            done[name] = value.strip()
+                        else:
+                            done[name] = value
+                        variables.remove(name)
+
+                        if (name.startswith('PY_') and
+                            name[3:] in renamed_variables):
+
+                            name = name[3:]
+                            if name not in done:
+                                done[name] = value
+
+            else:
+                # bogus variable reference (e.g. "prefix=$/opt/python");
+                # just drop it since we can't deal
+                done[name] = value
+                variables.remove(name)
+
+    # strip spurious spaces
+    for k, v in done.items():
+        if isinstance(v, str):
+            done[k] = v.strip()
+
+    # save the results in the global dictionary
+    vars.update(done)
+    return vars
+
+
+def get_makefile_filename():
+    """Return the path of the Makefile."""
+    if _PYTHON_BUILD:
+        return os.path.join(_PROJECT_BASE, "Makefile")
+    if hasattr(sys, 'abiflags'):
+        config_dir_name = 'config-%s%s' % (_PY_VERSION_SHORT, sys.abiflags)
+    else:
+        config_dir_name = 'config'
+    return os.path.join(get_path('stdlib'), config_dir_name, 'Makefile')
+
+
+def _init_posix(vars):
+    """Initialize the module as appropriate for POSIX systems."""
+    # load the installed Makefile:
+    makefile = get_makefile_filename()
+    try:
+        _parse_makefile(makefile, vars)
+    except IOError as e:
+        msg = "invalid Python installation: unable to open %s" % makefile
+        if hasattr(e, "strerror"):
+            msg = msg + " (%s)" % e.strerror
+        raise IOError(msg)
+    # load the installed pyconfig.h:
+    config_h = get_config_h_filename()
+    try:
+        with open(config_h) as f:
+            parse_config_h(f, vars)
+    except IOError as e:
+        msg = "invalid Python installation: unable to open %s" % config_h
+        if hasattr(e, "strerror"):
+            msg = msg + " (%s)" % e.strerror
+        raise IOError(msg)
+    # On AIX, there are wrong paths to the linker scripts in the Makefile
+    # -- these paths are relative to the Python source, but when installed
+    # the scripts are in another directory.
+    if _PYTHON_BUILD:
+        vars['LDSHARED'] = vars['BLDSHARED']
+
+
+def _init_non_posix(vars):
+    """Initialize the module as appropriate for NT"""
+    # set basic install directories
+    vars['LIBDEST'] = get_path('stdlib')
+    vars['BINLIBDEST'] = get_path('platstdlib')
+    vars['INCLUDEPY'] = get_path('include')
+    vars['SO'] = '.pyd'
+    vars['EXE'] = '.exe'
+    vars['VERSION'] = _PY_VERSION_SHORT_NO_DOT
+    vars['BINDIR'] = os.path.dirname(_safe_realpath(sys.executable))
+
+#
+# public APIs
+#
+
+
+def parse_config_h(fp, vars=None):
+    """Parse a config.h-style file.
+
+    A dictionary containing name/value pairs is returned.  If an
+    optional dictionary is passed in as the second argument, it is
+    used instead of a new dictionary.
+    """
+    if vars is None:
+        vars = {}
+    define_rx = re.compile("#define ([A-Z][A-Za-z0-9_]+) (.*)\n")
+    undef_rx = re.compile("/[*] #undef ([A-Z][A-Za-z0-9_]+) [*]/\n")
+
+    while True:
+        line = fp.readline()
+        if not line:
+            break
+        m = define_rx.match(line)
+        if m:
+            n, v = m.group(1, 2)
+            try:
+                v = int(v)
+            except ValueError:
+                pass
+            vars[n] = v
+        else:
+            m = undef_rx.match(line)
+            if m:
+                vars[m.group(1)] = 0
+    return vars
+
+
+def get_config_h_filename():
+    """Return the path of pyconfig.h."""
+    if _PYTHON_BUILD:
+        if os.name == "nt":
+            inc_dir = os.path.join(_PROJECT_BASE, "PC")
+        else:
+            inc_dir = _PROJECT_BASE
+    else:
+        inc_dir = get_path('platinclude')
+    return os.path.join(inc_dir, 'pyconfig.h')
+
+
+def get_scheme_names():
+    """Return a tuple containing the schemes names."""
+    return tuple(sorted(_SCHEMES.sections()))
+
+
+def get_path_names():
+    """Return a tuple containing the paths names."""
+    # xxx see if we want a static list
+    return _SCHEMES.options('posix_prefix')
+
+
+def get_paths(scheme=_get_default_scheme(), vars=None, expand=True):
+    """Return a mapping containing an install scheme.
+
+    ``scheme`` is the install scheme name. If not provided, it will
+    return the default scheme for the current platform.
+    """
+    _ensure_cfg_read()
+    if expand:
+        return _expand_vars(scheme, vars)
+    else:
+        return dict(_SCHEMES.items(scheme))
+
+
+def get_path(name, scheme=_get_default_scheme(), vars=None, expand=True):
+    """Return a path corresponding to the scheme.
+
+    ``scheme`` is the install scheme name.
+    """
+    return get_paths(scheme, vars, expand)[name]
+
+
+def get_config_vars(*args):
+    """With no arguments, return a dictionary of all configuration
+    variables relevant for the current platform.
+
+    On Unix, this means every variable defined in Python's installed Makefile;
+    On Windows and Mac OS it's a much smaller set.
+
+    With arguments, return a list of values that result from looking up
+    each argument in the configuration variable dictionary.
+    """
+    global _CONFIG_VARS
+    if _CONFIG_VARS is None:
+        _CONFIG_VARS = {}
+        # Normalized versions of prefix and exec_prefix are handy to have;
+        # in fact, these are the standard versions used most places in the
+        # distutils2 module.
+        _CONFIG_VARS['prefix'] = _PREFIX
+        _CONFIG_VARS['exec_prefix'] = _EXEC_PREFIX
+        _CONFIG_VARS['py_version'] = _PY_VERSION
+        _CONFIG_VARS['py_version_short'] = _PY_VERSION_SHORT
+        _CONFIG_VARS['py_version_nodot'] = _PY_VERSION[0] + _PY_VERSION[2]
+        _CONFIG_VARS['base'] = _PREFIX
+        _CONFIG_VARS['platbase'] = _EXEC_PREFIX
+        _CONFIG_VARS['projectbase'] = _PROJECT_BASE
+        try:
+            _CONFIG_VARS['abiflags'] = sys.abiflags
+        except AttributeError:
+            # sys.abiflags may not be defined on all platforms.
+            _CONFIG_VARS['abiflags'] = ''
+
+        if os.name in ('nt', 'os2'):
+            _init_non_posix(_CONFIG_VARS)
+        if os.name == 'posix':
+            _init_posix(_CONFIG_VARS)
+        # Setting 'userbase' is done below the call to the
+        # init function to enable using 'get_config_var' in
+        # the init-function.
+        if sys.version >= '2.6':
+            _CONFIG_VARS['userbase'] = _getuserbase()
+
+        if 'srcdir' not in _CONFIG_VARS:
+            _CONFIG_VARS['srcdir'] = _PROJECT_BASE
+        else:
+            _CONFIG_VARS['srcdir'] = _safe_realpath(_CONFIG_VARS['srcdir'])
+
+        # Convert srcdir into an absolute path if it appears necessary.
+        # Normally it is relative to the build directory.  However, during
+        # testing, for example, we might be running a non-installed python
+        # from a different directory.
+        if _PYTHON_BUILD and os.name == "posix":
+            base = _PROJECT_BASE
+            try:
+                cwd = os.getcwd()
+            except OSError:
+                cwd = None
+            if (not os.path.isabs(_CONFIG_VARS['srcdir']) and
+                base != cwd):
+                # srcdir is relative and we are not in the same directory
+                # as the executable. Assume executable is in the build
+                # directory and make srcdir absolute.
+                srcdir = os.path.join(base, _CONFIG_VARS['srcdir'])
+                _CONFIG_VARS['srcdir'] = os.path.normpath(srcdir)
+
+        if sys.platform == 'darwin':
+            kernel_version = os.uname()[2]  # Kernel version (8.4.3)
+            major_version = int(kernel_version.split('.')[0])
+
+            if major_version < 8:
+                # On Mac OS X before 10.4, check if -arch and -isysroot
+                # are in CFLAGS or LDFLAGS and remove them if they are.
+                # This is needed when building extensions on a 10.3 system
+                # using a universal build of python.
+                for key in ('LDFLAGS', 'BASECFLAGS',
+                        # a number of derived variables. These need to be
+                        # patched up as well.
+                        'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
+                    flags = _CONFIG_VARS[key]
+                    flags = re.sub(r'-arch\s+\w+\s', ' ', flags)
+                    flags = re.sub('-isysroot [^ \t]*', ' ', flags)
+                    _CONFIG_VARS[key] = flags
+            else:
+                # Allow the user to override the architecture flags using
+                # an environment variable.
+                # NOTE: This name was introduced by Apple in OSX 10.5 and
+                # is used by several scripting languages distributed with
+                # that OS release.
+                if 'ARCHFLAGS' in os.environ:
+                    arch = os.environ['ARCHFLAGS']
+                    for key in ('LDFLAGS', 'BASECFLAGS',
+                        # a number of derived variables. These need to be
+                        # patched up as well.
+                        'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
+
+                        flags = _CONFIG_VARS[key]
+                        flags = re.sub(r'-arch\s+\w+\s', ' ', flags)
+                        flags = flags + ' ' + arch
+                        _CONFIG_VARS[key] = flags
+
+                # If we're on OSX 10.5 or later and the user tries to
+                # compiles an extension using an SDK that is not present
+                # on the current machine it is better to not use an SDK
+                # than to fail.
+                #
+                # The major usecase for this is users using a Python.org
+                # binary installer  on OSX 10.6: that installer uses
+                # the 10.4u SDK, but that SDK is not installed by default
+                # when you install Xcode.
+                #
+                CFLAGS = _CONFIG_VARS.get('CFLAGS', '')
+                m = re.search(r'-isysroot\s+(\S+)', CFLAGS)
+                if m is not None:
+                    sdk = m.group(1)
+                    if not os.path.exists(sdk):
+                        for key in ('LDFLAGS', 'BASECFLAGS',
+                             # a number of derived variables. These need to be
+                             # patched up as well.
+                            'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
+
+                            flags = _CONFIG_VARS[key]
+                            flags = re.sub(r'-isysroot\s+\S+(\s|$)', ' ', flags)
+                            _CONFIG_VARS[key] = flags
+
+    if args:
+        vals = []
+        for name in args:
+            vals.append(_CONFIG_VARS.get(name))
+        return vals
+    else:
+        return _CONFIG_VARS
+
+
+def get_config_var(name):
+    """Return the value of a single variable using the dictionary returned by
+    'get_config_vars()'.
+
+    Equivalent to get_config_vars().get(name)
+    """
+    return get_config_vars().get(name)
+
+
+def get_platform():
+    """Return a string that identifies the current platform.
+
+    This is used mainly to distinguish platform-specific build directories and
+    platform-specific built distributions.  Typically includes the OS name
+    and version and the architecture (as supplied by 'os.uname()'),
+    although the exact information included depends on the OS; eg. for IRIX
+    the architecture isn't particularly important (IRIX only runs on SGI
+    hardware), but for Linux the kernel version isn't particularly
+    important.
+
+    Examples of returned values:
+       linux-i586
+       linux-alpha (?)
+       solaris-2.6-sun4u
+       irix-5.3
+       irix64-6.2
+
+    Windows will return one of:
+       win-amd64 (64bit Windows on AMD64 (aka x86_64, Intel64, EM64T, etc)
+       win-ia64 (64bit Windows on Itanium)
+       win32 (all others - specifically, sys.platform is returned)
+
+    For other non-POSIX platforms, currently just returns 'sys.platform'.
+    """
+    if os.name == 'nt':
+        # sniff sys.version for architecture.
+        prefix = " bit ("
+        i = sys.version.find(prefix)
+        if i == -1:
+            return sys.platform
+        j = sys.version.find(")", i)
+        look = sys.version[i+len(prefix):j].lower()
+        if look == 'amd64':
+            return 'win-amd64'
+        if look == 'itanium':
+            return 'win-ia64'
+        return sys.platform
+
+    if os.name != "posix" or not hasattr(os, 'uname'):
+        # XXX what about the architecture? NT is Intel or Alpha,
+        # Mac OS is M68k or PPC, etc.
+        return sys.platform
+
+    # Try to distinguish various flavours of Unix
+    osname, host, release, version, machine = os.uname()
+
+    # Convert the OS name to lowercase, remove '/' characters
+    # (to accommodate BSD/OS), and translate spaces (for "Power Macintosh")
+    osname = osname.lower().replace('/', '')
+    machine = machine.replace(' ', '_')
+    machine = machine.replace('/', '-')
+
+    if osname[:5] == "linux":
+        # At least on Linux/Intel, 'machine' is the processor --
+        # i386, etc.
+        # XXX what about Alpha, SPARC, etc?
+        return  "%s-%s" % (osname, machine)
+    elif osname[:5] == "sunos":
+        if release[0] >= "5":           # SunOS 5 == Solaris 2
+            osname = "solaris"
+            release = "%d.%s" % (int(release[0]) - 3, release[2:])
+        # fall through to standard osname-release-machine representation
+    elif osname[:4] == "irix":              # could be "irix64"!
+        return "%s-%s" % (osname, release)
+    elif osname[:3] == "aix":
+        return "%s-%s.%s" % (osname, version, release)
+    elif osname[:6] == "cygwin":
+        osname = "cygwin"
+        rel_re = re.compile(r'[\d.]+')
+        m = rel_re.match(release)
+        if m:
+            release = m.group()
+    elif osname[:6] == "darwin":
+        #
+        # For our purposes, we'll assume that the system version from
+        # distutils' perspective is what MACOSX_DEPLOYMENT_TARGET is set
+        # to. This makes the compatibility story a bit more sane because the
+        # machine is going to compile and link as if it were
+        # MACOSX_DEPLOYMENT_TARGET.
+        cfgvars = get_config_vars()
+        macver = cfgvars.get('MACOSX_DEPLOYMENT_TARGET')
+
+        if True:
+            # Always calculate the release of the running machine,
+            # needed to determine if we can build fat binaries or not.
+
+            macrelease = macver
+            # Get the system version. Reading this plist is a documented
+            # way to get the system version (see the documentation for
+            # the Gestalt Manager)
+            try:
+                f = open('/System/Library/CoreServices/SystemVersion.plist')
+            except IOError:
+                # We're on a plain darwin box, fall back to the default
+                # behaviour.
+                pass
+            else:
+                try:
+                    m = re.search(r'<key>ProductUserVisibleVersion</key>\s*'
+                                  r'<string>(.*?)</string>', f.read())
+                finally:
+                    f.close()
+                if m is not None:
+                    macrelease = '.'.join(m.group(1).split('.')[:2])
+                # else: fall back to the default behaviour
+
+        if not macver:
+            macver = macrelease
+
+        if macver:
+            release = macver
+            osname = "macosx"
+
+            if ((macrelease + '.') >= '10.4.' and
+                '-arch' in get_config_vars().get('CFLAGS', '').strip()):
+                # The universal build will build fat binaries, but not on
+                # systems before 10.4
+                #
+                # Try to detect 4-way universal builds, those have machine-type
+                # 'universal' instead of 'fat'.
+
+                machine = 'fat'
+                cflags = get_config_vars().get('CFLAGS')
+
+                archs = re.findall(r'-arch\s+(\S+)', cflags)
+                archs = tuple(sorted(set(archs)))
+
+                if len(archs) == 1:
+                    machine = archs[0]
+                elif archs == ('i386', 'ppc'):
+                    machine = 'fat'
+                elif archs == ('i386', 'x86_64'):
+                    machine = 'intel'
+                elif archs == ('i386', 'ppc', 'x86_64'):
+                    machine = 'fat3'
+                elif archs == ('ppc64', 'x86_64'):
+                    machine = 'fat64'
+                elif archs == ('i386', 'ppc', 'ppc64', 'x86_64'):
+                    machine = 'universal'
+                else:
+                    raise ValueError(
+                       "Don't know machine value for archs=%r" % (archs,))
+
+            elif machine == 'i386':
+                # On OSX the machine type returned by uname is always the
+                # 32-bit variant, even if the executable architecture is
+                # the 64-bit variant
+                if sys.maxsize >= 2**32:
+                    machine = 'x86_64'
+
+            elif machine in ('PowerPC', 'Power_Macintosh'):
+                # Pick a sane name for the PPC architecture.
+                # See 'i386' case
+                if sys.maxsize >= 2**32:
+                    machine = 'ppc64'
+                else:
+                    machine = 'ppc'
+
+    return "%s-%s-%s" % (osname, release, machine)
+
+
+def get_python_version():
+    return _PY_VERSION_SHORT
+
+
+def _print_dict(title, data):
+    for index, (key, value) in enumerate(sorted(data.items())):
+        if index == 0:
+            print('%s: ' % (title))
+        print('\t%s = "%s"' % (key, value))
+
+
+def _main():
+    """Display all information sysconfig detains."""
+    print('Platform: "%s"' % get_platform())
+    print('Python version: "%s"' % get_python_version())
+    print('Current installation scheme: "%s"' % _get_default_scheme())
+    print()
+    _print_dict('Paths', get_paths())
+    print()
+    _print_dict('Variables', get_config_vars())
+
+
+if __name__ == '__main__':
+    _main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/tarfile.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/tarfile.py
new file mode 100644
index 0000000..d66d856
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/_backport/tarfile.py
@@ -0,0 +1,2607 @@
+#-------------------------------------------------------------------
+# tarfile.py
+#-------------------------------------------------------------------
+# Copyright (C) 2002 Lars Gustaebel <lars@gustaebel.de>
+# All rights reserved.
+#
+# Permission  is  hereby granted,  free  of charge,  to  any person
+# obtaining a  copy of  this software  and associated documentation
+# files  (the  "Software"),  to   deal  in  the  Software   without
+# restriction,  including  without limitation  the  rights to  use,
+# copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies  of  the  Software,  and to  permit  persons  to  whom the
+# Software  is  furnished  to  do  so,  subject  to  the  following
+# conditions:
+#
+# The above copyright  notice and this  permission notice shall  be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS  IS", WITHOUT WARRANTY OF ANY  KIND,
+# EXPRESS OR IMPLIED, INCLUDING  BUT NOT LIMITED TO  THE WARRANTIES
+# OF  MERCHANTABILITY,  FITNESS   FOR  A  PARTICULAR   PURPOSE  AND
+# NONINFRINGEMENT.  IN  NO  EVENT SHALL  THE  AUTHORS  OR COPYRIGHT
+# HOLDERS  BE LIABLE  FOR ANY  CLAIM, DAMAGES  OR OTHER  LIABILITY,
+# WHETHER  IN AN  ACTION OF  CONTRACT, TORT  OR OTHERWISE,  ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+# OTHER DEALINGS IN THE SOFTWARE.
+#
+from __future__ import print_function
+
+"""Read from and write to tar format archives.
+"""
+
+__version__ = "$Revision$"
+
+version     = "0.9.0"
+__author__  = "Lars Gust\u00e4bel (lars@gustaebel.de)"
+__date__    = "$Date: 2011-02-25 17:42:01 +0200 (Fri, 25 Feb 2011) $"
+__cvsid__   = "$Id: tarfile.py 88586 2011-02-25 15:42:01Z marc-andre.lemburg $"
+__credits__ = "Gustavo Niemeyer, Niels Gust\u00e4bel, Richard Townsend."
+
+#---------
+# Imports
+#---------
+import sys
+import os
+import stat
+import errno
+import time
+import struct
+import copy
+import re
+
+try:
+    import grp, pwd
+except ImportError:
+    grp = pwd = None
+
+# os.symlink on Windows prior to 6.0 raises NotImplementedError
+symlink_exception = (AttributeError, NotImplementedError)
+try:
+    # WindowsError (1314) will be raised if the caller does not hold the
+    # SeCreateSymbolicLinkPrivilege privilege
+    symlink_exception += (WindowsError,)
+except NameError:
+    pass
+
+# from tarfile import *
+__all__ = ["TarFile", "TarInfo", "is_tarfile", "TarError"]
+
+if sys.version_info[0] < 3:
+    import __builtin__ as builtins
+else:
+    import builtins
+
+_open = builtins.open   # Since 'open' is TarFile.open
+
+#---------------------------------------------------------
+# tar constants
+#---------------------------------------------------------
+NUL = b"\0"                     # the null character
+BLOCKSIZE = 512                 # length of processing blocks
+RECORDSIZE = BLOCKSIZE * 20     # length of records
+GNU_MAGIC = b"ustar  \0"        # magic gnu tar string
+POSIX_MAGIC = b"ustar\x0000"    # magic posix tar string
+
+LENGTH_NAME = 100               # maximum length of a filename
+LENGTH_LINK = 100               # maximum length of a linkname
+LENGTH_PREFIX = 155             # maximum length of the prefix field
+
+REGTYPE = b"0"                  # regular file
+AREGTYPE = b"\0"                # regular file
+LNKTYPE = b"1"                  # link (inside tarfile)
+SYMTYPE = b"2"                  # symbolic link
+CHRTYPE = b"3"                  # character special device
+BLKTYPE = b"4"                  # block special device
+DIRTYPE = b"5"                  # directory
+FIFOTYPE = b"6"                 # fifo special device
+CONTTYPE = b"7"                 # contiguous file
+
+GNUTYPE_LONGNAME = b"L"         # GNU tar longname
+GNUTYPE_LONGLINK = b"K"         # GNU tar longlink
+GNUTYPE_SPARSE = b"S"           # GNU tar sparse file
+
+XHDTYPE = b"x"                  # POSIX.1-2001 extended header
+XGLTYPE = b"g"                  # POSIX.1-2001 global header
+SOLARIS_XHDTYPE = b"X"          # Solaris extended header
+
+USTAR_FORMAT = 0                # POSIX.1-1988 (ustar) format
+GNU_FORMAT = 1                  # GNU tar format
+PAX_FORMAT = 2                  # POSIX.1-2001 (pax) format
+DEFAULT_FORMAT = GNU_FORMAT
+
+#---------------------------------------------------------
+# tarfile constants
+#---------------------------------------------------------
+# File types that tarfile supports:
+SUPPORTED_TYPES = (REGTYPE, AREGTYPE, LNKTYPE,
+                   SYMTYPE, DIRTYPE, FIFOTYPE,
+                   CONTTYPE, CHRTYPE, BLKTYPE,
+                   GNUTYPE_LONGNAME, GNUTYPE_LONGLINK,
+                   GNUTYPE_SPARSE)
+
+# File types that will be treated as a regular file.
+REGULAR_TYPES = (REGTYPE, AREGTYPE,
+                 CONTTYPE, GNUTYPE_SPARSE)
+
+# File types that are part of the GNU tar format.
+GNU_TYPES = (GNUTYPE_LONGNAME, GNUTYPE_LONGLINK,
+             GNUTYPE_SPARSE)
+
+# Fields from a pax header that override a TarInfo attribute.
+PAX_FIELDS = ("path", "linkpath", "size", "mtime",
+              "uid", "gid", "uname", "gname")
+
+# Fields from a pax header that are affected by hdrcharset.
+PAX_NAME_FIELDS = set(("path", "linkpath", "uname", "gname"))
+
+# Fields in a pax header that are numbers, all other fields
+# are treated as strings.
+PAX_NUMBER_FIELDS = {
+    "atime": float,
+    "ctime": float,
+    "mtime": float,
+    "uid": int,
+    "gid": int,
+    "size": int
+}
+
+#---------------------------------------------------------
+# Bits used in the mode field, values in octal.
+#---------------------------------------------------------
+S_IFLNK = 0o120000        # symbolic link
+S_IFREG = 0o100000        # regular file
+S_IFBLK = 0o060000        # block device
+S_IFDIR = 0o040000        # directory
+S_IFCHR = 0o020000        # character device
+S_IFIFO = 0o010000        # fifo
+
+TSUID   = 0o4000          # set UID on execution
+TSGID   = 0o2000          # set GID on execution
+TSVTX   = 0o1000          # reserved
+
+TUREAD  = 0o400           # read by owner
+TUWRITE = 0o200           # write by owner
+TUEXEC  = 0o100           # execute/search by owner
+TGREAD  = 0o040           # read by group
+TGWRITE = 0o020           # write by group
+TGEXEC  = 0o010           # execute/search by group
+TOREAD  = 0o004           # read by other
+TOWRITE = 0o002           # write by other
+TOEXEC  = 0o001           # execute/search by other
+
+#---------------------------------------------------------
+# initialization
+#---------------------------------------------------------
+if os.name in ("nt", "ce"):
+    ENCODING = "utf-8"
+else:
+    ENCODING = sys.getfilesystemencoding()
+
+#---------------------------------------------------------
+# Some useful functions
+#---------------------------------------------------------
+
+def stn(s, length, encoding, errors):
+    """Convert a string to a null-terminated bytes object.
+    """
+    s = s.encode(encoding, errors)
+    return s[:length] + (length - len(s)) * NUL
+
+def nts(s, encoding, errors):
+    """Convert a null-terminated bytes object to a string.
+    """
+    p = s.find(b"\0")
+    if p != -1:
+        s = s[:p]
+    return s.decode(encoding, errors)
+
+def nti(s):
+    """Convert a number field to a python number.
+    """
+    # There are two possible encodings for a number field, see
+    # itn() below.
+    if s[0] != chr(0o200):
+        try:
+            n = int(nts(s, "ascii", "strict") or "0", 8)
+        except ValueError:
+            raise InvalidHeaderError("invalid header")
+    else:
+        n = 0
+        for i in range(len(s) - 1):
+            n <<= 8
+            n += ord(s[i + 1])
+    return n
+
+def itn(n, digits=8, format=DEFAULT_FORMAT):
+    """Convert a python number to a number field.
+    """
+    # POSIX 1003.1-1988 requires numbers to be encoded as a string of
+    # octal digits followed by a null-byte, this allows values up to
+    # (8**(digits-1))-1. GNU tar allows storing numbers greater than
+    # that if necessary. A leading 0o200 byte indicates this particular
+    # encoding, the following digits-1 bytes are a big-endian
+    # representation. This allows values up to (256**(digits-1))-1.
+    if 0 <= n < 8 ** (digits - 1):
+        s = ("%0*o" % (digits - 1, n)).encode("ascii") + NUL
+    else:
+        if format != GNU_FORMAT or n >= 256 ** (digits - 1):
+            raise ValueError("overflow in number field")
+
+        if n < 0:
+            # XXX We mimic GNU tar's behaviour with negative numbers,
+            # this could raise OverflowError.
+            n = struct.unpack("L", struct.pack("l", n))[0]
+
+        s = bytearray()
+        for i in range(digits - 1):
+            s.insert(0, n & 0o377)
+            n >>= 8
+        s.insert(0, 0o200)
+    return s
+
+def calc_chksums(buf):
+    """Calculate the checksum for a member's header by summing up all
+       characters except for the chksum field which is treated as if
+       it was filled with spaces. According to the GNU tar sources,
+       some tars (Sun and NeXT) calculate chksum with signed char,
+       which will be different if there are chars in the buffer with
+       the high bit set. So we calculate two checksums, unsigned and
+       signed.
+    """
+    unsigned_chksum = 256 + sum(struct.unpack("148B", buf[:148]) + struct.unpack("356B", buf[156:512]))
+    signed_chksum = 256 + sum(struct.unpack("148b", buf[:148]) + struct.unpack("356b", buf[156:512]))
+    return unsigned_chksum, signed_chksum
+
+def copyfileobj(src, dst, length=None):
+    """Copy length bytes from fileobj src to fileobj dst.
+       If length is None, copy the entire content.
+    """
+    if length == 0:
+        return
+    if length is None:
+        while True:
+            buf = src.read(16*1024)
+            if not buf:
+                break
+            dst.write(buf)
+        return
+
+    BUFSIZE = 16 * 1024
+    blocks, remainder = divmod(length, BUFSIZE)
+    for b in range(blocks):
+        buf = src.read(BUFSIZE)
+        if len(buf) < BUFSIZE:
+            raise IOError("end of file reached")
+        dst.write(buf)
+
+    if remainder != 0:
+        buf = src.read(remainder)
+        if len(buf) < remainder:
+            raise IOError("end of file reached")
+        dst.write(buf)
+    return
+
+filemode_table = (
+    ((S_IFLNK,      "l"),
+     (S_IFREG,      "-"),
+     (S_IFBLK,      "b"),
+     (S_IFDIR,      "d"),
+     (S_IFCHR,      "c"),
+     (S_IFIFO,      "p")),
+
+    ((TUREAD,       "r"),),
+    ((TUWRITE,      "w"),),
+    ((TUEXEC|TSUID, "s"),
+     (TSUID,        "S"),
+     (TUEXEC,       "x")),
+
+    ((TGREAD,       "r"),),
+    ((TGWRITE,      "w"),),
+    ((TGEXEC|TSGID, "s"),
+     (TSGID,        "S"),
+     (TGEXEC,       "x")),
+
+    ((TOREAD,       "r"),),
+    ((TOWRITE,      "w"),),
+    ((TOEXEC|TSVTX, "t"),
+     (TSVTX,        "T"),
+     (TOEXEC,       "x"))
+)
+
+def filemode(mode):
+    """Convert a file's mode to a string of the form
+       -rwxrwxrwx.
+       Used by TarFile.list()
+    """
+    perm = []
+    for table in filemode_table:
+        for bit, char in table:
+            if mode & bit == bit:
+                perm.append(char)
+                break
+        else:
+            perm.append("-")
+    return "".join(perm)
+
+class TarError(Exception):
+    """Base exception."""
+    pass
+class ExtractError(TarError):
+    """General exception for extract errors."""
+    pass
+class ReadError(TarError):
+    """Exception for unreadable tar archives."""
+    pass
+class CompressionError(TarError):
+    """Exception for unavailable compression methods."""
+    pass
+class StreamError(TarError):
+    """Exception for unsupported operations on stream-like TarFiles."""
+    pass
+class HeaderError(TarError):
+    """Base exception for header errors."""
+    pass
+class EmptyHeaderError(HeaderError):
+    """Exception for empty headers."""
+    pass
+class TruncatedHeaderError(HeaderError):
+    """Exception for truncated headers."""
+    pass
+class EOFHeaderError(HeaderError):
+    """Exception for end of file headers."""
+    pass
+class InvalidHeaderError(HeaderError):
+    """Exception for invalid headers."""
+    pass
+class SubsequentHeaderError(HeaderError):
+    """Exception for missing and invalid extended headers."""
+    pass
+
+#---------------------------
+# internal stream interface
+#---------------------------
+class _LowLevelFile(object):
+    """Low-level file object. Supports reading and writing.
+       It is used instead of a regular file object for streaming
+       access.
+    """
+
+    def __init__(self, name, mode):
+        mode = {
+            "r": os.O_RDONLY,
+            "w": os.O_WRONLY | os.O_CREAT | os.O_TRUNC,
+        }[mode]
+        if hasattr(os, "O_BINARY"):
+            mode |= os.O_BINARY
+        self.fd = os.open(name, mode, 0o666)
+
+    def close(self):
+        os.close(self.fd)
+
+    def read(self, size):
+        return os.read(self.fd, size)
+
+    def write(self, s):
+        os.write(self.fd, s)
+
+class _Stream(object):
+    """Class that serves as an adapter between TarFile and
+       a stream-like object.  The stream-like object only
+       needs to have a read() or write() method and is accessed
+       blockwise.  Use of gzip or bzip2 compression is possible.
+       A stream-like object could be for example: sys.stdin,
+       sys.stdout, a socket, a tape device etc.
+
+       _Stream is intended to be used only internally.
+    """
+
+    def __init__(self, name, mode, comptype, fileobj, bufsize):
+        """Construct a _Stream object.
+        """
+        self._extfileobj = True
+        if fileobj is None:
+            fileobj = _LowLevelFile(name, mode)
+            self._extfileobj = False
+
+        if comptype == '*':
+            # Enable transparent compression detection for the
+            # stream interface
+            fileobj = _StreamProxy(fileobj)
+            comptype = fileobj.getcomptype()
+
+        self.name     = name or ""
+        self.mode     = mode
+        self.comptype = comptype
+        self.fileobj  = fileobj
+        self.bufsize  = bufsize
+        self.buf      = b""
+        self.pos      = 0
+        self.closed   = False
+
+        try:
+            if comptype == "gz":
+                try:
+                    import zlib
+                except ImportError:
+                    raise CompressionError("zlib module is not available")
+                self.zlib = zlib
+                self.crc = zlib.crc32(b"")
+                if mode == "r":
+                    self._init_read_gz()
+                else:
+                    self._init_write_gz()
+
+            if comptype == "bz2":
+                try:
+                    import bz2
+                except ImportError:
+                    raise CompressionError("bz2 module is not available")
+                if mode == "r":
+                    self.dbuf = b""
+                    self.cmp = bz2.BZ2Decompressor()
+                else:
+                    self.cmp = bz2.BZ2Compressor()
+        except:
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
+            raise
+
+    def __del__(self):
+        if hasattr(self, "closed") and not self.closed:
+            self.close()
+
+    def _init_write_gz(self):
+        """Initialize for writing with gzip compression.
+        """
+        self.cmp = self.zlib.compressobj(9, self.zlib.DEFLATED,
+                                            -self.zlib.MAX_WBITS,
+                                            self.zlib.DEF_MEM_LEVEL,
+                                            0)
+        timestamp = struct.pack("<L", int(time.time()))
+        self.__write(b"\037\213\010\010" + timestamp + b"\002\377")
+        if self.name.endswith(".gz"):
+            self.name = self.name[:-3]
+        # RFC1952 says we must use ISO-8859-1 for the FNAME field.
+        self.__write(self.name.encode("iso-8859-1", "replace") + NUL)
+
+    def write(self, s):
+        """Write string s to the stream.
+        """
+        if self.comptype == "gz":
+            self.crc = self.zlib.crc32(s, self.crc)
+        self.pos += len(s)
+        if self.comptype != "tar":
+            s = self.cmp.compress(s)
+        self.__write(s)
+
+    def __write(self, s):
+        """Write string s to the stream if a whole new block
+           is ready to be written.
+        """
+        self.buf += s
+        while len(self.buf) > self.bufsize:
+            self.fileobj.write(self.buf[:self.bufsize])
+            self.buf = self.buf[self.bufsize:]
+
+    def close(self):
+        """Close the _Stream object. No operation should be
+           done on it afterwards.
+        """
+        if self.closed:
+            return
+
+        if self.mode == "w" and self.comptype != "tar":
+            self.buf += self.cmp.flush()
+
+        if self.mode == "w" and self.buf:
+            self.fileobj.write(self.buf)
+            self.buf = b""
+            if self.comptype == "gz":
+                # The native zlib crc is an unsigned 32-bit integer, but
+                # the Python wrapper implicitly casts that to a signed C
+                # long.  So, on a 32-bit box self.crc may "look negative",
+                # while the same crc on a 64-bit box may "look positive".
+                # To avoid irksome warnings from the `struct` module, force
+                # it to look positive on all boxes.
+                self.fileobj.write(struct.pack("<L", self.crc & 0xffffffff))
+                self.fileobj.write(struct.pack("<L", self.pos & 0xffffFFFF))
+
+        if not self._extfileobj:
+            self.fileobj.close()
+
+        self.closed = True
+
+    def _init_read_gz(self):
+        """Initialize for reading a gzip compressed fileobj.
+        """
+        self.cmp = self.zlib.decompressobj(-self.zlib.MAX_WBITS)
+        self.dbuf = b""
+
+        # taken from gzip.GzipFile with some alterations
+        if self.__read(2) != b"\037\213":
+            raise ReadError("not a gzip file")
+        if self.__read(1) != b"\010":
+            raise CompressionError("unsupported compression method")
+
+        flag = ord(self.__read(1))
+        self.__read(6)
+
+        if flag & 4:
+            xlen = ord(self.__read(1)) + 256 * ord(self.__read(1))
+            self.read(xlen)
+        if flag & 8:
+            while True:
+                s = self.__read(1)
+                if not s or s == NUL:
+                    break
+        if flag & 16:
+            while True:
+                s = self.__read(1)
+                if not s or s == NUL:
+                    break
+        if flag & 2:
+            self.__read(2)
+
+    def tell(self):
+        """Return the stream's file pointer position.
+        """
+        return self.pos
+
+    def seek(self, pos=0):
+        """Set the stream's file pointer to pos. Negative seeking
+           is forbidden.
+        """
+        if pos - self.pos >= 0:
+            blocks, remainder = divmod(pos - self.pos, self.bufsize)
+            for i in range(blocks):
+                self.read(self.bufsize)
+            self.read(remainder)
+        else:
+            raise StreamError("seeking backwards is not allowed")
+        return self.pos
+
+    def read(self, size=None):
+        """Return the next size number of bytes from the stream.
+           If size is not defined, return all bytes of the stream
+           up to EOF.
+        """
+        if size is None:
+            t = []
+            while True:
+                buf = self._read(self.bufsize)
+                if not buf:
+                    break
+                t.append(buf)
+            buf = "".join(t)
+        else:
+            buf = self._read(size)
+        self.pos += len(buf)
+        return buf
+
+    def _read(self, size):
+        """Return size bytes from the stream.
+        """
+        if self.comptype == "tar":
+            return self.__read(size)
+
+        c = len(self.dbuf)
+        while c < size:
+            buf = self.__read(self.bufsize)
+            if not buf:
+                break
+            try:
+                buf = self.cmp.decompress(buf)
+            except IOError:
+                raise ReadError("invalid compressed data")
+            self.dbuf += buf
+            c += len(buf)
+        buf = self.dbuf[:size]
+        self.dbuf = self.dbuf[size:]
+        return buf
+
+    def __read(self, size):
+        """Return size bytes from stream. If internal buffer is empty,
+           read another block from the stream.
+        """
+        c = len(self.buf)
+        while c < size:
+            buf = self.fileobj.read(self.bufsize)
+            if not buf:
+                break
+            self.buf += buf
+            c += len(buf)
+        buf = self.buf[:size]
+        self.buf = self.buf[size:]
+        return buf
+# class _Stream
+
+class _StreamProxy(object):
+    """Small proxy class that enables transparent compression
+       detection for the Stream interface (mode 'r|*').
+    """
+
+    def __init__(self, fileobj):
+        self.fileobj = fileobj
+        self.buf = self.fileobj.read(BLOCKSIZE)
+
+    def read(self, size):
+        self.read = self.fileobj.read
+        return self.buf
+
+    def getcomptype(self):
+        if self.buf.startswith(b"\037\213\010"):
+            return "gz"
+        if self.buf.startswith(b"BZh91"):
+            return "bz2"
+        return "tar"
+
+    def close(self):
+        self.fileobj.close()
+# class StreamProxy
+
+class _BZ2Proxy(object):
+    """Small proxy class that enables external file object
+       support for "r:bz2" and "w:bz2" modes. This is actually
+       a workaround for a limitation in bz2 module's BZ2File
+       class which (unlike gzip.GzipFile) has no support for
+       a file object argument.
+    """
+
+    blocksize = 16 * 1024
+
+    def __init__(self, fileobj, mode):
+        self.fileobj = fileobj
+        self.mode = mode
+        self.name = getattr(self.fileobj, "name", None)
+        self.init()
+
+    def init(self):
+        import bz2
+        self.pos = 0
+        if self.mode == "r":
+            self.bz2obj = bz2.BZ2Decompressor()
+            self.fileobj.seek(0)
+            self.buf = b""
+        else:
+            self.bz2obj = bz2.BZ2Compressor()
+
+    def read(self, size):
+        x = len(self.buf)
+        while x < size:
+            raw = self.fileobj.read(self.blocksize)
+            if not raw:
+                break
+            data = self.bz2obj.decompress(raw)
+            self.buf += data
+            x += len(data)
+
+        buf = self.buf[:size]
+        self.buf = self.buf[size:]
+        self.pos += len(buf)
+        return buf
+
+    def seek(self, pos):
+        if pos < self.pos:
+            self.init()
+        self.read(pos - self.pos)
+
+    def tell(self):
+        return self.pos
+
+    def write(self, data):
+        self.pos += len(data)
+        raw = self.bz2obj.compress(data)
+        self.fileobj.write(raw)
+
+    def close(self):
+        if self.mode == "w":
+            raw = self.bz2obj.flush()
+            self.fileobj.write(raw)
+# class _BZ2Proxy
+
+#------------------------
+# Extraction file object
+#------------------------
+class _FileInFile(object):
+    """A thin wrapper around an existing file object that
+       provides a part of its data as an individual file
+       object.
+    """
+
+    def __init__(self, fileobj, offset, size, blockinfo=None):
+        self.fileobj = fileobj
+        self.offset = offset
+        self.size = size
+        self.position = 0
+
+        if blockinfo is None:
+            blockinfo = [(0, size)]
+
+        # Construct a map with data and zero blocks.
+        self.map_index = 0
+        self.map = []
+        lastpos = 0
+        realpos = self.offset
+        for offset, size in blockinfo:
+            if offset > lastpos:
+                self.map.append((False, lastpos, offset, None))
+            self.map.append((True, offset, offset + size, realpos))
+            realpos += size
+            lastpos = offset + size
+        if lastpos < self.size:
+            self.map.append((False, lastpos, self.size, None))
+
+    def seekable(self):
+        if not hasattr(self.fileobj, "seekable"):
+            # XXX gzip.GzipFile and bz2.BZ2File
+            return True
+        return self.fileobj.seekable()
+
+    def tell(self):
+        """Return the current file position.
+        """
+        return self.position
+
+    def seek(self, position):
+        """Seek to a position in the file.
+        """
+        self.position = position
+
+    def read(self, size=None):
+        """Read data from the file.
+        """
+        if size is None:
+            size = self.size - self.position
+        else:
+            size = min(size, self.size - self.position)
+
+        buf = b""
+        while size > 0:
+            while True:
+                data, start, stop, offset = self.map[self.map_index]
+                if start <= self.position < stop:
+                    break
+                else:
+                    self.map_index += 1
+                    if self.map_index == len(self.map):
+                        self.map_index = 0
+            length = min(size, stop - self.position)
+            if data:
+                self.fileobj.seek(offset + (self.position - start))
+                buf += self.fileobj.read(length)
+            else:
+                buf += NUL * length
+            size -= length
+            self.position += length
+        return buf
+#class _FileInFile
+
+
+class ExFileObject(object):
+    """File-like object for reading an archive member.
+       Is returned by TarFile.extractfile().
+    """
+    blocksize = 1024
+
+    def __init__(self, tarfile, tarinfo):
+        self.fileobj = _FileInFile(tarfile.fileobj,
+                                   tarinfo.offset_data,
+                                   tarinfo.size,
+                                   tarinfo.sparse)
+        self.name = tarinfo.name
+        self.mode = "r"
+        self.closed = False
+        self.size = tarinfo.size
+
+        self.position = 0
+        self.buffer = b""
+
+    def readable(self):
+        return True
+
+    def writable(self):
+        return False
+
+    def seekable(self):
+        return self.fileobj.seekable()
+
+    def read(self, size=None):
+        """Read at most size bytes from the file. If size is not
+           present or None, read all data until EOF is reached.
+        """
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+
+        buf = b""
+        if self.buffer:
+            if size is None:
+                buf = self.buffer
+                self.buffer = b""
+            else:
+                buf = self.buffer[:size]
+                self.buffer = self.buffer[size:]
+
+        if size is None:
+            buf += self.fileobj.read()
+        else:
+            buf += self.fileobj.read(size - len(buf))
+
+        self.position += len(buf)
+        return buf
+
+    # XXX TextIOWrapper uses the read1() method.
+    read1 = read
+
+    def readline(self, size=-1):
+        """Read one entire line from the file. If size is present
+           and non-negative, return a string with at most that
+           size, which may be an incomplete line.
+        """
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+
+        pos = self.buffer.find(b"\n") + 1
+        if pos == 0:
+            # no newline found.
+            while True:
+                buf = self.fileobj.read(self.blocksize)
+                self.buffer += buf
+                if not buf or b"\n" in buf:
+                    pos = self.buffer.find(b"\n") + 1
+                    if pos == 0:
+                        # no newline found.
+                        pos = len(self.buffer)
+                    break
+
+        if size != -1:
+            pos = min(size, pos)
+
+        buf = self.buffer[:pos]
+        self.buffer = self.buffer[pos:]
+        self.position += len(buf)
+        return buf
+
+    def readlines(self):
+        """Return a list with all remaining lines.
+        """
+        result = []
+        while True:
+            line = self.readline()
+            if not line: break
+            result.append(line)
+        return result
+
+    def tell(self):
+        """Return the current file position.
+        """
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+
+        return self.position
+
+    def seek(self, pos, whence=os.SEEK_SET):
+        """Seek to a position in the file.
+        """
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+
+        if whence == os.SEEK_SET:
+            self.position = min(max(pos, 0), self.size)
+        elif whence == os.SEEK_CUR:
+            if pos < 0:
+                self.position = max(self.position + pos, 0)
+            else:
+                self.position = min(self.position + pos, self.size)
+        elif whence == os.SEEK_END:
+            self.position = max(min(self.size + pos, self.size), 0)
+        else:
+            raise ValueError("Invalid argument")
+
+        self.buffer = b""
+        self.fileobj.seek(self.position)
+
+    def close(self):
+        """Close the file object.
+        """
+        self.closed = True
+
+    def __iter__(self):
+        """Get an iterator over the file's lines.
+        """
+        while True:
+            line = self.readline()
+            if not line:
+                break
+            yield line
+#class ExFileObject
+
+#------------------
+# Exported Classes
+#------------------
+class TarInfo(object):
+    """Informational class which holds the details about an
+       archive member given by a tar header block.
+       TarInfo objects are returned by TarFile.getmember(),
+       TarFile.getmembers() and TarFile.gettarinfo() and are
+       usually created internally.
+    """
+
+    __slots__ = ("name", "mode", "uid", "gid", "size", "mtime",
+                 "chksum", "type", "linkname", "uname", "gname",
+                 "devmajor", "devminor",
+                 "offset", "offset_data", "pax_headers", "sparse",
+                 "tarfile", "_sparse_structs", "_link_target")
+
+    def __init__(self, name=""):
+        """Construct a TarInfo object. name is the optional name
+           of the member.
+        """
+        self.name = name        # member name
+        self.mode = 0o644       # file permissions
+        self.uid = 0            # user id
+        self.gid = 0            # group id
+        self.size = 0           # file size
+        self.mtime = 0          # modification time
+        self.chksum = 0         # header checksum
+        self.type = REGTYPE     # member type
+        self.linkname = ""      # link name
+        self.uname = ""         # user name
+        self.gname = ""         # group name
+        self.devmajor = 0       # device major number
+        self.devminor = 0       # device minor number
+
+        self.offset = 0         # the tar header starts here
+        self.offset_data = 0    # the file's data starts here
+
+        self.sparse = None      # sparse member information
+        self.pax_headers = {}   # pax header information
+
+    # In pax headers the "name" and "linkname" field are called
+    # "path" and "linkpath".
+    def _getpath(self):
+        return self.name
+    def _setpath(self, name):
+        self.name = name
+    path = property(_getpath, _setpath)
+
+    def _getlinkpath(self):
+        return self.linkname
+    def _setlinkpath(self, linkname):
+        self.linkname = linkname
+    linkpath = property(_getlinkpath, _setlinkpath)
+
+    def __repr__(self):
+        return "<%s %r at %#x>" % (self.__class__.__name__,self.name,id(self))
+
+    def get_info(self):
+        """Return the TarInfo's attributes as a dictionary.
+        """
+        info = {
+            "name":     self.name,
+            "mode":     self.mode & 0o7777,
+            "uid":      self.uid,
+            "gid":      self.gid,
+            "size":     self.size,
+            "mtime":    self.mtime,
+            "chksum":   self.chksum,
+            "type":     self.type,
+            "linkname": self.linkname,
+            "uname":    self.uname,
+            "gname":    self.gname,
+            "devmajor": self.devmajor,
+            "devminor": self.devminor
+        }
+
+        if info["type"] == DIRTYPE and not info["name"].endswith("/"):
+            info["name"] += "/"
+
+        return info
+
+    def tobuf(self, format=DEFAULT_FORMAT, encoding=ENCODING, errors="surrogateescape"):
+        """Return a tar header as a string of 512 byte blocks.
+        """
+        info = self.get_info()
+
+        if format == USTAR_FORMAT:
+            return self.create_ustar_header(info, encoding, errors)
+        elif format == GNU_FORMAT:
+            return self.create_gnu_header(info, encoding, errors)
+        elif format == PAX_FORMAT:
+            return self.create_pax_header(info, encoding)
+        else:
+            raise ValueError("invalid format")
+
+    def create_ustar_header(self, info, encoding, errors):
+        """Return the object as a ustar header block.
+        """
+        info["magic"] = POSIX_MAGIC
+
+        if len(info["linkname"]) > LENGTH_LINK:
+            raise ValueError("linkname is too long")
+
+        if len(info["name"]) > LENGTH_NAME:
+            info["prefix"], info["name"] = self._posix_split_name(info["name"])
+
+        return self._create_header(info, USTAR_FORMAT, encoding, errors)
+
+    def create_gnu_header(self, info, encoding, errors):
+        """Return the object as a GNU header block sequence.
+        """
+        info["magic"] = GNU_MAGIC
+
+        buf = b""
+        if len(info["linkname"]) > LENGTH_LINK:
+            buf += self._create_gnu_long_header(info["linkname"], GNUTYPE_LONGLINK, encoding, errors)
+
+        if len(info["name"]) > LENGTH_NAME:
+            buf += self._create_gnu_long_header(info["name"], GNUTYPE_LONGNAME, encoding, errors)
+
+        return buf + self._create_header(info, GNU_FORMAT, encoding, errors)
+
+    def create_pax_header(self, info, encoding):
+        """Return the object as a ustar header block. If it cannot be
+           represented this way, prepend a pax extended header sequence
+           with supplement information.
+        """
+        info["magic"] = POSIX_MAGIC
+        pax_headers = self.pax_headers.copy()
+
+        # Test string fields for values that exceed the field length or cannot
+        # be represented in ASCII encoding.
+        for name, hname, length in (
+                ("name", "path", LENGTH_NAME), ("linkname", "linkpath", LENGTH_LINK),
+                ("uname", "uname", 32), ("gname", "gname", 32)):
+
+            if hname in pax_headers:
+                # The pax header has priority.
+                continue
+
+            # Try to encode the string as ASCII.
+            try:
+                info[name].encode("ascii", "strict")
+            except UnicodeEncodeError:
+                pax_headers[hname] = info[name]
+                continue
+
+            if len(info[name]) > length:
+                pax_headers[hname] = info[name]
+
+        # Test number fields for values that exceed the field limit or values
+        # that like to be stored as float.
+        for name, digits in (("uid", 8), ("gid", 8), ("size", 12), ("mtime", 12)):
+            if name in pax_headers:
+                # The pax header has priority. Avoid overflow.
+                info[name] = 0
+                continue
+
+            val = info[name]
+            if not 0 <= val < 8 ** (digits - 1) or isinstance(val, float):
+                pax_headers[name] = str(val)
+                info[name] = 0
+
+        # Create a pax extended header if necessary.
+        if pax_headers:
+            buf = self._create_pax_generic_header(pax_headers, XHDTYPE, encoding)
+        else:
+            buf = b""
+
+        return buf + self._create_header(info, USTAR_FORMAT, "ascii", "replace")
+
+    @classmethod
+    def create_pax_global_header(cls, pax_headers):
+        """Return the object as a pax global header block sequence.
+        """
+        return cls._create_pax_generic_header(pax_headers, XGLTYPE, "utf8")
+
+    def _posix_split_name(self, name):
+        """Split a name longer than 100 chars into a prefix
+           and a name part.
+        """
+        prefix = name[:LENGTH_PREFIX + 1]
+        while prefix and prefix[-1] != "/":
+            prefix = prefix[:-1]
+
+        name = name[len(prefix):]
+        prefix = prefix[:-1]
+
+        if not prefix or len(name) > LENGTH_NAME:
+            raise ValueError("name is too long")
+        return prefix, name
+
+    @staticmethod
+    def _create_header(info, format, encoding, errors):
+        """Return a header block. info is a dictionary with file
+           information, format must be one of the *_FORMAT constants.
+        """
+        parts = [
+            stn(info.get("name", ""), 100, encoding, errors),
+            itn(info.get("mode", 0) & 0o7777, 8, format),
+            itn(info.get("uid", 0), 8, format),
+            itn(info.get("gid", 0), 8, format),
+            itn(info.get("size", 0), 12, format),
+            itn(info.get("mtime", 0), 12, format),
+            b"        ", # checksum field
+            info.get("type", REGTYPE),
+            stn(info.get("linkname", ""), 100, encoding, errors),
+            info.get("magic", POSIX_MAGIC),
+            stn(info.get("uname", ""), 32, encoding, errors),
+            stn(info.get("gname", ""), 32, encoding, errors),
+            itn(info.get("devmajor", 0), 8, format),
+            itn(info.get("devminor", 0), 8, format),
+            stn(info.get("prefix", ""), 155, encoding, errors)
+        ]
+
+        buf = struct.pack("%ds" % BLOCKSIZE, b"".join(parts))
+        chksum = calc_chksums(buf[-BLOCKSIZE:])[0]
+        buf = buf[:-364] + ("%06o\0" % chksum).encode("ascii") + buf[-357:]
+        return buf
+
+    @staticmethod
+    def _create_payload(payload):
+        """Return the string payload filled with zero bytes
+           up to the next 512 byte border.
+        """
+        blocks, remainder = divmod(len(payload), BLOCKSIZE)
+        if remainder > 0:
+            payload += (BLOCKSIZE - remainder) * NUL
+        return payload
+
+    @classmethod
+    def _create_gnu_long_header(cls, name, type, encoding, errors):
+        """Return a GNUTYPE_LONGNAME or GNUTYPE_LONGLINK sequence
+           for name.
+        """
+        name = name.encode(encoding, errors) + NUL
+
+        info = {}
+        info["name"] = "././@LongLink"
+        info["type"] = type
+        info["size"] = len(name)
+        info["magic"] = GNU_MAGIC
+
+        # create extended header + name blocks.
+        return cls._create_header(info, USTAR_FORMAT, encoding, errors) + \
+                cls._create_payload(name)
+
+    @classmethod
+    def _create_pax_generic_header(cls, pax_headers, type, encoding):
+        """Return a POSIX.1-2008 extended or global header sequence
+           that contains a list of keyword, value pairs. The values
+           must be strings.
+        """
+        # Check if one of the fields contains surrogate characters and thereby
+        # forces hdrcharset=BINARY, see _proc_pax() for more information.
+        binary = False
+        for keyword, value in pax_headers.items():
+            try:
+                value.encode("utf8", "strict")
+            except UnicodeEncodeError:
+                binary = True
+                break
+
+        records = b""
+        if binary:
+            # Put the hdrcharset field at the beginning of the header.
+            records += b"21 hdrcharset=BINARY\n"
+
+        for keyword, value in pax_headers.items():
+            keyword = keyword.encode("utf8")
+            if binary:
+                # Try to restore the original byte representation of `value'.
+                # Needless to say, that the encoding must match the string.
+                value = value.encode(encoding, "surrogateescape")
+            else:
+                value = value.encode("utf8")
+
+            l = len(keyword) + len(value) + 3   # ' ' + '=' + '\n'
+            n = p = 0
+            while True:
+                n = l + len(str(p))
+                if n == p:
+                    break
+                p = n
+            records += bytes(str(p), "ascii") + b" " + keyword + b"=" + value + b"\n"
+
+        # We use a hardcoded "././@PaxHeader" name like star does
+        # instead of the one that POSIX recommends.
+        info = {}
+        info["name"] = "././@PaxHeader"
+        info["type"] = type
+        info["size"] = len(records)
+        info["magic"] = POSIX_MAGIC
+
+        # Create pax header + record blocks.
+        return cls._create_header(info, USTAR_FORMAT, "ascii", "replace") + \
+                cls._create_payload(records)
+
+    @classmethod
+    def frombuf(cls, buf, encoding, errors):
+        """Construct a TarInfo object from a 512 byte bytes object.
+        """
+        if len(buf) == 0:
+            raise EmptyHeaderError("empty header")
+        if len(buf) != BLOCKSIZE:
+            raise TruncatedHeaderError("truncated header")
+        if buf.count(NUL) == BLOCKSIZE:
+            raise EOFHeaderError("end of file header")
+
+        chksum = nti(buf[148:156])
+        if chksum not in calc_chksums(buf):
+            raise InvalidHeaderError("bad checksum")
+
+        obj = cls()
+        obj.name = nts(buf[0:100], encoding, errors)
+        obj.mode = nti(buf[100:108])
+        obj.uid = nti(buf[108:116])
+        obj.gid = nti(buf[116:124])
+        obj.size = nti(buf[124:136])
+        obj.mtime = nti(buf[136:148])
+        obj.chksum = chksum
+        obj.type = buf[156:157]
+        obj.linkname = nts(buf[157:257], encoding, errors)
+        obj.uname = nts(buf[265:297], encoding, errors)
+        obj.gname = nts(buf[297:329], encoding, errors)
+        obj.devmajor = nti(buf[329:337])
+        obj.devminor = nti(buf[337:345])
+        prefix = nts(buf[345:500], encoding, errors)
+
+        # Old V7 tar format represents a directory as a regular
+        # file with a trailing slash.
+        if obj.type == AREGTYPE and obj.name.endswith("/"):
+            obj.type = DIRTYPE
+
+        # The old GNU sparse format occupies some of the unused
+        # space in the buffer for up to 4 sparse structures.
+        # Save the them for later processing in _proc_sparse().
+        if obj.type == GNUTYPE_SPARSE:
+            pos = 386
+            structs = []
+            for i in range(4):
+                try:
+                    offset = nti(buf[pos:pos + 12])
+                    numbytes = nti(buf[pos + 12:pos + 24])
+                except ValueError:
+                    break
+                structs.append((offset, numbytes))
+                pos += 24
+            isextended = bool(buf[482])
+            origsize = nti(buf[483:495])
+            obj._sparse_structs = (structs, isextended, origsize)
+
+        # Remove redundant slashes from directories.
+        if obj.isdir():
+            obj.name = obj.name.rstrip("/")
+
+        # Reconstruct a ustar longname.
+        if prefix and obj.type not in GNU_TYPES:
+            obj.name = prefix + "/" + obj.name
+        return obj
+
+    @classmethod
+    def fromtarfile(cls, tarfile):
+        """Return the next TarInfo object from TarFile object
+           tarfile.
+        """
+        buf = tarfile.fileobj.read(BLOCKSIZE)
+        obj = cls.frombuf(buf, tarfile.encoding, tarfile.errors)
+        obj.offset = tarfile.fileobj.tell() - BLOCKSIZE
+        return obj._proc_member(tarfile)
+
+    #--------------------------------------------------------------------------
+    # The following are methods that are called depending on the type of a
+    # member. The entry point is _proc_member() which can be overridden in a
+    # subclass to add custom _proc_*() methods. A _proc_*() method MUST
+    # implement the following
+    # operations:
+    # 1. Set self.offset_data to the position where the data blocks begin,
+    #    if there is data that follows.
+    # 2. Set tarfile.offset to the position where the next member's header will
+    #    begin.
+    # 3. Return self or another valid TarInfo object.
+    def _proc_member(self, tarfile):
+        """Choose the right processing method depending on
+           the type and call it.
+        """
+        if self.type in (GNUTYPE_LONGNAME, GNUTYPE_LONGLINK):
+            return self._proc_gnulong(tarfile)
+        elif self.type == GNUTYPE_SPARSE:
+            return self._proc_sparse(tarfile)
+        elif self.type in (XHDTYPE, XGLTYPE, SOLARIS_XHDTYPE):
+            return self._proc_pax(tarfile)
+        else:
+            return self._proc_builtin(tarfile)
+
+    def _proc_builtin(self, tarfile):
+        """Process a builtin type or an unknown type which
+           will be treated as a regular file.
+        """
+        self.offset_data = tarfile.fileobj.tell()
+        offset = self.offset_data
+        if self.isreg() or self.type not in SUPPORTED_TYPES:
+            # Skip the following data blocks.
+            offset += self._block(self.size)
+        tarfile.offset = offset
+
+        # Patch the TarInfo object with saved global
+        # header information.
+        self._apply_pax_info(tarfile.pax_headers, tarfile.encoding, tarfile.errors)
+
+        return self
+
+    def _proc_gnulong(self, tarfile):
+        """Process the blocks that hold a GNU longname
+           or longlink member.
+        """
+        buf = tarfile.fileobj.read(self._block(self.size))
+
+        # Fetch the next header and process it.
+        try:
+            next = self.fromtarfile(tarfile)
+        except HeaderError:
+            raise SubsequentHeaderError("missing or bad subsequent header")
+
+        # Patch the TarInfo object from the next header with
+        # the longname information.
+        next.offset = self.offset
+        if self.type == GNUTYPE_LONGNAME:
+            next.name = nts(buf, tarfile.encoding, tarfile.errors)
+        elif self.type == GNUTYPE_LONGLINK:
+            next.linkname = nts(buf, tarfile.encoding, tarfile.errors)
+
+        return next
+
+    def _proc_sparse(self, tarfile):
+        """Process a GNU sparse header plus extra headers.
+        """
+        # We already collected some sparse structures in frombuf().
+        structs, isextended, origsize = self._sparse_structs
+        del self._sparse_structs
+
+        # Collect sparse structures from extended header blocks.
+        while isextended:
+            buf = tarfile.fileobj.read(BLOCKSIZE)
+            pos = 0
+            for i in range(21):
+                try:
+                    offset = nti(buf[pos:pos + 12])
+                    numbytes = nti(buf[pos + 12:pos + 24])
+                except ValueError:
+                    break
+                if offset and numbytes:
+                    structs.append((offset, numbytes))
+                pos += 24
+            isextended = bool(buf[504])
+        self.sparse = structs
+
+        self.offset_data = tarfile.fileobj.tell()
+        tarfile.offset = self.offset_data + self._block(self.size)
+        self.size = origsize
+        return self
+
+    def _proc_pax(self, tarfile):
+        """Process an extended or global header as described in
+           POSIX.1-2008.
+        """
+        # Read the header information.
+        buf = tarfile.fileobj.read(self._block(self.size))
+
+        # A pax header stores supplemental information for either
+        # the following file (extended) or all following files
+        # (global).
+        if self.type == XGLTYPE:
+            pax_headers = tarfile.pax_headers
+        else:
+            pax_headers = tarfile.pax_headers.copy()
+
+        # Check if the pax header contains a hdrcharset field. This tells us
+        # the encoding of the path, linkpath, uname and gname fields. Normally,
+        # these fields are UTF-8 encoded but since POSIX.1-2008 tar
+        # implementations are allowed to store them as raw binary strings if
+        # the translation to UTF-8 fails.
+        match = re.search(br"\d+ hdrcharset=([^\n]+)\n", buf)
+        if match is not None:
+            pax_headers["hdrcharset"] = match.group(1).decode("utf8")
+
+        # For the time being, we don't care about anything other than "BINARY".
+        # The only other value that is currently allowed by the standard is
+        # "ISO-IR 10646 2000 UTF-8" in other words UTF-8.
+        hdrcharset = pax_headers.get("hdrcharset")
+        if hdrcharset == "BINARY":
+            encoding = tarfile.encoding
+        else:
+            encoding = "utf8"
+
+        # Parse pax header information. A record looks like that:
+        # "%d %s=%s\n" % (length, keyword, value). length is the size
+        # of the complete record including the length field itself and
+        # the newline. keyword and value are both UTF-8 encoded strings.
+        regex = re.compile(br"(\d+) ([^=]+)=")
+        pos = 0
+        while True:
+            match = regex.match(buf, pos)
+            if not match:
+                break
+
+            length, keyword = match.groups()
+            length = int(length)
+            value = buf[match.end(2) + 1:match.start(1) + length - 1]
+
+            # Normally, we could just use "utf8" as the encoding and "strict"
+            # as the error handler, but we better not take the risk. For
+            # example, GNU tar <= 1.23 is known to store filenames it cannot
+            # translate to UTF-8 as raw strings (unfortunately without a
+            # hdrcharset=BINARY header).
+            # We first try the strict standard encoding, and if that fails we
+            # fall back on the user's encoding and error handler.
+            keyword = self._decode_pax_field(keyword, "utf8", "utf8",
+                    tarfile.errors)
+            if keyword in PAX_NAME_FIELDS:
+                value = self._decode_pax_field(value, encoding, tarfile.encoding,
+                        tarfile.errors)
+            else:
+                value = self._decode_pax_field(value, "utf8", "utf8",
+                        tarfile.errors)
+
+            pax_headers[keyword] = value
+            pos += length
+
+        # Fetch the next header.
+        try:
+            next = self.fromtarfile(tarfile)
+        except HeaderError:
+            raise SubsequentHeaderError("missing or bad subsequent header")
+
+        # Process GNU sparse information.
+        if "GNU.sparse.map" in pax_headers:
+            # GNU extended sparse format version 0.1.
+            self._proc_gnusparse_01(next, pax_headers)
+
+        elif "GNU.sparse.size" in pax_headers:
+            # GNU extended sparse format version 0.0.
+            self._proc_gnusparse_00(next, pax_headers, buf)
+
+        elif pax_headers.get("GNU.sparse.major") == "1" and pax_headers.get("GNU.sparse.minor") == "0":
+            # GNU extended sparse format version 1.0.
+            self._proc_gnusparse_10(next, pax_headers, tarfile)
+
+        if self.type in (XHDTYPE, SOLARIS_XHDTYPE):
+            # Patch the TarInfo object with the extended header info.
+            next._apply_pax_info(pax_headers, tarfile.encoding, tarfile.errors)
+            next.offset = self.offset
+
+            if "size" in pax_headers:
+                # If the extended header replaces the size field,
+                # we need to recalculate the offset where the next
+                # header starts.
+                offset = next.offset_data
+                if next.isreg() or next.type not in SUPPORTED_TYPES:
+                    offset += next._block(next.size)
+                tarfile.offset = offset
+
+        return next
+
+    def _proc_gnusparse_00(self, next, pax_headers, buf):
+        """Process a GNU tar extended sparse header, version 0.0.
+        """
+        offsets = []
+        for match in re.finditer(br"\d+ GNU.sparse.offset=(\d+)\n", buf):
+            offsets.append(int(match.group(1)))
+        numbytes = []
+        for match in re.finditer(br"\d+ GNU.sparse.numbytes=(\d+)\n", buf):
+            numbytes.append(int(match.group(1)))
+        next.sparse = list(zip(offsets, numbytes))
+
+    def _proc_gnusparse_01(self, next, pax_headers):
+        """Process a GNU tar extended sparse header, version 0.1.
+        """
+        sparse = [int(x) for x in pax_headers["GNU.sparse.map"].split(",")]
+        next.sparse = list(zip(sparse[::2], sparse[1::2]))
+
+    def _proc_gnusparse_10(self, next, pax_headers, tarfile):
+        """Process a GNU tar extended sparse header, version 1.0.
+        """
+        fields = None
+        sparse = []
+        buf = tarfile.fileobj.read(BLOCKSIZE)
+        fields, buf = buf.split(b"\n", 1)
+        fields = int(fields)
+        while len(sparse) < fields * 2:
+            if b"\n" not in buf:
+                buf += tarfile.fileobj.read(BLOCKSIZE)
+            number, buf = buf.split(b"\n", 1)
+            sparse.append(int(number))
+        next.offset_data = tarfile.fileobj.tell()
+        next.sparse = list(zip(sparse[::2], sparse[1::2]))
+
+    def _apply_pax_info(self, pax_headers, encoding, errors):
+        """Replace fields with supplemental information from a previous
+           pax extended or global header.
+        """
+        for keyword, value in pax_headers.items():
+            if keyword == "GNU.sparse.name":
+                setattr(self, "path", value)
+            elif keyword == "GNU.sparse.size":
+                setattr(self, "size", int(value))
+            elif keyword == "GNU.sparse.realsize":
+                setattr(self, "size", int(value))
+            elif keyword in PAX_FIELDS:
+                if keyword in PAX_NUMBER_FIELDS:
+                    try:
+                        value = PAX_NUMBER_FIELDS[keyword](value)
+                    except ValueError:
+                        value = 0
+                if keyword == "path":
+                    value = value.rstrip("/")
+                setattr(self, keyword, value)
+
+        self.pax_headers = pax_headers.copy()
+
+    def _decode_pax_field(self, value, encoding, fallback_encoding, fallback_errors):
+        """Decode a single field from a pax record.
+        """
+        try:
+            return value.decode(encoding, "strict")
+        except UnicodeDecodeError:
+            return value.decode(fallback_encoding, fallback_errors)
+
+    def _block(self, count):
+        """Round up a byte count by BLOCKSIZE and return it,
+           e.g. _block(834) => 1024.
+        """
+        blocks, remainder = divmod(count, BLOCKSIZE)
+        if remainder:
+            blocks += 1
+        return blocks * BLOCKSIZE
+
+    def isreg(self):
+        return self.type in REGULAR_TYPES
+    def isfile(self):
+        return self.isreg()
+    def isdir(self):
+        return self.type == DIRTYPE
+    def issym(self):
+        return self.type == SYMTYPE
+    def islnk(self):
+        return self.type == LNKTYPE
+    def ischr(self):
+        return self.type == CHRTYPE
+    def isblk(self):
+        return self.type == BLKTYPE
+    def isfifo(self):
+        return self.type == FIFOTYPE
+    def issparse(self):
+        return self.sparse is not None
+    def isdev(self):
+        return self.type in (CHRTYPE, BLKTYPE, FIFOTYPE)
+# class TarInfo
+
+class TarFile(object):
+    """The TarFile Class provides an interface to tar archives.
+    """
+
+    debug = 0                   # May be set from 0 (no msgs) to 3 (all msgs)
+
+    dereference = False         # If true, add content of linked file to the
+                                # tar file, else the link.
+
+    ignore_zeros = False        # If true, skips empty or invalid blocks and
+                                # continues processing.
+
+    errorlevel = 1              # If 0, fatal errors only appear in debug
+                                # messages (if debug >= 0). If > 0, errors
+                                # are passed to the caller as exceptions.
+
+    format = DEFAULT_FORMAT     # The format to use when creating an archive.
+
+    encoding = ENCODING         # Encoding for 8-bit character strings.
+
+    errors = None               # Error handler for unicode conversion.
+
+    tarinfo = TarInfo           # The default TarInfo class to use.
+
+    fileobject = ExFileObject   # The default ExFileObject class to use.
+
+    def __init__(self, name=None, mode="r", fileobj=None, format=None,
+            tarinfo=None, dereference=None, ignore_zeros=None, encoding=None,
+            errors="surrogateescape", pax_headers=None, debug=None, errorlevel=None):
+        """Open an (uncompressed) tar archive `name'. `mode' is either 'r' to
+           read from an existing archive, 'a' to append data to an existing
+           file or 'w' to create a new file overwriting an existing one. `mode'
+           defaults to 'r'.
+           If `fileobj' is given, it is used for reading or writing data. If it
+           can be determined, `mode' is overridden by `fileobj's mode.
+           `fileobj' is not closed, when TarFile is closed.
+        """
+        if len(mode) > 1 or mode not in "raw":
+            raise ValueError("mode must be 'r', 'a' or 'w'")
+        self.mode = mode
+        self._mode = {"r": "rb", "a": "r+b", "w": "wb"}[mode]
+
+        if not fileobj:
+            if self.mode == "a" and not os.path.exists(name):
+                # Create nonexistent files in append mode.
+                self.mode = "w"
+                self._mode = "wb"
+            fileobj = bltn_open(name, self._mode)
+            self._extfileobj = False
+        else:
+            if name is None and hasattr(fileobj, "name"):
+                name = fileobj.name
+            if hasattr(fileobj, "mode"):
+                self._mode = fileobj.mode
+            self._extfileobj = True
+        self.name = os.path.abspath(name) if name else None
+        self.fileobj = fileobj
+
+        # Init attributes.
+        if format is not None:
+            self.format = format
+        if tarinfo is not None:
+            self.tarinfo = tarinfo
+        if dereference is not None:
+            self.dereference = dereference
+        if ignore_zeros is not None:
+            self.ignore_zeros = ignore_zeros
+        if encoding is not None:
+            self.encoding = encoding
+        self.errors = errors
+
+        if pax_headers is not None and self.format == PAX_FORMAT:
+            self.pax_headers = pax_headers
+        else:
+            self.pax_headers = {}
+
+        if debug is not None:
+            self.debug = debug
+        if errorlevel is not None:
+            self.errorlevel = errorlevel
+
+        # Init datastructures.
+        self.closed = False
+        self.members = []       # list of members as TarInfo objects
+        self._loaded = False    # flag if all members have been read
+        self.offset = self.fileobj.tell()
+                                # current position in the archive file
+        self.inodes = {}        # dictionary caching the inodes of
+                                # archive members already added
+
+        try:
+            if self.mode == "r":
+                self.firstmember = None
+                self.firstmember = self.next()
+
+            if self.mode == "a":
+                # Move to the end of the archive,
+                # before the first empty block.
+                while True:
+                    self.fileobj.seek(self.offset)
+                    try:
+                        tarinfo = self.tarinfo.fromtarfile(self)
+                        self.members.append(tarinfo)
+                    except EOFHeaderError:
+                        self.fileobj.seek(self.offset)
+                        break
+                    except HeaderError as e:
+                        raise ReadError(str(e))
+
+            if self.mode in "aw":
+                self._loaded = True
+
+                if self.pax_headers:
+                    buf = self.tarinfo.create_pax_global_header(self.pax_headers.copy())
+                    self.fileobj.write(buf)
+                    self.offset += len(buf)
+        except:
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
+            raise
+
+    #--------------------------------------------------------------------------
+    # Below are the classmethods which act as alternate constructors to the
+    # TarFile class. The open() method is the only one that is needed for
+    # public use; it is the "super"-constructor and is able to select an
+    # adequate "sub"-constructor for a particular compression using the mapping
+    # from OPEN_METH.
+    #
+    # This concept allows one to subclass TarFile without losing the comfort of
+    # the super-constructor. A sub-constructor is registered and made available
+    # by adding it to the mapping in OPEN_METH.
+
+    @classmethod
+    def open(cls, name=None, mode="r", fileobj=None, bufsize=RECORDSIZE, **kwargs):
+        """Open a tar archive for reading, writing or appending. Return
+           an appropriate TarFile class.
+
+           mode:
+           'r' or 'r:*' open for reading with transparent compression
+           'r:'         open for reading exclusively uncompressed
+           'r:gz'       open for reading with gzip compression
+           'r:bz2'      open for reading with bzip2 compression
+           'a' or 'a:'  open for appending, creating the file if necessary
+           'w' or 'w:'  open for writing without compression
+           'w:gz'       open for writing with gzip compression
+           'w:bz2'      open for writing with bzip2 compression
+
+           'r|*'        open a stream of tar blocks with transparent compression
+           'r|'         open an uncompressed stream of tar blocks for reading
+           'r|gz'       open a gzip compressed stream of tar blocks
+           'r|bz2'      open a bzip2 compressed stream of tar blocks
+           'w|'         open an uncompressed stream for writing
+           'w|gz'       open a gzip compressed stream for writing
+           'w|bz2'      open a bzip2 compressed stream for writing
+        """
+
+        if not name and not fileobj:
+            raise ValueError("nothing to open")
+
+        if mode in ("r", "r:*"):
+            # Find out which *open() is appropriate for opening the file.
+            for comptype in cls.OPEN_METH:
+                func = getattr(cls, cls.OPEN_METH[comptype])
+                if fileobj is not None:
+                    saved_pos = fileobj.tell()
+                try:
+                    return func(name, "r", fileobj, **kwargs)
+                except (ReadError, CompressionError) as e:
+                    if fileobj is not None:
+                        fileobj.seek(saved_pos)
+                    continue
+            raise ReadError("file could not be opened successfully")
+
+        elif ":" in mode:
+            filemode, comptype = mode.split(":", 1)
+            filemode = filemode or "r"
+            comptype = comptype or "tar"
+
+            # Select the *open() function according to
+            # given compression.
+            if comptype in cls.OPEN_METH:
+                func = getattr(cls, cls.OPEN_METH[comptype])
+            else:
+                raise CompressionError("unknown compression type %r" % comptype)
+            return func(name, filemode, fileobj, **kwargs)
+
+        elif "|" in mode:
+            filemode, comptype = mode.split("|", 1)
+            filemode = filemode or "r"
+            comptype = comptype or "tar"
+
+            if filemode not in "rw":
+                raise ValueError("mode must be 'r' or 'w'")
+
+            stream = _Stream(name, filemode, comptype, fileobj, bufsize)
+            try:
+                t = cls(name, filemode, stream, **kwargs)
+            except:
+                stream.close()
+                raise
+            t._extfileobj = False
+            return t
+
+        elif mode in "aw":
+            return cls.taropen(name, mode, fileobj, **kwargs)
+
+        raise ValueError("undiscernible mode")
+
+    @classmethod
+    def taropen(cls, name, mode="r", fileobj=None, **kwargs):
+        """Open uncompressed tar archive name for reading or writing.
+        """
+        if len(mode) > 1 or mode not in "raw":
+            raise ValueError("mode must be 'r', 'a' or 'w'")
+        return cls(name, mode, fileobj, **kwargs)
+
+    @classmethod
+    def gzopen(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
+        """Open gzip compressed tar archive name for reading or writing.
+           Appending is not allowed.
+        """
+        if len(mode) > 1 or mode not in "rw":
+            raise ValueError("mode must be 'r' or 'w'")
+
+        try:
+            import gzip
+            gzip.GzipFile
+        except (ImportError, AttributeError):
+            raise CompressionError("gzip module is not available")
+
+        extfileobj = fileobj is not None
+        try:
+            fileobj = gzip.GzipFile(name, mode + "b", compresslevel, fileobj)
+            t = cls.taropen(name, mode, fileobj, **kwargs)
+        except IOError:
+            if not extfileobj and fileobj is not None:
+                fileobj.close()
+            if fileobj is None:
+                raise
+            raise ReadError("not a gzip file")
+        except:
+            if not extfileobj and fileobj is not None:
+                fileobj.close()
+            raise
+        t._extfileobj = extfileobj
+        return t
+
+    @classmethod
+    def bz2open(cls, name, mode="r", fileobj=None, compresslevel=9, **kwargs):
+        """Open bzip2 compressed tar archive name for reading or writing.
+           Appending is not allowed.
+        """
+        if len(mode) > 1 or mode not in "rw":
+            raise ValueError("mode must be 'r' or 'w'.")
+
+        try:
+            import bz2
+        except ImportError:
+            raise CompressionError("bz2 module is not available")
+
+        if fileobj is not None:
+            fileobj = _BZ2Proxy(fileobj, mode)
+        else:
+            fileobj = bz2.BZ2File(name, mode, compresslevel=compresslevel)
+
+        try:
+            t = cls.taropen(name, mode, fileobj, **kwargs)
+        except (IOError, EOFError):
+            fileobj.close()
+            raise ReadError("not a bzip2 file")
+        t._extfileobj = False
+        return t
+
+    # All *open() methods are registered here.
+    OPEN_METH = {
+        "tar": "taropen",   # uncompressed tar
+        "gz":  "gzopen",    # gzip compressed tar
+        "bz2": "bz2open"    # bzip2 compressed tar
+    }
+
+    #--------------------------------------------------------------------------
+    # The public methods which TarFile provides:
+
+    def close(self):
+        """Close the TarFile. In write-mode, two finishing zero blocks are
+           appended to the archive.
+        """
+        if self.closed:
+            return
+
+        if self.mode in "aw":
+            self.fileobj.write(NUL * (BLOCKSIZE * 2))
+            self.offset += (BLOCKSIZE * 2)
+            # fill up the end with zero-blocks
+            # (like option -b20 for tar does)
+            blocks, remainder = divmod(self.offset, RECORDSIZE)
+            if remainder > 0:
+                self.fileobj.write(NUL * (RECORDSIZE - remainder))
+
+        if not self._extfileobj:
+            self.fileobj.close()
+        self.closed = True
+
+    def getmember(self, name):
+        """Return a TarInfo object for member `name'. If `name' can not be
+           found in the archive, KeyError is raised. If a member occurs more
+           than once in the archive, its last occurrence is assumed to be the
+           most up-to-date version.
+        """
+        tarinfo = self._getmember(name)
+        if tarinfo is None:
+            raise KeyError("filename %r not found" % name)
+        return tarinfo
+
+    def getmembers(self):
+        """Return the members of the archive as a list of TarInfo objects. The
+           list has the same order as the members in the archive.
+        """
+        self._check()
+        if not self._loaded:    # if we want to obtain a list of
+            self._load()        # all members, we first have to
+                                # scan the whole archive.
+        return self.members
+
+    def getnames(self):
+        """Return the members of the archive as a list of their names. It has
+           the same order as the list returned by getmembers().
+        """
+        return [tarinfo.name for tarinfo in self.getmembers()]
+
+    def gettarinfo(self, name=None, arcname=None, fileobj=None):
+        """Create a TarInfo object for either the file `name' or the file
+           object `fileobj' (using os.fstat on its file descriptor). You can
+           modify some of the TarInfo's attributes before you add it using
+           addfile(). If given, `arcname' specifies an alternative name for the
+           file in the archive.
+        """
+        self._check("aw")
+
+        # When fileobj is given, replace name by
+        # fileobj's real name.
+        if fileobj is not None:
+            name = fileobj.name
+
+        # Building the name of the member in the archive.
+        # Backward slashes are converted to forward slashes,
+        # Absolute paths are turned to relative paths.
+        if arcname is None:
+            arcname = name
+        drv, arcname = os.path.splitdrive(arcname)
+        arcname = arcname.replace(os.sep, "/")
+        arcname = arcname.lstrip("/")
+
+        # Now, fill the TarInfo object with
+        # information specific for the file.
+        tarinfo = self.tarinfo()
+        tarinfo.tarfile = self
+
+        # Use os.stat or os.lstat, depending on platform
+        # and if symlinks shall be resolved.
+        if fileobj is None:
+            if hasattr(os, "lstat") and not self.dereference:
+                statres = os.lstat(name)
+            else:
+                statres = os.stat(name)
+        else:
+            statres = os.fstat(fileobj.fileno())
+        linkname = ""
+
+        stmd = statres.st_mode
+        if stat.S_ISREG(stmd):
+            inode = (statres.st_ino, statres.st_dev)
+            if not self.dereference and statres.st_nlink > 1 and \
+                    inode in self.inodes and arcname != self.inodes[inode]:
+                # Is it a hardlink to an already
+                # archived file?
+                type = LNKTYPE
+                linkname = self.inodes[inode]
+            else:
+                # The inode is added only if its valid.
+                # For win32 it is always 0.
+                type = REGTYPE
+                if inode[0]:
+                    self.inodes[inode] = arcname
+        elif stat.S_ISDIR(stmd):
+            type = DIRTYPE
+        elif stat.S_ISFIFO(stmd):
+            type = FIFOTYPE
+        elif stat.S_ISLNK(stmd):
+            type = SYMTYPE
+            linkname = os.readlink(name)
+        elif stat.S_ISCHR(stmd):
+            type = CHRTYPE
+        elif stat.S_ISBLK(stmd):
+            type = BLKTYPE
+        else:
+            return None
+
+        # Fill the TarInfo object with all
+        # information we can get.
+        tarinfo.name = arcname
+        tarinfo.mode = stmd
+        tarinfo.uid = statres.st_uid
+        tarinfo.gid = statres.st_gid
+        if type == REGTYPE:
+            tarinfo.size = statres.st_size
+        else:
+            tarinfo.size = 0
+        tarinfo.mtime = statres.st_mtime
+        tarinfo.type = type
+        tarinfo.linkname = linkname
+        if pwd:
+            try:
+                tarinfo.uname = pwd.getpwuid(tarinfo.uid)[0]
+            except KeyError:
+                pass
+        if grp:
+            try:
+                tarinfo.gname = grp.getgrgid(tarinfo.gid)[0]
+            except KeyError:
+                pass
+
+        if type in (CHRTYPE, BLKTYPE):
+            if hasattr(os, "major") and hasattr(os, "minor"):
+                tarinfo.devmajor = os.major(statres.st_rdev)
+                tarinfo.devminor = os.minor(statres.st_rdev)
+        return tarinfo
+
+    def list(self, verbose=True):
+        """Print a table of contents to sys.stdout. If `verbose' is False, only
+           the names of the members are printed. If it is True, an `ls -l'-like
+           output is produced.
+        """
+        self._check()
+
+        for tarinfo in self:
+            if verbose:
+                print(filemode(tarinfo.mode), end=' ')
+                print("%s/%s" % (tarinfo.uname or tarinfo.uid,
+                                 tarinfo.gname or tarinfo.gid), end=' ')
+                if tarinfo.ischr() or tarinfo.isblk():
+                    print("%10s" % ("%d,%d" \
+                                    % (tarinfo.devmajor, tarinfo.devminor)), end=' ')
+                else:
+                    print("%10d" % tarinfo.size, end=' ')
+                print("%d-%02d-%02d %02d:%02d:%02d" \
+                      % time.localtime(tarinfo.mtime)[:6], end=' ')
+
+            print(tarinfo.name + ("/" if tarinfo.isdir() else ""), end=' ')
+
+            if verbose:
+                if tarinfo.issym():
+                    print("->", tarinfo.linkname, end=' ')
+                if tarinfo.islnk():
+                    print("link to", tarinfo.linkname, end=' ')
+            print()
+
+    def add(self, name, arcname=None, recursive=True, exclude=None, filter=None):
+        """Add the file `name' to the archive. `name' may be any type of file
+           (directory, fifo, symbolic link, etc.). If given, `arcname'
+           specifies an alternative name for the file in the archive.
+           Directories are added recursively by default. This can be avoided by
+           setting `recursive' to False. `exclude' is a function that should
+           return True for each filename to be excluded. `filter' is a function
+           that expects a TarInfo object argument and returns the changed
+           TarInfo object, if it returns None the TarInfo object will be
+           excluded from the archive.
+        """
+        self._check("aw")
+
+        if arcname is None:
+            arcname = name
+
+        # Exclude pathnames.
+        if exclude is not None:
+            import warnings
+            warnings.warn("use the filter argument instead",
+                    DeprecationWarning, 2)
+            if exclude(name):
+                self._dbg(2, "tarfile: Excluded %r" % name)
+                return
+
+        # Skip if somebody tries to archive the archive...
+        if self.name is not None and os.path.abspath(name) == self.name:
+            self._dbg(2, "tarfile: Skipped %r" % name)
+            return
+
+        self._dbg(1, name)
+
+        # Create a TarInfo object from the file.
+        tarinfo = self.gettarinfo(name, arcname)
+
+        if tarinfo is None:
+            self._dbg(1, "tarfile: Unsupported type %r" % name)
+            return
+
+        # Change or exclude the TarInfo object.
+        if filter is not None:
+            tarinfo = filter(tarinfo)
+            if tarinfo is None:
+                self._dbg(2, "tarfile: Excluded %r" % name)
+                return
+
+        # Append the tar header and data to the archive.
+        if tarinfo.isreg():
+            f = bltn_open(name, "rb")
+            self.addfile(tarinfo, f)
+            f.close()
+
+        elif tarinfo.isdir():
+            self.addfile(tarinfo)
+            if recursive:
+                for f in os.listdir(name):
+                    self.add(os.path.join(name, f), os.path.join(arcname, f),
+                            recursive, exclude, filter=filter)
+
+        else:
+            self.addfile(tarinfo)
+
+    def addfile(self, tarinfo, fileobj=None):
+        """Add the TarInfo object `tarinfo' to the archive. If `fileobj' is
+           given, tarinfo.size bytes are read from it and added to the archive.
+           You can create TarInfo objects using gettarinfo().
+           On Windows platforms, `fileobj' should always be opened with mode
+           'rb' to avoid irritation about the file size.
+        """
+        self._check("aw")
+
+        tarinfo = copy.copy(tarinfo)
+
+        buf = tarinfo.tobuf(self.format, self.encoding, self.errors)
+        self.fileobj.write(buf)
+        self.offset += len(buf)
+
+        # If there's data to follow, append it.
+        if fileobj is not None:
+            copyfileobj(fileobj, self.fileobj, tarinfo.size)
+            blocks, remainder = divmod(tarinfo.size, BLOCKSIZE)
+            if remainder > 0:
+                self.fileobj.write(NUL * (BLOCKSIZE - remainder))
+                blocks += 1
+            self.offset += blocks * BLOCKSIZE
+
+        self.members.append(tarinfo)
+
+    def extractall(self, path=".", members=None):
+        """Extract all members from the archive to the current working
+           directory and set owner, modification time and permissions on
+           directories afterwards. `path' specifies a different directory
+           to extract to. `members' is optional and must be a subset of the
+           list returned by getmembers().
+        """
+        directories = []
+
+        if members is None:
+            members = self
+
+        for tarinfo in members:
+            if tarinfo.isdir():
+                # Extract directories with a safe mode.
+                directories.append(tarinfo)
+                tarinfo = copy.copy(tarinfo)
+                tarinfo.mode = 0o700
+            # Do not set_attrs directories, as we will do that further down
+            self.extract(tarinfo, path, set_attrs=not tarinfo.isdir())
+
+        # Reverse sort directories.
+        directories.sort(key=lambda a: a.name)
+        directories.reverse()
+
+        # Set correct owner, mtime and filemode on directories.
+        for tarinfo in directories:
+            dirpath = os.path.join(path, tarinfo.name)
+            try:
+                self.chown(tarinfo, dirpath)
+                self.utime(tarinfo, dirpath)
+                self.chmod(tarinfo, dirpath)
+            except ExtractError as e:
+                if self.errorlevel > 1:
+                    raise
+                else:
+                    self._dbg(1, "tarfile: %s" % e)
+
+    def extract(self, member, path="", set_attrs=True):
+        """Extract a member from the archive to the current working directory,
+           using its full name. Its file information is extracted as accurately
+           as possible. `member' may be a filename or a TarInfo object. You can
+           specify a different directory using `path'. File attributes (owner,
+           mtime, mode) are set unless `set_attrs' is False.
+        """
+        self._check("r")
+
+        if isinstance(member, str):
+            tarinfo = self.getmember(member)
+        else:
+            tarinfo = member
+
+        # Prepare the link target for makelink().
+        if tarinfo.islnk():
+            tarinfo._link_target = os.path.join(path, tarinfo.linkname)
+
+        try:
+            self._extract_member(tarinfo, os.path.join(path, tarinfo.name),
+                                 set_attrs=set_attrs)
+        except EnvironmentError as e:
+            if self.errorlevel > 0:
+                raise
+            else:
+                if e.filename is None:
+                    self._dbg(1, "tarfile: %s" % e.strerror)
+                else:
+                    self._dbg(1, "tarfile: %s %r" % (e.strerror, e.filename))
+        except ExtractError as e:
+            if self.errorlevel > 1:
+                raise
+            else:
+                self._dbg(1, "tarfile: %s" % e)
+
+    def extractfile(self, member):
+        """Extract a member from the archive as a file object. `member' may be
+           a filename or a TarInfo object. If `member' is a regular file, a
+           file-like object is returned. If `member' is a link, a file-like
+           object is constructed from the link's target. If `member' is none of
+           the above, None is returned.
+           The file-like object is read-only and provides the following
+           methods: read(), readline(), readlines(), seek() and tell()
+        """
+        self._check("r")
+
+        if isinstance(member, str):
+            tarinfo = self.getmember(member)
+        else:
+            tarinfo = member
+
+        if tarinfo.isreg():
+            return self.fileobject(self, tarinfo)
+
+        elif tarinfo.type not in SUPPORTED_TYPES:
+            # If a member's type is unknown, it is treated as a
+            # regular file.
+            return self.fileobject(self, tarinfo)
+
+        elif tarinfo.islnk() or tarinfo.issym():
+            if isinstance(self.fileobj, _Stream):
+                # A small but ugly workaround for the case that someone tries
+                # to extract a (sym)link as a file-object from a non-seekable
+                # stream of tar blocks.
+                raise StreamError("cannot extract (sym)link as file object")
+            else:
+                # A (sym)link's file object is its target's file object.
+                return self.extractfile(self._find_link_target(tarinfo))
+        else:
+            # If there's no data associated with the member (directory, chrdev,
+            # blkdev, etc.), return None instead of a file object.
+            return None
+
+    def _extract_member(self, tarinfo, targetpath, set_attrs=True):
+        """Extract the TarInfo object tarinfo to a physical
+           file called targetpath.
+        """
+        # Fetch the TarInfo object for the given name
+        # and build the destination pathname, replacing
+        # forward slashes to platform specific separators.
+        targetpath = targetpath.rstrip("/")
+        targetpath = targetpath.replace("/", os.sep)
+
+        # Create all upper directories.
+        upperdirs = os.path.dirname(targetpath)
+        if upperdirs and not os.path.exists(upperdirs):
+            # Create directories that are not part of the archive with
+            # default permissions.
+            os.makedirs(upperdirs)
+
+        if tarinfo.islnk() or tarinfo.issym():
+            self._dbg(1, "%s -> %s" % (tarinfo.name, tarinfo.linkname))
+        else:
+            self._dbg(1, tarinfo.name)
+
+        if tarinfo.isreg():
+            self.makefile(tarinfo, targetpath)
+        elif tarinfo.isdir():
+            self.makedir(tarinfo, targetpath)
+        elif tarinfo.isfifo():
+            self.makefifo(tarinfo, targetpath)
+        elif tarinfo.ischr() or tarinfo.isblk():
+            self.makedev(tarinfo, targetpath)
+        elif tarinfo.islnk() or tarinfo.issym():
+            self.makelink(tarinfo, targetpath)
+        elif tarinfo.type not in SUPPORTED_TYPES:
+            self.makeunknown(tarinfo, targetpath)
+        else:
+            self.makefile(tarinfo, targetpath)
+
+        if set_attrs:
+            self.chown(tarinfo, targetpath)
+            if not tarinfo.issym():
+                self.chmod(tarinfo, targetpath)
+                self.utime(tarinfo, targetpath)
+
+    #--------------------------------------------------------------------------
+    # Below are the different file methods. They are called via
+    # _extract_member() when extract() is called. They can be replaced in a
+    # subclass to implement other functionality.
+
+    def makedir(self, tarinfo, targetpath):
+        """Make a directory called targetpath.
+        """
+        try:
+            # Use a safe mode for the directory, the real mode is set
+            # later in _extract_member().
+            os.mkdir(targetpath, 0o700)
+        except EnvironmentError as e:
+            if e.errno != errno.EEXIST:
+                raise
+
+    def makefile(self, tarinfo, targetpath):
+        """Make a file called targetpath.
+        """
+        source = self.fileobj
+        source.seek(tarinfo.offset_data)
+        target = bltn_open(targetpath, "wb")
+        if tarinfo.sparse is not None:
+            for offset, size in tarinfo.sparse:
+                target.seek(offset)
+                copyfileobj(source, target, size)
+        else:
+            copyfileobj(source, target, tarinfo.size)
+        target.seek(tarinfo.size)
+        target.truncate()
+        target.close()
+
+    def makeunknown(self, tarinfo, targetpath):
+        """Make a file from a TarInfo object with an unknown type
+           at targetpath.
+        """
+        self.makefile(tarinfo, targetpath)
+        self._dbg(1, "tarfile: Unknown file type %r, " \
+                     "extracted as regular file." % tarinfo.type)
+
+    def makefifo(self, tarinfo, targetpath):
+        """Make a fifo called targetpath.
+        """
+        if hasattr(os, "mkfifo"):
+            os.mkfifo(targetpath)
+        else:
+            raise ExtractError("fifo not supported by system")
+
+    def makedev(self, tarinfo, targetpath):
+        """Make a character or block device called targetpath.
+        """
+        if not hasattr(os, "mknod") or not hasattr(os, "makedev"):
+            raise ExtractError("special devices not supported by system")
+
+        mode = tarinfo.mode
+        if tarinfo.isblk():
+            mode |= stat.S_IFBLK
+        else:
+            mode |= stat.S_IFCHR
+
+        os.mknod(targetpath, mode,
+                 os.makedev(tarinfo.devmajor, tarinfo.devminor))
+
+    def makelink(self, tarinfo, targetpath):
+        """Make a (symbolic) link called targetpath. If it cannot be created
+          (platform limitation), we try to make a copy of the referenced file
+          instead of a link.
+        """
+        try:
+            # For systems that support symbolic and hard links.
+            if tarinfo.issym():
+                os.symlink(tarinfo.linkname, targetpath)
+            else:
+                # See extract().
+                if os.path.exists(tarinfo._link_target):
+                    os.link(tarinfo._link_target, targetpath)
+                else:
+                    self._extract_member(self._find_link_target(tarinfo),
+                                         targetpath)
+        except symlink_exception:
+            if tarinfo.issym():
+                linkpath = os.path.join(os.path.dirname(tarinfo.name),
+                                        tarinfo.linkname)
+            else:
+                linkpath = tarinfo.linkname
+        else:
+            try:
+                self._extract_member(self._find_link_target(tarinfo),
+                                     targetpath)
+            except KeyError:
+                raise ExtractError("unable to resolve link inside archive")
+
+    def chown(self, tarinfo, targetpath):
+        """Set owner of targetpath according to tarinfo.
+        """
+        if pwd and hasattr(os, "geteuid") and os.geteuid() == 0:
+            # We have to be root to do so.
+            try:
+                g = grp.getgrnam(tarinfo.gname)[2]
+            except KeyError:
+                g = tarinfo.gid
+            try:
+                u = pwd.getpwnam(tarinfo.uname)[2]
+            except KeyError:
+                u = tarinfo.uid
+            try:
+                if tarinfo.issym() and hasattr(os, "lchown"):
+                    os.lchown(targetpath, u, g)
+                else:
+                    if sys.platform != "os2emx":
+                        os.chown(targetpath, u, g)
+            except EnvironmentError as e:
+                raise ExtractError("could not change owner")
+
+    def chmod(self, tarinfo, targetpath):
+        """Set file permissions of targetpath according to tarinfo.
+        """
+        if hasattr(os, 'chmod'):
+            try:
+                os.chmod(targetpath, tarinfo.mode)
+            except EnvironmentError as e:
+                raise ExtractError("could not change mode")
+
+    def utime(self, tarinfo, targetpath):
+        """Set modification time of targetpath according to tarinfo.
+        """
+        if not hasattr(os, 'utime'):
+            return
+        try:
+            os.utime(targetpath, (tarinfo.mtime, tarinfo.mtime))
+        except EnvironmentError as e:
+            raise ExtractError("could not change modification time")
+
+    #--------------------------------------------------------------------------
+    def next(self):
+        """Return the next member of the archive as a TarInfo object, when
+           TarFile is opened for reading. Return None if there is no more
+           available.
+        """
+        self._check("ra")
+        if self.firstmember is not None:
+            m = self.firstmember
+            self.firstmember = None
+            return m
+
+        # Read the next block.
+        self.fileobj.seek(self.offset)
+        tarinfo = None
+        while True:
+            try:
+                tarinfo = self.tarinfo.fromtarfile(self)
+            except EOFHeaderError as e:
+                if self.ignore_zeros:
+                    self._dbg(2, "0x%X: %s" % (self.offset, e))
+                    self.offset += BLOCKSIZE
+                    continue
+            except InvalidHeaderError as e:
+                if self.ignore_zeros:
+                    self._dbg(2, "0x%X: %s" % (self.offset, e))
+                    self.offset += BLOCKSIZE
+                    continue
+                elif self.offset == 0:
+                    raise ReadError(str(e))
+            except EmptyHeaderError:
+                if self.offset == 0:
+                    raise ReadError("empty file")
+            except TruncatedHeaderError as e:
+                if self.offset == 0:
+                    raise ReadError(str(e))
+            except SubsequentHeaderError as e:
+                raise ReadError(str(e))
+            break
+
+        if tarinfo is not None:
+            self.members.append(tarinfo)
+        else:
+            self._loaded = True
+
+        return tarinfo
+
+    #--------------------------------------------------------------------------
+    # Little helper methods:
+
+    def _getmember(self, name, tarinfo=None, normalize=False):
+        """Find an archive member by name from bottom to top.
+           If tarinfo is given, it is used as the starting point.
+        """
+        # Ensure that all members have been loaded.
+        members = self.getmembers()
+
+        # Limit the member search list up to tarinfo.
+        if tarinfo is not None:
+            members = members[:members.index(tarinfo)]
+
+        if normalize:
+            name = os.path.normpath(name)
+
+        for member in reversed(members):
+            if normalize:
+                member_name = os.path.normpath(member.name)
+            else:
+                member_name = member.name
+
+            if name == member_name:
+                return member
+
+    def _load(self):
+        """Read through the entire archive file and look for readable
+           members.
+        """
+        while True:
+            tarinfo = self.next()
+            if tarinfo is None:
+                break
+        self._loaded = True
+
+    def _check(self, mode=None):
+        """Check if TarFile is still open, and if the operation's mode
+           corresponds to TarFile's mode.
+        """
+        if self.closed:
+            raise IOError("%s is closed" % self.__class__.__name__)
+        if mode is not None and self.mode not in mode:
+            raise IOError("bad operation for mode %r" % self.mode)
+
+    def _find_link_target(self, tarinfo):
+        """Find the target member of a symlink or hardlink member in the
+           archive.
+        """
+        if tarinfo.issym():
+            # Always search the entire archive.
+            linkname = os.path.dirname(tarinfo.name) + "/" + tarinfo.linkname
+            limit = None
+        else:
+            # Search the archive before the link, because a hard link is
+            # just a reference to an already archived file.
+            linkname = tarinfo.linkname
+            limit = tarinfo
+
+        member = self._getmember(linkname, tarinfo=limit, normalize=True)
+        if member is None:
+            raise KeyError("linkname %r not found" % linkname)
+        return member
+
+    def __iter__(self):
+        """Provide an iterator object.
+        """
+        if self._loaded:
+            return iter(self.members)
+        else:
+            return TarIter(self)
+
+    def _dbg(self, level, msg):
+        """Write debugging output to sys.stderr.
+        """
+        if level <= self.debug:
+            print(msg, file=sys.stderr)
+
+    def __enter__(self):
+        self._check()
+        return self
+
+    def __exit__(self, type, value, traceback):
+        if type is None:
+            self.close()
+        else:
+            # An exception occurred. We must not call close() because
+            # it would try to write end-of-archive blocks and padding.
+            if not self._extfileobj:
+                self.fileobj.close()
+            self.closed = True
+# class TarFile
+
+class TarIter(object):
+    """Iterator Class.
+
+       for tarinfo in TarFile(...):
+           suite...
+    """
+
+    def __init__(self, tarfile):
+        """Construct a TarIter object.
+        """
+        self.tarfile = tarfile
+        self.index = 0
+    def __iter__(self):
+        """Return iterator object.
+        """
+        return self
+
+    def __next__(self):
+        """Return the next item using TarFile's next() method.
+           When all members have been read, set TarFile as _loaded.
+        """
+        # Fix for SF #1100429: Under rare circumstances it can
+        # happen that getmembers() is called during iteration,
+        # which will cause TarIter to stop prematurely.
+        if not self.tarfile._loaded:
+            tarinfo = self.tarfile.next()
+            if not tarinfo:
+                self.tarfile._loaded = True
+                raise StopIteration
+        else:
+            try:
+                tarinfo = self.tarfile.members[self.index]
+            except IndexError:
+                raise StopIteration
+        self.index += 1
+        return tarinfo
+
+    next = __next__ # for Python 2.x
+
+#--------------------
+# exported functions
+#--------------------
+def is_tarfile(name):
+    """Return True if name points to a tar archive that we
+       are able to handle, else return False.
+    """
+    try:
+        t = open(name)
+        t.close()
+        return True
+    except TarError:
+        return False
+
+bltn_open = open
+open = TarFile.open
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/compat.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/compat.py
new file mode 100644
index 0000000..c316fd9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/compat.py
@@ -0,0 +1,1120 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from __future__ import absolute_import
+
+import os
+import re
+import sys
+
+try:
+    import ssl
+except ImportError:  # pragma: no cover
+    ssl = None
+
+if sys.version_info[0] < 3:  # pragma: no cover
+    from StringIO import StringIO
+    string_types = basestring,
+    text_type = unicode
+    from types import FileType as file_type
+    import __builtin__ as builtins
+    import ConfigParser as configparser
+    from ._backport import shutil
+    from urlparse import urlparse, urlunparse, urljoin, urlsplit, urlunsplit
+    from urllib import (urlretrieve, quote as _quote, unquote, url2pathname,
+                        pathname2url, ContentTooShortError, splittype)
+
+    def quote(s):
+        if isinstance(s, unicode):
+            s = s.encode('utf-8')
+        return _quote(s)
+
+    import urllib2
+    from urllib2 import (Request, urlopen, URLError, HTTPError,
+                         HTTPBasicAuthHandler, HTTPPasswordMgr,
+                         HTTPHandler, HTTPRedirectHandler,
+                         build_opener)
+    if ssl:
+        from urllib2 import HTTPSHandler
+    import httplib
+    import xmlrpclib
+    import Queue as queue
+    from HTMLParser import HTMLParser
+    import htmlentitydefs
+    raw_input = raw_input
+    from itertools import ifilter as filter
+    from itertools import ifilterfalse as filterfalse
+
+    _userprog = None
+    def splituser(host):
+        """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
+        global _userprog
+        if _userprog is None:
+            import re
+            _userprog = re.compile('^(.*)@(.*)$')
+
+        match = _userprog.match(host)
+        if match: return match.group(1, 2)
+        return None, host
+
+else:  # pragma: no cover
+    from io import StringIO
+    string_types = str,
+    text_type = str
+    from io import TextIOWrapper as file_type
+    import builtins
+    import configparser
+    import shutil
+    from urllib.parse import (urlparse, urlunparse, urljoin, splituser, quote,
+                              unquote, urlsplit, urlunsplit, splittype)
+    from urllib.request import (urlopen, urlretrieve, Request, url2pathname,
+                                pathname2url,
+                                HTTPBasicAuthHandler, HTTPPasswordMgr,
+                                HTTPHandler, HTTPRedirectHandler,
+                                build_opener)
+    if ssl:
+        from urllib.request import HTTPSHandler
+    from urllib.error import HTTPError, URLError, ContentTooShortError
+    import http.client as httplib
+    import urllib.request as urllib2
+    import xmlrpc.client as xmlrpclib
+    import queue
+    from html.parser import HTMLParser
+    import html.entities as htmlentitydefs
+    raw_input = input
+    from itertools import filterfalse
+    filter = filter
+
+try:
+    from ssl import match_hostname, CertificateError
+except ImportError: # pragma: no cover
+    class CertificateError(ValueError):
+        pass
+
+
+    def _dnsname_match(dn, hostname, max_wildcards=1):
+        """Matching according to RFC 6125, section 6.4.3
+
+        http://tools.ietf.org/html/rfc6125#section-6.4.3
+        """
+        pats = []
+        if not dn:
+            return False
+
+        parts = dn.split('.')
+        leftmost, remainder = parts[0], parts[1:]
+
+        wildcards = leftmost.count('*')
+        if wildcards > max_wildcards:
+            # Issue #17980: avoid denials of service by refusing more
+            # than one wildcard per fragment.  A survey of established
+            # policy among SSL implementations showed it to be a
+            # reasonable choice.
+            raise CertificateError(
+                "too many wildcards in certificate DNS name: " + repr(dn))
+
+        # speed up common case w/o wildcards
+        if not wildcards:
+            return dn.lower() == hostname.lower()
+
+        # RFC 6125, section 6.4.3, subitem 1.
+        # The client SHOULD NOT attempt to match a presented identifier in which
+        # the wildcard character comprises a label other than the left-most label.
+        if leftmost == '*':
+            # When '*' is a fragment by itself, it matches a non-empty dotless
+            # fragment.
+            pats.append('[^.]+')
+        elif leftmost.startswith('xn--') or hostname.startswith('xn--'):
+            # RFC 6125, section 6.4.3, subitem 3.
+            # The client SHOULD NOT attempt to match a presented identifier
+            # where the wildcard character is embedded within an A-label or
+            # U-label of an internationalized domain name.
+            pats.append(re.escape(leftmost))
+        else:
+            # Otherwise, '*' matches any dotless string, e.g. www*
+            pats.append(re.escape(leftmost).replace(r'\*', '[^.]*'))
+
+        # add the remaining fragments, ignore any wildcards
+        for frag in remainder:
+            pats.append(re.escape(frag))
+
+        pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
+        return pat.match(hostname)
+
+
+    def match_hostname(cert, hostname):
+        """Verify that *cert* (in decoded format as returned by
+        SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
+        rules are followed, but IP addresses are not accepted for *hostname*.
+
+        CertificateError is raised on failure. On success, the function
+        returns nothing.
+        """
+        if not cert:
+            raise ValueError("empty or no certificate, match_hostname needs a "
+                             "SSL socket or SSL context with either "
+                             "CERT_OPTIONAL or CERT_REQUIRED")
+        dnsnames = []
+        san = cert.get('subjectAltName', ())
+        for key, value in san:
+            if key == 'DNS':
+                if _dnsname_match(value, hostname):
+                    return
+                dnsnames.append(value)
+        if not dnsnames:
+            # The subject is only checked when there is no dNSName entry
+            # in subjectAltName
+            for sub in cert.get('subject', ()):
+                for key, value in sub:
+                    # XXX according to RFC 2818, the most specific Common Name
+                    # must be used.
+                    if key == 'commonName':
+                        if _dnsname_match(value, hostname):
+                            return
+                        dnsnames.append(value)
+        if len(dnsnames) > 1:
+            raise CertificateError("hostname %r "
+                "doesn't match either of %s"
+                % (hostname, ', '.join(map(repr, dnsnames))))
+        elif len(dnsnames) == 1:
+            raise CertificateError("hostname %r "
+                "doesn't match %r"
+                % (hostname, dnsnames[0]))
+        else:
+            raise CertificateError("no appropriate commonName or "
+                "subjectAltName fields were found")
+
+
+try:
+    from types import SimpleNamespace as Container
+except ImportError:  # pragma: no cover
+    class Container(object):
+        """
+        A generic container for when multiple values need to be returned
+        """
+        def __init__(self, **kwargs):
+            self.__dict__.update(kwargs)
+
+
+try:
+    from shutil import which
+except ImportError:  # pragma: no cover
+    # Implementation from Python 3.3
+    def which(cmd, mode=os.F_OK | os.X_OK, path=None):
+        """Given a command, mode, and a PATH string, return the path which
+        conforms to the given mode on the PATH, or None if there is no such
+        file.
+
+        `mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result
+        of os.environ.get("PATH"), or can be overridden with a custom search
+        path.
+
+        """
+        # Check that a given file can be accessed with the correct mode.
+        # Additionally check that `file` is not a directory, as on Windows
+        # directories pass the os.access check.
+        def _access_check(fn, mode):
+            return (os.path.exists(fn) and os.access(fn, mode)
+                    and not os.path.isdir(fn))
+
+        # If we're given a path with a directory part, look it up directly rather
+        # than referring to PATH directories. This includes checking relative to the
+        # current directory, e.g. ./script
+        if os.path.dirname(cmd):
+            if _access_check(cmd, mode):
+                return cmd
+            return None
+
+        if path is None:
+            path = os.environ.get("PATH", os.defpath)
+        if not path:
+            return None
+        path = path.split(os.pathsep)
+
+        if sys.platform == "win32":
+            # The current directory takes precedence on Windows.
+            if not os.curdir in path:
+                path.insert(0, os.curdir)
+
+            # PATHEXT is necessary to check on Windows.
+            pathext = os.environ.get("PATHEXT", "").split(os.pathsep)
+            # See if the given file matches any of the expected path extensions.
+            # This will allow us to short circuit when given "python.exe".
+            # If it does match, only test that one, otherwise we have to try
+            # others.
+            if any(cmd.lower().endswith(ext.lower()) for ext in pathext):
+                files = [cmd]
+            else:
+                files = [cmd + ext for ext in pathext]
+        else:
+            # On other platforms you don't have things like PATHEXT to tell you
+            # what file suffixes are executable, so just pass on cmd as-is.
+            files = [cmd]
+
+        seen = set()
+        for dir in path:
+            normdir = os.path.normcase(dir)
+            if not normdir in seen:
+                seen.add(normdir)
+                for thefile in files:
+                    name = os.path.join(dir, thefile)
+                    if _access_check(name, mode):
+                        return name
+        return None
+
+
+# ZipFile is a context manager in 2.7, but not in 2.6
+
+from zipfile import ZipFile as BaseZipFile
+
+if hasattr(BaseZipFile, '__enter__'):  # pragma: no cover
+    ZipFile = BaseZipFile
+else:  # pragma: no cover
+    from zipfile import ZipExtFile as BaseZipExtFile
+
+    class ZipExtFile(BaseZipExtFile):
+        def __init__(self, base):
+            self.__dict__.update(base.__dict__)
+
+        def __enter__(self):
+            return self
+
+        def __exit__(self, *exc_info):
+            self.close()
+            # return None, so if an exception occurred, it will propagate
+
+    class ZipFile(BaseZipFile):
+        def __enter__(self):
+            return self
+
+        def __exit__(self, *exc_info):
+            self.close()
+            # return None, so if an exception occurred, it will propagate
+
+        def open(self, *args, **kwargs):
+            base = BaseZipFile.open(self, *args, **kwargs)
+            return ZipExtFile(base)
+
+try:
+    from platform import python_implementation
+except ImportError: # pragma: no cover
+    def python_implementation():
+        """Return a string identifying the Python implementation."""
+        if 'PyPy' in sys.version:
+            return 'PyPy'
+        if os.name == 'java':
+            return 'Jython'
+        if sys.version.startswith('IronPython'):
+            return 'IronPython'
+        return 'CPython'
+
+try:
+    import sysconfig
+except ImportError: # pragma: no cover
+    from ._backport import sysconfig
+
+try:
+    callable = callable
+except NameError:   # pragma: no cover
+    from collections.abc import Callable
+
+    def callable(obj):
+        return isinstance(obj, Callable)
+
+
+try:
+    fsencode = os.fsencode
+    fsdecode = os.fsdecode
+except AttributeError:  # pragma: no cover
+    # Issue #99: on some systems (e.g. containerised),
+    # sys.getfilesystemencoding() returns None, and we need a real value,
+    # so fall back to utf-8. From the CPython 2.7 docs relating to Unix and
+    # sys.getfilesystemencoding(): the return value is "the user’s preference
+    # according to the result of nl_langinfo(CODESET), or None if the
+    # nl_langinfo(CODESET) failed."
+    _fsencoding = sys.getfilesystemencoding() or 'utf-8'
+    if _fsencoding == 'mbcs':
+        _fserrors = 'strict'
+    else:
+        _fserrors = 'surrogateescape'
+
+    def fsencode(filename):
+        if isinstance(filename, bytes):
+            return filename
+        elif isinstance(filename, text_type):
+            return filename.encode(_fsencoding, _fserrors)
+        else:
+            raise TypeError("expect bytes or str, not %s" %
+                            type(filename).__name__)
+
+    def fsdecode(filename):
+        if isinstance(filename, text_type):
+            return filename
+        elif isinstance(filename, bytes):
+            return filename.decode(_fsencoding, _fserrors)
+        else:
+            raise TypeError("expect bytes or str, not %s" %
+                            type(filename).__name__)
+
+try:
+    from tokenize import detect_encoding
+except ImportError: # pragma: no cover
+    from codecs import BOM_UTF8, lookup
+    import re
+
+    cookie_re = re.compile(r"coding[:=]\s*([-\w.]+)")
+
+    def _get_normal_name(orig_enc):
+        """Imitates get_normal_name in tokenizer.c."""
+        # Only care about the first 12 characters.
+        enc = orig_enc[:12].lower().replace("_", "-")
+        if enc == "utf-8" or enc.startswith("utf-8-"):
+            return "utf-8"
+        if enc in ("latin-1", "iso-8859-1", "iso-latin-1") or \
+           enc.startswith(("latin-1-", "iso-8859-1-", "iso-latin-1-")):
+            return "iso-8859-1"
+        return orig_enc
+
+    def detect_encoding(readline):
+        """
+        The detect_encoding() function is used to detect the encoding that should
+        be used to decode a Python source file.  It requires one argument, readline,
+        in the same way as the tokenize() generator.
+
+        It will call readline a maximum of twice, and return the encoding used
+        (as a string) and a list of any lines (left as bytes) it has read in.
+
+        It detects the encoding from the presence of a utf-8 bom or an encoding
+        cookie as specified in pep-0263.  If both a bom and a cookie are present,
+        but disagree, a SyntaxError will be raised.  If the encoding cookie is an
+        invalid charset, raise a SyntaxError.  Note that if a utf-8 bom is found,
+        'utf-8-sig' is returned.
+
+        If no encoding is specified, then the default of 'utf-8' will be returned.
+        """
+        try:
+            filename = readline.__self__.name
+        except AttributeError:
+            filename = None
+        bom_found = False
+        encoding = None
+        default = 'utf-8'
+        def read_or_stop():
+            try:
+                return readline()
+            except StopIteration:
+                return b''
+
+        def find_cookie(line):
+            try:
+                # Decode as UTF-8. Either the line is an encoding declaration,
+                # in which case it should be pure ASCII, or it must be UTF-8
+                # per default encoding.
+                line_string = line.decode('utf-8')
+            except UnicodeDecodeError:
+                msg = "invalid or missing encoding declaration"
+                if filename is not None:
+                    msg = '{} for {!r}'.format(msg, filename)
+                raise SyntaxError(msg)
+
+            matches = cookie_re.findall(line_string)
+            if not matches:
+                return None
+            encoding = _get_normal_name(matches[0])
+            try:
+                codec = lookup(encoding)
+            except LookupError:
+                # This behaviour mimics the Python interpreter
+                if filename is None:
+                    msg = "unknown encoding: " + encoding
+                else:
+                    msg = "unknown encoding for {!r}: {}".format(filename,
+                            encoding)
+                raise SyntaxError(msg)
+
+            if bom_found:
+                if codec.name != 'utf-8':
+                    # This behaviour mimics the Python interpreter
+                    if filename is None:
+                        msg = 'encoding problem: utf-8'
+                    else:
+                        msg = 'encoding problem for {!r}: utf-8'.format(filename)
+                    raise SyntaxError(msg)
+                encoding += '-sig'
+            return encoding
+
+        first = read_or_stop()
+        if first.startswith(BOM_UTF8):
+            bom_found = True
+            first = first[3:]
+            default = 'utf-8-sig'
+        if not first:
+            return default, []
+
+        encoding = find_cookie(first)
+        if encoding:
+            return encoding, [first]
+
+        second = read_or_stop()
+        if not second:
+            return default, [first]
+
+        encoding = find_cookie(second)
+        if encoding:
+            return encoding, [first, second]
+
+        return default, [first, second]
+
+# For converting & <-> &amp; etc.
+try:
+    from html import escape
+except ImportError:
+    from cgi import escape
+if sys.version_info[:2] < (3, 4):
+    unescape = HTMLParser().unescape
+else:
+    from html import unescape
+
+try:
+    from collections import ChainMap
+except ImportError: # pragma: no cover
+    from collections import MutableMapping
+
+    try:
+        from reprlib import recursive_repr as _recursive_repr
+    except ImportError:
+        def _recursive_repr(fillvalue='...'):
+            '''
+            Decorator to make a repr function return fillvalue for a recursive
+            call
+            '''
+
+            def decorating_function(user_function):
+                repr_running = set()
+
+                def wrapper(self):
+                    key = id(self), get_ident()
+                    if key in repr_running:
+                        return fillvalue
+                    repr_running.add(key)
+                    try:
+                        result = user_function(self)
+                    finally:
+                        repr_running.discard(key)
+                    return result
+
+                # Can't use functools.wraps() here because of bootstrap issues
+                wrapper.__module__ = getattr(user_function, '__module__')
+                wrapper.__doc__ = getattr(user_function, '__doc__')
+                wrapper.__name__ = getattr(user_function, '__name__')
+                wrapper.__annotations__ = getattr(user_function, '__annotations__', {})
+                return wrapper
+
+            return decorating_function
+
+    class ChainMap(MutableMapping):
+        ''' A ChainMap groups multiple dicts (or other mappings) together
+        to create a single, updateable view.
+
+        The underlying mappings are stored in a list.  That list is public and can
+        accessed or updated using the *maps* attribute.  There is no other state.
+
+        Lookups search the underlying mappings successively until a key is found.
+        In contrast, writes, updates, and deletions only operate on the first
+        mapping.
+
+        '''
+
+        def __init__(self, *maps):
+            '''Initialize a ChainMap by setting *maps* to the given mappings.
+            If no mappings are provided, a single empty dictionary is used.
+
+            '''
+            self.maps = list(maps) or [{}]          # always at least one map
+
+        def __missing__(self, key):
+            raise KeyError(key)
+
+        def __getitem__(self, key):
+            for mapping in self.maps:
+                try:
+                    return mapping[key]             # can't use 'key in mapping' with defaultdict
+                except KeyError:
+                    pass
+            return self.__missing__(key)            # support subclasses that define __missing__
+
+        def get(self, key, default=None):
+            return self[key] if key in self else default
+
+        def __len__(self):
+            return len(set().union(*self.maps))     # reuses stored hash values if possible
+
+        def __iter__(self):
+            return iter(set().union(*self.maps))
+
+        def __contains__(self, key):
+            return any(key in m for m in self.maps)
+
+        def __bool__(self):
+            return any(self.maps)
+
+        @_recursive_repr()
+        def __repr__(self):
+            return '{0.__class__.__name__}({1})'.format(
+                self, ', '.join(map(repr, self.maps)))
+
+        @classmethod
+        def fromkeys(cls, iterable, *args):
+            'Create a ChainMap with a single dict created from the iterable.'
+            return cls(dict.fromkeys(iterable, *args))
+
+        def copy(self):
+            'New ChainMap or subclass with a new copy of maps[0] and refs to maps[1:]'
+            return self.__class__(self.maps[0].copy(), *self.maps[1:])
+
+        __copy__ = copy
+
+        def new_child(self):                        # like Django's Context.push()
+            'New ChainMap with a new dict followed by all previous maps.'
+            return self.__class__({}, *self.maps)
+
+        @property
+        def parents(self):                          # like Django's Context.pop()
+            'New ChainMap from maps[1:].'
+            return self.__class__(*self.maps[1:])
+
+        def __setitem__(self, key, value):
+            self.maps[0][key] = value
+
+        def __delitem__(self, key):
+            try:
+                del self.maps[0][key]
+            except KeyError:
+                raise KeyError('Key not found in the first mapping: {!r}'.format(key))
+
+        def popitem(self):
+            'Remove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty.'
+            try:
+                return self.maps[0].popitem()
+            except KeyError:
+                raise KeyError('No keys found in the first mapping.')
+
+        def pop(self, key, *args):
+            'Remove *key* from maps[0] and return its value. Raise KeyError if *key* not in maps[0].'
+            try:
+                return self.maps[0].pop(key, *args)
+            except KeyError:
+                raise KeyError('Key not found in the first mapping: {!r}'.format(key))
+
+        def clear(self):
+            'Clear maps[0], leaving maps[1:] intact.'
+            self.maps[0].clear()
+
+try:
+    from importlib.util import cache_from_source  # Python >= 3.4
+except ImportError:  # pragma: no cover
+    try:
+        from imp import cache_from_source
+    except ImportError:  # pragma: no cover
+        def cache_from_source(path, debug_override=None):
+            assert path.endswith('.py')
+            if debug_override is None:
+                debug_override = __debug__
+            if debug_override:
+                suffix = 'c'
+            else:
+                suffix = 'o'
+            return path + suffix
+
+try:
+    from collections import OrderedDict
+except ImportError: # pragma: no cover
+## {{{ http://code.activestate.com/recipes/576693/ (r9)
+# Backport of OrderedDict() class that runs on Python 2.4, 2.5, 2.6, 2.7 and pypy.
+# Passes Python2.7's test suite and incorporates all the latest updates.
+    try:
+        from thread import get_ident as _get_ident
+    except ImportError:
+        from dummy_thread import get_ident as _get_ident
+
+    try:
+        from _abcoll import KeysView, ValuesView, ItemsView
+    except ImportError:
+        pass
+
+
+    class OrderedDict(dict):
+        'Dictionary that remembers insertion order'
+        # An inherited dict maps keys to values.
+        # The inherited dict provides __getitem__, __len__, __contains__, and get.
+        # The remaining methods are order-aware.
+        # Big-O running times for all methods are the same as for regular dictionaries.
+
+        # The internal self.__map dictionary maps keys to links in a doubly linked list.
+        # The circular doubly linked list starts and ends with a sentinel element.
+        # The sentinel element never gets deleted (this simplifies the algorithm).
+        # Each link is stored as a list of length three:  [PREV, NEXT, KEY].
+
+        def __init__(self, *args, **kwds):
+            '''Initialize an ordered dictionary.  Signature is the same as for
+            regular dictionaries, but keyword arguments are not recommended
+            because their insertion order is arbitrary.
+
+            '''
+            if len(args) > 1:
+                raise TypeError('expected at most 1 arguments, got %d' % len(args))
+            try:
+                self.__root
+            except AttributeError:
+                self.__root = root = []                     # sentinel node
+                root[:] = [root, root, None]
+                self.__map = {}
+            self.__update(*args, **kwds)
+
+        def __setitem__(self, key, value, dict_setitem=dict.__setitem__):
+            'od.__setitem__(i, y) <==> od[i]=y'
+            # Setting a new item creates a new link which goes at the end of the linked
+            # list, and the inherited dictionary is updated with the new key/value pair.
+            if key not in self:
+                root = self.__root
+                last = root[0]
+                last[1] = root[0] = self.__map[key] = [last, root, key]
+            dict_setitem(self, key, value)
+
+        def __delitem__(self, key, dict_delitem=dict.__delitem__):
+            'od.__delitem__(y) <==> del od[y]'
+            # Deleting an existing item uses self.__map to find the link which is
+            # then removed by updating the links in the predecessor and successor nodes.
+            dict_delitem(self, key)
+            link_prev, link_next, key = self.__map.pop(key)
+            link_prev[1] = link_next
+            link_next[0] = link_prev
+
+        def __iter__(self):
+            'od.__iter__() <==> iter(od)'
+            root = self.__root
+            curr = root[1]
+            while curr is not root:
+                yield curr[2]
+                curr = curr[1]
+
+        def __reversed__(self):
+            'od.__reversed__() <==> reversed(od)'
+            root = self.__root
+            curr = root[0]
+            while curr is not root:
+                yield curr[2]
+                curr = curr[0]
+
+        def clear(self):
+            'od.clear() -> None.  Remove all items from od.'
+            try:
+                for node in self.__map.itervalues():
+                    del node[:]
+                root = self.__root
+                root[:] = [root, root, None]
+                self.__map.clear()
+            except AttributeError:
+                pass
+            dict.clear(self)
+
+        def popitem(self, last=True):
+            '''od.popitem() -> (k, v), return and remove a (key, value) pair.
+            Pairs are returned in LIFO order if last is true or FIFO order if false.
+
+            '''
+            if not self:
+                raise KeyError('dictionary is empty')
+            root = self.__root
+            if last:
+                link = root[0]
+                link_prev = link[0]
+                link_prev[1] = root
+                root[0] = link_prev
+            else:
+                link = root[1]
+                link_next = link[1]
+                root[1] = link_next
+                link_next[0] = root
+            key = link[2]
+            del self.__map[key]
+            value = dict.pop(self, key)
+            return key, value
+
+        # -- the following methods do not depend on the internal structure --
+
+        def keys(self):
+            'od.keys() -> list of keys in od'
+            return list(self)
+
+        def values(self):
+            'od.values() -> list of values in od'
+            return [self[key] for key in self]
+
+        def items(self):
+            'od.items() -> list of (key, value) pairs in od'
+            return [(key, self[key]) for key in self]
+
+        def iterkeys(self):
+            'od.iterkeys() -> an iterator over the keys in od'
+            return iter(self)
+
+        def itervalues(self):
+            'od.itervalues -> an iterator over the values in od'
+            for k in self:
+                yield self[k]
+
+        def iteritems(self):
+            'od.iteritems -> an iterator over the (key, value) items in od'
+            for k in self:
+                yield (k, self[k])
+
+        def update(*args, **kwds):
+            '''od.update(E, **F) -> None.  Update od from dict/iterable E and F.
+
+            If E is a dict instance, does:           for k in E: od[k] = E[k]
+            If E has a .keys() method, does:         for k in E.keys(): od[k] = E[k]
+            Or if E is an iterable of items, does:   for k, v in E: od[k] = v
+            In either case, this is followed by:     for k, v in F.items(): od[k] = v
+
+            '''
+            if len(args) > 2:
+                raise TypeError('update() takes at most 2 positional '
+                                'arguments (%d given)' % (len(args),))
+            elif not args:
+                raise TypeError('update() takes at least 1 argument (0 given)')
+            self = args[0]
+            # Make progressively weaker assumptions about "other"
+            other = ()
+            if len(args) == 2:
+                other = args[1]
+            if isinstance(other, dict):
+                for key in other:
+                    self[key] = other[key]
+            elif hasattr(other, 'keys'):
+                for key in other.keys():
+                    self[key] = other[key]
+            else:
+                for key, value in other:
+                    self[key] = value
+            for key, value in kwds.items():
+                self[key] = value
+
+        __update = update  # let subclasses override update without breaking __init__
+
+        __marker = object()
+
+        def pop(self, key, default=__marker):
+            '''od.pop(k[,d]) -> v, remove specified key and return the corresponding value.
+            If key is not found, d is returned if given, otherwise KeyError is raised.
+
+            '''
+            if key in self:
+                result = self[key]
+                del self[key]
+                return result
+            if default is self.__marker:
+                raise KeyError(key)
+            return default
+
+        def setdefault(self, key, default=None):
+            'od.setdefault(k[,d]) -> od.get(k,d), also set od[k]=d if k not in od'
+            if key in self:
+                return self[key]
+            self[key] = default
+            return default
+
+        def __repr__(self, _repr_running=None):
+            'od.__repr__() <==> repr(od)'
+            if not _repr_running: _repr_running = {}
+            call_key = id(self), _get_ident()
+            if call_key in _repr_running:
+                return '...'
+            _repr_running[call_key] = 1
+            try:
+                if not self:
+                    return '%s()' % (self.__class__.__name__,)
+                return '%s(%r)' % (self.__class__.__name__, self.items())
+            finally:
+                del _repr_running[call_key]
+
+        def __reduce__(self):
+            'Return state information for pickling'
+            items = [[k, self[k]] for k in self]
+            inst_dict = vars(self).copy()
+            for k in vars(OrderedDict()):
+                inst_dict.pop(k, None)
+            if inst_dict:
+                return (self.__class__, (items,), inst_dict)
+            return self.__class__, (items,)
+
+        def copy(self):
+            'od.copy() -> a shallow copy of od'
+            return self.__class__(self)
+
+        @classmethod
+        def fromkeys(cls, iterable, value=None):
+            '''OD.fromkeys(S[, v]) -> New ordered dictionary with keys from S
+            and values equal to v (which defaults to None).
+
+            '''
+            d = cls()
+            for key in iterable:
+                d[key] = value
+            return d
+
+        def __eq__(self, other):
+            '''od.__eq__(y) <==> od==y.  Comparison to another OD is order-sensitive
+            while comparison to a regular mapping is order-insensitive.
+
+            '''
+            if isinstance(other, OrderedDict):
+                return len(self)==len(other) and self.items() == other.items()
+            return dict.__eq__(self, other)
+
+        def __ne__(self, other):
+            return not self == other
+
+        # -- the following methods are only used in Python 2.7 --
+
+        def viewkeys(self):
+            "od.viewkeys() -> a set-like object providing a view on od's keys"
+            return KeysView(self)
+
+        def viewvalues(self):
+            "od.viewvalues() -> an object providing a view on od's values"
+            return ValuesView(self)
+
+        def viewitems(self):
+            "od.viewitems() -> a set-like object providing a view on od's items"
+            return ItemsView(self)
+
+try:
+    from logging.config import BaseConfigurator, valid_ident
+except ImportError: # pragma: no cover
+    IDENTIFIER = re.compile('^[a-z_][a-z0-9_]*$', re.I)
+
+
+    def valid_ident(s):
+        m = IDENTIFIER.match(s)
+        if not m:
+            raise ValueError('Not a valid Python identifier: %r' % s)
+        return True
+
+
+    # The ConvertingXXX classes are wrappers around standard Python containers,
+    # and they serve to convert any suitable values in the container. The
+    # conversion converts base dicts, lists and tuples to their wrapped
+    # equivalents, whereas strings which match a conversion format are converted
+    # appropriately.
+    #
+    # Each wrapper should have a configurator attribute holding the actual
+    # configurator to use for conversion.
+
+    class ConvertingDict(dict):
+        """A converting dictionary wrapper."""
+
+        def __getitem__(self, key):
+            value = dict.__getitem__(self, key)
+            result = self.configurator.convert(value)
+            #If the converted value is different, save for next time
+            if value is not result:
+                self[key] = result
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+        def get(self, key, default=None):
+            value = dict.get(self, key, default)
+            result = self.configurator.convert(value)
+            #If the converted value is different, save for next time
+            if value is not result:
+                self[key] = result
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+    def pop(self, key, default=None):
+        value = dict.pop(self, key, default)
+        result = self.configurator.convert(value)
+        if value is not result:
+            if type(result) in (ConvertingDict, ConvertingList,
+                                ConvertingTuple):
+                result.parent = self
+                result.key = key
+        return result
+
+    class ConvertingList(list):
+        """A converting list wrapper."""
+        def __getitem__(self, key):
+            value = list.__getitem__(self, key)
+            result = self.configurator.convert(value)
+            #If the converted value is different, save for next time
+            if value is not result:
+                self[key] = result
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+        def pop(self, idx=-1):
+            value = list.pop(self, idx)
+            result = self.configurator.convert(value)
+            if value is not result:
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+            return result
+
+    class ConvertingTuple(tuple):
+        """A converting tuple wrapper."""
+        def __getitem__(self, key):
+            value = tuple.__getitem__(self, key)
+            result = self.configurator.convert(value)
+            if value is not result:
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+    class BaseConfigurator(object):
+        """
+        The configurator base class which defines some useful defaults.
+        """
+
+        CONVERT_PATTERN = re.compile(r'^(?P<prefix>[a-z]+)://(?P<suffix>.*)$')
+
+        WORD_PATTERN = re.compile(r'^\s*(\w+)\s*')
+        DOT_PATTERN = re.compile(r'^\.\s*(\w+)\s*')
+        INDEX_PATTERN = re.compile(r'^\[\s*(\w+)\s*\]\s*')
+        DIGIT_PATTERN = re.compile(r'^\d+$')
+
+        value_converters = {
+            'ext' : 'ext_convert',
+            'cfg' : 'cfg_convert',
+        }
+
+        # We might want to use a different one, e.g. importlib
+        importer = staticmethod(__import__)
+
+        def __init__(self, config):
+            self.config = ConvertingDict(config)
+            self.config.configurator = self
+
+        def resolve(self, s):
+            """
+            Resolve strings to objects using standard import and attribute
+            syntax.
+            """
+            name = s.split('.')
+            used = name.pop(0)
+            try:
+                found = self.importer(used)
+                for frag in name:
+                    used += '.' + frag
+                    try:
+                        found = getattr(found, frag)
+                    except AttributeError:
+                        self.importer(used)
+                        found = getattr(found, frag)
+                return found
+            except ImportError:
+                e, tb = sys.exc_info()[1:]
+                v = ValueError('Cannot resolve %r: %s' % (s, e))
+                v.__cause__, v.__traceback__ = e, tb
+                raise v
+
+        def ext_convert(self, value):
+            """Default converter for the ext:// protocol."""
+            return self.resolve(value)
+
+        def cfg_convert(self, value):
+            """Default converter for the cfg:// protocol."""
+            rest = value
+            m = self.WORD_PATTERN.match(rest)
+            if m is None:
+                raise ValueError("Unable to convert %r" % value)
+            else:
+                rest = rest[m.end():]
+                d = self.config[m.groups()[0]]
+                #print d, rest
+                while rest:
+                    m = self.DOT_PATTERN.match(rest)
+                    if m:
+                        d = d[m.groups()[0]]
+                    else:
+                        m = self.INDEX_PATTERN.match(rest)
+                        if m:
+                            idx = m.groups()[0]
+                            if not self.DIGIT_PATTERN.match(idx):
+                                d = d[idx]
+                            else:
+                                try:
+                                    n = int(idx) # try as number first (most likely)
+                                    d = d[n]
+                                except TypeError:
+                                    d = d[idx]
+                    if m:
+                        rest = rest[m.end():]
+                    else:
+                        raise ValueError('Unable to convert '
+                                         '%r at %r' % (value, rest))
+            #rest should be empty
+            return d
+
+        def convert(self, value):
+            """
+            Convert values to an appropriate type. dicts, lists and tuples are
+            replaced by their converting alternatives. Strings are checked to
+            see if they have a conversion format and are converted if they do.
+            """
+            if not isinstance(value, ConvertingDict) and isinstance(value, dict):
+                value = ConvertingDict(value)
+                value.configurator = self
+            elif not isinstance(value, ConvertingList) and isinstance(value, list):
+                value = ConvertingList(value)
+                value.configurator = self
+            elif not isinstance(value, ConvertingTuple) and\
+                     isinstance(value, tuple):
+                value = ConvertingTuple(value)
+                value.configurator = self
+            elif isinstance(value, string_types):
+                m = self.CONVERT_PATTERN.match(value)
+                if m:
+                    d = m.groupdict()
+                    prefix = d['prefix']
+                    converter = self.value_converters.get(prefix, None)
+                    if converter:
+                        suffix = d['suffix']
+                        converter = getattr(self, converter)
+                        value = converter(suffix)
+            return value
+
+        def configure_custom(self, config):
+            """Configure an object with a user-supplied factory."""
+            c = config.pop('()')
+            if not callable(c):
+                c = self.resolve(c)
+            props = config.pop('.', None)
+            # Check for valid identifiers
+            kwargs = dict([(k, config[k]) for k in config if valid_ident(k)])
+            result = c(**kwargs)
+            if props:
+                for name, value in props.items():
+                    setattr(result, name, value)
+            return result
+
+        def as_tuple(self, value):
+            """Utility function which converts lists to tuples."""
+            if isinstance(value, list):
+                value = tuple(value)
+            return value
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/database.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/database.py
new file mode 100644
index 0000000..0a90c30
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/database.py
@@ -0,0 +1,1339 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2017 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""PEP 376 implementation."""
+
+from __future__ import unicode_literals
+
+import base64
+import codecs
+import contextlib
+import hashlib
+import logging
+import os
+import posixpath
+import sys
+import zipimport
+
+from . import DistlibException, resources
+from .compat import StringIO
+from .version import get_scheme, UnsupportedVersionError
+from .metadata import (Metadata, METADATA_FILENAME, WHEEL_METADATA_FILENAME,
+                       LEGACY_METADATA_FILENAME)
+from .util import (parse_requirement, cached_property, parse_name_and_version,
+                   read_exports, write_exports, CSVReader, CSVWriter)
+
+
+__all__ = ['Distribution', 'BaseInstalledDistribution',
+           'InstalledDistribution', 'EggInfoDistribution',
+           'DistributionPath']
+
+
+logger = logging.getLogger(__name__)
+
+EXPORTS_FILENAME = 'pydist-exports.json'
+COMMANDS_FILENAME = 'pydist-commands.json'
+
+DIST_FILES = ('INSTALLER', METADATA_FILENAME, 'RECORD', 'REQUESTED',
+              'RESOURCES', EXPORTS_FILENAME, 'SHARED')
+
+DISTINFO_EXT = '.dist-info'
+
+
+class _Cache(object):
+    """
+    A simple cache mapping names and .dist-info paths to distributions
+    """
+    def __init__(self):
+        """
+        Initialise an instance. There is normally one for each DistributionPath.
+        """
+        self.name = {}
+        self.path = {}
+        self.generated = False
+
+    def clear(self):
+        """
+        Clear the cache, setting it to its initial state.
+        """
+        self.name.clear()
+        self.path.clear()
+        self.generated = False
+
+    def add(self, dist):
+        """
+        Add a distribution to the cache.
+        :param dist: The distribution to add.
+        """
+        if dist.path not in self.path:
+            self.path[dist.path] = dist
+            self.name.setdefault(dist.key, []).append(dist)
+
+
+class DistributionPath(object):
+    """
+    Represents a set of distributions installed on a path (typically sys.path).
+    """
+    def __init__(self, path=None, include_egg=False):
+        """
+        Create an instance from a path, optionally including legacy (distutils/
+        setuptools/distribute) distributions.
+        :param path: The path to use, as a list of directories. If not specified,
+                     sys.path is used.
+        :param include_egg: If True, this instance will look for and return legacy
+                            distributions as well as those based on PEP 376.
+        """
+        if path is None:
+            path = sys.path
+        self.path = path
+        self._include_dist = True
+        self._include_egg = include_egg
+
+        self._cache = _Cache()
+        self._cache_egg = _Cache()
+        self._cache_enabled = True
+        self._scheme = get_scheme('default')
+
+    def _get_cache_enabled(self):
+        return self._cache_enabled
+
+    def _set_cache_enabled(self, value):
+        self._cache_enabled = value
+
+    cache_enabled = property(_get_cache_enabled, _set_cache_enabled)
+
+    def clear_cache(self):
+        """
+        Clears the internal cache.
+        """
+        self._cache.clear()
+        self._cache_egg.clear()
+
+
+    def _yield_distributions(self):
+        """
+        Yield .dist-info and/or .egg(-info) distributions.
+        """
+        # We need to check if we've seen some resources already, because on
+        # some Linux systems (e.g. some Debian/Ubuntu variants) there are
+        # symlinks which alias other files in the environment.
+        seen = set()
+        for path in self.path:
+            finder = resources.finder_for_path(path)
+            if finder is None:
+                continue
+            r = finder.find('')
+            if not r or not r.is_container:
+                continue
+            rset = sorted(r.resources)
+            for entry in rset:
+                r = finder.find(entry)
+                if not r or r.path in seen:
+                    continue
+                if self._include_dist and entry.endswith(DISTINFO_EXT):
+                    possible_filenames = [METADATA_FILENAME,
+                                          WHEEL_METADATA_FILENAME,
+                                          LEGACY_METADATA_FILENAME]
+                    for metadata_filename in possible_filenames:
+                        metadata_path = posixpath.join(entry, metadata_filename)
+                        pydist = finder.find(metadata_path)
+                        if pydist:
+                            break
+                    else:
+                        continue
+
+                    with contextlib.closing(pydist.as_stream()) as stream:
+                        metadata = Metadata(fileobj=stream, scheme='legacy')
+                    logger.debug('Found %s', r.path)
+                    seen.add(r.path)
+                    yield new_dist_class(r.path, metadata=metadata,
+                                         env=self)
+                elif self._include_egg and entry.endswith(('.egg-info',
+                                                          '.egg')):
+                    logger.debug('Found %s', r.path)
+                    seen.add(r.path)
+                    yield old_dist_class(r.path, self)
+
+    def _generate_cache(self):
+        """
+        Scan the path for distributions and populate the cache with
+        those that are found.
+        """
+        gen_dist = not self._cache.generated
+        gen_egg = self._include_egg and not self._cache_egg.generated
+        if gen_dist or gen_egg:
+            for dist in self._yield_distributions():
+                if isinstance(dist, InstalledDistribution):
+                    self._cache.add(dist)
+                else:
+                    self._cache_egg.add(dist)
+
+            if gen_dist:
+                self._cache.generated = True
+            if gen_egg:
+                self._cache_egg.generated = True
+
+    @classmethod
+    def distinfo_dirname(cls, name, version):
+        """
+        The *name* and *version* parameters are converted into their
+        filename-escaped form, i.e. any ``'-'`` characters are replaced
+        with ``'_'`` other than the one in ``'dist-info'`` and the one
+        separating the name from the version number.
+
+        :parameter name: is converted to a standard distribution name by replacing
+                         any runs of non- alphanumeric characters with a single
+                         ``'-'``.
+        :type name: string
+        :parameter version: is converted to a standard version string. Spaces
+                            become dots, and all other non-alphanumeric characters
+                            (except dots) become dashes, with runs of multiple
+                            dashes condensed to a single dash.
+        :type version: string
+        :returns: directory name
+        :rtype: string"""
+        name = name.replace('-', '_')
+        return '-'.join([name, version]) + DISTINFO_EXT
+
+    def get_distributions(self):
+        """
+        Provides an iterator that looks for distributions and returns
+        :class:`InstalledDistribution` or
+        :class:`EggInfoDistribution` instances for each one of them.
+
+        :rtype: iterator of :class:`InstalledDistribution` and
+                :class:`EggInfoDistribution` instances
+        """
+        if not self._cache_enabled:
+            for dist in self._yield_distributions():
+                yield dist
+        else:
+            self._generate_cache()
+
+            for dist in self._cache.path.values():
+                yield dist
+
+            if self._include_egg:
+                for dist in self._cache_egg.path.values():
+                    yield dist
+
+    def get_distribution(self, name):
+        """
+        Looks for a named distribution on the path.
+
+        This function only returns the first result found, as no more than one
+        value is expected. If nothing is found, ``None`` is returned.
+
+        :rtype: :class:`InstalledDistribution`, :class:`EggInfoDistribution`
+                or ``None``
+        """
+        result = None
+        name = name.lower()
+        if not self._cache_enabled:
+            for dist in self._yield_distributions():
+                if dist.key == name:
+                    result = dist
+                    break
+        else:
+            self._generate_cache()
+
+            if name in self._cache.name:
+                result = self._cache.name[name][0]
+            elif self._include_egg and name in self._cache_egg.name:
+                result = self._cache_egg.name[name][0]
+        return result
+
+    def provides_distribution(self, name, version=None):
+        """
+        Iterates over all distributions to find which distributions provide *name*.
+        If a *version* is provided, it will be used to filter the results.
+
+        This function only returns the first result found, since no more than
+        one values are expected. If the directory is not found, returns ``None``.
+
+        :parameter version: a version specifier that indicates the version
+                            required, conforming to the format in ``PEP-345``
+
+        :type name: string
+        :type version: string
+        """
+        matcher = None
+        if version is not None:
+            try:
+                matcher = self._scheme.matcher('%s (%s)' % (name, version))
+            except ValueError:
+                raise DistlibException('invalid name or version: %r, %r' %
+                                      (name, version))
+
+        for dist in self.get_distributions():
+            # We hit a problem on Travis where enum34 was installed and doesn't
+            # have a provides attribute ...
+            if not hasattr(dist, 'provides'):
+                logger.debug('No "provides": %s', dist)
+            else:
+                provided = dist.provides
+
+                for p in provided:
+                    p_name, p_ver = parse_name_and_version(p)
+                    if matcher is None:
+                        if p_name == name:
+                            yield dist
+                            break
+                    else:
+                        if p_name == name and matcher.match(p_ver):
+                            yield dist
+                            break
+
+    def get_file_path(self, name, relative_path):
+        """
+        Return the path to a resource file.
+        """
+        dist = self.get_distribution(name)
+        if dist is None:
+            raise LookupError('no distribution named %r found' % name)
+        return dist.get_resource_path(relative_path)
+
+    def get_exported_entries(self, category, name=None):
+        """
+        Return all of the exported entries in a particular category.
+
+        :param category: The category to search for entries.
+        :param name: If specified, only entries with that name are returned.
+        """
+        for dist in self.get_distributions():
+            r = dist.exports
+            if category in r:
+                d = r[category]
+                if name is not None:
+                    if name in d:
+                        yield d[name]
+                else:
+                    for v in d.values():
+                        yield v
+
+
+class Distribution(object):
+    """
+    A base class for distributions, whether installed or from indexes.
+    Either way, it must have some metadata, so that's all that's needed
+    for construction.
+    """
+
+    build_time_dependency = False
+    """
+    Set to True if it's known to be only a build-time dependency (i.e.
+    not needed after installation).
+    """
+
+    requested = False
+    """A boolean that indicates whether the ``REQUESTED`` metadata file is
+    present (in other words, whether the package was installed by user
+    request or it was installed as a dependency)."""
+
+    def __init__(self, metadata):
+        """
+        Initialise an instance.
+        :param metadata: The instance of :class:`Metadata` describing this
+        distribution.
+        """
+        self.metadata = metadata
+        self.name = metadata.name
+        self.key = self.name.lower()    # for case-insensitive comparisons
+        self.version = metadata.version
+        self.locator = None
+        self.digest = None
+        self.extras = None      # additional features requested
+        self.context = None     # environment marker overrides
+        self.download_urls = set()
+        self.digests = {}
+
+    @property
+    def source_url(self):
+        """
+        The source archive download URL for this distribution.
+        """
+        return self.metadata.source_url
+
+    download_url = source_url   # Backward compatibility
+
+    @property
+    def name_and_version(self):
+        """
+        A utility property which displays the name and version in parentheses.
+        """
+        return '%s (%s)' % (self.name, self.version)
+
+    @property
+    def provides(self):
+        """
+        A set of distribution names and versions provided by this distribution.
+        :return: A set of "name (version)" strings.
+        """
+        plist = self.metadata.provides
+        s = '%s (%s)' % (self.name, self.version)
+        if s not in plist:
+            plist.append(s)
+        return plist
+
+    def _get_requirements(self, req_attr):
+        md = self.metadata
+        logger.debug('Getting requirements from metadata %r', md.todict())
+        reqts = getattr(md, req_attr)
+        return set(md.get_requirements(reqts, extras=self.extras,
+                                       env=self.context))
+
+    @property
+    def run_requires(self):
+        return self._get_requirements('run_requires')
+
+    @property
+    def meta_requires(self):
+        return self._get_requirements('meta_requires')
+
+    @property
+    def build_requires(self):
+        return self._get_requirements('build_requires')
+
+    @property
+    def test_requires(self):
+        return self._get_requirements('test_requires')
+
+    @property
+    def dev_requires(self):
+        return self._get_requirements('dev_requires')
+
+    def matches_requirement(self, req):
+        """
+        Say if this instance matches (fulfills) a requirement.
+        :param req: The requirement to match.
+        :rtype req: str
+        :return: True if it matches, else False.
+        """
+        # Requirement may contain extras - parse to lose those
+        # from what's passed to the matcher
+        r = parse_requirement(req)
+        scheme = get_scheme(self.metadata.scheme)
+        try:
+            matcher = scheme.matcher(r.requirement)
+        except UnsupportedVersionError:
+            # XXX compat-mode if cannot read the version
+            logger.warning('could not read version %r - using name only',
+                           req)
+            name = req.split()[0]
+            matcher = scheme.matcher(name)
+
+        name = matcher.key   # case-insensitive
+
+        result = False
+        for p in self.provides:
+            p_name, p_ver = parse_name_and_version(p)
+            if p_name != name:
+                continue
+            try:
+                result = matcher.match(p_ver)
+                break
+            except UnsupportedVersionError:
+                pass
+        return result
+
+    def __repr__(self):
+        """
+        Return a textual representation of this instance,
+        """
+        if self.source_url:
+            suffix = ' [%s]' % self.source_url
+        else:
+            suffix = ''
+        return '<Distribution %s (%s)%s>' % (self.name, self.version, suffix)
+
+    def __eq__(self, other):
+        """
+        See if this distribution is the same as another.
+        :param other: The distribution to compare with. To be equal to one
+                      another. distributions must have the same type, name,
+                      version and source_url.
+        :return: True if it is the same, else False.
+        """
+        if type(other) is not type(self):
+            result = False
+        else:
+            result = (self.name == other.name and
+                      self.version == other.version and
+                      self.source_url == other.source_url)
+        return result
+
+    def __hash__(self):
+        """
+        Compute hash in a way which matches the equality test.
+        """
+        return hash(self.name) + hash(self.version) + hash(self.source_url)
+
+
+class BaseInstalledDistribution(Distribution):
+    """
+    This is the base class for installed distributions (whether PEP 376 or
+    legacy).
+    """
+
+    hasher = None
+
+    def __init__(self, metadata, path, env=None):
+        """
+        Initialise an instance.
+        :param metadata: An instance of :class:`Metadata` which describes the
+                         distribution. This will normally have been initialised
+                         from a metadata file in the ``path``.
+        :param path:     The path of the ``.dist-info`` or ``.egg-info``
+                         directory for the distribution.
+        :param env:      This is normally the :class:`DistributionPath`
+                         instance where this distribution was found.
+        """
+        super(BaseInstalledDistribution, self).__init__(metadata)
+        self.path = path
+        self.dist_path = env
+
+    def get_hash(self, data, hasher=None):
+        """
+        Get the hash of some data, using a particular hash algorithm, if
+        specified.
+
+        :param data: The data to be hashed.
+        :type data: bytes
+        :param hasher: The name of a hash implementation, supported by hashlib,
+                       or ``None``. Examples of valid values are ``'sha1'``,
+                       ``'sha224'``, ``'sha384'``, '``sha256'``, ``'md5'`` and
+                       ``'sha512'``. If no hasher is specified, the ``hasher``
+                       attribute of the :class:`InstalledDistribution` instance
+                       is used. If the hasher is determined to be ``None``, MD5
+                       is used as the hashing algorithm.
+        :returns: The hash of the data. If a hasher was explicitly specified,
+                  the returned hash will be prefixed with the specified hasher
+                  followed by '='.
+        :rtype: str
+        """
+        if hasher is None:
+            hasher = self.hasher
+        if hasher is None:
+            hasher = hashlib.md5
+            prefix = ''
+        else:
+            hasher = getattr(hashlib, hasher)
+            prefix = '%s=' % self.hasher
+        digest = hasher(data).digest()
+        digest = base64.urlsafe_b64encode(digest).rstrip(b'=').decode('ascii')
+        return '%s%s' % (prefix, digest)
+
+
+class InstalledDistribution(BaseInstalledDistribution):
+    """
+    Created with the *path* of the ``.dist-info`` directory provided to the
+    constructor. It reads the metadata contained in ``pydist.json`` when it is
+    instantiated., or uses a passed in Metadata instance (useful for when
+    dry-run mode is being used).
+    """
+
+    hasher = 'sha256'
+
+    def __init__(self, path, metadata=None, env=None):
+        self.modules = []
+        self.finder = finder = resources.finder_for_path(path)
+        if finder is None:
+            raise ValueError('finder unavailable for %s' % path)
+        if env and env._cache_enabled and path in env._cache.path:
+            metadata = env._cache.path[path].metadata
+        elif metadata is None:
+            r = finder.find(METADATA_FILENAME)
+            # Temporary - for Wheel 0.23 support
+            if r is None:
+                r = finder.find(WHEEL_METADATA_FILENAME)
+            # Temporary - for legacy support
+            if r is None:
+                r = finder.find(LEGACY_METADATA_FILENAME)
+            if r is None:
+                raise ValueError('no %s found in %s' % (METADATA_FILENAME,
+                                                        path))
+            with contextlib.closing(r.as_stream()) as stream:
+                metadata = Metadata(fileobj=stream, scheme='legacy')
+
+        super(InstalledDistribution, self).__init__(metadata, path, env)
+
+        if env and env._cache_enabled:
+            env._cache.add(self)
+
+        r = finder.find('REQUESTED')
+        self.requested = r is not None
+        p  = os.path.join(path, 'top_level.txt')
+        if os.path.exists(p):
+            with open(p, 'rb') as f:
+                data = f.read().decode('utf-8')
+            self.modules = data.splitlines()
+
+    def __repr__(self):
+        return '<InstalledDistribution %r %s at %r>' % (
+            self.name, self.version, self.path)
+
+    def __str__(self):
+        return "%s %s" % (self.name, self.version)
+
+    def _get_records(self):
+        """
+        Get the list of installed files for the distribution
+        :return: A list of tuples of path, hash and size. Note that hash and
+                 size might be ``None`` for some entries. The path is exactly
+                 as stored in the file (which is as in PEP 376).
+        """
+        results = []
+        r = self.get_distinfo_resource('RECORD')
+        with contextlib.closing(r.as_stream()) as stream:
+            with CSVReader(stream=stream) as record_reader:
+                # Base location is parent dir of .dist-info dir
+                #base_location = os.path.dirname(self.path)
+                #base_location = os.path.abspath(base_location)
+                for row in record_reader:
+                    missing = [None for i in range(len(row), 3)]
+                    path, checksum, size = row + missing
+                    #if not os.path.isabs(path):
+                    #    path = path.replace('/', os.sep)
+                    #    path = os.path.join(base_location, path)
+                    results.append((path, checksum, size))
+        return results
+
+    @cached_property
+    def exports(self):
+        """
+        Return the information exported by this distribution.
+        :return: A dictionary of exports, mapping an export category to a dict
+                 of :class:`ExportEntry` instances describing the individual
+                 export entries, and keyed by name.
+        """
+        result = {}
+        r = self.get_distinfo_resource(EXPORTS_FILENAME)
+        if r:
+            result = self.read_exports()
+        return result
+
+    def read_exports(self):
+        """
+        Read exports data from a file in .ini format.
+
+        :return: A dictionary of exports, mapping an export category to a list
+                 of :class:`ExportEntry` instances describing the individual
+                 export entries.
+        """
+        result = {}
+        r = self.get_distinfo_resource(EXPORTS_FILENAME)
+        if r:
+            with contextlib.closing(r.as_stream()) as stream:
+                result = read_exports(stream)
+        return result
+
+    def write_exports(self, exports):
+        """
+        Write a dictionary of exports to a file in .ini format.
+        :param exports: A dictionary of exports, mapping an export category to
+                        a list of :class:`ExportEntry` instances describing the
+                        individual export entries.
+        """
+        rf = self.get_distinfo_file(EXPORTS_FILENAME)
+        with open(rf, 'w') as f:
+            write_exports(exports, f)
+
+    def get_resource_path(self, relative_path):
+        """
+        NOTE: This API may change in the future.
+
+        Return the absolute path to a resource file with the given relative
+        path.
+
+        :param relative_path: The path, relative to .dist-info, of the resource
+                              of interest.
+        :return: The absolute path where the resource is to be found.
+        """
+        r = self.get_distinfo_resource('RESOURCES')
+        with contextlib.closing(r.as_stream()) as stream:
+            with CSVReader(stream=stream) as resources_reader:
+                for relative, destination in resources_reader:
+                    if relative == relative_path:
+                        return destination
+        raise KeyError('no resource file with relative path %r '
+                       'is installed' % relative_path)
+
+    def list_installed_files(self):
+        """
+        Iterates over the ``RECORD`` entries and returns a tuple
+        ``(path, hash, size)`` for each line.
+
+        :returns: iterator of (path, hash, size)
+        """
+        for result in self._get_records():
+            yield result
+
+    def write_installed_files(self, paths, prefix, dry_run=False):
+        """
+        Writes the ``RECORD`` file, using the ``paths`` iterable passed in. Any
+        existing ``RECORD`` file is silently overwritten.
+
+        prefix is used to determine when to write absolute paths.
+        """
+        prefix = os.path.join(prefix, '')
+        base = os.path.dirname(self.path)
+        base_under_prefix = base.startswith(prefix)
+        base = os.path.join(base, '')
+        record_path = self.get_distinfo_file('RECORD')
+        logger.info('creating %s', record_path)
+        if dry_run:
+            return None
+        with CSVWriter(record_path) as writer:
+            for path in paths:
+                if os.path.isdir(path) or path.endswith(('.pyc', '.pyo')):
+                    # do not put size and hash, as in PEP-376
+                    hash_value = size = ''
+                else:
+                    size = '%d' % os.path.getsize(path)
+                    with open(path, 'rb') as fp:
+                        hash_value = self.get_hash(fp.read())
+                if path.startswith(base) or (base_under_prefix and
+                                             path.startswith(prefix)):
+                    path = os.path.relpath(path, base)
+                writer.writerow((path, hash_value, size))
+
+            # add the RECORD file itself
+            if record_path.startswith(base):
+                record_path = os.path.relpath(record_path, base)
+            writer.writerow((record_path, '', ''))
+        return record_path
+
+    def check_installed_files(self):
+        """
+        Checks that the hashes and sizes of the files in ``RECORD`` are
+        matched by the files themselves. Returns a (possibly empty) list of
+        mismatches. Each entry in the mismatch list will be a tuple consisting
+        of the path, 'exists', 'size' or 'hash' according to what didn't match
+        (existence is checked first, then size, then hash), the expected
+        value and the actual value.
+        """
+        mismatches = []
+        base = os.path.dirname(self.path)
+        record_path = self.get_distinfo_file('RECORD')
+        for path, hash_value, size in self.list_installed_files():
+            if not os.path.isabs(path):
+                path = os.path.join(base, path)
+            if path == record_path:
+                continue
+            if not os.path.exists(path):
+                mismatches.append((path, 'exists', True, False))
+            elif os.path.isfile(path):
+                actual_size = str(os.path.getsize(path))
+                if size and actual_size != size:
+                    mismatches.append((path, 'size', size, actual_size))
+                elif hash_value:
+                    if '=' in hash_value:
+                        hasher = hash_value.split('=', 1)[0]
+                    else:
+                        hasher = None
+
+                    with open(path, 'rb') as f:
+                        actual_hash = self.get_hash(f.read(), hasher)
+                        if actual_hash != hash_value:
+                            mismatches.append((path, 'hash', hash_value, actual_hash))
+        return mismatches
+
+    @cached_property
+    def shared_locations(self):
+        """
+        A dictionary of shared locations whose keys are in the set 'prefix',
+        'purelib', 'platlib', 'scripts', 'headers', 'data' and 'namespace'.
+        The corresponding value is the absolute path of that category for
+        this distribution, and takes into account any paths selected by the
+        user at installation time (e.g. via command-line arguments). In the
+        case of the 'namespace' key, this would be a list of absolute paths
+        for the roots of namespace packages in this distribution.
+
+        The first time this property is accessed, the relevant information is
+        read from the SHARED file in the .dist-info directory.
+        """
+        result = {}
+        shared_path = os.path.join(self.path, 'SHARED')
+        if os.path.isfile(shared_path):
+            with codecs.open(shared_path, 'r', encoding='utf-8') as f:
+                lines = f.read().splitlines()
+            for line in lines:
+                key, value = line.split('=', 1)
+                if key == 'namespace':
+                    result.setdefault(key, []).append(value)
+                else:
+                    result[key] = value
+        return result
+
+    def write_shared_locations(self, paths, dry_run=False):
+        """
+        Write shared location information to the SHARED file in .dist-info.
+        :param paths: A dictionary as described in the documentation for
+        :meth:`shared_locations`.
+        :param dry_run: If True, the action is logged but no file is actually
+                        written.
+        :return: The path of the file written to.
+        """
+        shared_path = os.path.join(self.path, 'SHARED')
+        logger.info('creating %s', shared_path)
+        if dry_run:
+            return None
+        lines = []
+        for key in ('prefix', 'lib', 'headers', 'scripts', 'data'):
+            path = paths[key]
+            if os.path.isdir(paths[key]):
+                lines.append('%s=%s' % (key,  path))
+        for ns in paths.get('namespace', ()):
+            lines.append('namespace=%s' % ns)
+
+        with codecs.open(shared_path, 'w', encoding='utf-8') as f:
+            f.write('\n'.join(lines))
+        return shared_path
+
+    def get_distinfo_resource(self, path):
+        if path not in DIST_FILES:
+            raise DistlibException('invalid path for a dist-info file: '
+                                   '%r at %r' % (path, self.path))
+        finder = resources.finder_for_path(self.path)
+        if finder is None:
+            raise DistlibException('Unable to get a finder for %s' % self.path)
+        return finder.find(path)
+
+    def get_distinfo_file(self, path):
+        """
+        Returns a path located under the ``.dist-info`` directory. Returns a
+        string representing the path.
+
+        :parameter path: a ``'/'``-separated path relative to the
+                         ``.dist-info`` directory or an absolute path;
+                         If *path* is an absolute path and doesn't start
+                         with the ``.dist-info`` directory path,
+                         a :class:`DistlibException` is raised
+        :type path: str
+        :rtype: str
+        """
+        # Check if it is an absolute path  # XXX use relpath, add tests
+        if path.find(os.sep) >= 0:
+            # it's an absolute path?
+            distinfo_dirname, path = path.split(os.sep)[-2:]
+            if distinfo_dirname != self.path.split(os.sep)[-1]:
+                raise DistlibException(
+                    'dist-info file %r does not belong to the %r %s '
+                    'distribution' % (path, self.name, self.version))
+
+        # The file must be relative
+        if path not in DIST_FILES:
+            raise DistlibException('invalid path for a dist-info file: '
+                                   '%r at %r' % (path, self.path))
+
+        return os.path.join(self.path, path)
+
+    def list_distinfo_files(self):
+        """
+        Iterates over the ``RECORD`` entries and returns paths for each line if
+        the path is pointing to a file located in the ``.dist-info`` directory
+        or one of its subdirectories.
+
+        :returns: iterator of paths
+        """
+        base = os.path.dirname(self.path)
+        for path, checksum, size in self._get_records():
+            # XXX add separator or use real relpath algo
+            if not os.path.isabs(path):
+                path = os.path.join(base, path)
+            if path.startswith(self.path):
+                yield path
+
+    def __eq__(self, other):
+        return (isinstance(other, InstalledDistribution) and
+                self.path == other.path)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    __hash__ = object.__hash__
+
+
+class EggInfoDistribution(BaseInstalledDistribution):
+    """Created with the *path* of the ``.egg-info`` directory or file provided
+    to the constructor. It reads the metadata contained in the file itself, or
+    if the given path happens to be a directory, the metadata is read from the
+    file ``PKG-INFO`` under that directory."""
+
+    requested = True    # as we have no way of knowing, assume it was
+    shared_locations = {}
+
+    def __init__(self, path, env=None):
+        def set_name_and_version(s, n, v):
+            s.name = n
+            s.key = n.lower()   # for case-insensitive comparisons
+            s.version = v
+
+        self.path = path
+        self.dist_path = env
+        if env and env._cache_enabled and path in env._cache_egg.path:
+            metadata = env._cache_egg.path[path].metadata
+            set_name_and_version(self, metadata.name, metadata.version)
+        else:
+            metadata = self._get_metadata(path)
+
+            # Need to be set before caching
+            set_name_and_version(self, metadata.name, metadata.version)
+
+            if env and env._cache_enabled:
+                env._cache_egg.add(self)
+        super(EggInfoDistribution, self).__init__(metadata, path, env)
+
+    def _get_metadata(self, path):
+        requires = None
+
+        def parse_requires_data(data):
+            """Create a list of dependencies from a requires.txt file.
+
+            *data*: the contents of a setuptools-produced requires.txt file.
+            """
+            reqs = []
+            lines = data.splitlines()
+            for line in lines:
+                line = line.strip()
+                if line.startswith('['):
+                    logger.warning('Unexpected line: quitting requirement scan: %r',
+                                   line)
+                    break
+                r = parse_requirement(line)
+                if not r:
+                    logger.warning('Not recognised as a requirement: %r', line)
+                    continue
+                if r.extras:
+                    logger.warning('extra requirements in requires.txt are '
+                                   'not supported')
+                if not r.constraints:
+                    reqs.append(r.name)
+                else:
+                    cons = ', '.join('%s%s' % c for c in r.constraints)
+                    reqs.append('%s (%s)' % (r.name, cons))
+            return reqs
+
+        def parse_requires_path(req_path):
+            """Create a list of dependencies from a requires.txt file.
+
+            *req_path*: the path to a setuptools-produced requires.txt file.
+            """
+
+            reqs = []
+            try:
+                with codecs.open(req_path, 'r', 'utf-8') as fp:
+                    reqs = parse_requires_data(fp.read())
+            except IOError:
+                pass
+            return reqs
+
+        tl_path = tl_data = None
+        if path.endswith('.egg'):
+            if os.path.isdir(path):
+                p = os.path.join(path, 'EGG-INFO')
+                meta_path = os.path.join(p, 'PKG-INFO')
+                metadata = Metadata(path=meta_path, scheme='legacy')
+                req_path = os.path.join(p, 'requires.txt')
+                tl_path = os.path.join(p, 'top_level.txt')
+                requires = parse_requires_path(req_path)
+            else:
+                # FIXME handle the case where zipfile is not available
+                zipf = zipimport.zipimporter(path)
+                fileobj = StringIO(
+                    zipf.get_data('EGG-INFO/PKG-INFO').decode('utf8'))
+                metadata = Metadata(fileobj=fileobj, scheme='legacy')
+                try:
+                    data = zipf.get_data('EGG-INFO/requires.txt')
+                    tl_data = zipf.get_data('EGG-INFO/top_level.txt').decode('utf-8')
+                    requires = parse_requires_data(data.decode('utf-8'))
+                except IOError:
+                    requires = None
+        elif path.endswith('.egg-info'):
+            if os.path.isdir(path):
+                req_path = os.path.join(path, 'requires.txt')
+                requires = parse_requires_path(req_path)
+                path = os.path.join(path, 'PKG-INFO')
+                tl_path = os.path.join(path, 'top_level.txt')
+            metadata = Metadata(path=path, scheme='legacy')
+        else:
+            raise DistlibException('path must end with .egg-info or .egg, '
+                                   'got %r' % path)
+
+        if requires:
+            metadata.add_requirements(requires)
+        # look for top-level modules in top_level.txt, if present
+        if tl_data is None:
+            if tl_path is not None and os.path.exists(tl_path):
+                with open(tl_path, 'rb') as f:
+                    tl_data = f.read().decode('utf-8')
+        if not tl_data:
+            tl_data = []
+        else:
+            tl_data = tl_data.splitlines()
+        self.modules = tl_data
+        return metadata
+
+    def __repr__(self):
+        return '<EggInfoDistribution %r %s at %r>' % (
+            self.name, self.version, self.path)
+
+    def __str__(self):
+        return "%s %s" % (self.name, self.version)
+
+    def check_installed_files(self):
+        """
+        Checks that the hashes and sizes of the files in ``RECORD`` are
+        matched by the files themselves. Returns a (possibly empty) list of
+        mismatches. Each entry in the mismatch list will be a tuple consisting
+        of the path, 'exists', 'size' or 'hash' according to what didn't match
+        (existence is checked first, then size, then hash), the expected
+        value and the actual value.
+        """
+        mismatches = []
+        record_path = os.path.join(self.path, 'installed-files.txt')
+        if os.path.exists(record_path):
+            for path, _, _ in self.list_installed_files():
+                if path == record_path:
+                    continue
+                if not os.path.exists(path):
+                    mismatches.append((path, 'exists', True, False))
+        return mismatches
+
+    def list_installed_files(self):
+        """
+        Iterates over the ``installed-files.txt`` entries and returns a tuple
+        ``(path, hash, size)`` for each line.
+
+        :returns: a list of (path, hash, size)
+        """
+
+        def _md5(path):
+            f = open(path, 'rb')
+            try:
+                content = f.read()
+            finally:
+                f.close()
+            return hashlib.md5(content).hexdigest()
+
+        def _size(path):
+            return os.stat(path).st_size
+
+        record_path = os.path.join(self.path, 'installed-files.txt')
+        result = []
+        if os.path.exists(record_path):
+            with codecs.open(record_path, 'r', encoding='utf-8') as f:
+                for line in f:
+                    line = line.strip()
+                    p = os.path.normpath(os.path.join(self.path, line))
+                    # "./" is present as a marker between installed files
+                    # and installation metadata files
+                    if not os.path.exists(p):
+                        logger.warning('Non-existent file: %s', p)
+                        if p.endswith(('.pyc', '.pyo')):
+                            continue
+                        #otherwise fall through and fail
+                    if not os.path.isdir(p):
+                        result.append((p, _md5(p), _size(p)))
+            result.append((record_path, None, None))
+        return result
+
+    def list_distinfo_files(self, absolute=False):
+        """
+        Iterates over the ``installed-files.txt`` entries and returns paths for
+        each line if the path is pointing to a file located in the
+        ``.egg-info`` directory or one of its subdirectories.
+
+        :parameter absolute: If *absolute* is ``True``, each returned path is
+                          transformed into a local absolute path. Otherwise the
+                          raw value from ``installed-files.txt`` is returned.
+        :type absolute: boolean
+        :returns: iterator of paths
+        """
+        record_path = os.path.join(self.path, 'installed-files.txt')
+        if os.path.exists(record_path):
+            skip = True
+            with codecs.open(record_path, 'r', encoding='utf-8') as f:
+                for line in f:
+                    line = line.strip()
+                    if line == './':
+                        skip = False
+                        continue
+                    if not skip:
+                        p = os.path.normpath(os.path.join(self.path, line))
+                        if p.startswith(self.path):
+                            if absolute:
+                                yield p
+                            else:
+                                yield line
+
+    def __eq__(self, other):
+        return (isinstance(other, EggInfoDistribution) and
+                self.path == other.path)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    __hash__ = object.__hash__
+
+new_dist_class = InstalledDistribution
+old_dist_class = EggInfoDistribution
+
+
+class DependencyGraph(object):
+    """
+    Represents a dependency graph between distributions.
+
+    The dependency relationships are stored in an ``adjacency_list`` that maps
+    distributions to a list of ``(other, label)`` tuples where  ``other``
+    is a distribution and the edge is labeled with ``label`` (i.e. the version
+    specifier, if such was provided). Also, for more efficient traversal, for
+    every distribution ``x``, a list of predecessors is kept in
+    ``reverse_list[x]``. An edge from distribution ``a`` to
+    distribution ``b`` means that ``a`` depends on ``b``. If any missing
+    dependencies are found, they are stored in ``missing``, which is a
+    dictionary that maps distributions to a list of requirements that were not
+    provided by any other distributions.
+    """
+
+    def __init__(self):
+        self.adjacency_list = {}
+        self.reverse_list = {}
+        self.missing = {}
+
+    def add_distribution(self, distribution):
+        """Add the *distribution* to the graph.
+
+        :type distribution: :class:`distutils2.database.InstalledDistribution`
+                            or :class:`distutils2.database.EggInfoDistribution`
+        """
+        self.adjacency_list[distribution] = []
+        self.reverse_list[distribution] = []
+        #self.missing[distribution] = []
+
+    def add_edge(self, x, y, label=None):
+        """Add an edge from distribution *x* to distribution *y* with the given
+        *label*.
+
+        :type x: :class:`distutils2.database.InstalledDistribution` or
+                 :class:`distutils2.database.EggInfoDistribution`
+        :type y: :class:`distutils2.database.InstalledDistribution` or
+                 :class:`distutils2.database.EggInfoDistribution`
+        :type label: ``str`` or ``None``
+        """
+        self.adjacency_list[x].append((y, label))
+        # multiple edges are allowed, so be careful
+        if x not in self.reverse_list[y]:
+            self.reverse_list[y].append(x)
+
+    def add_missing(self, distribution, requirement):
+        """
+        Add a missing *requirement* for the given *distribution*.
+
+        :type distribution: :class:`distutils2.database.InstalledDistribution`
+                            or :class:`distutils2.database.EggInfoDistribution`
+        :type requirement: ``str``
+        """
+        logger.debug('%s missing %r', distribution, requirement)
+        self.missing.setdefault(distribution, []).append(requirement)
+
+    def _repr_dist(self, dist):
+        return '%s %s' % (dist.name, dist.version)
+
+    def repr_node(self, dist, level=1):
+        """Prints only a subgraph"""
+        output = [self._repr_dist(dist)]
+        for other, label in self.adjacency_list[dist]:
+            dist = self._repr_dist(other)
+            if label is not None:
+                dist = '%s [%s]' % (dist, label)
+            output.append('    ' * level + str(dist))
+            suboutput = self.repr_node(other, level + 1)
+            subs = suboutput.split('\n')
+            output.extend(subs[1:])
+        return '\n'.join(output)
+
+    def to_dot(self, f, skip_disconnected=True):
+        """Writes a DOT output for the graph to the provided file *f*.
+
+        If *skip_disconnected* is set to ``True``, then all distributions
+        that are not dependent on any other distribution are skipped.
+
+        :type f: has to support ``file``-like operations
+        :type skip_disconnected: ``bool``
+        """
+        disconnected = []
+
+        f.write("digraph dependencies {\n")
+        for dist, adjs in self.adjacency_list.items():
+            if len(adjs) == 0 and not skip_disconnected:
+                disconnected.append(dist)
+            for other, label in adjs:
+                if not label is None:
+                    f.write('"%s" -> "%s" [label="%s"]\n' %
+                            (dist.name, other.name, label))
+                else:
+                    f.write('"%s" -> "%s"\n' % (dist.name, other.name))
+        if not skip_disconnected and len(disconnected) > 0:
+            f.write('subgraph disconnected {\n')
+            f.write('label = "Disconnected"\n')
+            f.write('bgcolor = red\n')
+
+            for dist in disconnected:
+                f.write('"%s"' % dist.name)
+                f.write('\n')
+            f.write('}\n')
+        f.write('}\n')
+
+    def topological_sort(self):
+        """
+        Perform a topological sort of the graph.
+        :return: A tuple, the first element of which is a topologically sorted
+                 list of distributions, and the second element of which is a
+                 list of distributions that cannot be sorted because they have
+                 circular dependencies and so form a cycle.
+        """
+        result = []
+        # Make a shallow copy of the adjacency list
+        alist = {}
+        for k, v in self.adjacency_list.items():
+            alist[k] = v[:]
+        while True:
+            # See what we can remove in this run
+            to_remove = []
+            for k, v in list(alist.items())[:]:
+                if not v:
+                    to_remove.append(k)
+                    del alist[k]
+            if not to_remove:
+                # What's left in alist (if anything) is a cycle.
+                break
+            # Remove from the adjacency list of others
+            for k, v in alist.items():
+                alist[k] = [(d, r) for d, r in v if d not in to_remove]
+            logger.debug('Moving to result: %s',
+                         ['%s (%s)' % (d.name, d.version) for d in to_remove])
+            result.extend(to_remove)
+        return result, list(alist.keys())
+
+    def __repr__(self):
+        """Representation of the graph"""
+        output = []
+        for dist, adjs in self.adjacency_list.items():
+            output.append(self.repr_node(dist))
+        return '\n'.join(output)
+
+
+def make_graph(dists, scheme='default'):
+    """Makes a dependency graph from the given distributions.
+
+    :parameter dists: a list of distributions
+    :type dists: list of :class:`distutils2.database.InstalledDistribution` and
+                 :class:`distutils2.database.EggInfoDistribution` instances
+    :rtype: a :class:`DependencyGraph` instance
+    """
+    scheme = get_scheme(scheme)
+    graph = DependencyGraph()
+    provided = {}  # maps names to lists of (version, dist) tuples
+
+    # first, build the graph and find out what's provided
+    for dist in dists:
+        graph.add_distribution(dist)
+
+        for p in dist.provides:
+            name, version = parse_name_and_version(p)
+            logger.debug('Add to provided: %s, %s, %s', name, version, dist)
+            provided.setdefault(name, []).append((version, dist))
+
+    # now make the edges
+    for dist in dists:
+        requires = (dist.run_requires | dist.meta_requires |
+                    dist.build_requires | dist.dev_requires)
+        for req in requires:
+            try:
+                matcher = scheme.matcher(req)
+            except UnsupportedVersionError:
+                # XXX compat-mode if cannot read the version
+                logger.warning('could not read version %r - using name only',
+                               req)
+                name = req.split()[0]
+                matcher = scheme.matcher(name)
+
+            name = matcher.key   # case-insensitive
+
+            matched = False
+            if name in provided:
+                for version, provider in provided[name]:
+                    try:
+                        match = matcher.match(version)
+                    except UnsupportedVersionError:
+                        match = False
+
+                    if match:
+                        graph.add_edge(dist, provider, req)
+                        matched = True
+                        break
+            if not matched:
+                graph.add_missing(dist, req)
+    return graph
+
+
+def get_dependent_dists(dists, dist):
+    """Recursively generate a list of distributions from *dists* that are
+    dependent on *dist*.
+
+    :param dists: a list of distributions
+    :param dist: a distribution, member of *dists* for which we are interested
+    """
+    if dist not in dists:
+        raise DistlibException('given distribution %r is not a member '
+                               'of the list' % dist.name)
+    graph = make_graph(dists)
+
+    dep = [dist]  # dependent distributions
+    todo = graph.reverse_list[dist]  # list of nodes we should inspect
+
+    while todo:
+        d = todo.pop()
+        dep.append(d)
+        for succ in graph.reverse_list[d]:
+            if succ not in dep:
+                todo.append(succ)
+
+    dep.pop(0)  # remove dist from dep, was there to prevent infinite loops
+    return dep
+
+
+def get_required_dists(dists, dist):
+    """Recursively generate a list of distributions from *dists* that are
+    required by *dist*.
+
+    :param dists: a list of distributions
+    :param dist: a distribution, member of *dists* for which we are interested
+    """
+    if dist not in dists:
+        raise DistlibException('given distribution %r is not a member '
+                               'of the list' % dist.name)
+    graph = make_graph(dists)
+
+    req = []  # required distributions
+    todo = graph.adjacency_list[dist]  # list of nodes we should inspect
+
+    while todo:
+        d = todo.pop()[0]
+        req.append(d)
+        for pred in graph.adjacency_list[d]:
+            if pred not in req:
+                todo.append(pred)
+
+    return req
+
+
+def make_dist(name, version, **kwargs):
+    """
+    A convenience method for making a dist given just a name and version.
+    """
+    summary = kwargs.pop('summary', 'Placeholder for summary')
+    md = Metadata(**kwargs)
+    md.name = name
+    md.version = version
+    md.summary = summary or 'Placeholder for summary'
+    return Distribution(md)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/index.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/index.py
new file mode 100644
index 0000000..7a87cdc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/index.py
@@ -0,0 +1,516 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+import hashlib
+import logging
+import os
+import shutil
+import subprocess
+import tempfile
+try:
+    from threading import Thread
+except ImportError:
+    from dummy_threading import Thread
+
+from . import DistlibException
+from .compat import (HTTPBasicAuthHandler, Request, HTTPPasswordMgr,
+                     urlparse, build_opener, string_types)
+from .util import cached_property, zip_dir, ServerProxy
+
+logger = logging.getLogger(__name__)
+
+DEFAULT_INDEX = 'https://pypi.org/pypi'
+DEFAULT_REALM = 'pypi'
+
+class PackageIndex(object):
+    """
+    This class represents a package index compatible with PyPI, the Python
+    Package Index.
+    """
+
+    boundary = b'----------ThIs_Is_tHe_distlib_index_bouNdaRY_$'
+
+    def __init__(self, url=None):
+        """
+        Initialise an instance.
+
+        :param url: The URL of the index. If not specified, the URL for PyPI is
+                    used.
+        """
+        self.url = url or DEFAULT_INDEX
+        self.read_configuration()
+        scheme, netloc, path, params, query, frag = urlparse(self.url)
+        if params or query or frag or scheme not in ('http', 'https'):
+            raise DistlibException('invalid repository: %s' % self.url)
+        self.password_handler = None
+        self.ssl_verifier = None
+        self.gpg = None
+        self.gpg_home = None
+        with open(os.devnull, 'w') as sink:
+            # Use gpg by default rather than gpg2, as gpg2 insists on
+            # prompting for passwords
+            for s in ('gpg', 'gpg2'):
+                try:
+                    rc = subprocess.check_call([s, '--version'], stdout=sink,
+                                               stderr=sink)
+                    if rc == 0:
+                        self.gpg = s
+                        break
+                except OSError:
+                    pass
+
+    def _get_pypirc_command(self):
+        """
+        Get the distutils command for interacting with PyPI configurations.
+        :return: the command.
+        """
+        from distutils.core import Distribution
+        from distutils.config import PyPIRCCommand
+        d = Distribution()
+        return PyPIRCCommand(d)
+
+    def read_configuration(self):
+        """
+        Read the PyPI access configuration as supported by distutils, getting
+        PyPI to do the actual work. This populates ``username``, ``password``,
+        ``realm`` and ``url`` attributes from the configuration.
+        """
+        # get distutils to do the work
+        c = self._get_pypirc_command()
+        c.repository = self.url
+        cfg = c._read_pypirc()
+        self.username = cfg.get('username')
+        self.password = cfg.get('password')
+        self.realm = cfg.get('realm', 'pypi')
+        self.url = cfg.get('repository', self.url)
+
+    def save_configuration(self):
+        """
+        Save the PyPI access configuration. You must have set ``username`` and
+        ``password`` attributes before calling this method.
+
+        Again, distutils is used to do the actual work.
+        """
+        self.check_credentials()
+        # get distutils to do the work
+        c = self._get_pypirc_command()
+        c._store_pypirc(self.username, self.password)
+
+    def check_credentials(self):
+        """
+        Check that ``username`` and ``password`` have been set, and raise an
+        exception if not.
+        """
+        if self.username is None or self.password is None:
+            raise DistlibException('username and password must be set')
+        pm = HTTPPasswordMgr()
+        _, netloc, _, _, _, _ = urlparse(self.url)
+        pm.add_password(self.realm, netloc, self.username, self.password)
+        self.password_handler = HTTPBasicAuthHandler(pm)
+
+    def register(self, metadata):
+        """
+        Register a distribution on PyPI, using the provided metadata.
+
+        :param metadata: A :class:`Metadata` instance defining at least a name
+                         and version number for the distribution to be
+                         registered.
+        :return: The HTTP response received from PyPI upon submission of the
+                request.
+        """
+        self.check_credentials()
+        metadata.validate()
+        d = metadata.todict()
+        d[':action'] = 'verify'
+        request = self.encode_request(d.items(), [])
+        response = self.send_request(request)
+        d[':action'] = 'submit'
+        request = self.encode_request(d.items(), [])
+        return self.send_request(request)
+
+    def _reader(self, name, stream, outbuf):
+        """
+        Thread runner for reading lines of from a subprocess into a buffer.
+
+        :param name: The logical name of the stream (used for logging only).
+        :param stream: The stream to read from. This will typically a pipe
+                       connected to the output stream of a subprocess.
+        :param outbuf: The list to append the read lines to.
+        """
+        while True:
+            s = stream.readline()
+            if not s:
+                break
+            s = s.decode('utf-8').rstrip()
+            outbuf.append(s)
+            logger.debug('%s: %s' % (name, s))
+        stream.close()
+
+    def get_sign_command(self, filename, signer, sign_password,
+                         keystore=None):
+        """
+        Return a suitable command for signing a file.
+
+        :param filename: The pathname to the file to be signed.
+        :param signer: The identifier of the signer of the file.
+        :param sign_password: The passphrase for the signer's
+                              private key used for signing.
+        :param keystore: The path to a directory which contains the keys
+                         used in verification. If not specified, the
+                         instance's ``gpg_home`` attribute is used instead.
+        :return: The signing command as a list suitable to be
+                 passed to :class:`subprocess.Popen`.
+        """
+        cmd = [self.gpg, '--status-fd', '2', '--no-tty']
+        if keystore is None:
+            keystore = self.gpg_home
+        if keystore:
+            cmd.extend(['--homedir', keystore])
+        if sign_password is not None:
+            cmd.extend(['--batch', '--passphrase-fd', '0'])
+        td = tempfile.mkdtemp()
+        sf = os.path.join(td, os.path.basename(filename) + '.asc')
+        cmd.extend(['--detach-sign', '--armor', '--local-user',
+                    signer, '--output', sf, filename])
+        logger.debug('invoking: %s', ' '.join(cmd))
+        return cmd, sf
+
+    def run_command(self, cmd, input_data=None):
+        """
+        Run a command in a child process , passing it any input data specified.
+
+        :param cmd: The command to run.
+        :param input_data: If specified, this must be a byte string containing
+                           data to be sent to the child process.
+        :return: A tuple consisting of the subprocess' exit code, a list of
+                 lines read from the subprocess' ``stdout``, and a list of
+                 lines read from the subprocess' ``stderr``.
+        """
+        kwargs = {
+            'stdout': subprocess.PIPE,
+            'stderr': subprocess.PIPE,
+        }
+        if input_data is not None:
+            kwargs['stdin'] = subprocess.PIPE
+        stdout = []
+        stderr = []
+        p = subprocess.Popen(cmd, **kwargs)
+        # We don't use communicate() here because we may need to
+        # get clever with interacting with the command
+        t1 = Thread(target=self._reader, args=('stdout', p.stdout, stdout))
+        t1.start()
+        t2 = Thread(target=self._reader, args=('stderr', p.stderr, stderr))
+        t2.start()
+        if input_data is not None:
+            p.stdin.write(input_data)
+            p.stdin.close()
+
+        p.wait()
+        t1.join()
+        t2.join()
+        return p.returncode, stdout, stderr
+
+    def sign_file(self, filename, signer, sign_password, keystore=None):
+        """
+        Sign a file.
+
+        :param filename: The pathname to the file to be signed.
+        :param signer: The identifier of the signer of the file.
+        :param sign_password: The passphrase for the signer's
+                              private key used for signing.
+        :param keystore: The path to a directory which contains the keys
+                         used in signing. If not specified, the instance's
+                         ``gpg_home`` attribute is used instead.
+        :return: The absolute pathname of the file where the signature is
+                 stored.
+        """
+        cmd, sig_file = self.get_sign_command(filename, signer, sign_password,
+                                              keystore)
+        rc, stdout, stderr = self.run_command(cmd,
+                                              sign_password.encode('utf-8'))
+        if rc != 0:
+            raise DistlibException('sign command failed with error '
+                                   'code %s' % rc)
+        return sig_file
+
+    def upload_file(self, metadata, filename, signer=None, sign_password=None,
+                    filetype='sdist', pyversion='source', keystore=None):
+        """
+        Upload a release file to the index.
+
+        :param metadata: A :class:`Metadata` instance defining at least a name
+                         and version number for the file to be uploaded.
+        :param filename: The pathname of the file to be uploaded.
+        :param signer: The identifier of the signer of the file.
+        :param sign_password: The passphrase for the signer's
+                              private key used for signing.
+        :param filetype: The type of the file being uploaded. This is the
+                        distutils command which produced that file, e.g.
+                        ``sdist`` or ``bdist_wheel``.
+        :param pyversion: The version of Python which the release relates
+                          to. For code compatible with any Python, this would
+                          be ``source``, otherwise it would be e.g. ``3.2``.
+        :param keystore: The path to a directory which contains the keys
+                         used in signing. If not specified, the instance's
+                         ``gpg_home`` attribute is used instead.
+        :return: The HTTP response received from PyPI upon submission of the
+                request.
+        """
+        self.check_credentials()
+        if not os.path.exists(filename):
+            raise DistlibException('not found: %s' % filename)
+        metadata.validate()
+        d = metadata.todict()
+        sig_file = None
+        if signer:
+            if not self.gpg:
+                logger.warning('no signing program available - not signed')
+            else:
+                sig_file = self.sign_file(filename, signer, sign_password,
+                                          keystore)
+        with open(filename, 'rb') as f:
+            file_data = f.read()
+        md5_digest = hashlib.md5(file_data).hexdigest()
+        sha256_digest = hashlib.sha256(file_data).hexdigest()
+        d.update({
+            ':action': 'file_upload',
+            'protocol_version': '1',
+            'filetype': filetype,
+            'pyversion': pyversion,
+            'md5_digest': md5_digest,
+            'sha256_digest': sha256_digest,
+        })
+        files = [('content', os.path.basename(filename), file_data)]
+        if sig_file:
+            with open(sig_file, 'rb') as f:
+                sig_data = f.read()
+            files.append(('gpg_signature', os.path.basename(sig_file),
+                         sig_data))
+            shutil.rmtree(os.path.dirname(sig_file))
+        request = self.encode_request(d.items(), files)
+        return self.send_request(request)
+
+    def upload_documentation(self, metadata, doc_dir):
+        """
+        Upload documentation to the index.
+
+        :param metadata: A :class:`Metadata` instance defining at least a name
+                         and version number for the documentation to be
+                         uploaded.
+        :param doc_dir: The pathname of the directory which contains the
+                        documentation. This should be the directory that
+                        contains the ``index.html`` for the documentation.
+        :return: The HTTP response received from PyPI upon submission of the
+                request.
+        """
+        self.check_credentials()
+        if not os.path.isdir(doc_dir):
+            raise DistlibException('not a directory: %r' % doc_dir)
+        fn = os.path.join(doc_dir, 'index.html')
+        if not os.path.exists(fn):
+            raise DistlibException('not found: %r' % fn)
+        metadata.validate()
+        name, version = metadata.name, metadata.version
+        zip_data = zip_dir(doc_dir).getvalue()
+        fields = [(':action', 'doc_upload'),
+                  ('name', name), ('version', version)]
+        files = [('content', name, zip_data)]
+        request = self.encode_request(fields, files)
+        return self.send_request(request)
+
+    def get_verify_command(self, signature_filename, data_filename,
+                           keystore=None):
+        """
+        Return a suitable command for verifying a file.
+
+        :param signature_filename: The pathname to the file containing the
+                                   signature.
+        :param data_filename: The pathname to the file containing the
+                              signed data.
+        :param keystore: The path to a directory which contains the keys
+                         used in verification. If not specified, the
+                         instance's ``gpg_home`` attribute is used instead.
+        :return: The verifying command as a list suitable to be
+                 passed to :class:`subprocess.Popen`.
+        """
+        cmd = [self.gpg, '--status-fd', '2', '--no-tty']
+        if keystore is None:
+            keystore = self.gpg_home
+        if keystore:
+            cmd.extend(['--homedir', keystore])
+        cmd.extend(['--verify', signature_filename, data_filename])
+        logger.debug('invoking: %s', ' '.join(cmd))
+        return cmd
+
+    def verify_signature(self, signature_filename, data_filename,
+                         keystore=None):
+        """
+        Verify a signature for a file.
+
+        :param signature_filename: The pathname to the file containing the
+                                   signature.
+        :param data_filename: The pathname to the file containing the
+                              signed data.
+        :param keystore: The path to a directory which contains the keys
+                         used in verification. If not specified, the
+                         instance's ``gpg_home`` attribute is used instead.
+        :return: True if the signature was verified, else False.
+        """
+        if not self.gpg:
+            raise DistlibException('verification unavailable because gpg '
+                                   'unavailable')
+        cmd = self.get_verify_command(signature_filename, data_filename,
+                                      keystore)
+        rc, stdout, stderr = self.run_command(cmd)
+        if rc not in (0, 1):
+            raise DistlibException('verify command failed with error '
+                             'code %s' % rc)
+        return rc == 0
+
+    def download_file(self, url, destfile, digest=None, reporthook=None):
+        """
+        This is a convenience method for downloading a file from an URL.
+        Normally, this will be a file from the index, though currently
+        no check is made for this (i.e. a file can be downloaded from
+        anywhere).
+
+        The method is just like the :func:`urlretrieve` function in the
+        standard library, except that it allows digest computation to be
+        done during download and checking that the downloaded data
+        matched any expected value.
+
+        :param url: The URL of the file to be downloaded (assumed to be
+                    available via an HTTP GET request).
+        :param destfile: The pathname where the downloaded file is to be
+                         saved.
+        :param digest: If specified, this must be a (hasher, value)
+                       tuple, where hasher is the algorithm used (e.g.
+                       ``'md5'``) and ``value`` is the expected value.
+        :param reporthook: The same as for :func:`urlretrieve` in the
+                           standard library.
+        """
+        if digest is None:
+            digester = None
+            logger.debug('No digest specified')
+        else:
+            if isinstance(digest, (list, tuple)):
+                hasher, digest = digest
+            else:
+                hasher = 'md5'
+            digester = getattr(hashlib, hasher)()
+            logger.debug('Digest specified: %s' % digest)
+        # The following code is equivalent to urlretrieve.
+        # We need to do it this way so that we can compute the
+        # digest of the file as we go.
+        with open(destfile, 'wb') as dfp:
+            # addinfourl is not a context manager on 2.x
+            # so we have to use try/finally
+            sfp = self.send_request(Request(url))
+            try:
+                headers = sfp.info()
+                blocksize = 8192
+                size = -1
+                read = 0
+                blocknum = 0
+                if "content-length" in headers:
+                    size = int(headers["Content-Length"])
+                if reporthook:
+                    reporthook(blocknum, blocksize, size)
+                while True:
+                    block = sfp.read(blocksize)
+                    if not block:
+                        break
+                    read += len(block)
+                    dfp.write(block)
+                    if digester:
+                        digester.update(block)
+                    blocknum += 1
+                    if reporthook:
+                        reporthook(blocknum, blocksize, size)
+            finally:
+                sfp.close()
+
+        # check that we got the whole file, if we can
+        if size >= 0 and read < size:
+            raise DistlibException(
+                'retrieval incomplete: got only %d out of %d bytes'
+                % (read, size))
+        # if we have a digest, it must match.
+        if digester:
+            actual = digester.hexdigest()
+            if digest != actual:
+                raise DistlibException('%s digest mismatch for %s: expected '
+                                       '%s, got %s' % (hasher, destfile,
+                                                       digest, actual))
+            logger.debug('Digest verified: %s', digest)
+
+    def send_request(self, req):
+        """
+        Send a standard library :class:`Request` to PyPI and return its
+        response.
+
+        :param req: The request to send.
+        :return: The HTTP response from PyPI (a standard library HTTPResponse).
+        """
+        handlers = []
+        if self.password_handler:
+            handlers.append(self.password_handler)
+        if self.ssl_verifier:
+            handlers.append(self.ssl_verifier)
+        opener = build_opener(*handlers)
+        return opener.open(req)
+
+    def encode_request(self, fields, files):
+        """
+        Encode fields and files for posting to an HTTP server.
+
+        :param fields: The fields to send as a list of (fieldname, value)
+                       tuples.
+        :param files: The files to send as a list of (fieldname, filename,
+                      file_bytes) tuple.
+        """
+        # Adapted from packaging, which in turn was adapted from
+        # http://code.activestate.com/recipes/146306
+
+        parts = []
+        boundary = self.boundary
+        for k, values in fields:
+            if not isinstance(values, (list, tuple)):
+                values = [values]
+
+            for v in values:
+                parts.extend((
+                    b'--' + boundary,
+                    ('Content-Disposition: form-data; name="%s"' %
+                     k).encode('utf-8'),
+                    b'',
+                    v.encode('utf-8')))
+        for key, filename, value in files:
+            parts.extend((
+                b'--' + boundary,
+                ('Content-Disposition: form-data; name="%s"; filename="%s"' %
+                 (key, filename)).encode('utf-8'),
+                b'',
+                value))
+
+        parts.extend((b'--' + boundary + b'--', b''))
+
+        body = b'\r\n'.join(parts)
+        ct = b'multipart/form-data; boundary=' + boundary
+        headers = {
+            'Content-type': ct,
+            'Content-length': str(len(body))
+        }
+        return Request(self.url, body, headers)
+
+    def search(self, terms, operator=None):
+        if isinstance(terms, string_types):
+            terms = {'name': terms}
+        rpc_proxy = ServerProxy(self.url, timeout=3.0)
+        try:
+            return rpc_proxy.search(terms, operator or 'and')
+        finally:
+            rpc_proxy('close')()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/locators.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/locators.py
new file mode 100644
index 0000000..12a1d06
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/locators.py
@@ -0,0 +1,1302 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2015 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+
+import gzip
+from io import BytesIO
+import json
+import logging
+import os
+import posixpath
+import re
+try:
+    import threading
+except ImportError:  # pragma: no cover
+    import dummy_threading as threading
+import zlib
+
+from . import DistlibException
+from .compat import (urljoin, urlparse, urlunparse, url2pathname, pathname2url,
+                     queue, quote, unescape, string_types, build_opener,
+                     HTTPRedirectHandler as BaseRedirectHandler, text_type,
+                     Request, HTTPError, URLError)
+from .database import Distribution, DistributionPath, make_dist
+from .metadata import Metadata, MetadataInvalidError
+from .util import (cached_property, parse_credentials, ensure_slash,
+                   split_filename, get_project_data, parse_requirement,
+                   parse_name_and_version, ServerProxy, normalize_name)
+from .version import get_scheme, UnsupportedVersionError
+from .wheel import Wheel, is_compatible
+
+logger = logging.getLogger(__name__)
+
+HASHER_HASH = re.compile(r'^(\w+)=([a-f0-9]+)')
+CHARSET = re.compile(r';\s*charset\s*=\s*(.*)\s*$', re.I)
+HTML_CONTENT_TYPE = re.compile('text/html|application/x(ht)?ml')
+DEFAULT_INDEX = 'https://pypi.org/pypi'
+
+def get_all_distribution_names(url=None):
+    """
+    Return all distribution names known by an index.
+    :param url: The URL of the index.
+    :return: A list of all known distribution names.
+    """
+    if url is None:
+        url = DEFAULT_INDEX
+    client = ServerProxy(url, timeout=3.0)
+    try:
+        return client.list_packages()
+    finally:
+        client('close')()
+
+class RedirectHandler(BaseRedirectHandler):
+    """
+    A class to work around a bug in some Python 3.2.x releases.
+    """
+    # There's a bug in the base version for some 3.2.x
+    # (e.g. 3.2.2 on Ubuntu Oneiric). If a Location header
+    # returns e.g. /abc, it bails because it says the scheme ''
+    # is bogus, when actually it should use the request's
+    # URL for the scheme. See Python issue #13696.
+    def http_error_302(self, req, fp, code, msg, headers):
+        # Some servers (incorrectly) return multiple Location headers
+        # (so probably same goes for URI).  Use first header.
+        newurl = None
+        for key in ('location', 'uri'):
+            if key in headers:
+                newurl = headers[key]
+                break
+        if newurl is None:  # pragma: no cover
+            return
+        urlparts = urlparse(newurl)
+        if urlparts.scheme == '':
+            newurl = urljoin(req.get_full_url(), newurl)
+            if hasattr(headers, 'replace_header'):
+                headers.replace_header(key, newurl)
+            else:
+                headers[key] = newurl
+        return BaseRedirectHandler.http_error_302(self, req, fp, code, msg,
+                                                  headers)
+
+    http_error_301 = http_error_303 = http_error_307 = http_error_302
+
+class Locator(object):
+    """
+    A base class for locators - things that locate distributions.
+    """
+    source_extensions = ('.tar.gz', '.tar.bz2', '.tar', '.zip', '.tgz', '.tbz')
+    binary_extensions = ('.egg', '.exe', '.whl')
+    excluded_extensions = ('.pdf',)
+
+    # A list of tags indicating which wheels you want to match. The default
+    # value of None matches against the tags compatible with the running
+    # Python. If you want to match other values, set wheel_tags on a locator
+    # instance to a list of tuples (pyver, abi, arch) which you want to match.
+    wheel_tags = None
+
+    downloadable_extensions = source_extensions + ('.whl',)
+
+    def __init__(self, scheme='default'):
+        """
+        Initialise an instance.
+        :param scheme: Because locators look for most recent versions, they
+                       need to know the version scheme to use. This specifies
+                       the current PEP-recommended scheme - use ``'legacy'``
+                       if you need to support existing distributions on PyPI.
+        """
+        self._cache = {}
+        self.scheme = scheme
+        # Because of bugs in some of the handlers on some of the platforms,
+        # we use our own opener rather than just using urlopen.
+        self.opener = build_opener(RedirectHandler())
+        # If get_project() is called from locate(), the matcher instance
+        # is set from the requirement passed to locate(). See issue #18 for
+        # why this can be useful to know.
+        self.matcher = None
+        self.errors = queue.Queue()
+
+    def get_errors(self):
+        """
+        Return any errors which have occurred.
+        """
+        result = []
+        while not self.errors.empty():  # pragma: no cover
+            try:
+                e = self.errors.get(False)
+                result.append(e)
+            except self.errors.Empty:
+                continue
+            self.errors.task_done()
+        return result
+
+    def clear_errors(self):
+        """
+        Clear any errors which may have been logged.
+        """
+        # Just get the errors and throw them away
+        self.get_errors()
+
+    def clear_cache(self):
+        self._cache.clear()
+
+    def _get_scheme(self):
+        return self._scheme
+
+    def _set_scheme(self, value):
+        self._scheme = value
+
+    scheme = property(_get_scheme, _set_scheme)
+
+    def _get_project(self, name):
+        """
+        For a given project, get a dictionary mapping available versions to Distribution
+        instances.
+
+        This should be implemented in subclasses.
+
+        If called from a locate() request, self.matcher will be set to a
+        matcher for the requirement to satisfy, otherwise it will be None.
+        """
+        raise NotImplementedError('Please implement in the subclass')
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        raise NotImplementedError('Please implement in the subclass')
+
+    def get_project(self, name):
+        """
+        For a given project, get a dictionary mapping available versions to Distribution
+        instances.
+
+        This calls _get_project to do all the work, and just implements a caching layer on top.
+        """
+        if self._cache is None:  # pragma: no cover
+            result = self._get_project(name)
+        elif name in self._cache:
+            result = self._cache[name]
+        else:
+            self.clear_errors()
+            result = self._get_project(name)
+            self._cache[name] = result
+        return result
+
+    def score_url(self, url):
+        """
+        Give an url a score which can be used to choose preferred URLs
+        for a given project release.
+        """
+        t = urlparse(url)
+        basename = posixpath.basename(t.path)
+        compatible = True
+        is_wheel = basename.endswith('.whl')
+        is_downloadable = basename.endswith(self.downloadable_extensions)
+        if is_wheel:
+            compatible = is_compatible(Wheel(basename), self.wheel_tags)
+        return (t.scheme == 'https', 'pypi.org' in t.netloc,
+                is_downloadable, is_wheel, compatible, basename)
+
+    def prefer_url(self, url1, url2):
+        """
+        Choose one of two URLs where both are candidates for distribution
+        archives for the same version of a distribution (for example,
+        .tar.gz vs. zip).
+
+        The current implementation favours https:// URLs over http://, archives
+        from PyPI over those from other locations, wheel compatibility (if a
+        wheel) and then the archive name.
+        """
+        result = url2
+        if url1:
+            s1 = self.score_url(url1)
+            s2 = self.score_url(url2)
+            if s1 > s2:
+                result = url1
+            if result != url2:
+                logger.debug('Not replacing %r with %r', url1, url2)
+            else:
+                logger.debug('Replacing %r with %r', url1, url2)
+        return result
+
+    def split_filename(self, filename, project_name):
+        """
+        Attempt to split a filename in project name, version and Python version.
+        """
+        return split_filename(filename, project_name)
+
+    def convert_url_to_download_info(self, url, project_name):
+        """
+        See if a URL is a candidate for a download URL for a project (the URL
+        has typically been scraped from an HTML page).
+
+        If it is, a dictionary is returned with keys "name", "version",
+        "filename" and "url"; otherwise, None is returned.
+        """
+        def same_project(name1, name2):
+            return normalize_name(name1) == normalize_name(name2)
+
+        result = None
+        scheme, netloc, path, params, query, frag = urlparse(url)
+        if frag.lower().startswith('egg='):  # pragma: no cover
+            logger.debug('%s: version hint in fragment: %r',
+                         project_name, frag)
+        m = HASHER_HASH.match(frag)
+        if m:
+            algo, digest = m.groups()
+        else:
+            algo, digest = None, None
+        origpath = path
+        if path and path[-1] == '/':  # pragma: no cover
+            path = path[:-1]
+        if path.endswith('.whl'):
+            try:
+                wheel = Wheel(path)
+                if not is_compatible(wheel, self.wheel_tags):
+                    logger.debug('Wheel not compatible: %s', path)
+                else:
+                    if project_name is None:
+                        include = True
+                    else:
+                        include = same_project(wheel.name, project_name)
+                    if include:
+                        result = {
+                            'name': wheel.name,
+                            'version': wheel.version,
+                            'filename': wheel.filename,
+                            'url': urlunparse((scheme, netloc, origpath,
+                                               params, query, '')),
+                            'python-version': ', '.join(
+                                ['.'.join(list(v[2:])) for v in wheel.pyver]),
+                        }
+            except Exception as e:  # pragma: no cover
+                logger.warning('invalid path for wheel: %s', path)
+        elif not path.endswith(self.downloadable_extensions):  # pragma: no cover
+            logger.debug('Not downloadable: %s', path)
+        else:  # downloadable extension
+            path = filename = posixpath.basename(path)
+            for ext in self.downloadable_extensions:
+                if path.endswith(ext):
+                    path = path[:-len(ext)]
+                    t = self.split_filename(path, project_name)
+                    if not t:  # pragma: no cover
+                        logger.debug('No match for project/version: %s', path)
+                    else:
+                        name, version, pyver = t
+                        if not project_name or same_project(project_name, name):
+                            result = {
+                                'name': name,
+                                'version': version,
+                                'filename': filename,
+                                'url': urlunparse((scheme, netloc, origpath,
+                                                   params, query, '')),
+                                #'packagetype': 'sdist',
+                            }
+                            if pyver:  # pragma: no cover
+                                result['python-version'] = pyver
+                    break
+        if result and algo:
+            result['%s_digest' % algo] = digest
+        return result
+
+    def _get_digest(self, info):
+        """
+        Get a digest from a dictionary by looking at a "digests" dictionary
+        or keys of the form 'algo_digest'.
+
+        Returns a 2-tuple (algo, digest) if found, else None. Currently
+        looks only for SHA256, then MD5.
+        """
+        result = None
+        if 'digests' in info:
+            digests = info['digests']
+            for algo in ('sha256', 'md5'):
+                if algo in digests:
+                    result = (algo, digests[algo])
+                    break
+        if not result:
+            for algo in ('sha256', 'md5'):
+                key = '%s_digest' % algo
+                if key in info:
+                    result = (algo, info[key])
+                    break
+        return result
+
+    def _update_version_data(self, result, info):
+        """
+        Update a result dictionary (the final result from _get_project) with a
+        dictionary for a specific version, which typically holds information
+        gleaned from a filename or URL for an archive for the distribution.
+        """
+        name = info.pop('name')
+        version = info.pop('version')
+        if version in result:
+            dist = result[version]
+            md = dist.metadata
+        else:
+            dist = make_dist(name, version, scheme=self.scheme)
+            md = dist.metadata
+        dist.digest = digest = self._get_digest(info)
+        url = info['url']
+        result['digests'][url] = digest
+        if md.source_url != info['url']:
+            md.source_url = self.prefer_url(md.source_url, url)
+            result['urls'].setdefault(version, set()).add(url)
+        dist.locator = self
+        result[version] = dist
+
+    def locate(self, requirement, prereleases=False):
+        """
+        Find the most recent distribution which matches the given
+        requirement.
+
+        :param requirement: A requirement of the form 'foo (1.0)' or perhaps
+                            'foo (>= 1.0, < 2.0, != 1.3)'
+        :param prereleases: If ``True``, allow pre-release versions
+                            to be located. Otherwise, pre-release versions
+                            are not returned.
+        :return: A :class:`Distribution` instance, or ``None`` if no such
+                 distribution could be located.
+        """
+        result = None
+        r = parse_requirement(requirement)
+        if r is None:  # pragma: no cover
+            raise DistlibException('Not a valid requirement: %r' % requirement)
+        scheme = get_scheme(self.scheme)
+        self.matcher = matcher = scheme.matcher(r.requirement)
+        logger.debug('matcher: %s (%s)', matcher, type(matcher).__name__)
+        versions = self.get_project(r.name)
+        if len(versions) > 2:   # urls and digests keys are present
+            # sometimes, versions are invalid
+            slist = []
+            vcls = matcher.version_class
+            for k in versions:
+                if k in ('urls', 'digests'):
+                    continue
+                try:
+                    if not matcher.match(k):
+                        logger.debug('%s did not match %r', matcher, k)
+                    else:
+                        if prereleases or not vcls(k).is_prerelease:
+                            slist.append(k)
+                        else:
+                            logger.debug('skipping pre-release '
+                                         'version %s of %s', k, matcher.name)
+                except Exception:  # pragma: no cover
+                    logger.warning('error matching %s with %r', matcher, k)
+                    pass # slist.append(k)
+            if len(slist) > 1:
+                slist = sorted(slist, key=scheme.key)
+            if slist:
+                logger.debug('sorted list: %s', slist)
+                version = slist[-1]
+                result = versions[version]
+        if result:
+            if r.extras:
+                result.extras = r.extras
+            result.download_urls = versions.get('urls', {}).get(version, set())
+            d = {}
+            sd = versions.get('digests', {})
+            for url in result.download_urls:
+                if url in sd:  # pragma: no cover
+                    d[url] = sd[url]
+            result.digests = d
+        self.matcher = None
+        return result
+
+
+class PyPIRPCLocator(Locator):
+    """
+    This locator uses XML-RPC to locate distributions. It therefore
+    cannot be used with simple mirrors (that only mirror file content).
+    """
+    def __init__(self, url, **kwargs):
+        """
+        Initialise an instance.
+
+        :param url: The URL to use for XML-RPC.
+        :param kwargs: Passed to the superclass constructor.
+        """
+        super(PyPIRPCLocator, self).__init__(**kwargs)
+        self.base_url = url
+        self.client = ServerProxy(url, timeout=3.0)
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        return set(self.client.list_packages())
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        versions = self.client.package_releases(name, True)
+        for v in versions:
+            urls = self.client.release_urls(name, v)
+            data = self.client.release_data(name, v)
+            metadata = Metadata(scheme=self.scheme)
+            metadata.name = data['name']
+            metadata.version = data['version']
+            metadata.license = data.get('license')
+            metadata.keywords = data.get('keywords', [])
+            metadata.summary = data.get('summary')
+            dist = Distribution(metadata)
+            if urls:
+                info = urls[0]
+                metadata.source_url = info['url']
+                dist.digest = self._get_digest(info)
+                dist.locator = self
+                result[v] = dist
+                for info in urls:
+                    url = info['url']
+                    digest = self._get_digest(info)
+                    result['urls'].setdefault(v, set()).add(url)
+                    result['digests'][url] = digest
+        return result
+
+class PyPIJSONLocator(Locator):
+    """
+    This locator uses PyPI's JSON interface. It's very limited in functionality
+    and probably not worth using.
+    """
+    def __init__(self, url, **kwargs):
+        super(PyPIJSONLocator, self).__init__(**kwargs)
+        self.base_url = ensure_slash(url)
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        raise NotImplementedError('Not available from this locator')
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        url = urljoin(self.base_url, '%s/json' % quote(name))
+        try:
+            resp = self.opener.open(url)
+            data = resp.read().decode() # for now
+            d = json.loads(data)
+            md = Metadata(scheme=self.scheme)
+            data = d['info']
+            md.name = data['name']
+            md.version = data['version']
+            md.license = data.get('license')
+            md.keywords = data.get('keywords', [])
+            md.summary = data.get('summary')
+            dist = Distribution(md)
+            dist.locator = self
+            urls = d['urls']
+            result[md.version] = dist
+            for info in d['urls']:
+                url = info['url']
+                dist.download_urls.add(url)
+                dist.digests[url] = self._get_digest(info)
+                result['urls'].setdefault(md.version, set()).add(url)
+                result['digests'][url] = self._get_digest(info)
+            # Now get other releases
+            for version, infos in d['releases'].items():
+                if version == md.version:
+                    continue    # already done
+                omd = Metadata(scheme=self.scheme)
+                omd.name = md.name
+                omd.version = version
+                odist = Distribution(omd)
+                odist.locator = self
+                result[version] = odist
+                for info in infos:
+                    url = info['url']
+                    odist.download_urls.add(url)
+                    odist.digests[url] = self._get_digest(info)
+                    result['urls'].setdefault(version, set()).add(url)
+                    result['digests'][url] = self._get_digest(info)
+#            for info in urls:
+#                md.source_url = info['url']
+#                dist.digest = self._get_digest(info)
+#                dist.locator = self
+#                for info in urls:
+#                    url = info['url']
+#                    result['urls'].setdefault(md.version, set()).add(url)
+#                    result['digests'][url] = self._get_digest(info)
+        except Exception as e:
+            self.errors.put(text_type(e))
+            logger.exception('JSON fetch failed: %s', e)
+        return result
+
+
+class Page(object):
+    """
+    This class represents a scraped HTML page.
+    """
+    # The following slightly hairy-looking regex just looks for the contents of
+    # an anchor link, which has an attribute "href" either immediately preceded
+    # or immediately followed by a "rel" attribute. The attribute values can be
+    # declared with double quotes, single quotes or no quotes - which leads to
+    # the length of the expression.
+    _href = re.compile("""
+(rel\\s*=\\s*(?:"(?P<rel1>[^"]*)"|'(?P<rel2>[^']*)'|(?P<rel3>[^>\\s\n]*))\\s+)?
+href\\s*=\\s*(?:"(?P<url1>[^"]*)"|'(?P<url2>[^']*)'|(?P<url3>[^>\\s\n]*))
+(\\s+rel\\s*=\\s*(?:"(?P<rel4>[^"]*)"|'(?P<rel5>[^']*)'|(?P<rel6>[^>\\s\n]*)))?
+""", re.I | re.S | re.X)
+    _base = re.compile(r"""<base\s+href\s*=\s*['"]?([^'">]+)""", re.I | re.S)
+
+    def __init__(self, data, url):
+        """
+        Initialise an instance with the Unicode page contents and the URL they
+        came from.
+        """
+        self.data = data
+        self.base_url = self.url = url
+        m = self._base.search(self.data)
+        if m:
+            self.base_url = m.group(1)
+
+    _clean_re = re.compile(r'[^a-z0-9$&+,/:;=?@.#%_\\|-]', re.I)
+
+    @cached_property
+    def links(self):
+        """
+        Return the URLs of all the links on a page together with information
+        about their "rel" attribute, for determining which ones to treat as
+        downloads and which ones to queue for further scraping.
+        """
+        def clean(url):
+            "Tidy up an URL."
+            scheme, netloc, path, params, query, frag = urlparse(url)
+            return urlunparse((scheme, netloc, quote(path),
+                               params, query, frag))
+
+        result = set()
+        for match in self._href.finditer(self.data):
+            d = match.groupdict('')
+            rel = (d['rel1'] or d['rel2'] or d['rel3'] or
+                   d['rel4'] or d['rel5'] or d['rel6'])
+            url = d['url1'] or d['url2'] or d['url3']
+            url = urljoin(self.base_url, url)
+            url = unescape(url)
+            url = self._clean_re.sub(lambda m: '%%%2x' % ord(m.group(0)), url)
+            result.add((url, rel))
+        # We sort the result, hoping to bring the most recent versions
+        # to the front
+        result = sorted(result, key=lambda t: t[0], reverse=True)
+        return result
+
+
+class SimpleScrapingLocator(Locator):
+    """
+    A locator which scrapes HTML pages to locate downloads for a distribution.
+    This runs multiple threads to do the I/O; performance is at least as good
+    as pip's PackageFinder, which works in an analogous fashion.
+    """
+
+    # These are used to deal with various Content-Encoding schemes.
+    decoders = {
+        'deflate': zlib.decompress,
+        'gzip': lambda b: gzip.GzipFile(fileobj=BytesIO(d)).read(),
+        'none': lambda b: b,
+    }
+
+    def __init__(self, url, timeout=None, num_workers=10, **kwargs):
+        """
+        Initialise an instance.
+        :param url: The root URL to use for scraping.
+        :param timeout: The timeout, in seconds, to be applied to requests.
+                        This defaults to ``None`` (no timeout specified).
+        :param num_workers: The number of worker threads you want to do I/O,
+                            This defaults to 10.
+        :param kwargs: Passed to the superclass.
+        """
+        super(SimpleScrapingLocator, self).__init__(**kwargs)
+        self.base_url = ensure_slash(url)
+        self.timeout = timeout
+        self._page_cache = {}
+        self._seen = set()
+        self._to_fetch = queue.Queue()
+        self._bad_hosts = set()
+        self.skip_externals = False
+        self.num_workers = num_workers
+        self._lock = threading.RLock()
+        # See issue #45: we need to be resilient when the locator is used
+        # in a thread, e.g. with concurrent.futures. We can't use self._lock
+        # as it is for coordinating our internal threads - the ones created
+        # in _prepare_threads.
+        self._gplock = threading.RLock()
+        self.platform_check = False  # See issue #112
+
+    def _prepare_threads(self):
+        """
+        Threads are created only when get_project is called, and terminate
+        before it returns. They are there primarily to parallelise I/O (i.e.
+        fetching web pages).
+        """
+        self._threads = []
+        for i in range(self.num_workers):
+            t = threading.Thread(target=self._fetch)
+            t.setDaemon(True)
+            t.start()
+            self._threads.append(t)
+
+    def _wait_threads(self):
+        """
+        Tell all the threads to terminate (by sending a sentinel value) and
+        wait for them to do so.
+        """
+        # Note that you need two loops, since you can't say which
+        # thread will get each sentinel
+        for t in self._threads:
+            self._to_fetch.put(None)    # sentinel
+        for t in self._threads:
+            t.join()
+        self._threads = []
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        with self._gplock:
+            self.result = result
+            self.project_name = name
+            url = urljoin(self.base_url, '%s/' % quote(name))
+            self._seen.clear()
+            self._page_cache.clear()
+            self._prepare_threads()
+            try:
+                logger.debug('Queueing %s', url)
+                self._to_fetch.put(url)
+                self._to_fetch.join()
+            finally:
+                self._wait_threads()
+            del self.result
+        return result
+
+    platform_dependent = re.compile(r'\b(linux_(i\d86|x86_64|arm\w+)|'
+                                    r'win(32|_amd64)|macosx_?\d+)\b', re.I)
+
+    def _is_platform_dependent(self, url):
+        """
+        Does an URL refer to a platform-specific download?
+        """
+        return self.platform_dependent.search(url)
+
+    def _process_download(self, url):
+        """
+        See if an URL is a suitable download for a project.
+
+        If it is, register information in the result dictionary (for
+        _get_project) about the specific version it's for.
+
+        Note that the return value isn't actually used other than as a boolean
+        value.
+        """
+        if self.platform_check and self._is_platform_dependent(url):
+            info = None
+        else:
+            info = self.convert_url_to_download_info(url, self.project_name)
+        logger.debug('process_download: %s -> %s', url, info)
+        if info:
+            with self._lock:    # needed because self.result is shared
+                self._update_version_data(self.result, info)
+        return info
+
+    def _should_queue(self, link, referrer, rel):
+        """
+        Determine whether a link URL from a referring page and with a
+        particular "rel" attribute should be queued for scraping.
+        """
+        scheme, netloc, path, _, _, _ = urlparse(link)
+        if path.endswith(self.source_extensions + self.binary_extensions +
+                         self.excluded_extensions):
+            result = False
+        elif self.skip_externals and not link.startswith(self.base_url):
+            result = False
+        elif not referrer.startswith(self.base_url):
+            result = False
+        elif rel not in ('homepage', 'download'):
+            result = False
+        elif scheme not in ('http', 'https', 'ftp'):
+            result = False
+        elif self._is_platform_dependent(link):
+            result = False
+        else:
+            host = netloc.split(':', 1)[0]
+            if host.lower() == 'localhost':
+                result = False
+            else:
+                result = True
+        logger.debug('should_queue: %s (%s) from %s -> %s', link, rel,
+                     referrer, result)
+        return result
+
+    def _fetch(self):
+        """
+        Get a URL to fetch from the work queue, get the HTML page, examine its
+        links for download candidates and candidates for further scraping.
+
+        This is a handy method to run in a thread.
+        """
+        while True:
+            url = self._to_fetch.get()
+            try:
+                if url:
+                    page = self.get_page(url)
+                    if page is None:    # e.g. after an error
+                        continue
+                    for link, rel in page.links:
+                        if link not in self._seen:
+                            try:
+                                self._seen.add(link)
+                                if (not self._process_download(link) and
+                                    self._should_queue(link, url, rel)):
+                                    logger.debug('Queueing %s from %s', link, url)
+                                    self._to_fetch.put(link)
+                            except MetadataInvalidError:  # e.g. invalid versions
+                                pass
+            except Exception as e:  # pragma: no cover
+                self.errors.put(text_type(e))
+            finally:
+                # always do this, to avoid hangs :-)
+                self._to_fetch.task_done()
+            if not url:
+                #logger.debug('Sentinel seen, quitting.')
+                break
+
+    def get_page(self, url):
+        """
+        Get the HTML for an URL, possibly from an in-memory cache.
+
+        XXX TODO Note: this cache is never actually cleared. It's assumed that
+        the data won't get stale over the lifetime of a locator instance (not
+        necessarily true for the default_locator).
+        """
+        # http://peak.telecommunity.com/DevCenter/EasyInstall#package-index-api
+        scheme, netloc, path, _, _, _ = urlparse(url)
+        if scheme == 'file' and os.path.isdir(url2pathname(path)):
+            url = urljoin(ensure_slash(url), 'index.html')
+
+        if url in self._page_cache:
+            result = self._page_cache[url]
+            logger.debug('Returning %s from cache: %s', url, result)
+        else:
+            host = netloc.split(':', 1)[0]
+            result = None
+            if host in self._bad_hosts:
+                logger.debug('Skipping %s due to bad host %s', url, host)
+            else:
+                req = Request(url, headers={'Accept-encoding': 'identity'})
+                try:
+                    logger.debug('Fetching %s', url)
+                    resp = self.opener.open(req, timeout=self.timeout)
+                    logger.debug('Fetched %s', url)
+                    headers = resp.info()
+                    content_type = headers.get('Content-Type', '')
+                    if HTML_CONTENT_TYPE.match(content_type):
+                        final_url = resp.geturl()
+                        data = resp.read()
+                        encoding = headers.get('Content-Encoding')
+                        if encoding:
+                            decoder = self.decoders[encoding]   # fail if not found
+                            data = decoder(data)
+                        encoding = 'utf-8'
+                        m = CHARSET.search(content_type)
+                        if m:
+                            encoding = m.group(1)
+                        try:
+                            data = data.decode(encoding)
+                        except UnicodeError:  # pragma: no cover
+                            data = data.decode('latin-1')    # fallback
+                        result = Page(data, final_url)
+                        self._page_cache[final_url] = result
+                except HTTPError as e:
+                    if e.code != 404:
+                        logger.exception('Fetch failed: %s: %s', url, e)
+                except URLError as e:  # pragma: no cover
+                    logger.exception('Fetch failed: %s: %s', url, e)
+                    with self._lock:
+                        self._bad_hosts.add(host)
+                except Exception as e:  # pragma: no cover
+                    logger.exception('Fetch failed: %s: %s', url, e)
+                finally:
+                    self._page_cache[url] = result   # even if None (failure)
+        return result
+
+    _distname_re = re.compile('<a href=[^>]*>([^<]+)<')
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        result = set()
+        page = self.get_page(self.base_url)
+        if not page:
+            raise DistlibException('Unable to get %s' % self.base_url)
+        for match in self._distname_re.finditer(page.data):
+            result.add(match.group(1))
+        return result
+
+class DirectoryLocator(Locator):
+    """
+    This class locates distributions in a directory tree.
+    """
+
+    def __init__(self, path, **kwargs):
+        """
+        Initialise an instance.
+        :param path: The root of the directory tree to search.
+        :param kwargs: Passed to the superclass constructor,
+                       except for:
+                       * recursive - if True (the default), subdirectories are
+                         recursed into. If False, only the top-level directory
+                         is searched,
+        """
+        self.recursive = kwargs.pop('recursive', True)
+        super(DirectoryLocator, self).__init__(**kwargs)
+        path = os.path.abspath(path)
+        if not os.path.isdir(path):  # pragma: no cover
+            raise DistlibException('Not a directory: %r' % path)
+        self.base_dir = path
+
+    def should_include(self, filename, parent):
+        """
+        Should a filename be considered as a candidate for a distribution
+        archive? As well as the filename, the directory which contains it
+        is provided, though not used by the current implementation.
+        """
+        return filename.endswith(self.downloadable_extensions)
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        for root, dirs, files in os.walk(self.base_dir):
+            for fn in files:
+                if self.should_include(fn, root):
+                    fn = os.path.join(root, fn)
+                    url = urlunparse(('file', '',
+                                      pathname2url(os.path.abspath(fn)),
+                                      '', '', ''))
+                    info = self.convert_url_to_download_info(url, name)
+                    if info:
+                        self._update_version_data(result, info)
+            if not self.recursive:
+                break
+        return result
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        result = set()
+        for root, dirs, files in os.walk(self.base_dir):
+            for fn in files:
+                if self.should_include(fn, root):
+                    fn = os.path.join(root, fn)
+                    url = urlunparse(('file', '',
+                                      pathname2url(os.path.abspath(fn)),
+                                      '', '', ''))
+                    info = self.convert_url_to_download_info(url, None)
+                    if info:
+                        result.add(info['name'])
+            if not self.recursive:
+                break
+        return result
+
+class JSONLocator(Locator):
+    """
+    This locator uses special extended metadata (not available on PyPI) and is
+    the basis of performant dependency resolution in distlib. Other locators
+    require archive downloads before dependencies can be determined! As you
+    might imagine, that can be slow.
+    """
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        raise NotImplementedError('Not available from this locator')
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        data = get_project_data(name)
+        if data:
+            for info in data.get('files', []):
+                if info['ptype'] != 'sdist' or info['pyversion'] != 'source':
+                    continue
+                # We don't store summary in project metadata as it makes
+                # the data bigger for no benefit during dependency
+                # resolution
+                dist = make_dist(data['name'], info['version'],
+                                 summary=data.get('summary',
+                                                  'Placeholder for summary'),
+                                 scheme=self.scheme)
+                md = dist.metadata
+                md.source_url = info['url']
+                # TODO SHA256 digest
+                if 'digest' in info and info['digest']:
+                    dist.digest = ('md5', info['digest'])
+                md.dependencies = info.get('requirements', {})
+                dist.exports = info.get('exports', {})
+                result[dist.version] = dist
+                result['urls'].setdefault(dist.version, set()).add(info['url'])
+        return result
+
+class DistPathLocator(Locator):
+    """
+    This locator finds installed distributions in a path. It can be useful for
+    adding to an :class:`AggregatingLocator`.
+    """
+    def __init__(self, distpath, **kwargs):
+        """
+        Initialise an instance.
+
+        :param distpath: A :class:`DistributionPath` instance to search.
+        """
+        super(DistPathLocator, self).__init__(**kwargs)
+        assert isinstance(distpath, DistributionPath)
+        self.distpath = distpath
+
+    def _get_project(self, name):
+        dist = self.distpath.get_distribution(name)
+        if dist is None:
+            result = {'urls': {}, 'digests': {}}
+        else:
+            result = {
+                dist.version: dist,
+                'urls': {dist.version: set([dist.source_url])},
+                'digests': {dist.version: set([None])}
+            }
+        return result
+
+
+class AggregatingLocator(Locator):
+    """
+    This class allows you to chain and/or merge a list of locators.
+    """
+    def __init__(self, *locators, **kwargs):
+        """
+        Initialise an instance.
+
+        :param locators: The list of locators to search.
+        :param kwargs: Passed to the superclass constructor,
+                       except for:
+                       * merge - if False (the default), the first successful
+                         search from any of the locators is returned. If True,
+                         the results from all locators are merged (this can be
+                         slow).
+        """
+        self.merge = kwargs.pop('merge', False)
+        self.locators = locators
+        super(AggregatingLocator, self).__init__(**kwargs)
+
+    def clear_cache(self):
+        super(AggregatingLocator, self).clear_cache()
+        for locator in self.locators:
+            locator.clear_cache()
+
+    def _set_scheme(self, value):
+        self._scheme = value
+        for locator in self.locators:
+            locator.scheme = value
+
+    scheme = property(Locator.scheme.fget, _set_scheme)
+
+    def _get_project(self, name):
+        result = {}
+        for locator in self.locators:
+            d = locator.get_project(name)
+            if d:
+                if self.merge:
+                    files = result.get('urls', {})
+                    digests = result.get('digests', {})
+                    # next line could overwrite result['urls'], result['digests']
+                    result.update(d)
+                    df = result.get('urls')
+                    if files and df:
+                        for k, v in files.items():
+                            if k in df:
+                                df[k] |= v
+                            else:
+                                df[k] = v
+                    dd = result.get('digests')
+                    if digests and dd:
+                        dd.update(digests)
+                else:
+                    # See issue #18. If any dists are found and we're looking
+                    # for specific constraints, we only return something if
+                    # a match is found. For example, if a DirectoryLocator
+                    # returns just foo (1.0) while we're looking for
+                    # foo (>= 2.0), we'll pretend there was nothing there so
+                    # that subsequent locators can be queried. Otherwise we
+                    # would just return foo (1.0) which would then lead to a
+                    # failure to find foo (>= 2.0), because other locators
+                    # weren't searched. Note that this only matters when
+                    # merge=False.
+                    if self.matcher is None:
+                        found = True
+                    else:
+                        found = False
+                        for k in d:
+                            if self.matcher.match(k):
+                                found = True
+                                break
+                    if found:
+                        result = d
+                        break
+        return result
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        result = set()
+        for locator in self.locators:
+            try:
+                result |= locator.get_distribution_names()
+            except NotImplementedError:
+                pass
+        return result
+
+
+# We use a legacy scheme simply because most of the dists on PyPI use legacy
+# versions which don't conform to PEP 426 / PEP 440.
+default_locator = AggregatingLocator(
+                    JSONLocator(),
+                    SimpleScrapingLocator('https://pypi.org/simple/',
+                                          timeout=3.0),
+                    scheme='legacy')
+
+locate = default_locator.locate
+
+NAME_VERSION_RE = re.compile(r'(?P<name>[\w-]+)\s*'
+                             r'\(\s*(==\s*)?(?P<ver>[^)]+)\)$')
+
+class DependencyFinder(object):
+    """
+    Locate dependencies for distributions.
+    """
+
+    def __init__(self, locator=None):
+        """
+        Initialise an instance, using the specified locator
+        to locate distributions.
+        """
+        self.locator = locator or default_locator
+        self.scheme = get_scheme(self.locator.scheme)
+
+    def add_distribution(self, dist):
+        """
+        Add a distribution to the finder. This will update internal information
+        about who provides what.
+        :param dist: The distribution to add.
+        """
+        logger.debug('adding distribution %s', dist)
+        name = dist.key
+        self.dists_by_name[name] = dist
+        self.dists[(name, dist.version)] = dist
+        for p in dist.provides:
+            name, version = parse_name_and_version(p)
+            logger.debug('Add to provided: %s, %s, %s', name, version, dist)
+            self.provided.setdefault(name, set()).add((version, dist))
+
+    def remove_distribution(self, dist):
+        """
+        Remove a distribution from the finder. This will update internal
+        information about who provides what.
+        :param dist: The distribution to remove.
+        """
+        logger.debug('removing distribution %s', dist)
+        name = dist.key
+        del self.dists_by_name[name]
+        del self.dists[(name, dist.version)]
+        for p in dist.provides:
+            name, version = parse_name_and_version(p)
+            logger.debug('Remove from provided: %s, %s, %s', name, version, dist)
+            s = self.provided[name]
+            s.remove((version, dist))
+            if not s:
+                del self.provided[name]
+
+    def get_matcher(self, reqt):
+        """
+        Get a version matcher for a requirement.
+        :param reqt: The requirement
+        :type reqt: str
+        :return: A version matcher (an instance of
+                 :class:`distlib.version.Matcher`).
+        """
+        try:
+            matcher = self.scheme.matcher(reqt)
+        except UnsupportedVersionError:  # pragma: no cover
+            # XXX compat-mode if cannot read the version
+            name = reqt.split()[0]
+            matcher = self.scheme.matcher(name)
+        return matcher
+
+    def find_providers(self, reqt):
+        """
+        Find the distributions which can fulfill a requirement.
+
+        :param reqt: The requirement.
+         :type reqt: str
+        :return: A set of distribution which can fulfill the requirement.
+        """
+        matcher = self.get_matcher(reqt)
+        name = matcher.key   # case-insensitive
+        result = set()
+        provided = self.provided
+        if name in provided:
+            for version, provider in provided[name]:
+                try:
+                    match = matcher.match(version)
+                except UnsupportedVersionError:
+                    match = False
+
+                if match:
+                    result.add(provider)
+                    break
+        return result
+
+    def try_to_replace(self, provider, other, problems):
+        """
+        Attempt to replace one provider with another. This is typically used
+        when resolving dependencies from multiple sources, e.g. A requires
+        (B >= 1.0) while C requires (B >= 1.1).
+
+        For successful replacement, ``provider`` must meet all the requirements
+        which ``other`` fulfills.
+
+        :param provider: The provider we are trying to replace with.
+        :param other: The provider we're trying to replace.
+        :param problems: If False is returned, this will contain what
+                         problems prevented replacement. This is currently
+                         a tuple of the literal string 'cantreplace',
+                         ``provider``, ``other``  and the set of requirements
+                         that ``provider`` couldn't fulfill.
+        :return: True if we can replace ``other`` with ``provider``, else
+                 False.
+        """
+        rlist = self.reqts[other]
+        unmatched = set()
+        for s in rlist:
+            matcher = self.get_matcher(s)
+            if not matcher.match(provider.version):
+                unmatched.add(s)
+        if unmatched:
+            # can't replace other with provider
+            problems.add(('cantreplace', provider, other,
+                          frozenset(unmatched)))
+            result = False
+        else:
+            # can replace other with provider
+            self.remove_distribution(other)
+            del self.reqts[other]
+            for s in rlist:
+                self.reqts.setdefault(provider, set()).add(s)
+            self.add_distribution(provider)
+            result = True
+        return result
+
+    def find(self, requirement, meta_extras=None, prereleases=False):
+        """
+        Find a distribution and all distributions it depends on.
+
+        :param requirement: The requirement specifying the distribution to
+                            find, or a Distribution instance.
+        :param meta_extras: A list of meta extras such as :test:, :build: and
+                            so on.
+        :param prereleases: If ``True``, allow pre-release versions to be
+                            returned - otherwise, don't return prereleases
+                            unless they're all that's available.
+
+        Return a set of :class:`Distribution` instances and a set of
+        problems.
+
+        The distributions returned should be such that they have the
+        :attr:`required` attribute set to ``True`` if they were
+        from the ``requirement`` passed to ``find()``, and they have the
+        :attr:`build_time_dependency` attribute set to ``True`` unless they
+        are post-installation dependencies of the ``requirement``.
+
+        The problems should be a tuple consisting of the string
+        ``'unsatisfied'`` and the requirement which couldn't be satisfied
+        by any distribution known to the locator.
+        """
+
+        self.provided = {}
+        self.dists = {}
+        self.dists_by_name = {}
+        self.reqts = {}
+
+        meta_extras = set(meta_extras or [])
+        if ':*:' in meta_extras:
+            meta_extras.remove(':*:')
+            # :meta: and :run: are implicitly included
+            meta_extras |= set([':test:', ':build:', ':dev:'])
+
+        if isinstance(requirement, Distribution):
+            dist = odist = requirement
+            logger.debug('passed %s as requirement', odist)
+        else:
+            dist = odist = self.locator.locate(requirement,
+                                               prereleases=prereleases)
+            if dist is None:
+                raise DistlibException('Unable to locate %r' % requirement)
+            logger.debug('located %s', odist)
+        dist.requested = True
+        problems = set()
+        todo = set([dist])
+        install_dists = set([odist])
+        while todo:
+            dist = todo.pop()
+            name = dist.key     # case-insensitive
+            if name not in self.dists_by_name:
+                self.add_distribution(dist)
+            else:
+                #import pdb; pdb.set_trace()
+                other = self.dists_by_name[name]
+                if other != dist:
+                    self.try_to_replace(dist, other, problems)
+
+            ireqts = dist.run_requires | dist.meta_requires
+            sreqts = dist.build_requires
+            ereqts = set()
+            if meta_extras and dist in install_dists:
+                for key in ('test', 'build', 'dev'):
+                    e = ':%s:' % key
+                    if e in meta_extras:
+                        ereqts |= getattr(dist, '%s_requires' % key)
+            all_reqts = ireqts | sreqts | ereqts
+            for r in all_reqts:
+                providers = self.find_providers(r)
+                if not providers:
+                    logger.debug('No providers found for %r', r)
+                    provider = self.locator.locate(r, prereleases=prereleases)
+                    # If no provider is found and we didn't consider
+                    # prereleases, consider them now.
+                    if provider is None and not prereleases:
+                        provider = self.locator.locate(r, prereleases=True)
+                    if provider is None:
+                        logger.debug('Cannot satisfy %r', r)
+                        problems.add(('unsatisfied', r))
+                    else:
+                        n, v = provider.key, provider.version
+                        if (n, v) not in self.dists:
+                            todo.add(provider)
+                        providers.add(provider)
+                        if r in ireqts and dist in install_dists:
+                            install_dists.add(provider)
+                            logger.debug('Adding %s to install_dists',
+                                         provider.name_and_version)
+                for p in providers:
+                    name = p.key
+                    if name not in self.dists_by_name:
+                        self.reqts.setdefault(p, set()).add(r)
+                    else:
+                        other = self.dists_by_name[name]
+                        if other != p:
+                            # see if other can be replaced by p
+                            self.try_to_replace(p, other, problems)
+
+        dists = set(self.dists.values())
+        for dist in dists:
+            dist.build_time_dependency = dist not in install_dists
+            if dist.build_time_dependency:
+                logger.debug('%s is a build-time dependency only.',
+                             dist.name_and_version)
+        logger.debug('find done for %s', odist)
+        return dists, problems
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/manifest.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/manifest.py
new file mode 100644
index 0000000..ca0fe44
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/manifest.py
@@ -0,0 +1,393 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2013 Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""
+Class representing the list of files in a distribution.
+
+Equivalent to distutils.filelist, but fixes some problems.
+"""
+import fnmatch
+import logging
+import os
+import re
+import sys
+
+from . import DistlibException
+from .compat import fsdecode
+from .util import convert_path
+
+
+__all__ = ['Manifest']
+
+logger = logging.getLogger(__name__)
+
+# a \ followed by some spaces + EOL
+_COLLAPSE_PATTERN = re.compile('\\\\w*\n', re.M)
+_COMMENTED_LINE = re.compile('#.*?(?=\n)|\n(?=$)', re.M | re.S)
+
+#
+# Due to the different results returned by fnmatch.translate, we need
+# to do slightly different processing for Python 2.7 and 3.2 ... this needed
+# to be brought in for Python 3.6 onwards.
+#
+_PYTHON_VERSION = sys.version_info[:2]
+
+class Manifest(object):
+    """A list of files built by on exploring the filesystem and filtered by
+    applying various patterns to what we find there.
+    """
+
+    def __init__(self, base=None):
+        """
+        Initialise an instance.
+
+        :param base: The base directory to explore under.
+        """
+        self.base = os.path.abspath(os.path.normpath(base or os.getcwd()))
+        self.prefix = self.base + os.sep
+        self.allfiles = None
+        self.files = set()
+
+    #
+    # Public API
+    #
+
+    def findall(self):
+        """Find all files under the base and set ``allfiles`` to the absolute
+        pathnames of files found.
+        """
+        from stat import S_ISREG, S_ISDIR, S_ISLNK
+
+        self.allfiles = allfiles = []
+        root = self.base
+        stack = [root]
+        pop = stack.pop
+        push = stack.append
+
+        while stack:
+            root = pop()
+            names = os.listdir(root)
+
+            for name in names:
+                fullname = os.path.join(root, name)
+
+                # Avoid excess stat calls -- just one will do, thank you!
+                stat = os.stat(fullname)
+                mode = stat.st_mode
+                if S_ISREG(mode):
+                    allfiles.append(fsdecode(fullname))
+                elif S_ISDIR(mode) and not S_ISLNK(mode):
+                    push(fullname)
+
+    def add(self, item):
+        """
+        Add a file to the manifest.
+
+        :param item: The pathname to add. This can be relative to the base.
+        """
+        if not item.startswith(self.prefix):
+            item = os.path.join(self.base, item)
+        self.files.add(os.path.normpath(item))
+
+    def add_many(self, items):
+        """
+        Add a list of files to the manifest.
+
+        :param items: The pathnames to add. These can be relative to the base.
+        """
+        for item in items:
+            self.add(item)
+
+    def sorted(self, wantdirs=False):
+        """
+        Return sorted files in directory order
+        """
+
+        def add_dir(dirs, d):
+            dirs.add(d)
+            logger.debug('add_dir added %s', d)
+            if d != self.base:
+                parent, _ = os.path.split(d)
+                assert parent not in ('', '/')
+                add_dir(dirs, parent)
+
+        result = set(self.files)    # make a copy!
+        if wantdirs:
+            dirs = set()
+            for f in result:
+                add_dir(dirs, os.path.dirname(f))
+            result |= dirs
+        return [os.path.join(*path_tuple) for path_tuple in
+                sorted(os.path.split(path) for path in result)]
+
+    def clear(self):
+        """Clear all collected files."""
+        self.files = set()
+        self.allfiles = []
+
+    def process_directive(self, directive):
+        """
+        Process a directive which either adds some files from ``allfiles`` to
+        ``files``, or removes some files from ``files``.
+
+        :param directive: The directive to process. This should be in a format
+                     compatible with distutils ``MANIFEST.in`` files:
+
+                     http://docs.python.org/distutils/sourcedist.html#commands
+        """
+        # Parse the line: split it up, make sure the right number of words
+        # is there, and return the relevant words.  'action' is always
+        # defined: it's the first word of the line.  Which of the other
+        # three are defined depends on the action; it'll be either
+        # patterns, (dir and patterns), or (dirpattern).
+        action, patterns, thedir, dirpattern = self._parse_directive(directive)
+
+        # OK, now we know that the action is valid and we have the
+        # right number of words on the line for that action -- so we
+        # can proceed with minimal error-checking.
+        if action == 'include':
+            for pattern in patterns:
+                if not self._include_pattern(pattern, anchor=True):
+                    logger.warning('no files found matching %r', pattern)
+
+        elif action == 'exclude':
+            for pattern in patterns:
+                found = self._exclude_pattern(pattern, anchor=True)
+                #if not found:
+                #    logger.warning('no previously-included files '
+                #                   'found matching %r', pattern)
+
+        elif action == 'global-include':
+            for pattern in patterns:
+                if not self._include_pattern(pattern, anchor=False):
+                    logger.warning('no files found matching %r '
+                                   'anywhere in distribution', pattern)
+
+        elif action == 'global-exclude':
+            for pattern in patterns:
+                found = self._exclude_pattern(pattern, anchor=False)
+                #if not found:
+                #    logger.warning('no previously-included files '
+                #                   'matching %r found anywhere in '
+                #                   'distribution', pattern)
+
+        elif action == 'recursive-include':
+            for pattern in patterns:
+                if not self._include_pattern(pattern, prefix=thedir):
+                    logger.warning('no files found matching %r '
+                                   'under directory %r', pattern, thedir)
+
+        elif action == 'recursive-exclude':
+            for pattern in patterns:
+                found = self._exclude_pattern(pattern, prefix=thedir)
+                #if not found:
+                #    logger.warning('no previously-included files '
+                #                   'matching %r found under directory %r',
+                #                   pattern, thedir)
+
+        elif action == 'graft':
+            if not self._include_pattern(None, prefix=dirpattern):
+                logger.warning('no directories found matching %r',
+                               dirpattern)
+
+        elif action == 'prune':
+            if not self._exclude_pattern(None, prefix=dirpattern):
+                logger.warning('no previously-included directories found '
+                               'matching %r', dirpattern)
+        else:   # pragma: no cover
+            # This should never happen, as it should be caught in
+            # _parse_template_line
+            raise DistlibException(
+                'invalid action %r' % action)
+
+    #
+    # Private API
+    #
+
+    def _parse_directive(self, directive):
+        """
+        Validate a directive.
+        :param directive: The directive to validate.
+        :return: A tuple of action, patterns, thedir, dir_patterns
+        """
+        words = directive.split()
+        if len(words) == 1 and words[0] not in ('include', 'exclude',
+                                                'global-include',
+                                                'global-exclude',
+                                                'recursive-include',
+                                                'recursive-exclude',
+                                                'graft', 'prune'):
+            # no action given, let's use the default 'include'
+            words.insert(0, 'include')
+
+        action = words[0]
+        patterns = thedir = dir_pattern = None
+
+        if action in ('include', 'exclude',
+                      'global-include', 'global-exclude'):
+            if len(words) < 2:
+                raise DistlibException(
+                    '%r expects <pattern1> <pattern2> ...' % action)
+
+            patterns = [convert_path(word) for word in words[1:]]
+
+        elif action in ('recursive-include', 'recursive-exclude'):
+            if len(words) < 3:
+                raise DistlibException(
+                    '%r expects <dir> <pattern1> <pattern2> ...' % action)
+
+            thedir = convert_path(words[1])
+            patterns = [convert_path(word) for word in words[2:]]
+
+        elif action in ('graft', 'prune'):
+            if len(words) != 2:
+                raise DistlibException(
+                    '%r expects a single <dir_pattern>' % action)
+
+            dir_pattern = convert_path(words[1])
+
+        else:
+            raise DistlibException('unknown action %r' % action)
+
+        return action, patterns, thedir, dir_pattern
+
+    def _include_pattern(self, pattern, anchor=True, prefix=None,
+                         is_regex=False):
+        """Select strings (presumably filenames) from 'self.files' that
+        match 'pattern', a Unix-style wildcard (glob) pattern.
+
+        Patterns are not quite the same as implemented by the 'fnmatch'
+        module: '*' and '?'  match non-special characters, where "special"
+        is platform-dependent: slash on Unix; colon, slash, and backslash on
+        DOS/Windows; and colon on Mac OS.
+
+        If 'anchor' is true (the default), then the pattern match is more
+        stringent: "*.py" will match "foo.py" but not "foo/bar.py".  If
+        'anchor' is false, both of these will match.
+
+        If 'prefix' is supplied, then only filenames starting with 'prefix'
+        (itself a pattern) and ending with 'pattern', with anything in between
+        them, will match.  'anchor' is ignored in this case.
+
+        If 'is_regex' is true, 'anchor' and 'prefix' are ignored, and
+        'pattern' is assumed to be either a string containing a regex or a
+        regex object -- no translation is done, the regex is just compiled
+        and used as-is.
+
+        Selected strings will be added to self.files.
+
+        Return True if files are found.
+        """
+        # XXX docstring lying about what the special chars are?
+        found = False
+        pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
+
+        # delayed loading of allfiles list
+        if self.allfiles is None:
+            self.findall()
+
+        for name in self.allfiles:
+            if pattern_re.search(name):
+                self.files.add(name)
+                found = True
+        return found
+
+    def _exclude_pattern(self, pattern, anchor=True, prefix=None,
+                         is_regex=False):
+        """Remove strings (presumably filenames) from 'files' that match
+        'pattern'.
+
+        Other parameters are the same as for 'include_pattern()', above.
+        The list 'self.files' is modified in place. Return True if files are
+        found.
+
+        This API is public to allow e.g. exclusion of SCM subdirs, e.g. when
+        packaging source distributions
+        """
+        found = False
+        pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
+        for f in list(self.files):
+            if pattern_re.search(f):
+                self.files.remove(f)
+                found = True
+        return found
+
+    def _translate_pattern(self, pattern, anchor=True, prefix=None,
+                           is_regex=False):
+        """Translate a shell-like wildcard pattern to a compiled regular
+        expression.
+
+        Return the compiled regex.  If 'is_regex' true,
+        then 'pattern' is directly compiled to a regex (if it's a string)
+        or just returned as-is (assumes it's a regex object).
+        """
+        if is_regex:
+            if isinstance(pattern, str):
+                return re.compile(pattern)
+            else:
+                return pattern
+
+        if _PYTHON_VERSION > (3, 2):
+            # ditch start and end characters
+            start, _, end = self._glob_to_re('_').partition('_')
+
+        if pattern:
+            pattern_re = self._glob_to_re(pattern)
+            if _PYTHON_VERSION > (3, 2):
+                assert pattern_re.startswith(start) and pattern_re.endswith(end)
+        else:
+            pattern_re = ''
+
+        base = re.escape(os.path.join(self.base, ''))
+        if prefix is not None:
+            # ditch end of pattern character
+            if _PYTHON_VERSION <= (3, 2):
+                empty_pattern = self._glob_to_re('')
+                prefix_re = self._glob_to_re(prefix)[:-len(empty_pattern)]
+            else:
+                prefix_re = self._glob_to_re(prefix)
+                assert prefix_re.startswith(start) and prefix_re.endswith(end)
+                prefix_re = prefix_re[len(start): len(prefix_re) - len(end)]
+            sep = os.sep
+            if os.sep == '\\':
+                sep = r'\\'
+            if _PYTHON_VERSION <= (3, 2):
+                pattern_re = '^' + base + sep.join((prefix_re,
+                                                    '.*' + pattern_re))
+            else:
+                pattern_re = pattern_re[len(start): len(pattern_re) - len(end)]
+                pattern_re = r'%s%s%s%s.*%s%s' % (start, base, prefix_re, sep,
+                                                  pattern_re, end)
+        else:  # no prefix -- respect anchor flag
+            if anchor:
+                if _PYTHON_VERSION <= (3, 2):
+                    pattern_re = '^' + base + pattern_re
+                else:
+                    pattern_re = r'%s%s%s' % (start, base, pattern_re[len(start):])
+
+        return re.compile(pattern_re)
+
+    def _glob_to_re(self, pattern):
+        """Translate a shell-like glob pattern to a regular expression.
+
+        Return a string containing the regex.  Differs from
+        'fnmatch.translate()' in that '*' does not match "special characters"
+        (which are platform-specific).
+        """
+        pattern_re = fnmatch.translate(pattern)
+
+        # '?' and '*' in the glob pattern become '.' and '.*' in the RE, which
+        # IMHO is wrong -- '?' and '*' aren't supposed to match slash in Unix,
+        # and by extension they shouldn't match such "special characters" under
+        # any OS.  So change all non-escaped dots in the RE to match any
+        # character except the special characters (currently: just os.sep).
+        sep = os.sep
+        if os.sep == '\\':
+            # we're using a regex to manipulate a regex, so we need
+            # to escape the backslash twice
+            sep = r'\\\\'
+        escaped = r'\1[^%s]' % sep
+        pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', escaped, pattern_re)
+        return pattern_re
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/markers.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/markers.py
new file mode 100644
index 0000000..ee1f3e2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/markers.py
@@ -0,0 +1,131 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""
+Parser for the environment markers micro-language defined in PEP 508.
+"""
+
+# Note: In PEP 345, the micro-language was Python compatible, so the ast
+# module could be used to parse it. However, PEP 508 introduced operators such
+# as ~= and === which aren't in Python, necessitating a different approach.
+
+import os
+import sys
+import platform
+import re
+
+from .compat import python_implementation, urlparse, string_types
+from .util import in_venv, parse_marker
+
+__all__ = ['interpret']
+
+def _is_literal(o):
+    if not isinstance(o, string_types) or not o:
+        return False
+    return o[0] in '\'"'
+
+class Evaluator(object):
+    """
+    This class is used to evaluate marker expessions.
+    """
+
+    operations = {
+        '==': lambda x, y: x == y,
+        '===': lambda x, y: x == y,
+        '~=': lambda x, y: x == y or x > y,
+        '!=': lambda x, y: x != y,
+        '<':  lambda x, y: x < y,
+        '<=':  lambda x, y: x == y or x < y,
+        '>':  lambda x, y: x > y,
+        '>=':  lambda x, y: x == y or x > y,
+        'and': lambda x, y: x and y,
+        'or': lambda x, y: x or y,
+        'in': lambda x, y: x in y,
+        'not in': lambda x, y: x not in y,
+    }
+
+    def evaluate(self, expr, context):
+        """
+        Evaluate a marker expression returned by the :func:`parse_requirement`
+        function in the specified context.
+        """
+        if isinstance(expr, string_types):
+            if expr[0] in '\'"':
+                result = expr[1:-1]
+            else:
+                if expr not in context:
+                    raise SyntaxError('unknown variable: %s' % expr)
+                result = context[expr]
+        else:
+            assert isinstance(expr, dict)
+            op = expr['op']
+            if op not in self.operations:
+                raise NotImplementedError('op not implemented: %s' % op)
+            elhs = expr['lhs']
+            erhs = expr['rhs']
+            if _is_literal(expr['lhs']) and _is_literal(expr['rhs']):
+                raise SyntaxError('invalid comparison: %s %s %s' % (elhs, op, erhs))
+
+            lhs = self.evaluate(elhs, context)
+            rhs = self.evaluate(erhs, context)
+            result = self.operations[op](lhs, rhs)
+        return result
+
+def default_context():
+    def format_full_version(info):
+        version = '%s.%s.%s' % (info.major, info.minor, info.micro)
+        kind = info.releaselevel
+        if kind != 'final':
+            version += kind[0] + str(info.serial)
+        return version
+
+    if hasattr(sys, 'implementation'):
+        implementation_version = format_full_version(sys.implementation.version)
+        implementation_name = sys.implementation.name
+    else:
+        implementation_version = '0'
+        implementation_name = ''
+
+    result = {
+        'implementation_name': implementation_name,
+        'implementation_version': implementation_version,
+        'os_name': os.name,
+        'platform_machine': platform.machine(),
+        'platform_python_implementation': platform.python_implementation(),
+        'platform_release': platform.release(),
+        'platform_system': platform.system(),
+        'platform_version': platform.version(),
+        'platform_in_venv': str(in_venv()),
+        'python_full_version': platform.python_version(),
+        'python_version': platform.python_version()[:3],
+        'sys_platform': sys.platform,
+    }
+    return result
+
+DEFAULT_CONTEXT = default_context()
+del default_context
+
+evaluator = Evaluator()
+
+def interpret(marker, execution_context=None):
+    """
+    Interpret a marker and return a result depending on environment.
+
+    :param marker: The marker to interpret.
+    :type marker: str
+    :param execution_context: The context used for name lookup.
+    :type execution_context: mapping
+    """
+    try:
+        expr, rest = parse_marker(marker)
+    except Exception as e:
+        raise SyntaxError('Unable to interpret marker syntax: %s: %s' % (marker, e))
+    if rest and rest[0] != '#':
+        raise SyntaxError('unexpected trailing data in marker: %s: %s' % (marker, rest))
+    context = dict(DEFAULT_CONTEXT)
+    if execution_context:
+        context.update(execution_context)
+    return evaluator.evaluate(expr, context)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/metadata.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/metadata.py
new file mode 100644
index 0000000..6d5e236
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/metadata.py
@@ -0,0 +1,1056 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""Implementation of the Metadata for Python packages PEPs.
+
+Supports all metadata formats (1.0, 1.1, 1.2, 1.3/2.1 and withdrawn 2.0).
+"""
+from __future__ import unicode_literals
+
+import codecs
+from email import message_from_file
+import json
+import logging
+import re
+
+
+from . import DistlibException, __version__
+from .compat import StringIO, string_types, text_type
+from .markers import interpret
+from .util import extract_by_key, get_extras
+from .version import get_scheme, PEP440_VERSION_RE
+
+logger = logging.getLogger(__name__)
+
+
+class MetadataMissingError(DistlibException):
+    """A required metadata is missing"""
+
+
+class MetadataConflictError(DistlibException):
+    """Attempt to read or write metadata fields that are conflictual."""
+
+
+class MetadataUnrecognizedVersionError(DistlibException):
+    """Unknown metadata version number."""
+
+
+class MetadataInvalidError(DistlibException):
+    """A metadata value is invalid"""
+
+# public API of this module
+__all__ = ['Metadata', 'PKG_INFO_ENCODING', 'PKG_INFO_PREFERRED_VERSION']
+
+# Encoding used for the PKG-INFO files
+PKG_INFO_ENCODING = 'utf-8'
+
+# preferred version. Hopefully will be changed
+# to 1.2 once PEP 345 is supported everywhere
+PKG_INFO_PREFERRED_VERSION = '1.1'
+
+_LINE_PREFIX_1_2 = re.compile('\n       \\|')
+_LINE_PREFIX_PRE_1_2 = re.compile('\n        ')
+_241_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'License')
+
+_314_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Supported-Platform', 'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'License', 'Classifier', 'Download-URL', 'Obsoletes',
+               'Provides', 'Requires')
+
+_314_MARKERS = ('Obsoletes', 'Provides', 'Requires', 'Classifier',
+                'Download-URL')
+
+_345_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Supported-Platform', 'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'Maintainer', 'Maintainer-email', 'License',
+               'Classifier', 'Download-URL', 'Obsoletes-Dist',
+               'Project-URL', 'Provides-Dist', 'Requires-Dist',
+               'Requires-Python', 'Requires-External')
+
+_345_MARKERS = ('Provides-Dist', 'Requires-Dist', 'Requires-Python',
+                'Obsoletes-Dist', 'Requires-External', 'Maintainer',
+                'Maintainer-email', 'Project-URL')
+
+_426_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Supported-Platform', 'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'Maintainer', 'Maintainer-email', 'License',
+               'Classifier', 'Download-URL', 'Obsoletes-Dist',
+               'Project-URL', 'Provides-Dist', 'Requires-Dist',
+               'Requires-Python', 'Requires-External', 'Private-Version',
+               'Obsoleted-By', 'Setup-Requires-Dist', 'Extension',
+               'Provides-Extra')
+
+_426_MARKERS = ('Private-Version', 'Provides-Extra', 'Obsoleted-By',
+                'Setup-Requires-Dist', 'Extension')
+
+# See issue #106: Sometimes 'Requires' and 'Provides' occur wrongly in
+# the metadata. Include them in the tuple literal below to allow them
+# (for now).
+_566_FIELDS = _426_FIELDS + ('Description-Content-Type',
+                             'Requires', 'Provides')
+
+_566_MARKERS = ('Description-Content-Type',)
+
+_ALL_FIELDS = set()
+_ALL_FIELDS.update(_241_FIELDS)
+_ALL_FIELDS.update(_314_FIELDS)
+_ALL_FIELDS.update(_345_FIELDS)
+_ALL_FIELDS.update(_426_FIELDS)
+_ALL_FIELDS.update(_566_FIELDS)
+
+EXTRA_RE = re.compile(r'''extra\s*==\s*("([^"]+)"|'([^']+)')''')
+
+
+def _version2fieldlist(version):
+    if version == '1.0':
+        return _241_FIELDS
+    elif version == '1.1':
+        return _314_FIELDS
+    elif version == '1.2':
+        return _345_FIELDS
+    elif version in ('1.3', '2.1'):
+        return _345_FIELDS + _566_FIELDS
+    elif version == '2.0':
+        return _426_FIELDS
+    raise MetadataUnrecognizedVersionError(version)
+
+
+def _best_version(fields):
+    """Detect the best version depending on the fields used."""
+    def _has_marker(keys, markers):
+        for marker in markers:
+            if marker in keys:
+                return True
+        return False
+
+    keys = []
+    for key, value in fields.items():
+        if value in ([], 'UNKNOWN', None):
+            continue
+        keys.append(key)
+
+    possible_versions = ['1.0', '1.1', '1.2', '1.3', '2.0', '2.1']
+
+    # first let's try to see if a field is not part of one of the version
+    for key in keys:
+        if key not in _241_FIELDS and '1.0' in possible_versions:
+            possible_versions.remove('1.0')
+            logger.debug('Removed 1.0 due to %s', key)
+        if key not in _314_FIELDS and '1.1' in possible_versions:
+            possible_versions.remove('1.1')
+            logger.debug('Removed 1.1 due to %s', key)
+        if key not in _345_FIELDS and '1.2' in possible_versions:
+            possible_versions.remove('1.2')
+            logger.debug('Removed 1.2 due to %s', key)
+        if key not in _566_FIELDS and '1.3' in possible_versions:
+            possible_versions.remove('1.3')
+            logger.debug('Removed 1.3 due to %s', key)
+        if key not in _566_FIELDS and '2.1' in possible_versions:
+            if key != 'Description':  # In 2.1, description allowed after headers
+                possible_versions.remove('2.1')
+                logger.debug('Removed 2.1 due to %s', key)
+        if key not in _426_FIELDS and '2.0' in possible_versions:
+            possible_versions.remove('2.0')
+            logger.debug('Removed 2.0 due to %s', key)
+
+    # possible_version contains qualified versions
+    if len(possible_versions) == 1:
+        return possible_versions[0]   # found !
+    elif len(possible_versions) == 0:
+        logger.debug('Out of options - unknown metadata set: %s', fields)
+        raise MetadataConflictError('Unknown metadata set')
+
+    # let's see if one unique marker is found
+    is_1_1 = '1.1' in possible_versions and _has_marker(keys, _314_MARKERS)
+    is_1_2 = '1.2' in possible_versions and _has_marker(keys, _345_MARKERS)
+    is_2_1 = '2.1' in possible_versions and _has_marker(keys, _566_MARKERS)
+    is_2_0 = '2.0' in possible_versions and _has_marker(keys, _426_MARKERS)
+    if int(is_1_1) + int(is_1_2) + int(is_2_1) + int(is_2_0) > 1:
+        raise MetadataConflictError('You used incompatible 1.1/1.2/2.0/2.1 fields')
+
+    # we have the choice, 1.0, or 1.2, or 2.0
+    #   - 1.0 has a broken Summary field but works with all tools
+    #   - 1.1 is to avoid
+    #   - 1.2 fixes Summary but has little adoption
+    #   - 2.0 adds more features and is very new
+    if not is_1_1 and not is_1_2 and not is_2_1 and not is_2_0:
+        # we couldn't find any specific marker
+        if PKG_INFO_PREFERRED_VERSION in possible_versions:
+            return PKG_INFO_PREFERRED_VERSION
+    if is_1_1:
+        return '1.1'
+    if is_1_2:
+        return '1.2'
+    if is_2_1:
+        return '2.1'
+
+    return '2.0'
+
+# This follows the rules about transforming keys as described in
+# https://www.python.org/dev/peps/pep-0566/#id17
+_ATTR2FIELD = {
+    name.lower().replace("-", "_"): name for name in _ALL_FIELDS
+}
+_FIELD2ATTR = {field: attr for attr, field in _ATTR2FIELD.items()}
+
+_PREDICATE_FIELDS = ('Requires-Dist', 'Obsoletes-Dist', 'Provides-Dist')
+_VERSIONS_FIELDS = ('Requires-Python',)
+_VERSION_FIELDS = ('Version',)
+_LISTFIELDS = ('Platform', 'Classifier', 'Obsoletes',
+               'Requires', 'Provides', 'Obsoletes-Dist',
+               'Provides-Dist', 'Requires-Dist', 'Requires-External',
+               'Project-URL', 'Supported-Platform', 'Setup-Requires-Dist',
+               'Provides-Extra', 'Extension')
+_LISTTUPLEFIELDS = ('Project-URL',)
+
+_ELEMENTSFIELD = ('Keywords',)
+
+_UNICODEFIELDS = ('Author', 'Maintainer', 'Summary', 'Description')
+
+_MISSING = object()
+
+_FILESAFE = re.compile('[^A-Za-z0-9.]+')
+
+
+def _get_name_and_version(name, version, for_filename=False):
+    """Return the distribution name with version.
+
+    If for_filename is true, return a filename-escaped form."""
+    if for_filename:
+        # For both name and version any runs of non-alphanumeric or '.'
+        # characters are replaced with a single '-'.  Additionally any
+        # spaces in the version string become '.'
+        name = _FILESAFE.sub('-', name)
+        version = _FILESAFE.sub('-', version.replace(' ', '.'))
+    return '%s-%s' % (name, version)
+
+
+class LegacyMetadata(object):
+    """The legacy metadata of a release.
+
+    Supports versions 1.0, 1.1, 1.2, 2.0 and 1.3/2.1 (auto-detected). You can
+    instantiate the class with one of these arguments (or none):
+    - *path*, the path to a metadata file
+    - *fileobj* give a file-like object with metadata as content
+    - *mapping* is a dict-like object
+    - *scheme* is a version scheme name
+    """
+    # TODO document the mapping API and UNKNOWN default key
+
+    def __init__(self, path=None, fileobj=None, mapping=None,
+                 scheme='default'):
+        if [path, fileobj, mapping].count(None) < 2:
+            raise TypeError('path, fileobj and mapping are exclusive')
+        self._fields = {}
+        self.requires_files = []
+        self._dependencies = None
+        self.scheme = scheme
+        if path is not None:
+            self.read(path)
+        elif fileobj is not None:
+            self.read_file(fileobj)
+        elif mapping is not None:
+            self.update(mapping)
+            self.set_metadata_version()
+
+    def set_metadata_version(self):
+        self._fields['Metadata-Version'] = _best_version(self._fields)
+
+    def _write_field(self, fileobj, name, value):
+        fileobj.write('%s: %s\n' % (name, value))
+
+    def __getitem__(self, name):
+        return self.get(name)
+
+    def __setitem__(self, name, value):
+        return self.set(name, value)
+
+    def __delitem__(self, name):
+        field_name = self._convert_name(name)
+        try:
+            del self._fields[field_name]
+        except KeyError:
+            raise KeyError(name)
+
+    def __contains__(self, name):
+        return (name in self._fields or
+                self._convert_name(name) in self._fields)
+
+    def _convert_name(self, name):
+        if name in _ALL_FIELDS:
+            return name
+        name = name.replace('-', '_').lower()
+        return _ATTR2FIELD.get(name, name)
+
+    def _default_value(self, name):
+        if name in _LISTFIELDS or name in _ELEMENTSFIELD:
+            return []
+        return 'UNKNOWN'
+
+    def _remove_line_prefix(self, value):
+        if self.metadata_version in ('1.0', '1.1'):
+            return _LINE_PREFIX_PRE_1_2.sub('\n', value)
+        else:
+            return _LINE_PREFIX_1_2.sub('\n', value)
+
+    def __getattr__(self, name):
+        if name in _ATTR2FIELD:
+            return self[name]
+        raise AttributeError(name)
+
+    #
+    # Public API
+    #
+
+#    dependencies = property(_get_dependencies, _set_dependencies)
+
+    def get_fullname(self, filesafe=False):
+        """Return the distribution name with version.
+
+        If filesafe is true, return a filename-escaped form."""
+        return _get_name_and_version(self['Name'], self['Version'], filesafe)
+
+    def is_field(self, name):
+        """return True if name is a valid metadata key"""
+        name = self._convert_name(name)
+        return name in _ALL_FIELDS
+
+    def is_multi_field(self, name):
+        name = self._convert_name(name)
+        return name in _LISTFIELDS
+
+    def read(self, filepath):
+        """Read the metadata values from a file path."""
+        fp = codecs.open(filepath, 'r', encoding='utf-8')
+        try:
+            self.read_file(fp)
+        finally:
+            fp.close()
+
+    def read_file(self, fileob):
+        """Read the metadata values from a file object."""
+        msg = message_from_file(fileob)
+        self._fields['Metadata-Version'] = msg['metadata-version']
+
+        # When reading, get all the fields we can
+        for field in _ALL_FIELDS:
+            if field not in msg:
+                continue
+            if field in _LISTFIELDS:
+                # we can have multiple lines
+                values = msg.get_all(field)
+                if field in _LISTTUPLEFIELDS and values is not None:
+                    values = [tuple(value.split(',')) for value in values]
+                self.set(field, values)
+            else:
+                # single line
+                value = msg[field]
+                if value is not None and value != 'UNKNOWN':
+                    self.set(field, value)
+
+        # PEP 566 specifies that the body be used for the description, if
+        # available
+        body = msg.get_payload()
+        self["Description"] = body if body else self["Description"]
+        # logger.debug('Attempting to set metadata for %s', self)
+        # self.set_metadata_version()
+
+    def write(self, filepath, skip_unknown=False):
+        """Write the metadata fields to filepath."""
+        fp = codecs.open(filepath, 'w', encoding='utf-8')
+        try:
+            self.write_file(fp, skip_unknown)
+        finally:
+            fp.close()
+
+    def write_file(self, fileobject, skip_unknown=False):
+        """Write the PKG-INFO format data to a file object."""
+        self.set_metadata_version()
+
+        for field in _version2fieldlist(self['Metadata-Version']):
+            values = self.get(field)
+            if skip_unknown and values in ('UNKNOWN', [], ['UNKNOWN']):
+                continue
+            if field in _ELEMENTSFIELD:
+                self._write_field(fileobject, field, ','.join(values))
+                continue
+            if field not in _LISTFIELDS:
+                if field == 'Description':
+                    if self.metadata_version in ('1.0', '1.1'):
+                        values = values.replace('\n', '\n        ')
+                    else:
+                        values = values.replace('\n', '\n       |')
+                values = [values]
+
+            if field in _LISTTUPLEFIELDS:
+                values = [','.join(value) for value in values]
+
+            for value in values:
+                self._write_field(fileobject, field, value)
+
+    def update(self, other=None, **kwargs):
+        """Set metadata values from the given iterable `other` and kwargs.
+
+        Behavior is like `dict.update`: If `other` has a ``keys`` method,
+        they are looped over and ``self[key]`` is assigned ``other[key]``.
+        Else, ``other`` is an iterable of ``(key, value)`` iterables.
+
+        Keys that don't match a metadata field or that have an empty value are
+        dropped.
+        """
+        def _set(key, value):
+            if key in _ATTR2FIELD and value:
+                self.set(self._convert_name(key), value)
+
+        if not other:
+            # other is None or empty container
+            pass
+        elif hasattr(other, 'keys'):
+            for k in other.keys():
+                _set(k, other[k])
+        else:
+            for k, v in other:
+                _set(k, v)
+
+        if kwargs:
+            for k, v in kwargs.items():
+                _set(k, v)
+
+    def set(self, name, value):
+        """Control then set a metadata field."""
+        name = self._convert_name(name)
+
+        if ((name in _ELEMENTSFIELD or name == 'Platform') and
+            not isinstance(value, (list, tuple))):
+            if isinstance(value, string_types):
+                value = [v.strip() for v in value.split(',')]
+            else:
+                value = []
+        elif (name in _LISTFIELDS and
+              not isinstance(value, (list, tuple))):
+            if isinstance(value, string_types):
+                value = [value]
+            else:
+                value = []
+
+        if logger.isEnabledFor(logging.WARNING):
+            project_name = self['Name']
+
+            scheme = get_scheme(self.scheme)
+            if name in _PREDICATE_FIELDS and value is not None:
+                for v in value:
+                    # check that the values are valid
+                    if not scheme.is_valid_matcher(v.split(';')[0]):
+                        logger.warning(
+                            "'%s': '%s' is not valid (field '%s')",
+                            project_name, v, name)
+            # FIXME this rejects UNKNOWN, is that right?
+            elif name in _VERSIONS_FIELDS and value is not None:
+                if not scheme.is_valid_constraint_list(value):
+                    logger.warning("'%s': '%s' is not a valid version (field '%s')",
+                                   project_name, value, name)
+            elif name in _VERSION_FIELDS and value is not None:
+                if not scheme.is_valid_version(value):
+                    logger.warning("'%s': '%s' is not a valid version (field '%s')",
+                                   project_name, value, name)
+
+        if name in _UNICODEFIELDS:
+            if name == 'Description':
+                value = self._remove_line_prefix(value)
+
+        self._fields[name] = value
+
+    def get(self, name, default=_MISSING):
+        """Get a metadata field."""
+        name = self._convert_name(name)
+        if name not in self._fields:
+            if default is _MISSING:
+                default = self._default_value(name)
+            return default
+        if name in _UNICODEFIELDS:
+            value = self._fields[name]
+            return value
+        elif name in _LISTFIELDS:
+            value = self._fields[name]
+            if value is None:
+                return []
+            res = []
+            for val in value:
+                if name not in _LISTTUPLEFIELDS:
+                    res.append(val)
+                else:
+                    # That's for Project-URL
+                    res.append((val[0], val[1]))
+            return res
+
+        elif name in _ELEMENTSFIELD:
+            value = self._fields[name]
+            if isinstance(value, string_types):
+                return value.split(',')
+        return self._fields[name]
+
+    def check(self, strict=False):
+        """Check if the metadata is compliant. If strict is True then raise if
+        no Name or Version are provided"""
+        self.set_metadata_version()
+
+        # XXX should check the versions (if the file was loaded)
+        missing, warnings = [], []
+
+        for attr in ('Name', 'Version'):  # required by PEP 345
+            if attr not in self:
+                missing.append(attr)
+
+        if strict and missing != []:
+            msg = 'missing required metadata: %s' % ', '.join(missing)
+            raise MetadataMissingError(msg)
+
+        for attr in ('Home-page', 'Author'):
+            if attr not in self:
+                missing.append(attr)
+
+        # checking metadata 1.2 (XXX needs to check 1.1, 1.0)
+        if self['Metadata-Version'] != '1.2':
+            return missing, warnings
+
+        scheme = get_scheme(self.scheme)
+
+        def are_valid_constraints(value):
+            for v in value:
+                if not scheme.is_valid_matcher(v.split(';')[0]):
+                    return False
+            return True
+
+        for fields, controller in ((_PREDICATE_FIELDS, are_valid_constraints),
+                                   (_VERSIONS_FIELDS,
+                                    scheme.is_valid_constraint_list),
+                                   (_VERSION_FIELDS,
+                                    scheme.is_valid_version)):
+            for field in fields:
+                value = self.get(field, None)
+                if value is not None and not controller(value):
+                    warnings.append("Wrong value for '%s': %s" % (field, value))
+
+        return missing, warnings
+
+    def todict(self, skip_missing=False):
+        """Return fields as a dict.
+
+        Field names will be converted to use the underscore-lowercase style
+        instead of hyphen-mixed case (i.e. home_page instead of Home-page).
+        This is as per https://www.python.org/dev/peps/pep-0566/#id17.
+        """
+        self.set_metadata_version()
+
+        fields = _version2fieldlist(self['Metadata-Version'])
+
+        data = {}
+
+        for field_name in fields:
+            if not skip_missing or field_name in self._fields:
+                key = _FIELD2ATTR[field_name]
+                if key != 'project_url':
+                    data[key] = self[field_name]
+                else:
+                    data[key] = [','.join(u) for u in self[field_name]]
+
+        return data
+
+    def add_requirements(self, requirements):
+        if self['Metadata-Version'] == '1.1':
+            # we can't have 1.1 metadata *and* Setuptools requires
+            for field in ('Obsoletes', 'Requires', 'Provides'):
+                if field in self:
+                    del self[field]
+        self['Requires-Dist'] += requirements
+
+    # Mapping API
+    # TODO could add iter* variants
+
+    def keys(self):
+        return list(_version2fieldlist(self['Metadata-Version']))
+
+    def __iter__(self):
+        for key in self.keys():
+            yield key
+
+    def values(self):
+        return [self[key] for key in self.keys()]
+
+    def items(self):
+        return [(key, self[key]) for key in self.keys()]
+
+    def __repr__(self):
+        return '<%s %s %s>' % (self.__class__.__name__, self.name,
+                               self.version)
+
+
+METADATA_FILENAME = 'pydist.json'
+WHEEL_METADATA_FILENAME = 'metadata.json'
+LEGACY_METADATA_FILENAME = 'METADATA'
+
+
+class Metadata(object):
+    """
+    The metadata of a release. This implementation uses 2.0 (JSON)
+    metadata where possible. If not possible, it wraps a LegacyMetadata
+    instance which handles the key-value metadata format.
+    """
+
+    METADATA_VERSION_MATCHER = re.compile(r'^\d+(\.\d+)*$')
+
+    NAME_MATCHER = re.compile('^[0-9A-Z]([0-9A-Z_.-]*[0-9A-Z])?$', re.I)
+
+    VERSION_MATCHER = PEP440_VERSION_RE
+
+    SUMMARY_MATCHER = re.compile('.{1,2047}')
+
+    METADATA_VERSION = '2.0'
+
+    GENERATOR = 'distlib (%s)' % __version__
+
+    MANDATORY_KEYS = {
+        'name': (),
+        'version': (),
+        'summary': ('legacy',),
+    }
+
+    INDEX_KEYS = ('name version license summary description author '
+                  'author_email keywords platform home_page classifiers '
+                  'download_url')
+
+    DEPENDENCY_KEYS = ('extras run_requires test_requires build_requires '
+                       'dev_requires provides meta_requires obsoleted_by '
+                       'supports_environments')
+
+    SYNTAX_VALIDATORS = {
+        'metadata_version': (METADATA_VERSION_MATCHER, ()),
+        'name': (NAME_MATCHER, ('legacy',)),
+        'version': (VERSION_MATCHER, ('legacy',)),
+        'summary': (SUMMARY_MATCHER, ('legacy',)),
+    }
+
+    __slots__ = ('_legacy', '_data', 'scheme')
+
+    def __init__(self, path=None, fileobj=None, mapping=None,
+                 scheme='default'):
+        if [path, fileobj, mapping].count(None) < 2:
+            raise TypeError('path, fileobj and mapping are exclusive')
+        self._legacy = None
+        self._data = None
+        self.scheme = scheme
+        #import pdb; pdb.set_trace()
+        if mapping is not None:
+            try:
+                self._validate_mapping(mapping, scheme)
+                self._data = mapping
+            except MetadataUnrecognizedVersionError:
+                self._legacy = LegacyMetadata(mapping=mapping, scheme=scheme)
+                self.validate()
+        else:
+            data = None
+            if path:
+                with open(path, 'rb') as f:
+                    data = f.read()
+            elif fileobj:
+                data = fileobj.read()
+            if data is None:
+                # Initialised with no args - to be added
+                self._data = {
+                    'metadata_version': self.METADATA_VERSION,
+                    'generator': self.GENERATOR,
+                }
+            else:
+                if not isinstance(data, text_type):
+                    data = data.decode('utf-8')
+                try:
+                    self._data = json.loads(data)
+                    self._validate_mapping(self._data, scheme)
+                except ValueError:
+                    # Note: MetadataUnrecognizedVersionError does not
+                    # inherit from ValueError (it's a DistlibException,
+                    # which should not inherit from ValueError).
+                    # The ValueError comes from the json.load - if that
+                    # succeeds and we get a validation error, we want
+                    # that to propagate
+                    self._legacy = LegacyMetadata(fileobj=StringIO(data),
+                                                  scheme=scheme)
+                    self.validate()
+
+    common_keys = set(('name', 'version', 'license', 'keywords', 'summary'))
+
+    none_list = (None, list)
+    none_dict = (None, dict)
+
+    mapped_keys = {
+        'run_requires': ('Requires-Dist', list),
+        'build_requires': ('Setup-Requires-Dist', list),
+        'dev_requires': none_list,
+        'test_requires': none_list,
+        'meta_requires': none_list,
+        'extras': ('Provides-Extra', list),
+        'modules': none_list,
+        'namespaces': none_list,
+        'exports': none_dict,
+        'commands': none_dict,
+        'classifiers': ('Classifier', list),
+        'source_url': ('Download-URL', None),
+        'metadata_version': ('Metadata-Version', None),
+    }
+
+    del none_list, none_dict
+
+    def __getattribute__(self, key):
+        common = object.__getattribute__(self, 'common_keys')
+        mapped = object.__getattribute__(self, 'mapped_keys')
+        if key in mapped:
+            lk, maker = mapped[key]
+            if self._legacy:
+                if lk is None:
+                    result = None if maker is None else maker()
+                else:
+                    result = self._legacy.get(lk)
+            else:
+                value = None if maker is None else maker()
+                if key not in ('commands', 'exports', 'modules', 'namespaces',
+                               'classifiers'):
+                    result = self._data.get(key, value)
+                else:
+                    # special cases for PEP 459
+                    sentinel = object()
+                    result = sentinel
+                    d = self._data.get('extensions')
+                    if d:
+                        if key == 'commands':
+                            result = d.get('python.commands', value)
+                        elif key == 'classifiers':
+                            d = d.get('python.details')
+                            if d:
+                                result = d.get(key, value)
+                        else:
+                            d = d.get('python.exports')
+                            if not d:
+                                d = self._data.get('python.exports')
+                            if d:
+                                result = d.get(key, value)
+                    if result is sentinel:
+                        result = value
+        elif key not in common:
+            result = object.__getattribute__(self, key)
+        elif self._legacy:
+            result = self._legacy.get(key)
+        else:
+            result = self._data.get(key)
+        return result
+
+    def _validate_value(self, key, value, scheme=None):
+        if key in self.SYNTAX_VALIDATORS:
+            pattern, exclusions = self.SYNTAX_VALIDATORS[key]
+            if (scheme or self.scheme) not in exclusions:
+                m = pattern.match(value)
+                if not m:
+                    raise MetadataInvalidError("'%s' is an invalid value for "
+                                               "the '%s' property" % (value,
+                                                                    key))
+
+    def __setattr__(self, key, value):
+        self._validate_value(key, value)
+        common = object.__getattribute__(self, 'common_keys')
+        mapped = object.__getattribute__(self, 'mapped_keys')
+        if key in mapped:
+            lk, _ = mapped[key]
+            if self._legacy:
+                if lk is None:
+                    raise NotImplementedError
+                self._legacy[lk] = value
+            elif key not in ('commands', 'exports', 'modules', 'namespaces',
+                             'classifiers'):
+                self._data[key] = value
+            else:
+                # special cases for PEP 459
+                d = self._data.setdefault('extensions', {})
+                if key == 'commands':
+                    d['python.commands'] = value
+                elif key == 'classifiers':
+                    d = d.setdefault('python.details', {})
+                    d[key] = value
+                else:
+                    d = d.setdefault('python.exports', {})
+                    d[key] = value
+        elif key not in common:
+            object.__setattr__(self, key, value)
+        else:
+            if key == 'keywords':
+                if isinstance(value, string_types):
+                    value = value.strip()
+                    if value:
+                        value = value.split()
+                    else:
+                        value = []
+            if self._legacy:
+                self._legacy[key] = value
+            else:
+                self._data[key] = value
+
+    @property
+    def name_and_version(self):
+        return _get_name_and_version(self.name, self.version, True)
+
+    @property
+    def provides(self):
+        if self._legacy:
+            result = self._legacy['Provides-Dist']
+        else:
+            result = self._data.setdefault('provides', [])
+        s = '%s (%s)' % (self.name, self.version)
+        if s not in result:
+            result.append(s)
+        return result
+
+    @provides.setter
+    def provides(self, value):
+        if self._legacy:
+            self._legacy['Provides-Dist'] = value
+        else:
+            self._data['provides'] = value
+
+    def get_requirements(self, reqts, extras=None, env=None):
+        """
+        Base method to get dependencies, given a set of extras
+        to satisfy and an optional environment context.
+        :param reqts: A list of sometimes-wanted dependencies,
+                      perhaps dependent on extras and environment.
+        :param extras: A list of optional components being requested.
+        :param env: An optional environment for marker evaluation.
+        """
+        if self._legacy:
+            result = reqts
+        else:
+            result = []
+            extras = get_extras(extras or [], self.extras)
+            for d in reqts:
+                if 'extra' not in d and 'environment' not in d:
+                    # unconditional
+                    include = True
+                else:
+                    if 'extra' not in d:
+                        # Not extra-dependent - only environment-dependent
+                        include = True
+                    else:
+                        include = d.get('extra') in extras
+                    if include:
+                        # Not excluded because of extras, check environment
+                        marker = d.get('environment')
+                        if marker:
+                            include = interpret(marker, env)
+                if include:
+                    result.extend(d['requires'])
+            for key in ('build', 'dev', 'test'):
+                e = ':%s:' % key
+                if e in extras:
+                    extras.remove(e)
+                    # A recursive call, but it should terminate since 'test'
+                    # has been removed from the extras
+                    reqts = self._data.get('%s_requires' % key, [])
+                    result.extend(self.get_requirements(reqts, extras=extras,
+                                                        env=env))
+        return result
+
+    @property
+    def dictionary(self):
+        if self._legacy:
+            return self._from_legacy()
+        return self._data
+
+    @property
+    def dependencies(self):
+        if self._legacy:
+            raise NotImplementedError
+        else:
+            return extract_by_key(self._data, self.DEPENDENCY_KEYS)
+
+    @dependencies.setter
+    def dependencies(self, value):
+        if self._legacy:
+            raise NotImplementedError
+        else:
+            self._data.update(value)
+
+    def _validate_mapping(self, mapping, scheme):
+        if mapping.get('metadata_version') != self.METADATA_VERSION:
+            raise MetadataUnrecognizedVersionError()
+        missing = []
+        for key, exclusions in self.MANDATORY_KEYS.items():
+            if key not in mapping:
+                if scheme not in exclusions:
+                    missing.append(key)
+        if missing:
+            msg = 'Missing metadata items: %s' % ', '.join(missing)
+            raise MetadataMissingError(msg)
+        for k, v in mapping.items():
+            self._validate_value(k, v, scheme)
+
+    def validate(self):
+        if self._legacy:
+            missing, warnings = self._legacy.check(True)
+            if missing or warnings:
+                logger.warning('Metadata: missing: %s, warnings: %s',
+                               missing, warnings)
+        else:
+            self._validate_mapping(self._data, self.scheme)
+
+    def todict(self):
+        if self._legacy:
+            return self._legacy.todict(True)
+        else:
+            result = extract_by_key(self._data, self.INDEX_KEYS)
+            return result
+
+    def _from_legacy(self):
+        assert self._legacy and not self._data
+        result = {
+            'metadata_version': self.METADATA_VERSION,
+            'generator': self.GENERATOR,
+        }
+        lmd = self._legacy.todict(True)     # skip missing ones
+        for k in ('name', 'version', 'license', 'summary', 'description',
+                  'classifier'):
+            if k in lmd:
+                if k == 'classifier':
+                    nk = 'classifiers'
+                else:
+                    nk = k
+                result[nk] = lmd[k]
+        kw = lmd.get('Keywords', [])
+        if kw == ['']:
+            kw = []
+        result['keywords'] = kw
+        keys = (('requires_dist', 'run_requires'),
+                ('setup_requires_dist', 'build_requires'))
+        for ok, nk in keys:
+            if ok in lmd and lmd[ok]:
+                result[nk] = [{'requires': lmd[ok]}]
+        result['provides'] = self.provides
+        author = {}
+        maintainer = {}
+        return result
+
+    LEGACY_MAPPING = {
+        'name': 'Name',
+        'version': 'Version',
+        ('extensions', 'python.details', 'license'): 'License',
+        'summary': 'Summary',
+        'description': 'Description',
+        ('extensions', 'python.project', 'project_urls', 'Home'): 'Home-page',
+        ('extensions', 'python.project', 'contacts', 0, 'name'): 'Author',
+        ('extensions', 'python.project', 'contacts', 0, 'email'): 'Author-email',
+        'source_url': 'Download-URL',
+        ('extensions', 'python.details', 'classifiers'): 'Classifier',
+    }
+
+    def _to_legacy(self):
+        def process_entries(entries):
+            reqts = set()
+            for e in entries:
+                extra = e.get('extra')
+                env = e.get('environment')
+                rlist = e['requires']
+                for r in rlist:
+                    if not env and not extra:
+                        reqts.add(r)
+                    else:
+                        marker = ''
+                        if extra:
+                            marker = 'extra == "%s"' % extra
+                        if env:
+                            if marker:
+                                marker = '(%s) and %s' % (env, marker)
+                            else:
+                                marker = env
+                        reqts.add(';'.join((r, marker)))
+            return reqts
+
+        assert self._data and not self._legacy
+        result = LegacyMetadata()
+        nmd = self._data
+        # import pdb; pdb.set_trace()
+        for nk, ok in self.LEGACY_MAPPING.items():
+            if not isinstance(nk, tuple):
+                if nk in nmd:
+                    result[ok] = nmd[nk]
+            else:
+                d = nmd
+                found = True
+                for k in nk:
+                    try:
+                        d = d[k]
+                    except (KeyError, IndexError):
+                        found = False
+                        break
+                if found:
+                    result[ok] = d
+        r1 = process_entries(self.run_requires + self.meta_requires)
+        r2 = process_entries(self.build_requires + self.dev_requires)
+        if self.extras:
+            result['Provides-Extra'] = sorted(self.extras)
+        result['Requires-Dist'] = sorted(r1)
+        result['Setup-Requires-Dist'] = sorted(r2)
+        # TODO: any other fields wanted
+        return result
+
+    def write(self, path=None, fileobj=None, legacy=False, skip_unknown=True):
+        if [path, fileobj].count(None) != 1:
+            raise ValueError('Exactly one of path and fileobj is needed')
+        self.validate()
+        if legacy:
+            if self._legacy:
+                legacy_md = self._legacy
+            else:
+                legacy_md = self._to_legacy()
+            if path:
+                legacy_md.write(path, skip_unknown=skip_unknown)
+            else:
+                legacy_md.write_file(fileobj, skip_unknown=skip_unknown)
+        else:
+            if self._legacy:
+                d = self._from_legacy()
+            else:
+                d = self._data
+            if fileobj:
+                json.dump(d, fileobj, ensure_ascii=True, indent=2,
+                          sort_keys=True)
+            else:
+                with codecs.open(path, 'w', 'utf-8') as f:
+                    json.dump(d, f, ensure_ascii=True, indent=2,
+                              sort_keys=True)
+
+    def add_requirements(self, requirements):
+        if self._legacy:
+            self._legacy.add_requirements(requirements)
+        else:
+            run_requires = self._data.setdefault('run_requires', [])
+            always = None
+            for entry in run_requires:
+                if 'environment' not in entry and 'extra' not in entry:
+                    always = entry
+                    break
+            if always is None:
+                always = { 'requires': requirements }
+                run_requires.insert(0, always)
+            else:
+                rset = set(always['requires']) | set(requirements)
+                always['requires'] = sorted(rset)
+
+    def __repr__(self):
+        name = self.name or '(no name)'
+        version = self.version or 'no version'
+        return '<%s %s %s (%s)>' % (self.__class__.__name__,
+                                    self.metadata_version, name, version)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/resources.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/resources.py
new file mode 100644
index 0000000..1884016
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/resources.py
@@ -0,0 +1,355 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from __future__ import unicode_literals
+
+import bisect
+import io
+import logging
+import os
+import pkgutil
+import shutil
+import sys
+import types
+import zipimport
+
+from . import DistlibException
+from .util import cached_property, get_cache_base, path_to_cache_dir, Cache
+
+logger = logging.getLogger(__name__)
+
+
+cache = None    # created when needed
+
+
+class ResourceCache(Cache):
+    def __init__(self, base=None):
+        if base is None:
+            # Use native string to avoid issues on 2.x: see Python #20140.
+            base = os.path.join(get_cache_base(), str('resource-cache'))
+        super(ResourceCache, self).__init__(base)
+
+    def is_stale(self, resource, path):
+        """
+        Is the cache stale for the given resource?
+
+        :param resource: The :class:`Resource` being cached.
+        :param path: The path of the resource in the cache.
+        :return: True if the cache is stale.
+        """
+        # Cache invalidation is a hard problem :-)
+        return True
+
+    def get(self, resource):
+        """
+        Get a resource into the cache,
+
+        :param resource: A :class:`Resource` instance.
+        :return: The pathname of the resource in the cache.
+        """
+        prefix, path = resource.finder.get_cache_info(resource)
+        if prefix is None:
+            result = path
+        else:
+            result = os.path.join(self.base, self.prefix_to_dir(prefix), path)
+            dirname = os.path.dirname(result)
+            if not os.path.isdir(dirname):
+                os.makedirs(dirname)
+            if not os.path.exists(result):
+                stale = True
+            else:
+                stale = self.is_stale(resource, path)
+            if stale:
+                # write the bytes of the resource to the cache location
+                with open(result, 'wb') as f:
+                    f.write(resource.bytes)
+        return result
+
+
+class ResourceBase(object):
+    def __init__(self, finder, name):
+        self.finder = finder
+        self.name = name
+
+
+class Resource(ResourceBase):
+    """
+    A class representing an in-package resource, such as a data file. This is
+    not normally instantiated by user code, but rather by a
+    :class:`ResourceFinder` which manages the resource.
+    """
+    is_container = False        # Backwards compatibility
+
+    def as_stream(self):
+        """
+        Get the resource as a stream.
+
+        This is not a property to make it obvious that it returns a new stream
+        each time.
+        """
+        return self.finder.get_stream(self)
+
+    @cached_property
+    def file_path(self):
+        global cache
+        if cache is None:
+            cache = ResourceCache()
+        return cache.get(self)
+
+    @cached_property
+    def bytes(self):
+        return self.finder.get_bytes(self)
+
+    @cached_property
+    def size(self):
+        return self.finder.get_size(self)
+
+
+class ResourceContainer(ResourceBase):
+    is_container = True     # Backwards compatibility
+
+    @cached_property
+    def resources(self):
+        return self.finder.get_resources(self)
+
+
+class ResourceFinder(object):
+    """
+    Resource finder for file system resources.
+    """
+
+    if sys.platform.startswith('java'):
+        skipped_extensions = ('.pyc', '.pyo', '.class')
+    else:
+        skipped_extensions = ('.pyc', '.pyo')
+
+    def __init__(self, module):
+        self.module = module
+        self.loader = getattr(module, '__loader__', None)
+        self.base = os.path.dirname(getattr(module, '__file__', ''))
+
+    def _adjust_path(self, path):
+        return os.path.realpath(path)
+
+    def _make_path(self, resource_name):
+        # Issue #50: need to preserve type of path on Python 2.x
+        # like os.path._get_sep
+        if isinstance(resource_name, bytes):    # should only happen on 2.x
+            sep = b'/'
+        else:
+            sep = '/'
+        parts = resource_name.split(sep)
+        parts.insert(0, self.base)
+        result = os.path.join(*parts)
+        return self._adjust_path(result)
+
+    def _find(self, path):
+        return os.path.exists(path)
+
+    def get_cache_info(self, resource):
+        return None, resource.path
+
+    def find(self, resource_name):
+        path = self._make_path(resource_name)
+        if not self._find(path):
+            result = None
+        else:
+            if self._is_directory(path):
+                result = ResourceContainer(self, resource_name)
+            else:
+                result = Resource(self, resource_name)
+            result.path = path
+        return result
+
+    def get_stream(self, resource):
+        return open(resource.path, 'rb')
+
+    def get_bytes(self, resource):
+        with open(resource.path, 'rb') as f:
+            return f.read()
+
+    def get_size(self, resource):
+        return os.path.getsize(resource.path)
+
+    def get_resources(self, resource):
+        def allowed(f):
+            return (f != '__pycache__' and not
+                    f.endswith(self.skipped_extensions))
+        return set([f for f in os.listdir(resource.path) if allowed(f)])
+
+    def is_container(self, resource):
+        return self._is_directory(resource.path)
+
+    _is_directory = staticmethod(os.path.isdir)
+
+    def iterator(self, resource_name):
+        resource = self.find(resource_name)
+        if resource is not None:
+            todo = [resource]
+            while todo:
+                resource = todo.pop(0)
+                yield resource
+                if resource.is_container:
+                    rname = resource.name
+                    for name in resource.resources:
+                        if not rname:
+                            new_name = name
+                        else:
+                            new_name = '/'.join([rname, name])
+                        child = self.find(new_name)
+                        if child.is_container:
+                            todo.append(child)
+                        else:
+                            yield child
+
+
+class ZipResourceFinder(ResourceFinder):
+    """
+    Resource finder for resources in .zip files.
+    """
+    def __init__(self, module):
+        super(ZipResourceFinder, self).__init__(module)
+        archive = self.loader.archive
+        self.prefix_len = 1 + len(archive)
+        # PyPy doesn't have a _files attr on zipimporter, and you can't set one
+        if hasattr(self.loader, '_files'):
+            self._files = self.loader._files
+        else:
+            self._files = zipimport._zip_directory_cache[archive]
+        self.index = sorted(self._files)
+
+    def _adjust_path(self, path):
+        return path
+
+    def _find(self, path):
+        path = path[self.prefix_len:]
+        if path in self._files:
+            result = True
+        else:
+            if path and path[-1] != os.sep:
+                path = path + os.sep
+            i = bisect.bisect(self.index, path)
+            try:
+                result = self.index[i].startswith(path)
+            except IndexError:
+                result = False
+        if not result:
+            logger.debug('_find failed: %r %r', path, self.loader.prefix)
+        else:
+            logger.debug('_find worked: %r %r', path, self.loader.prefix)
+        return result
+
+    def get_cache_info(self, resource):
+        prefix = self.loader.archive
+        path = resource.path[1 + len(prefix):]
+        return prefix, path
+
+    def get_bytes(self, resource):
+        return self.loader.get_data(resource.path)
+
+    def get_stream(self, resource):
+        return io.BytesIO(self.get_bytes(resource))
+
+    def get_size(self, resource):
+        path = resource.path[self.prefix_len:]
+        return self._files[path][3]
+
+    def get_resources(self, resource):
+        path = resource.path[self.prefix_len:]
+        if path and path[-1] != os.sep:
+            path += os.sep
+        plen = len(path)
+        result = set()
+        i = bisect.bisect(self.index, path)
+        while i < len(self.index):
+            if not self.index[i].startswith(path):
+                break
+            s = self.index[i][plen:]
+            result.add(s.split(os.sep, 1)[0])   # only immediate children
+            i += 1
+        return result
+
+    def _is_directory(self, path):
+        path = path[self.prefix_len:]
+        if path and path[-1] != os.sep:
+            path += os.sep
+        i = bisect.bisect(self.index, path)
+        try:
+            result = self.index[i].startswith(path)
+        except IndexError:
+            result = False
+        return result
+
+_finder_registry = {
+    type(None): ResourceFinder,
+    zipimport.zipimporter: ZipResourceFinder
+}
+
+try:
+    # In Python 3.6, _frozen_importlib -> _frozen_importlib_external
+    try:
+        import _frozen_importlib_external as _fi
+    except ImportError:
+        import _frozen_importlib as _fi
+    _finder_registry[_fi.SourceFileLoader] = ResourceFinder
+    _finder_registry[_fi.FileFinder] = ResourceFinder
+    del _fi
+except (ImportError, AttributeError):
+    pass
+
+
+def register_finder(loader, finder_maker):
+    _finder_registry[type(loader)] = finder_maker
+
+_finder_cache = {}
+
+
+def finder(package):
+    """
+    Return a resource finder for a package.
+    :param package: The name of the package.
+    :return: A :class:`ResourceFinder` instance for the package.
+    """
+    if package in _finder_cache:
+        result = _finder_cache[package]
+    else:
+        if package not in sys.modules:
+            __import__(package)
+        module = sys.modules[package]
+        path = getattr(module, '__path__', None)
+        if path is None:
+            raise DistlibException('You cannot get a finder for a module, '
+                                   'only for a package')
+        loader = getattr(module, '__loader__', None)
+        finder_maker = _finder_registry.get(type(loader))
+        if finder_maker is None:
+            raise DistlibException('Unable to locate finder for %r' % package)
+        result = finder_maker(module)
+        _finder_cache[package] = result
+    return result
+
+
+_dummy_module = types.ModuleType(str('__dummy__'))
+
+
+def finder_for_path(path):
+    """
+    Return a resource finder for a path, which should represent a container.
+
+    :param path: The path.
+    :return: A :class:`ResourceFinder` instance for the path.
+    """
+    result = None
+    # calls any path hooks, gets importer into cache
+    pkgutil.get_importer(path)
+    loader = sys.path_importer_cache.get(path)
+    finder = _finder_registry.get(type(loader))
+    if finder:
+        module = _dummy_module
+        module.__file__ = os.path.join(path, '')
+        module.__loader__ = loader
+        result = finder(module)
+    return result
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/scripts.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/scripts.py
new file mode 100644
index 0000000..03f8f21
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/scripts.py
@@ -0,0 +1,419 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2015 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from io import BytesIO
+import logging
+import os
+import re
+import struct
+import sys
+
+from .compat import sysconfig, detect_encoding, ZipFile
+from .resources import finder
+from .util import (FileOperator, get_export_entry, convert_path,
+                   get_executable, in_venv)
+
+logger = logging.getLogger(__name__)
+
+_DEFAULT_MANIFEST = '''
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+ <assemblyIdentity version="1.0.0.0"
+ processorArchitecture="X86"
+ name="%s"
+ type="win32"/>
+
+ <!-- Identify the application security requirements. -->
+ <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+ <security>
+ <requestedPrivileges>
+ <requestedExecutionLevel level="asInvoker" uiAccess="false"/>
+ </requestedPrivileges>
+ </security>
+ </trustInfo>
+</assembly>'''.strip()
+
+# check if Python is called on the first line with this expression
+FIRST_LINE_RE = re.compile(b'^#!.*pythonw?[0-9.]*([ \t].*)?$')
+SCRIPT_TEMPLATE = r'''# -*- coding: utf-8 -*-
+import re
+import sys
+from %(module)s import %(import_name)s
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(%(func)s())
+'''
+
+
+def enquote_executable(executable):
+    if ' ' in executable:
+        # make sure we quote only the executable in case of env
+        # for example /usr/bin/env "/dir with spaces/bin/jython"
+        # instead of "/usr/bin/env /dir with spaces/bin/jython"
+        # otherwise whole
+        if executable.startswith('/usr/bin/env '):
+            env, _executable = executable.split(' ', 1)
+            if ' ' in _executable and not _executable.startswith('"'):
+                executable = '%s "%s"' % (env, _executable)
+        else:
+            if not executable.startswith('"'):
+                executable = '"%s"' % executable
+    return executable
+
+# Keep the old name around (for now), as there is at least one project using it!
+_enquote_executable = enquote_executable
+
+class ScriptMaker(object):
+    """
+    A class to copy or create scripts from source scripts or callable
+    specifications.
+    """
+    script_template = SCRIPT_TEMPLATE
+
+    executable = None  # for shebangs
+
+    def __init__(self, source_dir, target_dir, add_launchers=True,
+                 dry_run=False, fileop=None):
+        self.source_dir = source_dir
+        self.target_dir = target_dir
+        self.add_launchers = add_launchers
+        self.force = False
+        self.clobber = False
+        # It only makes sense to set mode bits on POSIX.
+        self.set_mode = (os.name == 'posix') or (os.name == 'java' and
+                                                 os._name == 'posix')
+        self.variants = set(('', 'X.Y'))
+        self._fileop = fileop or FileOperator(dry_run)
+
+        self._is_nt = os.name == 'nt' or (
+            os.name == 'java' and os._name == 'nt')
+        self.version_info = sys.version_info
+
+    def _get_alternate_executable(self, executable, options):
+        if options.get('gui', False) and self._is_nt:  # pragma: no cover
+            dn, fn = os.path.split(executable)
+            fn = fn.replace('python', 'pythonw')
+            executable = os.path.join(dn, fn)
+        return executable
+
+    if sys.platform.startswith('java'):  # pragma: no cover
+        def _is_shell(self, executable):
+            """
+            Determine if the specified executable is a script
+            (contains a #! line)
+            """
+            try:
+                with open(executable) as fp:
+                    return fp.read(2) == '#!'
+            except (OSError, IOError):
+                logger.warning('Failed to open %s', executable)
+                return False
+
+        def _fix_jython_executable(self, executable):
+            if self._is_shell(executable):
+                # Workaround for Jython is not needed on Linux systems.
+                import java
+
+                if java.lang.System.getProperty('os.name') == 'Linux':
+                    return executable
+            elif executable.lower().endswith('jython.exe'):
+                # Use wrapper exe for Jython on Windows
+                return executable
+            return '/usr/bin/env %s' % executable
+
+    def _build_shebang(self, executable, post_interp):
+        """
+        Build a shebang line. In the simple case (on Windows, or a shebang line
+        which is not too long or contains spaces) use a simple formulation for
+        the shebang. Otherwise, use /bin/sh as the executable, with a contrived
+        shebang which allows the script to run either under Python or sh, using
+        suitable quoting. Thanks to Harald Nordgren for his input.
+
+        See also: http://www.in-ulm.de/~mascheck/various/shebang/#length
+                  https://hg.mozilla.org/mozilla-central/file/tip/mach
+        """
+        if os.name != 'posix':
+            simple_shebang = True
+        else:
+            # Add 3 for '#!' prefix and newline suffix.
+            shebang_length = len(executable) + len(post_interp) + 3
+            if sys.platform == 'darwin':
+                max_shebang_length = 512
+            else:
+                max_shebang_length = 127
+            simple_shebang = ((b' ' not in executable) and
+                              (shebang_length <= max_shebang_length))
+
+        if simple_shebang:
+            result = b'#!' + executable + post_interp + b'\n'
+        else:
+            result = b'#!/bin/sh\n'
+            result += b"'''exec' " + executable + post_interp + b' "$0" "$@"\n'
+            result += b"' '''"
+        return result
+
+    def _get_shebang(self, encoding, post_interp=b'', options=None):
+        enquote = True
+        if self.executable:
+            executable = self.executable
+            enquote = False     # assume this will be taken care of
+        elif not sysconfig.is_python_build():
+            executable = get_executable()
+        elif in_venv():  # pragma: no cover
+            executable = os.path.join(sysconfig.get_path('scripts'),
+                            'python%s' % sysconfig.get_config_var('EXE'))
+        else:  # pragma: no cover
+            executable = os.path.join(
+                sysconfig.get_config_var('BINDIR'),
+               'python%s%s' % (sysconfig.get_config_var('VERSION'),
+                               sysconfig.get_config_var('EXE')))
+        if options:
+            executable = self._get_alternate_executable(executable, options)
+
+        if sys.platform.startswith('java'):  # pragma: no cover
+            executable = self._fix_jython_executable(executable)
+
+        # Normalise case for Windows - COMMENTED OUT
+        # executable = os.path.normcase(executable)
+        # N.B. The normalising operation above has been commented out: See
+        # issue #124. Although paths in Windows are generally case-insensitive,
+        # they aren't always. For example, a path containing a ẞ (which is a
+        # LATIN CAPITAL LETTER SHARP S - U+1E9E) is normcased to ß (which is a
+        # LATIN SMALL LETTER SHARP S' - U+00DF). The two are not considered by
+        # Windows as equivalent in path names.
+
+        # If the user didn't specify an executable, it may be necessary to
+        # cater for executable paths with spaces (not uncommon on Windows)
+        if enquote:
+            executable = enquote_executable(executable)
+        # Issue #51: don't use fsencode, since we later try to
+        # check that the shebang is decodable using utf-8.
+        executable = executable.encode('utf-8')
+        # in case of IronPython, play safe and enable frames support
+        if (sys.platform == 'cli' and '-X:Frames' not in post_interp
+            and '-X:FullFrames' not in post_interp):  # pragma: no cover
+            post_interp += b' -X:Frames'
+        shebang = self._build_shebang(executable, post_interp)
+        # Python parser starts to read a script using UTF-8 until
+        # it gets a #coding:xxx cookie. The shebang has to be the
+        # first line of a file, the #coding:xxx cookie cannot be
+        # written before. So the shebang has to be decodable from
+        # UTF-8.
+        try:
+            shebang.decode('utf-8')
+        except UnicodeDecodeError:  # pragma: no cover
+            raise ValueError(
+                'The shebang (%r) is not decodable from utf-8' % shebang)
+        # If the script is encoded to a custom encoding (use a
+        # #coding:xxx cookie), the shebang has to be decodable from
+        # the script encoding too.
+        if encoding != 'utf-8':
+            try:
+                shebang.decode(encoding)
+            except UnicodeDecodeError:  # pragma: no cover
+                raise ValueError(
+                    'The shebang (%r) is not decodable '
+                    'from the script encoding (%r)' % (shebang, encoding))
+        return shebang
+
+    def _get_script_text(self, entry):
+        return self.script_template % dict(module=entry.prefix,
+                                           import_name=entry.suffix.split('.')[0],
+                                           func=entry.suffix)
+
+    manifest = _DEFAULT_MANIFEST
+
+    def get_manifest(self, exename):
+        base = os.path.basename(exename)
+        return self.manifest % base
+
+    def _write_script(self, names, shebang, script_bytes, filenames, ext):
+        use_launcher = self.add_launchers and self._is_nt
+        linesep = os.linesep.encode('utf-8')
+        if not shebang.endswith(linesep):
+            shebang += linesep
+        if not use_launcher:
+            script_bytes = shebang + script_bytes
+        else:  # pragma: no cover
+            if ext == 'py':
+                launcher = self._get_launcher('t')
+            else:
+                launcher = self._get_launcher('w')
+            stream = BytesIO()
+            with ZipFile(stream, 'w') as zf:
+                zf.writestr('__main__.py', script_bytes)
+            zip_data = stream.getvalue()
+            script_bytes = launcher + shebang + zip_data
+        for name in names:
+            outname = os.path.join(self.target_dir, name)
+            if use_launcher:  # pragma: no cover
+                n, e = os.path.splitext(outname)
+                if e.startswith('.py'):
+                    outname = n
+                outname = '%s.exe' % outname
+                try:
+                    self._fileop.write_binary_file(outname, script_bytes)
+                except Exception:
+                    # Failed writing an executable - it might be in use.
+                    logger.warning('Failed to write executable - trying to '
+                                   'use .deleteme logic')
+                    dfname = '%s.deleteme' % outname
+                    if os.path.exists(dfname):
+                        os.remove(dfname)       # Not allowed to fail here
+                    os.rename(outname, dfname)  # nor here
+                    self._fileop.write_binary_file(outname, script_bytes)
+                    logger.debug('Able to replace executable using '
+                                 '.deleteme logic')
+                    try:
+                        os.remove(dfname)
+                    except Exception:
+                        pass    # still in use - ignore error
+            else:
+                if self._is_nt and not outname.endswith('.' + ext):  # pragma: no cover
+                    outname = '%s.%s' % (outname, ext)
+                if os.path.exists(outname) and not self.clobber:
+                    logger.warning('Skipping existing file %s', outname)
+                    continue
+                self._fileop.write_binary_file(outname, script_bytes)
+                if self.set_mode:
+                    self._fileop.set_executable_mode([outname])
+            filenames.append(outname)
+
+    def _make_script(self, entry, filenames, options=None):
+        post_interp = b''
+        if options:
+            args = options.get('interpreter_args', [])
+            if args:
+                args = ' %s' % ' '.join(args)
+                post_interp = args.encode('utf-8')
+        shebang = self._get_shebang('utf-8', post_interp, options=options)
+        script = self._get_script_text(entry).encode('utf-8')
+        name = entry.name
+        scriptnames = set()
+        if '' in self.variants:
+            scriptnames.add(name)
+        if 'X' in self.variants:
+            scriptnames.add('%s%s' % (name, self.version_info[0]))
+        if 'X.Y' in self.variants:
+            scriptnames.add('%s-%s.%s' % (name, self.version_info[0],
+                                          self.version_info[1]))
+        if options and options.get('gui', False):
+            ext = 'pyw'
+        else:
+            ext = 'py'
+        self._write_script(scriptnames, shebang, script, filenames, ext)
+
+    def _copy_script(self, script, filenames):
+        adjust = False
+        script = os.path.join(self.source_dir, convert_path(script))
+        outname = os.path.join(self.target_dir, os.path.basename(script))
+        if not self.force and not self._fileop.newer(script, outname):
+            logger.debug('not copying %s (up-to-date)', script)
+            return
+
+        # Always open the file, but ignore failures in dry-run mode --
+        # that way, we'll get accurate feedback if we can read the
+        # script.
+        try:
+            f = open(script, 'rb')
+        except IOError:  # pragma: no cover
+            if not self.dry_run:
+                raise
+            f = None
+        else:
+            first_line = f.readline()
+            if not first_line:  # pragma: no cover
+                logger.warning('%s: %s is an empty file (skipping)',
+                               self.get_command_name(),  script)
+                return
+
+            match = FIRST_LINE_RE.match(first_line.replace(b'\r\n', b'\n'))
+            if match:
+                adjust = True
+                post_interp = match.group(1) or b''
+
+        if not adjust:
+            if f:
+                f.close()
+            self._fileop.copy_file(script, outname)
+            if self.set_mode:
+                self._fileop.set_executable_mode([outname])
+            filenames.append(outname)
+        else:
+            logger.info('copying and adjusting %s -> %s', script,
+                        self.target_dir)
+            if not self._fileop.dry_run:
+                encoding, lines = detect_encoding(f.readline)
+                f.seek(0)
+                shebang = self._get_shebang(encoding, post_interp)
+                if b'pythonw' in first_line:  # pragma: no cover
+                    ext = 'pyw'
+                else:
+                    ext = 'py'
+                n = os.path.basename(outname)
+                self._write_script([n], shebang, f.read(), filenames, ext)
+            if f:
+                f.close()
+
+    @property
+    def dry_run(self):
+        return self._fileop.dry_run
+
+    @dry_run.setter
+    def dry_run(self, value):
+        self._fileop.dry_run = value
+
+    if os.name == 'nt' or (os.name == 'java' and os._name == 'nt'):  # pragma: no cover
+        # Executable launcher support.
+        # Launchers are from https://bitbucket.org/vinay.sajip/simple_launcher/
+
+        def _get_launcher(self, kind):
+            if struct.calcsize('P') == 8:   # 64-bit
+                bits = '64'
+            else:
+                bits = '32'
+            name = '%s%s.exe' % (kind, bits)
+            # Issue 31: don't hardcode an absolute package name, but
+            # determine it relative to the current package
+            distlib_package = __name__.rsplit('.', 1)[0]
+            resource = finder(distlib_package).find(name)
+            if not resource:
+                msg = ('Unable to find resource %s in package %s' % (name,
+                       distlib_package))
+                raise ValueError(msg)
+            return resource.bytes
+
+    # Public API follows
+
+    def make(self, specification, options=None):
+        """
+        Make a script.
+
+        :param specification: The specification, which is either a valid export
+                              entry specification (to make a script from a
+                              callable) or a filename (to make a script by
+                              copying from a source location).
+        :param options: A dictionary of options controlling script generation.
+        :return: A list of all absolute pathnames written to.
+        """
+        filenames = []
+        entry = get_export_entry(specification)
+        if entry is None:
+            self._copy_script(specification, filenames)
+        else:
+            self._make_script(entry, filenames, options=options)
+        return filenames
+
+    def make_multiple(self, specifications, options=None):
+        """
+        Take a list of specifications and make scripts from them,
+        :param specifications: A list of specifications.
+        :return: A list of all absolute pathnames written to,
+        """
+        filenames = []
+        for specification in specifications:
+            filenames.extend(self.make(specification, options))
+        return filenames
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/util.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/util.py
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--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/util.py
@@ -0,0 +1,1761 @@
+#
+# Copyright (C) 2012-2017 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+import codecs
+from collections import deque
+import contextlib
+import csv
+from glob import iglob as std_iglob
+import io
+import json
+import logging
+import os
+import py_compile
+import re
+import socket
+try:
+    import ssl
+except ImportError:  # pragma: no cover
+    ssl = None
+import subprocess
+import sys
+import tarfile
+import tempfile
+import textwrap
+
+try:
+    import threading
+except ImportError:  # pragma: no cover
+    import dummy_threading as threading
+import time
+
+from . import DistlibException
+from .compat import (string_types, text_type, shutil, raw_input, StringIO,
+                     cache_from_source, urlopen, urljoin, httplib, xmlrpclib,
+                     splittype, HTTPHandler, BaseConfigurator, valid_ident,
+                     Container, configparser, URLError, ZipFile, fsdecode,
+                     unquote, urlparse)
+
+logger = logging.getLogger(__name__)
+
+#
+# Requirement parsing code as per PEP 508
+#
+
+IDENTIFIER = re.compile(r'^([\w\.-]+)\s*')
+VERSION_IDENTIFIER = re.compile(r'^([\w\.*+-]+)\s*')
+COMPARE_OP = re.compile(r'^(<=?|>=?|={2,3}|[~!]=)\s*')
+MARKER_OP = re.compile(r'^((<=?)|(>=?)|={2,3}|[~!]=|in|not\s+in)\s*')
+OR = re.compile(r'^or\b\s*')
+AND = re.compile(r'^and\b\s*')
+NON_SPACE = re.compile(r'(\S+)\s*')
+STRING_CHUNK = re.compile(r'([\s\w\.{}()*+#:;,/?!~`@$%^&=|<>\[\]-]+)')
+
+
+def parse_marker(marker_string):
+    """
+    Parse a marker string and return a dictionary containing a marker expression.
+
+    The dictionary will contain keys "op", "lhs" and "rhs" for non-terminals in
+    the expression grammar, or strings. A string contained in quotes is to be
+    interpreted as a literal string, and a string not contained in quotes is a
+    variable (such as os_name).
+    """
+    def marker_var(remaining):
+        # either identifier, or literal string
+        m = IDENTIFIER.match(remaining)
+        if m:
+            result = m.groups()[0]
+            remaining = remaining[m.end():]
+        elif not remaining:
+            raise SyntaxError('unexpected end of input')
+        else:
+            q = remaining[0]
+            if q not in '\'"':
+                raise SyntaxError('invalid expression: %s' % remaining)
+            oq = '\'"'.replace(q, '')
+            remaining = remaining[1:]
+            parts = [q]
+            while remaining:
+                # either a string chunk, or oq, or q to terminate
+                if remaining[0] == q:
+                    break
+                elif remaining[0] == oq:
+                    parts.append(oq)
+                    remaining = remaining[1:]
+                else:
+                    m = STRING_CHUNK.match(remaining)
+                    if not m:
+                        raise SyntaxError('error in string literal: %s' % remaining)
+                    parts.append(m.groups()[0])
+                    remaining = remaining[m.end():]
+            else:
+                s = ''.join(parts)
+                raise SyntaxError('unterminated string: %s' % s)
+            parts.append(q)
+            result = ''.join(parts)
+            remaining = remaining[1:].lstrip() # skip past closing quote
+        return result, remaining
+
+    def marker_expr(remaining):
+        if remaining and remaining[0] == '(':
+            result, remaining = marker(remaining[1:].lstrip())
+            if remaining[0] != ')':
+                raise SyntaxError('unterminated parenthesis: %s' % remaining)
+            remaining = remaining[1:].lstrip()
+        else:
+            lhs, remaining = marker_var(remaining)
+            while remaining:
+                m = MARKER_OP.match(remaining)
+                if not m:
+                    break
+                op = m.groups()[0]
+                remaining = remaining[m.end():]
+                rhs, remaining = marker_var(remaining)
+                lhs = {'op': op, 'lhs': lhs, 'rhs': rhs}
+            result = lhs
+        return result, remaining
+
+    def marker_and(remaining):
+        lhs, remaining = marker_expr(remaining)
+        while remaining:
+            m = AND.match(remaining)
+            if not m:
+                break
+            remaining = remaining[m.end():]
+            rhs, remaining = marker_expr(remaining)
+            lhs = {'op': 'and', 'lhs': lhs, 'rhs': rhs}
+        return lhs, remaining
+
+    def marker(remaining):
+        lhs, remaining = marker_and(remaining)
+        while remaining:
+            m = OR.match(remaining)
+            if not m:
+                break
+            remaining = remaining[m.end():]
+            rhs, remaining = marker_and(remaining)
+            lhs = {'op': 'or', 'lhs': lhs, 'rhs': rhs}
+        return lhs, remaining
+
+    return marker(marker_string)
+
+
+def parse_requirement(req):
+    """
+    Parse a requirement passed in as a string. Return a Container
+    whose attributes contain the various parts of the requirement.
+    """
+    remaining = req.strip()
+    if not remaining or remaining.startswith('#'):
+        return None
+    m = IDENTIFIER.match(remaining)
+    if not m:
+        raise SyntaxError('name expected: %s' % remaining)
+    distname = m.groups()[0]
+    remaining = remaining[m.end():]
+    extras = mark_expr = versions = uri = None
+    if remaining and remaining[0] == '[':
+        i = remaining.find(']', 1)
+        if i < 0:
+            raise SyntaxError('unterminated extra: %s' % remaining)
+        s = remaining[1:i]
+        remaining = remaining[i + 1:].lstrip()
+        extras = []
+        while s:
+            m = IDENTIFIER.match(s)
+            if not m:
+                raise SyntaxError('malformed extra: %s' % s)
+            extras.append(m.groups()[0])
+            s = s[m.end():]
+            if not s:
+                break
+            if s[0] != ',':
+                raise SyntaxError('comma expected in extras: %s' % s)
+            s = s[1:].lstrip()
+        if not extras:
+            extras = None
+    if remaining:
+        if remaining[0] == '@':
+            # it's a URI
+            remaining = remaining[1:].lstrip()
+            m = NON_SPACE.match(remaining)
+            if not m:
+                raise SyntaxError('invalid URI: %s' % remaining)
+            uri = m.groups()[0]
+            t = urlparse(uri)
+            # there are issues with Python and URL parsing, so this test
+            # is a bit crude. See bpo-20271, bpo-23505. Python doesn't
+            # always parse invalid URLs correctly - it should raise
+            # exceptions for malformed URLs
+            if not (t.scheme and t.netloc):
+                raise SyntaxError('Invalid URL: %s' % uri)
+            remaining = remaining[m.end():].lstrip()
+        else:
+
+            def get_versions(ver_remaining):
+                """
+                Return a list of operator, version tuples if any are
+                specified, else None.
+                """
+                m = COMPARE_OP.match(ver_remaining)
+                versions = None
+                if m:
+                    versions = []
+                    while True:
+                        op = m.groups()[0]
+                        ver_remaining = ver_remaining[m.end():]
+                        m = VERSION_IDENTIFIER.match(ver_remaining)
+                        if not m:
+                            raise SyntaxError('invalid version: %s' % ver_remaining)
+                        v = m.groups()[0]
+                        versions.append((op, v))
+                        ver_remaining = ver_remaining[m.end():]
+                        if not ver_remaining or ver_remaining[0] != ',':
+                            break
+                        ver_remaining = ver_remaining[1:].lstrip()
+                        m = COMPARE_OP.match(ver_remaining)
+                        if not m:
+                            raise SyntaxError('invalid constraint: %s' % ver_remaining)
+                    if not versions:
+                        versions = None
+                return versions, ver_remaining
+
+            if remaining[0] != '(':
+                versions, remaining = get_versions(remaining)
+            else:
+                i = remaining.find(')', 1)
+                if i < 0:
+                    raise SyntaxError('unterminated parenthesis: %s' % remaining)
+                s = remaining[1:i]
+                remaining = remaining[i + 1:].lstrip()
+                # As a special diversion from PEP 508, allow a version number
+                # a.b.c in parentheses as a synonym for ~= a.b.c (because this
+                # is allowed in earlier PEPs)
+                if COMPARE_OP.match(s):
+                    versions, _ = get_versions(s)
+                else:
+                    m = VERSION_IDENTIFIER.match(s)
+                    if not m:
+                        raise SyntaxError('invalid constraint: %s' % s)
+                    v = m.groups()[0]
+                    s = s[m.end():].lstrip()
+                    if s:
+                        raise SyntaxError('invalid constraint: %s' % s)
+                    versions = [('~=', v)]
+
+    if remaining:
+        if remaining[0] != ';':
+            raise SyntaxError('invalid requirement: %s' % remaining)
+        remaining = remaining[1:].lstrip()
+
+        mark_expr, remaining = parse_marker(remaining)
+
+    if remaining and remaining[0] != '#':
+        raise SyntaxError('unexpected trailing data: %s' % remaining)
+
+    if not versions:
+        rs = distname
+    else:
+        rs = '%s %s' % (distname, ', '.join(['%s %s' % con for con in versions]))
+    return Container(name=distname, extras=extras, constraints=versions,
+                     marker=mark_expr, url=uri, requirement=rs)
+
+
+def get_resources_dests(resources_root, rules):
+    """Find destinations for resources files"""
+
+    def get_rel_path(root, path):
+        # normalizes and returns a lstripped-/-separated path
+        root = root.replace(os.path.sep, '/')
+        path = path.replace(os.path.sep, '/')
+        assert path.startswith(root)
+        return path[len(root):].lstrip('/')
+
+    destinations = {}
+    for base, suffix, dest in rules:
+        prefix = os.path.join(resources_root, base)
+        for abs_base in iglob(prefix):
+            abs_glob = os.path.join(abs_base, suffix)
+            for abs_path in iglob(abs_glob):
+                resource_file = get_rel_path(resources_root, abs_path)
+                if dest is None:  # remove the entry if it was here
+                    destinations.pop(resource_file, None)
+                else:
+                    rel_path = get_rel_path(abs_base, abs_path)
+                    rel_dest = dest.replace(os.path.sep, '/').rstrip('/')
+                    destinations[resource_file] = rel_dest + '/' + rel_path
+    return destinations
+
+
+def in_venv():
+    if hasattr(sys, 'real_prefix'):
+        # virtualenv venvs
+        result = True
+    else:
+        # PEP 405 venvs
+        result = sys.prefix != getattr(sys, 'base_prefix', sys.prefix)
+    return result
+
+
+def get_executable():
+# The __PYVENV_LAUNCHER__ dance is apparently no longer needed, as
+# changes to the stub launcher mean that sys.executable always points
+# to the stub on OS X
+#    if sys.platform == 'darwin' and ('__PYVENV_LAUNCHER__'
+#                                     in os.environ):
+#        result =  os.environ['__PYVENV_LAUNCHER__']
+#    else:
+#        result = sys.executable
+#    return result
+    result = os.path.normcase(sys.executable)
+    if not isinstance(result, text_type):
+        result = fsdecode(result)
+    return result
+
+
+def proceed(prompt, allowed_chars, error_prompt=None, default=None):
+    p = prompt
+    while True:
+        s = raw_input(p)
+        p = prompt
+        if not s and default:
+            s = default
+        if s:
+            c = s[0].lower()
+            if c in allowed_chars:
+                break
+            if error_prompt:
+                p = '%c: %s\n%s' % (c, error_prompt, prompt)
+    return c
+
+
+def extract_by_key(d, keys):
+    if isinstance(keys, string_types):
+        keys = keys.split()
+    result = {}
+    for key in keys:
+        if key in d:
+            result[key] = d[key]
+    return result
+
+def read_exports(stream):
+    if sys.version_info[0] >= 3:
+        # needs to be a text stream
+        stream = codecs.getreader('utf-8')(stream)
+    # Try to load as JSON, falling back on legacy format
+    data = stream.read()
+    stream = StringIO(data)
+    try:
+        jdata = json.load(stream)
+        result = jdata['extensions']['python.exports']['exports']
+        for group, entries in result.items():
+            for k, v in entries.items():
+                s = '%s = %s' % (k, v)
+                entry = get_export_entry(s)
+                assert entry is not None
+                entries[k] = entry
+        return result
+    except Exception:
+        stream.seek(0, 0)
+
+    def read_stream(cp, stream):
+        if hasattr(cp, 'read_file'):
+            cp.read_file(stream)
+        else:
+            cp.readfp(stream)
+
+    cp = configparser.ConfigParser()
+    try:
+        read_stream(cp, stream)
+    except configparser.MissingSectionHeaderError:
+        stream.close()
+        data = textwrap.dedent(data)
+        stream = StringIO(data)
+        read_stream(cp, stream)
+
+    result = {}
+    for key in cp.sections():
+        result[key] = entries = {}
+        for name, value in cp.items(key):
+            s = '%s = %s' % (name, value)
+            entry = get_export_entry(s)
+            assert entry is not None
+            #entry.dist = self
+            entries[name] = entry
+    return result
+
+
+def write_exports(exports, stream):
+    if sys.version_info[0] >= 3:
+        # needs to be a text stream
+        stream = codecs.getwriter('utf-8')(stream)
+    cp = configparser.ConfigParser()
+    for k, v in exports.items():
+        # TODO check k, v for valid values
+        cp.add_section(k)
+        for entry in v.values():
+            if entry.suffix is None:
+                s = entry.prefix
+            else:
+                s = '%s:%s' % (entry.prefix, entry.suffix)
+            if entry.flags:
+                s = '%s [%s]' % (s, ', '.join(entry.flags))
+            cp.set(k, entry.name, s)
+    cp.write(stream)
+
+
+@contextlib.contextmanager
+def tempdir():
+    td = tempfile.mkdtemp()
+    try:
+        yield td
+    finally:
+        shutil.rmtree(td)
+
+@contextlib.contextmanager
+def chdir(d):
+    cwd = os.getcwd()
+    try:
+        os.chdir(d)
+        yield
+    finally:
+        os.chdir(cwd)
+
+
+@contextlib.contextmanager
+def socket_timeout(seconds=15):
+    cto = socket.getdefaulttimeout()
+    try:
+        socket.setdefaulttimeout(seconds)
+        yield
+    finally:
+        socket.setdefaulttimeout(cto)
+
+
+class cached_property(object):
+    def __init__(self, func):
+        self.func = func
+        #for attr in ('__name__', '__module__', '__doc__'):
+        #    setattr(self, attr, getattr(func, attr, None))
+
+    def __get__(self, obj, cls=None):
+        if obj is None:
+            return self
+        value = self.func(obj)
+        object.__setattr__(obj, self.func.__name__, value)
+        #obj.__dict__[self.func.__name__] = value = self.func(obj)
+        return value
+
+def convert_path(pathname):
+    """Return 'pathname' as a name that will work on the native filesystem.
+
+    The path is split on '/' and put back together again using the current
+    directory separator.  Needed because filenames in the setup script are
+    always supplied in Unix style, and have to be converted to the local
+    convention before we can actually use them in the filesystem.  Raises
+    ValueError on non-Unix-ish systems if 'pathname' either starts or
+    ends with a slash.
+    """
+    if os.sep == '/':
+        return pathname
+    if not pathname:
+        return pathname
+    if pathname[0] == '/':
+        raise ValueError("path '%s' cannot be absolute" % pathname)
+    if pathname[-1] == '/':
+        raise ValueError("path '%s' cannot end with '/'" % pathname)
+
+    paths = pathname.split('/')
+    while os.curdir in paths:
+        paths.remove(os.curdir)
+    if not paths:
+        return os.curdir
+    return os.path.join(*paths)
+
+
+class FileOperator(object):
+    def __init__(self, dry_run=False):
+        self.dry_run = dry_run
+        self.ensured = set()
+        self._init_record()
+
+    def _init_record(self):
+        self.record = False
+        self.files_written = set()
+        self.dirs_created = set()
+
+    def record_as_written(self, path):
+        if self.record:
+            self.files_written.add(path)
+
+    def newer(self, source, target):
+        """Tell if the target is newer than the source.
+
+        Returns true if 'source' exists and is more recently modified than
+        'target', or if 'source' exists and 'target' doesn't.
+
+        Returns false if both exist and 'target' is the same age or younger
+        than 'source'. Raise PackagingFileError if 'source' does not exist.
+
+        Note that this test is not very accurate: files created in the same
+        second will have the same "age".
+        """
+        if not os.path.exists(source):
+            raise DistlibException("file '%r' does not exist" %
+                                   os.path.abspath(source))
+        if not os.path.exists(target):
+            return True
+
+        return os.stat(source).st_mtime > os.stat(target).st_mtime
+
+    def copy_file(self, infile, outfile, check=True):
+        """Copy a file respecting dry-run and force flags.
+        """
+        self.ensure_dir(os.path.dirname(outfile))
+        logger.info('Copying %s to %s', infile, outfile)
+        if not self.dry_run:
+            msg = None
+            if check:
+                if os.path.islink(outfile):
+                    msg = '%s is a symlink' % outfile
+                elif os.path.exists(outfile) and not os.path.isfile(outfile):
+                    msg = '%s is a non-regular file' % outfile
+            if msg:
+                raise ValueError(msg + ' which would be overwritten')
+            shutil.copyfile(infile, outfile)
+        self.record_as_written(outfile)
+
+    def copy_stream(self, instream, outfile, encoding=None):
+        assert not os.path.isdir(outfile)
+        self.ensure_dir(os.path.dirname(outfile))
+        logger.info('Copying stream %s to %s', instream, outfile)
+        if not self.dry_run:
+            if encoding is None:
+                outstream = open(outfile, 'wb')
+            else:
+                outstream = codecs.open(outfile, 'w', encoding=encoding)
+            try:
+                shutil.copyfileobj(instream, outstream)
+            finally:
+                outstream.close()
+        self.record_as_written(outfile)
+
+    def write_binary_file(self, path, data):
+        self.ensure_dir(os.path.dirname(path))
+        if not self.dry_run:
+            if os.path.exists(path):
+                os.remove(path)
+            with open(path, 'wb') as f:
+                f.write(data)
+        self.record_as_written(path)
+
+    def write_text_file(self, path, data, encoding):
+        self.write_binary_file(path, data.encode(encoding))
+
+    def set_mode(self, bits, mask, files):
+        if os.name == 'posix' or (os.name == 'java' and os._name == 'posix'):
+            # Set the executable bits (owner, group, and world) on
+            # all the files specified.
+            for f in files:
+                if self.dry_run:
+                    logger.info("changing mode of %s", f)
+                else:
+                    mode = (os.stat(f).st_mode | bits) & mask
+                    logger.info("changing mode of %s to %o", f, mode)
+                    os.chmod(f, mode)
+
+    set_executable_mode = lambda s, f: s.set_mode(0o555, 0o7777, f)
+
+    def ensure_dir(self, path):
+        path = os.path.abspath(path)
+        if path not in self.ensured and not os.path.exists(path):
+            self.ensured.add(path)
+            d, f = os.path.split(path)
+            self.ensure_dir(d)
+            logger.info('Creating %s' % path)
+            if not self.dry_run:
+                os.mkdir(path)
+            if self.record:
+                self.dirs_created.add(path)
+
+    def byte_compile(self, path, optimize=False, force=False, prefix=None, hashed_invalidation=False):
+        dpath = cache_from_source(path, not optimize)
+        logger.info('Byte-compiling %s to %s', path, dpath)
+        if not self.dry_run:
+            if force or self.newer(path, dpath):
+                if not prefix:
+                    diagpath = None
+                else:
+                    assert path.startswith(prefix)
+                    diagpath = path[len(prefix):]
+            compile_kwargs = {}
+            if hashed_invalidation and hasattr(py_compile, 'PycInvalidationMode'):
+                compile_kwargs['invalidation_mode'] = py_compile.PycInvalidationMode.CHECKED_HASH
+            py_compile.compile(path, dpath, diagpath, True, **compile_kwargs)     # raise error
+        self.record_as_written(dpath)
+        return dpath
+
+    def ensure_removed(self, path):
+        if os.path.exists(path):
+            if os.path.isdir(path) and not os.path.islink(path):
+                logger.debug('Removing directory tree at %s', path)
+                if not self.dry_run:
+                    shutil.rmtree(path)
+                if self.record:
+                    if path in self.dirs_created:
+                        self.dirs_created.remove(path)
+            else:
+                if os.path.islink(path):
+                    s = 'link'
+                else:
+                    s = 'file'
+                logger.debug('Removing %s %s', s, path)
+                if not self.dry_run:
+                    os.remove(path)
+                if self.record:
+                    if path in self.files_written:
+                        self.files_written.remove(path)
+
+    def is_writable(self, path):
+        result = False
+        while not result:
+            if os.path.exists(path):
+                result = os.access(path, os.W_OK)
+                break
+            parent = os.path.dirname(path)
+            if parent == path:
+                break
+            path = parent
+        return result
+
+    def commit(self):
+        """
+        Commit recorded changes, turn off recording, return
+        changes.
+        """
+        assert self.record
+        result = self.files_written, self.dirs_created
+        self._init_record()
+        return result
+
+    def rollback(self):
+        if not self.dry_run:
+            for f in list(self.files_written):
+                if os.path.exists(f):
+                    os.remove(f)
+            # dirs should all be empty now, except perhaps for
+            # __pycache__ subdirs
+            # reverse so that subdirs appear before their parents
+            dirs = sorted(self.dirs_created, reverse=True)
+            for d in dirs:
+                flist = os.listdir(d)
+                if flist:
+                    assert flist == ['__pycache__']
+                    sd = os.path.join(d, flist[0])
+                    os.rmdir(sd)
+                os.rmdir(d)     # should fail if non-empty
+        self._init_record()
+
+def resolve(module_name, dotted_path):
+    if module_name in sys.modules:
+        mod = sys.modules[module_name]
+    else:
+        mod = __import__(module_name)
+    if dotted_path is None:
+        result = mod
+    else:
+        parts = dotted_path.split('.')
+        result = getattr(mod, parts.pop(0))
+        for p in parts:
+            result = getattr(result, p)
+    return result
+
+
+class ExportEntry(object):
+    def __init__(self, name, prefix, suffix, flags):
+        self.name = name
+        self.prefix = prefix
+        self.suffix = suffix
+        self.flags = flags
+
+    @cached_property
+    def value(self):
+        return resolve(self.prefix, self.suffix)
+
+    def __repr__(self):  # pragma: no cover
+        return '<ExportEntry %s = %s:%s %s>' % (self.name, self.prefix,
+                                                self.suffix, self.flags)
+
+    def __eq__(self, other):
+        if not isinstance(other, ExportEntry):
+            result = False
+        else:
+            result = (self.name == other.name and
+                      self.prefix == other.prefix and
+                      self.suffix == other.suffix and
+                      self.flags == other.flags)
+        return result
+
+    __hash__ = object.__hash__
+
+
+ENTRY_RE = re.compile(r'''(?P<name>(\w|[-.+])+)
+                      \s*=\s*(?P<callable>(\w+)([:\.]\w+)*)
+                      \s*(\[\s*(?P<flags>[\w-]+(=\w+)?(,\s*\w+(=\w+)?)*)\s*\])?
+                      ''', re.VERBOSE)
+
+def get_export_entry(specification):
+    m = ENTRY_RE.search(specification)
+    if not m:
+        result = None
+        if '[' in specification or ']' in specification:
+            raise DistlibException("Invalid specification "
+                                   "'%s'" % specification)
+    else:
+        d = m.groupdict()
+        name = d['name']
+        path = d['callable']
+        colons = path.count(':')
+        if colons == 0:
+            prefix, suffix = path, None
+        else:
+            if colons != 1:
+                raise DistlibException("Invalid specification "
+                                       "'%s'" % specification)
+            prefix, suffix = path.split(':')
+        flags = d['flags']
+        if flags is None:
+            if '[' in specification or ']' in specification:
+                raise DistlibException("Invalid specification "
+                                       "'%s'" % specification)
+            flags = []
+        else:
+            flags = [f.strip() for f in flags.split(',')]
+        result = ExportEntry(name, prefix, suffix, flags)
+    return result
+
+
+def get_cache_base(suffix=None):
+    """
+    Return the default base location for distlib caches. If the directory does
+    not exist, it is created. Use the suffix provided for the base directory,
+    and default to '.distlib' if it isn't provided.
+
+    On Windows, if LOCALAPPDATA is defined in the environment, then it is
+    assumed to be a directory, and will be the parent directory of the result.
+    On POSIX, and on Windows if LOCALAPPDATA is not defined, the user's home
+    directory - using os.expanduser('~') - will be the parent directory of
+    the result.
+
+    The result is just the directory '.distlib' in the parent directory as
+    determined above, or with the name specified with ``suffix``.
+    """
+    if suffix is None:
+        suffix = '.distlib'
+    if os.name == 'nt' and 'LOCALAPPDATA' in os.environ:
+        result = os.path.expandvars('$localappdata')
+    else:
+        # Assume posix, or old Windows
+        result = os.path.expanduser('~')
+    # we use 'isdir' instead of 'exists', because we want to
+    # fail if there's a file with that name
+    if os.path.isdir(result):
+        usable = os.access(result, os.W_OK)
+        if not usable:
+            logger.warning('Directory exists but is not writable: %s', result)
+    else:
+        try:
+            os.makedirs(result)
+            usable = True
+        except OSError:
+            logger.warning('Unable to create %s', result, exc_info=True)
+            usable = False
+    if not usable:
+        result = tempfile.mkdtemp()
+        logger.warning('Default location unusable, using %s', result)
+    return os.path.join(result, suffix)
+
+
+def path_to_cache_dir(path):
+    """
+    Convert an absolute path to a directory name for use in a cache.
+
+    The algorithm used is:
+
+    #. On Windows, any ``':'`` in the drive is replaced with ``'---'``.
+    #. Any occurrence of ``os.sep`` is replaced with ``'--'``.
+    #. ``'.cache'`` is appended.
+    """
+    d, p = os.path.splitdrive(os.path.abspath(path))
+    if d:
+        d = d.replace(':', '---')
+    p = p.replace(os.sep, '--')
+    return d + p + '.cache'
+
+
+def ensure_slash(s):
+    if not s.endswith('/'):
+        return s + '/'
+    return s
+
+
+def parse_credentials(netloc):
+    username = password = None
+    if '@' in netloc:
+        prefix, netloc = netloc.rsplit('@', 1)
+        if ':' not in prefix:
+            username = prefix
+        else:
+            username, password = prefix.split(':', 1)
+    if username:
+        username = unquote(username)
+    if password:
+        password = unquote(password)
+    return username, password, netloc
+
+
+def get_process_umask():
+    result = os.umask(0o22)
+    os.umask(result)
+    return result
+
+def is_string_sequence(seq):
+    result = True
+    i = None
+    for i, s in enumerate(seq):
+        if not isinstance(s, string_types):
+            result = False
+            break
+    assert i is not None
+    return result
+
+PROJECT_NAME_AND_VERSION = re.compile('([a-z0-9_]+([.-][a-z_][a-z0-9_]*)*)-'
+                                      '([a-z0-9_.+-]+)', re.I)
+PYTHON_VERSION = re.compile(r'-py(\d\.?\d?)')
+
+
+def split_filename(filename, project_name=None):
+    """
+    Extract name, version, python version from a filename (no extension)
+
+    Return name, version, pyver or None
+    """
+    result = None
+    pyver = None
+    filename = unquote(filename).replace(' ', '-')
+    m = PYTHON_VERSION.search(filename)
+    if m:
+        pyver = m.group(1)
+        filename = filename[:m.start()]
+    if project_name and len(filename) > len(project_name) + 1:
+        m = re.match(re.escape(project_name) + r'\b', filename)
+        if m:
+            n = m.end()
+            result = filename[:n], filename[n + 1:], pyver
+    if result is None:
+        m = PROJECT_NAME_AND_VERSION.match(filename)
+        if m:
+            result = m.group(1), m.group(3), pyver
+    return result
+
+# Allow spaces in name because of legacy dists like "Twisted Core"
+NAME_VERSION_RE = re.compile(r'(?P<name>[\w .-]+)\s*'
+                             r'\(\s*(?P<ver>[^\s)]+)\)$')
+
+def parse_name_and_version(p):
+    """
+    A utility method used to get name and version from a string.
+
+    From e.g. a Provides-Dist value.
+
+    :param p: A value in a form 'foo (1.0)'
+    :return: The name and version as a tuple.
+    """
+    m = NAME_VERSION_RE.match(p)
+    if not m:
+        raise DistlibException('Ill-formed name/version string: \'%s\'' % p)
+    d = m.groupdict()
+    return d['name'].strip().lower(), d['ver']
+
+def get_extras(requested, available):
+    result = set()
+    requested = set(requested or [])
+    available = set(available or [])
+    if '*' in requested:
+        requested.remove('*')
+        result |= available
+    for r in requested:
+        if r == '-':
+            result.add(r)
+        elif r.startswith('-'):
+            unwanted = r[1:]
+            if unwanted not in available:
+                logger.warning('undeclared extra: %s' % unwanted)
+            if unwanted in result:
+                result.remove(unwanted)
+        else:
+            if r not in available:
+                logger.warning('undeclared extra: %s' % r)
+            result.add(r)
+    return result
+#
+# Extended metadata functionality
+#
+
+def _get_external_data(url):
+    result = {}
+    try:
+        # urlopen might fail if it runs into redirections,
+        # because of Python issue #13696. Fixed in locators
+        # using a custom redirect handler.
+        resp = urlopen(url)
+        headers = resp.info()
+        ct = headers.get('Content-Type')
+        if not ct.startswith('application/json'):
+            logger.debug('Unexpected response for JSON request: %s', ct)
+        else:
+            reader = codecs.getreader('utf-8')(resp)
+            #data = reader.read().decode('utf-8')
+            #result = json.loads(data)
+            result = json.load(reader)
+    except Exception as e:
+        logger.exception('Failed to get external data for %s: %s', url, e)
+    return result
+
+_external_data_base_url = 'https://www.red-dove.com/pypi/projects/'
+
+def get_project_data(name):
+    url = '%s/%s/project.json' % (name[0].upper(), name)
+    url = urljoin(_external_data_base_url, url)
+    result = _get_external_data(url)
+    return result
+
+def get_package_data(name, version):
+    url = '%s/%s/package-%s.json' % (name[0].upper(), name, version)
+    url = urljoin(_external_data_base_url, url)
+    return _get_external_data(url)
+
+
+class Cache(object):
+    """
+    A class implementing a cache for resources that need to live in the file system
+    e.g. shared libraries. This class was moved from resources to here because it
+    could be used by other modules, e.g. the wheel module.
+    """
+
+    def __init__(self, base):
+        """
+        Initialise an instance.
+
+        :param base: The base directory where the cache should be located.
+        """
+        # we use 'isdir' instead of 'exists', because we want to
+        # fail if there's a file with that name
+        if not os.path.isdir(base):  # pragma: no cover
+            os.makedirs(base)
+        if (os.stat(base).st_mode & 0o77) != 0:
+            logger.warning('Directory \'%s\' is not private', base)
+        self.base = os.path.abspath(os.path.normpath(base))
+
+    def prefix_to_dir(self, prefix):
+        """
+        Converts a resource prefix to a directory name in the cache.
+        """
+        return path_to_cache_dir(prefix)
+
+    def clear(self):
+        """
+        Clear the cache.
+        """
+        not_removed = []
+        for fn in os.listdir(self.base):
+            fn = os.path.join(self.base, fn)
+            try:
+                if os.path.islink(fn) or os.path.isfile(fn):
+                    os.remove(fn)
+                elif os.path.isdir(fn):
+                    shutil.rmtree(fn)
+            except Exception:
+                not_removed.append(fn)
+        return not_removed
+
+
+class EventMixin(object):
+    """
+    A very simple publish/subscribe system.
+    """
+    def __init__(self):
+        self._subscribers = {}
+
+    def add(self, event, subscriber, append=True):
+        """
+        Add a subscriber for an event.
+
+        :param event: The name of an event.
+        :param subscriber: The subscriber to be added (and called when the
+                           event is published).
+        :param append: Whether to append or prepend the subscriber to an
+                       existing subscriber list for the event.
+        """
+        subs = self._subscribers
+        if event not in subs:
+            subs[event] = deque([subscriber])
+        else:
+            sq = subs[event]
+            if append:
+                sq.append(subscriber)
+            else:
+                sq.appendleft(subscriber)
+
+    def remove(self, event, subscriber):
+        """
+        Remove a subscriber for an event.
+
+        :param event: The name of an event.
+        :param subscriber: The subscriber to be removed.
+        """
+        subs = self._subscribers
+        if event not in subs:
+            raise ValueError('No subscribers: %r' % event)
+        subs[event].remove(subscriber)
+
+    def get_subscribers(self, event):
+        """
+        Return an iterator for the subscribers for an event.
+        :param event: The event to return subscribers for.
+        """
+        return iter(self._subscribers.get(event, ()))
+
+    def publish(self, event, *args, **kwargs):
+        """
+        Publish a event and return a list of values returned by its
+        subscribers.
+
+        :param event: The event to publish.
+        :param args: The positional arguments to pass to the event's
+                     subscribers.
+        :param kwargs: The keyword arguments to pass to the event's
+                       subscribers.
+        """
+        result = []
+        for subscriber in self.get_subscribers(event):
+            try:
+                value = subscriber(event, *args, **kwargs)
+            except Exception:
+                logger.exception('Exception during event publication')
+                value = None
+            result.append(value)
+        logger.debug('publish %s: args = %s, kwargs = %s, result = %s',
+                     event, args, kwargs, result)
+        return result
+
+#
+# Simple sequencing
+#
+class Sequencer(object):
+    def __init__(self):
+        self._preds = {}
+        self._succs = {}
+        self._nodes = set()     # nodes with no preds/succs
+
+    def add_node(self, node):
+        self._nodes.add(node)
+
+    def remove_node(self, node, edges=False):
+        if node in self._nodes:
+            self._nodes.remove(node)
+        if edges:
+            for p in set(self._preds.get(node, ())):
+                self.remove(p, node)
+            for s in set(self._succs.get(node, ())):
+                self.remove(node, s)
+            # Remove empties
+            for k, v in list(self._preds.items()):
+                if not v:
+                    del self._preds[k]
+            for k, v in list(self._succs.items()):
+                if not v:
+                    del self._succs[k]
+
+    def add(self, pred, succ):
+        assert pred != succ
+        self._preds.setdefault(succ, set()).add(pred)
+        self._succs.setdefault(pred, set()).add(succ)
+
+    def remove(self, pred, succ):
+        assert pred != succ
+        try:
+            preds = self._preds[succ]
+            succs = self._succs[pred]
+        except KeyError:  # pragma: no cover
+            raise ValueError('%r not a successor of anything' % succ)
+        try:
+            preds.remove(pred)
+            succs.remove(succ)
+        except KeyError:  # pragma: no cover
+            raise ValueError('%r not a successor of %r' % (succ, pred))
+
+    def is_step(self, step):
+        return (step in self._preds or step in self._succs or
+                step in self._nodes)
+
+    def get_steps(self, final):
+        if not self.is_step(final):
+            raise ValueError('Unknown: %r' % final)
+        result = []
+        todo = []
+        seen = set()
+        todo.append(final)
+        while todo:
+            step = todo.pop(0)
+            if step in seen:
+                # if a step was already seen,
+                # move it to the end (so it will appear earlier
+                # when reversed on return) ... but not for the
+                # final step, as that would be confusing for
+                # users
+                if step != final:
+                    result.remove(step)
+                    result.append(step)
+            else:
+                seen.add(step)
+                result.append(step)
+                preds = self._preds.get(step, ())
+                todo.extend(preds)
+        return reversed(result)
+
+    @property
+    def strong_connections(self):
+        #http://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm
+        index_counter = [0]
+        stack = []
+        lowlinks = {}
+        index = {}
+        result = []
+
+        graph = self._succs
+
+        def strongconnect(node):
+            # set the depth index for this node to the smallest unused index
+            index[node] = index_counter[0]
+            lowlinks[node] = index_counter[0]
+            index_counter[0] += 1
+            stack.append(node)
+
+            # Consider successors
+            try:
+                successors = graph[node]
+            except Exception:
+                successors = []
+            for successor in successors:
+                if successor not in lowlinks:
+                    # Successor has not yet been visited
+                    strongconnect(successor)
+                    lowlinks[node] = min(lowlinks[node],lowlinks[successor])
+                elif successor in stack:
+                    # the successor is in the stack and hence in the current
+                    # strongly connected component (SCC)
+                    lowlinks[node] = min(lowlinks[node],index[successor])
+
+            # If `node` is a root node, pop the stack and generate an SCC
+            if lowlinks[node] == index[node]:
+                connected_component = []
+
+                while True:
+                    successor = stack.pop()
+                    connected_component.append(successor)
+                    if successor == node: break
+                component = tuple(connected_component)
+                # storing the result
+                result.append(component)
+
+        for node in graph:
+            if node not in lowlinks:
+                strongconnect(node)
+
+        return result
+
+    @property
+    def dot(self):
+        result = ['digraph G {']
+        for succ in self._preds:
+            preds = self._preds[succ]
+            for pred in preds:
+                result.append('  %s -> %s;' % (pred, succ))
+        for node in self._nodes:
+            result.append('  %s;' % node)
+        result.append('}')
+        return '\n'.join(result)
+
+#
+# Unarchiving functionality for zip, tar, tgz, tbz, whl
+#
+
+ARCHIVE_EXTENSIONS = ('.tar.gz', '.tar.bz2', '.tar', '.zip',
+                      '.tgz', '.tbz', '.whl')
+
+def unarchive(archive_filename, dest_dir, format=None, check=True):
+
+    def check_path(path):
+        if not isinstance(path, text_type):
+            path = path.decode('utf-8')
+        p = os.path.abspath(os.path.join(dest_dir, path))
+        if not p.startswith(dest_dir) or p[plen] != os.sep:
+            raise ValueError('path outside destination: %r' % p)
+
+    dest_dir = os.path.abspath(dest_dir)
+    plen = len(dest_dir)
+    archive = None
+    if format is None:
+        if archive_filename.endswith(('.zip', '.whl')):
+            format = 'zip'
+        elif archive_filename.endswith(('.tar.gz', '.tgz')):
+            format = 'tgz'
+            mode = 'r:gz'
+        elif archive_filename.endswith(('.tar.bz2', '.tbz')):
+            format = 'tbz'
+            mode = 'r:bz2'
+        elif archive_filename.endswith('.tar'):
+            format = 'tar'
+            mode = 'r'
+        else:  # pragma: no cover
+            raise ValueError('Unknown format for %r' % archive_filename)
+    try:
+        if format == 'zip':
+            archive = ZipFile(archive_filename, 'r')
+            if check:
+                names = archive.namelist()
+                for name in names:
+                    check_path(name)
+        else:
+            archive = tarfile.open(archive_filename, mode)
+            if check:
+                names = archive.getnames()
+                for name in names:
+                    check_path(name)
+        if format != 'zip' and sys.version_info[0] < 3:
+            # See Python issue 17153. If the dest path contains Unicode,
+            # tarfile extraction fails on Python 2.x if a member path name
+            # contains non-ASCII characters - it leads to an implicit
+            # bytes -> unicode conversion using ASCII to decode.
+            for tarinfo in archive.getmembers():
+                if not isinstance(tarinfo.name, text_type):
+                    tarinfo.name = tarinfo.name.decode('utf-8')
+        archive.extractall(dest_dir)
+
+    finally:
+        if archive:
+            archive.close()
+
+
+def zip_dir(directory):
+    """zip a directory tree into a BytesIO object"""
+    result = io.BytesIO()
+    dlen = len(directory)
+    with ZipFile(result, "w") as zf:
+        for root, dirs, files in os.walk(directory):
+            for name in files:
+                full = os.path.join(root, name)
+                rel = root[dlen:]
+                dest = os.path.join(rel, name)
+                zf.write(full, dest)
+    return result
+
+#
+# Simple progress bar
+#
+
+UNITS = ('', 'K', 'M', 'G','T','P')
+
+
+class Progress(object):
+    unknown = 'UNKNOWN'
+
+    def __init__(self, minval=0, maxval=100):
+        assert maxval is None or maxval >= minval
+        self.min = self.cur = minval
+        self.max = maxval
+        self.started = None
+        self.elapsed = 0
+        self.done = False
+
+    def update(self, curval):
+        assert self.min <= curval
+        assert self.max is None or curval <= self.max
+        self.cur = curval
+        now = time.time()
+        if self.started is None:
+            self.started = now
+        else:
+            self.elapsed = now - self.started
+
+    def increment(self, incr):
+        assert incr >= 0
+        self.update(self.cur + incr)
+
+    def start(self):
+        self.update(self.min)
+        return self
+
+    def stop(self):
+        if self.max is not None:
+            self.update(self.max)
+        self.done = True
+
+    @property
+    def maximum(self):
+        return self.unknown if self.max is None else self.max
+
+    @property
+    def percentage(self):
+        if self.done:
+            result = '100 %'
+        elif self.max is None:
+            result = ' ?? %'
+        else:
+            v = 100.0 * (self.cur - self.min) / (self.max - self.min)
+            result = '%3d %%' % v
+        return result
+
+    def format_duration(self, duration):
+        if (duration <= 0) and self.max is None or self.cur == self.min:
+            result = '??:??:??'
+        #elif duration < 1:
+        #    result = '--:--:--'
+        else:
+            result = time.strftime('%H:%M:%S', time.gmtime(duration))
+        return result
+
+    @property
+    def ETA(self):
+        if self.done:
+            prefix = 'Done'
+            t = self.elapsed
+            #import pdb; pdb.set_trace()
+        else:
+            prefix = 'ETA '
+            if self.max is None:
+                t = -1
+            elif self.elapsed == 0 or (self.cur == self.min):
+                t = 0
+            else:
+                #import pdb; pdb.set_trace()
+                t = float(self.max - self.min)
+                t /= self.cur - self.min
+                t = (t - 1) * self.elapsed
+        return '%s: %s' % (prefix, self.format_duration(t))
+
+    @property
+    def speed(self):
+        if self.elapsed == 0:
+            result = 0.0
+        else:
+            result = (self.cur - self.min) / self.elapsed
+        for unit in UNITS:
+            if result < 1000:
+                break
+            result /= 1000.0
+        return '%d %sB/s' % (result, unit)
+
+#
+# Glob functionality
+#
+
+RICH_GLOB = re.compile(r'\{([^}]*)\}')
+_CHECK_RECURSIVE_GLOB = re.compile(r'[^/\\,{]\*\*|\*\*[^/\\,}]')
+_CHECK_MISMATCH_SET = re.compile(r'^[^{]*\}|\{[^}]*$')
+
+
+def iglob(path_glob):
+    """Extended globbing function that supports ** and {opt1,opt2,opt3}."""
+    if _CHECK_RECURSIVE_GLOB.search(path_glob):
+        msg = """invalid glob %r: recursive glob "**" must be used alone"""
+        raise ValueError(msg % path_glob)
+    if _CHECK_MISMATCH_SET.search(path_glob):
+        msg = """invalid glob %r: mismatching set marker '{' or '}'"""
+        raise ValueError(msg % path_glob)
+    return _iglob(path_glob)
+
+
+def _iglob(path_glob):
+    rich_path_glob = RICH_GLOB.split(path_glob, 1)
+    if len(rich_path_glob) > 1:
+        assert len(rich_path_glob) == 3, rich_path_glob
+        prefix, set, suffix = rich_path_glob
+        for item in set.split(','):
+            for path in _iglob(''.join((prefix, item, suffix))):
+                yield path
+    else:
+        if '**' not in path_glob:
+            for item in std_iglob(path_glob):
+                yield item
+        else:
+            prefix, radical = path_glob.split('**', 1)
+            if prefix == '':
+                prefix = '.'
+            if radical == '':
+                radical = '*'
+            else:
+                # we support both
+                radical = radical.lstrip('/')
+                radical = radical.lstrip('\\')
+            for path, dir, files in os.walk(prefix):
+                path = os.path.normpath(path)
+                for fn in _iglob(os.path.join(path, radical)):
+                    yield fn
+
+if ssl:
+    from .compat import (HTTPSHandler as BaseHTTPSHandler, match_hostname,
+                         CertificateError)
+
+
+#
+# HTTPSConnection which verifies certificates/matches domains
+#
+
+    class HTTPSConnection(httplib.HTTPSConnection):
+        ca_certs = None # set this to the path to the certs file (.pem)
+        check_domain = True # only used if ca_certs is not None
+
+        # noinspection PyPropertyAccess
+        def connect(self):
+            sock = socket.create_connection((self.host, self.port), self.timeout)
+            if getattr(self, '_tunnel_host', False):
+                self.sock = sock
+                self._tunnel()
+
+            if not hasattr(ssl, 'SSLContext'):
+                # For 2.x
+                if self.ca_certs:
+                    cert_reqs = ssl.CERT_REQUIRED
+                else:
+                    cert_reqs = ssl.CERT_NONE
+                self.sock = ssl.wrap_socket(sock, self.key_file, self.cert_file,
+                                            cert_reqs=cert_reqs,
+                                            ssl_version=ssl.PROTOCOL_SSLv23,
+                                            ca_certs=self.ca_certs)
+            else:  # pragma: no cover
+                context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
+                if hasattr(ssl, 'OP_NO_SSLv2'):
+                    context.options |= ssl.OP_NO_SSLv2
+                if self.cert_file:
+                    context.load_cert_chain(self.cert_file, self.key_file)
+                kwargs = {}
+                if self.ca_certs:
+                    context.verify_mode = ssl.CERT_REQUIRED
+                    context.load_verify_locations(cafile=self.ca_certs)
+                    if getattr(ssl, 'HAS_SNI', False):
+                        kwargs['server_hostname'] = self.host
+                self.sock = context.wrap_socket(sock, **kwargs)
+            if self.ca_certs and self.check_domain:
+                try:
+                    match_hostname(self.sock.getpeercert(), self.host)
+                    logger.debug('Host verified: %s', self.host)
+                except CertificateError:  # pragma: no cover
+                    self.sock.shutdown(socket.SHUT_RDWR)
+                    self.sock.close()
+                    raise
+
+    class HTTPSHandler(BaseHTTPSHandler):
+        def __init__(self, ca_certs, check_domain=True):
+            BaseHTTPSHandler.__init__(self)
+            self.ca_certs = ca_certs
+            self.check_domain = check_domain
+
+        def _conn_maker(self, *args, **kwargs):
+            """
+            This is called to create a connection instance. Normally you'd
+            pass a connection class to do_open, but it doesn't actually check for
+            a class, and just expects a callable. As long as we behave just as a
+            constructor would have, we should be OK. If it ever changes so that
+            we *must* pass a class, we'll create an UnsafeHTTPSConnection class
+            which just sets check_domain to False in the class definition, and
+            choose which one to pass to do_open.
+            """
+            result = HTTPSConnection(*args, **kwargs)
+            if self.ca_certs:
+                result.ca_certs = self.ca_certs
+                result.check_domain = self.check_domain
+            return result
+
+        def https_open(self, req):
+            try:
+                return self.do_open(self._conn_maker, req)
+            except URLError as e:
+                if 'certificate verify failed' in str(e.reason):
+                    raise CertificateError('Unable to verify server certificate '
+                                           'for %s' % req.host)
+                else:
+                    raise
+
+    #
+    # To prevent against mixing HTTP traffic with HTTPS (examples: A Man-In-The-
+    # Middle proxy using HTTP listens on port 443, or an index mistakenly serves
+    # HTML containing a http://xyz link when it should be https://xyz),
+    # you can use the following handler class, which does not allow HTTP traffic.
+    #
+    # It works by inheriting from HTTPHandler - so build_opener won't add a
+    # handler for HTTP itself.
+    #
+    class HTTPSOnlyHandler(HTTPSHandler, HTTPHandler):
+        def http_open(self, req):
+            raise URLError('Unexpected HTTP request on what should be a secure '
+                           'connection: %s' % req)
+
+#
+# XML-RPC with timeouts
+#
+
+_ver_info = sys.version_info[:2]
+
+if _ver_info == (2, 6):
+    class HTTP(httplib.HTTP):
+        def __init__(self, host='', port=None, **kwargs):
+            if port == 0:   # 0 means use port 0, not the default port
+                port = None
+            self._setup(self._connection_class(host, port, **kwargs))
+
+
+    if ssl:
+        class HTTPS(httplib.HTTPS):
+            def __init__(self, host='', port=None, **kwargs):
+                if port == 0:   # 0 means use port 0, not the default port
+                    port = None
+                self._setup(self._connection_class(host, port, **kwargs))
+
+
+class Transport(xmlrpclib.Transport):
+    def __init__(self, timeout, use_datetime=0):
+        self.timeout = timeout
+        xmlrpclib.Transport.__init__(self, use_datetime)
+
+    def make_connection(self, host):
+        h, eh, x509 = self.get_host_info(host)
+        if _ver_info == (2, 6):
+            result = HTTP(h, timeout=self.timeout)
+        else:
+            if not self._connection or host != self._connection[0]:
+                self._extra_headers = eh
+                self._connection = host, httplib.HTTPConnection(h)
+            result = self._connection[1]
+        return result
+
+if ssl:
+    class SafeTransport(xmlrpclib.SafeTransport):
+        def __init__(self, timeout, use_datetime=0):
+            self.timeout = timeout
+            xmlrpclib.SafeTransport.__init__(self, use_datetime)
+
+        def make_connection(self, host):
+            h, eh, kwargs = self.get_host_info(host)
+            if not kwargs:
+                kwargs = {}
+            kwargs['timeout'] = self.timeout
+            if _ver_info == (2, 6):
+                result = HTTPS(host, None, **kwargs)
+            else:
+                if not self._connection or host != self._connection[0]:
+                    self._extra_headers = eh
+                    self._connection = host, httplib.HTTPSConnection(h, None,
+                                                                     **kwargs)
+                result = self._connection[1]
+            return result
+
+
+class ServerProxy(xmlrpclib.ServerProxy):
+    def __init__(self, uri, **kwargs):
+        self.timeout = timeout = kwargs.pop('timeout', None)
+        # The above classes only come into play if a timeout
+        # is specified
+        if timeout is not None:
+            scheme, _ = splittype(uri)
+            use_datetime = kwargs.get('use_datetime', 0)
+            if scheme == 'https':
+                tcls = SafeTransport
+            else:
+                tcls = Transport
+            kwargs['transport'] = t = tcls(timeout, use_datetime=use_datetime)
+            self.transport = t
+        xmlrpclib.ServerProxy.__init__(self, uri, **kwargs)
+
+#
+# CSV functionality. This is provided because on 2.x, the csv module can't
+# handle Unicode. However, we need to deal with Unicode in e.g. RECORD files.
+#
+
+def _csv_open(fn, mode, **kwargs):
+    if sys.version_info[0] < 3:
+        mode += 'b'
+    else:
+        kwargs['newline'] = ''
+        # Python 3 determines encoding from locale. Force 'utf-8'
+        # file encoding to match other forced utf-8 encoding
+        kwargs['encoding'] = 'utf-8'
+    return open(fn, mode, **kwargs)
+
+
+class CSVBase(object):
+    defaults = {
+        'delimiter': str(','),      # The strs are used because we need native
+        'quotechar': str('"'),      # str in the csv API (2.x won't take
+        'lineterminator': str('\n') # Unicode)
+    }
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *exc_info):
+        self.stream.close()
+
+
+class CSVReader(CSVBase):
+    def __init__(self, **kwargs):
+        if 'stream' in kwargs:
+            stream = kwargs['stream']
+            if sys.version_info[0] >= 3:
+                # needs to be a text stream
+                stream = codecs.getreader('utf-8')(stream)
+            self.stream = stream
+        else:
+            self.stream = _csv_open(kwargs['path'], 'r')
+        self.reader = csv.reader(self.stream, **self.defaults)
+
+    def __iter__(self):
+        return self
+
+    def next(self):
+        result = next(self.reader)
+        if sys.version_info[0] < 3:
+            for i, item in enumerate(result):
+                if not isinstance(item, text_type):
+                    result[i] = item.decode('utf-8')
+        return result
+
+    __next__ = next
+
+class CSVWriter(CSVBase):
+    def __init__(self, fn, **kwargs):
+        self.stream = _csv_open(fn, 'w')
+        self.writer = csv.writer(self.stream, **self.defaults)
+
+    def writerow(self, row):
+        if sys.version_info[0] < 3:
+            r = []
+            for item in row:
+                if isinstance(item, text_type):
+                    item = item.encode('utf-8')
+                r.append(item)
+            row = r
+        self.writer.writerow(row)
+
+#
+#   Configurator functionality
+#
+
+class Configurator(BaseConfigurator):
+
+    value_converters = dict(BaseConfigurator.value_converters)
+    value_converters['inc'] = 'inc_convert'
+
+    def __init__(self, config, base=None):
+        super(Configurator, self).__init__(config)
+        self.base = base or os.getcwd()
+
+    def configure_custom(self, config):
+        def convert(o):
+            if isinstance(o, (list, tuple)):
+                result = type(o)([convert(i) for i in o])
+            elif isinstance(o, dict):
+                if '()' in o:
+                    result = self.configure_custom(o)
+                else:
+                    result = {}
+                    for k in o:
+                        result[k] = convert(o[k])
+            else:
+                result = self.convert(o)
+            return result
+
+        c = config.pop('()')
+        if not callable(c):
+            c = self.resolve(c)
+        props = config.pop('.', None)
+        # Check for valid identifiers
+        args = config.pop('[]', ())
+        if args:
+            args = tuple([convert(o) for o in args])
+        items = [(k, convert(config[k])) for k in config if valid_ident(k)]
+        kwargs = dict(items)
+        result = c(*args, **kwargs)
+        if props:
+            for n, v in props.items():
+                setattr(result, n, convert(v))
+        return result
+
+    def __getitem__(self, key):
+        result = self.config[key]
+        if isinstance(result, dict) and '()' in result:
+            self.config[key] = result = self.configure_custom(result)
+        return result
+
+    def inc_convert(self, value):
+        """Default converter for the inc:// protocol."""
+        if not os.path.isabs(value):
+            value = os.path.join(self.base, value)
+        with codecs.open(value, 'r', encoding='utf-8') as f:
+            result = json.load(f)
+        return result
+
+
+class SubprocessMixin(object):
+    """
+    Mixin for running subprocesses and capturing their output
+    """
+    def __init__(self, verbose=False, progress=None):
+        self.verbose = verbose
+        self.progress = progress
+
+    def reader(self, stream, context):
+        """
+        Read lines from a subprocess' output stream and either pass to a progress
+        callable (if specified) or write progress information to sys.stderr.
+        """
+        progress = self.progress
+        verbose = self.verbose
+        while True:
+            s = stream.readline()
+            if not s:
+                break
+            if progress is not None:
+                progress(s, context)
+            else:
+                if not verbose:
+                    sys.stderr.write('.')
+                else:
+                    sys.stderr.write(s.decode('utf-8'))
+                sys.stderr.flush()
+        stream.close()
+
+    def run_command(self, cmd, **kwargs):
+        p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE, **kwargs)
+        t1 = threading.Thread(target=self.reader, args=(p.stdout, 'stdout'))
+        t1.start()
+        t2 = threading.Thread(target=self.reader, args=(p.stderr, 'stderr'))
+        t2.start()
+        p.wait()
+        t1.join()
+        t2.join()
+        if self.progress is not None:
+            self.progress('done.', 'main')
+        elif self.verbose:
+            sys.stderr.write('done.\n')
+        return p
+
+
+def normalize_name(name):
+    """Normalize a python package name a la PEP 503"""
+    # https://www.python.org/dev/peps/pep-0503/#normalized-names
+    return re.sub('[-_.]+', '-', name).lower()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/version.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/version.py
new file mode 100644
index 0000000..3eebe18
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/version.py
@@ -0,0 +1,736 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2017 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""
+Implementation of a flexible versioning scheme providing support for PEP-440,
+setuptools-compatible and semantic versioning.
+"""
+
+import logging
+import re
+
+from .compat import string_types
+from .util import parse_requirement
+
+__all__ = ['NormalizedVersion', 'NormalizedMatcher',
+           'LegacyVersion', 'LegacyMatcher',
+           'SemanticVersion', 'SemanticMatcher',
+           'UnsupportedVersionError', 'get_scheme']
+
+logger = logging.getLogger(__name__)
+
+
+class UnsupportedVersionError(ValueError):
+    """This is an unsupported version."""
+    pass
+
+
+class Version(object):
+    def __init__(self, s):
+        self._string = s = s.strip()
+        self._parts = parts = self.parse(s)
+        assert isinstance(parts, tuple)
+        assert len(parts) > 0
+
+    def parse(self, s):
+        raise NotImplementedError('please implement in a subclass')
+
+    def _check_compatible(self, other):
+        if type(self) != type(other):
+            raise TypeError('cannot compare %r and %r' % (self, other))
+
+    def __eq__(self, other):
+        self._check_compatible(other)
+        return self._parts == other._parts
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __lt__(self, other):
+        self._check_compatible(other)
+        return self._parts < other._parts
+
+    def __gt__(self, other):
+        return not (self.__lt__(other) or self.__eq__(other))
+
+    def __le__(self, other):
+        return self.__lt__(other) or self.__eq__(other)
+
+    def __ge__(self, other):
+        return self.__gt__(other) or self.__eq__(other)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    def __hash__(self):
+        return hash(self._parts)
+
+    def __repr__(self):
+        return "%s('%s')" % (self.__class__.__name__, self._string)
+
+    def __str__(self):
+        return self._string
+
+    @property
+    def is_prerelease(self):
+        raise NotImplementedError('Please implement in subclasses.')
+
+
+class Matcher(object):
+    version_class = None
+
+    # value is either a callable or the name of a method
+    _operators = {
+        '<': lambda v, c, p: v < c,
+        '>': lambda v, c, p: v > c,
+        '<=': lambda v, c, p: v == c or v < c,
+        '>=': lambda v, c, p: v == c or v > c,
+        '==': lambda v, c, p: v == c,
+        '===': lambda v, c, p: v == c,
+        # by default, compatible => >=.
+        '~=': lambda v, c, p: v == c or v > c,
+        '!=': lambda v, c, p: v != c,
+    }
+
+    # this is a method only to support alternative implementations
+    # via overriding
+    def parse_requirement(self, s):
+        return parse_requirement(s)
+
+    def __init__(self, s):
+        if self.version_class is None:
+            raise ValueError('Please specify a version class')
+        self._string = s = s.strip()
+        r = self.parse_requirement(s)
+        if not r:
+            raise ValueError('Not valid: %r' % s)
+        self.name = r.name
+        self.key = self.name.lower()    # for case-insensitive comparisons
+        clist = []
+        if r.constraints:
+            # import pdb; pdb.set_trace()
+            for op, s in r.constraints:
+                if s.endswith('.*'):
+                    if op not in ('==', '!='):
+                        raise ValueError('\'.*\' not allowed for '
+                                         '%r constraints' % op)
+                    # Could be a partial version (e.g. for '2.*') which
+                    # won't parse as a version, so keep it as a string
+                    vn, prefix = s[:-2], True
+                    # Just to check that vn is a valid version
+                    self.version_class(vn)
+                else:
+                    # Should parse as a version, so we can create an
+                    # instance for the comparison
+                    vn, prefix = self.version_class(s), False
+                clist.append((op, vn, prefix))
+        self._parts = tuple(clist)
+
+    def match(self, version):
+        """
+        Check if the provided version matches the constraints.
+
+        :param version: The version to match against this instance.
+        :type version: String or :class:`Version` instance.
+        """
+        if isinstance(version, string_types):
+            version = self.version_class(version)
+        for operator, constraint, prefix in self._parts:
+            f = self._operators.get(operator)
+            if isinstance(f, string_types):
+                f = getattr(self, f)
+            if not f:
+                msg = ('%r not implemented '
+                       'for %s' % (operator, self.__class__.__name__))
+                raise NotImplementedError(msg)
+            if not f(version, constraint, prefix):
+                return False
+        return True
+
+    @property
+    def exact_version(self):
+        result = None
+        if len(self._parts) == 1 and self._parts[0][0] in ('==', '==='):
+            result = self._parts[0][1]
+        return result
+
+    def _check_compatible(self, other):
+        if type(self) != type(other) or self.name != other.name:
+            raise TypeError('cannot compare %s and %s' % (self, other))
+
+    def __eq__(self, other):
+        self._check_compatible(other)
+        return self.key == other.key and self._parts == other._parts
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    def __hash__(self):
+        return hash(self.key) + hash(self._parts)
+
+    def __repr__(self):
+        return "%s(%r)" % (self.__class__.__name__, self._string)
+
+    def __str__(self):
+        return self._string
+
+
+PEP440_VERSION_RE = re.compile(r'^v?(\d+!)?(\d+(\.\d+)*)((a|b|c|rc)(\d+))?'
+                               r'(\.(post)(\d+))?(\.(dev)(\d+))?'
+                               r'(\+([a-zA-Z\d]+(\.[a-zA-Z\d]+)?))?$')
+
+
+def _pep_440_key(s):
+    s = s.strip()
+    m = PEP440_VERSION_RE.match(s)
+    if not m:
+        raise UnsupportedVersionError('Not a valid version: %s' % s)
+    groups = m.groups()
+    nums = tuple(int(v) for v in groups[1].split('.'))
+    while len(nums) > 1 and nums[-1] == 0:
+        nums = nums[:-1]
+
+    if not groups[0]:
+        epoch = 0
+    else:
+        epoch = int(groups[0])
+    pre = groups[4:6]
+    post = groups[7:9]
+    dev = groups[10:12]
+    local = groups[13]
+    if pre == (None, None):
+        pre = ()
+    else:
+        pre = pre[0], int(pre[1])
+    if post == (None, None):
+        post = ()
+    else:
+        post = post[0], int(post[1])
+    if dev == (None, None):
+        dev = ()
+    else:
+        dev = dev[0], int(dev[1])
+    if local is None:
+        local = ()
+    else:
+        parts = []
+        for part in local.split('.'):
+            # to ensure that numeric compares as > lexicographic, avoid
+            # comparing them directly, but encode a tuple which ensures
+            # correct sorting
+            if part.isdigit():
+                part = (1, int(part))
+            else:
+                part = (0, part)
+            parts.append(part)
+        local = tuple(parts)
+    if not pre:
+        # either before pre-release, or final release and after
+        if not post and dev:
+            # before pre-release
+            pre = ('a', -1)     # to sort before a0
+        else:
+            pre = ('z',)        # to sort after all pre-releases
+    # now look at the state of post and dev.
+    if not post:
+        post = ('_',)   # sort before 'a'
+    if not dev:
+        dev = ('final',)
+
+    #print('%s -> %s' % (s, m.groups()))
+    return epoch, nums, pre, post, dev, local
+
+
+_normalized_key = _pep_440_key
+
+
+class NormalizedVersion(Version):
+    """A rational version.
+
+    Good:
+        1.2         # equivalent to "1.2.0"
+        1.2.0
+        1.2a1
+        1.2.3a2
+        1.2.3b1
+        1.2.3c1
+        1.2.3.4
+        TODO: fill this out
+
+    Bad:
+        1           # minimum two numbers
+        1.2a        # release level must have a release serial
+        1.2.3b
+    """
+    def parse(self, s):
+        result = _normalized_key(s)
+        # _normalized_key loses trailing zeroes in the release
+        # clause, since that's needed to ensure that X.Y == X.Y.0 == X.Y.0.0
+        # However, PEP 440 prefix matching needs it: for example,
+        # (~= 1.4.5.0) matches differently to (~= 1.4.5.0.0).
+        m = PEP440_VERSION_RE.match(s)      # must succeed
+        groups = m.groups()
+        self._release_clause = tuple(int(v) for v in groups[1].split('.'))
+        return result
+
+    PREREL_TAGS = set(['a', 'b', 'c', 'rc', 'dev'])
+
+    @property
+    def is_prerelease(self):
+        return any(t[0] in self.PREREL_TAGS for t in self._parts if t)
+
+
+def _match_prefix(x, y):
+    x = str(x)
+    y = str(y)
+    if x == y:
+        return True
+    if not x.startswith(y):
+        return False
+    n = len(y)
+    return x[n] == '.'
+
+
+class NormalizedMatcher(Matcher):
+    version_class = NormalizedVersion
+
+    # value is either a callable or the name of a method
+    _operators = {
+        '~=': '_match_compatible',
+        '<': '_match_lt',
+        '>': '_match_gt',
+        '<=': '_match_le',
+        '>=': '_match_ge',
+        '==': '_match_eq',
+        '===': '_match_arbitrary',
+        '!=': '_match_ne',
+    }
+
+    def _adjust_local(self, version, constraint, prefix):
+        if prefix:
+            strip_local = '+' not in constraint and version._parts[-1]
+        else:
+            # both constraint and version are
+            # NormalizedVersion instances.
+            # If constraint does not have a local component,
+            # ensure the version doesn't, either.
+            strip_local = not constraint._parts[-1] and version._parts[-1]
+        if strip_local:
+            s = version._string.split('+', 1)[0]
+            version = self.version_class(s)
+        return version, constraint
+
+    def _match_lt(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if version >= constraint:
+            return False
+        release_clause = constraint._release_clause
+        pfx = '.'.join([str(i) for i in release_clause])
+        return not _match_prefix(version, pfx)
+
+    def _match_gt(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if version <= constraint:
+            return False
+        release_clause = constraint._release_clause
+        pfx = '.'.join([str(i) for i in release_clause])
+        return not _match_prefix(version, pfx)
+
+    def _match_le(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        return version <= constraint
+
+    def _match_ge(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        return version >= constraint
+
+    def _match_eq(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if not prefix:
+            result = (version == constraint)
+        else:
+            result = _match_prefix(version, constraint)
+        return result
+
+    def _match_arbitrary(self, version, constraint, prefix):
+        return str(version) == str(constraint)
+
+    def _match_ne(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if not prefix:
+            result = (version != constraint)
+        else:
+            result = not _match_prefix(version, constraint)
+        return result
+
+    def _match_compatible(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if version == constraint:
+            return True
+        if version < constraint:
+            return False
+#        if not prefix:
+#            return True
+        release_clause = constraint._release_clause
+        if len(release_clause) > 1:
+            release_clause = release_clause[:-1]
+        pfx = '.'.join([str(i) for i in release_clause])
+        return _match_prefix(version, pfx)
+
+_REPLACEMENTS = (
+    (re.compile('[.+-]$'), ''),                     # remove trailing puncts
+    (re.compile(r'^[.](\d)'), r'0.\1'),             # .N -> 0.N at start
+    (re.compile('^[.-]'), ''),                      # remove leading puncts
+    (re.compile(r'^\((.*)\)$'), r'\1'),             # remove parentheses
+    (re.compile(r'^v(ersion)?\s*(\d+)'), r'\2'),    # remove leading v(ersion)
+    (re.compile(r'^r(ev)?\s*(\d+)'), r'\2'),        # remove leading v(ersion)
+    (re.compile('[.]{2,}'), '.'),                   # multiple runs of '.'
+    (re.compile(r'\b(alfa|apha)\b'), 'alpha'),      # misspelt alpha
+    (re.compile(r'\b(pre-alpha|prealpha)\b'),
+                'pre.alpha'),                       # standardise
+    (re.compile(r'\(beta\)$'), 'beta'),             # remove parentheses
+)
+
+_SUFFIX_REPLACEMENTS = (
+    (re.compile('^[:~._+-]+'), ''),                   # remove leading puncts
+    (re.compile('[,*")([\\]]'), ''),                  # remove unwanted chars
+    (re.compile('[~:+_ -]'), '.'),                    # replace illegal chars
+    (re.compile('[.]{2,}'), '.'),                   # multiple runs of '.'
+    (re.compile(r'\.$'), ''),                       # trailing '.'
+)
+
+_NUMERIC_PREFIX = re.compile(r'(\d+(\.\d+)*)')
+
+
+def _suggest_semantic_version(s):
+    """
+    Try to suggest a semantic form for a version for which
+    _suggest_normalized_version couldn't come up with anything.
+    """
+    result = s.strip().lower()
+    for pat, repl in _REPLACEMENTS:
+        result = pat.sub(repl, result)
+    if not result:
+        result = '0.0.0'
+
+    # Now look for numeric prefix, and separate it out from
+    # the rest.
+    #import pdb; pdb.set_trace()
+    m = _NUMERIC_PREFIX.match(result)
+    if not m:
+        prefix = '0.0.0'
+        suffix = result
+    else:
+        prefix = m.groups()[0].split('.')
+        prefix = [int(i) for i in prefix]
+        while len(prefix) < 3:
+            prefix.append(0)
+        if len(prefix) == 3:
+            suffix = result[m.end():]
+        else:
+            suffix = '.'.join([str(i) for i in prefix[3:]]) + result[m.end():]
+            prefix = prefix[:3]
+        prefix = '.'.join([str(i) for i in prefix])
+        suffix = suffix.strip()
+    if suffix:
+        #import pdb; pdb.set_trace()
+        # massage the suffix.
+        for pat, repl in _SUFFIX_REPLACEMENTS:
+            suffix = pat.sub(repl, suffix)
+
+    if not suffix:
+        result = prefix
+    else:
+        sep = '-' if 'dev' in suffix else '+'
+        result = prefix + sep + suffix
+    if not is_semver(result):
+        result = None
+    return result
+
+
+def _suggest_normalized_version(s):
+    """Suggest a normalized version close to the given version string.
+
+    If you have a version string that isn't rational (i.e. NormalizedVersion
+    doesn't like it) then you might be able to get an equivalent (or close)
+    rational version from this function.
+
+    This does a number of simple normalizations to the given string, based
+    on observation of versions currently in use on PyPI. Given a dump of
+    those version during PyCon 2009, 4287 of them:
+    - 2312 (53.93%) match NormalizedVersion without change
+      with the automatic suggestion
+    - 3474 (81.04%) match when using this suggestion method
+
+    @param s {str} An irrational version string.
+    @returns A rational version string, or None, if couldn't determine one.
+    """
+    try:
+        _normalized_key(s)
+        return s   # already rational
+    except UnsupportedVersionError:
+        pass
+
+    rs = s.lower()
+
+    # part of this could use maketrans
+    for orig, repl in (('-alpha', 'a'), ('-beta', 'b'), ('alpha', 'a'),
+                       ('beta', 'b'), ('rc', 'c'), ('-final', ''),
+                       ('-pre', 'c'),
+                       ('-release', ''), ('.release', ''), ('-stable', ''),
+                       ('+', '.'), ('_', '.'), (' ', ''), ('.final', ''),
+                       ('final', '')):
+        rs = rs.replace(orig, repl)
+
+    # if something ends with dev or pre, we add a 0
+    rs = re.sub(r"pre$", r"pre0", rs)
+    rs = re.sub(r"dev$", r"dev0", rs)
+
+    # if we have something like "b-2" or "a.2" at the end of the
+    # version, that is probably beta, alpha, etc
+    # let's remove the dash or dot
+    rs = re.sub(r"([abc]|rc)[\-\.](\d+)$", r"\1\2", rs)
+
+    # 1.0-dev-r371 -> 1.0.dev371
+    # 0.1-dev-r79 -> 0.1.dev79
+    rs = re.sub(r"[\-\.](dev)[\-\.]?r?(\d+)$", r".\1\2", rs)
+
+    # Clean: 2.0.a.3, 2.0.b1, 0.9.0~c1
+    rs = re.sub(r"[.~]?([abc])\.?", r"\1", rs)
+
+    # Clean: v0.3, v1.0
+    if rs.startswith('v'):
+        rs = rs[1:]
+
+    # Clean leading '0's on numbers.
+    #TODO: unintended side-effect on, e.g., "2003.05.09"
+    # PyPI stats: 77 (~2%) better
+    rs = re.sub(r"\b0+(\d+)(?!\d)", r"\1", rs)
+
+    # Clean a/b/c with no version. E.g. "1.0a" -> "1.0a0". Setuptools infers
+    # zero.
+    # PyPI stats: 245 (7.56%) better
+    rs = re.sub(r"(\d+[abc])$", r"\g<1>0", rs)
+
+    # the 'dev-rNNN' tag is a dev tag
+    rs = re.sub(r"\.?(dev-r|dev\.r)\.?(\d+)$", r".dev\2", rs)
+
+    # clean the - when used as a pre delimiter
+    rs = re.sub(r"-(a|b|c)(\d+)$", r"\1\2", rs)
+
+    # a terminal "dev" or "devel" can be changed into ".dev0"
+    rs = re.sub(r"[\.\-](dev|devel)$", r".dev0", rs)
+
+    # a terminal "dev" can be changed into ".dev0"
+    rs = re.sub(r"(?![\.\-])dev$", r".dev0", rs)
+
+    # a terminal "final" or "stable" can be removed
+    rs = re.sub(r"(final|stable)$", "", rs)
+
+    # The 'r' and the '-' tags are post release tags
+    #   0.4a1.r10       ->  0.4a1.post10
+    #   0.9.33-17222    ->  0.9.33.post17222
+    #   0.9.33-r17222   ->  0.9.33.post17222
+    rs = re.sub(r"\.?(r|-|-r)\.?(\d+)$", r".post\2", rs)
+
+    # Clean 'r' instead of 'dev' usage:
+    #   0.9.33+r17222   ->  0.9.33.dev17222
+    #   1.0dev123       ->  1.0.dev123
+    #   1.0.git123      ->  1.0.dev123
+    #   1.0.bzr123      ->  1.0.dev123
+    #   0.1a0dev.123    ->  0.1a0.dev123
+    # PyPI stats:  ~150 (~4%) better
+    rs = re.sub(r"\.?(dev|git|bzr)\.?(\d+)$", r".dev\2", rs)
+
+    # Clean '.pre' (normalized from '-pre' above) instead of 'c' usage:
+    #   0.2.pre1        ->  0.2c1
+    #   0.2-c1         ->  0.2c1
+    #   1.0preview123   ->  1.0c123
+    # PyPI stats: ~21 (0.62%) better
+    rs = re.sub(r"\.?(pre|preview|-c)(\d+)$", r"c\g<2>", rs)
+
+    # Tcl/Tk uses "px" for their post release markers
+    rs = re.sub(r"p(\d+)$", r".post\1", rs)
+
+    try:
+        _normalized_key(rs)
+    except UnsupportedVersionError:
+        rs = None
+    return rs
+
+#
+#   Legacy version processing (distribute-compatible)
+#
+
+_VERSION_PART = re.compile(r'([a-z]+|\d+|[\.-])', re.I)
+_VERSION_REPLACE = {
+    'pre': 'c',
+    'preview': 'c',
+    '-': 'final-',
+    'rc': 'c',
+    'dev': '@',
+    '': None,
+    '.': None,
+}
+
+
+def _legacy_key(s):
+    def get_parts(s):
+        result = []
+        for p in _VERSION_PART.split(s.lower()):
+            p = _VERSION_REPLACE.get(p, p)
+            if p:
+                if '0' <= p[:1] <= '9':
+                    p = p.zfill(8)
+                else:
+                    p = '*' + p
+                result.append(p)
+        result.append('*final')
+        return result
+
+    result = []
+    for p in get_parts(s):
+        if p.startswith('*'):
+            if p < '*final':
+                while result and result[-1] == '*final-':
+                    result.pop()
+            while result and result[-1] == '00000000':
+                result.pop()
+        result.append(p)
+    return tuple(result)
+
+
+class LegacyVersion(Version):
+    def parse(self, s):
+        return _legacy_key(s)
+
+    @property
+    def is_prerelease(self):
+        result = False
+        for x in self._parts:
+            if (isinstance(x, string_types) and x.startswith('*') and
+                x < '*final'):
+                result = True
+                break
+        return result
+
+
+class LegacyMatcher(Matcher):
+    version_class = LegacyVersion
+
+    _operators = dict(Matcher._operators)
+    _operators['~='] = '_match_compatible'
+
+    numeric_re = re.compile(r'^(\d+(\.\d+)*)')
+
+    def _match_compatible(self, version, constraint, prefix):
+        if version < constraint:
+            return False
+        m = self.numeric_re.match(str(constraint))
+        if not m:
+            logger.warning('Cannot compute compatible match for version %s '
+                           ' and constraint %s', version, constraint)
+            return True
+        s = m.groups()[0]
+        if '.' in s:
+            s = s.rsplit('.', 1)[0]
+        return _match_prefix(version, s)
+
+#
+#   Semantic versioning
+#
+
+_SEMVER_RE = re.compile(r'^(\d+)\.(\d+)\.(\d+)'
+                        r'(-[a-z0-9]+(\.[a-z0-9-]+)*)?'
+                        r'(\+[a-z0-9]+(\.[a-z0-9-]+)*)?$', re.I)
+
+
+def is_semver(s):
+    return _SEMVER_RE.match(s)
+
+
+def _semantic_key(s):
+    def make_tuple(s, absent):
+        if s is None:
+            result = (absent,)
+        else:
+            parts = s[1:].split('.')
+            # We can't compare ints and strings on Python 3, so fudge it
+            # by zero-filling numeric values so simulate a numeric comparison
+            result = tuple([p.zfill(8) if p.isdigit() else p for p in parts])
+        return result
+
+    m = is_semver(s)
+    if not m:
+        raise UnsupportedVersionError(s)
+    groups = m.groups()
+    major, minor, patch = [int(i) for i in groups[:3]]
+    # choose the '|' and '*' so that versions sort correctly
+    pre, build = make_tuple(groups[3], '|'), make_tuple(groups[5], '*')
+    return (major, minor, patch), pre, build
+
+
+class SemanticVersion(Version):
+    def parse(self, s):
+        return _semantic_key(s)
+
+    @property
+    def is_prerelease(self):
+        return self._parts[1][0] != '|'
+
+
+class SemanticMatcher(Matcher):
+    version_class = SemanticVersion
+
+
+class VersionScheme(object):
+    def __init__(self, key, matcher, suggester=None):
+        self.key = key
+        self.matcher = matcher
+        self.suggester = suggester
+
+    def is_valid_version(self, s):
+        try:
+            self.matcher.version_class(s)
+            result = True
+        except UnsupportedVersionError:
+            result = False
+        return result
+
+    def is_valid_matcher(self, s):
+        try:
+            self.matcher(s)
+            result = True
+        except UnsupportedVersionError:
+            result = False
+        return result
+
+    def is_valid_constraint_list(self, s):
+        """
+        Used for processing some metadata fields
+        """
+        return self.is_valid_matcher('dummy_name (%s)' % s)
+
+    def suggest(self, s):
+        if self.suggester is None:
+            result = None
+        else:
+            result = self.suggester(s)
+        return result
+
+_SCHEMES = {
+    'normalized': VersionScheme(_normalized_key, NormalizedMatcher,
+                                _suggest_normalized_version),
+    'legacy': VersionScheme(_legacy_key, LegacyMatcher, lambda self, s: s),
+    'semantic': VersionScheme(_semantic_key, SemanticMatcher,
+                              _suggest_semantic_version),
+}
+
+_SCHEMES['default'] = _SCHEMES['normalized']
+
+
+def get_scheme(name):
+    if name not in _SCHEMES:
+        raise ValueError('unknown scheme name: %r' % name)
+    return _SCHEMES[name]
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/w32.exe b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/w32.exe
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/w64.exe b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/w64.exe
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/wheel.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/wheel.py
new file mode 100644
index 0000000..1e2c7a0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distlib/wheel.py
@@ -0,0 +1,1018 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from __future__ import unicode_literals
+
+import base64
+import codecs
+import datetime
+import distutils.util
+from email import message_from_file
+import hashlib
+import imp
+import json
+import logging
+import os
+import posixpath
+import re
+import shutil
+import sys
+import tempfile
+import zipfile
+
+from . import __version__, DistlibException
+from .compat import sysconfig, ZipFile, fsdecode, text_type, filter
+from .database import InstalledDistribution
+from .metadata import (Metadata, METADATA_FILENAME, WHEEL_METADATA_FILENAME,
+                       LEGACY_METADATA_FILENAME)
+from .util import (FileOperator, convert_path, CSVReader, CSVWriter, Cache,
+                   cached_property, get_cache_base, read_exports, tempdir)
+from .version import NormalizedVersion, UnsupportedVersionError
+
+logger = logging.getLogger(__name__)
+
+cache = None    # created when needed
+
+if hasattr(sys, 'pypy_version_info'):  # pragma: no cover
+    IMP_PREFIX = 'pp'
+elif sys.platform.startswith('java'):  # pragma: no cover
+    IMP_PREFIX = 'jy'
+elif sys.platform == 'cli':  # pragma: no cover
+    IMP_PREFIX = 'ip'
+else:
+    IMP_PREFIX = 'cp'
+
+VER_SUFFIX = sysconfig.get_config_var('py_version_nodot')
+if not VER_SUFFIX:   # pragma: no cover
+    VER_SUFFIX = '%s%s' % sys.version_info[:2]
+PYVER = 'py' + VER_SUFFIX
+IMPVER = IMP_PREFIX + VER_SUFFIX
+
+ARCH = distutils.util.get_platform().replace('-', '_').replace('.', '_')
+
+ABI = sysconfig.get_config_var('SOABI')
+if ABI and ABI.startswith('cpython-'):
+    ABI = ABI.replace('cpython-', 'cp')
+else:
+    def _derive_abi():
+        parts = ['cp', VER_SUFFIX]
+        if sysconfig.get_config_var('Py_DEBUG'):
+            parts.append('d')
+        if sysconfig.get_config_var('WITH_PYMALLOC'):
+            parts.append('m')
+        if sysconfig.get_config_var('Py_UNICODE_SIZE') == 4:
+            parts.append('u')
+        return ''.join(parts)
+    ABI = _derive_abi()
+    del _derive_abi
+
+FILENAME_RE = re.compile(r'''
+(?P<nm>[^-]+)
+-(?P<vn>\d+[^-]*)
+(-(?P<bn>\d+[^-]*))?
+-(?P<py>\w+\d+(\.\w+\d+)*)
+-(?P<bi>\w+)
+-(?P<ar>\w+(\.\w+)*)
+\.whl$
+''', re.IGNORECASE | re.VERBOSE)
+
+NAME_VERSION_RE = re.compile(r'''
+(?P<nm>[^-]+)
+-(?P<vn>\d+[^-]*)
+(-(?P<bn>\d+[^-]*))?$
+''', re.IGNORECASE | re.VERBOSE)
+
+SHEBANG_RE = re.compile(br'\s*#![^\r\n]*')
+SHEBANG_DETAIL_RE = re.compile(br'^(\s*#!("[^"]+"|\S+))\s+(.*)$')
+SHEBANG_PYTHON = b'#!python'
+SHEBANG_PYTHONW = b'#!pythonw'
+
+if os.sep == '/':
+    to_posix = lambda o: o
+else:
+    to_posix = lambda o: o.replace(os.sep, '/')
+
+
+class Mounter(object):
+    def __init__(self):
+        self.impure_wheels = {}
+        self.libs = {}
+
+    def add(self, pathname, extensions):
+        self.impure_wheels[pathname] = extensions
+        self.libs.update(extensions)
+
+    def remove(self, pathname):
+        extensions = self.impure_wheels.pop(pathname)
+        for k, v in extensions:
+            if k in self.libs:
+                del self.libs[k]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.libs:
+            result = self
+        else:
+            result = None
+        return result
+
+    def load_module(self, fullname):
+        if fullname in sys.modules:
+            result = sys.modules[fullname]
+        else:
+            if fullname not in self.libs:
+                raise ImportError('unable to find extension for %s' % fullname)
+            result = imp.load_dynamic(fullname, self.libs[fullname])
+            result.__loader__ = self
+            parts = fullname.rsplit('.', 1)
+            if len(parts) > 1:
+                result.__package__ = parts[0]
+        return result
+
+_hook = Mounter()
+
+
+class Wheel(object):
+    """
+    Class to build and install from Wheel files (PEP 427).
+    """
+
+    wheel_version = (1, 1)
+    hash_kind = 'sha256'
+
+    def __init__(self, filename=None, sign=False, verify=False):
+        """
+        Initialise an instance using a (valid) filename.
+        """
+        self.sign = sign
+        self.should_verify = verify
+        self.buildver = ''
+        self.pyver = [PYVER]
+        self.abi = ['none']
+        self.arch = ['any']
+        self.dirname = os.getcwd()
+        if filename is None:
+            self.name = 'dummy'
+            self.version = '0.1'
+            self._filename = self.filename
+        else:
+            m = NAME_VERSION_RE.match(filename)
+            if m:
+                info = m.groupdict('')
+                self.name = info['nm']
+                # Reinstate the local version separator
+                self.version = info['vn'].replace('_', '-')
+                self.buildver = info['bn']
+                self._filename = self.filename
+            else:
+                dirname, filename = os.path.split(filename)
+                m = FILENAME_RE.match(filename)
+                if not m:
+                    raise DistlibException('Invalid name or '
+                                           'filename: %r' % filename)
+                if dirname:
+                    self.dirname = os.path.abspath(dirname)
+                self._filename = filename
+                info = m.groupdict('')
+                self.name = info['nm']
+                self.version = info['vn']
+                self.buildver = info['bn']
+                self.pyver = info['py'].split('.')
+                self.abi = info['bi'].split('.')
+                self.arch = info['ar'].split('.')
+
+    @property
+    def filename(self):
+        """
+        Build and return a filename from the various components.
+        """
+        if self.buildver:
+            buildver = '-' + self.buildver
+        else:
+            buildver = ''
+        pyver = '.'.join(self.pyver)
+        abi = '.'.join(self.abi)
+        arch = '.'.join(self.arch)
+        # replace - with _ as a local version separator
+        version = self.version.replace('-', '_')
+        return '%s-%s%s-%s-%s-%s.whl' % (self.name, version, buildver,
+                                         pyver, abi, arch)
+
+    @property
+    def exists(self):
+        path = os.path.join(self.dirname, self.filename)
+        return os.path.isfile(path)
+
+    @property
+    def tags(self):
+        for pyver in self.pyver:
+            for abi in self.abi:
+                for arch in self.arch:
+                    yield pyver, abi, arch
+
+    @cached_property
+    def metadata(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        wrapper = codecs.getreader('utf-8')
+        with ZipFile(pathname, 'r') as zf:
+            wheel_metadata = self.get_wheel_metadata(zf)
+            wv = wheel_metadata['Wheel-Version'].split('.', 1)
+            file_version = tuple([int(i) for i in wv])
+            # if file_version < (1, 1):
+                # fns = [WHEEL_METADATA_FILENAME, METADATA_FILENAME,
+                       # LEGACY_METADATA_FILENAME]
+            # else:
+                # fns = [WHEEL_METADATA_FILENAME, METADATA_FILENAME]
+            fns = [WHEEL_METADATA_FILENAME, LEGACY_METADATA_FILENAME]
+            result = None
+            for fn in fns:
+                try:
+                    metadata_filename = posixpath.join(info_dir, fn)
+                    with zf.open(metadata_filename) as bf:
+                        wf = wrapper(bf)
+                        result = Metadata(fileobj=wf)
+                        if result:
+                            break
+                except KeyError:
+                    pass
+            if not result:
+                raise ValueError('Invalid wheel, because metadata is '
+                                 'missing: looked in %s' % ', '.join(fns))
+        return result
+
+    def get_wheel_metadata(self, zf):
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        metadata_filename = posixpath.join(info_dir, 'WHEEL')
+        with zf.open(metadata_filename) as bf:
+            wf = codecs.getreader('utf-8')(bf)
+            message = message_from_file(wf)
+        return dict(message)
+
+    @cached_property
+    def info(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        with ZipFile(pathname, 'r') as zf:
+            result = self.get_wheel_metadata(zf)
+        return result
+
+    def process_shebang(self, data):
+        m = SHEBANG_RE.match(data)
+        if m:
+            end = m.end()
+            shebang, data_after_shebang = data[:end], data[end:]
+            # Preserve any arguments after the interpreter
+            if b'pythonw' in shebang.lower():
+                shebang_python = SHEBANG_PYTHONW
+            else:
+                shebang_python = SHEBANG_PYTHON
+            m = SHEBANG_DETAIL_RE.match(shebang)
+            if m:
+                args = b' ' + m.groups()[-1]
+            else:
+                args = b''
+            shebang = shebang_python + args
+            data = shebang + data_after_shebang
+        else:
+            cr = data.find(b'\r')
+            lf = data.find(b'\n')
+            if cr < 0 or cr > lf:
+                term = b'\n'
+            else:
+                if data[cr:cr + 2] == b'\r\n':
+                    term = b'\r\n'
+                else:
+                    term = b'\r'
+            data = SHEBANG_PYTHON + term + data
+        return data
+
+    def get_hash(self, data, hash_kind=None):
+        if hash_kind is None:
+            hash_kind = self.hash_kind
+        try:
+            hasher = getattr(hashlib, hash_kind)
+        except AttributeError:
+            raise DistlibException('Unsupported hash algorithm: %r' % hash_kind)
+        result = hasher(data).digest()
+        result = base64.urlsafe_b64encode(result).rstrip(b'=').decode('ascii')
+        return hash_kind, result
+
+    def write_record(self, records, record_path, base):
+        records = list(records) # make a copy, as mutated
+        p = to_posix(os.path.relpath(record_path, base))
+        records.append((p, '', ''))
+        with CSVWriter(record_path) as writer:
+            for row in records:
+                writer.writerow(row)
+
+    def write_records(self, info, libdir, archive_paths):
+        records = []
+        distinfo, info_dir = info
+        hasher = getattr(hashlib, self.hash_kind)
+        for ap, p in archive_paths:
+            with open(p, 'rb') as f:
+                data = f.read()
+            digest = '%s=%s' % self.get_hash(data)
+            size = os.path.getsize(p)
+            records.append((ap, digest, size))
+
+        p = os.path.join(distinfo, 'RECORD')
+        self.write_record(records, p, libdir)
+        ap = to_posix(os.path.join(info_dir, 'RECORD'))
+        archive_paths.append((ap, p))
+
+    def build_zip(self, pathname, archive_paths):
+        with ZipFile(pathname, 'w', zipfile.ZIP_DEFLATED) as zf:
+            for ap, p in archive_paths:
+                logger.debug('Wrote %s to %s in wheel', p, ap)
+                zf.write(p, ap)
+
+    def build(self, paths, tags=None, wheel_version=None):
+        """
+        Build a wheel from files in specified paths, and use any specified tags
+        when determining the name of the wheel.
+        """
+        if tags is None:
+            tags = {}
+
+        libkey = list(filter(lambda o: o in paths, ('purelib', 'platlib')))[0]
+        if libkey == 'platlib':
+            is_pure = 'false'
+            default_pyver = [IMPVER]
+            default_abi = [ABI]
+            default_arch = [ARCH]
+        else:
+            is_pure = 'true'
+            default_pyver = [PYVER]
+            default_abi = ['none']
+            default_arch = ['any']
+
+        self.pyver = tags.get('pyver', default_pyver)
+        self.abi = tags.get('abi', default_abi)
+        self.arch = tags.get('arch', default_arch)
+
+        libdir = paths[libkey]
+
+        name_ver = '%s-%s' % (self.name, self.version)
+        data_dir = '%s.data' % name_ver
+        info_dir = '%s.dist-info' % name_ver
+
+        archive_paths = []
+
+        # First, stuff which is not in site-packages
+        for key in ('data', 'headers', 'scripts'):
+            if key not in paths:
+                continue
+            path = paths[key]
+            if os.path.isdir(path):
+                for root, dirs, files in os.walk(path):
+                    for fn in files:
+                        p = fsdecode(os.path.join(root, fn))
+                        rp = os.path.relpath(p, path)
+                        ap = to_posix(os.path.join(data_dir, key, rp))
+                        archive_paths.append((ap, p))
+                        if key == 'scripts' and not p.endswith('.exe'):
+                            with open(p, 'rb') as f:
+                                data = f.read()
+                            data = self.process_shebang(data)
+                            with open(p, 'wb') as f:
+                                f.write(data)
+
+        # Now, stuff which is in site-packages, other than the
+        # distinfo stuff.
+        path = libdir
+        distinfo = None
+        for root, dirs, files in os.walk(path):
+            if root == path:
+                # At the top level only, save distinfo for later
+                # and skip it for now
+                for i, dn in enumerate(dirs):
+                    dn = fsdecode(dn)
+                    if dn.endswith('.dist-info'):
+                        distinfo = os.path.join(root, dn)
+                        del dirs[i]
+                        break
+                assert distinfo, '.dist-info directory expected, not found'
+
+            for fn in files:
+                # comment out next suite to leave .pyc files in
+                if fsdecode(fn).endswith(('.pyc', '.pyo')):
+                    continue
+                p = os.path.join(root, fn)
+                rp = to_posix(os.path.relpath(p, path))
+                archive_paths.append((rp, p))
+
+        # Now distinfo. Assumed to be flat, i.e. os.listdir is enough.
+        files = os.listdir(distinfo)
+        for fn in files:
+            if fn not in ('RECORD', 'INSTALLER', 'SHARED', 'WHEEL'):
+                p = fsdecode(os.path.join(distinfo, fn))
+                ap = to_posix(os.path.join(info_dir, fn))
+                archive_paths.append((ap, p))
+
+        wheel_metadata = [
+            'Wheel-Version: %d.%d' % (wheel_version or self.wheel_version),
+            'Generator: distlib %s' % __version__,
+            'Root-Is-Purelib: %s' % is_pure,
+        ]
+        for pyver, abi, arch in self.tags:
+            wheel_metadata.append('Tag: %s-%s-%s' % (pyver, abi, arch))
+        p = os.path.join(distinfo, 'WHEEL')
+        with open(p, 'w') as f:
+            f.write('\n'.join(wheel_metadata))
+        ap = to_posix(os.path.join(info_dir, 'WHEEL'))
+        archive_paths.append((ap, p))
+
+        # sort the entries by archive path. Not needed by any spec, but it
+        # keeps the archive listing and RECORD tidier than they would otherwise
+        # be. Use the number of path segments to keep directory entries together,
+        # and keep the dist-info stuff at the end.
+        def sorter(t):
+            ap = t[0]
+            n = ap.count('/')
+            if '.dist-info' in ap:
+                n += 10000
+            return (n, ap)
+        archive_paths = sorted(archive_paths, key=sorter)
+
+        # Now, at last, RECORD.
+        # Paths in here are archive paths - nothing else makes sense.
+        self.write_records((distinfo, info_dir), libdir, archive_paths)
+        # Now, ready to build the zip file
+        pathname = os.path.join(self.dirname, self.filename)
+        self.build_zip(pathname, archive_paths)
+        return pathname
+
+    def skip_entry(self, arcname):
+        """
+        Determine whether an archive entry should be skipped when verifying
+        or installing.
+        """
+        # The signature file won't be in RECORD,
+        # and we  don't currently don't do anything with it
+        # We also skip directories, as they won't be in RECORD
+        # either. See:
+        #
+        # https://github.com/pypa/wheel/issues/294
+        # https://github.com/pypa/wheel/issues/287
+        # https://github.com/pypa/wheel/pull/289
+        #
+        return arcname.endswith(('/', '/RECORD.jws'))
+
+    def install(self, paths, maker, **kwargs):
+        """
+        Install a wheel to the specified paths. If kwarg ``warner`` is
+        specified, it should be a callable, which will be called with two
+        tuples indicating the wheel version of this software and the wheel
+        version in the file, if there is a discrepancy in the versions.
+        This can be used to issue any warnings to raise any exceptions.
+        If kwarg ``lib_only`` is True, only the purelib/platlib files are
+        installed, and the headers, scripts, data and dist-info metadata are
+        not written. If kwarg ``bytecode_hashed_invalidation`` is True, written
+        bytecode will try to use file-hash based invalidation (PEP-552) on
+        supported interpreter versions (CPython 2.7+).
+
+        The return value is a :class:`InstalledDistribution` instance unless
+        ``options.lib_only`` is True, in which case the return value is ``None``.
+        """
+
+        dry_run = maker.dry_run
+        warner = kwargs.get('warner')
+        lib_only = kwargs.get('lib_only', False)
+        bc_hashed_invalidation = kwargs.get('bytecode_hashed_invalidation', False)
+
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        data_dir = '%s.data' % name_ver
+        info_dir = '%s.dist-info' % name_ver
+
+        metadata_name = posixpath.join(info_dir, LEGACY_METADATA_FILENAME)
+        wheel_metadata_name = posixpath.join(info_dir, 'WHEEL')
+        record_name = posixpath.join(info_dir, 'RECORD')
+
+        wrapper = codecs.getreader('utf-8')
+
+        with ZipFile(pathname, 'r') as zf:
+            with zf.open(wheel_metadata_name) as bwf:
+                wf = wrapper(bwf)
+                message = message_from_file(wf)
+            wv = message['Wheel-Version'].split('.', 1)
+            file_version = tuple([int(i) for i in wv])
+            if (file_version != self.wheel_version) and warner:
+                warner(self.wheel_version, file_version)
+
+            if message['Root-Is-Purelib'] == 'true':
+                libdir = paths['purelib']
+            else:
+                libdir = paths['platlib']
+
+            records = {}
+            with zf.open(record_name) as bf:
+                with CSVReader(stream=bf) as reader:
+                    for row in reader:
+                        p = row[0]
+                        records[p] = row
+
+            data_pfx = posixpath.join(data_dir, '')
+            info_pfx = posixpath.join(info_dir, '')
+            script_pfx = posixpath.join(data_dir, 'scripts', '')
+
+            # make a new instance rather than a copy of maker's,
+            # as we mutate it
+            fileop = FileOperator(dry_run=dry_run)
+            fileop.record = True    # so we can rollback if needed
+
+            bc = not sys.dont_write_bytecode    # Double negatives. Lovely!
+
+            outfiles = []   # for RECORD writing
+
+            # for script copying/shebang processing
+            workdir = tempfile.mkdtemp()
+            # set target dir later
+            # we default add_launchers to False, as the
+            # Python Launcher should be used instead
+            maker.source_dir = workdir
+            maker.target_dir = None
+            try:
+                for zinfo in zf.infolist():
+                    arcname = zinfo.filename
+                    if isinstance(arcname, text_type):
+                        u_arcname = arcname
+                    else:
+                        u_arcname = arcname.decode('utf-8')
+                    if self.skip_entry(u_arcname):
+                        continue
+                    row = records[u_arcname]
+                    if row[2] and str(zinfo.file_size) != row[2]:
+                        raise DistlibException('size mismatch for '
+                                               '%s' % u_arcname)
+                    if row[1]:
+                        kind, value = row[1].split('=', 1)
+                        with zf.open(arcname) as bf:
+                            data = bf.read()
+                        _, digest = self.get_hash(data, kind)
+                        if digest != value:
+                            raise DistlibException('digest mismatch for '
+                                                   '%s' % arcname)
+
+                    if lib_only and u_arcname.startswith((info_pfx, data_pfx)):
+                        logger.debug('lib_only: skipping %s', u_arcname)
+                        continue
+                    is_script = (u_arcname.startswith(script_pfx)
+                                 and not u_arcname.endswith('.exe'))
+
+                    if u_arcname.startswith(data_pfx):
+                        _, where, rp = u_arcname.split('/', 2)
+                        outfile = os.path.join(paths[where], convert_path(rp))
+                    else:
+                        # meant for site-packages.
+                        if u_arcname in (wheel_metadata_name, record_name):
+                            continue
+                        outfile = os.path.join(libdir, convert_path(u_arcname))
+                    if not is_script:
+                        with zf.open(arcname) as bf:
+                            fileop.copy_stream(bf, outfile)
+                        outfiles.append(outfile)
+                        # Double check the digest of the written file
+                        if not dry_run and row[1]:
+                            with open(outfile, 'rb') as bf:
+                                data = bf.read()
+                                _, newdigest = self.get_hash(data, kind)
+                                if newdigest != digest:
+                                    raise DistlibException('digest mismatch '
+                                                           'on write for '
+                                                           '%s' % outfile)
+                        if bc and outfile.endswith('.py'):
+                            try:
+                                pyc = fileop.byte_compile(outfile,
+                                                          hashed_invalidation=bc_hashed_invalidation)
+                                outfiles.append(pyc)
+                            except Exception:
+                                # Don't give up if byte-compilation fails,
+                                # but log it and perhaps warn the user
+                                logger.warning('Byte-compilation failed',
+                                               exc_info=True)
+                    else:
+                        fn = os.path.basename(convert_path(arcname))
+                        workname = os.path.join(workdir, fn)
+                        with zf.open(arcname) as bf:
+                            fileop.copy_stream(bf, workname)
+
+                        dn, fn = os.path.split(outfile)
+                        maker.target_dir = dn
+                        filenames = maker.make(fn)
+                        fileop.set_executable_mode(filenames)
+                        outfiles.extend(filenames)
+
+                if lib_only:
+                    logger.debug('lib_only: returning None')
+                    dist = None
+                else:
+                    # Generate scripts
+
+                    # Try to get pydist.json so we can see if there are
+                    # any commands to generate. If this fails (e.g. because
+                    # of a legacy wheel), log a warning but don't give up.
+                    commands = None
+                    file_version = self.info['Wheel-Version']
+                    if file_version == '1.0':
+                        # Use legacy info
+                        ep = posixpath.join(info_dir, 'entry_points.txt')
+                        try:
+                            with zf.open(ep) as bwf:
+                                epdata = read_exports(bwf)
+                            commands = {}
+                            for key in ('console', 'gui'):
+                                k = '%s_scripts' % key
+                                if k in epdata:
+                                    commands['wrap_%s' % key] = d = {}
+                                    for v in epdata[k].values():
+                                        s = '%s:%s' % (v.prefix, v.suffix)
+                                        if v.flags:
+                                            s += ' [%s]' % ','.join(v.flags)
+                                        d[v.name] = s
+                        except Exception:
+                            logger.warning('Unable to read legacy script '
+                                           'metadata, so cannot generate '
+                                           'scripts')
+                    else:
+                        try:
+                            with zf.open(metadata_name) as bwf:
+                                wf = wrapper(bwf)
+                                commands = json.load(wf).get('extensions')
+                                if commands:
+                                    commands = commands.get('python.commands')
+                        except Exception:
+                            logger.warning('Unable to read JSON metadata, so '
+                                           'cannot generate scripts')
+                    if commands:
+                        console_scripts = commands.get('wrap_console', {})
+                        gui_scripts = commands.get('wrap_gui', {})
+                        if console_scripts or gui_scripts:
+                            script_dir = paths.get('scripts', '')
+                            if not os.path.isdir(script_dir):
+                                raise ValueError('Valid script path not '
+                                                 'specified')
+                            maker.target_dir = script_dir
+                            for k, v in console_scripts.items():
+                                script = '%s = %s' % (k, v)
+                                filenames = maker.make(script)
+                                fileop.set_executable_mode(filenames)
+
+                            if gui_scripts:
+                                options = {'gui': True }
+                                for k, v in gui_scripts.items():
+                                    script = '%s = %s' % (k, v)
+                                    filenames = maker.make(script, options)
+                                    fileop.set_executable_mode(filenames)
+
+                    p = os.path.join(libdir, info_dir)
+                    dist = InstalledDistribution(p)
+
+                    # Write SHARED
+                    paths = dict(paths)     # don't change passed in dict
+                    del paths['purelib']
+                    del paths['platlib']
+                    paths['lib'] = libdir
+                    p = dist.write_shared_locations(paths, dry_run)
+                    if p:
+                        outfiles.append(p)
+
+                    # Write RECORD
+                    dist.write_installed_files(outfiles, paths['prefix'],
+                                               dry_run)
+                return dist
+            except Exception:  # pragma: no cover
+                logger.exception('installation failed.')
+                fileop.rollback()
+                raise
+            finally:
+                shutil.rmtree(workdir)
+
+    def _get_dylib_cache(self):
+        global cache
+        if cache is None:
+            # Use native string to avoid issues on 2.x: see Python #20140.
+            base = os.path.join(get_cache_base(), str('dylib-cache'),
+                                '%s.%s' % sys.version_info[:2])
+            cache = Cache(base)
+        return cache
+
+    def _get_extensions(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        arcname = posixpath.join(info_dir, 'EXTENSIONS')
+        wrapper = codecs.getreader('utf-8')
+        result = []
+        with ZipFile(pathname, 'r') as zf:
+            try:
+                with zf.open(arcname) as bf:
+                    wf = wrapper(bf)
+                    extensions = json.load(wf)
+                    cache = self._get_dylib_cache()
+                    prefix = cache.prefix_to_dir(pathname)
+                    cache_base = os.path.join(cache.base, prefix)
+                    if not os.path.isdir(cache_base):
+                        os.makedirs(cache_base)
+                    for name, relpath in extensions.items():
+                        dest = os.path.join(cache_base, convert_path(relpath))
+                        if not os.path.exists(dest):
+                            extract = True
+                        else:
+                            file_time = os.stat(dest).st_mtime
+                            file_time = datetime.datetime.fromtimestamp(file_time)
+                            info = zf.getinfo(relpath)
+                            wheel_time = datetime.datetime(*info.date_time)
+                            extract = wheel_time > file_time
+                        if extract:
+                            zf.extract(relpath, cache_base)
+                        result.append((name, dest))
+            except KeyError:
+                pass
+        return result
+
+    def is_compatible(self):
+        """
+        Determine if a wheel is compatible with the running system.
+        """
+        return is_compatible(self)
+
+    def is_mountable(self):
+        """
+        Determine if a wheel is asserted as mountable by its metadata.
+        """
+        return True # for now - metadata details TBD
+
+    def mount(self, append=False):
+        pathname = os.path.abspath(os.path.join(self.dirname, self.filename))
+        if not self.is_compatible():
+            msg = 'Wheel %s not compatible with this Python.' % pathname
+            raise DistlibException(msg)
+        if not self.is_mountable():
+            msg = 'Wheel %s is marked as not mountable.' % pathname
+            raise DistlibException(msg)
+        if pathname in sys.path:
+            logger.debug('%s already in path', pathname)
+        else:
+            if append:
+                sys.path.append(pathname)
+            else:
+                sys.path.insert(0, pathname)
+            extensions = self._get_extensions()
+            if extensions:
+                if _hook not in sys.meta_path:
+                    sys.meta_path.append(_hook)
+                _hook.add(pathname, extensions)
+
+    def unmount(self):
+        pathname = os.path.abspath(os.path.join(self.dirname, self.filename))
+        if pathname not in sys.path:
+            logger.debug('%s not in path', pathname)
+        else:
+            sys.path.remove(pathname)
+            if pathname in _hook.impure_wheels:
+                _hook.remove(pathname)
+            if not _hook.impure_wheels:
+                if _hook in sys.meta_path:
+                    sys.meta_path.remove(_hook)
+
+    def verify(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        data_dir = '%s.data' % name_ver
+        info_dir = '%s.dist-info' % name_ver
+
+        metadata_name = posixpath.join(info_dir, LEGACY_METADATA_FILENAME)
+        wheel_metadata_name = posixpath.join(info_dir, 'WHEEL')
+        record_name = posixpath.join(info_dir, 'RECORD')
+
+        wrapper = codecs.getreader('utf-8')
+
+        with ZipFile(pathname, 'r') as zf:
+            with zf.open(wheel_metadata_name) as bwf:
+                wf = wrapper(bwf)
+                message = message_from_file(wf)
+            wv = message['Wheel-Version'].split('.', 1)
+            file_version = tuple([int(i) for i in wv])
+            # TODO version verification
+
+            records = {}
+            with zf.open(record_name) as bf:
+                with CSVReader(stream=bf) as reader:
+                    for row in reader:
+                        p = row[0]
+                        records[p] = row
+
+            for zinfo in zf.infolist():
+                arcname = zinfo.filename
+                if isinstance(arcname, text_type):
+                    u_arcname = arcname
+                else:
+                    u_arcname = arcname.decode('utf-8')
+                # See issue #115: some wheels have .. in their entries, but
+                # in the filename ... e.g. __main__..py ! So the check is
+                # updated to look for .. in the directory portions
+                p = u_arcname.split('/')
+                if '..' in p:
+                    raise DistlibException('invalid entry in '
+                                           'wheel: %r' % u_arcname)
+
+                if self.skip_entry(u_arcname):
+                    continue
+                row = records[u_arcname]
+                if row[2] and str(zinfo.file_size) != row[2]:
+                    raise DistlibException('size mismatch for '
+                                           '%s' % u_arcname)
+                if row[1]:
+                    kind, value = row[1].split('=', 1)
+                    with zf.open(arcname) as bf:
+                        data = bf.read()
+                    _, digest = self.get_hash(data, kind)
+                    if digest != value:
+                        raise DistlibException('digest mismatch for '
+                                               '%s' % arcname)
+
+    def update(self, modifier, dest_dir=None, **kwargs):
+        """
+        Update the contents of a wheel in a generic way. The modifier should
+        be a callable which expects a dictionary argument: its keys are
+        archive-entry paths, and its values are absolute filesystem paths
+        where the contents the corresponding archive entries can be found. The
+        modifier is free to change the contents of the files pointed to, add
+        new entries and remove entries, before returning. This method will
+        extract the entire contents of the wheel to a temporary location, call
+        the modifier, and then use the passed (and possibly updated)
+        dictionary to write a new wheel. If ``dest_dir`` is specified, the new
+        wheel is written there -- otherwise, the original wheel is overwritten.
+
+        The modifier should return True if it updated the wheel, else False.
+        This method returns the same value the modifier returns.
+        """
+
+        def get_version(path_map, info_dir):
+            version = path = None
+            key = '%s/%s' % (info_dir, LEGACY_METADATA_FILENAME)
+            if key not in path_map:
+                key = '%s/PKG-INFO' % info_dir
+            if key in path_map:
+                path = path_map[key]
+                version = Metadata(path=path).version
+            return version, path
+
+        def update_version(version, path):
+            updated = None
+            try:
+                v = NormalizedVersion(version)
+                i = version.find('-')
+                if i < 0:
+                    updated = '%s+1' % version
+                else:
+                    parts = [int(s) for s in version[i + 1:].split('.')]
+                    parts[-1] += 1
+                    updated = '%s+%s' % (version[:i],
+                                         '.'.join(str(i) for i in parts))
+            except UnsupportedVersionError:
+                logger.debug('Cannot update non-compliant (PEP-440) '
+                             'version %r', version)
+            if updated:
+                md = Metadata(path=path)
+                md.version = updated
+                legacy = path.endswith(LEGACY_METADATA_FILENAME)
+                md.write(path=path, legacy=legacy)
+                logger.debug('Version updated from %r to %r', version,
+                             updated)
+
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        record_name = posixpath.join(info_dir, 'RECORD')
+        with tempdir() as workdir:
+            with ZipFile(pathname, 'r') as zf:
+                path_map = {}
+                for zinfo in zf.infolist():
+                    arcname = zinfo.filename
+                    if isinstance(arcname, text_type):
+                        u_arcname = arcname
+                    else:
+                        u_arcname = arcname.decode('utf-8')
+                    if u_arcname == record_name:
+                        continue
+                    if '..' in u_arcname:
+                        raise DistlibException('invalid entry in '
+                                               'wheel: %r' % u_arcname)
+                    zf.extract(zinfo, workdir)
+                    path = os.path.join(workdir, convert_path(u_arcname))
+                    path_map[u_arcname] = path
+
+            # Remember the version.
+            original_version, _ = get_version(path_map, info_dir)
+            # Files extracted. Call the modifier.
+            modified = modifier(path_map, **kwargs)
+            if modified:
+                # Something changed - need to build a new wheel.
+                current_version, path = get_version(path_map, info_dir)
+                if current_version and (current_version == original_version):
+                    # Add or update local version to signify changes.
+                    update_version(current_version, path)
+                # Decide where the new wheel goes.
+                if dest_dir is None:
+                    fd, newpath = tempfile.mkstemp(suffix='.whl',
+                                                   prefix='wheel-update-',
+                                                   dir=workdir)
+                    os.close(fd)
+                else:
+                    if not os.path.isdir(dest_dir):
+                        raise DistlibException('Not a directory: %r' % dest_dir)
+                    newpath = os.path.join(dest_dir, self.filename)
+                archive_paths = list(path_map.items())
+                distinfo = os.path.join(workdir, info_dir)
+                info = distinfo, info_dir
+                self.write_records(info, workdir, archive_paths)
+                self.build_zip(newpath, archive_paths)
+                if dest_dir is None:
+                    shutil.copyfile(newpath, pathname)
+        return modified
+
+def compatible_tags():
+    """
+    Return (pyver, abi, arch) tuples compatible with this Python.
+    """
+    versions = [VER_SUFFIX]
+    major = VER_SUFFIX[0]
+    for minor in range(sys.version_info[1] - 1, - 1, -1):
+        versions.append(''.join([major, str(minor)]))
+
+    abis = []
+    for suffix, _, _ in imp.get_suffixes():
+        if suffix.startswith('.abi'):
+            abis.append(suffix.split('.', 2)[1])
+    abis.sort()
+    if ABI != 'none':
+        abis.insert(0, ABI)
+    abis.append('none')
+    result = []
+
+    arches = [ARCH]
+    if sys.platform == 'darwin':
+        m = re.match(r'(\w+)_(\d+)_(\d+)_(\w+)$', ARCH)
+        if m:
+            name, major, minor, arch = m.groups()
+            minor = int(minor)
+            matches = [arch]
+            if arch in ('i386', 'ppc'):
+                matches.append('fat')
+            if arch in ('i386', 'ppc', 'x86_64'):
+                matches.append('fat3')
+            if arch in ('ppc64', 'x86_64'):
+                matches.append('fat64')
+            if arch in ('i386', 'x86_64'):
+                matches.append('intel')
+            if arch in ('i386', 'x86_64', 'intel', 'ppc', 'ppc64'):
+                matches.append('universal')
+            while minor >= 0:
+                for match in matches:
+                    s = '%s_%s_%s_%s' % (name, major, minor, match)
+                    if s != ARCH:   # already there
+                        arches.append(s)
+                minor -= 1
+
+    # Most specific - our Python version, ABI and arch
+    for abi in abis:
+        for arch in arches:
+            result.append((''.join((IMP_PREFIX, versions[0])), abi, arch))
+
+    # where no ABI / arch dependency, but IMP_PREFIX dependency
+    for i, version in enumerate(versions):
+        result.append((''.join((IMP_PREFIX, version)), 'none', 'any'))
+        if i == 0:
+            result.append((''.join((IMP_PREFIX, version[0])), 'none', 'any'))
+
+    # no IMP_PREFIX, ABI or arch dependency
+    for i, version in enumerate(versions):
+        result.append((''.join(('py', version)), 'none', 'any'))
+        if i == 0:
+            result.append((''.join(('py', version[0])), 'none', 'any'))
+    return set(result)
+
+
+COMPATIBLE_TAGS = compatible_tags()
+
+del compatible_tags
+
+
+def is_compatible(wheel, tags=None):
+    if not isinstance(wheel, Wheel):
+        wheel = Wheel(wheel)    # assume it's a filename
+    result = False
+    if tags is None:
+        tags = COMPATIBLE_TAGS
+    for ver, abi, arch in tags:
+        if ver in wheel.pyver and abi in wheel.abi and arch in wheel.arch:
+            result = True
+            break
+    return result
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distro.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distro.py
new file mode 100644
index 0000000..0611b62
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/distro.py
@@ -0,0 +1,1230 @@
+# Copyright 2015,2016,2017 Nir Cohen
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+The ``distro`` package (``distro`` stands for Linux Distribution) provides
+information about the Linux distribution it runs on, such as a reliable
+machine-readable distro ID, or version information.
+
+It is the recommended replacement for Python's original
+:py:func:`platform.linux_distribution` function, but it provides much more
+functionality. An alternative implementation became necessary because Python
+3.5 deprecated this function, and Python 3.8 will remove it altogether.
+Its predecessor function :py:func:`platform.dist` was already
+deprecated since Python 2.6 and will also be removed in Python 3.8.
+Still, there are many cases in which access to OS distribution information
+is needed. See `Python issue 1322 <https://bugs.python.org/issue1322>`_ for
+more information.
+"""
+
+import os
+import re
+import sys
+import json
+import shlex
+import logging
+import argparse
+import subprocess
+
+
+_UNIXCONFDIR = os.environ.get('UNIXCONFDIR', '/etc')
+_OS_RELEASE_BASENAME = 'os-release'
+
+#: Translation table for normalizing the "ID" attribute defined in os-release
+#: files, for use by the :func:`distro.id` method.
+#:
+#: * Key: Value as defined in the os-release file, translated to lower case,
+#:   with blanks translated to underscores.
+#:
+#: * Value: Normalized value.
+NORMALIZED_OS_ID = {
+    'ol': 'oracle',  # Oracle Linux
+}
+
+#: Translation table for normalizing the "Distributor ID" attribute returned by
+#: the lsb_release command, for use by the :func:`distro.id` method.
+#:
+#: * Key: Value as returned by the lsb_release command, translated to lower
+#:   case, with blanks translated to underscores.
+#:
+#: * Value: Normalized value.
+NORMALIZED_LSB_ID = {
+    'enterpriseenterpriseas': 'oracle',  # Oracle Enterprise Linux 4
+    'enterpriseenterpriseserver': 'oracle',  # Oracle Linux 5
+    'redhatenterpriseworkstation': 'rhel',  # RHEL 6, 7 Workstation
+    'redhatenterpriseserver': 'rhel',  # RHEL 6, 7 Server
+    'redhatenterprisecomputenode': 'rhel',  # RHEL 6 ComputeNode
+}
+
+#: Translation table for normalizing the distro ID derived from the file name
+#: of distro release files, for use by the :func:`distro.id` method.
+#:
+#: * Key: Value as derived from the file name of a distro release file,
+#:   translated to lower case, with blanks translated to underscores.
+#:
+#: * Value: Normalized value.
+NORMALIZED_DISTRO_ID = {
+    'redhat': 'rhel',  # RHEL 6.x, 7.x
+}
+
+# Pattern for content of distro release file (reversed)
+_DISTRO_RELEASE_CONTENT_REVERSED_PATTERN = re.compile(
+    r'(?:[^)]*\)(.*)\()? *(?:STL )?([\d.+\-a-z]*\d) *(?:esaeler *)?(.+)')
+
+# Pattern for base file name of distro release file
+_DISTRO_RELEASE_BASENAME_PATTERN = re.compile(
+    r'(\w+)[-_](release|version)$')
+
+# Base file names to be ignored when searching for distro release file
+_DISTRO_RELEASE_IGNORE_BASENAMES = (
+    'debian_version',
+    'lsb-release',
+    'oem-release',
+    _OS_RELEASE_BASENAME,
+    'system-release',
+    'plesk-release',
+)
+
+
+def linux_distribution(full_distribution_name=True):
+    """
+    Return information about the current OS distribution as a tuple
+    ``(id_name, version, codename)`` with items as follows:
+
+    * ``id_name``:  If *full_distribution_name* is false, the result of
+      :func:`distro.id`. Otherwise, the result of :func:`distro.name`.
+
+    * ``version``:  The result of :func:`distro.version`.
+
+    * ``codename``:  The result of :func:`distro.codename`.
+
+    The interface of this function is compatible with the original
+    :py:func:`platform.linux_distribution` function, supporting a subset of
+    its parameters.
+
+    The data it returns may not exactly be the same, because it uses more data
+    sources than the original function, and that may lead to different data if
+    the OS distribution is not consistent across multiple data sources it
+    provides (there are indeed such distributions ...).
+
+    Another reason for differences is the fact that the :func:`distro.id`
+    method normalizes the distro ID string to a reliable machine-readable value
+    for a number of popular OS distributions.
+    """
+    return _distro.linux_distribution(full_distribution_name)
+
+
+def id():
+    """
+    Return the distro ID of the current distribution, as a
+    machine-readable string.
+
+    For a number of OS distributions, the returned distro ID value is
+    *reliable*, in the sense that it is documented and that it does not change
+    across releases of the distribution.
+
+    This package maintains the following reliable distro ID values:
+
+    ==============  =========================================
+    Distro ID       Distribution
+    ==============  =========================================
+    "ubuntu"        Ubuntu
+    "debian"        Debian
+    "rhel"          RedHat Enterprise Linux
+    "centos"        CentOS
+    "fedora"        Fedora
+    "sles"          SUSE Linux Enterprise Server
+    "opensuse"      openSUSE
+    "amazon"        Amazon Linux
+    "arch"          Arch Linux
+    "cloudlinux"    CloudLinux OS
+    "exherbo"       Exherbo Linux
+    "gentoo"        GenToo Linux
+    "ibm_powerkvm"  IBM PowerKVM
+    "kvmibm"        KVM for IBM z Systems
+    "linuxmint"     Linux Mint
+    "mageia"        Mageia
+    "mandriva"      Mandriva Linux
+    "parallels"     Parallels
+    "pidora"        Pidora
+    "raspbian"      Raspbian
+    "oracle"        Oracle Linux (and Oracle Enterprise Linux)
+    "scientific"    Scientific Linux
+    "slackware"     Slackware
+    "xenserver"     XenServer
+    "openbsd"       OpenBSD
+    "netbsd"        NetBSD
+    "freebsd"       FreeBSD
+    "midnightbsd"   MidnightBSD
+    ==============  =========================================
+
+    If you have a need to get distros for reliable IDs added into this set,
+    or if you find that the :func:`distro.id` function returns a different
+    distro ID for one of the listed distros, please create an issue in the
+    `distro issue tracker`_.
+
+    **Lookup hierarchy and transformations:**
+
+    First, the ID is obtained from the following sources, in the specified
+    order. The first available and non-empty value is used:
+
+    * the value of the "ID" attribute of the os-release file,
+
+    * the value of the "Distributor ID" attribute returned by the lsb_release
+      command,
+
+    * the first part of the file name of the distro release file,
+
+    The so determined ID value then passes the following transformations,
+    before it is returned by this method:
+
+    * it is translated to lower case,
+
+    * blanks (which should not be there anyway) are translated to underscores,
+
+    * a normalization of the ID is performed, based upon
+      `normalization tables`_. The purpose of this normalization is to ensure
+      that the ID is as reliable as possible, even across incompatible changes
+      in the OS distributions. A common reason for an incompatible change is
+      the addition of an os-release file, or the addition of the lsb_release
+      command, with ID values that differ from what was previously determined
+      from the distro release file name.
+    """
+    return _distro.id()
+
+
+def name(pretty=False):
+    """
+    Return the name of the current OS distribution, as a human-readable
+    string.
+
+    If *pretty* is false, the name is returned without version or codename.
+    (e.g. "CentOS Linux")
+
+    If *pretty* is true, the version and codename are appended.
+    (e.g. "CentOS Linux 7.1.1503 (Core)")
+
+    **Lookup hierarchy:**
+
+    The name is obtained from the following sources, in the specified order.
+    The first available and non-empty value is used:
+
+    * If *pretty* is false:
+
+      - the value of the "NAME" attribute of the os-release file,
+
+      - the value of the "Distributor ID" attribute returned by the lsb_release
+        command,
+
+      - the value of the "<name>" field of the distro release file.
+
+    * If *pretty* is true:
+
+      - the value of the "PRETTY_NAME" attribute of the os-release file,
+
+      - the value of the "Description" attribute returned by the lsb_release
+        command,
+
+      - the value of the "<name>" field of the distro release file, appended
+        with the value of the pretty version ("<version_id>" and "<codename>"
+        fields) of the distro release file, if available.
+    """
+    return _distro.name(pretty)
+
+
+def version(pretty=False, best=False):
+    """
+    Return the version of the current OS distribution, as a human-readable
+    string.
+
+    If *pretty* is false, the version is returned without codename (e.g.
+    "7.0").
+
+    If *pretty* is true, the codename in parenthesis is appended, if the
+    codename is non-empty (e.g. "7.0 (Maipo)").
+
+    Some distributions provide version numbers with different precisions in
+    the different sources of distribution information. Examining the different
+    sources in a fixed priority order does not always yield the most precise
+    version (e.g. for Debian 8.2, or CentOS 7.1).
+
+    The *best* parameter can be used to control the approach for the returned
+    version:
+
+    If *best* is false, the first non-empty version number in priority order of
+    the examined sources is returned.
+
+    If *best* is true, the most precise version number out of all examined
+    sources is returned.
+
+    **Lookup hierarchy:**
+
+    In all cases, the version number is obtained from the following sources.
+    If *best* is false, this order represents the priority order:
+
+    * the value of the "VERSION_ID" attribute of the os-release file,
+    * the value of the "Release" attribute returned by the lsb_release
+      command,
+    * the version number parsed from the "<version_id>" field of the first line
+      of the distro release file,
+    * the version number parsed from the "PRETTY_NAME" attribute of the
+      os-release file, if it follows the format of the distro release files.
+    * the version number parsed from the "Description" attribute returned by
+      the lsb_release command, if it follows the format of the distro release
+      files.
+    """
+    return _distro.version(pretty, best)
+
+
+def version_parts(best=False):
+    """
+    Return the version of the current OS distribution as a tuple
+    ``(major, minor, build_number)`` with items as follows:
+
+    * ``major``:  The result of :func:`distro.major_version`.
+
+    * ``minor``:  The result of :func:`distro.minor_version`.
+
+    * ``build_number``:  The result of :func:`distro.build_number`.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.version_parts(best)
+
+
+def major_version(best=False):
+    """
+    Return the major version of the current OS distribution, as a string,
+    if provided.
+    Otherwise, the empty string is returned. The major version is the first
+    part of the dot-separated version string.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.major_version(best)
+
+
+def minor_version(best=False):
+    """
+    Return the minor version of the current OS distribution, as a string,
+    if provided.
+    Otherwise, the empty string is returned. The minor version is the second
+    part of the dot-separated version string.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.minor_version(best)
+
+
+def build_number(best=False):
+    """
+    Return the build number of the current OS distribution, as a string,
+    if provided.
+    Otherwise, the empty string is returned. The build number is the third part
+    of the dot-separated version string.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.build_number(best)
+
+
+def like():
+    """
+    Return a space-separated list of distro IDs of distributions that are
+    closely related to the current OS distribution in regards to packaging
+    and programming interfaces, for example distributions the current
+    distribution is a derivative from.
+
+    **Lookup hierarchy:**
+
+    This information item is only provided by the os-release file.
+    For details, see the description of the "ID_LIKE" attribute in the
+    `os-release man page
+    <http://www.freedesktop.org/software/systemd/man/os-release.html>`_.
+    """
+    return _distro.like()
+
+
+def codename():
+    """
+    Return the codename for the release of the current OS distribution,
+    as a string.
+
+    If the distribution does not have a codename, an empty string is returned.
+
+    Note that the returned codename is not always really a codename. For
+    example, openSUSE returns "x86_64". This function does not handle such
+    cases in any special way and just returns the string it finds, if any.
+
+    **Lookup hierarchy:**
+
+    * the codename within the "VERSION" attribute of the os-release file, if
+      provided,
+
+    * the value of the "Codename" attribute returned by the lsb_release
+      command,
+
+    * the value of the "<codename>" field of the distro release file.
+    """
+    return _distro.codename()
+
+
+def info(pretty=False, best=False):
+    """
+    Return certain machine-readable information items about the current OS
+    distribution in a dictionary, as shown in the following example:
+
+    .. sourcecode:: python
+
+        {
+            'id': 'rhel',
+            'version': '7.0',
+            'version_parts': {
+                'major': '7',
+                'minor': '0',
+                'build_number': ''
+            },
+            'like': 'fedora',
+            'codename': 'Maipo'
+        }
+
+    The dictionary structure and keys are always the same, regardless of which
+    information items are available in the underlying data sources. The values
+    for the various keys are as follows:
+
+    * ``id``:  The result of :func:`distro.id`.
+
+    * ``version``:  The result of :func:`distro.version`.
+
+    * ``version_parts -> major``:  The result of :func:`distro.major_version`.
+
+    * ``version_parts -> minor``:  The result of :func:`distro.minor_version`.
+
+    * ``version_parts -> build_number``:  The result of
+      :func:`distro.build_number`.
+
+    * ``like``:  The result of :func:`distro.like`.
+
+    * ``codename``:  The result of :func:`distro.codename`.
+
+    For a description of the *pretty* and *best* parameters, see the
+    :func:`distro.version` method.
+    """
+    return _distro.info(pretty, best)
+
+
+def os_release_info():
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the os-release file data source of the current OS distribution.
+
+    See `os-release file`_ for details about these information items.
+    """
+    return _distro.os_release_info()
+
+
+def lsb_release_info():
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the lsb_release command data source of the current OS distribution.
+
+    See `lsb_release command output`_ for details about these information
+    items.
+    """
+    return _distro.lsb_release_info()
+
+
+def distro_release_info():
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the distro release file data source of the current OS distribution.
+
+    See `distro release file`_ for details about these information items.
+    """
+    return _distro.distro_release_info()
+
+
+def uname_info():
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the distro release file data source of the current OS distribution.
+    """
+    return _distro.uname_info()
+
+
+def os_release_attr(attribute):
+    """
+    Return a single named information item from the os-release file data source
+    of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+      The empty string, if the item does not exist.
+
+    See `os-release file`_ for details about these information items.
+    """
+    return _distro.os_release_attr(attribute)
+
+
+def lsb_release_attr(attribute):
+    """
+    Return a single named information item from the lsb_release command output
+    data source of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+      The empty string, if the item does not exist.
+
+    See `lsb_release command output`_ for details about these information
+    items.
+    """
+    return _distro.lsb_release_attr(attribute)
+
+
+def distro_release_attr(attribute):
+    """
+    Return a single named information item from the distro release file
+    data source of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+      The empty string, if the item does not exist.
+
+    See `distro release file`_ for details about these information items.
+    """
+    return _distro.distro_release_attr(attribute)
+
+
+def uname_attr(attribute):
+    """
+    Return a single named information item from the distro release file
+    data source of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+                The empty string, if the item does not exist.
+    """
+    return _distro.uname_attr(attribute)
+
+
+class cached_property(object):
+    """A version of @property which caches the value.  On access, it calls the
+    underlying function and sets the value in `__dict__` so future accesses
+    will not re-call the property.
+    """
+    def __init__(self, f):
+        self._fname = f.__name__
+        self._f = f
+
+    def __get__(self, obj, owner):
+        assert obj is not None, 'call {} on an instance'.format(self._fname)
+        ret = obj.__dict__[self._fname] = self._f(obj)
+        return ret
+
+
+class LinuxDistribution(object):
+    """
+    Provides information about a OS distribution.
+
+    This package creates a private module-global instance of this class with
+    default initialization arguments, that is used by the
+    `consolidated accessor functions`_ and `single source accessor functions`_.
+    By using default initialization arguments, that module-global instance
+    returns data about the current OS distribution (i.e. the distro this
+    package runs on).
+
+    Normally, it is not necessary to create additional instances of this class.
+    However, in situations where control is needed over the exact data sources
+    that are used, instances of this class can be created with a specific
+    distro release file, or a specific os-release file, or without invoking the
+    lsb_release command.
+    """
+
+    def __init__(self,
+                 include_lsb=True,
+                 os_release_file='',
+                 distro_release_file='',
+                 include_uname=True):
+        """
+        The initialization method of this class gathers information from the
+        available data sources, and stores that in private instance attributes.
+        Subsequent access to the information items uses these private instance
+        attributes, so that the data sources are read only once.
+
+        Parameters:
+
+        * ``include_lsb`` (bool): Controls whether the
+          `lsb_release command output`_ is included as a data source.
+
+          If the lsb_release command is not available in the program execution
+          path, the data source for the lsb_release command will be empty.
+
+        * ``os_release_file`` (string): The path name of the
+          `os-release file`_ that is to be used as a data source.
+
+          An empty string (the default) will cause the default path name to
+          be used (see `os-release file`_ for details).
+
+          If the specified or defaulted os-release file does not exist, the
+          data source for the os-release file will be empty.
+
+        * ``distro_release_file`` (string): The path name of the
+          `distro release file`_ that is to be used as a data source.
+
+          An empty string (the default) will cause a default search algorithm
+          to be used (see `distro release file`_ for details).
+
+          If the specified distro release file does not exist, or if no default
+          distro release file can be found, the data source for the distro
+          release file will be empty.
+
+        * ``include_uname`` (bool): Controls whether uname command output is
+          included as a data source. If the uname command is not available in
+          the program execution path the data source for the uname command will
+          be empty.
+
+        Public instance attributes:
+
+        * ``os_release_file`` (string): The path name of the
+          `os-release file`_ that is actually used as a data source. The
+          empty string if no distro release file is used as a data source.
+
+        * ``distro_release_file`` (string): The path name of the
+          `distro release file`_ that is actually used as a data source. The
+          empty string if no distro release file is used as a data source.
+
+        * ``include_lsb`` (bool): The result of the ``include_lsb`` parameter.
+          This controls whether the lsb information will be loaded.
+
+        * ``include_uname`` (bool): The result of the ``include_uname``
+          parameter. This controls whether the uname information will
+          be loaded.
+
+        Raises:
+
+        * :py:exc:`IOError`: Some I/O issue with an os-release file or distro
+          release file.
+
+        * :py:exc:`subprocess.CalledProcessError`: The lsb_release command had
+          some issue (other than not being available in the program execution
+          path).
+
+        * :py:exc:`UnicodeError`: A data source has unexpected characters or
+          uses an unexpected encoding.
+        """
+        self.os_release_file = os_release_file or \
+            os.path.join(_UNIXCONFDIR, _OS_RELEASE_BASENAME)
+        self.distro_release_file = distro_release_file or ''  # updated later
+        self.include_lsb = include_lsb
+        self.include_uname = include_uname
+
+    def __repr__(self):
+        """Return repr of all info
+        """
+        return \
+            "LinuxDistribution(" \
+            "os_release_file={self.os_release_file!r}, " \
+            "distro_release_file={self.distro_release_file!r}, " \
+            "include_lsb={self.include_lsb!r}, " \
+            "include_uname={self.include_uname!r}, " \
+            "_os_release_info={self._os_release_info!r}, " \
+            "_lsb_release_info={self._lsb_release_info!r}, " \
+            "_distro_release_info={self._distro_release_info!r}, " \
+            "_uname_info={self._uname_info!r})".format(
+                self=self)
+
+    def linux_distribution(self, full_distribution_name=True):
+        """
+        Return information about the OS distribution that is compatible
+        with Python's :func:`platform.linux_distribution`, supporting a subset
+        of its parameters.
+
+        For details, see :func:`distro.linux_distribution`.
+        """
+        return (
+            self.name() if full_distribution_name else self.id(),
+            self.version(),
+            self.codename()
+        )
+
+    def id(self):
+        """Return the distro ID of the OS distribution, as a string.
+
+        For details, see :func:`distro.id`.
+        """
+        def normalize(distro_id, table):
+            distro_id = distro_id.lower().replace(' ', '_')
+            return table.get(distro_id, distro_id)
+
+        distro_id = self.os_release_attr('id')
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_OS_ID)
+
+        distro_id = self.lsb_release_attr('distributor_id')
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_LSB_ID)
+
+        distro_id = self.distro_release_attr('id')
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_DISTRO_ID)
+
+        distro_id = self.uname_attr('id')
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_DISTRO_ID)
+
+        return ''
+
+    def name(self, pretty=False):
+        """
+        Return the name of the OS distribution, as a string.
+
+        For details, see :func:`distro.name`.
+        """
+        name = self.os_release_attr('name') \
+            or self.lsb_release_attr('distributor_id') \
+            or self.distro_release_attr('name') \
+            or self.uname_attr('name')
+        if pretty:
+            name = self.os_release_attr('pretty_name') \
+                or self.lsb_release_attr('description')
+            if not name:
+                name = self.distro_release_attr('name') \
+                       or self.uname_attr('name')
+                version = self.version(pretty=True)
+                if version:
+                    name = name + ' ' + version
+        return name or ''
+
+    def version(self, pretty=False, best=False):
+        """
+        Return the version of the OS distribution, as a string.
+
+        For details, see :func:`distro.version`.
+        """
+        versions = [
+            self.os_release_attr('version_id'),
+            self.lsb_release_attr('release'),
+            self.distro_release_attr('version_id'),
+            self._parse_distro_release_content(
+                self.os_release_attr('pretty_name')).get('version_id', ''),
+            self._parse_distro_release_content(
+                self.lsb_release_attr('description')).get('version_id', ''),
+            self.uname_attr('release')
+        ]
+        version = ''
+        if best:
+            # This algorithm uses the last version in priority order that has
+            # the best precision. If the versions are not in conflict, that
+            # does not matter; otherwise, using the last one instead of the
+            # first one might be considered a surprise.
+            for v in versions:
+                if v.count(".") > version.count(".") or version == '':
+                    version = v
+        else:
+            for v in versions:
+                if v != '':
+                    version = v
+                    break
+        if pretty and version and self.codename():
+            version = '{0} ({1})'.format(version, self.codename())
+        return version
+
+    def version_parts(self, best=False):
+        """
+        Return the version of the OS distribution, as a tuple of version
+        numbers.
+
+        For details, see :func:`distro.version_parts`.
+        """
+        version_str = self.version(best=best)
+        if version_str:
+            version_regex = re.compile(r'(\d+)\.?(\d+)?\.?(\d+)?')
+            matches = version_regex.match(version_str)
+            if matches:
+                major, minor, build_number = matches.groups()
+                return major, minor or '', build_number or ''
+        return '', '', ''
+
+    def major_version(self, best=False):
+        """
+        Return the major version number of the current distribution.
+
+        For details, see :func:`distro.major_version`.
+        """
+        return self.version_parts(best)[0]
+
+    def minor_version(self, best=False):
+        """
+        Return the minor version number of the current distribution.
+
+        For details, see :func:`distro.minor_version`.
+        """
+        return self.version_parts(best)[1]
+
+    def build_number(self, best=False):
+        """
+        Return the build number of the current distribution.
+
+        For details, see :func:`distro.build_number`.
+        """
+        return self.version_parts(best)[2]
+
+    def like(self):
+        """
+        Return the IDs of distributions that are like the OS distribution.
+
+        For details, see :func:`distro.like`.
+        """
+        return self.os_release_attr('id_like') or ''
+
+    def codename(self):
+        """
+        Return the codename of the OS distribution.
+
+        For details, see :func:`distro.codename`.
+        """
+        try:
+            # Handle os_release specially since distros might purposefully set
+            # this to empty string to have no codename
+            return self._os_release_info['codename']
+        except KeyError:
+            return self.lsb_release_attr('codename') \
+                or self.distro_release_attr('codename') \
+                or ''
+
+    def info(self, pretty=False, best=False):
+        """
+        Return certain machine-readable information about the OS
+        distribution.
+
+        For details, see :func:`distro.info`.
+        """
+        return dict(
+            id=self.id(),
+            version=self.version(pretty, best),
+            version_parts=dict(
+                major=self.major_version(best),
+                minor=self.minor_version(best),
+                build_number=self.build_number(best)
+            ),
+            like=self.like(),
+            codename=self.codename(),
+        )
+
+    def os_release_info(self):
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the os-release file data source of the OS distribution.
+
+        For details, see :func:`distro.os_release_info`.
+        """
+        return self._os_release_info
+
+    def lsb_release_info(self):
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the lsb_release command data source of the OS
+        distribution.
+
+        For details, see :func:`distro.lsb_release_info`.
+        """
+        return self._lsb_release_info
+
+    def distro_release_info(self):
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the distro release file data source of the OS
+        distribution.
+
+        For details, see :func:`distro.distro_release_info`.
+        """
+        return self._distro_release_info
+
+    def uname_info(self):
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the uname command data source of the OS distribution.
+
+        For details, see :func:`distro.uname_info`.
+        """
+        return self._uname_info
+
+    def os_release_attr(self, attribute):
+        """
+        Return a single named information item from the os-release file data
+        source of the OS distribution.
+
+        For details, see :func:`distro.os_release_attr`.
+        """
+        return self._os_release_info.get(attribute, '')
+
+    def lsb_release_attr(self, attribute):
+        """
+        Return a single named information item from the lsb_release command
+        output data source of the OS distribution.
+
+        For details, see :func:`distro.lsb_release_attr`.
+        """
+        return self._lsb_release_info.get(attribute, '')
+
+    def distro_release_attr(self, attribute):
+        """
+        Return a single named information item from the distro release file
+        data source of the OS distribution.
+
+        For details, see :func:`distro.distro_release_attr`.
+        """
+        return self._distro_release_info.get(attribute, '')
+
+    def uname_attr(self, attribute):
+        """
+        Return a single named information item from the uname command
+        output data source of the OS distribution.
+
+        For details, see :func:`distro.uname_release_attr`.
+        """
+        return self._uname_info.get(attribute, '')
+
+    @cached_property
+    def _os_release_info(self):
+        """
+        Get the information items from the specified os-release file.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        if os.path.isfile(self.os_release_file):
+            with open(self.os_release_file) as release_file:
+                return self._parse_os_release_content(release_file)
+        return {}
+
+    @staticmethod
+    def _parse_os_release_content(lines):
+        """
+        Parse the lines of an os-release file.
+
+        Parameters:
+
+        * lines: Iterable through the lines in the os-release file.
+                 Each line must be a unicode string or a UTF-8 encoded byte
+                 string.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        props = {}
+        lexer = shlex.shlex(lines, posix=True)
+        lexer.whitespace_split = True
+
+        # The shlex module defines its `wordchars` variable using literals,
+        # making it dependent on the encoding of the Python source file.
+        # In Python 2.6 and 2.7, the shlex source file is encoded in
+        # 'iso-8859-1', and the `wordchars` variable is defined as a byte
+        # string. This causes a UnicodeDecodeError to be raised when the
+        # parsed content is a unicode object. The following fix resolves that
+        # (... but it should be fixed in shlex...):
+        if sys.version_info[0] == 2 and isinstance(lexer.wordchars, bytes):
+            lexer.wordchars = lexer.wordchars.decode('iso-8859-1')
+
+        tokens = list(lexer)
+        for token in tokens:
+            # At this point, all shell-like parsing has been done (i.e.
+            # comments processed, quotes and backslash escape sequences
+            # processed, multi-line values assembled, trailing newlines
+            # stripped, etc.), so the tokens are now either:
+            # * variable assignments: var=value
+            # * commands or their arguments (not allowed in os-release)
+            if '=' in token:
+                k, v = token.split('=', 1)
+                props[k.lower()] = v
+            else:
+                # Ignore any tokens that are not variable assignments
+                pass
+
+        if 'version_codename' in props:
+            # os-release added a version_codename field.  Use that in
+            # preference to anything else Note that some distros purposefully
+            # do not have code names.  They should be setting
+            # version_codename=""
+            props['codename'] = props['version_codename']
+        elif 'ubuntu_codename' in props:
+            # Same as above but a non-standard field name used on older Ubuntus
+            props['codename'] = props['ubuntu_codename']
+        elif 'version' in props:
+            # If there is no version_codename, parse it from the version
+            codename = re.search(r'(\(\D+\))|,(\s+)?\D+', props['version'])
+            if codename:
+                codename = codename.group()
+                codename = codename.strip('()')
+                codename = codename.strip(',')
+                codename = codename.strip()
+                # codename appears within paranthese.
+                props['codename'] = codename
+
+        return props
+
+    @cached_property
+    def _lsb_release_info(self):
+        """
+        Get the information items from the lsb_release command output.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        if not self.include_lsb:
+            return {}
+        with open(os.devnull, 'w') as devnull:
+            try:
+                cmd = ('lsb_release', '-a')
+                stdout = subprocess.check_output(cmd, stderr=devnull)
+            except OSError:  # Command not found
+                return {}
+        content = self._to_str(stdout).splitlines()
+        return self._parse_lsb_release_content(content)
+
+    @staticmethod
+    def _parse_lsb_release_content(lines):
+        """
+        Parse the output of the lsb_release command.
+
+        Parameters:
+
+        * lines: Iterable through the lines of the lsb_release output.
+                 Each line must be a unicode string or a UTF-8 encoded byte
+                 string.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        props = {}
+        for line in lines:
+            kv = line.strip('\n').split(':', 1)
+            if len(kv) != 2:
+                # Ignore lines without colon.
+                continue
+            k, v = kv
+            props.update({k.replace(' ', '_').lower(): v.strip()})
+        return props
+
+    @cached_property
+    def _uname_info(self):
+        with open(os.devnull, 'w') as devnull:
+            try:
+                cmd = ('uname', '-rs')
+                stdout = subprocess.check_output(cmd, stderr=devnull)
+            except OSError:
+                return {}
+        content = self._to_str(stdout).splitlines()
+        return self._parse_uname_content(content)
+
+    @staticmethod
+    def _parse_uname_content(lines):
+        props = {}
+        match = re.search(r'^([^\s]+)\s+([\d\.]+)', lines[0].strip())
+        if match:
+            name, version = match.groups()
+
+            # This is to prevent the Linux kernel version from
+            # appearing as the 'best' version on otherwise
+            # identifiable distributions.
+            if name == 'Linux':
+                return {}
+            props['id'] = name.lower()
+            props['name'] = name
+            props['release'] = version
+        return props
+
+    @staticmethod
+    def _to_str(text):
+        encoding = sys.getfilesystemencoding()
+        encoding = 'utf-8' if encoding == 'ascii' else encoding
+
+        if sys.version_info[0] >= 3:
+            if isinstance(text, bytes):
+                return text.decode(encoding)
+        else:
+            if isinstance(text, unicode):  # noqa
+                return text.encode(encoding)
+
+        return text
+
+    @cached_property
+    def _distro_release_info(self):
+        """
+        Get the information items from the specified distro release file.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        if self.distro_release_file:
+            # If it was specified, we use it and parse what we can, even if
+            # its file name or content does not match the expected pattern.
+            distro_info = self._parse_distro_release_file(
+                self.distro_release_file)
+            basename = os.path.basename(self.distro_release_file)
+            # The file name pattern for user-specified distro release files
+            # is somewhat more tolerant (compared to when searching for the
+            # file), because we want to use what was specified as best as
+            # possible.
+            match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
+            if 'name' in distro_info \
+               and 'cloudlinux' in distro_info['name'].lower():
+                distro_info['id'] = 'cloudlinux'
+            elif match:
+                distro_info['id'] = match.group(1)
+            return distro_info
+        else:
+            try:
+                basenames = os.listdir(_UNIXCONFDIR)
+                # We sort for repeatability in cases where there are multiple
+                # distro specific files; e.g. CentOS, Oracle, Enterprise all
+                # containing `redhat-release` on top of their own.
+                basenames.sort()
+            except OSError:
+                # This may occur when /etc is not readable but we can't be
+                # sure about the *-release files. Check common entries of
+                # /etc for information. If they turn out to not be there the
+                # error is handled in `_parse_distro_release_file()`.
+                basenames = ['SuSE-release',
+                             'arch-release',
+                             'base-release',
+                             'centos-release',
+                             'fedora-release',
+                             'gentoo-release',
+                             'mageia-release',
+                             'mandrake-release',
+                             'mandriva-release',
+                             'mandrivalinux-release',
+                             'manjaro-release',
+                             'oracle-release',
+                             'redhat-release',
+                             'sl-release',
+                             'slackware-version']
+            for basename in basenames:
+                if basename in _DISTRO_RELEASE_IGNORE_BASENAMES:
+                    continue
+                match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
+                if match:
+                    filepath = os.path.join(_UNIXCONFDIR, basename)
+                    distro_info = self._parse_distro_release_file(filepath)
+                    if 'name' in distro_info:
+                        # The name is always present if the pattern matches
+                        self.distro_release_file = filepath
+                        distro_info['id'] = match.group(1)
+                        if 'cloudlinux' in distro_info['name'].lower():
+                            distro_info['id'] = 'cloudlinux'
+                        return distro_info
+            return {}
+
+    def _parse_distro_release_file(self, filepath):
+        """
+        Parse a distro release file.
+
+        Parameters:
+
+        * filepath: Path name of the distro release file.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        try:
+            with open(filepath) as fp:
+                # Only parse the first line. For instance, on SLES there
+                # are multiple lines. We don't want them...
+                return self._parse_distro_release_content(fp.readline())
+        except (OSError, IOError):
+            # Ignore not being able to read a specific, seemingly version
+            # related file.
+            # See https://github.com/nir0s/distro/issues/162
+            return {}
+
+    @staticmethod
+    def _parse_distro_release_content(line):
+        """
+        Parse a line from a distro release file.
+
+        Parameters:
+        * line: Line from the distro release file. Must be a unicode string
+                or a UTF-8 encoded byte string.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        matches = _DISTRO_RELEASE_CONTENT_REVERSED_PATTERN.match(
+            line.strip()[::-1])
+        distro_info = {}
+        if matches:
+            # regexp ensures non-None
+            distro_info['name'] = matches.group(3)[::-1]
+            if matches.group(2):
+                distro_info['version_id'] = matches.group(2)[::-1]
+            if matches.group(1):
+                distro_info['codename'] = matches.group(1)[::-1]
+        elif line:
+            distro_info['name'] = line.strip()
+        return distro_info
+
+
+_distro = LinuxDistribution()
+
+
+def main():
+    logger = logging.getLogger(__name__)
+    logger.setLevel(logging.DEBUG)
+    logger.addHandler(logging.StreamHandler(sys.stdout))
+
+    parser = argparse.ArgumentParser(description="OS distro info tool")
+    parser.add_argument(
+        '--json',
+        '-j',
+        help="Output in machine readable format",
+        action="store_true")
+    args = parser.parse_args()
+
+    if args.json:
+        logger.info(json.dumps(info(), indent=4, sort_keys=True))
+    else:
+        logger.info('Name: %s', name(pretty=True))
+        distribution_version = version(pretty=True)
+        logger.info('Version: %s', distribution_version)
+        distribution_codename = codename()
+        logger.info('Codename: %s', distribution_codename)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/__init__.py
new file mode 100644
index 0000000..d1d82f1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/__init__.py
@@ -0,0 +1,35 @@
+"""
+HTML parsing library based on the `WHATWG HTML specification
+<https://whatwg.org/html>`_. The parser is designed to be compatible with
+existing HTML found in the wild and implements well-defined error recovery that
+is largely compatible with modern desktop web browsers.
+
+Example usage::
+
+    from pip._vendor import html5lib
+    with open("my_document.html", "rb") as f:
+        tree = html5lib.parse(f)
+
+For convenience, this module re-exports the following names:
+
+* :func:`~.html5parser.parse`
+* :func:`~.html5parser.parseFragment`
+* :class:`~.html5parser.HTMLParser`
+* :func:`~.treebuilders.getTreeBuilder`
+* :func:`~.treewalkers.getTreeWalker`
+* :func:`~.serializer.serialize`
+"""
+
+from __future__ import absolute_import, division, unicode_literals
+
+from .html5parser import HTMLParser, parse, parseFragment
+from .treebuilders import getTreeBuilder
+from .treewalkers import getTreeWalker
+from .serializer import serialize
+
+__all__ = ["HTMLParser", "parse", "parseFragment", "getTreeBuilder",
+           "getTreeWalker", "serialize"]
+
+# this has to be at the top level, see how setup.py parses this
+#: Distribution version number.
+__version__ = "1.1"
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--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_ihatexml.py
@@ -0,0 +1,289 @@
+from __future__ import absolute_import, division, unicode_literals
+
+import re
+import warnings
+
+from .constants import DataLossWarning
+
+baseChar = """
+[#x0041-#x005A] | [#x0061-#x007A] | [#x00C0-#x00D6] | [#x00D8-#x00F6] |
+[#x00F8-#x00FF] | [#x0100-#x0131] | [#x0134-#x013E] | [#x0141-#x0148] |
+[#x014A-#x017E] | [#x0180-#x01C3] | [#x01CD-#x01F0] | [#x01F4-#x01F5] |
+[#x01FA-#x0217] | [#x0250-#x02A8] | [#x02BB-#x02C1] | #x0386 |
+[#x0388-#x038A] | #x038C | [#x038E-#x03A1] | [#x03A3-#x03CE] |
+[#x03D0-#x03D6] | #x03DA | #x03DC | #x03DE | #x03E0 | [#x03E2-#x03F3] |
+[#x0401-#x040C] | [#x040E-#x044F] | [#x0451-#x045C] | [#x045E-#x0481] |
+[#x0490-#x04C4] | [#x04C7-#x04C8] | [#x04CB-#x04CC] | [#x04D0-#x04EB] |
+[#x04EE-#x04F5] | [#x04F8-#x04F9] | [#x0531-#x0556] | #x0559 |
+[#x0561-#x0586] | [#x05D0-#x05EA] | [#x05F0-#x05F2] | [#x0621-#x063A] |
+[#x0641-#x064A] | [#x0671-#x06B7] | [#x06BA-#x06BE] | [#x06C0-#x06CE] |
+[#x06D0-#x06D3] | #x06D5 | [#x06E5-#x06E6] | [#x0905-#x0939] | #x093D |
+[#x0958-#x0961] | [#x0985-#x098C] | [#x098F-#x0990] | [#x0993-#x09A8] |
+[#x09AA-#x09B0] | #x09B2 | [#x09B6-#x09B9] | [#x09DC-#x09DD] |
+[#x09DF-#x09E1] | [#x09F0-#x09F1] | [#x0A05-#x0A0A] | [#x0A0F-#x0A10] |
+[#x0A13-#x0A28] | [#x0A2A-#x0A30] | [#x0A32-#x0A33] | [#x0A35-#x0A36] |
+[#x0A38-#x0A39] | [#x0A59-#x0A5C] | #x0A5E | [#x0A72-#x0A74] |
+[#x0A85-#x0A8B] | #x0A8D | [#x0A8F-#x0A91] | [#x0A93-#x0AA8] |
+[#x0AAA-#x0AB0] | [#x0AB2-#x0AB3] | [#x0AB5-#x0AB9] | #x0ABD | #x0AE0 |
+[#x0B05-#x0B0C] | [#x0B0F-#x0B10] | [#x0B13-#x0B28] | [#x0B2A-#x0B30] |
+[#x0B32-#x0B33] | [#x0B36-#x0B39] | #x0B3D | [#x0B5C-#x0B5D] |
+[#x0B5F-#x0B61] | [#x0B85-#x0B8A] | [#x0B8E-#x0B90] | [#x0B92-#x0B95] |
+[#x0B99-#x0B9A] | #x0B9C | [#x0B9E-#x0B9F] | [#x0BA3-#x0BA4] |
+[#x0BA8-#x0BAA] | [#x0BAE-#x0BB5] | [#x0BB7-#x0BB9] | [#x0C05-#x0C0C] |
+[#x0C0E-#x0C10] | [#x0C12-#x0C28] | [#x0C2A-#x0C33] | [#x0C35-#x0C39] |
+[#x0C60-#x0C61] | [#x0C85-#x0C8C] | [#x0C8E-#x0C90] | [#x0C92-#x0CA8] |
+[#x0CAA-#x0CB3] | [#x0CB5-#x0CB9] | #x0CDE | [#x0CE0-#x0CE1] |
+[#x0D05-#x0D0C] | [#x0D0E-#x0D10] | [#x0D12-#x0D28] | [#x0D2A-#x0D39] |
+[#x0D60-#x0D61] | [#x0E01-#x0E2E] | #x0E30 | [#x0E32-#x0E33] |
+[#x0E40-#x0E45] | [#x0E81-#x0E82] | #x0E84 | [#x0E87-#x0E88] | #x0E8A |
+#x0E8D | [#x0E94-#x0E97] | [#x0E99-#x0E9F] | [#x0EA1-#x0EA3] | #x0EA5 |
+#x0EA7 | [#x0EAA-#x0EAB] | [#x0EAD-#x0EAE] | #x0EB0 | [#x0EB2-#x0EB3] |
+#x0EBD | [#x0EC0-#x0EC4] | [#x0F40-#x0F47] | [#x0F49-#x0F69] |
+[#x10A0-#x10C5] | [#x10D0-#x10F6] | #x1100 | [#x1102-#x1103] |
+[#x1105-#x1107] | #x1109 | [#x110B-#x110C] | [#x110E-#x1112] | #x113C |
+#x113E | #x1140 | #x114C | #x114E | #x1150 | [#x1154-#x1155] | #x1159 |
+[#x115F-#x1161] | #x1163 | #x1165 | #x1167 | #x1169 | [#x116D-#x116E] |
+[#x1172-#x1173] | #x1175 | #x119E | #x11A8 | #x11AB | [#x11AE-#x11AF] |
+[#x11B7-#x11B8] | #x11BA | [#x11BC-#x11C2] | #x11EB | #x11F0 | #x11F9 |
+[#x1E00-#x1E9B] | [#x1EA0-#x1EF9] | [#x1F00-#x1F15] | [#x1F18-#x1F1D] |
+[#x1F20-#x1F45] | [#x1F48-#x1F4D] | [#x1F50-#x1F57] | #x1F59 | #x1F5B |
+#x1F5D | [#x1F5F-#x1F7D] | [#x1F80-#x1FB4] | [#x1FB6-#x1FBC] | #x1FBE |
+[#x1FC2-#x1FC4] | [#x1FC6-#x1FCC] | [#x1FD0-#x1FD3] | [#x1FD6-#x1FDB] |
+[#x1FE0-#x1FEC] | [#x1FF2-#x1FF4] | [#x1FF6-#x1FFC] | #x2126 |
+[#x212A-#x212B] | #x212E | [#x2180-#x2182] | [#x3041-#x3094] |
+[#x30A1-#x30FA] | [#x3105-#x312C] | [#xAC00-#xD7A3]"""
+
+ideographic = """[#x4E00-#x9FA5] | #x3007 | [#x3021-#x3029]"""
+
+combiningCharacter = """
+[#x0300-#x0345] | [#x0360-#x0361] | [#x0483-#x0486] | [#x0591-#x05A1] |
+[#x05A3-#x05B9] | [#x05BB-#x05BD] | #x05BF | [#x05C1-#x05C2] | #x05C4 |
+[#x064B-#x0652] | #x0670 | [#x06D6-#x06DC] | [#x06DD-#x06DF] |
+[#x06E0-#x06E4] | [#x06E7-#x06E8] | [#x06EA-#x06ED] | [#x0901-#x0903] |
+#x093C | [#x093E-#x094C] | #x094D | [#x0951-#x0954] | [#x0962-#x0963] |
+[#x0981-#x0983] | #x09BC | #x09BE | #x09BF | [#x09C0-#x09C4] |
+[#x09C7-#x09C8] | [#x09CB-#x09CD] | #x09D7 | [#x09E2-#x09E3] | #x0A02 |
+#x0A3C | #x0A3E | #x0A3F | [#x0A40-#x0A42] | [#x0A47-#x0A48] |
+[#x0A4B-#x0A4D] | [#x0A70-#x0A71] | [#x0A81-#x0A83] | #x0ABC |
+[#x0ABE-#x0AC5] | [#x0AC7-#x0AC9] | [#x0ACB-#x0ACD] | [#x0B01-#x0B03] |
+#x0B3C | [#x0B3E-#x0B43] | [#x0B47-#x0B48] | [#x0B4B-#x0B4D] |
+[#x0B56-#x0B57] | [#x0B82-#x0B83] | [#x0BBE-#x0BC2] | [#x0BC6-#x0BC8] |
+[#x0BCA-#x0BCD] | #x0BD7 | [#x0C01-#x0C03] | [#x0C3E-#x0C44] |
+[#x0C46-#x0C48] | [#x0C4A-#x0C4D] | [#x0C55-#x0C56] | [#x0C82-#x0C83] |
+[#x0CBE-#x0CC4] | [#x0CC6-#x0CC8] | [#x0CCA-#x0CCD] | [#x0CD5-#x0CD6] |
+[#x0D02-#x0D03] | [#x0D3E-#x0D43] | [#x0D46-#x0D48] | [#x0D4A-#x0D4D] |
+#x0D57 | #x0E31 | [#x0E34-#x0E3A] | [#x0E47-#x0E4E] | #x0EB1 |
+[#x0EB4-#x0EB9] | [#x0EBB-#x0EBC] | [#x0EC8-#x0ECD] | [#x0F18-#x0F19] |
+#x0F35 | #x0F37 | #x0F39 | #x0F3E | #x0F3F | [#x0F71-#x0F84] |
+[#x0F86-#x0F8B] | [#x0F90-#x0F95] | #x0F97 | [#x0F99-#x0FAD] |
+[#x0FB1-#x0FB7] | #x0FB9 | [#x20D0-#x20DC] | #x20E1 | [#x302A-#x302F] |
+#x3099 | #x309A"""
+
+digit = """
+[#x0030-#x0039] | [#x0660-#x0669] | [#x06F0-#x06F9] | [#x0966-#x096F] |
+[#x09E6-#x09EF] | [#x0A66-#x0A6F] | [#x0AE6-#x0AEF] | [#x0B66-#x0B6F] |
+[#x0BE7-#x0BEF] | [#x0C66-#x0C6F] | [#x0CE6-#x0CEF] | [#x0D66-#x0D6F] |
+[#x0E50-#x0E59] | [#x0ED0-#x0ED9] | [#x0F20-#x0F29]"""
+
+extender = """
+#x00B7 | #x02D0 | #x02D1 | #x0387 | #x0640 | #x0E46 | #x0EC6 | #x3005 |
+#[#x3031-#x3035] | [#x309D-#x309E] | [#x30FC-#x30FE]"""
+
+letter = " | ".join([baseChar, ideographic])
+
+# Without the
+name = " | ".join([letter, digit, ".", "-", "_", combiningCharacter,
+                   extender])
+nameFirst = " | ".join([letter, "_"])
+
+reChar = re.compile(r"#x([\d|A-F]{4,4})")
+reCharRange = re.compile(r"\[#x([\d|A-F]{4,4})-#x([\d|A-F]{4,4})\]")
+
+
+def charStringToList(chars):
+    charRanges = [item.strip() for item in chars.split(" | ")]
+    rv = []
+    for item in charRanges:
+        foundMatch = False
+        for regexp in (reChar, reCharRange):
+            match = regexp.match(item)
+            if match is not None:
+                rv.append([hexToInt(item) for item in match.groups()])
+                if len(rv[-1]) == 1:
+                    rv[-1] = rv[-1] * 2
+                foundMatch = True
+                break
+        if not foundMatch:
+            assert len(item) == 1
+
+            rv.append([ord(item)] * 2)
+    rv = normaliseCharList(rv)
+    return rv
+
+
+def normaliseCharList(charList):
+    charList = sorted(charList)
+    for item in charList:
+        assert item[1] >= item[0]
+    rv = []
+    i = 0
+    while i < len(charList):
+        j = 1
+        rv.append(charList[i])
+        while i + j < len(charList) and charList[i + j][0] <= rv[-1][1] + 1:
+            rv[-1][1] = charList[i + j][1]
+            j += 1
+        i += j
+    return rv
+
+
+# We don't really support characters above the BMP :(
+max_unicode = int("FFFF", 16)
+
+
+def missingRanges(charList):
+    rv = []
+    if charList[0] != 0:
+        rv.append([0, charList[0][0] - 1])
+    for i, item in enumerate(charList[:-1]):
+        rv.append([item[1] + 1, charList[i + 1][0] - 1])
+    if charList[-1][1] != max_unicode:
+        rv.append([charList[-1][1] + 1, max_unicode])
+    return rv
+
+
+def listToRegexpStr(charList):
+    rv = []
+    for item in charList:
+        if item[0] == item[1]:
+            rv.append(escapeRegexp(chr(item[0])))
+        else:
+            rv.append(escapeRegexp(chr(item[0])) + "-" +
+                      escapeRegexp(chr(item[1])))
+    return "[%s]" % "".join(rv)
+
+
+def hexToInt(hex_str):
+    return int(hex_str, 16)
+
+
+def escapeRegexp(string):
+    specialCharacters = (".", "^", "$", "*", "+", "?", "{", "}",
+                         "[", "]", "|", "(", ")", "-")
+    for char in specialCharacters:
+        string = string.replace(char, "\\" + char)
+
+    return string
+
+# output from the above
+nonXmlNameBMPRegexp = re.compile('[\x00-,/:-@\\[-\\^`\\{-\xb6\xb8-\xbf\xd7\xf7\u0132-\u0133\u013f-\u0140\u0149\u017f\u01c4-\u01cc\u01f1-\u01f3\u01f6-\u01f9\u0218-\u024f\u02a9-\u02ba\u02c2-\u02cf\u02d2-\u02ff\u0346-\u035f\u0362-\u0385\u038b\u038d\u03a2\u03cf\u03d7-\u03d9\u03db\u03dd\u03df\u03e1\u03f4-\u0400\u040d\u0450\u045d\u0482\u0487-\u048f\u04c5-\u04c6\u04c9-\u04ca\u04cd-\u04cf\u04ec-\u04ed\u04f6-\u04f7\u04fa-\u0530\u0557-\u0558\u055a-\u0560\u0587-\u0590\u05a2\u05ba\u05be\u05c0\u05c3\u05c5-\u05cf\u05eb-\u05ef\u05f3-\u0620\u063b-\u063f\u0653-\u065f\u066a-\u066f\u06b8-\u06b9\u06bf\u06cf\u06d4\u06e9\u06ee-\u06ef\u06fa-\u0900\u0904\u093a-\u093b\u094e-\u0950\u0955-\u0957\u0964-\u0965\u0970-\u0980\u0984\u098d-\u098e\u0991-\u0992\u09a9\u09b1\u09b3-\u09b5\u09ba-\u09bb\u09bd\u09c5-\u09c6\u09c9-\u09ca\u09ce-\u09d6\u09d8-\u09db\u09de\u09e4-\u09e5\u09f2-\u0a01\u0a03-\u0a04\u0a0b-\u0a0e\u0a11-\u0a12\u0a29\u0a31\u0a34\u0a37\u0a3a-\u0a3b\u0a3d\u0a43-\u0a46\u0a49-\u0a4a\u0a4e-\u0a58\u0a5d\u0a5f-\u0a65\u0a75-\u0a80\u0a84\u0a8c\u0a8e\u0a92\u0aa9\u0ab1\u0ab4\u0aba-\u0abb\u0ac6\u0aca\u0ace-\u0adf\u0ae1-\u0ae5\u0af0-\u0b00\u0b04\u0b0d-\u0b0e\u0b11-\u0b12\u0b29\u0b31\u0b34-\u0b35\u0b3a-\u0b3b\u0b44-\u0b46\u0b49-\u0b4a\u0b4e-\u0b55\u0b58-\u0b5b\u0b5e\u0b62-\u0b65\u0b70-\u0b81\u0b84\u0b8b-\u0b8d\u0b91\u0b96-\u0b98\u0b9b\u0b9d\u0ba0-\u0ba2\u0ba5-\u0ba7\u0bab-\u0bad\u0bb6\u0bba-\u0bbd\u0bc3-\u0bc5\u0bc9\u0bce-\u0bd6\u0bd8-\u0be6\u0bf0-\u0c00\u0c04\u0c0d\u0c11\u0c29\u0c34\u0c3a-\u0c3d\u0c45\u0c49\u0c4e-\u0c54\u0c57-\u0c5f\u0c62-\u0c65\u0c70-\u0c81\u0c84\u0c8d\u0c91\u0ca9\u0cb4\u0cba-\u0cbd\u0cc5\u0cc9\u0cce-\u0cd4\u0cd7-\u0cdd\u0cdf\u0ce2-\u0ce5\u0cf0-\u0d01\u0d04\u0d0d\u0d11\u0d29\u0d3a-\u0d3d\u0d44-\u0d45\u0d49\u0d4e-\u0d56\u0d58-\u0d5f\u0d62-\u0d65\u0d70-\u0e00\u0e2f\u0e3b-\u0e3f\u0e4f\u0e5a-\u0e80\u0e83\u0e85-\u0e86\u0e89\u0e8b-\u0e8c\u0e8e-\u0e93\u0e98\u0ea0\u0ea4\u0ea6\u0ea8-\u0ea9\u0eac\u0eaf\u0eba\u0ebe-\u0ebf\u0ec5\u0ec7\u0ece-\u0ecf\u0eda-\u0f17\u0f1a-\u0f1f\u0f2a-\u0f34\u0f36\u0f38\u0f3a-\u0f3d\u0f48\u0f6a-\u0f70\u0f85\u0f8c-\u0f8f\u0f96\u0f98\u0fae-\u0fb0\u0fb8\u0fba-\u109f\u10c6-\u10cf\u10f7-\u10ff\u1101\u1104\u1108\u110a\u110d\u1113-\u113b\u113d\u113f\u1141-\u114b\u114d\u114f\u1151-\u1153\u1156-\u1158\u115a-\u115e\u1162\u1164\u1166\u1168\u116a-\u116c\u116f-\u1171\u1174\u1176-\u119d\u119f-\u11a7\u11a9-\u11aa\u11ac-\u11ad\u11b0-\u11b6\u11b9\u11bb\u11c3-\u11ea\u11ec-\u11ef\u11f1-\u11f8\u11fa-\u1dff\u1e9c-\u1e9f\u1efa-\u1eff\u1f16-\u1f17\u1f1e-\u1f1f\u1f46-\u1f47\u1f4e-\u1f4f\u1f58\u1f5a\u1f5c\u1f5e\u1f7e-\u1f7f\u1fb5\u1fbd\u1fbf-\u1fc1\u1fc5\u1fcd-\u1fcf\u1fd4-\u1fd5\u1fdc-\u1fdf\u1fed-\u1ff1\u1ff5\u1ffd-\u20cf\u20dd-\u20e0\u20e2-\u2125\u2127-\u2129\u212c-\u212d\u212f-\u217f\u2183-\u3004\u3006\u3008-\u3020\u3030\u3036-\u3040\u3095-\u3098\u309b-\u309c\u309f-\u30a0\u30fb\u30ff-\u3104\u312d-\u4dff\u9fa6-\uabff\ud7a4-\uffff]')  # noqa
+
+nonXmlNameFirstBMPRegexp = re.compile('[\x00-@\\[-\\^`\\{-\xbf\xd7\xf7\u0132-\u0133\u013f-\u0140\u0149\u017f\u01c4-\u01cc\u01f1-\u01f3\u01f6-\u01f9\u0218-\u024f\u02a9-\u02ba\u02c2-\u0385\u0387\u038b\u038d\u03a2\u03cf\u03d7-\u03d9\u03db\u03dd\u03df\u03e1\u03f4-\u0400\u040d\u0450\u045d\u0482-\u048f\u04c5-\u04c6\u04c9-\u04ca\u04cd-\u04cf\u04ec-\u04ed\u04f6-\u04f7\u04fa-\u0530\u0557-\u0558\u055a-\u0560\u0587-\u05cf\u05eb-\u05ef\u05f3-\u0620\u063b-\u0640\u064b-\u0670\u06b8-\u06b9\u06bf\u06cf\u06d4\u06d6-\u06e4\u06e7-\u0904\u093a-\u093c\u093e-\u0957\u0962-\u0984\u098d-\u098e\u0991-\u0992\u09a9\u09b1\u09b3-\u09b5\u09ba-\u09db\u09de\u09e2-\u09ef\u09f2-\u0a04\u0a0b-\u0a0e\u0a11-\u0a12\u0a29\u0a31\u0a34\u0a37\u0a3a-\u0a58\u0a5d\u0a5f-\u0a71\u0a75-\u0a84\u0a8c\u0a8e\u0a92\u0aa9\u0ab1\u0ab4\u0aba-\u0abc\u0abe-\u0adf\u0ae1-\u0b04\u0b0d-\u0b0e\u0b11-\u0b12\u0b29\u0b31\u0b34-\u0b35\u0b3a-\u0b3c\u0b3e-\u0b5b\u0b5e\u0b62-\u0b84\u0b8b-\u0b8d\u0b91\u0b96-\u0b98\u0b9b\u0b9d\u0ba0-\u0ba2\u0ba5-\u0ba7\u0bab-\u0bad\u0bb6\u0bba-\u0c04\u0c0d\u0c11\u0c29\u0c34\u0c3a-\u0c5f\u0c62-\u0c84\u0c8d\u0c91\u0ca9\u0cb4\u0cba-\u0cdd\u0cdf\u0ce2-\u0d04\u0d0d\u0d11\u0d29\u0d3a-\u0d5f\u0d62-\u0e00\u0e2f\u0e31\u0e34-\u0e3f\u0e46-\u0e80\u0e83\u0e85-\u0e86\u0e89\u0e8b-\u0e8c\u0e8e-\u0e93\u0e98\u0ea0\u0ea4\u0ea6\u0ea8-\u0ea9\u0eac\u0eaf\u0eb1\u0eb4-\u0ebc\u0ebe-\u0ebf\u0ec5-\u0f3f\u0f48\u0f6a-\u109f\u10c6-\u10cf\u10f7-\u10ff\u1101\u1104\u1108\u110a\u110d\u1113-\u113b\u113d\u113f\u1141-\u114b\u114d\u114f\u1151-\u1153\u1156-\u1158\u115a-\u115e\u1162\u1164\u1166\u1168\u116a-\u116c\u116f-\u1171\u1174\u1176-\u119d\u119f-\u11a7\u11a9-\u11aa\u11ac-\u11ad\u11b0-\u11b6\u11b9\u11bb\u11c3-\u11ea\u11ec-\u11ef\u11f1-\u11f8\u11fa-\u1dff\u1e9c-\u1e9f\u1efa-\u1eff\u1f16-\u1f17\u1f1e-\u1f1f\u1f46-\u1f47\u1f4e-\u1f4f\u1f58\u1f5a\u1f5c\u1f5e\u1f7e-\u1f7f\u1fb5\u1fbd\u1fbf-\u1fc1\u1fc5\u1fcd-\u1fcf\u1fd4-\u1fd5\u1fdc-\u1fdf\u1fed-\u1ff1\u1ff5\u1ffd-\u2125\u2127-\u2129\u212c-\u212d\u212f-\u217f\u2183-\u3006\u3008-\u3020\u302a-\u3040\u3095-\u30a0\u30fb-\u3104\u312d-\u4dff\u9fa6-\uabff\ud7a4-\uffff]')  # noqa
+
+# Simpler things
+nonPubidCharRegexp = re.compile("[^\x20\x0D\x0Aa-zA-Z0-9\\-'()+,./:=?;!*#@$_%]")
+
+
+class InfosetFilter(object):
+    replacementRegexp = re.compile(r"U[\dA-F]{5,5}")
+
+    def __init__(self,
+                 dropXmlnsLocalName=False,
+                 dropXmlnsAttrNs=False,
+                 preventDoubleDashComments=False,
+                 preventDashAtCommentEnd=False,
+                 replaceFormFeedCharacters=True,
+                 preventSingleQuotePubid=False):
+
+        self.dropXmlnsLocalName = dropXmlnsLocalName
+        self.dropXmlnsAttrNs = dropXmlnsAttrNs
+
+        self.preventDoubleDashComments = preventDoubleDashComments
+        self.preventDashAtCommentEnd = preventDashAtCommentEnd
+
+        self.replaceFormFeedCharacters = replaceFormFeedCharacters
+
+        self.preventSingleQuotePubid = preventSingleQuotePubid
+
+        self.replaceCache = {}
+
+    def coerceAttribute(self, name, namespace=None):
+        if self.dropXmlnsLocalName and name.startswith("xmlns:"):
+            warnings.warn("Attributes cannot begin with xmlns", DataLossWarning)
+            return None
+        elif (self.dropXmlnsAttrNs and
+              namespace == "http://www.w3.org/2000/xmlns/"):
+            warnings.warn("Attributes cannot be in the xml namespace", DataLossWarning)
+            return None
+        else:
+            return self.toXmlName(name)
+
+    def coerceElement(self, name):
+        return self.toXmlName(name)
+
+    def coerceComment(self, data):
+        if self.preventDoubleDashComments:
+            while "--" in data:
+                warnings.warn("Comments cannot contain adjacent dashes", DataLossWarning)
+                data = data.replace("--", "- -")
+            if data.endswith("-"):
+                warnings.warn("Comments cannot end in a dash", DataLossWarning)
+                data += " "
+        return data
+
+    def coerceCharacters(self, data):
+        if self.replaceFormFeedCharacters:
+            for _ in range(data.count("\x0C")):
+                warnings.warn("Text cannot contain U+000C", DataLossWarning)
+            data = data.replace("\x0C", " ")
+        # Other non-xml characters
+        return data
+
+    def coercePubid(self, data):
+        dataOutput = data
+        for char in nonPubidCharRegexp.findall(data):
+            warnings.warn("Coercing non-XML pubid", DataLossWarning)
+            replacement = self.getReplacementCharacter(char)
+            dataOutput = dataOutput.replace(char, replacement)
+        if self.preventSingleQuotePubid and dataOutput.find("'") >= 0:
+            warnings.warn("Pubid cannot contain single quote", DataLossWarning)
+            dataOutput = dataOutput.replace("'", self.getReplacementCharacter("'"))
+        return dataOutput
+
+    def toXmlName(self, name):
+        nameFirst = name[0]
+        nameRest = name[1:]
+        m = nonXmlNameFirstBMPRegexp.match(nameFirst)
+        if m:
+            warnings.warn("Coercing non-XML name: %s" % name, DataLossWarning)
+            nameFirstOutput = self.getReplacementCharacter(nameFirst)
+        else:
+            nameFirstOutput = nameFirst
+
+        nameRestOutput = nameRest
+        replaceChars = set(nonXmlNameBMPRegexp.findall(nameRest))
+        for char in replaceChars:
+            warnings.warn("Coercing non-XML name: %s" % name, DataLossWarning)
+            replacement = self.getReplacementCharacter(char)
+            nameRestOutput = nameRestOutput.replace(char, replacement)
+        return nameFirstOutput + nameRestOutput
+
+    def getReplacementCharacter(self, char):
+        if char in self.replaceCache:
+            replacement = self.replaceCache[char]
+        else:
+            replacement = self.escapeChar(char)
+        return replacement
+
+    def fromXmlName(self, name):
+        for item in set(self.replacementRegexp.findall(name)):
+            name = name.replace(item, self.unescapeChar(item))
+        return name
+
+    def escapeChar(self, char):
+        replacement = "U%05X" % ord(char)
+        self.replaceCache[char] = replacement
+        return replacement
+
+    def unescapeChar(self, charcode):
+        return chr(int(charcode[1:], 16))
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_inputstream.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_inputstream.py
new file mode 100644
index 0000000..e0bb376
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_inputstream.py
@@ -0,0 +1,918 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from pip._vendor.six import text_type
+from pip._vendor.six.moves import http_client, urllib
+
+import codecs
+import re
+from io import BytesIO, StringIO
+
+from pip._vendor import webencodings
+
+from .constants import EOF, spaceCharacters, asciiLetters, asciiUppercase
+from .constants import _ReparseException
+from . import _utils
+
+# Non-unicode versions of constants for use in the pre-parser
+spaceCharactersBytes = frozenset([item.encode("ascii") for item in spaceCharacters])
+asciiLettersBytes = frozenset([item.encode("ascii") for item in asciiLetters])
+asciiUppercaseBytes = frozenset([item.encode("ascii") for item in asciiUppercase])
+spacesAngleBrackets = spaceCharactersBytes | frozenset([b">", b"<"])
+
+
+invalid_unicode_no_surrogate = "[\u0001-\u0008\u000B\u000E-\u001F\u007F-\u009F\uFDD0-\uFDEF\uFFFE\uFFFF\U0001FFFE\U0001FFFF\U0002FFFE\U0002FFFF\U0003FFFE\U0003FFFF\U0004FFFE\U0004FFFF\U0005FFFE\U0005FFFF\U0006FFFE\U0006FFFF\U0007FFFE\U0007FFFF\U0008FFFE\U0008FFFF\U0009FFFE\U0009FFFF\U000AFFFE\U000AFFFF\U000BFFFE\U000BFFFF\U000CFFFE\U000CFFFF\U000DFFFE\U000DFFFF\U000EFFFE\U000EFFFF\U000FFFFE\U000FFFFF\U0010FFFE\U0010FFFF]"  # noqa
+
+if _utils.supports_lone_surrogates:
+    # Use one extra step of indirection and create surrogates with
+    # eval. Not using this indirection would introduce an illegal
+    # unicode literal on platforms not supporting such lone
+    # surrogates.
+    assert invalid_unicode_no_surrogate[-1] == "]" and invalid_unicode_no_surrogate.count("]") == 1
+    invalid_unicode_re = re.compile(invalid_unicode_no_surrogate[:-1] +
+                                    eval('"\\uD800-\\uDFFF"') +  # pylint:disable=eval-used
+                                    "]")
+else:
+    invalid_unicode_re = re.compile(invalid_unicode_no_surrogate)
+
+non_bmp_invalid_codepoints = {0x1FFFE, 0x1FFFF, 0x2FFFE, 0x2FFFF, 0x3FFFE,
+                              0x3FFFF, 0x4FFFE, 0x4FFFF, 0x5FFFE, 0x5FFFF,
+                              0x6FFFE, 0x6FFFF, 0x7FFFE, 0x7FFFF, 0x8FFFE,
+                              0x8FFFF, 0x9FFFE, 0x9FFFF, 0xAFFFE, 0xAFFFF,
+                              0xBFFFE, 0xBFFFF, 0xCFFFE, 0xCFFFF, 0xDFFFE,
+                              0xDFFFF, 0xEFFFE, 0xEFFFF, 0xFFFFE, 0xFFFFF,
+                              0x10FFFE, 0x10FFFF}
+
+ascii_punctuation_re = re.compile("[\u0009-\u000D\u0020-\u002F\u003A-\u0040\u005C\u005B-\u0060\u007B-\u007E]")
+
+# Cache for charsUntil()
+charsUntilRegEx = {}
+
+
+class BufferedStream(object):
+    """Buffering for streams that do not have buffering of their own
+
+    The buffer is implemented as a list of chunks on the assumption that
+    joining many strings will be slow since it is O(n**2)
+    """
+
+    def __init__(self, stream):
+        self.stream = stream
+        self.buffer = []
+        self.position = [-1, 0]  # chunk number, offset
+
+    def tell(self):
+        pos = 0
+        for chunk in self.buffer[:self.position[0]]:
+            pos += len(chunk)
+        pos += self.position[1]
+        return pos
+
+    def seek(self, pos):
+        assert pos <= self._bufferedBytes()
+        offset = pos
+        i = 0
+        while len(self.buffer[i]) < offset:
+            offset -= len(self.buffer[i])
+            i += 1
+        self.position = [i, offset]
+
+    def read(self, bytes):
+        if not self.buffer:
+            return self._readStream(bytes)
+        elif (self.position[0] == len(self.buffer) and
+              self.position[1] == len(self.buffer[-1])):
+            return self._readStream(bytes)
+        else:
+            return self._readFromBuffer(bytes)
+
+    def _bufferedBytes(self):
+        return sum([len(item) for item in self.buffer])
+
+    def _readStream(self, bytes):
+        data = self.stream.read(bytes)
+        self.buffer.append(data)
+        self.position[0] += 1
+        self.position[1] = len(data)
+        return data
+
+    def _readFromBuffer(self, bytes):
+        remainingBytes = bytes
+        rv = []
+        bufferIndex = self.position[0]
+        bufferOffset = self.position[1]
+        while bufferIndex < len(self.buffer) and remainingBytes != 0:
+            assert remainingBytes > 0
+            bufferedData = self.buffer[bufferIndex]
+
+            if remainingBytes <= len(bufferedData) - bufferOffset:
+                bytesToRead = remainingBytes
+                self.position = [bufferIndex, bufferOffset + bytesToRead]
+            else:
+                bytesToRead = len(bufferedData) - bufferOffset
+                self.position = [bufferIndex, len(bufferedData)]
+                bufferIndex += 1
+            rv.append(bufferedData[bufferOffset:bufferOffset + bytesToRead])
+            remainingBytes -= bytesToRead
+
+            bufferOffset = 0
+
+        if remainingBytes:
+            rv.append(self._readStream(remainingBytes))
+
+        return b"".join(rv)
+
+
+def HTMLInputStream(source, **kwargs):
+    # Work around Python bug #20007: read(0) closes the connection.
+    # http://bugs.python.org/issue20007
+    if (isinstance(source, http_client.HTTPResponse) or
+        # Also check for addinfourl wrapping HTTPResponse
+        (isinstance(source, urllib.response.addbase) and
+         isinstance(source.fp, http_client.HTTPResponse))):
+        isUnicode = False
+    elif hasattr(source, "read"):
+        isUnicode = isinstance(source.read(0), text_type)
+    else:
+        isUnicode = isinstance(source, text_type)
+
+    if isUnicode:
+        encodings = [x for x in kwargs if x.endswith("_encoding")]
+        if encodings:
+            raise TypeError("Cannot set an encoding with a unicode input, set %r" % encodings)
+
+        return HTMLUnicodeInputStream(source, **kwargs)
+    else:
+        return HTMLBinaryInputStream(source, **kwargs)
+
+
+class HTMLUnicodeInputStream(object):
+    """Provides a unicode stream of characters to the HTMLTokenizer.
+
+    This class takes care of character encoding and removing or replacing
+    incorrect byte-sequences and also provides column and line tracking.
+
+    """
+
+    _defaultChunkSize = 10240
+
+    def __init__(self, source):
+        """Initialises the HTMLInputStream.
+
+        HTMLInputStream(source, [encoding]) -> Normalized stream from source
+        for use by html5lib.
+
+        source can be either a file-object, local filename or a string.
+
+        The optional encoding parameter must be a string that indicates
+        the encoding.  If specified, that encoding will be used,
+        regardless of any BOM or later declaration (such as in a meta
+        element)
+
+        """
+
+        if not _utils.supports_lone_surrogates:
+            # Such platforms will have already checked for such
+            # surrogate errors, so no need to do this checking.
+            self.reportCharacterErrors = None
+        elif len("\U0010FFFF") == 1:
+            self.reportCharacterErrors = self.characterErrorsUCS4
+        else:
+            self.reportCharacterErrors = self.characterErrorsUCS2
+
+        # List of where new lines occur
+        self.newLines = [0]
+
+        self.charEncoding = (lookupEncoding("utf-8"), "certain")
+        self.dataStream = self.openStream(source)
+
+        self.reset()
+
+    def reset(self):
+        self.chunk = ""
+        self.chunkSize = 0
+        self.chunkOffset = 0
+        self.errors = []
+
+        # number of (complete) lines in previous chunks
+        self.prevNumLines = 0
+        # number of columns in the last line of the previous chunk
+        self.prevNumCols = 0
+
+        # Deal with CR LF and surrogates split over chunk boundaries
+        self._bufferedCharacter = None
+
+    def openStream(self, source):
+        """Produces a file object from source.
+
+        source can be either a file object, local filename or a string.
+
+        """
+        # Already a file object
+        if hasattr(source, 'read'):
+            stream = source
+        else:
+            stream = StringIO(source)
+
+        return stream
+
+    def _position(self, offset):
+        chunk = self.chunk
+        nLines = chunk.count('\n', 0, offset)
+        positionLine = self.prevNumLines + nLines
+        lastLinePos = chunk.rfind('\n', 0, offset)
+        if lastLinePos == -1:
+            positionColumn = self.prevNumCols + offset
+        else:
+            positionColumn = offset - (lastLinePos + 1)
+        return (positionLine, positionColumn)
+
+    def position(self):
+        """Returns (line, col) of the current position in the stream."""
+        line, col = self._position(self.chunkOffset)
+        return (line + 1, col)
+
+    def char(self):
+        """ Read one character from the stream or queue if available. Return
+            EOF when EOF is reached.
+        """
+        # Read a new chunk from the input stream if necessary
+        if self.chunkOffset >= self.chunkSize:
+            if not self.readChunk():
+                return EOF
+
+        chunkOffset = self.chunkOffset
+        char = self.chunk[chunkOffset]
+        self.chunkOffset = chunkOffset + 1
+
+        return char
+
+    def readChunk(self, chunkSize=None):
+        if chunkSize is None:
+            chunkSize = self._defaultChunkSize
+
+        self.prevNumLines, self.prevNumCols = self._position(self.chunkSize)
+
+        self.chunk = ""
+        self.chunkSize = 0
+        self.chunkOffset = 0
+
+        data = self.dataStream.read(chunkSize)
+
+        # Deal with CR LF and surrogates broken across chunks
+        if self._bufferedCharacter:
+            data = self._bufferedCharacter + data
+            self._bufferedCharacter = None
+        elif not data:
+            # We have no more data, bye-bye stream
+            return False
+
+        if len(data) > 1:
+            lastv = ord(data[-1])
+            if lastv == 0x0D or 0xD800 <= lastv <= 0xDBFF:
+                self._bufferedCharacter = data[-1]
+                data = data[:-1]
+
+        if self.reportCharacterErrors:
+            self.reportCharacterErrors(data)
+
+        # Replace invalid characters
+        data = data.replace("\r\n", "\n")
+        data = data.replace("\r", "\n")
+
+        self.chunk = data
+        self.chunkSize = len(data)
+
+        return True
+
+    def characterErrorsUCS4(self, data):
+        for _ in range(len(invalid_unicode_re.findall(data))):
+            self.errors.append("invalid-codepoint")
+
+    def characterErrorsUCS2(self, data):
+        # Someone picked the wrong compile option
+        # You lose
+        skip = False
+        for match in invalid_unicode_re.finditer(data):
+            if skip:
+                continue
+            codepoint = ord(match.group())
+            pos = match.start()
+            # Pretty sure there should be endianness issues here
+            if _utils.isSurrogatePair(data[pos:pos + 2]):
+                # We have a surrogate pair!
+                char_val = _utils.surrogatePairToCodepoint(data[pos:pos + 2])
+                if char_val in non_bmp_invalid_codepoints:
+                    self.errors.append("invalid-codepoint")
+                skip = True
+            elif (codepoint >= 0xD800 and codepoint <= 0xDFFF and
+                  pos == len(data) - 1):
+                self.errors.append("invalid-codepoint")
+            else:
+                skip = False
+                self.errors.append("invalid-codepoint")
+
+    def charsUntil(self, characters, opposite=False):
+        """ Returns a string of characters from the stream up to but not
+        including any character in 'characters' or EOF. 'characters' must be
+        a container that supports the 'in' method and iteration over its
+        characters.
+        """
+
+        # Use a cache of regexps to find the required characters
+        try:
+            chars = charsUntilRegEx[(characters, opposite)]
+        except KeyError:
+            if __debug__:
+                for c in characters:
+                    assert(ord(c) < 128)
+            regex = "".join(["\\x%02x" % ord(c) for c in characters])
+            if not opposite:
+                regex = "^%s" % regex
+            chars = charsUntilRegEx[(characters, opposite)] = re.compile("[%s]+" % regex)
+
+        rv = []
+
+        while True:
+            # Find the longest matching prefix
+            m = chars.match(self.chunk, self.chunkOffset)
+            if m is None:
+                # If nothing matched, and it wasn't because we ran out of chunk,
+                # then stop
+                if self.chunkOffset != self.chunkSize:
+                    break
+            else:
+                end = m.end()
+                # If not the whole chunk matched, return everything
+                # up to the part that didn't match
+                if end != self.chunkSize:
+                    rv.append(self.chunk[self.chunkOffset:end])
+                    self.chunkOffset = end
+                    break
+            # If the whole remainder of the chunk matched,
+            # use it all and read the next chunk
+            rv.append(self.chunk[self.chunkOffset:])
+            if not self.readChunk():
+                # Reached EOF
+                break
+
+        r = "".join(rv)
+        return r
+
+    def unget(self, char):
+        # Only one character is allowed to be ungotten at once - it must
+        # be consumed again before any further call to unget
+        if char is not EOF:
+            if self.chunkOffset == 0:
+                # unget is called quite rarely, so it's a good idea to do
+                # more work here if it saves a bit of work in the frequently
+                # called char and charsUntil.
+                # So, just prepend the ungotten character onto the current
+                # chunk:
+                self.chunk = char + self.chunk
+                self.chunkSize += 1
+            else:
+                self.chunkOffset -= 1
+                assert self.chunk[self.chunkOffset] == char
+
+
+class HTMLBinaryInputStream(HTMLUnicodeInputStream):
+    """Provides a unicode stream of characters to the HTMLTokenizer.
+
+    This class takes care of character encoding and removing or replacing
+    incorrect byte-sequences and also provides column and line tracking.
+
+    """
+
+    def __init__(self, source, override_encoding=None, transport_encoding=None,
+                 same_origin_parent_encoding=None, likely_encoding=None,
+                 default_encoding="windows-1252", useChardet=True):
+        """Initialises the HTMLInputStream.
+
+        HTMLInputStream(source, [encoding]) -> Normalized stream from source
+        for use by html5lib.
+
+        source can be either a file-object, local filename or a string.
+
+        The optional encoding parameter must be a string that indicates
+        the encoding.  If specified, that encoding will be used,
+        regardless of any BOM or later declaration (such as in a meta
+        element)
+
+        """
+        # Raw Stream - for unicode objects this will encode to utf-8 and set
+        #              self.charEncoding as appropriate
+        self.rawStream = self.openStream(source)
+
+        HTMLUnicodeInputStream.__init__(self, self.rawStream)
+
+        # Encoding Information
+        # Number of bytes to use when looking for a meta element with
+        # encoding information
+        self.numBytesMeta = 1024
+        # Number of bytes to use when using detecting encoding using chardet
+        self.numBytesChardet = 100
+        # Things from args
+        self.override_encoding = override_encoding
+        self.transport_encoding = transport_encoding
+        self.same_origin_parent_encoding = same_origin_parent_encoding
+        self.likely_encoding = likely_encoding
+        self.default_encoding = default_encoding
+
+        # Determine encoding
+        self.charEncoding = self.determineEncoding(useChardet)
+        assert self.charEncoding[0] is not None
+
+        # Call superclass
+        self.reset()
+
+    def reset(self):
+        self.dataStream = self.charEncoding[0].codec_info.streamreader(self.rawStream, 'replace')
+        HTMLUnicodeInputStream.reset(self)
+
+    def openStream(self, source):
+        """Produces a file object from source.
+
+        source can be either a file object, local filename or a string.
+
+        """
+        # Already a file object
+        if hasattr(source, 'read'):
+            stream = source
+        else:
+            stream = BytesIO(source)
+
+        try:
+            stream.seek(stream.tell())
+        except Exception:
+            stream = BufferedStream(stream)
+
+        return stream
+
+    def determineEncoding(self, chardet=True):
+        # BOMs take precedence over everything
+        # This will also read past the BOM if present
+        charEncoding = self.detectBOM(), "certain"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # If we've been overridden, we've been overridden
+        charEncoding = lookupEncoding(self.override_encoding), "certain"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # Now check the transport layer
+        charEncoding = lookupEncoding(self.transport_encoding), "certain"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # Look for meta elements with encoding information
+        charEncoding = self.detectEncodingMeta(), "tentative"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # Parent document encoding
+        charEncoding = lookupEncoding(self.same_origin_parent_encoding), "tentative"
+        if charEncoding[0] is not None and not charEncoding[0].name.startswith("utf-16"):
+            return charEncoding
+
+        # "likely" encoding
+        charEncoding = lookupEncoding(self.likely_encoding), "tentative"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # Guess with chardet, if available
+        if chardet:
+            try:
+                from pip._vendor.chardet.universaldetector import UniversalDetector
+            except ImportError:
+                pass
+            else:
+                buffers = []
+                detector = UniversalDetector()
+                while not detector.done:
+                    buffer = self.rawStream.read(self.numBytesChardet)
+                    assert isinstance(buffer, bytes)
+                    if not buffer:
+                        break
+                    buffers.append(buffer)
+                    detector.feed(buffer)
+                detector.close()
+                encoding = lookupEncoding(detector.result['encoding'])
+                self.rawStream.seek(0)
+                if encoding is not None:
+                    return encoding, "tentative"
+
+        # Try the default encoding
+        charEncoding = lookupEncoding(self.default_encoding), "tentative"
+        if charEncoding[0] is not None:
+            return charEncoding
+
+        # Fallback to html5lib's default if even that hasn't worked
+        return lookupEncoding("windows-1252"), "tentative"
+
+    def changeEncoding(self, newEncoding):
+        assert self.charEncoding[1] != "certain"
+        newEncoding = lookupEncoding(newEncoding)
+        if newEncoding is None:
+            return
+        if newEncoding.name in ("utf-16be", "utf-16le"):
+            newEncoding = lookupEncoding("utf-8")
+            assert newEncoding is not None
+        elif newEncoding == self.charEncoding[0]:
+            self.charEncoding = (self.charEncoding[0], "certain")
+        else:
+            self.rawStream.seek(0)
+            self.charEncoding = (newEncoding, "certain")
+            self.reset()
+            raise _ReparseException("Encoding changed from %s to %s" % (self.charEncoding[0], newEncoding))
+
+    def detectBOM(self):
+        """Attempts to detect at BOM at the start of the stream. If
+        an encoding can be determined from the BOM return the name of the
+        encoding otherwise return None"""
+        bomDict = {
+            codecs.BOM_UTF8: 'utf-8',
+            codecs.BOM_UTF16_LE: 'utf-16le', codecs.BOM_UTF16_BE: 'utf-16be',
+            codecs.BOM_UTF32_LE: 'utf-32le', codecs.BOM_UTF32_BE: 'utf-32be'
+        }
+
+        # Go to beginning of file and read in 4 bytes
+        string = self.rawStream.read(4)
+        assert isinstance(string, bytes)
+
+        # Try detecting the BOM using bytes from the string
+        encoding = bomDict.get(string[:3])         # UTF-8
+        seek = 3
+        if not encoding:
+            # Need to detect UTF-32 before UTF-16
+            encoding = bomDict.get(string)         # UTF-32
+            seek = 4
+            if not encoding:
+                encoding = bomDict.get(string[:2])  # UTF-16
+                seek = 2
+
+        # Set the read position past the BOM if one was found, otherwise
+        # set it to the start of the stream
+        if encoding:
+            self.rawStream.seek(seek)
+            return lookupEncoding(encoding)
+        else:
+            self.rawStream.seek(0)
+            return None
+
+    def detectEncodingMeta(self):
+        """Report the encoding declared by the meta element
+        """
+        buffer = self.rawStream.read(self.numBytesMeta)
+        assert isinstance(buffer, bytes)
+        parser = EncodingParser(buffer)
+        self.rawStream.seek(0)
+        encoding = parser.getEncoding()
+
+        if encoding is not None and encoding.name in ("utf-16be", "utf-16le"):
+            encoding = lookupEncoding("utf-8")
+
+        return encoding
+
+
+class EncodingBytes(bytes):
+    """String-like object with an associated position and various extra methods
+    If the position is ever greater than the string length then an exception is
+    raised"""
+    def __new__(self, value):
+        assert isinstance(value, bytes)
+        return bytes.__new__(self, value.lower())
+
+    def __init__(self, value):
+        # pylint:disable=unused-argument
+        self._position = -1
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        p = self._position = self._position + 1
+        if p >= len(self):
+            raise StopIteration
+        elif p < 0:
+            raise TypeError
+        return self[p:p + 1]
+
+    def next(self):
+        # Py2 compat
+        return self.__next__()
+
+    def previous(self):
+        p = self._position
+        if p >= len(self):
+            raise StopIteration
+        elif p < 0:
+            raise TypeError
+        self._position = p = p - 1
+        return self[p:p + 1]
+
+    def setPosition(self, position):
+        if self._position >= len(self):
+            raise StopIteration
+        self._position = position
+
+    def getPosition(self):
+        if self._position >= len(self):
+            raise StopIteration
+        if self._position >= 0:
+            return self._position
+        else:
+            return None
+
+    position = property(getPosition, setPosition)
+
+    def getCurrentByte(self):
+        return self[self.position:self.position + 1]
+
+    currentByte = property(getCurrentByte)
+
+    def skip(self, chars=spaceCharactersBytes):
+        """Skip past a list of characters"""
+        p = self.position               # use property for the error-checking
+        while p < len(self):
+            c = self[p:p + 1]
+            if c not in chars:
+                self._position = p
+                return c
+            p += 1
+        self._position = p
+        return None
+
+    def skipUntil(self, chars):
+        p = self.position
+        while p < len(self):
+            c = self[p:p + 1]
+            if c in chars:
+                self._position = p
+                return c
+            p += 1
+        self._position = p
+        return None
+
+    def matchBytes(self, bytes):
+        """Look for a sequence of bytes at the start of a string. If the bytes
+        are found return True and advance the position to the byte after the
+        match. Otherwise return False and leave the position alone"""
+        rv = self.startswith(bytes, self.position)
+        if rv:
+            self.position += len(bytes)
+        return rv
+
+    def jumpTo(self, bytes):
+        """Look for the next sequence of bytes matching a given sequence. If
+        a match is found advance the position to the last byte of the match"""
+        try:
+            self._position = self.index(bytes, self.position) + len(bytes) - 1
+        except ValueError:
+            raise StopIteration
+        return True
+
+
+class EncodingParser(object):
+    """Mini parser for detecting character encoding from meta elements"""
+
+    def __init__(self, data):
+        """string - the data to work on for encoding detection"""
+        self.data = EncodingBytes(data)
+        self.encoding = None
+
+    def getEncoding(self):
+        if b"<meta" not in self.data:
+            return None
+
+        methodDispatch = (
+            (b"<!--", self.handleComment),
+            (b"<meta", self.handleMeta),
+            (b"</", self.handlePossibleEndTag),
+            (b"<!", self.handleOther),
+            (b"<?", self.handleOther),
+            (b"<", self.handlePossibleStartTag))
+        for _ in self.data:
+            keepParsing = True
+            try:
+                self.data.jumpTo(b"<")
+            except StopIteration:
+                break
+            for key, method in methodDispatch:
+                if self.data.matchBytes(key):
+                    try:
+                        keepParsing = method()
+                        break
+                    except StopIteration:
+                        keepParsing = False
+                        break
+            if not keepParsing:
+                break
+
+        return self.encoding
+
+    def handleComment(self):
+        """Skip over comments"""
+        return self.data.jumpTo(b"-->")
+
+    def handleMeta(self):
+        if self.data.currentByte not in spaceCharactersBytes:
+            # if we have <meta not followed by a space so just keep going
+            return True
+        # We have a valid meta element we want to search for attributes
+        hasPragma = False
+        pendingEncoding = None
+        while True:
+            # Try to find the next attribute after the current position
+            attr = self.getAttribute()
+            if attr is None:
+                return True
+            else:
+                if attr[0] == b"http-equiv":
+                    hasPragma = attr[1] == b"content-type"
+                    if hasPragma and pendingEncoding is not None:
+                        self.encoding = pendingEncoding
+                        return False
+                elif attr[0] == b"charset":
+                    tentativeEncoding = attr[1]
+                    codec = lookupEncoding(tentativeEncoding)
+                    if codec is not None:
+                        self.encoding = codec
+                        return False
+                elif attr[0] == b"content":
+                    contentParser = ContentAttrParser(EncodingBytes(attr[1]))
+                    tentativeEncoding = contentParser.parse()
+                    if tentativeEncoding is not None:
+                        codec = lookupEncoding(tentativeEncoding)
+                        if codec is not None:
+                            if hasPragma:
+                                self.encoding = codec
+                                return False
+                            else:
+                                pendingEncoding = codec
+
+    def handlePossibleStartTag(self):
+        return self.handlePossibleTag(False)
+
+    def handlePossibleEndTag(self):
+        next(self.data)
+        return self.handlePossibleTag(True)
+
+    def handlePossibleTag(self, endTag):
+        data = self.data
+        if data.currentByte not in asciiLettersBytes:
+            # If the next byte is not an ascii letter either ignore this
+            # fragment (possible start tag case) or treat it according to
+            # handleOther
+            if endTag:
+                data.previous()
+                self.handleOther()
+            return True
+
+        c = data.skipUntil(spacesAngleBrackets)
+        if c == b"<":
+            # return to the first step in the overall "two step" algorithm
+            # reprocessing the < byte
+            data.previous()
+        else:
+            # Read all attributes
+            attr = self.getAttribute()
+            while attr is not None:
+                attr = self.getAttribute()
+        return True
+
+    def handleOther(self):
+        return self.data.jumpTo(b">")
+
+    def getAttribute(self):
+        """Return a name,value pair for the next attribute in the stream,
+        if one is found, or None"""
+        data = self.data
+        # Step 1 (skip chars)
+        c = data.skip(spaceCharactersBytes | frozenset([b"/"]))
+        assert c is None or len(c) == 1
+        # Step 2
+        if c in (b">", None):
+            return None
+        # Step 3
+        attrName = []
+        attrValue = []
+        # Step 4 attribute name
+        while True:
+            if c == b"=" and attrName:
+                break
+            elif c in spaceCharactersBytes:
+                # Step 6!
+                c = data.skip()
+                break
+            elif c in (b"/", b">"):
+                return b"".join(attrName), b""
+            elif c in asciiUppercaseBytes:
+                attrName.append(c.lower())
+            elif c is None:
+                return None
+            else:
+                attrName.append(c)
+            # Step 5
+            c = next(data)
+        # Step 7
+        if c != b"=":
+            data.previous()
+            return b"".join(attrName), b""
+        # Step 8
+        next(data)
+        # Step 9
+        c = data.skip()
+        # Step 10
+        if c in (b"'", b'"'):
+            # 10.1
+            quoteChar = c
+            while True:
+                # 10.2
+                c = next(data)
+                # 10.3
+                if c == quoteChar:
+                    next(data)
+                    return b"".join(attrName), b"".join(attrValue)
+                # 10.4
+                elif c in asciiUppercaseBytes:
+                    attrValue.append(c.lower())
+                # 10.5
+                else:
+                    attrValue.append(c)
+        elif c == b">":
+            return b"".join(attrName), b""
+        elif c in asciiUppercaseBytes:
+            attrValue.append(c.lower())
+        elif c is None:
+            return None
+        else:
+            attrValue.append(c)
+        # Step 11
+        while True:
+            c = next(data)
+            if c in spacesAngleBrackets:
+                return b"".join(attrName), b"".join(attrValue)
+            elif c in asciiUppercaseBytes:
+                attrValue.append(c.lower())
+            elif c is None:
+                return None
+            else:
+                attrValue.append(c)
+
+
+class ContentAttrParser(object):
+    def __init__(self, data):
+        assert isinstance(data, bytes)
+        self.data = data
+
+    def parse(self):
+        try:
+            # Check if the attr name is charset
+            # otherwise return
+            self.data.jumpTo(b"charset")
+            self.data.position += 1
+            self.data.skip()
+            if not self.data.currentByte == b"=":
+                # If there is no = sign keep looking for attrs
+                return None
+            self.data.position += 1
+            self.data.skip()
+            # Look for an encoding between matching quote marks
+            if self.data.currentByte in (b'"', b"'"):
+                quoteMark = self.data.currentByte
+                self.data.position += 1
+                oldPosition = self.data.position
+                if self.data.jumpTo(quoteMark):
+                    return self.data[oldPosition:self.data.position]
+                else:
+                    return None
+            else:
+                # Unquoted value
+                oldPosition = self.data.position
+                try:
+                    self.data.skipUntil(spaceCharactersBytes)
+                    return self.data[oldPosition:self.data.position]
+                except StopIteration:
+                    # Return the whole remaining value
+                    return self.data[oldPosition:]
+        except StopIteration:
+            return None
+
+
+def lookupEncoding(encoding):
+    """Return the python codec name corresponding to an encoding or None if the
+    string doesn't correspond to a valid encoding."""
+    if isinstance(encoding, bytes):
+        try:
+            encoding = encoding.decode("ascii")
+        except UnicodeDecodeError:
+            return None
+
+    if encoding is not None:
+        try:
+            return webencodings.lookup(encoding)
+        except AttributeError:
+            return None
+    else:
+        return None
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_tokenizer.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_tokenizer.py
new file mode 100644
index 0000000..5f00253
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_tokenizer.py
@@ -0,0 +1,1735 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from pip._vendor.six import unichr as chr
+
+from collections import deque, OrderedDict
+from sys import version_info
+
+from .constants import spaceCharacters
+from .constants import entities
+from .constants import asciiLetters, asciiUpper2Lower
+from .constants import digits, hexDigits, EOF
+from .constants import tokenTypes, tagTokenTypes
+from .constants import replacementCharacters
+
+from ._inputstream import HTMLInputStream
+
+from ._trie import Trie
+
+entitiesTrie = Trie(entities)
+
+if version_info >= (3, 7):
+    attributeMap = dict
+else:
+    attributeMap = OrderedDict
+
+
+class HTMLTokenizer(object):
+    """ This class takes care of tokenizing HTML.
+
+    * self.currentToken
+      Holds the token that is currently being processed.
+
+    * self.state
+      Holds a reference to the method to be invoked... XXX
+
+    * self.stream
+      Points to HTMLInputStream object.
+    """
+
+    def __init__(self, stream, parser=None, **kwargs):
+
+        self.stream = HTMLInputStream(stream, **kwargs)
+        self.parser = parser
+
+        # Setup the initial tokenizer state
+        self.escapeFlag = False
+        self.lastFourChars = []
+        self.state = self.dataState
+        self.escape = False
+
+        # The current token being created
+        self.currentToken = None
+        super(HTMLTokenizer, self).__init__()
+
+    def __iter__(self):
+        """ This is where the magic happens.
+
+        We do our usually processing through the states and when we have a token
+        to return we yield the token which pauses processing until the next token
+        is requested.
+        """
+        self.tokenQueue = deque([])
+        # Start processing. When EOF is reached self.state will return False
+        # instead of True and the loop will terminate.
+        while self.state():
+            while self.stream.errors:
+                yield {"type": tokenTypes["ParseError"], "data": self.stream.errors.pop(0)}
+            while self.tokenQueue:
+                yield self.tokenQueue.popleft()
+
+    def consumeNumberEntity(self, isHex):
+        """This function returns either U+FFFD or the character based on the
+        decimal or hexadecimal representation. It also discards ";" if present.
+        If not present self.tokenQueue.append({"type": tokenTypes["ParseError"]}) is invoked.
+        """
+
+        allowed = digits
+        radix = 10
+        if isHex:
+            allowed = hexDigits
+            radix = 16
+
+        charStack = []
+
+        # Consume all the characters that are in range while making sure we
+        # don't hit an EOF.
+        c = self.stream.char()
+        while c in allowed and c is not EOF:
+            charStack.append(c)
+            c = self.stream.char()
+
+        # Convert the set of characters consumed to an int.
+        charAsInt = int("".join(charStack), radix)
+
+        # Certain characters get replaced with others
+        if charAsInt in replacementCharacters:
+            char = replacementCharacters[charAsInt]
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "illegal-codepoint-for-numeric-entity",
+                                    "datavars": {"charAsInt": charAsInt}})
+        elif ((0xD800 <= charAsInt <= 0xDFFF) or
+              (charAsInt > 0x10FFFF)):
+            char = "\uFFFD"
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "illegal-codepoint-for-numeric-entity",
+                                    "datavars": {"charAsInt": charAsInt}})
+        else:
+            # Should speed up this check somehow (e.g. move the set to a constant)
+            if ((0x0001 <= charAsInt <= 0x0008) or
+                (0x000E <= charAsInt <= 0x001F) or
+                (0x007F <= charAsInt <= 0x009F) or
+                (0xFDD0 <= charAsInt <= 0xFDEF) or
+                charAsInt in frozenset([0x000B, 0xFFFE, 0xFFFF, 0x1FFFE,
+                                        0x1FFFF, 0x2FFFE, 0x2FFFF, 0x3FFFE,
+                                        0x3FFFF, 0x4FFFE, 0x4FFFF, 0x5FFFE,
+                                        0x5FFFF, 0x6FFFE, 0x6FFFF, 0x7FFFE,
+                                        0x7FFFF, 0x8FFFE, 0x8FFFF, 0x9FFFE,
+                                        0x9FFFF, 0xAFFFE, 0xAFFFF, 0xBFFFE,
+                                        0xBFFFF, 0xCFFFE, 0xCFFFF, 0xDFFFE,
+                                        0xDFFFF, 0xEFFFE, 0xEFFFF, 0xFFFFE,
+                                        0xFFFFF, 0x10FFFE, 0x10FFFF])):
+                self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                        "data":
+                                        "illegal-codepoint-for-numeric-entity",
+                                        "datavars": {"charAsInt": charAsInt}})
+            try:
+                # Try/except needed as UCS-2 Python builds' unichar only works
+                # within the BMP.
+                char = chr(charAsInt)
+            except ValueError:
+                v = charAsInt - 0x10000
+                char = chr(0xD800 | (v >> 10)) + chr(0xDC00 | (v & 0x3FF))
+
+        # Discard the ; if present. Otherwise, put it back on the queue and
+        # invoke parseError on parser.
+        if c != ";":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "numeric-entity-without-semicolon"})
+            self.stream.unget(c)
+
+        return char
+
+    def consumeEntity(self, allowedChar=None, fromAttribute=False):
+        # Initialise to the default output for when no entity is matched
+        output = "&"
+
+        charStack = [self.stream.char()]
+        if (charStack[0] in spaceCharacters or charStack[0] in (EOF, "<", "&") or
+                (allowedChar is not None and allowedChar == charStack[0])):
+            self.stream.unget(charStack[0])
+
+        elif charStack[0] == "#":
+            # Read the next character to see if it's hex or decimal
+            hex = False
+            charStack.append(self.stream.char())
+            if charStack[-1] in ("x", "X"):
+                hex = True
+                charStack.append(self.stream.char())
+
+            # charStack[-1] should be the first digit
+            if (hex and charStack[-1] in hexDigits) \
+                    or (not hex and charStack[-1] in digits):
+                # At least one digit found, so consume the whole number
+                self.stream.unget(charStack[-1])
+                output = self.consumeNumberEntity(hex)
+            else:
+                # No digits found
+                self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                        "data": "expected-numeric-entity"})
+                self.stream.unget(charStack.pop())
+                output = "&" + "".join(charStack)
+
+        else:
+            # At this point in the process might have named entity. Entities
+            # are stored in the global variable "entities".
+            #
+            # Consume characters and compare to these to a substring of the
+            # entity names in the list until the substring no longer matches.
+            while (charStack[-1] is not EOF):
+                if not entitiesTrie.has_keys_with_prefix("".join(charStack)):
+                    break
+                charStack.append(self.stream.char())
+
+            # At this point we have a string that starts with some characters
+            # that may match an entity
+            # Try to find the longest entity the string will match to take care
+            # of &noti for instance.
+            try:
+                entityName = entitiesTrie.longest_prefix("".join(charStack[:-1]))
+                entityLength = len(entityName)
+            except KeyError:
+                entityName = None
+
+            if entityName is not None:
+                if entityName[-1] != ";":
+                    self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                            "named-entity-without-semicolon"})
+                if (entityName[-1] != ";" and fromAttribute and
+                    (charStack[entityLength] in asciiLetters or
+                     charStack[entityLength] in digits or
+                     charStack[entityLength] == "=")):
+                    self.stream.unget(charStack.pop())
+                    output = "&" + "".join(charStack)
+                else:
+                    output = entities[entityName]
+                    self.stream.unget(charStack.pop())
+                    output += "".join(charStack[entityLength:])
+            else:
+                self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                        "expected-named-entity"})
+                self.stream.unget(charStack.pop())
+                output = "&" + "".join(charStack)
+
+        if fromAttribute:
+            self.currentToken["data"][-1][1] += output
+        else:
+            if output in spaceCharacters:
+                tokenType = "SpaceCharacters"
+            else:
+                tokenType = "Characters"
+            self.tokenQueue.append({"type": tokenTypes[tokenType], "data": output})
+
+    def processEntityInAttribute(self, allowedChar):
+        """This method replaces the need for "entityInAttributeValueState".
+        """
+        self.consumeEntity(allowedChar=allowedChar, fromAttribute=True)
+
+    def emitCurrentToken(self):
+        """This method is a generic handler for emitting the tags. It also sets
+        the state to "data" because that's what's needed after a token has been
+        emitted.
+        """
+        token = self.currentToken
+        # Add token to the queue to be yielded
+        if (token["type"] in tagTokenTypes):
+            token["name"] = token["name"].translate(asciiUpper2Lower)
+            if token["type"] == tokenTypes["StartTag"]:
+                raw = token["data"]
+                data = attributeMap(raw)
+                if len(raw) > len(data):
+                    # we had some duplicated attribute, fix so first wins
+                    data.update(raw[::-1])
+                token["data"] = data
+
+            if token["type"] == tokenTypes["EndTag"]:
+                if token["data"]:
+                    self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                            "data": "attributes-in-end-tag"})
+                if token["selfClosing"]:
+                    self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                            "data": "self-closing-flag-on-end-tag"})
+        self.tokenQueue.append(token)
+        self.state = self.dataState
+
+    # Below are the various tokenizer states worked out.
+    def dataState(self):
+        data = self.stream.char()
+        if data == "&":
+            self.state = self.entityDataState
+        elif data == "<":
+            self.state = self.tagOpenState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\u0000"})
+        elif data is EOF:
+            # Tokenization ends.
+            return False
+        elif data in spaceCharacters:
+            # Directly after emitting a token you switch back to the "data
+            # state". At that point spaceCharacters are important so they are
+            # emitted separately.
+            self.tokenQueue.append({"type": tokenTypes["SpaceCharacters"], "data":
+                                    data + self.stream.charsUntil(spaceCharacters, True)})
+            # No need to update lastFourChars here, since the first space will
+            # have already been appended to lastFourChars and will have broken
+            # any <!-- or --> sequences
+        else:
+            chars = self.stream.charsUntil(("&", "<", "\u0000"))
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + chars})
+        return True
+
+    def entityDataState(self):
+        self.consumeEntity()
+        self.state = self.dataState
+        return True
+
+    def rcdataState(self):
+        data = self.stream.char()
+        if data == "&":
+            self.state = self.characterReferenceInRcdata
+        elif data == "<":
+            self.state = self.rcdataLessThanSignState
+        elif data == EOF:
+            # Tokenization ends.
+            return False
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        elif data in spaceCharacters:
+            # Directly after emitting a token you switch back to the "data
+            # state". At that point spaceCharacters are important so they are
+            # emitted separately.
+            self.tokenQueue.append({"type": tokenTypes["SpaceCharacters"], "data":
+                                    data + self.stream.charsUntil(spaceCharacters, True)})
+            # No need to update lastFourChars here, since the first space will
+            # have already been appended to lastFourChars and will have broken
+            # any <!-- or --> sequences
+        else:
+            chars = self.stream.charsUntil(("&", "<", "\u0000"))
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + chars})
+        return True
+
+    def characterReferenceInRcdata(self):
+        self.consumeEntity()
+        self.state = self.rcdataState
+        return True
+
+    def rawtextState(self):
+        data = self.stream.char()
+        if data == "<":
+            self.state = self.rawtextLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        elif data == EOF:
+            # Tokenization ends.
+            return False
+        else:
+            chars = self.stream.charsUntil(("<", "\u0000"))
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + chars})
+        return True
+
+    def scriptDataState(self):
+        data = self.stream.char()
+        if data == "<":
+            self.state = self.scriptDataLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        elif data == EOF:
+            # Tokenization ends.
+            return False
+        else:
+            chars = self.stream.charsUntil(("<", "\u0000"))
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + chars})
+        return True
+
+    def plaintextState(self):
+        data = self.stream.char()
+        if data == EOF:
+            # Tokenization ends.
+            return False
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + self.stream.charsUntil("\u0000")})
+        return True
+
+    def tagOpenState(self):
+        data = self.stream.char()
+        if data == "!":
+            self.state = self.markupDeclarationOpenState
+        elif data == "/":
+            self.state = self.closeTagOpenState
+        elif data in asciiLetters:
+            self.currentToken = {"type": tokenTypes["StartTag"],
+                                 "name": data, "data": [],
+                                 "selfClosing": False,
+                                 "selfClosingAcknowledged": False}
+            self.state = self.tagNameState
+        elif data == ">":
+            # XXX In theory it could be something besides a tag name. But
+            # do we really care?
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-tag-name-but-got-right-bracket"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<>"})
+            self.state = self.dataState
+        elif data == "?":
+            # XXX In theory it could be something besides a tag name. But
+            # do we really care?
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-tag-name-but-got-question-mark"})
+            self.stream.unget(data)
+            self.state = self.bogusCommentState
+        else:
+            # XXX
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-tag-name"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.stream.unget(data)
+            self.state = self.dataState
+        return True
+
+    def closeTagOpenState(self):
+        data = self.stream.char()
+        if data in asciiLetters:
+            self.currentToken = {"type": tokenTypes["EndTag"], "name": data,
+                                 "data": [], "selfClosing": False}
+            self.state = self.tagNameState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-closing-tag-but-got-right-bracket"})
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-closing-tag-but-got-eof"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
+            self.state = self.dataState
+        else:
+            # XXX data can be _'_...
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-closing-tag-but-got-char",
+                                    "datavars": {"data": data}})
+            self.stream.unget(data)
+            self.state = self.bogusCommentState
+        return True
+
+    def tagNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeAttributeNameState
+        elif data == ">":
+            self.emitCurrentToken()
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-tag-name"})
+            self.state = self.dataState
+        elif data == "/":
+            self.state = self.selfClosingStartTagState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["name"] += "\uFFFD"
+        else:
+            self.currentToken["name"] += data
+            # (Don't use charsUntil here, because tag names are
+            # very short and it's faster to not do anything fancy)
+        return True
+
+    def rcdataLessThanSignState(self):
+        data = self.stream.char()
+        if data == "/":
+            self.temporaryBuffer = ""
+            self.state = self.rcdataEndTagOpenState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.stream.unget(data)
+            self.state = self.rcdataState
+        return True
+
+    def rcdataEndTagOpenState(self):
+        data = self.stream.char()
+        if data in asciiLetters:
+            self.temporaryBuffer += data
+            self.state = self.rcdataEndTagNameState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
+            self.stream.unget(data)
+            self.state = self.rcdataState
+        return True
+
+    def rcdataEndTagNameState(self):
+        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
+        data = self.stream.char()
+        if data in spaceCharacters and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.beforeAttributeNameState
+        elif data == "/" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.selfClosingStartTagState
+        elif data == ">" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.emitCurrentToken()
+            self.state = self.dataState
+        elif data in asciiLetters:
+            self.temporaryBuffer += data
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "</" + self.temporaryBuffer})
+            self.stream.unget(data)
+            self.state = self.rcdataState
+        return True
+
+    def rawtextLessThanSignState(self):
+        data = self.stream.char()
+        if data == "/":
+            self.temporaryBuffer = ""
+            self.state = self.rawtextEndTagOpenState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.stream.unget(data)
+            self.state = self.rawtextState
+        return True
+
+    def rawtextEndTagOpenState(self):
+        data = self.stream.char()
+        if data in asciiLetters:
+            self.temporaryBuffer += data
+            self.state = self.rawtextEndTagNameState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
+            self.stream.unget(data)
+            self.state = self.rawtextState
+        return True
+
+    def rawtextEndTagNameState(self):
+        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
+        data = self.stream.char()
+        if data in spaceCharacters and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.beforeAttributeNameState
+        elif data == "/" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.selfClosingStartTagState
+        elif data == ">" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.emitCurrentToken()
+            self.state = self.dataState
+        elif data in asciiLetters:
+            self.temporaryBuffer += data
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "</" + self.temporaryBuffer})
+            self.stream.unget(data)
+            self.state = self.rawtextState
+        return True
+
+    def scriptDataLessThanSignState(self):
+        data = self.stream.char()
+        if data == "/":
+            self.temporaryBuffer = ""
+            self.state = self.scriptDataEndTagOpenState
+        elif data == "!":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<!"})
+            self.state = self.scriptDataEscapeStartState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.stream.unget(data)
+            self.state = self.scriptDataState
+        return True
+
+    def scriptDataEndTagOpenState(self):
+        data = self.stream.char()
+        if data in asciiLetters:
+            self.temporaryBuffer += data
+            self.state = self.scriptDataEndTagNameState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
+            self.stream.unget(data)
+            self.state = self.scriptDataState
+        return True
+
+    def scriptDataEndTagNameState(self):
+        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
+        data = self.stream.char()
+        if data in spaceCharacters and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.beforeAttributeNameState
+        elif data == "/" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.selfClosingStartTagState
+        elif data == ">" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.emitCurrentToken()
+            self.state = self.dataState
+        elif data in asciiLetters:
+            self.temporaryBuffer += data
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "</" + self.temporaryBuffer})
+            self.stream.unget(data)
+            self.state = self.scriptDataState
+        return True
+
+    def scriptDataEscapeStartState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataEscapeStartDashState
+        else:
+            self.stream.unget(data)
+            self.state = self.scriptDataState
+        return True
+
+    def scriptDataEscapeStartDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataEscapedDashDashState
+        else:
+            self.stream.unget(data)
+            self.state = self.scriptDataState
+        return True
+
+    def scriptDataEscapedState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataEscapedDashState
+        elif data == "<":
+            self.state = self.scriptDataEscapedLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        elif data == EOF:
+            self.state = self.dataState
+        else:
+            chars = self.stream.charsUntil(("<", "-", "\u0000"))
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
+                                    data + chars})
+        return True
+
+    def scriptDataEscapedDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataEscapedDashDashState
+        elif data == "<":
+            self.state = self.scriptDataEscapedLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+            self.state = self.scriptDataEscapedState
+        elif data == EOF:
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataEscapedDashDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+        elif data == "<":
+            self.state = self.scriptDataEscapedLessThanSignState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": ">"})
+            self.state = self.scriptDataState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+            self.state = self.scriptDataEscapedState
+        elif data == EOF:
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataEscapedLessThanSignState(self):
+        data = self.stream.char()
+        if data == "/":
+            self.temporaryBuffer = ""
+            self.state = self.scriptDataEscapedEndTagOpenState
+        elif data in asciiLetters:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<" + data})
+            self.temporaryBuffer = data
+            self.state = self.scriptDataDoubleEscapeStartState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.stream.unget(data)
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataEscapedEndTagOpenState(self):
+        data = self.stream.char()
+        if data in asciiLetters:
+            self.temporaryBuffer = data
+            self.state = self.scriptDataEscapedEndTagNameState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
+            self.stream.unget(data)
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataEscapedEndTagNameState(self):
+        appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
+        data = self.stream.char()
+        if data in spaceCharacters and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.beforeAttributeNameState
+        elif data == "/" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.state = self.selfClosingStartTagState
+        elif data == ">" and appropriate:
+            self.currentToken = {"type": tokenTypes["EndTag"],
+                                 "name": self.temporaryBuffer,
+                                 "data": [], "selfClosing": False}
+            self.emitCurrentToken()
+            self.state = self.dataState
+        elif data in asciiLetters:
+            self.temporaryBuffer += data
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "</" + self.temporaryBuffer})
+            self.stream.unget(data)
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataDoubleEscapeStartState(self):
+        data = self.stream.char()
+        if data in (spaceCharacters | frozenset(("/", ">"))):
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            if self.temporaryBuffer.lower() == "script":
+                self.state = self.scriptDataDoubleEscapedState
+            else:
+                self.state = self.scriptDataEscapedState
+        elif data in asciiLetters:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.temporaryBuffer += data
+        else:
+            self.stream.unget(data)
+            self.state = self.scriptDataEscapedState
+        return True
+
+    def scriptDataDoubleEscapedState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataDoubleEscapedDashState
+        elif data == "<":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.state = self.scriptDataDoubleEscapedLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+        elif data == EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-script-in-script"})
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+        return True
+
+    def scriptDataDoubleEscapedDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+            self.state = self.scriptDataDoubleEscapedDashDashState
+        elif data == "<":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.state = self.scriptDataDoubleEscapedLessThanSignState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+            self.state = self.scriptDataDoubleEscapedState
+        elif data == EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-script-in-script"})
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.state = self.scriptDataDoubleEscapedState
+        return True
+
+    def scriptDataDoubleEscapedDashDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
+        elif data == "<":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
+            self.state = self.scriptDataDoubleEscapedLessThanSignState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": ">"})
+            self.state = self.scriptDataState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": "\uFFFD"})
+            self.state = self.scriptDataDoubleEscapedState
+        elif data == EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-script-in-script"})
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.state = self.scriptDataDoubleEscapedState
+        return True
+
+    def scriptDataDoubleEscapedLessThanSignState(self):
+        data = self.stream.char()
+        if data == "/":
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "/"})
+            self.temporaryBuffer = ""
+            self.state = self.scriptDataDoubleEscapeEndState
+        else:
+            self.stream.unget(data)
+            self.state = self.scriptDataDoubleEscapedState
+        return True
+
+    def scriptDataDoubleEscapeEndState(self):
+        data = self.stream.char()
+        if data in (spaceCharacters | frozenset(("/", ">"))):
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            if self.temporaryBuffer.lower() == "script":
+                self.state = self.scriptDataEscapedState
+            else:
+                self.state = self.scriptDataDoubleEscapedState
+        elif data in asciiLetters:
+            self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
+            self.temporaryBuffer += data
+        else:
+            self.stream.unget(data)
+            self.state = self.scriptDataDoubleEscapedState
+        return True
+
+    def beforeAttributeNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.stream.charsUntil(spaceCharacters, True)
+        elif data in asciiLetters:
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        elif data == ">":
+            self.emitCurrentToken()
+        elif data == "/":
+            self.state = self.selfClosingStartTagState
+        elif data in ("'", '"', "=", "<"):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "invalid-character-in-attribute-name"})
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"].append(["\uFFFD", ""])
+            self.state = self.attributeNameState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-attribute-name-but-got-eof"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        return True
+
+    def attributeNameState(self):
+        data = self.stream.char()
+        leavingThisState = True
+        emitToken = False
+        if data == "=":
+            self.state = self.beforeAttributeValueState
+        elif data in asciiLetters:
+            self.currentToken["data"][-1][0] += data +\
+                self.stream.charsUntil(asciiLetters, True)
+            leavingThisState = False
+        elif data == ">":
+            # XXX If we emit here the attributes are converted to a dict
+            # without being checked and when the code below runs we error
+            # because data is a dict not a list
+            emitToken = True
+        elif data in spaceCharacters:
+            self.state = self.afterAttributeNameState
+        elif data == "/":
+            self.state = self.selfClosingStartTagState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"][-1][0] += "\uFFFD"
+            leavingThisState = False
+        elif data in ("'", '"', "<"):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data":
+                                    "invalid-character-in-attribute-name"})
+            self.currentToken["data"][-1][0] += data
+            leavingThisState = False
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "eof-in-attribute-name"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"][-1][0] += data
+            leavingThisState = False
+
+        if leavingThisState:
+            # Attributes are not dropped at this stage. That happens when the
+            # start tag token is emitted so values can still be safely appended
+            # to attributes, but we do want to report the parse error in time.
+            self.currentToken["data"][-1][0] = (
+                self.currentToken["data"][-1][0].translate(asciiUpper2Lower))
+            for name, _ in self.currentToken["data"][:-1]:
+                if self.currentToken["data"][-1][0] == name:
+                    self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                            "duplicate-attribute"})
+                    break
+            # XXX Fix for above XXX
+            if emitToken:
+                self.emitCurrentToken()
+        return True
+
+    def afterAttributeNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.stream.charsUntil(spaceCharacters, True)
+        elif data == "=":
+            self.state = self.beforeAttributeValueState
+        elif data == ">":
+            self.emitCurrentToken()
+        elif data in asciiLetters:
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        elif data == "/":
+            self.state = self.selfClosingStartTagState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"].append(["\uFFFD", ""])
+            self.state = self.attributeNameState
+        elif data in ("'", '"', "<"):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "invalid-character-after-attribute-name"})
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-end-of-tag-but-got-eof"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"].append([data, ""])
+            self.state = self.attributeNameState
+        return True
+
+    def beforeAttributeValueState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.stream.charsUntil(spaceCharacters, True)
+        elif data == "\"":
+            self.state = self.attributeValueDoubleQuotedState
+        elif data == "&":
+            self.state = self.attributeValueUnQuotedState
+            self.stream.unget(data)
+        elif data == "'":
+            self.state = self.attributeValueSingleQuotedState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-attribute-value-but-got-right-bracket"})
+            self.emitCurrentToken()
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"][-1][1] += "\uFFFD"
+            self.state = self.attributeValueUnQuotedState
+        elif data in ("=", "<", "`"):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "equals-in-unquoted-attribute-value"})
+            self.currentToken["data"][-1][1] += data
+            self.state = self.attributeValueUnQuotedState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-attribute-value-but-got-eof"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"][-1][1] += data
+            self.state = self.attributeValueUnQuotedState
+        return True
+
+    def attributeValueDoubleQuotedState(self):
+        data = self.stream.char()
+        if data == "\"":
+            self.state = self.afterAttributeValueState
+        elif data == "&":
+            self.processEntityInAttribute('"')
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"][-1][1] += "\uFFFD"
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-attribute-value-double-quote"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"][-1][1] += data +\
+                self.stream.charsUntil(("\"", "&", "\u0000"))
+        return True
+
+    def attributeValueSingleQuotedState(self):
+        data = self.stream.char()
+        if data == "'":
+            self.state = self.afterAttributeValueState
+        elif data == "&":
+            self.processEntityInAttribute("'")
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"][-1][1] += "\uFFFD"
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-attribute-value-single-quote"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"][-1][1] += data +\
+                self.stream.charsUntil(("'", "&", "\u0000"))
+        return True
+
+    def attributeValueUnQuotedState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeAttributeNameState
+        elif data == "&":
+            self.processEntityInAttribute(">")
+        elif data == ">":
+            self.emitCurrentToken()
+        elif data in ('"', "'", "=", "<", "`"):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-character-in-unquoted-attribute-value"})
+            self.currentToken["data"][-1][1] += data
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"][-1][1] += "\uFFFD"
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-attribute-value-no-quotes"})
+            self.state = self.dataState
+        else:
+            self.currentToken["data"][-1][1] += data + self.stream.charsUntil(
+                frozenset(("&", ">", '"', "'", "=", "<", "`", "\u0000")) | spaceCharacters)
+        return True
+
+    def afterAttributeValueState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeAttributeNameState
+        elif data == ">":
+            self.emitCurrentToken()
+        elif data == "/":
+            self.state = self.selfClosingStartTagState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-EOF-after-attribute-value"})
+            self.stream.unget(data)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-character-after-attribute-value"})
+            self.stream.unget(data)
+            self.state = self.beforeAttributeNameState
+        return True
+
+    def selfClosingStartTagState(self):
+        data = self.stream.char()
+        if data == ">":
+            self.currentToken["selfClosing"] = True
+            self.emitCurrentToken()
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data":
+                                    "unexpected-EOF-after-solidus-in-tag"})
+            self.stream.unget(data)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-character-after-solidus-in-tag"})
+            self.stream.unget(data)
+            self.state = self.beforeAttributeNameState
+        return True
+
+    def bogusCommentState(self):
+        # Make a new comment token and give it as value all the characters
+        # until the first > or EOF (charsUntil checks for EOF automatically)
+        # and emit it.
+        data = self.stream.charsUntil(">")
+        data = data.replace("\u0000", "\uFFFD")
+        self.tokenQueue.append(
+            {"type": tokenTypes["Comment"], "data": data})
+
+        # Eat the character directly after the bogus comment which is either a
+        # ">" or an EOF.
+        self.stream.char()
+        self.state = self.dataState
+        return True
+
+    def markupDeclarationOpenState(self):
+        charStack = [self.stream.char()]
+        if charStack[-1] == "-":
+            charStack.append(self.stream.char())
+            if charStack[-1] == "-":
+                self.currentToken = {"type": tokenTypes["Comment"], "data": ""}
+                self.state = self.commentStartState
+                return True
+        elif charStack[-1] in ('d', 'D'):
+            matched = True
+            for expected in (('o', 'O'), ('c', 'C'), ('t', 'T'),
+                             ('y', 'Y'), ('p', 'P'), ('e', 'E')):
+                charStack.append(self.stream.char())
+                if charStack[-1] not in expected:
+                    matched = False
+                    break
+            if matched:
+                self.currentToken = {"type": tokenTypes["Doctype"],
+                                     "name": "",
+                                     "publicId": None, "systemId": None,
+                                     "correct": True}
+                self.state = self.doctypeState
+                return True
+        elif (charStack[-1] == "[" and
+              self.parser is not None and
+              self.parser.tree.openElements and
+              self.parser.tree.openElements[-1].namespace != self.parser.tree.defaultNamespace):
+            matched = True
+            for expected in ["C", "D", "A", "T", "A", "["]:
+                charStack.append(self.stream.char())
+                if charStack[-1] != expected:
+                    matched = False
+                    break
+            if matched:
+                self.state = self.cdataSectionState
+                return True
+
+        self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                "expected-dashes-or-doctype"})
+
+        while charStack:
+            self.stream.unget(charStack.pop())
+        self.state = self.bogusCommentState
+        return True
+
+    def commentStartState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.state = self.commentStartDashState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "incorrect-comment"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-comment"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["data"] += data
+            self.state = self.commentState
+        return True
+
+    def commentStartDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.state = self.commentEndState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "-\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "incorrect-comment"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-comment"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["data"] += "-" + data
+            self.state = self.commentState
+        return True
+
+    def commentState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.state = self.commentEndDashState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "\uFFFD"
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "eof-in-comment"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["data"] += data + \
+                self.stream.charsUntil(("-", "\u0000"))
+        return True
+
+    def commentEndDashState(self):
+        data = self.stream.char()
+        if data == "-":
+            self.state = self.commentEndState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "-\uFFFD"
+            self.state = self.commentState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-comment-end-dash"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["data"] += "-" + data
+            self.state = self.commentState
+        return True
+
+    def commentEndState(self):
+        data = self.stream.char()
+        if data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "--\uFFFD"
+            self.state = self.commentState
+        elif data == "!":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-bang-after-double-dash-in-comment"})
+            self.state = self.commentEndBangState
+        elif data == "-":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-dash-after-double-dash-in-comment"})
+            self.currentToken["data"] += data
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-comment-double-dash"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            # XXX
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-comment"})
+            self.currentToken["data"] += "--" + data
+            self.state = self.commentState
+        return True
+
+    def commentEndBangState(self):
+        data = self.stream.char()
+        if data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == "-":
+            self.currentToken["data"] += "--!"
+            self.state = self.commentEndDashState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["data"] += "--!\uFFFD"
+            self.state = self.commentState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-comment-end-bang-state"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["data"] += "--!" + data
+            self.state = self.commentState
+        return True
+
+    def doctypeState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeDoctypeNameState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-doctype-name-but-got-eof"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "need-space-after-doctype"})
+            self.stream.unget(data)
+            self.state = self.beforeDoctypeNameState
+        return True
+
+    def beforeDoctypeNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-doctype-name-but-got-right-bracket"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["name"] = "\uFFFD"
+            self.state = self.doctypeNameState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-doctype-name-but-got-eof"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["name"] = data
+            self.state = self.doctypeNameState
+        return True
+
+    def doctypeNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.currentToken["name"] = self.currentToken["name"].translate(asciiUpper2Lower)
+            self.state = self.afterDoctypeNameState
+        elif data == ">":
+            self.currentToken["name"] = self.currentToken["name"].translate(asciiUpper2Lower)
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["name"] += "\uFFFD"
+            self.state = self.doctypeNameState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype-name"})
+            self.currentToken["correct"] = False
+            self.currentToken["name"] = self.currentToken["name"].translate(asciiUpper2Lower)
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["name"] += data
+        return True
+
+    def afterDoctypeNameState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.currentToken["correct"] = False
+            self.stream.unget(data)
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            if data in ("p", "P"):
+                matched = True
+                for expected in (("u", "U"), ("b", "B"), ("l", "L"),
+                                 ("i", "I"), ("c", "C")):
+                    data = self.stream.char()
+                    if data not in expected:
+                        matched = False
+                        break
+                if matched:
+                    self.state = self.afterDoctypePublicKeywordState
+                    return True
+            elif data in ("s", "S"):
+                matched = True
+                for expected in (("y", "Y"), ("s", "S"), ("t", "T"),
+                                 ("e", "E"), ("m", "M")):
+                    data = self.stream.char()
+                    if data not in expected:
+                        matched = False
+                        break
+                if matched:
+                    self.state = self.afterDoctypeSystemKeywordState
+                    return True
+
+            # All the characters read before the current 'data' will be
+            # [a-zA-Z], so they're garbage in the bogus doctype and can be
+            # discarded; only the latest character might be '>' or EOF
+            # and needs to be ungetted
+            self.stream.unget(data)
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "expected-space-or-right-bracket-in-doctype", "datavars":
+                                    {"data": data}})
+            self.currentToken["correct"] = False
+            self.state = self.bogusDoctypeState
+
+        return True
+
+    def afterDoctypePublicKeywordState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeDoctypePublicIdentifierState
+        elif data in ("'", '"'):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.stream.unget(data)
+            self.state = self.beforeDoctypePublicIdentifierState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.stream.unget(data)
+            self.state = self.beforeDoctypePublicIdentifierState
+        return True
+
+    def beforeDoctypePublicIdentifierState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == "\"":
+            self.currentToken["publicId"] = ""
+            self.state = self.doctypePublicIdentifierDoubleQuotedState
+        elif data == "'":
+            self.currentToken["publicId"] = ""
+            self.state = self.doctypePublicIdentifierSingleQuotedState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-end-of-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["correct"] = False
+            self.state = self.bogusDoctypeState
+        return True
+
+    def doctypePublicIdentifierDoubleQuotedState(self):
+        data = self.stream.char()
+        if data == "\"":
+            self.state = self.afterDoctypePublicIdentifierState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["publicId"] += "\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-end-of-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["publicId"] += data
+        return True
+
+    def doctypePublicIdentifierSingleQuotedState(self):
+        data = self.stream.char()
+        if data == "'":
+            self.state = self.afterDoctypePublicIdentifierState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["publicId"] += "\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-end-of-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["publicId"] += data
+        return True
+
+    def afterDoctypePublicIdentifierState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.betweenDoctypePublicAndSystemIdentifiersState
+        elif data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == '"':
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierDoubleQuotedState
+        elif data == "'":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierSingleQuotedState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["correct"] = False
+            self.state = self.bogusDoctypeState
+        return True
+
+    def betweenDoctypePublicAndSystemIdentifiersState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data == '"':
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierDoubleQuotedState
+        elif data == "'":
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierSingleQuotedState
+        elif data == EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["correct"] = False
+            self.state = self.bogusDoctypeState
+        return True
+
+    def afterDoctypeSystemKeywordState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            self.state = self.beforeDoctypeSystemIdentifierState
+        elif data in ("'", '"'):
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.stream.unget(data)
+            self.state = self.beforeDoctypeSystemIdentifierState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.stream.unget(data)
+            self.state = self.beforeDoctypeSystemIdentifierState
+        return True
+
+    def beforeDoctypeSystemIdentifierState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == "\"":
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierDoubleQuotedState
+        elif data == "'":
+            self.currentToken["systemId"] = ""
+            self.state = self.doctypeSystemIdentifierSingleQuotedState
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.currentToken["correct"] = False
+            self.state = self.bogusDoctypeState
+        return True
+
+    def doctypeSystemIdentifierDoubleQuotedState(self):
+        data = self.stream.char()
+        if data == "\"":
+            self.state = self.afterDoctypeSystemIdentifierState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["systemId"] += "\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-end-of-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["systemId"] += data
+        return True
+
+    def doctypeSystemIdentifierSingleQuotedState(self):
+        data = self.stream.char()
+        if data == "'":
+            self.state = self.afterDoctypeSystemIdentifierState
+        elif data == "\u0000":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                    "data": "invalid-codepoint"})
+            self.currentToken["systemId"] += "\uFFFD"
+        elif data == ">":
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-end-of-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.currentToken["systemId"] += data
+        return True
+
+    def afterDoctypeSystemIdentifierState(self):
+        data = self.stream.char()
+        if data in spaceCharacters:
+            pass
+        elif data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "eof-in-doctype"})
+            self.currentToken["correct"] = False
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
+                                    "unexpected-char-in-doctype"})
+            self.state = self.bogusDoctypeState
+        return True
+
+    def bogusDoctypeState(self):
+        data = self.stream.char()
+        if data == ">":
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        elif data is EOF:
+            # XXX EMIT
+            self.stream.unget(data)
+            self.tokenQueue.append(self.currentToken)
+            self.state = self.dataState
+        else:
+            pass
+        return True
+
+    def cdataSectionState(self):
+        data = []
+        while True:
+            data.append(self.stream.charsUntil("]"))
+            data.append(self.stream.charsUntil(">"))
+            char = self.stream.char()
+            if char == EOF:
+                break
+            else:
+                assert char == ">"
+                if data[-1][-2:] == "]]":
+                    data[-1] = data[-1][:-2]
+                    break
+                else:
+                    data.append(char)
+
+        data = "".join(data)  # pylint:disable=redefined-variable-type
+        # Deal with null here rather than in the parser
+        nullCount = data.count("\u0000")
+        if nullCount > 0:
+            for _ in range(nullCount):
+                self.tokenQueue.append({"type": tokenTypes["ParseError"],
+                                        "data": "invalid-codepoint"})
+            data = data.replace("\u0000", "\uFFFD")
+        if data:
+            self.tokenQueue.append({"type": tokenTypes["Characters"],
+                                    "data": data})
+        self.state = self.dataState
+        return True
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/__init__.py
new file mode 100644
index 0000000..07bad5d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/__init__.py
@@ -0,0 +1,5 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from .py import Trie
+
+__all__ = ["Trie"]
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..21bce17
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/__pycache__/_base.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/__pycache__/_base.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/__pycache__/py.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/__pycache__/py.cpython-38.pyc
new file mode 100644
index 0000000..852f130
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/__pycache__/py.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/_base.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/_base.py
new file mode 100644
index 0000000..6b71975
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/_base.py
@@ -0,0 +1,40 @@
+from __future__ import absolute_import, division, unicode_literals
+
+try:
+    from collections.abc import Mapping
+except ImportError:  # Python 2.7
+    from collections import Mapping
+
+
+class Trie(Mapping):
+    """Abstract base class for tries"""
+
+    def keys(self, prefix=None):
+        # pylint:disable=arguments-differ
+        keys = super(Trie, self).keys()
+
+        if prefix is None:
+            return set(keys)
+
+        return {x for x in keys if x.startswith(prefix)}
+
+    def has_keys_with_prefix(self, prefix):
+        for key in self.keys():
+            if key.startswith(prefix):
+                return True
+
+        return False
+
+    def longest_prefix(self, prefix):
+        if prefix in self:
+            return prefix
+
+        for i in range(1, len(prefix) + 1):
+            if prefix[:-i] in self:
+                return prefix[:-i]
+
+        raise KeyError(prefix)
+
+    def longest_prefix_item(self, prefix):
+        lprefix = self.longest_prefix(prefix)
+        return (lprefix, self[lprefix])
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/py.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/py.py
new file mode 100644
index 0000000..c178b21
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_trie/py.py
@@ -0,0 +1,67 @@
+from __future__ import absolute_import, division, unicode_literals
+from pip._vendor.six import text_type
+
+from bisect import bisect_left
+
+from ._base import Trie as ABCTrie
+
+
+class Trie(ABCTrie):
+    def __init__(self, data):
+        if not all(isinstance(x, text_type) for x in data.keys()):
+            raise TypeError("All keys must be strings")
+
+        self._data = data
+        self._keys = sorted(data.keys())
+        self._cachestr = ""
+        self._cachepoints = (0, len(data))
+
+    def __contains__(self, key):
+        return key in self._data
+
+    def __len__(self):
+        return len(self._data)
+
+    def __iter__(self):
+        return iter(self._data)
+
+    def __getitem__(self, key):
+        return self._data[key]
+
+    def keys(self, prefix=None):
+        if prefix is None or prefix == "" or not self._keys:
+            return set(self._keys)
+
+        if prefix.startswith(self._cachestr):
+            lo, hi = self._cachepoints
+            start = i = bisect_left(self._keys, prefix, lo, hi)
+        else:
+            start = i = bisect_left(self._keys, prefix)
+
+        keys = set()
+        if start == len(self._keys):
+            return keys
+
+        while self._keys[i].startswith(prefix):
+            keys.add(self._keys[i])
+            i += 1
+
+        self._cachestr = prefix
+        self._cachepoints = (start, i)
+
+        return keys
+
+    def has_keys_with_prefix(self, prefix):
+        if prefix in self._data:
+            return True
+
+        if prefix.startswith(self._cachestr):
+            lo, hi = self._cachepoints
+            i = bisect_left(self._keys, prefix, lo, hi)
+        else:
+            i = bisect_left(self._keys, prefix)
+
+        if i == len(self._keys):
+            return False
+
+        return self._keys[i].startswith(prefix)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_utils.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_utils.py
new file mode 100644
index 0000000..d7c4926
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/_utils.py
@@ -0,0 +1,159 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from types import ModuleType
+
+try:
+    from collections.abc import Mapping
+except ImportError:
+    from collections import Mapping
+
+from pip._vendor.six import text_type, PY3
+
+if PY3:
+    import xml.etree.ElementTree as default_etree
+else:
+    try:
+        import xml.etree.cElementTree as default_etree
+    except ImportError:
+        import xml.etree.ElementTree as default_etree
+
+
+__all__ = ["default_etree", "MethodDispatcher", "isSurrogatePair",
+           "surrogatePairToCodepoint", "moduleFactoryFactory",
+           "supports_lone_surrogates"]
+
+
+# Platforms not supporting lone surrogates (\uD800-\uDFFF) should be
+# caught by the below test. In general this would be any platform
+# using UTF-16 as its encoding of unicode strings, such as
+# Jython. This is because UTF-16 itself is based on the use of such
+# surrogates, and there is no mechanism to further escape such
+# escapes.
+try:
+    _x = eval('"\\uD800"')  # pylint:disable=eval-used
+    if not isinstance(_x, text_type):
+        # We need this with u"" because of http://bugs.jython.org/issue2039
+        _x = eval('u"\\uD800"')  # pylint:disable=eval-used
+        assert isinstance(_x, text_type)
+except Exception:
+    supports_lone_surrogates = False
+else:
+    supports_lone_surrogates = True
+
+
+class MethodDispatcher(dict):
+    """Dict with 2 special properties:
+
+    On initiation, keys that are lists, sets or tuples are converted to
+    multiple keys so accessing any one of the items in the original
+    list-like object returns the matching value
+
+    md = MethodDispatcher({("foo", "bar"):"baz"})
+    md["foo"] == "baz"
+
+    A default value which can be set through the default attribute.
+    """
+
+    def __init__(self, items=()):
+        _dictEntries = []
+        for name, value in items:
+            if isinstance(name, (list, tuple, frozenset, set)):
+                for item in name:
+                    _dictEntries.append((item, value))
+            else:
+                _dictEntries.append((name, value))
+        dict.__init__(self, _dictEntries)
+        assert len(self) == len(_dictEntries)
+        self.default = None
+
+    def __getitem__(self, key):
+        return dict.get(self, key, self.default)
+
+    def __get__(self, instance, owner=None):
+        return BoundMethodDispatcher(instance, self)
+
+
+class BoundMethodDispatcher(Mapping):
+    """Wraps a MethodDispatcher, binding its return values to `instance`"""
+    def __init__(self, instance, dispatcher):
+        self.instance = instance
+        self.dispatcher = dispatcher
+
+    def __getitem__(self, key):
+        # see https://docs.python.org/3/reference/datamodel.html#object.__get__
+        # on a function, __get__ is used to bind a function to an instance as a bound method
+        return self.dispatcher[key].__get__(self.instance)
+
+    def get(self, key, default):
+        if key in self.dispatcher:
+            return self[key]
+        else:
+            return default
+
+    def __iter__(self):
+        return iter(self.dispatcher)
+
+    def __len__(self):
+        return len(self.dispatcher)
+
+    def __contains__(self, key):
+        return key in self.dispatcher
+
+
+# Some utility functions to deal with weirdness around UCS2 vs UCS4
+# python builds
+
+def isSurrogatePair(data):
+    return (len(data) == 2 and
+            ord(data[0]) >= 0xD800 and ord(data[0]) <= 0xDBFF and
+            ord(data[1]) >= 0xDC00 and ord(data[1]) <= 0xDFFF)
+
+
+def surrogatePairToCodepoint(data):
+    char_val = (0x10000 + (ord(data[0]) - 0xD800) * 0x400 +
+                (ord(data[1]) - 0xDC00))
+    return char_val
+
+# Module Factory Factory (no, this isn't Java, I know)
+# Here to stop this being duplicated all over the place.
+
+
+def moduleFactoryFactory(factory):
+    moduleCache = {}
+
+    def moduleFactory(baseModule, *args, **kwargs):
+        if isinstance(ModuleType.__name__, type("")):
+            name = "_%s_factory" % baseModule.__name__
+        else:
+            name = b"_%s_factory" % baseModule.__name__
+
+        kwargs_tuple = tuple(kwargs.items())
+
+        try:
+            return moduleCache[name][args][kwargs_tuple]
+        except KeyError:
+            mod = ModuleType(name)
+            objs = factory(baseModule, *args, **kwargs)
+            mod.__dict__.update(objs)
+            if "name" not in moduleCache:
+                moduleCache[name] = {}
+            if "args" not in moduleCache[name]:
+                moduleCache[name][args] = {}
+            if "kwargs" not in moduleCache[name][args]:
+                moduleCache[name][args][kwargs_tuple] = {}
+            moduleCache[name][args][kwargs_tuple] = mod
+            return mod
+
+    return moduleFactory
+
+
+def memoize(func):
+    cache = {}
+
+    def wrapped(*args, **kwargs):
+        key = (tuple(args), tuple(kwargs.items()))
+        if key not in cache:
+            cache[key] = func(*args, **kwargs)
+        return cache[key]
+
+    return wrapped
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/constants.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/constants.py
new file mode 100644
index 0000000..fe3e237
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/constants.py
@@ -0,0 +1,2946 @@
+from __future__ import absolute_import, division, unicode_literals
+
+import string
+
+EOF = None
+
+E = {
+    "null-character":
+        "Null character in input stream, replaced with U+FFFD.",
+    "invalid-codepoint":
+        "Invalid codepoint in stream.",
+    "incorrectly-placed-solidus":
+        "Solidus (/) incorrectly placed in tag.",
+    "incorrect-cr-newline-entity":
+        "Incorrect CR newline entity, replaced with LF.",
+    "illegal-windows-1252-entity":
+        "Entity used with illegal number (windows-1252 reference).",
+    "cant-convert-numeric-entity":
+        "Numeric entity couldn't be converted to character "
+        "(codepoint U+%(charAsInt)08x).",
+    "illegal-codepoint-for-numeric-entity":
+        "Numeric entity represents an illegal codepoint: "
+        "U+%(charAsInt)08x.",
+    "numeric-entity-without-semicolon":
+        "Numeric entity didn't end with ';'.",
+    "expected-numeric-entity-but-got-eof":
+        "Numeric entity expected. Got end of file instead.",
+    "expected-numeric-entity":
+        "Numeric entity expected but none found.",
+    "named-entity-without-semicolon":
+        "Named entity didn't end with ';'.",
+    "expected-named-entity":
+        "Named entity expected. Got none.",
+    "attributes-in-end-tag":
+        "End tag contains unexpected attributes.",
+    'self-closing-flag-on-end-tag':
+        "End tag contains unexpected self-closing flag.",
+    "expected-tag-name-but-got-right-bracket":
+        "Expected tag name. Got '>' instead.",
+    "expected-tag-name-but-got-question-mark":
+        "Expected tag name. Got '?' instead. (HTML doesn't "
+        "support processing instructions.)",
+    "expected-tag-name":
+        "Expected tag name. Got something else instead",
+    "expected-closing-tag-but-got-right-bracket":
+        "Expected closing tag. Got '>' instead. Ignoring '</>'.",
+    "expected-closing-tag-but-got-eof":
+        "Expected closing tag. Unexpected end of file.",
+    "expected-closing-tag-but-got-char":
+        "Expected closing tag. Unexpected character '%(data)s' found.",
+    "eof-in-tag-name":
+        "Unexpected end of file in the tag name.",
+    "expected-attribute-name-but-got-eof":
+        "Unexpected end of file. Expected attribute name instead.",
+    "eof-in-attribute-name":
+        "Unexpected end of file in attribute name.",
+    "invalid-character-in-attribute-name":
+        "Invalid character in attribute name",
+    "duplicate-attribute":
+        "Dropped duplicate attribute on tag.",
+    "expected-end-of-tag-name-but-got-eof":
+        "Unexpected end of file. Expected = or end of tag.",
+    "expected-attribute-value-but-got-eof":
+        "Unexpected end of file. Expected attribute value.",
+    "expected-attribute-value-but-got-right-bracket":
+        "Expected attribute value. Got '>' instead.",
+    'equals-in-unquoted-attribute-value':
+        "Unexpected = in unquoted attribute",
+    'unexpected-character-in-unquoted-attribute-value':
+        "Unexpected character in unquoted attribute",
+    "invalid-character-after-attribute-name":
+        "Unexpected character after attribute name.",
+    "unexpected-character-after-attribute-value":
+        "Unexpected character after attribute value.",
+    "eof-in-attribute-value-double-quote":
+        "Unexpected end of file in attribute value (\").",
+    "eof-in-attribute-value-single-quote":
+        "Unexpected end of file in attribute value (').",
+    "eof-in-attribute-value-no-quotes":
+        "Unexpected end of file in attribute value.",
+    "unexpected-EOF-after-solidus-in-tag":
+        "Unexpected end of file in tag. Expected >",
+    "unexpected-character-after-solidus-in-tag":
+        "Unexpected character after / in tag. Expected >",
+    "expected-dashes-or-doctype":
+        "Expected '--' or 'DOCTYPE'. Not found.",
+    "unexpected-bang-after-double-dash-in-comment":
+        "Unexpected ! after -- in comment",
+    "unexpected-space-after-double-dash-in-comment":
+        "Unexpected space after -- in comment",
+    "incorrect-comment":
+        "Incorrect comment.",
+    "eof-in-comment":
+        "Unexpected end of file in comment.",
+    "eof-in-comment-end-dash":
+        "Unexpected end of file in comment (-)",
+    "unexpected-dash-after-double-dash-in-comment":
+        "Unexpected '-' after '--' found in comment.",
+    "eof-in-comment-double-dash":
+        "Unexpected end of file in comment (--).",
+    "eof-in-comment-end-space-state":
+        "Unexpected end of file in comment.",
+    "eof-in-comment-end-bang-state":
+        "Unexpected end of file in comment.",
+    "unexpected-char-in-comment":
+        "Unexpected character in comment found.",
+    "need-space-after-doctype":
+        "No space after literal string 'DOCTYPE'.",
+    "expected-doctype-name-but-got-right-bracket":
+        "Unexpected > character. Expected DOCTYPE name.",
+    "expected-doctype-name-but-got-eof":
+        "Unexpected end of file. Expected DOCTYPE name.",
+    "eof-in-doctype-name":
+        "Unexpected end of file in DOCTYPE name.",
+    "eof-in-doctype":
+        "Unexpected end of file in DOCTYPE.",
+    "expected-space-or-right-bracket-in-doctype":
+        "Expected space or '>'. Got '%(data)s'",
+    "unexpected-end-of-doctype":
+        "Unexpected end of DOCTYPE.",
+    "unexpected-char-in-doctype":
+        "Unexpected character in DOCTYPE.",
+    "eof-in-innerhtml":
+        "XXX innerHTML EOF",
+    "unexpected-doctype":
+        "Unexpected DOCTYPE. Ignored.",
+    "non-html-root":
+        "html needs to be the first start tag.",
+    "expected-doctype-but-got-eof":
+        "Unexpected End of file. Expected DOCTYPE.",
+    "unknown-doctype":
+        "Erroneous DOCTYPE.",
+    "expected-doctype-but-got-chars":
+        "Unexpected non-space characters. Expected DOCTYPE.",
+    "expected-doctype-but-got-start-tag":
+        "Unexpected start tag (%(name)s). Expected DOCTYPE.",
+    "expected-doctype-but-got-end-tag":
+        "Unexpected end tag (%(name)s). Expected DOCTYPE.",
+    "end-tag-after-implied-root":
+        "Unexpected end tag (%(name)s) after the (implied) root element.",
+    "expected-named-closing-tag-but-got-eof":
+        "Unexpected end of file. Expected end tag (%(name)s).",
+    "two-heads-are-not-better-than-one":
+        "Unexpected start tag head in existing head. Ignored.",
+    "unexpected-end-tag":
+        "Unexpected end tag (%(name)s). Ignored.",
+    "unexpected-start-tag-out-of-my-head":
+        "Unexpected start tag (%(name)s) that can be in head. Moved.",
+    "unexpected-start-tag":
+        "Unexpected start tag (%(name)s).",
+    "missing-end-tag":
+        "Missing end tag (%(name)s).",
+    "missing-end-tags":
+        "Missing end tags (%(name)s).",
+    "unexpected-start-tag-implies-end-tag":
+        "Unexpected start tag (%(startName)s) "
+        "implies end tag (%(endName)s).",
+    "unexpected-start-tag-treated-as":
+        "Unexpected start tag (%(originalName)s). Treated as %(newName)s.",
+    "deprecated-tag":
+        "Unexpected start tag %(name)s. Don't use it!",
+    "unexpected-start-tag-ignored":
+        "Unexpected start tag %(name)s. Ignored.",
+    "expected-one-end-tag-but-got-another":
+        "Unexpected end tag (%(gotName)s). "
+        "Missing end tag (%(expectedName)s).",
+    "end-tag-too-early":
+        "End tag (%(name)s) seen too early. Expected other end tag.",
+    "end-tag-too-early-named":
+        "Unexpected end tag (%(gotName)s). Expected end tag (%(expectedName)s).",
+    "end-tag-too-early-ignored":
+        "End tag (%(name)s) seen too early. Ignored.",
+    "adoption-agency-1.1":
+        "End tag (%(name)s) violates step 1, "
+        "paragraph 1 of the adoption agency algorithm.",
+    "adoption-agency-1.2":
+        "End tag (%(name)s) violates step 1, "
+        "paragraph 2 of the adoption agency algorithm.",
+    "adoption-agency-1.3":
+        "End tag (%(name)s) violates step 1, "
+        "paragraph 3 of the adoption agency algorithm.",
+    "adoption-agency-4.4":
+        "End tag (%(name)s) violates step 4, "
+        "paragraph 4 of the adoption agency algorithm.",
+    "unexpected-end-tag-treated-as":
+        "Unexpected end tag (%(originalName)s). Treated as %(newName)s.",
+    "no-end-tag":
+        "This element (%(name)s) has no end tag.",
+    "unexpected-implied-end-tag-in-table":
+        "Unexpected implied end tag (%(name)s) in the table phase.",
+    "unexpected-implied-end-tag-in-table-body":
+        "Unexpected implied end tag (%(name)s) in the table body phase.",
+    "unexpected-char-implies-table-voodoo":
+        "Unexpected non-space characters in "
+        "table context caused voodoo mode.",
+    "unexpected-hidden-input-in-table":
+        "Unexpected input with type hidden in table context.",
+    "unexpected-form-in-table":
+        "Unexpected form in table context.",
+    "unexpected-start-tag-implies-table-voodoo":
+        "Unexpected start tag (%(name)s) in "
+        "table context caused voodoo mode.",
+    "unexpected-end-tag-implies-table-voodoo":
+        "Unexpected end tag (%(name)s) in "
+        "table context caused voodoo mode.",
+    "unexpected-cell-in-table-body":
+        "Unexpected table cell start tag (%(name)s) "
+        "in the table body phase.",
+    "unexpected-cell-end-tag":
+        "Got table cell end tag (%(name)s) "
+        "while required end tags are missing.",
+    "unexpected-end-tag-in-table-body":
+        "Unexpected end tag (%(name)s) in the table body phase. Ignored.",
+    "unexpected-implied-end-tag-in-table-row":
+        "Unexpected implied end tag (%(name)s) in the table row phase.",
+    "unexpected-end-tag-in-table-row":
+        "Unexpected end tag (%(name)s) in the table row phase. Ignored.",
+    "unexpected-select-in-select":
+        "Unexpected select start tag in the select phase "
+        "treated as select end tag.",
+    "unexpected-input-in-select":
+        "Unexpected input start tag in the select phase.",
+    "unexpected-start-tag-in-select":
+        "Unexpected start tag token (%(name)s in the select phase. "
+        "Ignored.",
+    "unexpected-end-tag-in-select":
+        "Unexpected end tag (%(name)s) in the select phase. Ignored.",
+    "unexpected-table-element-start-tag-in-select-in-table":
+        "Unexpected table element start tag (%(name)s) in the select in table phase.",
+    "unexpected-table-element-end-tag-in-select-in-table":
+        "Unexpected table element end tag (%(name)s) in the select in table phase.",
+    "unexpected-char-after-body":
+        "Unexpected non-space characters in the after body phase.",
+    "unexpected-start-tag-after-body":
+        "Unexpected start tag token (%(name)s)"
+        " in the after body phase.",
+    "unexpected-end-tag-after-body":
+        "Unexpected end tag token (%(name)s)"
+        " in the after body phase.",
+    "unexpected-char-in-frameset":
+        "Unexpected characters in the frameset phase. Characters ignored.",
+    "unexpected-start-tag-in-frameset":
+        "Unexpected start tag token (%(name)s)"
+        " in the frameset phase. Ignored.",
+    "unexpected-frameset-in-frameset-innerhtml":
+        "Unexpected end tag token (frameset) "
+        "in the frameset phase (innerHTML).",
+    "unexpected-end-tag-in-frameset":
+        "Unexpected end tag token (%(name)s)"
+        " in the frameset phase. Ignored.",
+    "unexpected-char-after-frameset":
+        "Unexpected non-space characters in the "
+        "after frameset phase. Ignored.",
+    "unexpected-start-tag-after-frameset":
+        "Unexpected start tag (%(name)s)"
+        " in the after frameset phase. Ignored.",
+    "unexpected-end-tag-after-frameset":
+        "Unexpected end tag (%(name)s)"
+        " in the after frameset phase. Ignored.",
+    "unexpected-end-tag-after-body-innerhtml":
+        "Unexpected end tag after body(innerHtml)",
+    "expected-eof-but-got-char":
+        "Unexpected non-space characters. Expected end of file.",
+    "expected-eof-but-got-start-tag":
+        "Unexpected start tag (%(name)s)"
+        ". Expected end of file.",
+    "expected-eof-but-got-end-tag":
+        "Unexpected end tag (%(name)s)"
+        ". Expected end of file.",
+    "eof-in-table":
+        "Unexpected end of file. Expected table content.",
+    "eof-in-select":
+        "Unexpected end of file. Expected select content.",
+    "eof-in-frameset":
+        "Unexpected end of file. Expected frameset content.",
+    "eof-in-script-in-script":
+        "Unexpected end of file. Expected script content.",
+    "eof-in-foreign-lands":
+        "Unexpected end of file. Expected foreign content",
+    "non-void-element-with-trailing-solidus":
+        "Trailing solidus not allowed on element %(name)s",
+    "unexpected-html-element-in-foreign-content":
+        "Element %(name)s not allowed in a non-html context",
+    "unexpected-end-tag-before-html":
+        "Unexpected end tag (%(name)s) before html.",
+    "unexpected-inhead-noscript-tag":
+        "Element %(name)s not allowed in a inhead-noscript context",
+    "eof-in-head-noscript":
+        "Unexpected end of file. Expected inhead-noscript content",
+    "char-in-head-noscript":
+        "Unexpected non-space character. Expected inhead-noscript content",
+    "XXX-undefined-error":
+        "Undefined error (this sucks and should be fixed)",
+}
+
+namespaces = {
+    "html": "http://www.w3.org/1999/xhtml",
+    "mathml": "http://www.w3.org/1998/Math/MathML",
+    "svg": "http://www.w3.org/2000/svg",
+    "xlink": "http://www.w3.org/1999/xlink",
+    "xml": "http://www.w3.org/XML/1998/namespace",
+    "xmlns": "http://www.w3.org/2000/xmlns/"
+}
+
+scopingElements = frozenset([
+    (namespaces["html"], "applet"),
+    (namespaces["html"], "caption"),
+    (namespaces["html"], "html"),
+    (namespaces["html"], "marquee"),
+    (namespaces["html"], "object"),
+    (namespaces["html"], "table"),
+    (namespaces["html"], "td"),
+    (namespaces["html"], "th"),
+    (namespaces["mathml"], "mi"),
+    (namespaces["mathml"], "mo"),
+    (namespaces["mathml"], "mn"),
+    (namespaces["mathml"], "ms"),
+    (namespaces["mathml"], "mtext"),
+    (namespaces["mathml"], "annotation-xml"),
+    (namespaces["svg"], "foreignObject"),
+    (namespaces["svg"], "desc"),
+    (namespaces["svg"], "title"),
+])
+
+formattingElements = frozenset([
+    (namespaces["html"], "a"),
+    (namespaces["html"], "b"),
+    (namespaces["html"], "big"),
+    (namespaces["html"], "code"),
+    (namespaces["html"], "em"),
+    (namespaces["html"], "font"),
+    (namespaces["html"], "i"),
+    (namespaces["html"], "nobr"),
+    (namespaces["html"], "s"),
+    (namespaces["html"], "small"),
+    (namespaces["html"], "strike"),
+    (namespaces["html"], "strong"),
+    (namespaces["html"], "tt"),
+    (namespaces["html"], "u")
+])
+
+specialElements = frozenset([
+    (namespaces["html"], "address"),
+    (namespaces["html"], "applet"),
+    (namespaces["html"], "area"),
+    (namespaces["html"], "article"),
+    (namespaces["html"], "aside"),
+    (namespaces["html"], "base"),
+    (namespaces["html"], "basefont"),
+    (namespaces["html"], "bgsound"),
+    (namespaces["html"], "blockquote"),
+    (namespaces["html"], "body"),
+    (namespaces["html"], "br"),
+    (namespaces["html"], "button"),
+    (namespaces["html"], "caption"),
+    (namespaces["html"], "center"),
+    (namespaces["html"], "col"),
+    (namespaces["html"], "colgroup"),
+    (namespaces["html"], "command"),
+    (namespaces["html"], "dd"),
+    (namespaces["html"], "details"),
+    (namespaces["html"], "dir"),
+    (namespaces["html"], "div"),
+    (namespaces["html"], "dl"),
+    (namespaces["html"], "dt"),
+    (namespaces["html"], "embed"),
+    (namespaces["html"], "fieldset"),
+    (namespaces["html"], "figure"),
+    (namespaces["html"], "footer"),
+    (namespaces["html"], "form"),
+    (namespaces["html"], "frame"),
+    (namespaces["html"], "frameset"),
+    (namespaces["html"], "h1"),
+    (namespaces["html"], "h2"),
+    (namespaces["html"], "h3"),
+    (namespaces["html"], "h4"),
+    (namespaces["html"], "h5"),
+    (namespaces["html"], "h6"),
+    (namespaces["html"], "head"),
+    (namespaces["html"], "header"),
+    (namespaces["html"], "hr"),
+    (namespaces["html"], "html"),
+    (namespaces["html"], "iframe"),
+    # Note that image is commented out in the spec as "this isn't an
+    # element that can end up on the stack, so it doesn't matter,"
+    (namespaces["html"], "image"),
+    (namespaces["html"], "img"),
+    (namespaces["html"], "input"),
+    (namespaces["html"], "isindex"),
+    (namespaces["html"], "li"),
+    (namespaces["html"], "link"),
+    (namespaces["html"], "listing"),
+    (namespaces["html"], "marquee"),
+    (namespaces["html"], "menu"),
+    (namespaces["html"], "meta"),
+    (namespaces["html"], "nav"),
+    (namespaces["html"], "noembed"),
+    (namespaces["html"], "noframes"),
+    (namespaces["html"], "noscript"),
+    (namespaces["html"], "object"),
+    (namespaces["html"], "ol"),
+    (namespaces["html"], "p"),
+    (namespaces["html"], "param"),
+    (namespaces["html"], "plaintext"),
+    (namespaces["html"], "pre"),
+    (namespaces["html"], "script"),
+    (namespaces["html"], "section"),
+    (namespaces["html"], "select"),
+    (namespaces["html"], "style"),
+    (namespaces["html"], "table"),
+    (namespaces["html"], "tbody"),
+    (namespaces["html"], "td"),
+    (namespaces["html"], "textarea"),
+    (namespaces["html"], "tfoot"),
+    (namespaces["html"], "th"),
+    (namespaces["html"], "thead"),
+    (namespaces["html"], "title"),
+    (namespaces["html"], "tr"),
+    (namespaces["html"], "ul"),
+    (namespaces["html"], "wbr"),
+    (namespaces["html"], "xmp"),
+    (namespaces["svg"], "foreignObject")
+])
+
+htmlIntegrationPointElements = frozenset([
+    (namespaces["mathml"], "annotation-xml"),
+    (namespaces["svg"], "foreignObject"),
+    (namespaces["svg"], "desc"),
+    (namespaces["svg"], "title")
+])
+
+mathmlTextIntegrationPointElements = frozenset([
+    (namespaces["mathml"], "mi"),
+    (namespaces["mathml"], "mo"),
+    (namespaces["mathml"], "mn"),
+    (namespaces["mathml"], "ms"),
+    (namespaces["mathml"], "mtext")
+])
+
+adjustSVGAttributes = {
+    "attributename": "attributeName",
+    "attributetype": "attributeType",
+    "basefrequency": "baseFrequency",
+    "baseprofile": "baseProfile",
+    "calcmode": "calcMode",
+    "clippathunits": "clipPathUnits",
+    "contentscripttype": "contentScriptType",
+    "contentstyletype": "contentStyleType",
+    "diffuseconstant": "diffuseConstant",
+    "edgemode": "edgeMode",
+    "externalresourcesrequired": "externalResourcesRequired",
+    "filterres": "filterRes",
+    "filterunits": "filterUnits",
+    "glyphref": "glyphRef",
+    "gradienttransform": "gradientTransform",
+    "gradientunits": "gradientUnits",
+    "kernelmatrix": "kernelMatrix",
+    "kernelunitlength": "kernelUnitLength",
+    "keypoints": "keyPoints",
+    "keysplines": "keySplines",
+    "keytimes": "keyTimes",
+    "lengthadjust": "lengthAdjust",
+    "limitingconeangle": "limitingConeAngle",
+    "markerheight": "markerHeight",
+    "markerunits": "markerUnits",
+    "markerwidth": "markerWidth",
+    "maskcontentunits": "maskContentUnits",
+    "maskunits": "maskUnits",
+    "numoctaves": "numOctaves",
+    "pathlength": "pathLength",
+    "patterncontentunits": "patternContentUnits",
+    "patterntransform": "patternTransform",
+    "patternunits": "patternUnits",
+    "pointsatx": "pointsAtX",
+    "pointsaty": "pointsAtY",
+    "pointsatz": "pointsAtZ",
+    "preservealpha": "preserveAlpha",
+    "preserveaspectratio": "preserveAspectRatio",
+    "primitiveunits": "primitiveUnits",
+    "refx": "refX",
+    "refy": "refY",
+    "repeatcount": "repeatCount",
+    "repeatdur": "repeatDur",
+    "requiredextensions": "requiredExtensions",
+    "requiredfeatures": "requiredFeatures",
+    "specularconstant": "specularConstant",
+    "specularexponent": "specularExponent",
+    "spreadmethod": "spreadMethod",
+    "startoffset": "startOffset",
+    "stddeviation": "stdDeviation",
+    "stitchtiles": "stitchTiles",
+    "surfacescale": "surfaceScale",
+    "systemlanguage": "systemLanguage",
+    "tablevalues": "tableValues",
+    "targetx": "targetX",
+    "targety": "targetY",
+    "textlength": "textLength",
+    "viewbox": "viewBox",
+    "viewtarget": "viewTarget",
+    "xchannelselector": "xChannelSelector",
+    "ychannelselector": "yChannelSelector",
+    "zoomandpan": "zoomAndPan"
+}
+
+adjustMathMLAttributes = {"definitionurl": "definitionURL"}
+
+adjustForeignAttributes = {
+    "xlink:actuate": ("xlink", "actuate", namespaces["xlink"]),
+    "xlink:arcrole": ("xlink", "arcrole", namespaces["xlink"]),
+    "xlink:href": ("xlink", "href", namespaces["xlink"]),
+    "xlink:role": ("xlink", "role", namespaces["xlink"]),
+    "xlink:show": ("xlink", "show", namespaces["xlink"]),
+    "xlink:title": ("xlink", "title", namespaces["xlink"]),
+    "xlink:type": ("xlink", "type", namespaces["xlink"]),
+    "xml:base": ("xml", "base", namespaces["xml"]),
+    "xml:lang": ("xml", "lang", namespaces["xml"]),
+    "xml:space": ("xml", "space", namespaces["xml"]),
+    "xmlns": (None, "xmlns", namespaces["xmlns"]),
+    "xmlns:xlink": ("xmlns", "xlink", namespaces["xmlns"])
+}
+
+unadjustForeignAttributes = {(ns, local): qname for qname, (prefix, local, ns) in
+                             adjustForeignAttributes.items()}
+
+spaceCharacters = frozenset([
+    "\t",
+    "\n",
+    "\u000C",
+    " ",
+    "\r"
+])
+
+tableInsertModeElements = frozenset([
+    "table",
+    "tbody",
+    "tfoot",
+    "thead",
+    "tr"
+])
+
+asciiLowercase = frozenset(string.ascii_lowercase)
+asciiUppercase = frozenset(string.ascii_uppercase)
+asciiLetters = frozenset(string.ascii_letters)
+digits = frozenset(string.digits)
+hexDigits = frozenset(string.hexdigits)
+
+asciiUpper2Lower = {ord(c): ord(c.lower()) for c in string.ascii_uppercase}
+
+# Heading elements need to be ordered
+headingElements = (
+    "h1",
+    "h2",
+    "h3",
+    "h4",
+    "h5",
+    "h6"
+)
+
+voidElements = frozenset([
+    "base",
+    "command",
+    "event-source",
+    "link",
+    "meta",
+    "hr",
+    "br",
+    "img",
+    "embed",
+    "param",
+    "area",
+    "col",
+    "input",
+    "source",
+    "track"
+])
+
+cdataElements = frozenset(['title', 'textarea'])
+
+rcdataElements = frozenset([
+    'style',
+    'script',
+    'xmp',
+    'iframe',
+    'noembed',
+    'noframes',
+    'noscript'
+])
+
+booleanAttributes = {
+    "": frozenset(["irrelevant", "itemscope"]),
+    "style": frozenset(["scoped"]),
+    "img": frozenset(["ismap"]),
+    "audio": frozenset(["autoplay", "controls"]),
+    "video": frozenset(["autoplay", "controls"]),
+    "script": frozenset(["defer", "async"]),
+    "details": frozenset(["open"]),
+    "datagrid": frozenset(["multiple", "disabled"]),
+    "command": frozenset(["hidden", "disabled", "checked", "default"]),
+    "hr": frozenset(["noshade"]),
+    "menu": frozenset(["autosubmit"]),
+    "fieldset": frozenset(["disabled", "readonly"]),
+    "option": frozenset(["disabled", "readonly", "selected"]),
+    "optgroup": frozenset(["disabled", "readonly"]),
+    "button": frozenset(["disabled", "autofocus"]),
+    "input": frozenset(["disabled", "readonly", "required", "autofocus", "checked", "ismap"]),
+    "select": frozenset(["disabled", "readonly", "autofocus", "multiple"]),
+    "output": frozenset(["disabled", "readonly"]),
+    "iframe": frozenset(["seamless"]),
+}
+
+# entitiesWindows1252 has to be _ordered_ and needs to have an index. It
+# therefore can't be a frozenset.
+entitiesWindows1252 = (
+    8364,   # 0x80  0x20AC  EURO SIGN
+    65533,  # 0x81          UNDEFINED
+    8218,   # 0x82  0x201A  SINGLE LOW-9 QUOTATION MARK
+    402,    # 0x83  0x0192  LATIN SMALL LETTER F WITH HOOK
+    8222,   # 0x84  0x201E  DOUBLE LOW-9 QUOTATION MARK
+    8230,   # 0x85  0x2026  HORIZONTAL ELLIPSIS
+    8224,   # 0x86  0x2020  DAGGER
+    8225,   # 0x87  0x2021  DOUBLE DAGGER
+    710,    # 0x88  0x02C6  MODIFIER LETTER CIRCUMFLEX ACCENT
+    8240,   # 0x89  0x2030  PER MILLE SIGN
+    352,    # 0x8A  0x0160  LATIN CAPITAL LETTER S WITH CARON
+    8249,   # 0x8B  0x2039  SINGLE LEFT-POINTING ANGLE QUOTATION MARK
+    338,    # 0x8C  0x0152  LATIN CAPITAL LIGATURE OE
+    65533,  # 0x8D          UNDEFINED
+    381,    # 0x8E  0x017D  LATIN CAPITAL LETTER Z WITH CARON
+    65533,  # 0x8F          UNDEFINED
+    65533,  # 0x90          UNDEFINED
+    8216,   # 0x91  0x2018  LEFT SINGLE QUOTATION MARK
+    8217,   # 0x92  0x2019  RIGHT SINGLE QUOTATION MARK
+    8220,   # 0x93  0x201C  LEFT DOUBLE QUOTATION MARK
+    8221,   # 0x94  0x201D  RIGHT DOUBLE QUOTATION MARK
+    8226,   # 0x95  0x2022  BULLET
+    8211,   # 0x96  0x2013  EN DASH
+    8212,   # 0x97  0x2014  EM DASH
+    732,    # 0x98  0x02DC  SMALL TILDE
+    8482,   # 0x99  0x2122  TRADE MARK SIGN
+    353,    # 0x9A  0x0161  LATIN SMALL LETTER S WITH CARON
+    8250,   # 0x9B  0x203A  SINGLE RIGHT-POINTING ANGLE QUOTATION MARK
+    339,    # 0x9C  0x0153  LATIN SMALL LIGATURE OE
+    65533,  # 0x9D          UNDEFINED
+    382,    # 0x9E  0x017E  LATIN SMALL LETTER Z WITH CARON
+    376     # 0x9F  0x0178  LATIN CAPITAL LETTER Y WITH DIAERESIS
+)
+
+xmlEntities = frozenset(['lt;', 'gt;', 'amp;', 'apos;', 'quot;'])
+
+entities = {
+    "AElig": "\xc6",
+    "AElig;": "\xc6",
+    "AMP": "&",
+    "AMP;": "&",
+    "Aacute": "\xc1",
+    "Aacute;": "\xc1",
+    "Abreve;": "\u0102",
+    "Acirc": "\xc2",
+    "Acirc;": "\xc2",
+    "Acy;": "\u0410",
+    "Afr;": "\U0001d504",
+    "Agrave": "\xc0",
+    "Agrave;": "\xc0",
+    "Alpha;": "\u0391",
+    "Amacr;": "\u0100",
+    "And;": "\u2a53",
+    "Aogon;": "\u0104",
+    "Aopf;": "\U0001d538",
+    "ApplyFunction;": "\u2061",
+    "Aring": "\xc5",
+    "Aring;": "\xc5",
+    "Ascr;": "\U0001d49c",
+    "Assign;": "\u2254",
+    "Atilde": "\xc3",
+    "Atilde;": "\xc3",
+    "Auml": "\xc4",
+    "Auml;": "\xc4",
+    "Backslash;": "\u2216",
+    "Barv;": "\u2ae7",
+    "Barwed;": "\u2306",
+    "Bcy;": "\u0411",
+    "Because;": "\u2235",
+    "Bernoullis;": "\u212c",
+    "Beta;": "\u0392",
+    "Bfr;": "\U0001d505",
+    "Bopf;": "\U0001d539",
+    "Breve;": "\u02d8",
+    "Bscr;": "\u212c",
+    "Bumpeq;": "\u224e",
+    "CHcy;": "\u0427",
+    "COPY": "\xa9",
+    "COPY;": "\xa9",
+    "Cacute;": "\u0106",
+    "Cap;": "\u22d2",
+    "CapitalDifferentialD;": "\u2145",
+    "Cayleys;": "\u212d",
+    "Ccaron;": "\u010c",
+    "Ccedil": "\xc7",
+    "Ccedil;": "\xc7",
+    "Ccirc;": "\u0108",
+    "Cconint;": "\u2230",
+    "Cdot;": "\u010a",
+    "Cedilla;": "\xb8",
+    "CenterDot;": "\xb7",
+    "Cfr;": "\u212d",
+    "Chi;": "\u03a7",
+    "CircleDot;": "\u2299",
+    "CircleMinus;": "\u2296",
+    "CirclePlus;": "\u2295",
+    "CircleTimes;": "\u2297",
+    "ClockwiseContourIntegral;": "\u2232",
+    "CloseCurlyDoubleQuote;": "\u201d",
+    "CloseCurlyQuote;": "\u2019",
+    "Colon;": "\u2237",
+    "Colone;": "\u2a74",
+    "Congruent;": "\u2261",
+    "Conint;": "\u222f",
+    "ContourIntegral;": "\u222e",
+    "Copf;": "\u2102",
+    "Coproduct;": "\u2210",
+    "CounterClockwiseContourIntegral;": "\u2233",
+    "Cross;": "\u2a2f",
+    "Cscr;": "\U0001d49e",
+    "Cup;": "\u22d3",
+    "CupCap;": "\u224d",
+    "DD;": "\u2145",
+    "DDotrahd;": "\u2911",
+    "DJcy;": "\u0402",
+    "DScy;": "\u0405",
+    "DZcy;": "\u040f",
+    "Dagger;": "\u2021",
+    "Darr;": "\u21a1",
+    "Dashv;": "\u2ae4",
+    "Dcaron;": "\u010e",
+    "Dcy;": "\u0414",
+    "Del;": "\u2207",
+    "Delta;": "\u0394",
+    "Dfr;": "\U0001d507",
+    "DiacriticalAcute;": "\xb4",
+    "DiacriticalDot;": "\u02d9",
+    "DiacriticalDoubleAcute;": "\u02dd",
+    "DiacriticalGrave;": "`",
+    "DiacriticalTilde;": "\u02dc",
+    "Diamond;": "\u22c4",
+    "DifferentialD;": "\u2146",
+    "Dopf;": "\U0001d53b",
+    "Dot;": "\xa8",
+    "DotDot;": "\u20dc",
+    "DotEqual;": "\u2250",
+    "DoubleContourIntegral;": "\u222f",
+    "DoubleDot;": "\xa8",
+    "DoubleDownArrow;": "\u21d3",
+    "DoubleLeftArrow;": "\u21d0",
+    "DoubleLeftRightArrow;": "\u21d4",
+    "DoubleLeftTee;": "\u2ae4",
+    "DoubleLongLeftArrow;": "\u27f8",
+    "DoubleLongLeftRightArrow;": "\u27fa",
+    "DoubleLongRightArrow;": "\u27f9",
+    "DoubleRightArrow;": "\u21d2",
+    "DoubleRightTee;": "\u22a8",
+    "DoubleUpArrow;": "\u21d1",
+    "DoubleUpDownArrow;": "\u21d5",
+    "DoubleVerticalBar;": "\u2225",
+    "DownArrow;": "\u2193",
+    "DownArrowBar;": "\u2913",
+    "DownArrowUpArrow;": "\u21f5",
+    "DownBreve;": "\u0311",
+    "DownLeftRightVector;": "\u2950",
+    "DownLeftTeeVector;": "\u295e",
+    "DownLeftVector;": "\u21bd",
+    "DownLeftVectorBar;": "\u2956",
+    "DownRightTeeVector;": "\u295f",
+    "DownRightVector;": "\u21c1",
+    "DownRightVectorBar;": "\u2957",
+    "DownTee;": "\u22a4",
+    "DownTeeArrow;": "\u21a7",
+    "Downarrow;": "\u21d3",
+    "Dscr;": "\U0001d49f",
+    "Dstrok;": "\u0110",
+    "ENG;": "\u014a",
+    "ETH": "\xd0",
+    "ETH;": "\xd0",
+    "Eacute": "\xc9",
+    "Eacute;": "\xc9",
+    "Ecaron;": "\u011a",
+    "Ecirc": "\xca",
+    "Ecirc;": "\xca",
+    "Ecy;": "\u042d",
+    "Edot;": "\u0116",
+    "Efr;": "\U0001d508",
+    "Egrave": "\xc8",
+    "Egrave;": "\xc8",
+    "Element;": "\u2208",
+    "Emacr;": "\u0112",
+    "EmptySmallSquare;": "\u25fb",
+    "EmptyVerySmallSquare;": "\u25ab",
+    "Eogon;": "\u0118",
+    "Eopf;": "\U0001d53c",
+    "Epsilon;": "\u0395",
+    "Equal;": "\u2a75",
+    "EqualTilde;": "\u2242",
+    "Equilibrium;": "\u21cc",
+    "Escr;": "\u2130",
+    "Esim;": "\u2a73",
+    "Eta;": "\u0397",
+    "Euml": "\xcb",
+    "Euml;": "\xcb",
+    "Exists;": "\u2203",
+    "ExponentialE;": "\u2147",
+    "Fcy;": "\u0424",
+    "Ffr;": "\U0001d509",
+    "FilledSmallSquare;": "\u25fc",
+    "FilledVerySmallSquare;": "\u25aa",
+    "Fopf;": "\U0001d53d",
+    "ForAll;": "\u2200",
+    "Fouriertrf;": "\u2131",
+    "Fscr;": "\u2131",
+    "GJcy;": "\u0403",
+    "GT": ">",
+    "GT;": ">",
+    "Gamma;": "\u0393",
+    "Gammad;": "\u03dc",
+    "Gbreve;": "\u011e",
+    "Gcedil;": "\u0122",
+    "Gcirc;": "\u011c",
+    "Gcy;": "\u0413",
+    "Gdot;": "\u0120",
+    "Gfr;": "\U0001d50a",
+    "Gg;": "\u22d9",
+    "Gopf;": "\U0001d53e",
+    "GreaterEqual;": "\u2265",
+    "GreaterEqualLess;": "\u22db",
+    "GreaterFullEqual;": "\u2267",
+    "GreaterGreater;": "\u2aa2",
+    "GreaterLess;": "\u2277",
+    "GreaterSlantEqual;": "\u2a7e",
+    "GreaterTilde;": "\u2273",
+    "Gscr;": "\U0001d4a2",
+    "Gt;": "\u226b",
+    "HARDcy;": "\u042a",
+    "Hacek;": "\u02c7",
+    "Hat;": "^",
+    "Hcirc;": "\u0124",
+    "Hfr;": "\u210c",
+    "HilbertSpace;": "\u210b",
+    "Hopf;": "\u210d",
+    "HorizontalLine;": "\u2500",
+    "Hscr;": "\u210b",
+    "Hstrok;": "\u0126",
+    "HumpDownHump;": "\u224e",
+    "HumpEqual;": "\u224f",
+    "IEcy;": "\u0415",
+    "IJlig;": "\u0132",
+    "IOcy;": "\u0401",
+    "Iacute": "\xcd",
+    "Iacute;": "\xcd",
+    "Icirc": "\xce",
+    "Icirc;": "\xce",
+    "Icy;": "\u0418",
+    "Idot;": "\u0130",
+    "Ifr;": "\u2111",
+    "Igrave": "\xcc",
+    "Igrave;": "\xcc",
+    "Im;": "\u2111",
+    "Imacr;": "\u012a",
+    "ImaginaryI;": "\u2148",
+    "Implies;": "\u21d2",
+    "Int;": "\u222c",
+    "Integral;": "\u222b",
+    "Intersection;": "\u22c2",
+    "InvisibleComma;": "\u2063",
+    "InvisibleTimes;": "\u2062",
+    "Iogon;": "\u012e",
+    "Iopf;": "\U0001d540",
+    "Iota;": "\u0399",
+    "Iscr;": "\u2110",
+    "Itilde;": "\u0128",
+    "Iukcy;": "\u0406",
+    "Iuml": "\xcf",
+    "Iuml;": "\xcf",
+    "Jcirc;": "\u0134",
+    "Jcy;": "\u0419",
+    "Jfr;": "\U0001d50d",
+    "Jopf;": "\U0001d541",
+    "Jscr;": "\U0001d4a5",
+    "Jsercy;": "\u0408",
+    "Jukcy;": "\u0404",
+    "KHcy;": "\u0425",
+    "KJcy;": "\u040c",
+    "Kappa;": "\u039a",
+    "Kcedil;": "\u0136",
+    "Kcy;": "\u041a",
+    "Kfr;": "\U0001d50e",
+    "Kopf;": "\U0001d542",
+    "Kscr;": "\U0001d4a6",
+    "LJcy;": "\u0409",
+    "LT": "<",
+    "LT;": "<",
+    "Lacute;": "\u0139",
+    "Lambda;": "\u039b",
+    "Lang;": "\u27ea",
+    "Laplacetrf;": "\u2112",
+    "Larr;": "\u219e",
+    "Lcaron;": "\u013d",
+    "Lcedil;": "\u013b",
+    "Lcy;": "\u041b",
+    "LeftAngleBracket;": "\u27e8",
+    "LeftArrow;": "\u2190",
+    "LeftArrowBar;": "\u21e4",
+    "LeftArrowRightArrow;": "\u21c6",
+    "LeftCeiling;": "\u2308",
+    "LeftDoubleBracket;": "\u27e6",
+    "LeftDownTeeVector;": "\u2961",
+    "LeftDownVector;": "\u21c3",
+    "LeftDownVectorBar;": "\u2959",
+    "LeftFloor;": "\u230a",
+    "LeftRightArrow;": "\u2194",
+    "LeftRightVector;": "\u294e",
+    "LeftTee;": "\u22a3",
+    "LeftTeeArrow;": "\u21a4",
+    "LeftTeeVector;": "\u295a",
+    "LeftTriangle;": "\u22b2",
+    "LeftTriangleBar;": "\u29cf",
+    "LeftTriangleEqual;": "\u22b4",
+    "LeftUpDownVector;": "\u2951",
+    "LeftUpTeeVector;": "\u2960",
+    "LeftUpVector;": "\u21bf",
+    "LeftUpVectorBar;": "\u2958",
+    "LeftVector;": "\u21bc",
+    "LeftVectorBar;": "\u2952",
+    "Leftarrow;": "\u21d0",
+    "Leftrightarrow;": "\u21d4",
+    "LessEqualGreater;": "\u22da",
+    "LessFullEqual;": "\u2266",
+    "LessGreater;": "\u2276",
+    "LessLess;": "\u2aa1",
+    "LessSlantEqual;": "\u2a7d",
+    "LessTilde;": "\u2272",
+    "Lfr;": "\U0001d50f",
+    "Ll;": "\u22d8",
+    "Lleftarrow;": "\u21da",
+    "Lmidot;": "\u013f",
+    "LongLeftArrow;": "\u27f5",
+    "LongLeftRightArrow;": "\u27f7",
+    "LongRightArrow;": "\u27f6",
+    "Longleftarrow;": "\u27f8",
+    "Longleftrightarrow;": "\u27fa",
+    "Longrightarrow;": "\u27f9",
+    "Lopf;": "\U0001d543",
+    "LowerLeftArrow;": "\u2199",
+    "LowerRightArrow;": "\u2198",
+    "Lscr;": "\u2112",
+    "Lsh;": "\u21b0",
+    "Lstrok;": "\u0141",
+    "Lt;": "\u226a",
+    "Map;": "\u2905",
+    "Mcy;": "\u041c",
+    "MediumSpace;": "\u205f",
+    "Mellintrf;": "\u2133",
+    "Mfr;": "\U0001d510",
+    "MinusPlus;": "\u2213",
+    "Mopf;": "\U0001d544",
+    "Mscr;": "\u2133",
+    "Mu;": "\u039c",
+    "NJcy;": "\u040a",
+    "Nacute;": "\u0143",
+    "Ncaron;": "\u0147",
+    "Ncedil;": "\u0145",
+    "Ncy;": "\u041d",
+    "NegativeMediumSpace;": "\u200b",
+    "NegativeThickSpace;": "\u200b",
+    "NegativeThinSpace;": "\u200b",
+    "NegativeVeryThinSpace;": "\u200b",
+    "NestedGreaterGreater;": "\u226b",
+    "NestedLessLess;": "\u226a",
+    "NewLine;": "\n",
+    "Nfr;": "\U0001d511",
+    "NoBreak;": "\u2060",
+    "NonBreakingSpace;": "\xa0",
+    "Nopf;": "\u2115",
+    "Not;": "\u2aec",
+    "NotCongruent;": "\u2262",
+    "NotCupCap;": "\u226d",
+    "NotDoubleVerticalBar;": "\u2226",
+    "NotElement;": "\u2209",
+    "NotEqual;": "\u2260",
+    "NotEqualTilde;": "\u2242\u0338",
+    "NotExists;": "\u2204",
+    "NotGreater;": "\u226f",
+    "NotGreaterEqual;": "\u2271",
+    "NotGreaterFullEqual;": "\u2267\u0338",
+    "NotGreaterGreater;": "\u226b\u0338",
+    "NotGreaterLess;": "\u2279",
+    "NotGreaterSlantEqual;": "\u2a7e\u0338",
+    "NotGreaterTilde;": "\u2275",
+    "NotHumpDownHump;": "\u224e\u0338",
+    "NotHumpEqual;": "\u224f\u0338",
+    "NotLeftTriangle;": "\u22ea",
+    "NotLeftTriangleBar;": "\u29cf\u0338",
+    "NotLeftTriangleEqual;": "\u22ec",
+    "NotLess;": "\u226e",
+    "NotLessEqual;": "\u2270",
+    "NotLessGreater;": "\u2278",
+    "NotLessLess;": "\u226a\u0338",
+    "NotLessSlantEqual;": "\u2a7d\u0338",
+    "NotLessTilde;": "\u2274",
+    "NotNestedGreaterGreater;": "\u2aa2\u0338",
+    "NotNestedLessLess;": "\u2aa1\u0338",
+    "NotPrecedes;": "\u2280",
+    "NotPrecedesEqual;": "\u2aaf\u0338",
+    "NotPrecedesSlantEqual;": "\u22e0",
+    "NotReverseElement;": "\u220c",
+    "NotRightTriangle;": "\u22eb",
+    "NotRightTriangleBar;": "\u29d0\u0338",
+    "NotRightTriangleEqual;": "\u22ed",
+    "NotSquareSubset;": "\u228f\u0338",
+    "NotSquareSubsetEqual;": "\u22e2",
+    "NotSquareSuperset;": "\u2290\u0338",
+    "NotSquareSupersetEqual;": "\u22e3",
+    "NotSubset;": "\u2282\u20d2",
+    "NotSubsetEqual;": "\u2288",
+    "NotSucceeds;": "\u2281",
+    "NotSucceedsEqual;": "\u2ab0\u0338",
+    "NotSucceedsSlantEqual;": "\u22e1",
+    "NotSucceedsTilde;": "\u227f\u0338",
+    "NotSuperset;": "\u2283\u20d2",
+    "NotSupersetEqual;": "\u2289",
+    "NotTilde;": "\u2241",
+    "NotTildeEqual;": "\u2244",
+    "NotTildeFullEqual;": "\u2247",
+    "NotTildeTilde;": "\u2249",
+    "NotVerticalBar;": "\u2224",
+    "Nscr;": "\U0001d4a9",
+    "Ntilde": "\xd1",
+    "Ntilde;": "\xd1",
+    "Nu;": "\u039d",
+    "OElig;": "\u0152",
+    "Oacute": "\xd3",
+    "Oacute;": "\xd3",
+    "Ocirc": "\xd4",
+    "Ocirc;": "\xd4",
+    "Ocy;": "\u041e",
+    "Odblac;": "\u0150",
+    "Ofr;": "\U0001d512",
+    "Ograve": "\xd2",
+    "Ograve;": "\xd2",
+    "Omacr;": "\u014c",
+    "Omega;": "\u03a9",
+    "Omicron;": "\u039f",
+    "Oopf;": "\U0001d546",
+    "OpenCurlyDoubleQuote;": "\u201c",
+    "OpenCurlyQuote;": "\u2018",
+    "Or;": "\u2a54",
+    "Oscr;": "\U0001d4aa",
+    "Oslash": "\xd8",
+    "Oslash;": "\xd8",
+    "Otilde": "\xd5",
+    "Otilde;": "\xd5",
+    "Otimes;": "\u2a37",
+    "Ouml": "\xd6",
+    "Ouml;": "\xd6",
+    "OverBar;": "\u203e",
+    "OverBrace;": "\u23de",
+    "OverBracket;": "\u23b4",
+    "OverParenthesis;": "\u23dc",
+    "PartialD;": "\u2202",
+    "Pcy;": "\u041f",
+    "Pfr;": "\U0001d513",
+    "Phi;": "\u03a6",
+    "Pi;": "\u03a0",
+    "PlusMinus;": "\xb1",
+    "Poincareplane;": "\u210c",
+    "Popf;": "\u2119",
+    "Pr;": "\u2abb",
+    "Precedes;": "\u227a",
+    "PrecedesEqual;": "\u2aaf",
+    "PrecedesSlantEqual;": "\u227c",
+    "PrecedesTilde;": "\u227e",
+    "Prime;": "\u2033",
+    "Product;": "\u220f",
+    "Proportion;": "\u2237",
+    "Proportional;": "\u221d",
+    "Pscr;": "\U0001d4ab",
+    "Psi;": "\u03a8",
+    "QUOT": "\"",
+    "QUOT;": "\"",
+    "Qfr;": "\U0001d514",
+    "Qopf;": "\u211a",
+    "Qscr;": "\U0001d4ac",
+    "RBarr;": "\u2910",
+    "REG": "\xae",
+    "REG;": "\xae",
+    "Racute;": "\u0154",
+    "Rang;": "\u27eb",
+    "Rarr;": "\u21a0",
+    "Rarrtl;": "\u2916",
+    "Rcaron;": "\u0158",
+    "Rcedil;": "\u0156",
+    "Rcy;": "\u0420",
+    "Re;": "\u211c",
+    "ReverseElement;": "\u220b",
+    "ReverseEquilibrium;": "\u21cb",
+    "ReverseUpEquilibrium;": "\u296f",
+    "Rfr;": "\u211c",
+    "Rho;": "\u03a1",
+    "RightAngleBracket;": "\u27e9",
+    "RightArrow;": "\u2192",
+    "RightArrowBar;": "\u21e5",
+    "RightArrowLeftArrow;": "\u21c4",
+    "RightCeiling;": "\u2309",
+    "RightDoubleBracket;": "\u27e7",
+    "RightDownTeeVector;": "\u295d",
+    "RightDownVector;": "\u21c2",
+    "RightDownVectorBar;": "\u2955",
+    "RightFloor;": "\u230b",
+    "RightTee;": "\u22a2",
+    "RightTeeArrow;": "\u21a6",
+    "RightTeeVector;": "\u295b",
+    "RightTriangle;": "\u22b3",
+    "RightTriangleBar;": "\u29d0",
+    "RightTriangleEqual;": "\u22b5",
+    "RightUpDownVector;": "\u294f",
+    "RightUpTeeVector;": "\u295c",
+    "RightUpVector;": "\u21be",
+    "RightUpVectorBar;": "\u2954",
+    "RightVector;": "\u21c0",
+    "RightVectorBar;": "\u2953",
+    "Rightarrow;": "\u21d2",
+    "Ropf;": "\u211d",
+    "RoundImplies;": "\u2970",
+    "Rrightarrow;": "\u21db",
+    "Rscr;": "\u211b",
+    "Rsh;": "\u21b1",
+    "RuleDelayed;": "\u29f4",
+    "SHCHcy;": "\u0429",
+    "SHcy;": "\u0428",
+    "SOFTcy;": "\u042c",
+    "Sacute;": "\u015a",
+    "Sc;": "\u2abc",
+    "Scaron;": "\u0160",
+    "Scedil;": "\u015e",
+    "Scirc;": "\u015c",
+    "Scy;": "\u0421",
+    "Sfr;": "\U0001d516",
+    "ShortDownArrow;": "\u2193",
+    "ShortLeftArrow;": "\u2190",
+    "ShortRightArrow;": "\u2192",
+    "ShortUpArrow;": "\u2191",
+    "Sigma;": "\u03a3",
+    "SmallCircle;": "\u2218",
+    "Sopf;": "\U0001d54a",
+    "Sqrt;": "\u221a",
+    "Square;": "\u25a1",
+    "SquareIntersection;": "\u2293",
+    "SquareSubset;": "\u228f",
+    "SquareSubsetEqual;": "\u2291",
+    "SquareSuperset;": "\u2290",
+    "SquareSupersetEqual;": "\u2292",
+    "SquareUnion;": "\u2294",
+    "Sscr;": "\U0001d4ae",
+    "Star;": "\u22c6",
+    "Sub;": "\u22d0",
+    "Subset;": "\u22d0",
+    "SubsetEqual;": "\u2286",
+    "Succeeds;": "\u227b",
+    "SucceedsEqual;": "\u2ab0",
+    "SucceedsSlantEqual;": "\u227d",
+    "SucceedsTilde;": "\u227f",
+    "SuchThat;": "\u220b",
+    "Sum;": "\u2211",
+    "Sup;": "\u22d1",
+    "Superset;": "\u2283",
+    "SupersetEqual;": "\u2287",
+    "Supset;": "\u22d1",
+    "THORN": "\xde",
+    "THORN;": "\xde",
+    "TRADE;": "\u2122",
+    "TSHcy;": "\u040b",
+    "TScy;": "\u0426",
+    "Tab;": "\t",
+    "Tau;": "\u03a4",
+    "Tcaron;": "\u0164",
+    "Tcedil;": "\u0162",
+    "Tcy;": "\u0422",
+    "Tfr;": "\U0001d517",
+    "Therefore;": "\u2234",
+    "Theta;": "\u0398",
+    "ThickSpace;": "\u205f\u200a",
+    "ThinSpace;": "\u2009",
+    "Tilde;": "\u223c",
+    "TildeEqual;": "\u2243",
+    "TildeFullEqual;": "\u2245",
+    "TildeTilde;": "\u2248",
+    "Topf;": "\U0001d54b",
+    "TripleDot;": "\u20db",
+    "Tscr;": "\U0001d4af",
+    "Tstrok;": "\u0166",
+    "Uacute": "\xda",
+    "Uacute;": "\xda",
+    "Uarr;": "\u219f",
+    "Uarrocir;": "\u2949",
+    "Ubrcy;": "\u040e",
+    "Ubreve;": "\u016c",
+    "Ucirc": "\xdb",
+    "Ucirc;": "\xdb",
+    "Ucy;": "\u0423",
+    "Udblac;": "\u0170",
+    "Ufr;": "\U0001d518",
+    "Ugrave": "\xd9",
+    "Ugrave;": "\xd9",
+    "Umacr;": "\u016a",
+    "UnderBar;": "_",
+    "UnderBrace;": "\u23df",
+    "UnderBracket;": "\u23b5",
+    "UnderParenthesis;": "\u23dd",
+    "Union;": "\u22c3",
+    "UnionPlus;": "\u228e",
+    "Uogon;": "\u0172",
+    "Uopf;": "\U0001d54c",
+    "UpArrow;": "\u2191",
+    "UpArrowBar;": "\u2912",
+    "UpArrowDownArrow;": "\u21c5",
+    "UpDownArrow;": "\u2195",
+    "UpEquilibrium;": "\u296e",
+    "UpTee;": "\u22a5",
+    "UpTeeArrow;": "\u21a5",
+    "Uparrow;": "\u21d1",
+    "Updownarrow;": "\u21d5",
+    "UpperLeftArrow;": "\u2196",
+    "UpperRightArrow;": "\u2197",
+    "Upsi;": "\u03d2",
+    "Upsilon;": "\u03a5",
+    "Uring;": "\u016e",
+    "Uscr;": "\U0001d4b0",
+    "Utilde;": "\u0168",
+    "Uuml": "\xdc",
+    "Uuml;": "\xdc",
+    "VDash;": "\u22ab",
+    "Vbar;": "\u2aeb",
+    "Vcy;": "\u0412",
+    "Vdash;": "\u22a9",
+    "Vdashl;": "\u2ae6",
+    "Vee;": "\u22c1",
+    "Verbar;": "\u2016",
+    "Vert;": "\u2016",
+    "VerticalBar;": "\u2223",
+    "VerticalLine;": "|",
+    "VerticalSeparator;": "\u2758",
+    "VerticalTilde;": "\u2240",
+    "VeryThinSpace;": "\u200a",
+    "Vfr;": "\U0001d519",
+    "Vopf;": "\U0001d54d",
+    "Vscr;": "\U0001d4b1",
+    "Vvdash;": "\u22aa",
+    "Wcirc;": "\u0174",
+    "Wedge;": "\u22c0",
+    "Wfr;": "\U0001d51a",
+    "Wopf;": "\U0001d54e",
+    "Wscr;": "\U0001d4b2",
+    "Xfr;": "\U0001d51b",
+    "Xi;": "\u039e",
+    "Xopf;": "\U0001d54f",
+    "Xscr;": "\U0001d4b3",
+    "YAcy;": "\u042f",
+    "YIcy;": "\u0407",
+    "YUcy;": "\u042e",
+    "Yacute": "\xdd",
+    "Yacute;": "\xdd",
+    "Ycirc;": "\u0176",
+    "Ycy;": "\u042b",
+    "Yfr;": "\U0001d51c",
+    "Yopf;": "\U0001d550",
+    "Yscr;": "\U0001d4b4",
+    "Yuml;": "\u0178",
+    "ZHcy;": "\u0416",
+    "Zacute;": "\u0179",
+    "Zcaron;": "\u017d",
+    "Zcy;": "\u0417",
+    "Zdot;": "\u017b",
+    "ZeroWidthSpace;": "\u200b",
+    "Zeta;": "\u0396",
+    "Zfr;": "\u2128",
+    "Zopf;": "\u2124",
+    "Zscr;": "\U0001d4b5",
+    "aacute": "\xe1",
+    "aacute;": "\xe1",
+    "abreve;": "\u0103",
+    "ac;": "\u223e",
+    "acE;": "\u223e\u0333",
+    "acd;": "\u223f",
+    "acirc": "\xe2",
+    "acirc;": "\xe2",
+    "acute": "\xb4",
+    "acute;": "\xb4",
+    "acy;": "\u0430",
+    "aelig": "\xe6",
+    "aelig;": "\xe6",
+    "af;": "\u2061",
+    "afr;": "\U0001d51e",
+    "agrave": "\xe0",
+    "agrave;": "\xe0",
+    "alefsym;": "\u2135",
+    "aleph;": "\u2135",
+    "alpha;": "\u03b1",
+    "amacr;": "\u0101",
+    "amalg;": "\u2a3f",
+    "amp": "&",
+    "amp;": "&",
+    "and;": "\u2227",
+    "andand;": "\u2a55",
+    "andd;": "\u2a5c",
+    "andslope;": "\u2a58",
+    "andv;": "\u2a5a",
+    "ang;": "\u2220",
+    "ange;": "\u29a4",
+    "angle;": "\u2220",
+    "angmsd;": "\u2221",
+    "angmsdaa;": "\u29a8",
+    "angmsdab;": "\u29a9",
+    "angmsdac;": "\u29aa",
+    "angmsdad;": "\u29ab",
+    "angmsdae;": "\u29ac",
+    "angmsdaf;": "\u29ad",
+    "angmsdag;": "\u29ae",
+    "angmsdah;": "\u29af",
+    "angrt;": "\u221f",
+    "angrtvb;": "\u22be",
+    "angrtvbd;": "\u299d",
+    "angsph;": "\u2222",
+    "angst;": "\xc5",
+    "angzarr;": "\u237c",
+    "aogon;": "\u0105",
+    "aopf;": "\U0001d552",
+    "ap;": "\u2248",
+    "apE;": "\u2a70",
+    "apacir;": "\u2a6f",
+    "ape;": "\u224a",
+    "apid;": "\u224b",
+    "apos;": "'",
+    "approx;": "\u2248",
+    "approxeq;": "\u224a",
+    "aring": "\xe5",
+    "aring;": "\xe5",
+    "ascr;": "\U0001d4b6",
+    "ast;": "*",
+    "asymp;": "\u2248",
+    "asympeq;": "\u224d",
+    "atilde": "\xe3",
+    "atilde;": "\xe3",
+    "auml": "\xe4",
+    "auml;": "\xe4",
+    "awconint;": "\u2233",
+    "awint;": "\u2a11",
+    "bNot;": "\u2aed",
+    "backcong;": "\u224c",
+    "backepsilon;": "\u03f6",
+    "backprime;": "\u2035",
+    "backsim;": "\u223d",
+    "backsimeq;": "\u22cd",
+    "barvee;": "\u22bd",
+    "barwed;": "\u2305",
+    "barwedge;": "\u2305",
+    "bbrk;": "\u23b5",
+    "bbrktbrk;": "\u23b6",
+    "bcong;": "\u224c",
+    "bcy;": "\u0431",
+    "bdquo;": "\u201e",
+    "becaus;": "\u2235",
+    "because;": "\u2235",
+    "bemptyv;": "\u29b0",
+    "bepsi;": "\u03f6",
+    "bernou;": "\u212c",
+    "beta;": "\u03b2",
+    "beth;": "\u2136",
+    "between;": "\u226c",
+    "bfr;": "\U0001d51f",
+    "bigcap;": "\u22c2",
+    "bigcirc;": "\u25ef",
+    "bigcup;": "\u22c3",
+    "bigodot;": "\u2a00",
+    "bigoplus;": "\u2a01",
+    "bigotimes;": "\u2a02",
+    "bigsqcup;": "\u2a06",
+    "bigstar;": "\u2605",
+    "bigtriangledown;": "\u25bd",
+    "bigtriangleup;": "\u25b3",
+    "biguplus;": "\u2a04",
+    "bigvee;": "\u22c1",
+    "bigwedge;": "\u22c0",
+    "bkarow;": "\u290d",
+    "blacklozenge;": "\u29eb",
+    "blacksquare;": "\u25aa",
+    "blacktriangle;": "\u25b4",
+    "blacktriangledown;": "\u25be",
+    "blacktriangleleft;": "\u25c2",
+    "blacktriangleright;": "\u25b8",
+    "blank;": "\u2423",
+    "blk12;": "\u2592",
+    "blk14;": "\u2591",
+    "blk34;": "\u2593",
+    "block;": "\u2588",
+    "bne;": "=\u20e5",
+    "bnequiv;": "\u2261\u20e5",
+    "bnot;": "\u2310",
+    "bopf;": "\U0001d553",
+    "bot;": "\u22a5",
+    "bottom;": "\u22a5",
+    "bowtie;": "\u22c8",
+    "boxDL;": "\u2557",
+    "boxDR;": "\u2554",
+    "boxDl;": "\u2556",
+    "boxDr;": "\u2553",
+    "boxH;": "\u2550",
+    "boxHD;": "\u2566",
+    "boxHU;": "\u2569",
+    "boxHd;": "\u2564",
+    "boxHu;": "\u2567",
+    "boxUL;": "\u255d",
+    "boxUR;": "\u255a",
+    "boxUl;": "\u255c",
+    "boxUr;": "\u2559",
+    "boxV;": "\u2551",
+    "boxVH;": "\u256c",
+    "boxVL;": "\u2563",
+    "boxVR;": "\u2560",
+    "boxVh;": "\u256b",
+    "boxVl;": "\u2562",
+    "boxVr;": "\u255f",
+    "boxbox;": "\u29c9",
+    "boxdL;": "\u2555",
+    "boxdR;": "\u2552",
+    "boxdl;": "\u2510",
+    "boxdr;": "\u250c",
+    "boxh;": "\u2500",
+    "boxhD;": "\u2565",
+    "boxhU;": "\u2568",
+    "boxhd;": "\u252c",
+    "boxhu;": "\u2534",
+    "boxminus;": "\u229f",
+    "boxplus;": "\u229e",
+    "boxtimes;": "\u22a0",
+    "boxuL;": "\u255b",
+    "boxuR;": "\u2558",
+    "boxul;": "\u2518",
+    "boxur;": "\u2514",
+    "boxv;": "\u2502",
+    "boxvH;": "\u256a",
+    "boxvL;": "\u2561",
+    "boxvR;": "\u255e",
+    "boxvh;": "\u253c",
+    "boxvl;": "\u2524",
+    "boxvr;": "\u251c",
+    "bprime;": "\u2035",
+    "breve;": "\u02d8",
+    "brvbar": "\xa6",
+    "brvbar;": "\xa6",
+    "bscr;": "\U0001d4b7",
+    "bsemi;": "\u204f",
+    "bsim;": "\u223d",
+    "bsime;": "\u22cd",
+    "bsol;": "\\",
+    "bsolb;": "\u29c5",
+    "bsolhsub;": "\u27c8",
+    "bull;": "\u2022",
+    "bullet;": "\u2022",
+    "bump;": "\u224e",
+    "bumpE;": "\u2aae",
+    "bumpe;": "\u224f",
+    "bumpeq;": "\u224f",
+    "cacute;": "\u0107",
+    "cap;": "\u2229",
+    "capand;": "\u2a44",
+    "capbrcup;": "\u2a49",
+    "capcap;": "\u2a4b",
+    "capcup;": "\u2a47",
+    "capdot;": "\u2a40",
+    "caps;": "\u2229\ufe00",
+    "caret;": "\u2041",
+    "caron;": "\u02c7",
+    "ccaps;": "\u2a4d",
+    "ccaron;": "\u010d",
+    "ccedil": "\xe7",
+    "ccedil;": "\xe7",
+    "ccirc;": "\u0109",
+    "ccups;": "\u2a4c",
+    "ccupssm;": "\u2a50",
+    "cdot;": "\u010b",
+    "cedil": "\xb8",
+    "cedil;": "\xb8",
+    "cemptyv;": "\u29b2",
+    "cent": "\xa2",
+    "cent;": "\xa2",
+    "centerdot;": "\xb7",
+    "cfr;": "\U0001d520",
+    "chcy;": "\u0447",
+    "check;": "\u2713",
+    "checkmark;": "\u2713",
+    "chi;": "\u03c7",
+    "cir;": "\u25cb",
+    "cirE;": "\u29c3",
+    "circ;": "\u02c6",
+    "circeq;": "\u2257",
+    "circlearrowleft;": "\u21ba",
+    "circlearrowright;": "\u21bb",
+    "circledR;": "\xae",
+    "circledS;": "\u24c8",
+    "circledast;": "\u229b",
+    "circledcirc;": "\u229a",
+    "circleddash;": "\u229d",
+    "cire;": "\u2257",
+    "cirfnint;": "\u2a10",
+    "cirmid;": "\u2aef",
+    "cirscir;": "\u29c2",
+    "clubs;": "\u2663",
+    "clubsuit;": "\u2663",
+    "colon;": ":",
+    "colone;": "\u2254",
+    "coloneq;": "\u2254",
+    "comma;": ",",
+    "commat;": "@",
+    "comp;": "\u2201",
+    "compfn;": "\u2218",
+    "complement;": "\u2201",
+    "complexes;": "\u2102",
+    "cong;": "\u2245",
+    "congdot;": "\u2a6d",
+    "conint;": "\u222e",
+    "copf;": "\U0001d554",
+    "coprod;": "\u2210",
+    "copy": "\xa9",
+    "copy;": "\xa9",
+    "copysr;": "\u2117",
+    "crarr;": "\u21b5",
+    "cross;": "\u2717",
+    "cscr;": "\U0001d4b8",
+    "csub;": "\u2acf",
+    "csube;": "\u2ad1",
+    "csup;": "\u2ad0",
+    "csupe;": "\u2ad2",
+    "ctdot;": "\u22ef",
+    "cudarrl;": "\u2938",
+    "cudarrr;": "\u2935",
+    "cuepr;": "\u22de",
+    "cuesc;": "\u22df",
+    "cularr;": "\u21b6",
+    "cularrp;": "\u293d",
+    "cup;": "\u222a",
+    "cupbrcap;": "\u2a48",
+    "cupcap;": "\u2a46",
+    "cupcup;": "\u2a4a",
+    "cupdot;": "\u228d",
+    "cupor;": "\u2a45",
+    "cups;": "\u222a\ufe00",
+    "curarr;": "\u21b7",
+    "curarrm;": "\u293c",
+    "curlyeqprec;": "\u22de",
+    "curlyeqsucc;": "\u22df",
+    "curlyvee;": "\u22ce",
+    "curlywedge;": "\u22cf",
+    "curren": "\xa4",
+    "curren;": "\xa4",
+    "curvearrowleft;": "\u21b6",
+    "curvearrowright;": "\u21b7",
+    "cuvee;": "\u22ce",
+    "cuwed;": "\u22cf",
+    "cwconint;": "\u2232",
+    "cwint;": "\u2231",
+    "cylcty;": "\u232d",
+    "dArr;": "\u21d3",
+    "dHar;": "\u2965",
+    "dagger;": "\u2020",
+    "daleth;": "\u2138",
+    "darr;": "\u2193",
+    "dash;": "\u2010",
+    "dashv;": "\u22a3",
+    "dbkarow;": "\u290f",
+    "dblac;": "\u02dd",
+    "dcaron;": "\u010f",
+    "dcy;": "\u0434",
+    "dd;": "\u2146",
+    "ddagger;": "\u2021",
+    "ddarr;": "\u21ca",
+    "ddotseq;": "\u2a77",
+    "deg": "\xb0",
+    "deg;": "\xb0",
+    "delta;": "\u03b4",
+    "demptyv;": "\u29b1",
+    "dfisht;": "\u297f",
+    "dfr;": "\U0001d521",
+    "dharl;": "\u21c3",
+    "dharr;": "\u21c2",
+    "diam;": "\u22c4",
+    "diamond;": "\u22c4",
+    "diamondsuit;": "\u2666",
+    "diams;": "\u2666",
+    "die;": "\xa8",
+    "digamma;": "\u03dd",
+    "disin;": "\u22f2",
+    "div;": "\xf7",
+    "divide": "\xf7",
+    "divide;": "\xf7",
+    "divideontimes;": "\u22c7",
+    "divonx;": "\u22c7",
+    "djcy;": "\u0452",
+    "dlcorn;": "\u231e",
+    "dlcrop;": "\u230d",
+    "dollar;": "$",
+    "dopf;": "\U0001d555",
+    "dot;": "\u02d9",
+    "doteq;": "\u2250",
+    "doteqdot;": "\u2251",
+    "dotminus;": "\u2238",
+    "dotplus;": "\u2214",
+    "dotsquare;": "\u22a1",
+    "doublebarwedge;": "\u2306",
+    "downarrow;": "\u2193",
+    "downdownarrows;": "\u21ca",
+    "downharpoonleft;": "\u21c3",
+    "downharpoonright;": "\u21c2",
+    "drbkarow;": "\u2910",
+    "drcorn;": "\u231f",
+    "drcrop;": "\u230c",
+    "dscr;": "\U0001d4b9",
+    "dscy;": "\u0455",
+    "dsol;": "\u29f6",
+    "dstrok;": "\u0111",
+    "dtdot;": "\u22f1",
+    "dtri;": "\u25bf",
+    "dtrif;": "\u25be",
+    "duarr;": "\u21f5",
+    "duhar;": "\u296f",
+    "dwangle;": "\u29a6",
+    "dzcy;": "\u045f",
+    "dzigrarr;": "\u27ff",
+    "eDDot;": "\u2a77",
+    "eDot;": "\u2251",
+    "eacute": "\xe9",
+    "eacute;": "\xe9",
+    "easter;": "\u2a6e",
+    "ecaron;": "\u011b",
+    "ecir;": "\u2256",
+    "ecirc": "\xea",
+    "ecirc;": "\xea",
+    "ecolon;": "\u2255",
+    "ecy;": "\u044d",
+    "edot;": "\u0117",
+    "ee;": "\u2147",
+    "efDot;": "\u2252",
+    "efr;": "\U0001d522",
+    "eg;": "\u2a9a",
+    "egrave": "\xe8",
+    "egrave;": "\xe8",
+    "egs;": "\u2a96",
+    "egsdot;": "\u2a98",
+    "el;": "\u2a99",
+    "elinters;": "\u23e7",
+    "ell;": "\u2113",
+    "els;": "\u2a95",
+    "elsdot;": "\u2a97",
+    "emacr;": "\u0113",
+    "empty;": "\u2205",
+    "emptyset;": "\u2205",
+    "emptyv;": "\u2205",
+    "emsp13;": "\u2004",
+    "emsp14;": "\u2005",
+    "emsp;": "\u2003",
+    "eng;": "\u014b",
+    "ensp;": "\u2002",
+    "eogon;": "\u0119",
+    "eopf;": "\U0001d556",
+    "epar;": "\u22d5",
+    "eparsl;": "\u29e3",
+    "eplus;": "\u2a71",
+    "epsi;": "\u03b5",
+    "epsilon;": "\u03b5",
+    "epsiv;": "\u03f5",
+    "eqcirc;": "\u2256",
+    "eqcolon;": "\u2255",
+    "eqsim;": "\u2242",
+    "eqslantgtr;": "\u2a96",
+    "eqslantless;": "\u2a95",
+    "equals;": "=",
+    "equest;": "\u225f",
+    "equiv;": "\u2261",
+    "equivDD;": "\u2a78",
+    "eqvparsl;": "\u29e5",
+    "erDot;": "\u2253",
+    "erarr;": "\u2971",
+    "escr;": "\u212f",
+    "esdot;": "\u2250",
+    "esim;": "\u2242",
+    "eta;": "\u03b7",
+    "eth": "\xf0",
+    "eth;": "\xf0",
+    "euml": "\xeb",
+    "euml;": "\xeb",
+    "euro;": "\u20ac",
+    "excl;": "!",
+    "exist;": "\u2203",
+    "expectation;": "\u2130",
+    "exponentiale;": "\u2147",
+    "fallingdotseq;": "\u2252",
+    "fcy;": "\u0444",
+    "female;": "\u2640",
+    "ffilig;": "\ufb03",
+    "fflig;": "\ufb00",
+    "ffllig;": "\ufb04",
+    "ffr;": "\U0001d523",
+    "filig;": "\ufb01",
+    "fjlig;": "fj",
+    "flat;": "\u266d",
+    "fllig;": "\ufb02",
+    "fltns;": "\u25b1",
+    "fnof;": "\u0192",
+    "fopf;": "\U0001d557",
+    "forall;": "\u2200",
+    "fork;": "\u22d4",
+    "forkv;": "\u2ad9",
+    "fpartint;": "\u2a0d",
+    "frac12": "\xbd",
+    "frac12;": "\xbd",
+    "frac13;": "\u2153",
+    "frac14": "\xbc",
+    "frac14;": "\xbc",
+    "frac15;": "\u2155",
+    "frac16;": "\u2159",
+    "frac18;": "\u215b",
+    "frac23;": "\u2154",
+    "frac25;": "\u2156",
+    "frac34": "\xbe",
+    "frac34;": "\xbe",
+    "frac35;": "\u2157",
+    "frac38;": "\u215c",
+    "frac45;": "\u2158",
+    "frac56;": "\u215a",
+    "frac58;": "\u215d",
+    "frac78;": "\u215e",
+    "frasl;": "\u2044",
+    "frown;": "\u2322",
+    "fscr;": "\U0001d4bb",
+    "gE;": "\u2267",
+    "gEl;": "\u2a8c",
+    "gacute;": "\u01f5",
+    "gamma;": "\u03b3",
+    "gammad;": "\u03dd",
+    "gap;": "\u2a86",
+    "gbreve;": "\u011f",
+    "gcirc;": "\u011d",
+    "gcy;": "\u0433",
+    "gdot;": "\u0121",
+    "ge;": "\u2265",
+    "gel;": "\u22db",
+    "geq;": "\u2265",
+    "geqq;": "\u2267",
+    "geqslant;": "\u2a7e",
+    "ges;": "\u2a7e",
+    "gescc;": "\u2aa9",
+    "gesdot;": "\u2a80",
+    "gesdoto;": "\u2a82",
+    "gesdotol;": "\u2a84",
+    "gesl;": "\u22db\ufe00",
+    "gesles;": "\u2a94",
+    "gfr;": "\U0001d524",
+    "gg;": "\u226b",
+    "ggg;": "\u22d9",
+    "gimel;": "\u2137",
+    "gjcy;": "\u0453",
+    "gl;": "\u2277",
+    "glE;": "\u2a92",
+    "gla;": "\u2aa5",
+    "glj;": "\u2aa4",
+    "gnE;": "\u2269",
+    "gnap;": "\u2a8a",
+    "gnapprox;": "\u2a8a",
+    "gne;": "\u2a88",
+    "gneq;": "\u2a88",
+    "gneqq;": "\u2269",
+    "gnsim;": "\u22e7",
+    "gopf;": "\U0001d558",
+    "grave;": "`",
+    "gscr;": "\u210a",
+    "gsim;": "\u2273",
+    "gsime;": "\u2a8e",
+    "gsiml;": "\u2a90",
+    "gt": ">",
+    "gt;": ">",
+    "gtcc;": "\u2aa7",
+    "gtcir;": "\u2a7a",
+    "gtdot;": "\u22d7",
+    "gtlPar;": "\u2995",
+    "gtquest;": "\u2a7c",
+    "gtrapprox;": "\u2a86",
+    "gtrarr;": "\u2978",
+    "gtrdot;": "\u22d7",
+    "gtreqless;": "\u22db",
+    "gtreqqless;": "\u2a8c",
+    "gtrless;": "\u2277",
+    "gtrsim;": "\u2273",
+    "gvertneqq;": "\u2269\ufe00",
+    "gvnE;": "\u2269\ufe00",
+    "hArr;": "\u21d4",
+    "hairsp;": "\u200a",
+    "half;": "\xbd",
+    "hamilt;": "\u210b",
+    "hardcy;": "\u044a",
+    "harr;": "\u2194",
+    "harrcir;": "\u2948",
+    "harrw;": "\u21ad",
+    "hbar;": "\u210f",
+    "hcirc;": "\u0125",
+    "hearts;": "\u2665",
+    "heartsuit;": "\u2665",
+    "hellip;": "\u2026",
+    "hercon;": "\u22b9",
+    "hfr;": "\U0001d525",
+    "hksearow;": "\u2925",
+    "hkswarow;": "\u2926",
+    "hoarr;": "\u21ff",
+    "homtht;": "\u223b",
+    "hookleftarrow;": "\u21a9",
+    "hookrightarrow;": "\u21aa",
+    "hopf;": "\U0001d559",
+    "horbar;": "\u2015",
+    "hscr;": "\U0001d4bd",
+    "hslash;": "\u210f",
+    "hstrok;": "\u0127",
+    "hybull;": "\u2043",
+    "hyphen;": "\u2010",
+    "iacute": "\xed",
+    "iacute;": "\xed",
+    "ic;": "\u2063",
+    "icirc": "\xee",
+    "icirc;": "\xee",
+    "icy;": "\u0438",
+    "iecy;": "\u0435",
+    "iexcl": "\xa1",
+    "iexcl;": "\xa1",
+    "iff;": "\u21d4",
+    "ifr;": "\U0001d526",
+    "igrave": "\xec",
+    "igrave;": "\xec",
+    "ii;": "\u2148",
+    "iiiint;": "\u2a0c",
+    "iiint;": "\u222d",
+    "iinfin;": "\u29dc",
+    "iiota;": "\u2129",
+    "ijlig;": "\u0133",
+    "imacr;": "\u012b",
+    "image;": "\u2111",
+    "imagline;": "\u2110",
+    "imagpart;": "\u2111",
+    "imath;": "\u0131",
+    "imof;": "\u22b7",
+    "imped;": "\u01b5",
+    "in;": "\u2208",
+    "incare;": "\u2105",
+    "infin;": "\u221e",
+    "infintie;": "\u29dd",
+    "inodot;": "\u0131",
+    "int;": "\u222b",
+    "intcal;": "\u22ba",
+    "integers;": "\u2124",
+    "intercal;": "\u22ba",
+    "intlarhk;": "\u2a17",
+    "intprod;": "\u2a3c",
+    "iocy;": "\u0451",
+    "iogon;": "\u012f",
+    "iopf;": "\U0001d55a",
+    "iota;": "\u03b9",
+    "iprod;": "\u2a3c",
+    "iquest": "\xbf",
+    "iquest;": "\xbf",
+    "iscr;": "\U0001d4be",
+    "isin;": "\u2208",
+    "isinE;": "\u22f9",
+    "isindot;": "\u22f5",
+    "isins;": "\u22f4",
+    "isinsv;": "\u22f3",
+    "isinv;": "\u2208",
+    "it;": "\u2062",
+    "itilde;": "\u0129",
+    "iukcy;": "\u0456",
+    "iuml": "\xef",
+    "iuml;": "\xef",
+    "jcirc;": "\u0135",
+    "jcy;": "\u0439",
+    "jfr;": "\U0001d527",
+    "jmath;": "\u0237",
+    "jopf;": "\U0001d55b",
+    "jscr;": "\U0001d4bf",
+    "jsercy;": "\u0458",
+    "jukcy;": "\u0454",
+    "kappa;": "\u03ba",
+    "kappav;": "\u03f0",
+    "kcedil;": "\u0137",
+    "kcy;": "\u043a",
+    "kfr;": "\U0001d528",
+    "kgreen;": "\u0138",
+    "khcy;": "\u0445",
+    "kjcy;": "\u045c",
+    "kopf;": "\U0001d55c",
+    "kscr;": "\U0001d4c0",
+    "lAarr;": "\u21da",
+    "lArr;": "\u21d0",
+    "lAtail;": "\u291b",
+    "lBarr;": "\u290e",
+    "lE;": "\u2266",
+    "lEg;": "\u2a8b",
+    "lHar;": "\u2962",
+    "lacute;": "\u013a",
+    "laemptyv;": "\u29b4",
+    "lagran;": "\u2112",
+    "lambda;": "\u03bb",
+    "lang;": "\u27e8",
+    "langd;": "\u2991",
+    "langle;": "\u27e8",
+    "lap;": "\u2a85",
+    "laquo": "\xab",
+    "laquo;": "\xab",
+    "larr;": "\u2190",
+    "larrb;": "\u21e4",
+    "larrbfs;": "\u291f",
+    "larrfs;": "\u291d",
+    "larrhk;": "\u21a9",
+    "larrlp;": "\u21ab",
+    "larrpl;": "\u2939",
+    "larrsim;": "\u2973",
+    "larrtl;": "\u21a2",
+    "lat;": "\u2aab",
+    "latail;": "\u2919",
+    "late;": "\u2aad",
+    "lates;": "\u2aad\ufe00",
+    "lbarr;": "\u290c",
+    "lbbrk;": "\u2772",
+    "lbrace;": "{",
+    "lbrack;": "[",
+    "lbrke;": "\u298b",
+    "lbrksld;": "\u298f",
+    "lbrkslu;": "\u298d",
+    "lcaron;": "\u013e",
+    "lcedil;": "\u013c",
+    "lceil;": "\u2308",
+    "lcub;": "{",
+    "lcy;": "\u043b",
+    "ldca;": "\u2936",
+    "ldquo;": "\u201c",
+    "ldquor;": "\u201e",
+    "ldrdhar;": "\u2967",
+    "ldrushar;": "\u294b",
+    "ldsh;": "\u21b2",
+    "le;": "\u2264",
+    "leftarrow;": "\u2190",
+    "leftarrowtail;": "\u21a2",
+    "leftharpoondown;": "\u21bd",
+    "leftharpoonup;": "\u21bc",
+    "leftleftarrows;": "\u21c7",
+    "leftrightarrow;": "\u2194",
+    "leftrightarrows;": "\u21c6",
+    "leftrightharpoons;": "\u21cb",
+    "leftrightsquigarrow;": "\u21ad",
+    "leftthreetimes;": "\u22cb",
+    "leg;": "\u22da",
+    "leq;": "\u2264",
+    "leqq;": "\u2266",
+    "leqslant;": "\u2a7d",
+    "les;": "\u2a7d",
+    "lescc;": "\u2aa8",
+    "lesdot;": "\u2a7f",
+    "lesdoto;": "\u2a81",
+    "lesdotor;": "\u2a83",
+    "lesg;": "\u22da\ufe00",
+    "lesges;": "\u2a93",
+    "lessapprox;": "\u2a85",
+    "lessdot;": "\u22d6",
+    "lesseqgtr;": "\u22da",
+    "lesseqqgtr;": "\u2a8b",
+    "lessgtr;": "\u2276",
+    "lesssim;": "\u2272",
+    "lfisht;": "\u297c",
+    "lfloor;": "\u230a",
+    "lfr;": "\U0001d529",
+    "lg;": "\u2276",
+    "lgE;": "\u2a91",
+    "lhard;": "\u21bd",
+    "lharu;": "\u21bc",
+    "lharul;": "\u296a",
+    "lhblk;": "\u2584",
+    "ljcy;": "\u0459",
+    "ll;": "\u226a",
+    "llarr;": "\u21c7",
+    "llcorner;": "\u231e",
+    "llhard;": "\u296b",
+    "lltri;": "\u25fa",
+    "lmidot;": "\u0140",
+    "lmoust;": "\u23b0",
+    "lmoustache;": "\u23b0",
+    "lnE;": "\u2268",
+    "lnap;": "\u2a89",
+    "lnapprox;": "\u2a89",
+    "lne;": "\u2a87",
+    "lneq;": "\u2a87",
+    "lneqq;": "\u2268",
+    "lnsim;": "\u22e6",
+    "loang;": "\u27ec",
+    "loarr;": "\u21fd",
+    "lobrk;": "\u27e6",
+    "longleftarrow;": "\u27f5",
+    "longleftrightarrow;": "\u27f7",
+    "longmapsto;": "\u27fc",
+    "longrightarrow;": "\u27f6",
+    "looparrowleft;": "\u21ab",
+    "looparrowright;": "\u21ac",
+    "lopar;": "\u2985",
+    "lopf;": "\U0001d55d",
+    "loplus;": "\u2a2d",
+    "lotimes;": "\u2a34",
+    "lowast;": "\u2217",
+    "lowbar;": "_",
+    "loz;": "\u25ca",
+    "lozenge;": "\u25ca",
+    "lozf;": "\u29eb",
+    "lpar;": "(",
+    "lparlt;": "\u2993",
+    "lrarr;": "\u21c6",
+    "lrcorner;": "\u231f",
+    "lrhar;": "\u21cb",
+    "lrhard;": "\u296d",
+    "lrm;": "\u200e",
+    "lrtri;": "\u22bf",
+    "lsaquo;": "\u2039",
+    "lscr;": "\U0001d4c1",
+    "lsh;": "\u21b0",
+    "lsim;": "\u2272",
+    "lsime;": "\u2a8d",
+    "lsimg;": "\u2a8f",
+    "lsqb;": "[",
+    "lsquo;": "\u2018",
+    "lsquor;": "\u201a",
+    "lstrok;": "\u0142",
+    "lt": "<",
+    "lt;": "<",
+    "ltcc;": "\u2aa6",
+    "ltcir;": "\u2a79",
+    "ltdot;": "\u22d6",
+    "lthree;": "\u22cb",
+    "ltimes;": "\u22c9",
+    "ltlarr;": "\u2976",
+    "ltquest;": "\u2a7b",
+    "ltrPar;": "\u2996",
+    "ltri;": "\u25c3",
+    "ltrie;": "\u22b4",
+    "ltrif;": "\u25c2",
+    "lurdshar;": "\u294a",
+    "luruhar;": "\u2966",
+    "lvertneqq;": "\u2268\ufe00",
+    "lvnE;": "\u2268\ufe00",
+    "mDDot;": "\u223a",
+    "macr": "\xaf",
+    "macr;": "\xaf",
+    "male;": "\u2642",
+    "malt;": "\u2720",
+    "maltese;": "\u2720",
+    "map;": "\u21a6",
+    "mapsto;": "\u21a6",
+    "mapstodown;": "\u21a7",
+    "mapstoleft;": "\u21a4",
+    "mapstoup;": "\u21a5",
+    "marker;": "\u25ae",
+    "mcomma;": "\u2a29",
+    "mcy;": "\u043c",
+    "mdash;": "\u2014",
+    "measuredangle;": "\u2221",
+    "mfr;": "\U0001d52a",
+    "mho;": "\u2127",
+    "micro": "\xb5",
+    "micro;": "\xb5",
+    "mid;": "\u2223",
+    "midast;": "*",
+    "midcir;": "\u2af0",
+    "middot": "\xb7",
+    "middot;": "\xb7",
+    "minus;": "\u2212",
+    "minusb;": "\u229f",
+    "minusd;": "\u2238",
+    "minusdu;": "\u2a2a",
+    "mlcp;": "\u2adb",
+    "mldr;": "\u2026",
+    "mnplus;": "\u2213",
+    "models;": "\u22a7",
+    "mopf;": "\U0001d55e",
+    "mp;": "\u2213",
+    "mscr;": "\U0001d4c2",
+    "mstpos;": "\u223e",
+    "mu;": "\u03bc",
+    "multimap;": "\u22b8",
+    "mumap;": "\u22b8",
+    "nGg;": "\u22d9\u0338",
+    "nGt;": "\u226b\u20d2",
+    "nGtv;": "\u226b\u0338",
+    "nLeftarrow;": "\u21cd",
+    "nLeftrightarrow;": "\u21ce",
+    "nLl;": "\u22d8\u0338",
+    "nLt;": "\u226a\u20d2",
+    "nLtv;": "\u226a\u0338",
+    "nRightarrow;": "\u21cf",
+    "nVDash;": "\u22af",
+    "nVdash;": "\u22ae",
+    "nabla;": "\u2207",
+    "nacute;": "\u0144",
+    "nang;": "\u2220\u20d2",
+    "nap;": "\u2249",
+    "napE;": "\u2a70\u0338",
+    "napid;": "\u224b\u0338",
+    "napos;": "\u0149",
+    "napprox;": "\u2249",
+    "natur;": "\u266e",
+    "natural;": "\u266e",
+    "naturals;": "\u2115",
+    "nbsp": "\xa0",
+    "nbsp;": "\xa0",
+    "nbump;": "\u224e\u0338",
+    "nbumpe;": "\u224f\u0338",
+    "ncap;": "\u2a43",
+    "ncaron;": "\u0148",
+    "ncedil;": "\u0146",
+    "ncong;": "\u2247",
+    "ncongdot;": "\u2a6d\u0338",
+    "ncup;": "\u2a42",
+    "ncy;": "\u043d",
+    "ndash;": "\u2013",
+    "ne;": "\u2260",
+    "neArr;": "\u21d7",
+    "nearhk;": "\u2924",
+    "nearr;": "\u2197",
+    "nearrow;": "\u2197",
+    "nedot;": "\u2250\u0338",
+    "nequiv;": "\u2262",
+    "nesear;": "\u2928",
+    "nesim;": "\u2242\u0338",
+    "nexist;": "\u2204",
+    "nexists;": "\u2204",
+    "nfr;": "\U0001d52b",
+    "ngE;": "\u2267\u0338",
+    "nge;": "\u2271",
+    "ngeq;": "\u2271",
+    "ngeqq;": "\u2267\u0338",
+    "ngeqslant;": "\u2a7e\u0338",
+    "nges;": "\u2a7e\u0338",
+    "ngsim;": "\u2275",
+    "ngt;": "\u226f",
+    "ngtr;": "\u226f",
+    "nhArr;": "\u21ce",
+    "nharr;": "\u21ae",
+    "nhpar;": "\u2af2",
+    "ni;": "\u220b",
+    "nis;": "\u22fc",
+    "nisd;": "\u22fa",
+    "niv;": "\u220b",
+    "njcy;": "\u045a",
+    "nlArr;": "\u21cd",
+    "nlE;": "\u2266\u0338",
+    "nlarr;": "\u219a",
+    "nldr;": "\u2025",
+    "nle;": "\u2270",
+    "nleftarrow;": "\u219a",
+    "nleftrightarrow;": "\u21ae",
+    "nleq;": "\u2270",
+    "nleqq;": "\u2266\u0338",
+    "nleqslant;": "\u2a7d\u0338",
+    "nles;": "\u2a7d\u0338",
+    "nless;": "\u226e",
+    "nlsim;": "\u2274",
+    "nlt;": "\u226e",
+    "nltri;": "\u22ea",
+    "nltrie;": "\u22ec",
+    "nmid;": "\u2224",
+    "nopf;": "\U0001d55f",
+    "not": "\xac",
+    "not;": "\xac",
+    "notin;": "\u2209",
+    "notinE;": "\u22f9\u0338",
+    "notindot;": "\u22f5\u0338",
+    "notinva;": "\u2209",
+    "notinvb;": "\u22f7",
+    "notinvc;": "\u22f6",
+    "notni;": "\u220c",
+    "notniva;": "\u220c",
+    "notnivb;": "\u22fe",
+    "notnivc;": "\u22fd",
+    "npar;": "\u2226",
+    "nparallel;": "\u2226",
+    "nparsl;": "\u2afd\u20e5",
+    "npart;": "\u2202\u0338",
+    "npolint;": "\u2a14",
+    "npr;": "\u2280",
+    "nprcue;": "\u22e0",
+    "npre;": "\u2aaf\u0338",
+    "nprec;": "\u2280",
+    "npreceq;": "\u2aaf\u0338",
+    "nrArr;": "\u21cf",
+    "nrarr;": "\u219b",
+    "nrarrc;": "\u2933\u0338",
+    "nrarrw;": "\u219d\u0338",
+    "nrightarrow;": "\u219b",
+    "nrtri;": "\u22eb",
+    "nrtrie;": "\u22ed",
+    "nsc;": "\u2281",
+    "nsccue;": "\u22e1",
+    "nsce;": "\u2ab0\u0338",
+    "nscr;": "\U0001d4c3",
+    "nshortmid;": "\u2224",
+    "nshortparallel;": "\u2226",
+    "nsim;": "\u2241",
+    "nsime;": "\u2244",
+    "nsimeq;": "\u2244",
+    "nsmid;": "\u2224",
+    "nspar;": "\u2226",
+    "nsqsube;": "\u22e2",
+    "nsqsupe;": "\u22e3",
+    "nsub;": "\u2284",
+    "nsubE;": "\u2ac5\u0338",
+    "nsube;": "\u2288",
+    "nsubset;": "\u2282\u20d2",
+    "nsubseteq;": "\u2288",
+    "nsubseteqq;": "\u2ac5\u0338",
+    "nsucc;": "\u2281",
+    "nsucceq;": "\u2ab0\u0338",
+    "nsup;": "\u2285",
+    "nsupE;": "\u2ac6\u0338",
+    "nsupe;": "\u2289",
+    "nsupset;": "\u2283\u20d2",
+    "nsupseteq;": "\u2289",
+    "nsupseteqq;": "\u2ac6\u0338",
+    "ntgl;": "\u2279",
+    "ntilde": "\xf1",
+    "ntilde;": "\xf1",
+    "ntlg;": "\u2278",
+    "ntriangleleft;": "\u22ea",
+    "ntrianglelefteq;": "\u22ec",
+    "ntriangleright;": "\u22eb",
+    "ntrianglerighteq;": "\u22ed",
+    "nu;": "\u03bd",
+    "num;": "#",
+    "numero;": "\u2116",
+    "numsp;": "\u2007",
+    "nvDash;": "\u22ad",
+    "nvHarr;": "\u2904",
+    "nvap;": "\u224d\u20d2",
+    "nvdash;": "\u22ac",
+    "nvge;": "\u2265\u20d2",
+    "nvgt;": ">\u20d2",
+    "nvinfin;": "\u29de",
+    "nvlArr;": "\u2902",
+    "nvle;": "\u2264\u20d2",
+    "nvlt;": "<\u20d2",
+    "nvltrie;": "\u22b4\u20d2",
+    "nvrArr;": "\u2903",
+    "nvrtrie;": "\u22b5\u20d2",
+    "nvsim;": "\u223c\u20d2",
+    "nwArr;": "\u21d6",
+    "nwarhk;": "\u2923",
+    "nwarr;": "\u2196",
+    "nwarrow;": "\u2196",
+    "nwnear;": "\u2927",
+    "oS;": "\u24c8",
+    "oacute": "\xf3",
+    "oacute;": "\xf3",
+    "oast;": "\u229b",
+    "ocir;": "\u229a",
+    "ocirc": "\xf4",
+    "ocirc;": "\xf4",
+    "ocy;": "\u043e",
+    "odash;": "\u229d",
+    "odblac;": "\u0151",
+    "odiv;": "\u2a38",
+    "odot;": "\u2299",
+    "odsold;": "\u29bc",
+    "oelig;": "\u0153",
+    "ofcir;": "\u29bf",
+    "ofr;": "\U0001d52c",
+    "ogon;": "\u02db",
+    "ograve": "\xf2",
+    "ograve;": "\xf2",
+    "ogt;": "\u29c1",
+    "ohbar;": "\u29b5",
+    "ohm;": "\u03a9",
+    "oint;": "\u222e",
+    "olarr;": "\u21ba",
+    "olcir;": "\u29be",
+    "olcross;": "\u29bb",
+    "oline;": "\u203e",
+    "olt;": "\u29c0",
+    "omacr;": "\u014d",
+    "omega;": "\u03c9",
+    "omicron;": "\u03bf",
+    "omid;": "\u29b6",
+    "ominus;": "\u2296",
+    "oopf;": "\U0001d560",
+    "opar;": "\u29b7",
+    "operp;": "\u29b9",
+    "oplus;": "\u2295",
+    "or;": "\u2228",
+    "orarr;": "\u21bb",
+    "ord;": "\u2a5d",
+    "order;": "\u2134",
+    "orderof;": "\u2134",
+    "ordf": "\xaa",
+    "ordf;": "\xaa",
+    "ordm": "\xba",
+    "ordm;": "\xba",
+    "origof;": "\u22b6",
+    "oror;": "\u2a56",
+    "orslope;": "\u2a57",
+    "orv;": "\u2a5b",
+    "oscr;": "\u2134",
+    "oslash": "\xf8",
+    "oslash;": "\xf8",
+    "osol;": "\u2298",
+    "otilde": "\xf5",
+    "otilde;": "\xf5",
+    "otimes;": "\u2297",
+    "otimesas;": "\u2a36",
+    "ouml": "\xf6",
+    "ouml;": "\xf6",
+    "ovbar;": "\u233d",
+    "par;": "\u2225",
+    "para": "\xb6",
+    "para;": "\xb6",
+    "parallel;": "\u2225",
+    "parsim;": "\u2af3",
+    "parsl;": "\u2afd",
+    "part;": "\u2202",
+    "pcy;": "\u043f",
+    "percnt;": "%",
+    "period;": ".",
+    "permil;": "\u2030",
+    "perp;": "\u22a5",
+    "pertenk;": "\u2031",
+    "pfr;": "\U0001d52d",
+    "phi;": "\u03c6",
+    "phiv;": "\u03d5",
+    "phmmat;": "\u2133",
+    "phone;": "\u260e",
+    "pi;": "\u03c0",
+    "pitchfork;": "\u22d4",
+    "piv;": "\u03d6",
+    "planck;": "\u210f",
+    "planckh;": "\u210e",
+    "plankv;": "\u210f",
+    "plus;": "+",
+    "plusacir;": "\u2a23",
+    "plusb;": "\u229e",
+    "pluscir;": "\u2a22",
+    "plusdo;": "\u2214",
+    "plusdu;": "\u2a25",
+    "pluse;": "\u2a72",
+    "plusmn": "\xb1",
+    "plusmn;": "\xb1",
+    "plussim;": "\u2a26",
+    "plustwo;": "\u2a27",
+    "pm;": "\xb1",
+    "pointint;": "\u2a15",
+    "popf;": "\U0001d561",
+    "pound": "\xa3",
+    "pound;": "\xa3",
+    "pr;": "\u227a",
+    "prE;": "\u2ab3",
+    "prap;": "\u2ab7",
+    "prcue;": "\u227c",
+    "pre;": "\u2aaf",
+    "prec;": "\u227a",
+    "precapprox;": "\u2ab7",
+    "preccurlyeq;": "\u227c",
+    "preceq;": "\u2aaf",
+    "precnapprox;": "\u2ab9",
+    "precneqq;": "\u2ab5",
+    "precnsim;": "\u22e8",
+    "precsim;": "\u227e",
+    "prime;": "\u2032",
+    "primes;": "\u2119",
+    "prnE;": "\u2ab5",
+    "prnap;": "\u2ab9",
+    "prnsim;": "\u22e8",
+    "prod;": "\u220f",
+    "profalar;": "\u232e",
+    "profline;": "\u2312",
+    "profsurf;": "\u2313",
+    "prop;": "\u221d",
+    "propto;": "\u221d",
+    "prsim;": "\u227e",
+    "prurel;": "\u22b0",
+    "pscr;": "\U0001d4c5",
+    "psi;": "\u03c8",
+    "puncsp;": "\u2008",
+    "qfr;": "\U0001d52e",
+    "qint;": "\u2a0c",
+    "qopf;": "\U0001d562",
+    "qprime;": "\u2057",
+    "qscr;": "\U0001d4c6",
+    "quaternions;": "\u210d",
+    "quatint;": "\u2a16",
+    "quest;": "?",
+    "questeq;": "\u225f",
+    "quot": "\"",
+    "quot;": "\"",
+    "rAarr;": "\u21db",
+    "rArr;": "\u21d2",
+    "rAtail;": "\u291c",
+    "rBarr;": "\u290f",
+    "rHar;": "\u2964",
+    "race;": "\u223d\u0331",
+    "racute;": "\u0155",
+    "radic;": "\u221a",
+    "raemptyv;": "\u29b3",
+    "rang;": "\u27e9",
+    "rangd;": "\u2992",
+    "range;": "\u29a5",
+    "rangle;": "\u27e9",
+    "raquo": "\xbb",
+    "raquo;": "\xbb",
+    "rarr;": "\u2192",
+    "rarrap;": "\u2975",
+    "rarrb;": "\u21e5",
+    "rarrbfs;": "\u2920",
+    "rarrc;": "\u2933",
+    "rarrfs;": "\u291e",
+    "rarrhk;": "\u21aa",
+    "rarrlp;": "\u21ac",
+    "rarrpl;": "\u2945",
+    "rarrsim;": "\u2974",
+    "rarrtl;": "\u21a3",
+    "rarrw;": "\u219d",
+    "ratail;": "\u291a",
+    "ratio;": "\u2236",
+    "rationals;": "\u211a",
+    "rbarr;": "\u290d",
+    "rbbrk;": "\u2773",
+    "rbrace;": "}",
+    "rbrack;": "]",
+    "rbrke;": "\u298c",
+    "rbrksld;": "\u298e",
+    "rbrkslu;": "\u2990",
+    "rcaron;": "\u0159",
+    "rcedil;": "\u0157",
+    "rceil;": "\u2309",
+    "rcub;": "}",
+    "rcy;": "\u0440",
+    "rdca;": "\u2937",
+    "rdldhar;": "\u2969",
+    "rdquo;": "\u201d",
+    "rdquor;": "\u201d",
+    "rdsh;": "\u21b3",
+    "real;": "\u211c",
+    "realine;": "\u211b",
+    "realpart;": "\u211c",
+    "reals;": "\u211d",
+    "rect;": "\u25ad",
+    "reg": "\xae",
+    "reg;": "\xae",
+    "rfisht;": "\u297d",
+    "rfloor;": "\u230b",
+    "rfr;": "\U0001d52f",
+    "rhard;": "\u21c1",
+    "rharu;": "\u21c0",
+    "rharul;": "\u296c",
+    "rho;": "\u03c1",
+    "rhov;": "\u03f1",
+    "rightarrow;": "\u2192",
+    "rightarrowtail;": "\u21a3",
+    "rightharpoondown;": "\u21c1",
+    "rightharpoonup;": "\u21c0",
+    "rightleftarrows;": "\u21c4",
+    "rightleftharpoons;": "\u21cc",
+    "rightrightarrows;": "\u21c9",
+    "rightsquigarrow;": "\u219d",
+    "rightthreetimes;": "\u22cc",
+    "ring;": "\u02da",
+    "risingdotseq;": "\u2253",
+    "rlarr;": "\u21c4",
+    "rlhar;": "\u21cc",
+    "rlm;": "\u200f",
+    "rmoust;": "\u23b1",
+    "rmoustache;": "\u23b1",
+    "rnmid;": "\u2aee",
+    "roang;": "\u27ed",
+    "roarr;": "\u21fe",
+    "robrk;": "\u27e7",
+    "ropar;": "\u2986",
+    "ropf;": "\U0001d563",
+    "roplus;": "\u2a2e",
+    "rotimes;": "\u2a35",
+    "rpar;": ")",
+    "rpargt;": "\u2994",
+    "rppolint;": "\u2a12",
+    "rrarr;": "\u21c9",
+    "rsaquo;": "\u203a",
+    "rscr;": "\U0001d4c7",
+    "rsh;": "\u21b1",
+    "rsqb;": "]",
+    "rsquo;": "\u2019",
+    "rsquor;": "\u2019",
+    "rthree;": "\u22cc",
+    "rtimes;": "\u22ca",
+    "rtri;": "\u25b9",
+    "rtrie;": "\u22b5",
+    "rtrif;": "\u25b8",
+    "rtriltri;": "\u29ce",
+    "ruluhar;": "\u2968",
+    "rx;": "\u211e",
+    "sacute;": "\u015b",
+    "sbquo;": "\u201a",
+    "sc;": "\u227b",
+    "scE;": "\u2ab4",
+    "scap;": "\u2ab8",
+    "scaron;": "\u0161",
+    "sccue;": "\u227d",
+    "sce;": "\u2ab0",
+    "scedil;": "\u015f",
+    "scirc;": "\u015d",
+    "scnE;": "\u2ab6",
+    "scnap;": "\u2aba",
+    "scnsim;": "\u22e9",
+    "scpolint;": "\u2a13",
+    "scsim;": "\u227f",
+    "scy;": "\u0441",
+    "sdot;": "\u22c5",
+    "sdotb;": "\u22a1",
+    "sdote;": "\u2a66",
+    "seArr;": "\u21d8",
+    "searhk;": "\u2925",
+    "searr;": "\u2198",
+    "searrow;": "\u2198",
+    "sect": "\xa7",
+    "sect;": "\xa7",
+    "semi;": ";",
+    "seswar;": "\u2929",
+    "setminus;": "\u2216",
+    "setmn;": "\u2216",
+    "sext;": "\u2736",
+    "sfr;": "\U0001d530",
+    "sfrown;": "\u2322",
+    "sharp;": "\u266f",
+    "shchcy;": "\u0449",
+    "shcy;": "\u0448",
+    "shortmid;": "\u2223",
+    "shortparallel;": "\u2225",
+    "shy": "\xad",
+    "shy;": "\xad",
+    "sigma;": "\u03c3",
+    "sigmaf;": "\u03c2",
+    "sigmav;": "\u03c2",
+    "sim;": "\u223c",
+    "simdot;": "\u2a6a",
+    "sime;": "\u2243",
+    "simeq;": "\u2243",
+    "simg;": "\u2a9e",
+    "simgE;": "\u2aa0",
+    "siml;": "\u2a9d",
+    "simlE;": "\u2a9f",
+    "simne;": "\u2246",
+    "simplus;": "\u2a24",
+    "simrarr;": "\u2972",
+    "slarr;": "\u2190",
+    "smallsetminus;": "\u2216",
+    "smashp;": "\u2a33",
+    "smeparsl;": "\u29e4",
+    "smid;": "\u2223",
+    "smile;": "\u2323",
+    "smt;": "\u2aaa",
+    "smte;": "\u2aac",
+    "smtes;": "\u2aac\ufe00",
+    "softcy;": "\u044c",
+    "sol;": "/",
+    "solb;": "\u29c4",
+    "solbar;": "\u233f",
+    "sopf;": "\U0001d564",
+    "spades;": "\u2660",
+    "spadesuit;": "\u2660",
+    "spar;": "\u2225",
+    "sqcap;": "\u2293",
+    "sqcaps;": "\u2293\ufe00",
+    "sqcup;": "\u2294",
+    "sqcups;": "\u2294\ufe00",
+    "sqsub;": "\u228f",
+    "sqsube;": "\u2291",
+    "sqsubset;": "\u228f",
+    "sqsubseteq;": "\u2291",
+    "sqsup;": "\u2290",
+    "sqsupe;": "\u2292",
+    "sqsupset;": "\u2290",
+    "sqsupseteq;": "\u2292",
+    "squ;": "\u25a1",
+    "square;": "\u25a1",
+    "squarf;": "\u25aa",
+    "squf;": "\u25aa",
+    "srarr;": "\u2192",
+    "sscr;": "\U0001d4c8",
+    "ssetmn;": "\u2216",
+    "ssmile;": "\u2323",
+    "sstarf;": "\u22c6",
+    "star;": "\u2606",
+    "starf;": "\u2605",
+    "straightepsilon;": "\u03f5",
+    "straightphi;": "\u03d5",
+    "strns;": "\xaf",
+    "sub;": "\u2282",
+    "subE;": "\u2ac5",
+    "subdot;": "\u2abd",
+    "sube;": "\u2286",
+    "subedot;": "\u2ac3",
+    "submult;": "\u2ac1",
+    "subnE;": "\u2acb",
+    "subne;": "\u228a",
+    "subplus;": "\u2abf",
+    "subrarr;": "\u2979",
+    "subset;": "\u2282",
+    "subseteq;": "\u2286",
+    "subseteqq;": "\u2ac5",
+    "subsetneq;": "\u228a",
+    "subsetneqq;": "\u2acb",
+    "subsim;": "\u2ac7",
+    "subsub;": "\u2ad5",
+    "subsup;": "\u2ad3",
+    "succ;": "\u227b",
+    "succapprox;": "\u2ab8",
+    "succcurlyeq;": "\u227d",
+    "succeq;": "\u2ab0",
+    "succnapprox;": "\u2aba",
+    "succneqq;": "\u2ab6",
+    "succnsim;": "\u22e9",
+    "succsim;": "\u227f",
+    "sum;": "\u2211",
+    "sung;": "\u266a",
+    "sup1": "\xb9",
+    "sup1;": "\xb9",
+    "sup2": "\xb2",
+    "sup2;": "\xb2",
+    "sup3": "\xb3",
+    "sup3;": "\xb3",
+    "sup;": "\u2283",
+    "supE;": "\u2ac6",
+    "supdot;": "\u2abe",
+    "supdsub;": "\u2ad8",
+    "supe;": "\u2287",
+    "supedot;": "\u2ac4",
+    "suphsol;": "\u27c9",
+    "suphsub;": "\u2ad7",
+    "suplarr;": "\u297b",
+    "supmult;": "\u2ac2",
+    "supnE;": "\u2acc",
+    "supne;": "\u228b",
+    "supplus;": "\u2ac0",
+    "supset;": "\u2283",
+    "supseteq;": "\u2287",
+    "supseteqq;": "\u2ac6",
+    "supsetneq;": "\u228b",
+    "supsetneqq;": "\u2acc",
+    "supsim;": "\u2ac8",
+    "supsub;": "\u2ad4",
+    "supsup;": "\u2ad6",
+    "swArr;": "\u21d9",
+    "swarhk;": "\u2926",
+    "swarr;": "\u2199",
+    "swarrow;": "\u2199",
+    "swnwar;": "\u292a",
+    "szlig": "\xdf",
+    "szlig;": "\xdf",
+    "target;": "\u2316",
+    "tau;": "\u03c4",
+    "tbrk;": "\u23b4",
+    "tcaron;": "\u0165",
+    "tcedil;": "\u0163",
+    "tcy;": "\u0442",
+    "tdot;": "\u20db",
+    "telrec;": "\u2315",
+    "tfr;": "\U0001d531",
+    "there4;": "\u2234",
+    "therefore;": "\u2234",
+    "theta;": "\u03b8",
+    "thetasym;": "\u03d1",
+    "thetav;": "\u03d1",
+    "thickapprox;": "\u2248",
+    "thicksim;": "\u223c",
+    "thinsp;": "\u2009",
+    "thkap;": "\u2248",
+    "thksim;": "\u223c",
+    "thorn": "\xfe",
+    "thorn;": "\xfe",
+    "tilde;": "\u02dc",
+    "times": "\xd7",
+    "times;": "\xd7",
+    "timesb;": "\u22a0",
+    "timesbar;": "\u2a31",
+    "timesd;": "\u2a30",
+    "tint;": "\u222d",
+    "toea;": "\u2928",
+    "top;": "\u22a4",
+    "topbot;": "\u2336",
+    "topcir;": "\u2af1",
+    "topf;": "\U0001d565",
+    "topfork;": "\u2ada",
+    "tosa;": "\u2929",
+    "tprime;": "\u2034",
+    "trade;": "\u2122",
+    "triangle;": "\u25b5",
+    "triangledown;": "\u25bf",
+    "triangleleft;": "\u25c3",
+    "trianglelefteq;": "\u22b4",
+    "triangleq;": "\u225c",
+    "triangleright;": "\u25b9",
+    "trianglerighteq;": "\u22b5",
+    "tridot;": "\u25ec",
+    "trie;": "\u225c",
+    "triminus;": "\u2a3a",
+    "triplus;": "\u2a39",
+    "trisb;": "\u29cd",
+    "tritime;": "\u2a3b",
+    "trpezium;": "\u23e2",
+    "tscr;": "\U0001d4c9",
+    "tscy;": "\u0446",
+    "tshcy;": "\u045b",
+    "tstrok;": "\u0167",
+    "twixt;": "\u226c",
+    "twoheadleftarrow;": "\u219e",
+    "twoheadrightarrow;": "\u21a0",
+    "uArr;": "\u21d1",
+    "uHar;": "\u2963",
+    "uacute": "\xfa",
+    "uacute;": "\xfa",
+    "uarr;": "\u2191",
+    "ubrcy;": "\u045e",
+    "ubreve;": "\u016d",
+    "ucirc": "\xfb",
+    "ucirc;": "\xfb",
+    "ucy;": "\u0443",
+    "udarr;": "\u21c5",
+    "udblac;": "\u0171",
+    "udhar;": "\u296e",
+    "ufisht;": "\u297e",
+    "ufr;": "\U0001d532",
+    "ugrave": "\xf9",
+    "ugrave;": "\xf9",
+    "uharl;": "\u21bf",
+    "uharr;": "\u21be",
+    "uhblk;": "\u2580",
+    "ulcorn;": "\u231c",
+    "ulcorner;": "\u231c",
+    "ulcrop;": "\u230f",
+    "ultri;": "\u25f8",
+    "umacr;": "\u016b",
+    "uml": "\xa8",
+    "uml;": "\xa8",
+    "uogon;": "\u0173",
+    "uopf;": "\U0001d566",
+    "uparrow;": "\u2191",
+    "updownarrow;": "\u2195",
+    "upharpoonleft;": "\u21bf",
+    "upharpoonright;": "\u21be",
+    "uplus;": "\u228e",
+    "upsi;": "\u03c5",
+    "upsih;": "\u03d2",
+    "upsilon;": "\u03c5",
+    "upuparrows;": "\u21c8",
+    "urcorn;": "\u231d",
+    "urcorner;": "\u231d",
+    "urcrop;": "\u230e",
+    "uring;": "\u016f",
+    "urtri;": "\u25f9",
+    "uscr;": "\U0001d4ca",
+    "utdot;": "\u22f0",
+    "utilde;": "\u0169",
+    "utri;": "\u25b5",
+    "utrif;": "\u25b4",
+    "uuarr;": "\u21c8",
+    "uuml": "\xfc",
+    "uuml;": "\xfc",
+    "uwangle;": "\u29a7",
+    "vArr;": "\u21d5",
+    "vBar;": "\u2ae8",
+    "vBarv;": "\u2ae9",
+    "vDash;": "\u22a8",
+    "vangrt;": "\u299c",
+    "varepsilon;": "\u03f5",
+    "varkappa;": "\u03f0",
+    "varnothing;": "\u2205",
+    "varphi;": "\u03d5",
+    "varpi;": "\u03d6",
+    "varpropto;": "\u221d",
+    "varr;": "\u2195",
+    "varrho;": "\u03f1",
+    "varsigma;": "\u03c2",
+    "varsubsetneq;": "\u228a\ufe00",
+    "varsubsetneqq;": "\u2acb\ufe00",
+    "varsupsetneq;": "\u228b\ufe00",
+    "varsupsetneqq;": "\u2acc\ufe00",
+    "vartheta;": "\u03d1",
+    "vartriangleleft;": "\u22b2",
+    "vartriangleright;": "\u22b3",
+    "vcy;": "\u0432",
+    "vdash;": "\u22a2",
+    "vee;": "\u2228",
+    "veebar;": "\u22bb",
+    "veeeq;": "\u225a",
+    "vellip;": "\u22ee",
+    "verbar;": "|",
+    "vert;": "|",
+    "vfr;": "\U0001d533",
+    "vltri;": "\u22b2",
+    "vnsub;": "\u2282\u20d2",
+    "vnsup;": "\u2283\u20d2",
+    "vopf;": "\U0001d567",
+    "vprop;": "\u221d",
+    "vrtri;": "\u22b3",
+    "vscr;": "\U0001d4cb",
+    "vsubnE;": "\u2acb\ufe00",
+    "vsubne;": "\u228a\ufe00",
+    "vsupnE;": "\u2acc\ufe00",
+    "vsupne;": "\u228b\ufe00",
+    "vzigzag;": "\u299a",
+    "wcirc;": "\u0175",
+    "wedbar;": "\u2a5f",
+    "wedge;": "\u2227",
+    "wedgeq;": "\u2259",
+    "weierp;": "\u2118",
+    "wfr;": "\U0001d534",
+    "wopf;": "\U0001d568",
+    "wp;": "\u2118",
+    "wr;": "\u2240",
+    "wreath;": "\u2240",
+    "wscr;": "\U0001d4cc",
+    "xcap;": "\u22c2",
+    "xcirc;": "\u25ef",
+    "xcup;": "\u22c3",
+    "xdtri;": "\u25bd",
+    "xfr;": "\U0001d535",
+    "xhArr;": "\u27fa",
+    "xharr;": "\u27f7",
+    "xi;": "\u03be",
+    "xlArr;": "\u27f8",
+    "xlarr;": "\u27f5",
+    "xmap;": "\u27fc",
+    "xnis;": "\u22fb",
+    "xodot;": "\u2a00",
+    "xopf;": "\U0001d569",
+    "xoplus;": "\u2a01",
+    "xotime;": "\u2a02",
+    "xrArr;": "\u27f9",
+    "xrarr;": "\u27f6",
+    "xscr;": "\U0001d4cd",
+    "xsqcup;": "\u2a06",
+    "xuplus;": "\u2a04",
+    "xutri;": "\u25b3",
+    "xvee;": "\u22c1",
+    "xwedge;": "\u22c0",
+    "yacute": "\xfd",
+    "yacute;": "\xfd",
+    "yacy;": "\u044f",
+    "ycirc;": "\u0177",
+    "ycy;": "\u044b",
+    "yen": "\xa5",
+    "yen;": "\xa5",
+    "yfr;": "\U0001d536",
+    "yicy;": "\u0457",
+    "yopf;": "\U0001d56a",
+    "yscr;": "\U0001d4ce",
+    "yucy;": "\u044e",
+    "yuml": "\xff",
+    "yuml;": "\xff",
+    "zacute;": "\u017a",
+    "zcaron;": "\u017e",
+    "zcy;": "\u0437",
+    "zdot;": "\u017c",
+    "zeetrf;": "\u2128",
+    "zeta;": "\u03b6",
+    "zfr;": "\U0001d537",
+    "zhcy;": "\u0436",
+    "zigrarr;": "\u21dd",
+    "zopf;": "\U0001d56b",
+    "zscr;": "\U0001d4cf",
+    "zwj;": "\u200d",
+    "zwnj;": "\u200c",
+}
+
+replacementCharacters = {
+    0x0: "\uFFFD",
+    0x0d: "\u000D",
+    0x80: "\u20AC",
+    0x81: "\u0081",
+    0x82: "\u201A",
+    0x83: "\u0192",
+    0x84: "\u201E",
+    0x85: "\u2026",
+    0x86: "\u2020",
+    0x87: "\u2021",
+    0x88: "\u02C6",
+    0x89: "\u2030",
+    0x8A: "\u0160",
+    0x8B: "\u2039",
+    0x8C: "\u0152",
+    0x8D: "\u008D",
+    0x8E: "\u017D",
+    0x8F: "\u008F",
+    0x90: "\u0090",
+    0x91: "\u2018",
+    0x92: "\u2019",
+    0x93: "\u201C",
+    0x94: "\u201D",
+    0x95: "\u2022",
+    0x96: "\u2013",
+    0x97: "\u2014",
+    0x98: "\u02DC",
+    0x99: "\u2122",
+    0x9A: "\u0161",
+    0x9B: "\u203A",
+    0x9C: "\u0153",
+    0x9D: "\u009D",
+    0x9E: "\u017E",
+    0x9F: "\u0178",
+}
+
+tokenTypes = {
+    "Doctype": 0,
+    "Characters": 1,
+    "SpaceCharacters": 2,
+    "StartTag": 3,
+    "EndTag": 4,
+    "EmptyTag": 5,
+    "Comment": 6,
+    "ParseError": 7
+}
+
+tagTokenTypes = frozenset([tokenTypes["StartTag"], tokenTypes["EndTag"],
+                           tokenTypes["EmptyTag"]])
+
+
+prefixes = {v: k for k, v in namespaces.items()}
+prefixes["http://www.w3.org/1998/Math/MathML"] = "math"
+
+
+class DataLossWarning(UserWarning):
+    """Raised when the current tree is unable to represent the input data"""
+    pass
+
+
+class _ReparseException(Exception):
+    pass
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/alphabeticalattributes.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/alphabeticalattributes.py
new file mode 100644
index 0000000..5ba926e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/alphabeticalattributes.py
@@ -0,0 +1,29 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from . import base
+
+from collections import OrderedDict
+
+
+def _attr_key(attr):
+    """Return an appropriate key for an attribute for sorting
+
+    Attributes have a namespace that can be either ``None`` or a string. We
+    can't compare the two because they're different types, so we convert
+    ``None`` to an empty string first.
+
+    """
+    return (attr[0][0] or ''), attr[0][1]
+
+
+class Filter(base.Filter):
+    """Alphabetizes attributes for elements"""
+    def __iter__(self):
+        for token in base.Filter.__iter__(self):
+            if token["type"] in ("StartTag", "EmptyTag"):
+                attrs = OrderedDict()
+                for name, value in sorted(token["data"].items(),
+                                          key=_attr_key):
+                    attrs[name] = value
+                token["data"] = attrs
+            yield token
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/base.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/base.py
new file mode 100644
index 0000000..c7dbaed
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/base.py
@@ -0,0 +1,12 @@
+from __future__ import absolute_import, division, unicode_literals
+
+
+class Filter(object):
+    def __init__(self, source):
+        self.source = source
+
+    def __iter__(self):
+        return iter(self.source)
+
+    def __getattr__(self, name):
+        return getattr(self.source, name)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/inject_meta_charset.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/inject_meta_charset.py
new file mode 100644
index 0000000..aefb5c8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/inject_meta_charset.py
@@ -0,0 +1,73 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from . import base
+
+
+class Filter(base.Filter):
+    """Injects ``<meta charset=ENCODING>`` tag into head of document"""
+    def __init__(self, source, encoding):
+        """Creates a Filter
+
+        :arg source: the source token stream
+
+        :arg encoding: the encoding to set
+
+        """
+        base.Filter.__init__(self, source)
+        self.encoding = encoding
+
+    def __iter__(self):
+        state = "pre_head"
+        meta_found = (self.encoding is None)
+        pending = []
+
+        for token in base.Filter.__iter__(self):
+            type = token["type"]
+            if type == "StartTag":
+                if token["name"].lower() == "head":
+                    state = "in_head"
+
+            elif type == "EmptyTag":
+                if token["name"].lower() == "meta":
+                    # replace charset with actual encoding
+                    has_http_equiv_content_type = False
+                    for (namespace, name), value in token["data"].items():
+                        if namespace is not None:
+                            continue
+                        elif name.lower() == 'charset':
+                            token["data"][(namespace, name)] = self.encoding
+                            meta_found = True
+                            break
+                        elif name == 'http-equiv' and value.lower() == 'content-type':
+                            has_http_equiv_content_type = True
+                    else:
+                        if has_http_equiv_content_type and (None, "content") in token["data"]:
+                            token["data"][(None, "content")] = 'text/html; charset=%s' % self.encoding
+                            meta_found = True
+
+                elif token["name"].lower() == "head" and not meta_found:
+                    # insert meta into empty head
+                    yield {"type": "StartTag", "name": "head",
+                           "data": token["data"]}
+                    yield {"type": "EmptyTag", "name": "meta",
+                           "data": {(None, "charset"): self.encoding}}
+                    yield {"type": "EndTag", "name": "head"}
+                    meta_found = True
+                    continue
+
+            elif type == "EndTag":
+                if token["name"].lower() == "head" and pending:
+                    # insert meta into head (if necessary) and flush pending queue
+                    yield pending.pop(0)
+                    if not meta_found:
+                        yield {"type": "EmptyTag", "name": "meta",
+                               "data": {(None, "charset"): self.encoding}}
+                    while pending:
+                        yield pending.pop(0)
+                    meta_found = True
+                    state = "post_head"
+
+            if state == "in_head":
+                pending.append(token)
+            else:
+                yield token
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/lint.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/lint.py
new file mode 100644
index 0000000..fcc07ee
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/lint.py
@@ -0,0 +1,93 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from pip._vendor.six import text_type
+
+from . import base
+from ..constants import namespaces, voidElements
+
+from ..constants import spaceCharacters
+spaceCharacters = "".join(spaceCharacters)
+
+
+class Filter(base.Filter):
+    """Lints the token stream for errors
+
+    If it finds any errors, it'll raise an ``AssertionError``.
+
+    """
+    def __init__(self, source, require_matching_tags=True):
+        """Creates a Filter
+
+        :arg source: the source token stream
+
+        :arg require_matching_tags: whether or not to require matching tags
+
+        """
+        super(Filter, self).__init__(source)
+        self.require_matching_tags = require_matching_tags
+
+    def __iter__(self):
+        open_elements = []
+        for token in base.Filter.__iter__(self):
+            type = token["type"]
+            if type in ("StartTag", "EmptyTag"):
+                namespace = token["namespace"]
+                name = token["name"]
+                assert namespace is None or isinstance(namespace, text_type)
+                assert namespace != ""
+                assert isinstance(name, text_type)
+                assert name != ""
+                assert isinstance(token["data"], dict)
+                if (not namespace or namespace == namespaces["html"]) and name in voidElements:
+                    assert type == "EmptyTag"
+                else:
+                    assert type == "StartTag"
+                if type == "StartTag" and self.require_matching_tags:
+                    open_elements.append((namespace, name))
+                for (namespace, name), value in token["data"].items():
+                    assert namespace is None or isinstance(namespace, text_type)
+                    assert namespace != ""
+                    assert isinstance(name, text_type)
+                    assert name != ""
+                    assert isinstance(value, text_type)
+
+            elif type == "EndTag":
+                namespace = token["namespace"]
+                name = token["name"]
+                assert namespace is None or isinstance(namespace, text_type)
+                assert namespace != ""
+                assert isinstance(name, text_type)
+                assert name != ""
+                if (not namespace or namespace == namespaces["html"]) and name in voidElements:
+                    assert False, "Void element reported as EndTag token: %(tag)s" % {"tag": name}
+                elif self.require_matching_tags:
+                    start = open_elements.pop()
+                    assert start == (namespace, name)
+
+            elif type == "Comment":
+                data = token["data"]
+                assert isinstance(data, text_type)
+
+            elif type in ("Characters", "SpaceCharacters"):
+                data = token["data"]
+                assert isinstance(data, text_type)
+                assert data != ""
+                if type == "SpaceCharacters":
+                    assert data.strip(spaceCharacters) == ""
+
+            elif type == "Doctype":
+                name = token["name"]
+                assert name is None or isinstance(name, text_type)
+                assert token["publicId"] is None or isinstance(name, text_type)
+                assert token["systemId"] is None or isinstance(name, text_type)
+
+            elif type == "Entity":
+                assert isinstance(token["name"], text_type)
+
+            elif type == "SerializerError":
+                assert isinstance(token["data"], text_type)
+
+            else:
+                assert False, "Unknown token type: %(type)s" % {"type": type}
+
+            yield token
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/optionaltags.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/optionaltags.py
new file mode 100644
index 0000000..4a86501
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/optionaltags.py
@@ -0,0 +1,207 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from . import base
+
+
+class Filter(base.Filter):
+    """Removes optional tags from the token stream"""
+    def slider(self):
+        previous1 = previous2 = None
+        for token in self.source:
+            if previous1 is not None:
+                yield previous2, previous1, token
+            previous2 = previous1
+            previous1 = token
+        if previous1 is not None:
+            yield previous2, previous1, None
+
+    def __iter__(self):
+        for previous, token, next in self.slider():
+            type = token["type"]
+            if type == "StartTag":
+                if (token["data"] or
+                        not self.is_optional_start(token["name"], previous, next)):
+                    yield token
+            elif type == "EndTag":
+                if not self.is_optional_end(token["name"], next):
+                    yield token
+            else:
+                yield token
+
+    def is_optional_start(self, tagname, previous, next):
+        type = next and next["type"] or None
+        if tagname in 'html':
+            # An html element's start tag may be omitted if the first thing
+            # inside the html element is not a space character or a comment.
+            return type not in ("Comment", "SpaceCharacters")
+        elif tagname == 'head':
+            # A head element's start tag may be omitted if the first thing
+            # inside the head element is an element.
+            # XXX: we also omit the start tag if the head element is empty
+            if type in ("StartTag", "EmptyTag"):
+                return True
+            elif type == "EndTag":
+                return next["name"] == "head"
+        elif tagname == 'body':
+            # A body element's start tag may be omitted if the first thing
+            # inside the body element is not a space character or a comment,
+            # except if the first thing inside the body element is a script
+            # or style element and the node immediately preceding the body
+            # element is a head element whose end tag has been omitted.
+            if type in ("Comment", "SpaceCharacters"):
+                return False
+            elif type == "StartTag":
+                # XXX: we do not look at the preceding event, so we never omit
+                # the body element's start tag if it's followed by a script or
+                # a style element.
+                return next["name"] not in ('script', 'style')
+            else:
+                return True
+        elif tagname == 'colgroup':
+            # A colgroup element's start tag may be omitted if the first thing
+            # inside the colgroup element is a col element, and if the element
+            # is not immediately preceded by another colgroup element whose
+            # end tag has been omitted.
+            if type in ("StartTag", "EmptyTag"):
+                # XXX: we do not look at the preceding event, so instead we never
+                # omit the colgroup element's end tag when it is immediately
+                # followed by another colgroup element. See is_optional_end.
+                return next["name"] == "col"
+            else:
+                return False
+        elif tagname == 'tbody':
+            # A tbody element's start tag may be omitted if the first thing
+            # inside the tbody element is a tr element, and if the element is
+            # not immediately preceded by a tbody, thead, or tfoot element
+            # whose end tag has been omitted.
+            if type == "StartTag":
+                # omit the thead and tfoot elements' end tag when they are
+                # immediately followed by a tbody element. See is_optional_end.
+                if previous and previous['type'] == 'EndTag' and \
+                        previous['name'] in ('tbody', 'thead', 'tfoot'):
+                    return False
+                return next["name"] == 'tr'
+            else:
+                return False
+        return False
+
+    def is_optional_end(self, tagname, next):
+        type = next and next["type"] or None
+        if tagname in ('html', 'head', 'body'):
+            # An html element's end tag may be omitted if the html element
+            # is not immediately followed by a space character or a comment.
+            return type not in ("Comment", "SpaceCharacters")
+        elif tagname in ('li', 'optgroup', 'tr'):
+            # A li element's end tag may be omitted if the li element is
+            # immediately followed by another li element or if there is
+            # no more content in the parent element.
+            # An optgroup element's end tag may be omitted if the optgroup
+            # element is immediately followed by another optgroup element,
+            # or if there is no more content in the parent element.
+            # A tr element's end tag may be omitted if the tr element is
+            # immediately followed by another tr element, or if there is
+            # no more content in the parent element.
+            if type == "StartTag":
+                return next["name"] == tagname
+            else:
+                return type == "EndTag" or type is None
+        elif tagname in ('dt', 'dd'):
+            # A dt element's end tag may be omitted if the dt element is
+            # immediately followed by another dt element or a dd element.
+            # A dd element's end tag may be omitted if the dd element is
+            # immediately followed by another dd element or a dt element,
+            # or if there is no more content in the parent element.
+            if type == "StartTag":
+                return next["name"] in ('dt', 'dd')
+            elif tagname == 'dd':
+                return type == "EndTag" or type is None
+            else:
+                return False
+        elif tagname == 'p':
+            # A p element's end tag may be omitted if the p element is
+            # immediately followed by an address, article, aside,
+            # blockquote, datagrid, dialog, dir, div, dl, fieldset,
+            # footer, form, h1, h2, h3, h4, h5, h6, header, hr, menu,
+            # nav, ol, p, pre, section, table, or ul, element, or if
+            # there is no more content in the parent element.
+            if type in ("StartTag", "EmptyTag"):
+                return next["name"] in ('address', 'article', 'aside',
+                                        'blockquote', 'datagrid', 'dialog',
+                                        'dir', 'div', 'dl', 'fieldset', 'footer',
+                                        'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
+                                        'header', 'hr', 'menu', 'nav', 'ol',
+                                        'p', 'pre', 'section', 'table', 'ul')
+            else:
+                return type == "EndTag" or type is None
+        elif tagname == 'option':
+            # An option element's end tag may be omitted if the option
+            # element is immediately followed by another option element,
+            # or if it is immediately followed by an <code>optgroup</code>
+            # element, or if there is no more content in the parent
+            # element.
+            if type == "StartTag":
+                return next["name"] in ('option', 'optgroup')
+            else:
+                return type == "EndTag" or type is None
+        elif tagname in ('rt', 'rp'):
+            # An rt element's end tag may be omitted if the rt element is
+            # immediately followed by an rt or rp element, or if there is
+            # no more content in the parent element.
+            # An rp element's end tag may be omitted if the rp element is
+            # immediately followed by an rt or rp element, or if there is
+            # no more content in the parent element.
+            if type == "StartTag":
+                return next["name"] in ('rt', 'rp')
+            else:
+                return type == "EndTag" or type is None
+        elif tagname == 'colgroup':
+            # A colgroup element's end tag may be omitted if the colgroup
+            # element is not immediately followed by a space character or
+            # a comment.
+            if type in ("Comment", "SpaceCharacters"):
+                return False
+            elif type == "StartTag":
+                # XXX: we also look for an immediately following colgroup
+                # element. See is_optional_start.
+                return next["name"] != 'colgroup'
+            else:
+                return True
+        elif tagname in ('thead', 'tbody'):
+            # A thead element's end tag may be omitted if the thead element
+            # is immediately followed by a tbody or tfoot element.
+            # A tbody element's end tag may be omitted if the tbody element
+            # is immediately followed by a tbody or tfoot element, or if
+            # there is no more content in the parent element.
+            # A tfoot element's end tag may be omitted if the tfoot element
+            # is immediately followed by a tbody element, or if there is no
+            # more content in the parent element.
+            # XXX: we never omit the end tag when the following element is
+            # a tbody. See is_optional_start.
+            if type == "StartTag":
+                return next["name"] in ['tbody', 'tfoot']
+            elif tagname == 'tbody':
+                return type == "EndTag" or type is None
+            else:
+                return False
+        elif tagname == 'tfoot':
+            # A tfoot element's end tag may be omitted if the tfoot element
+            # is immediately followed by a tbody element, or if there is no
+            # more content in the parent element.
+            # XXX: we never omit the end tag when the following element is
+            # a tbody. See is_optional_start.
+            if type == "StartTag":
+                return next["name"] == 'tbody'
+            else:
+                return type == "EndTag" or type is None
+        elif tagname in ('td', 'th'):
+            # A td element's end tag may be omitted if the td element is
+            # immediately followed by a td or th element, or if there is
+            # no more content in the parent element.
+            # A th element's end tag may be omitted if the th element is
+            # immediately followed by a td or th element, or if there is
+            # no more content in the parent element.
+            if type == "StartTag":
+                return next["name"] in ('td', 'th')
+            else:
+                return type == "EndTag" or type is None
+        return False
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/sanitizer.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/sanitizer.py
new file mode 100644
index 0000000..aa7431d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/sanitizer.py
@@ -0,0 +1,916 @@
+"""Deprecated from html5lib 1.1.
+
+See `here <https://github.com/html5lib/html5lib-python/issues/443>`_ for
+information about its deprecation; `Bleach <https://github.com/mozilla/bleach>`_
+is recommended as a replacement. Please let us know in the aforementioned issue
+if Bleach is unsuitable for your needs.
+
+"""
+from __future__ import absolute_import, division, unicode_literals
+
+import re
+import warnings
+from xml.sax.saxutils import escape, unescape
+
+from pip._vendor.six.moves import urllib_parse as urlparse
+
+from . import base
+from ..constants import namespaces, prefixes
+
+__all__ = ["Filter"]
+
+
+_deprecation_msg = (
+    "html5lib's sanitizer is deprecated; see " +
+    "https://github.com/html5lib/html5lib-python/issues/443 and please let " +
+    "us know if Bleach is unsuitable for your needs"
+)
+
+warnings.warn(_deprecation_msg, DeprecationWarning)
+
+allowed_elements = frozenset((
+    (namespaces['html'], 'a'),
+    (namespaces['html'], 'abbr'),
+    (namespaces['html'], 'acronym'),
+    (namespaces['html'], 'address'),
+    (namespaces['html'], 'area'),
+    (namespaces['html'], 'article'),
+    (namespaces['html'], 'aside'),
+    (namespaces['html'], 'audio'),
+    (namespaces['html'], 'b'),
+    (namespaces['html'], 'big'),
+    (namespaces['html'], 'blockquote'),
+    (namespaces['html'], 'br'),
+    (namespaces['html'], 'button'),
+    (namespaces['html'], 'canvas'),
+    (namespaces['html'], 'caption'),
+    (namespaces['html'], 'center'),
+    (namespaces['html'], 'cite'),
+    (namespaces['html'], 'code'),
+    (namespaces['html'], 'col'),
+    (namespaces['html'], 'colgroup'),
+    (namespaces['html'], 'command'),
+    (namespaces['html'], 'datagrid'),
+    (namespaces['html'], 'datalist'),
+    (namespaces['html'], 'dd'),
+    (namespaces['html'], 'del'),
+    (namespaces['html'], 'details'),
+    (namespaces['html'], 'dfn'),
+    (namespaces['html'], 'dialog'),
+    (namespaces['html'], 'dir'),
+    (namespaces['html'], 'div'),
+    (namespaces['html'], 'dl'),
+    (namespaces['html'], 'dt'),
+    (namespaces['html'], 'em'),
+    (namespaces['html'], 'event-source'),
+    (namespaces['html'], 'fieldset'),
+    (namespaces['html'], 'figcaption'),
+    (namespaces['html'], 'figure'),
+    (namespaces['html'], 'footer'),
+    (namespaces['html'], 'font'),
+    (namespaces['html'], 'form'),
+    (namespaces['html'], 'header'),
+    (namespaces['html'], 'h1'),
+    (namespaces['html'], 'h2'),
+    (namespaces['html'], 'h3'),
+    (namespaces['html'], 'h4'),
+    (namespaces['html'], 'h5'),
+    (namespaces['html'], 'h6'),
+    (namespaces['html'], 'hr'),
+    (namespaces['html'], 'i'),
+    (namespaces['html'], 'img'),
+    (namespaces['html'], 'input'),
+    (namespaces['html'], 'ins'),
+    (namespaces['html'], 'keygen'),
+    (namespaces['html'], 'kbd'),
+    (namespaces['html'], 'label'),
+    (namespaces['html'], 'legend'),
+    (namespaces['html'], 'li'),
+    (namespaces['html'], 'm'),
+    (namespaces['html'], 'map'),
+    (namespaces['html'], 'menu'),
+    (namespaces['html'], 'meter'),
+    (namespaces['html'], 'multicol'),
+    (namespaces['html'], 'nav'),
+    (namespaces['html'], 'nextid'),
+    (namespaces['html'], 'ol'),
+    (namespaces['html'], 'output'),
+    (namespaces['html'], 'optgroup'),
+    (namespaces['html'], 'option'),
+    (namespaces['html'], 'p'),
+    (namespaces['html'], 'pre'),
+    (namespaces['html'], 'progress'),
+    (namespaces['html'], 'q'),
+    (namespaces['html'], 's'),
+    (namespaces['html'], 'samp'),
+    (namespaces['html'], 'section'),
+    (namespaces['html'], 'select'),
+    (namespaces['html'], 'small'),
+    (namespaces['html'], 'sound'),
+    (namespaces['html'], 'source'),
+    (namespaces['html'], 'spacer'),
+    (namespaces['html'], 'span'),
+    (namespaces['html'], 'strike'),
+    (namespaces['html'], 'strong'),
+    (namespaces['html'], 'sub'),
+    (namespaces['html'], 'sup'),
+    (namespaces['html'], 'table'),
+    (namespaces['html'], 'tbody'),
+    (namespaces['html'], 'td'),
+    (namespaces['html'], 'textarea'),
+    (namespaces['html'], 'time'),
+    (namespaces['html'], 'tfoot'),
+    (namespaces['html'], 'th'),
+    (namespaces['html'], 'thead'),
+    (namespaces['html'], 'tr'),
+    (namespaces['html'], 'tt'),
+    (namespaces['html'], 'u'),
+    (namespaces['html'], 'ul'),
+    (namespaces['html'], 'var'),
+    (namespaces['html'], 'video'),
+    (namespaces['mathml'], 'maction'),
+    (namespaces['mathml'], 'math'),
+    (namespaces['mathml'], 'merror'),
+    (namespaces['mathml'], 'mfrac'),
+    (namespaces['mathml'], 'mi'),
+    (namespaces['mathml'], 'mmultiscripts'),
+    (namespaces['mathml'], 'mn'),
+    (namespaces['mathml'], 'mo'),
+    (namespaces['mathml'], 'mover'),
+    (namespaces['mathml'], 'mpadded'),
+    (namespaces['mathml'], 'mphantom'),
+    (namespaces['mathml'], 'mprescripts'),
+    (namespaces['mathml'], 'mroot'),
+    (namespaces['mathml'], 'mrow'),
+    (namespaces['mathml'], 'mspace'),
+    (namespaces['mathml'], 'msqrt'),
+    (namespaces['mathml'], 'mstyle'),
+    (namespaces['mathml'], 'msub'),
+    (namespaces['mathml'], 'msubsup'),
+    (namespaces['mathml'], 'msup'),
+    (namespaces['mathml'], 'mtable'),
+    (namespaces['mathml'], 'mtd'),
+    (namespaces['mathml'], 'mtext'),
+    (namespaces['mathml'], 'mtr'),
+    (namespaces['mathml'], 'munder'),
+    (namespaces['mathml'], 'munderover'),
+    (namespaces['mathml'], 'none'),
+    (namespaces['svg'], 'a'),
+    (namespaces['svg'], 'animate'),
+    (namespaces['svg'], 'animateColor'),
+    (namespaces['svg'], 'animateMotion'),
+    (namespaces['svg'], 'animateTransform'),
+    (namespaces['svg'], 'clipPath'),
+    (namespaces['svg'], 'circle'),
+    (namespaces['svg'], 'defs'),
+    (namespaces['svg'], 'desc'),
+    (namespaces['svg'], 'ellipse'),
+    (namespaces['svg'], 'font-face'),
+    (namespaces['svg'], 'font-face-name'),
+    (namespaces['svg'], 'font-face-src'),
+    (namespaces['svg'], 'g'),
+    (namespaces['svg'], 'glyph'),
+    (namespaces['svg'], 'hkern'),
+    (namespaces['svg'], 'linearGradient'),
+    (namespaces['svg'], 'line'),
+    (namespaces['svg'], 'marker'),
+    (namespaces['svg'], 'metadata'),
+    (namespaces['svg'], 'missing-glyph'),
+    (namespaces['svg'], 'mpath'),
+    (namespaces['svg'], 'path'),
+    (namespaces['svg'], 'polygon'),
+    (namespaces['svg'], 'polyline'),
+    (namespaces['svg'], 'radialGradient'),
+    (namespaces['svg'], 'rect'),
+    (namespaces['svg'], 'set'),
+    (namespaces['svg'], 'stop'),
+    (namespaces['svg'], 'svg'),
+    (namespaces['svg'], 'switch'),
+    (namespaces['svg'], 'text'),
+    (namespaces['svg'], 'title'),
+    (namespaces['svg'], 'tspan'),
+    (namespaces['svg'], 'use'),
+))
+
+allowed_attributes = frozenset((
+    # HTML attributes
+    (None, 'abbr'),
+    (None, 'accept'),
+    (None, 'accept-charset'),
+    (None, 'accesskey'),
+    (None, 'action'),
+    (None, 'align'),
+    (None, 'alt'),
+    (None, 'autocomplete'),
+    (None, 'autofocus'),
+    (None, 'axis'),
+    (None, 'background'),
+    (None, 'balance'),
+    (None, 'bgcolor'),
+    (None, 'bgproperties'),
+    (None, 'border'),
+    (None, 'bordercolor'),
+    (None, 'bordercolordark'),
+    (None, 'bordercolorlight'),
+    (None, 'bottompadding'),
+    (None, 'cellpadding'),
+    (None, 'cellspacing'),
+    (None, 'ch'),
+    (None, 'challenge'),
+    (None, 'char'),
+    (None, 'charoff'),
+    (None, 'choff'),
+    (None, 'charset'),
+    (None, 'checked'),
+    (None, 'cite'),
+    (None, 'class'),
+    (None, 'clear'),
+    (None, 'color'),
+    (None, 'cols'),
+    (None, 'colspan'),
+    (None, 'compact'),
+    (None, 'contenteditable'),
+    (None, 'controls'),
+    (None, 'coords'),
+    (None, 'data'),
+    (None, 'datafld'),
+    (None, 'datapagesize'),
+    (None, 'datasrc'),
+    (None, 'datetime'),
+    (None, 'default'),
+    (None, 'delay'),
+    (None, 'dir'),
+    (None, 'disabled'),
+    (None, 'draggable'),
+    (None, 'dynsrc'),
+    (None, 'enctype'),
+    (None, 'end'),
+    (None, 'face'),
+    (None, 'for'),
+    (None, 'form'),
+    (None, 'frame'),
+    (None, 'galleryimg'),
+    (None, 'gutter'),
+    (None, 'headers'),
+    (None, 'height'),
+    (None, 'hidefocus'),
+    (None, 'hidden'),
+    (None, 'high'),
+    (None, 'href'),
+    (None, 'hreflang'),
+    (None, 'hspace'),
+    (None, 'icon'),
+    (None, 'id'),
+    (None, 'inputmode'),
+    (None, 'ismap'),
+    (None, 'keytype'),
+    (None, 'label'),
+    (None, 'leftspacing'),
+    (None, 'lang'),
+    (None, 'list'),
+    (None, 'longdesc'),
+    (None, 'loop'),
+    (None, 'loopcount'),
+    (None, 'loopend'),
+    (None, 'loopstart'),
+    (None, 'low'),
+    (None, 'lowsrc'),
+    (None, 'max'),
+    (None, 'maxlength'),
+    (None, 'media'),
+    (None, 'method'),
+    (None, 'min'),
+    (None, 'multiple'),
+    (None, 'name'),
+    (None, 'nohref'),
+    (None, 'noshade'),
+    (None, 'nowrap'),
+    (None, 'open'),
+    (None, 'optimum'),
+    (None, 'pattern'),
+    (None, 'ping'),
+    (None, 'point-size'),
+    (None, 'poster'),
+    (None, 'pqg'),
+    (None, 'preload'),
+    (None, 'prompt'),
+    (None, 'radiogroup'),
+    (None, 'readonly'),
+    (None, 'rel'),
+    (None, 'repeat-max'),
+    (None, 'repeat-min'),
+    (None, 'replace'),
+    (None, 'required'),
+    (None, 'rev'),
+    (None, 'rightspacing'),
+    (None, 'rows'),
+    (None, 'rowspan'),
+    (None, 'rules'),
+    (None, 'scope'),
+    (None, 'selected'),
+    (None, 'shape'),
+    (None, 'size'),
+    (None, 'span'),
+    (None, 'src'),
+    (None, 'start'),
+    (None, 'step'),
+    (None, 'style'),
+    (None, 'summary'),
+    (None, 'suppress'),
+    (None, 'tabindex'),
+    (None, 'target'),
+    (None, 'template'),
+    (None, 'title'),
+    (None, 'toppadding'),
+    (None, 'type'),
+    (None, 'unselectable'),
+    (None, 'usemap'),
+    (None, 'urn'),
+    (None, 'valign'),
+    (None, 'value'),
+    (None, 'variable'),
+    (None, 'volume'),
+    (None, 'vspace'),
+    (None, 'vrml'),
+    (None, 'width'),
+    (None, 'wrap'),
+    (namespaces['xml'], 'lang'),
+    # MathML attributes
+    (None, 'actiontype'),
+    (None, 'align'),
+    (None, 'columnalign'),
+    (None, 'columnalign'),
+    (None, 'columnalign'),
+    (None, 'columnlines'),
+    (None, 'columnspacing'),
+    (None, 'columnspan'),
+    (None, 'depth'),
+    (None, 'display'),
+    (None, 'displaystyle'),
+    (None, 'equalcolumns'),
+    (None, 'equalrows'),
+    (None, 'fence'),
+    (None, 'fontstyle'),
+    (None, 'fontweight'),
+    (None, 'frame'),
+    (None, 'height'),
+    (None, 'linethickness'),
+    (None, 'lspace'),
+    (None, 'mathbackground'),
+    (None, 'mathcolor'),
+    (None, 'mathvariant'),
+    (None, 'mathvariant'),
+    (None, 'maxsize'),
+    (None, 'minsize'),
+    (None, 'other'),
+    (None, 'rowalign'),
+    (None, 'rowalign'),
+    (None, 'rowalign'),
+    (None, 'rowlines'),
+    (None, 'rowspacing'),
+    (None, 'rowspan'),
+    (None, 'rspace'),
+    (None, 'scriptlevel'),
+    (None, 'selection'),
+    (None, 'separator'),
+    (None, 'stretchy'),
+    (None, 'width'),
+    (None, 'width'),
+    (namespaces['xlink'], 'href'),
+    (namespaces['xlink'], 'show'),
+    (namespaces['xlink'], 'type'),
+    # SVG attributes
+    (None, 'accent-height'),
+    (None, 'accumulate'),
+    (None, 'additive'),
+    (None, 'alphabetic'),
+    (None, 'arabic-form'),
+    (None, 'ascent'),
+    (None, 'attributeName'),
+    (None, 'attributeType'),
+    (None, 'baseProfile'),
+    (None, 'bbox'),
+    (None, 'begin'),
+    (None, 'by'),
+    (None, 'calcMode'),
+    (None, 'cap-height'),
+    (None, 'class'),
+    (None, 'clip-path'),
+    (None, 'color'),
+    (None, 'color-rendering'),
+    (None, 'content'),
+    (None, 'cx'),
+    (None, 'cy'),
+    (None, 'd'),
+    (None, 'dx'),
+    (None, 'dy'),
+    (None, 'descent'),
+    (None, 'display'),
+    (None, 'dur'),
+    (None, 'end'),
+    (None, 'fill'),
+    (None, 'fill-opacity'),
+    (None, 'fill-rule'),
+    (None, 'font-family'),
+    (None, 'font-size'),
+    (None, 'font-stretch'),
+    (None, 'font-style'),
+    (None, 'font-variant'),
+    (None, 'font-weight'),
+    (None, 'from'),
+    (None, 'fx'),
+    (None, 'fy'),
+    (None, 'g1'),
+    (None, 'g2'),
+    (None, 'glyph-name'),
+    (None, 'gradientUnits'),
+    (None, 'hanging'),
+    (None, 'height'),
+    (None, 'horiz-adv-x'),
+    (None, 'horiz-origin-x'),
+    (None, 'id'),
+    (None, 'ideographic'),
+    (None, 'k'),
+    (None, 'keyPoints'),
+    (None, 'keySplines'),
+    (None, 'keyTimes'),
+    (None, 'lang'),
+    (None, 'marker-end'),
+    (None, 'marker-mid'),
+    (None, 'marker-start'),
+    (None, 'markerHeight'),
+    (None, 'markerUnits'),
+    (None, 'markerWidth'),
+    (None, 'mathematical'),
+    (None, 'max'),
+    (None, 'min'),
+    (None, 'name'),
+    (None, 'offset'),
+    (None, 'opacity'),
+    (None, 'orient'),
+    (None, 'origin'),
+    (None, 'overline-position'),
+    (None, 'overline-thickness'),
+    (None, 'panose-1'),
+    (None, 'path'),
+    (None, 'pathLength'),
+    (None, 'points'),
+    (None, 'preserveAspectRatio'),
+    (None, 'r'),
+    (None, 'refX'),
+    (None, 'refY'),
+    (None, 'repeatCount'),
+    (None, 'repeatDur'),
+    (None, 'requiredExtensions'),
+    (None, 'requiredFeatures'),
+    (None, 'restart'),
+    (None, 'rotate'),
+    (None, 'rx'),
+    (None, 'ry'),
+    (None, 'slope'),
+    (None, 'stemh'),
+    (None, 'stemv'),
+    (None, 'stop-color'),
+    (None, 'stop-opacity'),
+    (None, 'strikethrough-position'),
+    (None, 'strikethrough-thickness'),
+    (None, 'stroke'),
+    (None, 'stroke-dasharray'),
+    (None, 'stroke-dashoffset'),
+    (None, 'stroke-linecap'),
+    (None, 'stroke-linejoin'),
+    (None, 'stroke-miterlimit'),
+    (None, 'stroke-opacity'),
+    (None, 'stroke-width'),
+    (None, 'systemLanguage'),
+    (None, 'target'),
+    (None, 'text-anchor'),
+    (None, 'to'),
+    (None, 'transform'),
+    (None, 'type'),
+    (None, 'u1'),
+    (None, 'u2'),
+    (None, 'underline-position'),
+    (None, 'underline-thickness'),
+    (None, 'unicode'),
+    (None, 'unicode-range'),
+    (None, 'units-per-em'),
+    (None, 'values'),
+    (None, 'version'),
+    (None, 'viewBox'),
+    (None, 'visibility'),
+    (None, 'width'),
+    (None, 'widths'),
+    (None, 'x'),
+    (None, 'x-height'),
+    (None, 'x1'),
+    (None, 'x2'),
+    (namespaces['xlink'], 'actuate'),
+    (namespaces['xlink'], 'arcrole'),
+    (namespaces['xlink'], 'href'),
+    (namespaces['xlink'], 'role'),
+    (namespaces['xlink'], 'show'),
+    (namespaces['xlink'], 'title'),
+    (namespaces['xlink'], 'type'),
+    (namespaces['xml'], 'base'),
+    (namespaces['xml'], 'lang'),
+    (namespaces['xml'], 'space'),
+    (None, 'y'),
+    (None, 'y1'),
+    (None, 'y2'),
+    (None, 'zoomAndPan'),
+))
+
+attr_val_is_uri = frozenset((
+    (None, 'href'),
+    (None, 'src'),
+    (None, 'cite'),
+    (None, 'action'),
+    (None, 'longdesc'),
+    (None, 'poster'),
+    (None, 'background'),
+    (None, 'datasrc'),
+    (None, 'dynsrc'),
+    (None, 'lowsrc'),
+    (None, 'ping'),
+    (namespaces['xlink'], 'href'),
+    (namespaces['xml'], 'base'),
+))
+
+svg_attr_val_allows_ref = frozenset((
+    (None, 'clip-path'),
+    (None, 'color-profile'),
+    (None, 'cursor'),
+    (None, 'fill'),
+    (None, 'filter'),
+    (None, 'marker'),
+    (None, 'marker-start'),
+    (None, 'marker-mid'),
+    (None, 'marker-end'),
+    (None, 'mask'),
+    (None, 'stroke'),
+))
+
+svg_allow_local_href = frozenset((
+    (None, 'altGlyph'),
+    (None, 'animate'),
+    (None, 'animateColor'),
+    (None, 'animateMotion'),
+    (None, 'animateTransform'),
+    (None, 'cursor'),
+    (None, 'feImage'),
+    (None, 'filter'),
+    (None, 'linearGradient'),
+    (None, 'pattern'),
+    (None, 'radialGradient'),
+    (None, 'textpath'),
+    (None, 'tref'),
+    (None, 'set'),
+    (None, 'use')
+))
+
+allowed_css_properties = frozenset((
+    'azimuth',
+    'background-color',
+    'border-bottom-color',
+    'border-collapse',
+    'border-color',
+    'border-left-color',
+    'border-right-color',
+    'border-top-color',
+    'clear',
+    'color',
+    'cursor',
+    'direction',
+    'display',
+    'elevation',
+    'float',
+    'font',
+    'font-family',
+    'font-size',
+    'font-style',
+    'font-variant',
+    'font-weight',
+    'height',
+    'letter-spacing',
+    'line-height',
+    'overflow',
+    'pause',
+    'pause-after',
+    'pause-before',
+    'pitch',
+    'pitch-range',
+    'richness',
+    'speak',
+    'speak-header',
+    'speak-numeral',
+    'speak-punctuation',
+    'speech-rate',
+    'stress',
+    'text-align',
+    'text-decoration',
+    'text-indent',
+    'unicode-bidi',
+    'vertical-align',
+    'voice-family',
+    'volume',
+    'white-space',
+    'width',
+))
+
+allowed_css_keywords = frozenset((
+    'auto',
+    'aqua',
+    'black',
+    'block',
+    'blue',
+    'bold',
+    'both',
+    'bottom',
+    'brown',
+    'center',
+    'collapse',
+    'dashed',
+    'dotted',
+    'fuchsia',
+    'gray',
+    'green',
+    '!important',
+    'italic',
+    'left',
+    'lime',
+    'maroon',
+    'medium',
+    'none',
+    'navy',
+    'normal',
+    'nowrap',
+    'olive',
+    'pointer',
+    'purple',
+    'red',
+    'right',
+    'solid',
+    'silver',
+    'teal',
+    'top',
+    'transparent',
+    'underline',
+    'white',
+    'yellow',
+))
+
+allowed_svg_properties = frozenset((
+    'fill',
+    'fill-opacity',
+    'fill-rule',
+    'stroke',
+    'stroke-width',
+    'stroke-linecap',
+    'stroke-linejoin',
+    'stroke-opacity',
+))
+
+allowed_protocols = frozenset((
+    'ed2k',
+    'ftp',
+    'http',
+    'https',
+    'irc',
+    'mailto',
+    'news',
+    'gopher',
+    'nntp',
+    'telnet',
+    'webcal',
+    'xmpp',
+    'callto',
+    'feed',
+    'urn',
+    'aim',
+    'rsync',
+    'tag',
+    'ssh',
+    'sftp',
+    'rtsp',
+    'afs',
+    'data',
+))
+
+allowed_content_types = frozenset((
+    'image/png',
+    'image/jpeg',
+    'image/gif',
+    'image/webp',
+    'image/bmp',
+    'text/plain',
+))
+
+
+data_content_type = re.compile(r'''
+                                ^
+                                # Match a content type <application>/<type>
+                                (?P<content_type>[-a-zA-Z0-9.]+/[-a-zA-Z0-9.]+)
+                                # Match any character set and encoding
+                                (?:(?:;charset=(?:[-a-zA-Z0-9]+)(?:;(?:base64))?)
+                                  |(?:;(?:base64))?(?:;charset=(?:[-a-zA-Z0-9]+))?)
+                                # Assume the rest is data
+                                ,.*
+                                $
+                                ''',
+                               re.VERBOSE)
+
+
+class Filter(base.Filter):
+    """Sanitizes token stream of XHTML+MathML+SVG and of inline style attributes"""
+    def __init__(self,
+                 source,
+                 allowed_elements=allowed_elements,
+                 allowed_attributes=allowed_attributes,
+                 allowed_css_properties=allowed_css_properties,
+                 allowed_css_keywords=allowed_css_keywords,
+                 allowed_svg_properties=allowed_svg_properties,
+                 allowed_protocols=allowed_protocols,
+                 allowed_content_types=allowed_content_types,
+                 attr_val_is_uri=attr_val_is_uri,
+                 svg_attr_val_allows_ref=svg_attr_val_allows_ref,
+                 svg_allow_local_href=svg_allow_local_href):
+        """Creates a Filter
+
+        :arg allowed_elements: set of elements to allow--everything else will
+            be escaped
+
+        :arg allowed_attributes: set of attributes to allow in
+            elements--everything else will be stripped
+
+        :arg allowed_css_properties: set of CSS properties to allow--everything
+            else will be stripped
+
+        :arg allowed_css_keywords: set of CSS keywords to allow--everything
+            else will be stripped
+
+        :arg allowed_svg_properties: set of SVG properties to allow--everything
+            else will be removed
+
+        :arg allowed_protocols: set of allowed protocols for URIs
+
+        :arg allowed_content_types: set of allowed content types for ``data`` URIs.
+
+        :arg attr_val_is_uri: set of attributes that have URI values--values
+            that have a scheme not listed in ``allowed_protocols`` are removed
+
+        :arg svg_attr_val_allows_ref: set of SVG attributes that can have
+            references
+
+        :arg svg_allow_local_href: set of SVG elements that can have local
+            hrefs--these are removed
+
+        """
+        super(Filter, self).__init__(source)
+
+        warnings.warn(_deprecation_msg, DeprecationWarning)
+
+        self.allowed_elements = allowed_elements
+        self.allowed_attributes = allowed_attributes
+        self.allowed_css_properties = allowed_css_properties
+        self.allowed_css_keywords = allowed_css_keywords
+        self.allowed_svg_properties = allowed_svg_properties
+        self.allowed_protocols = allowed_protocols
+        self.allowed_content_types = allowed_content_types
+        self.attr_val_is_uri = attr_val_is_uri
+        self.svg_attr_val_allows_ref = svg_attr_val_allows_ref
+        self.svg_allow_local_href = svg_allow_local_href
+
+    def __iter__(self):
+        for token in base.Filter.__iter__(self):
+            token = self.sanitize_token(token)
+            if token:
+                yield token
+
+    # Sanitize the +html+, escaping all elements not in ALLOWED_ELEMENTS, and
+    # stripping out all attributes not in ALLOWED_ATTRIBUTES. Style attributes
+    # are parsed, and a restricted set, specified by ALLOWED_CSS_PROPERTIES and
+    # ALLOWED_CSS_KEYWORDS, are allowed through. attributes in ATTR_VAL_IS_URI
+    # are scanned, and only URI schemes specified in ALLOWED_PROTOCOLS are
+    # allowed.
+    #
+    #   sanitize_html('<script> do_nasty_stuff() </script>')
+    #    => &lt;script> do_nasty_stuff() &lt;/script>
+    #   sanitize_html('<a href="javascript: sucker();">Click here for $100</a>')
+    #    => <a>Click here for $100</a>
+    def sanitize_token(self, token):
+
+        # accommodate filters which use token_type differently
+        token_type = token["type"]
+        if token_type in ("StartTag", "EndTag", "EmptyTag"):
+            name = token["name"]
+            namespace = token["namespace"]
+            if ((namespace, name) in self.allowed_elements or
+                (namespace is None and
+                 (namespaces["html"], name) in self.allowed_elements)):
+                return self.allowed_token(token)
+            else:
+                return self.disallowed_token(token)
+        elif token_type == "Comment":
+            pass
+        else:
+            return token
+
+    def allowed_token(self, token):
+        if "data" in token:
+            attrs = token["data"]
+            attr_names = set(attrs.keys())
+
+            # Remove forbidden attributes
+            for to_remove in (attr_names - self.allowed_attributes):
+                del token["data"][to_remove]
+                attr_names.remove(to_remove)
+
+            # Remove attributes with disallowed URL values
+            for attr in (attr_names & self.attr_val_is_uri):
+                assert attr in attrs
+                # I don't have a clue where this regexp comes from or why it matches those
+                # characters, nor why we call unescape. I just know it's always been here.
+                # Should you be worried by this comment in a sanitizer? Yes. On the other hand, all
+                # this will do is remove *more* than it otherwise would.
+                val_unescaped = re.sub("[`\x00-\x20\x7f-\xa0\\s]+", '',
+                                       unescape(attrs[attr])).lower()
+                # remove replacement characters from unescaped characters
+                val_unescaped = val_unescaped.replace("\ufffd", "")
+                try:
+                    uri = urlparse.urlparse(val_unescaped)
+                except ValueError:
+                    uri = None
+                    del attrs[attr]
+                if uri and uri.scheme:
+                    if uri.scheme not in self.allowed_protocols:
+                        del attrs[attr]
+                    if uri.scheme == 'data':
+                        m = data_content_type.match(uri.path)
+                        if not m:
+                            del attrs[attr]
+                        elif m.group('content_type') not in self.allowed_content_types:
+                            del attrs[attr]
+
+            for attr in self.svg_attr_val_allows_ref:
+                if attr in attrs:
+                    attrs[attr] = re.sub(r'url\s*\(\s*[^#\s][^)]+?\)',
+                                         ' ',
+                                         unescape(attrs[attr]))
+            if (token["name"] in self.svg_allow_local_href and
+                (namespaces['xlink'], 'href') in attrs and re.search(r'^\s*[^#\s].*',
+                                                                     attrs[(namespaces['xlink'], 'href')])):
+                del attrs[(namespaces['xlink'], 'href')]
+            if (None, 'style') in attrs:
+                attrs[(None, 'style')] = self.sanitize_css(attrs[(None, 'style')])
+            token["data"] = attrs
+        return token
+
+    def disallowed_token(self, token):
+        token_type = token["type"]
+        if token_type == "EndTag":
+            token["data"] = "</%s>" % token["name"]
+        elif token["data"]:
+            assert token_type in ("StartTag", "EmptyTag")
+            attrs = []
+            for (ns, name), v in token["data"].items():
+                attrs.append(' %s="%s"' % (name if ns is None else "%s:%s" % (prefixes[ns], name), escape(v)))
+            token["data"] = "<%s%s>" % (token["name"], ''.join(attrs))
+        else:
+            token["data"] = "<%s>" % token["name"]
+        if token.get("selfClosing"):
+            token["data"] = token["data"][:-1] + "/>"
+
+        token["type"] = "Characters"
+
+        del token["name"]
+        return token
+
+    def sanitize_css(self, style):
+        # disallow urls
+        style = re.compile(r'url\s*\(\s*[^\s)]+?\s*\)\s*').sub(' ', style)
+
+        # gauntlet
+        if not re.match(r"""^([:,;#%.\sa-zA-Z0-9!]|\w-\w|'[\s\w]+'|"[\s\w]+"|\([\d,\s]+\))*$""", style):
+            return ''
+        if not re.match(r"^\s*([-\w]+\s*:[^:;]*(;\s*|$))*$", style):
+            return ''
+
+        clean = []
+        for prop, value in re.findall(r"([-\w]+)\s*:\s*([^:;]*)", style):
+            if not value:
+                continue
+            if prop.lower() in self.allowed_css_properties:
+                clean.append(prop + ': ' + value + ';')
+            elif prop.split('-')[0].lower() in ['background', 'border', 'margin',
+                                                'padding']:
+                for keyword in value.split():
+                    if keyword not in self.allowed_css_keywords and \
+                            not re.match(r"^(#[0-9a-fA-F]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|\d{0,2}\.?\d{0,2}(cm|em|ex|in|mm|pc|pt|px|%|,|\))?)$", keyword):  # noqa
+                        break
+                else:
+                    clean.append(prop + ': ' + value + ';')
+            elif prop.lower() in self.allowed_svg_properties:
+                clean.append(prop + ': ' + value + ';')
+
+        return ' '.join(clean)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/whitespace.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/whitespace.py
new file mode 100644
index 0000000..0d12584
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/filters/whitespace.py
@@ -0,0 +1,38 @@
+from __future__ import absolute_import, division, unicode_literals
+
+import re
+
+from . import base
+from ..constants import rcdataElements, spaceCharacters
+spaceCharacters = "".join(spaceCharacters)
+
+SPACES_REGEX = re.compile("[%s]+" % spaceCharacters)
+
+
+class Filter(base.Filter):
+    """Collapses whitespace except in pre, textarea, and script elements"""
+    spacePreserveElements = frozenset(["pre", "textarea"] + list(rcdataElements))
+
+    def __iter__(self):
+        preserve = 0
+        for token in base.Filter.__iter__(self):
+            type = token["type"]
+            if type == "StartTag" \
+                    and (preserve or token["name"] in self.spacePreserveElements):
+                preserve += 1
+
+            elif type == "EndTag" and preserve:
+                preserve -= 1
+
+            elif not preserve and type == "SpaceCharacters" and token["data"]:
+                # Test on token["data"] above to not introduce spaces where there were not
+                token["data"] = " "
+
+            elif not preserve and type == "Characters":
+                token["data"] = collapse_spaces(token["data"])
+
+            yield token
+
+
+def collapse_spaces(text):
+    return SPACES_REGEX.sub(' ', text)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/html5parser.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/html5parser.py
new file mode 100644
index 0000000..d06784f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/html5parser.py
@@ -0,0 +1,2795 @@
+from __future__ import absolute_import, division, unicode_literals
+from pip._vendor.six import with_metaclass, viewkeys
+
+import types
+
+from . import _inputstream
+from . import _tokenizer
+
+from . import treebuilders
+from .treebuilders.base import Marker
+
+from . import _utils
+from .constants import (
+    spaceCharacters, asciiUpper2Lower,
+    specialElements, headingElements, cdataElements, rcdataElements,
+    tokenTypes, tagTokenTypes,
+    namespaces,
+    htmlIntegrationPointElements, mathmlTextIntegrationPointElements,
+    adjustForeignAttributes as adjustForeignAttributesMap,
+    adjustMathMLAttributes, adjustSVGAttributes,
+    E,
+    _ReparseException
+)
+
+
+def parse(doc, treebuilder="etree", namespaceHTMLElements=True, **kwargs):
+    """Parse an HTML document as a string or file-like object into a tree
+
+    :arg doc: the document to parse as a string or file-like object
+
+    :arg treebuilder: the treebuilder to use when parsing
+
+    :arg namespaceHTMLElements: whether or not to namespace HTML elements
+
+    :returns: parsed tree
+
+    Example:
+
+    >>> from html5lib.html5parser import parse
+    >>> parse('<html><body><p>This is a doc</p></body></html>')
+    <Element u'{http://www.w3.org/1999/xhtml}html' at 0x7feac4909db0>
+
+    """
+    tb = treebuilders.getTreeBuilder(treebuilder)
+    p = HTMLParser(tb, namespaceHTMLElements=namespaceHTMLElements)
+    return p.parse(doc, **kwargs)
+
+
+def parseFragment(doc, container="div", treebuilder="etree", namespaceHTMLElements=True, **kwargs):
+    """Parse an HTML fragment as a string or file-like object into a tree
+
+    :arg doc: the fragment to parse as a string or file-like object
+
+    :arg container: the container context to parse the fragment in
+
+    :arg treebuilder: the treebuilder to use when parsing
+
+    :arg namespaceHTMLElements: whether or not to namespace HTML elements
+
+    :returns: parsed tree
+
+    Example:
+
+    >>> from html5lib.html5libparser import parseFragment
+    >>> parseFragment('<b>this is a fragment</b>')
+    <Element u'DOCUMENT_FRAGMENT' at 0x7feac484b090>
+
+    """
+    tb = treebuilders.getTreeBuilder(treebuilder)
+    p = HTMLParser(tb, namespaceHTMLElements=namespaceHTMLElements)
+    return p.parseFragment(doc, container=container, **kwargs)
+
+
+def method_decorator_metaclass(function):
+    class Decorated(type):
+        def __new__(meta, classname, bases, classDict):
+            for attributeName, attribute in classDict.items():
+                if isinstance(attribute, types.FunctionType):
+                    attribute = function(attribute)
+
+                classDict[attributeName] = attribute
+            return type.__new__(meta, classname, bases, classDict)
+    return Decorated
+
+
+class HTMLParser(object):
+    """HTML parser
+
+    Generates a tree structure from a stream of (possibly malformed) HTML.
+
+    """
+
+    def __init__(self, tree=None, strict=False, namespaceHTMLElements=True, debug=False):
+        """
+        :arg tree: a treebuilder class controlling the type of tree that will be
+            returned. Built in treebuilders can be accessed through
+            html5lib.treebuilders.getTreeBuilder(treeType)
+
+        :arg strict: raise an exception when a parse error is encountered
+
+        :arg namespaceHTMLElements: whether or not to namespace HTML elements
+
+        :arg debug: whether or not to enable debug mode which logs things
+
+        Example:
+
+        >>> from html5lib.html5parser import HTMLParser
+        >>> parser = HTMLParser()                     # generates parser with etree builder
+        >>> parser = HTMLParser('lxml', strict=True)  # generates parser with lxml builder which is strict
+
+        """
+
+        # Raise an exception on the first error encountered
+        self.strict = strict
+
+        if tree is None:
+            tree = treebuilders.getTreeBuilder("etree")
+        self.tree = tree(namespaceHTMLElements)
+        self.errors = []
+
+        self.phases = {name: cls(self, self.tree) for name, cls in
+                       getPhases(debug).items()}
+
+    def _parse(self, stream, innerHTML=False, container="div", scripting=False, **kwargs):
+
+        self.innerHTMLMode = innerHTML
+        self.container = container
+        self.scripting = scripting
+        self.tokenizer = _tokenizer.HTMLTokenizer(stream, parser=self, **kwargs)
+        self.reset()
+
+        try:
+            self.mainLoop()
+        except _ReparseException:
+            self.reset()
+            self.mainLoop()
+
+    def reset(self):
+        self.tree.reset()
+        self.firstStartTag = False
+        self.errors = []
+        self.log = []  # only used with debug mode
+        # "quirks" / "limited quirks" / "no quirks"
+        self.compatMode = "no quirks"
+
+        if self.innerHTMLMode:
+            self.innerHTML = self.container.lower()
+
+            if self.innerHTML in cdataElements:
+                self.tokenizer.state = self.tokenizer.rcdataState
+            elif self.innerHTML in rcdataElements:
+                self.tokenizer.state = self.tokenizer.rawtextState
+            elif self.innerHTML == 'plaintext':
+                self.tokenizer.state = self.tokenizer.plaintextState
+            else:
+                # state already is data state
+                # self.tokenizer.state = self.tokenizer.dataState
+                pass
+            self.phase = self.phases["beforeHtml"]
+            self.phase.insertHtmlElement()
+            self.resetInsertionMode()
+        else:
+            self.innerHTML = False  # pylint:disable=redefined-variable-type
+            self.phase = self.phases["initial"]
+
+        self.lastPhase = None
+
+        self.beforeRCDataPhase = None
+
+        self.framesetOK = True
+
+    @property
+    def documentEncoding(self):
+        """Name of the character encoding that was used to decode the input stream, or
+        :obj:`None` if that is not determined yet
+
+        """
+        if not hasattr(self, 'tokenizer'):
+            return None
+        return self.tokenizer.stream.charEncoding[0].name
+
+    def isHTMLIntegrationPoint(self, element):
+        if (element.name == "annotation-xml" and
+                element.namespace == namespaces["mathml"]):
+            return ("encoding" in element.attributes and
+                    element.attributes["encoding"].translate(
+                        asciiUpper2Lower) in
+                    ("text/html", "application/xhtml+xml"))
+        else:
+            return (element.namespace, element.name) in htmlIntegrationPointElements
+
+    def isMathMLTextIntegrationPoint(self, element):
+        return (element.namespace, element.name) in mathmlTextIntegrationPointElements
+
+    def mainLoop(self):
+        CharactersToken = tokenTypes["Characters"]
+        SpaceCharactersToken = tokenTypes["SpaceCharacters"]
+        StartTagToken = tokenTypes["StartTag"]
+        EndTagToken = tokenTypes["EndTag"]
+        CommentToken = tokenTypes["Comment"]
+        DoctypeToken = tokenTypes["Doctype"]
+        ParseErrorToken = tokenTypes["ParseError"]
+
+        for token in self.tokenizer:
+            prev_token = None
+            new_token = token
+            while new_token is not None:
+                prev_token = new_token
+                currentNode = self.tree.openElements[-1] if self.tree.openElements else None
+                currentNodeNamespace = currentNode.namespace if currentNode else None
+                currentNodeName = currentNode.name if currentNode else None
+
+                type = new_token["type"]
+
+                if type == ParseErrorToken:
+                    self.parseError(new_token["data"], new_token.get("datavars", {}))
+                    new_token = None
+                else:
+                    if (len(self.tree.openElements) == 0 or
+                        currentNodeNamespace == self.tree.defaultNamespace or
+                        (self.isMathMLTextIntegrationPoint(currentNode) and
+                         ((type == StartTagToken and
+                           token["name"] not in frozenset(["mglyph", "malignmark"])) or
+                          type in (CharactersToken, SpaceCharactersToken))) or
+                        (currentNodeNamespace == namespaces["mathml"] and
+                         currentNodeName == "annotation-xml" and
+                         type == StartTagToken and
+                         token["name"] == "svg") or
+                        (self.isHTMLIntegrationPoint(currentNode) and
+                         type in (StartTagToken, CharactersToken, SpaceCharactersToken))):
+                        phase = self.phase
+                    else:
+                        phase = self.phases["inForeignContent"]
+
+                    if type == CharactersToken:
+                        new_token = phase.processCharacters(new_token)
+                    elif type == SpaceCharactersToken:
+                        new_token = phase.processSpaceCharacters(new_token)
+                    elif type == StartTagToken:
+                        new_token = phase.processStartTag(new_token)
+                    elif type == EndTagToken:
+                        new_token = phase.processEndTag(new_token)
+                    elif type == CommentToken:
+                        new_token = phase.processComment(new_token)
+                    elif type == DoctypeToken:
+                        new_token = phase.processDoctype(new_token)
+
+            if (type == StartTagToken and prev_token["selfClosing"] and
+                    not prev_token["selfClosingAcknowledged"]):
+                self.parseError("non-void-element-with-trailing-solidus",
+                                {"name": prev_token["name"]})
+
+        # When the loop finishes it's EOF
+        reprocess = True
+        phases = []
+        while reprocess:
+            phases.append(self.phase)
+            reprocess = self.phase.processEOF()
+            if reprocess:
+                assert self.phase not in phases
+
+    def parse(self, stream, *args, **kwargs):
+        """Parse a HTML document into a well-formed tree
+
+        :arg stream: a file-like object or string containing the HTML to be parsed
+
+            The optional encoding parameter must be a string that indicates
+            the encoding.  If specified, that encoding will be used,
+            regardless of any BOM or later declaration (such as in a meta
+            element).
+
+        :arg scripting: treat noscript elements as if JavaScript was turned on
+
+        :returns: parsed tree
+
+        Example:
+
+        >>> from html5lib.html5parser import HTMLParser
+        >>> parser = HTMLParser()
+        >>> parser.parse('<html><body><p>This is a doc</p></body></html>')
+        <Element u'{http://www.w3.org/1999/xhtml}html' at 0x7feac4909db0>
+
+        """
+        self._parse(stream, False, None, *args, **kwargs)
+        return self.tree.getDocument()
+
+    def parseFragment(self, stream, *args, **kwargs):
+        """Parse a HTML fragment into a well-formed tree fragment
+
+        :arg container: name of the element we're setting the innerHTML
+            property if set to None, default to 'div'
+
+        :arg stream: a file-like object or string containing the HTML to be parsed
+
+            The optional encoding parameter must be a string that indicates
+            the encoding.  If specified, that encoding will be used,
+            regardless of any BOM or later declaration (such as in a meta
+            element)
+
+        :arg scripting: treat noscript elements as if JavaScript was turned on
+
+        :returns: parsed tree
+
+        Example:
+
+        >>> from html5lib.html5libparser import HTMLParser
+        >>> parser = HTMLParser()
+        >>> parser.parseFragment('<b>this is a fragment</b>')
+        <Element u'DOCUMENT_FRAGMENT' at 0x7feac484b090>
+
+        """
+        self._parse(stream, True, *args, **kwargs)
+        return self.tree.getFragment()
+
+    def parseError(self, errorcode="XXX-undefined-error", datavars=None):
+        # XXX The idea is to make errorcode mandatory.
+        if datavars is None:
+            datavars = {}
+        self.errors.append((self.tokenizer.stream.position(), errorcode, datavars))
+        if self.strict:
+            raise ParseError(E[errorcode] % datavars)
+
+    def adjustMathMLAttributes(self, token):
+        adjust_attributes(token, adjustMathMLAttributes)
+
+    def adjustSVGAttributes(self, token):
+        adjust_attributes(token, adjustSVGAttributes)
+
+    def adjustForeignAttributes(self, token):
+        adjust_attributes(token, adjustForeignAttributesMap)
+
+    def reparseTokenNormal(self, token):
+        # pylint:disable=unused-argument
+        self.parser.phase()
+
+    def resetInsertionMode(self):
+        # The name of this method is mostly historical. (It's also used in the
+        # specification.)
+        last = False
+        newModes = {
+            "select": "inSelect",
+            "td": "inCell",
+            "th": "inCell",
+            "tr": "inRow",
+            "tbody": "inTableBody",
+            "thead": "inTableBody",
+            "tfoot": "inTableBody",
+            "caption": "inCaption",
+            "colgroup": "inColumnGroup",
+            "table": "inTable",
+            "head": "inBody",
+            "body": "inBody",
+            "frameset": "inFrameset",
+            "html": "beforeHead"
+        }
+        for node in self.tree.openElements[::-1]:
+            nodeName = node.name
+            new_phase = None
+            if node == self.tree.openElements[0]:
+                assert self.innerHTML
+                last = True
+                nodeName = self.innerHTML
+            # Check for conditions that should only happen in the innerHTML
+            # case
+            if nodeName in ("select", "colgroup", "head", "html"):
+                assert self.innerHTML
+
+            if not last and node.namespace != self.tree.defaultNamespace:
+                continue
+
+            if nodeName in newModes:
+                new_phase = self.phases[newModes[nodeName]]
+                break
+            elif last:
+                new_phase = self.phases["inBody"]
+                break
+
+        self.phase = new_phase
+
+    def parseRCDataRawtext(self, token, contentType):
+        # Generic RCDATA/RAWTEXT Parsing algorithm
+        assert contentType in ("RAWTEXT", "RCDATA")
+
+        self.tree.insertElement(token)
+
+        if contentType == "RAWTEXT":
+            self.tokenizer.state = self.tokenizer.rawtextState
+        else:
+            self.tokenizer.state = self.tokenizer.rcdataState
+
+        self.originalPhase = self.phase
+
+        self.phase = self.phases["text"]
+
+
+@_utils.memoize
+def getPhases(debug):
+    def log(function):
+        """Logger that records which phase processes each token"""
+        type_names = {value: key for key, value in tokenTypes.items()}
+
+        def wrapped(self, *args, **kwargs):
+            if function.__name__.startswith("process") and len(args) > 0:
+                token = args[0]
+                info = {"type": type_names[token['type']]}
+                if token['type'] in tagTokenTypes:
+                    info["name"] = token['name']
+
+                self.parser.log.append((self.parser.tokenizer.state.__name__,
+                                        self.parser.phase.__class__.__name__,
+                                        self.__class__.__name__,
+                                        function.__name__,
+                                        info))
+                return function(self, *args, **kwargs)
+            else:
+                return function(self, *args, **kwargs)
+        return wrapped
+
+    def getMetaclass(use_metaclass, metaclass_func):
+        if use_metaclass:
+            return method_decorator_metaclass(metaclass_func)
+        else:
+            return type
+
+    # pylint:disable=unused-argument
+    class Phase(with_metaclass(getMetaclass(debug, log))):
+        """Base class for helper object that implements each phase of processing
+        """
+        __slots__ = ("parser", "tree", "__startTagCache", "__endTagCache")
+
+        def __init__(self, parser, tree):
+            self.parser = parser
+            self.tree = tree
+            self.__startTagCache = {}
+            self.__endTagCache = {}
+
+        def processEOF(self):
+            raise NotImplementedError
+
+        def processComment(self, token):
+            # For most phases the following is correct. Where it's not it will be
+            # overridden.
+            self.tree.insertComment(token, self.tree.openElements[-1])
+
+        def processDoctype(self, token):
+            self.parser.parseError("unexpected-doctype")
+
+        def processCharacters(self, token):
+            self.tree.insertText(token["data"])
+
+        def processSpaceCharacters(self, token):
+            self.tree.insertText(token["data"])
+
+        def processStartTag(self, token):
+            # Note the caching is done here rather than BoundMethodDispatcher as doing it there
+            # requires a circular reference to the Phase, and this ends up with a significant
+            # (CPython 2.7, 3.8) GC cost when parsing many short inputs
+            name = token["name"]
+            # In Py2, using `in` is quicker in general than try/except KeyError
+            # In Py3, `in` is quicker when there are few cache hits (typically short inputs)
+            if name in self.__startTagCache:
+                func = self.__startTagCache[name]
+            else:
+                func = self.__startTagCache[name] = self.startTagHandler[name]
+                # bound the cache size in case we get loads of unknown tags
+                while len(self.__startTagCache) > len(self.startTagHandler) * 1.1:
+                    # this makes the eviction policy random on Py < 3.7 and FIFO >= 3.7
+                    self.__startTagCache.pop(next(iter(self.__startTagCache)))
+            return func(token)
+
+        def startTagHtml(self, token):
+            if not self.parser.firstStartTag and token["name"] == "html":
+                self.parser.parseError("non-html-root")
+            # XXX Need a check here to see if the first start tag token emitted is
+            # this token... If it's not, invoke self.parser.parseError().
+            for attr, value in token["data"].items():
+                if attr not in self.tree.openElements[0].attributes:
+                    self.tree.openElements[0].attributes[attr] = value
+            self.parser.firstStartTag = False
+
+        def processEndTag(self, token):
+            # Note the caching is done here rather than BoundMethodDispatcher as doing it there
+            # requires a circular reference to the Phase, and this ends up with a significant
+            # (CPython 2.7, 3.8) GC cost when parsing many short inputs
+            name = token["name"]
+            # In Py2, using `in` is quicker in general than try/except KeyError
+            # In Py3, `in` is quicker when there are few cache hits (typically short inputs)
+            if name in self.__endTagCache:
+                func = self.__endTagCache[name]
+            else:
+                func = self.__endTagCache[name] = self.endTagHandler[name]
+                # bound the cache size in case we get loads of unknown tags
+                while len(self.__endTagCache) > len(self.endTagHandler) * 1.1:
+                    # this makes the eviction policy random on Py < 3.7 and FIFO >= 3.7
+                    self.__endTagCache.pop(next(iter(self.__endTagCache)))
+            return func(token)
+
+    class InitialPhase(Phase):
+        __slots__ = tuple()
+
+        def processSpaceCharacters(self, token):
+            pass
+
+        def processComment(self, token):
+            self.tree.insertComment(token, self.tree.document)
+
+        def processDoctype(self, token):
+            name = token["name"]
+            publicId = token["publicId"]
+            systemId = token["systemId"]
+            correct = token["correct"]
+
+            if (name != "html" or publicId is not None or
+                    systemId is not None and systemId != "about:legacy-compat"):
+                self.parser.parseError("unknown-doctype")
+
+            if publicId is None:
+                publicId = ""
+
+            self.tree.insertDoctype(token)
+
+            if publicId != "":
+                publicId = publicId.translate(asciiUpper2Lower)
+
+            if (not correct or token["name"] != "html" or
+                    publicId.startswith(
+                        ("+//silmaril//dtd html pro v0r11 19970101//",
+                         "-//advasoft ltd//dtd html 3.0 aswedit + extensions//",
+                         "-//as//dtd html 3.0 aswedit + extensions//",
+                         "-//ietf//dtd html 2.0 level 1//",
+                         "-//ietf//dtd html 2.0 level 2//",
+                         "-//ietf//dtd html 2.0 strict level 1//",
+                         "-//ietf//dtd html 2.0 strict level 2//",
+                         "-//ietf//dtd html 2.0 strict//",
+                         "-//ietf//dtd html 2.0//",
+                         "-//ietf//dtd html 2.1e//",
+                         "-//ietf//dtd html 3.0//",
+                         "-//ietf//dtd html 3.2 final//",
+                         "-//ietf//dtd html 3.2//",
+                         "-//ietf//dtd html 3//",
+                         "-//ietf//dtd html level 0//",
+                         "-//ietf//dtd html level 1//",
+                         "-//ietf//dtd html level 2//",
+                         "-//ietf//dtd html level 3//",
+                         "-//ietf//dtd html strict level 0//",
+                         "-//ietf//dtd html strict level 1//",
+                         "-//ietf//dtd html strict level 2//",
+                         "-//ietf//dtd html strict level 3//",
+                         "-//ietf//dtd html strict//",
+                         "-//ietf//dtd html//",
+                         "-//metrius//dtd metrius presentational//",
+                         "-//microsoft//dtd internet explorer 2.0 html strict//",
+                         "-//microsoft//dtd internet explorer 2.0 html//",
+                         "-//microsoft//dtd internet explorer 2.0 tables//",
+                         "-//microsoft//dtd internet explorer 3.0 html strict//",
+                         "-//microsoft//dtd internet explorer 3.0 html//",
+                         "-//microsoft//dtd internet explorer 3.0 tables//",
+                         "-//netscape comm. corp.//dtd html//",
+                         "-//netscape comm. corp.//dtd strict html//",
+                         "-//o'reilly and associates//dtd html 2.0//",
+                         "-//o'reilly and associates//dtd html extended 1.0//",
+                         "-//o'reilly and associates//dtd html extended relaxed 1.0//",
+                         "-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//",
+                         "-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//",
+                         "-//spyglass//dtd html 2.0 extended//",
+                         "-//sq//dtd html 2.0 hotmetal + extensions//",
+                         "-//sun microsystems corp.//dtd hotjava html//",
+                         "-//sun microsystems corp.//dtd hotjava strict html//",
+                         "-//w3c//dtd html 3 1995-03-24//",
+                         "-//w3c//dtd html 3.2 draft//",
+                         "-//w3c//dtd html 3.2 final//",
+                         "-//w3c//dtd html 3.2//",
+                         "-//w3c//dtd html 3.2s draft//",
+                         "-//w3c//dtd html 4.0 frameset//",
+                         "-//w3c//dtd html 4.0 transitional//",
+                         "-//w3c//dtd html experimental 19960712//",
+                         "-//w3c//dtd html experimental 970421//",
+                         "-//w3c//dtd w3 html//",
+                         "-//w3o//dtd w3 html 3.0//",
+                         "-//webtechs//dtd mozilla html 2.0//",
+                         "-//webtechs//dtd mozilla html//")) or
+                    publicId in ("-//w3o//dtd w3 html strict 3.0//en//",
+                                 "-/w3c/dtd html 4.0 transitional/en",
+                                 "html") or
+                    publicId.startswith(
+                        ("-//w3c//dtd html 4.01 frameset//",
+                         "-//w3c//dtd html 4.01 transitional//")) and
+                    systemId is None or
+                    systemId and systemId.lower() == "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"):
+                self.parser.compatMode = "quirks"
+            elif (publicId.startswith(
+                    ("-//w3c//dtd xhtml 1.0 frameset//",
+                     "-//w3c//dtd xhtml 1.0 transitional//")) or
+                  publicId.startswith(
+                      ("-//w3c//dtd html 4.01 frameset//",
+                       "-//w3c//dtd html 4.01 transitional//")) and
+                  systemId is not None):
+                self.parser.compatMode = "limited quirks"
+
+            self.parser.phase = self.parser.phases["beforeHtml"]
+
+        def anythingElse(self):
+            self.parser.compatMode = "quirks"
+            self.parser.phase = self.parser.phases["beforeHtml"]
+
+        def processCharacters(self, token):
+            self.parser.parseError("expected-doctype-but-got-chars")
+            self.anythingElse()
+            return token
+
+        def processStartTag(self, token):
+            self.parser.parseError("expected-doctype-but-got-start-tag",
+                                   {"name": token["name"]})
+            self.anythingElse()
+            return token
+
+        def processEndTag(self, token):
+            self.parser.parseError("expected-doctype-but-got-end-tag",
+                                   {"name": token["name"]})
+            self.anythingElse()
+            return token
+
+        def processEOF(self):
+            self.parser.parseError("expected-doctype-but-got-eof")
+            self.anythingElse()
+            return True
+
+    class BeforeHtmlPhase(Phase):
+        __slots__ = tuple()
+
+        # helper methods
+        def insertHtmlElement(self):
+            self.tree.insertRoot(impliedTagToken("html", "StartTag"))
+            self.parser.phase = self.parser.phases["beforeHead"]
+
+        # other
+        def processEOF(self):
+            self.insertHtmlElement()
+            return True
+
+        def processComment(self, token):
+            self.tree.insertComment(token, self.tree.document)
+
+        def processSpaceCharacters(self, token):
+            pass
+
+        def processCharacters(self, token):
+            self.insertHtmlElement()
+            return token
+
+        def processStartTag(self, token):
+            if token["name"] == "html":
+                self.parser.firstStartTag = True
+            self.insertHtmlElement()
+            return token
+
+        def processEndTag(self, token):
+            if token["name"] not in ("head", "body", "html", "br"):
+                self.parser.parseError("unexpected-end-tag-before-html",
+                                       {"name": token["name"]})
+            else:
+                self.insertHtmlElement()
+                return token
+
+    class BeforeHeadPhase(Phase):
+        __slots__ = tuple()
+
+        def processEOF(self):
+            self.startTagHead(impliedTagToken("head", "StartTag"))
+            return True
+
+        def processSpaceCharacters(self, token):
+            pass
+
+        def processCharacters(self, token):
+            self.startTagHead(impliedTagToken("head", "StartTag"))
+            return token
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagHead(self, token):
+            self.tree.insertElement(token)
+            self.tree.headPointer = self.tree.openElements[-1]
+            self.parser.phase = self.parser.phases["inHead"]
+
+        def startTagOther(self, token):
+            self.startTagHead(impliedTagToken("head", "StartTag"))
+            return token
+
+        def endTagImplyHead(self, token):
+            self.startTagHead(impliedTagToken("head", "StartTag"))
+            return token
+
+        def endTagOther(self, token):
+            self.parser.parseError("end-tag-after-implied-root",
+                                   {"name": token["name"]})
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", startTagHtml),
+            ("head", startTagHead)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            (("head", "body", "html", "br"), endTagImplyHead)
+        ])
+        endTagHandler.default = endTagOther
+
+    class InHeadPhase(Phase):
+        __slots__ = tuple()
+
+        # the real thing
+        def processEOF(self):
+            self.anythingElse()
+            return True
+
+        def processCharacters(self, token):
+            self.anythingElse()
+            return token
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagHead(self, token):
+            self.parser.parseError("two-heads-are-not-better-than-one")
+
+        def startTagBaseLinkCommand(self, token):
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+
+        def startTagMeta(self, token):
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+
+            attributes = token["data"]
+            if self.parser.tokenizer.stream.charEncoding[1] == "tentative":
+                if "charset" in attributes:
+                    self.parser.tokenizer.stream.changeEncoding(attributes["charset"])
+                elif ("content" in attributes and
+                      "http-equiv" in attributes and
+                      attributes["http-equiv"].lower() == "content-type"):
+                    # Encoding it as UTF-8 here is a hack, as really we should pass
+                    # the abstract Unicode string, and just use the
+                    # ContentAttrParser on that, but using UTF-8 allows all chars
+                    # to be encoded and as a ASCII-superset works.
+                    data = _inputstream.EncodingBytes(attributes["content"].encode("utf-8"))
+                    parser = _inputstream.ContentAttrParser(data)
+                    codec = parser.parse()
+                    self.parser.tokenizer.stream.changeEncoding(codec)
+
+        def startTagTitle(self, token):
+            self.parser.parseRCDataRawtext(token, "RCDATA")
+
+        def startTagNoFramesStyle(self, token):
+            # Need to decide whether to implement the scripting-disabled case
+            self.parser.parseRCDataRawtext(token, "RAWTEXT")
+
+        def startTagNoscript(self, token):
+            if self.parser.scripting:
+                self.parser.parseRCDataRawtext(token, "RAWTEXT")
+            else:
+                self.tree.insertElement(token)
+                self.parser.phase = self.parser.phases["inHeadNoscript"]
+
+        def startTagScript(self, token):
+            self.tree.insertElement(token)
+            self.parser.tokenizer.state = self.parser.tokenizer.scriptDataState
+            self.parser.originalPhase = self.parser.phase
+            self.parser.phase = self.parser.phases["text"]
+
+        def startTagOther(self, token):
+            self.anythingElse()
+            return token
+
+        def endTagHead(self, token):
+            node = self.parser.tree.openElements.pop()
+            assert node.name == "head", "Expected head got %s" % node.name
+            self.parser.phase = self.parser.phases["afterHead"]
+
+        def endTagHtmlBodyBr(self, token):
+            self.anythingElse()
+            return token
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def anythingElse(self):
+            self.endTagHead(impliedTagToken("head"))
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", startTagHtml),
+            ("title", startTagTitle),
+            (("noframes", "style"), startTagNoFramesStyle),
+            ("noscript", startTagNoscript),
+            ("script", startTagScript),
+            (("base", "basefont", "bgsound", "command", "link"),
+             startTagBaseLinkCommand),
+            ("meta", startTagMeta),
+            ("head", startTagHead)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            ("head", endTagHead),
+            (("br", "html", "body"), endTagHtmlBodyBr)
+        ])
+        endTagHandler.default = endTagOther
+
+    class InHeadNoscriptPhase(Phase):
+        __slots__ = tuple()
+
+        def processEOF(self):
+            self.parser.parseError("eof-in-head-noscript")
+            self.anythingElse()
+            return True
+
+        def processComment(self, token):
+            return self.parser.phases["inHead"].processComment(token)
+
+        def processCharacters(self, token):
+            self.parser.parseError("char-in-head-noscript")
+            self.anythingElse()
+            return token
+
+        def processSpaceCharacters(self, token):
+            return self.parser.phases["inHead"].processSpaceCharacters(token)
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagBaseLinkCommand(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagHeadNoscript(self, token):
+            self.parser.parseError("unexpected-start-tag", {"name": token["name"]})
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-inhead-noscript-tag", {"name": token["name"]})
+            self.anythingElse()
+            return token
+
+        def endTagNoscript(self, token):
+            node = self.parser.tree.openElements.pop()
+            assert node.name == "noscript", "Expected noscript got %s" % node.name
+            self.parser.phase = self.parser.phases["inHead"]
+
+        def endTagBr(self, token):
+            self.parser.parseError("unexpected-inhead-noscript-tag", {"name": token["name"]})
+            self.anythingElse()
+            return token
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def anythingElse(self):
+            # Caller must raise parse error first!
+            self.endTagNoscript(impliedTagToken("noscript"))
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", startTagHtml),
+            (("basefont", "bgsound", "link", "meta", "noframes", "style"), startTagBaseLinkCommand),
+            (("head", "noscript"), startTagHeadNoscript),
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            ("noscript", endTagNoscript),
+            ("br", endTagBr),
+        ])
+        endTagHandler.default = endTagOther
+
+    class AfterHeadPhase(Phase):
+        __slots__ = tuple()
+
+        def processEOF(self):
+            self.anythingElse()
+            return True
+
+        def processCharacters(self, token):
+            self.anythingElse()
+            return token
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagBody(self, token):
+            self.parser.framesetOK = False
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inBody"]
+
+        def startTagFrameset(self, token):
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inFrameset"]
+
+        def startTagFromHead(self, token):
+            self.parser.parseError("unexpected-start-tag-out-of-my-head",
+                                   {"name": token["name"]})
+            self.tree.openElements.append(self.tree.headPointer)
+            self.parser.phases["inHead"].processStartTag(token)
+            for node in self.tree.openElements[::-1]:
+                if node.name == "head":
+                    self.tree.openElements.remove(node)
+                    break
+
+        def startTagHead(self, token):
+            self.parser.parseError("unexpected-start-tag", {"name": token["name"]})
+
+        def startTagOther(self, token):
+            self.anythingElse()
+            return token
+
+        def endTagHtmlBodyBr(self, token):
+            self.anythingElse()
+            return token
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def anythingElse(self):
+            self.tree.insertElement(impliedTagToken("body", "StartTag"))
+            self.parser.phase = self.parser.phases["inBody"]
+            self.parser.framesetOK = True
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", startTagHtml),
+            ("body", startTagBody),
+            ("frameset", startTagFrameset),
+            (("base", "basefont", "bgsound", "link", "meta", "noframes", "script",
+              "style", "title"),
+             startTagFromHead),
+            ("head", startTagHead)
+        ])
+        startTagHandler.default = startTagOther
+        endTagHandler = _utils.MethodDispatcher([(("body", "html", "br"),
+                                                  endTagHtmlBodyBr)])
+        endTagHandler.default = endTagOther
+
+    class InBodyPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#parsing-main-inbody
+        # the really-really-really-very crazy mode
+        __slots__ = ("processSpaceCharacters",)
+
+        def __init__(self, *args, **kwargs):
+            super(InBodyPhase, self).__init__(*args, **kwargs)
+            # Set this to the default handler
+            self.processSpaceCharacters = self.processSpaceCharactersNonPre
+
+        def isMatchingFormattingElement(self, node1, node2):
+            return (node1.name == node2.name and
+                    node1.namespace == node2.namespace and
+                    node1.attributes == node2.attributes)
+
+        # helper
+        def addFormattingElement(self, token):
+            self.tree.insertElement(token)
+            element = self.tree.openElements[-1]
+
+            matchingElements = []
+            for node in self.tree.activeFormattingElements[::-1]:
+                if node is Marker:
+                    break
+                elif self.isMatchingFormattingElement(node, element):
+                    matchingElements.append(node)
+
+            assert len(matchingElements) <= 3
+            if len(matchingElements) == 3:
+                self.tree.activeFormattingElements.remove(matchingElements[-1])
+            self.tree.activeFormattingElements.append(element)
+
+        # the real deal
+        def processEOF(self):
+            allowed_elements = frozenset(("dd", "dt", "li", "p", "tbody", "td",
+                                          "tfoot", "th", "thead", "tr", "body",
+                                          "html"))
+            for node in self.tree.openElements[::-1]:
+                if node.name not in allowed_elements:
+                    self.parser.parseError("expected-closing-tag-but-got-eof")
+                    break
+            # Stop parsing
+
+        def processSpaceCharactersDropNewline(self, token):
+            # Sometimes (start of <pre>, <listing>, and <textarea> blocks) we
+            # want to drop leading newlines
+            data = token["data"]
+            self.processSpaceCharacters = self.processSpaceCharactersNonPre
+            if (data.startswith("\n") and
+                self.tree.openElements[-1].name in ("pre", "listing", "textarea") and
+                    not self.tree.openElements[-1].hasContent()):
+                data = data[1:]
+            if data:
+                self.tree.reconstructActiveFormattingElements()
+                self.tree.insertText(data)
+
+        def processCharacters(self, token):
+            if token["data"] == "\u0000":
+                # The tokenizer should always emit null on its own
+                return
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertText(token["data"])
+            # This must be bad for performance
+            if (self.parser.framesetOK and
+                any([char not in spaceCharacters
+                     for char in token["data"]])):
+                self.parser.framesetOK = False
+
+        def processSpaceCharactersNonPre(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertText(token["data"])
+
+        def startTagProcessInHead(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagBody(self, token):
+            self.parser.parseError("unexpected-start-tag", {"name": "body"})
+            if (len(self.tree.openElements) == 1 or
+                    self.tree.openElements[1].name != "body"):
+                assert self.parser.innerHTML
+            else:
+                self.parser.framesetOK = False
+                for attr, value in token["data"].items():
+                    if attr not in self.tree.openElements[1].attributes:
+                        self.tree.openElements[1].attributes[attr] = value
+
+        def startTagFrameset(self, token):
+            self.parser.parseError("unexpected-start-tag", {"name": "frameset"})
+            if (len(self.tree.openElements) == 1 or self.tree.openElements[1].name != "body"):
+                assert self.parser.innerHTML
+            elif not self.parser.framesetOK:
+                pass
+            else:
+                if self.tree.openElements[1].parent:
+                    self.tree.openElements[1].parent.removeChild(self.tree.openElements[1])
+                while self.tree.openElements[-1].name != "html":
+                    self.tree.openElements.pop()
+                self.tree.insertElement(token)
+                self.parser.phase = self.parser.phases["inFrameset"]
+
+        def startTagCloseP(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            self.tree.insertElement(token)
+
+        def startTagPreListing(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            self.tree.insertElement(token)
+            self.parser.framesetOK = False
+            self.processSpaceCharacters = self.processSpaceCharactersDropNewline
+
+        def startTagForm(self, token):
+            if self.tree.formPointer:
+                self.parser.parseError("unexpected-start-tag", {"name": "form"})
+            else:
+                if self.tree.elementInScope("p", variant="button"):
+                    self.endTagP(impliedTagToken("p"))
+                self.tree.insertElement(token)
+                self.tree.formPointer = self.tree.openElements[-1]
+
+        def startTagListItem(self, token):
+            self.parser.framesetOK = False
+
+            stopNamesMap = {"li": ["li"],
+                            "dt": ["dt", "dd"],
+                            "dd": ["dt", "dd"]}
+            stopNames = stopNamesMap[token["name"]]
+            for node in reversed(self.tree.openElements):
+                if node.name in stopNames:
+                    self.parser.phase.processEndTag(
+                        impliedTagToken(node.name, "EndTag"))
+                    break
+                if (node.nameTuple in specialElements and
+                        node.name not in ("address", "div", "p")):
+                    break
+
+            if self.tree.elementInScope("p", variant="button"):
+                self.parser.phase.processEndTag(
+                    impliedTagToken("p", "EndTag"))
+
+            self.tree.insertElement(token)
+
+        def startTagPlaintext(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            self.tree.insertElement(token)
+            self.parser.tokenizer.state = self.parser.tokenizer.plaintextState
+
+        def startTagHeading(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            if self.tree.openElements[-1].name in headingElements:
+                self.parser.parseError("unexpected-start-tag", {"name": token["name"]})
+                self.tree.openElements.pop()
+            self.tree.insertElement(token)
+
+        def startTagA(self, token):
+            afeAElement = self.tree.elementInActiveFormattingElements("a")
+            if afeAElement:
+                self.parser.parseError("unexpected-start-tag-implies-end-tag",
+                                       {"startName": "a", "endName": "a"})
+                self.endTagFormatting(impliedTagToken("a"))
+                if afeAElement in self.tree.openElements:
+                    self.tree.openElements.remove(afeAElement)
+                if afeAElement in self.tree.activeFormattingElements:
+                    self.tree.activeFormattingElements.remove(afeAElement)
+            self.tree.reconstructActiveFormattingElements()
+            self.addFormattingElement(token)
+
+        def startTagFormatting(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.addFormattingElement(token)
+
+        def startTagNobr(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            if self.tree.elementInScope("nobr"):
+                self.parser.parseError("unexpected-start-tag-implies-end-tag",
+                                       {"startName": "nobr", "endName": "nobr"})
+                self.processEndTag(impliedTagToken("nobr"))
+                # XXX Need tests that trigger the following
+                self.tree.reconstructActiveFormattingElements()
+            self.addFormattingElement(token)
+
+        def startTagButton(self, token):
+            if self.tree.elementInScope("button"):
+                self.parser.parseError("unexpected-start-tag-implies-end-tag",
+                                       {"startName": "button", "endName": "button"})
+                self.processEndTag(impliedTagToken("button"))
+                return token
+            else:
+                self.tree.reconstructActiveFormattingElements()
+                self.tree.insertElement(token)
+                self.parser.framesetOK = False
+
+        def startTagAppletMarqueeObject(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertElement(token)
+            self.tree.activeFormattingElements.append(Marker)
+            self.parser.framesetOK = False
+
+        def startTagXmp(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            self.tree.reconstructActiveFormattingElements()
+            self.parser.framesetOK = False
+            self.parser.parseRCDataRawtext(token, "RAWTEXT")
+
+        def startTagTable(self, token):
+            if self.parser.compatMode != "quirks":
+                if self.tree.elementInScope("p", variant="button"):
+                    self.processEndTag(impliedTagToken("p"))
+            self.tree.insertElement(token)
+            self.parser.framesetOK = False
+            self.parser.phase = self.parser.phases["inTable"]
+
+        def startTagVoidFormatting(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+            self.parser.framesetOK = False
+
+        def startTagInput(self, token):
+            framesetOK = self.parser.framesetOK
+            self.startTagVoidFormatting(token)
+            if ("type" in token["data"] and
+                    token["data"]["type"].translate(asciiUpper2Lower) == "hidden"):
+                # input type=hidden doesn't change framesetOK
+                self.parser.framesetOK = framesetOK
+
+        def startTagParamSource(self, token):
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+
+        def startTagHr(self, token):
+            if self.tree.elementInScope("p", variant="button"):
+                self.endTagP(impliedTagToken("p"))
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+            self.parser.framesetOK = False
+
+        def startTagImage(self, token):
+            # No really...
+            self.parser.parseError("unexpected-start-tag-treated-as",
+                                   {"originalName": "image", "newName": "img"})
+            self.processStartTag(impliedTagToken("img", "StartTag",
+                                                 attributes=token["data"],
+                                                 selfClosing=token["selfClosing"]))
+
+        def startTagIsIndex(self, token):
+            self.parser.parseError("deprecated-tag", {"name": "isindex"})
+            if self.tree.formPointer:
+                return
+            form_attrs = {}
+            if "action" in token["data"]:
+                form_attrs["action"] = token["data"]["action"]
+            self.processStartTag(impliedTagToken("form", "StartTag",
+                                                 attributes=form_attrs))
+            self.processStartTag(impliedTagToken("hr", "StartTag"))
+            self.processStartTag(impliedTagToken("label", "StartTag"))
+            # XXX Localization ...
+            if "prompt" in token["data"]:
+                prompt = token["data"]["prompt"]
+            else:
+                prompt = "This is a searchable index. Enter search keywords: "
+            self.processCharacters(
+                {"type": tokenTypes["Characters"], "data": prompt})
+            attributes = token["data"].copy()
+            if "action" in attributes:
+                del attributes["action"]
+            if "prompt" in attributes:
+                del attributes["prompt"]
+            attributes["name"] = "isindex"
+            self.processStartTag(impliedTagToken("input", "StartTag",
+                                                 attributes=attributes,
+                                                 selfClosing=token["selfClosing"]))
+            self.processEndTag(impliedTagToken("label"))
+            self.processStartTag(impliedTagToken("hr", "StartTag"))
+            self.processEndTag(impliedTagToken("form"))
+
+        def startTagTextarea(self, token):
+            self.tree.insertElement(token)
+            self.parser.tokenizer.state = self.parser.tokenizer.rcdataState
+            self.processSpaceCharacters = self.processSpaceCharactersDropNewline
+            self.parser.framesetOK = False
+
+        def startTagIFrame(self, token):
+            self.parser.framesetOK = False
+            self.startTagRawtext(token)
+
+        def startTagNoscript(self, token):
+            if self.parser.scripting:
+                self.startTagRawtext(token)
+            else:
+                self.startTagOther(token)
+
+        def startTagRawtext(self, token):
+            """iframe, noembed noframes, noscript(if scripting enabled)"""
+            self.parser.parseRCDataRawtext(token, "RAWTEXT")
+
+        def startTagOpt(self, token):
+            if self.tree.openElements[-1].name == "option":
+                self.parser.phase.processEndTag(impliedTagToken("option"))
+            self.tree.reconstructActiveFormattingElements()
+            self.parser.tree.insertElement(token)
+
+        def startTagSelect(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertElement(token)
+            self.parser.framesetOK = False
+            if self.parser.phase in (self.parser.phases["inTable"],
+                                     self.parser.phases["inCaption"],
+                                     self.parser.phases["inColumnGroup"],
+                                     self.parser.phases["inTableBody"],
+                                     self.parser.phases["inRow"],
+                                     self.parser.phases["inCell"]):
+                self.parser.phase = self.parser.phases["inSelectInTable"]
+            else:
+                self.parser.phase = self.parser.phases["inSelect"]
+
+        def startTagRpRt(self, token):
+            if self.tree.elementInScope("ruby"):
+                self.tree.generateImpliedEndTags()
+                if self.tree.openElements[-1].name != "ruby":
+                    self.parser.parseError()
+            self.tree.insertElement(token)
+
+        def startTagMath(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.parser.adjustMathMLAttributes(token)
+            self.parser.adjustForeignAttributes(token)
+            token["namespace"] = namespaces["mathml"]
+            self.tree.insertElement(token)
+            # Need to get the parse error right for the case where the token
+            # has a namespace not equal to the xmlns attribute
+            if token["selfClosing"]:
+                self.tree.openElements.pop()
+                token["selfClosingAcknowledged"] = True
+
+        def startTagSvg(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.parser.adjustSVGAttributes(token)
+            self.parser.adjustForeignAttributes(token)
+            token["namespace"] = namespaces["svg"]
+            self.tree.insertElement(token)
+            # Need to get the parse error right for the case where the token
+            # has a namespace not equal to the xmlns attribute
+            if token["selfClosing"]:
+                self.tree.openElements.pop()
+                token["selfClosingAcknowledged"] = True
+
+        def startTagMisplaced(self, token):
+            """ Elements that should be children of other elements that have a
+            different insertion mode; here they are ignored
+            "caption", "col", "colgroup", "frame", "frameset", "head",
+            "option", "optgroup", "tbody", "td", "tfoot", "th", "thead",
+            "tr", "noscript"
+            """
+            self.parser.parseError("unexpected-start-tag-ignored", {"name": token["name"]})
+
+        def startTagOther(self, token):
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertElement(token)
+
+        def endTagP(self, token):
+            if not self.tree.elementInScope("p", variant="button"):
+                self.startTagCloseP(impliedTagToken("p", "StartTag"))
+                self.parser.parseError("unexpected-end-tag", {"name": "p"})
+                self.endTagP(impliedTagToken("p", "EndTag"))
+            else:
+                self.tree.generateImpliedEndTags("p")
+                if self.tree.openElements[-1].name != "p":
+                    self.parser.parseError("unexpected-end-tag", {"name": "p"})
+                node = self.tree.openElements.pop()
+                while node.name != "p":
+                    node = self.tree.openElements.pop()
+
+        def endTagBody(self, token):
+            if not self.tree.elementInScope("body"):
+                self.parser.parseError()
+                return
+            elif self.tree.openElements[-1].name != "body":
+                for node in self.tree.openElements[2:]:
+                    if node.name not in frozenset(("dd", "dt", "li", "optgroup",
+                                                   "option", "p", "rp", "rt",
+                                                   "tbody", "td", "tfoot",
+                                                   "th", "thead", "tr", "body",
+                                                   "html")):
+                        # Not sure this is the correct name for the parse error
+                        self.parser.parseError(
+                            "expected-one-end-tag-but-got-another",
+                            {"gotName": "body", "expectedName": node.name})
+                        break
+            self.parser.phase = self.parser.phases["afterBody"]
+
+        def endTagHtml(self, token):
+            # We repeat the test for the body end tag token being ignored here
+            if self.tree.elementInScope("body"):
+                self.endTagBody(impliedTagToken("body"))
+                return token
+
+        def endTagBlock(self, token):
+            # Put us back in the right whitespace handling mode
+            if token["name"] == "pre":
+                self.processSpaceCharacters = self.processSpaceCharactersNonPre
+            inScope = self.tree.elementInScope(token["name"])
+            if inScope:
+                self.tree.generateImpliedEndTags()
+            if self.tree.openElements[-1].name != token["name"]:
+                self.parser.parseError("end-tag-too-early", {"name": token["name"]})
+            if inScope:
+                node = self.tree.openElements.pop()
+                while node.name != token["name"]:
+                    node = self.tree.openElements.pop()
+
+        def endTagForm(self, token):
+            node = self.tree.formPointer
+            self.tree.formPointer = None
+            if node is None or not self.tree.elementInScope(node):
+                self.parser.parseError("unexpected-end-tag",
+                                       {"name": "form"})
+            else:
+                self.tree.generateImpliedEndTags()
+                if self.tree.openElements[-1] != node:
+                    self.parser.parseError("end-tag-too-early-ignored",
+                                           {"name": "form"})
+                self.tree.openElements.remove(node)
+
+        def endTagListItem(self, token):
+            if token["name"] == "li":
+                variant = "list"
+            else:
+                variant = None
+            if not self.tree.elementInScope(token["name"], variant=variant):
+                self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+            else:
+                self.tree.generateImpliedEndTags(exclude=token["name"])
+                if self.tree.openElements[-1].name != token["name"]:
+                    self.parser.parseError(
+                        "end-tag-too-early",
+                        {"name": token["name"]})
+                node = self.tree.openElements.pop()
+                while node.name != token["name"]:
+                    node = self.tree.openElements.pop()
+
+        def endTagHeading(self, token):
+            for item in headingElements:
+                if self.tree.elementInScope(item):
+                    self.tree.generateImpliedEndTags()
+                    break
+            if self.tree.openElements[-1].name != token["name"]:
+                self.parser.parseError("end-tag-too-early", {"name": token["name"]})
+
+            for item in headingElements:
+                if self.tree.elementInScope(item):
+                    item = self.tree.openElements.pop()
+                    while item.name not in headingElements:
+                        item = self.tree.openElements.pop()
+                    break
+
+        def endTagFormatting(self, token):
+            """The much-feared adoption agency algorithm"""
+            # http://svn.whatwg.org/webapps/complete.html#adoptionAgency revision 7867
+            # XXX Better parseError messages appreciated.
+
+            # Step 1
+            outerLoopCounter = 0
+
+            # Step 2
+            while outerLoopCounter < 8:
+
+                # Step 3
+                outerLoopCounter += 1
+
+                # Step 4:
+
+                # Let the formatting element be the last element in
+                # the list of active formatting elements that:
+                # - is between the end of the list and the last scope
+                # marker in the list, if any, or the start of the list
+                # otherwise, and
+                # - has the same tag name as the token.
+                formattingElement = self.tree.elementInActiveFormattingElements(
+                    token["name"])
+                if (not formattingElement or
+                    (formattingElement in self.tree.openElements and
+                     not self.tree.elementInScope(formattingElement.name))):
+                    # If there is no such node, then abort these steps
+                    # and instead act as described in the "any other
+                    # end tag" entry below.
+                    self.endTagOther(token)
+                    return
+
+                # Otherwise, if there is such a node, but that node is
+                # not in the stack of open elements, then this is a
+                # parse error; remove the element from the list, and
+                # abort these steps.
+                elif formattingElement not in self.tree.openElements:
+                    self.parser.parseError("adoption-agency-1.2", {"name": token["name"]})
+                    self.tree.activeFormattingElements.remove(formattingElement)
+                    return
+
+                # Otherwise, if there is such a node, and that node is
+                # also in the stack of open elements, but the element
+                # is not in scope, then this is a parse error; ignore
+                # the token, and abort these steps.
+                elif not self.tree.elementInScope(formattingElement.name):
+                    self.parser.parseError("adoption-agency-4.4", {"name": token["name"]})
+                    return
+
+                # Otherwise, there is a formatting element and that
+                # element is in the stack and is in scope. If the
+                # element is not the current node, this is a parse
+                # error. In any case, proceed with the algorithm as
+                # written in the following steps.
+                else:
+                    if formattingElement != self.tree.openElements[-1]:
+                        self.parser.parseError("adoption-agency-1.3", {"name": token["name"]})
+
+                # Step 5:
+
+                # Let the furthest block be the topmost node in the
+                # stack of open elements that is lower in the stack
+                # than the formatting element, and is an element in
+                # the special category. There might not be one.
+                afeIndex = self.tree.openElements.index(formattingElement)
+                furthestBlock = None
+                for element in self.tree.openElements[afeIndex:]:
+                    if element.nameTuple in specialElements:
+                        furthestBlock = element
+                        break
+
+                # Step 6:
+
+                # If there is no furthest block, then the UA must
+                # first pop all the nodes from the bottom of the stack
+                # of open elements, from the current node up to and
+                # including the formatting element, then remove the
+                # formatting element from the list of active
+                # formatting elements, and finally abort these steps.
+                if furthestBlock is None:
+                    element = self.tree.openElements.pop()
+                    while element != formattingElement:
+                        element = self.tree.openElements.pop()
+                    self.tree.activeFormattingElements.remove(element)
+                    return
+
+                # Step 7
+                commonAncestor = self.tree.openElements[afeIndex - 1]
+
+                # Step 8:
+                # The bookmark is supposed to help us identify where to reinsert
+                # nodes in step 15. We have to ensure that we reinsert nodes after
+                # the node before the active formatting element. Note the bookmark
+                # can move in step 9.7
+                bookmark = self.tree.activeFormattingElements.index(formattingElement)
+
+                # Step 9
+                lastNode = node = furthestBlock
+                innerLoopCounter = 0
+
+                index = self.tree.openElements.index(node)
+                while innerLoopCounter < 3:
+                    innerLoopCounter += 1
+                    # Node is element before node in open elements
+                    index -= 1
+                    node = self.tree.openElements[index]
+                    if node not in self.tree.activeFormattingElements:
+                        self.tree.openElements.remove(node)
+                        continue
+                    # Step 9.6
+                    if node == formattingElement:
+                        break
+                    # Step 9.7
+                    if lastNode == furthestBlock:
+                        bookmark = self.tree.activeFormattingElements.index(node) + 1
+                    # Step 9.8
+                    clone = node.cloneNode()
+                    # Replace node with clone
+                    self.tree.activeFormattingElements[
+                        self.tree.activeFormattingElements.index(node)] = clone
+                    self.tree.openElements[
+                        self.tree.openElements.index(node)] = clone
+                    node = clone
+                    # Step 9.9
+                    # Remove lastNode from its parents, if any
+                    if lastNode.parent:
+                        lastNode.parent.removeChild(lastNode)
+                    node.appendChild(lastNode)
+                    # Step 9.10
+                    lastNode = node
+
+                # Step 10
+                # Foster parent lastNode if commonAncestor is a
+                # table, tbody, tfoot, thead, or tr we need to foster
+                # parent the lastNode
+                if lastNode.parent:
+                    lastNode.parent.removeChild(lastNode)
+
+                if commonAncestor.name in frozenset(("table", "tbody", "tfoot", "thead", "tr")):
+                    parent, insertBefore = self.tree.getTableMisnestedNodePosition()
+                    parent.insertBefore(lastNode, insertBefore)
+                else:
+                    commonAncestor.appendChild(lastNode)
+
+                # Step 11
+                clone = formattingElement.cloneNode()
+
+                # Step 12
+                furthestBlock.reparentChildren(clone)
+
+                # Step 13
+                furthestBlock.appendChild(clone)
+
+                # Step 14
+                self.tree.activeFormattingElements.remove(formattingElement)
+                self.tree.activeFormattingElements.insert(bookmark, clone)
+
+                # Step 15
+                self.tree.openElements.remove(formattingElement)
+                self.tree.openElements.insert(
+                    self.tree.openElements.index(furthestBlock) + 1, clone)
+
+        def endTagAppletMarqueeObject(self, token):
+            if self.tree.elementInScope(token["name"]):
+                self.tree.generateImpliedEndTags()
+            if self.tree.openElements[-1].name != token["name"]:
+                self.parser.parseError("end-tag-too-early", {"name": token["name"]})
+
+            if self.tree.elementInScope(token["name"]):
+                element = self.tree.openElements.pop()
+                while element.name != token["name"]:
+                    element = self.tree.openElements.pop()
+                self.tree.clearActiveFormattingElements()
+
+        def endTagBr(self, token):
+            self.parser.parseError("unexpected-end-tag-treated-as",
+                                   {"originalName": "br", "newName": "br element"})
+            self.tree.reconstructActiveFormattingElements()
+            self.tree.insertElement(impliedTagToken("br", "StartTag"))
+            self.tree.openElements.pop()
+
+        def endTagOther(self, token):
+            for node in self.tree.openElements[::-1]:
+                if node.name == token["name"]:
+                    self.tree.generateImpliedEndTags(exclude=token["name"])
+                    if self.tree.openElements[-1].name != token["name"]:
+                        self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+                    while self.tree.openElements.pop() != node:
+                        pass
+                    break
+                else:
+                    if node.nameTuple in specialElements:
+                        self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+                        break
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", Phase.startTagHtml),
+            (("base", "basefont", "bgsound", "command", "link", "meta",
+              "script", "style", "title"),
+             startTagProcessInHead),
+            ("body", startTagBody),
+            ("frameset", startTagFrameset),
+            (("address", "article", "aside", "blockquote", "center", "details",
+              "dir", "div", "dl", "fieldset", "figcaption", "figure",
+              "footer", "header", "hgroup", "main", "menu", "nav", "ol", "p",
+              "section", "summary", "ul"),
+             startTagCloseP),
+            (headingElements, startTagHeading),
+            (("pre", "listing"), startTagPreListing),
+            ("form", startTagForm),
+            (("li", "dd", "dt"), startTagListItem),
+            ("plaintext", startTagPlaintext),
+            ("a", startTagA),
+            (("b", "big", "code", "em", "font", "i", "s", "small", "strike",
+              "strong", "tt", "u"), startTagFormatting),
+            ("nobr", startTagNobr),
+            ("button", startTagButton),
+            (("applet", "marquee", "object"), startTagAppletMarqueeObject),
+            ("xmp", startTagXmp),
+            ("table", startTagTable),
+            (("area", "br", "embed", "img", "keygen", "wbr"),
+             startTagVoidFormatting),
+            (("param", "source", "track"), startTagParamSource),
+            ("input", startTagInput),
+            ("hr", startTagHr),
+            ("image", startTagImage),
+            ("isindex", startTagIsIndex),
+            ("textarea", startTagTextarea),
+            ("iframe", startTagIFrame),
+            ("noscript", startTagNoscript),
+            (("noembed", "noframes"), startTagRawtext),
+            ("select", startTagSelect),
+            (("rp", "rt"), startTagRpRt),
+            (("option", "optgroup"), startTagOpt),
+            (("math"), startTagMath),
+            (("svg"), startTagSvg),
+            (("caption", "col", "colgroup", "frame", "head",
+              "tbody", "td", "tfoot", "th", "thead",
+              "tr"), startTagMisplaced)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            ("body", endTagBody),
+            ("html", endTagHtml),
+            (("address", "article", "aside", "blockquote", "button", "center",
+              "details", "dialog", "dir", "div", "dl", "fieldset", "figcaption", "figure",
+              "footer", "header", "hgroup", "listing", "main", "menu", "nav", "ol", "pre",
+              "section", "summary", "ul"), endTagBlock),
+            ("form", endTagForm),
+            ("p", endTagP),
+            (("dd", "dt", "li"), endTagListItem),
+            (headingElements, endTagHeading),
+            (("a", "b", "big", "code", "em", "font", "i", "nobr", "s", "small",
+              "strike", "strong", "tt", "u"), endTagFormatting),
+            (("applet", "marquee", "object"), endTagAppletMarqueeObject),
+            ("br", endTagBr),
+        ])
+        endTagHandler.default = endTagOther
+
+    class TextPhase(Phase):
+        __slots__ = tuple()
+
+        def processCharacters(self, token):
+            self.tree.insertText(token["data"])
+
+        def processEOF(self):
+            self.parser.parseError("expected-named-closing-tag-but-got-eof",
+                                   {"name": self.tree.openElements[-1].name})
+            self.tree.openElements.pop()
+            self.parser.phase = self.parser.originalPhase
+            return True
+
+        def startTagOther(self, token):
+            assert False, "Tried to process start tag %s in RCDATA/RAWTEXT mode" % token['name']
+
+        def endTagScript(self, token):
+            node = self.tree.openElements.pop()
+            assert node.name == "script"
+            self.parser.phase = self.parser.originalPhase
+            # The rest of this method is all stuff that only happens if
+            # document.write works
+
+        def endTagOther(self, token):
+            self.tree.openElements.pop()
+            self.parser.phase = self.parser.originalPhase
+
+        startTagHandler = _utils.MethodDispatcher([])
+        startTagHandler.default = startTagOther
+        endTagHandler = _utils.MethodDispatcher([
+            ("script", endTagScript)])
+        endTagHandler.default = endTagOther
+
+    class InTablePhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-table
+        __slots__ = tuple()
+
+        # helper methods
+        def clearStackToTableContext(self):
+            # "clear the stack back to a table context"
+            while self.tree.openElements[-1].name not in ("table", "html"):
+                # self.parser.parseError("unexpected-implied-end-tag-in-table",
+                #  {"name":  self.tree.openElements[-1].name})
+                self.tree.openElements.pop()
+            # When the current node is <html> it's an innerHTML case
+
+        # processing methods
+        def processEOF(self):
+            if self.tree.openElements[-1].name != "html":
+                self.parser.parseError("eof-in-table")
+            else:
+                assert self.parser.innerHTML
+            # Stop parsing
+
+        def processSpaceCharacters(self, token):
+            originalPhase = self.parser.phase
+            self.parser.phase = self.parser.phases["inTableText"]
+            self.parser.phase.originalPhase = originalPhase
+            self.parser.phase.processSpaceCharacters(token)
+
+        def processCharacters(self, token):
+            originalPhase = self.parser.phase
+            self.parser.phase = self.parser.phases["inTableText"]
+            self.parser.phase.originalPhase = originalPhase
+            self.parser.phase.processCharacters(token)
+
+        def insertText(self, token):
+            # If we get here there must be at least one non-whitespace character
+            # Do the table magic!
+            self.tree.insertFromTable = True
+            self.parser.phases["inBody"].processCharacters(token)
+            self.tree.insertFromTable = False
+
+        def startTagCaption(self, token):
+            self.clearStackToTableContext()
+            self.tree.activeFormattingElements.append(Marker)
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inCaption"]
+
+        def startTagColgroup(self, token):
+            self.clearStackToTableContext()
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inColumnGroup"]
+
+        def startTagCol(self, token):
+            self.startTagColgroup(impliedTagToken("colgroup", "StartTag"))
+            return token
+
+        def startTagRowGroup(self, token):
+            self.clearStackToTableContext()
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inTableBody"]
+
+        def startTagImplyTbody(self, token):
+            self.startTagRowGroup(impliedTagToken("tbody", "StartTag"))
+            return token
+
+        def startTagTable(self, token):
+            self.parser.parseError("unexpected-start-tag-implies-end-tag",
+                                   {"startName": "table", "endName": "table"})
+            self.parser.phase.processEndTag(impliedTagToken("table"))
+            if not self.parser.innerHTML:
+                return token
+
+        def startTagStyleScript(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagInput(self, token):
+            if ("type" in token["data"] and
+                    token["data"]["type"].translate(asciiUpper2Lower) == "hidden"):
+                self.parser.parseError("unexpected-hidden-input-in-table")
+                self.tree.insertElement(token)
+                # XXX associate with form
+                self.tree.openElements.pop()
+            else:
+                self.startTagOther(token)
+
+        def startTagForm(self, token):
+            self.parser.parseError("unexpected-form-in-table")
+            if self.tree.formPointer is None:
+                self.tree.insertElement(token)
+                self.tree.formPointer = self.tree.openElements[-1]
+                self.tree.openElements.pop()
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-start-tag-implies-table-voodoo", {"name": token["name"]})
+            # Do the table magic!
+            self.tree.insertFromTable = True
+            self.parser.phases["inBody"].processStartTag(token)
+            self.tree.insertFromTable = False
+
+        def endTagTable(self, token):
+            if self.tree.elementInScope("table", variant="table"):
+                self.tree.generateImpliedEndTags()
+                if self.tree.openElements[-1].name != "table":
+                    self.parser.parseError("end-tag-too-early-named",
+                                           {"gotName": "table",
+                                            "expectedName": self.tree.openElements[-1].name})
+                while self.tree.openElements[-1].name != "table":
+                    self.tree.openElements.pop()
+                self.tree.openElements.pop()
+                self.parser.resetInsertionMode()
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def endTagIgnore(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag-implies-table-voodoo", {"name": token["name"]})
+            # Do the table magic!
+            self.tree.insertFromTable = True
+            self.parser.phases["inBody"].processEndTag(token)
+            self.tree.insertFromTable = False
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", Phase.startTagHtml),
+            ("caption", startTagCaption),
+            ("colgroup", startTagColgroup),
+            ("col", startTagCol),
+            (("tbody", "tfoot", "thead"), startTagRowGroup),
+            (("td", "th", "tr"), startTagImplyTbody),
+            ("table", startTagTable),
+            (("style", "script"), startTagStyleScript),
+            ("input", startTagInput),
+            ("form", startTagForm)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            ("table", endTagTable),
+            (("body", "caption", "col", "colgroup", "html", "tbody", "td",
+              "tfoot", "th", "thead", "tr"), endTagIgnore)
+        ])
+        endTagHandler.default = endTagOther
+
+    class InTableTextPhase(Phase):
+        __slots__ = ("originalPhase", "characterTokens")
+
+        def __init__(self, *args, **kwargs):
+            super(InTableTextPhase, self).__init__(*args, **kwargs)
+            self.originalPhase = None
+            self.characterTokens = []
+
+        def flushCharacters(self):
+            data = "".join([item["data"] for item in self.characterTokens])
+            if any([item not in spaceCharacters for item in data]):
+                token = {"type": tokenTypes["Characters"], "data": data}
+                self.parser.phases["inTable"].insertText(token)
+            elif data:
+                self.tree.insertText(data)
+            self.characterTokens = []
+
+        def processComment(self, token):
+            self.flushCharacters()
+            self.parser.phase = self.originalPhase
+            return token
+
+        def processEOF(self):
+            self.flushCharacters()
+            self.parser.phase = self.originalPhase
+            return True
+
+        def processCharacters(self, token):
+            if token["data"] == "\u0000":
+                return
+            self.characterTokens.append(token)
+
+        def processSpaceCharacters(self, token):
+            # pretty sure we should never reach here
+            self.characterTokens.append(token)
+    #        assert False
+
+        def processStartTag(self, token):
+            self.flushCharacters()
+            self.parser.phase = self.originalPhase
+            return token
+
+        def processEndTag(self, token):
+            self.flushCharacters()
+            self.parser.phase = self.originalPhase
+            return token
+
+    class InCaptionPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-caption
+        __slots__ = tuple()
+
+        def ignoreEndTagCaption(self):
+            return not self.tree.elementInScope("caption", variant="table")
+
+        def processEOF(self):
+            self.parser.phases["inBody"].processEOF()
+
+        def processCharacters(self, token):
+            return self.parser.phases["inBody"].processCharacters(token)
+
+        def startTagTableElement(self, token):
+            self.parser.parseError()
+            # XXX Have to duplicate logic here to find out if the tag is ignored
+            ignoreEndTag = self.ignoreEndTagCaption()
+            self.parser.phase.processEndTag(impliedTagToken("caption"))
+            if not ignoreEndTag:
+                return token
+
+        def startTagOther(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def endTagCaption(self, token):
+            if not self.ignoreEndTagCaption():
+                # AT this code is quite similar to endTagTable in "InTable"
+                self.tree.generateImpliedEndTags()
+                if self.tree.openElements[-1].name != "caption":
+                    self.parser.parseError("expected-one-end-tag-but-got-another",
+                                           {"gotName": "caption",
+                                            "expectedName": self.tree.openElements[-1].name})
+                while self.tree.openElements[-1].name != "caption":
+                    self.tree.openElements.pop()
+                self.tree.openElements.pop()
+                self.tree.clearActiveFormattingElements()
+                self.parser.phase = self.parser.phases["inTable"]
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def endTagTable(self, token):
+            self.parser.parseError()
+            ignoreEndTag = self.ignoreEndTagCaption()
+            self.parser.phase.processEndTag(impliedTagToken("caption"))
+            if not ignoreEndTag:
+                return token
+
+        def endTagIgnore(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def endTagOther(self, token):
+            return self.parser.phases["inBody"].processEndTag(token)
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", Phase.startTagHtml),
+            (("caption", "col", "colgroup", "tbody", "td", "tfoot", "th",
+              "thead", "tr"), startTagTableElement)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            ("caption", endTagCaption),
+            ("table", endTagTable),
+            (("body", "col", "colgroup", "html", "tbody", "td", "tfoot", "th",
+              "thead", "tr"), endTagIgnore)
+        ])
+        endTagHandler.default = endTagOther
+
+    class InColumnGroupPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-column
+        __slots__ = tuple()
+
+        def ignoreEndTagColgroup(self):
+            return self.tree.openElements[-1].name == "html"
+
+        def processEOF(self):
+            if self.tree.openElements[-1].name == "html":
+                assert self.parser.innerHTML
+                return
+            else:
+                ignoreEndTag = self.ignoreEndTagColgroup()
+                self.endTagColgroup(impliedTagToken("colgroup"))
+                if not ignoreEndTag:
+                    return True
+
+        def processCharacters(self, token):
+            ignoreEndTag = self.ignoreEndTagColgroup()
+            self.endTagColgroup(impliedTagToken("colgroup"))
+            if not ignoreEndTag:
+                return token
+
+        def startTagCol(self, token):
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+            token["selfClosingAcknowledged"] = True
+
+        def startTagOther(self, token):
+            ignoreEndTag = self.ignoreEndTagColgroup()
+            self.endTagColgroup(impliedTagToken("colgroup"))
+            if not ignoreEndTag:
+                return token
+
+        def endTagColgroup(self, token):
+            if self.ignoreEndTagColgroup():
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+            else:
+                self.tree.openElements.pop()
+                self.parser.phase = self.parser.phases["inTable"]
+
+        def endTagCol(self, token):
+            self.parser.parseError("no-end-tag", {"name": "col"})
+
+        def endTagOther(self, token):
+            ignoreEndTag = self.ignoreEndTagColgroup()
+            self.endTagColgroup(impliedTagToken("colgroup"))
+            if not ignoreEndTag:
+                return token
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", Phase.startTagHtml),
+            ("col", startTagCol)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            ("colgroup", endTagColgroup),
+            ("col", endTagCol)
+        ])
+        endTagHandler.default = endTagOther
+
+    class InTableBodyPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-table0
+        __slots__ = tuple()
+
+        # helper methods
+        def clearStackToTableBodyContext(self):
+            while self.tree.openElements[-1].name not in ("tbody", "tfoot",
+                                                          "thead", "html"):
+                # self.parser.parseError("unexpected-implied-end-tag-in-table",
+                #  {"name": self.tree.openElements[-1].name})
+                self.tree.openElements.pop()
+            if self.tree.openElements[-1].name == "html":
+                assert self.parser.innerHTML
+
+        # the rest
+        def processEOF(self):
+            self.parser.phases["inTable"].processEOF()
+
+        def processSpaceCharacters(self, token):
+            return self.parser.phases["inTable"].processSpaceCharacters(token)
+
+        def processCharacters(self, token):
+            return self.parser.phases["inTable"].processCharacters(token)
+
+        def startTagTr(self, token):
+            self.clearStackToTableBodyContext()
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inRow"]
+
+        def startTagTableCell(self, token):
+            self.parser.parseError("unexpected-cell-in-table-body",
+                                   {"name": token["name"]})
+            self.startTagTr(impliedTagToken("tr", "StartTag"))
+            return token
+
+        def startTagTableOther(self, token):
+            # XXX AT Any ideas on how to share this with endTagTable?
+            if (self.tree.elementInScope("tbody", variant="table") or
+                self.tree.elementInScope("thead", variant="table") or
+                    self.tree.elementInScope("tfoot", variant="table")):
+                self.clearStackToTableBodyContext()
+                self.endTagTableRowGroup(
+                    impliedTagToken(self.tree.openElements[-1].name))
+                return token
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def startTagOther(self, token):
+            return self.parser.phases["inTable"].processStartTag(token)
+
+        def endTagTableRowGroup(self, token):
+            if self.tree.elementInScope(token["name"], variant="table"):
+                self.clearStackToTableBodyContext()
+                self.tree.openElements.pop()
+                self.parser.phase = self.parser.phases["inTable"]
+            else:
+                self.parser.parseError("unexpected-end-tag-in-table-body",
+                                       {"name": token["name"]})
+
+        def endTagTable(self, token):
+            if (self.tree.elementInScope("tbody", variant="table") or
+                self.tree.elementInScope("thead", variant="table") or
+                    self.tree.elementInScope("tfoot", variant="table")):
+                self.clearStackToTableBodyContext()
+                self.endTagTableRowGroup(
+                    impliedTagToken(self.tree.openElements[-1].name))
+                return token
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def endTagIgnore(self, token):
+            self.parser.parseError("unexpected-end-tag-in-table-body",
+                                   {"name": token["name"]})
+
+        def endTagOther(self, token):
+            return self.parser.phases["inTable"].processEndTag(token)
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", Phase.startTagHtml),
+            ("tr", startTagTr),
+            (("td", "th"), startTagTableCell),
+            (("caption", "col", "colgroup", "tbody", "tfoot", "thead"),
+             startTagTableOther)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            (("tbody", "tfoot", "thead"), endTagTableRowGroup),
+            ("table", endTagTable),
+            (("body", "caption", "col", "colgroup", "html", "td", "th",
+              "tr"), endTagIgnore)
+        ])
+        endTagHandler.default = endTagOther
+
+    class InRowPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-row
+        __slots__ = tuple()
+
+        # helper methods (XXX unify this with other table helper methods)
+        def clearStackToTableRowContext(self):
+            while self.tree.openElements[-1].name not in ("tr", "html"):
+                self.parser.parseError("unexpected-implied-end-tag-in-table-row",
+                                       {"name": self.tree.openElements[-1].name})
+                self.tree.openElements.pop()
+
+        def ignoreEndTagTr(self):
+            return not self.tree.elementInScope("tr", variant="table")
+
+        # the rest
+        def processEOF(self):
+            self.parser.phases["inTable"].processEOF()
+
+        def processSpaceCharacters(self, token):
+            return self.parser.phases["inTable"].processSpaceCharacters(token)
+
+        def processCharacters(self, token):
+            return self.parser.phases["inTable"].processCharacters(token)
+
+        def startTagTableCell(self, token):
+            self.clearStackToTableRowContext()
+            self.tree.insertElement(token)
+            self.parser.phase = self.parser.phases["inCell"]
+            self.tree.activeFormattingElements.append(Marker)
+
+        def startTagTableOther(self, token):
+            ignoreEndTag = self.ignoreEndTagTr()
+            self.endTagTr(impliedTagToken("tr"))
+            # XXX how are we sure it's always ignored in the innerHTML case?
+            if not ignoreEndTag:
+                return token
+
+        def startTagOther(self, token):
+            return self.parser.phases["inTable"].processStartTag(token)
+
+        def endTagTr(self, token):
+            if not self.ignoreEndTagTr():
+                self.clearStackToTableRowContext()
+                self.tree.openElements.pop()
+                self.parser.phase = self.parser.phases["inTableBody"]
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def endTagTable(self, token):
+            ignoreEndTag = self.ignoreEndTagTr()
+            self.endTagTr(impliedTagToken("tr"))
+            # Reprocess the current tag if the tr end tag was not ignored
+            # XXX how are we sure it's always ignored in the innerHTML case?
+            if not ignoreEndTag:
+                return token
+
+        def endTagTableRowGroup(self, token):
+            if self.tree.elementInScope(token["name"], variant="table"):
+                self.endTagTr(impliedTagToken("tr"))
+                return token
+            else:
+                self.parser.parseError()
+
+        def endTagIgnore(self, token):
+            self.parser.parseError("unexpected-end-tag-in-table-row",
+                                   {"name": token["name"]})
+
+        def endTagOther(self, token):
+            return self.parser.phases["inTable"].processEndTag(token)
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", Phase.startTagHtml),
+            (("td", "th"), startTagTableCell),
+            (("caption", "col", "colgroup", "tbody", "tfoot", "thead",
+              "tr"), startTagTableOther)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            ("tr", endTagTr),
+            ("table", endTagTable),
+            (("tbody", "tfoot", "thead"), endTagTableRowGroup),
+            (("body", "caption", "col", "colgroup", "html", "td", "th"),
+             endTagIgnore)
+        ])
+        endTagHandler.default = endTagOther
+
+    class InCellPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-cell
+        __slots__ = tuple()
+
+        # helper
+        def closeCell(self):
+            if self.tree.elementInScope("td", variant="table"):
+                self.endTagTableCell(impliedTagToken("td"))
+            elif self.tree.elementInScope("th", variant="table"):
+                self.endTagTableCell(impliedTagToken("th"))
+
+        # the rest
+        def processEOF(self):
+            self.parser.phases["inBody"].processEOF()
+
+        def processCharacters(self, token):
+            return self.parser.phases["inBody"].processCharacters(token)
+
+        def startTagTableOther(self, token):
+            if (self.tree.elementInScope("td", variant="table") or
+                    self.tree.elementInScope("th", variant="table")):
+                self.closeCell()
+                return token
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def startTagOther(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def endTagTableCell(self, token):
+            if self.tree.elementInScope(token["name"], variant="table"):
+                self.tree.generateImpliedEndTags(token["name"])
+                if self.tree.openElements[-1].name != token["name"]:
+                    self.parser.parseError("unexpected-cell-end-tag",
+                                           {"name": token["name"]})
+                    while True:
+                        node = self.tree.openElements.pop()
+                        if node.name == token["name"]:
+                            break
+                else:
+                    self.tree.openElements.pop()
+                self.tree.clearActiveFormattingElements()
+                self.parser.phase = self.parser.phases["inRow"]
+            else:
+                self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def endTagIgnore(self, token):
+            self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+        def endTagImply(self, token):
+            if self.tree.elementInScope(token["name"], variant="table"):
+                self.closeCell()
+                return token
+            else:
+                # sometimes innerHTML case
+                self.parser.parseError()
+
+        def endTagOther(self, token):
+            return self.parser.phases["inBody"].processEndTag(token)
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", Phase.startTagHtml),
+            (("caption", "col", "colgroup", "tbody", "td", "tfoot", "th",
+              "thead", "tr"), startTagTableOther)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            (("td", "th"), endTagTableCell),
+            (("body", "caption", "col", "colgroup", "html"), endTagIgnore),
+            (("table", "tbody", "tfoot", "thead", "tr"), endTagImply)
+        ])
+        endTagHandler.default = endTagOther
+
+    class InSelectPhase(Phase):
+        __slots__ = tuple()
+
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-select
+        def processEOF(self):
+            if self.tree.openElements[-1].name != "html":
+                self.parser.parseError("eof-in-select")
+            else:
+                assert self.parser.innerHTML
+
+        def processCharacters(self, token):
+            if token["data"] == "\u0000":
+                return
+            self.tree.insertText(token["data"])
+
+        def startTagOption(self, token):
+            # We need to imply </option> if <option> is the current node.
+            if self.tree.openElements[-1].name == "option":
+                self.tree.openElements.pop()
+            self.tree.insertElement(token)
+
+        def startTagOptgroup(self, token):
+            if self.tree.openElements[-1].name == "option":
+                self.tree.openElements.pop()
+            if self.tree.openElements[-1].name == "optgroup":
+                self.tree.openElements.pop()
+            self.tree.insertElement(token)
+
+        def startTagSelect(self, token):
+            self.parser.parseError("unexpected-select-in-select")
+            self.endTagSelect(impliedTagToken("select"))
+
+        def startTagInput(self, token):
+            self.parser.parseError("unexpected-input-in-select")
+            if self.tree.elementInScope("select", variant="select"):
+                self.endTagSelect(impliedTagToken("select"))
+                return token
+            else:
+                assert self.parser.innerHTML
+
+        def startTagScript(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-start-tag-in-select",
+                                   {"name": token["name"]})
+
+        def endTagOption(self, token):
+            if self.tree.openElements[-1].name == "option":
+                self.tree.openElements.pop()
+            else:
+                self.parser.parseError("unexpected-end-tag-in-select",
+                                       {"name": "option"})
+
+        def endTagOptgroup(self, token):
+            # </optgroup> implicitly closes <option>
+            if (self.tree.openElements[-1].name == "option" and
+                    self.tree.openElements[-2].name == "optgroup"):
+                self.tree.openElements.pop()
+            # It also closes </optgroup>
+            if self.tree.openElements[-1].name == "optgroup":
+                self.tree.openElements.pop()
+            # But nothing else
+            else:
+                self.parser.parseError("unexpected-end-tag-in-select",
+                                       {"name": "optgroup"})
+
+        def endTagSelect(self, token):
+            if self.tree.elementInScope("select", variant="select"):
+                node = self.tree.openElements.pop()
+                while node.name != "select":
+                    node = self.tree.openElements.pop()
+                self.parser.resetInsertionMode()
+            else:
+                # innerHTML case
+                assert self.parser.innerHTML
+                self.parser.parseError()
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag-in-select",
+                                   {"name": token["name"]})
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", Phase.startTagHtml),
+            ("option", startTagOption),
+            ("optgroup", startTagOptgroup),
+            ("select", startTagSelect),
+            (("input", "keygen", "textarea"), startTagInput),
+            ("script", startTagScript)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            ("option", endTagOption),
+            ("optgroup", endTagOptgroup),
+            ("select", endTagSelect)
+        ])
+        endTagHandler.default = endTagOther
+
+    class InSelectInTablePhase(Phase):
+        __slots__ = tuple()
+
+        def processEOF(self):
+            self.parser.phases["inSelect"].processEOF()
+
+        def processCharacters(self, token):
+            return self.parser.phases["inSelect"].processCharacters(token)
+
+        def startTagTable(self, token):
+            self.parser.parseError("unexpected-table-element-start-tag-in-select-in-table", {"name": token["name"]})
+            self.endTagOther(impliedTagToken("select"))
+            return token
+
+        def startTagOther(self, token):
+            return self.parser.phases["inSelect"].processStartTag(token)
+
+        def endTagTable(self, token):
+            self.parser.parseError("unexpected-table-element-end-tag-in-select-in-table", {"name": token["name"]})
+            if self.tree.elementInScope(token["name"], variant="table"):
+                self.endTagOther(impliedTagToken("select"))
+                return token
+
+        def endTagOther(self, token):
+            return self.parser.phases["inSelect"].processEndTag(token)
+
+        startTagHandler = _utils.MethodDispatcher([
+            (("caption", "table", "tbody", "tfoot", "thead", "tr", "td", "th"),
+             startTagTable)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            (("caption", "table", "tbody", "tfoot", "thead", "tr", "td", "th"),
+             endTagTable)
+        ])
+        endTagHandler.default = endTagOther
+
+    class InForeignContentPhase(Phase):
+        __slots__ = tuple()
+
+        breakoutElements = frozenset(["b", "big", "blockquote", "body", "br",
+                                      "center", "code", "dd", "div", "dl", "dt",
+                                      "em", "embed", "h1", "h2", "h3",
+                                      "h4", "h5", "h6", "head", "hr", "i", "img",
+                                      "li", "listing", "menu", "meta", "nobr",
+                                      "ol", "p", "pre", "ruby", "s", "small",
+                                      "span", "strong", "strike", "sub", "sup",
+                                      "table", "tt", "u", "ul", "var"])
+
+        def adjustSVGTagNames(self, token):
+            replacements = {"altglyph": "altGlyph",
+                            "altglyphdef": "altGlyphDef",
+                            "altglyphitem": "altGlyphItem",
+                            "animatecolor": "animateColor",
+                            "animatemotion": "animateMotion",
+                            "animatetransform": "animateTransform",
+                            "clippath": "clipPath",
+                            "feblend": "feBlend",
+                            "fecolormatrix": "feColorMatrix",
+                            "fecomponenttransfer": "feComponentTransfer",
+                            "fecomposite": "feComposite",
+                            "feconvolvematrix": "feConvolveMatrix",
+                            "fediffuselighting": "feDiffuseLighting",
+                            "fedisplacementmap": "feDisplacementMap",
+                            "fedistantlight": "feDistantLight",
+                            "feflood": "feFlood",
+                            "fefunca": "feFuncA",
+                            "fefuncb": "feFuncB",
+                            "fefuncg": "feFuncG",
+                            "fefuncr": "feFuncR",
+                            "fegaussianblur": "feGaussianBlur",
+                            "feimage": "feImage",
+                            "femerge": "feMerge",
+                            "femergenode": "feMergeNode",
+                            "femorphology": "feMorphology",
+                            "feoffset": "feOffset",
+                            "fepointlight": "fePointLight",
+                            "fespecularlighting": "feSpecularLighting",
+                            "fespotlight": "feSpotLight",
+                            "fetile": "feTile",
+                            "feturbulence": "feTurbulence",
+                            "foreignobject": "foreignObject",
+                            "glyphref": "glyphRef",
+                            "lineargradient": "linearGradient",
+                            "radialgradient": "radialGradient",
+                            "textpath": "textPath"}
+
+            if token["name"] in replacements:
+                token["name"] = replacements[token["name"]]
+
+        def processCharacters(self, token):
+            if token["data"] == "\u0000":
+                token["data"] = "\uFFFD"
+            elif (self.parser.framesetOK and
+                  any(char not in spaceCharacters for char in token["data"])):
+                self.parser.framesetOK = False
+            Phase.processCharacters(self, token)
+
+        def processStartTag(self, token):
+            currentNode = self.tree.openElements[-1]
+            if (token["name"] in self.breakoutElements or
+                (token["name"] == "font" and
+                 set(token["data"].keys()) & {"color", "face", "size"})):
+                self.parser.parseError("unexpected-html-element-in-foreign-content",
+                                       {"name": token["name"]})
+                while (self.tree.openElements[-1].namespace !=
+                       self.tree.defaultNamespace and
+                       not self.parser.isHTMLIntegrationPoint(self.tree.openElements[-1]) and
+                       not self.parser.isMathMLTextIntegrationPoint(self.tree.openElements[-1])):
+                    self.tree.openElements.pop()
+                return token
+
+            else:
+                if currentNode.namespace == namespaces["mathml"]:
+                    self.parser.adjustMathMLAttributes(token)
+                elif currentNode.namespace == namespaces["svg"]:
+                    self.adjustSVGTagNames(token)
+                    self.parser.adjustSVGAttributes(token)
+                self.parser.adjustForeignAttributes(token)
+                token["namespace"] = currentNode.namespace
+                self.tree.insertElement(token)
+                if token["selfClosing"]:
+                    self.tree.openElements.pop()
+                    token["selfClosingAcknowledged"] = True
+
+        def processEndTag(self, token):
+            nodeIndex = len(self.tree.openElements) - 1
+            node = self.tree.openElements[-1]
+            if node.name.translate(asciiUpper2Lower) != token["name"]:
+                self.parser.parseError("unexpected-end-tag", {"name": token["name"]})
+
+            while True:
+                if node.name.translate(asciiUpper2Lower) == token["name"]:
+                    # XXX this isn't in the spec but it seems necessary
+                    if self.parser.phase == self.parser.phases["inTableText"]:
+                        self.parser.phase.flushCharacters()
+                        self.parser.phase = self.parser.phase.originalPhase
+                    while self.tree.openElements.pop() != node:
+                        assert self.tree.openElements
+                    new_token = None
+                    break
+                nodeIndex -= 1
+
+                node = self.tree.openElements[nodeIndex]
+                if node.namespace != self.tree.defaultNamespace:
+                    continue
+                else:
+                    new_token = self.parser.phase.processEndTag(token)
+                    break
+            return new_token
+
+    class AfterBodyPhase(Phase):
+        __slots__ = tuple()
+
+        def processEOF(self):
+            # Stop parsing
+            pass
+
+        def processComment(self, token):
+            # This is needed because data is to be appended to the <html> element
+            # here and not to whatever is currently open.
+            self.tree.insertComment(token, self.tree.openElements[0])
+
+        def processCharacters(self, token):
+            self.parser.parseError("unexpected-char-after-body")
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-start-tag-after-body",
+                                   {"name": token["name"]})
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+        def endTagHtml(self, name):
+            if self.parser.innerHTML:
+                self.parser.parseError("unexpected-end-tag-after-body-innerhtml")
+            else:
+                self.parser.phase = self.parser.phases["afterAfterBody"]
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag-after-body",
+                                   {"name": token["name"]})
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", startTagHtml)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([("html", endTagHtml)])
+        endTagHandler.default = endTagOther
+
+    class InFramesetPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#in-frameset
+        __slots__ = tuple()
+
+        def processEOF(self):
+            if self.tree.openElements[-1].name != "html":
+                self.parser.parseError("eof-in-frameset")
+            else:
+                assert self.parser.innerHTML
+
+        def processCharacters(self, token):
+            self.parser.parseError("unexpected-char-in-frameset")
+
+        def startTagFrameset(self, token):
+            self.tree.insertElement(token)
+
+        def startTagFrame(self, token):
+            self.tree.insertElement(token)
+            self.tree.openElements.pop()
+
+        def startTagNoframes(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-start-tag-in-frameset",
+                                   {"name": token["name"]})
+
+        def endTagFrameset(self, token):
+            if self.tree.openElements[-1].name == "html":
+                # innerHTML case
+                self.parser.parseError("unexpected-frameset-in-frameset-innerhtml")
+            else:
+                self.tree.openElements.pop()
+            if (not self.parser.innerHTML and
+                    self.tree.openElements[-1].name != "frameset"):
+                # If we're not in innerHTML mode and the current node is not a
+                # "frameset" element (anymore) then switch.
+                self.parser.phase = self.parser.phases["afterFrameset"]
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag-in-frameset",
+                                   {"name": token["name"]})
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", Phase.startTagHtml),
+            ("frameset", startTagFrameset),
+            ("frame", startTagFrame),
+            ("noframes", startTagNoframes)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            ("frameset", endTagFrameset)
+        ])
+        endTagHandler.default = endTagOther
+
+    class AfterFramesetPhase(Phase):
+        # http://www.whatwg.org/specs/web-apps/current-work/#after3
+        __slots__ = tuple()
+
+        def processEOF(self):
+            # Stop parsing
+            pass
+
+        def processCharacters(self, token):
+            self.parser.parseError("unexpected-char-after-frameset")
+
+        def startTagNoframes(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("unexpected-start-tag-after-frameset",
+                                   {"name": token["name"]})
+
+        def endTagHtml(self, token):
+            self.parser.phase = self.parser.phases["afterAfterFrameset"]
+
+        def endTagOther(self, token):
+            self.parser.parseError("unexpected-end-tag-after-frameset",
+                                   {"name": token["name"]})
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", Phase.startTagHtml),
+            ("noframes", startTagNoframes)
+        ])
+        startTagHandler.default = startTagOther
+
+        endTagHandler = _utils.MethodDispatcher([
+            ("html", endTagHtml)
+        ])
+        endTagHandler.default = endTagOther
+
+    class AfterAfterBodyPhase(Phase):
+        __slots__ = tuple()
+
+        def processEOF(self):
+            pass
+
+        def processComment(self, token):
+            self.tree.insertComment(token, self.tree.document)
+
+        def processSpaceCharacters(self, token):
+            return self.parser.phases["inBody"].processSpaceCharacters(token)
+
+        def processCharacters(self, token):
+            self.parser.parseError("expected-eof-but-got-char")
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("expected-eof-but-got-start-tag",
+                                   {"name": token["name"]})
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+        def processEndTag(self, token):
+            self.parser.parseError("expected-eof-but-got-end-tag",
+                                   {"name": token["name"]})
+            self.parser.phase = self.parser.phases["inBody"]
+            return token
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", startTagHtml)
+        ])
+        startTagHandler.default = startTagOther
+
+    class AfterAfterFramesetPhase(Phase):
+        __slots__ = tuple()
+
+        def processEOF(self):
+            pass
+
+        def processComment(self, token):
+            self.tree.insertComment(token, self.tree.document)
+
+        def processSpaceCharacters(self, token):
+            return self.parser.phases["inBody"].processSpaceCharacters(token)
+
+        def processCharacters(self, token):
+            self.parser.parseError("expected-eof-but-got-char")
+
+        def startTagHtml(self, token):
+            return self.parser.phases["inBody"].processStartTag(token)
+
+        def startTagNoFrames(self, token):
+            return self.parser.phases["inHead"].processStartTag(token)
+
+        def startTagOther(self, token):
+            self.parser.parseError("expected-eof-but-got-start-tag",
+                                   {"name": token["name"]})
+
+        def processEndTag(self, token):
+            self.parser.parseError("expected-eof-but-got-end-tag",
+                                   {"name": token["name"]})
+
+        startTagHandler = _utils.MethodDispatcher([
+            ("html", startTagHtml),
+            ("noframes", startTagNoFrames)
+        ])
+        startTagHandler.default = startTagOther
+
+    # pylint:enable=unused-argument
+
+    return {
+        "initial": InitialPhase,
+        "beforeHtml": BeforeHtmlPhase,
+        "beforeHead": BeforeHeadPhase,
+        "inHead": InHeadPhase,
+        "inHeadNoscript": InHeadNoscriptPhase,
+        "afterHead": AfterHeadPhase,
+        "inBody": InBodyPhase,
+        "text": TextPhase,
+        "inTable": InTablePhase,
+        "inTableText": InTableTextPhase,
+        "inCaption": InCaptionPhase,
+        "inColumnGroup": InColumnGroupPhase,
+        "inTableBody": InTableBodyPhase,
+        "inRow": InRowPhase,
+        "inCell": InCellPhase,
+        "inSelect": InSelectPhase,
+        "inSelectInTable": InSelectInTablePhase,
+        "inForeignContent": InForeignContentPhase,
+        "afterBody": AfterBodyPhase,
+        "inFrameset": InFramesetPhase,
+        "afterFrameset": AfterFramesetPhase,
+        "afterAfterBody": AfterAfterBodyPhase,
+        "afterAfterFrameset": AfterAfterFramesetPhase,
+        # XXX after after frameset
+    }
+
+
+def adjust_attributes(token, replacements):
+    needs_adjustment = viewkeys(token['data']) & viewkeys(replacements)
+    if needs_adjustment:
+        token['data'] = type(token['data'])((replacements.get(k, k), v)
+                                            for k, v in token['data'].items())
+
+
+def impliedTagToken(name, type="EndTag", attributes=None,
+                    selfClosing=False):
+    if attributes is None:
+        attributes = {}
+    return {"type": tokenTypes[type], "name": name, "data": attributes,
+            "selfClosing": selfClosing}
+
+
+class ParseError(Exception):
+    """Error in parsed document"""
+    pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/serializer.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/serializer.py
new file mode 100644
index 0000000..d5669d8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/serializer.py
@@ -0,0 +1,409 @@
+from __future__ import absolute_import, division, unicode_literals
+from pip._vendor.six import text_type
+
+import re
+
+from codecs import register_error, xmlcharrefreplace_errors
+
+from .constants import voidElements, booleanAttributes, spaceCharacters
+from .constants import rcdataElements, entities, xmlEntities
+from . import treewalkers, _utils
+from xml.sax.saxutils import escape
+
+_quoteAttributeSpecChars = "".join(spaceCharacters) + "\"'=<>`"
+_quoteAttributeSpec = re.compile("[" + _quoteAttributeSpecChars + "]")
+_quoteAttributeLegacy = re.compile("[" + _quoteAttributeSpecChars +
+                                   "\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n"
+                                   "\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15"
+                                   "\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f"
+                                   "\x20\x2f\x60\xa0\u1680\u180e\u180f\u2000"
+                                   "\u2001\u2002\u2003\u2004\u2005\u2006\u2007"
+                                   "\u2008\u2009\u200a\u2028\u2029\u202f\u205f"
+                                   "\u3000]")
+
+
+_encode_entity_map = {}
+_is_ucs4 = len("\U0010FFFF") == 1
+for k, v in list(entities.items()):
+    # skip multi-character entities
+    if ((_is_ucs4 and len(v) > 1) or
+            (not _is_ucs4 and len(v) > 2)):
+        continue
+    if v != "&":
+        if len(v) == 2:
+            v = _utils.surrogatePairToCodepoint(v)
+        else:
+            v = ord(v)
+        if v not in _encode_entity_map or k.islower():
+            # prefer &lt; over &LT; and similarly for &amp;, &gt;, etc.
+            _encode_entity_map[v] = k
+
+
+def htmlentityreplace_errors(exc):
+    if isinstance(exc, (UnicodeEncodeError, UnicodeTranslateError)):
+        res = []
+        codepoints = []
+        skip = False
+        for i, c in enumerate(exc.object[exc.start:exc.end]):
+            if skip:
+                skip = False
+                continue
+            index = i + exc.start
+            if _utils.isSurrogatePair(exc.object[index:min([exc.end, index + 2])]):
+                codepoint = _utils.surrogatePairToCodepoint(exc.object[index:index + 2])
+                skip = True
+            else:
+                codepoint = ord(c)
+            codepoints.append(codepoint)
+        for cp in codepoints:
+            e = _encode_entity_map.get(cp)
+            if e:
+                res.append("&")
+                res.append(e)
+                if not e.endswith(";"):
+                    res.append(";")
+            else:
+                res.append("&#x%s;" % (hex(cp)[2:]))
+        return ("".join(res), exc.end)
+    else:
+        return xmlcharrefreplace_errors(exc)
+
+
+register_error("htmlentityreplace", htmlentityreplace_errors)
+
+
+def serialize(input, tree="etree", encoding=None, **serializer_opts):
+    """Serializes the input token stream using the specified treewalker
+
+    :arg input: the token stream to serialize
+
+    :arg tree: the treewalker to use
+
+    :arg encoding: the encoding to use
+
+    :arg serializer_opts: any options to pass to the
+        :py:class:`html5lib.serializer.HTMLSerializer` that gets created
+
+    :returns: the tree serialized as a string
+
+    Example:
+
+    >>> from html5lib.html5parser import parse
+    >>> from html5lib.serializer import serialize
+    >>> token_stream = parse('<html><body><p>Hi!</p></body></html>')
+    >>> serialize(token_stream, omit_optional_tags=False)
+    '<html><head></head><body><p>Hi!</p></body></html>'
+
+    """
+    # XXX: Should we cache this?
+    walker = treewalkers.getTreeWalker(tree)
+    s = HTMLSerializer(**serializer_opts)
+    return s.render(walker(input), encoding)
+
+
+class HTMLSerializer(object):
+
+    # attribute quoting options
+    quote_attr_values = "legacy"  # be secure by default
+    quote_char = '"'
+    use_best_quote_char = True
+
+    # tag syntax options
+    omit_optional_tags = True
+    minimize_boolean_attributes = True
+    use_trailing_solidus = False
+    space_before_trailing_solidus = True
+
+    # escaping options
+    escape_lt_in_attrs = False
+    escape_rcdata = False
+    resolve_entities = True
+
+    # miscellaneous options
+    alphabetical_attributes = False
+    inject_meta_charset = True
+    strip_whitespace = False
+    sanitize = False
+
+    options = ("quote_attr_values", "quote_char", "use_best_quote_char",
+               "omit_optional_tags", "minimize_boolean_attributes",
+               "use_trailing_solidus", "space_before_trailing_solidus",
+               "escape_lt_in_attrs", "escape_rcdata", "resolve_entities",
+               "alphabetical_attributes", "inject_meta_charset",
+               "strip_whitespace", "sanitize")
+
+    def __init__(self, **kwargs):
+        """Initialize HTMLSerializer
+
+        :arg inject_meta_charset: Whether or not to inject the meta charset.
+
+            Defaults to ``True``.
+
+        :arg quote_attr_values: Whether to quote attribute values that don't
+            require quoting per legacy browser behavior (``"legacy"``), when
+            required by the standard (``"spec"``), or always (``"always"``).
+
+            Defaults to ``"legacy"``.
+
+        :arg quote_char: Use given quote character for attribute quoting.
+
+            Defaults to ``"`` which will use double quotes unless attribute
+            value contains a double quote, in which case single quotes are
+            used.
+
+        :arg escape_lt_in_attrs: Whether or not to escape ``<`` in attribute
+            values.
+
+            Defaults to ``False``.
+
+        :arg escape_rcdata: Whether to escape characters that need to be
+            escaped within normal elements within rcdata elements such as
+            style.
+
+            Defaults to ``False``.
+
+        :arg resolve_entities: Whether to resolve named character entities that
+            appear in the source tree. The XML predefined entities &lt; &gt;
+            &amp; &quot; &apos; are unaffected by this setting.
+
+            Defaults to ``True``.
+
+        :arg strip_whitespace: Whether to remove semantically meaningless
+            whitespace. (This compresses all whitespace to a single space
+            except within ``pre``.)
+
+            Defaults to ``False``.
+
+        :arg minimize_boolean_attributes: Shortens boolean attributes to give
+            just the attribute value, for example::
+
+              <input disabled="disabled">
+
+            becomes::
+
+              <input disabled>
+
+            Defaults to ``True``.
+
+        :arg use_trailing_solidus: Includes a close-tag slash at the end of the
+            start tag of void elements (empty elements whose end tag is
+            forbidden). E.g. ``<hr/>``.
+
+            Defaults to ``False``.
+
+        :arg space_before_trailing_solidus: Places a space immediately before
+            the closing slash in a tag using a trailing solidus. E.g.
+            ``<hr />``. Requires ``use_trailing_solidus=True``.
+
+            Defaults to ``True``.
+
+        :arg sanitize: Strip all unsafe or unknown constructs from output.
+            See :py:class:`html5lib.filters.sanitizer.Filter`.
+
+            Defaults to ``False``.
+
+        :arg omit_optional_tags: Omit start/end tags that are optional.
+
+            Defaults to ``True``.
+
+        :arg alphabetical_attributes: Reorder attributes to be in alphabetical order.
+
+            Defaults to ``False``.
+
+        """
+        unexpected_args = frozenset(kwargs) - frozenset(self.options)
+        if len(unexpected_args) > 0:
+            raise TypeError("__init__() got an unexpected keyword argument '%s'" % next(iter(unexpected_args)))
+        if 'quote_char' in kwargs:
+            self.use_best_quote_char = False
+        for attr in self.options:
+            setattr(self, attr, kwargs.get(attr, getattr(self, attr)))
+        self.errors = []
+        self.strict = False
+
+    def encode(self, string):
+        assert(isinstance(string, text_type))
+        if self.encoding:
+            return string.encode(self.encoding, "htmlentityreplace")
+        else:
+            return string
+
+    def encodeStrict(self, string):
+        assert(isinstance(string, text_type))
+        if self.encoding:
+            return string.encode(self.encoding, "strict")
+        else:
+            return string
+
+    def serialize(self, treewalker, encoding=None):
+        # pylint:disable=too-many-nested-blocks
+        self.encoding = encoding
+        in_cdata = False
+        self.errors = []
+
+        if encoding and self.inject_meta_charset:
+            from .filters.inject_meta_charset import Filter
+            treewalker = Filter(treewalker, encoding)
+        # Alphabetical attributes is here under the assumption that none of
+        # the later filters add or change order of attributes; it needs to be
+        # before the sanitizer so escaped elements come out correctly
+        if self.alphabetical_attributes:
+            from .filters.alphabeticalattributes import Filter
+            treewalker = Filter(treewalker)
+        # WhitespaceFilter should be used before OptionalTagFilter
+        # for maximum efficiently of this latter filter
+        if self.strip_whitespace:
+            from .filters.whitespace import Filter
+            treewalker = Filter(treewalker)
+        if self.sanitize:
+            from .filters.sanitizer import Filter
+            treewalker = Filter(treewalker)
+        if self.omit_optional_tags:
+            from .filters.optionaltags import Filter
+            treewalker = Filter(treewalker)
+
+        for token in treewalker:
+            type = token["type"]
+            if type == "Doctype":
+                doctype = "<!DOCTYPE %s" % token["name"]
+
+                if token["publicId"]:
+                    doctype += ' PUBLIC "%s"' % token["publicId"]
+                elif token["systemId"]:
+                    doctype += " SYSTEM"
+                if token["systemId"]:
+                    if token["systemId"].find('"') >= 0:
+                        if token["systemId"].find("'") >= 0:
+                            self.serializeError("System identifier contains both single and double quote characters")
+                        quote_char = "'"
+                    else:
+                        quote_char = '"'
+                    doctype += " %s%s%s" % (quote_char, token["systemId"], quote_char)
+
+                doctype += ">"
+                yield self.encodeStrict(doctype)
+
+            elif type in ("Characters", "SpaceCharacters"):
+                if type == "SpaceCharacters" or in_cdata:
+                    if in_cdata and token["data"].find("</") >= 0:
+                        self.serializeError("Unexpected </ in CDATA")
+                    yield self.encode(token["data"])
+                else:
+                    yield self.encode(escape(token["data"]))
+
+            elif type in ("StartTag", "EmptyTag"):
+                name = token["name"]
+                yield self.encodeStrict("<%s" % name)
+                if name in rcdataElements and not self.escape_rcdata:
+                    in_cdata = True
+                elif in_cdata:
+                    self.serializeError("Unexpected child element of a CDATA element")
+                for (_, attr_name), attr_value in token["data"].items():
+                    # TODO: Add namespace support here
+                    k = attr_name
+                    v = attr_value
+                    yield self.encodeStrict(' ')
+
+                    yield self.encodeStrict(k)
+                    if not self.minimize_boolean_attributes or \
+                        (k not in booleanAttributes.get(name, tuple()) and
+                         k not in booleanAttributes.get("", tuple())):
+                        yield self.encodeStrict("=")
+                        if self.quote_attr_values == "always" or len(v) == 0:
+                            quote_attr = True
+                        elif self.quote_attr_values == "spec":
+                            quote_attr = _quoteAttributeSpec.search(v) is not None
+                        elif self.quote_attr_values == "legacy":
+                            quote_attr = _quoteAttributeLegacy.search(v) is not None
+                        else:
+                            raise ValueError("quote_attr_values must be one of: "
+                                             "'always', 'spec', or 'legacy'")
+                        v = v.replace("&", "&amp;")
+                        if self.escape_lt_in_attrs:
+                            v = v.replace("<", "&lt;")
+                        if quote_attr:
+                            quote_char = self.quote_char
+                            if self.use_best_quote_char:
+                                if "'" in v and '"' not in v:
+                                    quote_char = '"'
+                                elif '"' in v and "'" not in v:
+                                    quote_char = "'"
+                            if quote_char == "'":
+                                v = v.replace("'", "&#39;")
+                            else:
+                                v = v.replace('"', "&quot;")
+                            yield self.encodeStrict(quote_char)
+                            yield self.encode(v)
+                            yield self.encodeStrict(quote_char)
+                        else:
+                            yield self.encode(v)
+                if name in voidElements and self.use_trailing_solidus:
+                    if self.space_before_trailing_solidus:
+                        yield self.encodeStrict(" /")
+                    else:
+                        yield self.encodeStrict("/")
+                yield self.encode(">")
+
+            elif type == "EndTag":
+                name = token["name"]
+                if name in rcdataElements:
+                    in_cdata = False
+                elif in_cdata:
+                    self.serializeError("Unexpected child element of a CDATA element")
+                yield self.encodeStrict("</%s>" % name)
+
+            elif type == "Comment":
+                data = token["data"]
+                if data.find("--") >= 0:
+                    self.serializeError("Comment contains --")
+                yield self.encodeStrict("<!--%s-->" % token["data"])
+
+            elif type == "Entity":
+                name = token["name"]
+                key = name + ";"
+                if key not in entities:
+                    self.serializeError("Entity %s not recognized" % name)
+                if self.resolve_entities and key not in xmlEntities:
+                    data = entities[key]
+                else:
+                    data = "&%s;" % name
+                yield self.encodeStrict(data)
+
+            else:
+                self.serializeError(token["data"])
+
+    def render(self, treewalker, encoding=None):
+        """Serializes the stream from the treewalker into a string
+
+        :arg treewalker: the treewalker to serialize
+
+        :arg encoding: the string encoding to use
+
+        :returns: the serialized tree
+
+        Example:
+
+        >>> from html5lib import parse, getTreeWalker
+        >>> from html5lib.serializer import HTMLSerializer
+        >>> token_stream = parse('<html><body>Hi!</body></html>')
+        >>> walker = getTreeWalker('etree')
+        >>> serializer = HTMLSerializer(omit_optional_tags=False)
+        >>> serializer.render(walker(token_stream))
+        '<html><head></head><body>Hi!</body></html>'
+
+        """
+        if encoding:
+            return b"".join(list(self.serialize(treewalker, encoding)))
+        else:
+            return "".join(list(self.serialize(treewalker)))
+
+    def serializeError(self, data="XXX ERROR MESSAGE NEEDED"):
+        # XXX The idea is to make data mandatory.
+        self.errors.append(data)
+        if self.strict:
+            raise SerializeError
+
+
+class SerializeError(Exception):
+    """Error in serialized tree"""
+    pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/__init__.py
new file mode 100644
index 0000000..7ef5959
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/__init__.py
@@ -0,0 +1,30 @@
+"""Tree adapters let you convert from one tree structure to another
+
+Example:
+
+.. code-block:: python
+
+   from pip._vendor import html5lib
+   from pip._vendor.html5lib.treeadapters import genshi
+
+   doc = '<html><body>Hi!</body></html>'
+   treebuilder = html5lib.getTreeBuilder('etree')
+   parser = html5lib.HTMLParser(tree=treebuilder)
+   tree = parser.parse(doc)
+   TreeWalker = html5lib.getTreeWalker('etree')
+
+   genshi_tree = genshi.to_genshi(TreeWalker(tree))
+
+"""
+from __future__ import absolute_import, division, unicode_literals
+
+from . import sax
+
+__all__ = ["sax"]
+
+try:
+    from . import genshi  # noqa
+except ImportError:
+    pass
+else:
+    __all__.append("genshi")
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/sax.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/__pycache__/sax.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/genshi.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/genshi.py
new file mode 100644
index 0000000..61d5fb6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/genshi.py
@@ -0,0 +1,54 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from genshi.core import QName, Attrs
+from genshi.core import START, END, TEXT, COMMENT, DOCTYPE
+
+
+def to_genshi(walker):
+    """Convert a tree to a genshi tree
+
+    :arg walker: the treewalker to use to walk the tree to convert it
+
+    :returns: generator of genshi nodes
+
+    """
+    text = []
+    for token in walker:
+        type = token["type"]
+        if type in ("Characters", "SpaceCharacters"):
+            text.append(token["data"])
+        elif text:
+            yield TEXT, "".join(text), (None, -1, -1)
+            text = []
+
+        if type in ("StartTag", "EmptyTag"):
+            if token["namespace"]:
+                name = "{%s}%s" % (token["namespace"], token["name"])
+            else:
+                name = token["name"]
+            attrs = Attrs([(QName("{%s}%s" % attr if attr[0] is not None else attr[1]), value)
+                           for attr, value in token["data"].items()])
+            yield (START, (QName(name), attrs), (None, -1, -1))
+            if type == "EmptyTag":
+                type = "EndTag"
+
+        if type == "EndTag":
+            if token["namespace"]:
+                name = "{%s}%s" % (token["namespace"], token["name"])
+            else:
+                name = token["name"]
+
+            yield END, QName(name), (None, -1, -1)
+
+        elif type == "Comment":
+            yield COMMENT, token["data"], (None, -1, -1)
+
+        elif type == "Doctype":
+            yield DOCTYPE, (token["name"], token["publicId"],
+                            token["systemId"]), (None, -1, -1)
+
+        else:
+            pass  # FIXME: What to do?
+
+    if text:
+        yield TEXT, "".join(text), (None, -1, -1)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/sax.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/sax.py
new file mode 100644
index 0000000..f4ccea5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treeadapters/sax.py
@@ -0,0 +1,50 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from xml.sax.xmlreader import AttributesNSImpl
+
+from ..constants import adjustForeignAttributes, unadjustForeignAttributes
+
+prefix_mapping = {}
+for prefix, localName, namespace in adjustForeignAttributes.values():
+    if prefix is not None:
+        prefix_mapping[prefix] = namespace
+
+
+def to_sax(walker, handler):
+    """Call SAX-like content handler based on treewalker walker
+
+    :arg walker: the treewalker to use to walk the tree to convert it
+
+    :arg handler: SAX handler to use
+
+    """
+    handler.startDocument()
+    for prefix, namespace in prefix_mapping.items():
+        handler.startPrefixMapping(prefix, namespace)
+
+    for token in walker:
+        type = token["type"]
+        if type == "Doctype":
+            continue
+        elif type in ("StartTag", "EmptyTag"):
+            attrs = AttributesNSImpl(token["data"],
+                                     unadjustForeignAttributes)
+            handler.startElementNS((token["namespace"], token["name"]),
+                                   token["name"],
+                                   attrs)
+            if type == "EmptyTag":
+                handler.endElementNS((token["namespace"], token["name"]),
+                                     token["name"])
+        elif type == "EndTag":
+            handler.endElementNS((token["namespace"], token["name"]),
+                                 token["name"])
+        elif type in ("Characters", "SpaceCharacters"):
+            handler.characters(token["data"])
+        elif type == "Comment":
+            pass
+        else:
+            assert False, "Unknown token type"
+
+    for prefix, namespace in prefix_mapping.items():
+        handler.endPrefixMapping(prefix)
+    handler.endDocument()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/__init__.py
new file mode 100644
index 0000000..d44447e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/__init__.py
@@ -0,0 +1,88 @@
+"""A collection of modules for building different kinds of trees from HTML
+documents.
+
+To create a treebuilder for a new type of tree, you need to do
+implement several things:
+
+1. A set of classes for various types of elements: Document, Doctype, Comment,
+   Element. These must implement the interface of ``base.treebuilders.Node``
+   (although comment nodes have a different signature for their constructor,
+   see ``treebuilders.etree.Comment``) Textual content may also be implemented
+   as another node type, or not, as your tree implementation requires.
+
+2. A treebuilder object (called ``TreeBuilder`` by convention) that inherits
+   from ``treebuilders.base.TreeBuilder``. This has 4 required attributes:
+
+   * ``documentClass`` - the class to use for the bottommost node of a document
+   * ``elementClass`` - the class to use for HTML Elements
+   * ``commentClass`` - the class to use for comments
+   * ``doctypeClass`` - the class to use for doctypes
+
+   It also has one required method:
+
+   * ``getDocument`` - Returns the root node of the complete document tree
+
+3. If you wish to run the unit tests, you must also create a ``testSerializer``
+   method on your treebuilder which accepts a node and returns a string
+   containing Node and its children serialized according to the format used in
+   the unittests
+
+"""
+
+from __future__ import absolute_import, division, unicode_literals
+
+from .._utils import default_etree
+
+treeBuilderCache = {}
+
+
+def getTreeBuilder(treeType, implementation=None, **kwargs):
+    """Get a TreeBuilder class for various types of trees with built-in support
+
+    :arg treeType: the name of the tree type required (case-insensitive). Supported
+        values are:
+
+        * "dom" - A generic builder for DOM implementations, defaulting to a
+          xml.dom.minidom based implementation.
+        * "etree" - A generic builder for tree implementations exposing an
+          ElementTree-like interface, defaulting to xml.etree.cElementTree if
+          available and xml.etree.ElementTree if not.
+        * "lxml" - A etree-based builder for lxml.etree, handling limitations
+          of lxml's implementation.
+
+    :arg implementation: (Currently applies to the "etree" and "dom" tree
+        types). A module implementing the tree type e.g. xml.etree.ElementTree
+        or xml.etree.cElementTree.
+
+    :arg kwargs: Any additional options to pass to the TreeBuilder when
+        creating it.
+
+    Example:
+
+    >>> from html5lib.treebuilders import getTreeBuilder
+    >>> builder = getTreeBuilder('etree')
+
+    """
+
+    treeType = treeType.lower()
+    if treeType not in treeBuilderCache:
+        if treeType == "dom":
+            from . import dom
+            # Come up with a sane default (pref. from the stdlib)
+            if implementation is None:
+                from xml.dom import minidom
+                implementation = minidom
+            # NEVER cache here, caching is done in the dom submodule
+            return dom.getDomModule(implementation, **kwargs).TreeBuilder
+        elif treeType == "lxml":
+            from . import etree_lxml
+            treeBuilderCache[treeType] = etree_lxml.TreeBuilder
+        elif treeType == "etree":
+            from . import etree
+            if implementation is None:
+                implementation = default_etree
+            # NEVER cache here, caching is done in the etree submodule
+            return etree.getETreeModule(implementation, **kwargs).TreeBuilder
+        else:
+            raise ValueError("""Unrecognised treebuilder "%s" """ % treeType)
+    return treeBuilderCache.get(treeType)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/base.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/base.py
new file mode 100644
index 0000000..965fce2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/base.py
@@ -0,0 +1,417 @@
+from __future__ import absolute_import, division, unicode_literals
+from pip._vendor.six import text_type
+
+from ..constants import scopingElements, tableInsertModeElements, namespaces
+
+# The scope markers are inserted when entering object elements,
+# marquees, table cells, and table captions, and are used to prevent formatting
+# from "leaking" into tables, object elements, and marquees.
+Marker = None
+
+listElementsMap = {
+    None: (frozenset(scopingElements), False),
+    "button": (frozenset(scopingElements | {(namespaces["html"], "button")}), False),
+    "list": (frozenset(scopingElements | {(namespaces["html"], "ol"),
+                                          (namespaces["html"], "ul")}), False),
+    "table": (frozenset([(namespaces["html"], "html"),
+                         (namespaces["html"], "table")]), False),
+    "select": (frozenset([(namespaces["html"], "optgroup"),
+                          (namespaces["html"], "option")]), True)
+}
+
+
+class Node(object):
+    """Represents an item in the tree"""
+    def __init__(self, name):
+        """Creates a Node
+
+        :arg name: The tag name associated with the node
+
+        """
+        # The tag name associated with the node
+        self.name = name
+        # The parent of the current node (or None for the document node)
+        self.parent = None
+        # The value of the current node (applies to text nodes and comments)
+        self.value = None
+        # A dict holding name -> value pairs for attributes of the node
+        self.attributes = {}
+        # A list of child nodes of the current node. This must include all
+        # elements but not necessarily other node types.
+        self.childNodes = []
+        # A list of miscellaneous flags that can be set on the node.
+        self._flags = []
+
+    def __str__(self):
+        attributesStr = " ".join(["%s=\"%s\"" % (name, value)
+                                  for name, value in
+                                  self.attributes.items()])
+        if attributesStr:
+            return "<%s %s>" % (self.name, attributesStr)
+        else:
+            return "<%s>" % (self.name)
+
+    def __repr__(self):
+        return "<%s>" % (self.name)
+
+    def appendChild(self, node):
+        """Insert node as a child of the current node
+
+        :arg node: the node to insert
+
+        """
+        raise NotImplementedError
+
+    def insertText(self, data, insertBefore=None):
+        """Insert data as text in the current node, positioned before the
+        start of node insertBefore or to the end of the node's text.
+
+        :arg data: the data to insert
+
+        :arg insertBefore: True if you want to insert the text before the node
+            and False if you want to insert it after the node
+
+        """
+        raise NotImplementedError
+
+    def insertBefore(self, node, refNode):
+        """Insert node as a child of the current node, before refNode in the
+        list of child nodes. Raises ValueError if refNode is not a child of
+        the current node
+
+        :arg node: the node to insert
+
+        :arg refNode: the child node to insert the node before
+
+        """
+        raise NotImplementedError
+
+    def removeChild(self, node):
+        """Remove node from the children of the current node
+
+        :arg node: the child node to remove
+
+        """
+        raise NotImplementedError
+
+    def reparentChildren(self, newParent):
+        """Move all the children of the current node to newParent.
+        This is needed so that trees that don't store text as nodes move the
+        text in the correct way
+
+        :arg newParent: the node to move all this node's children to
+
+        """
+        # XXX - should this method be made more general?
+        for child in self.childNodes:
+            newParent.appendChild(child)
+        self.childNodes = []
+
+    def cloneNode(self):
+        """Return a shallow copy of the current node i.e. a node with the same
+        name and attributes but with no parent or child nodes
+        """
+        raise NotImplementedError
+
+    def hasContent(self):
+        """Return true if the node has children or text, false otherwise
+        """
+        raise NotImplementedError
+
+
+class ActiveFormattingElements(list):
+    def append(self, node):
+        equalCount = 0
+        if node != Marker:
+            for element in self[::-1]:
+                if element == Marker:
+                    break
+                if self.nodesEqual(element, node):
+                    equalCount += 1
+                if equalCount == 3:
+                    self.remove(element)
+                    break
+        list.append(self, node)
+
+    def nodesEqual(self, node1, node2):
+        if not node1.nameTuple == node2.nameTuple:
+            return False
+
+        if not node1.attributes == node2.attributes:
+            return False
+
+        return True
+
+
+class TreeBuilder(object):
+    """Base treebuilder implementation
+
+    * documentClass - the class to use for the bottommost node of a document
+    * elementClass - the class to use for HTML Elements
+    * commentClass - the class to use for comments
+    * doctypeClass - the class to use for doctypes
+
+    """
+    # pylint:disable=not-callable
+
+    # Document class
+    documentClass = None
+
+    # The class to use for creating a node
+    elementClass = None
+
+    # The class to use for creating comments
+    commentClass = None
+
+    # The class to use for creating doctypes
+    doctypeClass = None
+
+    # Fragment class
+    fragmentClass = None
+
+    def __init__(self, namespaceHTMLElements):
+        """Create a TreeBuilder
+
+        :arg namespaceHTMLElements: whether or not to namespace HTML elements
+
+        """
+        if namespaceHTMLElements:
+            self.defaultNamespace = "http://www.w3.org/1999/xhtml"
+        else:
+            self.defaultNamespace = None
+        self.reset()
+
+    def reset(self):
+        self.openElements = []
+        self.activeFormattingElements = ActiveFormattingElements()
+
+        # XXX - rename these to headElement, formElement
+        self.headPointer = None
+        self.formPointer = None
+
+        self.insertFromTable = False
+
+        self.document = self.documentClass()
+
+    def elementInScope(self, target, variant=None):
+
+        # If we pass a node in we match that. if we pass a string
+        # match any node with that name
+        exactNode = hasattr(target, "nameTuple")
+        if not exactNode:
+            if isinstance(target, text_type):
+                target = (namespaces["html"], target)
+            assert isinstance(target, tuple)
+
+        listElements, invert = listElementsMap[variant]
+
+        for node in reversed(self.openElements):
+            if exactNode and node == target:
+                return True
+            elif not exactNode and node.nameTuple == target:
+                return True
+            elif (invert ^ (node.nameTuple in listElements)):
+                return False
+
+        assert False  # We should never reach this point
+
+    def reconstructActiveFormattingElements(self):
+        # Within this algorithm the order of steps described in the
+        # specification is not quite the same as the order of steps in the
+        # code. It should still do the same though.
+
+        # Step 1: stop the algorithm when there's nothing to do.
+        if not self.activeFormattingElements:
+            return
+
+        # Step 2 and step 3: we start with the last element. So i is -1.
+        i = len(self.activeFormattingElements) - 1
+        entry = self.activeFormattingElements[i]
+        if entry == Marker or entry in self.openElements:
+            return
+
+        # Step 6
+        while entry != Marker and entry not in self.openElements:
+            if i == 0:
+                # This will be reset to 0 below
+                i = -1
+                break
+            i -= 1
+            # Step 5: let entry be one earlier in the list.
+            entry = self.activeFormattingElements[i]
+
+        while True:
+            # Step 7
+            i += 1
+
+            # Step 8
+            entry = self.activeFormattingElements[i]
+            clone = entry.cloneNode()  # Mainly to get a new copy of the attributes
+
+            # Step 9
+            element = self.insertElement({"type": "StartTag",
+                                          "name": clone.name,
+                                          "namespace": clone.namespace,
+                                          "data": clone.attributes})
+
+            # Step 10
+            self.activeFormattingElements[i] = element
+
+            # Step 11
+            if element == self.activeFormattingElements[-1]:
+                break
+
+    def clearActiveFormattingElements(self):
+        entry = self.activeFormattingElements.pop()
+        while self.activeFormattingElements and entry != Marker:
+            entry = self.activeFormattingElements.pop()
+
+    def elementInActiveFormattingElements(self, name):
+        """Check if an element exists between the end of the active
+        formatting elements and the last marker. If it does, return it, else
+        return false"""
+
+        for item in self.activeFormattingElements[::-1]:
+            # Check for Marker first because if it's a Marker it doesn't have a
+            # name attribute.
+            if item == Marker:
+                break
+            elif item.name == name:
+                return item
+        return False
+
+    def insertRoot(self, token):
+        element = self.createElement(token)
+        self.openElements.append(element)
+        self.document.appendChild(element)
+
+    def insertDoctype(self, token):
+        name = token["name"]
+        publicId = token["publicId"]
+        systemId = token["systemId"]
+
+        doctype = self.doctypeClass(name, publicId, systemId)
+        self.document.appendChild(doctype)
+
+    def insertComment(self, token, parent=None):
+        if parent is None:
+            parent = self.openElements[-1]
+        parent.appendChild(self.commentClass(token["data"]))
+
+    def createElement(self, token):
+        """Create an element but don't insert it anywhere"""
+        name = token["name"]
+        namespace = token.get("namespace", self.defaultNamespace)
+        element = self.elementClass(name, namespace)
+        element.attributes = token["data"]
+        return element
+
+    def _getInsertFromTable(self):
+        return self._insertFromTable
+
+    def _setInsertFromTable(self, value):
+        """Switch the function used to insert an element from the
+        normal one to the misnested table one and back again"""
+        self._insertFromTable = value
+        if value:
+            self.insertElement = self.insertElementTable
+        else:
+            self.insertElement = self.insertElementNormal
+
+    insertFromTable = property(_getInsertFromTable, _setInsertFromTable)
+
+    def insertElementNormal(self, token):
+        name = token["name"]
+        assert isinstance(name, text_type), "Element %s not unicode" % name
+        namespace = token.get("namespace", self.defaultNamespace)
+        element = self.elementClass(name, namespace)
+        element.attributes = token["data"]
+        self.openElements[-1].appendChild(element)
+        self.openElements.append(element)
+        return element
+
+    def insertElementTable(self, token):
+        """Create an element and insert it into the tree"""
+        element = self.createElement(token)
+        if self.openElements[-1].name not in tableInsertModeElements:
+            return self.insertElementNormal(token)
+        else:
+            # We should be in the InTable mode. This means we want to do
+            # special magic element rearranging
+            parent, insertBefore = self.getTableMisnestedNodePosition()
+            if insertBefore is None:
+                parent.appendChild(element)
+            else:
+                parent.insertBefore(element, insertBefore)
+            self.openElements.append(element)
+        return element
+
+    def insertText(self, data, parent=None):
+        """Insert text data."""
+        if parent is None:
+            parent = self.openElements[-1]
+
+        if (not self.insertFromTable or (self.insertFromTable and
+                                         self.openElements[-1].name
+                                         not in tableInsertModeElements)):
+            parent.insertText(data)
+        else:
+            # We should be in the InTable mode. This means we want to do
+            # special magic element rearranging
+            parent, insertBefore = self.getTableMisnestedNodePosition()
+            parent.insertText(data, insertBefore)
+
+    def getTableMisnestedNodePosition(self):
+        """Get the foster parent element, and sibling to insert before
+        (or None) when inserting a misnested table node"""
+        # The foster parent element is the one which comes before the most
+        # recently opened table element
+        # XXX - this is really inelegant
+        lastTable = None
+        fosterParent = None
+        insertBefore = None
+        for elm in self.openElements[::-1]:
+            if elm.name == "table":
+                lastTable = elm
+                break
+        if lastTable:
+            # XXX - we should really check that this parent is actually a
+            # node here
+            if lastTable.parent:
+                fosterParent = lastTable.parent
+                insertBefore = lastTable
+            else:
+                fosterParent = self.openElements[
+                    self.openElements.index(lastTable) - 1]
+        else:
+            fosterParent = self.openElements[0]
+        return fosterParent, insertBefore
+
+    def generateImpliedEndTags(self, exclude=None):
+        name = self.openElements[-1].name
+        # XXX td, th and tr are not actually needed
+        if (name in frozenset(("dd", "dt", "li", "option", "optgroup", "p", "rp", "rt")) and
+                name != exclude):
+            self.openElements.pop()
+            # XXX This is not entirely what the specification says. We should
+            # investigate it more closely.
+            self.generateImpliedEndTags(exclude)
+
+    def getDocument(self):
+        """Return the final tree"""
+        return self.document
+
+    def getFragment(self):
+        """Return the final fragment"""
+        # assert self.innerHTML
+        fragment = self.fragmentClass()
+        self.openElements[0].reparentChildren(fragment)
+        return fragment
+
+    def testSerializer(self, node):
+        """Serialize the subtree of node in the format required by unit tests
+
+        :arg node: the node from which to start serializing
+
+        """
+        raise NotImplementedError
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/dom.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/dom.py
new file mode 100644
index 0000000..d8b5300
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/dom.py
@@ -0,0 +1,239 @@
+from __future__ import absolute_import, division, unicode_literals
+
+
+try:
+    from collections.abc import MutableMapping
+except ImportError:  # Python 2.7
+    from collections import MutableMapping
+from xml.dom import minidom, Node
+import weakref
+
+from . import base
+from .. import constants
+from ..constants import namespaces
+from .._utils import moduleFactoryFactory
+
+
+def getDomBuilder(DomImplementation):
+    Dom = DomImplementation
+
+    class AttrList(MutableMapping):
+        def __init__(self, element):
+            self.element = element
+
+        def __iter__(self):
+            return iter(self.element.attributes.keys())
+
+        def __setitem__(self, name, value):
+            if isinstance(name, tuple):
+                raise NotImplementedError
+            else:
+                attr = self.element.ownerDocument.createAttribute(name)
+                attr.value = value
+                self.element.attributes[name] = attr
+
+        def __len__(self):
+            return len(self.element.attributes)
+
+        def items(self):
+            return list(self.element.attributes.items())
+
+        def values(self):
+            return list(self.element.attributes.values())
+
+        def __getitem__(self, name):
+            if isinstance(name, tuple):
+                raise NotImplementedError
+            else:
+                return self.element.attributes[name].value
+
+        def __delitem__(self, name):
+            if isinstance(name, tuple):
+                raise NotImplementedError
+            else:
+                del self.element.attributes[name]
+
+    class NodeBuilder(base.Node):
+        def __init__(self, element):
+            base.Node.__init__(self, element.nodeName)
+            self.element = element
+
+        namespace = property(lambda self: hasattr(self.element, "namespaceURI") and
+                             self.element.namespaceURI or None)
+
+        def appendChild(self, node):
+            node.parent = self
+            self.element.appendChild(node.element)
+
+        def insertText(self, data, insertBefore=None):
+            text = self.element.ownerDocument.createTextNode(data)
+            if insertBefore:
+                self.element.insertBefore(text, insertBefore.element)
+            else:
+                self.element.appendChild(text)
+
+        def insertBefore(self, node, refNode):
+            self.element.insertBefore(node.element, refNode.element)
+            node.parent = self
+
+        def removeChild(self, node):
+            if node.element.parentNode == self.element:
+                self.element.removeChild(node.element)
+            node.parent = None
+
+        def reparentChildren(self, newParent):
+            while self.element.hasChildNodes():
+                child = self.element.firstChild
+                self.element.removeChild(child)
+                newParent.element.appendChild(child)
+            self.childNodes = []
+
+        def getAttributes(self):
+            return AttrList(self.element)
+
+        def setAttributes(self, attributes):
+            if attributes:
+                for name, value in list(attributes.items()):
+                    if isinstance(name, tuple):
+                        if name[0] is not None:
+                            qualifiedName = (name[0] + ":" + name[1])
+                        else:
+                            qualifiedName = name[1]
+                        self.element.setAttributeNS(name[2], qualifiedName,
+                                                    value)
+                    else:
+                        self.element.setAttribute(
+                            name, value)
+        attributes = property(getAttributes, setAttributes)
+
+        def cloneNode(self):
+            return NodeBuilder(self.element.cloneNode(False))
+
+        def hasContent(self):
+            return self.element.hasChildNodes()
+
+        def getNameTuple(self):
+            if self.namespace is None:
+                return namespaces["html"], self.name
+            else:
+                return self.namespace, self.name
+
+        nameTuple = property(getNameTuple)
+
+    class TreeBuilder(base.TreeBuilder):  # pylint:disable=unused-variable
+        def documentClass(self):
+            self.dom = Dom.getDOMImplementation().createDocument(None, None, None)
+            return weakref.proxy(self)
+
+        def insertDoctype(self, token):
+            name = token["name"]
+            publicId = token["publicId"]
+            systemId = token["systemId"]
+
+            domimpl = Dom.getDOMImplementation()
+            doctype = domimpl.createDocumentType(name, publicId, systemId)
+            self.document.appendChild(NodeBuilder(doctype))
+            if Dom == minidom:
+                doctype.ownerDocument = self.dom
+
+        def elementClass(self, name, namespace=None):
+            if namespace is None and self.defaultNamespace is None:
+                node = self.dom.createElement(name)
+            else:
+                node = self.dom.createElementNS(namespace, name)
+
+            return NodeBuilder(node)
+
+        def commentClass(self, data):
+            return NodeBuilder(self.dom.createComment(data))
+
+        def fragmentClass(self):
+            return NodeBuilder(self.dom.createDocumentFragment())
+
+        def appendChild(self, node):
+            self.dom.appendChild(node.element)
+
+        def testSerializer(self, element):
+            return testSerializer(element)
+
+        def getDocument(self):
+            return self.dom
+
+        def getFragment(self):
+            return base.TreeBuilder.getFragment(self).element
+
+        def insertText(self, data, parent=None):
+            data = data
+            if parent != self:
+                base.TreeBuilder.insertText(self, data, parent)
+            else:
+                # HACK: allow text nodes as children of the document node
+                if hasattr(self.dom, '_child_node_types'):
+                    # pylint:disable=protected-access
+                    if Node.TEXT_NODE not in self.dom._child_node_types:
+                        self.dom._child_node_types = list(self.dom._child_node_types)
+                        self.dom._child_node_types.append(Node.TEXT_NODE)
+                self.dom.appendChild(self.dom.createTextNode(data))
+
+        implementation = DomImplementation
+        name = None
+
+    def testSerializer(element):
+        element.normalize()
+        rv = []
+
+        def serializeElement(element, indent=0):
+            if element.nodeType == Node.DOCUMENT_TYPE_NODE:
+                if element.name:
+                    if element.publicId or element.systemId:
+                        publicId = element.publicId or ""
+                        systemId = element.systemId or ""
+                        rv.append("""|%s<!DOCTYPE %s "%s" "%s">""" %
+                                  (' ' * indent, element.name, publicId, systemId))
+                    else:
+                        rv.append("|%s<!DOCTYPE %s>" % (' ' * indent, element.name))
+                else:
+                    rv.append("|%s<!DOCTYPE >" % (' ' * indent,))
+            elif element.nodeType == Node.DOCUMENT_NODE:
+                rv.append("#document")
+            elif element.nodeType == Node.DOCUMENT_FRAGMENT_NODE:
+                rv.append("#document-fragment")
+            elif element.nodeType == Node.COMMENT_NODE:
+                rv.append("|%s<!-- %s -->" % (' ' * indent, element.nodeValue))
+            elif element.nodeType == Node.TEXT_NODE:
+                rv.append("|%s\"%s\"" % (' ' * indent, element.nodeValue))
+            else:
+                if (hasattr(element, "namespaceURI") and
+                        element.namespaceURI is not None):
+                    name = "%s %s" % (constants.prefixes[element.namespaceURI],
+                                      element.nodeName)
+                else:
+                    name = element.nodeName
+                rv.append("|%s<%s>" % (' ' * indent, name))
+                if element.hasAttributes():
+                    attributes = []
+                    for i in range(len(element.attributes)):
+                        attr = element.attributes.item(i)
+                        name = attr.nodeName
+                        value = attr.value
+                        ns = attr.namespaceURI
+                        if ns:
+                            name = "%s %s" % (constants.prefixes[ns], attr.localName)
+                        else:
+                            name = attr.nodeName
+                        attributes.append((name, value))
+
+                    for name, value in sorted(attributes):
+                        rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value))
+            indent += 2
+            for child in element.childNodes:
+                serializeElement(child, indent)
+        serializeElement(element, 0)
+
+        return "\n".join(rv)
+
+    return locals()
+
+
+# The actual means to get a module!
+getDomModule = moduleFactoryFactory(getDomBuilder)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/etree.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/etree.py
new file mode 100644
index 0000000..ea92dc3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/etree.py
@@ -0,0 +1,343 @@
+from __future__ import absolute_import, division, unicode_literals
+# pylint:disable=protected-access
+
+from pip._vendor.six import text_type
+
+import re
+
+from copy import copy
+
+from . import base
+from .. import _ihatexml
+from .. import constants
+from ..constants import namespaces
+from .._utils import moduleFactoryFactory
+
+tag_regexp = re.compile("{([^}]*)}(.*)")
+
+
+def getETreeBuilder(ElementTreeImplementation, fullTree=False):
+    ElementTree = ElementTreeImplementation
+    ElementTreeCommentType = ElementTree.Comment("asd").tag
+
+    class Element(base.Node):
+        def __init__(self, name, namespace=None):
+            self._name = name
+            self._namespace = namespace
+            self._element = ElementTree.Element(self._getETreeTag(name,
+                                                                  namespace))
+            if namespace is None:
+                self.nameTuple = namespaces["html"], self._name
+            else:
+                self.nameTuple = self._namespace, self._name
+            self.parent = None
+            self._childNodes = []
+            self._flags = []
+
+        def _getETreeTag(self, name, namespace):
+            if namespace is None:
+                etree_tag = name
+            else:
+                etree_tag = "{%s}%s" % (namespace, name)
+            return etree_tag
+
+        def _setName(self, name):
+            self._name = name
+            self._element.tag = self._getETreeTag(self._name, self._namespace)
+
+        def _getName(self):
+            return self._name
+
+        name = property(_getName, _setName)
+
+        def _setNamespace(self, namespace):
+            self._namespace = namespace
+            self._element.tag = self._getETreeTag(self._name, self._namespace)
+
+        def _getNamespace(self):
+            return self._namespace
+
+        namespace = property(_getNamespace, _setNamespace)
+
+        def _getAttributes(self):
+            return self._element.attrib
+
+        def _setAttributes(self, attributes):
+            el_attrib = self._element.attrib
+            el_attrib.clear()
+            if attributes:
+                # calling .items _always_ allocates, and the above truthy check is cheaper than the
+                # allocation on average
+                for key, value in attributes.items():
+                    if isinstance(key, tuple):
+                        name = "{%s}%s" % (key[2], key[1])
+                    else:
+                        name = key
+                    el_attrib[name] = value
+
+        attributes = property(_getAttributes, _setAttributes)
+
+        def _getChildNodes(self):
+            return self._childNodes
+
+        def _setChildNodes(self, value):
+            del self._element[:]
+            self._childNodes = []
+            for element in value:
+                self.insertChild(element)
+
+        childNodes = property(_getChildNodes, _setChildNodes)
+
+        def hasContent(self):
+            """Return true if the node has children or text"""
+            return bool(self._element.text or len(self._element))
+
+        def appendChild(self, node):
+            self._childNodes.append(node)
+            self._element.append(node._element)
+            node.parent = self
+
+        def insertBefore(self, node, refNode):
+            index = list(self._element).index(refNode._element)
+            self._element.insert(index, node._element)
+            node.parent = self
+
+        def removeChild(self, node):
+            self._childNodes.remove(node)
+            self._element.remove(node._element)
+            node.parent = None
+
+        def insertText(self, data, insertBefore=None):
+            if not(len(self._element)):
+                if not self._element.text:
+                    self._element.text = ""
+                self._element.text += data
+            elif insertBefore is None:
+                # Insert the text as the tail of the last child element
+                if not self._element[-1].tail:
+                    self._element[-1].tail = ""
+                self._element[-1].tail += data
+            else:
+                # Insert the text before the specified node
+                children = list(self._element)
+                index = children.index(insertBefore._element)
+                if index > 0:
+                    if not self._element[index - 1].tail:
+                        self._element[index - 1].tail = ""
+                    self._element[index - 1].tail += data
+                else:
+                    if not self._element.text:
+                        self._element.text = ""
+                    self._element.text += data
+
+        def cloneNode(self):
+            element = type(self)(self.name, self.namespace)
+            if self._element.attrib:
+                element._element.attrib = copy(self._element.attrib)
+            return element
+
+        def reparentChildren(self, newParent):
+            if newParent.childNodes:
+                newParent.childNodes[-1]._element.tail += self._element.text
+            else:
+                if not newParent._element.text:
+                    newParent._element.text = ""
+                if self._element.text is not None:
+                    newParent._element.text += self._element.text
+            self._element.text = ""
+            base.Node.reparentChildren(self, newParent)
+
+    class Comment(Element):
+        def __init__(self, data):
+            # Use the superclass constructor to set all properties on the
+            # wrapper element
+            self._element = ElementTree.Comment(data)
+            self.parent = None
+            self._childNodes = []
+            self._flags = []
+
+        def _getData(self):
+            return self._element.text
+
+        def _setData(self, value):
+            self._element.text = value
+
+        data = property(_getData, _setData)
+
+    class DocumentType(Element):
+        def __init__(self, name, publicId, systemId):
+            Element.__init__(self, "<!DOCTYPE>")
+            self._element.text = name
+            self.publicId = publicId
+            self.systemId = systemId
+
+        def _getPublicId(self):
+            return self._element.get("publicId", "")
+
+        def _setPublicId(self, value):
+            if value is not None:
+                self._element.set("publicId", value)
+
+        publicId = property(_getPublicId, _setPublicId)
+
+        def _getSystemId(self):
+            return self._element.get("systemId", "")
+
+        def _setSystemId(self, value):
+            if value is not None:
+                self._element.set("systemId", value)
+
+        systemId = property(_getSystemId, _setSystemId)
+
+    class Document(Element):
+        def __init__(self):
+            Element.__init__(self, "DOCUMENT_ROOT")
+
+    class DocumentFragment(Element):
+        def __init__(self):
+            Element.__init__(self, "DOCUMENT_FRAGMENT")
+
+    def testSerializer(element):
+        rv = []
+
+        def serializeElement(element, indent=0):
+            if not(hasattr(element, "tag")):
+                element = element.getroot()
+            if element.tag == "<!DOCTYPE>":
+                if element.get("publicId") or element.get("systemId"):
+                    publicId = element.get("publicId") or ""
+                    systemId = element.get("systemId") or ""
+                    rv.append("""<!DOCTYPE %s "%s" "%s">""" %
+                              (element.text, publicId, systemId))
+                else:
+                    rv.append("<!DOCTYPE %s>" % (element.text,))
+            elif element.tag == "DOCUMENT_ROOT":
+                rv.append("#document")
+                if element.text is not None:
+                    rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text))
+                if element.tail is not None:
+                    raise TypeError("Document node cannot have tail")
+                if hasattr(element, "attrib") and len(element.attrib):
+                    raise TypeError("Document node cannot have attributes")
+            elif element.tag == ElementTreeCommentType:
+                rv.append("|%s<!-- %s -->" % (' ' * indent, element.text))
+            else:
+                assert isinstance(element.tag, text_type), \
+                    "Expected unicode, got %s, %s" % (type(element.tag), element.tag)
+                nsmatch = tag_regexp.match(element.tag)
+
+                if nsmatch is None:
+                    name = element.tag
+                else:
+                    ns, name = nsmatch.groups()
+                    prefix = constants.prefixes[ns]
+                    name = "%s %s" % (prefix, name)
+                rv.append("|%s<%s>" % (' ' * indent, name))
+
+                if hasattr(element, "attrib"):
+                    attributes = []
+                    for name, value in element.attrib.items():
+                        nsmatch = tag_regexp.match(name)
+                        if nsmatch is not None:
+                            ns, name = nsmatch.groups()
+                            prefix = constants.prefixes[ns]
+                            attr_string = "%s %s" % (prefix, name)
+                        else:
+                            attr_string = name
+                        attributes.append((attr_string, value))
+
+                    for name, value in sorted(attributes):
+                        rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value))
+                if element.text:
+                    rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text))
+            indent += 2
+            for child in element:
+                serializeElement(child, indent)
+            if element.tail:
+                rv.append("|%s\"%s\"" % (' ' * (indent - 2), element.tail))
+        serializeElement(element, 0)
+
+        return "\n".join(rv)
+
+    def tostring(element):  # pylint:disable=unused-variable
+        """Serialize an element and its child nodes to a string"""
+        rv = []
+        filter = _ihatexml.InfosetFilter()
+
+        def serializeElement(element):
+            if isinstance(element, ElementTree.ElementTree):
+                element = element.getroot()
+
+            if element.tag == "<!DOCTYPE>":
+                if element.get("publicId") or element.get("systemId"):
+                    publicId = element.get("publicId") or ""
+                    systemId = element.get("systemId") or ""
+                    rv.append("""<!DOCTYPE %s PUBLIC "%s" "%s">""" %
+                              (element.text, publicId, systemId))
+                else:
+                    rv.append("<!DOCTYPE %s>" % (element.text,))
+            elif element.tag == "DOCUMENT_ROOT":
+                if element.text is not None:
+                    rv.append(element.text)
+                if element.tail is not None:
+                    raise TypeError("Document node cannot have tail")
+                if hasattr(element, "attrib") and len(element.attrib):
+                    raise TypeError("Document node cannot have attributes")
+
+                for child in element:
+                    serializeElement(child)
+
+            elif element.tag == ElementTreeCommentType:
+                rv.append("<!--%s-->" % (element.text,))
+            else:
+                # This is assumed to be an ordinary element
+                if not element.attrib:
+                    rv.append("<%s>" % (filter.fromXmlName(element.tag),))
+                else:
+                    attr = " ".join(["%s=\"%s\"" % (
+                        filter.fromXmlName(name), value)
+                        for name, value in element.attrib.items()])
+                    rv.append("<%s %s>" % (element.tag, attr))
+                if element.text:
+                    rv.append(element.text)
+
+                for child in element:
+                    serializeElement(child)
+
+                rv.append("</%s>" % (element.tag,))
+
+            if element.tail:
+                rv.append(element.tail)
+
+        serializeElement(element)
+
+        return "".join(rv)
+
+    class TreeBuilder(base.TreeBuilder):  # pylint:disable=unused-variable
+        documentClass = Document
+        doctypeClass = DocumentType
+        elementClass = Element
+        commentClass = Comment
+        fragmentClass = DocumentFragment
+        implementation = ElementTreeImplementation
+
+        def testSerializer(self, element):
+            return testSerializer(element)
+
+        def getDocument(self):
+            if fullTree:
+                return self.document._element
+            else:
+                if self.defaultNamespace is not None:
+                    return self.document._element.find(
+                        "{%s}html" % self.defaultNamespace)
+                else:
+                    return self.document._element.find("html")
+
+        def getFragment(self):
+            return base.TreeBuilder.getFragment(self)._element
+
+    return locals()
+
+
+getETreeModule = moduleFactoryFactory(getETreeBuilder)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/etree_lxml.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/etree_lxml.py
new file mode 100644
index 0000000..f037759
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treebuilders/etree_lxml.py
@@ -0,0 +1,392 @@
+"""Module for supporting the lxml.etree library. The idea here is to use as much
+of the native library as possible, without using fragile hacks like custom element
+names that break between releases. The downside of this is that we cannot represent
+all possible trees; specifically the following are known to cause problems:
+
+Text or comments as siblings of the root element
+Docypes with no name
+
+When any of these things occur, we emit a DataLossWarning
+"""
+
+from __future__ import absolute_import, division, unicode_literals
+# pylint:disable=protected-access
+
+import warnings
+import re
+import sys
+
+try:
+    from collections.abc import MutableMapping
+except ImportError:
+    from collections import MutableMapping
+
+from . import base
+from ..constants import DataLossWarning
+from .. import constants
+from . import etree as etree_builders
+from .. import _ihatexml
+
+import lxml.etree as etree
+from pip._vendor.six import PY3, binary_type
+
+
+fullTree = True
+tag_regexp = re.compile("{([^}]*)}(.*)")
+
+comment_type = etree.Comment("asd").tag
+
+
+class DocumentType(object):
+    def __init__(self, name, publicId, systemId):
+        self.name = name
+        self.publicId = publicId
+        self.systemId = systemId
+
+
+class Document(object):
+    def __init__(self):
+        self._elementTree = None
+        self._childNodes = []
+
+    def appendChild(self, element):
+        last = self._elementTree.getroot()
+        for last in self._elementTree.getroot().itersiblings():
+            pass
+
+        last.addnext(element._element)
+
+    def _getChildNodes(self):
+        return self._childNodes
+
+    childNodes = property(_getChildNodes)
+
+
+def testSerializer(element):
+    rv = []
+    infosetFilter = _ihatexml.InfosetFilter(preventDoubleDashComments=True)
+
+    def serializeElement(element, indent=0):
+        if not hasattr(element, "tag"):
+            if hasattr(element, "getroot"):
+                # Full tree case
+                rv.append("#document")
+                if element.docinfo.internalDTD:
+                    if not (element.docinfo.public_id or
+                            element.docinfo.system_url):
+                        dtd_str = "<!DOCTYPE %s>" % element.docinfo.root_name
+                    else:
+                        dtd_str = """<!DOCTYPE %s "%s" "%s">""" % (
+                            element.docinfo.root_name,
+                            element.docinfo.public_id,
+                            element.docinfo.system_url)
+                    rv.append("|%s%s" % (' ' * (indent + 2), dtd_str))
+                next_element = element.getroot()
+                while next_element.getprevious() is not None:
+                    next_element = next_element.getprevious()
+                while next_element is not None:
+                    serializeElement(next_element, indent + 2)
+                    next_element = next_element.getnext()
+            elif isinstance(element, str) or isinstance(element, bytes):
+                # Text in a fragment
+                assert isinstance(element, str) or sys.version_info[0] == 2
+                rv.append("|%s\"%s\"" % (' ' * indent, element))
+            else:
+                # Fragment case
+                rv.append("#document-fragment")
+                for next_element in element:
+                    serializeElement(next_element, indent + 2)
+        elif element.tag == comment_type:
+            rv.append("|%s<!-- %s -->" % (' ' * indent, element.text))
+            if hasattr(element, "tail") and element.tail:
+                rv.append("|%s\"%s\"" % (' ' * indent, element.tail))
+        else:
+            assert isinstance(element, etree._Element)
+            nsmatch = etree_builders.tag_regexp.match(element.tag)
+            if nsmatch is not None:
+                ns = nsmatch.group(1)
+                tag = nsmatch.group(2)
+                prefix = constants.prefixes[ns]
+                rv.append("|%s<%s %s>" % (' ' * indent, prefix,
+                                          infosetFilter.fromXmlName(tag)))
+            else:
+                rv.append("|%s<%s>" % (' ' * indent,
+                                       infosetFilter.fromXmlName(element.tag)))
+
+            if hasattr(element, "attrib"):
+                attributes = []
+                for name, value in element.attrib.items():
+                    nsmatch = tag_regexp.match(name)
+                    if nsmatch is not None:
+                        ns, name = nsmatch.groups()
+                        name = infosetFilter.fromXmlName(name)
+                        prefix = constants.prefixes[ns]
+                        attr_string = "%s %s" % (prefix, name)
+                    else:
+                        attr_string = infosetFilter.fromXmlName(name)
+                    attributes.append((attr_string, value))
+
+                for name, value in sorted(attributes):
+                    rv.append('|%s%s="%s"' % (' ' * (indent + 2), name, value))
+
+            if element.text:
+                rv.append("|%s\"%s\"" % (' ' * (indent + 2), element.text))
+            indent += 2
+            for child in element:
+                serializeElement(child, indent)
+            if hasattr(element, "tail") and element.tail:
+                rv.append("|%s\"%s\"" % (' ' * (indent - 2), element.tail))
+    serializeElement(element, 0)
+
+    return "\n".join(rv)
+
+
+def tostring(element):
+    """Serialize an element and its child nodes to a string"""
+    rv = []
+
+    def serializeElement(element):
+        if not hasattr(element, "tag"):
+            if element.docinfo.internalDTD:
+                if element.docinfo.doctype:
+                    dtd_str = element.docinfo.doctype
+                else:
+                    dtd_str = "<!DOCTYPE %s>" % element.docinfo.root_name
+                rv.append(dtd_str)
+            serializeElement(element.getroot())
+
+        elif element.tag == comment_type:
+            rv.append("<!--%s-->" % (element.text,))
+
+        else:
+            # This is assumed to be an ordinary element
+            if not element.attrib:
+                rv.append("<%s>" % (element.tag,))
+            else:
+                attr = " ".join(["%s=\"%s\"" % (name, value)
+                                 for name, value in element.attrib.items()])
+                rv.append("<%s %s>" % (element.tag, attr))
+            if element.text:
+                rv.append(element.text)
+
+            for child in element:
+                serializeElement(child)
+
+            rv.append("</%s>" % (element.tag,))
+
+        if hasattr(element, "tail") and element.tail:
+            rv.append(element.tail)
+
+    serializeElement(element)
+
+    return "".join(rv)
+
+
+class TreeBuilder(base.TreeBuilder):
+    documentClass = Document
+    doctypeClass = DocumentType
+    elementClass = None
+    commentClass = None
+    fragmentClass = Document
+    implementation = etree
+
+    def __init__(self, namespaceHTMLElements, fullTree=False):
+        builder = etree_builders.getETreeModule(etree, fullTree=fullTree)
+        infosetFilter = self.infosetFilter = _ihatexml.InfosetFilter(preventDoubleDashComments=True)
+        self.namespaceHTMLElements = namespaceHTMLElements
+
+        class Attributes(MutableMapping):
+            def __init__(self, element):
+                self._element = element
+
+            def _coerceKey(self, key):
+                if isinstance(key, tuple):
+                    name = "{%s}%s" % (key[2], infosetFilter.coerceAttribute(key[1]))
+                else:
+                    name = infosetFilter.coerceAttribute(key)
+                return name
+
+            def __getitem__(self, key):
+                value = self._element._element.attrib[self._coerceKey(key)]
+                if not PY3 and isinstance(value, binary_type):
+                    value = value.decode("ascii")
+                return value
+
+            def __setitem__(self, key, value):
+                self._element._element.attrib[self._coerceKey(key)] = value
+
+            def __delitem__(self, key):
+                del self._element._element.attrib[self._coerceKey(key)]
+
+            def __iter__(self):
+                return iter(self._element._element.attrib)
+
+            def __len__(self):
+                return len(self._element._element.attrib)
+
+            def clear(self):
+                return self._element._element.attrib.clear()
+
+        class Element(builder.Element):
+            def __init__(self, name, namespace):
+                name = infosetFilter.coerceElement(name)
+                builder.Element.__init__(self, name, namespace=namespace)
+                self._attributes = Attributes(self)
+
+            def _setName(self, name):
+                self._name = infosetFilter.coerceElement(name)
+                self._element.tag = self._getETreeTag(
+                    self._name, self._namespace)
+
+            def _getName(self):
+                return infosetFilter.fromXmlName(self._name)
+
+            name = property(_getName, _setName)
+
+            def _getAttributes(self):
+                return self._attributes
+
+            def _setAttributes(self, value):
+                attributes = self.attributes
+                attributes.clear()
+                attributes.update(value)
+
+            attributes = property(_getAttributes, _setAttributes)
+
+            def insertText(self, data, insertBefore=None):
+                data = infosetFilter.coerceCharacters(data)
+                builder.Element.insertText(self, data, insertBefore)
+
+            def cloneNode(self):
+                element = type(self)(self.name, self.namespace)
+                if self._element.attrib:
+                    element._element.attrib.update(self._element.attrib)
+                return element
+
+        class Comment(builder.Comment):
+            def __init__(self, data):
+                data = infosetFilter.coerceComment(data)
+                builder.Comment.__init__(self, data)
+
+            def _setData(self, data):
+                data = infosetFilter.coerceComment(data)
+                self._element.text = data
+
+            def _getData(self):
+                return self._element.text
+
+            data = property(_getData, _setData)
+
+        self.elementClass = Element
+        self.commentClass = Comment
+        # self.fragmentClass = builder.DocumentFragment
+        base.TreeBuilder.__init__(self, namespaceHTMLElements)
+
+    def reset(self):
+        base.TreeBuilder.reset(self)
+        self.insertComment = self.insertCommentInitial
+        self.initial_comments = []
+        self.doctype = None
+
+    def testSerializer(self, element):
+        return testSerializer(element)
+
+    def getDocument(self):
+        if fullTree:
+            return self.document._elementTree
+        else:
+            return self.document._elementTree.getroot()
+
+    def getFragment(self):
+        fragment = []
+        element = self.openElements[0]._element
+        if element.text:
+            fragment.append(element.text)
+        fragment.extend(list(element))
+        if element.tail:
+            fragment.append(element.tail)
+        return fragment
+
+    def insertDoctype(self, token):
+        name = token["name"]
+        publicId = token["publicId"]
+        systemId = token["systemId"]
+
+        if not name:
+            warnings.warn("lxml cannot represent empty doctype", DataLossWarning)
+            self.doctype = None
+        else:
+            coercedName = self.infosetFilter.coerceElement(name)
+            if coercedName != name:
+                warnings.warn("lxml cannot represent non-xml doctype", DataLossWarning)
+
+            doctype = self.doctypeClass(coercedName, publicId, systemId)
+            self.doctype = doctype
+
+    def insertCommentInitial(self, data, parent=None):
+        assert parent is None or parent is self.document
+        assert self.document._elementTree is None
+        self.initial_comments.append(data)
+
+    def insertCommentMain(self, data, parent=None):
+        if (parent == self.document and
+                self.document._elementTree.getroot()[-1].tag == comment_type):
+            warnings.warn("lxml cannot represent adjacent comments beyond the root elements", DataLossWarning)
+        super(TreeBuilder, self).insertComment(data, parent)
+
+    def insertRoot(self, token):
+        # Because of the way libxml2 works, it doesn't seem to be possible to
+        # alter information like the doctype after the tree has been parsed.
+        # Therefore we need to use the built-in parser to create our initial
+        # tree, after which we can add elements like normal
+        docStr = ""
+        if self.doctype:
+            assert self.doctype.name
+            docStr += "<!DOCTYPE %s" % self.doctype.name
+            if (self.doctype.publicId is not None or
+                    self.doctype.systemId is not None):
+                docStr += (' PUBLIC "%s" ' %
+                           (self.infosetFilter.coercePubid(self.doctype.publicId or "")))
+                if self.doctype.systemId:
+                    sysid = self.doctype.systemId
+                    if sysid.find("'") >= 0 and sysid.find('"') >= 0:
+                        warnings.warn("DOCTYPE system cannot contain single and double quotes", DataLossWarning)
+                        sysid = sysid.replace("'", 'U00027')
+                    if sysid.find("'") >= 0:
+                        docStr += '"%s"' % sysid
+                    else:
+                        docStr += "'%s'" % sysid
+                else:
+                    docStr += "''"
+            docStr += ">"
+            if self.doctype.name != token["name"]:
+                warnings.warn("lxml cannot represent doctype with a different name to the root element", DataLossWarning)
+        docStr += "<THIS_SHOULD_NEVER_APPEAR_PUBLICLY/>"
+        root = etree.fromstring(docStr)
+
+        # Append the initial comments:
+        for comment_token in self.initial_comments:
+            comment = self.commentClass(comment_token["data"])
+            root.addprevious(comment._element)
+
+        # Create the root document and add the ElementTree to it
+        self.document = self.documentClass()
+        self.document._elementTree = root.getroottree()
+
+        # Give the root element the right name
+        name = token["name"]
+        namespace = token.get("namespace", self.defaultNamespace)
+        if namespace is None:
+            etree_tag = name
+        else:
+            etree_tag = "{%s}%s" % (namespace, name)
+        root.tag = etree_tag
+
+        # Add the root element to the internal child/open data structures
+        root_element = self.elementClass(name, namespace)
+        root_element._element = root
+        self.document._childNodes.append(root_element)
+        self.openElements.append(root_element)
+
+        # Reset to the default insert comment function
+        self.insertComment = self.insertCommentMain
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/__init__.py
new file mode 100644
index 0000000..b2d3aac
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/__init__.py
@@ -0,0 +1,154 @@
+"""A collection of modules for iterating through different kinds of
+tree, generating tokens identical to those produced by the tokenizer
+module.
+
+To create a tree walker for a new type of tree, you need to
+implement a tree walker object (called TreeWalker by convention) that
+implements a 'serialize' method which takes a tree as sole argument and
+returns an iterator which generates tokens.
+"""
+
+from __future__ import absolute_import, division, unicode_literals
+
+from .. import constants
+from .._utils import default_etree
+
+__all__ = ["getTreeWalker", "pprint"]
+
+treeWalkerCache = {}
+
+
+def getTreeWalker(treeType, implementation=None, **kwargs):
+    """Get a TreeWalker class for various types of tree with built-in support
+
+    :arg str treeType: the name of the tree type required (case-insensitive).
+        Supported values are:
+
+        * "dom": The xml.dom.minidom DOM implementation
+        * "etree": A generic walker for tree implementations exposing an
+          elementtree-like interface (known to work with ElementTree,
+          cElementTree and lxml.etree).
+        * "lxml": Optimized walker for lxml.etree
+        * "genshi": a Genshi stream
+
+    :arg implementation: A module implementing the tree type e.g.
+        xml.etree.ElementTree or cElementTree (Currently applies to the "etree"
+        tree type only).
+
+    :arg kwargs: keyword arguments passed to the etree walker--for other
+        walkers, this has no effect
+
+    :returns: a TreeWalker class
+
+    """
+
+    treeType = treeType.lower()
+    if treeType not in treeWalkerCache:
+        if treeType == "dom":
+            from . import dom
+            treeWalkerCache[treeType] = dom.TreeWalker
+        elif treeType == "genshi":
+            from . import genshi
+            treeWalkerCache[treeType] = genshi.TreeWalker
+        elif treeType == "lxml":
+            from . import etree_lxml
+            treeWalkerCache[treeType] = etree_lxml.TreeWalker
+        elif treeType == "etree":
+            from . import etree
+            if implementation is None:
+                implementation = default_etree
+            # XXX: NEVER cache here, caching is done in the etree submodule
+            return etree.getETreeModule(implementation, **kwargs).TreeWalker
+    return treeWalkerCache.get(treeType)
+
+
+def concatenateCharacterTokens(tokens):
+    pendingCharacters = []
+    for token in tokens:
+        type = token["type"]
+        if type in ("Characters", "SpaceCharacters"):
+            pendingCharacters.append(token["data"])
+        else:
+            if pendingCharacters:
+                yield {"type": "Characters", "data": "".join(pendingCharacters)}
+                pendingCharacters = []
+            yield token
+    if pendingCharacters:
+        yield {"type": "Characters", "data": "".join(pendingCharacters)}
+
+
+def pprint(walker):
+    """Pretty printer for tree walkers
+
+    Takes a TreeWalker instance and pretty prints the output of walking the tree.
+
+    :arg walker: a TreeWalker instance
+
+    """
+    output = []
+    indent = 0
+    for token in concatenateCharacterTokens(walker):
+        type = token["type"]
+        if type in ("StartTag", "EmptyTag"):
+            # tag name
+            if token["namespace"] and token["namespace"] != constants.namespaces["html"]:
+                if token["namespace"] in constants.prefixes:
+                    ns = constants.prefixes[token["namespace"]]
+                else:
+                    ns = token["namespace"]
+                name = "%s %s" % (ns, token["name"])
+            else:
+                name = token["name"]
+            output.append("%s<%s>" % (" " * indent, name))
+            indent += 2
+            # attributes (sorted for consistent ordering)
+            attrs = token["data"]
+            for (namespace, localname), value in sorted(attrs.items()):
+                if namespace:
+                    if namespace in constants.prefixes:
+                        ns = constants.prefixes[namespace]
+                    else:
+                        ns = namespace
+                    name = "%s %s" % (ns, localname)
+                else:
+                    name = localname
+                output.append("%s%s=\"%s\"" % (" " * indent, name, value))
+            # self-closing
+            if type == "EmptyTag":
+                indent -= 2
+
+        elif type == "EndTag":
+            indent -= 2
+
+        elif type == "Comment":
+            output.append("%s<!-- %s -->" % (" " * indent, token["data"]))
+
+        elif type == "Doctype":
+            if token["name"]:
+                if token["publicId"]:
+                    output.append("""%s<!DOCTYPE %s "%s" "%s">""" %
+                                  (" " * indent,
+                                   token["name"],
+                                   token["publicId"],
+                                   token["systemId"] if token["systemId"] else ""))
+                elif token["systemId"]:
+                    output.append("""%s<!DOCTYPE %s "" "%s">""" %
+                                  (" " * indent,
+                                   token["name"],
+                                   token["systemId"]))
+                else:
+                    output.append("%s<!DOCTYPE %s>" % (" " * indent,
+                                                       token["name"]))
+            else:
+                output.append("%s<!DOCTYPE >" % (" " * indent,))
+
+        elif type == "Characters":
+            output.append("%s\"%s\"" % (" " * indent, token["data"]))
+
+        elif type == "SpaceCharacters":
+            assert False, "concatenateCharacterTokens should have got rid of all Space tokens"
+
+        else:
+            raise ValueError("Unknown token type, %s" % type)
+
+    return "\n".join(output)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/base.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/base.py
new file mode 100644
index 0000000..80c474c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/base.py
@@ -0,0 +1,252 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from xml.dom import Node
+from ..constants import namespaces, voidElements, spaceCharacters
+
+__all__ = ["DOCUMENT", "DOCTYPE", "TEXT", "ELEMENT", "COMMENT", "ENTITY", "UNKNOWN",
+           "TreeWalker", "NonRecursiveTreeWalker"]
+
+DOCUMENT = Node.DOCUMENT_NODE
+DOCTYPE = Node.DOCUMENT_TYPE_NODE
+TEXT = Node.TEXT_NODE
+ELEMENT = Node.ELEMENT_NODE
+COMMENT = Node.COMMENT_NODE
+ENTITY = Node.ENTITY_NODE
+UNKNOWN = "<#UNKNOWN#>"
+
+spaceCharacters = "".join(spaceCharacters)
+
+
+class TreeWalker(object):
+    """Walks a tree yielding tokens
+
+    Tokens are dicts that all have a ``type`` field specifying the type of the
+    token.
+
+    """
+    def __init__(self, tree):
+        """Creates a TreeWalker
+
+        :arg tree: the tree to walk
+
+        """
+        self.tree = tree
+
+    def __iter__(self):
+        raise NotImplementedError
+
+    def error(self, msg):
+        """Generates an error token with the given message
+
+        :arg msg: the error message
+
+        :returns: SerializeError token
+
+        """
+        return {"type": "SerializeError", "data": msg}
+
+    def emptyTag(self, namespace, name, attrs, hasChildren=False):
+        """Generates an EmptyTag token
+
+        :arg namespace: the namespace of the token--can be ``None``
+
+        :arg name: the name of the element
+
+        :arg attrs: the attributes of the element as a dict
+
+        :arg hasChildren: whether or not to yield a SerializationError because
+            this tag shouldn't have children
+
+        :returns: EmptyTag token
+
+        """
+        yield {"type": "EmptyTag", "name": name,
+               "namespace": namespace,
+               "data": attrs}
+        if hasChildren:
+            yield self.error("Void element has children")
+
+    def startTag(self, namespace, name, attrs):
+        """Generates a StartTag token
+
+        :arg namespace: the namespace of the token--can be ``None``
+
+        :arg name: the name of the element
+
+        :arg attrs: the attributes of the element as a dict
+
+        :returns: StartTag token
+
+        """
+        return {"type": "StartTag",
+                "name": name,
+                "namespace": namespace,
+                "data": attrs}
+
+    def endTag(self, namespace, name):
+        """Generates an EndTag token
+
+        :arg namespace: the namespace of the token--can be ``None``
+
+        :arg name: the name of the element
+
+        :returns: EndTag token
+
+        """
+        return {"type": "EndTag",
+                "name": name,
+                "namespace": namespace}
+
+    def text(self, data):
+        """Generates SpaceCharacters and Characters tokens
+
+        Depending on what's in the data, this generates one or more
+        ``SpaceCharacters`` and ``Characters`` tokens.
+
+        For example:
+
+            >>> from html5lib.treewalkers.base import TreeWalker
+            >>> # Give it an empty tree just so it instantiates
+            >>> walker = TreeWalker([])
+            >>> list(walker.text(''))
+            []
+            >>> list(walker.text('  '))
+            [{u'data': '  ', u'type': u'SpaceCharacters'}]
+            >>> list(walker.text(' abc '))  # doctest: +NORMALIZE_WHITESPACE
+            [{u'data': ' ', u'type': u'SpaceCharacters'},
+            {u'data': u'abc', u'type': u'Characters'},
+            {u'data': u' ', u'type': u'SpaceCharacters'}]
+
+        :arg data: the text data
+
+        :returns: one or more ``SpaceCharacters`` and ``Characters`` tokens
+
+        """
+        data = data
+        middle = data.lstrip(spaceCharacters)
+        left = data[:len(data) - len(middle)]
+        if left:
+            yield {"type": "SpaceCharacters", "data": left}
+        data = middle
+        middle = data.rstrip(spaceCharacters)
+        right = data[len(middle):]
+        if middle:
+            yield {"type": "Characters", "data": middle}
+        if right:
+            yield {"type": "SpaceCharacters", "data": right}
+
+    def comment(self, data):
+        """Generates a Comment token
+
+        :arg data: the comment
+
+        :returns: Comment token
+
+        """
+        return {"type": "Comment", "data": data}
+
+    def doctype(self, name, publicId=None, systemId=None):
+        """Generates a Doctype token
+
+        :arg name:
+
+        :arg publicId:
+
+        :arg systemId:
+
+        :returns: the Doctype token
+
+        """
+        return {"type": "Doctype",
+                "name": name,
+                "publicId": publicId,
+                "systemId": systemId}
+
+    def entity(self, name):
+        """Generates an Entity token
+
+        :arg name: the entity name
+
+        :returns: an Entity token
+
+        """
+        return {"type": "Entity", "name": name}
+
+    def unknown(self, nodeType):
+        """Handles unknown node types"""
+        return self.error("Unknown node type: " + nodeType)
+
+
+class NonRecursiveTreeWalker(TreeWalker):
+    def getNodeDetails(self, node):
+        raise NotImplementedError
+
+    def getFirstChild(self, node):
+        raise NotImplementedError
+
+    def getNextSibling(self, node):
+        raise NotImplementedError
+
+    def getParentNode(self, node):
+        raise NotImplementedError
+
+    def __iter__(self):
+        currentNode = self.tree
+        while currentNode is not None:
+            details = self.getNodeDetails(currentNode)
+            type, details = details[0], details[1:]
+            hasChildren = False
+
+            if type == DOCTYPE:
+                yield self.doctype(*details)
+
+            elif type == TEXT:
+                for token in self.text(*details):
+                    yield token
+
+            elif type == ELEMENT:
+                namespace, name, attributes, hasChildren = details
+                if (not namespace or namespace == namespaces["html"]) and name in voidElements:
+                    for token in self.emptyTag(namespace, name, attributes,
+                                               hasChildren):
+                        yield token
+                    hasChildren = False
+                else:
+                    yield self.startTag(namespace, name, attributes)
+
+            elif type == COMMENT:
+                yield self.comment(details[0])
+
+            elif type == ENTITY:
+                yield self.entity(details[0])
+
+            elif type == DOCUMENT:
+                hasChildren = True
+
+            else:
+                yield self.unknown(details[0])
+
+            if hasChildren:
+                firstChild = self.getFirstChild(currentNode)
+            else:
+                firstChild = None
+
+            if firstChild is not None:
+                currentNode = firstChild
+            else:
+                while currentNode is not None:
+                    details = self.getNodeDetails(currentNode)
+                    type, details = details[0], details[1:]
+                    if type == ELEMENT:
+                        namespace, name, attributes, hasChildren = details
+                        if (namespace and namespace != namespaces["html"]) or name not in voidElements:
+                            yield self.endTag(namespace, name)
+                    if self.tree is currentNode:
+                        currentNode = None
+                        break
+                    nextSibling = self.getNextSibling(currentNode)
+                    if nextSibling is not None:
+                        currentNode = nextSibling
+                        break
+                    else:
+                        currentNode = self.getParentNode(currentNode)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/dom.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/dom.py
new file mode 100644
index 0000000..b0c89b0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/dom.py
@@ -0,0 +1,43 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from xml.dom import Node
+
+from . import base
+
+
+class TreeWalker(base.NonRecursiveTreeWalker):
+    def getNodeDetails(self, node):
+        if node.nodeType == Node.DOCUMENT_TYPE_NODE:
+            return base.DOCTYPE, node.name, node.publicId, node.systemId
+
+        elif node.nodeType in (Node.TEXT_NODE, Node.CDATA_SECTION_NODE):
+            return base.TEXT, node.nodeValue
+
+        elif node.nodeType == Node.ELEMENT_NODE:
+            attrs = {}
+            for attr in list(node.attributes.keys()):
+                attr = node.getAttributeNode(attr)
+                if attr.namespaceURI:
+                    attrs[(attr.namespaceURI, attr.localName)] = attr.value
+                else:
+                    attrs[(None, attr.name)] = attr.value
+            return (base.ELEMENT, node.namespaceURI, node.nodeName,
+                    attrs, node.hasChildNodes())
+
+        elif node.nodeType == Node.COMMENT_NODE:
+            return base.COMMENT, node.nodeValue
+
+        elif node.nodeType in (Node.DOCUMENT_NODE, Node.DOCUMENT_FRAGMENT_NODE):
+            return (base.DOCUMENT,)
+
+        else:
+            return base.UNKNOWN, node.nodeType
+
+    def getFirstChild(self, node):
+        return node.firstChild
+
+    def getNextSibling(self, node):
+        return node.nextSibling
+
+    def getParentNode(self, node):
+        return node.parentNode
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/etree.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/etree.py
new file mode 100644
index 0000000..837b27e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/etree.py
@@ -0,0 +1,131 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from collections import OrderedDict
+import re
+
+from pip._vendor.six import string_types
+
+from . import base
+from .._utils import moduleFactoryFactory
+
+tag_regexp = re.compile("{([^}]*)}(.*)")
+
+
+def getETreeBuilder(ElementTreeImplementation):
+    ElementTree = ElementTreeImplementation
+    ElementTreeCommentType = ElementTree.Comment("asd").tag
+
+    class TreeWalker(base.NonRecursiveTreeWalker):  # pylint:disable=unused-variable
+        """Given the particular ElementTree representation, this implementation,
+        to avoid using recursion, returns "nodes" as tuples with the following
+        content:
+
+        1. The current element
+
+        2. The index of the element relative to its parent
+
+        3. A stack of ancestor elements
+
+        4. A flag "text", "tail" or None to indicate if the current node is a
+           text node; either the text or tail of the current element (1)
+        """
+        def getNodeDetails(self, node):
+            if isinstance(node, tuple):  # It might be the root Element
+                elt, _, _, flag = node
+                if flag in ("text", "tail"):
+                    return base.TEXT, getattr(elt, flag)
+                else:
+                    node = elt
+
+            if not(hasattr(node, "tag")):
+                node = node.getroot()
+
+            if node.tag in ("DOCUMENT_ROOT", "DOCUMENT_FRAGMENT"):
+                return (base.DOCUMENT,)
+
+            elif node.tag == "<!DOCTYPE>":
+                return (base.DOCTYPE, node.text,
+                        node.get("publicId"), node.get("systemId"))
+
+            elif node.tag == ElementTreeCommentType:
+                return base.COMMENT, node.text
+
+            else:
+                assert isinstance(node.tag, string_types), type(node.tag)
+                # This is assumed to be an ordinary element
+                match = tag_regexp.match(node.tag)
+                if match:
+                    namespace, tag = match.groups()
+                else:
+                    namespace = None
+                    tag = node.tag
+                attrs = OrderedDict()
+                for name, value in list(node.attrib.items()):
+                    match = tag_regexp.match(name)
+                    if match:
+                        attrs[(match.group(1), match.group(2))] = value
+                    else:
+                        attrs[(None, name)] = value
+                return (base.ELEMENT, namespace, tag,
+                        attrs, len(node) or node.text)
+
+        def getFirstChild(self, node):
+            if isinstance(node, tuple):
+                element, key, parents, flag = node
+            else:
+                element, key, parents, flag = node, None, [], None
+
+            if flag in ("text", "tail"):
+                return None
+            else:
+                if element.text:
+                    return element, key, parents, "text"
+                elif len(element):
+                    parents.append(element)
+                    return element[0], 0, parents, None
+                else:
+                    return None
+
+        def getNextSibling(self, node):
+            if isinstance(node, tuple):
+                element, key, parents, flag = node
+            else:
+                return None
+
+            if flag == "text":
+                if len(element):
+                    parents.append(element)
+                    return element[0], 0, parents, None
+                else:
+                    return None
+            else:
+                if element.tail and flag != "tail":
+                    return element, key, parents, "tail"
+                elif key < len(parents[-1]) - 1:
+                    return parents[-1][key + 1], key + 1, parents, None
+                else:
+                    return None
+
+        def getParentNode(self, node):
+            if isinstance(node, tuple):
+                element, key, parents, flag = node
+            else:
+                return None
+
+            if flag == "text":
+                if not parents:
+                    return element
+                else:
+                    return element, key, parents, None
+            else:
+                parent = parents.pop()
+                if not parents:
+                    return parent
+                else:
+                    assert list(parents[-1]).count(parent) == 1
+                    return parent, list(parents[-1]).index(parent), parents, None
+
+    return locals()
+
+
+getETreeModule = moduleFactoryFactory(getETreeBuilder)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/etree_lxml.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/etree_lxml.py
new file mode 100644
index 0000000..c56af39
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/etree_lxml.py
@@ -0,0 +1,215 @@
+from __future__ import absolute_import, division, unicode_literals
+from pip._vendor.six import text_type
+
+from collections import OrderedDict
+
+from lxml import etree
+from ..treebuilders.etree import tag_regexp
+
+from . import base
+
+from .. import _ihatexml
+
+
+def ensure_str(s):
+    if s is None:
+        return None
+    elif isinstance(s, text_type):
+        return s
+    else:
+        return s.decode("ascii", "strict")
+
+
+class Root(object):
+    def __init__(self, et):
+        self.elementtree = et
+        self.children = []
+
+        try:
+            if et.docinfo.internalDTD:
+                self.children.append(Doctype(self,
+                                             ensure_str(et.docinfo.root_name),
+                                             ensure_str(et.docinfo.public_id),
+                                             ensure_str(et.docinfo.system_url)))
+        except AttributeError:
+            pass
+
+        try:
+            node = et.getroot()
+        except AttributeError:
+            node = et
+
+        while node.getprevious() is not None:
+            node = node.getprevious()
+        while node is not None:
+            self.children.append(node)
+            node = node.getnext()
+
+        self.text = None
+        self.tail = None
+
+    def __getitem__(self, key):
+        return self.children[key]
+
+    def getnext(self):
+        return None
+
+    def __len__(self):
+        return 1
+
+
+class Doctype(object):
+    def __init__(self, root_node, name, public_id, system_id):
+        self.root_node = root_node
+        self.name = name
+        self.public_id = public_id
+        self.system_id = system_id
+
+        self.text = None
+        self.tail = None
+
+    def getnext(self):
+        return self.root_node.children[1]
+
+
+class FragmentRoot(Root):
+    def __init__(self, children):
+        self.children = [FragmentWrapper(self, child) for child in children]
+        self.text = self.tail = None
+
+    def getnext(self):
+        return None
+
+
+class FragmentWrapper(object):
+    def __init__(self, fragment_root, obj):
+        self.root_node = fragment_root
+        self.obj = obj
+        if hasattr(self.obj, 'text'):
+            self.text = ensure_str(self.obj.text)
+        else:
+            self.text = None
+        if hasattr(self.obj, 'tail'):
+            self.tail = ensure_str(self.obj.tail)
+        else:
+            self.tail = None
+
+    def __getattr__(self, name):
+        return getattr(self.obj, name)
+
+    def getnext(self):
+        siblings = self.root_node.children
+        idx = siblings.index(self)
+        if idx < len(siblings) - 1:
+            return siblings[idx + 1]
+        else:
+            return None
+
+    def __getitem__(self, key):
+        return self.obj[key]
+
+    def __bool__(self):
+        return bool(self.obj)
+
+    def getparent(self):
+        return None
+
+    def __str__(self):
+        return str(self.obj)
+
+    def __unicode__(self):
+        return str(self.obj)
+
+    def __len__(self):
+        return len(self.obj)
+
+
+class TreeWalker(base.NonRecursiveTreeWalker):
+    def __init__(self, tree):
+        # pylint:disable=redefined-variable-type
+        if isinstance(tree, list):
+            self.fragmentChildren = set(tree)
+            tree = FragmentRoot(tree)
+        else:
+            self.fragmentChildren = set()
+            tree = Root(tree)
+        base.NonRecursiveTreeWalker.__init__(self, tree)
+        self.filter = _ihatexml.InfosetFilter()
+
+    def getNodeDetails(self, node):
+        if isinstance(node, tuple):  # Text node
+            node, key = node
+            assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key
+            return base.TEXT, ensure_str(getattr(node, key))
+
+        elif isinstance(node, Root):
+            return (base.DOCUMENT,)
+
+        elif isinstance(node, Doctype):
+            return base.DOCTYPE, node.name, node.public_id, node.system_id
+
+        elif isinstance(node, FragmentWrapper) and not hasattr(node, "tag"):
+            return base.TEXT, ensure_str(node.obj)
+
+        elif node.tag == etree.Comment:
+            return base.COMMENT, ensure_str(node.text)
+
+        elif node.tag == etree.Entity:
+            return base.ENTITY, ensure_str(node.text)[1:-1]  # strip &;
+
+        else:
+            # This is assumed to be an ordinary element
+            match = tag_regexp.match(ensure_str(node.tag))
+            if match:
+                namespace, tag = match.groups()
+            else:
+                namespace = None
+                tag = ensure_str(node.tag)
+            attrs = OrderedDict()
+            for name, value in list(node.attrib.items()):
+                name = ensure_str(name)
+                value = ensure_str(value)
+                match = tag_regexp.match(name)
+                if match:
+                    attrs[(match.group(1), match.group(2))] = value
+                else:
+                    attrs[(None, name)] = value
+            return (base.ELEMENT, namespace, self.filter.fromXmlName(tag),
+                    attrs, len(node) > 0 or node.text)
+
+    def getFirstChild(self, node):
+        assert not isinstance(node, tuple), "Text nodes have no children"
+
+        assert len(node) or node.text, "Node has no children"
+        if node.text:
+            return (node, "text")
+        else:
+            return node[0]
+
+    def getNextSibling(self, node):
+        if isinstance(node, tuple):  # Text node
+            node, key = node
+            assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key
+            if key == "text":
+                # XXX: we cannot use a "bool(node) and node[0] or None" construct here
+                # because node[0] might evaluate to False if it has no child element
+                if len(node):
+                    return node[0]
+                else:
+                    return None
+            else:  # tail
+                return node.getnext()
+
+        return (node, "tail") if node.tail else node.getnext()
+
+    def getParentNode(self, node):
+        if isinstance(node, tuple):  # Text node
+            node, key = node
+            assert key in ("text", "tail"), "Text nodes are text or tail, found %s" % key
+            if key == "text":
+                return node
+            # else: fallback to "normal" processing
+        elif node in self.fragmentChildren:
+            return None
+
+        return node.getparent()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/genshi.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/genshi.py
new file mode 100644
index 0000000..7483be2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/html5lib/treewalkers/genshi.py
@@ -0,0 +1,69 @@
+from __future__ import absolute_import, division, unicode_literals
+
+from genshi.core import QName
+from genshi.core import START, END, XML_NAMESPACE, DOCTYPE, TEXT
+from genshi.core import START_NS, END_NS, START_CDATA, END_CDATA, PI, COMMENT
+
+from . import base
+
+from ..constants import voidElements, namespaces
+
+
+class TreeWalker(base.TreeWalker):
+    def __iter__(self):
+        # Buffer the events so we can pass in the following one
+        previous = None
+        for event in self.tree:
+            if previous is not None:
+                for token in self.tokens(previous, event):
+                    yield token
+            previous = event
+
+        # Don't forget the final event!
+        if previous is not None:
+            for token in self.tokens(previous, None):
+                yield token
+
+    def tokens(self, event, next):
+        kind, data, _ = event
+        if kind == START:
+            tag, attribs = data
+            name = tag.localname
+            namespace = tag.namespace
+            converted_attribs = {}
+            for k, v in attribs:
+                if isinstance(k, QName):
+                    converted_attribs[(k.namespace, k.localname)] = v
+                else:
+                    converted_attribs[(None, k)] = v
+
+            if namespace == namespaces["html"] and name in voidElements:
+                for token in self.emptyTag(namespace, name, converted_attribs,
+                                           not next or next[0] != END or
+                                           next[1] != tag):
+                    yield token
+            else:
+                yield self.startTag(namespace, name, converted_attribs)
+
+        elif kind == END:
+            name = data.localname
+            namespace = data.namespace
+            if namespace != namespaces["html"] or name not in voidElements:
+                yield self.endTag(namespace, name)
+
+        elif kind == COMMENT:
+            yield self.comment(data)
+
+        elif kind == TEXT:
+            for token in self.text(data):
+                yield token
+
+        elif kind == DOCTYPE:
+            yield self.doctype(*data)
+
+        elif kind in (XML_NAMESPACE, DOCTYPE, START_NS, END_NS,
+                      START_CDATA, END_CDATA, PI):
+            pass
+
+        else:
+            yield self.unknown(kind)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/__init__.py
new file mode 100644
index 0000000..847bf93
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/__init__.py
@@ -0,0 +1,2 @@
+from .package_data import __version__
+from .core import *
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/codec.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/codec.py
new file mode 100644
index 0000000..98c65ea
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/codec.py
@@ -0,0 +1,118 @@
+from .core import encode, decode, alabel, ulabel, IDNAError
+import codecs
+import re
+
+_unicode_dots_re = re.compile(u'[\u002e\u3002\uff0e\uff61]')
+
+class Codec(codecs.Codec):
+
+    def encode(self, data, errors='strict'):
+
+        if errors != 'strict':
+            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
+
+        if not data:
+            return "", 0
+
+        return encode(data), len(data)
+
+    def decode(self, data, errors='strict'):
+
+        if errors != 'strict':
+            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
+
+        if not data:
+            return u"", 0
+
+        return decode(data), len(data)
+
+class IncrementalEncoder(codecs.BufferedIncrementalEncoder):
+    def _buffer_encode(self, data, errors, final):
+        if errors != 'strict':
+            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
+
+        if not data:
+            return ("", 0)
+
+        labels = _unicode_dots_re.split(data)
+        trailing_dot = u''
+        if labels:
+            if not labels[-1]:
+                trailing_dot = '.'
+                del labels[-1]
+            elif not final:
+                # Keep potentially unfinished label until the next call
+                del labels[-1]
+                if labels:
+                    trailing_dot = '.'
+
+        result = []
+        size = 0
+        for label in labels:
+            result.append(alabel(label))
+            if size:
+                size += 1
+            size += len(label)
+
+        # Join with U+002E
+        result = ".".join(result) + trailing_dot
+        size += len(trailing_dot)
+        return (result, size)
+
+class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
+    def _buffer_decode(self, data, errors, final):
+        if errors != 'strict':
+            raise IDNAError("Unsupported error handling \"{0}\"".format(errors))
+
+        if not data:
+            return (u"", 0)
+
+        # IDNA allows decoding to operate on Unicode strings, too.
+        if isinstance(data, unicode):
+            labels = _unicode_dots_re.split(data)
+        else:
+            # Must be ASCII string
+            data = str(data)
+            unicode(data, "ascii")
+            labels = data.split(".")
+
+        trailing_dot = u''
+        if labels:
+            if not labels[-1]:
+                trailing_dot = u'.'
+                del labels[-1]
+            elif not final:
+                # Keep potentially unfinished label until the next call
+                del labels[-1]
+                if labels:
+                    trailing_dot = u'.'
+
+        result = []
+        size = 0
+        for label in labels:
+            result.append(ulabel(label))
+            if size:
+                size += 1
+            size += len(label)
+
+        result = u".".join(result) + trailing_dot
+        size += len(trailing_dot)
+        return (result, size)
+
+
+class StreamWriter(Codec, codecs.StreamWriter):
+    pass
+
+class StreamReader(Codec, codecs.StreamReader):
+    pass
+
+def getregentry():
+    return codecs.CodecInfo(
+        name='idna',
+        encode=Codec().encode,
+        decode=Codec().decode,
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamwriter=StreamWriter,
+        streamreader=StreamReader,
+    )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/compat.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/compat.py
new file mode 100644
index 0000000..4d47f33
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/compat.py
@@ -0,0 +1,12 @@
+from .core import *
+from .codec import *
+
+def ToASCII(label):
+    return encode(label)
+
+def ToUnicode(label):
+    return decode(label)
+
+def nameprep(s):
+    raise NotImplementedError("IDNA 2008 does not utilise nameprep protocol")
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/core.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/core.py
new file mode 100644
index 0000000..41ec5c7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/core.py
@@ -0,0 +1,400 @@
+from . import idnadata
+import bisect
+import unicodedata
+import re
+import sys
+from .intranges import intranges_contain
+
+_virama_combining_class = 9
+_alabel_prefix = b'xn--'
+_unicode_dots_re = re.compile(u'[\u002e\u3002\uff0e\uff61]')
+
+if sys.version_info[0] >= 3:
+    unicode = str
+    unichr = chr
+
+class IDNAError(UnicodeError):
+    """ Base exception for all IDNA-encoding related problems """
+    pass
+
+
+class IDNABidiError(IDNAError):
+    """ Exception when bidirectional requirements are not satisfied """
+    pass
+
+
+class InvalidCodepoint(IDNAError):
+    """ Exception when a disallowed or unallocated codepoint is used """
+    pass
+
+
+class InvalidCodepointContext(IDNAError):
+    """ Exception when the codepoint is not valid in the context it is used """
+    pass
+
+
+def _combining_class(cp):
+    v = unicodedata.combining(unichr(cp))
+    if v == 0:
+        if not unicodedata.name(unichr(cp)):
+            raise ValueError("Unknown character in unicodedata")
+    return v
+
+def _is_script(cp, script):
+    return intranges_contain(ord(cp), idnadata.scripts[script])
+
+def _punycode(s):
+    return s.encode('punycode')
+
+def _unot(s):
+    return 'U+{0:04X}'.format(s)
+
+
+def valid_label_length(label):
+
+    if len(label) > 63:
+        return False
+    return True
+
+
+def valid_string_length(label, trailing_dot):
+
+    if len(label) > (254 if trailing_dot else 253):
+        return False
+    return True
+
+
+def check_bidi(label, check_ltr=False):
+
+    # Bidi rules should only be applied if string contains RTL characters
+    bidi_label = False
+    for (idx, cp) in enumerate(label, 1):
+        direction = unicodedata.bidirectional(cp)
+        if direction == '':
+            # String likely comes from a newer version of Unicode
+            raise IDNABidiError('Unknown directionality in label {0} at position {1}'.format(repr(label), idx))
+        if direction in ['R', 'AL', 'AN']:
+            bidi_label = True
+    if not bidi_label and not check_ltr:
+        return True
+
+    # Bidi rule 1
+    direction = unicodedata.bidirectional(label[0])
+    if direction in ['R', 'AL']:
+        rtl = True
+    elif direction == 'L':
+        rtl = False
+    else:
+        raise IDNABidiError('First codepoint in label {0} must be directionality L, R or AL'.format(repr(label)))
+
+    valid_ending = False
+    number_type = False
+    for (idx, cp) in enumerate(label, 1):
+        direction = unicodedata.bidirectional(cp)
+
+        if rtl:
+            # Bidi rule 2
+            if not direction in ['R', 'AL', 'AN', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']:
+                raise IDNABidiError('Invalid direction for codepoint at position {0} in a right-to-left label'.format(idx))
+            # Bidi rule 3
+            if direction in ['R', 'AL', 'EN', 'AN']:
+                valid_ending = True
+            elif direction != 'NSM':
+                valid_ending = False
+            # Bidi rule 4
+            if direction in ['AN', 'EN']:
+                if not number_type:
+                    number_type = direction
+                else:
+                    if number_type != direction:
+                        raise IDNABidiError('Can not mix numeral types in a right-to-left label')
+        else:
+            # Bidi rule 5
+            if not direction in ['L', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']:
+                raise IDNABidiError('Invalid direction for codepoint at position {0} in a left-to-right label'.format(idx))
+            # Bidi rule 6
+            if direction in ['L', 'EN']:
+                valid_ending = True
+            elif direction != 'NSM':
+                valid_ending = False
+
+    if not valid_ending:
+        raise IDNABidiError('Label ends with illegal codepoint directionality')
+
+    return True
+
+
+def check_initial_combiner(label):
+
+    if unicodedata.category(label[0])[0] == 'M':
+        raise IDNAError('Label begins with an illegal combining character')
+    return True
+
+
+def check_hyphen_ok(label):
+
+    if label[2:4] == '--':
+        raise IDNAError('Label has disallowed hyphens in 3rd and 4th position')
+    if label[0] == '-' or label[-1] == '-':
+        raise IDNAError('Label must not start or end with a hyphen')
+    return True
+
+
+def check_nfc(label):
+
+    if unicodedata.normalize('NFC', label) != label:
+        raise IDNAError('Label must be in Normalization Form C')
+
+
+def valid_contextj(label, pos):
+
+    cp_value = ord(label[pos])
+
+    if cp_value == 0x200c:
+
+        if pos > 0:
+            if _combining_class(ord(label[pos - 1])) == _virama_combining_class:
+                return True
+
+        ok = False
+        for i in range(pos-1, -1, -1):
+            joining_type = idnadata.joining_types.get(ord(label[i]))
+            if joining_type == ord('T'):
+                continue
+            if joining_type in [ord('L'), ord('D')]:
+                ok = True
+                break
+
+        if not ok:
+            return False
+
+        ok = False
+        for i in range(pos+1, len(label)):
+            joining_type = idnadata.joining_types.get(ord(label[i]))
+            if joining_type == ord('T'):
+                continue
+            if joining_type in [ord('R'), ord('D')]:
+                ok = True
+                break
+        return ok
+
+    if cp_value == 0x200d:
+
+        if pos > 0:
+            if _combining_class(ord(label[pos - 1])) == _virama_combining_class:
+                return True
+        return False
+
+    else:
+
+        return False
+
+
+def valid_contexto(label, pos, exception=False):
+
+    cp_value = ord(label[pos])
+
+    if cp_value == 0x00b7:
+        if 0 < pos < len(label)-1:
+            if ord(label[pos - 1]) == 0x006c and ord(label[pos + 1]) == 0x006c:
+                return True
+        return False
+
+    elif cp_value == 0x0375:
+        if pos < len(label)-1 and len(label) > 1:
+            return _is_script(label[pos + 1], 'Greek')
+        return False
+
+    elif cp_value == 0x05f3 or cp_value == 0x05f4:
+        if pos > 0:
+            return _is_script(label[pos - 1], 'Hebrew')
+        return False
+
+    elif cp_value == 0x30fb:
+        for cp in label:
+            if cp == u'\u30fb':
+                continue
+            if _is_script(cp, 'Hiragana') or _is_script(cp, 'Katakana') or _is_script(cp, 'Han'):
+                return True
+        return False
+
+    elif 0x660 <= cp_value <= 0x669:
+        for cp in label:
+            if 0x6f0 <= ord(cp) <= 0x06f9:
+                return False
+        return True
+
+    elif 0x6f0 <= cp_value <= 0x6f9:
+        for cp in label:
+            if 0x660 <= ord(cp) <= 0x0669:
+                return False
+        return True
+
+
+def check_label(label):
+
+    if isinstance(label, (bytes, bytearray)):
+        label = label.decode('utf-8')
+    if len(label) == 0:
+        raise IDNAError('Empty Label')
+
+    check_nfc(label)
+    check_hyphen_ok(label)
+    check_initial_combiner(label)
+
+    for (pos, cp) in enumerate(label):
+        cp_value = ord(cp)
+        if intranges_contain(cp_value, idnadata.codepoint_classes['PVALID']):
+            continue
+        elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTJ']):
+            try:
+                if not valid_contextj(label, pos):
+                    raise InvalidCodepointContext('Joiner {0} not allowed at position {1} in {2}'.format(
+                        _unot(cp_value), pos+1, repr(label)))
+            except ValueError:
+                raise IDNAError('Unknown codepoint adjacent to joiner {0} at position {1} in {2}'.format(
+                    _unot(cp_value), pos+1, repr(label)))
+        elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTO']):
+            if not valid_contexto(label, pos):
+                raise InvalidCodepointContext('Codepoint {0} not allowed at position {1} in {2}'.format(_unot(cp_value), pos+1, repr(label)))
+        else:
+            raise InvalidCodepoint('Codepoint {0} at position {1} of {2} not allowed'.format(_unot(cp_value), pos+1, repr(label)))
+
+    check_bidi(label)
+
+
+def alabel(label):
+
+    try:
+        label = label.encode('ascii')
+        ulabel(label)
+        if not valid_label_length(label):
+            raise IDNAError('Label too long')
+        return label
+    except UnicodeEncodeError:
+        pass
+
+    if not label:
+        raise IDNAError('No Input')
+
+    label = unicode(label)
+    check_label(label)
+    label = _punycode(label)
+    label = _alabel_prefix + label
+
+    if not valid_label_length(label):
+        raise IDNAError('Label too long')
+
+    return label
+
+
+def ulabel(label):
+
+    if not isinstance(label, (bytes, bytearray)):
+        try:
+            label = label.encode('ascii')
+        except UnicodeEncodeError:
+            check_label(label)
+            return label
+
+    label = label.lower()
+    if label.startswith(_alabel_prefix):
+        label = label[len(_alabel_prefix):]
+        if not label:
+            raise IDNAError('Malformed A-label, no Punycode eligible content found')
+        if label.decode('ascii')[-1] == '-':
+            raise IDNAError('A-label must not end with a hyphen')
+    else:
+        check_label(label)
+        return label.decode('ascii')
+
+    label = label.decode('punycode')
+    check_label(label)
+    return label
+
+
+def uts46_remap(domain, std3_rules=True, transitional=False):
+    """Re-map the characters in the string according to UTS46 processing."""
+    from .uts46data import uts46data
+    output = u""
+    try:
+        for pos, char in enumerate(domain):
+            code_point = ord(char)
+            uts46row = uts46data[code_point if code_point < 256 else
+                bisect.bisect_left(uts46data, (code_point, "Z")) - 1]
+            status = uts46row[1]
+            replacement = uts46row[2] if len(uts46row) == 3 else None
+            if (status == "V" or
+                    (status == "D" and not transitional) or
+                    (status == "3" and not std3_rules and replacement is None)):
+                output += char
+            elif replacement is not None and (status == "M" or
+                    (status == "3" and not std3_rules) or
+                    (status == "D" and transitional)):
+                output += replacement
+            elif status != "I":
+                raise IndexError()
+        return unicodedata.normalize("NFC", output)
+    except IndexError:
+        raise InvalidCodepoint(
+            "Codepoint {0} not allowed at position {1} in {2}".format(
+            _unot(code_point), pos + 1, repr(domain)))
+
+
+def encode(s, strict=False, uts46=False, std3_rules=False, transitional=False):
+
+    if isinstance(s, (bytes, bytearray)):
+        s = s.decode("ascii")
+    if uts46:
+        s = uts46_remap(s, std3_rules, transitional)
+    trailing_dot = False
+    result = []
+    if strict:
+        labels = s.split('.')
+    else:
+        labels = _unicode_dots_re.split(s)
+    if not labels or labels == ['']:
+        raise IDNAError('Empty domain')
+    if labels[-1] == '':
+        del labels[-1]
+        trailing_dot = True
+    for label in labels:
+        s = alabel(label)
+        if s:
+            result.append(s)
+        else:
+            raise IDNAError('Empty label')
+    if trailing_dot:
+        result.append(b'')
+    s = b'.'.join(result)
+    if not valid_string_length(s, trailing_dot):
+        raise IDNAError('Domain too long')
+    return s
+
+
+def decode(s, strict=False, uts46=False, std3_rules=False):
+
+    if isinstance(s, (bytes, bytearray)):
+        s = s.decode("ascii")
+    if uts46:
+        s = uts46_remap(s, std3_rules, False)
+    trailing_dot = False
+    result = []
+    if not strict:
+        labels = _unicode_dots_re.split(s)
+    else:
+        labels = s.split(u'.')
+    if not labels or labels == ['']:
+        raise IDNAError('Empty domain')
+    if not labels[-1]:
+        del labels[-1]
+        trailing_dot = True
+    for label in labels:
+        s = ulabel(label)
+        if s:
+            result.append(s)
+        else:
+            raise IDNAError('Empty label')
+    if trailing_dot:
+        result.append(u'')
+    return u'.'.join(result)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/idnadata.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/idnadata.py
new file mode 100644
index 0000000..a284e4c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/idnadata.py
@@ -0,0 +1,2050 @@
+# This file is automatically generated by tools/idna-data
+
+__version__ = "13.0.0"
+scripts = {
+    'Greek': (
+        0x37000000374,
+        0x37500000378,
+        0x37a0000037e,
+        0x37f00000380,
+        0x38400000385,
+        0x38600000387,
+        0x3880000038b,
+        0x38c0000038d,
+        0x38e000003a2,
+        0x3a3000003e2,
+        0x3f000000400,
+        0x1d2600001d2b,
+        0x1d5d00001d62,
+        0x1d6600001d6b,
+        0x1dbf00001dc0,
+        0x1f0000001f16,
+        0x1f1800001f1e,
+        0x1f2000001f46,
+        0x1f4800001f4e,
+        0x1f5000001f58,
+        0x1f5900001f5a,
+        0x1f5b00001f5c,
+        0x1f5d00001f5e,
+        0x1f5f00001f7e,
+        0x1f8000001fb5,
+        0x1fb600001fc5,
+        0x1fc600001fd4,
+        0x1fd600001fdc,
+        0x1fdd00001ff0,
+        0x1ff200001ff5,
+        0x1ff600001fff,
+        0x212600002127,
+        0xab650000ab66,
+        0x101400001018f,
+        0x101a0000101a1,
+        0x1d2000001d246,
+    ),
+    'Han': (
+        0x2e8000002e9a,
+        0x2e9b00002ef4,
+        0x2f0000002fd6,
+        0x300500003006,
+        0x300700003008,
+        0x30210000302a,
+        0x30380000303c,
+        0x340000004dc0,
+        0x4e0000009ffd,
+        0xf9000000fa6e,
+        0xfa700000fada,
+        0x16ff000016ff2,
+        0x200000002a6de,
+        0x2a7000002b735,
+        0x2b7400002b81e,
+        0x2b8200002cea2,
+        0x2ceb00002ebe1,
+        0x2f8000002fa1e,
+        0x300000003134b,
+    ),
+    'Hebrew': (
+        0x591000005c8,
+        0x5d0000005eb,
+        0x5ef000005f5,
+        0xfb1d0000fb37,
+        0xfb380000fb3d,
+        0xfb3e0000fb3f,
+        0xfb400000fb42,
+        0xfb430000fb45,
+        0xfb460000fb50,
+    ),
+    'Hiragana': (
+        0x304100003097,
+        0x309d000030a0,
+        0x1b0010001b11f,
+        0x1b1500001b153,
+        0x1f2000001f201,
+    ),
+    'Katakana': (
+        0x30a1000030fb,
+        0x30fd00003100,
+        0x31f000003200,
+        0x32d0000032ff,
+        0x330000003358,
+        0xff660000ff70,
+        0xff710000ff9e,
+        0x1b0000001b001,
+        0x1b1640001b168,
+    ),
+}
+joining_types = {
+    0x600: 85,
+    0x601: 85,
+    0x602: 85,
+    0x603: 85,
+    0x604: 85,
+    0x605: 85,
+    0x608: 85,
+    0x60b: 85,
+    0x620: 68,
+    0x621: 85,
+    0x622: 82,
+    0x623: 82,
+    0x624: 82,
+    0x625: 82,
+    0x626: 68,
+    0x627: 82,
+    0x628: 68,
+    0x629: 82,
+    0x62a: 68,
+    0x62b: 68,
+    0x62c: 68,
+    0x62d: 68,
+    0x62e: 68,
+    0x62f: 82,
+    0x630: 82,
+    0x631: 82,
+    0x632: 82,
+    0x633: 68,
+    0x634: 68,
+    0x635: 68,
+    0x636: 68,
+    0x637: 68,
+    0x638: 68,
+    0x639: 68,
+    0x63a: 68,
+    0x63b: 68,
+    0x63c: 68,
+    0x63d: 68,
+    0x63e: 68,
+    0x63f: 68,
+    0x640: 67,
+    0x641: 68,
+    0x642: 68,
+    0x643: 68,
+    0x644: 68,
+    0x645: 68,
+    0x646: 68,
+    0x647: 68,
+    0x648: 82,
+    0x649: 68,
+    0x64a: 68,
+    0x66e: 68,
+    0x66f: 68,
+    0x671: 82,
+    0x672: 82,
+    0x673: 82,
+    0x674: 85,
+    0x675: 82,
+    0x676: 82,
+    0x677: 82,
+    0x678: 68,
+    0x679: 68,
+    0x67a: 68,
+    0x67b: 68,
+    0x67c: 68,
+    0x67d: 68,
+    0x67e: 68,
+    0x67f: 68,
+    0x680: 68,
+    0x681: 68,
+    0x682: 68,
+    0x683: 68,
+    0x684: 68,
+    0x685: 68,
+    0x686: 68,
+    0x687: 68,
+    0x688: 82,
+    0x689: 82,
+    0x68a: 82,
+    0x68b: 82,
+    0x68c: 82,
+    0x68d: 82,
+    0x68e: 82,
+    0x68f: 82,
+    0x690: 82,
+    0x691: 82,
+    0x692: 82,
+    0x693: 82,
+    0x694: 82,
+    0x695: 82,
+    0x696: 82,
+    0x697: 82,
+    0x698: 82,
+    0x699: 82,
+    0x69a: 68,
+    0x69b: 68,
+    0x69c: 68,
+    0x69d: 68,
+    0x69e: 68,
+    0x69f: 68,
+    0x6a0: 68,
+    0x6a1: 68,
+    0x6a2: 68,
+    0x6a3: 68,
+    0x6a4: 68,
+    0x6a5: 68,
+    0x6a6: 68,
+    0x6a7: 68,
+    0x6a8: 68,
+    0x6a9: 68,
+    0x6aa: 68,
+    0x6ab: 68,
+    0x6ac: 68,
+    0x6ad: 68,
+    0x6ae: 68,
+    0x6af: 68,
+    0x6b0: 68,
+    0x6b1: 68,
+    0x6b2: 68,
+    0x6b3: 68,
+    0x6b4: 68,
+    0x6b5: 68,
+    0x6b6: 68,
+    0x6b7: 68,
+    0x6b8: 68,
+    0x6b9: 68,
+    0x6ba: 68,
+    0x6bb: 68,
+    0x6bc: 68,
+    0x6bd: 68,
+    0x6be: 68,
+    0x6bf: 68,
+    0x6c0: 82,
+    0x6c1: 68,
+    0x6c2: 68,
+    0x6c3: 82,
+    0x6c4: 82,
+    0x6c5: 82,
+    0x6c6: 82,
+    0x6c7: 82,
+    0x6c8: 82,
+    0x6c9: 82,
+    0x6ca: 82,
+    0x6cb: 82,
+    0x6cc: 68,
+    0x6cd: 82,
+    0x6ce: 68,
+    0x6cf: 82,
+    0x6d0: 68,
+    0x6d1: 68,
+    0x6d2: 82,
+    0x6d3: 82,
+    0x6d5: 82,
+    0x6dd: 85,
+    0x6ee: 82,
+    0x6ef: 82,
+    0x6fa: 68,
+    0x6fb: 68,
+    0x6fc: 68,
+    0x6ff: 68,
+    0x70f: 84,
+    0x710: 82,
+    0x712: 68,
+    0x713: 68,
+    0x714: 68,
+    0x715: 82,
+    0x716: 82,
+    0x717: 82,
+    0x718: 82,
+    0x719: 82,
+    0x71a: 68,
+    0x71b: 68,
+    0x71c: 68,
+    0x71d: 68,
+    0x71e: 82,
+    0x71f: 68,
+    0x720: 68,
+    0x721: 68,
+    0x722: 68,
+    0x723: 68,
+    0x724: 68,
+    0x725: 68,
+    0x726: 68,
+    0x727: 68,
+    0x728: 82,
+    0x729: 68,
+    0x72a: 82,
+    0x72b: 68,
+    0x72c: 82,
+    0x72d: 68,
+    0x72e: 68,
+    0x72f: 82,
+    0x74d: 82,
+    0x74e: 68,
+    0x74f: 68,
+    0x750: 68,
+    0x751: 68,
+    0x752: 68,
+    0x753: 68,
+    0x754: 68,
+    0x755: 68,
+    0x756: 68,
+    0x757: 68,
+    0x758: 68,
+    0x759: 82,
+    0x75a: 82,
+    0x75b: 82,
+    0x75c: 68,
+    0x75d: 68,
+    0x75e: 68,
+    0x75f: 68,
+    0x760: 68,
+    0x761: 68,
+    0x762: 68,
+    0x763: 68,
+    0x764: 68,
+    0x765: 68,
+    0x766: 68,
+    0x767: 68,
+    0x768: 68,
+    0x769: 68,
+    0x76a: 68,
+    0x76b: 82,
+    0x76c: 82,
+    0x76d: 68,
+    0x76e: 68,
+    0x76f: 68,
+    0x770: 68,
+    0x771: 82,
+    0x772: 68,
+    0x773: 82,
+    0x774: 82,
+    0x775: 68,
+    0x776: 68,
+    0x777: 68,
+    0x778: 82,
+    0x779: 82,
+    0x77a: 68,
+    0x77b: 68,
+    0x77c: 68,
+    0x77d: 68,
+    0x77e: 68,
+    0x77f: 68,
+    0x7ca: 68,
+    0x7cb: 68,
+    0x7cc: 68,
+    0x7cd: 68,
+    0x7ce: 68,
+    0x7cf: 68,
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+    0x1e94b: 84,
+}
+codepoint_classes = {
+    'PVALID': (
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+        0x610000007b,
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+        0x17a0000017b,
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+        0x1e1000001e2,
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+        0x1ed000001ee,
+        0x1ef000001f1,
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+        0x1f9000001fa,
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+        0x20100000202,
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+        0x22100000222,
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+        0x3f3000003f4,
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+        0x4690000046a,
+        0x46b0000046c,
+        0x46d0000046e,
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/intranges.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/intranges.py
new file mode 100644
index 0000000..fa8a735
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/intranges.py
@@ -0,0 +1,53 @@
+"""
+Given a list of integers, made up of (hopefully) a small number of long runs
+of consecutive integers, compute a representation of the form
+((start1, end1), (start2, end2) ...). Then answer the question "was x present
+in the original list?" in time O(log(# runs)).
+"""
+
+import bisect
+
+def intranges_from_list(list_):
+    """Represent a list of integers as a sequence of ranges:
+    ((start_0, end_0), (start_1, end_1), ...), such that the original
+    integers are exactly those x such that start_i <= x < end_i for some i.
+
+    Ranges are encoded as single integers (start << 32 | end), not as tuples.
+    """
+
+    sorted_list = sorted(list_)
+    ranges = []
+    last_write = -1
+    for i in range(len(sorted_list)):
+        if i+1 < len(sorted_list):
+            if sorted_list[i] == sorted_list[i+1]-1:
+                continue
+        current_range = sorted_list[last_write+1:i+1]
+        ranges.append(_encode_range(current_range[0], current_range[-1] + 1))
+        last_write = i
+
+    return tuple(ranges)
+
+def _encode_range(start, end):
+    return (start << 32) | end
+
+def _decode_range(r):
+    return (r >> 32), (r & ((1 << 32) - 1))
+
+
+def intranges_contain(int_, ranges):
+    """Determine if `int_` falls into one of the ranges in `ranges`."""
+    tuple_ = _encode_range(int_, 0)
+    pos = bisect.bisect_left(ranges, tuple_)
+    # we could be immediately ahead of a tuple (start, end)
+    # with start < int_ <= end
+    if pos > 0:
+        left, right = _decode_range(ranges[pos-1])
+        if left <= int_ < right:
+            return True
+    # or we could be immediately behind a tuple (int_, end)
+    if pos < len(ranges):
+        left, _ = _decode_range(ranges[pos])
+        if left == int_:
+            return True
+    return False
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/package_data.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/package_data.py
new file mode 100644
index 0000000..ce1c521
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/package_data.py
@@ -0,0 +1,2 @@
+__version__ = '2.10'
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/uts46data.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/uts46data.py
new file mode 100644
index 0000000..3766dd4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/idna/uts46data.py
@@ -0,0 +1,8357 @@
+# This file is automatically generated by tools/idna-data
+# vim: set fileencoding=utf-8 :
+
+"""IDNA Mapping Table from UTS46."""
+
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/ipaddress.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/ipaddress.py
new file mode 100644
index 0000000..3e6f9e4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/ipaddress.py
@@ -0,0 +1,2420 @@
+# Copyright 2007 Google Inc.
+#  Licensed to PSF under a Contributor Agreement.
+
+"""A fast, lightweight IPv4/IPv6 manipulation library in Python.
+
+This library is used to create/poke/manipulate IPv4 and IPv6 addresses
+and networks.
+
+"""
+
+from __future__ import unicode_literals
+
+
+import itertools
+import struct
+
+__version__ = '1.0.23'
+
+# Compatibility functions
+_compat_int_types = (int,)
+try:
+    _compat_int_types = (int, long)
+except NameError:
+    pass
+try:
+    _compat_str = unicode
+except NameError:
+    _compat_str = str
+    assert bytes != str
+if b'\0'[0] == 0:  # Python 3 semantics
+    def _compat_bytes_to_byte_vals(byt):
+        return byt
+else:
+    def _compat_bytes_to_byte_vals(byt):
+        return [struct.unpack(b'!B', b)[0] for b in byt]
+try:
+    _compat_int_from_byte_vals = int.from_bytes
+except AttributeError:
+    def _compat_int_from_byte_vals(bytvals, endianess):
+        assert endianess == 'big'
+        res = 0
+        for bv in bytvals:
+            assert isinstance(bv, _compat_int_types)
+            res = (res << 8) + bv
+        return res
+
+
+def _compat_to_bytes(intval, length, endianess):
+    assert isinstance(intval, _compat_int_types)
+    assert endianess == 'big'
+    if length == 4:
+        if intval < 0 or intval >= 2 ** 32:
+            raise struct.error("integer out of range for 'I' format code")
+        return struct.pack(b'!I', intval)
+    elif length == 16:
+        if intval < 0 or intval >= 2 ** 128:
+            raise struct.error("integer out of range for 'QQ' format code")
+        return struct.pack(b'!QQ', intval >> 64, intval & 0xffffffffffffffff)
+    else:
+        raise NotImplementedError()
+
+
+if hasattr(int, 'bit_length'):
+    # Not int.bit_length , since that won't work in 2.7 where long exists
+    def _compat_bit_length(i):
+        return i.bit_length()
+else:
+    def _compat_bit_length(i):
+        for res in itertools.count():
+            if i >> res == 0:
+                return res
+
+
+def _compat_range(start, end, step=1):
+    assert step > 0
+    i = start
+    while i < end:
+        yield i
+        i += step
+
+
+class _TotalOrderingMixin(object):
+    __slots__ = ()
+
+    # Helper that derives the other comparison operations from
+    # __lt__ and __eq__
+    # We avoid functools.total_ordering because it doesn't handle
+    # NotImplemented correctly yet (http://bugs.python.org/issue10042)
+    def __eq__(self, other):
+        raise NotImplementedError
+
+    def __ne__(self, other):
+        equal = self.__eq__(other)
+        if equal is NotImplemented:
+            return NotImplemented
+        return not equal
+
+    def __lt__(self, other):
+        raise NotImplementedError
+
+    def __le__(self, other):
+        less = self.__lt__(other)
+        if less is NotImplemented or not less:
+            return self.__eq__(other)
+        return less
+
+    def __gt__(self, other):
+        less = self.__lt__(other)
+        if less is NotImplemented:
+            return NotImplemented
+        equal = self.__eq__(other)
+        if equal is NotImplemented:
+            return NotImplemented
+        return not (less or equal)
+
+    def __ge__(self, other):
+        less = self.__lt__(other)
+        if less is NotImplemented:
+            return NotImplemented
+        return not less
+
+
+IPV4LENGTH = 32
+IPV6LENGTH = 128
+
+
+class AddressValueError(ValueError):
+    """A Value Error related to the address."""
+
+
+class NetmaskValueError(ValueError):
+    """A Value Error related to the netmask."""
+
+
+def ip_address(address):
+    """Take an IP string/int and return an object of the correct type.
+
+    Args:
+        address: A string or integer, the IP address.  Either IPv4 or
+          IPv6 addresses may be supplied; integers less than 2**32 will
+          be considered to be IPv4 by default.
+
+    Returns:
+        An IPv4Address or IPv6Address object.
+
+    Raises:
+        ValueError: if the *address* passed isn't either a v4 or a v6
+          address
+
+    """
+    try:
+        return IPv4Address(address)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    try:
+        return IPv6Address(address)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    if isinstance(address, bytes):
+        raise AddressValueError(
+            '%r does not appear to be an IPv4 or IPv6 address. '
+            'Did you pass in a bytes (str in Python 2) instead of'
+            ' a unicode object?' % address)
+
+    raise ValueError('%r does not appear to be an IPv4 or IPv6 address' %
+                     address)
+
+
+def ip_network(address, strict=True):
+    """Take an IP string/int and return an object of the correct type.
+
+    Args:
+        address: A string or integer, the IP network.  Either IPv4 or
+          IPv6 networks may be supplied; integers less than 2**32 will
+          be considered to be IPv4 by default.
+
+    Returns:
+        An IPv4Network or IPv6Network object.
+
+    Raises:
+        ValueError: if the string passed isn't either a v4 or a v6
+          address. Or if the network has host bits set.
+
+    """
+    try:
+        return IPv4Network(address, strict)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    try:
+        return IPv6Network(address, strict)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    if isinstance(address, bytes):
+        raise AddressValueError(
+            '%r does not appear to be an IPv4 or IPv6 network. '
+            'Did you pass in a bytes (str in Python 2) instead of'
+            ' a unicode object?' % address)
+
+    raise ValueError('%r does not appear to be an IPv4 or IPv6 network' %
+                     address)
+
+
+def ip_interface(address):
+    """Take an IP string/int and return an object of the correct type.
+
+    Args:
+        address: A string or integer, the IP address.  Either IPv4 or
+          IPv6 addresses may be supplied; integers less than 2**32 will
+          be considered to be IPv4 by default.
+
+    Returns:
+        An IPv4Interface or IPv6Interface object.
+
+    Raises:
+        ValueError: if the string passed isn't either a v4 or a v6
+          address.
+
+    Notes:
+        The IPv?Interface classes describe an Address on a particular
+        Network, so they're basically a combination of both the Address
+        and Network classes.
+
+    """
+    try:
+        return IPv4Interface(address)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    try:
+        return IPv6Interface(address)
+    except (AddressValueError, NetmaskValueError):
+        pass
+
+    raise ValueError('%r does not appear to be an IPv4 or IPv6 interface' %
+                     address)
+
+
+def v4_int_to_packed(address):
+    """Represent an address as 4 packed bytes in network (big-endian) order.
+
+    Args:
+        address: An integer representation of an IPv4 IP address.
+
+    Returns:
+        The integer address packed as 4 bytes in network (big-endian) order.
+
+    Raises:
+        ValueError: If the integer is negative or too large to be an
+          IPv4 IP address.
+
+    """
+    try:
+        return _compat_to_bytes(address, 4, 'big')
+    except (struct.error, OverflowError):
+        raise ValueError("Address negative or too large for IPv4")
+
+
+def v6_int_to_packed(address):
+    """Represent an address as 16 packed bytes in network (big-endian) order.
+
+    Args:
+        address: An integer representation of an IPv6 IP address.
+
+    Returns:
+        The integer address packed as 16 bytes in network (big-endian) order.
+
+    """
+    try:
+        return _compat_to_bytes(address, 16, 'big')
+    except (struct.error, OverflowError):
+        raise ValueError("Address negative or too large for IPv6")
+
+
+def _split_optional_netmask(address):
+    """Helper to split the netmask and raise AddressValueError if needed"""
+    addr = _compat_str(address).split('/')
+    if len(addr) > 2:
+        raise AddressValueError("Only one '/' permitted in %r" % address)
+    return addr
+
+
+def _find_address_range(addresses):
+    """Find a sequence of sorted deduplicated IPv#Address.
+
+    Args:
+        addresses: a list of IPv#Address objects.
+
+    Yields:
+        A tuple containing the first and last IP addresses in the sequence.
+
+    """
+    it = iter(addresses)
+    first = last = next(it)
+    for ip in it:
+        if ip._ip != last._ip + 1:
+            yield first, last
+            first = ip
+        last = ip
+    yield first, last
+
+
+def _count_righthand_zero_bits(number, bits):
+    """Count the number of zero bits on the right hand side.
+
+    Args:
+        number: an integer.
+        bits: maximum number of bits to count.
+
+    Returns:
+        The number of zero bits on the right hand side of the number.
+
+    """
+    if number == 0:
+        return bits
+    return min(bits, _compat_bit_length(~number & (number - 1)))
+
+
+def summarize_address_range(first, last):
+    """Summarize a network range given the first and last IP addresses.
+
+    Example:
+        >>> list(summarize_address_range(IPv4Address('192.0.2.0'),
+        ...                              IPv4Address('192.0.2.130')))
+        ...                                #doctest: +NORMALIZE_WHITESPACE
+        [IPv4Network('192.0.2.0/25'), IPv4Network('192.0.2.128/31'),
+         IPv4Network('192.0.2.130/32')]
+
+    Args:
+        first: the first IPv4Address or IPv6Address in the range.
+        last: the last IPv4Address or IPv6Address in the range.
+
+    Returns:
+        An iterator of the summarized IPv(4|6) network objects.
+
+    Raise:
+        TypeError:
+            If the first and last objects are not IP addresses.
+            If the first and last objects are not the same version.
+        ValueError:
+            If the last object is not greater than the first.
+            If the version of the first address is not 4 or 6.
+
+    """
+    if (not (isinstance(first, _BaseAddress) and
+             isinstance(last, _BaseAddress))):
+        raise TypeError('first and last must be IP addresses, not networks')
+    if first.version != last.version:
+        raise TypeError("%s and %s are not of the same version" % (
+                        first, last))
+    if first > last:
+        raise ValueError('last IP address must be greater than first')
+
+    if first.version == 4:
+        ip = IPv4Network
+    elif first.version == 6:
+        ip = IPv6Network
+    else:
+        raise ValueError('unknown IP version')
+
+    ip_bits = first._max_prefixlen
+    first_int = first._ip
+    last_int = last._ip
+    while first_int <= last_int:
+        nbits = min(_count_righthand_zero_bits(first_int, ip_bits),
+                    _compat_bit_length(last_int - first_int + 1) - 1)
+        net = ip((first_int, ip_bits - nbits))
+        yield net
+        first_int += 1 << nbits
+        if first_int - 1 == ip._ALL_ONES:
+            break
+
+
+def _collapse_addresses_internal(addresses):
+    """Loops through the addresses, collapsing concurrent netblocks.
+
+    Example:
+
+        ip1 = IPv4Network('192.0.2.0/26')
+        ip2 = IPv4Network('192.0.2.64/26')
+        ip3 = IPv4Network('192.0.2.128/26')
+        ip4 = IPv4Network('192.0.2.192/26')
+
+        _collapse_addresses_internal([ip1, ip2, ip3, ip4]) ->
+          [IPv4Network('192.0.2.0/24')]
+
+        This shouldn't be called directly; it is called via
+          collapse_addresses([]).
+
+    Args:
+        addresses: A list of IPv4Network's or IPv6Network's
+
+    Returns:
+        A list of IPv4Network's or IPv6Network's depending on what we were
+        passed.
+
+    """
+    # First merge
+    to_merge = list(addresses)
+    subnets = {}
+    while to_merge:
+        net = to_merge.pop()
+        supernet = net.supernet()
+        existing = subnets.get(supernet)
+        if existing is None:
+            subnets[supernet] = net
+        elif existing != net:
+            # Merge consecutive subnets
+            del subnets[supernet]
+            to_merge.append(supernet)
+    # Then iterate over resulting networks, skipping subsumed subnets
+    last = None
+    for net in sorted(subnets.values()):
+        if last is not None:
+            # Since they are sorted,
+            # last.network_address <= net.network_address is a given.
+            if last.broadcast_address >= net.broadcast_address:
+                continue
+        yield net
+        last = net
+
+
+def collapse_addresses(addresses):
+    """Collapse a list of IP objects.
+
+    Example:
+        collapse_addresses([IPv4Network('192.0.2.0/25'),
+                            IPv4Network('192.0.2.128/25')]) ->
+                           [IPv4Network('192.0.2.0/24')]
+
+    Args:
+        addresses: An iterator of IPv4Network or IPv6Network objects.
+
+    Returns:
+        An iterator of the collapsed IPv(4|6)Network objects.
+
+    Raises:
+        TypeError: If passed a list of mixed version objects.
+
+    """
+    addrs = []
+    ips = []
+    nets = []
+
+    # split IP addresses and networks
+    for ip in addresses:
+        if isinstance(ip, _BaseAddress):
+            if ips and ips[-1]._version != ip._version:
+                raise TypeError("%s and %s are not of the same version" % (
+                                ip, ips[-1]))
+            ips.append(ip)
+        elif ip._prefixlen == ip._max_prefixlen:
+            if ips and ips[-1]._version != ip._version:
+                raise TypeError("%s and %s are not of the same version" % (
+                                ip, ips[-1]))
+            try:
+                ips.append(ip.ip)
+            except AttributeError:
+                ips.append(ip.network_address)
+        else:
+            if nets and nets[-1]._version != ip._version:
+                raise TypeError("%s and %s are not of the same version" % (
+                                ip, nets[-1]))
+            nets.append(ip)
+
+    # sort and dedup
+    ips = sorted(set(ips))
+
+    # find consecutive address ranges in the sorted sequence and summarize them
+    if ips:
+        for first, last in _find_address_range(ips):
+            addrs.extend(summarize_address_range(first, last))
+
+    return _collapse_addresses_internal(addrs + nets)
+
+
+def get_mixed_type_key(obj):
+    """Return a key suitable for sorting between networks and addresses.
+
+    Address and Network objects are not sortable by default; they're
+    fundamentally different so the expression
+
+        IPv4Address('192.0.2.0') <= IPv4Network('192.0.2.0/24')
+
+    doesn't make any sense.  There are some times however, where you may wish
+    to have ipaddress sort these for you anyway. If you need to do this, you
+    can use this function as the key= argument to sorted().
+
+    Args:
+      obj: either a Network or Address object.
+    Returns:
+      appropriate key.
+
+    """
+    if isinstance(obj, _BaseNetwork):
+        return obj._get_networks_key()
+    elif isinstance(obj, _BaseAddress):
+        return obj._get_address_key()
+    return NotImplemented
+
+
+class _IPAddressBase(_TotalOrderingMixin):
+
+    """The mother class."""
+
+    __slots__ = ()
+
+    @property
+    def exploded(self):
+        """Return the longhand version of the IP address as a string."""
+        return self._explode_shorthand_ip_string()
+
+    @property
+    def compressed(self):
+        """Return the shorthand version of the IP address as a string."""
+        return _compat_str(self)
+
+    @property
+    def reverse_pointer(self):
+        """The name of the reverse DNS pointer for the IP address, e.g.:
+            >>> ipaddress.ip_address("127.0.0.1").reverse_pointer
+            '1.0.0.127.in-addr.arpa'
+            >>> ipaddress.ip_address("2001:db8::1").reverse_pointer
+            '1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa'
+
+        """
+        return self._reverse_pointer()
+
+    @property
+    def version(self):
+        msg = '%200s has no version specified' % (type(self),)
+        raise NotImplementedError(msg)
+
+    def _check_int_address(self, address):
+        if address < 0:
+            msg = "%d (< 0) is not permitted as an IPv%d address"
+            raise AddressValueError(msg % (address, self._version))
+        if address > self._ALL_ONES:
+            msg = "%d (>= 2**%d) is not permitted as an IPv%d address"
+            raise AddressValueError(msg % (address, self._max_prefixlen,
+                                           self._version))
+
+    def _check_packed_address(self, address, expected_len):
+        address_len = len(address)
+        if address_len != expected_len:
+            msg = (
+                '%r (len %d != %d) is not permitted as an IPv%d address. '
+                'Did you pass in a bytes (str in Python 2) instead of'
+                ' a unicode object?')
+            raise AddressValueError(msg % (address, address_len,
+                                           expected_len, self._version))
+
+    @classmethod
+    def _ip_int_from_prefix(cls, prefixlen):
+        """Turn the prefix length into a bitwise netmask
+
+        Args:
+            prefixlen: An integer, the prefix length.
+
+        Returns:
+            An integer.
+
+        """
+        return cls._ALL_ONES ^ (cls._ALL_ONES >> prefixlen)
+
+    @classmethod
+    def _prefix_from_ip_int(cls, ip_int):
+        """Return prefix length from the bitwise netmask.
+
+        Args:
+            ip_int: An integer, the netmask in expanded bitwise format
+
+        Returns:
+            An integer, the prefix length.
+
+        Raises:
+            ValueError: If the input intermingles zeroes & ones
+        """
+        trailing_zeroes = _count_righthand_zero_bits(ip_int,
+                                                     cls._max_prefixlen)
+        prefixlen = cls._max_prefixlen - trailing_zeroes
+        leading_ones = ip_int >> trailing_zeroes
+        all_ones = (1 << prefixlen) - 1
+        if leading_ones != all_ones:
+            byteslen = cls._max_prefixlen // 8
+            details = _compat_to_bytes(ip_int, byteslen, 'big')
+            msg = 'Netmask pattern %r mixes zeroes & ones'
+            raise ValueError(msg % details)
+        return prefixlen
+
+    @classmethod
+    def _report_invalid_netmask(cls, netmask_str):
+        msg = '%r is not a valid netmask' % netmask_str
+        raise NetmaskValueError(msg)
+
+    @classmethod
+    def _prefix_from_prefix_string(cls, prefixlen_str):
+        """Return prefix length from a numeric string
+
+        Args:
+            prefixlen_str: The string to be converted
+
+        Returns:
+            An integer, the prefix length.
+
+        Raises:
+            NetmaskValueError: If the input is not a valid netmask
+        """
+        # int allows a leading +/- as well as surrounding whitespace,
+        # so we ensure that isn't the case
+        if not _BaseV4._DECIMAL_DIGITS.issuperset(prefixlen_str):
+            cls._report_invalid_netmask(prefixlen_str)
+        try:
+            prefixlen = int(prefixlen_str)
+        except ValueError:
+            cls._report_invalid_netmask(prefixlen_str)
+        if not (0 <= prefixlen <= cls._max_prefixlen):
+            cls._report_invalid_netmask(prefixlen_str)
+        return prefixlen
+
+    @classmethod
+    def _prefix_from_ip_string(cls, ip_str):
+        """Turn a netmask/hostmask string into a prefix length
+
+        Args:
+            ip_str: The netmask/hostmask to be converted
+
+        Returns:
+            An integer, the prefix length.
+
+        Raises:
+            NetmaskValueError: If the input is not a valid netmask/hostmask
+        """
+        # Parse the netmask/hostmask like an IP address.
+        try:
+            ip_int = cls._ip_int_from_string(ip_str)
+        except AddressValueError:
+            cls._report_invalid_netmask(ip_str)
+
+        # Try matching a netmask (this would be /1*0*/ as a bitwise regexp).
+        # Note that the two ambiguous cases (all-ones and all-zeroes) are
+        # treated as netmasks.
+        try:
+            return cls._prefix_from_ip_int(ip_int)
+        except ValueError:
+            pass
+
+        # Invert the bits, and try matching a /0+1+/ hostmask instead.
+        ip_int ^= cls._ALL_ONES
+        try:
+            return cls._prefix_from_ip_int(ip_int)
+        except ValueError:
+            cls._report_invalid_netmask(ip_str)
+
+    def __reduce__(self):
+        return self.__class__, (_compat_str(self),)
+
+
+class _BaseAddress(_IPAddressBase):
+
+    """A generic IP object.
+
+    This IP class contains the version independent methods which are
+    used by single IP addresses.
+    """
+
+    __slots__ = ()
+
+    def __int__(self):
+        return self._ip
+
+    def __eq__(self, other):
+        try:
+            return (self._ip == other._ip and
+                    self._version == other._version)
+        except AttributeError:
+            return NotImplemented
+
+    def __lt__(self, other):
+        if not isinstance(other, _IPAddressBase):
+            return NotImplemented
+        if not isinstance(other, _BaseAddress):
+            raise TypeError('%s and %s are not of the same type' % (
+                self, other))
+        if self._version != other._version:
+            raise TypeError('%s and %s are not of the same version' % (
+                self, other))
+        if self._ip != other._ip:
+            return self._ip < other._ip
+        return False
+
+    # Shorthand for Integer addition and subtraction. This is not
+    # meant to ever support addition/subtraction of addresses.
+    def __add__(self, other):
+        if not isinstance(other, _compat_int_types):
+            return NotImplemented
+        return self.__class__(int(self) + other)
+
+    def __sub__(self, other):
+        if not isinstance(other, _compat_int_types):
+            return NotImplemented
+        return self.__class__(int(self) - other)
+
+    def __repr__(self):
+        return '%s(%r)' % (self.__class__.__name__, _compat_str(self))
+
+    def __str__(self):
+        return _compat_str(self._string_from_ip_int(self._ip))
+
+    def __hash__(self):
+        return hash(hex(int(self._ip)))
+
+    def _get_address_key(self):
+        return (self._version, self)
+
+    def __reduce__(self):
+        return self.__class__, (self._ip,)
+
+
+class _BaseNetwork(_IPAddressBase):
+
+    """A generic IP network object.
+
+    This IP class contains the version independent methods which are
+    used by networks.
+
+    """
+    def __init__(self, address):
+        self._cache = {}
+
+    def __repr__(self):
+        return '%s(%r)' % (self.__class__.__name__, _compat_str(self))
+
+    def __str__(self):
+        return '%s/%d' % (self.network_address, self.prefixlen)
+
+    def hosts(self):
+        """Generate Iterator over usable hosts in a network.
+
+        This is like __iter__ except it doesn't return the network
+        or broadcast addresses.
+
+        """
+        network = int(self.network_address)
+        broadcast = int(self.broadcast_address)
+        for x in _compat_range(network + 1, broadcast):
+            yield self._address_class(x)
+
+    def __iter__(self):
+        network = int(self.network_address)
+        broadcast = int(self.broadcast_address)
+        for x in _compat_range(network, broadcast + 1):
+            yield self._address_class(x)
+
+    def __getitem__(self, n):
+        network = int(self.network_address)
+        broadcast = int(self.broadcast_address)
+        if n >= 0:
+            if network + n > broadcast:
+                raise IndexError('address out of range')
+            return self._address_class(network + n)
+        else:
+            n += 1
+            if broadcast + n < network:
+                raise IndexError('address out of range')
+            return self._address_class(broadcast + n)
+
+    def __lt__(self, other):
+        if not isinstance(other, _IPAddressBase):
+            return NotImplemented
+        if not isinstance(other, _BaseNetwork):
+            raise TypeError('%s and %s are not of the same type' % (
+                            self, other))
+        if self._version != other._version:
+            raise TypeError('%s and %s are not of the same version' % (
+                            self, other))
+        if self.network_address != other.network_address:
+            return self.network_address < other.network_address
+        if self.netmask != other.netmask:
+            return self.netmask < other.netmask
+        return False
+
+    def __eq__(self, other):
+        try:
+            return (self._version == other._version and
+                    self.network_address == other.network_address and
+                    int(self.netmask) == int(other.netmask))
+        except AttributeError:
+            return NotImplemented
+
+    def __hash__(self):
+        return hash(int(self.network_address) ^ int(self.netmask))
+
+    def __contains__(self, other):
+        # always false if one is v4 and the other is v6.
+        if self._version != other._version:
+            return False
+        # dealing with another network.
+        if isinstance(other, _BaseNetwork):
+            return False
+        # dealing with another address
+        else:
+            # address
+            return (int(self.network_address) <= int(other._ip) <=
+                    int(self.broadcast_address))
+
+    def overlaps(self, other):
+        """Tell if self is partly contained in other."""
+        return self.network_address in other or (
+            self.broadcast_address in other or (
+                other.network_address in self or (
+                    other.broadcast_address in self)))
+
+    @property
+    def broadcast_address(self):
+        x = self._cache.get('broadcast_address')
+        if x is None:
+            x = self._address_class(int(self.network_address) |
+                                    int(self.hostmask))
+            self._cache['broadcast_address'] = x
+        return x
+
+    @property
+    def hostmask(self):
+        x = self._cache.get('hostmask')
+        if x is None:
+            x = self._address_class(int(self.netmask) ^ self._ALL_ONES)
+            self._cache['hostmask'] = x
+        return x
+
+    @property
+    def with_prefixlen(self):
+        return '%s/%d' % (self.network_address, self._prefixlen)
+
+    @property
+    def with_netmask(self):
+        return '%s/%s' % (self.network_address, self.netmask)
+
+    @property
+    def with_hostmask(self):
+        return '%s/%s' % (self.network_address, self.hostmask)
+
+    @property
+    def num_addresses(self):
+        """Number of hosts in the current subnet."""
+        return int(self.broadcast_address) - int(self.network_address) + 1
+
+    @property
+    def _address_class(self):
+        # Returning bare address objects (rather than interfaces) allows for
+        # more consistent behaviour across the network address, broadcast
+        # address and individual host addresses.
+        msg = '%200s has no associated address class' % (type(self),)
+        raise NotImplementedError(msg)
+
+    @property
+    def prefixlen(self):
+        return self._prefixlen
+
+    def address_exclude(self, other):
+        """Remove an address from a larger block.
+
+        For example:
+
+            addr1 = ip_network('192.0.2.0/28')
+            addr2 = ip_network('192.0.2.1/32')
+            list(addr1.address_exclude(addr2)) =
+                [IPv4Network('192.0.2.0/32'), IPv4Network('192.0.2.2/31'),
+                 IPv4Network('192.0.2.4/30'), IPv4Network('192.0.2.8/29')]
+
+        or IPv6:
+
+            addr1 = ip_network('2001:db8::1/32')
+            addr2 = ip_network('2001:db8::1/128')
+            list(addr1.address_exclude(addr2)) =
+                [ip_network('2001:db8::1/128'),
+                 ip_network('2001:db8::2/127'),
+                 ip_network('2001:db8::4/126'),
+                 ip_network('2001:db8::8/125'),
+                 ...
+                 ip_network('2001:db8:8000::/33')]
+
+        Args:
+            other: An IPv4Network or IPv6Network object of the same type.
+
+        Returns:
+            An iterator of the IPv(4|6)Network objects which is self
+            minus other.
+
+        Raises:
+            TypeError: If self and other are of differing address
+              versions, or if other is not a network object.
+            ValueError: If other is not completely contained by self.
+
+        """
+        if not self._version == other._version:
+            raise TypeError("%s and %s are not of the same version" % (
+                            self, other))
+
+        if not isinstance(other, _BaseNetwork):
+            raise TypeError("%s is not a network object" % other)
+
+        if not other.subnet_of(self):
+            raise ValueError('%s not contained in %s' % (other, self))
+        if other == self:
+            return
+
+        # Make sure we're comparing the network of other.
+        other = other.__class__('%s/%s' % (other.network_address,
+                                           other.prefixlen))
+
+        s1, s2 = self.subnets()
+        while s1 != other and s2 != other:
+            if other.subnet_of(s1):
+                yield s2
+                s1, s2 = s1.subnets()
+            elif other.subnet_of(s2):
+                yield s1
+                s1, s2 = s2.subnets()
+            else:
+                # If we got here, there's a bug somewhere.
+                raise AssertionError('Error performing exclusion: '
+                                     's1: %s s2: %s other: %s' %
+                                     (s1, s2, other))
+        if s1 == other:
+            yield s2
+        elif s2 == other:
+            yield s1
+        else:
+            # If we got here, there's a bug somewhere.
+            raise AssertionError('Error performing exclusion: '
+                                 's1: %s s2: %s other: %s' %
+                                 (s1, s2, other))
+
+    def compare_networks(self, other):
+        """Compare two IP objects.
+
+        This is only concerned about the comparison of the integer
+        representation of the network addresses.  This means that the
+        host bits aren't considered at all in this method.  If you want
+        to compare host bits, you can easily enough do a
+        'HostA._ip < HostB._ip'
+
+        Args:
+            other: An IP object.
+
+        Returns:
+            If the IP versions of self and other are the same, returns:
+
+            -1 if self < other:
+              eg: IPv4Network('192.0.2.0/25') < IPv4Network('192.0.2.128/25')
+              IPv6Network('2001:db8::1000/124') <
+                  IPv6Network('2001:db8::2000/124')
+            0 if self == other
+              eg: IPv4Network('192.0.2.0/24') == IPv4Network('192.0.2.0/24')
+              IPv6Network('2001:db8::1000/124') ==
+                  IPv6Network('2001:db8::1000/124')
+            1 if self > other
+              eg: IPv4Network('192.0.2.128/25') > IPv4Network('192.0.2.0/25')
+                  IPv6Network('2001:db8::2000/124') >
+                      IPv6Network('2001:db8::1000/124')
+
+          Raises:
+              TypeError if the IP versions are different.
+
+        """
+        # does this need to raise a ValueError?
+        if self._version != other._version:
+            raise TypeError('%s and %s are not of the same type' % (
+                            self, other))
+        # self._version == other._version below here:
+        if self.network_address < other.network_address:
+            return -1
+        if self.network_address > other.network_address:
+            return 1
+        # self.network_address == other.network_address below here:
+        if self.netmask < other.netmask:
+            return -1
+        if self.netmask > other.netmask:
+            return 1
+        return 0
+
+    def _get_networks_key(self):
+        """Network-only key function.
+
+        Returns an object that identifies this address' network and
+        netmask. This function is a suitable "key" argument for sorted()
+        and list.sort().
+
+        """
+        return (self._version, self.network_address, self.netmask)
+
+    def subnets(self, prefixlen_diff=1, new_prefix=None):
+        """The subnets which join to make the current subnet.
+
+        In the case that self contains only one IP
+        (self._prefixlen == 32 for IPv4 or self._prefixlen == 128
+        for IPv6), yield an iterator with just ourself.
+
+        Args:
+            prefixlen_diff: An integer, the amount the prefix length
+              should be increased by. This should not be set if
+              new_prefix is also set.
+            new_prefix: The desired new prefix length. This must be a
+              larger number (smaller prefix) than the existing prefix.
+              This should not be set if prefixlen_diff is also set.
+
+        Returns:
+            An iterator of IPv(4|6) objects.
+
+        Raises:
+            ValueError: The prefixlen_diff is too small or too large.
+                OR
+            prefixlen_diff and new_prefix are both set or new_prefix
+              is a smaller number than the current prefix (smaller
+              number means a larger network)
+
+        """
+        if self._prefixlen == self._max_prefixlen:
+            yield self
+            return
+
+        if new_prefix is not None:
+            if new_prefix < self._prefixlen:
+                raise ValueError('new prefix must be longer')
+            if prefixlen_diff != 1:
+                raise ValueError('cannot set prefixlen_diff and new_prefix')
+            prefixlen_diff = new_prefix - self._prefixlen
+
+        if prefixlen_diff < 0:
+            raise ValueError('prefix length diff must be > 0')
+        new_prefixlen = self._prefixlen + prefixlen_diff
+
+        if new_prefixlen > self._max_prefixlen:
+            raise ValueError(
+                'prefix length diff %d is invalid for netblock %s' % (
+                    new_prefixlen, self))
+
+        start = int(self.network_address)
+        end = int(self.broadcast_address) + 1
+        step = (int(self.hostmask) + 1) >> prefixlen_diff
+        for new_addr in _compat_range(start, end, step):
+            current = self.__class__((new_addr, new_prefixlen))
+            yield current
+
+    def supernet(self, prefixlen_diff=1, new_prefix=None):
+        """The supernet containing the current network.
+
+        Args:
+            prefixlen_diff: An integer, the amount the prefix length of
+              the network should be decreased by.  For example, given a
+              /24 network and a prefixlen_diff of 3, a supernet with a
+              /21 netmask is returned.
+
+        Returns:
+            An IPv4 network object.
+
+        Raises:
+            ValueError: If self.prefixlen - prefixlen_diff < 0. I.e., you have
+              a negative prefix length.
+                OR
+            If prefixlen_diff and new_prefix are both set or new_prefix is a
+              larger number than the current prefix (larger number means a
+              smaller network)
+
+        """
+        if self._prefixlen == 0:
+            return self
+
+        if new_prefix is not None:
+            if new_prefix > self._prefixlen:
+                raise ValueError('new prefix must be shorter')
+            if prefixlen_diff != 1:
+                raise ValueError('cannot set prefixlen_diff and new_prefix')
+            prefixlen_diff = self._prefixlen - new_prefix
+
+        new_prefixlen = self.prefixlen - prefixlen_diff
+        if new_prefixlen < 0:
+            raise ValueError(
+                'current prefixlen is %d, cannot have a prefixlen_diff of %d' %
+                (self.prefixlen, prefixlen_diff))
+        return self.__class__((
+            int(self.network_address) & (int(self.netmask) << prefixlen_diff),
+            new_prefixlen))
+
+    @property
+    def is_multicast(self):
+        """Test if the address is reserved for multicast use.
+
+        Returns:
+            A boolean, True if the address is a multicast address.
+            See RFC 2373 2.7 for details.
+
+        """
+        return (self.network_address.is_multicast and
+                self.broadcast_address.is_multicast)
+
+    @staticmethod
+    def _is_subnet_of(a, b):
+        try:
+            # Always false if one is v4 and the other is v6.
+            if a._version != b._version:
+                raise TypeError(
+                    "%s and %s are not of the same version" % (a, b))
+            return (b.network_address <= a.network_address and
+                    b.broadcast_address >= a.broadcast_address)
+        except AttributeError:
+            raise TypeError("Unable to test subnet containment "
+                            "between %s and %s" % (a, b))
+
+    def subnet_of(self, other):
+        """Return True if this network is a subnet of other."""
+        return self._is_subnet_of(self, other)
+
+    def supernet_of(self, other):
+        """Return True if this network is a supernet of other."""
+        return self._is_subnet_of(other, self)
+
+    @property
+    def is_reserved(self):
+        """Test if the address is otherwise IETF reserved.
+
+        Returns:
+            A boolean, True if the address is within one of the
+            reserved IPv6 Network ranges.
+
+        """
+        return (self.network_address.is_reserved and
+                self.broadcast_address.is_reserved)
+
+    @property
+    def is_link_local(self):
+        """Test if the address is reserved for link-local.
+
+        Returns:
+            A boolean, True if the address is reserved per RFC 4291.
+
+        """
+        return (self.network_address.is_link_local and
+                self.broadcast_address.is_link_local)
+
+    @property
+    def is_private(self):
+        """Test if this address is allocated for private networks.
+
+        Returns:
+            A boolean, True if the address is reserved per
+            iana-ipv4-special-registry or iana-ipv6-special-registry.
+
+        """
+        return (self.network_address.is_private and
+                self.broadcast_address.is_private)
+
+    @property
+    def is_global(self):
+        """Test if this address is allocated for public networks.
+
+        Returns:
+            A boolean, True if the address is not reserved per
+            iana-ipv4-special-registry or iana-ipv6-special-registry.
+
+        """
+        return not self.is_private
+
+    @property
+    def is_unspecified(self):
+        """Test if the address is unspecified.
+
+        Returns:
+            A boolean, True if this is the unspecified address as defined in
+            RFC 2373 2.5.2.
+
+        """
+        return (self.network_address.is_unspecified and
+                self.broadcast_address.is_unspecified)
+
+    @property
+    def is_loopback(self):
+        """Test if the address is a loopback address.
+
+        Returns:
+            A boolean, True if the address is a loopback address as defined in
+            RFC 2373 2.5.3.
+
+        """
+        return (self.network_address.is_loopback and
+                self.broadcast_address.is_loopback)
+
+
+class _BaseV4(object):
+
+    """Base IPv4 object.
+
+    The following methods are used by IPv4 objects in both single IP
+    addresses and networks.
+
+    """
+
+    __slots__ = ()
+    _version = 4
+    # Equivalent to 255.255.255.255 or 32 bits of 1's.
+    _ALL_ONES = (2 ** IPV4LENGTH) - 1
+    _DECIMAL_DIGITS = frozenset('0123456789')
+
+    # the valid octets for host and netmasks. only useful for IPv4.
+    _valid_mask_octets = frozenset([255, 254, 252, 248, 240, 224, 192, 128, 0])
+
+    _max_prefixlen = IPV4LENGTH
+    # There are only a handful of valid v4 netmasks, so we cache them all
+    # when constructed (see _make_netmask()).
+    _netmask_cache = {}
+
+    def _explode_shorthand_ip_string(self):
+        return _compat_str(self)
+
+    @classmethod
+    def _make_netmask(cls, arg):
+        """Make a (netmask, prefix_len) tuple from the given argument.
+
+        Argument can be:
+        - an integer (the prefix length)
+        - a string representing the prefix length (e.g. "24")
+        - a string representing the prefix netmask (e.g. "255.255.255.0")
+        """
+        if arg not in cls._netmask_cache:
+            if isinstance(arg, _compat_int_types):
+                prefixlen = arg
+            else:
+                try:
+                    # Check for a netmask in prefix length form
+                    prefixlen = cls._prefix_from_prefix_string(arg)
+                except NetmaskValueError:
+                    # Check for a netmask or hostmask in dotted-quad form.
+                    # This may raise NetmaskValueError.
+                    prefixlen = cls._prefix_from_ip_string(arg)
+            netmask = IPv4Address(cls._ip_int_from_prefix(prefixlen))
+            cls._netmask_cache[arg] = netmask, prefixlen
+        return cls._netmask_cache[arg]
+
+    @classmethod
+    def _ip_int_from_string(cls, ip_str):
+        """Turn the given IP string into an integer for comparison.
+
+        Args:
+            ip_str: A string, the IP ip_str.
+
+        Returns:
+            The IP ip_str as an integer.
+
+        Raises:
+            AddressValueError: if ip_str isn't a valid IPv4 Address.
+
+        """
+        if not ip_str:
+            raise AddressValueError('Address cannot be empty')
+
+        octets = ip_str.split('.')
+        if len(octets) != 4:
+            raise AddressValueError("Expected 4 octets in %r" % ip_str)
+
+        try:
+            return _compat_int_from_byte_vals(
+                map(cls._parse_octet, octets), 'big')
+        except ValueError as exc:
+            raise AddressValueError("%s in %r" % (exc, ip_str))
+
+    @classmethod
+    def _parse_octet(cls, octet_str):
+        """Convert a decimal octet into an integer.
+
+        Args:
+            octet_str: A string, the number to parse.
+
+        Returns:
+            The octet as an integer.
+
+        Raises:
+            ValueError: if the octet isn't strictly a decimal from [0..255].
+
+        """
+        if not octet_str:
+            raise ValueError("Empty octet not permitted")
+        # Whitelist the characters, since int() allows a lot of bizarre stuff.
+        if not cls._DECIMAL_DIGITS.issuperset(octet_str):
+            msg = "Only decimal digits permitted in %r"
+            raise ValueError(msg % octet_str)
+        # We do the length check second, since the invalid character error
+        # is likely to be more informative for the user
+        if len(octet_str) > 3:
+            msg = "At most 3 characters permitted in %r"
+            raise ValueError(msg % octet_str)
+        # Convert to integer (we know digits are legal)
+        octet_int = int(octet_str, 10)
+        # Any octets that look like they *might* be written in octal,
+        # and which don't look exactly the same in both octal and
+        # decimal are rejected as ambiguous
+        if octet_int > 7 and octet_str[0] == '0':
+            msg = "Ambiguous (octal/decimal) value in %r not permitted"
+            raise ValueError(msg % octet_str)
+        if octet_int > 255:
+            raise ValueError("Octet %d (> 255) not permitted" % octet_int)
+        return octet_int
+
+    @classmethod
+    def _string_from_ip_int(cls, ip_int):
+        """Turns a 32-bit integer into dotted decimal notation.
+
+        Args:
+            ip_int: An integer, the IP address.
+
+        Returns:
+            The IP address as a string in dotted decimal notation.
+
+        """
+        return '.'.join(_compat_str(struct.unpack(b'!B', b)[0]
+                                    if isinstance(b, bytes)
+                                    else b)
+                        for b in _compat_to_bytes(ip_int, 4, 'big'))
+
+    def _is_hostmask(self, ip_str):
+        """Test if the IP string is a hostmask (rather than a netmask).
+
+        Args:
+            ip_str: A string, the potential hostmask.
+
+        Returns:
+            A boolean, True if the IP string is a hostmask.
+
+        """
+        bits = ip_str.split('.')
+        try:
+            parts = [x for x in map(int, bits) if x in self._valid_mask_octets]
+        except ValueError:
+            return False
+        if len(parts) != len(bits):
+            return False
+        if parts[0] < parts[-1]:
+            return True
+        return False
+
+    def _reverse_pointer(self):
+        """Return the reverse DNS pointer name for the IPv4 address.
+
+        This implements the method described in RFC1035 3.5.
+
+        """
+        reverse_octets = _compat_str(self).split('.')[::-1]
+        return '.'.join(reverse_octets) + '.in-addr.arpa'
+
+    @property
+    def max_prefixlen(self):
+        return self._max_prefixlen
+
+    @property
+    def version(self):
+        return self._version
+
+
+class IPv4Address(_BaseV4, _BaseAddress):
+
+    """Represent and manipulate single IPv4 Addresses."""
+
+    __slots__ = ('_ip', '__weakref__')
+
+    def __init__(self, address):
+
+        """
+        Args:
+            address: A string or integer representing the IP
+
+              Additionally, an integer can be passed, so
+              IPv4Address('192.0.2.1') == IPv4Address(3221225985).
+              or, more generally
+              IPv4Address(int(IPv4Address('192.0.2.1'))) ==
+                IPv4Address('192.0.2.1')
+
+        Raises:
+            AddressValueError: If ipaddress isn't a valid IPv4 address.
+
+        """
+        # Efficient constructor from integer.
+        if isinstance(address, _compat_int_types):
+            self._check_int_address(address)
+            self._ip = address
+            return
+
+        # Constructing from a packed address
+        if isinstance(address, bytes):
+            self._check_packed_address(address, 4)
+            bvs = _compat_bytes_to_byte_vals(address)
+            self._ip = _compat_int_from_byte_vals(bvs, 'big')
+            return
+
+        # Assume input argument to be string or any object representation
+        # which converts into a formatted IP string.
+        addr_str = _compat_str(address)
+        if '/' in addr_str:
+            raise AddressValueError("Unexpected '/' in %r" % address)
+        self._ip = self._ip_int_from_string(addr_str)
+
+    @property
+    def packed(self):
+        """The binary representation of this address."""
+        return v4_int_to_packed(self._ip)
+
+    @property
+    def is_reserved(self):
+        """Test if the address is otherwise IETF reserved.
+
+         Returns:
+             A boolean, True if the address is within the
+             reserved IPv4 Network range.
+
+        """
+        return self in self._constants._reserved_network
+
+    @property
+    def is_private(self):
+        """Test if this address is allocated for private networks.
+
+        Returns:
+            A boolean, True if the address is reserved per
+            iana-ipv4-special-registry.
+
+        """
+        return any(self in net for net in self._constants._private_networks)
+
+    @property
+    def is_global(self):
+        return (
+            self not in self._constants._public_network and
+            not self.is_private)
+
+    @property
+    def is_multicast(self):
+        """Test if the address is reserved for multicast use.
+
+        Returns:
+            A boolean, True if the address is multicast.
+            See RFC 3171 for details.
+
+        """
+        return self in self._constants._multicast_network
+
+    @property
+    def is_unspecified(self):
+        """Test if the address is unspecified.
+
+        Returns:
+            A boolean, True if this is the unspecified address as defined in
+            RFC 5735 3.
+
+        """
+        return self == self._constants._unspecified_address
+
+    @property
+    def is_loopback(self):
+        """Test if the address is a loopback address.
+
+        Returns:
+            A boolean, True if the address is a loopback per RFC 3330.
+
+        """
+        return self in self._constants._loopback_network
+
+    @property
+    def is_link_local(self):
+        """Test if the address is reserved for link-local.
+
+        Returns:
+            A boolean, True if the address is link-local per RFC 3927.
+
+        """
+        return self in self._constants._linklocal_network
+
+
+class IPv4Interface(IPv4Address):
+
+    def __init__(self, address):
+        if isinstance(address, (bytes, _compat_int_types)):
+            IPv4Address.__init__(self, address)
+            self.network = IPv4Network(self._ip)
+            self._prefixlen = self._max_prefixlen
+            return
+
+        if isinstance(address, tuple):
+            IPv4Address.__init__(self, address[0])
+            if len(address) > 1:
+                self._prefixlen = int(address[1])
+            else:
+                self._prefixlen = self._max_prefixlen
+
+            self.network = IPv4Network(address, strict=False)
+            self.netmask = self.network.netmask
+            self.hostmask = self.network.hostmask
+            return
+
+        addr = _split_optional_netmask(address)
+        IPv4Address.__init__(self, addr[0])
+
+        self.network = IPv4Network(address, strict=False)
+        self._prefixlen = self.network._prefixlen
+
+        self.netmask = self.network.netmask
+        self.hostmask = self.network.hostmask
+
+    def __str__(self):
+        return '%s/%d' % (self._string_from_ip_int(self._ip),
+                          self.network.prefixlen)
+
+    def __eq__(self, other):
+        address_equal = IPv4Address.__eq__(self, other)
+        if not address_equal or address_equal is NotImplemented:
+            return address_equal
+        try:
+            return self.network == other.network
+        except AttributeError:
+            # An interface with an associated network is NOT the
+            # same as an unassociated address. That's why the hash
+            # takes the extra info into account.
+            return False
+
+    def __lt__(self, other):
+        address_less = IPv4Address.__lt__(self, other)
+        if address_less is NotImplemented:
+            return NotImplemented
+        try:
+            return (self.network < other.network or
+                    self.network == other.network and address_less)
+        except AttributeError:
+            # We *do* allow addresses and interfaces to be sorted. The
+            # unassociated address is considered less than all interfaces.
+            return False
+
+    def __hash__(self):
+        return self._ip ^ self._prefixlen ^ int(self.network.network_address)
+
+    __reduce__ = _IPAddressBase.__reduce__
+
+    @property
+    def ip(self):
+        return IPv4Address(self._ip)
+
+    @property
+    def with_prefixlen(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self._prefixlen)
+
+    @property
+    def with_netmask(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self.netmask)
+
+    @property
+    def with_hostmask(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self.hostmask)
+
+
+class IPv4Network(_BaseV4, _BaseNetwork):
+
+    """This class represents and manipulates 32-bit IPv4 network + addresses..
+
+    Attributes: [examples for IPv4Network('192.0.2.0/27')]
+        .network_address: IPv4Address('192.0.2.0')
+        .hostmask: IPv4Address('0.0.0.31')
+        .broadcast_address: IPv4Address('192.0.2.32')
+        .netmask: IPv4Address('255.255.255.224')
+        .prefixlen: 27
+
+    """
+    # Class to use when creating address objects
+    _address_class = IPv4Address
+
+    def __init__(self, address, strict=True):
+
+        """Instantiate a new IPv4 network object.
+
+        Args:
+            address: A string or integer representing the IP [& network].
+              '192.0.2.0/24'
+              '192.0.2.0/255.255.255.0'
+              '192.0.0.2/0.0.0.255'
+              are all functionally the same in IPv4. Similarly,
+              '192.0.2.1'
+              '192.0.2.1/255.255.255.255'
+              '192.0.2.1/32'
+              are also functionally equivalent. That is to say, failing to
+              provide a subnetmask will create an object with a mask of /32.
+
+              If the mask (portion after the / in the argument) is given in
+              dotted quad form, it is treated as a netmask if it starts with a
+              non-zero field (e.g. /255.0.0.0 == /8) and as a hostmask if it
+              starts with a zero field (e.g. 0.255.255.255 == /8), with the
+              single exception of an all-zero mask which is treated as a
+              netmask == /0. If no mask is given, a default of /32 is used.
+
+              Additionally, an integer can be passed, so
+              IPv4Network('192.0.2.1') == IPv4Network(3221225985)
+              or, more generally
+              IPv4Interface(int(IPv4Interface('192.0.2.1'))) ==
+                IPv4Interface('192.0.2.1')
+
+        Raises:
+            AddressValueError: If ipaddress isn't a valid IPv4 address.
+            NetmaskValueError: If the netmask isn't valid for
+              an IPv4 address.
+            ValueError: If strict is True and a network address is not
+              supplied.
+
+        """
+        _BaseNetwork.__init__(self, address)
+
+        # Constructing from a packed address or integer
+        if isinstance(address, (_compat_int_types, bytes)):
+            self.network_address = IPv4Address(address)
+            self.netmask, self._prefixlen = self._make_netmask(
+                self._max_prefixlen)
+            # fixme: address/network test here.
+            return
+
+        if isinstance(address, tuple):
+            if len(address) > 1:
+                arg = address[1]
+            else:
+                # We weren't given an address[1]
+                arg = self._max_prefixlen
+            self.network_address = IPv4Address(address[0])
+            self.netmask, self._prefixlen = self._make_netmask(arg)
+            packed = int(self.network_address)
+            if packed & int(self.netmask) != packed:
+                if strict:
+                    raise ValueError('%s has host bits set' % self)
+                else:
+                    self.network_address = IPv4Address(packed &
+                                                       int(self.netmask))
+            return
+
+        # Assume input argument to be string or any object representation
+        # which converts into a formatted IP prefix string.
+        addr = _split_optional_netmask(address)
+        self.network_address = IPv4Address(self._ip_int_from_string(addr[0]))
+
+        if len(addr) == 2:
+            arg = addr[1]
+        else:
+            arg = self._max_prefixlen
+        self.netmask, self._prefixlen = self._make_netmask(arg)
+
+        if strict:
+            if (IPv4Address(int(self.network_address) & int(self.netmask)) !=
+                    self.network_address):
+                raise ValueError('%s has host bits set' % self)
+        self.network_address = IPv4Address(int(self.network_address) &
+                                           int(self.netmask))
+
+        if self._prefixlen == (self._max_prefixlen - 1):
+            self.hosts = self.__iter__
+
+    @property
+    def is_global(self):
+        """Test if this address is allocated for public networks.
+
+        Returns:
+            A boolean, True if the address is not reserved per
+            iana-ipv4-special-registry.
+
+        """
+        return (not (self.network_address in IPv4Network('100.64.0.0/10') and
+                self.broadcast_address in IPv4Network('100.64.0.0/10')) and
+                not self.is_private)
+
+
+class _IPv4Constants(object):
+
+    _linklocal_network = IPv4Network('169.254.0.0/16')
+
+    _loopback_network = IPv4Network('127.0.0.0/8')
+
+    _multicast_network = IPv4Network('224.0.0.0/4')
+
+    _public_network = IPv4Network('100.64.0.0/10')
+
+    _private_networks = [
+        IPv4Network('0.0.0.0/8'),
+        IPv4Network('10.0.0.0/8'),
+        IPv4Network('127.0.0.0/8'),
+        IPv4Network('169.254.0.0/16'),
+        IPv4Network('172.16.0.0/12'),
+        IPv4Network('192.0.0.0/29'),
+        IPv4Network('192.0.0.170/31'),
+        IPv4Network('192.0.2.0/24'),
+        IPv4Network('192.168.0.0/16'),
+        IPv4Network('198.18.0.0/15'),
+        IPv4Network('198.51.100.0/24'),
+        IPv4Network('203.0.113.0/24'),
+        IPv4Network('240.0.0.0/4'),
+        IPv4Network('255.255.255.255/32'),
+    ]
+
+    _reserved_network = IPv4Network('240.0.0.0/4')
+
+    _unspecified_address = IPv4Address('0.0.0.0')
+
+
+IPv4Address._constants = _IPv4Constants
+
+
+class _BaseV6(object):
+
+    """Base IPv6 object.
+
+    The following methods are used by IPv6 objects in both single IP
+    addresses and networks.
+
+    """
+
+    __slots__ = ()
+    _version = 6
+    _ALL_ONES = (2 ** IPV6LENGTH) - 1
+    _HEXTET_COUNT = 8
+    _HEX_DIGITS = frozenset('0123456789ABCDEFabcdef')
+    _max_prefixlen = IPV6LENGTH
+
+    # There are only a bunch of valid v6 netmasks, so we cache them all
+    # when constructed (see _make_netmask()).
+    _netmask_cache = {}
+
+    @classmethod
+    def _make_netmask(cls, arg):
+        """Make a (netmask, prefix_len) tuple from the given argument.
+
+        Argument can be:
+        - an integer (the prefix length)
+        - a string representing the prefix length (e.g. "24")
+        - a string representing the prefix netmask (e.g. "255.255.255.0")
+        """
+        if arg not in cls._netmask_cache:
+            if isinstance(arg, _compat_int_types):
+                prefixlen = arg
+            else:
+                prefixlen = cls._prefix_from_prefix_string(arg)
+            netmask = IPv6Address(cls._ip_int_from_prefix(prefixlen))
+            cls._netmask_cache[arg] = netmask, prefixlen
+        return cls._netmask_cache[arg]
+
+    @classmethod
+    def _ip_int_from_string(cls, ip_str):
+        """Turn an IPv6 ip_str into an integer.
+
+        Args:
+            ip_str: A string, the IPv6 ip_str.
+
+        Returns:
+            An int, the IPv6 address
+
+        Raises:
+            AddressValueError: if ip_str isn't a valid IPv6 Address.
+
+        """
+        if not ip_str:
+            raise AddressValueError('Address cannot be empty')
+
+        parts = ip_str.split(':')
+
+        # An IPv6 address needs at least 2 colons (3 parts).
+        _min_parts = 3
+        if len(parts) < _min_parts:
+            msg = "At least %d parts expected in %r" % (_min_parts, ip_str)
+            raise AddressValueError(msg)
+
+        # If the address has an IPv4-style suffix, convert it to hexadecimal.
+        if '.' in parts[-1]:
+            try:
+                ipv4_int = IPv4Address(parts.pop())._ip
+            except AddressValueError as exc:
+                raise AddressValueError("%s in %r" % (exc, ip_str))
+            parts.append('%x' % ((ipv4_int >> 16) & 0xFFFF))
+            parts.append('%x' % (ipv4_int & 0xFFFF))
+
+        # An IPv6 address can't have more than 8 colons (9 parts).
+        # The extra colon comes from using the "::" notation for a single
+        # leading or trailing zero part.
+        _max_parts = cls._HEXTET_COUNT + 1
+        if len(parts) > _max_parts:
+            msg = "At most %d colons permitted in %r" % (
+                _max_parts - 1, ip_str)
+            raise AddressValueError(msg)
+
+        # Disregarding the endpoints, find '::' with nothing in between.
+        # This indicates that a run of zeroes has been skipped.
+        skip_index = None
+        for i in _compat_range(1, len(parts) - 1):
+            if not parts[i]:
+                if skip_index is not None:
+                    # Can't have more than one '::'
+                    msg = "At most one '::' permitted in %r" % ip_str
+                    raise AddressValueError(msg)
+                skip_index = i
+
+        # parts_hi is the number of parts to copy from above/before the '::'
+        # parts_lo is the number of parts to copy from below/after the '::'
+        if skip_index is not None:
+            # If we found a '::', then check if it also covers the endpoints.
+            parts_hi = skip_index
+            parts_lo = len(parts) - skip_index - 1
+            if not parts[0]:
+                parts_hi -= 1
+                if parts_hi:
+                    msg = "Leading ':' only permitted as part of '::' in %r"
+                    raise AddressValueError(msg % ip_str)  # ^: requires ^::
+            if not parts[-1]:
+                parts_lo -= 1
+                if parts_lo:
+                    msg = "Trailing ':' only permitted as part of '::' in %r"
+                    raise AddressValueError(msg % ip_str)  # :$ requires ::$
+            parts_skipped = cls._HEXTET_COUNT - (parts_hi + parts_lo)
+            if parts_skipped < 1:
+                msg = "Expected at most %d other parts with '::' in %r"
+                raise AddressValueError(msg % (cls._HEXTET_COUNT - 1, ip_str))
+        else:
+            # Otherwise, allocate the entire address to parts_hi.  The
+            # endpoints could still be empty, but _parse_hextet() will check
+            # for that.
+            if len(parts) != cls._HEXTET_COUNT:
+                msg = "Exactly %d parts expected without '::' in %r"
+                raise AddressValueError(msg % (cls._HEXTET_COUNT, ip_str))
+            if not parts[0]:
+                msg = "Leading ':' only permitted as part of '::' in %r"
+                raise AddressValueError(msg % ip_str)  # ^: requires ^::
+            if not parts[-1]:
+                msg = "Trailing ':' only permitted as part of '::' in %r"
+                raise AddressValueError(msg % ip_str)  # :$ requires ::$
+            parts_hi = len(parts)
+            parts_lo = 0
+            parts_skipped = 0
+
+        try:
+            # Now, parse the hextets into a 128-bit integer.
+            ip_int = 0
+            for i in range(parts_hi):
+                ip_int <<= 16
+                ip_int |= cls._parse_hextet(parts[i])
+            ip_int <<= 16 * parts_skipped
+            for i in range(-parts_lo, 0):
+                ip_int <<= 16
+                ip_int |= cls._parse_hextet(parts[i])
+            return ip_int
+        except ValueError as exc:
+            raise AddressValueError("%s in %r" % (exc, ip_str))
+
+    @classmethod
+    def _parse_hextet(cls, hextet_str):
+        """Convert an IPv6 hextet string into an integer.
+
+        Args:
+            hextet_str: A string, the number to parse.
+
+        Returns:
+            The hextet as an integer.
+
+        Raises:
+            ValueError: if the input isn't strictly a hex number from
+              [0..FFFF].
+
+        """
+        # Whitelist the characters, since int() allows a lot of bizarre stuff.
+        if not cls._HEX_DIGITS.issuperset(hextet_str):
+            raise ValueError("Only hex digits permitted in %r" % hextet_str)
+        # We do the length check second, since the invalid character error
+        # is likely to be more informative for the user
+        if len(hextet_str) > 4:
+            msg = "At most 4 characters permitted in %r"
+            raise ValueError(msg % hextet_str)
+        # Length check means we can skip checking the integer value
+        return int(hextet_str, 16)
+
+    @classmethod
+    def _compress_hextets(cls, hextets):
+        """Compresses a list of hextets.
+
+        Compresses a list of strings, replacing the longest continuous
+        sequence of "0" in the list with "" and adding empty strings at
+        the beginning or at the end of the string such that subsequently
+        calling ":".join(hextets) will produce the compressed version of
+        the IPv6 address.
+
+        Args:
+            hextets: A list of strings, the hextets to compress.
+
+        Returns:
+            A list of strings.
+
+        """
+        best_doublecolon_start = -1
+        best_doublecolon_len = 0
+        doublecolon_start = -1
+        doublecolon_len = 0
+        for index, hextet in enumerate(hextets):
+            if hextet == '0':
+                doublecolon_len += 1
+                if doublecolon_start == -1:
+                    # Start of a sequence of zeros.
+                    doublecolon_start = index
+                if doublecolon_len > best_doublecolon_len:
+                    # This is the longest sequence of zeros so far.
+                    best_doublecolon_len = doublecolon_len
+                    best_doublecolon_start = doublecolon_start
+            else:
+                doublecolon_len = 0
+                doublecolon_start = -1
+
+        if best_doublecolon_len > 1:
+            best_doublecolon_end = (best_doublecolon_start +
+                                    best_doublecolon_len)
+            # For zeros at the end of the address.
+            if best_doublecolon_end == len(hextets):
+                hextets += ['']
+            hextets[best_doublecolon_start:best_doublecolon_end] = ['']
+            # For zeros at the beginning of the address.
+            if best_doublecolon_start == 0:
+                hextets = [''] + hextets
+
+        return hextets
+
+    @classmethod
+    def _string_from_ip_int(cls, ip_int=None):
+        """Turns a 128-bit integer into hexadecimal notation.
+
+        Args:
+            ip_int: An integer, the IP address.
+
+        Returns:
+            A string, the hexadecimal representation of the address.
+
+        Raises:
+            ValueError: The address is bigger than 128 bits of all ones.
+
+        """
+        if ip_int is None:
+            ip_int = int(cls._ip)
+
+        if ip_int > cls._ALL_ONES:
+            raise ValueError('IPv6 address is too large')
+
+        hex_str = '%032x' % ip_int
+        hextets = ['%x' % int(hex_str[x:x + 4], 16) for x in range(0, 32, 4)]
+
+        hextets = cls._compress_hextets(hextets)
+        return ':'.join(hextets)
+
+    def _explode_shorthand_ip_string(self):
+        """Expand a shortened IPv6 address.
+
+        Args:
+            ip_str: A string, the IPv6 address.
+
+        Returns:
+            A string, the expanded IPv6 address.
+
+        """
+        if isinstance(self, IPv6Network):
+            ip_str = _compat_str(self.network_address)
+        elif isinstance(self, IPv6Interface):
+            ip_str = _compat_str(self.ip)
+        else:
+            ip_str = _compat_str(self)
+
+        ip_int = self._ip_int_from_string(ip_str)
+        hex_str = '%032x' % ip_int
+        parts = [hex_str[x:x + 4] for x in range(0, 32, 4)]
+        if isinstance(self, (_BaseNetwork, IPv6Interface)):
+            return '%s/%d' % (':'.join(parts), self._prefixlen)
+        return ':'.join(parts)
+
+    def _reverse_pointer(self):
+        """Return the reverse DNS pointer name for the IPv6 address.
+
+        This implements the method described in RFC3596 2.5.
+
+        """
+        reverse_chars = self.exploded[::-1].replace(':', '')
+        return '.'.join(reverse_chars) + '.ip6.arpa'
+
+    @property
+    def max_prefixlen(self):
+        return self._max_prefixlen
+
+    @property
+    def version(self):
+        return self._version
+
+
+class IPv6Address(_BaseV6, _BaseAddress):
+
+    """Represent and manipulate single IPv6 Addresses."""
+
+    __slots__ = ('_ip', '__weakref__')
+
+    def __init__(self, address):
+        """Instantiate a new IPv6 address object.
+
+        Args:
+            address: A string or integer representing the IP
+
+              Additionally, an integer can be passed, so
+              IPv6Address('2001:db8::') ==
+                IPv6Address(42540766411282592856903984951653826560)
+              or, more generally
+              IPv6Address(int(IPv6Address('2001:db8::'))) ==
+                IPv6Address('2001:db8::')
+
+        Raises:
+            AddressValueError: If address isn't a valid IPv6 address.
+
+        """
+        # Efficient constructor from integer.
+        if isinstance(address, _compat_int_types):
+            self._check_int_address(address)
+            self._ip = address
+            return
+
+        # Constructing from a packed address
+        if isinstance(address, bytes):
+            self._check_packed_address(address, 16)
+            bvs = _compat_bytes_to_byte_vals(address)
+            self._ip = _compat_int_from_byte_vals(bvs, 'big')
+            return
+
+        # Assume input argument to be string or any object representation
+        # which converts into a formatted IP string.
+        addr_str = _compat_str(address)
+        if '/' in addr_str:
+            raise AddressValueError("Unexpected '/' in %r" % address)
+        self._ip = self._ip_int_from_string(addr_str)
+
+    @property
+    def packed(self):
+        """The binary representation of this address."""
+        return v6_int_to_packed(self._ip)
+
+    @property
+    def is_multicast(self):
+        """Test if the address is reserved for multicast use.
+
+        Returns:
+            A boolean, True if the address is a multicast address.
+            See RFC 2373 2.7 for details.
+
+        """
+        return self in self._constants._multicast_network
+
+    @property
+    def is_reserved(self):
+        """Test if the address is otherwise IETF reserved.
+
+        Returns:
+            A boolean, True if the address is within one of the
+            reserved IPv6 Network ranges.
+
+        """
+        return any(self in x for x in self._constants._reserved_networks)
+
+    @property
+    def is_link_local(self):
+        """Test if the address is reserved for link-local.
+
+        Returns:
+            A boolean, True if the address is reserved per RFC 4291.
+
+        """
+        return self in self._constants._linklocal_network
+
+    @property
+    def is_site_local(self):
+        """Test if the address is reserved for site-local.
+
+        Note that the site-local address space has been deprecated by RFC 3879.
+        Use is_private to test if this address is in the space of unique local
+        addresses as defined by RFC 4193.
+
+        Returns:
+            A boolean, True if the address is reserved per RFC 3513 2.5.6.
+
+        """
+        return self in self._constants._sitelocal_network
+
+    @property
+    def is_private(self):
+        """Test if this address is allocated for private networks.
+
+        Returns:
+            A boolean, True if the address is reserved per
+            iana-ipv6-special-registry.
+
+        """
+        return any(self in net for net in self._constants._private_networks)
+
+    @property
+    def is_global(self):
+        """Test if this address is allocated for public networks.
+
+        Returns:
+            A boolean, true if the address is not reserved per
+            iana-ipv6-special-registry.
+
+        """
+        return not self.is_private
+
+    @property
+    def is_unspecified(self):
+        """Test if the address is unspecified.
+
+        Returns:
+            A boolean, True if this is the unspecified address as defined in
+            RFC 2373 2.5.2.
+
+        """
+        return self._ip == 0
+
+    @property
+    def is_loopback(self):
+        """Test if the address is a loopback address.
+
+        Returns:
+            A boolean, True if the address is a loopback address as defined in
+            RFC 2373 2.5.3.
+
+        """
+        return self._ip == 1
+
+    @property
+    def ipv4_mapped(self):
+        """Return the IPv4 mapped address.
+
+        Returns:
+            If the IPv6 address is a v4 mapped address, return the
+            IPv4 mapped address. Return None otherwise.
+
+        """
+        if (self._ip >> 32) != 0xFFFF:
+            return None
+        return IPv4Address(self._ip & 0xFFFFFFFF)
+
+    @property
+    def teredo(self):
+        """Tuple of embedded teredo IPs.
+
+        Returns:
+            Tuple of the (server, client) IPs or None if the address
+            doesn't appear to be a teredo address (doesn't start with
+            2001::/32)
+
+        """
+        if (self._ip >> 96) != 0x20010000:
+            return None
+        return (IPv4Address((self._ip >> 64) & 0xFFFFFFFF),
+                IPv4Address(~self._ip & 0xFFFFFFFF))
+
+    @property
+    def sixtofour(self):
+        """Return the IPv4 6to4 embedded address.
+
+        Returns:
+            The IPv4 6to4-embedded address if present or None if the
+            address doesn't appear to contain a 6to4 embedded address.
+
+        """
+        if (self._ip >> 112) != 0x2002:
+            return None
+        return IPv4Address((self._ip >> 80) & 0xFFFFFFFF)
+
+
+class IPv6Interface(IPv6Address):
+
+    def __init__(self, address):
+        if isinstance(address, (bytes, _compat_int_types)):
+            IPv6Address.__init__(self, address)
+            self.network = IPv6Network(self._ip)
+            self._prefixlen = self._max_prefixlen
+            return
+        if isinstance(address, tuple):
+            IPv6Address.__init__(self, address[0])
+            if len(address) > 1:
+                self._prefixlen = int(address[1])
+            else:
+                self._prefixlen = self._max_prefixlen
+            self.network = IPv6Network(address, strict=False)
+            self.netmask = self.network.netmask
+            self.hostmask = self.network.hostmask
+            return
+
+        addr = _split_optional_netmask(address)
+        IPv6Address.__init__(self, addr[0])
+        self.network = IPv6Network(address, strict=False)
+        self.netmask = self.network.netmask
+        self._prefixlen = self.network._prefixlen
+        self.hostmask = self.network.hostmask
+
+    def __str__(self):
+        return '%s/%d' % (self._string_from_ip_int(self._ip),
+                          self.network.prefixlen)
+
+    def __eq__(self, other):
+        address_equal = IPv6Address.__eq__(self, other)
+        if not address_equal or address_equal is NotImplemented:
+            return address_equal
+        try:
+            return self.network == other.network
+        except AttributeError:
+            # An interface with an associated network is NOT the
+            # same as an unassociated address. That's why the hash
+            # takes the extra info into account.
+            return False
+
+    def __lt__(self, other):
+        address_less = IPv6Address.__lt__(self, other)
+        if address_less is NotImplemented:
+            return NotImplemented
+        try:
+            return (self.network < other.network or
+                    self.network == other.network and address_less)
+        except AttributeError:
+            # We *do* allow addresses and interfaces to be sorted. The
+            # unassociated address is considered less than all interfaces.
+            return False
+
+    def __hash__(self):
+        return self._ip ^ self._prefixlen ^ int(self.network.network_address)
+
+    __reduce__ = _IPAddressBase.__reduce__
+
+    @property
+    def ip(self):
+        return IPv6Address(self._ip)
+
+    @property
+    def with_prefixlen(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self._prefixlen)
+
+    @property
+    def with_netmask(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self.netmask)
+
+    @property
+    def with_hostmask(self):
+        return '%s/%s' % (self._string_from_ip_int(self._ip),
+                          self.hostmask)
+
+    @property
+    def is_unspecified(self):
+        return self._ip == 0 and self.network.is_unspecified
+
+    @property
+    def is_loopback(self):
+        return self._ip == 1 and self.network.is_loopback
+
+
+class IPv6Network(_BaseV6, _BaseNetwork):
+
+    """This class represents and manipulates 128-bit IPv6 networks.
+
+    Attributes: [examples for IPv6('2001:db8::1000/124')]
+        .network_address: IPv6Address('2001:db8::1000')
+        .hostmask: IPv6Address('::f')
+        .broadcast_address: IPv6Address('2001:db8::100f')
+        .netmask: IPv6Address('ffff:ffff:ffff:ffff:ffff:ffff:ffff:fff0')
+        .prefixlen: 124
+
+    """
+
+    # Class to use when creating address objects
+    _address_class = IPv6Address
+
+    def __init__(self, address, strict=True):
+        """Instantiate a new IPv6 Network object.
+
+        Args:
+            address: A string or integer representing the IPv6 network or the
+              IP and prefix/netmask.
+              '2001:db8::/128'
+              '2001:db8:0000:0000:0000:0000:0000:0000/128'
+              '2001:db8::'
+              are all functionally the same in IPv6.  That is to say,
+              failing to provide a subnetmask will create an object with
+              a mask of /128.
+
+              Additionally, an integer can be passed, so
+              IPv6Network('2001:db8::') ==
+                IPv6Network(42540766411282592856903984951653826560)
+              or, more generally
+              IPv6Network(int(IPv6Network('2001:db8::'))) ==
+                IPv6Network('2001:db8::')
+
+            strict: A boolean. If true, ensure that we have been passed
+              A true network address, eg, 2001:db8::1000/124 and not an
+              IP address on a network, eg, 2001:db8::1/124.
+
+        Raises:
+            AddressValueError: If address isn't a valid IPv6 address.
+            NetmaskValueError: If the netmask isn't valid for
+              an IPv6 address.
+            ValueError: If strict was True and a network address was not
+              supplied.
+
+        """
+        _BaseNetwork.__init__(self, address)
+
+        # Efficient constructor from integer or packed address
+        if isinstance(address, (bytes, _compat_int_types)):
+            self.network_address = IPv6Address(address)
+            self.netmask, self._prefixlen = self._make_netmask(
+                self._max_prefixlen)
+            return
+
+        if isinstance(address, tuple):
+            if len(address) > 1:
+                arg = address[1]
+            else:
+                arg = self._max_prefixlen
+            self.netmask, self._prefixlen = self._make_netmask(arg)
+            self.network_address = IPv6Address(address[0])
+            packed = int(self.network_address)
+            if packed & int(self.netmask) != packed:
+                if strict:
+                    raise ValueError('%s has host bits set' % self)
+                else:
+                    self.network_address = IPv6Address(packed &
+                                                       int(self.netmask))
+            return
+
+        # Assume input argument to be string or any object representation
+        # which converts into a formatted IP prefix string.
+        addr = _split_optional_netmask(address)
+
+        self.network_address = IPv6Address(self._ip_int_from_string(addr[0]))
+
+        if len(addr) == 2:
+            arg = addr[1]
+        else:
+            arg = self._max_prefixlen
+        self.netmask, self._prefixlen = self._make_netmask(arg)
+
+        if strict:
+            if (IPv6Address(int(self.network_address) & int(self.netmask)) !=
+                    self.network_address):
+                raise ValueError('%s has host bits set' % self)
+        self.network_address = IPv6Address(int(self.network_address) &
+                                           int(self.netmask))
+
+        if self._prefixlen == (self._max_prefixlen - 1):
+            self.hosts = self.__iter__
+
+    def hosts(self):
+        """Generate Iterator over usable hosts in a network.
+
+          This is like __iter__ except it doesn't return the
+          Subnet-Router anycast address.
+
+        """
+        network = int(self.network_address)
+        broadcast = int(self.broadcast_address)
+        for x in _compat_range(network + 1, broadcast + 1):
+            yield self._address_class(x)
+
+    @property
+    def is_site_local(self):
+        """Test if the address is reserved for site-local.
+
+        Note that the site-local address space has been deprecated by RFC 3879.
+        Use is_private to test if this address is in the space of unique local
+        addresses as defined by RFC 4193.
+
+        Returns:
+            A boolean, True if the address is reserved per RFC 3513 2.5.6.
+
+        """
+        return (self.network_address.is_site_local and
+                self.broadcast_address.is_site_local)
+
+
+class _IPv6Constants(object):
+
+    _linklocal_network = IPv6Network('fe80::/10')
+
+    _multicast_network = IPv6Network('ff00::/8')
+
+    _private_networks = [
+        IPv6Network('::1/128'),
+        IPv6Network('::/128'),
+        IPv6Network('::ffff:0:0/96'),
+        IPv6Network('100::/64'),
+        IPv6Network('2001::/23'),
+        IPv6Network('2001:2::/48'),
+        IPv6Network('2001:db8::/32'),
+        IPv6Network('2001:10::/28'),
+        IPv6Network('fc00::/7'),
+        IPv6Network('fe80::/10'),
+    ]
+
+    _reserved_networks = [
+        IPv6Network('::/8'), IPv6Network('100::/8'),
+        IPv6Network('200::/7'), IPv6Network('400::/6'),
+        IPv6Network('800::/5'), IPv6Network('1000::/4'),
+        IPv6Network('4000::/3'), IPv6Network('6000::/3'),
+        IPv6Network('8000::/3'), IPv6Network('A000::/3'),
+        IPv6Network('C000::/3'), IPv6Network('E000::/4'),
+        IPv6Network('F000::/5'), IPv6Network('F800::/6'),
+        IPv6Network('FE00::/9'),
+    ]
+
+    _sitelocal_network = IPv6Network('fec0::/10')
+
+
+IPv6Address._constants = _IPv6Constants
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/__init__.py
new file mode 100644
index 0000000..d6705e2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/__init__.py
@@ -0,0 +1,54 @@
+# coding: utf-8
+from ._version import version
+from .exceptions import *
+from .ext import ExtType, Timestamp
+
+import os
+import sys
+
+
+if os.environ.get("MSGPACK_PUREPYTHON") or sys.version_info[0] == 2:
+    from .fallback import Packer, unpackb, Unpacker
+else:
+    try:
+        from ._cmsgpack import Packer, unpackb, Unpacker
+    except ImportError:
+        from .fallback import Packer, unpackb, Unpacker
+
+
+def pack(o, stream, **kwargs):
+    """
+    Pack object `o` and write it to `stream`
+
+    See :class:`Packer` for options.
+    """
+    packer = Packer(**kwargs)
+    stream.write(packer.pack(o))
+
+
+def packb(o, **kwargs):
+    """
+    Pack object `o` and return packed bytes
+
+    See :class:`Packer` for options.
+    """
+    return Packer(**kwargs).pack(o)
+
+
+def unpack(stream, **kwargs):
+    """
+    Unpack an object from `stream`.
+
+    Raises `ExtraData` when `stream` contains extra bytes.
+    See :class:`Unpacker` for options.
+    """
+    data = stream.read()
+    return unpackb(data, **kwargs)
+
+
+# alias for compatibility to simplejson/marshal/pickle.
+load = unpack
+loads = unpackb
+
+dump = pack
+dumps = packb
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/__pycache__/fallback.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/__pycache__/fallback.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/_version.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/_version.py
new file mode 100644
index 0000000..9f55cf5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/_version.py
@@ -0,0 +1 @@
+version = (1, 0, 0)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/exceptions.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/exceptions.py
new file mode 100644
index 0000000..d6d2615
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/exceptions.py
@@ -0,0 +1,48 @@
+class UnpackException(Exception):
+    """Base class for some exceptions raised while unpacking.
+
+    NOTE: unpack may raise exception other than subclass of
+    UnpackException.  If you want to catch all error, catch
+    Exception instead.
+    """
+
+
+class BufferFull(UnpackException):
+    pass
+
+
+class OutOfData(UnpackException):
+    pass
+
+
+class FormatError(ValueError, UnpackException):
+    """Invalid msgpack format"""
+
+
+class StackError(ValueError, UnpackException):
+    """Too nested"""
+
+
+# Deprecated.  Use ValueError instead
+UnpackValueError = ValueError
+
+
+class ExtraData(UnpackValueError):
+    """ExtraData is raised when there is trailing data.
+
+    This exception is raised while only one-shot (not streaming)
+    unpack.
+    """
+
+    def __init__(self, unpacked, extra):
+        self.unpacked = unpacked
+        self.extra = extra
+
+    def __str__(self):
+        return "unpack(b) received extra data."
+
+
+# Deprecated.  Use Exception instead to catch all exception during packing.
+PackException = Exception
+PackValueError = ValueError
+PackOverflowError = OverflowError
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/ext.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/ext.py
new file mode 100644
index 0000000..8341c68
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/ext.py
@@ -0,0 +1,191 @@
+# coding: utf-8
+from collections import namedtuple
+import datetime
+import sys
+import struct
+
+
+PY2 = sys.version_info[0] == 2
+
+if PY2:
+    int_types = (int, long)
+    _utc = None
+else:
+    int_types = int
+    try:
+        _utc = datetime.timezone.utc
+    except AttributeError:
+        _utc = datetime.timezone(datetime.timedelta(0))
+
+
+class ExtType(namedtuple("ExtType", "code data")):
+    """ExtType represents ext type in msgpack."""
+
+    def __new__(cls, code, data):
+        if not isinstance(code, int):
+            raise TypeError("code must be int")
+        if not isinstance(data, bytes):
+            raise TypeError("data must be bytes")
+        if not 0 <= code <= 127:
+            raise ValueError("code must be 0~127")
+        return super(ExtType, cls).__new__(cls, code, data)
+
+
+class Timestamp(object):
+    """Timestamp represents the Timestamp extension type in msgpack.
+
+    When built with Cython, msgpack uses C methods to pack and unpack `Timestamp`. When using pure-Python
+    msgpack, :func:`to_bytes` and :func:`from_bytes` are used to pack and unpack `Timestamp`.
+
+    This class is immutable: Do not override seconds and nanoseconds.
+    """
+
+    __slots__ = ["seconds", "nanoseconds"]
+
+    def __init__(self, seconds, nanoseconds=0):
+        """Initialize a Timestamp object.
+
+        :param int seconds:
+            Number of seconds since the UNIX epoch (00:00:00 UTC Jan 1 1970, minus leap seconds).
+            May be negative.
+
+        :param int nanoseconds:
+            Number of nanoseconds to add to `seconds` to get fractional time.
+            Maximum is 999_999_999.  Default is 0.
+
+        Note: Negative times (before the UNIX epoch) are represented as negative seconds + positive ns.
+        """
+        if not isinstance(seconds, int_types):
+            raise TypeError("seconds must be an interger")
+        if not isinstance(nanoseconds, int_types):
+            raise TypeError("nanoseconds must be an integer")
+        if not (0 <= nanoseconds < 10 ** 9):
+            raise ValueError(
+                "nanoseconds must be a non-negative integer less than 999999999."
+            )
+        self.seconds = seconds
+        self.nanoseconds = nanoseconds
+
+    def __repr__(self):
+        """String representation of Timestamp."""
+        return "Timestamp(seconds={0}, nanoseconds={1})".format(
+            self.seconds, self.nanoseconds
+        )
+
+    def __eq__(self, other):
+        """Check for equality with another Timestamp object"""
+        if type(other) is self.__class__:
+            return (
+                self.seconds == other.seconds and self.nanoseconds == other.nanoseconds
+            )
+        return False
+
+    def __ne__(self, other):
+        """not-equals method (see :func:`__eq__()`)"""
+        return not self.__eq__(other)
+
+    def __hash__(self):
+        return hash((self.seconds, self.nanoseconds))
+
+    @staticmethod
+    def from_bytes(b):
+        """Unpack bytes into a `Timestamp` object.
+
+        Used for pure-Python msgpack unpacking.
+
+        :param b: Payload from msgpack ext message with code -1
+        :type b: bytes
+
+        :returns: Timestamp object unpacked from msgpack ext payload
+        :rtype: Timestamp
+        """
+        if len(b) == 4:
+            seconds = struct.unpack("!L", b)[0]
+            nanoseconds = 0
+        elif len(b) == 8:
+            data64 = struct.unpack("!Q", b)[0]
+            seconds = data64 & 0x00000003FFFFFFFF
+            nanoseconds = data64 >> 34
+        elif len(b) == 12:
+            nanoseconds, seconds = struct.unpack("!Iq", b)
+        else:
+            raise ValueError(
+                "Timestamp type can only be created from 32, 64, or 96-bit byte objects"
+            )
+        return Timestamp(seconds, nanoseconds)
+
+    def to_bytes(self):
+        """Pack this Timestamp object into bytes.
+
+        Used for pure-Python msgpack packing.
+
+        :returns data: Payload for EXT message with code -1 (timestamp type)
+        :rtype: bytes
+        """
+        if (self.seconds >> 34) == 0:  # seconds is non-negative and fits in 34 bits
+            data64 = self.nanoseconds << 34 | self.seconds
+            if data64 & 0xFFFFFFFF00000000 == 0:
+                # nanoseconds is zero and seconds < 2**32, so timestamp 32
+                data = struct.pack("!L", data64)
+            else:
+                # timestamp 64
+                data = struct.pack("!Q", data64)
+        else:
+            # timestamp 96
+            data = struct.pack("!Iq", self.nanoseconds, self.seconds)
+        return data
+
+    @staticmethod
+    def from_unix(unix_sec):
+        """Create a Timestamp from posix timestamp in seconds.
+
+        :param unix_float: Posix timestamp in seconds.
+        :type unix_float: int or float.
+        """
+        seconds = int(unix_sec // 1)
+        nanoseconds = int((unix_sec % 1) * 10 ** 9)
+        return Timestamp(seconds, nanoseconds)
+
+    def to_unix(self):
+        """Get the timestamp as a floating-point value.
+
+        :returns: posix timestamp
+        :rtype: float
+        """
+        return self.seconds + self.nanoseconds / 1e9
+
+    @staticmethod
+    def from_unix_nano(unix_ns):
+        """Create a Timestamp from posix timestamp in nanoseconds.
+
+        :param int unix_ns: Posix timestamp in nanoseconds.
+        :rtype: Timestamp
+        """
+        return Timestamp(*divmod(unix_ns, 10 ** 9))
+
+    def to_unix_nano(self):
+        """Get the timestamp as a unixtime in nanoseconds.
+
+        :returns: posix timestamp in nanoseconds
+        :rtype: int
+        """
+        return self.seconds * 10 ** 9 + self.nanoseconds
+
+    def to_datetime(self):
+        """Get the timestamp as a UTC datetime.
+
+        Python 2 is not supported.
+
+        :rtype: datetime.
+        """
+        return datetime.datetime.fromtimestamp(self.to_unix(), _utc)
+
+    @staticmethod
+    def from_datetime(dt):
+        """Create a Timestamp from datetime with tzinfo.
+
+        Python 2 is not supported.
+
+        :rtype: Timestamp
+        """
+        return Timestamp.from_unix(dt.timestamp())
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/fallback.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/fallback.py
new file mode 100644
index 0000000..9f6665b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/msgpack/fallback.py
@@ -0,0 +1,1063 @@
+"""Fallback pure Python implementation of msgpack"""
+
+from datetime import datetime as _DateTime
+import sys
+import struct
+
+
+PY2 = sys.version_info[0] == 2
+if PY2:
+    int_types = (int, long)
+
+    def dict_iteritems(d):
+        return d.iteritems()
+
+
+else:
+    int_types = int
+    unicode = str
+    xrange = range
+
+    def dict_iteritems(d):
+        return d.items()
+
+
+if sys.version_info < (3, 5):
+    # Ugly hack...
+    RecursionError = RuntimeError
+
+    def _is_recursionerror(e):
+        return (
+            len(e.args) == 1
+            and isinstance(e.args[0], str)
+            and e.args[0].startswith("maximum recursion depth exceeded")
+        )
+
+
+else:
+
+    def _is_recursionerror(e):
+        return True
+
+
+if hasattr(sys, "pypy_version_info"):
+    # StringIO is slow on PyPy, StringIO is faster.  However: PyPy's own
+    # StringBuilder is fastest.
+    from __pypy__ import newlist_hint
+
+    try:
+        from __pypy__.builders import BytesBuilder as StringBuilder
+    except ImportError:
+        from __pypy__.builders import StringBuilder
+    USING_STRINGBUILDER = True
+
+    class StringIO(object):
+        def __init__(self, s=b""):
+            if s:
+                self.builder = StringBuilder(len(s))
+                self.builder.append(s)
+            else:
+                self.builder = StringBuilder()
+
+        def write(self, s):
+            if isinstance(s, memoryview):
+                s = s.tobytes()
+            elif isinstance(s, bytearray):
+                s = bytes(s)
+            self.builder.append(s)
+
+        def getvalue(self):
+            return self.builder.build()
+
+
+else:
+    USING_STRINGBUILDER = False
+    from io import BytesIO as StringIO
+
+    newlist_hint = lambda size: []
+
+
+from .exceptions import BufferFull, OutOfData, ExtraData, FormatError, StackError
+
+from .ext import ExtType, Timestamp
+
+
+EX_SKIP = 0
+EX_CONSTRUCT = 1
+EX_READ_ARRAY_HEADER = 2
+EX_READ_MAP_HEADER = 3
+
+TYPE_IMMEDIATE = 0
+TYPE_ARRAY = 1
+TYPE_MAP = 2
+TYPE_RAW = 3
+TYPE_BIN = 4
+TYPE_EXT = 5
+
+DEFAULT_RECURSE_LIMIT = 511
+
+
+def _check_type_strict(obj, t, type=type, tuple=tuple):
+    if type(t) is tuple:
+        return type(obj) in t
+    else:
+        return type(obj) is t
+
+
+def _get_data_from_buffer(obj):
+    view = memoryview(obj)
+    if view.itemsize != 1:
+        raise ValueError("cannot unpack from multi-byte object")
+    return view
+
+
+def unpackb(packed, **kwargs):
+    """
+    Unpack an object from `packed`.
+
+    Raises ``ExtraData`` when *packed* contains extra bytes.
+    Raises ``ValueError`` when *packed* is incomplete.
+    Raises ``FormatError`` when *packed* is not valid msgpack.
+    Raises ``StackError`` when *packed* contains too nested.
+    Other exceptions can be raised during unpacking.
+
+    See :class:`Unpacker` for options.
+    """
+    unpacker = Unpacker(None, max_buffer_size=len(packed), **kwargs)
+    unpacker.feed(packed)
+    try:
+        ret = unpacker._unpack()
+    except OutOfData:
+        raise ValueError("Unpack failed: incomplete input")
+    except RecursionError as e:
+        if _is_recursionerror(e):
+            raise StackError
+        raise
+    if unpacker._got_extradata():
+        raise ExtraData(ret, unpacker._get_extradata())
+    return ret
+
+
+if sys.version_info < (2, 7, 6):
+
+    def _unpack_from(f, b, o=0):
+        """Explicit type cast for legacy struct.unpack_from"""
+        return struct.unpack_from(f, bytes(b), o)
+
+
+else:
+    _unpack_from = struct.unpack_from
+
+
+class Unpacker(object):
+    """Streaming unpacker.
+
+    Arguments:
+
+    :param file_like:
+        File-like object having `.read(n)` method.
+        If specified, unpacker reads serialized data from it and :meth:`feed()` is not usable.
+
+    :param int read_size:
+        Used as `file_like.read(read_size)`. (default: `min(16*1024, max_buffer_size)`)
+
+    :param bool use_list:
+        If true, unpack msgpack array to Python list.
+        Otherwise, unpack to Python tuple. (default: True)
+
+    :param bool raw:
+        If true, unpack msgpack raw to Python bytes.
+        Otherwise, unpack to Python str by decoding with UTF-8 encoding (default).
+
+    :param int timestamp:
+        Control how timestamp type is unpacked:
+
+            0 - Timestamp
+            1 - float  (Seconds from the EPOCH)
+            2 - int  (Nanoseconds from the EPOCH)
+            3 - datetime.datetime  (UTC).  Python 2 is not supported.
+
+    :param bool strict_map_key:
+        If true (default), only str or bytes are accepted for map (dict) keys.
+
+    :param callable object_hook:
+        When specified, it should be callable.
+        Unpacker calls it with a dict argument after unpacking msgpack map.
+        (See also simplejson)
+
+    :param callable object_pairs_hook:
+        When specified, it should be callable.
+        Unpacker calls it with a list of key-value pairs after unpacking msgpack map.
+        (See also simplejson)
+
+    :param str unicode_errors:
+        The error handler for decoding unicode. (default: 'strict')
+        This option should be used only when you have msgpack data which
+        contains invalid UTF-8 string.
+
+    :param int max_buffer_size:
+        Limits size of data waiting unpacked.  0 means 2**32-1.
+        The default value is 100*1024*1024 (100MiB).
+        Raises `BufferFull` exception when it is insufficient.
+        You should set this parameter when unpacking data from untrusted source.
+
+    :param int max_str_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max length of str. (default: max_buffer_size)
+
+    :param int max_bin_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max length of bin. (default: max_buffer_size)
+
+    :param int max_array_len:
+        Limits max length of array.
+        (default: max_buffer_size)
+
+    :param int max_map_len:
+        Limits max length of map.
+        (default: max_buffer_size//2)
+
+    :param int max_ext_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max size of ext type.  (default: max_buffer_size)
+
+    Example of streaming deserialize from file-like object::
+
+        unpacker = Unpacker(file_like)
+        for o in unpacker:
+            process(o)
+
+    Example of streaming deserialize from socket::
+
+        unpacker = Unpacker(max_buffer_size)
+        while True:
+            buf = sock.recv(1024**2)
+            if not buf:
+                break
+            unpacker.feed(buf)
+            for o in unpacker:
+                process(o)
+
+    Raises ``ExtraData`` when *packed* contains extra bytes.
+    Raises ``OutOfData`` when *packed* is incomplete.
+    Raises ``FormatError`` when *packed* is not valid msgpack.
+    Raises ``StackError`` when *packed* contains too nested.
+    Other exceptions can be raised during unpacking.
+    """
+
+    def __init__(
+        self,
+        file_like=None,
+        read_size=0,
+        use_list=True,
+        raw=False,
+        timestamp=0,
+        strict_map_key=True,
+        object_hook=None,
+        object_pairs_hook=None,
+        list_hook=None,
+        unicode_errors=None,
+        max_buffer_size=100 * 1024 * 1024,
+        ext_hook=ExtType,
+        max_str_len=-1,
+        max_bin_len=-1,
+        max_array_len=-1,
+        max_map_len=-1,
+        max_ext_len=-1,
+    ):
+        if unicode_errors is None:
+            unicode_errors = "strict"
+
+        if file_like is None:
+            self._feeding = True
+        else:
+            if not callable(file_like.read):
+                raise TypeError("`file_like.read` must be callable")
+            self.file_like = file_like
+            self._feeding = False
+
+        #: array of bytes fed.
+        self._buffer = bytearray()
+        #: Which position we currently reads
+        self._buff_i = 0
+
+        # When Unpacker is used as an iterable, between the calls to next(),
+        # the buffer is not "consumed" completely, for efficiency sake.
+        # Instead, it is done sloppily.  To make sure we raise BufferFull at
+        # the correct moments, we have to keep track of how sloppy we were.
+        # Furthermore, when the buffer is incomplete (that is: in the case
+        # we raise an OutOfData) we need to rollback the buffer to the correct
+        # state, which _buf_checkpoint records.
+        self._buf_checkpoint = 0
+
+        if not max_buffer_size:
+            max_buffer_size = 2 ** 31 - 1
+        if max_str_len == -1:
+            max_str_len = max_buffer_size
+        if max_bin_len == -1:
+            max_bin_len = max_buffer_size
+        if max_array_len == -1:
+            max_array_len = max_buffer_size
+        if max_map_len == -1:
+            max_map_len = max_buffer_size // 2
+        if max_ext_len == -1:
+            max_ext_len = max_buffer_size
+
+        self._max_buffer_size = max_buffer_size
+        if read_size > self._max_buffer_size:
+            raise ValueError("read_size must be smaller than max_buffer_size")
+        self._read_size = read_size or min(self._max_buffer_size, 16 * 1024)
+        self._raw = bool(raw)
+        self._strict_map_key = bool(strict_map_key)
+        self._unicode_errors = unicode_errors
+        self._use_list = use_list
+        if not (0 <= timestamp <= 3):
+            raise ValueError("timestamp must be 0..3")
+        self._timestamp = timestamp
+        self._list_hook = list_hook
+        self._object_hook = object_hook
+        self._object_pairs_hook = object_pairs_hook
+        self._ext_hook = ext_hook
+        self._max_str_len = max_str_len
+        self._max_bin_len = max_bin_len
+        self._max_array_len = max_array_len
+        self._max_map_len = max_map_len
+        self._max_ext_len = max_ext_len
+        self._stream_offset = 0
+
+        if list_hook is not None and not callable(list_hook):
+            raise TypeError("`list_hook` is not callable")
+        if object_hook is not None and not callable(object_hook):
+            raise TypeError("`object_hook` is not callable")
+        if object_pairs_hook is not None and not callable(object_pairs_hook):
+            raise TypeError("`object_pairs_hook` is not callable")
+        if object_hook is not None and object_pairs_hook is not None:
+            raise TypeError(
+                "object_pairs_hook and object_hook are mutually " "exclusive"
+            )
+        if not callable(ext_hook):
+            raise TypeError("`ext_hook` is not callable")
+
+    def feed(self, next_bytes):
+        assert self._feeding
+        view = _get_data_from_buffer(next_bytes)
+        if len(self._buffer) - self._buff_i + len(view) > self._max_buffer_size:
+            raise BufferFull
+
+        # Strip buffer before checkpoint before reading file.
+        if self._buf_checkpoint > 0:
+            del self._buffer[: self._buf_checkpoint]
+            self._buff_i -= self._buf_checkpoint
+            self._buf_checkpoint = 0
+
+        # Use extend here: INPLACE_ADD += doesn't reliably typecast memoryview in jython
+        self._buffer.extend(view)
+
+    def _consume(self):
+        """ Gets rid of the used parts of the buffer. """
+        self._stream_offset += self._buff_i - self._buf_checkpoint
+        self._buf_checkpoint = self._buff_i
+
+    def _got_extradata(self):
+        return self._buff_i < len(self._buffer)
+
+    def _get_extradata(self):
+        return self._buffer[self._buff_i :]
+
+    def read_bytes(self, n):
+        ret = self._read(n)
+        self._consume()
+        return ret
+
+    def _read(self, n):
+        # (int) -> bytearray
+        self._reserve(n)
+        i = self._buff_i
+        self._buff_i = i + n
+        return self._buffer[i : i + n]
+
+    def _reserve(self, n):
+        remain_bytes = len(self._buffer) - self._buff_i - n
+
+        # Fast path: buffer has n bytes already
+        if remain_bytes >= 0:
+            return
+
+        if self._feeding:
+            self._buff_i = self._buf_checkpoint
+            raise OutOfData
+
+        # Strip buffer before checkpoint before reading file.
+        if self._buf_checkpoint > 0:
+            del self._buffer[: self._buf_checkpoint]
+            self._buff_i -= self._buf_checkpoint
+            self._buf_checkpoint = 0
+
+        # Read from file
+        remain_bytes = -remain_bytes
+        while remain_bytes > 0:
+            to_read_bytes = max(self._read_size, remain_bytes)
+            read_data = self.file_like.read(to_read_bytes)
+            if not read_data:
+                break
+            assert isinstance(read_data, bytes)
+            self._buffer += read_data
+            remain_bytes -= len(read_data)
+
+        if len(self._buffer) < n + self._buff_i:
+            self._buff_i = 0  # rollback
+            raise OutOfData
+
+    def _read_header(self, execute=EX_CONSTRUCT):
+        typ = TYPE_IMMEDIATE
+        n = 0
+        obj = None
+        self._reserve(1)
+        b = self._buffer[self._buff_i]
+        self._buff_i += 1
+        if b & 0b10000000 == 0:
+            obj = b
+        elif b & 0b11100000 == 0b11100000:
+            obj = -1 - (b ^ 0xFF)
+        elif b & 0b11100000 == 0b10100000:
+            n = b & 0b00011111
+            typ = TYPE_RAW
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b & 0b11110000 == 0b10010000:
+            n = b & 0b00001111
+            typ = TYPE_ARRAY
+            if n > self._max_array_len:
+                raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
+        elif b & 0b11110000 == 0b10000000:
+            n = b & 0b00001111
+            typ = TYPE_MAP
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
+        elif b == 0xC0:
+            obj = None
+        elif b == 0xC2:
+            obj = False
+        elif b == 0xC3:
+            obj = True
+        elif b == 0xC4:
+            typ = TYPE_BIN
+            self._reserve(1)
+            n = self._buffer[self._buff_i]
+            self._buff_i += 1
+            if n > self._max_bin_len:
+                raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
+            obj = self._read(n)
+        elif b == 0xC5:
+            typ = TYPE_BIN
+            self._reserve(2)
+            n = _unpack_from(">H", self._buffer, self._buff_i)[0]
+            self._buff_i += 2
+            if n > self._max_bin_len:
+                raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
+            obj = self._read(n)
+        elif b == 0xC6:
+            typ = TYPE_BIN
+            self._reserve(4)
+            n = _unpack_from(">I", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+            if n > self._max_bin_len:
+                raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
+            obj = self._read(n)
+        elif b == 0xC7:  # ext 8
+            typ = TYPE_EXT
+            self._reserve(2)
+            L, n = _unpack_from("Bb", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if L > self._max_ext_len:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
+            obj = self._read(L)
+        elif b == 0xC8:  # ext 16
+            typ = TYPE_EXT
+            self._reserve(3)
+            L, n = _unpack_from(">Hb", self._buffer, self._buff_i)
+            self._buff_i += 3
+            if L > self._max_ext_len:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
+            obj = self._read(L)
+        elif b == 0xC9:  # ext 32
+            typ = TYPE_EXT
+            self._reserve(5)
+            L, n = _unpack_from(">Ib", self._buffer, self._buff_i)
+            self._buff_i += 5
+            if L > self._max_ext_len:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
+            obj = self._read(L)
+        elif b == 0xCA:
+            self._reserve(4)
+            obj = _unpack_from(">f", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+        elif b == 0xCB:
+            self._reserve(8)
+            obj = _unpack_from(">d", self._buffer, self._buff_i)[0]
+            self._buff_i += 8
+        elif b == 0xCC:
+            self._reserve(1)
+            obj = self._buffer[self._buff_i]
+            self._buff_i += 1
+        elif b == 0xCD:
+            self._reserve(2)
+            obj = _unpack_from(">H", self._buffer, self._buff_i)[0]
+            self._buff_i += 2
+        elif b == 0xCE:
+            self._reserve(4)
+            obj = _unpack_from(">I", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+        elif b == 0xCF:
+            self._reserve(8)
+            obj = _unpack_from(">Q", self._buffer, self._buff_i)[0]
+            self._buff_i += 8
+        elif b == 0xD0:
+            self._reserve(1)
+            obj = _unpack_from("b", self._buffer, self._buff_i)[0]
+            self._buff_i += 1
+        elif b == 0xD1:
+            self._reserve(2)
+            obj = _unpack_from(">h", self._buffer, self._buff_i)[0]
+            self._buff_i += 2
+        elif b == 0xD2:
+            self._reserve(4)
+            obj = _unpack_from(">i", self._buffer, self._buff_i)[0]
+            self._buff_i += 4
+        elif b == 0xD3:
+            self._reserve(8)
+            obj = _unpack_from(">q", self._buffer, self._buff_i)[0]
+            self._buff_i += 8
+        elif b == 0xD4:  # fixext 1
+            typ = TYPE_EXT
+            if self._max_ext_len < 1:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (1, self._max_ext_len))
+            self._reserve(2)
+            n, obj = _unpack_from("b1s", self._buffer, self._buff_i)
+            self._buff_i += 2
+        elif b == 0xD5:  # fixext 2
+            typ = TYPE_EXT
+            if self._max_ext_len < 2:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (2, self._max_ext_len))
+            self._reserve(3)
+            n, obj = _unpack_from("b2s", self._buffer, self._buff_i)
+            self._buff_i += 3
+        elif b == 0xD6:  # fixext 4
+            typ = TYPE_EXT
+            if self._max_ext_len < 4:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (4, self._max_ext_len))
+            self._reserve(5)
+            n, obj = _unpack_from("b4s", self._buffer, self._buff_i)
+            self._buff_i += 5
+        elif b == 0xD7:  # fixext 8
+            typ = TYPE_EXT
+            if self._max_ext_len < 8:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (8, self._max_ext_len))
+            self._reserve(9)
+            n, obj = _unpack_from("b8s", self._buffer, self._buff_i)
+            self._buff_i += 9
+        elif b == 0xD8:  # fixext 16
+            typ = TYPE_EXT
+            if self._max_ext_len < 16:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (16, self._max_ext_len))
+            self._reserve(17)
+            n, obj = _unpack_from("b16s", self._buffer, self._buff_i)
+            self._buff_i += 17
+        elif b == 0xD9:
+            typ = TYPE_RAW
+            self._reserve(1)
+            n = self._buffer[self._buff_i]
+            self._buff_i += 1
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b == 0xDA:
+            typ = TYPE_RAW
+            self._reserve(2)
+            (n,) = _unpack_from(">H", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b == 0xDB:
+            typ = TYPE_RAW
+            self._reserve(4)
+            (n,) = _unpack_from(">I", self._buffer, self._buff_i)
+            self._buff_i += 4
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)", n, self._max_str_len)
+            obj = self._read(n)
+        elif b == 0xDC:
+            typ = TYPE_ARRAY
+            self._reserve(2)
+            (n,) = _unpack_from(">H", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if n > self._max_array_len:
+                raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
+        elif b == 0xDD:
+            typ = TYPE_ARRAY
+            self._reserve(4)
+            (n,) = _unpack_from(">I", self._buffer, self._buff_i)
+            self._buff_i += 4
+            if n > self._max_array_len:
+                raise ValueError("%s exceeds max_array_len(%s)", n, self._max_array_len)
+        elif b == 0xDE:
+            self._reserve(2)
+            (n,) = _unpack_from(">H", self._buffer, self._buff_i)
+            self._buff_i += 2
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
+            typ = TYPE_MAP
+        elif b == 0xDF:
+            self._reserve(4)
+            (n,) = _unpack_from(">I", self._buffer, self._buff_i)
+            self._buff_i += 4
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)", n, self._max_map_len)
+            typ = TYPE_MAP
+        else:
+            raise FormatError("Unknown header: 0x%x" % b)
+        return typ, n, obj
+
+    def _unpack(self, execute=EX_CONSTRUCT):
+        typ, n, obj = self._read_header(execute)
+
+        if execute == EX_READ_ARRAY_HEADER:
+            if typ != TYPE_ARRAY:
+                raise ValueError("Expected array")
+            return n
+        if execute == EX_READ_MAP_HEADER:
+            if typ != TYPE_MAP:
+                raise ValueError("Expected map")
+            return n
+        # TODO should we eliminate the recursion?
+        if typ == TYPE_ARRAY:
+            if execute == EX_SKIP:
+                for i in xrange(n):
+                    # TODO check whether we need to call `list_hook`
+                    self._unpack(EX_SKIP)
+                return
+            ret = newlist_hint(n)
+            for i in xrange(n):
+                ret.append(self._unpack(EX_CONSTRUCT))
+            if self._list_hook is not None:
+                ret = self._list_hook(ret)
+            # TODO is the interaction between `list_hook` and `use_list` ok?
+            return ret if self._use_list else tuple(ret)
+        if typ == TYPE_MAP:
+            if execute == EX_SKIP:
+                for i in xrange(n):
+                    # TODO check whether we need to call hooks
+                    self._unpack(EX_SKIP)
+                    self._unpack(EX_SKIP)
+                return
+            if self._object_pairs_hook is not None:
+                ret = self._object_pairs_hook(
+                    (self._unpack(EX_CONSTRUCT), self._unpack(EX_CONSTRUCT))
+                    for _ in xrange(n)
+                )
+            else:
+                ret = {}
+                for _ in xrange(n):
+                    key = self._unpack(EX_CONSTRUCT)
+                    if self._strict_map_key and type(key) not in (unicode, bytes):
+                        raise ValueError(
+                            "%s is not allowed for map key" % str(type(key))
+                        )
+                    if not PY2 and type(key) is str:
+                        key = sys.intern(key)
+                    ret[key] = self._unpack(EX_CONSTRUCT)
+                if self._object_hook is not None:
+                    ret = self._object_hook(ret)
+            return ret
+        if execute == EX_SKIP:
+            return
+        if typ == TYPE_RAW:
+            if self._raw:
+                obj = bytes(obj)
+            else:
+                obj = obj.decode("utf_8", self._unicode_errors)
+            return obj
+        if typ == TYPE_BIN:
+            return bytes(obj)
+        if typ == TYPE_EXT:
+            if n == -1:  # timestamp
+                ts = Timestamp.from_bytes(bytes(obj))
+                if self._timestamp == 1:
+                    return ts.to_unix()
+                elif self._timestamp == 2:
+                    return ts.to_unix_nano()
+                elif self._timestamp == 3:
+                    return ts.to_datetime()
+                else:
+                    return ts
+            else:
+                return self._ext_hook(n, bytes(obj))
+        assert typ == TYPE_IMMEDIATE
+        return obj
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        try:
+            ret = self._unpack(EX_CONSTRUCT)
+            self._consume()
+            return ret
+        except OutOfData:
+            self._consume()
+            raise StopIteration
+        except RecursionError:
+            raise StackError
+
+    next = __next__
+
+    def skip(self):
+        self._unpack(EX_SKIP)
+        self._consume()
+
+    def unpack(self):
+        try:
+            ret = self._unpack(EX_CONSTRUCT)
+        except RecursionError:
+            raise StackError
+        self._consume()
+        return ret
+
+    def read_array_header(self):
+        ret = self._unpack(EX_READ_ARRAY_HEADER)
+        self._consume()
+        return ret
+
+    def read_map_header(self):
+        ret = self._unpack(EX_READ_MAP_HEADER)
+        self._consume()
+        return ret
+
+    def tell(self):
+        return self._stream_offset
+
+
+class Packer(object):
+    """
+    MessagePack Packer
+
+    Usage:
+
+        packer = Packer()
+        astream.write(packer.pack(a))
+        astream.write(packer.pack(b))
+
+    Packer's constructor has some keyword arguments:
+
+    :param callable default:
+        Convert user type to builtin type that Packer supports.
+        See also simplejson's document.
+
+    :param bool use_single_float:
+        Use single precision float type for float. (default: False)
+
+    :param bool autoreset:
+        Reset buffer after each pack and return its content as `bytes`. (default: True).
+        If set this to false, use `bytes()` to get content and `.reset()` to clear buffer.
+
+    :param bool use_bin_type:
+        Use bin type introduced in msgpack spec 2.0 for bytes.
+        It also enables str8 type for unicode. (default: True)
+
+    :param bool strict_types:
+        If set to true, types will be checked to be exact. Derived classes
+        from serializable types will not be serialized and will be
+        treated as unsupported type and forwarded to default.
+        Additionally tuples will not be serialized as lists.
+        This is useful when trying to implement accurate serialization
+        for python types.
+
+    :param bool datetime:
+        If set to true, datetime with tzinfo is packed into Timestamp type.
+        Note that the tzinfo is stripped in the timestamp.
+        You can get UTC datetime with `timestamp=3` option of the Unpacker.
+        (Python 2 is not supported).
+
+    :param str unicode_errors:
+        The error handler for encoding unicode. (default: 'strict')
+        DO NOT USE THIS!!  This option is kept for very specific usage.
+    """
+
+    def __init__(
+        self,
+        default=None,
+        use_single_float=False,
+        autoreset=True,
+        use_bin_type=True,
+        strict_types=False,
+        datetime=False,
+        unicode_errors=None,
+    ):
+        self._strict_types = strict_types
+        self._use_float = use_single_float
+        self._autoreset = autoreset
+        self._use_bin_type = use_bin_type
+        self._buffer = StringIO()
+        if PY2 and datetime:
+            raise ValueError("datetime is not supported in Python 2")
+        self._datetime = bool(datetime)
+        self._unicode_errors = unicode_errors or "strict"
+        if default is not None:
+            if not callable(default):
+                raise TypeError("default must be callable")
+        self._default = default
+
+    def _pack(
+        self,
+        obj,
+        nest_limit=DEFAULT_RECURSE_LIMIT,
+        check=isinstance,
+        check_type_strict=_check_type_strict,
+    ):
+        default_used = False
+        if self._strict_types:
+            check = check_type_strict
+            list_types = list
+        else:
+            list_types = (list, tuple)
+        while True:
+            if nest_limit < 0:
+                raise ValueError("recursion limit exceeded")
+            if obj is None:
+                return self._buffer.write(b"\xc0")
+            if check(obj, bool):
+                if obj:
+                    return self._buffer.write(b"\xc3")
+                return self._buffer.write(b"\xc2")
+            if check(obj, int_types):
+                if 0 <= obj < 0x80:
+                    return self._buffer.write(struct.pack("B", obj))
+                if -0x20 <= obj < 0:
+                    return self._buffer.write(struct.pack("b", obj))
+                if 0x80 <= obj <= 0xFF:
+                    return self._buffer.write(struct.pack("BB", 0xCC, obj))
+                if -0x80 <= obj < 0:
+                    return self._buffer.write(struct.pack(">Bb", 0xD0, obj))
+                if 0xFF < obj <= 0xFFFF:
+                    return self._buffer.write(struct.pack(">BH", 0xCD, obj))
+                if -0x8000 <= obj < -0x80:
+                    return self._buffer.write(struct.pack(">Bh", 0xD1, obj))
+                if 0xFFFF < obj <= 0xFFFFFFFF:
+                    return self._buffer.write(struct.pack(">BI", 0xCE, obj))
+                if -0x80000000 <= obj < -0x8000:
+                    return self._buffer.write(struct.pack(">Bi", 0xD2, obj))
+                if 0xFFFFFFFF < obj <= 0xFFFFFFFFFFFFFFFF:
+                    return self._buffer.write(struct.pack(">BQ", 0xCF, obj))
+                if -0x8000000000000000 <= obj < -0x80000000:
+                    return self._buffer.write(struct.pack(">Bq", 0xD3, obj))
+                if not default_used and self._default is not None:
+                    obj = self._default(obj)
+                    default_used = True
+                    continue
+                raise OverflowError("Integer value out of range")
+            if check(obj, (bytes, bytearray)):
+                n = len(obj)
+                if n >= 2 ** 32:
+                    raise ValueError("%s is too large" % type(obj).__name__)
+                self._pack_bin_header(n)
+                return self._buffer.write(obj)
+            if check(obj, unicode):
+                obj = obj.encode("utf-8", self._unicode_errors)
+                n = len(obj)
+                if n >= 2 ** 32:
+                    raise ValueError("String is too large")
+                self._pack_raw_header(n)
+                return self._buffer.write(obj)
+            if check(obj, memoryview):
+                n = len(obj) * obj.itemsize
+                if n >= 2 ** 32:
+                    raise ValueError("Memoryview is too large")
+                self._pack_bin_header(n)
+                return self._buffer.write(obj)
+            if check(obj, float):
+                if self._use_float:
+                    return self._buffer.write(struct.pack(">Bf", 0xCA, obj))
+                return self._buffer.write(struct.pack(">Bd", 0xCB, obj))
+            if check(obj, (ExtType, Timestamp)):
+                if check(obj, Timestamp):
+                    code = -1
+                    data = obj.to_bytes()
+                else:
+                    code = obj.code
+                    data = obj.data
+                assert isinstance(code, int)
+                assert isinstance(data, bytes)
+                L = len(data)
+                if L == 1:
+                    self._buffer.write(b"\xd4")
+                elif L == 2:
+                    self._buffer.write(b"\xd5")
+                elif L == 4:
+                    self._buffer.write(b"\xd6")
+                elif L == 8:
+                    self._buffer.write(b"\xd7")
+                elif L == 16:
+                    self._buffer.write(b"\xd8")
+                elif L <= 0xFF:
+                    self._buffer.write(struct.pack(">BB", 0xC7, L))
+                elif L <= 0xFFFF:
+                    self._buffer.write(struct.pack(">BH", 0xC8, L))
+                else:
+                    self._buffer.write(struct.pack(">BI", 0xC9, L))
+                self._buffer.write(struct.pack("b", code))
+                self._buffer.write(data)
+                return
+            if check(obj, list_types):
+                n = len(obj)
+                self._pack_array_header(n)
+                for i in xrange(n):
+                    self._pack(obj[i], nest_limit - 1)
+                return
+            if check(obj, dict):
+                return self._pack_map_pairs(
+                    len(obj), dict_iteritems(obj), nest_limit - 1
+                )
+
+            if self._datetime and check(obj, _DateTime):
+                obj = Timestamp.from_datetime(obj)
+                default_used = 1
+                continue
+
+            if not default_used and self._default is not None:
+                obj = self._default(obj)
+                default_used = 1
+                continue
+            raise TypeError("Cannot serialize %r" % (obj,))
+
+    def pack(self, obj):
+        try:
+            self._pack(obj)
+        except:
+            self._buffer = StringIO()  # force reset
+            raise
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_map_pairs(self, pairs):
+        self._pack_map_pairs(len(pairs), pairs)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_array_header(self, n):
+        if n >= 2 ** 32:
+            raise ValueError
+        self._pack_array_header(n)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_map_header(self, n):
+        if n >= 2 ** 32:
+            raise ValueError
+        self._pack_map_header(n)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_ext_type(self, typecode, data):
+        if not isinstance(typecode, int):
+            raise TypeError("typecode must have int type.")
+        if not 0 <= typecode <= 127:
+            raise ValueError("typecode should be 0-127")
+        if not isinstance(data, bytes):
+            raise TypeError("data must have bytes type")
+        L = len(data)
+        if L > 0xFFFFFFFF:
+            raise ValueError("Too large data")
+        if L == 1:
+            self._buffer.write(b"\xd4")
+        elif L == 2:
+            self._buffer.write(b"\xd5")
+        elif L == 4:
+            self._buffer.write(b"\xd6")
+        elif L == 8:
+            self._buffer.write(b"\xd7")
+        elif L == 16:
+            self._buffer.write(b"\xd8")
+        elif L <= 0xFF:
+            self._buffer.write(b"\xc7" + struct.pack("B", L))
+        elif L <= 0xFFFF:
+            self._buffer.write(b"\xc8" + struct.pack(">H", L))
+        else:
+            self._buffer.write(b"\xc9" + struct.pack(">I", L))
+        self._buffer.write(struct.pack("B", typecode))
+        self._buffer.write(data)
+
+    def _pack_array_header(self, n):
+        if n <= 0x0F:
+            return self._buffer.write(struct.pack("B", 0x90 + n))
+        if n <= 0xFFFF:
+            return self._buffer.write(struct.pack(">BH", 0xDC, n))
+        if n <= 0xFFFFFFFF:
+            return self._buffer.write(struct.pack(">BI", 0xDD, n))
+        raise ValueError("Array is too large")
+
+    def _pack_map_header(self, n):
+        if n <= 0x0F:
+            return self._buffer.write(struct.pack("B", 0x80 + n))
+        if n <= 0xFFFF:
+            return self._buffer.write(struct.pack(">BH", 0xDE, n))
+        if n <= 0xFFFFFFFF:
+            return self._buffer.write(struct.pack(">BI", 0xDF, n))
+        raise ValueError("Dict is too large")
+
+    def _pack_map_pairs(self, n, pairs, nest_limit=DEFAULT_RECURSE_LIMIT):
+        self._pack_map_header(n)
+        for (k, v) in pairs:
+            self._pack(k, nest_limit - 1)
+            self._pack(v, nest_limit - 1)
+
+    def _pack_raw_header(self, n):
+        if n <= 0x1F:
+            self._buffer.write(struct.pack("B", 0xA0 + n))
+        elif self._use_bin_type and n <= 0xFF:
+            self._buffer.write(struct.pack(">BB", 0xD9, n))
+        elif n <= 0xFFFF:
+            self._buffer.write(struct.pack(">BH", 0xDA, n))
+        elif n <= 0xFFFFFFFF:
+            self._buffer.write(struct.pack(">BI", 0xDB, n))
+        else:
+            raise ValueError("Raw is too large")
+
+    def _pack_bin_header(self, n):
+        if not self._use_bin_type:
+            return self._pack_raw_header(n)
+        elif n <= 0xFF:
+            return self._buffer.write(struct.pack(">BB", 0xC4, n))
+        elif n <= 0xFFFF:
+            return self._buffer.write(struct.pack(">BH", 0xC5, n))
+        elif n <= 0xFFFFFFFF:
+            return self._buffer.write(struct.pack(">BI", 0xC6, n))
+        else:
+            raise ValueError("Bin is too large")
+
+    def bytes(self):
+        """Return internal buffer contents as bytes object"""
+        return self._buffer.getvalue()
+
+    def reset(self):
+        """Reset internal buffer.
+
+        This method is useful only when autoreset=False.
+        """
+        self._buffer = StringIO()
+
+    def getbuffer(self):
+        """Return view of internal buffer."""
+        if USING_STRINGBUILDER or PY2:
+            return memoryview(self.bytes())
+        else:
+            return self._buffer.getbuffer()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/__about__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/__about__.py
new file mode 100644
index 0000000..4d99857
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/__about__.py
@@ -0,0 +1,27 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+__all__ = [
+    "__title__",
+    "__summary__",
+    "__uri__",
+    "__version__",
+    "__author__",
+    "__email__",
+    "__license__",
+    "__copyright__",
+]
+
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
+
+__version__ = "20.4"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD-2-Clause or Apache-2.0"
+__copyright__ = "Copyright 2014-2019 %s" % __author__
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/__init__.py
new file mode 100644
index 0000000..a0cf67d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/__init__.py
@@ -0,0 +1,26 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+from .__about__ import (
+    __author__,
+    __copyright__,
+    __email__,
+    __license__,
+    __summary__,
+    __title__,
+    __uri__,
+    __version__,
+)
+
+__all__ = [
+    "__title__",
+    "__summary__",
+    "__uri__",
+    "__version__",
+    "__author__",
+    "__email__",
+    "__license__",
+    "__copyright__",
+]
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/_compat.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/_compat.py
new file mode 100644
index 0000000..e54bd4e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/_compat.py
@@ -0,0 +1,38 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import sys
+
+from ._typing import TYPE_CHECKING
+
+if TYPE_CHECKING:  # pragma: no cover
+    from typing import Any, Dict, Tuple, Type
+
+
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+
+# flake8: noqa
+
+if PY3:
+    string_types = (str,)
+else:
+    string_types = (basestring,)
+
+
+def with_metaclass(meta, *bases):
+    # type: (Type[Any], Tuple[Type[Any], ...]) -> Any
+    """
+    Create a base class with a metaclass.
+    """
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):  # type: ignore
+        def __new__(cls, name, this_bases, d):
+            # type: (Type[Any], str, Tuple[Any], Dict[Any, Any]) -> Any
+            return meta(name, bases, d)
+
+    return type.__new__(metaclass, "temporary_class", (), {})
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/_structures.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/_structures.py
new file mode 100644
index 0000000..800d5c5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/_structures.py
@@ -0,0 +1,86 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+
+class InfinityType(object):
+    def __repr__(self):
+        # type: () -> str
+        return "Infinity"
+
+    def __hash__(self):
+        # type: () -> int
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        # type: (object) -> bool
+        return False
+
+    def __le__(self, other):
+        # type: (object) -> bool
+        return False
+
+    def __eq__(self, other):
+        # type: (object) -> bool
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        # type: (object) -> bool
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        # type: (object) -> bool
+        return True
+
+    def __ge__(self, other):
+        # type: (object) -> bool
+        return True
+
+    def __neg__(self):
+        # type: (object) -> NegativeInfinityType
+        return NegativeInfinity
+
+
+Infinity = InfinityType()
+
+
+class NegativeInfinityType(object):
+    def __repr__(self):
+        # type: () -> str
+        return "-Infinity"
+
+    def __hash__(self):
+        # type: () -> int
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        # type: (object) -> bool
+        return True
+
+    def __le__(self, other):
+        # type: (object) -> bool
+        return True
+
+    def __eq__(self, other):
+        # type: (object) -> bool
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        # type: (object) -> bool
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        # type: (object) -> bool
+        return False
+
+    def __ge__(self, other):
+        # type: (object) -> bool
+        return False
+
+    def __neg__(self):
+        # type: (object) -> InfinityType
+        return Infinity
+
+
+NegativeInfinity = NegativeInfinityType()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/_typing.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/_typing.py
new file mode 100644
index 0000000..2846133
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/_typing.py
@@ -0,0 +1,48 @@
+"""For neatly implementing static typing in packaging.
+
+`mypy` - the static type analysis tool we use - uses the `typing` module, which
+provides core functionality fundamental to mypy's functioning.
+
+Generally, `typing` would be imported at runtime and used in that fashion -
+it acts as a no-op at runtime and does not have any run-time overhead by
+design.
+
+As it turns out, `typing` is not vendorable - it uses separate sources for
+Python 2/Python 3. Thus, this codebase can not expect it to be present.
+To work around this, mypy allows the typing import to be behind a False-y
+optional to prevent it from running at runtime and type-comments can be used
+to remove the need for the types to be accessible directly during runtime.
+
+This module provides the False-y guard in a nicely named fashion so that a
+curious maintainer can reach here to read this.
+
+In packaging, all static-typing related imports should be guarded as follows:
+
+    from pip._vendor.packaging._typing import TYPE_CHECKING
+
+    if TYPE_CHECKING:
+        from typing import ...
+
+Ref: https://github.com/python/mypy/issues/3216
+"""
+
+__all__ = ["TYPE_CHECKING", "cast"]
+
+# The TYPE_CHECKING constant defined by the typing module is False at runtime
+# but True while type checking.
+if False:  # pragma: no cover
+    from typing import TYPE_CHECKING
+else:
+    TYPE_CHECKING = False
+
+# typing's cast syntax requires calling typing.cast at runtime, but we don't
+# want to import typing at runtime. Here, we inform the type checkers that
+# we're importing `typing.cast` as `cast` and re-implement typing.cast's
+# runtime behavior in a block that is ignored by type checkers.
+if TYPE_CHECKING:  # pragma: no cover
+    # not executed at runtime
+    from typing import cast
+else:
+    # executed at runtime
+    def cast(type_, value):  # noqa
+        return value
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/markers.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/markers.py
new file mode 100644
index 0000000..ed642b0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/markers.py
@@ -0,0 +1,328 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import operator
+import os
+import platform
+import sys
+
+from pip._vendor.pyparsing import ParseException, ParseResults, stringStart, stringEnd
+from pip._vendor.pyparsing import ZeroOrMore, Group, Forward, QuotedString
+from pip._vendor.pyparsing import Literal as L  # noqa
+
+from ._compat import string_types
+from ._typing import TYPE_CHECKING
+from .specifiers import Specifier, InvalidSpecifier
+
+if TYPE_CHECKING:  # pragma: no cover
+    from typing import Any, Callable, Dict, List, Optional, Tuple, Union
+
+    Operator = Callable[[str, str], bool]
+
+
+__all__ = [
+    "InvalidMarker",
+    "UndefinedComparison",
+    "UndefinedEnvironmentName",
+    "Marker",
+    "default_environment",
+]
+
+
+class InvalidMarker(ValueError):
+    """
+    An invalid marker was found, users should refer to PEP 508.
+    """
+
+
+class UndefinedComparison(ValueError):
+    """
+    An invalid operation was attempted on a value that doesn't support it.
+    """
+
+
+class UndefinedEnvironmentName(ValueError):
+    """
+    A name was attempted to be used that does not exist inside of the
+    environment.
+    """
+
+
+class Node(object):
+    def __init__(self, value):
+        # type: (Any) -> None
+        self.value = value
+
+    def __str__(self):
+        # type: () -> str
+        return str(self.value)
+
+    def __repr__(self):
+        # type: () -> str
+        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
+
+    def serialize(self):
+        # type: () -> str
+        raise NotImplementedError
+
+
+class Variable(Node):
+    def serialize(self):
+        # type: () -> str
+        return str(self)
+
+
+class Value(Node):
+    def serialize(self):
+        # type: () -> str
+        return '"{0}"'.format(self)
+
+
+class Op(Node):
+    def serialize(self):
+        # type: () -> str
+        return str(self)
+
+
+VARIABLE = (
+    L("implementation_version")
+    | L("platform_python_implementation")
+    | L("implementation_name")
+    | L("python_full_version")
+    | L("platform_release")
+    | L("platform_version")
+    | L("platform_machine")
+    | L("platform_system")
+    | L("python_version")
+    | L("sys_platform")
+    | L("os_name")
+    | L("os.name")  # PEP-345
+    | L("sys.platform")  # PEP-345
+    | L("platform.version")  # PEP-345
+    | L("platform.machine")  # PEP-345
+    | L("platform.python_implementation")  # PEP-345
+    | L("python_implementation")  # undocumented setuptools legacy
+    | L("extra")  # PEP-508
+)
+ALIASES = {
+    "os.name": "os_name",
+    "sys.platform": "sys_platform",
+    "platform.version": "platform_version",
+    "platform.machine": "platform_machine",
+    "platform.python_implementation": "platform_python_implementation",
+    "python_implementation": "platform_python_implementation",
+}
+VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
+
+VERSION_CMP = (
+    L("===") | L("==") | L(">=") | L("<=") | L("!=") | L("~=") | L(">") | L("<")
+)
+
+MARKER_OP = VERSION_CMP | L("not in") | L("in")
+MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
+
+MARKER_VALUE = QuotedString("'") | QuotedString('"')
+MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
+
+BOOLOP = L("and") | L("or")
+
+MARKER_VAR = VARIABLE | MARKER_VALUE
+
+MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
+MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
+
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+
+MARKER_EXPR = Forward()
+MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
+MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
+
+MARKER = stringStart + MARKER_EXPR + stringEnd
+
+
+def _coerce_parse_result(results):
+    # type: (Union[ParseResults, List[Any]]) -> List[Any]
+    if isinstance(results, ParseResults):
+        return [_coerce_parse_result(i) for i in results]
+    else:
+        return results
+
+
+def _format_marker(marker, first=True):
+    # type: (Union[List[str], Tuple[Node, ...], str], Optional[bool]) -> str
+
+    assert isinstance(marker, (list, tuple, string_types))
+
+    # Sometimes we have a structure like [[...]] which is a single item list
+    # where the single item is itself it's own list. In that case we want skip
+    # the rest of this function so that we don't get extraneous () on the
+    # outside.
+    if (
+        isinstance(marker, list)
+        and len(marker) == 1
+        and isinstance(marker[0], (list, tuple))
+    ):
+        return _format_marker(marker[0])
+
+    if isinstance(marker, list):
+        inner = (_format_marker(m, first=False) for m in marker)
+        if first:
+            return " ".join(inner)
+        else:
+            return "(" + " ".join(inner) + ")"
+    elif isinstance(marker, tuple):
+        return " ".join([m.serialize() for m in marker])
+    else:
+        return marker
+
+
+_operators = {
+    "in": lambda lhs, rhs: lhs in rhs,
+    "not in": lambda lhs, rhs: lhs not in rhs,
+    "<": operator.lt,
+    "<=": operator.le,
+    "==": operator.eq,
+    "!=": operator.ne,
+    ">=": operator.ge,
+    ">": operator.gt,
+}  # type: Dict[str, Operator]
+
+
+def _eval_op(lhs, op, rhs):
+    # type: (str, Op, str) -> bool
+    try:
+        spec = Specifier("".join([op.serialize(), rhs]))
+    except InvalidSpecifier:
+        pass
+    else:
+        return spec.contains(lhs)
+
+    oper = _operators.get(op.serialize())  # type: Optional[Operator]
+    if oper is None:
+        raise UndefinedComparison(
+            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
+        )
+
+    return oper(lhs, rhs)
+
+
+class Undefined(object):
+    pass
+
+
+_undefined = Undefined()
+
+
+def _get_env(environment, name):
+    # type: (Dict[str, str], str) -> str
+    value = environment.get(name, _undefined)  # type: Union[str, Undefined]
+
+    if isinstance(value, Undefined):
+        raise UndefinedEnvironmentName(
+            "{0!r} does not exist in evaluation environment.".format(name)
+        )
+
+    return value
+
+
+def _evaluate_markers(markers, environment):
+    # type: (List[Any], Dict[str, str]) -> bool
+    groups = [[]]  # type: List[List[bool]]
+
+    for marker in markers:
+        assert isinstance(marker, (list, tuple, string_types))
+
+        if isinstance(marker, list):
+            groups[-1].append(_evaluate_markers(marker, environment))
+        elif isinstance(marker, tuple):
+            lhs, op, rhs = marker
+
+            if isinstance(lhs, Variable):
+                lhs_value = _get_env(environment, lhs.value)
+                rhs_value = rhs.value
+            else:
+                lhs_value = lhs.value
+                rhs_value = _get_env(environment, rhs.value)
+
+            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
+        else:
+            assert marker in ["and", "or"]
+            if marker == "or":
+                groups.append([])
+
+    return any(all(item) for item in groups)
+
+
+def format_full_version(info):
+    # type: (sys._version_info) -> str
+    version = "{0.major}.{0.minor}.{0.micro}".format(info)
+    kind = info.releaselevel
+    if kind != "final":
+        version += kind[0] + str(info.serial)
+    return version
+
+
+def default_environment():
+    # type: () -> Dict[str, str]
+    if hasattr(sys, "implementation"):
+        # Ignoring the `sys.implementation` reference for type checking due to
+        # mypy not liking that the attribute doesn't exist in Python 2.7 when
+        # run with the `--py27` flag.
+        iver = format_full_version(sys.implementation.version)  # type: ignore
+        implementation_name = sys.implementation.name  # type: ignore
+    else:
+        iver = "0"
+        implementation_name = ""
+
+    return {
+        "implementation_name": implementation_name,
+        "implementation_version": iver,
+        "os_name": os.name,
+        "platform_machine": platform.machine(),
+        "platform_release": platform.release(),
+        "platform_system": platform.system(),
+        "platform_version": platform.version(),
+        "python_full_version": platform.python_version(),
+        "platform_python_implementation": platform.python_implementation(),
+        "python_version": ".".join(platform.python_version_tuple()[:2]),
+        "sys_platform": sys.platform,
+    }
+
+
+class Marker(object):
+    def __init__(self, marker):
+        # type: (str) -> None
+        try:
+            self._markers = _coerce_parse_result(MARKER.parseString(marker))
+        except ParseException as e:
+            err_str = "Invalid marker: {0!r}, parse error at {1!r}".format(
+                marker, marker[e.loc : e.loc + 8]
+            )
+            raise InvalidMarker(err_str)
+
+    def __str__(self):
+        # type: () -> str
+        return _format_marker(self._markers)
+
+    def __repr__(self):
+        # type: () -> str
+        return "<Marker({0!r})>".format(str(self))
+
+    def evaluate(self, environment=None):
+        # type: (Optional[Dict[str, str]]) -> bool
+        """Evaluate a marker.
+
+        Return the boolean from evaluating the given marker against the
+        environment. environment is an optional argument to override all or
+        part of the determined environment.
+
+        The environment is determined from the current Python process.
+        """
+        current_environment = default_environment()
+        if environment is not None:
+            current_environment.update(environment)
+
+        return _evaluate_markers(self._markers, current_environment)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/requirements.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/requirements.py
new file mode 100644
index 0000000..5e64101
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/requirements.py
@@ -0,0 +1,145 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import string
+import re
+
+from pip._vendor.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
+from pip._vendor.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
+from pip._vendor.pyparsing import Literal as L  # noqa
+from pip._vendor.six.moves.urllib import parse as urlparse
+
+from ._typing import TYPE_CHECKING
+from .markers import MARKER_EXPR, Marker
+from .specifiers import LegacySpecifier, Specifier, SpecifierSet
+
+if TYPE_CHECKING:  # pragma: no cover
+    from typing import List
+
+
+class InvalidRequirement(ValueError):
+    """
+    An invalid requirement was found, users should refer to PEP 508.
+    """
+
+
+ALPHANUM = Word(string.ascii_letters + string.digits)
+
+LBRACKET = L("[").suppress()
+RBRACKET = L("]").suppress()
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+COMMA = L(",").suppress()
+SEMICOLON = L(";").suppress()
+AT = L("@").suppress()
+
+PUNCTUATION = Word("-_.")
+IDENTIFIER_END = ALPHANUM | (ZeroOrMore(PUNCTUATION) + ALPHANUM)
+IDENTIFIER = Combine(ALPHANUM + ZeroOrMore(IDENTIFIER_END))
+
+NAME = IDENTIFIER("name")
+EXTRA = IDENTIFIER
+
+URI = Regex(r"[^ ]+")("url")
+URL = AT + URI
+
+EXTRAS_LIST = EXTRA + ZeroOrMore(COMMA + EXTRA)
+EXTRAS = (LBRACKET + Optional(EXTRAS_LIST) + RBRACKET)("extras")
+
+VERSION_PEP440 = Regex(Specifier._regex_str, re.VERBOSE | re.IGNORECASE)
+VERSION_LEGACY = Regex(LegacySpecifier._regex_str, re.VERBOSE | re.IGNORECASE)
+
+VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
+VERSION_MANY = Combine(
+    VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE), joinString=",", adjacent=False
+)("_raw_spec")
+_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
+_VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or "")
+
+VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
+VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
+
+MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
+MARKER_EXPR.setParseAction(
+    lambda s, l, t: Marker(s[t._original_start : t._original_end])
+)
+MARKER_SEPARATOR = SEMICOLON
+MARKER = MARKER_SEPARATOR + MARKER_EXPR
+
+VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
+URL_AND_MARKER = URL + Optional(MARKER)
+
+NAMED_REQUIREMENT = NAME + Optional(EXTRAS) + (URL_AND_MARKER | VERSION_AND_MARKER)
+
+REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
+# pyparsing isn't thread safe during initialization, so we do it eagerly, see
+# issue #104
+REQUIREMENT.parseString("x[]")
+
+
+class Requirement(object):
+    """Parse a requirement.
+
+    Parse a given requirement string into its parts, such as name, specifier,
+    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
+    string.
+    """
+
+    # TODO: Can we test whether something is contained within a requirement?
+    #       If so how do we do that? Do we need to test against the _name_ of
+    #       the thing as well as the version? What about the markers?
+    # TODO: Can we normalize the name and extra name?
+
+    def __init__(self, requirement_string):
+        # type: (str) -> None
+        try:
+            req = REQUIREMENT.parseString(requirement_string)
+        except ParseException as e:
+            raise InvalidRequirement(
+                'Parse error at "{0!r}": {1}'.format(
+                    requirement_string[e.loc : e.loc + 8], e.msg
+                )
+            )
+
+        self.name = req.name
+        if req.url:
+            parsed_url = urlparse.urlparse(req.url)
+            if parsed_url.scheme == "file":
+                if urlparse.urlunparse(parsed_url) != req.url:
+                    raise InvalidRequirement("Invalid URL given")
+            elif not (parsed_url.scheme and parsed_url.netloc) or (
+                not parsed_url.scheme and not parsed_url.netloc
+            ):
+                raise InvalidRequirement("Invalid URL: {0}".format(req.url))
+            self.url = req.url
+        else:
+            self.url = None
+        self.extras = set(req.extras.asList() if req.extras else [])
+        self.specifier = SpecifierSet(req.specifier)
+        self.marker = req.marker if req.marker else None
+
+    def __str__(self):
+        # type: () -> str
+        parts = [self.name]  # type: List[str]
+
+        if self.extras:
+            parts.append("[{0}]".format(",".join(sorted(self.extras))))
+
+        if self.specifier:
+            parts.append(str(self.specifier))
+
+        if self.url:
+            parts.append("@ {0}".format(self.url))
+            if self.marker:
+                parts.append(" ")
+
+        if self.marker:
+            parts.append("; {0}".format(self.marker))
+
+        return "".join(parts)
+
+    def __repr__(self):
+        # type: () -> str
+        return "<Requirement({0!r})>".format(str(self))
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/specifiers.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/specifiers.py
new file mode 100644
index 0000000..fe09bb1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/specifiers.py
@@ -0,0 +1,863 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import abc
+import functools
+import itertools
+import re
+
+from ._compat import string_types, with_metaclass
+from ._typing import TYPE_CHECKING
+from .utils import canonicalize_version
+from .version import Version, LegacyVersion, parse
+
+if TYPE_CHECKING:  # pragma: no cover
+    from typing import (
+        List,
+        Dict,
+        Union,
+        Iterable,
+        Iterator,
+        Optional,
+        Callable,
+        Tuple,
+        FrozenSet,
+    )
+
+    ParsedVersion = Union[Version, LegacyVersion]
+    UnparsedVersion = Union[Version, LegacyVersion, str]
+    CallableOperator = Callable[[ParsedVersion, str], bool]
+
+
+class InvalidSpecifier(ValueError):
+    """
+    An invalid specifier was found, users should refer to PEP 440.
+    """
+
+
+class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):  # type: ignore
+    @abc.abstractmethod
+    def __str__(self):
+        # type: () -> str
+        """
+        Returns the str representation of this Specifier like object. This
+        should be representative of the Specifier itself.
+        """
+
+    @abc.abstractmethod
+    def __hash__(self):
+        # type: () -> int
+        """
+        Returns a hash value for this Specifier like object.
+        """
+
+    @abc.abstractmethod
+    def __eq__(self, other):
+        # type: (object) -> bool
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are equal.
+        """
+
+    @abc.abstractmethod
+    def __ne__(self, other):
+        # type: (object) -> bool
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are not equal.
+        """
+
+    @abc.abstractproperty
+    def prereleases(self):
+        # type: () -> Optional[bool]
+        """
+        Returns whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @prereleases.setter
+    def prereleases(self, value):
+        # type: (bool) -> None
+        """
+        Sets whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @abc.abstractmethod
+    def contains(self, item, prereleases=None):
+        # type: (str, Optional[bool]) -> bool
+        """
+        Determines if the given item is contained within this specifier.
+        """
+
+    @abc.abstractmethod
+    def filter(self, iterable, prereleases=None):
+        # type: (Iterable[UnparsedVersion], Optional[bool]) -> Iterable[UnparsedVersion]
+        """
+        Takes an iterable of items and filters them so that only items which
+        are contained within this specifier are allowed in it.
+        """
+
+
+class _IndividualSpecifier(BaseSpecifier):
+
+    _operators = {}  # type: Dict[str, str]
+
+    def __init__(self, spec="", prereleases=None):
+        # type: (str, Optional[bool]) -> None
+        match = self._regex.search(spec)
+        if not match:
+            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+
+        self._spec = (
+            match.group("operator").strip(),
+            match.group("version").strip(),
+        )  # type: Tuple[str, str]
+
+        # Store whether or not this Specifier should accept prereleases
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        # type: () -> str
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<{0}({1!r}{2})>".format(self.__class__.__name__, str(self), pre)
+
+    def __str__(self):
+        # type: () -> str
+        return "{0}{1}".format(*self._spec)
+
+    @property
+    def _canonical_spec(self):
+        # type: () -> Tuple[str, Union[Version, str]]
+        return self._spec[0], canonicalize_version(self._spec[1])
+
+    def __hash__(self):
+        # type: () -> int
+        return hash(self._canonical_spec)
+
+    def __eq__(self, other):
+        # type: (object) -> bool
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(str(other))
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._canonical_spec == other._canonical_spec
+
+    def __ne__(self, other):
+        # type: (object) -> bool
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(str(other))
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec != other._spec
+
+    def _get_operator(self, op):
+        # type: (str) -> CallableOperator
+        operator_callable = getattr(
+            self, "_compare_{0}".format(self._operators[op])
+        )  # type: CallableOperator
+        return operator_callable
+
+    def _coerce_version(self, version):
+        # type: (UnparsedVersion) -> ParsedVersion
+        if not isinstance(version, (LegacyVersion, Version)):
+            version = parse(version)
+        return version
+
+    @property
+    def operator(self):
+        # type: () -> str
+        return self._spec[0]
+
+    @property
+    def version(self):
+        # type: () -> str
+        return self._spec[1]
+
+    @property
+    def prereleases(self):
+        # type: () -> Optional[bool]
+        return self._prereleases
+
+    @prereleases.setter
+    def prereleases(self, value):
+        # type: (bool) -> None
+        self._prereleases = value
+
+    def __contains__(self, item):
+        # type: (str) -> bool
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # type: (UnparsedVersion, Optional[bool]) -> bool
+
+        # Determine if prereleases are to be allowed or not.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # Normalize item to a Version or LegacyVersion, this allows us to have
+        # a shortcut for ``"2.0" in Specifier(">=2")
+        normalized_item = self._coerce_version(item)
+
+        # Determine if we should be supporting prereleases in this specifier
+        # or not, if we do not support prereleases than we can short circuit
+        # logic if this version is a prereleases.
+        if normalized_item.is_prerelease and not prereleases:
+            return False
+
+        # Actually do the comparison to determine if this item is contained
+        # within this Specifier or not.
+        operator_callable = self._get_operator(self.operator)  # type: CallableOperator
+        return operator_callable(normalized_item, self.version)
+
+    def filter(self, iterable, prereleases=None):
+        # type: (Iterable[UnparsedVersion], Optional[bool]) -> Iterable[UnparsedVersion]
+
+        yielded = False
+        found_prereleases = []
+
+        kw = {"prereleases": prereleases if prereleases is not None else True}
+
+        # Attempt to iterate over all the values in the iterable and if any of
+        # them match, yield them.
+        for version in iterable:
+            parsed_version = self._coerce_version(version)
+
+            if self.contains(parsed_version, **kw):
+                # If our version is a prerelease, and we were not set to allow
+                # prereleases, then we'll store it for later incase nothing
+                # else matches this specifier.
+                if parsed_version.is_prerelease and not (
+                    prereleases or self.prereleases
+                ):
+                    found_prereleases.append(version)
+                # Either this is not a prerelease, or we should have been
+                # accepting prereleases from the beginning.
+                else:
+                    yielded = True
+                    yield version
+
+        # Now that we've iterated over everything, determine if we've yielded
+        # any values, and if we have not and we have any prereleases stored up
+        # then we will go ahead and yield the prereleases.
+        if not yielded and found_prereleases:
+            for version in found_prereleases:
+                yield version
+
+
+class LegacySpecifier(_IndividualSpecifier):
+
+    _regex_str = r"""
+        (?P<operator>(==|!=|<=|>=|<|>))
+        \s*
+        (?P<version>
+            [^,;\s)]* # Since this is a "legacy" specifier, and the version
+                      # string can be just about anything, we match everything
+                      # except for whitespace, a semi-colon for marker support,
+                      # a closing paren since versions can be enclosed in
+                      # them, and a comma since it's a version separator.
+        )
+        """
+
+    _regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+    }
+
+    def _coerce_version(self, version):
+        # type: (Union[ParsedVersion, str]) -> LegacyVersion
+        if not isinstance(version, LegacyVersion):
+            version = LegacyVersion(str(version))
+        return version
+
+    def _compare_equal(self, prospective, spec):
+        # type: (LegacyVersion, str) -> bool
+        return prospective == self._coerce_version(spec)
+
+    def _compare_not_equal(self, prospective, spec):
+        # type: (LegacyVersion, str) -> bool
+        return prospective != self._coerce_version(spec)
+
+    def _compare_less_than_equal(self, prospective, spec):
+        # type: (LegacyVersion, str) -> bool
+        return prospective <= self._coerce_version(spec)
+
+    def _compare_greater_than_equal(self, prospective, spec):
+        # type: (LegacyVersion, str) -> bool
+        return prospective >= self._coerce_version(spec)
+
+    def _compare_less_than(self, prospective, spec):
+        # type: (LegacyVersion, str) -> bool
+        return prospective < self._coerce_version(spec)
+
+    def _compare_greater_than(self, prospective, spec):
+        # type: (LegacyVersion, str) -> bool
+        return prospective > self._coerce_version(spec)
+
+
+def _require_version_compare(
+    fn  # type: (Callable[[Specifier, ParsedVersion, str], bool])
+):
+    # type: (...) -> Callable[[Specifier, ParsedVersion, str], bool]
+    @functools.wraps(fn)
+    def wrapped(self, prospective, spec):
+        # type: (Specifier, ParsedVersion, str) -> bool
+        if not isinstance(prospective, Version):
+            return False
+        return fn(self, prospective, spec)
+
+    return wrapped
+
+
+class Specifier(_IndividualSpecifier):
+
+    _regex_str = r"""
+        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
+        (?P<version>
+            (?:
+                # The identity operators allow for an escape hatch that will
+                # do an exact string match of the version you wish to install.
+                # This will not be parsed by PEP 440 and we cannot determine
+                # any semantic meaning from it. This operator is discouraged
+                # but included entirely as an escape hatch.
+                (?<====)  # Only match for the identity operator
+                \s*
+                [^\s]*    # We just match everything, except for whitespace
+                          # since we are only testing for strict identity.
+            )
+            |
+            (?:
+                # The (non)equality operators allow for wild card and local
+                # versions to be specified so we have to define these two
+                # operators separately to enable that.
+                (?<===|!=)            # Only match for equals and not equals
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+
+                # You cannot use a wild card and a dev or local version
+                # together so group them with a | and make them optional.
+                (?:
+                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+                    |
+                    \.\*  # Wild card syntax of .*
+                )?
+            )
+            |
+            (?:
+                # The compatible operator requires at least two digits in the
+                # release segment.
+                (?<=~=)               # Only match for the compatible operator
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+            |
+            (?:
+                # All other operators only allow a sub set of what the
+                # (non)equality operators do. Specifically they do not allow
+                # local versions to be specified nor do they allow the prefix
+                # matching wild cards.
+                (?<!==|!=|~=)         # We have special cases for these
+                                      # operators so we want to make sure they
+                                      # don't match here.
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+        )
+        """
+
+    _regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "~=": "compatible",
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+        "===": "arbitrary",
+    }
+
+    @_require_version_compare
+    def _compare_compatible(self, prospective, spec):
+        # type: (ParsedVersion, str) -> bool
+
+        # Compatible releases have an equivalent combination of >= and ==. That
+        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
+        # implement this in terms of the other specifiers instead of
+        # implementing it ourselves. The only thing we need to do is construct
+        # the other specifiers.
+
+        # We want everything but the last item in the version, but we want to
+        # ignore post and dev releases and we want to treat the pre-release as
+        # it's own separate segment.
+        prefix = ".".join(
+            list(
+                itertools.takewhile(
+                    lambda x: (not x.startswith("post") and not x.startswith("dev")),
+                    _version_split(spec),
+                )
+            )[:-1]
+        )
+
+        # Add the prefix notation to the end of our string
+        prefix += ".*"
+
+        return self._get_operator(">=")(prospective, spec) and self._get_operator("==")(
+            prospective, prefix
+        )
+
+    @_require_version_compare
+    def _compare_equal(self, prospective, spec):
+        # type: (ParsedVersion, str) -> bool
+
+        # We need special logic to handle prefix matching
+        if spec.endswith(".*"):
+            # In the case of prefix matching we want to ignore local segment.
+            prospective = Version(prospective.public)
+            # Split the spec out by dots, and pretend that there is an implicit
+            # dot in between a release segment and a pre-release segment.
+            split_spec = _version_split(spec[:-2])  # Remove the trailing .*
+
+            # Split the prospective version out by dots, and pretend that there
+            # is an implicit dot in between a release segment and a pre-release
+            # segment.
+            split_prospective = _version_split(str(prospective))
+
+            # Shorten the prospective version to be the same length as the spec
+            # so that we can determine if the specifier is a prefix of the
+            # prospective version or not.
+            shortened_prospective = split_prospective[: len(split_spec)]
+
+            # Pad out our two sides with zeros so that they both equal the same
+            # length.
+            padded_spec, padded_prospective = _pad_version(
+                split_spec, shortened_prospective
+            )
+
+            return padded_prospective == padded_spec
+        else:
+            # Convert our spec string into a Version
+            spec_version = Version(spec)
+
+            # If the specifier does not have a local segment, then we want to
+            # act as if the prospective version also does not have a local
+            # segment.
+            if not spec_version.local:
+                prospective = Version(prospective.public)
+
+            return prospective == spec_version
+
+    @_require_version_compare
+    def _compare_not_equal(self, prospective, spec):
+        # type: (ParsedVersion, str) -> bool
+        return not self._compare_equal(prospective, spec)
+
+    @_require_version_compare
+    def _compare_less_than_equal(self, prospective, spec):
+        # type: (ParsedVersion, str) -> bool
+
+        # NB: Local version identifiers are NOT permitted in the version
+        # specifier, so local version labels can be universally removed from
+        # the prospective version.
+        return Version(prospective.public) <= Version(spec)
+
+    @_require_version_compare
+    def _compare_greater_than_equal(self, prospective, spec):
+        # type: (ParsedVersion, str) -> bool
+
+        # NB: Local version identifiers are NOT permitted in the version
+        # specifier, so local version labels can be universally removed from
+        # the prospective version.
+        return Version(prospective.public) >= Version(spec)
+
+    @_require_version_compare
+    def _compare_less_than(self, prospective, spec_str):
+        # type: (ParsedVersion, str) -> bool
+
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec_str)
+
+        # Check to see if the prospective version is less than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective < spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a pre-release version, that we do not accept pre-release
+        # versions for the version mentioned in the specifier (e.g. <3.1 should
+        # not match 3.1.dev0, but should match 3.0.dev0).
+        if not spec.is_prerelease and prospective.is_prerelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # less than the spec version *and* it's not a pre-release of the same
+        # version in the spec.
+        return True
+
+    @_require_version_compare
+    def _compare_greater_than(self, prospective, spec_str):
+        # type: (ParsedVersion, str) -> bool
+
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec_str)
+
+        # Check to see if the prospective version is greater than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective > spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a post-release version, that we do not accept
+        # post-release versions for the version mentioned in the specifier
+        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
+        if not spec.is_postrelease and prospective.is_postrelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # Ensure that we do not allow a local version of the version mentioned
+        # in the specifier, which is technically greater than, to match.
+        if prospective.local is not None:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # greater than the spec version *and* it's not a pre-release of the
+        # same version in the spec.
+        return True
+
+    def _compare_arbitrary(self, prospective, spec):
+        # type: (Version, str) -> bool
+        return str(prospective).lower() == str(spec).lower()
+
+    @property
+    def prereleases(self):
+        # type: () -> bool
+
+        # If there is an explicit prereleases set for this, then we'll just
+        # blindly use that.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # Look at all of our specifiers and determine if they are inclusive
+        # operators, and if they are if they are including an explicit
+        # prerelease.
+        operator, version = self._spec
+        if operator in ["==", ">=", "<=", "~=", "==="]:
+            # The == specifier can include a trailing .*, if it does we
+            # want to remove before parsing.
+            if operator == "==" and version.endswith(".*"):
+                version = version[:-2]
+
+            # Parse the version, and if it is a pre-release than this
+            # specifier allows pre-releases.
+            if parse(version).is_prerelease:
+                return True
+
+        return False
+
+    @prereleases.setter
+    def prereleases(self, value):
+        # type: (bool) -> None
+        self._prereleases = value
+
+
+_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
+
+
+def _version_split(version):
+    # type: (str) -> List[str]
+    result = []  # type: List[str]
+    for item in version.split("."):
+        match = _prefix_regex.search(item)
+        if match:
+            result.extend(match.groups())
+        else:
+            result.append(item)
+    return result
+
+
+def _pad_version(left, right):
+    # type: (List[str], List[str]) -> Tuple[List[str], List[str]]
+    left_split, right_split = [], []
+
+    # Get the release segment of our versions
+    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
+    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
+
+    # Get the rest of our versions
+    left_split.append(left[len(left_split[0]) :])
+    right_split.append(right[len(right_split[0]) :])
+
+    # Insert our padding
+    left_split.insert(1, ["0"] * max(0, len(right_split[0]) - len(left_split[0])))
+    right_split.insert(1, ["0"] * max(0, len(left_split[0]) - len(right_split[0])))
+
+    return (list(itertools.chain(*left_split)), list(itertools.chain(*right_split)))
+
+
+class SpecifierSet(BaseSpecifier):
+    def __init__(self, specifiers="", prereleases=None):
+        # type: (str, Optional[bool]) -> None
+
+        # Split on , to break each individual specifier into it's own item, and
+        # strip each item to remove leading/trailing whitespace.
+        split_specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
+
+        # Parsed each individual specifier, attempting first to make it a
+        # Specifier and falling back to a LegacySpecifier.
+        parsed = set()
+        for specifier in split_specifiers:
+            try:
+                parsed.add(Specifier(specifier))
+            except InvalidSpecifier:
+                parsed.add(LegacySpecifier(specifier))
+
+        # Turn our parsed specifiers into a frozen set and save them for later.
+        self._specs = frozenset(parsed)
+
+        # Store our prereleases value so we can use it later to determine if
+        # we accept prereleases or not.
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        # type: () -> str
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+
+    def __str__(self):
+        # type: () -> str
+        return ",".join(sorted(str(s) for s in self._specs))
+
+    def __hash__(self):
+        # type: () -> int
+        return hash(self._specs)
+
+    def __and__(self, other):
+        # type: (Union[SpecifierSet, str]) -> SpecifierSet
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        specifier = SpecifierSet()
+        specifier._specs = frozenset(self._specs | other._specs)
+
+        if self._prereleases is None and other._prereleases is not None:
+            specifier._prereleases = other._prereleases
+        elif self._prereleases is not None and other._prereleases is None:
+            specifier._prereleases = self._prereleases
+        elif self._prereleases == other._prereleases:
+            specifier._prereleases = self._prereleases
+        else:
+            raise ValueError(
+                "Cannot combine SpecifierSets with True and False prerelease "
+                "overrides."
+            )
+
+        return specifier
+
+    def __eq__(self, other):
+        # type: (object) -> bool
+        if isinstance(other, (string_types, _IndividualSpecifier)):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs == other._specs
+
+    def __ne__(self, other):
+        # type: (object) -> bool
+        if isinstance(other, (string_types, _IndividualSpecifier)):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs != other._specs
+
+    def __len__(self):
+        # type: () -> int
+        return len(self._specs)
+
+    def __iter__(self):
+        # type: () -> Iterator[FrozenSet[_IndividualSpecifier]]
+        return iter(self._specs)
+
+    @property
+    def prereleases(self):
+        # type: () -> Optional[bool]
+
+        # If we have been given an explicit prerelease modifier, then we'll
+        # pass that through here.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # If we don't have any specifiers, and we don't have a forced value,
+        # then we'll just return None since we don't know if this should have
+        # pre-releases or not.
+        if not self._specs:
+            return None
+
+        # Otherwise we'll see if any of the given specifiers accept
+        # prereleases, if any of them do we'll return True, otherwise False.
+        return any(s.prereleases for s in self._specs)
+
+    @prereleases.setter
+    def prereleases(self, value):
+        # type: (bool) -> None
+        self._prereleases = value
+
+    def __contains__(self, item):
+        # type: (Union[ParsedVersion, str]) -> bool
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # type: (Union[ParsedVersion, str], Optional[bool]) -> bool
+
+        # Ensure that our item is a Version or LegacyVersion instance.
+        if not isinstance(item, (LegacyVersion, Version)):
+            item = parse(item)
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # We can determine if we're going to allow pre-releases by looking to
+        # see if any of the underlying items supports them. If none of them do
+        # and this item is a pre-release then we do not allow it and we can
+        # short circuit that here.
+        # Note: This means that 1.0.dev1 would not be contained in something
+        #       like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
+        if not prereleases and item.is_prerelease:
+            return False
+
+        # We simply dispatch to the underlying specs here to make sure that the
+        # given version is contained within all of them.
+        # Note: This use of all() here means that an empty set of specifiers
+        #       will always return True, this is an explicit design decision.
+        return all(s.contains(item, prereleases=prereleases) for s in self._specs)
+
+    def filter(
+        self,
+        iterable,  # type: Iterable[Union[ParsedVersion, str]]
+        prereleases=None,  # type: Optional[bool]
+    ):
+        # type: (...) -> Iterable[Union[ParsedVersion, str]]
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # If we have any specifiers, then we want to wrap our iterable in the
+        # filter method for each one, this will act as a logical AND amongst
+        # each specifier.
+        if self._specs:
+            for spec in self._specs:
+                iterable = spec.filter(iterable, prereleases=bool(prereleases))
+            return iterable
+        # If we do not have any specifiers, then we need to have a rough filter
+        # which will filter out any pre-releases, unless there are no final
+        # releases, and which will filter out LegacyVersion in general.
+        else:
+            filtered = []  # type: List[Union[ParsedVersion, str]]
+            found_prereleases = []  # type: List[Union[ParsedVersion, str]]
+
+            for item in iterable:
+                # Ensure that we some kind of Version class for this item.
+                if not isinstance(item, (LegacyVersion, Version)):
+                    parsed_version = parse(item)
+                else:
+                    parsed_version = item
+
+                # Filter out any item which is parsed as a LegacyVersion
+                if isinstance(parsed_version, LegacyVersion):
+                    continue
+
+                # Store any item which is a pre-release for later unless we've
+                # already found a final version or we are accepting prereleases
+                if parsed_version.is_prerelease and not prereleases:
+                    if not filtered:
+                        found_prereleases.append(item)
+                else:
+                    filtered.append(item)
+
+            # If we've found no items except for pre-releases, then we'll go
+            # ahead and use the pre-releases
+            if not filtered and found_prereleases and prereleases is None:
+                return found_prereleases
+
+            return filtered
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/tags.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/tags.py
new file mode 100644
index 0000000..9064910
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/tags.py
@@ -0,0 +1,751 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import
+
+import distutils.util
+
+try:
+    from importlib.machinery import EXTENSION_SUFFIXES
+except ImportError:  # pragma: no cover
+    import imp
+
+    EXTENSION_SUFFIXES = [x[0] for x in imp.get_suffixes()]
+    del imp
+import logging
+import os
+import platform
+import re
+import struct
+import sys
+import sysconfig
+import warnings
+
+from ._typing import TYPE_CHECKING, cast
+
+if TYPE_CHECKING:  # pragma: no cover
+    from typing import (
+        Dict,
+        FrozenSet,
+        IO,
+        Iterable,
+        Iterator,
+        List,
+        Optional,
+        Sequence,
+        Tuple,
+        Union,
+    )
+
+    PythonVersion = Sequence[int]
+    MacVersion = Tuple[int, int]
+    GlibcVersion = Tuple[int, int]
+
+
+logger = logging.getLogger(__name__)
+
+INTERPRETER_SHORT_NAMES = {
+    "python": "py",  # Generic.
+    "cpython": "cp",
+    "pypy": "pp",
+    "ironpython": "ip",
+    "jython": "jy",
+}  # type: Dict[str, str]
+
+
+_32_BIT_INTERPRETER = sys.maxsize <= 2 ** 32
+
+
+class Tag(object):
+    """
+    A representation of the tag triple for a wheel.
+
+    Instances are considered immutable and thus are hashable. Equality checking
+    is also supported.
+    """
+
+    __slots__ = ["_interpreter", "_abi", "_platform"]
+
+    def __init__(self, interpreter, abi, platform):
+        # type: (str, str, str) -> None
+        self._interpreter = interpreter.lower()
+        self._abi = abi.lower()
+        self._platform = platform.lower()
+
+    @property
+    def interpreter(self):
+        # type: () -> str
+        return self._interpreter
+
+    @property
+    def abi(self):
+        # type: () -> str
+        return self._abi
+
+    @property
+    def platform(self):
+        # type: () -> str
+        return self._platform
+
+    def __eq__(self, other):
+        # type: (object) -> bool
+        if not isinstance(other, Tag):
+            return NotImplemented
+
+        return (
+            (self.platform == other.platform)
+            and (self.abi == other.abi)
+            and (self.interpreter == other.interpreter)
+        )
+
+    def __hash__(self):
+        # type: () -> int
+        return hash((self._interpreter, self._abi, self._platform))
+
+    def __str__(self):
+        # type: () -> str
+        return "{}-{}-{}".format(self._interpreter, self._abi, self._platform)
+
+    def __repr__(self):
+        # type: () -> str
+        return "<{self} @ {self_id}>".format(self=self, self_id=id(self))
+
+
+def parse_tag(tag):
+    # type: (str) -> FrozenSet[Tag]
+    """
+    Parses the provided tag (e.g. `py3-none-any`) into a frozenset of Tag instances.
+
+    Returning a set is required due to the possibility that the tag is a
+    compressed tag set.
+    """
+    tags = set()
+    interpreters, abis, platforms = tag.split("-")
+    for interpreter in interpreters.split("."):
+        for abi in abis.split("."):
+            for platform_ in platforms.split("."):
+                tags.add(Tag(interpreter, abi, platform_))
+    return frozenset(tags)
+
+
+def _warn_keyword_parameter(func_name, kwargs):
+    # type: (str, Dict[str, bool]) -> bool
+    """
+    Backwards-compatibility with Python 2.7 to allow treating 'warn' as keyword-only.
+    """
+    if not kwargs:
+        return False
+    elif len(kwargs) > 1 or "warn" not in kwargs:
+        kwargs.pop("warn", None)
+        arg = next(iter(kwargs.keys()))
+        raise TypeError(
+            "{}() got an unexpected keyword argument {!r}".format(func_name, arg)
+        )
+    return kwargs["warn"]
+
+
+def _get_config_var(name, warn=False):
+    # type: (str, bool) -> Union[int, str, None]
+    value = sysconfig.get_config_var(name)
+    if value is None and warn:
+        logger.debug(
+            "Config variable '%s' is unset, Python ABI tag may be incorrect", name
+        )
+    return value
+
+
+def _normalize_string(string):
+    # type: (str) -> str
+    return string.replace(".", "_").replace("-", "_")
+
+
+def _abi3_applies(python_version):
+    # type: (PythonVersion) -> bool
+    """
+    Determine if the Python version supports abi3.
+
+    PEP 384 was first implemented in Python 3.2.
+    """
+    return len(python_version) > 1 and tuple(python_version) >= (3, 2)
+
+
+def _cpython_abis(py_version, warn=False):
+    # type: (PythonVersion, bool) -> List[str]
+    py_version = tuple(py_version)  # To allow for version comparison.
+    abis = []
+    version = _version_nodot(py_version[:2])
+    debug = pymalloc = ucs4 = ""
+    with_debug = _get_config_var("Py_DEBUG", warn)
+    has_refcount = hasattr(sys, "gettotalrefcount")
+    # Windows doesn't set Py_DEBUG, so checking for support of debug-compiled
+    # extension modules is the best option.
+    # https://github.com/pypa/pip/issues/3383#issuecomment-173267692
+    has_ext = "_d.pyd" in EXTENSION_SUFFIXES
+    if with_debug or (with_debug is None and (has_refcount or has_ext)):
+        debug = "d"
+    if py_version < (3, 8):
+        with_pymalloc = _get_config_var("WITH_PYMALLOC", warn)
+        if with_pymalloc or with_pymalloc is None:
+            pymalloc = "m"
+        if py_version < (3, 3):
+            unicode_size = _get_config_var("Py_UNICODE_SIZE", warn)
+            if unicode_size == 4 or (
+                unicode_size is None and sys.maxunicode == 0x10FFFF
+            ):
+                ucs4 = "u"
+    elif debug:
+        # Debug builds can also load "normal" extension modules.
+        # We can also assume no UCS-4 or pymalloc requirement.
+        abis.append("cp{version}".format(version=version))
+    abis.insert(
+        0,
+        "cp{version}{debug}{pymalloc}{ucs4}".format(
+            version=version, debug=debug, pymalloc=pymalloc, ucs4=ucs4
+        ),
+    )
+    return abis
+
+
+def cpython_tags(
+    python_version=None,  # type: Optional[PythonVersion]
+    abis=None,  # type: Optional[Iterable[str]]
+    platforms=None,  # type: Optional[Iterable[str]]
+    **kwargs  # type: bool
+):
+    # type: (...) -> Iterator[Tag]
+    """
+    Yields the tags for a CPython interpreter.
+
+    The tags consist of:
+    - cp<python_version>-<abi>-<platform>
+    - cp<python_version>-abi3-<platform>
+    - cp<python_version>-none-<platform>
+    - cp<less than python_version>-abi3-<platform>  # Older Python versions down to 3.2.
+
+    If python_version only specifies a major version then user-provided ABIs and
+    the 'none' ABItag will be used.
+
+    If 'abi3' or 'none' are specified in 'abis' then they will be yielded at
+    their normal position and not at the beginning.
+    """
+    warn = _warn_keyword_parameter("cpython_tags", kwargs)
+    if not python_version:
+        python_version = sys.version_info[:2]
+
+    interpreter = "cp{}".format(_version_nodot(python_version[:2]))
+
+    if abis is None:
+        if len(python_version) > 1:
+            abis = _cpython_abis(python_version, warn)
+        else:
+            abis = []
+    abis = list(abis)
+    # 'abi3' and 'none' are explicitly handled later.
+    for explicit_abi in ("abi3", "none"):
+        try:
+            abis.remove(explicit_abi)
+        except ValueError:
+            pass
+
+    platforms = list(platforms or _platform_tags())
+    for abi in abis:
+        for platform_ in platforms:
+            yield Tag(interpreter, abi, platform_)
+    if _abi3_applies(python_version):
+        for tag in (Tag(interpreter, "abi3", platform_) for platform_ in platforms):
+            yield tag
+    for tag in (Tag(interpreter, "none", platform_) for platform_ in platforms):
+        yield tag
+
+    if _abi3_applies(python_version):
+        for minor_version in range(python_version[1] - 1, 1, -1):
+            for platform_ in platforms:
+                interpreter = "cp{version}".format(
+                    version=_version_nodot((python_version[0], minor_version))
+                )
+                yield Tag(interpreter, "abi3", platform_)
+
+
+def _generic_abi():
+    # type: () -> Iterator[str]
+    abi = sysconfig.get_config_var("SOABI")
+    if abi:
+        yield _normalize_string(abi)
+
+
+def generic_tags(
+    interpreter=None,  # type: Optional[str]
+    abis=None,  # type: Optional[Iterable[str]]
+    platforms=None,  # type: Optional[Iterable[str]]
+    **kwargs  # type: bool
+):
+    # type: (...) -> Iterator[Tag]
+    """
+    Yields the tags for a generic interpreter.
+
+    The tags consist of:
+    - <interpreter>-<abi>-<platform>
+
+    The "none" ABI will be added if it was not explicitly provided.
+    """
+    warn = _warn_keyword_parameter("generic_tags", kwargs)
+    if not interpreter:
+        interp_name = interpreter_name()
+        interp_version = interpreter_version(warn=warn)
+        interpreter = "".join([interp_name, interp_version])
+    if abis is None:
+        abis = _generic_abi()
+    platforms = list(platforms or _platform_tags())
+    abis = list(abis)
+    if "none" not in abis:
+        abis.append("none")
+    for abi in abis:
+        for platform_ in platforms:
+            yield Tag(interpreter, abi, platform_)
+
+
+def _py_interpreter_range(py_version):
+    # type: (PythonVersion) -> Iterator[str]
+    """
+    Yields Python versions in descending order.
+
+    After the latest version, the major-only version will be yielded, and then
+    all previous versions of that major version.
+    """
+    if len(py_version) > 1:
+        yield "py{version}".format(version=_version_nodot(py_version[:2]))
+    yield "py{major}".format(major=py_version[0])
+    if len(py_version) > 1:
+        for minor in range(py_version[1] - 1, -1, -1):
+            yield "py{version}".format(version=_version_nodot((py_version[0], minor)))
+
+
+def compatible_tags(
+    python_version=None,  # type: Optional[PythonVersion]
+    interpreter=None,  # type: Optional[str]
+    platforms=None,  # type: Optional[Iterable[str]]
+):
+    # type: (...) -> Iterator[Tag]
+    """
+    Yields the sequence of tags that are compatible with a specific version of Python.
+
+    The tags consist of:
+    - py*-none-<platform>
+    - <interpreter>-none-any  # ... if `interpreter` is provided.
+    - py*-none-any
+    """
+    if not python_version:
+        python_version = sys.version_info[:2]
+    platforms = list(platforms or _platform_tags())
+    for version in _py_interpreter_range(python_version):
+        for platform_ in platforms:
+            yield Tag(version, "none", platform_)
+    if interpreter:
+        yield Tag(interpreter, "none", "any")
+    for version in _py_interpreter_range(python_version):
+        yield Tag(version, "none", "any")
+
+
+def _mac_arch(arch, is_32bit=_32_BIT_INTERPRETER):
+    # type: (str, bool) -> str
+    if not is_32bit:
+        return arch
+
+    if arch.startswith("ppc"):
+        return "ppc"
+
+    return "i386"
+
+
+def _mac_binary_formats(version, cpu_arch):
+    # type: (MacVersion, str) -> List[str]
+    formats = [cpu_arch]
+    if cpu_arch == "x86_64":
+        if version < (10, 4):
+            return []
+        formats.extend(["intel", "fat64", "fat32"])
+
+    elif cpu_arch == "i386":
+        if version < (10, 4):
+            return []
+        formats.extend(["intel", "fat32", "fat"])
+
+    elif cpu_arch == "ppc64":
+        # TODO: Need to care about 32-bit PPC for ppc64 through 10.2?
+        if version > (10, 5) or version < (10, 4):
+            return []
+        formats.append("fat64")
+
+    elif cpu_arch == "ppc":
+        if version > (10, 6):
+            return []
+        formats.extend(["fat32", "fat"])
+
+    formats.append("universal")
+    return formats
+
+
+def mac_platforms(version=None, arch=None):
+    # type: (Optional[MacVersion], Optional[str]) -> Iterator[str]
+    """
+    Yields the platform tags for a macOS system.
+
+    The `version` parameter is a two-item tuple specifying the macOS version to
+    generate platform tags for. The `arch` parameter is the CPU architecture to
+    generate platform tags for. Both parameters default to the appropriate value
+    for the current system.
+    """
+    version_str, _, cpu_arch = platform.mac_ver()  # type: ignore
+    if version is None:
+        version = cast("MacVersion", tuple(map(int, version_str.split(".")[:2])))
+    else:
+        version = version
+    if arch is None:
+        arch = _mac_arch(cpu_arch)
+    else:
+        arch = arch
+    for minor_version in range(version[1], -1, -1):
+        compat_version = version[0], minor_version
+        binary_formats = _mac_binary_formats(compat_version, arch)
+        for binary_format in binary_formats:
+            yield "macosx_{major}_{minor}_{binary_format}".format(
+                major=compat_version[0],
+                minor=compat_version[1],
+                binary_format=binary_format,
+            )
+
+
+# From PEP 513.
+def _is_manylinux_compatible(name, glibc_version):
+    # type: (str, GlibcVersion) -> bool
+    # Check for presence of _manylinux module.
+    try:
+        import _manylinux  # noqa
+
+        return bool(getattr(_manylinux, name + "_compatible"))
+    except (ImportError, AttributeError):
+        # Fall through to heuristic check below.
+        pass
+
+    return _have_compatible_glibc(*glibc_version)
+
+
+def _glibc_version_string():
+    # type: () -> Optional[str]
+    # Returns glibc version string, or None if not using glibc.
+    return _glibc_version_string_confstr() or _glibc_version_string_ctypes()
+
+
+def _glibc_version_string_confstr():
+    # type: () -> Optional[str]
+    """
+    Primary implementation of glibc_version_string using os.confstr.
+    """
+    # os.confstr is quite a bit faster than ctypes.DLL. It's also less likely
+    # to be broken or missing. This strategy is used in the standard library
+    # platform module.
+    # https://github.com/python/cpython/blob/fcf1d003bf4f0100c9d0921ff3d70e1127ca1b71/Lib/platform.py#L175-L183
+    try:
+        # os.confstr("CS_GNU_LIBC_VERSION") returns a string like "glibc 2.17".
+        version_string = os.confstr(  # type: ignore[attr-defined] # noqa: F821
+            "CS_GNU_LIBC_VERSION"
+        )
+        assert version_string is not None
+        _, version = version_string.split()  # type: Tuple[str, str]
+    except (AssertionError, AttributeError, OSError, ValueError):
+        # os.confstr() or CS_GNU_LIBC_VERSION not available (or a bad value)...
+        return None
+    return version
+
+
+def _glibc_version_string_ctypes():
+    # type: () -> Optional[str]
+    """
+    Fallback implementation of glibc_version_string using ctypes.
+    """
+    try:
+        import ctypes
+    except ImportError:
+        return None
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    #
+    # Note: typeshed is wrong here so we are ignoring this line.
+    process_namespace = ctypes.CDLL(None)  # type: ignore
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str = gnu_get_libc_version()  # type: str
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+# Separated out from have_compatible_glibc for easier unit testing.
+def _check_glibc_version(version_str, required_major, minimum_minor):
+    # type: (str, int, int) -> bool
+    # Parse string and check against requested version.
+    #
+    # We use a regexp instead of str.split because we want to discard any
+    # random junk that might come after the minor version -- this might happen
+    # in patched/forked versions of glibc (e.g. Linaro's version of glibc
+    # uses version strings like "2.20-2014.11"). See gh-3588.
+    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
+    if not m:
+        warnings.warn(
+            "Expected glibc version with 2 components major.minor,"
+            " got: %s" % version_str,
+            RuntimeWarning,
+        )
+        return False
+    return (
+        int(m.group("major")) == required_major
+        and int(m.group("minor")) >= minimum_minor
+    )
+
+
+def _have_compatible_glibc(required_major, minimum_minor):
+    # type: (int, int) -> bool
+    version_str = _glibc_version_string()
+    if version_str is None:
+        return False
+    return _check_glibc_version(version_str, required_major, minimum_minor)
+
+
+# Python does not provide platform information at sufficient granularity to
+# identify the architecture of the running executable in some cases, so we
+# determine it dynamically by reading the information from the running
+# process. This only applies on Linux, which uses the ELF format.
+class _ELFFileHeader(object):
+    # https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
+    class _InvalidELFFileHeader(ValueError):
+        """
+        An invalid ELF file header was found.
+        """
+
+    ELF_MAGIC_NUMBER = 0x7F454C46
+    ELFCLASS32 = 1
+    ELFCLASS64 = 2
+    ELFDATA2LSB = 1
+    ELFDATA2MSB = 2
+    EM_386 = 3
+    EM_S390 = 22
+    EM_ARM = 40
+    EM_X86_64 = 62
+    EF_ARM_ABIMASK = 0xFF000000
+    EF_ARM_ABI_VER5 = 0x05000000
+    EF_ARM_ABI_FLOAT_HARD = 0x00000400
+
+    def __init__(self, file):
+        # type: (IO[bytes]) -> None
+        def unpack(fmt):
+            # type: (str) -> int
+            try:
+                (result,) = struct.unpack(
+                    fmt, file.read(struct.calcsize(fmt))
+                )  # type: (int, )
+            except struct.error:
+                raise _ELFFileHeader._InvalidELFFileHeader()
+            return result
+
+        self.e_ident_magic = unpack(">I")
+        if self.e_ident_magic != self.ELF_MAGIC_NUMBER:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_class = unpack("B")
+        if self.e_ident_class not in {self.ELFCLASS32, self.ELFCLASS64}:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_data = unpack("B")
+        if self.e_ident_data not in {self.ELFDATA2LSB, self.ELFDATA2MSB}:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_version = unpack("B")
+        self.e_ident_osabi = unpack("B")
+        self.e_ident_abiversion = unpack("B")
+        self.e_ident_pad = file.read(7)
+        format_h = "<H" if self.e_ident_data == self.ELFDATA2LSB else ">H"
+        format_i = "<I" if self.e_ident_data == self.ELFDATA2LSB else ">I"
+        format_q = "<Q" if self.e_ident_data == self.ELFDATA2LSB else ">Q"
+        format_p = format_i if self.e_ident_class == self.ELFCLASS32 else format_q
+        self.e_type = unpack(format_h)
+        self.e_machine = unpack(format_h)
+        self.e_version = unpack(format_i)
+        self.e_entry = unpack(format_p)
+        self.e_phoff = unpack(format_p)
+        self.e_shoff = unpack(format_p)
+        self.e_flags = unpack(format_i)
+        self.e_ehsize = unpack(format_h)
+        self.e_phentsize = unpack(format_h)
+        self.e_phnum = unpack(format_h)
+        self.e_shentsize = unpack(format_h)
+        self.e_shnum = unpack(format_h)
+        self.e_shstrndx = unpack(format_h)
+
+
+def _get_elf_header():
+    # type: () -> Optional[_ELFFileHeader]
+    try:
+        with open(sys.executable, "rb") as f:
+            elf_header = _ELFFileHeader(f)
+    except (IOError, OSError, TypeError, _ELFFileHeader._InvalidELFFileHeader):
+        return None
+    return elf_header
+
+
+def _is_linux_armhf():
+    # type: () -> bool
+    # hard-float ABI can be detected from the ELF header of the running
+    # process
+    # https://static.docs.arm.com/ihi0044/g/aaelf32.pdf
+    elf_header = _get_elf_header()
+    if elf_header is None:
+        return False
+    result = elf_header.e_ident_class == elf_header.ELFCLASS32
+    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
+    result &= elf_header.e_machine == elf_header.EM_ARM
+    result &= (
+        elf_header.e_flags & elf_header.EF_ARM_ABIMASK
+    ) == elf_header.EF_ARM_ABI_VER5
+    result &= (
+        elf_header.e_flags & elf_header.EF_ARM_ABI_FLOAT_HARD
+    ) == elf_header.EF_ARM_ABI_FLOAT_HARD
+    return result
+
+
+def _is_linux_i686():
+    # type: () -> bool
+    elf_header = _get_elf_header()
+    if elf_header is None:
+        return False
+    result = elf_header.e_ident_class == elf_header.ELFCLASS32
+    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
+    result &= elf_header.e_machine == elf_header.EM_386
+    return result
+
+
+def _have_compatible_manylinux_abi(arch):
+    # type: (str) -> bool
+    if arch == "armv7l":
+        return _is_linux_armhf()
+    if arch == "i686":
+        return _is_linux_i686()
+    return True
+
+
+def _linux_platforms(is_32bit=_32_BIT_INTERPRETER):
+    # type: (bool) -> Iterator[str]
+    linux = _normalize_string(distutils.util.get_platform())
+    if is_32bit:
+        if linux == "linux_x86_64":
+            linux = "linux_i686"
+        elif linux == "linux_aarch64":
+            linux = "linux_armv7l"
+    manylinux_support = []
+    _, arch = linux.split("_", 1)
+    if _have_compatible_manylinux_abi(arch):
+        if arch in {"x86_64", "i686", "aarch64", "armv7l", "ppc64", "ppc64le", "s390x"}:
+            manylinux_support.append(
+                ("manylinux2014", (2, 17))
+            )  # CentOS 7 w/ glibc 2.17 (PEP 599)
+        if arch in {"x86_64", "i686"}:
+            manylinux_support.append(
+                ("manylinux2010", (2, 12))
+            )  # CentOS 6 w/ glibc 2.12 (PEP 571)
+            manylinux_support.append(
+                ("manylinux1", (2, 5))
+            )  # CentOS 5 w/ glibc 2.5 (PEP 513)
+    manylinux_support_iter = iter(manylinux_support)
+    for name, glibc_version in manylinux_support_iter:
+        if _is_manylinux_compatible(name, glibc_version):
+            yield linux.replace("linux", name)
+            break
+    # Support for a later manylinux implies support for an earlier version.
+    for name, _ in manylinux_support_iter:
+        yield linux.replace("linux", name)
+    yield linux
+
+
+def _generic_platforms():
+    # type: () -> Iterator[str]
+    yield _normalize_string(distutils.util.get_platform())
+
+
+def _platform_tags():
+    # type: () -> Iterator[str]
+    """
+    Provides the platform tags for this installation.
+    """
+    if platform.system() == "Darwin":
+        return mac_platforms()
+    elif platform.system() == "Linux":
+        return _linux_platforms()
+    else:
+        return _generic_platforms()
+
+
+def interpreter_name():
+    # type: () -> str
+    """
+    Returns the name of the running interpreter.
+    """
+    try:
+        name = sys.implementation.name  # type: ignore
+    except AttributeError:  # pragma: no cover
+        # Python 2.7 compatibility.
+        name = platform.python_implementation().lower()
+    return INTERPRETER_SHORT_NAMES.get(name) or name
+
+
+def interpreter_version(**kwargs):
+    # type: (bool) -> str
+    """
+    Returns the version of the running interpreter.
+    """
+    warn = _warn_keyword_parameter("interpreter_version", kwargs)
+    version = _get_config_var("py_version_nodot", warn=warn)
+    if version:
+        version = str(version)
+    else:
+        version = _version_nodot(sys.version_info[:2])
+    return version
+
+
+def _version_nodot(version):
+    # type: (PythonVersion) -> str
+    if any(v >= 10 for v in version):
+        sep = "_"
+    else:
+        sep = ""
+    return sep.join(map(str, version))
+
+
+def sys_tags(**kwargs):
+    # type: (bool) -> Iterator[Tag]
+    """
+    Returns the sequence of tag triples for the running interpreter.
+
+    The order of the sequence corresponds to priority order for the
+    interpreter, from most to least important.
+    """
+    warn = _warn_keyword_parameter("sys_tags", kwargs)
+
+    interp_name = interpreter_name()
+    if interp_name == "cp":
+        for tag in cpython_tags(warn=warn):
+            yield tag
+    else:
+        for tag in generic_tags():
+            yield tag
+
+    for tag in compatible_tags():
+        yield tag
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/utils.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/utils.py
new file mode 100644
index 0000000..19579c1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/utils.py
@@ -0,0 +1,65 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import re
+
+from ._typing import TYPE_CHECKING, cast
+from .version import InvalidVersion, Version
+
+if TYPE_CHECKING:  # pragma: no cover
+    from typing import NewType, Union
+
+    NormalizedName = NewType("NormalizedName", str)
+
+_canonicalize_regex = re.compile(r"[-_.]+")
+
+
+def canonicalize_name(name):
+    # type: (str) -> NormalizedName
+    # This is taken from PEP 503.
+    value = _canonicalize_regex.sub("-", name).lower()
+    return cast("NormalizedName", value)
+
+
+def canonicalize_version(_version):
+    # type: (str) -> Union[Version, str]
+    """
+    This is very similar to Version.__str__, but has one subtle difference
+    with the way it handles the release segment.
+    """
+
+    try:
+        version = Version(_version)
+    except InvalidVersion:
+        # Legacy versions cannot be normalized
+        return _version
+
+    parts = []
+
+    # Epoch
+    if version.epoch != 0:
+        parts.append("{0}!".format(version.epoch))
+
+    # Release segment
+    # NB: This strips trailing '.0's to normalize
+    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))
+
+    # Pre-release
+    if version.pre is not None:
+        parts.append("".join(str(x) for x in version.pre))
+
+    # Post-release
+    if version.post is not None:
+        parts.append(".post{0}".format(version.post))
+
+    # Development release
+    if version.dev is not None:
+        parts.append(".dev{0}".format(version.dev))
+
+    # Local version segment
+    if version.local is not None:
+        parts.append("+{0}".format(version.local))
+
+    return "".join(parts)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/version.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/version.py
new file mode 100644
index 0000000..00371e8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/packaging/version.py
@@ -0,0 +1,535 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import collections
+import itertools
+import re
+
+from ._structures import Infinity, NegativeInfinity
+from ._typing import TYPE_CHECKING
+
+if TYPE_CHECKING:  # pragma: no cover
+    from typing import Callable, Iterator, List, Optional, SupportsInt, Tuple, Union
+
+    from ._structures import InfinityType, NegativeInfinityType
+
+    InfiniteTypes = Union[InfinityType, NegativeInfinityType]
+    PrePostDevType = Union[InfiniteTypes, Tuple[str, int]]
+    SubLocalType = Union[InfiniteTypes, int, str]
+    LocalType = Union[
+        NegativeInfinityType,
+        Tuple[
+            Union[
+                SubLocalType,
+                Tuple[SubLocalType, str],
+                Tuple[NegativeInfinityType, SubLocalType],
+            ],
+            ...,
+        ],
+    ]
+    CmpKey = Tuple[
+        int, Tuple[int, ...], PrePostDevType, PrePostDevType, PrePostDevType, LocalType
+    ]
+    LegacyCmpKey = Tuple[int, Tuple[str, ...]]
+    VersionComparisonMethod = Callable[
+        [Union[CmpKey, LegacyCmpKey], Union[CmpKey, LegacyCmpKey]], bool
+    ]
+
+__all__ = ["parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"]
+
+
+_Version = collections.namedtuple(
+    "_Version", ["epoch", "release", "dev", "pre", "post", "local"]
+)
+
+
+def parse(version):
+    # type: (str) -> Union[LegacyVersion, Version]
+    """
+    Parse the given version string and return either a :class:`Version` object
+    or a :class:`LegacyVersion` object depending on if the given version is
+    a valid PEP 440 version or a legacy version.
+    """
+    try:
+        return Version(version)
+    except InvalidVersion:
+        return LegacyVersion(version)
+
+
+class InvalidVersion(ValueError):
+    """
+    An invalid version was found, users should refer to PEP 440.
+    """
+
+
+class _BaseVersion(object):
+    _key = None  # type: Union[CmpKey, LegacyCmpKey]
+
+    def __hash__(self):
+        # type: () -> int
+        return hash(self._key)
+
+    def __lt__(self, other):
+        # type: (_BaseVersion) -> bool
+        return self._compare(other, lambda s, o: s < o)
+
+    def __le__(self, other):
+        # type: (_BaseVersion) -> bool
+        return self._compare(other, lambda s, o: s <= o)
+
+    def __eq__(self, other):
+        # type: (object) -> bool
+        return self._compare(other, lambda s, o: s == o)
+
+    def __ge__(self, other):
+        # type: (_BaseVersion) -> bool
+        return self._compare(other, lambda s, o: s >= o)
+
+    def __gt__(self, other):
+        # type: (_BaseVersion) -> bool
+        return self._compare(other, lambda s, o: s > o)
+
+    def __ne__(self, other):
+        # type: (object) -> bool
+        return self._compare(other, lambda s, o: s != o)
+
+    def _compare(self, other, method):
+        # type: (object, VersionComparisonMethod) -> Union[bool, NotImplemented]
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return method(self._key, other._key)
+
+
+class LegacyVersion(_BaseVersion):
+    def __init__(self, version):
+        # type: (str) -> None
+        self._version = str(version)
+        self._key = _legacy_cmpkey(self._version)
+
+    def __str__(self):
+        # type: () -> str
+        return self._version
+
+    def __repr__(self):
+        # type: () -> str
+        return "<LegacyVersion({0})>".format(repr(str(self)))
+
+    @property
+    def public(self):
+        # type: () -> str
+        return self._version
+
+    @property
+    def base_version(self):
+        # type: () -> str
+        return self._version
+
+    @property
+    def epoch(self):
+        # type: () -> int
+        return -1
+
+    @property
+    def release(self):
+        # type: () -> None
+        return None
+
+    @property
+    def pre(self):
+        # type: () -> None
+        return None
+
+    @property
+    def post(self):
+        # type: () -> None
+        return None
+
+    @property
+    def dev(self):
+        # type: () -> None
+        return None
+
+    @property
+    def local(self):
+        # type: () -> None
+        return None
+
+    @property
+    def is_prerelease(self):
+        # type: () -> bool
+        return False
+
+    @property
+    def is_postrelease(self):
+        # type: () -> bool
+        return False
+
+    @property
+    def is_devrelease(self):
+        # type: () -> bool
+        return False
+
+
+_legacy_version_component_re = re.compile(r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE)
+
+_legacy_version_replacement_map = {
+    "pre": "c",
+    "preview": "c",
+    "-": "final-",
+    "rc": "c",
+    "dev": "@",
+}
+
+
+def _parse_version_parts(s):
+    # type: (str) -> Iterator[str]
+    for part in _legacy_version_component_re.split(s):
+        part = _legacy_version_replacement_map.get(part, part)
+
+        if not part or part == ".":
+            continue
+
+        if part[:1] in "0123456789":
+            # pad for numeric comparison
+            yield part.zfill(8)
+        else:
+            yield "*" + part
+
+    # ensure that alpha/beta/candidate are before final
+    yield "*final"
+
+
+def _legacy_cmpkey(version):
+    # type: (str) -> LegacyCmpKey
+
+    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
+    # greater than or equal to 0. This will effectively put the LegacyVersion,
+    # which uses the defacto standard originally implemented by setuptools,
+    # as before all PEP 440 versions.
+    epoch = -1
+
+    # This scheme is taken from pkg_resources.parse_version setuptools prior to
+    # it's adoption of the packaging library.
+    parts = []  # type: List[str]
+    for part in _parse_version_parts(version.lower()):
+        if part.startswith("*"):
+            # remove "-" before a prerelease tag
+            if part < "*final":
+                while parts and parts[-1] == "*final-":
+                    parts.pop()
+
+            # remove trailing zeros from each series of numeric parts
+            while parts and parts[-1] == "00000000":
+                parts.pop()
+
+        parts.append(part)
+
+    return epoch, tuple(parts)
+
+
+# Deliberately not anchored to the start and end of the string, to make it
+# easier for 3rd party code to reuse
+VERSION_PATTERN = r"""
+    v?
+    (?:
+        (?:(?P<epoch>[0-9]+)!)?                           # epoch
+        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
+        (?P<pre>                                          # pre-release
+            [-_\.]?
+            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
+            [-_\.]?
+            (?P<pre_n>[0-9]+)?
+        )?
+        (?P<post>                                         # post release
+            (?:-(?P<post_n1>[0-9]+))
+            |
+            (?:
+                [-_\.]?
+                (?P<post_l>post|rev|r)
+                [-_\.]?
+                (?P<post_n2>[0-9]+)?
+            )
+        )?
+        (?P<dev>                                          # dev release
+            [-_\.]?
+            (?P<dev_l>dev)
+            [-_\.]?
+            (?P<dev_n>[0-9]+)?
+        )?
+    )
+    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
+"""
+
+
+class Version(_BaseVersion):
+
+    _regex = re.compile(r"^\s*" + VERSION_PATTERN + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    def __init__(self, version):
+        # type: (str) -> None
+
+        # Validate the version and parse it into pieces
+        match = self._regex.search(version)
+        if not match:
+            raise InvalidVersion("Invalid version: '{0}'".format(version))
+
+        # Store the parsed out pieces of the version
+        self._version = _Version(
+            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
+            release=tuple(int(i) for i in match.group("release").split(".")),
+            pre=_parse_letter_version(match.group("pre_l"), match.group("pre_n")),
+            post=_parse_letter_version(
+                match.group("post_l"), match.group("post_n1") or match.group("post_n2")
+            ),
+            dev=_parse_letter_version(match.group("dev_l"), match.group("dev_n")),
+            local=_parse_local_version(match.group("local")),
+        )
+
+        # Generate a key which will be used for sorting
+        self._key = _cmpkey(
+            self._version.epoch,
+            self._version.release,
+            self._version.pre,
+            self._version.post,
+            self._version.dev,
+            self._version.local,
+        )
+
+    def __repr__(self):
+        # type: () -> str
+        return "<Version({0})>".format(repr(str(self)))
+
+    def __str__(self):
+        # type: () -> str
+        parts = []
+
+        # Epoch
+        if self.epoch != 0:
+            parts.append("{0}!".format(self.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self.release))
+
+        # Pre-release
+        if self.pre is not None:
+            parts.append("".join(str(x) for x in self.pre))
+
+        # Post-release
+        if self.post is not None:
+            parts.append(".post{0}".format(self.post))
+
+        # Development release
+        if self.dev is not None:
+            parts.append(".dev{0}".format(self.dev))
+
+        # Local version segment
+        if self.local is not None:
+            parts.append("+{0}".format(self.local))
+
+        return "".join(parts)
+
+    @property
+    def epoch(self):
+        # type: () -> int
+        _epoch = self._version.epoch  # type: int
+        return _epoch
+
+    @property
+    def release(self):
+        # type: () -> Tuple[int, ...]
+        _release = self._version.release  # type: Tuple[int, ...]
+        return _release
+
+    @property
+    def pre(self):
+        # type: () -> Optional[Tuple[str, int]]
+        _pre = self._version.pre  # type: Optional[Tuple[str, int]]
+        return _pre
+
+    @property
+    def post(self):
+        # type: () -> Optional[Tuple[str, int]]
+        return self._version.post[1] if self._version.post else None
+
+    @property
+    def dev(self):
+        # type: () -> Optional[Tuple[str, int]]
+        return self._version.dev[1] if self._version.dev else None
+
+    @property
+    def local(self):
+        # type: () -> Optional[str]
+        if self._version.local:
+            return ".".join(str(x) for x in self._version.local)
+        else:
+            return None
+
+    @property
+    def public(self):
+        # type: () -> str
+        return str(self).split("+", 1)[0]
+
+    @property
+    def base_version(self):
+        # type: () -> str
+        parts = []
+
+        # Epoch
+        if self.epoch != 0:
+            parts.append("{0}!".format(self.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self.release))
+
+        return "".join(parts)
+
+    @property
+    def is_prerelease(self):
+        # type: () -> bool
+        return self.dev is not None or self.pre is not None
+
+    @property
+    def is_postrelease(self):
+        # type: () -> bool
+        return self.post is not None
+
+    @property
+    def is_devrelease(self):
+        # type: () -> bool
+        return self.dev is not None
+
+    @property
+    def major(self):
+        # type: () -> int
+        return self.release[0] if len(self.release) >= 1 else 0
+
+    @property
+    def minor(self):
+        # type: () -> int
+        return self.release[1] if len(self.release) >= 2 else 0
+
+    @property
+    def micro(self):
+        # type: () -> int
+        return self.release[2] if len(self.release) >= 3 else 0
+
+
+def _parse_letter_version(
+    letter,  # type: str
+    number,  # type: Union[str, bytes, SupportsInt]
+):
+    # type: (...) -> Optional[Tuple[str, int]]
+
+    if letter:
+        # We consider there to be an implicit 0 in a pre-release if there is
+        # not a numeral associated with it.
+        if number is None:
+            number = 0
+
+        # We normalize any letters to their lower case form
+        letter = letter.lower()
+
+        # We consider some words to be alternate spellings of other words and
+        # in those cases we want to normalize the spellings to our preferred
+        # spelling.
+        if letter == "alpha":
+            letter = "a"
+        elif letter == "beta":
+            letter = "b"
+        elif letter in ["c", "pre", "preview"]:
+            letter = "rc"
+        elif letter in ["rev", "r"]:
+            letter = "post"
+
+        return letter, int(number)
+    if not letter and number:
+        # We assume if we are given a number, but we are not given a letter
+        # then this is using the implicit post release syntax (e.g. 1.0-1)
+        letter = "post"
+
+        return letter, int(number)
+
+    return None
+
+
+_local_version_separators = re.compile(r"[\._-]")
+
+
+def _parse_local_version(local):
+    # type: (str) -> Optional[LocalType]
+    """
+    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
+    """
+    if local is not None:
+        return tuple(
+            part.lower() if not part.isdigit() else int(part)
+            for part in _local_version_separators.split(local)
+        )
+    return None
+
+
+def _cmpkey(
+    epoch,  # type: int
+    release,  # type: Tuple[int, ...]
+    pre,  # type: Optional[Tuple[str, int]]
+    post,  # type: Optional[Tuple[str, int]]
+    dev,  # type: Optional[Tuple[str, int]]
+    local,  # type: Optional[Tuple[SubLocalType]]
+):
+    # type: (...) -> CmpKey
+
+    # When we compare a release version, we want to compare it with all of the
+    # trailing zeros removed. So we'll use a reverse the list, drop all the now
+    # leading zeros until we come to something non zero, then take the rest
+    # re-reverse it back into the correct order and make it a tuple and use
+    # that for our sorting key.
+    _release = tuple(
+        reversed(list(itertools.dropwhile(lambda x: x == 0, reversed(release))))
+    )
+
+    # We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
+    # We'll do this by abusing the pre segment, but we _only_ want to do this
+    # if there is not a pre or a post segment. If we have one of those then
+    # the normal sorting rules will handle this case correctly.
+    if pre is None and post is None and dev is not None:
+        _pre = NegativeInfinity  # type: PrePostDevType
+    # Versions without a pre-release (except as noted above) should sort after
+    # those with one.
+    elif pre is None:
+        _pre = Infinity
+    else:
+        _pre = pre
+
+    # Versions without a post segment should sort before those with one.
+    if post is None:
+        _post = NegativeInfinity  # type: PrePostDevType
+
+    else:
+        _post = post
+
+    # Versions without a development segment should sort after those with one.
+    if dev is None:
+        _dev = Infinity  # type: PrePostDevType
+
+    else:
+        _dev = dev
+
+    if local is None:
+        # Versions without a local segment should sort before those with one.
+        _local = NegativeInfinity  # type: LocalType
+    else:
+        # Versions with a local segment need that segment parsed to implement
+        # the sorting rules in PEP440.
+        # - Alpha numeric segments sort before numeric segments
+        # - Alpha numeric segments sort lexicographically
+        # - Numeric segments sort numerically
+        # - Shorter versions sort before longer versions when the prefixes
+        #   match exactly
+        _local = tuple(
+            (i, "") if isinstance(i, int) else (NegativeInfinity, i) for i in local
+        )
+
+    return epoch, _release, _pre, _post, _dev, _local
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/__init__.py
new file mode 100644
index 0000000..7355b68
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/__init__.py
@@ -0,0 +1,4 @@
+"""Wrappers to build Python packages using PEP 517 hooks
+"""
+
+__version__ = '0.8.2'
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..b1c0131
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/_in_process.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/_in_process.py
new file mode 100644
index 0000000..a536b03
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/_in_process.py
@@ -0,0 +1,280 @@
+"""This is invoked in a subprocess to call the build backend hooks.
+
+It expects:
+- Command line args: hook_name, control_dir
+- Environment variables:
+      PEP517_BUILD_BACKEND=entry.point:spec
+      PEP517_BACKEND_PATH=paths (separated with os.pathsep)
+- control_dir/input.json:
+  - {"kwargs": {...}}
+
+Results:
+- control_dir/output.json
+  - {"return_val": ...}
+"""
+from glob import glob
+from importlib import import_module
+import json
+import os
+import os.path
+from os.path import join as pjoin
+import re
+import shutil
+import sys
+import traceback
+
+# This file is run as a script, and `import compat` is not zip-safe, so we
+# include write_json() and read_json() from compat.py.
+#
+# Handle reading and writing JSON in UTF-8, on Python 3 and 2.
+
+if sys.version_info[0] >= 3:
+    # Python 3
+    def write_json(obj, path, **kwargs):
+        with open(path, 'w', encoding='utf-8') as f:
+            json.dump(obj, f, **kwargs)
+
+    def read_json(path):
+        with open(path, 'r', encoding='utf-8') as f:
+            return json.load(f)
+
+else:
+    # Python 2
+    def write_json(obj, path, **kwargs):
+        with open(path, 'wb') as f:
+            json.dump(obj, f, encoding='utf-8', **kwargs)
+
+    def read_json(path):
+        with open(path, 'rb') as f:
+            return json.load(f)
+
+
+class BackendUnavailable(Exception):
+    """Raised if we cannot import the backend"""
+    def __init__(self, traceback):
+        self.traceback = traceback
+
+
+class BackendInvalid(Exception):
+    """Raised if the backend is invalid"""
+    def __init__(self, message):
+        self.message = message
+
+
+class HookMissing(Exception):
+    """Raised if a hook is missing and we are not executing the fallback"""
+
+
+def contained_in(filename, directory):
+    """Test if a file is located within the given directory."""
+    filename = os.path.normcase(os.path.abspath(filename))
+    directory = os.path.normcase(os.path.abspath(directory))
+    return os.path.commonprefix([filename, directory]) == directory
+
+
+def _build_backend():
+    """Find and load the build backend"""
+    # Add in-tree backend directories to the front of sys.path.
+    backend_path = os.environ.get('PEP517_BACKEND_PATH')
+    if backend_path:
+        extra_pathitems = backend_path.split(os.pathsep)
+        sys.path[:0] = extra_pathitems
+
+    ep = os.environ['PEP517_BUILD_BACKEND']
+    mod_path, _, obj_path = ep.partition(':')
+    try:
+        obj = import_module(mod_path)
+    except ImportError:
+        raise BackendUnavailable(traceback.format_exc())
+
+    if backend_path:
+        if not any(
+            contained_in(obj.__file__, path)
+            for path in extra_pathitems
+        ):
+            raise BackendInvalid("Backend was not loaded from backend-path")
+
+    if obj_path:
+        for path_part in obj_path.split('.'):
+            obj = getattr(obj, path_part)
+    return obj
+
+
+def get_requires_for_build_wheel(config_settings):
+    """Invoke the optional get_requires_for_build_wheel hook
+
+    Returns [] if the hook is not defined.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.get_requires_for_build_wheel
+    except AttributeError:
+        return []
+    else:
+        return hook(config_settings)
+
+
+def prepare_metadata_for_build_wheel(
+        metadata_directory, config_settings, _allow_fallback):
+    """Invoke optional prepare_metadata_for_build_wheel
+
+    Implements a fallback by building a wheel if the hook isn't defined,
+    unless _allow_fallback is False in which case HookMissing is raised.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.prepare_metadata_for_build_wheel
+    except AttributeError:
+        if not _allow_fallback:
+            raise HookMissing()
+        return _get_wheel_metadata_from_wheel(backend, metadata_directory,
+                                              config_settings)
+    else:
+        return hook(metadata_directory, config_settings)
+
+
+WHEEL_BUILT_MARKER = 'PEP517_ALREADY_BUILT_WHEEL'
+
+
+def _dist_info_files(whl_zip):
+    """Identify the .dist-info folder inside a wheel ZipFile."""
+    res = []
+    for path in whl_zip.namelist():
+        m = re.match(r'[^/\\]+-[^/\\]+\.dist-info/', path)
+        if m:
+            res.append(path)
+    if res:
+        return res
+    raise Exception("No .dist-info folder found in wheel")
+
+
+def _get_wheel_metadata_from_wheel(
+        backend, metadata_directory, config_settings):
+    """Build a wheel and extract the metadata from it.
+
+    Fallback for when the build backend does not
+    define the 'get_wheel_metadata' hook.
+    """
+    from zipfile import ZipFile
+    whl_basename = backend.build_wheel(metadata_directory, config_settings)
+    with open(os.path.join(metadata_directory, WHEEL_BUILT_MARKER), 'wb'):
+        pass  # Touch marker file
+
+    whl_file = os.path.join(metadata_directory, whl_basename)
+    with ZipFile(whl_file) as zipf:
+        dist_info = _dist_info_files(zipf)
+        zipf.extractall(path=metadata_directory, members=dist_info)
+    return dist_info[0].split('/')[0]
+
+
+def _find_already_built_wheel(metadata_directory):
+    """Check for a wheel already built during the get_wheel_metadata hook.
+    """
+    if not metadata_directory:
+        return None
+    metadata_parent = os.path.dirname(metadata_directory)
+    if not os.path.isfile(pjoin(metadata_parent, WHEEL_BUILT_MARKER)):
+        return None
+
+    whl_files = glob(os.path.join(metadata_parent, '*.whl'))
+    if not whl_files:
+        print('Found wheel built marker, but no .whl files')
+        return None
+    if len(whl_files) > 1:
+        print('Found multiple .whl files; unspecified behaviour. '
+              'Will call build_wheel.')
+        return None
+
+    # Exactly one .whl file
+    return whl_files[0]
+
+
+def build_wheel(wheel_directory, config_settings, metadata_directory=None):
+    """Invoke the mandatory build_wheel hook.
+
+    If a wheel was already built in the
+    prepare_metadata_for_build_wheel fallback, this
+    will copy it rather than rebuilding the wheel.
+    """
+    prebuilt_whl = _find_already_built_wheel(metadata_directory)
+    if prebuilt_whl:
+        shutil.copy2(prebuilt_whl, wheel_directory)
+        return os.path.basename(prebuilt_whl)
+
+    return _build_backend().build_wheel(wheel_directory, config_settings,
+                                        metadata_directory)
+
+
+def get_requires_for_build_sdist(config_settings):
+    """Invoke the optional get_requires_for_build_wheel hook
+
+    Returns [] if the hook is not defined.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.get_requires_for_build_sdist
+    except AttributeError:
+        return []
+    else:
+        return hook(config_settings)
+
+
+class _DummyException(Exception):
+    """Nothing should ever raise this exception"""
+
+
+class GotUnsupportedOperation(Exception):
+    """For internal use when backend raises UnsupportedOperation"""
+    def __init__(self, traceback):
+        self.traceback = traceback
+
+
+def build_sdist(sdist_directory, config_settings):
+    """Invoke the mandatory build_sdist hook."""
+    backend = _build_backend()
+    try:
+        return backend.build_sdist(sdist_directory, config_settings)
+    except getattr(backend, 'UnsupportedOperation', _DummyException):
+        raise GotUnsupportedOperation(traceback.format_exc())
+
+
+HOOK_NAMES = {
+    'get_requires_for_build_wheel',
+    'prepare_metadata_for_build_wheel',
+    'build_wheel',
+    'get_requires_for_build_sdist',
+    'build_sdist',
+}
+
+
+def main():
+    if len(sys.argv) < 3:
+        sys.exit("Needs args: hook_name, control_dir")
+    hook_name = sys.argv[1]
+    control_dir = sys.argv[2]
+    if hook_name not in HOOK_NAMES:
+        sys.exit("Unknown hook: %s" % hook_name)
+    hook = globals()[hook_name]
+
+    hook_input = read_json(pjoin(control_dir, 'input.json'))
+
+    json_out = {'unsupported': False, 'return_val': None}
+    try:
+        json_out['return_val'] = hook(**hook_input['kwargs'])
+    except BackendUnavailable as e:
+        json_out['no_backend'] = True
+        json_out['traceback'] = e.traceback
+    except BackendInvalid as e:
+        json_out['backend_invalid'] = True
+        json_out['backend_error'] = e.message
+    except GotUnsupportedOperation as e:
+        json_out['unsupported'] = True
+        json_out['traceback'] = e.traceback
+    except HookMissing:
+        json_out['hook_missing'] = True
+
+    write_json(json_out, pjoin(control_dir, 'output.json'), indent=2)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/build.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/build.py
new file mode 100644
index 0000000..2643014
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/build.py
@@ -0,0 +1,124 @@
+"""Build a project using PEP 517 hooks.
+"""
+import argparse
+import logging
+import os
+from pip._vendor import toml
+import shutil
+
+from .envbuild import BuildEnvironment
+from .wrappers import Pep517HookCaller
+from .dirtools import tempdir, mkdir_p
+from .compat import FileNotFoundError
+
+log = logging.getLogger(__name__)
+
+
+def validate_system(system):
+    """
+    Ensure build system has the requisite fields.
+    """
+    required = {'requires', 'build-backend'}
+    if not (required <= set(system)):
+        message = "Missing required fields: {missing}".format(
+            missing=required-set(system),
+        )
+        raise ValueError(message)
+
+
+def load_system(source_dir):
+    """
+    Load the build system from a source dir (pyproject.toml).
+    """
+    pyproject = os.path.join(source_dir, 'pyproject.toml')
+    with open(pyproject) as f:
+        pyproject_data = toml.load(f)
+    return pyproject_data['build-system']
+
+
+def compat_system(source_dir):
+    """
+    Given a source dir, attempt to get a build system backend
+    and requirements from pyproject.toml. Fallback to
+    setuptools but only if the file was not found or a build
+    system was not indicated.
+    """
+    try:
+        system = load_system(source_dir)
+    except (FileNotFoundError, KeyError):
+        system = {}
+    system.setdefault(
+        'build-backend',
+        'setuptools.build_meta:__legacy__',
+    )
+    system.setdefault('requires', ['setuptools', 'wheel'])
+    return system
+
+
+def _do_build(hooks, env, dist, dest):
+    get_requires_name = 'get_requires_for_build_{dist}'.format(**locals())
+    get_requires = getattr(hooks, get_requires_name)
+    reqs = get_requires({})
+    log.info('Got build requires: %s', reqs)
+
+    env.pip_install(reqs)
+    log.info('Installed dynamic build dependencies')
+
+    with tempdir() as td:
+        log.info('Trying to build %s in %s', dist, td)
+        build_name = 'build_{dist}'.format(**locals())
+        build = getattr(hooks, build_name)
+        filename = build(td, {})
+        source = os.path.join(td, filename)
+        shutil.move(source, os.path.join(dest, os.path.basename(filename)))
+
+
+def build(source_dir, dist, dest=None, system=None):
+    system = system or load_system(source_dir)
+    dest = os.path.join(source_dir, dest or 'dist')
+    mkdir_p(dest)
+
+    validate_system(system)
+    hooks = Pep517HookCaller(
+        source_dir, system['build-backend'], system.get('backend-path')
+    )
+
+    with BuildEnvironment() as env:
+        env.pip_install(system['requires'])
+        _do_build(hooks, env, dist, dest)
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument(
+    'source_dir',
+    help="A directory containing pyproject.toml",
+)
+parser.add_argument(
+    '--binary', '-b',
+    action='store_true',
+    default=False,
+)
+parser.add_argument(
+    '--source', '-s',
+    action='store_true',
+    default=False,
+)
+parser.add_argument(
+    '--out-dir', '-o',
+    help="Destination in which to save the builds relative to source dir",
+)
+
+
+def main(args):
+    # determine which dists to build
+    dists = list(filter(None, (
+        'sdist' if args.source or not args.binary else None,
+        'wheel' if args.binary or not args.source else None,
+    )))
+
+    for dist in dists:
+        build(args.source_dir, dist, args.out_dir)
+
+
+if __name__ == '__main__':
+    main(parser.parse_args())
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/check.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/check.py
new file mode 100644
index 0000000..13e722a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/check.py
@@ -0,0 +1,203 @@
+"""Check a project and backend by attempting to build using PEP 517 hooks.
+"""
+import argparse
+import logging
+import os
+from os.path import isfile, join as pjoin
+from pip._vendor.toml import TomlDecodeError, load as toml_load
+import shutil
+from subprocess import CalledProcessError
+import sys
+import tarfile
+from tempfile import mkdtemp
+import zipfile
+
+from .colorlog import enable_colourful_output
+from .envbuild import BuildEnvironment
+from .wrappers import Pep517HookCaller
+
+log = logging.getLogger(__name__)
+
+
+def check_build_sdist(hooks, build_sys_requires):
+    with BuildEnvironment() as env:
+        try:
+            env.pip_install(build_sys_requires)
+            log.info('Installed static build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install static build dependencies')
+            return False
+
+        try:
+            reqs = hooks.get_requires_for_build_sdist({})
+            log.info('Got build requires: %s', reqs)
+        except Exception:
+            log.error('Failure in get_requires_for_build_sdist', exc_info=True)
+            return False
+
+        try:
+            env.pip_install(reqs)
+            log.info('Installed dynamic build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install dynamic build dependencies')
+            return False
+
+        td = mkdtemp()
+        log.info('Trying to build sdist in %s', td)
+        try:
+            try:
+                filename = hooks.build_sdist(td, {})
+                log.info('build_sdist returned %r', filename)
+            except Exception:
+                log.info('Failure in build_sdist', exc_info=True)
+                return False
+
+            if not filename.endswith('.tar.gz'):
+                log.error(
+                    "Filename %s doesn't have .tar.gz extension", filename)
+                return False
+
+            path = pjoin(td, filename)
+            if isfile(path):
+                log.info("Output file %s exists", path)
+            else:
+                log.error("Output file %s does not exist", path)
+                return False
+
+            if tarfile.is_tarfile(path):
+                log.info("Output file is a tar file")
+            else:
+                log.error("Output file is not a tar file")
+                return False
+
+        finally:
+            shutil.rmtree(td)
+
+        return True
+
+
+def check_build_wheel(hooks, build_sys_requires):
+    with BuildEnvironment() as env:
+        try:
+            env.pip_install(build_sys_requires)
+            log.info('Installed static build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install static build dependencies')
+            return False
+
+        try:
+            reqs = hooks.get_requires_for_build_wheel({})
+            log.info('Got build requires: %s', reqs)
+        except Exception:
+            log.error('Failure in get_requires_for_build_sdist', exc_info=True)
+            return False
+
+        try:
+            env.pip_install(reqs)
+            log.info('Installed dynamic build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install dynamic build dependencies')
+            return False
+
+        td = mkdtemp()
+        log.info('Trying to build wheel in %s', td)
+        try:
+            try:
+                filename = hooks.build_wheel(td, {})
+                log.info('build_wheel returned %r', filename)
+            except Exception:
+                log.info('Failure in build_wheel', exc_info=True)
+                return False
+
+            if not filename.endswith('.whl'):
+                log.error("Filename %s doesn't have .whl extension", filename)
+                return False
+
+            path = pjoin(td, filename)
+            if isfile(path):
+                log.info("Output file %s exists", path)
+            else:
+                log.error("Output file %s does not exist", path)
+                return False
+
+            if zipfile.is_zipfile(path):
+                log.info("Output file is a zip file")
+            else:
+                log.error("Output file is not a zip file")
+                return False
+
+        finally:
+            shutil.rmtree(td)
+
+        return True
+
+
+def check(source_dir):
+    pyproject = pjoin(source_dir, 'pyproject.toml')
+    if isfile(pyproject):
+        log.info('Found pyproject.toml')
+    else:
+        log.error('Missing pyproject.toml')
+        return False
+
+    try:
+        with open(pyproject) as f:
+            pyproject_data = toml_load(f)
+        # Ensure the mandatory data can be loaded
+        buildsys = pyproject_data['build-system']
+        requires = buildsys['requires']
+        backend = buildsys['build-backend']
+        backend_path = buildsys.get('backend-path')
+        log.info('Loaded pyproject.toml')
+    except (TomlDecodeError, KeyError):
+        log.error("Invalid pyproject.toml", exc_info=True)
+        return False
+
+    hooks = Pep517HookCaller(source_dir, backend, backend_path)
+
+    sdist_ok = check_build_sdist(hooks, requires)
+    wheel_ok = check_build_wheel(hooks, requires)
+
+    if not sdist_ok:
+        log.warning('Sdist checks failed; scroll up to see')
+    if not wheel_ok:
+        log.warning('Wheel checks failed')
+
+    return sdist_ok
+
+
+def main(argv=None):
+    ap = argparse.ArgumentParser()
+    ap.add_argument(
+        'source_dir',
+        help="A directory containing pyproject.toml")
+    args = ap.parse_args(argv)
+
+    enable_colourful_output()
+
+    ok = check(args.source_dir)
+
+    if ok:
+        print(ansi('Checks passed', 'green'))
+    else:
+        print(ansi('Checks failed', 'red'))
+        sys.exit(1)
+
+
+ansi_codes = {
+    'reset': '\x1b[0m',
+    'bold': '\x1b[1m',
+    'red': '\x1b[31m',
+    'green': '\x1b[32m',
+}
+
+
+def ansi(s, attr):
+    if os.name != 'nt' and sys.stdout.isatty():
+        return ansi_codes[attr] + str(s) + ansi_codes['reset']
+    else:
+        return str(s)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/colorlog.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/colorlog.py
new file mode 100644
index 0000000..69c8a59
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/colorlog.py
@@ -0,0 +1,115 @@
+"""Nicer log formatting with colours.
+
+Code copied from Tornado, Apache licensed.
+"""
+# Copyright 2012 Facebook
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import logging
+import sys
+
+try:
+    import curses
+except ImportError:
+    curses = None
+
+
+def _stderr_supports_color():
+    color = False
+    if curses and hasattr(sys.stderr, 'isatty') and sys.stderr.isatty():
+        try:
+            curses.setupterm()
+            if curses.tigetnum("colors") > 0:
+                color = True
+        except Exception:
+            pass
+    return color
+
+
+class LogFormatter(logging.Formatter):
+    """Log formatter with colour support
+    """
+    DEFAULT_COLORS = {
+        logging.INFO: 2,  # Green
+        logging.WARNING: 3,  # Yellow
+        logging.ERROR: 1,  # Red
+        logging.CRITICAL: 1,
+    }
+
+    def __init__(self, color=True, datefmt=None):
+        r"""
+        :arg bool color: Enables color support.
+        :arg string fmt: Log message format.
+        It will be applied to the attributes dict of log records. The
+        text between ``%(color)s`` and ``%(end_color)s`` will be colored
+        depending on the level if color support is on.
+        :arg dict colors: color mappings from logging level to terminal color
+        code
+        :arg string datefmt: Datetime format.
+        Used for formatting ``(asctime)`` placeholder in ``prefix_fmt``.
+        .. versionchanged:: 3.2
+        Added ``fmt`` and ``datefmt`` arguments.
+        """
+        logging.Formatter.__init__(self, datefmt=datefmt)
+        self._colors = {}
+        if color and _stderr_supports_color():
+            # The curses module has some str/bytes confusion in
+            # python3. Until version 3.2.3, most methods return
+            # bytes, but only accept strings. In addition, we want to
+            # output these strings with the logging module, which
+            # works with unicode strings. The explicit calls to
+            # unicode() below are harmless in python2 but will do the
+            # right conversion in python 3.
+            fg_color = (curses.tigetstr("setaf") or
+                        curses.tigetstr("setf") or "")
+            if (3, 0) < sys.version_info < (3, 2, 3):
+                fg_color = str(fg_color, "ascii")
+
+            for levelno, code in self.DEFAULT_COLORS.items():
+                self._colors[levelno] = str(
+                    curses.tparm(fg_color, code), "ascii")
+            self._normal = str(curses.tigetstr("sgr0"), "ascii")
+
+            scr = curses.initscr()
+            self.termwidth = scr.getmaxyx()[1]
+            curses.endwin()
+        else:
+            self._normal = ''
+            # Default width is usually 80, but too wide is
+            # worse than too narrow
+            self.termwidth = 70
+
+    def formatMessage(self, record):
+        mlen = len(record.message)
+        right_text = '{initial}-{name}'.format(initial=record.levelname[0],
+                                               name=record.name)
+        if mlen + len(right_text) < self.termwidth:
+            space = ' ' * (self.termwidth - (mlen + len(right_text)))
+        else:
+            space = '  '
+
+        if record.levelno in self._colors:
+            start_color = self._colors[record.levelno]
+            end_color = self._normal
+        else:
+            start_color = end_color = ''
+
+        return record.message + space + start_color + right_text + end_color
+
+
+def enable_colourful_output(level=logging.INFO):
+    handler = logging.StreamHandler()
+    handler.setFormatter(LogFormatter())
+    logging.root.addHandler(handler)
+    logging.root.setLevel(level)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/compat.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/compat.py
new file mode 100644
index 0000000..8432acb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/compat.py
@@ -0,0 +1,34 @@
+"""Python 2/3 compatibility"""
+import json
+import sys
+
+
+# Handle reading and writing JSON in UTF-8, on Python 3 and 2.
+
+if sys.version_info[0] >= 3:
+    # Python 3
+    def write_json(obj, path, **kwargs):
+        with open(path, 'w', encoding='utf-8') as f:
+            json.dump(obj, f, **kwargs)
+
+    def read_json(path):
+        with open(path, 'r', encoding='utf-8') as f:
+            return json.load(f)
+
+else:
+    # Python 2
+    def write_json(obj, path, **kwargs):
+        with open(path, 'wb') as f:
+            json.dump(obj, f, encoding='utf-8', **kwargs)
+
+    def read_json(path):
+        with open(path, 'rb') as f:
+            return json.load(f)
+
+
+# FileNotFoundError
+
+try:
+    FileNotFoundError = FileNotFoundError
+except NameError:
+    FileNotFoundError = IOError
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/dirtools.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/dirtools.py
new file mode 100644
index 0000000..58c6ca0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/dirtools.py
@@ -0,0 +1,44 @@
+import os
+import io
+import contextlib
+import tempfile
+import shutil
+import errno
+import zipfile
+
+
+@contextlib.contextmanager
+def tempdir():
+    """Create a temporary directory in a context manager."""
+    td = tempfile.mkdtemp()
+    try:
+        yield td
+    finally:
+        shutil.rmtree(td)
+
+
+def mkdir_p(*args, **kwargs):
+    """Like `mkdir`, but does not raise an exception if the
+    directory already exists.
+    """
+    try:
+        return os.mkdir(*args, **kwargs)
+    except OSError as exc:
+        if exc.errno != errno.EEXIST:
+            raise
+
+
+def dir_to_zipfile(root):
+    """Construct an in-memory zip file for a directory."""
+    buffer = io.BytesIO()
+    zip_file = zipfile.ZipFile(buffer, 'w')
+    for root, dirs, files in os.walk(root):
+        for path in dirs:
+            fs_path = os.path.join(root, path)
+            rel_path = os.path.relpath(fs_path, root)
+            zip_file.writestr(rel_path + '/', '')
+        for path in files:
+            fs_path = os.path.join(root, path)
+            rel_path = os.path.relpath(fs_path, root)
+            zip_file.write(fs_path, rel_path)
+    return zip_file
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/envbuild.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/envbuild.py
new file mode 100644
index 0000000..4088dcd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/envbuild.py
@@ -0,0 +1,167 @@
+"""Build wheels/sdists by installing build deps to a temporary environment.
+"""
+
+import os
+import logging
+from pip._vendor import toml
+import shutil
+from subprocess import check_call
+import sys
+from sysconfig import get_paths
+from tempfile import mkdtemp
+
+from .wrappers import Pep517HookCaller, LoggerWrapper
+
+log = logging.getLogger(__name__)
+
+
+def _load_pyproject(source_dir):
+    with open(os.path.join(source_dir, 'pyproject.toml')) as f:
+        pyproject_data = toml.load(f)
+    buildsys = pyproject_data['build-system']
+    return (
+        buildsys['requires'],
+        buildsys['build-backend'],
+        buildsys.get('backend-path'),
+    )
+
+
+class BuildEnvironment(object):
+    """Context manager to install build deps in a simple temporary environment
+
+    Based on code I wrote for pip, which is MIT licensed.
+    """
+    # Copyright (c) 2008-2016 The pip developers (see AUTHORS.txt file)
+    #
+    # Permission is hereby granted, free of charge, to any person obtaining
+    # a copy of this software and associated documentation files (the
+    # "Software"), to deal in the Software without restriction, including
+    # without limitation the rights to use, copy, modify, merge, publish,
+    # distribute, sublicense, and/or sell copies of the Software, and to
+    # permit persons to whom the Software is furnished to do so, subject to
+    # the following conditions:
+    #
+    # The above copyright notice and this permission notice shall be
+    # included in all copies or substantial portions of the Software.
+    #
+    # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+    # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+    # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+    path = None
+
+    def __init__(self, cleanup=True):
+        self._cleanup = cleanup
+
+    def __enter__(self):
+        self.path = mkdtemp(prefix='pep517-build-env-')
+        log.info('Temporary build environment: %s', self.path)
+
+        self.save_path = os.environ.get('PATH', None)
+        self.save_pythonpath = os.environ.get('PYTHONPATH', None)
+
+        install_scheme = 'nt' if (os.name == 'nt') else 'posix_prefix'
+        install_dirs = get_paths(install_scheme, vars={
+            'base': self.path,
+            'platbase': self.path,
+        })
+
+        scripts = install_dirs['scripts']
+        if self.save_path:
+            os.environ['PATH'] = scripts + os.pathsep + self.save_path
+        else:
+            os.environ['PATH'] = scripts + os.pathsep + os.defpath
+
+        if install_dirs['purelib'] == install_dirs['platlib']:
+            lib_dirs = install_dirs['purelib']
+        else:
+            lib_dirs = install_dirs['purelib'] + os.pathsep + \
+                install_dirs['platlib']
+        if self.save_pythonpath:
+            os.environ['PYTHONPATH'] = lib_dirs + os.pathsep + \
+                self.save_pythonpath
+        else:
+            os.environ['PYTHONPATH'] = lib_dirs
+
+        return self
+
+    def pip_install(self, reqs):
+        """Install dependencies into this env by calling pip in a subprocess"""
+        if not reqs:
+            return
+        log.info('Calling pip to install %s', reqs)
+        cmd = [
+            sys.executable, '-m', 'pip', 'install', '--ignore-installed',
+            '--prefix', self.path] + list(reqs)
+        check_call(
+            cmd,
+            stdout=LoggerWrapper(log, logging.INFO),
+            stderr=LoggerWrapper(log, logging.ERROR),
+        )
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        needs_cleanup = (
+            self._cleanup and
+            self.path is not None and
+            os.path.isdir(self.path)
+        )
+        if needs_cleanup:
+            shutil.rmtree(self.path)
+
+        if self.save_path is None:
+            os.environ.pop('PATH', None)
+        else:
+            os.environ['PATH'] = self.save_path
+
+        if self.save_pythonpath is None:
+            os.environ.pop('PYTHONPATH', None)
+        else:
+            os.environ['PYTHONPATH'] = self.save_pythonpath
+
+
+def build_wheel(source_dir, wheel_dir, config_settings=None):
+    """Build a wheel from a source directory using PEP 517 hooks.
+
+    :param str source_dir: Source directory containing pyproject.toml
+    :param str wheel_dir: Target directory to create wheel in
+    :param dict config_settings: Options to pass to build backend
+
+    This is a blocking function which will run pip in a subprocess to install
+    build requirements.
+    """
+    if config_settings is None:
+        config_settings = {}
+    requires, backend, backend_path = _load_pyproject(source_dir)
+    hooks = Pep517HookCaller(source_dir, backend, backend_path)
+
+    with BuildEnvironment() as env:
+        env.pip_install(requires)
+        reqs = hooks.get_requires_for_build_wheel(config_settings)
+        env.pip_install(reqs)
+        return hooks.build_wheel(wheel_dir, config_settings)
+
+
+def build_sdist(source_dir, sdist_dir, config_settings=None):
+    """Build an sdist from a source directory using PEP 517 hooks.
+
+    :param str source_dir: Source directory containing pyproject.toml
+    :param str sdist_dir: Target directory to place sdist in
+    :param dict config_settings: Options to pass to build backend
+
+    This is a blocking function which will run pip in a subprocess to install
+    build requirements.
+    """
+    if config_settings is None:
+        config_settings = {}
+    requires, backend, backend_path = _load_pyproject(source_dir)
+    hooks = Pep517HookCaller(source_dir, backend, backend_path)
+
+    with BuildEnvironment() as env:
+        env.pip_install(requires)
+        reqs = hooks.get_requires_for_build_sdist(config_settings)
+        env.pip_install(reqs)
+        return hooks.build_sdist(sdist_dir, config_settings)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/meta.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/meta.py
new file mode 100644
index 0000000..d525de5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/meta.py
@@ -0,0 +1,92 @@
+"""Build metadata for a project using PEP 517 hooks.
+"""
+import argparse
+import logging
+import os
+import shutil
+import functools
+
+try:
+    import importlib.metadata as imp_meta
+except ImportError:
+    import importlib_metadata as imp_meta
+
+try:
+    from zipfile import Path
+except ImportError:
+    from zipp import Path
+
+from .envbuild import BuildEnvironment
+from .wrappers import Pep517HookCaller, quiet_subprocess_runner
+from .dirtools import tempdir, mkdir_p, dir_to_zipfile
+from .build import validate_system, load_system, compat_system
+
+log = logging.getLogger(__name__)
+
+
+def _prep_meta(hooks, env, dest):
+    reqs = hooks.get_requires_for_build_wheel({})
+    log.info('Got build requires: %s', reqs)
+
+    env.pip_install(reqs)
+    log.info('Installed dynamic build dependencies')
+
+    with tempdir() as td:
+        log.info('Trying to build metadata in %s', td)
+        filename = hooks.prepare_metadata_for_build_wheel(td, {})
+        source = os.path.join(td, filename)
+        shutil.move(source, os.path.join(dest, os.path.basename(filename)))
+
+
+def build(source_dir='.', dest=None, system=None):
+    system = system or load_system(source_dir)
+    dest = os.path.join(source_dir, dest or 'dist')
+    mkdir_p(dest)
+    validate_system(system)
+    hooks = Pep517HookCaller(
+        source_dir, system['build-backend'], system.get('backend-path')
+    )
+
+    with hooks.subprocess_runner(quiet_subprocess_runner):
+        with BuildEnvironment() as env:
+            env.pip_install(system['requires'])
+            _prep_meta(hooks, env, dest)
+
+
+def build_as_zip(builder=build):
+    with tempdir() as out_dir:
+        builder(dest=out_dir)
+        return dir_to_zipfile(out_dir)
+
+
+def load(root):
+    """
+    Given a source directory (root) of a package,
+    return an importlib.metadata.Distribution object
+    with metadata build from that package.
+    """
+    root = os.path.expanduser(root)
+    system = compat_system(root)
+    builder = functools.partial(build, source_dir=root, system=system)
+    path = Path(build_as_zip(builder))
+    return imp_meta.PathDistribution(path)
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument(
+    'source_dir',
+    help="A directory containing pyproject.toml",
+)
+parser.add_argument(
+    '--out-dir', '-o',
+    help="Destination in which to save the builds relative to source dir",
+)
+
+
+def main():
+    args = parser.parse_args()
+    build(args.source_dir, args.out_dir)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/wrappers.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/wrappers.py
new file mode 100644
index 0000000..00a3d1a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pep517/wrappers.py
@@ -0,0 +1,308 @@
+import threading
+from contextlib import contextmanager
+import os
+from os.path import dirname, abspath, join as pjoin
+import shutil
+from subprocess import check_call, check_output, STDOUT
+import sys
+from tempfile import mkdtemp
+
+from . import compat
+
+
+try:
+    import importlib.resources as resources
+
+    def _in_proc_script_path():
+        return resources.path(__package__, '_in_process.py')
+except ImportError:
+    @contextmanager
+    def _in_proc_script_path():
+        yield pjoin(dirname(abspath(__file__)), '_in_process.py')
+
+
+@contextmanager
+def tempdir():
+    td = mkdtemp()
+    try:
+        yield td
+    finally:
+        shutil.rmtree(td)
+
+
+class BackendUnavailable(Exception):
+    """Will be raised if the backend cannot be imported in the hook process."""
+    def __init__(self, traceback):
+        self.traceback = traceback
+
+
+class BackendInvalid(Exception):
+    """Will be raised if the backend is invalid."""
+    def __init__(self, backend_name, backend_path, message):
+        self.backend_name = backend_name
+        self.backend_path = backend_path
+        self.message = message
+
+
+class HookMissing(Exception):
+    """Will be raised on missing hooks."""
+    def __init__(self, hook_name):
+        super(HookMissing, self).__init__(hook_name)
+        self.hook_name = hook_name
+
+
+class UnsupportedOperation(Exception):
+    """May be raised by build_sdist if the backend indicates that it can't."""
+    def __init__(self, traceback):
+        self.traceback = traceback
+
+
+def default_subprocess_runner(cmd, cwd=None, extra_environ=None):
+    """The default method of calling the wrapper subprocess."""
+    env = os.environ.copy()
+    if extra_environ:
+        env.update(extra_environ)
+
+    check_call(cmd, cwd=cwd, env=env)
+
+
+def quiet_subprocess_runner(cmd, cwd=None, extra_environ=None):
+    """A method of calling the wrapper subprocess while suppressing output."""
+    env = os.environ.copy()
+    if extra_environ:
+        env.update(extra_environ)
+
+    check_output(cmd, cwd=cwd, env=env, stderr=STDOUT)
+
+
+def norm_and_check(source_tree, requested):
+    """Normalise and check a backend path.
+
+    Ensure that the requested backend path is specified as a relative path,
+    and resolves to a location under the given source tree.
+
+    Return an absolute version of the requested path.
+    """
+    if os.path.isabs(requested):
+        raise ValueError("paths must be relative")
+
+    abs_source = os.path.abspath(source_tree)
+    abs_requested = os.path.normpath(os.path.join(abs_source, requested))
+    # We have to use commonprefix for Python 2.7 compatibility. So we
+    # normalise case to avoid problems because commonprefix is a character
+    # based comparison :-(
+    norm_source = os.path.normcase(abs_source)
+    norm_requested = os.path.normcase(abs_requested)
+    if os.path.commonprefix([norm_source, norm_requested]) != norm_source:
+        raise ValueError("paths must be inside source tree")
+
+    return abs_requested
+
+
+class Pep517HookCaller(object):
+    """A wrapper around a source directory to be built with a PEP 517 backend.
+
+    source_dir : The path to the source directory, containing pyproject.toml.
+    build_backend : The build backend spec, as per PEP 517, from
+        pyproject.toml.
+    backend_path : The backend path, as per PEP 517, from pyproject.toml.
+    runner : A callable that invokes the wrapper subprocess.
+
+    The 'runner', if provided, must expect the following:
+        cmd : a list of strings representing the command and arguments to
+            execute, as would be passed to e.g. 'subprocess.check_call'.
+        cwd : a string representing the working directory that must be
+            used for the subprocess. Corresponds to the provided source_dir.
+        extra_environ : a dict mapping environment variable names to values
+            which must be set for the subprocess execution.
+    """
+    def __init__(
+            self,
+            source_dir,
+            build_backend,
+            backend_path=None,
+            runner=None,
+    ):
+        if runner is None:
+            runner = default_subprocess_runner
+
+        self.source_dir = abspath(source_dir)
+        self.build_backend = build_backend
+        if backend_path:
+            backend_path = [
+                norm_and_check(self.source_dir, p) for p in backend_path
+            ]
+        self.backend_path = backend_path
+        self._subprocess_runner = runner
+
+    @contextmanager
+    def subprocess_runner(self, runner):
+        """A context manager for temporarily overriding the default subprocess
+        runner.
+        """
+        prev = self._subprocess_runner
+        self._subprocess_runner = runner
+        try:
+            yield
+        finally:
+            self._subprocess_runner = prev
+
+    def get_requires_for_build_wheel(self, config_settings=None):
+        """Identify packages required for building a wheel
+
+        Returns a list of dependency specifications, e.g.:
+            ["wheel >= 0.25", "setuptools"]
+
+        This does not include requirements specified in pyproject.toml.
+        It returns the result of calling the equivalently named hook in a
+        subprocess.
+        """
+        return self._call_hook('get_requires_for_build_wheel', {
+            'config_settings': config_settings
+        })
+
+    def prepare_metadata_for_build_wheel(
+            self, metadata_directory, config_settings=None,
+            _allow_fallback=True):
+        """Prepare a *.dist-info folder with metadata for this project.
+
+        Returns the name of the newly created folder.
+
+        If the build backend defines a hook with this name, it will be called
+        in a subprocess. If not, the backend will be asked to build a wheel,
+        and the dist-info extracted from that (unless _allow_fallback is
+        False).
+        """
+        return self._call_hook('prepare_metadata_for_build_wheel', {
+            'metadata_directory': abspath(metadata_directory),
+            'config_settings': config_settings,
+            '_allow_fallback': _allow_fallback,
+        })
+
+    def build_wheel(
+            self, wheel_directory, config_settings=None,
+            metadata_directory=None):
+        """Build a wheel from this project.
+
+        Returns the name of the newly created file.
+
+        In general, this will call the 'build_wheel' hook in the backend.
+        However, if that was previously called by
+        'prepare_metadata_for_build_wheel', and the same metadata_directory is
+        used, the previously built wheel will be copied to wheel_directory.
+        """
+        if metadata_directory is not None:
+            metadata_directory = abspath(metadata_directory)
+        return self._call_hook('build_wheel', {
+            'wheel_directory': abspath(wheel_directory),
+            'config_settings': config_settings,
+            'metadata_directory': metadata_directory,
+        })
+
+    def get_requires_for_build_sdist(self, config_settings=None):
+        """Identify packages required for building a wheel
+
+        Returns a list of dependency specifications, e.g.:
+            ["setuptools >= 26"]
+
+        This does not include requirements specified in pyproject.toml.
+        It returns the result of calling the equivalently named hook in a
+        subprocess.
+        """
+        return self._call_hook('get_requires_for_build_sdist', {
+            'config_settings': config_settings
+        })
+
+    def build_sdist(self, sdist_directory, config_settings=None):
+        """Build an sdist from this project.
+
+        Returns the name of the newly created file.
+
+        This calls the 'build_sdist' backend hook in a subprocess.
+        """
+        return self._call_hook('build_sdist', {
+            'sdist_directory': abspath(sdist_directory),
+            'config_settings': config_settings,
+        })
+
+    def _call_hook(self, hook_name, kwargs):
+        # On Python 2, pytoml returns Unicode values (which is correct) but the
+        # environment passed to check_call needs to contain string values. We
+        # convert here by encoding using ASCII (the backend can only contain
+        # letters, digits and _, . and : characters, and will be used as a
+        # Python identifier, so non-ASCII content is wrong on Python 2 in
+        # any case).
+        # For backend_path, we use sys.getfilesystemencoding.
+        if sys.version_info[0] == 2:
+            build_backend = self.build_backend.encode('ASCII')
+        else:
+            build_backend = self.build_backend
+        extra_environ = {'PEP517_BUILD_BACKEND': build_backend}
+
+        if self.backend_path:
+            backend_path = os.pathsep.join(self.backend_path)
+            if sys.version_info[0] == 2:
+                backend_path = backend_path.encode(sys.getfilesystemencoding())
+            extra_environ['PEP517_BACKEND_PATH'] = backend_path
+
+        with tempdir() as td:
+            hook_input = {'kwargs': kwargs}
+            compat.write_json(hook_input, pjoin(td, 'input.json'),
+                              indent=2)
+
+            # Run the hook in a subprocess
+            with _in_proc_script_path() as script:
+                self._subprocess_runner(
+                    [sys.executable, str(script), hook_name, td],
+                    cwd=self.source_dir,
+                    extra_environ=extra_environ
+                )
+
+            data = compat.read_json(pjoin(td, 'output.json'))
+            if data.get('unsupported'):
+                raise UnsupportedOperation(data.get('traceback', ''))
+            if data.get('no_backend'):
+                raise BackendUnavailable(data.get('traceback', ''))
+            if data.get('backend_invalid'):
+                raise BackendInvalid(
+                    backend_name=self.build_backend,
+                    backend_path=self.backend_path,
+                    message=data.get('backend_error', '')
+                )
+            if data.get('hook_missing'):
+                raise HookMissing(hook_name)
+            return data['return_val']
+
+
+class LoggerWrapper(threading.Thread):
+    """
+    Read messages from a pipe and redirect them
+    to a logger (see python's logging module).
+    """
+
+    def __init__(self, logger, level):
+        threading.Thread.__init__(self)
+        self.daemon = True
+
+        self.logger = logger
+        self.level = level
+
+        # create the pipe and reader
+        self.fd_read, self.fd_write = os.pipe()
+        self.reader = os.fdopen(self.fd_read)
+
+        self.start()
+
+    def fileno(self):
+        return self.fd_write
+
+    @staticmethod
+    def remove_newline(msg):
+        return msg[:-1] if msg.endswith(os.linesep) else msg
+
+    def run(self):
+        for line in self.reader:
+            self._write(self.remove_newline(line))
+
+    def _write(self, message):
+        self.logger.log(self.level, message)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pkg_resources/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pkg_resources/__init__.py
new file mode 100644
index 0000000..a457ff2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pkg_resources/__init__.py
@@ -0,0 +1,3296 @@
+# coding: utf-8
+"""
+Package resource API
+--------------------
+
+A resource is a logical file contained within a package, or a logical
+subdirectory thereof.  The package resource API expects resource names
+to have their path parts separated with ``/``, *not* whatever the local
+path separator is.  Do not use os.path operations to manipulate resource
+names being passed into the API.
+
+The package resource API is designed to work with normal filesystem packages,
+.egg files, and unpacked .egg files.  It can also work in a limited way with
+.zip files and with custom PEP 302 loaders that support the ``get_data()``
+method.
+"""
+
+from __future__ import absolute_import
+
+import sys
+import os
+import io
+import time
+import re
+import types
+import zipfile
+import zipimport
+import warnings
+import stat
+import functools
+import pkgutil
+import operator
+import platform
+import collections
+import plistlib
+import email.parser
+import errno
+import tempfile
+import textwrap
+import itertools
+import inspect
+import ntpath
+import posixpath
+from pkgutil import get_importer
+
+try:
+    import _imp
+except ImportError:
+    # Python 3.2 compatibility
+    import imp as _imp
+
+try:
+    FileExistsError
+except NameError:
+    FileExistsError = OSError
+
+from pip._vendor import six
+from pip._vendor.six.moves import urllib, map, filter
+
+# capture these to bypass sandboxing
+from os import utime
+try:
+    from os import mkdir, rename, unlink
+    WRITE_SUPPORT = True
+except ImportError:
+    # no write support, probably under GAE
+    WRITE_SUPPORT = False
+
+from os import open as os_open
+from os.path import isdir, split
+
+try:
+    import importlib.machinery as importlib_machinery
+    # access attribute to force import under delayed import mechanisms.
+    importlib_machinery.__name__
+except ImportError:
+    importlib_machinery = None
+
+from . import py31compat
+from pip._vendor import appdirs
+from pip._vendor import packaging
+__import__('pip._vendor.packaging.version')
+__import__('pip._vendor.packaging.specifiers')
+__import__('pip._vendor.packaging.requirements')
+__import__('pip._vendor.packaging.markers')
+
+
+__metaclass__ = type
+
+
+if (3, 0) < sys.version_info < (3, 5):
+    raise RuntimeError("Python 3.5 or later is required")
+
+if six.PY2:
+    # Those builtin exceptions are only defined in Python 3
+    PermissionError = None
+    NotADirectoryError = None
+
+# declare some globals that will be defined later to
+# satisfy the linters.
+require = None
+working_set = None
+add_activation_listener = None
+resources_stream = None
+cleanup_resources = None
+resource_dir = None
+resource_stream = None
+set_extraction_path = None
+resource_isdir = None
+resource_string = None
+iter_entry_points = None
+resource_listdir = None
+resource_filename = None
+resource_exists = None
+_distribution_finders = None
+_namespace_handlers = None
+_namespace_packages = None
+
+
+class PEP440Warning(RuntimeWarning):
+    """
+    Used when there is an issue with a version or specifier not complying with
+    PEP 440.
+    """
+
+
+def parse_version(v):
+    try:
+        return packaging.version.Version(v)
+    except packaging.version.InvalidVersion:
+        return packaging.version.LegacyVersion(v)
+
+
+_state_vars = {}
+
+
+def _declare_state(vartype, **kw):
+    globals().update(kw)
+    _state_vars.update(dict.fromkeys(kw, vartype))
+
+
+def __getstate__():
+    state = {}
+    g = globals()
+    for k, v in _state_vars.items():
+        state[k] = g['_sget_' + v](g[k])
+    return state
+
+
+def __setstate__(state):
+    g = globals()
+    for k, v in state.items():
+        g['_sset_' + _state_vars[k]](k, g[k], v)
+    return state
+
+
+def _sget_dict(val):
+    return val.copy()
+
+
+def _sset_dict(key, ob, state):
+    ob.clear()
+    ob.update(state)
+
+
+def _sget_object(val):
+    return val.__getstate__()
+
+
+def _sset_object(key, ob, state):
+    ob.__setstate__(state)
+
+
+_sget_none = _sset_none = lambda *args: None
+
+
+def get_supported_platform():
+    """Return this platform's maximum compatible version.
+
+    distutils.util.get_platform() normally reports the minimum version
+    of Mac OS X that would be required to *use* extensions produced by
+    distutils.  But what we want when checking compatibility is to know the
+    version of Mac OS X that we are *running*.  To allow usage of packages that
+    explicitly require a newer version of Mac OS X, we must also know the
+    current version of the OS.
+
+    If this condition occurs for any other platform with a version in its
+    platform strings, this function should be extended accordingly.
+    """
+    plat = get_build_platform()
+    m = macosVersionString.match(plat)
+    if m is not None and sys.platform == "darwin":
+        try:
+            plat = 'macosx-%s-%s' % ('.'.join(_macosx_vers()[:2]), m.group(3))
+        except ValueError:
+            # not Mac OS X
+            pass
+    return plat
+
+
+__all__ = [
+    # Basic resource access and distribution/entry point discovery
+    'require', 'run_script', 'get_provider', 'get_distribution',
+    'load_entry_point', 'get_entry_map', 'get_entry_info',
+    'iter_entry_points',
+    'resource_string', 'resource_stream', 'resource_filename',
+    'resource_listdir', 'resource_exists', 'resource_isdir',
+
+    # Environmental control
+    'declare_namespace', 'working_set', 'add_activation_listener',
+    'find_distributions', 'set_extraction_path', 'cleanup_resources',
+    'get_default_cache',
+
+    # Primary implementation classes
+    'Environment', 'WorkingSet', 'ResourceManager',
+    'Distribution', 'Requirement', 'EntryPoint',
+
+    # Exceptions
+    'ResolutionError', 'VersionConflict', 'DistributionNotFound',
+    'UnknownExtra', 'ExtractionError',
+
+    # Warnings
+    'PEP440Warning',
+
+    # Parsing functions and string utilities
+    'parse_requirements', 'parse_version', 'safe_name', 'safe_version',
+    'get_platform', 'compatible_platforms', 'yield_lines', 'split_sections',
+    'safe_extra', 'to_filename', 'invalid_marker', 'evaluate_marker',
+
+    # filesystem utilities
+    'ensure_directory', 'normalize_path',
+
+    # Distribution "precedence" constants
+    'EGG_DIST', 'BINARY_DIST', 'SOURCE_DIST', 'CHECKOUT_DIST', 'DEVELOP_DIST',
+
+    # "Provider" interfaces, implementations, and registration/lookup APIs
+    'IMetadataProvider', 'IResourceProvider', 'FileMetadata',
+    'PathMetadata', 'EggMetadata', 'EmptyProvider', 'empty_provider',
+    'NullProvider', 'EggProvider', 'DefaultProvider', 'ZipProvider',
+    'register_finder', 'register_namespace_handler', 'register_loader_type',
+    'fixup_namespace_packages', 'get_importer',
+
+    # Warnings
+    'PkgResourcesDeprecationWarning',
+
+    # Deprecated/backward compatibility only
+    'run_main', 'AvailableDistributions',
+]
+
+
+class ResolutionError(Exception):
+    """Abstract base for dependency resolution errors"""
+
+    def __repr__(self):
+        return self.__class__.__name__ + repr(self.args)
+
+
+class VersionConflict(ResolutionError):
+    """
+    An already-installed version conflicts with the requested version.
+
+    Should be initialized with the installed Distribution and the requested
+    Requirement.
+    """
+
+    _template = "{self.dist} is installed but {self.req} is required"
+
+    @property
+    def dist(self):
+        return self.args[0]
+
+    @property
+    def req(self):
+        return self.args[1]
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def with_context(self, required_by):
+        """
+        If required_by is non-empty, return a version of self that is a
+        ContextualVersionConflict.
+        """
+        if not required_by:
+            return self
+        args = self.args + (required_by,)
+        return ContextualVersionConflict(*args)
+
+
+class ContextualVersionConflict(VersionConflict):
+    """
+    A VersionConflict that accepts a third parameter, the set of the
+    requirements that required the installed Distribution.
+    """
+
+    _template = VersionConflict._template + ' by {self.required_by}'
+
+    @property
+    def required_by(self):
+        return self.args[2]
+
+
+class DistributionNotFound(ResolutionError):
+    """A requested distribution was not found"""
+
+    _template = ("The '{self.req}' distribution was not found "
+                 "and is required by {self.requirers_str}")
+
+    @property
+    def req(self):
+        return self.args[0]
+
+    @property
+    def requirers(self):
+        return self.args[1]
+
+    @property
+    def requirers_str(self):
+        if not self.requirers:
+            return 'the application'
+        return ', '.join(self.requirers)
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def __str__(self):
+        return self.report()
+
+
+class UnknownExtra(ResolutionError):
+    """Distribution doesn't have an "extra feature" of the given name"""
+
+
+_provider_factories = {}
+
+PY_MAJOR = '{}.{}'.format(*sys.version_info)
+EGG_DIST = 3
+BINARY_DIST = 2
+SOURCE_DIST = 1
+CHECKOUT_DIST = 0
+DEVELOP_DIST = -1
+
+
+def register_loader_type(loader_type, provider_factory):
+    """Register `provider_factory` to make providers for `loader_type`
+
+    `loader_type` is the type or class of a PEP 302 ``module.__loader__``,
+    and `provider_factory` is a function that, passed a *module* object,
+    returns an ``IResourceProvider`` for that module.
+    """
+    _provider_factories[loader_type] = provider_factory
+
+
+def get_provider(moduleOrReq):
+    """Return an IResourceProvider for the named module or requirement"""
+    if isinstance(moduleOrReq, Requirement):
+        return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
+    try:
+        module = sys.modules[moduleOrReq]
+    except KeyError:
+        __import__(moduleOrReq)
+        module = sys.modules[moduleOrReq]
+    loader = getattr(module, '__loader__', None)
+    return _find_adapter(_provider_factories, loader)(module)
+
+
+def _macosx_vers(_cache=[]):
+    if not _cache:
+        version = platform.mac_ver()[0]
+        # fallback for MacPorts
+        if version == '':
+            plist = '/System/Library/CoreServices/SystemVersion.plist'
+            if os.path.exists(plist):
+                if hasattr(plistlib, 'readPlist'):
+                    plist_content = plistlib.readPlist(plist)
+                    if 'ProductVersion' in plist_content:
+                        version = plist_content['ProductVersion']
+
+        _cache.append(version.split('.'))
+    return _cache[0]
+
+
+def _macosx_arch(machine):
+    return {'PowerPC': 'ppc', 'Power_Macintosh': 'ppc'}.get(machine, machine)
+
+
+def get_build_platform():
+    """Return this platform's string for platform-specific distributions
+
+    XXX Currently this is the same as ``distutils.util.get_platform()``, but it
+    needs some hacks for Linux and Mac OS X.
+    """
+    from sysconfig import get_platform
+
+    plat = get_platform()
+    if sys.platform == "darwin" and not plat.startswith('macosx-'):
+        try:
+            version = _macosx_vers()
+            machine = os.uname()[4].replace(" ", "_")
+            return "macosx-%d.%d-%s" % (
+                int(version[0]), int(version[1]),
+                _macosx_arch(machine),
+            )
+        except ValueError:
+            # if someone is running a non-Mac darwin system, this will fall
+            # through to the default implementation
+            pass
+    return plat
+
+
+macosVersionString = re.compile(r"macosx-(\d+)\.(\d+)-(.*)")
+darwinVersionString = re.compile(r"darwin-(\d+)\.(\d+)\.(\d+)-(.*)")
+# XXX backward compat
+get_platform = get_build_platform
+
+
+def compatible_platforms(provided, required):
+    """Can code for the `provided` platform run on the `required` platform?
+
+    Returns true if either platform is ``None``, or the platforms are equal.
+
+    XXX Needs compatibility checks for Linux and other unixy OSes.
+    """
+    if provided is None or required is None or provided == required:
+        # easy case
+        return True
+
+    # Mac OS X special cases
+    reqMac = macosVersionString.match(required)
+    if reqMac:
+        provMac = macosVersionString.match(provided)
+
+        # is this a Mac package?
+        if not provMac:
+            # this is backwards compatibility for packages built before
+            # setuptools 0.6. All packages built after this point will
+            # use the new macosx designation.
+            provDarwin = darwinVersionString.match(provided)
+            if provDarwin:
+                dversion = int(provDarwin.group(1))
+                macosversion = "%s.%s" % (reqMac.group(1), reqMac.group(2))
+                if dversion == 7 and macosversion >= "10.3" or \
+                        dversion == 8 and macosversion >= "10.4":
+                    return True
+            # egg isn't macosx or legacy darwin
+            return False
+
+        # are they the same major version and machine type?
+        if provMac.group(1) != reqMac.group(1) or \
+                provMac.group(3) != reqMac.group(3):
+            return False
+
+        # is the required OS major update >= the provided one?
+        if int(provMac.group(2)) > int(reqMac.group(2)):
+            return False
+
+        return True
+
+    # XXX Linux and other platforms' special cases should go here
+    return False
+
+
+def run_script(dist_spec, script_name):
+    """Locate distribution `dist_spec` and run its `script_name` script"""
+    ns = sys._getframe(1).f_globals
+    name = ns['__name__']
+    ns.clear()
+    ns['__name__'] = name
+    require(dist_spec)[0].run_script(script_name, ns)
+
+
+# backward compatibility
+run_main = run_script
+
+
+def get_distribution(dist):
+    """Return a current distribution object for a Requirement or string"""
+    if isinstance(dist, six.string_types):
+        dist = Requirement.parse(dist)
+    if isinstance(dist, Requirement):
+        dist = get_provider(dist)
+    if not isinstance(dist, Distribution):
+        raise TypeError("Expected string, Requirement, or Distribution", dist)
+    return dist
+
+
+def load_entry_point(dist, group, name):
+    """Return `name` entry point of `group` for `dist` or raise ImportError"""
+    return get_distribution(dist).load_entry_point(group, name)
+
+
+def get_entry_map(dist, group=None):
+    """Return the entry point map for `group`, or the full entry map"""
+    return get_distribution(dist).get_entry_map(group)
+
+
+def get_entry_info(dist, group, name):
+    """Return the EntryPoint object for `group`+`name`, or ``None``"""
+    return get_distribution(dist).get_entry_info(group, name)
+
+
+class IMetadataProvider:
+    def has_metadata(name):
+        """Does the package's distribution contain the named metadata?"""
+
+    def get_metadata(name):
+        """The named metadata resource as a string"""
+
+    def get_metadata_lines(name):
+        """Yield named metadata resource as list of non-blank non-comment lines
+
+       Leading and trailing whitespace is stripped from each line, and lines
+       with ``#`` as the first non-blank character are omitted."""
+
+    def metadata_isdir(name):
+        """Is the named metadata a directory?  (like ``os.path.isdir()``)"""
+
+    def metadata_listdir(name):
+        """List of metadata names in the directory (like ``os.listdir()``)"""
+
+    def run_script(script_name, namespace):
+        """Execute the named script in the supplied namespace dictionary"""
+
+
+class IResourceProvider(IMetadataProvider):
+    """An object that provides access to package resources"""
+
+    def get_resource_filename(manager, resource_name):
+        """Return a true filesystem path for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_stream(manager, resource_name):
+        """Return a readable file-like object for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_string(manager, resource_name):
+        """Return a string containing the contents of `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def has_resource(resource_name):
+        """Does the package contain the named resource?"""
+
+    def resource_isdir(resource_name):
+        """Is the named resource a directory?  (like ``os.path.isdir()``)"""
+
+    def resource_listdir(resource_name):
+        """List of resource names in the directory (like ``os.listdir()``)"""
+
+
+class WorkingSet:
+    """A collection of active distributions on sys.path (or a similar list)"""
+
+    def __init__(self, entries=None):
+        """Create working set from list of path entries (default=sys.path)"""
+        self.entries = []
+        self.entry_keys = {}
+        self.by_key = {}
+        self.callbacks = []
+
+        if entries is None:
+            entries = sys.path
+
+        for entry in entries:
+            self.add_entry(entry)
+
+    @classmethod
+    def _build_master(cls):
+        """
+        Prepare the master working set.
+        """
+        ws = cls()
+        try:
+            from __main__ import __requires__
+        except ImportError:
+            # The main program does not list any requirements
+            return ws
+
+        # ensure the requirements are met
+        try:
+            ws.require(__requires__)
+        except VersionConflict:
+            return cls._build_from_requirements(__requires__)
+
+        return ws
+
+    @classmethod
+    def _build_from_requirements(cls, req_spec):
+        """
+        Build a working set from a requirement spec. Rewrites sys.path.
+        """
+        # try it without defaults already on sys.path
+        # by starting with an empty path
+        ws = cls([])
+        reqs = parse_requirements(req_spec)
+        dists = ws.resolve(reqs, Environment())
+        for dist in dists:
+            ws.add(dist)
+
+        # add any missing entries from sys.path
+        for entry in sys.path:
+            if entry not in ws.entries:
+                ws.add_entry(entry)
+
+        # then copy back to sys.path
+        sys.path[:] = ws.entries
+        return ws
+
+    def add_entry(self, entry):
+        """Add a path item to ``.entries``, finding any distributions on it
+
+        ``find_distributions(entry, True)`` is used to find distributions
+        corresponding to the path entry, and they are added.  `entry` is
+        always appended to ``.entries``, even if it is already present.
+        (This is because ``sys.path`` can contain the same value more than
+        once, and the ``.entries`` of the ``sys.path`` WorkingSet should always
+        equal ``sys.path``.)
+        """
+        self.entry_keys.setdefault(entry, [])
+        self.entries.append(entry)
+        for dist in find_distributions(entry, True):
+            self.add(dist, entry, False)
+
+    def __contains__(self, dist):
+        """True if `dist` is the active distribution for its project"""
+        return self.by_key.get(dist.key) == dist
+
+    def find(self, req):
+        """Find a distribution matching requirement `req`
+
+        If there is an active distribution for the requested project, this
+        returns it as long as it meets the version requirement specified by
+        `req`.  But, if there is an active distribution for the project and it
+        does *not* meet the `req` requirement, ``VersionConflict`` is raised.
+        If there is no active distribution for the requested project, ``None``
+        is returned.
+        """
+        dist = self.by_key.get(req.key)
+        if dist is not None and dist not in req:
+            # XXX add more info
+            raise VersionConflict(dist, req)
+        return dist
+
+    def iter_entry_points(self, group, name=None):
+        """Yield entry point objects from `group` matching `name`
+
+        If `name` is None, yields all entry points in `group` from all
+        distributions in the working set, otherwise only ones matching
+        both `group` and `name` are yielded (in distribution order).
+        """
+        return (
+            entry
+            for dist in self
+            for entry in dist.get_entry_map(group).values()
+            if name is None or name == entry.name
+        )
+
+    def run_script(self, requires, script_name):
+        """Locate distribution for `requires` and run `script_name` script"""
+        ns = sys._getframe(1).f_globals
+        name = ns['__name__']
+        ns.clear()
+        ns['__name__'] = name
+        self.require(requires)[0].run_script(script_name, ns)
+
+    def __iter__(self):
+        """Yield distributions for non-duplicate projects in the working set
+
+        The yield order is the order in which the items' path entries were
+        added to the working set.
+        """
+        seen = {}
+        for item in self.entries:
+            if item not in self.entry_keys:
+                # workaround a cache issue
+                continue
+
+            for key in self.entry_keys[item]:
+                if key not in seen:
+                    seen[key] = 1
+                    yield self.by_key[key]
+
+    def add(self, dist, entry=None, insert=True, replace=False):
+        """Add `dist` to working set, associated with `entry`
+
+        If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
+        On exit from this routine, `entry` is added to the end of the working
+        set's ``.entries`` (if it wasn't already present).
+
+        `dist` is only added to the working set if it's for a project that
+        doesn't already have a distribution in the set, unless `replace=True`.
+        If it's added, any callbacks registered with the ``subscribe()`` method
+        will be called.
+        """
+        if insert:
+            dist.insert_on(self.entries, entry, replace=replace)
+
+        if entry is None:
+            entry = dist.location
+        keys = self.entry_keys.setdefault(entry, [])
+        keys2 = self.entry_keys.setdefault(dist.location, [])
+        if not replace and dist.key in self.by_key:
+            # ignore hidden distros
+            return
+
+        self.by_key[dist.key] = dist
+        if dist.key not in keys:
+            keys.append(dist.key)
+        if dist.key not in keys2:
+            keys2.append(dist.key)
+        self._added_new(dist)
+
+    def resolve(self, requirements, env=None, installer=None,
+                replace_conflicting=False, extras=None):
+        """List all distributions needed to (recursively) meet `requirements`
+
+        `requirements` must be a sequence of ``Requirement`` objects.  `env`,
+        if supplied, should be an ``Environment`` instance.  If
+        not supplied, it defaults to all distributions available within any
+        entry or distribution in the working set.  `installer`, if supplied,
+        will be invoked with each requirement that cannot be met by an
+        already-installed distribution; it should return a ``Distribution`` or
+        ``None``.
+
+        Unless `replace_conflicting=True`, raises a VersionConflict exception
+        if
+        any requirements are found on the path that have the correct name but
+        the wrong version.  Otherwise, if an `installer` is supplied it will be
+        invoked to obtain the correct version of the requirement and activate
+        it.
+
+        `extras` is a list of the extras to be used with these requirements.
+        This is important because extra requirements may look like `my_req;
+        extra = "my_extra"`, which would otherwise be interpreted as a purely
+        optional requirement.  Instead, we want to be able to assert that these
+        requirements are truly required.
+        """
+
+        # set up the stack
+        requirements = list(requirements)[::-1]
+        # set of processed requirements
+        processed = {}
+        # key -> dist
+        best = {}
+        to_activate = []
+
+        req_extras = _ReqExtras()
+
+        # Mapping of requirement to set of distributions that required it;
+        # useful for reporting info about conflicts.
+        required_by = collections.defaultdict(set)
+
+        while requirements:
+            # process dependencies breadth-first
+            req = requirements.pop(0)
+            if req in processed:
+                # Ignore cyclic or redundant dependencies
+                continue
+
+            if not req_extras.markers_pass(req, extras):
+                continue
+
+            dist = best.get(req.key)
+            if dist is None:
+                # Find the best distribution and add it to the map
+                dist = self.by_key.get(req.key)
+                if dist is None or (dist not in req and replace_conflicting):
+                    ws = self
+                    if env is None:
+                        if dist is None:
+                            env = Environment(self.entries)
+                        else:
+                            # Use an empty environment and workingset to avoid
+                            # any further conflicts with the conflicting
+                            # distribution
+                            env = Environment([])
+                            ws = WorkingSet([])
+                    dist = best[req.key] = env.best_match(
+                        req, ws, installer,
+                        replace_conflicting=replace_conflicting
+                    )
+                    if dist is None:
+                        requirers = required_by.get(req, None)
+                        raise DistributionNotFound(req, requirers)
+                to_activate.append(dist)
+            if dist not in req:
+                # Oops, the "best" so far conflicts with a dependency
+                dependent_req = required_by[req]
+                raise VersionConflict(dist, req).with_context(dependent_req)
+
+            # push the new requirements onto the stack
+            new_requirements = dist.requires(req.extras)[::-1]
+            requirements.extend(new_requirements)
+
+            # Register the new requirements needed by req
+            for new_requirement in new_requirements:
+                required_by[new_requirement].add(req.project_name)
+                req_extras[new_requirement] = req.extras
+
+            processed[req] = True
+
+        # return list of distros to activate
+        return to_activate
+
+    def find_plugins(
+            self, plugin_env, full_env=None, installer=None, fallback=True):
+        """Find all activatable distributions in `plugin_env`
+
+        Example usage::
+
+            distributions, errors = working_set.find_plugins(
+                Environment(plugin_dirlist)
+            )
+            # add plugins+libs to sys.path
+            map(working_set.add, distributions)
+            # display errors
+            print('Could not load', errors)
+
+        The `plugin_env` should be an ``Environment`` instance that contains
+        only distributions that are in the project's "plugin directory" or
+        directories. The `full_env`, if supplied, should be an ``Environment``
+        contains all currently-available distributions.  If `full_env` is not
+        supplied, one is created automatically from the ``WorkingSet`` this
+        method is called on, which will typically mean that every directory on
+        ``sys.path`` will be scanned for distributions.
+
+        `installer` is a standard installer callback as used by the
+        ``resolve()`` method. The `fallback` flag indicates whether we should
+        attempt to resolve older versions of a plugin if the newest version
+        cannot be resolved.
+
+        This method returns a 2-tuple: (`distributions`, `error_info`), where
+        `distributions` is a list of the distributions found in `plugin_env`
+        that were loadable, along with any other distributions that are needed
+        to resolve their dependencies.  `error_info` is a dictionary mapping
+        unloadable plugin distributions to an exception instance describing the
+        error that occurred. Usually this will be a ``DistributionNotFound`` or
+        ``VersionConflict`` instance.
+        """
+
+        plugin_projects = list(plugin_env)
+        # scan project names in alphabetic order
+        plugin_projects.sort()
+
+        error_info = {}
+        distributions = {}
+
+        if full_env is None:
+            env = Environment(self.entries)
+            env += plugin_env
+        else:
+            env = full_env + plugin_env
+
+        shadow_set = self.__class__([])
+        # put all our entries in shadow_set
+        list(map(shadow_set.add, self))
+
+        for project_name in plugin_projects:
+
+            for dist in plugin_env[project_name]:
+
+                req = [dist.as_requirement()]
+
+                try:
+                    resolvees = shadow_set.resolve(req, env, installer)
+
+                except ResolutionError as v:
+                    # save error info
+                    error_info[dist] = v
+                    if fallback:
+                        # try the next older version of project
+                        continue
+                    else:
+                        # give up on this project, keep going
+                        break
+
+                else:
+                    list(map(shadow_set.add, resolvees))
+                    distributions.update(dict.fromkeys(resolvees))
+
+                    # success, no need to try any more versions of this project
+                    break
+
+        distributions = list(distributions)
+        distributions.sort()
+
+        return distributions, error_info
+
+    def require(self, *requirements):
+        """Ensure that distributions matching `requirements` are activated
+
+        `requirements` must be a string or a (possibly-nested) sequence
+        thereof, specifying the distributions and versions required.  The
+        return value is a sequence of the distributions that needed to be
+        activated to fulfill the requirements; all relevant distributions are
+        included, even if they were already activated in this working set.
+        """
+        needed = self.resolve(parse_requirements(requirements))
+
+        for dist in needed:
+            self.add(dist)
+
+        return needed
+
+    def subscribe(self, callback, existing=True):
+        """Invoke `callback` for all distributions
+
+        If `existing=True` (default),
+        call on all existing ones, as well.
+        """
+        if callback in self.callbacks:
+            return
+        self.callbacks.append(callback)
+        if not existing:
+            return
+        for dist in self:
+            callback(dist)
+
+    def _added_new(self, dist):
+        for callback in self.callbacks:
+            callback(dist)
+
+    def __getstate__(self):
+        return (
+            self.entries[:], self.entry_keys.copy(), self.by_key.copy(),
+            self.callbacks[:]
+        )
+
+    def __setstate__(self, e_k_b_c):
+        entries, keys, by_key, callbacks = e_k_b_c
+        self.entries = entries[:]
+        self.entry_keys = keys.copy()
+        self.by_key = by_key.copy()
+        self.callbacks = callbacks[:]
+
+
+class _ReqExtras(dict):
+    """
+    Map each requirement to the extras that demanded it.
+    """
+
+    def markers_pass(self, req, extras=None):
+        """
+        Evaluate markers for req against each extra that
+        demanded it.
+
+        Return False if the req has a marker and fails
+        evaluation. Otherwise, return True.
+        """
+        extra_evals = (
+            req.marker.evaluate({'extra': extra})
+            for extra in self.get(req, ()) + (extras or (None,))
+        )
+        return not req.marker or any(extra_evals)
+
+
+class Environment:
+    """Searchable snapshot of distributions on a search path"""
+
+    def __init__(
+            self, search_path=None, platform=get_supported_platform(),
+            python=PY_MAJOR):
+        """Snapshot distributions available on a search path
+
+        Any distributions found on `search_path` are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.
+
+        `platform` is an optional string specifying the name of the platform
+        that platform-specific distributions must be compatible with.  If
+        unspecified, it defaults to the current platform.  `python` is an
+        optional string naming the desired version of Python (e.g. ``'3.6'``);
+        it defaults to the current version.
+
+        You may explicitly set `platform` (and/or `python`) to ``None`` if you
+        wish to map *all* distributions, not just those compatible with the
+        running platform or Python version.
+        """
+        self._distmap = {}
+        self.platform = platform
+        self.python = python
+        self.scan(search_path)
+
+    def can_add(self, dist):
+        """Is distribution `dist` acceptable for this environment?
+
+        The distribution must match the platform and python version
+        requirements specified when this environment was created, or False
+        is returned.
+        """
+        py_compat = (
+            self.python is None
+            or dist.py_version is None
+            or dist.py_version == self.python
+        )
+        return py_compat and compatible_platforms(dist.platform, self.platform)
+
+    def remove(self, dist):
+        """Remove `dist` from the environment"""
+        self._distmap[dist.key].remove(dist)
+
+    def scan(self, search_path=None):
+        """Scan `search_path` for distributions usable in this environment
+
+        Any distributions found are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.  Only distributions conforming to
+        the platform/python version defined at initialization are added.
+        """
+        if search_path is None:
+            search_path = sys.path
+
+        for item in search_path:
+            for dist in find_distributions(item):
+                self.add(dist)
+
+    def __getitem__(self, project_name):
+        """Return a newest-to-oldest list of distributions for `project_name`
+
+        Uses case-insensitive `project_name` comparison, assuming all the
+        project's distributions use their project's name converted to all
+        lowercase as their key.
+
+        """
+        distribution_key = project_name.lower()
+        return self._distmap.get(distribution_key, [])
+
+    def add(self, dist):
+        """Add `dist` if we ``can_add()`` it and it has not already been added
+        """
+        if self.can_add(dist) and dist.has_version():
+            dists = self._distmap.setdefault(dist.key, [])
+            if dist not in dists:
+                dists.append(dist)
+                dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
+
+    def best_match(
+            self, req, working_set, installer=None, replace_conflicting=False):
+        """Find distribution best matching `req` and usable on `working_set`
+
+        This calls the ``find(req)`` method of the `working_set` to see if a
+        suitable distribution is already active.  (This may raise
+        ``VersionConflict`` if an unsuitable version of the project is already
+        active in the specified `working_set`.)  If a suitable distribution
+        isn't active, this method returns the newest distribution in the
+        environment that meets the ``Requirement`` in `req`.  If no suitable
+        distribution is found, and `installer` is supplied, then the result of
+        calling the environment's ``obtain(req, installer)`` method will be
+        returned.
+        """
+        try:
+            dist = working_set.find(req)
+        except VersionConflict:
+            if not replace_conflicting:
+                raise
+            dist = None
+        if dist is not None:
+            return dist
+        for dist in self[req.key]:
+            if dist in req:
+                return dist
+        # try to download/install
+        return self.obtain(req, installer)
+
+    def obtain(self, requirement, installer=None):
+        """Obtain a distribution matching `requirement` (e.g. via download)
+
+        Obtain a distro that matches requirement (e.g. via download).  In the
+        base ``Environment`` class, this routine just returns
+        ``installer(requirement)``, unless `installer` is None, in which case
+        None is returned instead.  This method is a hook that allows subclasses
+        to attempt other ways of obtaining a distribution before falling back
+        to the `installer` argument."""
+        if installer is not None:
+            return installer(requirement)
+
+    def __iter__(self):
+        """Yield the unique project names of the available distributions"""
+        for key in self._distmap.keys():
+            if self[key]:
+                yield key
+
+    def __iadd__(self, other):
+        """In-place addition of a distribution or environment"""
+        if isinstance(other, Distribution):
+            self.add(other)
+        elif isinstance(other, Environment):
+            for project in other:
+                for dist in other[project]:
+                    self.add(dist)
+        else:
+            raise TypeError("Can't add %r to environment" % (other,))
+        return self
+
+    def __add__(self, other):
+        """Add an environment or distribution to an environment"""
+        new = self.__class__([], platform=None, python=None)
+        for env in self, other:
+            new += env
+        return new
+
+
+# XXX backward compatibility
+AvailableDistributions = Environment
+
+
+class ExtractionError(RuntimeError):
+    """An error occurred extracting a resource
+
+    The following attributes are available from instances of this exception:
+
+    manager
+        The resource manager that raised this exception
+
+    cache_path
+        The base directory for resource extraction
+
+    original_error
+        The exception instance that caused extraction to fail
+    """
+
+
+class ResourceManager:
+    """Manage resource extraction and packages"""
+    extraction_path = None
+
+    def __init__(self):
+        self.cached_files = {}
+
+    def resource_exists(self, package_or_requirement, resource_name):
+        """Does the named resource exist?"""
+        return get_provider(package_or_requirement).has_resource(resource_name)
+
+    def resource_isdir(self, package_or_requirement, resource_name):
+        """Is the named resource an existing directory?"""
+        return get_provider(package_or_requirement).resource_isdir(
+            resource_name
+        )
+
+    def resource_filename(self, package_or_requirement, resource_name):
+        """Return a true filesystem path for specified resource"""
+        return get_provider(package_or_requirement).get_resource_filename(
+            self, resource_name
+        )
+
+    def resource_stream(self, package_or_requirement, resource_name):
+        """Return a readable file-like object for specified resource"""
+        return get_provider(package_or_requirement).get_resource_stream(
+            self, resource_name
+        )
+
+    def resource_string(self, package_or_requirement, resource_name):
+        """Return specified resource as a string"""
+        return get_provider(package_or_requirement).get_resource_string(
+            self, resource_name
+        )
+
+    def resource_listdir(self, package_or_requirement, resource_name):
+        """List the contents of the named resource directory"""
+        return get_provider(package_or_requirement).resource_listdir(
+            resource_name
+        )
+
+    def extraction_error(self):
+        """Give an error message for problems extracting file(s)"""
+
+        old_exc = sys.exc_info()[1]
+        cache_path = self.extraction_path or get_default_cache()
+
+        tmpl = textwrap.dedent("""
+            Can't extract file(s) to egg cache
+
+            The following error occurred while trying to extract file(s)
+            to the Python egg cache:
+
+              {old_exc}
+
+            The Python egg cache directory is currently set to:
+
+              {cache_path}
+
+            Perhaps your account does not have write access to this directory?
+            You can change the cache directory by setting the PYTHON_EGG_CACHE
+            environment variable to point to an accessible directory.
+            """).lstrip()
+        err = ExtractionError(tmpl.format(**locals()))
+        err.manager = self
+        err.cache_path = cache_path
+        err.original_error = old_exc
+        raise err
+
+    def get_cache_path(self, archive_name, names=()):
+        """Return absolute location in cache for `archive_name` and `names`
+
+        The parent directory of the resulting path will be created if it does
+        not already exist.  `archive_name` should be the base filename of the
+        enclosing egg (which may not be the name of the enclosing zipfile!),
+        including its ".egg" extension.  `names`, if provided, should be a
+        sequence of path name parts "under" the egg's extraction location.
+
+        This method should only be called by resource providers that need to
+        obtain an extraction location, and only for names they intend to
+        extract, as it tracks the generated names for possible cleanup later.
+        """
+        extract_path = self.extraction_path or get_default_cache()
+        target_path = os.path.join(extract_path, archive_name + '-tmp', *names)
+        try:
+            _bypass_ensure_directory(target_path)
+        except Exception:
+            self.extraction_error()
+
+        self._warn_unsafe_extraction_path(extract_path)
+
+        self.cached_files[target_path] = 1
+        return target_path
+
+    @staticmethod
+    def _warn_unsafe_extraction_path(path):
+        """
+        If the default extraction path is overridden and set to an insecure
+        location, such as /tmp, it opens up an opportunity for an attacker to
+        replace an extracted file with an unauthorized payload. Warn the user
+        if a known insecure location is used.
+
+        See Distribute #375 for more details.
+        """
+        if os.name == 'nt' and not path.startswith(os.environ['windir']):
+            # On Windows, permissions are generally restrictive by default
+            #  and temp directories are not writable by other users, so
+            #  bypass the warning.
+            return
+        mode = os.stat(path).st_mode
+        if mode & stat.S_IWOTH or mode & stat.S_IWGRP:
+            msg = (
+                "%s is writable by group/others and vulnerable to attack "
+                "when "
+                "used with get_resource_filename. Consider a more secure "
+                "location (set with .set_extraction_path or the "
+                "PYTHON_EGG_CACHE environment variable)." % path
+            )
+            warnings.warn(msg, UserWarning)
+
+    def postprocess(self, tempname, filename):
+        """Perform any platform-specific postprocessing of `tempname`
+
+        This is where Mac header rewrites should be done; other platforms don't
+        have anything special they should do.
+
+        Resource providers should call this method ONLY after successfully
+        extracting a compressed resource.  They must NOT call it on resources
+        that are already in the filesystem.
+
+        `tempname` is the current (temporary) name of the file, and `filename`
+        is the name it will be renamed to by the caller after this routine
+        returns.
+        """
+
+        if os.name == 'posix':
+            # Make the resource executable
+            mode = ((os.stat(tempname).st_mode) | 0o555) & 0o7777
+            os.chmod(tempname, mode)
+
+    def set_extraction_path(self, path):
+        """Set the base path where resources will be extracted to, if needed.
+
+        If you do not call this routine before any extractions take place, the
+        path defaults to the return value of ``get_default_cache()``.  (Which
+        is based on the ``PYTHON_EGG_CACHE`` environment variable, with various
+        platform-specific fallbacks.  See that routine's documentation for more
+        details.)
+
+        Resources are extracted to subdirectories of this path based upon
+        information given by the ``IResourceProvider``.  You may set this to a
+        temporary directory, but then you must call ``cleanup_resources()`` to
+        delete the extracted files when done.  There is no guarantee that
+        ``cleanup_resources()`` will be able to remove all extracted files.
+
+        (Note: you may not change the extraction path for a given resource
+        manager once resources have been extracted, unless you first call
+        ``cleanup_resources()``.)
+        """
+        if self.cached_files:
+            raise ValueError(
+                "Can't change extraction path, files already extracted"
+            )
+
+        self.extraction_path = path
+
+    def cleanup_resources(self, force=False):
+        """
+        Delete all extracted resource files and directories, returning a list
+        of the file and directory names that could not be successfully removed.
+        This function does not have any concurrency protection, so it should
+        generally only be called when the extraction path is a temporary
+        directory exclusive to a single process.  This method is not
+        automatically called; you must call it explicitly or register it as an
+        ``atexit`` function if you wish to ensure cleanup of a temporary
+        directory used for extractions.
+        """
+        # XXX
+
+
+def get_default_cache():
+    """
+    Return the ``PYTHON_EGG_CACHE`` environment variable
+    or a platform-relevant user cache dir for an app
+    named "Python-Eggs".
+    """
+    return (
+        os.environ.get('PYTHON_EGG_CACHE')
+        or appdirs.user_cache_dir(appname='Python-Eggs')
+    )
+
+
+def safe_name(name):
+    """Convert an arbitrary string to a standard distribution name
+
+    Any runs of non-alphanumeric/. characters are replaced with a single '-'.
+    """
+    return re.sub('[^A-Za-z0-9.]+', '-', name)
+
+
+def safe_version(version):
+    """
+    Convert an arbitrary string to a standard version string
+    """
+    try:
+        # normalize the version
+        return str(packaging.version.Version(version))
+    except packaging.version.InvalidVersion:
+        version = version.replace(' ', '.')
+        return re.sub('[^A-Za-z0-9.]+', '-', version)
+
+
+def safe_extra(extra):
+    """Convert an arbitrary string to a standard 'extra' name
+
+    Any runs of non-alphanumeric characters are replaced with a single '_',
+    and the result is always lowercased.
+    """
+    return re.sub('[^A-Za-z0-9.-]+', '_', extra).lower()
+
+
+def to_filename(name):
+    """Convert a project or version name to its filename-escaped form
+
+    Any '-' characters are currently replaced with '_'.
+    """
+    return name.replace('-', '_')
+
+
+def invalid_marker(text):
+    """
+    Validate text as a PEP 508 environment marker; return an exception
+    if invalid or False otherwise.
+    """
+    try:
+        evaluate_marker(text)
+    except SyntaxError as e:
+        e.filename = None
+        e.lineno = None
+        return e
+    return False
+
+
+def evaluate_marker(text, extra=None):
+    """
+    Evaluate a PEP 508 environment marker.
+    Return a boolean indicating the marker result in this environment.
+    Raise SyntaxError if marker is invalid.
+
+    This implementation uses the 'pyparsing' module.
+    """
+    try:
+        marker = packaging.markers.Marker(text)
+        return marker.evaluate()
+    except packaging.markers.InvalidMarker as e:
+        raise SyntaxError(e)
+
+
+class NullProvider:
+    """Try to implement resources and metadata for arbitrary PEP 302 loaders"""
+
+    egg_name = None
+    egg_info = None
+    loader = None
+
+    def __init__(self, module):
+        self.loader = getattr(module, '__loader__', None)
+        self.module_path = os.path.dirname(getattr(module, '__file__', ''))
+
+    def get_resource_filename(self, manager, resource_name):
+        return self._fn(self.module_path, resource_name)
+
+    def get_resource_stream(self, manager, resource_name):
+        return io.BytesIO(self.get_resource_string(manager, resource_name))
+
+    def get_resource_string(self, manager, resource_name):
+        return self._get(self._fn(self.module_path, resource_name))
+
+    def has_resource(self, resource_name):
+        return self._has(self._fn(self.module_path, resource_name))
+
+    def _get_metadata_path(self, name):
+        return self._fn(self.egg_info, name)
+
+    def has_metadata(self, name):
+        if not self.egg_info:
+            return self.egg_info
+
+        path = self._get_metadata_path(name)
+        return self._has(path)
+
+    def get_metadata(self, name):
+        if not self.egg_info:
+            return ""
+        path = self._get_metadata_path(name)
+        value = self._get(path)
+        if six.PY2:
+            return value
+        try:
+            return value.decode('utf-8')
+        except UnicodeDecodeError as exc:
+            # Include the path in the error message to simplify
+            # troubleshooting, and without changing the exception type.
+            exc.reason += ' in {} file at path: {}'.format(name, path)
+            raise
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+    def resource_isdir(self, resource_name):
+        return self._isdir(self._fn(self.module_path, resource_name))
+
+    def metadata_isdir(self, name):
+        return self.egg_info and self._isdir(self._fn(self.egg_info, name))
+
+    def resource_listdir(self, resource_name):
+        return self._listdir(self._fn(self.module_path, resource_name))
+
+    def metadata_listdir(self, name):
+        if self.egg_info:
+            return self._listdir(self._fn(self.egg_info, name))
+        return []
+
+    def run_script(self, script_name, namespace):
+        script = 'scripts/' + script_name
+        if not self.has_metadata(script):
+            raise ResolutionError(
+                "Script {script!r} not found in metadata at {self.egg_info!r}"
+                .format(**locals()),
+            )
+        script_text = self.get_metadata(script).replace('\r\n', '\n')
+        script_text = script_text.replace('\r', '\n')
+        script_filename = self._fn(self.egg_info, script)
+        namespace['__file__'] = script_filename
+        if os.path.exists(script_filename):
+            source = open(script_filename).read()
+            code = compile(source, script_filename, 'exec')
+            exec(code, namespace, namespace)
+        else:
+            from linecache import cache
+            cache[script_filename] = (
+                len(script_text), 0, script_text.split('\n'), script_filename
+            )
+            script_code = compile(script_text, script_filename, 'exec')
+            exec(script_code, namespace, namespace)
+
+    def _has(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _isdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _listdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _fn(self, base, resource_name):
+        self._validate_resource_path(resource_name)
+        if resource_name:
+            return os.path.join(base, *resource_name.split('/'))
+        return base
+
+    @staticmethod
+    def _validate_resource_path(path):
+        """
+        Validate the resource paths according to the docs.
+        https://setuptools.readthedocs.io/en/latest/pkg_resources.html#basic-resource-access
+
+        >>> warned = getfixture('recwarn')
+        >>> warnings.simplefilter('always')
+        >>> vrp = NullProvider._validate_resource_path
+        >>> vrp('foo/bar.txt')
+        >>> bool(warned)
+        False
+        >>> vrp('../foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('/foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> vrp('foo/../../bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('foo/f../bar.txt')
+        >>> bool(warned)
+        False
+
+        Windows path separators are straight-up disallowed.
+        >>> vrp(r'\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        >>> vrp(r'C:\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        Blank values are allowed
+
+        >>> vrp('')
+        >>> bool(warned)
+        False
+
+        Non-string values are not.
+
+        >>> vrp(None)
+        Traceback (most recent call last):
+        ...
+        AttributeError: ...
+        """
+        invalid = (
+            os.path.pardir in path.split(posixpath.sep) or
+            posixpath.isabs(path) or
+            ntpath.isabs(path)
+        )
+        if not invalid:
+            return
+
+        msg = "Use of .. or absolute path in a resource path is not allowed."
+
+        # Aggressively disallow Windows absolute paths
+        if ntpath.isabs(path) and not posixpath.isabs(path):
+            raise ValueError(msg)
+
+        # for compatibility, warn; in future
+        # raise ValueError(msg)
+        warnings.warn(
+            msg[:-1] + " and will raise exceptions in a future release.",
+            DeprecationWarning,
+            stacklevel=4,
+        )
+
+    def _get(self, path):
+        if hasattr(self.loader, 'get_data'):
+            return self.loader.get_data(path)
+        raise NotImplementedError(
+            "Can't perform this operation for loaders without 'get_data()'"
+        )
+
+
+register_loader_type(object, NullProvider)
+
+
+class EggProvider(NullProvider):
+    """Provider based on a virtual filesystem"""
+
+    def __init__(self, module):
+        NullProvider.__init__(self, module)
+        self._setup_prefix()
+
+    def _setup_prefix(self):
+        # we assume here that our metadata may be nested inside a "basket"
+        # of multiple eggs; that's why we use module_path instead of .archive
+        path = self.module_path
+        old = None
+        while path != old:
+            if _is_egg_path(path):
+                self.egg_name = os.path.basename(path)
+                self.egg_info = os.path.join(path, 'EGG-INFO')
+                self.egg_root = path
+                break
+            old = path
+            path, base = os.path.split(path)
+
+
+class DefaultProvider(EggProvider):
+    """Provides access to package resources in the filesystem"""
+
+    def _has(self, path):
+        return os.path.exists(path)
+
+    def _isdir(self, path):
+        return os.path.isdir(path)
+
+    def _listdir(self, path):
+        return os.listdir(path)
+
+    def get_resource_stream(self, manager, resource_name):
+        return open(self._fn(self.module_path, resource_name), 'rb')
+
+    def _get(self, path):
+        with open(path, 'rb') as stream:
+            return stream.read()
+
+    @classmethod
+    def _register(cls):
+        loader_names = 'SourceFileLoader', 'SourcelessFileLoader',
+        for name in loader_names:
+            loader_cls = getattr(importlib_machinery, name, type(None))
+            register_loader_type(loader_cls, cls)
+
+
+DefaultProvider._register()
+
+
+class EmptyProvider(NullProvider):
+    """Provider that returns nothing for all requests"""
+
+    module_path = None
+
+    _isdir = _has = lambda self, path: False
+
+    def _get(self, path):
+        return ''
+
+    def _listdir(self, path):
+        return []
+
+    def __init__(self):
+        pass
+
+
+empty_provider = EmptyProvider()
+
+
+class ZipManifests(dict):
+    """
+    zip manifest builder
+    """
+
+    @classmethod
+    def build(cls, path):
+        """
+        Build a dictionary similar to the zipimport directory
+        caches, except instead of tuples, store ZipInfo objects.
+
+        Use a platform-specific path separator (os.sep) for the path keys
+        for compatibility with pypy on Windows.
+        """
+        with zipfile.ZipFile(path) as zfile:
+            items = (
+                (
+                    name.replace('/', os.sep),
+                    zfile.getinfo(name),
+                )
+                for name in zfile.namelist()
+            )
+            return dict(items)
+
+    load = build
+
+
+class MemoizedZipManifests(ZipManifests):
+    """
+    Memoized zipfile manifests.
+    """
+    manifest_mod = collections.namedtuple('manifest_mod', 'manifest mtime')
+
+    def load(self, path):
+        """
+        Load a manifest at path or return a suitable manifest already loaded.
+        """
+        path = os.path.normpath(path)
+        mtime = os.stat(path).st_mtime
+
+        if path not in self or self[path].mtime != mtime:
+            manifest = self.build(path)
+            self[path] = self.manifest_mod(manifest, mtime)
+
+        return self[path].manifest
+
+
+class ZipProvider(EggProvider):
+    """Resource support for zips and eggs"""
+
+    eagers = None
+    _zip_manifests = MemoizedZipManifests()
+
+    def __init__(self, module):
+        EggProvider.__init__(self, module)
+        self.zip_pre = self.loader.archive + os.sep
+
+    def _zipinfo_name(self, fspath):
+        # Convert a virtual filename (full path to file) into a zipfile subpath
+        # usable with the zipimport directory cache for our target archive
+        fspath = fspath.rstrip(os.sep)
+        if fspath == self.loader.archive:
+            return ''
+        if fspath.startswith(self.zip_pre):
+            return fspath[len(self.zip_pre):]
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.zip_pre)
+        )
+
+    def _parts(self, zip_path):
+        # Convert a zipfile subpath into an egg-relative path part list.
+        # pseudo-fs path
+        fspath = self.zip_pre + zip_path
+        if fspath.startswith(self.egg_root + os.sep):
+            return fspath[len(self.egg_root) + 1:].split(os.sep)
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.egg_root)
+        )
+
+    @property
+    def zipinfo(self):
+        return self._zip_manifests.load(self.loader.archive)
+
+    def get_resource_filename(self, manager, resource_name):
+        if not self.egg_name:
+            raise NotImplementedError(
+                "resource_filename() only supported for .egg, not .zip"
+            )
+        # no need to lock for extraction, since we use temp names
+        zip_path = self._resource_to_zip(resource_name)
+        eagers = self._get_eager_resources()
+        if '/'.join(self._parts(zip_path)) in eagers:
+            for name in eagers:
+                self._extract_resource(manager, self._eager_to_zip(name))
+        return self._extract_resource(manager, zip_path)
+
+    @staticmethod
+    def _get_date_and_size(zip_stat):
+        size = zip_stat.file_size
+        # ymdhms+wday, yday, dst
+        date_time = zip_stat.date_time + (0, 0, -1)
+        # 1980 offset already done
+        timestamp = time.mktime(date_time)
+        return timestamp, size
+
+    def _extract_resource(self, manager, zip_path):
+
+        if zip_path in self._index():
+            for name in self._index()[zip_path]:
+                last = self._extract_resource(
+                    manager, os.path.join(zip_path, name)
+                )
+            # return the extracted directory name
+            return os.path.dirname(last)
+
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+
+        if not WRITE_SUPPORT:
+            raise IOError('"os.rename" and "os.unlink" are not supported '
+                          'on this platform')
+        try:
+
+            real_path = manager.get_cache_path(
+                self.egg_name, self._parts(zip_path)
+            )
+
+            if self._is_current(real_path, zip_path):
+                return real_path
+
+            outf, tmpnam = _mkstemp(
+                ".$extract",
+                dir=os.path.dirname(real_path),
+            )
+            os.write(outf, self.loader.get_data(zip_path))
+            os.close(outf)
+            utime(tmpnam, (timestamp, timestamp))
+            manager.postprocess(tmpnam, real_path)
+
+            try:
+                rename(tmpnam, real_path)
+
+            except os.error:
+                if os.path.isfile(real_path):
+                    if self._is_current(real_path, zip_path):
+                        # the file became current since it was checked above,
+                        #  so proceed.
+                        return real_path
+                    # Windows, del old file and retry
+                    elif os.name == 'nt':
+                        unlink(real_path)
+                        rename(tmpnam, real_path)
+                        return real_path
+                raise
+
+        except os.error:
+            # report a user-friendly error
+            manager.extraction_error()
+
+        return real_path
+
+    def _is_current(self, file_path, zip_path):
+        """
+        Return True if the file_path is current for this zip_path
+        """
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+        if not os.path.isfile(file_path):
+            return False
+        stat = os.stat(file_path)
+        if stat.st_size != size or stat.st_mtime != timestamp:
+            return False
+        # check that the contents match
+        zip_contents = self.loader.get_data(zip_path)
+        with open(file_path, 'rb') as f:
+            file_contents = f.read()
+        return zip_contents == file_contents
+
+    def _get_eager_resources(self):
+        if self.eagers is None:
+            eagers = []
+            for name in ('native_libs.txt', 'eager_resources.txt'):
+                if self.has_metadata(name):
+                    eagers.extend(self.get_metadata_lines(name))
+            self.eagers = eagers
+        return self.eagers
+
+    def _index(self):
+        try:
+            return self._dirindex
+        except AttributeError:
+            ind = {}
+            for path in self.zipinfo:
+                parts = path.split(os.sep)
+                while parts:
+                    parent = os.sep.join(parts[:-1])
+                    if parent in ind:
+                        ind[parent].append(parts[-1])
+                        break
+                    else:
+                        ind[parent] = [parts.pop()]
+            self._dirindex = ind
+            return ind
+
+    def _has(self, fspath):
+        zip_path = self._zipinfo_name(fspath)
+        return zip_path in self.zipinfo or zip_path in self._index()
+
+    def _isdir(self, fspath):
+        return self._zipinfo_name(fspath) in self._index()
+
+    def _listdir(self, fspath):
+        return list(self._index().get(self._zipinfo_name(fspath), ()))
+
+    def _eager_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.egg_root, resource_name))
+
+    def _resource_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.module_path, resource_name))
+
+
+register_loader_type(zipimport.zipimporter, ZipProvider)
+
+
+class FileMetadata(EmptyProvider):
+    """Metadata handler for standalone PKG-INFO files
+
+    Usage::
+
+        metadata = FileMetadata("/path/to/PKG-INFO")
+
+    This provider rejects all data and metadata requests except for PKG-INFO,
+    which is treated as existing, and will be the contents of the file at
+    the provided location.
+    """
+
+    def __init__(self, path):
+        self.path = path
+
+    def _get_metadata_path(self, name):
+        return self.path
+
+    def has_metadata(self, name):
+        return name == 'PKG-INFO' and os.path.isfile(self.path)
+
+    def get_metadata(self, name):
+        if name != 'PKG-INFO':
+            raise KeyError("No metadata except PKG-INFO is available")
+
+        with io.open(self.path, encoding='utf-8', errors="replace") as f:
+            metadata = f.read()
+        self._warn_on_replacement(metadata)
+        return metadata
+
+    def _warn_on_replacement(self, metadata):
+        # Python 2.7 compat for: replacement_char = '�'
+        replacement_char = b'\xef\xbf\xbd'.decode('utf-8')
+        if replacement_char in metadata:
+            tmpl = "{self.path} could not be properly decoded in UTF-8"
+            msg = tmpl.format(**locals())
+            warnings.warn(msg)
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+
+class PathMetadata(DefaultProvider):
+    """Metadata provider for egg directories
+
+    Usage::
+
+        # Development eggs:
+
+        egg_info = "/path/to/PackageName.egg-info"
+        base_dir = os.path.dirname(egg_info)
+        metadata = PathMetadata(base_dir, egg_info)
+        dist_name = os.path.splitext(os.path.basename(egg_info))[0]
+        dist = Distribution(basedir, project_name=dist_name, metadata=metadata)
+
+        # Unpacked egg directories:
+
+        egg_path = "/path/to/PackageName-ver-pyver-etc.egg"
+        metadata = PathMetadata(egg_path, os.path.join(egg_path,'EGG-INFO'))
+        dist = Distribution.from_filename(egg_path, metadata=metadata)
+    """
+
+    def __init__(self, path, egg_info):
+        self.module_path = path
+        self.egg_info = egg_info
+
+
+class EggMetadata(ZipProvider):
+    """Metadata provider for .egg files"""
+
+    def __init__(self, importer):
+        """Create a metadata provider from a zipimporter"""
+
+        self.zip_pre = importer.archive + os.sep
+        self.loader = importer
+        if importer.prefix:
+            self.module_path = os.path.join(importer.archive, importer.prefix)
+        else:
+            self.module_path = importer.archive
+        self._setup_prefix()
+
+
+_declare_state('dict', _distribution_finders={})
+
+
+def register_finder(importer_type, distribution_finder):
+    """Register `distribution_finder` to find distributions in sys.path items
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `distribution_finder` is a callable that, passed a path
+    item and the importer instance, yields ``Distribution`` instances found on
+    that path item.  See ``pkg_resources.find_on_path`` for an example."""
+    _distribution_finders[importer_type] = distribution_finder
+
+
+def find_distributions(path_item, only=False):
+    """Yield distributions accessible via `path_item`"""
+    importer = get_importer(path_item)
+    finder = _find_adapter(_distribution_finders, importer)
+    return finder(importer, path_item, only)
+
+
+def find_eggs_in_zip(importer, path_item, only=False):
+    """
+    Find eggs in zip files; possibly multiple nested eggs.
+    """
+    if importer.archive.endswith('.whl'):
+        # wheels are not supported with this finder
+        # they don't have PKG-INFO metadata, and won't ever contain eggs
+        return
+    metadata = EggMetadata(importer)
+    if metadata.has_metadata('PKG-INFO'):
+        yield Distribution.from_filename(path_item, metadata=metadata)
+    if only:
+        # don't yield nested distros
+        return
+    for subitem in metadata.resource_listdir(''):
+        if _is_egg_path(subitem):
+            subpath = os.path.join(path_item, subitem)
+            dists = find_eggs_in_zip(zipimport.zipimporter(subpath), subpath)
+            for dist in dists:
+                yield dist
+        elif subitem.lower().endswith('.dist-info'):
+            subpath = os.path.join(path_item, subitem)
+            submeta = EggMetadata(zipimport.zipimporter(subpath))
+            submeta.egg_info = subpath
+            yield Distribution.from_location(path_item, subitem, submeta)
+
+
+register_finder(zipimport.zipimporter, find_eggs_in_zip)
+
+
+def find_nothing(importer, path_item, only=False):
+    return ()
+
+
+register_finder(object, find_nothing)
+
+
+def _by_version_descending(names):
+    """
+    Given a list of filenames, return them in descending order
+    by version number.
+
+    >>> names = 'bar', 'foo', 'Python-2.7.10.egg', 'Python-2.7.2.egg'
+    >>> _by_version_descending(names)
+    ['Python-2.7.10.egg', 'Python-2.7.2.egg', 'foo', 'bar']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.egg', 'Setuptools-1.2.3b1.egg']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.post1.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.post1.egg', 'Setuptools-1.2.3b1.egg']
+    """
+    def _by_version(name):
+        """
+        Parse each component of the filename
+        """
+        name, ext = os.path.splitext(name)
+        parts = itertools.chain(name.split('-'), [ext])
+        return [packaging.version.parse(part) for part in parts]
+
+    return sorted(names, key=_by_version, reverse=True)
+
+
+def find_on_path(importer, path_item, only=False):
+    """Yield distributions accessible on a sys.path directory"""
+    path_item = _normalize_cached(path_item)
+
+    if _is_unpacked_egg(path_item):
+        yield Distribution.from_filename(
+            path_item, metadata=PathMetadata(
+                path_item, os.path.join(path_item, 'EGG-INFO')
+            )
+        )
+        return
+
+    entries = safe_listdir(path_item)
+
+    # for performance, before sorting by version,
+    # screen entries for only those that will yield
+    # distributions
+    filtered = (
+        entry
+        for entry in entries
+        if dist_factory(path_item, entry, only)
+    )
+
+    # scan for .egg and .egg-info in directory
+    path_item_entries = _by_version_descending(filtered)
+    for entry in path_item_entries:
+        fullpath = os.path.join(path_item, entry)
+        factory = dist_factory(path_item, entry, only)
+        for dist in factory(fullpath):
+            yield dist
+
+
+def dist_factory(path_item, entry, only):
+    """
+    Return a dist_factory for a path_item and entry
+    """
+    lower = entry.lower()
+    is_meta = any(map(lower.endswith, ('.egg-info', '.dist-info')))
+    return (
+        distributions_from_metadata
+        if is_meta else
+        find_distributions
+        if not only and _is_egg_path(entry) else
+        resolve_egg_link
+        if not only and lower.endswith('.egg-link') else
+        NoDists()
+    )
+
+
+class NoDists:
+    """
+    >>> bool(NoDists())
+    False
+
+    >>> list(NoDists()('anything'))
+    []
+    """
+    def __bool__(self):
+        return False
+    if six.PY2:
+        __nonzero__ = __bool__
+
+    def __call__(self, fullpath):
+        return iter(())
+
+
+def safe_listdir(path):
+    """
+    Attempt to list contents of path, but suppress some exceptions.
+    """
+    try:
+        return os.listdir(path)
+    except (PermissionError, NotADirectoryError):
+        pass
+    except OSError as e:
+        # Ignore the directory if does not exist, not a directory or
+        # permission denied
+        ignorable = (
+            e.errno in (errno.ENOTDIR, errno.EACCES, errno.ENOENT)
+            # Python 2 on Windows needs to be handled this way :(
+            or getattr(e, "winerror", None) == 267
+        )
+        if not ignorable:
+            raise
+    return ()
+
+
+def distributions_from_metadata(path):
+    root = os.path.dirname(path)
+    if os.path.isdir(path):
+        if len(os.listdir(path)) == 0:
+            # empty metadata dir; skip
+            return
+        metadata = PathMetadata(root, path)
+    else:
+        metadata = FileMetadata(path)
+    entry = os.path.basename(path)
+    yield Distribution.from_location(
+        root, entry, metadata, precedence=DEVELOP_DIST,
+    )
+
+
+def non_empty_lines(path):
+    """
+    Yield non-empty lines from file at path
+    """
+    with open(path) as f:
+        for line in f:
+            line = line.strip()
+            if line:
+                yield line
+
+
+def resolve_egg_link(path):
+    """
+    Given a path to an .egg-link, resolve distributions
+    present in the referenced path.
+    """
+    referenced_paths = non_empty_lines(path)
+    resolved_paths = (
+        os.path.join(os.path.dirname(path), ref)
+        for ref in referenced_paths
+    )
+    dist_groups = map(find_distributions, resolved_paths)
+    return next(dist_groups, ())
+
+
+register_finder(pkgutil.ImpImporter, find_on_path)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_finder(importlib_machinery.FileFinder, find_on_path)
+
+_declare_state('dict', _namespace_handlers={})
+_declare_state('dict', _namespace_packages={})
+
+
+def register_namespace_handler(importer_type, namespace_handler):
+    """Register `namespace_handler` to declare namespace packages
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `namespace_handler` is a callable like this::
+
+        def namespace_handler(importer, path_entry, moduleName, module):
+            # return a path_entry to use for child packages
+
+    Namespace handlers are only called if the importer object has already
+    agreed that it can handle the relevant path item, and they should only
+    return a subpath if the module __path__ does not already contain an
+    equivalent subpath.  For an example namespace handler, see
+    ``pkg_resources.file_ns_handler``.
+    """
+    _namespace_handlers[importer_type] = namespace_handler
+
+
+def _handle_ns(packageName, path_item):
+    """Ensure that named package includes a subpath of path_item (if needed)"""
+
+    importer = get_importer(path_item)
+    if importer is None:
+        return None
+
+    # capture warnings due to #1111
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore")
+        loader = importer.find_module(packageName)
+
+    if loader is None:
+        return None
+    module = sys.modules.get(packageName)
+    if module is None:
+        module = sys.modules[packageName] = types.ModuleType(packageName)
+        module.__path__ = []
+        _set_parent_ns(packageName)
+    elif not hasattr(module, '__path__'):
+        raise TypeError("Not a package:", packageName)
+    handler = _find_adapter(_namespace_handlers, importer)
+    subpath = handler(importer, path_item, packageName, module)
+    if subpath is not None:
+        path = module.__path__
+        path.append(subpath)
+        loader.load_module(packageName)
+        _rebuild_mod_path(path, packageName, module)
+    return subpath
+
+
+def _rebuild_mod_path(orig_path, package_name, module):
+    """
+    Rebuild module.__path__ ensuring that all entries are ordered
+    corresponding to their sys.path order
+    """
+    sys_path = [_normalize_cached(p) for p in sys.path]
+
+    def safe_sys_path_index(entry):
+        """
+        Workaround for #520 and #513.
+        """
+        try:
+            return sys_path.index(entry)
+        except ValueError:
+            return float('inf')
+
+    def position_in_sys_path(path):
+        """
+        Return the ordinal of the path based on its position in sys.path
+        """
+        path_parts = path.split(os.sep)
+        module_parts = package_name.count('.') + 1
+        parts = path_parts[:-module_parts]
+        return safe_sys_path_index(_normalize_cached(os.sep.join(parts)))
+
+    new_path = sorted(orig_path, key=position_in_sys_path)
+    new_path = [_normalize_cached(p) for p in new_path]
+
+    if isinstance(module.__path__, list):
+        module.__path__[:] = new_path
+    else:
+        module.__path__ = new_path
+
+
+def declare_namespace(packageName):
+    """Declare that package 'packageName' is a namespace package"""
+
+    _imp.acquire_lock()
+    try:
+        if packageName in _namespace_packages:
+            return
+
+        path = sys.path
+        parent, _, _ = packageName.rpartition('.')
+
+        if parent:
+            declare_namespace(parent)
+            if parent not in _namespace_packages:
+                __import__(parent)
+            try:
+                path = sys.modules[parent].__path__
+            except AttributeError:
+                raise TypeError("Not a package:", parent)
+
+        # Track what packages are namespaces, so when new path items are added,
+        # they can be updated
+        _namespace_packages.setdefault(parent or None, []).append(packageName)
+        _namespace_packages.setdefault(packageName, [])
+
+        for path_item in path:
+            # Ensure all the parent's path items are reflected in the child,
+            # if they apply
+            _handle_ns(packageName, path_item)
+
+    finally:
+        _imp.release_lock()
+
+
+def fixup_namespace_packages(path_item, parent=None):
+    """Ensure that previously-declared namespace packages include path_item"""
+    _imp.acquire_lock()
+    try:
+        for package in _namespace_packages.get(parent, ()):
+            subpath = _handle_ns(package, path_item)
+            if subpath:
+                fixup_namespace_packages(subpath, package)
+    finally:
+        _imp.release_lock()
+
+
+def file_ns_handler(importer, path_item, packageName, module):
+    """Compute an ns-package subpath for a filesystem or zipfile importer"""
+
+    subpath = os.path.join(path_item, packageName.split('.')[-1])
+    normalized = _normalize_cached(subpath)
+    for item in module.__path__:
+        if _normalize_cached(item) == normalized:
+            break
+    else:
+        # Only return the path if it's not already there
+        return subpath
+
+
+register_namespace_handler(pkgutil.ImpImporter, file_ns_handler)
+register_namespace_handler(zipimport.zipimporter, file_ns_handler)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_namespace_handler(importlib_machinery.FileFinder, file_ns_handler)
+
+
+def null_ns_handler(importer, path_item, packageName, module):
+    return None
+
+
+register_namespace_handler(object, null_ns_handler)
+
+
+def normalize_path(filename):
+    """Normalize a file/dir name for comparison purposes"""
+    return os.path.normcase(os.path.realpath(os.path.normpath(_cygwin_patch(filename))))
+
+
+def _cygwin_patch(filename):  # pragma: nocover
+    """
+    Contrary to POSIX 2008, on Cygwin, getcwd (3) contains
+    symlink components. Using
+    os.path.abspath() works around this limitation. A fix in os.getcwd()
+    would probably better, in Cygwin even more so, except
+    that this seems to be by design...
+    """
+    return os.path.abspath(filename) if sys.platform == 'cygwin' else filename
+
+
+def _normalize_cached(filename, _cache={}):
+    try:
+        return _cache[filename]
+    except KeyError:
+        _cache[filename] = result = normalize_path(filename)
+        return result
+
+
+def _is_egg_path(path):
+    """
+    Determine if given path appears to be an egg.
+    """
+    return path.lower().endswith('.egg')
+
+
+def _is_unpacked_egg(path):
+    """
+    Determine if given path appears to be an unpacked egg.
+    """
+    return (
+        _is_egg_path(path) and
+        os.path.isfile(os.path.join(path, 'EGG-INFO', 'PKG-INFO'))
+    )
+
+
+def _set_parent_ns(packageName):
+    parts = packageName.split('.')
+    name = parts.pop()
+    if parts:
+        parent = '.'.join(parts)
+        setattr(sys.modules[parent], name, sys.modules[packageName])
+
+
+def yield_lines(strs):
+    """Yield non-empty/non-comment lines of a string or sequence"""
+    if isinstance(strs, six.string_types):
+        for s in strs.splitlines():
+            s = s.strip()
+            # skip blank lines/comments
+            if s and not s.startswith('#'):
+                yield s
+    else:
+        for ss in strs:
+            for s in yield_lines(ss):
+                yield s
+
+
+MODULE = re.compile(r"\w+(\.\w+)*$").match
+EGG_NAME = re.compile(
+    r"""
+    (?P<name>[^-]+) (
+        -(?P<ver>[^-]+) (
+            -py(?P<pyver>[^-]+) (
+                -(?P<plat>.+)
+            )?
+        )?
+    )?
+    """,
+    re.VERBOSE | re.IGNORECASE,
+).match
+
+
+class EntryPoint:
+    """Object representing an advertised importable object"""
+
+    def __init__(self, name, module_name, attrs=(), extras=(), dist=None):
+        if not MODULE(module_name):
+            raise ValueError("Invalid module name", module_name)
+        self.name = name
+        self.module_name = module_name
+        self.attrs = tuple(attrs)
+        self.extras = tuple(extras)
+        self.dist = dist
+
+    def __str__(self):
+        s = "%s = %s" % (self.name, self.module_name)
+        if self.attrs:
+            s += ':' + '.'.join(self.attrs)
+        if self.extras:
+            s += ' [%s]' % ','.join(self.extras)
+        return s
+
+    def __repr__(self):
+        return "EntryPoint.parse(%r)" % str(self)
+
+    def load(self, require=True, *args, **kwargs):
+        """
+        Require packages for this EntryPoint, then resolve it.
+        """
+        if not require or args or kwargs:
+            warnings.warn(
+                "Parameters to load are deprecated.  Call .resolve and "
+                ".require separately.",
+                PkgResourcesDeprecationWarning,
+                stacklevel=2,
+            )
+        if require:
+            self.require(*args, **kwargs)
+        return self.resolve()
+
+    def resolve(self):
+        """
+        Resolve the entry point from its module and attrs.
+        """
+        module = __import__(self.module_name, fromlist=['__name__'], level=0)
+        try:
+            return functools.reduce(getattr, self.attrs, module)
+        except AttributeError as exc:
+            raise ImportError(str(exc))
+
+    def require(self, env=None, installer=None):
+        if self.extras and not self.dist:
+            raise UnknownExtra("Can't require() without a distribution", self)
+
+        # Get the requirements for this entry point with all its extras and
+        # then resolve them. We have to pass `extras` along when resolving so
+        # that the working set knows what extras we want. Otherwise, for
+        # dist-info distributions, the working set will assume that the
+        # requirements for that extra are purely optional and skip over them.
+        reqs = self.dist.requires(self.extras)
+        items = working_set.resolve(reqs, env, installer, extras=self.extras)
+        list(map(working_set.add, items))
+
+    pattern = re.compile(
+        r'\s*'
+        r'(?P<name>.+?)\s*'
+        r'=\s*'
+        r'(?P<module>[\w.]+)\s*'
+        r'(:\s*(?P<attr>[\w.]+))?\s*'
+        r'(?P<extras>\[.*\])?\s*$'
+    )
+
+    @classmethod
+    def parse(cls, src, dist=None):
+        """Parse a single entry point from string `src`
+
+        Entry point syntax follows the form::
+
+            name = some.module:some.attr [extra1, extra2]
+
+        The entry name and module name are required, but the ``:attrs`` and
+        ``[extras]`` parts are optional
+        """
+        m = cls.pattern.match(src)
+        if not m:
+            msg = "EntryPoint must be in 'name=module:attrs [extras]' format"
+            raise ValueError(msg, src)
+        res = m.groupdict()
+        extras = cls._parse_extras(res['extras'])
+        attrs = res['attr'].split('.') if res['attr'] else ()
+        return cls(res['name'], res['module'], attrs, extras, dist)
+
+    @classmethod
+    def _parse_extras(cls, extras_spec):
+        if not extras_spec:
+            return ()
+        req = Requirement.parse('x' + extras_spec)
+        if req.specs:
+            raise ValueError()
+        return req.extras
+
+    @classmethod
+    def parse_group(cls, group, lines, dist=None):
+        """Parse an entry point group"""
+        if not MODULE(group):
+            raise ValueError("Invalid group name", group)
+        this = {}
+        for line in yield_lines(lines):
+            ep = cls.parse(line, dist)
+            if ep.name in this:
+                raise ValueError("Duplicate entry point", group, ep.name)
+            this[ep.name] = ep
+        return this
+
+    @classmethod
+    def parse_map(cls, data, dist=None):
+        """Parse a map of entry point groups"""
+        if isinstance(data, dict):
+            data = data.items()
+        else:
+            data = split_sections(data)
+        maps = {}
+        for group, lines in data:
+            if group is None:
+                if not lines:
+                    continue
+                raise ValueError("Entry points must be listed in groups")
+            group = group.strip()
+            if group in maps:
+                raise ValueError("Duplicate group name", group)
+            maps[group] = cls.parse_group(group, lines, dist)
+        return maps
+
+
+def _remove_md5_fragment(location):
+    if not location:
+        return ''
+    parsed = urllib.parse.urlparse(location)
+    if parsed[-1].startswith('md5='):
+        return urllib.parse.urlunparse(parsed[:-1] + ('',))
+    return location
+
+
+def _version_from_file(lines):
+    """
+    Given an iterable of lines from a Metadata file, return
+    the value of the Version field, if present, or None otherwise.
+    """
+    def is_version_line(line):
+        return line.lower().startswith('version:')
+    version_lines = filter(is_version_line, lines)
+    line = next(iter(version_lines), '')
+    _, _, value = line.partition(':')
+    return safe_version(value.strip()) or None
+
+
+class Distribution:
+    """Wrap an actual or potential sys.path entry w/metadata"""
+    PKG_INFO = 'PKG-INFO'
+
+    def __init__(
+            self, location=None, metadata=None, project_name=None,
+            version=None, py_version=PY_MAJOR, platform=None,
+            precedence=EGG_DIST):
+        self.project_name = safe_name(project_name or 'Unknown')
+        if version is not None:
+            self._version = safe_version(version)
+        self.py_version = py_version
+        self.platform = platform
+        self.location = location
+        self.precedence = precedence
+        self._provider = metadata or empty_provider
+
+    @classmethod
+    def from_location(cls, location, basename, metadata=None, **kw):
+        project_name, version, py_version, platform = [None] * 4
+        basename, ext = os.path.splitext(basename)
+        if ext.lower() in _distributionImpl:
+            cls = _distributionImpl[ext.lower()]
+
+            match = EGG_NAME(basename)
+            if match:
+                project_name, version, py_version, platform = match.group(
+                    'name', 'ver', 'pyver', 'plat'
+                )
+        return cls(
+            location, metadata, project_name=project_name, version=version,
+            py_version=py_version, platform=platform, **kw
+        )._reload_version()
+
+    def _reload_version(self):
+        return self
+
+    @property
+    def hashcmp(self):
+        return (
+            self.parsed_version,
+            self.precedence,
+            self.key,
+            _remove_md5_fragment(self.location),
+            self.py_version or '',
+            self.platform or '',
+        )
+
+    def __hash__(self):
+        return hash(self.hashcmp)
+
+    def __lt__(self, other):
+        return self.hashcmp < other.hashcmp
+
+    def __le__(self, other):
+        return self.hashcmp <= other.hashcmp
+
+    def __gt__(self, other):
+        return self.hashcmp > other.hashcmp
+
+    def __ge__(self, other):
+        return self.hashcmp >= other.hashcmp
+
+    def __eq__(self, other):
+        if not isinstance(other, self.__class__):
+            # It's not a Distribution, so they are not equal
+            return False
+        return self.hashcmp == other.hashcmp
+
+    def __ne__(self, other):
+        return not self == other
+
+    # These properties have to be lazy so that we don't have to load any
+    # metadata until/unless it's actually needed.  (i.e., some distributions
+    # may not know their name or version without loading PKG-INFO)
+
+    @property
+    def key(self):
+        try:
+            return self._key
+        except AttributeError:
+            self._key = key = self.project_name.lower()
+            return key
+
+    @property
+    def parsed_version(self):
+        if not hasattr(self, "_parsed_version"):
+            self._parsed_version = parse_version(self.version)
+
+        return self._parsed_version
+
+    def _warn_legacy_version(self):
+        LV = packaging.version.LegacyVersion
+        is_legacy = isinstance(self._parsed_version, LV)
+        if not is_legacy:
+            return
+
+        # While an empty version is technically a legacy version and
+        # is not a valid PEP 440 version, it's also unlikely to
+        # actually come from someone and instead it is more likely that
+        # it comes from setuptools attempting to parse a filename and
+        # including it in the list. So for that we'll gate this warning
+        # on if the version is anything at all or not.
+        if not self.version:
+            return
+
+        tmpl = textwrap.dedent("""
+            '{project_name} ({version})' is being parsed as a legacy,
+            non PEP 440,
+            version. You may find odd behavior and sort order.
+            In particular it will be sorted as less than 0.0. It
+            is recommended to migrate to PEP 440 compatible
+            versions.
+            """).strip().replace('\n', ' ')
+
+        warnings.warn(tmpl.format(**vars(self)), PEP440Warning)
+
+    @property
+    def version(self):
+        try:
+            return self._version
+        except AttributeError:
+            version = self._get_version()
+            if version is None:
+                path = self._get_metadata_path_for_display(self.PKG_INFO)
+                msg = (
+                    "Missing 'Version:' header and/or {} file at path: {}"
+                ).format(self.PKG_INFO, path)
+                raise ValueError(msg, self)
+
+            return version
+
+    @property
+    def _dep_map(self):
+        """
+        A map of extra to its list of (direct) requirements
+        for this distribution, including the null extra.
+        """
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._filter_extras(self._build_dep_map())
+        return self.__dep_map
+
+    @staticmethod
+    def _filter_extras(dm):
+        """
+        Given a mapping of extras to dependencies, strip off
+        environment markers and filter out any dependencies
+        not matching the markers.
+        """
+        for extra in list(filter(None, dm)):
+            new_extra = extra
+            reqs = dm.pop(extra)
+            new_extra, _, marker = extra.partition(':')
+            fails_marker = marker and (
+                invalid_marker(marker)
+                or not evaluate_marker(marker)
+            )
+            if fails_marker:
+                reqs = []
+            new_extra = safe_extra(new_extra) or None
+
+            dm.setdefault(new_extra, []).extend(reqs)
+        return dm
+
+    def _build_dep_map(self):
+        dm = {}
+        for name in 'requires.txt', 'depends.txt':
+            for extra, reqs in split_sections(self._get_metadata(name)):
+                dm.setdefault(extra, []).extend(parse_requirements(reqs))
+        return dm
+
+    def requires(self, extras=()):
+        """List of Requirements needed for this distro if `extras` are used"""
+        dm = self._dep_map
+        deps = []
+        deps.extend(dm.get(None, ()))
+        for ext in extras:
+            try:
+                deps.extend(dm[safe_extra(ext)])
+            except KeyError:
+                raise UnknownExtra(
+                    "%s has no such extra feature %r" % (self, ext)
+                )
+        return deps
+
+    def _get_metadata_path_for_display(self, name):
+        """
+        Return the path to the given metadata file, if available.
+        """
+        try:
+            # We need to access _get_metadata_path() on the provider object
+            # directly rather than through this class's __getattr__()
+            # since _get_metadata_path() is marked private.
+            path = self._provider._get_metadata_path(name)
+
+        # Handle exceptions e.g. in case the distribution's metadata
+        # provider doesn't support _get_metadata_path().
+        except Exception:
+            return '[could not detect]'
+
+        return path
+
+    def _get_metadata(self, name):
+        if self.has_metadata(name):
+            for line in self.get_metadata_lines(name):
+                yield line
+
+    def _get_version(self):
+        lines = self._get_metadata(self.PKG_INFO)
+        version = _version_from_file(lines)
+
+        return version
+
+    def activate(self, path=None, replace=False):
+        """Ensure distribution is importable on `path` (default=sys.path)"""
+        if path is None:
+            path = sys.path
+        self.insert_on(path, replace=replace)
+        if path is sys.path:
+            fixup_namespace_packages(self.location)
+            for pkg in self._get_metadata('namespace_packages.txt'):
+                if pkg in sys.modules:
+                    declare_namespace(pkg)
+
+    def egg_name(self):
+        """Return what this distribution's standard .egg filename should be"""
+        filename = "%s-%s-py%s" % (
+            to_filename(self.project_name), to_filename(self.version),
+            self.py_version or PY_MAJOR
+        )
+
+        if self.platform:
+            filename += '-' + self.platform
+        return filename
+
+    def __repr__(self):
+        if self.location:
+            return "%s (%s)" % (self, self.location)
+        else:
+            return str(self)
+
+    def __str__(self):
+        try:
+            version = getattr(self, 'version', None)
+        except ValueError:
+            version = None
+        version = version or "[unknown version]"
+        return "%s %s" % (self.project_name, version)
+
+    def __getattr__(self, attr):
+        """Delegate all unrecognized public attributes to .metadata provider"""
+        if attr.startswith('_'):
+            raise AttributeError(attr)
+        return getattr(self._provider, attr)
+
+    def __dir__(self):
+        return list(
+            set(super(Distribution, self).__dir__())
+            | set(
+                attr for attr in self._provider.__dir__()
+                if not attr.startswith('_')
+            )
+        )
+
+    if not hasattr(object, '__dir__'):
+        # python 2.7 not supported
+        del __dir__
+
+    @classmethod
+    def from_filename(cls, filename, metadata=None, **kw):
+        return cls.from_location(
+            _normalize_cached(filename), os.path.basename(filename), metadata,
+            **kw
+        )
+
+    def as_requirement(self):
+        """Return a ``Requirement`` that matches this distribution exactly"""
+        if isinstance(self.parsed_version, packaging.version.Version):
+            spec = "%s==%s" % (self.project_name, self.parsed_version)
+        else:
+            spec = "%s===%s" % (self.project_name, self.parsed_version)
+
+        return Requirement.parse(spec)
+
+    def load_entry_point(self, group, name):
+        """Return the `name` entry point of `group` or raise ImportError"""
+        ep = self.get_entry_info(group, name)
+        if ep is None:
+            raise ImportError("Entry point %r not found" % ((group, name),))
+        return ep.load()
+
+    def get_entry_map(self, group=None):
+        """Return the entry point map for `group`, or the full entry map"""
+        try:
+            ep_map = self._ep_map
+        except AttributeError:
+            ep_map = self._ep_map = EntryPoint.parse_map(
+                self._get_metadata('entry_points.txt'), self
+            )
+        if group is not None:
+            return ep_map.get(group, {})
+        return ep_map
+
+    def get_entry_info(self, group, name):
+        """Return the EntryPoint object for `group`+`name`, or ``None``"""
+        return self.get_entry_map(group).get(name)
+
+    def insert_on(self, path, loc=None, replace=False):
+        """Ensure self.location is on path
+
+        If replace=False (default):
+            - If location is already in path anywhere, do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent.
+              - Else: add to the end of path.
+        If replace=True:
+            - If location is already on path anywhere (not eggs)
+              or higher priority than its parent (eggs)
+              do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent,
+                removing any lower-priority entries.
+              - Else: add it to the front of path.
+        """
+
+        loc = loc or self.location
+        if not loc:
+            return
+
+        nloc = _normalize_cached(loc)
+        bdir = os.path.dirname(nloc)
+        npath = [(p and _normalize_cached(p) or p) for p in path]
+
+        for p, item in enumerate(npath):
+            if item == nloc:
+                if replace:
+                    break
+                else:
+                    # don't modify path (even removing duplicates) if
+                    # found and not replace
+                    return
+            elif item == bdir and self.precedence == EGG_DIST:
+                # if it's an .egg, give it precedence over its directory
+                # UNLESS it's already been added to sys.path and replace=False
+                if (not replace) and nloc in npath[p:]:
+                    return
+                if path is sys.path:
+                    self.check_version_conflict()
+                path.insert(p, loc)
+                npath.insert(p, nloc)
+                break
+        else:
+            if path is sys.path:
+                self.check_version_conflict()
+            if replace:
+                path.insert(0, loc)
+            else:
+                path.append(loc)
+            return
+
+        # p is the spot where we found or inserted loc; now remove duplicates
+        while True:
+            try:
+                np = npath.index(nloc, p + 1)
+            except ValueError:
+                break
+            else:
+                del npath[np], path[np]
+                # ha!
+                p = np
+
+        return
+
+    def check_version_conflict(self):
+        if self.key == 'setuptools':
+            # ignore the inevitable setuptools self-conflicts  :(
+            return
+
+        nsp = dict.fromkeys(self._get_metadata('namespace_packages.txt'))
+        loc = normalize_path(self.location)
+        for modname in self._get_metadata('top_level.txt'):
+            if (modname not in sys.modules or modname in nsp
+                    or modname in _namespace_packages):
+                continue
+            if modname in ('pkg_resources', 'setuptools', 'site'):
+                continue
+            fn = getattr(sys.modules[modname], '__file__', None)
+            if fn and (normalize_path(fn).startswith(loc) or
+                       fn.startswith(self.location)):
+                continue
+            issue_warning(
+                "Module %s was already imported from %s, but %s is being added"
+                " to sys.path" % (modname, fn, self.location),
+            )
+
+    def has_version(self):
+        try:
+            self.version
+        except ValueError:
+            issue_warning("Unbuilt egg for " + repr(self))
+            return False
+        return True
+
+    def clone(self, **kw):
+        """Copy this distribution, substituting in any changed keyword args"""
+        names = 'project_name version py_version platform location precedence'
+        for attr in names.split():
+            kw.setdefault(attr, getattr(self, attr, None))
+        kw.setdefault('metadata', self._provider)
+        return self.__class__(**kw)
+
+    @property
+    def extras(self):
+        return [dep for dep in self._dep_map if dep]
+
+
+class EggInfoDistribution(Distribution):
+    def _reload_version(self):
+        """
+        Packages installed by distutils (e.g. numpy or scipy),
+        which uses an old safe_version, and so
+        their version numbers can get mangled when
+        converted to filenames (e.g., 1.11.0.dev0+2329eae to
+        1.11.0.dev0_2329eae). These distributions will not be
+        parsed properly
+        downstream by Distribution and safe_version, so
+        take an extra step and try to get the version number from
+        the metadata file itself instead of the filename.
+        """
+        md_version = self._get_version()
+        if md_version:
+            self._version = md_version
+        return self
+
+
+class DistInfoDistribution(Distribution):
+    """
+    Wrap an actual or potential sys.path entry
+    w/metadata, .dist-info style.
+    """
+    PKG_INFO = 'METADATA'
+    EQEQ = re.compile(r"([\(,])\s*(\d.*?)\s*([,\)])")
+
+    @property
+    def _parsed_pkg_info(self):
+        """Parse and cache metadata"""
+        try:
+            return self._pkg_info
+        except AttributeError:
+            metadata = self.get_metadata(self.PKG_INFO)
+            self._pkg_info = email.parser.Parser().parsestr(metadata)
+            return self._pkg_info
+
+    @property
+    def _dep_map(self):
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._compute_dependencies()
+            return self.__dep_map
+
+    def _compute_dependencies(self):
+        """Recompute this distribution's dependencies."""
+        dm = self.__dep_map = {None: []}
+
+        reqs = []
+        # Including any condition expressions
+        for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
+            reqs.extend(parse_requirements(req))
+
+        def reqs_for_extra(extra):
+            for req in reqs:
+                if not req.marker or req.marker.evaluate({'extra': extra}):
+                    yield req
+
+        common = frozenset(reqs_for_extra(None))
+        dm[None].extend(common)
+
+        for extra in self._parsed_pkg_info.get_all('Provides-Extra') or []:
+            s_extra = safe_extra(extra.strip())
+            dm[s_extra] = list(frozenset(reqs_for_extra(extra)) - common)
+
+        return dm
+
+
+_distributionImpl = {
+    '.egg': Distribution,
+    '.egg-info': EggInfoDistribution,
+    '.dist-info': DistInfoDistribution,
+}
+
+
+def issue_warning(*args, **kw):
+    level = 1
+    g = globals()
+    try:
+        # find the first stack frame that is *not* code in
+        # the pkg_resources module, to use for the warning
+        while sys._getframe(level).f_globals is g:
+            level += 1
+    except ValueError:
+        pass
+    warnings.warn(stacklevel=level + 1, *args, **kw)
+
+
+class RequirementParseError(ValueError):
+    def __str__(self):
+        return ' '.join(self.args)
+
+
+def parse_requirements(strs):
+    """Yield ``Requirement`` objects for each specification in `strs`
+
+    `strs` must be a string, or a (possibly-nested) iterable thereof.
+    """
+    # create a steppable iterator, so we can handle \-continuations
+    lines = iter(yield_lines(strs))
+
+    for line in lines:
+        # Drop comments -- a hash without a space may be in a URL.
+        if ' #' in line:
+            line = line[:line.find(' #')]
+        # If there is a line continuation, drop it, and append the next line.
+        if line.endswith('\\'):
+            line = line[:-2].strip()
+            try:
+                line += next(lines)
+            except StopIteration:
+                return
+        yield Requirement(line)
+
+
+class Requirement(packaging.requirements.Requirement):
+    def __init__(self, requirement_string):
+        """DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
+        try:
+            super(Requirement, self).__init__(requirement_string)
+        except packaging.requirements.InvalidRequirement as e:
+            raise RequirementParseError(str(e))
+        self.unsafe_name = self.name
+        project_name = safe_name(self.name)
+        self.project_name, self.key = project_name, project_name.lower()
+        self.specs = [
+            (spec.operator, spec.version) for spec in self.specifier]
+        self.extras = tuple(map(safe_extra, self.extras))
+        self.hashCmp = (
+            self.key,
+            self.url,
+            self.specifier,
+            frozenset(self.extras),
+            str(self.marker) if self.marker else None,
+        )
+        self.__hash = hash(self.hashCmp)
+
+    def __eq__(self, other):
+        return (
+            isinstance(other, Requirement) and
+            self.hashCmp == other.hashCmp
+        )
+
+    def __ne__(self, other):
+        return not self == other
+
+    def __contains__(self, item):
+        if isinstance(item, Distribution):
+            if item.key != self.key:
+                return False
+
+            item = item.version
+
+        # Allow prereleases always in order to match the previous behavior of
+        # this method. In the future this should be smarter and follow PEP 440
+        # more accurately.
+        return self.specifier.contains(item, prereleases=True)
+
+    def __hash__(self):
+        return self.__hash
+
+    def __repr__(self):
+        return "Requirement.parse(%r)" % str(self)
+
+    @staticmethod
+    def parse(s):
+        req, = parse_requirements(s)
+        return req
+
+
+def _always_object(classes):
+    """
+    Ensure object appears in the mro even
+    for old-style classes.
+    """
+    if object not in classes:
+        return classes + (object,)
+    return classes
+
+
+def _find_adapter(registry, ob):
+    """Return an adapter factory for `ob` from `registry`"""
+    types = _always_object(inspect.getmro(getattr(ob, '__class__', type(ob))))
+    for t in types:
+        if t in registry:
+            return registry[t]
+
+
+def ensure_directory(path):
+    """Ensure that the parent directory of `path` exists"""
+    dirname = os.path.dirname(path)
+    py31compat.makedirs(dirname, exist_ok=True)
+
+
+def _bypass_ensure_directory(path):
+    """Sandbox-bypassing version of ensure_directory()"""
+    if not WRITE_SUPPORT:
+        raise IOError('"os.mkdir" not supported on this platform.')
+    dirname, filename = split(path)
+    if dirname and filename and not isdir(dirname):
+        _bypass_ensure_directory(dirname)
+        try:
+            mkdir(dirname, 0o755)
+        except FileExistsError:
+            pass
+
+
+def split_sections(s):
+    """Split a string or iterable thereof into (section, content) pairs
+
+    Each ``section`` is a stripped version of the section header ("[section]")
+    and each ``content`` is a list of stripped lines excluding blank lines and
+    comment-only lines.  If there are any such lines before the first section
+    header, they're returned in a first ``section`` of ``None``.
+    """
+    section = None
+    content = []
+    for line in yield_lines(s):
+        if line.startswith("["):
+            if line.endswith("]"):
+                if section or content:
+                    yield section, content
+                section = line[1:-1].strip()
+                content = []
+            else:
+                raise ValueError("Invalid section heading", line)
+        else:
+            content.append(line)
+
+    # wrap up last segment
+    yield section, content
+
+
+def _mkstemp(*args, **kw):
+    old_open = os.open
+    try:
+        # temporarily bypass sandboxing
+        os.open = os_open
+        return tempfile.mkstemp(*args, **kw)
+    finally:
+        # and then put it back
+        os.open = old_open
+
+
+# Silence the PEP440Warning by default, so that end users don't get hit by it
+# randomly just because they use pkg_resources. We want to append the rule
+# because we want earlier uses of filterwarnings to take precedence over this
+# one.
+warnings.filterwarnings("ignore", category=PEP440Warning, append=True)
+
+
+# from jaraco.functools 1.3
+def _call_aside(f, *args, **kwargs):
+    f(*args, **kwargs)
+    return f
+
+
+@_call_aside
+def _initialize(g=globals()):
+    "Set up global resource manager (deliberately not state-saved)"
+    manager = ResourceManager()
+    g['_manager'] = manager
+    g.update(
+        (name, getattr(manager, name))
+        for name in dir(manager)
+        if not name.startswith('_')
+    )
+
+
+@_call_aside
+def _initialize_master_working_set():
+    """
+    Prepare the master working set and make the ``require()``
+    API available.
+
+    This function has explicit effects on the global state
+    of pkg_resources. It is intended to be invoked once at
+    the initialization of this module.
+
+    Invocation by other packages is unsupported and done
+    at their own risk.
+    """
+    working_set = WorkingSet._build_master()
+    _declare_state('object', working_set=working_set)
+
+    require = working_set.require
+    iter_entry_points = working_set.iter_entry_points
+    add_activation_listener = working_set.subscribe
+    run_script = working_set.run_script
+    # backward compatibility
+    run_main = run_script
+    # Activate all distributions already on sys.path with replace=False and
+    # ensure that all distributions added to the working set in the future
+    # (e.g. by calling ``require()``) will get activated as well,
+    # with higher priority (replace=True).
+    tuple(
+        dist.activate(replace=False)
+        for dist in working_set
+    )
+    add_activation_listener(
+        lambda dist: dist.activate(replace=True),
+        existing=False,
+    )
+    working_set.entries = []
+    # match order
+    list(map(working_set.add_entry, sys.path))
+    globals().update(locals())
+
+class PkgResourcesDeprecationWarning(Warning):
+    """
+    Base class for warning about deprecations in ``pkg_resources``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pkg_resources/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pkg_resources/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pkg_resources/__pycache__/py31compat.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pkg_resources/__pycache__/py31compat.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pkg_resources/py31compat.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pkg_resources/py31compat.py
new file mode 100644
index 0000000..a2d3007
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pkg_resources/py31compat.py
@@ -0,0 +1,23 @@
+import os
+import errno
+import sys
+
+from pip._vendor import six
+
+
+def _makedirs_31(path, exist_ok=False):
+    try:
+        os.makedirs(path)
+    except OSError as exc:
+        if not exist_ok or exc.errno != errno.EEXIST:
+            raise
+
+
+# rely on compatibility behavior until mode considerations
+#  and exists_ok considerations are disentangled.
+# See https://github.com/pypa/setuptools/pull/1083#issuecomment-315168663
+needs_makedirs = (
+    six.PY2 or
+    (3, 4) <= sys.version_info < (3, 4, 1)
+)
+makedirs = _makedirs_31 if needs_makedirs else os.makedirs
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/__init__.py
new file mode 100644
index 0000000..e434c25
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/__init__.py
@@ -0,0 +1,177 @@
+# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from __future__ import division, print_function
+
+from collections import deque
+from datetime import timedelta
+from math import ceil
+from sys import stderr
+try:
+    from time import monotonic
+except ImportError:
+    from time import time as monotonic
+
+
+__version__ = '1.5'
+
+HIDE_CURSOR = '\x1b[?25l'
+SHOW_CURSOR = '\x1b[?25h'
+
+
+class Infinite(object):
+    file = stderr
+    sma_window = 10         # Simple Moving Average window
+    check_tty = True
+    hide_cursor = True
+
+    def __init__(self, message='', **kwargs):
+        self.index = 0
+        self.start_ts = monotonic()
+        self.avg = 0
+        self._avg_update_ts = self.start_ts
+        self._ts = self.start_ts
+        self._xput = deque(maxlen=self.sma_window)
+        for key, val in kwargs.items():
+            setattr(self, key, val)
+
+        self._width = 0
+        self.message = message
+
+        if self.file and self.is_tty():
+            if self.hide_cursor:
+                print(HIDE_CURSOR, end='', file=self.file)
+            print(self.message, end='', file=self.file)
+            self.file.flush()
+
+    def __getitem__(self, key):
+        if key.startswith('_'):
+            return None
+        return getattr(self, key, None)
+
+    @property
+    def elapsed(self):
+        return int(monotonic() - self.start_ts)
+
+    @property
+    def elapsed_td(self):
+        return timedelta(seconds=self.elapsed)
+
+    def update_avg(self, n, dt):
+        if n > 0:
+            xput_len = len(self._xput)
+            self._xput.append(dt / n)
+            now = monotonic()
+            # update when we're still filling _xput, then after every second
+            if (xput_len < self.sma_window or
+                    now - self._avg_update_ts > 1):
+                self.avg = sum(self._xput) / len(self._xput)
+                self._avg_update_ts = now
+
+    def update(self):
+        pass
+
+    def start(self):
+        pass
+
+    def clearln(self):
+        if self.file and self.is_tty():
+            print('\r\x1b[K', end='', file=self.file)
+
+    def write(self, s):
+        if self.file and self.is_tty():
+            line = self.message + s.ljust(self._width)
+            print('\r' + line, end='', file=self.file)
+            self._width = max(self._width, len(s))
+            self.file.flush()
+
+    def writeln(self, line):
+        if self.file and self.is_tty():
+            self.clearln()
+            print(line, end='', file=self.file)
+            self.file.flush()
+
+    def finish(self):
+        if self.file and self.is_tty():
+            print(file=self.file)
+            if self.hide_cursor:
+                print(SHOW_CURSOR, end='', file=self.file)
+
+    def is_tty(self):
+        return self.file.isatty() if self.check_tty else True
+
+    def next(self, n=1):
+        now = monotonic()
+        dt = now - self._ts
+        self.update_avg(n, dt)
+        self._ts = now
+        self.index = self.index + n
+        self.update()
+
+    def iter(self, it):
+        with self:
+            for x in it:
+                yield x
+                self.next()
+
+    def __enter__(self):
+        self.start()
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.finish()
+
+
+class Progress(Infinite):
+    def __init__(self, *args, **kwargs):
+        super(Progress, self).__init__(*args, **kwargs)
+        self.max = kwargs.get('max', 100)
+
+    @property
+    def eta(self):
+        return int(ceil(self.avg * self.remaining))
+
+    @property
+    def eta_td(self):
+        return timedelta(seconds=self.eta)
+
+    @property
+    def percent(self):
+        return self.progress * 100
+
+    @property
+    def progress(self):
+        return min(1, self.index / self.max)
+
+    @property
+    def remaining(self):
+        return max(self.max - self.index, 0)
+
+    def start(self):
+        self.update()
+
+    def goto(self, index):
+        incr = index - self.index
+        self.next(incr)
+
+    def iter(self, it):
+        try:
+            self.max = len(it)
+        except TypeError:
+            pass
+
+        with self:
+            for x in it:
+                yield x
+                self.next()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/bar.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/bar.py
new file mode 100644
index 0000000..8819efd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/bar.py
@@ -0,0 +1,91 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from __future__ import unicode_literals
+
+import sys
+
+from . import Progress
+
+
+class Bar(Progress):
+    width = 32
+    suffix = '%(index)d/%(max)d'
+    bar_prefix = ' |'
+    bar_suffix = '| '
+    empty_fill = ' '
+    fill = '#'
+
+    def update(self):
+        filled_length = int(self.width * self.progress)
+        empty_length = self.width - filled_length
+
+        message = self.message % self
+        bar = self.fill * filled_length
+        empty = self.empty_fill * empty_length
+        suffix = self.suffix % self
+        line = ''.join([message, self.bar_prefix, bar, empty, self.bar_suffix,
+                        suffix])
+        self.writeln(line)
+
+
+class ChargingBar(Bar):
+    suffix = '%(percent)d%%'
+    bar_prefix = ' '
+    bar_suffix = ' '
+    empty_fill = '∙'
+    fill = '█'
+
+
+class FillingSquaresBar(ChargingBar):
+    empty_fill = '▢'
+    fill = '▣'
+
+
+class FillingCirclesBar(ChargingBar):
+    empty_fill = '◯'
+    fill = '◉'
+
+
+class IncrementalBar(Bar):
+    if sys.platform.startswith('win'):
+        phases = (u' ', u'▌', u'█')
+    else:
+        phases = (' ', '▏', '▎', '▍', '▌', '▋', '▊', '▉', '█')
+
+    def update(self):
+        nphases = len(self.phases)
+        filled_len = self.width * self.progress
+        nfull = int(filled_len)                      # Number of full chars
+        phase = int((filled_len - nfull) * nphases)  # Phase of last char
+        nempty = self.width - nfull                  # Number of empty chars
+
+        message = self.message % self
+        bar = self.phases[-1] * nfull
+        current = self.phases[phase] if phase > 0 else ''
+        empty = self.empty_fill * max(0, nempty - len(current))
+        suffix = self.suffix % self
+        line = ''.join([message, self.bar_prefix, bar, current, empty,
+                        self.bar_suffix, suffix])
+        self.writeln(line)
+
+
+class PixelBar(IncrementalBar):
+    phases = ('⡀', '⡄', '⡆', '⡇', '⣇', '⣧', '⣷', '⣿')
+
+
+class ShadyBar(IncrementalBar):
+    phases = (' ', '░', '▒', '▓', '█')
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/counter.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/counter.py
new file mode 100644
index 0000000..d955ca4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/counter.py
@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from __future__ import unicode_literals
+from . import Infinite, Progress
+
+
+class Counter(Infinite):
+    def update(self):
+        self.write(str(self.index))
+
+
+class Countdown(Progress):
+    def update(self):
+        self.write(str(self.remaining))
+
+
+class Stack(Progress):
+    phases = (' ', '▁', '▂', '▃', '▄', '▅', '▆', '▇', '█')
+
+    def update(self):
+        nphases = len(self.phases)
+        i = min(nphases - 1, int(self.progress * nphases))
+        self.write(self.phases[i])
+
+
+class Pie(Stack):
+    phases = ('○', '◔', '◑', '◕', '●')
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/spinner.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/spinner.py
new file mode 100644
index 0000000..4e100ca
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/progress/spinner.py
@@ -0,0 +1,43 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2012 Giorgos Verigakis <verigak@gmail.com>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+from __future__ import unicode_literals
+from . import Infinite
+
+
+class Spinner(Infinite):
+    phases = ('-', '\\', '|', '/')
+    hide_cursor = True
+
+    def update(self):
+        i = self.index % len(self.phases)
+        self.write(self.phases[i])
+
+
+class PieSpinner(Spinner):
+    phases = ['◷', '◶', '◵', '◴']
+
+
+class MoonSpinner(Spinner):
+    phases = ['◑', '◒', '◐', '◓']
+
+
+class LineSpinner(Spinner):
+    phases = ['⎺', '⎻', '⎼', '⎽', '⎼', '⎻']
+
+
+class PixelSpinner(Spinner):
+    phases = ['⣾', '⣷', '⣯', '⣟', '⡿', '⢿', '⣻', '⣽']
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pyparsing.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pyparsing.py
new file mode 100644
index 0000000..7ebc7eb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/pyparsing.py
@@ -0,0 +1,7107 @@
+# -*- coding: utf-8 -*-
+# module pyparsing.py
+#
+# Copyright (c) 2003-2019  Paul T. McGuire
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__doc__ = \
+"""
+pyparsing module - Classes and methods to define and execute parsing grammars
+=============================================================================
+
+The pyparsing module is an alternative approach to creating and
+executing simple grammars, vs. the traditional lex/yacc approach, or the
+use of regular expressions.  With pyparsing, you don't need to learn
+a new syntax for defining grammars or matching expressions - the parsing
+module provides a library of classes that you use to construct the
+grammar directly in Python.
+
+Here is a program to parse "Hello, World!" (or any greeting of the form
+``"<salutation>, <addressee>!"``), built up using :class:`Word`,
+:class:`Literal`, and :class:`And` elements
+(the :class:`'+'<ParserElement.__add__>` operators create :class:`And` expressions,
+and the strings are auto-converted to :class:`Literal` expressions)::
+
+    from pip._vendor.pyparsing import Word, alphas
+
+    # define grammar of a greeting
+    greet = Word(alphas) + "," + Word(alphas) + "!"
+
+    hello = "Hello, World!"
+    print (hello, "->", greet.parseString(hello))
+
+The program outputs the following::
+
+    Hello, World! -> ['Hello', ',', 'World', '!']
+
+The Python representation of the grammar is quite readable, owing to the
+self-explanatory class names, and the use of '+', '|' and '^' operators.
+
+The :class:`ParseResults` object returned from
+:class:`ParserElement.parseString` can be
+accessed as a nested list, a dictionary, or an object with named
+attributes.
+
+The pyparsing module handles some of the problems that are typically
+vexing when writing text parsers:
+
+  - extra or missing whitespace (the above program will also handle
+    "Hello,World!", "Hello  ,  World  !", etc.)
+  - quoted strings
+  - embedded comments
+
+
+Getting Started -
+-----------------
+Visit the classes :class:`ParserElement` and :class:`ParseResults` to
+see the base classes that most other pyparsing
+classes inherit from. Use the docstrings for examples of how to:
+
+ - construct literal match expressions from :class:`Literal` and
+   :class:`CaselessLiteral` classes
+ - construct character word-group expressions using the :class:`Word`
+   class
+ - see how to create repetitive expressions using :class:`ZeroOrMore`
+   and :class:`OneOrMore` classes
+ - use :class:`'+'<And>`, :class:`'|'<MatchFirst>`, :class:`'^'<Or>`,
+   and :class:`'&'<Each>` operators to combine simple expressions into
+   more complex ones
+ - associate names with your parsed results using
+   :class:`ParserElement.setResultsName`
+ - access the parsed data, which is returned as a :class:`ParseResults`
+   object
+ - find some helpful expression short-cuts like :class:`delimitedList`
+   and :class:`oneOf`
+ - find more useful common expressions in the :class:`pyparsing_common`
+   namespace class
+"""
+
+__version__ = "2.4.7"
+__versionTime__ = "30 Mar 2020 00:43 UTC"
+__author__ = "Paul McGuire <ptmcg@users.sourceforge.net>"
+
+import string
+from weakref import ref as wkref
+import copy
+import sys
+import warnings
+import re
+import sre_constants
+import collections
+import pprint
+import traceback
+import types
+from datetime import datetime
+from operator import itemgetter
+import itertools
+from functools import wraps
+from contextlib import contextmanager
+
+try:
+    # Python 3
+    from itertools import filterfalse
+except ImportError:
+    from itertools import ifilterfalse as filterfalse
+
+try:
+    from _thread import RLock
+except ImportError:
+    from threading import RLock
+
+try:
+    # Python 3
+    from collections.abc import Iterable
+    from collections.abc import MutableMapping, Mapping
+except ImportError:
+    # Python 2.7
+    from collections import Iterable
+    from collections import MutableMapping, Mapping
+
+try:
+    from collections import OrderedDict as _OrderedDict
+except ImportError:
+    try:
+        from ordereddict import OrderedDict as _OrderedDict
+    except ImportError:
+        _OrderedDict = None
+
+try:
+    from types import SimpleNamespace
+except ImportError:
+    class SimpleNamespace: pass
+
+# version compatibility configuration
+__compat__ = SimpleNamespace()
+__compat__.__doc__ = """
+    A cross-version compatibility configuration for pyparsing features that will be
+    released in a future version. By setting values in this configuration to True,
+    those features can be enabled in prior versions for compatibility development
+    and testing.
+
+     - collect_all_And_tokens - flag to enable fix for Issue #63 that fixes erroneous grouping
+       of results names when an And expression is nested within an Or or MatchFirst; set to
+       True to enable bugfix released in pyparsing 2.3.0, or False to preserve
+       pre-2.3.0 handling of named results
+"""
+__compat__.collect_all_And_tokens = True
+
+__diag__ = SimpleNamespace()
+__diag__.__doc__ = """
+Diagnostic configuration (all default to False)
+     - warn_multiple_tokens_in_named_alternation - flag to enable warnings when a results
+       name is defined on a MatchFirst or Or expression with one or more And subexpressions
+       (only warns if __compat__.collect_all_And_tokens is False)
+     - warn_ungrouped_named_tokens_in_collection - flag to enable warnings when a results
+       name is defined on a containing expression with ungrouped subexpressions that also
+       have results names
+     - warn_name_set_on_empty_Forward - flag to enable warnings whan a Forward is defined
+       with a results name, but has no contents defined
+     - warn_on_multiple_string_args_to_oneof - flag to enable warnings whan oneOf is
+       incorrectly called with multiple str arguments
+     - enable_debug_on_named_expressions - flag to auto-enable debug on all subsequent
+       calls to ParserElement.setName()
+"""
+__diag__.warn_multiple_tokens_in_named_alternation = False
+__diag__.warn_ungrouped_named_tokens_in_collection = False
+__diag__.warn_name_set_on_empty_Forward = False
+__diag__.warn_on_multiple_string_args_to_oneof = False
+__diag__.enable_debug_on_named_expressions = False
+__diag__._all_names = [nm for nm in vars(__diag__) if nm.startswith("enable_") or nm.startswith("warn_")]
+
+def _enable_all_warnings():
+    __diag__.warn_multiple_tokens_in_named_alternation = True
+    __diag__.warn_ungrouped_named_tokens_in_collection = True
+    __diag__.warn_name_set_on_empty_Forward = True
+    __diag__.warn_on_multiple_string_args_to_oneof = True
+__diag__.enable_all_warnings = _enable_all_warnings
+
+
+__all__ = ['__version__', '__versionTime__', '__author__', '__compat__', '__diag__',
+           'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty',
+           'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal',
+           'PrecededBy', 'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or',
+           'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException',
+           'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException',
+           'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter',
+           'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore', 'Char',
+           'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col',
+           'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString',
+           'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums',
+           'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno',
+           'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral',
+           'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables',
+           'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity',
+           'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd',
+           'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute',
+           'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation', 'locatedExpr', 'withClass',
+           'CloseMatch', 'tokenMap', 'pyparsing_common', 'pyparsing_unicode', 'unicode_set',
+           'conditionAsParseAction', 're',
+           ]
+
+system_version = tuple(sys.version_info)[:3]
+PY_3 = system_version[0] == 3
+if PY_3:
+    _MAX_INT = sys.maxsize
+    basestring = str
+    unichr = chr
+    unicode = str
+    _ustr = str
+
+    # build list of single arg builtins, that can be used as parse actions
+    singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max]
+
+else:
+    _MAX_INT = sys.maxint
+    range = xrange
+
+    def _ustr(obj):
+        """Drop-in replacement for str(obj) that tries to be Unicode
+        friendly. It first tries str(obj). If that fails with
+        a UnicodeEncodeError, then it tries unicode(obj). It then
+        < returns the unicode object | encodes it with the default
+        encoding | ... >.
+        """
+        if isinstance(obj, unicode):
+            return obj
+
+        try:
+            # If this works, then _ustr(obj) has the same behaviour as str(obj), so
+            # it won't break any existing code.
+            return str(obj)
+
+        except UnicodeEncodeError:
+            # Else encode it
+            ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace')
+            xmlcharref = Regex(r'&#\d+;')
+            xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:])
+            return xmlcharref.transformString(ret)
+
+    # build list of single arg builtins, tolerant of Python version, that can be used as parse actions
+    singleArgBuiltins = []
+    import __builtin__
+
+    for fname in "sum len sorted reversed list tuple set any all min max".split():
+        try:
+            singleArgBuiltins.append(getattr(__builtin__, fname))
+        except AttributeError:
+            continue
+
+_generatorType = type((y for y in range(1)))
+
+def _xml_escape(data):
+    """Escape &, <, >, ", ', etc. in a string of data."""
+
+    # ampersand must be replaced first
+    from_symbols = '&><"\''
+    to_symbols = ('&' + s + ';' for s in "amp gt lt quot apos".split())
+    for from_, to_ in zip(from_symbols, to_symbols):
+        data = data.replace(from_, to_)
+    return data
+
+alphas = string.ascii_uppercase + string.ascii_lowercase
+nums = "0123456789"
+hexnums = nums + "ABCDEFabcdef"
+alphanums = alphas + nums
+_bslash = chr(92)
+printables = "".join(c for c in string.printable if c not in string.whitespace)
+
+
+def conditionAsParseAction(fn, message=None, fatal=False):
+    msg = message if message is not None else "failed user-defined condition"
+    exc_type = ParseFatalException if fatal else ParseException
+    fn = _trim_arity(fn)
+
+    @wraps(fn)
+    def pa(s, l, t):
+        if not bool(fn(s, l, t)):
+            raise exc_type(s, l, msg)
+
+    return pa
+
+class ParseBaseException(Exception):
+    """base exception class for all parsing runtime exceptions"""
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__(self, pstr, loc=0, msg=None, elem=None):
+        self.loc = loc
+        if msg is None:
+            self.msg = pstr
+            self.pstr = ""
+        else:
+            self.msg = msg
+            self.pstr = pstr
+        self.parserElement = elem
+        self.args = (pstr, loc, msg)
+
+    @classmethod
+    def _from_exception(cls, pe):
+        """
+        internal factory method to simplify creating one type of ParseException
+        from another - avoids having __init__ signature conflicts among subclasses
+        """
+        return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement)
+
+    def __getattr__(self, aname):
+        """supported attributes by name are:
+           - lineno - returns the line number of the exception text
+           - col - returns the column number of the exception text
+           - line - returns the line containing the exception text
+        """
+        if aname == "lineno":
+            return lineno(self.loc, self.pstr)
+        elif aname in ("col", "column"):
+            return col(self.loc, self.pstr)
+        elif aname == "line":
+            return line(self.loc, self.pstr)
+        else:
+            raise AttributeError(aname)
+
+    def __str__(self):
+        if self.pstr:
+            if self.loc >= len(self.pstr):
+                foundstr = ', found end of text'
+            else:
+                foundstr = (', found %r' % self.pstr[self.loc:self.loc + 1]).replace(r'\\', '\\')
+        else:
+            foundstr = ''
+        return ("%s%s  (at char %d), (line:%d, col:%d)" %
+                   (self.msg, foundstr, self.loc, self.lineno, self.column))
+    def __repr__(self):
+        return _ustr(self)
+    def markInputline(self, markerString=">!<"):
+        """Extracts the exception line from the input string, and marks
+           the location of the exception with a special symbol.
+        """
+        line_str = self.line
+        line_column = self.column - 1
+        if markerString:
+            line_str = "".join((line_str[:line_column],
+                                markerString, line_str[line_column:]))
+        return line_str.strip()
+    def __dir__(self):
+        return "lineno col line".split() + dir(type(self))
+
+class ParseException(ParseBaseException):
+    """
+    Exception thrown when parse expressions don't match class;
+    supported attributes by name are:
+    - lineno - returns the line number of the exception text
+    - col - returns the column number of the exception text
+    - line - returns the line containing the exception text
+
+    Example::
+
+        try:
+            Word(nums).setName("integer").parseString("ABC")
+        except ParseException as pe:
+            print(pe)
+            print("column: {}".format(pe.col))
+
+    prints::
+
+       Expected integer (at char 0), (line:1, col:1)
+        column: 1
+
+    """
+
+    @staticmethod
+    def explain(exc, depth=16):
+        """
+        Method to take an exception and translate the Python internal traceback into a list
+        of the pyparsing expressions that caused the exception to be raised.
+
+        Parameters:
+
+         - exc - exception raised during parsing (need not be a ParseException, in support
+           of Python exceptions that might be raised in a parse action)
+         - depth (default=16) - number of levels back in the stack trace to list expression
+           and function names; if None, the full stack trace names will be listed; if 0, only
+           the failing input line, marker, and exception string will be shown
+
+        Returns a multi-line string listing the ParserElements and/or function names in the
+        exception's stack trace.
+
+        Note: the diagnostic output will include string representations of the expressions
+        that failed to parse. These representations will be more helpful if you use `setName` to
+        give identifiable names to your expressions. Otherwise they will use the default string
+        forms, which may be cryptic to read.
+
+        explain() is only supported under Python 3.
+        """
+        import inspect
+
+        if depth is None:
+            depth = sys.getrecursionlimit()
+        ret = []
+        if isinstance(exc, ParseBaseException):
+            ret.append(exc.line)
+            ret.append(' ' * (exc.col - 1) + '^')
+        ret.append("{0}: {1}".format(type(exc).__name__, exc))
+
+        if depth > 0:
+            callers = inspect.getinnerframes(exc.__traceback__, context=depth)
+            seen = set()
+            for i, ff in enumerate(callers[-depth:]):
+                frm = ff[0]
+
+                f_self = frm.f_locals.get('self', None)
+                if isinstance(f_self, ParserElement):
+                    if frm.f_code.co_name not in ('parseImpl', '_parseNoCache'):
+                        continue
+                    if f_self in seen:
+                        continue
+                    seen.add(f_self)
+
+                    self_type = type(f_self)
+                    ret.append("{0}.{1} - {2}".format(self_type.__module__,
+                                                      self_type.__name__,
+                                                      f_self))
+                elif f_self is not None:
+                    self_type = type(f_self)
+                    ret.append("{0}.{1}".format(self_type.__module__,
+                                                self_type.__name__))
+                else:
+                    code = frm.f_code
+                    if code.co_name in ('wrapper', '<module>'):
+                        continue
+
+                    ret.append("{0}".format(code.co_name))
+
+                depth -= 1
+                if not depth:
+                    break
+
+        return '\n'.join(ret)
+
+
+class ParseFatalException(ParseBaseException):
+    """user-throwable exception thrown when inconsistent parse content
+       is found; stops all parsing immediately"""
+    pass
+
+class ParseSyntaxException(ParseFatalException):
+    """just like :class:`ParseFatalException`, but thrown internally
+    when an :class:`ErrorStop<And._ErrorStop>` ('-' operator) indicates
+    that parsing is to stop immediately because an unbacktrackable
+    syntax error has been found.
+    """
+    pass
+
+#~ class ReparseException(ParseBaseException):
+    #~ """Experimental class - parse actions can raise this exception to cause
+       #~ pyparsing to reparse the input string:
+        #~ - with a modified input string, and/or
+        #~ - with a modified start location
+       #~ Set the values of the ReparseException in the constructor, and raise the
+       #~ exception in a parse action to cause pyparsing to use the new string/location.
+       #~ Setting the values as None causes no change to be made.
+       #~ """
+    #~ def __init_( self, newstring, restartLoc ):
+        #~ self.newParseText = newstring
+        #~ self.reparseLoc = restartLoc
+
+class RecursiveGrammarException(Exception):
+    """exception thrown by :class:`ParserElement.validate` if the
+    grammar could be improperly recursive
+    """
+    def __init__(self, parseElementList):
+        self.parseElementTrace = parseElementList
+
+    def __str__(self):
+        return "RecursiveGrammarException: %s" % self.parseElementTrace
+
+class _ParseResultsWithOffset(object):
+    def __init__(self, p1, p2):
+        self.tup = (p1, p2)
+    def __getitem__(self, i):
+        return self.tup[i]
+    def __repr__(self):
+        return repr(self.tup[0])
+    def setOffset(self, i):
+        self.tup = (self.tup[0], i)
+
+class ParseResults(object):
+    """Structured parse results, to provide multiple means of access to
+    the parsed data:
+
+       - as a list (``len(results)``)
+       - by list index (``results[0], results[1]``, etc.)
+       - by attribute (``results.<resultsName>`` - see :class:`ParserElement.setResultsName`)
+
+    Example::
+
+        integer = Word(nums)
+        date_str = (integer.setResultsName("year") + '/'
+                        + integer.setResultsName("month") + '/'
+                        + integer.setResultsName("day"))
+        # equivalent form:
+        # date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+        # parseString returns a ParseResults object
+        result = date_str.parseString("1999/12/31")
+
+        def test(s, fn=repr):
+            print("%s -> %s" % (s, fn(eval(s))))
+        test("list(result)")
+        test("result[0]")
+        test("result['month']")
+        test("result.day")
+        test("'month' in result")
+        test("'minutes' in result")
+        test("result.dump()", str)
+
+    prints::
+
+        list(result) -> ['1999', '/', '12', '/', '31']
+        result[0] -> '1999'
+        result['month'] -> '12'
+        result.day -> '31'
+        'month' in result -> True
+        'minutes' in result -> False
+        result.dump() -> ['1999', '/', '12', '/', '31']
+        - day: 31
+        - month: 12
+        - year: 1999
+    """
+    def __new__(cls, toklist=None, name=None, asList=True, modal=True):
+        if isinstance(toklist, cls):
+            return toklist
+        retobj = object.__new__(cls)
+        retobj.__doinit = True
+        return retobj
+
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__(self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance):
+        if self.__doinit:
+            self.__doinit = False
+            self.__name = None
+            self.__parent = None
+            self.__accumNames = {}
+            self.__asList = asList
+            self.__modal = modal
+            if toklist is None:
+                toklist = []
+            if isinstance(toklist, list):
+                self.__toklist = toklist[:]
+            elif isinstance(toklist, _generatorType):
+                self.__toklist = list(toklist)
+            else:
+                self.__toklist = [toklist]
+            self.__tokdict = dict()
+
+        if name is not None and name:
+            if not modal:
+                self.__accumNames[name] = 0
+            if isinstance(name, int):
+                name = _ustr(name)  # will always return a str, but use _ustr for consistency
+            self.__name = name
+            if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None, '', [])):
+                if isinstance(toklist, basestring):
+                    toklist = [toklist]
+                if asList:
+                    if isinstance(toklist, ParseResults):
+                        self[name] = _ParseResultsWithOffset(ParseResults(toklist.__toklist), 0)
+                    else:
+                        self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]), 0)
+                    self[name].__name = name
+                else:
+                    try:
+                        self[name] = toklist[0]
+                    except (KeyError, TypeError, IndexError):
+                        self[name] = toklist
+
+    def __getitem__(self, i):
+        if isinstance(i, (int, slice)):
+            return self.__toklist[i]
+        else:
+            if i not in self.__accumNames:
+                return self.__tokdict[i][-1][0]
+            else:
+                return ParseResults([v[0] for v in self.__tokdict[i]])
+
+    def __setitem__(self, k, v, isinstance=isinstance):
+        if isinstance(v, _ParseResultsWithOffset):
+            self.__tokdict[k] = self.__tokdict.get(k, list()) + [v]
+            sub = v[0]
+        elif isinstance(k, (int, slice)):
+            self.__toklist[k] = v
+            sub = v
+        else:
+            self.__tokdict[k] = self.__tokdict.get(k, list()) + [_ParseResultsWithOffset(v, 0)]
+            sub = v
+        if isinstance(sub, ParseResults):
+            sub.__parent = wkref(self)
+
+    def __delitem__(self, i):
+        if isinstance(i, (int, slice)):
+            mylen = len(self.__toklist)
+            del self.__toklist[i]
+
+            # convert int to slice
+            if isinstance(i, int):
+                if i < 0:
+                    i += mylen
+                i = slice(i, i + 1)
+            # get removed indices
+            removed = list(range(*i.indices(mylen)))
+            removed.reverse()
+            # fixup indices in token dictionary
+            for name, occurrences in self.__tokdict.items():
+                for j in removed:
+                    for k, (value, position) in enumerate(occurrences):
+                        occurrences[k] = _ParseResultsWithOffset(value, position - (position > j))
+        else:
+            del self.__tokdict[i]
+
+    def __contains__(self, k):
+        return k in self.__tokdict
+
+    def __len__(self):
+        return len(self.__toklist)
+
+    def __bool__(self):
+        return (not not self.__toklist)
+    __nonzero__ = __bool__
+
+    def __iter__(self):
+        return iter(self.__toklist)
+
+    def __reversed__(self):
+        return iter(self.__toklist[::-1])
+
+    def _iterkeys(self):
+        if hasattr(self.__tokdict, "iterkeys"):
+            return self.__tokdict.iterkeys()
+        else:
+            return iter(self.__tokdict)
+
+    def _itervalues(self):
+        return (self[k] for k in self._iterkeys())
+
+    def _iteritems(self):
+        return ((k, self[k]) for k in self._iterkeys())
+
+    if PY_3:
+        keys = _iterkeys
+        """Returns an iterator of all named result keys."""
+
+        values = _itervalues
+        """Returns an iterator of all named result values."""
+
+        items = _iteritems
+        """Returns an iterator of all named result key-value tuples."""
+
+    else:
+        iterkeys = _iterkeys
+        """Returns an iterator of all named result keys (Python 2.x only)."""
+
+        itervalues = _itervalues
+        """Returns an iterator of all named result values (Python 2.x only)."""
+
+        iteritems = _iteritems
+        """Returns an iterator of all named result key-value tuples (Python 2.x only)."""
+
+        def keys(self):
+            """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iterkeys())
+
+        def values(self):
+            """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.itervalues())
+
+        def items(self):
+            """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iteritems())
+
+    def haskeys(self):
+        """Since keys() returns an iterator, this method is helpful in bypassing
+           code that looks for the existence of any defined results names."""
+        return bool(self.__tokdict)
+
+    def pop(self, *args, **kwargs):
+        """
+        Removes and returns item at specified index (default= ``last``).
+        Supports both ``list`` and ``dict`` semantics for ``pop()``. If
+        passed no argument or an integer argument, it will use ``list``
+        semantics and pop tokens from the list of parsed tokens. If passed
+        a non-integer argument (most likely a string), it will use ``dict``
+        semantics and pop the corresponding value from any defined results
+        names. A second default return value argument is supported, just as in
+        ``dict.pop()``.
+
+        Example::
+
+            def remove_first(tokens):
+                tokens.pop(0)
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+            print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321']
+
+            label = Word(alphas)
+            patt = label("LABEL") + OneOrMore(Word(nums))
+            print(patt.parseString("AAB 123 321").dump())
+
+            # Use pop() in a parse action to remove named result (note that corresponding value is not
+            # removed from list form of results)
+            def remove_LABEL(tokens):
+                tokens.pop("LABEL")
+                return tokens
+            patt.addParseAction(remove_LABEL)
+            print(patt.parseString("AAB 123 321").dump())
+
+        prints::
+
+            ['AAB', '123', '321']
+            - LABEL: AAB
+
+            ['AAB', '123', '321']
+        """
+        if not args:
+            args = [-1]
+        for k, v in kwargs.items():
+            if k == 'default':
+                args = (args[0], v)
+            else:
+                raise TypeError("pop() got an unexpected keyword argument '%s'" % k)
+        if (isinstance(args[0], int)
+                or len(args) == 1
+                or args[0] in self):
+            index = args[0]
+            ret = self[index]
+            del self[index]
+            return ret
+        else:
+            defaultvalue = args[1]
+            return defaultvalue
+
+    def get(self, key, defaultValue=None):
+        """
+        Returns named result matching the given key, or if there is no
+        such name, then returns the given ``defaultValue`` or ``None`` if no
+        ``defaultValue`` is specified.
+
+        Similar to ``dict.get()``.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            result = date_str.parseString("1999/12/31")
+            print(result.get("year")) # -> '1999'
+            print(result.get("hour", "not specified")) # -> 'not specified'
+            print(result.get("hour")) # -> None
+        """
+        if key in self:
+            return self[key]
+        else:
+            return defaultValue
+
+    def insert(self, index, insStr):
+        """
+        Inserts new element at location index in the list of parsed tokens.
+
+        Similar to ``list.insert()``.
+
+        Example::
+
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+
+            # use a parse action to insert the parse location in the front of the parsed results
+            def insert_locn(locn, tokens):
+                tokens.insert(0, locn)
+            print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321']
+        """
+        self.__toklist.insert(index, insStr)
+        # fixup indices in token dictionary
+        for name, occurrences in self.__tokdict.items():
+            for k, (value, position) in enumerate(occurrences):
+                occurrences[k] = _ParseResultsWithOffset(value, position + (position > index))
+
+    def append(self, item):
+        """
+        Add single element to end of ParseResults list of elements.
+
+        Example::
+
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+
+            # use a parse action to compute the sum of the parsed integers, and add it to the end
+            def append_sum(tokens):
+                tokens.append(sum(map(int, tokens)))
+            print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444]
+        """
+        self.__toklist.append(item)
+
+    def extend(self, itemseq):
+        """
+        Add sequence of elements to end of ParseResults list of elements.
+
+        Example::
+
+            patt = OneOrMore(Word(alphas))
+
+            # use a parse action to append the reverse of the matched strings, to make a palindrome
+            def make_palindrome(tokens):
+                tokens.extend(reversed([t[::-1] for t in tokens]))
+                return ''.join(tokens)
+            print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'
+        """
+        if isinstance(itemseq, ParseResults):
+            self.__iadd__(itemseq)
+        else:
+            self.__toklist.extend(itemseq)
+
+    def clear(self):
+        """
+        Clear all elements and results names.
+        """
+        del self.__toklist[:]
+        self.__tokdict.clear()
+
+    def __getattr__(self, name):
+        try:
+            return self[name]
+        except KeyError:
+            return ""
+
+    def __add__(self, other):
+        ret = self.copy()
+        ret += other
+        return ret
+
+    def __iadd__(self, other):
+        if other.__tokdict:
+            offset = len(self.__toklist)
+            addoffset = lambda a: offset if a < 0 else a + offset
+            otheritems = other.__tokdict.items()
+            otherdictitems = [(k, _ParseResultsWithOffset(v[0], addoffset(v[1])))
+                              for k, vlist in otheritems for v in vlist]
+            for k, v in otherdictitems:
+                self[k] = v
+                if isinstance(v[0], ParseResults):
+                    v[0].__parent = wkref(self)
+
+        self.__toklist += other.__toklist
+        self.__accumNames.update(other.__accumNames)
+        return self
+
+    def __radd__(self, other):
+        if isinstance(other, int) and other == 0:
+            # useful for merging many ParseResults using sum() builtin
+            return self.copy()
+        else:
+            # this may raise a TypeError - so be it
+            return other + self
+
+    def __repr__(self):
+        return "(%s, %s)" % (repr(self.__toklist), repr(self.__tokdict))
+
+    def __str__(self):
+        return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']'
+
+    def _asStringList(self, sep=''):
+        out = []
+        for item in self.__toklist:
+            if out and sep:
+                out.append(sep)
+            if isinstance(item, ParseResults):
+                out += item._asStringList()
+            else:
+                out.append(_ustr(item))
+        return out
+
+    def asList(self):
+        """
+        Returns the parse results as a nested list of matching tokens, all converted to strings.
+
+        Example::
+
+            patt = OneOrMore(Word(alphas))
+            result = patt.parseString("sldkj lsdkj sldkj")
+            # even though the result prints in string-like form, it is actually a pyparsing ParseResults
+            print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']
+
+            # Use asList() to create an actual list
+            result_list = result.asList()
+            print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']
+        """
+        return [res.asList() if isinstance(res, ParseResults) else res for res in self.__toklist]
+
+    def asDict(self):
+        """
+        Returns the named parse results as a nested dictionary.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            result = date_str.parseString('12/31/1999')
+            print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})
+
+            result_dict = result.asDict()
+            print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}
+
+            # even though a ParseResults supports dict-like access, sometime you just need to have a dict
+            import json
+            print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable
+            print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"}
+        """
+        if PY_3:
+            item_fn = self.items
+        else:
+            item_fn = self.iteritems
+
+        def toItem(obj):
+            if isinstance(obj, ParseResults):
+                if obj.haskeys():
+                    return obj.asDict()
+                else:
+                    return [toItem(v) for v in obj]
+            else:
+                return obj
+
+        return dict((k, toItem(v)) for k, v in item_fn())
+
+    def copy(self):
+        """
+        Returns a new copy of a :class:`ParseResults` object.
+        """
+        ret = ParseResults(self.__toklist)
+        ret.__tokdict = dict(self.__tokdict.items())
+        ret.__parent = self.__parent
+        ret.__accumNames.update(self.__accumNames)
+        ret.__name = self.__name
+        return ret
+
+    def asXML(self, doctag=None, namedItemsOnly=False, indent="", formatted=True):
+        """
+        (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names.
+        """
+        nl = "\n"
+        out = []
+        namedItems = dict((v[1], k) for (k, vlist) in self.__tokdict.items()
+                          for v in vlist)
+        nextLevelIndent = indent + "  "
+
+        # collapse out indents if formatting is not desired
+        if not formatted:
+            indent = ""
+            nextLevelIndent = ""
+            nl = ""
+
+        selfTag = None
+        if doctag is not None:
+            selfTag = doctag
+        else:
+            if self.__name:
+                selfTag = self.__name
+
+        if not selfTag:
+            if namedItemsOnly:
+                return ""
+            else:
+                selfTag = "ITEM"
+
+        out += [nl, indent, "<", selfTag, ">"]
+
+        for i, res in enumerate(self.__toklist):
+            if isinstance(res, ParseResults):
+                if i in namedItems:
+                    out += [res.asXML(namedItems[i],
+                                      namedItemsOnly and doctag is None,
+                                      nextLevelIndent,
+                                      formatted)]
+                else:
+                    out += [res.asXML(None,
+                                      namedItemsOnly and doctag is None,
+                                      nextLevelIndent,
+                                      formatted)]
+            else:
+                # individual token, see if there is a name for it
+                resTag = None
+                if i in namedItems:
+                    resTag = namedItems[i]
+                if not resTag:
+                    if namedItemsOnly:
+                        continue
+                    else:
+                        resTag = "ITEM"
+                xmlBodyText = _xml_escape(_ustr(res))
+                out += [nl, nextLevelIndent, "<", resTag, ">",
+                        xmlBodyText,
+                                                "</", resTag, ">"]
+
+        out += [nl, indent, "</", selfTag, ">"]
+        return "".join(out)
+
+    def __lookup(self, sub):
+        for k, vlist in self.__tokdict.items():
+            for v, loc in vlist:
+                if sub is v:
+                    return k
+        return None
+
+    def getName(self):
+        r"""
+        Returns the results name for this token expression. Useful when several
+        different expressions might match at a particular location.
+
+        Example::
+
+            integer = Word(nums)
+            ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
+            house_number_expr = Suppress('#') + Word(nums, alphanums)
+            user_data = (Group(house_number_expr)("house_number")
+                        | Group(ssn_expr)("ssn")
+                        | Group(integer)("age"))
+            user_info = OneOrMore(user_data)
+
+            result = user_info.parseString("22 111-22-3333 #221B")
+            for item in result:
+                print(item.getName(), ':', item[0])
+
+        prints::
+
+            age : 22
+            ssn : 111-22-3333
+            house_number : 221B
+        """
+        if self.__name:
+            return self.__name
+        elif self.__parent:
+            par = self.__parent()
+            if par:
+                return par.__lookup(self)
+            else:
+                return None
+        elif (len(self) == 1
+              and len(self.__tokdict) == 1
+              and next(iter(self.__tokdict.values()))[0][1] in (0, -1)):
+            return next(iter(self.__tokdict.keys()))
+        else:
+            return None
+
+    def dump(self, indent='', full=True, include_list=True, _depth=0):
+        """
+        Diagnostic method for listing out the contents of
+        a :class:`ParseResults`. Accepts an optional ``indent`` argument so
+        that this string can be embedded in a nested display of other data.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            result = date_str.parseString('12/31/1999')
+            print(result.dump())
+
+        prints::
+
+            ['12', '/', '31', '/', '1999']
+            - day: 1999
+            - month: 31
+            - year: 12
+        """
+        out = []
+        NL = '\n'
+        if include_list:
+            out.append(indent + _ustr(self.asList()))
+        else:
+            out.append('')
+
+        if full:
+            if self.haskeys():
+                items = sorted((str(k), v) for k, v in self.items())
+                for k, v in items:
+                    if out:
+                        out.append(NL)
+                    out.append("%s%s- %s: " % (indent, ('  ' * _depth), k))
+                    if isinstance(v, ParseResults):
+                        if v:
+                            out.append(v.dump(indent=indent, full=full, include_list=include_list, _depth=_depth + 1))
+                        else:
+                            out.append(_ustr(v))
+                    else:
+                        out.append(repr(v))
+            elif any(isinstance(vv, ParseResults) for vv in self):
+                v = self
+                for i, vv in enumerate(v):
+                    if isinstance(vv, ParseResults):
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,
+                                                            ('  ' * (_depth)),
+                                                            i,
+                                                            indent,
+                                                            ('  ' * (_depth + 1)),
+                                                            vv.dump(indent=indent,
+                                                                    full=full,
+                                                                    include_list=include_list,
+                                                                    _depth=_depth + 1)))
+                    else:
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,
+                                                            ('  ' * (_depth)),
+                                                            i,
+                                                            indent,
+                                                            ('  ' * (_depth + 1)),
+                                                            _ustr(vv)))
+
+        return "".join(out)
+
+    def pprint(self, *args, **kwargs):
+        """
+        Pretty-printer for parsed results as a list, using the
+        `pprint <https://docs.python.org/3/library/pprint.html>`_ module.
+        Accepts additional positional or keyword args as defined for
+        `pprint.pprint <https://docs.python.org/3/library/pprint.html#pprint.pprint>`_ .
+
+        Example::
+
+            ident = Word(alphas, alphanums)
+            num = Word(nums)
+            func = Forward()
+            term = ident | num | Group('(' + func + ')')
+            func <<= ident + Group(Optional(delimitedList(term)))
+            result = func.parseString("fna a,b,(fnb c,d,200),100")
+            result.pprint(width=40)
+
+        prints::
+
+            ['fna',
+             ['a',
+              'b',
+              ['(', 'fnb', ['c', 'd', '200'], ')'],
+              '100']]
+        """
+        pprint.pprint(self.asList(), *args, **kwargs)
+
+    # add support for pickle protocol
+    def __getstate__(self):
+        return (self.__toklist,
+                (self.__tokdict.copy(),
+                 self.__parent is not None and self.__parent() or None,
+                 self.__accumNames,
+                 self.__name))
+
+    def __setstate__(self, state):
+        self.__toklist = state[0]
+        self.__tokdict, par, inAccumNames, self.__name = state[1]
+        self.__accumNames = {}
+        self.__accumNames.update(inAccumNames)
+        if par is not None:
+            self.__parent = wkref(par)
+        else:
+            self.__parent = None
+
+    def __getnewargs__(self):
+        return self.__toklist, self.__name, self.__asList, self.__modal
+
+    def __dir__(self):
+        return dir(type(self)) + list(self.keys())
+
+    @classmethod
+    def from_dict(cls, other, name=None):
+        """
+        Helper classmethod to construct a ParseResults from a dict, preserving the
+        name-value relations as results names. If an optional 'name' argument is
+        given, a nested ParseResults will be returned
+        """
+        def is_iterable(obj):
+            try:
+                iter(obj)
+            except Exception:
+                return False
+            else:
+                if PY_3:
+                    return not isinstance(obj, (str, bytes))
+                else:
+                    return not isinstance(obj, basestring)
+
+        ret = cls([])
+        for k, v in other.items():
+            if isinstance(v, Mapping):
+                ret += cls.from_dict(v, name=k)
+            else:
+                ret += cls([v], name=k, asList=is_iterable(v))
+        if name is not None:
+            ret = cls([ret], name=name)
+        return ret
+
+MutableMapping.register(ParseResults)
+
+def col (loc, strg):
+    """Returns current column within a string, counting newlines as line separators.
+   The first column is number 1.
+
+   Note: the default parsing behavior is to expand tabs in the input string
+   before starting the parsing process.  See
+   :class:`ParserElement.parseString` for more
+   information on parsing strings containing ``<TAB>`` s, and suggested
+   methods to maintain a consistent view of the parsed string, the parse
+   location, and line and column positions within the parsed string.
+   """
+    s = strg
+    return 1 if 0 < loc < len(s) and s[loc-1] == '\n' else loc - s.rfind("\n", 0, loc)
+
+def lineno(loc, strg):
+    """Returns current line number within a string, counting newlines as line separators.
+    The first line is number 1.
+
+    Note - the default parsing behavior is to expand tabs in the input string
+    before starting the parsing process.  See :class:`ParserElement.parseString`
+    for more information on parsing strings containing ``<TAB>`` s, and
+    suggested methods to maintain a consistent view of the parsed string, the
+    parse location, and line and column positions within the parsed string.
+    """
+    return strg.count("\n", 0, loc) + 1
+
+def line(loc, strg):
+    """Returns the line of text containing loc within a string, counting newlines as line separators.
+       """
+    lastCR = strg.rfind("\n", 0, loc)
+    nextCR = strg.find("\n", loc)
+    if nextCR >= 0:
+        return strg[lastCR + 1:nextCR]
+    else:
+        return strg[lastCR + 1:]
+
+def _defaultStartDebugAction(instring, loc, expr):
+    print(("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % (lineno(loc, instring), col(loc, instring))))
+
+def _defaultSuccessDebugAction(instring, startloc, endloc, expr, toks):
+    print("Matched " + _ustr(expr) + " -> " + str(toks.asList()))
+
+def _defaultExceptionDebugAction(instring, loc, expr, exc):
+    print("Exception raised:" + _ustr(exc))
+
+def nullDebugAction(*args):
+    """'Do-nothing' debug action, to suppress debugging output during parsing."""
+    pass
+
+# Only works on Python 3.x - nonlocal is toxic to Python 2 installs
+#~ 'decorator to trim function calls to match the arity of the target'
+#~ def _trim_arity(func, maxargs=3):
+    #~ if func in singleArgBuiltins:
+        #~ return lambda s,l,t: func(t)
+    #~ limit = 0
+    #~ foundArity = False
+    #~ def wrapper(*args):
+        #~ nonlocal limit,foundArity
+        #~ while 1:
+            #~ try:
+                #~ ret = func(*args[limit:])
+                #~ foundArity = True
+                #~ return ret
+            #~ except TypeError:
+                #~ if limit == maxargs or foundArity:
+                    #~ raise
+                #~ limit += 1
+                #~ continue
+    #~ return wrapper
+
+# this version is Python 2.x-3.x cross-compatible
+'decorator to trim function calls to match the arity of the target'
+def _trim_arity(func, maxargs=2):
+    if func in singleArgBuiltins:
+        return lambda s, l, t: func(t)
+    limit = [0]
+    foundArity = [False]
+
+    # traceback return data structure changed in Py3.5 - normalize back to plain tuples
+    if system_version[:2] >= (3, 5):
+        def extract_stack(limit=0):
+            # special handling for Python 3.5.0 - extra deep call stack by 1
+            offset = -3 if system_version == (3, 5, 0) else -2
+            frame_summary = traceback.extract_stack(limit=-offset + limit - 1)[offset]
+            return [frame_summary[:2]]
+        def extract_tb(tb, limit=0):
+            frames = traceback.extract_tb(tb, limit=limit)
+            frame_summary = frames[-1]
+            return [frame_summary[:2]]
+    else:
+        extract_stack = traceback.extract_stack
+        extract_tb = traceback.extract_tb
+
+    # synthesize what would be returned by traceback.extract_stack at the call to
+    # user's parse action 'func', so that we don't incur call penalty at parse time
+
+    LINE_DIFF = 6
+    # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND
+    # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!!
+    this_line = extract_stack(limit=2)[-1]
+    pa_call_line_synth = (this_line[0], this_line[1] + LINE_DIFF)
+
+    def wrapper(*args):
+        while 1:
+            try:
+                ret = func(*args[limit[0]:])
+                foundArity[0] = True
+                return ret
+            except TypeError:
+                # re-raise TypeErrors if they did not come from our arity testing
+                if foundArity[0]:
+                    raise
+                else:
+                    try:
+                        tb = sys.exc_info()[-1]
+                        if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth:
+                            raise
+                    finally:
+                        try:
+                            del tb
+                        except NameError:
+                            pass
+
+                if limit[0] <= maxargs:
+                    limit[0] += 1
+                    continue
+                raise
+
+    # copy func name to wrapper for sensible debug output
+    func_name = "<parse action>"
+    try:
+        func_name = getattr(func, '__name__',
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    wrapper.__name__ = func_name
+
+    return wrapper
+
+
+class ParserElement(object):
+    """Abstract base level parser element class."""
+    DEFAULT_WHITE_CHARS = " \n\t\r"
+    verbose_stacktrace = False
+
+    @staticmethod
+    def setDefaultWhitespaceChars(chars):
+        r"""
+        Overrides the default whitespace chars
+
+        Example::
+
+            # default whitespace chars are space, <TAB> and newline
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def', 'ghi', 'jkl']
+
+            # change to just treat newline as significant
+            ParserElement.setDefaultWhitespaceChars(" \t")
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def']
+        """
+        ParserElement.DEFAULT_WHITE_CHARS = chars
+
+    @staticmethod
+    def inlineLiteralsUsing(cls):
+        """
+        Set class to be used for inclusion of string literals into a parser.
+
+        Example::
+
+            # default literal class used is Literal
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+
+            # change to Suppress
+            ParserElement.inlineLiteralsUsing(Suppress)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '12', '31']
+        """
+        ParserElement._literalStringClass = cls
+
+    @classmethod
+    def _trim_traceback(cls, tb):
+        while tb.tb_next:
+            tb = tb.tb_next
+        return tb
+
+    def __init__(self, savelist=False):
+        self.parseAction = list()
+        self.failAction = None
+        # ~ self.name = "<unknown>"  # don't define self.name, let subclasses try/except upcall
+        self.strRepr = None
+        self.resultsName = None
+        self.saveAsList = savelist
+        self.skipWhitespace = True
+        self.whiteChars = set(ParserElement.DEFAULT_WHITE_CHARS)
+        self.copyDefaultWhiteChars = True
+        self.mayReturnEmpty = False # used when checking for left-recursion
+        self.keepTabs = False
+        self.ignoreExprs = list()
+        self.debug = False
+        self.streamlined = False
+        self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index
+        self.errmsg = ""
+        self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all)
+        self.debugActions = (None, None, None)  # custom debug actions
+        self.re = None
+        self.callPreparse = True # used to avoid redundant calls to preParse
+        self.callDuringTry = False
+
+    def copy(self):
+        """
+        Make a copy of this :class:`ParserElement`.  Useful for defining
+        different parse actions for the same parsing pattern, using copies of
+        the original parse element.
+
+        Example::
+
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            integerK = integer.copy().addParseAction(lambda toks: toks[0] * 1024) + Suppress("K")
+            integerM = integer.copy().addParseAction(lambda toks: toks[0] * 1024 * 1024) + Suppress("M")
+
+            print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))
+
+        prints::
+
+            [5120, 100, 655360, 268435456]
+
+        Equivalent form of ``expr.copy()`` is just ``expr()``::
+
+            integerM = integer().addParseAction(lambda toks: toks[0] * 1024 * 1024) + Suppress("M")
+        """
+        cpy = copy.copy(self)
+        cpy.parseAction = self.parseAction[:]
+        cpy.ignoreExprs = self.ignoreExprs[:]
+        if self.copyDefaultWhiteChars:
+            cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
+        return cpy
+
+    def setName(self, name):
+        """
+        Define name for this expression, makes debugging and exception messages clearer.
+
+        Example::
+
+            Word(nums).parseString("ABC")  # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)
+            Word(nums).setName("integer").parseString("ABC")  # -> Exception: Expected integer (at char 0), (line:1, col:1)
+        """
+        self.name = name
+        self.errmsg = "Expected " + self.name
+        if __diag__.enable_debug_on_named_expressions:
+            self.setDebug()
+        return self
+
+    def setResultsName(self, name, listAllMatches=False):
+        """
+        Define name for referencing matching tokens as a nested attribute
+        of the returned parse results.
+        NOTE: this returns a *copy* of the original :class:`ParserElement` object;
+        this is so that the client can define a basic element, such as an
+        integer, and reference it in multiple places with different names.
+
+        You can also set results names using the abbreviated syntax,
+        ``expr("name")`` in place of ``expr.setResultsName("name")``
+        - see :class:`__call__`.
+
+        Example::
+
+            date_str = (integer.setResultsName("year") + '/'
+                        + integer.setResultsName("month") + '/'
+                        + integer.setResultsName("day"))
+
+            # equivalent form:
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+        """
+        return self._setResultsName(name, listAllMatches)
+
+    def _setResultsName(self, name, listAllMatches=False):
+        newself = self.copy()
+        if name.endswith("*"):
+            name = name[:-1]
+            listAllMatches = True
+        newself.resultsName = name
+        newself.modalResults = not listAllMatches
+        return newself
+
+    def setBreak(self, breakFlag=True):
+        """Method to invoke the Python pdb debugger when this element is
+           about to be parsed. Set ``breakFlag`` to True to enable, False to
+           disable.
+        """
+        if breakFlag:
+            _parseMethod = self._parse
+            def breaker(instring, loc, doActions=True, callPreParse=True):
+                import pdb
+                # this call to pdb.set_trace() is intentional, not a checkin error
+                pdb.set_trace()
+                return _parseMethod(instring, loc, doActions, callPreParse)
+            breaker._originalParseMethod = _parseMethod
+            self._parse = breaker
+        else:
+            if hasattr(self._parse, "_originalParseMethod"):
+                self._parse = self._parse._originalParseMethod
+        return self
+
+    def setParseAction(self, *fns, **kwargs):
+        """
+        Define one or more actions to perform when successfully matching parse element definition.
+        Parse action fn is a callable method with 0-3 arguments, called as ``fn(s, loc, toks)`` ,
+        ``fn(loc, toks)`` , ``fn(toks)`` , or just ``fn()`` , where:
+
+        - s   = the original string being parsed (see note below)
+        - loc = the location of the matching substring
+        - toks = a list of the matched tokens, packaged as a :class:`ParseResults` object
+
+        If the functions in fns modify the tokens, they can return them as the return
+        value from fn, and the modified list of tokens will replace the original.
+        Otherwise, fn does not need to return any value.
+
+        If None is passed as the parse action, all previously added parse actions for this
+        expression are cleared.
+
+        Optional keyword arguments:
+        - callDuringTry = (default= ``False``) indicate if parse action should be run during lookaheads and alternate testing
+
+        Note: the default parsing behavior is to expand tabs in the input string
+        before starting the parsing process.  See :class:`parseString for more
+        information on parsing strings containing ``<TAB>`` s, and suggested
+        methods to maintain a consistent view of the parsed string, the parse
+        location, and line and column positions within the parsed string.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer + '/' + integer + '/' + integer
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+            # use parse action to convert to ints at parse time
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            date_str = integer + '/' + integer + '/' + integer
+
+            # note that integer fields are now ints, not strings
+            date_str.parseString("1999/12/31")  # -> [1999, '/', 12, '/', 31]
+        """
+        if list(fns) == [None,]:
+            self.parseAction = []
+        else:
+            if not all(callable(fn) for fn in fns):
+                raise TypeError("parse actions must be callable")
+            self.parseAction = list(map(_trim_arity, list(fns)))
+            self.callDuringTry = kwargs.get("callDuringTry", False)
+        return self
+
+    def addParseAction(self, *fns, **kwargs):
+        """
+        Add one or more parse actions to expression's list of parse actions. See :class:`setParseAction`.
+
+        See examples in :class:`copy`.
+        """
+        self.parseAction += list(map(_trim_arity, list(fns)))
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def addCondition(self, *fns, **kwargs):
+        """Add a boolean predicate function to expression's list of parse actions. See
+        :class:`setParseAction` for function call signatures. Unlike ``setParseAction``,
+        functions passed to ``addCondition`` need to return boolean success/fail of the condition.
+
+        Optional keyword arguments:
+        - message = define a custom message to be used in the raised exception
+        - fatal   = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException
+
+        Example::
+
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            year_int = integer.copy()
+            year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")
+            date_str = year_int + '/' + integer + '/' + integer
+
+            result = date_str.parseString("1999/12/31")  # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1)
+        """
+        for fn in fns:
+            self.parseAction.append(conditionAsParseAction(fn, message=kwargs.get('message'),
+                                                           fatal=kwargs.get('fatal', False)))
+
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def setFailAction(self, fn):
+        """Define action to perform if parsing fails at this expression.
+           Fail acton fn is a callable function that takes the arguments
+           ``fn(s, loc, expr, err)`` where:
+           - s = string being parsed
+           - loc = location where expression match was attempted and failed
+           - expr = the parse expression that failed
+           - err = the exception thrown
+           The function returns no value.  It may throw :class:`ParseFatalException`
+           if it is desired to stop parsing immediately."""
+        self.failAction = fn
+        return self
+
+    def _skipIgnorables(self, instring, loc):
+        exprsFound = True
+        while exprsFound:
+            exprsFound = False
+            for e in self.ignoreExprs:
+                try:
+                    while 1:
+                        loc, dummy = e._parse(instring, loc)
+                        exprsFound = True
+                except ParseException:
+                    pass
+        return loc
+
+    def preParse(self, instring, loc):
+        if self.ignoreExprs:
+            loc = self._skipIgnorables(instring, loc)
+
+        if self.skipWhitespace:
+            wt = self.whiteChars
+            instrlen = len(instring)
+            while loc < instrlen and instring[loc] in wt:
+                loc += 1
+
+        return loc
+
+    def parseImpl(self, instring, loc, doActions=True):
+        return loc, []
+
+    def postParse(self, instring, loc, tokenlist):
+        return tokenlist
+
+    # ~ @profile
+    def _parseNoCache(self, instring, loc, doActions=True, callPreParse=True):
+        TRY, MATCH, FAIL = 0, 1, 2
+        debugging = (self.debug)  # and doActions)
+
+        if debugging or self.failAction:
+            # ~ print ("Match", self, "at loc", loc, "(%d, %d)" % (lineno(loc, instring), col(loc, instring)))
+            if self.debugActions[TRY]:
+                self.debugActions[TRY](instring, loc, self)
+            try:
+                if callPreParse and self.callPreparse:
+                    preloc = self.preParse(instring, loc)
+                else:
+                    preloc = loc
+                tokensStart = preloc
+                if self.mayIndexError or preloc >= len(instring):
+                    try:
+                        loc, tokens = self.parseImpl(instring, preloc, doActions)
+                    except IndexError:
+                        raise ParseException(instring, len(instring), self.errmsg, self)
+                else:
+                    loc, tokens = self.parseImpl(instring, preloc, doActions)
+            except Exception as err:
+                # ~ print ("Exception raised:", err)
+                if self.debugActions[FAIL]:
+                    self.debugActions[FAIL](instring, tokensStart, self, err)
+                if self.failAction:
+                    self.failAction(instring, tokensStart, self, err)
+                raise
+        else:
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse(instring, loc)
+            else:
+                preloc = loc
+            tokensStart = preloc
+            if self.mayIndexError or preloc >= len(instring):
+                try:
+                    loc, tokens = self.parseImpl(instring, preloc, doActions)
+                except IndexError:
+                    raise ParseException(instring, len(instring), self.errmsg, self)
+            else:
+                loc, tokens = self.parseImpl(instring, preloc, doActions)
+
+        tokens = self.postParse(instring, loc, tokens)
+
+        retTokens = ParseResults(tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults)
+        if self.parseAction and (doActions or self.callDuringTry):
+            if debugging:
+                try:
+                    for fn in self.parseAction:
+                        try:
+                            tokens = fn(instring, tokensStart, retTokens)
+                        except IndexError as parse_action_exc:
+                            exc = ParseException("exception raised in parse action")
+                            exc.__cause__ = parse_action_exc
+                            raise exc
+
+                        if tokens is not None and tokens is not retTokens:
+                            retTokens = ParseResults(tokens,
+                                                      self.resultsName,
+                                                      asList=self.saveAsList and isinstance(tokens, (ParseResults, list)),
+                                                      modal=self.modalResults)
+                except Exception as err:
+                    # ~ print "Exception raised in user parse action:", err
+                    if self.debugActions[FAIL]:
+                        self.debugActions[FAIL](instring, tokensStart, self, err)
+                    raise
+            else:
+                for fn in self.parseAction:
+                    try:
+                        tokens = fn(instring, tokensStart, retTokens)
+                    except IndexError as parse_action_exc:
+                        exc = ParseException("exception raised in parse action")
+                        exc.__cause__ = parse_action_exc
+                        raise exc
+
+                    if tokens is not None and tokens is not retTokens:
+                        retTokens = ParseResults(tokens,
+                                                  self.resultsName,
+                                                  asList=self.saveAsList and isinstance(tokens, (ParseResults, list)),
+                                                  modal=self.modalResults)
+        if debugging:
+            # ~ print ("Matched", self, "->", retTokens.asList())
+            if self.debugActions[MATCH]:
+                self.debugActions[MATCH](instring, tokensStart, loc, self, retTokens)
+
+        return loc, retTokens
+
+    def tryParse(self, instring, loc):
+        try:
+            return self._parse(instring, loc, doActions=False)[0]
+        except ParseFatalException:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+    def canParseNext(self, instring, loc):
+        try:
+            self.tryParse(instring, loc)
+        except (ParseException, IndexError):
+            return False
+        else:
+            return True
+
+    class _UnboundedCache(object):
+        def __init__(self):
+            cache = {}
+            self.not_in_cache = not_in_cache = object()
+
+            def get(self, key):
+                return cache.get(key, not_in_cache)
+
+            def set(self, key, value):
+                cache[key] = value
+
+            def clear(self):
+                cache.clear()
+
+            def cache_len(self):
+                return len(cache)
+
+            self.get = types.MethodType(get, self)
+            self.set = types.MethodType(set, self)
+            self.clear = types.MethodType(clear, self)
+            self.__len__ = types.MethodType(cache_len, self)
+
+    if _OrderedDict is not None:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = _OrderedDict()
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(cache) > size:
+                        try:
+                            cache.popitem(False)
+                        except KeyError:
+                            pass
+
+                def clear(self):
+                    cache.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    else:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = {}
+                key_fifo = collections.deque([], size)
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(key_fifo) > size:
+                        cache.pop(key_fifo.popleft(), None)
+                    key_fifo.append(key)
+
+                def clear(self):
+                    cache.clear()
+                    key_fifo.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    # argument cache for optimizing repeated calls when backtracking through recursive expressions
+    packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail
+    packrat_cache_lock = RLock()
+    packrat_cache_stats = [0, 0]
+
+    # this method gets repeatedly called during backtracking with the same arguments -
+    # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression
+    def _parseCache(self, instring, loc, doActions=True, callPreParse=True):
+        HIT, MISS = 0, 1
+        lookup = (self, instring, loc, callPreParse, doActions)
+        with ParserElement.packrat_cache_lock:
+            cache = ParserElement.packrat_cache
+            value = cache.get(lookup)
+            if value is cache.not_in_cache:
+                ParserElement.packrat_cache_stats[MISS] += 1
+                try:
+                    value = self._parseNoCache(instring, loc, doActions, callPreParse)
+                except ParseBaseException as pe:
+                    # cache a copy of the exception, without the traceback
+                    cache.set(lookup, pe.__class__(*pe.args))
+                    raise
+                else:
+                    cache.set(lookup, (value[0], value[1].copy()))
+                    return value
+            else:
+                ParserElement.packrat_cache_stats[HIT] += 1
+                if isinstance(value, Exception):
+                    raise value
+                return value[0], value[1].copy()
+
+    _parse = _parseNoCache
+
+    @staticmethod
+    def resetCache():
+        ParserElement.packrat_cache.clear()
+        ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats)
+
+    _packratEnabled = False
+    @staticmethod
+    def enablePackrat(cache_size_limit=128):
+        """Enables "packrat" parsing, which adds memoizing to the parsing logic.
+           Repeated parse attempts at the same string location (which happens
+           often in many complex grammars) can immediately return a cached value,
+           instead of re-executing parsing/validating code.  Memoizing is done of
+           both valid results and parsing exceptions.
+
+           Parameters:
+
+           - cache_size_limit - (default= ``128``) - if an integer value is provided
+             will limit the size of the packrat cache; if None is passed, then
+             the cache size will be unbounded; if 0 is passed, the cache will
+             be effectively disabled.
+
+           This speedup may break existing programs that use parse actions that
+           have side-effects.  For this reason, packrat parsing is disabled when
+           you first import pyparsing.  To activate the packrat feature, your
+           program must call the class method :class:`ParserElement.enablePackrat`.
+           For best results, call ``enablePackrat()`` immediately after
+           importing pyparsing.
+
+           Example::
+
+               from pip._vendor import pyparsing
+               pyparsing.ParserElement.enablePackrat()
+        """
+        if not ParserElement._packratEnabled:
+            ParserElement._packratEnabled = True
+            if cache_size_limit is None:
+                ParserElement.packrat_cache = ParserElement._UnboundedCache()
+            else:
+                ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit)
+            ParserElement._parse = ParserElement._parseCache
+
+    def parseString(self, instring, parseAll=False):
+        """
+        Execute the parse expression with the given string.
+        This is the main interface to the client code, once the complete
+        expression has been built.
+
+        Returns the parsed data as a :class:`ParseResults` object, which may be
+        accessed as a list, or as a dict or object with attributes if the given parser
+        includes results names.
+
+        If you want the grammar to require that the entire input string be
+        successfully parsed, then set ``parseAll`` to True (equivalent to ending
+        the grammar with ``StringEnd()``).
+
+        Note: ``parseString`` implicitly calls ``expandtabs()`` on the input string,
+        in order to report proper column numbers in parse actions.
+        If the input string contains tabs and
+        the grammar uses parse actions that use the ``loc`` argument to index into the
+        string being parsed, you can ensure you have a consistent view of the input
+        string by:
+
+        - calling ``parseWithTabs`` on your grammar before calling ``parseString``
+          (see :class:`parseWithTabs`)
+        - define your parse action using the full ``(s, loc, toks)`` signature, and
+          reference the input string using the parse action's ``s`` argument
+        - explictly expand the tabs in your input string before calling
+          ``parseString``
+
+        Example::
+
+            Word('a').parseString('aaaaabaaa')  # -> ['aaaaa']
+            Word('a').parseString('aaaaabaaa', parseAll=True)  # -> Exception: Expected end of text
+        """
+        ParserElement.resetCache()
+        if not self.streamlined:
+            self.streamline()
+            # ~ self.saveAsList = True
+        for e in self.ignoreExprs:
+            e.streamline()
+        if not self.keepTabs:
+            instring = instring.expandtabs()
+        try:
+            loc, tokens = self._parse(instring, 0)
+            if parseAll:
+                loc = self.preParse(instring, loc)
+                se = Empty() + StringEnd()
+                se._parse(instring, loc)
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clearing out pyparsing internal stack trace
+                if getattr(exc, '__traceback__', None) is not None:
+                    exc.__traceback__ = self._trim_traceback(exc.__traceback__)
+                raise exc
+        else:
+            return tokens
+
+    def scanString(self, instring, maxMatches=_MAX_INT, overlap=False):
+        """
+        Scan the input string for expression matches.  Each match will return the
+        matching tokens, start location, and end location.  May be called with optional
+        ``maxMatches`` argument, to clip scanning after 'n' matches are found.  If
+        ``overlap`` is specified, then overlapping matches will be reported.
+
+        Note that the start and end locations are reported relative to the string
+        being parsed.  See :class:`parseString` for more information on parsing
+        strings with embedded tabs.
+
+        Example::
+
+            source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"
+            print(source)
+            for tokens, start, end in Word(alphas).scanString(source):
+                print(' '*start + '^'*(end-start))
+                print(' '*start + tokens[0])
+
+        prints::
+
+            sldjf123lsdjjkf345sldkjf879lkjsfd987
+            ^^^^^
+            sldjf
+                    ^^^^^^^
+                    lsdjjkf
+                              ^^^^^^
+                              sldkjf
+                                       ^^^^^^
+                                       lkjsfd
+        """
+        if not self.streamlined:
+            self.streamline()
+        for e in self.ignoreExprs:
+            e.streamline()
+
+        if not self.keepTabs:
+            instring = _ustr(instring).expandtabs()
+        instrlen = len(instring)
+        loc = 0
+        preparseFn = self.preParse
+        parseFn = self._parse
+        ParserElement.resetCache()
+        matches = 0
+        try:
+            while loc <= instrlen and matches < maxMatches:
+                try:
+                    preloc = preparseFn(instring, loc)
+                    nextLoc, tokens = parseFn(instring, preloc, callPreParse=False)
+                except ParseException:
+                    loc = preloc + 1
+                else:
+                    if nextLoc > loc:
+                        matches += 1
+                        yield tokens, preloc, nextLoc
+                        if overlap:
+                            nextloc = preparseFn(instring, loc)
+                            if nextloc > loc:
+                                loc = nextLoc
+                            else:
+                                loc += 1
+                        else:
+                            loc = nextLoc
+                    else:
+                        loc = preloc + 1
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clearing out pyparsing internal stack trace
+                if getattr(exc, '__traceback__', None) is not None:
+                    exc.__traceback__ = self._trim_traceback(exc.__traceback__)
+                raise exc
+
+    def transformString(self, instring):
+        """
+        Extension to :class:`scanString`, to modify matching text with modified tokens that may
+        be returned from a parse action.  To use ``transformString``, define a grammar and
+        attach a parse action to it that modifies the returned token list.
+        Invoking ``transformString()`` on a target string will then scan for matches,
+        and replace the matched text patterns according to the logic in the parse
+        action.  ``transformString()`` returns the resulting transformed string.
+
+        Example::
+
+            wd = Word(alphas)
+            wd.setParseAction(lambda toks: toks[0].title())
+
+            print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york."))
+
+        prints::
+
+            Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.
+        """
+        out = []
+        lastE = 0
+        # force preservation of <TAB>s, to minimize unwanted transformation of string, and to
+        # keep string locs straight between transformString and scanString
+        self.keepTabs = True
+        try:
+            for t, s, e in self.scanString(instring):
+                out.append(instring[lastE:s])
+                if t:
+                    if isinstance(t, ParseResults):
+                        out += t.asList()
+                    elif isinstance(t, list):
+                        out += t
+                    else:
+                        out.append(t)
+                lastE = e
+            out.append(instring[lastE:])
+            out = [o for o in out if o]
+            return "".join(map(_ustr, _flatten(out)))
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clearing out pyparsing internal stack trace
+                if getattr(exc, '__traceback__', None) is not None:
+                    exc.__traceback__ = self._trim_traceback(exc.__traceback__)
+                raise exc
+
+    def searchString(self, instring, maxMatches=_MAX_INT):
+        """
+        Another extension to :class:`scanString`, simplifying the access to the tokens found
+        to match the given parse expression.  May be called with optional
+        ``maxMatches`` argument, to clip searching after 'n' matches are found.
+
+        Example::
+
+            # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters
+            cap_word = Word(alphas.upper(), alphas.lower())
+
+            print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))
+
+            # the sum() builtin can be used to merge results into a single ParseResults object
+            print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")))
+
+        prints::
+
+            [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]
+            ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']
+        """
+        try:
+            return ParseResults([t for t, s, e in self.scanString(instring, maxMatches)])
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clearing out pyparsing internal stack trace
+                if getattr(exc, '__traceback__', None) is not None:
+                    exc.__traceback__ = self._trim_traceback(exc.__traceback__)
+                raise exc
+
+    def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False):
+        """
+        Generator method to split a string using the given expression as a separator.
+        May be called with optional ``maxsplit`` argument, to limit the number of splits;
+        and the optional ``includeSeparators`` argument (default= ``False``), if the separating
+        matching text should be included in the split results.
+
+        Example::
+
+            punc = oneOf(list(".,;:/-!?"))
+            print(list(punc.split("This, this?, this sentence, is badly punctuated!")))
+
+        prints::
+
+            ['This', ' this', '', ' this sentence', ' is badly punctuated', '']
+        """
+        splits = 0
+        last = 0
+        for t, s, e in self.scanString(instring, maxMatches=maxsplit):
+            yield instring[last:s]
+            if includeSeparators:
+                yield t[0]
+            last = e
+        yield instring[last:]
+
+    def __add__(self, other):
+        """
+        Implementation of + operator - returns :class:`And`. Adding strings to a ParserElement
+        converts them to :class:`Literal`s by default.
+
+        Example::
+
+            greet = Word(alphas) + "," + Word(alphas) + "!"
+            hello = "Hello, World!"
+            print (hello, "->", greet.parseString(hello))
+
+        prints::
+
+            Hello, World! -> ['Hello', ',', 'World', '!']
+
+        ``...`` may be used as a parse expression as a short form of :class:`SkipTo`.
+
+            Literal('start') + ... + Literal('end')
+
+        is equivalent to:
+
+            Literal('start') + SkipTo('end')("_skipped*") + Literal('end')
+
+        Note that the skipped text is returned with '_skipped' as a results name,
+        and to support having multiple skips in the same parser, the value returned is
+        a list of all skipped text.
+        """
+        if other is Ellipsis:
+            return _PendingSkip(self)
+
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                          SyntaxWarning, stacklevel=2)
+            return None
+        return And([self, other])
+
+    def __radd__(self, other):
+        """
+        Implementation of + operator when left operand is not a :class:`ParserElement`
+        """
+        if other is Ellipsis:
+            return SkipTo(self)("_skipped*") + self
+
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                          SyntaxWarning, stacklevel=2)
+            return None
+        return other + self
+
+    def __sub__(self, other):
+        """
+        Implementation of - operator, returns :class:`And` with error stop
+        """
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                          SyntaxWarning, stacklevel=2)
+            return None
+        return self + And._ErrorStop() + other
+
+    def __rsub__(self, other):
+        """
+        Implementation of - operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                          SyntaxWarning, stacklevel=2)
+            return None
+        return other - self
+
+    def __mul__(self, other):
+        """
+        Implementation of * operator, allows use of ``expr * 3`` in place of
+        ``expr + expr + expr``.  Expressions may also me multiplied by a 2-integer
+        tuple, similar to ``{min, max}`` multipliers in regular expressions.  Tuples
+        may also include ``None`` as in:
+         - ``expr*(n, None)`` or ``expr*(n, )`` is equivalent
+              to ``expr*n + ZeroOrMore(expr)``
+              (read as "at least n instances of ``expr``")
+         - ``expr*(None, n)`` is equivalent to ``expr*(0, n)``
+              (read as "0 to n instances of ``expr``")
+         - ``expr*(None, None)`` is equivalent to ``ZeroOrMore(expr)``
+         - ``expr*(1, None)`` is equivalent to ``OneOrMore(expr)``
+
+        Note that ``expr*(None, n)`` does not raise an exception if
+        more than n exprs exist in the input stream; that is,
+        ``expr*(None, n)`` does not enforce a maximum number of expr
+        occurrences.  If this behavior is desired, then write
+        ``expr*(None, n) + ~expr``
+        """
+        if other is Ellipsis:
+            other = (0, None)
+        elif isinstance(other, tuple) and other[:1] == (Ellipsis,):
+            other = ((0, ) + other[1:] + (None,))[:2]
+
+        if isinstance(other, int):
+            minElements, optElements = other, 0
+        elif isinstance(other, tuple):
+            other = tuple(o if o is not Ellipsis else None for o in other)
+            other = (other + (None, None))[:2]
+            if other[0] is None:
+                other = (0, other[1])
+            if isinstance(other[0], int) and other[1] is None:
+                if other[0] == 0:
+                    return ZeroOrMore(self)
+                if other[0] == 1:
+                    return OneOrMore(self)
+                else:
+                    return self * other[0] + ZeroOrMore(self)
+            elif isinstance(other[0], int) and isinstance(other[1], int):
+                minElements, optElements = other
+                optElements -= minElements
+            else:
+                raise TypeError("cannot multiply 'ParserElement' and ('%s', '%s') objects", type(other[0]), type(other[1]))
+        else:
+            raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other))
+
+        if minElements < 0:
+            raise ValueError("cannot multiply ParserElement by negative value")
+        if optElements < 0:
+            raise ValueError("second tuple value must be greater or equal to first tuple value")
+        if minElements == optElements == 0:
+            raise ValueError("cannot multiply ParserElement by 0 or (0, 0)")
+
+        if optElements:
+            def makeOptionalList(n):
+                if n > 1:
+                    return Optional(self + makeOptionalList(n - 1))
+                else:
+                    return Optional(self)
+            if minElements:
+                if minElements == 1:
+                    ret = self + makeOptionalList(optElements)
+                else:
+                    ret = And([self] * minElements) + makeOptionalList(optElements)
+            else:
+                ret = makeOptionalList(optElements)
+        else:
+            if minElements == 1:
+                ret = self
+            else:
+                ret = And([self] * minElements)
+        return ret
+
+    def __rmul__(self, other):
+        return self.__mul__(other)
+
+    def __or__(self, other):
+        """
+        Implementation of | operator - returns :class:`MatchFirst`
+        """
+        if other is Ellipsis:
+            return _PendingSkip(self, must_skip=True)
+
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                          SyntaxWarning, stacklevel=2)
+            return None
+        return MatchFirst([self, other])
+
+    def __ror__(self, other):
+        """
+        Implementation of | operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                          SyntaxWarning, stacklevel=2)
+            return None
+        return other | self
+
+    def __xor__(self, other):
+        """
+        Implementation of ^ operator - returns :class:`Or`
+        """
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                          SyntaxWarning, stacklevel=2)
+            return None
+        return Or([self, other])
+
+    def __rxor__(self, other):
+        """
+        Implementation of ^ operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                          SyntaxWarning, stacklevel=2)
+            return None
+        return other ^ self
+
+    def __and__(self, other):
+        """
+        Implementation of & operator - returns :class:`Each`
+        """
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                          SyntaxWarning, stacklevel=2)
+            return None
+        return Each([self, other])
+
+    def __rand__(self, other):
+        """
+        Implementation of & operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                          SyntaxWarning, stacklevel=2)
+            return None
+        return other & self
+
+    def __invert__(self):
+        """
+        Implementation of ~ operator - returns :class:`NotAny`
+        """
+        return NotAny(self)
+
+    def __iter__(self):
+        # must implement __iter__ to override legacy use of sequential access to __getitem__ to
+        # iterate over a sequence
+        raise TypeError('%r object is not iterable' % self.__class__.__name__)
+
+    def __getitem__(self, key):
+        """
+        use ``[]`` indexing notation as a short form for expression repetition:
+         - ``expr[n]`` is equivalent to ``expr*n``
+         - ``expr[m, n]`` is equivalent to ``expr*(m, n)``
+         - ``expr[n, ...]`` or ``expr[n,]`` is equivalent
+              to ``expr*n + ZeroOrMore(expr)``
+              (read as "at least n instances of ``expr``")
+         - ``expr[..., n]`` is equivalent to ``expr*(0, n)``
+              (read as "0 to n instances of ``expr``")
+         - ``expr[...]`` and ``expr[0, ...]`` are equivalent to ``ZeroOrMore(expr)``
+         - ``expr[1, ...]`` is equivalent to ``OneOrMore(expr)``
+         ``None`` may be used in place of ``...``.
+
+        Note that ``expr[..., n]`` and ``expr[m, n]``do not raise an exception
+        if more than ``n`` ``expr``s exist in the input stream.  If this behavior is
+        desired, then write ``expr[..., n] + ~expr``.
+       """
+
+        # convert single arg keys to tuples
+        try:
+            if isinstance(key, str):
+                key = (key,)
+            iter(key)
+        except TypeError:
+            key = (key, key)
+
+        if len(key) > 2:
+            warnings.warn("only 1 or 2 index arguments supported ({0}{1})".format(key[:5],
+                                                                                '... [{0}]'.format(len(key))
+                                                                                if len(key) > 5 else ''))
+
+        # clip to 2 elements
+        ret = self * tuple(key[:2])
+        return ret
+
+    def __call__(self, name=None):
+        """
+        Shortcut for :class:`setResultsName`, with ``listAllMatches=False``.
+
+        If ``name`` is given with a trailing ``'*'`` character, then ``listAllMatches`` will be
+        passed as ``True``.
+
+        If ``name` is omitted, same as calling :class:`copy`.
+
+        Example::
+
+            # these are equivalent
+            userdata = Word(alphas).setResultsName("name") + Word(nums + "-").setResultsName("socsecno")
+            userdata = Word(alphas)("name") + Word(nums + "-")("socsecno")
+        """
+        if name is not None:
+            return self._setResultsName(name)
+        else:
+            return self.copy()
+
+    def suppress(self):
+        """
+        Suppresses the output of this :class:`ParserElement`; useful to keep punctuation from
+        cluttering up returned output.
+        """
+        return Suppress(self)
+
+    def leaveWhitespace(self):
+        """
+        Disables the skipping of whitespace before matching the characters in the
+        :class:`ParserElement`'s defined pattern.  This is normally only used internally by
+        the pyparsing module, but may be needed in some whitespace-sensitive grammars.
+        """
+        self.skipWhitespace = False
+        return self
+
+    def setWhitespaceChars(self, chars):
+        """
+        Overrides the default whitespace chars
+        """
+        self.skipWhitespace = True
+        self.whiteChars = chars
+        self.copyDefaultWhiteChars = False
+        return self
+
+    def parseWithTabs(self):
+        """
+        Overrides default behavior to expand ``<TAB>``s to spaces before parsing the input string.
+        Must be called before ``parseString`` when the input grammar contains elements that
+        match ``<TAB>`` characters.
+        """
+        self.keepTabs = True
+        return self
+
+    def ignore(self, other):
+        """
+        Define expression to be ignored (e.g., comments) while doing pattern
+        matching; may be called repeatedly, to define multiple comment or other
+        ignorable patterns.
+
+        Example::
+
+            patt = OneOrMore(Word(alphas))
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']
+
+            patt.ignore(cStyleComment)
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']
+        """
+        if isinstance(other, basestring):
+            other = Suppress(other)
+
+        if isinstance(other, Suppress):
+            if other not in self.ignoreExprs:
+                self.ignoreExprs.append(other)
+        else:
+            self.ignoreExprs.append(Suppress(other.copy()))
+        return self
+
+    def setDebugActions(self, startAction, successAction, exceptionAction):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        """
+        self.debugActions = (startAction or _defaultStartDebugAction,
+                             successAction or _defaultSuccessDebugAction,
+                             exceptionAction or _defaultExceptionDebugAction)
+        self.debug = True
+        return self
+
+    def setDebug(self, flag=True):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        Set ``flag`` to True to enable, False to disable.
+
+        Example::
+
+            wd = Word(alphas).setName("alphaword")
+            integer = Word(nums).setName("numword")
+            term = wd | integer
+
+            # turn on debugging for wd
+            wd.setDebug()
+
+            OneOrMore(term).parseString("abc 123 xyz 890")
+
+        prints::
+
+            Match alphaword at loc 0(1,1)
+            Matched alphaword -> ['abc']
+            Match alphaword at loc 3(1,4)
+            Exception raised:Expected alphaword (at char 4), (line:1, col:5)
+            Match alphaword at loc 7(1,8)
+            Matched alphaword -> ['xyz']
+            Match alphaword at loc 11(1,12)
+            Exception raised:Expected alphaword (at char 12), (line:1, col:13)
+            Match alphaword at loc 15(1,16)
+            Exception raised:Expected alphaword (at char 15), (line:1, col:16)
+
+        The output shown is that produced by the default debug actions - custom debug actions can be
+        specified using :class:`setDebugActions`. Prior to attempting
+        to match the ``wd`` expression, the debugging message ``"Match <exprname> at loc <n>(<line>,<col>)"``
+        is shown. Then if the parse succeeds, a ``"Matched"`` message is shown, or an ``"Exception raised"``
+        message is shown. Also note the use of :class:`setName` to assign a human-readable name to the expression,
+        which makes debugging and exception messages easier to understand - for instance, the default
+        name created for the :class:`Word` expression without calling ``setName`` is ``"W:(ABCD...)"``.
+        """
+        if flag:
+            self.setDebugActions(_defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction)
+        else:
+            self.debug = False
+        return self
+
+    def __str__(self):
+        return self.name
+
+    def __repr__(self):
+        return _ustr(self)
+
+    def streamline(self):
+        self.streamlined = True
+        self.strRepr = None
+        return self
+
+    def checkRecursion(self, parseElementList):
+        pass
+
+    def validate(self, validateTrace=None):
+        """
+        Check defined expressions for valid structure, check for infinite recursive definitions.
+        """
+        self.checkRecursion([])
+
+    def parseFile(self, file_or_filename, parseAll=False):
+        """
+        Execute the parse expression on the given file or filename.
+        If a filename is specified (instead of a file object),
+        the entire file is opened, read, and closed before parsing.
+        """
+        try:
+            file_contents = file_or_filename.read()
+        except AttributeError:
+            with open(file_or_filename, "r") as f:
+                file_contents = f.read()
+        try:
+            return self.parseString(file_contents, parseAll)
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clearing out pyparsing internal stack trace
+                if getattr(exc, '__traceback__', None) is not None:
+                    exc.__traceback__ = self._trim_traceback(exc.__traceback__)
+                raise exc
+
+    def __eq__(self, other):
+        if self is other:
+            return True
+        elif isinstance(other, basestring):
+            return self.matches(other)
+        elif isinstance(other, ParserElement):
+            return vars(self) == vars(other)
+        return False
+
+    def __ne__(self, other):
+        return not (self == other)
+
+    def __hash__(self):
+        return id(self)
+
+    def __req__(self, other):
+        return self == other
+
+    def __rne__(self, other):
+        return not (self == other)
+
+    def matches(self, testString, parseAll=True):
+        """
+        Method for quick testing of a parser against a test string. Good for simple
+        inline microtests of sub expressions while building up larger parser.
+
+        Parameters:
+         - testString - to test against this expression for a match
+         - parseAll - (default= ``True``) - flag to pass to :class:`parseString` when running tests
+
+        Example::
+
+            expr = Word(nums)
+            assert expr.matches("100")
+        """
+        try:
+            self.parseString(_ustr(testString), parseAll=parseAll)
+            return True
+        except ParseBaseException:
+            return False
+
+    def runTests(self, tests, parseAll=True, comment='#',
+                 fullDump=True, printResults=True, failureTests=False, postParse=None,
+                 file=None):
+        """
+        Execute the parse expression on a series of test strings, showing each
+        test, the parsed results or where the parse failed. Quick and easy way to
+        run a parse expression against a list of sample strings.
+
+        Parameters:
+         - tests - a list of separate test strings, or a multiline string of test strings
+         - parseAll - (default= ``True``) - flag to pass to :class:`parseString` when running tests
+         - comment - (default= ``'#'``) - expression for indicating embedded comments in the test
+              string; pass None to disable comment filtering
+         - fullDump - (default= ``True``) - dump results as list followed by results names in nested outline;
+              if False, only dump nested list
+         - printResults - (default= ``True``) prints test output to stdout
+         - failureTests - (default= ``False``) indicates if these tests are expected to fail parsing
+         - postParse - (default= ``None``) optional callback for successful parse results; called as
+              `fn(test_string, parse_results)` and returns a string to be added to the test output
+         - file - (default=``None``) optional file-like object to which test output will be written;
+              if None, will default to ``sys.stdout``
+
+        Returns: a (success, results) tuple, where success indicates that all tests succeeded
+        (or failed if ``failureTests`` is True), and the results contain a list of lines of each
+        test's output
+
+        Example::
+
+            number_expr = pyparsing_common.number.copy()
+
+            result = number_expr.runTests('''
+                # unsigned integer
+                100
+                # negative integer
+                -100
+                # float with scientific notation
+                6.02e23
+                # integer with scientific notation
+                1e-12
+                ''')
+            print("Success" if result[0] else "Failed!")
+
+            result = number_expr.runTests('''
+                # stray character
+                100Z
+                # missing leading digit before '.'
+                -.100
+                # too many '.'
+                3.14.159
+                ''', failureTests=True)
+            print("Success" if result[0] else "Failed!")
+
+        prints::
+
+            # unsigned integer
+            100
+            [100]
+
+            # negative integer
+            -100
+            [-100]
+
+            # float with scientific notation
+            6.02e23
+            [6.02e+23]
+
+            # integer with scientific notation
+            1e-12
+            [1e-12]
+
+            Success
+
+            # stray character
+            100Z
+               ^
+            FAIL: Expected end of text (at char 3), (line:1, col:4)
+
+            # missing leading digit before '.'
+            -.100
+            ^
+            FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)
+
+            # too many '.'
+            3.14.159
+                ^
+            FAIL: Expected end of text (at char 4), (line:1, col:5)
+
+            Success
+
+        Each test string must be on a single line. If you want to test a string that spans multiple
+        lines, create a test like this::
+
+            expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines")
+
+        (Note that this is a raw string literal, you must include the leading 'r'.)
+        """
+        if isinstance(tests, basestring):
+            tests = list(map(str.strip, tests.rstrip().splitlines()))
+        if isinstance(comment, basestring):
+            comment = Literal(comment)
+        if file is None:
+            file = sys.stdout
+        print_ = file.write
+
+        allResults = []
+        comments = []
+        success = True
+        NL = Literal(r'\n').addParseAction(replaceWith('\n')).ignore(quotedString)
+        BOM = u'\ufeff'
+        for t in tests:
+            if comment is not None and comment.matches(t, False) or comments and not t:
+                comments.append(t)
+                continue
+            if not t:
+                continue
+            out = ['\n' + '\n'.join(comments) if comments else '', t]
+            comments = []
+            try:
+                # convert newline marks to actual newlines, and strip leading BOM if present
+                t = NL.transformString(t.lstrip(BOM))
+                result = self.parseString(t, parseAll=parseAll)
+            except ParseBaseException as pe:
+                fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else ""
+                if '\n' in t:
+                    out.append(line(pe.loc, t))
+                    out.append(' ' * (col(pe.loc, t) - 1) + '^' + fatal)
+                else:
+                    out.append(' ' * pe.loc + '^' + fatal)
+                out.append("FAIL: " + str(pe))
+                success = success and failureTests
+                result = pe
+            except Exception as exc:
+                out.append("FAIL-EXCEPTION: " + str(exc))
+                success = success and failureTests
+                result = exc
+            else:
+                success = success and not failureTests
+                if postParse is not None:
+                    try:
+                        pp_value = postParse(t, result)
+                        if pp_value is not None:
+                            if isinstance(pp_value, ParseResults):
+                                out.append(pp_value.dump())
+                            else:
+                                out.append(str(pp_value))
+                        else:
+                            out.append(result.dump())
+                    except Exception as e:
+                        out.append(result.dump(full=fullDump))
+                        out.append("{0} failed: {1}: {2}".format(postParse.__name__, type(e).__name__, e))
+                else:
+                    out.append(result.dump(full=fullDump))
+
+            if printResults:
+                if fullDump:
+                    out.append('')
+                print_('\n'.join(out))
+
+            allResults.append((t, result))
+
+        return success, allResults
+
+
+class _PendingSkip(ParserElement):
+    # internal placeholder class to hold a place were '...' is added to a parser element,
+    # once another ParserElement is added, this placeholder will be replaced with a SkipTo
+    def __init__(self, expr, must_skip=False):
+        super(_PendingSkip, self).__init__()
+        self.strRepr = str(expr + Empty()).replace('Empty', '...')
+        self.name = self.strRepr
+        self.anchor = expr
+        self.must_skip = must_skip
+
+    def __add__(self, other):
+        skipper = SkipTo(other).setName("...")("_skipped*")
+        if self.must_skip:
+            def must_skip(t):
+                if not t._skipped or t._skipped.asList() == ['']:
+                    del t[0]
+                    t.pop("_skipped", None)
+            def show_skip(t):
+                if t._skipped.asList()[-1:] == ['']:
+                    skipped = t.pop('_skipped')
+                    t['_skipped'] = 'missing <' + repr(self.anchor) + '>'
+            return (self.anchor + skipper().addParseAction(must_skip)
+                    | skipper().addParseAction(show_skip)) + other
+
+        return self.anchor + skipper + other
+
+    def __repr__(self):
+        return self.strRepr
+
+    def parseImpl(self, *args):
+        raise Exception("use of `...` expression without following SkipTo target expression")
+
+
+class Token(ParserElement):
+    """Abstract :class:`ParserElement` subclass, for defining atomic
+    matching patterns.
+    """
+    def __init__(self):
+        super(Token, self).__init__(savelist=False)
+
+
+class Empty(Token):
+    """An empty token, will always match.
+    """
+    def __init__(self):
+        super(Empty, self).__init__()
+        self.name = "Empty"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+
+class NoMatch(Token):
+    """A token that will never match.
+    """
+    def __init__(self):
+        super(NoMatch, self).__init__()
+        self.name = "NoMatch"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.errmsg = "Unmatchable token"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Literal(Token):
+    """Token to exactly match a specified string.
+
+    Example::
+
+        Literal('blah').parseString('blah')  # -> ['blah']
+        Literal('blah').parseString('blahfooblah')  # -> ['blah']
+        Literal('blah').parseString('bla')  # -> Exception: Expected "blah"
+
+    For case-insensitive matching, use :class:`CaselessLiteral`.
+
+    For keyword matching (force word break before and after the matched string),
+    use :class:`Keyword` or :class:`CaselessKeyword`.
+    """
+    def __init__(self, matchString):
+        super(Literal, self).__init__()
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Literal; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+            self.__class__ = Empty
+        self.name = '"%s"' % _ustr(self.match)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+
+        # Performance tuning: modify __class__ to select
+        # a parseImpl optimized for single-character check
+        if self.matchLen == 1 and type(self) is Literal:
+            self.__class__ = _SingleCharLiteral
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc] == self.firstMatchChar and instring.startswith(self.match, loc):
+            return loc + self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class _SingleCharLiteral(Literal):
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc] == self.firstMatchChar:
+            return loc + 1, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+_L = Literal
+ParserElement._literalStringClass = Literal
+
+class Keyword(Token):
+    """Token to exactly match a specified string as a keyword, that is,
+    it must be immediately followed by a non-keyword character.  Compare
+    with :class:`Literal`:
+
+     - ``Literal("if")`` will match the leading ``'if'`` in
+       ``'ifAndOnlyIf'``.
+     - ``Keyword("if")`` will not; it will only match the leading
+       ``'if'`` in ``'if x=1'``, or ``'if(y==2)'``
+
+    Accepts two optional constructor arguments in addition to the
+    keyword string:
+
+     - ``identChars`` is a string of characters that would be valid
+       identifier characters, defaulting to all alphanumerics + "_" and
+       "$"
+     - ``caseless`` allows case-insensitive matching, default is ``False``.
+
+    Example::
+
+        Keyword("start").parseString("start")  # -> ['start']
+        Keyword("start").parseString("starting")  # -> Exception
+
+    For case-insensitive matching, use :class:`CaselessKeyword`.
+    """
+    DEFAULT_KEYWORD_CHARS = alphanums + "_$"
+
+    def __init__(self, matchString, identChars=None, caseless=False):
+        super(Keyword, self).__init__()
+        if identChars is None:
+            identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Keyword; use Empty() instead",
+                          SyntaxWarning, stacklevel=2)
+        self.name = '"%s"' % self.match
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+        self.caseless = caseless
+        if caseless:
+            self.caselessmatch = matchString.upper()
+            identChars = identChars.upper()
+        self.identChars = set(identChars)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if self.caseless:
+            if ((instring[loc:loc + self.matchLen].upper() == self.caselessmatch)
+                    and (loc >= len(instring) - self.matchLen
+                         or instring[loc + self.matchLen].upper() not in self.identChars)
+                    and (loc == 0
+                         or instring[loc - 1].upper() not in self.identChars)):
+                return loc + self.matchLen, self.match
+
+        else:
+            if instring[loc] == self.firstMatchChar:
+                if ((self.matchLen == 1 or instring.startswith(self.match, loc))
+                        and (loc >= len(instring) - self.matchLen
+                             or instring[loc + self.matchLen] not in self.identChars)
+                        and (loc == 0 or instring[loc - 1] not in self.identChars)):
+                    return loc + self.matchLen, self.match
+
+        raise ParseException(instring, loc, self.errmsg, self)
+
+    def copy(self):
+        c = super(Keyword, self).copy()
+        c.identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        return c
+
+    @staticmethod
+    def setDefaultKeywordChars(chars):
+        """Overrides the default Keyword chars
+        """
+        Keyword.DEFAULT_KEYWORD_CHARS = chars
+
+class CaselessLiteral(Literal):
+    """Token to match a specified string, ignoring case of letters.
+    Note: the matched results will always be in the case of the given
+    match string, NOT the case of the input text.
+
+    Example::
+
+        OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD']
+
+    (Contrast with example for :class:`CaselessKeyword`.)
+    """
+    def __init__(self, matchString):
+        super(CaselessLiteral, self).__init__(matchString.upper())
+        # Preserve the defining literal.
+        self.returnString = matchString
+        self.name = "'%s'" % self.returnString
+        self.errmsg = "Expected " + self.name
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc:loc + self.matchLen].upper() == self.match:
+            return loc + self.matchLen, self.returnString
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class CaselessKeyword(Keyword):
+    """
+    Caseless version of :class:`Keyword`.
+
+    Example::
+
+        OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD']
+
+    (Contrast with example for :class:`CaselessLiteral`.)
+    """
+    def __init__(self, matchString, identChars=None):
+        super(CaselessKeyword, self).__init__(matchString, identChars, caseless=True)
+
+class CloseMatch(Token):
+    """A variation on :class:`Literal` which matches "close" matches,
+    that is, strings with at most 'n' mismatching characters.
+    :class:`CloseMatch` takes parameters:
+
+     - ``match_string`` - string to be matched
+     - ``maxMismatches`` - (``default=1``) maximum number of
+       mismatches allowed to count as a match
+
+    The results from a successful parse will contain the matched text
+    from the input string and the following named results:
+
+     - ``mismatches`` - a list of the positions within the
+       match_string where mismatches were found
+     - ``original`` - the original match_string used to compare
+       against the input string
+
+    If ``mismatches`` is an empty list, then the match was an exact
+    match.
+
+    Example::
+
+        patt = CloseMatch("ATCATCGAATGGA")
+        patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})
+        patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)
+
+        # exact match
+        patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})
+
+        # close match allowing up to 2 mismatches
+        patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2)
+        patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})
+    """
+    def __init__(self, match_string, maxMismatches=1):
+        super(CloseMatch, self).__init__()
+        self.name = match_string
+        self.match_string = match_string
+        self.maxMismatches = maxMismatches
+        self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches)
+        self.mayIndexError = False
+        self.mayReturnEmpty = False
+
+    def parseImpl(self, instring, loc, doActions=True):
+        start = loc
+        instrlen = len(instring)
+        maxloc = start + len(self.match_string)
+
+        if maxloc <= instrlen:
+            match_string = self.match_string
+            match_stringloc = 0
+            mismatches = []
+            maxMismatches = self.maxMismatches
+
+            for match_stringloc, s_m in enumerate(zip(instring[loc:maxloc], match_string)):
+                src, mat = s_m
+                if src != mat:
+                    mismatches.append(match_stringloc)
+                    if len(mismatches) > maxMismatches:
+                        break
+            else:
+                loc = match_stringloc + 1
+                results = ParseResults([instring[start:loc]])
+                results['original'] = match_string
+                results['mismatches'] = mismatches
+                return loc, results
+
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Word(Token):
+    """Token for matching words composed of allowed character sets.
+    Defined with string containing all allowed initial characters, an
+    optional string containing allowed body characters (if omitted,
+    defaults to the initial character set), and an optional minimum,
+    maximum, and/or exact length.  The default value for ``min`` is
+    1 (a minimum value < 1 is not valid); the default values for
+    ``max`` and ``exact`` are 0, meaning no maximum or exact
+    length restriction. An optional ``excludeChars`` parameter can
+    list characters that might be found in the input ``bodyChars``
+    string; useful to define a word of all printables except for one or
+    two characters, for instance.
+
+    :class:`srange` is useful for defining custom character set strings
+    for defining ``Word`` expressions, using range notation from
+    regular expression character sets.
+
+    A common mistake is to use :class:`Word` to match a specific literal
+    string, as in ``Word("Address")``. Remember that :class:`Word`
+    uses the string argument to define *sets* of matchable characters.
+    This expression would match "Add", "AAA", "dAred", or any other word
+    made up of the characters 'A', 'd', 'r', 'e', and 's'. To match an
+    exact literal string, use :class:`Literal` or :class:`Keyword`.
+
+    pyparsing includes helper strings for building Words:
+
+     - :class:`alphas`
+     - :class:`nums`
+     - :class:`alphanums`
+     - :class:`hexnums`
+     - :class:`alphas8bit` (alphabetic characters in ASCII range 128-255
+       - accented, tilded, umlauted, etc.)
+     - :class:`punc8bit` (non-alphabetic characters in ASCII range
+       128-255 - currency, symbols, superscripts, diacriticals, etc.)
+     - :class:`printables` (any non-whitespace character)
+
+    Example::
+
+        # a word composed of digits
+        integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))
+
+        # a word with a leading capital, and zero or more lowercase
+        capital_word = Word(alphas.upper(), alphas.lower())
+
+        # hostnames are alphanumeric, with leading alpha, and '-'
+        hostname = Word(alphas, alphanums + '-')
+
+        # roman numeral (not a strict parser, accepts invalid mix of characters)
+        roman = Word("IVXLCDM")
+
+        # any string of non-whitespace characters, except for ','
+        csv_value = Word(printables, excludeChars=",")
+    """
+    def __init__(self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None):
+        super(Word, self).__init__()
+        if excludeChars:
+            excludeChars = set(excludeChars)
+            initChars = ''.join(c for c in initChars if c not in excludeChars)
+            if bodyChars:
+                bodyChars = ''.join(c for c in bodyChars if c not in excludeChars)
+        self.initCharsOrig = initChars
+        self.initChars = set(initChars)
+        if bodyChars:
+            self.bodyCharsOrig = bodyChars
+            self.bodyChars = set(bodyChars)
+        else:
+            self.bodyCharsOrig = initChars
+            self.bodyChars = set(initChars)
+
+        self.maxSpecified = max > 0
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.asKeyword = asKeyword
+
+        if ' ' not in self.initCharsOrig + self.bodyCharsOrig and (min == 1 and max == 0 and exact == 0):
+            if self.bodyCharsOrig == self.initCharsOrig:
+                self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig)
+            elif len(self.initCharsOrig) == 1:
+                self.reString = "%s[%s]*" % (re.escape(self.initCharsOrig),
+                                             _escapeRegexRangeChars(self.bodyCharsOrig),)
+            else:
+                self.reString = "[%s][%s]*" % (_escapeRegexRangeChars(self.initCharsOrig),
+                                               _escapeRegexRangeChars(self.bodyCharsOrig),)
+            if self.asKeyword:
+                self.reString = r"\b" + self.reString + r"\b"
+
+            try:
+                self.re = re.compile(self.reString)
+            except Exception:
+                self.re = None
+            else:
+                self.re_match = self.re.match
+                self.__class__ = _WordRegex
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc] not in self.initChars:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        instrlen = len(instring)
+        bodychars = self.bodyChars
+        maxloc = start + self.maxLen
+        maxloc = min(maxloc, instrlen)
+        while loc < maxloc and instring[loc] in bodychars:
+            loc += 1
+
+        throwException = False
+        if loc - start < self.minLen:
+            throwException = True
+        elif self.maxSpecified and loc < instrlen and instring[loc] in bodychars:
+            throwException = True
+        elif self.asKeyword:
+            if (start > 0 and instring[start - 1] in bodychars
+                    or loc < instrlen and instring[loc] in bodychars):
+                throwException = True
+
+        if throwException:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__(self):
+        try:
+            return super(Word, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+
+            def charsAsStr(s):
+                if len(s) > 4:
+                    return s[:4] + "..."
+                else:
+                    return s
+
+            if self.initCharsOrig != self.bodyCharsOrig:
+                self.strRepr = "W:(%s, %s)" % (charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig))
+            else:
+                self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig)
+
+        return self.strRepr
+
+class _WordRegex(Word):
+    def parseImpl(self, instring, loc, doActions=True):
+        result = self.re_match(instring, loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        return loc, result.group()
+
+
+class Char(_WordRegex):
+    """A short-cut class for defining ``Word(characters, exact=1)``,
+    when defining a match of any single character in a string of
+    characters.
+    """
+    def __init__(self, charset, asKeyword=False, excludeChars=None):
+        super(Char, self).__init__(charset, exact=1, asKeyword=asKeyword, excludeChars=excludeChars)
+        self.reString = "[%s]" % _escapeRegexRangeChars(''.join(self.initChars))
+        if asKeyword:
+            self.reString = r"\b%s\b" % self.reString
+        self.re = re.compile(self.reString)
+        self.re_match = self.re.match
+
+
+class Regex(Token):
+    r"""Token for matching strings that match a given regular
+    expression. Defined with string specifying the regular expression in
+    a form recognized by the stdlib Python  `re module <https://docs.python.org/3/library/re.html>`_.
+    If the given regex contains named groups (defined using ``(?P<name>...)``),
+    these will be preserved as named parse results.
+
+    If instead of the Python stdlib re module you wish to use a different RE module
+    (such as the `regex` module), you can replace it by either building your
+    Regex object with a compiled RE that was compiled using regex:
+
+    Example::
+
+        realnum = Regex(r"[+-]?\d+\.\d*")
+        date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')
+        # ref: https://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression
+        roman = Regex(r"M{0,4}(CM|CD|D?{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")
+
+        # use regex module instead of stdlib re module to construct a Regex using
+        # a compiled regular expression
+        import regex
+        parser = pp.Regex(regex.compile(r'[0-9]'))
+
+    """
+    def __init__(self, pattern, flags=0, asGroupList=False, asMatch=False):
+        """The parameters ``pattern`` and ``flags`` are passed
+        to the ``re.compile()`` function as-is. See the Python
+        `re module <https://docs.python.org/3/library/re.html>`_ module for an
+        explanation of the acceptable patterns and flags.
+        """
+        super(Regex, self).__init__()
+
+        if isinstance(pattern, basestring):
+            if not pattern:
+                warnings.warn("null string passed to Regex; use Empty() instead",
+                              SyntaxWarning, stacklevel=2)
+
+            self.pattern = pattern
+            self.flags = flags
+
+            try:
+                self.re = re.compile(self.pattern, self.flags)
+                self.reString = self.pattern
+            except sre_constants.error:
+                warnings.warn("invalid pattern (%s) passed to Regex" % pattern,
+                              SyntaxWarning, stacklevel=2)
+                raise
+
+        elif hasattr(pattern, 'pattern') and hasattr(pattern, 'match'):
+            self.re = pattern
+            self.pattern = self.reString = pattern.pattern
+            self.flags = flags
+
+        else:
+            raise TypeError("Regex may only be constructed with a string or a compiled RE object")
+
+        self.re_match = self.re.match
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = self.re_match("") is not None
+        self.asGroupList = asGroupList
+        self.asMatch = asMatch
+        if self.asGroupList:
+            self.parseImpl = self.parseImplAsGroupList
+        if self.asMatch:
+            self.parseImpl = self.parseImplAsMatch
+
+    def parseImpl(self, instring, loc, doActions=True):
+        result = self.re_match(instring, loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = ParseResults(result.group())
+        d = result.groupdict()
+        if d:
+            for k, v in d.items():
+                ret[k] = v
+        return loc, ret
+
+    def parseImplAsGroupList(self, instring, loc, doActions=True):
+        result = self.re_match(instring, loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result.groups()
+        return loc, ret
+
+    def parseImplAsMatch(self, instring, loc, doActions=True):
+        result = self.re_match(instring, loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result
+        return loc, ret
+
+    def __str__(self):
+        try:
+            return super(Regex, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "Re:(%s)" % repr(self.pattern)
+
+        return self.strRepr
+
+    def sub(self, repl):
+        r"""
+        Return Regex with an attached parse action to transform the parsed
+        result as if called using `re.sub(expr, repl, string) <https://docs.python.org/3/library/re.html#re.sub>`_.
+
+        Example::
+
+            make_html = Regex(r"(\w+):(.*?):").sub(r"<\1>\2</\1>")
+            print(make_html.transformString("h1:main title:"))
+            # prints "<h1>main title</h1>"
+        """
+        if self.asGroupList:
+            warnings.warn("cannot use sub() with Regex(asGroupList=True)",
+                          SyntaxWarning, stacklevel=2)
+            raise SyntaxError()
+
+        if self.asMatch and callable(repl):
+            warnings.warn("cannot use sub() with a callable with Regex(asMatch=True)",
+                          SyntaxWarning, stacklevel=2)
+            raise SyntaxError()
+
+        if self.asMatch:
+            def pa(tokens):
+                return tokens[0].expand(repl)
+        else:
+            def pa(tokens):
+                return self.re.sub(repl, tokens[0])
+        return self.addParseAction(pa)
+
+class QuotedString(Token):
+    r"""
+    Token for matching strings that are delimited by quoting characters.
+
+    Defined with the following parameters:
+
+        - quoteChar - string of one or more characters defining the
+          quote delimiting string
+        - escChar - character to escape quotes, typically backslash
+          (default= ``None``)
+        - escQuote - special quote sequence to escape an embedded quote
+          string (such as SQL's ``""`` to escape an embedded ``"``)
+          (default= ``None``)
+        - multiline - boolean indicating whether quotes can span
+          multiple lines (default= ``False``)
+        - unquoteResults - boolean indicating whether the matched text
+          should be unquoted (default= ``True``)
+        - endQuoteChar - string of one or more characters defining the
+          end of the quote delimited string (default= ``None``  => same as
+          quoteChar)
+        - convertWhitespaceEscapes - convert escaped whitespace
+          (``'\t'``, ``'\n'``, etc.) to actual whitespace
+          (default= ``True``)
+
+    Example::
+
+        qs = QuotedString('"')
+        print(qs.searchString('lsjdf "This is the quote" sldjf'))
+        complex_qs = QuotedString('{{', endQuoteChar='}}')
+        print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf'))
+        sql_qs = QuotedString('"', escQuote='""')
+        print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))
+
+    prints::
+
+        [['This is the quote']]
+        [['This is the "quote"']]
+        [['This is the quote with "embedded" quotes']]
+    """
+    def __init__(self, quoteChar, escChar=None, escQuote=None, multiline=False,
+                 unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True):
+        super(QuotedString, self).__init__()
+
+        # remove white space from quote chars - wont work anyway
+        quoteChar = quoteChar.strip()
+        if not quoteChar:
+            warnings.warn("quoteChar cannot be the empty string", SyntaxWarning, stacklevel=2)
+            raise SyntaxError()
+
+        if endQuoteChar is None:
+            endQuoteChar = quoteChar
+        else:
+            endQuoteChar = endQuoteChar.strip()
+            if not endQuoteChar:
+                warnings.warn("endQuoteChar cannot be the empty string", SyntaxWarning, stacklevel=2)
+                raise SyntaxError()
+
+        self.quoteChar = quoteChar
+        self.quoteCharLen = len(quoteChar)
+        self.firstQuoteChar = quoteChar[0]
+        self.endQuoteChar = endQuoteChar
+        self.endQuoteCharLen = len(endQuoteChar)
+        self.escChar = escChar
+        self.escQuote = escQuote
+        self.unquoteResults = unquoteResults
+        self.convertWhitespaceEscapes = convertWhitespaceEscapes
+
+        if multiline:
+            self.flags = re.MULTILINE | re.DOTALL
+            self.pattern = r'%s(?:[^%s%s]' % (re.escape(self.quoteChar),
+                                              _escapeRegexRangeChars(self.endQuoteChar[0]),
+                                              (escChar is not None and _escapeRegexRangeChars(escChar) or ''))
+        else:
+            self.flags = 0
+            self.pattern = r'%s(?:[^%s\n\r%s]' % (re.escape(self.quoteChar),
+                                                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                                                  (escChar is not None and _escapeRegexRangeChars(escChar) or ''))
+        if len(self.endQuoteChar) > 1:
+            self.pattern += (
+                '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]),
+                                                   _escapeRegexRangeChars(self.endQuoteChar[i]))
+                                      for i in range(len(self.endQuoteChar) - 1, 0, -1)) + ')')
+
+        if escQuote:
+            self.pattern += (r'|(?:%s)' % re.escape(escQuote))
+        if escChar:
+            self.pattern += (r'|(?:%s.)' % re.escape(escChar))
+            self.escCharReplacePattern = re.escape(self.escChar) + "(.)"
+        self.pattern += (r')*%s' % re.escape(self.endQuoteChar))
+
+        try:
+            self.re = re.compile(self.pattern, self.flags)
+            self.reString = self.pattern
+            self.re_match = self.re.match
+        except sre_constants.error:
+            warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern,
+                          SyntaxWarning, stacklevel=2)
+            raise
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def parseImpl(self, instring, loc, doActions=True):
+        result = instring[loc] == self.firstQuoteChar and self.re_match(instring, loc) or None
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result.group()
+
+        if self.unquoteResults:
+
+            # strip off quotes
+            ret = ret[self.quoteCharLen: -self.endQuoteCharLen]
+
+            if isinstance(ret, basestring):
+                # replace escaped whitespace
+                if '\\' in ret and self.convertWhitespaceEscapes:
+                    ws_map = {
+                        r'\t': '\t',
+                        r'\n': '\n',
+                        r'\f': '\f',
+                        r'\r': '\r',
+                    }
+                    for wslit, wschar in ws_map.items():
+                        ret = ret.replace(wslit, wschar)
+
+                # replace escaped characters
+                if self.escChar:
+                    ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret)
+
+                # replace escaped quotes
+                if self.escQuote:
+                    ret = ret.replace(self.escQuote, self.endQuoteChar)
+
+        return loc, ret
+
+    def __str__(self):
+        try:
+            return super(QuotedString, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar)
+
+        return self.strRepr
+
+
+class CharsNotIn(Token):
+    """Token for matching words composed of characters *not* in a given
+    set (will include whitespace in matched characters if not listed in
+    the provided exclusion set - see example). Defined with string
+    containing all disallowed characters, and an optional minimum,
+    maximum, and/or exact length.  The default value for ``min`` is
+    1 (a minimum value < 1 is not valid); the default values for
+    ``max`` and ``exact`` are 0, meaning no maximum or exact
+    length restriction.
+
+    Example::
+
+        # define a comma-separated-value as anything that is not a ','
+        csv_value = CharsNotIn(',')
+        print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213"))
+
+    prints::
+
+        ['dkls', 'lsdkjf', 's12 34', '@!#', '213']
+    """
+    def __init__(self, notChars, min=1, max=0, exact=0):
+        super(CharsNotIn, self).__init__()
+        self.skipWhitespace = False
+        self.notChars = notChars
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use "
+                             "Optional(CharsNotIn()) if zero-length char group is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = (self.minLen == 0)
+        self.mayIndexError = False
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc] in self.notChars:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        notchars = self.notChars
+        maxlen = min(start + self.maxLen, len(instring))
+        while loc < maxlen and instring[loc] not in notchars:
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__(self):
+        try:
+            return super(CharsNotIn, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            if len(self.notChars) > 4:
+                self.strRepr = "!W:(%s...)" % self.notChars[:4]
+            else:
+                self.strRepr = "!W:(%s)" % self.notChars
+
+        return self.strRepr
+
+class White(Token):
+    """Special matching class for matching whitespace.  Normally,
+    whitespace is ignored by pyparsing grammars.  This class is included
+    when some whitespace structures are significant.  Define with
+    a string containing the whitespace characters to be matched; default
+    is ``" \\t\\r\\n"``.  Also takes optional ``min``,
+    ``max``, and ``exact`` arguments, as defined for the
+    :class:`Word` class.
+    """
+    whiteStrs = {
+        ' ' : '<SP>',
+        '\t': '<TAB>',
+        '\n': '<LF>',
+        '\r': '<CR>',
+        '\f': '<FF>',
+        u'\u00A0': '<NBSP>',
+        u'\u1680': '<OGHAM_SPACE_MARK>',
+        u'\u180E': '<MONGOLIAN_VOWEL_SEPARATOR>',
+        u'\u2000': '<EN_QUAD>',
+        u'\u2001': '<EM_QUAD>',
+        u'\u2002': '<EN_SPACE>',
+        u'\u2003': '<EM_SPACE>',
+        u'\u2004': '<THREE-PER-EM_SPACE>',
+        u'\u2005': '<FOUR-PER-EM_SPACE>',
+        u'\u2006': '<SIX-PER-EM_SPACE>',
+        u'\u2007': '<FIGURE_SPACE>',
+        u'\u2008': '<PUNCTUATION_SPACE>',
+        u'\u2009': '<THIN_SPACE>',
+        u'\u200A': '<HAIR_SPACE>',
+        u'\u200B': '<ZERO_WIDTH_SPACE>',
+        u'\u202F': '<NNBSP>',
+        u'\u205F': '<MMSP>',
+        u'\u3000': '<IDEOGRAPHIC_SPACE>',
+        }
+    def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0):
+        super(White, self).__init__()
+        self.matchWhite = ws
+        self.setWhitespaceChars("".join(c for c in self.whiteChars if c not in self.matchWhite))
+        # ~ self.leaveWhitespace()
+        self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite))
+        self.mayReturnEmpty = True
+        self.errmsg = "Expected " + self.name
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc] not in self.matchWhite:
+            raise ParseException(instring, loc, self.errmsg, self)
+        start = loc
+        loc += 1
+        maxloc = start + self.maxLen
+        maxloc = min(maxloc, len(instring))
+        while loc < maxloc and instring[loc] in self.matchWhite:
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+
+class _PositionToken(Token):
+    def __init__(self):
+        super(_PositionToken, self).__init__()
+        self.name = self.__class__.__name__
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+class GoToColumn(_PositionToken):
+    """Token to advance to a specific column of input text; useful for
+    tabular report scraping.
+    """
+    def __init__(self, colno):
+        super(GoToColumn, self).__init__()
+        self.col = colno
+
+    def preParse(self, instring, loc):
+        if col(loc, instring) != self.col:
+            instrlen = len(instring)
+            if self.ignoreExprs:
+                loc = self._skipIgnorables(instring, loc)
+            while loc < instrlen and instring[loc].isspace() and col(loc, instring) != self.col:
+                loc += 1
+        return loc
+
+    def parseImpl(self, instring, loc, doActions=True):
+        thiscol = col(loc, instring)
+        if thiscol > self.col:
+            raise ParseException(instring, loc, "Text not in expected column", self)
+        newloc = loc + self.col - thiscol
+        ret = instring[loc: newloc]
+        return newloc, ret
+
+
+class LineStart(_PositionToken):
+    r"""Matches if current position is at the beginning of a line within
+    the parse string
+
+    Example::
+
+        test = '''\
+        AAA this line
+        AAA and this line
+          AAA but not this one
+        B AAA and definitely not this one
+        '''
+
+        for t in (LineStart() + 'AAA' + restOfLine).searchString(test):
+            print(t)
+
+    prints::
+
+        ['AAA', ' this line']
+        ['AAA', ' and this line']
+
+    """
+    def __init__(self):
+        super(LineStart, self).__init__()
+        self.errmsg = "Expected start of line"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if col(loc, instring) == 1:
+            return loc, []
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class LineEnd(_PositionToken):
+    """Matches if current position is at the end of a line within the
+    parse string
+    """
+    def __init__(self):
+        super(LineEnd, self).__init__()
+        self.setWhitespaceChars(ParserElement.DEFAULT_WHITE_CHARS.replace("\n", ""))
+        self.errmsg = "Expected end of line"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if loc < len(instring):
+            if instring[loc] == "\n":
+                return loc + 1, "\n"
+            else:
+                raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc + 1, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class StringStart(_PositionToken):
+    """Matches if current position is at the beginning of the parse
+    string
+    """
+    def __init__(self):
+        super(StringStart, self).__init__()
+        self.errmsg = "Expected start of text"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if loc != 0:
+            # see if entire string up to here is just whitespace and ignoreables
+            if loc != self.preParse(instring, 0):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class StringEnd(_PositionToken):
+    """Matches if current position is at the end of the parse string
+    """
+    def __init__(self):
+        super(StringEnd, self).__init__()
+        self.errmsg = "Expected end of text"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if loc < len(instring):
+            raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc + 1, []
+        elif loc > len(instring):
+            return loc, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class WordStart(_PositionToken):
+    """Matches if the current position is at the beginning of a Word,
+    and is not preceded by any character in a given set of
+    ``wordChars`` (default= ``printables``). To emulate the
+    ``\b`` behavior of regular expressions, use
+    ``WordStart(alphanums)``. ``WordStart`` will also match at
+    the beginning of the string being parsed, or at the beginning of
+    a line.
+    """
+    def __init__(self, wordChars=printables):
+        super(WordStart, self).__init__()
+        self.wordChars = set(wordChars)
+        self.errmsg = "Not at the start of a word"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if loc != 0:
+            if (instring[loc - 1] in self.wordChars
+                    or instring[loc] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class WordEnd(_PositionToken):
+    """Matches if the current position is at the end of a Word, and is
+    not followed by any character in a given set of ``wordChars``
+    (default= ``printables``). To emulate the ``\b`` behavior of
+    regular expressions, use ``WordEnd(alphanums)``. ``WordEnd``
+    will also match at the end of the string being parsed, or at the end
+    of a line.
+    """
+    def __init__(self, wordChars=printables):
+        super(WordEnd, self).__init__()
+        self.wordChars = set(wordChars)
+        self.skipWhitespace = False
+        self.errmsg = "Not at the end of a word"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        instrlen = len(instring)
+        if instrlen > 0 and loc < instrlen:
+            if (instring[loc] in self.wordChars or
+                    instring[loc - 1] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+
+class ParseExpression(ParserElement):
+    """Abstract subclass of ParserElement, for combining and
+    post-processing parsed tokens.
+    """
+    def __init__(self, exprs, savelist=False):
+        super(ParseExpression, self).__init__(savelist)
+        if isinstance(exprs, _generatorType):
+            exprs = list(exprs)
+
+        if isinstance(exprs, basestring):
+            self.exprs = [self._literalStringClass(exprs)]
+        elif isinstance(exprs, ParserElement):
+            self.exprs = [exprs]
+        elif isinstance(exprs, Iterable):
+            exprs = list(exprs)
+            # if sequence of strings provided, wrap with Literal
+            if any(isinstance(expr, basestring) for expr in exprs):
+                exprs = (self._literalStringClass(e) if isinstance(e, basestring) else e for e in exprs)
+            self.exprs = list(exprs)
+        else:
+            try:
+                self.exprs = list(exprs)
+            except TypeError:
+                self.exprs = [exprs]
+        self.callPreparse = False
+
+    def append(self, other):
+        self.exprs.append(other)
+        self.strRepr = None
+        return self
+
+    def leaveWhitespace(self):
+        """Extends ``leaveWhitespace`` defined in base class, and also invokes ``leaveWhitespace`` on
+           all contained expressions."""
+        self.skipWhitespace = False
+        self.exprs = [e.copy() for e in self.exprs]
+        for e in self.exprs:
+            e.leaveWhitespace()
+        return self
+
+    def ignore(self, other):
+        if isinstance(other, Suppress):
+            if other not in self.ignoreExprs:
+                super(ParseExpression, self).ignore(other)
+                for e in self.exprs:
+                    e.ignore(self.ignoreExprs[-1])
+        else:
+            super(ParseExpression, self).ignore(other)
+            for e in self.exprs:
+                e.ignore(self.ignoreExprs[-1])
+        return self
+
+    def __str__(self):
+        try:
+            return super(ParseExpression, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "%s:(%s)" % (self.__class__.__name__, _ustr(self.exprs))
+        return self.strRepr
+
+    def streamline(self):
+        super(ParseExpression, self).streamline()
+
+        for e in self.exprs:
+            e.streamline()
+
+        # collapse nested And's of the form And(And(And(a, b), c), d) to And(a, b, c, d)
+        # but only if there are no parse actions or resultsNames on the nested And's
+        # (likewise for Or's and MatchFirst's)
+        if len(self.exprs) == 2:
+            other = self.exprs[0]
+            if (isinstance(other, self.__class__)
+                    and not other.parseAction
+                    and other.resultsName is None
+                    and not other.debug):
+                self.exprs = other.exprs[:] + [self.exprs[1]]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+            other = self.exprs[-1]
+            if (isinstance(other, self.__class__)
+                    and not other.parseAction
+                    and other.resultsName is None
+                    and not other.debug):
+                self.exprs = self.exprs[:-1] + other.exprs[:]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+        self.errmsg = "Expected " + _ustr(self)
+
+        return self
+
+    def validate(self, validateTrace=None):
+        tmp = (validateTrace if validateTrace is not None else [])[:] + [self]
+        for e in self.exprs:
+            e.validate(tmp)
+        self.checkRecursion([])
+
+    def copy(self):
+        ret = super(ParseExpression, self).copy()
+        ret.exprs = [e.copy() for e in self.exprs]
+        return ret
+
+    def _setResultsName(self, name, listAllMatches=False):
+        if __diag__.warn_ungrouped_named_tokens_in_collection:
+            for e in self.exprs:
+                if isinstance(e, ParserElement) and e.resultsName:
+                    warnings.warn("{0}: setting results name {1!r} on {2} expression "
+                                  "collides with {3!r} on contained expression".format("warn_ungrouped_named_tokens_in_collection",
+                                                                                       name,
+                                                                                       type(self).__name__,
+                                                                                       e.resultsName),
+                                  stacklevel=3)
+
+        return super(ParseExpression, self)._setResultsName(name, listAllMatches)
+
+
+class And(ParseExpression):
+    """
+    Requires all given :class:`ParseExpression` s to be found in the given order.
+    Expressions may be separated by whitespace.
+    May be constructed using the ``'+'`` operator.
+    May also be constructed using the ``'-'`` operator, which will
+    suppress backtracking.
+
+    Example::
+
+        integer = Word(nums)
+        name_expr = OneOrMore(Word(alphas))
+
+        expr = And([integer("id"), name_expr("name"), integer("age")])
+        # more easily written as:
+        expr = integer("id") + name_expr("name") + integer("age")
+    """
+
+    class _ErrorStop(Empty):
+        def __init__(self, *args, **kwargs):
+            super(And._ErrorStop, self).__init__(*args, **kwargs)
+            self.name = '-'
+            self.leaveWhitespace()
+
+    def __init__(self, exprs, savelist=True):
+        exprs = list(exprs)
+        if exprs and Ellipsis in exprs:
+            tmp = []
+            for i, expr in enumerate(exprs):
+                if expr is Ellipsis:
+                    if i < len(exprs) - 1:
+                        skipto_arg = (Empty() + exprs[i + 1]).exprs[-1]
+                        tmp.append(SkipTo(skipto_arg)("_skipped*"))
+                    else:
+                        raise Exception("cannot construct And with sequence ending in ...")
+                else:
+                    tmp.append(expr)
+            exprs[:] = tmp
+        super(And, self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.setWhitespaceChars(self.exprs[0].whiteChars)
+        self.skipWhitespace = self.exprs[0].skipWhitespace
+        self.callPreparse = True
+
+    def streamline(self):
+        # collapse any _PendingSkip's
+        if self.exprs:
+            if any(isinstance(e, ParseExpression) and e.exprs and isinstance(e.exprs[-1], _PendingSkip)
+                   for e in self.exprs[:-1]):
+                for i, e in enumerate(self.exprs[:-1]):
+                    if e is None:
+                        continue
+                    if (isinstance(e, ParseExpression)
+                            and e.exprs and isinstance(e.exprs[-1], _PendingSkip)):
+                        e.exprs[-1] = e.exprs[-1] + self.exprs[i + 1]
+                        self.exprs[i + 1] = None
+                self.exprs = [e for e in self.exprs if e is not None]
+
+        super(And, self).streamline()
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        return self
+
+    def parseImpl(self, instring, loc, doActions=True):
+        # pass False as last arg to _parse for first element, since we already
+        # pre-parsed the string as part of our And pre-parsing
+        loc, resultlist = self.exprs[0]._parse(instring, loc, doActions, callPreParse=False)
+        errorStop = False
+        for e in self.exprs[1:]:
+            if isinstance(e, And._ErrorStop):
+                errorStop = True
+                continue
+            if errorStop:
+                try:
+                    loc, exprtokens = e._parse(instring, loc, doActions)
+                except ParseSyntaxException:
+                    raise
+                except ParseBaseException as pe:
+                    pe.__traceback__ = None
+                    raise ParseSyntaxException._from_exception(pe)
+                except IndexError:
+                    raise ParseSyntaxException(instring, len(instring), self.errmsg, self)
+            else:
+                loc, exprtokens = e._parse(instring, loc, doActions)
+            if exprtokens or exprtokens.haskeys():
+                resultlist += exprtokens
+        return loc, resultlist
+
+    def __iadd__(self, other):
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        return self.append(other)  # And([self, other])
+
+    def checkRecursion(self, parseElementList):
+        subRecCheckList = parseElementList[:] + [self]
+        for e in self.exprs:
+            e.checkRecursion(subRecCheckList)
+            if not e.mayReturnEmpty:
+                break
+
+    def __str__(self):
+        if hasattr(self, "name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+
+class Or(ParseExpression):
+    """Requires that at least one :class:`ParseExpression` is found. If
+    two expressions match, the expression that matches the longest
+    string will be used. May be constructed using the ``'^'``
+    operator.
+
+    Example::
+
+        # construct Or using '^' operator
+
+        number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789"))
+
+    prints::
+
+        [['123'], ['3.1416'], ['789']]
+    """
+    def __init__(self, exprs, savelist=False):
+        super(Or, self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def streamline(self):
+        super(Or, self).streamline()
+        if __compat__.collect_all_And_tokens:
+            self.saveAsList = any(e.saveAsList for e in self.exprs)
+        return self
+
+    def parseImpl(self, instring, loc, doActions=True):
+        maxExcLoc = -1
+        maxException = None
+        matches = []
+        for e in self.exprs:
+            try:
+                loc2 = e.tryParse(instring, loc)
+            except ParseException as err:
+                err.__traceback__ = None
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring, len(instring), e.errmsg, self)
+                    maxExcLoc = len(instring)
+            else:
+                # save match among all matches, to retry longest to shortest
+                matches.append((loc2, e))
+
+        if matches:
+            # re-evaluate all matches in descending order of length of match, in case attached actions
+            # might change whether or how much they match of the input.
+            matches.sort(key=itemgetter(0), reverse=True)
+
+            if not doActions:
+                # no further conditions or parse actions to change the selection of
+                # alternative, so the first match will be the best match
+                best_expr = matches[0][1]
+                return best_expr._parse(instring, loc, doActions)
+
+            longest = -1, None
+            for loc1, expr1 in matches:
+                if loc1 <= longest[0]:
+                    # already have a longer match than this one will deliver, we are done
+                    return longest
+
+                try:
+                    loc2, toks = expr1._parse(instring, loc, doActions)
+                except ParseException as err:
+                    err.__traceback__ = None
+                    if err.loc > maxExcLoc:
+                        maxException = err
+                        maxExcLoc = err.loc
+                else:
+                    if loc2 >= loc1:
+                        return loc2, toks
+                    # didn't match as much as before
+                    elif loc2 > longest[0]:
+                        longest = loc2, toks
+
+            if longest != (-1, None):
+                return longest
+
+        if maxException is not None:
+            maxException.msg = self.errmsg
+            raise maxException
+        else:
+            raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+
+    def __ixor__(self, other):
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        return self.append(other)  # Or([self, other])
+
+    def __str__(self):
+        if hasattr(self, "name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion(self, parseElementList):
+        subRecCheckList = parseElementList[:] + [self]
+        for e in self.exprs:
+            e.checkRecursion(subRecCheckList)
+
+    def _setResultsName(self, name, listAllMatches=False):
+        if (not __compat__.collect_all_And_tokens
+                and __diag__.warn_multiple_tokens_in_named_alternation):
+            if any(isinstance(e, And) for e in self.exprs):
+                warnings.warn("{0}: setting results name {1!r} on {2} expression "
+                              "may only return a single token for an And alternative, "
+                              "in future will return the full list of tokens".format(
+                    "warn_multiple_tokens_in_named_alternation", name, type(self).__name__),
+                    stacklevel=3)
+
+        return super(Or, self)._setResultsName(name, listAllMatches)
+
+
+class MatchFirst(ParseExpression):
+    """Requires that at least one :class:`ParseExpression` is found. If
+    two expressions match, the first one listed is the one that will
+    match. May be constructed using the ``'|'`` operator.
+
+    Example::
+
+        # construct MatchFirst using '|' operator
+
+        # watch the order of expressions to match
+        number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]
+
+        # put more selective expression first
+        number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)
+        print(number.searchString("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]
+    """
+    def __init__(self, exprs, savelist=False):
+        super(MatchFirst, self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def streamline(self):
+        super(MatchFirst, self).streamline()
+        if __compat__.collect_all_And_tokens:
+            self.saveAsList = any(e.saveAsList for e in self.exprs)
+        return self
+
+    def parseImpl(self, instring, loc, doActions=True):
+        maxExcLoc = -1
+        maxException = None
+        for e in self.exprs:
+            try:
+                ret = e._parse(instring, loc, doActions)
+                return ret
+            except ParseException as err:
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring, len(instring), e.errmsg, self)
+                    maxExcLoc = len(instring)
+
+        # only got here if no expression matched, raise exception for match that made it the furthest
+        else:
+            if maxException is not None:
+                maxException.msg = self.errmsg
+                raise maxException
+            else:
+                raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+    def __ior__(self, other):
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        return self.append(other)  # MatchFirst([self, other])
+
+    def __str__(self):
+        if hasattr(self, "name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion(self, parseElementList):
+        subRecCheckList = parseElementList[:] + [self]
+        for e in self.exprs:
+            e.checkRecursion(subRecCheckList)
+
+    def _setResultsName(self, name, listAllMatches=False):
+        if (not __compat__.collect_all_And_tokens
+                and __diag__.warn_multiple_tokens_in_named_alternation):
+            if any(isinstance(e, And) for e in self.exprs):
+                warnings.warn("{0}: setting results name {1!r} on {2} expression "
+                              "may only return a single token for an And alternative, "
+                              "in future will return the full list of tokens".format(
+                    "warn_multiple_tokens_in_named_alternation", name, type(self).__name__),
+                    stacklevel=3)
+
+        return super(MatchFirst, self)._setResultsName(name, listAllMatches)
+
+
+class Each(ParseExpression):
+    """Requires all given :class:`ParseExpression` s to be found, but in
+    any order. Expressions may be separated by whitespace.
+
+    May be constructed using the ``'&'`` operator.
+
+    Example::
+
+        color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")
+        shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")
+        integer = Word(nums)
+        shape_attr = "shape:" + shape_type("shape")
+        posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")
+        color_attr = "color:" + color("color")
+        size_attr = "size:" + integer("size")
+
+        # use Each (using operator '&') to accept attributes in any order
+        # (shape and posn are required, color and size are optional)
+        shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr)
+
+        shape_spec.runTests('''
+            shape: SQUARE color: BLACK posn: 100, 120
+            shape: CIRCLE size: 50 color: BLUE posn: 50,80
+            color:GREEN size:20 shape:TRIANGLE posn:20,40
+            '''
+            )
+
+    prints::
+
+        shape: SQUARE color: BLACK posn: 100, 120
+        ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]
+        - color: BLACK
+        - posn: ['100', ',', '120']
+          - x: 100
+          - y: 120
+        - shape: SQUARE
+
+
+        shape: CIRCLE size: 50 color: BLUE posn: 50,80
+        ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]
+        - color: BLUE
+        - posn: ['50', ',', '80']
+          - x: 50
+          - y: 80
+        - shape: CIRCLE
+        - size: 50
+
+
+        color: GREEN size: 20 shape: TRIANGLE posn: 20,40
+        ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]
+        - color: GREEN
+        - posn: ['20', ',', '40']
+          - x: 20
+          - y: 40
+        - shape: TRIANGLE
+        - size: 20
+    """
+    def __init__(self, exprs, savelist=True):
+        super(Each, self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.skipWhitespace = True
+        self.initExprGroups = True
+        self.saveAsList = True
+
+    def streamline(self):
+        super(Each, self).streamline()
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        return self
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if self.initExprGroups:
+            self.opt1map = dict((id(e.expr), e) for e in self.exprs if isinstance(e, Optional))
+            opt1 = [e.expr for e in self.exprs if isinstance(e, Optional)]
+            opt2 = [e for e in self.exprs if e.mayReturnEmpty and not isinstance(e, (Optional, Regex))]
+            self.optionals = opt1 + opt2
+            self.multioptionals = [e.expr for e in self.exprs if isinstance(e, ZeroOrMore)]
+            self.multirequired = [e.expr for e in self.exprs if isinstance(e, OneOrMore)]
+            self.required = [e for e in self.exprs if not isinstance(e, (Optional, ZeroOrMore, OneOrMore))]
+            self.required += self.multirequired
+            self.initExprGroups = False
+        tmpLoc = loc
+        tmpReqd = self.required[:]
+        tmpOpt  = self.optionals[:]
+        matchOrder = []
+
+        keepMatching = True
+        while keepMatching:
+            tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired
+            failed = []
+            for e in tmpExprs:
+                try:
+                    tmpLoc = e.tryParse(instring, tmpLoc)
+                except ParseException:
+                    failed.append(e)
+                else:
+                    matchOrder.append(self.opt1map.get(id(e), e))
+                    if e in tmpReqd:
+                        tmpReqd.remove(e)
+                    elif e in tmpOpt:
+                        tmpOpt.remove(e)
+            if len(failed) == len(tmpExprs):
+                keepMatching = False
+
+        if tmpReqd:
+            missing = ", ".join(_ustr(e) for e in tmpReqd)
+            raise ParseException(instring, loc, "Missing one or more required elements (%s)" % missing)
+
+        # add any unmatched Optionals, in case they have default values defined
+        matchOrder += [e for e in self.exprs if isinstance(e, Optional) and e.expr in tmpOpt]
+
+        resultlist = []
+        for e in matchOrder:
+            loc, results = e._parse(instring, loc, doActions)
+            resultlist.append(results)
+
+        finalResults = sum(resultlist, ParseResults([]))
+        return loc, finalResults
+
+    def __str__(self):
+        if hasattr(self, "name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion(self, parseElementList):
+        subRecCheckList = parseElementList[:] + [self]
+        for e in self.exprs:
+            e.checkRecursion(subRecCheckList)
+
+
+class ParseElementEnhance(ParserElement):
+    """Abstract subclass of :class:`ParserElement`, for combining and
+    post-processing parsed tokens.
+    """
+    def __init__(self, expr, savelist=False):
+        super(ParseElementEnhance, self).__init__(savelist)
+        if isinstance(expr, basestring):
+            if issubclass(self._literalStringClass, Token):
+                expr = self._literalStringClass(expr)
+            else:
+                expr = self._literalStringClass(Literal(expr))
+        self.expr = expr
+        self.strRepr = None
+        if expr is not None:
+            self.mayIndexError = expr.mayIndexError
+            self.mayReturnEmpty = expr.mayReturnEmpty
+            self.setWhitespaceChars(expr.whiteChars)
+            self.skipWhitespace = expr.skipWhitespace
+            self.saveAsList = expr.saveAsList
+            self.callPreparse = expr.callPreparse
+            self.ignoreExprs.extend(expr.ignoreExprs)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if self.expr is not None:
+            return self.expr._parse(instring, loc, doActions, callPreParse=False)
+        else:
+            raise ParseException("", loc, self.errmsg, self)
+
+    def leaveWhitespace(self):
+        self.skipWhitespace = False
+        self.expr = self.expr.copy()
+        if self.expr is not None:
+            self.expr.leaveWhitespace()
+        return self
+
+    def ignore(self, other):
+        if isinstance(other, Suppress):
+            if other not in self.ignoreExprs:
+                super(ParseElementEnhance, self).ignore(other)
+                if self.expr is not None:
+                    self.expr.ignore(self.ignoreExprs[-1])
+        else:
+            super(ParseElementEnhance, self).ignore(other)
+            if self.expr is not None:
+                self.expr.ignore(self.ignoreExprs[-1])
+        return self
+
+    def streamline(self):
+        super(ParseElementEnhance, self).streamline()
+        if self.expr is not None:
+            self.expr.streamline()
+        return self
+
+    def checkRecursion(self, parseElementList):
+        if self in parseElementList:
+            raise RecursiveGrammarException(parseElementList + [self])
+        subRecCheckList = parseElementList[:] + [self]
+        if self.expr is not None:
+            self.expr.checkRecursion(subRecCheckList)
+
+    def validate(self, validateTrace=None):
+        if validateTrace is None:
+            validateTrace = []
+        tmp = validateTrace[:] + [self]
+        if self.expr is not None:
+            self.expr.validate(tmp)
+        self.checkRecursion([])
+
+    def __str__(self):
+        try:
+            return super(ParseElementEnhance, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None and self.expr is not None:
+            self.strRepr = "%s:(%s)" % (self.__class__.__name__, _ustr(self.expr))
+        return self.strRepr
+
+
+class FollowedBy(ParseElementEnhance):
+    """Lookahead matching of the given parse expression.
+    ``FollowedBy`` does *not* advance the parsing position within
+    the input string, it only verifies that the specified parse
+    expression matches at the current position.  ``FollowedBy``
+    always returns a null token list. If any results names are defined
+    in the lookahead expression, those *will* be returned for access by
+    name.
+
+    Example::
+
+        # use FollowedBy to match a label only if it is followed by a ':'
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+
+        OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint()
+
+    prints::
+
+        [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]
+    """
+    def __init__(self, expr):
+        super(FollowedBy, self).__init__(expr)
+        self.mayReturnEmpty = True
+
+    def parseImpl(self, instring, loc, doActions=True):
+        # by using self._expr.parse and deleting the contents of the returned ParseResults list
+        # we keep any named results that were defined in the FollowedBy expression
+        _, ret = self.expr._parse(instring, loc, doActions=doActions)
+        del ret[:]
+
+        return loc, ret
+
+
+class PrecededBy(ParseElementEnhance):
+    """Lookbehind matching of the given parse expression.
+    ``PrecededBy`` does not advance the parsing position within the
+    input string, it only verifies that the specified parse expression
+    matches prior to the current position.  ``PrecededBy`` always
+    returns a null token list, but if a results name is defined on the
+    given expression, it is returned.
+
+    Parameters:
+
+     - expr - expression that must match prior to the current parse
+       location
+     - retreat - (default= ``None``) - (int) maximum number of characters
+       to lookbehind prior to the current parse location
+
+    If the lookbehind expression is a string, Literal, Keyword, or
+    a Word or CharsNotIn with a specified exact or maximum length, then
+    the retreat parameter is not required. Otherwise, retreat must be
+    specified to give a maximum number of characters to look back from
+    the current parse position for a lookbehind match.
+
+    Example::
+
+        # VB-style variable names with type prefixes
+        int_var = PrecededBy("#") + pyparsing_common.identifier
+        str_var = PrecededBy("$") + pyparsing_common.identifier
+
+    """
+    def __init__(self, expr, retreat=None):
+        super(PrecededBy, self).__init__(expr)
+        self.expr = self.expr().leaveWhitespace()
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.exact = False
+        if isinstance(expr, str):
+            retreat = len(expr)
+            self.exact = True
+        elif isinstance(expr, (Literal, Keyword)):
+            retreat = expr.matchLen
+            self.exact = True
+        elif isinstance(expr, (Word, CharsNotIn)) and expr.maxLen != _MAX_INT:
+            retreat = expr.maxLen
+            self.exact = True
+        elif isinstance(expr, _PositionToken):
+            retreat = 0
+            self.exact = True
+        self.retreat = retreat
+        self.errmsg = "not preceded by " + str(expr)
+        self.skipWhitespace = False
+        self.parseAction.append(lambda s, l, t: t.__delitem__(slice(None, None)))
+
+    def parseImpl(self, instring, loc=0, doActions=True):
+        if self.exact:
+            if loc < self.retreat:
+                raise ParseException(instring, loc, self.errmsg)
+            start = loc - self.retreat
+            _, ret = self.expr._parse(instring, start)
+        else:
+            # retreat specified a maximum lookbehind window, iterate
+            test_expr = self.expr + StringEnd()
+            instring_slice = instring[max(0, loc - self.retreat):loc]
+            last_expr = ParseException(instring, loc, self.errmsg)
+            for offset in range(1, min(loc, self.retreat + 1)+1):
+                try:
+                    # print('trying', offset, instring_slice, repr(instring_slice[loc - offset:]))
+                    _, ret = test_expr._parse(instring_slice, len(instring_slice) - offset)
+                except ParseBaseException as pbe:
+                    last_expr = pbe
+                else:
+                    break
+            else:
+                raise last_expr
+        return loc, ret
+
+
+class NotAny(ParseElementEnhance):
+    """Lookahead to disallow matching with the given parse expression.
+    ``NotAny`` does *not* advance the parsing position within the
+    input string, it only verifies that the specified parse expression
+    does *not* match at the current position.  Also, ``NotAny`` does
+    *not* skip over leading whitespace. ``NotAny`` always returns
+    a null token list.  May be constructed using the '~' operator.
+
+    Example::
+
+        AND, OR, NOT = map(CaselessKeyword, "AND OR NOT".split())
+
+        # take care not to mistake keywords for identifiers
+        ident = ~(AND | OR | NOT) + Word(alphas)
+        boolean_term = Optional(NOT) + ident
+
+        # very crude boolean expression - to support parenthesis groups and
+        # operation hierarchy, use infixNotation
+        boolean_expr = boolean_term + ZeroOrMore((AND | OR) + boolean_term)
+
+        # integers that are followed by "." are actually floats
+        integer = Word(nums) + ~Char(".")
+    """
+    def __init__(self, expr):
+        super(NotAny, self).__init__(expr)
+        # ~ self.leaveWhitespace()
+        self.skipWhitespace = False  # do NOT use self.leaveWhitespace(), don't want to propagate to exprs
+        self.mayReturnEmpty = True
+        self.errmsg = "Found unwanted token, " + _ustr(self.expr)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if self.expr.canParseNext(instring, loc):
+            raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+    def __str__(self):
+        if hasattr(self, "name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "~{" + _ustr(self.expr) + "}"
+
+        return self.strRepr
+
+class _MultipleMatch(ParseElementEnhance):
+    def __init__(self, expr, stopOn=None):
+        super(_MultipleMatch, self).__init__(expr)
+        self.saveAsList = True
+        ender = stopOn
+        if isinstance(ender, basestring):
+            ender = self._literalStringClass(ender)
+        self.stopOn(ender)
+
+    def stopOn(self, ender):
+        if isinstance(ender, basestring):
+            ender = self._literalStringClass(ender)
+        self.not_ender = ~ender if ender is not None else None
+        return self
+
+    def parseImpl(self, instring, loc, doActions=True):
+        self_expr_parse = self.expr._parse
+        self_skip_ignorables = self._skipIgnorables
+        check_ender = self.not_ender is not None
+        if check_ender:
+            try_not_ender = self.not_ender.tryParse
+
+        # must be at least one (but first see if we are the stopOn sentinel;
+        # if so, fail)
+        if check_ender:
+            try_not_ender(instring, loc)
+        loc, tokens = self_expr_parse(instring, loc, doActions, callPreParse=False)
+        try:
+            hasIgnoreExprs = (not not self.ignoreExprs)
+            while 1:
+                if check_ender:
+                    try_not_ender(instring, loc)
+                if hasIgnoreExprs:
+                    preloc = self_skip_ignorables(instring, loc)
+                else:
+                    preloc = loc
+                loc, tmptokens = self_expr_parse(instring, preloc, doActions)
+                if tmptokens or tmptokens.haskeys():
+                    tokens += tmptokens
+        except (ParseException, IndexError):
+            pass
+
+        return loc, tokens
+
+    def _setResultsName(self, name, listAllMatches=False):
+        if __diag__.warn_ungrouped_named_tokens_in_collection:
+            for e in [self.expr] + getattr(self.expr, 'exprs', []):
+                if isinstance(e, ParserElement) and e.resultsName:
+                    warnings.warn("{0}: setting results name {1!r} on {2} expression "
+                                  "collides with {3!r} on contained expression".format("warn_ungrouped_named_tokens_in_collection",
+                                                                                       name,
+                                                                                       type(self).__name__,
+                                                                                       e.resultsName),
+                                  stacklevel=3)
+
+        return super(_MultipleMatch, self)._setResultsName(name, listAllMatches)
+
+
+class OneOrMore(_MultipleMatch):
+    """Repetition of one or more of the given expression.
+
+    Parameters:
+     - expr - expression that must match one or more times
+     - stopOn - (default= ``None``) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition
+          expression)
+
+    Example::
+
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: BLACK"
+        OneOrMore(attr_expr).parseString(text).pprint()  # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]
+
+        # use stopOn attribute for OneOrMore to avoid reading label string as part of the data
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]
+
+        # could also be written as
+        (attr_expr * (1,)).parseString(text).pprint()
+    """
+
+    def __str__(self):
+        if hasattr(self, "name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + _ustr(self.expr) + "}..."
+
+        return self.strRepr
+
+class ZeroOrMore(_MultipleMatch):
+    """Optional repetition of zero or more of the given expression.
+
+    Parameters:
+     - expr - expression that must match zero or more times
+     - stopOn - (default= ``None``) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition
+          expression)
+
+    Example: similar to :class:`OneOrMore`
+    """
+    def __init__(self, expr, stopOn=None):
+        super(ZeroOrMore, self).__init__(expr, stopOn=stopOn)
+        self.mayReturnEmpty = True
+
+    def parseImpl(self, instring, loc, doActions=True):
+        try:
+            return super(ZeroOrMore, self).parseImpl(instring, loc, doActions)
+        except (ParseException, IndexError):
+            return loc, []
+
+    def __str__(self):
+        if hasattr(self, "name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]..."
+
+        return self.strRepr
+
+
+class _NullToken(object):
+    def __bool__(self):
+        return False
+    __nonzero__ = __bool__
+    def __str__(self):
+        return ""
+
+class Optional(ParseElementEnhance):
+    """Optional matching of the given expression.
+
+    Parameters:
+     - expr - expression that must match zero or more times
+     - default (optional) - value to be returned if the optional expression is not found.
+
+    Example::
+
+        # US postal code can be a 5-digit zip, plus optional 4-digit qualifier
+        zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4)))
+        zip.runTests('''
+            # traditional ZIP code
+            12345
+
+            # ZIP+4 form
+            12101-0001
+
+            # invalid ZIP
+            98765-
+            ''')
+
+    prints::
+
+        # traditional ZIP code
+        12345
+        ['12345']
+
+        # ZIP+4 form
+        12101-0001
+        ['12101-0001']
+
+        # invalid ZIP
+        98765-
+             ^
+        FAIL: Expected end of text (at char 5), (line:1, col:6)
+    """
+    __optionalNotMatched = _NullToken()
+
+    def __init__(self, expr, default=__optionalNotMatched):
+        super(Optional, self).__init__(expr, savelist=False)
+        self.saveAsList = self.expr.saveAsList
+        self.defaultValue = default
+        self.mayReturnEmpty = True
+
+    def parseImpl(self, instring, loc, doActions=True):
+        try:
+            loc, tokens = self.expr._parse(instring, loc, doActions, callPreParse=False)
+        except (ParseException, IndexError):
+            if self.defaultValue is not self.__optionalNotMatched:
+                if self.expr.resultsName:
+                    tokens = ParseResults([self.defaultValue])
+                    tokens[self.expr.resultsName] = self.defaultValue
+                else:
+                    tokens = [self.defaultValue]
+            else:
+                tokens = []
+        return loc, tokens
+
+    def __str__(self):
+        if hasattr(self, "name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]"
+
+        return self.strRepr
+
+class SkipTo(ParseElementEnhance):
+    """Token for skipping over all undefined text until the matched
+    expression is found.
+
+    Parameters:
+     - expr - target expression marking the end of the data to be skipped
+     - include - (default= ``False``) if True, the target expression is also parsed
+          (the skipped text and target expression are returned as a 2-element list).
+     - ignore - (default= ``None``) used to define grammars (typically quoted strings and
+          comments) that might contain false matches to the target expression
+     - failOn - (default= ``None``) define expressions that are not allowed to be
+          included in the skipped test; if found before the target expression is found,
+          the SkipTo is not a match
+
+    Example::
+
+        report = '''
+            Outstanding Issues Report - 1 Jan 2000
+
+               # | Severity | Description                               |  Days Open
+            -----+----------+-------------------------------------------+-----------
+             101 | Critical | Intermittent system crash                 |          6
+              94 | Cosmetic | Spelling error on Login ('log|n')         |         14
+              79 | Minor    | System slow when running too many reports |         47
+            '''
+        integer = Word(nums)
+        SEP = Suppress('|')
+        # use SkipTo to simply match everything up until the next SEP
+        # - ignore quoted strings, so that a '|' character inside a quoted string does not match
+        # - parse action will call token.strip() for each matched token, i.e., the description body
+        string_data = SkipTo(SEP, ignore=quotedString)
+        string_data.setParseAction(tokenMap(str.strip))
+        ticket_expr = (integer("issue_num") + SEP
+                      + string_data("sev") + SEP
+                      + string_data("desc") + SEP
+                      + integer("days_open"))
+
+        for tkt in ticket_expr.searchString(report):
+            print tkt.dump()
+
+    prints::
+
+        ['101', 'Critical', 'Intermittent system crash', '6']
+        - days_open: 6
+        - desc: Intermittent system crash
+        - issue_num: 101
+        - sev: Critical
+        ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']
+        - days_open: 14
+        - desc: Spelling error on Login ('log|n')
+        - issue_num: 94
+        - sev: Cosmetic
+        ['79', 'Minor', 'System slow when running too many reports', '47']
+        - days_open: 47
+        - desc: System slow when running too many reports
+        - issue_num: 79
+        - sev: Minor
+    """
+    def __init__(self, other, include=False, ignore=None, failOn=None):
+        super(SkipTo, self).__init__(other)
+        self.ignoreExpr = ignore
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.includeMatch = include
+        self.saveAsList = False
+        if isinstance(failOn, basestring):
+            self.failOn = self._literalStringClass(failOn)
+        else:
+            self.failOn = failOn
+        self.errmsg = "No match found for " + _ustr(self.expr)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        startloc = loc
+        instrlen = len(instring)
+        expr = self.expr
+        expr_parse = self.expr._parse
+        self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None
+        self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None
+
+        tmploc = loc
+        while tmploc <= instrlen:
+            if self_failOn_canParseNext is not None:
+                # break if failOn expression matches
+                if self_failOn_canParseNext(instring, tmploc):
+                    break
+
+            if self_ignoreExpr_tryParse is not None:
+                # advance past ignore expressions
+                while 1:
+                    try:
+                        tmploc = self_ignoreExpr_tryParse(instring, tmploc)
+                    except ParseBaseException:
+                        break
+
+            try:
+                expr_parse(instring, tmploc, doActions=False, callPreParse=False)
+            except (ParseException, IndexError):
+                # no match, advance loc in string
+                tmploc += 1
+            else:
+                # matched skipto expr, done
+                break
+
+        else:
+            # ran off the end of the input string without matching skipto expr, fail
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        # build up return values
+        loc = tmploc
+        skiptext = instring[startloc:loc]
+        skipresult = ParseResults(skiptext)
+
+        if self.includeMatch:
+            loc, mat = expr_parse(instring, loc, doActions, callPreParse=False)
+            skipresult += mat
+
+        return loc, skipresult
+
+class Forward(ParseElementEnhance):
+    """Forward declaration of an expression to be defined later -
+    used for recursive grammars, such as algebraic infix notation.
+    When the expression is known, it is assigned to the ``Forward``
+    variable using the '<<' operator.
+
+    Note: take care when assigning to ``Forward`` not to overlook
+    precedence of operators.
+
+    Specifically, '|' has a lower precedence than '<<', so that::
+
+        fwdExpr << a | b | c
+
+    will actually be evaluated as::
+
+        (fwdExpr << a) | b | c
+
+    thereby leaving b and c out as parseable alternatives.  It is recommended that you
+    explicitly group the values inserted into the ``Forward``::
+
+        fwdExpr << (a | b | c)
+
+    Converting to use the '<<=' operator instead will avoid this problem.
+
+    See :class:`ParseResults.pprint` for an example of a recursive
+    parser created using ``Forward``.
+    """
+    def __init__(self, other=None):
+        super(Forward, self).__init__(other, savelist=False)
+
+    def __lshift__(self, other):
+        if isinstance(other, basestring):
+            other = self._literalStringClass(other)
+        self.expr = other
+        self.strRepr = None
+        self.mayIndexError = self.expr.mayIndexError
+        self.mayReturnEmpty = self.expr.mayReturnEmpty
+        self.setWhitespaceChars(self.expr.whiteChars)
+        self.skipWhitespace = self.expr.skipWhitespace
+        self.saveAsList = self.expr.saveAsList
+        self.ignoreExprs.extend(self.expr.ignoreExprs)
+        return self
+
+    def __ilshift__(self, other):
+        return self << other
+
+    def leaveWhitespace(self):
+        self.skipWhitespace = False
+        return self
+
+    def streamline(self):
+        if not self.streamlined:
+            self.streamlined = True
+            if self.expr is not None:
+                self.expr.streamline()
+        return self
+
+    def validate(self, validateTrace=None):
+        if validateTrace is None:
+            validateTrace = []
+
+        if self not in validateTrace:
+            tmp = validateTrace[:] + [self]
+            if self.expr is not None:
+                self.expr.validate(tmp)
+        self.checkRecursion([])
+
+    def __str__(self):
+        if hasattr(self, "name"):
+            return self.name
+        if self.strRepr is not None:
+            return self.strRepr
+
+        # Avoid infinite recursion by setting a temporary strRepr
+        self.strRepr = ": ..."
+
+        # Use the string representation of main expression.
+        retString = '...'
+        try:
+            if self.expr is not None:
+                retString = _ustr(self.expr)[:1000]
+            else:
+                retString = "None"
+        finally:
+            self.strRepr = self.__class__.__name__ + ": " + retString
+        return self.strRepr
+
+    def copy(self):
+        if self.expr is not None:
+            return super(Forward, self).copy()
+        else:
+            ret = Forward()
+            ret <<= self
+            return ret
+
+    def _setResultsName(self, name, listAllMatches=False):
+        if __diag__.warn_name_set_on_empty_Forward:
+            if self.expr is None:
+                warnings.warn("{0}: setting results name {0!r} on {1} expression "
+                              "that has no contained expression".format("warn_name_set_on_empty_Forward",
+                                                                        name,
+                                                                        type(self).__name__),
+                              stacklevel=3)
+
+        return super(Forward, self)._setResultsName(name, listAllMatches)
+
+class TokenConverter(ParseElementEnhance):
+    """
+    Abstract subclass of :class:`ParseExpression`, for converting parsed results.
+    """
+    def __init__(self, expr, savelist=False):
+        super(TokenConverter, self).__init__(expr)  # , savelist)
+        self.saveAsList = False
+
+class Combine(TokenConverter):
+    """Converter to concatenate all matching tokens to a single string.
+    By default, the matching patterns must also be contiguous in the
+    input string; this can be disabled by specifying
+    ``'adjacent=False'`` in the constructor.
+
+    Example::
+
+        real = Word(nums) + '.' + Word(nums)
+        print(real.parseString('3.1416')) # -> ['3', '.', '1416']
+        # will also erroneously match the following
+        print(real.parseString('3. 1416')) # -> ['3', '.', '1416']
+
+        real = Combine(Word(nums) + '.' + Word(nums))
+        print(real.parseString('3.1416')) # -> ['3.1416']
+        # no match when there are internal spaces
+        print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...)
+    """
+    def __init__(self, expr, joinString="", adjacent=True):
+        super(Combine, self).__init__(expr)
+        # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself
+        if adjacent:
+            self.leaveWhitespace()
+        self.adjacent = adjacent
+        self.skipWhitespace = True
+        self.joinString = joinString
+        self.callPreparse = True
+
+    def ignore(self, other):
+        if self.adjacent:
+            ParserElement.ignore(self, other)
+        else:
+            super(Combine, self).ignore(other)
+        return self
+
+    def postParse(self, instring, loc, tokenlist):
+        retToks = tokenlist.copy()
+        del retToks[:]
+        retToks += ParseResults(["".join(tokenlist._asStringList(self.joinString))], modal=self.modalResults)
+
+        if self.resultsName and retToks.haskeys():
+            return [retToks]
+        else:
+            return retToks
+
+class Group(TokenConverter):
+    """Converter to return the matched tokens as a list - useful for
+    returning tokens of :class:`ZeroOrMore` and :class:`OneOrMore` expressions.
+
+    Example::
+
+        ident = Word(alphas)
+        num = Word(nums)
+        term = ident | num
+        func = ident + Optional(delimitedList(term))
+        print(func.parseString("fn a, b, 100"))  # -> ['fn', 'a', 'b', '100']
+
+        func = ident + Group(Optional(delimitedList(term)))
+        print(func.parseString("fn a, b, 100"))  # -> ['fn', ['a', 'b', '100']]
+    """
+    def __init__(self, expr):
+        super(Group, self).__init__(expr)
+        self.saveAsList = True
+
+    def postParse(self, instring, loc, tokenlist):
+        return [tokenlist]
+
+class Dict(TokenConverter):
+    """Converter to return a repetitive expression as a list, but also
+    as a dictionary. Each element can also be referenced using the first
+    token in the expression as its key. Useful for tabular report
+    scraping when the first column can be used as a item key.
+
+    Example::
+
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+
+        # print attributes as plain groups
+        print(OneOrMore(attr_expr).parseString(text).dump())
+
+        # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names
+        result = Dict(OneOrMore(Group(attr_expr))).parseString(text)
+        print(result.dump())
+
+        # access named fields as dict entries, or output as dict
+        print(result['shape'])
+        print(result.asDict())
+
+    prints::
+
+        ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}
+
+    See more examples at :class:`ParseResults` of accessing fields by results name.
+    """
+    def __init__(self, expr):
+        super(Dict, self).__init__(expr)
+        self.saveAsList = True
+
+    def postParse(self, instring, loc, tokenlist):
+        for i, tok in enumerate(tokenlist):
+            if len(tok) == 0:
+                continue
+            ikey = tok[0]
+            if isinstance(ikey, int):
+                ikey = _ustr(tok[0]).strip()
+            if len(tok) == 1:
+                tokenlist[ikey] = _ParseResultsWithOffset("", i)
+            elif len(tok) == 2 and not isinstance(tok[1], ParseResults):
+                tokenlist[ikey] = _ParseResultsWithOffset(tok[1], i)
+            else:
+                dictvalue = tok.copy()  # ParseResults(i)
+                del dictvalue[0]
+                if len(dictvalue) != 1 or (isinstance(dictvalue, ParseResults) and dictvalue.haskeys()):
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue, i)
+                else:
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0], i)
+
+        if self.resultsName:
+            return [tokenlist]
+        else:
+            return tokenlist
+
+
+class Suppress(TokenConverter):
+    """Converter for ignoring the results of a parsed expression.
+
+    Example::
+
+        source = "a, b, c,d"
+        wd = Word(alphas)
+        wd_list1 = wd + ZeroOrMore(',' + wd)
+        print(wd_list1.parseString(source))
+
+        # often, delimiters that are useful during parsing are just in the
+        # way afterward - use Suppress to keep them out of the parsed output
+        wd_list2 = wd + ZeroOrMore(Suppress(',') + wd)
+        print(wd_list2.parseString(source))
+
+    prints::
+
+        ['a', ',', 'b', ',', 'c', ',', 'd']
+        ['a', 'b', 'c', 'd']
+
+    (See also :class:`delimitedList`.)
+    """
+    def postParse(self, instring, loc, tokenlist):
+        return []
+
+    def suppress(self):
+        return self
+
+
+class OnlyOnce(object):
+    """Wrapper for parse actions, to ensure they are only called once.
+    """
+    def __init__(self, methodCall):
+        self.callable = _trim_arity(methodCall)
+        self.called = False
+    def __call__(self, s, l, t):
+        if not self.called:
+            results = self.callable(s, l, t)
+            self.called = True
+            return results
+        raise ParseException(s, l, "")
+    def reset(self):
+        self.called = False
+
+def traceParseAction(f):
+    """Decorator for debugging parse actions.
+
+    When the parse action is called, this decorator will print
+    ``">> entering method-name(line:<current_source_line>, <parse_location>, <matched_tokens>)"``.
+    When the parse action completes, the decorator will print
+    ``"<<"`` followed by the returned value, or any exception that the parse action raised.
+
+    Example::
+
+        wd = Word(alphas)
+
+        @traceParseAction
+        def remove_duplicate_chars(tokens):
+            return ''.join(sorted(set(''.join(tokens))))
+
+        wds = OneOrMore(wd).setParseAction(remove_duplicate_chars)
+        print(wds.parseString("slkdjs sld sldd sdlf sdljf"))
+
+    prints::
+
+        >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))
+        <<leaving remove_duplicate_chars (ret: 'dfjkls')
+        ['dfjkls']
+    """
+    f = _trim_arity(f)
+    def z(*paArgs):
+        thisFunc = f.__name__
+        s, l, t = paArgs[-3:]
+        if len(paArgs) > 3:
+            thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc
+        sys.stderr.write(">>entering %s(line: '%s', %d, %r)\n" % (thisFunc, line(l, s), l, t))
+        try:
+            ret = f(*paArgs)
+        except Exception as exc:
+            sys.stderr.write("<<leaving %s (exception: %s)\n" % (thisFunc, exc))
+            raise
+        sys.stderr.write("<<leaving %s (ret: %r)\n" % (thisFunc, ret))
+        return ret
+    try:
+        z.__name__ = f.__name__
+    except AttributeError:
+        pass
+    return z
+
+#
+# global helpers
+#
+def delimitedList(expr, delim=",", combine=False):
+    """Helper to define a delimited list of expressions - the delimiter
+    defaults to ','. By default, the list elements and delimiters can
+    have intervening whitespace, and comments, but this can be
+    overridden by passing ``combine=True`` in the constructor. If
+    ``combine`` is set to ``True``, the matching tokens are
+    returned as a single token string, with the delimiters included;
+    otherwise, the matching tokens are returned as a list of tokens,
+    with the delimiters suppressed.
+
+    Example::
+
+        delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc']
+        delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']
+    """
+    dlName = _ustr(expr) + " [" + _ustr(delim) + " " + _ustr(expr) + "]..."
+    if combine:
+        return Combine(expr + ZeroOrMore(delim + expr)).setName(dlName)
+    else:
+        return (expr + ZeroOrMore(Suppress(delim) + expr)).setName(dlName)
+
+def countedArray(expr, intExpr=None):
+    """Helper to define a counted list of expressions.
+
+    This helper defines a pattern of the form::
+
+        integer expr expr expr...
+
+    where the leading integer tells how many expr expressions follow.
+    The matched tokens returns the array of expr tokens as a list - the
+    leading count token is suppressed.
+
+    If ``intExpr`` is specified, it should be a pyparsing expression
+    that produces an integer value.
+
+    Example::
+
+        countedArray(Word(alphas)).parseString('2 ab cd ef')  # -> ['ab', 'cd']
+
+        # in this parser, the leading integer value is given in binary,
+        # '10' indicating that 2 values are in the array
+        binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2))
+        countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef')  # -> ['ab', 'cd']
+    """
+    arrayExpr = Forward()
+    def countFieldParseAction(s, l, t):
+        n = t[0]
+        arrayExpr << (n and Group(And([expr] * n)) or Group(empty))
+        return []
+    if intExpr is None:
+        intExpr = Word(nums).setParseAction(lambda t: int(t[0]))
+    else:
+        intExpr = intExpr.copy()
+    intExpr.setName("arrayLen")
+    intExpr.addParseAction(countFieldParseAction, callDuringTry=True)
+    return (intExpr + arrayExpr).setName('(len) ' + _ustr(expr) + '...')
+
+def _flatten(L):
+    ret = []
+    for i in L:
+        if isinstance(i, list):
+            ret.extend(_flatten(i))
+        else:
+            ret.append(i)
+    return ret
+
+def matchPreviousLiteral(expr):
+    """Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks for
+    a 'repeat' of a previous expression.  For example::
+
+        first = Word(nums)
+        second = matchPreviousLiteral(first)
+        matchExpr = first + ":" + second
+
+    will match ``"1:1"``, but not ``"1:2"``.  Because this
+    matches a previous literal, will also match the leading
+    ``"1:1"`` in ``"1:10"``. If this is not desired, use
+    :class:`matchPreviousExpr`. Do *not* use with packrat parsing
+    enabled.
+    """
+    rep = Forward()
+    def copyTokenToRepeater(s, l, t):
+        if t:
+            if len(t) == 1:
+                rep << t[0]
+            else:
+                # flatten t tokens
+                tflat = _flatten(t.asList())
+                rep << And(Literal(tt) for tt in tflat)
+        else:
+            rep << Empty()
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def matchPreviousExpr(expr):
+    """Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks for
+    a 'repeat' of a previous expression.  For example::
+
+        first = Word(nums)
+        second = matchPreviousExpr(first)
+        matchExpr = first + ":" + second
+
+    will match ``"1:1"``, but not ``"1:2"``.  Because this
+    matches by expressions, will *not* match the leading ``"1:1"``
+    in ``"1:10"``; the expressions are evaluated first, and then
+    compared, so ``"1"`` is compared with ``"10"``. Do *not* use
+    with packrat parsing enabled.
+    """
+    rep = Forward()
+    e2 = expr.copy()
+    rep <<= e2
+    def copyTokenToRepeater(s, l, t):
+        matchTokens = _flatten(t.asList())
+        def mustMatchTheseTokens(s, l, t):
+            theseTokens = _flatten(t.asList())
+            if theseTokens != matchTokens:
+                raise ParseException('', 0, '')
+        rep.setParseAction(mustMatchTheseTokens, callDuringTry=True)
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def _escapeRegexRangeChars(s):
+    # ~  escape these chars: ^-[]
+    for c in r"\^-[]":
+        s = s.replace(c, _bslash + c)
+    s = s.replace("\n", r"\n")
+    s = s.replace("\t", r"\t")
+    return _ustr(s)
+
+def oneOf(strs, caseless=False, useRegex=True, asKeyword=False):
+    """Helper to quickly define a set of alternative Literals, and makes
+    sure to do longest-first testing when there is a conflict,
+    regardless of the input order, but returns
+    a :class:`MatchFirst` for best performance.
+
+    Parameters:
+
+     - strs - a string of space-delimited literals, or a collection of
+       string literals
+     - caseless - (default= ``False``) - treat all literals as
+       caseless
+     - useRegex - (default= ``True``) - as an optimization, will
+       generate a Regex object; otherwise, will generate
+       a :class:`MatchFirst` object (if ``caseless=True`` or ``asKeyword=True``, or if
+       creating a :class:`Regex` raises an exception)
+     - asKeyword - (default=``False``) - enforce Keyword-style matching on the
+       generated expressions
+
+    Example::
+
+        comp_oper = oneOf("< = > <= >= !=")
+        var = Word(alphas)
+        number = Word(nums)
+        term = var | number
+        comparison_expr = term + comp_oper + term
+        print(comparison_expr.searchString("B = 12  AA=23 B<=AA AA>12"))
+
+    prints::
+
+        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]
+    """
+    if isinstance(caseless, basestring):
+        warnings.warn("More than one string argument passed to oneOf, pass "
+                      "choices as a list or space-delimited string", stacklevel=2)
+
+    if caseless:
+        isequal = (lambda a, b: a.upper() == b.upper())
+        masks = (lambda a, b: b.upper().startswith(a.upper()))
+        parseElementClass = CaselessKeyword if asKeyword else CaselessLiteral
+    else:
+        isequal = (lambda a, b: a == b)
+        masks = (lambda a, b: b.startswith(a))
+        parseElementClass = Keyword if asKeyword else Literal
+
+    symbols = []
+    if isinstance(strs, basestring):
+        symbols = strs.split()
+    elif isinstance(strs, Iterable):
+        symbols = list(strs)
+    else:
+        warnings.warn("Invalid argument to oneOf, expected string or iterable",
+                      SyntaxWarning, stacklevel=2)
+    if not symbols:
+        return NoMatch()
+
+    if not asKeyword:
+        # if not producing keywords, need to reorder to take care to avoid masking
+        # longer choices with shorter ones
+        i = 0
+        while i < len(symbols) - 1:
+            cur = symbols[i]
+            for j, other in enumerate(symbols[i + 1:]):
+                if isequal(other, cur):
+                    del symbols[i + j + 1]
+                    break
+                elif masks(cur, other):
+                    del symbols[i + j + 1]
+                    symbols.insert(i, other)
+                    break
+            else:
+                i += 1
+
+    if not (caseless or asKeyword) and useRegex:
+        # ~ print (strs, "->", "|".join([_escapeRegexChars(sym) for sym in symbols]))
+        try:
+            if len(symbols) == len("".join(symbols)):
+                return Regex("[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols)).setName(' | '.join(symbols))
+            else:
+                return Regex("|".join(re.escape(sym) for sym in symbols)).setName(' | '.join(symbols))
+        except Exception:
+            warnings.warn("Exception creating Regex for oneOf, building MatchFirst",
+                    SyntaxWarning, stacklevel=2)
+
+    # last resort, just use MatchFirst
+    return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols))
+
+def dictOf(key, value):
+    """Helper to easily and clearly define a dictionary by specifying
+    the respective patterns for the key and value.  Takes care of
+    defining the :class:`Dict`, :class:`ZeroOrMore`, and
+    :class:`Group` tokens in the proper order.  The key pattern
+    can include delimiting markers or punctuation, as long as they are
+    suppressed, thereby leaving the significant key text.  The value
+    pattern can include named results, so that the :class:`Dict` results
+    can include named token fields.
+
+    Example::
+
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        print(OneOrMore(attr_expr).parseString(text).dump())
+
+        attr_label = label
+        attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)
+
+        # similar to Dict, but simpler call format
+        result = dictOf(attr_label, attr_value).parseString(text)
+        print(result.dump())
+        print(result['shape'])
+        print(result.shape)  # object attribute access works too
+        print(result.asDict())
+
+    prints::
+
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        SQUARE
+        {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}
+    """
+    return Dict(OneOrMore(Group(key + value)))
+
+def originalTextFor(expr, asString=True):
+    """Helper to return the original, untokenized text for a given
+    expression.  Useful to restore the parsed fields of an HTML start
+    tag into the raw tag text itself, or to revert separate tokens with
+    intervening whitespace back to the original matching input text. By
+    default, returns astring containing the original parsed text.
+
+    If the optional ``asString`` argument is passed as
+    ``False``, then the return value is
+    a :class:`ParseResults` containing any results names that
+    were originally matched, and a single token containing the original
+    matched text from the input string.  So if the expression passed to
+    :class:`originalTextFor` contains expressions with defined
+    results names, you must set ``asString`` to ``False`` if you
+    want to preserve those results name values.
+
+    Example::
+
+        src = "this is test <b> bold <i>text</i> </b> normal text "
+        for tag in ("b", "i"):
+            opener, closer = makeHTMLTags(tag)
+            patt = originalTextFor(opener + SkipTo(closer) + closer)
+            print(patt.searchString(src)[0])
+
+    prints::
+
+        ['<b> bold <i>text</i> </b>']
+        ['<i>text</i>']
+    """
+    locMarker = Empty().setParseAction(lambda s, loc, t: loc)
+    endlocMarker = locMarker.copy()
+    endlocMarker.callPreparse = False
+    matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end")
+    if asString:
+        extractText = lambda s, l, t: s[t._original_start: t._original_end]
+    else:
+        def extractText(s, l, t):
+            t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]]
+    matchExpr.setParseAction(extractText)
+    matchExpr.ignoreExprs = expr.ignoreExprs
+    return matchExpr
+
+def ungroup(expr):
+    """Helper to undo pyparsing's default grouping of And expressions,
+    even if all but one are non-empty.
+    """
+    return TokenConverter(expr).addParseAction(lambda t: t[0])
+
+def locatedExpr(expr):
+    """Helper to decorate a returned token with its starting and ending
+    locations in the input string.
+
+    This helper adds the following results names:
+
+     - locn_start = location where matched expression begins
+     - locn_end = location where matched expression ends
+     - value = the actual parsed results
+
+    Be careful if the input text contains ``<TAB>`` characters, you
+    may want to call :class:`ParserElement.parseWithTabs`
+
+    Example::
+
+        wd = Word(alphas)
+        for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):
+            print(match)
+
+    prints::
+
+        [[0, 'ljsdf', 5]]
+        [[8, 'lksdjjf', 15]]
+        [[18, 'lkkjj', 23]]
+    """
+    locator = Empty().setParseAction(lambda s, l, t: l)
+    return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end"))
+
+
+# convenience constants for positional expressions
+empty       = Empty().setName("empty")
+lineStart   = LineStart().setName("lineStart")
+lineEnd     = LineEnd().setName("lineEnd")
+stringStart = StringStart().setName("stringStart")
+stringEnd   = StringEnd().setName("stringEnd")
+
+_escapedPunc = Word(_bslash, r"\[]-*.$+^?()~ ", exact=2).setParseAction(lambda s, l, t: t[0][1])
+_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s, l, t: unichr(int(t[0].lstrip(r'\0x'), 16)))
+_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s, l, t: unichr(int(t[0][1:], 8)))
+_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1)
+_charRange = Group(_singleChar + Suppress("-") + _singleChar)
+_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group(OneOrMore(_charRange | _singleChar)).setResultsName("body") + "]"
+
+def srange(s):
+    r"""Helper to easily define string ranges for use in Word
+    construction. Borrows syntax from regexp '[]' string range
+    definitions::
+
+        srange("[0-9]")   -> "0123456789"
+        srange("[a-z]")   -> "abcdefghijklmnopqrstuvwxyz"
+        srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
+
+    The input string must be enclosed in []'s, and the returned string
+    is the expanded character set joined into a single string. The
+    values enclosed in the []'s may be:
+
+     - a single character
+     - an escaped character with a leading backslash (such as ``\-``
+       or ``\]``)
+     - an escaped hex character with a leading ``'\x'``
+       (``\x21``, which is a ``'!'`` character) (``\0x##``
+       is also supported for backwards compatibility)
+     - an escaped octal character with a leading ``'\0'``
+       (``\041``, which is a ``'!'`` character)
+     - a range of any of the above, separated by a dash (``'a-z'``,
+       etc.)
+     - any combination of the above (``'aeiouy'``,
+       ``'a-zA-Z0-9_$'``, etc.)
+    """
+    _expanded = lambda p: p if not isinstance(p, ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]), ord(p[1]) + 1))
+    try:
+        return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body)
+    except Exception:
+        return ""
+
+def matchOnlyAtCol(n):
+    """Helper method for defining parse actions that require matching at
+    a specific column in the input text.
+    """
+    def verifyCol(strg, locn, toks):
+        if col(locn, strg) != n:
+            raise ParseException(strg, locn, "matched token not at column %d" % n)
+    return verifyCol
+
+def replaceWith(replStr):
+    """Helper method for common parse actions that simply return
+    a literal value.  Especially useful when used with
+    :class:`transformString<ParserElement.transformString>` ().
+
+    Example::
+
+        num = Word(nums).setParseAction(lambda toks: int(toks[0]))
+        na = oneOf("N/A NA").setParseAction(replaceWith(math.nan))
+        term = na | num
+
+        OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234]
+    """
+    return lambda s, l, t: [replStr]
+
+def removeQuotes(s, l, t):
+    """Helper parse action for removing quotation marks from parsed
+    quoted strings.
+
+    Example::
+
+        # by default, quotation marks are included in parsed results
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]
+
+        # use removeQuotes to strip quotation marks from parsed results
+        quotedString.setParseAction(removeQuotes)
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]
+    """
+    return t[0][1:-1]
+
+def tokenMap(func, *args):
+    """Helper to define a parse action by mapping a function to all
+    elements of a ParseResults list. If any additional args are passed,
+    they are forwarded to the given function as additional arguments
+    after the token, as in
+    ``hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))``,
+    which will convert the parsed data to an integer using base 16.
+
+    Example (compare the last to example in :class:`ParserElement.transformString`::
+
+        hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16))
+        hex_ints.runTests('''
+            00 11 22 aa FF 0a 0d 1a
+            ''')
+
+        upperword = Word(alphas).setParseAction(tokenMap(str.upper))
+        OneOrMore(upperword).runTests('''
+            my kingdom for a horse
+            ''')
+
+        wd = Word(alphas).setParseAction(tokenMap(str.title))
+        OneOrMore(wd).setParseAction(' '.join).runTests('''
+            now is the winter of our discontent made glorious summer by this sun of york
+            ''')
+
+    prints::
+
+        00 11 22 aa FF 0a 0d 1a
+        [0, 17, 34, 170, 255, 10, 13, 26]
+
+        my kingdom for a horse
+        ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']
+
+        now is the winter of our discontent made glorious summer by this sun of york
+        ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']
+    """
+    def pa(s, l, t):
+        return [func(tokn, *args) for tokn in t]
+
+    try:
+        func_name = getattr(func, '__name__',
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    pa.__name__ = func_name
+
+    return pa
+
+upcaseTokens = tokenMap(lambda t: _ustr(t).upper())
+"""(Deprecated) Helper parse action to convert tokens to upper case.
+Deprecated in favor of :class:`pyparsing_common.upcaseTokens`"""
+
+downcaseTokens = tokenMap(lambda t: _ustr(t).lower())
+"""(Deprecated) Helper parse action to convert tokens to lower case.
+Deprecated in favor of :class:`pyparsing_common.downcaseTokens`"""
+
+def _makeTags(tagStr, xml,
+              suppress_LT=Suppress("<"),
+              suppress_GT=Suppress(">")):
+    """Internal helper to construct opening and closing tag expressions, given a tag name"""
+    if isinstance(tagStr, basestring):
+        resname = tagStr
+        tagStr = Keyword(tagStr, caseless=not xml)
+    else:
+        resname = tagStr.name
+
+    tagAttrName = Word(alphas, alphanums + "_-:")
+    if xml:
+        tagAttrValue = dblQuotedString.copy().setParseAction(removeQuotes)
+        openTag = (suppress_LT
+                   + tagStr("tag")
+                   + Dict(ZeroOrMore(Group(tagAttrName + Suppress("=") + tagAttrValue)))
+                   + Optional("/", default=[False])("empty").setParseAction(lambda s, l, t: t[0] == '/')
+                   + suppress_GT)
+    else:
+        tagAttrValue = quotedString.copy().setParseAction(removeQuotes) | Word(printables, excludeChars=">")
+        openTag = (suppress_LT
+                   + tagStr("tag")
+                   + Dict(ZeroOrMore(Group(tagAttrName.setParseAction(downcaseTokens)
+                                           + Optional(Suppress("=") + tagAttrValue))))
+                   + Optional("/", default=[False])("empty").setParseAction(lambda s, l, t: t[0] == '/')
+                   + suppress_GT)
+    closeTag = Combine(_L("</") + tagStr + ">", adjacent=False)
+
+    openTag.setName("<%s>" % resname)
+    # add start<tagname> results name in parse action now that ungrouped names are not reported at two levels
+    openTag.addParseAction(lambda t: t.__setitem__("start" + "".join(resname.replace(":", " ").title().split()), t.copy()))
+    closeTag = closeTag("end" + "".join(resname.replace(":", " ").title().split())).setName("</%s>" % resname)
+    openTag.tag = resname
+    closeTag.tag = resname
+    openTag.tag_body = SkipTo(closeTag())
+    return openTag, closeTag
+
+def makeHTMLTags(tagStr):
+    """Helper to construct opening and closing tag expressions for HTML,
+    given a tag name. Matches tags in either upper or lower case,
+    attributes with namespaces and with quoted or unquoted values.
+
+    Example::
+
+        text = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
+        # makeHTMLTags returns pyparsing expressions for the opening and
+        # closing tags as a 2-tuple
+        a, a_end = makeHTMLTags("A")
+        link_expr = a + SkipTo(a_end)("link_text") + a_end
+
+        for link in link_expr.searchString(text):
+            # attributes in the <A> tag (like "href" shown here) are
+            # also accessible as named results
+            print(link.link_text, '->', link.href)
+
+    prints::
+
+        pyparsing -> https://github.com/pyparsing/pyparsing/wiki
+    """
+    return _makeTags(tagStr, False)
+
+def makeXMLTags(tagStr):
+    """Helper to construct opening and closing tag expressions for XML,
+    given a tag name. Matches tags only in the given upper/lower case.
+
+    Example: similar to :class:`makeHTMLTags`
+    """
+    return _makeTags(tagStr, True)
+
+def withAttribute(*args, **attrDict):
+    """Helper to create a validating parse action to be used with start
+    tags created with :class:`makeXMLTags` or
+    :class:`makeHTMLTags`. Use ``withAttribute`` to qualify
+    a starting tag with a required attribute value, to avoid false
+    matches on common tags such as ``<TD>`` or ``<DIV>``.
+
+    Call ``withAttribute`` with a series of attribute names and
+    values. Specify the list of filter attributes names and values as:
+
+     - keyword arguments, as in ``(align="right")``, or
+     - as an explicit dict with ``**`` operator, when an attribute
+       name is also a Python reserved word, as in ``**{"class":"Customer", "align":"right"}``
+     - a list of name-value tuples, as in ``(("ns1:class", "Customer"), ("ns2:align", "right"))``
+
+    For attribute names with a namespace prefix, you must use the second
+    form.  Attribute names are matched insensitive to upper/lower case.
+
+    If just testing for ``class`` (with or without a namespace), use
+    :class:`withClass`.
+
+    To verify that the attribute exists, but without specifying a value,
+    pass ``withAttribute.ANY_VALUE`` as the value.
+
+    Example::
+
+        html = '''
+            <div>
+            Some text
+            <div type="grid">1 4 0 1 0</div>
+            <div type="graph">1,3 2,3 1,1</div>
+            <div>this has no type</div>
+            </div>
+
+        '''
+        div,div_end = makeHTMLTags("div")
+
+        # only match div tag having a type attribute with value "grid"
+        div_grid = div().setParseAction(withAttribute(type="grid"))
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+
+        # construct a match with any div tag having a type attribute, regardless of the value
+        div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+
+    prints::
+
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    if args:
+        attrs = args[:]
+    else:
+        attrs = attrDict.items()
+    attrs = [(k, v) for k, v in attrs]
+    def pa(s, l, tokens):
+        for attrName, attrValue in attrs:
+            if attrName not in tokens:
+                raise ParseException(s, l, "no matching attribute " + attrName)
+            if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue:
+                raise ParseException(s, l, "attribute '%s' has value '%s', must be '%s'" %
+                                            (attrName, tokens[attrName], attrValue))
+    return pa
+withAttribute.ANY_VALUE = object()
+
+def withClass(classname, namespace=''):
+    """Simplified version of :class:`withAttribute` when
+    matching on a div class - made difficult because ``class`` is
+    a reserved word in Python.
+
+    Example::
+
+        html = '''
+            <div>
+            Some text
+            <div class="grid">1 4 0 1 0</div>
+            <div class="graph">1,3 2,3 1,1</div>
+            <div>this &lt;div&gt; has no class</div>
+            </div>
+
+        '''
+        div,div_end = makeHTMLTags("div")
+        div_grid = div().setParseAction(withClass("grid"))
+
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+
+        div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+
+    prints::
+
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    classattr = "%s:class" % namespace if namespace else "class"
+    return withAttribute(**{classattr: classname})
+
+opAssoc = SimpleNamespace()
+opAssoc.LEFT = object()
+opAssoc.RIGHT = object()
+
+def infixNotation(baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')')):
+    """Helper method for constructing grammars of expressions made up of
+    operators working in a precedence hierarchy.  Operators may be unary
+    or binary, left- or right-associative.  Parse actions can also be
+    attached to operator expressions. The generated parser will also
+    recognize the use of parentheses to override operator precedences
+    (see example below).
+
+    Note: if you define a deep operator list, you may see performance
+    issues when using infixNotation. See
+    :class:`ParserElement.enablePackrat` for a mechanism to potentially
+    improve your parser performance.
+
+    Parameters:
+     - baseExpr - expression representing the most basic element for the
+       nested
+     - opList - list of tuples, one for each operator precedence level
+       in the expression grammar; each tuple is of the form ``(opExpr,
+       numTerms, rightLeftAssoc, parseAction)``, where:
+
+       - opExpr is the pyparsing expression for the operator; may also
+         be a string, which will be converted to a Literal; if numTerms
+         is 3, opExpr is a tuple of two expressions, for the two
+         operators separating the 3 terms
+       - numTerms is the number of terms for this operator (must be 1,
+         2, or 3)
+       - rightLeftAssoc is the indicator whether the operator is right
+         or left associative, using the pyparsing-defined constants
+         ``opAssoc.RIGHT`` and ``opAssoc.LEFT``.
+       - parseAction is the parse action to be associated with
+         expressions matching this operator expression (the parse action
+         tuple member may be omitted); if the parse action is passed
+         a tuple or list of functions, this is equivalent to calling
+         ``setParseAction(*fn)``
+         (:class:`ParserElement.setParseAction`)
+     - lpar - expression for matching left-parentheses
+       (default= ``Suppress('(')``)
+     - rpar - expression for matching right-parentheses
+       (default= ``Suppress(')')``)
+
+    Example::
+
+        # simple example of four-function arithmetic with ints and
+        # variable names
+        integer = pyparsing_common.signed_integer
+        varname = pyparsing_common.identifier
+
+        arith_expr = infixNotation(integer | varname,
+            [
+            ('-', 1, opAssoc.RIGHT),
+            (oneOf('* /'), 2, opAssoc.LEFT),
+            (oneOf('+ -'), 2, opAssoc.LEFT),
+            ])
+
+        arith_expr.runTests('''
+            5+3*6
+            (5+3)*6
+            -2--11
+            ''', fullDump=False)
+
+    prints::
+
+        5+3*6
+        [[5, '+', [3, '*', 6]]]
+
+        (5+3)*6
+        [[[5, '+', 3], '*', 6]]
+
+        -2--11
+        [[['-', 2], '-', ['-', 11]]]
+    """
+    # captive version of FollowedBy that does not do parse actions or capture results names
+    class _FB(FollowedBy):
+        def parseImpl(self, instring, loc, doActions=True):
+            self.expr.tryParse(instring, loc)
+            return loc, []
+
+    ret = Forward()
+    lastExpr = baseExpr | (lpar + ret + rpar)
+    for i, operDef in enumerate(opList):
+        opExpr, arity, rightLeftAssoc, pa = (operDef + (None, ))[:4]
+        termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr
+        if arity == 3:
+            if opExpr is None or len(opExpr) != 2:
+                raise ValueError(
+                    "if numterms=3, opExpr must be a tuple or list of two expressions")
+            opExpr1, opExpr2 = opExpr
+        thisExpr = Forward().setName(termName)
+        if rightLeftAssoc == opAssoc.LEFT:
+            if arity == 1:
+                matchExpr = _FB(lastExpr + opExpr) + Group(lastExpr + OneOrMore(opExpr))
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = _FB(lastExpr + opExpr + lastExpr) + Group(lastExpr + OneOrMore(opExpr + lastExpr))
+                else:
+                    matchExpr = _FB(lastExpr + lastExpr) + Group(lastExpr + OneOrMore(lastExpr))
+            elif arity == 3:
+                matchExpr = (_FB(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr)
+                             + Group(lastExpr + OneOrMore(opExpr1 + lastExpr + opExpr2 + lastExpr)))
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        elif rightLeftAssoc == opAssoc.RIGHT:
+            if arity == 1:
+                # try to avoid LR with this extra test
+                if not isinstance(opExpr, Optional):
+                    opExpr = Optional(opExpr)
+                matchExpr = _FB(opExpr.expr + thisExpr) + Group(opExpr + thisExpr)
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = _FB(lastExpr + opExpr + thisExpr) + Group(lastExpr + OneOrMore(opExpr + thisExpr))
+                else:
+                    matchExpr = _FB(lastExpr + thisExpr) + Group(lastExpr + OneOrMore(thisExpr))
+            elif arity == 3:
+                matchExpr = (_FB(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr)
+                             + Group(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr))
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        else:
+            raise ValueError("operator must indicate right or left associativity")
+        if pa:
+            if isinstance(pa, (tuple, list)):
+                matchExpr.setParseAction(*pa)
+            else:
+                matchExpr.setParseAction(pa)
+        thisExpr <<= (matchExpr.setName(termName) | lastExpr)
+        lastExpr = thisExpr
+    ret <<= lastExpr
+    return ret
+
+operatorPrecedence = infixNotation
+"""(Deprecated) Former name of :class:`infixNotation`, will be
+dropped in a future release."""
+
+dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*') + '"').setName("string enclosed in double quotes")
+sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*") + "'").setName("string enclosed in single quotes")
+quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*') + '"'
+                       | Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*") + "'").setName("quotedString using single or double quotes")
+unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal")
+
+def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()):
+    """Helper method for defining nested lists enclosed in opening and
+    closing delimiters ("(" and ")" are the default).
+
+    Parameters:
+     - opener - opening character for a nested list
+       (default= ``"("``); can also be a pyparsing expression
+     - closer - closing character for a nested list
+       (default= ``")"``); can also be a pyparsing expression
+     - content - expression for items within the nested lists
+       (default= ``None``)
+     - ignoreExpr - expression for ignoring opening and closing
+       delimiters (default= :class:`quotedString`)
+
+    If an expression is not provided for the content argument, the
+    nested expression will capture all whitespace-delimited content
+    between delimiters as a list of separate values.
+
+    Use the ``ignoreExpr`` argument to define expressions that may
+    contain opening or closing characters that should not be treated as
+    opening or closing characters for nesting, such as quotedString or
+    a comment expression.  Specify multiple expressions using an
+    :class:`Or` or :class:`MatchFirst`. The default is
+    :class:`quotedString`, but if no expressions are to be ignored, then
+    pass ``None`` for this argument.
+
+    Example::
+
+        data_type = oneOf("void int short long char float double")
+        decl_data_type = Combine(data_type + Optional(Word('*')))
+        ident = Word(alphas+'_', alphanums+'_')
+        number = pyparsing_common.number
+        arg = Group(decl_data_type + ident)
+        LPAR, RPAR = map(Suppress, "()")
+
+        code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment))
+
+        c_function = (decl_data_type("type")
+                      + ident("name")
+                      + LPAR + Optional(delimitedList(arg), [])("args") + RPAR
+                      + code_body("body"))
+        c_function.ignore(cStyleComment)
+
+        source_code = '''
+            int is_odd(int x) {
+                return (x%2);
+            }
+
+            int dec_to_hex(char hchar) {
+                if (hchar >= '0' && hchar <= '9') {
+                    return (ord(hchar)-ord('0'));
+                } else {
+                    return (10+ord(hchar)-ord('A'));
+                }
+            }
+        '''
+        for func in c_function.searchString(source_code):
+            print("%(name)s (%(type)s) args: %(args)s" % func)
+
+
+    prints::
+
+        is_odd (int) args: [['int', 'x']]
+        dec_to_hex (int) args: [['char', 'hchar']]
+    """
+    if opener == closer:
+        raise ValueError("opening and closing strings cannot be the same")
+    if content is None:
+        if isinstance(opener, basestring) and isinstance(closer, basestring):
+            if len(opener) == 1 and len(closer) == 1:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr
+                                                 + CharsNotIn(opener
+                                                              + closer
+                                                              + ParserElement.DEFAULT_WHITE_CHARS, exact=1)
+                                                 )
+                                       ).setParseAction(lambda t: t[0].strip()))
+                else:
+                    content = (empty.copy() + CharsNotIn(opener
+                                                         + closer
+                                                         + ParserElement.DEFAULT_WHITE_CHARS
+                                                         ).setParseAction(lambda t: t[0].strip()))
+            else:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr
+                                                 + ~Literal(opener)
+                                                 + ~Literal(closer)
+                                                 + CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS, exact=1))
+                                       ).setParseAction(lambda t: t[0].strip()))
+                else:
+                    content = (Combine(OneOrMore(~Literal(opener)
+                                                 + ~Literal(closer)
+                                                 + CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS, exact=1))
+                                       ).setParseAction(lambda t: t[0].strip()))
+        else:
+            raise ValueError("opening and closing arguments must be strings if no content expression is given")
+    ret = Forward()
+    if ignoreExpr is not None:
+        ret <<= Group(Suppress(opener) + ZeroOrMore(ignoreExpr | ret | content) + Suppress(closer))
+    else:
+        ret <<= Group(Suppress(opener) + ZeroOrMore(ret | content)  + Suppress(closer))
+    ret.setName('nested %s%s expression' % (opener, closer))
+    return ret
+
+def indentedBlock(blockStatementExpr, indentStack, indent=True):
+    """Helper method for defining space-delimited indentation blocks,
+    such as those used to define block statements in Python source code.
+
+    Parameters:
+
+     - blockStatementExpr - expression defining syntax of statement that
+       is repeated within the indented block
+     - indentStack - list created by caller to manage indentation stack
+       (multiple statementWithIndentedBlock expressions within a single
+       grammar should share a common indentStack)
+     - indent - boolean indicating whether block must be indented beyond
+       the current level; set to False for block of left-most
+       statements (default= ``True``)
+
+    A valid block must contain at least one ``blockStatement``.
+
+    Example::
+
+        data = '''
+        def A(z):
+          A1
+          B = 100
+          G = A2
+          A2
+          A3
+        B
+        def BB(a,b,c):
+          BB1
+          def BBA():
+            bba1
+            bba2
+            bba3
+        C
+        D
+        def spam(x,y):
+             def eggs(z):
+                 pass
+        '''
+
+
+        indentStack = [1]
+        stmt = Forward()
+
+        identifier = Word(alphas, alphanums)
+        funcDecl = ("def" + identifier + Group("(" + Optional(delimitedList(identifier)) + ")") + ":")
+        func_body = indentedBlock(stmt, indentStack)
+        funcDef = Group(funcDecl + func_body)
+
+        rvalue = Forward()
+        funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")")
+        rvalue << (funcCall | identifier | Word(nums))
+        assignment = Group(identifier + "=" + rvalue)
+        stmt << (funcDef | assignment | identifier)
+
+        module_body = OneOrMore(stmt)
+
+        parseTree = module_body.parseString(data)
+        parseTree.pprint()
+
+    prints::
+
+        [['def',
+          'A',
+          ['(', 'z', ')'],
+          ':',
+          [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],
+         'B',
+         ['def',
+          'BB',
+          ['(', 'a', 'b', 'c', ')'],
+          ':',
+          [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],
+         'C',
+         'D',
+         ['def',
+          'spam',
+          ['(', 'x', 'y', ')'],
+          ':',
+          [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]]
+    """
+    backup_stack = indentStack[:]
+
+    def reset_stack():
+        indentStack[:] = backup_stack
+
+    def checkPeerIndent(s, l, t):
+        if l >= len(s): return
+        curCol = col(l, s)
+        if curCol != indentStack[-1]:
+            if curCol > indentStack[-1]:
+                raise ParseException(s, l, "illegal nesting")
+            raise ParseException(s, l, "not a peer entry")
+
+    def checkSubIndent(s, l, t):
+        curCol = col(l, s)
+        if curCol > indentStack[-1]:
+            indentStack.append(curCol)
+        else:
+            raise ParseException(s, l, "not a subentry")
+
+    def checkUnindent(s, l, t):
+        if l >= len(s): return
+        curCol = col(l, s)
+        if not(indentStack and curCol in indentStack):
+            raise ParseException(s, l, "not an unindent")
+        if curCol < indentStack[-1]:
+            indentStack.pop()
+
+    NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress(), stopOn=StringEnd())
+    INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT')
+    PEER   = Empty().setParseAction(checkPeerIndent).setName('')
+    UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT')
+    if indent:
+        smExpr = Group(Optional(NL)
+                       + INDENT
+                       + OneOrMore(PEER + Group(blockStatementExpr) + Optional(NL), stopOn=StringEnd())
+                       + UNDENT)
+    else:
+        smExpr = Group(Optional(NL)
+                       + OneOrMore(PEER + Group(blockStatementExpr) + Optional(NL), stopOn=StringEnd())
+                       + UNDENT)
+    smExpr.setFailAction(lambda a, b, c, d: reset_stack())
+    blockStatementExpr.ignore(_bslash + LineEnd())
+    return smExpr.setName('indented block')
+
+alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]")
+punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]")
+
+anyOpenTag, anyCloseTag = makeHTMLTags(Word(alphas, alphanums + "_:").setName('any tag'))
+_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(), '><& "\''))
+commonHTMLEntity = Regex('&(?P<entity>' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity")
+def replaceHTMLEntity(t):
+    """Helper parser action to replace common HTML entities with their special characters"""
+    return _htmlEntityMap.get(t.entity)
+
+# it's easy to get these comment structures wrong - they're very common, so may as well make them available
+cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment")
+"Comment of the form ``/* ... */``"
+
+htmlComment = Regex(r"<!--[\s\S]*?-->").setName("HTML comment")
+"Comment of the form ``<!-- ... -->``"
+
+restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line")
+dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment")
+"Comment of the form ``// ... (to end of line)``"
+
+cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/' | dblSlashComment).setName("C++ style comment")
+"Comment of either form :class:`cStyleComment` or :class:`dblSlashComment`"
+
+javaStyleComment = cppStyleComment
+"Same as :class:`cppStyleComment`"
+
+pythonStyleComment = Regex(r"#.*").setName("Python style comment")
+"Comment of the form ``# ... (to end of line)``"
+
+_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',')
+                                  + Optional(Word(" \t")
+                                             + ~Literal(",") + ~LineEnd()))).streamline().setName("commaItem")
+commaSeparatedList = delimitedList(Optional(quotedString.copy() | _commasepitem, default="")).setName("commaSeparatedList")
+"""(Deprecated) Predefined expression of 1 or more printable words or
+quoted strings, separated by commas.
+
+This expression is deprecated in favor of :class:`pyparsing_common.comma_separated_list`.
+"""
+
+# some other useful expressions - using lower-case class name since we are really using this as a namespace
+class pyparsing_common:
+    """Here are some common low-level expressions that may be useful in
+    jump-starting parser development:
+
+     - numeric forms (:class:`integers<integer>`, :class:`reals<real>`,
+       :class:`scientific notation<sci_real>`)
+     - common :class:`programming identifiers<identifier>`
+     - network addresses (:class:`MAC<mac_address>`,
+       :class:`IPv4<ipv4_address>`, :class:`IPv6<ipv6_address>`)
+     - ISO8601 :class:`dates<iso8601_date>` and
+       :class:`datetime<iso8601_datetime>`
+     - :class:`UUID<uuid>`
+     - :class:`comma-separated list<comma_separated_list>`
+
+    Parse actions:
+
+     - :class:`convertToInteger`
+     - :class:`convertToFloat`
+     - :class:`convertToDate`
+     - :class:`convertToDatetime`
+     - :class:`stripHTMLTags`
+     - :class:`upcaseTokens`
+     - :class:`downcaseTokens`
+
+    Example::
+
+        pyparsing_common.number.runTests('''
+            # any int or real number, returned as the appropriate type
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.fnumber.runTests('''
+            # any int or real number, returned as float
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.hex_integer.runTests('''
+            # hex numbers
+            100
+            FF
+            ''')
+
+        pyparsing_common.fraction.runTests('''
+            # fractions
+            1/2
+            -3/4
+            ''')
+
+        pyparsing_common.mixed_integer.runTests('''
+            # mixed fractions
+            1
+            1/2
+            -3/4
+            1-3/4
+            ''')
+
+        import uuid
+        pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+        pyparsing_common.uuid.runTests('''
+            # uuid
+            12345678-1234-5678-1234-567812345678
+            ''')
+
+    prints::
+
+        # any int or real number, returned as the appropriate type
+        100
+        [100]
+
+        -100
+        [-100]
+
+        +100
+        [100]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # any int or real number, returned as float
+        100
+        [100.0]
+
+        -100
+        [-100.0]
+
+        +100
+        [100.0]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # hex numbers
+        100
+        [256]
+
+        FF
+        [255]
+
+        # fractions
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        # mixed fractions
+        1
+        [1]
+
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        1-3/4
+        [1.75]
+
+        # uuid
+        12345678-1234-5678-1234-567812345678
+        [UUID('12345678-1234-5678-1234-567812345678')]
+    """
+
+    convertToInteger = tokenMap(int)
+    """
+    Parse action for converting parsed integers to Python int
+    """
+
+    convertToFloat = tokenMap(float)
+    """
+    Parse action for converting parsed numbers to Python float
+    """
+
+    integer = Word(nums).setName("integer").setParseAction(convertToInteger)
+    """expression that parses an unsigned integer, returns an int"""
+
+    hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int, 16))
+    """expression that parses a hexadecimal integer, returns an int"""
+
+    signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger)
+    """expression that parses an integer with optional leading sign, returns an int"""
+
+    fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction")
+    """fractional expression of an integer divided by an integer, returns a float"""
+    fraction.addParseAction(lambda t: t[0]/t[-1])
+
+    mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction")
+    """mixed integer of the form 'integer - fraction', with optional leading integer, returns float"""
+    mixed_integer.addParseAction(sum)
+
+    real = Regex(r'[+-]?(?:\d+\.\d*|\.\d+)').setName("real number").setParseAction(convertToFloat)
+    """expression that parses a floating point number and returns a float"""
+
+    sci_real = Regex(r'[+-]?(?:\d+(?:[eE][+-]?\d+)|(?:\d+\.\d*|\.\d+)(?:[eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat)
+    """expression that parses a floating point number with optional
+    scientific notation and returns a float"""
+
+    # streamlining this expression makes the docs nicer-looking
+    number = (sci_real | real | signed_integer).streamline()
+    """any numeric expression, returns the corresponding Python type"""
+
+    fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat)
+    """any int or real number, returned as float"""
+
+    identifier = Word(alphas + '_', alphanums + '_').setName("identifier")
+    """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')"""
+
+    ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address")
+    "IPv4 address (``0.0.0.0 - 255.255.255.255``)"
+
+    _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer")
+    _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part) * 7).setName("full IPv6 address")
+    _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part) * (0, 6))
+                           + "::"
+                           + Optional(_ipv6_part + (':' + _ipv6_part) * (0, 6))
+                           ).setName("short IPv6 address")
+    _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8)
+    _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address")
+    ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address")
+    "IPv6 address (long, short, or mixed form)"
+
+    mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address")
+    "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)"
+
+    @staticmethod
+    def convertToDate(fmt="%Y-%m-%d"):
+        """
+        Helper to create a parse action for converting parsed date string to Python datetime.date
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%d"``)
+
+        Example::
+
+            date_expr = pyparsing_common.iso8601_date.copy()
+            date_expr.setParseAction(pyparsing_common.convertToDate())
+            print(date_expr.parseString("1999-12-31"))
+
+        prints::
+
+            [datetime.date(1999, 12, 31)]
+        """
+        def cvt_fn(s, l, t):
+            try:
+                return datetime.strptime(t[0], fmt).date()
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    @staticmethod
+    def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"):
+        """Helper to create a parse action for converting parsed
+        datetime string to Python datetime.datetime
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%dT%H:%M:%S.%f"``)
+
+        Example::
+
+            dt_expr = pyparsing_common.iso8601_datetime.copy()
+            dt_expr.setParseAction(pyparsing_common.convertToDatetime())
+            print(dt_expr.parseString("1999-12-31T23:59:59.999"))
+
+        prints::
+
+            [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]
+        """
+        def cvt_fn(s, l, t):
+            try:
+                return datetime.strptime(t[0], fmt)
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    iso8601_date = Regex(r'(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?').setName("ISO8601 date")
+    "ISO8601 date (``yyyy-mm-dd``)"
+
+    iso8601_datetime = Regex(r'(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime")
+    "ISO8601 datetime (``yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)``) - trailing seconds, milliseconds, and timezone optional; accepts separating ``'T'`` or ``' '``"
+
+    uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID")
+    "UUID (``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx``)"
+
+    _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress()
+    @staticmethod
+    def stripHTMLTags(s, l, tokens):
+        """Parse action to remove HTML tags from web page HTML source
+
+        Example::
+
+            # strip HTML links from normal text
+            text = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
+            td, td_end = makeHTMLTags("TD")
+            table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end
+            print(table_text.parseString(text).body)
+
+        Prints::
+
+            More info at the pyparsing wiki page
+        """
+        return pyparsing_common._html_stripper.transformString(tokens[0])
+
+    _commasepitem = Combine(OneOrMore(~Literal(",")
+                                      + ~LineEnd()
+                                      + Word(printables, excludeChars=',')
+                                      + Optional(White(" \t")))).streamline().setName("commaItem")
+    comma_separated_list = delimitedList(Optional(quotedString.copy()
+                                                  | _commasepitem, default='')
+                                         ).setName("comma separated list")
+    """Predefined expression of 1 or more printable words or quoted strings, separated by commas."""
+
+    upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper()))
+    """Parse action to convert tokens to upper case."""
+
+    downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower()))
+    """Parse action to convert tokens to lower case."""
+
+
+class _lazyclassproperty(object):
+    def __init__(self, fn):
+        self.fn = fn
+        self.__doc__ = fn.__doc__
+        self.__name__ = fn.__name__
+
+    def __get__(self, obj, cls):
+        if cls is None:
+            cls = type(obj)
+        if not hasattr(cls, '_intern') or any(cls._intern is getattr(superclass, '_intern', [])
+                                              for superclass in cls.__mro__[1:]):
+            cls._intern = {}
+        attrname = self.fn.__name__
+        if attrname not in cls._intern:
+            cls._intern[attrname] = self.fn(cls)
+        return cls._intern[attrname]
+
+
+class unicode_set(object):
+    """
+    A set of Unicode characters, for language-specific strings for
+    ``alphas``, ``nums``, ``alphanums``, and ``printables``.
+    A unicode_set is defined by a list of ranges in the Unicode character
+    set, in a class attribute ``_ranges``, such as::
+
+        _ranges = [(0x0020, 0x007e), (0x00a0, 0x00ff),]
+
+    A unicode set can also be defined using multiple inheritance of other unicode sets::
+
+        class CJK(Chinese, Japanese, Korean):
+            pass
+    """
+    _ranges = []
+
+    @classmethod
+    def _get_chars_for_ranges(cls):
+        ret = []
+        for cc in cls.__mro__:
+            if cc is unicode_set:
+                break
+            for rr in cc._ranges:
+                ret.extend(range(rr[0], rr[-1] + 1))
+        return [unichr(c) for c in sorted(set(ret))]
+
+    @_lazyclassproperty
+    def printables(cls):
+        "all non-whitespace characters in this range"
+        return u''.join(filterfalse(unicode.isspace, cls._get_chars_for_ranges()))
+
+    @_lazyclassproperty
+    def alphas(cls):
+        "all alphabetic characters in this range"
+        return u''.join(filter(unicode.isalpha, cls._get_chars_for_ranges()))
+
+    @_lazyclassproperty
+    def nums(cls):
+        "all numeric digit characters in this range"
+        return u''.join(filter(unicode.isdigit, cls._get_chars_for_ranges()))
+
+    @_lazyclassproperty
+    def alphanums(cls):
+        "all alphanumeric characters in this range"
+        return cls.alphas + cls.nums
+
+
+class pyparsing_unicode(unicode_set):
+    """
+    A namespace class for defining common language unicode_sets.
+    """
+    _ranges = [(32, sys.maxunicode)]
+
+    class Latin1(unicode_set):
+        "Unicode set for Latin-1 Unicode Character Range"
+        _ranges = [(0x0020, 0x007e), (0x00a0, 0x00ff),]
+
+    class LatinA(unicode_set):
+        "Unicode set for Latin-A Unicode Character Range"
+        _ranges = [(0x0100, 0x017f),]
+
+    class LatinB(unicode_set):
+        "Unicode set for Latin-B Unicode Character Range"
+        _ranges = [(0x0180, 0x024f),]
+
+    class Greek(unicode_set):
+        "Unicode set for Greek Unicode Character Ranges"
+        _ranges = [
+            (0x0370, 0x03ff), (0x1f00, 0x1f15), (0x1f18, 0x1f1d), (0x1f20, 0x1f45), (0x1f48, 0x1f4d),
+            (0x1f50, 0x1f57), (0x1f59,), (0x1f5b,), (0x1f5d,), (0x1f5f, 0x1f7d), (0x1f80, 0x1fb4), (0x1fb6, 0x1fc4),
+            (0x1fc6, 0x1fd3), (0x1fd6, 0x1fdb), (0x1fdd, 0x1fef), (0x1ff2, 0x1ff4), (0x1ff6, 0x1ffe),
+        ]
+
+    class Cyrillic(unicode_set):
+        "Unicode set for Cyrillic Unicode Character Range"
+        _ranges = [(0x0400, 0x04ff)]
+
+    class Chinese(unicode_set):
+        "Unicode set for Chinese Unicode Character Range"
+        _ranges = [(0x4e00, 0x9fff), (0x3000, 0x303f),]
+
+    class Japanese(unicode_set):
+        "Unicode set for Japanese Unicode Character Range, combining Kanji, Hiragana, and Katakana ranges"
+        _ranges = []
+
+        class Kanji(unicode_set):
+            "Unicode set for Kanji Unicode Character Range"
+            _ranges = [(0x4E00, 0x9Fbf), (0x3000, 0x303f),]
+
+        class Hiragana(unicode_set):
+            "Unicode set for Hiragana Unicode Character Range"
+            _ranges = [(0x3040, 0x309f),]
+
+        class Katakana(unicode_set):
+            "Unicode set for Katakana  Unicode Character Range"
+            _ranges = [(0x30a0, 0x30ff),]
+
+    class Korean(unicode_set):
+        "Unicode set for Korean Unicode Character Range"
+        _ranges = [(0xac00, 0xd7af), (0x1100, 0x11ff), (0x3130, 0x318f), (0xa960, 0xa97f), (0xd7b0, 0xd7ff), (0x3000, 0x303f),]
+
+    class CJK(Chinese, Japanese, Korean):
+        "Unicode set for combined Chinese, Japanese, and Korean (CJK) Unicode Character Range"
+        pass
+
+    class Thai(unicode_set):
+        "Unicode set for Thai Unicode Character Range"
+        _ranges = [(0x0e01, 0x0e3a), (0x0e3f, 0x0e5b),]
+
+    class Arabic(unicode_set):
+        "Unicode set for Arabic Unicode Character Range"
+        _ranges = [(0x0600, 0x061b), (0x061e, 0x06ff), (0x0700, 0x077f),]
+
+    class Hebrew(unicode_set):
+        "Unicode set for Hebrew Unicode Character Range"
+        _ranges = [(0x0590, 0x05ff),]
+
+    class Devanagari(unicode_set):
+        "Unicode set for Devanagari Unicode Character Range"
+        _ranges = [(0x0900, 0x097f), (0xa8e0, 0xa8ff)]
+
+pyparsing_unicode.Japanese._ranges = (pyparsing_unicode.Japanese.Kanji._ranges
+                                      + pyparsing_unicode.Japanese.Hiragana._ranges
+                                      + pyparsing_unicode.Japanese.Katakana._ranges)
+
+# define ranges in language character sets
+if PY_3:
+    setattr(pyparsing_unicode, u"العربية", pyparsing_unicode.Arabic)
+    setattr(pyparsing_unicode, u"中文", pyparsing_unicode.Chinese)
+    setattr(pyparsing_unicode, u"кириллица", pyparsing_unicode.Cyrillic)
+    setattr(pyparsing_unicode, u"Ελληνικά", pyparsing_unicode.Greek)
+    setattr(pyparsing_unicode, u"עִברִית", pyparsing_unicode.Hebrew)
+    setattr(pyparsing_unicode, u"日本語", pyparsing_unicode.Japanese)
+    setattr(pyparsing_unicode.Japanese, u"漢字", pyparsing_unicode.Japanese.Kanji)
+    setattr(pyparsing_unicode.Japanese, u"カタカナ", pyparsing_unicode.Japanese.Katakana)
+    setattr(pyparsing_unicode.Japanese, u"ひらがな", pyparsing_unicode.Japanese.Hiragana)
+    setattr(pyparsing_unicode, u"한국어", pyparsing_unicode.Korean)
+    setattr(pyparsing_unicode, u"ไทย", pyparsing_unicode.Thai)
+    setattr(pyparsing_unicode, u"देवनागरी", pyparsing_unicode.Devanagari)
+
+
+class pyparsing_test:
+    """
+    namespace class for classes useful in writing unit tests
+    """
+
+    class reset_pyparsing_context:
+        """
+        Context manager to be used when writing unit tests that modify pyparsing config values:
+         - packrat parsing
+         - default whitespace characters.
+         - default keyword characters
+         - literal string auto-conversion class
+         - __diag__ settings
+
+        Example:
+            with reset_pyparsing_context():
+                # test that literals used to construct a grammar are automatically suppressed
+                ParserElement.inlineLiteralsUsing(Suppress)
+
+                term = Word(alphas) | Word(nums)
+                group = Group('(' + term[...] + ')')
+
+                # assert that the '()' characters are not included in the parsed tokens
+                self.assertParseAndCheckLisst(group, "(abc 123 def)", ['abc', '123', 'def'])
+
+            # after exiting context manager, literals are converted to Literal expressions again
+        """
+
+        def __init__(self):
+            self._save_context = {}
+
+        def save(self):
+            self._save_context["default_whitespace"] = ParserElement.DEFAULT_WHITE_CHARS
+            self._save_context["default_keyword_chars"] = Keyword.DEFAULT_KEYWORD_CHARS
+            self._save_context[
+                "literal_string_class"
+            ] = ParserElement._literalStringClass
+            self._save_context["packrat_enabled"] = ParserElement._packratEnabled
+            self._save_context["packrat_parse"] = ParserElement._parse
+            self._save_context["__diag__"] = {
+                name: getattr(__diag__, name) for name in __diag__._all_names
+            }
+            self._save_context["__compat__"] = {
+                "collect_all_And_tokens": __compat__.collect_all_And_tokens
+            }
+            return self
+
+        def restore(self):
+            # reset pyparsing global state
+            if (
+                ParserElement.DEFAULT_WHITE_CHARS
+                != self._save_context["default_whitespace"]
+            ):
+                ParserElement.setDefaultWhitespaceChars(
+                    self._save_context["default_whitespace"]
+                )
+            Keyword.DEFAULT_KEYWORD_CHARS = self._save_context["default_keyword_chars"]
+            ParserElement.inlineLiteralsUsing(
+                self._save_context["literal_string_class"]
+            )
+            for name, value in self._save_context["__diag__"].items():
+                setattr(__diag__, name, value)
+            ParserElement._packratEnabled = self._save_context["packrat_enabled"]
+            ParserElement._parse = self._save_context["packrat_parse"]
+            __compat__.collect_all_And_tokens = self._save_context["__compat__"]
+
+        def __enter__(self):
+            return self.save()
+
+        def __exit__(self, *args):
+            return self.restore()
+
+    class TestParseResultsAsserts:
+        """
+        A mixin class to add parse results assertion methods to normal unittest.TestCase classes.
+        """
+        def assertParseResultsEquals(
+            self, result, expected_list=None, expected_dict=None, msg=None
+        ):
+            """
+            Unit test assertion to compare a ParseResults object with an optional expected_list,
+            and compare any defined results names with an optional expected_dict.
+            """
+            if expected_list is not None:
+                self.assertEqual(expected_list, result.asList(), msg=msg)
+            if expected_dict is not None:
+                self.assertEqual(expected_dict, result.asDict(), msg=msg)
+
+        def assertParseAndCheckList(
+            self, expr, test_string, expected_list, msg=None, verbose=True
+        ):
+            """
+            Convenience wrapper assert to test a parser element and input string, and assert that
+            the resulting ParseResults.asList() is equal to the expected_list.
+            """
+            result = expr.parseString(test_string, parseAll=True)
+            if verbose:
+                print(result.dump())
+            self.assertParseResultsEquals(result, expected_list=expected_list, msg=msg)
+
+        def assertParseAndCheckDict(
+            self, expr, test_string, expected_dict, msg=None, verbose=True
+        ):
+            """
+            Convenience wrapper assert to test a parser element and input string, and assert that
+            the resulting ParseResults.asDict() is equal to the expected_dict.
+            """
+            result = expr.parseString(test_string, parseAll=True)
+            if verbose:
+                print(result.dump())
+            self.assertParseResultsEquals(result, expected_dict=expected_dict, msg=msg)
+
+        def assertRunTestResults(
+            self, run_tests_report, expected_parse_results=None, msg=None
+        ):
+            """
+            Unit test assertion to evaluate output of ParserElement.runTests(). If a list of
+            list-dict tuples is given as the expected_parse_results argument, then these are zipped
+            with the report tuples returned by runTests and evaluated using assertParseResultsEquals.
+            Finally, asserts that the overall runTests() success value is True.
+
+            :param run_tests_report: tuple(bool, [tuple(str, ParseResults or Exception)]) returned from runTests
+            :param expected_parse_results (optional): [tuple(str, list, dict, Exception)]
+            """
+            run_test_success, run_test_results = run_tests_report
+
+            if expected_parse_results is not None:
+                merged = [
+                    (rpt[0], rpt[1], expected)
+                    for rpt, expected in zip(run_test_results, expected_parse_results)
+                ]
+                for test_string, result, expected in merged:
+                    # expected should be a tuple containing a list and/or a dict or an exception,
+                    # and optional failure message string
+                    # an empty tuple will skip any result validation
+                    fail_msg = next(
+                        (exp for exp in expected if isinstance(exp, str)), None
+                    )
+                    expected_exception = next(
+                        (
+                            exp
+                            for exp in expected
+                            if isinstance(exp, type) and issubclass(exp, Exception)
+                        ),
+                        None,
+                    )
+                    if expected_exception is not None:
+                        with self.assertRaises(
+                            expected_exception=expected_exception, msg=fail_msg or msg
+                        ):
+                            if isinstance(result, Exception):
+                                raise result
+                    else:
+                        expected_list = next(
+                            (exp for exp in expected if isinstance(exp, list)), None
+                        )
+                        expected_dict = next(
+                            (exp for exp in expected if isinstance(exp, dict)), None
+                        )
+                        if (expected_list, expected_dict) != (None, None):
+                            self.assertParseResultsEquals(
+                                result,
+                                expected_list=expected_list,
+                                expected_dict=expected_dict,
+                                msg=fail_msg or msg,
+                            )
+                        else:
+                            # warning here maybe?
+                            print("no validation for {!r}".format(test_string))
+
+            # do this last, in case some specific test results can be reported instead
+            self.assertTrue(
+                run_test_success, msg=msg if msg is not None else "failed runTests"
+            )
+
+        @contextmanager
+        def assertRaisesParseException(self, exc_type=ParseException, msg=None):
+            with self.assertRaises(exc_type, msg=msg):
+                yield
+
+
+if __name__ == "__main__":
+
+    selectToken    = CaselessLiteral("select")
+    fromToken      = CaselessLiteral("from")
+
+    ident          = Word(alphas, alphanums + "_$")
+
+    columnName     = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    columnNameList = Group(delimitedList(columnName)).setName("columns")
+    columnSpec     = ('*' | columnNameList)
+
+    tableName      = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    tableNameList  = Group(delimitedList(tableName)).setName("tables")
+
+    simpleSQL      = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables")
+
+    # demo runTests method, including embedded comments in test string
+    simpleSQL.runTests("""
+        # '*' as column list and dotted table name
+        select * from SYS.XYZZY
+
+        # caseless match on "SELECT", and casts back to "select"
+        SELECT * from XYZZY, ABC
+
+        # list of column names, and mixed case SELECT keyword
+        Select AA,BB,CC from Sys.dual
+
+        # multiple tables
+        Select A, B, C from Sys.dual, Table2
+
+        # invalid SELECT keyword - should fail
+        Xelect A, B, C from Sys.dual
+
+        # incomplete command - should fail
+        Select
+
+        # invalid column name - should fail
+        Select ^^^ frox Sys.dual
+
+        """)
+
+    pyparsing_common.number.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    # any int or real number, returned as float
+    pyparsing_common.fnumber.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    pyparsing_common.hex_integer.runTests("""
+        100
+        FF
+        """)
+
+    import uuid
+    pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+    pyparsing_common.uuid.runTests("""
+        12345678-1234-5678-1234-567812345678
+        """)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/__init__.py
new file mode 100644
index 0000000..517458b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/__init__.py
@@ -0,0 +1,144 @@
+# -*- coding: utf-8 -*-
+
+#   __
+#  /__)  _  _     _   _ _/   _
+# / (   (- (/ (/ (- _)  /  _)
+#          /
+
+"""
+Requests HTTP Library
+~~~~~~~~~~~~~~~~~~~~~
+
+Requests is an HTTP library, written in Python, for human beings.
+Basic GET usage:
+
+   >>> import requests
+   >>> r = requests.get('https://www.python.org')
+   >>> r.status_code
+   200
+   >>> b'Python is a programming language' in r.content
+   True
+
+... or POST:
+
+   >>> payload = dict(key1='value1', key2='value2')
+   >>> r = requests.post('https://httpbin.org/post', data=payload)
+   >>> print(r.text)
+   {
+     ...
+     "form": {
+       "key1": "value1",
+       "key2": "value2"
+     },
+     ...
+   }
+
+The other HTTP methods are supported - see `requests.api`. Full documentation
+is at <https://requests.readthedocs.io>.
+
+:copyright: (c) 2017 by Kenneth Reitz.
+:license: Apache 2.0, see LICENSE for more details.
+"""
+
+from pip._vendor import urllib3
+from pip._vendor import chardet
+import warnings
+from .exceptions import RequestsDependencyWarning
+
+
+def check_compatibility(urllib3_version, chardet_version):
+    urllib3_version = urllib3_version.split('.')
+    assert urllib3_version != ['dev']  # Verify urllib3 isn't installed from git.
+
+    # Sometimes, urllib3 only reports its version as 16.1.
+    if len(urllib3_version) == 2:
+        urllib3_version.append('0')
+
+    # Check urllib3 for compatibility.
+    major, minor, patch = urllib3_version  # noqa: F811
+    major, minor, patch = int(major), int(minor), int(patch)
+    # urllib3 >= 1.21.1, <= 1.25
+    assert major == 1
+    assert minor >= 21
+    assert minor <= 25
+
+    # Check chardet for compatibility.
+    major, minor, patch = chardet_version.split('.')[:3]
+    major, minor, patch = int(major), int(minor), int(patch)
+    # chardet >= 3.0.2, < 3.1.0
+    assert major == 3
+    assert minor < 1
+    assert patch >= 2
+
+
+def _check_cryptography(cryptography_version):
+    # cryptography < 1.3.4
+    try:
+        cryptography_version = list(map(int, cryptography_version.split('.')))
+    except ValueError:
+        return
+
+    if cryptography_version < [1, 3, 4]:
+        warning = 'Old version of cryptography ({}) may cause slowdown.'.format(cryptography_version)
+        warnings.warn(warning, RequestsDependencyWarning)
+
+# Check imported dependencies for compatibility.
+try:
+    check_compatibility(urllib3.__version__, chardet.__version__)
+except (AssertionError, ValueError):
+    warnings.warn("urllib3 ({}) or chardet ({}) doesn't match a supported "
+                  "version!".format(urllib3.__version__, chardet.__version__),
+                  RequestsDependencyWarning)
+
+# Attempt to enable urllib3's fallback for SNI support
+# if the standard library doesn't support SNI or the
+# 'ssl' library isn't available.
+try:
+    # Note: This logic prevents upgrading cryptography on Windows, if imported
+    #       as part of pip.
+    from pip._internal.utils.compat import WINDOWS
+    if not WINDOWS:
+        raise ImportError("pip internals: don't import cryptography on Windows")
+    try:
+        import ssl
+    except ImportError:
+        ssl = None
+
+    if not getattr(ssl, "HAS_SNI", False):
+        from pip._vendor.urllib3.contrib import pyopenssl
+        pyopenssl.inject_into_urllib3()
+
+        # Check cryptography version
+        from cryptography import __version__ as cryptography_version
+        _check_cryptography(cryptography_version)
+except ImportError:
+    pass
+
+# urllib3's DependencyWarnings should be silenced.
+from pip._vendor.urllib3.exceptions import DependencyWarning
+warnings.simplefilter('ignore', DependencyWarning)
+
+from .__version__ import __title__, __description__, __url__, __version__
+from .__version__ import __build__, __author__, __author_email__, __license__
+from .__version__ import __copyright__, __cake__
+
+from . import utils
+from . import packages
+from .models import Request, Response, PreparedRequest
+from .api import request, get, head, post, patch, put, delete, options
+from .sessions import session, Session
+from .status_codes import codes
+from .exceptions import (
+    RequestException, Timeout, URLRequired,
+    TooManyRedirects, HTTPError, ConnectionError,
+    FileModeWarning, ConnectTimeout, ReadTimeout
+)
+
+# Set default logging handler to avoid "No handler found" warnings.
+import logging
+from logging import NullHandler
+
+logging.getLogger(__name__).addHandler(NullHandler())
+
+# FileModeWarnings go off per the default.
+warnings.simplefilter('default', FileModeWarning, append=True)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/__version__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/__version__.py
new file mode 100644
index 0000000..531e26c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/__version__.py
@@ -0,0 +1,14 @@
+# .-. .-. .-. . . .-. .-. .-. .-.
+# |(  |-  |.| | | |-  `-.  |  `-.
+# ' ' `-' `-`.`-' `-' `-'  '  `-'
+
+__title__ = 'requests'
+__description__ = 'Python HTTP for Humans.'
+__url__ = 'https://requests.readthedocs.io'
+__version__ = '2.24.0'
+__build__ = 0x022400
+__author__ = 'Kenneth Reitz'
+__author_email__ = 'me@kennethreitz.org'
+__license__ = 'Apache 2.0'
+__copyright__ = 'Copyright 2020 Kenneth Reitz'
+__cake__ = u'\u2728 \U0001f370 \u2728'
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/_internal_utils.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/_internal_utils.py
new file mode 100644
index 0000000..759d9a5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/_internal_utils.py
@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests._internal_utils
+~~~~~~~~~~~~~~
+
+Provides utility functions that are consumed internally by Requests
+which depend on extremely few external helpers (such as compat)
+"""
+
+from .compat import is_py2, builtin_str, str
+
+
+def to_native_string(string, encoding='ascii'):
+    """Given a string object, regardless of type, returns a representation of
+    that string in the native string type, encoding and decoding where
+    necessary. This assumes ASCII unless told otherwise.
+    """
+    if isinstance(string, builtin_str):
+        out = string
+    else:
+        if is_py2:
+            out = string.encode(encoding)
+        else:
+            out = string.decode(encoding)
+
+    return out
+
+
+def unicode_is_ascii(u_string):
+    """Determine if unicode string only contains ASCII characters.
+
+    :param str u_string: unicode string to check. Must be unicode
+        and not Python 2 `str`.
+    :rtype: bool
+    """
+    assert isinstance(u_string, str)
+    try:
+        u_string.encode('ascii')
+        return True
+    except UnicodeEncodeError:
+        return False
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/adapters.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/adapters.py
new file mode 100644
index 0000000..c30e7c9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/adapters.py
@@ -0,0 +1,533 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.adapters
+~~~~~~~~~~~~~~~~~
+
+This module contains the transport adapters that Requests uses to define
+and maintain connections.
+"""
+
+import os.path
+import socket
+
+from pip._vendor.urllib3.poolmanager import PoolManager, proxy_from_url
+from pip._vendor.urllib3.response import HTTPResponse
+from pip._vendor.urllib3.util import parse_url
+from pip._vendor.urllib3.util import Timeout as TimeoutSauce
+from pip._vendor.urllib3.util.retry import Retry
+from pip._vendor.urllib3.exceptions import ClosedPoolError
+from pip._vendor.urllib3.exceptions import ConnectTimeoutError
+from pip._vendor.urllib3.exceptions import HTTPError as _HTTPError
+from pip._vendor.urllib3.exceptions import MaxRetryError
+from pip._vendor.urllib3.exceptions import NewConnectionError
+from pip._vendor.urllib3.exceptions import ProxyError as _ProxyError
+from pip._vendor.urllib3.exceptions import ProtocolError
+from pip._vendor.urllib3.exceptions import ReadTimeoutError
+from pip._vendor.urllib3.exceptions import SSLError as _SSLError
+from pip._vendor.urllib3.exceptions import ResponseError
+from pip._vendor.urllib3.exceptions import LocationValueError
+
+from .models import Response
+from .compat import urlparse, basestring
+from .utils import (DEFAULT_CA_BUNDLE_PATH, extract_zipped_paths,
+                    get_encoding_from_headers, prepend_scheme_if_needed,
+                    get_auth_from_url, urldefragauth, select_proxy)
+from .structures import CaseInsensitiveDict
+from .cookies import extract_cookies_to_jar
+from .exceptions import (ConnectionError, ConnectTimeout, ReadTimeout, SSLError,
+                         ProxyError, RetryError, InvalidSchema, InvalidProxyURL,
+                         InvalidURL)
+from .auth import _basic_auth_str
+
+try:
+    from pip._vendor.urllib3.contrib.socks import SOCKSProxyManager
+except ImportError:
+    def SOCKSProxyManager(*args, **kwargs):
+        raise InvalidSchema("Missing dependencies for SOCKS support.")
+
+DEFAULT_POOLBLOCK = False
+DEFAULT_POOLSIZE = 10
+DEFAULT_RETRIES = 0
+DEFAULT_POOL_TIMEOUT = None
+
+
+class BaseAdapter(object):
+    """The Base Transport Adapter"""
+
+    def __init__(self):
+        super(BaseAdapter, self).__init__()
+
+    def send(self, request, stream=False, timeout=None, verify=True,
+             cert=None, proxies=None):
+        """Sends PreparedRequest object. Returns Response object.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param stream: (optional) Whether to stream the request content.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple
+        :param verify: (optional) Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use
+        :param cert: (optional) Any user-provided SSL certificate to be trusted.
+        :param proxies: (optional) The proxies dictionary to apply to the request.
+        """
+        raise NotImplementedError
+
+    def close(self):
+        """Cleans up adapter specific items."""
+        raise NotImplementedError
+
+
+class HTTPAdapter(BaseAdapter):
+    """The built-in HTTP Adapter for urllib3.
+
+    Provides a general-case interface for Requests sessions to contact HTTP and
+    HTTPS urls by implementing the Transport Adapter interface. This class will
+    usually be created by the :class:`Session <Session>` class under the
+    covers.
+
+    :param pool_connections: The number of urllib3 connection pools to cache.
+    :param pool_maxsize: The maximum number of connections to save in the pool.
+    :param max_retries: The maximum number of retries each connection
+        should attempt. Note, this applies only to failed DNS lookups, socket
+        connections and connection timeouts, never to requests where data has
+        made it to the server. By default, Requests does not retry failed
+        connections. If you need granular control over the conditions under
+        which we retry a request, import urllib3's ``Retry`` class and pass
+        that instead.
+    :param pool_block: Whether the connection pool should block for connections.
+
+    Usage::
+
+      >>> import requests
+      >>> s = requests.Session()
+      >>> a = requests.adapters.HTTPAdapter(max_retries=3)
+      >>> s.mount('http://', a)
+    """
+    __attrs__ = ['max_retries', 'config', '_pool_connections', '_pool_maxsize',
+                 '_pool_block']
+
+    def __init__(self, pool_connections=DEFAULT_POOLSIZE,
+                 pool_maxsize=DEFAULT_POOLSIZE, max_retries=DEFAULT_RETRIES,
+                 pool_block=DEFAULT_POOLBLOCK):
+        if max_retries == DEFAULT_RETRIES:
+            self.max_retries = Retry(0, read=False)
+        else:
+            self.max_retries = Retry.from_int(max_retries)
+        self.config = {}
+        self.proxy_manager = {}
+
+        super(HTTPAdapter, self).__init__()
+
+        self._pool_connections = pool_connections
+        self._pool_maxsize = pool_maxsize
+        self._pool_block = pool_block
+
+        self.init_poolmanager(pool_connections, pool_maxsize, block=pool_block)
+
+    def __getstate__(self):
+        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
+
+    def __setstate__(self, state):
+        # Can't handle by adding 'proxy_manager' to self.__attrs__ because
+        # self.poolmanager uses a lambda function, which isn't pickleable.
+        self.proxy_manager = {}
+        self.config = {}
+
+        for attr, value in state.items():
+            setattr(self, attr, value)
+
+        self.init_poolmanager(self._pool_connections, self._pool_maxsize,
+                              block=self._pool_block)
+
+    def init_poolmanager(self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs):
+        """Initializes a urllib3 PoolManager.
+
+        This method should not be called from user code, and is only
+        exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param connections: The number of urllib3 connection pools to cache.
+        :param maxsize: The maximum number of connections to save in the pool.
+        :param block: Block when no free connections are available.
+        :param pool_kwargs: Extra keyword arguments used to initialize the Pool Manager.
+        """
+        # save these values for pickling
+        self._pool_connections = connections
+        self._pool_maxsize = maxsize
+        self._pool_block = block
+
+        self.poolmanager = PoolManager(num_pools=connections, maxsize=maxsize,
+                                       block=block, strict=True, **pool_kwargs)
+
+    def proxy_manager_for(self, proxy, **proxy_kwargs):
+        """Return urllib3 ProxyManager for the given proxy.
+
+        This method should not be called from user code, and is only
+        exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param proxy: The proxy to return a urllib3 ProxyManager for.
+        :param proxy_kwargs: Extra keyword arguments used to configure the Proxy Manager.
+        :returns: ProxyManager
+        :rtype: urllib3.ProxyManager
+        """
+        if proxy in self.proxy_manager:
+            manager = self.proxy_manager[proxy]
+        elif proxy.lower().startswith('socks'):
+            username, password = get_auth_from_url(proxy)
+            manager = self.proxy_manager[proxy] = SOCKSProxyManager(
+                proxy,
+                username=username,
+                password=password,
+                num_pools=self._pool_connections,
+                maxsize=self._pool_maxsize,
+                block=self._pool_block,
+                **proxy_kwargs
+            )
+        else:
+            proxy_headers = self.proxy_headers(proxy)
+            manager = self.proxy_manager[proxy] = proxy_from_url(
+                proxy,
+                proxy_headers=proxy_headers,
+                num_pools=self._pool_connections,
+                maxsize=self._pool_maxsize,
+                block=self._pool_block,
+                **proxy_kwargs)
+
+        return manager
+
+    def cert_verify(self, conn, url, verify, cert):
+        """Verify a SSL certificate. This method should not be called from user
+        code, and is only exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param conn: The urllib3 connection object associated with the cert.
+        :param url: The requested URL.
+        :param verify: Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use
+        :param cert: The SSL certificate to verify.
+        """
+        if url.lower().startswith('https') and verify:
+
+            cert_loc = None
+
+            # Allow self-specified cert location.
+            if verify is not True:
+                cert_loc = verify
+
+            if not cert_loc:
+                cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
+
+            if not cert_loc or not os.path.exists(cert_loc):
+                raise IOError("Could not find a suitable TLS CA certificate bundle, "
+                              "invalid path: {}".format(cert_loc))
+
+            conn.cert_reqs = 'CERT_REQUIRED'
+
+            if not os.path.isdir(cert_loc):
+                conn.ca_certs = cert_loc
+            else:
+                conn.ca_cert_dir = cert_loc
+        else:
+            conn.cert_reqs = 'CERT_NONE'
+            conn.ca_certs = None
+            conn.ca_cert_dir = None
+
+        if cert:
+            if not isinstance(cert, basestring):
+                conn.cert_file = cert[0]
+                conn.key_file = cert[1]
+            else:
+                conn.cert_file = cert
+                conn.key_file = None
+            if conn.cert_file and not os.path.exists(conn.cert_file):
+                raise IOError("Could not find the TLS certificate file, "
+                              "invalid path: {}".format(conn.cert_file))
+            if conn.key_file and not os.path.exists(conn.key_file):
+                raise IOError("Could not find the TLS key file, "
+                              "invalid path: {}".format(conn.key_file))
+
+    def build_response(self, req, resp):
+        """Builds a :class:`Response <requests.Response>` object from a urllib3
+        response. This should not be called from user code, and is only exposed
+        for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`
+
+        :param req: The :class:`PreparedRequest <PreparedRequest>` used to generate the response.
+        :param resp: The urllib3 response object.
+        :rtype: requests.Response
+        """
+        response = Response()
+
+        # Fallback to None if there's no status_code, for whatever reason.
+        response.status_code = getattr(resp, 'status', None)
+
+        # Make headers case-insensitive.
+        response.headers = CaseInsensitiveDict(getattr(resp, 'headers', {}))
+
+        # Set encoding.
+        response.encoding = get_encoding_from_headers(response.headers)
+        response.raw = resp
+        response.reason = response.raw.reason
+
+        if isinstance(req.url, bytes):
+            response.url = req.url.decode('utf-8')
+        else:
+            response.url = req.url
+
+        # Add new cookies from the server.
+        extract_cookies_to_jar(response.cookies, req, resp)
+
+        # Give the Response some context.
+        response.request = req
+        response.connection = self
+
+        return response
+
+    def get_connection(self, url, proxies=None):
+        """Returns a urllib3 connection for the given URL. This should not be
+        called from user code, and is only exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param url: The URL to connect to.
+        :param proxies: (optional) A Requests-style dictionary of proxies used on this request.
+        :rtype: urllib3.ConnectionPool
+        """
+        proxy = select_proxy(url, proxies)
+
+        if proxy:
+            proxy = prepend_scheme_if_needed(proxy, 'http')
+            proxy_url = parse_url(proxy)
+            if not proxy_url.host:
+                raise InvalidProxyURL("Please check proxy URL. It is malformed"
+                                      " and could be missing the host.")
+            proxy_manager = self.proxy_manager_for(proxy)
+            conn = proxy_manager.connection_from_url(url)
+        else:
+            # Only scheme should be lower case
+            parsed = urlparse(url)
+            url = parsed.geturl()
+            conn = self.poolmanager.connection_from_url(url)
+
+        return conn
+
+    def close(self):
+        """Disposes of any internal state.
+
+        Currently, this closes the PoolManager and any active ProxyManager,
+        which closes any pooled connections.
+        """
+        self.poolmanager.clear()
+        for proxy in self.proxy_manager.values():
+            proxy.clear()
+
+    def request_url(self, request, proxies):
+        """Obtain the url to use when making the final request.
+
+        If the message is being sent through a HTTP proxy, the full URL has to
+        be used. Otherwise, we should only use the path portion of the URL.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs.
+        :rtype: str
+        """
+        proxy = select_proxy(request.url, proxies)
+        scheme = urlparse(request.url).scheme
+
+        is_proxied_http_request = (proxy and scheme != 'https')
+        using_socks_proxy = False
+        if proxy:
+            proxy_scheme = urlparse(proxy).scheme.lower()
+            using_socks_proxy = proxy_scheme.startswith('socks')
+
+        url = request.path_url
+        if is_proxied_http_request and not using_socks_proxy:
+            url = urldefragauth(request.url)
+
+        return url
+
+    def add_headers(self, request, **kwargs):
+        """Add any headers needed by the connection. As of v2.0 this does
+        nothing by default, but is left for overriding by users that subclass
+        the :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` to add headers to.
+        :param kwargs: The keyword arguments from the call to send().
+        """
+        pass
+
+    def proxy_headers(self, proxy):
+        """Returns a dictionary of the headers to add to any request sent
+        through a proxy. This works with urllib3 magic to ensure that they are
+        correctly sent to the proxy, rather than in a tunnelled request if
+        CONNECT is being used.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param proxy: The url of the proxy being used for this request.
+        :rtype: dict
+        """
+        headers = {}
+        username, password = get_auth_from_url(proxy)
+
+        if username:
+            headers['Proxy-Authorization'] = _basic_auth_str(username,
+                                                             password)
+
+        return headers
+
+    def send(self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None):
+        """Sends PreparedRequest object. Returns Response object.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param stream: (optional) Whether to stream the request content.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple or urllib3 Timeout object
+        :param verify: (optional) Either a boolean, in which case it controls whether
+            we verify the server's TLS certificate, or a string, in which case it
+            must be a path to a CA bundle to use
+        :param cert: (optional) Any user-provided SSL certificate to be trusted.
+        :param proxies: (optional) The proxies dictionary to apply to the request.
+        :rtype: requests.Response
+        """
+
+        try:
+            conn = self.get_connection(request.url, proxies)
+        except LocationValueError as e:
+            raise InvalidURL(e, request=request)
+
+        self.cert_verify(conn, request.url, verify, cert)
+        url = self.request_url(request, proxies)
+        self.add_headers(request, stream=stream, timeout=timeout, verify=verify, cert=cert, proxies=proxies)
+
+        chunked = not (request.body is None or 'Content-Length' in request.headers)
+
+        if isinstance(timeout, tuple):
+            try:
+                connect, read = timeout
+                timeout = TimeoutSauce(connect=connect, read=read)
+            except ValueError as e:
+                # this may raise a string formatting error.
+                err = ("Invalid timeout {}. Pass a (connect, read) "
+                       "timeout tuple, or a single float to set "
+                       "both timeouts to the same value".format(timeout))
+                raise ValueError(err)
+        elif isinstance(timeout, TimeoutSauce):
+            pass
+        else:
+            timeout = TimeoutSauce(connect=timeout, read=timeout)
+
+        try:
+            if not chunked:
+                resp = conn.urlopen(
+                    method=request.method,
+                    url=url,
+                    body=request.body,
+                    headers=request.headers,
+                    redirect=False,
+                    assert_same_host=False,
+                    preload_content=False,
+                    decode_content=False,
+                    retries=self.max_retries,
+                    timeout=timeout
+                )
+
+            # Send the request.
+            else:
+                if hasattr(conn, 'proxy_pool'):
+                    conn = conn.proxy_pool
+
+                low_conn = conn._get_conn(timeout=DEFAULT_POOL_TIMEOUT)
+
+                try:
+                    low_conn.putrequest(request.method,
+                                        url,
+                                        skip_accept_encoding=True)
+
+                    for header, value in request.headers.items():
+                        low_conn.putheader(header, value)
+
+                    low_conn.endheaders()
+
+                    for i in request.body:
+                        low_conn.send(hex(len(i))[2:].encode('utf-8'))
+                        low_conn.send(b'\r\n')
+                        low_conn.send(i)
+                        low_conn.send(b'\r\n')
+                    low_conn.send(b'0\r\n\r\n')
+
+                    # Receive the response from the server
+                    try:
+                        # For Python 2.7, use buffering of HTTP responses
+                        r = low_conn.getresponse(buffering=True)
+                    except TypeError:
+                        # For compatibility with Python 3.3+
+                        r = low_conn.getresponse()
+
+                    resp = HTTPResponse.from_httplib(
+                        r,
+                        pool=conn,
+                        connection=low_conn,
+                        preload_content=False,
+                        decode_content=False
+                    )
+                except:
+                    # If we hit any problems here, clean up the connection.
+                    # Then, reraise so that we can handle the actual exception.
+                    low_conn.close()
+                    raise
+
+        except (ProtocolError, socket.error) as err:
+            raise ConnectionError(err, request=request)
+
+        except MaxRetryError as e:
+            if isinstance(e.reason, ConnectTimeoutError):
+                # TODO: Remove this in 3.0.0: see #2811
+                if not isinstance(e.reason, NewConnectionError):
+                    raise ConnectTimeout(e, request=request)
+
+            if isinstance(e.reason, ResponseError):
+                raise RetryError(e, request=request)
+
+            if isinstance(e.reason, _ProxyError):
+                raise ProxyError(e, request=request)
+
+            if isinstance(e.reason, _SSLError):
+                # This branch is for urllib3 v1.22 and later.
+                raise SSLError(e, request=request)
+
+            raise ConnectionError(e, request=request)
+
+        except ClosedPoolError as e:
+            raise ConnectionError(e, request=request)
+
+        except _ProxyError as e:
+            raise ProxyError(e)
+
+        except (_SSLError, _HTTPError) as e:
+            if isinstance(e, _SSLError):
+                # This branch is for urllib3 versions earlier than v1.22
+                raise SSLError(e, request=request)
+            elif isinstance(e, ReadTimeoutError):
+                raise ReadTimeout(e, request=request)
+            else:
+                raise
+
+        return self.build_response(request, resp)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/api.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/api.py
new file mode 100644
index 0000000..e978e20
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/api.py
@@ -0,0 +1,161 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.api
+~~~~~~~~~~~~
+
+This module implements the Requests API.
+
+:copyright: (c) 2012 by Kenneth Reitz.
+:license: Apache2, see LICENSE for more details.
+"""
+
+from . import sessions
+
+
+def request(method, url, **kwargs):
+    """Constructs and sends a :class:`Request <Request>`.
+
+    :param method: method for the new :class:`Request` object: ``GET``, ``OPTIONS``, ``HEAD``, ``POST``, ``PUT``, ``PATCH``, or ``DELETE``.
+    :param url: URL for the new :class:`Request` object.
+    :param params: (optional) Dictionary, list of tuples or bytes to send
+        in the query string for the :class:`Request`.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) A JSON serializable Python object to send in the body of the :class:`Request`.
+    :param headers: (optional) Dictionary of HTTP Headers to send with the :class:`Request`.
+    :param cookies: (optional) Dict or CookieJar object to send with the :class:`Request`.
+    :param files: (optional) Dictionary of ``'name': file-like-objects`` (or ``{'name': file-tuple}``) for multipart encoding upload.
+        ``file-tuple`` can be a 2-tuple ``('filename', fileobj)``, 3-tuple ``('filename', fileobj, 'content_type')``
+        or a 4-tuple ``('filename', fileobj, 'content_type', custom_headers)``, where ``'content-type'`` is a string
+        defining the content type of the given file and ``custom_headers`` a dict-like object containing additional headers
+        to add for the file.
+    :param auth: (optional) Auth tuple to enable Basic/Digest/Custom HTTP Auth.
+    :param timeout: (optional) How many seconds to wait for the server to send data
+        before giving up, as a float, or a :ref:`(connect timeout, read
+        timeout) <timeouts>` tuple.
+    :type timeout: float or tuple
+    :param allow_redirects: (optional) Boolean. Enable/disable GET/OPTIONS/POST/PUT/PATCH/DELETE/HEAD redirection. Defaults to ``True``.
+    :type allow_redirects: bool
+    :param proxies: (optional) Dictionary mapping protocol to the URL of the proxy.
+    :param verify: (optional) Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use. Defaults to ``True``.
+    :param stream: (optional) if ``False``, the response content will be immediately downloaded.
+    :param cert: (optional) if String, path to ssl client cert file (.pem). If Tuple, ('cert', 'key') pair.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+
+    Usage::
+
+      >>> import requests
+      >>> req = requests.request('GET', 'https://httpbin.org/get')
+      >>> req
+      <Response [200]>
+    """
+
+    # By using the 'with' statement we are sure the session is closed, thus we
+    # avoid leaving sockets open which can trigger a ResourceWarning in some
+    # cases, and look like a memory leak in others.
+    with sessions.Session() as session:
+        return session.request(method=method, url=url, **kwargs)
+
+
+def get(url, params=None, **kwargs):
+    r"""Sends a GET request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param params: (optional) Dictionary, list of tuples or bytes to send
+        in the query string for the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    kwargs.setdefault('allow_redirects', True)
+    return request('get', url, params=params, **kwargs)
+
+
+def options(url, **kwargs):
+    r"""Sends an OPTIONS request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    kwargs.setdefault('allow_redirects', True)
+    return request('options', url, **kwargs)
+
+
+def head(url, **kwargs):
+    r"""Sends a HEAD request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param \*\*kwargs: Optional arguments that ``request`` takes. If
+        `allow_redirects` is not provided, it will be set to `False` (as
+        opposed to the default :meth:`request` behavior).
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    kwargs.setdefault('allow_redirects', False)
+    return request('head', url, **kwargs)
+
+
+def post(url, data=None, json=None, **kwargs):
+    r"""Sends a POST request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request('post', url, data=data, json=json, **kwargs)
+
+
+def put(url, data=None, **kwargs):
+    r"""Sends a PUT request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request('put', url, data=data, **kwargs)
+
+
+def patch(url, data=None, **kwargs):
+    r"""Sends a PATCH request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request('patch', url, data=data, **kwargs)
+
+
+def delete(url, **kwargs):
+    r"""Sends a DELETE request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request('delete', url, **kwargs)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/auth.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/auth.py
new file mode 100644
index 0000000..eeface3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/auth.py
@@ -0,0 +1,305 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.auth
+~~~~~~~~~~~~~
+
+This module contains the authentication handlers for Requests.
+"""
+
+import os
+import re
+import time
+import hashlib
+import threading
+import warnings
+
+from base64 import b64encode
+
+from .compat import urlparse, str, basestring
+from .cookies import extract_cookies_to_jar
+from ._internal_utils import to_native_string
+from .utils import parse_dict_header
+
+CONTENT_TYPE_FORM_URLENCODED = 'application/x-www-form-urlencoded'
+CONTENT_TYPE_MULTI_PART = 'multipart/form-data'
+
+
+def _basic_auth_str(username, password):
+    """Returns a Basic Auth string."""
+
+    # "I want us to put a big-ol' comment on top of it that
+    # says that this behaviour is dumb but we need to preserve
+    # it because people are relying on it."
+    #    - Lukasa
+    #
+    # These are here solely to maintain backwards compatibility
+    # for things like ints. This will be removed in 3.0.0.
+    if not isinstance(username, basestring):
+        warnings.warn(
+            "Non-string usernames will no longer be supported in Requests "
+            "3.0.0. Please convert the object you've passed in ({!r}) to "
+            "a string or bytes object in the near future to avoid "
+            "problems.".format(username),
+            category=DeprecationWarning,
+        )
+        username = str(username)
+
+    if not isinstance(password, basestring):
+        warnings.warn(
+            "Non-string passwords will no longer be supported in Requests "
+            "3.0.0. Please convert the object you've passed in ({!r}) to "
+            "a string or bytes object in the near future to avoid "
+            "problems.".format(type(password)),
+            category=DeprecationWarning,
+        )
+        password = str(password)
+    # -- End Removal --
+
+    if isinstance(username, str):
+        username = username.encode('latin1')
+
+    if isinstance(password, str):
+        password = password.encode('latin1')
+
+    authstr = 'Basic ' + to_native_string(
+        b64encode(b':'.join((username, password))).strip()
+    )
+
+    return authstr
+
+
+class AuthBase(object):
+    """Base class that all auth implementations derive from"""
+
+    def __call__(self, r):
+        raise NotImplementedError('Auth hooks must be callable.')
+
+
+class HTTPBasicAuth(AuthBase):
+    """Attaches HTTP Basic Authentication to the given Request object."""
+
+    def __init__(self, username, password):
+        self.username = username
+        self.password = password
+
+    def __eq__(self, other):
+        return all([
+            self.username == getattr(other, 'username', None),
+            self.password == getattr(other, 'password', None)
+        ])
+
+    def __ne__(self, other):
+        return not self == other
+
+    def __call__(self, r):
+        r.headers['Authorization'] = _basic_auth_str(self.username, self.password)
+        return r
+
+
+class HTTPProxyAuth(HTTPBasicAuth):
+    """Attaches HTTP Proxy Authentication to a given Request object."""
+
+    def __call__(self, r):
+        r.headers['Proxy-Authorization'] = _basic_auth_str(self.username, self.password)
+        return r
+
+
+class HTTPDigestAuth(AuthBase):
+    """Attaches HTTP Digest Authentication to the given Request object."""
+
+    def __init__(self, username, password):
+        self.username = username
+        self.password = password
+        # Keep state in per-thread local storage
+        self._thread_local = threading.local()
+
+    def init_per_thread_state(self):
+        # Ensure state is initialized just once per-thread
+        if not hasattr(self._thread_local, 'init'):
+            self._thread_local.init = True
+            self._thread_local.last_nonce = ''
+            self._thread_local.nonce_count = 0
+            self._thread_local.chal = {}
+            self._thread_local.pos = None
+            self._thread_local.num_401_calls = None
+
+    def build_digest_header(self, method, url):
+        """
+        :rtype: str
+        """
+
+        realm = self._thread_local.chal['realm']
+        nonce = self._thread_local.chal['nonce']
+        qop = self._thread_local.chal.get('qop')
+        algorithm = self._thread_local.chal.get('algorithm')
+        opaque = self._thread_local.chal.get('opaque')
+        hash_utf8 = None
+
+        if algorithm is None:
+            _algorithm = 'MD5'
+        else:
+            _algorithm = algorithm.upper()
+        # lambdas assume digest modules are imported at the top level
+        if _algorithm == 'MD5' or _algorithm == 'MD5-SESS':
+            def md5_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode('utf-8')
+                return hashlib.md5(x).hexdigest()
+            hash_utf8 = md5_utf8
+        elif _algorithm == 'SHA':
+            def sha_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode('utf-8')
+                return hashlib.sha1(x).hexdigest()
+            hash_utf8 = sha_utf8
+        elif _algorithm == 'SHA-256':
+            def sha256_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode('utf-8')
+                return hashlib.sha256(x).hexdigest()
+            hash_utf8 = sha256_utf8
+        elif _algorithm == 'SHA-512':
+            def sha512_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode('utf-8')
+                return hashlib.sha512(x).hexdigest()
+            hash_utf8 = sha512_utf8
+
+        KD = lambda s, d: hash_utf8("%s:%s" % (s, d))
+
+        if hash_utf8 is None:
+            return None
+
+        # XXX not implemented yet
+        entdig = None
+        p_parsed = urlparse(url)
+        #: path is request-uri defined in RFC 2616 which should not be empty
+        path = p_parsed.path or "/"
+        if p_parsed.query:
+            path += '?' + p_parsed.query
+
+        A1 = '%s:%s:%s' % (self.username, realm, self.password)
+        A2 = '%s:%s' % (method, path)
+
+        HA1 = hash_utf8(A1)
+        HA2 = hash_utf8(A2)
+
+        if nonce == self._thread_local.last_nonce:
+            self._thread_local.nonce_count += 1
+        else:
+            self._thread_local.nonce_count = 1
+        ncvalue = '%08x' % self._thread_local.nonce_count
+        s = str(self._thread_local.nonce_count).encode('utf-8')
+        s += nonce.encode('utf-8')
+        s += time.ctime().encode('utf-8')
+        s += os.urandom(8)
+
+        cnonce = (hashlib.sha1(s).hexdigest()[:16])
+        if _algorithm == 'MD5-SESS':
+            HA1 = hash_utf8('%s:%s:%s' % (HA1, nonce, cnonce))
+
+        if not qop:
+            respdig = KD(HA1, "%s:%s" % (nonce, HA2))
+        elif qop == 'auth' or 'auth' in qop.split(','):
+            noncebit = "%s:%s:%s:%s:%s" % (
+                nonce, ncvalue, cnonce, 'auth', HA2
+            )
+            respdig = KD(HA1, noncebit)
+        else:
+            # XXX handle auth-int.
+            return None
+
+        self._thread_local.last_nonce = nonce
+
+        # XXX should the partial digests be encoded too?
+        base = 'username="%s", realm="%s", nonce="%s", uri="%s", ' \
+               'response="%s"' % (self.username, realm, nonce, path, respdig)
+        if opaque:
+            base += ', opaque="%s"' % opaque
+        if algorithm:
+            base += ', algorithm="%s"' % algorithm
+        if entdig:
+            base += ', digest="%s"' % entdig
+        if qop:
+            base += ', qop="auth", nc=%s, cnonce="%s"' % (ncvalue, cnonce)
+
+        return 'Digest %s' % (base)
+
+    def handle_redirect(self, r, **kwargs):
+        """Reset num_401_calls counter on redirects."""
+        if r.is_redirect:
+            self._thread_local.num_401_calls = 1
+
+    def handle_401(self, r, **kwargs):
+        """
+        Takes the given response and tries digest-auth, if needed.
+
+        :rtype: requests.Response
+        """
+
+        # If response is not 4xx, do not auth
+        # See https://github.com/psf/requests/issues/3772
+        if not 400 <= r.status_code < 500:
+            self._thread_local.num_401_calls = 1
+            return r
+
+        if self._thread_local.pos is not None:
+            # Rewind the file position indicator of the body to where
+            # it was to resend the request.
+            r.request.body.seek(self._thread_local.pos)
+        s_auth = r.headers.get('www-authenticate', '')
+
+        if 'digest' in s_auth.lower() and self._thread_local.num_401_calls < 2:
+
+            self._thread_local.num_401_calls += 1
+            pat = re.compile(r'digest ', flags=re.IGNORECASE)
+            self._thread_local.chal = parse_dict_header(pat.sub('', s_auth, count=1))
+
+            # Consume content and release the original connection
+            # to allow our new request to reuse the same one.
+            r.content
+            r.close()
+            prep = r.request.copy()
+            extract_cookies_to_jar(prep._cookies, r.request, r.raw)
+            prep.prepare_cookies(prep._cookies)
+
+            prep.headers['Authorization'] = self.build_digest_header(
+                prep.method, prep.url)
+            _r = r.connection.send(prep, **kwargs)
+            _r.history.append(r)
+            _r.request = prep
+
+            return _r
+
+        self._thread_local.num_401_calls = 1
+        return r
+
+    def __call__(self, r):
+        # Initialize per-thread state, if needed
+        self.init_per_thread_state()
+        # If we have a saved nonce, skip the 401
+        if self._thread_local.last_nonce:
+            r.headers['Authorization'] = self.build_digest_header(r.method, r.url)
+        try:
+            self._thread_local.pos = r.body.tell()
+        except AttributeError:
+            # In the case of HTTPDigestAuth being reused and the body of
+            # the previous request was a file-like object, pos has the
+            # file position of the previous body. Ensure it's set to
+            # None.
+            self._thread_local.pos = None
+        r.register_hook('response', self.handle_401)
+        r.register_hook('response', self.handle_redirect)
+        self._thread_local.num_401_calls = 1
+
+        return r
+
+    def __eq__(self, other):
+        return all([
+            self.username == getattr(other, 'username', None),
+            self.password == getattr(other, 'password', None)
+        ])
+
+    def __ne__(self, other):
+        return not self == other
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/certs.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/certs.py
new file mode 100644
index 0000000..06a594e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/certs.py
@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+requests.certs
+~~~~~~~~~~~~~~
+
+This module returns the preferred default CA certificate bundle. There is
+only one — the one from the certifi package.
+
+If you are packaging Requests, e.g., for a Linux distribution or a managed
+environment, you can change the definition of where() to return a separately
+packaged CA bundle.
+"""
+from pip._vendor.certifi import where
+
+if __name__ == '__main__':
+    print(where())
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/compat.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/compat.py
new file mode 100644
index 0000000..9e29371
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/compat.py
@@ -0,0 +1,76 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.compat
+~~~~~~~~~~~~~~~
+
+This module handles import compatibility issues between Python 2 and
+Python 3.
+"""
+
+from pip._vendor import chardet
+
+import sys
+
+# -------
+# Pythons
+# -------
+
+# Syntax sugar.
+_ver = sys.version_info
+
+#: Python 2.x?
+is_py2 = (_ver[0] == 2)
+
+#: Python 3.x?
+is_py3 = (_ver[0] == 3)
+
+# Note: We've patched out simplejson support in pip because it prevents
+#       upgrading simplejson on Windows.
+# try:
+#     import simplejson as json
+# except (ImportError, SyntaxError):
+#     # simplejson does not support Python 3.2, it throws a SyntaxError
+#     # because of u'...' Unicode literals.
+import json
+
+# ---------
+# Specifics
+# ---------
+
+if is_py2:
+    from urllib import (
+        quote, unquote, quote_plus, unquote_plus, urlencode, getproxies,
+        proxy_bypass, proxy_bypass_environment, getproxies_environment)
+    from urlparse import urlparse, urlunparse, urljoin, urlsplit, urldefrag
+    from urllib2 import parse_http_list
+    import cookielib
+    from Cookie import Morsel
+    from StringIO import StringIO
+    # Keep OrderedDict for backwards compatibility.
+    from collections import Callable, Mapping, MutableMapping, OrderedDict
+
+
+    builtin_str = str
+    bytes = str
+    str = unicode
+    basestring = basestring
+    numeric_types = (int, long, float)
+    integer_types = (int, long)
+
+elif is_py3:
+    from urllib.parse import urlparse, urlunparse, urljoin, urlsplit, urlencode, quote, unquote, quote_plus, unquote_plus, urldefrag
+    from urllib.request import parse_http_list, getproxies, proxy_bypass, proxy_bypass_environment, getproxies_environment
+    from http import cookiejar as cookielib
+    from http.cookies import Morsel
+    from io import StringIO
+    # Keep OrderedDict for backwards compatibility.
+    from collections import OrderedDict
+    from collections.abc import Callable, Mapping, MutableMapping
+
+    builtin_str = str
+    str = str
+    bytes = bytes
+    basestring = (str, bytes)
+    numeric_types = (int, float)
+    integer_types = (int,)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/cookies.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/cookies.py
new file mode 100644
index 0000000..56fccd9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/cookies.py
@@ -0,0 +1,549 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.cookies
+~~~~~~~~~~~~~~~~
+
+Compatibility code to be able to use `cookielib.CookieJar` with requests.
+
+requests.utils imports from here, so be careful with imports.
+"""
+
+import copy
+import time
+import calendar
+
+from ._internal_utils import to_native_string
+from .compat import cookielib, urlparse, urlunparse, Morsel, MutableMapping
+
+try:
+    import threading
+except ImportError:
+    import dummy_threading as threading
+
+
+class MockRequest(object):
+    """Wraps a `requests.Request` to mimic a `urllib2.Request`.
+
+    The code in `cookielib.CookieJar` expects this interface in order to correctly
+    manage cookie policies, i.e., determine whether a cookie can be set, given the
+    domains of the request and the cookie.
+
+    The original request object is read-only. The client is responsible for collecting
+    the new headers via `get_new_headers()` and interpreting them appropriately. You
+    probably want `get_cookie_header`, defined below.
+    """
+
+    def __init__(self, request):
+        self._r = request
+        self._new_headers = {}
+        self.type = urlparse(self._r.url).scheme
+
+    def get_type(self):
+        return self.type
+
+    def get_host(self):
+        return urlparse(self._r.url).netloc
+
+    def get_origin_req_host(self):
+        return self.get_host()
+
+    def get_full_url(self):
+        # Only return the response's URL if the user hadn't set the Host
+        # header
+        if not self._r.headers.get('Host'):
+            return self._r.url
+        # If they did set it, retrieve it and reconstruct the expected domain
+        host = to_native_string(self._r.headers['Host'], encoding='utf-8')
+        parsed = urlparse(self._r.url)
+        # Reconstruct the URL as we expect it
+        return urlunparse([
+            parsed.scheme, host, parsed.path, parsed.params, parsed.query,
+            parsed.fragment
+        ])
+
+    def is_unverifiable(self):
+        return True
+
+    def has_header(self, name):
+        return name in self._r.headers or name in self._new_headers
+
+    def get_header(self, name, default=None):
+        return self._r.headers.get(name, self._new_headers.get(name, default))
+
+    def add_header(self, key, val):
+        """cookielib has no legitimate use for this method; add it back if you find one."""
+        raise NotImplementedError("Cookie headers should be added with add_unredirected_header()")
+
+    def add_unredirected_header(self, name, value):
+        self._new_headers[name] = value
+
+    def get_new_headers(self):
+        return self._new_headers
+
+    @property
+    def unverifiable(self):
+        return self.is_unverifiable()
+
+    @property
+    def origin_req_host(self):
+        return self.get_origin_req_host()
+
+    @property
+    def host(self):
+        return self.get_host()
+
+
+class MockResponse(object):
+    """Wraps a `httplib.HTTPMessage` to mimic a `urllib.addinfourl`.
+
+    ...what? Basically, expose the parsed HTTP headers from the server response
+    the way `cookielib` expects to see them.
+    """
+
+    def __init__(self, headers):
+        """Make a MockResponse for `cookielib` to read.
+
+        :param headers: a httplib.HTTPMessage or analogous carrying the headers
+        """
+        self._headers = headers
+
+    def info(self):
+        return self._headers
+
+    def getheaders(self, name):
+        self._headers.getheaders(name)
+
+
+def extract_cookies_to_jar(jar, request, response):
+    """Extract the cookies from the response into a CookieJar.
+
+    :param jar: cookielib.CookieJar (not necessarily a RequestsCookieJar)
+    :param request: our own requests.Request object
+    :param response: urllib3.HTTPResponse object
+    """
+    if not (hasattr(response, '_original_response') and
+            response._original_response):
+        return
+    # the _original_response field is the wrapped httplib.HTTPResponse object,
+    req = MockRequest(request)
+    # pull out the HTTPMessage with the headers and put it in the mock:
+    res = MockResponse(response._original_response.msg)
+    jar.extract_cookies(res, req)
+
+
+def get_cookie_header(jar, request):
+    """
+    Produce an appropriate Cookie header string to be sent with `request`, or None.
+
+    :rtype: str
+    """
+    r = MockRequest(request)
+    jar.add_cookie_header(r)
+    return r.get_new_headers().get('Cookie')
+
+
+def remove_cookie_by_name(cookiejar, name, domain=None, path=None):
+    """Unsets a cookie by name, by default over all domains and paths.
+
+    Wraps CookieJar.clear(), is O(n).
+    """
+    clearables = []
+    for cookie in cookiejar:
+        if cookie.name != name:
+            continue
+        if domain is not None and domain != cookie.domain:
+            continue
+        if path is not None and path != cookie.path:
+            continue
+        clearables.append((cookie.domain, cookie.path, cookie.name))
+
+    for domain, path, name in clearables:
+        cookiejar.clear(domain, path, name)
+
+
+class CookieConflictError(RuntimeError):
+    """There are two cookies that meet the criteria specified in the cookie jar.
+    Use .get and .set and include domain and path args in order to be more specific.
+    """
+
+
+class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
+    """Compatibility class; is a cookielib.CookieJar, but exposes a dict
+    interface.
+
+    This is the CookieJar we create by default for requests and sessions that
+    don't specify one, since some clients may expect response.cookies and
+    session.cookies to support dict operations.
+
+    Requests does not use the dict interface internally; it's just for
+    compatibility with external client code. All requests code should work
+    out of the box with externally provided instances of ``CookieJar``, e.g.
+    ``LWPCookieJar`` and ``FileCookieJar``.
+
+    Unlike a regular CookieJar, this class is pickleable.
+
+    .. warning:: dictionary operations that are normally O(1) may be O(n).
+    """
+
+    def get(self, name, default=None, domain=None, path=None):
+        """Dict-like get() that also supports optional domain and path args in
+        order to resolve naming collisions from using one cookie jar over
+        multiple domains.
+
+        .. warning:: operation is O(n), not O(1).
+        """
+        try:
+            return self._find_no_duplicates(name, domain, path)
+        except KeyError:
+            return default
+
+    def set(self, name, value, **kwargs):
+        """Dict-like set() that also supports optional domain and path args in
+        order to resolve naming collisions from using one cookie jar over
+        multiple domains.
+        """
+        # support client code that unsets cookies by assignment of a None value:
+        if value is None:
+            remove_cookie_by_name(self, name, domain=kwargs.get('domain'), path=kwargs.get('path'))
+            return
+
+        if isinstance(value, Morsel):
+            c = morsel_to_cookie(value)
+        else:
+            c = create_cookie(name, value, **kwargs)
+        self.set_cookie(c)
+        return c
+
+    def iterkeys(self):
+        """Dict-like iterkeys() that returns an iterator of names of cookies
+        from the jar.
+
+        .. seealso:: itervalues() and iteritems().
+        """
+        for cookie in iter(self):
+            yield cookie.name
+
+    def keys(self):
+        """Dict-like keys() that returns a list of names of cookies from the
+        jar.
+
+        .. seealso:: values() and items().
+        """
+        return list(self.iterkeys())
+
+    def itervalues(self):
+        """Dict-like itervalues() that returns an iterator of values of cookies
+        from the jar.
+
+        .. seealso:: iterkeys() and iteritems().
+        """
+        for cookie in iter(self):
+            yield cookie.value
+
+    def values(self):
+        """Dict-like values() that returns a list of values of cookies from the
+        jar.
+
+        .. seealso:: keys() and items().
+        """
+        return list(self.itervalues())
+
+    def iteritems(self):
+        """Dict-like iteritems() that returns an iterator of name-value tuples
+        from the jar.
+
+        .. seealso:: iterkeys() and itervalues().
+        """
+        for cookie in iter(self):
+            yield cookie.name, cookie.value
+
+    def items(self):
+        """Dict-like items() that returns a list of name-value tuples from the
+        jar. Allows client-code to call ``dict(RequestsCookieJar)`` and get a
+        vanilla python dict of key value pairs.
+
+        .. seealso:: keys() and values().
+        """
+        return list(self.iteritems())
+
+    def list_domains(self):
+        """Utility method to list all the domains in the jar."""
+        domains = []
+        for cookie in iter(self):
+            if cookie.domain not in domains:
+                domains.append(cookie.domain)
+        return domains
+
+    def list_paths(self):
+        """Utility method to list all the paths in the jar."""
+        paths = []
+        for cookie in iter(self):
+            if cookie.path not in paths:
+                paths.append(cookie.path)
+        return paths
+
+    def multiple_domains(self):
+        """Returns True if there are multiple domains in the jar.
+        Returns False otherwise.
+
+        :rtype: bool
+        """
+        domains = []
+        for cookie in iter(self):
+            if cookie.domain is not None and cookie.domain in domains:
+                return True
+            domains.append(cookie.domain)
+        return False  # there is only one domain in jar
+
+    def get_dict(self, domain=None, path=None):
+        """Takes as an argument an optional domain and path and returns a plain
+        old Python dict of name-value pairs of cookies that meet the
+        requirements.
+
+        :rtype: dict
+        """
+        dictionary = {}
+        for cookie in iter(self):
+            if (
+                (domain is None or cookie.domain == domain) and
+                (path is None or cookie.path == path)
+            ):
+                dictionary[cookie.name] = cookie.value
+        return dictionary
+
+    def __contains__(self, name):
+        try:
+            return super(RequestsCookieJar, self).__contains__(name)
+        except CookieConflictError:
+            return True
+
+    def __getitem__(self, name):
+        """Dict-like __getitem__() for compatibility with client code. Throws
+        exception if there are more than one cookie with name. In that case,
+        use the more explicit get() method instead.
+
+        .. warning:: operation is O(n), not O(1).
+        """
+        return self._find_no_duplicates(name)
+
+    def __setitem__(self, name, value):
+        """Dict-like __setitem__ for compatibility with client code. Throws
+        exception if there is already a cookie of that name in the jar. In that
+        case, use the more explicit set() method instead.
+        """
+        self.set(name, value)
+
+    def __delitem__(self, name):
+        """Deletes a cookie given a name. Wraps ``cookielib.CookieJar``'s
+        ``remove_cookie_by_name()``.
+        """
+        remove_cookie_by_name(self, name)
+
+    def set_cookie(self, cookie, *args, **kwargs):
+        if hasattr(cookie.value, 'startswith') and cookie.value.startswith('"') and cookie.value.endswith('"'):
+            cookie.value = cookie.value.replace('\\"', '')
+        return super(RequestsCookieJar, self).set_cookie(cookie, *args, **kwargs)
+
+    def update(self, other):
+        """Updates this jar with cookies from another CookieJar or dict-like"""
+        if isinstance(other, cookielib.CookieJar):
+            for cookie in other:
+                self.set_cookie(copy.copy(cookie))
+        else:
+            super(RequestsCookieJar, self).update(other)
+
+    def _find(self, name, domain=None, path=None):
+        """Requests uses this method internally to get cookie values.
+
+        If there are conflicting cookies, _find arbitrarily chooses one.
+        See _find_no_duplicates if you want an exception thrown if there are
+        conflicting cookies.
+
+        :param name: a string containing name of cookie
+        :param domain: (optional) string containing domain of cookie
+        :param path: (optional) string containing path of cookie
+        :return: cookie.value
+        """
+        for cookie in iter(self):
+            if cookie.name == name:
+                if domain is None or cookie.domain == domain:
+                    if path is None or cookie.path == path:
+                        return cookie.value
+
+        raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
+
+    def _find_no_duplicates(self, name, domain=None, path=None):
+        """Both ``__get_item__`` and ``get`` call this function: it's never
+        used elsewhere in Requests.
+
+        :param name: a string containing name of cookie
+        :param domain: (optional) string containing domain of cookie
+        :param path: (optional) string containing path of cookie
+        :raises KeyError: if cookie is not found
+        :raises CookieConflictError: if there are multiple cookies
+            that match name and optionally domain and path
+        :return: cookie.value
+        """
+        toReturn = None
+        for cookie in iter(self):
+            if cookie.name == name:
+                if domain is None or cookie.domain == domain:
+                    if path is None or cookie.path == path:
+                        if toReturn is not None:  # if there are multiple cookies that meet passed in criteria
+                            raise CookieConflictError('There are multiple cookies with name, %r' % (name))
+                        toReturn = cookie.value  # we will eventually return this as long as no cookie conflict
+
+        if toReturn:
+            return toReturn
+        raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
+
+    def __getstate__(self):
+        """Unlike a normal CookieJar, this class is pickleable."""
+        state = self.__dict__.copy()
+        # remove the unpickleable RLock object
+        state.pop('_cookies_lock')
+        return state
+
+    def __setstate__(self, state):
+        """Unlike a normal CookieJar, this class is pickleable."""
+        self.__dict__.update(state)
+        if '_cookies_lock' not in self.__dict__:
+            self._cookies_lock = threading.RLock()
+
+    def copy(self):
+        """Return a copy of this RequestsCookieJar."""
+        new_cj = RequestsCookieJar()
+        new_cj.set_policy(self.get_policy())
+        new_cj.update(self)
+        return new_cj
+
+    def get_policy(self):
+        """Return the CookiePolicy instance used."""
+        return self._policy
+
+
+def _copy_cookie_jar(jar):
+    if jar is None:
+        return None
+
+    if hasattr(jar, 'copy'):
+        # We're dealing with an instance of RequestsCookieJar
+        return jar.copy()
+    # We're dealing with a generic CookieJar instance
+    new_jar = copy.copy(jar)
+    new_jar.clear()
+    for cookie in jar:
+        new_jar.set_cookie(copy.copy(cookie))
+    return new_jar
+
+
+def create_cookie(name, value, **kwargs):
+    """Make a cookie from underspecified parameters.
+
+    By default, the pair of `name` and `value` will be set for the domain ''
+    and sent on every request (this is sometimes called a "supercookie").
+    """
+    result = {
+        'version': 0,
+        'name': name,
+        'value': value,
+        'port': None,
+        'domain': '',
+        'path': '/',
+        'secure': False,
+        'expires': None,
+        'discard': True,
+        'comment': None,
+        'comment_url': None,
+        'rest': {'HttpOnly': None},
+        'rfc2109': False,
+    }
+
+    badargs = set(kwargs) - set(result)
+    if badargs:
+        err = 'create_cookie() got unexpected keyword arguments: %s'
+        raise TypeError(err % list(badargs))
+
+    result.update(kwargs)
+    result['port_specified'] = bool(result['port'])
+    result['domain_specified'] = bool(result['domain'])
+    result['domain_initial_dot'] = result['domain'].startswith('.')
+    result['path_specified'] = bool(result['path'])
+
+    return cookielib.Cookie(**result)
+
+
+def morsel_to_cookie(morsel):
+    """Convert a Morsel object into a Cookie containing the one k/v pair."""
+
+    expires = None
+    if morsel['max-age']:
+        try:
+            expires = int(time.time() + int(morsel['max-age']))
+        except ValueError:
+            raise TypeError('max-age: %s must be integer' % morsel['max-age'])
+    elif morsel['expires']:
+        time_template = '%a, %d-%b-%Y %H:%M:%S GMT'
+        expires = calendar.timegm(
+            time.strptime(morsel['expires'], time_template)
+        )
+    return create_cookie(
+        comment=morsel['comment'],
+        comment_url=bool(morsel['comment']),
+        discard=False,
+        domain=morsel['domain'],
+        expires=expires,
+        name=morsel.key,
+        path=morsel['path'],
+        port=None,
+        rest={'HttpOnly': morsel['httponly']},
+        rfc2109=False,
+        secure=bool(morsel['secure']),
+        value=morsel.value,
+        version=morsel['version'] or 0,
+    )
+
+
+def cookiejar_from_dict(cookie_dict, cookiejar=None, overwrite=True):
+    """Returns a CookieJar from a key/value dictionary.
+
+    :param cookie_dict: Dict of key/values to insert into CookieJar.
+    :param cookiejar: (optional) A cookiejar to add the cookies to.
+    :param overwrite: (optional) If False, will not replace cookies
+        already in the jar with new ones.
+    :rtype: CookieJar
+    """
+    if cookiejar is None:
+        cookiejar = RequestsCookieJar()
+
+    if cookie_dict is not None:
+        names_from_jar = [cookie.name for cookie in cookiejar]
+        for name in cookie_dict:
+            if overwrite or (name not in names_from_jar):
+                cookiejar.set_cookie(create_cookie(name, cookie_dict[name]))
+
+    return cookiejar
+
+
+def merge_cookies(cookiejar, cookies):
+    """Add cookies to cookiejar and returns a merged CookieJar.
+
+    :param cookiejar: CookieJar object to add the cookies to.
+    :param cookies: Dictionary or CookieJar object to be added.
+    :rtype: CookieJar
+    """
+    if not isinstance(cookiejar, cookielib.CookieJar):
+        raise ValueError('You can only merge into CookieJar')
+
+    if isinstance(cookies, dict):
+        cookiejar = cookiejar_from_dict(
+            cookies, cookiejar=cookiejar, overwrite=False)
+    elif isinstance(cookies, cookielib.CookieJar):
+        try:
+            cookiejar.update(cookies)
+        except AttributeError:
+            for cookie_in_jar in cookies:
+                cookiejar.set_cookie(cookie_in_jar)
+
+    return cookiejar
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/exceptions.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/exceptions.py
new file mode 100644
index 0000000..9ef9e6e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/exceptions.py
@@ -0,0 +1,123 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.exceptions
+~~~~~~~~~~~~~~~~~~~
+
+This module contains the set of Requests' exceptions.
+"""
+from pip._vendor.urllib3.exceptions import HTTPError as BaseHTTPError
+
+
+class RequestException(IOError):
+    """There was an ambiguous exception that occurred while handling your
+    request.
+    """
+
+    def __init__(self, *args, **kwargs):
+        """Initialize RequestException with `request` and `response` objects."""
+        response = kwargs.pop('response', None)
+        self.response = response
+        self.request = kwargs.pop('request', None)
+        if (response is not None and not self.request and
+                hasattr(response, 'request')):
+            self.request = self.response.request
+        super(RequestException, self).__init__(*args, **kwargs)
+
+
+class HTTPError(RequestException):
+    """An HTTP error occurred."""
+
+
+class ConnectionError(RequestException):
+    """A Connection error occurred."""
+
+
+class ProxyError(ConnectionError):
+    """A proxy error occurred."""
+
+
+class SSLError(ConnectionError):
+    """An SSL error occurred."""
+
+
+class Timeout(RequestException):
+    """The request timed out.
+
+    Catching this error will catch both
+    :exc:`~requests.exceptions.ConnectTimeout` and
+    :exc:`~requests.exceptions.ReadTimeout` errors.
+    """
+
+
+class ConnectTimeout(ConnectionError, Timeout):
+    """The request timed out while trying to connect to the remote server.
+
+    Requests that produced this error are safe to retry.
+    """
+
+
+class ReadTimeout(Timeout):
+    """The server did not send any data in the allotted amount of time."""
+
+
+class URLRequired(RequestException):
+    """A valid URL is required to make a request."""
+
+
+class TooManyRedirects(RequestException):
+    """Too many redirects."""
+
+
+class MissingSchema(RequestException, ValueError):
+    """The URL schema (e.g. http or https) is missing."""
+
+
+class InvalidSchema(RequestException, ValueError):
+    """See defaults.py for valid schemas."""
+
+
+class InvalidURL(RequestException, ValueError):
+    """The URL provided was somehow invalid."""
+
+
+class InvalidHeader(RequestException, ValueError):
+    """The header value provided was somehow invalid."""
+
+
+class InvalidProxyURL(InvalidURL):
+    """The proxy URL provided is invalid."""
+
+
+class ChunkedEncodingError(RequestException):
+    """The server declared chunked encoding but sent an invalid chunk."""
+
+
+class ContentDecodingError(RequestException, BaseHTTPError):
+    """Failed to decode response content."""
+
+
+class StreamConsumedError(RequestException, TypeError):
+    """The content for this response was already consumed."""
+
+
+class RetryError(RequestException):
+    """Custom retries logic failed"""
+
+
+class UnrewindableBodyError(RequestException):
+    """Requests encountered an error when trying to rewind a body."""
+
+# Warnings
+
+
+class RequestsWarning(Warning):
+    """Base warning for Requests."""
+
+
+class FileModeWarning(RequestsWarning, DeprecationWarning):
+    """A file was opened in text mode, but Requests determined its binary length."""
+
+
+class RequestsDependencyWarning(RequestsWarning):
+    """An imported dependency doesn't match the expected version range."""
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/help.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/help.py
new file mode 100644
index 0000000..3c3072b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/help.py
@@ -0,0 +1,119 @@
+"""Module containing bug report helper(s)."""
+from __future__ import print_function
+
+import json
+import platform
+import sys
+import ssl
+
+from pip._vendor import idna
+from pip._vendor import urllib3
+from pip._vendor import chardet
+
+from . import __version__ as requests_version
+
+try:
+    from pip._vendor.urllib3.contrib import pyopenssl
+except ImportError:
+    pyopenssl = None
+    OpenSSL = None
+    cryptography = None
+else:
+    import OpenSSL
+    import cryptography
+
+
+def _implementation():
+    """Return a dict with the Python implementation and version.
+
+    Provide both the name and the version of the Python implementation
+    currently running. For example, on CPython 2.7.5 it will return
+    {'name': 'CPython', 'version': '2.7.5'}.
+
+    This function works best on CPython and PyPy: in particular, it probably
+    doesn't work for Jython or IronPython. Future investigation should be done
+    to work out the correct shape of the code for those platforms.
+    """
+    implementation = platform.python_implementation()
+
+    if implementation == 'CPython':
+        implementation_version = platform.python_version()
+    elif implementation == 'PyPy':
+        implementation_version = '%s.%s.%s' % (sys.pypy_version_info.major,
+                                               sys.pypy_version_info.minor,
+                                               sys.pypy_version_info.micro)
+        if sys.pypy_version_info.releaselevel != 'final':
+            implementation_version = ''.join([
+                implementation_version, sys.pypy_version_info.releaselevel
+            ])
+    elif implementation == 'Jython':
+        implementation_version = platform.python_version()  # Complete Guess
+    elif implementation == 'IronPython':
+        implementation_version = platform.python_version()  # Complete Guess
+    else:
+        implementation_version = 'Unknown'
+
+    return {'name': implementation, 'version': implementation_version}
+
+
+def info():
+    """Generate information for a bug report."""
+    try:
+        platform_info = {
+            'system': platform.system(),
+            'release': platform.release(),
+        }
+    except IOError:
+        platform_info = {
+            'system': 'Unknown',
+            'release': 'Unknown',
+        }
+
+    implementation_info = _implementation()
+    urllib3_info = {'version': urllib3.__version__}
+    chardet_info = {'version': chardet.__version__}
+
+    pyopenssl_info = {
+        'version': None,
+        'openssl_version': '',
+    }
+    if OpenSSL:
+        pyopenssl_info = {
+            'version': OpenSSL.__version__,
+            'openssl_version': '%x' % OpenSSL.SSL.OPENSSL_VERSION_NUMBER,
+        }
+    cryptography_info = {
+        'version': getattr(cryptography, '__version__', ''),
+    }
+    idna_info = {
+        'version': getattr(idna, '__version__', ''),
+    }
+
+    system_ssl = ssl.OPENSSL_VERSION_NUMBER
+    system_ssl_info = {
+        'version': '%x' % system_ssl if system_ssl is not None else ''
+    }
+
+    return {
+        'platform': platform_info,
+        'implementation': implementation_info,
+        'system_ssl': system_ssl_info,
+        'using_pyopenssl': pyopenssl is not None,
+        'pyOpenSSL': pyopenssl_info,
+        'urllib3': urllib3_info,
+        'chardet': chardet_info,
+        'cryptography': cryptography_info,
+        'idna': idna_info,
+        'requests': {
+            'version': requests_version,
+        },
+    }
+
+
+def main():
+    """Pretty-print the bug information as JSON."""
+    print(json.dumps(info(), sort_keys=True, indent=2))
+
+
+if __name__ == '__main__':
+    main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/hooks.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/hooks.py
new file mode 100644
index 0000000..7a51f21
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/hooks.py
@@ -0,0 +1,34 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.hooks
+~~~~~~~~~~~~~~
+
+This module provides the capabilities for the Requests hooks system.
+
+Available hooks:
+
+``response``:
+    The response generated from a Request.
+"""
+HOOKS = ['response']
+
+
+def default_hooks():
+    return {event: [] for event in HOOKS}
+
+# TODO: response is the only one
+
+
+def dispatch_hook(key, hooks, hook_data, **kwargs):
+    """Dispatches a hook dictionary on a given piece of data."""
+    hooks = hooks or {}
+    hooks = hooks.get(key)
+    if hooks:
+        if hasattr(hooks, '__call__'):
+            hooks = [hooks]
+        for hook in hooks:
+            _hook_data = hook(hook_data, **kwargs)
+            if _hook_data is not None:
+                hook_data = _hook_data
+    return hook_data
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/models.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/models.py
new file mode 100644
index 0000000..015e715
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/models.py
@@ -0,0 +1,954 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.models
+~~~~~~~~~~~~~~~
+
+This module contains the primary objects that power Requests.
+"""
+
+import datetime
+import sys
+
+# Import encoding now, to avoid implicit import later.
+# Implicit import within threads may cause LookupError when standard library is in a ZIP,
+# such as in Embedded Python. See https://github.com/psf/requests/issues/3578.
+import encodings.idna
+
+from pip._vendor.urllib3.fields import RequestField
+from pip._vendor.urllib3.filepost import encode_multipart_formdata
+from pip._vendor.urllib3.util import parse_url
+from pip._vendor.urllib3.exceptions import (
+    DecodeError, ReadTimeoutError, ProtocolError, LocationParseError)
+
+from io import UnsupportedOperation
+from .hooks import default_hooks
+from .structures import CaseInsensitiveDict
+
+from .auth import HTTPBasicAuth
+from .cookies import cookiejar_from_dict, get_cookie_header, _copy_cookie_jar
+from .exceptions import (
+    HTTPError, MissingSchema, InvalidURL, ChunkedEncodingError,
+    ContentDecodingError, ConnectionError, StreamConsumedError)
+from ._internal_utils import to_native_string, unicode_is_ascii
+from .utils import (
+    guess_filename, get_auth_from_url, requote_uri,
+    stream_decode_response_unicode, to_key_val_list, parse_header_links,
+    iter_slices, guess_json_utf, super_len, check_header_validity)
+from .compat import (
+    Callable, Mapping,
+    cookielib, urlunparse, urlsplit, urlencode, str, bytes,
+    is_py2, chardet, builtin_str, basestring)
+from .compat import json as complexjson
+from .status_codes import codes
+
+#: The set of HTTP status codes that indicate an automatically
+#: processable redirect.
+REDIRECT_STATI = (
+    codes.moved,               # 301
+    codes.found,               # 302
+    codes.other,               # 303
+    codes.temporary_redirect,  # 307
+    codes.permanent_redirect,  # 308
+)
+
+DEFAULT_REDIRECT_LIMIT = 30
+CONTENT_CHUNK_SIZE = 10 * 1024
+ITER_CHUNK_SIZE = 512
+
+
+class RequestEncodingMixin(object):
+    @property
+    def path_url(self):
+        """Build the path URL to use."""
+
+        url = []
+
+        p = urlsplit(self.url)
+
+        path = p.path
+        if not path:
+            path = '/'
+
+        url.append(path)
+
+        query = p.query
+        if query:
+            url.append('?')
+            url.append(query)
+
+        return ''.join(url)
+
+    @staticmethod
+    def _encode_params(data):
+        """Encode parameters in a piece of data.
+
+        Will successfully encode parameters when passed as a dict or a list of
+        2-tuples. Order is retained if data is a list of 2-tuples but arbitrary
+        if parameters are supplied as a dict.
+        """
+
+        if isinstance(data, (str, bytes)):
+            return data
+        elif hasattr(data, 'read'):
+            return data
+        elif hasattr(data, '__iter__'):
+            result = []
+            for k, vs in to_key_val_list(data):
+                if isinstance(vs, basestring) or not hasattr(vs, '__iter__'):
+                    vs = [vs]
+                for v in vs:
+                    if v is not None:
+                        result.append(
+                            (k.encode('utf-8') if isinstance(k, str) else k,
+                             v.encode('utf-8') if isinstance(v, str) else v))
+            return urlencode(result, doseq=True)
+        else:
+            return data
+
+    @staticmethod
+    def _encode_files(files, data):
+        """Build the body for a multipart/form-data request.
+
+        Will successfully encode files when passed as a dict or a list of
+        tuples. Order is retained if data is a list of tuples but arbitrary
+        if parameters are supplied as a dict.
+        The tuples may be 2-tuples (filename, fileobj), 3-tuples (filename, fileobj, contentype)
+        or 4-tuples (filename, fileobj, contentype, custom_headers).
+        """
+        if (not files):
+            raise ValueError("Files must be provided.")
+        elif isinstance(data, basestring):
+            raise ValueError("Data must not be a string.")
+
+        new_fields = []
+        fields = to_key_val_list(data or {})
+        files = to_key_val_list(files or {})
+
+        for field, val in fields:
+            if isinstance(val, basestring) or not hasattr(val, '__iter__'):
+                val = [val]
+            for v in val:
+                if v is not None:
+                    # Don't call str() on bytestrings: in Py3 it all goes wrong.
+                    if not isinstance(v, bytes):
+                        v = str(v)
+
+                    new_fields.append(
+                        (field.decode('utf-8') if isinstance(field, bytes) else field,
+                         v.encode('utf-8') if isinstance(v, str) else v))
+
+        for (k, v) in files:
+            # support for explicit filename
+            ft = None
+            fh = None
+            if isinstance(v, (tuple, list)):
+                if len(v) == 2:
+                    fn, fp = v
+                elif len(v) == 3:
+                    fn, fp, ft = v
+                else:
+                    fn, fp, ft, fh = v
+            else:
+                fn = guess_filename(v) or k
+                fp = v
+
+            if isinstance(fp, (str, bytes, bytearray)):
+                fdata = fp
+            elif hasattr(fp, 'read'):
+                fdata = fp.read()
+            elif fp is None:
+                continue
+            else:
+                fdata = fp
+
+            rf = RequestField(name=k, data=fdata, filename=fn, headers=fh)
+            rf.make_multipart(content_type=ft)
+            new_fields.append(rf)
+
+        body, content_type = encode_multipart_formdata(new_fields)
+
+        return body, content_type
+
+
+class RequestHooksMixin(object):
+    def register_hook(self, event, hook):
+        """Properly register a hook."""
+
+        if event not in self.hooks:
+            raise ValueError('Unsupported event specified, with event name "%s"' % (event))
+
+        if isinstance(hook, Callable):
+            self.hooks[event].append(hook)
+        elif hasattr(hook, '__iter__'):
+            self.hooks[event].extend(h for h in hook if isinstance(h, Callable))
+
+    def deregister_hook(self, event, hook):
+        """Deregister a previously registered hook.
+        Returns True if the hook existed, False if not.
+        """
+
+        try:
+            self.hooks[event].remove(hook)
+            return True
+        except ValueError:
+            return False
+
+
+class Request(RequestHooksMixin):
+    """A user-created :class:`Request <Request>` object.
+
+    Used to prepare a :class:`PreparedRequest <PreparedRequest>`, which is sent to the server.
+
+    :param method: HTTP method to use.
+    :param url: URL to send.
+    :param headers: dictionary of headers to send.
+    :param files: dictionary of {filename: fileobject} files to multipart upload.
+    :param data: the body to attach to the request. If a dictionary or
+        list of tuples ``[(key, value)]`` is provided, form-encoding will
+        take place.
+    :param json: json for the body to attach to the request (if files or data is not specified).
+    :param params: URL parameters to append to the URL. If a dictionary or
+        list of tuples ``[(key, value)]`` is provided, form-encoding will
+        take place.
+    :param auth: Auth handler or (user, pass) tuple.
+    :param cookies: dictionary or CookieJar of cookies to attach to this request.
+    :param hooks: dictionary of callback hooks, for internal usage.
+
+    Usage::
+
+      >>> import requests
+      >>> req = requests.Request('GET', 'https://httpbin.org/get')
+      >>> req.prepare()
+      <PreparedRequest [GET]>
+    """
+
+    def __init__(self,
+            method=None, url=None, headers=None, files=None, data=None,
+            params=None, auth=None, cookies=None, hooks=None, json=None):
+
+        # Default empty dicts for dict params.
+        data = [] if data is None else data
+        files = [] if files is None else files
+        headers = {} if headers is None else headers
+        params = {} if params is None else params
+        hooks = {} if hooks is None else hooks
+
+        self.hooks = default_hooks()
+        for (k, v) in list(hooks.items()):
+            self.register_hook(event=k, hook=v)
+
+        self.method = method
+        self.url = url
+        self.headers = headers
+        self.files = files
+        self.data = data
+        self.json = json
+        self.params = params
+        self.auth = auth
+        self.cookies = cookies
+
+    def __repr__(self):
+        return '<Request [%s]>' % (self.method)
+
+    def prepare(self):
+        """Constructs a :class:`PreparedRequest <PreparedRequest>` for transmission and returns it."""
+        p = PreparedRequest()
+        p.prepare(
+            method=self.method,
+            url=self.url,
+            headers=self.headers,
+            files=self.files,
+            data=self.data,
+            json=self.json,
+            params=self.params,
+            auth=self.auth,
+            cookies=self.cookies,
+            hooks=self.hooks,
+        )
+        return p
+
+
+class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
+    """The fully mutable :class:`PreparedRequest <PreparedRequest>` object,
+    containing the exact bytes that will be sent to the server.
+
+    Generated from either a :class:`Request <Request>` object or manually.
+
+    Usage::
+
+      >>> import requests
+      >>> req = requests.Request('GET', 'https://httpbin.org/get')
+      >>> r = req.prepare()
+      >>> r
+      <PreparedRequest [GET]>
+
+      >>> s = requests.Session()
+      >>> s.send(r)
+      <Response [200]>
+    """
+
+    def __init__(self):
+        #: HTTP verb to send to the server.
+        self.method = None
+        #: HTTP URL to send the request to.
+        self.url = None
+        #: dictionary of HTTP headers.
+        self.headers = None
+        # The `CookieJar` used to create the Cookie header will be stored here
+        # after prepare_cookies is called
+        self._cookies = None
+        #: request body to send to the server.
+        self.body = None
+        #: dictionary of callback hooks, for internal usage.
+        self.hooks = default_hooks()
+        #: integer denoting starting position of a readable file-like body.
+        self._body_position = None
+
+    def prepare(self,
+            method=None, url=None, headers=None, files=None, data=None,
+            params=None, auth=None, cookies=None, hooks=None, json=None):
+        """Prepares the entire request with the given parameters."""
+
+        self.prepare_method(method)
+        self.prepare_url(url, params)
+        self.prepare_headers(headers)
+        self.prepare_cookies(cookies)
+        self.prepare_body(data, files, json)
+        self.prepare_auth(auth, url)
+
+        # Note that prepare_auth must be last to enable authentication schemes
+        # such as OAuth to work on a fully prepared request.
+
+        # This MUST go after prepare_auth. Authenticators could add a hook
+        self.prepare_hooks(hooks)
+
+    def __repr__(self):
+        return '<PreparedRequest [%s]>' % (self.method)
+
+    def copy(self):
+        p = PreparedRequest()
+        p.method = self.method
+        p.url = self.url
+        p.headers = self.headers.copy() if self.headers is not None else None
+        p._cookies = _copy_cookie_jar(self._cookies)
+        p.body = self.body
+        p.hooks = self.hooks
+        p._body_position = self._body_position
+        return p
+
+    def prepare_method(self, method):
+        """Prepares the given HTTP method."""
+        self.method = method
+        if self.method is not None:
+            self.method = to_native_string(self.method.upper())
+
+    @staticmethod
+    def _get_idna_encoded_host(host):
+        from pip._vendor import idna
+
+        try:
+            host = idna.encode(host, uts46=True).decode('utf-8')
+        except idna.IDNAError:
+            raise UnicodeError
+        return host
+
+    def prepare_url(self, url, params):
+        """Prepares the given HTTP URL."""
+        #: Accept objects that have string representations.
+        #: We're unable to blindly call unicode/str functions
+        #: as this will include the bytestring indicator (b'')
+        #: on python 3.x.
+        #: https://github.com/psf/requests/pull/2238
+        if isinstance(url, bytes):
+            url = url.decode('utf8')
+        else:
+            url = unicode(url) if is_py2 else str(url)
+
+        # Remove leading whitespaces from url
+        url = url.lstrip()
+
+        # Don't do any URL preparation for non-HTTP schemes like `mailto`,
+        # `data` etc to work around exceptions from `url_parse`, which
+        # handles RFC 3986 only.
+        if ':' in url and not url.lower().startswith('http'):
+            self.url = url
+            return
+
+        # Support for unicode domain names and paths.
+        try:
+            scheme, auth, host, port, path, query, fragment = parse_url(url)
+        except LocationParseError as e:
+            raise InvalidURL(*e.args)
+
+        if not scheme:
+            error = ("Invalid URL {0!r}: No schema supplied. Perhaps you meant http://{0}?")
+            error = error.format(to_native_string(url, 'utf8'))
+
+            raise MissingSchema(error)
+
+        if not host:
+            raise InvalidURL("Invalid URL %r: No host supplied" % url)
+
+        # In general, we want to try IDNA encoding the hostname if the string contains
+        # non-ASCII characters. This allows users to automatically get the correct IDNA
+        # behaviour. For strings containing only ASCII characters, we need to also verify
+        # it doesn't start with a wildcard (*), before allowing the unencoded hostname.
+        if not unicode_is_ascii(host):
+            try:
+                host = self._get_idna_encoded_host(host)
+            except UnicodeError:
+                raise InvalidURL('URL has an invalid label.')
+        elif host.startswith(u'*'):
+            raise InvalidURL('URL has an invalid label.')
+
+        # Carefully reconstruct the network location
+        netloc = auth or ''
+        if netloc:
+            netloc += '@'
+        netloc += host
+        if port:
+            netloc += ':' + str(port)
+
+        # Bare domains aren't valid URLs.
+        if not path:
+            path = '/'
+
+        if is_py2:
+            if isinstance(scheme, str):
+                scheme = scheme.encode('utf-8')
+            if isinstance(netloc, str):
+                netloc = netloc.encode('utf-8')
+            if isinstance(path, str):
+                path = path.encode('utf-8')
+            if isinstance(query, str):
+                query = query.encode('utf-8')
+            if isinstance(fragment, str):
+                fragment = fragment.encode('utf-8')
+
+        if isinstance(params, (str, bytes)):
+            params = to_native_string(params)
+
+        enc_params = self._encode_params(params)
+        if enc_params:
+            if query:
+                query = '%s&%s' % (query, enc_params)
+            else:
+                query = enc_params
+
+        url = requote_uri(urlunparse([scheme, netloc, path, None, query, fragment]))
+        self.url = url
+
+    def prepare_headers(self, headers):
+        """Prepares the given HTTP headers."""
+
+        self.headers = CaseInsensitiveDict()
+        if headers:
+            for header in headers.items():
+                # Raise exception on invalid header value.
+                check_header_validity(header)
+                name, value = header
+                self.headers[to_native_string(name)] = value
+
+    def prepare_body(self, data, files, json=None):
+        """Prepares the given HTTP body data."""
+
+        # Check if file, fo, generator, iterator.
+        # If not, run through normal process.
+
+        # Nottin' on you.
+        body = None
+        content_type = None
+
+        if not data and json is not None:
+            # urllib3 requires a bytes-like body. Python 2's json.dumps
+            # provides this natively, but Python 3 gives a Unicode string.
+            content_type = 'application/json'
+            body = complexjson.dumps(json)
+            if not isinstance(body, bytes):
+                body = body.encode('utf-8')
+
+        is_stream = all([
+            hasattr(data, '__iter__'),
+            not isinstance(data, (basestring, list, tuple, Mapping))
+        ])
+
+        if is_stream:
+            try:
+                length = super_len(data)
+            except (TypeError, AttributeError, UnsupportedOperation):
+                length = None
+
+            body = data
+
+            if getattr(body, 'tell', None) is not None:
+                # Record the current file position before reading.
+                # This will allow us to rewind a file in the event
+                # of a redirect.
+                try:
+                    self._body_position = body.tell()
+                except (IOError, OSError):
+                    # This differentiates from None, allowing us to catch
+                    # a failed `tell()` later when trying to rewind the body
+                    self._body_position = object()
+
+            if files:
+                raise NotImplementedError('Streamed bodies and files are mutually exclusive.')
+
+            if length:
+                self.headers['Content-Length'] = builtin_str(length)
+            else:
+                self.headers['Transfer-Encoding'] = 'chunked'
+        else:
+            # Multi-part file uploads.
+            if files:
+                (body, content_type) = self._encode_files(files, data)
+            else:
+                if data:
+                    body = self._encode_params(data)
+                    if isinstance(data, basestring) or hasattr(data, 'read'):
+                        content_type = None
+                    else:
+                        content_type = 'application/x-www-form-urlencoded'
+
+            self.prepare_content_length(body)
+
+            # Add content-type if it wasn't explicitly provided.
+            if content_type and ('content-type' not in self.headers):
+                self.headers['Content-Type'] = content_type
+
+        self.body = body
+
+    def prepare_content_length(self, body):
+        """Prepare Content-Length header based on request method and body"""
+        if body is not None:
+            length = super_len(body)
+            if length:
+                # If length exists, set it. Otherwise, we fallback
+                # to Transfer-Encoding: chunked.
+                self.headers['Content-Length'] = builtin_str(length)
+        elif self.method not in ('GET', 'HEAD') and self.headers.get('Content-Length') is None:
+            # Set Content-Length to 0 for methods that can have a body
+            # but don't provide one. (i.e. not GET or HEAD)
+            self.headers['Content-Length'] = '0'
+
+    def prepare_auth(self, auth, url=''):
+        """Prepares the given HTTP auth data."""
+
+        # If no Auth is explicitly provided, extract it from the URL first.
+        if auth is None:
+            url_auth = get_auth_from_url(self.url)
+            auth = url_auth if any(url_auth) else None
+
+        if auth:
+            if isinstance(auth, tuple) and len(auth) == 2:
+                # special-case basic HTTP auth
+                auth = HTTPBasicAuth(*auth)
+
+            # Allow auth to make its changes.
+            r = auth(self)
+
+            # Update self to reflect the auth changes.
+            self.__dict__.update(r.__dict__)
+
+            # Recompute Content-Length
+            self.prepare_content_length(self.body)
+
+    def prepare_cookies(self, cookies):
+        """Prepares the given HTTP cookie data.
+
+        This function eventually generates a ``Cookie`` header from the
+        given cookies using cookielib. Due to cookielib's design, the header
+        will not be regenerated if it already exists, meaning this function
+        can only be called once for the life of the
+        :class:`PreparedRequest <PreparedRequest>` object. Any subsequent calls
+        to ``prepare_cookies`` will have no actual effect, unless the "Cookie"
+        header is removed beforehand.
+        """
+        if isinstance(cookies, cookielib.CookieJar):
+            self._cookies = cookies
+        else:
+            self._cookies = cookiejar_from_dict(cookies)
+
+        cookie_header = get_cookie_header(self._cookies, self)
+        if cookie_header is not None:
+            self.headers['Cookie'] = cookie_header
+
+    def prepare_hooks(self, hooks):
+        """Prepares the given hooks."""
+        # hooks can be passed as None to the prepare method and to this
+        # method. To prevent iterating over None, simply use an empty list
+        # if hooks is False-y
+        hooks = hooks or []
+        for event in hooks:
+            self.register_hook(event, hooks[event])
+
+
+class Response(object):
+    """The :class:`Response <Response>` object, which contains a
+    server's response to an HTTP request.
+    """
+
+    __attrs__ = [
+        '_content', 'status_code', 'headers', 'url', 'history',
+        'encoding', 'reason', 'cookies', 'elapsed', 'request'
+    ]
+
+    def __init__(self):
+        self._content = False
+        self._content_consumed = False
+        self._next = None
+
+        #: Integer Code of responded HTTP Status, e.g. 404 or 200.
+        self.status_code = None
+
+        #: Case-insensitive Dictionary of Response Headers.
+        #: For example, ``headers['content-encoding']`` will return the
+        #: value of a ``'Content-Encoding'`` response header.
+        self.headers = CaseInsensitiveDict()
+
+        #: File-like object representation of response (for advanced usage).
+        #: Use of ``raw`` requires that ``stream=True`` be set on the request.
+        #: This requirement does not apply for use internally to Requests.
+        self.raw = None
+
+        #: Final URL location of Response.
+        self.url = None
+
+        #: Encoding to decode with when accessing r.text.
+        self.encoding = None
+
+        #: A list of :class:`Response <Response>` objects from
+        #: the history of the Request. Any redirect responses will end
+        #: up here. The list is sorted from the oldest to the most recent request.
+        self.history = []
+
+        #: Textual reason of responded HTTP Status, e.g. "Not Found" or "OK".
+        self.reason = None
+
+        #: A CookieJar of Cookies the server sent back.
+        self.cookies = cookiejar_from_dict({})
+
+        #: The amount of time elapsed between sending the request
+        #: and the arrival of the response (as a timedelta).
+        #: This property specifically measures the time taken between sending
+        #: the first byte of the request and finishing parsing the headers. It
+        #: is therefore unaffected by consuming the response content or the
+        #: value of the ``stream`` keyword argument.
+        self.elapsed = datetime.timedelta(0)
+
+        #: The :class:`PreparedRequest <PreparedRequest>` object to which this
+        #: is a response.
+        self.request = None
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        self.close()
+
+    def __getstate__(self):
+        # Consume everything; accessing the content attribute makes
+        # sure the content has been fully read.
+        if not self._content_consumed:
+            self.content
+
+        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
+
+    def __setstate__(self, state):
+        for name, value in state.items():
+            setattr(self, name, value)
+
+        # pickled objects do not have .raw
+        setattr(self, '_content_consumed', True)
+        setattr(self, 'raw', None)
+
+    def __repr__(self):
+        return '<Response [%s]>' % (self.status_code)
+
+    def __bool__(self):
+        """Returns True if :attr:`status_code` is less than 400.
+
+        This attribute checks if the status code of the response is between
+        400 and 600 to see if there was a client error or a server error. If
+        the status code, is between 200 and 400, this will return True. This
+        is **not** a check to see if the response code is ``200 OK``.
+        """
+        return self.ok
+
+    def __nonzero__(self):
+        """Returns True if :attr:`status_code` is less than 400.
+
+        This attribute checks if the status code of the response is between
+        400 and 600 to see if there was a client error or a server error. If
+        the status code, is between 200 and 400, this will return True. This
+        is **not** a check to see if the response code is ``200 OK``.
+        """
+        return self.ok
+
+    def __iter__(self):
+        """Allows you to use a response as an iterator."""
+        return self.iter_content(128)
+
+    @property
+    def ok(self):
+        """Returns True if :attr:`status_code` is less than 400, False if not.
+
+        This attribute checks if the status code of the response is between
+        400 and 600 to see if there was a client error or a server error. If
+        the status code is between 200 and 400, this will return True. This
+        is **not** a check to see if the response code is ``200 OK``.
+        """
+        try:
+            self.raise_for_status()
+        except HTTPError:
+            return False
+        return True
+
+    @property
+    def is_redirect(self):
+        """True if this Response is a well-formed HTTP redirect that could have
+        been processed automatically (by :meth:`Session.resolve_redirects`).
+        """
+        return ('location' in self.headers and self.status_code in REDIRECT_STATI)
+
+    @property
+    def is_permanent_redirect(self):
+        """True if this Response one of the permanent versions of redirect."""
+        return ('location' in self.headers and self.status_code in (codes.moved_permanently, codes.permanent_redirect))
+
+    @property
+    def next(self):
+        """Returns a PreparedRequest for the next request in a redirect chain, if there is one."""
+        return self._next
+
+    @property
+    def apparent_encoding(self):
+        """The apparent encoding, provided by the chardet library."""
+        return chardet.detect(self.content)['encoding']
+
+    def iter_content(self, chunk_size=1, decode_unicode=False):
+        """Iterates over the response data.  When stream=True is set on the
+        request, this avoids reading the content at once into memory for
+        large responses.  The chunk size is the number of bytes it should
+        read into memory.  This is not necessarily the length of each item
+        returned as decoding can take place.
+
+        chunk_size must be of type int or None. A value of None will
+        function differently depending on the value of `stream`.
+        stream=True will read data as it arrives in whatever size the
+        chunks are received. If stream=False, data is returned as
+        a single chunk.
+
+        If decode_unicode is True, content will be decoded using the best
+        available encoding based on the response.
+        """
+
+        def generate():
+            # Special case for urllib3.
+            if hasattr(self.raw, 'stream'):
+                try:
+                    for chunk in self.raw.stream(chunk_size, decode_content=True):
+                        yield chunk
+                except ProtocolError as e:
+                    raise ChunkedEncodingError(e)
+                except DecodeError as e:
+                    raise ContentDecodingError(e)
+                except ReadTimeoutError as e:
+                    raise ConnectionError(e)
+            else:
+                # Standard file-like object.
+                while True:
+                    chunk = self.raw.read(chunk_size)
+                    if not chunk:
+                        break
+                    yield chunk
+
+            self._content_consumed = True
+
+        if self._content_consumed and isinstance(self._content, bool):
+            raise StreamConsumedError()
+        elif chunk_size is not None and not isinstance(chunk_size, int):
+            raise TypeError("chunk_size must be an int, it is instead a %s." % type(chunk_size))
+        # simulate reading small chunks of the content
+        reused_chunks = iter_slices(self._content, chunk_size)
+
+        stream_chunks = generate()
+
+        chunks = reused_chunks if self._content_consumed else stream_chunks
+
+        if decode_unicode:
+            chunks = stream_decode_response_unicode(chunks, self)
+
+        return chunks
+
+    def iter_lines(self, chunk_size=ITER_CHUNK_SIZE, decode_unicode=False, delimiter=None):
+        """Iterates over the response data, one line at a time.  When
+        stream=True is set on the request, this avoids reading the
+        content at once into memory for large responses.
+
+        .. note:: This method is not reentrant safe.
+        """
+
+        pending = None
+
+        for chunk in self.iter_content(chunk_size=chunk_size, decode_unicode=decode_unicode):
+
+            if pending is not None:
+                chunk = pending + chunk
+
+            if delimiter:
+                lines = chunk.split(delimiter)
+            else:
+                lines = chunk.splitlines()
+
+            if lines and lines[-1] and chunk and lines[-1][-1] == chunk[-1]:
+                pending = lines.pop()
+            else:
+                pending = None
+
+            for line in lines:
+                yield line
+
+        if pending is not None:
+            yield pending
+
+    @property
+    def content(self):
+        """Content of the response, in bytes."""
+
+        if self._content is False:
+            # Read the contents.
+            if self._content_consumed:
+                raise RuntimeError(
+                    'The content for this response was already consumed')
+
+            if self.status_code == 0 or self.raw is None:
+                self._content = None
+            else:
+                self._content = b''.join(self.iter_content(CONTENT_CHUNK_SIZE)) or b''
+
+        self._content_consumed = True
+        # don't need to release the connection; that's been handled by urllib3
+        # since we exhausted the data.
+        return self._content
+
+    @property
+    def text(self):
+        """Content of the response, in unicode.
+
+        If Response.encoding is None, encoding will be guessed using
+        ``chardet``.
+
+        The encoding of the response content is determined based solely on HTTP
+        headers, following RFC 2616 to the letter. If you can take advantage of
+        non-HTTP knowledge to make a better guess at the encoding, you should
+        set ``r.encoding`` appropriately before accessing this property.
+        """
+
+        # Try charset from content-type
+        content = None
+        encoding = self.encoding
+
+        if not self.content:
+            return str('')
+
+        # Fallback to auto-detected encoding.
+        if self.encoding is None:
+            encoding = self.apparent_encoding
+
+        # Decode unicode from given encoding.
+        try:
+            content = str(self.content, encoding, errors='replace')
+        except (LookupError, TypeError):
+            # A LookupError is raised if the encoding was not found which could
+            # indicate a misspelling or similar mistake.
+            #
+            # A TypeError can be raised if encoding is None
+            #
+            # So we try blindly encoding.
+            content = str(self.content, errors='replace')
+
+        return content
+
+    def json(self, **kwargs):
+        r"""Returns the json-encoded content of a response, if any.
+
+        :param \*\*kwargs: Optional arguments that ``json.loads`` takes.
+        :raises ValueError: If the response body does not contain valid json.
+        """
+
+        if not self.encoding and self.content and len(self.content) > 3:
+            # No encoding set. JSON RFC 4627 section 3 states we should expect
+            # UTF-8, -16 or -32. Detect which one to use; If the detection or
+            # decoding fails, fall back to `self.text` (using chardet to make
+            # a best guess).
+            encoding = guess_json_utf(self.content)
+            if encoding is not None:
+                try:
+                    return complexjson.loads(
+                        self.content.decode(encoding), **kwargs
+                    )
+                except UnicodeDecodeError:
+                    # Wrong UTF codec detected; usually because it's not UTF-8
+                    # but some other 8-bit codec.  This is an RFC violation,
+                    # and the server didn't bother to tell us what codec *was*
+                    # used.
+                    pass
+        return complexjson.loads(self.text, **kwargs)
+
+    @property
+    def links(self):
+        """Returns the parsed header links of the response, if any."""
+
+        header = self.headers.get('link')
+
+        # l = MultiDict()
+        l = {}
+
+        if header:
+            links = parse_header_links(header)
+
+            for link in links:
+                key = link.get('rel') or link.get('url')
+                l[key] = link
+
+        return l
+
+    def raise_for_status(self):
+        """Raises :class:`HTTPError`, if one occurred."""
+
+        http_error_msg = ''
+        if isinstance(self.reason, bytes):
+            # We attempt to decode utf-8 first because some servers
+            # choose to localize their reason strings. If the string
+            # isn't utf-8, we fall back to iso-8859-1 for all other
+            # encodings. (See PR #3538)
+            try:
+                reason = self.reason.decode('utf-8')
+            except UnicodeDecodeError:
+                reason = self.reason.decode('iso-8859-1')
+        else:
+            reason = self.reason
+
+        if 400 <= self.status_code < 500:
+            http_error_msg = u'%s Client Error: %s for url: %s' % (self.status_code, reason, self.url)
+
+        elif 500 <= self.status_code < 600:
+            http_error_msg = u'%s Server Error: %s for url: %s' % (self.status_code, reason, self.url)
+
+        if http_error_msg:
+            raise HTTPError(http_error_msg, response=self)
+
+    def close(self):
+        """Releases the connection back to the pool. Once this method has been
+        called the underlying ``raw`` object must not be accessed again.
+
+        *Note: Should not normally need to be called explicitly.*
+        """
+        if not self._content_consumed:
+            self.raw.close()
+
+        release_conn = getattr(self.raw, 'release_conn', None)
+        if release_conn is not None:
+            release_conn()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/packages.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/packages.py
new file mode 100644
index 0000000..9582fa7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/packages.py
@@ -0,0 +1,16 @@
+import sys
+
+# This code exists for backwards compatibility reasons.
+# I don't like it either. Just look the other way. :)
+
+for package in ('urllib3', 'idna', 'chardet'):
+    vendored_package = "pip._vendor." + package
+    locals()[package] = __import__(vendored_package)
+    # This traversal is apparently necessary such that the identities are
+    # preserved (requests.packages.urllib3.* is urllib3.*)
+    for mod in list(sys.modules):
+        if mod == vendored_package or mod.startswith(vendored_package + '.'):
+            unprefixed_mod = mod[len("pip._vendor."):]
+            sys.modules['pip._vendor.requests.packages.' + unprefixed_mod] = sys.modules[mod]
+
+# Kinda cool, though, right?
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/sessions.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/sessions.py
new file mode 100644
index 0000000..e8e2d60
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/sessions.py
@@ -0,0 +1,769 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.session
+~~~~~~~~~~~~~~~~
+
+This module provides a Session object to manage and persist settings across
+requests (cookies, auth, proxies).
+"""
+import os
+import sys
+import time
+from datetime import timedelta
+from collections import OrderedDict
+
+from .auth import _basic_auth_str
+from .compat import cookielib, is_py3, urljoin, urlparse, Mapping
+from .cookies import (
+    cookiejar_from_dict, extract_cookies_to_jar, RequestsCookieJar, merge_cookies)
+from .models import Request, PreparedRequest, DEFAULT_REDIRECT_LIMIT
+from .hooks import default_hooks, dispatch_hook
+from ._internal_utils import to_native_string
+from .utils import to_key_val_list, default_headers, DEFAULT_PORTS
+from .exceptions import (
+    TooManyRedirects, InvalidSchema, ChunkedEncodingError, ContentDecodingError)
+
+from .structures import CaseInsensitiveDict
+from .adapters import HTTPAdapter
+
+from .utils import (
+    requote_uri, get_environ_proxies, get_netrc_auth, should_bypass_proxies,
+    get_auth_from_url, rewind_body
+)
+
+from .status_codes import codes
+
+# formerly defined here, reexposed here for backward compatibility
+from .models import REDIRECT_STATI
+
+# Preferred clock, based on which one is more accurate on a given system.
+if sys.platform == 'win32':
+    try:  # Python 3.4+
+        preferred_clock = time.perf_counter
+    except AttributeError:  # Earlier than Python 3.
+        preferred_clock = time.clock
+else:
+    preferred_clock = time.time
+
+
+def merge_setting(request_setting, session_setting, dict_class=OrderedDict):
+    """Determines appropriate setting for a given request, taking into account
+    the explicit setting on that request, and the setting in the session. If a
+    setting is a dictionary, they will be merged together using `dict_class`
+    """
+
+    if session_setting is None:
+        return request_setting
+
+    if request_setting is None:
+        return session_setting
+
+    # Bypass if not a dictionary (e.g. verify)
+    if not (
+            isinstance(session_setting, Mapping) and
+            isinstance(request_setting, Mapping)
+    ):
+        return request_setting
+
+    merged_setting = dict_class(to_key_val_list(session_setting))
+    merged_setting.update(to_key_val_list(request_setting))
+
+    # Remove keys that are set to None. Extract keys first to avoid altering
+    # the dictionary during iteration.
+    none_keys = [k for (k, v) in merged_setting.items() if v is None]
+    for key in none_keys:
+        del merged_setting[key]
+
+    return merged_setting
+
+
+def merge_hooks(request_hooks, session_hooks, dict_class=OrderedDict):
+    """Properly merges both requests and session hooks.
+
+    This is necessary because when request_hooks == {'response': []}, the
+    merge breaks Session hooks entirely.
+    """
+    if session_hooks is None or session_hooks.get('response') == []:
+        return request_hooks
+
+    if request_hooks is None or request_hooks.get('response') == []:
+        return session_hooks
+
+    return merge_setting(request_hooks, session_hooks, dict_class)
+
+
+class SessionRedirectMixin(object):
+
+    def get_redirect_target(self, resp):
+        """Receives a Response. Returns a redirect URI or ``None``"""
+        # Due to the nature of how requests processes redirects this method will
+        # be called at least once upon the original response and at least twice
+        # on each subsequent redirect response (if any).
+        # If a custom mixin is used to handle this logic, it may be advantageous
+        # to cache the redirect location onto the response object as a private
+        # attribute.
+        if resp.is_redirect:
+            location = resp.headers['location']
+            # Currently the underlying http module on py3 decode headers
+            # in latin1, but empirical evidence suggests that latin1 is very
+            # rarely used with non-ASCII characters in HTTP headers.
+            # It is more likely to get UTF8 header rather than latin1.
+            # This causes incorrect handling of UTF8 encoded location headers.
+            # To solve this, we re-encode the location in latin1.
+            if is_py3:
+                location = location.encode('latin1')
+            return to_native_string(location, 'utf8')
+        return None
+
+    def should_strip_auth(self, old_url, new_url):
+        """Decide whether Authorization header should be removed when redirecting"""
+        old_parsed = urlparse(old_url)
+        new_parsed = urlparse(new_url)
+        if old_parsed.hostname != new_parsed.hostname:
+            return True
+        # Special case: allow http -> https redirect when using the standard
+        # ports. This isn't specified by RFC 7235, but is kept to avoid
+        # breaking backwards compatibility with older versions of requests
+        # that allowed any redirects on the same host.
+        if (old_parsed.scheme == 'http' and old_parsed.port in (80, None)
+                and new_parsed.scheme == 'https' and new_parsed.port in (443, None)):
+            return False
+
+        # Handle default port usage corresponding to scheme.
+        changed_port = old_parsed.port != new_parsed.port
+        changed_scheme = old_parsed.scheme != new_parsed.scheme
+        default_port = (DEFAULT_PORTS.get(old_parsed.scheme, None), None)
+        if (not changed_scheme and old_parsed.port in default_port
+                and new_parsed.port in default_port):
+            return False
+
+        # Standard case: root URI must match
+        return changed_port or changed_scheme
+
+    def resolve_redirects(self, resp, req, stream=False, timeout=None,
+                          verify=True, cert=None, proxies=None, yield_requests=False, **adapter_kwargs):
+        """Receives a Response. Returns a generator of Responses or Requests."""
+
+        hist = []  # keep track of history
+
+        url = self.get_redirect_target(resp)
+        previous_fragment = urlparse(req.url).fragment
+        while url:
+            prepared_request = req.copy()
+
+            # Update history and keep track of redirects.
+            # resp.history must ignore the original request in this loop
+            hist.append(resp)
+            resp.history = hist[1:]
+
+            try:
+                resp.content  # Consume socket so it can be released
+            except (ChunkedEncodingError, ContentDecodingError, RuntimeError):
+                resp.raw.read(decode_content=False)
+
+            if len(resp.history) >= self.max_redirects:
+                raise TooManyRedirects('Exceeded {} redirects.'.format(self.max_redirects), response=resp)
+
+            # Release the connection back into the pool.
+            resp.close()
+
+            # Handle redirection without scheme (see: RFC 1808 Section 4)
+            if url.startswith('//'):
+                parsed_rurl = urlparse(resp.url)
+                url = ':'.join([to_native_string(parsed_rurl.scheme), url])
+
+            # Normalize url case and attach previous fragment if needed (RFC 7231 7.1.2)
+            parsed = urlparse(url)
+            if parsed.fragment == '' and previous_fragment:
+                parsed = parsed._replace(fragment=previous_fragment)
+            elif parsed.fragment:
+                previous_fragment = parsed.fragment
+            url = parsed.geturl()
+
+            # Facilitate relative 'location' headers, as allowed by RFC 7231.
+            # (e.g. '/path/to/resource' instead of 'http://domain.tld/path/to/resource')
+            # Compliant with RFC3986, we percent encode the url.
+            if not parsed.netloc:
+                url = urljoin(resp.url, requote_uri(url))
+            else:
+                url = requote_uri(url)
+
+            prepared_request.url = to_native_string(url)
+
+            self.rebuild_method(prepared_request, resp)
+
+            # https://github.com/psf/requests/issues/1084
+            if resp.status_code not in (codes.temporary_redirect, codes.permanent_redirect):
+                # https://github.com/psf/requests/issues/3490
+                purged_headers = ('Content-Length', 'Content-Type', 'Transfer-Encoding')
+                for header in purged_headers:
+                    prepared_request.headers.pop(header, None)
+                prepared_request.body = None
+
+            headers = prepared_request.headers
+            headers.pop('Cookie', None)
+
+            # Extract any cookies sent on the response to the cookiejar
+            # in the new request. Because we've mutated our copied prepared
+            # request, use the old one that we haven't yet touched.
+            extract_cookies_to_jar(prepared_request._cookies, req, resp.raw)
+            merge_cookies(prepared_request._cookies, self.cookies)
+            prepared_request.prepare_cookies(prepared_request._cookies)
+
+            # Rebuild auth and proxy information.
+            proxies = self.rebuild_proxies(prepared_request, proxies)
+            self.rebuild_auth(prepared_request, resp)
+
+            # A failed tell() sets `_body_position` to `object()`. This non-None
+            # value ensures `rewindable` will be True, allowing us to raise an
+            # UnrewindableBodyError, instead of hanging the connection.
+            rewindable = (
+                prepared_request._body_position is not None and
+                ('Content-Length' in headers or 'Transfer-Encoding' in headers)
+            )
+
+            # Attempt to rewind consumed file-like object.
+            if rewindable:
+                rewind_body(prepared_request)
+
+            # Override the original request.
+            req = prepared_request
+
+            if yield_requests:
+                yield req
+            else:
+
+                resp = self.send(
+                    req,
+                    stream=stream,
+                    timeout=timeout,
+                    verify=verify,
+                    cert=cert,
+                    proxies=proxies,
+                    allow_redirects=False,
+                    **adapter_kwargs
+                )
+
+                extract_cookies_to_jar(self.cookies, prepared_request, resp.raw)
+
+                # extract redirect url, if any, for the next loop
+                url = self.get_redirect_target(resp)
+                yield resp
+
+    def rebuild_auth(self, prepared_request, response):
+        """When being redirected we may want to strip authentication from the
+        request to avoid leaking credentials. This method intelligently removes
+        and reapplies authentication where possible to avoid credential loss.
+        """
+        headers = prepared_request.headers
+        url = prepared_request.url
+
+        if 'Authorization' in headers and self.should_strip_auth(response.request.url, url):
+            # If we get redirected to a new host, we should strip out any
+            # authentication headers.
+            del headers['Authorization']
+
+        # .netrc might have more auth for us on our new host.
+        new_auth = get_netrc_auth(url) if self.trust_env else None
+        if new_auth is not None:
+            prepared_request.prepare_auth(new_auth)
+
+
+    def rebuild_proxies(self, prepared_request, proxies):
+        """This method re-evaluates the proxy configuration by considering the
+        environment variables. If we are redirected to a URL covered by
+        NO_PROXY, we strip the proxy configuration. Otherwise, we set missing
+        proxy keys for this URL (in case they were stripped by a previous
+        redirect).
+
+        This method also replaces the Proxy-Authorization header where
+        necessary.
+
+        :rtype: dict
+        """
+        proxies = proxies if proxies is not None else {}
+        headers = prepared_request.headers
+        url = prepared_request.url
+        scheme = urlparse(url).scheme
+        new_proxies = proxies.copy()
+        no_proxy = proxies.get('no_proxy')
+
+        bypass_proxy = should_bypass_proxies(url, no_proxy=no_proxy)
+        if self.trust_env and not bypass_proxy:
+            environ_proxies = get_environ_proxies(url, no_proxy=no_proxy)
+
+            proxy = environ_proxies.get(scheme, environ_proxies.get('all'))
+
+            if proxy:
+                new_proxies.setdefault(scheme, proxy)
+
+        if 'Proxy-Authorization' in headers:
+            del headers['Proxy-Authorization']
+
+        try:
+            username, password = get_auth_from_url(new_proxies[scheme])
+        except KeyError:
+            username, password = None, None
+
+        if username and password:
+            headers['Proxy-Authorization'] = _basic_auth_str(username, password)
+
+        return new_proxies
+
+    def rebuild_method(self, prepared_request, response):
+        """When being redirected we may want to change the method of the request
+        based on certain specs or browser behavior.
+        """
+        method = prepared_request.method
+
+        # https://tools.ietf.org/html/rfc7231#section-6.4.4
+        if response.status_code == codes.see_other and method != 'HEAD':
+            method = 'GET'
+
+        # Do what the browsers do, despite standards...
+        # First, turn 302s into GETs.
+        if response.status_code == codes.found and method != 'HEAD':
+            method = 'GET'
+
+        # Second, if a POST is responded to with a 301, turn it into a GET.
+        # This bizarre behaviour is explained in Issue 1704.
+        if response.status_code == codes.moved and method == 'POST':
+            method = 'GET'
+
+        prepared_request.method = method
+
+
+class Session(SessionRedirectMixin):
+    """A Requests session.
+
+    Provides cookie persistence, connection-pooling, and configuration.
+
+    Basic Usage::
+
+      >>> import requests
+      >>> s = requests.Session()
+      >>> s.get('https://httpbin.org/get')
+      <Response [200]>
+
+    Or as a context manager::
+
+      >>> with requests.Session() as s:
+      ...     s.get('https://httpbin.org/get')
+      <Response [200]>
+    """
+
+    __attrs__ = [
+        'headers', 'cookies', 'auth', 'proxies', 'hooks', 'params', 'verify',
+        'cert', 'adapters', 'stream', 'trust_env',
+        'max_redirects',
+    ]
+
+    def __init__(self):
+
+        #: A case-insensitive dictionary of headers to be sent on each
+        #: :class:`Request <Request>` sent from this
+        #: :class:`Session <Session>`.
+        self.headers = default_headers()
+
+        #: Default Authentication tuple or object to attach to
+        #: :class:`Request <Request>`.
+        self.auth = None
+
+        #: Dictionary mapping protocol or protocol and host to the URL of the proxy
+        #: (e.g. {'http': 'foo.bar:3128', 'http://host.name': 'foo.bar:4012'}) to
+        #: be used on each :class:`Request <Request>`.
+        self.proxies = {}
+
+        #: Event-handling hooks.
+        self.hooks = default_hooks()
+
+        #: Dictionary of querystring data to attach to each
+        #: :class:`Request <Request>`. The dictionary values may be lists for
+        #: representing multivalued query parameters.
+        self.params = {}
+
+        #: Stream response content default.
+        self.stream = False
+
+        #: SSL Verification default.
+        self.verify = True
+
+        #: SSL client certificate default, if String, path to ssl client
+        #: cert file (.pem). If Tuple, ('cert', 'key') pair.
+        self.cert = None
+
+        #: Maximum number of redirects allowed. If the request exceeds this
+        #: limit, a :class:`TooManyRedirects` exception is raised.
+        #: This defaults to requests.models.DEFAULT_REDIRECT_LIMIT, which is
+        #: 30.
+        self.max_redirects = DEFAULT_REDIRECT_LIMIT
+
+        #: Trust environment settings for proxy configuration, default
+        #: authentication and similar.
+        self.trust_env = True
+
+        #: A CookieJar containing all currently outstanding cookies set on this
+        #: session. By default it is a
+        #: :class:`RequestsCookieJar <requests.cookies.RequestsCookieJar>`, but
+        #: may be any other ``cookielib.CookieJar`` compatible object.
+        self.cookies = cookiejar_from_dict({})
+
+        # Default connection adapters.
+        self.adapters = OrderedDict()
+        self.mount('https://', HTTPAdapter())
+        self.mount('http://', HTTPAdapter())
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        self.close()
+
+    def prepare_request(self, request):
+        """Constructs a :class:`PreparedRequest <PreparedRequest>` for
+        transmission and returns it. The :class:`PreparedRequest` has settings
+        merged from the :class:`Request <Request>` instance and those of the
+        :class:`Session`.
+
+        :param request: :class:`Request` instance to prepare with this
+            session's settings.
+        :rtype: requests.PreparedRequest
+        """
+        cookies = request.cookies or {}
+
+        # Bootstrap CookieJar.
+        if not isinstance(cookies, cookielib.CookieJar):
+            cookies = cookiejar_from_dict(cookies)
+
+        # Merge with session cookies
+        merged_cookies = merge_cookies(
+            merge_cookies(RequestsCookieJar(), self.cookies), cookies)
+
+        # Set environment's basic authentication if not explicitly set.
+        auth = request.auth
+        if self.trust_env and not auth and not self.auth:
+            auth = get_netrc_auth(request.url)
+
+        p = PreparedRequest()
+        p.prepare(
+            method=request.method.upper(),
+            url=request.url,
+            files=request.files,
+            data=request.data,
+            json=request.json,
+            headers=merge_setting(request.headers, self.headers, dict_class=CaseInsensitiveDict),
+            params=merge_setting(request.params, self.params),
+            auth=merge_setting(auth, self.auth),
+            cookies=merged_cookies,
+            hooks=merge_hooks(request.hooks, self.hooks),
+        )
+        return p
+
+    def request(self, method, url,
+            params=None, data=None, headers=None, cookies=None, files=None,
+            auth=None, timeout=None, allow_redirects=True, proxies=None,
+            hooks=None, stream=None, verify=None, cert=None, json=None):
+        """Constructs a :class:`Request <Request>`, prepares it and sends it.
+        Returns :class:`Response <Response>` object.
+
+        :param method: method for the new :class:`Request` object.
+        :param url: URL for the new :class:`Request` object.
+        :param params: (optional) Dictionary or bytes to be sent in the query
+            string for the :class:`Request`.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param json: (optional) json to send in the body of the
+            :class:`Request`.
+        :param headers: (optional) Dictionary of HTTP Headers to send with the
+            :class:`Request`.
+        :param cookies: (optional) Dict or CookieJar object to send with the
+            :class:`Request`.
+        :param files: (optional) Dictionary of ``'filename': file-like-objects``
+            for multipart encoding upload.
+        :param auth: (optional) Auth tuple or callable to enable
+            Basic/Digest/Custom HTTP Auth.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple
+        :param allow_redirects: (optional) Set to True by default.
+        :type allow_redirects: bool
+        :param proxies: (optional) Dictionary mapping protocol or protocol and
+            hostname to the URL of the proxy.
+        :param stream: (optional) whether to immediately download the response
+            content. Defaults to ``False``.
+        :param verify: (optional) Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use. Defaults to ``True``.
+        :param cert: (optional) if String, path to ssl client cert file (.pem).
+            If Tuple, ('cert', 'key') pair.
+        :rtype: requests.Response
+        """
+        # Create the Request.
+        req = Request(
+            method=method.upper(),
+            url=url,
+            headers=headers,
+            files=files,
+            data=data or {},
+            json=json,
+            params=params or {},
+            auth=auth,
+            cookies=cookies,
+            hooks=hooks,
+        )
+        prep = self.prepare_request(req)
+
+        proxies = proxies or {}
+
+        settings = self.merge_environment_settings(
+            prep.url, proxies, stream, verify, cert
+        )
+
+        # Send the request.
+        send_kwargs = {
+            'timeout': timeout,
+            'allow_redirects': allow_redirects,
+        }
+        send_kwargs.update(settings)
+        resp = self.send(prep, **send_kwargs)
+
+        return resp
+
+    def get(self, url, **kwargs):
+        r"""Sends a GET request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        kwargs.setdefault('allow_redirects', True)
+        return self.request('GET', url, **kwargs)
+
+    def options(self, url, **kwargs):
+        r"""Sends a OPTIONS request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        kwargs.setdefault('allow_redirects', True)
+        return self.request('OPTIONS', url, **kwargs)
+
+    def head(self, url, **kwargs):
+        r"""Sends a HEAD request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        kwargs.setdefault('allow_redirects', False)
+        return self.request('HEAD', url, **kwargs)
+
+    def post(self, url, data=None, json=None, **kwargs):
+        r"""Sends a POST request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param json: (optional) json to send in the body of the :class:`Request`.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request('POST', url, data=data, json=json, **kwargs)
+
+    def put(self, url, data=None, **kwargs):
+        r"""Sends a PUT request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request('PUT', url, data=data, **kwargs)
+
+    def patch(self, url, data=None, **kwargs):
+        r"""Sends a PATCH request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request('PATCH', url, data=data, **kwargs)
+
+    def delete(self, url, **kwargs):
+        r"""Sends a DELETE request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request('DELETE', url, **kwargs)
+
+    def send(self, request, **kwargs):
+        """Send a given PreparedRequest.
+
+        :rtype: requests.Response
+        """
+        # Set defaults that the hooks can utilize to ensure they always have
+        # the correct parameters to reproduce the previous request.
+        kwargs.setdefault('stream', self.stream)
+        kwargs.setdefault('verify', self.verify)
+        kwargs.setdefault('cert', self.cert)
+        kwargs.setdefault('proxies', self.proxies)
+
+        # It's possible that users might accidentally send a Request object.
+        # Guard against that specific failure case.
+        if isinstance(request, Request):
+            raise ValueError('You can only send PreparedRequests.')
+
+        # Set up variables needed for resolve_redirects and dispatching of hooks
+        allow_redirects = kwargs.pop('allow_redirects', True)
+        stream = kwargs.get('stream')
+        hooks = request.hooks
+
+        # Get the appropriate adapter to use
+        adapter = self.get_adapter(url=request.url)
+
+        # Start time (approximately) of the request
+        start = preferred_clock()
+
+        # Send the request
+        r = adapter.send(request, **kwargs)
+
+        # Total elapsed time of the request (approximately)
+        elapsed = preferred_clock() - start
+        r.elapsed = timedelta(seconds=elapsed)
+
+        # Response manipulation hooks
+        r = dispatch_hook('response', hooks, r, **kwargs)
+
+        # Persist cookies
+        if r.history:
+
+            # If the hooks create history then we want those cookies too
+            for resp in r.history:
+                extract_cookies_to_jar(self.cookies, resp.request, resp.raw)
+
+        extract_cookies_to_jar(self.cookies, request, r.raw)
+
+        # Resolve redirects if allowed.
+        if allow_redirects:
+            # Redirect resolving generator.
+            gen = self.resolve_redirects(r, request, **kwargs)
+            history = [resp for resp in gen]
+        else:
+            history = []
+
+        # Shuffle things around if there's history.
+        if history:
+            # Insert the first (original) request at the start
+            history.insert(0, r)
+            # Get the last request made
+            r = history.pop()
+            r.history = history
+
+        # If redirects aren't being followed, store the response on the Request for Response.next().
+        if not allow_redirects:
+            try:
+                r._next = next(self.resolve_redirects(r, request, yield_requests=True, **kwargs))
+            except StopIteration:
+                pass
+
+        if not stream:
+            r.content
+
+        return r
+
+    def merge_environment_settings(self, url, proxies, stream, verify, cert):
+        """
+        Check the environment and merge it with some settings.
+
+        :rtype: dict
+        """
+        # Gather clues from the surrounding environment.
+        if self.trust_env:
+            # Set environment's proxies.
+            no_proxy = proxies.get('no_proxy') if proxies is not None else None
+            env_proxies = get_environ_proxies(url, no_proxy=no_proxy)
+            for (k, v) in env_proxies.items():
+                proxies.setdefault(k, v)
+
+            # Look for requests environment configuration and be compatible
+            # with cURL.
+            if verify is True or verify is None:
+                verify = (os.environ.get('REQUESTS_CA_BUNDLE') or
+                          os.environ.get('CURL_CA_BUNDLE'))
+
+        # Merge all the kwargs.
+        proxies = merge_setting(proxies, self.proxies)
+        stream = merge_setting(stream, self.stream)
+        verify = merge_setting(verify, self.verify)
+        cert = merge_setting(cert, self.cert)
+
+        return {'verify': verify, 'proxies': proxies, 'stream': stream,
+                'cert': cert}
+
+    def get_adapter(self, url):
+        """
+        Returns the appropriate connection adapter for the given URL.
+
+        :rtype: requests.adapters.BaseAdapter
+        """
+        for (prefix, adapter) in self.adapters.items():
+
+            if url.lower().startswith(prefix.lower()):
+                return adapter
+
+        # Nothing matches :-/
+        raise InvalidSchema("No connection adapters were found for {!r}".format(url))
+
+    def close(self):
+        """Closes all adapters and as such the session"""
+        for v in self.adapters.values():
+            v.close()
+
+    def mount(self, prefix, adapter):
+        """Registers a connection adapter to a prefix.
+
+        Adapters are sorted in descending order by prefix length.
+        """
+        self.adapters[prefix] = adapter
+        keys_to_move = [k for k in self.adapters if len(k) < len(prefix)]
+
+        for key in keys_to_move:
+            self.adapters[key] = self.adapters.pop(key)
+
+    def __getstate__(self):
+        state = {attr: getattr(self, attr, None) for attr in self.__attrs__}
+        return state
+
+    def __setstate__(self, state):
+        for attr, value in state.items():
+            setattr(self, attr, value)
+
+
+def session():
+    """
+    Returns a :class:`Session` for context-management.
+
+    .. deprecated:: 1.0.0
+
+        This method has been deprecated since version 1.0.0 and is only kept for
+        backwards compatibility. New code should use :class:`~requests.sessions.Session`
+        to create a session. This may be removed at a future date.
+
+    :rtype: Session
+    """
+    return Session()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/status_codes.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/status_codes.py
new file mode 100644
index 0000000..d80a7cd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/status_codes.py
@@ -0,0 +1,123 @@
+# -*- coding: utf-8 -*-
+
+r"""
+The ``codes`` object defines a mapping from common names for HTTP statuses
+to their numerical codes, accessible either as attributes or as dictionary
+items.
+
+Example::
+
+    >>> import requests
+    >>> requests.codes['temporary_redirect']
+    307
+    >>> requests.codes.teapot
+    418
+    >>> requests.codes['\o/']
+    200
+
+Some codes have multiple names, and both upper- and lower-case versions of
+the names are allowed. For example, ``codes.ok``, ``codes.OK``, and
+``codes.okay`` all correspond to the HTTP status code 200.
+"""
+
+from .structures import LookupDict
+
+_codes = {
+
+    # Informational.
+    100: ('continue',),
+    101: ('switching_protocols',),
+    102: ('processing',),
+    103: ('checkpoint',),
+    122: ('uri_too_long', 'request_uri_too_long'),
+    200: ('ok', 'okay', 'all_ok', 'all_okay', 'all_good', '\\o/', '✓'),
+    201: ('created',),
+    202: ('accepted',),
+    203: ('non_authoritative_info', 'non_authoritative_information'),
+    204: ('no_content',),
+    205: ('reset_content', 'reset'),
+    206: ('partial_content', 'partial'),
+    207: ('multi_status', 'multiple_status', 'multi_stati', 'multiple_stati'),
+    208: ('already_reported',),
+    226: ('im_used',),
+
+    # Redirection.
+    300: ('multiple_choices',),
+    301: ('moved_permanently', 'moved', '\\o-'),
+    302: ('found',),
+    303: ('see_other', 'other'),
+    304: ('not_modified',),
+    305: ('use_proxy',),
+    306: ('switch_proxy',),
+    307: ('temporary_redirect', 'temporary_moved', 'temporary'),
+    308: ('permanent_redirect',
+          'resume_incomplete', 'resume',),  # These 2 to be removed in 3.0
+
+    # Client Error.
+    400: ('bad_request', 'bad'),
+    401: ('unauthorized',),
+    402: ('payment_required', 'payment'),
+    403: ('forbidden',),
+    404: ('not_found', '-o-'),
+    405: ('method_not_allowed', 'not_allowed'),
+    406: ('not_acceptable',),
+    407: ('proxy_authentication_required', 'proxy_auth', 'proxy_authentication'),
+    408: ('request_timeout', 'timeout'),
+    409: ('conflict',),
+    410: ('gone',),
+    411: ('length_required',),
+    412: ('precondition_failed', 'precondition'),
+    413: ('request_entity_too_large',),
+    414: ('request_uri_too_large',),
+    415: ('unsupported_media_type', 'unsupported_media', 'media_type'),
+    416: ('requested_range_not_satisfiable', 'requested_range', 'range_not_satisfiable'),
+    417: ('expectation_failed',),
+    418: ('im_a_teapot', 'teapot', 'i_am_a_teapot'),
+    421: ('misdirected_request',),
+    422: ('unprocessable_entity', 'unprocessable'),
+    423: ('locked',),
+    424: ('failed_dependency', 'dependency'),
+    425: ('unordered_collection', 'unordered'),
+    426: ('upgrade_required', 'upgrade'),
+    428: ('precondition_required', 'precondition'),
+    429: ('too_many_requests', 'too_many'),
+    431: ('header_fields_too_large', 'fields_too_large'),
+    444: ('no_response', 'none'),
+    449: ('retry_with', 'retry'),
+    450: ('blocked_by_windows_parental_controls', 'parental_controls'),
+    451: ('unavailable_for_legal_reasons', 'legal_reasons'),
+    499: ('client_closed_request',),
+
+    # Server Error.
+    500: ('internal_server_error', 'server_error', '/o\\', '✗'),
+    501: ('not_implemented',),
+    502: ('bad_gateway',),
+    503: ('service_unavailable', 'unavailable'),
+    504: ('gateway_timeout',),
+    505: ('http_version_not_supported', 'http_version'),
+    506: ('variant_also_negotiates',),
+    507: ('insufficient_storage',),
+    509: ('bandwidth_limit_exceeded', 'bandwidth'),
+    510: ('not_extended',),
+    511: ('network_authentication_required', 'network_auth', 'network_authentication'),
+}
+
+codes = LookupDict(name='status_codes')
+
+def _init():
+    for code, titles in _codes.items():
+        for title in titles:
+            setattr(codes, title, code)
+            if not title.startswith(('\\', '/')):
+                setattr(codes, title.upper(), code)
+
+    def doc(code):
+        names = ', '.join('``%s``' % n for n in _codes[code])
+        return '* %d: %s' % (code, names)
+
+    global __doc__
+    __doc__ = (__doc__ + '\n' +
+               '\n'.join(doc(code) for code in sorted(_codes))
+               if __doc__ is not None else None)
+
+_init()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/structures.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/structures.py
new file mode 100644
index 0000000..8ee0ba7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/structures.py
@@ -0,0 +1,105 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.structures
+~~~~~~~~~~~~~~~~~~~
+
+Data structures that power Requests.
+"""
+
+from collections import OrderedDict
+
+from .compat import Mapping, MutableMapping
+
+
+class CaseInsensitiveDict(MutableMapping):
+    """A case-insensitive ``dict``-like object.
+
+    Implements all methods and operations of
+    ``MutableMapping`` as well as dict's ``copy``. Also
+    provides ``lower_items``.
+
+    All keys are expected to be strings. The structure remembers the
+    case of the last key to be set, and ``iter(instance)``,
+    ``keys()``, ``items()``, ``iterkeys()``, and ``iteritems()``
+    will contain case-sensitive keys. However, querying and contains
+    testing is case insensitive::
+
+        cid = CaseInsensitiveDict()
+        cid['Accept'] = 'application/json'
+        cid['aCCEPT'] == 'application/json'  # True
+        list(cid) == ['Accept']  # True
+
+    For example, ``headers['content-encoding']`` will return the
+    value of a ``'Content-Encoding'`` response header, regardless
+    of how the header name was originally stored.
+
+    If the constructor, ``.update``, or equality comparison
+    operations are given keys that have equal ``.lower()``s, the
+    behavior is undefined.
+    """
+
+    def __init__(self, data=None, **kwargs):
+        self._store = OrderedDict()
+        if data is None:
+            data = {}
+        self.update(data, **kwargs)
+
+    def __setitem__(self, key, value):
+        # Use the lowercased key for lookups, but store the actual
+        # key alongside the value.
+        self._store[key.lower()] = (key, value)
+
+    def __getitem__(self, key):
+        return self._store[key.lower()][1]
+
+    def __delitem__(self, key):
+        del self._store[key.lower()]
+
+    def __iter__(self):
+        return (casedkey for casedkey, mappedvalue in self._store.values())
+
+    def __len__(self):
+        return len(self._store)
+
+    def lower_items(self):
+        """Like iteritems(), but with all lowercase keys."""
+        return (
+            (lowerkey, keyval[1])
+            for (lowerkey, keyval)
+            in self._store.items()
+        )
+
+    def __eq__(self, other):
+        if isinstance(other, Mapping):
+            other = CaseInsensitiveDict(other)
+        else:
+            return NotImplemented
+        # Compare insensitively
+        return dict(self.lower_items()) == dict(other.lower_items())
+
+    # Copy is required
+    def copy(self):
+        return CaseInsensitiveDict(self._store.values())
+
+    def __repr__(self):
+        return str(dict(self.items()))
+
+
+class LookupDict(dict):
+    """Dictionary lookup object."""
+
+    def __init__(self, name=None):
+        self.name = name
+        super(LookupDict, self).__init__()
+
+    def __repr__(self):
+        return '<lookup \'%s\'>' % (self.name)
+
+    def __getitem__(self, key):
+        # We allow fall-through here, so values default to None
+
+        return self.__dict__.get(key, None)
+
+    def get(self, key, default=None):
+        return self.__dict__.get(key, default)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/utils.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/utils.py
new file mode 100644
index 0000000..c1700d7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/requests/utils.py
@@ -0,0 +1,982 @@
+# -*- coding: utf-8 -*-
+
+"""
+requests.utils
+~~~~~~~~~~~~~~
+
+This module provides utility functions that are used within Requests
+that are also useful for external consumption.
+"""
+
+import codecs
+import contextlib
+import io
+import os
+import re
+import socket
+import struct
+import sys
+import tempfile
+import warnings
+import zipfile
+from collections import OrderedDict
+
+from .__version__ import __version__
+from . import certs
+# to_native_string is unused here, but imported here for backwards compatibility
+from ._internal_utils import to_native_string
+from .compat import parse_http_list as _parse_list_header
+from .compat import (
+    quote, urlparse, bytes, str, unquote, getproxies,
+    proxy_bypass, urlunparse, basestring, integer_types, is_py3,
+    proxy_bypass_environment, getproxies_environment, Mapping)
+from .cookies import cookiejar_from_dict
+from .structures import CaseInsensitiveDict
+from .exceptions import (
+    InvalidURL, InvalidHeader, FileModeWarning, UnrewindableBodyError)
+
+NETRC_FILES = ('.netrc', '_netrc')
+
+DEFAULT_CA_BUNDLE_PATH = certs.where()
+
+DEFAULT_PORTS = {'http': 80, 'https': 443}
+
+
+if sys.platform == 'win32':
+    # provide a proxy_bypass version on Windows without DNS lookups
+
+    def proxy_bypass_registry(host):
+        try:
+            if is_py3:
+                import winreg
+            else:
+                import _winreg as winreg
+        except ImportError:
+            return False
+
+        try:
+            internetSettings = winreg.OpenKey(winreg.HKEY_CURRENT_USER,
+                r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
+            # ProxyEnable could be REG_SZ or REG_DWORD, normalizing it
+            proxyEnable = int(winreg.QueryValueEx(internetSettings,
+                                              'ProxyEnable')[0])
+            # ProxyOverride is almost always a string
+            proxyOverride = winreg.QueryValueEx(internetSettings,
+                                                'ProxyOverride')[0]
+        except OSError:
+            return False
+        if not proxyEnable or not proxyOverride:
+            return False
+
+        # make a check value list from the registry entry: replace the
+        # '<local>' string by the localhost entry and the corresponding
+        # canonical entry.
+        proxyOverride = proxyOverride.split(';')
+        # now check if we match one of the registry values.
+        for test in proxyOverride:
+            if test == '<local>':
+                if '.' not in host:
+                    return True
+            test = test.replace(".", r"\.")     # mask dots
+            test = test.replace("*", r".*")     # change glob sequence
+            test = test.replace("?", r".")      # change glob char
+            if re.match(test, host, re.I):
+                return True
+        return False
+
+    def proxy_bypass(host):  # noqa
+        """Return True, if the host should be bypassed.
+
+        Checks proxy settings gathered from the environment, if specified,
+        or the registry.
+        """
+        if getproxies_environment():
+            return proxy_bypass_environment(host)
+        else:
+            return proxy_bypass_registry(host)
+
+
+def dict_to_sequence(d):
+    """Returns an internal sequence dictionary update."""
+
+    if hasattr(d, 'items'):
+        d = d.items()
+
+    return d
+
+
+def super_len(o):
+    total_length = None
+    current_position = 0
+
+    if hasattr(o, '__len__'):
+        total_length = len(o)
+
+    elif hasattr(o, 'len'):
+        total_length = o.len
+
+    elif hasattr(o, 'fileno'):
+        try:
+            fileno = o.fileno()
+        except io.UnsupportedOperation:
+            pass
+        else:
+            total_length = os.fstat(fileno).st_size
+
+            # Having used fstat to determine the file length, we need to
+            # confirm that this file was opened up in binary mode.
+            if 'b' not in o.mode:
+                warnings.warn((
+                    "Requests has determined the content-length for this "
+                    "request using the binary size of the file: however, the "
+                    "file has been opened in text mode (i.e. without the 'b' "
+                    "flag in the mode). This may lead to an incorrect "
+                    "content-length. In Requests 3.0, support will be removed "
+                    "for files in text mode."),
+                    FileModeWarning
+                )
+
+    if hasattr(o, 'tell'):
+        try:
+            current_position = o.tell()
+        except (OSError, IOError):
+            # This can happen in some weird situations, such as when the file
+            # is actually a special file descriptor like stdin. In this
+            # instance, we don't know what the length is, so set it to zero and
+            # let requests chunk it instead.
+            if total_length is not None:
+                current_position = total_length
+        else:
+            if hasattr(o, 'seek') and total_length is None:
+                # StringIO and BytesIO have seek but no useable fileno
+                try:
+                    # seek to end of file
+                    o.seek(0, 2)
+                    total_length = o.tell()
+
+                    # seek back to current position to support
+                    # partially read file-like objects
+                    o.seek(current_position or 0)
+                except (OSError, IOError):
+                    total_length = 0
+
+    if total_length is None:
+        total_length = 0
+
+    return max(0, total_length - current_position)
+
+
+def get_netrc_auth(url, raise_errors=False):
+    """Returns the Requests tuple auth for a given url from netrc."""
+
+    try:
+        from netrc import netrc, NetrcParseError
+
+        netrc_path = None
+
+        for f in NETRC_FILES:
+            try:
+                loc = os.path.expanduser('~/{}'.format(f))
+            except KeyError:
+                # os.path.expanduser can fail when $HOME is undefined and
+                # getpwuid fails. See https://bugs.python.org/issue20164 &
+                # https://github.com/psf/requests/issues/1846
+                return
+
+            if os.path.exists(loc):
+                netrc_path = loc
+                break
+
+        # Abort early if there isn't one.
+        if netrc_path is None:
+            return
+
+        ri = urlparse(url)
+
+        # Strip port numbers from netloc. This weird `if...encode`` dance is
+        # used for Python 3.2, which doesn't support unicode literals.
+        splitstr = b':'
+        if isinstance(url, str):
+            splitstr = splitstr.decode('ascii')
+        host = ri.netloc.split(splitstr)[0]
+
+        try:
+            _netrc = netrc(netrc_path).authenticators(host)
+            if _netrc:
+                # Return with login / password
+                login_i = (0 if _netrc[0] else 1)
+                return (_netrc[login_i], _netrc[2])
+        except (NetrcParseError, IOError):
+            # If there was a parsing error or a permissions issue reading the file,
+            # we'll just skip netrc auth unless explicitly asked to raise errors.
+            if raise_errors:
+                raise
+
+    # AppEngine hackiness.
+    except (ImportError, AttributeError):
+        pass
+
+
+def guess_filename(obj):
+    """Tries to guess the filename of the given object."""
+    name = getattr(obj, 'name', None)
+    if (name and isinstance(name, basestring) and name[0] != '<' and
+            name[-1] != '>'):
+        return os.path.basename(name)
+
+
+def extract_zipped_paths(path):
+    """Replace nonexistent paths that look like they refer to a member of a zip
+    archive with the location of an extracted copy of the target, or else
+    just return the provided path unchanged.
+    """
+    if os.path.exists(path):
+        # this is already a valid path, no need to do anything further
+        return path
+
+    # find the first valid part of the provided path and treat that as a zip archive
+    # assume the rest of the path is the name of a member in the archive
+    archive, member = os.path.split(path)
+    while archive and not os.path.exists(archive):
+        archive, prefix = os.path.split(archive)
+        member = '/'.join([prefix, member])
+
+    if not zipfile.is_zipfile(archive):
+        return path
+
+    zip_file = zipfile.ZipFile(archive)
+    if member not in zip_file.namelist():
+        return path
+
+    # we have a valid zip archive and a valid member of that archive
+    tmp = tempfile.gettempdir()
+    extracted_path = os.path.join(tmp, *member.split('/'))
+    if not os.path.exists(extracted_path):
+        extracted_path = zip_file.extract(member, path=tmp)
+
+    return extracted_path
+
+
+def from_key_val_list(value):
+    """Take an object and test to see if it can be represented as a
+    dictionary. Unless it can not be represented as such, return an
+    OrderedDict, e.g.,
+
+    ::
+
+        >>> from_key_val_list([('key', 'val')])
+        OrderedDict([('key', 'val')])
+        >>> from_key_val_list('string')
+        Traceback (most recent call last):
+        ...
+        ValueError: cannot encode objects that are not 2-tuples
+        >>> from_key_val_list({'key': 'val'})
+        OrderedDict([('key', 'val')])
+
+    :rtype: OrderedDict
+    """
+    if value is None:
+        return None
+
+    if isinstance(value, (str, bytes, bool, int)):
+        raise ValueError('cannot encode objects that are not 2-tuples')
+
+    return OrderedDict(value)
+
+
+def to_key_val_list(value):
+    """Take an object and test to see if it can be represented as a
+    dictionary. If it can be, return a list of tuples, e.g.,
+
+    ::
+
+        >>> to_key_val_list([('key', 'val')])
+        [('key', 'val')]
+        >>> to_key_val_list({'key': 'val'})
+        [('key', 'val')]
+        >>> to_key_val_list('string')
+        Traceback (most recent call last):
+        ...
+        ValueError: cannot encode objects that are not 2-tuples
+
+    :rtype: list
+    """
+    if value is None:
+        return None
+
+    if isinstance(value, (str, bytes, bool, int)):
+        raise ValueError('cannot encode objects that are not 2-tuples')
+
+    if isinstance(value, Mapping):
+        value = value.items()
+
+    return list(value)
+
+
+# From mitsuhiko/werkzeug (used with permission).
+def parse_list_header(value):
+    """Parse lists as described by RFC 2068 Section 2.
+
+    In particular, parse comma-separated lists where the elements of
+    the list may include quoted-strings.  A quoted-string could
+    contain a comma.  A non-quoted string could have quotes in the
+    middle.  Quotes are removed automatically after parsing.
+
+    It basically works like :func:`parse_set_header` just that items
+    may appear multiple times and case sensitivity is preserved.
+
+    The return value is a standard :class:`list`:
+
+    >>> parse_list_header('token, "quoted value"')
+    ['token', 'quoted value']
+
+    To create a header from the :class:`list` again, use the
+    :func:`dump_header` function.
+
+    :param value: a string with a list header.
+    :return: :class:`list`
+    :rtype: list
+    """
+    result = []
+    for item in _parse_list_header(value):
+        if item[:1] == item[-1:] == '"':
+            item = unquote_header_value(item[1:-1])
+        result.append(item)
+    return result
+
+
+# From mitsuhiko/werkzeug (used with permission).
+def parse_dict_header(value):
+    """Parse lists of key, value pairs as described by RFC 2068 Section 2 and
+    convert them into a python dict:
+
+    >>> d = parse_dict_header('foo="is a fish", bar="as well"')
+    >>> type(d) is dict
+    True
+    >>> sorted(d.items())
+    [('bar', 'as well'), ('foo', 'is a fish')]
+
+    If there is no value for a key it will be `None`:
+
+    >>> parse_dict_header('key_without_value')
+    {'key_without_value': None}
+
+    To create a header from the :class:`dict` again, use the
+    :func:`dump_header` function.
+
+    :param value: a string with a dict header.
+    :return: :class:`dict`
+    :rtype: dict
+    """
+    result = {}
+    for item in _parse_list_header(value):
+        if '=' not in item:
+            result[item] = None
+            continue
+        name, value = item.split('=', 1)
+        if value[:1] == value[-1:] == '"':
+            value = unquote_header_value(value[1:-1])
+        result[name] = value
+    return result
+
+
+# From mitsuhiko/werkzeug (used with permission).
+def unquote_header_value(value, is_filename=False):
+    r"""Unquotes a header value.  (Reversal of :func:`quote_header_value`).
+    This does not use the real unquoting but what browsers are actually
+    using for quoting.
+
+    :param value: the header value to unquote.
+    :rtype: str
+    """
+    if value and value[0] == value[-1] == '"':
+        # this is not the real unquoting, but fixing this so that the
+        # RFC is met will result in bugs with internet explorer and
+        # probably some other browsers as well.  IE for example is
+        # uploading files with "C:\foo\bar.txt" as filename
+        value = value[1:-1]
+
+        # if this is a filename and the starting characters look like
+        # a UNC path, then just return the value without quotes.  Using the
+        # replace sequence below on a UNC path has the effect of turning
+        # the leading double slash into a single slash and then
+        # _fix_ie_filename() doesn't work correctly.  See #458.
+        if not is_filename or value[:2] != '\\\\':
+            return value.replace('\\\\', '\\').replace('\\"', '"')
+    return value
+
+
+def dict_from_cookiejar(cj):
+    """Returns a key/value dictionary from a CookieJar.
+
+    :param cj: CookieJar object to extract cookies from.
+    :rtype: dict
+    """
+
+    cookie_dict = {}
+
+    for cookie in cj:
+        cookie_dict[cookie.name] = cookie.value
+
+    return cookie_dict
+
+
+def add_dict_to_cookiejar(cj, cookie_dict):
+    """Returns a CookieJar from a key/value dictionary.
+
+    :param cj: CookieJar to insert cookies into.
+    :param cookie_dict: Dict of key/values to insert into CookieJar.
+    :rtype: CookieJar
+    """
+
+    return cookiejar_from_dict(cookie_dict, cj)
+
+
+def get_encodings_from_content(content):
+    """Returns encodings from given content string.
+
+    :param content: bytestring to extract encodings from.
+    """
+    warnings.warn((
+        'In requests 3.0, get_encodings_from_content will be removed. For '
+        'more information, please see the discussion on issue #2266. (This'
+        ' warning should only appear once.)'),
+        DeprecationWarning)
+
+    charset_re = re.compile(r'<meta.*?charset=["\']*(.+?)["\'>]', flags=re.I)
+    pragma_re = re.compile(r'<meta.*?content=["\']*;?charset=(.+?)["\'>]', flags=re.I)
+    xml_re = re.compile(r'^<\?xml.*?encoding=["\']*(.+?)["\'>]')
+
+    return (charset_re.findall(content) +
+            pragma_re.findall(content) +
+            xml_re.findall(content))
+
+
+def _parse_content_type_header(header):
+    """Returns content type and parameters from given header
+
+    :param header: string
+    :return: tuple containing content type and dictionary of
+         parameters
+    """
+
+    tokens = header.split(';')
+    content_type, params = tokens[0].strip(), tokens[1:]
+    params_dict = {}
+    items_to_strip = "\"' "
+
+    for param in params:
+        param = param.strip()
+        if param:
+            key, value = param, True
+            index_of_equals = param.find("=")
+            if index_of_equals != -1:
+                key = param[:index_of_equals].strip(items_to_strip)
+                value = param[index_of_equals + 1:].strip(items_to_strip)
+            params_dict[key.lower()] = value
+    return content_type, params_dict
+
+
+def get_encoding_from_headers(headers):
+    """Returns encodings from given HTTP Header Dict.
+
+    :param headers: dictionary to extract encoding from.
+    :rtype: str
+    """
+
+    content_type = headers.get('content-type')
+
+    if not content_type:
+        return None
+
+    content_type, params = _parse_content_type_header(content_type)
+
+    if 'charset' in params:
+        return params['charset'].strip("'\"")
+
+    if 'text' in content_type:
+        return 'ISO-8859-1'
+
+
+def stream_decode_response_unicode(iterator, r):
+    """Stream decodes a iterator."""
+
+    if r.encoding is None:
+        for item in iterator:
+            yield item
+        return
+
+    decoder = codecs.getincrementaldecoder(r.encoding)(errors='replace')
+    for chunk in iterator:
+        rv = decoder.decode(chunk)
+        if rv:
+            yield rv
+    rv = decoder.decode(b'', final=True)
+    if rv:
+        yield rv
+
+
+def iter_slices(string, slice_length):
+    """Iterate over slices of a string."""
+    pos = 0
+    if slice_length is None or slice_length <= 0:
+        slice_length = len(string)
+    while pos < len(string):
+        yield string[pos:pos + slice_length]
+        pos += slice_length
+
+
+def get_unicode_from_response(r):
+    """Returns the requested content back in unicode.
+
+    :param r: Response object to get unicode content from.
+
+    Tried:
+
+    1. charset from content-type
+    2. fall back and replace all unicode characters
+
+    :rtype: str
+    """
+    warnings.warn((
+        'In requests 3.0, get_unicode_from_response will be removed. For '
+        'more information, please see the discussion on issue #2266. (This'
+        ' warning should only appear once.)'),
+        DeprecationWarning)
+
+    tried_encodings = []
+
+    # Try charset from content-type
+    encoding = get_encoding_from_headers(r.headers)
+
+    if encoding:
+        try:
+            return str(r.content, encoding)
+        except UnicodeError:
+            tried_encodings.append(encoding)
+
+    # Fall back:
+    try:
+        return str(r.content, encoding, errors='replace')
+    except TypeError:
+        return r.content
+
+
+# The unreserved URI characters (RFC 3986)
+UNRESERVED_SET = frozenset(
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789-._~")
+
+
+def unquote_unreserved(uri):
+    """Un-escape any percent-escape sequences in a URI that are unreserved
+    characters. This leaves all reserved, illegal and non-ASCII bytes encoded.
+
+    :rtype: str
+    """
+    parts = uri.split('%')
+    for i in range(1, len(parts)):
+        h = parts[i][0:2]
+        if len(h) == 2 and h.isalnum():
+            try:
+                c = chr(int(h, 16))
+            except ValueError:
+                raise InvalidURL("Invalid percent-escape sequence: '%s'" % h)
+
+            if c in UNRESERVED_SET:
+                parts[i] = c + parts[i][2:]
+            else:
+                parts[i] = '%' + parts[i]
+        else:
+            parts[i] = '%' + parts[i]
+    return ''.join(parts)
+
+
+def requote_uri(uri):
+    """Re-quote the given URI.
+
+    This function passes the given URI through an unquote/quote cycle to
+    ensure that it is fully and consistently quoted.
+
+    :rtype: str
+    """
+    safe_with_percent = "!#$%&'()*+,/:;=?@[]~"
+    safe_without_percent = "!#$&'()*+,/:;=?@[]~"
+    try:
+        # Unquote only the unreserved characters
+        # Then quote only illegal characters (do not quote reserved,
+        # unreserved, or '%')
+        return quote(unquote_unreserved(uri), safe=safe_with_percent)
+    except InvalidURL:
+        # We couldn't unquote the given URI, so let's try quoting it, but
+        # there may be unquoted '%'s in the URI. We need to make sure they're
+        # properly quoted so they do not cause issues elsewhere.
+        return quote(uri, safe=safe_without_percent)
+
+
+def address_in_network(ip, net):
+    """This function allows you to check if an IP belongs to a network subnet
+
+    Example: returns True if ip = 192.168.1.1 and net = 192.168.1.0/24
+             returns False if ip = 192.168.1.1 and net = 192.168.100.0/24
+
+    :rtype: bool
+    """
+    ipaddr = struct.unpack('=L', socket.inet_aton(ip))[0]
+    netaddr, bits = net.split('/')
+    netmask = struct.unpack('=L', socket.inet_aton(dotted_netmask(int(bits))))[0]
+    network = struct.unpack('=L', socket.inet_aton(netaddr))[0] & netmask
+    return (ipaddr & netmask) == (network & netmask)
+
+
+def dotted_netmask(mask):
+    """Converts mask from /xx format to xxx.xxx.xxx.xxx
+
+    Example: if mask is 24 function returns 255.255.255.0
+
+    :rtype: str
+    """
+    bits = 0xffffffff ^ (1 << 32 - mask) - 1
+    return socket.inet_ntoa(struct.pack('>I', bits))
+
+
+def is_ipv4_address(string_ip):
+    """
+    :rtype: bool
+    """
+    try:
+        socket.inet_aton(string_ip)
+    except socket.error:
+        return False
+    return True
+
+
+def is_valid_cidr(string_network):
+    """
+    Very simple check of the cidr format in no_proxy variable.
+
+    :rtype: bool
+    """
+    if string_network.count('/') == 1:
+        try:
+            mask = int(string_network.split('/')[1])
+        except ValueError:
+            return False
+
+        if mask < 1 or mask > 32:
+            return False
+
+        try:
+            socket.inet_aton(string_network.split('/')[0])
+        except socket.error:
+            return False
+    else:
+        return False
+    return True
+
+
+@contextlib.contextmanager
+def set_environ(env_name, value):
+    """Set the environment variable 'env_name' to 'value'
+
+    Save previous value, yield, and then restore the previous value stored in
+    the environment variable 'env_name'.
+
+    If 'value' is None, do nothing"""
+    value_changed = value is not None
+    if value_changed:
+        old_value = os.environ.get(env_name)
+        os.environ[env_name] = value
+    try:
+        yield
+    finally:
+        if value_changed:
+            if old_value is None:
+                del os.environ[env_name]
+            else:
+                os.environ[env_name] = old_value
+
+
+def should_bypass_proxies(url, no_proxy):
+    """
+    Returns whether we should bypass proxies or not.
+
+    :rtype: bool
+    """
+    # Prioritize lowercase environment variables over uppercase
+    # to keep a consistent behaviour with other http projects (curl, wget).
+    get_proxy = lambda k: os.environ.get(k) or os.environ.get(k.upper())
+
+    # First check whether no_proxy is defined. If it is, check that the URL
+    # we're getting isn't in the no_proxy list.
+    no_proxy_arg = no_proxy
+    if no_proxy is None:
+        no_proxy = get_proxy('no_proxy')
+    parsed = urlparse(url)
+
+    if parsed.hostname is None:
+        # URLs don't always have hostnames, e.g. file:/// urls.
+        return True
+
+    if no_proxy:
+        # We need to check whether we match here. We need to see if we match
+        # the end of the hostname, both with and without the port.
+        no_proxy = (
+            host for host in no_proxy.replace(' ', '').split(',') if host
+        )
+
+        if is_ipv4_address(parsed.hostname):
+            for proxy_ip in no_proxy:
+                if is_valid_cidr(proxy_ip):
+                    if address_in_network(parsed.hostname, proxy_ip):
+                        return True
+                elif parsed.hostname == proxy_ip:
+                    # If no_proxy ip was defined in plain IP notation instead of cidr notation &
+                    # matches the IP of the index
+                    return True
+        else:
+            host_with_port = parsed.hostname
+            if parsed.port:
+                host_with_port += ':{}'.format(parsed.port)
+
+            for host in no_proxy:
+                if parsed.hostname.endswith(host) or host_with_port.endswith(host):
+                    # The URL does match something in no_proxy, so we don't want
+                    # to apply the proxies on this URL.
+                    return True
+
+    with set_environ('no_proxy', no_proxy_arg):
+        # parsed.hostname can be `None` in cases such as a file URI.
+        try:
+            bypass = proxy_bypass(parsed.hostname)
+        except (TypeError, socket.gaierror):
+            bypass = False
+
+    if bypass:
+        return True
+
+    return False
+
+
+def get_environ_proxies(url, no_proxy=None):
+    """
+    Return a dict of environment proxies.
+
+    :rtype: dict
+    """
+    if should_bypass_proxies(url, no_proxy=no_proxy):
+        return {}
+    else:
+        return getproxies()
+
+
+def select_proxy(url, proxies):
+    """Select a proxy for the url, if applicable.
+
+    :param url: The url being for the request
+    :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs
+    """
+    proxies = proxies or {}
+    urlparts = urlparse(url)
+    if urlparts.hostname is None:
+        return proxies.get(urlparts.scheme, proxies.get('all'))
+
+    proxy_keys = [
+        urlparts.scheme + '://' + urlparts.hostname,
+        urlparts.scheme,
+        'all://' + urlparts.hostname,
+        'all',
+    ]
+    proxy = None
+    for proxy_key in proxy_keys:
+        if proxy_key in proxies:
+            proxy = proxies[proxy_key]
+            break
+
+    return proxy
+
+
+def default_user_agent(name="python-requests"):
+    """
+    Return a string representing the default user agent.
+
+    :rtype: str
+    """
+    return '%s/%s' % (name, __version__)
+
+
+def default_headers():
+    """
+    :rtype: requests.structures.CaseInsensitiveDict
+    """
+    return CaseInsensitiveDict({
+        'User-Agent': default_user_agent(),
+        'Accept-Encoding': ', '.join(('gzip', 'deflate')),
+        'Accept': '*/*',
+        'Connection': 'keep-alive',
+    })
+
+
+def parse_header_links(value):
+    """Return a list of parsed link headers proxies.
+
+    i.e. Link: <http:/.../front.jpeg>; rel=front; type="image/jpeg",<http://.../back.jpeg>; rel=back;type="image/jpeg"
+
+    :rtype: list
+    """
+
+    links = []
+
+    replace_chars = ' \'"'
+
+    value = value.strip(replace_chars)
+    if not value:
+        return links
+
+    for val in re.split(', *<', value):
+        try:
+            url, params = val.split(';', 1)
+        except ValueError:
+            url, params = val, ''
+
+        link = {'url': url.strip('<> \'"')}
+
+        for param in params.split(';'):
+            try:
+                key, value = param.split('=')
+            except ValueError:
+                break
+
+            link[key.strip(replace_chars)] = value.strip(replace_chars)
+
+        links.append(link)
+
+    return links
+
+
+# Null bytes; no need to recreate these on each call to guess_json_utf
+_null = '\x00'.encode('ascii')  # encoding to ASCII for Python 3
+_null2 = _null * 2
+_null3 = _null * 3
+
+
+def guess_json_utf(data):
+    """
+    :rtype: str
+    """
+    # JSON always starts with two ASCII characters, so detection is as
+    # easy as counting the nulls and from their location and count
+    # determine the encoding. Also detect a BOM, if present.
+    sample = data[:4]
+    if sample in (codecs.BOM_UTF32_LE, codecs.BOM_UTF32_BE):
+        return 'utf-32'     # BOM included
+    if sample[:3] == codecs.BOM_UTF8:
+        return 'utf-8-sig'  # BOM included, MS style (discouraged)
+    if sample[:2] in (codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE):
+        return 'utf-16'     # BOM included
+    nullcount = sample.count(_null)
+    if nullcount == 0:
+        return 'utf-8'
+    if nullcount == 2:
+        if sample[::2] == _null2:   # 1st and 3rd are null
+            return 'utf-16-be'
+        if sample[1::2] == _null2:  # 2nd and 4th are null
+            return 'utf-16-le'
+        # Did not detect 2 valid UTF-16 ascii-range characters
+    if nullcount == 3:
+        if sample[:3] == _null3:
+            return 'utf-32-be'
+        if sample[1:] == _null3:
+            return 'utf-32-le'
+        # Did not detect a valid UTF-32 ascii-range character
+    return None
+
+
+def prepend_scheme_if_needed(url, new_scheme):
+    """Given a URL that may or may not have a scheme, prepend the given scheme.
+    Does not replace a present scheme with the one provided as an argument.
+
+    :rtype: str
+    """
+    scheme, netloc, path, params, query, fragment = urlparse(url, new_scheme)
+
+    # urlparse is a finicky beast, and sometimes decides that there isn't a
+    # netloc present. Assume that it's being over-cautious, and switch netloc
+    # and path if urlparse decided there was no netloc.
+    if not netloc:
+        netloc, path = path, netloc
+
+    return urlunparse((scheme, netloc, path, params, query, fragment))
+
+
+def get_auth_from_url(url):
+    """Given a url with authentication components, extract them into a tuple of
+    username,password.
+
+    :rtype: (str,str)
+    """
+    parsed = urlparse(url)
+
+    try:
+        auth = (unquote(parsed.username), unquote(parsed.password))
+    except (AttributeError, TypeError):
+        auth = ('', '')
+
+    return auth
+
+
+# Moved outside of function to avoid recompile every call
+_CLEAN_HEADER_REGEX_BYTE = re.compile(b'^\\S[^\\r\\n]*$|^$')
+_CLEAN_HEADER_REGEX_STR = re.compile(r'^\S[^\r\n]*$|^$')
+
+
+def check_header_validity(header):
+    """Verifies that header value is a string which doesn't contain
+    leading whitespace or return characters. This prevents unintended
+    header injection.
+
+    :param header: tuple, in the format (name, value).
+    """
+    name, value = header
+
+    if isinstance(value, bytes):
+        pat = _CLEAN_HEADER_REGEX_BYTE
+    else:
+        pat = _CLEAN_HEADER_REGEX_STR
+    try:
+        if not pat.match(value):
+            raise InvalidHeader("Invalid return character or leading space in header: %s" % name)
+    except TypeError:
+        raise InvalidHeader("Value for header {%s: %s} must be of type str or "
+                            "bytes, not %s" % (name, value, type(value)))
+
+
+def urldefragauth(url):
+    """
+    Given a url remove the fragment and the authentication part.
+
+    :rtype: str
+    """
+    scheme, netloc, path, params, query, fragment = urlparse(url)
+
+    # see func:`prepend_scheme_if_needed`
+    if not netloc:
+        netloc, path = path, netloc
+
+    netloc = netloc.rsplit('@', 1)[-1]
+
+    return urlunparse((scheme, netloc, path, params, query, ''))
+
+
+def rewind_body(prepared_request):
+    """Move file pointer back to its recorded starting position
+    so it can be read again on redirect.
+    """
+    body_seek = getattr(prepared_request.body, 'seek', None)
+    if body_seek is not None and isinstance(prepared_request._body_position, integer_types):
+        try:
+            body_seek(prepared_request._body_position)
+        except (IOError, OSError):
+            raise UnrewindableBodyError("An error occurred when rewinding request "
+                                        "body for redirect.")
+    else:
+        raise UnrewindableBodyError("Unable to rewind request body for redirect.")
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/__init__.py
new file mode 100644
index 0000000..3b44454
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/__init__.py
@@ -0,0 +1,26 @@
+__all__ = [
+    "__version__",
+    "AbstractProvider",
+    "AbstractResolver",
+    "BaseReporter",
+    "InconsistentCandidate",
+    "Resolver",
+    "RequirementsConflicted",
+    "ResolutionError",
+    "ResolutionImpossible",
+    "ResolutionTooDeep",
+]
+
+__version__ = "0.4.0"
+
+
+from .providers import AbstractProvider, AbstractResolver
+from .reporters import BaseReporter
+from .resolvers import (
+    InconsistentCandidate,
+    RequirementsConflicted,
+    Resolver,
+    ResolutionError,
+    ResolutionImpossible,
+    ResolutionTooDeep,
+)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/compat/collections_abc.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/compat/collections_abc.py
new file mode 100644
index 0000000..366cc5e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/compat/collections_abc.py
@@ -0,0 +1,6 @@
+__all__ = ["Sequence"]
+
+try:
+    from collections.abc import Sequence
+except ImportError:
+    from collections import Sequence
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/providers.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/providers.py
new file mode 100644
index 0000000..68b7290
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/providers.py
@@ -0,0 +1,109 @@
+class AbstractProvider(object):
+    """Delegate class to provide requirement interface for the resolver.
+    """
+
+    def identify(self, dependency):
+        """Given a dependency, return an identifier for it.
+
+        This is used in many places to identify the dependency, e.g. whether
+        two requirements should have their specifier parts merged, whether
+        two specifications would conflict with each other (because they the
+        same name but different versions).
+        """
+        raise NotImplementedError
+
+    def get_preference(self, resolution, candidates, information):
+        """Produce a sort key for given specification based on preference.
+
+        The preference is defined as "I think this requirement should be
+        resolved first". The lower the return value is, the more preferred
+        this group of arguments is.
+
+        :param resolution: Currently pinned candidate, or `None`.
+        :param candidates: A list of possible candidates.
+        :param information: A list of requirement information.
+
+        Each information instance is a named tuple with two entries:
+
+        * `requirement` specifies a requirement contributing to the current
+          candidate list
+        * `parent` specifies the candidate that provides (dependend on) the
+          requirement, or `None` to indicate a root requirement.
+
+        The preference could depend on a various of issues, including (not
+        necessarily in this order):
+
+        * Is this package pinned in the current resolution result?
+        * How relaxed is the requirement? Stricter ones should probably be
+          worked on first? (I don't know, actually.)
+        * How many possibilities are there to satisfy this requirement? Those
+          with few left should likely be worked on first, I guess?
+        * Are there any known conflicts for this requirement? We should
+          probably work on those with the most known conflicts.
+
+        A sortable value should be returned (this will be used as the `key`
+        parameter of the built-in sorting function). The smaller the value is,
+        the more preferred this specification is (i.e. the sorting function
+        is called with `reverse=False`).
+        """
+        raise NotImplementedError
+
+    def find_matches(self, requirements):
+        """Find all possible candidates that satisfy the given requirements.
+
+        This should try to get candidates based on the requirements' types.
+        For VCS, local, and archive requirements, the one-and-only match is
+        returned, and for a "named" requirement, the index(es) should be
+        consulted to find concrete candidates for this requirement.
+
+        :param requirements: A collection of requirements which all of the the
+            returned candidates must match. All requirements are guaranteed to
+            have the same identifier. The collection is never empty.
+        :returns: An iterable that orders candidates by preference, e.g. the
+            most preferred candidate should come first.
+        """
+        raise NotImplementedError
+
+    def is_satisfied_by(self, requirement, candidate):
+        """Whether the given requirement can be satisfied by a candidate.
+
+        The candidate is guarenteed to have been generated from the
+        requirement.
+
+        A boolean should be returned to indicate whether `candidate` is a
+        viable solution to the requirement.
+        """
+        raise NotImplementedError
+
+    def get_dependencies(self, candidate):
+        """Get dependencies of a candidate.
+
+        This should return a collection of requirements that `candidate`
+        specifies as its dependencies.
+        """
+        raise NotImplementedError
+
+
+class AbstractResolver(object):
+    """The thing that performs the actual resolution work.
+    """
+
+    base_exception = Exception
+
+    def __init__(self, provider, reporter):
+        self.provider = provider
+        self.reporter = reporter
+
+    def resolve(self, requirements, **kwargs):
+        """Take a collection of constraints, spit out the resolution result.
+
+        This returns a representation of the final resolution state, with one
+        guarenteed attribute ``mapping`` that contains resolved candidates as
+        values. The keys are their respective identifiers.
+
+        :param requirements: A collection of constraints.
+        :param kwargs: Additional keyword arguments that subclasses may accept.
+
+        :raises: ``self.base_exception`` or its subclass.
+        """
+        raise NotImplementedError
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/reporters.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/reporters.py
new file mode 100644
index 0000000..a0a2a45
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/reporters.py
@@ -0,0 +1,42 @@
+class BaseReporter(object):
+    """Delegate class to provider progress reporting for the resolver.
+    """
+
+    def starting(self):
+        """Called before the resolution actually starts.
+        """
+
+    def starting_round(self, index):
+        """Called before each round of resolution starts.
+
+        The index is zero-based.
+        """
+
+    def ending_round(self, index, state):
+        """Called before each round of resolution ends.
+
+        This is NOT called if the resolution ends at this round. Use `ending`
+        if you want to report finalization. The index is zero-based.
+        """
+
+    def ending(self, state):
+        """Called before the resolution ends successfully.
+        """
+
+    def adding_requirement(self, requirement, parent):
+        """Called when adding a new requirement into the resolve criteria.
+
+        :param requirement: The additional requirement to be applied to filter
+            the available candidaites.
+        :param parent: The candidate that requires ``requirement`` as a
+            dependency, or None if ``requirement`` is one of the root
+            requirements passed in from ``Resolver.resolve()``.
+        """
+
+    def backtracking(self, candidate):
+        """Called when rejecting a candidate during backtracking.
+        """
+
+    def pinning(self, candidate):
+        """Called when adding a candidate to the potential solution.
+        """
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/resolvers.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/resolvers.py
new file mode 100644
index 0000000..4497f97
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/resolvers.py
@@ -0,0 +1,428 @@
+import collections
+
+from .compat import collections_abc
+from .providers import AbstractResolver
+from .structs import DirectedGraph
+
+
+RequirementInformation = collections.namedtuple(
+    "RequirementInformation", ["requirement", "parent"]
+)
+
+
+class ResolverException(Exception):
+    """A base class for all exceptions raised by this module.
+
+    Exceptions derived by this class should all be handled in this module. Any
+    bubbling pass the resolver should be treated as a bug.
+    """
+
+
+class RequirementsConflicted(ResolverException):
+    def __init__(self, criterion):
+        super(RequirementsConflicted, self).__init__(criterion)
+        self.criterion = criterion
+
+    def __str__(self):
+        return "Requirements conflict: {}".format(
+            ", ".join(repr(r) for r in self.criterion.iter_requirement()),
+        )
+
+
+class InconsistentCandidate(ResolverException):
+    def __init__(self, candidate, criterion):
+        super(InconsistentCandidate, self).__init__(candidate, criterion)
+        self.candidate = candidate
+        self.criterion = criterion
+
+    def __str__(self):
+        return "Provided candidate {!r} does not satisfy {}".format(
+            self.candidate,
+            ", ".join(repr(r) for r in self.criterion.iter_requirement()),
+        )
+
+
+class Criterion(object):
+    """Representation of possible resolution results of a package.
+
+    This holds three attributes:
+
+    * `information` is a collection of `RequirementInformation` pairs.
+      Each pair is a requirement contributing to this criterion, and the
+      candidate that provides the requirement.
+    * `incompatibilities` is a collection of all known not-to-work candidates
+      to exclude from consideration.
+    * `candidates` is a collection containing all possible candidates deducted
+      from the union of contributing requirements and known incompatibilities.
+      It should never be empty, except when the criterion is an attribute of a
+      raised `RequirementsConflicted` (in which case it is always empty).
+
+    .. note::
+        This class is intended to be externally immutable. **Do not** mutate
+        any of its attribute containers.
+    """
+
+    def __init__(self, candidates, information, incompatibilities):
+        self.candidates = candidates
+        self.information = information
+        self.incompatibilities = incompatibilities
+
+    def __repr__(self):
+        requirements = ", ".join(
+            "({!r}, via={!r})".format(req, parent)
+            for req, parent in self.information
+        )
+        return "Criterion({})".format(requirements)
+
+    @classmethod
+    def from_requirement(cls, provider, requirement, parent):
+        """Build an instance from a requirement.
+        """
+        candidates = provider.find_matches([requirement])
+        if not isinstance(candidates, collections_abc.Sequence):
+            candidates = list(candidates)
+        criterion = cls(
+            candidates=candidates,
+            information=[RequirementInformation(requirement, parent)],
+            incompatibilities=[],
+        )
+        if not candidates:
+            raise RequirementsConflicted(criterion)
+        return criterion
+
+    def iter_requirement(self):
+        return (i.requirement for i in self.information)
+
+    def iter_parent(self):
+        return (i.parent for i in self.information)
+
+    def merged_with(self, provider, requirement, parent):
+        """Build a new instance from this and a new requirement.
+        """
+        infos = list(self.information)
+        infos.append(RequirementInformation(requirement, parent))
+        candidates = provider.find_matches([r for r, _ in infos])
+        if not isinstance(candidates, collections_abc.Sequence):
+            candidates = list(candidates)
+        criterion = type(self)(candidates, infos, list(self.incompatibilities))
+        if not candidates:
+            raise RequirementsConflicted(criterion)
+        return criterion
+
+    def excluded_of(self, candidate):
+        """Build a new instance from this, but excluding specified candidate.
+
+        Returns the new instance, or None if we still have no valid candidates.
+        """
+        incompats = list(self.incompatibilities)
+        incompats.append(candidate)
+        candidates = [c for c in self.candidates if c != candidate]
+        if not candidates:
+            return None
+        criterion = type(self)(candidates, list(self.information), incompats)
+        return criterion
+
+
+class ResolutionError(ResolverException):
+    pass
+
+
+class ResolutionImpossible(ResolutionError):
+    def __init__(self, causes):
+        super(ResolutionImpossible, self).__init__(causes)
+        # causes is a list of RequirementInformation objects
+        self.causes = causes
+
+
+class ResolutionTooDeep(ResolutionError):
+    def __init__(self, round_count):
+        super(ResolutionTooDeep, self).__init__(round_count)
+        self.round_count = round_count
+
+
+# Resolution state in a round.
+State = collections.namedtuple("State", "mapping criteria")
+
+
+class Resolution(object):
+    """Stateful resolution object.
+
+    This is designed as a one-off object that holds information to kick start
+    the resolution process, and holds the results afterwards.
+    """
+
+    def __init__(self, provider, reporter):
+        self._p = provider
+        self._r = reporter
+        self._states = []
+
+    @property
+    def state(self):
+        try:
+            return self._states[-1]
+        except IndexError:
+            raise AttributeError("state")
+
+    def _push_new_state(self):
+        """Push a new state into history.
+
+        This new state will be used to hold resolution results of the next
+        coming round.
+        """
+        try:
+            base = self._states[-1]
+        except IndexError:
+            state = State(mapping=collections.OrderedDict(), criteria={})
+        else:
+            state = State(
+                mapping=base.mapping.copy(), criteria=base.criteria.copy(),
+            )
+        self._states.append(state)
+
+    def _merge_into_criterion(self, requirement, parent):
+        self._r.adding_requirement(requirement, parent)
+        name = self._p.identify(requirement)
+        try:
+            crit = self.state.criteria[name]
+        except KeyError:
+            crit = Criterion.from_requirement(self._p, requirement, parent)
+        else:
+            crit = crit.merged_with(self._p, requirement, parent)
+        return name, crit
+
+    def _get_criterion_item_preference(self, item):
+        name, criterion = item
+        try:
+            pinned = self.state.mapping[name]
+        except KeyError:
+            pinned = None
+        return self._p.get_preference(
+            pinned, criterion.candidates, criterion.information,
+        )
+
+    def _is_current_pin_satisfying(self, name, criterion):
+        try:
+            current_pin = self.state.mapping[name]
+        except KeyError:
+            return False
+        return all(
+            self._p.is_satisfied_by(r, current_pin)
+            for r in criterion.iter_requirement()
+        )
+
+    def _get_criteria_to_update(self, candidate):
+        criteria = {}
+        for r in self._p.get_dependencies(candidate):
+            name, crit = self._merge_into_criterion(r, parent=candidate)
+            criteria[name] = crit
+        return criteria
+
+    def _attempt_to_pin_criterion(self, name, criterion):
+        causes = []
+        for candidate in criterion.candidates:
+            try:
+                criteria = self._get_criteria_to_update(candidate)
+            except RequirementsConflicted as e:
+                causes.append(e.criterion)
+                continue
+
+            # Check the newly-pinned candidate actually works. This should
+            # always pass under normal circumstances, but in the case of a
+            # faulty provider, we will raise an error to notify the implementer
+            # to fix find_matches() and/or is_satisfied_by().
+            satisfied = all(
+                self._p.is_satisfied_by(r, candidate)
+                for r in criterion.iter_requirement()
+            )
+            if not satisfied:
+                raise InconsistentCandidate(candidate, criterion)
+
+            # Put newly-pinned candidate at the end. This is essential because
+            # backtracking looks at this mapping to get the last pin.
+            self._r.pinning(candidate)
+            self.state.mapping.pop(name, None)
+            self.state.mapping[name] = candidate
+            self.state.criteria.update(criteria)
+
+            return []
+
+        # All candidates tried, nothing works. This criterion is a dead
+        # end, signal for backtracking.
+        return causes
+
+    def _backtrack(self):
+        # Drop the current state, it's known not to work.
+        del self._states[-1]
+
+        # We need at least 2 states here:
+        # (a) One to backtrack to.
+        # (b) One to restore state (a) to its state prior to candidate-pinning,
+        #     so we can pin another one instead.
+
+        while len(self._states) >= 2:
+            # Retract the last candidate pin.
+            prev_state = self._states.pop()
+            try:
+                name, candidate = prev_state.mapping.popitem()
+            except KeyError:
+                continue
+            self._r.backtracking(candidate)
+
+            # Create a new state to work on, with the newly known not-working
+            # candidate excluded.
+            self._push_new_state()
+
+            # Mark the retracted candidate as incompatible.
+            criterion = self.state.criteria[name].excluded_of(candidate)
+            if criterion is None:
+                # This state still does not work. Try the still previous state.
+                del self._states[-1]
+                continue
+            self.state.criteria[name] = criterion
+
+            return True
+
+        return False
+
+    def resolve(self, requirements, max_rounds):
+        if self._states:
+            raise RuntimeError("already resolved")
+
+        self._push_new_state()
+        for r in requirements:
+            try:
+                name, crit = self._merge_into_criterion(r, parent=None)
+            except RequirementsConflicted as e:
+                raise ResolutionImpossible(e.criterion.information)
+            self.state.criteria[name] = crit
+
+        self._r.starting()
+
+        for round_index in range(max_rounds):
+            self._r.starting_round(round_index)
+
+            self._push_new_state()
+            curr = self.state
+
+            unsatisfied_criterion_items = [
+                item
+                for item in self.state.criteria.items()
+                if not self._is_current_pin_satisfying(*item)
+            ]
+
+            # All criteria are accounted for. Nothing more to pin, we are done!
+            if not unsatisfied_criterion_items:
+                del self._states[-1]
+                self._r.ending(curr)
+                return self.state
+
+            # Choose the most preferred unpinned criterion to try.
+            name, criterion = min(
+                unsatisfied_criterion_items,
+                key=self._get_criterion_item_preference,
+            )
+            failure_causes = self._attempt_to_pin_criterion(name, criterion)
+
+            # Backtrack if pinning fails.
+            if failure_causes:
+                result = self._backtrack()
+                if not result:
+                    causes = [
+                        i for crit in failure_causes for i in crit.information
+                    ]
+                    raise ResolutionImpossible(causes)
+
+            self._r.ending_round(round_index, curr)
+
+        raise ResolutionTooDeep(max_rounds)
+
+
+def _has_route_to_root(criteria, key, all_keys, connected):
+    if key in connected:
+        return True
+    if key not in criteria:
+        return False
+    for p in criteria[key].iter_parent():
+        try:
+            pkey = all_keys[id(p)]
+        except KeyError:
+            continue
+        if pkey in connected:
+            connected.add(key)
+            return True
+        if _has_route_to_root(criteria, pkey, all_keys, connected):
+            connected.add(key)
+            return True
+    return False
+
+
+Result = collections.namedtuple("Result", "mapping graph criteria")
+
+
+def _build_result(state):
+    mapping = state.mapping
+    all_keys = {id(v): k for k, v in mapping.items()}
+    all_keys[id(None)] = None
+
+    graph = DirectedGraph()
+    graph.add(None)  # Sentinel as root dependencies' parent.
+
+    connected = {None}
+    for key, criterion in state.criteria.items():
+        if not _has_route_to_root(state.criteria, key, all_keys, connected):
+            continue
+        if key not in graph:
+            graph.add(key)
+        for p in criterion.iter_parent():
+            try:
+                pkey = all_keys[id(p)]
+            except KeyError:
+                continue
+            if pkey not in graph:
+                graph.add(pkey)
+            graph.connect(pkey, key)
+
+    return Result(
+        mapping={k: v for k, v in mapping.items() if k in connected},
+        graph=graph,
+        criteria=state.criteria,
+    )
+
+
+class Resolver(AbstractResolver):
+    """The thing that performs the actual resolution work.
+    """
+
+    base_exception = ResolverException
+
+    def resolve(self, requirements, max_rounds=100):
+        """Take a collection of constraints, spit out the resolution result.
+
+        The return value is a representation to the final resolution result. It
+        is a tuple subclass with three public members:
+
+        * `mapping`: A dict of resolved candidates. Each key is an identifier
+            of a requirement (as returned by the provider's `identify` method),
+            and the value is the resolved candidate.
+        * `graph`: A `DirectedGraph` instance representing the dependency tree.
+            The vertices are keys of `mapping`, and each edge represents *why*
+            a particular package is included. A special vertex `None` is
+            included to represent parents of user-supplied requirements.
+        * `criteria`: A dict of "criteria" that hold detailed information on
+            how edges in the graph are derived. Each key is an identifier of a
+            requirement, and the value is a `Criterion` instance.
+
+        The following exceptions may be raised if a resolution cannot be found:
+
+        * `ResolutionImpossible`: A resolution cannot be found for the given
+            combination of requirements. The `causes` attribute of the
+            exception is a list of (requirement, parent), giving the
+            requirements that could not be satisfied.
+        * `ResolutionTooDeep`: The dependency tree is too deeply nested and
+            the resolver gave up. This is usually caused by a circular
+            dependency, but you can try to resolve this by increasing the
+            `max_rounds` argument.
+        """
+        resolution = Resolution(self.provider, self.reporter)
+        state = resolution.resolve(requirements, max_rounds=max_rounds)
+        return _build_result(state)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/structs.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/structs.py
new file mode 100644
index 0000000..1eee08b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/resolvelib/structs.py
@@ -0,0 +1,68 @@
+class DirectedGraph(object):
+    """A graph structure with directed edges.
+    """
+
+    def __init__(self):
+        self._vertices = set()
+        self._forwards = {}  # <key> -> Set[<key>]
+        self._backwards = {}  # <key> -> Set[<key>]
+
+    def __iter__(self):
+        return iter(self._vertices)
+
+    def __len__(self):
+        return len(self._vertices)
+
+    def __contains__(self, key):
+        return key in self._vertices
+
+    def copy(self):
+        """Return a shallow copy of this graph.
+        """
+        other = DirectedGraph()
+        other._vertices = set(self._vertices)
+        other._forwards = {k: set(v) for k, v in self._forwards.items()}
+        other._backwards = {k: set(v) for k, v in self._backwards.items()}
+        return other
+
+    def add(self, key):
+        """Add a new vertex to the graph.
+        """
+        if key in self._vertices:
+            raise ValueError("vertex exists")
+        self._vertices.add(key)
+        self._forwards[key] = set()
+        self._backwards[key] = set()
+
+    def remove(self, key):
+        """Remove a vertex from the graph, disconnecting all edges from/to it.
+        """
+        self._vertices.remove(key)
+        for f in self._forwards.pop(key):
+            self._backwards[f].remove(key)
+        for t in self._backwards.pop(key):
+            self._forwards[t].remove(key)
+
+    def connected(self, f, t):
+        return f in self._backwards[t] and t in self._forwards[f]
+
+    def connect(self, f, t):
+        """Connect two existing vertices.
+
+        Nothing happens if the vertices are already connected.
+        """
+        if t not in self._vertices:
+            raise KeyError(t)
+        self._forwards[f].add(t)
+        self._backwards[t].add(f)
+
+    def iter_edges(self):
+        for f, children in self._forwards.items():
+            for t in children:
+                yield f, t
+
+    def iter_children(self, key):
+        return iter(self._forwards[key])
+
+    def iter_parents(self, key):
+        return iter(self._backwards[key])
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/retrying.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/retrying.py
new file mode 100644
index 0000000..6d1e627
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/retrying.py
@@ -0,0 +1,267 @@
+## Copyright 2013-2014 Ray Holder
+##
+## Licensed under the Apache License, Version 2.0 (the "License");
+## you may not use this file except in compliance with the License.
+## You may obtain a copy of the License at
+##
+## http://www.apache.org/licenses/LICENSE-2.0
+##
+## Unless required by applicable law or agreed to in writing, software
+## distributed under the License is distributed on an "AS IS" BASIS,
+## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+## See the License for the specific language governing permissions and
+## limitations under the License.
+
+import random
+from pip._vendor import six
+import sys
+import time
+import traceback
+
+
+# sys.maxint / 2, since Python 3.2 doesn't have a sys.maxint...
+MAX_WAIT = 1073741823
+
+
+def retry(*dargs, **dkw):
+    """
+    Decorator function that instantiates the Retrying object
+    @param *dargs: positional arguments passed to Retrying object
+    @param **dkw: keyword arguments passed to the Retrying object
+    """
+    # support both @retry and @retry() as valid syntax
+    if len(dargs) == 1 and callable(dargs[0]):
+        def wrap_simple(f):
+
+            @six.wraps(f)
+            def wrapped_f(*args, **kw):
+                return Retrying().call(f, *args, **kw)
+
+            return wrapped_f
+
+        return wrap_simple(dargs[0])
+
+    else:
+        def wrap(f):
+
+            @six.wraps(f)
+            def wrapped_f(*args, **kw):
+                return Retrying(*dargs, **dkw).call(f, *args, **kw)
+
+            return wrapped_f
+
+        return wrap
+
+
+class Retrying(object):
+
+    def __init__(self,
+                 stop=None, wait=None,
+                 stop_max_attempt_number=None,
+                 stop_max_delay=None,
+                 wait_fixed=None,
+                 wait_random_min=None, wait_random_max=None,
+                 wait_incrementing_start=None, wait_incrementing_increment=None,
+                 wait_exponential_multiplier=None, wait_exponential_max=None,
+                 retry_on_exception=None,
+                 retry_on_result=None,
+                 wrap_exception=False,
+                 stop_func=None,
+                 wait_func=None,
+                 wait_jitter_max=None):
+
+        self._stop_max_attempt_number = 5 if stop_max_attempt_number is None else stop_max_attempt_number
+        self._stop_max_delay = 100 if stop_max_delay is None else stop_max_delay
+        self._wait_fixed = 1000 if wait_fixed is None else wait_fixed
+        self._wait_random_min = 0 if wait_random_min is None else wait_random_min
+        self._wait_random_max = 1000 if wait_random_max is None else wait_random_max
+        self._wait_incrementing_start = 0 if wait_incrementing_start is None else wait_incrementing_start
+        self._wait_incrementing_increment = 100 if wait_incrementing_increment is None else wait_incrementing_increment
+        self._wait_exponential_multiplier = 1 if wait_exponential_multiplier is None else wait_exponential_multiplier
+        self._wait_exponential_max = MAX_WAIT if wait_exponential_max is None else wait_exponential_max
+        self._wait_jitter_max = 0 if wait_jitter_max is None else wait_jitter_max
+
+        # TODO add chaining of stop behaviors
+        # stop behavior
+        stop_funcs = []
+        if stop_max_attempt_number is not None:
+            stop_funcs.append(self.stop_after_attempt)
+
+        if stop_max_delay is not None:
+            stop_funcs.append(self.stop_after_delay)
+
+        if stop_func is not None:
+            self.stop = stop_func
+
+        elif stop is None:
+            self.stop = lambda attempts, delay: any(f(attempts, delay) for f in stop_funcs)
+
+        else:
+            self.stop = getattr(self, stop)
+
+        # TODO add chaining of wait behaviors
+        # wait behavior
+        wait_funcs = [lambda *args, **kwargs: 0]
+        if wait_fixed is not None:
+            wait_funcs.append(self.fixed_sleep)
+
+        if wait_random_min is not None or wait_random_max is not None:
+            wait_funcs.append(self.random_sleep)
+
+        if wait_incrementing_start is not None or wait_incrementing_increment is not None:
+            wait_funcs.append(self.incrementing_sleep)
+
+        if wait_exponential_multiplier is not None or wait_exponential_max is not None:
+            wait_funcs.append(self.exponential_sleep)
+
+        if wait_func is not None:
+            self.wait = wait_func
+
+        elif wait is None:
+            self.wait = lambda attempts, delay: max(f(attempts, delay) for f in wait_funcs)
+
+        else:
+            self.wait = getattr(self, wait)
+
+        # retry on exception filter
+        if retry_on_exception is None:
+            self._retry_on_exception = self.always_reject
+        else:
+            self._retry_on_exception = retry_on_exception
+
+        # TODO simplify retrying by Exception types
+        # retry on result filter
+        if retry_on_result is None:
+            self._retry_on_result = self.never_reject
+        else:
+            self._retry_on_result = retry_on_result
+
+        self._wrap_exception = wrap_exception
+
+    def stop_after_attempt(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Stop after the previous attempt >= stop_max_attempt_number."""
+        return previous_attempt_number >= self._stop_max_attempt_number
+
+    def stop_after_delay(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Stop after the time from the first attempt >= stop_max_delay."""
+        return delay_since_first_attempt_ms >= self._stop_max_delay
+
+    def no_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Don't sleep at all before retrying."""
+        return 0
+
+    def fixed_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Sleep a fixed amount of time between each retry."""
+        return self._wait_fixed
+
+    def random_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """Sleep a random amount of time between wait_random_min and wait_random_max"""
+        return random.randint(self._wait_random_min, self._wait_random_max)
+
+    def incrementing_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        """
+        Sleep an incremental amount of time after each attempt, starting at
+        wait_incrementing_start and incrementing by wait_incrementing_increment
+        """
+        result = self._wait_incrementing_start + (self._wait_incrementing_increment * (previous_attempt_number - 1))
+        if result < 0:
+            result = 0
+        return result
+
+    def exponential_sleep(self, previous_attempt_number, delay_since_first_attempt_ms):
+        exp = 2 ** previous_attempt_number
+        result = self._wait_exponential_multiplier * exp
+        if result > self._wait_exponential_max:
+            result = self._wait_exponential_max
+        if result < 0:
+            result = 0
+        return result
+
+    def never_reject(self, result):
+        return False
+
+    def always_reject(self, result):
+        return True
+
+    def should_reject(self, attempt):
+        reject = False
+        if attempt.has_exception:
+            reject |= self._retry_on_exception(attempt.value[1])
+        else:
+            reject |= self._retry_on_result(attempt.value)
+
+        return reject
+
+    def call(self, fn, *args, **kwargs):
+        start_time = int(round(time.time() * 1000))
+        attempt_number = 1
+        while True:
+            try:
+                attempt = Attempt(fn(*args, **kwargs), attempt_number, False)
+            except:
+                tb = sys.exc_info()
+                attempt = Attempt(tb, attempt_number, True)
+
+            if not self.should_reject(attempt):
+                return attempt.get(self._wrap_exception)
+
+            delay_since_first_attempt_ms = int(round(time.time() * 1000)) - start_time
+            if self.stop(attempt_number, delay_since_first_attempt_ms):
+                if not self._wrap_exception and attempt.has_exception:
+                    # get() on an attempt with an exception should cause it to be raised, but raise just in case
+                    raise attempt.get()
+                else:
+                    raise RetryError(attempt)
+            else:
+                sleep = self.wait(attempt_number, delay_since_first_attempt_ms)
+                if self._wait_jitter_max:
+                    jitter = random.random() * self._wait_jitter_max
+                    sleep = sleep + max(0, jitter)
+                time.sleep(sleep / 1000.0)
+
+            attempt_number += 1
+
+
+class Attempt(object):
+    """
+    An Attempt encapsulates a call to a target function that may end as a
+    normal return value from the function or an Exception depending on what
+    occurred during the execution.
+    """
+
+    def __init__(self, value, attempt_number, has_exception):
+        self.value = value
+        self.attempt_number = attempt_number
+        self.has_exception = has_exception
+
+    def get(self, wrap_exception=False):
+        """
+        Return the return value of this Attempt instance or raise an Exception.
+        If wrap_exception is true, this Attempt is wrapped inside of a
+        RetryError before being raised.
+        """
+        if self.has_exception:
+            if wrap_exception:
+                raise RetryError(self)
+            else:
+                six.reraise(self.value[0], self.value[1], self.value[2])
+        else:
+            return self.value
+
+    def __repr__(self):
+        if self.has_exception:
+            return "Attempts: {0}, Error:\n{1}".format(self.attempt_number, "".join(traceback.format_tb(self.value[2])))
+        else:
+            return "Attempts: {0}, Value: {1}".format(self.attempt_number, self.value)
+
+
+class RetryError(Exception):
+    """
+    A RetryError encapsulates the last Attempt instance right before giving up.
+    """
+
+    def __init__(self, last_attempt):
+        self.last_attempt = last_attempt
+
+    def __str__(self):
+        return "RetryError[{0}]".format(self.last_attempt)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/six.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/six.py
new file mode 100644
index 0000000..83f6978
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/six.py
@@ -0,0 +1,982 @@
+# Copyright (c) 2010-2020 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.15.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("getoutput", "commands", "subprocess"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("collections_abc", "collections", "collections.abc" if sys.version_info >= (3, 3) else "collections"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("dbm_ndbm", "dbm", "dbm.ndbm"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread" if sys.version_info < (3, 9) else "_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("email_mime_image", "email.MIMEImage", "email.mime.image"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_to_bytes", "urllib", "urllib.parse", "unquote", "unquote_to_bytes"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("splitvalue", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+    MovedAttribute("parse_http_list", "urllib2", "urllib.request"),
+    MovedAttribute("parse_keqv_list", "urllib2", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    del io
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+        _assertNotRegex = "assertNotRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+        _assertNotRegex = "assertNotRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+    _assertNotRegex = "assertNotRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+def assertNotRegex(self, *args, **kwargs):
+    return getattr(self, _assertNotRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        try:
+            if value is None:
+                value = tp()
+            if value.__traceback__ is not tb:
+                raise value.with_traceback(tb)
+            raise value
+        finally:
+            value = None
+            tb = None
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    try:
+        raise tp, value, tb
+    finally:
+        tb = None
+""")
+
+
+if sys.version_info[:2] > (3,):
+    exec_("""def raise_from(value, from_value):
+    try:
+        raise value from from_value
+    finally:
+        value = None
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    # This does exactly the same what the :func:`py3:functools.update_wrapper`
+    # function does on Python versions after 3.2. It sets the ``__wrapped__``
+    # attribute on ``wrapper`` object and it doesn't raise an error if any of
+    # the attributes mentioned in ``assigned`` and ``updated`` are missing on
+    # ``wrapped`` object.
+    def _update_wrapper(wrapper, wrapped,
+                        assigned=functools.WRAPPER_ASSIGNMENTS,
+                        updated=functools.WRAPPER_UPDATES):
+        for attr in assigned:
+            try:
+                value = getattr(wrapped, attr)
+            except AttributeError:
+                continue
+            else:
+                setattr(wrapper, attr, value)
+        for attr in updated:
+            getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
+        wrapper.__wrapped__ = wrapped
+        return wrapper
+    _update_wrapper.__doc__ = functools.update_wrapper.__doc__
+
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        return functools.partial(_update_wrapper, wrapped=wrapped,
+                                 assigned=assigned, updated=updated)
+    wraps.__doc__ = functools.wraps.__doc__
+
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(type):
+
+        def __new__(cls, name, this_bases, d):
+            if sys.version_info[:2] >= (3, 7):
+                # This version introduced PEP 560 that requires a bit
+                # of extra care (we mimic what is done by __build_class__).
+                resolved_bases = types.resolve_bases(bases)
+                if resolved_bases is not bases:
+                    d['__orig_bases__'] = bases
+            else:
+                resolved_bases = bases
+            return meta(name, resolved_bases, d)
+
+        @classmethod
+        def __prepare__(cls, name, this_bases):
+            return meta.__prepare__(name, bases)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        if hasattr(cls, '__qualname__'):
+            orig_vars['__qualname__'] = cls.__qualname__
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def ensure_binary(s, encoding='utf-8', errors='strict'):
+    """Coerce **s** to six.binary_type.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> encoded to `bytes`
+      - `bytes` -> `bytes`
+    """
+    if isinstance(s, binary_type):
+        return s
+    if isinstance(s, text_type):
+        return s.encode(encoding, errors)
+    raise TypeError("not expecting type '%s'" % type(s))
+
+
+def ensure_str(s, encoding='utf-8', errors='strict'):
+    """Coerce *s* to `str`.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    # Optimization: Fast return for the common case.
+    if type(s) is str:
+        return s
+    if PY2 and isinstance(s, text_type):
+        return s.encode(encoding, errors)
+    elif PY3 and isinstance(s, binary_type):
+        return s.decode(encoding, errors)
+    elif not isinstance(s, (text_type, binary_type)):
+        raise TypeError("not expecting type '%s'" % type(s))
+    return s
+
+
+def ensure_text(s, encoding='utf-8', errors='strict'):
+    """Coerce *s* to six.text_type.
+
+    For Python 2:
+      - `unicode` -> `unicode`
+      - `str` -> `unicode`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    if isinstance(s, binary_type):
+        return s.decode(encoding, errors)
+    elif isinstance(s, text_type):
+        return s
+    else:
+        raise TypeError("not expecting type '%s'" % type(s))
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A class decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/__init__.py
new file mode 100644
index 0000000..7a08fe7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/__init__.py
@@ -0,0 +1,25 @@
+"""Python module which parses and emits TOML.
+
+Released under the MIT license.
+"""
+
+from pip._vendor.toml import encoder
+from pip._vendor.toml import decoder
+
+__version__ = "0.10.1"
+_spec_ = "0.5.0"
+
+load = decoder.load
+loads = decoder.loads
+TomlDecoder = decoder.TomlDecoder
+TomlDecodeError = decoder.TomlDecodeError
+TomlPreserveCommentDecoder = decoder.TomlPreserveCommentDecoder
+
+dump = encoder.dump
+dumps = encoder.dumps
+TomlEncoder = encoder.TomlEncoder
+TomlArraySeparatorEncoder = encoder.TomlArraySeparatorEncoder
+TomlPreserveInlineDictEncoder = encoder.TomlPreserveInlineDictEncoder
+TomlNumpyEncoder = encoder.TomlNumpyEncoder
+TomlPreserveCommentEncoder = encoder.TomlPreserveCommentEncoder
+TomlPathlibEncoder = encoder.TomlPathlibEncoder
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/common.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/common.py
new file mode 100644
index 0000000..a5d673d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/common.py
@@ -0,0 +1,6 @@
+# content after the \
+escapes = ['0', 'b', 'f', 'n', 'r', 't', '"']
+# What it should be replaced by
+escapedchars = ['\0', '\b', '\f', '\n', '\r', '\t', '\"']
+# Used for substitution
+escape_to_escapedchars = dict(zip(_escapes, _escapedchars))
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/decoder.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/decoder.py
new file mode 100644
index 0000000..e488777
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/decoder.py
@@ -0,0 +1,1052 @@
+import datetime
+import io
+from os import linesep
+import re
+import sys
+
+from pip._vendor.toml.tz import TomlTz
+
+if sys.version_info < (3,):
+    _range = xrange  # noqa: F821
+else:
+    unicode = str
+    _range = range
+    basestring = str
+    unichr = chr
+
+
+def _detect_pathlib_path(p):
+    if (3, 4) <= sys.version_info:
+        import pathlib
+        if isinstance(p, pathlib.PurePath):
+            return True
+    return False
+
+
+def _ispath(p):
+    if isinstance(p, (bytes, basestring)):
+        return True
+    return _detect_pathlib_path(p)
+
+
+def _getpath(p):
+    if (3, 6) <= sys.version_info:
+        import os
+        return os.fspath(p)
+    if _detect_pathlib_path(p):
+        return str(p)
+    return p
+
+
+try:
+    FNFError = FileNotFoundError
+except NameError:
+    FNFError = IOError
+
+
+TIME_RE = re.compile(r"([0-9]{2}):([0-9]{2}):([0-9]{2})(\.([0-9]{3,6}))?")
+
+
+class TomlDecodeError(ValueError):
+    """Base toml Exception / Error."""
+
+    def __init__(self, msg, doc, pos):
+        lineno = doc.count('\n', 0, pos) + 1
+        colno = pos - doc.rfind('\n', 0, pos)
+        emsg = '{} (line {} column {} char {})'.format(msg, lineno, colno, pos)
+        ValueError.__init__(self, emsg)
+        self.msg = msg
+        self.doc = doc
+        self.pos = pos
+        self.lineno = lineno
+        self.colno = colno
+
+
+# Matches a TOML number, which allows underscores for readability
+_number_with_underscores = re.compile('([0-9])(_([0-9]))*')
+
+
+class CommentValue(object):
+    def __init__(self, val, comment, beginline, _dict):
+        self.val = val
+        separator = "\n" if beginline else " "
+        self.comment = separator + comment
+        self._dict = _dict
+
+    def __getitem__(self, key):
+        return self.val[key]
+
+    def __setitem__(self, key, value):
+        self.val[key] = value
+
+    def dump(self, dump_value_func):
+        retstr = dump_value_func(self.val)
+        if isinstance(self.val, self._dict):
+            return self.comment + "\n" + unicode(retstr)
+        else:
+            return unicode(retstr) + self.comment
+
+
+def _strictly_valid_num(n):
+    n = n.strip()
+    if not n:
+        return False
+    if n[0] == '_':
+        return False
+    if n[-1] == '_':
+        return False
+    if "_." in n or "._" in n:
+        return False
+    if len(n) == 1:
+        return True
+    if n[0] == '0' and n[1] not in ['.', 'o', 'b', 'x']:
+        return False
+    if n[0] == '+' or n[0] == '-':
+        n = n[1:]
+        if len(n) > 1 and n[0] == '0' and n[1] != '.':
+            return False
+    if '__' in n:
+        return False
+    return True
+
+
+def load(f, _dict=dict, decoder=None):
+    """Parses named file or files as toml and returns a dictionary
+
+    Args:
+        f: Path to the file to open, array of files to read into single dict
+           or a file descriptor
+        _dict: (optional) Specifies the class of the returned toml dictionary
+        decoder: The decoder to use
+
+    Returns:
+        Parsed toml file represented as a dictionary
+
+    Raises:
+        TypeError -- When f is invalid type
+        TomlDecodeError: Error while decoding toml
+        IOError / FileNotFoundError -- When an array with no valid (existing)
+        (Python 2 / Python 3)          file paths is passed
+    """
+
+    if _ispath(f):
+        with io.open(_getpath(f), encoding='utf-8') as ffile:
+            return loads(ffile.read(), _dict, decoder)
+    elif isinstance(f, list):
+        from os import path as op
+        from warnings import warn
+        if not [path for path in f if op.exists(path)]:
+            error_msg = "Load expects a list to contain filenames only."
+            error_msg += linesep
+            error_msg += ("The list needs to contain the path of at least one "
+                          "existing file.")
+            raise FNFError(error_msg)
+        if decoder is None:
+            decoder = TomlDecoder(_dict)
+        d = decoder.get_empty_table()
+        for l in f:  # noqa: E741
+            if op.exists(l):
+                d.update(load(l, _dict, decoder))
+            else:
+                warn("Non-existent filename in list with at least one valid "
+                     "filename")
+        return d
+    else:
+        try:
+            return loads(f.read(), _dict, decoder)
+        except AttributeError:
+            raise TypeError("You can only load a file descriptor, filename or "
+                            "list")
+
+
+_groupname_re = re.compile(r'^[A-Za-z0-9_-]+$')
+
+
+def loads(s, _dict=dict, decoder=None):
+    """Parses string as toml
+
+    Args:
+        s: String to be parsed
+        _dict: (optional) Specifies the class of the returned toml dictionary
+
+    Returns:
+        Parsed toml file represented as a dictionary
+
+    Raises:
+        TypeError: When a non-string is passed
+        TomlDecodeError: Error while decoding toml
+    """
+
+    implicitgroups = []
+    if decoder is None:
+        decoder = TomlDecoder(_dict)
+    retval = decoder.get_empty_table()
+    currentlevel = retval
+    if not isinstance(s, basestring):
+        raise TypeError("Expecting something like a string")
+
+    if not isinstance(s, unicode):
+        s = s.decode('utf8')
+
+    original = s
+    sl = list(s)
+    openarr = 0
+    openstring = False
+    openstrchar = ""
+    multilinestr = False
+    arrayoftables = False
+    beginline = True
+    keygroup = False
+    dottedkey = False
+    keyname = 0
+    key = ''
+    prev_key = ''
+    line_no = 1
+
+    for i, item in enumerate(sl):
+        if item == '\r' and sl[i + 1] == '\n':
+            sl[i] = ' '
+            continue
+        if keyname:
+            key += item
+            if item == '\n':
+                raise TomlDecodeError("Key name found without value."
+                                      " Reached end of line.", original, i)
+            if openstring:
+                if item == openstrchar:
+                    oddbackslash = False
+                    k = 1
+                    while i >= k and sl[i - k] == '\\':
+                        oddbackslash = not oddbackslash
+                        k += 1
+                    if not oddbackslash:
+                        keyname = 2
+                        openstring = False
+                        openstrchar = ""
+                continue
+            elif keyname == 1:
+                if item.isspace():
+                    keyname = 2
+                    continue
+                elif item == '.':
+                    dottedkey = True
+                    continue
+                elif item.isalnum() or item == '_' or item == '-':
+                    continue
+                elif (dottedkey and sl[i - 1] == '.' and
+                      (item == '"' or item == "'")):
+                    openstring = True
+                    openstrchar = item
+                    continue
+            elif keyname == 2:
+                if item.isspace():
+                    if dottedkey:
+                        nextitem = sl[i + 1]
+                        if not nextitem.isspace() and nextitem != '.':
+                            keyname = 1
+                    continue
+                if item == '.':
+                    dottedkey = True
+                    nextitem = sl[i + 1]
+                    if not nextitem.isspace() and nextitem != '.':
+                        keyname = 1
+                    continue
+            if item == '=':
+                keyname = 0
+                prev_key = key[:-1].rstrip()
+                key = ''
+                dottedkey = False
+            else:
+                raise TomlDecodeError("Found invalid character in key name: '" +
+                                      item + "'. Try quoting the key name.",
+                                      original, i)
+        if item == "'" and openstrchar != '"':
+            k = 1
+            try:
+                while sl[i - k] == "'":
+                    k += 1
+                    if k == 3:
+                        break
+            except IndexError:
+                pass
+            if k == 3:
+                multilinestr = not multilinestr
+                openstring = multilinestr
+            else:
+                openstring = not openstring
+            if openstring:
+                openstrchar = "'"
+            else:
+                openstrchar = ""
+        if item == '"' and openstrchar != "'":
+            oddbackslash = False
+            k = 1
+            tripquote = False
+            try:
+                while sl[i - k] == '"':
+                    k += 1
+                    if k == 3:
+                        tripquote = True
+                        break
+                if k == 1 or (k == 3 and tripquote):
+                    while sl[i - k] == '\\':
+                        oddbackslash = not oddbackslash
+                        k += 1
+            except IndexError:
+                pass
+            if not oddbackslash:
+                if tripquote:
+                    multilinestr = not multilinestr
+                    openstring = multilinestr
+                else:
+                    openstring = not openstring
+            if openstring:
+                openstrchar = '"'
+            else:
+                openstrchar = ""
+        if item == '#' and (not openstring and not keygroup and
+                            not arrayoftables):
+            j = i
+            comment = ""
+            try:
+                while sl[j] != '\n':
+                    comment += s[j]
+                    sl[j] = ' '
+                    j += 1
+            except IndexError:
+                break
+            if not openarr:
+                decoder.preserve_comment(line_no, prev_key, comment, beginline)
+        if item == '[' and (not openstring and not keygroup and
+                            not arrayoftables):
+            if beginline:
+                if len(sl) > i + 1 and sl[i + 1] == '[':
+                    arrayoftables = True
+                else:
+                    keygroup = True
+            else:
+                openarr += 1
+        if item == ']' and not openstring:
+            if keygroup:
+                keygroup = False
+            elif arrayoftables:
+                if sl[i - 1] == ']':
+                    arrayoftables = False
+            else:
+                openarr -= 1
+        if item == '\n':
+            if openstring or multilinestr:
+                if not multilinestr:
+                    raise TomlDecodeError("Unbalanced quotes", original, i)
+                if ((sl[i - 1] == "'" or sl[i - 1] == '"') and (
+                        sl[i - 2] == sl[i - 1])):
+                    sl[i] = sl[i - 1]
+                    if sl[i - 3] == sl[i - 1]:
+                        sl[i - 3] = ' '
+            elif openarr:
+                sl[i] = ' '
+            else:
+                beginline = True
+            line_no += 1
+        elif beginline and sl[i] != ' ' and sl[i] != '\t':
+            beginline = False
+            if not keygroup and not arrayoftables:
+                if sl[i] == '=':
+                    raise TomlDecodeError("Found empty keyname. ", original, i)
+                keyname = 1
+                key += item
+    if keyname:
+        raise TomlDecodeError("Key name found without value."
+                              " Reached end of file.", original, len(s))
+    if openstring:  # reached EOF and have an unterminated string
+        raise TomlDecodeError("Unterminated string found."
+                              " Reached end of file.", original, len(s))
+    s = ''.join(sl)
+    s = s.split('\n')
+    multikey = None
+    multilinestr = ""
+    multibackslash = False
+    pos = 0
+    for idx, line in enumerate(s):
+        if idx > 0:
+            pos += len(s[idx - 1]) + 1
+
+        decoder.embed_comments(idx, currentlevel)
+
+        if not multilinestr or multibackslash or '\n' not in multilinestr:
+            line = line.strip()
+        if line == "" and (not multikey or multibackslash):
+            continue
+        if multikey:
+            if multibackslash:
+                multilinestr += line
+            else:
+                multilinestr += line
+            multibackslash = False
+            closed = False
+            if multilinestr[0] == '[':
+                closed = line[-1] == ']'
+            elif len(line) > 2:
+                closed = (line[-1] == multilinestr[0] and
+                          line[-2] == multilinestr[0] and
+                          line[-3] == multilinestr[0])
+            if closed:
+                try:
+                    value, vtype = decoder.load_value(multilinestr)
+                except ValueError as err:
+                    raise TomlDecodeError(str(err), original, pos)
+                currentlevel[multikey] = value
+                multikey = None
+                multilinestr = ""
+            else:
+                k = len(multilinestr) - 1
+                while k > -1 and multilinestr[k] == '\\':
+                    multibackslash = not multibackslash
+                    k -= 1
+                if multibackslash:
+                    multilinestr = multilinestr[:-1]
+                else:
+                    multilinestr += "\n"
+            continue
+        if line[0] == '[':
+            arrayoftables = False
+            if len(line) == 1:
+                raise TomlDecodeError("Opening key group bracket on line by "
+                                      "itself.", original, pos)
+            if line[1] == '[':
+                arrayoftables = True
+                line = line[2:]
+                splitstr = ']]'
+            else:
+                line = line[1:]
+                splitstr = ']'
+            i = 1
+            quotesplits = decoder._get_split_on_quotes(line)
+            quoted = False
+            for quotesplit in quotesplits:
+                if not quoted and splitstr in quotesplit:
+                    break
+                i += quotesplit.count(splitstr)
+                quoted = not quoted
+            line = line.split(splitstr, i)
+            if len(line) < i + 1 or line[-1].strip() != "":
+                raise TomlDecodeError("Key group not on a line by itself.",
+                                      original, pos)
+            groups = splitstr.join(line[:-1]).split('.')
+            i = 0
+            while i < len(groups):
+                groups[i] = groups[i].strip()
+                if len(groups[i]) > 0 and (groups[i][0] == '"' or
+                                           groups[i][0] == "'"):
+                    groupstr = groups[i]
+                    j = i + 1
+                    while not groupstr[0] == groupstr[-1]:
+                        j += 1
+                        if j > len(groups) + 2:
+                            raise TomlDecodeError("Invalid group name '" +
+                                                  groupstr + "' Something " +
+                                                  "went wrong.", original, pos)
+                        groupstr = '.'.join(groups[i:j]).strip()
+                    groups[i] = groupstr[1:-1]
+                    groups[i + 1:j] = []
+                else:
+                    if not _groupname_re.match(groups[i]):
+                        raise TomlDecodeError("Invalid group name '" +
+                                              groups[i] + "'. Try quoting it.",
+                                              original, pos)
+                i += 1
+            currentlevel = retval
+            for i in _range(len(groups)):
+                group = groups[i]
+                if group == "":
+                    raise TomlDecodeError("Can't have a keygroup with an empty "
+                                          "name", original, pos)
+                try:
+                    currentlevel[group]
+                    if i == len(groups) - 1:
+                        if group in implicitgroups:
+                            implicitgroups.remove(group)
+                            if arrayoftables:
+                                raise TomlDecodeError("An implicitly defined "
+                                                      "table can't be an array",
+                                                      original, pos)
+                        elif arrayoftables:
+                            currentlevel[group].append(decoder.get_empty_table()
+                                                       )
+                        else:
+                            raise TomlDecodeError("What? " + group +
+                                                  " already exists?" +
+                                                  str(currentlevel),
+                                                  original, pos)
+                except TypeError:
+                    currentlevel = currentlevel[-1]
+                    if group not in currentlevel:
+                        currentlevel[group] = decoder.get_empty_table()
+                        if i == len(groups) - 1 and arrayoftables:
+                            currentlevel[group] = [decoder.get_empty_table()]
+                except KeyError:
+                    if i != len(groups) - 1:
+                        implicitgroups.append(group)
+                    currentlevel[group] = decoder.get_empty_table()
+                    if i == len(groups) - 1 and arrayoftables:
+                        currentlevel[group] = [decoder.get_empty_table()]
+                currentlevel = currentlevel[group]
+                if arrayoftables:
+                    try:
+                        currentlevel = currentlevel[-1]
+                    except KeyError:
+                        pass
+        elif line[0] == "{":
+            if line[-1] != "}":
+                raise TomlDecodeError("Line breaks are not allowed in inline"
+                                      "objects", original, pos)
+            try:
+                decoder.load_inline_object(line, currentlevel, multikey,
+                                           multibackslash)
+            except ValueError as err:
+                raise TomlDecodeError(str(err), original, pos)
+        elif "=" in line:
+            try:
+                ret = decoder.load_line(line, currentlevel, multikey,
+                                        multibackslash)
+            except ValueError as err:
+                raise TomlDecodeError(str(err), original, pos)
+            if ret is not None:
+                multikey, multilinestr, multibackslash = ret
+    return retval
+
+
+def _load_date(val):
+    microsecond = 0
+    tz = None
+    try:
+        if len(val) > 19:
+            if val[19] == '.':
+                if val[-1].upper() == 'Z':
+                    subsecondval = val[20:-1]
+                    tzval = "Z"
+                else:
+                    subsecondvalandtz = val[20:]
+                    if '+' in subsecondvalandtz:
+                        splitpoint = subsecondvalandtz.index('+')
+                        subsecondval = subsecondvalandtz[:splitpoint]
+                        tzval = subsecondvalandtz[splitpoint:]
+                    elif '-' in subsecondvalandtz:
+                        splitpoint = subsecondvalandtz.index('-')
+                        subsecondval = subsecondvalandtz[:splitpoint]
+                        tzval = subsecondvalandtz[splitpoint:]
+                    else:
+                        tzval = None
+                        subsecondval = subsecondvalandtz
+                if tzval is not None:
+                    tz = TomlTz(tzval)
+                microsecond = int(int(subsecondval) *
+                                  (10 ** (6 - len(subsecondval))))
+            else:
+                tz = TomlTz(val[19:])
+    except ValueError:
+        tz = None
+    if "-" not in val[1:]:
+        return None
+    try:
+        if len(val) == 10:
+            d = datetime.date(
+                int(val[:4]), int(val[5:7]),
+                int(val[8:10]))
+        else:
+            d = datetime.datetime(
+                int(val[:4]), int(val[5:7]),
+                int(val[8:10]), int(val[11:13]),
+                int(val[14:16]), int(val[17:19]), microsecond, tz)
+    except ValueError:
+        return None
+    return d
+
+
+def _load_unicode_escapes(v, hexbytes, prefix):
+    skip = False
+    i = len(v) - 1
+    while i > -1 and v[i] == '\\':
+        skip = not skip
+        i -= 1
+    for hx in hexbytes:
+        if skip:
+            skip = False
+            i = len(hx) - 1
+            while i > -1 and hx[i] == '\\':
+                skip = not skip
+                i -= 1
+            v += prefix
+            v += hx
+            continue
+        hxb = ""
+        i = 0
+        hxblen = 4
+        if prefix == "\\U":
+            hxblen = 8
+        hxb = ''.join(hx[i:i + hxblen]).lower()
+        if hxb.strip('0123456789abcdef'):
+            raise ValueError("Invalid escape sequence: " + hxb)
+        if hxb[0] == "d" and hxb[1].strip('01234567'):
+            raise ValueError("Invalid escape sequence: " + hxb +
+                             ". Only scalar unicode points are allowed.")
+        v += unichr(int(hxb, 16))
+        v += unicode(hx[len(hxb):])
+    return v
+
+
+# Unescape TOML string values.
+
+# content after the \
+_escapes = ['0', 'b', 'f', 'n', 'r', 't', '"']
+# What it should be replaced by
+_escapedchars = ['\0', '\b', '\f', '\n', '\r', '\t', '\"']
+# Used for substitution
+_escape_to_escapedchars = dict(zip(_escapes, _escapedchars))
+
+
+def _unescape(v):
+    """Unescape characters in a TOML string."""
+    i = 0
+    backslash = False
+    while i < len(v):
+        if backslash:
+            backslash = False
+            if v[i] in _escapes:
+                v = v[:i - 1] + _escape_to_escapedchars[v[i]] + v[i + 1:]
+            elif v[i] == '\\':
+                v = v[:i - 1] + v[i:]
+            elif v[i] == 'u' or v[i] == 'U':
+                i += 1
+            else:
+                raise ValueError("Reserved escape sequence used")
+            continue
+        elif v[i] == '\\':
+            backslash = True
+        i += 1
+    return v
+
+
+class InlineTableDict(object):
+    """Sentinel subclass of dict for inline tables."""
+
+
+class TomlDecoder(object):
+
+    def __init__(self, _dict=dict):
+        self._dict = _dict
+
+    def get_empty_table(self):
+        return self._dict()
+
+    def get_empty_inline_table(self):
+        class DynamicInlineTableDict(self._dict, InlineTableDict):
+            """Concrete sentinel subclass for inline tables.
+            It is a subclass of _dict which is passed in dynamically at load
+            time
+
+            It is also a subclass of InlineTableDict
+            """
+
+        return DynamicInlineTableDict()
+
+    def load_inline_object(self, line, currentlevel, multikey=False,
+                           multibackslash=False):
+        candidate_groups = line[1:-1].split(",")
+        groups = []
+        if len(candidate_groups) == 1 and not candidate_groups[0].strip():
+            candidate_groups.pop()
+        while len(candidate_groups) > 0:
+            candidate_group = candidate_groups.pop(0)
+            try:
+                _, value = candidate_group.split('=', 1)
+            except ValueError:
+                raise ValueError("Invalid inline table encountered")
+            value = value.strip()
+            if ((value[0] == value[-1] and value[0] in ('"', "'")) or (
+                    value[0] in '-0123456789' or
+                    value in ('true', 'false') or
+                    (value[0] == "[" and value[-1] == "]") or
+                    (value[0] == '{' and value[-1] == '}'))):
+                groups.append(candidate_group)
+            elif len(candidate_groups) > 0:
+                candidate_groups[0] = (candidate_group + "," +
+                                       candidate_groups[0])
+            else:
+                raise ValueError("Invalid inline table value encountered")
+        for group in groups:
+            status = self.load_line(group, currentlevel, multikey,
+                                    multibackslash)
+            if status is not None:
+                break
+
+    def _get_split_on_quotes(self, line):
+        doublequotesplits = line.split('"')
+        quoted = False
+        quotesplits = []
+        if len(doublequotesplits) > 1 and "'" in doublequotesplits[0]:
+            singlequotesplits = doublequotesplits[0].split("'")
+            doublequotesplits = doublequotesplits[1:]
+            while len(singlequotesplits) % 2 == 0 and len(doublequotesplits):
+                singlequotesplits[-1] += '"' + doublequotesplits[0]
+                doublequotesplits = doublequotesplits[1:]
+                if "'" in singlequotesplits[-1]:
+                    singlequotesplits = (singlequotesplits[:-1] +
+                                         singlequotesplits[-1].split("'"))
+            quotesplits += singlequotesplits
+        for doublequotesplit in doublequotesplits:
+            if quoted:
+                quotesplits.append(doublequotesplit)
+            else:
+                quotesplits += doublequotesplit.split("'")
+                quoted = not quoted
+        return quotesplits
+
+    def load_line(self, line, currentlevel, multikey, multibackslash):
+        i = 1
+        quotesplits = self._get_split_on_quotes(line)
+        quoted = False
+        for quotesplit in quotesplits:
+            if not quoted and '=' in quotesplit:
+                break
+            i += quotesplit.count('=')
+            quoted = not quoted
+        pair = line.split('=', i)
+        strictly_valid = _strictly_valid_num(pair[-1])
+        if _number_with_underscores.match(pair[-1]):
+            pair[-1] = pair[-1].replace('_', '')
+        while len(pair[-1]) and (pair[-1][0] != ' ' and pair[-1][0] != '\t' and
+                                 pair[-1][0] != "'" and pair[-1][0] != '"' and
+                                 pair[-1][0] != '[' and pair[-1][0] != '{' and
+                                 pair[-1].strip() != 'true' and
+                                 pair[-1].strip() != 'false'):
+            try:
+                float(pair[-1])
+                break
+            except ValueError:
+                pass
+            if _load_date(pair[-1]) is not None:
+                break
+            if TIME_RE.match(pair[-1]):
+                break
+            i += 1
+            prev_val = pair[-1]
+            pair = line.split('=', i)
+            if prev_val == pair[-1]:
+                raise ValueError("Invalid date or number")
+            if strictly_valid:
+                strictly_valid = _strictly_valid_num(pair[-1])
+        pair = ['='.join(pair[:-1]).strip(), pair[-1].strip()]
+        if '.' in pair[0]:
+            if '"' in pair[0] or "'" in pair[0]:
+                quotesplits = self._get_split_on_quotes(pair[0])
+                quoted = False
+                levels = []
+                for quotesplit in quotesplits:
+                    if quoted:
+                        levels.append(quotesplit)
+                    else:
+                        levels += [level.strip() for level in
+                                   quotesplit.split('.')]
+                    quoted = not quoted
+            else:
+                levels = pair[0].split('.')
+            while levels[-1] == "":
+                levels = levels[:-1]
+            for level in levels[:-1]:
+                if level == "":
+                    continue
+                if level not in currentlevel:
+                    currentlevel[level] = self.get_empty_table()
+                currentlevel = currentlevel[level]
+            pair[0] = levels[-1].strip()
+        elif (pair[0][0] == '"' or pair[0][0] == "'") and \
+                (pair[0][-1] == pair[0][0]):
+            pair[0] = _unescape(pair[0][1:-1])
+        k, koffset = self._load_line_multiline_str(pair[1])
+        if k > -1:
+            while k > -1 and pair[1][k + koffset] == '\\':
+                multibackslash = not multibackslash
+                k -= 1
+            if multibackslash:
+                multilinestr = pair[1][:-1]
+            else:
+                multilinestr = pair[1] + "\n"
+            multikey = pair[0]
+        else:
+            value, vtype = self.load_value(pair[1], strictly_valid)
+        try:
+            currentlevel[pair[0]]
+            raise ValueError("Duplicate keys!")
+        except TypeError:
+            raise ValueError("Duplicate keys!")
+        except KeyError:
+            if multikey:
+                return multikey, multilinestr, multibackslash
+            else:
+                currentlevel[pair[0]] = value
+
+    def _load_line_multiline_str(self, p):
+        poffset = 0
+        if len(p) < 3:
+            return -1, poffset
+        if p[0] == '[' and (p.strip()[-1] != ']' and
+                            self._load_array_isstrarray(p)):
+            newp = p[1:].strip().split(',')
+            while len(newp) > 1 and newp[-1][0] != '"' and newp[-1][0] != "'":
+                newp = newp[:-2] + [newp[-2] + ',' + newp[-1]]
+            newp = newp[-1]
+            poffset = len(p) - len(newp)
+            p = newp
+        if p[0] != '"' and p[0] != "'":
+            return -1, poffset
+        if p[1] != p[0] or p[2] != p[0]:
+            return -1, poffset
+        if len(p) > 5 and p[-1] == p[0] and p[-2] == p[0] and p[-3] == p[0]:
+            return -1, poffset
+        return len(p) - 1, poffset
+
+    def load_value(self, v, strictly_valid=True):
+        if not v:
+            raise ValueError("Empty value is invalid")
+        if v == 'true':
+            return (True, "bool")
+        elif v == 'false':
+            return (False, "bool")
+        elif v[0] == '"' or v[0] == "'":
+            quotechar = v[0]
+            testv = v[1:].split(quotechar)
+            triplequote = False
+            triplequotecount = 0
+            if len(testv) > 1 and testv[0] == '' and testv[1] == '':
+                testv = testv[2:]
+                triplequote = True
+            closed = False
+            for tv in testv:
+                if tv == '':
+                    if triplequote:
+                        triplequotecount += 1
+                    else:
+                        closed = True
+                else:
+                    oddbackslash = False
+                    try:
+                        i = -1
+                        j = tv[i]
+                        while j == '\\':
+                            oddbackslash = not oddbackslash
+                            i -= 1
+                            j = tv[i]
+                    except IndexError:
+                        pass
+                    if not oddbackslash:
+                        if closed:
+                            raise ValueError("Found tokens after a closed " +
+                                             "string. Invalid TOML.")
+                        else:
+                            if not triplequote or triplequotecount > 1:
+                                closed = True
+                            else:
+                                triplequotecount = 0
+            if quotechar == '"':
+                escapeseqs = v.split('\\')[1:]
+                backslash = False
+                for i in escapeseqs:
+                    if i == '':
+                        backslash = not backslash
+                    else:
+                        if i[0] not in _escapes and (i[0] != 'u' and
+                                                     i[0] != 'U' and
+                                                     not backslash):
+                            raise ValueError("Reserved escape sequence used")
+                        if backslash:
+                            backslash = False
+                for prefix in ["\\u", "\\U"]:
+                    if prefix in v:
+                        hexbytes = v.split(prefix)
+                        v = _load_unicode_escapes(hexbytes[0], hexbytes[1:],
+                                                  prefix)
+                v = _unescape(v)
+            if len(v) > 1 and v[1] == quotechar and (len(v) < 3 or
+                                                     v[1] == v[2]):
+                v = v[2:-2]
+            return (v[1:-1], "str")
+        elif v[0] == '[':
+            return (self.load_array(v), "array")
+        elif v[0] == '{':
+            inline_object = self.get_empty_inline_table()
+            self.load_inline_object(v, inline_object)
+            return (inline_object, "inline_object")
+        elif TIME_RE.match(v):
+            h, m, s, _, ms = TIME_RE.match(v).groups()
+            time = datetime.time(int(h), int(m), int(s), int(ms) if ms else 0)
+            return (time, "time")
+        else:
+            parsed_date = _load_date(v)
+            if parsed_date is not None:
+                return (parsed_date, "date")
+            if not strictly_valid:
+                raise ValueError("Weirdness with leading zeroes or "
+                                 "underscores in your number.")
+            itype = "int"
+            neg = False
+            if v[0] == '-':
+                neg = True
+                v = v[1:]
+            elif v[0] == '+':
+                v = v[1:]
+            v = v.replace('_', '')
+            lowerv = v.lower()
+            if '.' in v or ('x' not in v and ('e' in v or 'E' in v)):
+                if '.' in v and v.split('.', 1)[1] == '':
+                    raise ValueError("This float is missing digits after "
+                                     "the point")
+                if v[0] not in '0123456789':
+                    raise ValueError("This float doesn't have a leading "
+                                     "digit")
+                v = float(v)
+                itype = "float"
+            elif len(lowerv) == 3 and (lowerv == 'inf' or lowerv == 'nan'):
+                v = float(v)
+                itype = "float"
+            if itype == "int":
+                v = int(v, 0)
+            if neg:
+                return (0 - v, itype)
+            return (v, itype)
+
+    def bounded_string(self, s):
+        if len(s) == 0:
+            return True
+        if s[-1] != s[0]:
+            return False
+        i = -2
+        backslash = False
+        while len(s) + i > 0:
+            if s[i] == "\\":
+                backslash = not backslash
+                i -= 1
+            else:
+                break
+        return not backslash
+
+    def _load_array_isstrarray(self, a):
+        a = a[1:-1].strip()
+        if a != '' and (a[0] == '"' or a[0] == "'"):
+            return True
+        return False
+
+    def load_array(self, a):
+        atype = None
+        retval = []
+        a = a.strip()
+        if '[' not in a[1:-1] or "" != a[1:-1].split('[')[0].strip():
+            strarray = self._load_array_isstrarray(a)
+            if not a[1:-1].strip().startswith('{'):
+                a = a[1:-1].split(',')
+            else:
+                # a is an inline object, we must find the matching parenthesis
+                # to define groups
+                new_a = []
+                start_group_index = 1
+                end_group_index = 2
+                open_bracket_count = 1 if a[start_group_index] == '{' else 0
+                in_str = False
+                while end_group_index < len(a[1:]):
+                    if a[end_group_index] == '"' or a[end_group_index] == "'":
+                        if in_str:
+                            backslash_index = end_group_index - 1
+                            while (backslash_index > -1 and
+                                   a[backslash_index] == '\\'):
+                                in_str = not in_str
+                                backslash_index -= 1
+                        in_str = not in_str
+                    if not in_str and a[end_group_index] == '{':
+                        open_bracket_count += 1
+                    if in_str or a[end_group_index] != '}':
+                        end_group_index += 1
+                        continue
+                    elif a[end_group_index] == '}' and open_bracket_count > 1:
+                        open_bracket_count -= 1
+                        end_group_index += 1
+                        continue
+
+                    # Increase end_group_index by 1 to get the closing bracket
+                    end_group_index += 1
+
+                    new_a.append(a[start_group_index:end_group_index])
+
+                    # The next start index is at least after the closing
+                    # bracket, a closing bracket can be followed by a comma
+                    # since we are in an array.
+                    start_group_index = end_group_index + 1
+                    while (start_group_index < len(a[1:]) and
+                           a[start_group_index] != '{'):
+                        start_group_index += 1
+                    end_group_index = start_group_index + 1
+                a = new_a
+            b = 0
+            if strarray:
+                while b < len(a) - 1:
+                    ab = a[b].strip()
+                    while (not self.bounded_string(ab) or
+                           (len(ab) > 2 and
+                            ab[0] == ab[1] == ab[2] and
+                            ab[-2] != ab[0] and
+                            ab[-3] != ab[0])):
+                        a[b] = a[b] + ',' + a[b + 1]
+                        ab = a[b].strip()
+                        if b < len(a) - 2:
+                            a = a[:b + 1] + a[b + 2:]
+                        else:
+                            a = a[:b + 1]
+                    b += 1
+        else:
+            al = list(a[1:-1])
+            a = []
+            openarr = 0
+            j = 0
+            for i in _range(len(al)):
+                if al[i] == '[':
+                    openarr += 1
+                elif al[i] == ']':
+                    openarr -= 1
+                elif al[i] == ',' and not openarr:
+                    a.append(''.join(al[j:i]))
+                    j = i + 1
+            a.append(''.join(al[j:]))
+        for i in _range(len(a)):
+            a[i] = a[i].strip()
+            if a[i] != '':
+                nval, ntype = self.load_value(a[i])
+                if atype:
+                    if ntype != atype:
+                        raise ValueError("Not a homogeneous array")
+                else:
+                    atype = ntype
+                retval.append(nval)
+        return retval
+
+    def preserve_comment(self, line_no, key, comment, beginline):
+        pass
+
+    def embed_comments(self, idx, currentlevel):
+        pass
+
+
+class TomlPreserveCommentDecoder(TomlDecoder):
+
+    def __init__(self, _dict=dict):
+        self.saved_comments = {}
+        super(TomlPreserveCommentDecoder, self).__init__(_dict)
+
+    def preserve_comment(self, line_no, key, comment, beginline):
+        self.saved_comments[line_no] = (key, comment, beginline)
+
+    def embed_comments(self, idx, currentlevel):
+        if idx not in self.saved_comments:
+            return
+
+        key, comment, beginline = self.saved_comments[idx]
+        currentlevel[key] = CommentValue(currentlevel[key], comment, beginline,
+                                         self._dict)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/encoder.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/encoder.py
new file mode 100644
index 0000000..a8b03c7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/encoder.py
@@ -0,0 +1,304 @@
+import datetime
+import re
+import sys
+from decimal import Decimal
+
+from pip._vendor.toml.decoder import InlineTableDict
+
+if sys.version_info >= (3,):
+    unicode = str
+
+
+def dump(o, f, encoder=None):
+    """Writes out dict as toml to a file
+
+    Args:
+        o: Object to dump into toml
+        f: File descriptor where the toml should be stored
+        encoder: The ``TomlEncoder`` to use for constructing the output string
+
+    Returns:
+        String containing the toml corresponding to dictionary
+
+    Raises:
+        TypeError: When anything other than file descriptor is passed
+    """
+
+    if not f.write:
+        raise TypeError("You can only dump an object to a file descriptor")
+    d = dumps(o, encoder=encoder)
+    f.write(d)
+    return d
+
+
+def dumps(o, encoder=None):
+    """Stringifies input dict as toml
+
+    Args:
+        o: Object to dump into toml
+        encoder: The ``TomlEncoder`` to use for constructing the output string
+
+    Returns:
+        String containing the toml corresponding to dict
+
+    Examples:
+        ```python
+        >>> import toml
+        >>> output = {
+        ... 'a': "I'm a string",
+        ... 'b': ["I'm", "a", "list"],
+        ... 'c': 2400
+        ... }
+        >>> toml.dumps(output)
+        'a = "I\'m a string"\nb = [ "I\'m", "a", "list",]\nc = 2400\n'
+        ```
+    """
+
+    retval = ""
+    if encoder is None:
+        encoder = TomlEncoder(o.__class__)
+    addtoretval, sections = encoder.dump_sections(o, "")
+    retval += addtoretval
+    outer_objs = [id(o)]
+    while sections:
+        section_ids = [id(section) for section in sections]
+        for outer_obj in outer_objs:
+            if outer_obj in section_ids:
+                raise ValueError("Circular reference detected")
+        outer_objs += section_ids
+        newsections = encoder.get_empty_table()
+        for section in sections:
+            addtoretval, addtosections = encoder.dump_sections(
+                sections[section], section)
+
+            if addtoretval or (not addtoretval and not addtosections):
+                if retval and retval[-2:] != "\n\n":
+                    retval += "\n"
+                retval += "[" + section + "]\n"
+                if addtoretval:
+                    retval += addtoretval
+            for s in addtosections:
+                newsections[section + "." + s] = addtosections[s]
+        sections = newsections
+    return retval
+
+
+def _dump_str(v):
+    if sys.version_info < (3,) and hasattr(v, 'decode') and isinstance(v, str):
+        v = v.decode('utf-8')
+    v = "%r" % v
+    if v[0] == 'u':
+        v = v[1:]
+    singlequote = v.startswith("'")
+    if singlequote or v.startswith('"'):
+        v = v[1:-1]
+    if singlequote:
+        v = v.replace("\\'", "'")
+        v = v.replace('"', '\\"')
+    v = v.split("\\x")
+    while len(v) > 1:
+        i = -1
+        if not v[0]:
+            v = v[1:]
+        v[0] = v[0].replace("\\\\", "\\")
+        # No, I don't know why != works and == breaks
+        joinx = v[0][i] != "\\"
+        while v[0][:i] and v[0][i] == "\\":
+            joinx = not joinx
+            i -= 1
+        if joinx:
+            joiner = "x"
+        else:
+            joiner = "u00"
+        v = [v[0] + joiner + v[1]] + v[2:]
+    return unicode('"' + v[0] + '"')
+
+
+def _dump_float(v):
+    return "{}".format(v).replace("e+0", "e+").replace("e-0", "e-")
+
+
+def _dump_time(v):
+    utcoffset = v.utcoffset()
+    if utcoffset is None:
+        return v.isoformat()
+    # The TOML norm specifies that it's local time thus we drop the offset
+    return v.isoformat()[:-6]
+
+
+class TomlEncoder(object):
+
+    def __init__(self, _dict=dict, preserve=False):
+        self._dict = _dict
+        self.preserve = preserve
+        self.dump_funcs = {
+            str: _dump_str,
+            unicode: _dump_str,
+            list: self.dump_list,
+            bool: lambda v: unicode(v).lower(),
+            int: lambda v: v,
+            float: _dump_float,
+            Decimal: _dump_float,
+            datetime.datetime: lambda v: v.isoformat().replace('+00:00', 'Z'),
+            datetime.time: _dump_time,
+            datetime.date: lambda v: v.isoformat()
+        }
+
+    def get_empty_table(self):
+        return self._dict()
+
+    def dump_list(self, v):
+        retval = "["
+        for u in v:
+            retval += " " + unicode(self.dump_value(u)) + ","
+        retval += "]"
+        return retval
+
+    def dump_inline_table(self, section):
+        """Preserve inline table in its compact syntax instead of expanding
+        into subsection.
+
+        https://github.com/toml-lang/toml#user-content-inline-table
+        """
+        retval = ""
+        if isinstance(section, dict):
+            val_list = []
+            for k, v in section.items():
+                val = self.dump_inline_table(v)
+                val_list.append(k + " = " + val)
+            retval += "{ " + ", ".join(val_list) + " }\n"
+            return retval
+        else:
+            return unicode(self.dump_value(section))
+
+    def dump_value(self, v):
+        # Lookup function corresponding to v's type
+        dump_fn = self.dump_funcs.get(type(v))
+        if dump_fn is None and hasattr(v, '__iter__'):
+            dump_fn = self.dump_funcs[list]
+        # Evaluate function (if it exists) else return v
+        return dump_fn(v) if dump_fn is not None else self.dump_funcs[str](v)
+
+    def dump_sections(self, o, sup):
+        retstr = ""
+        if sup != "" and sup[-1] != ".":
+            sup += '.'
+        retdict = self._dict()
+        arraystr = ""
+        for section in o:
+            section = unicode(section)
+            qsection = section
+            if not re.match(r'^[A-Za-z0-9_-]+$', section):
+                qsection = _dump_str(section)
+            if not isinstance(o[section], dict):
+                arrayoftables = False
+                if isinstance(o[section], list):
+                    for a in o[section]:
+                        if isinstance(a, dict):
+                            arrayoftables = True
+                if arrayoftables:
+                    for a in o[section]:
+                        arraytabstr = "\n"
+                        arraystr += "[[" + sup + qsection + "]]\n"
+                        s, d = self.dump_sections(a, sup + qsection)
+                        if s:
+                            if s[0] == "[":
+                                arraytabstr += s
+                            else:
+                                arraystr += s
+                        while d:
+                            newd = self._dict()
+                            for dsec in d:
+                                s1, d1 = self.dump_sections(d[dsec], sup +
+                                                            qsection + "." +
+                                                            dsec)
+                                if s1:
+                                    arraytabstr += ("[" + sup + qsection +
+                                                    "." + dsec + "]\n")
+                                    arraytabstr += s1
+                                for s1 in d1:
+                                    newd[dsec + "." + s1] = d1[s1]
+                            d = newd
+                        arraystr += arraytabstr
+                else:
+                    if o[section] is not None:
+                        retstr += (qsection + " = " +
+                                   unicode(self.dump_value(o[section])) + '\n')
+            elif self.preserve and isinstance(o[section], InlineTableDict):
+                retstr += (qsection + " = " +
+                           self.dump_inline_table(o[section]))
+            else:
+                retdict[qsection] = o[section]
+        retstr += arraystr
+        return (retstr, retdict)
+
+
+class TomlPreserveInlineDictEncoder(TomlEncoder):
+
+    def __init__(self, _dict=dict):
+        super(TomlPreserveInlineDictEncoder, self).__init__(_dict, True)
+
+
+class TomlArraySeparatorEncoder(TomlEncoder):
+
+    def __init__(self, _dict=dict, preserve=False, separator=","):
+        super(TomlArraySeparatorEncoder, self).__init__(_dict, preserve)
+        if separator.strip() == "":
+            separator = "," + separator
+        elif separator.strip(' \t\n\r,'):
+            raise ValueError("Invalid separator for arrays")
+        self.separator = separator
+
+    def dump_list(self, v):
+        t = []
+        retval = "["
+        for u in v:
+            t.append(self.dump_value(u))
+        while t != []:
+            s = []
+            for u in t:
+                if isinstance(u, list):
+                    for r in u:
+                        s.append(r)
+                else:
+                    retval += " " + unicode(u) + self.separator
+            t = s
+        retval += "]"
+        return retval
+
+
+class TomlNumpyEncoder(TomlEncoder):
+
+    def __init__(self, _dict=dict, preserve=False):
+        import numpy as np
+        super(TomlNumpyEncoder, self).__init__(_dict, preserve)
+        self.dump_funcs[np.float16] = _dump_float
+        self.dump_funcs[np.float32] = _dump_float
+        self.dump_funcs[np.float64] = _dump_float
+        self.dump_funcs[np.int16] = self._dump_int
+        self.dump_funcs[np.int32] = self._dump_int
+        self.dump_funcs[np.int64] = self._dump_int
+
+    def _dump_int(self, v):
+        return "{}".format(int(v))
+
+
+class TomlPreserveCommentEncoder(TomlEncoder):
+
+    def __init__(self, _dict=dict, preserve=False):
+        from pip._vendor.toml.decoder import CommentValue
+        super(TomlPreserveCommentEncoder, self).__init__(_dict, preserve)
+        self.dump_funcs[CommentValue] = lambda v: v.dump(self.dump_value)
+
+
+class TomlPathlibEncoder(TomlEncoder):
+
+    def _dump_pathlib_path(self, v):
+        return _dump_str(str(v))
+
+    def dump_value(self, v):
+        if (3, 4) <= sys.version_info:
+            import pathlib
+            if isinstance(v, pathlib.PurePath):
+                v = str(v)
+        return super(TomlPathlibEncoder, self).dump_value(v)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/ordered.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/ordered.py
new file mode 100644
index 0000000..6052016
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/ordered.py
@@ -0,0 +1,15 @@
+from collections import OrderedDict
+from pip._vendor.toml import TomlEncoder
+from pip._vendor.toml import TomlDecoder
+
+
+class TomlOrderedDecoder(TomlDecoder):
+
+    def __init__(self):
+        super(self.__class__, self).__init__(_dict=OrderedDict)
+
+
+class TomlOrderedEncoder(TomlEncoder):
+
+    def __init__(self):
+        super(self.__class__, self).__init__(_dict=OrderedDict)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/tz.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/tz.py
new file mode 100644
index 0000000..93c3c8a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/toml/tz.py
@@ -0,0 +1,21 @@
+from datetime import tzinfo, timedelta
+
+
+class TomlTz(tzinfo):
+    def __init__(self, toml_offset):
+        if toml_offset == "Z":
+            self._raw_offset = "+00:00"
+        else:
+            self._raw_offset = toml_offset
+        self._sign = -1 if self._raw_offset[0] == '-' else 1
+        self._hours = int(self._raw_offset[1:3])
+        self._minutes = int(self._raw_offset[4:6])
+
+    def tzname(self, dt):
+        return "UTC" + self._raw_offset
+
+    def utcoffset(self, dt):
+        return self._sign * timedelta(hours=self._hours, minutes=self._minutes)
+
+    def dst(self, dt):
+        return timedelta(0)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/__init__.py
new file mode 100644
index 0000000..667e9bc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/__init__.py
@@ -0,0 +1,86 @@
+"""
+urllib3 - Thread-safe connection pooling and re-using.
+"""
+from __future__ import absolute_import
+import warnings
+
+from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool, connection_from_url
+
+from . import exceptions
+from .filepost import encode_multipart_formdata
+from .poolmanager import PoolManager, ProxyManager, proxy_from_url
+from .response import HTTPResponse
+from .util.request import make_headers
+from .util.url import get_host
+from .util.timeout import Timeout
+from .util.retry import Retry
+
+
+# Set default logging handler to avoid "No handler found" warnings.
+import logging
+from logging import NullHandler
+
+__author__ = "Andrey Petrov (andrey.petrov@shazow.net)"
+__license__ = "MIT"
+__version__ = "1.25.9"
+
+__all__ = (
+    "HTTPConnectionPool",
+    "HTTPSConnectionPool",
+    "PoolManager",
+    "ProxyManager",
+    "HTTPResponse",
+    "Retry",
+    "Timeout",
+    "add_stderr_logger",
+    "connection_from_url",
+    "disable_warnings",
+    "encode_multipart_formdata",
+    "get_host",
+    "make_headers",
+    "proxy_from_url",
+)
+
+logging.getLogger(__name__).addHandler(NullHandler())
+
+
+def add_stderr_logger(level=logging.DEBUG):
+    """
+    Helper for quickly adding a StreamHandler to the logger. Useful for
+    debugging.
+
+    Returns the handler after adding it.
+    """
+    # This method needs to be in this __init__.py to get the __name__ correct
+    # even if urllib3 is vendored within another package.
+    logger = logging.getLogger(__name__)
+    handler = logging.StreamHandler()
+    handler.setFormatter(logging.Formatter("%(asctime)s %(levelname)s %(message)s"))
+    logger.addHandler(handler)
+    logger.setLevel(level)
+    logger.debug("Added a stderr logging handler to logger: %s", __name__)
+    return handler
+
+
+# ... Clean up.
+del NullHandler
+
+
+# All warning filters *must* be appended unless you're really certain that they
+# shouldn't be: otherwise, it's very hard for users to use most Python
+# mechanisms to silence them.
+# SecurityWarning's always go off by default.
+warnings.simplefilter("always", exceptions.SecurityWarning, append=True)
+# SubjectAltNameWarning's should go off once per host
+warnings.simplefilter("default", exceptions.SubjectAltNameWarning, append=True)
+# InsecurePlatformWarning's don't vary between requests, so we keep it default.
+warnings.simplefilter("default", exceptions.InsecurePlatformWarning, append=True)
+# SNIMissingWarnings should go off only once.
+warnings.simplefilter("default", exceptions.SNIMissingWarning, append=True)
+
+
+def disable_warnings(category=exceptions.HTTPWarning):
+    """
+    Helper for quickly disabling all urllib3 warnings.
+    """
+    warnings.simplefilter("ignore", category)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/_collections.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/_collections.py
new file mode 100644
index 0000000..019d151
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/_collections.py
@@ -0,0 +1,336 @@
+from __future__ import absolute_import
+
+try:
+    from collections.abc import Mapping, MutableMapping
+except ImportError:
+    from collections import Mapping, MutableMapping
+try:
+    from threading import RLock
+except ImportError:  # Platform-specific: No threads available
+
+    class RLock:
+        def __enter__(self):
+            pass
+
+        def __exit__(self, exc_type, exc_value, traceback):
+            pass
+
+
+from collections import OrderedDict
+from .exceptions import InvalidHeader
+from .packages.six import iterkeys, itervalues, PY3
+
+
+__all__ = ["RecentlyUsedContainer", "HTTPHeaderDict"]
+
+
+_Null = object()
+
+
+class RecentlyUsedContainer(MutableMapping):
+    """
+    Provides a thread-safe dict-like container which maintains up to
+    ``maxsize`` keys while throwing away the least-recently-used keys beyond
+    ``maxsize``.
+
+    :param maxsize:
+        Maximum number of recent elements to retain.
+
+    :param dispose_func:
+        Every time an item is evicted from the container,
+        ``dispose_func(value)`` is called.  Callback which will get called
+    """
+
+    ContainerCls = OrderedDict
+
+    def __init__(self, maxsize=10, dispose_func=None):
+        self._maxsize = maxsize
+        self.dispose_func = dispose_func
+
+        self._container = self.ContainerCls()
+        self.lock = RLock()
+
+    def __getitem__(self, key):
+        # Re-insert the item, moving it to the end of the eviction line.
+        with self.lock:
+            item = self._container.pop(key)
+            self._container[key] = item
+            return item
+
+    def __setitem__(self, key, value):
+        evicted_value = _Null
+        with self.lock:
+            # Possibly evict the existing value of 'key'
+            evicted_value = self._container.get(key, _Null)
+            self._container[key] = value
+
+            # If we didn't evict an existing value, we might have to evict the
+            # least recently used item from the beginning of the container.
+            if len(self._container) > self._maxsize:
+                _key, evicted_value = self._container.popitem(last=False)
+
+        if self.dispose_func and evicted_value is not _Null:
+            self.dispose_func(evicted_value)
+
+    def __delitem__(self, key):
+        with self.lock:
+            value = self._container.pop(key)
+
+        if self.dispose_func:
+            self.dispose_func(value)
+
+    def __len__(self):
+        with self.lock:
+            return len(self._container)
+
+    def __iter__(self):
+        raise NotImplementedError(
+            "Iteration over this class is unlikely to be threadsafe."
+        )
+
+    def clear(self):
+        with self.lock:
+            # Copy pointers to all values, then wipe the mapping
+            values = list(itervalues(self._container))
+            self._container.clear()
+
+        if self.dispose_func:
+            for value in values:
+                self.dispose_func(value)
+
+    def keys(self):
+        with self.lock:
+            return list(iterkeys(self._container))
+
+
+class HTTPHeaderDict(MutableMapping):
+    """
+    :param headers:
+        An iterable of field-value pairs. Must not contain multiple field names
+        when compared case-insensitively.
+
+    :param kwargs:
+        Additional field-value pairs to pass in to ``dict.update``.
+
+    A ``dict`` like container for storing HTTP Headers.
+
+    Field names are stored and compared case-insensitively in compliance with
+    RFC 7230. Iteration provides the first case-sensitive key seen for each
+    case-insensitive pair.
+
+    Using ``__setitem__`` syntax overwrites fields that compare equal
+    case-insensitively in order to maintain ``dict``'s api. For fields that
+    compare equal, instead create a new ``HTTPHeaderDict`` and use ``.add``
+    in a loop.
+
+    If multiple fields that are equal case-insensitively are passed to the
+    constructor or ``.update``, the behavior is undefined and some will be
+    lost.
+
+    >>> headers = HTTPHeaderDict()
+    >>> headers.add('Set-Cookie', 'foo=bar')
+    >>> headers.add('set-cookie', 'baz=quxx')
+    >>> headers['content-length'] = '7'
+    >>> headers['SET-cookie']
+    'foo=bar, baz=quxx'
+    >>> headers['Content-Length']
+    '7'
+    """
+
+    def __init__(self, headers=None, **kwargs):
+        super(HTTPHeaderDict, self).__init__()
+        self._container = OrderedDict()
+        if headers is not None:
+            if isinstance(headers, HTTPHeaderDict):
+                self._copy_from(headers)
+            else:
+                self.extend(headers)
+        if kwargs:
+            self.extend(kwargs)
+
+    def __setitem__(self, key, val):
+        self._container[key.lower()] = [key, val]
+        return self._container[key.lower()]
+
+    def __getitem__(self, key):
+        val = self._container[key.lower()]
+        return ", ".join(val[1:])
+
+    def __delitem__(self, key):
+        del self._container[key.lower()]
+
+    def __contains__(self, key):
+        return key.lower() in self._container
+
+    def __eq__(self, other):
+        if not isinstance(other, Mapping) and not hasattr(other, "keys"):
+            return False
+        if not isinstance(other, type(self)):
+            other = type(self)(other)
+        return dict((k.lower(), v) for k, v in self.itermerged()) == dict(
+            (k.lower(), v) for k, v in other.itermerged()
+        )
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    if not PY3:  # Python 2
+        iterkeys = MutableMapping.iterkeys
+        itervalues = MutableMapping.itervalues
+
+    __marker = object()
+
+    def __len__(self):
+        return len(self._container)
+
+    def __iter__(self):
+        # Only provide the originally cased names
+        for vals in self._container.values():
+            yield vals[0]
+
+    def pop(self, key, default=__marker):
+        """D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
+          If key is not found, d is returned if given, otherwise KeyError is raised.
+        """
+        # Using the MutableMapping function directly fails due to the private marker.
+        # Using ordinary dict.pop would expose the internal structures.
+        # So let's reinvent the wheel.
+        try:
+            value = self[key]
+        except KeyError:
+            if default is self.__marker:
+                raise
+            return default
+        else:
+            del self[key]
+            return value
+
+    def discard(self, key):
+        try:
+            del self[key]
+        except KeyError:
+            pass
+
+    def add(self, key, val):
+        """Adds a (name, value) pair, doesn't overwrite the value if it already
+        exists.
+
+        >>> headers = HTTPHeaderDict(foo='bar')
+        >>> headers.add('Foo', 'baz')
+        >>> headers['foo']
+        'bar, baz'
+        """
+        key_lower = key.lower()
+        new_vals = [key, val]
+        # Keep the common case aka no item present as fast as possible
+        vals = self._container.setdefault(key_lower, new_vals)
+        if new_vals is not vals:
+            vals.append(val)
+
+    def extend(self, *args, **kwargs):
+        """Generic import function for any type of header-like object.
+        Adapted version of MutableMapping.update in order to insert items
+        with self.add instead of self.__setitem__
+        """
+        if len(args) > 1:
+            raise TypeError(
+                "extend() takes at most 1 positional "
+                "arguments ({0} given)".format(len(args))
+            )
+        other = args[0] if len(args) >= 1 else ()
+
+        if isinstance(other, HTTPHeaderDict):
+            for key, val in other.iteritems():
+                self.add(key, val)
+        elif isinstance(other, Mapping):
+            for key in other:
+                self.add(key, other[key])
+        elif hasattr(other, "keys"):
+            for key in other.keys():
+                self.add(key, other[key])
+        else:
+            for key, value in other:
+                self.add(key, value)
+
+        for key, value in kwargs.items():
+            self.add(key, value)
+
+    def getlist(self, key, default=__marker):
+        """Returns a list of all the values for the named field. Returns an
+        empty list if the key doesn't exist."""
+        try:
+            vals = self._container[key.lower()]
+        except KeyError:
+            if default is self.__marker:
+                return []
+            return default
+        else:
+            return vals[1:]
+
+    # Backwards compatibility for httplib
+    getheaders = getlist
+    getallmatchingheaders = getlist
+    iget = getlist
+
+    # Backwards compatibility for http.cookiejar
+    get_all = getlist
+
+    def __repr__(self):
+        return "%s(%s)" % (type(self).__name__, dict(self.itermerged()))
+
+    def _copy_from(self, other):
+        for key in other:
+            val = other.getlist(key)
+            if isinstance(val, list):
+                # Don't need to convert tuples
+                val = list(val)
+            self._container[key.lower()] = [key] + val
+
+    def copy(self):
+        clone = type(self)()
+        clone._copy_from(self)
+        return clone
+
+    def iteritems(self):
+        """Iterate over all header lines, including duplicate ones."""
+        for key in self:
+            vals = self._container[key.lower()]
+            for val in vals[1:]:
+                yield vals[0], val
+
+    def itermerged(self):
+        """Iterate over all headers, merging duplicate ones together."""
+        for key in self:
+            val = self._container[key.lower()]
+            yield val[0], ", ".join(val[1:])
+
+    def items(self):
+        return list(self.iteritems())
+
+    @classmethod
+    def from_httplib(cls, message):  # Python 2
+        """Read headers from a Python 2 httplib message object."""
+        # python2.7 does not expose a proper API for exporting multiheaders
+        # efficiently. This function re-reads raw lines from the message
+        # object and extracts the multiheaders properly.
+        obs_fold_continued_leaders = (" ", "\t")
+        headers = []
+
+        for line in message.headers:
+            if line.startswith(obs_fold_continued_leaders):
+                if not headers:
+                    # We received a header line that starts with OWS as described
+                    # in RFC-7230 S3.2.4. This indicates a multiline header, but
+                    # there exists no previous header to which we can attach it.
+                    raise InvalidHeader(
+                        "Header continuation with no previous header: %s" % line
+                    )
+                else:
+                    key, value = headers[-1]
+                    headers[-1] = (key, value + " " + line.strip())
+                    continue
+
+            key, value = line.split(":", 1)
+            headers.append((key, value.strip()))
+
+        return cls(headers)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/connection.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/connection.py
new file mode 100644
index 0000000..6da1cf4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/connection.py
@@ -0,0 +1,423 @@
+from __future__ import absolute_import
+import re
+import datetime
+import logging
+import os
+import socket
+from socket import error as SocketError, timeout as SocketTimeout
+import warnings
+from .packages import six
+from .packages.six.moves.http_client import HTTPConnection as _HTTPConnection
+from .packages.six.moves.http_client import HTTPException  # noqa: F401
+
+try:  # Compiled with SSL?
+    import ssl
+
+    BaseSSLError = ssl.SSLError
+except (ImportError, AttributeError):  # Platform-specific: No SSL.
+    ssl = None
+
+    class BaseSSLError(BaseException):
+        pass
+
+
+try:
+    # Python 3: not a no-op, we're adding this to the namespace so it can be imported.
+    ConnectionError = ConnectionError
+except NameError:
+    # Python 2
+    class ConnectionError(Exception):
+        pass
+
+
+from .exceptions import (
+    NewConnectionError,
+    ConnectTimeoutError,
+    SubjectAltNameWarning,
+    SystemTimeWarning,
+)
+from .packages.ssl_match_hostname import match_hostname, CertificateError
+
+from .util.ssl_ import (
+    resolve_cert_reqs,
+    resolve_ssl_version,
+    assert_fingerprint,
+    create_urllib3_context,
+    ssl_wrap_socket,
+)
+
+
+from .util import connection
+
+from ._collections import HTTPHeaderDict
+
+log = logging.getLogger(__name__)
+
+port_by_scheme = {"http": 80, "https": 443}
+
+# When it comes time to update this value as a part of regular maintenance
+# (ie test_recent_date is failing) update it to ~6 months before the current date.
+RECENT_DATE = datetime.date(2019, 1, 1)
+
+_CONTAINS_CONTROL_CHAR_RE = re.compile(r"[^-!#$%&'*+.^_`|~0-9a-zA-Z]")
+
+
+class DummyConnection(object):
+    """Used to detect a failed ConnectionCls import."""
+
+    pass
+
+
+class HTTPConnection(_HTTPConnection, object):
+    """
+    Based on httplib.HTTPConnection but provides an extra constructor
+    backwards-compatibility layer between older and newer Pythons.
+
+    Additional keyword parameters are used to configure attributes of the connection.
+    Accepted parameters include:
+
+      - ``strict``: See the documentation on :class:`urllib3.connectionpool.HTTPConnectionPool`
+      - ``source_address``: Set the source address for the current connection.
+      - ``socket_options``: Set specific options on the underlying socket. If not specified, then
+        defaults are loaded from ``HTTPConnection.default_socket_options`` which includes disabling
+        Nagle's algorithm (sets TCP_NODELAY to 1) unless the connection is behind a proxy.
+
+        For example, if you wish to enable TCP Keep Alive in addition to the defaults,
+        you might pass::
+
+            HTTPConnection.default_socket_options + [
+                (socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1),
+            ]
+
+        Or you may want to disable the defaults by passing an empty list (e.g., ``[]``).
+    """
+
+    default_port = port_by_scheme["http"]
+
+    #: Disable Nagle's algorithm by default.
+    #: ``[(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]``
+    default_socket_options = [(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]
+
+    #: Whether this connection verifies the host's certificate.
+    is_verified = False
+
+    def __init__(self, *args, **kw):
+        if not six.PY2:
+            kw.pop("strict", None)
+
+        # Pre-set source_address.
+        self.source_address = kw.get("source_address")
+
+        #: The socket options provided by the user. If no options are
+        #: provided, we use the default options.
+        self.socket_options = kw.pop("socket_options", self.default_socket_options)
+
+        _HTTPConnection.__init__(self, *args, **kw)
+
+    @property
+    def host(self):
+        """
+        Getter method to remove any trailing dots that indicate the hostname is an FQDN.
+
+        In general, SSL certificates don't include the trailing dot indicating a
+        fully-qualified domain name, and thus, they don't validate properly when
+        checked against a domain name that includes the dot. In addition, some
+        servers may not expect to receive the trailing dot when provided.
+
+        However, the hostname with trailing dot is critical to DNS resolution; doing a
+        lookup with the trailing dot will properly only resolve the appropriate FQDN,
+        whereas a lookup without a trailing dot will search the system's search domain
+        list. Thus, it's important to keep the original host around for use only in
+        those cases where it's appropriate (i.e., when doing DNS lookup to establish the
+        actual TCP connection across which we're going to send HTTP requests).
+        """
+        return self._dns_host.rstrip(".")
+
+    @host.setter
+    def host(self, value):
+        """
+        Setter for the `host` property.
+
+        We assume that only urllib3 uses the _dns_host attribute; httplib itself
+        only uses `host`, and it seems reasonable that other libraries follow suit.
+        """
+        self._dns_host = value
+
+    def _new_conn(self):
+        """ Establish a socket connection and set nodelay settings on it.
+
+        :return: New socket connection.
+        """
+        extra_kw = {}
+        if self.source_address:
+            extra_kw["source_address"] = self.source_address
+
+        if self.socket_options:
+            extra_kw["socket_options"] = self.socket_options
+
+        try:
+            conn = connection.create_connection(
+                (self._dns_host, self.port), self.timeout, **extra_kw
+            )
+
+        except SocketTimeout:
+            raise ConnectTimeoutError(
+                self,
+                "Connection to %s timed out. (connect timeout=%s)"
+                % (self.host, self.timeout),
+            )
+
+        except SocketError as e:
+            raise NewConnectionError(
+                self, "Failed to establish a new connection: %s" % e
+            )
+
+        return conn
+
+    def _prepare_conn(self, conn):
+        self.sock = conn
+        # Google App Engine's httplib does not define _tunnel_host
+        if getattr(self, "_tunnel_host", None):
+            # TODO: Fix tunnel so it doesn't depend on self.sock state.
+            self._tunnel()
+            # Mark this connection as not reusable
+            self.auto_open = 0
+
+    def connect(self):
+        conn = self._new_conn()
+        self._prepare_conn(conn)
+
+    def putrequest(self, method, url, *args, **kwargs):
+        """Send a request to the server"""
+        match = _CONTAINS_CONTROL_CHAR_RE.search(method)
+        if match:
+            raise ValueError(
+                "Method cannot contain non-token characters %r (found at least %r)"
+                % (method, match.group())
+            )
+
+        return _HTTPConnection.putrequest(self, method, url, *args, **kwargs)
+
+    def request_chunked(self, method, url, body=None, headers=None):
+        """
+        Alternative to the common request method, which sends the
+        body with chunked encoding and not as one block
+        """
+        headers = HTTPHeaderDict(headers if headers is not None else {})
+        skip_accept_encoding = "accept-encoding" in headers
+        skip_host = "host" in headers
+        self.putrequest(
+            method, url, skip_accept_encoding=skip_accept_encoding, skip_host=skip_host
+        )
+        for header, value in headers.items():
+            self.putheader(header, value)
+        if "transfer-encoding" not in headers:
+            self.putheader("Transfer-Encoding", "chunked")
+        self.endheaders()
+
+        if body is not None:
+            stringish_types = six.string_types + (bytes,)
+            if isinstance(body, stringish_types):
+                body = (body,)
+            for chunk in body:
+                if not chunk:
+                    continue
+                if not isinstance(chunk, bytes):
+                    chunk = chunk.encode("utf8")
+                len_str = hex(len(chunk))[2:]
+                self.send(len_str.encode("utf-8"))
+                self.send(b"\r\n")
+                self.send(chunk)
+                self.send(b"\r\n")
+
+        # After the if clause, to always have a closed body
+        self.send(b"0\r\n\r\n")
+
+
+class HTTPSConnection(HTTPConnection):
+    default_port = port_by_scheme["https"]
+
+    cert_reqs = None
+    ca_certs = None
+    ca_cert_dir = None
+    ca_cert_data = None
+    ssl_version = None
+    assert_fingerprint = None
+
+    def __init__(
+        self,
+        host,
+        port=None,
+        key_file=None,
+        cert_file=None,
+        key_password=None,
+        strict=None,
+        timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
+        ssl_context=None,
+        server_hostname=None,
+        **kw
+    ):
+
+        HTTPConnection.__init__(self, host, port, strict=strict, timeout=timeout, **kw)
+
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.key_password = key_password
+        self.ssl_context = ssl_context
+        self.server_hostname = server_hostname
+
+        # Required property for Google AppEngine 1.9.0 which otherwise causes
+        # HTTPS requests to go out as HTTP. (See Issue #356)
+        self._protocol = "https"
+
+    def set_cert(
+        self,
+        key_file=None,
+        cert_file=None,
+        cert_reqs=None,
+        key_password=None,
+        ca_certs=None,
+        assert_hostname=None,
+        assert_fingerprint=None,
+        ca_cert_dir=None,
+        ca_cert_data=None,
+    ):
+        """
+        This method should only be called once, before the connection is used.
+        """
+        # If cert_reqs is not provided we'll assume CERT_REQUIRED unless we also
+        # have an SSLContext object in which case we'll use its verify_mode.
+        if cert_reqs is None:
+            if self.ssl_context is not None:
+                cert_reqs = self.ssl_context.verify_mode
+            else:
+                cert_reqs = resolve_cert_reqs(None)
+
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.cert_reqs = cert_reqs
+        self.key_password = key_password
+        self.assert_hostname = assert_hostname
+        self.assert_fingerprint = assert_fingerprint
+        self.ca_certs = ca_certs and os.path.expanduser(ca_certs)
+        self.ca_cert_dir = ca_cert_dir and os.path.expanduser(ca_cert_dir)
+        self.ca_cert_data = ca_cert_data
+
+    def connect(self):
+        # Add certificate verification
+        conn = self._new_conn()
+        hostname = self.host
+
+        # Google App Engine's httplib does not define _tunnel_host
+        if getattr(self, "_tunnel_host", None):
+            self.sock = conn
+            # Calls self._set_hostport(), so self.host is
+            # self._tunnel_host below.
+            self._tunnel()
+            # Mark this connection as not reusable
+            self.auto_open = 0
+
+            # Override the host with the one we're requesting data from.
+            hostname = self._tunnel_host
+
+        server_hostname = hostname
+        if self.server_hostname is not None:
+            server_hostname = self.server_hostname
+
+        is_time_off = datetime.date.today() < RECENT_DATE
+        if is_time_off:
+            warnings.warn(
+                (
+                    "System time is way off (before {0}). This will probably "
+                    "lead to SSL verification errors"
+                ).format(RECENT_DATE),
+                SystemTimeWarning,
+            )
+
+        # Wrap socket using verification with the root certs in
+        # trusted_root_certs
+        default_ssl_context = False
+        if self.ssl_context is None:
+            default_ssl_context = True
+            self.ssl_context = create_urllib3_context(
+                ssl_version=resolve_ssl_version(self.ssl_version),
+                cert_reqs=resolve_cert_reqs(self.cert_reqs),
+            )
+
+        context = self.ssl_context
+        context.verify_mode = resolve_cert_reqs(self.cert_reqs)
+
+        # Try to load OS default certs if none are given.
+        # Works well on Windows (requires Python3.4+)
+        if (
+            not self.ca_certs
+            and not self.ca_cert_dir
+            and not self.ca_cert_data
+            and default_ssl_context
+            and hasattr(context, "load_default_certs")
+        ):
+            context.load_default_certs()
+
+        self.sock = ssl_wrap_socket(
+            sock=conn,
+            keyfile=self.key_file,
+            certfile=self.cert_file,
+            key_password=self.key_password,
+            ca_certs=self.ca_certs,
+            ca_cert_dir=self.ca_cert_dir,
+            ca_cert_data=self.ca_cert_data,
+            server_hostname=server_hostname,
+            ssl_context=context,
+        )
+
+        if self.assert_fingerprint:
+            assert_fingerprint(
+                self.sock.getpeercert(binary_form=True), self.assert_fingerprint
+            )
+        elif (
+            context.verify_mode != ssl.CERT_NONE
+            and not getattr(context, "check_hostname", False)
+            and self.assert_hostname is not False
+        ):
+            # While urllib3 attempts to always turn off hostname matching from
+            # the TLS library, this cannot always be done. So we check whether
+            # the TLS Library still thinks it's matching hostnames.
+            cert = self.sock.getpeercert()
+            if not cert.get("subjectAltName", ()):
+                warnings.warn(
+                    (
+                        "Certificate for {0} has no `subjectAltName`, falling back to check for a "
+                        "`commonName` for now. This feature is being removed by major browsers and "
+                        "deprecated by RFC 2818. (See https://github.com/urllib3/urllib3/issues/497 "
+                        "for details.)".format(hostname)
+                    ),
+                    SubjectAltNameWarning,
+                )
+            _match_hostname(cert, self.assert_hostname or server_hostname)
+
+        self.is_verified = (
+            context.verify_mode == ssl.CERT_REQUIRED
+            or self.assert_fingerprint is not None
+        )
+
+
+def _match_hostname(cert, asserted_hostname):
+    try:
+        match_hostname(cert, asserted_hostname)
+    except CertificateError as e:
+        log.warning(
+            "Certificate did not match expected hostname: %s. Certificate: %s",
+            asserted_hostname,
+            cert,
+        )
+        # Add cert to exception and reraise so client code can inspect
+        # the cert when catching the exception, if they want to
+        e._peer_cert = cert
+        raise
+
+
+if not ssl:
+    HTTPSConnection = DummyConnection  # noqa: F811
+
+
+VerifiedHTTPSConnection = HTTPSConnection
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/connectionpool.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/connectionpool.py
new file mode 100644
index 0000000..5f044db
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/connectionpool.py
@@ -0,0 +1,1033 @@
+from __future__ import absolute_import
+import errno
+import logging
+import sys
+import warnings
+
+from socket import error as SocketError, timeout as SocketTimeout
+import socket
+
+
+from .exceptions import (
+    ClosedPoolError,
+    ProtocolError,
+    EmptyPoolError,
+    HeaderParsingError,
+    HostChangedError,
+    LocationValueError,
+    MaxRetryError,
+    ProxyError,
+    ReadTimeoutError,
+    SSLError,
+    TimeoutError,
+    InsecureRequestWarning,
+    NewConnectionError,
+)
+from .packages.ssl_match_hostname import CertificateError
+from .packages import six
+from .packages.six.moves import queue
+from .connection import (
+    port_by_scheme,
+    DummyConnection,
+    HTTPConnection,
+    HTTPSConnection,
+    VerifiedHTTPSConnection,
+    HTTPException,
+    BaseSSLError,
+)
+from .request import RequestMethods
+from .response import HTTPResponse
+
+from .util.connection import is_connection_dropped
+from .util.request import set_file_position
+from .util.response import assert_header_parsing
+from .util.retry import Retry
+from .util.timeout import Timeout
+from .util.url import (
+    get_host,
+    parse_url,
+    Url,
+    _normalize_host as normalize_host,
+    _encode_target,
+)
+from .util.queue import LifoQueue
+
+
+xrange = six.moves.xrange
+
+log = logging.getLogger(__name__)
+
+_Default = object()
+
+
+# Pool objects
+class ConnectionPool(object):
+    """
+    Base class for all connection pools, such as
+    :class:`.HTTPConnectionPool` and :class:`.HTTPSConnectionPool`.
+
+    .. note::
+       ConnectionPool.urlopen() does not normalize or percent-encode target URIs
+       which is useful if your target server doesn't support percent-encoded
+       target URIs.
+    """
+
+    scheme = None
+    QueueCls = LifoQueue
+
+    def __init__(self, host, port=None):
+        if not host:
+            raise LocationValueError("No host specified.")
+
+        self.host = _normalize_host(host, scheme=self.scheme)
+        self._proxy_host = host.lower()
+        self.port = port
+
+    def __str__(self):
+        return "%s(host=%r, port=%r)" % (type(self).__name__, self.host, self.port)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.close()
+        # Return False to re-raise any potential exceptions
+        return False
+
+    def close(self):
+        """
+        Close all pooled connections and disable the pool.
+        """
+        pass
+
+
+# This is taken from http://hg.python.org/cpython/file/7aaba721ebc0/Lib/socket.py#l252
+_blocking_errnos = {errno.EAGAIN, errno.EWOULDBLOCK}
+
+
+class HTTPConnectionPool(ConnectionPool, RequestMethods):
+    """
+    Thread-safe connection pool for one host.
+
+    :param host:
+        Host used for this HTTP Connection (e.g. "localhost"), passed into
+        :class:`httplib.HTTPConnection`.
+
+    :param port:
+        Port used for this HTTP Connection (None is equivalent to 80), passed
+        into :class:`httplib.HTTPConnection`.
+
+    :param strict:
+        Causes BadStatusLine to be raised if the status line can't be parsed
+        as a valid HTTP/1.0 or 1.1 status line, passed into
+        :class:`httplib.HTTPConnection`.
+
+        .. note::
+           Only works in Python 2. This parameter is ignored in Python 3.
+
+    :param timeout:
+        Socket timeout in seconds for each individual connection. This can
+        be a float or integer, which sets the timeout for the HTTP request,
+        or an instance of :class:`urllib3.util.Timeout` which gives you more
+        fine-grained control over request timeouts. After the constructor has
+        been parsed, this is always a `urllib3.util.Timeout` object.
+
+    :param maxsize:
+        Number of connections to save that can be reused. More than 1 is useful
+        in multithreaded situations. If ``block`` is set to False, more
+        connections will be created but they will not be saved once they've
+        been used.
+
+    :param block:
+        If set to True, no more than ``maxsize`` connections will be used at
+        a time. When no free connections are available, the call will block
+        until a connection has been released. This is a useful side effect for
+        particular multithreaded situations where one does not want to use more
+        than maxsize connections per host to prevent flooding.
+
+    :param headers:
+        Headers to include with all requests, unless other headers are given
+        explicitly.
+
+    :param retries:
+        Retry configuration to use by default with requests in this pool.
+
+    :param _proxy:
+        Parsed proxy URL, should not be used directly, instead, see
+        :class:`urllib3.connectionpool.ProxyManager`"
+
+    :param _proxy_headers:
+        A dictionary with proxy headers, should not be used directly,
+        instead, see :class:`urllib3.connectionpool.ProxyManager`"
+
+    :param \\**conn_kw:
+        Additional parameters are used to create fresh :class:`urllib3.connection.HTTPConnection`,
+        :class:`urllib3.connection.HTTPSConnection` instances.
+    """
+
+    scheme = "http"
+    ConnectionCls = HTTPConnection
+    ResponseCls = HTTPResponse
+
+    def __init__(
+        self,
+        host,
+        port=None,
+        strict=False,
+        timeout=Timeout.DEFAULT_TIMEOUT,
+        maxsize=1,
+        block=False,
+        headers=None,
+        retries=None,
+        _proxy=None,
+        _proxy_headers=None,
+        **conn_kw
+    ):
+        ConnectionPool.__init__(self, host, port)
+        RequestMethods.__init__(self, headers)
+
+        self.strict = strict
+
+        if not isinstance(timeout, Timeout):
+            timeout = Timeout.from_float(timeout)
+
+        if retries is None:
+            retries = Retry.DEFAULT
+
+        self.timeout = timeout
+        self.retries = retries
+
+        self.pool = self.QueueCls(maxsize)
+        self.block = block
+
+        self.proxy = _proxy
+        self.proxy_headers = _proxy_headers or {}
+
+        # Fill the queue up so that doing get() on it will block properly
+        for _ in xrange(maxsize):
+            self.pool.put(None)
+
+        # These are mostly for testing and debugging purposes.
+        self.num_connections = 0
+        self.num_requests = 0
+        self.conn_kw = conn_kw
+
+        if self.proxy:
+            # Enable Nagle's algorithm for proxies, to avoid packet fragmentation.
+            # We cannot know if the user has added default socket options, so we cannot replace the
+            # list.
+            self.conn_kw.setdefault("socket_options", [])
+
+    def _new_conn(self):
+        """
+        Return a fresh :class:`HTTPConnection`.
+        """
+        self.num_connections += 1
+        log.debug(
+            "Starting new HTTP connection (%d): %s:%s",
+            self.num_connections,
+            self.host,
+            self.port or "80",
+        )
+
+        conn = self.ConnectionCls(
+            host=self.host,
+            port=self.port,
+            timeout=self.timeout.connect_timeout,
+            strict=self.strict,
+            **self.conn_kw
+        )
+        return conn
+
+    def _get_conn(self, timeout=None):
+        """
+        Get a connection. Will return a pooled connection if one is available.
+
+        If no connections are available and :prop:`.block` is ``False``, then a
+        fresh connection is returned.
+
+        :param timeout:
+            Seconds to wait before giving up and raising
+            :class:`urllib3.exceptions.EmptyPoolError` if the pool is empty and
+            :prop:`.block` is ``True``.
+        """
+        conn = None
+        try:
+            conn = self.pool.get(block=self.block, timeout=timeout)
+
+        except AttributeError:  # self.pool is None
+            raise ClosedPoolError(self, "Pool is closed.")
+
+        except queue.Empty:
+            if self.block:
+                raise EmptyPoolError(
+                    self,
+                    "Pool reached maximum size and no more connections are allowed.",
+                )
+            pass  # Oh well, we'll create a new connection then
+
+        # If this is a persistent connection, check if it got disconnected
+        if conn and is_connection_dropped(conn):
+            log.debug("Resetting dropped connection: %s", self.host)
+            conn.close()
+            if getattr(conn, "auto_open", 1) == 0:
+                # This is a proxied connection that has been mutated by
+                # httplib._tunnel() and cannot be reused (since it would
+                # attempt to bypass the proxy)
+                conn = None
+
+        return conn or self._new_conn()
+
+    def _put_conn(self, conn):
+        """
+        Put a connection back into the pool.
+
+        :param conn:
+            Connection object for the current host and port as returned by
+            :meth:`._new_conn` or :meth:`._get_conn`.
+
+        If the pool is already full, the connection is closed and discarded
+        because we exceeded maxsize. If connections are discarded frequently,
+        then maxsize should be increased.
+
+        If the pool is closed, then the connection will be closed and discarded.
+        """
+        try:
+            self.pool.put(conn, block=False)
+            return  # Everything is dandy, done.
+        except AttributeError:
+            # self.pool is None.
+            pass
+        except queue.Full:
+            # This should never happen if self.block == True
+            log.warning("Connection pool is full, discarding connection: %s", self.host)
+
+        # Connection never got put back into the pool, close it.
+        if conn:
+            conn.close()
+
+    def _validate_conn(self, conn):
+        """
+        Called right before a request is made, after the socket is created.
+        """
+        pass
+
+    def _prepare_proxy(self, conn):
+        # Nothing to do for HTTP connections.
+        pass
+
+    def _get_timeout(self, timeout):
+        """ Helper that always returns a :class:`urllib3.util.Timeout` """
+        if timeout is _Default:
+            return self.timeout.clone()
+
+        if isinstance(timeout, Timeout):
+            return timeout.clone()
+        else:
+            # User passed us an int/float. This is for backwards compatibility,
+            # can be removed later
+            return Timeout.from_float(timeout)
+
+    def _raise_timeout(self, err, url, timeout_value):
+        """Is the error actually a timeout? Will raise a ReadTimeout or pass"""
+
+        if isinstance(err, SocketTimeout):
+            raise ReadTimeoutError(
+                self, url, "Read timed out. (read timeout=%s)" % timeout_value
+            )
+
+        # See the above comment about EAGAIN in Python 3. In Python 2 we have
+        # to specifically catch it and throw the timeout error
+        if hasattr(err, "errno") and err.errno in _blocking_errnos:
+            raise ReadTimeoutError(
+                self, url, "Read timed out. (read timeout=%s)" % timeout_value
+            )
+
+        # Catch possible read timeouts thrown as SSL errors. If not the
+        # case, rethrow the original. We need to do this because of:
+        # http://bugs.python.org/issue10272
+        if "timed out" in str(err) or "did not complete (read)" in str(
+            err
+        ):  # Python < 2.7.4
+            raise ReadTimeoutError(
+                self, url, "Read timed out. (read timeout=%s)" % timeout_value
+            )
+
+    def _make_request(
+        self, conn, method, url, timeout=_Default, chunked=False, **httplib_request_kw
+    ):
+        """
+        Perform a request on a given urllib connection object taken from our
+        pool.
+
+        :param conn:
+            a connection from one of our connection pools
+
+        :param timeout:
+            Socket timeout in seconds for the request. This can be a
+            float or integer, which will set the same timeout value for
+            the socket connect and the socket read, or an instance of
+            :class:`urllib3.util.Timeout`, which gives you more fine-grained
+            control over your timeouts.
+        """
+        self.num_requests += 1
+
+        timeout_obj = self._get_timeout(timeout)
+        timeout_obj.start_connect()
+        conn.timeout = timeout_obj.connect_timeout
+
+        # Trigger any extra validation we need to do.
+        try:
+            self._validate_conn(conn)
+        except (SocketTimeout, BaseSSLError) as e:
+            # Py2 raises this as a BaseSSLError, Py3 raises it as socket timeout.
+            self._raise_timeout(err=e, url=url, timeout_value=conn.timeout)
+            raise
+
+        # conn.request() calls httplib.*.request, not the method in
+        # urllib3.request. It also calls makefile (recv) on the socket.
+        if chunked:
+            conn.request_chunked(method, url, **httplib_request_kw)
+        else:
+            conn.request(method, url, **httplib_request_kw)
+
+        # Reset the timeout for the recv() on the socket
+        read_timeout = timeout_obj.read_timeout
+
+        # App Engine doesn't have a sock attr
+        if getattr(conn, "sock", None):
+            # In Python 3 socket.py will catch EAGAIN and return None when you
+            # try and read into the file pointer created by http.client, which
+            # instead raises a BadStatusLine exception. Instead of catching
+            # the exception and assuming all BadStatusLine exceptions are read
+            # timeouts, check for a zero timeout before making the request.
+            if read_timeout == 0:
+                raise ReadTimeoutError(
+                    self, url, "Read timed out. (read timeout=%s)" % read_timeout
+                )
+            if read_timeout is Timeout.DEFAULT_TIMEOUT:
+                conn.sock.settimeout(socket.getdefaulttimeout())
+            else:  # None or a value
+                conn.sock.settimeout(read_timeout)
+
+        # Receive the response from the server
+        try:
+            try:
+                # Python 2.7, use buffering of HTTP responses
+                httplib_response = conn.getresponse(buffering=True)
+            except TypeError:
+                # Python 3
+                try:
+                    httplib_response = conn.getresponse()
+                except BaseException as e:
+                    # Remove the TypeError from the exception chain in
+                    # Python 3 (including for exceptions like SystemExit).
+                    # Otherwise it looks like a bug in the code.
+                    six.raise_from(e, None)
+        except (SocketTimeout, BaseSSLError, SocketError) as e:
+            self._raise_timeout(err=e, url=url, timeout_value=read_timeout)
+            raise
+
+        # AppEngine doesn't have a version attr.
+        http_version = getattr(conn, "_http_vsn_str", "HTTP/?")
+        log.debug(
+            '%s://%s:%s "%s %s %s" %s %s',
+            self.scheme,
+            self.host,
+            self.port,
+            method,
+            url,
+            http_version,
+            httplib_response.status,
+            httplib_response.length,
+        )
+
+        try:
+            assert_header_parsing(httplib_response.msg)
+        except (HeaderParsingError, TypeError) as hpe:  # Platform-specific: Python 3
+            log.warning(
+                "Failed to parse headers (url=%s): %s",
+                self._absolute_url(url),
+                hpe,
+                exc_info=True,
+            )
+
+        return httplib_response
+
+    def _absolute_url(self, path):
+        return Url(scheme=self.scheme, host=self.host, port=self.port, path=path).url
+
+    def close(self):
+        """
+        Close all pooled connections and disable the pool.
+        """
+        if self.pool is None:
+            return
+        # Disable access to the pool
+        old_pool, self.pool = self.pool, None
+
+        try:
+            while True:
+                conn = old_pool.get(block=False)
+                if conn:
+                    conn.close()
+
+        except queue.Empty:
+            pass  # Done.
+
+    def is_same_host(self, url):
+        """
+        Check if the given ``url`` is a member of the same host as this
+        connection pool.
+        """
+        if url.startswith("/"):
+            return True
+
+        # TODO: Add optional support for socket.gethostbyname checking.
+        scheme, host, port = get_host(url)
+        if host is not None:
+            host = _normalize_host(host, scheme=scheme)
+
+        # Use explicit default port for comparison when none is given
+        if self.port and not port:
+            port = port_by_scheme.get(scheme)
+        elif not self.port and port == port_by_scheme.get(scheme):
+            port = None
+
+        return (scheme, host, port) == (self.scheme, self.host, self.port)
+
+    def urlopen(
+        self,
+        method,
+        url,
+        body=None,
+        headers=None,
+        retries=None,
+        redirect=True,
+        assert_same_host=True,
+        timeout=_Default,
+        pool_timeout=None,
+        release_conn=None,
+        chunked=False,
+        body_pos=None,
+        **response_kw
+    ):
+        """
+        Get a connection from the pool and perform an HTTP request. This is the
+        lowest level call for making a request, so you'll need to specify all
+        the raw details.
+
+        .. note::
+
+           More commonly, it's appropriate to use a convenience method provided
+           by :class:`.RequestMethods`, such as :meth:`request`.
+
+        .. note::
+
+           `release_conn` will only behave as expected if
+           `preload_content=False` because we want to make
+           `preload_content=False` the default behaviour someday soon without
+           breaking backwards compatibility.
+
+        :param method:
+            HTTP request method (such as GET, POST, PUT, etc.)
+
+        :param body:
+            Data to send in the request body (useful for creating
+            POST requests, see HTTPConnectionPool.post_url for
+            more convenience).
+
+        :param headers:
+            Dictionary of custom headers to send, such as User-Agent,
+            If-None-Match, etc. If None, pool headers are used. If provided,
+            these headers completely replace any pool-specific headers.
+
+        :param retries:
+            Configure the number of retries to allow before raising a
+            :class:`~urllib3.exceptions.MaxRetryError` exception.
+
+            Pass ``None`` to retry until you receive a response. Pass a
+            :class:`~urllib3.util.retry.Retry` object for fine-grained control
+            over different types of retries.
+            Pass an integer number to retry connection errors that many times,
+            but no other types of errors. Pass zero to never retry.
+
+            If ``False``, then retries are disabled and any exception is raised
+            immediately. Also, instead of raising a MaxRetryError on redirects,
+            the redirect response will be returned.
+
+        :type retries: :class:`~urllib3.util.retry.Retry`, False, or an int.
+
+        :param redirect:
+            If True, automatically handle redirects (status codes 301, 302,
+            303, 307, 308). Each redirect counts as a retry. Disabling retries
+            will disable redirect, too.
+
+        :param assert_same_host:
+            If ``True``, will make sure that the host of the pool requests is
+            consistent else will raise HostChangedError. When False, you can
+            use the pool on an HTTP proxy and request foreign hosts.
+
+        :param timeout:
+            If specified, overrides the default timeout for this one
+            request. It may be a float (in seconds) or an instance of
+            :class:`urllib3.util.Timeout`.
+
+        :param pool_timeout:
+            If set and the pool is set to block=True, then this method will
+            block for ``pool_timeout`` seconds and raise EmptyPoolError if no
+            connection is available within the time period.
+
+        :param release_conn:
+            If False, then the urlopen call will not release the connection
+            back into the pool once a response is received (but will release if
+            you read the entire contents of the response such as when
+            `preload_content=True`). This is useful if you're not preloading
+            the response's content immediately. You will need to call
+            ``r.release_conn()`` on the response ``r`` to return the connection
+            back into the pool. If None, it takes the value of
+            ``response_kw.get('preload_content', True)``.
+
+        :param chunked:
+            If True, urllib3 will send the body using chunked transfer
+            encoding. Otherwise, urllib3 will send the body using the standard
+            content-length form. Defaults to False.
+
+        :param int body_pos:
+            Position to seek to in file-like body in the event of a retry or
+            redirect. Typically this won't need to be set because urllib3 will
+            auto-populate the value when needed.
+
+        :param \\**response_kw:
+            Additional parameters are passed to
+            :meth:`urllib3.response.HTTPResponse.from_httplib`
+        """
+        if headers is None:
+            headers = self.headers
+
+        if not isinstance(retries, Retry):
+            retries = Retry.from_int(retries, redirect=redirect, default=self.retries)
+
+        if release_conn is None:
+            release_conn = response_kw.get("preload_content", True)
+
+        # Check host
+        if assert_same_host and not self.is_same_host(url):
+            raise HostChangedError(self, url, retries)
+
+        # Ensure that the URL we're connecting to is properly encoded
+        if url.startswith("/"):
+            url = six.ensure_str(_encode_target(url))
+        else:
+            url = six.ensure_str(parse_url(url).url)
+
+        conn = None
+
+        # Track whether `conn` needs to be released before
+        # returning/raising/recursing. Update this variable if necessary, and
+        # leave `release_conn` constant throughout the function. That way, if
+        # the function recurses, the original value of `release_conn` will be
+        # passed down into the recursive call, and its value will be respected.
+        #
+        # See issue #651 [1] for details.
+        #
+        # [1] <https://github.com/urllib3/urllib3/issues/651>
+        release_this_conn = release_conn
+
+        # Merge the proxy headers. Only do this in HTTP. We have to copy the
+        # headers dict so we can safely change it without those changes being
+        # reflected in anyone else's copy.
+        if self.scheme == "http":
+            headers = headers.copy()
+            headers.update(self.proxy_headers)
+
+        # Must keep the exception bound to a separate variable or else Python 3
+        # complains about UnboundLocalError.
+        err = None
+
+        # Keep track of whether we cleanly exited the except block. This
+        # ensures we do proper cleanup in finally.
+        clean_exit = False
+
+        # Rewind body position, if needed. Record current position
+        # for future rewinds in the event of a redirect/retry.
+        body_pos = set_file_position(body, body_pos)
+
+        try:
+            # Request a connection from the queue.
+            timeout_obj = self._get_timeout(timeout)
+            conn = self._get_conn(timeout=pool_timeout)
+
+            conn.timeout = timeout_obj.connect_timeout
+
+            is_new_proxy_conn = self.proxy is not None and not getattr(
+                conn, "sock", None
+            )
+            if is_new_proxy_conn:
+                self._prepare_proxy(conn)
+
+            # Make the request on the httplib connection object.
+            httplib_response = self._make_request(
+                conn,
+                method,
+                url,
+                timeout=timeout_obj,
+                body=body,
+                headers=headers,
+                chunked=chunked,
+            )
+
+            # If we're going to release the connection in ``finally:``, then
+            # the response doesn't need to know about the connection. Otherwise
+            # it will also try to release it and we'll have a double-release
+            # mess.
+            response_conn = conn if not release_conn else None
+
+            # Pass method to Response for length checking
+            response_kw["request_method"] = method
+
+            # Import httplib's response into our own wrapper object
+            response = self.ResponseCls.from_httplib(
+                httplib_response,
+                pool=self,
+                connection=response_conn,
+                retries=retries,
+                **response_kw
+            )
+
+            # Everything went great!
+            clean_exit = True
+
+        except queue.Empty:
+            # Timed out by queue.
+            raise EmptyPoolError(self, "No pool connections are available.")
+
+        except (
+            TimeoutError,
+            HTTPException,
+            SocketError,
+            ProtocolError,
+            BaseSSLError,
+            SSLError,
+            CertificateError,
+        ) as e:
+            # Discard the connection for these exceptions. It will be
+            # replaced during the next _get_conn() call.
+            clean_exit = False
+            if isinstance(e, (BaseSSLError, CertificateError)):
+                e = SSLError(e)
+            elif isinstance(e, (SocketError, NewConnectionError)) and self.proxy:
+                e = ProxyError("Cannot connect to proxy.", e)
+            elif isinstance(e, (SocketError, HTTPException)):
+                e = ProtocolError("Connection aborted.", e)
+
+            retries = retries.increment(
+                method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
+            )
+            retries.sleep()
+
+            # Keep track of the error for the retry warning.
+            err = e
+
+        finally:
+            if not clean_exit:
+                # We hit some kind of exception, handled or otherwise. We need
+                # to throw the connection away unless explicitly told not to.
+                # Close the connection, set the variable to None, and make sure
+                # we put the None back in the pool to avoid leaking it.
+                conn = conn and conn.close()
+                release_this_conn = True
+
+            if release_this_conn:
+                # Put the connection back to be reused. If the connection is
+                # expired then it will be None, which will get replaced with a
+                # fresh connection during _get_conn.
+                self._put_conn(conn)
+
+        if not conn:
+            # Try again
+            log.warning(
+                "Retrying (%r) after connection broken by '%r': %s", retries, err, url
+            )
+            return self.urlopen(
+                method,
+                url,
+                body,
+                headers,
+                retries,
+                redirect,
+                assert_same_host,
+                timeout=timeout,
+                pool_timeout=pool_timeout,
+                release_conn=release_conn,
+                chunked=chunked,
+                body_pos=body_pos,
+                **response_kw
+            )
+
+        # Handle redirect?
+        redirect_location = redirect and response.get_redirect_location()
+        if redirect_location:
+            if response.status == 303:
+                method = "GET"
+
+            try:
+                retries = retries.increment(method, url, response=response, _pool=self)
+            except MaxRetryError:
+                if retries.raise_on_redirect:
+                    response.drain_conn()
+                    raise
+                return response
+
+            response.drain_conn()
+            retries.sleep_for_retry(response)
+            log.debug("Redirecting %s -> %s", url, redirect_location)
+            return self.urlopen(
+                method,
+                redirect_location,
+                body,
+                headers,
+                retries=retries,
+                redirect=redirect,
+                assert_same_host=assert_same_host,
+                timeout=timeout,
+                pool_timeout=pool_timeout,
+                release_conn=release_conn,
+                chunked=chunked,
+                body_pos=body_pos,
+                **response_kw
+            )
+
+        # Check if we should retry the HTTP response.
+        has_retry_after = bool(response.getheader("Retry-After"))
+        if retries.is_retry(method, response.status, has_retry_after):
+            try:
+                retries = retries.increment(method, url, response=response, _pool=self)
+            except MaxRetryError:
+                if retries.raise_on_status:
+                    response.drain_conn()
+                    raise
+                return response
+
+            response.drain_conn()
+            retries.sleep(response)
+            log.debug("Retry: %s", url)
+            return self.urlopen(
+                method,
+                url,
+                body,
+                headers,
+                retries=retries,
+                redirect=redirect,
+                assert_same_host=assert_same_host,
+                timeout=timeout,
+                pool_timeout=pool_timeout,
+                release_conn=release_conn,
+                chunked=chunked,
+                body_pos=body_pos,
+                **response_kw
+            )
+
+        return response
+
+
+class HTTPSConnectionPool(HTTPConnectionPool):
+    """
+    Same as :class:`.HTTPConnectionPool`, but HTTPS.
+
+    When Python is compiled with the :mod:`ssl` module, then
+    :class:`.VerifiedHTTPSConnection` is used, which *can* verify certificates,
+    instead of :class:`.HTTPSConnection`.
+
+    :class:`.VerifiedHTTPSConnection` uses one of ``assert_fingerprint``,
+    ``assert_hostname`` and ``host`` in this order to verify connections.
+    If ``assert_hostname`` is False, no verification is done.
+
+    The ``key_file``, ``cert_file``, ``cert_reqs``, ``ca_certs``,
+    ``ca_cert_dir``, ``ssl_version``, ``key_password`` are only used if :mod:`ssl`
+    is available and are fed into :meth:`urllib3.util.ssl_wrap_socket` to upgrade
+    the connection socket into an SSL socket.
+    """
+
+    scheme = "https"
+    ConnectionCls = HTTPSConnection
+
+    def __init__(
+        self,
+        host,
+        port=None,
+        strict=False,
+        timeout=Timeout.DEFAULT_TIMEOUT,
+        maxsize=1,
+        block=False,
+        headers=None,
+        retries=None,
+        _proxy=None,
+        _proxy_headers=None,
+        key_file=None,
+        cert_file=None,
+        cert_reqs=None,
+        key_password=None,
+        ca_certs=None,
+        ssl_version=None,
+        assert_hostname=None,
+        assert_fingerprint=None,
+        ca_cert_dir=None,
+        **conn_kw
+    ):
+
+        HTTPConnectionPool.__init__(
+            self,
+            host,
+            port,
+            strict,
+            timeout,
+            maxsize,
+            block,
+            headers,
+            retries,
+            _proxy,
+            _proxy_headers,
+            **conn_kw
+        )
+
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.cert_reqs = cert_reqs
+        self.key_password = key_password
+        self.ca_certs = ca_certs
+        self.ca_cert_dir = ca_cert_dir
+        self.ssl_version = ssl_version
+        self.assert_hostname = assert_hostname
+        self.assert_fingerprint = assert_fingerprint
+
+    def _prepare_conn(self, conn):
+        """
+        Prepare the ``connection`` for :meth:`urllib3.util.ssl_wrap_socket`
+        and establish the tunnel if proxy is used.
+        """
+
+        if isinstance(conn, VerifiedHTTPSConnection):
+            conn.set_cert(
+                key_file=self.key_file,
+                key_password=self.key_password,
+                cert_file=self.cert_file,
+                cert_reqs=self.cert_reqs,
+                ca_certs=self.ca_certs,
+                ca_cert_dir=self.ca_cert_dir,
+                assert_hostname=self.assert_hostname,
+                assert_fingerprint=self.assert_fingerprint,
+            )
+            conn.ssl_version = self.ssl_version
+        return conn
+
+    def _prepare_proxy(self, conn):
+        """
+        Establish tunnel connection early, because otherwise httplib
+        would improperly set Host: header to proxy's IP:port.
+        """
+        conn.set_tunnel(self._proxy_host, self.port, self.proxy_headers)
+        conn.connect()
+
+    def _new_conn(self):
+        """
+        Return a fresh :class:`httplib.HTTPSConnection`.
+        """
+        self.num_connections += 1
+        log.debug(
+            "Starting new HTTPS connection (%d): %s:%s",
+            self.num_connections,
+            self.host,
+            self.port or "443",
+        )
+
+        if not self.ConnectionCls or self.ConnectionCls is DummyConnection:
+            raise SSLError(
+                "Can't connect to HTTPS URL because the SSL module is not available."
+            )
+
+        actual_host = self.host
+        actual_port = self.port
+        if self.proxy is not None:
+            actual_host = self.proxy.host
+            actual_port = self.proxy.port
+
+        conn = self.ConnectionCls(
+            host=actual_host,
+            port=actual_port,
+            timeout=self.timeout.connect_timeout,
+            strict=self.strict,
+            cert_file=self.cert_file,
+            key_file=self.key_file,
+            key_password=self.key_password,
+            **self.conn_kw
+        )
+
+        return self._prepare_conn(conn)
+
+    def _validate_conn(self, conn):
+        """
+        Called right before a request is made, after the socket is created.
+        """
+        super(HTTPSConnectionPool, self)._validate_conn(conn)
+
+        # Force connect early to allow us to validate the connection.
+        if not getattr(conn, "sock", None):  # AppEngine might not have  `.sock`
+            conn.connect()
+
+        if not conn.is_verified:
+            warnings.warn(
+                (
+                    "Unverified HTTPS request is being made to host '%s'. "
+                    "Adding certificate verification is strongly advised. See: "
+                    "https://urllib3.readthedocs.io/en/latest/advanced-usage.html"
+                    "#ssl-warnings" % conn.host
+                ),
+                InsecureRequestWarning,
+            )
+
+
+def connection_from_url(url, **kw):
+    """
+    Given a url, return an :class:`.ConnectionPool` instance of its host.
+
+    This is a shortcut for not having to parse out the scheme, host, and port
+    of the url before creating an :class:`.ConnectionPool` instance.
+
+    :param url:
+        Absolute URL string that must include the scheme. Port is optional.
+
+    :param \\**kw:
+        Passes additional parameters to the constructor of the appropriate
+        :class:`.ConnectionPool`. Useful for specifying things like
+        timeout, maxsize, headers, etc.
+
+    Example::
+
+        >>> conn = connection_from_url('http://google.com/')
+        >>> r = conn.request('GET', '/')
+    """
+    scheme, host, port = get_host(url)
+    port = port or port_by_scheme.get(scheme, 80)
+    if scheme == "https":
+        return HTTPSConnectionPool(host, port=port, **kw)
+    else:
+        return HTTPConnectionPool(host, port=port, **kw)
+
+
+def _normalize_host(host, scheme):
+    """
+    Normalize hosts for comparisons and use with sockets.
+    """
+
+    host = normalize_host(host, scheme)
+
+    # httplib doesn't like it when we include brackets in IPv6 addresses
+    # Specifically, if we include brackets but also pass the port then
+    # httplib crazily doubles up the square brackets on the Host header.
+    # Instead, we need to make sure we never pass ``None`` as the port.
+    # However, for backward compatibility reasons we can't actually
+    # *assert* that.  See http://bugs.python.org/issue28539
+    if host.startswith("[") and host.endswith("]"):
+        host = host[1:-1]
+    return host
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--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/_appengine_environ.py
@@ -0,0 +1,36 @@
+"""
+This module provides means to detect the App Engine environment.
+"""
+
+import os
+
+
+def is_appengine():
+    return is_local_appengine() or is_prod_appengine()
+
+
+def is_appengine_sandbox():
+    """Reports if the app is running in the first generation sandbox.
+
+    The second generation runtimes are technically still in a sandbox, but it
+    is much less restrictive, so generally you shouldn't need to check for it.
+    see https://cloud.google.com/appengine/docs/standard/runtimes
+    """
+    return is_appengine() and os.environ["APPENGINE_RUNTIME"] == "python27"
+
+
+def is_local_appengine():
+    return "APPENGINE_RUNTIME" in os.environ and os.environ.get(
+        "SERVER_SOFTWARE", ""
+    ).startswith("Development/")
+
+
+def is_prod_appengine():
+    return "APPENGINE_RUNTIME" in os.environ and os.environ.get(
+        "SERVER_SOFTWARE", ""
+    ).startswith("Google App Engine/")
+
+
+def is_prod_appengine_mvms():
+    """Deprecated."""
+    return False
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+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/_securetransport/bindings.py
@@ -0,0 +1,493 @@
+"""
+This module uses ctypes to bind a whole bunch of functions and constants from
+SecureTransport. The goal here is to provide the low-level API to
+SecureTransport. These are essentially the C-level functions and constants, and
+they're pretty gross to work with.
+
+This code is a bastardised version of the code found in Will Bond's oscrypto
+library. An enormous debt is owed to him for blazing this trail for us. For
+that reason, this code should be considered to be covered both by urllib3's
+license and by oscrypto's:
+
+    Copyright (c) 2015-2016 Will Bond <will@wbond.net>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+"""
+from __future__ import absolute_import
+
+import platform
+from ctypes.util import find_library
+from ctypes import (
+    c_void_p,
+    c_int32,
+    c_char_p,
+    c_size_t,
+    c_byte,
+    c_uint32,
+    c_ulong,
+    c_long,
+    c_bool,
+)
+from ctypes import CDLL, POINTER, CFUNCTYPE
+
+
+security_path = find_library("Security")
+if not security_path:
+    raise ImportError("The library Security could not be found")
+
+
+core_foundation_path = find_library("CoreFoundation")
+if not core_foundation_path:
+    raise ImportError("The library CoreFoundation could not be found")
+
+
+version = platform.mac_ver()[0]
+version_info = tuple(map(int, version.split(".")))
+if version_info < (10, 8):
+    raise OSError(
+        "Only OS X 10.8 and newer are supported, not %s.%s"
+        % (version_info[0], version_info[1])
+    )
+
+Security = CDLL(security_path, use_errno=True)
+CoreFoundation = CDLL(core_foundation_path, use_errno=True)
+
+Boolean = c_bool
+CFIndex = c_long
+CFStringEncoding = c_uint32
+CFData = c_void_p
+CFString = c_void_p
+CFArray = c_void_p
+CFMutableArray = c_void_p
+CFDictionary = c_void_p
+CFError = c_void_p
+CFType = c_void_p
+CFTypeID = c_ulong
+
+CFTypeRef = POINTER(CFType)
+CFAllocatorRef = c_void_p
+
+OSStatus = c_int32
+
+CFDataRef = POINTER(CFData)
+CFStringRef = POINTER(CFString)
+CFArrayRef = POINTER(CFArray)
+CFMutableArrayRef = POINTER(CFMutableArray)
+CFDictionaryRef = POINTER(CFDictionary)
+CFArrayCallBacks = c_void_p
+CFDictionaryKeyCallBacks = c_void_p
+CFDictionaryValueCallBacks = c_void_p
+
+SecCertificateRef = POINTER(c_void_p)
+SecExternalFormat = c_uint32
+SecExternalItemType = c_uint32
+SecIdentityRef = POINTER(c_void_p)
+SecItemImportExportFlags = c_uint32
+SecItemImportExportKeyParameters = c_void_p
+SecKeychainRef = POINTER(c_void_p)
+SSLProtocol = c_uint32
+SSLCipherSuite = c_uint32
+SSLContextRef = POINTER(c_void_p)
+SecTrustRef = POINTER(c_void_p)
+SSLConnectionRef = c_uint32
+SecTrustResultType = c_uint32
+SecTrustOptionFlags = c_uint32
+SSLProtocolSide = c_uint32
+SSLConnectionType = c_uint32
+SSLSessionOption = c_uint32
+
+
+try:
+    Security.SecItemImport.argtypes = [
+        CFDataRef,
+        CFStringRef,
+        POINTER(SecExternalFormat),
+        POINTER(SecExternalItemType),
+        SecItemImportExportFlags,
+        POINTER(SecItemImportExportKeyParameters),
+        SecKeychainRef,
+        POINTER(CFArrayRef),
+    ]
+    Security.SecItemImport.restype = OSStatus
+
+    Security.SecCertificateGetTypeID.argtypes = []
+    Security.SecCertificateGetTypeID.restype = CFTypeID
+
+    Security.SecIdentityGetTypeID.argtypes = []
+    Security.SecIdentityGetTypeID.restype = CFTypeID
+
+    Security.SecKeyGetTypeID.argtypes = []
+    Security.SecKeyGetTypeID.restype = CFTypeID
+
+    Security.SecCertificateCreateWithData.argtypes = [CFAllocatorRef, CFDataRef]
+    Security.SecCertificateCreateWithData.restype = SecCertificateRef
+
+    Security.SecCertificateCopyData.argtypes = [SecCertificateRef]
+    Security.SecCertificateCopyData.restype = CFDataRef
+
+    Security.SecCopyErrorMessageString.argtypes = [OSStatus, c_void_p]
+    Security.SecCopyErrorMessageString.restype = CFStringRef
+
+    Security.SecIdentityCreateWithCertificate.argtypes = [
+        CFTypeRef,
+        SecCertificateRef,
+        POINTER(SecIdentityRef),
+    ]
+    Security.SecIdentityCreateWithCertificate.restype = OSStatus
+
+    Security.SecKeychainCreate.argtypes = [
+        c_char_p,
+        c_uint32,
+        c_void_p,
+        Boolean,
+        c_void_p,
+        POINTER(SecKeychainRef),
+    ]
+    Security.SecKeychainCreate.restype = OSStatus
+
+    Security.SecKeychainDelete.argtypes = [SecKeychainRef]
+    Security.SecKeychainDelete.restype = OSStatus
+
+    Security.SecPKCS12Import.argtypes = [
+        CFDataRef,
+        CFDictionaryRef,
+        POINTER(CFArrayRef),
+    ]
+    Security.SecPKCS12Import.restype = OSStatus
+
+    SSLReadFunc = CFUNCTYPE(OSStatus, SSLConnectionRef, c_void_p, POINTER(c_size_t))
+    SSLWriteFunc = CFUNCTYPE(
+        OSStatus, SSLConnectionRef, POINTER(c_byte), POINTER(c_size_t)
+    )
+
+    Security.SSLSetIOFuncs.argtypes = [SSLContextRef, SSLReadFunc, SSLWriteFunc]
+    Security.SSLSetIOFuncs.restype = OSStatus
+
+    Security.SSLSetPeerID.argtypes = [SSLContextRef, c_char_p, c_size_t]
+    Security.SSLSetPeerID.restype = OSStatus
+
+    Security.SSLSetCertificate.argtypes = [SSLContextRef, CFArrayRef]
+    Security.SSLSetCertificate.restype = OSStatus
+
+    Security.SSLSetCertificateAuthorities.argtypes = [SSLContextRef, CFTypeRef, Boolean]
+    Security.SSLSetCertificateAuthorities.restype = OSStatus
+
+    Security.SSLSetConnection.argtypes = [SSLContextRef, SSLConnectionRef]
+    Security.SSLSetConnection.restype = OSStatus
+
+    Security.SSLSetPeerDomainName.argtypes = [SSLContextRef, c_char_p, c_size_t]
+    Security.SSLSetPeerDomainName.restype = OSStatus
+
+    Security.SSLHandshake.argtypes = [SSLContextRef]
+    Security.SSLHandshake.restype = OSStatus
+
+    Security.SSLRead.argtypes = [SSLContextRef, c_char_p, c_size_t, POINTER(c_size_t)]
+    Security.SSLRead.restype = OSStatus
+
+    Security.SSLWrite.argtypes = [SSLContextRef, c_char_p, c_size_t, POINTER(c_size_t)]
+    Security.SSLWrite.restype = OSStatus
+
+    Security.SSLClose.argtypes = [SSLContextRef]
+    Security.SSLClose.restype = OSStatus
+
+    Security.SSLGetNumberSupportedCiphers.argtypes = [SSLContextRef, POINTER(c_size_t)]
+    Security.SSLGetNumberSupportedCiphers.restype = OSStatus
+
+    Security.SSLGetSupportedCiphers.argtypes = [
+        SSLContextRef,
+        POINTER(SSLCipherSuite),
+        POINTER(c_size_t),
+    ]
+    Security.SSLGetSupportedCiphers.restype = OSStatus
+
+    Security.SSLSetEnabledCiphers.argtypes = [
+        SSLContextRef,
+        POINTER(SSLCipherSuite),
+        c_size_t,
+    ]
+    Security.SSLSetEnabledCiphers.restype = OSStatus
+
+    Security.SSLGetNumberEnabledCiphers.argtype = [SSLContextRef, POINTER(c_size_t)]
+    Security.SSLGetNumberEnabledCiphers.restype = OSStatus
+
+    Security.SSLGetEnabledCiphers.argtypes = [
+        SSLContextRef,
+        POINTER(SSLCipherSuite),
+        POINTER(c_size_t),
+    ]
+    Security.SSLGetEnabledCiphers.restype = OSStatus
+
+    Security.SSLGetNegotiatedCipher.argtypes = [SSLContextRef, POINTER(SSLCipherSuite)]
+    Security.SSLGetNegotiatedCipher.restype = OSStatus
+
+    Security.SSLGetNegotiatedProtocolVersion.argtypes = [
+        SSLContextRef,
+        POINTER(SSLProtocol),
+    ]
+    Security.SSLGetNegotiatedProtocolVersion.restype = OSStatus
+
+    Security.SSLCopyPeerTrust.argtypes = [SSLContextRef, POINTER(SecTrustRef)]
+    Security.SSLCopyPeerTrust.restype = OSStatus
+
+    Security.SecTrustSetAnchorCertificates.argtypes = [SecTrustRef, CFArrayRef]
+    Security.SecTrustSetAnchorCertificates.restype = OSStatus
+
+    Security.SecTrustSetAnchorCertificatesOnly.argstypes = [SecTrustRef, Boolean]
+    Security.SecTrustSetAnchorCertificatesOnly.restype = OSStatus
+
+    Security.SecTrustEvaluate.argtypes = [SecTrustRef, POINTER(SecTrustResultType)]
+    Security.SecTrustEvaluate.restype = OSStatus
+
+    Security.SecTrustGetCertificateCount.argtypes = [SecTrustRef]
+    Security.SecTrustGetCertificateCount.restype = CFIndex
+
+    Security.SecTrustGetCertificateAtIndex.argtypes = [SecTrustRef, CFIndex]
+    Security.SecTrustGetCertificateAtIndex.restype = SecCertificateRef
+
+    Security.SSLCreateContext.argtypes = [
+        CFAllocatorRef,
+        SSLProtocolSide,
+        SSLConnectionType,
+    ]
+    Security.SSLCreateContext.restype = SSLContextRef
+
+    Security.SSLSetSessionOption.argtypes = [SSLContextRef, SSLSessionOption, Boolean]
+    Security.SSLSetSessionOption.restype = OSStatus
+
+    Security.SSLSetProtocolVersionMin.argtypes = [SSLContextRef, SSLProtocol]
+    Security.SSLSetProtocolVersionMin.restype = OSStatus
+
+    Security.SSLSetProtocolVersionMax.argtypes = [SSLContextRef, SSLProtocol]
+    Security.SSLSetProtocolVersionMax.restype = OSStatus
+
+    Security.SecCopyErrorMessageString.argtypes = [OSStatus, c_void_p]
+    Security.SecCopyErrorMessageString.restype = CFStringRef
+
+    Security.SSLReadFunc = SSLReadFunc
+    Security.SSLWriteFunc = SSLWriteFunc
+    Security.SSLContextRef = SSLContextRef
+    Security.SSLProtocol = SSLProtocol
+    Security.SSLCipherSuite = SSLCipherSuite
+    Security.SecIdentityRef = SecIdentityRef
+    Security.SecKeychainRef = SecKeychainRef
+    Security.SecTrustRef = SecTrustRef
+    Security.SecTrustResultType = SecTrustResultType
+    Security.SecExternalFormat = SecExternalFormat
+    Security.OSStatus = OSStatus
+
+    Security.kSecImportExportPassphrase = CFStringRef.in_dll(
+        Security, "kSecImportExportPassphrase"
+    )
+    Security.kSecImportItemIdentity = CFStringRef.in_dll(
+        Security, "kSecImportItemIdentity"
+    )
+
+    # CoreFoundation time!
+    CoreFoundation.CFRetain.argtypes = [CFTypeRef]
+    CoreFoundation.CFRetain.restype = CFTypeRef
+
+    CoreFoundation.CFRelease.argtypes = [CFTypeRef]
+    CoreFoundation.CFRelease.restype = None
+
+    CoreFoundation.CFGetTypeID.argtypes = [CFTypeRef]
+    CoreFoundation.CFGetTypeID.restype = CFTypeID
+
+    CoreFoundation.CFStringCreateWithCString.argtypes = [
+        CFAllocatorRef,
+        c_char_p,
+        CFStringEncoding,
+    ]
+    CoreFoundation.CFStringCreateWithCString.restype = CFStringRef
+
+    CoreFoundation.CFStringGetCStringPtr.argtypes = [CFStringRef, CFStringEncoding]
+    CoreFoundation.CFStringGetCStringPtr.restype = c_char_p
+
+    CoreFoundation.CFStringGetCString.argtypes = [
+        CFStringRef,
+        c_char_p,
+        CFIndex,
+        CFStringEncoding,
+    ]
+    CoreFoundation.CFStringGetCString.restype = c_bool
+
+    CoreFoundation.CFDataCreate.argtypes = [CFAllocatorRef, c_char_p, CFIndex]
+    CoreFoundation.CFDataCreate.restype = CFDataRef
+
+    CoreFoundation.CFDataGetLength.argtypes = [CFDataRef]
+    CoreFoundation.CFDataGetLength.restype = CFIndex
+
+    CoreFoundation.CFDataGetBytePtr.argtypes = [CFDataRef]
+    CoreFoundation.CFDataGetBytePtr.restype = c_void_p
+
+    CoreFoundation.CFDictionaryCreate.argtypes = [
+        CFAllocatorRef,
+        POINTER(CFTypeRef),
+        POINTER(CFTypeRef),
+        CFIndex,
+        CFDictionaryKeyCallBacks,
+        CFDictionaryValueCallBacks,
+    ]
+    CoreFoundation.CFDictionaryCreate.restype = CFDictionaryRef
+
+    CoreFoundation.CFDictionaryGetValue.argtypes = [CFDictionaryRef, CFTypeRef]
+    CoreFoundation.CFDictionaryGetValue.restype = CFTypeRef
+
+    CoreFoundation.CFArrayCreate.argtypes = [
+        CFAllocatorRef,
+        POINTER(CFTypeRef),
+        CFIndex,
+        CFArrayCallBacks,
+    ]
+    CoreFoundation.CFArrayCreate.restype = CFArrayRef
+
+    CoreFoundation.CFArrayCreateMutable.argtypes = [
+        CFAllocatorRef,
+        CFIndex,
+        CFArrayCallBacks,
+    ]
+    CoreFoundation.CFArrayCreateMutable.restype = CFMutableArrayRef
+
+    CoreFoundation.CFArrayAppendValue.argtypes = [CFMutableArrayRef, c_void_p]
+    CoreFoundation.CFArrayAppendValue.restype = None
+
+    CoreFoundation.CFArrayGetCount.argtypes = [CFArrayRef]
+    CoreFoundation.CFArrayGetCount.restype = CFIndex
+
+    CoreFoundation.CFArrayGetValueAtIndex.argtypes = [CFArrayRef, CFIndex]
+    CoreFoundation.CFArrayGetValueAtIndex.restype = c_void_p
+
+    CoreFoundation.kCFAllocatorDefault = CFAllocatorRef.in_dll(
+        CoreFoundation, "kCFAllocatorDefault"
+    )
+    CoreFoundation.kCFTypeArrayCallBacks = c_void_p.in_dll(
+        CoreFoundation, "kCFTypeArrayCallBacks"
+    )
+    CoreFoundation.kCFTypeDictionaryKeyCallBacks = c_void_p.in_dll(
+        CoreFoundation, "kCFTypeDictionaryKeyCallBacks"
+    )
+    CoreFoundation.kCFTypeDictionaryValueCallBacks = c_void_p.in_dll(
+        CoreFoundation, "kCFTypeDictionaryValueCallBacks"
+    )
+
+    CoreFoundation.CFTypeRef = CFTypeRef
+    CoreFoundation.CFArrayRef = CFArrayRef
+    CoreFoundation.CFStringRef = CFStringRef
+    CoreFoundation.CFDictionaryRef = CFDictionaryRef
+
+except (AttributeError):
+    raise ImportError("Error initializing ctypes")
+
+
+class CFConst(object):
+    """
+    A class object that acts as essentially a namespace for CoreFoundation
+    constants.
+    """
+
+    kCFStringEncodingUTF8 = CFStringEncoding(0x08000100)
+
+
+class SecurityConst(object):
+    """
+    A class object that acts as essentially a namespace for Security constants.
+    """
+
+    kSSLSessionOptionBreakOnServerAuth = 0
+
+    kSSLProtocol2 = 1
+    kSSLProtocol3 = 2
+    kTLSProtocol1 = 4
+    kTLSProtocol11 = 7
+    kTLSProtocol12 = 8
+    # SecureTransport does not support TLS 1.3 even if there's a constant for it
+    kTLSProtocol13 = 10
+    kTLSProtocolMaxSupported = 999
+
+    kSSLClientSide = 1
+    kSSLStreamType = 0
+
+    kSecFormatPEMSequence = 10
+
+    kSecTrustResultInvalid = 0
+    kSecTrustResultProceed = 1
+    # This gap is present on purpose: this was kSecTrustResultConfirm, which
+    # is deprecated.
+    kSecTrustResultDeny = 3
+    kSecTrustResultUnspecified = 4
+    kSecTrustResultRecoverableTrustFailure = 5
+    kSecTrustResultFatalTrustFailure = 6
+    kSecTrustResultOtherError = 7
+
+    errSSLProtocol = -9800
+    errSSLWouldBlock = -9803
+    errSSLClosedGraceful = -9805
+    errSSLClosedNoNotify = -9816
+    errSSLClosedAbort = -9806
+
+    errSSLXCertChainInvalid = -9807
+    errSSLCrypto = -9809
+    errSSLInternal = -9810
+    errSSLCertExpired = -9814
+    errSSLCertNotYetValid = -9815
+    errSSLUnknownRootCert = -9812
+    errSSLNoRootCert = -9813
+    errSSLHostNameMismatch = -9843
+    errSSLPeerHandshakeFail = -9824
+    errSSLPeerUserCancelled = -9839
+    errSSLWeakPeerEphemeralDHKey = -9850
+    errSSLServerAuthCompleted = -9841
+    errSSLRecordOverflow = -9847
+
+    errSecVerifyFailed = -67808
+    errSecNoTrustSettings = -25263
+    errSecItemNotFound = -25300
+    errSecInvalidTrustSettings = -25262
+
+    # Cipher suites. We only pick the ones our default cipher string allows.
+    # Source: https://developer.apple.com/documentation/security/1550981-ssl_cipher_suite_values
+    TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 = 0xC02C
+    TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 = 0xC030
+    TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 = 0xC02B
+    TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 = 0xC02F
+    TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 = 0xCCA9
+    TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = 0xCCA8
+    TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 = 0x009F
+    TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 = 0x009E
+    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 = 0xC024
+    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 = 0xC028
+    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA = 0xC00A
+    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA = 0xC014
+    TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 = 0x006B
+    TLS_DHE_RSA_WITH_AES_256_CBC_SHA = 0x0039
+    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 = 0xC023
+    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 = 0xC027
+    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA = 0xC009
+    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA = 0xC013
+    TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 = 0x0067
+    TLS_DHE_RSA_WITH_AES_128_CBC_SHA = 0x0033
+    TLS_RSA_WITH_AES_256_GCM_SHA384 = 0x009D
+    TLS_RSA_WITH_AES_128_GCM_SHA256 = 0x009C
+    TLS_RSA_WITH_AES_256_CBC_SHA256 = 0x003D
+    TLS_RSA_WITH_AES_128_CBC_SHA256 = 0x003C
+    TLS_RSA_WITH_AES_256_CBC_SHA = 0x0035
+    TLS_RSA_WITH_AES_128_CBC_SHA = 0x002F
+    TLS_AES_128_GCM_SHA256 = 0x1301
+    TLS_AES_256_GCM_SHA384 = 0x1302
+    TLS_AES_128_CCM_8_SHA256 = 0x1305
+    TLS_AES_128_CCM_SHA256 = 0x1304
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/_securetransport/low_level.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/_securetransport/low_level.py
new file mode 100644
index 0000000..e60168c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/_securetransport/low_level.py
@@ -0,0 +1,328 @@
+"""
+Low-level helpers for the SecureTransport bindings.
+
+These are Python functions that are not directly related to the high-level APIs
+but are necessary to get them to work. They include a whole bunch of low-level
+CoreFoundation messing about and memory management. The concerns in this module
+are almost entirely about trying to avoid memory leaks and providing
+appropriate and useful assistance to the higher-level code.
+"""
+import base64
+import ctypes
+import itertools
+import re
+import os
+import ssl
+import tempfile
+
+from .bindings import Security, CoreFoundation, CFConst
+
+
+# This regular expression is used to grab PEM data out of a PEM bundle.
+_PEM_CERTS_RE = re.compile(
+    b"-----BEGIN CERTIFICATE-----\n(.*?)\n-----END CERTIFICATE-----", re.DOTALL
+)
+
+
+def _cf_data_from_bytes(bytestring):
+    """
+    Given a bytestring, create a CFData object from it. This CFData object must
+    be CFReleased by the caller.
+    """
+    return CoreFoundation.CFDataCreate(
+        CoreFoundation.kCFAllocatorDefault, bytestring, len(bytestring)
+    )
+
+
+def _cf_dictionary_from_tuples(tuples):
+    """
+    Given a list of Python tuples, create an associated CFDictionary.
+    """
+    dictionary_size = len(tuples)
+
+    # We need to get the dictionary keys and values out in the same order.
+    keys = (t[0] for t in tuples)
+    values = (t[1] for t in tuples)
+    cf_keys = (CoreFoundation.CFTypeRef * dictionary_size)(*keys)
+    cf_values = (CoreFoundation.CFTypeRef * dictionary_size)(*values)
+
+    return CoreFoundation.CFDictionaryCreate(
+        CoreFoundation.kCFAllocatorDefault,
+        cf_keys,
+        cf_values,
+        dictionary_size,
+        CoreFoundation.kCFTypeDictionaryKeyCallBacks,
+        CoreFoundation.kCFTypeDictionaryValueCallBacks,
+    )
+
+
+def _cf_string_to_unicode(value):
+    """
+    Creates a Unicode string from a CFString object. Used entirely for error
+    reporting.
+
+    Yes, it annoys me quite a lot that this function is this complex.
+    """
+    value_as_void_p = ctypes.cast(value, ctypes.POINTER(ctypes.c_void_p))
+
+    string = CoreFoundation.CFStringGetCStringPtr(
+        value_as_void_p, CFConst.kCFStringEncodingUTF8
+    )
+    if string is None:
+        buffer = ctypes.create_string_buffer(1024)
+        result = CoreFoundation.CFStringGetCString(
+            value_as_void_p, buffer, 1024, CFConst.kCFStringEncodingUTF8
+        )
+        if not result:
+            raise OSError("Error copying C string from CFStringRef")
+        string = buffer.value
+    if string is not None:
+        string = string.decode("utf-8")
+    return string
+
+
+def _assert_no_error(error, exception_class=None):
+    """
+    Checks the return code and throws an exception if there is an error to
+    report
+    """
+    if error == 0:
+        return
+
+    cf_error_string = Security.SecCopyErrorMessageString(error, None)
+    output = _cf_string_to_unicode(cf_error_string)
+    CoreFoundation.CFRelease(cf_error_string)
+
+    if output is None or output == u"":
+        output = u"OSStatus %s" % error
+
+    if exception_class is None:
+        exception_class = ssl.SSLError
+
+    raise exception_class(output)
+
+
+def _cert_array_from_pem(pem_bundle):
+    """
+    Given a bundle of certs in PEM format, turns them into a CFArray of certs
+    that can be used to validate a cert chain.
+    """
+    # Normalize the PEM bundle's line endings.
+    pem_bundle = pem_bundle.replace(b"\r\n", b"\n")
+
+    der_certs = [
+        base64.b64decode(match.group(1)) for match in _PEM_CERTS_RE.finditer(pem_bundle)
+    ]
+    if not der_certs:
+        raise ssl.SSLError("No root certificates specified")
+
+    cert_array = CoreFoundation.CFArrayCreateMutable(
+        CoreFoundation.kCFAllocatorDefault,
+        0,
+        ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks),
+    )
+    if not cert_array:
+        raise ssl.SSLError("Unable to allocate memory!")
+
+    try:
+        for der_bytes in der_certs:
+            certdata = _cf_data_from_bytes(der_bytes)
+            if not certdata:
+                raise ssl.SSLError("Unable to allocate memory!")
+            cert = Security.SecCertificateCreateWithData(
+                CoreFoundation.kCFAllocatorDefault, certdata
+            )
+            CoreFoundation.CFRelease(certdata)
+            if not cert:
+                raise ssl.SSLError("Unable to build cert object!")
+
+            CoreFoundation.CFArrayAppendValue(cert_array, cert)
+            CoreFoundation.CFRelease(cert)
+    except Exception:
+        # We need to free the array before the exception bubbles further.
+        # We only want to do that if an error occurs: otherwise, the caller
+        # should free.
+        CoreFoundation.CFRelease(cert_array)
+
+    return cert_array
+
+
+def _is_cert(item):
+    """
+    Returns True if a given CFTypeRef is a certificate.
+    """
+    expected = Security.SecCertificateGetTypeID()
+    return CoreFoundation.CFGetTypeID(item) == expected
+
+
+def _is_identity(item):
+    """
+    Returns True if a given CFTypeRef is an identity.
+    """
+    expected = Security.SecIdentityGetTypeID()
+    return CoreFoundation.CFGetTypeID(item) == expected
+
+
+def _temporary_keychain():
+    """
+    This function creates a temporary Mac keychain that we can use to work with
+    credentials. This keychain uses a one-time password and a temporary file to
+    store the data. We expect to have one keychain per socket. The returned
+    SecKeychainRef must be freed by the caller, including calling
+    SecKeychainDelete.
+
+    Returns a tuple of the SecKeychainRef and the path to the temporary
+    directory that contains it.
+    """
+    # Unfortunately, SecKeychainCreate requires a path to a keychain. This
+    # means we cannot use mkstemp to use a generic temporary file. Instead,
+    # we're going to create a temporary directory and a filename to use there.
+    # This filename will be 8 random bytes expanded into base64. We also need
+    # some random bytes to password-protect the keychain we're creating, so we
+    # ask for 40 random bytes.
+    random_bytes = os.urandom(40)
+    filename = base64.b16encode(random_bytes[:8]).decode("utf-8")
+    password = base64.b16encode(random_bytes[8:])  # Must be valid UTF-8
+    tempdirectory = tempfile.mkdtemp()
+
+    keychain_path = os.path.join(tempdirectory, filename).encode("utf-8")
+
+    # We now want to create the keychain itself.
+    keychain = Security.SecKeychainRef()
+    status = Security.SecKeychainCreate(
+        keychain_path, len(password), password, False, None, ctypes.byref(keychain)
+    )
+    _assert_no_error(status)
+
+    # Having created the keychain, we want to pass it off to the caller.
+    return keychain, tempdirectory
+
+
+def _load_items_from_file(keychain, path):
+    """
+    Given a single file, loads all the trust objects from it into arrays and
+    the keychain.
+    Returns a tuple of lists: the first list is a list of identities, the
+    second a list of certs.
+    """
+    certificates = []
+    identities = []
+    result_array = None
+
+    with open(path, "rb") as f:
+        raw_filedata = f.read()
+
+    try:
+        filedata = CoreFoundation.CFDataCreate(
+            CoreFoundation.kCFAllocatorDefault, raw_filedata, len(raw_filedata)
+        )
+        result_array = CoreFoundation.CFArrayRef()
+        result = Security.SecItemImport(
+            filedata,  # cert data
+            None,  # Filename, leaving it out for now
+            None,  # What the type of the file is, we don't care
+            None,  # what's in the file, we don't care
+            0,  # import flags
+            None,  # key params, can include passphrase in the future
+            keychain,  # The keychain to insert into
+            ctypes.byref(result_array),  # Results
+        )
+        _assert_no_error(result)
+
+        # A CFArray is not very useful to us as an intermediary
+        # representation, so we are going to extract the objects we want
+        # and then free the array. We don't need to keep hold of keys: the
+        # keychain already has them!
+        result_count = CoreFoundation.CFArrayGetCount(result_array)
+        for index in range(result_count):
+            item = CoreFoundation.CFArrayGetValueAtIndex(result_array, index)
+            item = ctypes.cast(item, CoreFoundation.CFTypeRef)
+
+            if _is_cert(item):
+                CoreFoundation.CFRetain(item)
+                certificates.append(item)
+            elif _is_identity(item):
+                CoreFoundation.CFRetain(item)
+                identities.append(item)
+    finally:
+        if result_array:
+            CoreFoundation.CFRelease(result_array)
+
+        CoreFoundation.CFRelease(filedata)
+
+    return (identities, certificates)
+
+
+def _load_client_cert_chain(keychain, *paths):
+    """
+    Load certificates and maybe keys from a number of files. Has the end goal
+    of returning a CFArray containing one SecIdentityRef, and then zero or more
+    SecCertificateRef objects, suitable for use as a client certificate trust
+    chain.
+    """
+    # Ok, the strategy.
+    #
+    # This relies on knowing that macOS will not give you a SecIdentityRef
+    # unless you have imported a key into a keychain. This is a somewhat
+    # artificial limitation of macOS (for example, it doesn't necessarily
+    # affect iOS), but there is nothing inside Security.framework that lets you
+    # get a SecIdentityRef without having a key in a keychain.
+    #
+    # So the policy here is we take all the files and iterate them in order.
+    # Each one will use SecItemImport to have one or more objects loaded from
+    # it. We will also point at a keychain that macOS can use to work with the
+    # private key.
+    #
+    # Once we have all the objects, we'll check what we actually have. If we
+    # already have a SecIdentityRef in hand, fab: we'll use that. Otherwise,
+    # we'll take the first certificate (which we assume to be our leaf) and
+    # ask the keychain to give us a SecIdentityRef with that cert's associated
+    # key.
+    #
+    # We'll then return a CFArray containing the trust chain: one
+    # SecIdentityRef and then zero-or-more SecCertificateRef objects. The
+    # responsibility for freeing this CFArray will be with the caller. This
+    # CFArray must remain alive for the entire connection, so in practice it
+    # will be stored with a single SSLSocket, along with the reference to the
+    # keychain.
+    certificates = []
+    identities = []
+
+    # Filter out bad paths.
+    paths = (path for path in paths if path)
+
+    try:
+        for file_path in paths:
+            new_identities, new_certs = _load_items_from_file(keychain, file_path)
+            identities.extend(new_identities)
+            certificates.extend(new_certs)
+
+        # Ok, we have everything. The question is: do we have an identity? If
+        # not, we want to grab one from the first cert we have.
+        if not identities:
+            new_identity = Security.SecIdentityRef()
+            status = Security.SecIdentityCreateWithCertificate(
+                keychain, certificates[0], ctypes.byref(new_identity)
+            )
+            _assert_no_error(status)
+            identities.append(new_identity)
+
+            # We now want to release the original certificate, as we no longer
+            # need it.
+            CoreFoundation.CFRelease(certificates.pop(0))
+
+        # We now need to build a new CFArray that holds the trust chain.
+        trust_chain = CoreFoundation.CFArrayCreateMutable(
+            CoreFoundation.kCFAllocatorDefault,
+            0,
+            ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks),
+        )
+        for item in itertools.chain(identities, certificates):
+            # ArrayAppendValue does a CFRetain on the item. That's fine,
+            # because the finally block will release our other refs to them.
+            CoreFoundation.CFArrayAppendValue(trust_chain, item)
+
+        return trust_chain
+    finally:
+        for obj in itertools.chain(identities, certificates):
+            CoreFoundation.CFRelease(obj)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/appengine.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/appengine.py
new file mode 100644
index 0000000..d09d2be
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/appengine.py
@@ -0,0 +1,314 @@
+"""
+This module provides a pool manager that uses Google App Engine's
+`URLFetch Service <https://cloud.google.com/appengine/docs/python/urlfetch>`_.
+
+Example usage::
+
+    from pip._vendor.urllib3 import PoolManager
+    from pip._vendor.urllib3.contrib.appengine import AppEngineManager, is_appengine_sandbox
+
+    if is_appengine_sandbox():
+        # AppEngineManager uses AppEngine's URLFetch API behind the scenes
+        http = AppEngineManager()
+    else:
+        # PoolManager uses a socket-level API behind the scenes
+        http = PoolManager()
+
+    r = http.request('GET', 'https://google.com/')
+
+There are `limitations <https://cloud.google.com/appengine/docs/python/\
+urlfetch/#Python_Quotas_and_limits>`_ to the URLFetch service and it may not be
+the best choice for your application. There are three options for using
+urllib3 on Google App Engine:
+
+1. You can use :class:`AppEngineManager` with URLFetch. URLFetch is
+   cost-effective in many circumstances as long as your usage is within the
+   limitations.
+2. You can use a normal :class:`~urllib3.PoolManager` by enabling sockets.
+   Sockets also have `limitations and restrictions
+   <https://cloud.google.com/appengine/docs/python/sockets/\
+   #limitations-and-restrictions>`_ and have a lower free quota than URLFetch.
+   To use sockets, be sure to specify the following in your ``app.yaml``::
+
+        env_variables:
+            GAE_USE_SOCKETS_HTTPLIB : 'true'
+
+3. If you are using `App Engine Flexible
+<https://cloud.google.com/appengine/docs/flexible/>`_, you can use the standard
+:class:`PoolManager` without any configuration or special environment variables.
+"""
+
+from __future__ import absolute_import
+import io
+import logging
+import warnings
+from ..packages.six.moves.urllib.parse import urljoin
+
+from ..exceptions import (
+    HTTPError,
+    HTTPWarning,
+    MaxRetryError,
+    ProtocolError,
+    TimeoutError,
+    SSLError,
+)
+
+from ..request import RequestMethods
+from ..response import HTTPResponse
+from ..util.timeout import Timeout
+from ..util.retry import Retry
+from . import _appengine_environ
+
+try:
+    from google.appengine.api import urlfetch
+except ImportError:
+    urlfetch = None
+
+
+log = logging.getLogger(__name__)
+
+
+class AppEnginePlatformWarning(HTTPWarning):
+    pass
+
+
+class AppEnginePlatformError(HTTPError):
+    pass
+
+
+class AppEngineManager(RequestMethods):
+    """
+    Connection manager for Google App Engine sandbox applications.
+
+    This manager uses the URLFetch service directly instead of using the
+    emulated httplib, and is subject to URLFetch limitations as described in
+    the App Engine documentation `here
+    <https://cloud.google.com/appengine/docs/python/urlfetch>`_.
+
+    Notably it will raise an :class:`AppEnginePlatformError` if:
+        * URLFetch is not available.
+        * If you attempt to use this on App Engine Flexible, as full socket
+          support is available.
+        * If a request size is more than 10 megabytes.
+        * If a response size is more than 32 megabtyes.
+        * If you use an unsupported request method such as OPTIONS.
+
+    Beyond those cases, it will raise normal urllib3 errors.
+    """
+
+    def __init__(
+        self,
+        headers=None,
+        retries=None,
+        validate_certificate=True,
+        urlfetch_retries=True,
+    ):
+        if not urlfetch:
+            raise AppEnginePlatformError(
+                "URLFetch is not available in this environment."
+            )
+
+        warnings.warn(
+            "urllib3 is using URLFetch on Google App Engine sandbox instead "
+            "of sockets. To use sockets directly instead of URLFetch see "
+            "https://urllib3.readthedocs.io/en/latest/reference/urllib3.contrib.html.",
+            AppEnginePlatformWarning,
+        )
+
+        RequestMethods.__init__(self, headers)
+        self.validate_certificate = validate_certificate
+        self.urlfetch_retries = urlfetch_retries
+
+        self.retries = retries or Retry.DEFAULT
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        # Return False to re-raise any potential exceptions
+        return False
+
+    def urlopen(
+        self,
+        method,
+        url,
+        body=None,
+        headers=None,
+        retries=None,
+        redirect=True,
+        timeout=Timeout.DEFAULT_TIMEOUT,
+        **response_kw
+    ):
+
+        retries = self._get_retries(retries, redirect)
+
+        try:
+            follow_redirects = redirect and retries.redirect != 0 and retries.total
+            response = urlfetch.fetch(
+                url,
+                payload=body,
+                method=method,
+                headers=headers or {},
+                allow_truncated=False,
+                follow_redirects=self.urlfetch_retries and follow_redirects,
+                deadline=self._get_absolute_timeout(timeout),
+                validate_certificate=self.validate_certificate,
+            )
+        except urlfetch.DeadlineExceededError as e:
+            raise TimeoutError(self, e)
+
+        except urlfetch.InvalidURLError as e:
+            if "too large" in str(e):
+                raise AppEnginePlatformError(
+                    "URLFetch request too large, URLFetch only "
+                    "supports requests up to 10mb in size.",
+                    e,
+                )
+            raise ProtocolError(e)
+
+        except urlfetch.DownloadError as e:
+            if "Too many redirects" in str(e):
+                raise MaxRetryError(self, url, reason=e)
+            raise ProtocolError(e)
+
+        except urlfetch.ResponseTooLargeError as e:
+            raise AppEnginePlatformError(
+                "URLFetch response too large, URLFetch only supports"
+                "responses up to 32mb in size.",
+                e,
+            )
+
+        except urlfetch.SSLCertificateError as e:
+            raise SSLError(e)
+
+        except urlfetch.InvalidMethodError as e:
+            raise AppEnginePlatformError(
+                "URLFetch does not support method: %s" % method, e
+            )
+
+        http_response = self._urlfetch_response_to_http_response(
+            response, retries=retries, **response_kw
+        )
+
+        # Handle redirect?
+        redirect_location = redirect and http_response.get_redirect_location()
+        if redirect_location:
+            # Check for redirect response
+            if self.urlfetch_retries and retries.raise_on_redirect:
+                raise MaxRetryError(self, url, "too many redirects")
+            else:
+                if http_response.status == 303:
+                    method = "GET"
+
+                try:
+                    retries = retries.increment(
+                        method, url, response=http_response, _pool=self
+                    )
+                except MaxRetryError:
+                    if retries.raise_on_redirect:
+                        raise MaxRetryError(self, url, "too many redirects")
+                    return http_response
+
+                retries.sleep_for_retry(http_response)
+                log.debug("Redirecting %s -> %s", url, redirect_location)
+                redirect_url = urljoin(url, redirect_location)
+                return self.urlopen(
+                    method,
+                    redirect_url,
+                    body,
+                    headers,
+                    retries=retries,
+                    redirect=redirect,
+                    timeout=timeout,
+                    **response_kw
+                )
+
+        # Check if we should retry the HTTP response.
+        has_retry_after = bool(http_response.getheader("Retry-After"))
+        if retries.is_retry(method, http_response.status, has_retry_after):
+            retries = retries.increment(method, url, response=http_response, _pool=self)
+            log.debug("Retry: %s", url)
+            retries.sleep(http_response)
+            return self.urlopen(
+                method,
+                url,
+                body=body,
+                headers=headers,
+                retries=retries,
+                redirect=redirect,
+                timeout=timeout,
+                **response_kw
+            )
+
+        return http_response
+
+    def _urlfetch_response_to_http_response(self, urlfetch_resp, **response_kw):
+
+        if is_prod_appengine():
+            # Production GAE handles deflate encoding automatically, but does
+            # not remove the encoding header.
+            content_encoding = urlfetch_resp.headers.get("content-encoding")
+
+            if content_encoding == "deflate":
+                del urlfetch_resp.headers["content-encoding"]
+
+        transfer_encoding = urlfetch_resp.headers.get("transfer-encoding")
+        # We have a full response's content,
+        # so let's make sure we don't report ourselves as chunked data.
+        if transfer_encoding == "chunked":
+            encodings = transfer_encoding.split(",")
+            encodings.remove("chunked")
+            urlfetch_resp.headers["transfer-encoding"] = ",".join(encodings)
+
+        original_response = HTTPResponse(
+            # In order for decoding to work, we must present the content as
+            # a file-like object.
+            body=io.BytesIO(urlfetch_resp.content),
+            msg=urlfetch_resp.header_msg,
+            headers=urlfetch_resp.headers,
+            status=urlfetch_resp.status_code,
+            **response_kw
+        )
+
+        return HTTPResponse(
+            body=io.BytesIO(urlfetch_resp.content),
+            headers=urlfetch_resp.headers,
+            status=urlfetch_resp.status_code,
+            original_response=original_response,
+            **response_kw
+        )
+
+    def _get_absolute_timeout(self, timeout):
+        if timeout is Timeout.DEFAULT_TIMEOUT:
+            return None  # Defer to URLFetch's default.
+        if isinstance(timeout, Timeout):
+            if timeout._read is not None or timeout._connect is not None:
+                warnings.warn(
+                    "URLFetch does not support granular timeout settings, "
+                    "reverting to total or default URLFetch timeout.",
+                    AppEnginePlatformWarning,
+                )
+            return timeout.total
+        return timeout
+
+    def _get_retries(self, retries, redirect):
+        if not isinstance(retries, Retry):
+            retries = Retry.from_int(retries, redirect=redirect, default=self.retries)
+
+        if retries.connect or retries.read or retries.redirect:
+            warnings.warn(
+                "URLFetch only supports total retries and does not "
+                "recognize connect, read, or redirect retry parameters.",
+                AppEnginePlatformWarning,
+            )
+
+        return retries
+
+
+# Alias methods from _appengine_environ to maintain public API interface.
+
+is_appengine = _appengine_environ.is_appengine
+is_appengine_sandbox = _appengine_environ.is_appengine_sandbox
+is_local_appengine = _appengine_environ.is_local_appengine
+is_prod_appengine = _appengine_environ.is_prod_appengine
+is_prod_appengine_mvms = _appengine_environ.is_prod_appengine_mvms
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/ntlmpool.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/ntlmpool.py
new file mode 100644
index 0000000..1fd242a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/ntlmpool.py
@@ -0,0 +1,121 @@
+"""
+NTLM authenticating pool, contributed by erikcederstran
+
+Issue #10, see: http://code.google.com/p/urllib3/issues/detail?id=10
+"""
+from __future__ import absolute_import
+
+from logging import getLogger
+from ntlm import ntlm
+
+from .. import HTTPSConnectionPool
+from ..packages.six.moves.http_client import HTTPSConnection
+
+
+log = getLogger(__name__)
+
+
+class NTLMConnectionPool(HTTPSConnectionPool):
+    """
+    Implements an NTLM authentication version of an urllib3 connection pool
+    """
+
+    scheme = "https"
+
+    def __init__(self, user, pw, authurl, *args, **kwargs):
+        """
+        authurl is a random URL on the server that is protected by NTLM.
+        user is the Windows user, probably in the DOMAIN\\username format.
+        pw is the password for the user.
+        """
+        super(NTLMConnectionPool, self).__init__(*args, **kwargs)
+        self.authurl = authurl
+        self.rawuser = user
+        user_parts = user.split("\\", 1)
+        self.domain = user_parts[0].upper()
+        self.user = user_parts[1]
+        self.pw = pw
+
+    def _new_conn(self):
+        # Performs the NTLM handshake that secures the connection. The socket
+        # must be kept open while requests are performed.
+        self.num_connections += 1
+        log.debug(
+            "Starting NTLM HTTPS connection no. %d: https://%s%s",
+            self.num_connections,
+            self.host,
+            self.authurl,
+        )
+
+        headers = {"Connection": "Keep-Alive"}
+        req_header = "Authorization"
+        resp_header = "www-authenticate"
+
+        conn = HTTPSConnection(host=self.host, port=self.port)
+
+        # Send negotiation message
+        headers[req_header] = "NTLM %s" % ntlm.create_NTLM_NEGOTIATE_MESSAGE(
+            self.rawuser
+        )
+        log.debug("Request headers: %s", headers)
+        conn.request("GET", self.authurl, None, headers)
+        res = conn.getresponse()
+        reshdr = dict(res.getheaders())
+        log.debug("Response status: %s %s", res.status, res.reason)
+        log.debug("Response headers: %s", reshdr)
+        log.debug("Response data: %s [...]", res.read(100))
+
+        # Remove the reference to the socket, so that it can not be closed by
+        # the response object (we want to keep the socket open)
+        res.fp = None
+
+        # Server should respond with a challenge message
+        auth_header_values = reshdr[resp_header].split(", ")
+        auth_header_value = None
+        for s in auth_header_values:
+            if s[:5] == "NTLM ":
+                auth_header_value = s[5:]
+        if auth_header_value is None:
+            raise Exception(
+                "Unexpected %s response header: %s" % (resp_header, reshdr[resp_header])
+            )
+
+        # Send authentication message
+        ServerChallenge, NegotiateFlags = ntlm.parse_NTLM_CHALLENGE_MESSAGE(
+            auth_header_value
+        )
+        auth_msg = ntlm.create_NTLM_AUTHENTICATE_MESSAGE(
+            ServerChallenge, self.user, self.domain, self.pw, NegotiateFlags
+        )
+        headers[req_header] = "NTLM %s" % auth_msg
+        log.debug("Request headers: %s", headers)
+        conn.request("GET", self.authurl, None, headers)
+        res = conn.getresponse()
+        log.debug("Response status: %s %s", res.status, res.reason)
+        log.debug("Response headers: %s", dict(res.getheaders()))
+        log.debug("Response data: %s [...]", res.read()[:100])
+        if res.status != 200:
+            if res.status == 401:
+                raise Exception("Server rejected request: wrong username or password")
+            raise Exception("Wrong server response: %s %s" % (res.status, res.reason))
+
+        res.fp = None
+        log.debug("Connection established")
+        return conn
+
+    def urlopen(
+        self,
+        method,
+        url,
+        body=None,
+        headers=None,
+        retries=3,
+        redirect=True,
+        assert_same_host=True,
+    ):
+        if headers is None:
+            headers = {}
+        headers["Connection"] = "Keep-Alive"
+        return super(NTLMConnectionPool, self).urlopen(
+            method, url, body, headers, retries, redirect, assert_same_host
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py
new file mode 100644
index 0000000..d8fe062
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py
@@ -0,0 +1,501 @@
+"""
+SSL with SNI_-support for Python 2. Follow these instructions if you would
+like to verify SSL certificates in Python 2. Note, the default libraries do
+*not* do certificate checking; you need to do additional work to validate
+certificates yourself.
+
+This needs the following packages installed:
+
+* pyOpenSSL (tested with 16.0.0)
+* cryptography (minimum 1.3.4, from pyopenssl)
+* idna (minimum 2.0, from cryptography)
+
+However, pyopenssl depends on cryptography, which depends on idna, so while we
+use all three directly here we end up having relatively few packages required.
+
+You can install them with the following command:
+
+    pip install pyopenssl cryptography idna
+
+To activate certificate checking, call
+:func:`~urllib3.contrib.pyopenssl.inject_into_urllib3` from your Python code
+before you begin making HTTP requests. This can be done in a ``sitecustomize``
+module, or at any other time before your application begins using ``urllib3``,
+like this::
+
+    try:
+        import urllib3.contrib.pyopenssl
+        urllib3.contrib.pyopenssl.inject_into_urllib3()
+    except ImportError:
+        pass
+
+Now you can use :mod:`urllib3` as you normally would, and it will support SNI
+when the required modules are installed.
+
+Activating this module also has the positive side effect of disabling SSL/TLS
+compression in Python 2 (see `CRIME attack`_).
+
+If you want to configure the default list of supported cipher suites, you can
+set the ``urllib3.contrib.pyopenssl.DEFAULT_SSL_CIPHER_LIST`` variable.
+
+.. _sni: https://en.wikipedia.org/wiki/Server_Name_Indication
+.. _crime attack: https://en.wikipedia.org/wiki/CRIME_(security_exploit)
+"""
+from __future__ import absolute_import
+
+import OpenSSL.SSL
+from cryptography import x509
+from cryptography.hazmat.backends.openssl import backend as openssl_backend
+from cryptography.hazmat.backends.openssl.x509 import _Certificate
+
+try:
+    from cryptography.x509 import UnsupportedExtension
+except ImportError:
+    # UnsupportedExtension is gone in cryptography >= 2.1.0
+    class UnsupportedExtension(Exception):
+        pass
+
+
+from socket import timeout, error as SocketError
+from io import BytesIO
+
+try:  # Platform-specific: Python 2
+    from socket import _fileobject
+except ImportError:  # Platform-specific: Python 3
+    _fileobject = None
+    from ..packages.backports.makefile import backport_makefile
+
+import logging
+import ssl
+from ..packages import six
+import sys
+
+from .. import util
+
+
+__all__ = ["inject_into_urllib3", "extract_from_urllib3"]
+
+# SNI always works.
+HAS_SNI = True
+
+# Map from urllib3 to PyOpenSSL compatible parameter-values.
+_openssl_versions = {
+    util.PROTOCOL_TLS: OpenSSL.SSL.SSLv23_METHOD,
+    ssl.PROTOCOL_TLSv1: OpenSSL.SSL.TLSv1_METHOD,
+}
+
+if hasattr(ssl, "PROTOCOL_SSLv3") and hasattr(OpenSSL.SSL, "SSLv3_METHOD"):
+    _openssl_versions[ssl.PROTOCOL_SSLv3] = OpenSSL.SSL.SSLv3_METHOD
+
+if hasattr(ssl, "PROTOCOL_TLSv1_1") and hasattr(OpenSSL.SSL, "TLSv1_1_METHOD"):
+    _openssl_versions[ssl.PROTOCOL_TLSv1_1] = OpenSSL.SSL.TLSv1_1_METHOD
+
+if hasattr(ssl, "PROTOCOL_TLSv1_2") and hasattr(OpenSSL.SSL, "TLSv1_2_METHOD"):
+    _openssl_versions[ssl.PROTOCOL_TLSv1_2] = OpenSSL.SSL.TLSv1_2_METHOD
+
+
+_stdlib_to_openssl_verify = {
+    ssl.CERT_NONE: OpenSSL.SSL.VERIFY_NONE,
+    ssl.CERT_OPTIONAL: OpenSSL.SSL.VERIFY_PEER,
+    ssl.CERT_REQUIRED: OpenSSL.SSL.VERIFY_PEER
+    + OpenSSL.SSL.VERIFY_FAIL_IF_NO_PEER_CERT,
+}
+_openssl_to_stdlib_verify = dict((v, k) for k, v in _stdlib_to_openssl_verify.items())
+
+# OpenSSL will only write 16K at a time
+SSL_WRITE_BLOCKSIZE = 16384
+
+orig_util_HAS_SNI = util.HAS_SNI
+orig_util_SSLContext = util.ssl_.SSLContext
+
+
+log = logging.getLogger(__name__)
+
+
+def inject_into_urllib3():
+    "Monkey-patch urllib3 with PyOpenSSL-backed SSL-support."
+
+    _validate_dependencies_met()
+
+    util.SSLContext = PyOpenSSLContext
+    util.ssl_.SSLContext = PyOpenSSLContext
+    util.HAS_SNI = HAS_SNI
+    util.ssl_.HAS_SNI = HAS_SNI
+    util.IS_PYOPENSSL = True
+    util.ssl_.IS_PYOPENSSL = True
+
+
+def extract_from_urllib3():
+    "Undo monkey-patching by :func:`inject_into_urllib3`."
+
+    util.SSLContext = orig_util_SSLContext
+    util.ssl_.SSLContext = orig_util_SSLContext
+    util.HAS_SNI = orig_util_HAS_SNI
+    util.ssl_.HAS_SNI = orig_util_HAS_SNI
+    util.IS_PYOPENSSL = False
+    util.ssl_.IS_PYOPENSSL = False
+
+
+def _validate_dependencies_met():
+    """
+    Verifies that PyOpenSSL's package-level dependencies have been met.
+    Throws `ImportError` if they are not met.
+    """
+    # Method added in `cryptography==1.1`; not available in older versions
+    from cryptography.x509.extensions import Extensions
+
+    if getattr(Extensions, "get_extension_for_class", None) is None:
+        raise ImportError(
+            "'cryptography' module missing required functionality.  "
+            "Try upgrading to v1.3.4 or newer."
+        )
+
+    # pyOpenSSL 0.14 and above use cryptography for OpenSSL bindings. The _x509
+    # attribute is only present on those versions.
+    from OpenSSL.crypto import X509
+
+    x509 = X509()
+    if getattr(x509, "_x509", None) is None:
+        raise ImportError(
+            "'pyOpenSSL' module missing required functionality. "
+            "Try upgrading to v0.14 or newer."
+        )
+
+
+def _dnsname_to_stdlib(name):
+    """
+    Converts a dNSName SubjectAlternativeName field to the form used by the
+    standard library on the given Python version.
+
+    Cryptography produces a dNSName as a unicode string that was idna-decoded
+    from ASCII bytes. We need to idna-encode that string to get it back, and
+    then on Python 3 we also need to convert to unicode via UTF-8 (the stdlib
+    uses PyUnicode_FromStringAndSize on it, which decodes via UTF-8).
+
+    If the name cannot be idna-encoded then we return None signalling that
+    the name given should be skipped.
+    """
+
+    def idna_encode(name):
+        """
+        Borrowed wholesale from the Python Cryptography Project. It turns out
+        that we can't just safely call `idna.encode`: it can explode for
+        wildcard names. This avoids that problem.
+        """
+        from pip._vendor import idna
+
+        try:
+            for prefix in [u"*.", u"."]:
+                if name.startswith(prefix):
+                    name = name[len(prefix) :]
+                    return prefix.encode("ascii") + idna.encode(name)
+            return idna.encode(name)
+        except idna.core.IDNAError:
+            return None
+
+    # Don't send IPv6 addresses through the IDNA encoder.
+    if ":" in name:
+        return name
+
+    name = idna_encode(name)
+    if name is None:
+        return None
+    elif sys.version_info >= (3, 0):
+        name = name.decode("utf-8")
+    return name
+
+
+def get_subj_alt_name(peer_cert):
+    """
+    Given an PyOpenSSL certificate, provides all the subject alternative names.
+    """
+    # Pass the cert to cryptography, which has much better APIs for this.
+    if hasattr(peer_cert, "to_cryptography"):
+        cert = peer_cert.to_cryptography()
+    else:
+        # This is technically using private APIs, but should work across all
+        # relevant versions before PyOpenSSL got a proper API for this.
+        cert = _Certificate(openssl_backend, peer_cert._x509)
+
+    # We want to find the SAN extension. Ask Cryptography to locate it (it's
+    # faster than looping in Python)
+    try:
+        ext = cert.extensions.get_extension_for_class(x509.SubjectAlternativeName).value
+    except x509.ExtensionNotFound:
+        # No such extension, return the empty list.
+        return []
+    except (
+        x509.DuplicateExtension,
+        UnsupportedExtension,
+        x509.UnsupportedGeneralNameType,
+        UnicodeError,
+    ) as e:
+        # A problem has been found with the quality of the certificate. Assume
+        # no SAN field is present.
+        log.warning(
+            "A problem was encountered with the certificate that prevented "
+            "urllib3 from finding the SubjectAlternativeName field. This can "
+            "affect certificate validation. The error was %s",
+            e,
+        )
+        return []
+
+    # We want to return dNSName and iPAddress fields. We need to cast the IPs
+    # back to strings because the match_hostname function wants them as
+    # strings.
+    # Sadly the DNS names need to be idna encoded and then, on Python 3, UTF-8
+    # decoded. This is pretty frustrating, but that's what the standard library
+    # does with certificates, and so we need to attempt to do the same.
+    # We also want to skip over names which cannot be idna encoded.
+    names = [
+        ("DNS", name)
+        for name in map(_dnsname_to_stdlib, ext.get_values_for_type(x509.DNSName))
+        if name is not None
+    ]
+    names.extend(
+        ("IP Address", str(name)) for name in ext.get_values_for_type(x509.IPAddress)
+    )
+
+    return names
+
+
+class WrappedSocket(object):
+    """API-compatibility wrapper for Python OpenSSL's Connection-class.
+
+    Note: _makefile_refs, _drop() and _reuse() are needed for the garbage
+    collector of pypy.
+    """
+
+    def __init__(self, connection, socket, suppress_ragged_eofs=True):
+        self.connection = connection
+        self.socket = socket
+        self.suppress_ragged_eofs = suppress_ragged_eofs
+        self._makefile_refs = 0
+        self._closed = False
+
+    def fileno(self):
+        return self.socket.fileno()
+
+    # Copy-pasted from Python 3.5 source code
+    def _decref_socketios(self):
+        if self._makefile_refs > 0:
+            self._makefile_refs -= 1
+        if self._closed:
+            self.close()
+
+    def recv(self, *args, **kwargs):
+        try:
+            data = self.connection.recv(*args, **kwargs)
+        except OpenSSL.SSL.SysCallError as e:
+            if self.suppress_ragged_eofs and e.args == (-1, "Unexpected EOF"):
+                return b""
+            else:
+                raise SocketError(str(e))
+        except OpenSSL.SSL.ZeroReturnError:
+            if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
+                return b""
+            else:
+                raise
+        except OpenSSL.SSL.WantReadError:
+            if not util.wait_for_read(self.socket, self.socket.gettimeout()):
+                raise timeout("The read operation timed out")
+            else:
+                return self.recv(*args, **kwargs)
+
+        # TLS 1.3 post-handshake authentication
+        except OpenSSL.SSL.Error as e:
+            raise ssl.SSLError("read error: %r" % e)
+        else:
+            return data
+
+    def recv_into(self, *args, **kwargs):
+        try:
+            return self.connection.recv_into(*args, **kwargs)
+        except OpenSSL.SSL.SysCallError as e:
+            if self.suppress_ragged_eofs and e.args == (-1, "Unexpected EOF"):
+                return 0
+            else:
+                raise SocketError(str(e))
+        except OpenSSL.SSL.ZeroReturnError:
+            if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
+                return 0
+            else:
+                raise
+        except OpenSSL.SSL.WantReadError:
+            if not util.wait_for_read(self.socket, self.socket.gettimeout()):
+                raise timeout("The read operation timed out")
+            else:
+                return self.recv_into(*args, **kwargs)
+
+        # TLS 1.3 post-handshake authentication
+        except OpenSSL.SSL.Error as e:
+            raise ssl.SSLError("read error: %r" % e)
+
+    def settimeout(self, timeout):
+        return self.socket.settimeout(timeout)
+
+    def _send_until_done(self, data):
+        while True:
+            try:
+                return self.connection.send(data)
+            except OpenSSL.SSL.WantWriteError:
+                if not util.wait_for_write(self.socket, self.socket.gettimeout()):
+                    raise timeout()
+                continue
+            except OpenSSL.SSL.SysCallError as e:
+                raise SocketError(str(e))
+
+    def sendall(self, data):
+        total_sent = 0
+        while total_sent < len(data):
+            sent = self._send_until_done(
+                data[total_sent : total_sent + SSL_WRITE_BLOCKSIZE]
+            )
+            total_sent += sent
+
+    def shutdown(self):
+        # FIXME rethrow compatible exceptions should we ever use this
+        self.connection.shutdown()
+
+    def close(self):
+        if self._makefile_refs < 1:
+            try:
+                self._closed = True
+                return self.connection.close()
+            except OpenSSL.SSL.Error:
+                return
+        else:
+            self._makefile_refs -= 1
+
+    def getpeercert(self, binary_form=False):
+        x509 = self.connection.get_peer_certificate()
+
+        if not x509:
+            return x509
+
+        if binary_form:
+            return OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_ASN1, x509)
+
+        return {
+            "subject": ((("commonName", x509.get_subject().CN),),),
+            "subjectAltName": get_subj_alt_name(x509),
+        }
+
+    def version(self):
+        return self.connection.get_protocol_version_name()
+
+    def _reuse(self):
+        self._makefile_refs += 1
+
+    def _drop(self):
+        if self._makefile_refs < 1:
+            self.close()
+        else:
+            self._makefile_refs -= 1
+
+
+if _fileobject:  # Platform-specific: Python 2
+
+    def makefile(self, mode, bufsize=-1):
+        self._makefile_refs += 1
+        return _fileobject(self, mode, bufsize, close=True)
+
+
+else:  # Platform-specific: Python 3
+    makefile = backport_makefile
+
+WrappedSocket.makefile = makefile
+
+
+class PyOpenSSLContext(object):
+    """
+    I am a wrapper class for the PyOpenSSL ``Context`` object. I am responsible
+    for translating the interface of the standard library ``SSLContext`` object
+    to calls into PyOpenSSL.
+    """
+
+    def __init__(self, protocol):
+        self.protocol = _openssl_versions[protocol]
+        self._ctx = OpenSSL.SSL.Context(self.protocol)
+        self._options = 0
+        self.check_hostname = False
+
+    @property
+    def options(self):
+        return self._options
+
+    @options.setter
+    def options(self, value):
+        self._options = value
+        self._ctx.set_options(value)
+
+    @property
+    def verify_mode(self):
+        return _openssl_to_stdlib_verify[self._ctx.get_verify_mode()]
+
+    @verify_mode.setter
+    def verify_mode(self, value):
+        self._ctx.set_verify(_stdlib_to_openssl_verify[value], _verify_callback)
+
+    def set_default_verify_paths(self):
+        self._ctx.set_default_verify_paths()
+
+    def set_ciphers(self, ciphers):
+        if isinstance(ciphers, six.text_type):
+            ciphers = ciphers.encode("utf-8")
+        self._ctx.set_cipher_list(ciphers)
+
+    def load_verify_locations(self, cafile=None, capath=None, cadata=None):
+        if cafile is not None:
+            cafile = cafile.encode("utf-8")
+        if capath is not None:
+            capath = capath.encode("utf-8")
+        try:
+            self._ctx.load_verify_locations(cafile, capath)
+            if cadata is not None:
+                self._ctx.load_verify_locations(BytesIO(cadata))
+        except OpenSSL.SSL.Error as e:
+            raise ssl.SSLError("unable to load trusted certificates: %r" % e)
+
+    def load_cert_chain(self, certfile, keyfile=None, password=None):
+        self._ctx.use_certificate_chain_file(certfile)
+        if password is not None:
+            if not isinstance(password, six.binary_type):
+                password = password.encode("utf-8")
+            self._ctx.set_passwd_cb(lambda *_: password)
+        self._ctx.use_privatekey_file(keyfile or certfile)
+
+    def wrap_socket(
+        self,
+        sock,
+        server_side=False,
+        do_handshake_on_connect=True,
+        suppress_ragged_eofs=True,
+        server_hostname=None,
+    ):
+        cnx = OpenSSL.SSL.Connection(self._ctx, sock)
+
+        if isinstance(server_hostname, six.text_type):  # Platform-specific: Python 3
+            server_hostname = server_hostname.encode("utf-8")
+
+        if server_hostname is not None:
+            cnx.set_tlsext_host_name(server_hostname)
+
+        cnx.set_connect_state()
+
+        while True:
+            try:
+                cnx.do_handshake()
+            except OpenSSL.SSL.WantReadError:
+                if not util.wait_for_read(sock, sock.gettimeout()):
+                    raise timeout("select timed out")
+                continue
+            except OpenSSL.SSL.Error as e:
+                raise ssl.SSLError("bad handshake: %r" % e)
+            break
+
+        return WrappedSocket(cnx, sock)
+
+
+def _verify_callback(cnx, x509, err_no, err_depth, return_code):
+    return err_no == 0
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/securetransport.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/securetransport.py
new file mode 100644
index 0000000..a6b7e94
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/securetransport.py
@@ -0,0 +1,864 @@
+"""
+SecureTranport support for urllib3 via ctypes.
+
+This makes platform-native TLS available to urllib3 users on macOS without the
+use of a compiler. This is an important feature because the Python Package
+Index is moving to become a TLSv1.2-or-higher server, and the default OpenSSL
+that ships with macOS is not capable of doing TLSv1.2. The only way to resolve
+this is to give macOS users an alternative solution to the problem, and that
+solution is to use SecureTransport.
+
+We use ctypes here because this solution must not require a compiler. That's
+because pip is not allowed to require a compiler either.
+
+This is not intended to be a seriously long-term solution to this problem.
+The hope is that PEP 543 will eventually solve this issue for us, at which
+point we can retire this contrib module. But in the short term, we need to
+solve the impending tire fire that is Python on Mac without this kind of
+contrib module. So...here we are.
+
+To use this module, simply import and inject it::
+
+    import urllib3.contrib.securetransport
+    urllib3.contrib.securetransport.inject_into_urllib3()
+
+Happy TLSing!
+
+This code is a bastardised version of the code found in Will Bond's oscrypto
+library. An enormous debt is owed to him for blazing this trail for us. For
+that reason, this code should be considered to be covered both by urllib3's
+license and by oscrypto's:
+
+    Copyright (c) 2015-2016 Will Bond <will@wbond.net>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+"""
+from __future__ import absolute_import
+
+import contextlib
+import ctypes
+import errno
+import os.path
+import shutil
+import socket
+import ssl
+import threading
+import weakref
+
+from .. import util
+from ._securetransport.bindings import Security, SecurityConst, CoreFoundation
+from ._securetransport.low_level import (
+    _assert_no_error,
+    _cert_array_from_pem,
+    _temporary_keychain,
+    _load_client_cert_chain,
+)
+
+try:  # Platform-specific: Python 2
+    from socket import _fileobject
+except ImportError:  # Platform-specific: Python 3
+    _fileobject = None
+    from ..packages.backports.makefile import backport_makefile
+
+__all__ = ["inject_into_urllib3", "extract_from_urllib3"]
+
+# SNI always works
+HAS_SNI = True
+
+orig_util_HAS_SNI = util.HAS_SNI
+orig_util_SSLContext = util.ssl_.SSLContext
+
+# This dictionary is used by the read callback to obtain a handle to the
+# calling wrapped socket. This is a pretty silly approach, but for now it'll
+# do. I feel like I should be able to smuggle a handle to the wrapped socket
+# directly in the SSLConnectionRef, but for now this approach will work I
+# guess.
+#
+# We need to lock around this structure for inserts, but we don't do it for
+# reads/writes in the callbacks. The reasoning here goes as follows:
+#
+#    1. It is not possible to call into the callbacks before the dictionary is
+#       populated, so once in the callback the id must be in the dictionary.
+#    2. The callbacks don't mutate the dictionary, they only read from it, and
+#       so cannot conflict with any of the insertions.
+#
+# This is good: if we had to lock in the callbacks we'd drastically slow down
+# the performance of this code.
+_connection_refs = weakref.WeakValueDictionary()
+_connection_ref_lock = threading.Lock()
+
+# Limit writes to 16kB. This is OpenSSL's limit, but we'll cargo-cult it over
+# for no better reason than we need *a* limit, and this one is right there.
+SSL_WRITE_BLOCKSIZE = 16384
+
+# This is our equivalent of util.ssl_.DEFAULT_CIPHERS, but expanded out to
+# individual cipher suites. We need to do this because this is how
+# SecureTransport wants them.
+CIPHER_SUITES = [
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
+    SecurityConst.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
+    SecurityConst.TLS_AES_256_GCM_SHA384,
+    SecurityConst.TLS_AES_128_GCM_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_RSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_AES_128_CCM_8_SHA256,
+    SecurityConst.TLS_AES_128_CCM_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_256_CBC_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_RSA_WITH_AES_128_CBC_SHA,
+]
+
+# Basically this is simple: for PROTOCOL_SSLv23 we turn it into a low of
+# TLSv1 and a high of TLSv1.2. For everything else, we pin to that version.
+# TLSv1 to 1.2 are supported on macOS 10.8+
+_protocol_to_min_max = {
+    util.PROTOCOL_TLS: (SecurityConst.kTLSProtocol1, SecurityConst.kTLSProtocol12)
+}
+
+if hasattr(ssl, "PROTOCOL_SSLv2"):
+    _protocol_to_min_max[ssl.PROTOCOL_SSLv2] = (
+        SecurityConst.kSSLProtocol2,
+        SecurityConst.kSSLProtocol2,
+    )
+if hasattr(ssl, "PROTOCOL_SSLv3"):
+    _protocol_to_min_max[ssl.PROTOCOL_SSLv3] = (
+        SecurityConst.kSSLProtocol3,
+        SecurityConst.kSSLProtocol3,
+    )
+if hasattr(ssl, "PROTOCOL_TLSv1"):
+    _protocol_to_min_max[ssl.PROTOCOL_TLSv1] = (
+        SecurityConst.kTLSProtocol1,
+        SecurityConst.kTLSProtocol1,
+    )
+if hasattr(ssl, "PROTOCOL_TLSv1_1"):
+    _protocol_to_min_max[ssl.PROTOCOL_TLSv1_1] = (
+        SecurityConst.kTLSProtocol11,
+        SecurityConst.kTLSProtocol11,
+    )
+if hasattr(ssl, "PROTOCOL_TLSv1_2"):
+    _protocol_to_min_max[ssl.PROTOCOL_TLSv1_2] = (
+        SecurityConst.kTLSProtocol12,
+        SecurityConst.kTLSProtocol12,
+    )
+
+
+def inject_into_urllib3():
+    """
+    Monkey-patch urllib3 with SecureTransport-backed SSL-support.
+    """
+    util.SSLContext = SecureTransportContext
+    util.ssl_.SSLContext = SecureTransportContext
+    util.HAS_SNI = HAS_SNI
+    util.ssl_.HAS_SNI = HAS_SNI
+    util.IS_SECURETRANSPORT = True
+    util.ssl_.IS_SECURETRANSPORT = True
+
+
+def extract_from_urllib3():
+    """
+    Undo monkey-patching by :func:`inject_into_urllib3`.
+    """
+    util.SSLContext = orig_util_SSLContext
+    util.ssl_.SSLContext = orig_util_SSLContext
+    util.HAS_SNI = orig_util_HAS_SNI
+    util.ssl_.HAS_SNI = orig_util_HAS_SNI
+    util.IS_SECURETRANSPORT = False
+    util.ssl_.IS_SECURETRANSPORT = False
+
+
+def _read_callback(connection_id, data_buffer, data_length_pointer):
+    """
+    SecureTransport read callback. This is called by ST to request that data
+    be returned from the socket.
+    """
+    wrapped_socket = None
+    try:
+        wrapped_socket = _connection_refs.get(connection_id)
+        if wrapped_socket is None:
+            return SecurityConst.errSSLInternal
+        base_socket = wrapped_socket.socket
+
+        requested_length = data_length_pointer[0]
+
+        timeout = wrapped_socket.gettimeout()
+        error = None
+        read_count = 0
+
+        try:
+            while read_count < requested_length:
+                if timeout is None or timeout >= 0:
+                    if not util.wait_for_read(base_socket, timeout):
+                        raise socket.error(errno.EAGAIN, "timed out")
+
+                remaining = requested_length - read_count
+                buffer = (ctypes.c_char * remaining).from_address(
+                    data_buffer + read_count
+                )
+                chunk_size = base_socket.recv_into(buffer, remaining)
+                read_count += chunk_size
+                if not chunk_size:
+                    if not read_count:
+                        return SecurityConst.errSSLClosedGraceful
+                    break
+        except (socket.error) as e:
+            error = e.errno
+
+            if error is not None and error != errno.EAGAIN:
+                data_length_pointer[0] = read_count
+                if error == errno.ECONNRESET or error == errno.EPIPE:
+                    return SecurityConst.errSSLClosedAbort
+                raise
+
+        data_length_pointer[0] = read_count
+
+        if read_count != requested_length:
+            return SecurityConst.errSSLWouldBlock
+
+        return 0
+    except Exception as e:
+        if wrapped_socket is not None:
+            wrapped_socket._exception = e
+        return SecurityConst.errSSLInternal
+
+
+def _write_callback(connection_id, data_buffer, data_length_pointer):
+    """
+    SecureTransport write callback. This is called by ST to request that data
+    actually be sent on the network.
+    """
+    wrapped_socket = None
+    try:
+        wrapped_socket = _connection_refs.get(connection_id)
+        if wrapped_socket is None:
+            return SecurityConst.errSSLInternal
+        base_socket = wrapped_socket.socket
+
+        bytes_to_write = data_length_pointer[0]
+        data = ctypes.string_at(data_buffer, bytes_to_write)
+
+        timeout = wrapped_socket.gettimeout()
+        error = None
+        sent = 0
+
+        try:
+            while sent < bytes_to_write:
+                if timeout is None or timeout >= 0:
+                    if not util.wait_for_write(base_socket, timeout):
+                        raise socket.error(errno.EAGAIN, "timed out")
+                chunk_sent = base_socket.send(data)
+                sent += chunk_sent
+
+                # This has some needless copying here, but I'm not sure there's
+                # much value in optimising this data path.
+                data = data[chunk_sent:]
+        except (socket.error) as e:
+            error = e.errno
+
+            if error is not None and error != errno.EAGAIN:
+                data_length_pointer[0] = sent
+                if error == errno.ECONNRESET or error == errno.EPIPE:
+                    return SecurityConst.errSSLClosedAbort
+                raise
+
+        data_length_pointer[0] = sent
+
+        if sent != bytes_to_write:
+            return SecurityConst.errSSLWouldBlock
+
+        return 0
+    except Exception as e:
+        if wrapped_socket is not None:
+            wrapped_socket._exception = e
+        return SecurityConst.errSSLInternal
+
+
+# We need to keep these two objects references alive: if they get GC'd while
+# in use then SecureTransport could attempt to call a function that is in freed
+# memory. That would be...uh...bad. Yeah, that's the word. Bad.
+_read_callback_pointer = Security.SSLReadFunc(_read_callback)
+_write_callback_pointer = Security.SSLWriteFunc(_write_callback)
+
+
+class WrappedSocket(object):
+    """
+    API-compatibility wrapper for Python's OpenSSL wrapped socket object.
+
+    Note: _makefile_refs, _drop(), and _reuse() are needed for the garbage
+    collector of PyPy.
+    """
+
+    def __init__(self, socket):
+        self.socket = socket
+        self.context = None
+        self._makefile_refs = 0
+        self._closed = False
+        self._exception = None
+        self._keychain = None
+        self._keychain_dir = None
+        self._client_cert_chain = None
+
+        # We save off the previously-configured timeout and then set it to
+        # zero. This is done because we use select and friends to handle the
+        # timeouts, but if we leave the timeout set on the lower socket then
+        # Python will "kindly" call select on that socket again for us. Avoid
+        # that by forcing the timeout to zero.
+        self._timeout = self.socket.gettimeout()
+        self.socket.settimeout(0)
+
+    @contextlib.contextmanager
+    def _raise_on_error(self):
+        """
+        A context manager that can be used to wrap calls that do I/O from
+        SecureTransport. If any of the I/O callbacks hit an exception, this
+        context manager will correctly propagate the exception after the fact.
+        This avoids silently swallowing those exceptions.
+
+        It also correctly forces the socket closed.
+        """
+        self._exception = None
+
+        # We explicitly don't catch around this yield because in the unlikely
+        # event that an exception was hit in the block we don't want to swallow
+        # it.
+        yield
+        if self._exception is not None:
+            exception, self._exception = self._exception, None
+            self.close()
+            raise exception
+
+    def _set_ciphers(self):
+        """
+        Sets up the allowed ciphers. By default this matches the set in
+        util.ssl_.DEFAULT_CIPHERS, at least as supported by macOS. This is done
+        custom and doesn't allow changing at this time, mostly because parsing
+        OpenSSL cipher strings is going to be a freaking nightmare.
+        """
+        ciphers = (Security.SSLCipherSuite * len(CIPHER_SUITES))(*CIPHER_SUITES)
+        result = Security.SSLSetEnabledCiphers(
+            self.context, ciphers, len(CIPHER_SUITES)
+        )
+        _assert_no_error(result)
+
+    def _custom_validate(self, verify, trust_bundle):
+        """
+        Called when we have set custom validation. We do this in two cases:
+        first, when cert validation is entirely disabled; and second, when
+        using a custom trust DB.
+        """
+        # If we disabled cert validation, just say: cool.
+        if not verify:
+            return
+
+        # We want data in memory, so load it up.
+        if os.path.isfile(trust_bundle):
+            with open(trust_bundle, "rb") as f:
+                trust_bundle = f.read()
+
+        cert_array = None
+        trust = Security.SecTrustRef()
+
+        try:
+            # Get a CFArray that contains the certs we want.
+            cert_array = _cert_array_from_pem(trust_bundle)
+
+            # Ok, now the hard part. We want to get the SecTrustRef that ST has
+            # created for this connection, shove our CAs into it, tell ST to
+            # ignore everything else it knows, and then ask if it can build a
+            # chain. This is a buuuunch of code.
+            result = Security.SSLCopyPeerTrust(self.context, ctypes.byref(trust))
+            _assert_no_error(result)
+            if not trust:
+                raise ssl.SSLError("Failed to copy trust reference")
+
+            result = Security.SecTrustSetAnchorCertificates(trust, cert_array)
+            _assert_no_error(result)
+
+            result = Security.SecTrustSetAnchorCertificatesOnly(trust, True)
+            _assert_no_error(result)
+
+            trust_result = Security.SecTrustResultType()
+            result = Security.SecTrustEvaluate(trust, ctypes.byref(trust_result))
+            _assert_no_error(result)
+        finally:
+            if trust:
+                CoreFoundation.CFRelease(trust)
+
+            if cert_array is not None:
+                CoreFoundation.CFRelease(cert_array)
+
+        # Ok, now we can look at what the result was.
+        successes = (
+            SecurityConst.kSecTrustResultUnspecified,
+            SecurityConst.kSecTrustResultProceed,
+        )
+        if trust_result.value not in successes:
+            raise ssl.SSLError(
+                "certificate verify failed, error code: %d" % trust_result.value
+            )
+
+    def handshake(
+        self,
+        server_hostname,
+        verify,
+        trust_bundle,
+        min_version,
+        max_version,
+        client_cert,
+        client_key,
+        client_key_passphrase,
+    ):
+        """
+        Actually performs the TLS handshake. This is run automatically by
+        wrapped socket, and shouldn't be needed in user code.
+        """
+        # First, we do the initial bits of connection setup. We need to create
+        # a context, set its I/O funcs, and set the connection reference.
+        self.context = Security.SSLCreateContext(
+            None, SecurityConst.kSSLClientSide, SecurityConst.kSSLStreamType
+        )
+        result = Security.SSLSetIOFuncs(
+            self.context, _read_callback_pointer, _write_callback_pointer
+        )
+        _assert_no_error(result)
+
+        # Here we need to compute the handle to use. We do this by taking the
+        # id of self modulo 2**31 - 1. If this is already in the dictionary, we
+        # just keep incrementing by one until we find a free space.
+        with _connection_ref_lock:
+            handle = id(self) % 2147483647
+            while handle in _connection_refs:
+                handle = (handle + 1) % 2147483647
+            _connection_refs[handle] = self
+
+        result = Security.SSLSetConnection(self.context, handle)
+        _assert_no_error(result)
+
+        # If we have a server hostname, we should set that too.
+        if server_hostname:
+            if not isinstance(server_hostname, bytes):
+                server_hostname = server_hostname.encode("utf-8")
+
+            result = Security.SSLSetPeerDomainName(
+                self.context, server_hostname, len(server_hostname)
+            )
+            _assert_no_error(result)
+
+        # Setup the ciphers.
+        self._set_ciphers()
+
+        # Set the minimum and maximum TLS versions.
+        result = Security.SSLSetProtocolVersionMin(self.context, min_version)
+        _assert_no_error(result)
+
+        result = Security.SSLSetProtocolVersionMax(self.context, max_version)
+        _assert_no_error(result)
+
+        # If there's a trust DB, we need to use it. We do that by telling
+        # SecureTransport to break on server auth. We also do that if we don't
+        # want to validate the certs at all: we just won't actually do any
+        # authing in that case.
+        if not verify or trust_bundle is not None:
+            result = Security.SSLSetSessionOption(
+                self.context, SecurityConst.kSSLSessionOptionBreakOnServerAuth, True
+            )
+            _assert_no_error(result)
+
+        # If there's a client cert, we need to use it.
+        if client_cert:
+            self._keychain, self._keychain_dir = _temporary_keychain()
+            self._client_cert_chain = _load_client_cert_chain(
+                self._keychain, client_cert, client_key
+            )
+            result = Security.SSLSetCertificate(self.context, self._client_cert_chain)
+            _assert_no_error(result)
+
+        while True:
+            with self._raise_on_error():
+                result = Security.SSLHandshake(self.context)
+
+                if result == SecurityConst.errSSLWouldBlock:
+                    raise socket.timeout("handshake timed out")
+                elif result == SecurityConst.errSSLServerAuthCompleted:
+                    self._custom_validate(verify, trust_bundle)
+                    continue
+                else:
+                    _assert_no_error(result)
+                    break
+
+    def fileno(self):
+        return self.socket.fileno()
+
+    # Copy-pasted from Python 3.5 source code
+    def _decref_socketios(self):
+        if self._makefile_refs > 0:
+            self._makefile_refs -= 1
+        if self._closed:
+            self.close()
+
+    def recv(self, bufsiz):
+        buffer = ctypes.create_string_buffer(bufsiz)
+        bytes_read = self.recv_into(buffer, bufsiz)
+        data = buffer[:bytes_read]
+        return data
+
+    def recv_into(self, buffer, nbytes=None):
+        # Read short on EOF.
+        if self._closed:
+            return 0
+
+        if nbytes is None:
+            nbytes = len(buffer)
+
+        buffer = (ctypes.c_char * nbytes).from_buffer(buffer)
+        processed_bytes = ctypes.c_size_t(0)
+
+        with self._raise_on_error():
+            result = Security.SSLRead(
+                self.context, buffer, nbytes, ctypes.byref(processed_bytes)
+            )
+
+        # There are some result codes that we want to treat as "not always
+        # errors". Specifically, those are errSSLWouldBlock,
+        # errSSLClosedGraceful, and errSSLClosedNoNotify.
+        if result == SecurityConst.errSSLWouldBlock:
+            # If we didn't process any bytes, then this was just a time out.
+            # However, we can get errSSLWouldBlock in situations when we *did*
+            # read some data, and in those cases we should just read "short"
+            # and return.
+            if processed_bytes.value == 0:
+                # Timed out, no data read.
+                raise socket.timeout("recv timed out")
+        elif result in (
+            SecurityConst.errSSLClosedGraceful,
+            SecurityConst.errSSLClosedNoNotify,
+        ):
+            # The remote peer has closed this connection. We should do so as
+            # well. Note that we don't actually return here because in
+            # principle this could actually be fired along with return data.
+            # It's unlikely though.
+            self.close()
+        else:
+            _assert_no_error(result)
+
+        # Ok, we read and probably succeeded. We should return whatever data
+        # was actually read.
+        return processed_bytes.value
+
+    def settimeout(self, timeout):
+        self._timeout = timeout
+
+    def gettimeout(self):
+        return self._timeout
+
+    def send(self, data):
+        processed_bytes = ctypes.c_size_t(0)
+
+        with self._raise_on_error():
+            result = Security.SSLWrite(
+                self.context, data, len(data), ctypes.byref(processed_bytes)
+            )
+
+        if result == SecurityConst.errSSLWouldBlock and processed_bytes.value == 0:
+            # Timed out
+            raise socket.timeout("send timed out")
+        else:
+            _assert_no_error(result)
+
+        # We sent, and probably succeeded. Tell them how much we sent.
+        return processed_bytes.value
+
+    def sendall(self, data):
+        total_sent = 0
+        while total_sent < len(data):
+            sent = self.send(data[total_sent : total_sent + SSL_WRITE_BLOCKSIZE])
+            total_sent += sent
+
+    def shutdown(self):
+        with self._raise_on_error():
+            Security.SSLClose(self.context)
+
+    def close(self):
+        # TODO: should I do clean shutdown here? Do I have to?
+        if self._makefile_refs < 1:
+            self._closed = True
+            if self.context:
+                CoreFoundation.CFRelease(self.context)
+                self.context = None
+            if self._client_cert_chain:
+                CoreFoundation.CFRelease(self._client_cert_chain)
+                self._client_cert_chain = None
+            if self._keychain:
+                Security.SecKeychainDelete(self._keychain)
+                CoreFoundation.CFRelease(self._keychain)
+                shutil.rmtree(self._keychain_dir)
+                self._keychain = self._keychain_dir = None
+            return self.socket.close()
+        else:
+            self._makefile_refs -= 1
+
+    def getpeercert(self, binary_form=False):
+        # Urgh, annoying.
+        #
+        # Here's how we do this:
+        #
+        # 1. Call SSLCopyPeerTrust to get hold of the trust object for this
+        #    connection.
+        # 2. Call SecTrustGetCertificateAtIndex for index 0 to get the leaf.
+        # 3. To get the CN, call SecCertificateCopyCommonName and process that
+        #    string so that it's of the appropriate type.
+        # 4. To get the SAN, we need to do something a bit more complex:
+        #    a. Call SecCertificateCopyValues to get the data, requesting
+        #       kSecOIDSubjectAltName.
+        #    b. Mess about with this dictionary to try to get the SANs out.
+        #
+        # This is gross. Really gross. It's going to be a few hundred LoC extra
+        # just to repeat something that SecureTransport can *already do*. So my
+        # operating assumption at this time is that what we want to do is
+        # instead to just flag to urllib3 that it shouldn't do its own hostname
+        # validation when using SecureTransport.
+        if not binary_form:
+            raise ValueError("SecureTransport only supports dumping binary certs")
+        trust = Security.SecTrustRef()
+        certdata = None
+        der_bytes = None
+
+        try:
+            # Grab the trust store.
+            result = Security.SSLCopyPeerTrust(self.context, ctypes.byref(trust))
+            _assert_no_error(result)
+            if not trust:
+                # Probably we haven't done the handshake yet. No biggie.
+                return None
+
+            cert_count = Security.SecTrustGetCertificateCount(trust)
+            if not cert_count:
+                # Also a case that might happen if we haven't handshaked.
+                # Handshook? Handshaken?
+                return None
+
+            leaf = Security.SecTrustGetCertificateAtIndex(trust, 0)
+            assert leaf
+
+            # Ok, now we want the DER bytes.
+            certdata = Security.SecCertificateCopyData(leaf)
+            assert certdata
+
+            data_length = CoreFoundation.CFDataGetLength(certdata)
+            data_buffer = CoreFoundation.CFDataGetBytePtr(certdata)
+            der_bytes = ctypes.string_at(data_buffer, data_length)
+        finally:
+            if certdata:
+                CoreFoundation.CFRelease(certdata)
+            if trust:
+                CoreFoundation.CFRelease(trust)
+
+        return der_bytes
+
+    def version(self):
+        protocol = Security.SSLProtocol()
+        result = Security.SSLGetNegotiatedProtocolVersion(
+            self.context, ctypes.byref(protocol)
+        )
+        _assert_no_error(result)
+        if protocol.value == SecurityConst.kTLSProtocol13:
+            raise ssl.SSLError("SecureTransport does not support TLS 1.3")
+        elif protocol.value == SecurityConst.kTLSProtocol12:
+            return "TLSv1.2"
+        elif protocol.value == SecurityConst.kTLSProtocol11:
+            return "TLSv1.1"
+        elif protocol.value == SecurityConst.kTLSProtocol1:
+            return "TLSv1"
+        elif protocol.value == SecurityConst.kSSLProtocol3:
+            return "SSLv3"
+        elif protocol.value == SecurityConst.kSSLProtocol2:
+            return "SSLv2"
+        else:
+            raise ssl.SSLError("Unknown TLS version: %r" % protocol)
+
+    def _reuse(self):
+        self._makefile_refs += 1
+
+    def _drop(self):
+        if self._makefile_refs < 1:
+            self.close()
+        else:
+            self._makefile_refs -= 1
+
+
+if _fileobject:  # Platform-specific: Python 2
+
+    def makefile(self, mode, bufsize=-1):
+        self._makefile_refs += 1
+        return _fileobject(self, mode, bufsize, close=True)
+
+
+else:  # Platform-specific: Python 3
+
+    def makefile(self, mode="r", buffering=None, *args, **kwargs):
+        # We disable buffering with SecureTransport because it conflicts with
+        # the buffering that ST does internally (see issue #1153 for more).
+        buffering = 0
+        return backport_makefile(self, mode, buffering, *args, **kwargs)
+
+
+WrappedSocket.makefile = makefile
+
+
+class SecureTransportContext(object):
+    """
+    I am a wrapper class for the SecureTransport library, to translate the
+    interface of the standard library ``SSLContext`` object to calls into
+    SecureTransport.
+    """
+
+    def __init__(self, protocol):
+        self._min_version, self._max_version = _protocol_to_min_max[protocol]
+        self._options = 0
+        self._verify = False
+        self._trust_bundle = None
+        self._client_cert = None
+        self._client_key = None
+        self._client_key_passphrase = None
+
+    @property
+    def check_hostname(self):
+        """
+        SecureTransport cannot have its hostname checking disabled. For more,
+        see the comment on getpeercert() in this file.
+        """
+        return True
+
+    @check_hostname.setter
+    def check_hostname(self, value):
+        """
+        SecureTransport cannot have its hostname checking disabled. For more,
+        see the comment on getpeercert() in this file.
+        """
+        pass
+
+    @property
+    def options(self):
+        # TODO: Well, crap.
+        #
+        # So this is the bit of the code that is the most likely to cause us
+        # trouble. Essentially we need to enumerate all of the SSL options that
+        # users might want to use and try to see if we can sensibly translate
+        # them, or whether we should just ignore them.
+        return self._options
+
+    @options.setter
+    def options(self, value):
+        # TODO: Update in line with above.
+        self._options = value
+
+    @property
+    def verify_mode(self):
+        return ssl.CERT_REQUIRED if self._verify else ssl.CERT_NONE
+
+    @verify_mode.setter
+    def verify_mode(self, value):
+        self._verify = True if value == ssl.CERT_REQUIRED else False
+
+    def set_default_verify_paths(self):
+        # So, this has to do something a bit weird. Specifically, what it does
+        # is nothing.
+        #
+        # This means that, if we had previously had load_verify_locations
+        # called, this does not undo that. We need to do that because it turns
+        # out that the rest of the urllib3 code will attempt to load the
+        # default verify paths if it hasn't been told about any paths, even if
+        # the context itself was sometime earlier. We resolve that by just
+        # ignoring it.
+        pass
+
+    def load_default_certs(self):
+        return self.set_default_verify_paths()
+
+    def set_ciphers(self, ciphers):
+        # For now, we just require the default cipher string.
+        if ciphers != util.ssl_.DEFAULT_CIPHERS:
+            raise ValueError("SecureTransport doesn't support custom cipher strings")
+
+    def load_verify_locations(self, cafile=None, capath=None, cadata=None):
+        # OK, we only really support cadata and cafile.
+        if capath is not None:
+            raise ValueError("SecureTransport does not support cert directories")
+
+        # Raise if cafile does not exist.
+        if cafile is not None:
+            with open(cafile):
+                pass
+
+        self._trust_bundle = cafile or cadata
+
+    def load_cert_chain(self, certfile, keyfile=None, password=None):
+        self._client_cert = certfile
+        self._client_key = keyfile
+        self._client_cert_passphrase = password
+
+    def wrap_socket(
+        self,
+        sock,
+        server_side=False,
+        do_handshake_on_connect=True,
+        suppress_ragged_eofs=True,
+        server_hostname=None,
+    ):
+        # So, what do we do here? Firstly, we assert some properties. This is a
+        # stripped down shim, so there is some functionality we don't support.
+        # See PEP 543 for the real deal.
+        assert not server_side
+        assert do_handshake_on_connect
+        assert suppress_ragged_eofs
+
+        # Ok, we're good to go. Now we want to create the wrapped socket object
+        # and store it in the appropriate place.
+        wrapped_socket = WrappedSocket(sock)
+
+        # Now we can handshake
+        wrapped_socket.handshake(
+            server_hostname,
+            self._verify,
+            self._trust_bundle,
+            self._min_version,
+            self._max_version,
+            self._client_cert,
+            self._client_key,
+            self._client_key_passphrase,
+        )
+        return wrapped_socket
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/socks.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/socks.py
new file mode 100644
index 0000000..9e97f7a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/contrib/socks.py
@@ -0,0 +1,210 @@
+# -*- coding: utf-8 -*-
+"""
+This module contains provisional support for SOCKS proxies from within
+urllib3. This module supports SOCKS4, SOCKS4A (an extension of SOCKS4), and
+SOCKS5. To enable its functionality, either install PySocks or install this
+module with the ``socks`` extra.
+
+The SOCKS implementation supports the full range of urllib3 features. It also
+supports the following SOCKS features:
+
+- SOCKS4A (``proxy_url='socks4a://...``)
+- SOCKS4 (``proxy_url='socks4://...``)
+- SOCKS5 with remote DNS (``proxy_url='socks5h://...``)
+- SOCKS5 with local DNS (``proxy_url='socks5://...``)
+- Usernames and passwords for the SOCKS proxy
+
+ .. note::
+    It is recommended to use ``socks5h://`` or ``socks4a://`` schemes in
+    your ``proxy_url`` to ensure that DNS resolution is done from the remote
+    server instead of client-side when connecting to a domain name.
+
+SOCKS4 supports IPv4 and domain names with the SOCKS4A extension. SOCKS5
+supports IPv4, IPv6, and domain names.
+
+When connecting to a SOCKS4 proxy the ``username`` portion of the ``proxy_url``
+will be sent as the ``userid`` section of the SOCKS request::
+
+    proxy_url="socks4a://<userid>@proxy-host"
+
+When connecting to a SOCKS5 proxy the ``username`` and ``password`` portion
+of the ``proxy_url`` will be sent as the username/password to authenticate
+with the proxy::
+
+    proxy_url="socks5h://<username>:<password>@proxy-host"
+
+"""
+from __future__ import absolute_import
+
+try:
+    import socks
+except ImportError:
+    import warnings
+    from ..exceptions import DependencyWarning
+
+    warnings.warn(
+        (
+            "SOCKS support in urllib3 requires the installation of optional "
+            "dependencies: specifically, PySocks.  For more information, see "
+            "https://urllib3.readthedocs.io/en/latest/contrib.html#socks-proxies"
+        ),
+        DependencyWarning,
+    )
+    raise
+
+from socket import error as SocketError, timeout as SocketTimeout
+
+from ..connection import HTTPConnection, HTTPSConnection
+from ..connectionpool import HTTPConnectionPool, HTTPSConnectionPool
+from ..exceptions import ConnectTimeoutError, NewConnectionError
+from ..poolmanager import PoolManager
+from ..util.url import parse_url
+
+try:
+    import ssl
+except ImportError:
+    ssl = None
+
+
+class SOCKSConnection(HTTPConnection):
+    """
+    A plain-text HTTP connection that connects via a SOCKS proxy.
+    """
+
+    def __init__(self, *args, **kwargs):
+        self._socks_options = kwargs.pop("_socks_options")
+        super(SOCKSConnection, self).__init__(*args, **kwargs)
+
+    def _new_conn(self):
+        """
+        Establish a new connection via the SOCKS proxy.
+        """
+        extra_kw = {}
+        if self.source_address:
+            extra_kw["source_address"] = self.source_address
+
+        if self.socket_options:
+            extra_kw["socket_options"] = self.socket_options
+
+        try:
+            conn = socks.create_connection(
+                (self.host, self.port),
+                proxy_type=self._socks_options["socks_version"],
+                proxy_addr=self._socks_options["proxy_host"],
+                proxy_port=self._socks_options["proxy_port"],
+                proxy_username=self._socks_options["username"],
+                proxy_password=self._socks_options["password"],
+                proxy_rdns=self._socks_options["rdns"],
+                timeout=self.timeout,
+                **extra_kw
+            )
+
+        except SocketTimeout:
+            raise ConnectTimeoutError(
+                self,
+                "Connection to %s timed out. (connect timeout=%s)"
+                % (self.host, self.timeout),
+            )
+
+        except socks.ProxyError as e:
+            # This is fragile as hell, but it seems to be the only way to raise
+            # useful errors here.
+            if e.socket_err:
+                error = e.socket_err
+                if isinstance(error, SocketTimeout):
+                    raise ConnectTimeoutError(
+                        self,
+                        "Connection to %s timed out. (connect timeout=%s)"
+                        % (self.host, self.timeout),
+                    )
+                else:
+                    raise NewConnectionError(
+                        self, "Failed to establish a new connection: %s" % error
+                    )
+            else:
+                raise NewConnectionError(
+                    self, "Failed to establish a new connection: %s" % e
+                )
+
+        except SocketError as e:  # Defensive: PySocks should catch all these.
+            raise NewConnectionError(
+                self, "Failed to establish a new connection: %s" % e
+            )
+
+        return conn
+
+
+# We don't need to duplicate the Verified/Unverified distinction from
+# urllib3/connection.py here because the HTTPSConnection will already have been
+# correctly set to either the Verified or Unverified form by that module. This
+# means the SOCKSHTTPSConnection will automatically be the correct type.
+class SOCKSHTTPSConnection(SOCKSConnection, HTTPSConnection):
+    pass
+
+
+class SOCKSHTTPConnectionPool(HTTPConnectionPool):
+    ConnectionCls = SOCKSConnection
+
+
+class SOCKSHTTPSConnectionPool(HTTPSConnectionPool):
+    ConnectionCls = SOCKSHTTPSConnection
+
+
+class SOCKSProxyManager(PoolManager):
+    """
+    A version of the urllib3 ProxyManager that routes connections via the
+    defined SOCKS proxy.
+    """
+
+    pool_classes_by_scheme = {
+        "http": SOCKSHTTPConnectionPool,
+        "https": SOCKSHTTPSConnectionPool,
+    }
+
+    def __init__(
+        self,
+        proxy_url,
+        username=None,
+        password=None,
+        num_pools=10,
+        headers=None,
+        **connection_pool_kw
+    ):
+        parsed = parse_url(proxy_url)
+
+        if username is None and password is None and parsed.auth is not None:
+            split = parsed.auth.split(":")
+            if len(split) == 2:
+                username, password = split
+        if parsed.scheme == "socks5":
+            socks_version = socks.PROXY_TYPE_SOCKS5
+            rdns = False
+        elif parsed.scheme == "socks5h":
+            socks_version = socks.PROXY_TYPE_SOCKS5
+            rdns = True
+        elif parsed.scheme == "socks4":
+            socks_version = socks.PROXY_TYPE_SOCKS4
+            rdns = False
+        elif parsed.scheme == "socks4a":
+            socks_version = socks.PROXY_TYPE_SOCKS4
+            rdns = True
+        else:
+            raise ValueError("Unable to determine SOCKS version from %s" % proxy_url)
+
+        self.proxy_url = proxy_url
+
+        socks_options = {
+            "socks_version": socks_version,
+            "proxy_host": parsed.host,
+            "proxy_port": parsed.port,
+            "username": username,
+            "password": password,
+            "rdns": rdns,
+        }
+        connection_pool_kw["_socks_options"] = socks_options
+
+        super(SOCKSProxyManager, self).__init__(
+            num_pools, headers, **connection_pool_kw
+        )
+
+        self.pool_classes_by_scheme = SOCKSProxyManager.pool_classes_by_scheme
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/exceptions.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/exceptions.py
new file mode 100644
index 0000000..5cc4d8a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/exceptions.py
@@ -0,0 +1,272 @@
+from __future__ import absolute_import
+from .packages.six.moves.http_client import IncompleteRead as httplib_IncompleteRead
+
+# Base Exceptions
+
+
+class HTTPError(Exception):
+    "Base exception used by this module."
+    pass
+
+
+class HTTPWarning(Warning):
+    "Base warning used by this module."
+    pass
+
+
+class PoolError(HTTPError):
+    "Base exception for errors caused within a pool."
+
+    def __init__(self, pool, message):
+        self.pool = pool
+        HTTPError.__init__(self, "%s: %s" % (pool, message))
+
+    def __reduce__(self):
+        # For pickling purposes.
+        return self.__class__, (None, None)
+
+
+class RequestError(PoolError):
+    "Base exception for PoolErrors that have associated URLs."
+
+    def __init__(self, pool, url, message):
+        self.url = url
+        PoolError.__init__(self, pool, message)
+
+    def __reduce__(self):
+        # For pickling purposes.
+        return self.__class__, (None, self.url, None)
+
+
+class SSLError(HTTPError):
+    "Raised when SSL certificate fails in an HTTPS connection."
+    pass
+
+
+class ProxyError(HTTPError):
+    "Raised when the connection to a proxy fails."
+
+    def __init__(self, message, error, *args):
+        super(ProxyError, self).__init__(message, error, *args)
+        self.original_error = error
+
+
+class DecodeError(HTTPError):
+    "Raised when automatic decoding based on Content-Type fails."
+    pass
+
+
+class ProtocolError(HTTPError):
+    "Raised when something unexpected happens mid-request/response."
+    pass
+
+
+#: Renamed to ProtocolError but aliased for backwards compatibility.
+ConnectionError = ProtocolError
+
+
+# Leaf Exceptions
+
+
+class MaxRetryError(RequestError):
+    """Raised when the maximum number of retries is exceeded.
+
+    :param pool: The connection pool
+    :type pool: :class:`~urllib3.connectionpool.HTTPConnectionPool`
+    :param string url: The requested Url
+    :param exceptions.Exception reason: The underlying error
+
+    """
+
+    def __init__(self, pool, url, reason=None):
+        self.reason = reason
+
+        message = "Max retries exceeded with url: %s (Caused by %r)" % (url, reason)
+
+        RequestError.__init__(self, pool, url, message)
+
+
+class HostChangedError(RequestError):
+    "Raised when an existing pool gets a request for a foreign host."
+
+    def __init__(self, pool, url, retries=3):
+        message = "Tried to open a foreign host with url: %s" % url
+        RequestError.__init__(self, pool, url, message)
+        self.retries = retries
+
+
+class TimeoutStateError(HTTPError):
+    """ Raised when passing an invalid state to a timeout """
+
+    pass
+
+
+class TimeoutError(HTTPError):
+    """ Raised when a socket timeout error occurs.
+
+    Catching this error will catch both :exc:`ReadTimeoutErrors
+    <ReadTimeoutError>` and :exc:`ConnectTimeoutErrors <ConnectTimeoutError>`.
+    """
+
+    pass
+
+
+class ReadTimeoutError(TimeoutError, RequestError):
+    "Raised when a socket timeout occurs while receiving data from a server"
+    pass
+
+
+# This timeout error does not have a URL attached and needs to inherit from the
+# base HTTPError
+class ConnectTimeoutError(TimeoutError):
+    "Raised when a socket timeout occurs while connecting to a server"
+    pass
+
+
+class NewConnectionError(ConnectTimeoutError, PoolError):
+    "Raised when we fail to establish a new connection. Usually ECONNREFUSED."
+    pass
+
+
+class EmptyPoolError(PoolError):
+    "Raised when a pool runs out of connections and no more are allowed."
+    pass
+
+
+class ClosedPoolError(PoolError):
+    "Raised when a request enters a pool after the pool has been closed."
+    pass
+
+
+class LocationValueError(ValueError, HTTPError):
+    "Raised when there is something wrong with a given URL input."
+    pass
+
+
+class LocationParseError(LocationValueError):
+    "Raised when get_host or similar fails to parse the URL input."
+
+    def __init__(self, location):
+        message = "Failed to parse: %s" % location
+        HTTPError.__init__(self, message)
+
+        self.location = location
+
+
+class ResponseError(HTTPError):
+    "Used as a container for an error reason supplied in a MaxRetryError."
+    GENERIC_ERROR = "too many error responses"
+    SPECIFIC_ERROR = "too many {status_code} error responses"
+
+
+class SecurityWarning(HTTPWarning):
+    "Warned when performing security reducing actions"
+    pass
+
+
+class SubjectAltNameWarning(SecurityWarning):
+    "Warned when connecting to a host with a certificate missing a SAN."
+    pass
+
+
+class InsecureRequestWarning(SecurityWarning):
+    "Warned when making an unverified HTTPS request."
+    pass
+
+
+class SystemTimeWarning(SecurityWarning):
+    "Warned when system time is suspected to be wrong"
+    pass
+
+
+class InsecurePlatformWarning(SecurityWarning):
+    "Warned when certain SSL configuration is not available on a platform."
+    pass
+
+
+class SNIMissingWarning(HTTPWarning):
+    "Warned when making a HTTPS request without SNI available."
+    pass
+
+
+class DependencyWarning(HTTPWarning):
+    """
+    Warned when an attempt is made to import a module with missing optional
+    dependencies.
+    """
+
+    pass
+
+
+class InvalidProxyConfigurationWarning(HTTPWarning):
+    """
+    Warned when using an HTTPS proxy and an HTTPS URL. Currently
+    urllib3 doesn't support HTTPS proxies and the proxy will be
+    contacted via HTTP instead. This warning can be fixed by
+    changing your HTTPS proxy URL into an HTTP proxy URL.
+
+    If you encounter this warning read this:
+    https://github.com/urllib3/urllib3/issues/1850
+    """
+
+    pass
+
+
+class ResponseNotChunked(ProtocolError, ValueError):
+    "Response needs to be chunked in order to read it as chunks."
+    pass
+
+
+class BodyNotHttplibCompatible(HTTPError):
+    """
+    Body should be httplib.HTTPResponse like (have an fp attribute which
+    returns raw chunks) for read_chunked().
+    """
+
+    pass
+
+
+class IncompleteRead(HTTPError, httplib_IncompleteRead):
+    """
+    Response length doesn't match expected Content-Length
+
+    Subclass of http_client.IncompleteRead to allow int value
+    for `partial` to avoid creating large objects on streamed
+    reads.
+    """
+
+    def __init__(self, partial, expected):
+        super(IncompleteRead, self).__init__(partial, expected)
+
+    def __repr__(self):
+        return "IncompleteRead(%i bytes read, %i more expected)" % (
+            self.partial,
+            self.expected,
+        )
+
+
+class InvalidHeader(HTTPError):
+    "The header provided was somehow invalid."
+    pass
+
+
+class ProxySchemeUnknown(AssertionError, ValueError):
+    "ProxyManager does not support the supplied scheme"
+    # TODO(t-8ch): Stop inheriting from AssertionError in v2.0.
+
+    def __init__(self, scheme):
+        message = "Not supported proxy scheme %s" % scheme
+        super(ProxySchemeUnknown, self).__init__(message)
+
+
+class HeaderParsingError(HTTPError):
+    "Raised by assert_header_parsing, but we convert it to a log.warning statement."
+
+    def __init__(self, defects, unparsed_data):
+        message = "%s, unparsed data: %r" % (defects or "Unknown", unparsed_data)
+        super(HeaderParsingError, self).__init__(message)
+
+
+class UnrewindableBodyError(HTTPError):
+    "urllib3 encountered an error when trying to rewind a body"
+    pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/fields.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/fields.py
new file mode 100644
index 0000000..8715b22
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/fields.py
@@ -0,0 +1,273 @@
+from __future__ import absolute_import
+import email.utils
+import mimetypes
+import re
+
+from .packages import six
+
+
+def guess_content_type(filename, default="application/octet-stream"):
+    """
+    Guess the "Content-Type" of a file.
+
+    :param filename:
+        The filename to guess the "Content-Type" of using :mod:`mimetypes`.
+    :param default:
+        If no "Content-Type" can be guessed, default to `default`.
+    """
+    if filename:
+        return mimetypes.guess_type(filename)[0] or default
+    return default
+
+
+def format_header_param_rfc2231(name, value):
+    """
+    Helper function to format and quote a single header parameter using the
+    strategy defined in RFC 2231.
+
+    Particularly useful for header parameters which might contain
+    non-ASCII values, like file names. This follows RFC 2388 Section 4.4.
+
+    :param name:
+        The name of the parameter, a string expected to be ASCII only.
+    :param value:
+        The value of the parameter, provided as ``bytes`` or `str``.
+    :ret:
+        An RFC-2231-formatted unicode string.
+    """
+    if isinstance(value, six.binary_type):
+        value = value.decode("utf-8")
+
+    if not any(ch in value for ch in '"\\\r\n'):
+        result = u'%s="%s"' % (name, value)
+        try:
+            result.encode("ascii")
+        except (UnicodeEncodeError, UnicodeDecodeError):
+            pass
+        else:
+            return result
+
+    if six.PY2:  # Python 2:
+        value = value.encode("utf-8")
+
+    # encode_rfc2231 accepts an encoded string and returns an ascii-encoded
+    # string in Python 2 but accepts and returns unicode strings in Python 3
+    value = email.utils.encode_rfc2231(value, "utf-8")
+    value = "%s*=%s" % (name, value)
+
+    if six.PY2:  # Python 2:
+        value = value.decode("utf-8")
+
+    return value
+
+
+_HTML5_REPLACEMENTS = {
+    u"\u0022": u"%22",
+    # Replace "\" with "\\".
+    u"\u005C": u"\u005C\u005C",
+    u"\u005C": u"\u005C\u005C",
+}
+
+# All control characters from 0x00 to 0x1F *except* 0x1B.
+_HTML5_REPLACEMENTS.update(
+    {
+        six.unichr(cc): u"%{:02X}".format(cc)
+        for cc in range(0x00, 0x1F + 1)
+        if cc not in (0x1B,)
+    }
+)
+
+
+def _replace_multiple(value, needles_and_replacements):
+    def replacer(match):
+        return needles_and_replacements[match.group(0)]
+
+    pattern = re.compile(
+        r"|".join([re.escape(needle) for needle in needles_and_replacements.keys()])
+    )
+
+    result = pattern.sub(replacer, value)
+
+    return result
+
+
+def format_header_param_html5(name, value):
+    """
+    Helper function to format and quote a single header parameter using the
+    HTML5 strategy.
+
+    Particularly useful for header parameters which might contain
+    non-ASCII values, like file names. This follows the `HTML5 Working Draft
+    Section 4.10.22.7`_ and matches the behavior of curl and modern browsers.
+
+    .. _HTML5 Working Draft Section 4.10.22.7:
+        https://w3c.github.io/html/sec-forms.html#multipart-form-data
+
+    :param name:
+        The name of the parameter, a string expected to be ASCII only.
+    :param value:
+        The value of the parameter, provided as ``bytes`` or `str``.
+    :ret:
+        A unicode string, stripped of troublesome characters.
+    """
+    if isinstance(value, six.binary_type):
+        value = value.decode("utf-8")
+
+    value = _replace_multiple(value, _HTML5_REPLACEMENTS)
+
+    return u'%s="%s"' % (name, value)
+
+
+# For backwards-compatibility.
+format_header_param = format_header_param_html5
+
+
+class RequestField(object):
+    """
+    A data container for request body parameters.
+
+    :param name:
+        The name of this request field. Must be unicode.
+    :param data:
+        The data/value body.
+    :param filename:
+        An optional filename of the request field. Must be unicode.
+    :param headers:
+        An optional dict-like object of headers to initially use for the field.
+    :param header_formatter:
+        An optional callable that is used to encode and format the headers. By
+        default, this is :func:`format_header_param_html5`.
+    """
+
+    def __init__(
+        self,
+        name,
+        data,
+        filename=None,
+        headers=None,
+        header_formatter=format_header_param_html5,
+    ):
+        self._name = name
+        self._filename = filename
+        self.data = data
+        self.headers = {}
+        if headers:
+            self.headers = dict(headers)
+        self.header_formatter = header_formatter
+
+    @classmethod
+    def from_tuples(cls, fieldname, value, header_formatter=format_header_param_html5):
+        """
+        A :class:`~urllib3.fields.RequestField` factory from old-style tuple parameters.
+
+        Supports constructing :class:`~urllib3.fields.RequestField` from
+        parameter of key/value strings AND key/filetuple. A filetuple is a
+        (filename, data, MIME type) tuple where the MIME type is optional.
+        For example::
+
+            'foo': 'bar',
+            'fakefile': ('foofile.txt', 'contents of foofile'),
+            'realfile': ('barfile.txt', open('realfile').read()),
+            'typedfile': ('bazfile.bin', open('bazfile').read(), 'image/jpeg'),
+            'nonamefile': 'contents of nonamefile field',
+
+        Field names and filenames must be unicode.
+        """
+        if isinstance(value, tuple):
+            if len(value) == 3:
+                filename, data, content_type = value
+            else:
+                filename, data = value
+                content_type = guess_content_type(filename)
+        else:
+            filename = None
+            content_type = None
+            data = value
+
+        request_param = cls(
+            fieldname, data, filename=filename, header_formatter=header_formatter
+        )
+        request_param.make_multipart(content_type=content_type)
+
+        return request_param
+
+    def _render_part(self, name, value):
+        """
+        Overridable helper function to format a single header parameter. By
+        default, this calls ``self.header_formatter``.
+
+        :param name:
+            The name of the parameter, a string expected to be ASCII only.
+        :param value:
+            The value of the parameter, provided as a unicode string.
+        """
+
+        return self.header_formatter(name, value)
+
+    def _render_parts(self, header_parts):
+        """
+        Helper function to format and quote a single header.
+
+        Useful for single headers that are composed of multiple items. E.g.,
+        'Content-Disposition' fields.
+
+        :param header_parts:
+            A sequence of (k, v) tuples or a :class:`dict` of (k, v) to format
+            as `k1="v1"; k2="v2"; ...`.
+        """
+        parts = []
+        iterable = header_parts
+        if isinstance(header_parts, dict):
+            iterable = header_parts.items()
+
+        for name, value in iterable:
+            if value is not None:
+                parts.append(self._render_part(name, value))
+
+        return u"; ".join(parts)
+
+    def render_headers(self):
+        """
+        Renders the headers for this request field.
+        """
+        lines = []
+
+        sort_keys = ["Content-Disposition", "Content-Type", "Content-Location"]
+        for sort_key in sort_keys:
+            if self.headers.get(sort_key, False):
+                lines.append(u"%s: %s" % (sort_key, self.headers[sort_key]))
+
+        for header_name, header_value in self.headers.items():
+            if header_name not in sort_keys:
+                if header_value:
+                    lines.append(u"%s: %s" % (header_name, header_value))
+
+        lines.append(u"\r\n")
+        return u"\r\n".join(lines)
+
+    def make_multipart(
+        self, content_disposition=None, content_type=None, content_location=None
+    ):
+        """
+        Makes this request field into a multipart request field.
+
+        This method overrides "Content-Disposition", "Content-Type" and
+        "Content-Location" headers to the request parameter.
+
+        :param content_type:
+            The 'Content-Type' of the request body.
+        :param content_location:
+            The 'Content-Location' of the request body.
+
+        """
+        self.headers["Content-Disposition"] = content_disposition or u"form-data"
+        self.headers["Content-Disposition"] += u"; ".join(
+            [
+                u"",
+                self._render_parts(
+                    ((u"name", self._name), (u"filename", self._filename))
+                ),
+            ]
+        )
+        self.headers["Content-Type"] = content_type
+        self.headers["Content-Location"] = content_location
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/filepost.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/filepost.py
new file mode 100644
index 0000000..b7b0099
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/filepost.py
@@ -0,0 +1,98 @@
+from __future__ import absolute_import
+import binascii
+import codecs
+import os
+
+from io import BytesIO
+
+from .packages import six
+from .packages.six import b
+from .fields import RequestField
+
+writer = codecs.lookup("utf-8")[3]
+
+
+def choose_boundary():
+    """
+    Our embarrassingly-simple replacement for mimetools.choose_boundary.
+    """
+    boundary = binascii.hexlify(os.urandom(16))
+    if not six.PY2:
+        boundary = boundary.decode("ascii")
+    return boundary
+
+
+def iter_field_objects(fields):
+    """
+    Iterate over fields.
+
+    Supports list of (k, v) tuples and dicts, and lists of
+    :class:`~urllib3.fields.RequestField`.
+
+    """
+    if isinstance(fields, dict):
+        i = six.iteritems(fields)
+    else:
+        i = iter(fields)
+
+    for field in i:
+        if isinstance(field, RequestField):
+            yield field
+        else:
+            yield RequestField.from_tuples(*field)
+
+
+def iter_fields(fields):
+    """
+    .. deprecated:: 1.6
+
+    Iterate over fields.
+
+    The addition of :class:`~urllib3.fields.RequestField` makes this function
+    obsolete. Instead, use :func:`iter_field_objects`, which returns
+    :class:`~urllib3.fields.RequestField` objects.
+
+    Supports list of (k, v) tuples and dicts.
+    """
+    if isinstance(fields, dict):
+        return ((k, v) for k, v in six.iteritems(fields))
+
+    return ((k, v) for k, v in fields)
+
+
+def encode_multipart_formdata(fields, boundary=None):
+    """
+    Encode a dictionary of ``fields`` using the multipart/form-data MIME format.
+
+    :param fields:
+        Dictionary of fields or list of (key, :class:`~urllib3.fields.RequestField`).
+
+    :param boundary:
+        If not specified, then a random boundary will be generated using
+        :func:`urllib3.filepost.choose_boundary`.
+    """
+    body = BytesIO()
+    if boundary is None:
+        boundary = choose_boundary()
+
+    for field in iter_field_objects(fields):
+        body.write(b("--%s\r\n" % (boundary)))
+
+        writer(body).write(field.render_headers())
+        data = field.data
+
+        if isinstance(data, int):
+            data = str(data)  # Backwards compatibility
+
+        if isinstance(data, six.text_type):
+            writer(body).write(data)
+        else:
+            body.write(data)
+
+        body.write(b"\r\n")
+
+    body.write(b("--%s--\r\n" % (boundary)))
+
+    content_type = str("multipart/form-data; boundary=%s" % boundary)
+
+    return body.getvalue(), content_type
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/__init__.py
new file mode 100644
index 0000000..fce4caa
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/__init__.py
@@ -0,0 +1,5 @@
+from __future__ import absolute_import
+
+from . import ssl_match_hostname
+
+__all__ = ("ssl_match_hostname",)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/backports/makefile.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/backports/makefile.py
new file mode 100644
index 0000000..a3156a6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/backports/makefile.py
@@ -0,0 +1,52 @@
+# -*- coding: utf-8 -*-
+"""
+backports.makefile
+~~~~~~~~~~~~~~~~~~
+
+Backports the Python 3 ``socket.makefile`` method for use with anything that
+wants to create a "fake" socket object.
+"""
+import io
+
+from socket import SocketIO
+
+
+def backport_makefile(
+    self, mode="r", buffering=None, encoding=None, errors=None, newline=None
+):
+    """
+    Backport of ``socket.makefile`` from Python 3.5.
+    """
+    if not set(mode) <= {"r", "w", "b"}:
+        raise ValueError("invalid mode %r (only r, w, b allowed)" % (mode,))
+    writing = "w" in mode
+    reading = "r" in mode or not writing
+    assert reading or writing
+    binary = "b" in mode
+    rawmode = ""
+    if reading:
+        rawmode += "r"
+    if writing:
+        rawmode += "w"
+    raw = SocketIO(self, rawmode)
+    self._makefile_refs += 1
+    if buffering is None:
+        buffering = -1
+    if buffering < 0:
+        buffering = io.DEFAULT_BUFFER_SIZE
+    if buffering == 0:
+        if not binary:
+            raise ValueError("unbuffered streams must be binary")
+        return raw
+    if reading and writing:
+        buffer = io.BufferedRWPair(raw, raw, buffering)
+    elif reading:
+        buffer = io.BufferedReader(raw, buffering)
+    else:
+        assert writing
+        buffer = io.BufferedWriter(raw, buffering)
+    if binary:
+        return buffer
+    text = io.TextIOWrapper(buffer, encoding, errors, newline)
+    text.mode = mode
+    return text
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/six.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/six.py
new file mode 100644
index 0000000..3144240
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/six.py
@@ -0,0 +1,1021 @@
+# Copyright (c) 2010-2019 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.12.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = (str,)
+    integer_types = (int,)
+    class_types = (type,)
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = (basestring,)
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+            def __len__(self):
+                return 1 << 31
+
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+
+    get_source = get_code  # same as get_code
+
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute(
+        "filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"
+    ),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("getoutput", "commands", "subprocess"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute(
+        "reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"
+    ),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute(
+        "zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"
+    ),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("email_mime_image", "email.MIMEImage", "email.mime.image"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule(
+        "email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"
+    ),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser", "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog", "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog", "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [MovedModule("winreg", "_winreg")]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute(
+        "unquote_to_bytes", "urllib", "urllib.parse", "unquote", "unquote_to_bytes"
+    ),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("splitvalue", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(
+    Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+    "moves.urllib_parse",
+    "moves.urllib.parse",
+)
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(
+    Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+    "moves.urllib_error",
+    "moves.urllib.error",
+)
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+    MovedAttribute("parse_http_list", "urllib2", "urllib.request"),
+    MovedAttribute("parse_keqv_list", "urllib2", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(
+    Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+    "moves.urllib_request",
+    "moves.urllib.request",
+)
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(
+    Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+    "moves.urllib_response",
+    "moves.urllib.response",
+)
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser")
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = (
+    _urllib_robotparser_moved_attributes
+)
+
+_importer._add_module(
+    Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+    "moves.urllib_robotparser",
+    "moves.urllib.robotparser",
+)
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ["parse", "error", "request", "response", "robotparser"]
+
+
+_importer._add_module(
+    Module_six_moves_urllib(__name__ + ".moves.urllib"), "moves.urllib"
+)
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+
+    def advance_iterator(it):
+        return it.next()
+
+
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(
+    get_unbound_function, """Get the function out of a possibly unbound function"""
+)
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems, "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(
+    iterlists, "Return an iterator over the (key, [values]) pairs of a dictionary."
+)
+
+
+if PY3:
+
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+
+    unichr = chr
+    import struct
+
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    del io
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+else:
+
+    def b(s):
+        return s
+
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r"\\", r"\\\\"), "unicode_escape")
+
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        try:
+            if value is None:
+                value = tp()
+            if value.__traceback__ is not tb:
+                raise value.with_traceback(tb)
+            raise value
+        finally:
+            value = None
+            tb = None
+
+
+else:
+
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_(
+        """def reraise(tp, value, tb=None):
+    try:
+        raise tp, value, tb
+    finally:
+        tb = None
+"""
+    )
+
+
+if sys.version_info[:2] == (3, 2):
+    exec_(
+        """def raise_from(value, from_value):
+    try:
+        if from_value is None:
+            raise value
+        raise value from from_value
+    finally:
+        value = None
+"""
+    )
+elif sys.version_info[:2] > (3, 2):
+    exec_(
+        """def raise_from(value, from_value):
+    try:
+        raise value from from_value
+    finally:
+        value = None
+"""
+    )
+else:
+
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (
+                isinstance(fp, file)
+                and isinstance(data, unicode)
+                and fp.encoding is not None
+            ):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+
+
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+
+    def wraps(
+        wrapped,
+        assigned=functools.WRAPPER_ASSIGNMENTS,
+        updated=functools.WRAPPER_UPDATES,
+    ):
+        def wrapper(f):
+            f = functools.wraps(wrapped, assigned, updated)(f)
+            f.__wrapped__ = wrapped
+            return f
+
+        return wrapper
+
+
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(type):
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+
+        @classmethod
+        def __prepare__(cls, name, this_bases):
+            return meta.__prepare__(name, bases)
+
+    return type.__new__(metaclass, "temporary_class", (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get("__slots__")
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop("__dict__", None)
+        orig_vars.pop("__weakref__", None)
+        if hasattr(cls, "__qualname__"):
+            orig_vars["__qualname__"] = cls.__qualname__
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+
+    return wrapper
+
+
+def ensure_binary(s, encoding="utf-8", errors="strict"):
+    """Coerce **s** to six.binary_type.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> encoded to `bytes`
+      - `bytes` -> `bytes`
+    """
+    if isinstance(s, text_type):
+        return s.encode(encoding, errors)
+    elif isinstance(s, binary_type):
+        return s
+    else:
+        raise TypeError("not expecting type '%s'" % type(s))
+
+
+def ensure_str(s, encoding="utf-8", errors="strict"):
+    """Coerce *s* to `str`.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    if not isinstance(s, (text_type, binary_type)):
+        raise TypeError("not expecting type '%s'" % type(s))
+    if PY2 and isinstance(s, text_type):
+        s = s.encode(encoding, errors)
+    elif PY3 and isinstance(s, binary_type):
+        s = s.decode(encoding, errors)
+    return s
+
+
+def ensure_text(s, encoding="utf-8", errors="strict"):
+    """Coerce *s* to six.text_type.
+
+    For Python 2:
+      - `unicode` -> `unicode`
+      - `str` -> `unicode`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    if isinstance(s, binary_type):
+        return s.decode(encoding, errors)
+    elif isinstance(s, text_type):
+        return s
+    else:
+        raise TypeError("not expecting type '%s'" % type(s))
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if "__str__" not in klass.__dict__:
+            raise ValueError(
+                "@python_2_unicode_compatible cannot be applied "
+                "to %s because it doesn't define __str__()." % klass.__name__
+            )
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode("utf-8")
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (
+            type(importer).__name__ == "_SixMetaPathImporter"
+            and importer.name == __name__
+        ):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__init__.py
new file mode 100644
index 0000000..75b6bb1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__init__.py
@@ -0,0 +1,19 @@
+import sys
+
+try:
+    # Our match_hostname function is the same as 3.5's, so we only want to
+    # import the match_hostname function if it's at least that good.
+    if sys.version_info < (3, 5):
+        raise ImportError("Fallback to vendored code")
+
+    from ssl import CertificateError, match_hostname
+except ImportError:
+    try:
+        # Backport of the function from a pypi module
+        from backports.ssl_match_hostname import CertificateError, match_hostname
+    except ImportError:
+        # Our vendored copy
+        from ._implementation import CertificateError, match_hostname
+
+# Not needed, but documenting what we provide.
+__all__ = ("CertificateError", "match_hostname")
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..86cb78f
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/__init__.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/_implementation.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/_implementation.cpython-38.pyc
new file mode 100644
index 0000000..86aef22
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/__pycache__/_implementation.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/_implementation.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/_implementation.py
new file mode 100644
index 0000000..5831c2e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/packages/ssl_match_hostname/_implementation.py
@@ -0,0 +1,160 @@
+"""The match_hostname() function from Python 3.3.3, essential when using SSL."""
+
+# Note: This file is under the PSF license as the code comes from the python
+# stdlib.   http://docs.python.org/3/license.html
+
+import re
+import sys
+
+# ipaddress has been backported to 2.6+ in pypi.  If it is installed on the
+# system, use it to handle IPAddress ServerAltnames (this was added in
+# python-3.5) otherwise only do DNS matching.  This allows
+# backports.ssl_match_hostname to continue to be used in Python 2.7.
+try:
+    from pip._vendor import ipaddress
+except ImportError:
+    ipaddress = None
+
+__version__ = "3.5.0.1"
+
+
+class CertificateError(ValueError):
+    pass
+
+
+def _dnsname_match(dn, hostname, max_wildcards=1):
+    """Matching according to RFC 6125, section 6.4.3
+
+    http://tools.ietf.org/html/rfc6125#section-6.4.3
+    """
+    pats = []
+    if not dn:
+        return False
+
+    # Ported from python3-syntax:
+    # leftmost, *remainder = dn.split(r'.')
+    parts = dn.split(r".")
+    leftmost = parts[0]
+    remainder = parts[1:]
+
+    wildcards = leftmost.count("*")
+    if wildcards > max_wildcards:
+        # Issue #17980: avoid denials of service by refusing more
+        # than one wildcard per fragment.  A survey of established
+        # policy among SSL implementations showed it to be a
+        # reasonable choice.
+        raise CertificateError(
+            "too many wildcards in certificate DNS name: " + repr(dn)
+        )
+
+    # speed up common case w/o wildcards
+    if not wildcards:
+        return dn.lower() == hostname.lower()
+
+    # RFC 6125, section 6.4.3, subitem 1.
+    # The client SHOULD NOT attempt to match a presented identifier in which
+    # the wildcard character comprises a label other than the left-most label.
+    if leftmost == "*":
+        # When '*' is a fragment by itself, it matches a non-empty dotless
+        # fragment.
+        pats.append("[^.]+")
+    elif leftmost.startswith("xn--") or hostname.startswith("xn--"):
+        # RFC 6125, section 6.4.3, subitem 3.
+        # The client SHOULD NOT attempt to match a presented identifier
+        # where the wildcard character is embedded within an A-label or
+        # U-label of an internationalized domain name.
+        pats.append(re.escape(leftmost))
+    else:
+        # Otherwise, '*' matches any dotless string, e.g. www*
+        pats.append(re.escape(leftmost).replace(r"\*", "[^.]*"))
+
+    # add the remaining fragments, ignore any wildcards
+    for frag in remainder:
+        pats.append(re.escape(frag))
+
+    pat = re.compile(r"\A" + r"\.".join(pats) + r"\Z", re.IGNORECASE)
+    return pat.match(hostname)
+
+
+def _to_unicode(obj):
+    if isinstance(obj, str) and sys.version_info < (3,):
+        obj = unicode(obj, encoding="ascii", errors="strict")
+    return obj
+
+
+def _ipaddress_match(ipname, host_ip):
+    """Exact matching of IP addresses.
+
+    RFC 6125 explicitly doesn't define an algorithm for this
+    (section 1.7.2 - "Out of Scope").
+    """
+    # OpenSSL may add a trailing newline to a subjectAltName's IP address
+    # Divergence from upstream: ipaddress can't handle byte str
+    ip = ipaddress.ip_address(_to_unicode(ipname).rstrip())
+    return ip == host_ip
+
+
+def match_hostname(cert, hostname):
+    """Verify that *cert* (in decoded format as returned by
+    SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
+    rules are followed, but IP addresses are not accepted for *hostname*.
+
+    CertificateError is raised on failure. On success, the function
+    returns nothing.
+    """
+    if not cert:
+        raise ValueError(
+            "empty or no certificate, match_hostname needs a "
+            "SSL socket or SSL context with either "
+            "CERT_OPTIONAL or CERT_REQUIRED"
+        )
+    try:
+        # Divergence from upstream: ipaddress can't handle byte str
+        host_ip = ipaddress.ip_address(_to_unicode(hostname))
+    except ValueError:
+        # Not an IP address (common case)
+        host_ip = None
+    except UnicodeError:
+        # Divergence from upstream: Have to deal with ipaddress not taking
+        # byte strings.  addresses should be all ascii, so we consider it not
+        # an ipaddress in this case
+        host_ip = None
+    except AttributeError:
+        # Divergence from upstream: Make ipaddress library optional
+        if ipaddress is None:
+            host_ip = None
+        else:
+            raise
+    dnsnames = []
+    san = cert.get("subjectAltName", ())
+    for key, value in san:
+        if key == "DNS":
+            if host_ip is None and _dnsname_match(value, hostname):
+                return
+            dnsnames.append(value)
+        elif key == "IP Address":
+            if host_ip is not None and _ipaddress_match(value, host_ip):
+                return
+            dnsnames.append(value)
+    if not dnsnames:
+        # The subject is only checked when there is no dNSName entry
+        # in subjectAltName
+        for sub in cert.get("subject", ()):
+            for key, value in sub:
+                # XXX according to RFC 2818, the most specific Common Name
+                # must be used.
+                if key == "commonName":
+                    if _dnsname_match(value, hostname):
+                        return
+                    dnsnames.append(value)
+    if len(dnsnames) > 1:
+        raise CertificateError(
+            "hostname %r "
+            "doesn't match either of %s" % (hostname, ", ".join(map(repr, dnsnames)))
+        )
+    elif len(dnsnames) == 1:
+        raise CertificateError("hostname %r doesn't match %r" % (hostname, dnsnames[0]))
+    else:
+        raise CertificateError(
+            "no appropriate commonName or subjectAltName fields were found"
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/poolmanager.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/poolmanager.py
new file mode 100644
index 0000000..e2bd3bd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/poolmanager.py
@@ -0,0 +1,492 @@
+from __future__ import absolute_import
+import collections
+import functools
+import logging
+import warnings
+
+from ._collections import RecentlyUsedContainer
+from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool
+from .connectionpool import port_by_scheme
+from .exceptions import (
+    LocationValueError,
+    MaxRetryError,
+    ProxySchemeUnknown,
+    InvalidProxyConfigurationWarning,
+)
+from .packages import six
+from .packages.six.moves.urllib.parse import urljoin
+from .request import RequestMethods
+from .util.url import parse_url
+from .util.retry import Retry
+
+
+__all__ = ["PoolManager", "ProxyManager", "proxy_from_url"]
+
+
+log = logging.getLogger(__name__)
+
+SSL_KEYWORDS = (
+    "key_file",
+    "cert_file",
+    "cert_reqs",
+    "ca_certs",
+    "ssl_version",
+    "ca_cert_dir",
+    "ssl_context",
+    "key_password",
+)
+
+# All known keyword arguments that could be provided to the pool manager, its
+# pools, or the underlying connections. This is used to construct a pool key.
+_key_fields = (
+    "key_scheme",  # str
+    "key_host",  # str
+    "key_port",  # int
+    "key_timeout",  # int or float or Timeout
+    "key_retries",  # int or Retry
+    "key_strict",  # bool
+    "key_block",  # bool
+    "key_source_address",  # str
+    "key_key_file",  # str
+    "key_key_password",  # str
+    "key_cert_file",  # str
+    "key_cert_reqs",  # str
+    "key_ca_certs",  # str
+    "key_ssl_version",  # str
+    "key_ca_cert_dir",  # str
+    "key_ssl_context",  # instance of ssl.SSLContext or urllib3.util.ssl_.SSLContext
+    "key_maxsize",  # int
+    "key_headers",  # dict
+    "key__proxy",  # parsed proxy url
+    "key__proxy_headers",  # dict
+    "key_socket_options",  # list of (level (int), optname (int), value (int or str)) tuples
+    "key__socks_options",  # dict
+    "key_assert_hostname",  # bool or string
+    "key_assert_fingerprint",  # str
+    "key_server_hostname",  # str
+)
+
+#: The namedtuple class used to construct keys for the connection pool.
+#: All custom key schemes should include the fields in this key at a minimum.
+PoolKey = collections.namedtuple("PoolKey", _key_fields)
+
+
+def _default_key_normalizer(key_class, request_context):
+    """
+    Create a pool key out of a request context dictionary.
+
+    According to RFC 3986, both the scheme and host are case-insensitive.
+    Therefore, this function normalizes both before constructing the pool
+    key for an HTTPS request. If you wish to change this behaviour, provide
+    alternate callables to ``key_fn_by_scheme``.
+
+    :param key_class:
+        The class to use when constructing the key. This should be a namedtuple
+        with the ``scheme`` and ``host`` keys at a minimum.
+    :type  key_class: namedtuple
+    :param request_context:
+        A dictionary-like object that contain the context for a request.
+    :type  request_context: dict
+
+    :return: A namedtuple that can be used as a connection pool key.
+    :rtype:  PoolKey
+    """
+    # Since we mutate the dictionary, make a copy first
+    context = request_context.copy()
+    context["scheme"] = context["scheme"].lower()
+    context["host"] = context["host"].lower()
+
+    # These are both dictionaries and need to be transformed into frozensets
+    for key in ("headers", "_proxy_headers", "_socks_options"):
+        if key in context and context[key] is not None:
+            context[key] = frozenset(context[key].items())
+
+    # The socket_options key may be a list and needs to be transformed into a
+    # tuple.
+    socket_opts = context.get("socket_options")
+    if socket_opts is not None:
+        context["socket_options"] = tuple(socket_opts)
+
+    # Map the kwargs to the names in the namedtuple - this is necessary since
+    # namedtuples can't have fields starting with '_'.
+    for key in list(context.keys()):
+        context["key_" + key] = context.pop(key)
+
+    # Default to ``None`` for keys missing from the context
+    for field in key_class._fields:
+        if field not in context:
+            context[field] = None
+
+    return key_class(**context)
+
+
+#: A dictionary that maps a scheme to a callable that creates a pool key.
+#: This can be used to alter the way pool keys are constructed, if desired.
+#: Each PoolManager makes a copy of this dictionary so they can be configured
+#: globally here, or individually on the instance.
+key_fn_by_scheme = {
+    "http": functools.partial(_default_key_normalizer, PoolKey),
+    "https": functools.partial(_default_key_normalizer, PoolKey),
+}
+
+pool_classes_by_scheme = {"http": HTTPConnectionPool, "https": HTTPSConnectionPool}
+
+
+class PoolManager(RequestMethods):
+    """
+    Allows for arbitrary requests while transparently keeping track of
+    necessary connection pools for you.
+
+    :param num_pools:
+        Number of connection pools to cache before discarding the least
+        recently used pool.
+
+    :param headers:
+        Headers to include with all requests, unless other headers are given
+        explicitly.
+
+    :param \\**connection_pool_kw:
+        Additional parameters are used to create fresh
+        :class:`urllib3.connectionpool.ConnectionPool` instances.
+
+    Example::
+
+        >>> manager = PoolManager(num_pools=2)
+        >>> r = manager.request('GET', 'http://google.com/')
+        >>> r = manager.request('GET', 'http://google.com/mail')
+        >>> r = manager.request('GET', 'http://yahoo.com/')
+        >>> len(manager.pools)
+        2
+
+    """
+
+    proxy = None
+
+    def __init__(self, num_pools=10, headers=None, **connection_pool_kw):
+        RequestMethods.__init__(self, headers)
+        self.connection_pool_kw = connection_pool_kw
+        self.pools = RecentlyUsedContainer(num_pools, dispose_func=lambda p: p.close())
+
+        # Locally set the pool classes and keys so other PoolManagers can
+        # override them.
+        self.pool_classes_by_scheme = pool_classes_by_scheme
+        self.key_fn_by_scheme = key_fn_by_scheme.copy()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.clear()
+        # Return False to re-raise any potential exceptions
+        return False
+
+    def _new_pool(self, scheme, host, port, request_context=None):
+        """
+        Create a new :class:`ConnectionPool` based on host, port, scheme, and
+        any additional pool keyword arguments.
+
+        If ``request_context`` is provided, it is provided as keyword arguments
+        to the pool class used. This method is used to actually create the
+        connection pools handed out by :meth:`connection_from_url` and
+        companion methods. It is intended to be overridden for customization.
+        """
+        pool_cls = self.pool_classes_by_scheme[scheme]
+        if request_context is None:
+            request_context = self.connection_pool_kw.copy()
+
+        # Although the context has everything necessary to create the pool,
+        # this function has historically only used the scheme, host, and port
+        # in the positional args. When an API change is acceptable these can
+        # be removed.
+        for key in ("scheme", "host", "port"):
+            request_context.pop(key, None)
+
+        if scheme == "http":
+            for kw in SSL_KEYWORDS:
+                request_context.pop(kw, None)
+
+        return pool_cls(host, port, **request_context)
+
+    def clear(self):
+        """
+        Empty our store of pools and direct them all to close.
+
+        This will not affect in-flight connections, but they will not be
+        re-used after completion.
+        """
+        self.pools.clear()
+
+    def connection_from_host(self, host, port=None, scheme="http", pool_kwargs=None):
+        """
+        Get a :class:`ConnectionPool` based on the host, port, and scheme.
+
+        If ``port`` isn't given, it will be derived from the ``scheme`` using
+        ``urllib3.connectionpool.port_by_scheme``. If ``pool_kwargs`` is
+        provided, it is merged with the instance's ``connection_pool_kw``
+        variable and used to create the new connection pool, if one is
+        needed.
+        """
+
+        if not host:
+            raise LocationValueError("No host specified.")
+
+        request_context = self._merge_pool_kwargs(pool_kwargs)
+        request_context["scheme"] = scheme or "http"
+        if not port:
+            port = port_by_scheme.get(request_context["scheme"].lower(), 80)
+        request_context["port"] = port
+        request_context["host"] = host
+
+        return self.connection_from_context(request_context)
+
+    def connection_from_context(self, request_context):
+        """
+        Get a :class:`ConnectionPool` based on the request context.
+
+        ``request_context`` must at least contain the ``scheme`` key and its
+        value must be a key in ``key_fn_by_scheme`` instance variable.
+        """
+        scheme = request_context["scheme"].lower()
+        pool_key_constructor = self.key_fn_by_scheme[scheme]
+        pool_key = pool_key_constructor(request_context)
+
+        return self.connection_from_pool_key(pool_key, request_context=request_context)
+
+    def connection_from_pool_key(self, pool_key, request_context=None):
+        """
+        Get a :class:`ConnectionPool` based on the provided pool key.
+
+        ``pool_key`` should be a namedtuple that only contains immutable
+        objects. At a minimum it must have the ``scheme``, ``host``, and
+        ``port`` fields.
+        """
+        with self.pools.lock:
+            # If the scheme, host, or port doesn't match existing open
+            # connections, open a new ConnectionPool.
+            pool = self.pools.get(pool_key)
+            if pool:
+                return pool
+
+            # Make a fresh ConnectionPool of the desired type
+            scheme = request_context["scheme"]
+            host = request_context["host"]
+            port = request_context["port"]
+            pool = self._new_pool(scheme, host, port, request_context=request_context)
+            self.pools[pool_key] = pool
+
+        return pool
+
+    def connection_from_url(self, url, pool_kwargs=None):
+        """
+        Similar to :func:`urllib3.connectionpool.connection_from_url`.
+
+        If ``pool_kwargs`` is not provided and a new pool needs to be
+        constructed, ``self.connection_pool_kw`` is used to initialize
+        the :class:`urllib3.connectionpool.ConnectionPool`. If ``pool_kwargs``
+        is provided, it is used instead. Note that if a new pool does not
+        need to be created for the request, the provided ``pool_kwargs`` are
+        not used.
+        """
+        u = parse_url(url)
+        return self.connection_from_host(
+            u.host, port=u.port, scheme=u.scheme, pool_kwargs=pool_kwargs
+        )
+
+    def _merge_pool_kwargs(self, override):
+        """
+        Merge a dictionary of override values for self.connection_pool_kw.
+
+        This does not modify self.connection_pool_kw and returns a new dict.
+        Any keys in the override dictionary with a value of ``None`` are
+        removed from the merged dictionary.
+        """
+        base_pool_kwargs = self.connection_pool_kw.copy()
+        if override:
+            for key, value in override.items():
+                if value is None:
+                    try:
+                        del base_pool_kwargs[key]
+                    except KeyError:
+                        pass
+                else:
+                    base_pool_kwargs[key] = value
+        return base_pool_kwargs
+
+    def urlopen(self, method, url, redirect=True, **kw):
+        """
+        Same as :meth:`urllib3.connectionpool.HTTPConnectionPool.urlopen`
+        with custom cross-host redirect logic and only sends the request-uri
+        portion of the ``url``.
+
+        The given ``url`` parameter must be absolute, such that an appropriate
+        :class:`urllib3.connectionpool.ConnectionPool` can be chosen for it.
+        """
+        u = parse_url(url)
+        conn = self.connection_from_host(u.host, port=u.port, scheme=u.scheme)
+
+        kw["assert_same_host"] = False
+        kw["redirect"] = False
+
+        if "headers" not in kw:
+            kw["headers"] = self.headers.copy()
+
+        if self.proxy is not None and u.scheme == "http":
+            response = conn.urlopen(method, url, **kw)
+        else:
+            response = conn.urlopen(method, u.request_uri, **kw)
+
+        redirect_location = redirect and response.get_redirect_location()
+        if not redirect_location:
+            return response
+
+        # Support relative URLs for redirecting.
+        redirect_location = urljoin(url, redirect_location)
+
+        # RFC 7231, Section 6.4.4
+        if response.status == 303:
+            method = "GET"
+
+        retries = kw.get("retries")
+        if not isinstance(retries, Retry):
+            retries = Retry.from_int(retries, redirect=redirect)
+
+        # Strip headers marked as unsafe to forward to the redirected location.
+        # Check remove_headers_on_redirect to avoid a potential network call within
+        # conn.is_same_host() which may use socket.gethostbyname() in the future.
+        if retries.remove_headers_on_redirect and not conn.is_same_host(
+            redirect_location
+        ):
+            headers = list(six.iterkeys(kw["headers"]))
+            for header in headers:
+                if header.lower() in retries.remove_headers_on_redirect:
+                    kw["headers"].pop(header, None)
+
+        try:
+            retries = retries.increment(method, url, response=response, _pool=conn)
+        except MaxRetryError:
+            if retries.raise_on_redirect:
+                response.drain_conn()
+                raise
+            return response
+
+        kw["retries"] = retries
+        kw["redirect"] = redirect
+
+        log.info("Redirecting %s -> %s", url, redirect_location)
+
+        response.drain_conn()
+        return self.urlopen(method, redirect_location, **kw)
+
+
+class ProxyManager(PoolManager):
+    """
+    Behaves just like :class:`PoolManager`, but sends all requests through
+    the defined proxy, using the CONNECT method for HTTPS URLs.
+
+    :param proxy_url:
+        The URL of the proxy to be used.
+
+    :param proxy_headers:
+        A dictionary containing headers that will be sent to the proxy. In case
+        of HTTP they are being sent with each request, while in the
+        HTTPS/CONNECT case they are sent only once. Could be used for proxy
+        authentication.
+
+    Example:
+        >>> proxy = urllib3.ProxyManager('http://localhost:3128/')
+        >>> r1 = proxy.request('GET', 'http://google.com/')
+        >>> r2 = proxy.request('GET', 'http://httpbin.org/')
+        >>> len(proxy.pools)
+        1
+        >>> r3 = proxy.request('GET', 'https://httpbin.org/')
+        >>> r4 = proxy.request('GET', 'https://twitter.com/')
+        >>> len(proxy.pools)
+        3
+
+    """
+
+    def __init__(
+        self,
+        proxy_url,
+        num_pools=10,
+        headers=None,
+        proxy_headers=None,
+        **connection_pool_kw
+    ):
+
+        if isinstance(proxy_url, HTTPConnectionPool):
+            proxy_url = "%s://%s:%i" % (
+                proxy_url.scheme,
+                proxy_url.host,
+                proxy_url.port,
+            )
+        proxy = parse_url(proxy_url)
+        if not proxy.port:
+            port = port_by_scheme.get(proxy.scheme, 80)
+            proxy = proxy._replace(port=port)
+
+        if proxy.scheme not in ("http", "https"):
+            raise ProxySchemeUnknown(proxy.scheme)
+
+        self.proxy = proxy
+        self.proxy_headers = proxy_headers or {}
+
+        connection_pool_kw["_proxy"] = self.proxy
+        connection_pool_kw["_proxy_headers"] = self.proxy_headers
+
+        super(ProxyManager, self).__init__(num_pools, headers, **connection_pool_kw)
+
+    def connection_from_host(self, host, port=None, scheme="http", pool_kwargs=None):
+        if scheme == "https":
+            return super(ProxyManager, self).connection_from_host(
+                host, port, scheme, pool_kwargs=pool_kwargs
+            )
+
+        return super(ProxyManager, self).connection_from_host(
+            self.proxy.host, self.proxy.port, self.proxy.scheme, pool_kwargs=pool_kwargs
+        )
+
+    def _set_proxy_headers(self, url, headers=None):
+        """
+        Sets headers needed by proxies: specifically, the Accept and Host
+        headers. Only sets headers not provided by the user.
+        """
+        headers_ = {"Accept": "*/*"}
+
+        netloc = parse_url(url).netloc
+        if netloc:
+            headers_["Host"] = netloc
+
+        if headers:
+            headers_.update(headers)
+        return headers_
+
+    def _validate_proxy_scheme_url_selection(self, url_scheme):
+        if url_scheme == "https" and self.proxy.scheme == "https":
+            warnings.warn(
+                "Your proxy configuration specified an HTTPS scheme for the proxy. "
+                "Are you sure you want to use HTTPS to contact the proxy? "
+                "This most likely indicates an error in your configuration. "
+                "Read this issue for more info: "
+                "https://github.com/urllib3/urllib3/issues/1850",
+                InvalidProxyConfigurationWarning,
+                stacklevel=3,
+            )
+
+    def urlopen(self, method, url, redirect=True, **kw):
+        "Same as HTTP(S)ConnectionPool.urlopen, ``url`` must be absolute."
+        u = parse_url(url)
+        self._validate_proxy_scheme_url_selection(u.scheme)
+
+        if u.scheme == "http":
+            # For proxied HTTPS requests, httplib sets the necessary headers
+            # on the CONNECT to the proxy. For HTTP, we'll definitely
+            # need to set 'Host' at the very least.
+            headers = kw.get("headers", self.headers)
+            kw["headers"] = self._set_proxy_headers(url, headers)
+
+        return super(ProxyManager, self).urlopen(method, url, redirect=redirect, **kw)
+
+
+def proxy_from_url(url, **kw):
+    return ProxyManager(proxy_url=url, **kw)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/request.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/request.py
new file mode 100644
index 0000000..55f160b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/request.py
@@ -0,0 +1,171 @@
+from __future__ import absolute_import
+
+from .filepost import encode_multipart_formdata
+from .packages.six.moves.urllib.parse import urlencode
+
+
+__all__ = ["RequestMethods"]
+
+
+class RequestMethods(object):
+    """
+    Convenience mixin for classes who implement a :meth:`urlopen` method, such
+    as :class:`~urllib3.connectionpool.HTTPConnectionPool` and
+    :class:`~urllib3.poolmanager.PoolManager`.
+
+    Provides behavior for making common types of HTTP request methods and
+    decides which type of request field encoding to use.
+
+    Specifically,
+
+    :meth:`.request_encode_url` is for sending requests whose fields are
+    encoded in the URL (such as GET, HEAD, DELETE).
+
+    :meth:`.request_encode_body` is for sending requests whose fields are
+    encoded in the *body* of the request using multipart or www-form-urlencoded
+    (such as for POST, PUT, PATCH).
+
+    :meth:`.request` is for making any kind of request, it will look up the
+    appropriate encoding format and use one of the above two methods to make
+    the request.
+
+    Initializer parameters:
+
+    :param headers:
+        Headers to include with all requests, unless other headers are given
+        explicitly.
+    """
+
+    _encode_url_methods = {"DELETE", "GET", "HEAD", "OPTIONS"}
+
+    def __init__(self, headers=None):
+        self.headers = headers or {}
+
+    def urlopen(
+        self,
+        method,
+        url,
+        body=None,
+        headers=None,
+        encode_multipart=True,
+        multipart_boundary=None,
+        **kw
+    ):  # Abstract
+        raise NotImplementedError(
+            "Classes extending RequestMethods must implement "
+            "their own ``urlopen`` method."
+        )
+
+    def request(self, method, url, fields=None, headers=None, **urlopen_kw):
+        """
+        Make a request using :meth:`urlopen` with the appropriate encoding of
+        ``fields`` based on the ``method`` used.
+
+        This is a convenience method that requires the least amount of manual
+        effort. It can be used in most situations, while still having the
+        option to drop down to more specific methods when necessary, such as
+        :meth:`request_encode_url`, :meth:`request_encode_body`,
+        or even the lowest level :meth:`urlopen`.
+        """
+        method = method.upper()
+
+        urlopen_kw["request_url"] = url
+
+        if method in self._encode_url_methods:
+            return self.request_encode_url(
+                method, url, fields=fields, headers=headers, **urlopen_kw
+            )
+        else:
+            return self.request_encode_body(
+                method, url, fields=fields, headers=headers, **urlopen_kw
+            )
+
+    def request_encode_url(self, method, url, fields=None, headers=None, **urlopen_kw):
+        """
+        Make a request using :meth:`urlopen` with the ``fields`` encoded in
+        the url. This is useful for request methods like GET, HEAD, DELETE, etc.
+        """
+        if headers is None:
+            headers = self.headers
+
+        extra_kw = {"headers": headers}
+        extra_kw.update(urlopen_kw)
+
+        if fields:
+            url += "?" + urlencode(fields)
+
+        return self.urlopen(method, url, **extra_kw)
+
+    def request_encode_body(
+        self,
+        method,
+        url,
+        fields=None,
+        headers=None,
+        encode_multipart=True,
+        multipart_boundary=None,
+        **urlopen_kw
+    ):
+        """
+        Make a request using :meth:`urlopen` with the ``fields`` encoded in
+        the body. This is useful for request methods like POST, PUT, PATCH, etc.
+
+        When ``encode_multipart=True`` (default), then
+        :meth:`urllib3.filepost.encode_multipart_formdata` is used to encode
+        the payload with the appropriate content type. Otherwise
+        :meth:`urllib.urlencode` is used with the
+        'application/x-www-form-urlencoded' content type.
+
+        Multipart encoding must be used when posting files, and it's reasonably
+        safe to use it in other times too. However, it may break request
+        signing, such as with OAuth.
+
+        Supports an optional ``fields`` parameter of key/value strings AND
+        key/filetuple. A filetuple is a (filename, data, MIME type) tuple where
+        the MIME type is optional. For example::
+
+            fields = {
+                'foo': 'bar',
+                'fakefile': ('foofile.txt', 'contents of foofile'),
+                'realfile': ('barfile.txt', open('realfile').read()),
+                'typedfile': ('bazfile.bin', open('bazfile').read(),
+                              'image/jpeg'),
+                'nonamefile': 'contents of nonamefile field',
+            }
+
+        When uploading a file, providing a filename (the first parameter of the
+        tuple) is optional but recommended to best mimic behavior of browsers.
+
+        Note that if ``headers`` are supplied, the 'Content-Type' header will
+        be overwritten because it depends on the dynamic random boundary string
+        which is used to compose the body of the request. The random boundary
+        string can be explicitly set with the ``multipart_boundary`` parameter.
+        """
+        if headers is None:
+            headers = self.headers
+
+        extra_kw = {"headers": {}}
+
+        if fields:
+            if "body" in urlopen_kw:
+                raise TypeError(
+                    "request got values for both 'fields' and 'body', can only specify one."
+                )
+
+            if encode_multipart:
+                body, content_type = encode_multipart_formdata(
+                    fields, boundary=multipart_boundary
+                )
+            else:
+                body, content_type = (
+                    urlencode(fields),
+                    "application/x-www-form-urlencoded",
+                )
+
+            extra_kw["body"] = body
+            extra_kw["headers"] = {"Content-Type": content_type}
+
+        extra_kw["headers"].update(headers)
+        extra_kw.update(urlopen_kw)
+
+        return self.urlopen(method, url, **extra_kw)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py
new file mode 100644
index 0000000..7dc9b93
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/response.py
@@ -0,0 +1,821 @@
+from __future__ import absolute_import
+from contextlib import contextmanager
+import zlib
+import io
+import logging
+from socket import timeout as SocketTimeout
+from socket import error as SocketError
+
+try:
+    import brotli
+except ImportError:
+    brotli = None
+
+from ._collections import HTTPHeaderDict
+from .exceptions import (
+    BodyNotHttplibCompatible,
+    ProtocolError,
+    DecodeError,
+    ReadTimeoutError,
+    ResponseNotChunked,
+    IncompleteRead,
+    InvalidHeader,
+    HTTPError,
+)
+from .packages.six import string_types as basestring, PY3
+from .packages.six.moves import http_client as httplib
+from .connection import HTTPException, BaseSSLError
+from .util.response import is_fp_closed, is_response_to_head
+
+log = logging.getLogger(__name__)
+
+
+class DeflateDecoder(object):
+    def __init__(self):
+        self._first_try = True
+        self._data = b""
+        self._obj = zlib.decompressobj()
+
+    def __getattr__(self, name):
+        return getattr(self._obj, name)
+
+    def decompress(self, data):
+        if not data:
+            return data
+
+        if not self._first_try:
+            return self._obj.decompress(data)
+
+        self._data += data
+        try:
+            decompressed = self._obj.decompress(data)
+            if decompressed:
+                self._first_try = False
+                self._data = None
+            return decompressed
+        except zlib.error:
+            self._first_try = False
+            self._obj = zlib.decompressobj(-zlib.MAX_WBITS)
+            try:
+                return self.decompress(self._data)
+            finally:
+                self._data = None
+
+
+class GzipDecoderState(object):
+
+    FIRST_MEMBER = 0
+    OTHER_MEMBERS = 1
+    SWALLOW_DATA = 2
+
+
+class GzipDecoder(object):
+    def __init__(self):
+        self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
+        self._state = GzipDecoderState.FIRST_MEMBER
+
+    def __getattr__(self, name):
+        return getattr(self._obj, name)
+
+    def decompress(self, data):
+        ret = bytearray()
+        if self._state == GzipDecoderState.SWALLOW_DATA or not data:
+            return bytes(ret)
+        while True:
+            try:
+                ret += self._obj.decompress(data)
+            except zlib.error:
+                previous_state = self._state
+                # Ignore data after the first error
+                self._state = GzipDecoderState.SWALLOW_DATA
+                if previous_state == GzipDecoderState.OTHER_MEMBERS:
+                    # Allow trailing garbage acceptable in other gzip clients
+                    return bytes(ret)
+                raise
+            data = self._obj.unused_data
+            if not data:
+                return bytes(ret)
+            self._state = GzipDecoderState.OTHER_MEMBERS
+            self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
+
+
+if brotli is not None:
+
+    class BrotliDecoder(object):
+        # Supports both 'brotlipy' and 'Brotli' packages
+        # since they share an import name. The top branches
+        # are for 'brotlipy' and bottom branches for 'Brotli'
+        def __init__(self):
+            self._obj = brotli.Decompressor()
+
+        def decompress(self, data):
+            if hasattr(self._obj, "decompress"):
+                return self._obj.decompress(data)
+            return self._obj.process(data)
+
+        def flush(self):
+            if hasattr(self._obj, "flush"):
+                return self._obj.flush()
+            return b""
+
+
+class MultiDecoder(object):
+    """
+    From RFC7231:
+        If one or more encodings have been applied to a representation, the
+        sender that applied the encodings MUST generate a Content-Encoding
+        header field that lists the content codings in the order in which
+        they were applied.
+    """
+
+    def __init__(self, modes):
+        self._decoders = [_get_decoder(m.strip()) for m in modes.split(",")]
+
+    def flush(self):
+        return self._decoders[0].flush()
+
+    def decompress(self, data):
+        for d in reversed(self._decoders):
+            data = d.decompress(data)
+        return data
+
+
+def _get_decoder(mode):
+    if "," in mode:
+        return MultiDecoder(mode)
+
+    if mode == "gzip":
+        return GzipDecoder()
+
+    if brotli is not None and mode == "br":
+        return BrotliDecoder()
+
+    return DeflateDecoder()
+
+
+class HTTPResponse(io.IOBase):
+    """
+    HTTP Response container.
+
+    Backwards-compatible to httplib's HTTPResponse but the response ``body`` is
+    loaded and decoded on-demand when the ``data`` property is accessed.  This
+    class is also compatible with the Python standard library's :mod:`io`
+    module, and can hence be treated as a readable object in the context of that
+    framework.
+
+    Extra parameters for behaviour not present in httplib.HTTPResponse:
+
+    :param preload_content:
+        If True, the response's body will be preloaded during construction.
+
+    :param decode_content:
+        If True, will attempt to decode the body based on the
+        'content-encoding' header.
+
+    :param original_response:
+        When this HTTPResponse wrapper is generated from an httplib.HTTPResponse
+        object, it's convenient to include the original for debug purposes. It's
+        otherwise unused.
+
+    :param retries:
+        The retries contains the last :class:`~urllib3.util.retry.Retry` that
+        was used during the request.
+
+    :param enforce_content_length:
+        Enforce content length checking. Body returned by server must match
+        value of Content-Length header, if present. Otherwise, raise error.
+    """
+
+    CONTENT_DECODERS = ["gzip", "deflate"]
+    if brotli is not None:
+        CONTENT_DECODERS += ["br"]
+    REDIRECT_STATUSES = [301, 302, 303, 307, 308]
+
+    def __init__(
+        self,
+        body="",
+        headers=None,
+        status=0,
+        version=0,
+        reason=None,
+        strict=0,
+        preload_content=True,
+        decode_content=True,
+        original_response=None,
+        pool=None,
+        connection=None,
+        msg=None,
+        retries=None,
+        enforce_content_length=False,
+        request_method=None,
+        request_url=None,
+        auto_close=True,
+    ):
+
+        if isinstance(headers, HTTPHeaderDict):
+            self.headers = headers
+        else:
+            self.headers = HTTPHeaderDict(headers)
+        self.status = status
+        self.version = version
+        self.reason = reason
+        self.strict = strict
+        self.decode_content = decode_content
+        self.retries = retries
+        self.enforce_content_length = enforce_content_length
+        self.auto_close = auto_close
+
+        self._decoder = None
+        self._body = None
+        self._fp = None
+        self._original_response = original_response
+        self._fp_bytes_read = 0
+        self.msg = msg
+        self._request_url = request_url
+
+        if body and isinstance(body, (basestring, bytes)):
+            self._body = body
+
+        self._pool = pool
+        self._connection = connection
+
+        if hasattr(body, "read"):
+            self._fp = body
+
+        # Are we using the chunked-style of transfer encoding?
+        self.chunked = False
+        self.chunk_left = None
+        tr_enc = self.headers.get("transfer-encoding", "").lower()
+        # Don't incur the penalty of creating a list and then discarding it
+        encodings = (enc.strip() for enc in tr_enc.split(","))
+        if "chunked" in encodings:
+            self.chunked = True
+
+        # Determine length of response
+        self.length_remaining = self._init_length(request_method)
+
+        # If requested, preload the body.
+        if preload_content and not self._body:
+            self._body = self.read(decode_content=decode_content)
+
+    def get_redirect_location(self):
+        """
+        Should we redirect and where to?
+
+        :returns: Truthy redirect location string if we got a redirect status
+            code and valid location. ``None`` if redirect status and no
+            location. ``False`` if not a redirect status code.
+        """
+        if self.status in self.REDIRECT_STATUSES:
+            return self.headers.get("location")
+
+        return False
+
+    def release_conn(self):
+        if not self._pool or not self._connection:
+            return
+
+        self._pool._put_conn(self._connection)
+        self._connection = None
+
+    def drain_conn(self):
+        """
+        Read and discard any remaining HTTP response data in the response connection.
+
+        Unread data in the HTTPResponse connection blocks the connection from being released back to the pool.
+        """
+        try:
+            self.read()
+        except (HTTPError, SocketError, BaseSSLError, HTTPException):
+            pass
+
+    @property
+    def data(self):
+        # For backwords-compat with earlier urllib3 0.4 and earlier.
+        if self._body:
+            return self._body
+
+        if self._fp:
+            return self.read(cache_content=True)
+
+    @property
+    def connection(self):
+        return self._connection
+
+    def isclosed(self):
+        return is_fp_closed(self._fp)
+
+    def tell(self):
+        """
+        Obtain the number of bytes pulled over the wire so far. May differ from
+        the amount of content returned by :meth:``HTTPResponse.read`` if bytes
+        are encoded on the wire (e.g, compressed).
+        """
+        return self._fp_bytes_read
+
+    def _init_length(self, request_method):
+        """
+        Set initial length value for Response content if available.
+        """
+        length = self.headers.get("content-length")
+
+        if length is not None:
+            if self.chunked:
+                # This Response will fail with an IncompleteRead if it can't be
+                # received as chunked. This method falls back to attempt reading
+                # the response before raising an exception.
+                log.warning(
+                    "Received response with both Content-Length and "
+                    "Transfer-Encoding set. This is expressly forbidden "
+                    "by RFC 7230 sec 3.3.2. Ignoring Content-Length and "
+                    "attempting to process response as Transfer-Encoding: "
+                    "chunked."
+                )
+                return None
+
+            try:
+                # RFC 7230 section 3.3.2 specifies multiple content lengths can
+                # be sent in a single Content-Length header
+                # (e.g. Content-Length: 42, 42). This line ensures the values
+                # are all valid ints and that as long as the `set` length is 1,
+                # all values are the same. Otherwise, the header is invalid.
+                lengths = set([int(val) for val in length.split(",")])
+                if len(lengths) > 1:
+                    raise InvalidHeader(
+                        "Content-Length contained multiple "
+                        "unmatching values (%s)" % length
+                    )
+                length = lengths.pop()
+            except ValueError:
+                length = None
+            else:
+                if length < 0:
+                    length = None
+
+        # Convert status to int for comparison
+        # In some cases, httplib returns a status of "_UNKNOWN"
+        try:
+            status = int(self.status)
+        except ValueError:
+            status = 0
+
+        # Check for responses that shouldn't include a body
+        if status in (204, 304) or 100 <= status < 200 or request_method == "HEAD":
+            length = 0
+
+        return length
+
+    def _init_decoder(self):
+        """
+        Set-up the _decoder attribute if necessary.
+        """
+        # Note: content-encoding value should be case-insensitive, per RFC 7230
+        # Section 3.2
+        content_encoding = self.headers.get("content-encoding", "").lower()
+        if self._decoder is None:
+            if content_encoding in self.CONTENT_DECODERS:
+                self._decoder = _get_decoder(content_encoding)
+            elif "," in content_encoding:
+                encodings = [
+                    e.strip()
+                    for e in content_encoding.split(",")
+                    if e.strip() in self.CONTENT_DECODERS
+                ]
+                if len(encodings):
+                    self._decoder = _get_decoder(content_encoding)
+
+    DECODER_ERROR_CLASSES = (IOError, zlib.error)
+    if brotli is not None:
+        DECODER_ERROR_CLASSES += (brotli.error,)
+
+    def _decode(self, data, decode_content, flush_decoder):
+        """
+        Decode the data passed in and potentially flush the decoder.
+        """
+        if not decode_content:
+            return data
+
+        try:
+            if self._decoder:
+                data = self._decoder.decompress(data)
+        except self.DECODER_ERROR_CLASSES as e:
+            content_encoding = self.headers.get("content-encoding", "").lower()
+            raise DecodeError(
+                "Received response with content-encoding: %s, but "
+                "failed to decode it." % content_encoding,
+                e,
+            )
+        if flush_decoder:
+            data += self._flush_decoder()
+
+        return data
+
+    def _flush_decoder(self):
+        """
+        Flushes the decoder. Should only be called if the decoder is actually
+        being used.
+        """
+        if self._decoder:
+            buf = self._decoder.decompress(b"")
+            return buf + self._decoder.flush()
+
+        return b""
+
+    @contextmanager
+    def _error_catcher(self):
+        """
+        Catch low-level python exceptions, instead re-raising urllib3
+        variants, so that low-level exceptions are not leaked in the
+        high-level api.
+
+        On exit, release the connection back to the pool.
+        """
+        clean_exit = False
+
+        try:
+            try:
+                yield
+
+            except SocketTimeout:
+                # FIXME: Ideally we'd like to include the url in the ReadTimeoutError but
+                # there is yet no clean way to get at it from this context.
+                raise ReadTimeoutError(self._pool, None, "Read timed out.")
+
+            except BaseSSLError as e:
+                # FIXME: Is there a better way to differentiate between SSLErrors?
+                if "read operation timed out" not in str(e):  # Defensive:
+                    # This shouldn't happen but just in case we're missing an edge
+                    # case, let's avoid swallowing SSL errors.
+                    raise
+
+                raise ReadTimeoutError(self._pool, None, "Read timed out.")
+
+            except (HTTPException, SocketError) as e:
+                # This includes IncompleteRead.
+                raise ProtocolError("Connection broken: %r" % e, e)
+
+            # If no exception is thrown, we should avoid cleaning up
+            # unnecessarily.
+            clean_exit = True
+        finally:
+            # If we didn't terminate cleanly, we need to throw away our
+            # connection.
+            if not clean_exit:
+                # The response may not be closed but we're not going to use it
+                # anymore so close it now to ensure that the connection is
+                # released back to the pool.
+                if self._original_response:
+                    self._original_response.close()
+
+                # Closing the response may not actually be sufficient to close
+                # everything, so if we have a hold of the connection close that
+                # too.
+                if self._connection:
+                    self._connection.close()
+
+            # If we hold the original response but it's closed now, we should
+            # return the connection back to the pool.
+            if self._original_response and self._original_response.isclosed():
+                self.release_conn()
+
+    def read(self, amt=None, decode_content=None, cache_content=False):
+        """
+        Similar to :meth:`httplib.HTTPResponse.read`, but with two additional
+        parameters: ``decode_content`` and ``cache_content``.
+
+        :param amt:
+            How much of the content to read. If specified, caching is skipped
+            because it doesn't make sense to cache partial content as the full
+            response.
+
+        :param decode_content:
+            If True, will attempt to decode the body based on the
+            'content-encoding' header.
+
+        :param cache_content:
+            If True, will save the returned data such that the same result is
+            returned despite of the state of the underlying file object. This
+            is useful if you want the ``.data`` property to continue working
+            after having ``.read()`` the file object. (Overridden if ``amt`` is
+            set.)
+        """
+        self._init_decoder()
+        if decode_content is None:
+            decode_content = self.decode_content
+
+        if self._fp is None:
+            return
+
+        flush_decoder = False
+        fp_closed = getattr(self._fp, "closed", False)
+
+        with self._error_catcher():
+            if amt is None:
+                # cStringIO doesn't like amt=None
+                data = self._fp.read() if not fp_closed else b""
+                flush_decoder = True
+            else:
+                cache_content = False
+                data = self._fp.read(amt) if not fp_closed else b""
+                if (
+                    amt != 0 and not data
+                ):  # Platform-specific: Buggy versions of Python.
+                    # Close the connection when no data is returned
+                    #
+                    # This is redundant to what httplib/http.client _should_
+                    # already do.  However, versions of python released before
+                    # December 15, 2012 (http://bugs.python.org/issue16298) do
+                    # not properly close the connection in all cases. There is
+                    # no harm in redundantly calling close.
+                    self._fp.close()
+                    flush_decoder = True
+                    if self.enforce_content_length and self.length_remaining not in (
+                        0,
+                        None,
+                    ):
+                        # This is an edge case that httplib failed to cover due
+                        # to concerns of backward compatibility. We're
+                        # addressing it here to make sure IncompleteRead is
+                        # raised during streaming, so all calls with incorrect
+                        # Content-Length are caught.
+                        raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
+
+        if data:
+            self._fp_bytes_read += len(data)
+            if self.length_remaining is not None:
+                self.length_remaining -= len(data)
+
+            data = self._decode(data, decode_content, flush_decoder)
+
+            if cache_content:
+                self._body = data
+
+        return data
+
+    def stream(self, amt=2 ** 16, decode_content=None):
+        """
+        A generator wrapper for the read() method. A call will block until
+        ``amt`` bytes have been read from the connection or until the
+        connection is closed.
+
+        :param amt:
+            How much of the content to read. The generator will return up to
+            much data per iteration, but may return less. This is particularly
+            likely when using compressed data. However, the empty string will
+            never be returned.
+
+        :param decode_content:
+            If True, will attempt to decode the body based on the
+            'content-encoding' header.
+        """
+        if self.chunked and self.supports_chunked_reads():
+            for line in self.read_chunked(amt, decode_content=decode_content):
+                yield line
+        else:
+            while not is_fp_closed(self._fp):
+                data = self.read(amt=amt, decode_content=decode_content)
+
+                if data:
+                    yield data
+
+    @classmethod
+    def from_httplib(ResponseCls, r, **response_kw):
+        """
+        Given an :class:`httplib.HTTPResponse` instance ``r``, return a
+        corresponding :class:`urllib3.response.HTTPResponse` object.
+
+        Remaining parameters are passed to the HTTPResponse constructor, along
+        with ``original_response=r``.
+        """
+        headers = r.msg
+
+        if not isinstance(headers, HTTPHeaderDict):
+            if PY3:
+                headers = HTTPHeaderDict(headers.items())
+            else:
+                # Python 2.7
+                headers = HTTPHeaderDict.from_httplib(headers)
+
+        # HTTPResponse objects in Python 3 don't have a .strict attribute
+        strict = getattr(r, "strict", 0)
+        resp = ResponseCls(
+            body=r,
+            headers=headers,
+            status=r.status,
+            version=r.version,
+            reason=r.reason,
+            strict=strict,
+            original_response=r,
+            **response_kw
+        )
+        return resp
+
+    # Backwards-compatibility methods for httplib.HTTPResponse
+    def getheaders(self):
+        return self.headers
+
+    def getheader(self, name, default=None):
+        return self.headers.get(name, default)
+
+    # Backwards compatibility for http.cookiejar
+    def info(self):
+        return self.headers
+
+    # Overrides from io.IOBase
+    def close(self):
+        if not self.closed:
+            self._fp.close()
+
+        if self._connection:
+            self._connection.close()
+
+        if not self.auto_close:
+            io.IOBase.close(self)
+
+    @property
+    def closed(self):
+        if not self.auto_close:
+            return io.IOBase.closed.__get__(self)
+        elif self._fp is None:
+            return True
+        elif hasattr(self._fp, "isclosed"):
+            return self._fp.isclosed()
+        elif hasattr(self._fp, "closed"):
+            return self._fp.closed
+        else:
+            return True
+
+    def fileno(self):
+        if self._fp is None:
+            raise IOError("HTTPResponse has no file to get a fileno from")
+        elif hasattr(self._fp, "fileno"):
+            return self._fp.fileno()
+        else:
+            raise IOError(
+                "The file-like object this HTTPResponse is wrapped "
+                "around has no file descriptor"
+            )
+
+    def flush(self):
+        if (
+            self._fp is not None
+            and hasattr(self._fp, "flush")
+            and not getattr(self._fp, "closed", False)
+        ):
+            return self._fp.flush()
+
+    def readable(self):
+        # This method is required for `io` module compatibility.
+        return True
+
+    def readinto(self, b):
+        # This method is required for `io` module compatibility.
+        temp = self.read(len(b))
+        if len(temp) == 0:
+            return 0
+        else:
+            b[: len(temp)] = temp
+            return len(temp)
+
+    def supports_chunked_reads(self):
+        """
+        Checks if the underlying file-like object looks like a
+        httplib.HTTPResponse object. We do this by testing for the fp
+        attribute. If it is present we assume it returns raw chunks as
+        processed by read_chunked().
+        """
+        return hasattr(self._fp, "fp")
+
+    def _update_chunk_length(self):
+        # First, we'll figure out length of a chunk and then
+        # we'll try to read it from socket.
+        if self.chunk_left is not None:
+            return
+        line = self._fp.fp.readline()
+        line = line.split(b";", 1)[0]
+        try:
+            self.chunk_left = int(line, 16)
+        except ValueError:
+            # Invalid chunked protocol response, abort.
+            self.close()
+            raise httplib.IncompleteRead(line)
+
+    def _handle_chunk(self, amt):
+        returned_chunk = None
+        if amt is None:
+            chunk = self._fp._safe_read(self.chunk_left)
+            returned_chunk = chunk
+            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
+            self.chunk_left = None
+        elif amt < self.chunk_left:
+            value = self._fp._safe_read(amt)
+            self.chunk_left = self.chunk_left - amt
+            returned_chunk = value
+        elif amt == self.chunk_left:
+            value = self._fp._safe_read(amt)
+            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
+            self.chunk_left = None
+            returned_chunk = value
+        else:  # amt > self.chunk_left
+            returned_chunk = self._fp._safe_read(self.chunk_left)
+            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
+            self.chunk_left = None
+        return returned_chunk
+
+    def read_chunked(self, amt=None, decode_content=None):
+        """
+        Similar to :meth:`HTTPResponse.read`, but with an additional
+        parameter: ``decode_content``.
+
+        :param amt:
+            How much of the content to read. If specified, caching is skipped
+            because it doesn't make sense to cache partial content as the full
+            response.
+
+        :param decode_content:
+            If True, will attempt to decode the body based on the
+            'content-encoding' header.
+        """
+        self._init_decoder()
+        # FIXME: Rewrite this method and make it a class with a better structured logic.
+        if not self.chunked:
+            raise ResponseNotChunked(
+                "Response is not chunked. "
+                "Header 'transfer-encoding: chunked' is missing."
+            )
+        if not self.supports_chunked_reads():
+            raise BodyNotHttplibCompatible(
+                "Body should be httplib.HTTPResponse like. "
+                "It should have have an fp attribute which returns raw chunks."
+            )
+
+        with self._error_catcher():
+            # Don't bother reading the body of a HEAD request.
+            if self._original_response and is_response_to_head(self._original_response):
+                self._original_response.close()
+                return
+
+            # If a response is already read and closed
+            # then return immediately.
+            if self._fp.fp is None:
+                return
+
+            while True:
+                self._update_chunk_length()
+                if self.chunk_left == 0:
+                    break
+                chunk = self._handle_chunk(amt)
+                decoded = self._decode(
+                    chunk, decode_content=decode_content, flush_decoder=False
+                )
+                if decoded:
+                    yield decoded
+
+            if decode_content:
+                # On CPython and PyPy, we should never need to flush the
+                # decoder. However, on Jython we *might* need to, so
+                # lets defensively do it anyway.
+                decoded = self._flush_decoder()
+                if decoded:  # Platform-specific: Jython.
+                    yield decoded
+
+            # Chunk content ends with \r\n: discard it.
+            while True:
+                line = self._fp.fp.readline()
+                if not line:
+                    # Some sites may not end with '\r\n'.
+                    break
+                if line == b"\r\n":
+                    break
+
+            # We read everything; close the "file".
+            if self._original_response:
+                self._original_response.close()
+
+    def geturl(self):
+        """
+        Returns the URL that was the source of this response.
+        If the request that generated this response redirected, this method
+        will return the final redirect location.
+        """
+        if self.retries is not None and len(self.retries.history):
+            return self.retries.history[-1].redirect_location
+        else:
+            return self._request_url
+
+    def __iter__(self):
+        buffer = []
+        for chunk in self.stream(decode_content=True):
+            if b"\n" in chunk:
+                chunk = chunk.split(b"\n")
+                yield b"".join(buffer) + chunk[0] + b"\n"
+                for x in chunk[1:-1]:
+                    yield x + b"\n"
+                if chunk[-1]:
+                    buffer = [chunk[-1]]
+                else:
+                    buffer = []
+            else:
+                buffer.append(chunk)
+        if buffer:
+            yield b"".join(buffer)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/__init__.py
new file mode 100644
index 0000000..a96c73a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/__init__.py
@@ -0,0 +1,46 @@
+from __future__ import absolute_import
+
+# For backwards compatibility, provide imports that used to be here.
+from .connection import is_connection_dropped
+from .request import make_headers
+from .response import is_fp_closed
+from .ssl_ import (
+    SSLContext,
+    HAS_SNI,
+    IS_PYOPENSSL,
+    IS_SECURETRANSPORT,
+    assert_fingerprint,
+    resolve_cert_reqs,
+    resolve_ssl_version,
+    ssl_wrap_socket,
+    PROTOCOL_TLS,
+)
+from .timeout import current_time, Timeout
+
+from .retry import Retry
+from .url import get_host, parse_url, split_first, Url
+from .wait import wait_for_read, wait_for_write
+
+__all__ = (
+    "HAS_SNI",
+    "IS_PYOPENSSL",
+    "IS_SECURETRANSPORT",
+    "SSLContext",
+    "PROTOCOL_TLS",
+    "Retry",
+    "Timeout",
+    "Url",
+    "assert_fingerprint",
+    "current_time",
+    "is_connection_dropped",
+    "is_fp_closed",
+    "get_host",
+    "parse_url",
+    "make_headers",
+    "resolve_cert_reqs",
+    "resolve_ssl_version",
+    "split_first",
+    "ssl_wrap_socket",
+    "wait_for_read",
+    "wait_for_write",
+)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/connection.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/connection.py
new file mode 100644
index 0000000..86f0a3b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/connection.py
@@ -0,0 +1,138 @@
+from __future__ import absolute_import
+import socket
+from .wait import NoWayToWaitForSocketError, wait_for_read
+from ..contrib import _appengine_environ
+
+
+def is_connection_dropped(conn):  # Platform-specific
+    """
+    Returns True if the connection is dropped and should be closed.
+
+    :param conn:
+        :class:`httplib.HTTPConnection` object.
+
+    Note: For platforms like AppEngine, this will always return ``False`` to
+    let the platform handle connection recycling transparently for us.
+    """
+    sock = getattr(conn, "sock", False)
+    if sock is False:  # Platform-specific: AppEngine
+        return False
+    if sock is None:  # Connection already closed (such as by httplib).
+        return True
+    try:
+        # Returns True if readable, which here means it's been dropped
+        return wait_for_read(sock, timeout=0.0)
+    except NoWayToWaitForSocketError:  # Platform-specific: AppEngine
+        return False
+
+
+# This function is copied from socket.py in the Python 2.7 standard
+# library test suite. Added to its signature is only `socket_options`.
+# One additional modification is that we avoid binding to IPv6 servers
+# discovered in DNS if the system doesn't have IPv6 functionality.
+def create_connection(
+    address,
+    timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
+    source_address=None,
+    socket_options=None,
+):
+    """Connect to *address* and return the socket object.
+
+    Convenience function.  Connect to *address* (a 2-tuple ``(host,
+    port)``) and return the socket object.  Passing the optional
+    *timeout* parameter will set the timeout on the socket instance
+    before attempting to connect.  If no *timeout* is supplied, the
+    global default timeout setting returned by :func:`getdefaulttimeout`
+    is used.  If *source_address* is set it must be a tuple of (host, port)
+    for the socket to bind as a source address before making the connection.
+    An host of '' or port 0 tells the OS to use the default.
+    """
+
+    host, port = address
+    if host.startswith("["):
+        host = host.strip("[]")
+    err = None
+
+    # Using the value from allowed_gai_family() in the context of getaddrinfo lets
+    # us select whether to work with IPv4 DNS records, IPv6 records, or both.
+    # The original create_connection function always returns all records.
+    family = allowed_gai_family()
+
+    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
+        af, socktype, proto, canonname, sa = res
+        sock = None
+        try:
+            sock = socket.socket(af, socktype, proto)
+
+            # If provided, set socket level options before connecting.
+            _set_socket_options(sock, socket_options)
+
+            if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
+                sock.settimeout(timeout)
+            if source_address:
+                sock.bind(source_address)
+            sock.connect(sa)
+            return sock
+
+        except socket.error as e:
+            err = e
+            if sock is not None:
+                sock.close()
+                sock = None
+
+    if err is not None:
+        raise err
+
+    raise socket.error("getaddrinfo returns an empty list")
+
+
+def _set_socket_options(sock, options):
+    if options is None:
+        return
+
+    for opt in options:
+        sock.setsockopt(*opt)
+
+
+def allowed_gai_family():
+    """This function is designed to work in the context of
+    getaddrinfo, where family=socket.AF_UNSPEC is the default and
+    will perform a DNS search for both IPv6 and IPv4 records."""
+
+    family = socket.AF_INET
+    if HAS_IPV6:
+        family = socket.AF_UNSPEC
+    return family
+
+
+def _has_ipv6(host):
+    """ Returns True if the system can bind an IPv6 address. """
+    sock = None
+    has_ipv6 = False
+
+    # App Engine doesn't support IPV6 sockets and actually has a quota on the
+    # number of sockets that can be used, so just early out here instead of
+    # creating a socket needlessly.
+    # See https://github.com/urllib3/urllib3/issues/1446
+    if _appengine_environ.is_appengine_sandbox():
+        return False
+
+    if socket.has_ipv6:
+        # has_ipv6 returns true if cPython was compiled with IPv6 support.
+        # It does not tell us if the system has IPv6 support enabled. To
+        # determine that we must bind to an IPv6 address.
+        # https://github.com/urllib3/urllib3/pull/611
+        # https://bugs.python.org/issue658327
+        try:
+            sock = socket.socket(socket.AF_INET6)
+            sock.bind((host, 0))
+            has_ipv6 = True
+        except Exception:
+            pass
+
+    if sock:
+        sock.close()
+    return has_ipv6
+
+
+HAS_IPV6 = _has_ipv6("::1")
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/queue.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/queue.py
new file mode 100644
index 0000000..d3d379a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/queue.py
@@ -0,0 +1,21 @@
+import collections
+from ..packages import six
+from ..packages.six.moves import queue
+
+if six.PY2:
+    # Queue is imported for side effects on MS Windows. See issue #229.
+    import Queue as _unused_module_Queue  # noqa: F401
+
+
+class LifoQueue(queue.Queue):
+    def _init(self, _):
+        self.queue = collections.deque()
+
+    def _qsize(self, len=len):
+        return len(self.queue)
+
+    def _put(self, item):
+        self.queue.append(item)
+
+    def _get(self):
+        return self.queue.pop()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/request.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/request.py
new file mode 100644
index 0000000..3b7bb54
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/request.py
@@ -0,0 +1,135 @@
+from __future__ import absolute_import
+from base64 import b64encode
+
+from ..packages.six import b, integer_types
+from ..exceptions import UnrewindableBodyError
+
+ACCEPT_ENCODING = "gzip,deflate"
+try:
+    import brotli as _unused_module_brotli  # noqa: F401
+except ImportError:
+    pass
+else:
+    ACCEPT_ENCODING += ",br"
+
+_FAILEDTELL = object()
+
+
+def make_headers(
+    keep_alive=None,
+    accept_encoding=None,
+    user_agent=None,
+    basic_auth=None,
+    proxy_basic_auth=None,
+    disable_cache=None,
+):
+    """
+    Shortcuts for generating request headers.
+
+    :param keep_alive:
+        If ``True``, adds 'connection: keep-alive' header.
+
+    :param accept_encoding:
+        Can be a boolean, list, or string.
+        ``True`` translates to 'gzip,deflate'.
+        List will get joined by comma.
+        String will be used as provided.
+
+    :param user_agent:
+        String representing the user-agent you want, such as
+        "python-urllib3/0.6"
+
+    :param basic_auth:
+        Colon-separated username:password string for 'authorization: basic ...'
+        auth header.
+
+    :param proxy_basic_auth:
+        Colon-separated username:password string for 'proxy-authorization: basic ...'
+        auth header.
+
+    :param disable_cache:
+        If ``True``, adds 'cache-control: no-cache' header.
+
+    Example::
+
+        >>> make_headers(keep_alive=True, user_agent="Batman/1.0")
+        {'connection': 'keep-alive', 'user-agent': 'Batman/1.0'}
+        >>> make_headers(accept_encoding=True)
+        {'accept-encoding': 'gzip,deflate'}
+    """
+    headers = {}
+    if accept_encoding:
+        if isinstance(accept_encoding, str):
+            pass
+        elif isinstance(accept_encoding, list):
+            accept_encoding = ",".join(accept_encoding)
+        else:
+            accept_encoding = ACCEPT_ENCODING
+        headers["accept-encoding"] = accept_encoding
+
+    if user_agent:
+        headers["user-agent"] = user_agent
+
+    if keep_alive:
+        headers["connection"] = "keep-alive"
+
+    if basic_auth:
+        headers["authorization"] = "Basic " + b64encode(b(basic_auth)).decode("utf-8")
+
+    if proxy_basic_auth:
+        headers["proxy-authorization"] = "Basic " + b64encode(
+            b(proxy_basic_auth)
+        ).decode("utf-8")
+
+    if disable_cache:
+        headers["cache-control"] = "no-cache"
+
+    return headers
+
+
+def set_file_position(body, pos):
+    """
+    If a position is provided, move file to that point.
+    Otherwise, we'll attempt to record a position for future use.
+    """
+    if pos is not None:
+        rewind_body(body, pos)
+    elif getattr(body, "tell", None) is not None:
+        try:
+            pos = body.tell()
+        except (IOError, OSError):
+            # This differentiates from None, allowing us to catch
+            # a failed `tell()` later when trying to rewind the body.
+            pos = _FAILEDTELL
+
+    return pos
+
+
+def rewind_body(body, body_pos):
+    """
+    Attempt to rewind body to a certain position.
+    Primarily used for request redirects and retries.
+
+    :param body:
+        File-like object that supports seek.
+
+    :param int pos:
+        Position to seek to in file.
+    """
+    body_seek = getattr(body, "seek", None)
+    if body_seek is not None and isinstance(body_pos, integer_types):
+        try:
+            body_seek(body_pos)
+        except (IOError, OSError):
+            raise UnrewindableBodyError(
+                "An error occurred when rewinding request body for redirect/retry."
+            )
+    elif body_pos is _FAILEDTELL:
+        raise UnrewindableBodyError(
+            "Unable to record file position for rewinding "
+            "request body during a redirect/retry."
+        )
+    else:
+        raise ValueError(
+            "body_pos must be of type integer, instead it was %s." % type(body_pos)
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/response.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/response.py
new file mode 100644
index 0000000..715868d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/response.py
@@ -0,0 +1,86 @@
+from __future__ import absolute_import
+from ..packages.six.moves import http_client as httplib
+
+from ..exceptions import HeaderParsingError
+
+
+def is_fp_closed(obj):
+    """
+    Checks whether a given file-like object is closed.
+
+    :param obj:
+        The file-like object to check.
+    """
+
+    try:
+        # Check `isclosed()` first, in case Python3 doesn't set `closed`.
+        # GH Issue #928
+        return obj.isclosed()
+    except AttributeError:
+        pass
+
+    try:
+        # Check via the official file-like-object way.
+        return obj.closed
+    except AttributeError:
+        pass
+
+    try:
+        # Check if the object is a container for another file-like object that
+        # gets released on exhaustion (e.g. HTTPResponse).
+        return obj.fp is None
+    except AttributeError:
+        pass
+
+    raise ValueError("Unable to determine whether fp is closed.")
+
+
+def assert_header_parsing(headers):
+    """
+    Asserts whether all headers have been successfully parsed.
+    Extracts encountered errors from the result of parsing headers.
+
+    Only works on Python 3.
+
+    :param headers: Headers to verify.
+    :type headers: `httplib.HTTPMessage`.
+
+    :raises urllib3.exceptions.HeaderParsingError:
+        If parsing errors are found.
+    """
+
+    # This will fail silently if we pass in the wrong kind of parameter.
+    # To make debugging easier add an explicit check.
+    if not isinstance(headers, httplib.HTTPMessage):
+        raise TypeError("expected httplib.Message, got {0}.".format(type(headers)))
+
+    defects = getattr(headers, "defects", None)
+    get_payload = getattr(headers, "get_payload", None)
+
+    unparsed_data = None
+    if get_payload:
+        # get_payload is actually email.message.Message.get_payload;
+        # we're only interested in the result if it's not a multipart message
+        if not headers.is_multipart():
+            payload = get_payload()
+
+            if isinstance(payload, (bytes, str)):
+                unparsed_data = payload
+
+    if defects or unparsed_data:
+        raise HeaderParsingError(defects=defects, unparsed_data=unparsed_data)
+
+
+def is_response_to_head(response):
+    """
+    Checks whether the request of a response has been a HEAD-request.
+    Handles the quirks of AppEngine.
+
+    :param conn:
+    :type conn: :class:`httplib.HTTPResponse`
+    """
+    # FIXME: Can we do this somehow without accessing private httplib _method?
+    method = response._method
+    if isinstance(method, int):  # Platform-specific: Appengine
+        return method == 3
+    return method.upper() == "HEAD"
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/retry.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/retry.py
new file mode 100644
index 0000000..ee30c91
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/retry.py
@@ -0,0 +1,453 @@
+from __future__ import absolute_import
+import time
+import logging
+from collections import namedtuple
+from itertools import takewhile
+import email
+import re
+
+from ..exceptions import (
+    ConnectTimeoutError,
+    MaxRetryError,
+    ProtocolError,
+    ReadTimeoutError,
+    ResponseError,
+    InvalidHeader,
+    ProxyError,
+)
+from ..packages import six
+
+
+log = logging.getLogger(__name__)
+
+
+# Data structure for representing the metadata of requests that result in a retry.
+RequestHistory = namedtuple(
+    "RequestHistory", ["method", "url", "error", "status", "redirect_location"]
+)
+
+
+class Retry(object):
+    """ Retry configuration.
+
+    Each retry attempt will create a new Retry object with updated values, so
+    they can be safely reused.
+
+    Retries can be defined as a default for a pool::
+
+        retries = Retry(connect=5, read=2, redirect=5)
+        http = PoolManager(retries=retries)
+        response = http.request('GET', 'http://example.com/')
+
+    Or per-request (which overrides the default for the pool)::
+
+        response = http.request('GET', 'http://example.com/', retries=Retry(10))
+
+    Retries can be disabled by passing ``False``::
+
+        response = http.request('GET', 'http://example.com/', retries=False)
+
+    Errors will be wrapped in :class:`~urllib3.exceptions.MaxRetryError` unless
+    retries are disabled, in which case the causing exception will be raised.
+
+    :param int total:
+        Total number of retries to allow. Takes precedence over other counts.
+
+        Set to ``None`` to remove this constraint and fall back on other
+        counts. It's a good idea to set this to some sensibly-high value to
+        account for unexpected edge cases and avoid infinite retry loops.
+
+        Set to ``0`` to fail on the first retry.
+
+        Set to ``False`` to disable and imply ``raise_on_redirect=False``.
+
+    :param int connect:
+        How many connection-related errors to retry on.
+
+        These are errors raised before the request is sent to the remote server,
+        which we assume has not triggered the server to process the request.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+    :param int read:
+        How many times to retry on read errors.
+
+        These errors are raised after the request was sent to the server, so the
+        request may have side-effects.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+    :param int redirect:
+        How many redirects to perform. Limit this to avoid infinite redirect
+        loops.
+
+        A redirect is a HTTP response with a status code 301, 302, 303, 307 or
+        308.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+        Set to ``False`` to disable and imply ``raise_on_redirect=False``.
+
+    :param int status:
+        How many times to retry on bad status codes.
+
+        These are retries made on responses, where status code matches
+        ``status_forcelist``.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+    :param iterable method_whitelist:
+        Set of uppercased HTTP method verbs that we should retry on.
+
+        By default, we only retry on methods which are considered to be
+        idempotent (multiple requests with the same parameters end with the
+        same state). See :attr:`Retry.DEFAULT_METHOD_WHITELIST`.
+
+        Set to a ``False`` value to retry on any verb.
+
+    :param iterable status_forcelist:
+        A set of integer HTTP status codes that we should force a retry on.
+        A retry is initiated if the request method is in ``method_whitelist``
+        and the response status code is in ``status_forcelist``.
+
+        By default, this is disabled with ``None``.
+
+    :param float backoff_factor:
+        A backoff factor to apply between attempts after the second try
+        (most errors are resolved immediately by a second try without a
+        delay). urllib3 will sleep for::
+
+            {backoff factor} * (2 ** ({number of total retries} - 1))
+
+        seconds. If the backoff_factor is 0.1, then :func:`.sleep` will sleep
+        for [0.0s, 0.2s, 0.4s, ...] between retries. It will never be longer
+        than :attr:`Retry.BACKOFF_MAX`.
+
+        By default, backoff is disabled (set to 0).
+
+    :param bool raise_on_redirect: Whether, if the number of redirects is
+        exhausted, to raise a MaxRetryError, or to return a response with a
+        response code in the 3xx range.
+
+    :param bool raise_on_status: Similar meaning to ``raise_on_redirect``:
+        whether we should raise an exception, or return a response,
+        if status falls in ``status_forcelist`` range and retries have
+        been exhausted.
+
+    :param tuple history: The history of the request encountered during
+        each call to :meth:`~Retry.increment`. The list is in the order
+        the requests occurred. Each list item is of class :class:`RequestHistory`.
+
+    :param bool respect_retry_after_header:
+        Whether to respect Retry-After header on status codes defined as
+        :attr:`Retry.RETRY_AFTER_STATUS_CODES` or not.
+
+    :param iterable remove_headers_on_redirect:
+        Sequence of headers to remove from the request when a response
+        indicating a redirect is returned before firing off the redirected
+        request.
+    """
+
+    DEFAULT_METHOD_WHITELIST = frozenset(
+        ["HEAD", "GET", "PUT", "DELETE", "OPTIONS", "TRACE"]
+    )
+
+    RETRY_AFTER_STATUS_CODES = frozenset([413, 429, 503])
+
+    DEFAULT_REDIRECT_HEADERS_BLACKLIST = frozenset(["Authorization"])
+
+    #: Maximum backoff time.
+    BACKOFF_MAX = 120
+
+    def __init__(
+        self,
+        total=10,
+        connect=None,
+        read=None,
+        redirect=None,
+        status=None,
+        method_whitelist=DEFAULT_METHOD_WHITELIST,
+        status_forcelist=None,
+        backoff_factor=0,
+        raise_on_redirect=True,
+        raise_on_status=True,
+        history=None,
+        respect_retry_after_header=True,
+        remove_headers_on_redirect=DEFAULT_REDIRECT_HEADERS_BLACKLIST,
+    ):
+
+        self.total = total
+        self.connect = connect
+        self.read = read
+        self.status = status
+
+        if redirect is False or total is False:
+            redirect = 0
+            raise_on_redirect = False
+
+        self.redirect = redirect
+        self.status_forcelist = status_forcelist or set()
+        self.method_whitelist = method_whitelist
+        self.backoff_factor = backoff_factor
+        self.raise_on_redirect = raise_on_redirect
+        self.raise_on_status = raise_on_status
+        self.history = history or tuple()
+        self.respect_retry_after_header = respect_retry_after_header
+        self.remove_headers_on_redirect = frozenset(
+            [h.lower() for h in remove_headers_on_redirect]
+        )
+
+    def new(self, **kw):
+        params = dict(
+            total=self.total,
+            connect=self.connect,
+            read=self.read,
+            redirect=self.redirect,
+            status=self.status,
+            method_whitelist=self.method_whitelist,
+            status_forcelist=self.status_forcelist,
+            backoff_factor=self.backoff_factor,
+            raise_on_redirect=self.raise_on_redirect,
+            raise_on_status=self.raise_on_status,
+            history=self.history,
+            remove_headers_on_redirect=self.remove_headers_on_redirect,
+            respect_retry_after_header=self.respect_retry_after_header,
+        )
+        params.update(kw)
+        return type(self)(**params)
+
+    @classmethod
+    def from_int(cls, retries, redirect=True, default=None):
+        """ Backwards-compatibility for the old retries format."""
+        if retries is None:
+            retries = default if default is not None else cls.DEFAULT
+
+        if isinstance(retries, Retry):
+            return retries
+
+        redirect = bool(redirect) and None
+        new_retries = cls(retries, redirect=redirect)
+        log.debug("Converted retries value: %r -> %r", retries, new_retries)
+        return new_retries
+
+    def get_backoff_time(self):
+        """ Formula for computing the current backoff
+
+        :rtype: float
+        """
+        # We want to consider only the last consecutive errors sequence (Ignore redirects).
+        consecutive_errors_len = len(
+            list(
+                takewhile(lambda x: x.redirect_location is None, reversed(self.history))
+            )
+        )
+        if consecutive_errors_len <= 1:
+            return 0
+
+        backoff_value = self.backoff_factor * (2 ** (consecutive_errors_len - 1))
+        return min(self.BACKOFF_MAX, backoff_value)
+
+    def parse_retry_after(self, retry_after):
+        # Whitespace: https://tools.ietf.org/html/rfc7230#section-3.2.4
+        if re.match(r"^\s*[0-9]+\s*$", retry_after):
+            seconds = int(retry_after)
+        else:
+            retry_date_tuple = email.utils.parsedate(retry_after)
+            if retry_date_tuple is None:
+                raise InvalidHeader("Invalid Retry-After header: %s" % retry_after)
+            retry_date = time.mktime(retry_date_tuple)
+            seconds = retry_date - time.time()
+
+        if seconds < 0:
+            seconds = 0
+
+        return seconds
+
+    def get_retry_after(self, response):
+        """ Get the value of Retry-After in seconds. """
+
+        retry_after = response.getheader("Retry-After")
+
+        if retry_after is None:
+            return None
+
+        return self.parse_retry_after(retry_after)
+
+    def sleep_for_retry(self, response=None):
+        retry_after = self.get_retry_after(response)
+        if retry_after:
+            time.sleep(retry_after)
+            return True
+
+        return False
+
+    def _sleep_backoff(self):
+        backoff = self.get_backoff_time()
+        if backoff <= 0:
+            return
+        time.sleep(backoff)
+
+    def sleep(self, response=None):
+        """ Sleep between retry attempts.
+
+        This method will respect a server's ``Retry-After`` response header
+        and sleep the duration of the time requested. If that is not present, it
+        will use an exponential backoff. By default, the backoff factor is 0 and
+        this method will return immediately.
+        """
+
+        if self.respect_retry_after_header and response:
+            slept = self.sleep_for_retry(response)
+            if slept:
+                return
+
+        self._sleep_backoff()
+
+    def _is_connection_error(self, err):
+        """ Errors when we're fairly sure that the server did not receive the
+        request, so it should be safe to retry.
+        """
+        if isinstance(err, ProxyError):
+            err = err.original_error
+        return isinstance(err, ConnectTimeoutError)
+
+    def _is_read_error(self, err):
+        """ Errors that occur after the request has been started, so we should
+        assume that the server began processing it.
+        """
+        return isinstance(err, (ReadTimeoutError, ProtocolError))
+
+    def _is_method_retryable(self, method):
+        """ Checks if a given HTTP method should be retried upon, depending if
+        it is included on the method whitelist.
+        """
+        if self.method_whitelist and method.upper() not in self.method_whitelist:
+            return False
+
+        return True
+
+    def is_retry(self, method, status_code, has_retry_after=False):
+        """ Is this method/status code retryable? (Based on whitelists and control
+        variables such as the number of total retries to allow, whether to
+        respect the Retry-After header, whether this header is present, and
+        whether the returned status code is on the list of status codes to
+        be retried upon on the presence of the aforementioned header)
+        """
+        if not self._is_method_retryable(method):
+            return False
+
+        if self.status_forcelist and status_code in self.status_forcelist:
+            return True
+
+        return (
+            self.total
+            and self.respect_retry_after_header
+            and has_retry_after
+            and (status_code in self.RETRY_AFTER_STATUS_CODES)
+        )
+
+    def is_exhausted(self):
+        """ Are we out of retries? """
+        retry_counts = (self.total, self.connect, self.read, self.redirect, self.status)
+        retry_counts = list(filter(None, retry_counts))
+        if not retry_counts:
+            return False
+
+        return min(retry_counts) < 0
+
+    def increment(
+        self,
+        method=None,
+        url=None,
+        response=None,
+        error=None,
+        _pool=None,
+        _stacktrace=None,
+    ):
+        """ Return a new Retry object with incremented retry counters.
+
+        :param response: A response object, or None, if the server did not
+            return a response.
+        :type response: :class:`~urllib3.response.HTTPResponse`
+        :param Exception error: An error encountered during the request, or
+            None if the response was received successfully.
+
+        :return: A new ``Retry`` object.
+        """
+        if self.total is False and error:
+            # Disabled, indicate to re-raise the error.
+            raise six.reraise(type(error), error, _stacktrace)
+
+        total = self.total
+        if total is not None:
+            total -= 1
+
+        connect = self.connect
+        read = self.read
+        redirect = self.redirect
+        status_count = self.status
+        cause = "unknown"
+        status = None
+        redirect_location = None
+
+        if error and self._is_connection_error(error):
+            # Connect retry?
+            if connect is False:
+                raise six.reraise(type(error), error, _stacktrace)
+            elif connect is not None:
+                connect -= 1
+
+        elif error and self._is_read_error(error):
+            # Read retry?
+            if read is False or not self._is_method_retryable(method):
+                raise six.reraise(type(error), error, _stacktrace)
+            elif read is not None:
+                read -= 1
+
+        elif response and response.get_redirect_location():
+            # Redirect retry?
+            if redirect is not None:
+                redirect -= 1
+            cause = "too many redirects"
+            redirect_location = response.get_redirect_location()
+            status = response.status
+
+        else:
+            # Incrementing because of a server error like a 500 in
+            # status_forcelist and a the given method is in the whitelist
+            cause = ResponseError.GENERIC_ERROR
+            if response and response.status:
+                if status_count is not None:
+                    status_count -= 1
+                cause = ResponseError.SPECIFIC_ERROR.format(status_code=response.status)
+                status = response.status
+
+        history = self.history + (
+            RequestHistory(method, url, error, status, redirect_location),
+        )
+
+        new_retry = self.new(
+            total=total,
+            connect=connect,
+            read=read,
+            redirect=redirect,
+            status=status_count,
+            history=history,
+        )
+
+        if new_retry.is_exhausted():
+            raise MaxRetryError(_pool, url, error or ResponseError(cause))
+
+        log.debug("Incremented Retry for (url='%s'): %r", url, new_retry)
+
+        return new_retry
+
+    def __repr__(self):
+        return (
+            "{cls.__name__}(total={self.total}, connect={self.connect}, "
+            "read={self.read}, redirect={self.redirect}, status={self.status})"
+        ).format(cls=type(self), self=self)
+
+
+# For backwards compatibility (equivalent to pre-v1.9):
+Retry.DEFAULT = Retry(3)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/ssl_.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/ssl_.py
new file mode 100644
index 0000000..d3b463d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/ssl_.py
@@ -0,0 +1,414 @@
+from __future__ import absolute_import
+import errno
+import warnings
+import hmac
+import sys
+
+from binascii import hexlify, unhexlify
+from hashlib import md5, sha1, sha256
+
+from .url import IPV4_RE, BRACELESS_IPV6_ADDRZ_RE
+from ..exceptions import SSLError, InsecurePlatformWarning, SNIMissingWarning
+from ..packages import six
+
+
+SSLContext = None
+HAS_SNI = False
+IS_PYOPENSSL = False
+IS_SECURETRANSPORT = False
+
+# Maps the length of a digest to a possible hash function producing this digest
+HASHFUNC_MAP = {32: md5, 40: sha1, 64: sha256}
+
+
+def _const_compare_digest_backport(a, b):
+    """
+    Compare two digests of equal length in constant time.
+
+    The digests must be of type str/bytes.
+    Returns True if the digests match, and False otherwise.
+    """
+    result = abs(len(a) - len(b))
+    for l, r in zip(bytearray(a), bytearray(b)):
+        result |= l ^ r
+    return result == 0
+
+
+_const_compare_digest = getattr(hmac, "compare_digest", _const_compare_digest_backport)
+
+try:  # Test for SSL features
+    import ssl
+    from ssl import wrap_socket, CERT_REQUIRED
+    from ssl import HAS_SNI  # Has SNI?
+except ImportError:
+    pass
+
+try:  # Platform-specific: Python 3.6
+    from ssl import PROTOCOL_TLS
+
+    PROTOCOL_SSLv23 = PROTOCOL_TLS
+except ImportError:
+    try:
+        from ssl import PROTOCOL_SSLv23 as PROTOCOL_TLS
+
+        PROTOCOL_SSLv23 = PROTOCOL_TLS
+    except ImportError:
+        PROTOCOL_SSLv23 = PROTOCOL_TLS = 2
+
+
+try:
+    from ssl import OP_NO_SSLv2, OP_NO_SSLv3, OP_NO_COMPRESSION
+except ImportError:
+    OP_NO_SSLv2, OP_NO_SSLv3 = 0x1000000, 0x2000000
+    OP_NO_COMPRESSION = 0x20000
+
+
+# A secure default.
+# Sources for more information on TLS ciphers:
+#
+# - https://wiki.mozilla.org/Security/Server_Side_TLS
+# - https://www.ssllabs.com/projects/best-practices/index.html
+# - https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
+#
+# The general intent is:
+# - prefer cipher suites that offer perfect forward secrecy (DHE/ECDHE),
+# - prefer ECDHE over DHE for better performance,
+# - prefer any AES-GCM and ChaCha20 over any AES-CBC for better performance and
+#   security,
+# - prefer AES-GCM over ChaCha20 because hardware-accelerated AES is common,
+# - disable NULL authentication, MD5 MACs, DSS, and other
+#   insecure ciphers for security reasons.
+# - NOTE: TLS 1.3 cipher suites are managed through a different interface
+#   not exposed by CPython (yet!) and are enabled by default if they're available.
+DEFAULT_CIPHERS = ":".join(
+    [
+        "ECDHE+AESGCM",
+        "ECDHE+CHACHA20",
+        "DHE+AESGCM",
+        "DHE+CHACHA20",
+        "ECDH+AESGCM",
+        "DH+AESGCM",
+        "ECDH+AES",
+        "DH+AES",
+        "RSA+AESGCM",
+        "RSA+AES",
+        "!aNULL",
+        "!eNULL",
+        "!MD5",
+        "!DSS",
+    ]
+)
+
+try:
+    from ssl import SSLContext  # Modern SSL?
+except ImportError:
+
+    class SSLContext(object):  # Platform-specific: Python 2
+        def __init__(self, protocol_version):
+            self.protocol = protocol_version
+            # Use default values from a real SSLContext
+            self.check_hostname = False
+            self.verify_mode = ssl.CERT_NONE
+            self.ca_certs = None
+            self.options = 0
+            self.certfile = None
+            self.keyfile = None
+            self.ciphers = None
+
+        def load_cert_chain(self, certfile, keyfile):
+            self.certfile = certfile
+            self.keyfile = keyfile
+
+        def load_verify_locations(self, cafile=None, capath=None, cadata=None):
+            self.ca_certs = cafile
+
+            if capath is not None:
+                raise SSLError("CA directories not supported in older Pythons")
+
+            if cadata is not None:
+                raise SSLError("CA data not supported in older Pythons")
+
+        def set_ciphers(self, cipher_suite):
+            self.ciphers = cipher_suite
+
+        def wrap_socket(self, socket, server_hostname=None, server_side=False):
+            warnings.warn(
+                "A true SSLContext object is not available. This prevents "
+                "urllib3 from configuring SSL appropriately and may cause "
+                "certain SSL connections to fail. You can upgrade to a newer "
+                "version of Python to solve this. For more information, see "
+                "https://urllib3.readthedocs.io/en/latest/advanced-usage.html"
+                "#ssl-warnings",
+                InsecurePlatformWarning,
+            )
+            kwargs = {
+                "keyfile": self.keyfile,
+                "certfile": self.certfile,
+                "ca_certs": self.ca_certs,
+                "cert_reqs": self.verify_mode,
+                "ssl_version": self.protocol,
+                "server_side": server_side,
+            }
+            return wrap_socket(socket, ciphers=self.ciphers, **kwargs)
+
+
+def assert_fingerprint(cert, fingerprint):
+    """
+    Checks if given fingerprint matches the supplied certificate.
+
+    :param cert:
+        Certificate as bytes object.
+    :param fingerprint:
+        Fingerprint as string of hexdigits, can be interspersed by colons.
+    """
+
+    fingerprint = fingerprint.replace(":", "").lower()
+    digest_length = len(fingerprint)
+    hashfunc = HASHFUNC_MAP.get(digest_length)
+    if not hashfunc:
+        raise SSLError("Fingerprint of invalid length: {0}".format(fingerprint))
+
+    # We need encode() here for py32; works on py2 and p33.
+    fingerprint_bytes = unhexlify(fingerprint.encode())
+
+    cert_digest = hashfunc(cert).digest()
+
+    if not _const_compare_digest(cert_digest, fingerprint_bytes):
+        raise SSLError(
+            'Fingerprints did not match. Expected "{0}", got "{1}".'.format(
+                fingerprint, hexlify(cert_digest)
+            )
+        )
+
+
+def resolve_cert_reqs(candidate):
+    """
+    Resolves the argument to a numeric constant, which can be passed to
+    the wrap_socket function/method from the ssl module.
+    Defaults to :data:`ssl.CERT_REQUIRED`.
+    If given a string it is assumed to be the name of the constant in the
+    :mod:`ssl` module or its abbreviation.
+    (So you can specify `REQUIRED` instead of `CERT_REQUIRED`.
+    If it's neither `None` nor a string we assume it is already the numeric
+    constant which can directly be passed to wrap_socket.
+    """
+    if candidate is None:
+        return CERT_REQUIRED
+
+    if isinstance(candidate, str):
+        res = getattr(ssl, candidate, None)
+        if res is None:
+            res = getattr(ssl, "CERT_" + candidate)
+        return res
+
+    return candidate
+
+
+def resolve_ssl_version(candidate):
+    """
+    like resolve_cert_reqs
+    """
+    if candidate is None:
+        return PROTOCOL_TLS
+
+    if isinstance(candidate, str):
+        res = getattr(ssl, candidate, None)
+        if res is None:
+            res = getattr(ssl, "PROTOCOL_" + candidate)
+        return res
+
+    return candidate
+
+
+def create_urllib3_context(
+    ssl_version=None, cert_reqs=None, options=None, ciphers=None
+):
+    """All arguments have the same meaning as ``ssl_wrap_socket``.
+
+    By default, this function does a lot of the same work that
+    ``ssl.create_default_context`` does on Python 3.4+. It:
+
+    - Disables SSLv2, SSLv3, and compression
+    - Sets a restricted set of server ciphers
+
+    If you wish to enable SSLv3, you can do::
+
+        from pip._vendor.urllib3.util import ssl_
+        context = ssl_.create_urllib3_context()
+        context.options &= ~ssl_.OP_NO_SSLv3
+
+    You can do the same to enable compression (substituting ``COMPRESSION``
+    for ``SSLv3`` in the last line above).
+
+    :param ssl_version:
+        The desired protocol version to use. This will default to
+        PROTOCOL_SSLv23 which will negotiate the highest protocol that both
+        the server and your installation of OpenSSL support.
+    :param cert_reqs:
+        Whether to require the certificate verification. This defaults to
+        ``ssl.CERT_REQUIRED``.
+    :param options:
+        Specific OpenSSL options. These default to ``ssl.OP_NO_SSLv2``,
+        ``ssl.OP_NO_SSLv3``, ``ssl.OP_NO_COMPRESSION``.
+    :param ciphers:
+        Which cipher suites to allow the server to select.
+    :returns:
+        Constructed SSLContext object with specified options
+    :rtype: SSLContext
+    """
+    context = SSLContext(ssl_version or PROTOCOL_TLS)
+
+    context.set_ciphers(ciphers or DEFAULT_CIPHERS)
+
+    # Setting the default here, as we may have no ssl module on import
+    cert_reqs = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
+
+    if options is None:
+        options = 0
+        # SSLv2 is easily broken and is considered harmful and dangerous
+        options |= OP_NO_SSLv2
+        # SSLv3 has several problems and is now dangerous
+        options |= OP_NO_SSLv3
+        # Disable compression to prevent CRIME attacks for OpenSSL 1.0+
+        # (issue #309)
+        options |= OP_NO_COMPRESSION
+
+    context.options |= options
+
+    # Enable post-handshake authentication for TLS 1.3, see GH #1634. PHA is
+    # necessary for conditional client cert authentication with TLS 1.3.
+    # The attribute is None for OpenSSL <= 1.1.0 or does not exist in older
+    # versions of Python.  We only enable on Python 3.7.4+ or if certificate
+    # verification is enabled to work around Python issue #37428
+    # See: https://bugs.python.org/issue37428
+    if (cert_reqs == ssl.CERT_REQUIRED or sys.version_info >= (3, 7, 4)) and getattr(
+        context, "post_handshake_auth", None
+    ) is not None:
+        context.post_handshake_auth = True
+
+    context.verify_mode = cert_reqs
+    if (
+        getattr(context, "check_hostname", None) is not None
+    ):  # Platform-specific: Python 3.2
+        # We do our own verification, including fingerprints and alternative
+        # hostnames. So disable it here
+        context.check_hostname = False
+    return context
+
+
+def ssl_wrap_socket(
+    sock,
+    keyfile=None,
+    certfile=None,
+    cert_reqs=None,
+    ca_certs=None,
+    server_hostname=None,
+    ssl_version=None,
+    ciphers=None,
+    ssl_context=None,
+    ca_cert_dir=None,
+    key_password=None,
+    ca_cert_data=None,
+):
+    """
+    All arguments except for server_hostname, ssl_context, and ca_cert_dir have
+    the same meaning as they do when using :func:`ssl.wrap_socket`.
+
+    :param server_hostname:
+        When SNI is supported, the expected hostname of the certificate
+    :param ssl_context:
+        A pre-made :class:`SSLContext` object. If none is provided, one will
+        be created using :func:`create_urllib3_context`.
+    :param ciphers:
+        A string of ciphers we wish the client to support.
+    :param ca_cert_dir:
+        A directory containing CA certificates in multiple separate files, as
+        supported by OpenSSL's -CApath flag or the capath argument to
+        SSLContext.load_verify_locations().
+    :param key_password:
+        Optional password if the keyfile is encrypted.
+    :param ca_cert_data:
+        Optional string containing CA certificates in PEM format suitable for
+        passing as the cadata parameter to SSLContext.load_verify_locations()
+    """
+    context = ssl_context
+    if context is None:
+        # Note: This branch of code and all the variables in it are no longer
+        # used by urllib3 itself. We should consider deprecating and removing
+        # this code.
+        context = create_urllib3_context(ssl_version, cert_reqs, ciphers=ciphers)
+
+    if ca_certs or ca_cert_dir or ca_cert_data:
+        try:
+            context.load_verify_locations(ca_certs, ca_cert_dir, ca_cert_data)
+        except IOError as e:  # Platform-specific: Python 2.7
+            raise SSLError(e)
+        # Py33 raises FileNotFoundError which subclasses OSError
+        # These are not equivalent unless we check the errno attribute
+        except OSError as e:  # Platform-specific: Python 3.3 and beyond
+            if e.errno == errno.ENOENT:
+                raise SSLError(e)
+            raise
+
+    elif ssl_context is None and hasattr(context, "load_default_certs"):
+        # try to load OS default certs; works well on Windows (require Python3.4+)
+        context.load_default_certs()
+
+    # Attempt to detect if we get the goofy behavior of the
+    # keyfile being encrypted and OpenSSL asking for the
+    # passphrase via the terminal and instead error out.
+    if keyfile and key_password is None and _is_key_file_encrypted(keyfile):
+        raise SSLError("Client private key is encrypted, password is required")
+
+    if certfile:
+        if key_password is None:
+            context.load_cert_chain(certfile, keyfile)
+        else:
+            context.load_cert_chain(certfile, keyfile, key_password)
+
+    # If we detect server_hostname is an IP address then the SNI
+    # extension should not be used according to RFC3546 Section 3.1
+    # We shouldn't warn the user if SNI isn't available but we would
+    # not be using SNI anyways due to IP address for server_hostname.
+    if (
+        server_hostname is not None and not is_ipaddress(server_hostname)
+    ) or IS_SECURETRANSPORT:
+        if HAS_SNI and server_hostname is not None:
+            return context.wrap_socket(sock, server_hostname=server_hostname)
+
+        warnings.warn(
+            "An HTTPS request has been made, but the SNI (Server Name "
+            "Indication) extension to TLS is not available on this platform. "
+            "This may cause the server to present an incorrect TLS "
+            "certificate, which can cause validation failures. You can upgrade to "
+            "a newer version of Python to solve this. For more information, see "
+            "https://urllib3.readthedocs.io/en/latest/advanced-usage.html"
+            "#ssl-warnings",
+            SNIMissingWarning,
+        )
+
+    return context.wrap_socket(sock)
+
+
+def is_ipaddress(hostname):
+    """Detects whether the hostname given is an IPv4 or IPv6 address.
+    Also detects IPv6 addresses with Zone IDs.
+
+    :param str hostname: Hostname to examine.
+    :return: True if the hostname is an IP address, False otherwise.
+    """
+    if not six.PY2 and isinstance(hostname, bytes):
+        # IDN A-label bytes are ASCII compatible.
+        hostname = hostname.decode("ascii")
+    return bool(IPV4_RE.match(hostname) or BRACELESS_IPV6_ADDRZ_RE.match(hostname))
+
+
+def _is_key_file_encrypted(key_file):
+    """Detects if a key file is encrypted or not."""
+    with open(key_file, "r") as f:
+        for line in f:
+            # Look for Proc-Type: 4,ENCRYPTED
+            if "ENCRYPTED" in line:
+                return True
+
+    return False
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/timeout.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/timeout.py
new file mode 100644
index 0000000..b61fea7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/timeout.py
@@ -0,0 +1,261 @@
+from __future__ import absolute_import
+
+# The default socket timeout, used by httplib to indicate that no timeout was
+# specified by the user
+from socket import _GLOBAL_DEFAULT_TIMEOUT
+import time
+
+from ..exceptions import TimeoutStateError
+
+# A sentinel value to indicate that no timeout was specified by the user in
+# urllib3
+_Default = object()
+
+
+# Use time.monotonic if available.
+current_time = getattr(time, "monotonic", time.time)
+
+
+class Timeout(object):
+    """ Timeout configuration.
+
+    Timeouts can be defined as a default for a pool::
+
+        timeout = Timeout(connect=2.0, read=7.0)
+        http = PoolManager(timeout=timeout)
+        response = http.request('GET', 'http://example.com/')
+
+    Or per-request (which overrides the default for the pool)::
+
+        response = http.request('GET', 'http://example.com/', timeout=Timeout(10))
+
+    Timeouts can be disabled by setting all the parameters to ``None``::
+
+        no_timeout = Timeout(connect=None, read=None)
+        response = http.request('GET', 'http://example.com/, timeout=no_timeout)
+
+
+    :param total:
+        This combines the connect and read timeouts into one; the read timeout
+        will be set to the time leftover from the connect attempt. In the
+        event that both a connect timeout and a total are specified, or a read
+        timeout and a total are specified, the shorter timeout will be applied.
+
+        Defaults to None.
+
+    :type total: integer, float, or None
+
+    :param connect:
+        The maximum amount of time (in seconds) to wait for a connection
+        attempt to a server to succeed. Omitting the parameter will default the
+        connect timeout to the system default, probably `the global default
+        timeout in socket.py
+        <http://hg.python.org/cpython/file/603b4d593758/Lib/socket.py#l535>`_.
+        None will set an infinite timeout for connection attempts.
+
+    :type connect: integer, float, or None
+
+    :param read:
+        The maximum amount of time (in seconds) to wait between consecutive
+        read operations for a response from the server. Omitting the parameter
+        will default the read timeout to the system default, probably `the
+        global default timeout in socket.py
+        <http://hg.python.org/cpython/file/603b4d593758/Lib/socket.py#l535>`_.
+        None will set an infinite timeout.
+
+    :type read: integer, float, or None
+
+    .. note::
+
+        Many factors can affect the total amount of time for urllib3 to return
+        an HTTP response.
+
+        For example, Python's DNS resolver does not obey the timeout specified
+        on the socket. Other factors that can affect total request time include
+        high CPU load, high swap, the program running at a low priority level,
+        or other behaviors.
+
+        In addition, the read and total timeouts only measure the time between
+        read operations on the socket connecting the client and the server,
+        not the total amount of time for the request to return a complete
+        response. For most requests, the timeout is raised because the server
+        has not sent the first byte in the specified time. This is not always
+        the case; if a server streams one byte every fifteen seconds, a timeout
+        of 20 seconds will not trigger, even though the request will take
+        several minutes to complete.
+
+        If your goal is to cut off any request after a set amount of wall clock
+        time, consider having a second "watcher" thread to cut off a slow
+        request.
+    """
+
+    #: A sentinel object representing the default timeout value
+    DEFAULT_TIMEOUT = _GLOBAL_DEFAULT_TIMEOUT
+
+    def __init__(self, total=None, connect=_Default, read=_Default):
+        self._connect = self._validate_timeout(connect, "connect")
+        self._read = self._validate_timeout(read, "read")
+        self.total = self._validate_timeout(total, "total")
+        self._start_connect = None
+
+    def __repr__(self):
+        return "%s(connect=%r, read=%r, total=%r)" % (
+            type(self).__name__,
+            self._connect,
+            self._read,
+            self.total,
+        )
+
+    # __str__ provided for backwards compatibility
+    __str__ = __repr__
+
+    @classmethod
+    def _validate_timeout(cls, value, name):
+        """ Check that a timeout attribute is valid.
+
+        :param value: The timeout value to validate
+        :param name: The name of the timeout attribute to validate. This is
+            used to specify in error messages.
+        :return: The validated and casted version of the given value.
+        :raises ValueError: If it is a numeric value less than or equal to
+            zero, or the type is not an integer, float, or None.
+        """
+        if value is _Default:
+            return cls.DEFAULT_TIMEOUT
+
+        if value is None or value is cls.DEFAULT_TIMEOUT:
+            return value
+
+        if isinstance(value, bool):
+            raise ValueError(
+                "Timeout cannot be a boolean value. It must "
+                "be an int, float or None."
+            )
+        try:
+            float(value)
+        except (TypeError, ValueError):
+            raise ValueError(
+                "Timeout value %s was %s, but it must be an "
+                "int, float or None." % (name, value)
+            )
+
+        try:
+            if value <= 0:
+                raise ValueError(
+                    "Attempted to set %s timeout to %s, but the "
+                    "timeout cannot be set to a value less "
+                    "than or equal to 0." % (name, value)
+                )
+        except TypeError:
+            # Python 3
+            raise ValueError(
+                "Timeout value %s was %s, but it must be an "
+                "int, float or None." % (name, value)
+            )
+
+        return value
+
+    @classmethod
+    def from_float(cls, timeout):
+        """ Create a new Timeout from a legacy timeout value.
+
+        The timeout value used by httplib.py sets the same timeout on the
+        connect(), and recv() socket requests. This creates a :class:`Timeout`
+        object that sets the individual timeouts to the ``timeout`` value
+        passed to this function.
+
+        :param timeout: The legacy timeout value.
+        :type timeout: integer, float, sentinel default object, or None
+        :return: Timeout object
+        :rtype: :class:`Timeout`
+        """
+        return Timeout(read=timeout, connect=timeout)
+
+    def clone(self):
+        """ Create a copy of the timeout object
+
+        Timeout properties are stored per-pool but each request needs a fresh
+        Timeout object to ensure each one has its own start/stop configured.
+
+        :return: a copy of the timeout object
+        :rtype: :class:`Timeout`
+        """
+        # We can't use copy.deepcopy because that will also create a new object
+        # for _GLOBAL_DEFAULT_TIMEOUT, which socket.py uses as a sentinel to
+        # detect the user default.
+        return Timeout(connect=self._connect, read=self._read, total=self.total)
+
+    def start_connect(self):
+        """ Start the timeout clock, used during a connect() attempt
+
+        :raises urllib3.exceptions.TimeoutStateError: if you attempt
+            to start a timer that has been started already.
+        """
+        if self._start_connect is not None:
+            raise TimeoutStateError("Timeout timer has already been started.")
+        self._start_connect = current_time()
+        return self._start_connect
+
+    def get_connect_duration(self):
+        """ Gets the time elapsed since the call to :meth:`start_connect`.
+
+        :return: Elapsed time in seconds.
+        :rtype: float
+        :raises urllib3.exceptions.TimeoutStateError: if you attempt
+            to get duration for a timer that hasn't been started.
+        """
+        if self._start_connect is None:
+            raise TimeoutStateError(
+                "Can't get connect duration for timer that has not started."
+            )
+        return current_time() - self._start_connect
+
+    @property
+    def connect_timeout(self):
+        """ Get the value to use when setting a connection timeout.
+
+        This will be a positive float or integer, the value None
+        (never timeout), or the default system timeout.
+
+        :return: Connect timeout.
+        :rtype: int, float, :attr:`Timeout.DEFAULT_TIMEOUT` or None
+        """
+        if self.total is None:
+            return self._connect
+
+        if self._connect is None or self._connect is self.DEFAULT_TIMEOUT:
+            return self.total
+
+        return min(self._connect, self.total)
+
+    @property
+    def read_timeout(self):
+        """ Get the value for the read timeout.
+
+        This assumes some time has elapsed in the connection timeout and
+        computes the read timeout appropriately.
+
+        If self.total is set, the read timeout is dependent on the amount of
+        time taken by the connect timeout. If the connection time has not been
+        established, a :exc:`~urllib3.exceptions.TimeoutStateError` will be
+        raised.
+
+        :return: Value to use for the read timeout.
+        :rtype: int, float, :attr:`Timeout.DEFAULT_TIMEOUT` or None
+        :raises urllib3.exceptions.TimeoutStateError: If :meth:`start_connect`
+            has not yet been called on this object.
+        """
+        if (
+            self.total is not None
+            and self.total is not self.DEFAULT_TIMEOUT
+            and self._read is not None
+            and self._read is not self.DEFAULT_TIMEOUT
+        ):
+            # In case the connect timeout has not yet been established.
+            if self._start_connect is None:
+                return self._read
+            return max(0, min(self.total - self.get_connect_duration(), self._read))
+        elif self.total is not None and self.total is not self.DEFAULT_TIMEOUT:
+            return max(0, self.total - self.get_connect_duration())
+        else:
+            return self._read
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/url.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/url.py
new file mode 100644
index 0000000..0eb0b6a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/url.py
@@ -0,0 +1,430 @@
+from __future__ import absolute_import
+import re
+from collections import namedtuple
+
+from ..exceptions import LocationParseError
+from ..packages import six
+
+
+url_attrs = ["scheme", "auth", "host", "port", "path", "query", "fragment"]
+
+# We only want to normalize urls with an HTTP(S) scheme.
+# urllib3 infers URLs without a scheme (None) to be http.
+NORMALIZABLE_SCHEMES = ("http", "https", None)
+
+# Almost all of these patterns were derived from the
+# 'rfc3986' module: https://github.com/python-hyper/rfc3986
+PERCENT_RE = re.compile(r"%[a-fA-F0-9]{2}")
+SCHEME_RE = re.compile(r"^(?:[a-zA-Z][a-zA-Z0-9+-]*:|/)")
+URI_RE = re.compile(
+    r"^(?:([a-zA-Z][a-zA-Z0-9+.-]*):)?"
+    r"(?://([^\\/?#]*))?"
+    r"([^?#]*)"
+    r"(?:\?([^#]*))?"
+    r"(?:#(.*))?$",
+    re.UNICODE | re.DOTALL,
+)
+
+IPV4_PAT = r"(?:[0-9]{1,3}\.){3}[0-9]{1,3}"
+HEX_PAT = "[0-9A-Fa-f]{1,4}"
+LS32_PAT = "(?:{hex}:{hex}|{ipv4})".format(hex=HEX_PAT, ipv4=IPV4_PAT)
+_subs = {"hex": HEX_PAT, "ls32": LS32_PAT}
+_variations = [
+    #                            6( h16 ":" ) ls32
+    "(?:%(hex)s:){6}%(ls32)s",
+    #                       "::" 5( h16 ":" ) ls32
+    "::(?:%(hex)s:){5}%(ls32)s",
+    # [               h16 ] "::" 4( h16 ":" ) ls32
+    "(?:%(hex)s)?::(?:%(hex)s:){4}%(ls32)s",
+    # [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
+    "(?:(?:%(hex)s:)?%(hex)s)?::(?:%(hex)s:){3}%(ls32)s",
+    # [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
+    "(?:(?:%(hex)s:){0,2}%(hex)s)?::(?:%(hex)s:){2}%(ls32)s",
+    # [ *3( h16 ":" ) h16 ] "::"    h16 ":"   ls32
+    "(?:(?:%(hex)s:){0,3}%(hex)s)?::%(hex)s:%(ls32)s",
+    # [ *4( h16 ":" ) h16 ] "::"              ls32
+    "(?:(?:%(hex)s:){0,4}%(hex)s)?::%(ls32)s",
+    # [ *5( h16 ":" ) h16 ] "::"              h16
+    "(?:(?:%(hex)s:){0,5}%(hex)s)?::%(hex)s",
+    # [ *6( h16 ":" ) h16 ] "::"
+    "(?:(?:%(hex)s:){0,6}%(hex)s)?::",
+]
+
+UNRESERVED_PAT = r"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._!\-~"
+IPV6_PAT = "(?:" + "|".join([x % _subs for x in _variations]) + ")"
+ZONE_ID_PAT = "(?:%25|%)(?:[" + UNRESERVED_PAT + "]|%[a-fA-F0-9]{2})+"
+IPV6_ADDRZ_PAT = r"\[" + IPV6_PAT + r"(?:" + ZONE_ID_PAT + r")?\]"
+REG_NAME_PAT = r"(?:[^\[\]%:/?#]|%[a-fA-F0-9]{2})*"
+TARGET_RE = re.compile(r"^(/[^?#]*)(?:\?([^#]*))?(?:#.*)?$")
+
+IPV4_RE = re.compile("^" + IPV4_PAT + "$")
+IPV6_RE = re.compile("^" + IPV6_PAT + "$")
+IPV6_ADDRZ_RE = re.compile("^" + IPV6_ADDRZ_PAT + "$")
+BRACELESS_IPV6_ADDRZ_RE = re.compile("^" + IPV6_ADDRZ_PAT[2:-2] + "$")
+ZONE_ID_RE = re.compile("(" + ZONE_ID_PAT + r")\]$")
+
+SUBAUTHORITY_PAT = (u"^(?:(.*)@)?(%s|%s|%s)(?::([0-9]{0,5}))?$") % (
+    REG_NAME_PAT,
+    IPV4_PAT,
+    IPV6_ADDRZ_PAT,
+)
+SUBAUTHORITY_RE = re.compile(SUBAUTHORITY_PAT, re.UNICODE | re.DOTALL)
+
+UNRESERVED_CHARS = set(
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._-~"
+)
+SUB_DELIM_CHARS = set("!$&'()*+,;=")
+USERINFO_CHARS = UNRESERVED_CHARS | SUB_DELIM_CHARS | {":"}
+PATH_CHARS = USERINFO_CHARS | {"@", "/"}
+QUERY_CHARS = FRAGMENT_CHARS = PATH_CHARS | {"?"}
+
+
+class Url(namedtuple("Url", url_attrs)):
+    """
+    Data structure for representing an HTTP URL. Used as a return value for
+    :func:`parse_url`. Both the scheme and host are normalized as they are
+    both case-insensitive according to RFC 3986.
+    """
+
+    __slots__ = ()
+
+    def __new__(
+        cls,
+        scheme=None,
+        auth=None,
+        host=None,
+        port=None,
+        path=None,
+        query=None,
+        fragment=None,
+    ):
+        if path and not path.startswith("/"):
+            path = "/" + path
+        if scheme is not None:
+            scheme = scheme.lower()
+        return super(Url, cls).__new__(
+            cls, scheme, auth, host, port, path, query, fragment
+        )
+
+    @property
+    def hostname(self):
+        """For backwards-compatibility with urlparse. We're nice like that."""
+        return self.host
+
+    @property
+    def request_uri(self):
+        """Absolute path including the query string."""
+        uri = self.path or "/"
+
+        if self.query is not None:
+            uri += "?" + self.query
+
+        return uri
+
+    @property
+    def netloc(self):
+        """Network location including host and port"""
+        if self.port:
+            return "%s:%d" % (self.host, self.port)
+        return self.host
+
+    @property
+    def url(self):
+        """
+        Convert self into a url
+
+        This function should more or less round-trip with :func:`.parse_url`. The
+        returned url may not be exactly the same as the url inputted to
+        :func:`.parse_url`, but it should be equivalent by the RFC (e.g., urls
+        with a blank port will have : removed).
+
+        Example: ::
+
+            >>> U = parse_url('http://google.com/mail/')
+            >>> U.url
+            'http://google.com/mail/'
+            >>> Url('http', 'username:password', 'host.com', 80,
+            ... '/path', 'query', 'fragment').url
+            'http://username:password@host.com:80/path?query#fragment'
+        """
+        scheme, auth, host, port, path, query, fragment = self
+        url = u""
+
+        # We use "is not None" we want things to happen with empty strings (or 0 port)
+        if scheme is not None:
+            url += scheme + u"://"
+        if auth is not None:
+            url += auth + u"@"
+        if host is not None:
+            url += host
+        if port is not None:
+            url += u":" + str(port)
+        if path is not None:
+            url += path
+        if query is not None:
+            url += u"?" + query
+        if fragment is not None:
+            url += u"#" + fragment
+
+        return url
+
+    def __str__(self):
+        return self.url
+
+
+def split_first(s, delims):
+    """
+    .. deprecated:: 1.25
+
+    Given a string and an iterable of delimiters, split on the first found
+    delimiter. Return two split parts and the matched delimiter.
+
+    If not found, then the first part is the full input string.
+
+    Example::
+
+        >>> split_first('foo/bar?baz', '?/=')
+        ('foo', 'bar?baz', '/')
+        >>> split_first('foo/bar?baz', '123')
+        ('foo/bar?baz', '', None)
+
+    Scales linearly with number of delims. Not ideal for large number of delims.
+    """
+    min_idx = None
+    min_delim = None
+    for d in delims:
+        idx = s.find(d)
+        if idx < 0:
+            continue
+
+        if min_idx is None or idx < min_idx:
+            min_idx = idx
+            min_delim = d
+
+    if min_idx is None or min_idx < 0:
+        return s, "", None
+
+    return s[:min_idx], s[min_idx + 1 :], min_delim
+
+
+def _encode_invalid_chars(component, allowed_chars, encoding="utf-8"):
+    """Percent-encodes a URI component without reapplying
+    onto an already percent-encoded component.
+    """
+    if component is None:
+        return component
+
+    component = six.ensure_text(component)
+
+    # Normalize existing percent-encoded bytes.
+    # Try to see if the component we're encoding is already percent-encoded
+    # so we can skip all '%' characters but still encode all others.
+    component, percent_encodings = PERCENT_RE.subn(
+        lambda match: match.group(0).upper(), component
+    )
+
+    uri_bytes = component.encode("utf-8", "surrogatepass")
+    is_percent_encoded = percent_encodings == uri_bytes.count(b"%")
+    encoded_component = bytearray()
+
+    for i in range(0, len(uri_bytes)):
+        # Will return a single character bytestring on both Python 2 & 3
+        byte = uri_bytes[i : i + 1]
+        byte_ord = ord(byte)
+        if (is_percent_encoded and byte == b"%") or (
+            byte_ord < 128 and byte.decode() in allowed_chars
+        ):
+            encoded_component += byte
+            continue
+        encoded_component.extend(b"%" + (hex(byte_ord)[2:].encode().zfill(2).upper()))
+
+    return encoded_component.decode(encoding)
+
+
+def _remove_path_dot_segments(path):
+    # See http://tools.ietf.org/html/rfc3986#section-5.2.4 for pseudo-code
+    segments = path.split("/")  # Turn the path into a list of segments
+    output = []  # Initialize the variable to use to store output
+
+    for segment in segments:
+        # '.' is the current directory, so ignore it, it is superfluous
+        if segment == ".":
+            continue
+        # Anything other than '..', should be appended to the output
+        elif segment != "..":
+            output.append(segment)
+        # In this case segment == '..', if we can, we should pop the last
+        # element
+        elif output:
+            output.pop()
+
+    # If the path starts with '/' and the output is empty or the first string
+    # is non-empty
+    if path.startswith("/") and (not output or output[0]):
+        output.insert(0, "")
+
+    # If the path starts with '/.' or '/..' ensure we add one more empty
+    # string to add a trailing '/'
+    if path.endswith(("/.", "/..")):
+        output.append("")
+
+    return "/".join(output)
+
+
+def _normalize_host(host, scheme):
+    if host:
+        if isinstance(host, six.binary_type):
+            host = six.ensure_str(host)
+
+        if scheme in NORMALIZABLE_SCHEMES:
+            is_ipv6 = IPV6_ADDRZ_RE.match(host)
+            if is_ipv6:
+                match = ZONE_ID_RE.search(host)
+                if match:
+                    start, end = match.span(1)
+                    zone_id = host[start:end]
+
+                    if zone_id.startswith("%25") and zone_id != "%25":
+                        zone_id = zone_id[3:]
+                    else:
+                        zone_id = zone_id[1:]
+                    zone_id = "%" + _encode_invalid_chars(zone_id, UNRESERVED_CHARS)
+                    return host[:start].lower() + zone_id + host[end:]
+                else:
+                    return host.lower()
+            elif not IPV4_RE.match(host):
+                return six.ensure_str(
+                    b".".join([_idna_encode(label) for label in host.split(".")])
+                )
+    return host
+
+
+def _idna_encode(name):
+    if name and any([ord(x) > 128 for x in name]):
+        try:
+            from pip._vendor import idna
+        except ImportError:
+            six.raise_from(
+                LocationParseError("Unable to parse URL without the 'idna' module"),
+                None,
+            )
+        try:
+            return idna.encode(name.lower(), strict=True, std3_rules=True)
+        except idna.IDNAError:
+            six.raise_from(
+                LocationParseError(u"Name '%s' is not a valid IDNA label" % name), None
+            )
+    return name.lower().encode("ascii")
+
+
+def _encode_target(target):
+    """Percent-encodes a request target so that there are no invalid characters"""
+    path, query = TARGET_RE.match(target).groups()
+    target = _encode_invalid_chars(path, PATH_CHARS)
+    query = _encode_invalid_chars(query, QUERY_CHARS)
+    if query is not None:
+        target += "?" + query
+    return target
+
+
+def parse_url(url):
+    """
+    Given a url, return a parsed :class:`.Url` namedtuple. Best-effort is
+    performed to parse incomplete urls. Fields not provided will be None.
+    This parser is RFC 3986 compliant.
+
+    The parser logic and helper functions are based heavily on
+    work done in the ``rfc3986`` module.
+
+    :param str url: URL to parse into a :class:`.Url` namedtuple.
+
+    Partly backwards-compatible with :mod:`urlparse`.
+
+    Example::
+
+        >>> parse_url('http://google.com/mail/')
+        Url(scheme='http', host='google.com', port=None, path='/mail/', ...)
+        >>> parse_url('google.com:80')
+        Url(scheme=None, host='google.com', port=80, path=None, ...)
+        >>> parse_url('/foo?bar')
+        Url(scheme=None, host=None, port=None, path='/foo', query='bar', ...)
+    """
+    if not url:
+        # Empty
+        return Url()
+
+    source_url = url
+    if not SCHEME_RE.search(url):
+        url = "//" + url
+
+    try:
+        scheme, authority, path, query, fragment = URI_RE.match(url).groups()
+        normalize_uri = scheme is None or scheme.lower() in NORMALIZABLE_SCHEMES
+
+        if scheme:
+            scheme = scheme.lower()
+
+        if authority:
+            auth, host, port = SUBAUTHORITY_RE.match(authority).groups()
+            if auth and normalize_uri:
+                auth = _encode_invalid_chars(auth, USERINFO_CHARS)
+            if port == "":
+                port = None
+        else:
+            auth, host, port = None, None, None
+
+        if port is not None:
+            port = int(port)
+            if not (0 <= port <= 65535):
+                raise LocationParseError(url)
+
+        host = _normalize_host(host, scheme)
+
+        if normalize_uri and path:
+            path = _remove_path_dot_segments(path)
+            path = _encode_invalid_chars(path, PATH_CHARS)
+        if normalize_uri and query:
+            query = _encode_invalid_chars(query, QUERY_CHARS)
+        if normalize_uri and fragment:
+            fragment = _encode_invalid_chars(fragment, FRAGMENT_CHARS)
+
+    except (ValueError, AttributeError):
+        return six.raise_from(LocationParseError(source_url), None)
+
+    # For the sake of backwards compatibility we put empty
+    # string values for path if there are any defined values
+    # beyond the path in the URL.
+    # TODO: Remove this when we break backwards compatibility.
+    if not path:
+        if query is not None or fragment is not None:
+            path = ""
+        else:
+            path = None
+
+    # Ensure that each part of the URL is a `str` for
+    # backwards compatibility.
+    if isinstance(url, six.text_type):
+        ensure_func = six.ensure_text
+    else:
+        ensure_func = six.ensure_str
+
+    def ensure_type(x):
+        return x if x is None else ensure_func(x)
+
+    return Url(
+        scheme=ensure_type(scheme),
+        auth=ensure_type(auth),
+        host=ensure_type(host),
+        port=port,
+        path=ensure_type(path),
+        query=ensure_type(query),
+        fragment=ensure_type(fragment),
+    )
+
+
+def get_host(url):
+    """
+    Deprecated. Use :func:`parse_url` instead.
+    """
+    p = parse_url(url)
+    return p.scheme or "http", p.hostname, p.port
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/wait.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/wait.py
new file mode 100644
index 0000000..d71d2fd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/urllib3/util/wait.py
@@ -0,0 +1,153 @@
+import errno
+from functools import partial
+import select
+import sys
+
+try:
+    from time import monotonic
+except ImportError:
+    from time import time as monotonic
+
+__all__ = ["NoWayToWaitForSocketError", "wait_for_read", "wait_for_write"]
+
+
+class NoWayToWaitForSocketError(Exception):
+    pass
+
+
+# How should we wait on sockets?
+#
+# There are two types of APIs you can use for waiting on sockets: the fancy
+# modern stateful APIs like epoll/kqueue, and the older stateless APIs like
+# select/poll. The stateful APIs are more efficient when you have a lots of
+# sockets to keep track of, because you can set them up once and then use them
+# lots of times. But we only ever want to wait on a single socket at a time
+# and don't want to keep track of state, so the stateless APIs are actually
+# more efficient. So we want to use select() or poll().
+#
+# Now, how do we choose between select() and poll()? On traditional Unixes,
+# select() has a strange calling convention that makes it slow, or fail
+# altogether, for high-numbered file descriptors. The point of poll() is to fix
+# that, so on Unixes, we prefer poll().
+#
+# On Windows, there is no poll() (or at least Python doesn't provide a wrapper
+# for it), but that's OK, because on Windows, select() doesn't have this
+# strange calling convention; plain select() works fine.
+#
+# So: on Windows we use select(), and everywhere else we use poll(). We also
+# fall back to select() in case poll() is somehow broken or missing.
+
+if sys.version_info >= (3, 5):
+    # Modern Python, that retries syscalls by default
+    def _retry_on_intr(fn, timeout):
+        return fn(timeout)
+
+
+else:
+    # Old and broken Pythons.
+    def _retry_on_intr(fn, timeout):
+        if timeout is None:
+            deadline = float("inf")
+        else:
+            deadline = monotonic() + timeout
+
+        while True:
+            try:
+                return fn(timeout)
+            # OSError for 3 <= pyver < 3.5, select.error for pyver <= 2.7
+            except (OSError, select.error) as e:
+                # 'e.args[0]' incantation works for both OSError and select.error
+                if e.args[0] != errno.EINTR:
+                    raise
+                else:
+                    timeout = deadline - monotonic()
+                    if timeout < 0:
+                        timeout = 0
+                    if timeout == float("inf"):
+                        timeout = None
+                    continue
+
+
+def select_wait_for_socket(sock, read=False, write=False, timeout=None):
+    if not read and not write:
+        raise RuntimeError("must specify at least one of read=True, write=True")
+    rcheck = []
+    wcheck = []
+    if read:
+        rcheck.append(sock)
+    if write:
+        wcheck.append(sock)
+    # When doing a non-blocking connect, most systems signal success by
+    # marking the socket writable. Windows, though, signals success by marked
+    # it as "exceptional". We paper over the difference by checking the write
+    # sockets for both conditions. (The stdlib selectors module does the same
+    # thing.)
+    fn = partial(select.select, rcheck, wcheck, wcheck)
+    rready, wready, xready = _retry_on_intr(fn, timeout)
+    return bool(rready or wready or xready)
+
+
+def poll_wait_for_socket(sock, read=False, write=False, timeout=None):
+    if not read and not write:
+        raise RuntimeError("must specify at least one of read=True, write=True")
+    mask = 0
+    if read:
+        mask |= select.POLLIN
+    if write:
+        mask |= select.POLLOUT
+    poll_obj = select.poll()
+    poll_obj.register(sock, mask)
+
+    # For some reason, poll() takes timeout in milliseconds
+    def do_poll(t):
+        if t is not None:
+            t *= 1000
+        return poll_obj.poll(t)
+
+    return bool(_retry_on_intr(do_poll, timeout))
+
+
+def null_wait_for_socket(*args, **kwargs):
+    raise NoWayToWaitForSocketError("no select-equivalent available")
+
+
+def _have_working_poll():
+    # Apparently some systems have a select.poll that fails as soon as you try
+    # to use it, either due to strange configuration or broken monkeypatching
+    # from libraries like eventlet/greenlet.
+    try:
+        poll_obj = select.poll()
+        _retry_on_intr(poll_obj.poll, 0)
+    except (AttributeError, OSError):
+        return False
+    else:
+        return True
+
+
+def wait_for_socket(*args, **kwargs):
+    # We delay choosing which implementation to use until the first time we're
+    # called. We could do it at import time, but then we might make the wrong
+    # decision if someone goes wild with monkeypatching select.poll after
+    # we're imported.
+    global wait_for_socket
+    if _have_working_poll():
+        wait_for_socket = poll_wait_for_socket
+    elif hasattr(select, "select"):
+        wait_for_socket = select_wait_for_socket
+    else:  # Platform-specific: Appengine.
+        wait_for_socket = null_wait_for_socket
+    return wait_for_socket(*args, **kwargs)
+
+
+def wait_for_read(sock, timeout=None):
+    """ Waits for reading to be available on a given socket.
+    Returns True if the socket is readable, or False if the timeout expired.
+    """
+    return wait_for_socket(sock, read=True, timeout=timeout)
+
+
+def wait_for_write(sock, timeout=None):
+    """ Waits for writing to be available on a given socket.
+    Returns True if the socket is readable, or False if the timeout expired.
+    """
+    return wait_for_socket(sock, write=True, timeout=timeout)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/vendor.txt b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/vendor.txt
new file mode 100644
index 0000000..06fa135
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/vendor.txt
@@ -0,0 +1,24 @@
+appdirs==1.4.4
+CacheControl==0.12.6
+colorama==0.4.3
+contextlib2==0.6.0.post1
+distlib==0.3.1
+distro==1.5.0
+html5lib==1.1
+ipaddress==1.0.23  # Only needed on 2.6 and 2.7
+msgpack==1.0.0
+packaging==20.4
+pep517==0.8.2
+progress==1.5
+pyparsing==2.4.7
+requests==2.24.0
+    certifi==2020.06.20
+    chardet==3.0.4
+    idna==2.10
+    urllib3==1.25.9
+resolvelib==0.4.0
+retrying==1.3.3
+setuptools==44.0.0
+six==1.15.0
+toml==0.10.1
+webencodings==0.5.1
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/__init__.py
new file mode 100644
index 0000000..d21d697
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/__init__.py
@@ -0,0 +1,342 @@
+# coding: utf-8
+"""
+
+    webencodings
+    ~~~~~~~~~~~~
+
+    This is a Python implementation of the `WHATWG Encoding standard
+    <http://encoding.spec.whatwg.org/>`. See README for details.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+from __future__ import unicode_literals
+
+import codecs
+
+from .labels import LABELS
+
+
+VERSION = '0.5.1'
+
+
+# Some names in Encoding are not valid Python aliases. Remap these.
+PYTHON_NAMES = {
+    'iso-8859-8-i': 'iso-8859-8',
+    'x-mac-cyrillic': 'mac-cyrillic',
+    'macintosh': 'mac-roman',
+    'windows-874': 'cp874'}
+
+CACHE = {}
+
+
+def ascii_lower(string):
+    r"""Transform (only) ASCII letters to lower case: A-Z is mapped to a-z.
+
+    :param string: An Unicode string.
+    :returns: A new Unicode string.
+
+    This is used for `ASCII case-insensitive
+    <http://encoding.spec.whatwg.org/#ascii-case-insensitive>`_
+    matching of encoding labels.
+    The same matching is also used, among other things,
+    for `CSS keywords <http://dev.w3.org/csswg/css-values/#keywords>`_.
+
+    This is different from the :meth:`~py:str.lower` method of Unicode strings
+    which also affect non-ASCII characters,
+    sometimes mapping them into the ASCII range:
+
+        >>> keyword = u'Bac\N{KELVIN SIGN}ground'
+        >>> assert keyword.lower() == u'background'
+        >>> assert ascii_lower(keyword) != keyword.lower()
+        >>> assert ascii_lower(keyword) == u'bac\N{KELVIN SIGN}ground'
+
+    """
+    # This turns out to be faster than unicode.translate()
+    return string.encode('utf8').lower().decode('utf8')
+
+
+def lookup(label):
+    """
+    Look for an encoding by its label.
+    This is the spec’s `get an encoding
+    <http://encoding.spec.whatwg.org/#concept-encoding-get>`_ algorithm.
+    Supported labels are listed there.
+
+    :param label: A string.
+    :returns:
+        An :class:`Encoding` object, or :obj:`None` for an unknown label.
+
+    """
+    # Only strip ASCII whitespace: U+0009, U+000A, U+000C, U+000D, and U+0020.
+    label = ascii_lower(label.strip('\t\n\f\r '))
+    name = LABELS.get(label)
+    if name is None:
+        return None
+    encoding = CACHE.get(name)
+    if encoding is None:
+        if name == 'x-user-defined':
+            from .x_user_defined import codec_info
+        else:
+            python_name = PYTHON_NAMES.get(name, name)
+            # Any python_name value that gets to here should be valid.
+            codec_info = codecs.lookup(python_name)
+        encoding = Encoding(name, codec_info)
+        CACHE[name] = encoding
+    return encoding
+
+
+def _get_encoding(encoding_or_label):
+    """
+    Accept either an encoding object or label.
+
+    :param encoding: An :class:`Encoding` object or a label string.
+    :returns: An :class:`Encoding` object.
+    :raises: :exc:`~exceptions.LookupError` for an unknown label.
+
+    """
+    if hasattr(encoding_or_label, 'codec_info'):
+        return encoding_or_label
+
+    encoding = lookup(encoding_or_label)
+    if encoding is None:
+        raise LookupError('Unknown encoding label: %r' % encoding_or_label)
+    return encoding
+
+
+class Encoding(object):
+    """Reresents a character encoding such as UTF-8,
+    that can be used for decoding or encoding.
+
+    .. attribute:: name
+
+        Canonical name of the encoding
+
+    .. attribute:: codec_info
+
+        The actual implementation of the encoding,
+        a stdlib :class:`~codecs.CodecInfo` object.
+        See :func:`codecs.register`.
+
+    """
+    def __init__(self, name, codec_info):
+        self.name = name
+        self.codec_info = codec_info
+
+    def __repr__(self):
+        return '<Encoding %s>' % self.name
+
+
+#: The UTF-8 encoding. Should be used for new content and formats.
+UTF8 = lookup('utf-8')
+
+_UTF16LE = lookup('utf-16le')
+_UTF16BE = lookup('utf-16be')
+
+
+def decode(input, fallback_encoding, errors='replace'):
+    """
+    Decode a single string.
+
+    :param input: A byte string
+    :param fallback_encoding:
+        An :class:`Encoding` object or a label string.
+        The encoding to use if :obj:`input` does note have a BOM.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :return:
+        A ``(output, encoding)`` tuple of an Unicode string
+        and an :obj:`Encoding`.
+
+    """
+    # Fail early if `encoding` is an invalid label.
+    fallback_encoding = _get_encoding(fallback_encoding)
+    bom_encoding, input = _detect_bom(input)
+    encoding = bom_encoding or fallback_encoding
+    return encoding.codec_info.decode(input, errors)[0], encoding
+
+
+def _detect_bom(input):
+    """Return (bom_encoding, input), with any BOM removed from the input."""
+    if input.startswith(b'\xFF\xFE'):
+        return _UTF16LE, input[2:]
+    if input.startswith(b'\xFE\xFF'):
+        return _UTF16BE, input[2:]
+    if input.startswith(b'\xEF\xBB\xBF'):
+        return UTF8, input[3:]
+    return None, input
+
+
+def encode(input, encoding=UTF8, errors='strict'):
+    """
+    Encode a single string.
+
+    :param input: An Unicode string.
+    :param encoding: An :class:`Encoding` object or a label string.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :return: A byte string.
+
+    """
+    return _get_encoding(encoding).codec_info.encode(input, errors)[0]
+
+
+def iter_decode(input, fallback_encoding, errors='replace'):
+    """
+    "Pull"-based decoder.
+
+    :param input:
+        An iterable of byte strings.
+
+        The input is first consumed just enough to determine the encoding
+        based on the precense of a BOM,
+        then consumed on demand when the return value is.
+    :param fallback_encoding:
+        An :class:`Encoding` object or a label string.
+        The encoding to use if :obj:`input` does note have a BOM.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :returns:
+        An ``(output, encoding)`` tuple.
+        :obj:`output` is an iterable of Unicode strings,
+        :obj:`encoding` is the :obj:`Encoding` that is being used.
+
+    """
+
+    decoder = IncrementalDecoder(fallback_encoding, errors)
+    generator = _iter_decode_generator(input, decoder)
+    encoding = next(generator)
+    return generator, encoding
+
+
+def _iter_decode_generator(input, decoder):
+    """Return a generator that first yields the :obj:`Encoding`,
+    then yields output chukns as Unicode strings.
+
+    """
+    decode = decoder.decode
+    input = iter(input)
+    for chunck in input:
+        output = decode(chunck)
+        if output:
+            assert decoder.encoding is not None
+            yield decoder.encoding
+            yield output
+            break
+    else:
+        # Input exhausted without determining the encoding
+        output = decode(b'', final=True)
+        assert decoder.encoding is not None
+        yield decoder.encoding
+        if output:
+            yield output
+        return
+
+    for chunck in input:
+        output = decode(chunck)
+        if output:
+            yield output
+    output = decode(b'', final=True)
+    if output:
+        yield output
+
+
+def iter_encode(input, encoding=UTF8, errors='strict'):
+    """
+    “Pull”-based encoder.
+
+    :param input: An iterable of Unicode strings.
+    :param encoding: An :class:`Encoding` object or a label string.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :returns: An iterable of byte strings.
+
+    """
+    # Fail early if `encoding` is an invalid label.
+    encode = IncrementalEncoder(encoding, errors).encode
+    return _iter_encode_generator(input, encode)
+
+
+def _iter_encode_generator(input, encode):
+    for chunck in input:
+        output = encode(chunck)
+        if output:
+            yield output
+    output = encode('', final=True)
+    if output:
+        yield output
+
+
+class IncrementalDecoder(object):
+    """
+    “Push”-based decoder.
+
+    :param fallback_encoding:
+        An :class:`Encoding` object or a label string.
+        The encoding to use if :obj:`input` does note have a BOM.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+
+    """
+    def __init__(self, fallback_encoding, errors='replace'):
+        # Fail early if `encoding` is an invalid label.
+        self._fallback_encoding = _get_encoding(fallback_encoding)
+        self._errors = errors
+        self._buffer = b''
+        self._decoder = None
+        #: The actual :class:`Encoding` that is being used,
+        #: or :obj:`None` if that is not determined yet.
+        #: (Ie. if there is not enough input yet to determine
+        #: if there is a BOM.)
+        self.encoding = None  # Not known yet.
+
+    def decode(self, input, final=False):
+        """Decode one chunk of the input.
+
+        :param input: A byte string.
+        :param final:
+            Indicate that no more input is available.
+            Must be :obj:`True` if this is the last call.
+        :returns: An Unicode string.
+
+        """
+        decoder = self._decoder
+        if decoder is not None:
+            return decoder(input, final)
+
+        input = self._buffer + input
+        encoding, input = _detect_bom(input)
+        if encoding is None:
+            if len(input) < 3 and not final:  # Not enough data yet.
+                self._buffer = input
+                return ''
+            else:  # No BOM
+                encoding = self._fallback_encoding
+        decoder = encoding.codec_info.incrementaldecoder(self._errors).decode
+        self._decoder = decoder
+        self.encoding = encoding
+        return decoder(input, final)
+
+
+class IncrementalEncoder(object):
+    """
+    “Push”-based encoder.
+
+    :param encoding: An :class:`Encoding` object or a label string.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+
+    .. method:: encode(input, final=False)
+
+        :param input: An Unicode string.
+        :param final:
+            Indicate that no more input is available.
+            Must be :obj:`True` if this is the last call.
+        :returns: A byte string.
+
+    """
+    def __init__(self, encoding=UTF8, errors='strict'):
+        encoding = _get_encoding(encoding)
+        self.encode = encoding.codec_info.incrementalencoder(errors).encode
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/labels.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/labels.py
new file mode 100644
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--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/labels.py
@@ -0,0 +1,231 @@
+"""
+
+    webencodings.labels
+    ~~~~~~~~~~~~~~~~~~~
+
+    Map encoding labels to their name.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+# XXX Do not edit!
+# This file is automatically generated by mklabels.py
+
+LABELS = {
+    'unicode-1-1-utf-8':   'utf-8',
+    'utf-8':               'utf-8',
+    'utf8':                'utf-8',
+    '866':                 'ibm866',
+    'cp866':               'ibm866',
+    'csibm866':            'ibm866',
+    'ibm866':              'ibm866',
+    'csisolatin2':         'iso-8859-2',
+    'iso-8859-2':          'iso-8859-2',
+    'iso-ir-101':          'iso-8859-2',
+    'iso8859-2':           'iso-8859-2',
+    'iso88592':            'iso-8859-2',
+    'iso_8859-2':          'iso-8859-2',
+    'iso_8859-2:1987':     'iso-8859-2',
+    'l2':                  'iso-8859-2',
+    'latin2':              'iso-8859-2',
+    'csisolatin3':         'iso-8859-3',
+    'iso-8859-3':          'iso-8859-3',
+    'iso-ir-109':          'iso-8859-3',
+    'iso8859-3':           'iso-8859-3',
+    'iso88593':            'iso-8859-3',
+    'iso_8859-3':          'iso-8859-3',
+    'iso_8859-3:1988':     'iso-8859-3',
+    'l3':                  'iso-8859-3',
+    'latin3':              'iso-8859-3',
+    'csisolatin4':         'iso-8859-4',
+    'iso-8859-4':          'iso-8859-4',
+    'iso-ir-110':          'iso-8859-4',
+    'iso8859-4':           'iso-8859-4',
+    'iso88594':            'iso-8859-4',
+    'iso_8859-4':          'iso-8859-4',
+    'iso_8859-4:1988':     'iso-8859-4',
+    'l4':                  'iso-8859-4',
+    'latin4':              'iso-8859-4',
+    'csisolatincyrillic':  'iso-8859-5',
+    'cyrillic':            'iso-8859-5',
+    'iso-8859-5':          'iso-8859-5',
+    'iso-ir-144':          'iso-8859-5',
+    'iso8859-5':           'iso-8859-5',
+    'iso88595':            'iso-8859-5',
+    'iso_8859-5':          'iso-8859-5',
+    'iso_8859-5:1988':     'iso-8859-5',
+    'arabic':              'iso-8859-6',
+    'asmo-708':            'iso-8859-6',
+    'csiso88596e':         'iso-8859-6',
+    'csiso88596i':         'iso-8859-6',
+    'csisolatinarabic':    'iso-8859-6',
+    'ecma-114':            'iso-8859-6',
+    'iso-8859-6':          'iso-8859-6',
+    'iso-8859-6-e':        'iso-8859-6',
+    'iso-8859-6-i':        'iso-8859-6',
+    'iso-ir-127':          'iso-8859-6',
+    'iso8859-6':           'iso-8859-6',
+    'iso88596':            'iso-8859-6',
+    'iso_8859-6':          'iso-8859-6',
+    'iso_8859-6:1987':     'iso-8859-6',
+    'csisolatingreek':     'iso-8859-7',
+    'ecma-118':            'iso-8859-7',
+    'elot_928':            'iso-8859-7',
+    'greek':               'iso-8859-7',
+    'greek8':              'iso-8859-7',
+    'iso-8859-7':          'iso-8859-7',
+    'iso-ir-126':          'iso-8859-7',
+    'iso8859-7':           'iso-8859-7',
+    'iso88597':            'iso-8859-7',
+    'iso_8859-7':          'iso-8859-7',
+    'iso_8859-7:1987':     'iso-8859-7',
+    'sun_eu_greek':        'iso-8859-7',
+    'csiso88598e':         'iso-8859-8',
+    'csisolatinhebrew':    'iso-8859-8',
+    'hebrew':              'iso-8859-8',
+    'iso-8859-8':          'iso-8859-8',
+    'iso-8859-8-e':        'iso-8859-8',
+    'iso-ir-138':          'iso-8859-8',
+    'iso8859-8':           'iso-8859-8',
+    'iso88598':            'iso-8859-8',
+    'iso_8859-8':          'iso-8859-8',
+    'iso_8859-8:1988':     'iso-8859-8',
+    'visual':              'iso-8859-8',
+    'csiso88598i':         'iso-8859-8-i',
+    'iso-8859-8-i':        'iso-8859-8-i',
+    'logical':             'iso-8859-8-i',
+    'csisolatin6':         'iso-8859-10',
+    'iso-8859-10':         'iso-8859-10',
+    'iso-ir-157':          'iso-8859-10',
+    'iso8859-10':          'iso-8859-10',
+    'iso885910':           'iso-8859-10',
+    'l6':                  'iso-8859-10',
+    'latin6':              'iso-8859-10',
+    'iso-8859-13':         'iso-8859-13',
+    'iso8859-13':          'iso-8859-13',
+    'iso885913':           'iso-8859-13',
+    'iso-8859-14':         'iso-8859-14',
+    'iso8859-14':          'iso-8859-14',
+    'iso885914':           'iso-8859-14',
+    'csisolatin9':         'iso-8859-15',
+    'iso-8859-15':         'iso-8859-15',
+    'iso8859-15':          'iso-8859-15',
+    'iso885915':           'iso-8859-15',
+    'iso_8859-15':         'iso-8859-15',
+    'l9':                  'iso-8859-15',
+    'iso-8859-16':         'iso-8859-16',
+    'cskoi8r':             'koi8-r',
+    'koi':                 'koi8-r',
+    'koi8':                'koi8-r',
+    'koi8-r':              'koi8-r',
+    'koi8_r':              'koi8-r',
+    'koi8-u':              'koi8-u',
+    'csmacintosh':         'macintosh',
+    'mac':                 'macintosh',
+    'macintosh':           'macintosh',
+    'x-mac-roman':         'macintosh',
+    'dos-874':             'windows-874',
+    'iso-8859-11':         'windows-874',
+    'iso8859-11':          'windows-874',
+    'iso885911':           'windows-874',
+    'tis-620':             'windows-874',
+    'windows-874':         'windows-874',
+    'cp1250':              'windows-1250',
+    'windows-1250':        'windows-1250',
+    'x-cp1250':            'windows-1250',
+    'cp1251':              'windows-1251',
+    'windows-1251':        'windows-1251',
+    'x-cp1251':            'windows-1251',
+    'ansi_x3.4-1968':      'windows-1252',
+    'ascii':               'windows-1252',
+    'cp1252':              'windows-1252',
+    'cp819':               'windows-1252',
+    'csisolatin1':         'windows-1252',
+    'ibm819':              'windows-1252',
+    'iso-8859-1':          'windows-1252',
+    'iso-ir-100':          'windows-1252',
+    'iso8859-1':           'windows-1252',
+    'iso88591':            'windows-1252',
+    'iso_8859-1':          'windows-1252',
+    'iso_8859-1:1987':     'windows-1252',
+    'l1':                  'windows-1252',
+    'latin1':              'windows-1252',
+    'us-ascii':            'windows-1252',
+    'windows-1252':        'windows-1252',
+    'x-cp1252':            'windows-1252',
+    'cp1253':              'windows-1253',
+    'windows-1253':        'windows-1253',
+    'x-cp1253':            'windows-1253',
+    'cp1254':              'windows-1254',
+    'csisolatin5':         'windows-1254',
+    'iso-8859-9':          'windows-1254',
+    'iso-ir-148':          'windows-1254',
+    'iso8859-9':           'windows-1254',
+    'iso88599':            'windows-1254',
+    'iso_8859-9':          'windows-1254',
+    'iso_8859-9:1989':     'windows-1254',
+    'l5':                  'windows-1254',
+    'latin5':              'windows-1254',
+    'windows-1254':        'windows-1254',
+    'x-cp1254':            'windows-1254',
+    'cp1255':              'windows-1255',
+    'windows-1255':        'windows-1255',
+    'x-cp1255':            'windows-1255',
+    'cp1256':              'windows-1256',
+    'windows-1256':        'windows-1256',
+    'x-cp1256':            'windows-1256',
+    'cp1257':              'windows-1257',
+    'windows-1257':        'windows-1257',
+    'x-cp1257':            'windows-1257',
+    'cp1258':              'windows-1258',
+    'windows-1258':        'windows-1258',
+    'x-cp1258':            'windows-1258',
+    'x-mac-cyrillic':      'x-mac-cyrillic',
+    'x-mac-ukrainian':     'x-mac-cyrillic',
+    'chinese':             'gbk',
+    'csgb2312':            'gbk',
+    'csiso58gb231280':     'gbk',
+    'gb2312':              'gbk',
+    'gb_2312':             'gbk',
+    'gb_2312-80':          'gbk',
+    'gbk':                 'gbk',
+    'iso-ir-58':           'gbk',
+    'x-gbk':               'gbk',
+    'gb18030':             'gb18030',
+    'hz-gb-2312':          'hz-gb-2312',
+    'big5':                'big5',
+    'big5-hkscs':          'big5',
+    'cn-big5':             'big5',
+    'csbig5':              'big5',
+    'x-x-big5':            'big5',
+    'cseucpkdfmtjapanese': 'euc-jp',
+    'euc-jp':              'euc-jp',
+    'x-euc-jp':            'euc-jp',
+    'csiso2022jp':         'iso-2022-jp',
+    'iso-2022-jp':         'iso-2022-jp',
+    'csshiftjis':          'shift_jis',
+    'ms_kanji':            'shift_jis',
+    'shift-jis':           'shift_jis',
+    'shift_jis':           'shift_jis',
+    'sjis':                'shift_jis',
+    'windows-31j':         'shift_jis',
+    'x-sjis':              'shift_jis',
+    'cseuckr':             'euc-kr',
+    'csksc56011987':       'euc-kr',
+    'euc-kr':              'euc-kr',
+    'iso-ir-149':          'euc-kr',
+    'korean':              'euc-kr',
+    'ks_c_5601-1987':      'euc-kr',
+    'ks_c_5601-1989':      'euc-kr',
+    'ksc5601':             'euc-kr',
+    'ksc_5601':            'euc-kr',
+    'windows-949':         'euc-kr',
+    'csiso2022kr':         'iso-2022-kr',
+    'iso-2022-kr':         'iso-2022-kr',
+    'utf-16be':            'utf-16be',
+    'utf-16':              'utf-16le',
+    'utf-16le':            'utf-16le',
+    'x-user-defined':      'x-user-defined',
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/mklabels.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/mklabels.py
new file mode 100644
index 0000000..295dc92
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/mklabels.py
@@ -0,0 +1,59 @@
+"""
+
+    webencodings.mklabels
+    ~~~~~~~~~~~~~~~~~~~~~
+
+    Regenarate the webencodings.labels module.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+import json
+try:
+    from urllib import urlopen
+except ImportError:
+    from urllib.request import urlopen
+
+
+def assert_lower(string):
+    assert string == string.lower()
+    return string
+
+
+def generate(url):
+    parts = ['''\
+"""
+
+    webencodings.labels
+    ~~~~~~~~~~~~~~~~~~~
+
+    Map encoding labels to their name.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+# XXX Do not edit!
+# This file is automatically generated by mklabels.py
+
+LABELS = {
+''']
+    labels = [
+        (repr(assert_lower(label)).lstrip('u'),
+         repr(encoding['name']).lstrip('u'))
+        for category in json.loads(urlopen(url).read().decode('ascii'))
+        for encoding in category['encodings']
+        for label in encoding['labels']]
+    max_len = max(len(label) for label, name in labels)
+    parts.extend(
+        '    %s:%s %s,\n' % (label, ' ' * (max_len - len(label)), name)
+        for label, name in labels)
+    parts.append('}')
+    return ''.join(parts)
+
+
+if __name__ == '__main__':
+    print(generate('http://encoding.spec.whatwg.org/encodings.json'))
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/tests.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/tests.py
new file mode 100644
index 0000000..e12c10d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/tests.py
@@ -0,0 +1,153 @@
+# coding: utf-8
+"""
+
+    webencodings.tests
+    ~~~~~~~~~~~~~~~~~~
+
+    A basic test suite for Encoding.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+from __future__ import unicode_literals
+
+from . import (lookup, LABELS, decode, encode, iter_decode, iter_encode,
+               IncrementalDecoder, IncrementalEncoder, UTF8)
+
+
+def assert_raises(exception, function, *args, **kwargs):
+    try:
+        function(*args, **kwargs)
+    except exception:
+        return
+    else:  # pragma: no cover
+        raise AssertionError('Did not raise %s.' % exception)
+
+
+def test_labels():
+    assert lookup('utf-8').name == 'utf-8'
+    assert lookup('Utf-8').name == 'utf-8'
+    assert lookup('UTF-8').name == 'utf-8'
+    assert lookup('utf8').name == 'utf-8'
+    assert lookup('utf8').name == 'utf-8'
+    assert lookup('utf8 ').name == 'utf-8'
+    assert lookup(' \r\nutf8\t').name == 'utf-8'
+    assert lookup('u8') is None  # Python label.
+    assert lookup('utf-8 ') is None  # Non-ASCII white space.
+
+    assert lookup('US-ASCII').name == 'windows-1252'
+    assert lookup('iso-8859-1').name == 'windows-1252'
+    assert lookup('latin1').name == 'windows-1252'
+    assert lookup('LATIN1').name == 'windows-1252'
+    assert lookup('latin-1') is None
+    assert lookup('LATİN1') is None  # ASCII-only case insensitivity.
+
+
+def test_all_labels():
+    for label in LABELS:
+        assert decode(b'', label) == ('', lookup(label))
+        assert encode('', label) == b''
+        for repeat in [0, 1, 12]:
+            output, _ = iter_decode([b''] * repeat, label)
+            assert list(output) == []
+            assert list(iter_encode([''] * repeat, label)) == []
+        decoder = IncrementalDecoder(label)
+        assert decoder.decode(b'') == ''
+        assert decoder.decode(b'', final=True) == ''
+        encoder = IncrementalEncoder(label)
+        assert encoder.encode('') == b''
+        assert encoder.encode('', final=True) == b''
+    # All encoding names are valid labels too:
+    for name in set(LABELS.values()):
+        assert lookup(name).name == name
+
+
+def test_invalid_label():
+    assert_raises(LookupError, decode, b'\xEF\xBB\xBF\xc3\xa9', 'invalid')
+    assert_raises(LookupError, encode, 'é', 'invalid')
+    assert_raises(LookupError, iter_decode, [], 'invalid')
+    assert_raises(LookupError, iter_encode, [], 'invalid')
+    assert_raises(LookupError, IncrementalDecoder, 'invalid')
+    assert_raises(LookupError, IncrementalEncoder, 'invalid')
+
+
+def test_decode():
+    assert decode(b'\x80', 'latin1') == ('€', lookup('latin1'))
+    assert decode(b'\x80', lookup('latin1')) == ('€', lookup('latin1'))
+    assert decode(b'\xc3\xa9', 'utf8') == ('é', lookup('utf8'))
+    assert decode(b'\xc3\xa9', UTF8) == ('é', lookup('utf8'))
+    assert decode(b'\xc3\xa9', 'ascii') == ('é', lookup('ascii'))
+    assert decode(b'\xEF\xBB\xBF\xc3\xa9', 'ascii') == ('é', lookup('utf8'))  # UTF-8 with BOM
+
+    assert decode(b'\xFE\xFF\x00\xe9', 'ascii') == ('é', lookup('utf-16be'))  # UTF-16-BE with BOM
+    assert decode(b'\xFF\xFE\xe9\x00', 'ascii') == ('é', lookup('utf-16le'))  # UTF-16-LE with BOM
+    assert decode(b'\xFE\xFF\xe9\x00', 'ascii') == ('\ue900', lookup('utf-16be'))
+    assert decode(b'\xFF\xFE\x00\xe9', 'ascii') == ('\ue900', lookup('utf-16le'))
+
+    assert decode(b'\x00\xe9', 'UTF-16BE') == ('é', lookup('utf-16be'))
+    assert decode(b'\xe9\x00', 'UTF-16LE') == ('é', lookup('utf-16le'))
+    assert decode(b'\xe9\x00', 'UTF-16') == ('é', lookup('utf-16le'))
+
+    assert decode(b'\xe9\x00', 'UTF-16BE') == ('\ue900', lookup('utf-16be'))
+    assert decode(b'\x00\xe9', 'UTF-16LE') == ('\ue900', lookup('utf-16le'))
+    assert decode(b'\x00\xe9', 'UTF-16') == ('\ue900', lookup('utf-16le'))
+
+
+def test_encode():
+    assert encode('é', 'latin1') == b'\xe9'
+    assert encode('é', 'utf8') == b'\xc3\xa9'
+    assert encode('é', 'utf8') == b'\xc3\xa9'
+    assert encode('é', 'utf-16') == b'\xe9\x00'
+    assert encode('é', 'utf-16le') == b'\xe9\x00'
+    assert encode('é', 'utf-16be') == b'\x00\xe9'
+
+
+def test_iter_decode():
+    def iter_decode_to_string(input, fallback_encoding):
+        output, _encoding = iter_decode(input, fallback_encoding)
+        return ''.join(output)
+    assert iter_decode_to_string([], 'latin1') == ''
+    assert iter_decode_to_string([b''], 'latin1') == ''
+    assert iter_decode_to_string([b'\xe9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'hello'], 'latin1') == 'hello'
+    assert iter_decode_to_string([b'he', b'llo'], 'latin1') == 'hello'
+    assert iter_decode_to_string([b'hell', b'o'], 'latin1') == 'hello'
+    assert iter_decode_to_string([b'\xc3\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'\xEF\xBB\xBF\xc3\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'\xEF\xBB\xBF', b'\xc3', b'\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'\xEF\xBB\xBF', b'a', b'\xc3'], 'latin1') == 'a\uFFFD'
+    assert iter_decode_to_string([
+        b'', b'\xEF', b'', b'', b'\xBB\xBF\xc3', b'\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'\xEF\xBB\xBF'], 'latin1') == ''
+    assert iter_decode_to_string([b'\xEF\xBB'], 'latin1') == 'ï»'
+    assert iter_decode_to_string([b'\xFE\xFF\x00\xe9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'\xFF\xFE\xe9\x00'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'', b'\xFF', b'', b'', b'\xFE\xe9', b'\x00'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'', b'h\xe9', b'llo'], 'x-user-defined') == 'h\uF7E9llo'
+
+
+def test_iter_encode():
+    assert b''.join(iter_encode([], 'latin1')) == b''
+    assert b''.join(iter_encode([''], 'latin1')) == b''
+    assert b''.join(iter_encode(['é'], 'latin1')) == b'\xe9'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'latin1')) == b'\xe9'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16')) == b'\xe9\x00'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16le')) == b'\xe9\x00'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16be')) == b'\x00\xe9'
+    assert b''.join(iter_encode([
+        '', 'h\uF7E9', '', 'llo'], 'x-user-defined')) == b'h\xe9llo'
+
+
+def test_x_user_defined():
+    encoded = b'2,\x0c\x0b\x1aO\xd9#\xcb\x0f\xc9\xbbt\xcf\xa8\xca'
+    decoded = '2,\x0c\x0b\x1aO\uf7d9#\uf7cb\x0f\uf7c9\uf7bbt\uf7cf\uf7a8\uf7ca'
+    encoded = b'aa'
+    decoded = 'aa'
+    assert decode(encoded, 'x-user-defined') == (decoded, lookup('x-user-defined'))
+    assert encode(decoded, 'x-user-defined') == encoded
diff --git a/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/x_user_defined.py b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/x_user_defined.py
new file mode 100644
index 0000000..d16e326
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pip/_vendor/webencodings/x_user_defined.py
@@ -0,0 +1,325 @@
+# coding: utf-8
+"""
+
+    webencodings.x_user_defined
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    An implementation of the x-user-defined encoding.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+from __future__ import unicode_literals
+
+import codecs
+
+
+### Codec APIs
+
+class Codec(codecs.Codec):
+
+    def encode(self, input, errors='strict'):
+        return codecs.charmap_encode(input, errors, encoding_table)
+
+    def decode(self, input, errors='strict'):
+        return codecs.charmap_decode(input, errors, decoding_table)
+
+
+class IncrementalEncoder(codecs.IncrementalEncoder):
+    def encode(self, input, final=False):
+        return codecs.charmap_encode(input, self.errors, encoding_table)[0]
+
+
+class IncrementalDecoder(codecs.IncrementalDecoder):
+    def decode(self, input, final=False):
+        return codecs.charmap_decode(input, self.errors, decoding_table)[0]
+
+
+class StreamWriter(Codec, codecs.StreamWriter):
+    pass
+
+
+class StreamReader(Codec, codecs.StreamReader):
+    pass
+
+
+### encodings module API
+
+codec_info = codecs.CodecInfo(
+    name='x-user-defined',
+    encode=Codec().encode,
+    decode=Codec().decode,
+    incrementalencoder=IncrementalEncoder,
+    incrementaldecoder=IncrementalDecoder,
+    streamreader=StreamReader,
+    streamwriter=StreamWriter,
+)
+
+
+### Decoding Table
+
+# Python 3:
+# for c in range(256): print('    %r' % chr(c if c < 128 else c + 0xF700))
+decoding_table = (
+    '\x00'
+    '\x01'
+    '\x02'
+    '\x03'
+    '\x04'
+    '\x05'
+    '\x06'
+    '\x07'
+    '\x08'
+    '\t'
+    '\n'
+    '\x0b'
+    '\x0c'
+    '\r'
+    '\x0e'
+    '\x0f'
+    '\x10'
+    '\x11'
+    '\x12'
+    '\x13'
+    '\x14'
+    '\x15'
+    '\x16'
+    '\x17'
+    '\x18'
+    '\x19'
+    '\x1a'
+    '\x1b'
+    '\x1c'
+    '\x1d'
+    '\x1e'
+    '\x1f'
+    ' '
+    '!'
+    '"'
+    '#'
+    '$'
+    '%'
+    '&'
+    "'"
+    '('
+    ')'
+    '*'
+    '+'
+    ','
+    '-'
+    '.'
+    '/'
+    '0'
+    '1'
+    '2'
+    '3'
+    '4'
+    '5'
+    '6'
+    '7'
+    '8'
+    '9'
+    ':'
+    ';'
+    '<'
+    '='
+    '>'
+    '?'
+    '@'
+    'A'
+    'B'
+    'C'
+    'D'
+    'E'
+    'F'
+    'G'
+    'H'
+    'I'
+    'J'
+    'K'
+    'L'
+    'M'
+    'N'
+    'O'
+    'P'
+    'Q'
+    'R'
+    'S'
+    'T'
+    'U'
+    'V'
+    'W'
+    'X'
+    'Y'
+    'Z'
+    '['
+    '\\'
+    ']'
+    '^'
+    '_'
+    '`'
+    'a'
+    'b'
+    'c'
+    'd'
+    'e'
+    'f'
+    'g'
+    'h'
+    'i'
+    'j'
+    'k'
+    'l'
+    'm'
+    'n'
+    'o'
+    'p'
+    'q'
+    'r'
+    's'
+    't'
+    'u'
+    'v'
+    'w'
+    'x'
+    'y'
+    'z'
+    '{'
+    '|'
+    '}'
+    '~'
+    '\x7f'
+    '\uf780'
+    '\uf781'
+    '\uf782'
+    '\uf783'
+    '\uf784'
+    '\uf785'
+    '\uf786'
+    '\uf787'
+    '\uf788'
+    '\uf789'
+    '\uf78a'
+    '\uf78b'
+    '\uf78c'
+    '\uf78d'
+    '\uf78e'
+    '\uf78f'
+    '\uf790'
+    '\uf791'
+    '\uf792'
+    '\uf793'
+    '\uf794'
+    '\uf795'
+    '\uf796'
+    '\uf797'
+    '\uf798'
+    '\uf799'
+    '\uf79a'
+    '\uf79b'
+    '\uf79c'
+    '\uf79d'
+    '\uf79e'
+    '\uf79f'
+    '\uf7a0'
+    '\uf7a1'
+    '\uf7a2'
+    '\uf7a3'
+    '\uf7a4'
+    '\uf7a5'
+    '\uf7a6'
+    '\uf7a7'
+    '\uf7a8'
+    '\uf7a9'
+    '\uf7aa'
+    '\uf7ab'
+    '\uf7ac'
+    '\uf7ad'
+    '\uf7ae'
+    '\uf7af'
+    '\uf7b0'
+    '\uf7b1'
+    '\uf7b2'
+    '\uf7b3'
+    '\uf7b4'
+    '\uf7b5'
+    '\uf7b6'
+    '\uf7b7'
+    '\uf7b8'
+    '\uf7b9'
+    '\uf7ba'
+    '\uf7bb'
+    '\uf7bc'
+    '\uf7bd'
+    '\uf7be'
+    '\uf7bf'
+    '\uf7c0'
+    '\uf7c1'
+    '\uf7c2'
+    '\uf7c3'
+    '\uf7c4'
+    '\uf7c5'
+    '\uf7c6'
+    '\uf7c7'
+    '\uf7c8'
+    '\uf7c9'
+    '\uf7ca'
+    '\uf7cb'
+    '\uf7cc'
+    '\uf7cd'
+    '\uf7ce'
+    '\uf7cf'
+    '\uf7d0'
+    '\uf7d1'
+    '\uf7d2'
+    '\uf7d3'
+    '\uf7d4'
+    '\uf7d5'
+    '\uf7d6'
+    '\uf7d7'
+    '\uf7d8'
+    '\uf7d9'
+    '\uf7da'
+    '\uf7db'
+    '\uf7dc'
+    '\uf7dd'
+    '\uf7de'
+    '\uf7df'
+    '\uf7e0'
+    '\uf7e1'
+    '\uf7e2'
+    '\uf7e3'
+    '\uf7e4'
+    '\uf7e5'
+    '\uf7e6'
+    '\uf7e7'
+    '\uf7e8'
+    '\uf7e9'
+    '\uf7ea'
+    '\uf7eb'
+    '\uf7ec'
+    '\uf7ed'
+    '\uf7ee'
+    '\uf7ef'
+    '\uf7f0'
+    '\uf7f1'
+    '\uf7f2'
+    '\uf7f3'
+    '\uf7f4'
+    '\uf7f5'
+    '\uf7f6'
+    '\uf7f7'
+    '\uf7f8'
+    '\uf7f9'
+    '\uf7fa'
+    '\uf7fb'
+    '\uf7fc'
+    '\uf7fd'
+    '\uf7fe'
+    '\uf7ff'
+)
+
+### Encoding table
+encoding_table = codecs.charmap_build(decoding_table)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/__init__.py
new file mode 100644
index 0000000..51fb119
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/__init__.py
@@ -0,0 +1,3296 @@
+# coding: utf-8
+"""
+Package resource API
+--------------------
+
+A resource is a logical file contained within a package, or a logical
+subdirectory thereof.  The package resource API expects resource names
+to have their path parts separated with ``/``, *not* whatever the local
+path separator is.  Do not use os.path operations to manipulate resource
+names being passed into the API.
+
+The package resource API is designed to work with normal filesystem packages,
+.egg files, and unpacked .egg files.  It can also work in a limited way with
+.zip files and with custom PEP 302 loaders that support the ``get_data()``
+method.
+"""
+
+from __future__ import absolute_import
+
+import sys
+import os
+import io
+import time
+import re
+import types
+import zipfile
+import zipimport
+import warnings
+import stat
+import functools
+import pkgutil
+import operator
+import platform
+import collections
+import plistlib
+import email.parser
+import errno
+import tempfile
+import textwrap
+import itertools
+import inspect
+import ntpath
+import posixpath
+from pkgutil import get_importer
+
+try:
+    import _imp
+except ImportError:
+    # Python 3.2 compatibility
+    import imp as _imp
+
+try:
+    FileExistsError
+except NameError:
+    FileExistsError = OSError
+
+from pkg_resources.extern import six
+from pkg_resources.extern.six.moves import urllib, map, filter
+
+# capture these to bypass sandboxing
+from os import utime
+try:
+    from os import mkdir, rename, unlink
+    WRITE_SUPPORT = True
+except ImportError:
+    # no write support, probably under GAE
+    WRITE_SUPPORT = False
+
+from os import open as os_open
+from os.path import isdir, split
+
+try:
+    import importlib.machinery as importlib_machinery
+    # access attribute to force import under delayed import mechanisms.
+    importlib_machinery.__name__
+except ImportError:
+    importlib_machinery = None
+
+from . import py31compat
+from pkg_resources.extern import appdirs
+from pkg_resources.extern import packaging
+__import__('pkg_resources.extern.packaging.version')
+__import__('pkg_resources.extern.packaging.specifiers')
+__import__('pkg_resources.extern.packaging.requirements')
+__import__('pkg_resources.extern.packaging.markers')
+
+
+__metaclass__ = type
+
+
+if (3, 0) < sys.version_info < (3, 4):
+    raise RuntimeError("Python 3.4 or later is required")
+
+if six.PY2:
+    # Those builtin exceptions are only defined in Python 3
+    PermissionError = None
+    NotADirectoryError = None
+
+# declare some globals that will be defined later to
+# satisfy the linters.
+require = None
+working_set = None
+add_activation_listener = None
+resources_stream = None
+cleanup_resources = None
+resource_dir = None
+resource_stream = None
+set_extraction_path = None
+resource_isdir = None
+resource_string = None
+iter_entry_points = None
+resource_listdir = None
+resource_filename = None
+resource_exists = None
+_distribution_finders = None
+_namespace_handlers = None
+_namespace_packages = None
+
+
+class PEP440Warning(RuntimeWarning):
+    """
+    Used when there is an issue with a version or specifier not complying with
+    PEP 440.
+    """
+
+
+def parse_version(v):
+    try:
+        return packaging.version.Version(v)
+    except packaging.version.InvalidVersion:
+        return packaging.version.LegacyVersion(v)
+
+
+_state_vars = {}
+
+
+def _declare_state(vartype, **kw):
+    globals().update(kw)
+    _state_vars.update(dict.fromkeys(kw, vartype))
+
+
+def __getstate__():
+    state = {}
+    g = globals()
+    for k, v in _state_vars.items():
+        state[k] = g['_sget_' + v](g[k])
+    return state
+
+
+def __setstate__(state):
+    g = globals()
+    for k, v in state.items():
+        g['_sset_' + _state_vars[k]](k, g[k], v)
+    return state
+
+
+def _sget_dict(val):
+    return val.copy()
+
+
+def _sset_dict(key, ob, state):
+    ob.clear()
+    ob.update(state)
+
+
+def _sget_object(val):
+    return val.__getstate__()
+
+
+def _sset_object(key, ob, state):
+    ob.__setstate__(state)
+
+
+_sget_none = _sset_none = lambda *args: None
+
+
+def get_supported_platform():
+    """Return this platform's maximum compatible version.
+
+    distutils.util.get_platform() normally reports the minimum version
+    of Mac OS X that would be required to *use* extensions produced by
+    distutils.  But what we want when checking compatibility is to know the
+    version of Mac OS X that we are *running*.  To allow usage of packages that
+    explicitly require a newer version of Mac OS X, we must also know the
+    current version of the OS.
+
+    If this condition occurs for any other platform with a version in its
+    platform strings, this function should be extended accordingly.
+    """
+    plat = get_build_platform()
+    m = macosVersionString.match(plat)
+    if m is not None and sys.platform == "darwin":
+        try:
+            plat = 'macosx-%s-%s' % ('.'.join(_macosx_vers()[:2]), m.group(3))
+        except ValueError:
+            # not Mac OS X
+            pass
+    return plat
+
+
+__all__ = [
+    # Basic resource access and distribution/entry point discovery
+    'require', 'run_script', 'get_provider', 'get_distribution',
+    'load_entry_point', 'get_entry_map', 'get_entry_info',
+    'iter_entry_points',
+    'resource_string', 'resource_stream', 'resource_filename',
+    'resource_listdir', 'resource_exists', 'resource_isdir',
+
+    # Environmental control
+    'declare_namespace', 'working_set', 'add_activation_listener',
+    'find_distributions', 'set_extraction_path', 'cleanup_resources',
+    'get_default_cache',
+
+    # Primary implementation classes
+    'Environment', 'WorkingSet', 'ResourceManager',
+    'Distribution', 'Requirement', 'EntryPoint',
+
+    # Exceptions
+    'ResolutionError', 'VersionConflict', 'DistributionNotFound',
+    'UnknownExtra', 'ExtractionError',
+
+    # Warnings
+    'PEP440Warning',
+
+    # Parsing functions and string utilities
+    'parse_requirements', 'parse_version', 'safe_name', 'safe_version',
+    'get_platform', 'compatible_platforms', 'yield_lines', 'split_sections',
+    'safe_extra', 'to_filename', 'invalid_marker', 'evaluate_marker',
+
+    # filesystem utilities
+    'ensure_directory', 'normalize_path',
+
+    # Distribution "precedence" constants
+    'EGG_DIST', 'BINARY_DIST', 'SOURCE_DIST', 'CHECKOUT_DIST', 'DEVELOP_DIST',
+
+    # "Provider" interfaces, implementations, and registration/lookup APIs
+    'IMetadataProvider', 'IResourceProvider', 'FileMetadata',
+    'PathMetadata', 'EggMetadata', 'EmptyProvider', 'empty_provider',
+    'NullProvider', 'EggProvider', 'DefaultProvider', 'ZipProvider',
+    'register_finder', 'register_namespace_handler', 'register_loader_type',
+    'fixup_namespace_packages', 'get_importer',
+
+    # Warnings
+    'PkgResourcesDeprecationWarning',
+
+    # Deprecated/backward compatibility only
+    'run_main', 'AvailableDistributions',
+]
+
+
+class ResolutionError(Exception):
+    """Abstract base for dependency resolution errors"""
+
+    def __repr__(self):
+        return self.__class__.__name__ + repr(self.args)
+
+
+class VersionConflict(ResolutionError):
+    """
+    An already-installed version conflicts with the requested version.
+
+    Should be initialized with the installed Distribution and the requested
+    Requirement.
+    """
+
+    _template = "{self.dist} is installed but {self.req} is required"
+
+    @property
+    def dist(self):
+        return self.args[0]
+
+    @property
+    def req(self):
+        return self.args[1]
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def with_context(self, required_by):
+        """
+        If required_by is non-empty, return a version of self that is a
+        ContextualVersionConflict.
+        """
+        if not required_by:
+            return self
+        args = self.args + (required_by,)
+        return ContextualVersionConflict(*args)
+
+
+class ContextualVersionConflict(VersionConflict):
+    """
+    A VersionConflict that accepts a third parameter, the set of the
+    requirements that required the installed Distribution.
+    """
+
+    _template = VersionConflict._template + ' by {self.required_by}'
+
+    @property
+    def required_by(self):
+        return self.args[2]
+
+
+class DistributionNotFound(ResolutionError):
+    """A requested distribution was not found"""
+
+    _template = ("The '{self.req}' distribution was not found "
+                 "and is required by {self.requirers_str}")
+
+    @property
+    def req(self):
+        return self.args[0]
+
+    @property
+    def requirers(self):
+        return self.args[1]
+
+    @property
+    def requirers_str(self):
+        if not self.requirers:
+            return 'the application'
+        return ', '.join(self.requirers)
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def __str__(self):
+        return self.report()
+
+
+class UnknownExtra(ResolutionError):
+    """Distribution doesn't have an "extra feature" of the given name"""
+
+
+_provider_factories = {}
+
+PY_MAJOR = '{}.{}'.format(*sys.version_info)
+EGG_DIST = 3
+BINARY_DIST = 2
+SOURCE_DIST = 1
+CHECKOUT_DIST = 0
+DEVELOP_DIST = -1
+
+
+def register_loader_type(loader_type, provider_factory):
+    """Register `provider_factory` to make providers for `loader_type`
+
+    `loader_type` is the type or class of a PEP 302 ``module.__loader__``,
+    and `provider_factory` is a function that, passed a *module* object,
+    returns an ``IResourceProvider`` for that module.
+    """
+    _provider_factories[loader_type] = provider_factory
+
+
+def get_provider(moduleOrReq):
+    """Return an IResourceProvider for the named module or requirement"""
+    if isinstance(moduleOrReq, Requirement):
+        return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
+    try:
+        module = sys.modules[moduleOrReq]
+    except KeyError:
+        __import__(moduleOrReq)
+        module = sys.modules[moduleOrReq]
+    loader = getattr(module, '__loader__', None)
+    return _find_adapter(_provider_factories, loader)(module)
+
+
+def _macosx_vers(_cache=[]):
+    if not _cache:
+        version = platform.mac_ver()[0]
+        # fallback for MacPorts
+        if version == '':
+            plist = '/System/Library/CoreServices/SystemVersion.plist'
+            if os.path.exists(plist):
+                if hasattr(plistlib, 'readPlist'):
+                    plist_content = plistlib.readPlist(plist)
+                    if 'ProductVersion' in plist_content:
+                        version = plist_content['ProductVersion']
+
+        _cache.append(version.split('.'))
+    return _cache[0]
+
+
+def _macosx_arch(machine):
+    return {'PowerPC': 'ppc', 'Power_Macintosh': 'ppc'}.get(machine, machine)
+
+
+def get_build_platform():
+    """Return this platform's string for platform-specific distributions
+
+    XXX Currently this is the same as ``distutils.util.get_platform()``, but it
+    needs some hacks for Linux and Mac OS X.
+    """
+    from sysconfig import get_platform
+
+    plat = get_platform()
+    if sys.platform == "darwin" and not plat.startswith('macosx-'):
+        try:
+            version = _macosx_vers()
+            machine = os.uname()[4].replace(" ", "_")
+            return "macosx-%d.%d-%s" % (
+                int(version[0]), int(version[1]),
+                _macosx_arch(machine),
+            )
+        except ValueError:
+            # if someone is running a non-Mac darwin system, this will fall
+            # through to the default implementation
+            pass
+    return plat
+
+
+macosVersionString = re.compile(r"macosx-(\d+)\.(\d+)-(.*)")
+darwinVersionString = re.compile(r"darwin-(\d+)\.(\d+)\.(\d+)-(.*)")
+# XXX backward compat
+get_platform = get_build_platform
+
+
+def compatible_platforms(provided, required):
+    """Can code for the `provided` platform run on the `required` platform?
+
+    Returns true if either platform is ``None``, or the platforms are equal.
+
+    XXX Needs compatibility checks for Linux and other unixy OSes.
+    """
+    if provided is None or required is None or provided == required:
+        # easy case
+        return True
+
+    # Mac OS X special cases
+    reqMac = macosVersionString.match(required)
+    if reqMac:
+        provMac = macosVersionString.match(provided)
+
+        # is this a Mac package?
+        if not provMac:
+            # this is backwards compatibility for packages built before
+            # setuptools 0.6. All packages built after this point will
+            # use the new macosx designation.
+            provDarwin = darwinVersionString.match(provided)
+            if provDarwin:
+                dversion = int(provDarwin.group(1))
+                macosversion = "%s.%s" % (reqMac.group(1), reqMac.group(2))
+                if dversion == 7 and macosversion >= "10.3" or \
+                        dversion == 8 and macosversion >= "10.4":
+                    return True
+            # egg isn't macosx or legacy darwin
+            return False
+
+        # are they the same major version and machine type?
+        if provMac.group(1) != reqMac.group(1) or \
+                provMac.group(3) != reqMac.group(3):
+            return False
+
+        # is the required OS major update >= the provided one?
+        if int(provMac.group(2)) > int(reqMac.group(2)):
+            return False
+
+        return True
+
+    # XXX Linux and other platforms' special cases should go here
+    return False
+
+
+def run_script(dist_spec, script_name):
+    """Locate distribution `dist_spec` and run its `script_name` script"""
+    ns = sys._getframe(1).f_globals
+    name = ns['__name__']
+    ns.clear()
+    ns['__name__'] = name
+    require(dist_spec)[0].run_script(script_name, ns)
+
+
+# backward compatibility
+run_main = run_script
+
+
+def get_distribution(dist):
+    """Return a current distribution object for a Requirement or string"""
+    if isinstance(dist, six.string_types):
+        dist = Requirement.parse(dist)
+    if isinstance(dist, Requirement):
+        dist = get_provider(dist)
+    if not isinstance(dist, Distribution):
+        raise TypeError("Expected string, Requirement, or Distribution", dist)
+    return dist
+
+
+def load_entry_point(dist, group, name):
+    """Return `name` entry point of `group` for `dist` or raise ImportError"""
+    return get_distribution(dist).load_entry_point(group, name)
+
+
+def get_entry_map(dist, group=None):
+    """Return the entry point map for `group`, or the full entry map"""
+    return get_distribution(dist).get_entry_map(group)
+
+
+def get_entry_info(dist, group, name):
+    """Return the EntryPoint object for `group`+`name`, or ``None``"""
+    return get_distribution(dist).get_entry_info(group, name)
+
+
+class IMetadataProvider:
+    def has_metadata(name):
+        """Does the package's distribution contain the named metadata?"""
+
+    def get_metadata(name):
+        """The named metadata resource as a string"""
+
+    def get_metadata_lines(name):
+        """Yield named metadata resource as list of non-blank non-comment lines
+
+       Leading and trailing whitespace is stripped from each line, and lines
+       with ``#`` as the first non-blank character are omitted."""
+
+    def metadata_isdir(name):
+        """Is the named metadata a directory?  (like ``os.path.isdir()``)"""
+
+    def metadata_listdir(name):
+        """List of metadata names in the directory (like ``os.listdir()``)"""
+
+    def run_script(script_name, namespace):
+        """Execute the named script in the supplied namespace dictionary"""
+
+
+class IResourceProvider(IMetadataProvider):
+    """An object that provides access to package resources"""
+
+    def get_resource_filename(manager, resource_name):
+        """Return a true filesystem path for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_stream(manager, resource_name):
+        """Return a readable file-like object for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_string(manager, resource_name):
+        """Return a string containing the contents of `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def has_resource(resource_name):
+        """Does the package contain the named resource?"""
+
+    def resource_isdir(resource_name):
+        """Is the named resource a directory?  (like ``os.path.isdir()``)"""
+
+    def resource_listdir(resource_name):
+        """List of resource names in the directory (like ``os.listdir()``)"""
+
+
+class WorkingSet:
+    """A collection of active distributions on sys.path (or a similar list)"""
+
+    def __init__(self, entries=None):
+        """Create working set from list of path entries (default=sys.path)"""
+        self.entries = []
+        self.entry_keys = {}
+        self.by_key = {}
+        self.callbacks = []
+
+        if entries is None:
+            entries = sys.path
+
+        for entry in entries:
+            self.add_entry(entry)
+
+    @classmethod
+    def _build_master(cls):
+        """
+        Prepare the master working set.
+        """
+        ws = cls()
+        try:
+            from __main__ import __requires__
+        except ImportError:
+            # The main program does not list any requirements
+            return ws
+
+        # ensure the requirements are met
+        try:
+            ws.require(__requires__)
+        except VersionConflict:
+            return cls._build_from_requirements(__requires__)
+
+        return ws
+
+    @classmethod
+    def _build_from_requirements(cls, req_spec):
+        """
+        Build a working set from a requirement spec. Rewrites sys.path.
+        """
+        # try it without defaults already on sys.path
+        # by starting with an empty path
+        ws = cls([])
+        reqs = parse_requirements(req_spec)
+        dists = ws.resolve(reqs, Environment())
+        for dist in dists:
+            ws.add(dist)
+
+        # add any missing entries from sys.path
+        for entry in sys.path:
+            if entry not in ws.entries:
+                ws.add_entry(entry)
+
+        # then copy back to sys.path
+        sys.path[:] = ws.entries
+        return ws
+
+    def add_entry(self, entry):
+        """Add a path item to ``.entries``, finding any distributions on it
+
+        ``find_distributions(entry, True)`` is used to find distributions
+        corresponding to the path entry, and they are added.  `entry` is
+        always appended to ``.entries``, even if it is already present.
+        (This is because ``sys.path`` can contain the same value more than
+        once, and the ``.entries`` of the ``sys.path`` WorkingSet should always
+        equal ``sys.path``.)
+        """
+        self.entry_keys.setdefault(entry, [])
+        self.entries.append(entry)
+        for dist in find_distributions(entry, True):
+            self.add(dist, entry, False)
+
+    def __contains__(self, dist):
+        """True if `dist` is the active distribution for its project"""
+        return self.by_key.get(dist.key) == dist
+
+    def find(self, req):
+        """Find a distribution matching requirement `req`
+
+        If there is an active distribution for the requested project, this
+        returns it as long as it meets the version requirement specified by
+        `req`.  But, if there is an active distribution for the project and it
+        does *not* meet the `req` requirement, ``VersionConflict`` is raised.
+        If there is no active distribution for the requested project, ``None``
+        is returned.
+        """
+        dist = self.by_key.get(req.key)
+        if dist is not None and dist not in req:
+            # XXX add more info
+            raise VersionConflict(dist, req)
+        return dist
+
+    def iter_entry_points(self, group, name=None):
+        """Yield entry point objects from `group` matching `name`
+
+        If `name` is None, yields all entry points in `group` from all
+        distributions in the working set, otherwise only ones matching
+        both `group` and `name` are yielded (in distribution order).
+        """
+        return (
+            entry
+            for dist in self
+            for entry in dist.get_entry_map(group).values()
+            if name is None or name == entry.name
+        )
+
+    def run_script(self, requires, script_name):
+        """Locate distribution for `requires` and run `script_name` script"""
+        ns = sys._getframe(1).f_globals
+        name = ns['__name__']
+        ns.clear()
+        ns['__name__'] = name
+        self.require(requires)[0].run_script(script_name, ns)
+
+    def __iter__(self):
+        """Yield distributions for non-duplicate projects in the working set
+
+        The yield order is the order in which the items' path entries were
+        added to the working set.
+        """
+        seen = {}
+        for item in self.entries:
+            if item not in self.entry_keys:
+                # workaround a cache issue
+                continue
+
+            for key in self.entry_keys[item]:
+                if key not in seen:
+                    seen[key] = 1
+                    yield self.by_key[key]
+
+    def add(self, dist, entry=None, insert=True, replace=False):
+        """Add `dist` to working set, associated with `entry`
+
+        If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
+        On exit from this routine, `entry` is added to the end of the working
+        set's ``.entries`` (if it wasn't already present).
+
+        `dist` is only added to the working set if it's for a project that
+        doesn't already have a distribution in the set, unless `replace=True`.
+        If it's added, any callbacks registered with the ``subscribe()`` method
+        will be called.
+        """
+        if insert:
+            dist.insert_on(self.entries, entry, replace=replace)
+
+        if entry is None:
+            entry = dist.location
+        keys = self.entry_keys.setdefault(entry, [])
+        keys2 = self.entry_keys.setdefault(dist.location, [])
+        if not replace and dist.key in self.by_key:
+            # ignore hidden distros
+            return
+
+        self.by_key[dist.key] = dist
+        if dist.key not in keys:
+            keys.append(dist.key)
+        if dist.key not in keys2:
+            keys2.append(dist.key)
+        self._added_new(dist)
+
+    def resolve(self, requirements, env=None, installer=None,
+                replace_conflicting=False, extras=None):
+        """List all distributions needed to (recursively) meet `requirements`
+
+        `requirements` must be a sequence of ``Requirement`` objects.  `env`,
+        if supplied, should be an ``Environment`` instance.  If
+        not supplied, it defaults to all distributions available within any
+        entry or distribution in the working set.  `installer`, if supplied,
+        will be invoked with each requirement that cannot be met by an
+        already-installed distribution; it should return a ``Distribution`` or
+        ``None``.
+
+        Unless `replace_conflicting=True`, raises a VersionConflict exception
+        if
+        any requirements are found on the path that have the correct name but
+        the wrong version.  Otherwise, if an `installer` is supplied it will be
+        invoked to obtain the correct version of the requirement and activate
+        it.
+
+        `extras` is a list of the extras to be used with these requirements.
+        This is important because extra requirements may look like `my_req;
+        extra = "my_extra"`, which would otherwise be interpreted as a purely
+        optional requirement.  Instead, we want to be able to assert that these
+        requirements are truly required.
+        """
+
+        # set up the stack
+        requirements = list(requirements)[::-1]
+        # set of processed requirements
+        processed = {}
+        # key -> dist
+        best = {}
+        to_activate = []
+
+        req_extras = _ReqExtras()
+
+        # Mapping of requirement to set of distributions that required it;
+        # useful for reporting info about conflicts.
+        required_by = collections.defaultdict(set)
+
+        while requirements:
+            # process dependencies breadth-first
+            req = requirements.pop(0)
+            if req in processed:
+                # Ignore cyclic or redundant dependencies
+                continue
+
+            if not req_extras.markers_pass(req, extras):
+                continue
+
+            dist = best.get(req.key)
+            if dist is None:
+                # Find the best distribution and add it to the map
+                dist = self.by_key.get(req.key)
+                if dist is None or (dist not in req and replace_conflicting):
+                    ws = self
+                    if env is None:
+                        if dist is None:
+                            env = Environment(self.entries)
+                        else:
+                            # Use an empty environment and workingset to avoid
+                            # any further conflicts with the conflicting
+                            # distribution
+                            env = Environment([])
+                            ws = WorkingSet([])
+                    dist = best[req.key] = env.best_match(
+                        req, ws, installer,
+                        replace_conflicting=replace_conflicting
+                    )
+                    if dist is None:
+                        requirers = required_by.get(req, None)
+                        raise DistributionNotFound(req, requirers)
+                to_activate.append(dist)
+            if dist not in req:
+                # Oops, the "best" so far conflicts with a dependency
+                dependent_req = required_by[req]
+                raise VersionConflict(dist, req).with_context(dependent_req)
+
+            # push the new requirements onto the stack
+            new_requirements = dist.requires(req.extras)[::-1]
+            requirements.extend(new_requirements)
+
+            # Register the new requirements needed by req
+            for new_requirement in new_requirements:
+                required_by[new_requirement].add(req.project_name)
+                req_extras[new_requirement] = req.extras
+
+            processed[req] = True
+
+        # return list of distros to activate
+        return to_activate
+
+    def find_plugins(
+            self, plugin_env, full_env=None, installer=None, fallback=True):
+        """Find all activatable distributions in `plugin_env`
+
+        Example usage::
+
+            distributions, errors = working_set.find_plugins(
+                Environment(plugin_dirlist)
+            )
+            # add plugins+libs to sys.path
+            map(working_set.add, distributions)
+            # display errors
+            print('Could not load', errors)
+
+        The `plugin_env` should be an ``Environment`` instance that contains
+        only distributions that are in the project's "plugin directory" or
+        directories. The `full_env`, if supplied, should be an ``Environment``
+        contains all currently-available distributions.  If `full_env` is not
+        supplied, one is created automatically from the ``WorkingSet`` this
+        method is called on, which will typically mean that every directory on
+        ``sys.path`` will be scanned for distributions.
+
+        `installer` is a standard installer callback as used by the
+        ``resolve()`` method. The `fallback` flag indicates whether we should
+        attempt to resolve older versions of a plugin if the newest version
+        cannot be resolved.
+
+        This method returns a 2-tuple: (`distributions`, `error_info`), where
+        `distributions` is a list of the distributions found in `plugin_env`
+        that were loadable, along with any other distributions that are needed
+        to resolve their dependencies.  `error_info` is a dictionary mapping
+        unloadable plugin distributions to an exception instance describing the
+        error that occurred. Usually this will be a ``DistributionNotFound`` or
+        ``VersionConflict`` instance.
+        """
+
+        plugin_projects = list(plugin_env)
+        # scan project names in alphabetic order
+        plugin_projects.sort()
+
+        error_info = {}
+        distributions = {}
+
+        if full_env is None:
+            env = Environment(self.entries)
+            env += plugin_env
+        else:
+            env = full_env + plugin_env
+
+        shadow_set = self.__class__([])
+        # put all our entries in shadow_set
+        list(map(shadow_set.add, self))
+
+        for project_name in plugin_projects:
+
+            for dist in plugin_env[project_name]:
+
+                req = [dist.as_requirement()]
+
+                try:
+                    resolvees = shadow_set.resolve(req, env, installer)
+
+                except ResolutionError as v:
+                    # save error info
+                    error_info[dist] = v
+                    if fallback:
+                        # try the next older version of project
+                        continue
+                    else:
+                        # give up on this project, keep going
+                        break
+
+                else:
+                    list(map(shadow_set.add, resolvees))
+                    distributions.update(dict.fromkeys(resolvees))
+
+                    # success, no need to try any more versions of this project
+                    break
+
+        distributions = list(distributions)
+        distributions.sort()
+
+        return distributions, error_info
+
+    def require(self, *requirements):
+        """Ensure that distributions matching `requirements` are activated
+
+        `requirements` must be a string or a (possibly-nested) sequence
+        thereof, specifying the distributions and versions required.  The
+        return value is a sequence of the distributions that needed to be
+        activated to fulfill the requirements; all relevant distributions are
+        included, even if they were already activated in this working set.
+        """
+        needed = self.resolve(parse_requirements(requirements))
+
+        for dist in needed:
+            self.add(dist)
+
+        return needed
+
+    def subscribe(self, callback, existing=True):
+        """Invoke `callback` for all distributions
+
+        If `existing=True` (default),
+        call on all existing ones, as well.
+        """
+        if callback in self.callbacks:
+            return
+        self.callbacks.append(callback)
+        if not existing:
+            return
+        for dist in self:
+            callback(dist)
+
+    def _added_new(self, dist):
+        for callback in self.callbacks:
+            callback(dist)
+
+    def __getstate__(self):
+        return (
+            self.entries[:], self.entry_keys.copy(), self.by_key.copy(),
+            self.callbacks[:]
+        )
+
+    def __setstate__(self, e_k_b_c):
+        entries, keys, by_key, callbacks = e_k_b_c
+        self.entries = entries[:]
+        self.entry_keys = keys.copy()
+        self.by_key = by_key.copy()
+        self.callbacks = callbacks[:]
+
+
+class _ReqExtras(dict):
+    """
+    Map each requirement to the extras that demanded it.
+    """
+
+    def markers_pass(self, req, extras=None):
+        """
+        Evaluate markers for req against each extra that
+        demanded it.
+
+        Return False if the req has a marker and fails
+        evaluation. Otherwise, return True.
+        """
+        extra_evals = (
+            req.marker.evaluate({'extra': extra})
+            for extra in self.get(req, ()) + (extras or (None,))
+        )
+        return not req.marker or any(extra_evals)
+
+
+class Environment:
+    """Searchable snapshot of distributions on a search path"""
+
+    def __init__(
+            self, search_path=None, platform=get_supported_platform(),
+            python=PY_MAJOR):
+        """Snapshot distributions available on a search path
+
+        Any distributions found on `search_path` are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.
+
+        `platform` is an optional string specifying the name of the platform
+        that platform-specific distributions must be compatible with.  If
+        unspecified, it defaults to the current platform.  `python` is an
+        optional string naming the desired version of Python (e.g. ``'3.6'``);
+        it defaults to the current version.
+
+        You may explicitly set `platform` (and/or `python`) to ``None`` if you
+        wish to map *all* distributions, not just those compatible with the
+        running platform or Python version.
+        """
+        self._distmap = {}
+        self.platform = platform
+        self.python = python
+        self.scan(search_path)
+
+    def can_add(self, dist):
+        """Is distribution `dist` acceptable for this environment?
+
+        The distribution must match the platform and python version
+        requirements specified when this environment was created, or False
+        is returned.
+        """
+        py_compat = (
+            self.python is None
+            or dist.py_version is None
+            or dist.py_version == self.python
+        )
+        return py_compat and compatible_platforms(dist.platform, self.platform)
+
+    def remove(self, dist):
+        """Remove `dist` from the environment"""
+        self._distmap[dist.key].remove(dist)
+
+    def scan(self, search_path=None):
+        """Scan `search_path` for distributions usable in this environment
+
+        Any distributions found are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.  Only distributions conforming to
+        the platform/python version defined at initialization are added.
+        """
+        if search_path is None:
+            search_path = sys.path
+
+        for item in search_path:
+            for dist in find_distributions(item):
+                self.add(dist)
+
+    def __getitem__(self, project_name):
+        """Return a newest-to-oldest list of distributions for `project_name`
+
+        Uses case-insensitive `project_name` comparison, assuming all the
+        project's distributions use their project's name converted to all
+        lowercase as their key.
+
+        """
+        distribution_key = project_name.lower()
+        return self._distmap.get(distribution_key, [])
+
+    def add(self, dist):
+        """Add `dist` if we ``can_add()`` it and it has not already been added
+        """
+        if self.can_add(dist) and dist.has_version():
+            dists = self._distmap.setdefault(dist.key, [])
+            if dist not in dists:
+                dists.append(dist)
+                dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
+
+    def best_match(
+            self, req, working_set, installer=None, replace_conflicting=False):
+        """Find distribution best matching `req` and usable on `working_set`
+
+        This calls the ``find(req)`` method of the `working_set` to see if a
+        suitable distribution is already active.  (This may raise
+        ``VersionConflict`` if an unsuitable version of the project is already
+        active in the specified `working_set`.)  If a suitable distribution
+        isn't active, this method returns the newest distribution in the
+        environment that meets the ``Requirement`` in `req`.  If no suitable
+        distribution is found, and `installer` is supplied, then the result of
+        calling the environment's ``obtain(req, installer)`` method will be
+        returned.
+        """
+        try:
+            dist = working_set.find(req)
+        except VersionConflict:
+            if not replace_conflicting:
+                raise
+            dist = None
+        if dist is not None:
+            return dist
+        for dist in self[req.key]:
+            if dist in req:
+                return dist
+        # try to download/install
+        return self.obtain(req, installer)
+
+    def obtain(self, requirement, installer=None):
+        """Obtain a distribution matching `requirement` (e.g. via download)
+
+        Obtain a distro that matches requirement (e.g. via download).  In the
+        base ``Environment`` class, this routine just returns
+        ``installer(requirement)``, unless `installer` is None, in which case
+        None is returned instead.  This method is a hook that allows subclasses
+        to attempt other ways of obtaining a distribution before falling back
+        to the `installer` argument."""
+        if installer is not None:
+            return installer(requirement)
+
+    def __iter__(self):
+        """Yield the unique project names of the available distributions"""
+        for key in self._distmap.keys():
+            if self[key]:
+                yield key
+
+    def __iadd__(self, other):
+        """In-place addition of a distribution or environment"""
+        if isinstance(other, Distribution):
+            self.add(other)
+        elif isinstance(other, Environment):
+            for project in other:
+                for dist in other[project]:
+                    self.add(dist)
+        else:
+            raise TypeError("Can't add %r to environment" % (other,))
+        return self
+
+    def __add__(self, other):
+        """Add an environment or distribution to an environment"""
+        new = self.__class__([], platform=None, python=None)
+        for env in self, other:
+            new += env
+        return new
+
+
+# XXX backward compatibility
+AvailableDistributions = Environment
+
+
+class ExtractionError(RuntimeError):
+    """An error occurred extracting a resource
+
+    The following attributes are available from instances of this exception:
+
+    manager
+        The resource manager that raised this exception
+
+    cache_path
+        The base directory for resource extraction
+
+    original_error
+        The exception instance that caused extraction to fail
+    """
+
+
+class ResourceManager:
+    """Manage resource extraction and packages"""
+    extraction_path = None
+
+    def __init__(self):
+        self.cached_files = {}
+
+    def resource_exists(self, package_or_requirement, resource_name):
+        """Does the named resource exist?"""
+        return get_provider(package_or_requirement).has_resource(resource_name)
+
+    def resource_isdir(self, package_or_requirement, resource_name):
+        """Is the named resource an existing directory?"""
+        return get_provider(package_or_requirement).resource_isdir(
+            resource_name
+        )
+
+    def resource_filename(self, package_or_requirement, resource_name):
+        """Return a true filesystem path for specified resource"""
+        return get_provider(package_or_requirement).get_resource_filename(
+            self, resource_name
+        )
+
+    def resource_stream(self, package_or_requirement, resource_name):
+        """Return a readable file-like object for specified resource"""
+        return get_provider(package_or_requirement).get_resource_stream(
+            self, resource_name
+        )
+
+    def resource_string(self, package_or_requirement, resource_name):
+        """Return specified resource as a string"""
+        return get_provider(package_or_requirement).get_resource_string(
+            self, resource_name
+        )
+
+    def resource_listdir(self, package_or_requirement, resource_name):
+        """List the contents of the named resource directory"""
+        return get_provider(package_or_requirement).resource_listdir(
+            resource_name
+        )
+
+    def extraction_error(self):
+        """Give an error message for problems extracting file(s)"""
+
+        old_exc = sys.exc_info()[1]
+        cache_path = self.extraction_path or get_default_cache()
+
+        tmpl = textwrap.dedent("""
+            Can't extract file(s) to egg cache
+
+            The following error occurred while trying to extract file(s)
+            to the Python egg cache:
+
+              {old_exc}
+
+            The Python egg cache directory is currently set to:
+
+              {cache_path}
+
+            Perhaps your account does not have write access to this directory?
+            You can change the cache directory by setting the PYTHON_EGG_CACHE
+            environment variable to point to an accessible directory.
+            """).lstrip()
+        err = ExtractionError(tmpl.format(**locals()))
+        err.manager = self
+        err.cache_path = cache_path
+        err.original_error = old_exc
+        raise err
+
+    def get_cache_path(self, archive_name, names=()):
+        """Return absolute location in cache for `archive_name` and `names`
+
+        The parent directory of the resulting path will be created if it does
+        not already exist.  `archive_name` should be the base filename of the
+        enclosing egg (which may not be the name of the enclosing zipfile!),
+        including its ".egg" extension.  `names`, if provided, should be a
+        sequence of path name parts "under" the egg's extraction location.
+
+        This method should only be called by resource providers that need to
+        obtain an extraction location, and only for names they intend to
+        extract, as it tracks the generated names for possible cleanup later.
+        """
+        extract_path = self.extraction_path or get_default_cache()
+        target_path = os.path.join(extract_path, archive_name + '-tmp', *names)
+        try:
+            _bypass_ensure_directory(target_path)
+        except Exception:
+            self.extraction_error()
+
+        self._warn_unsafe_extraction_path(extract_path)
+
+        self.cached_files[target_path] = 1
+        return target_path
+
+    @staticmethod
+    def _warn_unsafe_extraction_path(path):
+        """
+        If the default extraction path is overridden and set to an insecure
+        location, such as /tmp, it opens up an opportunity for an attacker to
+        replace an extracted file with an unauthorized payload. Warn the user
+        if a known insecure location is used.
+
+        See Distribute #375 for more details.
+        """
+        if os.name == 'nt' and not path.startswith(os.environ['windir']):
+            # On Windows, permissions are generally restrictive by default
+            #  and temp directories are not writable by other users, so
+            #  bypass the warning.
+            return
+        mode = os.stat(path).st_mode
+        if mode & stat.S_IWOTH or mode & stat.S_IWGRP:
+            msg = (
+                "%s is writable by group/others and vulnerable to attack "
+                "when "
+                "used with get_resource_filename. Consider a more secure "
+                "location (set with .set_extraction_path or the "
+                "PYTHON_EGG_CACHE environment variable)." % path
+            )
+            warnings.warn(msg, UserWarning)
+
+    def postprocess(self, tempname, filename):
+        """Perform any platform-specific postprocessing of `tempname`
+
+        This is where Mac header rewrites should be done; other platforms don't
+        have anything special they should do.
+
+        Resource providers should call this method ONLY after successfully
+        extracting a compressed resource.  They must NOT call it on resources
+        that are already in the filesystem.
+
+        `tempname` is the current (temporary) name of the file, and `filename`
+        is the name it will be renamed to by the caller after this routine
+        returns.
+        """
+
+        if os.name == 'posix':
+            # Make the resource executable
+            mode = ((os.stat(tempname).st_mode) | 0o555) & 0o7777
+            os.chmod(tempname, mode)
+
+    def set_extraction_path(self, path):
+        """Set the base path where resources will be extracted to, if needed.
+
+        If you do not call this routine before any extractions take place, the
+        path defaults to the return value of ``get_default_cache()``.  (Which
+        is based on the ``PYTHON_EGG_CACHE`` environment variable, with various
+        platform-specific fallbacks.  See that routine's documentation for more
+        details.)
+
+        Resources are extracted to subdirectories of this path based upon
+        information given by the ``IResourceProvider``.  You may set this to a
+        temporary directory, but then you must call ``cleanup_resources()`` to
+        delete the extracted files when done.  There is no guarantee that
+        ``cleanup_resources()`` will be able to remove all extracted files.
+
+        (Note: you may not change the extraction path for a given resource
+        manager once resources have been extracted, unless you first call
+        ``cleanup_resources()``.)
+        """
+        if self.cached_files:
+            raise ValueError(
+                "Can't change extraction path, files already extracted"
+            )
+
+        self.extraction_path = path
+
+    def cleanup_resources(self, force=False):
+        """
+        Delete all extracted resource files and directories, returning a list
+        of the file and directory names that could not be successfully removed.
+        This function does not have any concurrency protection, so it should
+        generally only be called when the extraction path is a temporary
+        directory exclusive to a single process.  This method is not
+        automatically called; you must call it explicitly or register it as an
+        ``atexit`` function if you wish to ensure cleanup of a temporary
+        directory used for extractions.
+        """
+        # XXX
+
+
+def get_default_cache():
+    """
+    Return the ``PYTHON_EGG_CACHE`` environment variable
+    or a platform-relevant user cache dir for an app
+    named "Python-Eggs".
+    """
+    return (
+        os.environ.get('PYTHON_EGG_CACHE')
+        or appdirs.user_cache_dir(appname='Python-Eggs')
+    )
+
+
+def safe_name(name):
+    """Convert an arbitrary string to a standard distribution name
+
+    Any runs of non-alphanumeric/. characters are replaced with a single '-'.
+    """
+    return re.sub('[^A-Za-z0-9.]+', '-', name)
+
+
+def safe_version(version):
+    """
+    Convert an arbitrary string to a standard version string
+    """
+    try:
+        # normalize the version
+        return str(packaging.version.Version(version))
+    except packaging.version.InvalidVersion:
+        version = version.replace(' ', '.')
+        return re.sub('[^A-Za-z0-9.]+', '-', version)
+
+
+def safe_extra(extra):
+    """Convert an arbitrary string to a standard 'extra' name
+
+    Any runs of non-alphanumeric characters are replaced with a single '_',
+    and the result is always lowercased.
+    """
+    return re.sub('[^A-Za-z0-9.-]+', '_', extra).lower()
+
+
+def to_filename(name):
+    """Convert a project or version name to its filename-escaped form
+
+    Any '-' characters are currently replaced with '_'.
+    """
+    return name.replace('-', '_')
+
+
+def invalid_marker(text):
+    """
+    Validate text as a PEP 508 environment marker; return an exception
+    if invalid or False otherwise.
+    """
+    try:
+        evaluate_marker(text)
+    except SyntaxError as e:
+        e.filename = None
+        e.lineno = None
+        return e
+    return False
+
+
+def evaluate_marker(text, extra=None):
+    """
+    Evaluate a PEP 508 environment marker.
+    Return a boolean indicating the marker result in this environment.
+    Raise SyntaxError if marker is invalid.
+
+    This implementation uses the 'pyparsing' module.
+    """
+    try:
+        marker = packaging.markers.Marker(text)
+        return marker.evaluate()
+    except packaging.markers.InvalidMarker as e:
+        raise SyntaxError(e)
+
+
+class NullProvider:
+    """Try to implement resources and metadata for arbitrary PEP 302 loaders"""
+
+    egg_name = None
+    egg_info = None
+    loader = None
+
+    def __init__(self, module):
+        self.loader = getattr(module, '__loader__', None)
+        self.module_path = os.path.dirname(getattr(module, '__file__', ''))
+
+    def get_resource_filename(self, manager, resource_name):
+        return self._fn(self.module_path, resource_name)
+
+    def get_resource_stream(self, manager, resource_name):
+        return io.BytesIO(self.get_resource_string(manager, resource_name))
+
+    def get_resource_string(self, manager, resource_name):
+        return self._get(self._fn(self.module_path, resource_name))
+
+    def has_resource(self, resource_name):
+        return self._has(self._fn(self.module_path, resource_name))
+
+    def _get_metadata_path(self, name):
+        return self._fn(self.egg_info, name)
+
+    def has_metadata(self, name):
+        if not self.egg_info:
+            return self.egg_info
+
+        path = self._get_metadata_path(name)
+        return self._has(path)
+
+    def get_metadata(self, name):
+        if not self.egg_info:
+            return ""
+        path = self._get_metadata_path(name)
+        value = self._get(path)
+        if six.PY2:
+            return value
+        try:
+            return value.decode('utf-8')
+        except UnicodeDecodeError as exc:
+            # Include the path in the error message to simplify
+            # troubleshooting, and without changing the exception type.
+            exc.reason += ' in {} file at path: {}'.format(name, path)
+            raise
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+    def resource_isdir(self, resource_name):
+        return self._isdir(self._fn(self.module_path, resource_name))
+
+    def metadata_isdir(self, name):
+        return self.egg_info and self._isdir(self._fn(self.egg_info, name))
+
+    def resource_listdir(self, resource_name):
+        return self._listdir(self._fn(self.module_path, resource_name))
+
+    def metadata_listdir(self, name):
+        if self.egg_info:
+            return self._listdir(self._fn(self.egg_info, name))
+        return []
+
+    def run_script(self, script_name, namespace):
+        script = 'scripts/' + script_name
+        if not self.has_metadata(script):
+            raise ResolutionError(
+                "Script {script!r} not found in metadata at {self.egg_info!r}"
+                .format(**locals()),
+            )
+        script_text = self.get_metadata(script).replace('\r\n', '\n')
+        script_text = script_text.replace('\r', '\n')
+        script_filename = self._fn(self.egg_info, script)
+        namespace['__file__'] = script_filename
+        if os.path.exists(script_filename):
+            source = open(script_filename).read()
+            code = compile(source, script_filename, 'exec')
+            exec(code, namespace, namespace)
+        else:
+            from linecache import cache
+            cache[script_filename] = (
+                len(script_text), 0, script_text.split('\n'), script_filename
+            )
+            script_code = compile(script_text, script_filename, 'exec')
+            exec(script_code, namespace, namespace)
+
+    def _has(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _isdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _listdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _fn(self, base, resource_name):
+        self._validate_resource_path(resource_name)
+        if resource_name:
+            return os.path.join(base, *resource_name.split('/'))
+        return base
+
+    @staticmethod
+    def _validate_resource_path(path):
+        """
+        Validate the resource paths according to the docs.
+        https://setuptools.readthedocs.io/en/latest/pkg_resources.html#basic-resource-access
+
+        >>> warned = getfixture('recwarn')
+        >>> warnings.simplefilter('always')
+        >>> vrp = NullProvider._validate_resource_path
+        >>> vrp('foo/bar.txt')
+        >>> bool(warned)
+        False
+        >>> vrp('../foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('/foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> vrp('foo/../../bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('foo/f../bar.txt')
+        >>> bool(warned)
+        False
+
+        Windows path separators are straight-up disallowed.
+        >>> vrp(r'\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        >>> vrp(r'C:\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        Blank values are allowed
+
+        >>> vrp('')
+        >>> bool(warned)
+        False
+
+        Non-string values are not.
+
+        >>> vrp(None)
+        Traceback (most recent call last):
+        ...
+        AttributeError: ...
+        """
+        invalid = (
+            os.path.pardir in path.split(posixpath.sep) or
+            posixpath.isabs(path) or
+            ntpath.isabs(path)
+        )
+        if not invalid:
+            return
+
+        msg = "Use of .. or absolute path in a resource path is not allowed."
+
+        # Aggressively disallow Windows absolute paths
+        if ntpath.isabs(path) and not posixpath.isabs(path):
+            raise ValueError(msg)
+
+        # for compatibility, warn; in future
+        # raise ValueError(msg)
+        warnings.warn(
+            msg[:-1] + " and will raise exceptions in a future release.",
+            DeprecationWarning,
+            stacklevel=4,
+        )
+
+    def _get(self, path):
+        if hasattr(self.loader, 'get_data'):
+            return self.loader.get_data(path)
+        raise NotImplementedError(
+            "Can't perform this operation for loaders without 'get_data()'"
+        )
+
+
+register_loader_type(object, NullProvider)
+
+
+class EggProvider(NullProvider):
+    """Provider based on a virtual filesystem"""
+
+    def __init__(self, module):
+        NullProvider.__init__(self, module)
+        self._setup_prefix()
+
+    def _setup_prefix(self):
+        # we assume here that our metadata may be nested inside a "basket"
+        # of multiple eggs; that's why we use module_path instead of .archive
+        path = self.module_path
+        old = None
+        while path != old:
+            if _is_egg_path(path):
+                self.egg_name = os.path.basename(path)
+                self.egg_info = os.path.join(path, 'EGG-INFO')
+                self.egg_root = path
+                break
+            old = path
+            path, base = os.path.split(path)
+
+
+class DefaultProvider(EggProvider):
+    """Provides access to package resources in the filesystem"""
+
+    def _has(self, path):
+        return os.path.exists(path)
+
+    def _isdir(self, path):
+        return os.path.isdir(path)
+
+    def _listdir(self, path):
+        return os.listdir(path)
+
+    def get_resource_stream(self, manager, resource_name):
+        return open(self._fn(self.module_path, resource_name), 'rb')
+
+    def _get(self, path):
+        with open(path, 'rb') as stream:
+            return stream.read()
+
+    @classmethod
+    def _register(cls):
+        loader_names = 'SourceFileLoader', 'SourcelessFileLoader',
+        for name in loader_names:
+            loader_cls = getattr(importlib_machinery, name, type(None))
+            register_loader_type(loader_cls, cls)
+
+
+DefaultProvider._register()
+
+
+class EmptyProvider(NullProvider):
+    """Provider that returns nothing for all requests"""
+
+    module_path = None
+
+    _isdir = _has = lambda self, path: False
+
+    def _get(self, path):
+        return ''
+
+    def _listdir(self, path):
+        return []
+
+    def __init__(self):
+        pass
+
+
+empty_provider = EmptyProvider()
+
+
+class ZipManifests(dict):
+    """
+    zip manifest builder
+    """
+
+    @classmethod
+    def build(cls, path):
+        """
+        Build a dictionary similar to the zipimport directory
+        caches, except instead of tuples, store ZipInfo objects.
+
+        Use a platform-specific path separator (os.sep) for the path keys
+        for compatibility with pypy on Windows.
+        """
+        with zipfile.ZipFile(path) as zfile:
+            items = (
+                (
+                    name.replace('/', os.sep),
+                    zfile.getinfo(name),
+                )
+                for name in zfile.namelist()
+            )
+            return dict(items)
+
+    load = build
+
+
+class MemoizedZipManifests(ZipManifests):
+    """
+    Memoized zipfile manifests.
+    """
+    manifest_mod = collections.namedtuple('manifest_mod', 'manifest mtime')
+
+    def load(self, path):
+        """
+        Load a manifest at path or return a suitable manifest already loaded.
+        """
+        path = os.path.normpath(path)
+        mtime = os.stat(path).st_mtime
+
+        if path not in self or self[path].mtime != mtime:
+            manifest = self.build(path)
+            self[path] = self.manifest_mod(manifest, mtime)
+
+        return self[path].manifest
+
+
+class ZipProvider(EggProvider):
+    """Resource support for zips and eggs"""
+
+    eagers = None
+    _zip_manifests = MemoizedZipManifests()
+
+    def __init__(self, module):
+        EggProvider.__init__(self, module)
+        self.zip_pre = self.loader.archive + os.sep
+
+    def _zipinfo_name(self, fspath):
+        # Convert a virtual filename (full path to file) into a zipfile subpath
+        # usable with the zipimport directory cache for our target archive
+        fspath = fspath.rstrip(os.sep)
+        if fspath == self.loader.archive:
+            return ''
+        if fspath.startswith(self.zip_pre):
+            return fspath[len(self.zip_pre):]
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.zip_pre)
+        )
+
+    def _parts(self, zip_path):
+        # Convert a zipfile subpath into an egg-relative path part list.
+        # pseudo-fs path
+        fspath = self.zip_pre + zip_path
+        if fspath.startswith(self.egg_root + os.sep):
+            return fspath[len(self.egg_root) + 1:].split(os.sep)
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.egg_root)
+        )
+
+    @property
+    def zipinfo(self):
+        return self._zip_manifests.load(self.loader.archive)
+
+    def get_resource_filename(self, manager, resource_name):
+        if not self.egg_name:
+            raise NotImplementedError(
+                "resource_filename() only supported for .egg, not .zip"
+            )
+        # no need to lock for extraction, since we use temp names
+        zip_path = self._resource_to_zip(resource_name)
+        eagers = self._get_eager_resources()
+        if '/'.join(self._parts(zip_path)) in eagers:
+            for name in eagers:
+                self._extract_resource(manager, self._eager_to_zip(name))
+        return self._extract_resource(manager, zip_path)
+
+    @staticmethod
+    def _get_date_and_size(zip_stat):
+        size = zip_stat.file_size
+        # ymdhms+wday, yday, dst
+        date_time = zip_stat.date_time + (0, 0, -1)
+        # 1980 offset already done
+        timestamp = time.mktime(date_time)
+        return timestamp, size
+
+    def _extract_resource(self, manager, zip_path):
+
+        if zip_path in self._index():
+            for name in self._index()[zip_path]:
+                last = self._extract_resource(
+                    manager, os.path.join(zip_path, name)
+                )
+            # return the extracted directory name
+            return os.path.dirname(last)
+
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+
+        if not WRITE_SUPPORT:
+            raise IOError('"os.rename" and "os.unlink" are not supported '
+                          'on this platform')
+        try:
+
+            real_path = manager.get_cache_path(
+                self.egg_name, self._parts(zip_path)
+            )
+
+            if self._is_current(real_path, zip_path):
+                return real_path
+
+            outf, tmpnam = _mkstemp(
+                ".$extract",
+                dir=os.path.dirname(real_path),
+            )
+            os.write(outf, self.loader.get_data(zip_path))
+            os.close(outf)
+            utime(tmpnam, (timestamp, timestamp))
+            manager.postprocess(tmpnam, real_path)
+
+            try:
+                rename(tmpnam, real_path)
+
+            except os.error:
+                if os.path.isfile(real_path):
+                    if self._is_current(real_path, zip_path):
+                        # the file became current since it was checked above,
+                        #  so proceed.
+                        return real_path
+                    # Windows, del old file and retry
+                    elif os.name == 'nt':
+                        unlink(real_path)
+                        rename(tmpnam, real_path)
+                        return real_path
+                raise
+
+        except os.error:
+            # report a user-friendly error
+            manager.extraction_error()
+
+        return real_path
+
+    def _is_current(self, file_path, zip_path):
+        """
+        Return True if the file_path is current for this zip_path
+        """
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+        if not os.path.isfile(file_path):
+            return False
+        stat = os.stat(file_path)
+        if stat.st_size != size or stat.st_mtime != timestamp:
+            return False
+        # check that the contents match
+        zip_contents = self.loader.get_data(zip_path)
+        with open(file_path, 'rb') as f:
+            file_contents = f.read()
+        return zip_contents == file_contents
+
+    def _get_eager_resources(self):
+        if self.eagers is None:
+            eagers = []
+            for name in ('native_libs.txt', 'eager_resources.txt'):
+                if self.has_metadata(name):
+                    eagers.extend(self.get_metadata_lines(name))
+            self.eagers = eagers
+        return self.eagers
+
+    def _index(self):
+        try:
+            return self._dirindex
+        except AttributeError:
+            ind = {}
+            for path in self.zipinfo:
+                parts = path.split(os.sep)
+                while parts:
+                    parent = os.sep.join(parts[:-1])
+                    if parent in ind:
+                        ind[parent].append(parts[-1])
+                        break
+                    else:
+                        ind[parent] = [parts.pop()]
+            self._dirindex = ind
+            return ind
+
+    def _has(self, fspath):
+        zip_path = self._zipinfo_name(fspath)
+        return zip_path in self.zipinfo or zip_path in self._index()
+
+    def _isdir(self, fspath):
+        return self._zipinfo_name(fspath) in self._index()
+
+    def _listdir(self, fspath):
+        return list(self._index().get(self._zipinfo_name(fspath), ()))
+
+    def _eager_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.egg_root, resource_name))
+
+    def _resource_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.module_path, resource_name))
+
+
+register_loader_type(zipimport.zipimporter, ZipProvider)
+
+
+class FileMetadata(EmptyProvider):
+    """Metadata handler for standalone PKG-INFO files
+
+    Usage::
+
+        metadata = FileMetadata("/path/to/PKG-INFO")
+
+    This provider rejects all data and metadata requests except for PKG-INFO,
+    which is treated as existing, and will be the contents of the file at
+    the provided location.
+    """
+
+    def __init__(self, path):
+        self.path = path
+
+    def _get_metadata_path(self, name):
+        return self.path
+
+    def has_metadata(self, name):
+        return name == 'PKG-INFO' and os.path.isfile(self.path)
+
+    def get_metadata(self, name):
+        if name != 'PKG-INFO':
+            raise KeyError("No metadata except PKG-INFO is available")
+
+        with io.open(self.path, encoding='utf-8', errors="replace") as f:
+            metadata = f.read()
+        self._warn_on_replacement(metadata)
+        return metadata
+
+    def _warn_on_replacement(self, metadata):
+        # Python 2.7 compat for: replacement_char = '�'
+        replacement_char = b'\xef\xbf\xbd'.decode('utf-8')
+        if replacement_char in metadata:
+            tmpl = "{self.path} could not be properly decoded in UTF-8"
+            msg = tmpl.format(**locals())
+            warnings.warn(msg)
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+
+class PathMetadata(DefaultProvider):
+    """Metadata provider for egg directories
+
+    Usage::
+
+        # Development eggs:
+
+        egg_info = "/path/to/PackageName.egg-info"
+        base_dir = os.path.dirname(egg_info)
+        metadata = PathMetadata(base_dir, egg_info)
+        dist_name = os.path.splitext(os.path.basename(egg_info))[0]
+        dist = Distribution(basedir, project_name=dist_name, metadata=metadata)
+
+        # Unpacked egg directories:
+
+        egg_path = "/path/to/PackageName-ver-pyver-etc.egg"
+        metadata = PathMetadata(egg_path, os.path.join(egg_path,'EGG-INFO'))
+        dist = Distribution.from_filename(egg_path, metadata=metadata)
+    """
+
+    def __init__(self, path, egg_info):
+        self.module_path = path
+        self.egg_info = egg_info
+
+
+class EggMetadata(ZipProvider):
+    """Metadata provider for .egg files"""
+
+    def __init__(self, importer):
+        """Create a metadata provider from a zipimporter"""
+
+        self.zip_pre = importer.archive + os.sep
+        self.loader = importer
+        if importer.prefix:
+            self.module_path = os.path.join(importer.archive, importer.prefix)
+        else:
+            self.module_path = importer.archive
+        self._setup_prefix()
+
+
+_declare_state('dict', _distribution_finders={})
+
+
+def register_finder(importer_type, distribution_finder):
+    """Register `distribution_finder` to find distributions in sys.path items
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `distribution_finder` is a callable that, passed a path
+    item and the importer instance, yields ``Distribution`` instances found on
+    that path item.  See ``pkg_resources.find_on_path`` for an example."""
+    _distribution_finders[importer_type] = distribution_finder
+
+
+def find_distributions(path_item, only=False):
+    """Yield distributions accessible via `path_item`"""
+    importer = get_importer(path_item)
+    finder = _find_adapter(_distribution_finders, importer)
+    return finder(importer, path_item, only)
+
+
+def find_eggs_in_zip(importer, path_item, only=False):
+    """
+    Find eggs in zip files; possibly multiple nested eggs.
+    """
+    if importer.archive.endswith('.whl'):
+        # wheels are not supported with this finder
+        # they don't have PKG-INFO metadata, and won't ever contain eggs
+        return
+    metadata = EggMetadata(importer)
+    if metadata.has_metadata('PKG-INFO'):
+        yield Distribution.from_filename(path_item, metadata=metadata)
+    if only:
+        # don't yield nested distros
+        return
+    for subitem in metadata.resource_listdir(''):
+        if _is_egg_path(subitem):
+            subpath = os.path.join(path_item, subitem)
+            dists = find_eggs_in_zip(zipimport.zipimporter(subpath), subpath)
+            for dist in dists:
+                yield dist
+        elif subitem.lower().endswith('.dist-info'):
+            subpath = os.path.join(path_item, subitem)
+            submeta = EggMetadata(zipimport.zipimporter(subpath))
+            submeta.egg_info = subpath
+            yield Distribution.from_location(path_item, subitem, submeta)
+
+
+register_finder(zipimport.zipimporter, find_eggs_in_zip)
+
+
+def find_nothing(importer, path_item, only=False):
+    return ()
+
+
+register_finder(object, find_nothing)
+
+
+def _by_version_descending(names):
+    """
+    Given a list of filenames, return them in descending order
+    by version number.
+
+    >>> names = 'bar', 'foo', 'Python-2.7.10.egg', 'Python-2.7.2.egg'
+    >>> _by_version_descending(names)
+    ['Python-2.7.10.egg', 'Python-2.7.2.egg', 'foo', 'bar']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.egg', 'Setuptools-1.2.3b1.egg']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.post1.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.post1.egg', 'Setuptools-1.2.3b1.egg']
+    """
+    def _by_version(name):
+        """
+        Parse each component of the filename
+        """
+        name, ext = os.path.splitext(name)
+        parts = itertools.chain(name.split('-'), [ext])
+        return [packaging.version.parse(part) for part in parts]
+
+    return sorted(names, key=_by_version, reverse=True)
+
+
+def find_on_path(importer, path_item, only=False):
+    """Yield distributions accessible on a sys.path directory"""
+    path_item = _normalize_cached(path_item)
+
+    if _is_unpacked_egg(path_item):
+        yield Distribution.from_filename(
+            path_item, metadata=PathMetadata(
+                path_item, os.path.join(path_item, 'EGG-INFO')
+            )
+        )
+        return
+
+    entries = safe_listdir(path_item)
+
+    # for performance, before sorting by version,
+    # screen entries for only those that will yield
+    # distributions
+    filtered = (
+        entry
+        for entry in entries
+        if dist_factory(path_item, entry, only)
+    )
+
+    # scan for .egg and .egg-info in directory
+    path_item_entries = _by_version_descending(filtered)
+    for entry in path_item_entries:
+        fullpath = os.path.join(path_item, entry)
+        factory = dist_factory(path_item, entry, only)
+        for dist in factory(fullpath):
+            yield dist
+
+
+def dist_factory(path_item, entry, only):
+    """
+    Return a dist_factory for a path_item and entry
+    """
+    lower = entry.lower()
+    is_meta = any(map(lower.endswith, ('.egg-info', '.dist-info')))
+    return (
+        distributions_from_metadata
+        if is_meta else
+        find_distributions
+        if not only and _is_egg_path(entry) else
+        resolve_egg_link
+        if not only and lower.endswith('.egg-link') else
+        NoDists()
+    )
+
+
+class NoDists:
+    """
+    >>> bool(NoDists())
+    False
+
+    >>> list(NoDists()('anything'))
+    []
+    """
+    def __bool__(self):
+        return False
+    if six.PY2:
+        __nonzero__ = __bool__
+
+    def __call__(self, fullpath):
+        return iter(())
+
+
+def safe_listdir(path):
+    """
+    Attempt to list contents of path, but suppress some exceptions.
+    """
+    try:
+        return os.listdir(path)
+    except (PermissionError, NotADirectoryError):
+        pass
+    except OSError as e:
+        # Ignore the directory if does not exist, not a directory or
+        # permission denied
+        ignorable = (
+            e.errno in (errno.ENOTDIR, errno.EACCES, errno.ENOENT)
+            # Python 2 on Windows needs to be handled this way :(
+            or getattr(e, "winerror", None) == 267
+        )
+        if not ignorable:
+            raise
+    return ()
+
+
+def distributions_from_metadata(path):
+    root = os.path.dirname(path)
+    if os.path.isdir(path):
+        if len(os.listdir(path)) == 0:
+            # empty metadata dir; skip
+            return
+        metadata = PathMetadata(root, path)
+    else:
+        metadata = FileMetadata(path)
+    entry = os.path.basename(path)
+    yield Distribution.from_location(
+        root, entry, metadata, precedence=DEVELOP_DIST,
+    )
+
+
+def non_empty_lines(path):
+    """
+    Yield non-empty lines from file at path
+    """
+    with open(path) as f:
+        for line in f:
+            line = line.strip()
+            if line:
+                yield line
+
+
+def resolve_egg_link(path):
+    """
+    Given a path to an .egg-link, resolve distributions
+    present in the referenced path.
+    """
+    referenced_paths = non_empty_lines(path)
+    resolved_paths = (
+        os.path.join(os.path.dirname(path), ref)
+        for ref in referenced_paths
+    )
+    dist_groups = map(find_distributions, resolved_paths)
+    return next(dist_groups, ())
+
+
+register_finder(pkgutil.ImpImporter, find_on_path)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_finder(importlib_machinery.FileFinder, find_on_path)
+
+_declare_state('dict', _namespace_handlers={})
+_declare_state('dict', _namespace_packages={})
+
+
+def register_namespace_handler(importer_type, namespace_handler):
+    """Register `namespace_handler` to declare namespace packages
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `namespace_handler` is a callable like this::
+
+        def namespace_handler(importer, path_entry, moduleName, module):
+            # return a path_entry to use for child packages
+
+    Namespace handlers are only called if the importer object has already
+    agreed that it can handle the relevant path item, and they should only
+    return a subpath if the module __path__ does not already contain an
+    equivalent subpath.  For an example namespace handler, see
+    ``pkg_resources.file_ns_handler``.
+    """
+    _namespace_handlers[importer_type] = namespace_handler
+
+
+def _handle_ns(packageName, path_item):
+    """Ensure that named package includes a subpath of path_item (if needed)"""
+
+    importer = get_importer(path_item)
+    if importer is None:
+        return None
+
+    # capture warnings due to #1111
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore")
+        loader = importer.find_module(packageName)
+
+    if loader is None:
+        return None
+    module = sys.modules.get(packageName)
+    if module is None:
+        module = sys.modules[packageName] = types.ModuleType(packageName)
+        module.__path__ = []
+        _set_parent_ns(packageName)
+    elif not hasattr(module, '__path__'):
+        raise TypeError("Not a package:", packageName)
+    handler = _find_adapter(_namespace_handlers, importer)
+    subpath = handler(importer, path_item, packageName, module)
+    if subpath is not None:
+        path = module.__path__
+        path.append(subpath)
+        loader.load_module(packageName)
+        _rebuild_mod_path(path, packageName, module)
+    return subpath
+
+
+def _rebuild_mod_path(orig_path, package_name, module):
+    """
+    Rebuild module.__path__ ensuring that all entries are ordered
+    corresponding to their sys.path order
+    """
+    sys_path = [_normalize_cached(p) for p in sys.path]
+
+    def safe_sys_path_index(entry):
+        """
+        Workaround for #520 and #513.
+        """
+        try:
+            return sys_path.index(entry)
+        except ValueError:
+            return float('inf')
+
+    def position_in_sys_path(path):
+        """
+        Return the ordinal of the path based on its position in sys.path
+        """
+        path_parts = path.split(os.sep)
+        module_parts = package_name.count('.') + 1
+        parts = path_parts[:-module_parts]
+        return safe_sys_path_index(_normalize_cached(os.sep.join(parts)))
+
+    new_path = sorted(orig_path, key=position_in_sys_path)
+    new_path = [_normalize_cached(p) for p in new_path]
+
+    if isinstance(module.__path__, list):
+        module.__path__[:] = new_path
+    else:
+        module.__path__ = new_path
+
+
+def declare_namespace(packageName):
+    """Declare that package 'packageName' is a namespace package"""
+
+    _imp.acquire_lock()
+    try:
+        if packageName in _namespace_packages:
+            return
+
+        path = sys.path
+        parent, _, _ = packageName.rpartition('.')
+
+        if parent:
+            declare_namespace(parent)
+            if parent not in _namespace_packages:
+                __import__(parent)
+            try:
+                path = sys.modules[parent].__path__
+            except AttributeError:
+                raise TypeError("Not a package:", parent)
+
+        # Track what packages are namespaces, so when new path items are added,
+        # they can be updated
+        _namespace_packages.setdefault(parent or None, []).append(packageName)
+        _namespace_packages.setdefault(packageName, [])
+
+        for path_item in path:
+            # Ensure all the parent's path items are reflected in the child,
+            # if they apply
+            _handle_ns(packageName, path_item)
+
+    finally:
+        _imp.release_lock()
+
+
+def fixup_namespace_packages(path_item, parent=None):
+    """Ensure that previously-declared namespace packages include path_item"""
+    _imp.acquire_lock()
+    try:
+        for package in _namespace_packages.get(parent, ()):
+            subpath = _handle_ns(package, path_item)
+            if subpath:
+                fixup_namespace_packages(subpath, package)
+    finally:
+        _imp.release_lock()
+
+
+def file_ns_handler(importer, path_item, packageName, module):
+    """Compute an ns-package subpath for a filesystem or zipfile importer"""
+
+    subpath = os.path.join(path_item, packageName.split('.')[-1])
+    normalized = _normalize_cached(subpath)
+    for item in module.__path__:
+        if _normalize_cached(item) == normalized:
+            break
+    else:
+        # Only return the path if it's not already there
+        return subpath
+
+
+register_namespace_handler(pkgutil.ImpImporter, file_ns_handler)
+register_namespace_handler(zipimport.zipimporter, file_ns_handler)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_namespace_handler(importlib_machinery.FileFinder, file_ns_handler)
+
+
+def null_ns_handler(importer, path_item, packageName, module):
+    return None
+
+
+register_namespace_handler(object, null_ns_handler)
+
+
+def normalize_path(filename):
+    """Normalize a file/dir name for comparison purposes"""
+    return os.path.normcase(os.path.realpath(os.path.normpath(_cygwin_patch(filename))))
+
+
+def _cygwin_patch(filename):  # pragma: nocover
+    """
+    Contrary to POSIX 2008, on Cygwin, getcwd (3) contains
+    symlink components. Using
+    os.path.abspath() works around this limitation. A fix in os.getcwd()
+    would probably better, in Cygwin even more so, except
+    that this seems to be by design...
+    """
+    return os.path.abspath(filename) if sys.platform == 'cygwin' else filename
+
+
+def _normalize_cached(filename, _cache={}):
+    try:
+        return _cache[filename]
+    except KeyError:
+        _cache[filename] = result = normalize_path(filename)
+        return result
+
+
+def _is_egg_path(path):
+    """
+    Determine if given path appears to be an egg.
+    """
+    return path.lower().endswith('.egg')
+
+
+def _is_unpacked_egg(path):
+    """
+    Determine if given path appears to be an unpacked egg.
+    """
+    return (
+        _is_egg_path(path) and
+        os.path.isfile(os.path.join(path, 'EGG-INFO', 'PKG-INFO'))
+    )
+
+
+def _set_parent_ns(packageName):
+    parts = packageName.split('.')
+    name = parts.pop()
+    if parts:
+        parent = '.'.join(parts)
+        setattr(sys.modules[parent], name, sys.modules[packageName])
+
+
+def yield_lines(strs):
+    """Yield non-empty/non-comment lines of a string or sequence"""
+    if isinstance(strs, six.string_types):
+        for s in strs.splitlines():
+            s = s.strip()
+            # skip blank lines/comments
+            if s and not s.startswith('#'):
+                yield s
+    else:
+        for ss in strs:
+            for s in yield_lines(ss):
+                yield s
+
+
+MODULE = re.compile(r"\w+(\.\w+)*$").match
+EGG_NAME = re.compile(
+    r"""
+    (?P<name>[^-]+) (
+        -(?P<ver>[^-]+) (
+            -py(?P<pyver>[^-]+) (
+                -(?P<plat>.+)
+            )?
+        )?
+    )?
+    """,
+    re.VERBOSE | re.IGNORECASE,
+).match
+
+
+class EntryPoint:
+    """Object representing an advertised importable object"""
+
+    def __init__(self, name, module_name, attrs=(), extras=(), dist=None):
+        if not MODULE(module_name):
+            raise ValueError("Invalid module name", module_name)
+        self.name = name
+        self.module_name = module_name
+        self.attrs = tuple(attrs)
+        self.extras = tuple(extras)
+        self.dist = dist
+
+    def __str__(self):
+        s = "%s = %s" % (self.name, self.module_name)
+        if self.attrs:
+            s += ':' + '.'.join(self.attrs)
+        if self.extras:
+            s += ' [%s]' % ','.join(self.extras)
+        return s
+
+    def __repr__(self):
+        return "EntryPoint.parse(%r)" % str(self)
+
+    def load(self, require=True, *args, **kwargs):
+        """
+        Require packages for this EntryPoint, then resolve it.
+        """
+        if not require or args or kwargs:
+            warnings.warn(
+                "Parameters to load are deprecated.  Call .resolve and "
+                ".require separately.",
+                PkgResourcesDeprecationWarning,
+                stacklevel=2,
+            )
+        if require:
+            self.require(*args, **kwargs)
+        return self.resolve()
+
+    def resolve(self):
+        """
+        Resolve the entry point from its module and attrs.
+        """
+        module = __import__(self.module_name, fromlist=['__name__'], level=0)
+        try:
+            return functools.reduce(getattr, self.attrs, module)
+        except AttributeError as exc:
+            raise ImportError(str(exc))
+
+    def require(self, env=None, installer=None):
+        if self.extras and not self.dist:
+            raise UnknownExtra("Can't require() without a distribution", self)
+
+        # Get the requirements for this entry point with all its extras and
+        # then resolve them. We have to pass `extras` along when resolving so
+        # that the working set knows what extras we want. Otherwise, for
+        # dist-info distributions, the working set will assume that the
+        # requirements for that extra are purely optional and skip over them.
+        reqs = self.dist.requires(self.extras)
+        items = working_set.resolve(reqs, env, installer, extras=self.extras)
+        list(map(working_set.add, items))
+
+    pattern = re.compile(
+        r'\s*'
+        r'(?P<name>.+?)\s*'
+        r'=\s*'
+        r'(?P<module>[\w.]+)\s*'
+        r'(:\s*(?P<attr>[\w.]+))?\s*'
+        r'(?P<extras>\[.*\])?\s*$'
+    )
+
+    @classmethod
+    def parse(cls, src, dist=None):
+        """Parse a single entry point from string `src`
+
+        Entry point syntax follows the form::
+
+            name = some.module:some.attr [extra1, extra2]
+
+        The entry name and module name are required, but the ``:attrs`` and
+        ``[extras]`` parts are optional
+        """
+        m = cls.pattern.match(src)
+        if not m:
+            msg = "EntryPoint must be in 'name=module:attrs [extras]' format"
+            raise ValueError(msg, src)
+        res = m.groupdict()
+        extras = cls._parse_extras(res['extras'])
+        attrs = res['attr'].split('.') if res['attr'] else ()
+        return cls(res['name'], res['module'], attrs, extras, dist)
+
+    @classmethod
+    def _parse_extras(cls, extras_spec):
+        if not extras_spec:
+            return ()
+        req = Requirement.parse('x' + extras_spec)
+        if req.specs:
+            raise ValueError()
+        return req.extras
+
+    @classmethod
+    def parse_group(cls, group, lines, dist=None):
+        """Parse an entry point group"""
+        if not MODULE(group):
+            raise ValueError("Invalid group name", group)
+        this = {}
+        for line in yield_lines(lines):
+            ep = cls.parse(line, dist)
+            if ep.name in this:
+                raise ValueError("Duplicate entry point", group, ep.name)
+            this[ep.name] = ep
+        return this
+
+    @classmethod
+    def parse_map(cls, data, dist=None):
+        """Parse a map of entry point groups"""
+        if isinstance(data, dict):
+            data = data.items()
+        else:
+            data = split_sections(data)
+        maps = {}
+        for group, lines in data:
+            if group is None:
+                if not lines:
+                    continue
+                raise ValueError("Entry points must be listed in groups")
+            group = group.strip()
+            if group in maps:
+                raise ValueError("Duplicate group name", group)
+            maps[group] = cls.parse_group(group, lines, dist)
+        return maps
+
+
+def _remove_md5_fragment(location):
+    if not location:
+        return ''
+    parsed = urllib.parse.urlparse(location)
+    if parsed[-1].startswith('md5='):
+        return urllib.parse.urlunparse(parsed[:-1] + ('',))
+    return location
+
+
+def _version_from_file(lines):
+    """
+    Given an iterable of lines from a Metadata file, return
+    the value of the Version field, if present, or None otherwise.
+    """
+    def is_version_line(line):
+        return line.lower().startswith('version:')
+    version_lines = filter(is_version_line, lines)
+    line = next(iter(version_lines), '')
+    _, _, value = line.partition(':')
+    return safe_version(value.strip()) or None
+
+
+class Distribution:
+    """Wrap an actual or potential sys.path entry w/metadata"""
+    PKG_INFO = 'PKG-INFO'
+
+    def __init__(
+            self, location=None, metadata=None, project_name=None,
+            version=None, py_version=PY_MAJOR, platform=None,
+            precedence=EGG_DIST):
+        self.project_name = safe_name(project_name or 'Unknown')
+        if version is not None:
+            self._version = safe_version(version)
+        self.py_version = py_version
+        self.platform = platform
+        self.location = location
+        self.precedence = precedence
+        self._provider = metadata or empty_provider
+
+    @classmethod
+    def from_location(cls, location, basename, metadata=None, **kw):
+        project_name, version, py_version, platform = [None] * 4
+        basename, ext = os.path.splitext(basename)
+        if ext.lower() in _distributionImpl:
+            cls = _distributionImpl[ext.lower()]
+
+            match = EGG_NAME(basename)
+            if match:
+                project_name, version, py_version, platform = match.group(
+                    'name', 'ver', 'pyver', 'plat'
+                )
+        return cls(
+            location, metadata, project_name=project_name, version=version,
+            py_version=py_version, platform=platform, **kw
+        )._reload_version()
+
+    def _reload_version(self):
+        return self
+
+    @property
+    def hashcmp(self):
+        return (
+            self.parsed_version,
+            self.precedence,
+            self.key,
+            _remove_md5_fragment(self.location),
+            self.py_version or '',
+            self.platform or '',
+        )
+
+    def __hash__(self):
+        return hash(self.hashcmp)
+
+    def __lt__(self, other):
+        return self.hashcmp < other.hashcmp
+
+    def __le__(self, other):
+        return self.hashcmp <= other.hashcmp
+
+    def __gt__(self, other):
+        return self.hashcmp > other.hashcmp
+
+    def __ge__(self, other):
+        return self.hashcmp >= other.hashcmp
+
+    def __eq__(self, other):
+        if not isinstance(other, self.__class__):
+            # It's not a Distribution, so they are not equal
+            return False
+        return self.hashcmp == other.hashcmp
+
+    def __ne__(self, other):
+        return not self == other
+
+    # These properties have to be lazy so that we don't have to load any
+    # metadata until/unless it's actually needed.  (i.e., some distributions
+    # may not know their name or version without loading PKG-INFO)
+
+    @property
+    def key(self):
+        try:
+            return self._key
+        except AttributeError:
+            self._key = key = self.project_name.lower()
+            return key
+
+    @property
+    def parsed_version(self):
+        if not hasattr(self, "_parsed_version"):
+            self._parsed_version = parse_version(self.version)
+
+        return self._parsed_version
+
+    def _warn_legacy_version(self):
+        LV = packaging.version.LegacyVersion
+        is_legacy = isinstance(self._parsed_version, LV)
+        if not is_legacy:
+            return
+
+        # While an empty version is technically a legacy version and
+        # is not a valid PEP 440 version, it's also unlikely to
+        # actually come from someone and instead it is more likely that
+        # it comes from setuptools attempting to parse a filename and
+        # including it in the list. So for that we'll gate this warning
+        # on if the version is anything at all or not.
+        if not self.version:
+            return
+
+        tmpl = textwrap.dedent("""
+            '{project_name} ({version})' is being parsed as a legacy,
+            non PEP 440,
+            version. You may find odd behavior and sort order.
+            In particular it will be sorted as less than 0.0. It
+            is recommended to migrate to PEP 440 compatible
+            versions.
+            """).strip().replace('\n', ' ')
+
+        warnings.warn(tmpl.format(**vars(self)), PEP440Warning)
+
+    @property
+    def version(self):
+        try:
+            return self._version
+        except AttributeError:
+            version = self._get_version()
+            if version is None:
+                path = self._get_metadata_path_for_display(self.PKG_INFO)
+                msg = (
+                    "Missing 'Version:' header and/or {} file at path: {}"
+                ).format(self.PKG_INFO, path)
+                raise ValueError(msg, self)
+
+            return version
+
+    @property
+    def _dep_map(self):
+        """
+        A map of extra to its list of (direct) requirements
+        for this distribution, including the null extra.
+        """
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._filter_extras(self._build_dep_map())
+        return self.__dep_map
+
+    @staticmethod
+    def _filter_extras(dm):
+        """
+        Given a mapping of extras to dependencies, strip off
+        environment markers and filter out any dependencies
+        not matching the markers.
+        """
+        for extra in list(filter(None, dm)):
+            new_extra = extra
+            reqs = dm.pop(extra)
+            new_extra, _, marker = extra.partition(':')
+            fails_marker = marker and (
+                invalid_marker(marker)
+                or not evaluate_marker(marker)
+            )
+            if fails_marker:
+                reqs = []
+            new_extra = safe_extra(new_extra) or None
+
+            dm.setdefault(new_extra, []).extend(reqs)
+        return dm
+
+    def _build_dep_map(self):
+        dm = {}
+        for name in 'requires.txt', 'depends.txt':
+            for extra, reqs in split_sections(self._get_metadata(name)):
+                dm.setdefault(extra, []).extend(parse_requirements(reqs))
+        return dm
+
+    def requires(self, extras=()):
+        """List of Requirements needed for this distro if `extras` are used"""
+        dm = self._dep_map
+        deps = []
+        deps.extend(dm.get(None, ()))
+        for ext in extras:
+            try:
+                deps.extend(dm[safe_extra(ext)])
+            except KeyError:
+                raise UnknownExtra(
+                    "%s has no such extra feature %r" % (self, ext)
+                )
+        return deps
+
+    def _get_metadata_path_for_display(self, name):
+        """
+        Return the path to the given metadata file, if available.
+        """
+        try:
+            # We need to access _get_metadata_path() on the provider object
+            # directly rather than through this class's __getattr__()
+            # since _get_metadata_path() is marked private.
+            path = self._provider._get_metadata_path(name)
+
+        # Handle exceptions e.g. in case the distribution's metadata
+        # provider doesn't support _get_metadata_path().
+        except Exception:
+            return '[could not detect]'
+
+        return path
+
+    def _get_metadata(self, name):
+        if self.has_metadata(name):
+            for line in self.get_metadata_lines(name):
+                yield line
+
+    def _get_version(self):
+        lines = self._get_metadata(self.PKG_INFO)
+        version = _version_from_file(lines)
+
+        return version
+
+    def activate(self, path=None, replace=False):
+        """Ensure distribution is importable on `path` (default=sys.path)"""
+        if path is None:
+            path = sys.path
+        self.insert_on(path, replace=replace)
+        if path is sys.path:
+            fixup_namespace_packages(self.location)
+            for pkg in self._get_metadata('namespace_packages.txt'):
+                if pkg in sys.modules:
+                    declare_namespace(pkg)
+
+    def egg_name(self):
+        """Return what this distribution's standard .egg filename should be"""
+        filename = "%s-%s-py%s" % (
+            to_filename(self.project_name), to_filename(self.version),
+            self.py_version or PY_MAJOR
+        )
+
+        if self.platform:
+            filename += '-' + self.platform
+        return filename
+
+    def __repr__(self):
+        if self.location:
+            return "%s (%s)" % (self, self.location)
+        else:
+            return str(self)
+
+    def __str__(self):
+        try:
+            version = getattr(self, 'version', None)
+        except ValueError:
+            version = None
+        version = version or "[unknown version]"
+        return "%s %s" % (self.project_name, version)
+
+    def __getattr__(self, attr):
+        """Delegate all unrecognized public attributes to .metadata provider"""
+        if attr.startswith('_'):
+            raise AttributeError(attr)
+        return getattr(self._provider, attr)
+
+    def __dir__(self):
+        return list(
+            set(super(Distribution, self).__dir__())
+            | set(
+                attr for attr in self._provider.__dir__()
+                if not attr.startswith('_')
+            )
+        )
+
+    if not hasattr(object, '__dir__'):
+        # python 2.7 not supported
+        del __dir__
+
+    @classmethod
+    def from_filename(cls, filename, metadata=None, **kw):
+        return cls.from_location(
+            _normalize_cached(filename), os.path.basename(filename), metadata,
+            **kw
+        )
+
+    def as_requirement(self):
+        """Return a ``Requirement`` that matches this distribution exactly"""
+        if isinstance(self.parsed_version, packaging.version.Version):
+            spec = "%s==%s" % (self.project_name, self.parsed_version)
+        else:
+            spec = "%s===%s" % (self.project_name, self.parsed_version)
+
+        return Requirement.parse(spec)
+
+    def load_entry_point(self, group, name):
+        """Return the `name` entry point of `group` or raise ImportError"""
+        ep = self.get_entry_info(group, name)
+        if ep is None:
+            raise ImportError("Entry point %r not found" % ((group, name),))
+        return ep.load()
+
+    def get_entry_map(self, group=None):
+        """Return the entry point map for `group`, or the full entry map"""
+        try:
+            ep_map = self._ep_map
+        except AttributeError:
+            ep_map = self._ep_map = EntryPoint.parse_map(
+                self._get_metadata('entry_points.txt'), self
+            )
+        if group is not None:
+            return ep_map.get(group, {})
+        return ep_map
+
+    def get_entry_info(self, group, name):
+        """Return the EntryPoint object for `group`+`name`, or ``None``"""
+        return self.get_entry_map(group).get(name)
+
+    def insert_on(self, path, loc=None, replace=False):
+        """Ensure self.location is on path
+
+        If replace=False (default):
+            - If location is already in path anywhere, do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent.
+              - Else: add to the end of path.
+        If replace=True:
+            - If location is already on path anywhere (not eggs)
+              or higher priority than its parent (eggs)
+              do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent,
+                removing any lower-priority entries.
+              - Else: add it to the front of path.
+        """
+
+        loc = loc or self.location
+        if not loc:
+            return
+
+        nloc = _normalize_cached(loc)
+        bdir = os.path.dirname(nloc)
+        npath = [(p and _normalize_cached(p) or p) for p in path]
+
+        for p, item in enumerate(npath):
+            if item == nloc:
+                if replace:
+                    break
+                else:
+                    # don't modify path (even removing duplicates) if
+                    # found and not replace
+                    return
+            elif item == bdir and self.precedence == EGG_DIST:
+                # if it's an .egg, give it precedence over its directory
+                # UNLESS it's already been added to sys.path and replace=False
+                if (not replace) and nloc in npath[p:]:
+                    return
+                if path is sys.path:
+                    self.check_version_conflict()
+                path.insert(p, loc)
+                npath.insert(p, nloc)
+                break
+        else:
+            if path is sys.path:
+                self.check_version_conflict()
+            if replace:
+                path.insert(0, loc)
+            else:
+                path.append(loc)
+            return
+
+        # p is the spot where we found or inserted loc; now remove duplicates
+        while True:
+            try:
+                np = npath.index(nloc, p + 1)
+            except ValueError:
+                break
+            else:
+                del npath[np], path[np]
+                # ha!
+                p = np
+
+        return
+
+    def check_version_conflict(self):
+        if self.key == 'setuptools':
+            # ignore the inevitable setuptools self-conflicts  :(
+            return
+
+        nsp = dict.fromkeys(self._get_metadata('namespace_packages.txt'))
+        loc = normalize_path(self.location)
+        for modname in self._get_metadata('top_level.txt'):
+            if (modname not in sys.modules or modname in nsp
+                    or modname in _namespace_packages):
+                continue
+            if modname in ('pkg_resources', 'setuptools', 'site'):
+                continue
+            fn = getattr(sys.modules[modname], '__file__', None)
+            if fn and (normalize_path(fn).startswith(loc) or
+                       fn.startswith(self.location)):
+                continue
+            issue_warning(
+                "Module %s was already imported from %s, but %s is being added"
+                " to sys.path" % (modname, fn, self.location),
+            )
+
+    def has_version(self):
+        try:
+            self.version
+        except ValueError:
+            issue_warning("Unbuilt egg for " + repr(self))
+            return False
+        return True
+
+    def clone(self, **kw):
+        """Copy this distribution, substituting in any changed keyword args"""
+        names = 'project_name version py_version platform location precedence'
+        for attr in names.split():
+            kw.setdefault(attr, getattr(self, attr, None))
+        kw.setdefault('metadata', self._provider)
+        return self.__class__(**kw)
+
+    @property
+    def extras(self):
+        return [dep for dep in self._dep_map if dep]
+
+
+class EggInfoDistribution(Distribution):
+    def _reload_version(self):
+        """
+        Packages installed by distutils (e.g. numpy or scipy),
+        which uses an old safe_version, and so
+        their version numbers can get mangled when
+        converted to filenames (e.g., 1.11.0.dev0+2329eae to
+        1.11.0.dev0_2329eae). These distributions will not be
+        parsed properly
+        downstream by Distribution and safe_version, so
+        take an extra step and try to get the version number from
+        the metadata file itself instead of the filename.
+        """
+        md_version = self._get_version()
+        if md_version:
+            self._version = md_version
+        return self
+
+
+class DistInfoDistribution(Distribution):
+    """
+    Wrap an actual or potential sys.path entry
+    w/metadata, .dist-info style.
+    """
+    PKG_INFO = 'METADATA'
+    EQEQ = re.compile(r"([\(,])\s*(\d.*?)\s*([,\)])")
+
+    @property
+    def _parsed_pkg_info(self):
+        """Parse and cache metadata"""
+        try:
+            return self._pkg_info
+        except AttributeError:
+            metadata = self.get_metadata(self.PKG_INFO)
+            self._pkg_info = email.parser.Parser().parsestr(metadata)
+            return self._pkg_info
+
+    @property
+    def _dep_map(self):
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._compute_dependencies()
+            return self.__dep_map
+
+    def _compute_dependencies(self):
+        """Recompute this distribution's dependencies."""
+        dm = self.__dep_map = {None: []}
+
+        reqs = []
+        # Including any condition expressions
+        for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
+            reqs.extend(parse_requirements(req))
+
+        def reqs_for_extra(extra):
+            for req in reqs:
+                if not req.marker or req.marker.evaluate({'extra': extra}):
+                    yield req
+
+        common = frozenset(reqs_for_extra(None))
+        dm[None].extend(common)
+
+        for extra in self._parsed_pkg_info.get_all('Provides-Extra') or []:
+            s_extra = safe_extra(extra.strip())
+            dm[s_extra] = list(frozenset(reqs_for_extra(extra)) - common)
+
+        return dm
+
+
+_distributionImpl = {
+    '.egg': Distribution,
+    '.egg-info': EggInfoDistribution,
+    '.dist-info': DistInfoDistribution,
+}
+
+
+def issue_warning(*args, **kw):
+    level = 1
+    g = globals()
+    try:
+        # find the first stack frame that is *not* code in
+        # the pkg_resources module, to use for the warning
+        while sys._getframe(level).f_globals is g:
+            level += 1
+    except ValueError:
+        pass
+    warnings.warn(stacklevel=level + 1, *args, **kw)
+
+
+class RequirementParseError(ValueError):
+    def __str__(self):
+        return ' '.join(self.args)
+
+
+def parse_requirements(strs):
+    """Yield ``Requirement`` objects for each specification in `strs`
+
+    `strs` must be a string, or a (possibly-nested) iterable thereof.
+    """
+    # create a steppable iterator, so we can handle \-continuations
+    lines = iter(yield_lines(strs))
+
+    for line in lines:
+        # Drop comments -- a hash without a space may be in a URL.
+        if ' #' in line:
+            line = line[:line.find(' #')]
+        # If there is a line continuation, drop it, and append the next line.
+        if line.endswith('\\'):
+            line = line[:-2].strip()
+            try:
+                line += next(lines)
+            except StopIteration:
+                return
+        yield Requirement(line)
+
+
+class Requirement(packaging.requirements.Requirement):
+    def __init__(self, requirement_string):
+        """DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
+        try:
+            super(Requirement, self).__init__(requirement_string)
+        except packaging.requirements.InvalidRequirement as e:
+            raise RequirementParseError(str(e))
+        self.unsafe_name = self.name
+        project_name = safe_name(self.name)
+        self.project_name, self.key = project_name, project_name.lower()
+        self.specs = [
+            (spec.operator, spec.version) for spec in self.specifier]
+        self.extras = tuple(map(safe_extra, self.extras))
+        self.hashCmp = (
+            self.key,
+            self.url,
+            self.specifier,
+            frozenset(self.extras),
+            str(self.marker) if self.marker else None,
+        )
+        self.__hash = hash(self.hashCmp)
+
+    def __eq__(self, other):
+        return (
+            isinstance(other, Requirement) and
+            self.hashCmp == other.hashCmp
+        )
+
+    def __ne__(self, other):
+        return not self == other
+
+    def __contains__(self, item):
+        if isinstance(item, Distribution):
+            if item.key != self.key:
+                return False
+
+            item = item.version
+
+        # Allow prereleases always in order to match the previous behavior of
+        # this method. In the future this should be smarter and follow PEP 440
+        # more accurately.
+        return self.specifier.contains(item, prereleases=True)
+
+    def __hash__(self):
+        return self.__hash
+
+    def __repr__(self):
+        return "Requirement.parse(%r)" % str(self)
+
+    @staticmethod
+    def parse(s):
+        req, = parse_requirements(s)
+        return req
+
+
+def _always_object(classes):
+    """
+    Ensure object appears in the mro even
+    for old-style classes.
+    """
+    if object not in classes:
+        return classes + (object,)
+    return classes
+
+
+def _find_adapter(registry, ob):
+    """Return an adapter factory for `ob` from `registry`"""
+    types = _always_object(inspect.getmro(getattr(ob, '__class__', type(ob))))
+    for t in types:
+        if t in registry:
+            return registry[t]
+
+
+def ensure_directory(path):
+    """Ensure that the parent directory of `path` exists"""
+    dirname = os.path.dirname(path)
+    py31compat.makedirs(dirname, exist_ok=True)
+
+
+def _bypass_ensure_directory(path):
+    """Sandbox-bypassing version of ensure_directory()"""
+    if not WRITE_SUPPORT:
+        raise IOError('"os.mkdir" not supported on this platform.')
+    dirname, filename = split(path)
+    if dirname and filename and not isdir(dirname):
+        _bypass_ensure_directory(dirname)
+        try:
+            mkdir(dirname, 0o755)
+        except FileExistsError:
+            pass
+
+
+def split_sections(s):
+    """Split a string or iterable thereof into (section, content) pairs
+
+    Each ``section`` is a stripped version of the section header ("[section]")
+    and each ``content`` is a list of stripped lines excluding blank lines and
+    comment-only lines.  If there are any such lines before the first section
+    header, they're returned in a first ``section`` of ``None``.
+    """
+    section = None
+    content = []
+    for line in yield_lines(s):
+        if line.startswith("["):
+            if line.endswith("]"):
+                if section or content:
+                    yield section, content
+                section = line[1:-1].strip()
+                content = []
+            else:
+                raise ValueError("Invalid section heading", line)
+        else:
+            content.append(line)
+
+    # wrap up last segment
+    yield section, content
+
+
+def _mkstemp(*args, **kw):
+    old_open = os.open
+    try:
+        # temporarily bypass sandboxing
+        os.open = os_open
+        return tempfile.mkstemp(*args, **kw)
+    finally:
+        # and then put it back
+        os.open = old_open
+
+
+# Silence the PEP440Warning by default, so that end users don't get hit by it
+# randomly just because they use pkg_resources. We want to append the rule
+# because we want earlier uses of filterwarnings to take precedence over this
+# one.
+warnings.filterwarnings("ignore", category=PEP440Warning, append=True)
+
+
+# from jaraco.functools 1.3
+def _call_aside(f, *args, **kwargs):
+    f(*args, **kwargs)
+    return f
+
+
+@_call_aside
+def _initialize(g=globals()):
+    "Set up global resource manager (deliberately not state-saved)"
+    manager = ResourceManager()
+    g['_manager'] = manager
+    g.update(
+        (name, getattr(manager, name))
+        for name in dir(manager)
+        if not name.startswith('_')
+    )
+
+
+@_call_aside
+def _initialize_master_working_set():
+    """
+    Prepare the master working set and make the ``require()``
+    API available.
+
+    This function has explicit effects on the global state
+    of pkg_resources. It is intended to be invoked once at
+    the initialization of this module.
+
+    Invocation by other packages is unsupported and done
+    at their own risk.
+    """
+    working_set = WorkingSet._build_master()
+    _declare_state('object', working_set=working_set)
+
+    require = working_set.require
+    iter_entry_points = working_set.iter_entry_points
+    add_activation_listener = working_set.subscribe
+    run_script = working_set.run_script
+    # backward compatibility
+    run_main = run_script
+    # Activate all distributions already on sys.path with replace=False and
+    # ensure that all distributions added to the working set in the future
+    # (e.g. by calling ``require()``) will get activated as well,
+    # with higher priority (replace=True).
+    tuple(
+        dist.activate(replace=False)
+        for dist in working_set
+    )
+    add_activation_listener(
+        lambda dist: dist.activate(replace=True),
+        existing=False,
+    )
+    working_set.entries = []
+    # match order
+    list(map(working_set.add_entry, sys.path))
+    globals().update(locals())
+
+class PkgResourcesDeprecationWarning(Warning):
+    """
+    Base class for warning about deprecations in ``pkg_resources``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
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+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/appdirs.py
@@ -0,0 +1,607 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2005-2010 ActiveState Software Inc.
+# Copyright (c) 2013 Eddy Petrișor
+
+"""Utilities for determining application-specific dirs.
+
+See <http://github.com/ActiveState/appdirs> for details and usage.
+"""
+# Dev Notes:
+# - MSDN on where to store app data files:
+#   http://support.microsoft.com/default.aspx?scid=kb;en-us;310294#XSLTH3194121123120121120120
+# - Mac OS X: http://developer.apple.com/documentation/MacOSX/Conceptual/BPFileSystem/index.html
+# - XDG spec for Un*x: http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+
+__version_info__ = (1, 4, 3)
+__version__ = '.'.join(map(str, __version_info__))
+
+
+import sys
+import os
+
+PY3 = sys.version_info[0] == 3
+
+if PY3:
+    unicode = str
+
+if sys.platform.startswith('java'):
+    import platform
+    os_name = platform.java_ver()[3][0]
+    if os_name.startswith('Windows'): # "Windows XP", "Windows 7", etc.
+        system = 'win32'
+    elif os_name.startswith('Mac'): # "Mac OS X", etc.
+        system = 'darwin'
+    else: # "Linux", "SunOS", "FreeBSD", etc.
+        # Setting this to "linux2" is not ideal, but only Windows or Mac
+        # are actually checked for and the rest of the module expects
+        # *sys.platform* style strings.
+        system = 'linux2'
+else:
+    system = sys.platform
+
+
+
+def user_data_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user data directories are:
+        Mac OS X:               ~/Library/Application Support/<AppName>
+        Unix:                   ~/.local/share/<AppName>    # or in $XDG_DATA_HOME, if defined
+        Win XP (not roaming):   C:\Documents and Settings\<username>\Application Data\<AppAuthor>\<AppName>
+        Win XP (roaming):       C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>
+        Win 7  (not roaming):   C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>
+        Win 7  (roaming):       C:\Users\<username>\AppData\Roaming\<AppAuthor>\<AppName>
+
+    For Unix, we follow the XDG spec and support $XDG_DATA_HOME.
+    That means, by default "~/.local/share/<AppName>".
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        const = roaming and "CSIDL_APPDATA" or "CSIDL_LOCAL_APPDATA"
+        path = os.path.normpath(_get_win_folder(const))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+    elif system == 'darwin':
+        path = os.path.expanduser('~/Library/Application Support/')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        path = os.getenv('XDG_DATA_HOME', os.path.expanduser("~/.local/share"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def site_data_dir(appname=None, appauthor=None, version=None, multipath=False):
+    r"""Return full path to the user-shared data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "multipath" is an optional parameter only applicable to *nix
+            which indicates that the entire list of data dirs should be
+            returned. By default, the first item from XDG_DATA_DIRS is
+            returned, or '/usr/local/share/<AppName>',
+            if XDG_DATA_DIRS is not set
+
+    Typical site data directories are:
+        Mac OS X:   /Library/Application Support/<AppName>
+        Unix:       /usr/local/share/<AppName> or /usr/share/<AppName>
+        Win XP:     C:\Documents and Settings\All Users\Application Data\<AppAuthor>\<AppName>
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
+        Win 7:      C:\ProgramData\<AppAuthor>\<AppName>   # Hidden, but writeable on Win 7.
+
+    For Unix, this is using the $XDG_DATA_DIRS[0] default.
+
+    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        path = os.path.normpath(_get_win_folder("CSIDL_COMMON_APPDATA"))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+    elif system == 'darwin':
+        path = os.path.expanduser('/Library/Application Support')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        # XDG default for $XDG_DATA_DIRS
+        # only first, if multipath is False
+        path = os.getenv('XDG_DATA_DIRS',
+                         os.pathsep.join(['/usr/local/share', '/usr/share']))
+        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
+        if appname:
+            if version:
+                appname = os.path.join(appname, version)
+            pathlist = [os.sep.join([x, appname]) for x in pathlist]
+
+        if multipath:
+            path = os.pathsep.join(pathlist)
+        else:
+            path = pathlist[0]
+        return path
+
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_config_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific config dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user config directories are:
+        Mac OS X:               same as user_data_dir
+        Unix:                   ~/.config/<AppName>     # or in $XDG_CONFIG_HOME, if defined
+        Win *:                  same as user_data_dir
+
+    For Unix, we follow the XDG spec and support $XDG_CONFIG_HOME.
+    That means, by default "~/.config/<AppName>".
+    """
+    if system in ["win32", "darwin"]:
+        path = user_data_dir(appname, appauthor, None, roaming)
+    else:
+        path = os.getenv('XDG_CONFIG_HOME', os.path.expanduser("~/.config"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def site_config_dir(appname=None, appauthor=None, version=None, multipath=False):
+    r"""Return full path to the user-shared data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "multipath" is an optional parameter only applicable to *nix
+            which indicates that the entire list of config dirs should be
+            returned. By default, the first item from XDG_CONFIG_DIRS is
+            returned, or '/etc/xdg/<AppName>', if XDG_CONFIG_DIRS is not set
+
+    Typical site config directories are:
+        Mac OS X:   same as site_data_dir
+        Unix:       /etc/xdg/<AppName> or $XDG_CONFIG_DIRS[i]/<AppName> for each value in
+                    $XDG_CONFIG_DIRS
+        Win *:      same as site_data_dir
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
+
+    For Unix, this is using the $XDG_CONFIG_DIRS[0] default, if multipath=False
+
+    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
+    """
+    if system in ["win32", "darwin"]:
+        path = site_data_dir(appname, appauthor)
+        if appname and version:
+            path = os.path.join(path, version)
+    else:
+        # XDG default for $XDG_CONFIG_DIRS
+        # only first, if multipath is False
+        path = os.getenv('XDG_CONFIG_DIRS', '/etc/xdg')
+        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
+        if appname:
+            if version:
+                appname = os.path.join(appname, version)
+            pathlist = [os.sep.join([x, appname]) for x in pathlist]
+
+        if multipath:
+            path = os.pathsep.join(pathlist)
+        else:
+            path = pathlist[0]
+    return path
+
+
+def user_cache_dir(appname=None, appauthor=None, version=None, opinion=True):
+    r"""Return full path to the user-specific cache dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "opinion" (boolean) can be False to disable the appending of
+            "Cache" to the base app data dir for Windows. See
+            discussion below.
+
+    Typical user cache directories are:
+        Mac OS X:   ~/Library/Caches/<AppName>
+        Unix:       ~/.cache/<AppName> (XDG default)
+        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Cache
+        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Cache
+
+    On Windows the only suggestion in the MSDN docs is that local settings go in
+    the `CSIDL_LOCAL_APPDATA` directory. This is identical to the non-roaming
+    app data dir (the default returned by `user_data_dir` above). Apps typically
+    put cache data somewhere *under* the given dir here. Some examples:
+        ...\Mozilla\Firefox\Profiles\<ProfileName>\Cache
+        ...\Acme\SuperApp\Cache\1.0
+    OPINION: This function appends "Cache" to the `CSIDL_LOCAL_APPDATA` value.
+    This can be disabled with the `opinion=False` option.
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        path = os.path.normpath(_get_win_folder("CSIDL_LOCAL_APPDATA"))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+            if opinion:
+                path = os.path.join(path, "Cache")
+    elif system == 'darwin':
+        path = os.path.expanduser('~/Library/Caches')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        path = os.getenv('XDG_CACHE_HOME', os.path.expanduser('~/.cache'))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_state_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific state dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user state directories are:
+        Mac OS X:  same as user_data_dir
+        Unix:      ~/.local/state/<AppName>   # or in $XDG_STATE_HOME, if defined
+        Win *:     same as user_data_dir
+
+    For Unix, we follow this Debian proposal <https://wiki.debian.org/XDGBaseDirectorySpecification#state>
+    to extend the XDG spec and support $XDG_STATE_HOME.
+
+    That means, by default "~/.local/state/<AppName>".
+    """
+    if system in ["win32", "darwin"]:
+        path = user_data_dir(appname, appauthor, None, roaming)
+    else:
+        path = os.getenv('XDG_STATE_HOME', os.path.expanduser("~/.local/state"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_log_dir(appname=None, appauthor=None, version=None, opinion=True):
+    r"""Return full path to the user-specific log dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "opinion" (boolean) can be False to disable the appending of
+            "Logs" to the base app data dir for Windows, and "log" to the
+            base cache dir for Unix. See discussion below.
+
+    Typical user log directories are:
+        Mac OS X:   ~/Library/Logs/<AppName>
+        Unix:       ~/.cache/<AppName>/log  # or under $XDG_CACHE_HOME if defined
+        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Logs
+        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Logs
+
+    On Windows the only suggestion in the MSDN docs is that local settings
+    go in the `CSIDL_LOCAL_APPDATA` directory. (Note: I'm interested in
+    examples of what some windows apps use for a logs dir.)
+
+    OPINION: This function appends "Logs" to the `CSIDL_LOCAL_APPDATA`
+    value for Windows and appends "log" to the user cache dir for Unix.
+    This can be disabled with the `opinion=False` option.
+    """
+    if system == "darwin":
+        path = os.path.join(
+            os.path.expanduser('~/Library/Logs'),
+            appname)
+    elif system == "win32":
+        path = user_data_dir(appname, appauthor, version)
+        version = False
+        if opinion:
+            path = os.path.join(path, "Logs")
+    else:
+        path = user_cache_dir(appname, appauthor, version)
+        version = False
+        if opinion:
+            path = os.path.join(path, "log")
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+class AppDirs(object):
+    """Convenience wrapper for getting application dirs."""
+    def __init__(self, appname=None, appauthor=None, version=None,
+            roaming=False, multipath=False):
+        self.appname = appname
+        self.appauthor = appauthor
+        self.version = version
+        self.roaming = roaming
+        self.multipath = multipath
+
+    @property
+    def user_data_dir(self):
+        return user_data_dir(self.appname, self.appauthor,
+                             version=self.version, roaming=self.roaming)
+
+    @property
+    def site_data_dir(self):
+        return site_data_dir(self.appname, self.appauthor,
+                             version=self.version, multipath=self.multipath)
+
+    @property
+    def user_config_dir(self):
+        return user_config_dir(self.appname, self.appauthor,
+                               version=self.version, roaming=self.roaming)
+
+    @property
+    def site_config_dir(self):
+        return site_config_dir(self.appname, self.appauthor,
+                             version=self.version, multipath=self.multipath)
+
+    @property
+    def user_cache_dir(self):
+        return user_cache_dir(self.appname, self.appauthor,
+                              version=self.version)
+
+    @property
+    def user_state_dir(self):
+        return user_state_dir(self.appname, self.appauthor,
+                              version=self.version)
+
+    @property
+    def user_log_dir(self):
+        return user_log_dir(self.appname, self.appauthor,
+                            version=self.version)
+
+
+#---- internal support stuff
+
+def _get_win_folder_from_registry(csidl_name):
+    """This is a fallback technique at best. I'm not sure if using the
+    registry for this guarantees us the correct answer for all CSIDL_*
+    names.
+    """
+    if PY3:
+      import winreg as _winreg
+    else:
+      import _winreg
+
+    shell_folder_name = {
+        "CSIDL_APPDATA": "AppData",
+        "CSIDL_COMMON_APPDATA": "Common AppData",
+        "CSIDL_LOCAL_APPDATA": "Local AppData",
+    }[csidl_name]
+
+    key = _winreg.OpenKey(
+        _winreg.HKEY_CURRENT_USER,
+        r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
+    )
+    dir, type = _winreg.QueryValueEx(key, shell_folder_name)
+    return dir
+
+
+def _get_win_folder_with_pywin32(csidl_name):
+    from win32com.shell import shellcon, shell
+    dir = shell.SHGetFolderPath(0, getattr(shellcon, csidl_name), 0, 0)
+    # Try to make this a unicode path because SHGetFolderPath does
+    # not return unicode strings when there is unicode data in the
+    # path.
+    try:
+        dir = unicode(dir)
+
+        # Downgrade to short path name if have highbit chars. See
+        # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+        has_high_char = False
+        for c in dir:
+            if ord(c) > 255:
+                has_high_char = True
+                break
+        if has_high_char:
+            try:
+                import win32api
+                dir = win32api.GetShortPathName(dir)
+            except ImportError:
+                pass
+    except UnicodeError:
+        pass
+    return dir
+
+
+def _get_win_folder_with_ctypes(csidl_name):
+    import ctypes
+
+    csidl_const = {
+        "CSIDL_APPDATA": 26,
+        "CSIDL_COMMON_APPDATA": 35,
+        "CSIDL_LOCAL_APPDATA": 28,
+    }[csidl_name]
+
+    buf = ctypes.create_unicode_buffer(1024)
+    ctypes.windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in buf:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf2 = ctypes.create_unicode_buffer(1024)
+        if ctypes.windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
+            buf = buf2
+
+    return buf.value
+
+def _get_win_folder_with_jna(csidl_name):
+    import array
+    from com.sun import jna
+    from com.sun.jna.platform import win32
+
+    buf_size = win32.WinDef.MAX_PATH * 2
+    buf = array.zeros('c', buf_size)
+    shell = win32.Shell32.INSTANCE
+    shell.SHGetFolderPath(None, getattr(win32.ShlObj, csidl_name), None, win32.ShlObj.SHGFP_TYPE_CURRENT, buf)
+    dir = jna.Native.toString(buf.tostring()).rstrip("\0")
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in dir:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf = array.zeros('c', buf_size)
+        kernel = win32.Kernel32.INSTANCE
+        if kernel.GetShortPathName(dir, buf, buf_size):
+            dir = jna.Native.toString(buf.tostring()).rstrip("\0")
+
+    return dir
+
+if system == "win32":
+    try:
+        import win32com.shell
+        _get_win_folder = _get_win_folder_with_pywin32
+    except ImportError:
+        try:
+            from ctypes import windll
+            _get_win_folder = _get_win_folder_with_ctypes
+        except ImportError:
+            try:
+                import com.sun.jna
+                _get_win_folder = _get_win_folder_with_jna
+            except ImportError:
+                _get_win_folder = _get_win_folder_from_registry
+
+
+#---- self test code
+
+if __name__ == "__main__":
+    appname = "MyApp"
+    appauthor = "MyCompany"
+
+    props = ("user_data_dir",
+             "user_config_dir",
+             "user_cache_dir",
+             "user_state_dir",
+             "user_log_dir",
+             "site_data_dir",
+             "site_config_dir")
+
+    print("-- app dirs %s --" % __version__)
+
+    print("-- app dirs (with optional 'version')")
+    dirs = AppDirs(appname, appauthor, version="1.0")
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (without optional 'version')")
+    dirs = AppDirs(appname, appauthor)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (without optional 'appauthor')")
+    dirs = AppDirs(appname)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (with disabled 'appauthor')")
+    dirs = AppDirs(appname, appauthor=False)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/__about__.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/__about__.py
new file mode 100644
index 0000000..95d330e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/__about__.py
@@ -0,0 +1,21 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+__all__ = [
+    "__title__", "__summary__", "__uri__", "__version__", "__author__",
+    "__email__", "__license__", "__copyright__",
+]
+
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
+
+__version__ = "16.8"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD or Apache License, Version 2.0"
+__copyright__ = "Copyright 2014-2016 %s" % __author__
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/__init__.py
new file mode 100644
index 0000000..5ee6220
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/__init__.py
@@ -0,0 +1,14 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+from .__about__ import (
+    __author__, __copyright__, __email__, __license__, __summary__, __title__,
+    __uri__, __version__
+)
+
+__all__ = [
+    "__title__", "__summary__", "__uri__", "__version__", "__author__",
+    "__email__", "__license__", "__copyright__",
+]
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/__pycache__/__about__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/__pycache__/__about__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/__pycache__/version.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/__pycache__/version.cpython-38.pyc
new file mode 100644
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/_compat.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/_compat.py
new file mode 100644
index 0000000..210bb80
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/_compat.py
@@ -0,0 +1,30 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import sys
+
+
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+
+# flake8: noqa
+
+if PY3:
+    string_types = str,
+else:
+    string_types = basestring,
+
+
+def with_metaclass(meta, *bases):
+    """
+    Create a base class with a metaclass.
+    """
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/_structures.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/_structures.py
new file mode 100644
index 0000000..ccc2786
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/_structures.py
@@ -0,0 +1,68 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+
+class Infinity(object):
+
+    def __repr__(self):
+        return "Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return False
+
+    def __le__(self, other):
+        return False
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return True
+
+    def __ge__(self, other):
+        return True
+
+    def __neg__(self):
+        return NegativeInfinity
+
+Infinity = Infinity()
+
+
+class NegativeInfinity(object):
+
+    def __repr__(self):
+        return "-Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return True
+
+    def __le__(self, other):
+        return True
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return False
+
+    def __ge__(self, other):
+        return False
+
+    def __neg__(self):
+        return Infinity
+
+NegativeInfinity = NegativeInfinity()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/markers.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/markers.py
new file mode 100644
index 0000000..892e578
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/markers.py
@@ -0,0 +1,301 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import operator
+import os
+import platform
+import sys
+
+from pkg_resources.extern.pyparsing import ParseException, ParseResults, stringStart, stringEnd
+from pkg_resources.extern.pyparsing import ZeroOrMore, Group, Forward, QuotedString
+from pkg_resources.extern.pyparsing import Literal as L  # noqa
+
+from ._compat import string_types
+from .specifiers import Specifier, InvalidSpecifier
+
+
+__all__ = [
+    "InvalidMarker", "UndefinedComparison", "UndefinedEnvironmentName",
+    "Marker", "default_environment",
+]
+
+
+class InvalidMarker(ValueError):
+    """
+    An invalid marker was found, users should refer to PEP 508.
+    """
+
+
+class UndefinedComparison(ValueError):
+    """
+    An invalid operation was attempted on a value that doesn't support it.
+    """
+
+
+class UndefinedEnvironmentName(ValueError):
+    """
+    A name was attempted to be used that does not exist inside of the
+    environment.
+    """
+
+
+class Node(object):
+
+    def __init__(self, value):
+        self.value = value
+
+    def __str__(self):
+        return str(self.value)
+
+    def __repr__(self):
+        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
+
+    def serialize(self):
+        raise NotImplementedError
+
+
+class Variable(Node):
+
+    def serialize(self):
+        return str(self)
+
+
+class Value(Node):
+
+    def serialize(self):
+        return '"{0}"'.format(self)
+
+
+class Op(Node):
+
+    def serialize(self):
+        return str(self)
+
+
+VARIABLE = (
+    L("implementation_version") |
+    L("platform_python_implementation") |
+    L("implementation_name") |
+    L("python_full_version") |
+    L("platform_release") |
+    L("platform_version") |
+    L("platform_machine") |
+    L("platform_system") |
+    L("python_version") |
+    L("sys_platform") |
+    L("os_name") |
+    L("os.name") |  # PEP-345
+    L("sys.platform") |  # PEP-345
+    L("platform.version") |  # PEP-345
+    L("platform.machine") |  # PEP-345
+    L("platform.python_implementation") |  # PEP-345
+    L("python_implementation") |  # undocumented setuptools legacy
+    L("extra")
+)
+ALIASES = {
+    'os.name': 'os_name',
+    'sys.platform': 'sys_platform',
+    'platform.version': 'platform_version',
+    'platform.machine': 'platform_machine',
+    'platform.python_implementation': 'platform_python_implementation',
+    'python_implementation': 'platform_python_implementation'
+}
+VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
+
+VERSION_CMP = (
+    L("===") |
+    L("==") |
+    L(">=") |
+    L("<=") |
+    L("!=") |
+    L("~=") |
+    L(">") |
+    L("<")
+)
+
+MARKER_OP = VERSION_CMP | L("not in") | L("in")
+MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
+
+MARKER_VALUE = QuotedString("'") | QuotedString('"')
+MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
+
+BOOLOP = L("and") | L("or")
+
+MARKER_VAR = VARIABLE | MARKER_VALUE
+
+MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
+MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
+
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+
+MARKER_EXPR = Forward()
+MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
+MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
+
+MARKER = stringStart + MARKER_EXPR + stringEnd
+
+
+def _coerce_parse_result(results):
+    if isinstance(results, ParseResults):
+        return [_coerce_parse_result(i) for i in results]
+    else:
+        return results
+
+
+def _format_marker(marker, first=True):
+    assert isinstance(marker, (list, tuple, string_types))
+
+    # Sometimes we have a structure like [[...]] which is a single item list
+    # where the single item is itself it's own list. In that case we want skip
+    # the rest of this function so that we don't get extraneous () on the
+    # outside.
+    if (isinstance(marker, list) and len(marker) == 1 and
+            isinstance(marker[0], (list, tuple))):
+        return _format_marker(marker[0])
+
+    if isinstance(marker, list):
+        inner = (_format_marker(m, first=False) for m in marker)
+        if first:
+            return " ".join(inner)
+        else:
+            return "(" + " ".join(inner) + ")"
+    elif isinstance(marker, tuple):
+        return " ".join([m.serialize() for m in marker])
+    else:
+        return marker
+
+
+_operators = {
+    "in": lambda lhs, rhs: lhs in rhs,
+    "not in": lambda lhs, rhs: lhs not in rhs,
+    "<": operator.lt,
+    "<=": operator.le,
+    "==": operator.eq,
+    "!=": operator.ne,
+    ">=": operator.ge,
+    ">": operator.gt,
+}
+
+
+def _eval_op(lhs, op, rhs):
+    try:
+        spec = Specifier("".join([op.serialize(), rhs]))
+    except InvalidSpecifier:
+        pass
+    else:
+        return spec.contains(lhs)
+
+    oper = _operators.get(op.serialize())
+    if oper is None:
+        raise UndefinedComparison(
+            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
+        )
+
+    return oper(lhs, rhs)
+
+
+_undefined = object()
+
+
+def _get_env(environment, name):
+    value = environment.get(name, _undefined)
+
+    if value is _undefined:
+        raise UndefinedEnvironmentName(
+            "{0!r} does not exist in evaluation environment.".format(name)
+        )
+
+    return value
+
+
+def _evaluate_markers(markers, environment):
+    groups = [[]]
+
+    for marker in markers:
+        assert isinstance(marker, (list, tuple, string_types))
+
+        if isinstance(marker, list):
+            groups[-1].append(_evaluate_markers(marker, environment))
+        elif isinstance(marker, tuple):
+            lhs, op, rhs = marker
+
+            if isinstance(lhs, Variable):
+                lhs_value = _get_env(environment, lhs.value)
+                rhs_value = rhs.value
+            else:
+                lhs_value = lhs.value
+                rhs_value = _get_env(environment, rhs.value)
+
+            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
+        else:
+            assert marker in ["and", "or"]
+            if marker == "or":
+                groups.append([])
+
+    return any(all(item) for item in groups)
+
+
+def format_full_version(info):
+    version = '{0.major}.{0.minor}.{0.micro}'.format(info)
+    kind = info.releaselevel
+    if kind != 'final':
+        version += kind[0] + str(info.serial)
+    return version
+
+
+def default_environment():
+    if hasattr(sys, 'implementation'):
+        iver = format_full_version(sys.implementation.version)
+        implementation_name = sys.implementation.name
+    else:
+        iver = '0'
+        implementation_name = ''
+
+    return {
+        "implementation_name": implementation_name,
+        "implementation_version": iver,
+        "os_name": os.name,
+        "platform_machine": platform.machine(),
+        "platform_release": platform.release(),
+        "platform_system": platform.system(),
+        "platform_version": platform.version(),
+        "python_full_version": platform.python_version(),
+        "platform_python_implementation": platform.python_implementation(),
+        "python_version": platform.python_version()[:3],
+        "sys_platform": sys.platform,
+    }
+
+
+class Marker(object):
+
+    def __init__(self, marker):
+        try:
+            self._markers = _coerce_parse_result(MARKER.parseString(marker))
+        except ParseException as e:
+            err_str = "Invalid marker: {0!r}, parse error at {1!r}".format(
+                marker, marker[e.loc:e.loc + 8])
+            raise InvalidMarker(err_str)
+
+    def __str__(self):
+        return _format_marker(self._markers)
+
+    def __repr__(self):
+        return "<Marker({0!r})>".format(str(self))
+
+    def evaluate(self, environment=None):
+        """Evaluate a marker.
+
+        Return the boolean from evaluating the given marker against the
+        environment. environment is an optional argument to override all or
+        part of the determined environment.
+
+        The environment is determined from the current Python process.
+        """
+        current_environment = default_environment()
+        if environment is not None:
+            current_environment.update(environment)
+
+        return _evaluate_markers(self._markers, current_environment)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/requirements.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/requirements.py
new file mode 100644
index 0000000..0c8c4a3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/requirements.py
@@ -0,0 +1,127 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import string
+import re
+
+from pkg_resources.extern.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
+from pkg_resources.extern.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
+from pkg_resources.extern.pyparsing import Literal as L  # noqa
+from pkg_resources.extern.six.moves.urllib import parse as urlparse
+
+from .markers import MARKER_EXPR, Marker
+from .specifiers import LegacySpecifier, Specifier, SpecifierSet
+
+
+class InvalidRequirement(ValueError):
+    """
+    An invalid requirement was found, users should refer to PEP 508.
+    """
+
+
+ALPHANUM = Word(string.ascii_letters + string.digits)
+
+LBRACKET = L("[").suppress()
+RBRACKET = L("]").suppress()
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+COMMA = L(",").suppress()
+SEMICOLON = L(";").suppress()
+AT = L("@").suppress()
+
+PUNCTUATION = Word("-_.")
+IDENTIFIER_END = ALPHANUM | (ZeroOrMore(PUNCTUATION) + ALPHANUM)
+IDENTIFIER = Combine(ALPHANUM + ZeroOrMore(IDENTIFIER_END))
+
+NAME = IDENTIFIER("name")
+EXTRA = IDENTIFIER
+
+URI = Regex(r'[^ ]+')("url")
+URL = (AT + URI)
+
+EXTRAS_LIST = EXTRA + ZeroOrMore(COMMA + EXTRA)
+EXTRAS = (LBRACKET + Optional(EXTRAS_LIST) + RBRACKET)("extras")
+
+VERSION_PEP440 = Regex(Specifier._regex_str, re.VERBOSE | re.IGNORECASE)
+VERSION_LEGACY = Regex(LegacySpecifier._regex_str, re.VERBOSE | re.IGNORECASE)
+
+VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
+VERSION_MANY = Combine(VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE),
+                       joinString=",", adjacent=False)("_raw_spec")
+_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
+_VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or '')
+
+VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
+VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
+
+MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
+MARKER_EXPR.setParseAction(
+    lambda s, l, t: Marker(s[t._original_start:t._original_end])
+)
+MARKER_SEPERATOR = SEMICOLON
+MARKER = MARKER_SEPERATOR + MARKER_EXPR
+
+VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
+URL_AND_MARKER = URL + Optional(MARKER)
+
+NAMED_REQUIREMENT = \
+    NAME + Optional(EXTRAS) + (URL_AND_MARKER | VERSION_AND_MARKER)
+
+REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
+
+
+class Requirement(object):
+    """Parse a requirement.
+
+    Parse a given requirement string into its parts, such as name, specifier,
+    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
+    string.
+    """
+
+    # TODO: Can we test whether something is contained within a requirement?
+    #       If so how do we do that? Do we need to test against the _name_ of
+    #       the thing as well as the version? What about the markers?
+    # TODO: Can we normalize the name and extra name?
+
+    def __init__(self, requirement_string):
+        try:
+            req = REQUIREMENT.parseString(requirement_string)
+        except ParseException as e:
+            raise InvalidRequirement(
+                "Invalid requirement, parse error at \"{0!r}\"".format(
+                    requirement_string[e.loc:e.loc + 8]))
+
+        self.name = req.name
+        if req.url:
+            parsed_url = urlparse.urlparse(req.url)
+            if not (parsed_url.scheme and parsed_url.netloc) or (
+                    not parsed_url.scheme and not parsed_url.netloc):
+                raise InvalidRequirement("Invalid URL given")
+            self.url = req.url
+        else:
+            self.url = None
+        self.extras = set(req.extras.asList() if req.extras else [])
+        self.specifier = SpecifierSet(req.specifier)
+        self.marker = req.marker if req.marker else None
+
+    def __str__(self):
+        parts = [self.name]
+
+        if self.extras:
+            parts.append("[{0}]".format(",".join(sorted(self.extras))))
+
+        if self.specifier:
+            parts.append(str(self.specifier))
+
+        if self.url:
+            parts.append("@ {0}".format(self.url))
+
+        if self.marker:
+            parts.append("; {0}".format(self.marker))
+
+        return "".join(parts)
+
+    def __repr__(self):
+        return "<Requirement({0!r})>".format(str(self))
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/specifiers.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/specifiers.py
new file mode 100644
index 0000000..7f5a76c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/specifiers.py
@@ -0,0 +1,774 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import abc
+import functools
+import itertools
+import re
+
+from ._compat import string_types, with_metaclass
+from .version import Version, LegacyVersion, parse
+
+
+class InvalidSpecifier(ValueError):
+    """
+    An invalid specifier was found, users should refer to PEP 440.
+    """
+
+
+class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):
+
+    @abc.abstractmethod
+    def __str__(self):
+        """
+        Returns the str representation of this Specifier like object. This
+        should be representative of the Specifier itself.
+        """
+
+    @abc.abstractmethod
+    def __hash__(self):
+        """
+        Returns a hash value for this Specifier like object.
+        """
+
+    @abc.abstractmethod
+    def __eq__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are equal.
+        """
+
+    @abc.abstractmethod
+    def __ne__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are not equal.
+        """
+
+    @abc.abstractproperty
+    def prereleases(self):
+        """
+        Returns whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @prereleases.setter
+    def prereleases(self, value):
+        """
+        Sets whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @abc.abstractmethod
+    def contains(self, item, prereleases=None):
+        """
+        Determines if the given item is contained within this specifier.
+        """
+
+    @abc.abstractmethod
+    def filter(self, iterable, prereleases=None):
+        """
+        Takes an iterable of items and filters them so that only items which
+        are contained within this specifier are allowed in it.
+        """
+
+
+class _IndividualSpecifier(BaseSpecifier):
+
+    _operators = {}
+
+    def __init__(self, spec="", prereleases=None):
+        match = self._regex.search(spec)
+        if not match:
+            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+
+        self._spec = (
+            match.group("operator").strip(),
+            match.group("version").strip(),
+        )
+
+        # Store whether or not this Specifier should accept prereleases
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<{0}({1!r}{2})>".format(
+            self.__class__.__name__,
+            str(self),
+            pre,
+        )
+
+    def __str__(self):
+        return "{0}{1}".format(*self._spec)
+
+    def __hash__(self):
+        return hash(self._spec)
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec == other._spec
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec != other._spec
+
+    def _get_operator(self, op):
+        return getattr(self, "_compare_{0}".format(self._operators[op]))
+
+    def _coerce_version(self, version):
+        if not isinstance(version, (LegacyVersion, Version)):
+            version = parse(version)
+        return version
+
+    @property
+    def operator(self):
+        return self._spec[0]
+
+    @property
+    def version(self):
+        return self._spec[1]
+
+    @property
+    def prereleases(self):
+        return self._prereleases
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Determine if prereleases are to be allowed or not.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # Normalize item to a Version or LegacyVersion, this allows us to have
+        # a shortcut for ``"2.0" in Specifier(">=2")
+        item = self._coerce_version(item)
+
+        # Determine if we should be supporting prereleases in this specifier
+        # or not, if we do not support prereleases than we can short circuit
+        # logic if this version is a prereleases.
+        if item.is_prerelease and not prereleases:
+            return False
+
+        # Actually do the comparison to determine if this item is contained
+        # within this Specifier or not.
+        return self._get_operator(self.operator)(item, self.version)
+
+    def filter(self, iterable, prereleases=None):
+        yielded = False
+        found_prereleases = []
+
+        kw = {"prereleases": prereleases if prereleases is not None else True}
+
+        # Attempt to iterate over all the values in the iterable and if any of
+        # them match, yield them.
+        for version in iterable:
+            parsed_version = self._coerce_version(version)
+
+            if self.contains(parsed_version, **kw):
+                # If our version is a prerelease, and we were not set to allow
+                # prereleases, then we'll store it for later incase nothing
+                # else matches this specifier.
+                if (parsed_version.is_prerelease and not
+                        (prereleases or self.prereleases)):
+                    found_prereleases.append(version)
+                # Either this is not a prerelease, or we should have been
+                # accepting prereleases from the begining.
+                else:
+                    yielded = True
+                    yield version
+
+        # Now that we've iterated over everything, determine if we've yielded
+        # any values, and if we have not and we have any prereleases stored up
+        # then we will go ahead and yield the prereleases.
+        if not yielded and found_prereleases:
+            for version in found_prereleases:
+                yield version
+
+
+class LegacySpecifier(_IndividualSpecifier):
+
+    _regex_str = (
+        r"""
+        (?P<operator>(==|!=|<=|>=|<|>))
+        \s*
+        (?P<version>
+            [^,;\s)]* # Since this is a "legacy" specifier, and the version
+                      # string can be just about anything, we match everything
+                      # except for whitespace, a semi-colon for marker support,
+                      # a closing paren since versions can be enclosed in
+                      # them, and a comma since it's a version separator.
+        )
+        """
+    )
+
+    _regex = re.compile(
+        r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+    }
+
+    def _coerce_version(self, version):
+        if not isinstance(version, LegacyVersion):
+            version = LegacyVersion(str(version))
+        return version
+
+    def _compare_equal(self, prospective, spec):
+        return prospective == self._coerce_version(spec)
+
+    def _compare_not_equal(self, prospective, spec):
+        return prospective != self._coerce_version(spec)
+
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= self._coerce_version(spec)
+
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= self._coerce_version(spec)
+
+    def _compare_less_than(self, prospective, spec):
+        return prospective < self._coerce_version(spec)
+
+    def _compare_greater_than(self, prospective, spec):
+        return prospective > self._coerce_version(spec)
+
+
+def _require_version_compare(fn):
+    @functools.wraps(fn)
+    def wrapped(self, prospective, spec):
+        if not isinstance(prospective, Version):
+            return False
+        return fn(self, prospective, spec)
+    return wrapped
+
+
+class Specifier(_IndividualSpecifier):
+
+    _regex_str = (
+        r"""
+        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
+        (?P<version>
+            (?:
+                # The identity operators allow for an escape hatch that will
+                # do an exact string match of the version you wish to install.
+                # This will not be parsed by PEP 440 and we cannot determine
+                # any semantic meaning from it. This operator is discouraged
+                # but included entirely as an escape hatch.
+                (?<====)  # Only match for the identity operator
+                \s*
+                [^\s]*    # We just match everything, except for whitespace
+                          # since we are only testing for strict identity.
+            )
+            |
+            (?:
+                # The (non)equality operators allow for wild card and local
+                # versions to be specified so we have to define these two
+                # operators separately to enable that.
+                (?<===|!=)            # Only match for equals and not equals
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+
+                # You cannot use a wild card and a dev or local version
+                # together so group them with a | and make them optional.
+                (?:
+                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+                    |
+                    \.\*  # Wild card syntax of .*
+                )?
+            )
+            |
+            (?:
+                # The compatible operator requires at least two digits in the
+                # release segment.
+                (?<=~=)               # Only match for the compatible operator
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+            |
+            (?:
+                # All other operators only allow a sub set of what the
+                # (non)equality operators do. Specifically they do not allow
+                # local versions to be specified nor do they allow the prefix
+                # matching wild cards.
+                (?<!==|!=|~=)         # We have special cases for these
+                                      # operators so we want to make sure they
+                                      # don't match here.
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+        )
+        """
+    )
+
+    _regex = re.compile(
+        r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "~=": "compatible",
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+        "===": "arbitrary",
+    }
+
+    @_require_version_compare
+    def _compare_compatible(self, prospective, spec):
+        # Compatible releases have an equivalent combination of >= and ==. That
+        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
+        # implement this in terms of the other specifiers instead of
+        # implementing it ourselves. The only thing we need to do is construct
+        # the other specifiers.
+
+        # We want everything but the last item in the version, but we want to
+        # ignore post and dev releases and we want to treat the pre-release as
+        # it's own separate segment.
+        prefix = ".".join(
+            list(
+                itertools.takewhile(
+                    lambda x: (not x.startswith("post") and not
+                               x.startswith("dev")),
+                    _version_split(spec),
+                )
+            )[:-1]
+        )
+
+        # Add the prefix notation to the end of our string
+        prefix += ".*"
+
+        return (self._get_operator(">=")(prospective, spec) and
+                self._get_operator("==")(prospective, prefix))
+
+    @_require_version_compare
+    def _compare_equal(self, prospective, spec):
+        # We need special logic to handle prefix matching
+        if spec.endswith(".*"):
+            # In the case of prefix matching we want to ignore local segment.
+            prospective = Version(prospective.public)
+            # Split the spec out by dots, and pretend that there is an implicit
+            # dot in between a release segment and a pre-release segment.
+            spec = _version_split(spec[:-2])  # Remove the trailing .*
+
+            # Split the prospective version out by dots, and pretend that there
+            # is an implicit dot in between a release segment and a pre-release
+            # segment.
+            prospective = _version_split(str(prospective))
+
+            # Shorten the prospective version to be the same length as the spec
+            # so that we can determine if the specifier is a prefix of the
+            # prospective version or not.
+            prospective = prospective[:len(spec)]
+
+            # Pad out our two sides with zeros so that they both equal the same
+            # length.
+            spec, prospective = _pad_version(spec, prospective)
+        else:
+            # Convert our spec string into a Version
+            spec = Version(spec)
+
+            # If the specifier does not have a local segment, then we want to
+            # act as if the prospective version also does not have a local
+            # segment.
+            if not spec.local:
+                prospective = Version(prospective.public)
+
+        return prospective == spec
+
+    @_require_version_compare
+    def _compare_not_equal(self, prospective, spec):
+        return not self._compare_equal(prospective, spec)
+
+    @_require_version_compare
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= Version(spec)
+
+    @_require_version_compare
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= Version(spec)
+
+    @_require_version_compare
+    def _compare_less_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is less than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective < spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a pre-release version, that we do not accept pre-release
+        # versions for the version mentioned in the specifier (e.g. <3.1 should
+        # not match 3.1.dev0, but should match 3.0.dev0).
+        if not spec.is_prerelease and prospective.is_prerelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # less than the spec version *and* it's not a pre-release of the same
+        # version in the spec.
+        return True
+
+    @_require_version_compare
+    def _compare_greater_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is greater than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective > spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a post-release version, that we do not accept
+        # post-release versions for the version mentioned in the specifier
+        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
+        if not spec.is_postrelease and prospective.is_postrelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # Ensure that we do not allow a local version of the version mentioned
+        # in the specifier, which is techincally greater than, to match.
+        if prospective.local is not None:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # greater than the spec version *and* it's not a pre-release of the
+        # same version in the spec.
+        return True
+
+    def _compare_arbitrary(self, prospective, spec):
+        return str(prospective).lower() == str(spec).lower()
+
+    @property
+    def prereleases(self):
+        # If there is an explicit prereleases set for this, then we'll just
+        # blindly use that.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # Look at all of our specifiers and determine if they are inclusive
+        # operators, and if they are if they are including an explicit
+        # prerelease.
+        operator, version = self._spec
+        if operator in ["==", ">=", "<=", "~=", "==="]:
+            # The == specifier can include a trailing .*, if it does we
+            # want to remove before parsing.
+            if operator == "==" and version.endswith(".*"):
+                version = version[:-2]
+
+            # Parse the version, and if it is a pre-release than this
+            # specifier allows pre-releases.
+            if parse(version).is_prerelease:
+                return True
+
+        return False
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+
+_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
+
+
+def _version_split(version):
+    result = []
+    for item in version.split("."):
+        match = _prefix_regex.search(item)
+        if match:
+            result.extend(match.groups())
+        else:
+            result.append(item)
+    return result
+
+
+def _pad_version(left, right):
+    left_split, right_split = [], []
+
+    # Get the release segment of our versions
+    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
+    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
+
+    # Get the rest of our versions
+    left_split.append(left[len(left_split[0]):])
+    right_split.append(right[len(right_split[0]):])
+
+    # Insert our padding
+    left_split.insert(
+        1,
+        ["0"] * max(0, len(right_split[0]) - len(left_split[0])),
+    )
+    right_split.insert(
+        1,
+        ["0"] * max(0, len(left_split[0]) - len(right_split[0])),
+    )
+
+    return (
+        list(itertools.chain(*left_split)),
+        list(itertools.chain(*right_split)),
+    )
+
+
+class SpecifierSet(BaseSpecifier):
+
+    def __init__(self, specifiers="", prereleases=None):
+        # Split on , to break each indidivual specifier into it's own item, and
+        # strip each item to remove leading/trailing whitespace.
+        specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
+
+        # Parsed each individual specifier, attempting first to make it a
+        # Specifier and falling back to a LegacySpecifier.
+        parsed = set()
+        for specifier in specifiers:
+            try:
+                parsed.add(Specifier(specifier))
+            except InvalidSpecifier:
+                parsed.add(LegacySpecifier(specifier))
+
+        # Turn our parsed specifiers into a frozen set and save them for later.
+        self._specs = frozenset(parsed)
+
+        # Store our prereleases value so we can use it later to determine if
+        # we accept prereleases or not.
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+
+    def __str__(self):
+        return ",".join(sorted(str(s) for s in self._specs))
+
+    def __hash__(self):
+        return hash(self._specs)
+
+    def __and__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        specifier = SpecifierSet()
+        specifier._specs = frozenset(self._specs | other._specs)
+
+        if self._prereleases is None and other._prereleases is not None:
+            specifier._prereleases = other._prereleases
+        elif self._prereleases is not None and other._prereleases is None:
+            specifier._prereleases = self._prereleases
+        elif self._prereleases == other._prereleases:
+            specifier._prereleases = self._prereleases
+        else:
+            raise ValueError(
+                "Cannot combine SpecifierSets with True and False prerelease "
+                "overrides."
+            )
+
+        return specifier
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs == other._specs
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs != other._specs
+
+    def __len__(self):
+        return len(self._specs)
+
+    def __iter__(self):
+        return iter(self._specs)
+
+    @property
+    def prereleases(self):
+        # If we have been given an explicit prerelease modifier, then we'll
+        # pass that through here.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # If we don't have any specifiers, and we don't have a forced value,
+        # then we'll just return None since we don't know if this should have
+        # pre-releases or not.
+        if not self._specs:
+            return None
+
+        # Otherwise we'll see if any of the given specifiers accept
+        # prereleases, if any of them do we'll return True, otherwise False.
+        return any(s.prereleases for s in self._specs)
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Ensure that our item is a Version or LegacyVersion instance.
+        if not isinstance(item, (LegacyVersion, Version)):
+            item = parse(item)
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # We can determine if we're going to allow pre-releases by looking to
+        # see if any of the underlying items supports them. If none of them do
+        # and this item is a pre-release then we do not allow it and we can
+        # short circuit that here.
+        # Note: This means that 1.0.dev1 would not be contained in something
+        #       like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
+        if not prereleases and item.is_prerelease:
+            return False
+
+        # We simply dispatch to the underlying specs here to make sure that the
+        # given version is contained within all of them.
+        # Note: This use of all() here means that an empty set of specifiers
+        #       will always return True, this is an explicit design decision.
+        return all(
+            s.contains(item, prereleases=prereleases)
+            for s in self._specs
+        )
+
+    def filter(self, iterable, prereleases=None):
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # If we have any specifiers, then we want to wrap our iterable in the
+        # filter method for each one, this will act as a logical AND amongst
+        # each specifier.
+        if self._specs:
+            for spec in self._specs:
+                iterable = spec.filter(iterable, prereleases=bool(prereleases))
+            return iterable
+        # If we do not have any specifiers, then we need to have a rough filter
+        # which will filter out any pre-releases, unless there are no final
+        # releases, and which will filter out LegacyVersion in general.
+        else:
+            filtered = []
+            found_prereleases = []
+
+            for item in iterable:
+                # Ensure that we some kind of Version class for this item.
+                if not isinstance(item, (LegacyVersion, Version)):
+                    parsed_version = parse(item)
+                else:
+                    parsed_version = item
+
+                # Filter out any item which is parsed as a LegacyVersion
+                if isinstance(parsed_version, LegacyVersion):
+                    continue
+
+                # Store any item which is a pre-release for later unless we've
+                # already found a final version or we are accepting prereleases
+                if parsed_version.is_prerelease and not prereleases:
+                    if not filtered:
+                        found_prereleases.append(item)
+                else:
+                    filtered.append(item)
+
+            # If we've found no items except for pre-releases, then we'll go
+            # ahead and use the pre-releases
+            if not filtered and found_prereleases and prereleases is None:
+                return found_prereleases
+
+            return filtered
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/utils.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/utils.py
new file mode 100644
index 0000000..942387c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/utils.py
@@ -0,0 +1,14 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import re
+
+
+_canonicalize_regex = re.compile(r"[-_.]+")
+
+
+def canonicalize_name(name):
+    # This is taken from PEP 503.
+    return _canonicalize_regex.sub("-", name).lower()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/version.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/version.py
new file mode 100644
index 0000000..83b5ee8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/packaging/version.py
@@ -0,0 +1,393 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import collections
+import itertools
+import re
+
+from ._structures import Infinity
+
+
+__all__ = [
+    "parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"
+]
+
+
+_Version = collections.namedtuple(
+    "_Version",
+    ["epoch", "release", "dev", "pre", "post", "local"],
+)
+
+
+def parse(version):
+    """
+    Parse the given version string and return either a :class:`Version` object
+    or a :class:`LegacyVersion` object depending on if the given version is
+    a valid PEP 440 version or a legacy version.
+    """
+    try:
+        return Version(version)
+    except InvalidVersion:
+        return LegacyVersion(version)
+
+
+class InvalidVersion(ValueError):
+    """
+    An invalid version was found, users should refer to PEP 440.
+    """
+
+
+class _BaseVersion(object):
+
+    def __hash__(self):
+        return hash(self._key)
+
+    def __lt__(self, other):
+        return self._compare(other, lambda s, o: s < o)
+
+    def __le__(self, other):
+        return self._compare(other, lambda s, o: s <= o)
+
+    def __eq__(self, other):
+        return self._compare(other, lambda s, o: s == o)
+
+    def __ge__(self, other):
+        return self._compare(other, lambda s, o: s >= o)
+
+    def __gt__(self, other):
+        return self._compare(other, lambda s, o: s > o)
+
+    def __ne__(self, other):
+        return self._compare(other, lambda s, o: s != o)
+
+    def _compare(self, other, method):
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return method(self._key, other._key)
+
+
+class LegacyVersion(_BaseVersion):
+
+    def __init__(self, version):
+        self._version = str(version)
+        self._key = _legacy_cmpkey(self._version)
+
+    def __str__(self):
+        return self._version
+
+    def __repr__(self):
+        return "<LegacyVersion({0})>".format(repr(str(self)))
+
+    @property
+    def public(self):
+        return self._version
+
+    @property
+    def base_version(self):
+        return self._version
+
+    @property
+    def local(self):
+        return None
+
+    @property
+    def is_prerelease(self):
+        return False
+
+    @property
+    def is_postrelease(self):
+        return False
+
+
+_legacy_version_component_re = re.compile(
+    r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE,
+)
+
+_legacy_version_replacement_map = {
+    "pre": "c", "preview": "c", "-": "final-", "rc": "c", "dev": "@",
+}
+
+
+def _parse_version_parts(s):
+    for part in _legacy_version_component_re.split(s):
+        part = _legacy_version_replacement_map.get(part, part)
+
+        if not part or part == ".":
+            continue
+
+        if part[:1] in "0123456789":
+            # pad for numeric comparison
+            yield part.zfill(8)
+        else:
+            yield "*" + part
+
+    # ensure that alpha/beta/candidate are before final
+    yield "*final"
+
+
+def _legacy_cmpkey(version):
+    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
+    # greater than or equal to 0. This will effectively put the LegacyVersion,
+    # which uses the defacto standard originally implemented by setuptools,
+    # as before all PEP 440 versions.
+    epoch = -1
+
+    # This scheme is taken from pkg_resources.parse_version setuptools prior to
+    # it's adoption of the packaging library.
+    parts = []
+    for part in _parse_version_parts(version.lower()):
+        if part.startswith("*"):
+            # remove "-" before a prerelease tag
+            if part < "*final":
+                while parts and parts[-1] == "*final-":
+                    parts.pop()
+
+            # remove trailing zeros from each series of numeric parts
+            while parts and parts[-1] == "00000000":
+                parts.pop()
+
+        parts.append(part)
+    parts = tuple(parts)
+
+    return epoch, parts
+
+# Deliberately not anchored to the start and end of the string, to make it
+# easier for 3rd party code to reuse
+VERSION_PATTERN = r"""
+    v?
+    (?:
+        (?:(?P<epoch>[0-9]+)!)?                           # epoch
+        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
+        (?P<pre>                                          # pre-release
+            [-_\.]?
+            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
+            [-_\.]?
+            (?P<pre_n>[0-9]+)?
+        )?
+        (?P<post>                                         # post release
+            (?:-(?P<post_n1>[0-9]+))
+            |
+            (?:
+                [-_\.]?
+                (?P<post_l>post|rev|r)
+                [-_\.]?
+                (?P<post_n2>[0-9]+)?
+            )
+        )?
+        (?P<dev>                                          # dev release
+            [-_\.]?
+            (?P<dev_l>dev)
+            [-_\.]?
+            (?P<dev_n>[0-9]+)?
+        )?
+    )
+    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
+"""
+
+
+class Version(_BaseVersion):
+
+    _regex = re.compile(
+        r"^\s*" + VERSION_PATTERN + r"\s*$",
+        re.VERBOSE | re.IGNORECASE,
+    )
+
+    def __init__(self, version):
+        # Validate the version and parse it into pieces
+        match = self._regex.search(version)
+        if not match:
+            raise InvalidVersion("Invalid version: '{0}'".format(version))
+
+        # Store the parsed out pieces of the version
+        self._version = _Version(
+            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
+            release=tuple(int(i) for i in match.group("release").split(".")),
+            pre=_parse_letter_version(
+                match.group("pre_l"),
+                match.group("pre_n"),
+            ),
+            post=_parse_letter_version(
+                match.group("post_l"),
+                match.group("post_n1") or match.group("post_n2"),
+            ),
+            dev=_parse_letter_version(
+                match.group("dev_l"),
+                match.group("dev_n"),
+            ),
+            local=_parse_local_version(match.group("local")),
+        )
+
+        # Generate a key which will be used for sorting
+        self._key = _cmpkey(
+            self._version.epoch,
+            self._version.release,
+            self._version.pre,
+            self._version.post,
+            self._version.dev,
+            self._version.local,
+        )
+
+    def __repr__(self):
+        return "<Version({0})>".format(repr(str(self)))
+
+    def __str__(self):
+        parts = []
+
+        # Epoch
+        if self._version.epoch != 0:
+            parts.append("{0}!".format(self._version.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self._version.release))
+
+        # Pre-release
+        if self._version.pre is not None:
+            parts.append("".join(str(x) for x in self._version.pre))
+
+        # Post-release
+        if self._version.post is not None:
+            parts.append(".post{0}".format(self._version.post[1]))
+
+        # Development release
+        if self._version.dev is not None:
+            parts.append(".dev{0}".format(self._version.dev[1]))
+
+        # Local version segment
+        if self._version.local is not None:
+            parts.append(
+                "+{0}".format(".".join(str(x) for x in self._version.local))
+            )
+
+        return "".join(parts)
+
+    @property
+    def public(self):
+        return str(self).split("+", 1)[0]
+
+    @property
+    def base_version(self):
+        parts = []
+
+        # Epoch
+        if self._version.epoch != 0:
+            parts.append("{0}!".format(self._version.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self._version.release))
+
+        return "".join(parts)
+
+    @property
+    def local(self):
+        version_string = str(self)
+        if "+" in version_string:
+            return version_string.split("+", 1)[1]
+
+    @property
+    def is_prerelease(self):
+        return bool(self._version.dev or self._version.pre)
+
+    @property
+    def is_postrelease(self):
+        return bool(self._version.post)
+
+
+def _parse_letter_version(letter, number):
+    if letter:
+        # We consider there to be an implicit 0 in a pre-release if there is
+        # not a numeral associated with it.
+        if number is None:
+            number = 0
+
+        # We normalize any letters to their lower case form
+        letter = letter.lower()
+
+        # We consider some words to be alternate spellings of other words and
+        # in those cases we want to normalize the spellings to our preferred
+        # spelling.
+        if letter == "alpha":
+            letter = "a"
+        elif letter == "beta":
+            letter = "b"
+        elif letter in ["c", "pre", "preview"]:
+            letter = "rc"
+        elif letter in ["rev", "r"]:
+            letter = "post"
+
+        return letter, int(number)
+    if not letter and number:
+        # We assume if we are given a number, but we are not given a letter
+        # then this is using the implicit post release syntax (e.g. 1.0-1)
+        letter = "post"
+
+        return letter, int(number)
+
+
+_local_version_seperators = re.compile(r"[\._-]")
+
+
+def _parse_local_version(local):
+    """
+    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
+    """
+    if local is not None:
+        return tuple(
+            part.lower() if not part.isdigit() else int(part)
+            for part in _local_version_seperators.split(local)
+        )
+
+
+def _cmpkey(epoch, release, pre, post, dev, local):
+    # When we compare a release version, we want to compare it with all of the
+    # trailing zeros removed. So we'll use a reverse the list, drop all the now
+    # leading zeros until we come to something non zero, then take the rest
+    # re-reverse it back into the correct order and make it a tuple and use
+    # that for our sorting key.
+    release = tuple(
+        reversed(list(
+            itertools.dropwhile(
+                lambda x: x == 0,
+                reversed(release),
+            )
+        ))
+    )
+
+    # We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
+    # We'll do this by abusing the pre segment, but we _only_ want to do this
+    # if there is not a pre or a post segment. If we have one of those then
+    # the normal sorting rules will handle this case correctly.
+    if pre is None and post is None and dev is not None:
+        pre = -Infinity
+    # Versions without a pre-release (except as noted above) should sort after
+    # those with one.
+    elif pre is None:
+        pre = Infinity
+
+    # Versions without a post segment should sort before those with one.
+    if post is None:
+        post = -Infinity
+
+    # Versions without a development segment should sort after those with one.
+    if dev is None:
+        dev = Infinity
+
+    if local is None:
+        # Versions without a local segment should sort before those with one.
+        local = -Infinity
+    else:
+        # Versions with a local segment need that segment parsed to implement
+        # the sorting rules in PEP440.
+        # - Alpha numeric segments sort before numeric segments
+        # - Alpha numeric segments sort lexicographically
+        # - Numeric segments sort numerically
+        # - Shorter versions sort before longer versions when the prefixes
+        #   match exactly
+        local = tuple(
+            (i, "") if isinstance(i, int) else (-Infinity, i)
+            for i in local
+        )
+
+    return epoch, release, pre, post, dev, local
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/pyparsing.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/pyparsing.py
new file mode 100644
index 0000000..cf75e1e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/pyparsing.py
@@ -0,0 +1,5742 @@
+# module pyparsing.py
+#
+# Copyright (c) 2003-2018  Paul T. McGuire
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__doc__ = \
+"""
+pyparsing module - Classes and methods to define and execute parsing grammars
+=============================================================================
+
+The pyparsing module is an alternative approach to creating and executing simple grammars,
+vs. the traditional lex/yacc approach, or the use of regular expressions.  With pyparsing, you
+don't need to learn a new syntax for defining grammars or matching expressions - the parsing module
+provides a library of classes that you use to construct the grammar directly in Python.
+
+Here is a program to parse "Hello, World!" (or any greeting of the form 
+C{"<salutation>, <addressee>!"}), built up using L{Word}, L{Literal}, and L{And} elements 
+(L{'+'<ParserElement.__add__>} operator gives L{And} expressions, strings are auto-converted to
+L{Literal} expressions)::
+
+    from pyparsing import Word, alphas
+
+    # define grammar of a greeting
+    greet = Word(alphas) + "," + Word(alphas) + "!"
+
+    hello = "Hello, World!"
+    print (hello, "->", greet.parseString(hello))
+
+The program outputs the following::
+
+    Hello, World! -> ['Hello', ',', 'World', '!']
+
+The Python representation of the grammar is quite readable, owing to the self-explanatory
+class names, and the use of '+', '|' and '^' operators.
+
+The L{ParseResults} object returned from L{ParserElement.parseString<ParserElement.parseString>} can be accessed as a nested list, a dictionary, or an
+object with named attributes.
+
+The pyparsing module handles some of the problems that are typically vexing when writing text parsers:
+ - extra or missing whitespace (the above program will also handle "Hello,World!", "Hello  ,  World  !", etc.)
+ - quoted strings
+ - embedded comments
+
+
+Getting Started -
+-----------------
+Visit the classes L{ParserElement} and L{ParseResults} to see the base classes that most other pyparsing
+classes inherit from. Use the docstrings for examples of how to:
+ - construct literal match expressions from L{Literal} and L{CaselessLiteral} classes
+ - construct character word-group expressions using the L{Word} class
+ - see how to create repetitive expressions using L{ZeroOrMore} and L{OneOrMore} classes
+ - use L{'+'<And>}, L{'|'<MatchFirst>}, L{'^'<Or>}, and L{'&'<Each>} operators to combine simple expressions into more complex ones
+ - associate names with your parsed results using L{ParserElement.setResultsName}
+ - find some helpful expression short-cuts like L{delimitedList} and L{oneOf}
+ - find more useful common expressions in the L{pyparsing_common} namespace class
+"""
+
+__version__ = "2.2.1"
+__versionTime__ = "18 Sep 2018 00:49 UTC"
+__author__ = "Paul McGuire <ptmcg@users.sourceforge.net>"
+
+import string
+from weakref import ref as wkref
+import copy
+import sys
+import warnings
+import re
+import sre_constants
+import collections
+import pprint
+import traceback
+import types
+from datetime import datetime
+
+try:
+    from _thread import RLock
+except ImportError:
+    from threading import RLock
+
+try:
+    # Python 3
+    from collections.abc import Iterable
+    from collections.abc import MutableMapping
+except ImportError:
+    # Python 2.7
+    from collections import Iterable
+    from collections import MutableMapping
+
+try:
+    from collections import OrderedDict as _OrderedDict
+except ImportError:
+    try:
+        from ordereddict import OrderedDict as _OrderedDict
+    except ImportError:
+        _OrderedDict = None
+
+#~ sys.stderr.write( "testing pyparsing module, version %s, %s\n" % (__version__,__versionTime__ ) )
+
+__all__ = [
+'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty',
+'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal',
+'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or',
+'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException',
+'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException',
+'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter', 
+'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore',
+'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col',
+'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString',
+'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums',
+'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno',
+'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral',
+'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables',
+'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity', 
+'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd',
+'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute',
+'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation','locatedExpr', 'withClass',
+'CloseMatch', 'tokenMap', 'pyparsing_common',
+]
+
+system_version = tuple(sys.version_info)[:3]
+PY_3 = system_version[0] == 3
+if PY_3:
+    _MAX_INT = sys.maxsize
+    basestring = str
+    unichr = chr
+    _ustr = str
+
+    # build list of single arg builtins, that can be used as parse actions
+    singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max]
+
+else:
+    _MAX_INT = sys.maxint
+    range = xrange
+
+    def _ustr(obj):
+        """Drop-in replacement for str(obj) that tries to be Unicode friendly. It first tries
+           str(obj). If that fails with a UnicodeEncodeError, then it tries unicode(obj). It
+           then < returns the unicode object | encodes it with the default encoding | ... >.
+        """
+        if isinstance(obj,unicode):
+            return obj
+
+        try:
+            # If this works, then _ustr(obj) has the same behaviour as str(obj), so
+            # it won't break any existing code.
+            return str(obj)
+
+        except UnicodeEncodeError:
+            # Else encode it
+            ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace')
+            xmlcharref = Regex(r'&#\d+;')
+            xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:])
+            return xmlcharref.transformString(ret)
+
+    # build list of single arg builtins, tolerant of Python version, that can be used as parse actions
+    singleArgBuiltins = []
+    import __builtin__
+    for fname in "sum len sorted reversed list tuple set any all min max".split():
+        try:
+            singleArgBuiltins.append(getattr(__builtin__,fname))
+        except AttributeError:
+            continue
+            
+_generatorType = type((y for y in range(1)))
+ 
+def _xml_escape(data):
+    """Escape &, <, >, ", ', etc. in a string of data."""
+
+    # ampersand must be replaced first
+    from_symbols = '&><"\''
+    to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split())
+    for from_,to_ in zip(from_symbols, to_symbols):
+        data = data.replace(from_, to_)
+    return data
+
+class _Constants(object):
+    pass
+
+alphas     = string.ascii_uppercase + string.ascii_lowercase
+nums       = "0123456789"
+hexnums    = nums + "ABCDEFabcdef"
+alphanums  = alphas + nums
+_bslash    = chr(92)
+printables = "".join(c for c in string.printable if c not in string.whitespace)
+
+class ParseBaseException(Exception):
+    """base exception class for all parsing runtime exceptions"""
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__( self, pstr, loc=0, msg=None, elem=None ):
+        self.loc = loc
+        if msg is None:
+            self.msg = pstr
+            self.pstr = ""
+        else:
+            self.msg = msg
+            self.pstr = pstr
+        self.parserElement = elem
+        self.args = (pstr, loc, msg)
+
+    @classmethod
+    def _from_exception(cls, pe):
+        """
+        internal factory method to simplify creating one type of ParseException 
+        from another - avoids having __init__ signature conflicts among subclasses
+        """
+        return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement)
+
+    def __getattr__( self, aname ):
+        """supported attributes by name are:
+            - lineno - returns the line number of the exception text
+            - col - returns the column number of the exception text
+            - line - returns the line containing the exception text
+        """
+        if( aname == "lineno" ):
+            return lineno( self.loc, self.pstr )
+        elif( aname in ("col", "column") ):
+            return col( self.loc, self.pstr )
+        elif( aname == "line" ):
+            return line( self.loc, self.pstr )
+        else:
+            raise AttributeError(aname)
+
+    def __str__( self ):
+        return "%s (at char %d), (line:%d, col:%d)" % \
+                ( self.msg, self.loc, self.lineno, self.column )
+    def __repr__( self ):
+        return _ustr(self)
+    def markInputline( self, markerString = ">!<" ):
+        """Extracts the exception line from the input string, and marks
+           the location of the exception with a special symbol.
+        """
+        line_str = self.line
+        line_column = self.column - 1
+        if markerString:
+            line_str = "".join((line_str[:line_column],
+                                markerString, line_str[line_column:]))
+        return line_str.strip()
+    def __dir__(self):
+        return "lineno col line".split() + dir(type(self))
+
+class ParseException(ParseBaseException):
+    """
+    Exception thrown when parse expressions don't match class;
+    supported attributes by name are:
+     - lineno - returns the line number of the exception text
+     - col - returns the column number of the exception text
+     - line - returns the line containing the exception text
+        
+    Example::
+        try:
+            Word(nums).setName("integer").parseString("ABC")
+        except ParseException as pe:
+            print(pe)
+            print("column: {}".format(pe.col))
+            
+    prints::
+       Expected integer (at char 0), (line:1, col:1)
+        column: 1
+    """
+    pass
+
+class ParseFatalException(ParseBaseException):
+    """user-throwable exception thrown when inconsistent parse content
+       is found; stops all parsing immediately"""
+    pass
+
+class ParseSyntaxException(ParseFatalException):
+    """just like L{ParseFatalException}, but thrown internally when an
+       L{ErrorStop<And._ErrorStop>} ('-' operator) indicates that parsing is to stop 
+       immediately because an unbacktrackable syntax error has been found"""
+    pass
+
+#~ class ReparseException(ParseBaseException):
+    #~ """Experimental class - parse actions can raise this exception to cause
+       #~ pyparsing to reparse the input string:
+        #~ - with a modified input string, and/or
+        #~ - with a modified start location
+       #~ Set the values of the ReparseException in the constructor, and raise the
+       #~ exception in a parse action to cause pyparsing to use the new string/location.
+       #~ Setting the values as None causes no change to be made.
+       #~ """
+    #~ def __init_( self, newstring, restartLoc ):
+        #~ self.newParseText = newstring
+        #~ self.reparseLoc = restartLoc
+
+class RecursiveGrammarException(Exception):
+    """exception thrown by L{ParserElement.validate} if the grammar could be improperly recursive"""
+    def __init__( self, parseElementList ):
+        self.parseElementTrace = parseElementList
+
+    def __str__( self ):
+        return "RecursiveGrammarException: %s" % self.parseElementTrace
+
+class _ParseResultsWithOffset(object):
+    def __init__(self,p1,p2):
+        self.tup = (p1,p2)
+    def __getitem__(self,i):
+        return self.tup[i]
+    def __repr__(self):
+        return repr(self.tup[0])
+    def setOffset(self,i):
+        self.tup = (self.tup[0],i)
+
+class ParseResults(object):
+    """
+    Structured parse results, to provide multiple means of access to the parsed data:
+       - as a list (C{len(results)})
+       - by list index (C{results[0], results[1]}, etc.)
+       - by attribute (C{results.<resultsName>} - see L{ParserElement.setResultsName})
+
+    Example::
+        integer = Word(nums)
+        date_str = (integer.setResultsName("year") + '/' 
+                        + integer.setResultsName("month") + '/' 
+                        + integer.setResultsName("day"))
+        # equivalent form:
+        # date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+        # parseString returns a ParseResults object
+        result = date_str.parseString("1999/12/31")
+
+        def test(s, fn=repr):
+            print("%s -> %s" % (s, fn(eval(s))))
+        test("list(result)")
+        test("result[0]")
+        test("result['month']")
+        test("result.day")
+        test("'month' in result")
+        test("'minutes' in result")
+        test("result.dump()", str)
+    prints::
+        list(result) -> ['1999', '/', '12', '/', '31']
+        result[0] -> '1999'
+        result['month'] -> '12'
+        result.day -> '31'
+        'month' in result -> True
+        'minutes' in result -> False
+        result.dump() -> ['1999', '/', '12', '/', '31']
+        - day: 31
+        - month: 12
+        - year: 1999
+    """
+    def __new__(cls, toklist=None, name=None, asList=True, modal=True ):
+        if isinstance(toklist, cls):
+            return toklist
+        retobj = object.__new__(cls)
+        retobj.__doinit = True
+        return retobj
+
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__( self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance ):
+        if self.__doinit:
+            self.__doinit = False
+            self.__name = None
+            self.__parent = None
+            self.__accumNames = {}
+            self.__asList = asList
+            self.__modal = modal
+            if toklist is None:
+                toklist = []
+            if isinstance(toklist, list):
+                self.__toklist = toklist[:]
+            elif isinstance(toklist, _generatorType):
+                self.__toklist = list(toklist)
+            else:
+                self.__toklist = [toklist]
+            self.__tokdict = dict()
+
+        if name is not None and name:
+            if not modal:
+                self.__accumNames[name] = 0
+            if isinstance(name,int):
+                name = _ustr(name) # will always return a str, but use _ustr for consistency
+            self.__name = name
+            if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None,'',[])):
+                if isinstance(toklist,basestring):
+                    toklist = [ toklist ]
+                if asList:
+                    if isinstance(toklist,ParseResults):
+                        self[name] = _ParseResultsWithOffset(toklist.copy(),0)
+                    else:
+                        self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]),0)
+                    self[name].__name = name
+                else:
+                    try:
+                        self[name] = toklist[0]
+                    except (KeyError,TypeError,IndexError):
+                        self[name] = toklist
+
+    def __getitem__( self, i ):
+        if isinstance( i, (int,slice) ):
+            return self.__toklist[i]
+        else:
+            if i not in self.__accumNames:
+                return self.__tokdict[i][-1][0]
+            else:
+                return ParseResults([ v[0] for v in self.__tokdict[i] ])
+
+    def __setitem__( self, k, v, isinstance=isinstance ):
+        if isinstance(v,_ParseResultsWithOffset):
+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [v]
+            sub = v[0]
+        elif isinstance(k,(int,slice)):
+            self.__toklist[k] = v
+            sub = v
+        else:
+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [_ParseResultsWithOffset(v,0)]
+            sub = v
+        if isinstance(sub,ParseResults):
+            sub.__parent = wkref(self)
+
+    def __delitem__( self, i ):
+        if isinstance(i,(int,slice)):
+            mylen = len( self.__toklist )
+            del self.__toklist[i]
+
+            # convert int to slice
+            if isinstance(i, int):
+                if i < 0:
+                    i += mylen
+                i = slice(i, i+1)
+            # get removed indices
+            removed = list(range(*i.indices(mylen)))
+            removed.reverse()
+            # fixup indices in token dictionary
+            for name,occurrences in self.__tokdict.items():
+                for j in removed:
+                    for k, (value, position) in enumerate(occurrences):
+                        occurrences[k] = _ParseResultsWithOffset(value, position - (position > j))
+        else:
+            del self.__tokdict[i]
+
+    def __contains__( self, k ):
+        return k in self.__tokdict
+
+    def __len__( self ): return len( self.__toklist )
+    def __bool__(self): return ( not not self.__toklist )
+    __nonzero__ = __bool__
+    def __iter__( self ): return iter( self.__toklist )
+    def __reversed__( self ): return iter( self.__toklist[::-1] )
+    def _iterkeys( self ):
+        if hasattr(self.__tokdict, "iterkeys"):
+            return self.__tokdict.iterkeys()
+        else:
+            return iter(self.__tokdict)
+
+    def _itervalues( self ):
+        return (self[k] for k in self._iterkeys())
+            
+    def _iteritems( self ):
+        return ((k, self[k]) for k in self._iterkeys())
+
+    if PY_3:
+        keys = _iterkeys       
+        """Returns an iterator of all named result keys (Python 3.x only)."""
+
+        values = _itervalues
+        """Returns an iterator of all named result values (Python 3.x only)."""
+
+        items = _iteritems
+        """Returns an iterator of all named result key-value tuples (Python 3.x only)."""
+
+    else:
+        iterkeys = _iterkeys
+        """Returns an iterator of all named result keys (Python 2.x only)."""
+
+        itervalues = _itervalues
+        """Returns an iterator of all named result values (Python 2.x only)."""
+
+        iteritems = _iteritems
+        """Returns an iterator of all named result key-value tuples (Python 2.x only)."""
+
+        def keys( self ):
+            """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iterkeys())
+
+        def values( self ):
+            """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.itervalues())
+                
+        def items( self ):
+            """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iteritems())
+
+    def haskeys( self ):
+        """Since keys() returns an iterator, this method is helpful in bypassing
+           code that looks for the existence of any defined results names."""
+        return bool(self.__tokdict)
+        
+    def pop( self, *args, **kwargs):
+        """
+        Removes and returns item at specified index (default=C{last}).
+        Supports both C{list} and C{dict} semantics for C{pop()}. If passed no
+        argument or an integer argument, it will use C{list} semantics
+        and pop tokens from the list of parsed tokens. If passed a 
+        non-integer argument (most likely a string), it will use C{dict}
+        semantics and pop the corresponding value from any defined 
+        results names. A second default return value argument is 
+        supported, just as in C{dict.pop()}.
+
+        Example::
+            def remove_first(tokens):
+                tokens.pop(0)
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+            print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321']
+
+            label = Word(alphas)
+            patt = label("LABEL") + OneOrMore(Word(nums))
+            print(patt.parseString("AAB 123 321").dump())
+
+            # Use pop() in a parse action to remove named result (note that corresponding value is not
+            # removed from list form of results)
+            def remove_LABEL(tokens):
+                tokens.pop("LABEL")
+                return tokens
+            patt.addParseAction(remove_LABEL)
+            print(patt.parseString("AAB 123 321").dump())
+        prints::
+            ['AAB', '123', '321']
+            - LABEL: AAB
+
+            ['AAB', '123', '321']
+        """
+        if not args:
+            args = [-1]
+        for k,v in kwargs.items():
+            if k == 'default':
+                args = (args[0], v)
+            else:
+                raise TypeError("pop() got an unexpected keyword argument '%s'" % k)
+        if (isinstance(args[0], int) or 
+                        len(args) == 1 or 
+                        args[0] in self):
+            index = args[0]
+            ret = self[index]
+            del self[index]
+            return ret
+        else:
+            defaultvalue = args[1]
+            return defaultvalue
+
+    def get(self, key, defaultValue=None):
+        """
+        Returns named result matching the given key, or if there is no
+        such name, then returns the given C{defaultValue} or C{None} if no
+        C{defaultValue} is specified.
+
+        Similar to C{dict.get()}.
+        
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            result = date_str.parseString("1999/12/31")
+            print(result.get("year")) # -> '1999'
+            print(result.get("hour", "not specified")) # -> 'not specified'
+            print(result.get("hour")) # -> None
+        """
+        if key in self:
+            return self[key]
+        else:
+            return defaultValue
+
+    def insert( self, index, insStr ):
+        """
+        Inserts new element at location index in the list of parsed tokens.
+        
+        Similar to C{list.insert()}.
+
+        Example::
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+
+            # use a parse action to insert the parse location in the front of the parsed results
+            def insert_locn(locn, tokens):
+                tokens.insert(0, locn)
+            print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321']
+        """
+        self.__toklist.insert(index, insStr)
+        # fixup indices in token dictionary
+        for name,occurrences in self.__tokdict.items():
+            for k, (value, position) in enumerate(occurrences):
+                occurrences[k] = _ParseResultsWithOffset(value, position + (position > index))
+
+    def append( self, item ):
+        """
+        Add single element to end of ParseResults list of elements.
+
+        Example::
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+            
+            # use a parse action to compute the sum of the parsed integers, and add it to the end
+            def append_sum(tokens):
+                tokens.append(sum(map(int, tokens)))
+            print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444]
+        """
+        self.__toklist.append(item)
+
+    def extend( self, itemseq ):
+        """
+        Add sequence of elements to end of ParseResults list of elements.
+
+        Example::
+            patt = OneOrMore(Word(alphas))
+            
+            # use a parse action to append the reverse of the matched strings, to make a palindrome
+            def make_palindrome(tokens):
+                tokens.extend(reversed([t[::-1] for t in tokens]))
+                return ''.join(tokens)
+            print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'
+        """
+        if isinstance(itemseq, ParseResults):
+            self += itemseq
+        else:
+            self.__toklist.extend(itemseq)
+
+    def clear( self ):
+        """
+        Clear all elements and results names.
+        """
+        del self.__toklist[:]
+        self.__tokdict.clear()
+
+    def __getattr__( self, name ):
+        try:
+            return self[name]
+        except KeyError:
+            return ""
+            
+        if name in self.__tokdict:
+            if name not in self.__accumNames:
+                return self.__tokdict[name][-1][0]
+            else:
+                return ParseResults([ v[0] for v in self.__tokdict[name] ])
+        else:
+            return ""
+
+    def __add__( self, other ):
+        ret = self.copy()
+        ret += other
+        return ret
+
+    def __iadd__( self, other ):
+        if other.__tokdict:
+            offset = len(self.__toklist)
+            addoffset = lambda a: offset if a<0 else a+offset
+            otheritems = other.__tokdict.items()
+            otherdictitems = [(k, _ParseResultsWithOffset(v[0],addoffset(v[1])) )
+                                for (k,vlist) in otheritems for v in vlist]
+            for k,v in otherdictitems:
+                self[k] = v
+                if isinstance(v[0],ParseResults):
+                    v[0].__parent = wkref(self)
+            
+        self.__toklist += other.__toklist
+        self.__accumNames.update( other.__accumNames )
+        return self
+
+    def __radd__(self, other):
+        if isinstance(other,int) and other == 0:
+            # useful for merging many ParseResults using sum() builtin
+            return self.copy()
+        else:
+            # this may raise a TypeError - so be it
+            return other + self
+        
+    def __repr__( self ):
+        return "(%s, %s)" % ( repr( self.__toklist ), repr( self.__tokdict ) )
+
+    def __str__( self ):
+        return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']'
+
+    def _asStringList( self, sep='' ):
+        out = []
+        for item in self.__toklist:
+            if out and sep:
+                out.append(sep)
+            if isinstance( item, ParseResults ):
+                out += item._asStringList()
+            else:
+                out.append( _ustr(item) )
+        return out
+
+    def asList( self ):
+        """
+        Returns the parse results as a nested list of matching tokens, all converted to strings.
+
+        Example::
+            patt = OneOrMore(Word(alphas))
+            result = patt.parseString("sldkj lsdkj sldkj")
+            # even though the result prints in string-like form, it is actually a pyparsing ParseResults
+            print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']
+            
+            # Use asList() to create an actual list
+            result_list = result.asList()
+            print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']
+        """
+        return [res.asList() if isinstance(res,ParseResults) else res for res in self.__toklist]
+
+    def asDict( self ):
+        """
+        Returns the named parse results as a nested dictionary.
+
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+            
+            result = date_str.parseString('12/31/1999')
+            print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})
+            
+            result_dict = result.asDict()
+            print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}
+
+            # even though a ParseResults supports dict-like access, sometime you just need to have a dict
+            import json
+            print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable
+            print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"}
+        """
+        if PY_3:
+            item_fn = self.items
+        else:
+            item_fn = self.iteritems
+            
+        def toItem(obj):
+            if isinstance(obj, ParseResults):
+                if obj.haskeys():
+                    return obj.asDict()
+                else:
+                    return [toItem(v) for v in obj]
+            else:
+                return obj
+                
+        return dict((k,toItem(v)) for k,v in item_fn())
+
+    def copy( self ):
+        """
+        Returns a new copy of a C{ParseResults} object.
+        """
+        ret = ParseResults( self.__toklist )
+        ret.__tokdict = self.__tokdict.copy()
+        ret.__parent = self.__parent
+        ret.__accumNames.update( self.__accumNames )
+        ret.__name = self.__name
+        return ret
+
+    def asXML( self, doctag=None, namedItemsOnly=False, indent="", formatted=True ):
+        """
+        (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names.
+        """
+        nl = "\n"
+        out = []
+        namedItems = dict((v[1],k) for (k,vlist) in self.__tokdict.items()
+                                                            for v in vlist)
+        nextLevelIndent = indent + "  "
+
+        # collapse out indents if formatting is not desired
+        if not formatted:
+            indent = ""
+            nextLevelIndent = ""
+            nl = ""
+
+        selfTag = None
+        if doctag is not None:
+            selfTag = doctag
+        else:
+            if self.__name:
+                selfTag = self.__name
+
+        if not selfTag:
+            if namedItemsOnly:
+                return ""
+            else:
+                selfTag = "ITEM"
+
+        out += [ nl, indent, "<", selfTag, ">" ]
+
+        for i,res in enumerate(self.__toklist):
+            if isinstance(res,ParseResults):
+                if i in namedItems:
+                    out += [ res.asXML(namedItems[i],
+                                        namedItemsOnly and doctag is None,
+                                        nextLevelIndent,
+                                        formatted)]
+                else:
+                    out += [ res.asXML(None,
+                                        namedItemsOnly and doctag is None,
+                                        nextLevelIndent,
+                                        formatted)]
+            else:
+                # individual token, see if there is a name for it
+                resTag = None
+                if i in namedItems:
+                    resTag = namedItems[i]
+                if not resTag:
+                    if namedItemsOnly:
+                        continue
+                    else:
+                        resTag = "ITEM"
+                xmlBodyText = _xml_escape(_ustr(res))
+                out += [ nl, nextLevelIndent, "<", resTag, ">",
+                                                xmlBodyText,
+                                                "</", resTag, ">" ]
+
+        out += [ nl, indent, "</", selfTag, ">" ]
+        return "".join(out)
+
+    def __lookup(self,sub):
+        for k,vlist in self.__tokdict.items():
+            for v,loc in vlist:
+                if sub is v:
+                    return k
+        return None
+
+    def getName(self):
+        r"""
+        Returns the results name for this token expression. Useful when several 
+        different expressions might match at a particular location.
+
+        Example::
+            integer = Word(nums)
+            ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
+            house_number_expr = Suppress('#') + Word(nums, alphanums)
+            user_data = (Group(house_number_expr)("house_number") 
+                        | Group(ssn_expr)("ssn")
+                        | Group(integer)("age"))
+            user_info = OneOrMore(user_data)
+            
+            result = user_info.parseString("22 111-22-3333 #221B")
+            for item in result:
+                print(item.getName(), ':', item[0])
+        prints::
+            age : 22
+            ssn : 111-22-3333
+            house_number : 221B
+        """
+        if self.__name:
+            return self.__name
+        elif self.__parent:
+            par = self.__parent()
+            if par:
+                return par.__lookup(self)
+            else:
+                return None
+        elif (len(self) == 1 and
+               len(self.__tokdict) == 1 and
+               next(iter(self.__tokdict.values()))[0][1] in (0,-1)):
+            return next(iter(self.__tokdict.keys()))
+        else:
+            return None
+
+    def dump(self, indent='', depth=0, full=True):
+        """
+        Diagnostic method for listing out the contents of a C{ParseResults}.
+        Accepts an optional C{indent} argument so that this string can be embedded
+        in a nested display of other data.
+
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+            
+            result = date_str.parseString('12/31/1999')
+            print(result.dump())
+        prints::
+            ['12', '/', '31', '/', '1999']
+            - day: 1999
+            - month: 31
+            - year: 12
+        """
+        out = []
+        NL = '\n'
+        out.append( indent+_ustr(self.asList()) )
+        if full:
+            if self.haskeys():
+                items = sorted((str(k), v) for k,v in self.items())
+                for k,v in items:
+                    if out:
+                        out.append(NL)
+                    out.append( "%s%s- %s: " % (indent,('  '*depth), k) )
+                    if isinstance(v,ParseResults):
+                        if v:
+                            out.append( v.dump(indent,depth+1) )
+                        else:
+                            out.append(_ustr(v))
+                    else:
+                        out.append(repr(v))
+            elif any(isinstance(vv,ParseResults) for vv in self):
+                v = self
+                for i,vv in enumerate(v):
+                    if isinstance(vv,ParseResults):
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),vv.dump(indent,depth+1) ))
+                    else:
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),_ustr(vv)))
+            
+        return "".join(out)
+
+    def pprint(self, *args, **kwargs):
+        """
+        Pretty-printer for parsed results as a list, using the C{pprint} module.
+        Accepts additional positional or keyword args as defined for the 
+        C{pprint.pprint} method. (U{http://docs.python.org/3/library/pprint.html#pprint.pprint})
+
+        Example::
+            ident = Word(alphas, alphanums)
+            num = Word(nums)
+            func = Forward()
+            term = ident | num | Group('(' + func + ')')
+            func <<= ident + Group(Optional(delimitedList(term)))
+            result = func.parseString("fna a,b,(fnb c,d,200),100")
+            result.pprint(width=40)
+        prints::
+            ['fna',
+             ['a',
+              'b',
+              ['(', 'fnb', ['c', 'd', '200'], ')'],
+              '100']]
+        """
+        pprint.pprint(self.asList(), *args, **kwargs)
+
+    # add support for pickle protocol
+    def __getstate__(self):
+        return ( self.__toklist,
+                 ( self.__tokdict.copy(),
+                   self.__parent is not None and self.__parent() or None,
+                   self.__accumNames,
+                   self.__name ) )
+
+    def __setstate__(self,state):
+        self.__toklist = state[0]
+        (self.__tokdict,
+         par,
+         inAccumNames,
+         self.__name) = state[1]
+        self.__accumNames = {}
+        self.__accumNames.update(inAccumNames)
+        if par is not None:
+            self.__parent = wkref(par)
+        else:
+            self.__parent = None
+
+    def __getnewargs__(self):
+        return self.__toklist, self.__name, self.__asList, self.__modal
+
+    def __dir__(self):
+        return (dir(type(self)) + list(self.keys()))
+
+MutableMapping.register(ParseResults)
+
+def col (loc,strg):
+    """Returns current column within a string, counting newlines as line separators.
+   The first column is number 1.
+
+   Note: the default parsing behavior is to expand tabs in the input string
+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information
+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+   consistent view of the parsed string, the parse location, and line and column
+   positions within the parsed string.
+   """
+    s = strg
+    return 1 if 0<loc<len(s) and s[loc-1] == '\n' else loc - s.rfind("\n", 0, loc)
+
+def lineno(loc,strg):
+    """Returns current line number within a string, counting newlines as line separators.
+   The first line is number 1.
+
+   Note: the default parsing behavior is to expand tabs in the input string
+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information
+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+   consistent view of the parsed string, the parse location, and line and column
+   positions within the parsed string.
+   """
+    return strg.count("\n",0,loc) + 1
+
+def line( loc, strg ):
+    """Returns the line of text containing loc within a string, counting newlines as line separators.
+       """
+    lastCR = strg.rfind("\n", 0, loc)
+    nextCR = strg.find("\n", loc)
+    if nextCR >= 0:
+        return strg[lastCR+1:nextCR]
+    else:
+        return strg[lastCR+1:]
+
+def _defaultStartDebugAction( instring, loc, expr ):
+    print (("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % ( lineno(loc,instring), col(loc,instring) )))
+
+def _defaultSuccessDebugAction( instring, startloc, endloc, expr, toks ):
+    print ("Matched " + _ustr(expr) + " -> " + str(toks.asList()))
+
+def _defaultExceptionDebugAction( instring, loc, expr, exc ):
+    print ("Exception raised:" + _ustr(exc))
+
+def nullDebugAction(*args):
+    """'Do-nothing' debug action, to suppress debugging output during parsing."""
+    pass
+
+# Only works on Python 3.x - nonlocal is toxic to Python 2 installs
+#~ 'decorator to trim function calls to match the arity of the target'
+#~ def _trim_arity(func, maxargs=3):
+    #~ if func in singleArgBuiltins:
+        #~ return lambda s,l,t: func(t)
+    #~ limit = 0
+    #~ foundArity = False
+    #~ def wrapper(*args):
+        #~ nonlocal limit,foundArity
+        #~ while 1:
+            #~ try:
+                #~ ret = func(*args[limit:])
+                #~ foundArity = True
+                #~ return ret
+            #~ except TypeError:
+                #~ if limit == maxargs or foundArity:
+                    #~ raise
+                #~ limit += 1
+                #~ continue
+    #~ return wrapper
+
+# this version is Python 2.x-3.x cross-compatible
+'decorator to trim function calls to match the arity of the target'
+def _trim_arity(func, maxargs=2):
+    if func in singleArgBuiltins:
+        return lambda s,l,t: func(t)
+    limit = [0]
+    foundArity = [False]
+    
+    # traceback return data structure changed in Py3.5 - normalize back to plain tuples
+    if system_version[:2] >= (3,5):
+        def extract_stack(limit=0):
+            # special handling for Python 3.5.0 - extra deep call stack by 1
+            offset = -3 if system_version == (3,5,0) else -2
+            frame_summary = traceback.extract_stack(limit=-offset+limit-1)[offset]
+            return [frame_summary[:2]]
+        def extract_tb(tb, limit=0):
+            frames = traceback.extract_tb(tb, limit=limit)
+            frame_summary = frames[-1]
+            return [frame_summary[:2]]
+    else:
+        extract_stack = traceback.extract_stack
+        extract_tb = traceback.extract_tb
+    
+    # synthesize what would be returned by traceback.extract_stack at the call to 
+    # user's parse action 'func', so that we don't incur call penalty at parse time
+    
+    LINE_DIFF = 6
+    # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND 
+    # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!!
+    this_line = extract_stack(limit=2)[-1]
+    pa_call_line_synth = (this_line[0], this_line[1]+LINE_DIFF)
+
+    def wrapper(*args):
+        while 1:
+            try:
+                ret = func(*args[limit[0]:])
+                foundArity[0] = True
+                return ret
+            except TypeError:
+                # re-raise TypeErrors if they did not come from our arity testing
+                if foundArity[0]:
+                    raise
+                else:
+                    try:
+                        tb = sys.exc_info()[-1]
+                        if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth:
+                            raise
+                    finally:
+                        del tb
+
+                if limit[0] <= maxargs:
+                    limit[0] += 1
+                    continue
+                raise
+
+    # copy func name to wrapper for sensible debug output
+    func_name = "<parse action>"
+    try:
+        func_name = getattr(func, '__name__', 
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    wrapper.__name__ = func_name
+
+    return wrapper
+
+class ParserElement(object):
+    """Abstract base level parser element class."""
+    DEFAULT_WHITE_CHARS = " \n\t\r"
+    verbose_stacktrace = False
+
+    @staticmethod
+    def setDefaultWhitespaceChars( chars ):
+        r"""
+        Overrides the default whitespace chars
+
+        Example::
+            # default whitespace chars are space, <TAB> and newline
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def', 'ghi', 'jkl']
+            
+            # change to just treat newline as significant
+            ParserElement.setDefaultWhitespaceChars(" \t")
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def']
+        """
+        ParserElement.DEFAULT_WHITE_CHARS = chars
+
+    @staticmethod
+    def inlineLiteralsUsing(cls):
+        """
+        Set class to be used for inclusion of string literals into a parser.
+        
+        Example::
+            # default literal class used is Literal
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+
+            # change to Suppress
+            ParserElement.inlineLiteralsUsing(Suppress)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '12', '31']
+        """
+        ParserElement._literalStringClass = cls
+
+    def __init__( self, savelist=False ):
+        self.parseAction = list()
+        self.failAction = None
+        #~ self.name = "<unknown>"  # don't define self.name, let subclasses try/except upcall
+        self.strRepr = None
+        self.resultsName = None
+        self.saveAsList = savelist
+        self.skipWhitespace = True
+        self.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
+        self.copyDefaultWhiteChars = True
+        self.mayReturnEmpty = False # used when checking for left-recursion
+        self.keepTabs = False
+        self.ignoreExprs = list()
+        self.debug = False
+        self.streamlined = False
+        self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index
+        self.errmsg = ""
+        self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all)
+        self.debugActions = ( None, None, None ) #custom debug actions
+        self.re = None
+        self.callPreparse = True # used to avoid redundant calls to preParse
+        self.callDuringTry = False
+
+    def copy( self ):
+        """
+        Make a copy of this C{ParserElement}.  Useful for defining different parse actions
+        for the same parsing pattern, using copies of the original parse element.
+        
+        Example::
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K")
+            integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
+            
+            print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))
+        prints::
+            [5120, 100, 655360, 268435456]
+        Equivalent form of C{expr.copy()} is just C{expr()}::
+            integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
+        """
+        cpy = copy.copy( self )
+        cpy.parseAction = self.parseAction[:]
+        cpy.ignoreExprs = self.ignoreExprs[:]
+        if self.copyDefaultWhiteChars:
+            cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
+        return cpy
+
+    def setName( self, name ):
+        """
+        Define name for this expression, makes debugging and exception messages clearer.
+        
+        Example::
+            Word(nums).parseString("ABC")  # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)
+            Word(nums).setName("integer").parseString("ABC")  # -> Exception: Expected integer (at char 0), (line:1, col:1)
+        """
+        self.name = name
+        self.errmsg = "Expected " + self.name
+        if hasattr(self,"exception"):
+            self.exception.msg = self.errmsg
+        return self
+
+    def setResultsName( self, name, listAllMatches=False ):
+        """
+        Define name for referencing matching tokens as a nested attribute
+        of the returned parse results.
+        NOTE: this returns a *copy* of the original C{ParserElement} object;
+        this is so that the client can define a basic element, such as an
+        integer, and reference it in multiple places with different names.
+
+        You can also set results names using the abbreviated syntax,
+        C{expr("name")} in place of C{expr.setResultsName("name")} - 
+        see L{I{__call__}<__call__>}.
+
+        Example::
+            date_str = (integer.setResultsName("year") + '/' 
+                        + integer.setResultsName("month") + '/' 
+                        + integer.setResultsName("day"))
+
+            # equivalent form:
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+        """
+        newself = self.copy()
+        if name.endswith("*"):
+            name = name[:-1]
+            listAllMatches=True
+        newself.resultsName = name
+        newself.modalResults = not listAllMatches
+        return newself
+
+    def setBreak(self,breakFlag = True):
+        """Method to invoke the Python pdb debugger when this element is
+           about to be parsed. Set C{breakFlag} to True to enable, False to
+           disable.
+        """
+        if breakFlag:
+            _parseMethod = self._parse
+            def breaker(instring, loc, doActions=True, callPreParse=True):
+                import pdb
+                pdb.set_trace()
+                return _parseMethod( instring, loc, doActions, callPreParse )
+            breaker._originalParseMethod = _parseMethod
+            self._parse = breaker
+        else:
+            if hasattr(self._parse,"_originalParseMethod"):
+                self._parse = self._parse._originalParseMethod
+        return self
+
+    def setParseAction( self, *fns, **kwargs ):
+        """
+        Define one or more actions to perform when successfully matching parse element definition.
+        Parse action fn is a callable method with 0-3 arguments, called as C{fn(s,loc,toks)},
+        C{fn(loc,toks)}, C{fn(toks)}, or just C{fn()}, where:
+         - s   = the original string being parsed (see note below)
+         - loc = the location of the matching substring
+         - toks = a list of the matched tokens, packaged as a C{L{ParseResults}} object
+        If the functions in fns modify the tokens, they can return them as the return
+        value from fn, and the modified list of tokens will replace the original.
+        Otherwise, fn does not need to return any value.
+
+        Optional keyword arguments:
+         - callDuringTry = (default=C{False}) indicate if parse action should be run during lookaheads and alternate testing
+
+        Note: the default parsing behavior is to expand tabs in the input string
+        before starting the parsing process.  See L{I{parseString}<parseString>} for more information
+        on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+        consistent view of the parsed string, the parse location, and line and column
+        positions within the parsed string.
+        
+        Example::
+            integer = Word(nums)
+            date_str = integer + '/' + integer + '/' + integer
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+            # use parse action to convert to ints at parse time
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            date_str = integer + '/' + integer + '/' + integer
+
+            # note that integer fields are now ints, not strings
+            date_str.parseString("1999/12/31")  # -> [1999, '/', 12, '/', 31]
+        """
+        self.parseAction = list(map(_trim_arity, list(fns)))
+        self.callDuringTry = kwargs.get("callDuringTry", False)
+        return self
+
+    def addParseAction( self, *fns, **kwargs ):
+        """
+        Add one or more parse actions to expression's list of parse actions. See L{I{setParseAction}<setParseAction>}.
+        
+        See examples in L{I{copy}<copy>}.
+        """
+        self.parseAction += list(map(_trim_arity, list(fns)))
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def addCondition(self, *fns, **kwargs):
+        """Add a boolean predicate function to expression's list of parse actions. See 
+        L{I{setParseAction}<setParseAction>} for function call signatures. Unlike C{setParseAction}, 
+        functions passed to C{addCondition} need to return boolean success/fail of the condition.
+
+        Optional keyword arguments:
+         - message = define a custom message to be used in the raised exception
+         - fatal   = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException
+         
+        Example::
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            year_int = integer.copy()
+            year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")
+            date_str = year_int + '/' + integer + '/' + integer
+
+            result = date_str.parseString("1999/12/31")  # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1)
+        """
+        msg = kwargs.get("message", "failed user-defined condition")
+        exc_type = ParseFatalException if kwargs.get("fatal", False) else ParseException
+        for fn in fns:
+            def pa(s,l,t):
+                if not bool(_trim_arity(fn)(s,l,t)):
+                    raise exc_type(s,l,msg)
+            self.parseAction.append(pa)
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def setFailAction( self, fn ):
+        """Define action to perform if parsing fails at this expression.
+           Fail acton fn is a callable function that takes the arguments
+           C{fn(s,loc,expr,err)} where:
+            - s = string being parsed
+            - loc = location where expression match was attempted and failed
+            - expr = the parse expression that failed
+            - err = the exception thrown
+           The function returns no value.  It may throw C{L{ParseFatalException}}
+           if it is desired to stop parsing immediately."""
+        self.failAction = fn
+        return self
+
+    def _skipIgnorables( self, instring, loc ):
+        exprsFound = True
+        while exprsFound:
+            exprsFound = False
+            for e in self.ignoreExprs:
+                try:
+                    while 1:
+                        loc,dummy = e._parse( instring, loc )
+                        exprsFound = True
+                except ParseException:
+                    pass
+        return loc
+
+    def preParse( self, instring, loc ):
+        if self.ignoreExprs:
+            loc = self._skipIgnorables( instring, loc )
+
+        if self.skipWhitespace:
+            wt = self.whiteChars
+            instrlen = len(instring)
+            while loc < instrlen and instring[loc] in wt:
+                loc += 1
+
+        return loc
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        return loc, []
+
+    def postParse( self, instring, loc, tokenlist ):
+        return tokenlist
+
+    #~ @profile
+    def _parseNoCache( self, instring, loc, doActions=True, callPreParse=True ):
+        debugging = ( self.debug ) #and doActions )
+
+        if debugging or self.failAction:
+            #~ print ("Match",self,"at loc",loc,"(%d,%d)" % ( lineno(loc,instring), col(loc,instring) ))
+            if (self.debugActions[0] ):
+                self.debugActions[0]( instring, loc, self )
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse( instring, loc )
+            else:
+                preloc = loc
+            tokensStart = preloc
+            try:
+                try:
+                    loc,tokens = self.parseImpl( instring, preloc, doActions )
+                except IndexError:
+                    raise ParseException( instring, len(instring), self.errmsg, self )
+            except ParseBaseException as err:
+                #~ print ("Exception raised:", err)
+                if self.debugActions[2]:
+                    self.debugActions[2]( instring, tokensStart, self, err )
+                if self.failAction:
+                    self.failAction( instring, tokensStart, self, err )
+                raise
+        else:
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse( instring, loc )
+            else:
+                preloc = loc
+            tokensStart = preloc
+            if self.mayIndexError or preloc >= len(instring):
+                try:
+                    loc,tokens = self.parseImpl( instring, preloc, doActions )
+                except IndexError:
+                    raise ParseException( instring, len(instring), self.errmsg, self )
+            else:
+                loc,tokens = self.parseImpl( instring, preloc, doActions )
+
+        tokens = self.postParse( instring, loc, tokens )
+
+        retTokens = ParseResults( tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults )
+        if self.parseAction and (doActions or self.callDuringTry):
+            if debugging:
+                try:
+                    for fn in self.parseAction:
+                        tokens = fn( instring, tokensStart, retTokens )
+                        if tokens is not None:
+                            retTokens = ParseResults( tokens,
+                                                      self.resultsName,
+                                                      asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
+                                                      modal=self.modalResults )
+                except ParseBaseException as err:
+                    #~ print "Exception raised in user parse action:", err
+                    if (self.debugActions[2] ):
+                        self.debugActions[2]( instring, tokensStart, self, err )
+                    raise
+            else:
+                for fn in self.parseAction:
+                    tokens = fn( instring, tokensStart, retTokens )
+                    if tokens is not None:
+                        retTokens = ParseResults( tokens,
+                                                  self.resultsName,
+                                                  asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
+                                                  modal=self.modalResults )
+        if debugging:
+            #~ print ("Matched",self,"->",retTokens.asList())
+            if (self.debugActions[1] ):
+                self.debugActions[1]( instring, tokensStart, loc, self, retTokens )
+
+        return loc, retTokens
+
+    def tryParse( self, instring, loc ):
+        try:
+            return self._parse( instring, loc, doActions=False )[0]
+        except ParseFatalException:
+            raise ParseException( instring, loc, self.errmsg, self)
+    
+    def canParseNext(self, instring, loc):
+        try:
+            self.tryParse(instring, loc)
+        except (ParseException, IndexError):
+            return False
+        else:
+            return True
+
+    class _UnboundedCache(object):
+        def __init__(self):
+            cache = {}
+            self.not_in_cache = not_in_cache = object()
+
+            def get(self, key):
+                return cache.get(key, not_in_cache)
+
+            def set(self, key, value):
+                cache[key] = value
+
+            def clear(self):
+                cache.clear()
+                
+            def cache_len(self):
+                return len(cache)
+
+            self.get = types.MethodType(get, self)
+            self.set = types.MethodType(set, self)
+            self.clear = types.MethodType(clear, self)
+            self.__len__ = types.MethodType(cache_len, self)
+
+    if _OrderedDict is not None:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = _OrderedDict()
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(cache) > size:
+                        try:
+                            cache.popitem(False)
+                        except KeyError:
+                            pass
+
+                def clear(self):
+                    cache.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    else:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = {}
+                key_fifo = collections.deque([], size)
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(key_fifo) > size:
+                        cache.pop(key_fifo.popleft(), None)
+                    key_fifo.append(key)
+
+                def clear(self):
+                    cache.clear()
+                    key_fifo.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    # argument cache for optimizing repeated calls when backtracking through recursive expressions
+    packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail
+    packrat_cache_lock = RLock()
+    packrat_cache_stats = [0, 0]
+
+    # this method gets repeatedly called during backtracking with the same arguments -
+    # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression
+    def _parseCache( self, instring, loc, doActions=True, callPreParse=True ):
+        HIT, MISS = 0, 1
+        lookup = (self, instring, loc, callPreParse, doActions)
+        with ParserElement.packrat_cache_lock:
+            cache = ParserElement.packrat_cache
+            value = cache.get(lookup)
+            if value is cache.not_in_cache:
+                ParserElement.packrat_cache_stats[MISS] += 1
+                try:
+                    value = self._parseNoCache(instring, loc, doActions, callPreParse)
+                except ParseBaseException as pe:
+                    # cache a copy of the exception, without the traceback
+                    cache.set(lookup, pe.__class__(*pe.args))
+                    raise
+                else:
+                    cache.set(lookup, (value[0], value[1].copy()))
+                    return value
+            else:
+                ParserElement.packrat_cache_stats[HIT] += 1
+                if isinstance(value, Exception):
+                    raise value
+                return (value[0], value[1].copy())
+
+    _parse = _parseNoCache
+
+    @staticmethod
+    def resetCache():
+        ParserElement.packrat_cache.clear()
+        ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats)
+
+    _packratEnabled = False
+    @staticmethod
+    def enablePackrat(cache_size_limit=128):
+        """Enables "packrat" parsing, which adds memoizing to the parsing logic.
+           Repeated parse attempts at the same string location (which happens
+           often in many complex grammars) can immediately return a cached value,
+           instead of re-executing parsing/validating code.  Memoizing is done of
+           both valid results and parsing exceptions.
+           
+           Parameters:
+            - cache_size_limit - (default=C{128}) - if an integer value is provided
+              will limit the size of the packrat cache; if None is passed, then
+              the cache size will be unbounded; if 0 is passed, the cache will
+              be effectively disabled.
+            
+           This speedup may break existing programs that use parse actions that
+           have side-effects.  For this reason, packrat parsing is disabled when
+           you first import pyparsing.  To activate the packrat feature, your
+           program must call the class method C{ParserElement.enablePackrat()}.  If
+           your program uses C{psyco} to "compile as you go", you must call
+           C{enablePackrat} before calling C{psyco.full()}.  If you do not do this,
+           Python will crash.  For best results, call C{enablePackrat()} immediately
+           after importing pyparsing.
+           
+           Example::
+               import pyparsing
+               pyparsing.ParserElement.enablePackrat()
+        """
+        if not ParserElement._packratEnabled:
+            ParserElement._packratEnabled = True
+            if cache_size_limit is None:
+                ParserElement.packrat_cache = ParserElement._UnboundedCache()
+            else:
+                ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit)
+            ParserElement._parse = ParserElement._parseCache
+
+    def parseString( self, instring, parseAll=False ):
+        """
+        Execute the parse expression with the given string.
+        This is the main interface to the client code, once the complete
+        expression has been built.
+
+        If you want the grammar to require that the entire input string be
+        successfully parsed, then set C{parseAll} to True (equivalent to ending
+        the grammar with C{L{StringEnd()}}).
+
+        Note: C{parseString} implicitly calls C{expandtabs()} on the input string,
+        in order to report proper column numbers in parse actions.
+        If the input string contains tabs and
+        the grammar uses parse actions that use the C{loc} argument to index into the
+        string being parsed, you can ensure you have a consistent view of the input
+        string by:
+         - calling C{parseWithTabs} on your grammar before calling C{parseString}
+           (see L{I{parseWithTabs}<parseWithTabs>})
+         - define your parse action using the full C{(s,loc,toks)} signature, and
+           reference the input string using the parse action's C{s} argument
+         - explictly expand the tabs in your input string before calling
+           C{parseString}
+        
+        Example::
+            Word('a').parseString('aaaaabaaa')  # -> ['aaaaa']
+            Word('a').parseString('aaaaabaaa', parseAll=True)  # -> Exception: Expected end of text
+        """
+        ParserElement.resetCache()
+        if not self.streamlined:
+            self.streamline()
+            #~ self.saveAsList = True
+        for e in self.ignoreExprs:
+            e.streamline()
+        if not self.keepTabs:
+            instring = instring.expandtabs()
+        try:
+            loc, tokens = self._parse( instring, 0 )
+            if parseAll:
+                loc = self.preParse( instring, loc )
+                se = Empty() + StringEnd()
+                se._parse( instring, loc )
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+        else:
+            return tokens
+
+    def scanString( self, instring, maxMatches=_MAX_INT, overlap=False ):
+        """
+        Scan the input string for expression matches.  Each match will return the
+        matching tokens, start location, and end location.  May be called with optional
+        C{maxMatches} argument, to clip scanning after 'n' matches are found.  If
+        C{overlap} is specified, then overlapping matches will be reported.
+
+        Note that the start and end locations are reported relative to the string
+        being parsed.  See L{I{parseString}<parseString>} for more information on parsing
+        strings with embedded tabs.
+
+        Example::
+            source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"
+            print(source)
+            for tokens,start,end in Word(alphas).scanString(source):
+                print(' '*start + '^'*(end-start))
+                print(' '*start + tokens[0])
+        
+        prints::
+        
+            sldjf123lsdjjkf345sldkjf879lkjsfd987
+            ^^^^^
+            sldjf
+                    ^^^^^^^
+                    lsdjjkf
+                              ^^^^^^
+                              sldkjf
+                                       ^^^^^^
+                                       lkjsfd
+        """
+        if not self.streamlined:
+            self.streamline()
+        for e in self.ignoreExprs:
+            e.streamline()
+
+        if not self.keepTabs:
+            instring = _ustr(instring).expandtabs()
+        instrlen = len(instring)
+        loc = 0
+        preparseFn = self.preParse
+        parseFn = self._parse
+        ParserElement.resetCache()
+        matches = 0
+        try:
+            while loc <= instrlen and matches < maxMatches:
+                try:
+                    preloc = preparseFn( instring, loc )
+                    nextLoc,tokens = parseFn( instring, preloc, callPreParse=False )
+                except ParseException:
+                    loc = preloc+1
+                else:
+                    if nextLoc > loc:
+                        matches += 1
+                        yield tokens, preloc, nextLoc
+                        if overlap:
+                            nextloc = preparseFn( instring, loc )
+                            if nextloc > loc:
+                                loc = nextLoc
+                            else:
+                                loc += 1
+                        else:
+                            loc = nextLoc
+                    else:
+                        loc = preloc+1
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def transformString( self, instring ):
+        """
+        Extension to C{L{scanString}}, to modify matching text with modified tokens that may
+        be returned from a parse action.  To use C{transformString}, define a grammar and
+        attach a parse action to it that modifies the returned token list.
+        Invoking C{transformString()} on a target string will then scan for matches,
+        and replace the matched text patterns according to the logic in the parse
+        action.  C{transformString()} returns the resulting transformed string.
+        
+        Example::
+            wd = Word(alphas)
+            wd.setParseAction(lambda toks: toks[0].title())
+            
+            print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york."))
+        Prints::
+            Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.
+        """
+        out = []
+        lastE = 0
+        # force preservation of <TAB>s, to minimize unwanted transformation of string, and to
+        # keep string locs straight between transformString and scanString
+        self.keepTabs = True
+        try:
+            for t,s,e in self.scanString( instring ):
+                out.append( instring[lastE:s] )
+                if t:
+                    if isinstance(t,ParseResults):
+                        out += t.asList()
+                    elif isinstance(t,list):
+                        out += t
+                    else:
+                        out.append(t)
+                lastE = e
+            out.append(instring[lastE:])
+            out = [o for o in out if o]
+            return "".join(map(_ustr,_flatten(out)))
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def searchString( self, instring, maxMatches=_MAX_INT ):
+        """
+        Another extension to C{L{scanString}}, simplifying the access to the tokens found
+        to match the given parse expression.  May be called with optional
+        C{maxMatches} argument, to clip searching after 'n' matches are found.
+        
+        Example::
+            # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters
+            cap_word = Word(alphas.upper(), alphas.lower())
+            
+            print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))
+
+            # the sum() builtin can be used to merge results into a single ParseResults object
+            print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")))
+        prints::
+            [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]
+            ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']
+        """
+        try:
+            return ParseResults([ t for t,s,e in self.scanString( instring, maxMatches ) ])
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False):
+        """
+        Generator method to split a string using the given expression as a separator.
+        May be called with optional C{maxsplit} argument, to limit the number of splits;
+        and the optional C{includeSeparators} argument (default=C{False}), if the separating
+        matching text should be included in the split results.
+        
+        Example::        
+            punc = oneOf(list(".,;:/-!?"))
+            print(list(punc.split("This, this?, this sentence, is badly punctuated!")))
+        prints::
+            ['This', ' this', '', ' this sentence', ' is badly punctuated', '']
+        """
+        splits = 0
+        last = 0
+        for t,s,e in self.scanString(instring, maxMatches=maxsplit):
+            yield instring[last:s]
+            if includeSeparators:
+                yield t[0]
+            last = e
+        yield instring[last:]
+
+    def __add__(self, other ):
+        """
+        Implementation of + operator - returns C{L{And}}. Adding strings to a ParserElement
+        converts them to L{Literal}s by default.
+        
+        Example::
+            greet = Word(alphas) + "," + Word(alphas) + "!"
+            hello = "Hello, World!"
+            print (hello, "->", greet.parseString(hello))
+        Prints::
+            Hello, World! -> ['Hello', ',', 'World', '!']
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return And( [ self, other ] )
+
+    def __radd__(self, other ):
+        """
+        Implementation of + operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other + self
+
+    def __sub__(self, other):
+        """
+        Implementation of - operator, returns C{L{And}} with error stop
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return self + And._ErrorStop() + other
+
+    def __rsub__(self, other ):
+        """
+        Implementation of - operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other - self
+
+    def __mul__(self,other):
+        """
+        Implementation of * operator, allows use of C{expr * 3} in place of
+        C{expr + expr + expr}.  Expressions may also me multiplied by a 2-integer
+        tuple, similar to C{{min,max}} multipliers in regular expressions.  Tuples
+        may also include C{None} as in:
+         - C{expr*(n,None)} or C{expr*(n,)} is equivalent
+              to C{expr*n + L{ZeroOrMore}(expr)}
+              (read as "at least n instances of C{expr}")
+         - C{expr*(None,n)} is equivalent to C{expr*(0,n)}
+              (read as "0 to n instances of C{expr}")
+         - C{expr*(None,None)} is equivalent to C{L{ZeroOrMore}(expr)}
+         - C{expr*(1,None)} is equivalent to C{L{OneOrMore}(expr)}
+
+        Note that C{expr*(None,n)} does not raise an exception if
+        more than n exprs exist in the input stream; that is,
+        C{expr*(None,n)} does not enforce a maximum number of expr
+        occurrences.  If this behavior is desired, then write
+        C{expr*(None,n) + ~expr}
+        """
+        if isinstance(other,int):
+            minElements, optElements = other,0
+        elif isinstance(other,tuple):
+            other = (other + (None, None))[:2]
+            if other[0] is None:
+                other = (0, other[1])
+            if isinstance(other[0],int) and other[1] is None:
+                if other[0] == 0:
+                    return ZeroOrMore(self)
+                if other[0] == 1:
+                    return OneOrMore(self)
+                else:
+                    return self*other[0] + ZeroOrMore(self)
+            elif isinstance(other[0],int) and isinstance(other[1],int):
+                minElements, optElements = other
+                optElements -= minElements
+            else:
+                raise TypeError("cannot multiply 'ParserElement' and ('%s','%s') objects", type(other[0]),type(other[1]))
+        else:
+            raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other))
+
+        if minElements < 0:
+            raise ValueError("cannot multiply ParserElement by negative value")
+        if optElements < 0:
+            raise ValueError("second tuple value must be greater or equal to first tuple value")
+        if minElements == optElements == 0:
+            raise ValueError("cannot multiply ParserElement by 0 or (0,0)")
+
+        if (optElements):
+            def makeOptionalList(n):
+                if n>1:
+                    return Optional(self + makeOptionalList(n-1))
+                else:
+                    return Optional(self)
+            if minElements:
+                if minElements == 1:
+                    ret = self + makeOptionalList(optElements)
+                else:
+                    ret = And([self]*minElements) + makeOptionalList(optElements)
+            else:
+                ret = makeOptionalList(optElements)
+        else:
+            if minElements == 1:
+                ret = self
+            else:
+                ret = And([self]*minElements)
+        return ret
+
+    def __rmul__(self, other):
+        return self.__mul__(other)
+
+    def __or__(self, other ):
+        """
+        Implementation of | operator - returns C{L{MatchFirst}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return MatchFirst( [ self, other ] )
+
+    def __ror__(self, other ):
+        """
+        Implementation of | operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other | self
+
+    def __xor__(self, other ):
+        """
+        Implementation of ^ operator - returns C{L{Or}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return Or( [ self, other ] )
+
+    def __rxor__(self, other ):
+        """
+        Implementation of ^ operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other ^ self
+
+    def __and__(self, other ):
+        """
+        Implementation of & operator - returns C{L{Each}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return Each( [ self, other ] )
+
+    def __rand__(self, other ):
+        """
+        Implementation of & operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other & self
+
+    def __invert__( self ):
+        """
+        Implementation of ~ operator - returns C{L{NotAny}}
+        """
+        return NotAny( self )
+
+    def __call__(self, name=None):
+        """
+        Shortcut for C{L{setResultsName}}, with C{listAllMatches=False}.
+        
+        If C{name} is given with a trailing C{'*'} character, then C{listAllMatches} will be
+        passed as C{True}.
+           
+        If C{name} is omitted, same as calling C{L{copy}}.
+
+        Example::
+            # these are equivalent
+            userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno")
+            userdata = Word(alphas)("name") + Word(nums+"-")("socsecno")             
+        """
+        if name is not None:
+            return self.setResultsName(name)
+        else:
+            return self.copy()
+
+    def suppress( self ):
+        """
+        Suppresses the output of this C{ParserElement}; useful to keep punctuation from
+        cluttering up returned output.
+        """
+        return Suppress( self )
+
+    def leaveWhitespace( self ):
+        """
+        Disables the skipping of whitespace before matching the characters in the
+        C{ParserElement}'s defined pattern.  This is normally only used internally by
+        the pyparsing module, but may be needed in some whitespace-sensitive grammars.
+        """
+        self.skipWhitespace = False
+        return self
+
+    def setWhitespaceChars( self, chars ):
+        """
+        Overrides the default whitespace chars
+        """
+        self.skipWhitespace = True
+        self.whiteChars = chars
+        self.copyDefaultWhiteChars = False
+        return self
+
+    def parseWithTabs( self ):
+        """
+        Overrides default behavior to expand C{<TAB>}s to spaces before parsing the input string.
+        Must be called before C{parseString} when the input grammar contains elements that
+        match C{<TAB>} characters.
+        """
+        self.keepTabs = True
+        return self
+
+    def ignore( self, other ):
+        """
+        Define expression to be ignored (e.g., comments) while doing pattern
+        matching; may be called repeatedly, to define multiple comment or other
+        ignorable patterns.
+        
+        Example::
+            patt = OneOrMore(Word(alphas))
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']
+            
+            patt.ignore(cStyleComment)
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']
+        """
+        if isinstance(other, basestring):
+            other = Suppress(other)
+
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                self.ignoreExprs.append(other)
+        else:
+            self.ignoreExprs.append( Suppress( other.copy() ) )
+        return self
+
+    def setDebugActions( self, startAction, successAction, exceptionAction ):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        """
+        self.debugActions = (startAction or _defaultStartDebugAction,
+                             successAction or _defaultSuccessDebugAction,
+                             exceptionAction or _defaultExceptionDebugAction)
+        self.debug = True
+        return self
+
+    def setDebug( self, flag=True ):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        Set C{flag} to True to enable, False to disable.
+
+        Example::
+            wd = Word(alphas).setName("alphaword")
+            integer = Word(nums).setName("numword")
+            term = wd | integer
+            
+            # turn on debugging for wd
+            wd.setDebug()
+
+            OneOrMore(term).parseString("abc 123 xyz 890")
+        
+        prints::
+            Match alphaword at loc 0(1,1)
+            Matched alphaword -> ['abc']
+            Match alphaword at loc 3(1,4)
+            Exception raised:Expected alphaword (at char 4), (line:1, col:5)
+            Match alphaword at loc 7(1,8)
+            Matched alphaword -> ['xyz']
+            Match alphaword at loc 11(1,12)
+            Exception raised:Expected alphaword (at char 12), (line:1, col:13)
+            Match alphaword at loc 15(1,16)
+            Exception raised:Expected alphaword (at char 15), (line:1, col:16)
+
+        The output shown is that produced by the default debug actions - custom debug actions can be
+        specified using L{setDebugActions}. Prior to attempting
+        to match the C{wd} expression, the debugging message C{"Match <exprname> at loc <n>(<line>,<col>)"}
+        is shown. Then if the parse succeeds, a C{"Matched"} message is shown, or an C{"Exception raised"}
+        message is shown. Also note the use of L{setName} to assign a human-readable name to the expression,
+        which makes debugging and exception messages easier to understand - for instance, the default
+        name created for the C{Word} expression without calling C{setName} is C{"W:(ABCD...)"}.
+        """
+        if flag:
+            self.setDebugActions( _defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction )
+        else:
+            self.debug = False
+        return self
+
+    def __str__( self ):
+        return self.name
+
+    def __repr__( self ):
+        return _ustr(self)
+
+    def streamline( self ):
+        self.streamlined = True
+        self.strRepr = None
+        return self
+
+    def checkRecursion( self, parseElementList ):
+        pass
+
+    def validate( self, validateTrace=[] ):
+        """
+        Check defined expressions for valid structure, check for infinite recursive definitions.
+        """
+        self.checkRecursion( [] )
+
+    def parseFile( self, file_or_filename, parseAll=False ):
+        """
+        Execute the parse expression on the given file or filename.
+        If a filename is specified (instead of a file object),
+        the entire file is opened, read, and closed before parsing.
+        """
+        try:
+            file_contents = file_or_filename.read()
+        except AttributeError:
+            with open(file_or_filename, "r") as f:
+                file_contents = f.read()
+        try:
+            return self.parseString(file_contents, parseAll)
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def __eq__(self,other):
+        if isinstance(other, ParserElement):
+            return self is other or vars(self) == vars(other)
+        elif isinstance(other, basestring):
+            return self.matches(other)
+        else:
+            return super(ParserElement,self)==other
+
+    def __ne__(self,other):
+        return not (self == other)
+
+    def __hash__(self):
+        return hash(id(self))
+
+    def __req__(self,other):
+        return self == other
+
+    def __rne__(self,other):
+        return not (self == other)
+
+    def matches(self, testString, parseAll=True):
+        """
+        Method for quick testing of a parser against a test string. Good for simple 
+        inline microtests of sub expressions while building up larger parser.
+           
+        Parameters:
+         - testString - to test against this expression for a match
+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests
+            
+        Example::
+            expr = Word(nums)
+            assert expr.matches("100")
+        """
+        try:
+            self.parseString(_ustr(testString), parseAll=parseAll)
+            return True
+        except ParseBaseException:
+            return False
+                
+    def runTests(self, tests, parseAll=True, comment='#', fullDump=True, printResults=True, failureTests=False):
+        """
+        Execute the parse expression on a series of test strings, showing each
+        test, the parsed results or where the parse failed. Quick and easy way to
+        run a parse expression against a list of sample strings.
+           
+        Parameters:
+         - tests - a list of separate test strings, or a multiline string of test strings
+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests           
+         - comment - (default=C{'#'}) - expression for indicating embedded comments in the test 
+              string; pass None to disable comment filtering
+         - fullDump - (default=C{True}) - dump results as list followed by results names in nested outline;
+              if False, only dump nested list
+         - printResults - (default=C{True}) prints test output to stdout
+         - failureTests - (default=C{False}) indicates if these tests are expected to fail parsing
+
+        Returns: a (success, results) tuple, where success indicates that all tests succeeded
+        (or failed if C{failureTests} is True), and the results contain a list of lines of each 
+        test's output
+        
+        Example::
+            number_expr = pyparsing_common.number.copy()
+
+            result = number_expr.runTests('''
+                # unsigned integer
+                100
+                # negative integer
+                -100
+                # float with scientific notation
+                6.02e23
+                # integer with scientific notation
+                1e-12
+                ''')
+            print("Success" if result[0] else "Failed!")
+
+            result = number_expr.runTests('''
+                # stray character
+                100Z
+                # missing leading digit before '.'
+                -.100
+                # too many '.'
+                3.14.159
+                ''', failureTests=True)
+            print("Success" if result[0] else "Failed!")
+        prints::
+            # unsigned integer
+            100
+            [100]
+
+            # negative integer
+            -100
+            [-100]
+
+            # float with scientific notation
+            6.02e23
+            [6.02e+23]
+
+            # integer with scientific notation
+            1e-12
+            [1e-12]
+
+            Success
+            
+            # stray character
+            100Z
+               ^
+            FAIL: Expected end of text (at char 3), (line:1, col:4)
+
+            # missing leading digit before '.'
+            -.100
+            ^
+            FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)
+
+            # too many '.'
+            3.14.159
+                ^
+            FAIL: Expected end of text (at char 4), (line:1, col:5)
+
+            Success
+
+        Each test string must be on a single line. If you want to test a string that spans multiple
+        lines, create a test like this::
+
+            expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines")
+        
+        (Note that this is a raw string literal, you must include the leading 'r'.)
+        """
+        if isinstance(tests, basestring):
+            tests = list(map(str.strip, tests.rstrip().splitlines()))
+        if isinstance(comment, basestring):
+            comment = Literal(comment)
+        allResults = []
+        comments = []
+        success = True
+        for t in tests:
+            if comment is not None and comment.matches(t, False) or comments and not t:
+                comments.append(t)
+                continue
+            if not t:
+                continue
+            out = ['\n'.join(comments), t]
+            comments = []
+            try:
+                t = t.replace(r'\n','\n')
+                result = self.parseString(t, parseAll=parseAll)
+                out.append(result.dump(full=fullDump))
+                success = success and not failureTests
+            except ParseBaseException as pe:
+                fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else ""
+                if '\n' in t:
+                    out.append(line(pe.loc, t))
+                    out.append(' '*(col(pe.loc,t)-1) + '^' + fatal)
+                else:
+                    out.append(' '*pe.loc + '^' + fatal)
+                out.append("FAIL: " + str(pe))
+                success = success and failureTests
+                result = pe
+            except Exception as exc:
+                out.append("FAIL-EXCEPTION: " + str(exc))
+                success = success and failureTests
+                result = exc
+
+            if printResults:
+                if fullDump:
+                    out.append('')
+                print('\n'.join(out))
+
+            allResults.append((t, result))
+        
+        return success, allResults
+
+        
+class Token(ParserElement):
+    """
+    Abstract C{ParserElement} subclass, for defining atomic matching patterns.
+    """
+    def __init__( self ):
+        super(Token,self).__init__( savelist=False )
+
+
+class Empty(Token):
+    """
+    An empty token, will always match.
+    """
+    def __init__( self ):
+        super(Empty,self).__init__()
+        self.name = "Empty"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+
+class NoMatch(Token):
+    """
+    A token that will never match.
+    """
+    def __init__( self ):
+        super(NoMatch,self).__init__()
+        self.name = "NoMatch"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.errmsg = "Unmatchable token"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Literal(Token):
+    """
+    Token to exactly match a specified string.
+    
+    Example::
+        Literal('blah').parseString('blah')  # -> ['blah']
+        Literal('blah').parseString('blahfooblah')  # -> ['blah']
+        Literal('blah').parseString('bla')  # -> Exception: Expected "blah"
+    
+    For case-insensitive matching, use L{CaselessLiteral}.
+    
+    For keyword matching (force word break before and after the matched string),
+    use L{Keyword} or L{CaselessKeyword}.
+    """
+    def __init__( self, matchString ):
+        super(Literal,self).__init__()
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Literal; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+            self.__class__ = Empty
+        self.name = '"%s"' % _ustr(self.match)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+
+    # Performance tuning: this routine gets called a *lot*
+    # if this is a single character match string  and the first character matches,
+    # short-circuit as quickly as possible, and avoid calling startswith
+    #~ @profile
+    def parseImpl( self, instring, loc, doActions=True ):
+        if (instring[loc] == self.firstMatchChar and
+            (self.matchLen==1 or instring.startswith(self.match,loc)) ):
+            return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+_L = Literal
+ParserElement._literalStringClass = Literal
+
+class Keyword(Token):
+    """
+    Token to exactly match a specified string as a keyword, that is, it must be
+    immediately followed by a non-keyword character.  Compare with C{L{Literal}}:
+     - C{Literal("if")} will match the leading C{'if'} in C{'ifAndOnlyIf'}.
+     - C{Keyword("if")} will not; it will only match the leading C{'if'} in C{'if x=1'}, or C{'if(y==2)'}
+    Accepts two optional constructor arguments in addition to the keyword string:
+     - C{identChars} is a string of characters that would be valid identifier characters,
+          defaulting to all alphanumerics + "_" and "$"
+     - C{caseless} allows case-insensitive matching, default is C{False}.
+       
+    Example::
+        Keyword("start").parseString("start")  # -> ['start']
+        Keyword("start").parseString("starting")  # -> Exception
+
+    For case-insensitive matching, use L{CaselessKeyword}.
+    """
+    DEFAULT_KEYWORD_CHARS = alphanums+"_$"
+
+    def __init__( self, matchString, identChars=None, caseless=False ):
+        super(Keyword,self).__init__()
+        if identChars is None:
+            identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Keyword; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+        self.name = '"%s"' % self.match
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+        self.caseless = caseless
+        if caseless:
+            self.caselessmatch = matchString.upper()
+            identChars = identChars.upper()
+        self.identChars = set(identChars)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.caseless:
+            if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and
+                 (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) and
+                 (loc == 0 or instring[loc-1].upper() not in self.identChars) ):
+                return loc+self.matchLen, self.match
+        else:
+            if (instring[loc] == self.firstMatchChar and
+                (self.matchLen==1 or instring.startswith(self.match,loc)) and
+                (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen] not in self.identChars) and
+                (loc == 0 or instring[loc-1] not in self.identChars) ):
+                return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+    def copy(self):
+        c = super(Keyword,self).copy()
+        c.identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        return c
+
+    @staticmethod
+    def setDefaultKeywordChars( chars ):
+        """Overrides the default Keyword chars
+        """
+        Keyword.DEFAULT_KEYWORD_CHARS = chars
+
+class CaselessLiteral(Literal):
+    """
+    Token to match a specified string, ignoring case of letters.
+    Note: the matched results will always be in the case of the given
+    match string, NOT the case of the input text.
+
+    Example::
+        OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD']
+        
+    (Contrast with example for L{CaselessKeyword}.)
+    """
+    def __init__( self, matchString ):
+        super(CaselessLiteral,self).__init__( matchString.upper() )
+        # Preserve the defining literal.
+        self.returnString = matchString
+        self.name = "'%s'" % self.returnString
+        self.errmsg = "Expected " + self.name
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[ loc:loc+self.matchLen ].upper() == self.match:
+            return loc+self.matchLen, self.returnString
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class CaselessKeyword(Keyword):
+    """
+    Caseless version of L{Keyword}.
+
+    Example::
+        OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD']
+        
+    (Contrast with example for L{CaselessLiteral}.)
+    """
+    def __init__( self, matchString, identChars=None ):
+        super(CaselessKeyword,self).__init__( matchString, identChars, caseless=True )
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and
+             (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) ):
+            return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class CloseMatch(Token):
+    """
+    A variation on L{Literal} which matches "close" matches, that is, 
+    strings with at most 'n' mismatching characters. C{CloseMatch} takes parameters:
+     - C{match_string} - string to be matched
+     - C{maxMismatches} - (C{default=1}) maximum number of mismatches allowed to count as a match
+    
+    The results from a successful parse will contain the matched text from the input string and the following named results:
+     - C{mismatches} - a list of the positions within the match_string where mismatches were found
+     - C{original} - the original match_string used to compare against the input string
+    
+    If C{mismatches} is an empty list, then the match was an exact match.
+    
+    Example::
+        patt = CloseMatch("ATCATCGAATGGA")
+        patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})
+        patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)
+
+        # exact match
+        patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})
+
+        # close match allowing up to 2 mismatches
+        patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2)
+        patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})
+    """
+    def __init__(self, match_string, maxMismatches=1):
+        super(CloseMatch,self).__init__()
+        self.name = match_string
+        self.match_string = match_string
+        self.maxMismatches = maxMismatches
+        self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches)
+        self.mayIndexError = False
+        self.mayReturnEmpty = False
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        start = loc
+        instrlen = len(instring)
+        maxloc = start + len(self.match_string)
+
+        if maxloc <= instrlen:
+            match_string = self.match_string
+            match_stringloc = 0
+            mismatches = []
+            maxMismatches = self.maxMismatches
+
+            for match_stringloc,s_m in enumerate(zip(instring[loc:maxloc], self.match_string)):
+                src,mat = s_m
+                if src != mat:
+                    mismatches.append(match_stringloc)
+                    if len(mismatches) > maxMismatches:
+                        break
+            else:
+                loc = match_stringloc + 1
+                results = ParseResults([instring[start:loc]])
+                results['original'] = self.match_string
+                results['mismatches'] = mismatches
+                return loc, results
+
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Word(Token):
+    """
+    Token for matching words composed of allowed character sets.
+    Defined with string containing all allowed initial characters,
+    an optional string containing allowed body characters (if omitted,
+    defaults to the initial character set), and an optional minimum,
+    maximum, and/or exact length.  The default value for C{min} is 1 (a
+    minimum value < 1 is not valid); the default values for C{max} and C{exact}
+    are 0, meaning no maximum or exact length restriction. An optional
+    C{excludeChars} parameter can list characters that might be found in 
+    the input C{bodyChars} string; useful to define a word of all printables
+    except for one or two characters, for instance.
+    
+    L{srange} is useful for defining custom character set strings for defining 
+    C{Word} expressions, using range notation from regular expression character sets.
+    
+    A common mistake is to use C{Word} to match a specific literal string, as in 
+    C{Word("Address")}. Remember that C{Word} uses the string argument to define
+    I{sets} of matchable characters. This expression would match "Add", "AAA",
+    "dAred", or any other word made up of the characters 'A', 'd', 'r', 'e', and 's'.
+    To match an exact literal string, use L{Literal} or L{Keyword}.
+
+    pyparsing includes helper strings for building Words:
+     - L{alphas}
+     - L{nums}
+     - L{alphanums}
+     - L{hexnums}
+     - L{alphas8bit} (alphabetic characters in ASCII range 128-255 - accented, tilded, umlauted, etc.)
+     - L{punc8bit} (non-alphabetic characters in ASCII range 128-255 - currency, symbols, superscripts, diacriticals, etc.)
+     - L{printables} (any non-whitespace character)
+
+    Example::
+        # a word composed of digits
+        integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))
+        
+        # a word with a leading capital, and zero or more lowercase
+        capital_word = Word(alphas.upper(), alphas.lower())
+
+        # hostnames are alphanumeric, with leading alpha, and '-'
+        hostname = Word(alphas, alphanums+'-')
+        
+        # roman numeral (not a strict parser, accepts invalid mix of characters)
+        roman = Word("IVXLCDM")
+        
+        # any string of non-whitespace characters, except for ','
+        csv_value = Word(printables, excludeChars=",")
+    """
+    def __init__( self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None ):
+        super(Word,self).__init__()
+        if excludeChars:
+            initChars = ''.join(c for c in initChars if c not in excludeChars)
+            if bodyChars:
+                bodyChars = ''.join(c for c in bodyChars if c not in excludeChars)
+        self.initCharsOrig = initChars
+        self.initChars = set(initChars)
+        if bodyChars :
+            self.bodyCharsOrig = bodyChars
+            self.bodyChars = set(bodyChars)
+        else:
+            self.bodyCharsOrig = initChars
+            self.bodyChars = set(initChars)
+
+        self.maxSpecified = max > 0
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.asKeyword = asKeyword
+
+        if ' ' not in self.initCharsOrig+self.bodyCharsOrig and (min==1 and max==0 and exact==0):
+            if self.bodyCharsOrig == self.initCharsOrig:
+                self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig)
+            elif len(self.initCharsOrig) == 1:
+                self.reString = "%s[%s]*" % \
+                                      (re.escape(self.initCharsOrig),
+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
+            else:
+                self.reString = "[%s][%s]*" % \
+                                      (_escapeRegexRangeChars(self.initCharsOrig),
+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
+            if self.asKeyword:
+                self.reString = r"\b"+self.reString+r"\b"
+            try:
+                self.re = re.compile( self.reString )
+            except Exception:
+                self.re = None
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.re:
+            result = self.re.match(instring,loc)
+            if not result:
+                raise ParseException(instring, loc, self.errmsg, self)
+
+            loc = result.end()
+            return loc, result.group()
+
+        if not(instring[ loc ] in self.initChars):
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        instrlen = len(instring)
+        bodychars = self.bodyChars
+        maxloc = start + self.maxLen
+        maxloc = min( maxloc, instrlen )
+        while loc < maxloc and instring[loc] in bodychars:
+            loc += 1
+
+        throwException = False
+        if loc - start < self.minLen:
+            throwException = True
+        if self.maxSpecified and loc < instrlen and instring[loc] in bodychars:
+            throwException = True
+        if self.asKeyword:
+            if (start>0 and instring[start-1] in bodychars) or (loc<instrlen and instring[loc] in bodychars):
+                throwException = True
+
+        if throwException:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__( self ):
+        try:
+            return super(Word,self).__str__()
+        except Exception:
+            pass
+
+
+        if self.strRepr is None:
+
+            def charsAsStr(s):
+                if len(s)>4:
+                    return s[:4]+"..."
+                else:
+                    return s
+
+            if ( self.initCharsOrig != self.bodyCharsOrig ):
+                self.strRepr = "W:(%s,%s)" % ( charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig) )
+            else:
+                self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig)
+
+        return self.strRepr
+
+
+class Regex(Token):
+    r"""
+    Token for matching strings that match a given regular expression.
+    Defined with string specifying the regular expression in a form recognized by the inbuilt Python re module.
+    If the given regex contains named groups (defined using C{(?P<name>...)}), these will be preserved as 
+    named parse results.
+
+    Example::
+        realnum = Regex(r"[+-]?\d+\.\d*")
+        date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')
+        # ref: http://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression
+        roman = Regex(r"M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")
+    """
+    compiledREtype = type(re.compile("[A-Z]"))
+    def __init__( self, pattern, flags=0):
+        """The parameters C{pattern} and C{flags} are passed to the C{re.compile()} function as-is. See the Python C{re} module for an explanation of the acceptable patterns and flags."""
+        super(Regex,self).__init__()
+
+        if isinstance(pattern, basestring):
+            if not pattern:
+                warnings.warn("null string passed to Regex; use Empty() instead",
+                        SyntaxWarning, stacklevel=2)
+
+            self.pattern = pattern
+            self.flags = flags
+
+            try:
+                self.re = re.compile(self.pattern, self.flags)
+                self.reString = self.pattern
+            except sre_constants.error:
+                warnings.warn("invalid pattern (%s) passed to Regex" % pattern,
+                    SyntaxWarning, stacklevel=2)
+                raise
+
+        elif isinstance(pattern, Regex.compiledREtype):
+            self.re = pattern
+            self.pattern = \
+            self.reString = str(pattern)
+            self.flags = flags
+            
+        else:
+            raise ValueError("Regex may only be constructed with a string or a compiled RE object")
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        result = self.re.match(instring,loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        d = result.groupdict()
+        ret = ParseResults(result.group())
+        if d:
+            for k in d:
+                ret[k] = d[k]
+        return loc,ret
+
+    def __str__( self ):
+        try:
+            return super(Regex,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "Re:(%s)" % repr(self.pattern)
+
+        return self.strRepr
+
+
+class QuotedString(Token):
+    r"""
+    Token for matching strings that are delimited by quoting characters.
+    
+    Defined with the following parameters:
+        - quoteChar - string of one or more characters defining the quote delimiting string
+        - escChar - character to escape quotes, typically backslash (default=C{None})
+        - escQuote - special quote sequence to escape an embedded quote string (such as SQL's "" to escape an embedded ") (default=C{None})
+        - multiline - boolean indicating whether quotes can span multiple lines (default=C{False})
+        - unquoteResults - boolean indicating whether the matched text should be unquoted (default=C{True})
+        - endQuoteChar - string of one or more characters defining the end of the quote delimited string (default=C{None} => same as quoteChar)
+        - convertWhitespaceEscapes - convert escaped whitespace (C{'\t'}, C{'\n'}, etc.) to actual whitespace (default=C{True})
+
+    Example::
+        qs = QuotedString('"')
+        print(qs.searchString('lsjdf "This is the quote" sldjf'))
+        complex_qs = QuotedString('{{', endQuoteChar='}}')
+        print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf'))
+        sql_qs = QuotedString('"', escQuote='""')
+        print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))
+    prints::
+        [['This is the quote']]
+        [['This is the "quote"']]
+        [['This is the quote with "embedded" quotes']]
+    """
+    def __init__( self, quoteChar, escChar=None, escQuote=None, multiline=False, unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True):
+        super(QuotedString,self).__init__()
+
+        # remove white space from quote chars - wont work anyway
+        quoteChar = quoteChar.strip()
+        if not quoteChar:
+            warnings.warn("quoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
+            raise SyntaxError()
+
+        if endQuoteChar is None:
+            endQuoteChar = quoteChar
+        else:
+            endQuoteChar = endQuoteChar.strip()
+            if not endQuoteChar:
+                warnings.warn("endQuoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
+                raise SyntaxError()
+
+        self.quoteChar = quoteChar
+        self.quoteCharLen = len(quoteChar)
+        self.firstQuoteChar = quoteChar[0]
+        self.endQuoteChar = endQuoteChar
+        self.endQuoteCharLen = len(endQuoteChar)
+        self.escChar = escChar
+        self.escQuote = escQuote
+        self.unquoteResults = unquoteResults
+        self.convertWhitespaceEscapes = convertWhitespaceEscapes
+
+        if multiline:
+            self.flags = re.MULTILINE | re.DOTALL
+            self.pattern = r'%s(?:[^%s%s]' % \
+                ( re.escape(self.quoteChar),
+                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
+        else:
+            self.flags = 0
+            self.pattern = r'%s(?:[^%s\n\r%s]' % \
+                ( re.escape(self.quoteChar),
+                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
+        if len(self.endQuoteChar) > 1:
+            self.pattern += (
+                '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]),
+                                               _escapeRegexRangeChars(self.endQuoteChar[i]))
+                                    for i in range(len(self.endQuoteChar)-1,0,-1)) + ')'
+                )
+        if escQuote:
+            self.pattern += (r'|(?:%s)' % re.escape(escQuote))
+        if escChar:
+            self.pattern += (r'|(?:%s.)' % re.escape(escChar))
+            self.escCharReplacePattern = re.escape(self.escChar)+"(.)"
+        self.pattern += (r')*%s' % re.escape(self.endQuoteChar))
+
+        try:
+            self.re = re.compile(self.pattern, self.flags)
+            self.reString = self.pattern
+        except sre_constants.error:
+            warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern,
+                SyntaxWarning, stacklevel=2)
+            raise
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        result = instring[loc] == self.firstQuoteChar and self.re.match(instring,loc) or None
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result.group()
+
+        if self.unquoteResults:
+
+            # strip off quotes
+            ret = ret[self.quoteCharLen:-self.endQuoteCharLen]
+
+            if isinstance(ret,basestring):
+                # replace escaped whitespace
+                if '\\' in ret and self.convertWhitespaceEscapes:
+                    ws_map = {
+                        r'\t' : '\t',
+                        r'\n' : '\n',
+                        r'\f' : '\f',
+                        r'\r' : '\r',
+                    }
+                    for wslit,wschar in ws_map.items():
+                        ret = ret.replace(wslit, wschar)
+
+                # replace escaped characters
+                if self.escChar:
+                    ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret)
+
+                # replace escaped quotes
+                if self.escQuote:
+                    ret = ret.replace(self.escQuote, self.endQuoteChar)
+
+        return loc, ret
+
+    def __str__( self ):
+        try:
+            return super(QuotedString,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar)
+
+        return self.strRepr
+
+
+class CharsNotIn(Token):
+    """
+    Token for matching words composed of characters I{not} in a given set (will
+    include whitespace in matched characters if not listed in the provided exclusion set - see example).
+    Defined with string containing all disallowed characters, and an optional
+    minimum, maximum, and/or exact length.  The default value for C{min} is 1 (a
+    minimum value < 1 is not valid); the default values for C{max} and C{exact}
+    are 0, meaning no maximum or exact length restriction.
+
+    Example::
+        # define a comma-separated-value as anything that is not a ','
+        csv_value = CharsNotIn(',')
+        print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213"))
+    prints::
+        ['dkls', 'lsdkjf', 's12 34', '@!#', '213']
+    """
+    def __init__( self, notChars, min=1, max=0, exact=0 ):
+        super(CharsNotIn,self).__init__()
+        self.skipWhitespace = False
+        self.notChars = notChars
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use Optional(CharsNotIn()) if zero-length char group is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = ( self.minLen == 0 )
+        self.mayIndexError = False
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[loc] in self.notChars:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        notchars = self.notChars
+        maxlen = min( start+self.maxLen, len(instring) )
+        while loc < maxlen and \
+              (instring[loc] not in notchars):
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__( self ):
+        try:
+            return super(CharsNotIn, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            if len(self.notChars) > 4:
+                self.strRepr = "!W:(%s...)" % self.notChars[:4]
+            else:
+                self.strRepr = "!W:(%s)" % self.notChars
+
+        return self.strRepr
+
+class White(Token):
+    """
+    Special matching class for matching whitespace.  Normally, whitespace is ignored
+    by pyparsing grammars.  This class is included when some whitespace structures
+    are significant.  Define with a string containing the whitespace characters to be
+    matched; default is C{" \\t\\r\\n"}.  Also takes optional C{min}, C{max}, and C{exact} arguments,
+    as defined for the C{L{Word}} class.
+    """
+    whiteStrs = {
+        " " : "<SPC>",
+        "\t": "<TAB>",
+        "\n": "<LF>",
+        "\r": "<CR>",
+        "\f": "<FF>",
+        }
+    def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0):
+        super(White,self).__init__()
+        self.matchWhite = ws
+        self.setWhitespaceChars( "".join(c for c in self.whiteChars if c not in self.matchWhite) )
+        #~ self.leaveWhitespace()
+        self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite))
+        self.mayReturnEmpty = True
+        self.errmsg = "Expected " + self.name
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if not(instring[ loc ] in self.matchWhite):
+            raise ParseException(instring, loc, self.errmsg, self)
+        start = loc
+        loc += 1
+        maxloc = start + self.maxLen
+        maxloc = min( maxloc, len(instring) )
+        while loc < maxloc and instring[loc] in self.matchWhite:
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+
+class _PositionToken(Token):
+    def __init__( self ):
+        super(_PositionToken,self).__init__()
+        self.name=self.__class__.__name__
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+class GoToColumn(_PositionToken):
+    """
+    Token to advance to a specific column of input text; useful for tabular report scraping.
+    """
+    def __init__( self, colno ):
+        super(GoToColumn,self).__init__()
+        self.col = colno
+
+    def preParse( self, instring, loc ):
+        if col(loc,instring) != self.col:
+            instrlen = len(instring)
+            if self.ignoreExprs:
+                loc = self._skipIgnorables( instring, loc )
+            while loc < instrlen and instring[loc].isspace() and col( loc, instring ) != self.col :
+                loc += 1
+        return loc
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        thiscol = col( loc, instring )
+        if thiscol > self.col:
+            raise ParseException( instring, loc, "Text not in expected column", self )
+        newloc = loc + self.col - thiscol
+        ret = instring[ loc: newloc ]
+        return newloc, ret
+
+
+class LineStart(_PositionToken):
+    """
+    Matches if current position is at the beginning of a line within the parse string
+    
+    Example::
+    
+        test = '''\
+        AAA this line
+        AAA and this line
+          AAA but not this one
+        B AAA and definitely not this one
+        '''
+
+        for t in (LineStart() + 'AAA' + restOfLine).searchString(test):
+            print(t)
+    
+    Prints::
+        ['AAA', ' this line']
+        ['AAA', ' and this line']    
+
+    """
+    def __init__( self ):
+        super(LineStart,self).__init__()
+        self.errmsg = "Expected start of line"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if col(loc, instring) == 1:
+            return loc, []
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class LineEnd(_PositionToken):
+    """
+    Matches if current position is at the end of a line within the parse string
+    """
+    def __init__( self ):
+        super(LineEnd,self).__init__()
+        self.setWhitespaceChars( ParserElement.DEFAULT_WHITE_CHARS.replace("\n","") )
+        self.errmsg = "Expected end of line"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc<len(instring):
+            if instring[loc] == "\n":
+                return loc+1, "\n"
+            else:
+                raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc+1, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class StringStart(_PositionToken):
+    """
+    Matches if current position is at the beginning of the parse string
+    """
+    def __init__( self ):
+        super(StringStart,self).__init__()
+        self.errmsg = "Expected start of text"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc != 0:
+            # see if entire string up to here is just whitespace and ignoreables
+            if loc != self.preParse( instring, 0 ):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class StringEnd(_PositionToken):
+    """
+    Matches if current position is at the end of the parse string
+    """
+    def __init__( self ):
+        super(StringEnd,self).__init__()
+        self.errmsg = "Expected end of text"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc < len(instring):
+            raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc+1, []
+        elif loc > len(instring):
+            return loc, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class WordStart(_PositionToken):
+    """
+    Matches if the current position is at the beginning of a Word, and
+    is not preceded by any character in a given set of C{wordChars}
+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,
+    use C{WordStart(alphanums)}. C{WordStart} will also match at the beginning of
+    the string being parsed, or at the beginning of a line.
+    """
+    def __init__(self, wordChars = printables):
+        super(WordStart,self).__init__()
+        self.wordChars = set(wordChars)
+        self.errmsg = "Not at the start of a word"
+
+    def parseImpl(self, instring, loc, doActions=True ):
+        if loc != 0:
+            if (instring[loc-1] in self.wordChars or
+                instring[loc] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class WordEnd(_PositionToken):
+    """
+    Matches if the current position is at the end of a Word, and
+    is not followed by any character in a given set of C{wordChars}
+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,
+    use C{WordEnd(alphanums)}. C{WordEnd} will also match at the end of
+    the string being parsed, or at the end of a line.
+    """
+    def __init__(self, wordChars = printables):
+        super(WordEnd,self).__init__()
+        self.wordChars = set(wordChars)
+        self.skipWhitespace = False
+        self.errmsg = "Not at the end of a word"
+
+    def parseImpl(self, instring, loc, doActions=True ):
+        instrlen = len(instring)
+        if instrlen>0 and loc<instrlen:
+            if (instring[loc] in self.wordChars or
+                instring[loc-1] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+
+class ParseExpression(ParserElement):
+    """
+    Abstract subclass of ParserElement, for combining and post-processing parsed tokens.
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(ParseExpression,self).__init__(savelist)
+        if isinstance( exprs, _generatorType ):
+            exprs = list(exprs)
+
+        if isinstance( exprs, basestring ):
+            self.exprs = [ ParserElement._literalStringClass( exprs ) ]
+        elif isinstance( exprs, Iterable ):
+            exprs = list(exprs)
+            # if sequence of strings provided, wrap with Literal
+            if all(isinstance(expr, basestring) for expr in exprs):
+                exprs = map(ParserElement._literalStringClass, exprs)
+            self.exprs = list(exprs)
+        else:
+            try:
+                self.exprs = list( exprs )
+            except TypeError:
+                self.exprs = [ exprs ]
+        self.callPreparse = False
+
+    def __getitem__( self, i ):
+        return self.exprs[i]
+
+    def append( self, other ):
+        self.exprs.append( other )
+        self.strRepr = None
+        return self
+
+    def leaveWhitespace( self ):
+        """Extends C{leaveWhitespace} defined in base class, and also invokes C{leaveWhitespace} on
+           all contained expressions."""
+        self.skipWhitespace = False
+        self.exprs = [ e.copy() for e in self.exprs ]
+        for e in self.exprs:
+            e.leaveWhitespace()
+        return self
+
+    def ignore( self, other ):
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                super( ParseExpression, self).ignore( other )
+                for e in self.exprs:
+                    e.ignore( self.ignoreExprs[-1] )
+        else:
+            super( ParseExpression, self).ignore( other )
+            for e in self.exprs:
+                e.ignore( self.ignoreExprs[-1] )
+        return self
+
+    def __str__( self ):
+        try:
+            return super(ParseExpression,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.exprs) )
+        return self.strRepr
+
+    def streamline( self ):
+        super(ParseExpression,self).streamline()
+
+        for e in self.exprs:
+            e.streamline()
+
+        # collapse nested And's of the form And( And( And( a,b), c), d) to And( a,b,c,d )
+        # but only if there are no parse actions or resultsNames on the nested And's
+        # (likewise for Or's and MatchFirst's)
+        if ( len(self.exprs) == 2 ):
+            other = self.exprs[0]
+            if ( isinstance( other, self.__class__ ) and
+                  not(other.parseAction) and
+                  other.resultsName is None and
+                  not other.debug ):
+                self.exprs = other.exprs[:] + [ self.exprs[1] ]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+            other = self.exprs[-1]
+            if ( isinstance( other, self.__class__ ) and
+                  not(other.parseAction) and
+                  other.resultsName is None and
+                  not other.debug ):
+                self.exprs = self.exprs[:-1] + other.exprs[:]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+        self.errmsg = "Expected " + _ustr(self)
+        
+        return self
+
+    def setResultsName( self, name, listAllMatches=False ):
+        ret = super(ParseExpression,self).setResultsName(name,listAllMatches)
+        return ret
+
+    def validate( self, validateTrace=[] ):
+        tmp = validateTrace[:]+[self]
+        for e in self.exprs:
+            e.validate(tmp)
+        self.checkRecursion( [] )
+        
+    def copy(self):
+        ret = super(ParseExpression,self).copy()
+        ret.exprs = [e.copy() for e in self.exprs]
+        return ret
+
+class And(ParseExpression):
+    """
+    Requires all given C{ParseExpression}s to be found in the given order.
+    Expressions may be separated by whitespace.
+    May be constructed using the C{'+'} operator.
+    May also be constructed using the C{'-'} operator, which will suppress backtracking.
+
+    Example::
+        integer = Word(nums)
+        name_expr = OneOrMore(Word(alphas))
+
+        expr = And([integer("id"),name_expr("name"),integer("age")])
+        # more easily written as:
+        expr = integer("id") + name_expr("name") + integer("age")
+    """
+
+    class _ErrorStop(Empty):
+        def __init__(self, *args, **kwargs):
+            super(And._ErrorStop,self).__init__(*args, **kwargs)
+            self.name = '-'
+            self.leaveWhitespace()
+
+    def __init__( self, exprs, savelist = True ):
+        super(And,self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.setWhitespaceChars( self.exprs[0].whiteChars )
+        self.skipWhitespace = self.exprs[0].skipWhitespace
+        self.callPreparse = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        # pass False as last arg to _parse for first element, since we already
+        # pre-parsed the string as part of our And pre-parsing
+        loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )
+        errorStop = False
+        for e in self.exprs[1:]:
+            if isinstance(e, And._ErrorStop):
+                errorStop = True
+                continue
+            if errorStop:
+                try:
+                    loc, exprtokens = e._parse( instring, loc, doActions )
+                except ParseSyntaxException:
+                    raise
+                except ParseBaseException as pe:
+                    pe.__traceback__ = None
+                    raise ParseSyntaxException._from_exception(pe)
+                except IndexError:
+                    raise ParseSyntaxException(instring, len(instring), self.errmsg, self)
+            else:
+                loc, exprtokens = e._parse( instring, loc, doActions )
+            if exprtokens or exprtokens.haskeys():
+                resultlist += exprtokens
+        return loc, resultlist
+
+    def __iadd__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #And( [ self, other ] )
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+            if not e.mayReturnEmpty:
+                break
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+
+class Or(ParseExpression):
+    """
+    Requires that at least one C{ParseExpression} is found.
+    If two expressions match, the expression that matches the longest string will be used.
+    May be constructed using the C{'^'} operator.
+
+    Example::
+        # construct Or using '^' operator
+        
+        number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789"))
+    prints::
+        [['123'], ['3.1416'], ['789']]
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(Or,self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        maxExcLoc = -1
+        maxException = None
+        matches = []
+        for e in self.exprs:
+            try:
+                loc2 = e.tryParse( instring, loc )
+            except ParseException as err:
+                err.__traceback__ = None
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring,len(instring),e.errmsg,self)
+                    maxExcLoc = len(instring)
+            else:
+                # save match among all matches, to retry longest to shortest
+                matches.append((loc2, e))
+
+        if matches:
+            matches.sort(key=lambda x: -x[0])
+            for _,e in matches:
+                try:
+                    return e._parse( instring, loc, doActions )
+                except ParseException as err:
+                    err.__traceback__ = None
+                    if err.loc > maxExcLoc:
+                        maxException = err
+                        maxExcLoc = err.loc
+
+        if maxException is not None:
+            maxException.msg = self.errmsg
+            raise maxException
+        else:
+            raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+
+    def __ixor__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #Or( [ self, other ] )
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class MatchFirst(ParseExpression):
+    """
+    Requires that at least one C{ParseExpression} is found.
+    If two expressions match, the first one listed is the one that will match.
+    May be constructed using the C{'|'} operator.
+
+    Example::
+        # construct MatchFirst using '|' operator
+        
+        # watch the order of expressions to match
+        number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]
+
+        # put more selective expression first
+        number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)
+        print(number.searchString("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(MatchFirst,self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        maxExcLoc = -1
+        maxException = None
+        for e in self.exprs:
+            try:
+                ret = e._parse( instring, loc, doActions )
+                return ret
+            except ParseException as err:
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring,len(instring),e.errmsg,self)
+                    maxExcLoc = len(instring)
+
+        # only got here if no expression matched, raise exception for match that made it the furthest
+        else:
+            if maxException is not None:
+                maxException.msg = self.errmsg
+                raise maxException
+            else:
+                raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+    def __ior__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #MatchFirst( [ self, other ] )
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class Each(ParseExpression):
+    """
+    Requires all given C{ParseExpression}s to be found, but in any order.
+    Expressions may be separated by whitespace.
+    May be constructed using the C{'&'} operator.
+
+    Example::
+        color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")
+        shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")
+        integer = Word(nums)
+        shape_attr = "shape:" + shape_type("shape")
+        posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")
+        color_attr = "color:" + color("color")
+        size_attr = "size:" + integer("size")
+
+        # use Each (using operator '&') to accept attributes in any order 
+        # (shape and posn are required, color and size are optional)
+        shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr)
+
+        shape_spec.runTests('''
+            shape: SQUARE color: BLACK posn: 100, 120
+            shape: CIRCLE size: 50 color: BLUE posn: 50,80
+            color:GREEN size:20 shape:TRIANGLE posn:20,40
+            '''
+            )
+    prints::
+        shape: SQUARE color: BLACK posn: 100, 120
+        ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]
+        - color: BLACK
+        - posn: ['100', ',', '120']
+          - x: 100
+          - y: 120
+        - shape: SQUARE
+
+
+        shape: CIRCLE size: 50 color: BLUE posn: 50,80
+        ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]
+        - color: BLUE
+        - posn: ['50', ',', '80']
+          - x: 50
+          - y: 80
+        - shape: CIRCLE
+        - size: 50
+
+
+        color: GREEN size: 20 shape: TRIANGLE posn: 20,40
+        ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]
+        - color: GREEN
+        - posn: ['20', ',', '40']
+          - x: 20
+          - y: 40
+        - shape: TRIANGLE
+        - size: 20
+    """
+    def __init__( self, exprs, savelist = True ):
+        super(Each,self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.skipWhitespace = True
+        self.initExprGroups = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.initExprGroups:
+            self.opt1map = dict((id(e.expr),e) for e in self.exprs if isinstance(e,Optional))
+            opt1 = [ e.expr for e in self.exprs if isinstance(e,Optional) ]
+            opt2 = [ e for e in self.exprs if e.mayReturnEmpty and not isinstance(e,Optional)]
+            self.optionals = opt1 + opt2
+            self.multioptionals = [ e.expr for e in self.exprs if isinstance(e,ZeroOrMore) ]
+            self.multirequired = [ e.expr for e in self.exprs if isinstance(e,OneOrMore) ]
+            self.required = [ e for e in self.exprs if not isinstance(e,(Optional,ZeroOrMore,OneOrMore)) ]
+            self.required += self.multirequired
+            self.initExprGroups = False
+        tmpLoc = loc
+        tmpReqd = self.required[:]
+        tmpOpt  = self.optionals[:]
+        matchOrder = []
+
+        keepMatching = True
+        while keepMatching:
+            tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired
+            failed = []
+            for e in tmpExprs:
+                try:
+                    tmpLoc = e.tryParse( instring, tmpLoc )
+                except ParseException:
+                    failed.append(e)
+                else:
+                    matchOrder.append(self.opt1map.get(id(e),e))
+                    if e in tmpReqd:
+                        tmpReqd.remove(e)
+                    elif e in tmpOpt:
+                        tmpOpt.remove(e)
+            if len(failed) == len(tmpExprs):
+                keepMatching = False
+
+        if tmpReqd:
+            missing = ", ".join(_ustr(e) for e in tmpReqd)
+            raise ParseException(instring,loc,"Missing one or more required elements (%s)" % missing )
+
+        # add any unmatched Optionals, in case they have default values defined
+        matchOrder += [e for e in self.exprs if isinstance(e,Optional) and e.expr in tmpOpt]
+
+        resultlist = []
+        for e in matchOrder:
+            loc,results = e._parse(instring,loc,doActions)
+            resultlist.append(results)
+
+        finalResults = sum(resultlist, ParseResults([]))
+        return loc, finalResults
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class ParseElementEnhance(ParserElement):
+    """
+    Abstract subclass of C{ParserElement}, for combining and post-processing parsed tokens.
+    """
+    def __init__( self, expr, savelist=False ):
+        super(ParseElementEnhance,self).__init__(savelist)
+        if isinstance( expr, basestring ):
+            if issubclass(ParserElement._literalStringClass, Token):
+                expr = ParserElement._literalStringClass(expr)
+            else:
+                expr = ParserElement._literalStringClass(Literal(expr))
+        self.expr = expr
+        self.strRepr = None
+        if expr is not None:
+            self.mayIndexError = expr.mayIndexError
+            self.mayReturnEmpty = expr.mayReturnEmpty
+            self.setWhitespaceChars( expr.whiteChars )
+            self.skipWhitespace = expr.skipWhitespace
+            self.saveAsList = expr.saveAsList
+            self.callPreparse = expr.callPreparse
+            self.ignoreExprs.extend(expr.ignoreExprs)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.expr is not None:
+            return self.expr._parse( instring, loc, doActions, callPreParse=False )
+        else:
+            raise ParseException("",loc,self.errmsg,self)
+
+    def leaveWhitespace( self ):
+        self.skipWhitespace = False
+        self.expr = self.expr.copy()
+        if self.expr is not None:
+            self.expr.leaveWhitespace()
+        return self
+
+    def ignore( self, other ):
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                super( ParseElementEnhance, self).ignore( other )
+                if self.expr is not None:
+                    self.expr.ignore( self.ignoreExprs[-1] )
+        else:
+            super( ParseElementEnhance, self).ignore( other )
+            if self.expr is not None:
+                self.expr.ignore( self.ignoreExprs[-1] )
+        return self
+
+    def streamline( self ):
+        super(ParseElementEnhance,self).streamline()
+        if self.expr is not None:
+            self.expr.streamline()
+        return self
+
+    def checkRecursion( self, parseElementList ):
+        if self in parseElementList:
+            raise RecursiveGrammarException( parseElementList+[self] )
+        subRecCheckList = parseElementList[:] + [ self ]
+        if self.expr is not None:
+            self.expr.checkRecursion( subRecCheckList )
+
+    def validate( self, validateTrace=[] ):
+        tmp = validateTrace[:]+[self]
+        if self.expr is not None:
+            self.expr.validate(tmp)
+        self.checkRecursion( [] )
+
+    def __str__( self ):
+        try:
+            return super(ParseElementEnhance,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None and self.expr is not None:
+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.expr) )
+        return self.strRepr
+
+
+class FollowedBy(ParseElementEnhance):
+    """
+    Lookahead matching of the given parse expression.  C{FollowedBy}
+    does I{not} advance the parsing position within the input string, it only
+    verifies that the specified parse expression matches at the current
+    position.  C{FollowedBy} always returns a null token list.
+
+    Example::
+        # use FollowedBy to match a label only if it is followed by a ':'
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        
+        OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint()
+    prints::
+        [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]
+    """
+    def __init__( self, expr ):
+        super(FollowedBy,self).__init__(expr)
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        self.expr.tryParse( instring, loc )
+        return loc, []
+
+
+class NotAny(ParseElementEnhance):
+    """
+    Lookahead to disallow matching with the given parse expression.  C{NotAny}
+    does I{not} advance the parsing position within the input string, it only
+    verifies that the specified parse expression does I{not} match at the current
+    position.  Also, C{NotAny} does I{not} skip over leading whitespace. C{NotAny}
+    always returns a null token list.  May be constructed using the '~' operator.
+
+    Example::
+        
+    """
+    def __init__( self, expr ):
+        super(NotAny,self).__init__(expr)
+        #~ self.leaveWhitespace()
+        self.skipWhitespace = False  # do NOT use self.leaveWhitespace(), don't want to propagate to exprs
+        self.mayReturnEmpty = True
+        self.errmsg = "Found unwanted token, "+_ustr(self.expr)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.expr.canParseNext(instring, loc):
+            raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "~{" + _ustr(self.expr) + "}"
+
+        return self.strRepr
+
+class _MultipleMatch(ParseElementEnhance):
+    def __init__( self, expr, stopOn=None):
+        super(_MultipleMatch, self).__init__(expr)
+        self.saveAsList = True
+        ender = stopOn
+        if isinstance(ender, basestring):
+            ender = ParserElement._literalStringClass(ender)
+        self.not_ender = ~ender if ender is not None else None
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        self_expr_parse = self.expr._parse
+        self_skip_ignorables = self._skipIgnorables
+        check_ender = self.not_ender is not None
+        if check_ender:
+            try_not_ender = self.not_ender.tryParse
+        
+        # must be at least one (but first see if we are the stopOn sentinel;
+        # if so, fail)
+        if check_ender:
+            try_not_ender(instring, loc)
+        loc, tokens = self_expr_parse( instring, loc, doActions, callPreParse=False )
+        try:
+            hasIgnoreExprs = (not not self.ignoreExprs)
+            while 1:
+                if check_ender:
+                    try_not_ender(instring, loc)
+                if hasIgnoreExprs:
+                    preloc = self_skip_ignorables( instring, loc )
+                else:
+                    preloc = loc
+                loc, tmptokens = self_expr_parse( instring, preloc, doActions )
+                if tmptokens or tmptokens.haskeys():
+                    tokens += tmptokens
+        except (ParseException,IndexError):
+            pass
+
+        return loc, tokens
+        
+class OneOrMore(_MultipleMatch):
+    """
+    Repetition of one or more of the given expression.
+    
+    Parameters:
+     - expr - expression that must match one or more times
+     - stopOn - (default=C{None}) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition 
+          expression)          
+
+    Example::
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: BLACK"
+        OneOrMore(attr_expr).parseString(text).pprint()  # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]
+
+        # use stopOn attribute for OneOrMore to avoid reading label string as part of the data
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]
+        
+        # could also be written as
+        (attr_expr * (1,)).parseString(text).pprint()
+    """
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + _ustr(self.expr) + "}..."
+
+        return self.strRepr
+
+class ZeroOrMore(_MultipleMatch):
+    """
+    Optional repetition of zero or more of the given expression.
+    
+    Parameters:
+     - expr - expression that must match zero or more times
+     - stopOn - (default=C{None}) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition 
+          expression)          
+
+    Example: similar to L{OneOrMore}
+    """
+    def __init__( self, expr, stopOn=None):
+        super(ZeroOrMore,self).__init__(expr, stopOn=stopOn)
+        self.mayReturnEmpty = True
+        
+    def parseImpl( self, instring, loc, doActions=True ):
+        try:
+            return super(ZeroOrMore, self).parseImpl(instring, loc, doActions)
+        except (ParseException,IndexError):
+            return loc, []
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]..."
+
+        return self.strRepr
+
+class _NullToken(object):
+    def __bool__(self):
+        return False
+    __nonzero__ = __bool__
+    def __str__(self):
+        return ""
+
+_optionalNotMatched = _NullToken()
+class Optional(ParseElementEnhance):
+    """
+    Optional matching of the given expression.
+
+    Parameters:
+     - expr - expression that must match zero or more times
+     - default (optional) - value to be returned if the optional expression is not found.
+
+    Example::
+        # US postal code can be a 5-digit zip, plus optional 4-digit qualifier
+        zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4)))
+        zip.runTests('''
+            # traditional ZIP code
+            12345
+            
+            # ZIP+4 form
+            12101-0001
+            
+            # invalid ZIP
+            98765-
+            ''')
+    prints::
+        # traditional ZIP code
+        12345
+        ['12345']
+
+        # ZIP+4 form
+        12101-0001
+        ['12101-0001']
+
+        # invalid ZIP
+        98765-
+             ^
+        FAIL: Expected end of text (at char 5), (line:1, col:6)
+    """
+    def __init__( self, expr, default=_optionalNotMatched ):
+        super(Optional,self).__init__( expr, savelist=False )
+        self.saveAsList = self.expr.saveAsList
+        self.defaultValue = default
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        try:
+            loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False )
+        except (ParseException,IndexError):
+            if self.defaultValue is not _optionalNotMatched:
+                if self.expr.resultsName:
+                    tokens = ParseResults([ self.defaultValue ])
+                    tokens[self.expr.resultsName] = self.defaultValue
+                else:
+                    tokens = [ self.defaultValue ]
+            else:
+                tokens = []
+        return loc, tokens
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]"
+
+        return self.strRepr
+
+class SkipTo(ParseElementEnhance):
+    """
+    Token for skipping over all undefined text until the matched expression is found.
+
+    Parameters:
+     - expr - target expression marking the end of the data to be skipped
+     - include - (default=C{False}) if True, the target expression is also parsed 
+          (the skipped text and target expression are returned as a 2-element list).
+     - ignore - (default=C{None}) used to define grammars (typically quoted strings and 
+          comments) that might contain false matches to the target expression
+     - failOn - (default=C{None}) define expressions that are not allowed to be 
+          included in the skipped test; if found before the target expression is found, 
+          the SkipTo is not a match
+
+    Example::
+        report = '''
+            Outstanding Issues Report - 1 Jan 2000
+
+               # | Severity | Description                               |  Days Open
+            -----+----------+-------------------------------------------+-----------
+             101 | Critical | Intermittent system crash                 |          6
+              94 | Cosmetic | Spelling error on Login ('log|n')         |         14
+              79 | Minor    | System slow when running too many reports |         47
+            '''
+        integer = Word(nums)
+        SEP = Suppress('|')
+        # use SkipTo to simply match everything up until the next SEP
+        # - ignore quoted strings, so that a '|' character inside a quoted string does not match
+        # - parse action will call token.strip() for each matched token, i.e., the description body
+        string_data = SkipTo(SEP, ignore=quotedString)
+        string_data.setParseAction(tokenMap(str.strip))
+        ticket_expr = (integer("issue_num") + SEP 
+                      + string_data("sev") + SEP 
+                      + string_data("desc") + SEP 
+                      + integer("days_open"))
+        
+        for tkt in ticket_expr.searchString(report):
+            print tkt.dump()
+    prints::
+        ['101', 'Critical', 'Intermittent system crash', '6']
+        - days_open: 6
+        - desc: Intermittent system crash
+        - issue_num: 101
+        - sev: Critical
+        ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']
+        - days_open: 14
+        - desc: Spelling error on Login ('log|n')
+        - issue_num: 94
+        - sev: Cosmetic
+        ['79', 'Minor', 'System slow when running too many reports', '47']
+        - days_open: 47
+        - desc: System slow when running too many reports
+        - issue_num: 79
+        - sev: Minor
+    """
+    def __init__( self, other, include=False, ignore=None, failOn=None ):
+        super( SkipTo, self ).__init__( other )
+        self.ignoreExpr = ignore
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.includeMatch = include
+        self.asList = False
+        if isinstance(failOn, basestring):
+            self.failOn = ParserElement._literalStringClass(failOn)
+        else:
+            self.failOn = failOn
+        self.errmsg = "No match found for "+_ustr(self.expr)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        startloc = loc
+        instrlen = len(instring)
+        expr = self.expr
+        expr_parse = self.expr._parse
+        self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None
+        self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None
+        
+        tmploc = loc
+        while tmploc <= instrlen:
+            if self_failOn_canParseNext is not None:
+                # break if failOn expression matches
+                if self_failOn_canParseNext(instring, tmploc):
+                    break
+                    
+            if self_ignoreExpr_tryParse is not None:
+                # advance past ignore expressions
+                while 1:
+                    try:
+                        tmploc = self_ignoreExpr_tryParse(instring, tmploc)
+                    except ParseBaseException:
+                        break
+            
+            try:
+                expr_parse(instring, tmploc, doActions=False, callPreParse=False)
+            except (ParseException, IndexError):
+                # no match, advance loc in string
+                tmploc += 1
+            else:
+                # matched skipto expr, done
+                break
+
+        else:
+            # ran off the end of the input string without matching skipto expr, fail
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        # build up return values
+        loc = tmploc
+        skiptext = instring[startloc:loc]
+        skipresult = ParseResults(skiptext)
+        
+        if self.includeMatch:
+            loc, mat = expr_parse(instring,loc,doActions,callPreParse=False)
+            skipresult += mat
+
+        return loc, skipresult
+
+class Forward(ParseElementEnhance):
+    """
+    Forward declaration of an expression to be defined later -
+    used for recursive grammars, such as algebraic infix notation.
+    When the expression is known, it is assigned to the C{Forward} variable using the '<<' operator.
+
+    Note: take care when assigning to C{Forward} not to overlook precedence of operators.
+    Specifically, '|' has a lower precedence than '<<', so that::
+        fwdExpr << a | b | c
+    will actually be evaluated as::
+        (fwdExpr << a) | b | c
+    thereby leaving b and c out as parseable alternatives.  It is recommended that you
+    explicitly group the values inserted into the C{Forward}::
+        fwdExpr << (a | b | c)
+    Converting to use the '<<=' operator instead will avoid this problem.
+
+    See L{ParseResults.pprint} for an example of a recursive parser created using
+    C{Forward}.
+    """
+    def __init__( self, other=None ):
+        super(Forward,self).__init__( other, savelist=False )
+
+    def __lshift__( self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass(other)
+        self.expr = other
+        self.strRepr = None
+        self.mayIndexError = self.expr.mayIndexError
+        self.mayReturnEmpty = self.expr.mayReturnEmpty
+        self.setWhitespaceChars( self.expr.whiteChars )
+        self.skipWhitespace = self.expr.skipWhitespace
+        self.saveAsList = self.expr.saveAsList
+        self.ignoreExprs.extend(self.expr.ignoreExprs)
+        return self
+        
+    def __ilshift__(self, other):
+        return self << other
+    
+    def leaveWhitespace( self ):
+        self.skipWhitespace = False
+        return self
+
+    def streamline( self ):
+        if not self.streamlined:
+            self.streamlined = True
+            if self.expr is not None:
+                self.expr.streamline()
+        return self
+
+    def validate( self, validateTrace=[] ):
+        if self not in validateTrace:
+            tmp = validateTrace[:]+[self]
+            if self.expr is not None:
+                self.expr.validate(tmp)
+        self.checkRecursion([])
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+        return self.__class__.__name__ + ": ..."
+
+        # stubbed out for now - creates awful memory and perf issues
+        self._revertClass = self.__class__
+        self.__class__ = _ForwardNoRecurse
+        try:
+            if self.expr is not None:
+                retString = _ustr(self.expr)
+            else:
+                retString = "None"
+        finally:
+            self.__class__ = self._revertClass
+        return self.__class__.__name__ + ": " + retString
+
+    def copy(self):
+        if self.expr is not None:
+            return super(Forward,self).copy()
+        else:
+            ret = Forward()
+            ret <<= self
+            return ret
+
+class _ForwardNoRecurse(Forward):
+    def __str__( self ):
+        return "..."
+
+class TokenConverter(ParseElementEnhance):
+    """
+    Abstract subclass of C{ParseExpression}, for converting parsed results.
+    """
+    def __init__( self, expr, savelist=False ):
+        super(TokenConverter,self).__init__( expr )#, savelist )
+        self.saveAsList = False
+
+class Combine(TokenConverter):
+    """
+    Converter to concatenate all matching tokens to a single string.
+    By default, the matching patterns must also be contiguous in the input string;
+    this can be disabled by specifying C{'adjacent=False'} in the constructor.
+
+    Example::
+        real = Word(nums) + '.' + Word(nums)
+        print(real.parseString('3.1416')) # -> ['3', '.', '1416']
+        # will also erroneously match the following
+        print(real.parseString('3. 1416')) # -> ['3', '.', '1416']
+
+        real = Combine(Word(nums) + '.' + Word(nums))
+        print(real.parseString('3.1416')) # -> ['3.1416']
+        # no match when there are internal spaces
+        print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...)
+    """
+    def __init__( self, expr, joinString="", adjacent=True ):
+        super(Combine,self).__init__( expr )
+        # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself
+        if adjacent:
+            self.leaveWhitespace()
+        self.adjacent = adjacent
+        self.skipWhitespace = True
+        self.joinString = joinString
+        self.callPreparse = True
+
+    def ignore( self, other ):
+        if self.adjacent:
+            ParserElement.ignore(self, other)
+        else:
+            super( Combine, self).ignore( other )
+        return self
+
+    def postParse( self, instring, loc, tokenlist ):
+        retToks = tokenlist.copy()
+        del retToks[:]
+        retToks += ParseResults([ "".join(tokenlist._asStringList(self.joinString)) ], modal=self.modalResults)
+
+        if self.resultsName and retToks.haskeys():
+            return [ retToks ]
+        else:
+            return retToks
+
+class Group(TokenConverter):
+    """
+    Converter to return the matched tokens as a list - useful for returning tokens of C{L{ZeroOrMore}} and C{L{OneOrMore}} expressions.
+
+    Example::
+        ident = Word(alphas)
+        num = Word(nums)
+        term = ident | num
+        func = ident + Optional(delimitedList(term))
+        print(func.parseString("fn a,b,100"))  # -> ['fn', 'a', 'b', '100']
+
+        func = ident + Group(Optional(delimitedList(term)))
+        print(func.parseString("fn a,b,100"))  # -> ['fn', ['a', 'b', '100']]
+    """
+    def __init__( self, expr ):
+        super(Group,self).__init__( expr )
+        self.saveAsList = True
+
+    def postParse( self, instring, loc, tokenlist ):
+        return [ tokenlist ]
+
+class Dict(TokenConverter):
+    """
+    Converter to return a repetitive expression as a list, but also as a dictionary.
+    Each element can also be referenced using the first token in the expression as its key.
+    Useful for tabular report scraping when the first column can be used as a item key.
+
+    Example::
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        
+        # print attributes as plain groups
+        print(OneOrMore(attr_expr).parseString(text).dump())
+        
+        # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names
+        result = Dict(OneOrMore(Group(attr_expr))).parseString(text)
+        print(result.dump())
+        
+        # access named fields as dict entries, or output as dict
+        print(result['shape'])        
+        print(result.asDict())
+    prints::
+        ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']
+
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}
+    See more examples at L{ParseResults} of accessing fields by results name.
+    """
+    def __init__( self, expr ):
+        super(Dict,self).__init__( expr )
+        self.saveAsList = True
+
+    def postParse( self, instring, loc, tokenlist ):
+        for i,tok in enumerate(tokenlist):
+            if len(tok) == 0:
+                continue
+            ikey = tok[0]
+            if isinstance(ikey,int):
+                ikey = _ustr(tok[0]).strip()
+            if len(tok)==1:
+                tokenlist[ikey] = _ParseResultsWithOffset("",i)
+            elif len(tok)==2 and not isinstance(tok[1],ParseResults):
+                tokenlist[ikey] = _ParseResultsWithOffset(tok[1],i)
+            else:
+                dictvalue = tok.copy() #ParseResults(i)
+                del dictvalue[0]
+                if len(dictvalue)!= 1 or (isinstance(dictvalue,ParseResults) and dictvalue.haskeys()):
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue,i)
+                else:
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0],i)
+
+        if self.resultsName:
+            return [ tokenlist ]
+        else:
+            return tokenlist
+
+
+class Suppress(TokenConverter):
+    """
+    Converter for ignoring the results of a parsed expression.
+
+    Example::
+        source = "a, b, c,d"
+        wd = Word(alphas)
+        wd_list1 = wd + ZeroOrMore(',' + wd)
+        print(wd_list1.parseString(source))
+
+        # often, delimiters that are useful during parsing are just in the
+        # way afterward - use Suppress to keep them out of the parsed output
+        wd_list2 = wd + ZeroOrMore(Suppress(',') + wd)
+        print(wd_list2.parseString(source))
+    prints::
+        ['a', ',', 'b', ',', 'c', ',', 'd']
+        ['a', 'b', 'c', 'd']
+    (See also L{delimitedList}.)
+    """
+    def postParse( self, instring, loc, tokenlist ):
+        return []
+
+    def suppress( self ):
+        return self
+
+
+class OnlyOnce(object):
+    """
+    Wrapper for parse actions, to ensure they are only called once.
+    """
+    def __init__(self, methodCall):
+        self.callable = _trim_arity(methodCall)
+        self.called = False
+    def __call__(self,s,l,t):
+        if not self.called:
+            results = self.callable(s,l,t)
+            self.called = True
+            return results
+        raise ParseException(s,l,"")
+    def reset(self):
+        self.called = False
+
+def traceParseAction(f):
+    """
+    Decorator for debugging parse actions. 
+    
+    When the parse action is called, this decorator will print C{">> entering I{method-name}(line:I{current_source_line}, I{parse_location}, I{matched_tokens})".}
+    When the parse action completes, the decorator will print C{"<<"} followed by the returned value, or any exception that the parse action raised.
+
+    Example::
+        wd = Word(alphas)
+
+        @traceParseAction
+        def remove_duplicate_chars(tokens):
+            return ''.join(sorted(set(''.join(tokens))))
+
+        wds = OneOrMore(wd).setParseAction(remove_duplicate_chars)
+        print(wds.parseString("slkdjs sld sldd sdlf sdljf"))
+    prints::
+        >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))
+        <<leaving remove_duplicate_chars (ret: 'dfjkls')
+        ['dfjkls']
+    """
+    f = _trim_arity(f)
+    def z(*paArgs):
+        thisFunc = f.__name__
+        s,l,t = paArgs[-3:]
+        if len(paArgs)>3:
+            thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc
+        sys.stderr.write( ">>entering %s(line: '%s', %d, %r)\n" % (thisFunc,line(l,s),l,t) )
+        try:
+            ret = f(*paArgs)
+        except Exception as exc:
+            sys.stderr.write( "<<leaving %s (exception: %s)\n" % (thisFunc,exc) )
+            raise
+        sys.stderr.write( "<<leaving %s (ret: %r)\n" % (thisFunc,ret) )
+        return ret
+    try:
+        z.__name__ = f.__name__
+    except AttributeError:
+        pass
+    return z
+
+#
+# global helpers
+#
+def delimitedList( expr, delim=",", combine=False ):
+    """
+    Helper to define a delimited list of expressions - the delimiter defaults to ','.
+    By default, the list elements and delimiters can have intervening whitespace, and
+    comments, but this can be overridden by passing C{combine=True} in the constructor.
+    If C{combine} is set to C{True}, the matching tokens are returned as a single token
+    string, with the delimiters included; otherwise, the matching tokens are returned
+    as a list of tokens, with the delimiters suppressed.
+
+    Example::
+        delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc']
+        delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']
+    """
+    dlName = _ustr(expr)+" ["+_ustr(delim)+" "+_ustr(expr)+"]..."
+    if combine:
+        return Combine( expr + ZeroOrMore( delim + expr ) ).setName(dlName)
+    else:
+        return ( expr + ZeroOrMore( Suppress( delim ) + expr ) ).setName(dlName)
+
+def countedArray( expr, intExpr=None ):
+    """
+    Helper to define a counted list of expressions.
+    This helper defines a pattern of the form::
+        integer expr expr expr...
+    where the leading integer tells how many expr expressions follow.
+    The matched tokens returns the array of expr tokens as a list - the leading count token is suppressed.
+    
+    If C{intExpr} is specified, it should be a pyparsing expression that produces an integer value.
+
+    Example::
+        countedArray(Word(alphas)).parseString('2 ab cd ef')  # -> ['ab', 'cd']
+
+        # in this parser, the leading integer value is given in binary,
+        # '10' indicating that 2 values are in the array
+        binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2))
+        countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef')  # -> ['ab', 'cd']
+    """
+    arrayExpr = Forward()
+    def countFieldParseAction(s,l,t):
+        n = t[0]
+        arrayExpr << (n and Group(And([expr]*n)) or Group(empty))
+        return []
+    if intExpr is None:
+        intExpr = Word(nums).setParseAction(lambda t:int(t[0]))
+    else:
+        intExpr = intExpr.copy()
+    intExpr.setName("arrayLen")
+    intExpr.addParseAction(countFieldParseAction, callDuringTry=True)
+    return ( intExpr + arrayExpr ).setName('(len) ' + _ustr(expr) + '...')
+
+def _flatten(L):
+    ret = []
+    for i in L:
+        if isinstance(i,list):
+            ret.extend(_flatten(i))
+        else:
+            ret.append(i)
+    return ret
+
+def matchPreviousLiteral(expr):
+    """
+    Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks
+    for a 'repeat' of a previous expression.  For example::
+        first = Word(nums)
+        second = matchPreviousLiteral(first)
+        matchExpr = first + ":" + second
+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches a
+    previous literal, will also match the leading C{"1:1"} in C{"1:10"}.
+    If this is not desired, use C{matchPreviousExpr}.
+    Do I{not} use with packrat parsing enabled.
+    """
+    rep = Forward()
+    def copyTokenToRepeater(s,l,t):
+        if t:
+            if len(t) == 1:
+                rep << t[0]
+            else:
+                # flatten t tokens
+                tflat = _flatten(t.asList())
+                rep << And(Literal(tt) for tt in tflat)
+        else:
+            rep << Empty()
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def matchPreviousExpr(expr):
+    """
+    Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks
+    for a 'repeat' of a previous expression.  For example::
+        first = Word(nums)
+        second = matchPreviousExpr(first)
+        matchExpr = first + ":" + second
+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches by
+    expressions, will I{not} match the leading C{"1:1"} in C{"1:10"};
+    the expressions are evaluated first, and then compared, so
+    C{"1"} is compared with C{"10"}.
+    Do I{not} use with packrat parsing enabled.
+    """
+    rep = Forward()
+    e2 = expr.copy()
+    rep <<= e2
+    def copyTokenToRepeater(s,l,t):
+        matchTokens = _flatten(t.asList())
+        def mustMatchTheseTokens(s,l,t):
+            theseTokens = _flatten(t.asList())
+            if  theseTokens != matchTokens:
+                raise ParseException("",0,"")
+        rep.setParseAction( mustMatchTheseTokens, callDuringTry=True )
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def _escapeRegexRangeChars(s):
+    #~  escape these chars: ^-]
+    for c in r"\^-]":
+        s = s.replace(c,_bslash+c)
+    s = s.replace("\n",r"\n")
+    s = s.replace("\t",r"\t")
+    return _ustr(s)
+
+def oneOf( strs, caseless=False, useRegex=True ):
+    """
+    Helper to quickly define a set of alternative Literals, and makes sure to do
+    longest-first testing when there is a conflict, regardless of the input order,
+    but returns a C{L{MatchFirst}} for best performance.
+
+    Parameters:
+     - strs - a string of space-delimited literals, or a collection of string literals
+     - caseless - (default=C{False}) - treat all literals as caseless
+     - useRegex - (default=C{True}) - as an optimization, will generate a Regex
+          object; otherwise, will generate a C{MatchFirst} object (if C{caseless=True}, or
+          if creating a C{Regex} raises an exception)
+
+    Example::
+        comp_oper = oneOf("< = > <= >= !=")
+        var = Word(alphas)
+        number = Word(nums)
+        term = var | number
+        comparison_expr = term + comp_oper + term
+        print(comparison_expr.searchString("B = 12  AA=23 B<=AA AA>12"))
+    prints::
+        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]
+    """
+    if caseless:
+        isequal = ( lambda a,b: a.upper() == b.upper() )
+        masks = ( lambda a,b: b.upper().startswith(a.upper()) )
+        parseElementClass = CaselessLiteral
+    else:
+        isequal = ( lambda a,b: a == b )
+        masks = ( lambda a,b: b.startswith(a) )
+        parseElementClass = Literal
+
+    symbols = []
+    if isinstance(strs,basestring):
+        symbols = strs.split()
+    elif isinstance(strs, Iterable):
+        symbols = list(strs)
+    else:
+        warnings.warn("Invalid argument to oneOf, expected string or iterable",
+                SyntaxWarning, stacklevel=2)
+    if not symbols:
+        return NoMatch()
+
+    i = 0
+    while i < len(symbols)-1:
+        cur = symbols[i]
+        for j,other in enumerate(symbols[i+1:]):
+            if ( isequal(other, cur) ):
+                del symbols[i+j+1]
+                break
+            elif ( masks(cur, other) ):
+                del symbols[i+j+1]
+                symbols.insert(i,other)
+                cur = other
+                break
+        else:
+            i += 1
+
+    if not caseless and useRegex:
+        #~ print (strs,"->", "|".join( [ _escapeRegexChars(sym) for sym in symbols] ))
+        try:
+            if len(symbols)==len("".join(symbols)):
+                return Regex( "[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols) ).setName(' | '.join(symbols))
+            else:
+                return Regex( "|".join(re.escape(sym) for sym in symbols) ).setName(' | '.join(symbols))
+        except Exception:
+            warnings.warn("Exception creating Regex for oneOf, building MatchFirst",
+                    SyntaxWarning, stacklevel=2)
+
+
+    # last resort, just use MatchFirst
+    return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols))
+
+def dictOf( key, value ):
+    """
+    Helper to easily and clearly define a dictionary by specifying the respective patterns
+    for the key and value.  Takes care of defining the C{L{Dict}}, C{L{ZeroOrMore}}, and C{L{Group}} tokens
+    in the proper order.  The key pattern can include delimiting markers or punctuation,
+    as long as they are suppressed, thereby leaving the significant key text.  The value
+    pattern can include named results, so that the C{Dict} results can include named token
+    fields.
+
+    Example::
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        print(OneOrMore(attr_expr).parseString(text).dump())
+        
+        attr_label = label
+        attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)
+
+        # similar to Dict, but simpler call format
+        result = dictOf(attr_label, attr_value).parseString(text)
+        print(result.dump())
+        print(result['shape'])
+        print(result.shape)  # object attribute access works too
+        print(result.asDict())
+    prints::
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        SQUARE
+        {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}
+    """
+    return Dict( ZeroOrMore( Group ( key + value ) ) )
+
+def originalTextFor(expr, asString=True):
+    """
+    Helper to return the original, untokenized text for a given expression.  Useful to
+    restore the parsed fields of an HTML start tag into the raw tag text itself, or to
+    revert separate tokens with intervening whitespace back to the original matching
+    input text. By default, returns astring containing the original parsed text.  
+       
+    If the optional C{asString} argument is passed as C{False}, then the return value is a 
+    C{L{ParseResults}} containing any results names that were originally matched, and a 
+    single token containing the original matched text from the input string.  So if 
+    the expression passed to C{L{originalTextFor}} contains expressions with defined
+    results names, you must set C{asString} to C{False} if you want to preserve those
+    results name values.
+
+    Example::
+        src = "this is test <b> bold <i>text</i> </b> normal text "
+        for tag in ("b","i"):
+            opener,closer = makeHTMLTags(tag)
+            patt = originalTextFor(opener + SkipTo(closer) + closer)
+            print(patt.searchString(src)[0])
+    prints::
+        ['<b> bold <i>text</i> </b>']
+        ['<i>text</i>']
+    """
+    locMarker = Empty().setParseAction(lambda s,loc,t: loc)
+    endlocMarker = locMarker.copy()
+    endlocMarker.callPreparse = False
+    matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end")
+    if asString:
+        extractText = lambda s,l,t: s[t._original_start:t._original_end]
+    else:
+        def extractText(s,l,t):
+            t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]]
+    matchExpr.setParseAction(extractText)
+    matchExpr.ignoreExprs = expr.ignoreExprs
+    return matchExpr
+
+def ungroup(expr): 
+    """
+    Helper to undo pyparsing's default grouping of And expressions, even
+    if all but one are non-empty.
+    """
+    return TokenConverter(expr).setParseAction(lambda t:t[0])
+
+def locatedExpr(expr):
+    """
+    Helper to decorate a returned token with its starting and ending locations in the input string.
+    This helper adds the following results names:
+     - locn_start = location where matched expression begins
+     - locn_end = location where matched expression ends
+     - value = the actual parsed results
+
+    Be careful if the input text contains C{<TAB>} characters, you may want to call
+    C{L{ParserElement.parseWithTabs}}
+
+    Example::
+        wd = Word(alphas)
+        for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):
+            print(match)
+    prints::
+        [[0, 'ljsdf', 5]]
+        [[8, 'lksdjjf', 15]]
+        [[18, 'lkkjj', 23]]
+    """
+    locator = Empty().setParseAction(lambda s,l,t: l)
+    return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end"))
+
+
+# convenience constants for positional expressions
+empty       = Empty().setName("empty")
+lineStart   = LineStart().setName("lineStart")
+lineEnd     = LineEnd().setName("lineEnd")
+stringStart = StringStart().setName("stringStart")
+stringEnd   = StringEnd().setName("stringEnd")
+
+_escapedPunc = Word( _bslash, r"\[]-*.$+^?()~ ", exact=2 ).setParseAction(lambda s,l,t:t[0][1])
+_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s,l,t:unichr(int(t[0].lstrip(r'\0x'),16)))
+_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s,l,t:unichr(int(t[0][1:],8)))
+_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1)
+_charRange = Group(_singleChar + Suppress("-") + _singleChar)
+_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group( OneOrMore( _charRange | _singleChar ) ).setResultsName("body") + "]"
+
+def srange(s):
+    r"""
+    Helper to easily define string ranges for use in Word construction.  Borrows
+    syntax from regexp '[]' string range definitions::
+        srange("[0-9]")   -> "0123456789"
+        srange("[a-z]")   -> "abcdefghijklmnopqrstuvwxyz"
+        srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
+    The input string must be enclosed in []'s, and the returned string is the expanded
+    character set joined into a single string.
+    The values enclosed in the []'s may be:
+     - a single character
+     - an escaped character with a leading backslash (such as C{\-} or C{\]})
+     - an escaped hex character with a leading C{'\x'} (C{\x21}, which is a C{'!'} character) 
+         (C{\0x##} is also supported for backwards compatibility) 
+     - an escaped octal character with a leading C{'\0'} (C{\041}, which is a C{'!'} character)
+     - a range of any of the above, separated by a dash (C{'a-z'}, etc.)
+     - any combination of the above (C{'aeiouy'}, C{'a-zA-Z0-9_$'}, etc.)
+    """
+    _expanded = lambda p: p if not isinstance(p,ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]),ord(p[1])+1))
+    try:
+        return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body)
+    except Exception:
+        return ""
+
+def matchOnlyAtCol(n):
+    """
+    Helper method for defining parse actions that require matching at a specific
+    column in the input text.
+    """
+    def verifyCol(strg,locn,toks):
+        if col(locn,strg) != n:
+            raise ParseException(strg,locn,"matched token not at column %d" % n)
+    return verifyCol
+
+def replaceWith(replStr):
+    """
+    Helper method for common parse actions that simply return a literal value.  Especially
+    useful when used with C{L{transformString<ParserElement.transformString>}()}.
+
+    Example::
+        num = Word(nums).setParseAction(lambda toks: int(toks[0]))
+        na = oneOf("N/A NA").setParseAction(replaceWith(math.nan))
+        term = na | num
+        
+        OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234]
+    """
+    return lambda s,l,t: [replStr]
+
+def removeQuotes(s,l,t):
+    """
+    Helper parse action for removing quotation marks from parsed quoted strings.
+
+    Example::
+        # by default, quotation marks are included in parsed results
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]
+
+        # use removeQuotes to strip quotation marks from parsed results
+        quotedString.setParseAction(removeQuotes)
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]
+    """
+    return t[0][1:-1]
+
+def tokenMap(func, *args):
+    """
+    Helper to define a parse action by mapping a function to all elements of a ParseResults list.If any additional 
+    args are passed, they are forwarded to the given function as additional arguments after
+    the token, as in C{hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))}, which will convert the
+    parsed data to an integer using base 16.
+
+    Example (compare the last to example in L{ParserElement.transformString}::
+        hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16))
+        hex_ints.runTests('''
+            00 11 22 aa FF 0a 0d 1a
+            ''')
+        
+        upperword = Word(alphas).setParseAction(tokenMap(str.upper))
+        OneOrMore(upperword).runTests('''
+            my kingdom for a horse
+            ''')
+
+        wd = Word(alphas).setParseAction(tokenMap(str.title))
+        OneOrMore(wd).setParseAction(' '.join).runTests('''
+            now is the winter of our discontent made glorious summer by this sun of york
+            ''')
+    prints::
+        00 11 22 aa FF 0a 0d 1a
+        [0, 17, 34, 170, 255, 10, 13, 26]
+
+        my kingdom for a horse
+        ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']
+
+        now is the winter of our discontent made glorious summer by this sun of york
+        ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']
+    """
+    def pa(s,l,t):
+        return [func(tokn, *args) for tokn in t]
+
+    try:
+        func_name = getattr(func, '__name__', 
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    pa.__name__ = func_name
+
+    return pa
+
+upcaseTokens = tokenMap(lambda t: _ustr(t).upper())
+"""(Deprecated) Helper parse action to convert tokens to upper case. Deprecated in favor of L{pyparsing_common.upcaseTokens}"""
+
+downcaseTokens = tokenMap(lambda t: _ustr(t).lower())
+"""(Deprecated) Helper parse action to convert tokens to lower case. Deprecated in favor of L{pyparsing_common.downcaseTokens}"""
+    
+def _makeTags(tagStr, xml):
+    """Internal helper to construct opening and closing tag expressions, given a tag name"""
+    if isinstance(tagStr,basestring):
+        resname = tagStr
+        tagStr = Keyword(tagStr, caseless=not xml)
+    else:
+        resname = tagStr.name
+
+    tagAttrName = Word(alphas,alphanums+"_-:")
+    if (xml):
+        tagAttrValue = dblQuotedString.copy().setParseAction( removeQuotes )
+        openTag = Suppress("<") + tagStr("tag") + \
+                Dict(ZeroOrMore(Group( tagAttrName + Suppress("=") + tagAttrValue ))) + \
+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
+    else:
+        printablesLessRAbrack = "".join(c for c in printables if c not in ">")
+        tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printablesLessRAbrack)
+        openTag = Suppress("<") + tagStr("tag") + \
+                Dict(ZeroOrMore(Group( tagAttrName.setParseAction(downcaseTokens) + \
+                Optional( Suppress("=") + tagAttrValue ) ))) + \
+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
+    closeTag = Combine(_L("</") + tagStr + ">")
+
+    openTag = openTag.setResultsName("start"+"".join(resname.replace(":"," ").title().split())).setName("<%s>" % resname)
+    closeTag = closeTag.setResultsName("end"+"".join(resname.replace(":"," ").title().split())).setName("</%s>" % resname)
+    openTag.tag = resname
+    closeTag.tag = resname
+    return openTag, closeTag
+
+def makeHTMLTags(tagStr):
+    """
+    Helper to construct opening and closing tag expressions for HTML, given a tag name. Matches
+    tags in either upper or lower case, attributes with namespaces and with quoted or unquoted values.
+
+    Example::
+        text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'
+        # makeHTMLTags returns pyparsing expressions for the opening and closing tags as a 2-tuple
+        a,a_end = makeHTMLTags("A")
+        link_expr = a + SkipTo(a_end)("link_text") + a_end
+        
+        for link in link_expr.searchString(text):
+            # attributes in the <A> tag (like "href" shown here) are also accessible as named results
+            print(link.link_text, '->', link.href)
+    prints::
+        pyparsing -> http://pyparsing.wikispaces.com
+    """
+    return _makeTags( tagStr, False )
+
+def makeXMLTags(tagStr):
+    """
+    Helper to construct opening and closing tag expressions for XML, given a tag name. Matches
+    tags only in the given upper/lower case.
+
+    Example: similar to L{makeHTMLTags}
+    """
+    return _makeTags( tagStr, True )
+
+def withAttribute(*args,**attrDict):
+    """
+    Helper to create a validating parse action to be used with start tags created
+    with C{L{makeXMLTags}} or C{L{makeHTMLTags}}. Use C{withAttribute} to qualify a starting tag
+    with a required attribute value, to avoid false matches on common tags such as
+    C{<TD>} or C{<DIV>}.
+
+    Call C{withAttribute} with a series of attribute names and values. Specify the list
+    of filter attributes names and values as:
+     - keyword arguments, as in C{(align="right")}, or
+     - as an explicit dict with C{**} operator, when an attribute name is also a Python
+          reserved word, as in C{**{"class":"Customer", "align":"right"}}
+     - a list of name-value tuples, as in ( ("ns1:class", "Customer"), ("ns2:align","right") )
+    For attribute names with a namespace prefix, you must use the second form.  Attribute
+    names are matched insensitive to upper/lower case.
+       
+    If just testing for C{class} (with or without a namespace), use C{L{withClass}}.
+
+    To verify that the attribute exists, but without specifying a value, pass
+    C{withAttribute.ANY_VALUE} as the value.
+
+    Example::
+        html = '''
+            <div>
+            Some text
+            <div type="grid">1 4 0 1 0</div>
+            <div type="graph">1,3 2,3 1,1</div>
+            <div>this has no type</div>
+            </div>
+                
+        '''
+        div,div_end = makeHTMLTags("div")
+
+        # only match div tag having a type attribute with value "grid"
+        div_grid = div().setParseAction(withAttribute(type="grid"))
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+        
+        # construct a match with any div tag having a type attribute, regardless of the value
+        div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+    prints::
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    if args:
+        attrs = args[:]
+    else:
+        attrs = attrDict.items()
+    attrs = [(k,v) for k,v in attrs]
+    def pa(s,l,tokens):
+        for attrName,attrValue in attrs:
+            if attrName not in tokens:
+                raise ParseException(s,l,"no matching attribute " + attrName)
+            if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue:
+                raise ParseException(s,l,"attribute '%s' has value '%s', must be '%s'" %
+                                            (attrName, tokens[attrName], attrValue))
+    return pa
+withAttribute.ANY_VALUE = object()
+
+def withClass(classname, namespace=''):
+    """
+    Simplified version of C{L{withAttribute}} when matching on a div class - made
+    difficult because C{class} is a reserved word in Python.
+
+    Example::
+        html = '''
+            <div>
+            Some text
+            <div class="grid">1 4 0 1 0</div>
+            <div class="graph">1,3 2,3 1,1</div>
+            <div>this &lt;div&gt; has no class</div>
+            </div>
+                
+        '''
+        div,div_end = makeHTMLTags("div")
+        div_grid = div().setParseAction(withClass("grid"))
+        
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+        
+        div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+    prints::
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    classattr = "%s:class" % namespace if namespace else "class"
+    return withAttribute(**{classattr : classname})        
+
+opAssoc = _Constants()
+opAssoc.LEFT = object()
+opAssoc.RIGHT = object()
+
+def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ):
+    """
+    Helper method for constructing grammars of expressions made up of
+    operators working in a precedence hierarchy.  Operators may be unary or
+    binary, left- or right-associative.  Parse actions can also be attached
+    to operator expressions. The generated parser will also recognize the use 
+    of parentheses to override operator precedences (see example below).
+    
+    Note: if you define a deep operator list, you may see performance issues
+    when using infixNotation. See L{ParserElement.enablePackrat} for a
+    mechanism to potentially improve your parser performance.
+
+    Parameters:
+     - baseExpr - expression representing the most basic element for the nested
+     - opList - list of tuples, one for each operator precedence level in the
+      expression grammar; each tuple is of the form
+      (opExpr, numTerms, rightLeftAssoc, parseAction), where:
+       - opExpr is the pyparsing expression for the operator;
+          may also be a string, which will be converted to a Literal;
+          if numTerms is 3, opExpr is a tuple of two expressions, for the
+          two operators separating the 3 terms
+       - numTerms is the number of terms for this operator (must
+          be 1, 2, or 3)
+       - rightLeftAssoc is the indicator whether the operator is
+          right or left associative, using the pyparsing-defined
+          constants C{opAssoc.RIGHT} and C{opAssoc.LEFT}.
+       - parseAction is the parse action to be associated with
+          expressions matching this operator expression (the
+          parse action tuple member may be omitted); if the parse action
+          is passed a tuple or list of functions, this is equivalent to
+          calling C{setParseAction(*fn)} (L{ParserElement.setParseAction})
+     - lpar - expression for matching left-parentheses (default=C{Suppress('(')})
+     - rpar - expression for matching right-parentheses (default=C{Suppress(')')})
+
+    Example::
+        # simple example of four-function arithmetic with ints and variable names
+        integer = pyparsing_common.signed_integer
+        varname = pyparsing_common.identifier 
+        
+        arith_expr = infixNotation(integer | varname,
+            [
+            ('-', 1, opAssoc.RIGHT),
+            (oneOf('* /'), 2, opAssoc.LEFT),
+            (oneOf('+ -'), 2, opAssoc.LEFT),
+            ])
+        
+        arith_expr.runTests('''
+            5+3*6
+            (5+3)*6
+            -2--11
+            ''', fullDump=False)
+    prints::
+        5+3*6
+        [[5, '+', [3, '*', 6]]]
+
+        (5+3)*6
+        [[[5, '+', 3], '*', 6]]
+
+        -2--11
+        [[['-', 2], '-', ['-', 11]]]
+    """
+    ret = Forward()
+    lastExpr = baseExpr | ( lpar + ret + rpar )
+    for i,operDef in enumerate(opList):
+        opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4]
+        termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr
+        if arity == 3:
+            if opExpr is None or len(opExpr) != 2:
+                raise ValueError("if numterms=3, opExpr must be a tuple or list of two expressions")
+            opExpr1, opExpr2 = opExpr
+        thisExpr = Forward().setName(termName)
+        if rightLeftAssoc == opAssoc.LEFT:
+            if arity == 1:
+                matchExpr = FollowedBy(lastExpr + opExpr) + Group( lastExpr + OneOrMore( opExpr ) )
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = FollowedBy(lastExpr + opExpr + lastExpr) + Group( lastExpr + OneOrMore( opExpr + lastExpr ) )
+                else:
+                    matchExpr = FollowedBy(lastExpr+lastExpr) + Group( lastExpr + OneOrMore(lastExpr) )
+            elif arity == 3:
+                matchExpr = FollowedBy(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr) + \
+                            Group( lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr )
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        elif rightLeftAssoc == opAssoc.RIGHT:
+            if arity == 1:
+                # try to avoid LR with this extra test
+                if not isinstance(opExpr, Optional):
+                    opExpr = Optional(opExpr)
+                matchExpr = FollowedBy(opExpr.expr + thisExpr) + Group( opExpr + thisExpr )
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = FollowedBy(lastExpr + opExpr + thisExpr) + Group( lastExpr + OneOrMore( opExpr + thisExpr ) )
+                else:
+                    matchExpr = FollowedBy(lastExpr + thisExpr) + Group( lastExpr + OneOrMore( thisExpr ) )
+            elif arity == 3:
+                matchExpr = FollowedBy(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + \
+                            Group( lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr )
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        else:
+            raise ValueError("operator must indicate right or left associativity")
+        if pa:
+            if isinstance(pa, (tuple, list)):
+                matchExpr.setParseAction(*pa)
+            else:
+                matchExpr.setParseAction(pa)
+        thisExpr <<= ( matchExpr.setName(termName) | lastExpr )
+        lastExpr = thisExpr
+    ret <<= lastExpr
+    return ret
+
+operatorPrecedence = infixNotation
+"""(Deprecated) Former name of C{L{infixNotation}}, will be dropped in a future release."""
+
+dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"').setName("string enclosed in double quotes")
+sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("string enclosed in single quotes")
+quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"'|
+                       Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("quotedString using single or double quotes")
+unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal")
+
+def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()):
+    """
+    Helper method for defining nested lists enclosed in opening and closing
+    delimiters ("(" and ")" are the default).
+
+    Parameters:
+     - opener - opening character for a nested list (default=C{"("}); can also be a pyparsing expression
+     - closer - closing character for a nested list (default=C{")"}); can also be a pyparsing expression
+     - content - expression for items within the nested lists (default=C{None})
+     - ignoreExpr - expression for ignoring opening and closing delimiters (default=C{quotedString})
+
+    If an expression is not provided for the content argument, the nested
+    expression will capture all whitespace-delimited content between delimiters
+    as a list of separate values.
+
+    Use the C{ignoreExpr} argument to define expressions that may contain
+    opening or closing characters that should not be treated as opening
+    or closing characters for nesting, such as quotedString or a comment
+    expression.  Specify multiple expressions using an C{L{Or}} or C{L{MatchFirst}}.
+    The default is L{quotedString}, but if no expressions are to be ignored,
+    then pass C{None} for this argument.
+
+    Example::
+        data_type = oneOf("void int short long char float double")
+        decl_data_type = Combine(data_type + Optional(Word('*')))
+        ident = Word(alphas+'_', alphanums+'_')
+        number = pyparsing_common.number
+        arg = Group(decl_data_type + ident)
+        LPAR,RPAR = map(Suppress, "()")
+
+        code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment))
+
+        c_function = (decl_data_type("type") 
+                      + ident("name")
+                      + LPAR + Optional(delimitedList(arg), [])("args") + RPAR 
+                      + code_body("body"))
+        c_function.ignore(cStyleComment)
+        
+        source_code = '''
+            int is_odd(int x) { 
+                return (x%2); 
+            }
+                
+            int dec_to_hex(char hchar) { 
+                if (hchar >= '0' && hchar <= '9') { 
+                    return (ord(hchar)-ord('0')); 
+                } else { 
+                    return (10+ord(hchar)-ord('A'));
+                } 
+            }
+        '''
+        for func in c_function.searchString(source_code):
+            print("%(name)s (%(type)s) args: %(args)s" % func)
+
+    prints::
+        is_odd (int) args: [['int', 'x']]
+        dec_to_hex (int) args: [['char', 'hchar']]
+    """
+    if opener == closer:
+        raise ValueError("opening and closing strings cannot be the same")
+    if content is None:
+        if isinstance(opener,basestring) and isinstance(closer,basestring):
+            if len(opener) == 1 and len(closer)==1:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr +
+                                    CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+                else:
+                    content = (empty.copy()+CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS
+                                ).setParseAction(lambda t:t[0].strip()))
+            else:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr + 
+                                    ~Literal(opener) + ~Literal(closer) +
+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+                else:
+                    content = (Combine(OneOrMore(~Literal(opener) + ~Literal(closer) +
+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+        else:
+            raise ValueError("opening and closing arguments must be strings if no content expression is given")
+    ret = Forward()
+    if ignoreExpr is not None:
+        ret <<= Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) )
+    else:
+        ret <<= Group( Suppress(opener) + ZeroOrMore( ret | content )  + Suppress(closer) )
+    ret.setName('nested %s%s expression' % (opener,closer))
+    return ret
+
+def indentedBlock(blockStatementExpr, indentStack, indent=True):
+    """
+    Helper method for defining space-delimited indentation blocks, such as
+    those used to define block statements in Python source code.
+
+    Parameters:
+     - blockStatementExpr - expression defining syntax of statement that
+            is repeated within the indented block
+     - indentStack - list created by caller to manage indentation stack
+            (multiple statementWithIndentedBlock expressions within a single grammar
+            should share a common indentStack)
+     - indent - boolean indicating whether block must be indented beyond the
+            the current level; set to False for block of left-most statements
+            (default=C{True})
+
+    A valid block must contain at least one C{blockStatement}.
+
+    Example::
+        data = '''
+        def A(z):
+          A1
+          B = 100
+          G = A2
+          A2
+          A3
+        B
+        def BB(a,b,c):
+          BB1
+          def BBA():
+            bba1
+            bba2
+            bba3
+        C
+        D
+        def spam(x,y):
+             def eggs(z):
+                 pass
+        '''
+
+
+        indentStack = [1]
+        stmt = Forward()
+
+        identifier = Word(alphas, alphanums)
+        funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":")
+        func_body = indentedBlock(stmt, indentStack)
+        funcDef = Group( funcDecl + func_body )
+
+        rvalue = Forward()
+        funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")")
+        rvalue << (funcCall | identifier | Word(nums))
+        assignment = Group(identifier + "=" + rvalue)
+        stmt << ( funcDef | assignment | identifier )
+
+        module_body = OneOrMore(stmt)
+
+        parseTree = module_body.parseString(data)
+        parseTree.pprint()
+    prints::
+        [['def',
+          'A',
+          ['(', 'z', ')'],
+          ':',
+          [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],
+         'B',
+         ['def',
+          'BB',
+          ['(', 'a', 'b', 'c', ')'],
+          ':',
+          [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],
+         'C',
+         'D',
+         ['def',
+          'spam',
+          ['(', 'x', 'y', ')'],
+          ':',
+          [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] 
+    """
+    def checkPeerIndent(s,l,t):
+        if l >= len(s): return
+        curCol = col(l,s)
+        if curCol != indentStack[-1]:
+            if curCol > indentStack[-1]:
+                raise ParseFatalException(s,l,"illegal nesting")
+            raise ParseException(s,l,"not a peer entry")
+
+    def checkSubIndent(s,l,t):
+        curCol = col(l,s)
+        if curCol > indentStack[-1]:
+            indentStack.append( curCol )
+        else:
+            raise ParseException(s,l,"not a subentry")
+
+    def checkUnindent(s,l,t):
+        if l >= len(s): return
+        curCol = col(l,s)
+        if not(indentStack and curCol < indentStack[-1] and curCol <= indentStack[-2]):
+            raise ParseException(s,l,"not an unindent")
+        indentStack.pop()
+
+    NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress())
+    INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT')
+    PEER   = Empty().setParseAction(checkPeerIndent).setName('')
+    UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT')
+    if indent:
+        smExpr = Group( Optional(NL) +
+            #~ FollowedBy(blockStatementExpr) +
+            INDENT + (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) + UNDENT)
+    else:
+        smExpr = Group( Optional(NL) +
+            (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) )
+    blockStatementExpr.ignore(_bslash + LineEnd())
+    return smExpr.setName('indented block')
+
+alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]")
+punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]")
+
+anyOpenTag,anyCloseTag = makeHTMLTags(Word(alphas,alphanums+"_:").setName('any tag'))
+_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(),'><& "\''))
+commonHTMLEntity = Regex('&(?P<entity>' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity")
+def replaceHTMLEntity(t):
+    """Helper parser action to replace common HTML entities with their special characters"""
+    return _htmlEntityMap.get(t.entity)
+
+# it's easy to get these comment structures wrong - they're very common, so may as well make them available
+cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment")
+"Comment of the form C{/* ... */}"
+
+htmlComment = Regex(r"<!--[\s\S]*?-->").setName("HTML comment")
+"Comment of the form C{<!-- ... -->}"
+
+restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line")
+dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment")
+"Comment of the form C{// ... (to end of line)}"
+
+cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/'| dblSlashComment).setName("C++ style comment")
+"Comment of either form C{L{cStyleComment}} or C{L{dblSlashComment}}"
+
+javaStyleComment = cppStyleComment
+"Same as C{L{cppStyleComment}}"
+
+pythonStyleComment = Regex(r"#.*").setName("Python style comment")
+"Comment of the form C{# ... (to end of line)}"
+
+_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',') +
+                                  Optional( Word(" \t") +
+                                            ~Literal(",") + ~LineEnd() ) ) ).streamline().setName("commaItem")
+commaSeparatedList = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("commaSeparatedList")
+"""(Deprecated) Predefined expression of 1 or more printable words or quoted strings, separated by commas.
+   This expression is deprecated in favor of L{pyparsing_common.comma_separated_list}."""
+
+# some other useful expressions - using lower-case class name since we are really using this as a namespace
+class pyparsing_common:
+    """
+    Here are some common low-level expressions that may be useful in jump-starting parser development:
+     - numeric forms (L{integers<integer>}, L{reals<real>}, L{scientific notation<sci_real>})
+     - common L{programming identifiers<identifier>}
+     - network addresses (L{MAC<mac_address>}, L{IPv4<ipv4_address>}, L{IPv6<ipv6_address>})
+     - ISO8601 L{dates<iso8601_date>} and L{datetime<iso8601_datetime>}
+     - L{UUID<uuid>}
+     - L{comma-separated list<comma_separated_list>}
+    Parse actions:
+     - C{L{convertToInteger}}
+     - C{L{convertToFloat}}
+     - C{L{convertToDate}}
+     - C{L{convertToDatetime}}
+     - C{L{stripHTMLTags}}
+     - C{L{upcaseTokens}}
+     - C{L{downcaseTokens}}
+
+    Example::
+        pyparsing_common.number.runTests('''
+            # any int or real number, returned as the appropriate type
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.fnumber.runTests('''
+            # any int or real number, returned as float
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.hex_integer.runTests('''
+            # hex numbers
+            100
+            FF
+            ''')
+
+        pyparsing_common.fraction.runTests('''
+            # fractions
+            1/2
+            -3/4
+            ''')
+
+        pyparsing_common.mixed_integer.runTests('''
+            # mixed fractions
+            1
+            1/2
+            -3/4
+            1-3/4
+            ''')
+
+        import uuid
+        pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+        pyparsing_common.uuid.runTests('''
+            # uuid
+            12345678-1234-5678-1234-567812345678
+            ''')
+    prints::
+        # any int or real number, returned as the appropriate type
+        100
+        [100]
+
+        -100
+        [-100]
+
+        +100
+        [100]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # any int or real number, returned as float
+        100
+        [100.0]
+
+        -100
+        [-100.0]
+
+        +100
+        [100.0]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # hex numbers
+        100
+        [256]
+
+        FF
+        [255]
+
+        # fractions
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        # mixed fractions
+        1
+        [1]
+
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        1-3/4
+        [1.75]
+
+        # uuid
+        12345678-1234-5678-1234-567812345678
+        [UUID('12345678-1234-5678-1234-567812345678')]
+    """
+
+    convertToInteger = tokenMap(int)
+    """
+    Parse action for converting parsed integers to Python int
+    """
+
+    convertToFloat = tokenMap(float)
+    """
+    Parse action for converting parsed numbers to Python float
+    """
+
+    integer = Word(nums).setName("integer").setParseAction(convertToInteger)
+    """expression that parses an unsigned integer, returns an int"""
+
+    hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int,16))
+    """expression that parses a hexadecimal integer, returns an int"""
+
+    signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger)
+    """expression that parses an integer with optional leading sign, returns an int"""
+
+    fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction")
+    """fractional expression of an integer divided by an integer, returns a float"""
+    fraction.addParseAction(lambda t: t[0]/t[-1])
+
+    mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction")
+    """mixed integer of the form 'integer - fraction', with optional leading integer, returns float"""
+    mixed_integer.addParseAction(sum)
+
+    real = Regex(r'[+-]?\d+\.\d*').setName("real number").setParseAction(convertToFloat)
+    """expression that parses a floating point number and returns a float"""
+
+    sci_real = Regex(r'[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat)
+    """expression that parses a floating point number with optional scientific notation and returns a float"""
+
+    # streamlining this expression makes the docs nicer-looking
+    number = (sci_real | real | signed_integer).streamline()
+    """any numeric expression, returns the corresponding Python type"""
+
+    fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat)
+    """any int or real number, returned as float"""
+    
+    identifier = Word(alphas+'_', alphanums+'_').setName("identifier")
+    """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')"""
+    
+    ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address")
+    "IPv4 address (C{0.0.0.0 - 255.255.255.255})"
+
+    _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer")
+    _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part)*7).setName("full IPv6 address")
+    _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part)*(0,6)) + "::" + Optional(_ipv6_part + (':' + _ipv6_part)*(0,6))).setName("short IPv6 address")
+    _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8)
+    _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address")
+    ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address")
+    "IPv6 address (long, short, or mixed form)"
+    
+    mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address")
+    "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)"
+
+    @staticmethod
+    def convertToDate(fmt="%Y-%m-%d"):
+        """
+        Helper to create a parse action for converting parsed date string to Python datetime.date
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%d"})
+
+        Example::
+            date_expr = pyparsing_common.iso8601_date.copy()
+            date_expr.setParseAction(pyparsing_common.convertToDate())
+            print(date_expr.parseString("1999-12-31"))
+        prints::
+            [datetime.date(1999, 12, 31)]
+        """
+        def cvt_fn(s,l,t):
+            try:
+                return datetime.strptime(t[0], fmt).date()
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    @staticmethod
+    def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"):
+        """
+        Helper to create a parse action for converting parsed datetime string to Python datetime.datetime
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%dT%H:%M:%S.%f"})
+
+        Example::
+            dt_expr = pyparsing_common.iso8601_datetime.copy()
+            dt_expr.setParseAction(pyparsing_common.convertToDatetime())
+            print(dt_expr.parseString("1999-12-31T23:59:59.999"))
+        prints::
+            [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]
+        """
+        def cvt_fn(s,l,t):
+            try:
+                return datetime.strptime(t[0], fmt)
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    iso8601_date = Regex(r'(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?').setName("ISO8601 date")
+    "ISO8601 date (C{yyyy-mm-dd})"
+
+    iso8601_datetime = Regex(r'(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime")
+    "ISO8601 datetime (C{yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)}) - trailing seconds, milliseconds, and timezone optional; accepts separating C{'T'} or C{' '}"
+
+    uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID")
+    "UUID (C{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx})"
+
+    _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress()
+    @staticmethod
+    def stripHTMLTags(s, l, tokens):
+        """
+        Parse action to remove HTML tags from web page HTML source
+
+        Example::
+            # strip HTML links from normal text 
+            text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'
+            td,td_end = makeHTMLTags("TD")
+            table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end
+            
+            print(table_text.parseString(text).body) # -> 'More info at the pyparsing wiki page'
+        """
+        return pyparsing_common._html_stripper.transformString(tokens[0])
+
+    _commasepitem = Combine(OneOrMore(~Literal(",") + ~LineEnd() + Word(printables, excludeChars=',') 
+                                        + Optional( White(" \t") ) ) ).streamline().setName("commaItem")
+    comma_separated_list = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("comma separated list")
+    """Predefined expression of 1 or more printable words or quoted strings, separated by commas."""
+
+    upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper()))
+    """Parse action to convert tokens to upper case."""
+
+    downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower()))
+    """Parse action to convert tokens to lower case."""
+
+
+if __name__ == "__main__":
+
+    selectToken    = CaselessLiteral("select")
+    fromToken      = CaselessLiteral("from")
+
+    ident          = Word(alphas, alphanums + "_$")
+
+    columnName     = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    columnNameList = Group(delimitedList(columnName)).setName("columns")
+    columnSpec     = ('*' | columnNameList)
+
+    tableName      = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    tableNameList  = Group(delimitedList(tableName)).setName("tables")
+    
+    simpleSQL      = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables")
+
+    # demo runTests method, including embedded comments in test string
+    simpleSQL.runTests("""
+        # '*' as column list and dotted table name
+        select * from SYS.XYZZY
+
+        # caseless match on "SELECT", and casts back to "select"
+        SELECT * from XYZZY, ABC
+
+        # list of column names, and mixed case SELECT keyword
+        Select AA,BB,CC from Sys.dual
+
+        # multiple tables
+        Select A, B, C from Sys.dual, Table2
+
+        # invalid SELECT keyword - should fail
+        Xelect A, B, C from Sys.dual
+
+        # incomplete command - should fail
+        Select
+
+        # invalid column name - should fail
+        Select ^^^ frox Sys.dual
+
+        """)
+
+    pyparsing_common.number.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    # any int or real number, returned as float
+    pyparsing_common.fnumber.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    pyparsing_common.hex_integer.runTests("""
+        100
+        FF
+        """)
+
+    import uuid
+    pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+    pyparsing_common.uuid.runTests("""
+        12345678-1234-5678-1234-567812345678
+        """)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/six.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/six.py
new file mode 100644
index 0000000..190c023
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/_vendor/six.py
@@ -0,0 +1,868 @@
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+# Copyright (c) 2010-2015 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.10.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        if value is None:
+            value = tp()
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    raise tp, value, tb
+""")
+
+
+if sys.version_info[:2] == (3, 2):
+    exec_("""def raise_from(value, from_value):
+    if from_value is None:
+        raise value
+    raise value from from_value
+""")
+elif sys.version_info[:2] > (3, 2):
+    exec_("""def raise_from(value, from_value):
+    raise value from from_value
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        def wrapper(f):
+            f = functools.wraps(wrapped, assigned, updated)(f)
+            f.__wrapped__ = wrapped
+            return f
+        return wrapper
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/extern/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/extern/__init__.py
new file mode 100644
index 0000000..c1eb9e9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/extern/__init__.py
@@ -0,0 +1,73 @@
+import sys
+
+
+class VendorImporter:
+    """
+    A PEP 302 meta path importer for finding optionally-vendored
+    or otherwise naturally-installed packages from root_name.
+    """
+
+    def __init__(self, root_name, vendored_names=(), vendor_pkg=None):
+        self.root_name = root_name
+        self.vendored_names = set(vendored_names)
+        self.vendor_pkg = vendor_pkg or root_name.replace('extern', '_vendor')
+
+    @property
+    def search_path(self):
+        """
+        Search first the vendor package then as a natural package.
+        """
+        yield self.vendor_pkg + '.'
+        yield ''
+
+    def find_module(self, fullname, path=None):
+        """
+        Return self when fullname starts with root_name and the
+        target module is one vendored through this importer.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        if root:
+            return
+        if not any(map(target.startswith, self.vendored_names)):
+            return
+        return self
+
+    def load_module(self, fullname):
+        """
+        Iterate over the search path to locate and load fullname.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        for prefix in self.search_path:
+            try:
+                extant = prefix + target
+                __import__(extant)
+                mod = sys.modules[extant]
+                sys.modules[fullname] = mod
+                # mysterious hack:
+                # Remove the reference to the extant package/module
+                # on later Python versions to cause relative imports
+                # in the vendor package to resolve the same modules
+                # as those going through this importer.
+                if prefix and sys.version_info > (3, 3):
+                    del sys.modules[extant]
+                return mod
+            except ImportError:
+                pass
+        else:
+            raise ImportError(
+                "The '{target}' package is required; "
+                "normally this is bundled with this package so if you get "
+                "this warning, consult the packager of your "
+                "distribution.".format(**locals())
+            )
+
+    def install(self):
+        """
+        Install this importer into sys.meta_path if not already present.
+        """
+        if self not in sys.meta_path:
+            sys.meta_path.append(self)
+
+
+names = 'packaging', 'pyparsing', 'six', 'appdirs'
+VendorImporter(__name__, names).install()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/extern/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/extern/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..d06026f
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/extern/__pycache__/__init__.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/pkg_resources/py31compat.py b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/py31compat.py
new file mode 100644
index 0000000..a381c42
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pkg_resources/py31compat.py
@@ -0,0 +1,23 @@
+import os
+import errno
+import sys
+
+from .extern import six
+
+
+def _makedirs_31(path, exist_ok=False):
+    try:
+        os.makedirs(path)
+    except OSError as exc:
+        if not exist_ok or exc.errno != errno.EEXIST:
+            raise
+
+
+# rely on compatibility behavior until mode considerations
+#  and exists_ok considerations are disentangled.
+# See https://github.com/pypa/setuptools/pull/1083#issuecomment-315168663
+needs_makedirs = (
+    six.PY2 or
+    (3, 4) <= sys.version_info < (3, 4, 1)
+)
+makedirs = _makedirs_31 if needs_makedirs else os.makedirs
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/LICENSE b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/LICENSE
new file mode 100644
index 0000000..fcc6795
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [2020] [Thomas S Hatch]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/METADATA
new file mode 100644
index 0000000..a3569b3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/METADATA
@@ -0,0 +1,122 @@
+Metadata-Version: 2.1
+Name: pop
+Version: 15
+Summary: The Plugin Oriented Programming System
+Home-page: https://saltstack.com
+Author: Thomas S Hatch
+Author-email: thatch@saltstack.com
+License: UNKNOWN
+Platform: UNKNOWN
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Development Status :: 5 - Production/Stable
+Requires-Python: >=3.6
+Requires-Dist: pop-config (>=6.11)
+Requires-Dist: dict-toolbox
+Requires-Dist: PyYAML
+Requires-Dist: msgpack
+
+====
+POP
+====
+
+Pop is used to express the Plugin Oriented Programming Paradigm. The Plugin
+Oriented Programming Paradigm has been designed to make pluggable software
+easy to write and easy to extend.
+
+Plugin Oriented Programming presents a new way to scale development teams
+and deliver complex software. This is done by making the applications entirely
+out of plugins, and also making the applications themselves natively pluggable
+with each other.
+
+Using Plugin Oriented Programming it then becomes easy to have the best of both
+worlds, software can be build in small pieces, making development easier to
+maintain. But the small pieces can then be merged and deployed in a single
+binary, making code deployment easy as well.
+
+All this using Python, one of the world's most popular and powerful programming
+language.
+
+Getting Started
+===============
+
+A more complete Getting Started Guide is available inside of the documentation
+for `pop`. The best place to start is in the doc's Getting Started Guide found
+here:
+
+https://pop.readthedocs.io
+
+First off, install `pop` from pypi:
+
+.. code-block:: bash
+
+    pip3 install pop
+
+Now that you have `pop`, use the tool that `pop` ships with to bootstrap your
+project! This tool is called `pop-seed` and it will make your Python project
+boiler plate for you!
+
+.. code-block:: bash
+
+    mkdir poppy
+    cd poppy
+    pop-seed poppy
+
+Now you have a `setup.py` file will detect changes to you project and "Just Work".
+Feel free to open it up and fill in some of the blank places, like author name,
+description, etc. The `pop-seed` program also made your first directories, your
+`run.py` startup script, everything you need to install your project and the `pop`
+`conf.py` file used to load in configuration. Running `pop-seed` also made a few
+other files, but nothing to worry about now.
+
+Congratulations! You have a `pop` project! Now you can run the project:
+
+.. code-block:: bash
+
+    python3 run.py
+
+With a project up and running you can now add more plugins, more code and more
+plugin subsystems!
+
+What Happened?
+==============
+
+Take a look at the `poppy/poppy/init.py` file, your little `run.py` script
+created the `hub`, loaded your first plugin subsystem, `poppy` and called
+the run function therein. This is the starting point for your app.
+
+Next dive into the `pop` documentation, we will take you through how to
+think in Plugin Oriented Programming, helping you see a new way to write
+code that is more flexible and dynamic than anything you have seen before!
+
+Single Binary
+=============
+
+In the first few sentences of this document I promised you a single binary!
+This is easy to do! Just pip install `tiamat`:
+
+.. code-block:: bash
+
+    pip install tiamat
+    tiamat -n poppy
+
+This will build a single binary of your program! If something goes wrong it
+is most likely because PyInstaller does not support the latest version of
+Python yet. To fix this you can usually just run `tiamat` with the
+`--dev-pyinst` to build the binary with the latest development snapshot
+of PyInstaller.
+
+Documentation
+=============
+
+Check out the docs at:
+
+https://pop.readthedocs.io
+
+There is a much more in depth tutorial here, followed by documents on how to
+think in Plugin Oriented Programming. Take your time to read it, it is not long
+and can change how you look at writing software!
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/RECORD
new file mode 100644
index 0000000..9eca0a4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/RECORD
@@ -0,0 +1,86 @@
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/WHEEL
new file mode 100644
index 0000000..b552003
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/entry_points.txt b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/entry_points.txt
new file mode 100644
index 0000000..15f34f6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/entry_points.txt
@@ -0,0 +1,3 @@
+[console_scripts]
+pop-seed = pop.scripts:pop_seed
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/top_level.txt
new file mode 100644
index 0000000..7fffa4d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop-15.dist-info/top_level.txt
@@ -0,0 +1 @@
+pop
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/__init__.py b/python3-vckonline/lib/python3.8/site-packages/pop/__init__.py
new file mode 100644
index 0000000..40a96af
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/__init__.py
@@ -0,0 +1 @@
+# -*- coding: utf-8 -*-
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pop/__pycache__/__init__.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/__pycache__/version.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pop/__pycache__/version.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/contract.py b/python3-vckonline/lib/python3.8/site-packages/pop/contract.py
new file mode 100644
index 0000000..f49f2a3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/contract.py
@@ -0,0 +1,298 @@
+# -*- coding: utf-8 -*-
+"""
+Contracts to enforce loader objects
+"""
+
+# Import python libs
+import asyncio
+import functools
+import inspect
+import os
+from collections import namedtuple
+from types import ModuleType
+from typing import Dict, Iterable, List
+
+# Import pop libs
+import pop.exc
+import pop.hub
+import pop.verify
+
+
+class ContractedContext(
+    namedtuple(
+        "ContractedContext",
+        ("func", "args", "kwargs", "signature", "ret", "cache", "ref"),
+    )
+):
+    """
+    Contracted function calling context
+    """
+
+    def __new__(
+        cls,
+        func: functools.partial,
+        args: Iterable,
+        kwargs: Dict,
+        signature,
+        ref,
+        ret=None,
+        cache=None,
+    ):  # pylint: disable=too-many-arguments
+        if cache is None:
+            cache = {}
+        return super(ContractedContext, cls).__new__(
+            cls, func, list(args), kwargs, signature, ret, cache, ref
+        )
+
+    def get_argument(self, name):
+        """
+        Return the value corresponding to a function argument after binding the contract context
+        argument and keyword arguments to the function signature.
+        """
+        return self.get_arguments()[name]
+
+    def get_arguments(self):
+        """
+        Return a dictionary of all arguments that will be passed to the function and their
+        values, including default arguments.
+        """
+        if "__bound_signature__" not in self.cache:
+            try:
+                self.cache["__bound_signature__"] = self.signature.bind(
+                    *self.args, **self.kwargs
+                )
+            except TypeError as e:
+                for frame in inspect.trace(0):
+                    if frame.function == "bind" and frame.filename.endswith(
+                        os.sep + "inspect.py"
+                    ):
+                        raise pop.exc.BindError(e)
+                raise
+            # Apply any default values from the signature
+            self.cache["__bound_signature__"].apply_defaults()
+        return self.cache["__bound_signature__"].arguments
+
+
+def load_contract(
+    contracts: List["Contracted"],
+    default_contracts: List[str],
+    mod: ModuleType,
+    name: str,
+) -> List:
+    """
+    return a Contract object loaded up
+    Dynamically create the correct Contracted type
+    :param contracts: Contracts functions to add to the sub
+    :param default_contracts: The contracts that have been marked as defaults
+    :param mod: A loader module
+    :param name: The name of the module to get from the loader
+    """
+    raws = []
+    if not contracts:
+        return raws
+    loaded_contracts = []
+    if hasattr(contracts, name):
+        loaded_contracts.append(name)
+        raws.append(getattr(contracts, name))
+    if hasattr(contracts, "init"):
+        loaded_contracts.append("init")
+        raws.append(getattr(contracts, "init"))
+    if default_contracts:
+        for contract in default_contracts:
+            if contract in loaded_contracts:
+                continue
+            loaded_contracts.append(contract)
+            raws.append(getattr(contracts, contract))
+    if hasattr(mod, "__contracts__"):
+        cnames = getattr(mod, "__contracts__")
+        if not isinstance(cnames, (list, tuple)):
+            cnames = cnames.split(",")
+        for cname in cnames:
+            if cname in contracts:
+                if cname in loaded_contracts:
+                    continue
+                loaded_contracts.append(cname)
+                raws.append(getattr(contracts, cname))
+    return raws
+
+
+class Wrapper:
+    def __init__(self, func: functools.partial, ref: str, name: str):
+        """
+        :param func: The contracted function to call
+        :param ref: The reference to the function on the hub
+        :param name: An alias for the function
+        """
+        self.__dict__.update(
+            getattr(func, "__dict__", {})
+        )  # do this first so we later overwrite any conflicts
+        self.func = func
+        self.ref = ref
+        self.__name__ = name
+        self.signature = inspect.signature(self.func)
+        self._sig_errors = []
+        self.__wrapped__ = func
+
+    def __call__(self, *args, **kwargs):
+        self.func(*args, **kwargs)
+
+    def __repr__(self):
+        return "<{} func={}.{}>".format(
+            self.__class__.__name__, self.func.__module__, self.__name__
+        )
+
+
+class Contracted(Wrapper):
+    """
+    This class wraps functions that have a contract associated with them
+    and executes the contract routines
+    """
+
+    def __init__(
+        self,
+        hub: "pop.hub.Hub",
+        contracts: List[Wrapper],
+        func: functools.partial,
+        ref: str,
+        name: str,
+    ):
+        super().__init__(func, ref, name)
+        self.hub = hub
+        self.contracts = contracts or []
+        self._load_contracts()
+
+    def _get_contracts_by_type(self, contract_type: str = "pre") -> List[Wrapper]:
+        """
+        :param contract_type: One of "call", "pre", "post", or "sig"
+        """
+        matches = []
+        fn_contract_name = "{}_{}".format(contract_type, self.__name__)
+        for contract in self.contracts:
+            if hasattr(contract, fn_contract_name):
+                matches.append(getattr(contract, fn_contract_name))
+            if hasattr(contract, contract_type):
+                matches.append(getattr(contract, contract_type))
+
+        return matches
+
+    def _load_contracts(self):
+        # TODO:
+        # if Contracted - only allow regular pre/post
+        # if ContractedAsync - allow coroutines and functions
+        # if ContractedAsyncGen - allow coroutines and functions
+
+        self.contract_functions = {
+            "pre": self._get_contracts_by_type("pre"),
+            "call": self._get_contracts_by_type("call")[:1],
+            "post": self._get_contracts_by_type("post"),
+        }
+        # TODO: write test for stack-like behavior (reverse "pre")
+        self._has_contracts = (
+            sum([len(l) for l in self.contract_functions.values()]) > 0
+        )
+
+    def __call__(self, *args, **kwargs):
+        args = (self.hub,) + args
+        if not self._has_contracts:
+            return self.func(*args, **kwargs)
+        contract_context = ContractedContext(
+            self.func, args, kwargs, self.signature, self.ref
+        )
+
+        for fn in self.contract_functions["pre"]:
+            fn(contract_context)
+        if self.contract_functions["call"]:
+            ret = self.contract_functions["call"][0](contract_context)
+        else:
+            ret = self.func(*contract_context.args, **contract_context.kwargs)
+        for fn in self.contract_functions["post"]:
+            post_ret = fn(contract_context._replace(ret=ret))
+            if post_ret is not None:
+                ret = post_ret
+
+        return ret
+
+
+class ContractedAsyncGen(Contracted):
+    async def __call__(self, *args, **kwargs):
+        args = (self.hub,) + args
+        if not self._has_contracts:
+            async for chunk in self.func(*args, **kwargs):
+                yield chunk
+            return
+        contract_context = ContractedContext(
+            self.func, args, kwargs, self.signature, self.ref
+        )
+
+        for fn in self.contract_functions["pre"]:
+            pre_ret = fn(contract_context)
+            if asyncio.iscoroutine(pre_ret):
+                await pre_ret
+        chunk = None
+        if self.contract_functions["call"]:
+            async for chunk in self.contract_functions["call"][0](contract_context):
+                yield chunk
+        else:
+            async for chunk in self.func(
+                *contract_context.args, **contract_context.kwargs
+            ):
+                yield chunk
+        ret = chunk
+        for fn in self.contract_functions["post"]:
+            if isinstance(fn, ContractedAsync):
+                post_ret = await fn(contract_context._replace(ret=ret))
+            else:
+                post_ret = fn(contract_context._replace(ret=ret))
+            if post_ret is not None:
+                ret = post_ret
+
+
+class ContractedAsync(Contracted):
+    async def __call__(self, *args, **kwargs):
+        args = (self.hub,) + args
+        if not self._has_contracts:
+            return await self.func(*args, **kwargs)
+        contract_context = ContractedContext(
+            self.func, args, kwargs, self.signature, self.ref
+        )
+
+        for fn in self.contract_functions["pre"]:
+            pre_ret = fn(contract_context)
+            if asyncio.iscoroutine(pre_ret):
+                await pre_ret
+        if self.contract_functions["call"]:
+            ret = await self.contract_functions["call"][0](contract_context)
+        else:
+            ret = await self.func(*contract_context.args, **contract_context.kwargs)
+        for fn in self.contract_functions["post"]:
+            if isinstance(fn, ContractedAsync):
+                post_ret = await fn(contract_context._replace(ret=ret))
+            else:
+                post_ret = fn(contract_context._replace(ret=ret))
+            if post_ret is not None:
+                ret = post_ret
+
+        return ret
+
+
+def create_contracted(
+    hub: "pop.hub.Hub",
+    contracts: List[Wrapper],
+    func: functools.partial,
+    ref: str,
+    name: str,
+) -> Contracted:
+    """
+    Dynamically create the correct Contracted type
+    :param hub: The redistributed pop central hub
+    :param contracts: Contracts functions to add to the sub
+    :param func: The contracted function to call
+    :param ref: The reference to the function on the hub
+    :param name: The name of the module to get from the loader
+    """
+    if asyncio.iscoroutinefunction(func):
+        return ContractedAsync(hub, contracts, func, ref, name)
+    elif inspect.isasyncgenfunction(func):
+        return ContractedAsyncGen(hub, contracts, func, ref, name)
+    else:
+        return Contracted(hub, contracts, func, ref, name)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/dicts.py b/python3-vckonline/lib/python3.8/site-packages/pop/dicts.py
new file mode 100644
index 0000000..3d15c93
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/dicts.py
@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+"""
+Tools to work with dicts
+"""
+import dict_tools.update
+import dict_tools.data
+import warnings
+
+__virtualname__ = "dicts"
+
+
+def update(*args, **kwargs):
+    warnings.warn("Use `dict_tools.update.update()` instead", DeprecationWarning)
+    return dict_tools.update.update(*args, **kwargs)
+
+
+def traverse(*args, **kwargs):
+    warnings.warn(
+        "Use `dict_tools.data.traverse_dict_and_list()` instead", DeprecationWarning
+    )
+    return dict_tools.data.traverse_dict_and_list(*args, **kwargs)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/dirs.py b/python3-vckonline/lib/python3.8/site-packages/pop/dirs.py
new file mode 100644
index 0000000..9a5e029
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/dirs.py
@@ -0,0 +1,113 @@
+# -*- coding: utf-8 -*-
+"""
+Find directories
+"""
+# Import pop libs
+import pop.dicts
+
+# Import python libs
+import os
+import sys
+import importlib
+from typing import Any, Dict, Iterable, List
+
+
+def dir_list(
+    subname: str, p_name: str, pypath: List[str] = None, static: List[str] = None
+) -> List[str]:
+    """
+    Return the directories to look for modules in, pypath specifies files
+    relative to an installed python package, static is for static dirs
+    :param subname: ignored
+    :param p_name: ignored
+    :param pypath: One or many python paths which will be imported
+    :param static: Directories that can be explicitly passed
+    """
+    ret = []
+    for path in pypath:
+        mod = importlib.import_module(path)
+        for m_path in mod.__path__:
+            # If we are inside of an executable the path will be different
+            ret.append(m_path)
+    ret.extend(static)
+    return ret
+
+
+def inline_dirs(dirs: Iterable[str], subdir: str) -> List[str]:
+    """
+    Look for the named subdir in the list of dirs
+    :param dirs: The names of configured dynamic dirs
+    :param subdir: The name of the subdir to check for in the list of dynamic dirs
+    :return An extended list of dirs that includes the found subdirs
+    """
+    ret = []
+    for dir_ in dirs:
+        check = os.path.join(dir_, subdir)
+        if os.path.isdir(check):
+            ret.append(check)
+    return ret
+
+
+def dynamic_dirs() -> Dict[str, Any]:
+    """
+    Iterate over the available python package imports and look for configured
+    dynamic dirs
+    """
+    dirs = []
+    ret = {}
+    for dir_ in sys.path:
+        if not os.path.isdir(dir_):
+            continue
+        for sub in os.listdir(dir_):
+            full = os.path.join(dir_, sub)
+            if full.endswith(".egg-link"):
+                with open(full) as rfh:
+                    dirs.append(rfh.read().strip())
+            if os.path.isdir(full):
+                dirs.append(full)
+    for dir_ in dirs:
+        conf = os.path.join(dir_, "conf.py")
+        context = {}
+        if not os.path.isfile(conf):
+            continue
+        try:
+            with open(conf) as f:
+                code = f.read()
+                if "DYNE" in code:
+                    exec(code, context)
+                else:
+                    continue
+        except Exception:
+            continue
+        if "DYNE" in context:
+            if not isinstance(context["DYNE"], dict):
+                continue
+            for name, paths in context["DYNE"].items():
+                if not isinstance(paths, list):
+                    continue
+                if name not in ret:
+                    ret[name] = {
+                        "paths": [],
+                        "CONFIG": {},
+                        "CLI_CONFIG": {},
+                        "SUBCOMMANDS": {},
+                    }
+                if "CONFIG" in context:
+                    pop.dicts.update(ret[name]["CONFIG"], context["CONFIG"])
+                if "CLI_CONFIG" in context:
+                    pop.dicts.update(ret[name]["CLI_CONFIG"], context["CLI_CONFIG"])
+                if "SUBCOMMANDS" in context:
+                    pop.dicts.update(ret[name]["SUBCOMMANDS"], context["SUBCOMMANDS"])
+                for path in paths:
+                    ref = os.path.join(dir_, path.replace(".", os.sep))
+                    if dir_.endswith(name):
+                        ret[name]["paths"].insert(0, ref)
+                    else:
+                        ret[name]["paths"].append(ref)
+    for name in ret:
+        if not ret[name]:
+            continue
+        first = ret[name]["paths"].pop(0)
+        ret[name]["paths"] = sorted(ret[name]["paths"])
+        ret[name]["paths"].insert(0, first)
+    return ret
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/exc.py b/python3-vckonline/lib/python3.8/site-packages/pop/exc.py
new file mode 100644
index 0000000..26d769e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/exc.py
@@ -0,0 +1,62 @@
+# -*- coding: utf-8 -*-
+"""
+Pop related exceptions
+"""
+
+
+class PopBaseException(Exception):
+    """
+    Base exception where all of Pop's exceptions derive
+    """
+
+
+class PopError(PopBaseException):
+    """
+    General purpose pop exception to signal an error
+    """
+
+
+class PopLoadError(PopBaseException):
+    """
+    Exception raised when a pop module fails to load
+    """
+
+
+class PopLookupError(PopBaseException):
+    """
+    Exception raised when a pop module lookup fails
+    """
+
+
+class ContractModuleException(PopBaseException):
+    """
+    Exception raised when a function specified in a contract as required
+    to exist is not found in the loaded module
+    """
+
+
+class ContractFuncException(PopBaseException):
+    """
+    Exception raised when a function specified in a contract as required
+    to exist is found on the module but it's not function
+    """
+
+
+class ContractSigException(PopBaseException):
+    """
+    Exception raised when a function signature is not compatible with the
+    coresponding function signature found in the contract.
+    """
+
+
+class ProcessNotStarted(PopBaseException):
+    """
+    Exception raised when failing to start a process on the process manager
+    """
+
+
+class BindError(PopBaseException):
+    """
+    Exception raised when arguments for a function in a ContractedContext cannot be bound
+    Indicates invalid function arguments.
+    """
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/hub.py b/python3-vckonline/lib/python3.8/site-packages/pop/hub.py
new file mode 100644
index 0000000..f42ec76
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/hub.py
@@ -0,0 +1,528 @@
+# -*- coding: utf-8 -*-
+
+# Import python libs
+import os
+import importlib.machinery
+import inspect
+import logging
+import secrets
+import sys
+
+# Import pop libs
+import pop.dirs
+import pop.scanner
+import pop.loader
+import pop.exc
+import pop.contract
+import pop.verify
+
+from typing import Any, Dict, List, Tuple, Iterator
+from types import ModuleType
+
+EXT_SUFFIXES = tuple(importlib.machinery.EXTENSION_SUFFIXES)
+log = logging.getLogger(__name__)
+
+
+def ex_path(path: str) -> List[str]:
+    """
+    Take a path that is sent to the Sub and expand it if it is a string or not
+    """
+    if path is None:
+        return []
+    elif isinstance(path, str):
+        return path.split(",")
+    elif isinstance(path, list):
+        return path
+    return []
+
+
+class Hub:
+    """
+    The redistributed pop central hub. All components of the system are
+    rooted to the Hub.
+    """
+
+    def __init__(self):
+        self._subs = {}
+        self._sub_alias = {}
+        self._dynamic = {}
+        self._dscan = False
+        # Add the pop sub to the hub, this should always use pypath and
+        # Should never be made dynamic. This is a core system sub and should
+        # NOT be app-merged
+        self._subs["pop"] = Sub(self, "pop", pypath="pop.mods.pop")
+        self._iter_subs = sorted(self._subs.keys())
+        self._iter_ind = 0
+        # Set up the conf OPT structure so it is always available
+        self.OPT = {}
+
+    def __getstate__(self) -> Dict:
+        return dict(_subs=self._subs)
+
+    def __setstate__(self, state: Dict):
+        self.__dict__.update(state)
+
+    def __iter__(self) -> Iterator["Sub"]:
+        def iter(subs: Dict[str, Sub]):
+            for sub in sorted(subs.keys()):
+                yield subs[sub]
+
+        return iter(self._subs)
+
+    def _resolve_this(self, levels: int) -> "Hub":
+        """
+        This function allows for hub to pop introspective calls.
+        This should only ever be called from within a hub module, otherwise
+        it should stack trace, or return heaven knows what...
+        :param levels: The number of frames to search for a hub reference
+        """
+        if hasattr(
+            sys, "_getframe"
+        ):  # implementation detail of CPython, speeds up things by 100x.
+            desired_frame = sys._getframe(3)
+            contracted = desired_frame.f_locals["self"]
+        else:
+            call_frame = inspect.stack(0)[3]
+            contracted = call_frame[0].f_locals["self"]
+        ref = contracted.ref.split(".")
+
+        # (0=module, 1=module's parent etc.)
+        level_offset = levels - 1
+        traversed = self
+        for i in range(len(ref) - level_offset):
+            traversed = getattr(traversed, ref[i])
+        return traversed
+
+    def _remove_subsystem(self, subname: str) -> bool:
+        """
+        Remove the named subsystem
+        :param subname: The name of a subsystem to remove
+        :return True if the subsystem was successfully removed, else False
+        """
+        if subname in self._subs:
+            # Remove the subsystem
+            self._subs.pop(subname)
+            # reset the iterator
+            self._iter_subs = sorted(self._subs.keys())
+            self._iter_ind = 0
+            return True
+        return False
+
+    def _scan_dynamic(self):
+        """
+        Refresh the dynamic roots data used for loading app merge module roots
+        """
+        self._dynamic = pop.dirs.dynamic_dirs()
+        self._dscan = True
+
+    def __getattr__(self, item: str):
+        if item.startswith("_"):
+            if item == item[0] * len(item):
+                return self._resolve_this(len(item))
+            else:
+                return self.__getattribute__(item)
+        if "." in item:
+            return self.pop.ref.last(item)
+        if item in self._subs:
+            return self._subs[item]
+        elif item in self._sub_alias:
+            resolved = self._sub_alias[item]
+            if resolved in self._subs:
+                return self._subs[resolved]
+        return self.__getattribute__(item)
+
+
+class Sub:
+    """
+    The pop object that contains the loaded module data
+    """
+
+    def __init__(
+        self,
+        hub: Hub,
+        subname: str,
+        root: Hub or Sub = None,
+        pypath: List[str] or str = None,
+        static: List[str] or str = None,
+        contracts_pypath: List[str] or str = None,
+        contracts_static: List[str] or str = None,
+        default_contracts: List[str] or str = None,
+        virtual: bool = True,
+        dyne_name: str = None,
+        omit_start: Tuple[str] = ("_",),
+        omit_end: Tuple[str] = (),
+        omit_func: bool = False,
+        omit_class: bool = False,
+        omit_vars: bool = False,
+        mod_basename: str = "",
+        stop_on_failures: bool = False,
+        init: bool = True,
+        is_contract: bool = False,
+        sub_virtual: bool = True,
+        recursive_contracts_static=None,
+        default_recursive_contracts=None,
+    ):
+        """
+        :param hub: The redistributed pop central hub
+        :param subname: The name that the sub is going to take on the hub
+            if nothing else is passed, it is used as the pypath (TODO make it the dyne_name not the pypath)
+        :param pypath: One or many python paths which will be imported
+        :param static: Directories that can be explicitly passed
+        :param contracts_pypath: Load additional contract paths
+        :param contracts_static: Load additional contract paths from a specific directory
+        :param default_contracts: Specifies that a specific contract plugin will be applied as a default to all plugins
+        :param virtual: Toggle whether or not to process __virtual__ functions
+        :param dyne_name: The dynamic name to use to look up paths to find plugins -- linked to conf.py
+        :param omit_start: Allows you to pass in a tuple of characters that would omit the loading of any object
+            I.E. Any function starting with an underscore will not be loaded onto a plugin
+            (You should probably never change this)
+        :param omit_end:Allows you to pass in a tuple of characters that would omit the loading of an object
+            (You should probably never change this)
+        :param omit_func: bool: Don't load any functions
+        :param omit_class: bool: Don't load any classes
+        :param omit_vars: bool: Don't load any vars
+        :param mod_basename: str: Manipulate the location in sys.modules that the plugin will be loaded to.
+            Allow plugins to be loaded into a separate namespace.
+        :param stop_on_failures: If any module fails to load for any reason, stacktrace and do not continue loading this sub
+        :param init: bool: determine whether or not we process __init__ functions
+        :param is_contract: Specify whether or not this sub is a contract
+        :param sub_virtual: bool: Recursively ignore this sub and it's subs
+        """
+        self._iter_ind = 0
+        self._hub = hub
+        self._root = root or hub
+        self._subs = {}
+        self._alias = []
+        self._sub_alias = {}
+        self._subname = subname
+        self._pypath = ex_path(pypath)
+        self._static = ex_path(static)
+        self._contracts_pypath = ex_path(contracts_pypath)
+        self._contracts_static = ex_path(contracts_static)
+        self._recursive_contracts_static = ex_path(recursive_contracts_static)
+        if isinstance(default_contracts, str):
+            default_contracts = [default_contracts]
+        if isinstance(default_recursive_contracts, str):
+            default_recursive_contracts = [default_recursive_contracts]
+        self._default_recursive_contracts = default_recursive_contracts or []
+        self._default_contracts = default_contracts or ()
+        self._dyne_name = dyne_name
+        self._virtual = virtual
+        self._omit_start = omit_start
+        self._sub_virtual = sub_virtual
+        self._omit_end = omit_end
+        self._omit_func = omit_func
+        self._omit_class = omit_class
+        self._omit_vars = omit_vars
+        self._mod_basename = mod_basename
+        self._stop_on_failures = stop_on_failures
+        self._is_contract = is_contract
+        self._process_init = init
+        self._prepare()
+
+    def _prepare(self):
+        self._dirs = pop.dirs.dir_list(
+            self._subname, "mods", self._pypath, self._static,
+        )
+        if self._dyne_name:
+            self._load_dyne()
+        self._contract_dirs = pop.dirs.dir_list(
+            self._subname, "contracts", self._contracts_pypath, self._contracts_static,
+        )
+        self._contract_dirs.extend(pop.dirs.inline_dirs(self._dirs, "contracts"))
+        self._recursive_contract_dirs = pop.dirs.dir_list(
+            self._subname, "recursive_contracts", [], self._recursive_contracts_static,
+        )
+        self._recursive_contract_dirs.extend(
+            pop.dirs.inline_dirs(self._dirs, "recursive_contracts")
+        )
+
+        if self._contract_dirs:
+            self._contracts = Sub(
+                self._hub,
+                f"{self._subname}.contracts",
+                static=self._contract_dirs,
+                is_contract=True,
+            )
+        else:
+            self._contracts = None
+
+        if self._recursive_contract_dirs:
+            self._recursive_contracts = Sub(
+                self._hub,
+                f"{self._subname}.recursive_contracts",
+                static=self._recursive_contract_dirs,
+                is_contract=True,
+            )
+        else:
+            self._recursive_contracts = getattr(
+                self._root, "_recursive_contracts", None
+            )
+        self._name_root = self._load_name_root()
+        self._scan = pop.scanner.scan(self._dirs)
+        self._loaded = {}
+        self._vmap = {}
+        self._load_errors = {}
+        self._loaded_all = False
+
+    def _load_dyne(self):
+        """
+        Load up the dynamic dirs for this sub
+        """
+        if not self._hub._dscan:
+            self._hub._scan_dynamic()
+        for path in self._hub._dynamic.get(self._dyne_name, {}).get("paths", []):
+            self._dirs.append(path)
+
+    def _load_name_root(self):
+        """
+        Generate the root of the name to be used to apply to the loaded modules
+        """
+        if self._pypath:
+            return self._pypath[0]
+        elif self._dirs:
+            return secrets.token_hex()
+
+    def __getstate__(self):
+        return dict(
+            _hub=self._hub,
+            _subname=self._subname,
+            _pypath=self._pypath,
+            _static=self._static,
+            _contracts_pypath=self._contracts_pypath,
+            _contracts_static=self._contracts_static,
+            _default_contracts=self._default_contracts,
+            _virtual=self._virtual,
+            _omit_start=self._omit_start,
+            _omit_end=self._omit_end,
+            _omit_func=self._omit_func,
+            _omit_class=self._omit_class,
+            _omit_vars=self._omit_vars,
+            _mod_basename=self._mod_basename,
+            _stop_on_failures=self._stop_on_failures,
+        )
+
+    def __setstate__(self, state: Dict):
+        self.__dict__.update(state)
+        self._prepare()
+
+    def __getattr__(self, item: str):
+        """
+        If the item should be loaded, load it, else serve it
+        """
+        if item.startswith("_"):
+            return self.__getattribute__(item)
+        if "." in item:
+            return self._hub.pop.ref.last(f"{self._subname}.{item}")
+        if item in self._loaded:
+            ret = self._loaded[item]
+            # If this previously errored on load, try it again,
+            # it might be ready to load now
+            if isinstance(ret, pop.loader.LoadError):
+                ret = self._find_mod(item)
+                if isinstance(ret, pop.loader.LoadError):
+                    # If this is still a LoadError, process it
+                    self._process_load_error(ret)
+            return ret
+        elif item in self._subs:
+            return self._subs[item]
+        elif item in self._sub_alias:
+            resolved = self._sub_alias[item]
+            if resolved in self._subs:
+                return self._subs[resolved]
+
+        mod = self._find_mod(item)
+        if mod is None:
+            raise AttributeError(f"'{self._subname}' has no attribute '{item}'")
+        return mod
+
+    def __contains__(self, item: str):
+        try:
+            return hasattr(self, item)
+        except pop.exc.PopLookupError:
+            return False
+
+    def __iter__(self) -> Iterator["Sub"]:
+        self._load_all()
+
+        def iter(loaded):
+            for l in sorted(loaded.keys()):
+                yield loaded[l]
+
+        return iter(self._loaded)
+
+    def __next__(self) -> "Sub":
+        self._load_all()
+        if self._iter_ind == len(self._iter_keys):
+            self._iter_ind = 0
+            raise StopIteration
+        self._iter_ind += 1
+        return self._loaded[self._iter_keys[self._iter_ind - 1]]
+
+    def _sub_init(self):
+        """
+        Run load init.py for the sub, running '__init__' function if present
+        """
+        self._find_mod("init", match_only=True)
+
+    def _process_load_error(
+        self, mod: ModuleType, skip_full_stop: bool = False
+    ) -> bool:
+        if not isinstance(mod, pop.loader.LoadError):
+            # This is not a LoadError, return now!
+            return False
+
+        if mod.edict["verror"]:
+            error = "{0[msg]}: {0[verror]}".format(mod())
+            if skip_full_stop is False and self._stop_on_failures is True:
+                raise pop.exc.PopError(error)
+            log.info(error)
+            return False
+        error = "{0[msg]}: {0[exception]!r}".format(mod())
+        if mod.traceback:
+            error += "\n" + mod.traceback
+        if skip_full_stop is False and self._stop_on_failures is True:
+            raise pop.exc.PopError(error)
+        if mod.traceback:
+            log.warning(error)
+        else:
+            log.info(error)
+        return True
+
+    def _find_mod(self, item: str, match_only: bool = False) -> Dict:
+        """
+        Find the module named item
+        :param item: The module to search for (then load) from any scanned interface
+        :param match_only: return the loaded module
+        :return a loaded mod_dict
+        """
+        for iface in self._scan:
+            for bname in self._scan[iface]:
+                if os.path.basename(bname) == item:
+                    self._load_item(iface, bname)
+            if item in self._loaded:
+                return self._loaded[item]
+        if not match_only:
+            for iface in self._scan:
+                for bname in self._scan[iface]:
+                    if self._scan[iface][bname].get("loaded"):
+                        continue
+                    self._load_item(iface, bname)
+                    if item in self._loaded:
+                        return self._loaded[item]
+        # Let's see if the module being lookup is in the load errors dictionary
+        if item in self._load_errors:
+            # Return the LoadError
+            return self._load_errors[item]
+
+    def _load_item(self, iface: str, bname: str):
+        """
+        Load the named basename
+        :param iface: A scanned directory type
+        :param bname: The base name of the python path of a module
+        """
+        if iface not in self._scan:
+            raise pop.exc.PopLoadError(
+                "Bad call to load item, no iface {}".format(iface)
+            )
+        if bname not in self._scan[iface]:
+            raise pop.exc.PopLoadError(
+                "Bad call to load item, no bname {} in iface {}".format(bname, iface)
+            )
+        # The mname is the name to give the module in python's sys.modules
+        # This name must be unique for every loaded module, so we use the full
+        # module path sans the file extention
+        mname = self._scan[iface][bname]["path"].replace(os.sep, ".")
+        mname = mname[mname.index(".") + 1 : mname.rindex(".")].strip(".")
+        mod = pop.loader.load_mod(mname, iface, self._scan[iface][bname]["path"],)
+        if self._process_load_error(mod):
+            self._load_errors[os.path.basename(bname)] = mod
+            return
+        self._prep_mod(mod, iface, bname)
+
+    def _process_vret(self, vret: Dict[str, Any]) -> bool:
+        """
+        :param vret: The return from a __virtual__ or __sub_virtual__ function
+        :return: True if there was an error, else false
+        """
+        if "error" in vret:
+            # Virtual Errors should not full stop pop
+            self._process_load_error(vret["error"], skip_full_stop=True)
+            # Store the LoadError under the __virtualname__ if defined
+            self._load_errors[vret["vname"]] = vret["error"]
+            return True
+        else:
+            return False
+
+    def _prep_mod(self, mod: ModuleType, iface: str, bname: str):
+        """
+        Prepare the module!
+        :param mod: A python module containing data
+        :param iface: A scanned directory type
+        :param bname: The base name of the python path of a module
+        """
+        if not self._sub_virtual:
+            return
+        else:
+            vret = pop.loader.load_sub_virtual(self._hub, self._virtual, mod, bname)
+            if self._process_vret(vret):
+                self._sub_virtual = False
+                return
+        vret = pop.loader.load_virtual(self._hub, self._virtual, mod, bname)
+        if self._process_vret(vret):
+            return
+
+        contracts = pop.contract.load_contract(
+            self._contracts, self._default_contracts, mod, vret["name"]
+        )
+        recursive_contracts = set(
+            pop.contract.load_contract(
+                self._recursive_contracts,
+                self._default_recursive_contracts,
+                mod,
+                vret["name"],
+            )
+        )
+        if getattr(self._root, "_recursive_contracts", None):
+            recursive_contracts.update(
+                pop.contract.load_contract(
+                    self._root._recursive_contracts,
+                    self._root._default_recursive_contracts,
+                    mod,
+                    vret["name"],
+                )
+            )
+        recursive_contracts = list(recursive_contracts)
+        name = vret["name"]
+        if name.endswith(EXT_SUFFIXES):
+            for ext in EXT_SUFFIXES:
+                if name.endswith(ext):
+                    name = name.split(ext)[0]
+                    break
+        mod_dict = pop.loader.prep_loaded_mod(
+            self, mod, name, contracts, recursive_contracts
+        )
+        if name != "init":
+            pop.verify.contract(self._hub, contracts + recursive_contracts, mod_dict)
+        self._loaded[name] = mod_dict
+        self._vmap[mod.__file__] = name
+        # Let's mark the module as loaded
+        self._scan[iface][bname]["loaded"] = True
+        if self._process_init:
+            # Now that the module has been added to the sub, call mod_init
+            pop.loader.mod_init(self, mod, name)
+
+    def _load_all(self):
+        """
+        Load all modules found during the scan.
+
+        .. attention:: This completely disables the lazy loader behavior of pop
+        """
+        if self._loaded_all is True:
+            return
+        for iface in self._scan:
+            for bname in self._scan[iface]:
+                if self._scan[iface][bname].get("loaded"):
+                    continue
+                self._load_item(iface, bname)
+        self._loaded_all = True
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/loader.py b/python3-vckonline/lib/python3.8/site-packages/pop/loader.py
new file mode 100644
index 0000000..6aceb3e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/loader.py
@@ -0,0 +1,401 @@
+# -*- coding: utf-8 -*-
+"""
+Load the files detected from the scanner
+"""
+# Import Python libs
+import asyncio
+import os
+import sys
+import inspect
+import importlib
+import importlib.util
+import importlib.machinery
+import traceback as stdlib_traceback
+import types
+from typing import Any, Dict, List, Tuple
+
+# Import pop libs
+import pop.exc
+import pop.contract
+
+
+class LoadError(Exception):
+    """
+    Errors from the loader are contained herein
+    """
+
+    __slots__ = ("edict", "traceback")
+
+    def __init__(self, msg, exception=None, traceback=None, verror=None):
+        self.edict = {
+            "msg": msg,
+            "exception": exception,
+            "verror": verror,
+        }
+        self.traceback = traceback
+
+    def __call__(self):
+        """
+        Return the error cases
+        """
+        return self.edict
+
+    def __getattr__(self, attr):
+        """
+        Return a lambda that returns the edict
+        """
+        return self.__calling_load_error__
+
+    def __calling_load_error__(
+        self, *args, **kwargs
+    ):  # pylint: disable=unused-argument
+        if self.edict["verror"]:
+            error = "{0[msg]}: {0[verror]}".format(self())
+            raise pop.exc.PopError(error)
+        error = "{0[msg]}: {0[exception]!r}".format(self())
+        if self.traceback:
+            error += "\n" + self.traceback
+        raise pop.exc.PopError(error)
+
+    def __repr__(self):
+        return "<{} edict={!r}>".format(self.__class__.__name__, self.edict)
+
+
+def load_mod(modname: str, form: str, path: str) -> "LoadedMod":
+    """
+    Load a single module
+    :param form: The name of the loader module
+    :param modname: The name of the module to get from the loader
+    :param path: The package to use as the anchor point from which to resolve the
+        relative import to an absolute import.
+    """
+    this = sys.modules[__name__]
+    return getattr(this, form)(modname, path)
+
+
+def _generate_module(name: str) -> types.ModuleType:
+    """
+    Generate a module at runtime and insert it in sys.modules
+    :param name: The name of the module to create
+    """
+    if name in sys.modules:
+        return sys.modules[name]
+
+    code = "'''POP sub auto generated parent module for {0}'''".format(
+        name.split(".")[-1]
+    )
+    # Create a new module that is not entered into sys.modules
+    module = types.ModuleType(name)
+    exec(code, module.__dict__)  # pylint: disable=exec-used
+    sys.modules[name] = module
+    return module
+
+
+def _populate_sys_modules(mod: "LoadedMod"):
+    """
+    This is a hack to populate sys.modules with the modules that pop loads
+    while making sure that parent modules have the attribute for the child
+    modules.
+    """
+    mod_parts = mod.split(".")
+    imp_mod = mod_parts.pop(0)
+    gen_mod = _generate_module(imp_mod)
+    while True:
+        if not mod_parts:
+            break
+        part = mod_parts.pop(0)
+        imp_mod += "." + part
+        gen_child_mod = _generate_module(imp_mod)
+        setattr(gen_mod, part, gen_child_mod)
+        gen_mod = gen_child_mod
+
+
+def ext(modname: str, path: str) -> "LoadedMod" or LoadError:
+    """
+    Attempt to load the named python modules
+    :param modname: The name of the module to get from the loader
+    :param path: The package to use as the anchor point from which to resolve the
+        relative import to an absolute import.
+    """
+    modname = ".".join(modname.split(".")[:-1])
+    if modname in sys.modules:
+        return sys.modules[modname]
+    _populate_sys_modules(modname)
+    try:
+        efl = importlib.machinery.ExtensionFileLoader(modname, path)
+        mod = efl.create_module(importlib.util.find_spec(modname))
+        return efl.exec_module(mod)
+    except Exception as exc:  # pylint: disable=broad-except
+        return LoadError(
+            "Failed to load python module {} at path {}".format(modname, path),
+            exception=exc,
+            traceback=stdlib_traceback.format_exc(),
+        )
+
+
+def python(modname: str, path: str) -> "LoadedMod" or LoadError:
+    """
+    Attempt to load the named python modules
+    :param modname: The name of the module to get from the loader
+    :param path: The package to use as the anchor point from which to resolve the
+        relative import to an absolute import.
+    """
+    if modname in sys.modules:
+        return sys.modules[modname]
+    try:
+        sfl = importlib.machinery.SourceFileLoader(modname, path)
+        return sfl.load_module()
+    except Exception as exc:  # pylint: disable=broad-except
+        return LoadError(
+            "Failed to load python module {} at path {}".format(modname, path),
+            exception=exc,
+            traceback=stdlib_traceback.format_exc(),
+        )
+
+
+def _base_name(bname: str, mod: "LoadedMod") -> Tuple[str, str]:
+    """
+    Find the basename and alias of a loader module
+    :param bname: The base name of the mod's path
+    :param mod: A loader module or a LoadError if the module didn't load
+    """
+    base_name = os.path.basename(bname)
+    if "." in base_name:
+        base_name = base_name.split(".")[0]
+    return base_name, getattr(mod, "__virtualname__", base_name)
+
+
+def _load_virtual(
+    hub: "pop.hub.Hub",
+    virtual: bool,
+    mod: "LoadedMod" or LoadError,
+    bname: str,
+    vtype: str,
+) -> Dict[str, Any]:
+    """
+    Run the virtual function to name the module and check for all loader
+    errors
+    :param hub: The redistributed pop central hub
+    :param virtual: Toggle whether or not to process __virtual__ functions
+    :param mod: A loader module or a LoadError if the module didn't load
+    :param bname: The base name of the mod's path
+    :param vtype: The name of the virtual function to call on the module I.E. __virtual__ or __sub_virtual__
+    """
+    base_name, name = _base_name(bname, mod)
+
+    if isinstance(mod, LoadError):
+        # The mod is a LoadError instance.
+        # Return the load error with name as the base_name because another
+        # module is still allowed to load under the same __virtualname__
+        # but also return the vname information
+        return {"name": base_name, "vname": name, "error": mod}
+
+    if not virtual:
+        # __virtual__ is not to be processed. Return now!
+        return {"name": base_name}
+
+    if not hasattr(mod, vtype):
+        # No __virtual__ processing is required.
+        # Return the mod's name as the defined __virtualname__ if defined,
+        # else, the base_name
+        return {"name": name}
+
+    try:
+        vret = getattr(mod, vtype)(hub)
+        # If the __virtual__ function was asynchronous then run it in an asyncio loop
+        if asyncio.iscoroutine(vret):
+            vret = asyncio.get_running_loop().run_until_complete(vret)
+    except Exception as exc:  # pylint: disable=broad-except
+        err = LoadError(
+            "Virtual threw exception in mod {}".format(bname),
+            exception=exc,
+            traceback=stdlib_traceback.format_exc(),
+        )
+        # Return the load error with name as the base_name because another
+        # module is still allowed to load under the same __virtualname__
+        # but also return the vname information
+        return {"name": base_name, "vname": name, "error": err}
+
+    verror = vret
+    if isinstance(vret, tuple):
+        if len(vret) > 1:
+            verror = vret[1]
+        vret = vret[0]
+
+    if vret is True:
+        # No problems occurred, module is allowed to load
+        # Return the mod's name as the defined __virtualname__ if defined,
+        # else, the base_name
+        return {"name": name}
+
+    if vret is False:
+        # __virtual__ explicitly disabled the loading of this module
+        err = LoadError("Module {} returned virtual FALSE".format(bname), verror=verror)
+        # Return the load error with name as the base_name because another
+        # module is still allowed to load under the same __virtualname__
+        # but also return the vname information
+        return {"name": base_name, "vname": name, "error": err}
+
+    # Anything else besides True/False should be considered a LoadError
+    err = LoadError("Module {} returned virtual error".format(bname), verror=verror)
+    # Return the load error with name as the base_name because another
+    # module is still allowed to load under the same __virtualname__
+    # but also return the vname information
+    return {"name": base_name, "vname": name, "error": err}
+
+
+def load_virtual(
+    hub: "pop.hub.Hub", virtual: bool, mod: "LoadedMod" or LoadError, bname: str
+) -> Dict[str, Any]:
+    """
+    Run the __virtual__ function to name the module and check for all loader errors
+    :param hub: The redistributed pop central hub
+    :param virtual: Toggle whether or not to process __virtual__ functions
+    :param mod: A loader module or a LoadError if the module didn't load
+    :param bname: The base name of the mod's path
+    """
+    return _load_virtual(hub, virtual, mod, bname, "__virtual__")
+
+
+def load_sub_virtual(
+    hub: "pop.hub.Hub", virtual: bool, mod: "LoadedMod" or LoadError, bname: str
+) -> Dict[str, Any]:
+    """
+    Run the __sub_virtual__ function to name the module and check for all loader errors
+    :param hub: The redistributed pop central hub
+    :param virtual: Toggle whether or not to process __virtual__ functions
+    :param mod: A loader module or a LoadError if the module didn't load
+    :param bname: The base name of the mod's path
+    """
+    _, name = _base_name(bname, mod)
+    if name != "init":
+        return {"name": name}
+    return _load_virtual(hub, virtual, mod, bname, "__sub_virtual__")
+
+
+def mod_init(sub: "pop.hub.Sub", mod: "LoadedMod", mod_name: str):
+    """
+    Process module's __init__ function if defined
+    :param sub: The pop object that contains the loaded module data
+    :param mod: A loader modul
+    :param mod_name: The name of the module to get from the loader
+    """
+    if "__init__" in dir(mod):
+        init = pop.contract.Contracted(
+            sub._hub,
+            contracts=[],
+            func=mod.__init__,
+            ref=f"{sub._subname}.{mod_name}",
+            name="__init__",
+        )
+        ret = init()
+        # If the __init__ function was asynchronous then run it in an asyncio loop
+        if asyncio.iscoroutine(ret):
+            asyncio.get_running_loop().run_until_complete(ret)
+
+
+def sub_alias(this_sub: "pop.hub.Sub", mod: "LoadedMod", mod_name: str):
+    """
+    Check the sub alias settings and apply the alias names locally so they can be gathered into the higher level object on the hub
+    :param this_sub: The pop object that contains the loaded module data
+    :param mod: A loader module
+    :param mod_name: The name of the module to get from the loader
+    """
+    if mod_name == "init":
+        alias = getattr(mod, "__sub_alias__", [])
+        if alias:
+            this_sub._alias = alias
+
+
+def prep_loaded_mod(
+    this_sub: "pop.hub.Sub",
+    mod: "LoadedMod",
+    mod_name: str,
+    contracts: List[pop.contract.Wrapper],
+    recursive_contracts: List[pop.contract.Wrapper],
+) -> "LoadedMod":
+    """
+    Read the attributes of a python module and create a LoadedMod, which resolves
+    aliases and omits objects that should not be exposed.
+    :param this_sub: The pop object that contains the loaded module data
+    :param mod: A loader module
+    :param mod_name: The name of the module to get from the loader
+    :param contracts: Contracts functions to add to the sub
+    """
+    lmod = this_sub._loaded.get(mod_name, LoadedMod(mod_name))
+    ref = f"{this_sub._subname}.{mod_name}"  # getattr(hub, ref) should resolve to this module
+    sub_alias(this_sub, mod, mod_name)
+    for attr in getattr(mod, "__load__", dir(mod)):
+        name = getattr(mod, "__func_alias__", {}).get(attr, attr)
+        func = getattr(mod, attr)
+        if not this_sub._omit_vars:
+            if (
+                not inspect.isfunction(func)
+                and not inspect.isclass(func)
+                and type(func).__name__ != "cython_function_or_method"
+            ):
+                lmod._vars[name] = func
+                lmod._attrs[name] = func
+                continue
+        if attr.startswith(this_sub._omit_start):
+            continue
+        if attr.endswith(this_sub._omit_end):
+            continue
+        if (
+            inspect.isfunction(func)
+            or inspect.isbuiltin(func)
+            or type(func).__name__ == "cython_function_or_method"
+        ):
+            obj = pop.contract.create_contracted(
+                this_sub._hub, contracts + recursive_contracts, func, ref, name
+            )
+            if not this_sub._omit_func:
+                if this_sub._pypath and not func.__module__.startswith(mod.__name__):
+                    # We're only interested in functions defined in this module, not
+                    # imported functions
+                    continue
+                lmod._funcs[name] = obj
+                lmod._attrs[name] = obj
+        else:
+            klass = func
+            if not this_sub._omit_class and inspect.isclass(klass):
+                # We're only interested in classes defined in this module, not
+                # imported classes
+                if not klass.__module__.startswith(mod.__name__):
+                    continue
+                lmod._classes[name] = klass
+                lmod._attrs[name] = klass
+    return lmod
+
+
+class LoadedMod(types.ModuleType):
+    """
+    The LoadedMod class allows for the module loaded onto the sub to return
+    custom sequencing, for instance it can be iterated over to return all
+    functions
+    """
+
+    def __init__(self, name: str):
+        super().__init__(name)
+        self._vars = {}
+        self._funcs = {}
+        self._classes = {}
+        self._attrs = {}
+
+    def __getattr__(self, item: str):
+        if item in self._attrs:
+            return self._attrs[item]
+        raise AttributeError(item)
+
+    def __iter__(self):
+        keys = sorted(self._funcs)
+        ret = []
+        for key in keys:
+            ret.append(self._funcs[key])
+        return iter(ret)
+
+    def __dir__(self):
+        # TODO: This should return finite set attrs as well as dunder attrs
+        ret = list(self._attrs.keys())
+        ret.extend(["__name__", "_vars", "_funcs", "_classes", "_attrs"])
+        return ret
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/args.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/args.py
new file mode 100644
index 0000000..094be82
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/args.py
@@ -0,0 +1,274 @@
+# -*- coding: utf-8 -*-
+"""
+Translate an options data structure into command line args
+"""
+
+# Import python libs
+import sys
+import inspect
+import argparse
+import functools
+import collections
+import pop.hub
+
+__virtualname__ = "args"
+__contracts__ = [__virtualname__]
+
+
+class ActionWrapper:
+    """
+    This class wraps argparse.Action instances in order to mark arguments passed
+    on CLI as explicitly passed
+    """
+
+    def __init__(self, action):
+        self._action = action
+        functools.update_wrapper(self, action)
+
+    def __call__(self, parser, namespace, values, option_string):
+        # Let's store the call to this option as an explicit CLI call for later
+        # use when overwriting any configuration settings on file with those
+        # from CLI
+        if getattr(parser, "_explicit_cli_args_", None) is None:
+            setattr(parser, "_explicit_cli_args_", set())
+        parser._explicit_cli_args_.add(
+            self._action.dest
+        )  # pylint: disable=protected-access
+        # Carry on regular operation
+        return self._action(parser, namespace, values, option_string)
+
+    def __getattribute__(self, name):
+        if name == "_action":
+            return object.__getattribute__(self, name)
+        # Proxy any attribute's search to the _action instance
+        return getattr(self._action, name)
+
+    def __repr__(self):
+        return repr(self._action)
+
+
+class ActionClassWrapper:
+    """
+    This class wraps argparse.Action classes in order to mark arguments passed
+    on CLI as explicitly passed
+    """
+
+    def __init__(self, klass):
+        self._klass = klass
+
+    def __call__(self, *args, **kwargs):
+        return ActionWrapper(self._klass(*args, **kwargs))
+
+    def __repr__(self):
+        return repr(self._klass)
+
+    def __getattribute__(self, name):
+        if name == "_klass":
+            return object.__getattribute__(self, name)
+        # Proxy any attributes search to the _klass instance
+        return getattr(self._klass, name)
+
+
+class ArgumentParser(argparse.ArgumentParser):
+    def register(self, name, value, obj):  # pylint: disable=arguments-differ
+        if name == "action":
+            # Let's wrap it on our action class wrapper so we can latter store
+            # which options were explicitly passed from CLI
+            return super(ArgumentParser, self).register(
+                name, value, ActionClassWrapper(obj)
+            )
+        return super(ArgumentParser, self).register(name, value, obj)
+
+    def parse_known_args(self, args=None, namespace=None):
+        namespace, arg_strings = super().parse_known_args(args, namespace)
+        explicit_cli_args = getattr(self, "_explicit_cli_args_", set())
+        if "_explicit_cli_args_" not in namespace:
+            setattr(namespace, "_explicit_cli_args_", set())
+        namespace._explicit_cli_args_.update(explicit_cli_args)
+        return namespace, arg_strings
+
+
+def __init__(hub: "pop.hub.Hub"):
+    """
+    Set up the local memory copy of the parser
+    """
+    hub.conf._mem["args"] = {}
+
+
+def _init_parser(hub: "pop.hub.Hub", opts):
+    if "parser" not in hub.conf._mem["args"]:
+        # Instantiate the parser
+        hub.conf._mem["args"]["parser"] = ArgumentParser(**opts.get("_argparser_", {}))
+
+
+def _keys(opts):
+    """
+    Return the keys in the right order
+    """
+    if isinstance(opts, collections.OrderedDict):
+        return sorted(
+            list(opts), key=lambda k: opts[k].get("display_priority", sys.maxsize)
+        )
+    return sorted(opts, key=lambda k: (opts[k].get("display_priority", sys.maxsize), k))
+
+
+def subs(hub: "pop.hub.Hub", opts):
+    """
+    Set up sub parsers, if using sub parsers this needs to be called
+    before calling setup.
+
+    opts dict:
+        <sub_title>:
+            [desc]: 'Some subparser'
+            help: 'subparser!'
+    """
+    _init_parser(hub, opts)
+    hub.conf._mem["args"]["sub"] = hub.conf._mem["args"]["parser"].add_subparsers(
+        dest="_subparser_"
+    )
+    hub.conf._mem["args"]["subs"] = {}
+    for arg in _keys(opts):
+        if arg in ("_argparser_",):
+            continue
+        comps = opts[arg]
+        kwargs = {}
+        if "help" in comps:
+            kwargs["help"] = comps["help"]
+        if "desc" in comps:
+            kwargs["description"] = comps["desc"]
+        hub.conf._mem["args"]["subs"][arg] = hub.conf._mem["args"]["sub"].add_parser(
+            arg, **kwargs
+        )
+    return {"result": True, "return": True}
+
+
+def setup(hub: "pop.hub.Hub", opts):
+    """
+    Take in a pre-defined opts dict and translate it to args
+
+    opts dict:
+        <arg>:
+            [group]: foo
+            [default]: bar
+            [action]: store_true
+            [options]: # arg will be turned into --arg
+              - '-A'
+              - '--cheese'
+            [choices]:
+              - foo
+              - bar
+              - baz
+            [nargs]: +
+            [type]: int
+            [dest]: cheese
+            help: Some great help message
+    """
+    _init_parser(hub, opts)
+    defaults = {}
+    groups = {}
+    ex_groups = {}
+    for arg in _keys(opts):
+        if arg in ("_argparser_",):
+            continue
+        comps = opts[arg]
+        positional = comps.pop("positional", False)
+        if positional:
+            args = [arg]
+        else:
+            long_opts = ["--{}".format(arg.replace("_", "-"))]
+            short_opts = []
+            for o_str in comps.get("options", []):
+                if not o_str.startswith("--") and o_str.startswith("-"):
+                    short_opts.append(o_str)
+                    continue
+                long_opts.append(o_str)
+            args = short_opts + long_opts
+        kwargs = {}
+        kwargs["action"] = action = comps.get("action", None)
+
+        if action is None:
+            # Non existing option defaults to a StoreAction in argparse
+            action = hub.conf._mem["args"]["parser"]._registry_get(
+                "action", action
+            )  # pylint: disable=protected-access
+
+        if isinstance(action, str):
+            signature = inspect.signature(
+                hub.conf._mem["args"]["parser"]._registry_get("action", action).__init__
+            )  # pylint: disable=protected-access
+        else:
+            signature = inspect.signature(action.__init__)
+
+        for param in signature.parameters:
+            if param == "self" or param not in comps:
+                continue
+            if param == "dest":
+                kwargs["dest"] = comps.get("dest", arg)
+                continue
+            if param == "help":
+                kwargs["help"] = comps.get("help", "THIS NEEDS SOME DOCUMENTATION!!")
+                continue
+            if param == "default":
+                defaults[comps.get("dest", arg)] = comps[param]
+            kwargs[param] = comps[param]
+
+        if "group" in comps:
+            group = comps["group"]
+            if group not in groups:
+                groups[group] = hub.conf._mem["args"]["parser"].add_argument_group(
+                    group
+                )
+            groups[group].add_argument(*args, **kwargs)
+            continue
+        if "ex_group" in comps:
+            group = comps["ex_group"]
+            if group not in ex_groups:
+                ex_groups[group] = hub.conf._mem["args"][
+                    "parser"
+                ].add_mutually_exclusive_group()
+            ex_groups[group].add_argument(*args, **kwargs)
+            continue
+        if "sub" in comps:
+            subs = comps["sub"]
+            if not isinstance(subs, list):
+                subs = [subs]
+            for sub in subs:
+                sparse = hub.conf._mem["args"]["subs"].get(sub)
+                if not sparse:
+                    # Maybe raise exception here? Malformed config?
+                    continue
+                sparse.add_argument(*args, **kwargs)
+            continue
+        hub.conf._mem["args"]["parser"].add_argument(*args, **kwargs)
+    return {"result": True, "return": defaults}
+
+
+def parse(
+    hub: "pop.hub.Hub", args=None, namespace=None, only_parse_known_arguments=False
+):
+    """
+    Parse the command line options
+    """
+    if only_parse_known_arguments:
+        opts, unknown_args = hub.conf._mem["args"]["parser"].parse_known_args(
+            args, namespace
+        )
+        opts_dict = opts.__dict__
+        opts_dict["_unknown_args_"] = unknown_args
+    else:
+        opts = hub.conf._mem["args"]["parser"].parse_args(args, namespace)
+        opts_dict = opts.__dict__
+    return {"result": True, "return": opts_dict}
+
+
+def render(hub: "pop.hub.Hub", defaults, cli_opts, explicit_cli_args):
+    """
+    For options specified as such, take the string passed into the cli and
+    render it using the specified render flag
+    """
+    for key in explicit_cli_args:
+        rend = defaults.get(key, {}).get("render")
+        if rend:
+            ref = f"conf.{rend}.render"
+            cli_opts[key] = hub.pop.ref.last(ref)(cli_opts[key])
+    return cli_opts
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/dirs.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/dirs.py
new file mode 100644
index 0000000..43909d5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/dirs.py
@@ -0,0 +1,56 @@
+"""
+Used to take care of the options that end in `_dir`. The assumption is that
+`_dir` options need to be treated differently. They need to verified to exist
+and they need to be rooted based on the user, root option etc.
+"""
+# Import python libs
+import os
+import pop.hub
+
+
+def roots(hub: "pop.hub.Hub", default_root, f_opts, root_dir):
+    """
+    Detect the root dir data and apply it
+    """
+    os_root = os.path.abspath(os.sep)
+    root = os_root
+    change = False
+    non_priv = False
+    if hasattr(os, "geteuid"):
+        if not os.geteuid() == 0:
+            change = True
+            non_priv = True
+    if root_dir and root_dir != default_root:
+        root = root_dir
+        change = True
+    if not root.endswith(os.sep):
+        root = f"{root}{os.sep}"
+    if change:
+        for imp in f_opts:
+            for key in f_opts[imp]:
+                if key == "root_dir":
+                    continue
+                if key.endswith("_dir"):
+                    if non_priv:
+                        root = os.path.join(os.environ["HOME"], f".{imp}{os.sep}")
+                    if imp in f_opts[imp][key]:
+                        a_len = len(imp) + 1
+                        f_opts[imp][
+                            key
+                        ] = f"{os_root}{f_opts[imp][key][f_opts[imp][key].index(imp)+a_len:]}"
+                    f_opts[imp][key] = f_opts[imp][key].replace(os_root, root, 1)
+
+
+def verify(hub: "pop.hub.Hub", opts):
+    """
+    Verify that the environment and all named directories in the
+    configuration exist
+    """
+    for key in opts:
+        if key == "root_dir":
+            continue
+        if key == "config_dir":
+            continue
+        if key.endswith("_dir"):
+            if not os.path.isdir(opts[key]):
+                os.makedirs(opts[key])
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/file_parser.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/file_parser.py
new file mode 100644
index 0000000..7b8ae8a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/file_parser.py
@@ -0,0 +1,120 @@
+# -*- coding: utf-8 -*-
+"""
+Configuration file core loading functions
+"""
+
+# Import python libs
+import os
+import glob
+import fnmatch
+import pop.hub
+
+__virtualname__ = "file"
+__contracts__ = [__virtualname__]
+
+
+def load_file(hub: "pop.hub.Hub", paths, defaults=None, overrides=None, includes=True):
+    """
+    Load a single configuration file
+    """
+    opts = {}
+    if isinstance(defaults, dict):
+        opts.update(defaults)
+    if not isinstance(paths, list):
+        paths = paths.split(",")
+    add = []
+    for fn_ in paths:
+        add.extend(glob.glob(fn_))
+    paths.extend(add)
+    for fn_ in paths:
+        if hub.conf._loader == "yaml":
+            opts.update(hub.conf.yaml.load(fn_))
+        elif hub.conf._loader == "json":
+            opts.update(hub.conf.json.load(fn_))
+        elif hub.conf._loader == "toml":
+            opts.update(hub.conf.toml.load(fn_))
+    if includes:
+        hub.conf.file.proc_include(opts)
+    if isinstance(overrides, dict):
+        opts.update(overrides)
+    return opts
+
+
+def load_dir(
+    hub,
+    confdir,
+    defaults=None,
+    overrides=None,
+    includes=True,
+    recurse=False,
+    pattern=None,
+):
+    """
+    Load takes a directory location to scan for configuration files. These
+    files will be read in. The defaults dict defines what
+    configuration options should exist if not found in the confdir. Overrides
+    are configuration options which should be included regardless of whether
+    those options existed before. If includes is set to True, then the
+    statements 'include' and 'include_dir' found in either the defaults or
+    in configuration files.
+    """
+    opts = {}
+    if not isinstance(confdir, list):
+        confdir = confdir.split(",")
+    confdirs = []
+    for dirs in confdir:
+        if not isinstance(dirs, (list, tuple)):
+            dirs = [dirs]
+        for dir_ in dirs:
+            confdirs.extend(glob.glob(dir_))
+    if isinstance(defaults, dict):
+        opts.update(defaults)
+    paths = []
+    for dir_ in confdirs:
+        dirpaths = []
+        if os.path.isdir(dir_):
+            if not recurse:
+                for fn_ in os.listdir(dir_):
+                    path = os.path.join(dir_, fn_)
+                    if os.path.isdir(path):
+                        # Don't process directories
+                        continue
+                    if pattern and not fnmatch.fnmatch(fn_, pattern):
+                        continue
+                    dirpaths.append(path)
+            else:
+                for root, dirs, files in os.walk(dir_):
+                    for fn_ in files:
+                        path = os.path.join(root, fn_)
+                        if pattern and not fnmatch.fnmatch(fn_, pattern):
+                            continue
+                        dirpaths.append(path)
+
+        # Sort confdir directory paths like:
+        # /b.txt
+        # /c.txt
+        # /a/x.txt
+        # /b/x.txt
+        paths.extend(sorted(dirpaths, key=lambda p: (p.count(os.path.sep), p)))
+    opts.update(hub.conf.file.load_file(paths, includes))
+    if isinstance(overrides, dict):
+        opts.update(overrides)
+    return opts
+
+
+def proc_include(hub: "pop.hub.Hub", opts):
+    """
+    process include and include_dir
+    """
+    rec = False
+    if opts.get("include_dir"):
+        idir = opts.pop("include_dir")
+        opts.update(hub.conf.file.load_dir(idir))
+        rec = True
+    if opts.get("include"):
+        ifn = opts.pop("include")
+        opts.update(hub.conf.file.load_file(ifn))
+        rec = True
+    if rec:
+        hub.conf.file.proc_include(opts)
+    return opts
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/init.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/init.py
new file mode 100644
index 0000000..15ae74e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/init.py
@@ -0,0 +1,6 @@
+def __init__(hub):
+    """
+    Load the subdirs for conf
+    """
+    hub.__._mem = {}
+    hub.pop.sub.load_subdirs(hub.conf)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/integrate.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/integrate.py
new file mode 100644
index 0000000..84543c3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/integrate.py
@@ -0,0 +1,141 @@
+"""
+Integrate is used to pull config data from multiple sources and merge it into
+the hub. Once it is merged then when a sub is loaded the respective config data
+is loaded into the sub as `OPTS`
+"""
+# Take an *args list of modules to import and look for conf.py
+# Import conf.py if present
+# After gathering all dicts, modify them to merge CLI options
+#
+# Import python libs
+import importlib
+import copy
+import os
+
+
+def _ex_final(confs, final, override, key_to_ref, ops_to_ref):
+    """
+    Scan the configuration datasets, create the final config
+    value, and detect collisions
+    """
+    for arg in confs:
+        for key in confs[arg]:
+            ref = f"{arg}.{key}"
+            if ref in override:
+                s_key = override[ref]["key"]
+                s_opts = override[ref]["options"]
+            else:
+                s_key = key
+                s_opts = confs[arg][key].get("options", [])
+            s_opts.append(f"--{s_key}")
+            final[s_key] = confs[arg][key]
+            if s_opts:
+                final[s_key]["options"] = s_opts
+            if s_key in key_to_ref:
+                key_to_ref[s_key].append(ref)
+            else:
+                key_to_ref[s_key] = [ref]
+            for opt in s_opts:
+                if opt in ops_to_ref:
+                    ops_to_ref[opt].append(ref)
+                else:
+                    ops_to_ref = [ref]
+
+
+def load(
+    hub,
+    imports,
+    override=None,
+    cli=None,
+    roots=False,
+    loader="json",
+    logs=True,
+    version=True,
+):
+    """
+    This function takes a list of python packages to load and look for
+    respective configs. The configs are then loaded in a non-collision
+    way modifying the cli options dynamically.
+    The args look for the named <package>.conf python module and then
+    looks for dictionaries named after the following convention:
+
+    override = {'<package>.key': 'key': 'new_key', 'options': ['--option1', '--option2']}
+
+    CONFIG: The main configuration for this package - loads to hub.OPT['<import>']
+    CLI_CONFIG: Loaded only if this is the only import or if specified in the cli option
+    SUBS: Used to define the subcommands, only loaded if this is the cli config
+    """
+    if override is None:
+        override = {}
+    if isinstance(imports, str):
+        if cli is None:
+            cli = imports
+        imports = [imports]
+    primary = imports[0] if cli is None else cli
+    confs = {}
+    final = {}
+    collides = []
+    key_to_ref = {}
+    ops_to_ref = {}
+    subs = {}
+    for imp in imports:
+        try:
+            cmod = importlib.import_module(f"{imp}.conf")
+        except ImportError:
+            continue
+        if hasattr(cmod, "CONFIG"):
+            confs[imp] = copy.deepcopy(cmod.CONFIG)
+        if cli == imp:
+            if hasattr(cmod, "CLI_CONFIG"):
+                confs[imp].update(copy.deepcopy(cmod.CLI_CONFIG))
+            if hasattr(cmod, "SUBS"):
+                subs = copy.deepcopy(cmod.SUBS)
+    if logs:
+        lconf = hub.conf.log.init.conf(primary)
+        lconf.update(confs[primary])
+        confs[primary] = lconf
+    if version:
+        vconf = hub.conf.version.CONFIG
+        vconf.update(confs[primary])
+        confs[primary] = vconf
+    _ex_final(confs, final, override, key_to_ref, ops_to_ref)
+    for opt in ops_to_ref:
+        g_count = 0
+        if len(ops_to_ref[opt]) > 1:
+            collides.append({opt: ops_to_ref[opt]})
+    for key in key_to_ref:
+        col = []
+        for ref in key_to_ref[key]:
+            col.append(ref)
+        if len(col) > 1:
+            collides.append({key: key_to_ref[key]})
+    if collides:
+        raise KeyError(collides)
+    opts = hub.conf.reader.read(final, subs, loader=loader)
+    # This will be put into an immutable data type before it is passed on
+    f_opts = {}
+    for key in opts:
+        if key == "_subparser_":
+            f_opts["_subparser_"] = opts["_subparser_"]
+            continue
+        for ref in key_to_ref[key]:
+            imp = ref[: ref.rindex(".")]
+            local_key = ref[ref.rindex(".") + 1 :]
+            if imp not in f_opts:
+                f_opts[imp] = {}
+            f_opts[imp][local_key] = opts[key]
+    if roots:
+        root_dir = f_opts.get(cli, {}).get("root_dir")
+        hub.conf.dirs.roots(
+            final.get("root_dir", {}).get("default", os.path.abspath(os.sep)),
+            f_opts,
+            root_dir,
+        )
+        for imp in f_opts:
+            hub.conf.dirs.verify(f_opts[imp])
+    hub.OPT = hub.pop.data.imap(f_opts)
+    if logs:
+        log_plugin = hub.OPT[primary].get("log_plugin")
+        getattr(hub, f"conf.log.{log_plugin}.setup")(hub.OPT[primary])
+    if hub.OPT[primary].get("version"):
+        hub.conf.version.run(primary)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/json_conf.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/json_conf.py
new file mode 100644
index 0000000..8d21d60
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/json_conf.py
@@ -0,0 +1,34 @@
+# -*- coding: utf-8 -*-
+"""
+Define the JSON loader interface
+"""
+
+# Import python libs
+import json
+import pop.hub
+
+__virtualname__ = "json"
+__contracts__ = [__virtualname__]
+
+
+def __virtual__(hub):
+    return True
+
+
+def load(hub: "pop.hub.Hub", path):
+    """
+    Use json to read in a file
+    """
+    try:
+        with open(path, "r") as fp_:
+            ret = json.loads(fp_.read())
+        return ret
+    except FileNotFoundError:
+        return {}
+
+
+def render(hub: "pop.hub.Hub", val):
+    """
+    Take the string and render it in json
+    """
+    return json.loads(val)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/log/__pycache__/basic.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/log/__pycache__/basic.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/log/basic.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/log/basic.py
new file mode 100644
index 0000000..d80d987
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/log/basic.py
@@ -0,0 +1,23 @@
+# Import python libs
+import logging
+import pop.hub
+from typing import Any, Dict
+
+
+def setup(hub: "pop.hub.Hub", conf: Dict[str, Any]):
+    """
+    Given the configuration data set up the logger
+    """
+    level = hub.conf.log.LEVELS.get(conf["log_level"].lower(), logging.INFO)
+    root = logging.getLogger("")
+    root.setLevel(level)
+    cf = logging.Formatter(fmt=conf["log_fmt_console"], datefmt=conf["log_datefmt"])
+    ch = logging.StreamHandler()
+    ch.setLevel(level)
+    ch.setFormatter(cf)
+    root.addHandler(ch)
+    ff = logging.Formatter(fmt=conf["log_fmt_console"], datefmt=conf["log_datefmt"])
+    fh = logging.FileHandler(conf["log_file"])
+    fh.setLevel(level)
+    fh.setFormatter(ff)
+    root.addHandler(fh)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/log/init.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/log/init.py
new file mode 100644
index 0000000..0decb4f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/log/init.py
@@ -0,0 +1,62 @@
+"""
+This sub is used to set up logging for pop projects and injects logging
+options into conf making it easy to add robust logging
+"""
+# Import python libs
+import logging
+import pop.hub
+from typing import Any, Dict
+
+
+def __init__(hub: "pop.hub.Hub"):
+    """
+    Set up variables used by the log subsystem
+    """
+    hub.conf.log.LEVELS = {
+        "debug": logging.DEBUG,
+        "info": logging.INFO,
+        "warning": logging.WARNING,
+        "error": logging.ERROR,
+        "critical": logging.CRITICAL,
+    }
+
+
+def conf(hub: "pop.hub.Hub", name: str) -> Dict[str, Any]:
+    """
+    Return the conf dict for logging, this should be merged OVER by the loaded
+    config dict(s)
+    """
+    # TODO: Make this more robust to handle more logging interfaces
+    ldict = {
+        "log_file": {
+            "default": f"{name}.log",
+            "help": "The location of the log file",
+            "group": "Logging Options",
+        },
+        "log_level": {
+            "default": "warning",
+            "help": "Set the log level, either quiet, info, warning, or error",
+            "group": "Logging Options",
+        },
+        "log_fmt_logfile": {
+            "default": "%(asctime)s,%(msecs)03d [%(name)-17s][%(levelname)-8s] %(message)s",
+            "help": "The format to be given to log file messages",
+            "group": "Logging Options",
+        },
+        "log_fmt_console": {
+            "default": "[%(levelname)-8s] %(message)s",
+            "help": "The log formatting used in the console",
+            "group": "Logging Options",
+        },
+        "log_datefmt": {
+            "default": "%H:%M:%S",
+            "help": "The date format to display in the logs",
+            "group": "Logging Options",
+        },
+        "log_plugin": {
+            "default": "basic",
+            "help": "The logging plugin to use",
+            "group": "Logging Options",
+        },
+    }
+    return ldict
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/nix_os.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/nix_os.py
new file mode 100644
index 0000000..2275c46
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/nix_os.py
@@ -0,0 +1,37 @@
+"""
+The os module is used to gather configuration options from the OS facility
+to send configuration options into applications. In the case of Unix like
+systems this translates to the environment variables. On Windows systems
+this translates to the registry.
+"""
+# Import python libs
+import os
+import pop.hub
+
+__virtualname__ = "os"
+
+
+def __virtual__(hub):
+    """
+    Don't load on Windows, this is for *nix style platforms
+    """
+    # TODO: detect if windows
+    return True
+
+
+def gather(hub: "pop.hub.Hub", defaults):
+    """
+    Iterate over the default config data and look for os: True/str options. When set
+    gather the option from environment variables is present
+    """
+    ret = {}
+    for key in defaults:
+        if not "os" in defaults[key]:
+            continue
+        os_var = defaults[key]["os"]
+        if os_var is True:
+            os_var = key
+        os_var = os_var.upper()
+        if os_var in os.environ:
+            ret[key] = os.environ[os_var]
+    return ret
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/reader.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/reader.py
new file mode 100644
index 0000000..8a877bc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/reader.py
@@ -0,0 +1,114 @@
+# -*- coding: utf-8 -*-
+"""
+The reader module is used to read the config data. This will read in cli
+arguments and merge them with config fie arguments.
+"""
+# Import python libs
+import warnings
+
+# Priority order: cli, config, cli_defaults
+
+__virtualname__ = "reader"
+__contracts__ = [__virtualname__]
+
+
+def _merge_dicts(opts, updates, os_opts, explicit_cli_args):
+    """
+    recursively merge updates into opts
+    """
+    for key, val in os_opts.items():
+        if not val:
+            # Don't use empty os vals
+            continue
+        if key in opts:
+            opts[key] = val
+    for key, val in updates.items():
+        if isinstance(val, dict) and isinstance(opts.get(key), dict):
+            _merge_dicts(opts.get(key, {}), val, os_opts, explicit_cli_args)
+        elif val is not None:
+            if key not in opts:
+                # The key is not in opts(from config file), let's add it
+                opts[key] = val
+                continue
+
+            # We already have a value for the key in opts
+            if opts[key] == val:
+                # The value is the same, carry on
+                continue
+
+            if key in explicit_cli_args:
+                # We have a value for the key in opts(from config file) but
+                # this option was explicitly passed on the CLI, ie, it's not
+                # a default value.
+                # Overwrite what's in opts
+                opts[key] = val
+                continue
+    return opts
+
+
+def read(
+    hub,
+    defaults,
+    subs=None,
+    loader="json",
+    process_cli=True,
+    process_cli_known_args_only=False,
+    args=None,
+    namespace=None,
+):
+    """
+    Pass in the default options dict to use
+    :param opts:
+    :param process_cli: Process the passed args or sys.argv
+    :param process_cli_known_args_only: Tells the ArgumentParser to only process known arguments
+    :param args: Arguments to pass to ArgumentParser
+    :param namespace: argparse.Namespace to pass to ArgumentParser
+    :return: options
+    """
+    msg = "Pop-config is the new means to load configs in pop, reader.read will be removed in pop 13"
+    warnings.warn(msg, DeprecationWarning, stacklevel=2)
+    hub.conf._loader = loader
+    if subs:
+        hub.conf.args.subs(subs)
+    opts = hub.conf.args.setup(defaults)["return"]
+    os_opts = hub.conf.os.gather(defaults)
+    if process_cli is True:
+        cli_opts = hub.conf.args.parse(args, namespace, process_cli_known_args_only)[
+            "return"
+        ]
+    else:
+        cli_opts = {}
+    explicit_cli_args = cli_opts.pop("_explicit_cli_args_", set())
+    cli_opts = hub.conf.args.render(defaults, cli_opts, explicit_cli_args)
+    kwargs = {}
+    # Due to the order of priorities and the representation of defaults in the
+    # Argparser we need to manually check if the config option values are from
+    # the cli or from defaults
+    f_func = False
+    if "config_dir" in cli_opts:
+        if cli_opts["config_dir"]:
+            kwargs["confdir"] = cli_opts["config_dir"]
+        else:
+            kwargs["confdir"] = opts["config_dir"]
+        if "config_recurse" in cli_opts:
+            if cli_opts["config_recurse"]:
+                kwargs["recurse"] = cli_opts["config_recurse"]
+            else:
+                kwargs["recurse"] = opts["config_recurse"]
+        # If the config_dir configuration dictionary provides a configuration
+        # file pattern to read, pass it along
+        kwargs["pattern"] = defaults["config_dir"].get("pattern")
+        f_func = hub.conf.file.load_dir
+    elif "config" in cli_opts:
+        if cli_opts["config"]:
+            kwargs["paths"] = cli_opts["config"]
+        else:
+            kwargs["paths"] = opts["config"]
+        f_func = hub.conf.file.load_file
+    # Render args before config parsing
+    if f_func:
+        f_opts = f_func(**kwargs)
+        opts.update(f_opts)
+        return _merge_dicts(opts, cli_opts, os_opts, explicit_cli_args)
+    else:
+        return _merge_dicts(opts, cli_opts, os_opts, explicit_cli_args)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/toml_conf.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/toml_conf.py
new file mode 100644
index 0000000..13960a1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/toml_conf.py
@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+"""
+Define the yaml loader interface
+"""
+import pop.hub
+
+# Import third party libs
+try:
+    import toml
+
+    HAS_TOML = True
+except ImportError:
+    HAS_TOML = False
+
+__virtualname__ = "toml"
+# __contracts__ = [__virtualname__]
+
+
+def __virtual__(hub: "pop.hub.Hub"):
+    if HAS_TOML:
+        return True
+    return (False, "TOML could not be loaded")
+
+
+def load(hub: "pop.hub.Hub", path):
+    """
+    use toml to read in a file
+    """
+    try:
+        with open(path, "rb") as fp_:
+            return toml.load(fp_.read())
+    except FileNotFoundError:
+        pass
+    return {}
+
+
+def render(hub: "pop.hub.Hub", val):
+    """
+    Take the string and render it in json
+    """
+    return toml.loads(val)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/version.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/version.py
new file mode 100644
index 0000000..1f5ba81
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/version.py
@@ -0,0 +1,25 @@
+"""
+Support embedding version number lookup into cli
+"""
+# IMport python libs
+import importlib
+import pop.hub
+import sys
+
+
+CONFIG = {
+    "version": {
+        "default": False,
+        "action": "store_true",
+        "help": "Display version information",
+    }
+}
+
+
+def run(hub: "pop.hub.Hub", primary):
+    """
+    Check the version number and then exit
+    """
+    mod = importlib.import_module(f"{primary}.version")
+    print(f"{primary} {mod.version}")
+    sys.exit(0)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/yaml_conf.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/yaml_conf.py
new file mode 100644
index 0000000..0d9feec
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/conf/yaml_conf.py
@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+"""
+Define the yaml loader interface
+"""
+
+# Import third party libs
+import pop.hub
+
+try:
+    import yaml
+
+    HAS_YAML = True
+except ImportError:
+    HAS_YAML = False
+
+__virtualname__ = "yaml"
+__contracts__ = [__virtualname__]
+
+
+def __virtual__(hub):
+    if HAS_YAML:
+        return True
+    return (False, "PyYaml could not be loaded")
+
+
+def load(hub: "pop.hub.Hub", path):
+    """
+    use yaml to read in a file
+    """
+    try:
+        with open(path, "rb") as fp_:
+            return yaml.safe_load(fp_.read())
+    except FileNotFoundError:
+        pass
+    return {}
+
+
+def render(hub: "pop.hub.Hub", val):
+    """
+    Take the string and render it in json
+    """
+    return yaml.safe_load(val)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/conf.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/conf.py
new file mode 100644
index 0000000..2932ef5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/conf.py
@@ -0,0 +1,23 @@
+"""
+Convenience wrappers to make using the conf system as easy and seamless as possible
+"""
+import pop.hub
+from typing import Any, Dict, List
+
+
+def integrate(
+    hub: "pop.hub.Hub",
+    imports: List[str] or str,
+    override: Dict[str, Any] = None,
+    cli: str = None,
+    roots: bool = None,
+    loader: str = "json",
+    logs: bool = True,
+):
+    """
+    Load the conf sub and run the integrate sequence.
+    """
+    hub.pop.sub.add("pop.mods.conf")
+    hub.conf.integrate.load(
+        imports, override, cli=cli, roots=roots, loader=loader, logs=logs
+    )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/config.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/config.py
new file mode 100644
index 0000000..c5d0d0c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/config.py
@@ -0,0 +1,18 @@
+import pop.hub
+from typing import List
+
+
+def load(
+    hub: "pop.hub.Hub",
+    sources: List[str],
+    cli: str = None,
+    dyne_name: str = None,
+    loader: str = "yaml",
+    parse_cli: bool = True,
+):
+    """
+    Use the pop-config system to load up a fresh configuration for this project
+    from the included conf.py file.
+    """
+    hub.pop.sub.add(dyne_name="config")
+    hub.config.integrate.load(sources, cli, dyne_name, loader, parse_cli)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/data.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/data.py
new file mode 100644
index 0000000..c1c6666
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/data.py
@@ -0,0 +1,376 @@
+import collections
+import collections.abc as abc
+import copy
+import inspect
+import logging
+import pop.contract as contract
+import pop.hub
+import sys
+from typing import Any, Dict, Iterable, Iterator, List
+
+log = logging.getLogger(__name__)
+
+__func_alias__ = {
+    "immutable_namespaced_map": "imap",
+    "mutable_namespaced_map": "map",
+    "owner_writeable_namespaced_map": "omap",
+}
+
+
+def immutable_namespaced_map(
+    hub: "pop.hub.Hub", init: Dict[str, Any], **kwargs
+) -> abc.MutableMapping:
+    return IMAP(init_=init, **kwargs)
+
+
+class IMAP(abc.Mapping):
+    """
+    An abstract base class that implements the interface of a `dict` but is immutable.
+    Items can be retrieved via namespacing.
+    No values can be changed after initialization
+    """
+
+    def __init__(self, init_: Dict[str, Any], **c_kwargs):
+        """
+        :param init_: A dictionary from which to inherit data
+        """
+        init_.update(**c_kwargs)
+        values = {}
+        for k, v in init_.items():
+            if isinstance(v, Dict):
+                values[k] = IMAP(init_=v)
+            elif isinstance(v, (tuple, int, str, bytes)):
+                values[k] = v
+            elif isinstance(v, Iterable):
+                values[k] = tuple(v)
+            else:
+                values[k] = v
+        # __setattr__ is borked (on purpose) so we have to call it from super() right here
+        super().__setattr__("_IMAP__store", values)
+        log.debug("Initialized immutable namespaced map")
+
+    def __setattr__(self, k: str, v: Any):
+        raise TypeError(
+            f"{self.__class__.__name__} does not support attribute assignment"
+        )
+
+    def __getattr__(self, k: str):
+        if k.startswith("_"):
+            return super().__getattribute__(k)
+        else:
+            return self.__store[k]
+
+    def __getitem__(self, k: str) -> Any:
+        return self.__store[k]
+
+    def __contains__(self, k: str) -> bool:
+        return k in self.__store
+
+    def __iter__(self):
+        return iter(self.__store)
+
+    def __len__(self) -> int:
+        return len(self.__store.keys())
+
+    def __copy__(self) -> Dict[str, Any]:
+        ret = {}
+        # Unpack IMAP items so that it's turtles all the way down
+        for k, v in self.__store.items():
+            if isinstance(v, IMAP):
+                ret[k] = v.__copy__()
+            else:
+                ret[k] = v
+        return ret
+
+    def __repr__(self):
+        return repr(copy.copy(self))
+
+
+def mutable_namespaced_map(hub: "pop.hub.Hub", dict_: Dict[str, Any] = None) -> "MAP":
+    return MAP(dict_=dict_)
+
+
+class WriteLockError(Exception):
+    pass
+
+
+class MAP(abc.MutableMapping):
+    """
+    MAP is a key-value store that allows for setting/getting
+    by either dot or dictionary lookup notation ('.' or '[k]')
+
+    Sub-keys will be created on assignment:
+
+      `map.foo.bar.baz = True` will auto-create foo and bar as MAPs
+
+    while doing
+
+      `map.foo.bar.baz` before assignment will not create foo, bar or baz.
+
+    :param dict_: similar to dict(dict_), initialize using dict_
+    """
+
+    def __init__(self, dict_: Dict[str, Any] = None, parent: "MAP" = None):
+        self.__dict__["_store"] = {}
+        self.__dict__["_parent"] = parent
+        if dict_:
+            # Existing dictionaries might have properties that need wrapped as well
+            self.update(dict_)
+
+    def _set(self, k: str, v: Any):
+        if k.startswith("_"):
+            raise AttributeError("Cannot store values beginning with '_'")
+
+        if isinstance(v, dict):
+            # Cast all nested dict values as MAP so they get it's benefits as well
+            v = self.__class__(dict_=v, parent=self)
+            self._store[k] = v
+        else:
+            self._store[k] = v
+
+    def _get(self, k: str, create: bool = False):
+        if k.startswith("_"):
+            return super().__getattribute__(k)
+        try:
+            if k not in self._store:
+                if not create:
+                    return UninitializedValue([k], self)
+                self._set(k, self.__class__())
+            return self._store[k]
+        except Exception as e:
+            raise AttributeError(*e.args)
+
+    def get(self, k: str, default: Any = None) -> Any:
+        if k in self._store:
+            return getattr(self, k)
+        else:
+            return default
+
+    def __setitem__(self, k: str, v: Any):
+        self._set(k, v)
+
+    def __delitem__(self, k: str):
+        """
+        Cleanup method required by abc.ABC
+        """
+        if k in self._store:
+            del self._store[k]
+
+    def __delattr__(self, k: str):
+        self.__delitem__(k)
+
+    def __getitem__(self, k: str) -> Any:
+        return self._get(k)
+
+    def __getattr__(self, k: str) -> Any:
+        return self._get(k)
+
+    def __setattr__(self, k: str, v: Any):
+        self._set(k, v)
+
+    def __contains__(self, k: str) -> Any:
+        return k in self._store
+
+    def __len__(self) -> int:
+        return len(self._store)
+
+    def __iter__(self) -> Iterator[Any]:
+        return iter(self._store)
+
+    def __repr__(self) -> str:
+        return f"{self.__class__.__name__}({str(self)})"
+
+    def __str__(self) -> str:
+        return str(self._store)
+
+    def __copy__(self) -> Dict[str, Any]:
+        # The copy will be a dictionary, mangle it all you want
+        ret = {}
+        for k, v in self._store.items():
+            if isinstance(v, MAP):
+                ret[k] = v.__copy__()
+            else:
+                ret[k] = v
+        return ret
+
+
+class UninitializedValueError(Exception):
+    pass
+
+
+class UninitializedValue:
+    """
+    We want you to be able to create data on the MAP by doing something like:
+
+        MAP.foo.bar = True
+
+    However, we want uses of un-initialized values to blow up, not auto-create.
+
+    We build up a potentially pending write using a special object that can only be written.
+    Any other use should blow up.
+
+    """
+
+    def __init__(self, path: List[str], map_: MAP):
+        # The path I'm looking up on the map
+        self.__dict__["_path"] = path
+        self.__dict__["_map"] = map_
+
+    def _blowup(self):
+        raise UninitializedValueError(
+            f"Access of uninitialized value '{'.'.join(self.__dict__['_path'])}'"
+        )
+
+    def __getattribute__(self, item: str):
+        if item == "get":
+            pass
+        elif not item.startswith("_"):  # return a new PendingWrite for regular lookups
+            new_path = self._path[:]
+            new_path.append(item)
+            return UninitializedValue(new_path, self._map)
+        elif item not in (
+            "__class__",
+            "__dict__",
+            "__setattr__",
+            "_blowup",
+            "_map",
+            "_path",
+            "get",
+        ):
+            self._blowup()
+        return super().__getattribute__(item)
+
+    def __setattr__(self, k: str, v: Any):
+        node = self._map
+        for part in self._path:
+            node = node._get(part, create=True)
+
+        setattr(node, k, v)
+
+    def __delattr__(self, k: str):
+        pass
+
+    def __getitem__(self, item: str):
+        return getattr(self, item)
+
+    def __setitem__(self, k: str, v: Any):
+        setattr(self, k, v)
+
+    def __delitem__(self, k: str):
+        pass
+
+    def get(self, k: str, default: Any = None) -> Any:
+        return default
+
+    def __bool__(self) -> bool:
+        # Uninitialized values always evaluate to false
+        return False
+
+    def __contains__(self, item: str) -> bool:
+        # If it contained anything it would be initialized
+        return False
+
+    def __hash__(self):
+        self._blowup()
+
+    def __dir__(self):
+        self._blowup()
+
+    def __str__(self):
+        self._blowup()
+
+
+def owner_writeable_namespaced_map(
+    hub, dict_: Dict[str, Any] = None
+) -> "OwnerWriteableMapping":
+    return OwnerWriteableMapping(dict_=dict_)
+
+
+def _stack_frames(relative_start=2):
+    """
+    Efficiently access stack frames.
+    :param relative_start: Starting stack depth; The default, 2 is the parent of the
+                           caller of stack_frames - the first function that may be unknown.
+    :return: a stack frame
+    """
+    if hasattr(sys, "_getframe"):
+        # implementation detail of CPython, speeds things up by 100x.
+        frame = sys._getframe(relative_start)
+        while frame:
+            yield frame
+            frame = frame.f_back
+    else:
+        for frame_info in inspect.stack(context=0)[relative_start:]:
+            yield frame_info.frame
+
+
+WriteLockInfo = collections.namedtuple("WriteLockInfo", ["val", "owner", "lineno"])
+
+
+class OwnerWriteableMapping(MAP):
+    """
+    A MAP variant that is write-locked to the first Contracted function
+    that writes to a given key (becoming the owner). Attempts to write
+    to that key from other functions will receive a WriteLockError showing
+    the owning Contracted function.
+    """
+
+    def __init__(
+        self, dict_: Dict[str, Any] = None, parent: "OwnerWriteableMapping" = None
+    ):
+        super().__init__(dict_, parent)
+
+    def _find_owner(self) -> (contract.Contracted, int):
+        """
+        Return the contracted responsible for assigning to this variable.
+        Returns None if no such function exists.
+        """
+        for frame in _stack_frames(3):
+            if isinstance(frame.f_locals.get("self"), contract.Contracted):
+                contracted = frame.f_locals["self"]
+                log.debug(f"Found contract '{contracted.__name__}'")
+                break
+            else:
+                # find the lineno in the frame *before* our Contracted (the function called)
+                lineno = frame.f_lineno
+        else:
+            # not found
+            contracted = None
+            lineno = -1
+
+        return contracted, lineno
+
+    def _set(self, k: str, v: Any):
+        owner, lineno = self._find_owner()
+        cur = self._store.get(k)
+        if cur is None or cur.owner is owner:
+            if isinstance(v, abc.Mapping):
+                v = self.__class__(dict_=v, parent=self)
+            elif isinstance(v, Iterable) and not isinstance(
+                v, (tuple, str, bytes, UninitializedValue)
+            ):
+                v = tuple(v)  # Lists, sets, and other iterables become immutable
+            super()._set(k, WriteLockInfo(v, owner, lineno))
+        else:
+            file = inspect.getsourcefile(cur.owner.func)
+            raise WriteLockError(
+                f"'{k}' was previously assigned by '{cur.owner.__name__}' ({file}:{cur.lineno})"
+            )
+
+    def _get(self, k: str, create: bool = False) -> Any:
+        v = super()._get(k, create)
+        if not isinstance(v, UninitializedValue):
+            v = v.val
+        return v
+
+    def __str__(self) -> str:
+        return str(self._dict())
+
+    def _dict(self):
+        vals = {}
+        for k, v in self._store.items():
+            if isinstance(v.val, self.__class__):
+                vals[k] = v.val._dict()
+            else:
+                vals[k] = v.val
+        return vals
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/dicts.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/dicts.py
new file mode 100644
index 0000000..6540418
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/dicts.py
@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+"""
+Tools to work with dicts
+"""
+# Import local libs
+import pop.dicts
+import pop.hub
+
+
+def traverse(hub: "pop.hub.Hub", data, key, default=None, delimiter=":"):
+    """
+    Traverse a dict or list using a colon-delimited (or otherwise delimited,
+    using the 'delimiter' param) target string. the target 'foo:bar:0' will
+    return data['foo']['bar'][0] if this value exists, and will otherwise
+    return the dict in the default argument.
+    function will automatically determine the target type.
+    the target 'foo:bar:0' will return data['foo']['bar'][0] if data like
+    {'foo':{'bar':['baz']}} , if data like {'foo':{'bar':{'0':'baz'}}}
+    then return data['foo']['bar']['0']
+    """
+    return pop.dicts.traverse(data, key, default.delimiter)
+
+
+def update(hub: "pop.hub.Hub", dest, upd, recursive_update=True, merge_lists=True):
+    """
+    Recursive version of the default dict.update
+
+    Merges upd recursively into dest
+
+    If recursive_update=False, will use the classic dict.update, or fall back
+    on a manual merge (helpful for non-dict types like FunctionWrapper)
+
+    If merge_lists=True, will aggregate list object types instead of replace.
+    The list in ``upd`` is added to the list in ``dest``, so the resulting list
+    is ``dest[key] + upd[key]``. This behavior is only activated when
+    recursive_update=True. By default merge_lists=False.
+    """
+    return pop.dicts.update(dest, upd, recursive_update, merge_lists)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/dyne.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/dyne.py
new file mode 100644
index 0000000..e3356b2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/dyne.py
@@ -0,0 +1,19 @@
+import pop.hub
+from typing import Any, Dict
+
+
+def get(hub: "pop.hub.Hub") -> Dict[str, Any]:
+    """
+    Retrive the dynamic dirs data for this hub, if dynamic dirs have not been
+    gathered yet then gather it.
+    """
+    if not hub._dscan:
+        hub._scan_dynamic()
+    return hub._dynamic
+
+
+def refresh(hub: "pop.hub.Hub"):
+    """
+    Refresh the dynamic dirs
+    """
+    hub._scan_dynamic()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/input.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/input.py
new file mode 100644
index 0000000..a934aa6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/input.py
@@ -0,0 +1,156 @@
+"""
+The input module is used to translate typical input strings into the
+ref/args/kwargs used by pop when forwarding data into functions.
+"""
+# Import python libs
+import re
+from typing import Any, Dict, List, Tuple
+
+# Import third party libs
+import yaml
+import pop.hub
+
+KWARG_REGEX = re.compile(r"^([^\d\W][\w.-]*)=(?!=)(.*)$", re.UNICODE)
+
+
+def parse(
+    hub: "pop.hub.Hub",
+    args: List[Any],
+    condition: bool = True,
+    no_parse: Tuple[str] = None,
+) -> Tuple[List[Any], Dict[str, Any]]:
+    """
+    Parse out the args and kwargs from a list of input values. Optionally,
+    return the args and kwargs without passing them to condition_input().
+    Don't pull args with key=val apart if it has a newline in it.
+    """
+    if no_parse is None:
+        no_parse = ()
+    _args = []
+    _kwargs = {}
+    for arg in args:
+        if isinstance(arg, str):
+            if "=" in arg:
+                arg_name, arg_value = _parse_kwarg(arg)
+                if arg_name:
+                    _kwargs[arg_name] = (
+                        _yamlify_arg(arg_value)
+                        if arg_name not in no_parse
+                        else arg_value
+                    )
+            else:
+                _args.append(_yamlify_arg(arg))
+        elif isinstance(arg, dict):
+            # Yes, we're popping this key off and adding it back if
+            # condition_input is called below, but this is the only way to
+            # gracefully handle both CLI and API input.
+            if arg.pop("__kwarg__", False) is True:
+                _kwargs.update(arg)
+            else:
+                _args.append(arg)
+        else:
+            _args.append(arg)
+    if condition:
+        return _condition_input(_args, _kwargs)
+    return _args, _kwargs
+
+
+def _yamlify_arg(arg: Any) -> Any:
+    """
+    yaml.safe_load the arg
+    """
+    if not isinstance(arg, str):
+        return arg
+
+    if arg.strip() == "":
+        # Because YAML loads empty (or all whitespace) strings as None, we
+        # return the original string
+        # >>> import yaml
+        # >>> yaml.load('') is None
+        # True
+        # >>> yaml.load('      ') is None
+        # True
+        return arg
+
+    elif "_" in arg and all([x in "0123456789_" for x in arg.strip()]):
+        # When the stripped string includes just digits and underscores, the
+        # underscores are ignored and the digits are combined together and
+        # loaded as an int. We don't want that, so return the original value.
+        return arg
+
+    try:
+        original_arg = arg
+        if "#" in arg:
+            # Only yamlify if it parses into a non-string type, to prevent
+            # loss of content due to # as comment character
+            parsed_arg = yaml.safe_load(arg)
+            if isinstance(parsed_arg, str) or parsed_arg is None:
+                return arg
+            return parsed_arg
+        if arg == "None":
+            arg = None
+        else:
+            arg = yaml.safe_load(arg)
+
+        if isinstance(arg, dict):
+            # dicts must be wrapped in curly braces
+            if isinstance(original_arg, str) and not original_arg.startswith("{"):
+                return original_arg
+            else:
+                return arg
+
+        elif isinstance(arg, list):
+            # lists must be wrapped in brackets
+            if isinstance(original_arg, str) and not original_arg.startswith("["):
+                return original_arg
+            else:
+                return arg
+
+        elif arg is None or isinstance(arg, (list, float, int, str)):
+            # yaml.safe_load will load '|' as '', don't let it do that.
+            if arg == "" and original_arg in ("|",):
+                return original_arg
+            # yaml.safe_load will treat '#' as a comment, so a value of '#'
+            # will become None. Keep this value from being stomped as well.
+            elif arg is None and original_arg.strip().startswith("#"):
+                return original_arg
+            else:
+                return arg
+        else:
+            # we don't support this type
+            return original_arg
+    except Exception:
+        # In case anything goes wrong...
+        return original_arg
+
+
+def _parse_kwarg(string_: str) -> Tuple:
+    """
+    Parses the string and looks for the following kwarg format:
+    "{argument name}={argument value}"
+    For example: "my_message=Hello world"
+    Returns the kwarg name and value, or (None, None) if the regex was not
+    matched.
+    """
+    try:
+        return KWARG_REGEX.match(string_).groups()
+    except AttributeError:
+        return None, None
+
+
+def _condition_input(args: List[Any], kwargs: Dict[str, Any]) -> List[str]:
+    """
+    Return a single arg structure for the publisher to safely use
+    """
+    ret = []
+    for arg in args:
+        if isinstance(arg, int):
+            ret.append(str(arg))
+        else:
+            ret.append(arg)
+    if isinstance(kwargs, dict) and kwargs:
+        kw_ = {"__kwarg__": True}
+        for key, val in kwargs.items():
+            kw_[key] = val
+        return ret + [kw_]
+    return ret
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/loop.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/loop.py
new file mode 100644
index 0000000..9517650
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/loop.py
@@ -0,0 +1,173 @@
+# -*- coding: utf-8 -*-
+"""
+The main interface for management of the aio loop
+"""
+# Import python libs
+import asyncio
+import os
+import pop.hub
+import signal
+import functools
+from typing import Callable, Iterable, Generator
+
+__virtualname__ = "loop"
+
+
+def __virtual__(hub: "pop.hub.Hub"):
+    return True
+
+
+def create(hub: "pop.hub.Hub"):
+    """
+    Create the loop at hub.pop.Loop
+    """
+    if not hasattr(hub.pop, "Loop"):
+        hub.pop.loop.FUT_QUE = asyncio.Queue()
+        if os.name == "nt":
+            hub.pop.Loop = asyncio._get_running_loop()
+            if hub.pop.Loop is not None:
+                return
+            # The default event loop on Windows, "SelectorEventLoop" has certain limitations
+            # ProactorEventLoop makes use of Window's I/O Completion Ports:
+            #   https://docs.microsoft.com/en-ca/windows/win32/fileio/i-o-completion-ports
+            hub.pop.Loop = asyncio.ProactorEventLoop()
+            asyncio.set_event_loop(hub.pop.Loop)
+        else:
+            hub.pop.Loop = asyncio.get_event_loop()
+
+
+def call_soon(hub: "pop.hub.Hub", ref: str, *args, **kwargs):
+    """
+    Schedule a coroutine to be called when the loop has time. This needs
+    to be called after the creation fo the loop
+    """
+    fun = hub.pop.ref.get_func(ref)
+    hub.pop.Loop.call_soon(functools.partial(fun, *args, **kwargs))
+
+
+def ensure_future(hub: "pop.hub.Hub", ref: str, *args, **kwargs):
+    """
+    Schedule a coroutine to be called when the loop has time. This needs
+    to be called after the creation fo the loop. This function also uses
+    the hold system to await the future when it is done making it easy
+    to create a future that will be cleanly awaited in the background.
+    """
+    fun = getattr(hub, ref)
+    future = asyncio.ensure_future(fun(*args, **kwargs))
+
+    def callback(fut):
+        hub.pop.loop.FUT_QUE.put_nowait(fut)
+
+    future.add_done_callback(callback)
+    return future
+
+
+def start(
+    hub: "pop.hub.Hub",
+    *coros,
+    hold: bool = False,
+    sigint: Callable = None,
+    sigterm: Callable = None,
+):
+    """
+    Start a loop that will run until complete
+    """
+    hub.pop.loop.create()
+    if sigint:
+        s = signal.SIGINT
+        hub.pop.Loop.add_signal_handler(s, lambda s=s: asyncio.create_task(sigint(s)))
+    if sigterm:
+        s = signal.SIGTERM
+        hub.pop.Loop.add_signal_handler(s, lambda s=s: asyncio.create_task(sigterm(s)))
+    if hold:
+        coros = list(coros)
+        coros.append(_holder(hub))
+    try:
+        # DO NOT CHANGE THIS CALL TO run_forever! If we do that then the tracebacks
+        # do not get resolved.
+        return hub.pop.Loop.run_until_complete(asyncio.gather(*coros))
+    except KeyboardInterrupt as e:
+        print("Caught keyboard interrupt. Canceling...")
+        hub.pop.Loop.close()
+
+
+async def _holder(hub: "pop.hub.Hub"):
+    """
+    Just a sleeping while loop to hold the loop open while it runs until
+    complete
+    """
+    while True:
+        future = await hub.pop.loop.FUT_QUE.get()
+        await future
+
+
+async def await_futures(hub: "pop.hub.Hub"):
+    """
+    Scan over the futures that have completed and manually await them.
+    This function is used to clean up futures when the loop is not opened
+    up with hold=True so that ensured futures can be cleaned up on demand
+    """
+    while not hub.pop.loop.FUT_QUE.empty():
+        future = await hub.pop.loop.FUT_QUE.get()
+        await future
+
+
+async def kill(hub: "pop.hub.Hub", wait: int or float = 0):
+    """
+    Close out the loop
+    """
+    await asyncio.sleep(wait)
+    hub.pop.Loop.stop()
+    while True:
+        if not hub.pop.Loop.is_running():
+            hub.pop.Loop.close()
+        await asyncio.sleep(1)
+
+
+async def as_yielded(hub: "pop.hub.Hub", gens: Iterable[Generator]):
+    """
+    Concurrently run multiple async generators and yield the next yielded
+    value from the soonest yielded generator.
+
+    async def many():
+        for n in range(10):
+            yield os.urandom(6).hex()
+
+    async def run():
+        gens = []
+        for n in range(10):
+            gens.append(many())
+        async for y in as_yielded(gens):
+            print(y)
+    """
+    fin = os.urandom(32)
+    que = asyncio.Queue()
+    fs = []
+    to_clean = []
+
+    async def _yield(gen):
+        async for comp in gen:
+            await que.put(comp)
+
+    async def _ensure(coros):
+        for f in asyncio.as_completed(coros):
+            await f
+
+    async def _set_done():
+        await que.put(fin)
+
+    def _done(future):
+        to_clean.append(asyncio.ensure_future(_set_done()))
+
+    coros = []
+    for gen in gens:
+        coros.append(_yield(gen))
+    f = asyncio.ensure_future(_ensure(coros))
+    f.add_done_callback(_done)
+    while True:
+        ret = await que.get()
+        if ret == fin:
+            break
+        yield ret
+    for c in to_clean:
+        await c
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/ref.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/ref.py
new file mode 100644
index 0000000..cdec146
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/ref.py
@@ -0,0 +1,46 @@
+"""
+Used to resolve resolutions to paths on the hub
+"""
+import pop.hub
+from typing import List
+
+
+def last(hub: "pop.hub.Hub", ref: str) -> "pop.hub.Sub":
+    """
+    Takes a string that references the desired ref and returns the last object
+    called out in that ref
+    """
+    return hub.pop.ref.path(ref)[-1]
+
+
+def path(hub: "pop.hub.Hub", ref: str) -> List["pop.hub.Sub"]:
+    """
+    Retuns a list of references up to the named ref
+    """
+    ret = [hub]
+    if isinstance(ref, str):
+        ref = ref.split(".")
+    for chunk in ref:
+        ret.append(getattr(ret[-1], chunk))
+    return ret
+
+
+def create(hub: "pop.hub.Hub", ref: str, obj: object):
+    """
+    Create an attribute at a given target using just a ref string and the
+    object to be saved at said location. The desired location must already
+    exist!
+
+    :param hub: The redistributed pop central hub
+    :param ref: The dot delimited string referencing the target location to
+        create the given object on the hub
+    :param obj: The object to store at the given reference point
+    """
+    if "." not in ref:
+        setattr(hub, ref, obj)
+        return
+    comps = ref.split(".")
+    sub_ref = ref[: ref.rindex(".")]
+    var = comps[-1]
+    top = hub.pop.ref.last(sub_ref)
+    setattr(top, var, obj)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/seed.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/seed.py
new file mode 100644
index 0000000..2e929d7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/seed.py
@@ -0,0 +1,360 @@
+"""
+Seed a new project with a directory tree and first files
+"""
+# Import python libs
+import os
+import pop.hub
+
+SETUP = """#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# Import python libs
+import os
+import shutil
+from setuptools import setup, Command
+
+NAME = "%%NAME%%"
+DESC = ""
+
+# Version info -- read without importing
+_locals = {}
+with open("{}/version.py".format(NAME)) as fp:
+    exec(fp.read(), None, _locals)
+VERSION = _locals["version"]
+SETUP_DIRNAME = os.path.dirname(__file__)
+if not SETUP_DIRNAME:
+    SETUP_DIRNAME = os.getcwd()
+
+with open("README.rst", encoding="utf-8") as f:
+    LONG_DESC = f.read()
+
+with open("requirements.txt") as f:
+    REQUIREMENTS = f.read().splitlines()
+
+
+class Clean(Command):
+    user_options = []
+
+    def initialize_options(self):
+        pass
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        for subdir in (NAME, "tests"):
+            for root, dirs, files in os.walk(
+                os.path.join(os.path.dirname(__file__), subdir)
+            ):
+                for dir_ in dirs:
+                    if dir_ == "__pycache__":
+                        shutil.rmtree(os.path.join(root, dir_))
+
+
+def discover_packages():
+    modules = []
+    for package in (NAME,):
+        for root, _, files in os.walk(os.path.join(SETUP_DIRNAME, package)):
+            pdir = os.path.relpath(root, SETUP_DIRNAME)
+            modname = pdir.replace(os.sep, ".")
+            modules.append(modname)
+    return modules
+
+
+setup(
+    name=NAME,
+    author="",
+    author_email="",
+    url="",
+    version=VERSION,
+    install_requires=REQUIREMENTS,
+    description=DESC,
+    long_description=LONG_DESC,
+    long_description_content_type="text/x-rst",
+    python_requires=">=3.6",
+    classifiers=[
+        "Operating System :: OS Independent",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Development Status :: 5 - Production/Stable",
+    ],
+    packages=discover_packages(),
+    entry_points={"console_scripts": ["%%NAME%% = %%NAME%%.scripts:start",],},
+    cmdclass={"clean": Clean},
+)
+"""
+
+PYPROJ = r"""[tool.black]
+line-length = 88
+target-version = ['py36', 'py37', 'py38']
+include = '\.pyi?$'
+exclude = '''
+(
+  /(
+      \.eggs
+    | \.git
+    | \.hg
+    | \.mypy_cache
+    | \.tox
+    | \.venv
+    | _build
+    | buck-out
+    | build
+    | dist
+  )/
+)
+'''
+"""
+
+PRECOM = r"""---
+minimum_pre_commit_version: 1.15.2
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.5.0
+    hooks:
+      - id: check-merge-conflict  # Check for files that contain merge conflict strings.
+        language_version: python3
+      - id: trailing-whitespace   # Trims trailing whitespace.
+        args: [--markdown-linebreak-ext=md]
+        language_version: python3
+      - id: mixed-line-ending     # Replaces or checks mixed line ending.
+        args: [--fix=lf]
+        language_version: python3
+      - id: end-of-file-fixer     # Makes sure files end in a newline and only a newline.
+        exclude: tests/fake_.*\.key
+        language_version: python3
+      - id: check-ast             # Simply check whether files parse as valid python.
+        language_version: python3
+      - id: check-yaml
+      - id: check-json
+  -   repo: https://github.com/psf/black
+      rev: 19.10b0
+      hooks:
+      - id: black
+        language_version: python3
+"""
+
+ENTRY = """entry_points={
+        'console_scripts': [
+            '%%NAME%% = %%NAME%%.scripts:start',
+            ],
+          },"""
+
+SCRIPT = """#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import pop.hub
+
+
+def start():
+    hub = pop.hub.Hub()
+    hub.pop.sub.add(dyne_name="%%NAME%%")
+    hub.%%NAME%%.init.cli()
+"""
+
+INIT = """def __init__(hub):
+    # Remember not to start your app in the __init__ function
+    # This function should just be used to set up the plugin subsystem
+    # Add another function to call from your run.py to start the app
+    pass
+
+
+def cli(hub):
+    hub.pop.config.load(["%%NAME%%"], cli="%%NAME%%")
+    print("%%NAME%% works!")
+"""
+
+REQ = "pop\n"
+
+CONF = """CLI_CONFIG = {}
+CONFIG = {}
+SUBCOMMANDS = {}
+DYNE = {
+    "%%NAME%%": ["%%NAME%%"],
+%%DYNE%%}
+"""
+
+VER = """# -*- coding: utf-8 -*-
+version = "1"\n
+"""
+
+
+def new(hub: "pop.hub.Hub"):
+    """
+    Given the option in hub.opts "seed_name" create a directory tree for a
+    new pop project
+    """
+    hub.PATH = os.getcwd()
+    name = hub.opts["seed_name"]
+    for dyne in hub.opts["dyne"]:
+        hub.pop.seed.mkdir(name, dyne)
+        hub.pop.seed.mkdir(name, dyne, "contracts")
+    if hub.opts["type"] == "v":
+        hub.pop.seed.mkdir(name)
+        hub.pop.seed.mksetup(name, entry=False)
+        hub.pop.seed.mkversion(name)
+        hub.pop.seed.mkconf(name)
+        hub.pop.seed.mkreq(name)
+        hub.pop.seed.mkreadme(name)
+    else:
+        hub.pop.seed.mkdir(name, name)
+        hub.pop.seed.mkdir(name, name, "contracts")
+        hub.pop.seed.mksetup(name)
+        hub.pop.seed.mkscript(name)
+        hub.pop.seed.mkversion(name)
+        hub.pop.seed.mkconf(name)
+        hub.pop.seed.mkreq(name)
+        hub.pop.seed.mkrun(name)
+        hub.pop.seed.mkinit(name)
+        hub.pop.seed.mkreadme(name)
+    hub.pop.seed.mkproj()
+    hub.pop.seed.mkprecom()
+    hub.pop.seed.print_post(name)
+
+
+def mkdir(hub: "pop.hub.Hub", *args):
+    """
+    Create the named dir
+    """
+    path = hub.PATH
+    for dir_ in args:
+        path = os.path.join(path, dir_)
+        if not os.path.isdir(path):
+            try:
+                os.makedirs(path)
+            except Exception:
+                print("Failed to make {}".format(path))
+                continue
+            if dir_ == "scripts" and len(args) == 1:
+                continue
+
+
+def mkreq(hub: "pop.hub.Hub", name: str):
+    path = os.path.join(hub.PATH, "requirements.txt")
+    with open(path, "w+") as fp:
+        fp.write(REQ)
+
+
+def mksetup(hub: "pop.hub.Hub", name: str, entry: bool = True):
+    """
+    Create and write out a setup.py file
+    """
+    path = os.path.join(hub.PATH, "setup.py")
+    setup_str = SETUP.replace("%%NAME%%", name)
+    if entry:
+        setup_str = setup_str.replace(
+            "%%ENTRY%%",
+            ENTRY.replace(
+                "%%NAME%%.scripts:start", f"{name.replace('-', '_')}.scripts:start"
+            ),
+        )
+        setup_str = setup_str.replace("%%ENTRY%%", ENTRY.replace("%%NAME%%", name))
+    else:
+        setup_str = setup_str.replace("%%ENTRY%%", "")
+    with open(path, "w+") as fp:
+        fp.write(setup_str)
+
+
+def mkscript(hub: "pop.hub.Hub", name: str):
+    """
+    Create and write out a setup.py file
+    """
+    path = os.path.join(hub.PATH, name, "scripts.py")
+    script_str = SCRIPT.replace("%%NAME%%", name)
+    with open(path, "w+") as fp:
+        fp.write(script_str)
+
+
+def mkrun(hub: "pop.hub.Hub", name: str):
+    """
+    Create the convenience run.py script allowing the project to
+    be executed from the local directory
+    """
+    path = os.path.join(hub.PATH, "run.py")
+    run_str = SCRIPT.replace("%%NAME%%", name)
+    run_str += "\n\nstart()\n"
+    with open(path, "w+") as fp:
+        fp.write(run_str)
+
+
+def mkinit(hub: "pop.hub.Hub", name: str):
+    """
+    Create the intial init.py
+    """
+    path = os.path.join(hub.PATH, name, name, "init.py")
+    init_str = INIT.replace("%%NAME%%", name)
+    with open(path, "w+") as fp:
+        fp.write(init_str)
+
+
+def mkversion(hub: "pop.hub.Hub", name: str):
+    """
+    Create the version.py file
+    """
+    path = os.path.join(hub.PATH, name, "version.py")
+    with open(path, "w+") as fp:
+        fp.write(VER)
+
+
+def mkconf(hub: "pop.hub.Hub", name: str):
+    """
+    Create the version.py file
+    """
+    path = os.path.join(hub.PATH, name, "conf.py")
+    dyne_str = ""
+    for dyne in hub.opts["dyne"]:
+        dyne_str += f'    "{dyne}": ["{dyne}"],\n'
+    conf_str = CONF.replace("%%NAME%%", name)
+    conf_str = conf_str.replace("%%DYNE%%", dyne_str)
+    with open(path, "w+") as fp:
+        fp.write(conf_str)
+
+
+def mkreadme(hub: "pop.hub.Hub", name: str):
+    """
+    Create and write out a setup.py file
+    """
+    path = os.path.join(hub.PATH, "README.rst")
+    eqchars = "=" * len(name)
+    readme_str = f"{eqchars}\n{name.upper()}\n{eqchars}\n"
+    with open(path, "w+") as fp:
+        fp.write(readme_str)
+
+
+def mkproj(hub: "pop.hub.Hub"):
+    """
+    Create the pyproject.toml file
+    """
+    path = os.path.join(hub.PATH, "pyproject.toml")
+    with open(path, "a+") as fp:
+        fp.write(PYPROJ)
+
+
+def mkprecom(hub: "pop.hub.Hub"):
+    """
+    Create the precommit file
+    """
+    path = os.path.join(hub.PATH, ".pre-commit-config.yaml")
+    with open(path, "w+") as fp:
+        fp.write(PRECOM)
+
+
+def print_post(hub: "pop.hub.Hub", name: str):
+    """
+    Print a message after the run to document how to enable
+    things like pre-commit
+    """
+    print(f"Congratulations! You now have a project set up called {name}!")
+    print("This project can be executed by calling the run.py script:")
+    print("    python3 run.py")
+    print(
+        "This project has been set up with pre-commit hooks for code checks and black."
+    )
+    print('First set up your source control environment with "git init" or "hg init".')
+    print("Then enable these checks in your git checkout:")
+    print("    pip install pre-commit")
+    print("    pre-commit install")
+    print("To run pre-commit manually, execute:")
+    print("    pre-commit run --all-files")
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/sub.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/sub.py
new file mode 100644
index 0000000..0b2b010
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/sub.py
@@ -0,0 +1,253 @@
+# -*- coding: utf-8 -*-
+"""
+Control and add subsystems to the running daemon hub
+"""
+# Import python libs
+import os
+from typing import Generator, List, Tuple
+
+# Import pop libs
+import pop.hub
+
+
+def add(
+    hub: pop.hub.Hub,
+    pypath: List[str] or str = None,
+    subname: str = None,
+    sub: pop.hub.Sub = None,
+    static: List[str] or str = None,
+    contracts_pypath: List[str] or str = None,
+    contracts_static: List[str] or str = None,
+    default_contracts: List[str] or str = None,
+    virtual: bool = True,
+    dyne_name: str = None,
+    omit_start: Tuple[str] = ("_",),
+    omit_end: Tuple[str] = (),
+    omit_func: bool = False,
+    omit_class: bool = True,
+    omit_vars: bool = False,
+    mod_basename: str = "pop.sub",
+    stop_on_failures: bool = False,
+    load_all: bool = True,
+    recursive_contracts_static: List[str] or str = None,
+    default_recursive_contracts: List[str]
+    or str = None,  # TODO: Not str, pretty sure -W. Werner, 2020-10-20
+):
+    """
+    Add a new subsystem to the hub
+    :param hub: The redistributed pop central hub
+    :param subname: The name that the sub is going to take on the hub
+        if nothing else is passed, it is used as the pypath (TODO make it the dyne_name not the pypath)
+    :param sub: The sub to use as the root to add to
+    :param pypath: One or many python paths which will be imported
+    :param static: Directories that can be explicitly passed
+    :param contracts_pypath: Load additional contract paths
+    :param contracts_static: Load additional contract paths from a specific directory
+    :param default_contracts: Specifies that a specific contract plugin will be applied as a default to all plugins
+    :param virtual: Toggle whether or not to process __virtual__ functions
+    :param dyne_name: The dynamic name to use to look up paths to find plugins -- linked to conf.py
+    :param omit_start: Allows you to pass in a tuple of characters that would omit the loading of any object
+        I.E. Any function starting with an underscore will not be loaded onto a plugin
+        (You should probably never change this)
+    :param omit_end:Allows you to pass in a tuple of characters that would omit the loading of an object
+        (You should probably never change this)
+    :param omit_func: bool: Don't load any functions
+    :param omit_class: bool: Don't load any classes
+    :param omit_vars: bool: Don't load any vars
+    :param mod_basename: str: Manipulate the location in sys.modules that the plugin will be loaded to.
+        Allow plugins to be loaded into a separate namespace.
+    :param stop_on_failures: If any module fails to load for any reason, stacktrace and do not continue loading this sub
+    :param load_all: Load all the plugins on the sub
+    """
+    if pypath:
+        pypath = pop.hub.ex_path(pypath)
+        subname = subname if subname else pypath[0].split(".")[-1]
+    elif static:
+        subname = subname if subname else os.path.basename(static)
+    if dyne_name:
+        subname = subname if subname else dyne_name
+    root = sub or hub
+    root._subs[subname] = pop.hub.Sub(
+        hub,
+        subname,
+        root,
+        pypath,
+        static,
+        contracts_pypath,
+        contracts_static,
+        default_contracts,
+        virtual,
+        dyne_name,
+        omit_start,
+        omit_end,
+        omit_func,
+        omit_class,
+        omit_vars,
+        mod_basename,
+        stop_on_failures,
+        sub_virtual=getattr(root, "_subvirt", True),
+        recursive_contracts_static=recursive_contracts_static,
+        default_recursive_contracts=default_recursive_contracts,
+    )
+    # init the sub (init.py:__init__) after it can be referenced on the hub!
+    root._subs[subname]._sub_init()
+    root._iter_subs = sorted(root._subs.keys())
+    if load_all:
+        root._subs[subname]._load_all()
+    for alias in root._subs[subname]._alias:
+        root._sub_alias[alias] = subname
+
+
+def remove(hub: pop.hub.Hub, subname: str):
+    """
+    Remove a pop from the hub, run the shutdown if needed
+    :param hub: The redistributed pop central hub
+    :param subname: The name that the sub is going to take on the hub
+        if nothing else is passed, it is used as the pypath (TODO make it the dyne_name not the pypath)
+    """
+    if hasattr(hub, subname):
+        sub = getattr(hub, subname)
+        if hasattr(sub, "init"):
+            mod = getattr(sub, "init")
+            if hasattr(mod, "shutdown"):
+                mod.shutdown()
+        hub._remove_subsystem(subname)
+
+
+def load_all(hub: pop.hub.Hub, subname: str) -> bool:
+    """
+    Load all modules under a given pop
+    :param hub: The redistributed pop central hub
+    :param subname: The name that the sub is going to take on the hub
+        if nothing else is passed, it is used as the pypath (TODO make it the dyne_name not the pypath)
+    """
+    if hasattr(hub, subname):
+        sub = getattr(hub, subname)
+        sub._load_all()
+        return True
+    else:
+        return False
+
+
+def get_dirs(hub: pop.hub.Hub, sub: pop.hub.Sub) -> List[str]:
+    """
+    Return a list of directories that contain the modules for this subname
+    :param hub: The redistributed pop central hub
+    :param sub: The pop object that contains the loaded module data
+    """
+    return sub._dirs
+
+
+def iter_subs(
+    hub: pop.hub.Hub, sub: pop.hub.Sub, recurse: bool = False
+) -> Generator[pop.hub.Sub, None, None]:
+    """
+    Return an iterator that will traverse just the subs. This is useful for
+    nested subs
+    :param hub: The redistributed pop central hub
+    :param recurse: Recursively iterate over nested subs
+    """
+    for name in sorted(sub._subs):
+        ret = sub._subs[name]
+        if ret._sub_virtual:
+            yield ret
+            if recurse:
+                if hasattr(ret, "_subs"):
+                    for nest in hub.pop.sub.iter_subs(ret, recurse):
+                        yield nest
+
+
+def load_subdirs(hub: pop.hub.Hub, sub: pop.hub.Sub, recurse: bool = False):
+    """
+    Given a sub, load all subdirectories found under the sub into a lower namespace
+    :param hub: The redistributed pop central hub
+    :param sub: The pop object that contains the loaded module data
+    :param recurse: Recursively iterate over nested subs
+    """
+    if not sub._sub_virtual:
+        return
+    dirs = hub.pop.sub.get_dirs(sub)
+    roots = {}
+    for dir_ in dirs:
+        for fn in os.listdir(dir_):
+            if fn.startswith("_"):
+                continue
+            if fn == "contracts":
+                continue
+            full = os.path.join(dir_, fn)
+            if not os.path.isdir(full):
+                continue
+            if fn not in roots:
+                roots[fn] = [full]
+            else:
+                roots[fn].append(full)
+    for name, sub_dirs in roots.items():
+        # Load er up!
+        hub.pop.sub.add(
+            subname=name,
+            sub=sub,
+            static=sub_dirs,
+            virtual=sub._virtual,
+            omit_start=sub._omit_start,
+            omit_end=sub._omit_end,
+            omit_func=sub._omit_func,
+            omit_class=sub._omit_class,
+            omit_vars=sub._omit_vars,
+            mod_basename=sub._mod_basename,
+            stop_on_failures=sub._stop_on_failures,
+        )
+        if recurse:
+            if isinstance(getattr(sub, name), pop.hub.Sub):
+                hub.pop.sub.load_subdirs(getattr(sub, name), recurse)
+
+
+def reload(hub: pop.hub.Hub, subname: str):
+    """
+    Instruct the hub to reload the modules for the given sub. This does not call
+    the init.new function or remove sub level variables. But it does re-read the
+    directory list and re-initialize the loader causing all modules to be re-evaluated
+    when started.
+    :param hub: The redistributed pop central hub
+    :param subname: The name that the sub is going to take on the hub
+        if nothing else is passed, it is used as the pypath (TODO make it the dyne_name not the pypath)
+    """
+    if hasattr(hub, subname):
+        sub = getattr(hub, subname)
+        sub._prepare()
+        return True
+    else:
+        return False
+
+
+def extend(
+    hub: pop.hub.Hub,
+    subname: str,
+    pypath: List[str] or str = None,
+    static: List[str] or str = None,
+    contracts_pypath: List[str] or str = None,
+    contracts_static: List[str] or str = None,
+) -> bool:
+    """
+    Extend the directory lookup for a given sub. Any of the directory lookup
+    arguments can be passed.
+    :param hub: The redistributed pop central hub
+    :param subname: The name that the sub is going to take on the hub
+        if nothing else is passed, it is used as the pypath (TODO make it the dyne_name not the pypath)
+    :param pypath: One or many python paths which will be imported
+    :param static: Directories that can be explicitly passed
+    :param contracts_pypath: Load additional contract paths
+    :param contracts_static: Load additional contract paths from a specific directory
+    """
+    if not hasattr(hub, subname):
+        return False
+    sub = getattr(hub, subname)
+    if pypath:
+        sub._pypath.extend(pop.hub.ex_path(pypath))
+    if static:
+        sub._static.extend(pop.hub.ex_path(static))
+    if contracts_pypath:
+        sub._contracts_pypath.extend(pop.hub.ex_path(contracts_pypath))
+    if contracts_static:
+        sub._contracts_static.extend(pop.hub.ex_path(contracts_static))
+    sub._prepare()
+    return True
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/testing.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/testing.py
new file mode 100644
index 0000000..30c7952
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/testing.py
@@ -0,0 +1,373 @@
+# -*- coding: utf-8 -*-
+"""
+Provides tools to help unit test projects using pop.
+For now, provides mock Hub instances.
+"""
+# Import python libs
+import inspect
+import copy
+from asyncio import iscoroutinefunction
+
+# Import third party libs
+try:
+    HAS_TEST = False
+    from asynctest.mock import create_autospec, Mock
+
+    HAS_TEST = True
+except (ImportError, ModuleNotFoundError):
+    try:
+        from mock import create_autospec as mock_create_autospec, Mock
+
+        HAS_TEST = True
+
+        def create_autospec(spec, *args, **kwargs):
+            if iscoroutinefunction(spec):
+                raise Exception(
+                    "MockHub requires asynctest in order to mock async functions"
+                )
+            return mock_create_autospec(spec, *args, **kwargs)
+
+    except (ImportError, ModuleNotFoundError):
+        ...
+
+# Import pop libs
+from pop.contract import Contracted
+from pop.loader import LoadedMod
+from pop.hub import Hub, Sub
+from typing import Any, Callable, Tuple
+
+
+def __virtual__(hub: Hub) -> Tuple[bool, str]:
+    return HAS_TEST, "Async pop testing libs are not available"
+
+
+class _LookUpTable:
+    def __init__(self, *args, **kwargs):
+        self._lut = {}
+        super().__init__(*args, **kwargs)
+
+    def __contains__(self, key: str):
+        return id(key) in self._lut
+
+    def __setitem__(self, key: str, value: Any):
+        self._lut[id(key)] = value
+
+    def __getitem__(self, key: str):
+        return self._lut[id(key)]
+
+    def __delitem__(self, key: str):
+        del self._lut[id(key)]
+
+    def __len__(self):
+        return len(self._lut)
+
+
+class _LazyPop:
+    __lazy_classes = [Hub, Sub, LoadedMod]
+    _hub_id = object()  # just a unique object for our lut storage
+    _lazy_hub_id = object()
+
+    class __Lazy:
+        pass
+
+    def __init__(self, obj, lut=None):
+        if isinstance(obj, Hub):
+            lut = _LookUpTable()
+            lut[self._hub_id] = obj
+            lut[self._lazy_hub_id] = self
+            lut[obj] = self
+        elif isinstance(obj, Sub):
+            obj._load_all()
+
+        self.__lut = lut
+        self.__obj = obj
+        for attr_name in self.__attr_names():
+            setattr(self, attr_name, _LazyPop.__Lazy)
+
+    def _hub(self):
+        return self.__lut[self._hub_id]
+
+    def _lazy_hub(self):
+        return self.__lut[self._lazy_hub_id]
+
+    def __attr_names(self):
+        # TODO: '_' - is this actually right? what should I really expose?
+        attrs = [attr for attr in self.__obj.__dict__ if not attr.startswith("_")]
+
+        if isinstance(self.__obj, Hub):
+            attrs += list(self.__obj._subs)
+        elif isinstance(self.__obj, Sub):
+            attrs += list(self.__obj._loaded)
+            attrs += list(self.__obj._subs)
+        elif isinstance(self.__obj, LoadedMod):
+            attrs += list(self.__obj._attrs)
+        else:
+            raise Exception(
+                "Standard objects should not be lazy: {}".format(str(self.__obj))
+            )
+
+        return attrs
+
+    def _find_subs(self):
+        i = 0
+        subs = [(s._subname, s) for s in self._hub()]
+        while i < len(subs):
+            for child in subs[i][1]._subs:
+                subs.append((".".join([subs[i][0], child]), getattr(subs[i][1], child)))
+            i += 1
+        return subs
+
+    def _find_module_from_file(self, file):
+        for path, sub in self._find_subs():
+            try:
+                mod = sub._vmap[file]
+                return ".".join([path, mod]), getattr(sub, mod)
+            except (AttributeError, KeyError):
+                pass
+        else:
+            raise Exception("Module not loaded on hub.")
+
+    def _reset(self):
+        # A potential issue - we don't do reference counting, so it's *possible*
+        #  that an object we're clearing out has been accessed via two places on
+        #  the test hub:
+        #
+        #     mock_hub.OBJ.return_value = True
+        #     mock_hub.pop.OBJ
+        #
+        #  If VAL is the same object on the real hub, and is accessed from *both*
+        #   places on a test hub, mock_hub.pop._reset() will break the coupling -
+        #   mock_hub.VAL and mock_hub.pop.VAL will then refer to different objects.
+        #  Fixing this requires storing back-references in the LUT. (TODO)
+        #  Problems arising this should be rare and also fairly obvious.
+
+        # first, reset items with entries in the LUT
+        items = list(self.__dict__.items())
+        for k, v in items:
+            orig = getattr(self.__obj, k, None)
+            if orig in self.__lut and orig is not self.__obj:
+                if isinstance(v, _LazyPop):
+                    v._reset()
+                del self.__lut[orig]
+                setattr(self, k, _LazyPop.__Lazy)
+
+        # now remove any assignments that *wouldn't* be in the lut
+        # (attrs that weren't assigned on the backing object)
+        fresh_obj = self.__class__(self.__obj, lut={})
+        fresh_obj_keys = list(self.__dict__.keys())
+        for k in fresh_obj_keys:
+            if k not in fresh_obj.__dict__:
+                del self.__dict__[k]
+
+    def __setattr__(self, key, value):
+        if isinstance(value, _LazyPop) and value.__class__ is not self.__class__:
+            if value.__obj in self.__lut:
+                # we've previously touched this item, we need to clear it out.
+                self.__lut[value.__obj]._reset()
+            # we are constructing a hybrid _LazyPop - copy the type of the value but nothing else
+            value = value.__class__(value.__obj, self.__lut)
+            self.__lut[value.__obj] = value
+        if isinstance(value, Contracted) and value.hub is not self._lazy_hub():
+            # We need to update the Contracted to use our parent hub
+            value = copy.copy(value)
+            value.hub = self._lazy_hub()
+            # we don't update the lut because we don't know what the *original is *
+        if value.__class__ in self.__lazy_classes and "__obj" not in key:
+            raise TypeError(
+                "Mixing of real and test hubs is not supported. "
+                "Contracteds (hub.sub.mod.func) are supported."
+            )
+
+        super().__setattr__(key, value)
+
+    def __getattribute__(self, item):
+        if item and not item.strip("_"):  # only contains underscores, resolve 'this'
+            stack = inspect.stack(0)
+            file = stack[1].filename
+            path, mod = self._find_module_from_file(file)
+
+            # go up N steps
+            parts = path.split(".")
+            resolved_path = parts[0 : len(parts) - len(item) + 1]
+            if resolved_path:
+                orig = getattr(self._hub(), ".".join(resolved_path))
+            else:
+                orig = self._hub()
+
+            # find/create attr, return
+            attr = self._orig_to_attr(orig)
+            self.__lut[orig] = attr
+            return attr
+
+        if "." in item:
+            result = self
+            for part in item.split(".").copy():
+                result = getattr(result, part)
+            return result
+
+        attr = super().__getattribute__(item)
+
+        if attr is _LazyPop.__Lazy:
+            orig = getattr(self.__obj, item)
+            attr = self._orig_to_attr(orig)
+
+            self.__lut[orig] = attr
+            super().__setattr__(item, attr)  # bypass our custom setattr
+
+        return attr
+
+    def _orig_to_attr(self, orig):
+        if orig in self.__lut:
+            attr = self.__lut[orig]
+        elif [True for cls in self.__lazy_classes if isinstance(orig, cls)]:
+            attr = self.__class__(orig, self.__lut)
+        elif isinstance(orig, Contracted):
+            attr = self._mock_function(orig)
+        else:
+            attr = self._mock_attr(orig)
+        return attr
+
+    def _mock_attr(self, a):
+        return create_autospec(a, spec_set=True)
+
+    def _mock_function(self, f):
+        raise NotImplementedError()
+
+
+def strip_hub(f: Callable) -> Hub:
+    """
+    returns a no-op function with the same function signature... minus the first parameter (hub).
+    """
+    if inspect.iscoroutinefunction(f):
+        newf = "async "
+    else:
+        newf = ""
+    newf += "def {}(".format(f.__name__)
+    params = inspect.signature(f).parameters
+    new_params = []
+    for param in params:
+        if params[param].kind is inspect.Parameter.VAR_POSITIONAL:
+            new_params.append("*{}".format(param))
+        elif params[param].kind is inspect.Parameter.VAR_KEYWORD:
+            new_params.append("**{}".format(param))
+        else:
+            new_params.append(param)
+        if params[param].default is not inspect.Parameter.empty:
+            new_params[-1] += '="has default"'
+    newf += ", ".join(new_params[1:])  # skip hub
+    newf += "): pass"
+
+    scope = {}
+    exec(newf, scope)
+
+    return scope[f.__name__]
+
+
+def mock_hub(hub: Hub) -> "MockHub":
+    return MockHub(hub)
+
+
+class MockHub(_LazyPop):
+    """
+    Provides mocks mirroring a real hub::
+
+        hub.sub.mod.fn()  # mock
+        hub.sub.mod.attr  # mock
+    """
+
+    def _mock_function(self, f: Contracted) -> Callable:
+        afunc = create_autospec(strip_hub(f.func), spec_set=True)
+        afunc.__signature__ = f.signature
+        return afunc
+
+
+def fn_hub(hub: Hub) -> "NoContractHub":
+    return NoContractHub(hub)
+
+
+class NoContractHub(_LazyPop):
+    """
+    Provides access to real functions, bypassing contracts and mocking attributes::
+
+        hub.sub.mod.fn()  # executes real function, no contracts
+        hub.sub.mod.attr  # mock
+    """
+
+    def _mock_function(self, f: Contracted) -> Contracted:
+        return Contracted(
+            hub=self._lazy_hub(),
+            contracts=None,
+            func=f.func,
+            ref=f.ref,
+            name=f.__name__,
+        )
+
+
+def mock_contracted(contract_hub, c: Contracted) -> Contracted:
+    mock_func = create_autospec(c.func, spec_set=True)
+    mock_func.__signature__ = c.signature  # required for python 3.6
+    mock_func.__module__ = c.func.__module__
+    mock_func.__dict__.update(copy.deepcopy(c.func.__dict__))
+    return Contracted(contract_hub, c.contracts, mock_func, c.ref, c.__name__)
+
+
+class ContractHub(_LazyPop):
+    """
+    Runs a call through the contract system, but the function is a mock. Mostly useful for integration tests:
+
+        hub.sub.mod.fn()  # executes mock function, real contracts
+        hub.sub.mod.attr  # mock
+
+    You can verify what parameters are passed to a function after going through loaded contracts::
+
+        contract_hub.sub.mod.fn('foo')
+        assert contract_hub.sub.mod.fn.called_with('bar')
+
+    --------------------------------
+
+    You can view or modify the contracts that will be executed on one function for a test - but first:
+    MODIFYING CONTRACTS THIS WAY IS NOT SAFE ON REAL HUBS AND OTHER TESTING HUB VARIANTS!
+
+    I have previously thought of modifying contracts with mocks, only to realize what I really want is to
+    unit test a specific contract. Think twice before using this functionality.
+
+    --------------------------------
+
+    The contract modules are visible via hub.sub.mod.fn.contracts, and the contract functions that will
+    be called, wrapping fn are visible via hub.sub.mod.fn.contract_functions. It is safe to modify the
+    contracts list or contract_functions dict only on a ContractHub.
+
+    Examine that the first contract function to be called is 'foo.pre_fn', then bypass it::
+
+        assert contract_hub.sub.mod.fn.contract_functions['pre'][0].__module__ is 'foo'
+        assert contract_hub.sub.mod.fn.contract_functions['pre'][0].__name__ is 'pre_fn'
+        hub.sub.mod.fn.contract_functions['pre'][0] = create_autospec(hub.sub.mod.fn.contract_functions['pre'][0])
+
+    Assert that one contract will be called before another::
+
+        assert contract_hub.sub.mod.fn.contracts.index(contract1) < contract_hub.sub.mod.fn.contracts.index(contract2)
+    """
+
+    def _mock_function(self, f: Contracted) -> Contracted:
+        return mock_contracted(self._lazy_hub(), f)
+
+
+def mock_attr_hub(hub: Hub) -> "MockAttrHub":
+    return MockAttrHub(hub)
+
+
+class MockAttrHub(_LazyPop):
+    """
+    Provides an almost-normal hub.
+
+    Contracts and functions are executed, but all attrs are mocked.
+    """
+
+    def _mock_function(self, f) -> Contracted:
+        return Contracted(
+            hub=self._lazy_hub(),
+            contracts=f.contracts,
+            func=f.func,
+            ref=f.ref,
+            name=f.__name__,
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/verify.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/verify.py
new file mode 100644
index 0000000..454a4ff
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/pop/verify.py
@@ -0,0 +1,18 @@
+"""
+Routines to verify the working environment etc.
+"""
+# Import python libs
+import os
+import pop.hub
+
+
+def env(hub: "pop.hub.Hub"):
+    """
+    Verify that the directories specified in the system exist
+    """
+    for key in hub.opts:
+        if key.endswith("_dir"):
+            try:
+                os.makedirs(hub.opts[key])
+            except OSError:
+                pass
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/proc/init.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/proc/init.py
new file mode 100644
index 0000000..516ecc8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/proc/init.py
@@ -0,0 +1,141 @@
+"""
+The Proc sub is used to spin up worker processes that run hub referenced
+coroutines.
+"""
+# Import python libs
+import os
+import sys
+import atexit
+import itertools
+import asyncio
+import subprocess
+
+# Import third party libs
+import msgpack
+import pop.hub
+
+
+def __init__(hub: "pop.hub.Hub"):
+    """
+    Create constants used by the client and server side of procs
+    """
+    hub.proc.DELIM = b"d\xff\xcfCO)\xfe="
+    hub.proc.D_FLAG = b"D"
+    hub.proc.I_FLAG = b"I"
+    hub.proc.Workers = {}
+    hub.proc.WorkersIter = {}
+    hub.proc.WorkersTrack = {}
+
+
+def _get_cmd(hub: "pop.hub.Hub", ind, ref, ret_ref, sock_dir):
+    """
+    Return the shell command to execute that will start up the worker
+    """
+    code = "import sys; "
+    code += "import pop.hub; "
+    code += "hub = pop.hub.Hub(); "
+    code += 'hub.pop.sub.add("pop.mods.proc"); '
+    code += f'hub.proc.worker.start("{sock_dir}", "{ind}", "{ref}", "{ret_ref}")'
+    cmd = f"{sys.executable} -c '{code}'"
+    return cmd
+
+
+def mk_proc(hub: "pop.hub.Hub", ind, workers, ret_ref, sock_dir):
+    """
+    Create the process and add it to the passed in workers dict at the
+    specified index
+    """
+    ref = os.urandom(3).hex() + ".sock"
+    workers[ind] = {"ref": ref}
+    workers[ind]["path"] = os.path.join(sock_dir, ref)
+    cmd = _get_cmd(hub, ind, ref, ret_ref, sock_dir)
+    workers[ind]["proc"] = subprocess.Popen(cmd, shell=True)
+    workers[ind]["pid"] = workers[ind]["proc"].pid
+
+
+async def pool(
+    hub: "pop.hub.Hub", num, name: str = "Workers", callback=None, sock_dir=None
+):
+    """
+    Create a new local pool of process based workers
+
+    :param num: The number of processes to add to this pool
+    :param ref: The location on the hub to create the Workers dict used to
+        store the worker pool, defaults to `hub.pop.proc.Workers`
+    :param callback: The pop ref to call when the process communicates
+        back
+    """
+    ret_ref = os.urandom(3).hex() + ".sock"
+    ret_sock_path = os.path.join(sock_dir, ret_ref)
+    if not hasattr(hub.proc, "Tracker"):
+        hub.proc.init.mk_tracker()
+    workers = {}
+    if callback:
+        await asyncio.start_unix_server(
+            hub.proc.init.ret_work(callback), path=ret_sock_path
+        )
+    for ind in range(num):
+        hub.proc.init.mk_proc(ind, workers, ret_ref, sock_dir)
+    w_iter = itertools.cycle(workers)
+    hub.proc.Workers[name] = workers
+    hub.proc.WorkersIter[name] = w_iter
+    hub.proc.WorkersTrack[name] = {"subs": [], "ret_ref": ret_ref, "sock_dir": sock_dir}
+    up = set()
+    while True:
+        for ind in workers:
+            if os.path.exists(workers[ind]["path"]):
+                up.add(ind)
+        if len(up) == num:
+            break
+        await asyncio.sleep(0.01)
+    # TODO: This seems to be spawning extra procs, this should be fixed
+    # asyncio.ensure_future(hub.proc.init.maintain(name))
+
+
+async def maintain(hub: "pop.hub.Hub", name):
+    """
+    Keep an eye on these processes
+    """
+    workers = hub.proc.Workers[name]
+    while True:
+        for ind, data in workers.items():
+            if not data["proc"].poll():
+                hub.proc.init.mk_proc(ind, workers)
+        await asyncio.sleep(2)
+
+
+def mk_tracker(hub: "pop.hub.Hub"):
+    """
+    Create the process tracker, this simply makes a data structure to hold
+    process references and sets them to be terminated when the system is
+    shutdown.
+    """
+    hub.proc.Tracker = True
+    atexit.register(hub.proc.init.clean)
+
+
+def clean(hub: "pop.hub.Hub"):
+    """
+    Clean up the processes registered in the tracker
+    """
+    for name, workers in hub.proc.Workers.items():
+        for ind in workers:
+            workers[ind]["proc"].terminate()
+
+
+def ret_work(hub: "pop.hub.Hub", callback):
+    async def work(reader, writer):
+        """
+        Process the incoming work
+        """
+        inbound = await reader.readuntil(hub.proc.DELIM)
+        inbound = inbound[: -len(hub.proc.DELIM)]
+        payload = msgpack.loads(inbound, raw=False)
+        ret = await callback(payload)
+        ret = msgpack.dumps(ret, use_bin_type=True)
+        ret += hub.proc.DELIM
+        writer.write(ret)
+        await writer.drain()
+        writer.close()
+
+    return work
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/proc/run.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/proc/run.py
new file mode 100644
index 0000000..ad0b481
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/proc/run.py
@@ -0,0 +1,180 @@
+"""
+Execute functions or load subs on the workers in the named worker pool
+"""
+# import python libs
+import asyncio
+import os
+
+# Import third party libs
+import msgpack
+import pop.hub
+
+
+async def add_sub(hub: "pop.hub.Hub", worker_name, *args, **kwargs):
+    """
+    Tell all of the worker in the named pool to load the given sub,
+
+    This function takes all of the same arguments as hub.pop.sub.add
+    """
+    ret = {}
+    workers = hub.proc.Workers[worker_name]
+    for ind in workers:
+        payload = {"fun": "sub", "args": args, "kwargs": kwargs}
+        # TODO: Make these futures to the run at the same time
+        async for chunk in hub.proc.run.send(workers[ind], payload):
+            ret[ind] = chunk
+    hub.proc.WorkersTrack[worker_name]["subs"].append({"args": args, "kwargs": kwargs})
+    return ret
+
+
+async def add_proc(hub: "pop.hub.Hub", worker_name):
+    """
+    Add a single process to the worker pool, also make sure that
+    """
+    # grab and extrapolate the data we need
+    ret_ref = hub.proc.WorkersTrack[worker_name]["ret_ref"]
+    sock_dir = hub.proc.WorkersTrack[worker_name]["sock_dir"]
+    workers = hub.proc.Workers[worker_name]
+    ind = len(workers) + 1
+    for s_ind in range(len(workers) + 1):
+        if s_ind not in workers:
+            ind = s_ind
+    hub.proc.init.mk_proc(ind, workers, ret_ref, sock_dir)
+    # Make sure the process is up with a live socket
+    while True:
+        if os.path.exists(workers[ind]["path"]):
+            break
+        await asyncio.sleep(0.01)
+    # Add all of the subs that have been added to processes in this pool
+    for sub in hub.proc.WorkersTrack[worker_name]["subs"]:
+        payload = {"fun": "sub", "args": sub["args"], "kwargs": sub["kwargs"]}
+        async for chunk in hub.proc.run.send(workers[ind], payload):
+            pass
+    return ind
+
+
+async def pub(hub: "pop.hub.Hub", worker_name, func_ref, *args, **kwargs):
+    """
+    Execute the given function reference on ALL the workers in the given
+    worker pool and return the return data from each.
+
+    Pass in the arguments for the function, keep in mind that the sub needs
+    to be loaded into the workers for a function to be available via
+    hub.proc.run.add_sub
+    """
+    workers = hub.proc.Workers[worker_name]
+    ret = {}
+    for ind in workers:
+        payload = {"fun": "run", "ref": func_ref, "args": args, "kwargs": kwargs}
+        # TODO: Make these futures to the run at the same time
+        async for chunk in hub.proc.run.send(workers[ind], payload):
+            ret[ind] = chunk
+    return ret
+
+
+async def set_attr(hub: "pop.hub.Hub", worker_name, ref, value):
+    """
+    Set the given attribute to the given location on the hub of all
+    worker procs
+    """
+    workers = hub.proc.Workers[worker_name]
+    ret = {}
+    for ind in workers:
+        payload = {"fun": "setattr", "ref": ref, "value": value}
+        # TODO: Make these futures to the run at the same time
+        async for chunk in hub.proc.run.send(workers[ind], payload):
+            ret[ind] = chunk
+    return ret
+
+
+async def ind_func(hub: "pop.hub.Hub", worker_name, _ind, func_ref, *args, **kwargs):
+    """
+    Execute the function on the indexed process within the named worker pool
+    """
+    workers = hub.proc.Workers[worker_name]
+    worker = workers[_ind]
+    payload = {"fun": "run", "ref": func_ref, "args": args, "kwargs": kwargs}
+    async for ret in hub.proc.run.send(worker, payload):
+        return ret
+
+
+async def func(hub: "pop.hub.Hub", worker_name, func_ref, *args, **kwargs):
+    """
+    Execute the given function reference on one worker in the given worker
+    pool and return the return data.
+
+    Pass in the arguments for the function, keep in mind that the sub needs
+    to be loaded into the workers for a function to be available via
+    hub.proc.run.add_sub
+    """
+    ind, coro = await hub.proc.run.track_func(worker_name, func_ref, *args, **kwargs)
+    return await coro
+
+
+async def track_func(hub: "pop.hub.Hub", worker_name, func_ref, *args, **kwargs):
+    """
+    Run a function and return the index of the worker that the function was
+    executed on and a coroutine to track
+    """
+    w_iter = hub.proc.WorkersIter[worker_name]
+    ind = next(w_iter)
+    coro = hub.proc.run.ind_func(worker_name, ind, func_ref, *args, **kwargs)
+    return ind, coro
+
+
+async def gen(hub: "pop.hub.Hub", worker_name, func_ref, *args, **kwargs):
+    """
+    Execute a generator function reference within one worker within the given
+    worker pool.
+
+    Like `func` the sub needs to be made available to all workers first
+    """
+    ind, coro = await hub.proc.run.track_gen(worker_name, func_ref, *args, **kwargs)
+    async for chunk in coro:
+        yield chunk
+
+
+async def track_gen(hub: "pop.hub.Hub", worker_name, func_ref, *args, **kwargs):
+    """
+    Return an iterable coroutine and the index executed on
+    """
+    w_iter = hub.proc.WorkersIter[worker_name]
+    ind = next(w_iter)
+    coro = hub.proc.run.ind_gen(worker_name, ind, func_ref, *args, **kwargs)
+    return ind, coro
+
+
+async def ind_gen(hub: "pop.hub.Hub", worker_name, _ind, func_ref, *args, **kwargs):
+    """
+    run the given iterator on the defined index
+    """
+    workers = hub.proc.Workers[worker_name]
+    worker = workers[_ind]
+    payload = {"fun": "gen", "ref": func_ref, "args": args, "kwargs": kwargs}
+    async for chunk in hub.proc.run.send(worker, payload):
+        yield chunk
+
+
+async def send(hub: "pop.hub.Hub", worker, payload):
+    """
+    Send the given payload to the given worker, yield iterations based on the
+    returns from the remote.
+    """
+    mp = msgpack.dumps(payload, use_bin_type=True)
+    mp += hub.proc.DELIM
+    reader, writer = await asyncio.open_unix_connection(path=worker["path"])
+    writer.write(mp)
+    await writer.drain()
+    final_ret = True
+    while True:
+        ret = await reader.readuntil(hub.proc.DELIM)
+        p_ret = ret[: -len(hub.proc.DELIM)]
+        i_flag = p_ret[-1:]
+        ret = msgpack.loads(p_ret[:-1], raw=False)
+        if i_flag == hub.proc.D_FLAG:
+            # break for the end of the sequence
+            break
+        yield ret
+        final_ret = False
+    if final_ret:
+        yield ret
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/mods/proc/worker.py b/python3-vckonline/lib/python3.8/site-packages/pop/mods/proc/worker.py
new file mode 100644
index 0000000..8e97fd8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/mods/proc/worker.py
@@ -0,0 +1,168 @@
+"""
+This module is used to manage the process started up by the pool. Work in this
+module is used to manage the worker process itself and not other routines on
+the hub this process was derived from
+
+This is an exec, not a fork! This is a fresh memory space!
+"""
+# Import python libs
+import os
+import types
+import asyncio
+import pop.hub
+
+# Import third party libs
+import msgpack
+
+# TODO: The workers should detect if their controlling process dies and terminate by themselves
+# The controlling process will kill them when it exists, but if it exists hard then the workers
+# Should be able to also clean themselves up
+
+
+def start(hub: "pop.hub.Hub", sock_dir, ind, ref, ret_ref):
+    """
+    This function is called by the startup script to create a worker process
+
+    :NOTE: This is a new process started from the shell, it does not have any
+    of the process namespace from the creating process.
+    This is an EXEC, NOT a FORK!
+    """
+    hub.proc.SOCK_DIR = sock_dir
+    hub.proc.REF = ref
+    hub.proc.SOCK_PATH = os.path.join(sock_dir, ref)
+    hub.proc.RET_REF = ret_ref
+    hub.proc.RET_SOCK_PATH = os.path.join(sock_dir, ret_ref)
+    hub.proc.IND = ind
+    hub.pop.loop.start(hub.proc.worker.hold(), hub.proc.worker.server())
+
+
+async def hold(hub: "pop.hub.Hub"):
+    """
+    This function just holds the loop open by sleeping in a while loop
+    """
+    while True:
+        await asyncio.sleep(60)
+
+
+async def server(hub: "pop.hub.Hub"):
+    """
+    Start the unix socket server to receive commands
+    """
+    await asyncio.start_unix_server(hub.proc.worker.work, path=hub.proc.SOCK_PATH)
+
+
+async def work(hub: "pop.hub.Hub", reader, writer):
+    """
+    Process the incoming work
+    """
+    inbound = await reader.readuntil(hub.proc.DELIM)
+    inbound = inbound[: -len(hub.proc.DELIM)]
+    if msgpack.version < (1, 0, 0):
+        payload = msgpack.loads(inbound, encoding="utf-8")
+    else:
+        payload = msgpack.loads(inbound)
+    ret = b""
+    if "fun" not in payload:
+        ret = {"err": "Invalid format"}
+    elif payload["fun"] == "sub":
+        # Time to add a sub to the hub!
+        try:
+            hub.proc.worker.add_sub(payload)
+            ret = {"status": True}
+        except Exception as exc:
+            ret = {"status": False, "exc": str(exc)}
+    elif payload["fun"] == "run":
+        # Time to do some work!
+        try:
+            ret = await hub.proc.worker.run(payload)
+        except Exception as exc:
+            ret = {"status": False, "exc": str(exc)}
+    elif payload["fun"] == "gen":
+        ret = await hub.proc.worker.gen(payload, reader, writer)
+    elif payload["fun"] == "setattr":
+        ret = await hub.proc.worker.set_attr(payload)
+    ret = msgpack.dumps(ret, use_bin_type=True)
+    ret += hub.proc.D_FLAG
+    ret += hub.proc.DELIM
+    writer.write(ret)
+    await writer.drain()
+    writer.close()
+
+
+def add_sub(hub: "pop.hub.Hub", payload):
+    """
+    Add a new sub onto the hub for this worker
+    """
+    hub.pop.sub.add(*payload["args"], **payload["kwargs"])
+
+
+async def gen(hub: "pop.hub.Hub", payload, reader, writer):
+    """
+    Run a generator and yield back the returns. Supports a generator and an
+    async generator
+    """
+    ref = payload.get("ref")
+    args = payload.get("args", [])
+    kwargs = payload.get("kwargs", {})
+    ret = hub.pop.ref.last(ref)(*args, **kwargs)
+    if isinstance(ret, types.AsyncGeneratorType):
+        async for chunk in ret:
+            rchunk = msgpack.dumps(chunk, use_bin_type=True)
+            rchunk += hub.proc.I_FLAG
+            rchunk += hub.proc.DELIM
+            writer.write(rchunk)
+            await writer.drain()
+    elif isinstance(ret, types.GeneratorType):
+        for chunk in ret:
+            rchunk = msgpack.dumps(chunk, use_bin_type=True)
+            rchunk += hub.proc.I_FLAG
+            rchunk += hub.proc.DELIM
+            writer.write(rchunk)
+            await writer.drain()
+    elif asyncio.iscoroutine(ret):
+        return await ret
+    else:
+        return ret
+    return ""
+
+
+async def run(hub: "pop.hub.Hub", payload):
+    """
+    Execute the given payload
+    """
+    ref = payload.get("ref")
+    args = payload.get("args", [])
+    kwargs = payload.get("kwargs", {})
+    ret = hub.pop.ref.last(ref)(*args, **kwargs)
+    if asyncio.iscoroutine(ret):
+        return await ret
+    return ret
+
+
+async def set_attr(hub: "pop.hub.Hub", payload):
+    """
+    Set the named attribute to the hub
+    """
+    ref = payload.get("ref")
+    value = payload.get("value")
+    hub.pop.ref.create(ref, value)
+
+
+async def ret(hub: "pop.hub.Hub", payload):
+    """
+    Send a return payload to the spawning process. This return will be tagged
+    with the index of the process that returned it
+    """
+    payload = {"ind": hub.proc.IND, "payload": payload}
+    mp = msgpack.dumps(payload, use_bin_type=True)
+    mp += hub.proc.DELIM
+    reader, writer = await asyncio.open_unix_connection(path=hub.proc.RET_SOCK_PATH)
+    writer.write(mp)
+    await writer.drain()
+    ret = await reader.readuntil(hub.proc.DELIM)
+    ret = ret[: -len(hub.proc.DELIM)]
+    writer.close()
+    if msgpack.version < (1, 0, 0):
+        return msgpack.loads(ret, encoding="utf-8")
+    else:
+        return msgpack.loads(ret)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/scanner.py b/python3-vckonline/lib/python3.8/site-packages/pop/scanner.py
new file mode 100644
index 0000000..a9dfe1a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/scanner.py
@@ -0,0 +1,58 @@
+# -*- coding: utf-8 -*-
+"""
+Used to scan the given directories for loadable files
+"""
+# Import python libs
+import os
+import importlib.machinery
+import collections
+from typing import Any, Dict, Iterable
+
+PY_END = (".py", ".pyc", ".pyo")
+PYEXT_END = tuple(importlib.machinery.EXTENSION_SUFFIXES)
+CYTHON_END = (".pyx",)
+SKIP_DIRNAMES = ("__pycache__",)
+
+
+def scan(dirs: Iterable[str]) -> Dict[str, Dict[str, Any]]:
+    """
+    :param dirs: A list of locations to search for importables files
+    :return A description of importable files
+    """
+    ret = collections.OrderedDict()
+    ret["python"] = collections.OrderedDict()
+    ret["cython"] = collections.OrderedDict()
+    ret["ext"] = collections.OrderedDict()
+    ret["imp"] = collections.OrderedDict()
+    for dir_ in dirs:
+        for fn_ in os.listdir(dir_):
+            _apply_scan(ret, dir_, fn_)
+    return ret
+
+
+def _apply_scan(
+    ret: Dict[str, Dict[str, Any]], dir_: str, fn_: str
+) -> None or Dict[str, Dict[str, Any]]:
+    """
+    Convert the scan data into paths and refs
+    :param ret: The result of a scan()
+    :param dir_:
+    :param fn_:
+    """
+    if fn_.startswith("_"):
+        return
+    if os.path.basename(dir_) in SKIP_DIRNAMES:
+        return
+    full = os.path.join(dir_, fn_)
+    if "." not in full:
+        return
+    bname = full[: full.rindex(".")]
+    if fn_.endswith(PY_END):
+        if bname not in ret["python"]:
+            ret["python"][bname] = {"path": full}
+    if fn_.endswith(CYTHON_END):
+        if bname not in ret["cython"]:
+            ret["cython"][bname] = {"path": full}
+    if fn_.endswith(PYEXT_END):
+        if bname not in ret["ext"]:
+            ret["ext"][bname] = {"path": full}
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/scripts.py b/python3-vckonline/lib/python3.8/site-packages/pop/scripts.py
new file mode 100644
index 0000000..4b2d7ec
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/scripts.py
@@ -0,0 +1,28 @@
+#!/usr/bin/python3
+
+import pop.hub
+
+
+def pop_seed():
+    CONFIG = {
+        "seed_name": {
+            "positional": True,
+            "help": "The name of the project that is being created",
+        },
+        "type": {
+            "default": "p",
+            "options": ["-t"],
+            "help": 'The type of project to build, by default make a standalone project, but for a vetical app project pass a "v"',
+        },
+        "dyne": {
+            "options": ["-d"],
+            "default": [],
+            "nargs": "*",
+            "help": "A space delimited list of additional dynamic names for vertical app-merging",
+        },
+    }
+
+    hub = pop.hub.Hub()
+    hub.pop.sub.add("pop.mods.conf")
+    hub.opts = hub.conf.reader.read(CONFIG)
+    hub.pop.seed.new()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/verify.py b/python3-vckonline/lib/python3.8/site-packages/pop/verify.py
new file mode 100644
index 0000000..63b69d8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/verify.py
@@ -0,0 +1,135 @@
+# Import python libs
+import inspect
+
+# Import pop libs
+import pop.exc
+import pop.hub
+import pop.loader
+from typing import Any, Callable, Dict, Iterable, List
+
+
+def contract(
+    hub: "pop.hub.Hub",  # pylint: disable=unused-argument
+    raws: Iterable["pop.loader.LoadedMod"],
+    mod: "pop.loader.LoadedMod",
+):
+    """
+    Verify module level contract - functions only
+    :param hub: The redistributed pop central hub
+    :param raws: A list of loaded modules with contracts
+    :param mod: A loader module
+    """
+    sig_errs = []
+    sig_miss = []
+    mname = mod.__name__
+    for raw in raws:
+        if isinstance(raw, pop.loader.LoadError):
+            sig_errs.append(str(raw))
+            continue
+        else:
+            for fun in raw._funcs:
+                if fun.startswith("sig_"):
+                    tfun = fun[4:]
+                    if tfun not in mod._funcs:
+                        sig_miss.append(tfun)
+                        continue
+                    sig_errs.extend(sig(mod._funcs[tfun].func, raw._funcs[fun].func))
+    if sig_errs or sig_miss:
+        msg = ""
+        if sig_errs:
+            msg += f"Signature Errors in {mname}:\n"
+            for err in sig_errs:
+                msg += f"{err}\n"
+        if sig_miss:
+            msg += f"Signature Functions Missing in {mname}:\n"
+            for err in sig_miss:
+                msg += f"{err}\n"
+        msg = msg.strip()
+        raise pop.exc.ContractSigException(msg)
+
+
+def sig_map(ver: Callable) -> Dict[str, Any]:
+    """
+    Generates the map dict for the signature verification
+    """
+    vsig = inspect.signature(ver)
+    vparams = list(vsig.parameters.values())
+    vdat = {"args": [], "v_pos": -1, "kw": [], "kwargs": False, "ann": {}}
+    for ind in range(len(vparams)):
+        param = vparams[ind]
+        val = param.kind.value
+        name = param.name
+        if val == 0 or val == 1:
+            vdat["args"].append(name)
+            if param.default != inspect._empty:  # Is a KW, can be inside of **kwargs
+                vdat["kw"].append(name)
+        elif val == 2:
+            vdat["v_pos"] = ind
+        elif val == 3:
+            vdat["kw"].append(name)
+        elif val == 4:
+            vdat["kwargs"] = ind
+        if param.annotation != inspect._empty:
+            vdat["ann"][name] = param.annotation
+    return vdat
+
+
+def sig(func: Callable, ver: Callable) -> List[str]:
+    """
+    Takes 2 functions, the first function is verified to have a parameter signature
+    compatible with the second function
+    """
+    errors = []
+    fsig = inspect.signature(func)
+    fparams = list(fsig.parameters.values())
+    vdat = sig_map(ver)
+    arg_len = len(vdat["args"])
+    v_pos = False
+    for ind in range(len(fparams)):
+        param = fparams[ind]
+        val = param.kind.value
+        name = param.name
+        has_default = param.default != inspect._empty
+        ann = param.annotation
+        vann = vdat["ann"].get(name, inspect._empty)
+        if vann != ann:
+            errors.append(f'Parameter, "{name}" is type "{str(ann)}" not "{str(vann)}"')
+        if val == 2:
+            v_pos = True
+        if val == 0 or val == 1:
+            if ind >= arg_len:  # Past available positional args
+                if not vdat["v_pos"] == -1:  # Has a *args
+                    if ind >= vdat["v_pos"] and v_pos:
+                        # Invalid unless it is a kw
+                        if not name in vdat["kw"]:
+                            # Is a kw
+                            errors.append(f'Parameter "{name}" is invalid')
+                        if vdat["kwargs"] is False:
+                            errors.append(f'Parameter "{name}" not defined as kw only')
+                        continue
+                elif vdat["kwargs"] is not False and not has_default:
+                    errors.append(
+                        f'Parameter "{name}" is past available positional params'
+                    )
+                elif vdat["kwargs"] is False:
+                    errors.append(
+                        f'Parameter "{name}" is past available positional params'
+                    )
+            else:
+                v_param = vdat["args"][ind]
+                if v_param != name:
+                    errors.append(
+                        f'Parameter "{name}" does not have the correct name: {v_param}'
+                    )
+        if val == 2:
+            if ind < vdat["v_pos"]:
+                errors.append(
+                    f'Parameter "{name}" is not in the correct position for *args'
+                )
+        if val == 3:
+            if name not in vdat["kw"] and not vdat["kwargs"]:
+                errors.append(f'Parameter "{name}" is not available as a kwarg')
+        if val == 4:
+            if vdat["kwargs"] is False:
+                errors.append(f"Kwargs are not permitted as a parameter")
+    return errors
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop/version.py b/python3-vckonline/lib/python3.8/site-packages/pop/version.py
new file mode 100644
index 0000000..89a7166
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop/version.py
@@ -0,0 +1,2 @@
+# -*- coding: utf-8 -*-
+version = "15"
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/LICENSE b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/LICENSE
new file mode 100644
index 0000000..4547db2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/METADATA
new file mode 100644
index 0000000..7626d25
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/METADATA
@@ -0,0 +1,215 @@
+Metadata-Version: 2.1
+Name: pop-config
+Version: 6.11
+Summary: UNKNOWN
+Home-page: https://www.saltstack.com
+Author: Thomas S Hatch
+Author-email: thatch45@gmail.com
+License: UNKNOWN
+Platform: UNKNOWN
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Development Status :: 5 - Production/Stable
+Requires-Python: >=3.6
+Description-Content-Type: text/x-rst
+Requires-Dist: pop
+Requires-Dist: dict-toolbox
+Requires-Dist: aiologger[aiofiles]
+
+==========
+Pop Config
+==========
+
+Pop-config is the official tool to allow for creating and app-merging
+configuration options for `pop` projects. Plugin Oriented Programming
+presents a means to merge multiple applications together dynamically.
+This capabilities requires that the startup of these applications needs
+to be managed from within the programming paradigm. Since this is the case
+`pop-config` becomes a critical and hard requirement of `pop`.
+
+Pop-config is not just about being able to work with `pop` projects
+to facilitate app-merging, it has also been designed to make the startup
+of an application much simpler, and to make the expensive boiler plate
+of startup and configuration as transparent as possible. When making
+`pop` projects the idea is that projects are developed in very small
+chunks and are then dynamically merged together. So the creation of
+these mergeable apps needs to be quick and easy!
+
+Pop-config also solves a problem with configuration of applications,
+when making a new application, if you want robust configuration
+loading, you need to be able to take options from the command line,
+environment variables, and configuration files. Pop-config does all
+of this for you, and loads them in the correct order, all behind the
+scenes, making your life easier.
+
+Understanding the conf.py
+=========================
+
+Pop relies on a configuration file to manage how to merge apps, and
+also how to manage and merge configuration data. The data in this file
+is presented in 4 Python dictionaries and defines every aspect of
+configuration loading.
+
+The 4 dictionaries are called *CONFIG*, *CLI_CONFIG*, *SUBCOMMANDS*
+and *DYNE*. Each dictionary serves a specific purpose. Between them
+you can define how the cli arguments are presented, all configuration
+defaults, documentation, etc.
+
+The CONFIG Dictionary
+=====================
+
+The bulk of the configuration will be present in the *CONFIG* dictionary.
+all of your configuration options are defined here. Most entries in the
+*CONFIG* dictionary will be very simple and just expose the most basic
+values:
+
+.. code-block:: python
+
+    CONFIG = {
+        "name": {
+            "default": "frank",
+            "help": "Enter the name to use",
+        },
+    }
+
+This simple example presents the documentation for the configuration value
+and what the default value should be.
+
+Vertically app-merged projects can add config items to their parent dynes like so:
+
+.. code-block:: python
+
+    CONFIG = {
+        "new_item": {
+            "type": int,
+            "default": 1,
+            "dyne": "idem",
+        },
+    }
+
+Many more options can be used, but they will be covered in the reference
+document.
+
+The CLI_CONFIG Dictionary
+=========================
+
+Adding a configuration value does not make it appear on the command line.
+Each application can be extended to include command line options.
+Lets extend our earlier example to expose the "name" option as a command
+line argument:
+
+.. code-block:: python
+
+    CLI_CONFIG = {
+        "name": {},
+    }
+    CONFIG = {
+        "name": {
+            "default": "frank",
+            "help": "Enter the name to use",
+        },
+    }
+
+That's it! The "name" option is now available on the command line and can
+be used as `--name bob`.
+
+But what if we want it to be a positional argument? Simple! Just add the
+positional option to the *CLI_CONFIG*:
+
+.. code-block:: python
+
+    CLI_CONFIG = {
+        "name": {
+            "positional": True,
+        },
+    }
+    CONFIG = {
+        "name": {
+            "default": "frank",
+            "help": "Enter the name to use",
+        },
+    }
+
+You can inherit cli args from another project.  Say, for example that you want to implement the `--output` flag
+exactly the same way `rend` does, you can source it like this:
+
+.. code-block:: python
+
+    CLI_CONFIG = {
+        "output": {
+            "source": "rend",
+        },
+    }
+
+Many more options exist that allow you to control every aspect of the user's
+command line experience.
+
+The SUBCOMMANDS Dictionary
+==========================
+
+Sometimes it is desirable to have subcommands. Subcommands allow your CLI
+to work in a way similar to the git cli, where you have multiple routines
+that all can be called from a single command.
+
+Lets add a few more things to our example so that we can have subcommands.
+
+.. code-block:: python
+
+    CLI_CONFIG = {
+        "name": {
+            "subcommands": ["test", "apply"],
+        },
+        "weight": {},
+        "power": {
+            "subcommands": ["apply"],
+        },
+    }
+    CONFIG = {
+        "name": {
+            "default": "frank",
+            "help": "Enter the name to use",
+        },
+        "weight": {
+            "default": "150",
+            "help": "Enter how heavy it should be",
+        },
+        "power": {
+            "default": "100",
+            "help": "Enter how powerful it should be",
+        },
+    }
+
+    SUBCOMMANDS = {
+        "test": {
+            "help": "Used to test",
+            "desc": "When running in test mode, things will be tested",
+        },
+        "apply": {
+            "help": "Used to apply",
+            "desc": "When running in apply mode, things will be applied",
+        },
+    }
+
+
+In this example we see that the option `name` will be available under
+the subcommands `test` and `apply`. The option `power` will be available
+only under the subcommand `apply` and the option `weight` is globally
+available.
+
+The DYNE Dictionary
+===================
+
+The *DYNE* dictionary allows you to control what dynamic names your app is
+presenting to other `pop` projects. This name gets used not only inside
+of `pop-config` but also inside of `pop` to determine what plugin subsystems
+this application merges with. The *DYNE* system allows for your cli to be
+extended by third party code, enabling configuration options to be made
+available to your application via external code.
+
+The *DYNE* system is very powerful. But since it is not critical to getting
+started with `pop-config` it will be covered in more depth in another document.
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/RECORD
new file mode 100644
index 0000000..5d01673
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/RECORD
@@ -0,0 +1,50 @@
+../../../bin/conf,sha256=_UoeCXo_AQepxaj0N-psJ9QnqSx9n-SnEZnUZ39QgRo,254
+pop_config-6.11.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+pop_config-6.11.dist-info/LICENSE,sha256=gdjA1DOOrxZhmIBdFFWtPZ1j5woynQ4hdwZhGX9APlU,11349
+pop_config-6.11.dist-info/METADATA,sha256=ebONgTl2Oeqv9WOn_YhQPiSpyEBoa_qDqnI6C4S_7Ag,6680
+pop_config-6.11.dist-info/RECORD,,
+pop_config-6.11.dist-info/WHEEL,sha256=g4nMs7d-Xl9-xC9XovUrsDHGXt-FT0E17Yqo92DEfvY,92
+pop_config-6.11.dist-info/entry_points.txt,sha256=0TWjYa8To32XZBgNYBUFvwT4hzk3AgGuWv3c1Q2dYhs,45
+pop_config-6.11.dist-info/top_level.txt,sha256=O_uoo9jjIR_8ZkAN2W16jsTcYgX331ZDAgpX3_Lca_Q,11
+pop_config/__pycache__/conf.cpython-38.pyc,,
+pop_config/__pycache__/scripts.cpython-38.pyc,,
+pop_config/__pycache__/version.cpython-38.pyc,,
+pop_config/conf.py,sha256=y99Dss2lCLaTIYHyljJYbUxny7ce_-Ia8EZdbsdD9YY,1575
+pop_config/config/__pycache__/args.cpython-38.pyc,,
+pop_config/config/__pycache__/dirs.cpython-38.pyc,,
+pop_config/config/__pycache__/init.cpython-38.pyc,,
+pop_config/config/__pycache__/integrate.cpython-38.pyc,,
+pop_config/config/__pycache__/order.cpython-38.pyc,,
+pop_config/config/__pycache__/version.cpython-38.pyc,,
+pop_config/config/args.py,sha256=Kmc7bCrwpWvqjqZ-B09MMCyVuapjopsK36r7jlb8F60,7945
+pop_config/config/contracts/__pycache__/order.cpython-38.pyc,,
+pop_config/config/contracts/order.py,sha256=SBoZ4RauB0aT3DV2gLJrBuS2zT2sNASy2VBvLZ3ebE0,2832
+pop_config/config/dirs.py,sha256=EjTgDk_PaZIjG2lOgQocKgJkW25HPlypyeUMidUwlCE,3579
+pop_config/config/file/__pycache__/init.cpython-38.pyc,,
+pop_config/config/file/init.py,sha256=P5QjjsnSpLNncUNiAJklxmS-OR_lbwBk1MjI-Ut9I04,3753
+pop_config/config/init.py,sha256=X2FcLOqaG4iQJ8AKluQdtN_covIrfEb8fjt6_HKEIrw,314
+pop_config/config/integrate.py,sha256=plTnjp7rNthiDA73Czc99OzQCJMCeCmIf49aNJZC4A4,995
+pop_config/config/order.py,sha256=2akwfUETc7ykOaBH0n3R-g1JZvQDFhImNaFP9FMNb-E,1112
+pop_config/config/os/__pycache__/init.cpython-38.pyc,,
+pop_config/config/os/__pycache__/nix_os.cpython-38.pyc,,
+pop_config/config/os/init.py,sha256=8vsaCZKeygF8mY2AvRUhoiKs2E9ZdNOP2JLPrrYsNDM,884
+pop_config/config/os/nix_os.py,sha256=cu1BMCTpJRmE2kdAALWngGALe6vNP4HTk5P2sC4rMFY,488
+pop_config/config/render/__pycache__/cli.cpython-38.pyc,,
+pop_config/config/render/__pycache__/init.cpython-38.pyc,,
+pop_config/config/render/__pycache__/json_conf.cpython-38.pyc,,
+pop_config/config/render/__pycache__/toml_conf.cpython-38.pyc,,
+pop_config/config/render/__pycache__/yaml_conf.cpython-38.pyc,,
+pop_config/config/render/cli.py,sha256=xsBvFfmU2bHFwRA9ic3ndp-_V1r_jt3hSY0BFhtDqNA,922
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+pop_config/config/render/yaml_conf.py,sha256=HbWapt1fKY6N7dmxz7gZ_Rc2qRwZQvM8cXyXonbnxus,644
+pop_config/config/version.py,sha256=84sRrhHCY-jtBv0pTP_YJ5CNyNwopCQpSUTuA3H1zLI,443
+pop_config/log/__pycache__/async.cpython-38.pyc,,
+pop_config/log/__pycache__/basic.cpython-38.pyc,,
+pop_config/log/__pycache__/init.cpython-38.pyc,,
+pop_config/log/async.py,sha256=xvPy05lOT_7_CknUgI_v5QFQ184HiqjSUVAtOAqpy9s,4955
+pop_config/log/basic.py,sha256=LaYrWuyb978sMvwKxo2z1dVJVYibttCjrPHpkOSkJeQ,790
+pop_config/log/init.py,sha256=g0iEBhN8j45xm7pA0G9eVoQL6VaN276vibw_QHYYFvA,1042
+pop_config/scripts.py,sha256=J9jNfuQo2UjY8NKEAF1sd6lHAXlOLbUZOZ0cltyfS7Y,164
+pop_config/version.py,sha256=uak5NaQ3TPiRQiyGcARNfIWN0cRmOfwLMhxO4viN3nY,41
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/WHEEL
new file mode 100644
index 0000000..b552003
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/entry_points.txt b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/entry_points.txt
new file mode 100644
index 0000000..1946705
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/entry_points.txt
@@ -0,0 +1,3 @@
+[console_scripts]
+conf = conf.scripts:start
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/top_level.txt
new file mode 100644
index 0000000..326281a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config-6.11.dist-info/top_level.txt
@@ -0,0 +1 @@
+pop_config
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/__pycache__/conf.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pop_config/__pycache__/conf.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/conf.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/conf.py
new file mode 100644
index 0000000..4c69858
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/conf.py
@@ -0,0 +1,55 @@
+import os
+import sys
+
+CLI_CONFIG = {
+    "log_file": {"dyne": "__cli__"},
+    "log_level": {"dyne": "__cli__"},
+    "log_fmt_logfile": {"dyne": "__cli__"},
+    "log_fmt_console": {"dyne": "__cli__"},
+    "log_datefmt": {"dyne": "__cli__"},
+    "log_plugin": {"dyne": "__cli__"},
+}
+
+CONFIG = {
+    "log_file": {
+        "dyne": "__cli__",
+        "default": f"{os.path.splitext(os.path.split(sys.argv[0])[1])[0]}.log",
+        "help": "The location of the log file",
+        "group": "Logging Options",
+    },
+    "log_level": {
+        "dyne": "__cli__",
+        "default": "warning",
+        "help": "Set the log level, either quiet, info, warning, or error",
+        "group": "Logging Options",
+    },
+    "log_fmt_logfile": {
+        "dyne": "__cli__",
+        "default": "%(asctime)s,%(msecs)03d [%(name)-17s][%(levelname)-8s] %(message)s",
+        "help": "The format to be given to log file messages",
+        "group": "Logging Options",
+    },
+    "log_fmt_console": {
+        "dyne": "__cli__",
+        "default": "[%(levelname)-8s] %(message)s",
+        "help": "The log formatting used in the console",
+        "group": "Logging Options",
+    },
+    "log_datefmt": {
+        "dyne": "__cli__",
+        "default": "%H:%M:%S",
+        "help": "The date format to display in the logs",
+        "group": "Logging Options",
+    },
+    "log_plugin": {
+        "dyne": "__cli__",
+        "default": "basic",
+        "help": "The logging plugin to use",
+        "group": "Logging Options",
+    },
+}
+SUBCOMMANDS = {}
+DYNE = {
+    "config": ["config"],
+    "log": ["log"],
+}
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/args.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/args.py
new file mode 100644
index 0000000..74984eb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/args.py
@@ -0,0 +1,247 @@
+# -*- coding: utf-8 -*-
+"""
+Translate an options data structure into command line args
+"""
+
+# Import python libs
+import sys
+import inspect
+import argparse
+import dict_tools.update
+from typing import Any, Dict, List, Tuple
+
+
+def __init__(hub):
+    hub.config.args.DEFAULT = object()
+
+
+def _keys(opts):
+    """
+    Return the keys in the right order
+    """
+    return sorted(opts, key=lambda k: (opts[k].get("display_priority", sys.maxsize), k))
+
+
+def gather(
+    hub, raw: Dict[str, Any], cli: str, parse_cli: bool
+) -> Tuple[Dict[str, Any], Dict[str, Any]]:
+    """
+    Return the cli arguments as they are parsed
+    """
+    if not parse_cli:
+        return {}, {}
+    raw_cli = hub.config.args.get_cli(raw, cli)
+    hub.config.args.init_parser()
+    hub.config.args.subparsers(raw, cli)
+    hub.config.args.setup(raw_cli)
+    cli_args = hub.config.args.parse()
+    cli_args = hub.config.args.render(cli_args, raw_cli)
+    cli_args = hub.config.args.clean_defaults(cli_args)
+    return cli_args, raw_cli
+
+
+def clean_defaults(hub, cli_args: Dict[str, Any]) -> Dict[str, Any]:
+    """
+    If anyone did not pass in an argument then the key will match the
+    bad default and needs to be removed
+    """
+    ret = {}
+    for key, val in cli_args.items():
+        if val is not hub.config.args.DEFAULT:
+            ret[key] = val
+
+    return ret
+
+
+def init_parser(hub):
+    if "parser" not in hub.config.ARGS:
+        # Instantiate the parser
+        hub.config.ARGS["parser"] = argparse.ArgumentParser()
+
+
+def get_cli(hub, raw: Dict[str, Any], cli: str) -> Dict[str, Any]:
+    """
+    Gather the arguments that need to be parsed by the CLI
+    """
+    ret = {}
+    main = raw.get(cli, {}).get("CLI_CONFIG")
+    main_raw = raw.get(cli, {}).get("CONFIG")
+
+    for key, data in main.items():
+        ret[key] = {}
+        dict_tools.update.update(ret[key], data)
+        if key in main_raw:
+            dict_tools.update.update(ret[key], main_raw[key])
+        if "source" in data:
+            src = raw.get(data["source"], {}).get("CONFIG", {}).get(key)
+            if src is not None:
+                dict_tools.update.update(ret[key], src)
+        if "default" in ret[key]:
+            ret[key]["default"] = hub.config.args.DEFAULT
+    ret.update(hub.config.version.CONFIG)
+    return ret
+
+
+def subparsers(hub, raw: Dict[str, Any], cli: str) -> bool:
+    """
+    Look over the data and extract and set up the subparsers for subcommands
+    """
+    subs = raw.get(cli, {}).get("SUBCOMMANDS")
+    if not subs:
+        return True
+    hub.config.ARGS["sub"] = hub.config.ARGS["parser"].add_subparsers(
+        dest="_subparser_"
+    )
+    hub.config.ARGS["subs"] = {}
+    for arg in _keys(subs):
+        if arg in ("_argparser_",):
+            continue
+        comps = subs[arg]
+        kwargs = {}
+        if "help" in comps:
+            kwargs["help"] = comps["help"]
+        if "desc" in comps:
+            kwargs["description"] = comps["desc"]
+        hub.config.ARGS["subs"][arg] = hub.config.ARGS["sub"].add_parser(arg, **kwargs)
+    return True
+
+
+def setup(hub, raw_cli: Dict[str, Any]) -> Dict[str, Any]:
+    """
+    Take in a pre-defined dict and translate it to args
+
+    opts dict:
+        <arg>:
+            [group]: foo
+            [default]: bar
+            [action]: store_true
+            [options]: # arg will be turned into --arg
+              - '-A'
+              - '--cheese'
+            [choices]:
+              - foo
+              - bar
+              - baz
+            [nargs]: +
+            [type]: int
+            [dest]: cheese
+            help: Some great help message
+    """
+    # TODO: This should be broken up
+    defaults = {}
+    groups = {}
+    ex_groups = {}
+    for arg in _keys(raw_cli):
+        if arg in ("_argparser_",):
+            continue
+        comps = raw_cli[arg]
+        positional = comps.pop("positional", False)
+        if positional:
+            args = [arg]
+        else:
+
+            args = [f"--{arg.replace('_', '-')}"]
+            for o_str in comps.get("options", ()):
+                if len(o_str) == 1:
+                    o_str = f"-{o_str}"
+                elif not o_str.startswith("-"):
+                    o_str = f"--{o_str}"
+                if o_str not in args:
+                    args.append(o_str)
+        kwargs = {}
+        kwargs["action"] = action = comps.get("action", None)
+
+        if action is None:
+            # Non existing option defaults to a StoreAction in argparse
+            action = hub.config.ARGS["parser"]._registry_get("action", action)
+
+        if isinstance(action, str):
+            signature = inspect.signature(
+                hub.config.ARGS["parser"]._registry_get("action", action).__init__
+            )
+        else:
+            signature = inspect.signature(action.__init__)
+
+        for param in signature.parameters:
+            if param == "self" or param not in comps:
+                continue
+            if param == "dest":
+                kwargs["dest"] = comps.get("dest", arg)
+                continue
+            if param == "help":
+                kwargs["help"] = comps.get("help", "THIS NEEDS SOME DOCUMENTATION!!")
+                continue
+            if param == "default":
+                defaults[comps.get("dest", arg)] = comps[param]
+            kwargs[param] = comps[param]
+
+        if "group" in comps:
+            group = comps["group"]
+            if group not in groups:
+                groups[group] = hub.config.ARGS["parser"].add_argument_group(group)
+            groups[group].add_argument(*args, **kwargs)
+            continue
+        if "ex_group" in comps:
+            group = comps["ex_group"]
+            if group not in ex_groups:
+                ex_groups[group] = hub.config.ARGS[
+                    "parser"
+                ].add_mutually_exclusive_group()
+            ex_groups[group].add_argument(*args, **kwargs)
+            continue
+        if "subcommands" in comps:
+            subs = comps["subcommands"]
+            if not isinstance(subs, list):
+                subs = [subs]
+            for sub in subs:
+                if sub == "_global_":
+                    if "subs" not in hub.config.ARGS:
+                        continue
+                    hub.config.ARGS["parser"].add_argument(*args, **kwargs)
+                    for named, sparse in hub.config.ARGS["subs"].items():
+                        sparse.add_argument(*args, **kwargs)
+                    continue
+                sparse = hub.config.ARGS.get("subs", {}).get(sub)
+                if not sparse:
+                    # Maybe raise exception here? Malformed config?
+                    continue
+                sparse.add_argument(*args, **kwargs)
+            continue
+        hub.config.ARGS["parser"].add_argument(*args, **kwargs)
+    return defaults
+
+
+def parse(
+    hub,
+    args: List[str] = None,
+    namespace: argparse.Namespace = None,
+    only_parse_known_arguments: bool = False,
+) -> Dict[str, Any]:
+    """
+    Parse the command line options
+    """
+    if only_parse_known_arguments:
+        opts, unknown_args = hub.config.ARGS["parser"].parse_known_args(args, namespace)
+        opts_dict = opts.__dict__
+        opts_dict["_unknown_args_"] = unknown_args
+    else:
+        opts = hub.config.ARGS["parser"].parse_args(args, namespace)
+        opts_dict = opts.__dict__
+    hub.SUBPARSER = opts_dict.get("_subparser_", None)
+    return opts_dict
+
+
+def render(hub, cli_args: Dict[str, Any], raw_cli: Dict[str, Any]) -> Dict[str, Any]:
+    """
+    For options specified as such, take the string passed into the cli and
+    render it using the specified render flag
+    """
+    for key, val in raw_cli.items():
+        if key not in cli_args:
+            continue
+        if "render" not in val:
+            continue
+        if val["default"] != cli_args[key]:
+            # The value was changed, render it
+            cli_args[key] = hub.config.render.init.process(val["render"], cli_args[key])
+    return cli_args
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/contracts/__pycache__/order.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/contracts/__pycache__/order.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/contracts/order.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/contracts/order.py
new file mode 100644
index 0000000..33ce104
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/contracts/order.py
@@ -0,0 +1,89 @@
+import os
+import re
+
+
+class _DefaultOption:
+    pass
+
+
+def _insert_default_placeholders(raw):
+    defaults = {}
+    for imp in raw:
+        defaults[imp] = {}
+        for key, data in raw[imp]["CONFIG"].items():
+            if "default" not in data:
+                raise KeyError(f"No default value for '{key}' in '{imp}'s conf.py")
+            defaults[imp][key] = data["default"]
+            data["default"] = _DefaultOption
+    return defaults
+
+
+def _restore_raw_defaults(raw, defaults):
+    # undo our modification of the raw data structure
+    for imp in raw:
+        for key, data in raw[imp]["CONFIG"].items():
+            raw[imp]["CONFIG"][key]["default"] = defaults[imp][key]
+
+
+def _replace_default_placeholders(ret, defaults):
+    for imp in ret:
+        for key, data in ret[imp].items():
+            if data is _DefaultOption:
+                ret[imp][key] = defaults[imp][key]
+    return ret
+
+
+def _reroot_paths(defaults, root):
+    for imp in defaults:
+        for key, val in defaults[imp].items():
+            if key == "root_dir":
+                defaults[imp][key] = root
+            elif (key.endswith(("_dir", "_path", "_file"))) and os.path.isabs(
+                val or ""
+            ):
+                # only update absolute paths for keys
+                #  ending in _dir, _path or _file
+                defaults[imp][key] = _reroot_path(val, imp, root)
+
+
+def _get_root(ret, cli):
+    if "root_dir" not in ret.get(cli, {}):
+        # there is no root_dir parameter, do not activate roots system
+        #  otherwise there would be no way to *disable* the system
+        #  either by leaving out root_dir, or manually specifying root_dir=/
+        return None
+
+    # root_dir is not configured, maybe use home directory
+    if ret.get(cli, {})["root_dir"] is _DefaultOption:
+        if hasattr(os, "geteuid") and os.geteuid() != 0:
+            return os.path.expanduser(f"~{os.sep}.{cli}")
+        else:
+            return None
+
+    return ret.get(cli, {})["root_dir"]
+
+
+def _reroot_path(val, imp, new_root):
+    match = re.search(f"{os.sep + imp}($|{os.sep})", val)
+    if match:
+        if new_root.endswith(os.sep):
+            # val is guaranteed to start with '/' as it's an absolute path
+            #  remove one of the duplicate os separators
+            return new_root[:-1] + val
+        else:
+            return new_root + val
+    return val
+
+
+def pre_apply(hub, ctx):
+    kwargs = ctx.get_arguments()
+    ctx.cache["root_defaults"] = _insert_default_placeholders(kwargs["raw"])
+
+
+def post_apply(hub, ctx):
+    kwargs = ctx.get_arguments()
+    _restore_raw_defaults(kwargs["raw"], ctx.cache["root_defaults"])
+    root = _get_root(ctx.ret, kwargs["cli"])
+    if root:
+        _reroot_paths(ctx.cache["root_defaults"], root)
+    _replace_default_placeholders(ctx.ret, ctx.cache["root_defaults"])
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/dirs.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/dirs.py
new file mode 100644
index 0000000..1a28342
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/dirs.py
@@ -0,0 +1,101 @@
+"""
+Find the conf.py files specified in sources
+"""
+# Import python libs
+import importlib
+import copy
+import os
+import dict_tools
+
+
+def _load_pyimp(hub, imp):
+    """
+    Load up a python path, parse it and return the conf dataset
+    """
+    ret = {imp: {}}
+    cmod = importlib.import_module(f"{imp}.conf")
+    path = os.path.dirname(cmod.__file__)
+    for sec in hub.config.SECTIONS:
+        ret[imp][sec] = copy.deepcopy(getattr(cmod, sec, {}))
+    return path, ret
+
+
+def load(hub, sources, dyne_names, cli):
+    """
+    Look over the sources list and find the correct conf.py files
+    """
+    # Dynamic names
+    # First gather the defined sources, they are the authoritative ones
+    # Then detect what the dynamic names are in the source
+    # Merged the sources dyne names with any passed dyne names
+    # Load up and extend the raw with all of the dynamic names
+    raw = {}
+    dyne = hub.pop.dyne.get()
+    if not isinstance(sources, list):
+        sources = [sources]
+    for source in sources:
+        try:
+            path, data = _load_pyimp(hub, source)
+        except ImportError:
+            continue
+        dict_tools.update.update(raw, data)
+    dnames = set(dyne_names)
+    for source in raw:
+        for dname in raw[source]["DYNE"]:
+            dnames.add(dname)
+    for name in dnames:
+        if name in dyne:
+            if name not in raw:
+                raw[name] = {"CONFIG": {}, "CLI_CONFIG": {}}
+            if "CONFIG" in dyne[name]:
+                config_draw = {}
+                for key, val in dyne[name]["CONFIG"].items():
+                    new_dyne = val.get("dyne")
+                    if new_dyne == "__cli__":
+                        new_dyne = cli
+                    if new_dyne:
+                        val["source"] = new_dyne
+                        config_draw[key] = val
+                        if (
+                            key in dyne[name]["CLI_CONFIG"]
+                            and "dyne" not in dyne[name]["CLI_CONFIG"][key]
+                        ):
+                            dyne[name]["CLI_CONFIG"][key]["dyne"] = new_dyne
+                dict_tools.update.update(raw[cli]["CONFIG"], config_draw)
+            if "CLI_CONFIG" in dyne[name]:
+                cli_draw = {}
+                for key, val in dyne[name]["CLI_CONFIG"].items():
+                    new_dyne = val.get("dyne")
+                    if new_dyne == "__cli__":
+                        new_dyne = cli
+                    if new_dyne:
+                        val["source"] = new_dyne
+                        cli_draw[key] = val
+                dict_tools.update.update(raw[cli]["CLI_CONFIG"], cli_draw)
+            if "SUBCOMMANDS" in dyne[name]:
+                subcmd_draw = {}
+                for key, val in dyne[name]["SUBCOMMANDS"].items():
+                    new_dyne = val.get("dyne")
+                    if new_dyne == "__cli__":
+                        new_dyne = cli
+                    if new_dyne:
+                        val["source"] = new_dyne
+                        subcmd_draw[key] = val
+                dict_tools.update.update(raw[cli]["SUBCOMMANDS"], subcmd_draw)
+    return raw
+
+
+def verify(hub, opts):
+    """
+    Verify that the environment and all named directories in the
+    configuration exist
+    """
+    for imp in opts:
+        for key in opts[imp]:
+            if key == "root_dir":
+                continue
+            if key == "config_dir":
+                continue
+            if key.endswith("_dir"):
+                if not os.path.isdir(opts[imp][key]):
+                    os.makedirs(opts[imp][key])
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/file/__pycache__/init.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/file/__pycache__/init.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/file/init.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/file/init.py
new file mode 100644
index 0000000..dcab8cc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/file/init.py
@@ -0,0 +1,122 @@
+# -*- coding: utf-8 -*-
+"""
+Configuration file core loading functions
+"""
+
+# Import python libs
+import os
+import glob
+import fnmatch
+import dict_tools.update
+
+
+def parse(hub, raw, cli, os_vars, cli_args, loader):
+    """
+    Determine if a config file or a config dir has been set up and load it up!
+    """
+    # This function is the entry point for the config.file sub
+    # Figure out what config file value to use in this priority
+    default = raw[cli]["CONFIG"].get("config", {}).get("default")
+    default_dir = raw[cli]["CONFIG"].get("config_dir", {}).get("default")
+    os_conf = os_vars.get("config", default)
+    os_dir = os_vars.get("config_dir", default_dir)
+    conf = cli_args.get("config", os_conf)
+    dir_ = cli_args.get("config_dir", os_dir)
+    file_opts = {}
+    dir_opts = {}
+    if dir_:
+        file_opts = hub.config.file.init.load_dir(dir_, loader)
+    if conf:
+        dir_opts = hub.config.file.init.load(conf, loader)
+    ret = dict_tools.update.update(dir_opts, file_opts)
+    return ret
+
+
+def load(hub, paths, loader, includes=True):
+    """
+    Load a single configuration file
+    """
+    opts = {}
+    if not isinstance(paths, list):
+        paths = [paths]
+    add = []
+    for fn in paths:
+        add.extend(glob.glob(fn))
+    paths.extend(add)
+    for fn in paths:
+        fn_data = hub.config.render.init.load_file(loader, fn)
+        if includes:
+            fn_data = hub.config.file.init.proc_include(fn, fn_data, loader)
+        dict_tools.update.update(opts, fn_data)
+    return opts
+
+
+def load_dir(
+    hub,
+    confdir,
+    loader,
+    includes=True,
+    recurse=True,
+):
+    """
+    Load takes a directory location to scan for configuration files. These
+    files will be read in.
+    """
+    opts = {}
+    if not isinstance(confdir, list):
+        confdir = [confdir]
+    confdirs = []
+    for dirs in confdir:
+        if not isinstance(dirs, (list, tuple)):
+            dirs = [dirs]
+        for dir_ in dirs:
+            confdirs.extend(glob.glob(dir_))
+    paths = []
+    for dir_ in confdirs:
+        dirpaths = []
+        if os.path.isdir(dir_):
+            if not recurse:
+                for fn_ in os.listdir(dir_):
+                    path = os.path.join(dir_, fn_)
+                    if os.path.isdir(path):
+                        # Don't process directories
+                        continue
+                    dirpaths.append(path)
+            else:
+                for root, dirs, files in os.walk(dir_):
+                    for fn_ in files:
+                        path = os.path.join(root, fn_)
+                        dirpaths.append(path)
+
+        # Sort confdir directory paths like:
+        # /b.txt
+        # /c.txt
+        # /a/x.txt
+        # /b/x.txt
+        paths.extend(sorted(dirpaths, key=lambda p: (p.count(os.path.sep), p)))
+    opts = dict_tools.update.update(
+        opts, hub.config.file.init.load(paths, loader, includes)
+    )
+    return opts
+
+
+def proc_include(hub, fn, opts, loader):
+    """
+    Process include and include_dir
+    """
+    dirname = os.path.dirname(fn)
+    if opts.get("include_dir"):
+        idir = opts.pop("include_dir")
+        if not idir.startswith(os.path.abspath(os.sep)):
+            idir = os.path.join(dirname, idir)
+        opts = dict_tools.update.update(
+            opts, hub.config.file.init.load_dir(idir, loader)
+        )
+        hub.config.file.init.proc_include(os.path.join(idir, "f"), opts, loader)
+    if opts.get("include"):
+        ifn = opts.pop("include")
+        if not ifn.startswith(os.path.abspath(os.sep)):
+            ifn = os.path.join(dirname, ifn)
+        opts = dict_tools.update.update(opts, hub.config.file.init.load(ifn, loader))
+        hub.config.file.init.proc_include(ifn, opts, loader)
+    return opts
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/init.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/init.py
new file mode 100644
index 0000000..ec11166
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/init.py
@@ -0,0 +1,9 @@
+def __init__(hub):
+    """
+    Load the subdirs for conf
+    """
+    hub.pop.sub.add(dyne_name="log")
+    hub.pop.sub.load_subdirs(hub.config, recurse=True)
+    hub.config.ARGS = {}
+    hub.config.SECTIONS = ("CONFIG", "CLI_CONFIG", "SUBCOMMANDS", "DYNE")
+    hub.config.CONFIG_SECTIONS = ("CONFIG", "CLI_CONFIG")
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/integrate.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/integrate.py
new file mode 100644
index 0000000..003101c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/integrate.py
@@ -0,0 +1,32 @@
+from typing import List
+
+
+def load(
+    hub,
+    sources: List[str],
+    cli: str = None,
+    dyne_names: List[str] = None,
+    loader: str = "yaml",
+    parse_cli: bool = True,
+    logs: bool = True,
+):
+    """
+    Load up the configs from the integrate system
+    """
+    if not isinstance(sources, list):
+        sources = [sources]
+    sources.append("pop_config")
+    if dyne_names is None:
+        dyne_names = []
+    raw = hub.config.dirs.load(sources, dyne_names, cli)
+    os_vars = hub.config.os.init.gather(raw)
+    cli_args, raw_cli = hub.config.args.gather(raw, cli, parse_cli)
+    if cli_args.get("version"):
+        hub.config.version.run(cli)
+    configs = hub.config.file.init.parse(raw, cli, os_vars, cli_args, loader)
+    opt = hub.config.order.apply(raw, raw_cli, cli, cli_args, os_vars, configs)
+    hub.OPT = hub.pop.data.imap(opt)
+
+    if logs:
+        log_plugin = hub.OPT[sources[0]].get("log_plugin")
+        getattr(hub, f"log.{log_plugin}.setup")(hub.OPT[sources[0]])
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/order.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/order.py
new file mode 100644
index 0000000..a218e77
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/order.py
@@ -0,0 +1,31 @@
+def apply(hub, raw, raw_cli, cli, cli_args, os_vars, configs):
+    # Defaults (raw)
+    # Config files (configs)
+    # OS (os_vars)
+    # CLI (cli_args)
+    ret = {}
+    for imp in raw:
+        ret[imp] = {}
+        for key, data in raw[imp]["CONFIG"].items():
+            if "default" in data:
+                ret[imp][key] = data["default"]
+    # TODO: This assumes that we are using the namespace approach,
+    # This makes the config structure the easiest, meaning that components are
+    # namespaced by the user.
+    # Some other additional pattern could be added and this chunk could
+    # be made pluggable.
+    for imp in configs:
+        if imp not in ret:
+            ret[imp] = {}
+        for key in configs[imp]:
+            ret[imp][key] = configs[imp][key]
+    for imp in os_vars:
+        for key in os_vars[imp]:
+            ret[imp][key] = os_vars[imp][key]
+    for key in cli_args:
+        if key in raw_cli:
+            if "source" in raw_cli[key]:
+                ret[raw_cli[key]["source"]][key] = cli_args[key]
+            else:
+                ret[cli][key] = cli_args[key]
+    return ret
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/os/__pycache__/init.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/os/__pycache__/init.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/os/init.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/os/init.py
new file mode 100644
index 0000000..d29d496
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/os/init.py
@@ -0,0 +1,28 @@
+"""
+The os sub is used to gather configuration options from the OS facility
+to send configuration options into applications.
+"""
+# Import python libs
+import os
+
+
+def gather(hub, raw):
+    """
+    Collect the keys that need to be found and pass them to the
+    os specific loaded plugin
+    """
+    ret = {}
+    for imp in raw:
+        for sec in hub.config.CONFIG_SECTIONS:
+            if sec not in raw[imp]:
+                continue
+            for key in raw[imp][sec]:
+                osvar = raw[imp][sec][key].get("os", None)
+                if osvar is not None:
+                    val = hub.config.os.system.collect(osvar)
+                    if val is not None:
+                        src = raw[imp][sec][key].get("source", imp)
+                        if src not in ret:
+                            ret[src] = {}
+                        ret[src][key] = val
+    return ret
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/os/nix_os.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/os/nix_os.py
new file mode 100644
index 0000000..fbe696d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/os/nix_os.py
@@ -0,0 +1,26 @@
+"""
+Read in keys from *NIX like oses - AKA Environement variables
+"""
+# Import python libs
+import os
+
+__virtualname__ = "system"
+
+
+def __virtual__(hub):
+    """
+    Don't load on Windows, this is for *nix style platforms
+    """
+    # TODO: detect if not windows
+    return True
+
+
+def collect(hub, key):
+    """
+    Collect the option from environment variable if present
+    """
+    ret = {}
+    key = key.upper()
+    if key in os.environ:
+        return os.environ[key]
+    return None
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/__pycache__/yaml_conf.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/__pycache__/yaml_conf.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/cli.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/cli.py
new file mode 100644
index 0000000..af85a9b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/cli.py
@@ -0,0 +1,46 @@
+# -*- coding: utf-8 -*-
+from typing import Any, Dict, List
+
+try:
+    import yaml
+
+    HAS_YAML = True
+except ImportError:
+    HAS_YAML = False
+
+__virtualname__ = "cli"
+
+
+def __virtual__(hub):
+    if HAS_YAML:
+        return True
+    return (False, "PyYaml could not be loaded")
+
+
+def load(hub, path):
+    try:
+        with open(path, "rb") as fp_:
+            ret = {}
+            for line in fp_:
+                ret.update(hub.config.render.cli.render(line))
+            return ret
+    except FileNotFoundError:
+        pass
+    return {}
+
+
+def render(hub, val: List[str] or str) -> List[str]:
+    """
+    Take the string and render it in json
+    """
+    ret = []
+    if isinstance(val, str):
+        val = [val]
+    for v in val:
+        if "=" in v:
+            key, v = v.split("=", maxsplit=1)
+            ret.append({key: yaml.safe_load(v)})
+        else:
+            ret.append(yaml.safe_load(v))
+
+    return ret
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/init.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/init.py
new file mode 100644
index 0000000..3c83f9d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/init.py
@@ -0,0 +1,42 @@
+# The render process for the cli does NOT use the rend project for a couple
+# of reasons
+# 1. Config needs to be very early in the startup, therefore it cannot use
+#    asyncio, all rend funcs use asyncio
+# 2. Config will not allow for template wrapping as the render is just a
+#    single command line render
+
+
+def process(hub, renderer, value):
+    """
+    Take a renderer and a value, process it, and return the processed value
+
+    This is intended to load a string through the config render system
+    """
+    return getattr(hub, f"config.render.{renderer}.render")(value)
+
+
+def pipe(hub, dpipe, data):
+    """
+    Given a render pipe, render the given data
+    """
+    for render in dpipe:
+        if isinstance(render, bytes):
+            render = render.decode()
+        data = hub.config.render.init.process(render, data)
+    return data
+
+
+def load_file(hub, renderer, fn):
+    """
+    Load up a file with the passed renderer unless the file contains a
+    renderer she-bang line
+    """
+    with open(fn, "rb") as rfh:
+        data = rfh.read()
+    if not data:
+        return {}
+    if data.startswith(b"#!"):
+        dpipe = data[2 : data.index(b"\n")].split(b"|")
+        return hub.config.render.init.pipe(dpipe, data)
+    else:
+        return hub.config.render.init.process(renderer, data)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/json_conf.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/json_conf.py
new file mode 100644
index 0000000..d9f5861
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/json_conf.py
@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+"""
+Define the JSON loader interface
+"""
+
+# Import python libs
+import json
+
+__virtualname__ = "json"
+
+
+def __virtual__(hub):
+    return True
+
+
+def load(hub, path):
+    """
+    Use json to read in a file
+    """
+    try:
+        with open(path, "r") as fp_:
+            ret = json.loads(fp_.read())
+        return ret
+    except FileNotFoundError:
+        return {}
+
+
+def render(hub, val):
+    """
+    Take the string and render it in json
+    """
+    return json.loads(val)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/toml_conf.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/toml_conf.py
new file mode 100644
index 0000000..c395c48
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/toml_conf.py
@@ -0,0 +1,40 @@
+# -*- coding: utf-8 -*-
+"""
+Define the yaml loader interface
+"""
+
+# Import third party libs
+try:
+    import toml
+
+    HAS_TOML = True
+except ImportError:
+    HAS_TOML = False
+
+__virtualname__ = "toml"
+# __contracts__ = [__virtualname__]
+
+
+def __virtual__(hub):
+    if HAS_TOML:
+        return True
+    return (False, "TOML could not be loaded")
+
+
+def load(hub, path):
+    """
+    use toml to read in a file
+    """
+    try:
+        with open(path, "rb") as fp_:
+            return toml.load(fp_.read())
+    except FileNotFoundError:
+        pass
+    return {}
+
+
+def render(hub, val):
+    """
+    Take the string and render it in json
+    """
+    return toml.loads(val)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/yaml_conf.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/yaml_conf.py
new file mode 100644
index 0000000..031ac22
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/render/yaml_conf.py
@@ -0,0 +1,39 @@
+# -*- coding: utf-8 -*-
+"""
+Define the yaml loader interface
+"""
+
+# Import third party libs
+try:
+    import yaml
+
+    HAS_YAML = True
+except ImportError:
+    HAS_YAML = False
+
+__virtualname__ = "yaml"
+
+
+def __virtual__(hub):
+    if HAS_YAML:
+        return True
+    return (False, "PyYaml could not be loaded")
+
+
+def load(hub, path):
+    """
+    use yaml to read in a file
+    """
+    try:
+        with open(path, "rb") as fp_:
+            return yaml.safe_load(fp_.read())
+    except FileNotFoundError:
+        pass
+    return {}
+
+
+def render(hub, val):
+    """
+    Take the string and render it in json
+    """
+    return yaml.safe_load(val)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/config/version.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/version.py
new file mode 100644
index 0000000..ae07473
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/config/version.py
@@ -0,0 +1,24 @@
+"""
+Support embedding version number lookup into cli
+"""
+# Import python libs
+import importlib
+import sys
+
+
+CONFIG = {
+    "version": {
+        "default": False,
+        "action": "store_true",
+        "help": "Display version information",
+    }
+}
+
+
+def run(hub, primary):
+    """
+    Check the version number and then exit
+    """
+    mod = importlib.import_module(f"{primary}.version")
+    print(f"{primary} {mod.version}")
+    sys.exit(0)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/log/__pycache__/async.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/pop_config/log/__pycache__/async.cpython-38.pyc
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diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/log/async.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/log/async.py
new file mode 100644
index 0000000..c7a3dc4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/log/async.py
@@ -0,0 +1,148 @@
+import asyncio
+import inspect
+import aiologger
+import aiologger.handlers.streams
+import aiologger.handlers.files
+import aiologger.handlers.base
+import aiologger.levels
+import aiologger.formatters.base
+import aiologger.records
+import logging
+import pop.contract
+import sys
+
+
+def __init__(hub):
+    hub.log.LOGGER = {}
+    hub.log.FILE_HANDLER = None
+    hub.log.STREAM_HANDLER = None
+
+
+def _stack_frames(relative_start: int) -> inspect.FrameInfo:
+    """
+    Efficiently access stack frames.
+    :param relative_start: Starting stack depth; The default, 2 is the parent of the
+                           caller of stack_frames - the first function that may be unknown.
+    :return: a stack frame
+    """
+    if hasattr(sys, "_getframe"):
+        # implementation detail of CPython, speeds things up by 100x.
+        frame = sys._getframe(relative_start)
+        while frame:
+            yield frame
+            frame = frame.f_back
+    else:
+        for frame_info in inspect.stack(context=0)[relative_start:]:
+            yield frame_info.frame
+
+
+def _get_hub_ref() -> str:
+    # Minimize lookup time by starting at frame 5, it will be at least that far back
+    for frame in _stack_frames(5):
+        if isinstance(frame.f_locals.get("self"), pop.contract.Contracted):
+            contracted = frame.f_locals["self"]
+            break
+    else:
+        # Default to the root reference
+        return "hub"
+
+    return contracted, frame.f_lineno
+
+
+def _get_logger(hub, name: str = "") -> aiologger.Logger:
+    if name not in hub.log.LOGGER:
+        hub.log.LOGGER[name]: aiologger.Logger = aiologger.Logger(
+            name=name, loop=hub.pop.Loop
+        )
+        hub.log.LOGGER[name].level = hub.log.INT_LEVEL
+        if hub.log.FILE_HANDLER:
+            hub.log.LOGGER[name].handlers.append(hub.log.FILE_HANDLER)
+        if hub.log.STREAM_HANDLER:
+            hub.log.LOGGER[name].handlers.append(hub.log.STREAM_HANDLER)
+    return hub.log.LOGGER[name]
+
+
+def log(hub, level: int, msg: str, *args, **kwargs):
+    if hub.log.INT_LEVEL <= level:
+        contract, lineno = _get_hub_ref()
+        caller = f"{contract.ref}.{contract.func.__name__}"
+        logger: aiologger.Logger = _get_logger(hub, caller)
+        record = aiologger.records.LogRecord(
+            name=caller,
+            pathname=contract.func.__module__,
+            lineno=lineno,
+            level=0,  # We have to overwrite this in a secure way
+            msg=msg,
+            args=args,
+            func=contract.func.__name__,
+            **kwargs,
+        )
+        record.levelno = level
+        if level == 5:
+            record.levelname = "TRACE"
+        else:
+            try:
+                record.levelname = aiologger.records.get_level_name(level)
+            except ValueError:
+                record.levelname = f"LEVEL {level}"
+
+        ret = logger.handle(record)
+        if asyncio.iscoroutine(ret):
+            hub.pop.Loop.create_task(ret)
+
+
+def setup(hub, conf):
+    """
+    Given the configuration data set up the logger
+    """
+    # Make sure the loop exists
+    hub.pop.loop.create()
+    # Use the saved root logger
+    root = _get_logger(hub, name="")
+
+    raw_level = conf["log_level"].strip().lower()
+    if raw_level.isdigit():
+        hub.log.INT_LEVEL = int(raw_level)
+    else:
+        hub.log.INT_LEVEL = hub.log.LEVEL.get(raw_level, root.level)
+
+    root.level = hub.log.INT_LEVEL
+    cf = aiologger.formatters.base.Formatter(
+        fmt=conf["log_fmt_console"], datefmt=conf["log_datefmt"]
+    )
+    ch = aiologger.handlers.streams.AsyncStreamHandler(
+        formatter=cf, loop=hub.pop.Loop, stream=sys.stderr
+    )
+    ch._level = hub.log.INT_LEVEL
+    root.add_handler(ch)
+    hub.log.STREAM_HANDLER = ch
+
+    ff = aiologger.formatters.base.Formatter(
+        fmt=conf["log_fmt_console"], datefmt=conf["log_datefmt"]
+    )
+    fh = aiologger.handlers.files.AsyncFileHandler(conf["log_file"], loop=hub.pop.Loop)
+    fh._level = hub.log.INT_LEVEL
+    fh.formatter = ff
+    root.add_handler(fh)
+    hub.log.FILE_HANDLER = fh
+
+    # Put all these functions higher up on the hub
+    hub.log.log = getattr(hub.log, "async").log
+    hub.log.trace = lambda msg, *args, **kwargs: hub.log.log(
+        level=5, msg=msg, *args, **kwargs
+    )
+    hub.log.debug = lambda msg, *args, **kwargs: hub.log.log(
+        level=aiologger.levels.LogLevel.DEBUG, msg=msg, *args, **kwargs
+    )
+    hub.log.info = lambda msg, *args, **kwargs: hub.log.log(
+        level=aiologger.levels.LogLevel.INFO, msg=msg, *args, **kwargs
+    )
+    hub.log.warning = lambda msg, *args, **kwargs: hub.log.log(
+        level=aiologger.levels.LogLevel.WARNING, msg=msg, *args, **kwargs
+    )
+    hub.log.error = lambda msg, *args, **kwargs: hub.log.log(
+        level=aiologger.levels.LogLevel.ERROR, msg=msg, *args, **kwargs
+    )
+    hub.log.critical = lambda msg, *args, **kwargs: hub.log.log(
+        level=aiologger.levels.LogLevel.CRITICAL, msg=msg, *args, **kwargs
+    )
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/log/basic.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/log/basic.py
new file mode 100644
index 0000000..5e09565
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/log/basic.py
@@ -0,0 +1,27 @@
+import logging
+
+
+def setup(hub, conf):
+    """
+    Given the configuration data set up the logger
+    """
+    # Use the saved root logger
+    root = logging.getLogger()
+
+    raw_level = conf["log_level"].strip().lower()
+    if raw_level.isdigit():
+        hub.log.INT_LEVEL = int(raw_level)
+    else:
+        hub.log.INT_LEVEL = hub.log.LEVEL.get(raw_level, root.level)
+
+    root.setLevel(hub.log.INT_LEVEL)
+    cf = logging.Formatter(fmt=conf["log_fmt_console"], datefmt=conf["log_datefmt"])
+    ch = logging.StreamHandler()
+    ch.setLevel(hub.log.INT_LEVEL)
+    ch.setFormatter(cf)
+    root.addHandler(ch)
+
+    ff = logging.Formatter(fmt=conf["log_fmt_console"], datefmt=conf["log_datefmt"])
+    fh = logging.FileHandler(conf["log_file"])
+    fh.setFormatter(ff)
+    root.addHandler(fh)
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/log/init.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/log/init.py
new file mode 100644
index 0000000..bd3cbb4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/log/init.py
@@ -0,0 +1,35 @@
+"""
+This sub is used to set up logging for pop projects and injects logging
+options into conf making it easy to add robust logging
+"""
+# Import python libs
+import logging
+
+
+def __init__(hub):
+    """
+    Set up variables used by the log subsystem
+    """
+    logging.addLevelName(5, "TRACE")
+    hub.log.LEVEL = {
+        "notset": logging.NOTSET,
+        "trace": 5,
+        "debug": logging.DEBUG,
+        "info": logging.INFO,
+        "warn": logging.WARN,
+        "warning": logging.WARNING,
+        "error": logging.ERROR,
+        "fatal": logging.FATAL,
+        "critical": logging.CRITICAL,
+    }
+    log = logging.getLogger(__name__)
+
+    # These should be overwritten by the integrated logger, but here's a contingency
+    hub.log.INT_LEVEL = log.getEffectiveLevel()
+    hub.log.log = log.log
+    hub.log.trace = lambda msg, *args, **kwargs: log.log(5, msg, *args, **kwargs)
+    hub.log.debug = log.debug
+    hub.log.info = log.info
+    hub.log.critical = log.critical
+    hub.log.warning = log.warning
+    hub.log.error = log.error
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/scripts.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/scripts.py
new file mode 100644
index 0000000..6581e3d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/scripts.py
@@ -0,0 +1,10 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import pop.hub
+
+
+def start():
+    hub = pop.hub.Hub()
+    hub.pop.sub.add(dyne_name="conf")
+    hub.conf.init.cli()
diff --git a/python3-vckonline/lib/python3.8/site-packages/pop_config/version.py b/python3-vckonline/lib/python3.8/site-packages/pop_config/version.py
new file mode 100644
index 0000000..4eeaf9a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/pop_config/version.py
@@ -0,0 +1,2 @@
+# -*- coding: utf-8 -*-
+version = "6.11"
diff --git a/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0-py3.8-nspkg.pth b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0-py3.8-nspkg.pth
new file mode 100644
index 0000000..baef7a0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0-py3.8-nspkg.pth
@@ -0,0 +1 @@
+import sys, types, os;has_mfs = sys.version_info > (3, 5);p = os.path.join(sys._getframe(1).f_locals['sitedir'], *('google',));importlib = has_mfs and __import__('importlib.util');has_mfs and __import__('importlib.machinery');m = has_mfs and sys.modules.setdefault('google', importlib.util.module_from_spec(importlib.machinery.PathFinder.find_spec('google', [os.path.dirname(p)])));m = m or sys.modules.setdefault('google', types.ModuleType('google'));mp = (m or []) and m.__dict__.setdefault('__path__',[]);(p not in mp) and mp.append(p)
diff --git a/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/METADATA
new file mode 100644
index 0000000..920ffb8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/METADATA
@@ -0,0 +1,25 @@
+Metadata-Version: 2.1
+Name: protobuf
+Version: 3.13.0
+Summary: Protocol Buffers
+Home-page: https://developers.google.com/protocol-buffers/
+Maintainer: protobuf@googlegroups.com
+Maintainer-email: protobuf@googlegroups.com
+License: 3-Clause BSD License
+Download-URL: https://github.com/protocolbuffers/protobuf/releases
+Platform: UNKNOWN
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.3
+Classifier: Programming Language :: Python :: 3.4
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Requires-Dist: six (>=1.9)
+Requires-Dist: setuptools
+
+Protocol Buffers are Google's data interchange format
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/RECORD
new file mode 100644
index 0000000..7532c0b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/RECORD
@@ -0,0 +1,203 @@
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new file mode 100644
index 0000000..0796649
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/WHEEL
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+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: false
+Tag: cp38-cp38-manylinux1_x86_64
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/namespace_packages.txt b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/namespace_packages.txt
new file mode 100644
index 0000000..cb42911
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/namespace_packages.txt
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+google
diff --git a/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/top_level.txt
new file mode 100644
index 0000000..cb42911
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/protobuf-3.13.0.dist-info/top_level.txt
@@ -0,0 +1 @@
+google
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/INSTALLER
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--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/LICENSE b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/LICENSE
new file mode 100644
index 0000000..6e0693b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/LICENSE
@@ -0,0 +1,19 @@
+Copyright (C) 2016 Jason R Coombs <jaraco@jaraco.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/METADATA
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index 0000000..80c95c3
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/METADATA
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+Metadata-Version: 2.1
+Name: setuptools
+Version: 41.6.0
+Summary: Easily download, build, install, upgrade, and uninstall Python packages
+Home-page: https://github.com/pypa/setuptools
+Author: Python Packaging Authority
+Author-email: distutils-sig@python.org
+License: UNKNOWN
+Project-URL: Documentation, https://setuptools.readthedocs.io/
+Keywords: CPAN PyPI distutils eggs package management
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.4
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Classifier: Topic :: System :: Archiving :: Packaging
+Classifier: Topic :: System :: Systems Administration
+Classifier: Topic :: Utilities
+Requires-Python: !=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7
+Description-Content-Type: text/x-rst; charset=UTF-8
+Provides-Extra: certs
+Requires-Dist: certifi (==2016.9.26) ; extra == 'certs'
+Provides-Extra: ssl
+Requires-Dist: wincertstore (==0.2) ; (sys_platform == "win32") and extra == 'ssl'
+
+.. image:: https://img.shields.io/pypi/v/setuptools.svg
+   :target: https://pypi.org/project/setuptools
+
+.. image:: https://img.shields.io/readthedocs/setuptools/latest.svg
+    :target: https://setuptools.readthedocs.io
+
+.. image:: https://img.shields.io/travis/pypa/setuptools/master.svg?label=Linux%20CI&logo=travis&logoColor=white
+   :target: https://travis-ci.org/pypa/setuptools
+
+.. image:: https://img.shields.io/appveyor/ci/pypa/setuptools/master.svg?label=Windows%20CI&logo=appveyor&logoColor=white
+   :target: https://ci.appveyor.com/project/pypa/setuptools/branch/master
+
+.. image:: https://img.shields.io/codecov/c/github/pypa/setuptools/master.svg?logo=codecov&logoColor=white
+   :target: https://codecov.io/gh/pypa/setuptools
+
+.. image:: https://tidelift.com/badges/github/pypa/setuptools?style=flat
+   :target: https://tidelift.com/subscription/pkg/pypi-setuptools?utm_source=pypi-setuptools&utm_medium=readme
+
+.. image:: https://img.shields.io/pypi/pyversions/setuptools.svg
+
+See the `Installation Instructions
+<https://packaging.python.org/installing/>`_ in the Python Packaging
+User's Guide for instructions on installing, upgrading, and uninstalling
+Setuptools.
+
+Questions and comments should be directed to the `distutils-sig
+mailing list <http://mail.python.org/pipermail/distutils-sig/>`_.
+Bug reports and especially tested patches may be
+submitted directly to the `bug tracker
+<https://github.com/pypa/setuptools/issues>`_.
+
+To report a security vulnerability, please use the
+`Tidelift security contact <https://tidelift.com/security>`_.
+Tidelift will coordinate the fix and disclosure.
+
+
+Code of Conduct
+---------------
+
+Everyone interacting in the setuptools project's codebases, issue trackers,
+chat rooms, and mailing lists is expected to follow the
+`PyPA Code of Conduct <https://www.pypa.io/en/latest/code-of-conduct/>`_.
+
+
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diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/WHEEL
new file mode 100644
index 0000000..8b701e9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.33.6)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/dependency_links.txt b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/dependency_links.txt
new file mode 100644
index 0000000..e87d021
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/dependency_links.txt
@@ -0,0 +1,2 @@
+https://files.pythonhosted.org/packages/source/c/certifi/certifi-2016.9.26.tar.gz#md5=baa81e951a29958563689d868ef1064d
+https://files.pythonhosted.org/packages/source/w/wincertstore/wincertstore-0.2.zip#md5=ae728f2f007185648d0c7a8679b361e2
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/entry_points.txt b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/entry_points.txt
new file mode 100644
index 0000000..975c2f0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/entry_points.txt
@@ -0,0 +1,65 @@
+[console_scripts]
+easy_install = setuptools.command.easy_install:main
+easy_install-3.8 = setuptools.command.easy_install:main
+
+[distutils.commands]
+alias = setuptools.command.alias:alias
+bdist_egg = setuptools.command.bdist_egg:bdist_egg
+bdist_rpm = setuptools.command.bdist_rpm:bdist_rpm
+bdist_wininst = setuptools.command.bdist_wininst:bdist_wininst
+build_clib = setuptools.command.build_clib:build_clib
+build_ext = setuptools.command.build_ext:build_ext
+build_py = setuptools.command.build_py:build_py
+develop = setuptools.command.develop:develop
+dist_info = setuptools.command.dist_info:dist_info
+easy_install = setuptools.command.easy_install:easy_install
+egg_info = setuptools.command.egg_info:egg_info
+install = setuptools.command.install:install
+install_egg_info = setuptools.command.install_egg_info:install_egg_info
+install_lib = setuptools.command.install_lib:install_lib
+install_scripts = setuptools.command.install_scripts:install_scripts
+register = setuptools.command.register:register
+rotate = setuptools.command.rotate:rotate
+saveopts = setuptools.command.saveopts:saveopts
+sdist = setuptools.command.sdist:sdist
+setopt = setuptools.command.setopt:setopt
+test = setuptools.command.test:test
+upload = setuptools.command.upload:upload
+upload_docs = setuptools.command.upload_docs:upload_docs
+
+[distutils.setup_keywords]
+convert_2to3_doctests = setuptools.dist:assert_string_list
+dependency_links = setuptools.dist:assert_string_list
+eager_resources = setuptools.dist:assert_string_list
+entry_points = setuptools.dist:check_entry_points
+exclude_package_data = setuptools.dist:check_package_data
+extras_require = setuptools.dist:check_extras
+include_package_data = setuptools.dist:assert_bool
+install_requires = setuptools.dist:check_requirements
+namespace_packages = setuptools.dist:check_nsp
+package_data = setuptools.dist:check_package_data
+packages = setuptools.dist:check_packages
+python_requires = setuptools.dist:check_specifier
+setup_requires = setuptools.dist:check_requirements
+test_loader = setuptools.dist:check_importable
+test_runner = setuptools.dist:check_importable
+test_suite = setuptools.dist:check_test_suite
+tests_require = setuptools.dist:check_requirements
+use_2to3 = setuptools.dist:assert_bool
+use_2to3_exclude_fixers = setuptools.dist:assert_string_list
+use_2to3_fixers = setuptools.dist:assert_string_list
+zip_safe = setuptools.dist:assert_bool
+
+[egg_info.writers]
+PKG-INFO = setuptools.command.egg_info:write_pkg_info
+dependency_links.txt = setuptools.command.egg_info:overwrite_arg
+depends.txt = setuptools.command.egg_info:warn_depends_obsolete
+eager_resources.txt = setuptools.command.egg_info:overwrite_arg
+entry_points.txt = setuptools.command.egg_info:write_entries
+namespace_packages.txt = setuptools.command.egg_info:overwrite_arg
+requires.txt = setuptools.command.egg_info:write_requirements
+top_level.txt = setuptools.command.egg_info:write_toplevel_names
+
+[setuptools.installation]
+eggsecutable = setuptools.command.easy_install:bootstrap
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/top_level.txt
new file mode 100644
index 0000000..4577c6a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/top_level.txt
@@ -0,0 +1,3 @@
+easy_install
+pkg_resources
+setuptools
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/zip-safe b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/zip-safe
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools-41.6.0.dist-info/zip-safe
@@ -0,0 +1 @@
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/__init__.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/__init__.py
new file mode 100644
index 0000000..a71b2bb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/__init__.py
@@ -0,0 +1,228 @@
+"""Extensions to the 'distutils' for large or complex distributions"""
+
+import os
+import sys
+import functools
+import distutils.core
+import distutils.filelist
+import re
+from distutils.errors import DistutilsOptionError
+from distutils.util import convert_path
+from fnmatch import fnmatchcase
+
+from ._deprecation_warning import SetuptoolsDeprecationWarning
+
+from setuptools.extern.six import PY3, string_types
+from setuptools.extern.six.moves import filter, map
+
+import setuptools.version
+from setuptools.extension import Extension
+from setuptools.dist import Distribution, Feature
+from setuptools.depends import Require
+from . import monkey
+
+__metaclass__ = type
+
+
+__all__ = [
+    'setup', 'Distribution', 'Feature', 'Command', 'Extension', 'Require',
+    'SetuptoolsDeprecationWarning',
+    'find_packages'
+]
+
+if PY3:
+  __all__.append('find_namespace_packages')
+
+__version__ = setuptools.version.__version__
+
+bootstrap_install_from = None
+
+# If we run 2to3 on .py files, should we also convert docstrings?
+# Default: yes; assume that we can detect doctests reliably
+run_2to3_on_doctests = True
+# Standard package names for fixer packages
+lib2to3_fixer_packages = ['lib2to3.fixes']
+
+
+class PackageFinder:
+    """
+    Generate a list of all Python packages found within a directory
+    """
+
+    @classmethod
+    def find(cls, where='.', exclude=(), include=('*',)):
+        """Return a list all Python packages found within directory 'where'
+
+        'where' is the root directory which will be searched for packages.  It
+        should be supplied as a "cross-platform" (i.e. URL-style) path; it will
+        be converted to the appropriate local path syntax.
+
+        'exclude' is a sequence of package names to exclude; '*' can be used
+        as a wildcard in the names, such that 'foo.*' will exclude all
+        subpackages of 'foo' (but not 'foo' itself).
+
+        'include' is a sequence of package names to include.  If it's
+        specified, only the named packages will be included.  If it's not
+        specified, all found packages will be included.  'include' can contain
+        shell style wildcard patterns just like 'exclude'.
+        """
+
+        return list(cls._find_packages_iter(
+            convert_path(where),
+            cls._build_filter('ez_setup', '*__pycache__', *exclude),
+            cls._build_filter(*include)))
+
+    @classmethod
+    def _find_packages_iter(cls, where, exclude, include):
+        """
+        All the packages found in 'where' that pass the 'include' filter, but
+        not the 'exclude' filter.
+        """
+        for root, dirs, files in os.walk(where, followlinks=True):
+            # Copy dirs to iterate over it, then empty dirs.
+            all_dirs = dirs[:]
+            dirs[:] = []
+
+            for dir in all_dirs:
+                full_path = os.path.join(root, dir)
+                rel_path = os.path.relpath(full_path, where)
+                package = rel_path.replace(os.path.sep, '.')
+
+                # Skip directory trees that are not valid packages
+                if ('.' in dir or not cls._looks_like_package(full_path)):
+                    continue
+
+                # Should this package be included?
+                if include(package) and not exclude(package):
+                    yield package
+
+                # Keep searching subdirectories, as there may be more packages
+                # down there, even if the parent was excluded.
+                dirs.append(dir)
+
+    @staticmethod
+    def _looks_like_package(path):
+        """Does a directory look like a package?"""
+        return os.path.isfile(os.path.join(path, '__init__.py'))
+
+    @staticmethod
+    def _build_filter(*patterns):
+        """
+        Given a list of patterns, return a callable that will be true only if
+        the input matches at least one of the patterns.
+        """
+        return lambda name: any(fnmatchcase(name, pat=pat) for pat in patterns)
+
+
+class PEP420PackageFinder(PackageFinder):
+    @staticmethod
+    def _looks_like_package(path):
+        return True
+
+
+find_packages = PackageFinder.find
+
+if PY3:
+  find_namespace_packages = PEP420PackageFinder.find
+
+
+def _install_setup_requires(attrs):
+    # Note: do not use `setuptools.Distribution` directly, as
+    # our PEP 517 backend patch `distutils.core.Distribution`.
+    dist = distutils.core.Distribution(dict(
+        (k, v) for k, v in attrs.items()
+        if k in ('dependency_links', 'setup_requires')
+    ))
+    # Honor setup.cfg's options.
+    dist.parse_config_files(ignore_option_errors=True)
+    if dist.setup_requires:
+        dist.fetch_build_eggs(dist.setup_requires)
+
+
+def setup(**attrs):
+    # Make sure we have any requirements needed to interpret 'attrs'.
+    _install_setup_requires(attrs)
+    return distutils.core.setup(**attrs)
+
+setup.__doc__ = distutils.core.setup.__doc__
+
+
+_Command = monkey.get_unpatched(distutils.core.Command)
+
+
+class Command(_Command):
+    __doc__ = _Command.__doc__
+
+    command_consumes_arguments = False
+
+    def __init__(self, dist, **kw):
+        """
+        Construct the command for dist, updating
+        vars(self) with any keyword parameters.
+        """
+        _Command.__init__(self, dist)
+        vars(self).update(kw)
+
+    def _ensure_stringlike(self, option, what, default=None):
+        val = getattr(self, option)
+        if val is None:
+            setattr(self, option, default)
+            return default
+        elif not isinstance(val, string_types):
+            raise DistutilsOptionError("'%s' must be a %s (got `%s`)"
+                                       % (option, what, val))
+        return val
+
+    def ensure_string_list(self, option):
+        r"""Ensure that 'option' is a list of strings.  If 'option' is
+        currently a string, we split it either on /,\s*/ or /\s+/, so
+        "foo bar baz", "foo,bar,baz", and "foo,   bar baz" all become
+        ["foo", "bar", "baz"].
+        """
+        val = getattr(self, option)
+        if val is None:
+            return
+        elif isinstance(val, string_types):
+            setattr(self, option, re.split(r',\s*|\s+', val))
+        else:
+            if isinstance(val, list):
+                ok = all(isinstance(v, string_types) for v in val)
+            else:
+                ok = False
+            if not ok:
+                raise DistutilsOptionError(
+                      "'%s' must be a list of strings (got %r)"
+                      % (option, val))
+
+    def reinitialize_command(self, command, reinit_subcommands=0, **kw):
+        cmd = _Command.reinitialize_command(self, command, reinit_subcommands)
+        vars(cmd).update(kw)
+        return cmd
+
+
+def _find_all_simple(path):
+    """
+    Find all files under 'path'
+    """
+    results = (
+        os.path.join(base, file)
+        for base, dirs, files in os.walk(path, followlinks=True)
+        for file in files
+    )
+    return filter(os.path.isfile, results)
+
+
+def findall(dir=os.curdir):
+    """
+    Find all files under 'dir' and return the list of full filenames.
+    Unless dir is '.', return full filenames with dir prepended.
+    """
+    files = _find_all_simple(dir)
+    if dir == os.curdir:
+        make_rel = functools.partial(os.path.relpath, start=dir)
+        files = map(make_rel, files)
+    return list(files)
+
+
+# Apply monkey patches
+monkey.patch_all()
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diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_deprecation_warning.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_deprecation_warning.py
new file mode 100644
index 0000000..086b64d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_deprecation_warning.py
@@ -0,0 +1,7 @@
+class SetuptoolsDeprecationWarning(Warning):
+    """
+    Base class for warning deprecations in ``setuptools``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_imp.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_imp.py
new file mode 100644
index 0000000..a3cce9b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_imp.py
@@ -0,0 +1,73 @@
+"""
+Re-implementation of find_module and get_frozen_object
+from the deprecated imp module.
+"""
+
+import os
+import importlib.util
+import importlib.machinery
+
+from .py34compat import module_from_spec
+
+
+PY_SOURCE = 1
+PY_COMPILED = 2
+C_EXTENSION = 3
+C_BUILTIN = 6
+PY_FROZEN = 7
+
+
+def find_module(module, paths=None):
+    """Just like 'imp.find_module()', but with package support"""
+    spec = importlib.util.find_spec(module, paths)
+    if spec is None:
+        raise ImportError("Can't find %s" % module)
+    if not spec.has_location and hasattr(spec, 'submodule_search_locations'):
+        spec = importlib.util.spec_from_loader('__init__.py', spec.loader)
+
+    kind = -1
+    file = None
+    static = isinstance(spec.loader, type)
+    if spec.origin == 'frozen' or static and issubclass(
+            spec.loader, importlib.machinery.FrozenImporter):
+        kind = PY_FROZEN
+        path = None  # imp compabilty
+        suffix = mode = ''  # imp compability
+    elif spec.origin == 'built-in' or static and issubclass(
+            spec.loader, importlib.machinery.BuiltinImporter):
+        kind = C_BUILTIN
+        path = None  # imp compabilty
+        suffix = mode = ''  # imp compability
+    elif spec.has_location:
+        path = spec.origin
+        suffix = os.path.splitext(path)[1]
+        mode = 'r' if suffix in importlib.machinery.SOURCE_SUFFIXES else 'rb'
+
+        if suffix in importlib.machinery.SOURCE_SUFFIXES:
+            kind = PY_SOURCE
+        elif suffix in importlib.machinery.BYTECODE_SUFFIXES:
+            kind = PY_COMPILED
+        elif suffix in importlib.machinery.EXTENSION_SUFFIXES:
+            kind = C_EXTENSION
+
+        if kind in {PY_SOURCE, PY_COMPILED}:
+            file = open(path, mode)
+    else:
+        path = None
+        suffix = mode = ''
+
+    return file, path, (suffix, mode, kind)
+
+
+def get_frozen_object(module, paths=None):
+    spec = importlib.util.find_spec(module, paths)
+    if not spec:
+        raise ImportError("Can't find %s" % module)
+    return spec.loader.get_code(module)
+
+
+def get_module(module, paths, info):
+    spec = importlib.util.find_spec(module, paths)
+    if not spec:
+        raise ImportError("Can't find %s" % module)
+    return module_from_spec(spec)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/ordered_set.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/ordered_set.py
new file mode 100644
index 0000000..1487600
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/ordered_set.py
@@ -0,0 +1,488 @@
+"""
+An OrderedSet is a custom MutableSet that remembers its order, so that every
+entry has an index that can be looked up.
+
+Based on a recipe originally posted to ActiveState Recipes by Raymond Hettiger,
+and released under the MIT license.
+"""
+import itertools as it
+from collections import deque
+
+try:
+    # Python 3
+    from collections.abc import MutableSet, Sequence
+except ImportError:
+    # Python 2.7
+    from collections import MutableSet, Sequence
+
+SLICE_ALL = slice(None)
+__version__ = "3.1"
+
+
+def is_iterable(obj):
+    """
+    Are we being asked to look up a list of things, instead of a single thing?
+    We check for the `__iter__` attribute so that this can cover types that
+    don't have to be known by this module, such as NumPy arrays.
+
+    Strings, however, should be considered as atomic values to look up, not
+    iterables. The same goes for tuples, since they are immutable and therefore
+    valid entries.
+
+    We don't need to check for the Python 2 `unicode` type, because it doesn't
+    have an `__iter__` attribute anyway.
+    """
+    return (
+        hasattr(obj, "__iter__")
+        and not isinstance(obj, str)
+        and not isinstance(obj, tuple)
+    )
+
+
+class OrderedSet(MutableSet, Sequence):
+    """
+    An OrderedSet is a custom MutableSet that remembers its order, so that
+    every entry has an index that can be looked up.
+
+    Example:
+        >>> OrderedSet([1, 1, 2, 3, 2])
+        OrderedSet([1, 2, 3])
+    """
+
+    def __init__(self, iterable=None):
+        self.items = []
+        self.map = {}
+        if iterable is not None:
+            self |= iterable
+
+    def __len__(self):
+        """
+        Returns the number of unique elements in the ordered set
+
+        Example:
+            >>> len(OrderedSet([]))
+            0
+            >>> len(OrderedSet([1, 2]))
+            2
+        """
+        return len(self.items)
+
+    def __getitem__(self, index):
+        """
+        Get the item at a given index.
+
+        If `index` is a slice, you will get back that slice of items, as a
+        new OrderedSet.
+
+        If `index` is a list or a similar iterable, you'll get a list of
+        items corresponding to those indices. This is similar to NumPy's
+        "fancy indexing". The result is not an OrderedSet because you may ask
+        for duplicate indices, and the number of elements returned should be
+        the number of elements asked for.
+
+        Example:
+            >>> oset = OrderedSet([1, 2, 3])
+            >>> oset[1]
+            2
+        """
+        if isinstance(index, slice) and index == SLICE_ALL:
+            return self.copy()
+        elif is_iterable(index):
+            return [self.items[i] for i in index]
+        elif hasattr(index, "__index__") or isinstance(index, slice):
+            result = self.items[index]
+            if isinstance(result, list):
+                return self.__class__(result)
+            else:
+                return result
+        else:
+            raise TypeError("Don't know how to index an OrderedSet by %r" % index)
+
+    def copy(self):
+        """
+        Return a shallow copy of this object.
+
+        Example:
+            >>> this = OrderedSet([1, 2, 3])
+            >>> other = this.copy()
+            >>> this == other
+            True
+            >>> this is other
+            False
+        """
+        return self.__class__(self)
+
+    def __getstate__(self):
+        if len(self) == 0:
+            # The state can't be an empty list.
+            # We need to return a truthy value, or else __setstate__ won't be run.
+            #
+            # This could have been done more gracefully by always putting the state
+            # in a tuple, but this way is backwards- and forwards- compatible with
+            # previous versions of OrderedSet.
+            return (None,)
+        else:
+            return list(self)
+
+    def __setstate__(self, state):
+        if state == (None,):
+            self.__init__([])
+        else:
+            self.__init__(state)
+
+    def __contains__(self, key):
+        """
+        Test if the item is in this ordered set
+
+        Example:
+            >>> 1 in OrderedSet([1, 3, 2])
+            True
+            >>> 5 in OrderedSet([1, 3, 2])
+            False
+        """
+        return key in self.map
+
+    def add(self, key):
+        """
+        Add `key` as an item to this OrderedSet, then return its index.
+
+        If `key` is already in the OrderedSet, return the index it already
+        had.
+
+        Example:
+            >>> oset = OrderedSet()
+            >>> oset.append(3)
+            0
+            >>> print(oset)
+            OrderedSet([3])
+        """
+        if key not in self.map:
+            self.map[key] = len(self.items)
+            self.items.append(key)
+        return self.map[key]
+
+    append = add
+
+    def update(self, sequence):
+        """
+        Update the set with the given iterable sequence, then return the index
+        of the last element inserted.
+
+        Example:
+            >>> oset = OrderedSet([1, 2, 3])
+            >>> oset.update([3, 1, 5, 1, 4])
+            4
+            >>> print(oset)
+            OrderedSet([1, 2, 3, 5, 4])
+        """
+        item_index = None
+        try:
+            for item in sequence:
+                item_index = self.add(item)
+        except TypeError:
+            raise ValueError(
+                "Argument needs to be an iterable, got %s" % type(sequence)
+            )
+        return item_index
+
+    def index(self, key):
+        """
+        Get the index of a given entry, raising an IndexError if it's not
+        present.
+
+        `key` can be an iterable of entries that is not a string, in which case
+        this returns a list of indices.
+
+        Example:
+            >>> oset = OrderedSet([1, 2, 3])
+            >>> oset.index(2)
+            1
+        """
+        if is_iterable(key):
+            return [self.index(subkey) for subkey in key]
+        return self.map[key]
+
+    # Provide some compatibility with pd.Index
+    get_loc = index
+    get_indexer = index
+
+    def pop(self):
+        """
+        Remove and return the last element from the set.
+
+        Raises KeyError if the set is empty.
+
+        Example:
+            >>> oset = OrderedSet([1, 2, 3])
+            >>> oset.pop()
+            3
+        """
+        if not self.items:
+            raise KeyError("Set is empty")
+
+        elem = self.items[-1]
+        del self.items[-1]
+        del self.map[elem]
+        return elem
+
+    def discard(self, key):
+        """
+        Remove an element.  Do not raise an exception if absent.
+
+        The MutableSet mixin uses this to implement the .remove() method, which
+        *does* raise an error when asked to remove a non-existent item.
+
+        Example:
+            >>> oset = OrderedSet([1, 2, 3])
+            >>> oset.discard(2)
+            >>> print(oset)
+            OrderedSet([1, 3])
+            >>> oset.discard(2)
+            >>> print(oset)
+            OrderedSet([1, 3])
+        """
+        if key in self:
+            i = self.map[key]
+            del self.items[i]
+            del self.map[key]
+            for k, v in self.map.items():
+                if v >= i:
+                    self.map[k] = v - 1
+
+    def clear(self):
+        """
+        Remove all items from this OrderedSet.
+        """
+        del self.items[:]
+        self.map.clear()
+
+    def __iter__(self):
+        """
+        Example:
+            >>> list(iter(OrderedSet([1, 2, 3])))
+            [1, 2, 3]
+        """
+        return iter(self.items)
+
+    def __reversed__(self):
+        """
+        Example:
+            >>> list(reversed(OrderedSet([1, 2, 3])))
+            [3, 2, 1]
+        """
+        return reversed(self.items)
+
+    def __repr__(self):
+        if not self:
+            return "%s()" % (self.__class__.__name__,)
+        return "%s(%r)" % (self.__class__.__name__, list(self))
+
+    def __eq__(self, other):
+        """
+        Returns true if the containers have the same items. If `other` is a
+        Sequence, then order is checked, otherwise it is ignored.
+
+        Example:
+            >>> oset = OrderedSet([1, 3, 2])
+            >>> oset == [1, 3, 2]
+            True
+            >>> oset == [1, 2, 3]
+            False
+            >>> oset == [2, 3]
+            False
+            >>> oset == OrderedSet([3, 2, 1])
+            False
+        """
+        # In Python 2 deque is not a Sequence, so treat it as one for
+        # consistent behavior with Python 3.
+        if isinstance(other, (Sequence, deque)):
+            # Check that this OrderedSet contains the same elements, in the
+            # same order, as the other object.
+            return list(self) == list(other)
+        try:
+            other_as_set = set(other)
+        except TypeError:
+            # If `other` can't be converted into a set, it's not equal.
+            return False
+        else:
+            return set(self) == other_as_set
+
+    def union(self, *sets):
+        """
+        Combines all unique items.
+        Each items order is defined by its first appearance.
+
+        Example:
+            >>> oset = OrderedSet.union(OrderedSet([3, 1, 4, 1, 5]), [1, 3], [2, 0])
+            >>> print(oset)
+            OrderedSet([3, 1, 4, 5, 2, 0])
+            >>> oset.union([8, 9])
+            OrderedSet([3, 1, 4, 5, 2, 0, 8, 9])
+            >>> oset | {10}
+            OrderedSet([3, 1, 4, 5, 2, 0, 10])
+        """
+        cls = self.__class__ if isinstance(self, OrderedSet) else OrderedSet
+        containers = map(list, it.chain([self], sets))
+        items = it.chain.from_iterable(containers)
+        return cls(items)
+
+    def __and__(self, other):
+        # the parent implementation of this is backwards
+        return self.intersection(other)
+
+    def intersection(self, *sets):
+        """
+        Returns elements in common between all sets. Order is defined only
+        by the first set.
+
+        Example:
+            >>> oset = OrderedSet.intersection(OrderedSet([0, 1, 2, 3]), [1, 2, 3])
+            >>> print(oset)
+            OrderedSet([1, 2, 3])
+            >>> oset.intersection([2, 4, 5], [1, 2, 3, 4])
+            OrderedSet([2])
+            >>> oset.intersection()
+            OrderedSet([1, 2, 3])
+        """
+        cls = self.__class__ if isinstance(self, OrderedSet) else OrderedSet
+        if sets:
+            common = set.intersection(*map(set, sets))
+            items = (item for item in self if item in common)
+        else:
+            items = self
+        return cls(items)
+
+    def difference(self, *sets):
+        """
+        Returns all elements that are in this set but not the others.
+
+        Example:
+            >>> OrderedSet([1, 2, 3]).difference(OrderedSet([2]))
+            OrderedSet([1, 3])
+            >>> OrderedSet([1, 2, 3]).difference(OrderedSet([2]), OrderedSet([3]))
+            OrderedSet([1])
+            >>> OrderedSet([1, 2, 3]) - OrderedSet([2])
+            OrderedSet([1, 3])
+            >>> OrderedSet([1, 2, 3]).difference()
+            OrderedSet([1, 2, 3])
+        """
+        cls = self.__class__
+        if sets:
+            other = set.union(*map(set, sets))
+            items = (item for item in self if item not in other)
+        else:
+            items = self
+        return cls(items)
+
+    def issubset(self, other):
+        """
+        Report whether another set contains this set.
+
+        Example:
+            >>> OrderedSet([1, 2, 3]).issubset({1, 2})
+            False
+            >>> OrderedSet([1, 2, 3]).issubset({1, 2, 3, 4})
+            True
+            >>> OrderedSet([1, 2, 3]).issubset({1, 4, 3, 5})
+            False
+        """
+        if len(self) > len(other):  # Fast check for obvious cases
+            return False
+        return all(item in other for item in self)
+
+    def issuperset(self, other):
+        """
+        Report whether this set contains another set.
+
+        Example:
+            >>> OrderedSet([1, 2]).issuperset([1, 2, 3])
+            False
+            >>> OrderedSet([1, 2, 3, 4]).issuperset({1, 2, 3})
+            True
+            >>> OrderedSet([1, 4, 3, 5]).issuperset({1, 2, 3})
+            False
+        """
+        if len(self) < len(other):  # Fast check for obvious cases
+            return False
+        return all(item in self for item in other)
+
+    def symmetric_difference(self, other):
+        """
+        Return the symmetric difference of two OrderedSets as a new set.
+        That is, the new set will contain all elements that are in exactly
+        one of the sets.
+
+        Their order will be preserved, with elements from `self` preceding
+        elements from `other`.
+
+        Example:
+            >>> this = OrderedSet([1, 4, 3, 5, 7])
+            >>> other = OrderedSet([9, 7, 1, 3, 2])
+            >>> this.symmetric_difference(other)
+            OrderedSet([4, 5, 9, 2])
+        """
+        cls = self.__class__ if isinstance(self, OrderedSet) else OrderedSet
+        diff1 = cls(self).difference(other)
+        diff2 = cls(other).difference(self)
+        return diff1.union(diff2)
+
+    def _update_items(self, items):
+        """
+        Replace the 'items' list of this OrderedSet with a new one, updating
+        self.map accordingly.
+        """
+        self.items = items
+        self.map = {item: idx for (idx, item) in enumerate(items)}
+
+    def difference_update(self, *sets):
+        """
+        Update this OrderedSet to remove items from one or more other sets.
+
+        Example:
+            >>> this = OrderedSet([1, 2, 3])
+            >>> this.difference_update(OrderedSet([2, 4]))
+            >>> print(this)
+            OrderedSet([1, 3])
+
+            >>> this = OrderedSet([1, 2, 3, 4, 5])
+            >>> this.difference_update(OrderedSet([2, 4]), OrderedSet([1, 4, 6]))
+            >>> print(this)
+            OrderedSet([3, 5])
+        """
+        items_to_remove = set()
+        for other in sets:
+            items_to_remove |= set(other)
+        self._update_items([item for item in self.items if item not in items_to_remove])
+
+    def intersection_update(self, other):
+        """
+        Update this OrderedSet to keep only items in another set, preserving
+        their order in this set.
+
+        Example:
+            >>> this = OrderedSet([1, 4, 3, 5, 7])
+            >>> other = OrderedSet([9, 7, 1, 3, 2])
+            >>> this.intersection_update(other)
+            >>> print(this)
+            OrderedSet([1, 3, 7])
+        """
+        other = set(other)
+        self._update_items([item for item in self.items if item in other])
+
+    def symmetric_difference_update(self, other):
+        """
+        Update this OrderedSet to remove items from another set, then
+        add items from the other set that were not present in this set.
+
+        Example:
+            >>> this = OrderedSet([1, 4, 3, 5, 7])
+            >>> other = OrderedSet([9, 7, 1, 3, 2])
+            >>> this.symmetric_difference_update(other)
+            >>> print(this)
+            OrderedSet([4, 5, 9, 2])
+        """
+        items_to_add = [item for item in other if item not in self]
+        items_to_remove = set(other)
+        self._update_items(
+            [item for item in self.items if item not in items_to_remove] + items_to_add
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/__about__.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/__about__.py
new file mode 100644
index 0000000..95d330e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/__about__.py
@@ -0,0 +1,21 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+__all__ = [
+    "__title__", "__summary__", "__uri__", "__version__", "__author__",
+    "__email__", "__license__", "__copyright__",
+]
+
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
+
+__version__ = "16.8"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD or Apache License, Version 2.0"
+__copyright__ = "Copyright 2014-2016 %s" % __author__
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/__init__.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/__init__.py
new file mode 100644
index 0000000..5ee6220
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/__init__.py
@@ -0,0 +1,14 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+from .__about__ import (
+    __author__, __copyright__, __email__, __license__, __summary__, __title__,
+    __uri__, __version__
+)
+
+__all__ = [
+    "__title__", "__summary__", "__uri__", "__version__", "__author__",
+    "__email__", "__license__", "__copyright__",
+]
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diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/_compat.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/_compat.py
new file mode 100644
index 0000000..210bb80
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/_compat.py
@@ -0,0 +1,30 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import sys
+
+
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+
+# flake8: noqa
+
+if PY3:
+    string_types = str,
+else:
+    string_types = basestring,
+
+
+def with_metaclass(meta, *bases):
+    """
+    Create a base class with a metaclass.
+    """
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/_structures.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/_structures.py
new file mode 100644
index 0000000..ccc2786
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/_structures.py
@@ -0,0 +1,68 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+
+class Infinity(object):
+
+    def __repr__(self):
+        return "Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return False
+
+    def __le__(self, other):
+        return False
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return True
+
+    def __ge__(self, other):
+        return True
+
+    def __neg__(self):
+        return NegativeInfinity
+
+Infinity = Infinity()
+
+
+class NegativeInfinity(object):
+
+    def __repr__(self):
+        return "-Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return True
+
+    def __le__(self, other):
+        return True
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return False
+
+    def __ge__(self, other):
+        return False
+
+    def __neg__(self):
+        return Infinity
+
+NegativeInfinity = NegativeInfinity()
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/markers.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/markers.py
new file mode 100644
index 0000000..031332a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/markers.py
@@ -0,0 +1,301 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import operator
+import os
+import platform
+import sys
+
+from setuptools.extern.pyparsing import ParseException, ParseResults, stringStart, stringEnd
+from setuptools.extern.pyparsing import ZeroOrMore, Group, Forward, QuotedString
+from setuptools.extern.pyparsing import Literal as L  # noqa
+
+from ._compat import string_types
+from .specifiers import Specifier, InvalidSpecifier
+
+
+__all__ = [
+    "InvalidMarker", "UndefinedComparison", "UndefinedEnvironmentName",
+    "Marker", "default_environment",
+]
+
+
+class InvalidMarker(ValueError):
+    """
+    An invalid marker was found, users should refer to PEP 508.
+    """
+
+
+class UndefinedComparison(ValueError):
+    """
+    An invalid operation was attempted on a value that doesn't support it.
+    """
+
+
+class UndefinedEnvironmentName(ValueError):
+    """
+    A name was attempted to be used that does not exist inside of the
+    environment.
+    """
+
+
+class Node(object):
+
+    def __init__(self, value):
+        self.value = value
+
+    def __str__(self):
+        return str(self.value)
+
+    def __repr__(self):
+        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
+
+    def serialize(self):
+        raise NotImplementedError
+
+
+class Variable(Node):
+
+    def serialize(self):
+        return str(self)
+
+
+class Value(Node):
+
+    def serialize(self):
+        return '"{0}"'.format(self)
+
+
+class Op(Node):
+
+    def serialize(self):
+        return str(self)
+
+
+VARIABLE = (
+    L("implementation_version") |
+    L("platform_python_implementation") |
+    L("implementation_name") |
+    L("python_full_version") |
+    L("platform_release") |
+    L("platform_version") |
+    L("platform_machine") |
+    L("platform_system") |
+    L("python_version") |
+    L("sys_platform") |
+    L("os_name") |
+    L("os.name") |  # PEP-345
+    L("sys.platform") |  # PEP-345
+    L("platform.version") |  # PEP-345
+    L("platform.machine") |  # PEP-345
+    L("platform.python_implementation") |  # PEP-345
+    L("python_implementation") |  # undocumented setuptools legacy
+    L("extra")
+)
+ALIASES = {
+    'os.name': 'os_name',
+    'sys.platform': 'sys_platform',
+    'platform.version': 'platform_version',
+    'platform.machine': 'platform_machine',
+    'platform.python_implementation': 'platform_python_implementation',
+    'python_implementation': 'platform_python_implementation'
+}
+VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
+
+VERSION_CMP = (
+    L("===") |
+    L("==") |
+    L(">=") |
+    L("<=") |
+    L("!=") |
+    L("~=") |
+    L(">") |
+    L("<")
+)
+
+MARKER_OP = VERSION_CMP | L("not in") | L("in")
+MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
+
+MARKER_VALUE = QuotedString("'") | QuotedString('"')
+MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
+
+BOOLOP = L("and") | L("or")
+
+MARKER_VAR = VARIABLE | MARKER_VALUE
+
+MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
+MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
+
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+
+MARKER_EXPR = Forward()
+MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
+MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
+
+MARKER = stringStart + MARKER_EXPR + stringEnd
+
+
+def _coerce_parse_result(results):
+    if isinstance(results, ParseResults):
+        return [_coerce_parse_result(i) for i in results]
+    else:
+        return results
+
+
+def _format_marker(marker, first=True):
+    assert isinstance(marker, (list, tuple, string_types))
+
+    # Sometimes we have a structure like [[...]] which is a single item list
+    # where the single item is itself it's own list. In that case we want skip
+    # the rest of this function so that we don't get extraneous () on the
+    # outside.
+    if (isinstance(marker, list) and len(marker) == 1 and
+            isinstance(marker[0], (list, tuple))):
+        return _format_marker(marker[0])
+
+    if isinstance(marker, list):
+        inner = (_format_marker(m, first=False) for m in marker)
+        if first:
+            return " ".join(inner)
+        else:
+            return "(" + " ".join(inner) + ")"
+    elif isinstance(marker, tuple):
+        return " ".join([m.serialize() for m in marker])
+    else:
+        return marker
+
+
+_operators = {
+    "in": lambda lhs, rhs: lhs in rhs,
+    "not in": lambda lhs, rhs: lhs not in rhs,
+    "<": operator.lt,
+    "<=": operator.le,
+    "==": operator.eq,
+    "!=": operator.ne,
+    ">=": operator.ge,
+    ">": operator.gt,
+}
+
+
+def _eval_op(lhs, op, rhs):
+    try:
+        spec = Specifier("".join([op.serialize(), rhs]))
+    except InvalidSpecifier:
+        pass
+    else:
+        return spec.contains(lhs)
+
+    oper = _operators.get(op.serialize())
+    if oper is None:
+        raise UndefinedComparison(
+            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
+        )
+
+    return oper(lhs, rhs)
+
+
+_undefined = object()
+
+
+def _get_env(environment, name):
+    value = environment.get(name, _undefined)
+
+    if value is _undefined:
+        raise UndefinedEnvironmentName(
+            "{0!r} does not exist in evaluation environment.".format(name)
+        )
+
+    return value
+
+
+def _evaluate_markers(markers, environment):
+    groups = [[]]
+
+    for marker in markers:
+        assert isinstance(marker, (list, tuple, string_types))
+
+        if isinstance(marker, list):
+            groups[-1].append(_evaluate_markers(marker, environment))
+        elif isinstance(marker, tuple):
+            lhs, op, rhs = marker
+
+            if isinstance(lhs, Variable):
+                lhs_value = _get_env(environment, lhs.value)
+                rhs_value = rhs.value
+            else:
+                lhs_value = lhs.value
+                rhs_value = _get_env(environment, rhs.value)
+
+            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
+        else:
+            assert marker in ["and", "or"]
+            if marker == "or":
+                groups.append([])
+
+    return any(all(item) for item in groups)
+
+
+def format_full_version(info):
+    version = '{0.major}.{0.minor}.{0.micro}'.format(info)
+    kind = info.releaselevel
+    if kind != 'final':
+        version += kind[0] + str(info.serial)
+    return version
+
+
+def default_environment():
+    if hasattr(sys, 'implementation'):
+        iver = format_full_version(sys.implementation.version)
+        implementation_name = sys.implementation.name
+    else:
+        iver = '0'
+        implementation_name = ''
+
+    return {
+        "implementation_name": implementation_name,
+        "implementation_version": iver,
+        "os_name": os.name,
+        "platform_machine": platform.machine(),
+        "platform_release": platform.release(),
+        "platform_system": platform.system(),
+        "platform_version": platform.version(),
+        "python_full_version": platform.python_version(),
+        "platform_python_implementation": platform.python_implementation(),
+        "python_version": platform.python_version()[:3],
+        "sys_platform": sys.platform,
+    }
+
+
+class Marker(object):
+
+    def __init__(self, marker):
+        try:
+            self._markers = _coerce_parse_result(MARKER.parseString(marker))
+        except ParseException as e:
+            err_str = "Invalid marker: {0!r}, parse error at {1!r}".format(
+                marker, marker[e.loc:e.loc + 8])
+            raise InvalidMarker(err_str)
+
+    def __str__(self):
+        return _format_marker(self._markers)
+
+    def __repr__(self):
+        return "<Marker({0!r})>".format(str(self))
+
+    def evaluate(self, environment=None):
+        """Evaluate a marker.
+
+        Return the boolean from evaluating the given marker against the
+        environment. environment is an optional argument to override all or
+        part of the determined environment.
+
+        The environment is determined from the current Python process.
+        """
+        current_environment = default_environment()
+        if environment is not None:
+            current_environment.update(environment)
+
+        return _evaluate_markers(self._markers, current_environment)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/requirements.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/requirements.py
new file mode 100644
index 0000000..5b49341
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/requirements.py
@@ -0,0 +1,127 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import string
+import re
+
+from setuptools.extern.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
+from setuptools.extern.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
+from setuptools.extern.pyparsing import Literal as L  # noqa
+from setuptools.extern.six.moves.urllib import parse as urlparse
+
+from .markers import MARKER_EXPR, Marker
+from .specifiers import LegacySpecifier, Specifier, SpecifierSet
+
+
+class InvalidRequirement(ValueError):
+    """
+    An invalid requirement was found, users should refer to PEP 508.
+    """
+
+
+ALPHANUM = Word(string.ascii_letters + string.digits)
+
+LBRACKET = L("[").suppress()
+RBRACKET = L("]").suppress()
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+COMMA = L(",").suppress()
+SEMICOLON = L(";").suppress()
+AT = L("@").suppress()
+
+PUNCTUATION = Word("-_.")
+IDENTIFIER_END = ALPHANUM | (ZeroOrMore(PUNCTUATION) + ALPHANUM)
+IDENTIFIER = Combine(ALPHANUM + ZeroOrMore(IDENTIFIER_END))
+
+NAME = IDENTIFIER("name")
+EXTRA = IDENTIFIER
+
+URI = Regex(r'[^ ]+')("url")
+URL = (AT + URI)
+
+EXTRAS_LIST = EXTRA + ZeroOrMore(COMMA + EXTRA)
+EXTRAS = (LBRACKET + Optional(EXTRAS_LIST) + RBRACKET)("extras")
+
+VERSION_PEP440 = Regex(Specifier._regex_str, re.VERBOSE | re.IGNORECASE)
+VERSION_LEGACY = Regex(LegacySpecifier._regex_str, re.VERBOSE | re.IGNORECASE)
+
+VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
+VERSION_MANY = Combine(VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE),
+                       joinString=",", adjacent=False)("_raw_spec")
+_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
+_VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or '')
+
+VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
+VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
+
+MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
+MARKER_EXPR.setParseAction(
+    lambda s, l, t: Marker(s[t._original_start:t._original_end])
+)
+MARKER_SEPERATOR = SEMICOLON
+MARKER = MARKER_SEPERATOR + MARKER_EXPR
+
+VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
+URL_AND_MARKER = URL + Optional(MARKER)
+
+NAMED_REQUIREMENT = \
+    NAME + Optional(EXTRAS) + (URL_AND_MARKER | VERSION_AND_MARKER)
+
+REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
+
+
+class Requirement(object):
+    """Parse a requirement.
+
+    Parse a given requirement string into its parts, such as name, specifier,
+    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
+    string.
+    """
+
+    # TODO: Can we test whether something is contained within a requirement?
+    #       If so how do we do that? Do we need to test against the _name_ of
+    #       the thing as well as the version? What about the markers?
+    # TODO: Can we normalize the name and extra name?
+
+    def __init__(self, requirement_string):
+        try:
+            req = REQUIREMENT.parseString(requirement_string)
+        except ParseException as e:
+            raise InvalidRequirement(
+                "Invalid requirement, parse error at \"{0!r}\"".format(
+                    requirement_string[e.loc:e.loc + 8]))
+
+        self.name = req.name
+        if req.url:
+            parsed_url = urlparse.urlparse(req.url)
+            if not (parsed_url.scheme and parsed_url.netloc) or (
+                    not parsed_url.scheme and not parsed_url.netloc):
+                raise InvalidRequirement("Invalid URL given")
+            self.url = req.url
+        else:
+            self.url = None
+        self.extras = set(req.extras.asList() if req.extras else [])
+        self.specifier = SpecifierSet(req.specifier)
+        self.marker = req.marker if req.marker else None
+
+    def __str__(self):
+        parts = [self.name]
+
+        if self.extras:
+            parts.append("[{0}]".format(",".join(sorted(self.extras))))
+
+        if self.specifier:
+            parts.append(str(self.specifier))
+
+        if self.url:
+            parts.append("@ {0}".format(self.url))
+
+        if self.marker:
+            parts.append("; {0}".format(self.marker))
+
+        return "".join(parts)
+
+    def __repr__(self):
+        return "<Requirement({0!r})>".format(str(self))
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/specifiers.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/specifiers.py
new file mode 100644
index 0000000..7f5a76c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/specifiers.py
@@ -0,0 +1,774 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import abc
+import functools
+import itertools
+import re
+
+from ._compat import string_types, with_metaclass
+from .version import Version, LegacyVersion, parse
+
+
+class InvalidSpecifier(ValueError):
+    """
+    An invalid specifier was found, users should refer to PEP 440.
+    """
+
+
+class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):
+
+    @abc.abstractmethod
+    def __str__(self):
+        """
+        Returns the str representation of this Specifier like object. This
+        should be representative of the Specifier itself.
+        """
+
+    @abc.abstractmethod
+    def __hash__(self):
+        """
+        Returns a hash value for this Specifier like object.
+        """
+
+    @abc.abstractmethod
+    def __eq__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are equal.
+        """
+
+    @abc.abstractmethod
+    def __ne__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are not equal.
+        """
+
+    @abc.abstractproperty
+    def prereleases(self):
+        """
+        Returns whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @prereleases.setter
+    def prereleases(self, value):
+        """
+        Sets whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @abc.abstractmethod
+    def contains(self, item, prereleases=None):
+        """
+        Determines if the given item is contained within this specifier.
+        """
+
+    @abc.abstractmethod
+    def filter(self, iterable, prereleases=None):
+        """
+        Takes an iterable of items and filters them so that only items which
+        are contained within this specifier are allowed in it.
+        """
+
+
+class _IndividualSpecifier(BaseSpecifier):
+
+    _operators = {}
+
+    def __init__(self, spec="", prereleases=None):
+        match = self._regex.search(spec)
+        if not match:
+            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+
+        self._spec = (
+            match.group("operator").strip(),
+            match.group("version").strip(),
+        )
+
+        # Store whether or not this Specifier should accept prereleases
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<{0}({1!r}{2})>".format(
+            self.__class__.__name__,
+            str(self),
+            pre,
+        )
+
+    def __str__(self):
+        return "{0}{1}".format(*self._spec)
+
+    def __hash__(self):
+        return hash(self._spec)
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec == other._spec
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec != other._spec
+
+    def _get_operator(self, op):
+        return getattr(self, "_compare_{0}".format(self._operators[op]))
+
+    def _coerce_version(self, version):
+        if not isinstance(version, (LegacyVersion, Version)):
+            version = parse(version)
+        return version
+
+    @property
+    def operator(self):
+        return self._spec[0]
+
+    @property
+    def version(self):
+        return self._spec[1]
+
+    @property
+    def prereleases(self):
+        return self._prereleases
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Determine if prereleases are to be allowed or not.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # Normalize item to a Version or LegacyVersion, this allows us to have
+        # a shortcut for ``"2.0" in Specifier(">=2")
+        item = self._coerce_version(item)
+
+        # Determine if we should be supporting prereleases in this specifier
+        # or not, if we do not support prereleases than we can short circuit
+        # logic if this version is a prereleases.
+        if item.is_prerelease and not prereleases:
+            return False
+
+        # Actually do the comparison to determine if this item is contained
+        # within this Specifier or not.
+        return self._get_operator(self.operator)(item, self.version)
+
+    def filter(self, iterable, prereleases=None):
+        yielded = False
+        found_prereleases = []
+
+        kw = {"prereleases": prereleases if prereleases is not None else True}
+
+        # Attempt to iterate over all the values in the iterable and if any of
+        # them match, yield them.
+        for version in iterable:
+            parsed_version = self._coerce_version(version)
+
+            if self.contains(parsed_version, **kw):
+                # If our version is a prerelease, and we were not set to allow
+                # prereleases, then we'll store it for later incase nothing
+                # else matches this specifier.
+                if (parsed_version.is_prerelease and not
+                        (prereleases or self.prereleases)):
+                    found_prereleases.append(version)
+                # Either this is not a prerelease, or we should have been
+                # accepting prereleases from the begining.
+                else:
+                    yielded = True
+                    yield version
+
+        # Now that we've iterated over everything, determine if we've yielded
+        # any values, and if we have not and we have any prereleases stored up
+        # then we will go ahead and yield the prereleases.
+        if not yielded and found_prereleases:
+            for version in found_prereleases:
+                yield version
+
+
+class LegacySpecifier(_IndividualSpecifier):
+
+    _regex_str = (
+        r"""
+        (?P<operator>(==|!=|<=|>=|<|>))
+        \s*
+        (?P<version>
+            [^,;\s)]* # Since this is a "legacy" specifier, and the version
+                      # string can be just about anything, we match everything
+                      # except for whitespace, a semi-colon for marker support,
+                      # a closing paren since versions can be enclosed in
+                      # them, and a comma since it's a version separator.
+        )
+        """
+    )
+
+    _regex = re.compile(
+        r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+    }
+
+    def _coerce_version(self, version):
+        if not isinstance(version, LegacyVersion):
+            version = LegacyVersion(str(version))
+        return version
+
+    def _compare_equal(self, prospective, spec):
+        return prospective == self._coerce_version(spec)
+
+    def _compare_not_equal(self, prospective, spec):
+        return prospective != self._coerce_version(spec)
+
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= self._coerce_version(spec)
+
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= self._coerce_version(spec)
+
+    def _compare_less_than(self, prospective, spec):
+        return prospective < self._coerce_version(spec)
+
+    def _compare_greater_than(self, prospective, spec):
+        return prospective > self._coerce_version(spec)
+
+
+def _require_version_compare(fn):
+    @functools.wraps(fn)
+    def wrapped(self, prospective, spec):
+        if not isinstance(prospective, Version):
+            return False
+        return fn(self, prospective, spec)
+    return wrapped
+
+
+class Specifier(_IndividualSpecifier):
+
+    _regex_str = (
+        r"""
+        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
+        (?P<version>
+            (?:
+                # The identity operators allow for an escape hatch that will
+                # do an exact string match of the version you wish to install.
+                # This will not be parsed by PEP 440 and we cannot determine
+                # any semantic meaning from it. This operator is discouraged
+                # but included entirely as an escape hatch.
+                (?<====)  # Only match for the identity operator
+                \s*
+                [^\s]*    # We just match everything, except for whitespace
+                          # since we are only testing for strict identity.
+            )
+            |
+            (?:
+                # The (non)equality operators allow for wild card and local
+                # versions to be specified so we have to define these two
+                # operators separately to enable that.
+                (?<===|!=)            # Only match for equals and not equals
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+
+                # You cannot use a wild card and a dev or local version
+                # together so group them with a | and make them optional.
+                (?:
+                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+                    |
+                    \.\*  # Wild card syntax of .*
+                )?
+            )
+            |
+            (?:
+                # The compatible operator requires at least two digits in the
+                # release segment.
+                (?<=~=)               # Only match for the compatible operator
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+            |
+            (?:
+                # All other operators only allow a sub set of what the
+                # (non)equality operators do. Specifically they do not allow
+                # local versions to be specified nor do they allow the prefix
+                # matching wild cards.
+                (?<!==|!=|~=)         # We have special cases for these
+                                      # operators so we want to make sure they
+                                      # don't match here.
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+        )
+        """
+    )
+
+    _regex = re.compile(
+        r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "~=": "compatible",
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+        "===": "arbitrary",
+    }
+
+    @_require_version_compare
+    def _compare_compatible(self, prospective, spec):
+        # Compatible releases have an equivalent combination of >= and ==. That
+        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
+        # implement this in terms of the other specifiers instead of
+        # implementing it ourselves. The only thing we need to do is construct
+        # the other specifiers.
+
+        # We want everything but the last item in the version, but we want to
+        # ignore post and dev releases and we want to treat the pre-release as
+        # it's own separate segment.
+        prefix = ".".join(
+            list(
+                itertools.takewhile(
+                    lambda x: (not x.startswith("post") and not
+                               x.startswith("dev")),
+                    _version_split(spec),
+                )
+            )[:-1]
+        )
+
+        # Add the prefix notation to the end of our string
+        prefix += ".*"
+
+        return (self._get_operator(">=")(prospective, spec) and
+                self._get_operator("==")(prospective, prefix))
+
+    @_require_version_compare
+    def _compare_equal(self, prospective, spec):
+        # We need special logic to handle prefix matching
+        if spec.endswith(".*"):
+            # In the case of prefix matching we want to ignore local segment.
+            prospective = Version(prospective.public)
+            # Split the spec out by dots, and pretend that there is an implicit
+            # dot in between a release segment and a pre-release segment.
+            spec = _version_split(spec[:-2])  # Remove the trailing .*
+
+            # Split the prospective version out by dots, and pretend that there
+            # is an implicit dot in between a release segment and a pre-release
+            # segment.
+            prospective = _version_split(str(prospective))
+
+            # Shorten the prospective version to be the same length as the spec
+            # so that we can determine if the specifier is a prefix of the
+            # prospective version or not.
+            prospective = prospective[:len(spec)]
+
+            # Pad out our two sides with zeros so that they both equal the same
+            # length.
+            spec, prospective = _pad_version(spec, prospective)
+        else:
+            # Convert our spec string into a Version
+            spec = Version(spec)
+
+            # If the specifier does not have a local segment, then we want to
+            # act as if the prospective version also does not have a local
+            # segment.
+            if not spec.local:
+                prospective = Version(prospective.public)
+
+        return prospective == spec
+
+    @_require_version_compare
+    def _compare_not_equal(self, prospective, spec):
+        return not self._compare_equal(prospective, spec)
+
+    @_require_version_compare
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= Version(spec)
+
+    @_require_version_compare
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= Version(spec)
+
+    @_require_version_compare
+    def _compare_less_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is less than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective < spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a pre-release version, that we do not accept pre-release
+        # versions for the version mentioned in the specifier (e.g. <3.1 should
+        # not match 3.1.dev0, but should match 3.0.dev0).
+        if not spec.is_prerelease and prospective.is_prerelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # less than the spec version *and* it's not a pre-release of the same
+        # version in the spec.
+        return True
+
+    @_require_version_compare
+    def _compare_greater_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is greater than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective > spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a post-release version, that we do not accept
+        # post-release versions for the version mentioned in the specifier
+        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
+        if not spec.is_postrelease and prospective.is_postrelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # Ensure that we do not allow a local version of the version mentioned
+        # in the specifier, which is techincally greater than, to match.
+        if prospective.local is not None:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # greater than the spec version *and* it's not a pre-release of the
+        # same version in the spec.
+        return True
+
+    def _compare_arbitrary(self, prospective, spec):
+        return str(prospective).lower() == str(spec).lower()
+
+    @property
+    def prereleases(self):
+        # If there is an explicit prereleases set for this, then we'll just
+        # blindly use that.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # Look at all of our specifiers and determine if they are inclusive
+        # operators, and if they are if they are including an explicit
+        # prerelease.
+        operator, version = self._spec
+        if operator in ["==", ">=", "<=", "~=", "==="]:
+            # The == specifier can include a trailing .*, if it does we
+            # want to remove before parsing.
+            if operator == "==" and version.endswith(".*"):
+                version = version[:-2]
+
+            # Parse the version, and if it is a pre-release than this
+            # specifier allows pre-releases.
+            if parse(version).is_prerelease:
+                return True
+
+        return False
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+
+_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
+
+
+def _version_split(version):
+    result = []
+    for item in version.split("."):
+        match = _prefix_regex.search(item)
+        if match:
+            result.extend(match.groups())
+        else:
+            result.append(item)
+    return result
+
+
+def _pad_version(left, right):
+    left_split, right_split = [], []
+
+    # Get the release segment of our versions
+    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
+    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
+
+    # Get the rest of our versions
+    left_split.append(left[len(left_split[0]):])
+    right_split.append(right[len(right_split[0]):])
+
+    # Insert our padding
+    left_split.insert(
+        1,
+        ["0"] * max(0, len(right_split[0]) - len(left_split[0])),
+    )
+    right_split.insert(
+        1,
+        ["0"] * max(0, len(left_split[0]) - len(right_split[0])),
+    )
+
+    return (
+        list(itertools.chain(*left_split)),
+        list(itertools.chain(*right_split)),
+    )
+
+
+class SpecifierSet(BaseSpecifier):
+
+    def __init__(self, specifiers="", prereleases=None):
+        # Split on , to break each indidivual specifier into it's own item, and
+        # strip each item to remove leading/trailing whitespace.
+        specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
+
+        # Parsed each individual specifier, attempting first to make it a
+        # Specifier and falling back to a LegacySpecifier.
+        parsed = set()
+        for specifier in specifiers:
+            try:
+                parsed.add(Specifier(specifier))
+            except InvalidSpecifier:
+                parsed.add(LegacySpecifier(specifier))
+
+        # Turn our parsed specifiers into a frozen set and save them for later.
+        self._specs = frozenset(parsed)
+
+        # Store our prereleases value so we can use it later to determine if
+        # we accept prereleases or not.
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+
+    def __str__(self):
+        return ",".join(sorted(str(s) for s in self._specs))
+
+    def __hash__(self):
+        return hash(self._specs)
+
+    def __and__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        specifier = SpecifierSet()
+        specifier._specs = frozenset(self._specs | other._specs)
+
+        if self._prereleases is None and other._prereleases is not None:
+            specifier._prereleases = other._prereleases
+        elif self._prereleases is not None and other._prereleases is None:
+            specifier._prereleases = self._prereleases
+        elif self._prereleases == other._prereleases:
+            specifier._prereleases = self._prereleases
+        else:
+            raise ValueError(
+                "Cannot combine SpecifierSets with True and False prerelease "
+                "overrides."
+            )
+
+        return specifier
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs == other._specs
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs != other._specs
+
+    def __len__(self):
+        return len(self._specs)
+
+    def __iter__(self):
+        return iter(self._specs)
+
+    @property
+    def prereleases(self):
+        # If we have been given an explicit prerelease modifier, then we'll
+        # pass that through here.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # If we don't have any specifiers, and we don't have a forced value,
+        # then we'll just return None since we don't know if this should have
+        # pre-releases or not.
+        if not self._specs:
+            return None
+
+        # Otherwise we'll see if any of the given specifiers accept
+        # prereleases, if any of them do we'll return True, otherwise False.
+        return any(s.prereleases for s in self._specs)
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Ensure that our item is a Version or LegacyVersion instance.
+        if not isinstance(item, (LegacyVersion, Version)):
+            item = parse(item)
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # We can determine if we're going to allow pre-releases by looking to
+        # see if any of the underlying items supports them. If none of them do
+        # and this item is a pre-release then we do not allow it and we can
+        # short circuit that here.
+        # Note: This means that 1.0.dev1 would not be contained in something
+        #       like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
+        if not prereleases and item.is_prerelease:
+            return False
+
+        # We simply dispatch to the underlying specs here to make sure that the
+        # given version is contained within all of them.
+        # Note: This use of all() here means that an empty set of specifiers
+        #       will always return True, this is an explicit design decision.
+        return all(
+            s.contains(item, prereleases=prereleases)
+            for s in self._specs
+        )
+
+    def filter(self, iterable, prereleases=None):
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # If we have any specifiers, then we want to wrap our iterable in the
+        # filter method for each one, this will act as a logical AND amongst
+        # each specifier.
+        if self._specs:
+            for spec in self._specs:
+                iterable = spec.filter(iterable, prereleases=bool(prereleases))
+            return iterable
+        # If we do not have any specifiers, then we need to have a rough filter
+        # which will filter out any pre-releases, unless there are no final
+        # releases, and which will filter out LegacyVersion in general.
+        else:
+            filtered = []
+            found_prereleases = []
+
+            for item in iterable:
+                # Ensure that we some kind of Version class for this item.
+                if not isinstance(item, (LegacyVersion, Version)):
+                    parsed_version = parse(item)
+                else:
+                    parsed_version = item
+
+                # Filter out any item which is parsed as a LegacyVersion
+                if isinstance(parsed_version, LegacyVersion):
+                    continue
+
+                # Store any item which is a pre-release for later unless we've
+                # already found a final version or we are accepting prereleases
+                if parsed_version.is_prerelease and not prereleases:
+                    if not filtered:
+                        found_prereleases.append(item)
+                else:
+                    filtered.append(item)
+
+            # If we've found no items except for pre-releases, then we'll go
+            # ahead and use the pre-releases
+            if not filtered and found_prereleases and prereleases is None:
+                return found_prereleases
+
+            return filtered
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/utils.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/utils.py
new file mode 100644
index 0000000..942387c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/utils.py
@@ -0,0 +1,14 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import re
+
+
+_canonicalize_regex = re.compile(r"[-_.]+")
+
+
+def canonicalize_name(name):
+    # This is taken from PEP 503.
+    return _canonicalize_regex.sub("-", name).lower()
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/version.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/version.py
new file mode 100644
index 0000000..83b5ee8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/packaging/version.py
@@ -0,0 +1,393 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import collections
+import itertools
+import re
+
+from ._structures import Infinity
+
+
+__all__ = [
+    "parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"
+]
+
+
+_Version = collections.namedtuple(
+    "_Version",
+    ["epoch", "release", "dev", "pre", "post", "local"],
+)
+
+
+def parse(version):
+    """
+    Parse the given version string and return either a :class:`Version` object
+    or a :class:`LegacyVersion` object depending on if the given version is
+    a valid PEP 440 version or a legacy version.
+    """
+    try:
+        return Version(version)
+    except InvalidVersion:
+        return LegacyVersion(version)
+
+
+class InvalidVersion(ValueError):
+    """
+    An invalid version was found, users should refer to PEP 440.
+    """
+
+
+class _BaseVersion(object):
+
+    def __hash__(self):
+        return hash(self._key)
+
+    def __lt__(self, other):
+        return self._compare(other, lambda s, o: s < o)
+
+    def __le__(self, other):
+        return self._compare(other, lambda s, o: s <= o)
+
+    def __eq__(self, other):
+        return self._compare(other, lambda s, o: s == o)
+
+    def __ge__(self, other):
+        return self._compare(other, lambda s, o: s >= o)
+
+    def __gt__(self, other):
+        return self._compare(other, lambda s, o: s > o)
+
+    def __ne__(self, other):
+        return self._compare(other, lambda s, o: s != o)
+
+    def _compare(self, other, method):
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return method(self._key, other._key)
+
+
+class LegacyVersion(_BaseVersion):
+
+    def __init__(self, version):
+        self._version = str(version)
+        self._key = _legacy_cmpkey(self._version)
+
+    def __str__(self):
+        return self._version
+
+    def __repr__(self):
+        return "<LegacyVersion({0})>".format(repr(str(self)))
+
+    @property
+    def public(self):
+        return self._version
+
+    @property
+    def base_version(self):
+        return self._version
+
+    @property
+    def local(self):
+        return None
+
+    @property
+    def is_prerelease(self):
+        return False
+
+    @property
+    def is_postrelease(self):
+        return False
+
+
+_legacy_version_component_re = re.compile(
+    r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE,
+)
+
+_legacy_version_replacement_map = {
+    "pre": "c", "preview": "c", "-": "final-", "rc": "c", "dev": "@",
+}
+
+
+def _parse_version_parts(s):
+    for part in _legacy_version_component_re.split(s):
+        part = _legacy_version_replacement_map.get(part, part)
+
+        if not part or part == ".":
+            continue
+
+        if part[:1] in "0123456789":
+            # pad for numeric comparison
+            yield part.zfill(8)
+        else:
+            yield "*" + part
+
+    # ensure that alpha/beta/candidate are before final
+    yield "*final"
+
+
+def _legacy_cmpkey(version):
+    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
+    # greater than or equal to 0. This will effectively put the LegacyVersion,
+    # which uses the defacto standard originally implemented by setuptools,
+    # as before all PEP 440 versions.
+    epoch = -1
+
+    # This scheme is taken from pkg_resources.parse_version setuptools prior to
+    # it's adoption of the packaging library.
+    parts = []
+    for part in _parse_version_parts(version.lower()):
+        if part.startswith("*"):
+            # remove "-" before a prerelease tag
+            if part < "*final":
+                while parts and parts[-1] == "*final-":
+                    parts.pop()
+
+            # remove trailing zeros from each series of numeric parts
+            while parts and parts[-1] == "00000000":
+                parts.pop()
+
+        parts.append(part)
+    parts = tuple(parts)
+
+    return epoch, parts
+
+# Deliberately not anchored to the start and end of the string, to make it
+# easier for 3rd party code to reuse
+VERSION_PATTERN = r"""
+    v?
+    (?:
+        (?:(?P<epoch>[0-9]+)!)?                           # epoch
+        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
+        (?P<pre>                                          # pre-release
+            [-_\.]?
+            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
+            [-_\.]?
+            (?P<pre_n>[0-9]+)?
+        )?
+        (?P<post>                                         # post release
+            (?:-(?P<post_n1>[0-9]+))
+            |
+            (?:
+                [-_\.]?
+                (?P<post_l>post|rev|r)
+                [-_\.]?
+                (?P<post_n2>[0-9]+)?
+            )
+        )?
+        (?P<dev>                                          # dev release
+            [-_\.]?
+            (?P<dev_l>dev)
+            [-_\.]?
+            (?P<dev_n>[0-9]+)?
+        )?
+    )
+    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
+"""
+
+
+class Version(_BaseVersion):
+
+    _regex = re.compile(
+        r"^\s*" + VERSION_PATTERN + r"\s*$",
+        re.VERBOSE | re.IGNORECASE,
+    )
+
+    def __init__(self, version):
+        # Validate the version and parse it into pieces
+        match = self._regex.search(version)
+        if not match:
+            raise InvalidVersion("Invalid version: '{0}'".format(version))
+
+        # Store the parsed out pieces of the version
+        self._version = _Version(
+            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
+            release=tuple(int(i) for i in match.group("release").split(".")),
+            pre=_parse_letter_version(
+                match.group("pre_l"),
+                match.group("pre_n"),
+            ),
+            post=_parse_letter_version(
+                match.group("post_l"),
+                match.group("post_n1") or match.group("post_n2"),
+            ),
+            dev=_parse_letter_version(
+                match.group("dev_l"),
+                match.group("dev_n"),
+            ),
+            local=_parse_local_version(match.group("local")),
+        )
+
+        # Generate a key which will be used for sorting
+        self._key = _cmpkey(
+            self._version.epoch,
+            self._version.release,
+            self._version.pre,
+            self._version.post,
+            self._version.dev,
+            self._version.local,
+        )
+
+    def __repr__(self):
+        return "<Version({0})>".format(repr(str(self)))
+
+    def __str__(self):
+        parts = []
+
+        # Epoch
+        if self._version.epoch != 0:
+            parts.append("{0}!".format(self._version.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self._version.release))
+
+        # Pre-release
+        if self._version.pre is not None:
+            parts.append("".join(str(x) for x in self._version.pre))
+
+        # Post-release
+        if self._version.post is not None:
+            parts.append(".post{0}".format(self._version.post[1]))
+
+        # Development release
+        if self._version.dev is not None:
+            parts.append(".dev{0}".format(self._version.dev[1]))
+
+        # Local version segment
+        if self._version.local is not None:
+            parts.append(
+                "+{0}".format(".".join(str(x) for x in self._version.local))
+            )
+
+        return "".join(parts)
+
+    @property
+    def public(self):
+        return str(self).split("+", 1)[0]
+
+    @property
+    def base_version(self):
+        parts = []
+
+        # Epoch
+        if self._version.epoch != 0:
+            parts.append("{0}!".format(self._version.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self._version.release))
+
+        return "".join(parts)
+
+    @property
+    def local(self):
+        version_string = str(self)
+        if "+" in version_string:
+            return version_string.split("+", 1)[1]
+
+    @property
+    def is_prerelease(self):
+        return bool(self._version.dev or self._version.pre)
+
+    @property
+    def is_postrelease(self):
+        return bool(self._version.post)
+
+
+def _parse_letter_version(letter, number):
+    if letter:
+        # We consider there to be an implicit 0 in a pre-release if there is
+        # not a numeral associated with it.
+        if number is None:
+            number = 0
+
+        # We normalize any letters to their lower case form
+        letter = letter.lower()
+
+        # We consider some words to be alternate spellings of other words and
+        # in those cases we want to normalize the spellings to our preferred
+        # spelling.
+        if letter == "alpha":
+            letter = "a"
+        elif letter == "beta":
+            letter = "b"
+        elif letter in ["c", "pre", "preview"]:
+            letter = "rc"
+        elif letter in ["rev", "r"]:
+            letter = "post"
+
+        return letter, int(number)
+    if not letter and number:
+        # We assume if we are given a number, but we are not given a letter
+        # then this is using the implicit post release syntax (e.g. 1.0-1)
+        letter = "post"
+
+        return letter, int(number)
+
+
+_local_version_seperators = re.compile(r"[\._-]")
+
+
+def _parse_local_version(local):
+    """
+    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
+    """
+    if local is not None:
+        return tuple(
+            part.lower() if not part.isdigit() else int(part)
+            for part in _local_version_seperators.split(local)
+        )
+
+
+def _cmpkey(epoch, release, pre, post, dev, local):
+    # When we compare a release version, we want to compare it with all of the
+    # trailing zeros removed. So we'll use a reverse the list, drop all the now
+    # leading zeros until we come to something non zero, then take the rest
+    # re-reverse it back into the correct order and make it a tuple and use
+    # that for our sorting key.
+    release = tuple(
+        reversed(list(
+            itertools.dropwhile(
+                lambda x: x == 0,
+                reversed(release),
+            )
+        ))
+    )
+
+    # We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
+    # We'll do this by abusing the pre segment, but we _only_ want to do this
+    # if there is not a pre or a post segment. If we have one of those then
+    # the normal sorting rules will handle this case correctly.
+    if pre is None and post is None and dev is not None:
+        pre = -Infinity
+    # Versions without a pre-release (except as noted above) should sort after
+    # those with one.
+    elif pre is None:
+        pre = Infinity
+
+    # Versions without a post segment should sort before those with one.
+    if post is None:
+        post = -Infinity
+
+    # Versions without a development segment should sort after those with one.
+    if dev is None:
+        dev = Infinity
+
+    if local is None:
+        # Versions without a local segment should sort before those with one.
+        local = -Infinity
+    else:
+        # Versions with a local segment need that segment parsed to implement
+        # the sorting rules in PEP440.
+        # - Alpha numeric segments sort before numeric segments
+        # - Alpha numeric segments sort lexicographically
+        # - Numeric segments sort numerically
+        # - Shorter versions sort before longer versions when the prefixes
+        #   match exactly
+        local = tuple(
+            (i, "") if isinstance(i, int) else (-Infinity, i)
+            for i in local
+        )
+
+    return epoch, release, pre, post, dev, local
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/pyparsing.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/pyparsing.py
new file mode 100644
index 0000000..cf75e1e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/pyparsing.py
@@ -0,0 +1,5742 @@
+# module pyparsing.py
+#
+# Copyright (c) 2003-2018  Paul T. McGuire
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__doc__ = \
+"""
+pyparsing module - Classes and methods to define and execute parsing grammars
+=============================================================================
+
+The pyparsing module is an alternative approach to creating and executing simple grammars,
+vs. the traditional lex/yacc approach, or the use of regular expressions.  With pyparsing, you
+don't need to learn a new syntax for defining grammars or matching expressions - the parsing module
+provides a library of classes that you use to construct the grammar directly in Python.
+
+Here is a program to parse "Hello, World!" (or any greeting of the form 
+C{"<salutation>, <addressee>!"}), built up using L{Word}, L{Literal}, and L{And} elements 
+(L{'+'<ParserElement.__add__>} operator gives L{And} expressions, strings are auto-converted to
+L{Literal} expressions)::
+
+    from pyparsing import Word, alphas
+
+    # define grammar of a greeting
+    greet = Word(alphas) + "," + Word(alphas) + "!"
+
+    hello = "Hello, World!"
+    print (hello, "->", greet.parseString(hello))
+
+The program outputs the following::
+
+    Hello, World! -> ['Hello', ',', 'World', '!']
+
+The Python representation of the grammar is quite readable, owing to the self-explanatory
+class names, and the use of '+', '|' and '^' operators.
+
+The L{ParseResults} object returned from L{ParserElement.parseString<ParserElement.parseString>} can be accessed as a nested list, a dictionary, or an
+object with named attributes.
+
+The pyparsing module handles some of the problems that are typically vexing when writing text parsers:
+ - extra or missing whitespace (the above program will also handle "Hello,World!", "Hello  ,  World  !", etc.)
+ - quoted strings
+ - embedded comments
+
+
+Getting Started -
+-----------------
+Visit the classes L{ParserElement} and L{ParseResults} to see the base classes that most other pyparsing
+classes inherit from. Use the docstrings for examples of how to:
+ - construct literal match expressions from L{Literal} and L{CaselessLiteral} classes
+ - construct character word-group expressions using the L{Word} class
+ - see how to create repetitive expressions using L{ZeroOrMore} and L{OneOrMore} classes
+ - use L{'+'<And>}, L{'|'<MatchFirst>}, L{'^'<Or>}, and L{'&'<Each>} operators to combine simple expressions into more complex ones
+ - associate names with your parsed results using L{ParserElement.setResultsName}
+ - find some helpful expression short-cuts like L{delimitedList} and L{oneOf}
+ - find more useful common expressions in the L{pyparsing_common} namespace class
+"""
+
+__version__ = "2.2.1"
+__versionTime__ = "18 Sep 2018 00:49 UTC"
+__author__ = "Paul McGuire <ptmcg@users.sourceforge.net>"
+
+import string
+from weakref import ref as wkref
+import copy
+import sys
+import warnings
+import re
+import sre_constants
+import collections
+import pprint
+import traceback
+import types
+from datetime import datetime
+
+try:
+    from _thread import RLock
+except ImportError:
+    from threading import RLock
+
+try:
+    # Python 3
+    from collections.abc import Iterable
+    from collections.abc import MutableMapping
+except ImportError:
+    # Python 2.7
+    from collections import Iterable
+    from collections import MutableMapping
+
+try:
+    from collections import OrderedDict as _OrderedDict
+except ImportError:
+    try:
+        from ordereddict import OrderedDict as _OrderedDict
+    except ImportError:
+        _OrderedDict = None
+
+#~ sys.stderr.write( "testing pyparsing module, version %s, %s\n" % (__version__,__versionTime__ ) )
+
+__all__ = [
+'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty',
+'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal',
+'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or',
+'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException',
+'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException',
+'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter', 
+'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore',
+'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col',
+'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString',
+'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums',
+'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno',
+'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral',
+'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables',
+'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity', 
+'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd',
+'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute',
+'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation','locatedExpr', 'withClass',
+'CloseMatch', 'tokenMap', 'pyparsing_common',
+]
+
+system_version = tuple(sys.version_info)[:3]
+PY_3 = system_version[0] == 3
+if PY_3:
+    _MAX_INT = sys.maxsize
+    basestring = str
+    unichr = chr
+    _ustr = str
+
+    # build list of single arg builtins, that can be used as parse actions
+    singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max]
+
+else:
+    _MAX_INT = sys.maxint
+    range = xrange
+
+    def _ustr(obj):
+        """Drop-in replacement for str(obj) that tries to be Unicode friendly. It first tries
+           str(obj). If that fails with a UnicodeEncodeError, then it tries unicode(obj). It
+           then < returns the unicode object | encodes it with the default encoding | ... >.
+        """
+        if isinstance(obj,unicode):
+            return obj
+
+        try:
+            # If this works, then _ustr(obj) has the same behaviour as str(obj), so
+            # it won't break any existing code.
+            return str(obj)
+
+        except UnicodeEncodeError:
+            # Else encode it
+            ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace')
+            xmlcharref = Regex(r'&#\d+;')
+            xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:])
+            return xmlcharref.transformString(ret)
+
+    # build list of single arg builtins, tolerant of Python version, that can be used as parse actions
+    singleArgBuiltins = []
+    import __builtin__
+    for fname in "sum len sorted reversed list tuple set any all min max".split():
+        try:
+            singleArgBuiltins.append(getattr(__builtin__,fname))
+        except AttributeError:
+            continue
+            
+_generatorType = type((y for y in range(1)))
+ 
+def _xml_escape(data):
+    """Escape &, <, >, ", ', etc. in a string of data."""
+
+    # ampersand must be replaced first
+    from_symbols = '&><"\''
+    to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split())
+    for from_,to_ in zip(from_symbols, to_symbols):
+        data = data.replace(from_, to_)
+    return data
+
+class _Constants(object):
+    pass
+
+alphas     = string.ascii_uppercase + string.ascii_lowercase
+nums       = "0123456789"
+hexnums    = nums + "ABCDEFabcdef"
+alphanums  = alphas + nums
+_bslash    = chr(92)
+printables = "".join(c for c in string.printable if c not in string.whitespace)
+
+class ParseBaseException(Exception):
+    """base exception class for all parsing runtime exceptions"""
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__( self, pstr, loc=0, msg=None, elem=None ):
+        self.loc = loc
+        if msg is None:
+            self.msg = pstr
+            self.pstr = ""
+        else:
+            self.msg = msg
+            self.pstr = pstr
+        self.parserElement = elem
+        self.args = (pstr, loc, msg)
+
+    @classmethod
+    def _from_exception(cls, pe):
+        """
+        internal factory method to simplify creating one type of ParseException 
+        from another - avoids having __init__ signature conflicts among subclasses
+        """
+        return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement)
+
+    def __getattr__( self, aname ):
+        """supported attributes by name are:
+            - lineno - returns the line number of the exception text
+            - col - returns the column number of the exception text
+            - line - returns the line containing the exception text
+        """
+        if( aname == "lineno" ):
+            return lineno( self.loc, self.pstr )
+        elif( aname in ("col", "column") ):
+            return col( self.loc, self.pstr )
+        elif( aname == "line" ):
+            return line( self.loc, self.pstr )
+        else:
+            raise AttributeError(aname)
+
+    def __str__( self ):
+        return "%s (at char %d), (line:%d, col:%d)" % \
+                ( self.msg, self.loc, self.lineno, self.column )
+    def __repr__( self ):
+        return _ustr(self)
+    def markInputline( self, markerString = ">!<" ):
+        """Extracts the exception line from the input string, and marks
+           the location of the exception with a special symbol.
+        """
+        line_str = self.line
+        line_column = self.column - 1
+        if markerString:
+            line_str = "".join((line_str[:line_column],
+                                markerString, line_str[line_column:]))
+        return line_str.strip()
+    def __dir__(self):
+        return "lineno col line".split() + dir(type(self))
+
+class ParseException(ParseBaseException):
+    """
+    Exception thrown when parse expressions don't match class;
+    supported attributes by name are:
+     - lineno - returns the line number of the exception text
+     - col - returns the column number of the exception text
+     - line - returns the line containing the exception text
+        
+    Example::
+        try:
+            Word(nums).setName("integer").parseString("ABC")
+        except ParseException as pe:
+            print(pe)
+            print("column: {}".format(pe.col))
+            
+    prints::
+       Expected integer (at char 0), (line:1, col:1)
+        column: 1
+    """
+    pass
+
+class ParseFatalException(ParseBaseException):
+    """user-throwable exception thrown when inconsistent parse content
+       is found; stops all parsing immediately"""
+    pass
+
+class ParseSyntaxException(ParseFatalException):
+    """just like L{ParseFatalException}, but thrown internally when an
+       L{ErrorStop<And._ErrorStop>} ('-' operator) indicates that parsing is to stop 
+       immediately because an unbacktrackable syntax error has been found"""
+    pass
+
+#~ class ReparseException(ParseBaseException):
+    #~ """Experimental class - parse actions can raise this exception to cause
+       #~ pyparsing to reparse the input string:
+        #~ - with a modified input string, and/or
+        #~ - with a modified start location
+       #~ Set the values of the ReparseException in the constructor, and raise the
+       #~ exception in a parse action to cause pyparsing to use the new string/location.
+       #~ Setting the values as None causes no change to be made.
+       #~ """
+    #~ def __init_( self, newstring, restartLoc ):
+        #~ self.newParseText = newstring
+        #~ self.reparseLoc = restartLoc
+
+class RecursiveGrammarException(Exception):
+    """exception thrown by L{ParserElement.validate} if the grammar could be improperly recursive"""
+    def __init__( self, parseElementList ):
+        self.parseElementTrace = parseElementList
+
+    def __str__( self ):
+        return "RecursiveGrammarException: %s" % self.parseElementTrace
+
+class _ParseResultsWithOffset(object):
+    def __init__(self,p1,p2):
+        self.tup = (p1,p2)
+    def __getitem__(self,i):
+        return self.tup[i]
+    def __repr__(self):
+        return repr(self.tup[0])
+    def setOffset(self,i):
+        self.tup = (self.tup[0],i)
+
+class ParseResults(object):
+    """
+    Structured parse results, to provide multiple means of access to the parsed data:
+       - as a list (C{len(results)})
+       - by list index (C{results[0], results[1]}, etc.)
+       - by attribute (C{results.<resultsName>} - see L{ParserElement.setResultsName})
+
+    Example::
+        integer = Word(nums)
+        date_str = (integer.setResultsName("year") + '/' 
+                        + integer.setResultsName("month") + '/' 
+                        + integer.setResultsName("day"))
+        # equivalent form:
+        # date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+        # parseString returns a ParseResults object
+        result = date_str.parseString("1999/12/31")
+
+        def test(s, fn=repr):
+            print("%s -> %s" % (s, fn(eval(s))))
+        test("list(result)")
+        test("result[0]")
+        test("result['month']")
+        test("result.day")
+        test("'month' in result")
+        test("'minutes' in result")
+        test("result.dump()", str)
+    prints::
+        list(result) -> ['1999', '/', '12', '/', '31']
+        result[0] -> '1999'
+        result['month'] -> '12'
+        result.day -> '31'
+        'month' in result -> True
+        'minutes' in result -> False
+        result.dump() -> ['1999', '/', '12', '/', '31']
+        - day: 31
+        - month: 12
+        - year: 1999
+    """
+    def __new__(cls, toklist=None, name=None, asList=True, modal=True ):
+        if isinstance(toklist, cls):
+            return toklist
+        retobj = object.__new__(cls)
+        retobj.__doinit = True
+        return retobj
+
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__( self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance ):
+        if self.__doinit:
+            self.__doinit = False
+            self.__name = None
+            self.__parent = None
+            self.__accumNames = {}
+            self.__asList = asList
+            self.__modal = modal
+            if toklist is None:
+                toklist = []
+            if isinstance(toklist, list):
+                self.__toklist = toklist[:]
+            elif isinstance(toklist, _generatorType):
+                self.__toklist = list(toklist)
+            else:
+                self.__toklist = [toklist]
+            self.__tokdict = dict()
+
+        if name is not None and name:
+            if not modal:
+                self.__accumNames[name] = 0
+            if isinstance(name,int):
+                name = _ustr(name) # will always return a str, but use _ustr for consistency
+            self.__name = name
+            if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None,'',[])):
+                if isinstance(toklist,basestring):
+                    toklist = [ toklist ]
+                if asList:
+                    if isinstance(toklist,ParseResults):
+                        self[name] = _ParseResultsWithOffset(toklist.copy(),0)
+                    else:
+                        self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]),0)
+                    self[name].__name = name
+                else:
+                    try:
+                        self[name] = toklist[0]
+                    except (KeyError,TypeError,IndexError):
+                        self[name] = toklist
+
+    def __getitem__( self, i ):
+        if isinstance( i, (int,slice) ):
+            return self.__toklist[i]
+        else:
+            if i not in self.__accumNames:
+                return self.__tokdict[i][-1][0]
+            else:
+                return ParseResults([ v[0] for v in self.__tokdict[i] ])
+
+    def __setitem__( self, k, v, isinstance=isinstance ):
+        if isinstance(v,_ParseResultsWithOffset):
+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [v]
+            sub = v[0]
+        elif isinstance(k,(int,slice)):
+            self.__toklist[k] = v
+            sub = v
+        else:
+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [_ParseResultsWithOffset(v,0)]
+            sub = v
+        if isinstance(sub,ParseResults):
+            sub.__parent = wkref(self)
+
+    def __delitem__( self, i ):
+        if isinstance(i,(int,slice)):
+            mylen = len( self.__toklist )
+            del self.__toklist[i]
+
+            # convert int to slice
+            if isinstance(i, int):
+                if i < 0:
+                    i += mylen
+                i = slice(i, i+1)
+            # get removed indices
+            removed = list(range(*i.indices(mylen)))
+            removed.reverse()
+            # fixup indices in token dictionary
+            for name,occurrences in self.__tokdict.items():
+                for j in removed:
+                    for k, (value, position) in enumerate(occurrences):
+                        occurrences[k] = _ParseResultsWithOffset(value, position - (position > j))
+        else:
+            del self.__tokdict[i]
+
+    def __contains__( self, k ):
+        return k in self.__tokdict
+
+    def __len__( self ): return len( self.__toklist )
+    def __bool__(self): return ( not not self.__toklist )
+    __nonzero__ = __bool__
+    def __iter__( self ): return iter( self.__toklist )
+    def __reversed__( self ): return iter( self.__toklist[::-1] )
+    def _iterkeys( self ):
+        if hasattr(self.__tokdict, "iterkeys"):
+            return self.__tokdict.iterkeys()
+        else:
+            return iter(self.__tokdict)
+
+    def _itervalues( self ):
+        return (self[k] for k in self._iterkeys())
+            
+    def _iteritems( self ):
+        return ((k, self[k]) for k in self._iterkeys())
+
+    if PY_3:
+        keys = _iterkeys       
+        """Returns an iterator of all named result keys (Python 3.x only)."""
+
+        values = _itervalues
+        """Returns an iterator of all named result values (Python 3.x only)."""
+
+        items = _iteritems
+        """Returns an iterator of all named result key-value tuples (Python 3.x only)."""
+
+    else:
+        iterkeys = _iterkeys
+        """Returns an iterator of all named result keys (Python 2.x only)."""
+
+        itervalues = _itervalues
+        """Returns an iterator of all named result values (Python 2.x only)."""
+
+        iteritems = _iteritems
+        """Returns an iterator of all named result key-value tuples (Python 2.x only)."""
+
+        def keys( self ):
+            """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iterkeys())
+
+        def values( self ):
+            """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.itervalues())
+                
+        def items( self ):
+            """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iteritems())
+
+    def haskeys( self ):
+        """Since keys() returns an iterator, this method is helpful in bypassing
+           code that looks for the existence of any defined results names."""
+        return bool(self.__tokdict)
+        
+    def pop( self, *args, **kwargs):
+        """
+        Removes and returns item at specified index (default=C{last}).
+        Supports both C{list} and C{dict} semantics for C{pop()}. If passed no
+        argument or an integer argument, it will use C{list} semantics
+        and pop tokens from the list of parsed tokens. If passed a 
+        non-integer argument (most likely a string), it will use C{dict}
+        semantics and pop the corresponding value from any defined 
+        results names. A second default return value argument is 
+        supported, just as in C{dict.pop()}.
+
+        Example::
+            def remove_first(tokens):
+                tokens.pop(0)
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+            print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321']
+
+            label = Word(alphas)
+            patt = label("LABEL") + OneOrMore(Word(nums))
+            print(patt.parseString("AAB 123 321").dump())
+
+            # Use pop() in a parse action to remove named result (note that corresponding value is not
+            # removed from list form of results)
+            def remove_LABEL(tokens):
+                tokens.pop("LABEL")
+                return tokens
+            patt.addParseAction(remove_LABEL)
+            print(patt.parseString("AAB 123 321").dump())
+        prints::
+            ['AAB', '123', '321']
+            - LABEL: AAB
+
+            ['AAB', '123', '321']
+        """
+        if not args:
+            args = [-1]
+        for k,v in kwargs.items():
+            if k == 'default':
+                args = (args[0], v)
+            else:
+                raise TypeError("pop() got an unexpected keyword argument '%s'" % k)
+        if (isinstance(args[0], int) or 
+                        len(args) == 1 or 
+                        args[0] in self):
+            index = args[0]
+            ret = self[index]
+            del self[index]
+            return ret
+        else:
+            defaultvalue = args[1]
+            return defaultvalue
+
+    def get(self, key, defaultValue=None):
+        """
+        Returns named result matching the given key, or if there is no
+        such name, then returns the given C{defaultValue} or C{None} if no
+        C{defaultValue} is specified.
+
+        Similar to C{dict.get()}.
+        
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            result = date_str.parseString("1999/12/31")
+            print(result.get("year")) # -> '1999'
+            print(result.get("hour", "not specified")) # -> 'not specified'
+            print(result.get("hour")) # -> None
+        """
+        if key in self:
+            return self[key]
+        else:
+            return defaultValue
+
+    def insert( self, index, insStr ):
+        """
+        Inserts new element at location index in the list of parsed tokens.
+        
+        Similar to C{list.insert()}.
+
+        Example::
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+
+            # use a parse action to insert the parse location in the front of the parsed results
+            def insert_locn(locn, tokens):
+                tokens.insert(0, locn)
+            print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321']
+        """
+        self.__toklist.insert(index, insStr)
+        # fixup indices in token dictionary
+        for name,occurrences in self.__tokdict.items():
+            for k, (value, position) in enumerate(occurrences):
+                occurrences[k] = _ParseResultsWithOffset(value, position + (position > index))
+
+    def append( self, item ):
+        """
+        Add single element to end of ParseResults list of elements.
+
+        Example::
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+            
+            # use a parse action to compute the sum of the parsed integers, and add it to the end
+            def append_sum(tokens):
+                tokens.append(sum(map(int, tokens)))
+            print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444]
+        """
+        self.__toklist.append(item)
+
+    def extend( self, itemseq ):
+        """
+        Add sequence of elements to end of ParseResults list of elements.
+
+        Example::
+            patt = OneOrMore(Word(alphas))
+            
+            # use a parse action to append the reverse of the matched strings, to make a palindrome
+            def make_palindrome(tokens):
+                tokens.extend(reversed([t[::-1] for t in tokens]))
+                return ''.join(tokens)
+            print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'
+        """
+        if isinstance(itemseq, ParseResults):
+            self += itemseq
+        else:
+            self.__toklist.extend(itemseq)
+
+    def clear( self ):
+        """
+        Clear all elements and results names.
+        """
+        del self.__toklist[:]
+        self.__tokdict.clear()
+
+    def __getattr__( self, name ):
+        try:
+            return self[name]
+        except KeyError:
+            return ""
+            
+        if name in self.__tokdict:
+            if name not in self.__accumNames:
+                return self.__tokdict[name][-1][0]
+            else:
+                return ParseResults([ v[0] for v in self.__tokdict[name] ])
+        else:
+            return ""
+
+    def __add__( self, other ):
+        ret = self.copy()
+        ret += other
+        return ret
+
+    def __iadd__( self, other ):
+        if other.__tokdict:
+            offset = len(self.__toklist)
+            addoffset = lambda a: offset if a<0 else a+offset
+            otheritems = other.__tokdict.items()
+            otherdictitems = [(k, _ParseResultsWithOffset(v[0],addoffset(v[1])) )
+                                for (k,vlist) in otheritems for v in vlist]
+            for k,v in otherdictitems:
+                self[k] = v
+                if isinstance(v[0],ParseResults):
+                    v[0].__parent = wkref(self)
+            
+        self.__toklist += other.__toklist
+        self.__accumNames.update( other.__accumNames )
+        return self
+
+    def __radd__(self, other):
+        if isinstance(other,int) and other == 0:
+            # useful for merging many ParseResults using sum() builtin
+            return self.copy()
+        else:
+            # this may raise a TypeError - so be it
+            return other + self
+        
+    def __repr__( self ):
+        return "(%s, %s)" % ( repr( self.__toklist ), repr( self.__tokdict ) )
+
+    def __str__( self ):
+        return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']'
+
+    def _asStringList( self, sep='' ):
+        out = []
+        for item in self.__toklist:
+            if out and sep:
+                out.append(sep)
+            if isinstance( item, ParseResults ):
+                out += item._asStringList()
+            else:
+                out.append( _ustr(item) )
+        return out
+
+    def asList( self ):
+        """
+        Returns the parse results as a nested list of matching tokens, all converted to strings.
+
+        Example::
+            patt = OneOrMore(Word(alphas))
+            result = patt.parseString("sldkj lsdkj sldkj")
+            # even though the result prints in string-like form, it is actually a pyparsing ParseResults
+            print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']
+            
+            # Use asList() to create an actual list
+            result_list = result.asList()
+            print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']
+        """
+        return [res.asList() if isinstance(res,ParseResults) else res for res in self.__toklist]
+
+    def asDict( self ):
+        """
+        Returns the named parse results as a nested dictionary.
+
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+            
+            result = date_str.parseString('12/31/1999')
+            print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})
+            
+            result_dict = result.asDict()
+            print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}
+
+            # even though a ParseResults supports dict-like access, sometime you just need to have a dict
+            import json
+            print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable
+            print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"}
+        """
+        if PY_3:
+            item_fn = self.items
+        else:
+            item_fn = self.iteritems
+            
+        def toItem(obj):
+            if isinstance(obj, ParseResults):
+                if obj.haskeys():
+                    return obj.asDict()
+                else:
+                    return [toItem(v) for v in obj]
+            else:
+                return obj
+                
+        return dict((k,toItem(v)) for k,v in item_fn())
+
+    def copy( self ):
+        """
+        Returns a new copy of a C{ParseResults} object.
+        """
+        ret = ParseResults( self.__toklist )
+        ret.__tokdict = self.__tokdict.copy()
+        ret.__parent = self.__parent
+        ret.__accumNames.update( self.__accumNames )
+        ret.__name = self.__name
+        return ret
+
+    def asXML( self, doctag=None, namedItemsOnly=False, indent="", formatted=True ):
+        """
+        (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names.
+        """
+        nl = "\n"
+        out = []
+        namedItems = dict((v[1],k) for (k,vlist) in self.__tokdict.items()
+                                                            for v in vlist)
+        nextLevelIndent = indent + "  "
+
+        # collapse out indents if formatting is not desired
+        if not formatted:
+            indent = ""
+            nextLevelIndent = ""
+            nl = ""
+
+        selfTag = None
+        if doctag is not None:
+            selfTag = doctag
+        else:
+            if self.__name:
+                selfTag = self.__name
+
+        if not selfTag:
+            if namedItemsOnly:
+                return ""
+            else:
+                selfTag = "ITEM"
+
+        out += [ nl, indent, "<", selfTag, ">" ]
+
+        for i,res in enumerate(self.__toklist):
+            if isinstance(res,ParseResults):
+                if i in namedItems:
+                    out += [ res.asXML(namedItems[i],
+                                        namedItemsOnly and doctag is None,
+                                        nextLevelIndent,
+                                        formatted)]
+                else:
+                    out += [ res.asXML(None,
+                                        namedItemsOnly and doctag is None,
+                                        nextLevelIndent,
+                                        formatted)]
+            else:
+                # individual token, see if there is a name for it
+                resTag = None
+                if i in namedItems:
+                    resTag = namedItems[i]
+                if not resTag:
+                    if namedItemsOnly:
+                        continue
+                    else:
+                        resTag = "ITEM"
+                xmlBodyText = _xml_escape(_ustr(res))
+                out += [ nl, nextLevelIndent, "<", resTag, ">",
+                                                xmlBodyText,
+                                                "</", resTag, ">" ]
+
+        out += [ nl, indent, "</", selfTag, ">" ]
+        return "".join(out)
+
+    def __lookup(self,sub):
+        for k,vlist in self.__tokdict.items():
+            for v,loc in vlist:
+                if sub is v:
+                    return k
+        return None
+
+    def getName(self):
+        r"""
+        Returns the results name for this token expression. Useful when several 
+        different expressions might match at a particular location.
+
+        Example::
+            integer = Word(nums)
+            ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
+            house_number_expr = Suppress('#') + Word(nums, alphanums)
+            user_data = (Group(house_number_expr)("house_number") 
+                        | Group(ssn_expr)("ssn")
+                        | Group(integer)("age"))
+            user_info = OneOrMore(user_data)
+            
+            result = user_info.parseString("22 111-22-3333 #221B")
+            for item in result:
+                print(item.getName(), ':', item[0])
+        prints::
+            age : 22
+            ssn : 111-22-3333
+            house_number : 221B
+        """
+        if self.__name:
+            return self.__name
+        elif self.__parent:
+            par = self.__parent()
+            if par:
+                return par.__lookup(self)
+            else:
+                return None
+        elif (len(self) == 1 and
+               len(self.__tokdict) == 1 and
+               next(iter(self.__tokdict.values()))[0][1] in (0,-1)):
+            return next(iter(self.__tokdict.keys()))
+        else:
+            return None
+
+    def dump(self, indent='', depth=0, full=True):
+        """
+        Diagnostic method for listing out the contents of a C{ParseResults}.
+        Accepts an optional C{indent} argument so that this string can be embedded
+        in a nested display of other data.
+
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+            
+            result = date_str.parseString('12/31/1999')
+            print(result.dump())
+        prints::
+            ['12', '/', '31', '/', '1999']
+            - day: 1999
+            - month: 31
+            - year: 12
+        """
+        out = []
+        NL = '\n'
+        out.append( indent+_ustr(self.asList()) )
+        if full:
+            if self.haskeys():
+                items = sorted((str(k), v) for k,v in self.items())
+                for k,v in items:
+                    if out:
+                        out.append(NL)
+                    out.append( "%s%s- %s: " % (indent,('  '*depth), k) )
+                    if isinstance(v,ParseResults):
+                        if v:
+                            out.append( v.dump(indent,depth+1) )
+                        else:
+                            out.append(_ustr(v))
+                    else:
+                        out.append(repr(v))
+            elif any(isinstance(vv,ParseResults) for vv in self):
+                v = self
+                for i,vv in enumerate(v):
+                    if isinstance(vv,ParseResults):
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),vv.dump(indent,depth+1) ))
+                    else:
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),_ustr(vv)))
+            
+        return "".join(out)
+
+    def pprint(self, *args, **kwargs):
+        """
+        Pretty-printer for parsed results as a list, using the C{pprint} module.
+        Accepts additional positional or keyword args as defined for the 
+        C{pprint.pprint} method. (U{http://docs.python.org/3/library/pprint.html#pprint.pprint})
+
+        Example::
+            ident = Word(alphas, alphanums)
+            num = Word(nums)
+            func = Forward()
+            term = ident | num | Group('(' + func + ')')
+            func <<= ident + Group(Optional(delimitedList(term)))
+            result = func.parseString("fna a,b,(fnb c,d,200),100")
+            result.pprint(width=40)
+        prints::
+            ['fna',
+             ['a',
+              'b',
+              ['(', 'fnb', ['c', 'd', '200'], ')'],
+              '100']]
+        """
+        pprint.pprint(self.asList(), *args, **kwargs)
+
+    # add support for pickle protocol
+    def __getstate__(self):
+        return ( self.__toklist,
+                 ( self.__tokdict.copy(),
+                   self.__parent is not None and self.__parent() or None,
+                   self.__accumNames,
+                   self.__name ) )
+
+    def __setstate__(self,state):
+        self.__toklist = state[0]
+        (self.__tokdict,
+         par,
+         inAccumNames,
+         self.__name) = state[1]
+        self.__accumNames = {}
+        self.__accumNames.update(inAccumNames)
+        if par is not None:
+            self.__parent = wkref(par)
+        else:
+            self.__parent = None
+
+    def __getnewargs__(self):
+        return self.__toklist, self.__name, self.__asList, self.__modal
+
+    def __dir__(self):
+        return (dir(type(self)) + list(self.keys()))
+
+MutableMapping.register(ParseResults)
+
+def col (loc,strg):
+    """Returns current column within a string, counting newlines as line separators.
+   The first column is number 1.
+
+   Note: the default parsing behavior is to expand tabs in the input string
+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information
+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+   consistent view of the parsed string, the parse location, and line and column
+   positions within the parsed string.
+   """
+    s = strg
+    return 1 if 0<loc<len(s) and s[loc-1] == '\n' else loc - s.rfind("\n", 0, loc)
+
+def lineno(loc,strg):
+    """Returns current line number within a string, counting newlines as line separators.
+   The first line is number 1.
+
+   Note: the default parsing behavior is to expand tabs in the input string
+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information
+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+   consistent view of the parsed string, the parse location, and line and column
+   positions within the parsed string.
+   """
+    return strg.count("\n",0,loc) + 1
+
+def line( loc, strg ):
+    """Returns the line of text containing loc within a string, counting newlines as line separators.
+       """
+    lastCR = strg.rfind("\n", 0, loc)
+    nextCR = strg.find("\n", loc)
+    if nextCR >= 0:
+        return strg[lastCR+1:nextCR]
+    else:
+        return strg[lastCR+1:]
+
+def _defaultStartDebugAction( instring, loc, expr ):
+    print (("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % ( lineno(loc,instring), col(loc,instring) )))
+
+def _defaultSuccessDebugAction( instring, startloc, endloc, expr, toks ):
+    print ("Matched " + _ustr(expr) + " -> " + str(toks.asList()))
+
+def _defaultExceptionDebugAction( instring, loc, expr, exc ):
+    print ("Exception raised:" + _ustr(exc))
+
+def nullDebugAction(*args):
+    """'Do-nothing' debug action, to suppress debugging output during parsing."""
+    pass
+
+# Only works on Python 3.x - nonlocal is toxic to Python 2 installs
+#~ 'decorator to trim function calls to match the arity of the target'
+#~ def _trim_arity(func, maxargs=3):
+    #~ if func in singleArgBuiltins:
+        #~ return lambda s,l,t: func(t)
+    #~ limit = 0
+    #~ foundArity = False
+    #~ def wrapper(*args):
+        #~ nonlocal limit,foundArity
+        #~ while 1:
+            #~ try:
+                #~ ret = func(*args[limit:])
+                #~ foundArity = True
+                #~ return ret
+            #~ except TypeError:
+                #~ if limit == maxargs or foundArity:
+                    #~ raise
+                #~ limit += 1
+                #~ continue
+    #~ return wrapper
+
+# this version is Python 2.x-3.x cross-compatible
+'decorator to trim function calls to match the arity of the target'
+def _trim_arity(func, maxargs=2):
+    if func in singleArgBuiltins:
+        return lambda s,l,t: func(t)
+    limit = [0]
+    foundArity = [False]
+    
+    # traceback return data structure changed in Py3.5 - normalize back to plain tuples
+    if system_version[:2] >= (3,5):
+        def extract_stack(limit=0):
+            # special handling for Python 3.5.0 - extra deep call stack by 1
+            offset = -3 if system_version == (3,5,0) else -2
+            frame_summary = traceback.extract_stack(limit=-offset+limit-1)[offset]
+            return [frame_summary[:2]]
+        def extract_tb(tb, limit=0):
+            frames = traceback.extract_tb(tb, limit=limit)
+            frame_summary = frames[-1]
+            return [frame_summary[:2]]
+    else:
+        extract_stack = traceback.extract_stack
+        extract_tb = traceback.extract_tb
+    
+    # synthesize what would be returned by traceback.extract_stack at the call to 
+    # user's parse action 'func', so that we don't incur call penalty at parse time
+    
+    LINE_DIFF = 6
+    # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND 
+    # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!!
+    this_line = extract_stack(limit=2)[-1]
+    pa_call_line_synth = (this_line[0], this_line[1]+LINE_DIFF)
+
+    def wrapper(*args):
+        while 1:
+            try:
+                ret = func(*args[limit[0]:])
+                foundArity[0] = True
+                return ret
+            except TypeError:
+                # re-raise TypeErrors if they did not come from our arity testing
+                if foundArity[0]:
+                    raise
+                else:
+                    try:
+                        tb = sys.exc_info()[-1]
+                        if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth:
+                            raise
+                    finally:
+                        del tb
+
+                if limit[0] <= maxargs:
+                    limit[0] += 1
+                    continue
+                raise
+
+    # copy func name to wrapper for sensible debug output
+    func_name = "<parse action>"
+    try:
+        func_name = getattr(func, '__name__', 
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    wrapper.__name__ = func_name
+
+    return wrapper
+
+class ParserElement(object):
+    """Abstract base level parser element class."""
+    DEFAULT_WHITE_CHARS = " \n\t\r"
+    verbose_stacktrace = False
+
+    @staticmethod
+    def setDefaultWhitespaceChars( chars ):
+        r"""
+        Overrides the default whitespace chars
+
+        Example::
+            # default whitespace chars are space, <TAB> and newline
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def', 'ghi', 'jkl']
+            
+            # change to just treat newline as significant
+            ParserElement.setDefaultWhitespaceChars(" \t")
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def']
+        """
+        ParserElement.DEFAULT_WHITE_CHARS = chars
+
+    @staticmethod
+    def inlineLiteralsUsing(cls):
+        """
+        Set class to be used for inclusion of string literals into a parser.
+        
+        Example::
+            # default literal class used is Literal
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+
+            # change to Suppress
+            ParserElement.inlineLiteralsUsing(Suppress)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '12', '31']
+        """
+        ParserElement._literalStringClass = cls
+
+    def __init__( self, savelist=False ):
+        self.parseAction = list()
+        self.failAction = None
+        #~ self.name = "<unknown>"  # don't define self.name, let subclasses try/except upcall
+        self.strRepr = None
+        self.resultsName = None
+        self.saveAsList = savelist
+        self.skipWhitespace = True
+        self.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
+        self.copyDefaultWhiteChars = True
+        self.mayReturnEmpty = False # used when checking for left-recursion
+        self.keepTabs = False
+        self.ignoreExprs = list()
+        self.debug = False
+        self.streamlined = False
+        self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index
+        self.errmsg = ""
+        self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all)
+        self.debugActions = ( None, None, None ) #custom debug actions
+        self.re = None
+        self.callPreparse = True # used to avoid redundant calls to preParse
+        self.callDuringTry = False
+
+    def copy( self ):
+        """
+        Make a copy of this C{ParserElement}.  Useful for defining different parse actions
+        for the same parsing pattern, using copies of the original parse element.
+        
+        Example::
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K")
+            integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
+            
+            print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))
+        prints::
+            [5120, 100, 655360, 268435456]
+        Equivalent form of C{expr.copy()} is just C{expr()}::
+            integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
+        """
+        cpy = copy.copy( self )
+        cpy.parseAction = self.parseAction[:]
+        cpy.ignoreExprs = self.ignoreExprs[:]
+        if self.copyDefaultWhiteChars:
+            cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
+        return cpy
+
+    def setName( self, name ):
+        """
+        Define name for this expression, makes debugging and exception messages clearer.
+        
+        Example::
+            Word(nums).parseString("ABC")  # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)
+            Word(nums).setName("integer").parseString("ABC")  # -> Exception: Expected integer (at char 0), (line:1, col:1)
+        """
+        self.name = name
+        self.errmsg = "Expected " + self.name
+        if hasattr(self,"exception"):
+            self.exception.msg = self.errmsg
+        return self
+
+    def setResultsName( self, name, listAllMatches=False ):
+        """
+        Define name for referencing matching tokens as a nested attribute
+        of the returned parse results.
+        NOTE: this returns a *copy* of the original C{ParserElement} object;
+        this is so that the client can define a basic element, such as an
+        integer, and reference it in multiple places with different names.
+
+        You can also set results names using the abbreviated syntax,
+        C{expr("name")} in place of C{expr.setResultsName("name")} - 
+        see L{I{__call__}<__call__>}.
+
+        Example::
+            date_str = (integer.setResultsName("year") + '/' 
+                        + integer.setResultsName("month") + '/' 
+                        + integer.setResultsName("day"))
+
+            # equivalent form:
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+        """
+        newself = self.copy()
+        if name.endswith("*"):
+            name = name[:-1]
+            listAllMatches=True
+        newself.resultsName = name
+        newself.modalResults = not listAllMatches
+        return newself
+
+    def setBreak(self,breakFlag = True):
+        """Method to invoke the Python pdb debugger when this element is
+           about to be parsed. Set C{breakFlag} to True to enable, False to
+           disable.
+        """
+        if breakFlag:
+            _parseMethod = self._parse
+            def breaker(instring, loc, doActions=True, callPreParse=True):
+                import pdb
+                pdb.set_trace()
+                return _parseMethod( instring, loc, doActions, callPreParse )
+            breaker._originalParseMethod = _parseMethod
+            self._parse = breaker
+        else:
+            if hasattr(self._parse,"_originalParseMethod"):
+                self._parse = self._parse._originalParseMethod
+        return self
+
+    def setParseAction( self, *fns, **kwargs ):
+        """
+        Define one or more actions to perform when successfully matching parse element definition.
+        Parse action fn is a callable method with 0-3 arguments, called as C{fn(s,loc,toks)},
+        C{fn(loc,toks)}, C{fn(toks)}, or just C{fn()}, where:
+         - s   = the original string being parsed (see note below)
+         - loc = the location of the matching substring
+         - toks = a list of the matched tokens, packaged as a C{L{ParseResults}} object
+        If the functions in fns modify the tokens, they can return them as the return
+        value from fn, and the modified list of tokens will replace the original.
+        Otherwise, fn does not need to return any value.
+
+        Optional keyword arguments:
+         - callDuringTry = (default=C{False}) indicate if parse action should be run during lookaheads and alternate testing
+
+        Note: the default parsing behavior is to expand tabs in the input string
+        before starting the parsing process.  See L{I{parseString}<parseString>} for more information
+        on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+        consistent view of the parsed string, the parse location, and line and column
+        positions within the parsed string.
+        
+        Example::
+            integer = Word(nums)
+            date_str = integer + '/' + integer + '/' + integer
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+            # use parse action to convert to ints at parse time
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            date_str = integer + '/' + integer + '/' + integer
+
+            # note that integer fields are now ints, not strings
+            date_str.parseString("1999/12/31")  # -> [1999, '/', 12, '/', 31]
+        """
+        self.parseAction = list(map(_trim_arity, list(fns)))
+        self.callDuringTry = kwargs.get("callDuringTry", False)
+        return self
+
+    def addParseAction( self, *fns, **kwargs ):
+        """
+        Add one or more parse actions to expression's list of parse actions. See L{I{setParseAction}<setParseAction>}.
+        
+        See examples in L{I{copy}<copy>}.
+        """
+        self.parseAction += list(map(_trim_arity, list(fns)))
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def addCondition(self, *fns, **kwargs):
+        """Add a boolean predicate function to expression's list of parse actions. See 
+        L{I{setParseAction}<setParseAction>} for function call signatures. Unlike C{setParseAction}, 
+        functions passed to C{addCondition} need to return boolean success/fail of the condition.
+
+        Optional keyword arguments:
+         - message = define a custom message to be used in the raised exception
+         - fatal   = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException
+         
+        Example::
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            year_int = integer.copy()
+            year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")
+            date_str = year_int + '/' + integer + '/' + integer
+
+            result = date_str.parseString("1999/12/31")  # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1)
+        """
+        msg = kwargs.get("message", "failed user-defined condition")
+        exc_type = ParseFatalException if kwargs.get("fatal", False) else ParseException
+        for fn in fns:
+            def pa(s,l,t):
+                if not bool(_trim_arity(fn)(s,l,t)):
+                    raise exc_type(s,l,msg)
+            self.parseAction.append(pa)
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def setFailAction( self, fn ):
+        """Define action to perform if parsing fails at this expression.
+           Fail acton fn is a callable function that takes the arguments
+           C{fn(s,loc,expr,err)} where:
+            - s = string being parsed
+            - loc = location where expression match was attempted and failed
+            - expr = the parse expression that failed
+            - err = the exception thrown
+           The function returns no value.  It may throw C{L{ParseFatalException}}
+           if it is desired to stop parsing immediately."""
+        self.failAction = fn
+        return self
+
+    def _skipIgnorables( self, instring, loc ):
+        exprsFound = True
+        while exprsFound:
+            exprsFound = False
+            for e in self.ignoreExprs:
+                try:
+                    while 1:
+                        loc,dummy = e._parse( instring, loc )
+                        exprsFound = True
+                except ParseException:
+                    pass
+        return loc
+
+    def preParse( self, instring, loc ):
+        if self.ignoreExprs:
+            loc = self._skipIgnorables( instring, loc )
+
+        if self.skipWhitespace:
+            wt = self.whiteChars
+            instrlen = len(instring)
+            while loc < instrlen and instring[loc] in wt:
+                loc += 1
+
+        return loc
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        return loc, []
+
+    def postParse( self, instring, loc, tokenlist ):
+        return tokenlist
+
+    #~ @profile
+    def _parseNoCache( self, instring, loc, doActions=True, callPreParse=True ):
+        debugging = ( self.debug ) #and doActions )
+
+        if debugging or self.failAction:
+            #~ print ("Match",self,"at loc",loc,"(%d,%d)" % ( lineno(loc,instring), col(loc,instring) ))
+            if (self.debugActions[0] ):
+                self.debugActions[0]( instring, loc, self )
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse( instring, loc )
+            else:
+                preloc = loc
+            tokensStart = preloc
+            try:
+                try:
+                    loc,tokens = self.parseImpl( instring, preloc, doActions )
+                except IndexError:
+                    raise ParseException( instring, len(instring), self.errmsg, self )
+            except ParseBaseException as err:
+                #~ print ("Exception raised:", err)
+                if self.debugActions[2]:
+                    self.debugActions[2]( instring, tokensStart, self, err )
+                if self.failAction:
+                    self.failAction( instring, tokensStart, self, err )
+                raise
+        else:
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse( instring, loc )
+            else:
+                preloc = loc
+            tokensStart = preloc
+            if self.mayIndexError or preloc >= len(instring):
+                try:
+                    loc,tokens = self.parseImpl( instring, preloc, doActions )
+                except IndexError:
+                    raise ParseException( instring, len(instring), self.errmsg, self )
+            else:
+                loc,tokens = self.parseImpl( instring, preloc, doActions )
+
+        tokens = self.postParse( instring, loc, tokens )
+
+        retTokens = ParseResults( tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults )
+        if self.parseAction and (doActions or self.callDuringTry):
+            if debugging:
+                try:
+                    for fn in self.parseAction:
+                        tokens = fn( instring, tokensStart, retTokens )
+                        if tokens is not None:
+                            retTokens = ParseResults( tokens,
+                                                      self.resultsName,
+                                                      asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
+                                                      modal=self.modalResults )
+                except ParseBaseException as err:
+                    #~ print "Exception raised in user parse action:", err
+                    if (self.debugActions[2] ):
+                        self.debugActions[2]( instring, tokensStart, self, err )
+                    raise
+            else:
+                for fn in self.parseAction:
+                    tokens = fn( instring, tokensStart, retTokens )
+                    if tokens is not None:
+                        retTokens = ParseResults( tokens,
+                                                  self.resultsName,
+                                                  asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
+                                                  modal=self.modalResults )
+        if debugging:
+            #~ print ("Matched",self,"->",retTokens.asList())
+            if (self.debugActions[1] ):
+                self.debugActions[1]( instring, tokensStart, loc, self, retTokens )
+
+        return loc, retTokens
+
+    def tryParse( self, instring, loc ):
+        try:
+            return self._parse( instring, loc, doActions=False )[0]
+        except ParseFatalException:
+            raise ParseException( instring, loc, self.errmsg, self)
+    
+    def canParseNext(self, instring, loc):
+        try:
+            self.tryParse(instring, loc)
+        except (ParseException, IndexError):
+            return False
+        else:
+            return True
+
+    class _UnboundedCache(object):
+        def __init__(self):
+            cache = {}
+            self.not_in_cache = not_in_cache = object()
+
+            def get(self, key):
+                return cache.get(key, not_in_cache)
+
+            def set(self, key, value):
+                cache[key] = value
+
+            def clear(self):
+                cache.clear()
+                
+            def cache_len(self):
+                return len(cache)
+
+            self.get = types.MethodType(get, self)
+            self.set = types.MethodType(set, self)
+            self.clear = types.MethodType(clear, self)
+            self.__len__ = types.MethodType(cache_len, self)
+
+    if _OrderedDict is not None:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = _OrderedDict()
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(cache) > size:
+                        try:
+                            cache.popitem(False)
+                        except KeyError:
+                            pass
+
+                def clear(self):
+                    cache.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    else:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = {}
+                key_fifo = collections.deque([], size)
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(key_fifo) > size:
+                        cache.pop(key_fifo.popleft(), None)
+                    key_fifo.append(key)
+
+                def clear(self):
+                    cache.clear()
+                    key_fifo.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    # argument cache for optimizing repeated calls when backtracking through recursive expressions
+    packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail
+    packrat_cache_lock = RLock()
+    packrat_cache_stats = [0, 0]
+
+    # this method gets repeatedly called during backtracking with the same arguments -
+    # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression
+    def _parseCache( self, instring, loc, doActions=True, callPreParse=True ):
+        HIT, MISS = 0, 1
+        lookup = (self, instring, loc, callPreParse, doActions)
+        with ParserElement.packrat_cache_lock:
+            cache = ParserElement.packrat_cache
+            value = cache.get(lookup)
+            if value is cache.not_in_cache:
+                ParserElement.packrat_cache_stats[MISS] += 1
+                try:
+                    value = self._parseNoCache(instring, loc, doActions, callPreParse)
+                except ParseBaseException as pe:
+                    # cache a copy of the exception, without the traceback
+                    cache.set(lookup, pe.__class__(*pe.args))
+                    raise
+                else:
+                    cache.set(lookup, (value[0], value[1].copy()))
+                    return value
+            else:
+                ParserElement.packrat_cache_stats[HIT] += 1
+                if isinstance(value, Exception):
+                    raise value
+                return (value[0], value[1].copy())
+
+    _parse = _parseNoCache
+
+    @staticmethod
+    def resetCache():
+        ParserElement.packrat_cache.clear()
+        ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats)
+
+    _packratEnabled = False
+    @staticmethod
+    def enablePackrat(cache_size_limit=128):
+        """Enables "packrat" parsing, which adds memoizing to the parsing logic.
+           Repeated parse attempts at the same string location (which happens
+           often in many complex grammars) can immediately return a cached value,
+           instead of re-executing parsing/validating code.  Memoizing is done of
+           both valid results and parsing exceptions.
+           
+           Parameters:
+            - cache_size_limit - (default=C{128}) - if an integer value is provided
+              will limit the size of the packrat cache; if None is passed, then
+              the cache size will be unbounded; if 0 is passed, the cache will
+              be effectively disabled.
+            
+           This speedup may break existing programs that use parse actions that
+           have side-effects.  For this reason, packrat parsing is disabled when
+           you first import pyparsing.  To activate the packrat feature, your
+           program must call the class method C{ParserElement.enablePackrat()}.  If
+           your program uses C{psyco} to "compile as you go", you must call
+           C{enablePackrat} before calling C{psyco.full()}.  If you do not do this,
+           Python will crash.  For best results, call C{enablePackrat()} immediately
+           after importing pyparsing.
+           
+           Example::
+               import pyparsing
+               pyparsing.ParserElement.enablePackrat()
+        """
+        if not ParserElement._packratEnabled:
+            ParserElement._packratEnabled = True
+            if cache_size_limit is None:
+                ParserElement.packrat_cache = ParserElement._UnboundedCache()
+            else:
+                ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit)
+            ParserElement._parse = ParserElement._parseCache
+
+    def parseString( self, instring, parseAll=False ):
+        """
+        Execute the parse expression with the given string.
+        This is the main interface to the client code, once the complete
+        expression has been built.
+
+        If you want the grammar to require that the entire input string be
+        successfully parsed, then set C{parseAll} to True (equivalent to ending
+        the grammar with C{L{StringEnd()}}).
+
+        Note: C{parseString} implicitly calls C{expandtabs()} on the input string,
+        in order to report proper column numbers in parse actions.
+        If the input string contains tabs and
+        the grammar uses parse actions that use the C{loc} argument to index into the
+        string being parsed, you can ensure you have a consistent view of the input
+        string by:
+         - calling C{parseWithTabs} on your grammar before calling C{parseString}
+           (see L{I{parseWithTabs}<parseWithTabs>})
+         - define your parse action using the full C{(s,loc,toks)} signature, and
+           reference the input string using the parse action's C{s} argument
+         - explictly expand the tabs in your input string before calling
+           C{parseString}
+        
+        Example::
+            Word('a').parseString('aaaaabaaa')  # -> ['aaaaa']
+            Word('a').parseString('aaaaabaaa', parseAll=True)  # -> Exception: Expected end of text
+        """
+        ParserElement.resetCache()
+        if not self.streamlined:
+            self.streamline()
+            #~ self.saveAsList = True
+        for e in self.ignoreExprs:
+            e.streamline()
+        if not self.keepTabs:
+            instring = instring.expandtabs()
+        try:
+            loc, tokens = self._parse( instring, 0 )
+            if parseAll:
+                loc = self.preParse( instring, loc )
+                se = Empty() + StringEnd()
+                se._parse( instring, loc )
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+        else:
+            return tokens
+
+    def scanString( self, instring, maxMatches=_MAX_INT, overlap=False ):
+        """
+        Scan the input string for expression matches.  Each match will return the
+        matching tokens, start location, and end location.  May be called with optional
+        C{maxMatches} argument, to clip scanning after 'n' matches are found.  If
+        C{overlap} is specified, then overlapping matches will be reported.
+
+        Note that the start and end locations are reported relative to the string
+        being parsed.  See L{I{parseString}<parseString>} for more information on parsing
+        strings with embedded tabs.
+
+        Example::
+            source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"
+            print(source)
+            for tokens,start,end in Word(alphas).scanString(source):
+                print(' '*start + '^'*(end-start))
+                print(' '*start + tokens[0])
+        
+        prints::
+        
+            sldjf123lsdjjkf345sldkjf879lkjsfd987
+            ^^^^^
+            sldjf
+                    ^^^^^^^
+                    lsdjjkf
+                              ^^^^^^
+                              sldkjf
+                                       ^^^^^^
+                                       lkjsfd
+        """
+        if not self.streamlined:
+            self.streamline()
+        for e in self.ignoreExprs:
+            e.streamline()
+
+        if not self.keepTabs:
+            instring = _ustr(instring).expandtabs()
+        instrlen = len(instring)
+        loc = 0
+        preparseFn = self.preParse
+        parseFn = self._parse
+        ParserElement.resetCache()
+        matches = 0
+        try:
+            while loc <= instrlen and matches < maxMatches:
+                try:
+                    preloc = preparseFn( instring, loc )
+                    nextLoc,tokens = parseFn( instring, preloc, callPreParse=False )
+                except ParseException:
+                    loc = preloc+1
+                else:
+                    if nextLoc > loc:
+                        matches += 1
+                        yield tokens, preloc, nextLoc
+                        if overlap:
+                            nextloc = preparseFn( instring, loc )
+                            if nextloc > loc:
+                                loc = nextLoc
+                            else:
+                                loc += 1
+                        else:
+                            loc = nextLoc
+                    else:
+                        loc = preloc+1
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def transformString( self, instring ):
+        """
+        Extension to C{L{scanString}}, to modify matching text with modified tokens that may
+        be returned from a parse action.  To use C{transformString}, define a grammar and
+        attach a parse action to it that modifies the returned token list.
+        Invoking C{transformString()} on a target string will then scan for matches,
+        and replace the matched text patterns according to the logic in the parse
+        action.  C{transformString()} returns the resulting transformed string.
+        
+        Example::
+            wd = Word(alphas)
+            wd.setParseAction(lambda toks: toks[0].title())
+            
+            print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york."))
+        Prints::
+            Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.
+        """
+        out = []
+        lastE = 0
+        # force preservation of <TAB>s, to minimize unwanted transformation of string, and to
+        # keep string locs straight between transformString and scanString
+        self.keepTabs = True
+        try:
+            for t,s,e in self.scanString( instring ):
+                out.append( instring[lastE:s] )
+                if t:
+                    if isinstance(t,ParseResults):
+                        out += t.asList()
+                    elif isinstance(t,list):
+                        out += t
+                    else:
+                        out.append(t)
+                lastE = e
+            out.append(instring[lastE:])
+            out = [o for o in out if o]
+            return "".join(map(_ustr,_flatten(out)))
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def searchString( self, instring, maxMatches=_MAX_INT ):
+        """
+        Another extension to C{L{scanString}}, simplifying the access to the tokens found
+        to match the given parse expression.  May be called with optional
+        C{maxMatches} argument, to clip searching after 'n' matches are found.
+        
+        Example::
+            # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters
+            cap_word = Word(alphas.upper(), alphas.lower())
+            
+            print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))
+
+            # the sum() builtin can be used to merge results into a single ParseResults object
+            print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")))
+        prints::
+            [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]
+            ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']
+        """
+        try:
+            return ParseResults([ t for t,s,e in self.scanString( instring, maxMatches ) ])
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False):
+        """
+        Generator method to split a string using the given expression as a separator.
+        May be called with optional C{maxsplit} argument, to limit the number of splits;
+        and the optional C{includeSeparators} argument (default=C{False}), if the separating
+        matching text should be included in the split results.
+        
+        Example::        
+            punc = oneOf(list(".,;:/-!?"))
+            print(list(punc.split("This, this?, this sentence, is badly punctuated!")))
+        prints::
+            ['This', ' this', '', ' this sentence', ' is badly punctuated', '']
+        """
+        splits = 0
+        last = 0
+        for t,s,e in self.scanString(instring, maxMatches=maxsplit):
+            yield instring[last:s]
+            if includeSeparators:
+                yield t[0]
+            last = e
+        yield instring[last:]
+
+    def __add__(self, other ):
+        """
+        Implementation of + operator - returns C{L{And}}. Adding strings to a ParserElement
+        converts them to L{Literal}s by default.
+        
+        Example::
+            greet = Word(alphas) + "," + Word(alphas) + "!"
+            hello = "Hello, World!"
+            print (hello, "->", greet.parseString(hello))
+        Prints::
+            Hello, World! -> ['Hello', ',', 'World', '!']
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return And( [ self, other ] )
+
+    def __radd__(self, other ):
+        """
+        Implementation of + operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other + self
+
+    def __sub__(self, other):
+        """
+        Implementation of - operator, returns C{L{And}} with error stop
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return self + And._ErrorStop() + other
+
+    def __rsub__(self, other ):
+        """
+        Implementation of - operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other - self
+
+    def __mul__(self,other):
+        """
+        Implementation of * operator, allows use of C{expr * 3} in place of
+        C{expr + expr + expr}.  Expressions may also me multiplied by a 2-integer
+        tuple, similar to C{{min,max}} multipliers in regular expressions.  Tuples
+        may also include C{None} as in:
+         - C{expr*(n,None)} or C{expr*(n,)} is equivalent
+              to C{expr*n + L{ZeroOrMore}(expr)}
+              (read as "at least n instances of C{expr}")
+         - C{expr*(None,n)} is equivalent to C{expr*(0,n)}
+              (read as "0 to n instances of C{expr}")
+         - C{expr*(None,None)} is equivalent to C{L{ZeroOrMore}(expr)}
+         - C{expr*(1,None)} is equivalent to C{L{OneOrMore}(expr)}
+
+        Note that C{expr*(None,n)} does not raise an exception if
+        more than n exprs exist in the input stream; that is,
+        C{expr*(None,n)} does not enforce a maximum number of expr
+        occurrences.  If this behavior is desired, then write
+        C{expr*(None,n) + ~expr}
+        """
+        if isinstance(other,int):
+            minElements, optElements = other,0
+        elif isinstance(other,tuple):
+            other = (other + (None, None))[:2]
+            if other[0] is None:
+                other = (0, other[1])
+            if isinstance(other[0],int) and other[1] is None:
+                if other[0] == 0:
+                    return ZeroOrMore(self)
+                if other[0] == 1:
+                    return OneOrMore(self)
+                else:
+                    return self*other[0] + ZeroOrMore(self)
+            elif isinstance(other[0],int) and isinstance(other[1],int):
+                minElements, optElements = other
+                optElements -= minElements
+            else:
+                raise TypeError("cannot multiply 'ParserElement' and ('%s','%s') objects", type(other[0]),type(other[1]))
+        else:
+            raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other))
+
+        if minElements < 0:
+            raise ValueError("cannot multiply ParserElement by negative value")
+        if optElements < 0:
+            raise ValueError("second tuple value must be greater or equal to first tuple value")
+        if minElements == optElements == 0:
+            raise ValueError("cannot multiply ParserElement by 0 or (0,0)")
+
+        if (optElements):
+            def makeOptionalList(n):
+                if n>1:
+                    return Optional(self + makeOptionalList(n-1))
+                else:
+                    return Optional(self)
+            if minElements:
+                if minElements == 1:
+                    ret = self + makeOptionalList(optElements)
+                else:
+                    ret = And([self]*minElements) + makeOptionalList(optElements)
+            else:
+                ret = makeOptionalList(optElements)
+        else:
+            if minElements == 1:
+                ret = self
+            else:
+                ret = And([self]*minElements)
+        return ret
+
+    def __rmul__(self, other):
+        return self.__mul__(other)
+
+    def __or__(self, other ):
+        """
+        Implementation of | operator - returns C{L{MatchFirst}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return MatchFirst( [ self, other ] )
+
+    def __ror__(self, other ):
+        """
+        Implementation of | operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other | self
+
+    def __xor__(self, other ):
+        """
+        Implementation of ^ operator - returns C{L{Or}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return Or( [ self, other ] )
+
+    def __rxor__(self, other ):
+        """
+        Implementation of ^ operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other ^ self
+
+    def __and__(self, other ):
+        """
+        Implementation of & operator - returns C{L{Each}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return Each( [ self, other ] )
+
+    def __rand__(self, other ):
+        """
+        Implementation of & operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other & self
+
+    def __invert__( self ):
+        """
+        Implementation of ~ operator - returns C{L{NotAny}}
+        """
+        return NotAny( self )
+
+    def __call__(self, name=None):
+        """
+        Shortcut for C{L{setResultsName}}, with C{listAllMatches=False}.
+        
+        If C{name} is given with a trailing C{'*'} character, then C{listAllMatches} will be
+        passed as C{True}.
+           
+        If C{name} is omitted, same as calling C{L{copy}}.
+
+        Example::
+            # these are equivalent
+            userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno")
+            userdata = Word(alphas)("name") + Word(nums+"-")("socsecno")             
+        """
+        if name is not None:
+            return self.setResultsName(name)
+        else:
+            return self.copy()
+
+    def suppress( self ):
+        """
+        Suppresses the output of this C{ParserElement}; useful to keep punctuation from
+        cluttering up returned output.
+        """
+        return Suppress( self )
+
+    def leaveWhitespace( self ):
+        """
+        Disables the skipping of whitespace before matching the characters in the
+        C{ParserElement}'s defined pattern.  This is normally only used internally by
+        the pyparsing module, but may be needed in some whitespace-sensitive grammars.
+        """
+        self.skipWhitespace = False
+        return self
+
+    def setWhitespaceChars( self, chars ):
+        """
+        Overrides the default whitespace chars
+        """
+        self.skipWhitespace = True
+        self.whiteChars = chars
+        self.copyDefaultWhiteChars = False
+        return self
+
+    def parseWithTabs( self ):
+        """
+        Overrides default behavior to expand C{<TAB>}s to spaces before parsing the input string.
+        Must be called before C{parseString} when the input grammar contains elements that
+        match C{<TAB>} characters.
+        """
+        self.keepTabs = True
+        return self
+
+    def ignore( self, other ):
+        """
+        Define expression to be ignored (e.g., comments) while doing pattern
+        matching; may be called repeatedly, to define multiple comment or other
+        ignorable patterns.
+        
+        Example::
+            patt = OneOrMore(Word(alphas))
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']
+            
+            patt.ignore(cStyleComment)
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']
+        """
+        if isinstance(other, basestring):
+            other = Suppress(other)
+
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                self.ignoreExprs.append(other)
+        else:
+            self.ignoreExprs.append( Suppress( other.copy() ) )
+        return self
+
+    def setDebugActions( self, startAction, successAction, exceptionAction ):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        """
+        self.debugActions = (startAction or _defaultStartDebugAction,
+                             successAction or _defaultSuccessDebugAction,
+                             exceptionAction or _defaultExceptionDebugAction)
+        self.debug = True
+        return self
+
+    def setDebug( self, flag=True ):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        Set C{flag} to True to enable, False to disable.
+
+        Example::
+            wd = Word(alphas).setName("alphaword")
+            integer = Word(nums).setName("numword")
+            term = wd | integer
+            
+            # turn on debugging for wd
+            wd.setDebug()
+
+            OneOrMore(term).parseString("abc 123 xyz 890")
+        
+        prints::
+            Match alphaword at loc 0(1,1)
+            Matched alphaword -> ['abc']
+            Match alphaword at loc 3(1,4)
+            Exception raised:Expected alphaword (at char 4), (line:1, col:5)
+            Match alphaword at loc 7(1,8)
+            Matched alphaword -> ['xyz']
+            Match alphaword at loc 11(1,12)
+            Exception raised:Expected alphaword (at char 12), (line:1, col:13)
+            Match alphaword at loc 15(1,16)
+            Exception raised:Expected alphaword (at char 15), (line:1, col:16)
+
+        The output shown is that produced by the default debug actions - custom debug actions can be
+        specified using L{setDebugActions}. Prior to attempting
+        to match the C{wd} expression, the debugging message C{"Match <exprname> at loc <n>(<line>,<col>)"}
+        is shown. Then if the parse succeeds, a C{"Matched"} message is shown, or an C{"Exception raised"}
+        message is shown. Also note the use of L{setName} to assign a human-readable name to the expression,
+        which makes debugging and exception messages easier to understand - for instance, the default
+        name created for the C{Word} expression without calling C{setName} is C{"W:(ABCD...)"}.
+        """
+        if flag:
+            self.setDebugActions( _defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction )
+        else:
+            self.debug = False
+        return self
+
+    def __str__( self ):
+        return self.name
+
+    def __repr__( self ):
+        return _ustr(self)
+
+    def streamline( self ):
+        self.streamlined = True
+        self.strRepr = None
+        return self
+
+    def checkRecursion( self, parseElementList ):
+        pass
+
+    def validate( self, validateTrace=[] ):
+        """
+        Check defined expressions for valid structure, check for infinite recursive definitions.
+        """
+        self.checkRecursion( [] )
+
+    def parseFile( self, file_or_filename, parseAll=False ):
+        """
+        Execute the parse expression on the given file or filename.
+        If a filename is specified (instead of a file object),
+        the entire file is opened, read, and closed before parsing.
+        """
+        try:
+            file_contents = file_or_filename.read()
+        except AttributeError:
+            with open(file_or_filename, "r") as f:
+                file_contents = f.read()
+        try:
+            return self.parseString(file_contents, parseAll)
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def __eq__(self,other):
+        if isinstance(other, ParserElement):
+            return self is other or vars(self) == vars(other)
+        elif isinstance(other, basestring):
+            return self.matches(other)
+        else:
+            return super(ParserElement,self)==other
+
+    def __ne__(self,other):
+        return not (self == other)
+
+    def __hash__(self):
+        return hash(id(self))
+
+    def __req__(self,other):
+        return self == other
+
+    def __rne__(self,other):
+        return not (self == other)
+
+    def matches(self, testString, parseAll=True):
+        """
+        Method for quick testing of a parser against a test string. Good for simple 
+        inline microtests of sub expressions while building up larger parser.
+           
+        Parameters:
+         - testString - to test against this expression for a match
+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests
+            
+        Example::
+            expr = Word(nums)
+            assert expr.matches("100")
+        """
+        try:
+            self.parseString(_ustr(testString), parseAll=parseAll)
+            return True
+        except ParseBaseException:
+            return False
+                
+    def runTests(self, tests, parseAll=True, comment='#', fullDump=True, printResults=True, failureTests=False):
+        """
+        Execute the parse expression on a series of test strings, showing each
+        test, the parsed results or where the parse failed. Quick and easy way to
+        run a parse expression against a list of sample strings.
+           
+        Parameters:
+         - tests - a list of separate test strings, or a multiline string of test strings
+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests           
+         - comment - (default=C{'#'}) - expression for indicating embedded comments in the test 
+              string; pass None to disable comment filtering
+         - fullDump - (default=C{True}) - dump results as list followed by results names in nested outline;
+              if False, only dump nested list
+         - printResults - (default=C{True}) prints test output to stdout
+         - failureTests - (default=C{False}) indicates if these tests are expected to fail parsing
+
+        Returns: a (success, results) tuple, where success indicates that all tests succeeded
+        (or failed if C{failureTests} is True), and the results contain a list of lines of each 
+        test's output
+        
+        Example::
+            number_expr = pyparsing_common.number.copy()
+
+            result = number_expr.runTests('''
+                # unsigned integer
+                100
+                # negative integer
+                -100
+                # float with scientific notation
+                6.02e23
+                # integer with scientific notation
+                1e-12
+                ''')
+            print("Success" if result[0] else "Failed!")
+
+            result = number_expr.runTests('''
+                # stray character
+                100Z
+                # missing leading digit before '.'
+                -.100
+                # too many '.'
+                3.14.159
+                ''', failureTests=True)
+            print("Success" if result[0] else "Failed!")
+        prints::
+            # unsigned integer
+            100
+            [100]
+
+            # negative integer
+            -100
+            [-100]
+
+            # float with scientific notation
+            6.02e23
+            [6.02e+23]
+
+            # integer with scientific notation
+            1e-12
+            [1e-12]
+
+            Success
+            
+            # stray character
+            100Z
+               ^
+            FAIL: Expected end of text (at char 3), (line:1, col:4)
+
+            # missing leading digit before '.'
+            -.100
+            ^
+            FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)
+
+            # too many '.'
+            3.14.159
+                ^
+            FAIL: Expected end of text (at char 4), (line:1, col:5)
+
+            Success
+
+        Each test string must be on a single line. If you want to test a string that spans multiple
+        lines, create a test like this::
+
+            expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines")
+        
+        (Note that this is a raw string literal, you must include the leading 'r'.)
+        """
+        if isinstance(tests, basestring):
+            tests = list(map(str.strip, tests.rstrip().splitlines()))
+        if isinstance(comment, basestring):
+            comment = Literal(comment)
+        allResults = []
+        comments = []
+        success = True
+        for t in tests:
+            if comment is not None and comment.matches(t, False) or comments and not t:
+                comments.append(t)
+                continue
+            if not t:
+                continue
+            out = ['\n'.join(comments), t]
+            comments = []
+            try:
+                t = t.replace(r'\n','\n')
+                result = self.parseString(t, parseAll=parseAll)
+                out.append(result.dump(full=fullDump))
+                success = success and not failureTests
+            except ParseBaseException as pe:
+                fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else ""
+                if '\n' in t:
+                    out.append(line(pe.loc, t))
+                    out.append(' '*(col(pe.loc,t)-1) + '^' + fatal)
+                else:
+                    out.append(' '*pe.loc + '^' + fatal)
+                out.append("FAIL: " + str(pe))
+                success = success and failureTests
+                result = pe
+            except Exception as exc:
+                out.append("FAIL-EXCEPTION: " + str(exc))
+                success = success and failureTests
+                result = exc
+
+            if printResults:
+                if fullDump:
+                    out.append('')
+                print('\n'.join(out))
+
+            allResults.append((t, result))
+        
+        return success, allResults
+
+        
+class Token(ParserElement):
+    """
+    Abstract C{ParserElement} subclass, for defining atomic matching patterns.
+    """
+    def __init__( self ):
+        super(Token,self).__init__( savelist=False )
+
+
+class Empty(Token):
+    """
+    An empty token, will always match.
+    """
+    def __init__( self ):
+        super(Empty,self).__init__()
+        self.name = "Empty"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+
+class NoMatch(Token):
+    """
+    A token that will never match.
+    """
+    def __init__( self ):
+        super(NoMatch,self).__init__()
+        self.name = "NoMatch"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.errmsg = "Unmatchable token"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Literal(Token):
+    """
+    Token to exactly match a specified string.
+    
+    Example::
+        Literal('blah').parseString('blah')  # -> ['blah']
+        Literal('blah').parseString('blahfooblah')  # -> ['blah']
+        Literal('blah').parseString('bla')  # -> Exception: Expected "blah"
+    
+    For case-insensitive matching, use L{CaselessLiteral}.
+    
+    For keyword matching (force word break before and after the matched string),
+    use L{Keyword} or L{CaselessKeyword}.
+    """
+    def __init__( self, matchString ):
+        super(Literal,self).__init__()
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Literal; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+            self.__class__ = Empty
+        self.name = '"%s"' % _ustr(self.match)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+
+    # Performance tuning: this routine gets called a *lot*
+    # if this is a single character match string  and the first character matches,
+    # short-circuit as quickly as possible, and avoid calling startswith
+    #~ @profile
+    def parseImpl( self, instring, loc, doActions=True ):
+        if (instring[loc] == self.firstMatchChar and
+            (self.matchLen==1 or instring.startswith(self.match,loc)) ):
+            return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+_L = Literal
+ParserElement._literalStringClass = Literal
+
+class Keyword(Token):
+    """
+    Token to exactly match a specified string as a keyword, that is, it must be
+    immediately followed by a non-keyword character.  Compare with C{L{Literal}}:
+     - C{Literal("if")} will match the leading C{'if'} in C{'ifAndOnlyIf'}.
+     - C{Keyword("if")} will not; it will only match the leading C{'if'} in C{'if x=1'}, or C{'if(y==2)'}
+    Accepts two optional constructor arguments in addition to the keyword string:
+     - C{identChars} is a string of characters that would be valid identifier characters,
+          defaulting to all alphanumerics + "_" and "$"
+     - C{caseless} allows case-insensitive matching, default is C{False}.
+       
+    Example::
+        Keyword("start").parseString("start")  # -> ['start']
+        Keyword("start").parseString("starting")  # -> Exception
+
+    For case-insensitive matching, use L{CaselessKeyword}.
+    """
+    DEFAULT_KEYWORD_CHARS = alphanums+"_$"
+
+    def __init__( self, matchString, identChars=None, caseless=False ):
+        super(Keyword,self).__init__()
+        if identChars is None:
+            identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Keyword; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+        self.name = '"%s"' % self.match
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+        self.caseless = caseless
+        if caseless:
+            self.caselessmatch = matchString.upper()
+            identChars = identChars.upper()
+        self.identChars = set(identChars)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.caseless:
+            if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and
+                 (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) and
+                 (loc == 0 or instring[loc-1].upper() not in self.identChars) ):
+                return loc+self.matchLen, self.match
+        else:
+            if (instring[loc] == self.firstMatchChar and
+                (self.matchLen==1 or instring.startswith(self.match,loc)) and
+                (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen] not in self.identChars) and
+                (loc == 0 or instring[loc-1] not in self.identChars) ):
+                return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+    def copy(self):
+        c = super(Keyword,self).copy()
+        c.identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        return c
+
+    @staticmethod
+    def setDefaultKeywordChars( chars ):
+        """Overrides the default Keyword chars
+        """
+        Keyword.DEFAULT_KEYWORD_CHARS = chars
+
+class CaselessLiteral(Literal):
+    """
+    Token to match a specified string, ignoring case of letters.
+    Note: the matched results will always be in the case of the given
+    match string, NOT the case of the input text.
+
+    Example::
+        OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD']
+        
+    (Contrast with example for L{CaselessKeyword}.)
+    """
+    def __init__( self, matchString ):
+        super(CaselessLiteral,self).__init__( matchString.upper() )
+        # Preserve the defining literal.
+        self.returnString = matchString
+        self.name = "'%s'" % self.returnString
+        self.errmsg = "Expected " + self.name
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[ loc:loc+self.matchLen ].upper() == self.match:
+            return loc+self.matchLen, self.returnString
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class CaselessKeyword(Keyword):
+    """
+    Caseless version of L{Keyword}.
+
+    Example::
+        OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD']
+        
+    (Contrast with example for L{CaselessLiteral}.)
+    """
+    def __init__( self, matchString, identChars=None ):
+        super(CaselessKeyword,self).__init__( matchString, identChars, caseless=True )
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and
+             (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) ):
+            return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class CloseMatch(Token):
+    """
+    A variation on L{Literal} which matches "close" matches, that is, 
+    strings with at most 'n' mismatching characters. C{CloseMatch} takes parameters:
+     - C{match_string} - string to be matched
+     - C{maxMismatches} - (C{default=1}) maximum number of mismatches allowed to count as a match
+    
+    The results from a successful parse will contain the matched text from the input string and the following named results:
+     - C{mismatches} - a list of the positions within the match_string where mismatches were found
+     - C{original} - the original match_string used to compare against the input string
+    
+    If C{mismatches} is an empty list, then the match was an exact match.
+    
+    Example::
+        patt = CloseMatch("ATCATCGAATGGA")
+        patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})
+        patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)
+
+        # exact match
+        patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})
+
+        # close match allowing up to 2 mismatches
+        patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2)
+        patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})
+    """
+    def __init__(self, match_string, maxMismatches=1):
+        super(CloseMatch,self).__init__()
+        self.name = match_string
+        self.match_string = match_string
+        self.maxMismatches = maxMismatches
+        self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches)
+        self.mayIndexError = False
+        self.mayReturnEmpty = False
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        start = loc
+        instrlen = len(instring)
+        maxloc = start + len(self.match_string)
+
+        if maxloc <= instrlen:
+            match_string = self.match_string
+            match_stringloc = 0
+            mismatches = []
+            maxMismatches = self.maxMismatches
+
+            for match_stringloc,s_m in enumerate(zip(instring[loc:maxloc], self.match_string)):
+                src,mat = s_m
+                if src != mat:
+                    mismatches.append(match_stringloc)
+                    if len(mismatches) > maxMismatches:
+                        break
+            else:
+                loc = match_stringloc + 1
+                results = ParseResults([instring[start:loc]])
+                results['original'] = self.match_string
+                results['mismatches'] = mismatches
+                return loc, results
+
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Word(Token):
+    """
+    Token for matching words composed of allowed character sets.
+    Defined with string containing all allowed initial characters,
+    an optional string containing allowed body characters (if omitted,
+    defaults to the initial character set), and an optional minimum,
+    maximum, and/or exact length.  The default value for C{min} is 1 (a
+    minimum value < 1 is not valid); the default values for C{max} and C{exact}
+    are 0, meaning no maximum or exact length restriction. An optional
+    C{excludeChars} parameter can list characters that might be found in 
+    the input C{bodyChars} string; useful to define a word of all printables
+    except for one or two characters, for instance.
+    
+    L{srange} is useful for defining custom character set strings for defining 
+    C{Word} expressions, using range notation from regular expression character sets.
+    
+    A common mistake is to use C{Word} to match a specific literal string, as in 
+    C{Word("Address")}. Remember that C{Word} uses the string argument to define
+    I{sets} of matchable characters. This expression would match "Add", "AAA",
+    "dAred", or any other word made up of the characters 'A', 'd', 'r', 'e', and 's'.
+    To match an exact literal string, use L{Literal} or L{Keyword}.
+
+    pyparsing includes helper strings for building Words:
+     - L{alphas}
+     - L{nums}
+     - L{alphanums}
+     - L{hexnums}
+     - L{alphas8bit} (alphabetic characters in ASCII range 128-255 - accented, tilded, umlauted, etc.)
+     - L{punc8bit} (non-alphabetic characters in ASCII range 128-255 - currency, symbols, superscripts, diacriticals, etc.)
+     - L{printables} (any non-whitespace character)
+
+    Example::
+        # a word composed of digits
+        integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))
+        
+        # a word with a leading capital, and zero or more lowercase
+        capital_word = Word(alphas.upper(), alphas.lower())
+
+        # hostnames are alphanumeric, with leading alpha, and '-'
+        hostname = Word(alphas, alphanums+'-')
+        
+        # roman numeral (not a strict parser, accepts invalid mix of characters)
+        roman = Word("IVXLCDM")
+        
+        # any string of non-whitespace characters, except for ','
+        csv_value = Word(printables, excludeChars=",")
+    """
+    def __init__( self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None ):
+        super(Word,self).__init__()
+        if excludeChars:
+            initChars = ''.join(c for c in initChars if c not in excludeChars)
+            if bodyChars:
+                bodyChars = ''.join(c for c in bodyChars if c not in excludeChars)
+        self.initCharsOrig = initChars
+        self.initChars = set(initChars)
+        if bodyChars :
+            self.bodyCharsOrig = bodyChars
+            self.bodyChars = set(bodyChars)
+        else:
+            self.bodyCharsOrig = initChars
+            self.bodyChars = set(initChars)
+
+        self.maxSpecified = max > 0
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.asKeyword = asKeyword
+
+        if ' ' not in self.initCharsOrig+self.bodyCharsOrig and (min==1 and max==0 and exact==0):
+            if self.bodyCharsOrig == self.initCharsOrig:
+                self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig)
+            elif len(self.initCharsOrig) == 1:
+                self.reString = "%s[%s]*" % \
+                                      (re.escape(self.initCharsOrig),
+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
+            else:
+                self.reString = "[%s][%s]*" % \
+                                      (_escapeRegexRangeChars(self.initCharsOrig),
+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
+            if self.asKeyword:
+                self.reString = r"\b"+self.reString+r"\b"
+            try:
+                self.re = re.compile( self.reString )
+            except Exception:
+                self.re = None
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.re:
+            result = self.re.match(instring,loc)
+            if not result:
+                raise ParseException(instring, loc, self.errmsg, self)
+
+            loc = result.end()
+            return loc, result.group()
+
+        if not(instring[ loc ] in self.initChars):
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        instrlen = len(instring)
+        bodychars = self.bodyChars
+        maxloc = start + self.maxLen
+        maxloc = min( maxloc, instrlen )
+        while loc < maxloc and instring[loc] in bodychars:
+            loc += 1
+
+        throwException = False
+        if loc - start < self.minLen:
+            throwException = True
+        if self.maxSpecified and loc < instrlen and instring[loc] in bodychars:
+            throwException = True
+        if self.asKeyword:
+            if (start>0 and instring[start-1] in bodychars) or (loc<instrlen and instring[loc] in bodychars):
+                throwException = True
+
+        if throwException:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__( self ):
+        try:
+            return super(Word,self).__str__()
+        except Exception:
+            pass
+
+
+        if self.strRepr is None:
+
+            def charsAsStr(s):
+                if len(s)>4:
+                    return s[:4]+"..."
+                else:
+                    return s
+
+            if ( self.initCharsOrig != self.bodyCharsOrig ):
+                self.strRepr = "W:(%s,%s)" % ( charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig) )
+            else:
+                self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig)
+
+        return self.strRepr
+
+
+class Regex(Token):
+    r"""
+    Token for matching strings that match a given regular expression.
+    Defined with string specifying the regular expression in a form recognized by the inbuilt Python re module.
+    If the given regex contains named groups (defined using C{(?P<name>...)}), these will be preserved as 
+    named parse results.
+
+    Example::
+        realnum = Regex(r"[+-]?\d+\.\d*")
+        date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')
+        # ref: http://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression
+        roman = Regex(r"M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")
+    """
+    compiledREtype = type(re.compile("[A-Z]"))
+    def __init__( self, pattern, flags=0):
+        """The parameters C{pattern} and C{flags} are passed to the C{re.compile()} function as-is. See the Python C{re} module for an explanation of the acceptable patterns and flags."""
+        super(Regex,self).__init__()
+
+        if isinstance(pattern, basestring):
+            if not pattern:
+                warnings.warn("null string passed to Regex; use Empty() instead",
+                        SyntaxWarning, stacklevel=2)
+
+            self.pattern = pattern
+            self.flags = flags
+
+            try:
+                self.re = re.compile(self.pattern, self.flags)
+                self.reString = self.pattern
+            except sre_constants.error:
+                warnings.warn("invalid pattern (%s) passed to Regex" % pattern,
+                    SyntaxWarning, stacklevel=2)
+                raise
+
+        elif isinstance(pattern, Regex.compiledREtype):
+            self.re = pattern
+            self.pattern = \
+            self.reString = str(pattern)
+            self.flags = flags
+            
+        else:
+            raise ValueError("Regex may only be constructed with a string or a compiled RE object")
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        result = self.re.match(instring,loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        d = result.groupdict()
+        ret = ParseResults(result.group())
+        if d:
+            for k in d:
+                ret[k] = d[k]
+        return loc,ret
+
+    def __str__( self ):
+        try:
+            return super(Regex,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "Re:(%s)" % repr(self.pattern)
+
+        return self.strRepr
+
+
+class QuotedString(Token):
+    r"""
+    Token for matching strings that are delimited by quoting characters.
+    
+    Defined with the following parameters:
+        - quoteChar - string of one or more characters defining the quote delimiting string
+        - escChar - character to escape quotes, typically backslash (default=C{None})
+        - escQuote - special quote sequence to escape an embedded quote string (such as SQL's "" to escape an embedded ") (default=C{None})
+        - multiline - boolean indicating whether quotes can span multiple lines (default=C{False})
+        - unquoteResults - boolean indicating whether the matched text should be unquoted (default=C{True})
+        - endQuoteChar - string of one or more characters defining the end of the quote delimited string (default=C{None} => same as quoteChar)
+        - convertWhitespaceEscapes - convert escaped whitespace (C{'\t'}, C{'\n'}, etc.) to actual whitespace (default=C{True})
+
+    Example::
+        qs = QuotedString('"')
+        print(qs.searchString('lsjdf "This is the quote" sldjf'))
+        complex_qs = QuotedString('{{', endQuoteChar='}}')
+        print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf'))
+        sql_qs = QuotedString('"', escQuote='""')
+        print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))
+    prints::
+        [['This is the quote']]
+        [['This is the "quote"']]
+        [['This is the quote with "embedded" quotes']]
+    """
+    def __init__( self, quoteChar, escChar=None, escQuote=None, multiline=False, unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True):
+        super(QuotedString,self).__init__()
+
+        # remove white space from quote chars - wont work anyway
+        quoteChar = quoteChar.strip()
+        if not quoteChar:
+            warnings.warn("quoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
+            raise SyntaxError()
+
+        if endQuoteChar is None:
+            endQuoteChar = quoteChar
+        else:
+            endQuoteChar = endQuoteChar.strip()
+            if not endQuoteChar:
+                warnings.warn("endQuoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
+                raise SyntaxError()
+
+        self.quoteChar = quoteChar
+        self.quoteCharLen = len(quoteChar)
+        self.firstQuoteChar = quoteChar[0]
+        self.endQuoteChar = endQuoteChar
+        self.endQuoteCharLen = len(endQuoteChar)
+        self.escChar = escChar
+        self.escQuote = escQuote
+        self.unquoteResults = unquoteResults
+        self.convertWhitespaceEscapes = convertWhitespaceEscapes
+
+        if multiline:
+            self.flags = re.MULTILINE | re.DOTALL
+            self.pattern = r'%s(?:[^%s%s]' % \
+                ( re.escape(self.quoteChar),
+                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
+        else:
+            self.flags = 0
+            self.pattern = r'%s(?:[^%s\n\r%s]' % \
+                ( re.escape(self.quoteChar),
+                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
+        if len(self.endQuoteChar) > 1:
+            self.pattern += (
+                '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]),
+                                               _escapeRegexRangeChars(self.endQuoteChar[i]))
+                                    for i in range(len(self.endQuoteChar)-1,0,-1)) + ')'
+                )
+        if escQuote:
+            self.pattern += (r'|(?:%s)' % re.escape(escQuote))
+        if escChar:
+            self.pattern += (r'|(?:%s.)' % re.escape(escChar))
+            self.escCharReplacePattern = re.escape(self.escChar)+"(.)"
+        self.pattern += (r')*%s' % re.escape(self.endQuoteChar))
+
+        try:
+            self.re = re.compile(self.pattern, self.flags)
+            self.reString = self.pattern
+        except sre_constants.error:
+            warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern,
+                SyntaxWarning, stacklevel=2)
+            raise
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        result = instring[loc] == self.firstQuoteChar and self.re.match(instring,loc) or None
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result.group()
+
+        if self.unquoteResults:
+
+            # strip off quotes
+            ret = ret[self.quoteCharLen:-self.endQuoteCharLen]
+
+            if isinstance(ret,basestring):
+                # replace escaped whitespace
+                if '\\' in ret and self.convertWhitespaceEscapes:
+                    ws_map = {
+                        r'\t' : '\t',
+                        r'\n' : '\n',
+                        r'\f' : '\f',
+                        r'\r' : '\r',
+                    }
+                    for wslit,wschar in ws_map.items():
+                        ret = ret.replace(wslit, wschar)
+
+                # replace escaped characters
+                if self.escChar:
+                    ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret)
+
+                # replace escaped quotes
+                if self.escQuote:
+                    ret = ret.replace(self.escQuote, self.endQuoteChar)
+
+        return loc, ret
+
+    def __str__( self ):
+        try:
+            return super(QuotedString,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar)
+
+        return self.strRepr
+
+
+class CharsNotIn(Token):
+    """
+    Token for matching words composed of characters I{not} in a given set (will
+    include whitespace in matched characters if not listed in the provided exclusion set - see example).
+    Defined with string containing all disallowed characters, and an optional
+    minimum, maximum, and/or exact length.  The default value for C{min} is 1 (a
+    minimum value < 1 is not valid); the default values for C{max} and C{exact}
+    are 0, meaning no maximum or exact length restriction.
+
+    Example::
+        # define a comma-separated-value as anything that is not a ','
+        csv_value = CharsNotIn(',')
+        print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213"))
+    prints::
+        ['dkls', 'lsdkjf', 's12 34', '@!#', '213']
+    """
+    def __init__( self, notChars, min=1, max=0, exact=0 ):
+        super(CharsNotIn,self).__init__()
+        self.skipWhitespace = False
+        self.notChars = notChars
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use Optional(CharsNotIn()) if zero-length char group is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = ( self.minLen == 0 )
+        self.mayIndexError = False
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[loc] in self.notChars:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        notchars = self.notChars
+        maxlen = min( start+self.maxLen, len(instring) )
+        while loc < maxlen and \
+              (instring[loc] not in notchars):
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__( self ):
+        try:
+            return super(CharsNotIn, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            if len(self.notChars) > 4:
+                self.strRepr = "!W:(%s...)" % self.notChars[:4]
+            else:
+                self.strRepr = "!W:(%s)" % self.notChars
+
+        return self.strRepr
+
+class White(Token):
+    """
+    Special matching class for matching whitespace.  Normally, whitespace is ignored
+    by pyparsing grammars.  This class is included when some whitespace structures
+    are significant.  Define with a string containing the whitespace characters to be
+    matched; default is C{" \\t\\r\\n"}.  Also takes optional C{min}, C{max}, and C{exact} arguments,
+    as defined for the C{L{Word}} class.
+    """
+    whiteStrs = {
+        " " : "<SPC>",
+        "\t": "<TAB>",
+        "\n": "<LF>",
+        "\r": "<CR>",
+        "\f": "<FF>",
+        }
+    def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0):
+        super(White,self).__init__()
+        self.matchWhite = ws
+        self.setWhitespaceChars( "".join(c for c in self.whiteChars if c not in self.matchWhite) )
+        #~ self.leaveWhitespace()
+        self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite))
+        self.mayReturnEmpty = True
+        self.errmsg = "Expected " + self.name
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if not(instring[ loc ] in self.matchWhite):
+            raise ParseException(instring, loc, self.errmsg, self)
+        start = loc
+        loc += 1
+        maxloc = start + self.maxLen
+        maxloc = min( maxloc, len(instring) )
+        while loc < maxloc and instring[loc] in self.matchWhite:
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+
+class _PositionToken(Token):
+    def __init__( self ):
+        super(_PositionToken,self).__init__()
+        self.name=self.__class__.__name__
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+class GoToColumn(_PositionToken):
+    """
+    Token to advance to a specific column of input text; useful for tabular report scraping.
+    """
+    def __init__( self, colno ):
+        super(GoToColumn,self).__init__()
+        self.col = colno
+
+    def preParse( self, instring, loc ):
+        if col(loc,instring) != self.col:
+            instrlen = len(instring)
+            if self.ignoreExprs:
+                loc = self._skipIgnorables( instring, loc )
+            while loc < instrlen and instring[loc].isspace() and col( loc, instring ) != self.col :
+                loc += 1
+        return loc
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        thiscol = col( loc, instring )
+        if thiscol > self.col:
+            raise ParseException( instring, loc, "Text not in expected column", self )
+        newloc = loc + self.col - thiscol
+        ret = instring[ loc: newloc ]
+        return newloc, ret
+
+
+class LineStart(_PositionToken):
+    """
+    Matches if current position is at the beginning of a line within the parse string
+    
+    Example::
+    
+        test = '''\
+        AAA this line
+        AAA and this line
+          AAA but not this one
+        B AAA and definitely not this one
+        '''
+
+        for t in (LineStart() + 'AAA' + restOfLine).searchString(test):
+            print(t)
+    
+    Prints::
+        ['AAA', ' this line']
+        ['AAA', ' and this line']    
+
+    """
+    def __init__( self ):
+        super(LineStart,self).__init__()
+        self.errmsg = "Expected start of line"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if col(loc, instring) == 1:
+            return loc, []
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class LineEnd(_PositionToken):
+    """
+    Matches if current position is at the end of a line within the parse string
+    """
+    def __init__( self ):
+        super(LineEnd,self).__init__()
+        self.setWhitespaceChars( ParserElement.DEFAULT_WHITE_CHARS.replace("\n","") )
+        self.errmsg = "Expected end of line"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc<len(instring):
+            if instring[loc] == "\n":
+                return loc+1, "\n"
+            else:
+                raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc+1, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class StringStart(_PositionToken):
+    """
+    Matches if current position is at the beginning of the parse string
+    """
+    def __init__( self ):
+        super(StringStart,self).__init__()
+        self.errmsg = "Expected start of text"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc != 0:
+            # see if entire string up to here is just whitespace and ignoreables
+            if loc != self.preParse( instring, 0 ):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class StringEnd(_PositionToken):
+    """
+    Matches if current position is at the end of the parse string
+    """
+    def __init__( self ):
+        super(StringEnd,self).__init__()
+        self.errmsg = "Expected end of text"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc < len(instring):
+            raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc+1, []
+        elif loc > len(instring):
+            return loc, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class WordStart(_PositionToken):
+    """
+    Matches if the current position is at the beginning of a Word, and
+    is not preceded by any character in a given set of C{wordChars}
+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,
+    use C{WordStart(alphanums)}. C{WordStart} will also match at the beginning of
+    the string being parsed, or at the beginning of a line.
+    """
+    def __init__(self, wordChars = printables):
+        super(WordStart,self).__init__()
+        self.wordChars = set(wordChars)
+        self.errmsg = "Not at the start of a word"
+
+    def parseImpl(self, instring, loc, doActions=True ):
+        if loc != 0:
+            if (instring[loc-1] in self.wordChars or
+                instring[loc] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class WordEnd(_PositionToken):
+    """
+    Matches if the current position is at the end of a Word, and
+    is not followed by any character in a given set of C{wordChars}
+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,
+    use C{WordEnd(alphanums)}. C{WordEnd} will also match at the end of
+    the string being parsed, or at the end of a line.
+    """
+    def __init__(self, wordChars = printables):
+        super(WordEnd,self).__init__()
+        self.wordChars = set(wordChars)
+        self.skipWhitespace = False
+        self.errmsg = "Not at the end of a word"
+
+    def parseImpl(self, instring, loc, doActions=True ):
+        instrlen = len(instring)
+        if instrlen>0 and loc<instrlen:
+            if (instring[loc] in self.wordChars or
+                instring[loc-1] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+
+class ParseExpression(ParserElement):
+    """
+    Abstract subclass of ParserElement, for combining and post-processing parsed tokens.
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(ParseExpression,self).__init__(savelist)
+        if isinstance( exprs, _generatorType ):
+            exprs = list(exprs)
+
+        if isinstance( exprs, basestring ):
+            self.exprs = [ ParserElement._literalStringClass( exprs ) ]
+        elif isinstance( exprs, Iterable ):
+            exprs = list(exprs)
+            # if sequence of strings provided, wrap with Literal
+            if all(isinstance(expr, basestring) for expr in exprs):
+                exprs = map(ParserElement._literalStringClass, exprs)
+            self.exprs = list(exprs)
+        else:
+            try:
+                self.exprs = list( exprs )
+            except TypeError:
+                self.exprs = [ exprs ]
+        self.callPreparse = False
+
+    def __getitem__( self, i ):
+        return self.exprs[i]
+
+    def append( self, other ):
+        self.exprs.append( other )
+        self.strRepr = None
+        return self
+
+    def leaveWhitespace( self ):
+        """Extends C{leaveWhitespace} defined in base class, and also invokes C{leaveWhitespace} on
+           all contained expressions."""
+        self.skipWhitespace = False
+        self.exprs = [ e.copy() for e in self.exprs ]
+        for e in self.exprs:
+            e.leaveWhitespace()
+        return self
+
+    def ignore( self, other ):
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                super( ParseExpression, self).ignore( other )
+                for e in self.exprs:
+                    e.ignore( self.ignoreExprs[-1] )
+        else:
+            super( ParseExpression, self).ignore( other )
+            for e in self.exprs:
+                e.ignore( self.ignoreExprs[-1] )
+        return self
+
+    def __str__( self ):
+        try:
+            return super(ParseExpression,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.exprs) )
+        return self.strRepr
+
+    def streamline( self ):
+        super(ParseExpression,self).streamline()
+
+        for e in self.exprs:
+            e.streamline()
+
+        # collapse nested And's of the form And( And( And( a,b), c), d) to And( a,b,c,d )
+        # but only if there are no parse actions or resultsNames on the nested And's
+        # (likewise for Or's and MatchFirst's)
+        if ( len(self.exprs) == 2 ):
+            other = self.exprs[0]
+            if ( isinstance( other, self.__class__ ) and
+                  not(other.parseAction) and
+                  other.resultsName is None and
+                  not other.debug ):
+                self.exprs = other.exprs[:] + [ self.exprs[1] ]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+            other = self.exprs[-1]
+            if ( isinstance( other, self.__class__ ) and
+                  not(other.parseAction) and
+                  other.resultsName is None and
+                  not other.debug ):
+                self.exprs = self.exprs[:-1] + other.exprs[:]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+        self.errmsg = "Expected " + _ustr(self)
+        
+        return self
+
+    def setResultsName( self, name, listAllMatches=False ):
+        ret = super(ParseExpression,self).setResultsName(name,listAllMatches)
+        return ret
+
+    def validate( self, validateTrace=[] ):
+        tmp = validateTrace[:]+[self]
+        for e in self.exprs:
+            e.validate(tmp)
+        self.checkRecursion( [] )
+        
+    def copy(self):
+        ret = super(ParseExpression,self).copy()
+        ret.exprs = [e.copy() for e in self.exprs]
+        return ret
+
+class And(ParseExpression):
+    """
+    Requires all given C{ParseExpression}s to be found in the given order.
+    Expressions may be separated by whitespace.
+    May be constructed using the C{'+'} operator.
+    May also be constructed using the C{'-'} operator, which will suppress backtracking.
+
+    Example::
+        integer = Word(nums)
+        name_expr = OneOrMore(Word(alphas))
+
+        expr = And([integer("id"),name_expr("name"),integer("age")])
+        # more easily written as:
+        expr = integer("id") + name_expr("name") + integer("age")
+    """
+
+    class _ErrorStop(Empty):
+        def __init__(self, *args, **kwargs):
+            super(And._ErrorStop,self).__init__(*args, **kwargs)
+            self.name = '-'
+            self.leaveWhitespace()
+
+    def __init__( self, exprs, savelist = True ):
+        super(And,self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.setWhitespaceChars( self.exprs[0].whiteChars )
+        self.skipWhitespace = self.exprs[0].skipWhitespace
+        self.callPreparse = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        # pass False as last arg to _parse for first element, since we already
+        # pre-parsed the string as part of our And pre-parsing
+        loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )
+        errorStop = False
+        for e in self.exprs[1:]:
+            if isinstance(e, And._ErrorStop):
+                errorStop = True
+                continue
+            if errorStop:
+                try:
+                    loc, exprtokens = e._parse( instring, loc, doActions )
+                except ParseSyntaxException:
+                    raise
+                except ParseBaseException as pe:
+                    pe.__traceback__ = None
+                    raise ParseSyntaxException._from_exception(pe)
+                except IndexError:
+                    raise ParseSyntaxException(instring, len(instring), self.errmsg, self)
+            else:
+                loc, exprtokens = e._parse( instring, loc, doActions )
+            if exprtokens or exprtokens.haskeys():
+                resultlist += exprtokens
+        return loc, resultlist
+
+    def __iadd__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #And( [ self, other ] )
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+            if not e.mayReturnEmpty:
+                break
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+
+class Or(ParseExpression):
+    """
+    Requires that at least one C{ParseExpression} is found.
+    If two expressions match, the expression that matches the longest string will be used.
+    May be constructed using the C{'^'} operator.
+
+    Example::
+        # construct Or using '^' operator
+        
+        number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789"))
+    prints::
+        [['123'], ['3.1416'], ['789']]
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(Or,self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        maxExcLoc = -1
+        maxException = None
+        matches = []
+        for e in self.exprs:
+            try:
+                loc2 = e.tryParse( instring, loc )
+            except ParseException as err:
+                err.__traceback__ = None
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring,len(instring),e.errmsg,self)
+                    maxExcLoc = len(instring)
+            else:
+                # save match among all matches, to retry longest to shortest
+                matches.append((loc2, e))
+
+        if matches:
+            matches.sort(key=lambda x: -x[0])
+            for _,e in matches:
+                try:
+                    return e._parse( instring, loc, doActions )
+                except ParseException as err:
+                    err.__traceback__ = None
+                    if err.loc > maxExcLoc:
+                        maxException = err
+                        maxExcLoc = err.loc
+
+        if maxException is not None:
+            maxException.msg = self.errmsg
+            raise maxException
+        else:
+            raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+
+    def __ixor__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #Or( [ self, other ] )
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class MatchFirst(ParseExpression):
+    """
+    Requires that at least one C{ParseExpression} is found.
+    If two expressions match, the first one listed is the one that will match.
+    May be constructed using the C{'|'} operator.
+
+    Example::
+        # construct MatchFirst using '|' operator
+        
+        # watch the order of expressions to match
+        number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]
+
+        # put more selective expression first
+        number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)
+        print(number.searchString("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(MatchFirst,self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        maxExcLoc = -1
+        maxException = None
+        for e in self.exprs:
+            try:
+                ret = e._parse( instring, loc, doActions )
+                return ret
+            except ParseException as err:
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring,len(instring),e.errmsg,self)
+                    maxExcLoc = len(instring)
+
+        # only got here if no expression matched, raise exception for match that made it the furthest
+        else:
+            if maxException is not None:
+                maxException.msg = self.errmsg
+                raise maxException
+            else:
+                raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+    def __ior__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #MatchFirst( [ self, other ] )
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class Each(ParseExpression):
+    """
+    Requires all given C{ParseExpression}s to be found, but in any order.
+    Expressions may be separated by whitespace.
+    May be constructed using the C{'&'} operator.
+
+    Example::
+        color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")
+        shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")
+        integer = Word(nums)
+        shape_attr = "shape:" + shape_type("shape")
+        posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")
+        color_attr = "color:" + color("color")
+        size_attr = "size:" + integer("size")
+
+        # use Each (using operator '&') to accept attributes in any order 
+        # (shape and posn are required, color and size are optional)
+        shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr)
+
+        shape_spec.runTests('''
+            shape: SQUARE color: BLACK posn: 100, 120
+            shape: CIRCLE size: 50 color: BLUE posn: 50,80
+            color:GREEN size:20 shape:TRIANGLE posn:20,40
+            '''
+            )
+    prints::
+        shape: SQUARE color: BLACK posn: 100, 120
+        ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]
+        - color: BLACK
+        - posn: ['100', ',', '120']
+          - x: 100
+          - y: 120
+        - shape: SQUARE
+
+
+        shape: CIRCLE size: 50 color: BLUE posn: 50,80
+        ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]
+        - color: BLUE
+        - posn: ['50', ',', '80']
+          - x: 50
+          - y: 80
+        - shape: CIRCLE
+        - size: 50
+
+
+        color: GREEN size: 20 shape: TRIANGLE posn: 20,40
+        ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]
+        - color: GREEN
+        - posn: ['20', ',', '40']
+          - x: 20
+          - y: 40
+        - shape: TRIANGLE
+        - size: 20
+    """
+    def __init__( self, exprs, savelist = True ):
+        super(Each,self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.skipWhitespace = True
+        self.initExprGroups = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.initExprGroups:
+            self.opt1map = dict((id(e.expr),e) for e in self.exprs if isinstance(e,Optional))
+            opt1 = [ e.expr for e in self.exprs if isinstance(e,Optional) ]
+            opt2 = [ e for e in self.exprs if e.mayReturnEmpty and not isinstance(e,Optional)]
+            self.optionals = opt1 + opt2
+            self.multioptionals = [ e.expr for e in self.exprs if isinstance(e,ZeroOrMore) ]
+            self.multirequired = [ e.expr for e in self.exprs if isinstance(e,OneOrMore) ]
+            self.required = [ e for e in self.exprs if not isinstance(e,(Optional,ZeroOrMore,OneOrMore)) ]
+            self.required += self.multirequired
+            self.initExprGroups = False
+        tmpLoc = loc
+        tmpReqd = self.required[:]
+        tmpOpt  = self.optionals[:]
+        matchOrder = []
+
+        keepMatching = True
+        while keepMatching:
+            tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired
+            failed = []
+            for e in tmpExprs:
+                try:
+                    tmpLoc = e.tryParse( instring, tmpLoc )
+                except ParseException:
+                    failed.append(e)
+                else:
+                    matchOrder.append(self.opt1map.get(id(e),e))
+                    if e in tmpReqd:
+                        tmpReqd.remove(e)
+                    elif e in tmpOpt:
+                        tmpOpt.remove(e)
+            if len(failed) == len(tmpExprs):
+                keepMatching = False
+
+        if tmpReqd:
+            missing = ", ".join(_ustr(e) for e in tmpReqd)
+            raise ParseException(instring,loc,"Missing one or more required elements (%s)" % missing )
+
+        # add any unmatched Optionals, in case they have default values defined
+        matchOrder += [e for e in self.exprs if isinstance(e,Optional) and e.expr in tmpOpt]
+
+        resultlist = []
+        for e in matchOrder:
+            loc,results = e._parse(instring,loc,doActions)
+            resultlist.append(results)
+
+        finalResults = sum(resultlist, ParseResults([]))
+        return loc, finalResults
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class ParseElementEnhance(ParserElement):
+    """
+    Abstract subclass of C{ParserElement}, for combining and post-processing parsed tokens.
+    """
+    def __init__( self, expr, savelist=False ):
+        super(ParseElementEnhance,self).__init__(savelist)
+        if isinstance( expr, basestring ):
+            if issubclass(ParserElement._literalStringClass, Token):
+                expr = ParserElement._literalStringClass(expr)
+            else:
+                expr = ParserElement._literalStringClass(Literal(expr))
+        self.expr = expr
+        self.strRepr = None
+        if expr is not None:
+            self.mayIndexError = expr.mayIndexError
+            self.mayReturnEmpty = expr.mayReturnEmpty
+            self.setWhitespaceChars( expr.whiteChars )
+            self.skipWhitespace = expr.skipWhitespace
+            self.saveAsList = expr.saveAsList
+            self.callPreparse = expr.callPreparse
+            self.ignoreExprs.extend(expr.ignoreExprs)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.expr is not None:
+            return self.expr._parse( instring, loc, doActions, callPreParse=False )
+        else:
+            raise ParseException("",loc,self.errmsg,self)
+
+    def leaveWhitespace( self ):
+        self.skipWhitespace = False
+        self.expr = self.expr.copy()
+        if self.expr is not None:
+            self.expr.leaveWhitespace()
+        return self
+
+    def ignore( self, other ):
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                super( ParseElementEnhance, self).ignore( other )
+                if self.expr is not None:
+                    self.expr.ignore( self.ignoreExprs[-1] )
+        else:
+            super( ParseElementEnhance, self).ignore( other )
+            if self.expr is not None:
+                self.expr.ignore( self.ignoreExprs[-1] )
+        return self
+
+    def streamline( self ):
+        super(ParseElementEnhance,self).streamline()
+        if self.expr is not None:
+            self.expr.streamline()
+        return self
+
+    def checkRecursion( self, parseElementList ):
+        if self in parseElementList:
+            raise RecursiveGrammarException( parseElementList+[self] )
+        subRecCheckList = parseElementList[:] + [ self ]
+        if self.expr is not None:
+            self.expr.checkRecursion( subRecCheckList )
+
+    def validate( self, validateTrace=[] ):
+        tmp = validateTrace[:]+[self]
+        if self.expr is not None:
+            self.expr.validate(tmp)
+        self.checkRecursion( [] )
+
+    def __str__( self ):
+        try:
+            return super(ParseElementEnhance,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None and self.expr is not None:
+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.expr) )
+        return self.strRepr
+
+
+class FollowedBy(ParseElementEnhance):
+    """
+    Lookahead matching of the given parse expression.  C{FollowedBy}
+    does I{not} advance the parsing position within the input string, it only
+    verifies that the specified parse expression matches at the current
+    position.  C{FollowedBy} always returns a null token list.
+
+    Example::
+        # use FollowedBy to match a label only if it is followed by a ':'
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        
+        OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint()
+    prints::
+        [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]
+    """
+    def __init__( self, expr ):
+        super(FollowedBy,self).__init__(expr)
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        self.expr.tryParse( instring, loc )
+        return loc, []
+
+
+class NotAny(ParseElementEnhance):
+    """
+    Lookahead to disallow matching with the given parse expression.  C{NotAny}
+    does I{not} advance the parsing position within the input string, it only
+    verifies that the specified parse expression does I{not} match at the current
+    position.  Also, C{NotAny} does I{not} skip over leading whitespace. C{NotAny}
+    always returns a null token list.  May be constructed using the '~' operator.
+
+    Example::
+        
+    """
+    def __init__( self, expr ):
+        super(NotAny,self).__init__(expr)
+        #~ self.leaveWhitespace()
+        self.skipWhitespace = False  # do NOT use self.leaveWhitespace(), don't want to propagate to exprs
+        self.mayReturnEmpty = True
+        self.errmsg = "Found unwanted token, "+_ustr(self.expr)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.expr.canParseNext(instring, loc):
+            raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "~{" + _ustr(self.expr) + "}"
+
+        return self.strRepr
+
+class _MultipleMatch(ParseElementEnhance):
+    def __init__( self, expr, stopOn=None):
+        super(_MultipleMatch, self).__init__(expr)
+        self.saveAsList = True
+        ender = stopOn
+        if isinstance(ender, basestring):
+            ender = ParserElement._literalStringClass(ender)
+        self.not_ender = ~ender if ender is not None else None
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        self_expr_parse = self.expr._parse
+        self_skip_ignorables = self._skipIgnorables
+        check_ender = self.not_ender is not None
+        if check_ender:
+            try_not_ender = self.not_ender.tryParse
+        
+        # must be at least one (but first see if we are the stopOn sentinel;
+        # if so, fail)
+        if check_ender:
+            try_not_ender(instring, loc)
+        loc, tokens = self_expr_parse( instring, loc, doActions, callPreParse=False )
+        try:
+            hasIgnoreExprs = (not not self.ignoreExprs)
+            while 1:
+                if check_ender:
+                    try_not_ender(instring, loc)
+                if hasIgnoreExprs:
+                    preloc = self_skip_ignorables( instring, loc )
+                else:
+                    preloc = loc
+                loc, tmptokens = self_expr_parse( instring, preloc, doActions )
+                if tmptokens or tmptokens.haskeys():
+                    tokens += tmptokens
+        except (ParseException,IndexError):
+            pass
+
+        return loc, tokens
+        
+class OneOrMore(_MultipleMatch):
+    """
+    Repetition of one or more of the given expression.
+    
+    Parameters:
+     - expr - expression that must match one or more times
+     - stopOn - (default=C{None}) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition 
+          expression)          
+
+    Example::
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: BLACK"
+        OneOrMore(attr_expr).parseString(text).pprint()  # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]
+
+        # use stopOn attribute for OneOrMore to avoid reading label string as part of the data
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]
+        
+        # could also be written as
+        (attr_expr * (1,)).parseString(text).pprint()
+    """
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + _ustr(self.expr) + "}..."
+
+        return self.strRepr
+
+class ZeroOrMore(_MultipleMatch):
+    """
+    Optional repetition of zero or more of the given expression.
+    
+    Parameters:
+     - expr - expression that must match zero or more times
+     - stopOn - (default=C{None}) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition 
+          expression)          
+
+    Example: similar to L{OneOrMore}
+    """
+    def __init__( self, expr, stopOn=None):
+        super(ZeroOrMore,self).__init__(expr, stopOn=stopOn)
+        self.mayReturnEmpty = True
+        
+    def parseImpl( self, instring, loc, doActions=True ):
+        try:
+            return super(ZeroOrMore, self).parseImpl(instring, loc, doActions)
+        except (ParseException,IndexError):
+            return loc, []
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]..."
+
+        return self.strRepr
+
+class _NullToken(object):
+    def __bool__(self):
+        return False
+    __nonzero__ = __bool__
+    def __str__(self):
+        return ""
+
+_optionalNotMatched = _NullToken()
+class Optional(ParseElementEnhance):
+    """
+    Optional matching of the given expression.
+
+    Parameters:
+     - expr - expression that must match zero or more times
+     - default (optional) - value to be returned if the optional expression is not found.
+
+    Example::
+        # US postal code can be a 5-digit zip, plus optional 4-digit qualifier
+        zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4)))
+        zip.runTests('''
+            # traditional ZIP code
+            12345
+            
+            # ZIP+4 form
+            12101-0001
+            
+            # invalid ZIP
+            98765-
+            ''')
+    prints::
+        # traditional ZIP code
+        12345
+        ['12345']
+
+        # ZIP+4 form
+        12101-0001
+        ['12101-0001']
+
+        # invalid ZIP
+        98765-
+             ^
+        FAIL: Expected end of text (at char 5), (line:1, col:6)
+    """
+    def __init__( self, expr, default=_optionalNotMatched ):
+        super(Optional,self).__init__( expr, savelist=False )
+        self.saveAsList = self.expr.saveAsList
+        self.defaultValue = default
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        try:
+            loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False )
+        except (ParseException,IndexError):
+            if self.defaultValue is not _optionalNotMatched:
+                if self.expr.resultsName:
+                    tokens = ParseResults([ self.defaultValue ])
+                    tokens[self.expr.resultsName] = self.defaultValue
+                else:
+                    tokens = [ self.defaultValue ]
+            else:
+                tokens = []
+        return loc, tokens
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]"
+
+        return self.strRepr
+
+class SkipTo(ParseElementEnhance):
+    """
+    Token for skipping over all undefined text until the matched expression is found.
+
+    Parameters:
+     - expr - target expression marking the end of the data to be skipped
+     - include - (default=C{False}) if True, the target expression is also parsed 
+          (the skipped text and target expression are returned as a 2-element list).
+     - ignore - (default=C{None}) used to define grammars (typically quoted strings and 
+          comments) that might contain false matches to the target expression
+     - failOn - (default=C{None}) define expressions that are not allowed to be 
+          included in the skipped test; if found before the target expression is found, 
+          the SkipTo is not a match
+
+    Example::
+        report = '''
+            Outstanding Issues Report - 1 Jan 2000
+
+               # | Severity | Description                               |  Days Open
+            -----+----------+-------------------------------------------+-----------
+             101 | Critical | Intermittent system crash                 |          6
+              94 | Cosmetic | Spelling error on Login ('log|n')         |         14
+              79 | Minor    | System slow when running too many reports |         47
+            '''
+        integer = Word(nums)
+        SEP = Suppress('|')
+        # use SkipTo to simply match everything up until the next SEP
+        # - ignore quoted strings, so that a '|' character inside a quoted string does not match
+        # - parse action will call token.strip() for each matched token, i.e., the description body
+        string_data = SkipTo(SEP, ignore=quotedString)
+        string_data.setParseAction(tokenMap(str.strip))
+        ticket_expr = (integer("issue_num") + SEP 
+                      + string_data("sev") + SEP 
+                      + string_data("desc") + SEP 
+                      + integer("days_open"))
+        
+        for tkt in ticket_expr.searchString(report):
+            print tkt.dump()
+    prints::
+        ['101', 'Critical', 'Intermittent system crash', '6']
+        - days_open: 6
+        - desc: Intermittent system crash
+        - issue_num: 101
+        - sev: Critical
+        ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']
+        - days_open: 14
+        - desc: Spelling error on Login ('log|n')
+        - issue_num: 94
+        - sev: Cosmetic
+        ['79', 'Minor', 'System slow when running too many reports', '47']
+        - days_open: 47
+        - desc: System slow when running too many reports
+        - issue_num: 79
+        - sev: Minor
+    """
+    def __init__( self, other, include=False, ignore=None, failOn=None ):
+        super( SkipTo, self ).__init__( other )
+        self.ignoreExpr = ignore
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.includeMatch = include
+        self.asList = False
+        if isinstance(failOn, basestring):
+            self.failOn = ParserElement._literalStringClass(failOn)
+        else:
+            self.failOn = failOn
+        self.errmsg = "No match found for "+_ustr(self.expr)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        startloc = loc
+        instrlen = len(instring)
+        expr = self.expr
+        expr_parse = self.expr._parse
+        self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None
+        self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None
+        
+        tmploc = loc
+        while tmploc <= instrlen:
+            if self_failOn_canParseNext is not None:
+                # break if failOn expression matches
+                if self_failOn_canParseNext(instring, tmploc):
+                    break
+                    
+            if self_ignoreExpr_tryParse is not None:
+                # advance past ignore expressions
+                while 1:
+                    try:
+                        tmploc = self_ignoreExpr_tryParse(instring, tmploc)
+                    except ParseBaseException:
+                        break
+            
+            try:
+                expr_parse(instring, tmploc, doActions=False, callPreParse=False)
+            except (ParseException, IndexError):
+                # no match, advance loc in string
+                tmploc += 1
+            else:
+                # matched skipto expr, done
+                break
+
+        else:
+            # ran off the end of the input string without matching skipto expr, fail
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        # build up return values
+        loc = tmploc
+        skiptext = instring[startloc:loc]
+        skipresult = ParseResults(skiptext)
+        
+        if self.includeMatch:
+            loc, mat = expr_parse(instring,loc,doActions,callPreParse=False)
+            skipresult += mat
+
+        return loc, skipresult
+
+class Forward(ParseElementEnhance):
+    """
+    Forward declaration of an expression to be defined later -
+    used for recursive grammars, such as algebraic infix notation.
+    When the expression is known, it is assigned to the C{Forward} variable using the '<<' operator.
+
+    Note: take care when assigning to C{Forward} not to overlook precedence of operators.
+    Specifically, '|' has a lower precedence than '<<', so that::
+        fwdExpr << a | b | c
+    will actually be evaluated as::
+        (fwdExpr << a) | b | c
+    thereby leaving b and c out as parseable alternatives.  It is recommended that you
+    explicitly group the values inserted into the C{Forward}::
+        fwdExpr << (a | b | c)
+    Converting to use the '<<=' operator instead will avoid this problem.
+
+    See L{ParseResults.pprint} for an example of a recursive parser created using
+    C{Forward}.
+    """
+    def __init__( self, other=None ):
+        super(Forward,self).__init__( other, savelist=False )
+
+    def __lshift__( self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass(other)
+        self.expr = other
+        self.strRepr = None
+        self.mayIndexError = self.expr.mayIndexError
+        self.mayReturnEmpty = self.expr.mayReturnEmpty
+        self.setWhitespaceChars( self.expr.whiteChars )
+        self.skipWhitespace = self.expr.skipWhitespace
+        self.saveAsList = self.expr.saveAsList
+        self.ignoreExprs.extend(self.expr.ignoreExprs)
+        return self
+        
+    def __ilshift__(self, other):
+        return self << other
+    
+    def leaveWhitespace( self ):
+        self.skipWhitespace = False
+        return self
+
+    def streamline( self ):
+        if not self.streamlined:
+            self.streamlined = True
+            if self.expr is not None:
+                self.expr.streamline()
+        return self
+
+    def validate( self, validateTrace=[] ):
+        if self not in validateTrace:
+            tmp = validateTrace[:]+[self]
+            if self.expr is not None:
+                self.expr.validate(tmp)
+        self.checkRecursion([])
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+        return self.__class__.__name__ + ": ..."
+
+        # stubbed out for now - creates awful memory and perf issues
+        self._revertClass = self.__class__
+        self.__class__ = _ForwardNoRecurse
+        try:
+            if self.expr is not None:
+                retString = _ustr(self.expr)
+            else:
+                retString = "None"
+        finally:
+            self.__class__ = self._revertClass
+        return self.__class__.__name__ + ": " + retString
+
+    def copy(self):
+        if self.expr is not None:
+            return super(Forward,self).copy()
+        else:
+            ret = Forward()
+            ret <<= self
+            return ret
+
+class _ForwardNoRecurse(Forward):
+    def __str__( self ):
+        return "..."
+
+class TokenConverter(ParseElementEnhance):
+    """
+    Abstract subclass of C{ParseExpression}, for converting parsed results.
+    """
+    def __init__( self, expr, savelist=False ):
+        super(TokenConverter,self).__init__( expr )#, savelist )
+        self.saveAsList = False
+
+class Combine(TokenConverter):
+    """
+    Converter to concatenate all matching tokens to a single string.
+    By default, the matching patterns must also be contiguous in the input string;
+    this can be disabled by specifying C{'adjacent=False'} in the constructor.
+
+    Example::
+        real = Word(nums) + '.' + Word(nums)
+        print(real.parseString('3.1416')) # -> ['3', '.', '1416']
+        # will also erroneously match the following
+        print(real.parseString('3. 1416')) # -> ['3', '.', '1416']
+
+        real = Combine(Word(nums) + '.' + Word(nums))
+        print(real.parseString('3.1416')) # -> ['3.1416']
+        # no match when there are internal spaces
+        print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...)
+    """
+    def __init__( self, expr, joinString="", adjacent=True ):
+        super(Combine,self).__init__( expr )
+        # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself
+        if adjacent:
+            self.leaveWhitespace()
+        self.adjacent = adjacent
+        self.skipWhitespace = True
+        self.joinString = joinString
+        self.callPreparse = True
+
+    def ignore( self, other ):
+        if self.adjacent:
+            ParserElement.ignore(self, other)
+        else:
+            super( Combine, self).ignore( other )
+        return self
+
+    def postParse( self, instring, loc, tokenlist ):
+        retToks = tokenlist.copy()
+        del retToks[:]
+        retToks += ParseResults([ "".join(tokenlist._asStringList(self.joinString)) ], modal=self.modalResults)
+
+        if self.resultsName and retToks.haskeys():
+            return [ retToks ]
+        else:
+            return retToks
+
+class Group(TokenConverter):
+    """
+    Converter to return the matched tokens as a list - useful for returning tokens of C{L{ZeroOrMore}} and C{L{OneOrMore}} expressions.
+
+    Example::
+        ident = Word(alphas)
+        num = Word(nums)
+        term = ident | num
+        func = ident + Optional(delimitedList(term))
+        print(func.parseString("fn a,b,100"))  # -> ['fn', 'a', 'b', '100']
+
+        func = ident + Group(Optional(delimitedList(term)))
+        print(func.parseString("fn a,b,100"))  # -> ['fn', ['a', 'b', '100']]
+    """
+    def __init__( self, expr ):
+        super(Group,self).__init__( expr )
+        self.saveAsList = True
+
+    def postParse( self, instring, loc, tokenlist ):
+        return [ tokenlist ]
+
+class Dict(TokenConverter):
+    """
+    Converter to return a repetitive expression as a list, but also as a dictionary.
+    Each element can also be referenced using the first token in the expression as its key.
+    Useful for tabular report scraping when the first column can be used as a item key.
+
+    Example::
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        
+        # print attributes as plain groups
+        print(OneOrMore(attr_expr).parseString(text).dump())
+        
+        # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names
+        result = Dict(OneOrMore(Group(attr_expr))).parseString(text)
+        print(result.dump())
+        
+        # access named fields as dict entries, or output as dict
+        print(result['shape'])        
+        print(result.asDict())
+    prints::
+        ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']
+
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}
+    See more examples at L{ParseResults} of accessing fields by results name.
+    """
+    def __init__( self, expr ):
+        super(Dict,self).__init__( expr )
+        self.saveAsList = True
+
+    def postParse( self, instring, loc, tokenlist ):
+        for i,tok in enumerate(tokenlist):
+            if len(tok) == 0:
+                continue
+            ikey = tok[0]
+            if isinstance(ikey,int):
+                ikey = _ustr(tok[0]).strip()
+            if len(tok)==1:
+                tokenlist[ikey] = _ParseResultsWithOffset("",i)
+            elif len(tok)==2 and not isinstance(tok[1],ParseResults):
+                tokenlist[ikey] = _ParseResultsWithOffset(tok[1],i)
+            else:
+                dictvalue = tok.copy() #ParseResults(i)
+                del dictvalue[0]
+                if len(dictvalue)!= 1 or (isinstance(dictvalue,ParseResults) and dictvalue.haskeys()):
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue,i)
+                else:
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0],i)
+
+        if self.resultsName:
+            return [ tokenlist ]
+        else:
+            return tokenlist
+
+
+class Suppress(TokenConverter):
+    """
+    Converter for ignoring the results of a parsed expression.
+
+    Example::
+        source = "a, b, c,d"
+        wd = Word(alphas)
+        wd_list1 = wd + ZeroOrMore(',' + wd)
+        print(wd_list1.parseString(source))
+
+        # often, delimiters that are useful during parsing are just in the
+        # way afterward - use Suppress to keep them out of the parsed output
+        wd_list2 = wd + ZeroOrMore(Suppress(',') + wd)
+        print(wd_list2.parseString(source))
+    prints::
+        ['a', ',', 'b', ',', 'c', ',', 'd']
+        ['a', 'b', 'c', 'd']
+    (See also L{delimitedList}.)
+    """
+    def postParse( self, instring, loc, tokenlist ):
+        return []
+
+    def suppress( self ):
+        return self
+
+
+class OnlyOnce(object):
+    """
+    Wrapper for parse actions, to ensure they are only called once.
+    """
+    def __init__(self, methodCall):
+        self.callable = _trim_arity(methodCall)
+        self.called = False
+    def __call__(self,s,l,t):
+        if not self.called:
+            results = self.callable(s,l,t)
+            self.called = True
+            return results
+        raise ParseException(s,l,"")
+    def reset(self):
+        self.called = False
+
+def traceParseAction(f):
+    """
+    Decorator for debugging parse actions. 
+    
+    When the parse action is called, this decorator will print C{">> entering I{method-name}(line:I{current_source_line}, I{parse_location}, I{matched_tokens})".}
+    When the parse action completes, the decorator will print C{"<<"} followed by the returned value, or any exception that the parse action raised.
+
+    Example::
+        wd = Word(alphas)
+
+        @traceParseAction
+        def remove_duplicate_chars(tokens):
+            return ''.join(sorted(set(''.join(tokens))))
+
+        wds = OneOrMore(wd).setParseAction(remove_duplicate_chars)
+        print(wds.parseString("slkdjs sld sldd sdlf sdljf"))
+    prints::
+        >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))
+        <<leaving remove_duplicate_chars (ret: 'dfjkls')
+        ['dfjkls']
+    """
+    f = _trim_arity(f)
+    def z(*paArgs):
+        thisFunc = f.__name__
+        s,l,t = paArgs[-3:]
+        if len(paArgs)>3:
+            thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc
+        sys.stderr.write( ">>entering %s(line: '%s', %d, %r)\n" % (thisFunc,line(l,s),l,t) )
+        try:
+            ret = f(*paArgs)
+        except Exception as exc:
+            sys.stderr.write( "<<leaving %s (exception: %s)\n" % (thisFunc,exc) )
+            raise
+        sys.stderr.write( "<<leaving %s (ret: %r)\n" % (thisFunc,ret) )
+        return ret
+    try:
+        z.__name__ = f.__name__
+    except AttributeError:
+        pass
+    return z
+
+#
+# global helpers
+#
+def delimitedList( expr, delim=",", combine=False ):
+    """
+    Helper to define a delimited list of expressions - the delimiter defaults to ','.
+    By default, the list elements and delimiters can have intervening whitespace, and
+    comments, but this can be overridden by passing C{combine=True} in the constructor.
+    If C{combine} is set to C{True}, the matching tokens are returned as a single token
+    string, with the delimiters included; otherwise, the matching tokens are returned
+    as a list of tokens, with the delimiters suppressed.
+
+    Example::
+        delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc']
+        delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']
+    """
+    dlName = _ustr(expr)+" ["+_ustr(delim)+" "+_ustr(expr)+"]..."
+    if combine:
+        return Combine( expr + ZeroOrMore( delim + expr ) ).setName(dlName)
+    else:
+        return ( expr + ZeroOrMore( Suppress( delim ) + expr ) ).setName(dlName)
+
+def countedArray( expr, intExpr=None ):
+    """
+    Helper to define a counted list of expressions.
+    This helper defines a pattern of the form::
+        integer expr expr expr...
+    where the leading integer tells how many expr expressions follow.
+    The matched tokens returns the array of expr tokens as a list - the leading count token is suppressed.
+    
+    If C{intExpr} is specified, it should be a pyparsing expression that produces an integer value.
+
+    Example::
+        countedArray(Word(alphas)).parseString('2 ab cd ef')  # -> ['ab', 'cd']
+
+        # in this parser, the leading integer value is given in binary,
+        # '10' indicating that 2 values are in the array
+        binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2))
+        countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef')  # -> ['ab', 'cd']
+    """
+    arrayExpr = Forward()
+    def countFieldParseAction(s,l,t):
+        n = t[0]
+        arrayExpr << (n and Group(And([expr]*n)) or Group(empty))
+        return []
+    if intExpr is None:
+        intExpr = Word(nums).setParseAction(lambda t:int(t[0]))
+    else:
+        intExpr = intExpr.copy()
+    intExpr.setName("arrayLen")
+    intExpr.addParseAction(countFieldParseAction, callDuringTry=True)
+    return ( intExpr + arrayExpr ).setName('(len) ' + _ustr(expr) + '...')
+
+def _flatten(L):
+    ret = []
+    for i in L:
+        if isinstance(i,list):
+            ret.extend(_flatten(i))
+        else:
+            ret.append(i)
+    return ret
+
+def matchPreviousLiteral(expr):
+    """
+    Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks
+    for a 'repeat' of a previous expression.  For example::
+        first = Word(nums)
+        second = matchPreviousLiteral(first)
+        matchExpr = first + ":" + second
+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches a
+    previous literal, will also match the leading C{"1:1"} in C{"1:10"}.
+    If this is not desired, use C{matchPreviousExpr}.
+    Do I{not} use with packrat parsing enabled.
+    """
+    rep = Forward()
+    def copyTokenToRepeater(s,l,t):
+        if t:
+            if len(t) == 1:
+                rep << t[0]
+            else:
+                # flatten t tokens
+                tflat = _flatten(t.asList())
+                rep << And(Literal(tt) for tt in tflat)
+        else:
+            rep << Empty()
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def matchPreviousExpr(expr):
+    """
+    Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks
+    for a 'repeat' of a previous expression.  For example::
+        first = Word(nums)
+        second = matchPreviousExpr(first)
+        matchExpr = first + ":" + second
+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches by
+    expressions, will I{not} match the leading C{"1:1"} in C{"1:10"};
+    the expressions are evaluated first, and then compared, so
+    C{"1"} is compared with C{"10"}.
+    Do I{not} use with packrat parsing enabled.
+    """
+    rep = Forward()
+    e2 = expr.copy()
+    rep <<= e2
+    def copyTokenToRepeater(s,l,t):
+        matchTokens = _flatten(t.asList())
+        def mustMatchTheseTokens(s,l,t):
+            theseTokens = _flatten(t.asList())
+            if  theseTokens != matchTokens:
+                raise ParseException("",0,"")
+        rep.setParseAction( mustMatchTheseTokens, callDuringTry=True )
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def _escapeRegexRangeChars(s):
+    #~  escape these chars: ^-]
+    for c in r"\^-]":
+        s = s.replace(c,_bslash+c)
+    s = s.replace("\n",r"\n")
+    s = s.replace("\t",r"\t")
+    return _ustr(s)
+
+def oneOf( strs, caseless=False, useRegex=True ):
+    """
+    Helper to quickly define a set of alternative Literals, and makes sure to do
+    longest-first testing when there is a conflict, regardless of the input order,
+    but returns a C{L{MatchFirst}} for best performance.
+
+    Parameters:
+     - strs - a string of space-delimited literals, or a collection of string literals
+     - caseless - (default=C{False}) - treat all literals as caseless
+     - useRegex - (default=C{True}) - as an optimization, will generate a Regex
+          object; otherwise, will generate a C{MatchFirst} object (if C{caseless=True}, or
+          if creating a C{Regex} raises an exception)
+
+    Example::
+        comp_oper = oneOf("< = > <= >= !=")
+        var = Word(alphas)
+        number = Word(nums)
+        term = var | number
+        comparison_expr = term + comp_oper + term
+        print(comparison_expr.searchString("B = 12  AA=23 B<=AA AA>12"))
+    prints::
+        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]
+    """
+    if caseless:
+        isequal = ( lambda a,b: a.upper() == b.upper() )
+        masks = ( lambda a,b: b.upper().startswith(a.upper()) )
+        parseElementClass = CaselessLiteral
+    else:
+        isequal = ( lambda a,b: a == b )
+        masks = ( lambda a,b: b.startswith(a) )
+        parseElementClass = Literal
+
+    symbols = []
+    if isinstance(strs,basestring):
+        symbols = strs.split()
+    elif isinstance(strs, Iterable):
+        symbols = list(strs)
+    else:
+        warnings.warn("Invalid argument to oneOf, expected string or iterable",
+                SyntaxWarning, stacklevel=2)
+    if not symbols:
+        return NoMatch()
+
+    i = 0
+    while i < len(symbols)-1:
+        cur = symbols[i]
+        for j,other in enumerate(symbols[i+1:]):
+            if ( isequal(other, cur) ):
+                del symbols[i+j+1]
+                break
+            elif ( masks(cur, other) ):
+                del symbols[i+j+1]
+                symbols.insert(i,other)
+                cur = other
+                break
+        else:
+            i += 1
+
+    if not caseless and useRegex:
+        #~ print (strs,"->", "|".join( [ _escapeRegexChars(sym) for sym in symbols] ))
+        try:
+            if len(symbols)==len("".join(symbols)):
+                return Regex( "[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols) ).setName(' | '.join(symbols))
+            else:
+                return Regex( "|".join(re.escape(sym) for sym in symbols) ).setName(' | '.join(symbols))
+        except Exception:
+            warnings.warn("Exception creating Regex for oneOf, building MatchFirst",
+                    SyntaxWarning, stacklevel=2)
+
+
+    # last resort, just use MatchFirst
+    return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols))
+
+def dictOf( key, value ):
+    """
+    Helper to easily and clearly define a dictionary by specifying the respective patterns
+    for the key and value.  Takes care of defining the C{L{Dict}}, C{L{ZeroOrMore}}, and C{L{Group}} tokens
+    in the proper order.  The key pattern can include delimiting markers or punctuation,
+    as long as they are suppressed, thereby leaving the significant key text.  The value
+    pattern can include named results, so that the C{Dict} results can include named token
+    fields.
+
+    Example::
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        print(OneOrMore(attr_expr).parseString(text).dump())
+        
+        attr_label = label
+        attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)
+
+        # similar to Dict, but simpler call format
+        result = dictOf(attr_label, attr_value).parseString(text)
+        print(result.dump())
+        print(result['shape'])
+        print(result.shape)  # object attribute access works too
+        print(result.asDict())
+    prints::
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        SQUARE
+        {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}
+    """
+    return Dict( ZeroOrMore( Group ( key + value ) ) )
+
+def originalTextFor(expr, asString=True):
+    """
+    Helper to return the original, untokenized text for a given expression.  Useful to
+    restore the parsed fields of an HTML start tag into the raw tag text itself, or to
+    revert separate tokens with intervening whitespace back to the original matching
+    input text. By default, returns astring containing the original parsed text.  
+       
+    If the optional C{asString} argument is passed as C{False}, then the return value is a 
+    C{L{ParseResults}} containing any results names that were originally matched, and a 
+    single token containing the original matched text from the input string.  So if 
+    the expression passed to C{L{originalTextFor}} contains expressions with defined
+    results names, you must set C{asString} to C{False} if you want to preserve those
+    results name values.
+
+    Example::
+        src = "this is test <b> bold <i>text</i> </b> normal text "
+        for tag in ("b","i"):
+            opener,closer = makeHTMLTags(tag)
+            patt = originalTextFor(opener + SkipTo(closer) + closer)
+            print(patt.searchString(src)[0])
+    prints::
+        ['<b> bold <i>text</i> </b>']
+        ['<i>text</i>']
+    """
+    locMarker = Empty().setParseAction(lambda s,loc,t: loc)
+    endlocMarker = locMarker.copy()
+    endlocMarker.callPreparse = False
+    matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end")
+    if asString:
+        extractText = lambda s,l,t: s[t._original_start:t._original_end]
+    else:
+        def extractText(s,l,t):
+            t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]]
+    matchExpr.setParseAction(extractText)
+    matchExpr.ignoreExprs = expr.ignoreExprs
+    return matchExpr
+
+def ungroup(expr): 
+    """
+    Helper to undo pyparsing's default grouping of And expressions, even
+    if all but one are non-empty.
+    """
+    return TokenConverter(expr).setParseAction(lambda t:t[0])
+
+def locatedExpr(expr):
+    """
+    Helper to decorate a returned token with its starting and ending locations in the input string.
+    This helper adds the following results names:
+     - locn_start = location where matched expression begins
+     - locn_end = location where matched expression ends
+     - value = the actual parsed results
+
+    Be careful if the input text contains C{<TAB>} characters, you may want to call
+    C{L{ParserElement.parseWithTabs}}
+
+    Example::
+        wd = Word(alphas)
+        for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):
+            print(match)
+    prints::
+        [[0, 'ljsdf', 5]]
+        [[8, 'lksdjjf', 15]]
+        [[18, 'lkkjj', 23]]
+    """
+    locator = Empty().setParseAction(lambda s,l,t: l)
+    return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end"))
+
+
+# convenience constants for positional expressions
+empty       = Empty().setName("empty")
+lineStart   = LineStart().setName("lineStart")
+lineEnd     = LineEnd().setName("lineEnd")
+stringStart = StringStart().setName("stringStart")
+stringEnd   = StringEnd().setName("stringEnd")
+
+_escapedPunc = Word( _bslash, r"\[]-*.$+^?()~ ", exact=2 ).setParseAction(lambda s,l,t:t[0][1])
+_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s,l,t:unichr(int(t[0].lstrip(r'\0x'),16)))
+_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s,l,t:unichr(int(t[0][1:],8)))
+_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1)
+_charRange = Group(_singleChar + Suppress("-") + _singleChar)
+_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group( OneOrMore( _charRange | _singleChar ) ).setResultsName("body") + "]"
+
+def srange(s):
+    r"""
+    Helper to easily define string ranges for use in Word construction.  Borrows
+    syntax from regexp '[]' string range definitions::
+        srange("[0-9]")   -> "0123456789"
+        srange("[a-z]")   -> "abcdefghijklmnopqrstuvwxyz"
+        srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
+    The input string must be enclosed in []'s, and the returned string is the expanded
+    character set joined into a single string.
+    The values enclosed in the []'s may be:
+     - a single character
+     - an escaped character with a leading backslash (such as C{\-} or C{\]})
+     - an escaped hex character with a leading C{'\x'} (C{\x21}, which is a C{'!'} character) 
+         (C{\0x##} is also supported for backwards compatibility) 
+     - an escaped octal character with a leading C{'\0'} (C{\041}, which is a C{'!'} character)
+     - a range of any of the above, separated by a dash (C{'a-z'}, etc.)
+     - any combination of the above (C{'aeiouy'}, C{'a-zA-Z0-9_$'}, etc.)
+    """
+    _expanded = lambda p: p if not isinstance(p,ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]),ord(p[1])+1))
+    try:
+        return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body)
+    except Exception:
+        return ""
+
+def matchOnlyAtCol(n):
+    """
+    Helper method for defining parse actions that require matching at a specific
+    column in the input text.
+    """
+    def verifyCol(strg,locn,toks):
+        if col(locn,strg) != n:
+            raise ParseException(strg,locn,"matched token not at column %d" % n)
+    return verifyCol
+
+def replaceWith(replStr):
+    """
+    Helper method for common parse actions that simply return a literal value.  Especially
+    useful when used with C{L{transformString<ParserElement.transformString>}()}.
+
+    Example::
+        num = Word(nums).setParseAction(lambda toks: int(toks[0]))
+        na = oneOf("N/A NA").setParseAction(replaceWith(math.nan))
+        term = na | num
+        
+        OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234]
+    """
+    return lambda s,l,t: [replStr]
+
+def removeQuotes(s,l,t):
+    """
+    Helper parse action for removing quotation marks from parsed quoted strings.
+
+    Example::
+        # by default, quotation marks are included in parsed results
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]
+
+        # use removeQuotes to strip quotation marks from parsed results
+        quotedString.setParseAction(removeQuotes)
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]
+    """
+    return t[0][1:-1]
+
+def tokenMap(func, *args):
+    """
+    Helper to define a parse action by mapping a function to all elements of a ParseResults list.If any additional 
+    args are passed, they are forwarded to the given function as additional arguments after
+    the token, as in C{hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))}, which will convert the
+    parsed data to an integer using base 16.
+
+    Example (compare the last to example in L{ParserElement.transformString}::
+        hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16))
+        hex_ints.runTests('''
+            00 11 22 aa FF 0a 0d 1a
+            ''')
+        
+        upperword = Word(alphas).setParseAction(tokenMap(str.upper))
+        OneOrMore(upperword).runTests('''
+            my kingdom for a horse
+            ''')
+
+        wd = Word(alphas).setParseAction(tokenMap(str.title))
+        OneOrMore(wd).setParseAction(' '.join).runTests('''
+            now is the winter of our discontent made glorious summer by this sun of york
+            ''')
+    prints::
+        00 11 22 aa FF 0a 0d 1a
+        [0, 17, 34, 170, 255, 10, 13, 26]
+
+        my kingdom for a horse
+        ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']
+
+        now is the winter of our discontent made glorious summer by this sun of york
+        ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']
+    """
+    def pa(s,l,t):
+        return [func(tokn, *args) for tokn in t]
+
+    try:
+        func_name = getattr(func, '__name__', 
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    pa.__name__ = func_name
+
+    return pa
+
+upcaseTokens = tokenMap(lambda t: _ustr(t).upper())
+"""(Deprecated) Helper parse action to convert tokens to upper case. Deprecated in favor of L{pyparsing_common.upcaseTokens}"""
+
+downcaseTokens = tokenMap(lambda t: _ustr(t).lower())
+"""(Deprecated) Helper parse action to convert tokens to lower case. Deprecated in favor of L{pyparsing_common.downcaseTokens}"""
+    
+def _makeTags(tagStr, xml):
+    """Internal helper to construct opening and closing tag expressions, given a tag name"""
+    if isinstance(tagStr,basestring):
+        resname = tagStr
+        tagStr = Keyword(tagStr, caseless=not xml)
+    else:
+        resname = tagStr.name
+
+    tagAttrName = Word(alphas,alphanums+"_-:")
+    if (xml):
+        tagAttrValue = dblQuotedString.copy().setParseAction( removeQuotes )
+        openTag = Suppress("<") + tagStr("tag") + \
+                Dict(ZeroOrMore(Group( tagAttrName + Suppress("=") + tagAttrValue ))) + \
+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
+    else:
+        printablesLessRAbrack = "".join(c for c in printables if c not in ">")
+        tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printablesLessRAbrack)
+        openTag = Suppress("<") + tagStr("tag") + \
+                Dict(ZeroOrMore(Group( tagAttrName.setParseAction(downcaseTokens) + \
+                Optional( Suppress("=") + tagAttrValue ) ))) + \
+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
+    closeTag = Combine(_L("</") + tagStr + ">")
+
+    openTag = openTag.setResultsName("start"+"".join(resname.replace(":"," ").title().split())).setName("<%s>" % resname)
+    closeTag = closeTag.setResultsName("end"+"".join(resname.replace(":"," ").title().split())).setName("</%s>" % resname)
+    openTag.tag = resname
+    closeTag.tag = resname
+    return openTag, closeTag
+
+def makeHTMLTags(tagStr):
+    """
+    Helper to construct opening and closing tag expressions for HTML, given a tag name. Matches
+    tags in either upper or lower case, attributes with namespaces and with quoted or unquoted values.
+
+    Example::
+        text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'
+        # makeHTMLTags returns pyparsing expressions for the opening and closing tags as a 2-tuple
+        a,a_end = makeHTMLTags("A")
+        link_expr = a + SkipTo(a_end)("link_text") + a_end
+        
+        for link in link_expr.searchString(text):
+            # attributes in the <A> tag (like "href" shown here) are also accessible as named results
+            print(link.link_text, '->', link.href)
+    prints::
+        pyparsing -> http://pyparsing.wikispaces.com
+    """
+    return _makeTags( tagStr, False )
+
+def makeXMLTags(tagStr):
+    """
+    Helper to construct opening and closing tag expressions for XML, given a tag name. Matches
+    tags only in the given upper/lower case.
+
+    Example: similar to L{makeHTMLTags}
+    """
+    return _makeTags( tagStr, True )
+
+def withAttribute(*args,**attrDict):
+    """
+    Helper to create a validating parse action to be used with start tags created
+    with C{L{makeXMLTags}} or C{L{makeHTMLTags}}. Use C{withAttribute} to qualify a starting tag
+    with a required attribute value, to avoid false matches on common tags such as
+    C{<TD>} or C{<DIV>}.
+
+    Call C{withAttribute} with a series of attribute names and values. Specify the list
+    of filter attributes names and values as:
+     - keyword arguments, as in C{(align="right")}, or
+     - as an explicit dict with C{**} operator, when an attribute name is also a Python
+          reserved word, as in C{**{"class":"Customer", "align":"right"}}
+     - a list of name-value tuples, as in ( ("ns1:class", "Customer"), ("ns2:align","right") )
+    For attribute names with a namespace prefix, you must use the second form.  Attribute
+    names are matched insensitive to upper/lower case.
+       
+    If just testing for C{class} (with or without a namespace), use C{L{withClass}}.
+
+    To verify that the attribute exists, but without specifying a value, pass
+    C{withAttribute.ANY_VALUE} as the value.
+
+    Example::
+        html = '''
+            <div>
+            Some text
+            <div type="grid">1 4 0 1 0</div>
+            <div type="graph">1,3 2,3 1,1</div>
+            <div>this has no type</div>
+            </div>
+                
+        '''
+        div,div_end = makeHTMLTags("div")
+
+        # only match div tag having a type attribute with value "grid"
+        div_grid = div().setParseAction(withAttribute(type="grid"))
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+        
+        # construct a match with any div tag having a type attribute, regardless of the value
+        div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+    prints::
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    if args:
+        attrs = args[:]
+    else:
+        attrs = attrDict.items()
+    attrs = [(k,v) for k,v in attrs]
+    def pa(s,l,tokens):
+        for attrName,attrValue in attrs:
+            if attrName not in tokens:
+                raise ParseException(s,l,"no matching attribute " + attrName)
+            if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue:
+                raise ParseException(s,l,"attribute '%s' has value '%s', must be '%s'" %
+                                            (attrName, tokens[attrName], attrValue))
+    return pa
+withAttribute.ANY_VALUE = object()
+
+def withClass(classname, namespace=''):
+    """
+    Simplified version of C{L{withAttribute}} when matching on a div class - made
+    difficult because C{class} is a reserved word in Python.
+
+    Example::
+        html = '''
+            <div>
+            Some text
+            <div class="grid">1 4 0 1 0</div>
+            <div class="graph">1,3 2,3 1,1</div>
+            <div>this &lt;div&gt; has no class</div>
+            </div>
+                
+        '''
+        div,div_end = makeHTMLTags("div")
+        div_grid = div().setParseAction(withClass("grid"))
+        
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+        
+        div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+    prints::
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    classattr = "%s:class" % namespace if namespace else "class"
+    return withAttribute(**{classattr : classname})        
+
+opAssoc = _Constants()
+opAssoc.LEFT = object()
+opAssoc.RIGHT = object()
+
+def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ):
+    """
+    Helper method for constructing grammars of expressions made up of
+    operators working in a precedence hierarchy.  Operators may be unary or
+    binary, left- or right-associative.  Parse actions can also be attached
+    to operator expressions. The generated parser will also recognize the use 
+    of parentheses to override operator precedences (see example below).
+    
+    Note: if you define a deep operator list, you may see performance issues
+    when using infixNotation. See L{ParserElement.enablePackrat} for a
+    mechanism to potentially improve your parser performance.
+
+    Parameters:
+     - baseExpr - expression representing the most basic element for the nested
+     - opList - list of tuples, one for each operator precedence level in the
+      expression grammar; each tuple is of the form
+      (opExpr, numTerms, rightLeftAssoc, parseAction), where:
+       - opExpr is the pyparsing expression for the operator;
+          may also be a string, which will be converted to a Literal;
+          if numTerms is 3, opExpr is a tuple of two expressions, for the
+          two operators separating the 3 terms
+       - numTerms is the number of terms for this operator (must
+          be 1, 2, or 3)
+       - rightLeftAssoc is the indicator whether the operator is
+          right or left associative, using the pyparsing-defined
+          constants C{opAssoc.RIGHT} and C{opAssoc.LEFT}.
+       - parseAction is the parse action to be associated with
+          expressions matching this operator expression (the
+          parse action tuple member may be omitted); if the parse action
+          is passed a tuple or list of functions, this is equivalent to
+          calling C{setParseAction(*fn)} (L{ParserElement.setParseAction})
+     - lpar - expression for matching left-parentheses (default=C{Suppress('(')})
+     - rpar - expression for matching right-parentheses (default=C{Suppress(')')})
+
+    Example::
+        # simple example of four-function arithmetic with ints and variable names
+        integer = pyparsing_common.signed_integer
+        varname = pyparsing_common.identifier 
+        
+        arith_expr = infixNotation(integer | varname,
+            [
+            ('-', 1, opAssoc.RIGHT),
+            (oneOf('* /'), 2, opAssoc.LEFT),
+            (oneOf('+ -'), 2, opAssoc.LEFT),
+            ])
+        
+        arith_expr.runTests('''
+            5+3*6
+            (5+3)*6
+            -2--11
+            ''', fullDump=False)
+    prints::
+        5+3*6
+        [[5, '+', [3, '*', 6]]]
+
+        (5+3)*6
+        [[[5, '+', 3], '*', 6]]
+
+        -2--11
+        [[['-', 2], '-', ['-', 11]]]
+    """
+    ret = Forward()
+    lastExpr = baseExpr | ( lpar + ret + rpar )
+    for i,operDef in enumerate(opList):
+        opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4]
+        termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr
+        if arity == 3:
+            if opExpr is None or len(opExpr) != 2:
+                raise ValueError("if numterms=3, opExpr must be a tuple or list of two expressions")
+            opExpr1, opExpr2 = opExpr
+        thisExpr = Forward().setName(termName)
+        if rightLeftAssoc == opAssoc.LEFT:
+            if arity == 1:
+                matchExpr = FollowedBy(lastExpr + opExpr) + Group( lastExpr + OneOrMore( opExpr ) )
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = FollowedBy(lastExpr + opExpr + lastExpr) + Group( lastExpr + OneOrMore( opExpr + lastExpr ) )
+                else:
+                    matchExpr = FollowedBy(lastExpr+lastExpr) + Group( lastExpr + OneOrMore(lastExpr) )
+            elif arity == 3:
+                matchExpr = FollowedBy(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr) + \
+                            Group( lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr )
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        elif rightLeftAssoc == opAssoc.RIGHT:
+            if arity == 1:
+                # try to avoid LR with this extra test
+                if not isinstance(opExpr, Optional):
+                    opExpr = Optional(opExpr)
+                matchExpr = FollowedBy(opExpr.expr + thisExpr) + Group( opExpr + thisExpr )
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = FollowedBy(lastExpr + opExpr + thisExpr) + Group( lastExpr + OneOrMore( opExpr + thisExpr ) )
+                else:
+                    matchExpr = FollowedBy(lastExpr + thisExpr) + Group( lastExpr + OneOrMore( thisExpr ) )
+            elif arity == 3:
+                matchExpr = FollowedBy(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + \
+                            Group( lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr )
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        else:
+            raise ValueError("operator must indicate right or left associativity")
+        if pa:
+            if isinstance(pa, (tuple, list)):
+                matchExpr.setParseAction(*pa)
+            else:
+                matchExpr.setParseAction(pa)
+        thisExpr <<= ( matchExpr.setName(termName) | lastExpr )
+        lastExpr = thisExpr
+    ret <<= lastExpr
+    return ret
+
+operatorPrecedence = infixNotation
+"""(Deprecated) Former name of C{L{infixNotation}}, will be dropped in a future release."""
+
+dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"').setName("string enclosed in double quotes")
+sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("string enclosed in single quotes")
+quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"'|
+                       Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("quotedString using single or double quotes")
+unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal")
+
+def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()):
+    """
+    Helper method for defining nested lists enclosed in opening and closing
+    delimiters ("(" and ")" are the default).
+
+    Parameters:
+     - opener - opening character for a nested list (default=C{"("}); can also be a pyparsing expression
+     - closer - closing character for a nested list (default=C{")"}); can also be a pyparsing expression
+     - content - expression for items within the nested lists (default=C{None})
+     - ignoreExpr - expression for ignoring opening and closing delimiters (default=C{quotedString})
+
+    If an expression is not provided for the content argument, the nested
+    expression will capture all whitespace-delimited content between delimiters
+    as a list of separate values.
+
+    Use the C{ignoreExpr} argument to define expressions that may contain
+    opening or closing characters that should not be treated as opening
+    or closing characters for nesting, such as quotedString or a comment
+    expression.  Specify multiple expressions using an C{L{Or}} or C{L{MatchFirst}}.
+    The default is L{quotedString}, but if no expressions are to be ignored,
+    then pass C{None} for this argument.
+
+    Example::
+        data_type = oneOf("void int short long char float double")
+        decl_data_type = Combine(data_type + Optional(Word('*')))
+        ident = Word(alphas+'_', alphanums+'_')
+        number = pyparsing_common.number
+        arg = Group(decl_data_type + ident)
+        LPAR,RPAR = map(Suppress, "()")
+
+        code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment))
+
+        c_function = (decl_data_type("type") 
+                      + ident("name")
+                      + LPAR + Optional(delimitedList(arg), [])("args") + RPAR 
+                      + code_body("body"))
+        c_function.ignore(cStyleComment)
+        
+        source_code = '''
+            int is_odd(int x) { 
+                return (x%2); 
+            }
+                
+            int dec_to_hex(char hchar) { 
+                if (hchar >= '0' && hchar <= '9') { 
+                    return (ord(hchar)-ord('0')); 
+                } else { 
+                    return (10+ord(hchar)-ord('A'));
+                } 
+            }
+        '''
+        for func in c_function.searchString(source_code):
+            print("%(name)s (%(type)s) args: %(args)s" % func)
+
+    prints::
+        is_odd (int) args: [['int', 'x']]
+        dec_to_hex (int) args: [['char', 'hchar']]
+    """
+    if opener == closer:
+        raise ValueError("opening and closing strings cannot be the same")
+    if content is None:
+        if isinstance(opener,basestring) and isinstance(closer,basestring):
+            if len(opener) == 1 and len(closer)==1:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr +
+                                    CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+                else:
+                    content = (empty.copy()+CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS
+                                ).setParseAction(lambda t:t[0].strip()))
+            else:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr + 
+                                    ~Literal(opener) + ~Literal(closer) +
+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+                else:
+                    content = (Combine(OneOrMore(~Literal(opener) + ~Literal(closer) +
+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+        else:
+            raise ValueError("opening and closing arguments must be strings if no content expression is given")
+    ret = Forward()
+    if ignoreExpr is not None:
+        ret <<= Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) )
+    else:
+        ret <<= Group( Suppress(opener) + ZeroOrMore( ret | content )  + Suppress(closer) )
+    ret.setName('nested %s%s expression' % (opener,closer))
+    return ret
+
+def indentedBlock(blockStatementExpr, indentStack, indent=True):
+    """
+    Helper method for defining space-delimited indentation blocks, such as
+    those used to define block statements in Python source code.
+
+    Parameters:
+     - blockStatementExpr - expression defining syntax of statement that
+            is repeated within the indented block
+     - indentStack - list created by caller to manage indentation stack
+            (multiple statementWithIndentedBlock expressions within a single grammar
+            should share a common indentStack)
+     - indent - boolean indicating whether block must be indented beyond the
+            the current level; set to False for block of left-most statements
+            (default=C{True})
+
+    A valid block must contain at least one C{blockStatement}.
+
+    Example::
+        data = '''
+        def A(z):
+          A1
+          B = 100
+          G = A2
+          A2
+          A3
+        B
+        def BB(a,b,c):
+          BB1
+          def BBA():
+            bba1
+            bba2
+            bba3
+        C
+        D
+        def spam(x,y):
+             def eggs(z):
+                 pass
+        '''
+
+
+        indentStack = [1]
+        stmt = Forward()
+
+        identifier = Word(alphas, alphanums)
+        funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":")
+        func_body = indentedBlock(stmt, indentStack)
+        funcDef = Group( funcDecl + func_body )
+
+        rvalue = Forward()
+        funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")")
+        rvalue << (funcCall | identifier | Word(nums))
+        assignment = Group(identifier + "=" + rvalue)
+        stmt << ( funcDef | assignment | identifier )
+
+        module_body = OneOrMore(stmt)
+
+        parseTree = module_body.parseString(data)
+        parseTree.pprint()
+    prints::
+        [['def',
+          'A',
+          ['(', 'z', ')'],
+          ':',
+          [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],
+         'B',
+         ['def',
+          'BB',
+          ['(', 'a', 'b', 'c', ')'],
+          ':',
+          [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],
+         'C',
+         'D',
+         ['def',
+          'spam',
+          ['(', 'x', 'y', ')'],
+          ':',
+          [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] 
+    """
+    def checkPeerIndent(s,l,t):
+        if l >= len(s): return
+        curCol = col(l,s)
+        if curCol != indentStack[-1]:
+            if curCol > indentStack[-1]:
+                raise ParseFatalException(s,l,"illegal nesting")
+            raise ParseException(s,l,"not a peer entry")
+
+    def checkSubIndent(s,l,t):
+        curCol = col(l,s)
+        if curCol > indentStack[-1]:
+            indentStack.append( curCol )
+        else:
+            raise ParseException(s,l,"not a subentry")
+
+    def checkUnindent(s,l,t):
+        if l >= len(s): return
+        curCol = col(l,s)
+        if not(indentStack and curCol < indentStack[-1] and curCol <= indentStack[-2]):
+            raise ParseException(s,l,"not an unindent")
+        indentStack.pop()
+
+    NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress())
+    INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT')
+    PEER   = Empty().setParseAction(checkPeerIndent).setName('')
+    UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT')
+    if indent:
+        smExpr = Group( Optional(NL) +
+            #~ FollowedBy(blockStatementExpr) +
+            INDENT + (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) + UNDENT)
+    else:
+        smExpr = Group( Optional(NL) +
+            (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) )
+    blockStatementExpr.ignore(_bslash + LineEnd())
+    return smExpr.setName('indented block')
+
+alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]")
+punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]")
+
+anyOpenTag,anyCloseTag = makeHTMLTags(Word(alphas,alphanums+"_:").setName('any tag'))
+_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(),'><& "\''))
+commonHTMLEntity = Regex('&(?P<entity>' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity")
+def replaceHTMLEntity(t):
+    """Helper parser action to replace common HTML entities with their special characters"""
+    return _htmlEntityMap.get(t.entity)
+
+# it's easy to get these comment structures wrong - they're very common, so may as well make them available
+cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment")
+"Comment of the form C{/* ... */}"
+
+htmlComment = Regex(r"<!--[\s\S]*?-->").setName("HTML comment")
+"Comment of the form C{<!-- ... -->}"
+
+restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line")
+dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment")
+"Comment of the form C{// ... (to end of line)}"
+
+cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/'| dblSlashComment).setName("C++ style comment")
+"Comment of either form C{L{cStyleComment}} or C{L{dblSlashComment}}"
+
+javaStyleComment = cppStyleComment
+"Same as C{L{cppStyleComment}}"
+
+pythonStyleComment = Regex(r"#.*").setName("Python style comment")
+"Comment of the form C{# ... (to end of line)}"
+
+_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',') +
+                                  Optional( Word(" \t") +
+                                            ~Literal(",") + ~LineEnd() ) ) ).streamline().setName("commaItem")
+commaSeparatedList = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("commaSeparatedList")
+"""(Deprecated) Predefined expression of 1 or more printable words or quoted strings, separated by commas.
+   This expression is deprecated in favor of L{pyparsing_common.comma_separated_list}."""
+
+# some other useful expressions - using lower-case class name since we are really using this as a namespace
+class pyparsing_common:
+    """
+    Here are some common low-level expressions that may be useful in jump-starting parser development:
+     - numeric forms (L{integers<integer>}, L{reals<real>}, L{scientific notation<sci_real>})
+     - common L{programming identifiers<identifier>}
+     - network addresses (L{MAC<mac_address>}, L{IPv4<ipv4_address>}, L{IPv6<ipv6_address>})
+     - ISO8601 L{dates<iso8601_date>} and L{datetime<iso8601_datetime>}
+     - L{UUID<uuid>}
+     - L{comma-separated list<comma_separated_list>}
+    Parse actions:
+     - C{L{convertToInteger}}
+     - C{L{convertToFloat}}
+     - C{L{convertToDate}}
+     - C{L{convertToDatetime}}
+     - C{L{stripHTMLTags}}
+     - C{L{upcaseTokens}}
+     - C{L{downcaseTokens}}
+
+    Example::
+        pyparsing_common.number.runTests('''
+            # any int or real number, returned as the appropriate type
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.fnumber.runTests('''
+            # any int or real number, returned as float
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.hex_integer.runTests('''
+            # hex numbers
+            100
+            FF
+            ''')
+
+        pyparsing_common.fraction.runTests('''
+            # fractions
+            1/2
+            -3/4
+            ''')
+
+        pyparsing_common.mixed_integer.runTests('''
+            # mixed fractions
+            1
+            1/2
+            -3/4
+            1-3/4
+            ''')
+
+        import uuid
+        pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+        pyparsing_common.uuid.runTests('''
+            # uuid
+            12345678-1234-5678-1234-567812345678
+            ''')
+    prints::
+        # any int or real number, returned as the appropriate type
+        100
+        [100]
+
+        -100
+        [-100]
+
+        +100
+        [100]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # any int or real number, returned as float
+        100
+        [100.0]
+
+        -100
+        [-100.0]
+
+        +100
+        [100.0]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # hex numbers
+        100
+        [256]
+
+        FF
+        [255]
+
+        # fractions
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        # mixed fractions
+        1
+        [1]
+
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        1-3/4
+        [1.75]
+
+        # uuid
+        12345678-1234-5678-1234-567812345678
+        [UUID('12345678-1234-5678-1234-567812345678')]
+    """
+
+    convertToInteger = tokenMap(int)
+    """
+    Parse action for converting parsed integers to Python int
+    """
+
+    convertToFloat = tokenMap(float)
+    """
+    Parse action for converting parsed numbers to Python float
+    """
+
+    integer = Word(nums).setName("integer").setParseAction(convertToInteger)
+    """expression that parses an unsigned integer, returns an int"""
+
+    hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int,16))
+    """expression that parses a hexadecimal integer, returns an int"""
+
+    signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger)
+    """expression that parses an integer with optional leading sign, returns an int"""
+
+    fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction")
+    """fractional expression of an integer divided by an integer, returns a float"""
+    fraction.addParseAction(lambda t: t[0]/t[-1])
+
+    mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction")
+    """mixed integer of the form 'integer - fraction', with optional leading integer, returns float"""
+    mixed_integer.addParseAction(sum)
+
+    real = Regex(r'[+-]?\d+\.\d*').setName("real number").setParseAction(convertToFloat)
+    """expression that parses a floating point number and returns a float"""
+
+    sci_real = Regex(r'[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat)
+    """expression that parses a floating point number with optional scientific notation and returns a float"""
+
+    # streamlining this expression makes the docs nicer-looking
+    number = (sci_real | real | signed_integer).streamline()
+    """any numeric expression, returns the corresponding Python type"""
+
+    fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat)
+    """any int or real number, returned as float"""
+    
+    identifier = Word(alphas+'_', alphanums+'_').setName("identifier")
+    """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')"""
+    
+    ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address")
+    "IPv4 address (C{0.0.0.0 - 255.255.255.255})"
+
+    _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer")
+    _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part)*7).setName("full IPv6 address")
+    _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part)*(0,6)) + "::" + Optional(_ipv6_part + (':' + _ipv6_part)*(0,6))).setName("short IPv6 address")
+    _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8)
+    _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address")
+    ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address")
+    "IPv6 address (long, short, or mixed form)"
+    
+    mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address")
+    "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)"
+
+    @staticmethod
+    def convertToDate(fmt="%Y-%m-%d"):
+        """
+        Helper to create a parse action for converting parsed date string to Python datetime.date
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%d"})
+
+        Example::
+            date_expr = pyparsing_common.iso8601_date.copy()
+            date_expr.setParseAction(pyparsing_common.convertToDate())
+            print(date_expr.parseString("1999-12-31"))
+        prints::
+            [datetime.date(1999, 12, 31)]
+        """
+        def cvt_fn(s,l,t):
+            try:
+                return datetime.strptime(t[0], fmt).date()
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    @staticmethod
+    def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"):
+        """
+        Helper to create a parse action for converting parsed datetime string to Python datetime.datetime
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%dT%H:%M:%S.%f"})
+
+        Example::
+            dt_expr = pyparsing_common.iso8601_datetime.copy()
+            dt_expr.setParseAction(pyparsing_common.convertToDatetime())
+            print(dt_expr.parseString("1999-12-31T23:59:59.999"))
+        prints::
+            [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]
+        """
+        def cvt_fn(s,l,t):
+            try:
+                return datetime.strptime(t[0], fmt)
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    iso8601_date = Regex(r'(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?').setName("ISO8601 date")
+    "ISO8601 date (C{yyyy-mm-dd})"
+
+    iso8601_datetime = Regex(r'(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime")
+    "ISO8601 datetime (C{yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)}) - trailing seconds, milliseconds, and timezone optional; accepts separating C{'T'} or C{' '}"
+
+    uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID")
+    "UUID (C{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx})"
+
+    _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress()
+    @staticmethod
+    def stripHTMLTags(s, l, tokens):
+        """
+        Parse action to remove HTML tags from web page HTML source
+
+        Example::
+            # strip HTML links from normal text 
+            text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'
+            td,td_end = makeHTMLTags("TD")
+            table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end
+            
+            print(table_text.parseString(text).body) # -> 'More info at the pyparsing wiki page'
+        """
+        return pyparsing_common._html_stripper.transformString(tokens[0])
+
+    _commasepitem = Combine(OneOrMore(~Literal(",") + ~LineEnd() + Word(printables, excludeChars=',') 
+                                        + Optional( White(" \t") ) ) ).streamline().setName("commaItem")
+    comma_separated_list = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("comma separated list")
+    """Predefined expression of 1 or more printable words or quoted strings, separated by commas."""
+
+    upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper()))
+    """Parse action to convert tokens to upper case."""
+
+    downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower()))
+    """Parse action to convert tokens to lower case."""
+
+
+if __name__ == "__main__":
+
+    selectToken    = CaselessLiteral("select")
+    fromToken      = CaselessLiteral("from")
+
+    ident          = Word(alphas, alphanums + "_$")
+
+    columnName     = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    columnNameList = Group(delimitedList(columnName)).setName("columns")
+    columnSpec     = ('*' | columnNameList)
+
+    tableName      = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    tableNameList  = Group(delimitedList(tableName)).setName("tables")
+    
+    simpleSQL      = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables")
+
+    # demo runTests method, including embedded comments in test string
+    simpleSQL.runTests("""
+        # '*' as column list and dotted table name
+        select * from SYS.XYZZY
+
+        # caseless match on "SELECT", and casts back to "select"
+        SELECT * from XYZZY, ABC
+
+        # list of column names, and mixed case SELECT keyword
+        Select AA,BB,CC from Sys.dual
+
+        # multiple tables
+        Select A, B, C from Sys.dual, Table2
+
+        # invalid SELECT keyword - should fail
+        Xelect A, B, C from Sys.dual
+
+        # incomplete command - should fail
+        Select
+
+        # invalid column name - should fail
+        Select ^^^ frox Sys.dual
+
+        """)
+
+    pyparsing_common.number.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    # any int or real number, returned as float
+    pyparsing_common.fnumber.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    pyparsing_common.hex_integer.runTests("""
+        100
+        FF
+        """)
+
+    import uuid
+    pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+    pyparsing_common.uuid.runTests("""
+        12345678-1234-5678-1234-567812345678
+        """)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/six.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/six.py
new file mode 100644
index 0000000..190c023
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/_vendor/six.py
@@ -0,0 +1,868 @@
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+# Copyright (c) 2010-2015 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.10.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        if value is None:
+            value = tp()
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    raise tp, value, tb
+""")
+
+
+if sys.version_info[:2] == (3, 2):
+    exec_("""def raise_from(value, from_value):
+    if from_value is None:
+        raise value
+    raise value from from_value
+""")
+elif sys.version_info[:2] > (3, 2):
+    exec_("""def raise_from(value, from_value):
+    raise value from from_value
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        def wrapper(f):
+            f = functools.wraps(wrapped, assigned, updated)(f)
+            f.__wrapped__ = wrapped
+            return f
+        return wrapper
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/archive_util.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/archive_util.py
new file mode 100644
index 0000000..8143604
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/archive_util.py
@@ -0,0 +1,173 @@
+"""Utilities for extracting common archive formats"""
+
+import zipfile
+import tarfile
+import os
+import shutil
+import posixpath
+import contextlib
+from distutils.errors import DistutilsError
+
+from pkg_resources import ensure_directory
+
+__all__ = [
+    "unpack_archive", "unpack_zipfile", "unpack_tarfile", "default_filter",
+    "UnrecognizedFormat", "extraction_drivers", "unpack_directory",
+]
+
+
+class UnrecognizedFormat(DistutilsError):
+    """Couldn't recognize the archive type"""
+
+
+def default_filter(src, dst):
+    """The default progress/filter callback; returns True for all files"""
+    return dst
+
+
+def unpack_archive(filename, extract_dir, progress_filter=default_filter,
+        drivers=None):
+    """Unpack `filename` to `extract_dir`, or raise ``UnrecognizedFormat``
+
+    `progress_filter` is a function taking two arguments: a source path
+    internal to the archive ('/'-separated), and a filesystem path where it
+    will be extracted.  The callback must return the desired extract path
+    (which may be the same as the one passed in), or else ``None`` to skip
+    that file or directory.  The callback can thus be used to report on the
+    progress of the extraction, as well as to filter the items extracted or
+    alter their extraction paths.
+
+    `drivers`, if supplied, must be a non-empty sequence of functions with the
+    same signature as this function (minus the `drivers` argument), that raise
+    ``UnrecognizedFormat`` if they do not support extracting the designated
+    archive type.  The `drivers` are tried in sequence until one is found that
+    does not raise an error, or until all are exhausted (in which case
+    ``UnrecognizedFormat`` is raised).  If you do not supply a sequence of
+    drivers, the module's ``extraction_drivers`` constant will be used, which
+    means that ``unpack_zipfile`` and ``unpack_tarfile`` will be tried, in that
+    order.
+    """
+    for driver in drivers or extraction_drivers:
+        try:
+            driver(filename, extract_dir, progress_filter)
+        except UnrecognizedFormat:
+            continue
+        else:
+            return
+    else:
+        raise UnrecognizedFormat(
+            "Not a recognized archive type: %s" % filename
+        )
+
+
+def unpack_directory(filename, extract_dir, progress_filter=default_filter):
+    """"Unpack" a directory, using the same interface as for archives
+
+    Raises ``UnrecognizedFormat`` if `filename` is not a directory
+    """
+    if not os.path.isdir(filename):
+        raise UnrecognizedFormat("%s is not a directory" % filename)
+
+    paths = {
+        filename: ('', extract_dir),
+    }
+    for base, dirs, files in os.walk(filename):
+        src, dst = paths[base]
+        for d in dirs:
+            paths[os.path.join(base, d)] = src + d + '/', os.path.join(dst, d)
+        for f in files:
+            target = os.path.join(dst, f)
+            target = progress_filter(src + f, target)
+            if not target:
+                # skip non-files
+                continue
+            ensure_directory(target)
+            f = os.path.join(base, f)
+            shutil.copyfile(f, target)
+            shutil.copystat(f, target)
+
+
+def unpack_zipfile(filename, extract_dir, progress_filter=default_filter):
+    """Unpack zip `filename` to `extract_dir`
+
+    Raises ``UnrecognizedFormat`` if `filename` is not a zipfile (as determined
+    by ``zipfile.is_zipfile()``).  See ``unpack_archive()`` for an explanation
+    of the `progress_filter` argument.
+    """
+
+    if not zipfile.is_zipfile(filename):
+        raise UnrecognizedFormat("%s is not a zip file" % (filename,))
+
+    with zipfile.ZipFile(filename) as z:
+        for info in z.infolist():
+            name = info.filename
+
+            # don't extract absolute paths or ones with .. in them
+            if name.startswith('/') or '..' in name.split('/'):
+                continue
+
+            target = os.path.join(extract_dir, *name.split('/'))
+            target = progress_filter(name, target)
+            if not target:
+                continue
+            if name.endswith('/'):
+                # directory
+                ensure_directory(target)
+            else:
+                # file
+                ensure_directory(target)
+                data = z.read(info.filename)
+                with open(target, 'wb') as f:
+                    f.write(data)
+            unix_attributes = info.external_attr >> 16
+            if unix_attributes:
+                os.chmod(target, unix_attributes)
+
+
+def unpack_tarfile(filename, extract_dir, progress_filter=default_filter):
+    """Unpack tar/tar.gz/tar.bz2 `filename` to `extract_dir`
+
+    Raises ``UnrecognizedFormat`` if `filename` is not a tarfile (as determined
+    by ``tarfile.open()``).  See ``unpack_archive()`` for an explanation
+    of the `progress_filter` argument.
+    """
+    try:
+        tarobj = tarfile.open(filename)
+    except tarfile.TarError:
+        raise UnrecognizedFormat(
+            "%s is not a compressed or uncompressed tar file" % (filename,)
+        )
+    with contextlib.closing(tarobj):
+        # don't do any chowning!
+        tarobj.chown = lambda *args: None
+        for member in tarobj:
+            name = member.name
+            # don't extract absolute paths or ones with .. in them
+            if not name.startswith('/') and '..' not in name.split('/'):
+                prelim_dst = os.path.join(extract_dir, *name.split('/'))
+
+                # resolve any links and to extract the link targets as normal
+                # files
+                while member is not None and (member.islnk() or member.issym()):
+                    linkpath = member.linkname
+                    if member.issym():
+                        base = posixpath.dirname(member.name)
+                        linkpath = posixpath.join(base, linkpath)
+                        linkpath = posixpath.normpath(linkpath)
+                    member = tarobj._getmember(linkpath)
+
+                if member is not None and (member.isfile() or member.isdir()):
+                    final_dst = progress_filter(name, prelim_dst)
+                    if final_dst:
+                        if final_dst.endswith(os.sep):
+                            final_dst = final_dst[:-1]
+                        try:
+                            # XXX Ugh
+                            tarobj._extract_member(member, final_dst)
+                        except tarfile.ExtractError:
+                            # chown/chmod/mkfifo/mknode/makedev failed
+                            pass
+        return True
+
+
+extraction_drivers = unpack_directory, unpack_zipfile, unpack_tarfile
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/build_meta.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/build_meta.py
new file mode 100644
index 0000000..10c4b52
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/build_meta.py
@@ -0,0 +1,257 @@
+"""A PEP 517 interface to setuptools
+
+Previously, when a user or a command line tool (let's call it a "frontend")
+needed to make a request of setuptools to take a certain action, for
+example, generating a list of installation requirements, the frontend would
+would call "setup.py egg_info" or "setup.py bdist_wheel" on the command line.
+
+PEP 517 defines a different method of interfacing with setuptools. Rather
+than calling "setup.py" directly, the frontend should:
+
+  1. Set the current directory to the directory with a setup.py file
+  2. Import this module into a safe python interpreter (one in which
+     setuptools can potentially set global variables or crash hard).
+  3. Call one of the functions defined in PEP 517.
+
+What each function does is defined in PEP 517. However, here is a "casual"
+definition of the functions (this definition should not be relied on for
+bug reports or API stability):
+
+  - `build_wheel`: build a wheel in the folder and return the basename
+  - `get_requires_for_build_wheel`: get the `setup_requires` to build
+  - `prepare_metadata_for_build_wheel`: get the `install_requires`
+  - `build_sdist`: build an sdist in the folder and return the basename
+  - `get_requires_for_build_sdist`: get the `setup_requires` to build
+
+Again, this is not a formal definition! Just a "taste" of the module.
+"""
+
+import io
+import os
+import sys
+import tokenize
+import shutil
+import contextlib
+
+import setuptools
+import distutils
+from setuptools.py31compat import TemporaryDirectory
+
+from pkg_resources import parse_requirements
+from pkg_resources.py31compat import makedirs
+
+__all__ = ['get_requires_for_build_sdist',
+           'get_requires_for_build_wheel',
+           'prepare_metadata_for_build_wheel',
+           'build_wheel',
+           'build_sdist',
+           '__legacy__',
+           'SetupRequirementsError']
+
+class SetupRequirementsError(BaseException):
+    def __init__(self, specifiers):
+        self.specifiers = specifiers
+
+
+class Distribution(setuptools.dist.Distribution):
+    def fetch_build_eggs(self, specifiers):
+        specifier_list = list(map(str, parse_requirements(specifiers)))
+
+        raise SetupRequirementsError(specifier_list)
+
+    @classmethod
+    @contextlib.contextmanager
+    def patch(cls):
+        """
+        Replace
+        distutils.dist.Distribution with this class
+        for the duration of this context.
+        """
+        orig = distutils.core.Distribution
+        distutils.core.Distribution = cls
+        try:
+            yield
+        finally:
+            distutils.core.Distribution = orig
+
+
+def _to_str(s):
+    """
+    Convert a filename to a string (on Python 2, explicitly
+    a byte string, not Unicode) as distutils checks for the
+    exact type str.
+    """
+    if sys.version_info[0] == 2 and not isinstance(s, str):
+        # Assume it's Unicode, as that's what the PEP says
+        # should be provided.
+        return s.encode(sys.getfilesystemencoding())
+    return s
+
+
+def _get_immediate_subdirectories(a_dir):
+    return [name for name in os.listdir(a_dir)
+            if os.path.isdir(os.path.join(a_dir, name))]
+
+
+def _file_with_extension(directory, extension):
+    matching = (
+        f for f in os.listdir(directory)
+        if f.endswith(extension)
+    )
+    file, = matching
+    return file
+
+
+def _open_setup_script(setup_script):
+    if not os.path.exists(setup_script):
+        # Supply a default setup.py
+        return io.StringIO(u"from setuptools import setup; setup()")
+
+    return getattr(tokenize, 'open', open)(setup_script)
+
+
+class _BuildMetaBackend(object):
+
+    def _fix_config(self, config_settings):
+        config_settings = config_settings or {}
+        config_settings.setdefault('--global-option', [])
+        return config_settings
+
+    def _get_build_requires(self, config_settings, requirements):
+        config_settings = self._fix_config(config_settings)
+
+        sys.argv = sys.argv[:1] + ['egg_info'] + \
+            config_settings["--global-option"]
+        try:
+            with Distribution.patch():
+                self.run_setup()
+        except SetupRequirementsError as e:
+            requirements += e.specifiers
+
+        return requirements
+
+    def run_setup(self, setup_script='setup.py'):
+        # Note that we can reuse our build directory between calls
+        # Correctness comes first, then optimization later
+        __file__ = setup_script
+        __name__ = '__main__'
+
+        with _open_setup_script(__file__) as f:
+            code = f.read().replace(r'\r\n', r'\n')
+
+        exec(compile(code, __file__, 'exec'), locals())
+
+    def get_requires_for_build_wheel(self, config_settings=None):
+        config_settings = self._fix_config(config_settings)
+        return self._get_build_requires(config_settings, requirements=['wheel'])
+
+    def get_requires_for_build_sdist(self, config_settings=None):
+        config_settings = self._fix_config(config_settings)
+        return self._get_build_requires(config_settings, requirements=[])
+
+    def prepare_metadata_for_build_wheel(self, metadata_directory,
+                                         config_settings=None):
+        sys.argv = sys.argv[:1] + ['dist_info', '--egg-base',
+                                   _to_str(metadata_directory)]
+        self.run_setup()
+
+        dist_info_directory = metadata_directory
+        while True:
+            dist_infos = [f for f in os.listdir(dist_info_directory)
+                          if f.endswith('.dist-info')]
+
+            if (len(dist_infos) == 0 and
+                len(_get_immediate_subdirectories(dist_info_directory)) == 1):
+
+                dist_info_directory = os.path.join(
+                    dist_info_directory, os.listdir(dist_info_directory)[0])
+                continue
+
+            assert len(dist_infos) == 1
+            break
+
+        # PEP 517 requires that the .dist-info directory be placed in the
+        # metadata_directory. To comply, we MUST copy the directory to the root
+        if dist_info_directory != metadata_directory:
+            shutil.move(
+                os.path.join(dist_info_directory, dist_infos[0]),
+                metadata_directory)
+            shutil.rmtree(dist_info_directory, ignore_errors=True)
+
+        return dist_infos[0]
+
+    def _build_with_temp_dir(self, setup_command, result_extension,
+                             result_directory, config_settings):
+        config_settings = self._fix_config(config_settings)
+        result_directory = os.path.abspath(result_directory)
+
+        # Build in a temporary directory, then copy to the target.
+        makedirs(result_directory, exist_ok=True)
+        with TemporaryDirectory(dir=result_directory) as tmp_dist_dir:
+            sys.argv = (sys.argv[:1] + setup_command +
+                        ['--dist-dir', tmp_dist_dir] +
+                        config_settings["--global-option"])
+            self.run_setup()
+
+            result_basename = _file_with_extension(tmp_dist_dir, result_extension)
+            result_path = os.path.join(result_directory, result_basename)
+            if os.path.exists(result_path):
+                # os.rename will fail overwriting on non-Unix.
+                os.remove(result_path)
+            os.rename(os.path.join(tmp_dist_dir, result_basename), result_path)
+
+        return result_basename
+
+
+    def build_wheel(self, wheel_directory, config_settings=None,
+                    metadata_directory=None):
+        return self._build_with_temp_dir(['bdist_wheel'], '.whl',
+                                         wheel_directory, config_settings)
+
+    def build_sdist(self, sdist_directory, config_settings=None):
+        return self._build_with_temp_dir(['sdist', '--formats', 'gztar'],
+                                         '.tar.gz', sdist_directory,
+                                         config_settings)
+
+
+class _BuildMetaLegacyBackend(_BuildMetaBackend):
+    """Compatibility backend for setuptools
+
+    This is a version of setuptools.build_meta that endeavors to maintain backwards
+    compatibility with pre-PEP 517 modes of invocation. It exists as a temporary
+    bridge between the old packaging mechanism and the new packaging mechanism,
+    and will eventually be removed.
+    """
+    def run_setup(self, setup_script='setup.py'):
+        # In order to maintain compatibility with scripts assuming that
+        # the setup.py script is in a directory on the PYTHONPATH, inject
+        # '' into sys.path. (pypa/setuptools#1642)
+        sys_path = list(sys.path)           # Save the original path
+
+        script_dir = os.path.dirname(os.path.abspath(setup_script))
+        if script_dir not in sys.path:
+            sys.path.insert(0, script_dir)
+
+        try:
+            super(_BuildMetaLegacyBackend,
+                  self).run_setup(setup_script=setup_script)
+        finally:
+            # While PEP 517 frontends should be calling each hook in a fresh
+            # subprocess according to the standard (and thus it should not be
+            # strictly necessary to restore the old sys.path), we'll restore
+            # the original path so that the path manipulation does not persist
+            # within the hook after run_setup is called.
+            sys.path[:] = sys_path
+
+# The primary backend
+_BACKEND = _BuildMetaBackend()
+
+get_requires_for_build_wheel = _BACKEND.get_requires_for_build_wheel
+get_requires_for_build_sdist = _BACKEND.get_requires_for_build_sdist
+prepare_metadata_for_build_wheel = _BACKEND.prepare_metadata_for_build_wheel
+build_wheel = _BACKEND.build_wheel
+build_sdist = _BACKEND.build_sdist
+
+
+# The legacy backend
+__legacy__ = _BuildMetaLegacyBackend()
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/__init__.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/__init__.py
new file mode 100644
index 0000000..fe619e2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/__init__.py
@@ -0,0 +1,18 @@
+__all__ = [
+    'alias', 'bdist_egg', 'bdist_rpm', 'build_ext', 'build_py', 'develop',
+    'easy_install', 'egg_info', 'install', 'install_lib', 'rotate', 'saveopts',
+    'sdist', 'setopt', 'test', 'install_egg_info', 'install_scripts',
+    'register', 'bdist_wininst', 'upload_docs', 'upload', 'build_clib',
+    'dist_info',
+]
+
+from distutils.command.bdist import bdist
+import sys
+
+from setuptools.command import install_scripts
+
+if 'egg' not in bdist.format_commands:
+    bdist.format_command['egg'] = ('bdist_egg', "Python .egg file")
+    bdist.format_commands.append('egg')
+
+del bdist, sys
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diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/alias.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/alias.py
new file mode 100644
index 0000000..4532b1c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/alias.py
@@ -0,0 +1,80 @@
+from distutils.errors import DistutilsOptionError
+
+from setuptools.extern.six.moves import map
+
+from setuptools.command.setopt import edit_config, option_base, config_file
+
+
+def shquote(arg):
+    """Quote an argument for later parsing by shlex.split()"""
+    for c in '"', "'", "\\", "#":
+        if c in arg:
+            return repr(arg)
+    if arg.split() != [arg]:
+        return repr(arg)
+    return arg
+
+
+class alias(option_base):
+    """Define a shortcut that invokes one or more commands"""
+
+    description = "define a shortcut to invoke one or more commands"
+    command_consumes_arguments = True
+
+    user_options = [
+        ('remove', 'r', 'remove (unset) the alias'),
+    ] + option_base.user_options
+
+    boolean_options = option_base.boolean_options + ['remove']
+
+    def initialize_options(self):
+        option_base.initialize_options(self)
+        self.args = None
+        self.remove = None
+
+    def finalize_options(self):
+        option_base.finalize_options(self)
+        if self.remove and len(self.args) != 1:
+            raise DistutilsOptionError(
+                "Must specify exactly one argument (the alias name) when "
+                "using --remove"
+            )
+
+    def run(self):
+        aliases = self.distribution.get_option_dict('aliases')
+
+        if not self.args:
+            print("Command Aliases")
+            print("---------------")
+            for alias in aliases:
+                print("setup.py alias", format_alias(alias, aliases))
+            return
+
+        elif len(self.args) == 1:
+            alias, = self.args
+            if self.remove:
+                command = None
+            elif alias in aliases:
+                print("setup.py alias", format_alias(alias, aliases))
+                return
+            else:
+                print("No alias definition found for %r" % alias)
+                return
+        else:
+            alias = self.args[0]
+            command = ' '.join(map(shquote, self.args[1:]))
+
+        edit_config(self.filename, {'aliases': {alias: command}}, self.dry_run)
+
+
+def format_alias(name, aliases):
+    source, command = aliases[name]
+    if source == config_file('global'):
+        source = '--global-config '
+    elif source == config_file('user'):
+        source = '--user-config '
+    elif source == config_file('local'):
+        source = ''
+    else:
+        source = '--filename=%r' % source
+    return source + name + ' ' + command
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/bdist_egg.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/bdist_egg.py
new file mode 100644
index 0000000..98470f1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/bdist_egg.py
@@ -0,0 +1,502 @@
+"""setuptools.command.bdist_egg
+
+Build .egg distributions"""
+
+from distutils.errors import DistutilsSetupError
+from distutils.dir_util import remove_tree, mkpath
+from distutils import log
+from types import CodeType
+import sys
+import os
+import re
+import textwrap
+import marshal
+
+from setuptools.extern import six
+
+from pkg_resources import get_build_platform, Distribution, ensure_directory
+from pkg_resources import EntryPoint
+from setuptools.extension import Library
+from setuptools import Command
+
+try:
+    # Python 2.7 or >=3.2
+    from sysconfig import get_path, get_python_version
+
+    def _get_purelib():
+        return get_path("purelib")
+except ImportError:
+    from distutils.sysconfig import get_python_lib, get_python_version
+
+    def _get_purelib():
+        return get_python_lib(False)
+
+
+def strip_module(filename):
+    if '.' in filename:
+        filename = os.path.splitext(filename)[0]
+    if filename.endswith('module'):
+        filename = filename[:-6]
+    return filename
+
+
+def sorted_walk(dir):
+    """Do os.walk in a reproducible way,
+    independent of indeterministic filesystem readdir order
+    """
+    for base, dirs, files in os.walk(dir):
+        dirs.sort()
+        files.sort()
+        yield base, dirs, files
+
+
+def write_stub(resource, pyfile):
+    _stub_template = textwrap.dedent("""
+        def __bootstrap__():
+            global __bootstrap__, __loader__, __file__
+            import sys, pkg_resources, imp
+            __file__ = pkg_resources.resource_filename(__name__, %r)
+            __loader__ = None; del __bootstrap__, __loader__
+            imp.load_dynamic(__name__,__file__)
+        __bootstrap__()
+        """).lstrip()
+    with open(pyfile, 'w') as f:
+        f.write(_stub_template % resource)
+
+
+class bdist_egg(Command):
+    description = "create an \"egg\" distribution"
+
+    user_options = [
+        ('bdist-dir=', 'b',
+         "temporary directory for creating the distribution"),
+        ('plat-name=', 'p', "platform name to embed in generated filenames "
+                            "(default: %s)" % get_build_platform()),
+        ('exclude-source-files', None,
+         "remove all .py files from the generated egg"),
+        ('keep-temp', 'k',
+         "keep the pseudo-installation tree around after " +
+         "creating the distribution archive"),
+        ('dist-dir=', 'd',
+         "directory to put final built distributions in"),
+        ('skip-build', None,
+         "skip rebuilding everything (for testing/debugging)"),
+    ]
+
+    boolean_options = [
+        'keep-temp', 'skip-build', 'exclude-source-files'
+    ]
+
+    def initialize_options(self):
+        self.bdist_dir = None
+        self.plat_name = None
+        self.keep_temp = 0
+        self.dist_dir = None
+        self.skip_build = 0
+        self.egg_output = None
+        self.exclude_source_files = None
+
+    def finalize_options(self):
+        ei_cmd = self.ei_cmd = self.get_finalized_command("egg_info")
+        self.egg_info = ei_cmd.egg_info
+
+        if self.bdist_dir is None:
+            bdist_base = self.get_finalized_command('bdist').bdist_base
+            self.bdist_dir = os.path.join(bdist_base, 'egg')
+
+        if self.plat_name is None:
+            self.plat_name = get_build_platform()
+
+        self.set_undefined_options('bdist', ('dist_dir', 'dist_dir'))
+
+        if self.egg_output is None:
+
+            # Compute filename of the output egg
+            basename = Distribution(
+                None, None, ei_cmd.egg_name, ei_cmd.egg_version,
+                get_python_version(),
+                self.distribution.has_ext_modules() and self.plat_name
+            ).egg_name()
+
+            self.egg_output = os.path.join(self.dist_dir, basename + '.egg')
+
+    def do_install_data(self):
+        # Hack for packages that install data to install's --install-lib
+        self.get_finalized_command('install').install_lib = self.bdist_dir
+
+        site_packages = os.path.normcase(os.path.realpath(_get_purelib()))
+        old, self.distribution.data_files = self.distribution.data_files, []
+
+        for item in old:
+            if isinstance(item, tuple) and len(item) == 2:
+                if os.path.isabs(item[0]):
+                    realpath = os.path.realpath(item[0])
+                    normalized = os.path.normcase(realpath)
+                    if normalized == site_packages or normalized.startswith(
+                        site_packages + os.sep
+                    ):
+                        item = realpath[len(site_packages) + 1:], item[1]
+                        # XXX else: raise ???
+            self.distribution.data_files.append(item)
+
+        try:
+            log.info("installing package data to %s", self.bdist_dir)
+            self.call_command('install_data', force=0, root=None)
+        finally:
+            self.distribution.data_files = old
+
+    def get_outputs(self):
+        return [self.egg_output]
+
+    def call_command(self, cmdname, **kw):
+        """Invoke reinitialized command `cmdname` with keyword args"""
+        for dirname in INSTALL_DIRECTORY_ATTRS:
+            kw.setdefault(dirname, self.bdist_dir)
+        kw.setdefault('skip_build', self.skip_build)
+        kw.setdefault('dry_run', self.dry_run)
+        cmd = self.reinitialize_command(cmdname, **kw)
+        self.run_command(cmdname)
+        return cmd
+
+    def run(self):
+        # Generate metadata first
+        self.run_command("egg_info")
+        # We run install_lib before install_data, because some data hacks
+        # pull their data path from the install_lib command.
+        log.info("installing library code to %s", self.bdist_dir)
+        instcmd = self.get_finalized_command('install')
+        old_root = instcmd.root
+        instcmd.root = None
+        if self.distribution.has_c_libraries() and not self.skip_build:
+            self.run_command('build_clib')
+        cmd = self.call_command('install_lib', warn_dir=0)
+        instcmd.root = old_root
+
+        all_outputs, ext_outputs = self.get_ext_outputs()
+        self.stubs = []
+        to_compile = []
+        for (p, ext_name) in enumerate(ext_outputs):
+            filename, ext = os.path.splitext(ext_name)
+            pyfile = os.path.join(self.bdist_dir, strip_module(filename) +
+                                  '.py')
+            self.stubs.append(pyfile)
+            log.info("creating stub loader for %s", ext_name)
+            if not self.dry_run:
+                write_stub(os.path.basename(ext_name), pyfile)
+            to_compile.append(pyfile)
+            ext_outputs[p] = ext_name.replace(os.sep, '/')
+
+        if to_compile:
+            cmd.byte_compile(to_compile)
+        if self.distribution.data_files:
+            self.do_install_data()
+
+        # Make the EGG-INFO directory
+        archive_root = self.bdist_dir
+        egg_info = os.path.join(archive_root, 'EGG-INFO')
+        self.mkpath(egg_info)
+        if self.distribution.scripts:
+            script_dir = os.path.join(egg_info, 'scripts')
+            log.info("installing scripts to %s", script_dir)
+            self.call_command('install_scripts', install_dir=script_dir,
+                              no_ep=1)
+
+        self.copy_metadata_to(egg_info)
+        native_libs = os.path.join(egg_info, "native_libs.txt")
+        if all_outputs:
+            log.info("writing %s", native_libs)
+            if not self.dry_run:
+                ensure_directory(native_libs)
+                libs_file = open(native_libs, 'wt')
+                libs_file.write('\n'.join(all_outputs))
+                libs_file.write('\n')
+                libs_file.close()
+        elif os.path.isfile(native_libs):
+            log.info("removing %s", native_libs)
+            if not self.dry_run:
+                os.unlink(native_libs)
+
+        write_safety_flag(
+            os.path.join(archive_root, 'EGG-INFO'), self.zip_safe()
+        )
+
+        if os.path.exists(os.path.join(self.egg_info, 'depends.txt')):
+            log.warn(
+                "WARNING: 'depends.txt' will not be used by setuptools 0.6!\n"
+                "Use the install_requires/extras_require setup() args instead."
+            )
+
+        if self.exclude_source_files:
+            self.zap_pyfiles()
+
+        # Make the archive
+        make_zipfile(self.egg_output, archive_root, verbose=self.verbose,
+                     dry_run=self.dry_run, mode=self.gen_header())
+        if not self.keep_temp:
+            remove_tree(self.bdist_dir, dry_run=self.dry_run)
+
+        # Add to 'Distribution.dist_files' so that the "upload" command works
+        getattr(self.distribution, 'dist_files', []).append(
+            ('bdist_egg', get_python_version(), self.egg_output))
+
+    def zap_pyfiles(self):
+        log.info("Removing .py files from temporary directory")
+        for base, dirs, files in walk_egg(self.bdist_dir):
+            for name in files:
+                path = os.path.join(base, name)
+
+                if name.endswith('.py'):
+                    log.debug("Deleting %s", path)
+                    os.unlink(path)
+
+                if base.endswith('__pycache__'):
+                    path_old = path
+
+                    pattern = r'(?P<name>.+)\.(?P<magic>[^.]+)\.pyc'
+                    m = re.match(pattern, name)
+                    path_new = os.path.join(
+                        base, os.pardir, m.group('name') + '.pyc')
+                    log.info(
+                        "Renaming file from [%s] to [%s]"
+                        % (path_old, path_new))
+                    try:
+                        os.remove(path_new)
+                    except OSError:
+                        pass
+                    os.rename(path_old, path_new)
+
+    def zip_safe(self):
+        safe = getattr(self.distribution, 'zip_safe', None)
+        if safe is not None:
+            return safe
+        log.warn("zip_safe flag not set; analyzing archive contents...")
+        return analyze_egg(self.bdist_dir, self.stubs)
+
+    def gen_header(self):
+        epm = EntryPoint.parse_map(self.distribution.entry_points or '')
+        ep = epm.get('setuptools.installation', {}).get('eggsecutable')
+        if ep is None:
+            return 'w'  # not an eggsecutable, do it the usual way.
+
+        if not ep.attrs or ep.extras:
+            raise DistutilsSetupError(
+                "eggsecutable entry point (%r) cannot have 'extras' "
+                "or refer to a module" % (ep,)
+            )
+
+        pyver = '{}.{}'.format(*sys.version_info)
+        pkg = ep.module_name
+        full = '.'.join(ep.attrs)
+        base = ep.attrs[0]
+        basename = os.path.basename(self.egg_output)
+
+        header = (
+            "#!/bin/sh\n"
+            'if [ `basename $0` = "%(basename)s" ]\n'
+            'then exec python%(pyver)s -c "'
+            "import sys, os; sys.path.insert(0, os.path.abspath('$0')); "
+            "from %(pkg)s import %(base)s; sys.exit(%(full)s())"
+            '" "$@"\n'
+            'else\n'
+            '  echo $0 is not the correct name for this egg file.\n'
+            '  echo Please rename it back to %(basename)s and try again.\n'
+            '  exec false\n'
+            'fi\n'
+        ) % locals()
+
+        if not self.dry_run:
+            mkpath(os.path.dirname(self.egg_output), dry_run=self.dry_run)
+            f = open(self.egg_output, 'w')
+            f.write(header)
+            f.close()
+        return 'a'
+
+    def copy_metadata_to(self, target_dir):
+        "Copy metadata (egg info) to the target_dir"
+        # normalize the path (so that a forward-slash in egg_info will
+        # match using startswith below)
+        norm_egg_info = os.path.normpath(self.egg_info)
+        prefix = os.path.join(norm_egg_info, '')
+        for path in self.ei_cmd.filelist.files:
+            if path.startswith(prefix):
+                target = os.path.join(target_dir, path[len(prefix):])
+                ensure_directory(target)
+                self.copy_file(path, target)
+
+    def get_ext_outputs(self):
+        """Get a list of relative paths to C extensions in the output distro"""
+
+        all_outputs = []
+        ext_outputs = []
+
+        paths = {self.bdist_dir: ''}
+        for base, dirs, files in sorted_walk(self.bdist_dir):
+            for filename in files:
+                if os.path.splitext(filename)[1].lower() in NATIVE_EXTENSIONS:
+                    all_outputs.append(paths[base] + filename)
+            for filename in dirs:
+                paths[os.path.join(base, filename)] = (paths[base] +
+                                                       filename + '/')
+
+        if self.distribution.has_ext_modules():
+            build_cmd = self.get_finalized_command('build_ext')
+            for ext in build_cmd.extensions:
+                if isinstance(ext, Library):
+                    continue
+                fullname = build_cmd.get_ext_fullname(ext.name)
+                filename = build_cmd.get_ext_filename(fullname)
+                if not os.path.basename(filename).startswith('dl-'):
+                    if os.path.exists(os.path.join(self.bdist_dir, filename)):
+                        ext_outputs.append(filename)
+
+        return all_outputs, ext_outputs
+
+
+NATIVE_EXTENSIONS = dict.fromkeys('.dll .so .dylib .pyd'.split())
+
+
+def walk_egg(egg_dir):
+    """Walk an unpacked egg's contents, skipping the metadata directory"""
+    walker = sorted_walk(egg_dir)
+    base, dirs, files = next(walker)
+    if 'EGG-INFO' in dirs:
+        dirs.remove('EGG-INFO')
+    yield base, dirs, files
+    for bdf in walker:
+        yield bdf
+
+
+def analyze_egg(egg_dir, stubs):
+    # check for existing flag in EGG-INFO
+    for flag, fn in safety_flags.items():
+        if os.path.exists(os.path.join(egg_dir, 'EGG-INFO', fn)):
+            return flag
+    if not can_scan():
+        return False
+    safe = True
+    for base, dirs, files in walk_egg(egg_dir):
+        for name in files:
+            if name.endswith('.py') or name.endswith('.pyw'):
+                continue
+            elif name.endswith('.pyc') or name.endswith('.pyo'):
+                # always scan, even if we already know we're not safe
+                safe = scan_module(egg_dir, base, name, stubs) and safe
+    return safe
+
+
+def write_safety_flag(egg_dir, safe):
+    # Write or remove zip safety flag file(s)
+    for flag, fn in safety_flags.items():
+        fn = os.path.join(egg_dir, fn)
+        if os.path.exists(fn):
+            if safe is None or bool(safe) != flag:
+                os.unlink(fn)
+        elif safe is not None and bool(safe) == flag:
+            f = open(fn, 'wt')
+            f.write('\n')
+            f.close()
+
+
+safety_flags = {
+    True: 'zip-safe',
+    False: 'not-zip-safe',
+}
+
+
+def scan_module(egg_dir, base, name, stubs):
+    """Check whether module possibly uses unsafe-for-zipfile stuff"""
+
+    filename = os.path.join(base, name)
+    if filename[:-1] in stubs:
+        return True  # Extension module
+    pkg = base[len(egg_dir) + 1:].replace(os.sep, '.')
+    module = pkg + (pkg and '.' or '') + os.path.splitext(name)[0]
+    if six.PY2:
+        skip = 8  # skip magic & date
+    elif sys.version_info < (3, 7):
+        skip = 12  # skip magic & date & file size
+    else:
+        skip = 16  # skip magic & reserved? & date & file size
+    f = open(filename, 'rb')
+    f.read(skip)
+    code = marshal.load(f)
+    f.close()
+    safe = True
+    symbols = dict.fromkeys(iter_symbols(code))
+    for bad in ['__file__', '__path__']:
+        if bad in symbols:
+            log.warn("%s: module references %s", module, bad)
+            safe = False
+    if 'inspect' in symbols:
+        for bad in [
+            'getsource', 'getabsfile', 'getsourcefile', 'getfile'
+            'getsourcelines', 'findsource', 'getcomments', 'getframeinfo',
+            'getinnerframes', 'getouterframes', 'stack', 'trace'
+        ]:
+            if bad in symbols:
+                log.warn("%s: module MAY be using inspect.%s", module, bad)
+                safe = False
+    return safe
+
+
+def iter_symbols(code):
+    """Yield names and strings used by `code` and its nested code objects"""
+    for name in code.co_names:
+        yield name
+    for const in code.co_consts:
+        if isinstance(const, six.string_types):
+            yield const
+        elif isinstance(const, CodeType):
+            for name in iter_symbols(const):
+                yield name
+
+
+def can_scan():
+    if not sys.platform.startswith('java') and sys.platform != 'cli':
+        # CPython, PyPy, etc.
+        return True
+    log.warn("Unable to analyze compiled code on this platform.")
+    log.warn("Please ask the author to include a 'zip_safe'"
+             " setting (either True or False) in the package's setup.py")
+
+
+# Attribute names of options for commands that might need to be convinced to
+# install to the egg build directory
+
+INSTALL_DIRECTORY_ATTRS = [
+    'install_lib', 'install_dir', 'install_data', 'install_base'
+]
+
+
+def make_zipfile(zip_filename, base_dir, verbose=0, dry_run=0, compress=True,
+                 mode='w'):
+    """Create a zip file from all the files under 'base_dir'.  The output
+    zip file will be named 'base_dir' + ".zip".  Uses either the "zipfile"
+    Python module (if available) or the InfoZIP "zip" utility (if installed
+    and found on the default search path).  If neither tool is available,
+    raises DistutilsExecError.  Returns the name of the output zip file.
+    """
+    import zipfile
+
+    mkpath(os.path.dirname(zip_filename), dry_run=dry_run)
+    log.info("creating '%s' and adding '%s' to it", zip_filename, base_dir)
+
+    def visit(z, dirname, names):
+        for name in names:
+            path = os.path.normpath(os.path.join(dirname, name))
+            if os.path.isfile(path):
+                p = path[len(base_dir) + 1:]
+                if not dry_run:
+                    z.write(path, p)
+                log.debug("adding '%s'", p)
+
+    compression = zipfile.ZIP_DEFLATED if compress else zipfile.ZIP_STORED
+    if not dry_run:
+        z = zipfile.ZipFile(zip_filename, mode, compression=compression)
+        for dirname, dirs, files in sorted_walk(base_dir):
+            visit(z, dirname, files)
+        z.close()
+    else:
+        for dirname, dirs, files in sorted_walk(base_dir):
+            visit(None, dirname, files)
+    return zip_filename
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/bdist_rpm.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/bdist_rpm.py
new file mode 100644
index 0000000..7073092
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/bdist_rpm.py
@@ -0,0 +1,43 @@
+import distutils.command.bdist_rpm as orig
+
+
+class bdist_rpm(orig.bdist_rpm):
+    """
+    Override the default bdist_rpm behavior to do the following:
+
+    1. Run egg_info to ensure the name and version are properly calculated.
+    2. Always run 'install' using --single-version-externally-managed to
+       disable eggs in RPM distributions.
+    3. Replace dash with underscore in the version numbers for better RPM
+       compatibility.
+    """
+
+    def run(self):
+        # ensure distro name is up-to-date
+        self.run_command('egg_info')
+
+        orig.bdist_rpm.run(self)
+
+    def _make_spec_file(self):
+        version = self.distribution.get_version()
+        rpmversion = version.replace('-', '_')
+        spec = orig.bdist_rpm._make_spec_file(self)
+        line23 = '%define version ' + version
+        line24 = '%define version ' + rpmversion
+        spec = [
+            line.replace(
+                "Source0: %{name}-%{version}.tar",
+                "Source0: %{name}-%{unmangled_version}.tar"
+            ).replace(
+                "setup.py install ",
+                "setup.py install --single-version-externally-managed "
+            ).replace(
+                "%setup",
+                "%setup -n %{name}-%{unmangled_version}"
+            ).replace(line23, line24)
+            for line in spec
+        ]
+        insert_loc = spec.index(line24) + 1
+        unmangled_version = "%define unmangled_version " + version
+        spec.insert(insert_loc, unmangled_version)
+        return spec
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/bdist_wininst.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/bdist_wininst.py
new file mode 100644
index 0000000..073de97
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/bdist_wininst.py
@@ -0,0 +1,21 @@
+import distutils.command.bdist_wininst as orig
+
+
+class bdist_wininst(orig.bdist_wininst):
+    def reinitialize_command(self, command, reinit_subcommands=0):
+        """
+        Supplement reinitialize_command to work around
+        http://bugs.python.org/issue20819
+        """
+        cmd = self.distribution.reinitialize_command(
+            command, reinit_subcommands)
+        if command in ('install', 'install_lib'):
+            cmd.install_lib = None
+        return cmd
+
+    def run(self):
+        self._is_running = True
+        try:
+            orig.bdist_wininst.run(self)
+        finally:
+            self._is_running = False
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/build_clib.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/build_clib.py
new file mode 100644
index 0000000..09caff6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/build_clib.py
@@ -0,0 +1,98 @@
+import distutils.command.build_clib as orig
+from distutils.errors import DistutilsSetupError
+from distutils import log
+from setuptools.dep_util import newer_pairwise_group
+
+
+class build_clib(orig.build_clib):
+    """
+    Override the default build_clib behaviour to do the following:
+
+    1. Implement a rudimentary timestamp-based dependency system
+       so 'compile()' doesn't run every time.
+    2. Add more keys to the 'build_info' dictionary:
+        * obj_deps - specify dependencies for each object compiled.
+                     this should be a dictionary mapping a key
+                     with the source filename to a list of
+                     dependencies. Use an empty string for global
+                     dependencies.
+        * cflags   - specify a list of additional flags to pass to
+                     the compiler.
+    """
+
+    def build_libraries(self, libraries):
+        for (lib_name, build_info) in libraries:
+            sources = build_info.get('sources')
+            if sources is None or not isinstance(sources, (list, tuple)):
+                raise DistutilsSetupError(
+                       "in 'libraries' option (library '%s'), "
+                       "'sources' must be present and must be "
+                       "a list of source filenames" % lib_name)
+            sources = list(sources)
+
+            log.info("building '%s' library", lib_name)
+
+            # Make sure everything is the correct type.
+            # obj_deps should be a dictionary of keys as sources
+            # and a list/tuple of files that are its dependencies.
+            obj_deps = build_info.get('obj_deps', dict())
+            if not isinstance(obj_deps, dict):
+                raise DistutilsSetupError(
+                       "in 'libraries' option (library '%s'), "
+                       "'obj_deps' must be a dictionary of "
+                       "type 'source: list'" % lib_name)
+            dependencies = []
+
+            # Get the global dependencies that are specified by the '' key.
+            # These will go into every source's dependency list.
+            global_deps = obj_deps.get('', list())
+            if not isinstance(global_deps, (list, tuple)):
+                raise DistutilsSetupError(
+                       "in 'libraries' option (library '%s'), "
+                       "'obj_deps' must be a dictionary of "
+                       "type 'source: list'" % lib_name)
+
+            # Build the list to be used by newer_pairwise_group
+            # each source will be auto-added to its dependencies.
+            for source in sources:
+                src_deps = [source]
+                src_deps.extend(global_deps)
+                extra_deps = obj_deps.get(source, list())
+                if not isinstance(extra_deps, (list, tuple)):
+                    raise DistutilsSetupError(
+                           "in 'libraries' option (library '%s'), "
+                           "'obj_deps' must be a dictionary of "
+                           "type 'source: list'" % lib_name)
+                src_deps.extend(extra_deps)
+                dependencies.append(src_deps)
+
+            expected_objects = self.compiler.object_filenames(
+                    sources,
+                    output_dir=self.build_temp
+                    )
+
+            if newer_pairwise_group(dependencies, expected_objects) != ([], []):
+                # First, compile the source code to object files in the library
+                # directory.  (This should probably change to putting object
+                # files in a temporary build directory.)
+                macros = build_info.get('macros')
+                include_dirs = build_info.get('include_dirs')
+                cflags = build_info.get('cflags')
+                objects = self.compiler.compile(
+                        sources,
+                        output_dir=self.build_temp,
+                        macros=macros,
+                        include_dirs=include_dirs,
+                        extra_postargs=cflags,
+                        debug=self.debug
+                        )
+
+            # Now "link" the object files together into a static library.
+            # (On Unix at least, this isn't really linking -- it just
+            # builds an archive.  Whatever.)
+            self.compiler.create_static_lib(
+                    expected_objects,
+                    lib_name,
+                    output_dir=self.build_clib,
+                    debug=self.debug
+                    )
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/build_ext.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/build_ext.py
new file mode 100644
index 0000000..daa8e4f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/build_ext.py
@@ -0,0 +1,327 @@
+import os
+import sys
+import itertools
+from distutils.command.build_ext import build_ext as _du_build_ext
+from distutils.file_util import copy_file
+from distutils.ccompiler import new_compiler
+from distutils.sysconfig import customize_compiler, get_config_var
+from distutils.errors import DistutilsError
+from distutils import log
+
+from setuptools.extension import Library
+from setuptools.extern import six
+
+if six.PY2:
+    import imp
+
+    EXTENSION_SUFFIXES = [s for s, _, tp in imp.get_suffixes() if tp == imp.C_EXTENSION]
+else:
+    from importlib.machinery import EXTENSION_SUFFIXES
+
+try:
+    # Attempt to use Cython for building extensions, if available
+    from Cython.Distutils.build_ext import build_ext as _build_ext
+    # Additionally, assert that the compiler module will load
+    # also. Ref #1229.
+    __import__('Cython.Compiler.Main')
+except ImportError:
+    _build_ext = _du_build_ext
+
+# make sure _config_vars is initialized
+get_config_var("LDSHARED")
+from distutils.sysconfig import _config_vars as _CONFIG_VARS
+
+
+def _customize_compiler_for_shlib(compiler):
+    if sys.platform == "darwin":
+        # building .dylib requires additional compiler flags on OSX; here we
+        # temporarily substitute the pyconfig.h variables so that distutils'
+        # 'customize_compiler' uses them before we build the shared libraries.
+        tmp = _CONFIG_VARS.copy()
+        try:
+            # XXX Help!  I don't have any idea whether these are right...
+            _CONFIG_VARS['LDSHARED'] = (
+                "gcc -Wl,-x -dynamiclib -undefined dynamic_lookup")
+            _CONFIG_VARS['CCSHARED'] = " -dynamiclib"
+            _CONFIG_VARS['SO'] = ".dylib"
+            customize_compiler(compiler)
+        finally:
+            _CONFIG_VARS.clear()
+            _CONFIG_VARS.update(tmp)
+    else:
+        customize_compiler(compiler)
+
+
+have_rtld = False
+use_stubs = False
+libtype = 'shared'
+
+if sys.platform == "darwin":
+    use_stubs = True
+elif os.name != 'nt':
+    try:
+        import dl
+        use_stubs = have_rtld = hasattr(dl, 'RTLD_NOW')
+    except ImportError:
+        pass
+
+if_dl = lambda s: s if have_rtld else ''
+
+
+def get_abi3_suffix():
+    """Return the file extension for an abi3-compliant Extension()"""
+    for suffix in EXTENSION_SUFFIXES:
+        if '.abi3' in suffix:  # Unix
+            return suffix
+        elif suffix == '.pyd':  # Windows
+            return suffix
+
+
+class build_ext(_build_ext):
+    def run(self):
+        """Build extensions in build directory, then copy if --inplace"""
+        old_inplace, self.inplace = self.inplace, 0
+        _build_ext.run(self)
+        self.inplace = old_inplace
+        if old_inplace:
+            self.copy_extensions_to_source()
+
+    def copy_extensions_to_source(self):
+        build_py = self.get_finalized_command('build_py')
+        for ext in self.extensions:
+            fullname = self.get_ext_fullname(ext.name)
+            filename = self.get_ext_filename(fullname)
+            modpath = fullname.split('.')
+            package = '.'.join(modpath[:-1])
+            package_dir = build_py.get_package_dir(package)
+            dest_filename = os.path.join(package_dir,
+                                         os.path.basename(filename))
+            src_filename = os.path.join(self.build_lib, filename)
+
+            # Always copy, even if source is older than destination, to ensure
+            # that the right extensions for the current Python/platform are
+            # used.
+            copy_file(
+                src_filename, dest_filename, verbose=self.verbose,
+                dry_run=self.dry_run
+            )
+            if ext._needs_stub:
+                self.write_stub(package_dir or os.curdir, ext, True)
+
+    def get_ext_filename(self, fullname):
+        filename = _build_ext.get_ext_filename(self, fullname)
+        if fullname in self.ext_map:
+            ext = self.ext_map[fullname]
+            use_abi3 = (
+                six.PY3
+                and getattr(ext, 'py_limited_api')
+                and get_abi3_suffix()
+            )
+            if use_abi3:
+                so_ext = get_config_var('EXT_SUFFIX')
+                filename = filename[:-len(so_ext)]
+                filename = filename + get_abi3_suffix()
+            if isinstance(ext, Library):
+                fn, ext = os.path.splitext(filename)
+                return self.shlib_compiler.library_filename(fn, libtype)
+            elif use_stubs and ext._links_to_dynamic:
+                d, fn = os.path.split(filename)
+                return os.path.join(d, 'dl-' + fn)
+        return filename
+
+    def initialize_options(self):
+        _build_ext.initialize_options(self)
+        self.shlib_compiler = None
+        self.shlibs = []
+        self.ext_map = {}
+
+    def finalize_options(self):
+        _build_ext.finalize_options(self)
+        self.extensions = self.extensions or []
+        self.check_extensions_list(self.extensions)
+        self.shlibs = [ext for ext in self.extensions
+                       if isinstance(ext, Library)]
+        if self.shlibs:
+            self.setup_shlib_compiler()
+        for ext in self.extensions:
+            ext._full_name = self.get_ext_fullname(ext.name)
+        for ext in self.extensions:
+            fullname = ext._full_name
+            self.ext_map[fullname] = ext
+
+            # distutils 3.1 will also ask for module names
+            # XXX what to do with conflicts?
+            self.ext_map[fullname.split('.')[-1]] = ext
+
+            ltd = self.shlibs and self.links_to_dynamic(ext) or False
+            ns = ltd and use_stubs and not isinstance(ext, Library)
+            ext._links_to_dynamic = ltd
+            ext._needs_stub = ns
+            filename = ext._file_name = self.get_ext_filename(fullname)
+            libdir = os.path.dirname(os.path.join(self.build_lib, filename))
+            if ltd and libdir not in ext.library_dirs:
+                ext.library_dirs.append(libdir)
+            if ltd and use_stubs and os.curdir not in ext.runtime_library_dirs:
+                ext.runtime_library_dirs.append(os.curdir)
+
+    def setup_shlib_compiler(self):
+        compiler = self.shlib_compiler = new_compiler(
+            compiler=self.compiler, dry_run=self.dry_run, force=self.force
+        )
+        _customize_compiler_for_shlib(compiler)
+
+        if self.include_dirs is not None:
+            compiler.set_include_dirs(self.include_dirs)
+        if self.define is not None:
+            # 'define' option is a list of (name,value) tuples
+            for (name, value) in self.define:
+                compiler.define_macro(name, value)
+        if self.undef is not None:
+            for macro in self.undef:
+                compiler.undefine_macro(macro)
+        if self.libraries is not None:
+            compiler.set_libraries(self.libraries)
+        if self.library_dirs is not None:
+            compiler.set_library_dirs(self.library_dirs)
+        if self.rpath is not None:
+            compiler.set_runtime_library_dirs(self.rpath)
+        if self.link_objects is not None:
+            compiler.set_link_objects(self.link_objects)
+
+        # hack so distutils' build_extension() builds a library instead
+        compiler.link_shared_object = link_shared_object.__get__(compiler)
+
+    def get_export_symbols(self, ext):
+        if isinstance(ext, Library):
+            return ext.export_symbols
+        return _build_ext.get_export_symbols(self, ext)
+
+    def build_extension(self, ext):
+        ext._convert_pyx_sources_to_lang()
+        _compiler = self.compiler
+        try:
+            if isinstance(ext, Library):
+                self.compiler = self.shlib_compiler
+            _build_ext.build_extension(self, ext)
+            if ext._needs_stub:
+                cmd = self.get_finalized_command('build_py').build_lib
+                self.write_stub(cmd, ext)
+        finally:
+            self.compiler = _compiler
+
+    def links_to_dynamic(self, ext):
+        """Return true if 'ext' links to a dynamic lib in the same package"""
+        # XXX this should check to ensure the lib is actually being built
+        # XXX as dynamic, and not just using a locally-found version or a
+        # XXX static-compiled version
+        libnames = dict.fromkeys([lib._full_name for lib in self.shlibs])
+        pkg = '.'.join(ext._full_name.split('.')[:-1] + [''])
+        return any(pkg + libname in libnames for libname in ext.libraries)
+
+    def get_outputs(self):
+        return _build_ext.get_outputs(self) + self.__get_stubs_outputs()
+
+    def __get_stubs_outputs(self):
+        # assemble the base name for each extension that needs a stub
+        ns_ext_bases = (
+            os.path.join(self.build_lib, *ext._full_name.split('.'))
+            for ext in self.extensions
+            if ext._needs_stub
+        )
+        # pair each base with the extension
+        pairs = itertools.product(ns_ext_bases, self.__get_output_extensions())
+        return list(base + fnext for base, fnext in pairs)
+
+    def __get_output_extensions(self):
+        yield '.py'
+        yield '.pyc'
+        if self.get_finalized_command('build_py').optimize:
+            yield '.pyo'
+
+    def write_stub(self, output_dir, ext, compile=False):
+        log.info("writing stub loader for %s to %s", ext._full_name,
+                 output_dir)
+        stub_file = (os.path.join(output_dir, *ext._full_name.split('.')) +
+                     '.py')
+        if compile and os.path.exists(stub_file):
+            raise DistutilsError(stub_file + " already exists! Please delete.")
+        if not self.dry_run:
+            f = open(stub_file, 'w')
+            f.write(
+                '\n'.join([
+                    "def __bootstrap__():",
+                    "   global __bootstrap__, __file__, __loader__",
+                    "   import sys, os, pkg_resources, imp" + if_dl(", dl"),
+                    "   __file__ = pkg_resources.resource_filename"
+                    "(__name__,%r)"
+                    % os.path.basename(ext._file_name),
+                    "   del __bootstrap__",
+                    "   if '__loader__' in globals():",
+                    "       del __loader__",
+                    if_dl("   old_flags = sys.getdlopenflags()"),
+                    "   old_dir = os.getcwd()",
+                    "   try:",
+                    "     os.chdir(os.path.dirname(__file__))",
+                    if_dl("     sys.setdlopenflags(dl.RTLD_NOW)"),
+                    "     imp.load_dynamic(__name__,__file__)",
+                    "   finally:",
+                    if_dl("     sys.setdlopenflags(old_flags)"),
+                    "     os.chdir(old_dir)",
+                    "__bootstrap__()",
+                    ""  # terminal \n
+                ])
+            )
+            f.close()
+        if compile:
+            from distutils.util import byte_compile
+
+            byte_compile([stub_file], optimize=0,
+                         force=True, dry_run=self.dry_run)
+            optimize = self.get_finalized_command('install_lib').optimize
+            if optimize > 0:
+                byte_compile([stub_file], optimize=optimize,
+                             force=True, dry_run=self.dry_run)
+            if os.path.exists(stub_file) and not self.dry_run:
+                os.unlink(stub_file)
+
+
+if use_stubs or os.name == 'nt':
+    # Build shared libraries
+    #
+    def link_shared_object(
+            self, objects, output_libname, output_dir=None, libraries=None,
+            library_dirs=None, runtime_library_dirs=None, export_symbols=None,
+            debug=0, extra_preargs=None, extra_postargs=None, build_temp=None,
+            target_lang=None):
+        self.link(
+            self.SHARED_LIBRARY, objects, output_libname,
+            output_dir, libraries, library_dirs, runtime_library_dirs,
+            export_symbols, debug, extra_preargs, extra_postargs,
+            build_temp, target_lang
+        )
+else:
+    # Build static libraries everywhere else
+    libtype = 'static'
+
+    def link_shared_object(
+            self, objects, output_libname, output_dir=None, libraries=None,
+            library_dirs=None, runtime_library_dirs=None, export_symbols=None,
+            debug=0, extra_preargs=None, extra_postargs=None, build_temp=None,
+            target_lang=None):
+        # XXX we need to either disallow these attrs on Library instances,
+        # or warn/abort here if set, or something...
+        # libraries=None, library_dirs=None, runtime_library_dirs=None,
+        # export_symbols=None, extra_preargs=None, extra_postargs=None,
+        # build_temp=None
+
+        assert output_dir is None  # distutils build_ext doesn't pass this
+        output_dir, filename = os.path.split(output_libname)
+        basename, ext = os.path.splitext(filename)
+        if self.library_filename("x").startswith('lib'):
+            # strip 'lib' prefix; this is kludgy if some platform uses
+            # a different prefix
+            basename = basename[3:]
+
+        self.create_static_lib(
+            objects, basename, output_dir, debug, target_lang
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/build_py.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/build_py.py
new file mode 100644
index 0000000..b0314fd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/build_py.py
@@ -0,0 +1,270 @@
+from glob import glob
+from distutils.util import convert_path
+import distutils.command.build_py as orig
+import os
+import fnmatch
+import textwrap
+import io
+import distutils.errors
+import itertools
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import map, filter, filterfalse
+
+try:
+    from setuptools.lib2to3_ex import Mixin2to3
+except ImportError:
+
+    class Mixin2to3:
+        def run_2to3(self, files, doctests=True):
+            "do nothing"
+
+
+class build_py(orig.build_py, Mixin2to3):
+    """Enhanced 'build_py' command that includes data files with packages
+
+    The data files are specified via a 'package_data' argument to 'setup()'.
+    See 'setuptools.dist.Distribution' for more details.
+
+    Also, this version of the 'build_py' command allows you to specify both
+    'py_modules' and 'packages' in the same setup operation.
+    """
+
+    def finalize_options(self):
+        orig.build_py.finalize_options(self)
+        self.package_data = self.distribution.package_data
+        self.exclude_package_data = (self.distribution.exclude_package_data or
+                                     {})
+        if 'data_files' in self.__dict__:
+            del self.__dict__['data_files']
+        self.__updated_files = []
+        self.__doctests_2to3 = []
+
+    def run(self):
+        """Build modules, packages, and copy data files to build directory"""
+        if not self.py_modules and not self.packages:
+            return
+
+        if self.py_modules:
+            self.build_modules()
+
+        if self.packages:
+            self.build_packages()
+            self.build_package_data()
+
+        self.run_2to3(self.__updated_files, False)
+        self.run_2to3(self.__updated_files, True)
+        self.run_2to3(self.__doctests_2to3, True)
+
+        # Only compile actual .py files, using our base class' idea of what our
+        # output files are.
+        self.byte_compile(orig.build_py.get_outputs(self, include_bytecode=0))
+
+    def __getattr__(self, attr):
+        "lazily compute data files"
+        if attr == 'data_files':
+            self.data_files = self._get_data_files()
+            return self.data_files
+        return orig.build_py.__getattr__(self, attr)
+
+    def build_module(self, module, module_file, package):
+        if six.PY2 and isinstance(package, six.string_types):
+            # avoid errors on Python 2 when unicode is passed (#190)
+            package = package.split('.')
+        outfile, copied = orig.build_py.build_module(self, module, module_file,
+                                                     package)
+        if copied:
+            self.__updated_files.append(outfile)
+        return outfile, copied
+
+    def _get_data_files(self):
+        """Generate list of '(package,src_dir,build_dir,filenames)' tuples"""
+        self.analyze_manifest()
+        return list(map(self._get_pkg_data_files, self.packages or ()))
+
+    def _get_pkg_data_files(self, package):
+        # Locate package source directory
+        src_dir = self.get_package_dir(package)
+
+        # Compute package build directory
+        build_dir = os.path.join(*([self.build_lib] + package.split('.')))
+
+        # Strip directory from globbed filenames
+        filenames = [
+            os.path.relpath(file, src_dir)
+            for file in self.find_data_files(package, src_dir)
+        ]
+        return package, src_dir, build_dir, filenames
+
+    def find_data_files(self, package, src_dir):
+        """Return filenames for package's data files in 'src_dir'"""
+        patterns = self._get_platform_patterns(
+            self.package_data,
+            package,
+            src_dir,
+        )
+        globs_expanded = map(glob, patterns)
+        # flatten the expanded globs into an iterable of matches
+        globs_matches = itertools.chain.from_iterable(globs_expanded)
+        glob_files = filter(os.path.isfile, globs_matches)
+        files = itertools.chain(
+            self.manifest_files.get(package, []),
+            glob_files,
+        )
+        return self.exclude_data_files(package, src_dir, files)
+
+    def build_package_data(self):
+        """Copy data files into build directory"""
+        for package, src_dir, build_dir, filenames in self.data_files:
+            for filename in filenames:
+                target = os.path.join(build_dir, filename)
+                self.mkpath(os.path.dirname(target))
+                srcfile = os.path.join(src_dir, filename)
+                outf, copied = self.copy_file(srcfile, target)
+                srcfile = os.path.abspath(srcfile)
+                if (copied and
+                        srcfile in self.distribution.convert_2to3_doctests):
+                    self.__doctests_2to3.append(outf)
+
+    def analyze_manifest(self):
+        self.manifest_files = mf = {}
+        if not self.distribution.include_package_data:
+            return
+        src_dirs = {}
+        for package in self.packages or ():
+            # Locate package source directory
+            src_dirs[assert_relative(self.get_package_dir(package))] = package
+
+        self.run_command('egg_info')
+        ei_cmd = self.get_finalized_command('egg_info')
+        for path in ei_cmd.filelist.files:
+            d, f = os.path.split(assert_relative(path))
+            prev = None
+            oldf = f
+            while d and d != prev and d not in src_dirs:
+                prev = d
+                d, df = os.path.split(d)
+                f = os.path.join(df, f)
+            if d in src_dirs:
+                if path.endswith('.py') and f == oldf:
+                    continue  # it's a module, not data
+                mf.setdefault(src_dirs[d], []).append(path)
+
+    def get_data_files(self):
+        pass  # Lazily compute data files in _get_data_files() function.
+
+    def check_package(self, package, package_dir):
+        """Check namespace packages' __init__ for declare_namespace"""
+        try:
+            return self.packages_checked[package]
+        except KeyError:
+            pass
+
+        init_py = orig.build_py.check_package(self, package, package_dir)
+        self.packages_checked[package] = init_py
+
+        if not init_py or not self.distribution.namespace_packages:
+            return init_py
+
+        for pkg in self.distribution.namespace_packages:
+            if pkg == package or pkg.startswith(package + '.'):
+                break
+        else:
+            return init_py
+
+        with io.open(init_py, 'rb') as f:
+            contents = f.read()
+        if b'declare_namespace' not in contents:
+            raise distutils.errors.DistutilsError(
+                "Namespace package problem: %s is a namespace package, but "
+                "its\n__init__.py does not call declare_namespace()! Please "
+                'fix it.\n(See the setuptools manual under '
+                '"Namespace Packages" for details.)\n"' % (package,)
+            )
+        return init_py
+
+    def initialize_options(self):
+        self.packages_checked = {}
+        orig.build_py.initialize_options(self)
+
+    def get_package_dir(self, package):
+        res = orig.build_py.get_package_dir(self, package)
+        if self.distribution.src_root is not None:
+            return os.path.join(self.distribution.src_root, res)
+        return res
+
+    def exclude_data_files(self, package, src_dir, files):
+        """Filter filenames for package's data files in 'src_dir'"""
+        files = list(files)
+        patterns = self._get_platform_patterns(
+            self.exclude_package_data,
+            package,
+            src_dir,
+        )
+        match_groups = (
+            fnmatch.filter(files, pattern)
+            for pattern in patterns
+        )
+        # flatten the groups of matches into an iterable of matches
+        matches = itertools.chain.from_iterable(match_groups)
+        bad = set(matches)
+        keepers = (
+            fn
+            for fn in files
+            if fn not in bad
+        )
+        # ditch dupes
+        return list(_unique_everseen(keepers))
+
+    @staticmethod
+    def _get_platform_patterns(spec, package, src_dir):
+        """
+        yield platform-specific path patterns (suitable for glob
+        or fn_match) from a glob-based spec (such as
+        self.package_data or self.exclude_package_data)
+        matching package in src_dir.
+        """
+        raw_patterns = itertools.chain(
+            spec.get('', []),
+            spec.get(package, []),
+        )
+        return (
+            # Each pattern has to be converted to a platform-specific path
+            os.path.join(src_dir, convert_path(pattern))
+            for pattern in raw_patterns
+        )
+
+
+# from Python docs
+def _unique_everseen(iterable, key=None):
+    "List unique elements, preserving order. Remember all elements ever seen."
+    # unique_everseen('AAAABBBCCDAABBB') --> A B C D
+    # unique_everseen('ABBCcAD', str.lower) --> A B C D
+    seen = set()
+    seen_add = seen.add
+    if key is None:
+        for element in filterfalse(seen.__contains__, iterable):
+            seen_add(element)
+            yield element
+    else:
+        for element in iterable:
+            k = key(element)
+            if k not in seen:
+                seen_add(k)
+                yield element
+
+
+def assert_relative(path):
+    if not os.path.isabs(path):
+        return path
+    from distutils.errors import DistutilsSetupError
+
+    msg = textwrap.dedent("""
+        Error: setup script specifies an absolute path:
+
+            %s
+
+        setup() arguments must *always* be /-separated paths relative to the
+        setup.py directory, *never* absolute paths.
+        """).lstrip() % path
+    raise DistutilsSetupError(msg)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/develop.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/develop.py
new file mode 100644
index 0000000..009e4f9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/develop.py
@@ -0,0 +1,221 @@
+from distutils.util import convert_path
+from distutils import log
+from distutils.errors import DistutilsError, DistutilsOptionError
+import os
+import glob
+import io
+
+from setuptools.extern import six
+
+import pkg_resources
+from setuptools.command.easy_install import easy_install
+from setuptools import namespaces
+import setuptools
+
+__metaclass__ = type
+
+
+class develop(namespaces.DevelopInstaller, easy_install):
+    """Set up package for development"""
+
+    description = "install package in 'development mode'"
+
+    user_options = easy_install.user_options + [
+        ("uninstall", "u", "Uninstall this source package"),
+        ("egg-path=", None, "Set the path to be used in the .egg-link file"),
+    ]
+
+    boolean_options = easy_install.boolean_options + ['uninstall']
+
+    command_consumes_arguments = False  # override base
+
+    def run(self):
+        if self.uninstall:
+            self.multi_version = True
+            self.uninstall_link()
+            self.uninstall_namespaces()
+        else:
+            self.install_for_development()
+        self.warn_deprecated_options()
+
+    def initialize_options(self):
+        self.uninstall = None
+        self.egg_path = None
+        easy_install.initialize_options(self)
+        self.setup_path = None
+        self.always_copy_from = '.'  # always copy eggs installed in curdir
+
+    def finalize_options(self):
+        ei = self.get_finalized_command("egg_info")
+        if ei.broken_egg_info:
+            template = "Please rename %r to %r before using 'develop'"
+            args = ei.egg_info, ei.broken_egg_info
+            raise DistutilsError(template % args)
+        self.args = [ei.egg_name]
+
+        easy_install.finalize_options(self)
+        self.expand_basedirs()
+        self.expand_dirs()
+        # pick up setup-dir .egg files only: no .egg-info
+        self.package_index.scan(glob.glob('*.egg'))
+
+        egg_link_fn = ei.egg_name + '.egg-link'
+        self.egg_link = os.path.join(self.install_dir, egg_link_fn)
+        self.egg_base = ei.egg_base
+        if self.egg_path is None:
+            self.egg_path = os.path.abspath(ei.egg_base)
+
+        target = pkg_resources.normalize_path(self.egg_base)
+        egg_path = pkg_resources.normalize_path(
+            os.path.join(self.install_dir, self.egg_path))
+        if egg_path != target:
+            raise DistutilsOptionError(
+                "--egg-path must be a relative path from the install"
+                " directory to " + target
+            )
+
+        # Make a distribution for the package's source
+        self.dist = pkg_resources.Distribution(
+            target,
+            pkg_resources.PathMetadata(target, os.path.abspath(ei.egg_info)),
+            project_name=ei.egg_name
+        )
+
+        self.setup_path = self._resolve_setup_path(
+            self.egg_base,
+            self.install_dir,
+            self.egg_path,
+        )
+
+    @staticmethod
+    def _resolve_setup_path(egg_base, install_dir, egg_path):
+        """
+        Generate a path from egg_base back to '.' where the
+        setup script resides and ensure that path points to the
+        setup path from $install_dir/$egg_path.
+        """
+        path_to_setup = egg_base.replace(os.sep, '/').rstrip('/')
+        if path_to_setup != os.curdir:
+            path_to_setup = '../' * (path_to_setup.count('/') + 1)
+        resolved = pkg_resources.normalize_path(
+            os.path.join(install_dir, egg_path, path_to_setup)
+        )
+        if resolved != pkg_resources.normalize_path(os.curdir):
+            raise DistutilsOptionError(
+                "Can't get a consistent path to setup script from"
+                " installation directory", resolved,
+                pkg_resources.normalize_path(os.curdir))
+        return path_to_setup
+
+    def install_for_development(self):
+        if six.PY3 and getattr(self.distribution, 'use_2to3', False):
+            # If we run 2to3 we can not do this inplace:
+
+            # Ensure metadata is up-to-date
+            self.reinitialize_command('build_py', inplace=0)
+            self.run_command('build_py')
+            bpy_cmd = self.get_finalized_command("build_py")
+            build_path = pkg_resources.normalize_path(bpy_cmd.build_lib)
+
+            # Build extensions
+            self.reinitialize_command('egg_info', egg_base=build_path)
+            self.run_command('egg_info')
+
+            self.reinitialize_command('build_ext', inplace=0)
+            self.run_command('build_ext')
+
+            # Fixup egg-link and easy-install.pth
+            ei_cmd = self.get_finalized_command("egg_info")
+            self.egg_path = build_path
+            self.dist.location = build_path
+            # XXX
+            self.dist._provider = pkg_resources.PathMetadata(
+                build_path, ei_cmd.egg_info)
+        else:
+            # Without 2to3 inplace works fine:
+            self.run_command('egg_info')
+
+            # Build extensions in-place
+            self.reinitialize_command('build_ext', inplace=1)
+            self.run_command('build_ext')
+
+        self.install_site_py()  # ensure that target dir is site-safe
+        if setuptools.bootstrap_install_from:
+            self.easy_install(setuptools.bootstrap_install_from)
+            setuptools.bootstrap_install_from = None
+
+        self.install_namespaces()
+
+        # create an .egg-link in the installation dir, pointing to our egg
+        log.info("Creating %s (link to %s)", self.egg_link, self.egg_base)
+        if not self.dry_run:
+            with open(self.egg_link, "w") as f:
+                f.write(self.egg_path + "\n" + self.setup_path)
+        # postprocess the installed distro, fixing up .pth, installing scripts,
+        # and handling requirements
+        self.process_distribution(None, self.dist, not self.no_deps)
+
+    def uninstall_link(self):
+        if os.path.exists(self.egg_link):
+            log.info("Removing %s (link to %s)", self.egg_link, self.egg_base)
+            egg_link_file = open(self.egg_link)
+            contents = [line.rstrip() for line in egg_link_file]
+            egg_link_file.close()
+            if contents not in ([self.egg_path],
+                                [self.egg_path, self.setup_path]):
+                log.warn("Link points to %s: uninstall aborted", contents)
+                return
+            if not self.dry_run:
+                os.unlink(self.egg_link)
+        if not self.dry_run:
+            self.update_pth(self.dist)  # remove any .pth link to us
+        if self.distribution.scripts:
+            # XXX should also check for entry point scripts!
+            log.warn("Note: you must uninstall or replace scripts manually!")
+
+    def install_egg_scripts(self, dist):
+        if dist is not self.dist:
+            # Installing a dependency, so fall back to normal behavior
+            return easy_install.install_egg_scripts(self, dist)
+
+        # create wrapper scripts in the script dir, pointing to dist.scripts
+
+        # new-style...
+        self.install_wrapper_scripts(dist)
+
+        # ...and old-style
+        for script_name in self.distribution.scripts or []:
+            script_path = os.path.abspath(convert_path(script_name))
+            script_name = os.path.basename(script_path)
+            with io.open(script_path) as strm:
+                script_text = strm.read()
+            self.install_script(dist, script_name, script_text, script_path)
+
+    def install_wrapper_scripts(self, dist):
+        dist = VersionlessRequirement(dist)
+        return easy_install.install_wrapper_scripts(self, dist)
+
+
+class VersionlessRequirement:
+    """
+    Adapt a pkg_resources.Distribution to simply return the project
+    name as the 'requirement' so that scripts will work across
+    multiple versions.
+
+    >>> from pkg_resources import Distribution
+    >>> dist = Distribution(project_name='foo', version='1.0')
+    >>> str(dist.as_requirement())
+    'foo==1.0'
+    >>> adapted_dist = VersionlessRequirement(dist)
+    >>> str(adapted_dist.as_requirement())
+    'foo'
+    """
+
+    def __init__(self, dist):
+        self.__dist = dist
+
+    def __getattr__(self, name):
+        return getattr(self.__dist, name)
+
+    def as_requirement(self):
+        return self.project_name
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/dist_info.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/dist_info.py
new file mode 100644
index 0000000..c45258f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/dist_info.py
@@ -0,0 +1,36 @@
+"""
+Create a dist_info directory
+As defined in the wheel specification
+"""
+
+import os
+
+from distutils.core import Command
+from distutils import log
+
+
+class dist_info(Command):
+
+    description = 'create a .dist-info directory'
+
+    user_options = [
+        ('egg-base=', 'e', "directory containing .egg-info directories"
+                           " (default: top of the source tree)"),
+    ]
+
+    def initialize_options(self):
+        self.egg_base = None
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        egg_info = self.get_finalized_command('egg_info')
+        egg_info.egg_base = self.egg_base
+        egg_info.finalize_options()
+        egg_info.run()
+        dist_info_dir = egg_info.egg_info[:-len('.egg-info')] + '.dist-info'
+        log.info("creating '{}'".format(os.path.abspath(dist_info_dir)))
+
+        bdist_wheel = self.get_finalized_command('bdist_wheel')
+        bdist_wheel.egg2dist(egg_info.egg_info, dist_info_dir)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/easy_install.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/easy_install.py
new file mode 100644
index 0000000..eb3b4bd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/easy_install.py
@@ -0,0 +1,2346 @@
+"""
+Easy Install
+------------
+
+A tool for doing automatic download/extract/build of distutils-based Python
+packages.  For detailed documentation, see the accompanying EasyInstall.txt
+file, or visit the `EasyInstall home page`__.
+
+__ https://setuptools.readthedocs.io/en/latest/easy_install.html
+
+"""
+
+from glob import glob
+from distutils.util import get_platform
+from distutils.util import convert_path, subst_vars
+from distutils.errors import (
+    DistutilsArgError, DistutilsOptionError,
+    DistutilsError, DistutilsPlatformError,
+)
+from distutils.command.install import INSTALL_SCHEMES, SCHEME_KEYS
+from distutils import log, dir_util
+from distutils.command.build_scripts import first_line_re
+from distutils.spawn import find_executable
+import sys
+import os
+import zipimport
+import shutil
+import tempfile
+import zipfile
+import re
+import stat
+import random
+import textwrap
+import warnings
+import site
+import struct
+import contextlib
+import subprocess
+import shlex
+import io
+
+
+from sysconfig import get_config_vars, get_path
+
+from setuptools import SetuptoolsDeprecationWarning
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import configparser, map
+
+from setuptools import Command
+from setuptools.sandbox import run_setup
+from setuptools.py27compat import rmtree_safe
+from setuptools.command import setopt
+from setuptools.archive_util import unpack_archive
+from setuptools.package_index import (
+    PackageIndex, parse_requirement_arg, URL_SCHEME,
+)
+from setuptools.command import bdist_egg, egg_info
+from setuptools.wheel import Wheel
+from pkg_resources import (
+    yield_lines, normalize_path, resource_string, ensure_directory,
+    get_distribution, find_distributions, Environment, Requirement,
+    Distribution, PathMetadata, EggMetadata, WorkingSet, DistributionNotFound,
+    VersionConflict, DEVELOP_DIST,
+)
+import pkg_resources.py31compat
+
+__metaclass__ = type
+
+# Turn on PEP440Warnings
+warnings.filterwarnings("default", category=pkg_resources.PEP440Warning)
+
+__all__ = [
+    'samefile', 'easy_install', 'PthDistributions', 'extract_wininst_cfg',
+    'main', 'get_exe_prefixes',
+]
+
+
+def is_64bit():
+    return struct.calcsize("P") == 8
+
+
+def samefile(p1, p2):
+    """
+    Determine if two paths reference the same file.
+
+    Augments os.path.samefile to work on Windows and
+    suppresses errors if the path doesn't exist.
+    """
+    both_exist = os.path.exists(p1) and os.path.exists(p2)
+    use_samefile = hasattr(os.path, 'samefile') and both_exist
+    if use_samefile:
+        return os.path.samefile(p1, p2)
+    norm_p1 = os.path.normpath(os.path.normcase(p1))
+    norm_p2 = os.path.normpath(os.path.normcase(p2))
+    return norm_p1 == norm_p2
+
+
+if six.PY2:
+
+    def _to_bytes(s):
+        return s
+
+    def isascii(s):
+        try:
+            six.text_type(s, 'ascii')
+            return True
+        except UnicodeError:
+            return False
+else:
+
+    def _to_bytes(s):
+        return s.encode('utf8')
+
+    def isascii(s):
+        try:
+            s.encode('ascii')
+            return True
+        except UnicodeError:
+            return False
+
+
+_one_liner = lambda text: textwrap.dedent(text).strip().replace('\n', '; ')
+
+
+class easy_install(Command):
+    """Manage a download/build/install process"""
+    description = "Find/get/install Python packages"
+    command_consumes_arguments = True
+
+    user_options = [
+        ('prefix=', None, "installation prefix"),
+        ("zip-ok", "z", "install package as a zipfile"),
+        ("multi-version", "m", "make apps have to require() a version"),
+        ("upgrade", "U", "force upgrade (searches PyPI for latest versions)"),
+        ("install-dir=", "d", "install package to DIR"),
+        ("script-dir=", "s", "install scripts to DIR"),
+        ("exclude-scripts", "x", "Don't install scripts"),
+        ("always-copy", "a", "Copy all needed packages to install dir"),
+        ("index-url=", "i", "base URL of Python Package Index"),
+        ("find-links=", "f", "additional URL(s) to search for packages"),
+        ("build-directory=", "b",
+         "download/extract/build in DIR; keep the results"),
+        ('optimize=', 'O',
+         "also compile with optimization: -O1 for \"python -O\", "
+         "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
+        ('record=', None,
+         "filename in which to record list of installed files"),
+        ('always-unzip', 'Z', "don't install as a zipfile, no matter what"),
+        ('site-dirs=', 'S', "list of directories where .pth files work"),
+        ('editable', 'e', "Install specified packages in editable form"),
+        ('no-deps', 'N', "don't install dependencies"),
+        ('allow-hosts=', 'H', "pattern(s) that hostnames must match"),
+        ('local-snapshots-ok', 'l',
+         "allow building eggs from local checkouts"),
+        ('version', None, "print version information and exit"),
+        ('no-find-links', None,
+         "Don't load find-links defined in packages being installed")
+    ]
+    boolean_options = [
+        'zip-ok', 'multi-version', 'exclude-scripts', 'upgrade', 'always-copy',
+        'editable',
+        'no-deps', 'local-snapshots-ok', 'version'
+    ]
+
+    if site.ENABLE_USER_SITE:
+        help_msg = "install in user site-package '%s'" % site.USER_SITE
+        user_options.append(('user', None, help_msg))
+        boolean_options.append('user')
+
+    negative_opt = {'always-unzip': 'zip-ok'}
+    create_index = PackageIndex
+
+    def initialize_options(self):
+        # the --user option seems to be an opt-in one,
+        # so the default should be False.
+        self.user = 0
+        self.zip_ok = self.local_snapshots_ok = None
+        self.install_dir = self.script_dir = self.exclude_scripts = None
+        self.index_url = None
+        self.find_links = None
+        self.build_directory = None
+        self.args = None
+        self.optimize = self.record = None
+        self.upgrade = self.always_copy = self.multi_version = None
+        self.editable = self.no_deps = self.allow_hosts = None
+        self.root = self.prefix = self.no_report = None
+        self.version = None
+        self.install_purelib = None  # for pure module distributions
+        self.install_platlib = None  # non-pure (dists w/ extensions)
+        self.install_headers = None  # for C/C++ headers
+        self.install_lib = None  # set to either purelib or platlib
+        self.install_scripts = None
+        self.install_data = None
+        self.install_base = None
+        self.install_platbase = None
+        if site.ENABLE_USER_SITE:
+            self.install_userbase = site.USER_BASE
+            self.install_usersite = site.USER_SITE
+        else:
+            self.install_userbase = None
+            self.install_usersite = None
+        self.no_find_links = None
+
+        # Options not specifiable via command line
+        self.package_index = None
+        self.pth_file = self.always_copy_from = None
+        self.site_dirs = None
+        self.installed_projects = {}
+        self.sitepy_installed = False
+        # Always read easy_install options, even if we are subclassed, or have
+        # an independent instance created.  This ensures that defaults will
+        # always come from the standard configuration file(s)' "easy_install"
+        # section, even if this is a "develop" or "install" command, or some
+        # other embedding.
+        self._dry_run = None
+        self.verbose = self.distribution.verbose
+        self.distribution._set_command_options(
+            self, self.distribution.get_option_dict('easy_install')
+        )
+
+    def delete_blockers(self, blockers):
+        extant_blockers = (
+            filename for filename in blockers
+            if os.path.exists(filename) or os.path.islink(filename)
+        )
+        list(map(self._delete_path, extant_blockers))
+
+    def _delete_path(self, path):
+        log.info("Deleting %s", path)
+        if self.dry_run:
+            return
+
+        is_tree = os.path.isdir(path) and not os.path.islink(path)
+        remover = rmtree if is_tree else os.unlink
+        remover(path)
+
+    @staticmethod
+    def _render_version():
+        """
+        Render the Setuptools version and installation details, then exit.
+        """
+        ver = '{}.{}'.format(*sys.version_info)
+        dist = get_distribution('setuptools')
+        tmpl = 'setuptools {dist.version} from {dist.location} (Python {ver})'
+        print(tmpl.format(**locals()))
+        raise SystemExit()
+
+    def finalize_options(self):
+        self.version and self._render_version()
+
+        py_version = sys.version.split()[0]
+        prefix, exec_prefix = get_config_vars('prefix', 'exec_prefix')
+
+        self.config_vars = {
+            'dist_name': self.distribution.get_name(),
+            'dist_version': self.distribution.get_version(),
+            'dist_fullname': self.distribution.get_fullname(),
+            'py_version': py_version,
+            'py_version_short': py_version[0:3],
+            'py_version_nodot': py_version[0] + py_version[2],
+            'sys_prefix': prefix,
+            'prefix': prefix,
+            'sys_exec_prefix': exec_prefix,
+            'exec_prefix': exec_prefix,
+            # Only python 3.2+ has abiflags
+            'abiflags': getattr(sys, 'abiflags', ''),
+        }
+
+        if site.ENABLE_USER_SITE:
+            self.config_vars['userbase'] = self.install_userbase
+            self.config_vars['usersite'] = self.install_usersite
+
+        self._fix_install_dir_for_user_site()
+
+        self.expand_basedirs()
+        self.expand_dirs()
+
+        self._expand(
+            'install_dir', 'script_dir', 'build_directory',
+            'site_dirs',
+        )
+        # If a non-default installation directory was specified, default the
+        # script directory to match it.
+        if self.script_dir is None:
+            self.script_dir = self.install_dir
+
+        if self.no_find_links is None:
+            self.no_find_links = False
+
+        # Let install_dir get set by install_lib command, which in turn
+        # gets its info from the install command, and takes into account
+        # --prefix and --home and all that other crud.
+        self.set_undefined_options(
+            'install_lib', ('install_dir', 'install_dir')
+        )
+        # Likewise, set default script_dir from 'install_scripts.install_dir'
+        self.set_undefined_options(
+            'install_scripts', ('install_dir', 'script_dir')
+        )
+
+        if self.user and self.install_purelib:
+            self.install_dir = self.install_purelib
+            self.script_dir = self.install_scripts
+        # default --record from the install command
+        self.set_undefined_options('install', ('record', 'record'))
+        # Should this be moved to the if statement below? It's not used
+        # elsewhere
+        normpath = map(normalize_path, sys.path)
+        self.all_site_dirs = get_site_dirs()
+        if self.site_dirs is not None:
+            site_dirs = [
+                os.path.expanduser(s.strip()) for s in
+                self.site_dirs.split(',')
+            ]
+            for d in site_dirs:
+                if not os.path.isdir(d):
+                    log.warn("%s (in --site-dirs) does not exist", d)
+                elif normalize_path(d) not in normpath:
+                    raise DistutilsOptionError(
+                        d + " (in --site-dirs) is not on sys.path"
+                    )
+                else:
+                    self.all_site_dirs.append(normalize_path(d))
+        if not self.editable:
+            self.check_site_dir()
+        self.index_url = self.index_url or "https://pypi.org/simple/"
+        self.shadow_path = self.all_site_dirs[:]
+        for path_item in self.install_dir, normalize_path(self.script_dir):
+            if path_item not in self.shadow_path:
+                self.shadow_path.insert(0, path_item)
+
+        if self.allow_hosts is not None:
+            hosts = [s.strip() for s in self.allow_hosts.split(',')]
+        else:
+            hosts = ['*']
+        if self.package_index is None:
+            self.package_index = self.create_index(
+                self.index_url, search_path=self.shadow_path, hosts=hosts,
+            )
+        self.local_index = Environment(self.shadow_path + sys.path)
+
+        if self.find_links is not None:
+            if isinstance(self.find_links, six.string_types):
+                self.find_links = self.find_links.split()
+        else:
+            self.find_links = []
+        if self.local_snapshots_ok:
+            self.package_index.scan_egg_links(self.shadow_path + sys.path)
+        if not self.no_find_links:
+            self.package_index.add_find_links(self.find_links)
+        self.set_undefined_options('install_lib', ('optimize', 'optimize'))
+        if not isinstance(self.optimize, int):
+            try:
+                self.optimize = int(self.optimize)
+                if not (0 <= self.optimize <= 2):
+                    raise ValueError
+            except ValueError:
+                raise DistutilsOptionError("--optimize must be 0, 1, or 2")
+
+        if self.editable and not self.build_directory:
+            raise DistutilsArgError(
+                "Must specify a build directory (-b) when using --editable"
+            )
+        if not self.args:
+            raise DistutilsArgError(
+                "No urls, filenames, or requirements specified (see --help)")
+
+        self.outputs = []
+
+    def _fix_install_dir_for_user_site(self):
+        """
+        Fix the install_dir if "--user" was used.
+        """
+        if not self.user or not site.ENABLE_USER_SITE:
+            return
+
+        self.create_home_path()
+        if self.install_userbase is None:
+            msg = "User base directory is not specified"
+            raise DistutilsPlatformError(msg)
+        self.install_base = self.install_platbase = self.install_userbase
+        scheme_name = os.name.replace('posix', 'unix') + '_user'
+        self.select_scheme(scheme_name)
+
+    def _expand_attrs(self, attrs):
+        for attr in attrs:
+            val = getattr(self, attr)
+            if val is not None:
+                if os.name == 'posix' or os.name == 'nt':
+                    val = os.path.expanduser(val)
+                val = subst_vars(val, self.config_vars)
+                setattr(self, attr, val)
+
+    def expand_basedirs(self):
+        """Calls `os.path.expanduser` on install_base, install_platbase and
+        root."""
+        self._expand_attrs(['install_base', 'install_platbase', 'root'])
+
+    def expand_dirs(self):
+        """Calls `os.path.expanduser` on install dirs."""
+        dirs = [
+            'install_purelib',
+            'install_platlib',
+            'install_lib',
+            'install_headers',
+            'install_scripts',
+            'install_data',
+        ]
+        self._expand_attrs(dirs)
+
+    def run(self):
+        if self.verbose != self.distribution.verbose:
+            log.set_verbosity(self.verbose)
+        try:
+            for spec in self.args:
+                self.easy_install(spec, not self.no_deps)
+            if self.record:
+                outputs = self.outputs
+                if self.root:  # strip any package prefix
+                    root_len = len(self.root)
+                    for counter in range(len(outputs)):
+                        outputs[counter] = outputs[counter][root_len:]
+                from distutils import file_util
+
+                self.execute(
+                    file_util.write_file, (self.record, outputs),
+                    "writing list of installed files to '%s'" %
+                    self.record
+                )
+            self.warn_deprecated_options()
+        finally:
+            log.set_verbosity(self.distribution.verbose)
+
+    def pseudo_tempname(self):
+        """Return a pseudo-tempname base in the install directory.
+        This code is intentionally naive; if a malicious party can write to
+        the target directory you're already in deep doodoo.
+        """
+        try:
+            pid = os.getpid()
+        except Exception:
+            pid = random.randint(0, sys.maxsize)
+        return os.path.join(self.install_dir, "test-easy-install-%s" % pid)
+
+    def warn_deprecated_options(self):
+        pass
+
+    def check_site_dir(self):
+        """Verify that self.install_dir is .pth-capable dir, if needed"""
+
+        instdir = normalize_path(self.install_dir)
+        pth_file = os.path.join(instdir, 'easy-install.pth')
+
+        if not os.path.exists(instdir):
+            try:
+                os.makedirs(instdir)
+            except (OSError, IOError):
+                self.cant_write_to_target()
+
+        # Is it a configured, PYTHONPATH, implicit, or explicit site dir?
+        is_site_dir = instdir in self.all_site_dirs
+
+        if not is_site_dir and not self.multi_version:
+            # No?  Then directly test whether it does .pth file processing
+            is_site_dir = self.check_pth_processing()
+        else:
+            # make sure we can write to target dir
+            testfile = self.pseudo_tempname() + '.write-test'
+            test_exists = os.path.exists(testfile)
+            try:
+                if test_exists:
+                    os.unlink(testfile)
+                open(testfile, 'w').close()
+                os.unlink(testfile)
+            except (OSError, IOError):
+                self.cant_write_to_target()
+
+        if not is_site_dir and not self.multi_version:
+            # Can't install non-multi to non-site dir
+            raise DistutilsError(self.no_default_version_msg())
+
+        if is_site_dir:
+            if self.pth_file is None:
+                self.pth_file = PthDistributions(pth_file, self.all_site_dirs)
+        else:
+            self.pth_file = None
+
+        if instdir not in map(normalize_path, _pythonpath()):
+            # only PYTHONPATH dirs need a site.py, so pretend it's there
+            self.sitepy_installed = True
+        elif self.multi_version and not os.path.exists(pth_file):
+            self.sitepy_installed = True  # don't need site.py in this case
+            self.pth_file = None  # and don't create a .pth file
+        self.install_dir = instdir
+
+    __cant_write_msg = textwrap.dedent("""
+        can't create or remove files in install directory
+
+        The following error occurred while trying to add or remove files in the
+        installation directory:
+
+            %s
+
+        The installation directory you specified (via --install-dir, --prefix, or
+        the distutils default setting) was:
+
+            %s
+        """).lstrip()
+
+    __not_exists_id = textwrap.dedent("""
+        This directory does not currently exist.  Please create it and try again, or
+        choose a different installation directory (using the -d or --install-dir
+        option).
+        """).lstrip()
+
+    __access_msg = textwrap.dedent("""
+        Perhaps your account does not have write access to this directory?  If the
+        installation directory is a system-owned directory, you may need to sign in
+        as the administrator or "root" account.  If you do not have administrative
+        access to this machine, you may wish to choose a different installation
+        directory, preferably one that is listed in your PYTHONPATH environment
+        variable.
+
+        For information on other options, you may wish to consult the
+        documentation at:
+
+          https://setuptools.readthedocs.io/en/latest/easy_install.html
+
+        Please make the appropriate changes for your system and try again.
+        """).lstrip()
+
+    def cant_write_to_target(self):
+        msg = self.__cant_write_msg % (sys.exc_info()[1], self.install_dir,)
+
+        if not os.path.exists(self.install_dir):
+            msg += '\n' + self.__not_exists_id
+        else:
+            msg += '\n' + self.__access_msg
+        raise DistutilsError(msg)
+
+    def check_pth_processing(self):
+        """Empirically verify whether .pth files are supported in inst. dir"""
+        instdir = self.install_dir
+        log.info("Checking .pth file support in %s", instdir)
+        pth_file = self.pseudo_tempname() + ".pth"
+        ok_file = pth_file + '.ok'
+        ok_exists = os.path.exists(ok_file)
+        tmpl = _one_liner("""
+            import os
+            f = open({ok_file!r}, 'w')
+            f.write('OK')
+            f.close()
+            """) + '\n'
+        try:
+            if ok_exists:
+                os.unlink(ok_file)
+            dirname = os.path.dirname(ok_file)
+            pkg_resources.py31compat.makedirs(dirname, exist_ok=True)
+            f = open(pth_file, 'w')
+        except (OSError, IOError):
+            self.cant_write_to_target()
+        else:
+            try:
+                f.write(tmpl.format(**locals()))
+                f.close()
+                f = None
+                executable = sys.executable
+                if os.name == 'nt':
+                    dirname, basename = os.path.split(executable)
+                    alt = os.path.join(dirname, 'pythonw.exe')
+                    use_alt = (
+                        basename.lower() == 'python.exe' and
+                        os.path.exists(alt)
+                    )
+                    if use_alt:
+                        # use pythonw.exe to avoid opening a console window
+                        executable = alt
+
+                from distutils.spawn import spawn
+
+                spawn([executable, '-E', '-c', 'pass'], 0)
+
+                if os.path.exists(ok_file):
+                    log.info(
+                        "TEST PASSED: %s appears to support .pth files",
+                        instdir
+                    )
+                    return True
+            finally:
+                if f:
+                    f.close()
+                if os.path.exists(ok_file):
+                    os.unlink(ok_file)
+                if os.path.exists(pth_file):
+                    os.unlink(pth_file)
+        if not self.multi_version:
+            log.warn("TEST FAILED: %s does NOT support .pth files", instdir)
+        return False
+
+    def install_egg_scripts(self, dist):
+        """Write all the scripts for `dist`, unless scripts are excluded"""
+        if not self.exclude_scripts and dist.metadata_isdir('scripts'):
+            for script_name in dist.metadata_listdir('scripts'):
+                if dist.metadata_isdir('scripts/' + script_name):
+                    # The "script" is a directory, likely a Python 3
+                    # __pycache__ directory, so skip it.
+                    continue
+                self.install_script(
+                    dist, script_name,
+                    dist.get_metadata('scripts/' + script_name)
+                )
+        self.install_wrapper_scripts(dist)
+
+    def add_output(self, path):
+        if os.path.isdir(path):
+            for base, dirs, files in os.walk(path):
+                for filename in files:
+                    self.outputs.append(os.path.join(base, filename))
+        else:
+            self.outputs.append(path)
+
+    def not_editable(self, spec):
+        if self.editable:
+            raise DistutilsArgError(
+                "Invalid argument %r: you can't use filenames or URLs "
+                "with --editable (except via the --find-links option)."
+                % (spec,)
+            )
+
+    def check_editable(self, spec):
+        if not self.editable:
+            return
+
+        if os.path.exists(os.path.join(self.build_directory, spec.key)):
+            raise DistutilsArgError(
+                "%r already exists in %s; can't do a checkout there" %
+                (spec.key, self.build_directory)
+            )
+
+    @contextlib.contextmanager
+    def _tmpdir(self):
+        tmpdir = tempfile.mkdtemp(prefix=u"easy_install-")
+        try:
+            # cast to str as workaround for #709 and #710 and #712
+            yield str(tmpdir)
+        finally:
+            os.path.exists(tmpdir) and rmtree(rmtree_safe(tmpdir))
+
+    def easy_install(self, spec, deps=False):
+        if not self.editable:
+            self.install_site_py()
+
+        with self._tmpdir() as tmpdir:
+            if not isinstance(spec, Requirement):
+                if URL_SCHEME(spec):
+                    # It's a url, download it to tmpdir and process
+                    self.not_editable(spec)
+                    dl = self.package_index.download(spec, tmpdir)
+                    return self.install_item(None, dl, tmpdir, deps, True)
+
+                elif os.path.exists(spec):
+                    # Existing file or directory, just process it directly
+                    self.not_editable(spec)
+                    return self.install_item(None, spec, tmpdir, deps, True)
+                else:
+                    spec = parse_requirement_arg(spec)
+
+            self.check_editable(spec)
+            dist = self.package_index.fetch_distribution(
+                spec, tmpdir, self.upgrade, self.editable,
+                not self.always_copy, self.local_index
+            )
+            if dist is None:
+                msg = "Could not find suitable distribution for %r" % spec
+                if self.always_copy:
+                    msg += " (--always-copy skips system and development eggs)"
+                raise DistutilsError(msg)
+            elif dist.precedence == DEVELOP_DIST:
+                # .egg-info dists don't need installing, just process deps
+                self.process_distribution(spec, dist, deps, "Using")
+                return dist
+            else:
+                return self.install_item(spec, dist.location, tmpdir, deps)
+
+    def install_item(self, spec, download, tmpdir, deps, install_needed=False):
+
+        # Installation is also needed if file in tmpdir or is not an egg
+        install_needed = install_needed or self.always_copy
+        install_needed = install_needed or os.path.dirname(download) == tmpdir
+        install_needed = install_needed or not download.endswith('.egg')
+        install_needed = install_needed or (
+            self.always_copy_from is not None and
+            os.path.dirname(normalize_path(download)) ==
+            normalize_path(self.always_copy_from)
+        )
+
+        if spec and not install_needed:
+            # at this point, we know it's a local .egg, we just don't know if
+            # it's already installed.
+            for dist in self.local_index[spec.project_name]:
+                if dist.location == download:
+                    break
+            else:
+                install_needed = True  # it's not in the local index
+
+        log.info("Processing %s", os.path.basename(download))
+
+        if install_needed:
+            dists = self.install_eggs(spec, download, tmpdir)
+            for dist in dists:
+                self.process_distribution(spec, dist, deps)
+        else:
+            dists = [self.egg_distribution(download)]
+            self.process_distribution(spec, dists[0], deps, "Using")
+
+        if spec is not None:
+            for dist in dists:
+                if dist in spec:
+                    return dist
+
+    def select_scheme(self, name):
+        """Sets the install directories by applying the install schemes."""
+        # it's the caller's problem if they supply a bad name!
+        scheme = INSTALL_SCHEMES[name]
+        for key in SCHEME_KEYS:
+            attrname = 'install_' + key
+            if getattr(self, attrname) is None:
+                setattr(self, attrname, scheme[key])
+
+    def process_distribution(self, requirement, dist, deps=True, *info):
+        self.update_pth(dist)
+        self.package_index.add(dist)
+        if dist in self.local_index[dist.key]:
+            self.local_index.remove(dist)
+        self.local_index.add(dist)
+        self.install_egg_scripts(dist)
+        self.installed_projects[dist.key] = dist
+        log.info(self.installation_report(requirement, dist, *info))
+        if (dist.has_metadata('dependency_links.txt') and
+                not self.no_find_links):
+            self.package_index.add_find_links(
+                dist.get_metadata_lines('dependency_links.txt')
+            )
+        if not deps and not self.always_copy:
+            return
+        elif requirement is not None and dist.key != requirement.key:
+            log.warn("Skipping dependencies for %s", dist)
+            return  # XXX this is not the distribution we were looking for
+        elif requirement is None or dist not in requirement:
+            # if we wound up with a different version, resolve what we've got
+            distreq = dist.as_requirement()
+            requirement = Requirement(str(distreq))
+        log.info("Processing dependencies for %s", requirement)
+        try:
+            distros = WorkingSet([]).resolve(
+                [requirement], self.local_index, self.easy_install
+            )
+        except DistributionNotFound as e:
+            raise DistutilsError(str(e))
+        except VersionConflict as e:
+            raise DistutilsError(e.report())
+        if self.always_copy or self.always_copy_from:
+            # Force all the relevant distros to be copied or activated
+            for dist in distros:
+                if dist.key not in self.installed_projects:
+                    self.easy_install(dist.as_requirement())
+        log.info("Finished processing dependencies for %s", requirement)
+
+    def should_unzip(self, dist):
+        if self.zip_ok is not None:
+            return not self.zip_ok
+        if dist.has_metadata('not-zip-safe'):
+            return True
+        if not dist.has_metadata('zip-safe'):
+            return True
+        return False
+
+    def maybe_move(self, spec, dist_filename, setup_base):
+        dst = os.path.join(self.build_directory, spec.key)
+        if os.path.exists(dst):
+            msg = (
+                "%r already exists in %s; build directory %s will not be kept"
+            )
+            log.warn(msg, spec.key, self.build_directory, setup_base)
+            return setup_base
+        if os.path.isdir(dist_filename):
+            setup_base = dist_filename
+        else:
+            if os.path.dirname(dist_filename) == setup_base:
+                os.unlink(dist_filename)  # get it out of the tmp dir
+            contents = os.listdir(setup_base)
+            if len(contents) == 1:
+                dist_filename = os.path.join(setup_base, contents[0])
+                if os.path.isdir(dist_filename):
+                    # if the only thing there is a directory, move it instead
+                    setup_base = dist_filename
+        ensure_directory(dst)
+        shutil.move(setup_base, dst)
+        return dst
+
+    def install_wrapper_scripts(self, dist):
+        if self.exclude_scripts:
+            return
+        for args in ScriptWriter.best().get_args(dist):
+            self.write_script(*args)
+
+    def install_script(self, dist, script_name, script_text, dev_path=None):
+        """Generate a legacy script wrapper and install it"""
+        spec = str(dist.as_requirement())
+        is_script = is_python_script(script_text, script_name)
+
+        if is_script:
+            body = self._load_template(dev_path) % locals()
+            script_text = ScriptWriter.get_header(script_text) + body
+        self.write_script(script_name, _to_bytes(script_text), 'b')
+
+    @staticmethod
+    def _load_template(dev_path):
+        """
+        There are a couple of template scripts in the package. This
+        function loads one of them and prepares it for use.
+        """
+        # See https://github.com/pypa/setuptools/issues/134 for info
+        # on script file naming and downstream issues with SVR4
+        name = 'script.tmpl'
+        if dev_path:
+            name = name.replace('.tmpl', ' (dev).tmpl')
+
+        raw_bytes = resource_string('setuptools', name)
+        return raw_bytes.decode('utf-8')
+
+    def write_script(self, script_name, contents, mode="t", blockers=()):
+        """Write an executable file to the scripts directory"""
+        self.delete_blockers(  # clean up old .py/.pyw w/o a script
+            [os.path.join(self.script_dir, x) for x in blockers]
+        )
+        log.info("Installing %s script to %s", script_name, self.script_dir)
+        target = os.path.join(self.script_dir, script_name)
+        self.add_output(target)
+
+        if self.dry_run:
+            return
+
+        mask = current_umask()
+        ensure_directory(target)
+        if os.path.exists(target):
+            os.unlink(target)
+        with open(target, "w" + mode) as f:
+            f.write(contents)
+        chmod(target, 0o777 - mask)
+
+    def install_eggs(self, spec, dist_filename, tmpdir):
+        # .egg dirs or files are already built, so just return them
+        if dist_filename.lower().endswith('.egg'):
+            return [self.install_egg(dist_filename, tmpdir)]
+        elif dist_filename.lower().endswith('.exe'):
+            return [self.install_exe(dist_filename, tmpdir)]
+        elif dist_filename.lower().endswith('.whl'):
+            return [self.install_wheel(dist_filename, tmpdir)]
+
+        # Anything else, try to extract and build
+        setup_base = tmpdir
+        if os.path.isfile(dist_filename) and not dist_filename.endswith('.py'):
+            unpack_archive(dist_filename, tmpdir, self.unpack_progress)
+        elif os.path.isdir(dist_filename):
+            setup_base = os.path.abspath(dist_filename)
+
+        if (setup_base.startswith(tmpdir)  # something we downloaded
+                and self.build_directory and spec is not None):
+            setup_base = self.maybe_move(spec, dist_filename, setup_base)
+
+        # Find the setup.py file
+        setup_script = os.path.join(setup_base, 'setup.py')
+
+        if not os.path.exists(setup_script):
+            setups = glob(os.path.join(setup_base, '*', 'setup.py'))
+            if not setups:
+                raise DistutilsError(
+                    "Couldn't find a setup script in %s" %
+                    os.path.abspath(dist_filename)
+                )
+            if len(setups) > 1:
+                raise DistutilsError(
+                    "Multiple setup scripts in %s" %
+                    os.path.abspath(dist_filename)
+                )
+            setup_script = setups[0]
+
+        # Now run it, and return the result
+        if self.editable:
+            log.info(self.report_editable(spec, setup_script))
+            return []
+        else:
+            return self.build_and_install(setup_script, setup_base)
+
+    def egg_distribution(self, egg_path):
+        if os.path.isdir(egg_path):
+            metadata = PathMetadata(egg_path, os.path.join(egg_path,
+                                                           'EGG-INFO'))
+        else:
+            metadata = EggMetadata(zipimport.zipimporter(egg_path))
+        return Distribution.from_filename(egg_path, metadata=metadata)
+
+    def install_egg(self, egg_path, tmpdir):
+        destination = os.path.join(
+            self.install_dir,
+            os.path.basename(egg_path),
+        )
+        destination = os.path.abspath(destination)
+        if not self.dry_run:
+            ensure_directory(destination)
+
+        dist = self.egg_distribution(egg_path)
+        if not samefile(egg_path, destination):
+            if os.path.isdir(destination) and not os.path.islink(destination):
+                dir_util.remove_tree(destination, dry_run=self.dry_run)
+            elif os.path.exists(destination):
+                self.execute(
+                    os.unlink,
+                    (destination,),
+                    "Removing " + destination,
+                )
+            try:
+                new_dist_is_zipped = False
+                if os.path.isdir(egg_path):
+                    if egg_path.startswith(tmpdir):
+                        f, m = shutil.move, "Moving"
+                    else:
+                        f, m = shutil.copytree, "Copying"
+                elif self.should_unzip(dist):
+                    self.mkpath(destination)
+                    f, m = self.unpack_and_compile, "Extracting"
+                else:
+                    new_dist_is_zipped = True
+                    if egg_path.startswith(tmpdir):
+                        f, m = shutil.move, "Moving"
+                    else:
+                        f, m = shutil.copy2, "Copying"
+                self.execute(
+                    f,
+                    (egg_path, destination),
+                    (m + " %s to %s") % (
+                        os.path.basename(egg_path),
+                        os.path.dirname(destination)
+                    ),
+                )
+                update_dist_caches(
+                    destination,
+                    fix_zipimporter_caches=new_dist_is_zipped,
+                )
+            except Exception:
+                update_dist_caches(destination, fix_zipimporter_caches=False)
+                raise
+
+        self.add_output(destination)
+        return self.egg_distribution(destination)
+
+    def install_exe(self, dist_filename, tmpdir):
+        # See if it's valid, get data
+        cfg = extract_wininst_cfg(dist_filename)
+        if cfg is None:
+            raise DistutilsError(
+                "%s is not a valid distutils Windows .exe" % dist_filename
+            )
+        # Create a dummy distribution object until we build the real distro
+        dist = Distribution(
+            None,
+            project_name=cfg.get('metadata', 'name'),
+            version=cfg.get('metadata', 'version'), platform=get_platform(),
+        )
+
+        # Convert the .exe to an unpacked egg
+        egg_path = os.path.join(tmpdir, dist.egg_name() + '.egg')
+        dist.location = egg_path
+        egg_tmp = egg_path + '.tmp'
+        _egg_info = os.path.join(egg_tmp, 'EGG-INFO')
+        pkg_inf = os.path.join(_egg_info, 'PKG-INFO')
+        ensure_directory(pkg_inf)  # make sure EGG-INFO dir exists
+        dist._provider = PathMetadata(egg_tmp, _egg_info)  # XXX
+        self.exe_to_egg(dist_filename, egg_tmp)
+
+        # Write EGG-INFO/PKG-INFO
+        if not os.path.exists(pkg_inf):
+            f = open(pkg_inf, 'w')
+            f.write('Metadata-Version: 1.0\n')
+            for k, v in cfg.items('metadata'):
+                if k != 'target_version':
+                    f.write('%s: %s\n' % (k.replace('_', '-').title(), v))
+            f.close()
+        script_dir = os.path.join(_egg_info, 'scripts')
+        # delete entry-point scripts to avoid duping
+        self.delete_blockers([
+            os.path.join(script_dir, args[0])
+            for args in ScriptWriter.get_args(dist)
+        ])
+        # Build .egg file from tmpdir
+        bdist_egg.make_zipfile(
+            egg_path, egg_tmp, verbose=self.verbose, dry_run=self.dry_run,
+        )
+        # install the .egg
+        return self.install_egg(egg_path, tmpdir)
+
+    def exe_to_egg(self, dist_filename, egg_tmp):
+        """Extract a bdist_wininst to the directories an egg would use"""
+        # Check for .pth file and set up prefix translations
+        prefixes = get_exe_prefixes(dist_filename)
+        to_compile = []
+        native_libs = []
+        top_level = {}
+
+        def process(src, dst):
+            s = src.lower()
+            for old, new in prefixes:
+                if s.startswith(old):
+                    src = new + src[len(old):]
+                    parts = src.split('/')
+                    dst = os.path.join(egg_tmp, *parts)
+                    dl = dst.lower()
+                    if dl.endswith('.pyd') or dl.endswith('.dll'):
+                        parts[-1] = bdist_egg.strip_module(parts[-1])
+                        top_level[os.path.splitext(parts[0])[0]] = 1
+                        native_libs.append(src)
+                    elif dl.endswith('.py') and old != 'SCRIPTS/':
+                        top_level[os.path.splitext(parts[0])[0]] = 1
+                        to_compile.append(dst)
+                    return dst
+            if not src.endswith('.pth'):
+                log.warn("WARNING: can't process %s", src)
+            return None
+
+        # extract, tracking .pyd/.dll->native_libs and .py -> to_compile
+        unpack_archive(dist_filename, egg_tmp, process)
+        stubs = []
+        for res in native_libs:
+            if res.lower().endswith('.pyd'):  # create stubs for .pyd's
+                parts = res.split('/')
+                resource = parts[-1]
+                parts[-1] = bdist_egg.strip_module(parts[-1]) + '.py'
+                pyfile = os.path.join(egg_tmp, *parts)
+                to_compile.append(pyfile)
+                stubs.append(pyfile)
+                bdist_egg.write_stub(resource, pyfile)
+        self.byte_compile(to_compile)  # compile .py's
+        bdist_egg.write_safety_flag(
+            os.path.join(egg_tmp, 'EGG-INFO'),
+            bdist_egg.analyze_egg(egg_tmp, stubs))  # write zip-safety flag
+
+        for name in 'top_level', 'native_libs':
+            if locals()[name]:
+                txt = os.path.join(egg_tmp, 'EGG-INFO', name + '.txt')
+                if not os.path.exists(txt):
+                    f = open(txt, 'w')
+                    f.write('\n'.join(locals()[name]) + '\n')
+                    f.close()
+
+    def install_wheel(self, wheel_path, tmpdir):
+        wheel = Wheel(wheel_path)
+        assert wheel.is_compatible()
+        destination = os.path.join(self.install_dir, wheel.egg_name())
+        destination = os.path.abspath(destination)
+        if not self.dry_run:
+            ensure_directory(destination)
+        if os.path.isdir(destination) and not os.path.islink(destination):
+            dir_util.remove_tree(destination, dry_run=self.dry_run)
+        elif os.path.exists(destination):
+            self.execute(
+                os.unlink,
+                (destination,),
+                "Removing " + destination,
+            )
+        try:
+            self.execute(
+                wheel.install_as_egg,
+                (destination,),
+                ("Installing %s to %s") % (
+                    os.path.basename(wheel_path),
+                    os.path.dirname(destination)
+                ),
+            )
+        finally:
+            update_dist_caches(destination, fix_zipimporter_caches=False)
+        self.add_output(destination)
+        return self.egg_distribution(destination)
+
+    __mv_warning = textwrap.dedent("""
+        Because this distribution was installed --multi-version, before you can
+        import modules from this package in an application, you will need to
+        'import pkg_resources' and then use a 'require()' call similar to one of
+        these examples, in order to select the desired version:
+
+            pkg_resources.require("%(name)s")  # latest installed version
+            pkg_resources.require("%(name)s==%(version)s")  # this exact version
+            pkg_resources.require("%(name)s>=%(version)s")  # this version or higher
+        """).lstrip()
+
+    __id_warning = textwrap.dedent("""
+        Note also that the installation directory must be on sys.path at runtime for
+        this to work.  (e.g. by being the application's script directory, by being on
+        PYTHONPATH, or by being added to sys.path by your code.)
+        """)
+
+    def installation_report(self, req, dist, what="Installed"):
+        """Helpful installation message for display to package users"""
+        msg = "\n%(what)s %(eggloc)s%(extras)s"
+        if self.multi_version and not self.no_report:
+            msg += '\n' + self.__mv_warning
+            if self.install_dir not in map(normalize_path, sys.path):
+                msg += '\n' + self.__id_warning
+
+        eggloc = dist.location
+        name = dist.project_name
+        version = dist.version
+        extras = ''  # TODO: self.report_extras(req, dist)
+        return msg % locals()
+
+    __editable_msg = textwrap.dedent("""
+        Extracted editable version of %(spec)s to %(dirname)s
+
+        If it uses setuptools in its setup script, you can activate it in
+        "development" mode by going to that directory and running::
+
+            %(python)s setup.py develop
+
+        See the setuptools documentation for the "develop" command for more info.
+        """).lstrip()
+
+    def report_editable(self, spec, setup_script):
+        dirname = os.path.dirname(setup_script)
+        python = sys.executable
+        return '\n' + self.__editable_msg % locals()
+
+    def run_setup(self, setup_script, setup_base, args):
+        sys.modules.setdefault('distutils.command.bdist_egg', bdist_egg)
+        sys.modules.setdefault('distutils.command.egg_info', egg_info)
+
+        args = list(args)
+        if self.verbose > 2:
+            v = 'v' * (self.verbose - 1)
+            args.insert(0, '-' + v)
+        elif self.verbose < 2:
+            args.insert(0, '-q')
+        if self.dry_run:
+            args.insert(0, '-n')
+        log.info(
+            "Running %s %s", setup_script[len(setup_base) + 1:], ' '.join(args)
+        )
+        try:
+            run_setup(setup_script, args)
+        except SystemExit as v:
+            raise DistutilsError("Setup script exited with %s" % (v.args[0],))
+
+    def build_and_install(self, setup_script, setup_base):
+        args = ['bdist_egg', '--dist-dir']
+
+        dist_dir = tempfile.mkdtemp(
+            prefix='egg-dist-tmp-', dir=os.path.dirname(setup_script)
+        )
+        try:
+            self._set_fetcher_options(os.path.dirname(setup_script))
+            args.append(dist_dir)
+
+            self.run_setup(setup_script, setup_base, args)
+            all_eggs = Environment([dist_dir])
+            eggs = []
+            for key in all_eggs:
+                for dist in all_eggs[key]:
+                    eggs.append(self.install_egg(dist.location, setup_base))
+            if not eggs and not self.dry_run:
+                log.warn("No eggs found in %s (setup script problem?)",
+                         dist_dir)
+            return eggs
+        finally:
+            rmtree(dist_dir)
+            log.set_verbosity(self.verbose)  # restore our log verbosity
+
+    def _set_fetcher_options(self, base):
+        """
+        When easy_install is about to run bdist_egg on a source dist, that
+        source dist might have 'setup_requires' directives, requiring
+        additional fetching. Ensure the fetcher options given to easy_install
+        are available to that command as well.
+        """
+        # find the fetch options from easy_install and write them out
+        # to the setup.cfg file.
+        ei_opts = self.distribution.get_option_dict('easy_install').copy()
+        fetch_directives = (
+            'find_links', 'site_dirs', 'index_url', 'optimize', 'allow_hosts',
+        )
+        fetch_options = {}
+        for key, val in ei_opts.items():
+            if key not in fetch_directives:
+                continue
+            fetch_options[key.replace('_', '-')] = val[1]
+        # create a settings dictionary suitable for `edit_config`
+        settings = dict(easy_install=fetch_options)
+        cfg_filename = os.path.join(base, 'setup.cfg')
+        setopt.edit_config(cfg_filename, settings)
+
+    def update_pth(self, dist):
+        if self.pth_file is None:
+            return
+
+        for d in self.pth_file[dist.key]:  # drop old entries
+            if self.multi_version or d.location != dist.location:
+                log.info("Removing %s from easy-install.pth file", d)
+                self.pth_file.remove(d)
+                if d.location in self.shadow_path:
+                    self.shadow_path.remove(d.location)
+
+        if not self.multi_version:
+            if dist.location in self.pth_file.paths:
+                log.info(
+                    "%s is already the active version in easy-install.pth",
+                    dist,
+                )
+            else:
+                log.info("Adding %s to easy-install.pth file", dist)
+                self.pth_file.add(dist)  # add new entry
+                if dist.location not in self.shadow_path:
+                    self.shadow_path.append(dist.location)
+
+        if not self.dry_run:
+
+            self.pth_file.save()
+
+            if dist.key == 'setuptools':
+                # Ensure that setuptools itself never becomes unavailable!
+                # XXX should this check for latest version?
+                filename = os.path.join(self.install_dir, 'setuptools.pth')
+                if os.path.islink(filename):
+                    os.unlink(filename)
+                f = open(filename, 'wt')
+                f.write(self.pth_file.make_relative(dist.location) + '\n')
+                f.close()
+
+    def unpack_progress(self, src, dst):
+        # Progress filter for unpacking
+        log.debug("Unpacking %s to %s", src, dst)
+        return dst  # only unpack-and-compile skips files for dry run
+
+    def unpack_and_compile(self, egg_path, destination):
+        to_compile = []
+        to_chmod = []
+
+        def pf(src, dst):
+            if dst.endswith('.py') and not src.startswith('EGG-INFO/'):
+                to_compile.append(dst)
+            elif dst.endswith('.dll') or dst.endswith('.so'):
+                to_chmod.append(dst)
+            self.unpack_progress(src, dst)
+            return not self.dry_run and dst or None
+
+        unpack_archive(egg_path, destination, pf)
+        self.byte_compile(to_compile)
+        if not self.dry_run:
+            for f in to_chmod:
+                mode = ((os.stat(f)[stat.ST_MODE]) | 0o555) & 0o7755
+                chmod(f, mode)
+
+    def byte_compile(self, to_compile):
+        if sys.dont_write_bytecode:
+            return
+
+        from distutils.util import byte_compile
+
+        try:
+            # try to make the byte compile messages quieter
+            log.set_verbosity(self.verbose - 1)
+
+            byte_compile(to_compile, optimize=0, force=1, dry_run=self.dry_run)
+            if self.optimize:
+                byte_compile(
+                    to_compile, optimize=self.optimize, force=1,
+                    dry_run=self.dry_run,
+                )
+        finally:
+            log.set_verbosity(self.verbose)  # restore original verbosity
+
+    __no_default_msg = textwrap.dedent("""
+        bad install directory or PYTHONPATH
+
+        You are attempting to install a package to a directory that is not
+        on PYTHONPATH and which Python does not read ".pth" files from.  The
+        installation directory you specified (via --install-dir, --prefix, or
+        the distutils default setting) was:
+
+            %s
+
+        and your PYTHONPATH environment variable currently contains:
+
+            %r
+
+        Here are some of your options for correcting the problem:
+
+        * You can choose a different installation directory, i.e., one that is
+          on PYTHONPATH or supports .pth files
+
+        * You can add the installation directory to the PYTHONPATH environment
+          variable.  (It must then also be on PYTHONPATH whenever you run
+          Python and want to use the package(s) you are installing.)
+
+        * You can set up the installation directory to support ".pth" files by
+          using one of the approaches described here:
+
+          https://setuptools.readthedocs.io/en/latest/easy_install.html#custom-installation-locations
+
+
+        Please make the appropriate changes for your system and try again.""").lstrip()
+
+    def no_default_version_msg(self):
+        template = self.__no_default_msg
+        return template % (self.install_dir, os.environ.get('PYTHONPATH', ''))
+
+    def install_site_py(self):
+        """Make sure there's a site.py in the target dir, if needed"""
+
+        if self.sitepy_installed:
+            return  # already did it, or don't need to
+
+        sitepy = os.path.join(self.install_dir, "site.py")
+        source = resource_string("setuptools", "site-patch.py")
+        source = source.decode('utf-8')
+        current = ""
+
+        if os.path.exists(sitepy):
+            log.debug("Checking existing site.py in %s", self.install_dir)
+            with io.open(sitepy) as strm:
+                current = strm.read()
+
+            if not current.startswith('def __boot():'):
+                raise DistutilsError(
+                    "%s is not a setuptools-generated site.py; please"
+                    " remove it." % sitepy
+                )
+
+        if current != source:
+            log.info("Creating %s", sitepy)
+            if not self.dry_run:
+                ensure_directory(sitepy)
+                with io.open(sitepy, 'w', encoding='utf-8') as strm:
+                    strm.write(source)
+            self.byte_compile([sitepy])
+
+        self.sitepy_installed = True
+
+    def create_home_path(self):
+        """Create directories under ~."""
+        if not self.user:
+            return
+        home = convert_path(os.path.expanduser("~"))
+        for name, path in six.iteritems(self.config_vars):
+            if path.startswith(home) and not os.path.isdir(path):
+                self.debug_print("os.makedirs('%s', 0o700)" % path)
+                os.makedirs(path, 0o700)
+
+    INSTALL_SCHEMES = dict(
+        posix=dict(
+            install_dir='$base/lib/python$py_version_short/site-packages',
+            script_dir='$base/bin',
+        ),
+    )
+
+    DEFAULT_SCHEME = dict(
+        install_dir='$base/Lib/site-packages',
+        script_dir='$base/Scripts',
+    )
+
+    def _expand(self, *attrs):
+        config_vars = self.get_finalized_command('install').config_vars
+
+        if self.prefix:
+            # Set default install_dir/scripts from --prefix
+            config_vars = config_vars.copy()
+            config_vars['base'] = self.prefix
+            scheme = self.INSTALL_SCHEMES.get(os.name, self.DEFAULT_SCHEME)
+            for attr, val in scheme.items():
+                if getattr(self, attr, None) is None:
+                    setattr(self, attr, val)
+
+        from distutils.util import subst_vars
+
+        for attr in attrs:
+            val = getattr(self, attr)
+            if val is not None:
+                val = subst_vars(val, config_vars)
+                if os.name == 'posix':
+                    val = os.path.expanduser(val)
+                setattr(self, attr, val)
+
+
+def _pythonpath():
+    items = os.environ.get('PYTHONPATH', '').split(os.pathsep)
+    return filter(None, items)
+
+
+def get_site_dirs():
+    """
+    Return a list of 'site' dirs
+    """
+
+    sitedirs = []
+
+    # start with PYTHONPATH
+    sitedirs.extend(_pythonpath())
+
+    prefixes = [sys.prefix]
+    if sys.exec_prefix != sys.prefix:
+        prefixes.append(sys.exec_prefix)
+    for prefix in prefixes:
+        if prefix:
+            if sys.platform in ('os2emx', 'riscos'):
+                sitedirs.append(os.path.join(prefix, "Lib", "site-packages"))
+            elif os.sep == '/':
+                sitedirs.extend([
+                    os.path.join(
+                        prefix,
+                        "lib",
+                        "python{}.{}".format(*sys.version_info),
+                        "site-packages",
+                    ),
+                    os.path.join(prefix, "lib", "site-python"),
+                ])
+            else:
+                sitedirs.extend([
+                    prefix,
+                    os.path.join(prefix, "lib", "site-packages"),
+                ])
+            if sys.platform == 'darwin':
+                # for framework builds *only* we add the standard Apple
+                # locations. Currently only per-user, but /Library and
+                # /Network/Library could be added too
+                if 'Python.framework' in prefix:
+                    home = os.environ.get('HOME')
+                    if home:
+                        home_sp = os.path.join(
+                            home,
+                            'Library',
+                            'Python',
+                            '{}.{}'.format(*sys.version_info),
+                            'site-packages',
+                        )
+                        sitedirs.append(home_sp)
+    lib_paths = get_path('purelib'), get_path('platlib')
+    for site_lib in lib_paths:
+        if site_lib not in sitedirs:
+            sitedirs.append(site_lib)
+
+    if site.ENABLE_USER_SITE:
+        sitedirs.append(site.USER_SITE)
+
+    try:
+        sitedirs.extend(site.getsitepackages())
+    except AttributeError:
+        pass
+
+    sitedirs = list(map(normalize_path, sitedirs))
+
+    return sitedirs
+
+
+def expand_paths(inputs):
+    """Yield sys.path directories that might contain "old-style" packages"""
+
+    seen = {}
+
+    for dirname in inputs:
+        dirname = normalize_path(dirname)
+        if dirname in seen:
+            continue
+
+        seen[dirname] = 1
+        if not os.path.isdir(dirname):
+            continue
+
+        files = os.listdir(dirname)
+        yield dirname, files
+
+        for name in files:
+            if not name.endswith('.pth'):
+                # We only care about the .pth files
+                continue
+            if name in ('easy-install.pth', 'setuptools.pth'):
+                # Ignore .pth files that we control
+                continue
+
+            # Read the .pth file
+            f = open(os.path.join(dirname, name))
+            lines = list(yield_lines(f))
+            f.close()
+
+            # Yield existing non-dupe, non-import directory lines from it
+            for line in lines:
+                if not line.startswith("import"):
+                    line = normalize_path(line.rstrip())
+                    if line not in seen:
+                        seen[line] = 1
+                        if not os.path.isdir(line):
+                            continue
+                        yield line, os.listdir(line)
+
+
+def extract_wininst_cfg(dist_filename):
+    """Extract configuration data from a bdist_wininst .exe
+
+    Returns a configparser.RawConfigParser, or None
+    """
+    f = open(dist_filename, 'rb')
+    try:
+        endrec = zipfile._EndRecData(f)
+        if endrec is None:
+            return None
+
+        prepended = (endrec[9] - endrec[5]) - endrec[6]
+        if prepended < 12:  # no wininst data here
+            return None
+        f.seek(prepended - 12)
+
+        tag, cfglen, bmlen = struct.unpack("<iii", f.read(12))
+        if tag not in (0x1234567A, 0x1234567B):
+            return None  # not a valid tag
+
+        f.seek(prepended - (12 + cfglen))
+        init = {'version': '', 'target_version': ''}
+        cfg = configparser.RawConfigParser(init)
+        try:
+            part = f.read(cfglen)
+            # Read up to the first null byte.
+            config = part.split(b'\0', 1)[0]
+            # Now the config is in bytes, but for RawConfigParser, it should
+            #  be text, so decode it.
+            config = config.decode(sys.getfilesystemencoding())
+            cfg.readfp(six.StringIO(config))
+        except configparser.Error:
+            return None
+        if not cfg.has_section('metadata') or not cfg.has_section('Setup'):
+            return None
+        return cfg
+
+    finally:
+        f.close()
+
+
+def get_exe_prefixes(exe_filename):
+    """Get exe->egg path translations for a given .exe file"""
+
+    prefixes = [
+        ('PURELIB/', ''),
+        ('PLATLIB/pywin32_system32', ''),
+        ('PLATLIB/', ''),
+        ('SCRIPTS/', 'EGG-INFO/scripts/'),
+        ('DATA/lib/site-packages', ''),
+    ]
+    z = zipfile.ZipFile(exe_filename)
+    try:
+        for info in z.infolist():
+            name = info.filename
+            parts = name.split('/')
+            if len(parts) == 3 and parts[2] == 'PKG-INFO':
+                if parts[1].endswith('.egg-info'):
+                    prefixes.insert(0, ('/'.join(parts[:2]), 'EGG-INFO/'))
+                    break
+            if len(parts) != 2 or not name.endswith('.pth'):
+                continue
+            if name.endswith('-nspkg.pth'):
+                continue
+            if parts[0].upper() in ('PURELIB', 'PLATLIB'):
+                contents = z.read(name)
+                if six.PY3:
+                    contents = contents.decode()
+                for pth in yield_lines(contents):
+                    pth = pth.strip().replace('\\', '/')
+                    if not pth.startswith('import'):
+                        prefixes.append((('%s/%s/' % (parts[0], pth)), ''))
+    finally:
+        z.close()
+    prefixes = [(x.lower(), y) for x, y in prefixes]
+    prefixes.sort()
+    prefixes.reverse()
+    return prefixes
+
+
+class PthDistributions(Environment):
+    """A .pth file with Distribution paths in it"""
+
+    dirty = False
+
+    def __init__(self, filename, sitedirs=()):
+        self.filename = filename
+        self.sitedirs = list(map(normalize_path, sitedirs))
+        self.basedir = normalize_path(os.path.dirname(self.filename))
+        self._load()
+        Environment.__init__(self, [], None, None)
+        for path in yield_lines(self.paths):
+            list(map(self.add, find_distributions(path, True)))
+
+    def _load(self):
+        self.paths = []
+        saw_import = False
+        seen = dict.fromkeys(self.sitedirs)
+        if os.path.isfile(self.filename):
+            f = open(self.filename, 'rt')
+            for line in f:
+                if line.startswith('import'):
+                    saw_import = True
+                    continue
+                path = line.rstrip()
+                self.paths.append(path)
+                if not path.strip() or path.strip().startswith('#'):
+                    continue
+                # skip non-existent paths, in case somebody deleted a package
+                # manually, and duplicate paths as well
+                path = self.paths[-1] = normalize_path(
+                    os.path.join(self.basedir, path)
+                )
+                if not os.path.exists(path) or path in seen:
+                    self.paths.pop()  # skip it
+                    self.dirty = True  # we cleaned up, so we're dirty now :)
+                    continue
+                seen[path] = 1
+            f.close()
+
+        if self.paths and not saw_import:
+            self.dirty = True  # ensure anything we touch has import wrappers
+        while self.paths and not self.paths[-1].strip():
+            self.paths.pop()
+
+    def save(self):
+        """Write changed .pth file back to disk"""
+        if not self.dirty:
+            return
+
+        rel_paths = list(map(self.make_relative, self.paths))
+        if rel_paths:
+            log.debug("Saving %s", self.filename)
+            lines = self._wrap_lines(rel_paths)
+            data = '\n'.join(lines) + '\n'
+
+            if os.path.islink(self.filename):
+                os.unlink(self.filename)
+            with open(self.filename, 'wt') as f:
+                f.write(data)
+
+        elif os.path.exists(self.filename):
+            log.debug("Deleting empty %s", self.filename)
+            os.unlink(self.filename)
+
+        self.dirty = False
+
+    @staticmethod
+    def _wrap_lines(lines):
+        return lines
+
+    def add(self, dist):
+        """Add `dist` to the distribution map"""
+        new_path = (
+            dist.location not in self.paths and (
+                dist.location not in self.sitedirs or
+                # account for '.' being in PYTHONPATH
+                dist.location == os.getcwd()
+            )
+        )
+        if new_path:
+            self.paths.append(dist.location)
+            self.dirty = True
+        Environment.add(self, dist)
+
+    def remove(self, dist):
+        """Remove `dist` from the distribution map"""
+        while dist.location in self.paths:
+            self.paths.remove(dist.location)
+            self.dirty = True
+        Environment.remove(self, dist)
+
+    def make_relative(self, path):
+        npath, last = os.path.split(normalize_path(path))
+        baselen = len(self.basedir)
+        parts = [last]
+        sep = os.altsep == '/' and '/' or os.sep
+        while len(npath) >= baselen:
+            if npath == self.basedir:
+                parts.append(os.curdir)
+                parts.reverse()
+                return sep.join(parts)
+            npath, last = os.path.split(npath)
+            parts.append(last)
+        else:
+            return path
+
+
+class RewritePthDistributions(PthDistributions):
+    @classmethod
+    def _wrap_lines(cls, lines):
+        yield cls.prelude
+        for line in lines:
+            yield line
+        yield cls.postlude
+
+    prelude = _one_liner("""
+        import sys
+        sys.__plen = len(sys.path)
+        """)
+    postlude = _one_liner("""
+        import sys
+        new = sys.path[sys.__plen:]
+        del sys.path[sys.__plen:]
+        p = getattr(sys, '__egginsert', 0)
+        sys.path[p:p] = new
+        sys.__egginsert = p + len(new)
+        """)
+
+
+if os.environ.get('SETUPTOOLS_SYS_PATH_TECHNIQUE', 'raw') == 'rewrite':
+    PthDistributions = RewritePthDistributions
+
+
+def _first_line_re():
+    """
+    Return a regular expression based on first_line_re suitable for matching
+    strings.
+    """
+    if isinstance(first_line_re.pattern, str):
+        return first_line_re
+
+    # first_line_re in Python >=3.1.4 and >=3.2.1 is a bytes pattern.
+    return re.compile(first_line_re.pattern.decode())
+
+
+def auto_chmod(func, arg, exc):
+    if func in [os.unlink, os.remove] and os.name == 'nt':
+        chmod(arg, stat.S_IWRITE)
+        return func(arg)
+    et, ev, _ = sys.exc_info()
+    six.reraise(et, (ev[0], ev[1] + (" %s %s" % (func, arg))))
+
+
+def update_dist_caches(dist_path, fix_zipimporter_caches):
+    """
+    Fix any globally cached `dist_path` related data
+
+    `dist_path` should be a path of a newly installed egg distribution (zipped
+    or unzipped).
+
+    sys.path_importer_cache contains finder objects that have been cached when
+    importing data from the original distribution. Any such finders need to be
+    cleared since the replacement distribution might be packaged differently,
+    e.g. a zipped egg distribution might get replaced with an unzipped egg
+    folder or vice versa. Having the old finders cached may then cause Python
+    to attempt loading modules from the replacement distribution using an
+    incorrect loader.
+
+    zipimport.zipimporter objects are Python loaders charged with importing
+    data packaged inside zip archives. If stale loaders referencing the
+    original distribution, are left behind, they can fail to load modules from
+    the replacement distribution. E.g. if an old zipimport.zipimporter instance
+    is used to load data from a new zipped egg archive, it may cause the
+    operation to attempt to locate the requested data in the wrong location -
+    one indicated by the original distribution's zip archive directory
+    information. Such an operation may then fail outright, e.g. report having
+    read a 'bad local file header', or even worse, it may fail silently &
+    return invalid data.
+
+    zipimport._zip_directory_cache contains cached zip archive directory
+    information for all existing zipimport.zipimporter instances and all such
+    instances connected to the same archive share the same cached directory
+    information.
+
+    If asked, and the underlying Python implementation allows it, we can fix
+    all existing zipimport.zipimporter instances instead of having to track
+    them down and remove them one by one, by updating their shared cached zip
+    archive directory information. This, of course, assumes that the
+    replacement distribution is packaged as a zipped egg.
+
+    If not asked to fix existing zipimport.zipimporter instances, we still do
+    our best to clear any remaining zipimport.zipimporter related cached data
+    that might somehow later get used when attempting to load data from the new
+    distribution and thus cause such load operations to fail. Note that when
+    tracking down such remaining stale data, we can not catch every conceivable
+    usage from here, and we clear only those that we know of and have found to
+    cause problems if left alive. Any remaining caches should be updated by
+    whomever is in charge of maintaining them, i.e. they should be ready to
+    handle us replacing their zip archives with new distributions at runtime.
+
+    """
+    # There are several other known sources of stale zipimport.zipimporter
+    # instances that we do not clear here, but might if ever given a reason to
+    # do so:
+    # * Global setuptools pkg_resources.working_set (a.k.a. 'master working
+    # set') may contain distributions which may in turn contain their
+    #   zipimport.zipimporter loaders.
+    # * Several zipimport.zipimporter loaders held by local variables further
+    #   up the function call stack when running the setuptools installation.
+    # * Already loaded modules may have their __loader__ attribute set to the
+    #   exact loader instance used when importing them. Python 3.4 docs state
+    #   that this information is intended mostly for introspection and so is
+    #   not expected to cause us problems.
+    normalized_path = normalize_path(dist_path)
+    _uncache(normalized_path, sys.path_importer_cache)
+    if fix_zipimporter_caches:
+        _replace_zip_directory_cache_data(normalized_path)
+    else:
+        # Here, even though we do not want to fix existing and now stale
+        # zipimporter cache information, we still want to remove it. Related to
+        # Python's zip archive directory information cache, we clear each of
+        # its stale entries in two phases:
+        #   1. Clear the entry so attempting to access zip archive information
+        #      via any existing stale zipimport.zipimporter instances fails.
+        #   2. Remove the entry from the cache so any newly constructed
+        #      zipimport.zipimporter instances do not end up using old stale
+        #      zip archive directory information.
+        # This whole stale data removal step does not seem strictly necessary,
+        # but has been left in because it was done before we started replacing
+        # the zip archive directory information cache content if possible, and
+        # there are no relevant unit tests that we can depend on to tell us if
+        # this is really needed.
+        _remove_and_clear_zip_directory_cache_data(normalized_path)
+
+
+def _collect_zipimporter_cache_entries(normalized_path, cache):
+    """
+    Return zipimporter cache entry keys related to a given normalized path.
+
+    Alternative path spellings (e.g. those using different character case or
+    those using alternative path separators) related to the same path are
+    included. Any sub-path entries are included as well, i.e. those
+    corresponding to zip archives embedded in other zip archives.
+
+    """
+    result = []
+    prefix_len = len(normalized_path)
+    for p in cache:
+        np = normalize_path(p)
+        if (np.startswith(normalized_path) and
+                np[prefix_len:prefix_len + 1] in (os.sep, '')):
+            result.append(p)
+    return result
+
+
+def _update_zipimporter_cache(normalized_path, cache, updater=None):
+    """
+    Update zipimporter cache data for a given normalized path.
+
+    Any sub-path entries are processed as well, i.e. those corresponding to zip
+    archives embedded in other zip archives.
+
+    Given updater is a callable taking a cache entry key and the original entry
+    (after already removing the entry from the cache), and expected to update
+    the entry and possibly return a new one to be inserted in its place.
+    Returning None indicates that the entry should not be replaced with a new
+    one. If no updater is given, the cache entries are simply removed without
+    any additional processing, the same as if the updater simply returned None.
+
+    """
+    for p in _collect_zipimporter_cache_entries(normalized_path, cache):
+        # N.B. pypy's custom zipimport._zip_directory_cache implementation does
+        # not support the complete dict interface:
+        # * Does not support item assignment, thus not allowing this function
+        #    to be used only for removing existing cache entries.
+        #  * Does not support the dict.pop() method, forcing us to use the
+        #    get/del patterns instead. For more detailed information see the
+        #    following links:
+        #      https://github.com/pypa/setuptools/issues/202#issuecomment-202913420
+        #      http://bit.ly/2h9itJX
+        old_entry = cache[p]
+        del cache[p]
+        new_entry = updater and updater(p, old_entry)
+        if new_entry is not None:
+            cache[p] = new_entry
+
+
+def _uncache(normalized_path, cache):
+    _update_zipimporter_cache(normalized_path, cache)
+
+
+def _remove_and_clear_zip_directory_cache_data(normalized_path):
+    def clear_and_remove_cached_zip_archive_directory_data(path, old_entry):
+        old_entry.clear()
+
+    _update_zipimporter_cache(
+        normalized_path, zipimport._zip_directory_cache,
+        updater=clear_and_remove_cached_zip_archive_directory_data)
+
+
+# PyPy Python implementation does not allow directly writing to the
+# zipimport._zip_directory_cache and so prevents us from attempting to correct
+# its content. The best we can do there is clear the problematic cache content
+# and have PyPy repopulate it as needed. The downside is that if there are any
+# stale zipimport.zipimporter instances laying around, attempting to use them
+# will fail due to not having its zip archive directory information available
+# instead of being automatically corrected to use the new correct zip archive
+# directory information.
+if '__pypy__' in sys.builtin_module_names:
+    _replace_zip_directory_cache_data = \
+        _remove_and_clear_zip_directory_cache_data
+else:
+
+    def _replace_zip_directory_cache_data(normalized_path):
+        def replace_cached_zip_archive_directory_data(path, old_entry):
+            # N.B. In theory, we could load the zip directory information just
+            # once for all updated path spellings, and then copy it locally and
+            # update its contained path strings to contain the correct
+            # spelling, but that seems like a way too invasive move (this cache
+            # structure is not officially documented anywhere and could in
+            # theory change with new Python releases) for no significant
+            # benefit.
+            old_entry.clear()
+            zipimport.zipimporter(path)
+            old_entry.update(zipimport._zip_directory_cache[path])
+            return old_entry
+
+        _update_zipimporter_cache(
+            normalized_path, zipimport._zip_directory_cache,
+            updater=replace_cached_zip_archive_directory_data)
+
+
+def is_python(text, filename='<string>'):
+    "Is this string a valid Python script?"
+    try:
+        compile(text, filename, 'exec')
+    except (SyntaxError, TypeError):
+        return False
+    else:
+        return True
+
+
+def is_sh(executable):
+    """Determine if the specified executable is a .sh (contains a #! line)"""
+    try:
+        with io.open(executable, encoding='latin-1') as fp:
+            magic = fp.read(2)
+    except (OSError, IOError):
+        return executable
+    return magic == '#!'
+
+
+def nt_quote_arg(arg):
+    """Quote a command line argument according to Windows parsing rules"""
+    return subprocess.list2cmdline([arg])
+
+
+def is_python_script(script_text, filename):
+    """Is this text, as a whole, a Python script? (as opposed to shell/bat/etc.
+    """
+    if filename.endswith('.py') or filename.endswith('.pyw'):
+        return True  # extension says it's Python
+    if is_python(script_text, filename):
+        return True  # it's syntactically valid Python
+    if script_text.startswith('#!'):
+        # It begins with a '#!' line, so check if 'python' is in it somewhere
+        return 'python' in script_text.splitlines()[0].lower()
+
+    return False  # Not any Python I can recognize
+
+
+try:
+    from os import chmod as _chmod
+except ImportError:
+    # Jython compatibility
+    def _chmod(*args):
+        pass
+
+
+def chmod(path, mode):
+    log.debug("changing mode of %s to %o", path, mode)
+    try:
+        _chmod(path, mode)
+    except os.error as e:
+        log.debug("chmod failed: %s", e)
+
+
+class CommandSpec(list):
+    """
+    A command spec for a #! header, specified as a list of arguments akin to
+    those passed to Popen.
+    """
+
+    options = []
+    split_args = dict()
+
+    @classmethod
+    def best(cls):
+        """
+        Choose the best CommandSpec class based on environmental conditions.
+        """
+        return cls
+
+    @classmethod
+    def _sys_executable(cls):
+        _default = os.path.normpath(sys.executable)
+        return os.environ.get('__PYVENV_LAUNCHER__', _default)
+
+    @classmethod
+    def from_param(cls, param):
+        """
+        Construct a CommandSpec from a parameter to build_scripts, which may
+        be None.
+        """
+        if isinstance(param, cls):
+            return param
+        if isinstance(param, list):
+            return cls(param)
+        if param is None:
+            return cls.from_environment()
+        # otherwise, assume it's a string.
+        return cls.from_string(param)
+
+    @classmethod
+    def from_environment(cls):
+        return cls([cls._sys_executable()])
+
+    @classmethod
+    def from_string(cls, string):
+        """
+        Construct a command spec from a simple string representing a command
+        line parseable by shlex.split.
+        """
+        items = shlex.split(string, **cls.split_args)
+        return cls(items)
+
+    def install_options(self, script_text):
+        self.options = shlex.split(self._extract_options(script_text))
+        cmdline = subprocess.list2cmdline(self)
+        if not isascii(cmdline):
+            self.options[:0] = ['-x']
+
+    @staticmethod
+    def _extract_options(orig_script):
+        """
+        Extract any options from the first line of the script.
+        """
+        first = (orig_script + '\n').splitlines()[0]
+        match = _first_line_re().match(first)
+        options = match.group(1) or '' if match else ''
+        return options.strip()
+
+    def as_header(self):
+        return self._render(self + list(self.options))
+
+    @staticmethod
+    def _strip_quotes(item):
+        _QUOTES = '"\''
+        for q in _QUOTES:
+            if item.startswith(q) and item.endswith(q):
+                return item[1:-1]
+        return item
+
+    @staticmethod
+    def _render(items):
+        cmdline = subprocess.list2cmdline(
+            CommandSpec._strip_quotes(item.strip()) for item in items)
+        return '#!' + cmdline + '\n'
+
+
+# For pbr compat; will be removed in a future version.
+sys_executable = CommandSpec._sys_executable()
+
+
+class WindowsCommandSpec(CommandSpec):
+    split_args = dict(posix=False)
+
+
+class ScriptWriter:
+    """
+    Encapsulates behavior around writing entry point scripts for console and
+    gui apps.
+    """
+
+    template = textwrap.dedent(r"""
+        # EASY-INSTALL-ENTRY-SCRIPT: %(spec)r,%(group)r,%(name)r
+        __requires__ = %(spec)r
+        import re
+        import sys
+        from pkg_resources import load_entry_point
+
+        if __name__ == '__main__':
+            sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+            sys.exit(
+                load_entry_point(%(spec)r, %(group)r, %(name)r)()
+            )
+    """).lstrip()
+
+    command_spec_class = CommandSpec
+
+    @classmethod
+    def get_script_args(cls, dist, executable=None, wininst=False):
+        # for backward compatibility
+        warnings.warn("Use get_args", EasyInstallDeprecationWarning)
+        writer = (WindowsScriptWriter if wininst else ScriptWriter).best()
+        header = cls.get_script_header("", executable, wininst)
+        return writer.get_args(dist, header)
+
+    @classmethod
+    def get_script_header(cls, script_text, executable=None, wininst=False):
+        # for backward compatibility
+        warnings.warn("Use get_header", EasyInstallDeprecationWarning, stacklevel=2)
+        if wininst:
+            executable = "python.exe"
+        return cls.get_header(script_text, executable)
+
+    @classmethod
+    def get_args(cls, dist, header=None):
+        """
+        Yield write_script() argument tuples for a distribution's
+        console_scripts and gui_scripts entry points.
+        """
+        if header is None:
+            header = cls.get_header()
+        spec = str(dist.as_requirement())
+        for type_ in 'console', 'gui':
+            group = type_ + '_scripts'
+            for name, ep in dist.get_entry_map(group).items():
+                cls._ensure_safe_name(name)
+                script_text = cls.template % locals()
+                args = cls._get_script_args(type_, name, header, script_text)
+                for res in args:
+                    yield res
+
+    @staticmethod
+    def _ensure_safe_name(name):
+        """
+        Prevent paths in *_scripts entry point names.
+        """
+        has_path_sep = re.search(r'[\\/]', name)
+        if has_path_sep:
+            raise ValueError("Path separators not allowed in script names")
+
+    @classmethod
+    def get_writer(cls, force_windows):
+        # for backward compatibility
+        warnings.warn("Use best", EasyInstallDeprecationWarning)
+        return WindowsScriptWriter.best() if force_windows else cls.best()
+
+    @classmethod
+    def best(cls):
+        """
+        Select the best ScriptWriter for this environment.
+        """
+        if sys.platform == 'win32' or (os.name == 'java' and os._name == 'nt'):
+            return WindowsScriptWriter.best()
+        else:
+            return cls
+
+    @classmethod
+    def _get_script_args(cls, type_, name, header, script_text):
+        # Simply write the stub with no extension.
+        yield (name, header + script_text)
+
+    @classmethod
+    def get_header(cls, script_text="", executable=None):
+        """Create a #! line, getting options (if any) from script_text"""
+        cmd = cls.command_spec_class.best().from_param(executable)
+        cmd.install_options(script_text)
+        return cmd.as_header()
+
+
+class WindowsScriptWriter(ScriptWriter):
+    command_spec_class = WindowsCommandSpec
+
+    @classmethod
+    def get_writer(cls):
+        # for backward compatibility
+        warnings.warn("Use best", EasyInstallDeprecationWarning)
+        return cls.best()
+
+    @classmethod
+    def best(cls):
+        """
+        Select the best ScriptWriter suitable for Windows
+        """
+        writer_lookup = dict(
+            executable=WindowsExecutableLauncherWriter,
+            natural=cls,
+        )
+        # for compatibility, use the executable launcher by default
+        launcher = os.environ.get('SETUPTOOLS_LAUNCHER', 'executable')
+        return writer_lookup[launcher]
+
+    @classmethod
+    def _get_script_args(cls, type_, name, header, script_text):
+        "For Windows, add a .py extension"
+        ext = dict(console='.pya', gui='.pyw')[type_]
+        if ext not in os.environ['PATHEXT'].lower().split(';'):
+            msg = (
+                "{ext} not listed in PATHEXT; scripts will not be "
+                "recognized as executables."
+            ).format(**locals())
+            warnings.warn(msg, UserWarning)
+        old = ['.pya', '.py', '-script.py', '.pyc', '.pyo', '.pyw', '.exe']
+        old.remove(ext)
+        header = cls._adjust_header(type_, header)
+        blockers = [name + x for x in old]
+        yield name + ext, header + script_text, 't', blockers
+
+    @classmethod
+    def _adjust_header(cls, type_, orig_header):
+        """
+        Make sure 'pythonw' is used for gui and and 'python' is used for
+        console (regardless of what sys.executable is).
+        """
+        pattern = 'pythonw.exe'
+        repl = 'python.exe'
+        if type_ == 'gui':
+            pattern, repl = repl, pattern
+        pattern_ob = re.compile(re.escape(pattern), re.IGNORECASE)
+        new_header = pattern_ob.sub(string=orig_header, repl=repl)
+        return new_header if cls._use_header(new_header) else orig_header
+
+    @staticmethod
+    def _use_header(new_header):
+        """
+        Should _adjust_header use the replaced header?
+
+        On non-windows systems, always use. On
+        Windows systems, only use the replaced header if it resolves
+        to an executable on the system.
+        """
+        clean_header = new_header[2:-1].strip('"')
+        return sys.platform != 'win32' or find_executable(clean_header)
+
+
+class WindowsExecutableLauncherWriter(WindowsScriptWriter):
+    @classmethod
+    def _get_script_args(cls, type_, name, header, script_text):
+        """
+        For Windows, add a .py extension and an .exe launcher
+        """
+        if type_ == 'gui':
+            launcher_type = 'gui'
+            ext = '-script.pyw'
+            old = ['.pyw']
+        else:
+            launcher_type = 'cli'
+            ext = '-script.py'
+            old = ['.py', '.pyc', '.pyo']
+        hdr = cls._adjust_header(type_, header)
+        blockers = [name + x for x in old]
+        yield (name + ext, hdr + script_text, 't', blockers)
+        yield (
+            name + '.exe', get_win_launcher(launcher_type),
+            'b'  # write in binary mode
+        )
+        if not is_64bit():
+            # install a manifest for the launcher to prevent Windows
+            # from detecting it as an installer (which it will for
+            #  launchers like easy_install.exe). Consider only
+            #  adding a manifest for launchers detected as installers.
+            #  See Distribute #143 for details.
+            m_name = name + '.exe.manifest'
+            yield (m_name, load_launcher_manifest(name), 't')
+
+
+# for backward-compatibility
+get_script_args = ScriptWriter.get_script_args
+get_script_header = ScriptWriter.get_script_header
+
+
+def get_win_launcher(type):
+    """
+    Load the Windows launcher (executable) suitable for launching a script.
+
+    `type` should be either 'cli' or 'gui'
+
+    Returns the executable as a byte string.
+    """
+    launcher_fn = '%s.exe' % type
+    if is_64bit():
+        launcher_fn = launcher_fn.replace(".", "-64.")
+    else:
+        launcher_fn = launcher_fn.replace(".", "-32.")
+    return resource_string('setuptools', launcher_fn)
+
+
+def load_launcher_manifest(name):
+    manifest = pkg_resources.resource_string(__name__, 'launcher manifest.xml')
+    if six.PY2:
+        return manifest % vars()
+    else:
+        return manifest.decode('utf-8') % vars()
+
+
+def rmtree(path, ignore_errors=False, onerror=auto_chmod):
+    return shutil.rmtree(path, ignore_errors, onerror)
+
+
+def current_umask():
+    tmp = os.umask(0o022)
+    os.umask(tmp)
+    return tmp
+
+
+def bootstrap():
+    # This function is called when setuptools*.egg is run using /bin/sh
+    import setuptools
+
+    argv0 = os.path.dirname(setuptools.__path__[0])
+    sys.argv[0] = argv0
+    sys.argv.append(argv0)
+    main()
+
+
+def main(argv=None, **kw):
+    from setuptools import setup
+    from setuptools.dist import Distribution
+
+    class DistributionWithoutHelpCommands(Distribution):
+        common_usage = ""
+
+        def _show_help(self, *args, **kw):
+            with _patch_usage():
+                Distribution._show_help(self, *args, **kw)
+
+    if argv is None:
+        argv = sys.argv[1:]
+
+    with _patch_usage():
+        setup(
+            script_args=['-q', 'easy_install', '-v'] + argv,
+            script_name=sys.argv[0] or 'easy_install',
+            distclass=DistributionWithoutHelpCommands,
+            **kw
+        )
+
+
+@contextlib.contextmanager
+def _patch_usage():
+    import distutils.core
+    USAGE = textwrap.dedent("""
+        usage: %(script)s [options] requirement_or_url ...
+           or: %(script)s --help
+        """).lstrip()
+
+    def gen_usage(script_name):
+        return USAGE % dict(
+            script=os.path.basename(script_name),
+        )
+
+    saved = distutils.core.gen_usage
+    distutils.core.gen_usage = gen_usage
+    try:
+        yield
+    finally:
+        distutils.core.gen_usage = saved
+
+class EasyInstallDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in EasyInstall in SetupTools. Not ignored by default, unlike DeprecationWarning."""
+    
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/egg_info.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/egg_info.py
new file mode 100644
index 0000000..5d8f451
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/egg_info.py
@@ -0,0 +1,717 @@
+"""setuptools.command.egg_info
+
+Create a distribution's .egg-info directory and contents"""
+
+from distutils.filelist import FileList as _FileList
+from distutils.errors import DistutilsInternalError
+from distutils.util import convert_path
+from distutils import log
+import distutils.errors
+import distutils.filelist
+import os
+import re
+import sys
+import io
+import warnings
+import time
+import collections
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import map
+
+from setuptools import Command
+from setuptools.command.sdist import sdist
+from setuptools.command.sdist import walk_revctrl
+from setuptools.command.setopt import edit_config
+from setuptools.command import bdist_egg
+from pkg_resources import (
+    parse_requirements, safe_name, parse_version,
+    safe_version, yield_lines, EntryPoint, iter_entry_points, to_filename)
+import setuptools.unicode_utils as unicode_utils
+from setuptools.glob import glob
+
+from setuptools.extern import packaging
+from setuptools import SetuptoolsDeprecationWarning
+
+def translate_pattern(glob):
+    """
+    Translate a file path glob like '*.txt' in to a regular expression.
+    This differs from fnmatch.translate which allows wildcards to match
+    directory separators. It also knows about '**/' which matches any number of
+    directories.
+    """
+    pat = ''
+
+    # This will split on '/' within [character classes]. This is deliberate.
+    chunks = glob.split(os.path.sep)
+
+    sep = re.escape(os.sep)
+    valid_char = '[^%s]' % (sep,)
+
+    for c, chunk in enumerate(chunks):
+        last_chunk = c == len(chunks) - 1
+
+        # Chunks that are a literal ** are globstars. They match anything.
+        if chunk == '**':
+            if last_chunk:
+                # Match anything if this is the last component
+                pat += '.*'
+            else:
+                # Match '(name/)*'
+                pat += '(?:%s+%s)*' % (valid_char, sep)
+            continue  # Break here as the whole path component has been handled
+
+        # Find any special characters in the remainder
+        i = 0
+        chunk_len = len(chunk)
+        while i < chunk_len:
+            char = chunk[i]
+            if char == '*':
+                # Match any number of name characters
+                pat += valid_char + '*'
+            elif char == '?':
+                # Match a name character
+                pat += valid_char
+            elif char == '[':
+                # Character class
+                inner_i = i + 1
+                # Skip initial !/] chars
+                if inner_i < chunk_len and chunk[inner_i] == '!':
+                    inner_i = inner_i + 1
+                if inner_i < chunk_len and chunk[inner_i] == ']':
+                    inner_i = inner_i + 1
+
+                # Loop till the closing ] is found
+                while inner_i < chunk_len and chunk[inner_i] != ']':
+                    inner_i = inner_i + 1
+
+                if inner_i >= chunk_len:
+                    # Got to the end of the string without finding a closing ]
+                    # Do not treat this as a matching group, but as a literal [
+                    pat += re.escape(char)
+                else:
+                    # Grab the insides of the [brackets]
+                    inner = chunk[i + 1:inner_i]
+                    char_class = ''
+
+                    # Class negation
+                    if inner[0] == '!':
+                        char_class = '^'
+                        inner = inner[1:]
+
+                    char_class += re.escape(inner)
+                    pat += '[%s]' % (char_class,)
+
+                    # Skip to the end ]
+                    i = inner_i
+            else:
+                pat += re.escape(char)
+            i += 1
+
+        # Join each chunk with the dir separator
+        if not last_chunk:
+            pat += sep
+
+    pat += r'\Z'
+    return re.compile(pat, flags=re.MULTILINE|re.DOTALL)
+
+
+class InfoCommon:
+    tag_build = None
+    tag_date = None
+
+    @property
+    def name(self):
+        return safe_name(self.distribution.get_name())
+
+    def tagged_version(self):
+        version = self.distribution.get_version()
+        # egg_info may be called more than once for a distribution,
+        # in which case the version string already contains all tags.
+        if self.vtags and version.endswith(self.vtags):
+            return safe_version(version)
+        return safe_version(version + self.vtags)
+
+    def tags(self):
+        version = ''
+        if self.tag_build:
+            version += self.tag_build
+        if self.tag_date:
+            version += time.strftime("-%Y%m%d")
+        return version
+    vtags = property(tags)
+
+
+class egg_info(InfoCommon, Command):
+    description = "create a distribution's .egg-info directory"
+
+    user_options = [
+        ('egg-base=', 'e', "directory containing .egg-info directories"
+                           " (default: top of the source tree)"),
+        ('tag-date', 'd', "Add date stamp (e.g. 20050528) to version number"),
+        ('tag-build=', 'b', "Specify explicit tag to add to version number"),
+        ('no-date', 'D', "Don't include date stamp [default]"),
+    ]
+
+    boolean_options = ['tag-date']
+    negative_opt = {
+        'no-date': 'tag-date',
+    }
+
+    def initialize_options(self):
+        self.egg_base = None
+        self.egg_name = None
+        self.egg_info = None
+        self.egg_version = None
+        self.broken_egg_info = False
+
+    ####################################
+    # allow the 'tag_svn_revision' to be detected and
+    # set, supporting sdists built on older Setuptools.
+    @property
+    def tag_svn_revision(self):
+        pass
+
+    @tag_svn_revision.setter
+    def tag_svn_revision(self, value):
+        pass
+    ####################################
+
+    def save_version_info(self, filename):
+        """
+        Materialize the value of date into the
+        build tag. Install build keys in a deterministic order
+        to avoid arbitrary reordering on subsequent builds.
+        """
+        egg_info = collections.OrderedDict()
+        # follow the order these keys would have been added
+        # when PYTHONHASHSEED=0
+        egg_info['tag_build'] = self.tags()
+        egg_info['tag_date'] = 0
+        edit_config(filename, dict(egg_info=egg_info))
+
+    def finalize_options(self):
+        # Note: we need to capture the current value returned
+        # by `self.tagged_version()`, so we can later update
+        # `self.distribution.metadata.version` without
+        # repercussions.
+        self.egg_name = self.name
+        self.egg_version = self.tagged_version()
+        parsed_version = parse_version(self.egg_version)
+
+        try:
+            is_version = isinstance(parsed_version, packaging.version.Version)
+            spec = (
+                "%s==%s" if is_version else "%s===%s"
+            )
+            list(
+                parse_requirements(spec % (self.egg_name, self.egg_version))
+            )
+        except ValueError:
+            raise distutils.errors.DistutilsOptionError(
+                "Invalid distribution name or version syntax: %s-%s" %
+                (self.egg_name, self.egg_version)
+            )
+
+        if self.egg_base is None:
+            dirs = self.distribution.package_dir
+            self.egg_base = (dirs or {}).get('', os.curdir)
+
+        self.ensure_dirname('egg_base')
+        self.egg_info = to_filename(self.egg_name) + '.egg-info'
+        if self.egg_base != os.curdir:
+            self.egg_info = os.path.join(self.egg_base, self.egg_info)
+        if '-' in self.egg_name:
+            self.check_broken_egg_info()
+
+        # Set package version for the benefit of dumber commands
+        # (e.g. sdist, bdist_wininst, etc.)
+        #
+        self.distribution.metadata.version = self.egg_version
+
+        # If we bootstrapped around the lack of a PKG-INFO, as might be the
+        # case in a fresh checkout, make sure that any special tags get added
+        # to the version info
+        #
+        pd = self.distribution._patched_dist
+        if pd is not None and pd.key == self.egg_name.lower():
+            pd._version = self.egg_version
+            pd._parsed_version = parse_version(self.egg_version)
+            self.distribution._patched_dist = None
+
+    def write_or_delete_file(self, what, filename, data, force=False):
+        """Write `data` to `filename` or delete if empty
+
+        If `data` is non-empty, this routine is the same as ``write_file()``.
+        If `data` is empty but not ``None``, this is the same as calling
+        ``delete_file(filename)`.  If `data` is ``None``, then this is a no-op
+        unless `filename` exists, in which case a warning is issued about the
+        orphaned file (if `force` is false), or deleted (if `force` is true).
+        """
+        if data:
+            self.write_file(what, filename, data)
+        elif os.path.exists(filename):
+            if data is None and not force:
+                log.warn(
+                    "%s not set in setup(), but %s exists", what, filename
+                )
+                return
+            else:
+                self.delete_file(filename)
+
+    def write_file(self, what, filename, data):
+        """Write `data` to `filename` (if not a dry run) after announcing it
+
+        `what` is used in a log message to identify what is being written
+        to the file.
+        """
+        log.info("writing %s to %s", what, filename)
+        if six.PY3:
+            data = data.encode("utf-8")
+        if not self.dry_run:
+            f = open(filename, 'wb')
+            f.write(data)
+            f.close()
+
+    def delete_file(self, filename):
+        """Delete `filename` (if not a dry run) after announcing it"""
+        log.info("deleting %s", filename)
+        if not self.dry_run:
+            os.unlink(filename)
+
+    def run(self):
+        self.mkpath(self.egg_info)
+        os.utime(self.egg_info, None)
+        installer = self.distribution.fetch_build_egg
+        for ep in iter_entry_points('egg_info.writers'):
+            ep.require(installer=installer)
+            writer = ep.resolve()
+            writer(self, ep.name, os.path.join(self.egg_info, ep.name))
+
+        # Get rid of native_libs.txt if it was put there by older bdist_egg
+        nl = os.path.join(self.egg_info, "native_libs.txt")
+        if os.path.exists(nl):
+            self.delete_file(nl)
+
+        self.find_sources()
+
+    def find_sources(self):
+        """Generate SOURCES.txt manifest file"""
+        manifest_filename = os.path.join(self.egg_info, "SOURCES.txt")
+        mm = manifest_maker(self.distribution)
+        mm.manifest = manifest_filename
+        mm.run()
+        self.filelist = mm.filelist
+
+    def check_broken_egg_info(self):
+        bei = self.egg_name + '.egg-info'
+        if self.egg_base != os.curdir:
+            bei = os.path.join(self.egg_base, bei)
+        if os.path.exists(bei):
+            log.warn(
+                "-" * 78 + '\n'
+                "Note: Your current .egg-info directory has a '-' in its name;"
+                '\nthis will not work correctly with "setup.py develop".\n\n'
+                'Please rename %s to %s to correct this problem.\n' + '-' * 78,
+                bei, self.egg_info
+            )
+            self.broken_egg_info = self.egg_info
+            self.egg_info = bei  # make it work for now
+
+
+class FileList(_FileList):
+    # Implementations of the various MANIFEST.in commands
+
+    def process_template_line(self, line):
+        # Parse the line: split it up, make sure the right number of words
+        # is there, and return the relevant words.  'action' is always
+        # defined: it's the first word of the line.  Which of the other
+        # three are defined depends on the action; it'll be either
+        # patterns, (dir and patterns), or (dir_pattern).
+        (action, patterns, dir, dir_pattern) = self._parse_template_line(line)
+
+        # OK, now we know that the action is valid and we have the
+        # right number of words on the line for that action -- so we
+        # can proceed with minimal error-checking.
+        if action == 'include':
+            self.debug_print("include " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.include(pattern):
+                    log.warn("warning: no files found matching '%s'", pattern)
+
+        elif action == 'exclude':
+            self.debug_print("exclude " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.exclude(pattern):
+                    log.warn(("warning: no previously-included files "
+                              "found matching '%s'"), pattern)
+
+        elif action == 'global-include':
+            self.debug_print("global-include " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.global_include(pattern):
+                    log.warn(("warning: no files found matching '%s' "
+                              "anywhere in distribution"), pattern)
+
+        elif action == 'global-exclude':
+            self.debug_print("global-exclude " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.global_exclude(pattern):
+                    log.warn(("warning: no previously-included files matching "
+                              "'%s' found anywhere in distribution"),
+                             pattern)
+
+        elif action == 'recursive-include':
+            self.debug_print("recursive-include %s %s" %
+                             (dir, ' '.join(patterns)))
+            for pattern in patterns:
+                if not self.recursive_include(dir, pattern):
+                    log.warn(("warning: no files found matching '%s' "
+                              "under directory '%s'"),
+                             pattern, dir)
+
+        elif action == 'recursive-exclude':
+            self.debug_print("recursive-exclude %s %s" %
+                             (dir, ' '.join(patterns)))
+            for pattern in patterns:
+                if not self.recursive_exclude(dir, pattern):
+                    log.warn(("warning: no previously-included files matching "
+                              "'%s' found under directory '%s'"),
+                             pattern, dir)
+
+        elif action == 'graft':
+            self.debug_print("graft " + dir_pattern)
+            if not self.graft(dir_pattern):
+                log.warn("warning: no directories found matching '%s'",
+                         dir_pattern)
+
+        elif action == 'prune':
+            self.debug_print("prune " + dir_pattern)
+            if not self.prune(dir_pattern):
+                log.warn(("no previously-included directories found "
+                          "matching '%s'"), dir_pattern)
+
+        else:
+            raise DistutilsInternalError(
+                "this cannot happen: invalid action '%s'" % action)
+
+    def _remove_files(self, predicate):
+        """
+        Remove all files from the file list that match the predicate.
+        Return True if any matching files were removed
+        """
+        found = False
+        for i in range(len(self.files) - 1, -1, -1):
+            if predicate(self.files[i]):
+                self.debug_print(" removing " + self.files[i])
+                del self.files[i]
+                found = True
+        return found
+
+    def include(self, pattern):
+        """Include files that match 'pattern'."""
+        found = [f for f in glob(pattern) if not os.path.isdir(f)]
+        self.extend(found)
+        return bool(found)
+
+    def exclude(self, pattern):
+        """Exclude files that match 'pattern'."""
+        match = translate_pattern(pattern)
+        return self._remove_files(match.match)
+
+    def recursive_include(self, dir, pattern):
+        """
+        Include all files anywhere in 'dir/' that match the pattern.
+        """
+        full_pattern = os.path.join(dir, '**', pattern)
+        found = [f for f in glob(full_pattern, recursive=True)
+                 if not os.path.isdir(f)]
+        self.extend(found)
+        return bool(found)
+
+    def recursive_exclude(self, dir, pattern):
+        """
+        Exclude any file anywhere in 'dir/' that match the pattern.
+        """
+        match = translate_pattern(os.path.join(dir, '**', pattern))
+        return self._remove_files(match.match)
+
+    def graft(self, dir):
+        """Include all files from 'dir/'."""
+        found = [
+            item
+            for match_dir in glob(dir)
+            for item in distutils.filelist.findall(match_dir)
+        ]
+        self.extend(found)
+        return bool(found)
+
+    def prune(self, dir):
+        """Filter out files from 'dir/'."""
+        match = translate_pattern(os.path.join(dir, '**'))
+        return self._remove_files(match.match)
+
+    def global_include(self, pattern):
+        """
+        Include all files anywhere in the current directory that match the
+        pattern. This is very inefficient on large file trees.
+        """
+        if self.allfiles is None:
+            self.findall()
+        match = translate_pattern(os.path.join('**', pattern))
+        found = [f for f in self.allfiles if match.match(f)]
+        self.extend(found)
+        return bool(found)
+
+    def global_exclude(self, pattern):
+        """
+        Exclude all files anywhere that match the pattern.
+        """
+        match = translate_pattern(os.path.join('**', pattern))
+        return self._remove_files(match.match)
+
+    def append(self, item):
+        if item.endswith('\r'):  # Fix older sdists built on Windows
+            item = item[:-1]
+        path = convert_path(item)
+
+        if self._safe_path(path):
+            self.files.append(path)
+
+    def extend(self, paths):
+        self.files.extend(filter(self._safe_path, paths))
+
+    def _repair(self):
+        """
+        Replace self.files with only safe paths
+
+        Because some owners of FileList manipulate the underlying
+        ``files`` attribute directly, this method must be called to
+        repair those paths.
+        """
+        self.files = list(filter(self._safe_path, self.files))
+
+    def _safe_path(self, path):
+        enc_warn = "'%s' not %s encodable -- skipping"
+
+        # To avoid accidental trans-codings errors, first to unicode
+        u_path = unicode_utils.filesys_decode(path)
+        if u_path is None:
+            log.warn("'%s' in unexpected encoding -- skipping" % path)
+            return False
+
+        # Must ensure utf-8 encodability
+        utf8_path = unicode_utils.try_encode(u_path, "utf-8")
+        if utf8_path is None:
+            log.warn(enc_warn, path, 'utf-8')
+            return False
+
+        try:
+            # accept is either way checks out
+            if os.path.exists(u_path) or os.path.exists(utf8_path):
+                return True
+        # this will catch any encode errors decoding u_path
+        except UnicodeEncodeError:
+            log.warn(enc_warn, path, sys.getfilesystemencoding())
+
+
+class manifest_maker(sdist):
+    template = "MANIFEST.in"
+
+    def initialize_options(self):
+        self.use_defaults = 1
+        self.prune = 1
+        self.manifest_only = 1
+        self.force_manifest = 1
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        self.filelist = FileList()
+        if not os.path.exists(self.manifest):
+            self.write_manifest()  # it must exist so it'll get in the list
+        self.add_defaults()
+        if os.path.exists(self.template):
+            self.read_template()
+        self.prune_file_list()
+        self.filelist.sort()
+        self.filelist.remove_duplicates()
+        self.write_manifest()
+
+    def _manifest_normalize(self, path):
+        path = unicode_utils.filesys_decode(path)
+        return path.replace(os.sep, '/')
+
+    def write_manifest(self):
+        """
+        Write the file list in 'self.filelist' to the manifest file
+        named by 'self.manifest'.
+        """
+        self.filelist._repair()
+
+        # Now _repairs should encodability, but not unicode
+        files = [self._manifest_normalize(f) for f in self.filelist.files]
+        msg = "writing manifest file '%s'" % self.manifest
+        self.execute(write_file, (self.manifest, files), msg)
+
+    def warn(self, msg):
+        if not self._should_suppress_warning(msg):
+            sdist.warn(self, msg)
+
+    @staticmethod
+    def _should_suppress_warning(msg):
+        """
+        suppress missing-file warnings from sdist
+        """
+        return re.match(r"standard file .*not found", msg)
+
+    def add_defaults(self):
+        sdist.add_defaults(self)
+        self.check_license()
+        self.filelist.append(self.template)
+        self.filelist.append(self.manifest)
+        rcfiles = list(walk_revctrl())
+        if rcfiles:
+            self.filelist.extend(rcfiles)
+        elif os.path.exists(self.manifest):
+            self.read_manifest()
+
+        if os.path.exists("setup.py"):
+            # setup.py should be included by default, even if it's not
+            # the script called to create the sdist
+            self.filelist.append("setup.py")
+
+        ei_cmd = self.get_finalized_command('egg_info')
+        self.filelist.graft(ei_cmd.egg_info)
+
+    def prune_file_list(self):
+        build = self.get_finalized_command('build')
+        base_dir = self.distribution.get_fullname()
+        self.filelist.prune(build.build_base)
+        self.filelist.prune(base_dir)
+        sep = re.escape(os.sep)
+        self.filelist.exclude_pattern(r'(^|' + sep + r')(RCS|CVS|\.svn)' + sep,
+                                      is_regex=1)
+
+
+def write_file(filename, contents):
+    """Create a file with the specified name and write 'contents' (a
+    sequence of strings without line terminators) to it.
+    """
+    contents = "\n".join(contents)
+
+    # assuming the contents has been vetted for utf-8 encoding
+    contents = contents.encode("utf-8")
+
+    with open(filename, "wb") as f:  # always write POSIX-style manifest
+        f.write(contents)
+
+
+def write_pkg_info(cmd, basename, filename):
+    log.info("writing %s", filename)
+    if not cmd.dry_run:
+        metadata = cmd.distribution.metadata
+        metadata.version, oldver = cmd.egg_version, metadata.version
+        metadata.name, oldname = cmd.egg_name, metadata.name
+
+        try:
+            # write unescaped data to PKG-INFO, so older pkg_resources
+            # can still parse it
+            metadata.write_pkg_info(cmd.egg_info)
+        finally:
+            metadata.name, metadata.version = oldname, oldver
+
+        safe = getattr(cmd.distribution, 'zip_safe', None)
+
+        bdist_egg.write_safety_flag(cmd.egg_info, safe)
+
+
+def warn_depends_obsolete(cmd, basename, filename):
+    if os.path.exists(filename):
+        log.warn(
+            "WARNING: 'depends.txt' is not used by setuptools 0.6!\n"
+            "Use the install_requires/extras_require setup() args instead."
+        )
+
+
+def _write_requirements(stream, reqs):
+    lines = yield_lines(reqs or ())
+    append_cr = lambda line: line + '\n'
+    lines = map(append_cr, lines)
+    stream.writelines(lines)
+
+
+def write_requirements(cmd, basename, filename):
+    dist = cmd.distribution
+    data = six.StringIO()
+    _write_requirements(data, dist.install_requires)
+    extras_require = dist.extras_require or {}
+    for extra in sorted(extras_require):
+        data.write('\n[{extra}]\n'.format(**vars()))
+        _write_requirements(data, extras_require[extra])
+    cmd.write_or_delete_file("requirements", filename, data.getvalue())
+
+
+def write_setup_requirements(cmd, basename, filename):
+    data = io.StringIO()
+    _write_requirements(data, cmd.distribution.setup_requires)
+    cmd.write_or_delete_file("setup-requirements", filename, data.getvalue())
+
+
+def write_toplevel_names(cmd, basename, filename):
+    pkgs = dict.fromkeys(
+        [
+            k.split('.', 1)[0]
+            for k in cmd.distribution.iter_distribution_names()
+        ]
+    )
+    cmd.write_file("top-level names", filename, '\n'.join(sorted(pkgs)) + '\n')
+
+
+def overwrite_arg(cmd, basename, filename):
+    write_arg(cmd, basename, filename, True)
+
+
+def write_arg(cmd, basename, filename, force=False):
+    argname = os.path.splitext(basename)[0]
+    value = getattr(cmd.distribution, argname, None)
+    if value is not None:
+        value = '\n'.join(value) + '\n'
+    cmd.write_or_delete_file(argname, filename, value, force)
+
+
+def write_entries(cmd, basename, filename):
+    ep = cmd.distribution.entry_points
+
+    if isinstance(ep, six.string_types) or ep is None:
+        data = ep
+    elif ep is not None:
+        data = []
+        for section, contents in sorted(ep.items()):
+            if not isinstance(contents, six.string_types):
+                contents = EntryPoint.parse_group(section, contents)
+                contents = '\n'.join(sorted(map(str, contents.values())))
+            data.append('[%s]\n%s\n\n' % (section, contents))
+        data = ''.join(data)
+
+    cmd.write_or_delete_file('entry points', filename, data, True)
+
+
+def get_pkg_info_revision():
+    """
+    Get a -r### off of PKG-INFO Version in case this is an sdist of
+    a subversion revision.
+    """
+    warnings.warn("get_pkg_info_revision is deprecated.", EggInfoDeprecationWarning)
+    if os.path.exists('PKG-INFO'):
+        with io.open('PKG-INFO') as f:
+            for line in f:
+                match = re.match(r"Version:.*-r(\d+)\s*$", line)
+                if match:
+                    return int(match.group(1))
+    return 0
+
+
+class EggInfoDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in eggInfo in setupTools. Not ignored by default, unlike DeprecationWarning."""
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install.py
new file mode 100644
index 0000000..31a5ddb
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install.py
@@ -0,0 +1,125 @@
+from distutils.errors import DistutilsArgError
+import inspect
+import glob
+import warnings
+import platform
+import distutils.command.install as orig
+
+import setuptools
+
+# Prior to numpy 1.9, NumPy relies on the '_install' name, so provide it for
+# now. See https://github.com/pypa/setuptools/issues/199/
+_install = orig.install
+
+
+class install(orig.install):
+    """Use easy_install to install the package, w/dependencies"""
+
+    user_options = orig.install.user_options + [
+        ('old-and-unmanageable', None, "Try not to use this!"),
+        ('single-version-externally-managed', None,
+         "used by system package builders to create 'flat' eggs"),
+    ]
+    boolean_options = orig.install.boolean_options + [
+        'old-and-unmanageable', 'single-version-externally-managed',
+    ]
+    new_commands = [
+        ('install_egg_info', lambda self: True),
+        ('install_scripts', lambda self: True),
+    ]
+    _nc = dict(new_commands)
+
+    def initialize_options(self):
+        orig.install.initialize_options(self)
+        self.old_and_unmanageable = None
+        self.single_version_externally_managed = None
+
+    def finalize_options(self):
+        orig.install.finalize_options(self)
+        if self.root:
+            self.single_version_externally_managed = True
+        elif self.single_version_externally_managed:
+            if not self.root and not self.record:
+                raise DistutilsArgError(
+                    "You must specify --record or --root when building system"
+                    " packages"
+                )
+
+    def handle_extra_path(self):
+        if self.root or self.single_version_externally_managed:
+            # explicit backward-compatibility mode, allow extra_path to work
+            return orig.install.handle_extra_path(self)
+
+        # Ignore extra_path when installing an egg (or being run by another
+        # command without --root or --single-version-externally-managed
+        self.path_file = None
+        self.extra_dirs = ''
+
+    def run(self):
+        # Explicit request for old-style install?  Just do it
+        if self.old_and_unmanageable or self.single_version_externally_managed:
+            return orig.install.run(self)
+
+        if not self._called_from_setup(inspect.currentframe()):
+            # Run in backward-compatibility mode to support bdist_* commands.
+            orig.install.run(self)
+        else:
+            self.do_egg_install()
+
+    @staticmethod
+    def _called_from_setup(run_frame):
+        """
+        Attempt to detect whether run() was called from setup() or by another
+        command.  If called by setup(), the parent caller will be the
+        'run_command' method in 'distutils.dist', and *its* caller will be
+        the 'run_commands' method.  If called any other way, the
+        immediate caller *might* be 'run_command', but it won't have been
+        called by 'run_commands'. Return True in that case or if a call stack
+        is unavailable. Return False otherwise.
+        """
+        if run_frame is None:
+            msg = "Call stack not available. bdist_* commands may fail."
+            warnings.warn(msg)
+            if platform.python_implementation() == 'IronPython':
+                msg = "For best results, pass -X:Frames to enable call stack."
+                warnings.warn(msg)
+            return True
+        res = inspect.getouterframes(run_frame)[2]
+        caller, = res[:1]
+        info = inspect.getframeinfo(caller)
+        caller_module = caller.f_globals.get('__name__', '')
+        return (
+            caller_module == 'distutils.dist'
+            and info.function == 'run_commands'
+        )
+
+    def do_egg_install(self):
+
+        easy_install = self.distribution.get_command_class('easy_install')
+
+        cmd = easy_install(
+            self.distribution, args="x", root=self.root, record=self.record,
+        )
+        cmd.ensure_finalized()  # finalize before bdist_egg munges install cmd
+        cmd.always_copy_from = '.'  # make sure local-dir eggs get installed
+
+        # pick up setup-dir .egg files only: no .egg-info
+        cmd.package_index.scan(glob.glob('*.egg'))
+
+        self.run_command('bdist_egg')
+        args = [self.distribution.get_command_obj('bdist_egg').egg_output]
+
+        if setuptools.bootstrap_install_from:
+            # Bootstrap self-installation of setuptools
+            args.insert(0, setuptools.bootstrap_install_from)
+
+        cmd.args = args
+        cmd.run()
+        setuptools.bootstrap_install_from = None
+
+
+# XXX Python 3.1 doesn't see _nc if this is inside the class
+install.sub_commands = (
+    [cmd for cmd in orig.install.sub_commands if cmd[0] not in install._nc] +
+    install.new_commands
+)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install_egg_info.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install_egg_info.py
new file mode 100644
index 0000000..edc4718
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install_egg_info.py
@@ -0,0 +1,62 @@
+from distutils import log, dir_util
+import os
+
+from setuptools import Command
+from setuptools import namespaces
+from setuptools.archive_util import unpack_archive
+import pkg_resources
+
+
+class install_egg_info(namespaces.Installer, Command):
+    """Install an .egg-info directory for the package"""
+
+    description = "Install an .egg-info directory for the package"
+
+    user_options = [
+        ('install-dir=', 'd', "directory to install to"),
+    ]
+
+    def initialize_options(self):
+        self.install_dir = None
+
+    def finalize_options(self):
+        self.set_undefined_options('install_lib',
+                                   ('install_dir', 'install_dir'))
+        ei_cmd = self.get_finalized_command("egg_info")
+        basename = pkg_resources.Distribution(
+            None, None, ei_cmd.egg_name, ei_cmd.egg_version
+        ).egg_name() + '.egg-info'
+        self.source = ei_cmd.egg_info
+        self.target = os.path.join(self.install_dir, basename)
+        self.outputs = []
+
+    def run(self):
+        self.run_command('egg_info')
+        if os.path.isdir(self.target) and not os.path.islink(self.target):
+            dir_util.remove_tree(self.target, dry_run=self.dry_run)
+        elif os.path.exists(self.target):
+            self.execute(os.unlink, (self.target,), "Removing " + self.target)
+        if not self.dry_run:
+            pkg_resources.ensure_directory(self.target)
+        self.execute(
+            self.copytree, (), "Copying %s to %s" % (self.source, self.target)
+        )
+        self.install_namespaces()
+
+    def get_outputs(self):
+        return self.outputs
+
+    def copytree(self):
+        # Copy the .egg-info tree to site-packages
+        def skimmer(src, dst):
+            # filter out source-control directories; note that 'src' is always
+            # a '/'-separated path, regardless of platform.  'dst' is a
+            # platform-specific path.
+            for skip in '.svn/', 'CVS/':
+                if src.startswith(skip) or '/' + skip in src:
+                    return None
+            self.outputs.append(dst)
+            log.debug("Copying %s to %s", src, dst)
+            return dst
+
+        unpack_archive(self.source, self.target, skimmer)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install_lib.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install_lib.py
new file mode 100644
index 0000000..07d6593
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install_lib.py
@@ -0,0 +1,121 @@
+import os
+import sys
+from itertools import product, starmap
+import distutils.command.install_lib as orig
+
+
+class install_lib(orig.install_lib):
+    """Don't add compiled flags to filenames of non-Python files"""
+
+    def run(self):
+        self.build()
+        outfiles = self.install()
+        if outfiles is not None:
+            # always compile, in case we have any extension stubs to deal with
+            self.byte_compile(outfiles)
+
+    def get_exclusions(self):
+        """
+        Return a collections.Sized collections.Container of paths to be
+        excluded for single_version_externally_managed installations.
+        """
+        all_packages = (
+            pkg
+            for ns_pkg in self._get_SVEM_NSPs()
+            for pkg in self._all_packages(ns_pkg)
+        )
+
+        excl_specs = product(all_packages, self._gen_exclusion_paths())
+        return set(starmap(self._exclude_pkg_path, excl_specs))
+
+    def _exclude_pkg_path(self, pkg, exclusion_path):
+        """
+        Given a package name and exclusion path within that package,
+        compute the full exclusion path.
+        """
+        parts = pkg.split('.') + [exclusion_path]
+        return os.path.join(self.install_dir, *parts)
+
+    @staticmethod
+    def _all_packages(pkg_name):
+        """
+        >>> list(install_lib._all_packages('foo.bar.baz'))
+        ['foo.bar.baz', 'foo.bar', 'foo']
+        """
+        while pkg_name:
+            yield pkg_name
+            pkg_name, sep, child = pkg_name.rpartition('.')
+
+    def _get_SVEM_NSPs(self):
+        """
+        Get namespace packages (list) but only for
+        single_version_externally_managed installations and empty otherwise.
+        """
+        # TODO: is it necessary to short-circuit here? i.e. what's the cost
+        # if get_finalized_command is called even when namespace_packages is
+        # False?
+        if not self.distribution.namespace_packages:
+            return []
+
+        install_cmd = self.get_finalized_command('install')
+        svem = install_cmd.single_version_externally_managed
+
+        return self.distribution.namespace_packages if svem else []
+
+    @staticmethod
+    def _gen_exclusion_paths():
+        """
+        Generate file paths to be excluded for namespace packages (bytecode
+        cache files).
+        """
+        # always exclude the package module itself
+        yield '__init__.py'
+
+        yield '__init__.pyc'
+        yield '__init__.pyo'
+
+        if not hasattr(sys, 'implementation'):
+            return
+
+        base = os.path.join('__pycache__', '__init__.' + sys.implementation.cache_tag)
+        yield base + '.pyc'
+        yield base + '.pyo'
+        yield base + '.opt-1.pyc'
+        yield base + '.opt-2.pyc'
+
+    def copy_tree(
+            self, infile, outfile,
+            preserve_mode=1, preserve_times=1, preserve_symlinks=0, level=1
+    ):
+        assert preserve_mode and preserve_times and not preserve_symlinks
+        exclude = self.get_exclusions()
+
+        if not exclude:
+            return orig.install_lib.copy_tree(self, infile, outfile)
+
+        # Exclude namespace package __init__.py* files from the output
+
+        from setuptools.archive_util import unpack_directory
+        from distutils import log
+
+        outfiles = []
+
+        def pf(src, dst):
+            if dst in exclude:
+                log.warn("Skipping installation of %s (namespace package)",
+                         dst)
+                return False
+
+            log.info("copying %s -> %s", src, os.path.dirname(dst))
+            outfiles.append(dst)
+            return dst
+
+        unpack_directory(infile, outfile, pf)
+        return outfiles
+
+    def get_outputs(self):
+        outputs = orig.install_lib.get_outputs(self)
+        exclude = self.get_exclusions()
+        if exclude:
+            return [f for f in outputs if f not in exclude]
+        return outputs
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install_scripts.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install_scripts.py
new file mode 100644
index 0000000..1623427
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/install_scripts.py
@@ -0,0 +1,65 @@
+from distutils import log
+import distutils.command.install_scripts as orig
+import os
+import sys
+
+from pkg_resources import Distribution, PathMetadata, ensure_directory
+
+
+class install_scripts(orig.install_scripts):
+    """Do normal script install, plus any egg_info wrapper scripts"""
+
+    def initialize_options(self):
+        orig.install_scripts.initialize_options(self)
+        self.no_ep = False
+
+    def run(self):
+        import setuptools.command.easy_install as ei
+
+        self.run_command("egg_info")
+        if self.distribution.scripts:
+            orig.install_scripts.run(self)  # run first to set up self.outfiles
+        else:
+            self.outfiles = []
+        if self.no_ep:
+            # don't install entry point scripts into .egg file!
+            return
+
+        ei_cmd = self.get_finalized_command("egg_info")
+        dist = Distribution(
+            ei_cmd.egg_base, PathMetadata(ei_cmd.egg_base, ei_cmd.egg_info),
+            ei_cmd.egg_name, ei_cmd.egg_version,
+        )
+        bs_cmd = self.get_finalized_command('build_scripts')
+        exec_param = getattr(bs_cmd, 'executable', None)
+        bw_cmd = self.get_finalized_command("bdist_wininst")
+        is_wininst = getattr(bw_cmd, '_is_running', False)
+        writer = ei.ScriptWriter
+        if is_wininst:
+            exec_param = "python.exe"
+            writer = ei.WindowsScriptWriter
+        if exec_param == sys.executable:
+            # In case the path to the Python executable contains a space, wrap
+            # it so it's not split up.
+            exec_param = [exec_param]
+        # resolve the writer to the environment
+        writer = writer.best()
+        cmd = writer.command_spec_class.best().from_param(exec_param)
+        for args in writer.get_args(dist, cmd.as_header()):
+            self.write_script(*args)
+
+    def write_script(self, script_name, contents, mode="t", *ignored):
+        """Write an executable file to the scripts directory"""
+        from setuptools.command.easy_install import chmod, current_umask
+
+        log.info("Installing %s script to %s", script_name, self.install_dir)
+        target = os.path.join(self.install_dir, script_name)
+        self.outfiles.append(target)
+
+        mask = current_umask()
+        if not self.dry_run:
+            ensure_directory(target)
+            f = open(target, "w" + mode)
+            f.write(contents)
+            f.close()
+            chmod(target, 0o777 - mask)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/launcher manifest.xml b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/launcher manifest.xml
new file mode 100644
index 0000000..5972a96
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/launcher manifest.xml	
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+    <assemblyIdentity version="1.0.0.0"
+                      processorArchitecture="X86"
+                      name="%(name)s"
+                      type="win32"/>
+    <!-- Identify the application security requirements. -->
+    <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+        <security>
+            <requestedPrivileges>
+                <requestedExecutionLevel level="asInvoker" uiAccess="false"/>
+            </requestedPrivileges>
+        </security>
+    </trustInfo>
+</assembly>
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/py36compat.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/py36compat.py
new file mode 100644
index 0000000..61063e7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/py36compat.py
@@ -0,0 +1,136 @@
+import os
+from glob import glob
+from distutils.util import convert_path
+from distutils.command import sdist
+
+from setuptools.extern.six.moves import filter
+
+
+class sdist_add_defaults:
+    """
+    Mix-in providing forward-compatibility for functionality as found in
+    distutils on Python 3.7.
+
+    Do not edit the code in this class except to update functionality
+    as implemented in distutils. Instead, override in the subclass.
+    """
+
+    def add_defaults(self):
+        """Add all the default files to self.filelist:
+          - README or README.txt
+          - setup.py
+          - test/test*.py
+          - all pure Python modules mentioned in setup script
+          - all files pointed by package_data (build_py)
+          - all files defined in data_files.
+          - all files defined as scripts.
+          - all C sources listed as part of extensions or C libraries
+            in the setup script (doesn't catch C headers!)
+        Warns if (README or README.txt) or setup.py are missing; everything
+        else is optional.
+        """
+        self._add_defaults_standards()
+        self._add_defaults_optional()
+        self._add_defaults_python()
+        self._add_defaults_data_files()
+        self._add_defaults_ext()
+        self._add_defaults_c_libs()
+        self._add_defaults_scripts()
+
+    @staticmethod
+    def _cs_path_exists(fspath):
+        """
+        Case-sensitive path existence check
+
+        >>> sdist_add_defaults._cs_path_exists(__file__)
+        True
+        >>> sdist_add_defaults._cs_path_exists(__file__.upper())
+        False
+        """
+        if not os.path.exists(fspath):
+            return False
+        # make absolute so we always have a directory
+        abspath = os.path.abspath(fspath)
+        directory, filename = os.path.split(abspath)
+        return filename in os.listdir(directory)
+
+    def _add_defaults_standards(self):
+        standards = [self.READMES, self.distribution.script_name]
+        for fn in standards:
+            if isinstance(fn, tuple):
+                alts = fn
+                got_it = False
+                for fn in alts:
+                    if self._cs_path_exists(fn):
+                        got_it = True
+                        self.filelist.append(fn)
+                        break
+
+                if not got_it:
+                    self.warn("standard file not found: should have one of " +
+                              ', '.join(alts))
+            else:
+                if self._cs_path_exists(fn):
+                    self.filelist.append(fn)
+                else:
+                    self.warn("standard file '%s' not found" % fn)
+
+    def _add_defaults_optional(self):
+        optional = ['test/test*.py', 'setup.cfg']
+        for pattern in optional:
+            files = filter(os.path.isfile, glob(pattern))
+            self.filelist.extend(files)
+
+    def _add_defaults_python(self):
+        # build_py is used to get:
+        #  - python modules
+        #  - files defined in package_data
+        build_py = self.get_finalized_command('build_py')
+
+        # getting python files
+        if self.distribution.has_pure_modules():
+            self.filelist.extend(build_py.get_source_files())
+
+        # getting package_data files
+        # (computed in build_py.data_files by build_py.finalize_options)
+        for pkg, src_dir, build_dir, filenames in build_py.data_files:
+            for filename in filenames:
+                self.filelist.append(os.path.join(src_dir, filename))
+
+    def _add_defaults_data_files(self):
+        # getting distribution.data_files
+        if self.distribution.has_data_files():
+            for item in self.distribution.data_files:
+                if isinstance(item, str):
+                    # plain file
+                    item = convert_path(item)
+                    if os.path.isfile(item):
+                        self.filelist.append(item)
+                else:
+                    # a (dirname, filenames) tuple
+                    dirname, filenames = item
+                    for f in filenames:
+                        f = convert_path(f)
+                        if os.path.isfile(f):
+                            self.filelist.append(f)
+
+    def _add_defaults_ext(self):
+        if self.distribution.has_ext_modules():
+            build_ext = self.get_finalized_command('build_ext')
+            self.filelist.extend(build_ext.get_source_files())
+
+    def _add_defaults_c_libs(self):
+        if self.distribution.has_c_libraries():
+            build_clib = self.get_finalized_command('build_clib')
+            self.filelist.extend(build_clib.get_source_files())
+
+    def _add_defaults_scripts(self):
+        if self.distribution.has_scripts():
+            build_scripts = self.get_finalized_command('build_scripts')
+            self.filelist.extend(build_scripts.get_source_files())
+
+
+if hasattr(sdist.sdist, '_add_defaults_standards'):
+    # disable the functionality already available upstream
+    class sdist_add_defaults:
+        pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/register.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/register.py
new file mode 100644
index 0000000..98bc015
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/register.py
@@ -0,0 +1,18 @@
+from distutils import log
+import distutils.command.register as orig
+
+
+class register(orig.register):
+    __doc__ = orig.register.__doc__
+
+    def run(self):
+        try:
+            # Make sure that we are using valid current name/version info
+            self.run_command('egg_info')
+            orig.register.run(self)
+        finally:
+            self.announce(
+                "WARNING: Registering is deprecated, use twine to "
+                "upload instead (https://pypi.org/p/twine/)",
+                log.WARN
+            )
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/rotate.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/rotate.py
new file mode 100644
index 0000000..b89353f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/rotate.py
@@ -0,0 +1,66 @@
+from distutils.util import convert_path
+from distutils import log
+from distutils.errors import DistutilsOptionError
+import os
+import shutil
+
+from setuptools.extern import six
+
+from setuptools import Command
+
+
+class rotate(Command):
+    """Delete older distributions"""
+
+    description = "delete older distributions, keeping N newest files"
+    user_options = [
+        ('match=', 'm', "patterns to match (required)"),
+        ('dist-dir=', 'd', "directory where the distributions are"),
+        ('keep=', 'k', "number of matching distributions to keep"),
+    ]
+
+    boolean_options = []
+
+    def initialize_options(self):
+        self.match = None
+        self.dist_dir = None
+        self.keep = None
+
+    def finalize_options(self):
+        if self.match is None:
+            raise DistutilsOptionError(
+                "Must specify one or more (comma-separated) match patterns "
+                "(e.g. '.zip' or '.egg')"
+            )
+        if self.keep is None:
+            raise DistutilsOptionError("Must specify number of files to keep")
+        try:
+            self.keep = int(self.keep)
+        except ValueError:
+            raise DistutilsOptionError("--keep must be an integer")
+        if isinstance(self.match, six.string_types):
+            self.match = [
+                convert_path(p.strip()) for p in self.match.split(',')
+            ]
+        self.set_undefined_options('bdist', ('dist_dir', 'dist_dir'))
+
+    def run(self):
+        self.run_command("egg_info")
+        from glob import glob
+
+        for pattern in self.match:
+            pattern = self.distribution.get_name() + '*' + pattern
+            files = glob(os.path.join(self.dist_dir, pattern))
+            files = [(os.path.getmtime(f), f) for f in files]
+            files.sort()
+            files.reverse()
+
+            log.info("%d file(s) matching %s", len(files), pattern)
+            files = files[self.keep:]
+            for (t, f) in files:
+                log.info("Deleting %s", f)
+                if not self.dry_run:
+                    if os.path.isdir(f):
+                        shutil.rmtree(f)
+                    else:
+                        os.unlink(f)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/saveopts.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/saveopts.py
new file mode 100644
index 0000000..611cec5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/saveopts.py
@@ -0,0 +1,22 @@
+from setuptools.command.setopt import edit_config, option_base
+
+
+class saveopts(option_base):
+    """Save command-line options to a file"""
+
+    description = "save supplied options to setup.cfg or other config file"
+
+    def run(self):
+        dist = self.distribution
+        settings = {}
+
+        for cmd in dist.command_options:
+
+            if cmd == 'saveopts':
+                continue  # don't save our own options!
+
+            for opt, (src, val) in dist.get_option_dict(cmd).items():
+                if src == "command line":
+                    settings.setdefault(cmd, {})[opt] = val
+
+        edit_config(self.filename, settings, self.dry_run)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/sdist.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/sdist.py
new file mode 100644
index 0000000..dc25398
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/sdist.py
@@ -0,0 +1,221 @@
+from distutils import log
+import distutils.command.sdist as orig
+import os
+import sys
+import io
+import contextlib
+
+from setuptools.extern import six
+
+from .py36compat import sdist_add_defaults
+
+import pkg_resources
+
+_default_revctrl = list
+
+
+def walk_revctrl(dirname=''):
+    """Find all files under revision control"""
+    for ep in pkg_resources.iter_entry_points('setuptools.file_finders'):
+        for item in ep.load()(dirname):
+            yield item
+
+
+class sdist(sdist_add_defaults, orig.sdist):
+    """Smart sdist that finds anything supported by revision control"""
+
+    user_options = [
+        ('formats=', None,
+         "formats for source distribution (comma-separated list)"),
+        ('keep-temp', 'k',
+         "keep the distribution tree around after creating " +
+         "archive file(s)"),
+        ('dist-dir=', 'd',
+         "directory to put the source distribution archive(s) in "
+         "[default: dist]"),
+    ]
+
+    negative_opt = {}
+
+    README_EXTENSIONS = ['', '.rst', '.txt', '.md']
+    READMES = tuple('README{0}'.format(ext) for ext in README_EXTENSIONS)
+
+    def run(self):
+        self.run_command('egg_info')
+        ei_cmd = self.get_finalized_command('egg_info')
+        self.filelist = ei_cmd.filelist
+        self.filelist.append(os.path.join(ei_cmd.egg_info, 'SOURCES.txt'))
+        self.check_readme()
+
+        # Run sub commands
+        for cmd_name in self.get_sub_commands():
+            self.run_command(cmd_name)
+
+        self.make_distribution()
+
+        dist_files = getattr(self.distribution, 'dist_files', [])
+        for file in self.archive_files:
+            data = ('sdist', '', file)
+            if data not in dist_files:
+                dist_files.append(data)
+
+    def initialize_options(self):
+        orig.sdist.initialize_options(self)
+
+        self._default_to_gztar()
+
+    def _default_to_gztar(self):
+        # only needed on Python prior to 3.6.
+        if sys.version_info >= (3, 6, 0, 'beta', 1):
+            return
+        self.formats = ['gztar']
+
+    def make_distribution(self):
+        """
+        Workaround for #516
+        """
+        with self._remove_os_link():
+            orig.sdist.make_distribution(self)
+
+    @staticmethod
+    @contextlib.contextmanager
+    def _remove_os_link():
+        """
+        In a context, remove and restore os.link if it exists
+        """
+
+        class NoValue:
+            pass
+
+        orig_val = getattr(os, 'link', NoValue)
+        try:
+            del os.link
+        except Exception:
+            pass
+        try:
+            yield
+        finally:
+            if orig_val is not NoValue:
+                setattr(os, 'link', orig_val)
+
+    def __read_template_hack(self):
+        # This grody hack closes the template file (MANIFEST.in) if an
+        #  exception occurs during read_template.
+        # Doing so prevents an error when easy_install attempts to delete the
+        #  file.
+        try:
+            orig.sdist.read_template(self)
+        except Exception:
+            _, _, tb = sys.exc_info()
+            tb.tb_next.tb_frame.f_locals['template'].close()
+            raise
+
+    # Beginning with Python 2.7.2, 3.1.4, and 3.2.1, this leaky file handle
+    #  has been fixed, so only override the method if we're using an earlier
+    #  Python.
+    has_leaky_handle = (
+        sys.version_info < (2, 7, 2)
+        or (3, 0) <= sys.version_info < (3, 1, 4)
+        or (3, 2) <= sys.version_info < (3, 2, 1)
+    )
+    if has_leaky_handle:
+        read_template = __read_template_hack
+
+    def _add_defaults_python(self):
+        """getting python files"""
+        if self.distribution.has_pure_modules():
+            build_py = self.get_finalized_command('build_py')
+            self.filelist.extend(build_py.get_source_files())
+            # This functionality is incompatible with include_package_data, and
+            # will in fact create an infinite recursion if include_package_data
+            # is True.  Use of include_package_data will imply that
+            # distutils-style automatic handling of package_data is disabled
+            if not self.distribution.include_package_data:
+                for _, src_dir, _, filenames in build_py.data_files:
+                    self.filelist.extend([os.path.join(src_dir, filename)
+                                          for filename in filenames])
+
+    def _add_defaults_data_files(self):
+        try:
+            if six.PY2:
+                sdist_add_defaults._add_defaults_data_files(self)
+            else:
+                super()._add_defaults_data_files()
+        except TypeError:
+            log.warn("data_files contains unexpected objects")
+
+    def check_readme(self):
+        for f in self.READMES:
+            if os.path.exists(f):
+                return
+        else:
+            self.warn(
+                "standard file not found: should have one of " +
+                ', '.join(self.READMES)
+            )
+
+    def make_release_tree(self, base_dir, files):
+        orig.sdist.make_release_tree(self, base_dir, files)
+
+        # Save any egg_info command line options used to create this sdist
+        dest = os.path.join(base_dir, 'setup.cfg')
+        if hasattr(os, 'link') and os.path.exists(dest):
+            # unlink and re-copy, since it might be hard-linked, and
+            # we don't want to change the source version
+            os.unlink(dest)
+            self.copy_file('setup.cfg', dest)
+
+        self.get_finalized_command('egg_info').save_version_info(dest)
+
+    def _manifest_is_not_generated(self):
+        # check for special comment used in 2.7.1 and higher
+        if not os.path.isfile(self.manifest):
+            return False
+
+        with io.open(self.manifest, 'rb') as fp:
+            first_line = fp.readline()
+        return (first_line !=
+                '# file GENERATED by distutils, do NOT edit\n'.encode())
+
+    def read_manifest(self):
+        """Read the manifest file (named by 'self.manifest') and use it to
+        fill in 'self.filelist', the list of files to include in the source
+        distribution.
+        """
+        log.info("reading manifest file '%s'", self.manifest)
+        manifest = open(self.manifest, 'rb')
+        for line in manifest:
+            # The manifest must contain UTF-8. See #303.
+            if six.PY3:
+                try:
+                    line = line.decode('UTF-8')
+                except UnicodeDecodeError:
+                    log.warn("%r not UTF-8 decodable -- skipping" % line)
+                    continue
+            # ignore comments and blank lines
+            line = line.strip()
+            if line.startswith('#') or not line:
+                continue
+            self.filelist.append(line)
+        manifest.close()
+
+    def check_license(self):
+        """Checks if license_file' is configured and adds it to
+        'self.filelist' if the value contains a valid path.
+        """
+
+        opts = self.distribution.get_option_dict('metadata')
+
+        # ignore the source of the value
+        _, license_file = opts.get('license_file', (None, None))
+
+        if license_file is None:
+            log.debug("'license_file' option was not specified")
+            return
+
+        if not os.path.exists(license_file):
+            log.warn("warning: Failed to find the configured license file '%s'",
+                    license_file)
+            return
+
+        self.filelist.append(license_file)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/setopt.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/setopt.py
new file mode 100644
index 0000000..7e57cc0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/setopt.py
@@ -0,0 +1,149 @@
+from distutils.util import convert_path
+from distutils import log
+from distutils.errors import DistutilsOptionError
+import distutils
+import os
+
+from setuptools.extern.six.moves import configparser
+
+from setuptools import Command
+
+__all__ = ['config_file', 'edit_config', 'option_base', 'setopt']
+
+
+def config_file(kind="local"):
+    """Get the filename of the distutils, local, global, or per-user config
+
+    `kind` must be one of "local", "global", or "user"
+    """
+    if kind == 'local':
+        return 'setup.cfg'
+    if kind == 'global':
+        return os.path.join(
+            os.path.dirname(distutils.__file__), 'distutils.cfg'
+        )
+    if kind == 'user':
+        dot = os.name == 'posix' and '.' or ''
+        return os.path.expanduser(convert_path("~/%spydistutils.cfg" % dot))
+    raise ValueError(
+        "config_file() type must be 'local', 'global', or 'user'", kind
+    )
+
+
+def edit_config(filename, settings, dry_run=False):
+    """Edit a configuration file to include `settings`
+
+    `settings` is a dictionary of dictionaries or ``None`` values, keyed by
+    command/section name.  A ``None`` value means to delete the entire section,
+    while a dictionary lists settings to be changed or deleted in that section.
+    A setting of ``None`` means to delete that setting.
+    """
+    log.debug("Reading configuration from %s", filename)
+    opts = configparser.RawConfigParser()
+    opts.read([filename])
+    for section, options in settings.items():
+        if options is None:
+            log.info("Deleting section [%s] from %s", section, filename)
+            opts.remove_section(section)
+        else:
+            if not opts.has_section(section):
+                log.debug("Adding new section [%s] to %s", section, filename)
+                opts.add_section(section)
+            for option, value in options.items():
+                if value is None:
+                    log.debug(
+                        "Deleting %s.%s from %s",
+                        section, option, filename
+                    )
+                    opts.remove_option(section, option)
+                    if not opts.options(section):
+                        log.info("Deleting empty [%s] section from %s",
+                                 section, filename)
+                        opts.remove_section(section)
+                else:
+                    log.debug(
+                        "Setting %s.%s to %r in %s",
+                        section, option, value, filename
+                    )
+                    opts.set(section, option, value)
+
+    log.info("Writing %s", filename)
+    if not dry_run:
+        with open(filename, 'w') as f:
+            opts.write(f)
+
+
+class option_base(Command):
+    """Abstract base class for commands that mess with config files"""
+
+    user_options = [
+        ('global-config', 'g',
+         "save options to the site-wide distutils.cfg file"),
+        ('user-config', 'u',
+         "save options to the current user's pydistutils.cfg file"),
+        ('filename=', 'f',
+         "configuration file to use (default=setup.cfg)"),
+    ]
+
+    boolean_options = [
+        'global-config', 'user-config',
+    ]
+
+    def initialize_options(self):
+        self.global_config = None
+        self.user_config = None
+        self.filename = None
+
+    def finalize_options(self):
+        filenames = []
+        if self.global_config:
+            filenames.append(config_file('global'))
+        if self.user_config:
+            filenames.append(config_file('user'))
+        if self.filename is not None:
+            filenames.append(self.filename)
+        if not filenames:
+            filenames.append(config_file('local'))
+        if len(filenames) > 1:
+            raise DistutilsOptionError(
+                "Must specify only one configuration file option",
+                filenames
+            )
+        self.filename, = filenames
+
+
+class setopt(option_base):
+    """Save command-line options to a file"""
+
+    description = "set an option in setup.cfg or another config file"
+
+    user_options = [
+        ('command=', 'c', 'command to set an option for'),
+        ('option=', 'o', 'option to set'),
+        ('set-value=', 's', 'value of the option'),
+        ('remove', 'r', 'remove (unset) the value'),
+    ] + option_base.user_options
+
+    boolean_options = option_base.boolean_options + ['remove']
+
+    def initialize_options(self):
+        option_base.initialize_options(self)
+        self.command = None
+        self.option = None
+        self.set_value = None
+        self.remove = None
+
+    def finalize_options(self):
+        option_base.finalize_options(self)
+        if self.command is None or self.option is None:
+            raise DistutilsOptionError("Must specify --command *and* --option")
+        if self.set_value is None and not self.remove:
+            raise DistutilsOptionError("Must specify --set-value or --remove")
+
+    def run(self):
+        edit_config(
+            self.filename, {
+                self.command: {self.option.replace('-', '_'): self.set_value}
+            },
+            self.dry_run
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/test.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/test.py
new file mode 100644
index 0000000..c148b38
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/test.py
@@ -0,0 +1,279 @@
+import os
+import operator
+import sys
+import contextlib
+import itertools
+import unittest
+from distutils.errors import DistutilsError, DistutilsOptionError
+from distutils import log
+from unittest import TestLoader
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import map, filter
+
+from pkg_resources import (resource_listdir, resource_exists, normalize_path,
+                           working_set, _namespace_packages, evaluate_marker,
+                           add_activation_listener, require, EntryPoint)
+from setuptools import Command
+from .build_py import _unique_everseen
+
+__metaclass__ = type
+
+
+class ScanningLoader(TestLoader):
+
+    def __init__(self):
+        TestLoader.__init__(self)
+        self._visited = set()
+
+    def loadTestsFromModule(self, module, pattern=None):
+        """Return a suite of all tests cases contained in the given module
+
+        If the module is a package, load tests from all the modules in it.
+        If the module has an ``additional_tests`` function, call it and add
+        the return value to the tests.
+        """
+        if module in self._visited:
+            return None
+        self._visited.add(module)
+
+        tests = []
+        tests.append(TestLoader.loadTestsFromModule(self, module))
+
+        if hasattr(module, "additional_tests"):
+            tests.append(module.additional_tests())
+
+        if hasattr(module, '__path__'):
+            for file in resource_listdir(module.__name__, ''):
+                if file.endswith('.py') and file != '__init__.py':
+                    submodule = module.__name__ + '.' + file[:-3]
+                else:
+                    if resource_exists(module.__name__, file + '/__init__.py'):
+                        submodule = module.__name__ + '.' + file
+                    else:
+                        continue
+                tests.append(self.loadTestsFromName(submodule))
+
+        if len(tests) != 1:
+            return self.suiteClass(tests)
+        else:
+            return tests[0]  # don't create a nested suite for only one return
+
+
+# adapted from jaraco.classes.properties:NonDataProperty
+class NonDataProperty:
+    def __init__(self, fget):
+        self.fget = fget
+
+    def __get__(self, obj, objtype=None):
+        if obj is None:
+            return self
+        return self.fget(obj)
+
+
+class test(Command):
+    """Command to run unit tests after in-place build"""
+
+    description = "run unit tests after in-place build (deprecated)"
+
+    user_options = [
+        ('test-module=', 'm', "Run 'test_suite' in specified module"),
+        ('test-suite=', 's',
+         "Run single test, case or suite (e.g. 'module.test_suite')"),
+        ('test-runner=', 'r', "Test runner to use"),
+    ]
+
+    def initialize_options(self):
+        self.test_suite = None
+        self.test_module = None
+        self.test_loader = None
+        self.test_runner = None
+
+    def finalize_options(self):
+
+        if self.test_suite and self.test_module:
+            msg = "You may specify a module or a suite, but not both"
+            raise DistutilsOptionError(msg)
+
+        if self.test_suite is None:
+            if self.test_module is None:
+                self.test_suite = self.distribution.test_suite
+            else:
+                self.test_suite = self.test_module + ".test_suite"
+
+        if self.test_loader is None:
+            self.test_loader = getattr(self.distribution, 'test_loader', None)
+        if self.test_loader is None:
+            self.test_loader = "setuptools.command.test:ScanningLoader"
+        if self.test_runner is None:
+            self.test_runner = getattr(self.distribution, 'test_runner', None)
+
+    @NonDataProperty
+    def test_args(self):
+        return list(self._test_args())
+
+    def _test_args(self):
+        if not self.test_suite and sys.version_info >= (2, 7):
+            yield 'discover'
+        if self.verbose:
+            yield '--verbose'
+        if self.test_suite:
+            yield self.test_suite
+
+    def with_project_on_sys_path(self, func):
+        """
+        Backward compatibility for project_on_sys_path context.
+        """
+        with self.project_on_sys_path():
+            func()
+
+    @contextlib.contextmanager
+    def project_on_sys_path(self, include_dists=[]):
+        with_2to3 = six.PY3 and getattr(self.distribution, 'use_2to3', False)
+
+        if with_2to3:
+            # If we run 2to3 we can not do this inplace:
+
+            # Ensure metadata is up-to-date
+            self.reinitialize_command('build_py', inplace=0)
+            self.run_command('build_py')
+            bpy_cmd = self.get_finalized_command("build_py")
+            build_path = normalize_path(bpy_cmd.build_lib)
+
+            # Build extensions
+            self.reinitialize_command('egg_info', egg_base=build_path)
+            self.run_command('egg_info')
+
+            self.reinitialize_command('build_ext', inplace=0)
+            self.run_command('build_ext')
+        else:
+            # Without 2to3 inplace works fine:
+            self.run_command('egg_info')
+
+            # Build extensions in-place
+            self.reinitialize_command('build_ext', inplace=1)
+            self.run_command('build_ext')
+
+        ei_cmd = self.get_finalized_command("egg_info")
+
+        old_path = sys.path[:]
+        old_modules = sys.modules.copy()
+
+        try:
+            project_path = normalize_path(ei_cmd.egg_base)
+            sys.path.insert(0, project_path)
+            working_set.__init__()
+            add_activation_listener(lambda dist: dist.activate())
+            require('%s==%s' % (ei_cmd.egg_name, ei_cmd.egg_version))
+            with self.paths_on_pythonpath([project_path]):
+                yield
+        finally:
+            sys.path[:] = old_path
+            sys.modules.clear()
+            sys.modules.update(old_modules)
+            working_set.__init__()
+
+    @staticmethod
+    @contextlib.contextmanager
+    def paths_on_pythonpath(paths):
+        """
+        Add the indicated paths to the head of the PYTHONPATH environment
+        variable so that subprocesses will also see the packages at
+        these paths.
+
+        Do this in a context that restores the value on exit.
+        """
+        nothing = object()
+        orig_pythonpath = os.environ.get('PYTHONPATH', nothing)
+        current_pythonpath = os.environ.get('PYTHONPATH', '')
+        try:
+            prefix = os.pathsep.join(_unique_everseen(paths))
+            to_join = filter(None, [prefix, current_pythonpath])
+            new_path = os.pathsep.join(to_join)
+            if new_path:
+                os.environ['PYTHONPATH'] = new_path
+            yield
+        finally:
+            if orig_pythonpath is nothing:
+                os.environ.pop('PYTHONPATH', None)
+            else:
+                os.environ['PYTHONPATH'] = orig_pythonpath
+
+    @staticmethod
+    def install_dists(dist):
+        """
+        Install the requirements indicated by self.distribution and
+        return an iterable of the dists that were built.
+        """
+        ir_d = dist.fetch_build_eggs(dist.install_requires)
+        tr_d = dist.fetch_build_eggs(dist.tests_require or [])
+        er_d = dist.fetch_build_eggs(
+            v for k, v in dist.extras_require.items()
+            if k.startswith(':') and evaluate_marker(k[1:])
+        )
+        return itertools.chain(ir_d, tr_d, er_d)
+
+    def run(self):
+        self.announce(
+            "WARNING: Testing via this command is deprecated and will be "
+            "removed in a future version. Users looking for a generic test "
+            "entry point independent of test runner are encouraged to use "
+            "tox.",
+            log.WARN,
+        )
+
+        installed_dists = self.install_dists(self.distribution)
+
+        cmd = ' '.join(self._argv)
+        if self.dry_run:
+            self.announce('skipping "%s" (dry run)' % cmd)
+            return
+
+        self.announce('running "%s"' % cmd)
+
+        paths = map(operator.attrgetter('location'), installed_dists)
+        with self.paths_on_pythonpath(paths):
+            with self.project_on_sys_path():
+                self.run_tests()
+
+    def run_tests(self):
+        # Purge modules under test from sys.modules. The test loader will
+        # re-import them from the build location. Required when 2to3 is used
+        # with namespace packages.
+        if six.PY3 and getattr(self.distribution, 'use_2to3', False):
+            module = self.test_suite.split('.')[0]
+            if module in _namespace_packages:
+                del_modules = []
+                if module in sys.modules:
+                    del_modules.append(module)
+                module += '.'
+                for name in sys.modules:
+                    if name.startswith(module):
+                        del_modules.append(name)
+                list(map(sys.modules.__delitem__, del_modules))
+
+        test = unittest.main(
+            None, None, self._argv,
+            testLoader=self._resolve_as_ep(self.test_loader),
+            testRunner=self._resolve_as_ep(self.test_runner),
+            exit=False,
+        )
+        if not test.result.wasSuccessful():
+            msg = 'Test failed: %s' % test.result
+            self.announce(msg, log.ERROR)
+            raise DistutilsError(msg)
+
+    @property
+    def _argv(self):
+        return ['unittest'] + self.test_args
+
+    @staticmethod
+    def _resolve_as_ep(val):
+        """
+        Load the indicated attribute value, called, as a as if it were
+        specified as an entry point.
+        """
+        if val is None:
+            return
+        parsed = EntryPoint.parse("x=" + val)
+        return parsed.resolve()()
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/upload.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/upload.py
new file mode 100644
index 0000000..6db8888
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/upload.py
@@ -0,0 +1,196 @@
+import io
+import os
+import hashlib
+import getpass
+
+from base64 import standard_b64encode
+
+from distutils import log
+from distutils.command import upload as orig
+from distutils.spawn import spawn
+
+from distutils.errors import DistutilsError
+
+from setuptools.extern.six.moves.urllib.request import urlopen, Request
+from setuptools.extern.six.moves.urllib.error import HTTPError
+from setuptools.extern.six.moves.urllib.parse import urlparse
+
+
+class upload(orig.upload):
+    """
+    Override default upload behavior to obtain password
+    in a variety of different ways.
+    """
+    def run(self):
+        try:
+            orig.upload.run(self)
+        finally:
+            self.announce(
+                "WARNING: Uploading via this command is deprecated, use twine "
+                "to upload instead (https://pypi.org/p/twine/)",
+                log.WARN
+            )
+
+    def finalize_options(self):
+        orig.upload.finalize_options(self)
+        self.username = (
+            self.username or
+            getpass.getuser()
+        )
+        # Attempt to obtain password. Short circuit evaluation at the first
+        # sign of success.
+        self.password = (
+            self.password or
+            self._load_password_from_keyring() or
+            self._prompt_for_password()
+        )
+
+    def upload_file(self, command, pyversion, filename):
+        # Makes sure the repository URL is compliant
+        schema, netloc, url, params, query, fragments = \
+            urlparse(self.repository)
+        if params or query or fragments:
+            raise AssertionError("Incompatible url %s" % self.repository)
+
+        if schema not in ('http', 'https'):
+            raise AssertionError("unsupported schema " + schema)
+
+        # Sign if requested
+        if self.sign:
+            gpg_args = ["gpg", "--detach-sign", "-a", filename]
+            if self.identity:
+                gpg_args[2:2] = ["--local-user", self.identity]
+            spawn(gpg_args,
+                  dry_run=self.dry_run)
+
+        # Fill in the data - send all the meta-data in case we need to
+        # register a new release
+        with open(filename, 'rb') as f:
+            content = f.read()
+
+        meta = self.distribution.metadata
+
+        data = {
+            # action
+            ':action': 'file_upload',
+            'protocol_version': '1',
+
+            # identify release
+            'name': meta.get_name(),
+            'version': meta.get_version(),
+
+            # file content
+            'content': (os.path.basename(filename), content),
+            'filetype': command,
+            'pyversion': pyversion,
+            'md5_digest': hashlib.md5(content).hexdigest(),
+
+            # additional meta-data
+            'metadata_version': str(meta.get_metadata_version()),
+            'summary': meta.get_description(),
+            'home_page': meta.get_url(),
+            'author': meta.get_contact(),
+            'author_email': meta.get_contact_email(),
+            'license': meta.get_licence(),
+            'description': meta.get_long_description(),
+            'keywords': meta.get_keywords(),
+            'platform': meta.get_platforms(),
+            'classifiers': meta.get_classifiers(),
+            'download_url': meta.get_download_url(),
+            # PEP 314
+            'provides': meta.get_provides(),
+            'requires': meta.get_requires(),
+            'obsoletes': meta.get_obsoletes(),
+            }
+
+        data['comment'] = ''
+
+        if self.sign:
+            data['gpg_signature'] = (os.path.basename(filename) + ".asc",
+                                     open(filename+".asc", "rb").read())
+
+        # set up the authentication
+        user_pass = (self.username + ":" + self.password).encode('ascii')
+        # The exact encoding of the authentication string is debated.
+        # Anyway PyPI only accepts ascii for both username or password.
+        auth = "Basic " + standard_b64encode(user_pass).decode('ascii')
+
+        # Build up the MIME payload for the POST data
+        boundary = '--------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
+        sep_boundary = b'\r\n--' + boundary.encode('ascii')
+        end_boundary = sep_boundary + b'--\r\n'
+        body = io.BytesIO()
+        for key, value in data.items():
+            title = '\r\nContent-Disposition: form-data; name="%s"' % key
+            # handle multiple entries for the same name
+            if not isinstance(value, list):
+                value = [value]
+            for value in value:
+                if type(value) is tuple:
+                    title += '; filename="%s"' % value[0]
+                    value = value[1]
+                else:
+                    value = str(value).encode('utf-8')
+                body.write(sep_boundary)
+                body.write(title.encode('utf-8'))
+                body.write(b"\r\n\r\n")
+                body.write(value)
+        body.write(end_boundary)
+        body = body.getvalue()
+
+        msg = "Submitting %s to %s" % (filename, self.repository)
+        self.announce(msg, log.INFO)
+
+        # build the Request
+        headers = {
+            'Content-type': 'multipart/form-data; boundary=%s' % boundary,
+            'Content-length': str(len(body)),
+            'Authorization': auth,
+        }
+
+        request = Request(self.repository, data=body,
+                          headers=headers)
+        # send the data
+        try:
+            result = urlopen(request)
+            status = result.getcode()
+            reason = result.msg
+        except HTTPError as e:
+            status = e.code
+            reason = e.msg
+        except OSError as e:
+            self.announce(str(e), log.ERROR)
+            raise
+
+        if status == 200:
+            self.announce('Server response (%s): %s' % (status, reason),
+                          log.INFO)
+            if self.show_response:
+                text = getattr(self, '_read_pypi_response',
+                               lambda x: None)(result)
+                if text is not None:
+                    msg = '\n'.join(('-' * 75, text, '-' * 75))
+                    self.announce(msg, log.INFO)
+        else:
+            msg = 'Upload failed (%s): %s' % (status, reason)
+            self.announce(msg, log.ERROR)
+            raise DistutilsError(msg)
+
+    def _load_password_from_keyring(self):
+        """
+        Attempt to load password from keyring. Suppress Exceptions.
+        """
+        try:
+            keyring = __import__('keyring')
+            return keyring.get_password(self.repository, self.username)
+        except Exception:
+            pass
+
+    def _prompt_for_password(self):
+        """
+        Prompt for a password on the tty. Suppress Exceptions.
+        """
+        try:
+            return getpass.getpass()
+        except (Exception, KeyboardInterrupt):
+            pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/command/upload_docs.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/upload_docs.py
new file mode 100644
index 0000000..07aa564
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/command/upload_docs.py
@@ -0,0 +1,206 @@
+# -*- coding: utf-8 -*-
+"""upload_docs
+
+Implements a Distutils 'upload_docs' subcommand (upload documentation to
+PyPI's pythonhosted.org).
+"""
+
+from base64 import standard_b64encode
+from distutils import log
+from distutils.errors import DistutilsOptionError
+import os
+import socket
+import zipfile
+import tempfile
+import shutil
+import itertools
+import functools
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import http_client, urllib
+
+from pkg_resources import iter_entry_points
+from .upload import upload
+
+
+def _encode(s):
+    errors = 'surrogateescape' if six.PY3 else 'strict'
+    return s.encode('utf-8', errors)
+
+
+class upload_docs(upload):
+    # override the default repository as upload_docs isn't
+    # supported by Warehouse (and won't be).
+    DEFAULT_REPOSITORY = 'https://pypi.python.org/pypi/'
+
+    description = 'Upload documentation to PyPI'
+
+    user_options = [
+        ('repository=', 'r',
+         "url of repository [default: %s]" % upload.DEFAULT_REPOSITORY),
+        ('show-response', None,
+         'display full response text from server'),
+        ('upload-dir=', None, 'directory to upload'),
+    ]
+    boolean_options = upload.boolean_options
+
+    def has_sphinx(self):
+        if self.upload_dir is None:
+            for ep in iter_entry_points('distutils.commands', 'build_sphinx'):
+                return True
+
+    sub_commands = [('build_sphinx', has_sphinx)]
+
+    def initialize_options(self):
+        upload.initialize_options(self)
+        self.upload_dir = None
+        self.target_dir = None
+
+    def finalize_options(self):
+        upload.finalize_options(self)
+        if self.upload_dir is None:
+            if self.has_sphinx():
+                build_sphinx = self.get_finalized_command('build_sphinx')
+                self.target_dir = build_sphinx.builder_target_dir
+            else:
+                build = self.get_finalized_command('build')
+                self.target_dir = os.path.join(build.build_base, 'docs')
+        else:
+            self.ensure_dirname('upload_dir')
+            self.target_dir = self.upload_dir
+        if 'pypi.python.org' in self.repository:
+            log.warn("Upload_docs command is deprecated. Use RTD instead.")
+        self.announce('Using upload directory %s' % self.target_dir)
+
+    def create_zipfile(self, filename):
+        zip_file = zipfile.ZipFile(filename, "w")
+        try:
+            self.mkpath(self.target_dir)  # just in case
+            for root, dirs, files in os.walk(self.target_dir):
+                if root == self.target_dir and not files:
+                    tmpl = "no files found in upload directory '%s'"
+                    raise DistutilsOptionError(tmpl % self.target_dir)
+                for name in files:
+                    full = os.path.join(root, name)
+                    relative = root[len(self.target_dir):].lstrip(os.path.sep)
+                    dest = os.path.join(relative, name)
+                    zip_file.write(full, dest)
+        finally:
+            zip_file.close()
+
+    def run(self):
+        # Run sub commands
+        for cmd_name in self.get_sub_commands():
+            self.run_command(cmd_name)
+
+        tmp_dir = tempfile.mkdtemp()
+        name = self.distribution.metadata.get_name()
+        zip_file = os.path.join(tmp_dir, "%s.zip" % name)
+        try:
+            self.create_zipfile(zip_file)
+            self.upload_file(zip_file)
+        finally:
+            shutil.rmtree(tmp_dir)
+
+    @staticmethod
+    def _build_part(item, sep_boundary):
+        key, values = item
+        title = '\nContent-Disposition: form-data; name="%s"' % key
+        # handle multiple entries for the same name
+        if not isinstance(values, list):
+            values = [values]
+        for value in values:
+            if isinstance(value, tuple):
+                title += '; filename="%s"' % value[0]
+                value = value[1]
+            else:
+                value = _encode(value)
+            yield sep_boundary
+            yield _encode(title)
+            yield b"\n\n"
+            yield value
+            if value and value[-1:] == b'\r':
+                yield b'\n'  # write an extra newline (lurve Macs)
+
+    @classmethod
+    def _build_multipart(cls, data):
+        """
+        Build up the MIME payload for the POST data
+        """
+        boundary = b'--------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
+        sep_boundary = b'\n--' + boundary
+        end_boundary = sep_boundary + b'--'
+        end_items = end_boundary, b"\n",
+        builder = functools.partial(
+            cls._build_part,
+            sep_boundary=sep_boundary,
+        )
+        part_groups = map(builder, data.items())
+        parts = itertools.chain.from_iterable(part_groups)
+        body_items = itertools.chain(parts, end_items)
+        content_type = 'multipart/form-data; boundary=%s' % boundary.decode('ascii')
+        return b''.join(body_items), content_type
+
+    def upload_file(self, filename):
+        with open(filename, 'rb') as f:
+            content = f.read()
+        meta = self.distribution.metadata
+        data = {
+            ':action': 'doc_upload',
+            'name': meta.get_name(),
+            'content': (os.path.basename(filename), content),
+        }
+        # set up the authentication
+        credentials = _encode(self.username + ':' + self.password)
+        credentials = standard_b64encode(credentials)
+        if six.PY3:
+            credentials = credentials.decode('ascii')
+        auth = "Basic " + credentials
+
+        body, ct = self._build_multipart(data)
+
+        msg = "Submitting documentation to %s" % (self.repository)
+        self.announce(msg, log.INFO)
+
+        # build the Request
+        # We can't use urllib2 since we need to send the Basic
+        # auth right with the first request
+        schema, netloc, url, params, query, fragments = \
+            urllib.parse.urlparse(self.repository)
+        assert not params and not query and not fragments
+        if schema == 'http':
+            conn = http_client.HTTPConnection(netloc)
+        elif schema == 'https':
+            conn = http_client.HTTPSConnection(netloc)
+        else:
+            raise AssertionError("unsupported schema " + schema)
+
+        data = ''
+        try:
+            conn.connect()
+            conn.putrequest("POST", url)
+            content_type = ct
+            conn.putheader('Content-type', content_type)
+            conn.putheader('Content-length', str(len(body)))
+            conn.putheader('Authorization', auth)
+            conn.endheaders()
+            conn.send(body)
+        except socket.error as e:
+            self.announce(str(e), log.ERROR)
+            return
+
+        r = conn.getresponse()
+        if r.status == 200:
+            msg = 'Server response (%s): %s' % (r.status, r.reason)
+            self.announce(msg, log.INFO)
+        elif r.status == 301:
+            location = r.getheader('Location')
+            if location is None:
+                location = 'https://pythonhosted.org/%s/' % meta.get_name()
+            msg = 'Upload successful. Visit %s' % location
+            self.announce(msg, log.INFO)
+        else:
+            msg = 'Upload failed (%s): %s' % (r.status, r.reason)
+            self.announce(msg, log.ERROR)
+        if self.show_response:
+            print('-' * 75, r.read(), '-' * 75)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/config.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/config.py
new file mode 100644
index 0000000..2d50e25
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/config.py
@@ -0,0 +1,658 @@
+from __future__ import absolute_import, unicode_literals
+import io
+import os
+import sys
+
+import warnings
+import functools
+from collections import defaultdict
+from functools import partial
+from functools import wraps
+from importlib import import_module
+
+from distutils.errors import DistutilsOptionError, DistutilsFileError
+from setuptools.extern.packaging.version import LegacyVersion, parse
+from setuptools.extern.packaging.specifiers import SpecifierSet
+from setuptools.extern.six import string_types, PY3
+
+
+__metaclass__ = type
+
+
+def read_configuration(
+        filepath, find_others=False, ignore_option_errors=False):
+    """Read given configuration file and returns options from it as a dict.
+
+    :param str|unicode filepath: Path to configuration file
+        to get options from.
+
+    :param bool find_others: Whether to search for other configuration files
+        which could be on in various places.
+
+    :param bool ignore_option_errors: Whether to silently ignore
+        options, values of which could not be resolved (e.g. due to exceptions
+        in directives such as file:, attr:, etc.).
+        If False exceptions are propagated as expected.
+
+    :rtype: dict
+    """
+    from setuptools.dist import Distribution, _Distribution
+
+    filepath = os.path.abspath(filepath)
+
+    if not os.path.isfile(filepath):
+        raise DistutilsFileError(
+            'Configuration file %s does not exist.' % filepath)
+
+    current_directory = os.getcwd()
+    os.chdir(os.path.dirname(filepath))
+
+    try:
+        dist = Distribution()
+
+        filenames = dist.find_config_files() if find_others else []
+        if filepath not in filenames:
+            filenames.append(filepath)
+
+        _Distribution.parse_config_files(dist, filenames=filenames)
+
+        handlers = parse_configuration(
+            dist, dist.command_options,
+            ignore_option_errors=ignore_option_errors)
+
+    finally:
+        os.chdir(current_directory)
+
+    return configuration_to_dict(handlers)
+
+
+def _get_option(target_obj, key):
+    """
+    Given a target object and option key, get that option from
+    the target object, either through a get_{key} method or
+    from an attribute directly.
+    """
+    getter_name = 'get_{key}'.format(**locals())
+    by_attribute = functools.partial(getattr, target_obj, key)
+    getter = getattr(target_obj, getter_name, by_attribute)
+    return getter()
+
+
+def configuration_to_dict(handlers):
+    """Returns configuration data gathered by given handlers as a dict.
+
+    :param list[ConfigHandler] handlers: Handlers list,
+        usually from parse_configuration()
+
+    :rtype: dict
+    """
+    config_dict = defaultdict(dict)
+
+    for handler in handlers:
+        for option in handler.set_options:
+            value = _get_option(handler.target_obj, option)
+            config_dict[handler.section_prefix][option] = value
+
+    return config_dict
+
+
+def parse_configuration(
+        distribution, command_options, ignore_option_errors=False):
+    """Performs additional parsing of configuration options
+    for a distribution.
+
+    Returns a list of used option handlers.
+
+    :param Distribution distribution:
+    :param dict command_options:
+    :param bool ignore_option_errors: Whether to silently ignore
+        options, values of which could not be resolved (e.g. due to exceptions
+        in directives such as file:, attr:, etc.).
+        If False exceptions are propagated as expected.
+    :rtype: list
+    """
+    options = ConfigOptionsHandler(
+        distribution, command_options, ignore_option_errors)
+    options.parse()
+
+    meta = ConfigMetadataHandler(
+        distribution.metadata, command_options, ignore_option_errors,
+        distribution.package_dir)
+    meta.parse()
+
+    return meta, options
+
+
+class ConfigHandler:
+    """Handles metadata supplied in configuration files."""
+
+    section_prefix = None
+    """Prefix for config sections handled by this handler.
+    Must be provided by class heirs.
+
+    """
+
+    aliases = {}
+    """Options aliases.
+    For compatibility with various packages. E.g.: d2to1 and pbr.
+    Note: `-` in keys is replaced with `_` by config parser.
+
+    """
+
+    def __init__(self, target_obj, options, ignore_option_errors=False):
+        sections = {}
+
+        section_prefix = self.section_prefix
+        for section_name, section_options in options.items():
+            if not section_name.startswith(section_prefix):
+                continue
+
+            section_name = section_name.replace(section_prefix, '').strip('.')
+            sections[section_name] = section_options
+
+        self.ignore_option_errors = ignore_option_errors
+        self.target_obj = target_obj
+        self.sections = sections
+        self.set_options = []
+
+    @property
+    def parsers(self):
+        """Metadata item name to parser function mapping."""
+        raise NotImplementedError(
+            '%s must provide .parsers property' % self.__class__.__name__)
+
+    def __setitem__(self, option_name, value):
+        unknown = tuple()
+        target_obj = self.target_obj
+
+        # Translate alias into real name.
+        option_name = self.aliases.get(option_name, option_name)
+
+        current_value = getattr(target_obj, option_name, unknown)
+
+        if current_value is unknown:
+            raise KeyError(option_name)
+
+        if current_value:
+            # Already inhabited. Skipping.
+            return
+
+        skip_option = False
+        parser = self.parsers.get(option_name)
+        if parser:
+            try:
+                value = parser(value)
+
+            except Exception:
+                skip_option = True
+                if not self.ignore_option_errors:
+                    raise
+
+        if skip_option:
+            return
+
+        setter = getattr(target_obj, 'set_%s' % option_name, None)
+        if setter is None:
+            setattr(target_obj, option_name, value)
+        else:
+            setter(value)
+
+        self.set_options.append(option_name)
+
+    @classmethod
+    def _parse_list(cls, value, separator=','):
+        """Represents value as a list.
+
+        Value is split either by separator (defaults to comma) or by lines.
+
+        :param value:
+        :param separator: List items separator character.
+        :rtype: list
+        """
+        if isinstance(value, list):  # _get_parser_compound case
+            return value
+
+        if '\n' in value:
+            value = value.splitlines()
+        else:
+            value = value.split(separator)
+
+        return [chunk.strip() for chunk in value if chunk.strip()]
+
+    @classmethod
+    def _parse_dict(cls, value):
+        """Represents value as a dict.
+
+        :param value:
+        :rtype: dict
+        """
+        separator = '='
+        result = {}
+        for line in cls._parse_list(value):
+            key, sep, val = line.partition(separator)
+            if sep != separator:
+                raise DistutilsOptionError(
+                    'Unable to parse option value to dict: %s' % value)
+            result[key.strip()] = val.strip()
+
+        return result
+
+    @classmethod
+    def _parse_bool(cls, value):
+        """Represents value as boolean.
+
+        :param value:
+        :rtype: bool
+        """
+        value = value.lower()
+        return value in ('1', 'true', 'yes')
+
+    @classmethod
+    def _exclude_files_parser(cls, key):
+        """Returns a parser function to make sure field inputs
+        are not files.
+
+        Parses a value after getting the key so error messages are
+        more informative.
+
+        :param key:
+        :rtype: callable
+        """
+        def parser(value):
+            exclude_directive = 'file:'
+            if value.startswith(exclude_directive):
+                raise ValueError(
+                    'Only strings are accepted for the {0} field, '
+                    'files are not accepted'.format(key))
+            return value
+        return parser
+
+    @classmethod
+    def _parse_file(cls, value):
+        """Represents value as a string, allowing including text
+        from nearest files using `file:` directive.
+
+        Directive is sandboxed and won't reach anything outside
+        directory with setup.py.
+
+        Examples:
+            file: README.rst, CHANGELOG.md, src/file.txt
+
+        :param str value:
+        :rtype: str
+        """
+        include_directive = 'file:'
+
+        if not isinstance(value, string_types):
+            return value
+
+        if not value.startswith(include_directive):
+            return value
+
+        spec = value[len(include_directive):]
+        filepaths = (os.path.abspath(path.strip()) for path in spec.split(','))
+        return '\n'.join(
+            cls._read_file(path)
+            for path in filepaths
+            if (cls._assert_local(path) or True)
+            and os.path.isfile(path)
+        )
+
+    @staticmethod
+    def _assert_local(filepath):
+        if not filepath.startswith(os.getcwd()):
+            raise DistutilsOptionError(
+                '`file:` directive can not access %s' % filepath)
+
+    @staticmethod
+    def _read_file(filepath):
+        with io.open(filepath, encoding='utf-8') as f:
+            return f.read()
+
+    @classmethod
+    def _parse_attr(cls, value, package_dir=None):
+        """Represents value as a module attribute.
+
+        Examples:
+            attr: package.attr
+            attr: package.module.attr
+
+        :param str value:
+        :rtype: str
+        """
+        attr_directive = 'attr:'
+        if not value.startswith(attr_directive):
+            return value
+
+        attrs_path = value.replace(attr_directive, '').strip().split('.')
+        attr_name = attrs_path.pop()
+
+        module_name = '.'.join(attrs_path)
+        module_name = module_name or '__init__'
+
+        parent_path = os.getcwd()
+        if package_dir:
+            if attrs_path[0] in package_dir:
+                # A custom path was specified for the module we want to import
+                custom_path = package_dir[attrs_path[0]]
+                parts = custom_path.rsplit('/', 1)
+                if len(parts) > 1:
+                    parent_path = os.path.join(os.getcwd(), parts[0])
+                    module_name = parts[1]
+                else:
+                    module_name = custom_path
+            elif '' in package_dir:
+                # A custom parent directory was specified for all root modules
+                parent_path = os.path.join(os.getcwd(), package_dir[''])
+        sys.path.insert(0, parent_path)
+        try:
+            module = import_module(module_name)
+            value = getattr(module, attr_name)
+
+        finally:
+            sys.path = sys.path[1:]
+
+        return value
+
+    @classmethod
+    def _get_parser_compound(cls, *parse_methods):
+        """Returns parser function to represents value as a list.
+
+        Parses a value applying given methods one after another.
+
+        :param parse_methods:
+        :rtype: callable
+        """
+        def parse(value):
+            parsed = value
+
+            for method in parse_methods:
+                parsed = method(parsed)
+
+            return parsed
+
+        return parse
+
+    @classmethod
+    def _parse_section_to_dict(cls, section_options, values_parser=None):
+        """Parses section options into a dictionary.
+
+        Optionally applies a given parser to values.
+
+        :param dict section_options:
+        :param callable values_parser:
+        :rtype: dict
+        """
+        value = {}
+        values_parser = values_parser or (lambda val: val)
+        for key, (_, val) in section_options.items():
+            value[key] = values_parser(val)
+        return value
+
+    def parse_section(self, section_options):
+        """Parses configuration file section.
+
+        :param dict section_options:
+        """
+        for (name, (_, value)) in section_options.items():
+            try:
+                self[name] = value
+
+            except KeyError:
+                pass  # Keep silent for a new option may appear anytime.
+
+    def parse(self):
+        """Parses configuration file items from one
+        or more related sections.
+
+        """
+        for section_name, section_options in self.sections.items():
+
+            method_postfix = ''
+            if section_name:  # [section.option] variant
+                method_postfix = '_%s' % section_name
+
+            section_parser_method = getattr(
+                self,
+                # Dots in section names are translated into dunderscores.
+                ('parse_section%s' % method_postfix).replace('.', '__'),
+                None)
+
+            if section_parser_method is None:
+                raise DistutilsOptionError(
+                    'Unsupported distribution option section: [%s.%s]' % (
+                        self.section_prefix, section_name))
+
+            section_parser_method(section_options)
+
+    def _deprecated_config_handler(self, func, msg, warning_class):
+        """ this function will wrap around parameters that are deprecated
+
+        :param msg: deprecation message
+        :param warning_class: class of warning exception to be raised
+        :param func: function to be wrapped around
+        """
+        @wraps(func)
+        def config_handler(*args, **kwargs):
+            warnings.warn(msg, warning_class)
+            return func(*args, **kwargs)
+
+        return config_handler
+
+
+class ConfigMetadataHandler(ConfigHandler):
+
+    section_prefix = 'metadata'
+
+    aliases = {
+        'home_page': 'url',
+        'summary': 'description',
+        'classifier': 'classifiers',
+        'platform': 'platforms',
+    }
+
+    strict_mode = False
+    """We need to keep it loose, to be partially compatible with
+    `pbr` and `d2to1` packages which also uses `metadata` section.
+
+    """
+
+    def __init__(self, target_obj, options, ignore_option_errors=False,
+                 package_dir=None):
+        super(ConfigMetadataHandler, self).__init__(target_obj, options,
+                                                    ignore_option_errors)
+        self.package_dir = package_dir
+
+    @property
+    def parsers(self):
+        """Metadata item name to parser function mapping."""
+        parse_list = self._parse_list
+        parse_file = self._parse_file
+        parse_dict = self._parse_dict
+        exclude_files_parser = self._exclude_files_parser
+
+        return {
+            'platforms': parse_list,
+            'keywords': parse_list,
+            'provides': parse_list,
+            'requires': self._deprecated_config_handler(
+                parse_list,
+                "The requires parameter is deprecated, please use "
+                "install_requires for runtime dependencies.",
+                DeprecationWarning),
+            'obsoletes': parse_list,
+            'classifiers': self._get_parser_compound(parse_file, parse_list),
+            'license': exclude_files_parser('license'),
+            'description': parse_file,
+            'long_description': parse_file,
+            'version': self._parse_version,
+            'project_urls': parse_dict,
+        }
+
+    def _parse_version(self, value):
+        """Parses `version` option value.
+
+        :param value:
+        :rtype: str
+
+        """
+        version = self._parse_file(value)
+
+        if version != value:
+            version = version.strip()
+            # Be strict about versions loaded from file because it's easy to
+            # accidentally include newlines and other unintended content
+            if isinstance(parse(version), LegacyVersion):
+                tmpl = (
+                    'Version loaded from {value} does not '
+                    'comply with PEP 440: {version}'
+                )
+                raise DistutilsOptionError(tmpl.format(**locals()))
+
+            return version
+
+        version = self._parse_attr(value, self.package_dir)
+
+        if callable(version):
+            version = version()
+
+        if not isinstance(version, string_types):
+            if hasattr(version, '__iter__'):
+                version = '.'.join(map(str, version))
+            else:
+                version = '%s' % version
+
+        return version
+
+
+class ConfigOptionsHandler(ConfigHandler):
+
+    section_prefix = 'options'
+
+    @property
+    def parsers(self):
+        """Metadata item name to parser function mapping."""
+        parse_list = self._parse_list
+        parse_list_semicolon = partial(self._parse_list, separator=';')
+        parse_bool = self._parse_bool
+        parse_dict = self._parse_dict
+
+        return {
+            'zip_safe': parse_bool,
+            'use_2to3': parse_bool,
+            'include_package_data': parse_bool,
+            'package_dir': parse_dict,
+            'use_2to3_fixers': parse_list,
+            'use_2to3_exclude_fixers': parse_list,
+            'convert_2to3_doctests': parse_list,
+            'scripts': parse_list,
+            'eager_resources': parse_list,
+            'dependency_links': parse_list,
+            'namespace_packages': parse_list,
+            'install_requires': parse_list_semicolon,
+            'setup_requires': parse_list_semicolon,
+            'tests_require': parse_list_semicolon,
+            'packages': self._parse_packages,
+            'entry_points': self._parse_file,
+            'py_modules': parse_list,
+            'python_requires': SpecifierSet,
+        }
+
+    def _parse_packages(self, value):
+        """Parses `packages` option value.
+
+        :param value:
+        :rtype: list
+        """
+        find_directives = ['find:', 'find_namespace:']
+        trimmed_value = value.strip()
+
+        if trimmed_value not in find_directives:
+            return self._parse_list(value)
+
+        findns = trimmed_value == find_directives[1]
+        if findns and not PY3:
+            raise DistutilsOptionError(
+                'find_namespace: directive is unsupported on Python < 3.3')
+
+        # Read function arguments from a dedicated section.
+        find_kwargs = self.parse_section_packages__find(
+            self.sections.get('packages.find', {}))
+
+        if findns:
+            from setuptools import find_namespace_packages as find_packages
+        else:
+            from setuptools import find_packages
+
+        return find_packages(**find_kwargs)
+
+    def parse_section_packages__find(self, section_options):
+        """Parses `packages.find` configuration file section.
+
+        To be used in conjunction with _parse_packages().
+
+        :param dict section_options:
+        """
+        section_data = self._parse_section_to_dict(
+            section_options, self._parse_list)
+
+        valid_keys = ['where', 'include', 'exclude']
+
+        find_kwargs = dict(
+            [(k, v) for k, v in section_data.items() if k in valid_keys and v])
+
+        where = find_kwargs.get('where')
+        if where is not None:
+            find_kwargs['where'] = where[0]  # cast list to single val
+
+        return find_kwargs
+
+    def parse_section_entry_points(self, section_options):
+        """Parses `entry_points` configuration file section.
+
+        :param dict section_options:
+        """
+        parsed = self._parse_section_to_dict(section_options, self._parse_list)
+        self['entry_points'] = parsed
+
+    def _parse_package_data(self, section_options):
+        parsed = self._parse_section_to_dict(section_options, self._parse_list)
+
+        root = parsed.get('*')
+        if root:
+            parsed[''] = root
+            del parsed['*']
+
+        return parsed
+
+    def parse_section_package_data(self, section_options):
+        """Parses `package_data` configuration file section.
+
+        :param dict section_options:
+        """
+        self['package_data'] = self._parse_package_data(section_options)
+
+    def parse_section_exclude_package_data(self, section_options):
+        """Parses `exclude_package_data` configuration file section.
+
+        :param dict section_options:
+        """
+        self['exclude_package_data'] = self._parse_package_data(
+            section_options)
+
+    def parse_section_extras_require(self, section_options):
+        """Parses `extras_require` configuration file section.
+
+        :param dict section_options:
+        """
+        parse_list = partial(self._parse_list, separator=';')
+        self['extras_require'] = self._parse_section_to_dict(
+            section_options, parse_list)
+
+    def parse_section_data_files(self, section_options):
+        """Parses `data_files` configuration file section.
+
+        :param dict section_options:
+        """
+        parsed = self._parse_section_to_dict(section_options, self._parse_list)
+        self['data_files'] = [(k, v) for k, v in parsed.items()]
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/dep_util.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/dep_util.py
new file mode 100644
index 0000000..2931c13
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/dep_util.py
@@ -0,0 +1,23 @@
+from distutils.dep_util import newer_group
+
+# yes, this is was almost entirely copy-pasted from
+# 'newer_pairwise()', this is just another convenience
+# function.
+def newer_pairwise_group(sources_groups, targets):
+    """Walk both arguments in parallel, testing if each source group is newer
+    than its corresponding target. Returns a pair of lists (sources_groups,
+    targets) where sources is newer than target, according to the semantics
+    of 'newer_group()'.
+    """
+    if len(sources_groups) != len(targets):
+        raise ValueError("'sources_group' and 'targets' must be the same length")
+
+    # build a pair of lists (sources_groups, targets) where source is newer
+    n_sources = []
+    n_targets = []
+    for i in range(len(sources_groups)):
+        if newer_group(sources_groups[i], targets[i]):
+            n_sources.append(sources_groups[i])
+            n_targets.append(targets[i])
+
+    return n_sources, n_targets
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/depends.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/depends.py
new file mode 100644
index 0000000..a37675c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/depends.py
@@ -0,0 +1,176 @@
+import sys
+import marshal
+import contextlib
+from distutils.version import StrictVersion
+
+from .py33compat import Bytecode
+
+from .py27compat import find_module, PY_COMPILED, PY_FROZEN, PY_SOURCE
+from . import py27compat
+
+
+__all__ = [
+    'Require', 'find_module', 'get_module_constant', 'extract_constant'
+]
+
+
+class Require:
+    """A prerequisite to building or installing a distribution"""
+
+    def __init__(
+            self, name, requested_version, module, homepage='',
+            attribute=None, format=None):
+
+        if format is None and requested_version is not None:
+            format = StrictVersion
+
+        if format is not None:
+            requested_version = format(requested_version)
+            if attribute is None:
+                attribute = '__version__'
+
+        self.__dict__.update(locals())
+        del self.self
+
+    def full_name(self):
+        """Return full package/distribution name, w/version"""
+        if self.requested_version is not None:
+            return '%s-%s' % (self.name, self.requested_version)
+        return self.name
+
+    def version_ok(self, version):
+        """Is 'version' sufficiently up-to-date?"""
+        return self.attribute is None or self.format is None or \
+            str(version) != "unknown" and version >= self.requested_version
+
+    def get_version(self, paths=None, default="unknown"):
+        """Get version number of installed module, 'None', or 'default'
+
+        Search 'paths' for module.  If not found, return 'None'.  If found,
+        return the extracted version attribute, or 'default' if no version
+        attribute was specified, or the value cannot be determined without
+        importing the module.  The version is formatted according to the
+        requirement's version format (if any), unless it is 'None' or the
+        supplied 'default'.
+        """
+
+        if self.attribute is None:
+            try:
+                f, p, i = find_module(self.module, paths)
+                if f:
+                    f.close()
+                return default
+            except ImportError:
+                return None
+
+        v = get_module_constant(self.module, self.attribute, default, paths)
+
+        if v is not None and v is not default and self.format is not None:
+            return self.format(v)
+
+        return v
+
+    def is_present(self, paths=None):
+        """Return true if dependency is present on 'paths'"""
+        return self.get_version(paths) is not None
+
+    def is_current(self, paths=None):
+        """Return true if dependency is present and up-to-date on 'paths'"""
+        version = self.get_version(paths)
+        if version is None:
+            return False
+        return self.version_ok(version)
+
+
+def maybe_close(f):
+    @contextlib.contextmanager
+    def empty():
+        yield
+        return
+    if not f:
+        return empty()
+
+    return contextlib.closing(f)
+
+
+def get_module_constant(module, symbol, default=-1, paths=None):
+    """Find 'module' by searching 'paths', and extract 'symbol'
+
+    Return 'None' if 'module' does not exist on 'paths', or it does not define
+    'symbol'.  If the module defines 'symbol' as a constant, return the
+    constant.  Otherwise, return 'default'."""
+
+    try:
+        f, path, (suffix, mode, kind) = info = find_module(module, paths)
+    except ImportError:
+        # Module doesn't exist
+        return None
+
+    with maybe_close(f):
+        if kind == PY_COMPILED:
+            f.read(8)  # skip magic & date
+            code = marshal.load(f)
+        elif kind == PY_FROZEN:
+            code = py27compat.get_frozen_object(module, paths)
+        elif kind == PY_SOURCE:
+            code = compile(f.read(), path, 'exec')
+        else:
+            # Not something we can parse; we'll have to import it.  :(
+            imported = py27compat.get_module(module, paths, info)
+            return getattr(imported, symbol, None)
+
+    return extract_constant(code, symbol, default)
+
+
+def extract_constant(code, symbol, default=-1):
+    """Extract the constant value of 'symbol' from 'code'
+
+    If the name 'symbol' is bound to a constant value by the Python code
+    object 'code', return that value.  If 'symbol' is bound to an expression,
+    return 'default'.  Otherwise, return 'None'.
+
+    Return value is based on the first assignment to 'symbol'.  'symbol' must
+    be a global, or at least a non-"fast" local in the code block.  That is,
+    only 'STORE_NAME' and 'STORE_GLOBAL' opcodes are checked, and 'symbol'
+    must be present in 'code.co_names'.
+    """
+    if symbol not in code.co_names:
+        # name's not there, can't possibly be an assignment
+        return None
+
+    name_idx = list(code.co_names).index(symbol)
+
+    STORE_NAME = 90
+    STORE_GLOBAL = 97
+    LOAD_CONST = 100
+
+    const = default
+
+    for byte_code in Bytecode(code):
+        op = byte_code.opcode
+        arg = byte_code.arg
+
+        if op == LOAD_CONST:
+            const = code.co_consts[arg]
+        elif arg == name_idx and (op == STORE_NAME or op == STORE_GLOBAL):
+            return const
+        else:
+            const = default
+
+
+def _update_globals():
+    """
+    Patch the globals to remove the objects not available on some platforms.
+
+    XXX it'd be better to test assertions about bytecode instead.
+    """
+
+    if not sys.platform.startswith('java') and sys.platform != 'cli':
+        return
+    incompatible = 'extract_constant', 'get_module_constant'
+    for name in incompatible:
+        del globals()[name]
+        __all__.remove(name)
+
+
+_update_globals()
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/dist.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/dist.py
new file mode 100644
index 0000000..2e5ad4b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/dist.py
@@ -0,0 +1,1281 @@
+# -*- coding: utf-8 -*-
+__all__ = ['Distribution']
+
+import io
+import sys
+import re
+import os
+import warnings
+import numbers
+import distutils.log
+import distutils.core
+import distutils.cmd
+import distutils.dist
+from distutils.util import strtobool
+from distutils.debug import DEBUG
+from distutils.fancy_getopt import translate_longopt
+import itertools
+
+from collections import defaultdict
+from email import message_from_file
+
+from distutils.errors import (
+    DistutilsOptionError, DistutilsPlatformError, DistutilsSetupError,
+)
+from distutils.util import rfc822_escape
+from distutils.version import StrictVersion
+
+from setuptools.extern import six
+from setuptools.extern import packaging
+from setuptools.extern import ordered_set
+from setuptools.extern.six.moves import map, filter, filterfalse
+
+from . import SetuptoolsDeprecationWarning
+
+from setuptools.depends import Require
+from setuptools import windows_support
+from setuptools.monkey import get_unpatched
+from setuptools.config import parse_configuration
+import pkg_resources
+
+__import__('setuptools.extern.packaging.specifiers')
+__import__('setuptools.extern.packaging.version')
+
+
+def _get_unpatched(cls):
+    warnings.warn("Do not call this function", DistDeprecationWarning)
+    return get_unpatched(cls)
+
+
+def get_metadata_version(self):
+    mv = getattr(self, 'metadata_version', None)
+
+    if mv is None:
+        if self.long_description_content_type or self.provides_extras:
+            mv = StrictVersion('2.1')
+        elif (self.maintainer is not None or
+              self.maintainer_email is not None or
+              getattr(self, 'python_requires', None) is not None or
+              self.project_urls):
+            mv = StrictVersion('1.2')
+        elif (self.provides or self.requires or self.obsoletes or
+                self.classifiers or self.download_url):
+            mv = StrictVersion('1.1')
+        else:
+            mv = StrictVersion('1.0')
+
+        self.metadata_version = mv
+
+    return mv
+
+
+def read_pkg_file(self, file):
+    """Reads the metadata values from a file object."""
+    msg = message_from_file(file)
+
+    def _read_field(name):
+        value = msg[name]
+        if value == 'UNKNOWN':
+            return None
+        return value
+
+    def _read_list(name):
+        values = msg.get_all(name, None)
+        if values == []:
+            return None
+        return values
+
+    self.metadata_version = StrictVersion(msg['metadata-version'])
+    self.name = _read_field('name')
+    self.version = _read_field('version')
+    self.description = _read_field('summary')
+    # we are filling author only.
+    self.author = _read_field('author')
+    self.maintainer = None
+    self.author_email = _read_field('author-email')
+    self.maintainer_email = None
+    self.url = _read_field('home-page')
+    self.license = _read_field('license')
+
+    if 'download-url' in msg:
+        self.download_url = _read_field('download-url')
+    else:
+        self.download_url = None
+
+    self.long_description = _read_field('description')
+    self.description = _read_field('summary')
+
+    if 'keywords' in msg:
+        self.keywords = _read_field('keywords').split(',')
+
+    self.platforms = _read_list('platform')
+    self.classifiers = _read_list('classifier')
+
+    # PEP 314 - these fields only exist in 1.1
+    if self.metadata_version == StrictVersion('1.1'):
+        self.requires = _read_list('requires')
+        self.provides = _read_list('provides')
+        self.obsoletes = _read_list('obsoletes')
+    else:
+        self.requires = None
+        self.provides = None
+        self.obsoletes = None
+
+
+# Based on Python 3.5 version
+def write_pkg_file(self, file):
+    """Write the PKG-INFO format data to a file object.
+    """
+    version = self.get_metadata_version()
+
+    if six.PY2:
+        def write_field(key, value):
+            file.write("%s: %s\n" % (key, self._encode_field(value)))
+    else:
+        def write_field(key, value):
+            file.write("%s: %s\n" % (key, value))
+
+    write_field('Metadata-Version', str(version))
+    write_field('Name', self.get_name())
+    write_field('Version', self.get_version())
+    write_field('Summary', self.get_description())
+    write_field('Home-page', self.get_url())
+
+    if version < StrictVersion('1.2'):
+        write_field('Author', self.get_contact())
+        write_field('Author-email', self.get_contact_email())
+    else:
+        optional_fields = (
+            ('Author', 'author'),
+            ('Author-email', 'author_email'),
+            ('Maintainer', 'maintainer'),
+            ('Maintainer-email', 'maintainer_email'),
+        )
+
+        for field, attr in optional_fields:
+            attr_val = getattr(self, attr)
+
+            if attr_val is not None:
+                write_field(field, attr_val)
+
+    write_field('License', self.get_license())
+    if self.download_url:
+        write_field('Download-URL', self.download_url)
+    for project_url in self.project_urls.items():
+        write_field('Project-URL',  '%s, %s' % project_url)
+
+    long_desc = rfc822_escape(self.get_long_description())
+    write_field('Description', long_desc)
+
+    keywords = ','.join(self.get_keywords())
+    if keywords:
+        write_field('Keywords', keywords)
+
+    if version >= StrictVersion('1.2'):
+        for platform in self.get_platforms():
+            write_field('Platform', platform)
+    else:
+        self._write_list(file, 'Platform', self.get_platforms())
+
+    self._write_list(file, 'Classifier', self.get_classifiers())
+
+    # PEP 314
+    self._write_list(file, 'Requires', self.get_requires())
+    self._write_list(file, 'Provides', self.get_provides())
+    self._write_list(file, 'Obsoletes', self.get_obsoletes())
+
+    # Setuptools specific for PEP 345
+    if hasattr(self, 'python_requires'):
+        write_field('Requires-Python', self.python_requires)
+
+    # PEP 566
+    if self.long_description_content_type:
+        write_field(
+            'Description-Content-Type',
+            self.long_description_content_type
+        )
+    if self.provides_extras:
+        for extra in self.provides_extras:
+            write_field('Provides-Extra', extra)
+
+
+sequence = tuple, list
+
+
+def check_importable(dist, attr, value):
+    try:
+        ep = pkg_resources.EntryPoint.parse('x=' + value)
+        assert not ep.extras
+    except (TypeError, ValueError, AttributeError, AssertionError):
+        raise DistutilsSetupError(
+            "%r must be importable 'module:attrs' string (got %r)"
+            % (attr, value)
+        )
+
+
+def assert_string_list(dist, attr, value):
+    """Verify that value is a string list"""
+    try:
+        # verify that value is a list or tuple to exclude unordered
+        # or single-use iterables
+        assert isinstance(value, (list, tuple))
+        # verify that elements of value are strings
+        assert ''.join(value) != value
+    except (TypeError, ValueError, AttributeError, AssertionError):
+        raise DistutilsSetupError(
+            "%r must be a list of strings (got %r)" % (attr, value)
+        )
+
+
+def check_nsp(dist, attr, value):
+    """Verify that namespace packages are valid"""
+    ns_packages = value
+    assert_string_list(dist, attr, ns_packages)
+    for nsp in ns_packages:
+        if not dist.has_contents_for(nsp):
+            raise DistutilsSetupError(
+                "Distribution contains no modules or packages for " +
+                "namespace package %r" % nsp
+            )
+        parent, sep, child = nsp.rpartition('.')
+        if parent and parent not in ns_packages:
+            distutils.log.warn(
+                "WARNING: %r is declared as a package namespace, but %r"
+                " is not: please correct this in setup.py", nsp, parent
+            )
+
+
+def check_extras(dist, attr, value):
+    """Verify that extras_require mapping is valid"""
+    try:
+        list(itertools.starmap(_check_extra, value.items()))
+    except (TypeError, ValueError, AttributeError):
+        raise DistutilsSetupError(
+            "'extras_require' must be a dictionary whose values are "
+            "strings or lists of strings containing valid project/version "
+            "requirement specifiers."
+        )
+
+
+def _check_extra(extra, reqs):
+    name, sep, marker = extra.partition(':')
+    if marker and pkg_resources.invalid_marker(marker):
+        raise DistutilsSetupError("Invalid environment marker: " + marker)
+    list(pkg_resources.parse_requirements(reqs))
+
+
+def assert_bool(dist, attr, value):
+    """Verify that value is True, False, 0, or 1"""
+    if bool(value) != value:
+        tmpl = "{attr!r} must be a boolean value (got {value!r})"
+        raise DistutilsSetupError(tmpl.format(attr=attr, value=value))
+
+
+def check_requirements(dist, attr, value):
+    """Verify that install_requires is a valid requirements list"""
+    try:
+        list(pkg_resources.parse_requirements(value))
+        if isinstance(value, (dict, set)):
+            raise TypeError("Unordered types are not allowed")
+    except (TypeError, ValueError) as error:
+        tmpl = (
+            "{attr!r} must be a string or list of strings "
+            "containing valid project/version requirement specifiers; {error}"
+        )
+        raise DistutilsSetupError(tmpl.format(attr=attr, error=error))
+
+
+def check_specifier(dist, attr, value):
+    """Verify that value is a valid version specifier"""
+    try:
+        packaging.specifiers.SpecifierSet(value)
+    except packaging.specifiers.InvalidSpecifier as error:
+        tmpl = (
+            "{attr!r} must be a string "
+            "containing valid version specifiers; {error}"
+        )
+        raise DistutilsSetupError(tmpl.format(attr=attr, error=error))
+
+
+def check_entry_points(dist, attr, value):
+    """Verify that entry_points map is parseable"""
+    try:
+        pkg_resources.EntryPoint.parse_map(value)
+    except ValueError as e:
+        raise DistutilsSetupError(e)
+
+
+def check_test_suite(dist, attr, value):
+    if not isinstance(value, six.string_types):
+        raise DistutilsSetupError("test_suite must be a string")
+
+
+def check_package_data(dist, attr, value):
+    """Verify that value is a dictionary of package names to glob lists"""
+    if not isinstance(value, dict):
+        raise DistutilsSetupError(
+            "{!r} must be a dictionary mapping package names to lists of "
+            "string wildcard patterns".format(attr))
+    for k, v in value.items():
+        if not isinstance(k, six.string_types):
+            raise DistutilsSetupError(
+                "keys of {!r} dict must be strings (got {!r})"
+                .format(attr, k)
+            )
+        assert_string_list(dist, 'values of {!r} dict'.format(attr), v)
+
+
+def check_packages(dist, attr, value):
+    for pkgname in value:
+        if not re.match(r'\w+(\.\w+)*', pkgname):
+            distutils.log.warn(
+                "WARNING: %r not a valid package name; please use only "
+                ".-separated package names in setup.py", pkgname
+            )
+
+
+_Distribution = get_unpatched(distutils.core.Distribution)
+
+
+class Distribution(_Distribution):
+    """Distribution with support for features, tests, and package data
+
+    This is an enhanced version of 'distutils.dist.Distribution' that
+    effectively adds the following new optional keyword arguments to 'setup()':
+
+     'install_requires' -- a string or sequence of strings specifying project
+        versions that the distribution requires when installed, in the format
+        used by 'pkg_resources.require()'.  They will be installed
+        automatically when the package is installed.  If you wish to use
+        packages that are not available in PyPI, or want to give your users an
+        alternate download location, you can add a 'find_links' option to the
+        '[easy_install]' section of your project's 'setup.cfg' file, and then
+        setuptools will scan the listed web pages for links that satisfy the
+        requirements.
+
+     'extras_require' -- a dictionary mapping names of optional "extras" to the
+        additional requirement(s) that using those extras incurs. For example,
+        this::
+
+            extras_require = dict(reST = ["docutils>=0.3", "reSTedit"])
+
+        indicates that the distribution can optionally provide an extra
+        capability called "reST", but it can only be used if docutils and
+        reSTedit are installed.  If the user installs your package using
+        EasyInstall and requests one of your extras, the corresponding
+        additional requirements will be installed if needed.
+
+     'features' **deprecated** -- a dictionary mapping option names to
+        'setuptools.Feature'
+        objects.  Features are a portion of the distribution that can be
+        included or excluded based on user options, inter-feature dependencies,
+        and availability on the current system.  Excluded features are omitted
+        from all setup commands, including source and binary distributions, so
+        you can create multiple distributions from the same source tree.
+        Feature names should be valid Python identifiers, except that they may
+        contain the '-' (minus) sign.  Features can be included or excluded
+        via the command line options '--with-X' and '--without-X', where 'X' is
+        the name of the feature.  Whether a feature is included by default, and
+        whether you are allowed to control this from the command line, is
+        determined by the Feature object.  See the 'Feature' class for more
+        information.
+
+     'test_suite' -- the name of a test suite to run for the 'test' command.
+        If the user runs 'python setup.py test', the package will be installed,
+        and the named test suite will be run.  The format is the same as
+        would be used on a 'unittest.py' command line.  That is, it is the
+        dotted name of an object to import and call to generate a test suite.
+
+     'package_data' -- a dictionary mapping package names to lists of filenames
+        or globs to use to find data files contained in the named packages.
+        If the dictionary has filenames or globs listed under '""' (the empty
+        string), those names will be searched for in every package, in addition
+        to any names for the specific package.  Data files found using these
+        names/globs will be installed along with the package, in the same
+        location as the package.  Note that globs are allowed to reference
+        the contents of non-package subdirectories, as long as you use '/' as
+        a path separator.  (Globs are automatically converted to
+        platform-specific paths at runtime.)
+
+    In addition to these new keywords, this class also has several new methods
+    for manipulating the distribution's contents.  For example, the 'include()'
+    and 'exclude()' methods can be thought of as in-place add and subtract
+    commands that add or remove packages, modules, extensions, and so on from
+    the distribution.  They are used by the feature subsystem to configure the
+    distribution for the included and excluded features.
+    """
+
+    _DISTUTILS_UNSUPPORTED_METADATA = {
+        'long_description_content_type': None,
+        'project_urls': dict,
+        'provides_extras': ordered_set.OrderedSet,
+    }
+
+    _patched_dist = None
+
+    def patch_missing_pkg_info(self, attrs):
+        # Fake up a replacement for the data that would normally come from
+        # PKG-INFO, but which might not yet be built if this is a fresh
+        # checkout.
+        #
+        if not attrs or 'name' not in attrs or 'version' not in attrs:
+            return
+        key = pkg_resources.safe_name(str(attrs['name'])).lower()
+        dist = pkg_resources.working_set.by_key.get(key)
+        if dist is not None and not dist.has_metadata('PKG-INFO'):
+            dist._version = pkg_resources.safe_version(str(attrs['version']))
+            self._patched_dist = dist
+
+    def __init__(self, attrs=None):
+        have_package_data = hasattr(self, "package_data")
+        if not have_package_data:
+            self.package_data = {}
+        attrs = attrs or {}
+        if 'features' in attrs or 'require_features' in attrs:
+            Feature.warn_deprecated()
+        self.require_features = []
+        self.features = {}
+        self.dist_files = []
+        # Filter-out setuptools' specific options.
+        self.src_root = attrs.pop("src_root", None)
+        self.patch_missing_pkg_info(attrs)
+        self.dependency_links = attrs.pop('dependency_links', [])
+        self.setup_requires = attrs.pop('setup_requires', [])
+        for ep in pkg_resources.iter_entry_points('distutils.setup_keywords'):
+            vars(self).setdefault(ep.name, None)
+        _Distribution.__init__(self, {
+            k: v for k, v in attrs.items()
+            if k not in self._DISTUTILS_UNSUPPORTED_METADATA
+        })
+
+        # Fill-in missing metadata fields not supported by distutils.
+        # Note some fields may have been set by other tools (e.g. pbr)
+        # above; they are taken preferrentially to setup() arguments
+        for option, default in self._DISTUTILS_UNSUPPORTED_METADATA.items():
+            for source in self.metadata.__dict__, attrs:
+                if option in source:
+                    value = source[option]
+                    break
+            else:
+                value = default() if default else None
+            setattr(self.metadata, option, value)
+
+        if isinstance(self.metadata.version, numbers.Number):
+            # Some people apparently take "version number" too literally :)
+            self.metadata.version = str(self.metadata.version)
+
+        if self.metadata.version is not None:
+            try:
+                ver = packaging.version.Version(self.metadata.version)
+                normalized_version = str(ver)
+                if self.metadata.version != normalized_version:
+                    warnings.warn(
+                        "Normalizing '%s' to '%s'" % (
+                            self.metadata.version,
+                            normalized_version,
+                        )
+                    )
+                    self.metadata.version = normalized_version
+            except (packaging.version.InvalidVersion, TypeError):
+                warnings.warn(
+                    "The version specified (%r) is an invalid version, this "
+                    "may not work as expected with newer versions of "
+                    "setuptools, pip, and PyPI. Please see PEP 440 for more "
+                    "details." % self.metadata.version
+                )
+        self._finalize_requires()
+
+    def _finalize_requires(self):
+        """
+        Set `metadata.python_requires` and fix environment markers
+        in `install_requires` and `extras_require`.
+        """
+        if getattr(self, 'python_requires', None):
+            self.metadata.python_requires = self.python_requires
+
+        if getattr(self, 'extras_require', None):
+            for extra in self.extras_require.keys():
+                # Since this gets called multiple times at points where the
+                # keys have become 'converted' extras, ensure that we are only
+                # truly adding extras we haven't seen before here.
+                extra = extra.split(':')[0]
+                if extra:
+                    self.metadata.provides_extras.add(extra)
+
+        self._convert_extras_requirements()
+        self._move_install_requirements_markers()
+
+    def _convert_extras_requirements(self):
+        """
+        Convert requirements in `extras_require` of the form
+        `"extra": ["barbazquux; {marker}"]` to
+        `"extra:{marker}": ["barbazquux"]`.
+        """
+        spec_ext_reqs = getattr(self, 'extras_require', None) or {}
+        self._tmp_extras_require = defaultdict(list)
+        for section, v in spec_ext_reqs.items():
+            # Do not strip empty sections.
+            self._tmp_extras_require[section]
+            for r in pkg_resources.parse_requirements(v):
+                suffix = self._suffix_for(r)
+                self._tmp_extras_require[section + suffix].append(r)
+
+    @staticmethod
+    def _suffix_for(req):
+        """
+        For a requirement, return the 'extras_require' suffix for
+        that requirement.
+        """
+        return ':' + str(req.marker) if req.marker else ''
+
+    def _move_install_requirements_markers(self):
+        """
+        Move requirements in `install_requires` that are using environment
+        markers `extras_require`.
+        """
+
+        # divide the install_requires into two sets, simple ones still
+        # handled by install_requires and more complex ones handled
+        # by extras_require.
+
+        def is_simple_req(req):
+            return not req.marker
+
+        spec_inst_reqs = getattr(self, 'install_requires', None) or ()
+        inst_reqs = list(pkg_resources.parse_requirements(spec_inst_reqs))
+        simple_reqs = filter(is_simple_req, inst_reqs)
+        complex_reqs = filterfalse(is_simple_req, inst_reqs)
+        self.install_requires = list(map(str, simple_reqs))
+
+        for r in complex_reqs:
+            self._tmp_extras_require[':' + str(r.marker)].append(r)
+        self.extras_require = dict(
+            (k, [str(r) for r in map(self._clean_req, v)])
+            for k, v in self._tmp_extras_require.items()
+        )
+
+    def _clean_req(self, req):
+        """
+        Given a Requirement, remove environment markers and return it.
+        """
+        req.marker = None
+        return req
+
+    def _parse_config_files(self, filenames=None):
+        """
+        Adapted from distutils.dist.Distribution.parse_config_files,
+        this method provides the same functionality in subtly-improved
+        ways.
+        """
+        from setuptools.extern.six.moves.configparser import ConfigParser
+
+        # Ignore install directory options if we have a venv
+        if six.PY3 and sys.prefix != sys.base_prefix:
+            ignore_options = [
+                'install-base', 'install-platbase', 'install-lib',
+                'install-platlib', 'install-purelib', 'install-headers',
+                'install-scripts', 'install-data', 'prefix', 'exec-prefix',
+                'home', 'user', 'root']
+        else:
+            ignore_options = []
+
+        ignore_options = frozenset(ignore_options)
+
+        if filenames is None:
+            filenames = self.find_config_files()
+
+        if DEBUG:
+            self.announce("Distribution.parse_config_files():")
+
+        parser = ConfigParser()
+        for filename in filenames:
+            with io.open(filename, encoding='utf-8') as reader:
+                if DEBUG:
+                    self.announce("  reading {filename}".format(**locals()))
+                (parser.read_file if six.PY3 else parser.readfp)(reader)
+            for section in parser.sections():
+                options = parser.options(section)
+                opt_dict = self.get_option_dict(section)
+
+                for opt in options:
+                    if opt != '__name__' and opt not in ignore_options:
+                        val = self._try_str(parser.get(section, opt))
+                        opt = opt.replace('-', '_')
+                        opt_dict[opt] = (filename, val)
+
+            # Make the ConfigParser forget everything (so we retain
+            # the original filenames that options come from)
+            parser.__init__()
+
+        # If there was a "global" section in the config file, use it
+        # to set Distribution options.
+
+        if 'global' in self.command_options:
+            for (opt, (src, val)) in self.command_options['global'].items():
+                alias = self.negative_opt.get(opt)
+                try:
+                    if alias:
+                        setattr(self, alias, not strtobool(val))
+                    elif opt in ('verbose', 'dry_run'):  # ugh!
+                        setattr(self, opt, strtobool(val))
+                    else:
+                        setattr(self, opt, val)
+                except ValueError as msg:
+                    raise DistutilsOptionError(msg)
+
+    @staticmethod
+    def _try_str(val):
+        """
+        On Python 2, much of distutils relies on string values being of
+        type 'str' (bytes) and not unicode text. If the value can be safely
+        encoded to bytes using the default encoding, prefer that.
+
+        Why the default encoding? Because that value can be implicitly
+        decoded back to text if needed.
+
+        Ref #1653
+        """
+        if six.PY3:
+            return val
+        try:
+            return val.encode()
+        except UnicodeEncodeError:
+            pass
+        return val
+
+    def _set_command_options(self, command_obj, option_dict=None):
+        """
+        Set the options for 'command_obj' from 'option_dict'.  Basically
+        this means copying elements of a dictionary ('option_dict') to
+        attributes of an instance ('command').
+
+        'command_obj' must be a Command instance.  If 'option_dict' is not
+        supplied, uses the standard option dictionary for this command
+        (from 'self.command_options').
+
+        (Adopted from distutils.dist.Distribution._set_command_options)
+        """
+        command_name = command_obj.get_command_name()
+        if option_dict is None:
+            option_dict = self.get_option_dict(command_name)
+
+        if DEBUG:
+            self.announce("  setting options for '%s' command:" % command_name)
+        for (option, (source, value)) in option_dict.items():
+            if DEBUG:
+                self.announce("    %s = %s (from %s)" % (option, value,
+                                                         source))
+            try:
+                bool_opts = [translate_longopt(o)
+                             for o in command_obj.boolean_options]
+            except AttributeError:
+                bool_opts = []
+            try:
+                neg_opt = command_obj.negative_opt
+            except AttributeError:
+                neg_opt = {}
+
+            try:
+                is_string = isinstance(value, six.string_types)
+                if option in neg_opt and is_string:
+                    setattr(command_obj, neg_opt[option], not strtobool(value))
+                elif option in bool_opts and is_string:
+                    setattr(command_obj, option, strtobool(value))
+                elif hasattr(command_obj, option):
+                    setattr(command_obj, option, value)
+                else:
+                    raise DistutilsOptionError(
+                        "error in %s: command '%s' has no such option '%s'"
+                        % (source, command_name, option))
+            except ValueError as msg:
+                raise DistutilsOptionError(msg)
+
+    def parse_config_files(self, filenames=None, ignore_option_errors=False):
+        """Parses configuration files from various levels
+        and loads configuration.
+
+        """
+        self._parse_config_files(filenames=filenames)
+
+        parse_configuration(self, self.command_options,
+                            ignore_option_errors=ignore_option_errors)
+        self._finalize_requires()
+
+    def parse_command_line(self):
+        """Process features after parsing command line options"""
+        result = _Distribution.parse_command_line(self)
+        if self.features:
+            self._finalize_features()
+        return result
+
+    def _feature_attrname(self, name):
+        """Convert feature name to corresponding option attribute name"""
+        return 'with_' + name.replace('-', '_')
+
+    def fetch_build_eggs(self, requires):
+        """Resolve pre-setup requirements"""
+        resolved_dists = pkg_resources.working_set.resolve(
+            pkg_resources.parse_requirements(requires),
+            installer=self.fetch_build_egg,
+            replace_conflicting=True,
+        )
+        for dist in resolved_dists:
+            pkg_resources.working_set.add(dist, replace=True)
+        return resolved_dists
+
+    def finalize_options(self):
+        _Distribution.finalize_options(self)
+        if self.features:
+            self._set_global_opts_from_features()
+
+        for ep in pkg_resources.iter_entry_points('distutils.setup_keywords'):
+            value = getattr(self, ep.name, None)
+            if value is not None:
+                ep.require(installer=self.fetch_build_egg)
+                ep.load()(self, ep.name, value)
+        if getattr(self, 'convert_2to3_doctests', None):
+            # XXX may convert to set here when we can rely on set being builtin
+            self.convert_2to3_doctests = [
+                os.path.abspath(p)
+                for p in self.convert_2to3_doctests
+            ]
+        else:
+            self.convert_2to3_doctests = []
+
+    def get_egg_cache_dir(self):
+        egg_cache_dir = os.path.join(os.curdir, '.eggs')
+        if not os.path.exists(egg_cache_dir):
+            os.mkdir(egg_cache_dir)
+            windows_support.hide_file(egg_cache_dir)
+            readme_txt_filename = os.path.join(egg_cache_dir, 'README.txt')
+            with open(readme_txt_filename, 'w') as f:
+                f.write('This directory contains eggs that were downloaded '
+                        'by setuptools to build, test, and run plug-ins.\n\n')
+                f.write('This directory caches those eggs to prevent '
+                        'repeated downloads.\n\n')
+                f.write('However, it is safe to delete this directory.\n\n')
+
+        return egg_cache_dir
+
+    def fetch_build_egg(self, req):
+        """Fetch an egg needed for building"""
+        from setuptools.command.easy_install import easy_install
+        dist = self.__class__({'script_args': ['easy_install']})
+        opts = dist.get_option_dict('easy_install')
+        opts.clear()
+        opts.update(
+            (k, v)
+            for k, v in self.get_option_dict('easy_install').items()
+            if k in (
+                # don't use any other settings
+                'find_links', 'site_dirs', 'index_url',
+                'optimize', 'site_dirs', 'allow_hosts',
+            ))
+        if self.dependency_links:
+            links = self.dependency_links[:]
+            if 'find_links' in opts:
+                links = opts['find_links'][1] + links
+            opts['find_links'] = ('setup', links)
+        install_dir = self.get_egg_cache_dir()
+        cmd = easy_install(
+            dist, args=["x"], install_dir=install_dir,
+            exclude_scripts=True,
+            always_copy=False, build_directory=None, editable=False,
+            upgrade=False, multi_version=True, no_report=True, user=False
+        )
+        cmd.ensure_finalized()
+        return cmd.easy_install(req)
+
+    def _set_global_opts_from_features(self):
+        """Add --with-X/--without-X options based on optional features"""
+
+        go = []
+        no = self.negative_opt.copy()
+
+        for name, feature in self.features.items():
+            self._set_feature(name, None)
+            feature.validate(self)
+
+            if feature.optional:
+                descr = feature.description
+                incdef = ' (default)'
+                excdef = ''
+                if not feature.include_by_default():
+                    excdef, incdef = incdef, excdef
+
+                new = (
+                    ('with-' + name, None, 'include ' + descr + incdef),
+                    ('without-' + name, None, 'exclude ' + descr + excdef),
+                )
+                go.extend(new)
+                no['without-' + name] = 'with-' + name
+
+        self.global_options = self.feature_options = go + self.global_options
+        self.negative_opt = self.feature_negopt = no
+
+    def _finalize_features(self):
+        """Add/remove features and resolve dependencies between them"""
+
+        # First, flag all the enabled items (and thus their dependencies)
+        for name, feature in self.features.items():
+            enabled = self.feature_is_included(name)
+            if enabled or (enabled is None and feature.include_by_default()):
+                feature.include_in(self)
+                self._set_feature(name, 1)
+
+        # Then disable the rest, so that off-by-default features don't
+        # get flagged as errors when they're required by an enabled feature
+        for name, feature in self.features.items():
+            if not self.feature_is_included(name):
+                feature.exclude_from(self)
+                self._set_feature(name, 0)
+
+    def get_command_class(self, command):
+        """Pluggable version of get_command_class()"""
+        if command in self.cmdclass:
+            return self.cmdclass[command]
+
+        eps = pkg_resources.iter_entry_points('distutils.commands', command)
+        for ep in eps:
+            ep.require(installer=self.fetch_build_egg)
+            self.cmdclass[command] = cmdclass = ep.load()
+            return cmdclass
+        else:
+            return _Distribution.get_command_class(self, command)
+
+    def print_commands(self):
+        for ep in pkg_resources.iter_entry_points('distutils.commands'):
+            if ep.name not in self.cmdclass:
+                # don't require extras as the commands won't be invoked
+                cmdclass = ep.resolve()
+                self.cmdclass[ep.name] = cmdclass
+        return _Distribution.print_commands(self)
+
+    def get_command_list(self):
+        for ep in pkg_resources.iter_entry_points('distutils.commands'):
+            if ep.name not in self.cmdclass:
+                # don't require extras as the commands won't be invoked
+                cmdclass = ep.resolve()
+                self.cmdclass[ep.name] = cmdclass
+        return _Distribution.get_command_list(self)
+
+    def _set_feature(self, name, status):
+        """Set feature's inclusion status"""
+        setattr(self, self._feature_attrname(name), status)
+
+    def feature_is_included(self, name):
+        """Return 1 if feature is included, 0 if excluded, 'None' if unknown"""
+        return getattr(self, self._feature_attrname(name))
+
+    def include_feature(self, name):
+        """Request inclusion of feature named 'name'"""
+
+        if self.feature_is_included(name) == 0:
+            descr = self.features[name].description
+            raise DistutilsOptionError(
+                descr + " is required, but was excluded or is not available"
+            )
+        self.features[name].include_in(self)
+        self._set_feature(name, 1)
+
+    def include(self, **attrs):
+        """Add items to distribution that are named in keyword arguments
+
+        For example, 'dist.include(py_modules=["x"])' would add 'x' to
+        the distribution's 'py_modules' attribute, if it was not already
+        there.
+
+        Currently, this method only supports inclusion for attributes that are
+        lists or tuples.  If you need to add support for adding to other
+        attributes in this or a subclass, you can add an '_include_X' method,
+        where 'X' is the name of the attribute.  The method will be called with
+        the value passed to 'include()'.  So, 'dist.include(foo={"bar":"baz"})'
+        will try to call 'dist._include_foo({"bar":"baz"})', which can then
+        handle whatever special inclusion logic is needed.
+        """
+        for k, v in attrs.items():
+            include = getattr(self, '_include_' + k, None)
+            if include:
+                include(v)
+            else:
+                self._include_misc(k, v)
+
+    def exclude_package(self, package):
+        """Remove packages, modules, and extensions in named package"""
+
+        pfx = package + '.'
+        if self.packages:
+            self.packages = [
+                p for p in self.packages
+                if p != package and not p.startswith(pfx)
+            ]
+
+        if self.py_modules:
+            self.py_modules = [
+                p for p in self.py_modules
+                if p != package and not p.startswith(pfx)
+            ]
+
+        if self.ext_modules:
+            self.ext_modules = [
+                p for p in self.ext_modules
+                if p.name != package and not p.name.startswith(pfx)
+            ]
+
+    def has_contents_for(self, package):
+        """Return true if 'exclude_package(package)' would do something"""
+
+        pfx = package + '.'
+
+        for p in self.iter_distribution_names():
+            if p == package or p.startswith(pfx):
+                return True
+
+    def _exclude_misc(self, name, value):
+        """Handle 'exclude()' for list/tuple attrs without a special handler"""
+        if not isinstance(value, sequence):
+            raise DistutilsSetupError(
+                "%s: setting must be a list or tuple (%r)" % (name, value)
+            )
+        try:
+            old = getattr(self, name)
+        except AttributeError:
+            raise DistutilsSetupError(
+                "%s: No such distribution setting" % name
+            )
+        if old is not None and not isinstance(old, sequence):
+            raise DistutilsSetupError(
+                name + ": this setting cannot be changed via include/exclude"
+            )
+        elif old:
+            setattr(self, name, [item for item in old if item not in value])
+
+    def _include_misc(self, name, value):
+        """Handle 'include()' for list/tuple attrs without a special handler"""
+
+        if not isinstance(value, sequence):
+            raise DistutilsSetupError(
+                "%s: setting must be a list (%r)" % (name, value)
+            )
+        try:
+            old = getattr(self, name)
+        except AttributeError:
+            raise DistutilsSetupError(
+                "%s: No such distribution setting" % name
+            )
+        if old is None:
+            setattr(self, name, value)
+        elif not isinstance(old, sequence):
+            raise DistutilsSetupError(
+                name + ": this setting cannot be changed via include/exclude"
+            )
+        else:
+            new = [item for item in value if item not in old]
+            setattr(self, name, old + new)
+
+    def exclude(self, **attrs):
+        """Remove items from distribution that are named in keyword arguments
+
+        For example, 'dist.exclude(py_modules=["x"])' would remove 'x' from
+        the distribution's 'py_modules' attribute.  Excluding packages uses
+        the 'exclude_package()' method, so all of the package's contained
+        packages, modules, and extensions are also excluded.
+
+        Currently, this method only supports exclusion from attributes that are
+        lists or tuples.  If you need to add support for excluding from other
+        attributes in this or a subclass, you can add an '_exclude_X' method,
+        where 'X' is the name of the attribute.  The method will be called with
+        the value passed to 'exclude()'.  So, 'dist.exclude(foo={"bar":"baz"})'
+        will try to call 'dist._exclude_foo({"bar":"baz"})', which can then
+        handle whatever special exclusion logic is needed.
+        """
+        for k, v in attrs.items():
+            exclude = getattr(self, '_exclude_' + k, None)
+            if exclude:
+                exclude(v)
+            else:
+                self._exclude_misc(k, v)
+
+    def _exclude_packages(self, packages):
+        if not isinstance(packages, sequence):
+            raise DistutilsSetupError(
+                "packages: setting must be a list or tuple (%r)" % (packages,)
+            )
+        list(map(self.exclude_package, packages))
+
+    def _parse_command_opts(self, parser, args):
+        # Remove --with-X/--without-X options when processing command args
+        self.global_options = self.__class__.global_options
+        self.negative_opt = self.__class__.negative_opt
+
+        # First, expand any aliases
+        command = args[0]
+        aliases = self.get_option_dict('aliases')
+        while command in aliases:
+            src, alias = aliases[command]
+            del aliases[command]  # ensure each alias can expand only once!
+            import shlex
+            args[:1] = shlex.split(alias, True)
+            command = args[0]
+
+        nargs = _Distribution._parse_command_opts(self, parser, args)
+
+        # Handle commands that want to consume all remaining arguments
+        cmd_class = self.get_command_class(command)
+        if getattr(cmd_class, 'command_consumes_arguments', None):
+            self.get_option_dict(command)['args'] = ("command line", nargs)
+            if nargs is not None:
+                return []
+
+        return nargs
+
+    def get_cmdline_options(self):
+        """Return a '{cmd: {opt:val}}' map of all command-line options
+
+        Option names are all long, but do not include the leading '--', and
+        contain dashes rather than underscores.  If the option doesn't take
+        an argument (e.g. '--quiet'), the 'val' is 'None'.
+
+        Note that options provided by config files are intentionally excluded.
+        """
+
+        d = {}
+
+        for cmd, opts in self.command_options.items():
+
+            for opt, (src, val) in opts.items():
+
+                if src != "command line":
+                    continue
+
+                opt = opt.replace('_', '-')
+
+                if val == 0:
+                    cmdobj = self.get_command_obj(cmd)
+                    neg_opt = self.negative_opt.copy()
+                    neg_opt.update(getattr(cmdobj, 'negative_opt', {}))
+                    for neg, pos in neg_opt.items():
+                        if pos == opt:
+                            opt = neg
+                            val = None
+                            break
+                    else:
+                        raise AssertionError("Shouldn't be able to get here")
+
+                elif val == 1:
+                    val = None
+
+                d.setdefault(cmd, {})[opt] = val
+
+        return d
+
+    def iter_distribution_names(self):
+        """Yield all packages, modules, and extension names in distribution"""
+
+        for pkg in self.packages or ():
+            yield pkg
+
+        for module in self.py_modules or ():
+            yield module
+
+        for ext in self.ext_modules or ():
+            if isinstance(ext, tuple):
+                name, buildinfo = ext
+            else:
+                name = ext.name
+            if name.endswith('module'):
+                name = name[:-6]
+            yield name
+
+    def handle_display_options(self, option_order):
+        """If there were any non-global "display-only" options
+        (--help-commands or the metadata display options) on the command
+        line, display the requested info and return true; else return
+        false.
+        """
+        import sys
+
+        if six.PY2 or self.help_commands:
+            return _Distribution.handle_display_options(self, option_order)
+
+        # Stdout may be StringIO (e.g. in tests)
+        if not isinstance(sys.stdout, io.TextIOWrapper):
+            return _Distribution.handle_display_options(self, option_order)
+
+        # Don't wrap stdout if utf-8 is already the encoding. Provides
+        #  workaround for #334.
+        if sys.stdout.encoding.lower() in ('utf-8', 'utf8'):
+            return _Distribution.handle_display_options(self, option_order)
+
+        # Print metadata in UTF-8 no matter the platform
+        encoding = sys.stdout.encoding
+        errors = sys.stdout.errors
+        newline = sys.platform != 'win32' and '\n' or None
+        line_buffering = sys.stdout.line_buffering
+
+        sys.stdout = io.TextIOWrapper(
+            sys.stdout.detach(), 'utf-8', errors, newline, line_buffering)
+        try:
+            return _Distribution.handle_display_options(self, option_order)
+        finally:
+            sys.stdout = io.TextIOWrapper(
+                sys.stdout.detach(), encoding, errors, newline, line_buffering)
+
+
+class Feature:
+    """
+    **deprecated** -- The `Feature` facility was never completely implemented
+    or supported, `has reported issues
+    <https://github.com/pypa/setuptools/issues/58>`_ and will be removed in
+    a future version.
+
+    A subset of the distribution that can be excluded if unneeded/wanted
+
+    Features are created using these keyword arguments:
+
+      'description' -- a short, human readable description of the feature, to
+         be used in error messages, and option help messages.
+
+      'standard' -- if true, the feature is included by default if it is
+         available on the current system.  Otherwise, the feature is only
+         included if requested via a command line '--with-X' option, or if
+         another included feature requires it.  The default setting is 'False'.
+
+      'available' -- if true, the feature is available for installation on the
+         current system.  The default setting is 'True'.
+
+      'optional' -- if true, the feature's inclusion can be controlled from the
+         command line, using the '--with-X' or '--without-X' options.  If
+         false, the feature's inclusion status is determined automatically,
+         based on 'availabile', 'standard', and whether any other feature
+         requires it.  The default setting is 'True'.
+
+      'require_features' -- a string or sequence of strings naming features
+         that should also be included if this feature is included.  Defaults to
+         empty list.  May also contain 'Require' objects that should be
+         added/removed from the distribution.
+
+      'remove' -- a string or list of strings naming packages to be removed
+         from the distribution if this feature is *not* included.  If the
+         feature *is* included, this argument is ignored.  This argument exists
+         to support removing features that "crosscut" a distribution, such as
+         defining a 'tests' feature that removes all the 'tests' subpackages
+         provided by other features.  The default for this argument is an empty
+         list.  (Note: the named package(s) or modules must exist in the base
+         distribution when the 'setup()' function is initially called.)
+
+      other keywords -- any other keyword arguments are saved, and passed to
+         the distribution's 'include()' and 'exclude()' methods when the
+         feature is included or excluded, respectively.  So, for example, you
+         could pass 'packages=["a","b"]' to cause packages 'a' and 'b' to be
+         added or removed from the distribution as appropriate.
+
+    A feature must include at least one 'requires', 'remove', or other
+    keyword argument.  Otherwise, it can't affect the distribution in any way.
+    Note also that you can subclass 'Feature' to create your own specialized
+    feature types that modify the distribution in other ways when included or
+    excluded.  See the docstrings for the various methods here for more detail.
+    Aside from the methods, the only feature attributes that distributions look
+    at are 'description' and 'optional'.
+    """
+
+    @staticmethod
+    def warn_deprecated():
+        msg = (
+            "Features are deprecated and will be removed in a future "
+            "version. See https://github.com/pypa/setuptools/issues/65."
+        )
+        warnings.warn(msg, DistDeprecationWarning, stacklevel=3)
+
+    def __init__(
+            self, description, standard=False, available=True,
+            optional=True, require_features=(), remove=(), **extras):
+        self.warn_deprecated()
+
+        self.description = description
+        self.standard = standard
+        self.available = available
+        self.optional = optional
+        if isinstance(require_features, (str, Require)):
+            require_features = require_features,
+
+        self.require_features = [
+            r for r in require_features if isinstance(r, str)
+        ]
+        er = [r for r in require_features if not isinstance(r, str)]
+        if er:
+            extras['require_features'] = er
+
+        if isinstance(remove, str):
+            remove = remove,
+        self.remove = remove
+        self.extras = extras
+
+        if not remove and not require_features and not extras:
+            raise DistutilsSetupError(
+                "Feature %s: must define 'require_features', 'remove', or "
+                "at least one of 'packages', 'py_modules', etc."
+            )
+
+    def include_by_default(self):
+        """Should this feature be included by default?"""
+        return self.available and self.standard
+
+    def include_in(self, dist):
+        """Ensure feature and its requirements are included in distribution
+
+        You may override this in a subclass to perform additional operations on
+        the distribution.  Note that this method may be called more than once
+        per feature, and so should be idempotent.
+
+        """
+
+        if not self.available:
+            raise DistutilsPlatformError(
+                self.description + " is required, "
+                "but is not available on this platform"
+            )
+
+        dist.include(**self.extras)
+
+        for f in self.require_features:
+            dist.include_feature(f)
+
+    def exclude_from(self, dist):
+        """Ensure feature is excluded from distribution
+
+        You may override this in a subclass to perform additional operations on
+        the distribution.  This method will be called at most once per
+        feature, and only after all included features have been asked to
+        include themselves.
+        """
+
+        dist.exclude(**self.extras)
+
+        if self.remove:
+            for item in self.remove:
+                dist.exclude_package(item)
+
+    def validate(self, dist):
+        """Verify that feature makes sense in context of distribution
+
+        This method is called by the distribution just before it parses its
+        command line.  It checks to ensure that the 'remove' attribute, if any,
+        contains only valid package/module names that are present in the base
+        distribution when 'setup()' is called.  You may override it in a
+        subclass to perform any other required validation of the feature
+        against a target distribution.
+        """
+
+        for item in self.remove:
+            if not dist.has_contents_for(item):
+                raise DistutilsSetupError(
+                    "%s wants to be able to remove %s, but the distribution"
+                    " doesn't contain any packages or modules under %s"
+                    % (self.description, item, item)
+                )
+
+
+class DistDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in dist in
+    setuptools. Not ignored by default, unlike DeprecationWarning."""
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/extension.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/extension.py
new file mode 100644
index 0000000..2946889
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/extension.py
@@ -0,0 +1,57 @@
+import re
+import functools
+import distutils.core
+import distutils.errors
+import distutils.extension
+
+from setuptools.extern.six.moves import map
+
+from .monkey import get_unpatched
+
+
+def _have_cython():
+    """
+    Return True if Cython can be imported.
+    """
+    cython_impl = 'Cython.Distutils.build_ext'
+    try:
+        # from (cython_impl) import build_ext
+        __import__(cython_impl, fromlist=['build_ext']).build_ext
+        return True
+    except Exception:
+        pass
+    return False
+
+
+# for compatibility
+have_pyrex = _have_cython
+
+_Extension = get_unpatched(distutils.core.Extension)
+
+
+class Extension(_Extension):
+    """Extension that uses '.c' files in place of '.pyx' files"""
+
+    def __init__(self, name, sources, *args, **kw):
+        # The *args is needed for compatibility as calls may use positional
+        # arguments. py_limited_api may be set only via keyword.
+        self.py_limited_api = kw.pop("py_limited_api", False)
+        _Extension.__init__(self, name, sources, *args, **kw)
+
+    def _convert_pyx_sources_to_lang(self):
+        """
+        Replace sources with .pyx extensions to sources with the target
+        language extension. This mechanism allows language authors to supply
+        pre-converted sources but to prefer the .pyx sources.
+        """
+        if _have_cython():
+            # the build has Cython, so allow it to compile the .pyx files
+            return
+        lang = self.language or ''
+        target_ext = '.cpp' if lang.lower() == 'c++' else '.c'
+        sub = functools.partial(re.sub, '.pyx$', target_ext)
+        self.sources = list(map(sub, self.sources))
+
+
+class Library(Extension):
+    """Just like a regular Extension, but built as a library instead"""
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/extern/__init__.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/extern/__init__.py
new file mode 100644
index 0000000..e8c616f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/extern/__init__.py
@@ -0,0 +1,73 @@
+import sys
+
+
+class VendorImporter:
+    """
+    A PEP 302 meta path importer for finding optionally-vendored
+    or otherwise naturally-installed packages from root_name.
+    """
+
+    def __init__(self, root_name, vendored_names=(), vendor_pkg=None):
+        self.root_name = root_name
+        self.vendored_names = set(vendored_names)
+        self.vendor_pkg = vendor_pkg or root_name.replace('extern', '_vendor')
+
+    @property
+    def search_path(self):
+        """
+        Search first the vendor package then as a natural package.
+        """
+        yield self.vendor_pkg + '.'
+        yield ''
+
+    def find_module(self, fullname, path=None):
+        """
+        Return self when fullname starts with root_name and the
+        target module is one vendored through this importer.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        if root:
+            return
+        if not any(map(target.startswith, self.vendored_names)):
+            return
+        return self
+
+    def load_module(self, fullname):
+        """
+        Iterate over the search path to locate and load fullname.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        for prefix in self.search_path:
+            try:
+                extant = prefix + target
+                __import__(extant)
+                mod = sys.modules[extant]
+                sys.modules[fullname] = mod
+                # mysterious hack:
+                # Remove the reference to the extant package/module
+                # on later Python versions to cause relative imports
+                # in the vendor package to resolve the same modules
+                # as those going through this importer.
+                if sys.version_info >= (3, ):
+                    del sys.modules[extant]
+                return mod
+            except ImportError:
+                pass
+        else:
+            raise ImportError(
+                "The '{target}' package is required; "
+                "normally this is bundled with this package so if you get "
+                "this warning, consult the packager of your "
+                "distribution.".format(**locals())
+            )
+
+    def install(self):
+        """
+        Install this importer into sys.meta_path if not already present.
+        """
+        if self not in sys.meta_path:
+            sys.meta_path.append(self)
+
+
+names = 'six', 'packaging', 'pyparsing', 'ordered_set',
+VendorImporter(__name__, names, 'setuptools._vendor').install()
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/extern/__pycache__/__init__.cpython-38.pyc b/python3-vckonline/lib/python3.8/site-packages/setuptools/extern/__pycache__/__init__.cpython-38.pyc
new file mode 100644
index 0000000..6d33b13
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/setuptools/extern/__pycache__/__init__.cpython-38.pyc differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/glibc.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/glibc.py
new file mode 100644
index 0000000..a134591
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/glibc.py
@@ -0,0 +1,86 @@
+# This file originally from pip:
+# https://github.com/pypa/pip/blob/8f4f15a5a95d7d5b511ceaee9ed261176c181970/src/pip/_internal/utils/glibc.py
+from __future__ import absolute_import
+
+import ctypes
+import re
+import warnings
+
+
+def glibc_version_string():
+    "Returns glibc version string, or None if not using glibc."
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    process_namespace = ctypes.CDLL(None)
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str = gnu_get_libc_version()
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+# Separated out from have_compatible_glibc for easier unit testing
+def check_glibc_version(version_str, required_major, minimum_minor):
+    # Parse string and check against requested version.
+    #
+    # We use a regexp instead of str.split because we want to discard any
+    # random junk that might come after the minor version -- this might happen
+    # in patched/forked versions of glibc (e.g. Linaro's version of glibc
+    # uses version strings like "2.20-2014.11"). See gh-3588.
+    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
+    if not m:
+        warnings.warn("Expected glibc version with 2 components major.minor,"
+                      " got: %s" % version_str, RuntimeWarning)
+        return False
+    return (int(m.group("major")) == required_major and
+            int(m.group("minor")) >= minimum_minor)
+
+
+def have_compatible_glibc(required_major, minimum_minor):
+    version_str = glibc_version_string()
+    if version_str is None:
+        return False
+    return check_glibc_version(version_str, required_major, minimum_minor)
+
+
+# platform.libc_ver regularly returns completely nonsensical glibc
+# versions. E.g. on my computer, platform says:
+#
+#   ~$ python2.7 -c 'import platform; print(platform.libc_ver())'
+#   ('glibc', '2.7')
+#   ~$ python3.5 -c 'import platform; print(platform.libc_ver())'
+#   ('glibc', '2.9')
+#
+# But the truth is:
+#
+#   ~$ ldd --version
+#   ldd (Debian GLIBC 2.22-11) 2.22
+#
+# This is unfortunate, because it means that the linehaul data on libc
+# versions that was generated by pip 8.1.2 and earlier is useless and
+# misleading. Solution: instead of using platform, use our code that actually
+# works.
+def libc_ver():
+    """Try to determine the glibc version
+
+    Returns a tuple of strings (lib, version) which default to empty strings
+    in case the lookup fails.
+    """
+    glibc_version = glibc_version_string()
+    if glibc_version is None:
+        return ("", "")
+    else:
+        return ("glibc", glibc_version)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/glob.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/glob.py
new file mode 100644
index 0000000..9d7cbc5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/glob.py
@@ -0,0 +1,174 @@
+"""
+Filename globbing utility. Mostly a copy of `glob` from Python 3.5.
+
+Changes include:
+ * `yield from` and PEP3102 `*` removed.
+ * Hidden files are not ignored.
+"""
+
+import os
+import re
+import fnmatch
+
+__all__ = ["glob", "iglob", "escape"]
+
+
+def glob(pathname, recursive=False):
+    """Return a list of paths matching a pathname pattern.
+
+    The pattern may contain simple shell-style wildcards a la
+    fnmatch. However, unlike fnmatch, filenames starting with a
+    dot are special cases that are not matched by '*' and '?'
+    patterns.
+
+    If recursive is true, the pattern '**' will match any files and
+    zero or more directories and subdirectories.
+    """
+    return list(iglob(pathname, recursive=recursive))
+
+
+def iglob(pathname, recursive=False):
+    """Return an iterator which yields the paths matching a pathname pattern.
+
+    The pattern may contain simple shell-style wildcards a la
+    fnmatch. However, unlike fnmatch, filenames starting with a
+    dot are special cases that are not matched by '*' and '?'
+    patterns.
+
+    If recursive is true, the pattern '**' will match any files and
+    zero or more directories and subdirectories.
+    """
+    it = _iglob(pathname, recursive)
+    if recursive and _isrecursive(pathname):
+        s = next(it)  # skip empty string
+        assert not s
+    return it
+
+
+def _iglob(pathname, recursive):
+    dirname, basename = os.path.split(pathname)
+    if not has_magic(pathname):
+        if basename:
+            if os.path.lexists(pathname):
+                yield pathname
+        else:
+            # Patterns ending with a slash should match only directories
+            if os.path.isdir(dirname):
+                yield pathname
+        return
+    if not dirname:
+        if recursive and _isrecursive(basename):
+            for x in glob2(dirname, basename):
+                yield x
+        else:
+            for x in glob1(dirname, basename):
+                yield x
+        return
+    # `os.path.split()` returns the argument itself as a dirname if it is a
+    # drive or UNC path.  Prevent an infinite recursion if a drive or UNC path
+    # contains magic characters (i.e. r'\\?\C:').
+    if dirname != pathname and has_magic(dirname):
+        dirs = _iglob(dirname, recursive)
+    else:
+        dirs = [dirname]
+    if has_magic(basename):
+        if recursive and _isrecursive(basename):
+            glob_in_dir = glob2
+        else:
+            glob_in_dir = glob1
+    else:
+        glob_in_dir = glob0
+    for dirname in dirs:
+        for name in glob_in_dir(dirname, basename):
+            yield os.path.join(dirname, name)
+
+
+# These 2 helper functions non-recursively glob inside a literal directory.
+# They return a list of basenames. `glob1` accepts a pattern while `glob0`
+# takes a literal basename (so it only has to check for its existence).
+
+
+def glob1(dirname, pattern):
+    if not dirname:
+        if isinstance(pattern, bytes):
+            dirname = os.curdir.encode('ASCII')
+        else:
+            dirname = os.curdir
+    try:
+        names = os.listdir(dirname)
+    except OSError:
+        return []
+    return fnmatch.filter(names, pattern)
+
+
+def glob0(dirname, basename):
+    if not basename:
+        # `os.path.split()` returns an empty basename for paths ending with a
+        # directory separator.  'q*x/' should match only directories.
+        if os.path.isdir(dirname):
+            return [basename]
+    else:
+        if os.path.lexists(os.path.join(dirname, basename)):
+            return [basename]
+    return []
+
+
+# This helper function recursively yields relative pathnames inside a literal
+# directory.
+
+
+def glob2(dirname, pattern):
+    assert _isrecursive(pattern)
+    yield pattern[:0]
+    for x in _rlistdir(dirname):
+        yield x
+
+
+# Recursively yields relative pathnames inside a literal directory.
+def _rlistdir(dirname):
+    if not dirname:
+        if isinstance(dirname, bytes):
+            dirname = os.curdir.encode('ASCII')
+        else:
+            dirname = os.curdir
+    try:
+        names = os.listdir(dirname)
+    except os.error:
+        return
+    for x in names:
+        yield x
+        path = os.path.join(dirname, x) if dirname else x
+        for y in _rlistdir(path):
+            yield os.path.join(x, y)
+
+
+magic_check = re.compile('([*?[])')
+magic_check_bytes = re.compile(b'([*?[])')
+
+
+def has_magic(s):
+    if isinstance(s, bytes):
+        match = magic_check_bytes.search(s)
+    else:
+        match = magic_check.search(s)
+    return match is not None
+
+
+def _isrecursive(pattern):
+    if isinstance(pattern, bytes):
+        return pattern == b'**'
+    else:
+        return pattern == '**'
+
+
+def escape(pathname):
+    """Escape all special characters.
+    """
+    # Escaping is done by wrapping any of "*?[" between square brackets.
+    # Metacharacters do not work in the drive part and shouldn't be escaped.
+    drive, pathname = os.path.splitdrive(pathname)
+    if isinstance(pathname, bytes):
+        pathname = magic_check_bytes.sub(br'[\1]', pathname)
+    else:
+        pathname = magic_check.sub(r'[\1]', pathname)
+    return drive + pathname
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/launch.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/launch.py
new file mode 100644
index 0000000..308283e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/launch.py
@@ -0,0 +1,35 @@
+"""
+Launch the Python script on the command line after
+setuptools is bootstrapped via import.
+"""
+
+# Note that setuptools gets imported implicitly by the
+# invocation of this script using python -m setuptools.launch
+
+import tokenize
+import sys
+
+
+def run():
+    """
+    Run the script in sys.argv[1] as if it had
+    been invoked naturally.
+    """
+    __builtins__
+    script_name = sys.argv[1]
+    namespace = dict(
+        __file__=script_name,
+        __name__='__main__',
+        __doc__=None,
+    )
+    sys.argv[:] = sys.argv[1:]
+
+    open_ = getattr(tokenize, 'open', open)
+    script = open_(script_name).read()
+    norm_script = script.replace('\\r\\n', '\\n')
+    code = compile(norm_script, script_name, 'exec')
+    exec(code, namespace)
+
+
+if __name__ == '__main__':
+    run()
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/lib2to3_ex.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/lib2to3_ex.py
new file mode 100644
index 0000000..4b1a73f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/lib2to3_ex.py
@@ -0,0 +1,62 @@
+"""
+Customized Mixin2to3 support:
+
+ - adds support for converting doctests
+
+
+This module raises an ImportError on Python 2.
+"""
+
+from distutils.util import Mixin2to3 as _Mixin2to3
+from distutils import log
+from lib2to3.refactor import RefactoringTool, get_fixers_from_package
+
+import setuptools
+
+
+class DistutilsRefactoringTool(RefactoringTool):
+    def log_error(self, msg, *args, **kw):
+        log.error(msg, *args)
+
+    def log_message(self, msg, *args):
+        log.info(msg, *args)
+
+    def log_debug(self, msg, *args):
+        log.debug(msg, *args)
+
+
+class Mixin2to3(_Mixin2to3):
+    def run_2to3(self, files, doctests=False):
+        # See of the distribution option has been set, otherwise check the
+        # setuptools default.
+        if self.distribution.use_2to3 is not True:
+            return
+        if not files:
+            return
+        log.info("Fixing " + " ".join(files))
+        self.__build_fixer_names()
+        self.__exclude_fixers()
+        if doctests:
+            if setuptools.run_2to3_on_doctests:
+                r = DistutilsRefactoringTool(self.fixer_names)
+                r.refactor(files, write=True, doctests_only=True)
+        else:
+            _Mixin2to3.run_2to3(self, files)
+
+    def __build_fixer_names(self):
+        if self.fixer_names:
+            return
+        self.fixer_names = []
+        for p in setuptools.lib2to3_fixer_packages:
+            self.fixer_names.extend(get_fixers_from_package(p))
+        if self.distribution.use_2to3_fixers is not None:
+            for p in self.distribution.use_2to3_fixers:
+                self.fixer_names.extend(get_fixers_from_package(p))
+
+    def __exclude_fixers(self):
+        excluded_fixers = getattr(self, 'exclude_fixers', [])
+        if self.distribution.use_2to3_exclude_fixers is not None:
+            excluded_fixers.extend(self.distribution.use_2to3_exclude_fixers)
+        for fixer_name in excluded_fixers:
+            if fixer_name in self.fixer_names:
+                self.fixer_names.remove(fixer_name)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/monkey.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/monkey.py
new file mode 100644
index 0000000..3c77f8c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/monkey.py
@@ -0,0 +1,179 @@
+"""
+Monkey patching of distutils.
+"""
+
+import sys
+import distutils.filelist
+import platform
+import types
+import functools
+from importlib import import_module
+import inspect
+
+from setuptools.extern import six
+
+import setuptools
+
+__all__ = []
+"""
+Everything is private. Contact the project team
+if you think you need this functionality.
+"""
+
+
+def _get_mro(cls):
+    """
+    Returns the bases classes for cls sorted by the MRO.
+
+    Works around an issue on Jython where inspect.getmro will not return all
+    base classes if multiple classes share the same name. Instead, this
+    function will return a tuple containing the class itself, and the contents
+    of cls.__bases__. See https://github.com/pypa/setuptools/issues/1024.
+    """
+    if platform.python_implementation() == "Jython":
+        return (cls,) + cls.__bases__
+    return inspect.getmro(cls)
+
+
+def get_unpatched(item):
+    lookup = (
+        get_unpatched_class if isinstance(item, six.class_types) else
+        get_unpatched_function if isinstance(item, types.FunctionType) else
+        lambda item: None
+    )
+    return lookup(item)
+
+
+def get_unpatched_class(cls):
+    """Protect against re-patching the distutils if reloaded
+
+    Also ensures that no other distutils extension monkeypatched the distutils
+    first.
+    """
+    external_bases = (
+        cls
+        for cls in _get_mro(cls)
+        if not cls.__module__.startswith('setuptools')
+    )
+    base = next(external_bases)
+    if not base.__module__.startswith('distutils'):
+        msg = "distutils has already been patched by %r" % cls
+        raise AssertionError(msg)
+    return base
+
+
+def patch_all():
+    # we can't patch distutils.cmd, alas
+    distutils.core.Command = setuptools.Command
+
+    has_issue_12885 = sys.version_info <= (3, 5, 3)
+
+    if has_issue_12885:
+        # fix findall bug in distutils (http://bugs.python.org/issue12885)
+        distutils.filelist.findall = setuptools.findall
+
+    needs_warehouse = (
+        sys.version_info < (2, 7, 13)
+        or
+        (3, 4) < sys.version_info < (3, 4, 6)
+        or
+        (3, 5) < sys.version_info <= (3, 5, 3)
+    )
+
+    if needs_warehouse:
+        warehouse = 'https://upload.pypi.org/legacy/'
+        distutils.config.PyPIRCCommand.DEFAULT_REPOSITORY = warehouse
+
+    _patch_distribution_metadata()
+
+    # Install Distribution throughout the distutils
+    for module in distutils.dist, distutils.core, distutils.cmd:
+        module.Distribution = setuptools.dist.Distribution
+
+    # Install the patched Extension
+    distutils.core.Extension = setuptools.extension.Extension
+    distutils.extension.Extension = setuptools.extension.Extension
+    if 'distutils.command.build_ext' in sys.modules:
+        sys.modules['distutils.command.build_ext'].Extension = (
+            setuptools.extension.Extension
+        )
+
+    patch_for_msvc_specialized_compiler()
+
+
+def _patch_distribution_metadata():
+    """Patch write_pkg_file and read_pkg_file for higher metadata standards"""
+    for attr in ('write_pkg_file', 'read_pkg_file', 'get_metadata_version'):
+        new_val = getattr(setuptools.dist, attr)
+        setattr(distutils.dist.DistributionMetadata, attr, new_val)
+
+
+def patch_func(replacement, target_mod, func_name):
+    """
+    Patch func_name in target_mod with replacement
+
+    Important - original must be resolved by name to avoid
+    patching an already patched function.
+    """
+    original = getattr(target_mod, func_name)
+
+    # set the 'unpatched' attribute on the replacement to
+    # point to the original.
+    vars(replacement).setdefault('unpatched', original)
+
+    # replace the function in the original module
+    setattr(target_mod, func_name, replacement)
+
+
+def get_unpatched_function(candidate):
+    return getattr(candidate, 'unpatched')
+
+
+def patch_for_msvc_specialized_compiler():
+    """
+    Patch functions in distutils to use standalone Microsoft Visual C++
+    compilers.
+    """
+    # import late to avoid circular imports on Python < 3.5
+    msvc = import_module('setuptools.msvc')
+
+    if platform.system() != 'Windows':
+        # Compilers only availables on Microsoft Windows
+        return
+
+    def patch_params(mod_name, func_name):
+        """
+        Prepare the parameters for patch_func to patch indicated function.
+        """
+        repl_prefix = 'msvc9_' if 'msvc9' in mod_name else 'msvc14_'
+        repl_name = repl_prefix + func_name.lstrip('_')
+        repl = getattr(msvc, repl_name)
+        mod = import_module(mod_name)
+        if not hasattr(mod, func_name):
+            raise ImportError(func_name)
+        return repl, mod, func_name
+
+    # Python 2.7 to 3.4
+    msvc9 = functools.partial(patch_params, 'distutils.msvc9compiler')
+
+    # Python 3.5+
+    msvc14 = functools.partial(patch_params, 'distutils._msvccompiler')
+
+    try:
+        # Patch distutils.msvc9compiler
+        patch_func(*msvc9('find_vcvarsall'))
+        patch_func(*msvc9('query_vcvarsall'))
+    except ImportError:
+        pass
+
+    try:
+        # Patch distutils._msvccompiler._get_vc_env
+        patch_func(*msvc14('_get_vc_env'))
+    except ImportError:
+        pass
+
+    try:
+        # Patch distutils._msvccompiler.gen_lib_options for Numpy
+        patch_func(*msvc14('gen_lib_options'))
+    except ImportError:
+        pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/msvc.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/msvc.py
new file mode 100644
index 0000000..2ffe1c8
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/msvc.py
@@ -0,0 +1,1679 @@
+"""
+Improved support for Microsoft Visual C++ compilers.
+
+Known supported compilers:
+--------------------------
+Microsoft Visual C++ 9.0:
+    Microsoft Visual C++ Compiler for Python 2.7 (x86, amd64)
+    Microsoft Windows SDK 6.1 (x86, x64, ia64)
+    Microsoft Windows SDK 7.0 (x86, x64, ia64)
+
+Microsoft Visual C++ 10.0:
+    Microsoft Windows SDK 7.1 (x86, x64, ia64)
+
+Microsoft Visual C++ 14.X:
+    Microsoft Visual C++ Build Tools 2015 (x86, x64, arm)
+    Microsoft Visual Studio Build Tools 2017 (x86, x64, arm, arm64)
+    Microsoft Visual Studio Build Tools 2019 (x86, x64, arm, arm64)
+
+This may also support compilers shipped with compatible Visual Studio versions.
+"""
+
+import json
+from io import open
+from os import listdir, pathsep
+from os.path import join, isfile, isdir, dirname
+import sys
+import platform
+import itertools
+import distutils.errors
+from setuptools.extern.packaging.version import LegacyVersion
+
+from setuptools.extern.six.moves import filterfalse
+
+from .monkey import get_unpatched
+
+if platform.system() == 'Windows':
+    from setuptools.extern.six.moves import winreg
+    from os import environ
+else:
+    # Mock winreg and environ so the module can be imported on this platform.
+
+    class winreg:
+        HKEY_USERS = None
+        HKEY_CURRENT_USER = None
+        HKEY_LOCAL_MACHINE = None
+        HKEY_CLASSES_ROOT = None
+
+    environ = dict()
+
+_msvc9_suppress_errors = (
+    # msvc9compiler isn't available on some platforms
+    ImportError,
+
+    # msvc9compiler raises DistutilsPlatformError in some
+    # environments. See #1118.
+    distutils.errors.DistutilsPlatformError,
+)
+
+try:
+    from distutils.msvc9compiler import Reg
+except _msvc9_suppress_errors:
+    pass
+
+
+def msvc9_find_vcvarsall(version):
+    """
+    Patched "distutils.msvc9compiler.find_vcvarsall" to use the standalone
+    compiler build for Python
+    (VCForPython / Microsoft Visual C++ Compiler for Python 2.7).
+
+    Fall back to original behavior when the standalone compiler is not
+    available.
+
+    Redirect the path of "vcvarsall.bat".
+
+    Parameters
+    ----------
+    version: float
+        Required Microsoft Visual C++ version.
+
+    Return
+    ------
+    str
+        vcvarsall.bat path
+    """
+    vc_base = r'Software\%sMicrosoft\DevDiv\VCForPython\%0.1f'
+    key = vc_base % ('', version)
+    try:
+        # Per-user installs register the compiler path here
+        productdir = Reg.get_value(key, "installdir")
+    except KeyError:
+        try:
+            # All-user installs on a 64-bit system register here
+            key = vc_base % ('Wow6432Node\\', version)
+            productdir = Reg.get_value(key, "installdir")
+        except KeyError:
+            productdir = None
+
+    if productdir:
+        vcvarsall = join(productdir, "vcvarsall.bat")
+        if isfile(vcvarsall):
+            return vcvarsall
+
+    return get_unpatched(msvc9_find_vcvarsall)(version)
+
+
+def msvc9_query_vcvarsall(ver, arch='x86', *args, **kwargs):
+    """
+    Patched "distutils.msvc9compiler.query_vcvarsall" for support extra
+    Microsoft Visual C++ 9.0 and 10.0 compilers.
+
+    Set environment without use of "vcvarsall.bat".
+
+    Parameters
+    ----------
+    ver: float
+        Required Microsoft Visual C++ version.
+    arch: str
+        Target architecture.
+
+    Return
+    ------
+    dict
+        environment
+    """
+    # Try to get environment from vcvarsall.bat (Classical way)
+    try:
+        orig = get_unpatched(msvc9_query_vcvarsall)
+        return orig(ver, arch, *args, **kwargs)
+    except distutils.errors.DistutilsPlatformError:
+        # Pass error if Vcvarsall.bat is missing
+        pass
+    except ValueError:
+        # Pass error if environment not set after executing vcvarsall.bat
+        pass
+
+    # If error, try to set environment directly
+    try:
+        return EnvironmentInfo(arch, ver).return_env()
+    except distutils.errors.DistutilsPlatformError as exc:
+        _augment_exception(exc, ver, arch)
+        raise
+
+
+def msvc14_get_vc_env(plat_spec):
+    """
+    Patched "distutils._msvccompiler._get_vc_env" for support extra
+    Microsoft Visual C++ 14.X compilers.
+
+    Set environment without use of "vcvarsall.bat".
+
+    Parameters
+    ----------
+    plat_spec: str
+        Target architecture.
+
+    Return
+    ------
+    dict
+        environment
+    """
+    # Try to get environment from vcvarsall.bat (Classical way)
+    try:
+        return get_unpatched(msvc14_get_vc_env)(plat_spec)
+    except distutils.errors.DistutilsPlatformError:
+        # Pass error Vcvarsall.bat is missing
+        pass
+
+    # If error, try to set environment directly
+    try:
+        return EnvironmentInfo(plat_spec, vc_min_ver=14.0).return_env()
+    except distutils.errors.DistutilsPlatformError as exc:
+        _augment_exception(exc, 14.0)
+        raise
+
+
+def msvc14_gen_lib_options(*args, **kwargs):
+    """
+    Patched "distutils._msvccompiler.gen_lib_options" for fix
+    compatibility between "numpy.distutils" and "distutils._msvccompiler"
+    (for Numpy < 1.11.2)
+    """
+    if "numpy.distutils" in sys.modules:
+        import numpy as np
+        if LegacyVersion(np.__version__) < LegacyVersion('1.11.2'):
+            return np.distutils.ccompiler.gen_lib_options(*args, **kwargs)
+    return get_unpatched(msvc14_gen_lib_options)(*args, **kwargs)
+
+
+def _augment_exception(exc, version, arch=''):
+    """
+    Add details to the exception message to help guide the user
+    as to what action will resolve it.
+    """
+    # Error if MSVC++ directory not found or environment not set
+    message = exc.args[0]
+
+    if "vcvarsall" in message.lower() or "visual c" in message.lower():
+        # Special error message if MSVC++ not installed
+        tmpl = 'Microsoft Visual C++ {version:0.1f} is required.'
+        message = tmpl.format(**locals())
+        msdownload = 'www.microsoft.com/download/details.aspx?id=%d'
+        if version == 9.0:
+            if arch.lower().find('ia64') > -1:
+                # For VC++ 9.0, if IA64 support is needed, redirect user
+                # to Windows SDK 7.0.
+                # Note: No download link available from Microsoft.
+                message += ' Get it with "Microsoft Windows SDK 7.0"'
+            else:
+                # For VC++ 9.0 redirect user to Vc++ for Python 2.7 :
+                # This redirection link is maintained by Microsoft.
+                # Contact vspython@microsoft.com if it needs updating.
+                message += ' Get it from http://aka.ms/vcpython27'
+        elif version == 10.0:
+            # For VC++ 10.0 Redirect user to Windows SDK 7.1
+            message += ' Get it with "Microsoft Windows SDK 7.1": '
+            message += msdownload % 8279
+        elif version >= 14.0:
+            # For VC++ 14.X Redirect user to latest Visual C++ Build Tools
+            message += (' Get it with "Build Tools for Visual Studio": '
+                        r'https://visualstudio.microsoft.com/downloads/')
+
+    exc.args = (message, )
+
+
+class PlatformInfo:
+    """
+    Current and Target Architectures information.
+
+    Parameters
+    ----------
+    arch: str
+        Target architecture.
+    """
+    current_cpu = environ.get('processor_architecture', '').lower()
+
+    def __init__(self, arch):
+        self.arch = arch.lower().replace('x64', 'amd64')
+
+    @property
+    def target_cpu(self):
+        """
+        Return Target CPU architecture.
+
+        Return
+        ------
+        str
+            Target CPU
+        """
+        return self.arch[self.arch.find('_') + 1:]
+
+    def target_is_x86(self):
+        """
+        Return True if target CPU is x86 32 bits..
+
+        Return
+        ------
+        bool
+            CPU is x86 32 bits
+        """
+        return self.target_cpu == 'x86'
+
+    def current_is_x86(self):
+        """
+        Return True if current CPU is x86 32 bits..
+
+        Return
+        ------
+        bool
+            CPU is x86 32 bits
+        """
+        return self.current_cpu == 'x86'
+
+    def current_dir(self, hidex86=False, x64=False):
+        """
+        Current platform specific subfolder.
+
+        Parameters
+        ----------
+        hidex86: bool
+            return '' and not '\x86' if architecture is x86.
+        x64: bool
+            return '\x64' and not '\amd64' if architecture is amd64.
+
+        Return
+        ------
+        str
+            subfolder: '\target', or '' (see hidex86 parameter)
+        """
+        return (
+            '' if (self.current_cpu == 'x86' and hidex86) else
+            r'\x64' if (self.current_cpu == 'amd64' and x64) else
+            r'\%s' % self.current_cpu
+        )
+
+    def target_dir(self, hidex86=False, x64=False):
+        r"""
+        Target platform specific subfolder.
+
+        Parameters
+        ----------
+        hidex86: bool
+            return '' and not '\x86' if architecture is x86.
+        x64: bool
+            return '\x64' and not '\amd64' if architecture is amd64.
+
+        Return
+        ------
+        str
+            subfolder: '\current', or '' (see hidex86 parameter)
+        """
+        return (
+            '' if (self.target_cpu == 'x86' and hidex86) else
+            r'\x64' if (self.target_cpu == 'amd64' and x64) else
+            r'\%s' % self.target_cpu
+        )
+
+    def cross_dir(self, forcex86=False):
+        r"""
+        Cross platform specific subfolder.
+
+        Parameters
+        ----------
+        forcex86: bool
+            Use 'x86' as current architecture even if current architecture is
+            not x86.
+
+        Return
+        ------
+        str
+            subfolder: '' if target architecture is current architecture,
+            '\current_target' if not.
+        """
+        current = 'x86' if forcex86 else self.current_cpu
+        return (
+            '' if self.target_cpu == current else
+            self.target_dir().replace('\\', '\\%s_' % current)
+        )
+
+
+class RegistryInfo:
+    """
+    Microsoft Visual Studio related registry information.
+
+    Parameters
+    ----------
+    platform_info: PlatformInfo
+        "PlatformInfo" instance.
+    """
+    HKEYS = (winreg.HKEY_USERS,
+             winreg.HKEY_CURRENT_USER,
+             winreg.HKEY_LOCAL_MACHINE,
+             winreg.HKEY_CLASSES_ROOT)
+
+    def __init__(self, platform_info):
+        self.pi = platform_info
+
+    @property
+    def visualstudio(self):
+        """
+        Microsoft Visual Studio root registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return 'VisualStudio'
+
+    @property
+    def sxs(self):
+        """
+        Microsoft Visual Studio SxS registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return join(self.visualstudio, 'SxS')
+
+    @property
+    def vc(self):
+        """
+        Microsoft Visual C++ VC7 registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return join(self.sxs, 'VC7')
+
+    @property
+    def vs(self):
+        """
+        Microsoft Visual Studio VS7 registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return join(self.sxs, 'VS7')
+
+    @property
+    def vc_for_python(self):
+        """
+        Microsoft Visual C++ for Python registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return r'DevDiv\VCForPython'
+
+    @property
+    def microsoft_sdk(self):
+        """
+        Microsoft SDK registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return 'Microsoft SDKs'
+
+    @property
+    def windows_sdk(self):
+        """
+        Microsoft Windows/Platform SDK registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return join(self.microsoft_sdk, 'Windows')
+
+    @property
+    def netfx_sdk(self):
+        """
+        Microsoft .NET Framework SDK registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return join(self.microsoft_sdk, 'NETFXSDK')
+
+    @property
+    def windows_kits_roots(self):
+        """
+        Microsoft Windows Kits Roots registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return r'Windows Kits\Installed Roots'
+
+    def microsoft(self, key, x86=False):
+        """
+        Return key in Microsoft software registry.
+
+        Parameters
+        ----------
+        key: str
+            Registry key path where look.
+        x86: str
+            Force x86 software registry.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        node64 = '' if self.pi.current_is_x86() or x86 else 'Wow6432Node'
+        return join('Software', node64, 'Microsoft', key)
+
+    def lookup(self, key, name):
+        """
+        Look for values in registry in Microsoft software registry.
+
+        Parameters
+        ----------
+        key: str
+            Registry key path where look.
+        name: str
+            Value name to find.
+
+        Return
+        ------
+        str
+            value
+        """
+        key_read = winreg.KEY_READ
+        openkey = winreg.OpenKey
+        ms = self.microsoft
+        for hkey in self.HKEYS:
+            try:
+                bkey = openkey(hkey, ms(key), 0, key_read)
+            except (OSError, IOError):
+                if not self.pi.current_is_x86():
+                    try:
+                        bkey = openkey(hkey, ms(key, True), 0, key_read)
+                    except (OSError, IOError):
+                        continue
+                else:
+                    continue
+            try:
+                return winreg.QueryValueEx(bkey, name)[0]
+            except (OSError, IOError):
+                pass
+
+
+class SystemInfo:
+    """
+    Microsoft Windows and Visual Studio related system information.
+
+    Parameters
+    ----------
+    registry_info: RegistryInfo
+        "RegistryInfo" instance.
+    vc_ver: float
+        Required Microsoft Visual C++ version.
+    """
+
+    # Variables and properties in this class use originals CamelCase variables
+    # names from Microsoft source files for more easy comparison.
+    WinDir = environ.get('WinDir', '')
+    ProgramFiles = environ.get('ProgramFiles', '')
+    ProgramFilesx86 = environ.get('ProgramFiles(x86)', ProgramFiles)
+
+    def __init__(self, registry_info, vc_ver=None):
+        self.ri = registry_info
+        self.pi = self.ri.pi
+
+        self.known_vs_paths = self.find_programdata_vs_vers()
+
+        # Except for VS15+, VC version is aligned with VS version
+        self.vs_ver = self.vc_ver = (
+                vc_ver or self._find_latest_available_vs_ver())
+
+    def _find_latest_available_vs_ver(self):
+        """
+        Find the latest VC version
+
+        Return
+        ------
+        float
+            version
+        """
+        reg_vc_vers = self.find_reg_vs_vers()
+
+        if not (reg_vc_vers or self.known_vs_paths):
+            raise distutils.errors.DistutilsPlatformError(
+                'No Microsoft Visual C++ version found')
+
+        vc_vers = set(reg_vc_vers)
+        vc_vers.update(self.known_vs_paths)
+        return sorted(vc_vers)[-1]
+
+    def find_reg_vs_vers(self):
+        """
+        Find Microsoft Visual Studio versions available in registry.
+
+        Return
+        ------
+        list of float
+            Versions
+        """
+        ms = self.ri.microsoft
+        vckeys = (self.ri.vc, self.ri.vc_for_python, self.ri.vs)
+        vs_vers = []
+        for hkey in self.ri.HKEYS:
+            for key in vckeys:
+                try:
+                    bkey = winreg.OpenKey(hkey, ms(key), 0, winreg.KEY_READ)
+                except (OSError, IOError):
+                    continue
+                subkeys, values, _ = winreg.QueryInfoKey(bkey)
+                for i in range(values):
+                    try:
+                        ver = float(winreg.EnumValue(bkey, i)[0])
+                        if ver not in vs_vers:
+                            vs_vers.append(ver)
+                    except ValueError:
+                        pass
+                for i in range(subkeys):
+                    try:
+                        ver = float(winreg.EnumKey(bkey, i))
+                        if ver not in vs_vers:
+                            vs_vers.append(ver)
+                    except ValueError:
+                        pass
+        return sorted(vs_vers)
+
+    def find_programdata_vs_vers(self):
+        r"""
+        Find Visual studio 2017+ versions from information in
+        "C:\ProgramData\Microsoft\VisualStudio\Packages\_Instances".
+
+        Return
+        ------
+        dict
+            float version as key, path as value.
+        """
+        vs_versions = {}
+        instances_dir = \
+            r'C:\ProgramData\Microsoft\VisualStudio\Packages\_Instances'
+
+        try:
+            hashed_names = listdir(instances_dir)
+
+        except (OSError, IOError):
+            # Directory not exists with all Visual Studio versions
+            return vs_versions
+
+        for name in hashed_names:
+            try:
+                # Get VS installation path from "state.json" file
+                state_path = join(instances_dir, name, 'state.json')
+                with open(state_path, 'rt', encoding='utf-8') as state_file:
+                    state = json.load(state_file)
+                vs_path = state['installationPath']
+
+                # Raises OSError if this VS installation does not contain VC
+                listdir(join(vs_path, r'VC\Tools\MSVC'))
+
+                # Store version and path
+                vs_versions[self._as_float_version(
+                    state['installationVersion'])] = vs_path
+
+            except (OSError, IOError, KeyError):
+                # Skip if "state.json" file is missing or bad format
+                continue
+
+        return vs_versions
+
+    @staticmethod
+    def _as_float_version(version):
+        """
+        Return a string version as a simplified float version (major.minor)
+
+        Parameters
+        ----------
+        version: str
+            Version.
+
+        Return
+        ------
+        float
+            version
+        """
+        return float('.'.join(version.split('.')[:2]))
+
+    @property
+    def VSInstallDir(self):
+        """
+        Microsoft Visual Studio directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        # Default path
+        default = join(self.ProgramFilesx86,
+                       'Microsoft Visual Studio %0.1f' % self.vs_ver)
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vs, '%0.1f' % self.vs_ver) or default
+
+    @property
+    def VCInstallDir(self):
+        """
+        Microsoft Visual C++ directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        path = self._guess_vc() or self._guess_vc_legacy()
+
+        if not isdir(path):
+            msg = 'Microsoft Visual C++ directory not found'
+            raise distutils.errors.DistutilsPlatformError(msg)
+
+        return path
+
+    def _guess_vc(self):
+        """
+        Locate Visual C++ for VS2017+.
+
+        Return
+        ------
+        str
+            path
+        """
+        if self.vs_ver <= 14.0:
+            return ''
+
+        try:
+            # First search in known VS paths
+            vs_dir = self.known_vs_paths[self.vs_ver]
+        except KeyError:
+            # Else, search with path from registry
+            vs_dir = self.VSInstallDir
+
+        guess_vc = join(vs_dir, r'VC\Tools\MSVC')
+
+        # Subdir with VC exact version as name
+        try:
+            # Update the VC version with real one instead of VS version
+            vc_ver = listdir(guess_vc)[-1]
+            self.vc_ver = self._as_float_version(vc_ver)
+            return join(guess_vc, vc_ver)
+        except (OSError, IOError, IndexError):
+            return ''
+
+    def _guess_vc_legacy(self):
+        """
+        Locate Visual C++ for versions prior to 2017.
+
+        Return
+        ------
+        str
+            path
+        """
+        default = join(self.ProgramFilesx86,
+                       r'Microsoft Visual Studio %0.1f\VC' % self.vs_ver)
+
+        # Try to get "VC++ for Python" path from registry as default path
+        reg_path = join(self.ri.vc_for_python, '%0.1f' % self.vs_ver)
+        python_vc = self.ri.lookup(reg_path, 'installdir')
+        default_vc = join(python_vc, 'VC') if python_vc else default
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vc, '%0.1f' % self.vs_ver) or default_vc
+
+    @property
+    def WindowsSdkVersion(self):
+        """
+        Microsoft Windows SDK versions for specified MSVC++ version.
+
+        Return
+        ------
+        tuple of str
+            versions
+        """
+        if self.vs_ver <= 9.0:
+            return '7.0', '6.1', '6.0a'
+        elif self.vs_ver == 10.0:
+            return '7.1', '7.0a'
+        elif self.vs_ver == 11.0:
+            return '8.0', '8.0a'
+        elif self.vs_ver == 12.0:
+            return '8.1', '8.1a'
+        elif self.vs_ver >= 14.0:
+            return '10.0', '8.1'
+
+    @property
+    def WindowsSdkLastVersion(self):
+        """
+        Microsoft Windows SDK last version.
+
+        Return
+        ------
+        str
+            version
+        """
+        return self._use_last_dir_name(join(self.WindowsSdkDir, 'lib'))
+
+    @property
+    def WindowsSdkDir(self):
+        """
+        Microsoft Windows SDK directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        sdkdir = ''
+        for ver in self.WindowsSdkVersion:
+            # Try to get it from registry
+            loc = join(self.ri.windows_sdk, 'v%s' % ver)
+            sdkdir = self.ri.lookup(loc, 'installationfolder')
+            if sdkdir:
+                break
+        if not sdkdir or not isdir(sdkdir):
+            # Try to get "VC++ for Python" version from registry
+            path = join(self.ri.vc_for_python, '%0.1f' % self.vc_ver)
+            install_base = self.ri.lookup(path, 'installdir')
+            if install_base:
+                sdkdir = join(install_base, 'WinSDK')
+        if not sdkdir or not isdir(sdkdir):
+            # If fail, use default new path
+            for ver in self.WindowsSdkVersion:
+                intver = ver[:ver.rfind('.')]
+                path = r'Microsoft SDKs\Windows Kits\%s' % intver
+                d = join(self.ProgramFiles, path)
+                if isdir(d):
+                    sdkdir = d
+        if not sdkdir or not isdir(sdkdir):
+            # If fail, use default old path
+            for ver in self.WindowsSdkVersion:
+                path = r'Microsoft SDKs\Windows\v%s' % ver
+                d = join(self.ProgramFiles, path)
+                if isdir(d):
+                    sdkdir = d
+        if not sdkdir:
+            # If fail, use Platform SDK
+            sdkdir = join(self.VCInstallDir, 'PlatformSDK')
+        return sdkdir
+
+    @property
+    def WindowsSDKExecutablePath(self):
+        """
+        Microsoft Windows SDK executable directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        # Find WinSDK NetFx Tools registry dir name
+        if self.vs_ver <= 11.0:
+            netfxver = 35
+            arch = ''
+        else:
+            netfxver = 40
+            hidex86 = True if self.vs_ver <= 12.0 else False
+            arch = self.pi.current_dir(x64=True, hidex86=hidex86)
+        fx = 'WinSDK-NetFx%dTools%s' % (netfxver, arch.replace('\\', '-'))
+
+        # list all possibles registry paths
+        regpaths = []
+        if self.vs_ver >= 14.0:
+            for ver in self.NetFxSdkVersion:
+                regpaths += [join(self.ri.netfx_sdk, ver, fx)]
+
+        for ver in self.WindowsSdkVersion:
+            regpaths += [join(self.ri.windows_sdk, 'v%sA' % ver, fx)]
+
+        # Return installation folder from the more recent path
+        for path in regpaths:
+            execpath = self.ri.lookup(path, 'installationfolder')
+            if execpath:
+                return execpath
+
+    @property
+    def FSharpInstallDir(self):
+        """
+        Microsoft Visual F# directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        path = join(self.ri.visualstudio, r'%0.1f\Setup\F#' % self.vs_ver)
+        return self.ri.lookup(path, 'productdir') or ''
+
+    @property
+    def UniversalCRTSdkDir(self):
+        """
+        Microsoft Universal CRT SDK directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        # Set Kit Roots versions for specified MSVC++ version
+        vers = ('10', '81') if self.vs_ver >= 14.0 else ()
+
+        # Find path of the more recent Kit
+        for ver in vers:
+            sdkdir = self.ri.lookup(self.ri.windows_kits_roots,
+                                    'kitsroot%s' % ver)
+            if sdkdir:
+                return sdkdir or ''
+
+    @property
+    def UniversalCRTSdkLastVersion(self):
+        """
+        Microsoft Universal C Runtime SDK last version.
+
+        Return
+        ------
+        str
+            version
+        """
+        return self._use_last_dir_name(join(self.UniversalCRTSdkDir, 'lib'))
+
+    @property
+    def NetFxSdkVersion(self):
+        """
+        Microsoft .NET Framework SDK versions.
+
+        Return
+        ------
+        tuple of str
+            versions
+        """
+        # Set FxSdk versions for specified VS version
+        return (('4.7.2', '4.7.1', '4.7',
+                 '4.6.2', '4.6.1', '4.6',
+                 '4.5.2', '4.5.1', '4.5')
+                if self.vs_ver >= 14.0 else ())
+
+    @property
+    def NetFxSdkDir(self):
+        """
+        Microsoft .NET Framework SDK directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        sdkdir = ''
+        for ver in self.NetFxSdkVersion:
+            loc = join(self.ri.netfx_sdk, ver)
+            sdkdir = self.ri.lookup(loc, 'kitsinstallationfolder')
+            if sdkdir:
+                break
+        return sdkdir
+
+    @property
+    def FrameworkDir32(self):
+        """
+        Microsoft .NET Framework 32bit directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        # Default path
+        guess_fw = join(self.WinDir, r'Microsoft.NET\Framework')
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vc, 'frameworkdir32') or guess_fw
+
+    @property
+    def FrameworkDir64(self):
+        """
+        Microsoft .NET Framework 64bit directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        # Default path
+        guess_fw = join(self.WinDir, r'Microsoft.NET\Framework64')
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vc, 'frameworkdir64') or guess_fw
+
+    @property
+    def FrameworkVersion32(self):
+        """
+        Microsoft .NET Framework 32bit versions.
+
+        Return
+        ------
+        tuple of str
+            versions
+        """
+        return self._find_dot_net_versions(32)
+
+    @property
+    def FrameworkVersion64(self):
+        """
+        Microsoft .NET Framework 64bit versions.
+
+        Return
+        ------
+        tuple of str
+            versions
+        """
+        return self._find_dot_net_versions(64)
+
+    def _find_dot_net_versions(self, bits):
+        """
+        Find Microsoft .NET Framework versions.
+
+        Parameters
+        ----------
+        bits: int
+            Platform number of bits: 32 or 64.
+
+        Return
+        ------
+        tuple of str
+            versions
+        """
+        # Find actual .NET version in registry
+        reg_ver = self.ri.lookup(self.ri.vc, 'frameworkver%d' % bits)
+        dot_net_dir = getattr(self, 'FrameworkDir%d' % bits)
+        ver = reg_ver or self._use_last_dir_name(dot_net_dir, 'v') or ''
+
+        # Set .NET versions for specified MSVC++ version
+        if self.vs_ver >= 12.0:
+            return ver, 'v4.0'
+        elif self.vs_ver >= 10.0:
+            return 'v4.0.30319' if ver.lower()[:2] != 'v4' else ver, 'v3.5'
+        elif self.vs_ver == 9.0:
+            return 'v3.5', 'v2.0.50727'
+        elif self.vs_ver == 8.0:
+            return 'v3.0', 'v2.0.50727'
+
+    @staticmethod
+    def _use_last_dir_name(path, prefix=''):
+        """
+        Return name of the last dir in path or '' if no dir found.
+
+        Parameters
+        ----------
+        path: str
+            Use dirs in this path
+        prefix: str
+            Use only dirs starting by this prefix
+
+        Return
+        ------
+        str
+            name
+        """
+        matching_dirs = (
+            dir_name
+            for dir_name in reversed(listdir(path))
+            if isdir(join(path, dir_name)) and
+            dir_name.startswith(prefix)
+        )
+        return next(matching_dirs, None) or ''
+
+
+class EnvironmentInfo:
+    """
+    Return environment variables for specified Microsoft Visual C++ version
+    and platform : Lib, Include, Path and libpath.
+
+    This function is compatible with Microsoft Visual C++ 9.0 to 14.X.
+
+    Script created by analysing Microsoft environment configuration files like
+    "vcvars[...].bat", "SetEnv.Cmd", "vcbuildtools.bat", ...
+
+    Parameters
+    ----------
+    arch: str
+        Target architecture.
+    vc_ver: float
+        Required Microsoft Visual C++ version. If not set, autodetect the last
+        version.
+    vc_min_ver: float
+        Minimum Microsoft Visual C++ version.
+    """
+
+    # Variables and properties in this class use originals CamelCase variables
+    # names from Microsoft source files for more easy comparison.
+
+    def __init__(self, arch, vc_ver=None, vc_min_ver=0):
+        self.pi = PlatformInfo(arch)
+        self.ri = RegistryInfo(self.pi)
+        self.si = SystemInfo(self.ri, vc_ver)
+
+        if self.vc_ver < vc_min_ver:
+            err = 'No suitable Microsoft Visual C++ version found'
+            raise distutils.errors.DistutilsPlatformError(err)
+
+    @property
+    def vs_ver(self):
+        """
+        Microsoft Visual Studio.
+
+        Return
+        ------
+        float
+            version
+        """
+        return self.si.vs_ver
+
+    @property
+    def vc_ver(self):
+        """
+        Microsoft Visual C++ version.
+
+        Return
+        ------
+        float
+            version
+        """
+        return self.si.vc_ver
+
+    @property
+    def VSTools(self):
+        """
+        Microsoft Visual Studio Tools.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        paths = [r'Common7\IDE', r'Common7\Tools']
+
+        if self.vs_ver >= 14.0:
+            arch_subdir = self.pi.current_dir(hidex86=True, x64=True)
+            paths += [r'Common7\IDE\CommonExtensions\Microsoft\TestWindow']
+            paths += [r'Team Tools\Performance Tools']
+            paths += [r'Team Tools\Performance Tools%s' % arch_subdir]
+
+        return [join(self.si.VSInstallDir, path) for path in paths]
+
+    @property
+    def VCIncludes(self):
+        """
+        Microsoft Visual C++ & Microsoft Foundation Class Includes.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        return [join(self.si.VCInstallDir, 'Include'),
+                join(self.si.VCInstallDir, r'ATLMFC\Include')]
+
+    @property
+    def VCLibraries(self):
+        """
+        Microsoft Visual C++ & Microsoft Foundation Class Libraries.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver >= 15.0:
+            arch_subdir = self.pi.target_dir(x64=True)
+        else:
+            arch_subdir = self.pi.target_dir(hidex86=True)
+        paths = ['Lib%s' % arch_subdir, r'ATLMFC\Lib%s' % arch_subdir]
+
+        if self.vs_ver >= 14.0:
+            paths += [r'Lib\store%s' % arch_subdir]
+
+        return [join(self.si.VCInstallDir, path) for path in paths]
+
+    @property
+    def VCStoreRefs(self):
+        """
+        Microsoft Visual C++ store references Libraries.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 14.0:
+            return []
+        return [join(self.si.VCInstallDir, r'Lib\store\references')]
+
+    @property
+    def VCTools(self):
+        """
+        Microsoft Visual C++ Tools.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        si = self.si
+        tools = [join(si.VCInstallDir, 'VCPackages')]
+
+        forcex86 = True if self.vs_ver <= 10.0 else False
+        arch_subdir = self.pi.cross_dir(forcex86)
+        if arch_subdir:
+            tools += [join(si.VCInstallDir, 'Bin%s' % arch_subdir)]
+
+        if self.vs_ver == 14.0:
+            path = 'Bin%s' % self.pi.current_dir(hidex86=True)
+            tools += [join(si.VCInstallDir, path)]
+
+        elif self.vs_ver >= 15.0:
+            host_dir = (r'bin\HostX86%s' if self.pi.current_is_x86() else
+                        r'bin\HostX64%s')
+            tools += [join(
+                si.VCInstallDir, host_dir % self.pi.target_dir(x64=True))]
+
+            if self.pi.current_cpu != self.pi.target_cpu:
+                tools += [join(
+                    si.VCInstallDir, host_dir % self.pi.current_dir(x64=True))]
+
+        else:
+            tools += [join(si.VCInstallDir, 'Bin')]
+
+        return tools
+
+    @property
+    def OSLibraries(self):
+        """
+        Microsoft Windows SDK Libraries.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver <= 10.0:
+            arch_subdir = self.pi.target_dir(hidex86=True, x64=True)
+            return [join(self.si.WindowsSdkDir, 'Lib%s' % arch_subdir)]
+
+        else:
+            arch_subdir = self.pi.target_dir(x64=True)
+            lib = join(self.si.WindowsSdkDir, 'lib')
+            libver = self._sdk_subdir
+            return [join(lib, '%sum%s' % (libver , arch_subdir))]
+
+    @property
+    def OSIncludes(self):
+        """
+        Microsoft Windows SDK Include.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        include = join(self.si.WindowsSdkDir, 'include')
+
+        if self.vs_ver <= 10.0:
+            return [include, join(include, 'gl')]
+
+        else:
+            if self.vs_ver >= 14.0:
+                sdkver = self._sdk_subdir
+            else:
+                sdkver = ''
+            return [join(include, '%sshared' % sdkver),
+                    join(include, '%sum' % sdkver),
+                    join(include, '%swinrt' % sdkver)]
+
+    @property
+    def OSLibpath(self):
+        """
+        Microsoft Windows SDK Libraries Paths.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        ref = join(self.si.WindowsSdkDir, 'References')
+        libpath = []
+
+        if self.vs_ver <= 9.0:
+            libpath += self.OSLibraries
+
+        if self.vs_ver >= 11.0:
+            libpath += [join(ref, r'CommonConfiguration\Neutral')]
+
+        if self.vs_ver >= 14.0:
+            libpath += [
+                ref,
+                join(self.si.WindowsSdkDir, 'UnionMetadata'),
+                join(ref, 'Windows.Foundation.UniversalApiContract', '1.0.0.0'),
+                join(ref, 'Windows.Foundation.FoundationContract', '1.0.0.0'),
+                join(ref,'Windows.Networking.Connectivity.WwanContract',
+                     '1.0.0.0'),
+                join(self.si.WindowsSdkDir, 'ExtensionSDKs', 'Microsoft.VCLibs',
+                     '%0.1f' % self.vs_ver, 'References', 'CommonConfiguration',
+                     'neutral'),
+            ]
+        return libpath
+
+    @property
+    def SdkTools(self):
+        """
+        Microsoft Windows SDK Tools.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        return list(self._sdk_tools())
+
+    def _sdk_tools(self):
+        """
+        Microsoft Windows SDK Tools paths generator.
+
+        Return
+        ------
+        generator of str
+            paths
+        """
+        if self.vs_ver < 15.0:
+            bin_dir = 'Bin' if self.vs_ver <= 11.0 else r'Bin\x86'
+            yield join(self.si.WindowsSdkDir, bin_dir)
+
+        if not self.pi.current_is_x86():
+            arch_subdir = self.pi.current_dir(x64=True)
+            path = 'Bin%s' % arch_subdir
+            yield join(self.si.WindowsSdkDir, path)
+
+        if self.vs_ver in (10.0, 11.0):
+            if self.pi.target_is_x86():
+                arch_subdir = ''
+            else:
+                arch_subdir = self.pi.current_dir(hidex86=True, x64=True)
+            path = r'Bin\NETFX 4.0 Tools%s' % arch_subdir
+            yield join(self.si.WindowsSdkDir, path)
+
+        elif self.vs_ver >= 15.0:
+            path = join(self.si.WindowsSdkDir, 'Bin')
+            arch_subdir = self.pi.current_dir(x64=True)
+            sdkver = self.si.WindowsSdkLastVersion
+            yield join(path, '%s%s' % (sdkver, arch_subdir))
+
+        if self.si.WindowsSDKExecutablePath:
+            yield self.si.WindowsSDKExecutablePath
+
+    @property
+    def _sdk_subdir(self):
+        """
+        Microsoft Windows SDK version subdir.
+
+        Return
+        ------
+        str
+            subdir
+        """
+        ucrtver = self.si.WindowsSdkLastVersion
+        return ('%s\\' % ucrtver) if ucrtver else ''
+
+    @property
+    def SdkSetup(self):
+        """
+        Microsoft Windows SDK Setup.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver > 9.0:
+            return []
+
+        return [join(self.si.WindowsSdkDir, 'Setup')]
+
+    @property
+    def FxTools(self):
+        """
+        Microsoft .NET Framework Tools.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        pi = self.pi
+        si = self.si
+
+        if self.vs_ver <= 10.0:
+            include32 = True
+            include64 = not pi.target_is_x86() and not pi.current_is_x86()
+        else:
+            include32 = pi.target_is_x86() or pi.current_is_x86()
+            include64 = pi.current_cpu == 'amd64' or pi.target_cpu == 'amd64'
+
+        tools = []
+        if include32:
+            tools += [join(si.FrameworkDir32, ver)
+                      for ver in si.FrameworkVersion32]
+        if include64:
+            tools += [join(si.FrameworkDir64, ver)
+                      for ver in si.FrameworkVersion64]
+        return tools
+
+    @property
+    def NetFxSDKLibraries(self):
+        """
+        Microsoft .Net Framework SDK Libraries.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 14.0 or not self.si.NetFxSdkDir:
+            return []
+
+        arch_subdir = self.pi.target_dir(x64=True)
+        return [join(self.si.NetFxSdkDir, r'lib\um%s' % arch_subdir)]
+
+    @property
+    def NetFxSDKIncludes(self):
+        """
+        Microsoft .Net Framework SDK Includes.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 14.0 or not self.si.NetFxSdkDir:
+            return []
+
+        return [join(self.si.NetFxSdkDir, r'include\um')]
+
+    @property
+    def VsTDb(self):
+        """
+        Microsoft Visual Studio Team System Database.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        return [join(self.si.VSInstallDir, r'VSTSDB\Deploy')]
+
+    @property
+    def MSBuild(self):
+        """
+        Microsoft Build Engine.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 12.0:
+            return []
+        elif self.vs_ver < 15.0:
+            base_path = self.si.ProgramFilesx86
+            arch_subdir = self.pi.current_dir(hidex86=True)
+        else:
+            base_path = self.si.VSInstallDir
+            arch_subdir = ''
+
+        path = r'MSBuild\%0.1f\bin%s' % (self.vs_ver, arch_subdir)
+        build = [join(base_path, path)]
+
+        if self.vs_ver >= 15.0:
+            # Add Roslyn C# & Visual Basic Compiler
+            build += [join(base_path, path, 'Roslyn')]
+
+        return build
+
+    @property
+    def HTMLHelpWorkshop(self):
+        """
+        Microsoft HTML Help Workshop.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 11.0:
+            return []
+
+        return [join(self.si.ProgramFilesx86, 'HTML Help Workshop')]
+
+    @property
+    def UCRTLibraries(self):
+        """
+        Microsoft Universal C Runtime SDK Libraries.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 14.0:
+            return []
+
+        arch_subdir = self.pi.target_dir(x64=True)
+        lib = join(self.si.UniversalCRTSdkDir, 'lib')
+        ucrtver = self._ucrt_subdir
+        return [join(lib, '%sucrt%s' % (ucrtver, arch_subdir))]
+
+    @property
+    def UCRTIncludes(self):
+        """
+        Microsoft Universal C Runtime SDK Include.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 14.0:
+            return []
+
+        include = join(self.si.UniversalCRTSdkDir, 'include')
+        return [join(include, '%sucrt' % self._ucrt_subdir)]
+
+    @property
+    def _ucrt_subdir(self):
+        """
+        Microsoft Universal C Runtime SDK version subdir.
+
+        Return
+        ------
+        str
+            subdir
+        """
+        ucrtver = self.si.UniversalCRTSdkLastVersion
+        return ('%s\\' % ucrtver) if ucrtver else ''
+
+    @property
+    def FSharp(self):
+        """
+        Microsoft Visual F#.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if 11.0 > self.vs_ver > 12.0:
+            return []
+
+        return [self.si.FSharpInstallDir]
+
+    @property
+    def VCRuntimeRedist(self):
+        """
+        Microsoft Visual C++ runtime redistributable dll.
+
+        Return
+        ------
+        str
+            path
+        """
+        vcruntime = 'vcruntime%d0.dll' % self.vc_ver
+        arch_subdir = self.pi.target_dir(x64=True).strip('\\')
+
+        # Installation prefixes candidates
+        prefixes = []
+        tools_path = self.si.VCInstallDir
+        redist_path = dirname(tools_path.replace(r'\Tools', r'\Redist'))
+        if isdir(redist_path):
+            # Redist version may not be exactly the same as tools
+            redist_path = join(redist_path, listdir(redist_path)[-1])
+            prefixes += [redist_path, join(redist_path, 'onecore')]
+
+        prefixes += [join(tools_path, 'redist')]  # VS14 legacy path
+
+        # CRT directory
+        crt_dirs = ('Microsoft.VC%d.CRT' % (self.vc_ver * 10),
+                    # Sometime store in directory with VS version instead of VC
+                    'Microsoft.VC%d.CRT' % (int(self.vs_ver) * 10))
+
+        # vcruntime path
+        for prefix, crt_dir in itertools.product(prefixes, crt_dirs):
+            path = join(prefix, arch_subdir, crt_dir, vcruntime)
+            if isfile(path):
+                return path
+
+    def return_env(self, exists=True):
+        """
+        Return environment dict.
+
+        Parameters
+        ----------
+        exists: bool
+            It True, only return existing paths.
+
+        Return
+        ------
+        dict
+            environment
+        """
+        env = dict(
+            include=self._build_paths('include',
+                                      [self.VCIncludes,
+                                       self.OSIncludes,
+                                       self.UCRTIncludes,
+                                       self.NetFxSDKIncludes],
+                                      exists),
+            lib=self._build_paths('lib',
+                                  [self.VCLibraries,
+                                   self.OSLibraries,
+                                   self.FxTools,
+                                   self.UCRTLibraries,
+                                   self.NetFxSDKLibraries],
+                                  exists),
+            libpath=self._build_paths('libpath',
+                                      [self.VCLibraries,
+                                       self.FxTools,
+                                       self.VCStoreRefs,
+                                       self.OSLibpath],
+                                      exists),
+            path=self._build_paths('path',
+                                   [self.VCTools,
+                                    self.VSTools,
+                                    self.VsTDb,
+                                    self.SdkTools,
+                                    self.SdkSetup,
+                                    self.FxTools,
+                                    self.MSBuild,
+                                    self.HTMLHelpWorkshop,
+                                    self.FSharp],
+                                   exists),
+        )
+        if self.vs_ver >= 14 and isfile(self.VCRuntimeRedist):
+            env['py_vcruntime_redist'] = self.VCRuntimeRedist
+        return env
+
+    def _build_paths(self, name, spec_path_lists, exists):
+        """
+        Given an environment variable name and specified paths,
+        return a pathsep-separated string of paths containing
+        unique, extant, directories from those paths and from
+        the environment variable. Raise an error if no paths
+        are resolved.
+
+        Parameters
+        ----------
+        name: str
+            Environment variable name
+        spec_path_lists: list of str
+            Paths
+        exists: bool
+            It True, only return existing paths.
+
+        Return
+        ------
+        str
+            Pathsep-separated paths
+        """
+        # flatten spec_path_lists
+        spec_paths = itertools.chain.from_iterable(spec_path_lists)
+        env_paths = environ.get(name, '').split(pathsep)
+        paths = itertools.chain(spec_paths, env_paths)
+        extant_paths = list(filter(isdir, paths)) if exists else paths
+        if not extant_paths:
+            msg = "%s environment variable is empty" % name.upper()
+            raise distutils.errors.DistutilsPlatformError(msg)
+        unique_paths = self._unique_everseen(extant_paths)
+        return pathsep.join(unique_paths)
+
+    # from Python docs
+    @staticmethod
+    def _unique_everseen(iterable, key=None):
+        """
+        List unique elements, preserving order.
+        Remember all elements ever seen.
+
+        _unique_everseen('AAAABBBCCDAABBB') --> A B C D
+
+        _unique_everseen('ABBCcAD', str.lower) --> A B C D
+        """
+        seen = set()
+        seen_add = seen.add
+        if key is None:
+            for element in filterfalse(seen.__contains__, iterable):
+                seen_add(element)
+                yield element
+        else:
+            for element in iterable:
+                k = key(element)
+                if k not in seen:
+                    seen_add(k)
+                    yield element
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/namespaces.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/namespaces.py
new file mode 100644
index 0000000..dc16106
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/namespaces.py
@@ -0,0 +1,107 @@
+import os
+from distutils import log
+import itertools
+
+from setuptools.extern.six.moves import map
+
+
+flatten = itertools.chain.from_iterable
+
+
+class Installer:
+
+    nspkg_ext = '-nspkg.pth'
+
+    def install_namespaces(self):
+        nsp = self._get_all_ns_packages()
+        if not nsp:
+            return
+        filename, ext = os.path.splitext(self._get_target())
+        filename += self.nspkg_ext
+        self.outputs.append(filename)
+        log.info("Installing %s", filename)
+        lines = map(self._gen_nspkg_line, nsp)
+
+        if self.dry_run:
+            # always generate the lines, even in dry run
+            list(lines)
+            return
+
+        with open(filename, 'wt') as f:
+            f.writelines(lines)
+
+    def uninstall_namespaces(self):
+        filename, ext = os.path.splitext(self._get_target())
+        filename += self.nspkg_ext
+        if not os.path.exists(filename):
+            return
+        log.info("Removing %s", filename)
+        os.remove(filename)
+
+    def _get_target(self):
+        return self.target
+
+    _nspkg_tmpl = (
+        "import sys, types, os",
+        "has_mfs = sys.version_info > (3, 5)",
+        "p = os.path.join(%(root)s, *%(pth)r)",
+        "importlib = has_mfs and __import__('importlib.util')",
+        "has_mfs and __import__('importlib.machinery')",
+        "m = has_mfs and "
+            "sys.modules.setdefault(%(pkg)r, "
+                "importlib.util.module_from_spec("
+                    "importlib.machinery.PathFinder.find_spec(%(pkg)r, "
+                        "[os.path.dirname(p)])))",
+        "m = m or "
+            "sys.modules.setdefault(%(pkg)r, types.ModuleType(%(pkg)r))",
+        "mp = (m or []) and m.__dict__.setdefault('__path__',[])",
+        "(p not in mp) and mp.append(p)",
+    )
+    "lines for the namespace installer"
+
+    _nspkg_tmpl_multi = (
+        'm and setattr(sys.modules[%(parent)r], %(child)r, m)',
+    )
+    "additional line(s) when a parent package is indicated"
+
+    def _get_root(self):
+        return "sys._getframe(1).f_locals['sitedir']"
+
+    def _gen_nspkg_line(self, pkg):
+        # ensure pkg is not a unicode string under Python 2.7
+        pkg = str(pkg)
+        pth = tuple(pkg.split('.'))
+        root = self._get_root()
+        tmpl_lines = self._nspkg_tmpl
+        parent, sep, child = pkg.rpartition('.')
+        if parent:
+            tmpl_lines += self._nspkg_tmpl_multi
+        return ';'.join(tmpl_lines) % locals() + '\n'
+
+    def _get_all_ns_packages(self):
+        """Return sorted list of all package namespaces"""
+        pkgs = self.distribution.namespace_packages or []
+        return sorted(flatten(map(self._pkg_names, pkgs)))
+
+    @staticmethod
+    def _pkg_names(pkg):
+        """
+        Given a namespace package, yield the components of that
+        package.
+
+        >>> names = Installer._pkg_names('a.b.c')
+        >>> set(names) == set(['a', 'a.b', 'a.b.c'])
+        True
+        """
+        parts = pkg.split('.')
+        while parts:
+            yield '.'.join(parts)
+            parts.pop()
+
+
+class DevelopInstaller(Installer):
+    def _get_root(self):
+        return repr(str(self.egg_path))
+
+    def _get_target(self):
+        return self.egg_link
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/package_index.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/package_index.py
new file mode 100644
index 0000000..f419d47
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/package_index.py
@@ -0,0 +1,1136 @@
+"""PyPI and direct package downloading"""
+import sys
+import os
+import re
+import shutil
+import socket
+import base64
+import hashlib
+import itertools
+import warnings
+from functools import wraps
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import urllib, http_client, configparser, map
+
+import setuptools
+from pkg_resources import (
+    CHECKOUT_DIST, Distribution, BINARY_DIST, normalize_path, SOURCE_DIST,
+    Environment, find_distributions, safe_name, safe_version,
+    to_filename, Requirement, DEVELOP_DIST, EGG_DIST,
+)
+from setuptools import ssl_support
+from distutils import log
+from distutils.errors import DistutilsError
+from fnmatch import translate
+from setuptools.py27compat import get_all_headers
+from setuptools.py33compat import unescape
+from setuptools.wheel import Wheel
+
+__metaclass__ = type
+
+EGG_FRAGMENT = re.compile(r'^egg=([-A-Za-z0-9_.+!]+)$')
+HREF = re.compile(r"""href\s*=\s*['"]?([^'"> ]+)""", re.I)
+PYPI_MD5 = re.compile(
+    r'<a href="([^"#]+)">([^<]+)</a>\n\s+\(<a (?:title="MD5 hash"\n\s+)'
+    r'href="[^?]+\?:action=show_md5&amp;digest=([0-9a-f]{32})">md5</a>\)'
+)
+URL_SCHEME = re.compile('([-+.a-z0-9]{2,}):', re.I).match
+EXTENSIONS = ".tar.gz .tar.bz2 .tar .zip .tgz".split()
+
+__all__ = [
+    'PackageIndex', 'distros_for_url', 'parse_bdist_wininst',
+    'interpret_distro_name',
+]
+
+_SOCKET_TIMEOUT = 15
+
+_tmpl = "setuptools/{setuptools.__version__} Python-urllib/{py_major}"
+user_agent = _tmpl.format(py_major='{}.{}'.format(*sys.version_info), setuptools=setuptools)
+
+
+def parse_requirement_arg(spec):
+    try:
+        return Requirement.parse(spec)
+    except ValueError:
+        raise DistutilsError(
+            "Not a URL, existing file, or requirement spec: %r" % (spec,)
+        )
+
+
+def parse_bdist_wininst(name):
+    """Return (base,pyversion) or (None,None) for possible .exe name"""
+
+    lower = name.lower()
+    base, py_ver, plat = None, None, None
+
+    if lower.endswith('.exe'):
+        if lower.endswith('.win32.exe'):
+            base = name[:-10]
+            plat = 'win32'
+        elif lower.startswith('.win32-py', -16):
+            py_ver = name[-7:-4]
+            base = name[:-16]
+            plat = 'win32'
+        elif lower.endswith('.win-amd64.exe'):
+            base = name[:-14]
+            plat = 'win-amd64'
+        elif lower.startswith('.win-amd64-py', -20):
+            py_ver = name[-7:-4]
+            base = name[:-20]
+            plat = 'win-amd64'
+    return base, py_ver, plat
+
+
+def egg_info_for_url(url):
+    parts = urllib.parse.urlparse(url)
+    scheme, server, path, parameters, query, fragment = parts
+    base = urllib.parse.unquote(path.split('/')[-1])
+    if server == 'sourceforge.net' and base == 'download':  # XXX Yuck
+        base = urllib.parse.unquote(path.split('/')[-2])
+    if '#' in base:
+        base, fragment = base.split('#', 1)
+    return base, fragment
+
+
+def distros_for_url(url, metadata=None):
+    """Yield egg or source distribution objects that might be found at a URL"""
+    base, fragment = egg_info_for_url(url)
+    for dist in distros_for_location(url, base, metadata):
+        yield dist
+    if fragment:
+        match = EGG_FRAGMENT.match(fragment)
+        if match:
+            for dist in interpret_distro_name(
+                url, match.group(1), metadata, precedence=CHECKOUT_DIST
+            ):
+                yield dist
+
+
+def distros_for_location(location, basename, metadata=None):
+    """Yield egg or source distribution objects based on basename"""
+    if basename.endswith('.egg.zip'):
+        basename = basename[:-4]  # strip the .zip
+    if basename.endswith('.egg') and '-' in basename:
+        # only one, unambiguous interpretation
+        return [Distribution.from_location(location, basename, metadata)]
+    if basename.endswith('.whl') and '-' in basename:
+        wheel = Wheel(basename)
+        if not wheel.is_compatible():
+            return []
+        return [Distribution(
+            location=location,
+            project_name=wheel.project_name,
+            version=wheel.version,
+            # Increase priority over eggs.
+            precedence=EGG_DIST + 1,
+        )]
+    if basename.endswith('.exe'):
+        win_base, py_ver, platform = parse_bdist_wininst(basename)
+        if win_base is not None:
+            return interpret_distro_name(
+                location, win_base, metadata, py_ver, BINARY_DIST, platform
+            )
+    # Try source distro extensions (.zip, .tgz, etc.)
+    #
+    for ext in EXTENSIONS:
+        if basename.endswith(ext):
+            basename = basename[:-len(ext)]
+            return interpret_distro_name(location, basename, metadata)
+    return []  # no extension matched
+
+
+def distros_for_filename(filename, metadata=None):
+    """Yield possible egg or source distribution objects based on a filename"""
+    return distros_for_location(
+        normalize_path(filename), os.path.basename(filename), metadata
+    )
+
+
+def interpret_distro_name(
+        location, basename, metadata, py_version=None, precedence=SOURCE_DIST,
+        platform=None
+):
+    """Generate alternative interpretations of a source distro name
+
+    Note: if `location` is a filesystem filename, you should call
+    ``pkg_resources.normalize_path()`` on it before passing it to this
+    routine!
+    """
+    # Generate alternative interpretations of a source distro name
+    # Because some packages are ambiguous as to name/versions split
+    # e.g. "adns-python-1.1.0", "egenix-mx-commercial", etc.
+    # So, we generate each possible interepretation (e.g. "adns, python-1.1.0"
+    # "adns-python, 1.1.0", and "adns-python-1.1.0, no version").  In practice,
+    # the spurious interpretations should be ignored, because in the event
+    # there's also an "adns" package, the spurious "python-1.1.0" version will
+    # compare lower than any numeric version number, and is therefore unlikely
+    # to match a request for it.  It's still a potential problem, though, and
+    # in the long run PyPI and the distutils should go for "safe" names and
+    # versions in distribution archive names (sdist and bdist).
+
+    parts = basename.split('-')
+    if not py_version and any(re.match(r'py\d\.\d$', p) for p in parts[2:]):
+        # it is a bdist_dumb, not an sdist -- bail out
+        return
+
+    for p in range(1, len(parts) + 1):
+        yield Distribution(
+            location, metadata, '-'.join(parts[:p]), '-'.join(parts[p:]),
+            py_version=py_version, precedence=precedence,
+            platform=platform
+        )
+
+
+# From Python 2.7 docs
+def unique_everseen(iterable, key=None):
+    "List unique elements, preserving order. Remember all elements ever seen."
+    # unique_everseen('AAAABBBCCDAABBB') --> A B C D
+    # unique_everseen('ABBCcAD', str.lower) --> A B C D
+    seen = set()
+    seen_add = seen.add
+    if key is None:
+        for element in six.moves.filterfalse(seen.__contains__, iterable):
+            seen_add(element)
+            yield element
+    else:
+        for element in iterable:
+            k = key(element)
+            if k not in seen:
+                seen_add(k)
+                yield element
+
+
+def unique_values(func):
+    """
+    Wrap a function returning an iterable such that the resulting iterable
+    only ever yields unique items.
+    """
+
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        return unique_everseen(func(*args, **kwargs))
+
+    return wrapper
+
+
+REL = re.compile(r"""<([^>]*\srel\s*=\s*['"]?([^'">]+)[^>]*)>""", re.I)
+# this line is here to fix emacs' cruddy broken syntax highlighting
+
+
+@unique_values
+def find_external_links(url, page):
+    """Find rel="homepage" and rel="download" links in `page`, yielding URLs"""
+
+    for match in REL.finditer(page):
+        tag, rel = match.groups()
+        rels = set(map(str.strip, rel.lower().split(',')))
+        if 'homepage' in rels or 'download' in rels:
+            for match in HREF.finditer(tag):
+                yield urllib.parse.urljoin(url, htmldecode(match.group(1)))
+
+    for tag in ("<th>Home Page", "<th>Download URL"):
+        pos = page.find(tag)
+        if pos != -1:
+            match = HREF.search(page, pos)
+            if match:
+                yield urllib.parse.urljoin(url, htmldecode(match.group(1)))
+
+
+class ContentChecker:
+    """
+    A null content checker that defines the interface for checking content
+    """
+
+    def feed(self, block):
+        """
+        Feed a block of data to the hash.
+        """
+        return
+
+    def is_valid(self):
+        """
+        Check the hash. Return False if validation fails.
+        """
+        return True
+
+    def report(self, reporter, template):
+        """
+        Call reporter with information about the checker (hash name)
+        substituted into the template.
+        """
+        return
+
+
+class HashChecker(ContentChecker):
+    pattern = re.compile(
+        r'(?P<hash_name>sha1|sha224|sha384|sha256|sha512|md5)='
+        r'(?P<expected>[a-f0-9]+)'
+    )
+
+    def __init__(self, hash_name, expected):
+        self.hash_name = hash_name
+        self.hash = hashlib.new(hash_name)
+        self.expected = expected
+
+    @classmethod
+    def from_url(cls, url):
+        "Construct a (possibly null) ContentChecker from a URL"
+        fragment = urllib.parse.urlparse(url)[-1]
+        if not fragment:
+            return ContentChecker()
+        match = cls.pattern.search(fragment)
+        if not match:
+            return ContentChecker()
+        return cls(**match.groupdict())
+
+    def feed(self, block):
+        self.hash.update(block)
+
+    def is_valid(self):
+        return self.hash.hexdigest() == self.expected
+
+    def report(self, reporter, template):
+        msg = template % self.hash_name
+        return reporter(msg)
+
+
+class PackageIndex(Environment):
+    """A distribution index that scans web pages for download URLs"""
+
+    def __init__(
+            self, index_url="https://pypi.org/simple/", hosts=('*',),
+            ca_bundle=None, verify_ssl=True, *args, **kw
+    ):
+        Environment.__init__(self, *args, **kw)
+        self.index_url = index_url + "/" [:not index_url.endswith('/')]
+        self.scanned_urls = {}
+        self.fetched_urls = {}
+        self.package_pages = {}
+        self.allows = re.compile('|'.join(map(translate, hosts))).match
+        self.to_scan = []
+        use_ssl = (
+            verify_ssl
+            and ssl_support.is_available
+            and (ca_bundle or ssl_support.find_ca_bundle())
+        )
+        if use_ssl:
+            self.opener = ssl_support.opener_for(ca_bundle)
+        else:
+            self.opener = urllib.request.urlopen
+
+    def process_url(self, url, retrieve=False):
+        """Evaluate a URL as a possible download, and maybe retrieve it"""
+        if url in self.scanned_urls and not retrieve:
+            return
+        self.scanned_urls[url] = True
+        if not URL_SCHEME(url):
+            self.process_filename(url)
+            return
+        else:
+            dists = list(distros_for_url(url))
+            if dists:
+                if not self.url_ok(url):
+                    return
+                self.debug("Found link: %s", url)
+
+        if dists or not retrieve or url in self.fetched_urls:
+            list(map(self.add, dists))
+            return  # don't need the actual page
+
+        if not self.url_ok(url):
+            self.fetched_urls[url] = True
+            return
+
+        self.info("Reading %s", url)
+        self.fetched_urls[url] = True  # prevent multiple fetch attempts
+        tmpl = "Download error on %s: %%s -- Some packages may not be found!"
+        f = self.open_url(url, tmpl % url)
+        if f is None:
+            return
+        self.fetched_urls[f.url] = True
+        if 'html' not in f.headers.get('content-type', '').lower():
+            f.close()  # not html, we can't process it
+            return
+
+        base = f.url  # handle redirects
+        page = f.read()
+        if not isinstance(page, str):
+            # In Python 3 and got bytes but want str.
+            if isinstance(f, urllib.error.HTTPError):
+                # Errors have no charset, assume latin1:
+                charset = 'latin-1'
+            else:
+                charset = f.headers.get_param('charset') or 'latin-1'
+            page = page.decode(charset, "ignore")
+        f.close()
+        for match in HREF.finditer(page):
+            link = urllib.parse.urljoin(base, htmldecode(match.group(1)))
+            self.process_url(link)
+        if url.startswith(self.index_url) and getattr(f, 'code', None) != 404:
+            page = self.process_index(url, page)
+
+    def process_filename(self, fn, nested=False):
+        # process filenames or directories
+        if not os.path.exists(fn):
+            self.warn("Not found: %s", fn)
+            return
+
+        if os.path.isdir(fn) and not nested:
+            path = os.path.realpath(fn)
+            for item in os.listdir(path):
+                self.process_filename(os.path.join(path, item), True)
+
+        dists = distros_for_filename(fn)
+        if dists:
+            self.debug("Found: %s", fn)
+            list(map(self.add, dists))
+
+    def url_ok(self, url, fatal=False):
+        s = URL_SCHEME(url)
+        is_file = s and s.group(1).lower() == 'file'
+        if is_file or self.allows(urllib.parse.urlparse(url)[1]):
+            return True
+        msg = (
+            "\nNote: Bypassing %s (disallowed host; see "
+            "http://bit.ly/2hrImnY for details).\n")
+        if fatal:
+            raise DistutilsError(msg % url)
+        else:
+            self.warn(msg, url)
+
+    def scan_egg_links(self, search_path):
+        dirs = filter(os.path.isdir, search_path)
+        egg_links = (
+            (path, entry)
+            for path in dirs
+            for entry in os.listdir(path)
+            if entry.endswith('.egg-link')
+        )
+        list(itertools.starmap(self.scan_egg_link, egg_links))
+
+    def scan_egg_link(self, path, entry):
+        with open(os.path.join(path, entry)) as raw_lines:
+            # filter non-empty lines
+            lines = list(filter(None, map(str.strip, raw_lines)))
+
+        if len(lines) != 2:
+            # format is not recognized; punt
+            return
+
+        egg_path, setup_path = lines
+
+        for dist in find_distributions(os.path.join(path, egg_path)):
+            dist.location = os.path.join(path, *lines)
+            dist.precedence = SOURCE_DIST
+            self.add(dist)
+
+    def process_index(self, url, page):
+        """Process the contents of a PyPI page"""
+
+        def scan(link):
+            # Process a URL to see if it's for a package page
+            if link.startswith(self.index_url):
+                parts = list(map(
+                    urllib.parse.unquote, link[len(self.index_url):].split('/')
+                ))
+                if len(parts) == 2 and '#' not in parts[1]:
+                    # it's a package page, sanitize and index it
+                    pkg = safe_name(parts[0])
+                    ver = safe_version(parts[1])
+                    self.package_pages.setdefault(pkg.lower(), {})[link] = True
+                    return to_filename(pkg), to_filename(ver)
+            return None, None
+
+        # process an index page into the package-page index
+        for match in HREF.finditer(page):
+            try:
+                scan(urllib.parse.urljoin(url, htmldecode(match.group(1))))
+            except ValueError:
+                pass
+
+        pkg, ver = scan(url)  # ensure this page is in the page index
+        if pkg:
+            # process individual package page
+            for new_url in find_external_links(url, page):
+                # Process the found URL
+                base, frag = egg_info_for_url(new_url)
+                if base.endswith('.py') and not frag:
+                    if ver:
+                        new_url += '#egg=%s-%s' % (pkg, ver)
+                    else:
+                        self.need_version_info(url)
+                self.scan_url(new_url)
+
+            return PYPI_MD5.sub(
+                lambda m: '<a href="%s#md5=%s">%s</a>' % m.group(1, 3, 2), page
+            )
+        else:
+            return ""  # no sense double-scanning non-package pages
+
+    def need_version_info(self, url):
+        self.scan_all(
+            "Page at %s links to .py file(s) without version info; an index "
+            "scan is required.", url
+        )
+
+    def scan_all(self, msg=None, *args):
+        if self.index_url not in self.fetched_urls:
+            if msg:
+                self.warn(msg, *args)
+            self.info(
+                "Scanning index of all packages (this may take a while)"
+            )
+        self.scan_url(self.index_url)
+
+    def find_packages(self, requirement):
+        self.scan_url(self.index_url + requirement.unsafe_name + '/')
+
+        if not self.package_pages.get(requirement.key):
+            # Fall back to safe version of the name
+            self.scan_url(self.index_url + requirement.project_name + '/')
+
+        if not self.package_pages.get(requirement.key):
+            # We couldn't find the target package, so search the index page too
+            self.not_found_in_index(requirement)
+
+        for url in list(self.package_pages.get(requirement.key, ())):
+            # scan each page that might be related to the desired package
+            self.scan_url(url)
+
+    def obtain(self, requirement, installer=None):
+        self.prescan()
+        self.find_packages(requirement)
+        for dist in self[requirement.key]:
+            if dist in requirement:
+                return dist
+            self.debug("%s does not match %s", requirement, dist)
+        return super(PackageIndex, self).obtain(requirement, installer)
+
+    def check_hash(self, checker, filename, tfp):
+        """
+        checker is a ContentChecker
+        """
+        checker.report(
+            self.debug,
+            "Validating %%s checksum for %s" % filename)
+        if not checker.is_valid():
+            tfp.close()
+            os.unlink(filename)
+            raise DistutilsError(
+                "%s validation failed for %s; "
+                "possible download problem?"
+                % (checker.hash.name, os.path.basename(filename))
+            )
+
+    def add_find_links(self, urls):
+        """Add `urls` to the list that will be prescanned for searches"""
+        for url in urls:
+            if (
+                self.to_scan is None  # if we have already "gone online"
+                or not URL_SCHEME(url)  # or it's a local file/directory
+                or url.startswith('file:')
+                or list(distros_for_url(url))  # or a direct package link
+            ):
+                # then go ahead and process it now
+                self.scan_url(url)
+            else:
+                # otherwise, defer retrieval till later
+                self.to_scan.append(url)
+
+    def prescan(self):
+        """Scan urls scheduled for prescanning (e.g. --find-links)"""
+        if self.to_scan:
+            list(map(self.scan_url, self.to_scan))
+        self.to_scan = None  # from now on, go ahead and process immediately
+
+    def not_found_in_index(self, requirement):
+        if self[requirement.key]:  # we've seen at least one distro
+            meth, msg = self.info, "Couldn't retrieve index page for %r"
+        else:  # no distros seen for this name, might be misspelled
+            meth, msg = (
+                self.warn,
+                "Couldn't find index page for %r (maybe misspelled?)")
+        meth(msg, requirement.unsafe_name)
+        self.scan_all()
+
+    def download(self, spec, tmpdir):
+        """Locate and/or download `spec` to `tmpdir`, returning a local path
+
+        `spec` may be a ``Requirement`` object, or a string containing a URL,
+        an existing local filename, or a project/version requirement spec
+        (i.e. the string form of a ``Requirement`` object).  If it is the URL
+        of a .py file with an unambiguous ``#egg=name-version`` tag (i.e., one
+        that escapes ``-`` as ``_`` throughout), a trivial ``setup.py`` is
+        automatically created alongside the downloaded file.
+
+        If `spec` is a ``Requirement`` object or a string containing a
+        project/version requirement spec, this method returns the location of
+        a matching distribution (possibly after downloading it to `tmpdir`).
+        If `spec` is a locally existing file or directory name, it is simply
+        returned unchanged.  If `spec` is a URL, it is downloaded to a subpath
+        of `tmpdir`, and the local filename is returned.  Various errors may be
+        raised if a problem occurs during downloading.
+        """
+        if not isinstance(spec, Requirement):
+            scheme = URL_SCHEME(spec)
+            if scheme:
+                # It's a url, download it to tmpdir
+                found = self._download_url(scheme.group(1), spec, tmpdir)
+                base, fragment = egg_info_for_url(spec)
+                if base.endswith('.py'):
+                    found = self.gen_setup(found, fragment, tmpdir)
+                return found
+            elif os.path.exists(spec):
+                # Existing file or directory, just return it
+                return spec
+            else:
+                spec = parse_requirement_arg(spec)
+        return getattr(self.fetch_distribution(spec, tmpdir), 'location', None)
+
+    def fetch_distribution(
+            self, requirement, tmpdir, force_scan=False, source=False,
+            develop_ok=False, local_index=None):
+        """Obtain a distribution suitable for fulfilling `requirement`
+
+        `requirement` must be a ``pkg_resources.Requirement`` instance.
+        If necessary, or if the `force_scan` flag is set, the requirement is
+        searched for in the (online) package index as well as the locally
+        installed packages.  If a distribution matching `requirement` is found,
+        the returned distribution's ``location`` is the value you would have
+        gotten from calling the ``download()`` method with the matching
+        distribution's URL or filename.  If no matching distribution is found,
+        ``None`` is returned.
+
+        If the `source` flag is set, only source distributions and source
+        checkout links will be considered.  Unless the `develop_ok` flag is
+        set, development and system eggs (i.e., those using the ``.egg-info``
+        format) will be ignored.
+        """
+        # process a Requirement
+        self.info("Searching for %s", requirement)
+        skipped = {}
+        dist = None
+
+        def find(req, env=None):
+            if env is None:
+                env = self
+            # Find a matching distribution; may be called more than once
+
+            for dist in env[req.key]:
+
+                if dist.precedence == DEVELOP_DIST and not develop_ok:
+                    if dist not in skipped:
+                        self.warn(
+                            "Skipping development or system egg: %s", dist,
+                        )
+                        skipped[dist] = 1
+                    continue
+
+                test = (
+                    dist in req
+                    and (dist.precedence <= SOURCE_DIST or not source)
+                )
+                if test:
+                    loc = self.download(dist.location, tmpdir)
+                    dist.download_location = loc
+                    if os.path.exists(dist.download_location):
+                        return dist
+
+        if force_scan:
+            self.prescan()
+            self.find_packages(requirement)
+            dist = find(requirement)
+
+        if not dist and local_index is not None:
+            dist = find(requirement, local_index)
+
+        if dist is None:
+            if self.to_scan is not None:
+                self.prescan()
+            dist = find(requirement)
+
+        if dist is None and not force_scan:
+            self.find_packages(requirement)
+            dist = find(requirement)
+
+        if dist is None:
+            self.warn(
+                "No local packages or working download links found for %s%s",
+                (source and "a source distribution of " or ""),
+                requirement,
+            )
+        else:
+            self.info("Best match: %s", dist)
+            return dist.clone(location=dist.download_location)
+
+    def fetch(self, requirement, tmpdir, force_scan=False, source=False):
+        """Obtain a file suitable for fulfilling `requirement`
+
+        DEPRECATED; use the ``fetch_distribution()`` method now instead.  For
+        backward compatibility, this routine is identical but returns the
+        ``location`` of the downloaded distribution instead of a distribution
+        object.
+        """
+        dist = self.fetch_distribution(requirement, tmpdir, force_scan, source)
+        if dist is not None:
+            return dist.location
+        return None
+
+    def gen_setup(self, filename, fragment, tmpdir):
+        match = EGG_FRAGMENT.match(fragment)
+        dists = match and [
+            d for d in
+            interpret_distro_name(filename, match.group(1), None) if d.version
+        ] or []
+
+        if len(dists) == 1:  # unambiguous ``#egg`` fragment
+            basename = os.path.basename(filename)
+
+            # Make sure the file has been downloaded to the temp dir.
+            if os.path.dirname(filename) != tmpdir:
+                dst = os.path.join(tmpdir, basename)
+                from setuptools.command.easy_install import samefile
+                if not samefile(filename, dst):
+                    shutil.copy2(filename, dst)
+                    filename = dst
+
+            with open(os.path.join(tmpdir, 'setup.py'), 'w') as file:
+                file.write(
+                    "from setuptools import setup\n"
+                    "setup(name=%r, version=%r, py_modules=[%r])\n"
+                    % (
+                        dists[0].project_name, dists[0].version,
+                        os.path.splitext(basename)[0]
+                    )
+                )
+            return filename
+
+        elif match:
+            raise DistutilsError(
+                "Can't unambiguously interpret project/version identifier %r; "
+                "any dashes in the name or version should be escaped using "
+                "underscores. %r" % (fragment, dists)
+            )
+        else:
+            raise DistutilsError(
+                "Can't process plain .py files without an '#egg=name-version'"
+                " suffix to enable automatic setup script generation."
+            )
+
+    dl_blocksize = 8192
+
+    def _download_to(self, url, filename):
+        self.info("Downloading %s", url)
+        # Download the file
+        fp = None
+        try:
+            checker = HashChecker.from_url(url)
+            fp = self.open_url(url)
+            if isinstance(fp, urllib.error.HTTPError):
+                raise DistutilsError(
+                    "Can't download %s: %s %s" % (url, fp.code, fp.msg)
+                )
+            headers = fp.info()
+            blocknum = 0
+            bs = self.dl_blocksize
+            size = -1
+            if "content-length" in headers:
+                # Some servers return multiple Content-Length headers :(
+                sizes = get_all_headers(headers, 'Content-Length')
+                size = max(map(int, sizes))
+                self.reporthook(url, filename, blocknum, bs, size)
+            with open(filename, 'wb') as tfp:
+                while True:
+                    block = fp.read(bs)
+                    if block:
+                        checker.feed(block)
+                        tfp.write(block)
+                        blocknum += 1
+                        self.reporthook(url, filename, blocknum, bs, size)
+                    else:
+                        break
+                self.check_hash(checker, filename, tfp)
+            return headers
+        finally:
+            if fp:
+                fp.close()
+
+    def reporthook(self, url, filename, blocknum, blksize, size):
+        pass  # no-op
+
+    def open_url(self, url, warning=None):
+        if url.startswith('file:'):
+            return local_open(url)
+        try:
+            return open_with_auth(url, self.opener)
+        except (ValueError, http_client.InvalidURL) as v:
+            msg = ' '.join([str(arg) for arg in v.args])
+            if warning:
+                self.warn(warning, msg)
+            else:
+                raise DistutilsError('%s %s' % (url, msg))
+        except urllib.error.HTTPError as v:
+            return v
+        except urllib.error.URLError as v:
+            if warning:
+                self.warn(warning, v.reason)
+            else:
+                raise DistutilsError("Download error for %s: %s"
+                                     % (url, v.reason))
+        except http_client.BadStatusLine as v:
+            if warning:
+                self.warn(warning, v.line)
+            else:
+                raise DistutilsError(
+                    '%s returned a bad status line. The server might be '
+                    'down, %s' %
+                    (url, v.line)
+                )
+        except (http_client.HTTPException, socket.error) as v:
+            if warning:
+                self.warn(warning, v)
+            else:
+                raise DistutilsError("Download error for %s: %s"
+                                     % (url, v))
+
+    def _download_url(self, scheme, url, tmpdir):
+        # Determine download filename
+        #
+        name, fragment = egg_info_for_url(url)
+        if name:
+            while '..' in name:
+                name = name.replace('..', '.').replace('\\', '_')
+        else:
+            name = "__downloaded__"  # default if URL has no path contents
+
+        if name.endswith('.egg.zip'):
+            name = name[:-4]  # strip the extra .zip before download
+
+        filename = os.path.join(tmpdir, name)
+
+        # Download the file
+        #
+        if scheme == 'svn' or scheme.startswith('svn+'):
+            return self._download_svn(url, filename)
+        elif scheme == 'git' or scheme.startswith('git+'):
+            return self._download_git(url, filename)
+        elif scheme.startswith('hg+'):
+            return self._download_hg(url, filename)
+        elif scheme == 'file':
+            return urllib.request.url2pathname(urllib.parse.urlparse(url)[2])
+        else:
+            self.url_ok(url, True)  # raises error if not allowed
+            return self._attempt_download(url, filename)
+
+    def scan_url(self, url):
+        self.process_url(url, True)
+
+    def _attempt_download(self, url, filename):
+        headers = self._download_to(url, filename)
+        if 'html' in headers.get('content-type', '').lower():
+            return self._download_html(url, headers, filename)
+        else:
+            return filename
+
+    def _download_html(self, url, headers, filename):
+        file = open(filename)
+        for line in file:
+            if line.strip():
+                # Check for a subversion index page
+                if re.search(r'<title>([^- ]+ - )?Revision \d+:', line):
+                    # it's a subversion index page:
+                    file.close()
+                    os.unlink(filename)
+                    return self._download_svn(url, filename)
+                break  # not an index page
+        file.close()
+        os.unlink(filename)
+        raise DistutilsError("Unexpected HTML page found at " + url)
+
+    def _download_svn(self, url, filename):
+        warnings.warn("SVN download support is deprecated", UserWarning)
+        url = url.split('#', 1)[0]  # remove any fragment for svn's sake
+        creds = ''
+        if url.lower().startswith('svn:') and '@' in url:
+            scheme, netloc, path, p, q, f = urllib.parse.urlparse(url)
+            if not netloc and path.startswith('//') and '/' in path[2:]:
+                netloc, path = path[2:].split('/', 1)
+                auth, host = _splituser(netloc)
+                if auth:
+                    if ':' in auth:
+                        user, pw = auth.split(':', 1)
+                        creds = " --username=%s --password=%s" % (user, pw)
+                    else:
+                        creds = " --username=" + auth
+                    netloc = host
+                    parts = scheme, netloc, url, p, q, f
+                    url = urllib.parse.urlunparse(parts)
+        self.info("Doing subversion checkout from %s to %s", url, filename)
+        os.system("svn checkout%s -q %s %s" % (creds, url, filename))
+        return filename
+
+    @staticmethod
+    def _vcs_split_rev_from_url(url, pop_prefix=False):
+        scheme, netloc, path, query, frag = urllib.parse.urlsplit(url)
+
+        scheme = scheme.split('+', 1)[-1]
+
+        # Some fragment identification fails
+        path = path.split('#', 1)[0]
+
+        rev = None
+        if '@' in path:
+            path, rev = path.rsplit('@', 1)
+
+        # Also, discard fragment
+        url = urllib.parse.urlunsplit((scheme, netloc, path, query, ''))
+
+        return url, rev
+
+    def _download_git(self, url, filename):
+        filename = filename.split('#', 1)[0]
+        url, rev = self._vcs_split_rev_from_url(url, pop_prefix=True)
+
+        self.info("Doing git clone from %s to %s", url, filename)
+        os.system("git clone --quiet %s %s" % (url, filename))
+
+        if rev is not None:
+            self.info("Checking out %s", rev)
+            os.system("git -C %s checkout --quiet %s" % (
+                filename,
+                rev,
+            ))
+
+        return filename
+
+    def _download_hg(self, url, filename):
+        filename = filename.split('#', 1)[0]
+        url, rev = self._vcs_split_rev_from_url(url, pop_prefix=True)
+
+        self.info("Doing hg clone from %s to %s", url, filename)
+        os.system("hg clone --quiet %s %s" % (url, filename))
+
+        if rev is not None:
+            self.info("Updating to %s", rev)
+            os.system("hg --cwd %s up -C -r %s -q" % (
+                filename,
+                rev,
+            ))
+
+        return filename
+
+    def debug(self, msg, *args):
+        log.debug(msg, *args)
+
+    def info(self, msg, *args):
+        log.info(msg, *args)
+
+    def warn(self, msg, *args):
+        log.warn(msg, *args)
+
+
+# This pattern matches a character entity reference (a decimal numeric
+# references, a hexadecimal numeric reference, or a named reference).
+entity_sub = re.compile(r'&(#(\d+|x[\da-fA-F]+)|[\w.:-]+);?').sub
+
+
+def decode_entity(match):
+    what = match.group(0)
+    return unescape(what)
+
+
+def htmldecode(text):
+    """
+    Decode HTML entities in the given text.
+
+    >>> htmldecode(
+    ...     'https://../package_name-0.1.2.tar.gz'
+    ...     '?tokena=A&amp;tokenb=B">package_name-0.1.2.tar.gz')
+    'https://../package_name-0.1.2.tar.gz?tokena=A&tokenb=B">package_name-0.1.2.tar.gz'
+    """
+    return entity_sub(decode_entity, text)
+
+
+def socket_timeout(timeout=15):
+    def _socket_timeout(func):
+        def _socket_timeout(*args, **kwargs):
+            old_timeout = socket.getdefaulttimeout()
+            socket.setdefaulttimeout(timeout)
+            try:
+                return func(*args, **kwargs)
+            finally:
+                socket.setdefaulttimeout(old_timeout)
+
+        return _socket_timeout
+
+    return _socket_timeout
+
+
+def _encode_auth(auth):
+    """
+    A function compatible with Python 2.3-3.3 that will encode
+    auth from a URL suitable for an HTTP header.
+    >>> str(_encode_auth('username%3Apassword'))
+    'dXNlcm5hbWU6cGFzc3dvcmQ='
+
+    Long auth strings should not cause a newline to be inserted.
+    >>> long_auth = 'username:' + 'password'*10
+    >>> chr(10) in str(_encode_auth(long_auth))
+    False
+    """
+    auth_s = urllib.parse.unquote(auth)
+    # convert to bytes
+    auth_bytes = auth_s.encode()
+    encoded_bytes = base64.b64encode(auth_bytes)
+    # convert back to a string
+    encoded = encoded_bytes.decode()
+    # strip the trailing carriage return
+    return encoded.replace('\n', '')
+
+
+class Credential:
+    """
+    A username/password pair. Use like a namedtuple.
+    """
+
+    def __init__(self, username, password):
+        self.username = username
+        self.password = password
+
+    def __iter__(self):
+        yield self.username
+        yield self.password
+
+    def __str__(self):
+        return '%(username)s:%(password)s' % vars(self)
+
+
+class PyPIConfig(configparser.RawConfigParser):
+    def __init__(self):
+        """
+        Load from ~/.pypirc
+        """
+        defaults = dict.fromkeys(['username', 'password', 'repository'], '')
+        configparser.RawConfigParser.__init__(self, defaults)
+
+        rc = os.path.join(os.path.expanduser('~'), '.pypirc')
+        if os.path.exists(rc):
+            self.read(rc)
+
+    @property
+    def creds_by_repository(self):
+        sections_with_repositories = [
+            section for section in self.sections()
+            if self.get(section, 'repository').strip()
+        ]
+
+        return dict(map(self._get_repo_cred, sections_with_repositories))
+
+    def _get_repo_cred(self, section):
+        repo = self.get(section, 'repository').strip()
+        return repo, Credential(
+            self.get(section, 'username').strip(),
+            self.get(section, 'password').strip(),
+        )
+
+    def find_credential(self, url):
+        """
+        If the URL indicated appears to be a repository defined in this
+        config, return the credential for that repository.
+        """
+        for repository, cred in self.creds_by_repository.items():
+            if url.startswith(repository):
+                return cred
+
+
+def open_with_auth(url, opener=urllib.request.urlopen):
+    """Open a urllib2 request, handling HTTP authentication"""
+
+    parsed = urllib.parse.urlparse(url)
+    scheme, netloc, path, params, query, frag = parsed
+
+    # Double scheme does not raise on Mac OS X as revealed by a
+    # failing test. We would expect "nonnumeric port". Refs #20.
+    if netloc.endswith(':'):
+        raise http_client.InvalidURL("nonnumeric port: ''")
+
+    if scheme in ('http', 'https'):
+        auth, address = _splituser(netloc)
+    else:
+        auth = None
+
+    if not auth:
+        cred = PyPIConfig().find_credential(url)
+        if cred:
+            auth = str(cred)
+            info = cred.username, url
+            log.info('Authenticating as %s for %s (from .pypirc)', *info)
+
+    if auth:
+        auth = "Basic " + _encode_auth(auth)
+        parts = scheme, address, path, params, query, frag
+        new_url = urllib.parse.urlunparse(parts)
+        request = urllib.request.Request(new_url)
+        request.add_header("Authorization", auth)
+    else:
+        request = urllib.request.Request(url)
+
+    request.add_header('User-Agent', user_agent)
+    fp = opener(request)
+
+    if auth:
+        # Put authentication info back into request URL if same host,
+        # so that links found on the page will work
+        s2, h2, path2, param2, query2, frag2 = urllib.parse.urlparse(fp.url)
+        if s2 == scheme and h2 == address:
+            parts = s2, netloc, path2, param2, query2, frag2
+            fp.url = urllib.parse.urlunparse(parts)
+
+    return fp
+
+
+# copy of urllib.parse._splituser from Python 3.8
+def _splituser(host):
+    """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
+    user, delim, host = host.rpartition('@')
+    return (user if delim else None), host
+
+
+# adding a timeout to avoid freezing package_index
+open_with_auth = socket_timeout(_SOCKET_TIMEOUT)(open_with_auth)
+
+
+def fix_sf_url(url):
+    return url  # backward compatibility
+
+
+def local_open(url):
+    """Read a local path, with special support for directories"""
+    scheme, server, path, param, query, frag = urllib.parse.urlparse(url)
+    filename = urllib.request.url2pathname(path)
+    if os.path.isfile(filename):
+        return urllib.request.urlopen(url)
+    elif path.endswith('/') and os.path.isdir(filename):
+        files = []
+        for f in os.listdir(filename):
+            filepath = os.path.join(filename, f)
+            if f == 'index.html':
+                with open(filepath, 'r') as fp:
+                    body = fp.read()
+                break
+            elif os.path.isdir(filepath):
+                f += '/'
+            files.append('<a href="{name}">{name}</a>'.format(name=f))
+        else:
+            tmpl = (
+                "<html><head><title>{url}</title>"
+                "</head><body>{files}</body></html>")
+            body = tmpl.format(url=url, files='\n'.join(files))
+        status, message = 200, "OK"
+    else:
+        status, message, body = 404, "Path not found", "Not found"
+
+    headers = {'content-type': 'text/html'}
+    body_stream = six.StringIO(body)
+    return urllib.error.HTTPError(url, status, message, headers, body_stream)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/pep425tags.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/pep425tags.py
new file mode 100644
index 0000000..48745a2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/pep425tags.py
@@ -0,0 +1,319 @@
+# This file originally from pip:
+# https://github.com/pypa/pip/blob/8f4f15a5a95d7d5b511ceaee9ed261176c181970/src/pip/_internal/pep425tags.py
+"""Generate and work with PEP 425 Compatibility Tags."""
+from __future__ import absolute_import
+
+import distutils.util
+from distutils import log
+import platform
+import re
+import sys
+import sysconfig
+import warnings
+from collections import OrderedDict
+
+from .extern import six
+
+from . import glibc
+
+_osx_arch_pat = re.compile(r'(.+)_(\d+)_(\d+)_(.+)')
+
+
+def get_config_var(var):
+    try:
+        return sysconfig.get_config_var(var)
+    except IOError as e:  # Issue #1074
+        warnings.warn("{}".format(e), RuntimeWarning)
+        return None
+
+
+def get_abbr_impl():
+    """Return abbreviated implementation name."""
+    if hasattr(sys, 'pypy_version_info'):
+        pyimpl = 'pp'
+    elif sys.platform.startswith('java'):
+        pyimpl = 'jy'
+    elif sys.platform == 'cli':
+        pyimpl = 'ip'
+    else:
+        pyimpl = 'cp'
+    return pyimpl
+
+
+def get_impl_ver():
+    """Return implementation version."""
+    impl_ver = get_config_var("py_version_nodot")
+    if not impl_ver or get_abbr_impl() == 'pp':
+        impl_ver = ''.join(map(str, get_impl_version_info()))
+    return impl_ver
+
+
+def get_impl_version_info():
+    """Return sys.version_info-like tuple for use in decrementing the minor
+    version."""
+    if get_abbr_impl() == 'pp':
+        # as per https://github.com/pypa/pip/issues/2882
+        return (sys.version_info[0], sys.pypy_version_info.major,
+                sys.pypy_version_info.minor)
+    else:
+        return sys.version_info[0], sys.version_info[1]
+
+
+def get_impl_tag():
+    """
+    Returns the Tag for this specific implementation.
+    """
+    return "{}{}".format(get_abbr_impl(), get_impl_ver())
+
+
+def get_flag(var, fallback, expected=True, warn=True):
+    """Use a fallback method for determining SOABI flags if the needed config
+    var is unset or unavailable."""
+    val = get_config_var(var)
+    if val is None:
+        if warn:
+            log.debug("Config variable '%s' is unset, Python ABI tag may "
+                      "be incorrect", var)
+        return fallback()
+    return val == expected
+
+
+def get_abi_tag():
+    """Return the ABI tag based on SOABI (if available) or emulate SOABI
+    (CPython 2, PyPy)."""
+    soabi = get_config_var('SOABI')
+    impl = get_abbr_impl()
+    if not soabi and impl in {'cp', 'pp'} and hasattr(sys, 'maxunicode'):
+        d = ''
+        m = ''
+        u = ''
+        if get_flag('Py_DEBUG',
+                    lambda: hasattr(sys, 'gettotalrefcount'),
+                    warn=(impl == 'cp')):
+            d = 'd'
+        if get_flag('WITH_PYMALLOC',
+                    lambda: impl == 'cp',
+                    warn=(impl == 'cp')):
+            m = 'm'
+        if get_flag('Py_UNICODE_SIZE',
+                    lambda: sys.maxunicode == 0x10ffff,
+                    expected=4,
+                    warn=(impl == 'cp' and
+                          six.PY2)) \
+                and six.PY2:
+            u = 'u'
+        abi = '%s%s%s%s%s' % (impl, get_impl_ver(), d, m, u)
+    elif soabi and soabi.startswith('cpython-'):
+        abi = 'cp' + soabi.split('-')[1]
+    elif soabi:
+        abi = soabi.replace('.', '_').replace('-', '_')
+    else:
+        abi = None
+    return abi
+
+
+def _is_running_32bit():
+    return sys.maxsize == 2147483647
+
+
+def get_platform():
+    """Return our platform name 'win32', 'linux_x86_64'"""
+    if sys.platform == 'darwin':
+        # distutils.util.get_platform() returns the release based on the value
+        # of MACOSX_DEPLOYMENT_TARGET on which Python was built, which may
+        # be significantly older than the user's current machine.
+        release, _, machine = platform.mac_ver()
+        split_ver = release.split('.')
+
+        if machine == "x86_64" and _is_running_32bit():
+            machine = "i386"
+        elif machine == "ppc64" and _is_running_32bit():
+            machine = "ppc"
+
+        return 'macosx_{}_{}_{}'.format(split_ver[0], split_ver[1], machine)
+
+    # XXX remove distutils dependency
+    result = distutils.util.get_platform().replace('.', '_').replace('-', '_')
+    if result == "linux_x86_64" and _is_running_32bit():
+        # 32 bit Python program (running on a 64 bit Linux): pip should only
+        # install and run 32 bit compiled extensions in that case.
+        result = "linux_i686"
+
+    return result
+
+
+def is_manylinux1_compatible():
+    # Only Linux, and only x86-64 / i686
+    if get_platform() not in {"linux_x86_64", "linux_i686"}:
+        return False
+
+    # Check for presence of _manylinux module
+    try:
+        import _manylinux
+        return bool(_manylinux.manylinux1_compatible)
+    except (ImportError, AttributeError):
+        # Fall through to heuristic check below
+        pass
+
+    # Check glibc version. CentOS 5 uses glibc 2.5.
+    return glibc.have_compatible_glibc(2, 5)
+
+
+def get_darwin_arches(major, minor, machine):
+    """Return a list of supported arches (including group arches) for
+    the given major, minor and machine architecture of a macOS machine.
+    """
+    arches = []
+
+    def _supports_arch(major, minor, arch):
+        # Looking at the application support for macOS versions in the chart
+        # provided by https://en.wikipedia.org/wiki/OS_X#Versions it appears
+        # our timeline looks roughly like:
+        #
+        # 10.0 - Introduces ppc support.
+        # 10.4 - Introduces ppc64, i386, and x86_64 support, however the ppc64
+        #        and x86_64 support is CLI only, and cannot be used for GUI
+        #        applications.
+        # 10.5 - Extends ppc64 and x86_64 support to cover GUI applications.
+        # 10.6 - Drops support for ppc64
+        # 10.7 - Drops support for ppc
+        #
+        # Given that we do not know if we're installing a CLI or a GUI
+        # application, we must be conservative and assume it might be a GUI
+        # application and behave as if ppc64 and x86_64 support did not occur
+        # until 10.5.
+        #
+        # Note: The above information is taken from the "Application support"
+        #       column in the chart not the "Processor support" since I believe
+        #       that we care about what instruction sets an application can use
+        #       not which processors the OS supports.
+        if arch == 'ppc':
+            return (major, minor) <= (10, 5)
+        if arch == 'ppc64':
+            return (major, minor) == (10, 5)
+        if arch == 'i386':
+            return (major, minor) >= (10, 4)
+        if arch == 'x86_64':
+            return (major, minor) >= (10, 5)
+        if arch in groups:
+            for garch in groups[arch]:
+                if _supports_arch(major, minor, garch):
+                    return True
+        return False
+
+    groups = OrderedDict([
+        ("fat", ("i386", "ppc")),
+        ("intel", ("x86_64", "i386")),
+        ("fat64", ("x86_64", "ppc64")),
+        ("fat32", ("x86_64", "i386", "ppc")),
+    ])
+
+    if _supports_arch(major, minor, machine):
+        arches.append(machine)
+
+    for garch in groups:
+        if machine in groups[garch] and _supports_arch(major, minor, garch):
+            arches.append(garch)
+
+    arches.append('universal')
+
+    return arches
+
+
+def get_supported(versions=None, noarch=False, platform=None,
+                  impl=None, abi=None):
+    """Return a list of supported tags for each version specified in
+    `versions`.
+
+    :param versions: a list of string versions, of the form ["33", "32"],
+        or None. The first version will be assumed to support our ABI.
+    :param platform: specify the exact platform you want valid
+        tags for, or None. If None, use the local system platform.
+    :param impl: specify the exact implementation you want valid
+        tags for, or None. If None, use the local interpreter impl.
+    :param abi: specify the exact abi you want valid
+        tags for, or None. If None, use the local interpreter abi.
+    """
+    supported = []
+
+    # Versions must be given with respect to the preference
+    if versions is None:
+        versions = []
+        version_info = get_impl_version_info()
+        major = version_info[:-1]
+        # Support all previous minor Python versions.
+        for minor in range(version_info[-1], -1, -1):
+            versions.append(''.join(map(str, major + (minor,))))
+
+    impl = impl or get_abbr_impl()
+
+    abis = []
+
+    abi = abi or get_abi_tag()
+    if abi:
+        abis[0:0] = [abi]
+
+    abi3s = set()
+    import imp
+    for suffix in imp.get_suffixes():
+        if suffix[0].startswith('.abi'):
+            abi3s.add(suffix[0].split('.', 2)[1])
+
+    abis.extend(sorted(list(abi3s)))
+
+    abis.append('none')
+
+    if not noarch:
+        arch = platform or get_platform()
+        if arch.startswith('macosx'):
+            # support macosx-10.6-intel on macosx-10.9-x86_64
+            match = _osx_arch_pat.match(arch)
+            if match:
+                name, major, minor, actual_arch = match.groups()
+                tpl = '{}_{}_%i_%s'.format(name, major)
+                arches = []
+                for m in reversed(range(int(minor) + 1)):
+                    for a in get_darwin_arches(int(major), m, actual_arch):
+                        arches.append(tpl % (m, a))
+            else:
+                # arch pattern didn't match (?!)
+                arches = [arch]
+        elif platform is None and is_manylinux1_compatible():
+            arches = [arch.replace('linux', 'manylinux1'), arch]
+        else:
+            arches = [arch]
+
+        # Current version, current API (built specifically for our Python):
+        for abi in abis:
+            for arch in arches:
+                supported.append(('%s%s' % (impl, versions[0]), abi, arch))
+
+        # abi3 modules compatible with older version of Python
+        for version in versions[1:]:
+            # abi3 was introduced in Python 3.2
+            if version in {'31', '30'}:
+                break
+            for abi in abi3s:   # empty set if not Python 3
+                for arch in arches:
+                    supported.append(("%s%s" % (impl, version), abi, arch))
+
+        # Has binaries, does not use the Python API:
+        for arch in arches:
+            supported.append(('py%s' % (versions[0][0]), 'none', arch))
+
+    # No abi / arch, but requires our implementation:
+    supported.append(('%s%s' % (impl, versions[0]), 'none', 'any'))
+    # Tagged specifically as being cross-version compatible
+    # (with just the major version specified)
+    supported.append(('%s%s' % (impl, versions[0][0]), 'none', 'any'))
+
+    # No abi / arch, generic Python
+    for i, version in enumerate(versions):
+        supported.append(('py%s' % (version,), 'none', 'any'))
+        if i == 0:
+            supported.append(('py%s' % (version[0]), 'none', 'any'))
+
+    return supported
+
+
+implementation_tag = get_impl_tag()
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/py27compat.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/py27compat.py
new file mode 100644
index 0000000..1d57360
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/py27compat.py
@@ -0,0 +1,60 @@
+"""
+Compatibility Support for Python 2.7 and earlier
+"""
+
+import sys
+import platform
+
+from setuptools.extern import six
+
+
+def get_all_headers(message, key):
+    """
+    Given an HTTPMessage, return all headers matching a given key.
+    """
+    return message.get_all(key)
+
+
+if six.PY2:
+    def get_all_headers(message, key):
+        return message.getheaders(key)
+
+
+linux_py2_ascii = (
+    platform.system() == 'Linux' and
+    six.PY2
+)
+
+rmtree_safe = str if linux_py2_ascii else lambda x: x
+"""Workaround for http://bugs.python.org/issue24672"""
+
+
+try:
+    from ._imp import find_module, PY_COMPILED, PY_FROZEN, PY_SOURCE
+    from ._imp import get_frozen_object, get_module
+except ImportError:
+    import imp
+    from imp import PY_COMPILED, PY_FROZEN, PY_SOURCE  # noqa
+
+    def find_module(module, paths=None):
+        """Just like 'imp.find_module()', but with package support"""
+        parts = module.split('.')
+        while parts:
+            part = parts.pop(0)
+            f, path, (suffix, mode, kind) = info = imp.find_module(part, paths)
+
+            if kind == imp.PKG_DIRECTORY:
+                parts = parts or ['__init__']
+                paths = [path]
+
+            elif parts:
+                raise ImportError("Can't find %r in %s" % (parts, module))
+
+        return info
+
+    def get_frozen_object(module, paths):
+        return imp.get_frozen_object(module)
+
+    def get_module(module, paths, info):
+        imp.load_module(module, *info)
+        return sys.modules[module]
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/py31compat.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/py31compat.py
new file mode 100644
index 0000000..e1da7ee
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/py31compat.py
@@ -0,0 +1,32 @@
+__all__ = []
+
+__metaclass__ = type
+
+
+try:
+    # Python >=3.2
+    from tempfile import TemporaryDirectory
+except ImportError:
+    import shutil
+    import tempfile
+
+    class TemporaryDirectory:
+        """
+        Very simple temporary directory context manager.
+        Will try to delete afterward, but will also ignore OS and similar
+        errors on deletion.
+        """
+
+        def __init__(self, **kwargs):
+            self.name = None  # Handle mkdtemp raising an exception
+            self.name = tempfile.mkdtemp(**kwargs)
+
+        def __enter__(self):
+            return self.name
+
+        def __exit__(self, exctype, excvalue, exctrace):
+            try:
+                shutil.rmtree(self.name, True)
+            except OSError:  # removal errors are not the only possible
+                pass
+            self.name = None
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/py33compat.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/py33compat.py
new file mode 100644
index 0000000..cb69443
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/py33compat.py
@@ -0,0 +1,59 @@
+import dis
+import array
+import collections
+
+try:
+    import html
+except ImportError:
+    html = None
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import html_parser
+
+__metaclass__ = type
+
+OpArg = collections.namedtuple('OpArg', 'opcode arg')
+
+
+class Bytecode_compat:
+    def __init__(self, code):
+        self.code = code
+
+    def __iter__(self):
+        """Yield '(op,arg)' pair for each operation in code object 'code'"""
+
+        bytes = array.array('b', self.code.co_code)
+        eof = len(self.code.co_code)
+
+        ptr = 0
+        extended_arg = 0
+
+        while ptr < eof:
+
+            op = bytes[ptr]
+
+            if op >= dis.HAVE_ARGUMENT:
+
+                arg = bytes[ptr + 1] + bytes[ptr + 2] * 256 + extended_arg
+                ptr += 3
+
+                if op == dis.EXTENDED_ARG:
+                    long_type = six.integer_types[-1]
+                    extended_arg = arg * long_type(65536)
+                    continue
+
+            else:
+                arg = None
+                ptr += 1
+
+            yield OpArg(op, arg)
+
+
+Bytecode = getattr(dis, 'Bytecode', Bytecode_compat)
+
+
+unescape = getattr(html, 'unescape', None)
+if unescape is None:
+    # HTMLParser.unescape is deprecated since Python 3.4, and will be removed
+    # from 3.9.
+    unescape = html_parser.HTMLParser().unescape
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/py34compat.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/py34compat.py
new file mode 100644
index 0000000..3ad9172
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/py34compat.py
@@ -0,0 +1,13 @@
+import importlib
+
+try:
+    import importlib.util
+except ImportError:
+    pass
+
+
+try:
+    module_from_spec = importlib.util.module_from_spec
+except AttributeError:
+    def module_from_spec(spec):
+        return spec.loader.load_module(spec.name)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/sandbox.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/sandbox.py
new file mode 100644
index 0000000..685f3f7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/sandbox.py
@@ -0,0 +1,491 @@
+import os
+import sys
+import tempfile
+import operator
+import functools
+import itertools
+import re
+import contextlib
+import pickle
+import textwrap
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import builtins, map
+
+import pkg_resources.py31compat
+
+if sys.platform.startswith('java'):
+    import org.python.modules.posix.PosixModule as _os
+else:
+    _os = sys.modules[os.name]
+try:
+    _file = file
+except NameError:
+    _file = None
+_open = open
+from distutils.errors import DistutilsError
+from pkg_resources import working_set
+
+
+__all__ = [
+    "AbstractSandbox", "DirectorySandbox", "SandboxViolation", "run_setup",
+]
+
+
+def _execfile(filename, globals, locals=None):
+    """
+    Python 3 implementation of execfile.
+    """
+    mode = 'rb'
+    with open(filename, mode) as stream:
+        script = stream.read()
+    if locals is None:
+        locals = globals
+    code = compile(script, filename, 'exec')
+    exec(code, globals, locals)
+
+
+@contextlib.contextmanager
+def save_argv(repl=None):
+    saved = sys.argv[:]
+    if repl is not None:
+        sys.argv[:] = repl
+    try:
+        yield saved
+    finally:
+        sys.argv[:] = saved
+
+
+@contextlib.contextmanager
+def save_path():
+    saved = sys.path[:]
+    try:
+        yield saved
+    finally:
+        sys.path[:] = saved
+
+
+@contextlib.contextmanager
+def override_temp(replacement):
+    """
+    Monkey-patch tempfile.tempdir with replacement, ensuring it exists
+    """
+    pkg_resources.py31compat.makedirs(replacement, exist_ok=True)
+
+    saved = tempfile.tempdir
+
+    tempfile.tempdir = replacement
+
+    try:
+        yield
+    finally:
+        tempfile.tempdir = saved
+
+
+@contextlib.contextmanager
+def pushd(target):
+    saved = os.getcwd()
+    os.chdir(target)
+    try:
+        yield saved
+    finally:
+        os.chdir(saved)
+
+
+class UnpickleableException(Exception):
+    """
+    An exception representing another Exception that could not be pickled.
+    """
+
+    @staticmethod
+    def dump(type, exc):
+        """
+        Always return a dumped (pickled) type and exc. If exc can't be pickled,
+        wrap it in UnpickleableException first.
+        """
+        try:
+            return pickle.dumps(type), pickle.dumps(exc)
+        except Exception:
+            # get UnpickleableException inside the sandbox
+            from setuptools.sandbox import UnpickleableException as cls
+            return cls.dump(cls, cls(repr(exc)))
+
+
+class ExceptionSaver:
+    """
+    A Context Manager that will save an exception, serialized, and restore it
+    later.
+    """
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, type, exc, tb):
+        if not exc:
+            return
+
+        # dump the exception
+        self._saved = UnpickleableException.dump(type, exc)
+        self._tb = tb
+
+        # suppress the exception
+        return True
+
+    def resume(self):
+        "restore and re-raise any exception"
+
+        if '_saved' not in vars(self):
+            return
+
+        type, exc = map(pickle.loads, self._saved)
+        six.reraise(type, exc, self._tb)
+
+
+@contextlib.contextmanager
+def save_modules():
+    """
+    Context in which imported modules are saved.
+
+    Translates exceptions internal to the context into the equivalent exception
+    outside the context.
+    """
+    saved = sys.modules.copy()
+    with ExceptionSaver() as saved_exc:
+        yield saved
+
+    sys.modules.update(saved)
+    # remove any modules imported since
+    del_modules = (
+        mod_name for mod_name in sys.modules
+        if mod_name not in saved
+        # exclude any encodings modules. See #285
+        and not mod_name.startswith('encodings.')
+    )
+    _clear_modules(del_modules)
+
+    saved_exc.resume()
+
+
+def _clear_modules(module_names):
+    for mod_name in list(module_names):
+        del sys.modules[mod_name]
+
+
+@contextlib.contextmanager
+def save_pkg_resources_state():
+    saved = pkg_resources.__getstate__()
+    try:
+        yield saved
+    finally:
+        pkg_resources.__setstate__(saved)
+
+
+@contextlib.contextmanager
+def setup_context(setup_dir):
+    temp_dir = os.path.join(setup_dir, 'temp')
+    with save_pkg_resources_state():
+        with save_modules():
+            hide_setuptools()
+            with save_path():
+                with save_argv():
+                    with override_temp(temp_dir):
+                        with pushd(setup_dir):
+                            # ensure setuptools commands are available
+                            __import__('setuptools')
+                            yield
+
+
+def _needs_hiding(mod_name):
+    """
+    >>> _needs_hiding('setuptools')
+    True
+    >>> _needs_hiding('pkg_resources')
+    True
+    >>> _needs_hiding('setuptools_plugin')
+    False
+    >>> _needs_hiding('setuptools.__init__')
+    True
+    >>> _needs_hiding('distutils')
+    True
+    >>> _needs_hiding('os')
+    False
+    >>> _needs_hiding('Cython')
+    True
+    """
+    pattern = re.compile(r'(setuptools|pkg_resources|distutils|Cython)(\.|$)')
+    return bool(pattern.match(mod_name))
+
+
+def hide_setuptools():
+    """
+    Remove references to setuptools' modules from sys.modules to allow the
+    invocation to import the most appropriate setuptools. This technique is
+    necessary to avoid issues such as #315 where setuptools upgrading itself
+    would fail to find a function declared in the metadata.
+    """
+    modules = filter(_needs_hiding, sys.modules)
+    _clear_modules(modules)
+
+
+def run_setup(setup_script, args):
+    """Run a distutils setup script, sandboxed in its directory"""
+    setup_dir = os.path.abspath(os.path.dirname(setup_script))
+    with setup_context(setup_dir):
+        try:
+            sys.argv[:] = [setup_script] + list(args)
+            sys.path.insert(0, setup_dir)
+            # reset to include setup dir, w/clean callback list
+            working_set.__init__()
+            working_set.callbacks.append(lambda dist: dist.activate())
+
+            # __file__ should be a byte string on Python 2 (#712)
+            dunder_file = (
+                setup_script
+                if isinstance(setup_script, str) else
+                setup_script.encode(sys.getfilesystemencoding())
+            )
+
+            with DirectorySandbox(setup_dir):
+                ns = dict(__file__=dunder_file, __name__='__main__')
+                _execfile(setup_script, ns)
+        except SystemExit as v:
+            if v.args and v.args[0]:
+                raise
+            # Normal exit, just return
+
+
+class AbstractSandbox:
+    """Wrap 'os' module and 'open()' builtin for virtualizing setup scripts"""
+
+    _active = False
+
+    def __init__(self):
+        self._attrs = [
+            name for name in dir(_os)
+            if not name.startswith('_') and hasattr(self, name)
+        ]
+
+    def _copy(self, source):
+        for name in self._attrs:
+            setattr(os, name, getattr(source, name))
+
+    def __enter__(self):
+        self._copy(self)
+        if _file:
+            builtins.file = self._file
+        builtins.open = self._open
+        self._active = True
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self._active = False
+        if _file:
+            builtins.file = _file
+        builtins.open = _open
+        self._copy(_os)
+
+    def run(self, func):
+        """Run 'func' under os sandboxing"""
+        with self:
+            return func()
+
+    def _mk_dual_path_wrapper(name):
+        original = getattr(_os, name)
+
+        def wrap(self, src, dst, *args, **kw):
+            if self._active:
+                src, dst = self._remap_pair(name, src, dst, *args, **kw)
+            return original(src, dst, *args, **kw)
+
+        return wrap
+
+    for name in ["rename", "link", "symlink"]:
+        if hasattr(_os, name):
+            locals()[name] = _mk_dual_path_wrapper(name)
+
+    def _mk_single_path_wrapper(name, original=None):
+        original = original or getattr(_os, name)
+
+        def wrap(self, path, *args, **kw):
+            if self._active:
+                path = self._remap_input(name, path, *args, **kw)
+            return original(path, *args, **kw)
+
+        return wrap
+
+    if _file:
+        _file = _mk_single_path_wrapper('file', _file)
+    _open = _mk_single_path_wrapper('open', _open)
+    for name in [
+        "stat", "listdir", "chdir", "open", "chmod", "chown", "mkdir",
+        "remove", "unlink", "rmdir", "utime", "lchown", "chroot", "lstat",
+        "startfile", "mkfifo", "mknod", "pathconf", "access"
+    ]:
+        if hasattr(_os, name):
+            locals()[name] = _mk_single_path_wrapper(name)
+
+    def _mk_single_with_return(name):
+        original = getattr(_os, name)
+
+        def wrap(self, path, *args, **kw):
+            if self._active:
+                path = self._remap_input(name, path, *args, **kw)
+                return self._remap_output(name, original(path, *args, **kw))
+            return original(path, *args, **kw)
+
+        return wrap
+
+    for name in ['readlink', 'tempnam']:
+        if hasattr(_os, name):
+            locals()[name] = _mk_single_with_return(name)
+
+    def _mk_query(name):
+        original = getattr(_os, name)
+
+        def wrap(self, *args, **kw):
+            retval = original(*args, **kw)
+            if self._active:
+                return self._remap_output(name, retval)
+            return retval
+
+        return wrap
+
+    for name in ['getcwd', 'tmpnam']:
+        if hasattr(_os, name):
+            locals()[name] = _mk_query(name)
+
+    def _validate_path(self, path):
+        """Called to remap or validate any path, whether input or output"""
+        return path
+
+    def _remap_input(self, operation, path, *args, **kw):
+        """Called for path inputs"""
+        return self._validate_path(path)
+
+    def _remap_output(self, operation, path):
+        """Called for path outputs"""
+        return self._validate_path(path)
+
+    def _remap_pair(self, operation, src, dst, *args, **kw):
+        """Called for path pairs like rename, link, and symlink operations"""
+        return (
+            self._remap_input(operation + '-from', src, *args, **kw),
+            self._remap_input(operation + '-to', dst, *args, **kw)
+        )
+
+
+if hasattr(os, 'devnull'):
+    _EXCEPTIONS = [os.devnull,]
+else:
+    _EXCEPTIONS = []
+
+
+class DirectorySandbox(AbstractSandbox):
+    """Restrict operations to a single subdirectory - pseudo-chroot"""
+
+    write_ops = dict.fromkeys([
+        "open", "chmod", "chown", "mkdir", "remove", "unlink", "rmdir",
+        "utime", "lchown", "chroot", "mkfifo", "mknod", "tempnam",
+    ])
+
+    _exception_patterns = [
+        # Allow lib2to3 to attempt to save a pickled grammar object (#121)
+        r'.*lib2to3.*\.pickle$',
+    ]
+    "exempt writing to paths that match the pattern"
+
+    def __init__(self, sandbox, exceptions=_EXCEPTIONS):
+        self._sandbox = os.path.normcase(os.path.realpath(sandbox))
+        self._prefix = os.path.join(self._sandbox, '')
+        self._exceptions = [
+            os.path.normcase(os.path.realpath(path))
+            for path in exceptions
+        ]
+        AbstractSandbox.__init__(self)
+
+    def _violation(self, operation, *args, **kw):
+        from setuptools.sandbox import SandboxViolation
+        raise SandboxViolation(operation, args, kw)
+
+    if _file:
+
+        def _file(self, path, mode='r', *args, **kw):
+            if mode not in ('r', 'rt', 'rb', 'rU', 'U') and not self._ok(path):
+                self._violation("file", path, mode, *args, **kw)
+            return _file(path, mode, *args, **kw)
+
+    def _open(self, path, mode='r', *args, **kw):
+        if mode not in ('r', 'rt', 'rb', 'rU', 'U') and not self._ok(path):
+            self._violation("open", path, mode, *args, **kw)
+        return _open(path, mode, *args, **kw)
+
+    def tmpnam(self):
+        self._violation("tmpnam")
+
+    def _ok(self, path):
+        active = self._active
+        try:
+            self._active = False
+            realpath = os.path.normcase(os.path.realpath(path))
+            return (
+                self._exempted(realpath)
+                or realpath == self._sandbox
+                or realpath.startswith(self._prefix)
+            )
+        finally:
+            self._active = active
+
+    def _exempted(self, filepath):
+        start_matches = (
+            filepath.startswith(exception)
+            for exception in self._exceptions
+        )
+        pattern_matches = (
+            re.match(pattern, filepath)
+            for pattern in self._exception_patterns
+        )
+        candidates = itertools.chain(start_matches, pattern_matches)
+        return any(candidates)
+
+    def _remap_input(self, operation, path, *args, **kw):
+        """Called for path inputs"""
+        if operation in self.write_ops and not self._ok(path):
+            self._violation(operation, os.path.realpath(path), *args, **kw)
+        return path
+
+    def _remap_pair(self, operation, src, dst, *args, **kw):
+        """Called for path pairs like rename, link, and symlink operations"""
+        if not self._ok(src) or not self._ok(dst):
+            self._violation(operation, src, dst, *args, **kw)
+        return (src, dst)
+
+    def open(self, file, flags, mode=0o777, *args, **kw):
+        """Called for low-level os.open()"""
+        if flags & WRITE_FLAGS and not self._ok(file):
+            self._violation("os.open", file, flags, mode, *args, **kw)
+        return _os.open(file, flags, mode, *args, **kw)
+
+
+WRITE_FLAGS = functools.reduce(
+    operator.or_, [getattr(_os, a, 0) for a in
+        "O_WRONLY O_RDWR O_APPEND O_CREAT O_TRUNC O_TEMPORARY".split()]
+)
+
+
+class SandboxViolation(DistutilsError):
+    """A setup script attempted to modify the filesystem outside the sandbox"""
+
+    tmpl = textwrap.dedent("""
+        SandboxViolation: {cmd}{args!r} {kwargs}
+
+        The package setup script has attempted to modify files on your system
+        that are not within the EasyInstall build area, and has been aborted.
+
+        This package cannot be safely installed by EasyInstall, and may not
+        support alternate installation locations even if you run its setup
+        script by hand.  Please inform the package's author and the EasyInstall
+        maintainers to find out if a fix or workaround is available.
+        """).lstrip()
+
+    def __str__(self):
+        cmd, args, kwargs = self.args
+        return self.tmpl.format(**locals())
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/script (dev).tmpl b/python3-vckonline/lib/python3.8/site-packages/setuptools/script (dev).tmpl
new file mode 100644
index 0000000..39a24b0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/script (dev).tmpl	
@@ -0,0 +1,6 @@
+# EASY-INSTALL-DEV-SCRIPT: %(spec)r,%(script_name)r
+__requires__ = %(spec)r
+__import__('pkg_resources').require(%(spec)r)
+__file__ = %(dev_path)r
+with open(__file__) as f:
+    exec(compile(f.read(), __file__, 'exec'))
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/script.tmpl b/python3-vckonline/lib/python3.8/site-packages/setuptools/script.tmpl
new file mode 100644
index 0000000..ff5efbc
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/script.tmpl
@@ -0,0 +1,3 @@
+# EASY-INSTALL-SCRIPT: %(spec)r,%(script_name)r
+__requires__ = %(spec)r
+__import__('pkg_resources').run_script(%(spec)r, %(script_name)r)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/site-patch.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/site-patch.py
new file mode 100644
index 0000000..40b00de
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/site-patch.py
@@ -0,0 +1,74 @@
+def __boot():
+    import sys
+    import os
+    PYTHONPATH = os.environ.get('PYTHONPATH')
+    if PYTHONPATH is None or (sys.platform == 'win32' and not PYTHONPATH):
+        PYTHONPATH = []
+    else:
+        PYTHONPATH = PYTHONPATH.split(os.pathsep)
+
+    pic = getattr(sys, 'path_importer_cache', {})
+    stdpath = sys.path[len(PYTHONPATH):]
+    mydir = os.path.dirname(__file__)
+
+    for item in stdpath:
+        if item == mydir or not item:
+            continue  # skip if current dir. on Windows, or my own directory
+        importer = pic.get(item)
+        if importer is not None:
+            loader = importer.find_module('site')
+            if loader is not None:
+                # This should actually reload the current module
+                loader.load_module('site')
+                break
+        else:
+            try:
+                import imp  # Avoid import loop in Python 3
+                stream, path, descr = imp.find_module('site', [item])
+            except ImportError:
+                continue
+            if stream is None:
+                continue
+            try:
+                # This should actually reload the current module
+                imp.load_module('site', stream, path, descr)
+            finally:
+                stream.close()
+            break
+    else:
+        raise ImportError("Couldn't find the real 'site' module")
+
+    known_paths = dict([(makepath(item)[1], 1) for item in sys.path])  # 2.2 comp
+
+    oldpos = getattr(sys, '__egginsert', 0)  # save old insertion position
+    sys.__egginsert = 0  # and reset the current one
+
+    for item in PYTHONPATH:
+        addsitedir(item)
+
+    sys.__egginsert += oldpos  # restore effective old position
+
+    d, nd = makepath(stdpath[0])
+    insert_at = None
+    new_path = []
+
+    for item in sys.path:
+        p, np = makepath(item)
+
+        if np == nd and insert_at is None:
+            # We've hit the first 'system' path entry, so added entries go here
+            insert_at = len(new_path)
+
+        if np in known_paths or insert_at is None:
+            new_path.append(item)
+        else:
+            # new path after the insert point, back-insert it
+            new_path.insert(insert_at, item)
+            insert_at += 1
+
+    sys.path[:] = new_path
+
+
+if __name__ == 'site':
+    __boot()
+    del __boot
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/ssl_support.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/ssl_support.py
new file mode 100644
index 0000000..226db69
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/ssl_support.py
@@ -0,0 +1,260 @@
+import os
+import socket
+import atexit
+import re
+import functools
+
+from setuptools.extern.six.moves import urllib, http_client, map, filter
+
+from pkg_resources import ResolutionError, ExtractionError
+
+try:
+    import ssl
+except ImportError:
+    ssl = None
+
+__all__ = [
+    'VerifyingHTTPSHandler', 'find_ca_bundle', 'is_available', 'cert_paths',
+    'opener_for'
+]
+
+cert_paths = """
+/etc/pki/tls/certs/ca-bundle.crt
+/etc/ssl/certs/ca-certificates.crt
+/usr/share/ssl/certs/ca-bundle.crt
+/usr/local/share/certs/ca-root.crt
+/etc/ssl/cert.pem
+/System/Library/OpenSSL/certs/cert.pem
+/usr/local/share/certs/ca-root-nss.crt
+/etc/ssl/ca-bundle.pem
+""".strip().split()
+
+try:
+    HTTPSHandler = urllib.request.HTTPSHandler
+    HTTPSConnection = http_client.HTTPSConnection
+except AttributeError:
+    HTTPSHandler = HTTPSConnection = object
+
+is_available = ssl is not None and object not in (HTTPSHandler, HTTPSConnection)
+
+
+try:
+    from ssl import CertificateError, match_hostname
+except ImportError:
+    try:
+        from backports.ssl_match_hostname import CertificateError
+        from backports.ssl_match_hostname import match_hostname
+    except ImportError:
+        CertificateError = None
+        match_hostname = None
+
+if not CertificateError:
+
+    class CertificateError(ValueError):
+        pass
+
+
+if not match_hostname:
+
+    def _dnsname_match(dn, hostname, max_wildcards=1):
+        """Matching according to RFC 6125, section 6.4.3
+
+        https://tools.ietf.org/html/rfc6125#section-6.4.3
+        """
+        pats = []
+        if not dn:
+            return False
+
+        # Ported from python3-syntax:
+        # leftmost, *remainder = dn.split(r'.')
+        parts = dn.split(r'.')
+        leftmost = parts[0]
+        remainder = parts[1:]
+
+        wildcards = leftmost.count('*')
+        if wildcards > max_wildcards:
+            # Issue #17980: avoid denials of service by refusing more
+            # than one wildcard per fragment.  A survey of established
+            # policy among SSL implementations showed it to be a
+            # reasonable choice.
+            raise CertificateError(
+                "too many wildcards in certificate DNS name: " + repr(dn))
+
+        # speed up common case w/o wildcards
+        if not wildcards:
+            return dn.lower() == hostname.lower()
+
+        # RFC 6125, section 6.4.3, subitem 1.
+        # The client SHOULD NOT attempt to match a presented identifier in which
+        # the wildcard character comprises a label other than the left-most label.
+        if leftmost == '*':
+            # When '*' is a fragment by itself, it matches a non-empty dotless
+            # fragment.
+            pats.append('[^.]+')
+        elif leftmost.startswith('xn--') or hostname.startswith('xn--'):
+            # RFC 6125, section 6.4.3, subitem 3.
+            # The client SHOULD NOT attempt to match a presented identifier
+            # where the wildcard character is embedded within an A-label or
+            # U-label of an internationalized domain name.
+            pats.append(re.escape(leftmost))
+        else:
+            # Otherwise, '*' matches any dotless string, e.g. www*
+            pats.append(re.escape(leftmost).replace(r'\*', '[^.]*'))
+
+        # add the remaining fragments, ignore any wildcards
+        for frag in remainder:
+            pats.append(re.escape(frag))
+
+        pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
+        return pat.match(hostname)
+
+    def match_hostname(cert, hostname):
+        """Verify that *cert* (in decoded format as returned by
+        SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
+        rules are followed, but IP addresses are not accepted for *hostname*.
+
+        CertificateError is raised on failure. On success, the function
+        returns nothing.
+        """
+        if not cert:
+            raise ValueError("empty or no certificate")
+        dnsnames = []
+        san = cert.get('subjectAltName', ())
+        for key, value in san:
+            if key == 'DNS':
+                if _dnsname_match(value, hostname):
+                    return
+                dnsnames.append(value)
+        if not dnsnames:
+            # The subject is only checked when there is no dNSName entry
+            # in subjectAltName
+            for sub in cert.get('subject', ()):
+                for key, value in sub:
+                    # XXX according to RFC 2818, the most specific Common Name
+                    # must be used.
+                    if key == 'commonName':
+                        if _dnsname_match(value, hostname):
+                            return
+                        dnsnames.append(value)
+        if len(dnsnames) > 1:
+            raise CertificateError("hostname %r "
+                "doesn't match either of %s"
+                % (hostname, ', '.join(map(repr, dnsnames))))
+        elif len(dnsnames) == 1:
+            raise CertificateError("hostname %r "
+                "doesn't match %r"
+                % (hostname, dnsnames[0]))
+        else:
+            raise CertificateError("no appropriate commonName or "
+                "subjectAltName fields were found")
+
+
+class VerifyingHTTPSHandler(HTTPSHandler):
+    """Simple verifying handler: no auth, subclasses, timeouts, etc."""
+
+    def __init__(self, ca_bundle):
+        self.ca_bundle = ca_bundle
+        HTTPSHandler.__init__(self)
+
+    def https_open(self, req):
+        return self.do_open(
+            lambda host, **kw: VerifyingHTTPSConn(host, self.ca_bundle, **kw), req
+        )
+
+
+class VerifyingHTTPSConn(HTTPSConnection):
+    """Simple verifying connection: no auth, subclasses, timeouts, etc."""
+
+    def __init__(self, host, ca_bundle, **kw):
+        HTTPSConnection.__init__(self, host, **kw)
+        self.ca_bundle = ca_bundle
+
+    def connect(self):
+        sock = socket.create_connection(
+            (self.host, self.port), getattr(self, 'source_address', None)
+        )
+
+        # Handle the socket if a (proxy) tunnel is present
+        if hasattr(self, '_tunnel') and getattr(self, '_tunnel_host', None):
+            self.sock = sock
+            self._tunnel()
+            # http://bugs.python.org/issue7776: Python>=3.4.1 and >=2.7.7
+            # change self.host to mean the proxy server host when tunneling is
+            # being used. Adapt, since we are interested in the destination
+            # host for the match_hostname() comparison.
+            actual_host = self._tunnel_host
+        else:
+            actual_host = self.host
+
+        if hasattr(ssl, 'create_default_context'):
+            ctx = ssl.create_default_context(cafile=self.ca_bundle)
+            self.sock = ctx.wrap_socket(sock, server_hostname=actual_host)
+        else:
+            # This is for python < 2.7.9 and < 3.4?
+            self.sock = ssl.wrap_socket(
+                sock, cert_reqs=ssl.CERT_REQUIRED, ca_certs=self.ca_bundle
+            )
+        try:
+            match_hostname(self.sock.getpeercert(), actual_host)
+        except CertificateError:
+            self.sock.shutdown(socket.SHUT_RDWR)
+            self.sock.close()
+            raise
+
+
+def opener_for(ca_bundle=None):
+    """Get a urlopen() replacement that uses ca_bundle for verification"""
+    return urllib.request.build_opener(
+        VerifyingHTTPSHandler(ca_bundle or find_ca_bundle())
+    ).open
+
+
+# from jaraco.functools
+def once(func):
+    @functools.wraps(func)
+    def wrapper(*args, **kwargs):
+        if not hasattr(func, 'always_returns'):
+            func.always_returns = func(*args, **kwargs)
+        return func.always_returns
+    return wrapper
+
+
+@once
+def get_win_certfile():
+    try:
+        import wincertstore
+    except ImportError:
+        return None
+
+    class CertFile(wincertstore.CertFile):
+        def __init__(self):
+            super(CertFile, self).__init__()
+            atexit.register(self.close)
+
+        def close(self):
+            try:
+                super(CertFile, self).close()
+            except OSError:
+                pass
+
+    _wincerts = CertFile()
+    _wincerts.addstore('CA')
+    _wincerts.addstore('ROOT')
+    return _wincerts.name
+
+
+def find_ca_bundle():
+    """Return an existing CA bundle path, or None"""
+    extant_cert_paths = filter(os.path.isfile, cert_paths)
+    return (
+        get_win_certfile()
+        or next(extant_cert_paths, None)
+        or _certifi_where()
+    )
+
+
+def _certifi_where():
+    try:
+        return __import__('certifi').where()
+    except (ImportError, ResolutionError, ExtractionError):
+        pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/unicode_utils.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/unicode_utils.py
new file mode 100644
index 0000000..7c63efd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/unicode_utils.py
@@ -0,0 +1,44 @@
+import unicodedata
+import sys
+
+from setuptools.extern import six
+
+
+# HFS Plus uses decomposed UTF-8
+def decompose(path):
+    if isinstance(path, six.text_type):
+        return unicodedata.normalize('NFD', path)
+    try:
+        path = path.decode('utf-8')
+        path = unicodedata.normalize('NFD', path)
+        path = path.encode('utf-8')
+    except UnicodeError:
+        pass  # Not UTF-8
+    return path
+
+
+def filesys_decode(path):
+    """
+    Ensure that the given path is decoded,
+    NONE when no expected encoding works
+    """
+
+    if isinstance(path, six.text_type):
+        return path
+
+    fs_enc = sys.getfilesystemencoding() or 'utf-8'
+    candidates = fs_enc, 'utf-8'
+
+    for enc in candidates:
+        try:
+            return path.decode(enc)
+        except UnicodeDecodeError:
+            continue
+
+
+def try_encode(string, enc):
+    "turn unicode encoding into a functional routine"
+    try:
+        return string.encode(enc)
+    except UnicodeEncodeError:
+        return None
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/version.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/version.py
new file mode 100644
index 0000000..95e1869
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/version.py
@@ -0,0 +1,6 @@
+import pkg_resources
+
+try:
+    __version__ = pkg_resources.get_distribution('setuptools').version
+except Exception:
+    __version__ = 'unknown'
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/wheel.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/wheel.py
new file mode 100644
index 0000000..e11f0a1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/wheel.py
@@ -0,0 +1,211 @@
+"""Wheels support."""
+
+from distutils.util import get_platform
+import email
+import itertools
+import os
+import posixpath
+import re
+import zipfile
+
+import pkg_resources
+import setuptools
+from pkg_resources import parse_version
+from setuptools.extern.packaging.utils import canonicalize_name
+from setuptools.extern.six import PY3
+from setuptools import pep425tags
+from setuptools.command.egg_info import write_requirements
+
+
+__metaclass__ = type
+
+
+WHEEL_NAME = re.compile(
+    r"""^(?P<project_name>.+?)-(?P<version>\d.*?)
+    ((-(?P<build>\d.*?))?-(?P<py_version>.+?)-(?P<abi>.+?)-(?P<platform>.+?)
+    )\.whl$""",
+    re.VERBOSE).match
+
+NAMESPACE_PACKAGE_INIT = '''\
+try:
+    __import__('pkg_resources').declare_namespace(__name__)
+except ImportError:
+    __path__ = __import__('pkgutil').extend_path(__path__, __name__)
+'''
+
+
+def unpack(src_dir, dst_dir):
+    '''Move everything under `src_dir` to `dst_dir`, and delete the former.'''
+    for dirpath, dirnames, filenames in os.walk(src_dir):
+        subdir = os.path.relpath(dirpath, src_dir)
+        for f in filenames:
+            src = os.path.join(dirpath, f)
+            dst = os.path.join(dst_dir, subdir, f)
+            os.renames(src, dst)
+        for n, d in reversed(list(enumerate(dirnames))):
+            src = os.path.join(dirpath, d)
+            dst = os.path.join(dst_dir, subdir, d)
+            if not os.path.exists(dst):
+                # Directory does not exist in destination,
+                # rename it and prune it from os.walk list.
+                os.renames(src, dst)
+                del dirnames[n]
+    # Cleanup.
+    for dirpath, dirnames, filenames in os.walk(src_dir, topdown=True):
+        assert not filenames
+        os.rmdir(dirpath)
+
+
+class Wheel:
+
+    def __init__(self, filename):
+        match = WHEEL_NAME(os.path.basename(filename))
+        if match is None:
+            raise ValueError('invalid wheel name: %r' % filename)
+        self.filename = filename
+        for k, v in match.groupdict().items():
+            setattr(self, k, v)
+
+    def tags(self):
+        '''List tags (py_version, abi, platform) supported by this wheel.'''
+        return itertools.product(
+            self.py_version.split('.'),
+            self.abi.split('.'),
+            self.platform.split('.'),
+        )
+
+    def is_compatible(self):
+        '''Is the wheel is compatible with the current platform?'''
+        supported_tags = pep425tags.get_supported()
+        return next((True for t in self.tags() if t in supported_tags), False)
+
+    def egg_name(self):
+        return pkg_resources.Distribution(
+            project_name=self.project_name, version=self.version,
+            platform=(None if self.platform == 'any' else get_platform()),
+        ).egg_name() + '.egg'
+
+    def get_dist_info(self, zf):
+        # find the correct name of the .dist-info dir in the wheel file
+        for member in zf.namelist():
+            dirname = posixpath.dirname(member)
+            if (dirname.endswith('.dist-info') and
+                    canonicalize_name(dirname).startswith(
+                        canonicalize_name(self.project_name))):
+                return dirname
+        raise ValueError("unsupported wheel format. .dist-info not found")
+
+    def install_as_egg(self, destination_eggdir):
+        '''Install wheel as an egg directory.'''
+        with zipfile.ZipFile(self.filename) as zf:
+            self._install_as_egg(destination_eggdir, zf)
+
+    def _install_as_egg(self, destination_eggdir, zf):
+        dist_basename = '%s-%s' % (self.project_name, self.version)
+        dist_info = self.get_dist_info(zf)
+        dist_data = '%s.data' % dist_basename
+        egg_info = os.path.join(destination_eggdir, 'EGG-INFO')
+
+        self._convert_metadata(zf, destination_eggdir, dist_info, egg_info)
+        self._move_data_entries(destination_eggdir, dist_data)
+        self._fix_namespace_packages(egg_info, destination_eggdir)
+
+    @staticmethod
+    def _convert_metadata(zf, destination_eggdir, dist_info, egg_info):
+        def get_metadata(name):
+            with zf.open(posixpath.join(dist_info, name)) as fp:
+                value = fp.read().decode('utf-8') if PY3 else fp.read()
+                return email.parser.Parser().parsestr(value)
+
+        wheel_metadata = get_metadata('WHEEL')
+        # Check wheel format version is supported.
+        wheel_version = parse_version(wheel_metadata.get('Wheel-Version'))
+        wheel_v1 = (
+            parse_version('1.0') <= wheel_version < parse_version('2.0dev0')
+        )
+        if not wheel_v1:
+            raise ValueError(
+                'unsupported wheel format version: %s' % wheel_version)
+        # Extract to target directory.
+        os.mkdir(destination_eggdir)
+        zf.extractall(destination_eggdir)
+        # Convert metadata.
+        dist_info = os.path.join(destination_eggdir, dist_info)
+        dist = pkg_resources.Distribution.from_location(
+            destination_eggdir, dist_info,
+            metadata=pkg_resources.PathMetadata(destination_eggdir, dist_info),
+        )
+
+        # Note: Evaluate and strip markers now,
+        # as it's difficult to convert back from the syntax:
+        # foobar; "linux" in sys_platform and extra == 'test'
+        def raw_req(req):
+            req.marker = None
+            return str(req)
+        install_requires = list(sorted(map(raw_req, dist.requires())))
+        extras_require = {
+            extra: sorted(
+                req
+                for req in map(raw_req, dist.requires((extra,)))
+                if req not in install_requires
+            )
+            for extra in dist.extras
+        }
+        os.rename(dist_info, egg_info)
+        os.rename(
+            os.path.join(egg_info, 'METADATA'),
+            os.path.join(egg_info, 'PKG-INFO'),
+        )
+        setup_dist = setuptools.Distribution(
+            attrs=dict(
+                install_requires=install_requires,
+                extras_require=extras_require,
+            ),
+        )
+        write_requirements(
+            setup_dist.get_command_obj('egg_info'),
+            None,
+            os.path.join(egg_info, 'requires.txt'),
+        )
+
+    @staticmethod
+    def _move_data_entries(destination_eggdir, dist_data):
+        """Move data entries to their correct location."""
+        dist_data = os.path.join(destination_eggdir, dist_data)
+        dist_data_scripts = os.path.join(dist_data, 'scripts')
+        if os.path.exists(dist_data_scripts):
+            egg_info_scripts = os.path.join(
+                destination_eggdir, 'EGG-INFO', 'scripts')
+            os.mkdir(egg_info_scripts)
+            for entry in os.listdir(dist_data_scripts):
+                # Remove bytecode, as it's not properly handled
+                # during easy_install scripts install phase.
+                if entry.endswith('.pyc'):
+                    os.unlink(os.path.join(dist_data_scripts, entry))
+                else:
+                    os.rename(
+                        os.path.join(dist_data_scripts, entry),
+                        os.path.join(egg_info_scripts, entry),
+                    )
+            os.rmdir(dist_data_scripts)
+        for subdir in filter(os.path.exists, (
+            os.path.join(dist_data, d)
+            for d in ('data', 'headers', 'purelib', 'platlib')
+        )):
+            unpack(subdir, destination_eggdir)
+        if os.path.exists(dist_data):
+            os.rmdir(dist_data)
+
+    @staticmethod
+    def _fix_namespace_packages(egg_info, destination_eggdir):
+        namespace_packages = os.path.join(
+            egg_info, 'namespace_packages.txt')
+        if os.path.exists(namespace_packages):
+            with open(namespace_packages) as fp:
+                namespace_packages = fp.read().split()
+            for mod in namespace_packages:
+                mod_dir = os.path.join(destination_eggdir, *mod.split('.'))
+                mod_init = os.path.join(mod_dir, '__init__.py')
+                if os.path.exists(mod_dir) and not os.path.exists(mod_init):
+                    with open(mod_init, 'w') as fp:
+                        fp.write(NAMESPACE_PACKAGE_INIT)
diff --git a/python3-vckonline/lib/python3.8/site-packages/setuptools/windows_support.py b/python3-vckonline/lib/python3.8/site-packages/setuptools/windows_support.py
new file mode 100644
index 0000000..cb977cf
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/setuptools/windows_support.py
@@ -0,0 +1,29 @@
+import platform
+import ctypes
+
+
+def windows_only(func):
+    if platform.system() != 'Windows':
+        return lambda *args, **kwargs: None
+    return func
+
+
+@windows_only
+def hide_file(path):
+    """
+    Set the hidden attribute on a file or directory.
+
+    From http://stackoverflow.com/questions/19622133/
+
+    `path` must be text.
+    """
+    __import__('ctypes.wintypes')
+    SetFileAttributes = ctypes.windll.kernel32.SetFileAttributesW
+    SetFileAttributes.argtypes = ctypes.wintypes.LPWSTR, ctypes.wintypes.DWORD
+    SetFileAttributes.restype = ctypes.wintypes.BOOL
+
+    FILE_ATTRIBUTE_HIDDEN = 0x02
+
+    ret = SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN)
+    if not ret:
+        raise ctypes.WinError()
diff --git a/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/INSTALLER b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/LICENSE b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/LICENSE
new file mode 100644
index 0000000..de66331
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/LICENSE
@@ -0,0 +1,18 @@
+Copyright (c) 2010-2020 Benjamin Peterson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/METADATA b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/METADATA
new file mode 100644
index 0000000..869bf25
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/METADATA
@@ -0,0 +1,49 @@
+Metadata-Version: 2.1
+Name: six
+Version: 1.15.0
+Summary: Python 2 and 3 compatibility utilities
+Home-page: https://github.com/benjaminp/six
+Author: Benjamin Peterson
+Author-email: benjamin@python.org
+License: MIT
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 3
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Topic :: Software Development :: Libraries
+Classifier: Topic :: Utilities
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*
+
+.. image:: https://img.shields.io/pypi/v/six.svg
+   :target: https://pypi.org/project/six/
+   :alt: six on PyPI
+
+.. image:: https://travis-ci.org/benjaminp/six.svg?branch=master
+   :target: https://travis-ci.org/benjaminp/six
+   :alt: six on TravisCI
+
+.. image:: https://readthedocs.org/projects/six/badge/?version=latest
+   :target: https://six.readthedocs.io/
+   :alt: six's documentation on Read the Docs
+
+.. image:: https://img.shields.io/badge/license-MIT-green.svg
+   :target: https://github.com/benjaminp/six/blob/master/LICENSE
+   :alt: MIT License badge
+
+Six is a Python 2 and 3 compatibility library.  It provides utility functions
+for smoothing over the differences between the Python versions with the goal of
+writing Python code that is compatible on both Python versions.  See the
+documentation for more information on what is provided.
+
+Six supports Python 2.7 and 3.3+.  It is contained in only one Python
+file, so it can be easily copied into your project. (The copyright and license
+notice must be retained.)
+
+Online documentation is at https://six.readthedocs.io/.
+
+Bugs can be reported to https://github.com/benjaminp/six.  The code can also
+be found there.
+
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/RECORD b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/RECORD
new file mode 100644
index 0000000..80bf846
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/RECORD
@@ -0,0 +1,8 @@
+__pycache__/six.cpython-38.pyc,,
+six-1.15.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+six-1.15.0.dist-info/LICENSE,sha256=i7hQxWWqOJ_cFvOkaWWtI9gq3_YPI5P8J2K2MYXo5sk,1066
+six-1.15.0.dist-info/METADATA,sha256=W6rlyoeMZHXh6srP9NXNsm0rjAf_660re8WdH5TBT8E,1795
+six-1.15.0.dist-info/RECORD,,
+six-1.15.0.dist-info/WHEEL,sha256=kGT74LWyRUZrL4VgLh6_g12IeVl_9u9ZVhadrgXZUEY,110
+six-1.15.0.dist-info/top_level.txt,sha256=_iVH_iYEtEXnD8nYGQYpYFUvkUW9sEO1GYbkeKSAais,4
+six.py,sha256=U4Z_yv534W5CNyjY9i8V1OXY2SjAny8y2L5vDLhhThM,34159
diff --git a/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/WHEEL b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/WHEEL
new file mode 100644
index 0000000..ef99c6c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/top_level.txt b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/top_level.txt
new file mode 100644
index 0000000..ffe2fce
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/six-1.15.0.dist-info/top_level.txt
@@ -0,0 +1 @@
+six
diff --git a/python3-vckonline/lib/python3.8/site-packages/six.py b/python3-vckonline/lib/python3.8/site-packages/six.py
new file mode 100644
index 0000000..83f6978
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/six.py
@@ -0,0 +1,982 @@
+# Copyright (c) 2010-2020 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.15.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("getoutput", "commands", "subprocess"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("collections_abc", "collections", "collections.abc" if sys.version_info >= (3, 3) else "collections"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("dbm_ndbm", "dbm", "dbm.ndbm"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread" if sys.version_info < (3, 9) else "_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("email_mime_image", "email.MIMEImage", "email.mime.image"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_to_bytes", "urllib", "urllib.parse", "unquote", "unquote_to_bytes"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("splitvalue", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+    MovedAttribute("parse_http_list", "urllib2", "urllib.request"),
+    MovedAttribute("parse_keqv_list", "urllib2", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    del io
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+        _assertNotRegex = "assertNotRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+        _assertNotRegex = "assertNotRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+    _assertNotRegex = "assertNotRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+def assertNotRegex(self, *args, **kwargs):
+    return getattr(self, _assertNotRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        try:
+            if value is None:
+                value = tp()
+            if value.__traceback__ is not tb:
+                raise value.with_traceback(tb)
+            raise value
+        finally:
+            value = None
+            tb = None
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    try:
+        raise tp, value, tb
+    finally:
+        tb = None
+""")
+
+
+if sys.version_info[:2] > (3,):
+    exec_("""def raise_from(value, from_value):
+    try:
+        raise value from from_value
+    finally:
+        value = None
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    # This does exactly the same what the :func:`py3:functools.update_wrapper`
+    # function does on Python versions after 3.2. It sets the ``__wrapped__``
+    # attribute on ``wrapper`` object and it doesn't raise an error if any of
+    # the attributes mentioned in ``assigned`` and ``updated`` are missing on
+    # ``wrapped`` object.
+    def _update_wrapper(wrapper, wrapped,
+                        assigned=functools.WRAPPER_ASSIGNMENTS,
+                        updated=functools.WRAPPER_UPDATES):
+        for attr in assigned:
+            try:
+                value = getattr(wrapped, attr)
+            except AttributeError:
+                continue
+            else:
+                setattr(wrapper, attr, value)
+        for attr in updated:
+            getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
+        wrapper.__wrapped__ = wrapped
+        return wrapper
+    _update_wrapper.__doc__ = functools.update_wrapper.__doc__
+
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        return functools.partial(_update_wrapper, wrapped=wrapped,
+                                 assigned=assigned, updated=updated)
+    wraps.__doc__ = functools.wraps.__doc__
+
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(type):
+
+        def __new__(cls, name, this_bases, d):
+            if sys.version_info[:2] >= (3, 7):
+                # This version introduced PEP 560 that requires a bit
+                # of extra care (we mimic what is done by __build_class__).
+                resolved_bases = types.resolve_bases(bases)
+                if resolved_bases is not bases:
+                    d['__orig_bases__'] = bases
+            else:
+                resolved_bases = bases
+            return meta(name, resolved_bases, d)
+
+        @classmethod
+        def __prepare__(cls, name, this_bases):
+            return meta.__prepare__(name, bases)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        if hasattr(cls, '__qualname__'):
+            orig_vars['__qualname__'] = cls.__qualname__
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def ensure_binary(s, encoding='utf-8', errors='strict'):
+    """Coerce **s** to six.binary_type.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> encoded to `bytes`
+      - `bytes` -> `bytes`
+    """
+    if isinstance(s, binary_type):
+        return s
+    if isinstance(s, text_type):
+        return s.encode(encoding, errors)
+    raise TypeError("not expecting type '%s'" % type(s))
+
+
+def ensure_str(s, encoding='utf-8', errors='strict'):
+    """Coerce *s* to `str`.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    # Optimization: Fast return for the common case.
+    if type(s) is str:
+        return s
+    if PY2 and isinstance(s, text_type):
+        return s.encode(encoding, errors)
+    elif PY3 and isinstance(s, binary_type):
+        return s.decode(encoding, errors)
+    elif not isinstance(s, (text_type, binary_type)):
+        raise TypeError("not expecting type '%s'" % type(s))
+    return s
+
+
+def ensure_text(s, encoding='utf-8', errors='strict'):
+    """Coerce *s* to six.text_type.
+
+    For Python 2:
+      - `unicode` -> `unicode`
+      - `str` -> `unicode`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    if isinstance(s, binary_type):
+        return s.decode(encoding, errors)
+    elif isinstance(s, text_type):
+        return s
+    else:
+        raise TypeError("not expecting type '%s'" % type(s))
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A class decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/__init__.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/__init__.py
new file mode 100644
index 0000000..f163e76
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/__init__.py
@@ -0,0 +1,20 @@
+"""
+werkzeug
+~~~~~~~~
+
+Werkzeug is the Swiss Army knife of Python web development.
+
+It provides useful classes and functions for any WSGI application to
+make the life of a Python web developer much easier. All of the provided
+classes are independent from each other so you can mix it with any other
+library.
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+from .serving import run_simple
+from .test import Client
+from .wrappers import Request
+from .wrappers import Response
+
+__version__ = "1.0.1"
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--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/_compat.py
@@ -0,0 +1,228 @@
+# flake8: noqa
+# This whole file is full of lint errors
+import functools
+import operator
+import sys
+
+try:
+    import builtins
+except ImportError:
+    import __builtin__ as builtins
+
+
+PY2 = sys.version_info[0] == 2
+WIN = sys.platform.startswith("win")
+
+_identity = lambda x: x
+
+if PY2:
+    unichr = unichr
+    text_type = unicode
+    string_types = (str, unicode)
+    integer_types = (int, long)
+
+    iterkeys = lambda d, *args, **kwargs: d.iterkeys(*args, **kwargs)
+    itervalues = lambda d, *args, **kwargs: d.itervalues(*args, **kwargs)
+    iteritems = lambda d, *args, **kwargs: d.iteritems(*args, **kwargs)
+
+    iterlists = lambda d, *args, **kwargs: d.iterlists(*args, **kwargs)
+    iterlistvalues = lambda d, *args, **kwargs: d.iterlistvalues(*args, **kwargs)
+
+    int_to_byte = chr
+    iter_bytes = iter
+
+    import collections as collections_abc
+
+    exec("def reraise(tp, value, tb=None):\n raise tp, value, tb")
+
+    def fix_tuple_repr(obj):
+        def __repr__(self):
+            cls = self.__class__
+            return "%s(%s)" % (
+                cls.__name__,
+                ", ".join(
+                    "%s=%r" % (field, self[index])
+                    for index, field in enumerate(cls._fields)
+                ),
+            )
+
+        obj.__repr__ = __repr__
+        return obj
+
+    def implements_iterator(cls):
+        cls.next = cls.__next__
+        del cls.__next__
+        return cls
+
+    def implements_to_string(cls):
+        cls.__unicode__ = cls.__str__
+        cls.__str__ = lambda x: x.__unicode__().encode("utf-8")
+        return cls
+
+    def native_string_result(func):
+        def wrapper(*args, **kwargs):
+            return func(*args, **kwargs).encode("utf-8")
+
+        return functools.update_wrapper(wrapper, func)
+
+    def implements_bool(cls):
+        cls.__nonzero__ = cls.__bool__
+        del cls.__bool__
+        return cls
+
+    from itertools import imap, izip, ifilter
+
+    range_type = xrange
+
+    from StringIO import StringIO
+    from cStringIO import StringIO as BytesIO
+
+    NativeStringIO = BytesIO
+
+    def make_literal_wrapper(reference):
+        return _identity
+
+    def normalize_string_tuple(tup):
+        """Normalizes a string tuple to a common type. Following Python 2
+        rules, upgrades to unicode are implicit.
+        """
+        if any(isinstance(x, text_type) for x in tup):
+            return tuple(to_unicode(x) for x in tup)
+        return tup
+
+    def try_coerce_native(s):
+        """Try to coerce a unicode string to native if possible. Otherwise,
+        leave it as unicode.
+        """
+        try:
+            return to_native(s)
+        except UnicodeError:
+            return s
+
+    wsgi_get_bytes = _identity
+
+    def wsgi_decoding_dance(s, charset="utf-8", errors="replace"):
+        return s.decode(charset, errors)
+
+    def wsgi_encoding_dance(s, charset="utf-8", errors="replace"):
+        if isinstance(s, bytes):
+            return s
+        return s.encode(charset, errors)
+
+    def to_bytes(x, charset=sys.getdefaultencoding(), errors="strict"):
+        if x is None:
+            return None
+        if isinstance(x, (bytes, bytearray, buffer)):
+            return bytes(x)
+        if isinstance(x, unicode):
+            return x.encode(charset, errors)
+        raise TypeError("Expected bytes")
+
+    def to_native(x, charset=sys.getdefaultencoding(), errors="strict"):
+        if x is None or isinstance(x, str):
+            return x
+        return x.encode(charset, errors)
+
+
+else:
+    unichr = chr
+    text_type = str
+    string_types = (str,)
+    integer_types = (int,)
+
+    iterkeys = lambda d, *args, **kwargs: iter(d.keys(*args, **kwargs))
+    itervalues = lambda d, *args, **kwargs: iter(d.values(*args, **kwargs))
+    iteritems = lambda d, *args, **kwargs: iter(d.items(*args, **kwargs))
+
+    iterlists = lambda d, *args, **kwargs: iter(d.lists(*args, **kwargs))
+    iterlistvalues = lambda d, *args, **kwargs: iter(d.listvalues(*args, **kwargs))
+
+    int_to_byte = operator.methodcaller("to_bytes", 1, "big")
+    iter_bytes = functools.partial(map, int_to_byte)
+
+    import collections.abc as collections_abc
+
+    def reraise(tp, value, tb=None):
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+    fix_tuple_repr = _identity
+    implements_iterator = _identity
+    implements_to_string = _identity
+    implements_bool = _identity
+    native_string_result = _identity
+    imap = map
+    izip = zip
+    ifilter = filter
+    range_type = range
+
+    from io import StringIO, BytesIO
+
+    NativeStringIO = StringIO
+
+    _latin1_encode = operator.methodcaller("encode", "latin1")
+
+    def make_literal_wrapper(reference):
+        if isinstance(reference, text_type):
+            return _identity
+        return _latin1_encode
+
+    def normalize_string_tuple(tup):
+        """Ensures that all types in the tuple are either strings
+        or bytes.
+        """
+        tupiter = iter(tup)
+        is_text = isinstance(next(tupiter, None), text_type)
+        for arg in tupiter:
+            if isinstance(arg, text_type) != is_text:
+                raise TypeError(
+                    "Cannot mix str and bytes arguments (got %s)" % repr(tup)
+                )
+        return tup
+
+    try_coerce_native = _identity
+    wsgi_get_bytes = _latin1_encode
+
+    def wsgi_decoding_dance(s, charset="utf-8", errors="replace"):
+        return s.encode("latin1").decode(charset, errors)
+
+    def wsgi_encoding_dance(s, charset="utf-8", errors="replace"):
+        if isinstance(s, text_type):
+            s = s.encode(charset)
+        return s.decode("latin1", errors)
+
+    def to_bytes(x, charset=sys.getdefaultencoding(), errors="strict"):
+        if x is None:
+            return None
+        if isinstance(x, (bytes, bytearray, memoryview)):  # noqa
+            return bytes(x)
+        if isinstance(x, str):
+            return x.encode(charset, errors)
+        raise TypeError("Expected bytes")
+
+    def to_native(x, charset=sys.getdefaultencoding(), errors="strict"):
+        if x is None or isinstance(x, str):
+            return x
+        return x.decode(charset, errors)
+
+
+def to_unicode(
+    x, charset=sys.getdefaultencoding(), errors="strict", allow_none_charset=False
+):
+    if x is None:
+        return None
+    if not isinstance(x, bytes):
+        return text_type(x)
+    if charset is None and allow_none_charset:
+        return x
+    return x.decode(charset, errors)
+
+
+try:
+    from os import fspath
+except ImportError:
+    # Python < 3.6
+    # https://www.python.org/dev/peps/pep-0519/#backwards-compatibility
+    def fspath(path):
+        return path.__fspath__() if hasattr(path, "__fspath__") else path
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/_internal.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/_internal.py
new file mode 100644
index 0000000..1d2eaf5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/_internal.py
@@ -0,0 +1,473 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug._internal
+    ~~~~~~~~~~~~~~~~~~
+
+    This module provides internally used helpers and constants.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import inspect
+import logging
+import re
+import string
+from datetime import date
+from datetime import datetime
+from itertools import chain
+from weakref import WeakKeyDictionary
+
+from ._compat import int_to_byte
+from ._compat import integer_types
+from ._compat import iter_bytes
+from ._compat import range_type
+from ._compat import text_type
+
+
+_logger = None
+_signature_cache = WeakKeyDictionary()
+_epoch_ord = date(1970, 1, 1).toordinal()
+_legal_cookie_chars = (
+    string.ascii_letters + string.digits + u"/=!#$%&'*+-.^_`|~:"
+).encode("ascii")
+
+_cookie_quoting_map = {b",": b"\\054", b";": b"\\073", b'"': b'\\"', b"\\": b"\\\\"}
+for _i in chain(range_type(32), range_type(127, 256)):
+    _cookie_quoting_map[int_to_byte(_i)] = ("\\%03o" % _i).encode("latin1")
+
+_octal_re = re.compile(br"\\[0-3][0-7][0-7]")
+_quote_re = re.compile(br"[\\].")
+_legal_cookie_chars_re = br"[\w\d!#%&\'~_`><@,:/\$\*\+\-\.\^\|\)\(\?\}\{\=]"
+_cookie_re = re.compile(
+    br"""
+    (?P<key>[^=;]+)
+    (?:\s*=\s*
+        (?P<val>
+            "(?:[^\\"]|\\.)*" |
+             (?:.*?)
+        )
+    )?
+    \s*;
+""",
+    flags=re.VERBOSE,
+)
+
+
+class _Missing(object):
+    def __repr__(self):
+        return "no value"
+
+    def __reduce__(self):
+        return "_missing"
+
+
+_missing = _Missing()
+
+
+def _get_environ(obj):
+    env = getattr(obj, "environ", obj)
+    assert isinstance(env, dict), (
+        "%r is not a WSGI environment (has to be a dict)" % type(obj).__name__
+    )
+    return env
+
+
+def _has_level_handler(logger):
+    """Check if there is a handler in the logging chain that will handle
+    the given logger's effective level.
+    """
+    level = logger.getEffectiveLevel()
+    current = logger
+
+    while current:
+        if any(handler.level <= level for handler in current.handlers):
+            return True
+
+        if not current.propagate:
+            break
+
+        current = current.parent
+
+    return False
+
+
+def _log(type, message, *args, **kwargs):
+    """Log a message to the 'werkzeug' logger.
+
+    The logger is created the first time it is needed. If there is no
+    level set, it is set to :data:`logging.INFO`. If there is no handler
+    for the logger's effective level, a :class:`logging.StreamHandler`
+    is added.
+    """
+    global _logger
+
+    if _logger is None:
+        _logger = logging.getLogger("werkzeug")
+
+        if _logger.level == logging.NOTSET:
+            _logger.setLevel(logging.INFO)
+
+        if not _has_level_handler(_logger):
+            _logger.addHandler(logging.StreamHandler())
+
+    getattr(_logger, type)(message.rstrip(), *args, **kwargs)
+
+
+def _parse_signature(func):
+    """Return a signature object for the function."""
+    if hasattr(func, "im_func"):
+        func = func.im_func
+
+    # if we have a cached validator for this function, return it
+    parse = _signature_cache.get(func)
+    if parse is not None:
+        return parse
+
+    # inspect the function signature and collect all the information
+    if hasattr(inspect, "getfullargspec"):
+        tup = inspect.getfullargspec(func)
+    else:
+        tup = inspect.getargspec(func)
+    positional, vararg_var, kwarg_var, defaults = tup[:4]
+    defaults = defaults or ()
+    arg_count = len(positional)
+    arguments = []
+    for idx, name in enumerate(positional):
+        if isinstance(name, list):
+            raise TypeError(
+                "cannot parse functions that unpack tuples in the function signature"
+            )
+        try:
+            default = defaults[idx - arg_count]
+        except IndexError:
+            param = (name, False, None)
+        else:
+            param = (name, True, default)
+        arguments.append(param)
+    arguments = tuple(arguments)
+
+    def parse(args, kwargs):
+        new_args = []
+        missing = []
+        extra = {}
+
+        # consume as many arguments as positional as possible
+        for idx, (name, has_default, default) in enumerate(arguments):
+            try:
+                new_args.append(args[idx])
+            except IndexError:
+                try:
+                    new_args.append(kwargs.pop(name))
+                except KeyError:
+                    if has_default:
+                        new_args.append(default)
+                    else:
+                        missing.append(name)
+            else:
+                if name in kwargs:
+                    extra[name] = kwargs.pop(name)
+
+        # handle extra arguments
+        extra_positional = args[arg_count:]
+        if vararg_var is not None:
+            new_args.extend(extra_positional)
+            extra_positional = ()
+        if kwargs and kwarg_var is None:
+            extra.update(kwargs)
+            kwargs = {}
+
+        return (
+            new_args,
+            kwargs,
+            missing,
+            extra,
+            extra_positional,
+            arguments,
+            vararg_var,
+            kwarg_var,
+        )
+
+    _signature_cache[func] = parse
+    return parse
+
+
+def _date_to_unix(arg):
+    """Converts a timetuple, integer or datetime object into the seconds from
+    epoch in utc.
+    """
+    if isinstance(arg, datetime):
+        arg = arg.utctimetuple()
+    elif isinstance(arg, integer_types + (float,)):
+        return int(arg)
+    year, month, day, hour, minute, second = arg[:6]
+    days = date(year, month, 1).toordinal() - _epoch_ord + day - 1
+    hours = days * 24 + hour
+    minutes = hours * 60 + minute
+    seconds = minutes * 60 + second
+    return seconds
+
+
+class _DictAccessorProperty(object):
+    """Baseclass for `environ_property` and `header_property`."""
+
+    read_only = False
+
+    def __init__(
+        self,
+        name,
+        default=None,
+        load_func=None,
+        dump_func=None,
+        read_only=None,
+        doc=None,
+    ):
+        self.name = name
+        self.default = default
+        self.load_func = load_func
+        self.dump_func = dump_func
+        if read_only is not None:
+            self.read_only = read_only
+        self.__doc__ = doc
+
+    def __get__(self, obj, type=None):
+        if obj is None:
+            return self
+        storage = self.lookup(obj)
+        if self.name not in storage:
+            return self.default
+        rv = storage[self.name]
+        if self.load_func is not None:
+            try:
+                rv = self.load_func(rv)
+            except (ValueError, TypeError):
+                rv = self.default
+        return rv
+
+    def __set__(self, obj, value):
+        if self.read_only:
+            raise AttributeError("read only property")
+        if self.dump_func is not None:
+            value = self.dump_func(value)
+        self.lookup(obj)[self.name] = value
+
+    def __delete__(self, obj):
+        if self.read_only:
+            raise AttributeError("read only property")
+        self.lookup(obj).pop(self.name, None)
+
+    def __repr__(self):
+        return "<%s %s>" % (self.__class__.__name__, self.name)
+
+
+def _cookie_quote(b):
+    buf = bytearray()
+    all_legal = True
+    _lookup = _cookie_quoting_map.get
+    _push = buf.extend
+
+    for char in iter_bytes(b):
+        if char not in _legal_cookie_chars:
+            all_legal = False
+            char = _lookup(char, char)
+        _push(char)
+
+    if all_legal:
+        return bytes(buf)
+    return bytes(b'"' + buf + b'"')
+
+
+def _cookie_unquote(b):
+    if len(b) < 2:
+        return b
+    if b[:1] != b'"' or b[-1:] != b'"':
+        return b
+
+    b = b[1:-1]
+
+    i = 0
+    n = len(b)
+    rv = bytearray()
+    _push = rv.extend
+
+    while 0 <= i < n:
+        o_match = _octal_re.search(b, i)
+        q_match = _quote_re.search(b, i)
+        if not o_match and not q_match:
+            rv.extend(b[i:])
+            break
+        j = k = -1
+        if o_match:
+            j = o_match.start(0)
+        if q_match:
+            k = q_match.start(0)
+        if q_match and (not o_match or k < j):
+            _push(b[i:k])
+            _push(b[k + 1 : k + 2])
+            i = k + 2
+        else:
+            _push(b[i:j])
+            rv.append(int(b[j + 1 : j + 4], 8))
+            i = j + 4
+
+    return bytes(rv)
+
+
+def _cookie_parse_impl(b):
+    """Lowlevel cookie parsing facility that operates on bytes."""
+    i = 0
+    n = len(b)
+
+    while i < n:
+        match = _cookie_re.search(b + b";", i)
+        if not match:
+            break
+
+        key = match.group("key").strip()
+        value = match.group("val") or b""
+        i = match.end(0)
+
+        yield _cookie_unquote(key), _cookie_unquote(value)
+
+
+def _encode_idna(domain):
+    # If we're given bytes, make sure they fit into ASCII
+    if not isinstance(domain, text_type):
+        domain.decode("ascii")
+        return domain
+
+    # Otherwise check if it's already ascii, then return
+    try:
+        return domain.encode("ascii")
+    except UnicodeError:
+        pass
+
+    # Otherwise encode each part separately
+    parts = domain.split(".")
+    for idx, part in enumerate(parts):
+        parts[idx] = part.encode("idna")
+    return b".".join(parts)
+
+
+def _decode_idna(domain):
+    # If the input is a string try to encode it to ascii to
+    # do the idna decoding.  if that fails because of an
+    # unicode error, then we already have a decoded idna domain
+    if isinstance(domain, text_type):
+        try:
+            domain = domain.encode("ascii")
+        except UnicodeError:
+            return domain
+
+    # Decode each part separately.  If a part fails, try to
+    # decode it with ascii and silently ignore errors.  This makes
+    # most sense because the idna codec does not have error handling
+    parts = domain.split(b".")
+    for idx, part in enumerate(parts):
+        try:
+            parts[idx] = part.decode("idna")
+        except UnicodeError:
+            parts[idx] = part.decode("ascii", "ignore")
+
+    return ".".join(parts)
+
+
+def _make_cookie_domain(domain):
+    if domain is None:
+        return None
+    domain = _encode_idna(domain)
+    if b":" in domain:
+        domain = domain.split(b":", 1)[0]
+    if b"." in domain:
+        return domain
+    raise ValueError(
+        "Setting 'domain' for a cookie on a server running locally (ex: "
+        "localhost) is not supported by complying browsers. You should "
+        "have something like: '127.0.0.1 localhost dev.localhost' on "
+        "your hosts file and then point your server to run on "
+        "'dev.localhost' and also set 'domain' for 'dev.localhost'"
+    )
+
+
+def _easteregg(app=None):
+    """Like the name says.  But who knows how it works?"""
+
+    def bzzzzzzz(gyver):
+        import base64
+        import zlib
+
+        return zlib.decompress(base64.b64decode(gyver)).decode("ascii")
+
+    gyver = u"\n".join(
+        [
+            x + (77 - len(x)) * u" "
+            for x in bzzzzzzz(
+                b"""
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+RYhZqtkQZqSB2Qm0SGtjAw7RDwaM1roESC8HWiPxkoOy0lLTRFG39kvbLZbU9gFKFRvixDZBJmpi
+Xyq3RE5lW00EJjaqwp/v3EByMSpVZYsEIJ4APaHmVtpGSieV5CALOtNUAzTBiw81GLgC0quyzf6c
+NlWknzJeCsJ5fup2R4d8CYGN77mu5vnO1UqbfElZ9E6cR6zbHjgsr9ly18fXjZoPeDjPuzlWbFwS
+pdvPkhntFvkc13qb9094LL5NrA3NIq3r9eNnop9DizWOqCEbyRBFJTHn6Tt3CG1o8a4HevYh0XiJ
+sR0AVVHuGuMOIfbuQ/OKBkGRC6NJ4u7sbPX8bG/n5sNIOQ6/Y/BX3IwRlTSabtZpYLB85lYtkkgm
+p1qXK3Du2mnr5INXmT/78KI12n11EFBkJHHp0wJyLe9MvPNUGYsf+170maayRoy2lURGHAIapSpQ
+krEDuNoJCHNlZYhKpvw4mspVWxqo415n8cD62N9+EfHrAvqQnINStetek7RY2Urv8nxsnGaZfRr/
+nhXbJ6m/yl1LzYqscDZA9QHLNbdaSTTr+kFg3bC0iYbX/eQy0Bv3h4B50/SGYzKAXkCeOLI3bcAt
+mj2Z/FM1vQWgDynsRwNvrWnJHlespkrp8+vO1jNaibm+PhqXPPv30YwDZ6jApe3wUjFQobghvW9p
+7f2zLkGNv8b191cD/3vs9Q833z8t"""
+            ).splitlines()
+        ]
+    )
+
+    def easteregged(environ, start_response):
+        def injecting_start_response(status, headers, exc_info=None):
+            headers.append(("X-Powered-By", "Werkzeug"))
+            return start_response(status, headers, exc_info)
+
+        if app is not None and environ.get("QUERY_STRING") != "macgybarchakku":
+            return app(environ, injecting_start_response)
+        injecting_start_response("200 OK", [("Content-Type", "text/html")])
+        return [
+            (
+                u"""
+<!DOCTYPE html>
+<html>
+<head>
+<title>About Werkzeug</title>
+<style type="text/css">
+  body { font: 15px Georgia, serif; text-align: center; }
+  a { color: #333; text-decoration: none; }
+  h1 { font-size: 30px; margin: 20px 0 10px 0; }
+  p { margin: 0 0 30px 0; }
+  pre { font: 11px 'Consolas', 'Monaco', monospace; line-height: 0.95; }
+</style>
+</head>
+<body>
+<h1><a href="http://werkzeug.pocoo.org/">Werkzeug</a></h1>
+<p>the Swiss Army knife of Python web development.</p>
+<pre>%s\n\n\n</pre>
+</body>
+</html>"""
+                % gyver
+            ).encode("latin1")
+        ]
+
+    return easteregged
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/_reloader.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/_reloader.py
new file mode 100644
index 0000000..c2a9c8e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/_reloader.py
@@ -0,0 +1,341 @@
+import os
+import subprocess
+import sys
+import threading
+import time
+from itertools import chain
+
+from ._compat import iteritems
+from ._compat import PY2
+from ._compat import text_type
+from ._internal import _log
+
+
+def _iter_module_files():
+    """This iterates over all relevant Python files.  It goes through all
+    loaded files from modules, all files in folders of already loaded modules
+    as well as all files reachable through a package.
+    """
+    # The list call is necessary on Python 3 in case the module
+    # dictionary modifies during iteration.
+    for module in list(sys.modules.values()):
+        if module is None:
+            continue
+        filename = getattr(module, "__file__", None)
+        if filename:
+            if os.path.isdir(filename) and os.path.exists(
+                os.path.join(filename, "__init__.py")
+            ):
+                filename = os.path.join(filename, "__init__.py")
+
+            old = None
+            while not os.path.isfile(filename):
+                old = filename
+                filename = os.path.dirname(filename)
+                if filename == old:
+                    break
+            else:
+                if filename[-4:] in (".pyc", ".pyo"):
+                    filename = filename[:-1]
+                yield filename
+
+
+def _find_observable_paths(extra_files=None):
+    """Finds all paths that should be observed."""
+    rv = set(
+        os.path.dirname(os.path.abspath(x)) if os.path.isfile(x) else os.path.abspath(x)
+        for x in sys.path
+    )
+
+    for filename in extra_files or ():
+        rv.add(os.path.dirname(os.path.abspath(filename)))
+
+    for module in list(sys.modules.values()):
+        fn = getattr(module, "__file__", None)
+        if fn is None:
+            continue
+        fn = os.path.abspath(fn)
+        rv.add(os.path.dirname(fn))
+
+    return _find_common_roots(rv)
+
+
+def _get_args_for_reloading():
+    """Determine how the script was executed, and return the args needed
+    to execute it again in a new process.
+    """
+    rv = [sys.executable]
+    py_script = sys.argv[0]
+    args = sys.argv[1:]
+    # Need to look at main module to determine how it was executed.
+    __main__ = sys.modules["__main__"]
+
+    # The value of __package__ indicates how Python was called. It may
+    # not exist if a setuptools script is installed as an egg. It may be
+    # set incorrectly for entry points created with pip on Windows.
+    if getattr(__main__, "__package__", None) is None or (
+        os.name == "nt"
+        and __main__.__package__ == ""
+        and not os.path.exists(py_script)
+        and os.path.exists(py_script + ".exe")
+    ):
+        # Executed a file, like "python app.py".
+        py_script = os.path.abspath(py_script)
+
+        if os.name == "nt":
+            # Windows entry points have ".exe" extension and should be
+            # called directly.
+            if not os.path.exists(py_script) and os.path.exists(py_script + ".exe"):
+                py_script += ".exe"
+
+            if (
+                os.path.splitext(sys.executable)[1] == ".exe"
+                and os.path.splitext(py_script)[1] == ".exe"
+            ):
+                rv.pop(0)
+
+        rv.append(py_script)
+    else:
+        # Executed a module, like "python -m werkzeug.serving".
+        if sys.argv[0] == "-m":
+            # Flask works around previous behavior by putting
+            # "-m flask" in sys.argv.
+            # TODO remove this once Flask no longer misbehaves
+            args = sys.argv
+        else:
+            if os.path.isfile(py_script):
+                # Rewritten by Python from "-m script" to "/path/to/script.py".
+                py_module = __main__.__package__
+                name = os.path.splitext(os.path.basename(py_script))[0]
+
+                if name != "__main__":
+                    py_module += "." + name
+            else:
+                # Incorrectly rewritten by pydevd debugger from "-m script" to "script".
+                py_module = py_script
+
+            rv.extend(("-m", py_module.lstrip(".")))
+
+    rv.extend(args)
+    return rv
+
+
+def _find_common_roots(paths):
+    """Out of some paths it finds the common roots that need monitoring."""
+    paths = [x.split(os.path.sep) for x in paths]
+    root = {}
+    for chunks in sorted(paths, key=len, reverse=True):
+        node = root
+        for chunk in chunks:
+            node = node.setdefault(chunk, {})
+        node.clear()
+
+    rv = set()
+
+    def _walk(node, path):
+        for prefix, child in iteritems(node):
+            _walk(child, path + (prefix,))
+        if not node:
+            rv.add("/".join(path))
+
+    _walk(root, ())
+    return rv
+
+
+class ReloaderLoop(object):
+    name = None
+
+    # monkeypatched by testsuite. wrapping with `staticmethod` is required in
+    # case time.sleep has been replaced by a non-c function (e.g. by
+    # `eventlet.monkey_patch`) before we get here
+    _sleep = staticmethod(time.sleep)
+
+    def __init__(self, extra_files=None, interval=1):
+        self.extra_files = set(os.path.abspath(x) for x in extra_files or ())
+        self.interval = interval
+
+    def run(self):
+        pass
+
+    def restart_with_reloader(self):
+        """Spawn a new Python interpreter with the same arguments as this one,
+        but running the reloader thread.
+        """
+        while 1:
+            _log("info", " * Restarting with %s" % self.name)
+            args = _get_args_for_reloading()
+
+            # a weird bug on windows. sometimes unicode strings end up in the
+            # environment and subprocess.call does not like this, encode them
+            # to latin1 and continue.
+            if os.name == "nt" and PY2:
+                new_environ = {}
+                for key, value in iteritems(os.environ):
+                    if isinstance(key, text_type):
+                        key = key.encode("iso-8859-1")
+                    if isinstance(value, text_type):
+                        value = value.encode("iso-8859-1")
+                    new_environ[key] = value
+            else:
+                new_environ = os.environ.copy()
+
+            new_environ["WERKZEUG_RUN_MAIN"] = "true"
+            exit_code = subprocess.call(args, env=new_environ, close_fds=False)
+            if exit_code != 3:
+                return exit_code
+
+    def trigger_reload(self, filename):
+        self.log_reload(filename)
+        sys.exit(3)
+
+    def log_reload(self, filename):
+        filename = os.path.abspath(filename)
+        _log("info", " * Detected change in %r, reloading" % filename)
+
+
+class StatReloaderLoop(ReloaderLoop):
+    name = "stat"
+
+    def run(self):
+        mtimes = {}
+        while 1:
+            for filename in chain(_iter_module_files(), self.extra_files):
+                try:
+                    mtime = os.stat(filename).st_mtime
+                except OSError:
+                    continue
+
+                old_time = mtimes.get(filename)
+                if old_time is None:
+                    mtimes[filename] = mtime
+                    continue
+                elif mtime > old_time:
+                    self.trigger_reload(filename)
+            self._sleep(self.interval)
+
+
+class WatchdogReloaderLoop(ReloaderLoop):
+    def __init__(self, *args, **kwargs):
+        ReloaderLoop.__init__(self, *args, **kwargs)
+        from watchdog.observers import Observer
+        from watchdog.events import FileSystemEventHandler
+
+        self.observable_paths = set()
+
+        def _check_modification(filename):
+            if filename in self.extra_files:
+                self.trigger_reload(filename)
+            dirname = os.path.dirname(filename)
+            if dirname.startswith(tuple(self.observable_paths)):
+                if filename.endswith((".pyc", ".pyo", ".py")):
+                    self.trigger_reload(filename)
+
+        class _CustomHandler(FileSystemEventHandler):
+            def on_created(self, event):
+                _check_modification(event.src_path)
+
+            def on_modified(self, event):
+                _check_modification(event.src_path)
+
+            def on_moved(self, event):
+                _check_modification(event.src_path)
+                _check_modification(event.dest_path)
+
+            def on_deleted(self, event):
+                _check_modification(event.src_path)
+
+        reloader_name = Observer.__name__.lower()
+        if reloader_name.endswith("observer"):
+            reloader_name = reloader_name[:-8]
+        reloader_name += " reloader"
+
+        self.name = reloader_name
+
+        self.observer_class = Observer
+        self.event_handler = _CustomHandler()
+        self.should_reload = False
+
+    def trigger_reload(self, filename):
+        # This is called inside an event handler, which means throwing
+        # SystemExit has no effect.
+        # https://github.com/gorakhargosh/watchdog/issues/294
+        self.should_reload = True
+        self.log_reload(filename)
+
+    def run(self):
+        watches = {}
+        observer = self.observer_class()
+        observer.start()
+
+        try:
+            while not self.should_reload:
+                to_delete = set(watches)
+                paths = _find_observable_paths(self.extra_files)
+                for path in paths:
+                    if path not in watches:
+                        try:
+                            watches[path] = observer.schedule(
+                                self.event_handler, path, recursive=True
+                            )
+                        except OSError:
+                            # Clear this path from list of watches We don't want
+                            # the same error message showing again in the next
+                            # iteration.
+                            watches[path] = None
+                    to_delete.discard(path)
+                for path in to_delete:
+                    watch = watches.pop(path, None)
+                    if watch is not None:
+                        observer.unschedule(watch)
+                self.observable_paths = paths
+                self._sleep(self.interval)
+        finally:
+            observer.stop()
+            observer.join()
+
+        sys.exit(3)
+
+
+reloader_loops = {"stat": StatReloaderLoop, "watchdog": WatchdogReloaderLoop}
+
+try:
+    __import__("watchdog.observers")
+except ImportError:
+    reloader_loops["auto"] = reloader_loops["stat"]
+else:
+    reloader_loops["auto"] = reloader_loops["watchdog"]
+
+
+def ensure_echo_on():
+    """Ensure that echo mode is enabled. Some tools such as PDB disable
+    it which causes usability issues after reload."""
+    # tcgetattr will fail if stdin isn't a tty
+    if not sys.stdin.isatty():
+        return
+    try:
+        import termios
+    except ImportError:
+        return
+    attributes = termios.tcgetattr(sys.stdin)
+    if not attributes[3] & termios.ECHO:
+        attributes[3] |= termios.ECHO
+        termios.tcsetattr(sys.stdin, termios.TCSANOW, attributes)
+
+
+def run_with_reloader(main_func, extra_files=None, interval=1, reloader_type="auto"):
+    """Run the given function in an independent python interpreter."""
+    import signal
+
+    reloader = reloader_loops[reloader_type](extra_files, interval)
+    signal.signal(signal.SIGTERM, lambda *args: sys.exit(0))
+    try:
+        if os.environ.get("WERKZEUG_RUN_MAIN") == "true":
+            ensure_echo_on()
+            t = threading.Thread(target=main_func, args=())
+            t.setDaemon(True)
+            t.start()
+            reloader.run()
+        else:
+            sys.exit(reloader.restart_with_reloader())
+    except KeyboardInterrupt:
+        pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/datastructures.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/datastructures.py
new file mode 100644
index 0000000..480d73a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/datastructures.py
@@ -0,0 +1,3120 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.datastructures
+    ~~~~~~~~~~~~~~~~~~~~~~~
+
+    This module provides mixins and classes with an immutable interface.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import codecs
+import mimetypes
+import re
+from copy import deepcopy
+from itertools import repeat
+
+from . import exceptions
+from ._compat import BytesIO
+from ._compat import collections_abc
+from ._compat import fspath
+from ._compat import integer_types
+from ._compat import iteritems
+from ._compat import iterkeys
+from ._compat import iterlists
+from ._compat import itervalues
+from ._compat import make_literal_wrapper
+from ._compat import PY2
+from ._compat import string_types
+from ._compat import text_type
+from ._compat import to_native
+from ._internal import _missing
+from .filesystem import get_filesystem_encoding
+
+
+def is_immutable(self):
+    raise TypeError("%r objects are immutable" % self.__class__.__name__)
+
+
+def iter_multi_items(mapping):
+    """Iterates over the items of a mapping yielding keys and values
+    without dropping any from more complex structures.
+    """
+    if isinstance(mapping, MultiDict):
+        for item in iteritems(mapping, multi=True):
+            yield item
+    elif isinstance(mapping, dict):
+        for key, value in iteritems(mapping):
+            if isinstance(value, (tuple, list)):
+                for v in value:
+                    yield key, v
+            else:
+                yield key, value
+    else:
+        for item in mapping:
+            yield item
+
+
+def native_itermethods(names):
+    if not PY2:
+        return lambda x: x
+
+    def setviewmethod(cls, name):
+        viewmethod_name = "view%s" % name
+        repr_name = "view_%s" % name
+
+        def viewmethod(self, *a, **kw):
+            return ViewItems(self, name, repr_name, *a, **kw)
+
+        viewmethod.__name__ = viewmethod_name
+        viewmethod.__doc__ = "`%s()` object providing a view on %s" % (
+            viewmethod_name,
+            name,
+        )
+        setattr(cls, viewmethod_name, viewmethod)
+
+    def setitermethod(cls, name):
+        itermethod = getattr(cls, name)
+        setattr(cls, "iter%s" % name, itermethod)
+
+        def listmethod(self, *a, **kw):
+            return list(itermethod(self, *a, **kw))
+
+        listmethod.__name__ = name
+        listmethod.__doc__ = "Like :py:meth:`iter%s`, but returns a list." % name
+        setattr(cls, name, listmethod)
+
+    def wrap(cls):
+        for name in names:
+            setitermethod(cls, name)
+            setviewmethod(cls, name)
+        return cls
+
+    return wrap
+
+
+class ImmutableListMixin(object):
+    """Makes a :class:`list` immutable.
+
+    .. versionadded:: 0.5
+
+    :private:
+    """
+
+    _hash_cache = None
+
+    def __hash__(self):
+        if self._hash_cache is not None:
+            return self._hash_cache
+        rv = self._hash_cache = hash(tuple(self))
+        return rv
+
+    def __reduce_ex__(self, protocol):
+        return type(self), (list(self),)
+
+    def __delitem__(self, key):
+        is_immutable(self)
+
+    def __iadd__(self, other):
+        is_immutable(self)
+
+    __imul__ = __iadd__
+
+    def __setitem__(self, key, value):
+        is_immutable(self)
+
+    def append(self, item):
+        is_immutable(self)
+
+    remove = append
+
+    def extend(self, iterable):
+        is_immutable(self)
+
+    def insert(self, pos, value):
+        is_immutable(self)
+
+    def pop(self, index=-1):
+        is_immutable(self)
+
+    def reverse(self):
+        is_immutable(self)
+
+    def sort(self, cmp=None, key=None, reverse=None):
+        is_immutable(self)
+
+
+class ImmutableList(ImmutableListMixin, list):
+    """An immutable :class:`list`.
+
+    .. versionadded:: 0.5
+
+    :private:
+    """
+
+    def __repr__(self):
+        return "%s(%s)" % (self.__class__.__name__, list.__repr__(self))
+
+
+class ImmutableDictMixin(object):
+    """Makes a :class:`dict` immutable.
+
+    .. versionadded:: 0.5
+
+    :private:
+    """
+
+    _hash_cache = None
+
+    @classmethod
+    def fromkeys(cls, keys, value=None):
+        instance = super(cls, cls).__new__(cls)
+        instance.__init__(zip(keys, repeat(value)))
+        return instance
+
+    def __reduce_ex__(self, protocol):
+        return type(self), (dict(self),)
+
+    def _iter_hashitems(self):
+        return iteritems(self)
+
+    def __hash__(self):
+        if self._hash_cache is not None:
+            return self._hash_cache
+        rv = self._hash_cache = hash(frozenset(self._iter_hashitems()))
+        return rv
+
+    def setdefault(self, key, default=None):
+        is_immutable(self)
+
+    def update(self, *args, **kwargs):
+        is_immutable(self)
+
+    def pop(self, key, default=None):
+        is_immutable(self)
+
+    def popitem(self):
+        is_immutable(self)
+
+    def __setitem__(self, key, value):
+        is_immutable(self)
+
+    def __delitem__(self, key):
+        is_immutable(self)
+
+    def clear(self):
+        is_immutable(self)
+
+
+class ImmutableMultiDictMixin(ImmutableDictMixin):
+    """Makes a :class:`MultiDict` immutable.
+
+    .. versionadded:: 0.5
+
+    :private:
+    """
+
+    def __reduce_ex__(self, protocol):
+        return type(self), (list(iteritems(self, multi=True)),)
+
+    def _iter_hashitems(self):
+        return iteritems(self, multi=True)
+
+    def add(self, key, value):
+        is_immutable(self)
+
+    def popitemlist(self):
+        is_immutable(self)
+
+    def poplist(self, key):
+        is_immutable(self)
+
+    def setlist(self, key, new_list):
+        is_immutable(self)
+
+    def setlistdefault(self, key, default_list=None):
+        is_immutable(self)
+
+
+class UpdateDictMixin(object):
+    """Makes dicts call `self.on_update` on modifications.
+
+    .. versionadded:: 0.5
+
+    :private:
+    """
+
+    on_update = None
+
+    def calls_update(name):  # noqa: B902
+        def oncall(self, *args, **kw):
+            rv = getattr(super(UpdateDictMixin, self), name)(*args, **kw)
+            if self.on_update is not None:
+                self.on_update(self)
+            return rv
+
+        oncall.__name__ = name
+        return oncall
+
+    def setdefault(self, key, default=None):
+        modified = key not in self
+        rv = super(UpdateDictMixin, self).setdefault(key, default)
+        if modified and self.on_update is not None:
+            self.on_update(self)
+        return rv
+
+    def pop(self, key, default=_missing):
+        modified = key in self
+        if default is _missing:
+            rv = super(UpdateDictMixin, self).pop(key)
+        else:
+            rv = super(UpdateDictMixin, self).pop(key, default)
+        if modified and self.on_update is not None:
+            self.on_update(self)
+        return rv
+
+    __setitem__ = calls_update("__setitem__")
+    __delitem__ = calls_update("__delitem__")
+    clear = calls_update("clear")
+    popitem = calls_update("popitem")
+    update = calls_update("update")
+    del calls_update
+
+
+class TypeConversionDict(dict):
+    """Works like a regular dict but the :meth:`get` method can perform
+    type conversions.  :class:`MultiDict` and :class:`CombinedMultiDict`
+    are subclasses of this class and provide the same feature.
+
+    .. versionadded:: 0.5
+    """
+
+    def get(self, key, default=None, type=None):
+        """Return the default value if the requested data doesn't exist.
+        If `type` is provided and is a callable it should convert the value,
+        return it or raise a :exc:`ValueError` if that is not possible.  In
+        this case the function will return the default as if the value was not
+        found:
+
+        >>> d = TypeConversionDict(foo='42', bar='blub')
+        >>> d.get('foo', type=int)
+        42
+        >>> d.get('bar', -1, type=int)
+        -1
+
+        :param key: The key to be looked up.
+        :param default: The default value to be returned if the key can't
+                        be looked up.  If not further specified `None` is
+                        returned.
+        :param type: A callable that is used to cast the value in the
+                     :class:`MultiDict`.  If a :exc:`ValueError` is raised
+                     by this callable the default value is returned.
+        """
+        try:
+            rv = self[key]
+        except KeyError:
+            return default
+        if type is not None:
+            try:
+                rv = type(rv)
+            except ValueError:
+                rv = default
+        return rv
+
+
+class ImmutableTypeConversionDict(ImmutableDictMixin, TypeConversionDict):
+    """Works like a :class:`TypeConversionDict` but does not support
+    modifications.
+
+    .. versionadded:: 0.5
+    """
+
+    def copy(self):
+        """Return a shallow mutable copy of this object.  Keep in mind that
+        the standard library's :func:`copy` function is a no-op for this class
+        like for any other python immutable type (eg: :class:`tuple`).
+        """
+        return TypeConversionDict(self)
+
+    def __copy__(self):
+        return self
+
+
+class ViewItems(object):
+    def __init__(self, multi_dict, method, repr_name, *a, **kw):
+        self.__multi_dict = multi_dict
+        self.__method = method
+        self.__repr_name = repr_name
+        self.__a = a
+        self.__kw = kw
+
+    def __get_items(self):
+        return getattr(self.__multi_dict, self.__method)(*self.__a, **self.__kw)
+
+    def __repr__(self):
+        return "%s(%r)" % (self.__repr_name, list(self.__get_items()))
+
+    def __iter__(self):
+        return iter(self.__get_items())
+
+
+@native_itermethods(["keys", "values", "items", "lists", "listvalues"])
+class MultiDict(TypeConversionDict):
+    """A :class:`MultiDict` is a dictionary subclass customized to deal with
+    multiple values for the same key which is for example used by the parsing
+    functions in the wrappers.  This is necessary because some HTML form
+    elements pass multiple values for the same key.
+
+    :class:`MultiDict` implements all standard dictionary methods.
+    Internally, it saves all values for a key as a list, but the standard dict
+    access methods will only return the first value for a key. If you want to
+    gain access to the other values, too, you have to use the `list` methods as
+    explained below.
+
+    Basic Usage:
+
+    >>> d = MultiDict([('a', 'b'), ('a', 'c')])
+    >>> d
+    MultiDict([('a', 'b'), ('a', 'c')])
+    >>> d['a']
+    'b'
+    >>> d.getlist('a')
+    ['b', 'c']
+    >>> 'a' in d
+    True
+
+    It behaves like a normal dict thus all dict functions will only return the
+    first value when multiple values for one key are found.
+
+    From Werkzeug 0.3 onwards, the `KeyError` raised by this class is also a
+    subclass of the :exc:`~exceptions.BadRequest` HTTP exception and will
+    render a page for a ``400 BAD REQUEST`` if caught in a catch-all for HTTP
+    exceptions.
+
+    A :class:`MultiDict` can be constructed from an iterable of
+    ``(key, value)`` tuples, a dict, a :class:`MultiDict` or from Werkzeug 0.2
+    onwards some keyword parameters.
+
+    :param mapping: the initial value for the :class:`MultiDict`.  Either a
+                    regular dict, an iterable of ``(key, value)`` tuples
+                    or `None`.
+    """
+
+    def __init__(self, mapping=None):
+        if isinstance(mapping, MultiDict):
+            dict.__init__(self, ((k, l[:]) for k, l in iterlists(mapping)))
+        elif isinstance(mapping, dict):
+            tmp = {}
+            for key, value in iteritems(mapping):
+                if isinstance(value, (tuple, list)):
+                    if len(value) == 0:
+                        continue
+                    value = list(value)
+                else:
+                    value = [value]
+                tmp[key] = value
+            dict.__init__(self, tmp)
+        else:
+            tmp = {}
+            for key, value in mapping or ():
+                tmp.setdefault(key, []).append(value)
+            dict.__init__(self, tmp)
+
+    def __getstate__(self):
+        return dict(self.lists())
+
+    def __setstate__(self, value):
+        dict.clear(self)
+        dict.update(self, value)
+
+    def __getitem__(self, key):
+        """Return the first data value for this key;
+        raises KeyError if not found.
+
+        :param key: The key to be looked up.
+        :raise KeyError: if the key does not exist.
+        """
+
+        if key in self:
+            lst = dict.__getitem__(self, key)
+            if len(lst) > 0:
+                return lst[0]
+        raise exceptions.BadRequestKeyError(key)
+
+    def __setitem__(self, key, value):
+        """Like :meth:`add` but removes an existing key first.
+
+        :param key: the key for the value.
+        :param value: the value to set.
+        """
+        dict.__setitem__(self, key, [value])
+
+    def add(self, key, value):
+        """Adds a new value for the key.
+
+        .. versionadded:: 0.6
+
+        :param key: the key for the value.
+        :param value: the value to add.
+        """
+        dict.setdefault(self, key, []).append(value)
+
+    def getlist(self, key, type=None):
+        """Return the list of items for a given key. If that key is not in the
+        `MultiDict`, the return value will be an empty list.  Just as `get`
+        `getlist` accepts a `type` parameter.  All items will be converted
+        with the callable defined there.
+
+        :param key: The key to be looked up.
+        :param type: A callable that is used to cast the value in the
+                     :class:`MultiDict`.  If a :exc:`ValueError` is raised
+                     by this callable the value will be removed from the list.
+        :return: a :class:`list` of all the values for the key.
+        """
+        try:
+            rv = dict.__getitem__(self, key)
+        except KeyError:
+            return []
+        if type is None:
+            return list(rv)
+        result = []
+        for item in rv:
+            try:
+                result.append(type(item))
+            except ValueError:
+                pass
+        return result
+
+    def setlist(self, key, new_list):
+        """Remove the old values for a key and add new ones.  Note that the list
+        you pass the values in will be shallow-copied before it is inserted in
+        the dictionary.
+
+        >>> d = MultiDict()
+        >>> d.setlist('foo', ['1', '2'])
+        >>> d['foo']
+        '1'
+        >>> d.getlist('foo')
+        ['1', '2']
+
+        :param key: The key for which the values are set.
+        :param new_list: An iterable with the new values for the key.  Old values
+                         are removed first.
+        """
+        dict.__setitem__(self, key, list(new_list))
+
+    def setdefault(self, key, default=None):
+        """Returns the value for the key if it is in the dict, otherwise it
+        returns `default` and sets that value for `key`.
+
+        :param key: The key to be looked up.
+        :param default: The default value to be returned if the key is not
+                        in the dict.  If not further specified it's `None`.
+        """
+        if key not in self:
+            self[key] = default
+        else:
+            default = self[key]
+        return default
+
+    def setlistdefault(self, key, default_list=None):
+        """Like `setdefault` but sets multiple values.  The list returned
+        is not a copy, but the list that is actually used internally.  This
+        means that you can put new values into the dict by appending items
+        to the list:
+
+        >>> d = MultiDict({"foo": 1})
+        >>> d.setlistdefault("foo").extend([2, 3])
+        >>> d.getlist("foo")
+        [1, 2, 3]
+
+        :param key: The key to be looked up.
+        :param default_list: An iterable of default values.  It is either copied
+                             (in case it was a list) or converted into a list
+                             before returned.
+        :return: a :class:`list`
+        """
+        if key not in self:
+            default_list = list(default_list or ())
+            dict.__setitem__(self, key, default_list)
+        else:
+            default_list = dict.__getitem__(self, key)
+        return default_list
+
+    def items(self, multi=False):
+        """Return an iterator of ``(key, value)`` pairs.
+
+        :param multi: If set to `True` the iterator returned will have a pair
+                      for each value of each key.  Otherwise it will only
+                      contain pairs for the first value of each key.
+        """
+
+        for key, values in iteritems(dict, self):
+            if multi:
+                for value in values:
+                    yield key, value
+            else:
+                yield key, values[0]
+
+    def lists(self):
+        """Return a iterator of ``(key, values)`` pairs, where values is the list
+        of all values associated with the key."""
+
+        for key, values in iteritems(dict, self):
+            yield key, list(values)
+
+    def keys(self):
+        return iterkeys(dict, self)
+
+    __iter__ = keys
+
+    def values(self):
+        """Returns an iterator of the first value on every key's value list."""
+        for values in itervalues(dict, self):
+            yield values[0]
+
+    def listvalues(self):
+        """Return an iterator of all values associated with a key.  Zipping
+        :meth:`keys` and this is the same as calling :meth:`lists`:
+
+        >>> d = MultiDict({"foo": [1, 2, 3]})
+        >>> zip(d.keys(), d.listvalues()) == d.lists()
+        True
+        """
+
+        return itervalues(dict, self)
+
+    def copy(self):
+        """Return a shallow copy of this object."""
+        return self.__class__(self)
+
+    def deepcopy(self, memo=None):
+        """Return a deep copy of this object."""
+        return self.__class__(deepcopy(self.to_dict(flat=False), memo))
+
+    def to_dict(self, flat=True):
+        """Return the contents as regular dict.  If `flat` is `True` the
+        returned dict will only have the first item present, if `flat` is
+        `False` all values will be returned as lists.
+
+        :param flat: If set to `False` the dict returned will have lists
+                     with all the values in it.  Otherwise it will only
+                     contain the first value for each key.
+        :return: a :class:`dict`
+        """
+        if flat:
+            return dict(iteritems(self))
+        return dict(self.lists())
+
+    def update(self, other_dict):
+        """update() extends rather than replaces existing key lists:
+
+        >>> a = MultiDict({'x': 1})
+        >>> b = MultiDict({'x': 2, 'y': 3})
+        >>> a.update(b)
+        >>> a
+        MultiDict([('y', 3), ('x', 1), ('x', 2)])
+
+        If the value list for a key in ``other_dict`` is empty, no new values
+        will be added to the dict and the key will not be created:
+
+        >>> x = {'empty_list': []}
+        >>> y = MultiDict()
+        >>> y.update(x)
+        >>> y
+        MultiDict([])
+        """
+        for key, value in iter_multi_items(other_dict):
+            MultiDict.add(self, key, value)
+
+    def pop(self, key, default=_missing):
+        """Pop the first item for a list on the dict.  Afterwards the
+        key is removed from the dict, so additional values are discarded:
+
+        >>> d = MultiDict({"foo": [1, 2, 3]})
+        >>> d.pop("foo")
+        1
+        >>> "foo" in d
+        False
+
+        :param key: the key to pop.
+        :param default: if provided the value to return if the key was
+                        not in the dictionary.
+        """
+        try:
+            lst = dict.pop(self, key)
+
+            if len(lst) == 0:
+                raise exceptions.BadRequestKeyError(key)
+
+            return lst[0]
+        except KeyError:
+            if default is not _missing:
+                return default
+            raise exceptions.BadRequestKeyError(key)
+
+    def popitem(self):
+        """Pop an item from the dict."""
+        try:
+            item = dict.popitem(self)
+
+            if len(item[1]) == 0:
+                raise exceptions.BadRequestKeyError(item)
+
+            return (item[0], item[1][0])
+        except KeyError as e:
+            raise exceptions.BadRequestKeyError(e.args[0])
+
+    def poplist(self, key):
+        """Pop the list for a key from the dict.  If the key is not in the dict
+        an empty list is returned.
+
+        .. versionchanged:: 0.5
+           If the key does no longer exist a list is returned instead of
+           raising an error.
+        """
+        return dict.pop(self, key, [])
+
+    def popitemlist(self):
+        """Pop a ``(key, list)`` tuple from the dict."""
+        try:
+            return dict.popitem(self)
+        except KeyError as e:
+            raise exceptions.BadRequestKeyError(e.args[0])
+
+    def __copy__(self):
+        return self.copy()
+
+    def __deepcopy__(self, memo):
+        return self.deepcopy(memo=memo)
+
+    def __repr__(self):
+        return "%s(%r)" % (self.__class__.__name__, list(iteritems(self, multi=True)))
+
+
+class _omd_bucket(object):
+    """Wraps values in the :class:`OrderedMultiDict`.  This makes it
+    possible to keep an order over multiple different keys.  It requires
+    a lot of extra memory and slows down access a lot, but makes it
+    possible to access elements in O(1) and iterate in O(n).
+    """
+
+    __slots__ = ("prev", "key", "value", "next")
+
+    def __init__(self, omd, key, value):
+        self.prev = omd._last_bucket
+        self.key = key
+        self.value = value
+        self.next = None
+
+        if omd._first_bucket is None:
+            omd._first_bucket = self
+        if omd._last_bucket is not None:
+            omd._last_bucket.next = self
+        omd._last_bucket = self
+
+    def unlink(self, omd):
+        if self.prev:
+            self.prev.next = self.next
+        if self.next:
+            self.next.prev = self.prev
+        if omd._first_bucket is self:
+            omd._first_bucket = self.next
+        if omd._last_bucket is self:
+            omd._last_bucket = self.prev
+
+
+@native_itermethods(["keys", "values", "items", "lists", "listvalues"])
+class OrderedMultiDict(MultiDict):
+    """Works like a regular :class:`MultiDict` but preserves the
+    order of the fields.  To convert the ordered multi dict into a
+    list you can use the :meth:`items` method and pass it ``multi=True``.
+
+    In general an :class:`OrderedMultiDict` is an order of magnitude
+    slower than a :class:`MultiDict`.
+
+    .. admonition:: note
+
+       Due to a limitation in Python you cannot convert an ordered
+       multi dict into a regular dict by using ``dict(multidict)``.
+       Instead you have to use the :meth:`to_dict` method, otherwise
+       the internal bucket objects are exposed.
+    """
+
+    def __init__(self, mapping=None):
+        dict.__init__(self)
+        self._first_bucket = self._last_bucket = None
+        if mapping is not None:
+            OrderedMultiDict.update(self, mapping)
+
+    def __eq__(self, other):
+        if not isinstance(other, MultiDict):
+            return NotImplemented
+        if isinstance(other, OrderedMultiDict):
+            iter1 = iteritems(self, multi=True)
+            iter2 = iteritems(other, multi=True)
+            try:
+                for k1, v1 in iter1:
+                    k2, v2 = next(iter2)
+                    if k1 != k2 or v1 != v2:
+                        return False
+            except StopIteration:
+                return False
+            try:
+                next(iter2)
+            except StopIteration:
+                return True
+            return False
+        if len(self) != len(other):
+            return False
+        for key, values in iterlists(self):
+            if other.getlist(key) != values:
+                return False
+        return True
+
+    __hash__ = None
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __reduce_ex__(self, protocol):
+        return type(self), (list(iteritems(self, multi=True)),)
+
+    def __getstate__(self):
+        return list(iteritems(self, multi=True))
+
+    def __setstate__(self, values):
+        dict.clear(self)
+        for key, value in values:
+            self.add(key, value)
+
+    def __getitem__(self, key):
+        if key in self:
+            return dict.__getitem__(self, key)[0].value
+        raise exceptions.BadRequestKeyError(key)
+
+    def __setitem__(self, key, value):
+        self.poplist(key)
+        self.add(key, value)
+
+    def __delitem__(self, key):
+        self.pop(key)
+
+    def keys(self):
+        return (key for key, value in iteritems(self))
+
+    __iter__ = keys
+
+    def values(self):
+        return (value for key, value in iteritems(self))
+
+    def items(self, multi=False):
+        ptr = self._first_bucket
+        if multi:
+            while ptr is not None:
+                yield ptr.key, ptr.value
+                ptr = ptr.next
+        else:
+            returned_keys = set()
+            while ptr is not None:
+                if ptr.key not in returned_keys:
+                    returned_keys.add(ptr.key)
+                    yield ptr.key, ptr.value
+                ptr = ptr.next
+
+    def lists(self):
+        returned_keys = set()
+        ptr = self._first_bucket
+        while ptr is not None:
+            if ptr.key not in returned_keys:
+                yield ptr.key, self.getlist(ptr.key)
+                returned_keys.add(ptr.key)
+            ptr = ptr.next
+
+    def listvalues(self):
+        for _key, values in iterlists(self):
+            yield values
+
+    def add(self, key, value):
+        dict.setdefault(self, key, []).append(_omd_bucket(self, key, value))
+
+    def getlist(self, key, type=None):
+        try:
+            rv = dict.__getitem__(self, key)
+        except KeyError:
+            return []
+        if type is None:
+            return [x.value for x in rv]
+        result = []
+        for item in rv:
+            try:
+                result.append(type(item.value))
+            except ValueError:
+                pass
+        return result
+
+    def setlist(self, key, new_list):
+        self.poplist(key)
+        for value in new_list:
+            self.add(key, value)
+
+    def setlistdefault(self, key, default_list=None):
+        raise TypeError("setlistdefault is unsupported for ordered multi dicts")
+
+    def update(self, mapping):
+        for key, value in iter_multi_items(mapping):
+            OrderedMultiDict.add(self, key, value)
+
+    def poplist(self, key):
+        buckets = dict.pop(self, key, ())
+        for bucket in buckets:
+            bucket.unlink(self)
+        return [x.value for x in buckets]
+
+    def pop(self, key, default=_missing):
+        try:
+            buckets = dict.pop(self, key)
+        except KeyError:
+            if default is not _missing:
+                return default
+            raise exceptions.BadRequestKeyError(key)
+        for bucket in buckets:
+            bucket.unlink(self)
+        return buckets[0].value
+
+    def popitem(self):
+        try:
+            key, buckets = dict.popitem(self)
+        except KeyError as e:
+            raise exceptions.BadRequestKeyError(e.args[0])
+        for bucket in buckets:
+            bucket.unlink(self)
+        return key, buckets[0].value
+
+    def popitemlist(self):
+        try:
+            key, buckets = dict.popitem(self)
+        except KeyError as e:
+            raise exceptions.BadRequestKeyError(e.args[0])
+        for bucket in buckets:
+            bucket.unlink(self)
+        return key, [x.value for x in buckets]
+
+
+def _options_header_vkw(value, kw):
+    return dump_options_header(
+        value, dict((k.replace("_", "-"), v) for k, v in kw.items())
+    )
+
+
+def _unicodify_header_value(value):
+    if isinstance(value, bytes):
+        value = value.decode("latin-1")
+    if not isinstance(value, text_type):
+        value = text_type(value)
+    return value
+
+
+@native_itermethods(["keys", "values", "items"])
+class Headers(object):
+    """An object that stores some headers.  It has a dict-like interface
+    but is ordered and can store the same keys multiple times.
+
+    This data structure is useful if you want a nicer way to handle WSGI
+    headers which are stored as tuples in a list.
+
+    From Werkzeug 0.3 onwards, the :exc:`KeyError` raised by this class is
+    also a subclass of the :class:`~exceptions.BadRequest` HTTP exception
+    and will render a page for a ``400 BAD REQUEST`` if caught in a
+    catch-all for HTTP exceptions.
+
+    Headers is mostly compatible with the Python :class:`wsgiref.headers.Headers`
+    class, with the exception of `__getitem__`.  :mod:`wsgiref` will return
+    `None` for ``headers['missing']``, whereas :class:`Headers` will raise
+    a :class:`KeyError`.
+
+    To create a new :class:`Headers` object pass it a list or dict of headers
+    which are used as default values.  This does not reuse the list passed
+    to the constructor for internal usage.
+
+    :param defaults: The list of default values for the :class:`Headers`.
+
+    .. versionchanged:: 0.9
+       This data structure now stores unicode values similar to how the
+       multi dicts do it.  The main difference is that bytes can be set as
+       well which will automatically be latin1 decoded.
+
+    .. versionchanged:: 0.9
+       The :meth:`linked` function was removed without replacement as it
+       was an API that does not support the changes to the encoding model.
+    """
+
+    def __init__(self, defaults=None):
+        self._list = []
+        if defaults is not None:
+            if isinstance(defaults, (list, Headers)):
+                self._list.extend(defaults)
+            else:
+                self.extend(defaults)
+
+    def __getitem__(self, key, _get_mode=False):
+        if not _get_mode:
+            if isinstance(key, integer_types):
+                return self._list[key]
+            elif isinstance(key, slice):
+                return self.__class__(self._list[key])
+        if not isinstance(key, string_types):
+            raise exceptions.BadRequestKeyError(key)
+        ikey = key.lower()
+        for k, v in self._list:
+            if k.lower() == ikey:
+                return v
+        # micro optimization: if we are in get mode we will catch that
+        # exception one stack level down so we can raise a standard
+        # key error instead of our special one.
+        if _get_mode:
+            raise KeyError()
+        raise exceptions.BadRequestKeyError(key)
+
+    def __eq__(self, other):
+        def lowered(item):
+            return (item[0].lower(),) + item[1:]
+
+        return other.__class__ is self.__class__ and set(
+            map(lowered, other._list)
+        ) == set(map(lowered, self._list))
+
+    __hash__ = None
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def get(self, key, default=None, type=None, as_bytes=False):
+        """Return the default value if the requested data doesn't exist.
+        If `type` is provided and is a callable it should convert the value,
+        return it or raise a :exc:`ValueError` if that is not possible.  In
+        this case the function will return the default as if the value was not
+        found:
+
+        >>> d = Headers([('Content-Length', '42')])
+        >>> d.get('Content-Length', type=int)
+        42
+
+        If a headers object is bound you must not add unicode strings
+        because no encoding takes place.
+
+        .. versionadded:: 0.9
+           Added support for `as_bytes`.
+
+        :param key: The key to be looked up.
+        :param default: The default value to be returned if the key can't
+                        be looked up.  If not further specified `None` is
+                        returned.
+        :param type: A callable that is used to cast the value in the
+                     :class:`Headers`.  If a :exc:`ValueError` is raised
+                     by this callable the default value is returned.
+        :param as_bytes: return bytes instead of unicode strings.
+        """
+        try:
+            rv = self.__getitem__(key, _get_mode=True)
+        except KeyError:
+            return default
+        if as_bytes:
+            rv = rv.encode("latin1")
+        if type is None:
+            return rv
+        try:
+            return type(rv)
+        except ValueError:
+            return default
+
+    def getlist(self, key, type=None, as_bytes=False):
+        """Return the list of items for a given key. If that key is not in the
+        :class:`Headers`, the return value will be an empty list.  Just as
+        :meth:`get` :meth:`getlist` accepts a `type` parameter.  All items will
+        be converted with the callable defined there.
+
+        .. versionadded:: 0.9
+           Added support for `as_bytes`.
+
+        :param key: The key to be looked up.
+        :param type: A callable that is used to cast the value in the
+                     :class:`Headers`.  If a :exc:`ValueError` is raised
+                     by this callable the value will be removed from the list.
+        :return: a :class:`list` of all the values for the key.
+        :param as_bytes: return bytes instead of unicode strings.
+        """
+        ikey = key.lower()
+        result = []
+        for k, v in self:
+            if k.lower() == ikey:
+                if as_bytes:
+                    v = v.encode("latin1")
+                if type is not None:
+                    try:
+                        v = type(v)
+                    except ValueError:
+                        continue
+                result.append(v)
+        return result
+
+    def get_all(self, name):
+        """Return a list of all the values for the named field.
+
+        This method is compatible with the :mod:`wsgiref`
+        :meth:`~wsgiref.headers.Headers.get_all` method.
+        """
+        return self.getlist(name)
+
+    def items(self, lower=False):
+        for key, value in self:
+            if lower:
+                key = key.lower()
+            yield key, value
+
+    def keys(self, lower=False):
+        for key, _ in iteritems(self, lower):
+            yield key
+
+    def values(self):
+        for _, value in iteritems(self):
+            yield value
+
+    def extend(self, *args, **kwargs):
+        """Extend headers in this object with items from another object
+        containing header items as well as keyword arguments.
+
+        To replace existing keys instead of extending, use
+        :meth:`update` instead.
+
+        If provided, the first argument can be another :class:`Headers`
+        object, a :class:`MultiDict`, :class:`dict`, or iterable of
+        pairs.
+
+        .. versionchanged:: 1.0
+            Support :class:`MultiDict`. Allow passing ``kwargs``.
+        """
+        if len(args) > 1:
+            raise TypeError("update expected at most 1 arguments, got %d" % len(args))
+
+        if args:
+            for key, value in iter_multi_items(args[0]):
+                self.add(key, value)
+
+        for key, value in iter_multi_items(kwargs):
+            self.add(key, value)
+
+    def __delitem__(self, key, _index_operation=True):
+        if _index_operation and isinstance(key, (integer_types, slice)):
+            del self._list[key]
+            return
+        key = key.lower()
+        new = []
+        for k, v in self._list:
+            if k.lower() != key:
+                new.append((k, v))
+        self._list[:] = new
+
+    def remove(self, key):
+        """Remove a key.
+
+        :param key: The key to be removed.
+        """
+        return self.__delitem__(key, _index_operation=False)
+
+    def pop(self, key=None, default=_missing):
+        """Removes and returns a key or index.
+
+        :param key: The key to be popped.  If this is an integer the item at
+                    that position is removed, if it's a string the value for
+                    that key is.  If the key is omitted or `None` the last
+                    item is removed.
+        :return: an item.
+        """
+        if key is None:
+            return self._list.pop()
+        if isinstance(key, integer_types):
+            return self._list.pop(key)
+        try:
+            rv = self[key]
+            self.remove(key)
+        except KeyError:
+            if default is not _missing:
+                return default
+            raise
+        return rv
+
+    def popitem(self):
+        """Removes a key or index and returns a (key, value) item."""
+        return self.pop()
+
+    def __contains__(self, key):
+        """Check if a key is present."""
+        try:
+            self.__getitem__(key, _get_mode=True)
+        except KeyError:
+            return False
+        return True
+
+    has_key = __contains__
+
+    def __iter__(self):
+        """Yield ``(key, value)`` tuples."""
+        return iter(self._list)
+
+    def __len__(self):
+        return len(self._list)
+
+    def add(self, _key, _value, **kw):
+        """Add a new header tuple to the list.
+
+        Keyword arguments can specify additional parameters for the header
+        value, with underscores converted to dashes::
+
+        >>> d = Headers()
+        >>> d.add('Content-Type', 'text/plain')
+        >>> d.add('Content-Disposition', 'attachment', filename='foo.png')
+
+        The keyword argument dumping uses :func:`dump_options_header`
+        behind the scenes.
+
+        .. versionadded:: 0.4.1
+            keyword arguments were added for :mod:`wsgiref` compatibility.
+        """
+        if kw:
+            _value = _options_header_vkw(_value, kw)
+        _key = _unicodify_header_value(_key)
+        _value = _unicodify_header_value(_value)
+        self._validate_value(_value)
+        self._list.append((_key, _value))
+
+    def _validate_value(self, value):
+        if not isinstance(value, text_type):
+            raise TypeError("Value should be unicode.")
+        if u"\n" in value or u"\r" in value:
+            raise ValueError(
+                "Detected newline in header value.  This is "
+                "a potential security problem"
+            )
+
+    def add_header(self, _key, _value, **_kw):
+        """Add a new header tuple to the list.
+
+        An alias for :meth:`add` for compatibility with the :mod:`wsgiref`
+        :meth:`~wsgiref.headers.Headers.add_header` method.
+        """
+        self.add(_key, _value, **_kw)
+
+    def clear(self):
+        """Clears all headers."""
+        del self._list[:]
+
+    def set(self, _key, _value, **kw):
+        """Remove all header tuples for `key` and add a new one.  The newly
+        added key either appears at the end of the list if there was no
+        entry or replaces the first one.
+
+        Keyword arguments can specify additional parameters for the header
+        value, with underscores converted to dashes.  See :meth:`add` for
+        more information.
+
+        .. versionchanged:: 0.6.1
+           :meth:`set` now accepts the same arguments as :meth:`add`.
+
+        :param key: The key to be inserted.
+        :param value: The value to be inserted.
+        """
+        if kw:
+            _value = _options_header_vkw(_value, kw)
+        _key = _unicodify_header_value(_key)
+        _value = _unicodify_header_value(_value)
+        self._validate_value(_value)
+        if not self._list:
+            self._list.append((_key, _value))
+            return
+        listiter = iter(self._list)
+        ikey = _key.lower()
+        for idx, (old_key, _old_value) in enumerate(listiter):
+            if old_key.lower() == ikey:
+                # replace first occurrence
+                self._list[idx] = (_key, _value)
+                break
+        else:
+            self._list.append((_key, _value))
+            return
+        self._list[idx + 1 :] = [t for t in listiter if t[0].lower() != ikey]
+
+    def setlist(self, key, values):
+        """Remove any existing values for a header and add new ones.
+
+        :param key: The header key to set.
+        :param values: An iterable of values to set for the key.
+
+        .. versionadded:: 1.0
+        """
+        if values:
+            values_iter = iter(values)
+            self.set(key, next(values_iter))
+
+            for value in values_iter:
+                self.add(key, value)
+        else:
+            self.remove(key)
+
+    def setdefault(self, key, default):
+        """Return the first value for the key if it is in the headers,
+        otherwise set the header to the value given by ``default`` and
+        return that.
+
+        :param key: The header key to get.
+        :param default: The value to set for the key if it is not in the
+            headers.
+        """
+        if key in self:
+            return self[key]
+
+        self.set(key, default)
+        return default
+
+    def setlistdefault(self, key, default):
+        """Return the list of values for the key if it is in the
+        headers, otherwise set the header to the list of values given
+        by ``default`` and return that.
+
+        Unlike :meth:`MultiDict.setlistdefault`, modifying the returned
+        list will not affect the headers.
+
+        :param key: The header key to get.
+        :param default: An iterable of values to set for the key if it
+            is not in the headers.
+
+        .. versionadded:: 1.0
+        """
+        if key not in self:
+            self.setlist(key, default)
+
+        return self.getlist(key)
+
+    def __setitem__(self, key, value):
+        """Like :meth:`set` but also supports index/slice based setting."""
+        if isinstance(key, (slice, integer_types)):
+            if isinstance(key, integer_types):
+                value = [value]
+            value = [
+                (_unicodify_header_value(k), _unicodify_header_value(v))
+                for (k, v) in value
+            ]
+            [self._validate_value(v) for (k, v) in value]
+            if isinstance(key, integer_types):
+                self._list[key] = value[0]
+            else:
+                self._list[key] = value
+        else:
+            self.set(key, value)
+
+    def update(self, *args, **kwargs):
+        """Replace headers in this object with items from another
+        headers object and keyword arguments.
+
+        To extend existing keys instead of replacing, use :meth:`extend`
+        instead.
+
+        If provided, the first argument can be another :class:`Headers`
+        object, a :class:`MultiDict`, :class:`dict`, or iterable of
+        pairs.
+
+        .. versionadded:: 1.0
+        """
+        if len(args) > 1:
+            raise TypeError("update expected at most 1 arguments, got %d" % len(args))
+
+        if args:
+            mapping = args[0]
+
+            if isinstance(mapping, (Headers, MultiDict)):
+                for key in mapping.keys():
+                    self.setlist(key, mapping.getlist(key))
+            elif isinstance(mapping, dict):
+                for key, value in iteritems(mapping):
+                    if isinstance(value, (list, tuple)):
+                        self.setlist(key, value)
+                    else:
+                        self.set(key, value)
+            else:
+                for key, value in mapping:
+                    self.set(key, value)
+
+        for key, value in iteritems(kwargs):
+            if isinstance(value, (list, tuple)):
+                self.setlist(key, value)
+            else:
+                self.set(key, value)
+
+    def to_wsgi_list(self):
+        """Convert the headers into a list suitable for WSGI.
+
+        The values are byte strings in Python 2 converted to latin1 and unicode
+        strings in Python 3 for the WSGI server to encode.
+
+        :return: list
+        """
+        if PY2:
+            return [(to_native(k), v.encode("latin1")) for k, v in self]
+        return list(self)
+
+    def copy(self):
+        return self.__class__(self._list)
+
+    def __copy__(self):
+        return self.copy()
+
+    def __str__(self):
+        """Returns formatted headers suitable for HTTP transmission."""
+        strs = []
+        for key, value in self.to_wsgi_list():
+            strs.append("%s: %s" % (key, value))
+        strs.append("\r\n")
+        return "\r\n".join(strs)
+
+    def __repr__(self):
+        return "%s(%r)" % (self.__class__.__name__, list(self))
+
+
+class ImmutableHeadersMixin(object):
+    """Makes a :class:`Headers` immutable.  We do not mark them as
+    hashable though since the only usecase for this datastructure
+    in Werkzeug is a view on a mutable structure.
+
+    .. versionadded:: 0.5
+
+    :private:
+    """
+
+    def __delitem__(self, key, **kwargs):
+        is_immutable(self)
+
+    def __setitem__(self, key, value):
+        is_immutable(self)
+
+    def set(self, key, value):
+        is_immutable(self)
+
+    def setlist(self, key, value):
+        is_immutable(self)
+
+    def add(self, item):
+        is_immutable(self)
+
+    def add_header(self, item):
+        is_immutable(self)
+
+    def remove(self, item):
+        is_immutable(self)
+
+    def extend(self, *args, **kwargs):
+        is_immutable(self)
+
+    def update(self, *args, **kwargs):
+        is_immutable(self)
+
+    def insert(self, pos, value):
+        is_immutable(self)
+
+    def pop(self, index=-1):
+        is_immutable(self)
+
+    def popitem(self):
+        is_immutable(self)
+
+    def setdefault(self, key, default):
+        is_immutable(self)
+
+    def setlistdefault(self, key, default):
+        is_immutable(self)
+
+
+class EnvironHeaders(ImmutableHeadersMixin, Headers):
+    """Read only version of the headers from a WSGI environment.  This
+    provides the same interface as `Headers` and is constructed from
+    a WSGI environment.
+
+    From Werkzeug 0.3 onwards, the `KeyError` raised by this class is also a
+    subclass of the :exc:`~exceptions.BadRequest` HTTP exception and will
+    render a page for a ``400 BAD REQUEST`` if caught in a catch-all for
+    HTTP exceptions.
+    """
+
+    def __init__(self, environ):
+        self.environ = environ
+
+    def __eq__(self, other):
+        return self.environ is other.environ
+
+    __hash__ = None
+
+    def __getitem__(self, key, _get_mode=False):
+        # _get_mode is a no-op for this class as there is no index but
+        # used because get() calls it.
+        if not isinstance(key, string_types):
+            raise KeyError(key)
+        key = key.upper().replace("-", "_")
+        if key in ("CONTENT_TYPE", "CONTENT_LENGTH"):
+            return _unicodify_header_value(self.environ[key])
+        return _unicodify_header_value(self.environ["HTTP_" + key])
+
+    def __len__(self):
+        # the iter is necessary because otherwise list calls our
+        # len which would call list again and so forth.
+        return len(list(iter(self)))
+
+    def __iter__(self):
+        for key, value in iteritems(self.environ):
+            if key.startswith("HTTP_") and key not in (
+                "HTTP_CONTENT_TYPE",
+                "HTTP_CONTENT_LENGTH",
+            ):
+                yield (
+                    key[5:].replace("_", "-").title(),
+                    _unicodify_header_value(value),
+                )
+            elif key in ("CONTENT_TYPE", "CONTENT_LENGTH") and value:
+                yield (key.replace("_", "-").title(), _unicodify_header_value(value))
+
+    def copy(self):
+        raise TypeError("cannot create %r copies" % self.__class__.__name__)
+
+
+@native_itermethods(["keys", "values", "items", "lists", "listvalues"])
+class CombinedMultiDict(ImmutableMultiDictMixin, MultiDict):
+    """A read only :class:`MultiDict` that you can pass multiple :class:`MultiDict`
+    instances as sequence and it will combine the return values of all wrapped
+    dicts:
+
+    >>> from werkzeug.datastructures import CombinedMultiDict, MultiDict
+    >>> post = MultiDict([('foo', 'bar')])
+    >>> get = MultiDict([('blub', 'blah')])
+    >>> combined = CombinedMultiDict([get, post])
+    >>> combined['foo']
+    'bar'
+    >>> combined['blub']
+    'blah'
+
+    This works for all read operations and will raise a `TypeError` for
+    methods that usually change data which isn't possible.
+
+    From Werkzeug 0.3 onwards, the `KeyError` raised by this class is also a
+    subclass of the :exc:`~exceptions.BadRequest` HTTP exception and will
+    render a page for a ``400 BAD REQUEST`` if caught in a catch-all for HTTP
+    exceptions.
+    """
+
+    def __reduce_ex__(self, protocol):
+        return type(self), (self.dicts,)
+
+    def __init__(self, dicts=None):
+        self.dicts = dicts or []
+
+    @classmethod
+    def fromkeys(cls):
+        raise TypeError("cannot create %r instances by fromkeys" % cls.__name__)
+
+    def __getitem__(self, key):
+        for d in self.dicts:
+            if key in d:
+                return d[key]
+        raise exceptions.BadRequestKeyError(key)
+
+    def get(self, key, default=None, type=None):
+        for d in self.dicts:
+            if key in d:
+                if type is not None:
+                    try:
+                        return type(d[key])
+                    except ValueError:
+                        continue
+                return d[key]
+        return default
+
+    def getlist(self, key, type=None):
+        rv = []
+        for d in self.dicts:
+            rv.extend(d.getlist(key, type))
+        return rv
+
+    def _keys_impl(self):
+        """This function exists so __len__ can be implemented more efficiently,
+        saving one list creation from an iterator.
+
+        Using this for Python 2's ``dict.keys`` behavior would be useless since
+        `dict.keys` in Python 2 returns a list, while we have a set here.
+        """
+        rv = set()
+        for d in self.dicts:
+            rv.update(iterkeys(d))
+        return rv
+
+    def keys(self):
+        return iter(self._keys_impl())
+
+    __iter__ = keys
+
+    def items(self, multi=False):
+        found = set()
+        for d in self.dicts:
+            for key, value in iteritems(d, multi):
+                if multi:
+                    yield key, value
+                elif key not in found:
+                    found.add(key)
+                    yield key, value
+
+    def values(self):
+        for _key, value in iteritems(self):
+            yield value
+
+    def lists(self):
+        rv = {}
+        for d in self.dicts:
+            for key, values in iterlists(d):
+                rv.setdefault(key, []).extend(values)
+        return iteritems(rv)
+
+    def listvalues(self):
+        return (x[1] for x in self.lists())
+
+    def copy(self):
+        """Return a shallow mutable copy of this object.
+
+        This returns a :class:`MultiDict` representing the data at the
+        time of copying. The copy will no longer reflect changes to the
+        wrapped dicts.
+
+        .. versionchanged:: 0.15
+            Return a mutable :class:`MultiDict`.
+        """
+        return MultiDict(self)
+
+    def to_dict(self, flat=True):
+        """Return the contents as regular dict.  If `flat` is `True` the
+        returned dict will only have the first item present, if `flat` is
+        `False` all values will be returned as lists.
+
+        :param flat: If set to `False` the dict returned will have lists
+                     with all the values in it.  Otherwise it will only
+                     contain the first item for each key.
+        :return: a :class:`dict`
+        """
+        rv = {}
+        for d in reversed(self.dicts):
+            rv.update(d.to_dict(flat))
+        return rv
+
+    def __len__(self):
+        return len(self._keys_impl())
+
+    def __contains__(self, key):
+        for d in self.dicts:
+            if key in d:
+                return True
+        return False
+
+    has_key = __contains__
+
+    def __repr__(self):
+        return "%s(%r)" % (self.__class__.__name__, self.dicts)
+
+
+class FileMultiDict(MultiDict):
+    """A special :class:`MultiDict` that has convenience methods to add
+    files to it.  This is used for :class:`EnvironBuilder` and generally
+    useful for unittesting.
+
+    .. versionadded:: 0.5
+    """
+
+    def add_file(self, name, file, filename=None, content_type=None):
+        """Adds a new file to the dict.  `file` can be a file name or
+        a :class:`file`-like or a :class:`FileStorage` object.
+
+        :param name: the name of the field.
+        :param file: a filename or :class:`file`-like object
+        :param filename: an optional filename
+        :param content_type: an optional content type
+        """
+        if isinstance(file, FileStorage):
+            value = file
+        else:
+            if isinstance(file, string_types):
+                if filename is None:
+                    filename = file
+                file = open(file, "rb")
+            if filename and content_type is None:
+                content_type = (
+                    mimetypes.guess_type(filename)[0] or "application/octet-stream"
+                )
+            value = FileStorage(file, filename, name, content_type)
+
+        self.add(name, value)
+
+
+class ImmutableDict(ImmutableDictMixin, dict):
+    """An immutable :class:`dict`.
+
+    .. versionadded:: 0.5
+    """
+
+    def __repr__(self):
+        return "%s(%s)" % (self.__class__.__name__, dict.__repr__(self))
+
+    def copy(self):
+        """Return a shallow mutable copy of this object.  Keep in mind that
+        the standard library's :func:`copy` function is a no-op for this class
+        like for any other python immutable type (eg: :class:`tuple`).
+        """
+        return dict(self)
+
+    def __copy__(self):
+        return self
+
+
+class ImmutableMultiDict(ImmutableMultiDictMixin, MultiDict):
+    """An immutable :class:`MultiDict`.
+
+    .. versionadded:: 0.5
+    """
+
+    def copy(self):
+        """Return a shallow mutable copy of this object.  Keep in mind that
+        the standard library's :func:`copy` function is a no-op for this class
+        like for any other python immutable type (eg: :class:`tuple`).
+        """
+        return MultiDict(self)
+
+    def __copy__(self):
+        return self
+
+
+class ImmutableOrderedMultiDict(ImmutableMultiDictMixin, OrderedMultiDict):
+    """An immutable :class:`OrderedMultiDict`.
+
+    .. versionadded:: 0.6
+    """
+
+    def _iter_hashitems(self):
+        return enumerate(iteritems(self, multi=True))
+
+    def copy(self):
+        """Return a shallow mutable copy of this object.  Keep in mind that
+        the standard library's :func:`copy` function is a no-op for this class
+        like for any other python immutable type (eg: :class:`tuple`).
+        """
+        return OrderedMultiDict(self)
+
+    def __copy__(self):
+        return self
+
+
+@native_itermethods(["values"])
+class Accept(ImmutableList):
+    """An :class:`Accept` object is just a list subclass for lists of
+    ``(value, quality)`` tuples.  It is automatically sorted by specificity
+    and quality.
+
+    All :class:`Accept` objects work similar to a list but provide extra
+    functionality for working with the data.  Containment checks are
+    normalized to the rules of that header:
+
+    >>> a = CharsetAccept([('ISO-8859-1', 1), ('utf-8', 0.7)])
+    >>> a.best
+    'ISO-8859-1'
+    >>> 'iso-8859-1' in a
+    True
+    >>> 'UTF8' in a
+    True
+    >>> 'utf7' in a
+    False
+
+    To get the quality for an item you can use normal item lookup:
+
+    >>> print a['utf-8']
+    0.7
+    >>> a['utf7']
+    0
+
+    .. versionchanged:: 0.5
+       :class:`Accept` objects are forced immutable now.
+
+    .. versionchanged:: 1.0.0
+       :class:`Accept` internal values are no longer ordered
+       alphabetically for equal quality tags. Instead the initial
+       order is preserved.
+
+    """
+
+    def __init__(self, values=()):
+        if values is None:
+            list.__init__(self)
+            self.provided = False
+        elif isinstance(values, Accept):
+            self.provided = values.provided
+            list.__init__(self, values)
+        else:
+            self.provided = True
+            values = sorted(
+                values, key=lambda x: (self._specificity(x[0]), x[1]), reverse=True,
+            )
+            list.__init__(self, values)
+
+    def _specificity(self, value):
+        """Returns a tuple describing the value's specificity."""
+        return (value != "*",)
+
+    def _value_matches(self, value, item):
+        """Check if a value matches a given accept item."""
+        return item == "*" or item.lower() == value.lower()
+
+    def __getitem__(self, key):
+        """Besides index lookup (getting item n) you can also pass it a string
+        to get the quality for the item.  If the item is not in the list, the
+        returned quality is ``0``.
+        """
+        if isinstance(key, string_types):
+            return self.quality(key)
+        return list.__getitem__(self, key)
+
+    def quality(self, key):
+        """Returns the quality of the key.
+
+        .. versionadded:: 0.6
+           In previous versions you had to use the item-lookup syntax
+           (eg: ``obj[key]`` instead of ``obj.quality(key)``)
+        """
+        for item, quality in self:
+            if self._value_matches(key, item):
+                return quality
+        return 0
+
+    def __contains__(self, value):
+        for item, _quality in self:
+            if self._value_matches(value, item):
+                return True
+        return False
+
+    def __repr__(self):
+        return "%s([%s])" % (
+            self.__class__.__name__,
+            ", ".join("(%r, %s)" % (x, y) for x, y in self),
+        )
+
+    def index(self, key):
+        """Get the position of an entry or raise :exc:`ValueError`.
+
+        :param key: The key to be looked up.
+
+        .. versionchanged:: 0.5
+           This used to raise :exc:`IndexError`, which was inconsistent
+           with the list API.
+        """
+        if isinstance(key, string_types):
+            for idx, (item, _quality) in enumerate(self):
+                if self._value_matches(key, item):
+                    return idx
+            raise ValueError(key)
+        return list.index(self, key)
+
+    def find(self, key):
+        """Get the position of an entry or return -1.
+
+        :param key: The key to be looked up.
+        """
+        try:
+            return self.index(key)
+        except ValueError:
+            return -1
+
+    def values(self):
+        """Iterate over all values."""
+        for item in self:
+            yield item[0]
+
+    def to_header(self):
+        """Convert the header set into an HTTP header string."""
+        result = []
+        for value, quality in self:
+            if quality != 1:
+                value = "%s;q=%s" % (value, quality)
+            result.append(value)
+        return ",".join(result)
+
+    def __str__(self):
+        return self.to_header()
+
+    def _best_single_match(self, match):
+        for client_item, quality in self:
+            if self._value_matches(match, client_item):
+                # self is sorted by specificity descending, we can exit
+                return client_item, quality
+
+    def best_match(self, matches, default=None):
+        """Returns the best match from a list of possible matches based
+        on the specificity and quality of the client. If two items have the
+        same quality and specificity, the one is returned that comes first.
+
+        :param matches: a list of matches to check for
+        :param default: the value that is returned if none match
+        """
+        result = default
+        best_quality = -1
+        best_specificity = (-1,)
+        for server_item in matches:
+            match = self._best_single_match(server_item)
+            if not match:
+                continue
+            client_item, quality = match
+            specificity = self._specificity(client_item)
+            if quality <= 0 or quality < best_quality:
+                continue
+            # better quality or same quality but more specific => better match
+            if quality > best_quality or specificity > best_specificity:
+                result = server_item
+                best_quality = quality
+                best_specificity = specificity
+        return result
+
+    @property
+    def best(self):
+        """The best match as value."""
+        if self:
+            return self[0][0]
+
+
+_mime_split_re = re.compile(r"/|(?:\s*;\s*)")
+
+
+def _normalize_mime(value):
+    return _mime_split_re.split(value.lower())
+
+
+class MIMEAccept(Accept):
+    """Like :class:`Accept` but with special methods and behavior for
+    mimetypes.
+    """
+
+    def _specificity(self, value):
+        return tuple(x != "*" for x in _mime_split_re.split(value))
+
+    def _value_matches(self, value, item):
+        # item comes from the client, can't match if it's invalid.
+        if "/" not in item:
+            return False
+
+        # value comes from the application, tell the developer when it
+        # doesn't look valid.
+        if "/" not in value:
+            raise ValueError("invalid mimetype %r" % value)
+
+        # Split the match value into type, subtype, and a sorted list of parameters.
+        normalized_value = _normalize_mime(value)
+        value_type, value_subtype = normalized_value[:2]
+        value_params = sorted(normalized_value[2:])
+
+        # "*/*" is the only valid value that can start with "*".
+        if value_type == "*" and value_subtype != "*":
+            raise ValueError("invalid mimetype %r" % value)
+
+        # Split the accept item into type, subtype, and parameters.
+        normalized_item = _normalize_mime(item)
+        item_type, item_subtype = normalized_item[:2]
+        item_params = sorted(normalized_item[2:])
+
+        # "*/not-*" from the client is invalid, can't match.
+        if item_type == "*" and item_subtype != "*":
+            return False
+
+        return (
+            (item_type == "*" and item_subtype == "*")
+            or (value_type == "*" and value_subtype == "*")
+        ) or (
+            item_type == value_type
+            and (
+                item_subtype == "*"
+                or value_subtype == "*"
+                or (item_subtype == value_subtype and item_params == value_params)
+            )
+        )
+
+    @property
+    def accept_html(self):
+        """True if this object accepts HTML."""
+        return (
+            "text/html" in self or "application/xhtml+xml" in self or self.accept_xhtml
+        )
+
+    @property
+    def accept_xhtml(self):
+        """True if this object accepts XHTML."""
+        return "application/xhtml+xml" in self or "application/xml" in self
+
+    @property
+    def accept_json(self):
+        """True if this object accepts JSON."""
+        return "application/json" in self
+
+
+_locale_delim_re = re.compile(r"[_-]")
+
+
+def _normalize_lang(value):
+    """Process a language tag for matching."""
+    return _locale_delim_re.split(value.lower())
+
+
+class LanguageAccept(Accept):
+    """Like :class:`Accept` but with normalization for language tags."""
+
+    def _value_matches(self, value, item):
+        return item == "*" or _normalize_lang(value) == _normalize_lang(item)
+
+    def best_match(self, matches, default=None):
+        """Given a list of supported values, finds the best match from
+        the list of accepted values.
+
+        Language tags are normalized for the purpose of matching, but
+        are returned unchanged.
+
+        If no exact match is found, this will fall back to matching
+        the first subtag (primary language only), first with the
+        accepted values then with the match values. This partial is not
+        applied to any other language subtags.
+
+        The default is returned if no exact or fallback match is found.
+
+        :param matches: A list of supported languages to find a match.
+        :param default: The value that is returned if none match.
+        """
+        # Look for an exact match first. If a client accepts "en-US",
+        # "en-US" is a valid match at this point.
+        result = super(LanguageAccept, self).best_match(matches)
+
+        if result is not None:
+            return result
+
+        # Fall back to accepting primary tags. If a client accepts
+        # "en-US", "en" is a valid match at this point. Need to use
+        # re.split to account for 2 or 3 letter codes.
+        fallback = Accept(
+            [(_locale_delim_re.split(item[0], 1)[0], item[1]) for item in self]
+        )
+        result = fallback.best_match(matches)
+
+        if result is not None:
+            return result
+
+        # Fall back to matching primary tags. If the client accepts
+        # "en", "en-US" is a valid match at this point.
+        fallback_matches = [_locale_delim_re.split(item, 1)[0] for item in matches]
+        result = super(LanguageAccept, self).best_match(fallback_matches)
+
+        # Return a value from the original match list. Find the first
+        # original value that starts with the matched primary tag.
+        if result is not None:
+            return next(item for item in matches if item.startswith(result))
+
+        return default
+
+
+class CharsetAccept(Accept):
+    """Like :class:`Accept` but with normalization for charsets."""
+
+    def _value_matches(self, value, item):
+        def _normalize(name):
+            try:
+                return codecs.lookup(name).name
+            except LookupError:
+                return name.lower()
+
+        return item == "*" or _normalize(value) == _normalize(item)
+
+
+def cache_property(key, empty, type):
+    """Return a new property object for a cache header.  Useful if you
+    want to add support for a cache extension in a subclass."""
+    return property(
+        lambda x: x._get_cache_value(key, empty, type),
+        lambda x, v: x._set_cache_value(key, v, type),
+        lambda x: x._del_cache_value(key),
+        "accessor for %r" % key,
+    )
+
+
+class _CacheControl(UpdateDictMixin, dict):
+    """Subclass of a dict that stores values for a Cache-Control header.  It
+    has accessors for all the cache-control directives specified in RFC 2616.
+    The class does not differentiate between request and response directives.
+
+    Because the cache-control directives in the HTTP header use dashes the
+    python descriptors use underscores for that.
+
+    To get a header of the :class:`CacheControl` object again you can convert
+    the object into a string or call the :meth:`to_header` method.  If you plan
+    to subclass it and add your own items have a look at the sourcecode for
+    that class.
+
+    .. versionchanged:: 0.4
+
+       Setting `no_cache` or `private` to boolean `True` will set the implicit
+       none-value which is ``*``:
+
+       >>> cc = ResponseCacheControl()
+       >>> cc.no_cache = True
+       >>> cc
+       <ResponseCacheControl 'no-cache'>
+       >>> cc.no_cache
+       '*'
+       >>> cc.no_cache = None
+       >>> cc
+       <ResponseCacheControl ''>
+
+       In versions before 0.5 the behavior documented here affected the now
+       no longer existing `CacheControl` class.
+    """
+
+    no_cache = cache_property("no-cache", "*", None)
+    no_store = cache_property("no-store", None, bool)
+    max_age = cache_property("max-age", -1, int)
+    no_transform = cache_property("no-transform", None, None)
+
+    def __init__(self, values=(), on_update=None):
+        dict.__init__(self, values or ())
+        self.on_update = on_update
+        self.provided = values is not None
+
+    def _get_cache_value(self, key, empty, type):
+        """Used internally by the accessor properties."""
+        if type is bool:
+            return key in self
+        if key in self:
+            value = self[key]
+            if value is None:
+                return empty
+            elif type is not None:
+                try:
+                    value = type(value)
+                except ValueError:
+                    pass
+            return value
+
+    def _set_cache_value(self, key, value, type):
+        """Used internally by the accessor properties."""
+        if type is bool:
+            if value:
+                self[key] = None
+            else:
+                self.pop(key, None)
+        else:
+            if value is None:
+                self.pop(key, None)
+            elif value is True:
+                self[key] = None
+            else:
+                self[key] = value
+
+    def _del_cache_value(self, key):
+        """Used internally by the accessor properties."""
+        if key in self:
+            del self[key]
+
+    def to_header(self):
+        """Convert the stored values into a cache control header."""
+        return dump_header(self)
+
+    def __str__(self):
+        return self.to_header()
+
+    def __repr__(self):
+        return "<%s %s>" % (
+            self.__class__.__name__,
+            " ".join("%s=%r" % (k, v) for k, v in sorted(self.items())),
+        )
+
+
+class RequestCacheControl(ImmutableDictMixin, _CacheControl):
+    """A cache control for requests.  This is immutable and gives access
+    to all the request-relevant cache control headers.
+
+    To get a header of the :class:`RequestCacheControl` object again you can
+    convert the object into a string or call the :meth:`to_header` method.  If
+    you plan to subclass it and add your own items have a look at the sourcecode
+    for that class.
+
+    .. versionadded:: 0.5
+       In previous versions a `CacheControl` class existed that was used
+       both for request and response.
+    """
+
+    max_stale = cache_property("max-stale", "*", int)
+    min_fresh = cache_property("min-fresh", "*", int)
+    only_if_cached = cache_property("only-if-cached", None, bool)
+
+
+class ResponseCacheControl(_CacheControl):
+    """A cache control for responses.  Unlike :class:`RequestCacheControl`
+    this is mutable and gives access to response-relevant cache control
+    headers.
+
+    To get a header of the :class:`ResponseCacheControl` object again you can
+    convert the object into a string or call the :meth:`to_header` method.  If
+    you plan to subclass it and add your own items have a look at the sourcecode
+    for that class.
+
+    .. versionadded:: 0.5
+       In previous versions a `CacheControl` class existed that was used
+       both for request and response.
+    """
+
+    public = cache_property("public", None, bool)
+    private = cache_property("private", "*", None)
+    must_revalidate = cache_property("must-revalidate", None, bool)
+    proxy_revalidate = cache_property("proxy-revalidate", None, bool)
+    s_maxage = cache_property("s-maxage", None, None)
+    immutable = cache_property("immutable", None, bool)
+
+
+# attach cache_property to the _CacheControl as staticmethod
+# so that others can reuse it.
+_CacheControl.cache_property = staticmethod(cache_property)
+
+
+def csp_property(key):
+    """Return a new property object for a content security policy header.
+    Useful if you want to add support for a csp extension in a
+    subclass.
+    """
+    return property(
+        lambda x: x._get_value(key),
+        lambda x, v: x._set_value(key, v),
+        lambda x: x._del_value(key),
+        "accessor for %r" % key,
+    )
+
+
+class ContentSecurityPolicy(UpdateDictMixin, dict):
+    """Subclass of a dict that stores values for a Content Security Policy
+    header. It has accessors for all the level 3 policies.
+
+    Because the csp directives in the HTTP header use dashes the
+    python descriptors use underscores for that.
+
+    To get a header of the :class:`ContentSecuirtyPolicy` object again
+    you can convert the object into a string or call the
+    :meth:`to_header` method.  If you plan to subclass it and add your
+    own items have a look at the sourcecode for that class.
+
+    .. versionadded:: 1.0.0
+       Support for Content Security Policy headers was added.
+
+    """
+
+    base_uri = csp_property("base-uri")
+    child_src = csp_property("child-src")
+    connect_src = csp_property("connect-src")
+    default_src = csp_property("default-src")
+    font_src = csp_property("font-src")
+    form_action = csp_property("form-action")
+    frame_ancestors = csp_property("frame-ancestors")
+    frame_src = csp_property("frame-src")
+    img_src = csp_property("img-src")
+    manifest_src = csp_property("manifest-src")
+    media_src = csp_property("media-src")
+    navigate_to = csp_property("navigate-to")
+    object_src = csp_property("object-src")
+    prefetch_src = csp_property("prefetch-src")
+    plugin_types = csp_property("plugin-types")
+    report_to = csp_property("report-to")
+    report_uri = csp_property("report-uri")
+    sandbox = csp_property("sandbox")
+    script_src = csp_property("script-src")
+    script_src_attr = csp_property("script-src-attr")
+    script_src_elem = csp_property("script-src-elem")
+    style_src = csp_property("style-src")
+    style_src_attr = csp_property("style-src-attr")
+    style_src_elem = csp_property("style-src-elem")
+    worker_src = csp_property("worker-src")
+
+    def __init__(self, values=(), on_update=None):
+        dict.__init__(self, values or ())
+        self.on_update = on_update
+        self.provided = values is not None
+
+    def _get_value(self, key):
+        """Used internally by the accessor properties."""
+        return self.get(key)
+
+    def _set_value(self, key, value):
+        """Used internally by the accessor properties."""
+        if value is None:
+            self.pop(key, None)
+        else:
+            self[key] = value
+
+    def _del_value(self, key):
+        """Used internally by the accessor properties."""
+        if key in self:
+            del self[key]
+
+    def to_header(self):
+        """Convert the stored values into a cache control header."""
+        return dump_csp_header(self)
+
+    def __str__(self):
+        return self.to_header()
+
+    def __repr__(self):
+        return "<%s %s>" % (
+            self.__class__.__name__,
+            " ".join("%s=%r" % (k, v) for k, v in sorted(self.items())),
+        )
+
+
+class CallbackDict(UpdateDictMixin, dict):
+    """A dict that calls a function passed every time something is changed.
+    The function is passed the dict instance.
+    """
+
+    def __init__(self, initial=None, on_update=None):
+        dict.__init__(self, initial or ())
+        self.on_update = on_update
+
+    def __repr__(self):
+        return "<%s %s>" % (self.__class__.__name__, dict.__repr__(self))
+
+
+class HeaderSet(collections_abc.MutableSet):
+    """Similar to the :class:`ETags` class this implements a set-like structure.
+    Unlike :class:`ETags` this is case insensitive and used for vary, allow, and
+    content-language headers.
+
+    If not constructed using the :func:`parse_set_header` function the
+    instantiation works like this:
+
+    >>> hs = HeaderSet(['foo', 'bar', 'baz'])
+    >>> hs
+    HeaderSet(['foo', 'bar', 'baz'])
+    """
+
+    def __init__(self, headers=None, on_update=None):
+        self._headers = list(headers or ())
+        self._set = set([x.lower() for x in self._headers])
+        self.on_update = on_update
+
+    def add(self, header):
+        """Add a new header to the set."""
+        self.update((header,))
+
+    def remove(self, header):
+        """Remove a header from the set.  This raises an :exc:`KeyError` if the
+        header is not in the set.
+
+        .. versionchanged:: 0.5
+            In older versions a :exc:`IndexError` was raised instead of a
+            :exc:`KeyError` if the object was missing.
+
+        :param header: the header to be removed.
+        """
+        key = header.lower()
+        if key not in self._set:
+            raise KeyError(header)
+        self._set.remove(key)
+        for idx, key in enumerate(self._headers):
+            if key.lower() == header:
+                del self._headers[idx]
+                break
+        if self.on_update is not None:
+            self.on_update(self)
+
+    def update(self, iterable):
+        """Add all the headers from the iterable to the set.
+
+        :param iterable: updates the set with the items from the iterable.
+        """
+        inserted_any = False
+        for header in iterable:
+            key = header.lower()
+            if key not in self._set:
+                self._headers.append(header)
+                self._set.add(key)
+                inserted_any = True
+        if inserted_any and self.on_update is not None:
+            self.on_update(self)
+
+    def discard(self, header):
+        """Like :meth:`remove` but ignores errors.
+
+        :param header: the header to be discarded.
+        """
+        try:
+            return self.remove(header)
+        except KeyError:
+            pass
+
+    def find(self, header):
+        """Return the index of the header in the set or return -1 if not found.
+
+        :param header: the header to be looked up.
+        """
+        header = header.lower()
+        for idx, item in enumerate(self._headers):
+            if item.lower() == header:
+                return idx
+        return -1
+
+    def index(self, header):
+        """Return the index of the header in the set or raise an
+        :exc:`IndexError`.
+
+        :param header: the header to be looked up.
+        """
+        rv = self.find(header)
+        if rv < 0:
+            raise IndexError(header)
+        return rv
+
+    def clear(self):
+        """Clear the set."""
+        self._set.clear()
+        del self._headers[:]
+        if self.on_update is not None:
+            self.on_update(self)
+
+    def as_set(self, preserve_casing=False):
+        """Return the set as real python set type.  When calling this, all
+        the items are converted to lowercase and the ordering is lost.
+
+        :param preserve_casing: if set to `True` the items in the set returned
+                                will have the original case like in the
+                                :class:`HeaderSet`, otherwise they will
+                                be lowercase.
+        """
+        if preserve_casing:
+            return set(self._headers)
+        return set(self._set)
+
+    def to_header(self):
+        """Convert the header set into an HTTP header string."""
+        return ", ".join(map(quote_header_value, self._headers))
+
+    def __getitem__(self, idx):
+        return self._headers[idx]
+
+    def __delitem__(self, idx):
+        rv = self._headers.pop(idx)
+        self._set.remove(rv.lower())
+        if self.on_update is not None:
+            self.on_update(self)
+
+    def __setitem__(self, idx, value):
+        old = self._headers[idx]
+        self._set.remove(old.lower())
+        self._headers[idx] = value
+        self._set.add(value.lower())
+        if self.on_update is not None:
+            self.on_update(self)
+
+    def __contains__(self, header):
+        return header.lower() in self._set
+
+    def __len__(self):
+        return len(self._set)
+
+    def __iter__(self):
+        return iter(self._headers)
+
+    def __nonzero__(self):
+        return bool(self._set)
+
+    def __str__(self):
+        return self.to_header()
+
+    def __repr__(self):
+        return "%s(%r)" % (self.__class__.__name__, self._headers)
+
+
+class ETags(collections_abc.Container, collections_abc.Iterable):
+    """A set that can be used to check if one etag is present in a collection
+    of etags.
+    """
+
+    def __init__(self, strong_etags=None, weak_etags=None, star_tag=False):
+        self._strong = frozenset(not star_tag and strong_etags or ())
+        self._weak = frozenset(weak_etags or ())
+        self.star_tag = star_tag
+
+    def as_set(self, include_weak=False):
+        """Convert the `ETags` object into a python set.  Per default all the
+        weak etags are not part of this set."""
+        rv = set(self._strong)
+        if include_weak:
+            rv.update(self._weak)
+        return rv
+
+    def is_weak(self, etag):
+        """Check if an etag is weak."""
+        return etag in self._weak
+
+    def is_strong(self, etag):
+        """Check if an etag is strong."""
+        return etag in self._strong
+
+    def contains_weak(self, etag):
+        """Check if an etag is part of the set including weak and strong tags."""
+        return self.is_weak(etag) or self.contains(etag)
+
+    def contains(self, etag):
+        """Check if an etag is part of the set ignoring weak tags.
+        It is also possible to use the ``in`` operator.
+        """
+        if self.star_tag:
+            return True
+        return self.is_strong(etag)
+
+    def contains_raw(self, etag):
+        """When passed a quoted tag it will check if this tag is part of the
+        set.  If the tag is weak it is checked against weak and strong tags,
+        otherwise strong only."""
+        etag, weak = unquote_etag(etag)
+        if weak:
+            return self.contains_weak(etag)
+        return self.contains(etag)
+
+    def to_header(self):
+        """Convert the etags set into a HTTP header string."""
+        if self.star_tag:
+            return "*"
+        return ", ".join(
+            ['"%s"' % x for x in self._strong] + ['W/"%s"' % x for x in self._weak]
+        )
+
+    def __call__(self, etag=None, data=None, include_weak=False):
+        if [etag, data].count(None) != 1:
+            raise TypeError("either tag or data required, but at least one")
+        if etag is None:
+            etag = generate_etag(data)
+        if include_weak:
+            if etag in self._weak:
+                return True
+        return etag in self._strong
+
+    def __bool__(self):
+        return bool(self.star_tag or self._strong or self._weak)
+
+    __nonzero__ = __bool__
+
+    def __str__(self):
+        return self.to_header()
+
+    def __iter__(self):
+        return iter(self._strong)
+
+    def __contains__(self, etag):
+        return self.contains(etag)
+
+    def __repr__(self):
+        return "<%s %r>" % (self.__class__.__name__, str(self))
+
+
+class IfRange(object):
+    """Very simple object that represents the `If-Range` header in parsed
+    form.  It will either have neither a etag or date or one of either but
+    never both.
+
+    .. versionadded:: 0.7
+    """
+
+    def __init__(self, etag=None, date=None):
+        #: The etag parsed and unquoted.  Ranges always operate on strong
+        #: etags so the weakness information is not necessary.
+        self.etag = etag
+        #: The date in parsed format or `None`.
+        self.date = date
+
+    def to_header(self):
+        """Converts the object back into an HTTP header."""
+        if self.date is not None:
+            return http_date(self.date)
+        if self.etag is not None:
+            return quote_etag(self.etag)
+        return ""
+
+    def __str__(self):
+        return self.to_header()
+
+    def __repr__(self):
+        return "<%s %r>" % (self.__class__.__name__, str(self))
+
+
+class Range(object):
+    """Represents a ``Range`` header. All methods only support only
+    bytes as the unit. Stores a list of ranges if given, but the methods
+    only work if only one range is provided.
+
+    :raise ValueError: If the ranges provided are invalid.
+
+    .. versionchanged:: 0.15
+        The ranges passed in are validated.
+
+    .. versionadded:: 0.7
+    """
+
+    def __init__(self, units, ranges):
+        #: The units of this range.  Usually "bytes".
+        self.units = units
+        #: A list of ``(begin, end)`` tuples for the range header provided.
+        #: The ranges are non-inclusive.
+        self.ranges = ranges
+
+        for start, end in ranges:
+            if start is None or (end is not None and (start < 0 or start >= end)):
+                raise ValueError("{} is not a valid range.".format((start, end)))
+
+    def range_for_length(self, length):
+        """If the range is for bytes, the length is not None and there is
+        exactly one range and it is satisfiable it returns a ``(start, stop)``
+        tuple, otherwise `None`.
+        """
+        if self.units != "bytes" or length is None or len(self.ranges) != 1:
+            return None
+        start, end = self.ranges[0]
+        if end is None:
+            end = length
+            if start < 0:
+                start += length
+        if is_byte_range_valid(start, end, length):
+            return start, min(end, length)
+
+    def make_content_range(self, length):
+        """Creates a :class:`~werkzeug.datastructures.ContentRange` object
+        from the current range and given content length.
+        """
+        rng = self.range_for_length(length)
+        if rng is not None:
+            return ContentRange(self.units, rng[0], rng[1], length)
+
+    def to_header(self):
+        """Converts the object back into an HTTP header."""
+        ranges = []
+        for begin, end in self.ranges:
+            if end is None:
+                ranges.append("%s-" % begin if begin >= 0 else str(begin))
+            else:
+                ranges.append("%s-%s" % (begin, end - 1))
+        return "%s=%s" % (self.units, ",".join(ranges))
+
+    def to_content_range_header(self, length):
+        """Converts the object into `Content-Range` HTTP header,
+        based on given length
+        """
+        range_for_length = self.range_for_length(length)
+        if range_for_length is not None:
+            return "%s %d-%d/%d" % (
+                self.units,
+                range_for_length[0],
+                range_for_length[1] - 1,
+                length,
+            )
+        return None
+
+    def __str__(self):
+        return self.to_header()
+
+    def __repr__(self):
+        return "<%s %r>" % (self.__class__.__name__, str(self))
+
+
+class ContentRange(object):
+    """Represents the content range header.
+
+    .. versionadded:: 0.7
+    """
+
+    def __init__(self, units, start, stop, length=None, on_update=None):
+        assert is_byte_range_valid(start, stop, length), "Bad range provided"
+        self.on_update = on_update
+        self.set(start, stop, length, units)
+
+    def _callback_property(name):  # noqa: B902
+        def fget(self):
+            return getattr(self, name)
+
+        def fset(self, value):
+            setattr(self, name, value)
+            if self.on_update is not None:
+                self.on_update(self)
+
+        return property(fget, fset)
+
+    #: The units to use, usually "bytes"
+    units = _callback_property("_units")
+    #: The start point of the range or `None`.
+    start = _callback_property("_start")
+    #: The stop point of the range (non-inclusive) or `None`.  Can only be
+    #: `None` if also start is `None`.
+    stop = _callback_property("_stop")
+    #: The length of the range or `None`.
+    length = _callback_property("_length")
+    del _callback_property
+
+    def set(self, start, stop, length=None, units="bytes"):
+        """Simple method to update the ranges."""
+        assert is_byte_range_valid(start, stop, length), "Bad range provided"
+        self._units = units
+        self._start = start
+        self._stop = stop
+        self._length = length
+        if self.on_update is not None:
+            self.on_update(self)
+
+    def unset(self):
+        """Sets the units to `None` which indicates that the header should
+        no longer be used.
+        """
+        self.set(None, None, units=None)
+
+    def to_header(self):
+        if self.units is None:
+            return ""
+        if self.length is None:
+            length = "*"
+        else:
+            length = self.length
+        if self.start is None:
+            return "%s */%s" % (self.units, length)
+        return "%s %s-%s/%s" % (self.units, self.start, self.stop - 1, length)
+
+    def __nonzero__(self):
+        return self.units is not None
+
+    __bool__ = __nonzero__
+
+    def __str__(self):
+        return self.to_header()
+
+    def __repr__(self):
+        return "<%s %r>" % (self.__class__.__name__, str(self))
+
+
+class Authorization(ImmutableDictMixin, dict):
+    """Represents an `Authorization` header sent by the client.  You should
+    not create this kind of object yourself but use it when it's returned by
+    the `parse_authorization_header` function.
+
+    This object is a dict subclass and can be altered by setting dict items
+    but it should be considered immutable as it's returned by the client and
+    not meant for modifications.
+
+    .. versionchanged:: 0.5
+       This object became immutable.
+    """
+
+    def __init__(self, auth_type, data=None):
+        dict.__init__(self, data or {})
+        self.type = auth_type
+
+    @property
+    def username(self):
+        """The username transmitted.  This is set for both basic and digest
+        auth all the time.
+        """
+        return self.get("username")
+
+    @property
+    def password(self):
+        """When the authentication type is basic this is the password
+        transmitted by the client, else `None`.
+        """
+        return self.get("password")
+
+    @property
+    def realm(self):
+        """This is the server realm sent back for HTTP digest auth."""
+        return self.get("realm")
+
+    @property
+    def nonce(self):
+        """The nonce the server sent for digest auth, sent back by the client.
+        A nonce should be unique for every 401 response for HTTP digest auth.
+        """
+        return self.get("nonce")
+
+    @property
+    def uri(self):
+        """The URI from Request-URI of the Request-Line; duplicated because
+        proxies are allowed to change the Request-Line in transit.  HTTP
+        digest auth only.
+        """
+        return self.get("uri")
+
+    @property
+    def nc(self):
+        """The nonce count value transmitted by clients if a qop-header is
+        also transmitted.  HTTP digest auth only.
+        """
+        return self.get("nc")
+
+    @property
+    def cnonce(self):
+        """If the server sent a qop-header in the ``WWW-Authenticate``
+        header, the client has to provide this value for HTTP digest auth.
+        See the RFC for more details.
+        """
+        return self.get("cnonce")
+
+    @property
+    def response(self):
+        """A string of 32 hex digits computed as defined in RFC 2617, which
+        proves that the user knows a password.  Digest auth only.
+        """
+        return self.get("response")
+
+    @property
+    def opaque(self):
+        """The opaque header from the server returned unchanged by the client.
+        It is recommended that this string be base64 or hexadecimal data.
+        Digest auth only.
+        """
+        return self.get("opaque")
+
+    @property
+    def qop(self):
+        """Indicates what "quality of protection" the client has applied to
+        the message for HTTP digest auth. Note that this is a single token,
+        not a quoted list of alternatives as in WWW-Authenticate.
+        """
+        return self.get("qop")
+
+
+class WWWAuthenticate(UpdateDictMixin, dict):
+    """Provides simple access to `WWW-Authenticate` headers."""
+
+    #: list of keys that require quoting in the generated header
+    _require_quoting = frozenset(["domain", "nonce", "opaque", "realm", "qop"])
+
+    def __init__(self, auth_type=None, values=None, on_update=None):
+        dict.__init__(self, values or ())
+        if auth_type:
+            self["__auth_type__"] = auth_type
+        self.on_update = on_update
+
+    def set_basic(self, realm="authentication required"):
+        """Clear the auth info and enable basic auth."""
+        dict.clear(self)
+        dict.update(self, {"__auth_type__": "basic", "realm": realm})
+        if self.on_update:
+            self.on_update(self)
+
+    def set_digest(
+        self, realm, nonce, qop=("auth",), opaque=None, algorithm=None, stale=False
+    ):
+        """Clear the auth info and enable digest auth."""
+        d = {
+            "__auth_type__": "digest",
+            "realm": realm,
+            "nonce": nonce,
+            "qop": dump_header(qop),
+        }
+        if stale:
+            d["stale"] = "TRUE"
+        if opaque is not None:
+            d["opaque"] = opaque
+        if algorithm is not None:
+            d["algorithm"] = algorithm
+        dict.clear(self)
+        dict.update(self, d)
+        if self.on_update:
+            self.on_update(self)
+
+    def to_header(self):
+        """Convert the stored values into a WWW-Authenticate header."""
+        d = dict(self)
+        auth_type = d.pop("__auth_type__", None) or "basic"
+        return "%s %s" % (
+            auth_type.title(),
+            ", ".join(
+                [
+                    "%s=%s"
+                    % (
+                        key,
+                        quote_header_value(
+                            value, allow_token=key not in self._require_quoting
+                        ),
+                    )
+                    for key, value in iteritems(d)
+                ]
+            ),
+        )
+
+    def __str__(self):
+        return self.to_header()
+
+    def __repr__(self):
+        return "<%s %r>" % (self.__class__.__name__, self.to_header())
+
+    def auth_property(name, doc=None):  # noqa: B902
+        """A static helper function for subclasses to add extra authentication
+        system properties onto a class::
+
+            class FooAuthenticate(WWWAuthenticate):
+                special_realm = auth_property('special_realm')
+
+        For more information have a look at the sourcecode to see how the
+        regular properties (:attr:`realm` etc.) are implemented.
+        """
+
+        def _set_value(self, value):
+            if value is None:
+                self.pop(name, None)
+            else:
+                self[name] = str(value)
+
+        return property(lambda x: x.get(name), _set_value, doc=doc)
+
+    def _set_property(name, doc=None):  # noqa: B902
+        def fget(self):
+            def on_update(header_set):
+                if not header_set and name in self:
+                    del self[name]
+                elif header_set:
+                    self[name] = header_set.to_header()
+
+            return parse_set_header(self.get(name), on_update)
+
+        return property(fget, doc=doc)
+
+    type = auth_property(
+        "__auth_type__",
+        doc="""The type of the auth mechanism. HTTP currently specifies
+        ``Basic`` and ``Digest``.""",
+    )
+    realm = auth_property(
+        "realm",
+        doc="""A string to be displayed to users so they know which
+        username and password to use. This string should contain at
+        least the name of the host performing the authentication and
+        might additionally indicate the collection of users who might
+        have access.""",
+    )
+    domain = _set_property(
+        "domain",
+        doc="""A list of URIs that define the protection space. If a URI
+        is an absolute path, it is relative to the canonical root URL of
+        the server being accessed.""",
+    )
+    nonce = auth_property(
+        "nonce",
+        doc="""
+        A server-specified data string which should be uniquely generated
+        each time a 401 response is made. It is recommended that this
+        string be base64 or hexadecimal data.""",
+    )
+    opaque = auth_property(
+        "opaque",
+        doc="""A string of data, specified by the server, which should
+        be returned by the client unchanged in the Authorization header
+        of subsequent requests with URIs in the same protection space.
+        It is recommended that this string be base64 or hexadecimal
+        data.""",
+    )
+    algorithm = auth_property(
+        "algorithm",
+        doc="""A string indicating a pair of algorithms used to produce
+        the digest and a checksum. If this is not present it is assumed
+        to be "MD5". If the algorithm is not understood, the challenge
+        should be ignored (and a different one used, if there is more
+        than one).""",
+    )
+    qop = _set_property(
+        "qop",
+        doc="""A set of quality-of-privacy directives such as auth and
+        auth-int.""",
+    )
+
+    @property
+    def stale(self):
+        """A flag, indicating that the previous request from the client
+        was rejected because the nonce value was stale.
+        """
+        val = self.get("stale")
+        if val is not None:
+            return val.lower() == "true"
+
+    @stale.setter
+    def stale(self, value):
+        if value is None:
+            self.pop("stale", None)
+        else:
+            self["stale"] = "TRUE" if value else "FALSE"
+
+    auth_property = staticmethod(auth_property)
+    del _set_property
+
+
+class FileStorage(object):
+    """The :class:`FileStorage` class is a thin wrapper over incoming files.
+    It is used by the request object to represent uploaded files.  All the
+    attributes of the wrapper stream are proxied by the file storage so
+    it's possible to do ``storage.read()`` instead of the long form
+    ``storage.stream.read()``.
+    """
+
+    def __init__(
+        self,
+        stream=None,
+        filename=None,
+        name=None,
+        content_type=None,
+        content_length=None,
+        headers=None,
+    ):
+        self.name = name
+        self.stream = stream or BytesIO()
+
+        # if no filename is provided we can attempt to get the filename
+        # from the stream object passed.  There we have to be careful to
+        # skip things like <fdopen>, <stderr> etc.  Python marks these
+        # special filenames with angular brackets.
+        if filename is None:
+            filename = getattr(stream, "name", None)
+            s = make_literal_wrapper(filename)
+            if filename and filename[0] == s("<") and filename[-1] == s(">"):
+                filename = None
+
+            # On Python 3 we want to make sure the filename is always unicode.
+            # This might not be if the name attribute is bytes due to the
+            # file being opened from the bytes API.
+            if not PY2 and isinstance(filename, bytes):
+                filename = filename.decode(get_filesystem_encoding(), "replace")
+
+        self.filename = filename
+        if headers is None:
+            headers = Headers()
+        self.headers = headers
+        if content_type is not None:
+            headers["Content-Type"] = content_type
+        if content_length is not None:
+            headers["Content-Length"] = str(content_length)
+
+    def _parse_content_type(self):
+        if not hasattr(self, "_parsed_content_type"):
+            self._parsed_content_type = parse_options_header(self.content_type)
+
+    @property
+    def content_type(self):
+        """The content-type sent in the header.  Usually not available"""
+        return self.headers.get("content-type")
+
+    @property
+    def content_length(self):
+        """The content-length sent in the header.  Usually not available"""
+        return int(self.headers.get("content-length") or 0)
+
+    @property
+    def mimetype(self):
+        """Like :attr:`content_type`, but without parameters (eg, without
+        charset, type etc.) and always lowercase.  For example if the content
+        type is ``text/HTML; charset=utf-8`` the mimetype would be
+        ``'text/html'``.
+
+        .. versionadded:: 0.7
+        """
+        self._parse_content_type()
+        return self._parsed_content_type[0].lower()
+
+    @property
+    def mimetype_params(self):
+        """The mimetype parameters as dict.  For example if the content
+        type is ``text/html; charset=utf-8`` the params would be
+        ``{'charset': 'utf-8'}``.
+
+        .. versionadded:: 0.7
+        """
+        self._parse_content_type()
+        return self._parsed_content_type[1]
+
+    def save(self, dst, buffer_size=16384):
+        """Save the file to a destination path or file object.  If the
+        destination is a file object you have to close it yourself after the
+        call.  The buffer size is the number of bytes held in memory during
+        the copy process.  It defaults to 16KB.
+
+        For secure file saving also have a look at :func:`secure_filename`.
+
+        :param dst: a filename, :class:`os.PathLike`, or open file
+            object to write to.
+        :param buffer_size: Passed as the ``length`` parameter of
+            :func:`shutil.copyfileobj`.
+
+        .. versionchanged:: 1.0
+            Supports :mod:`pathlib`.
+        """
+        from shutil import copyfileobj
+
+        close_dst = False
+
+        if hasattr(dst, "__fspath__"):
+            dst = fspath(dst)
+
+        if isinstance(dst, string_types):
+            dst = open(dst, "wb")
+            close_dst = True
+
+        try:
+            copyfileobj(self.stream, dst, buffer_size)
+        finally:
+            if close_dst:
+                dst.close()
+
+    def close(self):
+        """Close the underlying file if possible."""
+        try:
+            self.stream.close()
+        except Exception:
+            pass
+
+    def __nonzero__(self):
+        return bool(self.filename)
+
+    __bool__ = __nonzero__
+
+    def __getattr__(self, name):
+        try:
+            return getattr(self.stream, name)
+        except AttributeError:
+            # SpooledTemporaryFile doesn't implement IOBase, get the
+            # attribute from its backing file instead.
+            # https://github.com/python/cpython/pull/3249
+            if hasattr(self.stream, "_file"):
+                return getattr(self.stream._file, name)
+            raise
+
+    def __iter__(self):
+        return iter(self.stream)
+
+    def __repr__(self):
+        return "<%s: %r (%r)>" % (
+            self.__class__.__name__,
+            self.filename,
+            self.content_type,
+        )
+
+
+# circular dependencies
+from .http import dump_csp_header
+from .http import dump_header
+from .http import dump_options_header
+from .http import generate_etag
+from .http import http_date
+from .http import is_byte_range_valid
+from .http import parse_options_header
+from .http import parse_set_header
+from .http import quote_etag
+from .http import quote_header_value
+from .http import unquote_etag
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/__init__.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/__init__.py
new file mode 100644
index 0000000..f9f6e85
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/__init__.py
@@ -0,0 +1,498 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.debug
+    ~~~~~~~~~~~~~~
+
+    WSGI application traceback debugger.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import getpass
+import hashlib
+import json
+import mimetypes
+import os
+import pkgutil
+import re
+import sys
+import time
+import uuid
+from itertools import chain
+from os.path import basename
+from os.path import join
+
+from .._compat import text_type
+from .._internal import _log
+from ..http import parse_cookie
+from ..security import gen_salt
+from ..wrappers import BaseRequest as Request
+from ..wrappers import BaseResponse as Response
+from .console import Console
+from .tbtools import get_current_traceback
+from .tbtools import render_console_html
+
+# A week
+PIN_TIME = 60 * 60 * 24 * 7
+
+
+def hash_pin(pin):
+    if isinstance(pin, text_type):
+        pin = pin.encode("utf-8", "replace")
+    return hashlib.md5(pin + b"shittysalt").hexdigest()[:12]
+
+
+_machine_id = None
+
+
+def get_machine_id():
+    global _machine_id
+
+    if _machine_id is not None:
+        return _machine_id
+
+    def _generate():
+        linux = b""
+
+        # machine-id is stable across boots, boot_id is not.
+        for filename in "/etc/machine-id", "/proc/sys/kernel/random/boot_id":
+            try:
+                with open(filename, "rb") as f:
+                    value = f.readline().strip()
+            except IOError:
+                continue
+
+            if value:
+                linux += value
+                break
+
+        # Containers share the same machine id, add some cgroup
+        # information. This is used outside containers too but should be
+        # relatively stable across boots.
+        try:
+            with open("/proc/self/cgroup", "rb") as f:
+                linux += f.readline().strip().rpartition(b"/")[2]
+        except IOError:
+            pass
+
+        if linux:
+            return linux
+
+        # On OS X, use ioreg to get the computer's serial number.
+        try:
+            # subprocess may not be available, e.g. Google App Engine
+            # https://github.com/pallets/werkzeug/issues/925
+            from subprocess import Popen, PIPE
+
+            dump = Popen(
+                ["ioreg", "-c", "IOPlatformExpertDevice", "-d", "2"], stdout=PIPE
+            ).communicate()[0]
+            match = re.search(b'"serial-number" = <([^>]+)', dump)
+
+            if match is not None:
+                return match.group(1)
+        except (OSError, ImportError):
+            pass
+
+        # On Windows, use winreg to get the machine guid.
+        try:
+            import winreg as wr
+        except ImportError:
+            try:
+                import _winreg as wr
+            except ImportError:
+                wr = None
+
+        if wr is not None:
+            try:
+                with wr.OpenKey(
+                    wr.HKEY_LOCAL_MACHINE,
+                    "SOFTWARE\\Microsoft\\Cryptography",
+                    0,
+                    wr.KEY_READ | wr.KEY_WOW64_64KEY,
+                ) as rk:
+                    guid, guid_type = wr.QueryValueEx(rk, "MachineGuid")
+
+                    if guid_type == wr.REG_SZ:
+                        return guid.encode("utf-8")
+
+                    return guid
+            except WindowsError:
+                pass
+
+    _machine_id = _generate()
+    return _machine_id
+
+
+class _ConsoleFrame(object):
+    """Helper class so that we can reuse the frame console code for the
+    standalone console.
+    """
+
+    def __init__(self, namespace):
+        self.console = Console(namespace)
+        self.id = 0
+
+
+def get_pin_and_cookie_name(app):
+    """Given an application object this returns a semi-stable 9 digit pin
+    code and a random key.  The hope is that this is stable between
+    restarts to not make debugging particularly frustrating.  If the pin
+    was forcefully disabled this returns `None`.
+
+    Second item in the resulting tuple is the cookie name for remembering.
+    """
+    pin = os.environ.get("WERKZEUG_DEBUG_PIN")
+    rv = None
+    num = None
+
+    # Pin was explicitly disabled
+    if pin == "off":
+        return None, None
+
+    # Pin was provided explicitly
+    if pin is not None and pin.replace("-", "").isdigit():
+        # If there are separators in the pin, return it directly
+        if "-" in pin:
+            rv = pin
+        else:
+            num = pin
+
+    modname = getattr(app, "__module__", app.__class__.__module__)
+
+    try:
+        # getuser imports the pwd module, which does not exist in Google
+        # App Engine. It may also raise a KeyError if the UID does not
+        # have a username, such as in Docker.
+        username = getpass.getuser()
+    except (ImportError, KeyError):
+        username = None
+
+    mod = sys.modules.get(modname)
+
+    # This information only exists to make the cookie unique on the
+    # computer, not as a security feature.
+    probably_public_bits = [
+        username,
+        modname,
+        getattr(app, "__name__", app.__class__.__name__),
+        getattr(mod, "__file__", None),
+    ]
+
+    # This information is here to make it harder for an attacker to
+    # guess the cookie name.  They are unlikely to be contained anywhere
+    # within the unauthenticated debug page.
+    private_bits = [str(uuid.getnode()), get_machine_id()]
+
+    h = hashlib.md5()
+    for bit in chain(probably_public_bits, private_bits):
+        if not bit:
+            continue
+        if isinstance(bit, text_type):
+            bit = bit.encode("utf-8")
+        h.update(bit)
+    h.update(b"cookiesalt")
+
+    cookie_name = "__wzd" + h.hexdigest()[:20]
+
+    # If we need to generate a pin we salt it a bit more so that we don't
+    # end up with the same value and generate out 9 digits
+    if num is None:
+        h.update(b"pinsalt")
+        num = ("%09d" % int(h.hexdigest(), 16))[:9]
+
+    # Format the pincode in groups of digits for easier remembering if
+    # we don't have a result yet.
+    if rv is None:
+        for group_size in 5, 4, 3:
+            if len(num) % group_size == 0:
+                rv = "-".join(
+                    num[x : x + group_size].rjust(group_size, "0")
+                    for x in range(0, len(num), group_size)
+                )
+                break
+        else:
+            rv = num
+
+    return rv, cookie_name
+
+
+class DebuggedApplication(object):
+    """Enables debugging support for a given application::
+
+        from werkzeug.debug import DebuggedApplication
+        from myapp import app
+        app = DebuggedApplication(app, evalex=True)
+
+    The `evalex` keyword argument allows evaluating expressions in a
+    traceback's frame context.
+
+    :param app: the WSGI application to run debugged.
+    :param evalex: enable exception evaluation feature (interactive
+                   debugging).  This requires a non-forking server.
+    :param request_key: The key that points to the request object in ths
+                        environment.  This parameter is ignored in current
+                        versions.
+    :param console_path: the URL for a general purpose console.
+    :param console_init_func: the function that is executed before starting
+                              the general purpose console.  The return value
+                              is used as initial namespace.
+    :param show_hidden_frames: by default hidden traceback frames are skipped.
+                               You can show them by setting this parameter
+                               to `True`.
+    :param pin_security: can be used to disable the pin based security system.
+    :param pin_logging: enables the logging of the pin system.
+    """
+
+    def __init__(
+        self,
+        app,
+        evalex=False,
+        request_key="werkzeug.request",
+        console_path="/console",
+        console_init_func=None,
+        show_hidden_frames=False,
+        pin_security=True,
+        pin_logging=True,
+    ):
+        if not console_init_func:
+            console_init_func = None
+        self.app = app
+        self.evalex = evalex
+        self.frames = {}
+        self.tracebacks = {}
+        self.request_key = request_key
+        self.console_path = console_path
+        self.console_init_func = console_init_func
+        self.show_hidden_frames = show_hidden_frames
+        self.secret = gen_salt(20)
+        self._failed_pin_auth = 0
+
+        self.pin_logging = pin_logging
+        if pin_security:
+            # Print out the pin for the debugger on standard out.
+            if os.environ.get("WERKZEUG_RUN_MAIN") == "true" and pin_logging:
+                _log("warning", " * Debugger is active!")
+                if self.pin is None:
+                    _log("warning", " * Debugger PIN disabled. DEBUGGER UNSECURED!")
+                else:
+                    _log("info", " * Debugger PIN: %s" % self.pin)
+        else:
+            self.pin = None
+
+    @property
+    def pin(self):
+        if not hasattr(self, "_pin"):
+            self._pin, self._pin_cookie = get_pin_and_cookie_name(self.app)
+        return self._pin
+
+    @pin.setter
+    def pin(self, value):
+        self._pin = value
+
+    @property
+    def pin_cookie_name(self):
+        """The name of the pin cookie."""
+        if not hasattr(self, "_pin_cookie"):
+            self._pin, self._pin_cookie = get_pin_and_cookie_name(self.app)
+        return self._pin_cookie
+
+    def debug_application(self, environ, start_response):
+        """Run the application and conserve the traceback frames."""
+        app_iter = None
+        try:
+            app_iter = self.app(environ, start_response)
+            for item in app_iter:
+                yield item
+            if hasattr(app_iter, "close"):
+                app_iter.close()
+        except Exception:
+            if hasattr(app_iter, "close"):
+                app_iter.close()
+            traceback = get_current_traceback(
+                skip=1,
+                show_hidden_frames=self.show_hidden_frames,
+                ignore_system_exceptions=True,
+            )
+            for frame in traceback.frames:
+                self.frames[frame.id] = frame
+            self.tracebacks[traceback.id] = traceback
+
+            try:
+                start_response(
+                    "500 INTERNAL SERVER ERROR",
+                    [
+                        ("Content-Type", "text/html; charset=utf-8"),
+                        # Disable Chrome's XSS protection, the debug
+                        # output can cause false-positives.
+                        ("X-XSS-Protection", "0"),
+                    ],
+                )
+            except Exception:
+                # if we end up here there has been output but an error
+                # occurred.  in that situation we can do nothing fancy any
+                # more, better log something into the error log and fall
+                # back gracefully.
+                environ["wsgi.errors"].write(
+                    "Debugging middleware caught exception in streamed "
+                    "response at a point where response headers were already "
+                    "sent.\n"
+                )
+            else:
+                is_trusted = bool(self.check_pin_trust(environ))
+                yield traceback.render_full(
+                    evalex=self.evalex, evalex_trusted=is_trusted, secret=self.secret
+                ).encode("utf-8", "replace")
+
+            traceback.log(environ["wsgi.errors"])
+
+    def execute_command(self, request, command, frame):
+        """Execute a command in a console."""
+        return Response(frame.console.eval(command), mimetype="text/html")
+
+    def display_console(self, request):
+        """Display a standalone shell."""
+        if 0 not in self.frames:
+            if self.console_init_func is None:
+                ns = {}
+            else:
+                ns = dict(self.console_init_func())
+            ns.setdefault("app", self.app)
+            self.frames[0] = _ConsoleFrame(ns)
+        is_trusted = bool(self.check_pin_trust(request.environ))
+        return Response(
+            render_console_html(secret=self.secret, evalex_trusted=is_trusted),
+            mimetype="text/html",
+        )
+
+    def paste_traceback(self, request, traceback):
+        """Paste the traceback and return a JSON response."""
+        rv = traceback.paste()
+        return Response(json.dumps(rv), mimetype="application/json")
+
+    def get_resource(self, request, filename):
+        """Return a static resource from the shared folder."""
+        filename = join("shared", basename(filename))
+        try:
+            data = pkgutil.get_data(__package__, filename)
+        except OSError:
+            data = None
+        if data is not None:
+            mimetype = mimetypes.guess_type(filename)[0] or "application/octet-stream"
+            return Response(data, mimetype=mimetype)
+        return Response("Not Found", status=404)
+
+    def check_pin_trust(self, environ):
+        """Checks if the request passed the pin test.  This returns `True` if the
+        request is trusted on a pin/cookie basis and returns `False` if not.
+        Additionally if the cookie's stored pin hash is wrong it will return
+        `None` so that appropriate action can be taken.
+        """
+        if self.pin is None:
+            return True
+        val = parse_cookie(environ).get(self.pin_cookie_name)
+        if not val or "|" not in val:
+            return False
+        ts, pin_hash = val.split("|", 1)
+        if not ts.isdigit():
+            return False
+        if pin_hash != hash_pin(self.pin):
+            return None
+        return (time.time() - PIN_TIME) < int(ts)
+
+    def _fail_pin_auth(self):
+        time.sleep(5.0 if self._failed_pin_auth > 5 else 0.5)
+        self._failed_pin_auth += 1
+
+    def pin_auth(self, request):
+        """Authenticates with the pin."""
+        exhausted = False
+        auth = False
+        trust = self.check_pin_trust(request.environ)
+
+        # If the trust return value is `None` it means that the cookie is
+        # set but the stored pin hash value is bad.  This means that the
+        # pin was changed.  In this case we count a bad auth and unset the
+        # cookie.  This way it becomes harder to guess the cookie name
+        # instead of the pin as we still count up failures.
+        bad_cookie = False
+        if trust is None:
+            self._fail_pin_auth()
+            bad_cookie = True
+
+        # If we're trusted, we're authenticated.
+        elif trust:
+            auth = True
+
+        # If we failed too many times, then we're locked out.
+        elif self._failed_pin_auth > 10:
+            exhausted = True
+
+        # Otherwise go through pin based authentication
+        else:
+            entered_pin = request.args.get("pin")
+            if entered_pin.strip().replace("-", "") == self.pin.replace("-", ""):
+                self._failed_pin_auth = 0
+                auth = True
+            else:
+                self._fail_pin_auth()
+
+        rv = Response(
+            json.dumps({"auth": auth, "exhausted": exhausted}),
+            mimetype="application/json",
+        )
+        if auth:
+            rv.set_cookie(
+                self.pin_cookie_name,
+                "%s|%s" % (int(time.time()), hash_pin(self.pin)),
+                httponly=True,
+            )
+        elif bad_cookie:
+            rv.delete_cookie(self.pin_cookie_name)
+        return rv
+
+    def log_pin_request(self):
+        """Log the pin if needed."""
+        if self.pin_logging and self.pin is not None:
+            _log(
+                "info", " * To enable the debugger you need to enter the security pin:"
+            )
+            _log("info", " * Debugger pin code: %s" % self.pin)
+        return Response("")
+
+    def __call__(self, environ, start_response):
+        """Dispatch the requests."""
+        # important: don't ever access a function here that reads the incoming
+        # form data!  Otherwise the application won't have access to that data
+        # any more!
+        request = Request(environ)
+        response = self.debug_application
+        if request.args.get("__debugger__") == "yes":
+            cmd = request.args.get("cmd")
+            arg = request.args.get("f")
+            secret = request.args.get("s")
+            traceback = self.tracebacks.get(request.args.get("tb", type=int))
+            frame = self.frames.get(request.args.get("frm", type=int))
+            if cmd == "resource" and arg:
+                response = self.get_resource(request, arg)
+            elif cmd == "paste" and traceback is not None and secret == self.secret:
+                response = self.paste_traceback(request, traceback)
+            elif cmd == "pinauth" and secret == self.secret:
+                response = self.pin_auth(request)
+            elif cmd == "printpin" and secret == self.secret:
+                response = self.log_pin_request()
+            elif (
+                self.evalex
+                and cmd is not None
+                and frame is not None
+                and self.secret == secret
+                and self.check_pin_trust(environ)
+            ):
+                response = self.execute_command(request, cmd, frame)
+        elif (
+            self.evalex
+            and self.console_path is not None
+            and request.path == self.console_path
+        ):
+            response = self.display_console(request)
+        return response(environ, start_response)
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diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/console.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/console.py
new file mode 100644
index 0000000..f5e0868
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/console.py
@@ -0,0 +1,218 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.debug.console
+    ~~~~~~~~~~~~~~~~~~~~~~
+
+    Interactive console support.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import code
+import sys
+from types import CodeType
+
+from ..local import Local
+from ..utils import escape
+from .repr import debug_repr
+from .repr import dump
+from .repr import helper
+
+
+_local = Local()
+
+
+class HTMLStringO(object):
+    """A StringO version that HTML escapes on write."""
+
+    def __init__(self):
+        self._buffer = []
+
+    def isatty(self):
+        return False
+
+    def close(self):
+        pass
+
+    def flush(self):
+        pass
+
+    def seek(self, n, mode=0):
+        pass
+
+    def readline(self):
+        if len(self._buffer) == 0:
+            return ""
+        ret = self._buffer[0]
+        del self._buffer[0]
+        return ret
+
+    def reset(self):
+        val = "".join(self._buffer)
+        del self._buffer[:]
+        return val
+
+    def _write(self, x):
+        if isinstance(x, bytes):
+            x = x.decode("utf-8", "replace")
+        self._buffer.append(x)
+
+    def write(self, x):
+        self._write(escape(x))
+
+    def writelines(self, x):
+        self._write(escape("".join(x)))
+
+
+class ThreadedStream(object):
+    """Thread-local wrapper for sys.stdout for the interactive console."""
+
+    @staticmethod
+    def push():
+        if not isinstance(sys.stdout, ThreadedStream):
+            sys.stdout = ThreadedStream()
+        _local.stream = HTMLStringO()
+
+    @staticmethod
+    def fetch():
+        try:
+            stream = _local.stream
+        except AttributeError:
+            return ""
+        return stream.reset()
+
+    @staticmethod
+    def displayhook(obj):
+        try:
+            stream = _local.stream
+        except AttributeError:
+            return _displayhook(obj)
+        # stream._write bypasses escaping as debug_repr is
+        # already generating HTML for us.
+        if obj is not None:
+            _local._current_ipy.locals["_"] = obj
+            stream._write(debug_repr(obj))
+
+    def __setattr__(self, name, value):
+        raise AttributeError("read only attribute %s" % name)
+
+    def __dir__(self):
+        return dir(sys.__stdout__)
+
+    def __getattribute__(self, name):
+        if name == "__members__":
+            return dir(sys.__stdout__)
+        try:
+            stream = _local.stream
+        except AttributeError:
+            stream = sys.__stdout__
+        return getattr(stream, name)
+
+    def __repr__(self):
+        return repr(sys.__stdout__)
+
+
+# add the threaded stream as display hook
+_displayhook = sys.displayhook
+sys.displayhook = ThreadedStream.displayhook
+
+
+class _ConsoleLoader(object):
+    def __init__(self):
+        self._storage = {}
+
+    def register(self, code, source):
+        self._storage[id(code)] = source
+        # register code objects of wrapped functions too.
+        for var in code.co_consts:
+            if isinstance(var, CodeType):
+                self._storage[id(var)] = source
+
+    def get_source_by_code(self, code):
+        try:
+            return self._storage[id(code)]
+        except KeyError:
+            pass
+
+
+def _wrap_compiler(console):
+    compile = console.compile
+
+    def func(source, filename, symbol):
+        code = compile(source, filename, symbol)
+        console.loader.register(code, source)
+        return code
+
+    console.compile = func
+
+
+class _InteractiveConsole(code.InteractiveInterpreter):
+    def __init__(self, globals, locals):
+        _locals = dict(globals)
+        _locals.update(locals)
+        locals = _locals
+        locals["dump"] = dump
+        locals["help"] = helper
+        locals["__loader__"] = self.loader = _ConsoleLoader()
+        code.InteractiveInterpreter.__init__(self, locals)
+        self.more = False
+        self.buffer = []
+        _wrap_compiler(self)
+
+    def runsource(self, source):
+        source = source.rstrip() + "\n"
+        ThreadedStream.push()
+        prompt = "... " if self.more else ">>> "
+        try:
+            source_to_eval = "".join(self.buffer + [source])
+            if code.InteractiveInterpreter.runsource(
+                self, source_to_eval, "<debugger>", "single"
+            ):
+                self.more = True
+                self.buffer.append(source)
+            else:
+                self.more = False
+                del self.buffer[:]
+        finally:
+            output = ThreadedStream.fetch()
+        return prompt + escape(source) + output
+
+    def runcode(self, code):
+        try:
+            exec(code, self.locals)
+        except Exception:
+            self.showtraceback()
+
+    def showtraceback(self):
+        from .tbtools import get_current_traceback
+
+        tb = get_current_traceback(skip=1)
+        sys.stdout._write(tb.render_summary())
+
+    def showsyntaxerror(self, filename=None):
+        from .tbtools import get_current_traceback
+
+        tb = get_current_traceback(skip=4)
+        sys.stdout._write(tb.render_summary())
+
+    def write(self, data):
+        sys.stdout.write(data)
+
+
+class Console(object):
+    """An interactive console."""
+
+    def __init__(self, globals=None, locals=None):
+        if locals is None:
+            locals = {}
+        if globals is None:
+            globals = {}
+        self._ipy = _InteractiveConsole(globals, locals)
+
+    def eval(self, code):
+        _local._current_ipy = self._ipy
+        old_sys_stdout = sys.stdout
+        try:
+            return self._ipy.runsource(code)
+        finally:
+            sys.stdout = old_sys_stdout
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/repr.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/repr.py
new file mode 100644
index 0000000..d7a7285
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/repr.py
@@ -0,0 +1,297 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.debug.repr
+    ~~~~~~~~~~~~~~~~~~~
+
+    This module implements object representations for debugging purposes.
+    Unlike the default repr these reprs expose a lot more information and
+    produce HTML instead of ASCII.
+
+    Together with the CSS and JavaScript files of the debugger this gives
+    a colorful and more compact output.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import codecs
+import re
+import sys
+from collections import deque
+from traceback import format_exception_only
+
+from .._compat import integer_types
+from .._compat import iteritems
+from .._compat import PY2
+from .._compat import string_types
+from .._compat import text_type
+from ..utils import escape
+
+
+missing = object()
+_paragraph_re = re.compile(r"(?:\r\n|\r|\n){2,}")
+RegexType = type(_paragraph_re)
+
+
+HELP_HTML = """\
+<div class=box>
+  <h3>%(title)s</h3>
+  <pre class=help>%(text)s</pre>
+</div>\
+"""
+OBJECT_DUMP_HTML = """\
+<div class=box>
+  <h3>%(title)s</h3>
+  %(repr)s
+  <table>%(items)s</table>
+</div>\
+"""
+
+
+def debug_repr(obj):
+    """Creates a debug repr of an object as HTML unicode string."""
+    return DebugReprGenerator().repr(obj)
+
+
+def dump(obj=missing):
+    """Print the object details to stdout._write (for the interactive
+    console of the web debugger.
+    """
+    gen = DebugReprGenerator()
+    if obj is missing:
+        rv = gen.dump_locals(sys._getframe(1).f_locals)
+    else:
+        rv = gen.dump_object(obj)
+    sys.stdout._write(rv)
+
+
+class _Helper(object):
+    """Displays an HTML version of the normal help, for the interactive
+    debugger only because it requires a patched sys.stdout.
+    """
+
+    def __repr__(self):
+        return "Type help(object) for help about object."
+
+    def __call__(self, topic=None):
+        if topic is None:
+            sys.stdout._write("<span class=help>%s</span>" % repr(self))
+            return
+        import pydoc
+
+        pydoc.help(topic)
+        rv = sys.stdout.reset()
+        if isinstance(rv, bytes):
+            rv = rv.decode("utf-8", "ignore")
+        paragraphs = _paragraph_re.split(rv)
+        if len(paragraphs) > 1:
+            title = paragraphs[0]
+            text = "\n\n".join(paragraphs[1:])
+        else:  # pragma: no cover
+            title = "Help"
+            text = paragraphs[0]
+        sys.stdout._write(HELP_HTML % {"title": title, "text": text})
+
+
+helper = _Helper()
+
+
+def _add_subclass_info(inner, obj, base):
+    if isinstance(base, tuple):
+        for base in base:
+            if type(obj) is base:
+                return inner
+    elif type(obj) is base:
+        return inner
+    module = ""
+    if obj.__class__.__module__ not in ("__builtin__", "exceptions"):
+        module = '<span class="module">%s.</span>' % obj.__class__.__module__
+    return "%s%s(%s)" % (module, obj.__class__.__name__, inner)
+
+
+class DebugReprGenerator(object):
+    def __init__(self):
+        self._stack = []
+
+    def _sequence_repr_maker(left, right, base=object(), limit=8):  # noqa: B008, B902
+        def proxy(self, obj, recursive):
+            if recursive:
+                return _add_subclass_info(left + "..." + right, obj, base)
+            buf = [left]
+            have_extended_section = False
+            for idx, item in enumerate(obj):
+                if idx:
+                    buf.append(", ")
+                if idx == limit:
+                    buf.append('<span class="extended">')
+                    have_extended_section = True
+                buf.append(self.repr(item))
+            if have_extended_section:
+                buf.append("</span>")
+            buf.append(right)
+            return _add_subclass_info(u"".join(buf), obj, base)
+
+        return proxy
+
+    list_repr = _sequence_repr_maker("[", "]", list)
+    tuple_repr = _sequence_repr_maker("(", ")", tuple)
+    set_repr = _sequence_repr_maker("set([", "])", set)
+    frozenset_repr = _sequence_repr_maker("frozenset([", "])", frozenset)
+    deque_repr = _sequence_repr_maker(
+        '<span class="module">collections.' "</span>deque([", "])", deque
+    )
+    del _sequence_repr_maker
+
+    def regex_repr(self, obj):
+        pattern = repr(obj.pattern)
+        if PY2:
+            pattern = pattern.decode("string-escape", "ignore")
+        else:
+            pattern = codecs.decode(pattern, "unicode-escape", "ignore")
+        if pattern[:1] == "u":
+            pattern = "ur" + pattern[1:]
+        else:
+            pattern = "r" + pattern
+        return u're.compile(<span class="string regex">%s</span>)' % pattern
+
+    def string_repr(self, obj, limit=70):
+        buf = ['<span class="string">']
+        r = repr(obj)
+
+        # shorten the repr when the hidden part would be at least 3 chars
+        if len(r) - limit > 2:
+            buf.extend(
+                (
+                    escape(r[:limit]),
+                    '<span class="extended">',
+                    escape(r[limit:]),
+                    "</span>",
+                )
+            )
+        else:
+            buf.append(escape(r))
+
+        buf.append("</span>")
+        out = u"".join(buf)
+
+        # if the repr looks like a standard string, add subclass info if needed
+        if r[0] in "'\"" or (r[0] in "ub" and r[1] in "'\""):
+            return _add_subclass_info(out, obj, (bytes, text_type))
+
+        # otherwise, assume the repr distinguishes the subclass already
+        return out
+
+    def dict_repr(self, d, recursive, limit=5):
+        if recursive:
+            return _add_subclass_info(u"{...}", d, dict)
+        buf = ["{"]
+        have_extended_section = False
+        for idx, (key, value) in enumerate(iteritems(d)):
+            if idx:
+                buf.append(", ")
+            if idx == limit - 1:
+                buf.append('<span class="extended">')
+                have_extended_section = True
+            buf.append(
+                '<span class="pair"><span class="key">%s</span>: '
+                '<span class="value">%s</span></span>'
+                % (self.repr(key), self.repr(value))
+            )
+        if have_extended_section:
+            buf.append("</span>")
+        buf.append("}")
+        return _add_subclass_info(u"".join(buf), d, dict)
+
+    def object_repr(self, obj):
+        r = repr(obj)
+        if PY2:
+            r = r.decode("utf-8", "replace")
+        return u'<span class="object">%s</span>' % escape(r)
+
+    def dispatch_repr(self, obj, recursive):
+        if obj is helper:
+            return u'<span class="help">%r</span>' % helper
+        if isinstance(obj, (integer_types, float, complex)):
+            return u'<span class="number">%r</span>' % obj
+        if isinstance(obj, string_types) or isinstance(obj, bytes):
+            return self.string_repr(obj)
+        if isinstance(obj, RegexType):
+            return self.regex_repr(obj)
+        if isinstance(obj, list):
+            return self.list_repr(obj, recursive)
+        if isinstance(obj, tuple):
+            return self.tuple_repr(obj, recursive)
+        if isinstance(obj, set):
+            return self.set_repr(obj, recursive)
+        if isinstance(obj, frozenset):
+            return self.frozenset_repr(obj, recursive)
+        if isinstance(obj, dict):
+            return self.dict_repr(obj, recursive)
+        if deque is not None and isinstance(obj, deque):
+            return self.deque_repr(obj, recursive)
+        return self.object_repr(obj)
+
+    def fallback_repr(self):
+        try:
+            info = "".join(format_exception_only(*sys.exc_info()[:2]))
+        except Exception:  # pragma: no cover
+            info = "?"
+        if PY2:
+            info = info.decode("utf-8", "ignore")
+        return u'<span class="brokenrepr">&lt;broken repr (%s)&gt;' u"</span>" % escape(
+            info.strip()
+        )
+
+    def repr(self, obj):
+        recursive = False
+        for item in self._stack:
+            if item is obj:
+                recursive = True
+                break
+        self._stack.append(obj)
+        try:
+            try:
+                return self.dispatch_repr(obj, recursive)
+            except Exception:
+                return self.fallback_repr()
+        finally:
+            self._stack.pop()
+
+    def dump_object(self, obj):
+        repr = items = None
+        if isinstance(obj, dict):
+            title = "Contents of"
+            items = []
+            for key, value in iteritems(obj):
+                if not isinstance(key, string_types):
+                    items = None
+                    break
+                items.append((key, self.repr(value)))
+        if items is None:
+            items = []
+            repr = self.repr(obj)
+            for key in dir(obj):
+                try:
+                    items.append((key, self.repr(getattr(obj, key))))
+                except Exception:
+                    pass
+            title = "Details for"
+        title += " " + object.__repr__(obj)[1:-1]
+        return self.render_object_dump(items, title, repr)
+
+    def dump_locals(self, d):
+        items = [(key, self.repr(value)) for key, value in d.items()]
+        return self.render_object_dump(items, "Local variables in frame")
+
+    def render_object_dump(self, items, title, repr=None):
+        html_items = []
+        for key, value in items:
+            html_items.append(
+                "<tr><th>%s<td><pre class=repr>%s</pre>" % (escape(key), value)
+            )
+        if not html_items:
+            html_items.append("<tr><td><em>Nothing</em>")
+        return OBJECT_DUMP_HTML % {
+            "title": escape(title),
+            "repr": "<pre class=repr>%s</pre>" % repr if repr else "",
+            "items": "\n".join(html_items),
+        }
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/FONT_LICENSE b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/FONT_LICENSE
new file mode 100644
index 0000000..ae78a8f
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/FONT_LICENSE
@@ -0,0 +1,96 @@
+-------------------------------
+UBUNTU FONT LICENCE Version 1.0
+-------------------------------
+
+PREAMBLE
+This licence allows the licensed fonts to be used, studied, modified and
+redistributed freely. The fonts, including any derivative works, can be
+bundled, embedded, and redistributed provided the terms of this licence
+are met. The fonts and derivatives, however, cannot be released under
+any other licence. The requirement for fonts to remain under this
+licence does not require any document created using the fonts or their
+derivatives to be published under this licence, as long as the primary
+purpose of the document is not to be a vehicle for the distribution of
+the fonts.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this licence and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Original Version" refers to the collection of Font Software components
+as received under this licence.
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to
+a new environment.
+
+"Copyright Holder(s)" refers to all individuals and companies who have a
+copyright ownership of the Font Software.
+
+"Substantially Changed" refers to Modified Versions which can be easily
+identified as dissimilar to the Font Software by users of the Font
+Software comparing the Original Version with the Modified Version.
+
+To "Propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification and with or without charging
+a redistribution fee), making available to the public, and in some
+countries other activities as well.
+
+PERMISSION & CONDITIONS
+This licence does not grant any rights under trademark law and all such
+rights are reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of the Font Software, to propagate the Font Software, subject to
+the below conditions:
+
+1) Each copy of the Font Software must contain the above copyright
+notice and this licence. These can be included either as stand-alone
+text files, human-readable headers or in the appropriate machine-
+readable metadata fields within text or binary files as long as those
+fields can be easily viewed by the user.
+
+2) The font name complies with the following:
+(a) The Original Version must retain its name, unmodified.
+(b) Modified Versions which are Substantially Changed must be renamed to
+avoid use of the name of the Original Version or similar names entirely.
+(c) Modified Versions which are not Substantially Changed must be
+renamed to both (i) retain the name of the Original Version and (ii) add
+additional naming elements to distinguish the Modified Version from the
+Original Version. The name of such Modified Versions must be the name of
+the Original Version, with "derivative X" where X represents the name of
+the new work, appended to that name.
+
+3) The name(s) of the Copyright Holder(s) and any contributor to the
+Font Software shall not be used to promote, endorse or advertise any
+Modified Version, except (i) as required by this licence, (ii) to
+acknowledge the contribution(s) of the Copyright Holder(s) or (iii) with
+their explicit written permission.
+
+4) The Font Software, modified or unmodified, in part or in whole, must
+be distributed entirely under this licence, and must not be distributed
+under any other licence. The requirement for fonts to remain under this
+licence does not affect any document created using the Font Software,
+except any version of the Font Software extracted from a document
+created using the Font Software may only be distributed under this
+licence.
+
+TERMINATION
+This licence becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
+COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER
+DEALINGS IN THE FONT SOFTWARE.
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/console.png b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/console.png
new file mode 100644
index 0000000..c28dd63
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/console.png differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/debugger.js b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/debugger.js
new file mode 100644
index 0000000..ba267ed
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/debugger.js
@@ -0,0 +1,210 @@
+$(function() {
+  if (!EVALEX_TRUSTED) {
+    initPinBox();
+  }
+
+  /**
+   * if we are in console mode, show the console.
+   */
+  if (CONSOLE_MODE && EVALEX) {
+    openShell(null, $('div.console div.inner').empty(), 0);
+  }
+
+  $("div.detail").click(function() {
+    $("div.traceback").get(0).scrollIntoView(false);
+  });
+
+  $('div.traceback div.frame').each(function() {
+    var
+      target = $('pre', this),
+      consoleNode = null,
+      frameID = this.id.substring(6);
+
+    target.click(function() {
+      $(this).parent().toggleClass('expanded');
+    });
+
+    /**
+     * Add an interactive console to the frames
+     */
+    if (EVALEX && target.is('.current')) {
+      $('<img src="?__debugger__=yes&cmd=resource&f=console.png">')
+        .attr('title', 'Open an interactive python shell in this frame')
+        .click(function() {
+          consoleNode = openShell(consoleNode, target, frameID);
+          return false;
+        })
+        .prependTo(target);
+    }
+  });
+
+  /**
+   * toggle traceback types on click.
+   */
+  $('h2.traceback').click(function() {
+    $(this).next().slideToggle('fast');
+    $('div.plain').slideToggle('fast');
+  }).css('cursor', 'pointer');
+  $('div.plain').hide();
+
+  /**
+   * Add extra info (this is here so that only users with JavaScript
+   * enabled see it.)
+   */
+  $('span.nojavascript')
+    .removeClass('nojavascript')
+    .html('<p>To switch between the interactive traceback and the plaintext ' +
+          'one, you can click on the "Traceback" headline.  From the text ' +
+          'traceback you can also create a paste of it. ' + (!EVALEX ? '' :
+          'For code execution mouse-over the frame you want to debug and ' +
+          'click on the console icon on the right side.' +
+          '<p>You can execute arbitrary Python code in the stack frames and ' +
+          'there are some extra helpers available for introspection:' +
+          '<ul><li><code>dump()</code> shows all variables in the frame' +
+          '<li><code>dump(obj)</code> dumps all that\'s known about the object</ul>'));
+
+  /**
+   * Add the pastebin feature
+   */
+  $('div.plain form')
+    .submit(function() {
+      var label = $('input[type="submit"]', this);
+      var old_val = label.val();
+      label.val('submitting...');
+      $.ajax({
+        dataType:     'json',
+        url:          document.location.pathname,
+        data:         {__debugger__: 'yes', tb: TRACEBACK, cmd: 'paste',
+                       s: SECRET},
+        success:      function(data) {
+          $('div.plain span.pastemessage')
+            .removeClass('pastemessage')
+            .text('Paste created: ')
+            .append($('<a>#' + data.id + '</a>').attr('href', data.url));
+        },
+        error:        function() {
+          alert('Error: Could not submit paste.  No network connection?');
+          label.val(old_val);
+        }
+      });
+      return false;
+    });
+
+  // if we have javascript we submit by ajax anyways, so no need for the
+  // not scaling textarea.
+  var plainTraceback = $('div.plain textarea');
+  plainTraceback.replaceWith($('<pre>').text(plainTraceback.text()));
+});
+
+function initPinBox() {
+  $('.pin-prompt form').submit(function(evt) {
+    evt.preventDefault();
+    var pin = this.pin.value;
+    var btn = this.btn;
+    btn.disabled = true;
+    $.ajax({
+      dataType: 'json',
+      url: document.location.pathname,
+      data: {__debugger__: 'yes', cmd: 'pinauth', pin: pin,
+             s: SECRET},
+      success: function(data) {
+        btn.disabled = false;
+        if (data.auth) {
+          EVALEX_TRUSTED = true;
+          $('.pin-prompt').fadeOut();
+        } else {
+          if (data.exhausted) {
+            alert('Error: too many attempts.  Restart server to retry.');
+          } else {
+            alert('Error: incorrect pin');
+          }
+        }
+        console.log(data);
+      },
+      error: function() {
+        btn.disabled = false;
+        alert('Error: Could not verify PIN.  Network error?');
+      }
+    });
+  });
+}
+
+function promptForPin() {
+  if (!EVALEX_TRUSTED) {
+    $.ajax({
+      url: document.location.pathname,
+      data: {__debugger__: 'yes', cmd: 'printpin', s: SECRET}
+    });
+    $('.pin-prompt').fadeIn(function() {
+      $('.pin-prompt input[name="pin"]').focus();
+    });
+  }
+}
+
+
+/**
+ * Helper function for shell initialization
+ */
+function openShell(consoleNode, target, frameID) {
+  promptForPin();
+  if (consoleNode)
+    return consoleNode.slideToggle('fast');
+  consoleNode = $('<pre class="console">')
+    .appendTo(target.parent())
+    .hide()
+  var historyPos = 0, history = [''];
+  var output = $('<div class="output">[console ready]</div>')
+    .appendTo(consoleNode);
+  var form = $('<form>&gt;&gt;&gt; </form>')
+    .submit(function() {
+      var cmd = command.val();
+      $.get('', {
+          __debugger__: 'yes', cmd: cmd, frm: frameID, s: SECRET}, function(data) {
+        var tmp = $('<div>').html(data);
+        $('span.extended', tmp).each(function() {
+          var hidden = $(this).wrap('<span>').hide();
+          hidden
+            .parent()
+            .append($('<a href="#" class="toggle">&nbsp;&nbsp;</a>')
+              .click(function() {
+                hidden.toggle();
+                $(this).toggleClass('open')
+                return false;
+              }));
+        });
+        output.append(tmp);
+        command.focus();
+        consoleNode.scrollTop(consoleNode.get(0).scrollHeight);
+        var old = history.pop();
+        history.push(cmd);
+        if (typeof old != 'undefined')
+          history.push(old);
+        historyPos = history.length - 1;
+      });
+      command.val('');
+      return false;
+    }).
+    appendTo(consoleNode);
+
+  var command = $('<input type="text" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false">')
+    .appendTo(form)
+    .keydown(function(e) {
+      if (e.key == 'l' && e.ctrlKey) {
+        output.text('--- screen cleared ---');
+        return false;
+      }
+      else if (e.charCode == 0 && (e.keyCode == 38 || e.keyCode == 40)) {
+        //   handle up arrow and down arrow
+        if (e.keyCode == 38 && historyPos > 0)
+          historyPos--;
+        else if (e.keyCode == 40 && historyPos < history.length)
+          historyPos++;
+        command.val(history[historyPos]);
+        return false;
+      }
+    });
+
+  return consoleNode.slideDown('fast', function() {
+    command.focus();
+  });
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/jquery.js b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/jquery.js
new file mode 100644
index 0000000..a1c07fd
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/jquery.js
@@ -0,0 +1,2 @@
+/*! jQuery v3.4.1 | (c) JS Foundation and other contributors | jquery.org/license */
+!function(e,t){"use strict";"object"==typeof module&&"object"==typeof module.exports?module.exports=e.document?t(e,!0):function(e){if(!e.document)throw new Error("jQuery requires a window with a document");return t(e)}:t(e)}("undefined"!=typeof window?window:this,function(C,e){"use strict";var t=[],E=C.document,r=Object.getPrototypeOf,s=t.slice,g=t.concat,u=t.push,i=t.indexOf,n={},o=n.toString,v=n.hasOwnProperty,a=v.toString,l=a.call(Object),y={},m=function(e){return"function"==typeof e&&"number"!=typeof e.nodeType},x=function(e){return null!=e&&e===e.window},c={type:!0,src:!0,nonce:!0,noModule:!0};function b(e,t,n){var r,i,o=(n=n||E).createElement("script");if(o.text=e,t)for(r in c)(i=t[r]||t.getAttribute&&t.getAttribute(r))&&o.setAttribute(r,i);n.head.appendChild(o).parentNode.removeChild(o)}function w(e){return null==e?e+"":"object"==typeof e||"function"==typeof e?n[o.call(e)]||"object":typeof e}var f="3.4.1",k=function(e,t){return new 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diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/less.png b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/less.png
new file mode 100644
index 0000000..5efefd6
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/less.png differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/more.png b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/more.png
new file mode 100644
index 0000000..804fa22
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/more.png differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/source.png b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/source.png
new file mode 100644
index 0000000..f7ea904
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/source.png differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/style.css b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/style.css
new file mode 100644
index 0000000..107863e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/style.css
@@ -0,0 +1,154 @@
+@font-face {
+  font-family: 'Ubuntu';
+  font-style: normal;
+  font-weight: normal;
+  src: local('Ubuntu'), local('Ubuntu-Regular'),
+    url('?__debugger__=yes&cmd=resource&f=ubuntu.ttf') format('truetype');
+}
+
+body, input  { font-family: 'Lucida Grande', 'Lucida Sans Unicode', 'Geneva',
+               'Verdana', sans-serif; color: #000; text-align: center;
+               margin: 1em; padding: 0; font-size: 15px; }
+h1, h2, h3   { font-family: 'Ubuntu', 'Lucida Grande', 'Lucida Sans Unicode',
+               'Geneva', 'Verdana', sans-serif; font-weight: normal; }
+
+input        { background-color: #fff; margin: 0; text-align: left;
+               outline: none !important; }
+input[type="submit"] { padding: 3px 6px; }
+a            { color: #11557C; }
+a:hover      { color: #177199; }
+pre, code,
+textarea     { font-family: 'Consolas', 'Monaco', 'Bitstream Vera Sans Mono',
+               monospace; font-size: 14px; }
+
+div.debugger { text-align: left; padding: 12px; margin: auto;
+               background-color: white; }
+h1           { font-size: 36px; margin: 0 0 0.3em 0; }
+div.detail { cursor: pointer; }
+div.detail p { margin: 0 0 8px 13px; font-size: 14px; white-space: pre-wrap;
+               font-family: monospace; }
+div.explanation { margin: 20px 13px; font-size: 15px; color: #555; }
+div.footer   { font-size: 13px; text-align: right; margin: 30px 0;
+               color: #86989B; }
+
+h2           { font-size: 16px; margin: 1.3em 0 0.0 0; padding: 9px;
+               background-color: #11557C; color: white; }
+h2 em, h3 em { font-style: normal; color: #A5D6D9; font-weight: normal; }
+
+div.traceback, div.plain { border: 1px solid #ddd; margin: 0 0 1em 0; padding: 10px; }
+div.plain p      { margin: 0; }
+div.plain textarea,
+div.plain pre { margin: 10px 0 0 0; padding: 4px;
+                background-color: #E8EFF0; border: 1px solid #D3E7E9; }
+div.plain textarea { width: 99%; height: 300px; }
+div.traceback h3 { font-size: 1em; margin: 0 0 0.8em 0; }
+div.traceback ul { list-style: none; margin: 0; padding: 0 0 0 1em; }
+div.traceback h4 { font-size: 13px; font-weight: normal; margin: 0.7em 0 0.1em 0; }
+div.traceback pre { margin: 0; padding: 5px 0 3px 15px;
+                    background-color: #E8EFF0; border: 1px solid #D3E7E9; }
+div.traceback .library .current { background: white; color: #555; }
+div.traceback .expanded .current { background: #E8EFF0; color: black; }
+div.traceback pre:hover { background-color: #DDECEE; color: black; cursor: pointer; }
+div.traceback div.source.expanded pre + pre { border-top: none; }
+
+div.traceback span.ws { display: none; }
+div.traceback pre.before, div.traceback pre.after { display: none; background: white; }
+div.traceback div.source.expanded pre.before,
+div.traceback div.source.expanded pre.after {
+    display: block;
+}
+
+div.traceback div.source.expanded span.ws {
+    display: inline;
+}
+
+div.traceback blockquote { margin: 1em 0 0 0; padding: 0; white-space: pre-line; }
+div.traceback img { float: right; padding: 2px; margin: -3px 2px 0 0; display: none; }
+div.traceback img:hover { background-color: #ddd; cursor: pointer;
+                          border-color: #BFDDE0; }
+div.traceback pre:hover img { display: block; }
+div.traceback cite.filename { font-style: normal; color: #3B666B; }
+
+pre.console { border: 1px solid #ccc; background: white!important;
+              color: black; padding: 5px!important;
+              margin: 3px 0 0 0!important; cursor: default!important;
+              max-height: 400px; overflow: auto; }
+pre.console form { color: #555; }
+pre.console input { background-color: transparent; color: #555;
+                    width: 90%; font-family: 'Consolas', 'Deja Vu Sans Mono',
+                    'Bitstream Vera Sans Mono', monospace; font-size: 14px;
+                     border: none!important; }
+
+span.string { color: #30799B; }
+span.number { color: #9C1A1C; }
+span.help   { color: #3A7734; }
+span.object { color: #485F6E; }
+span.extended { opacity: 0.5; }
+span.extended:hover { opacity: 1; }
+a.toggle { text-decoration: none; background-repeat: no-repeat;
+           background-position: center center;
+           background-image: url(?__debugger__=yes&cmd=resource&f=more.png); }
+a.toggle:hover { background-color: #444; }
+a.open { background-image: url(?__debugger__=yes&cmd=resource&f=less.png); }
+
+pre.console div.traceback,
+pre.console div.box { margin: 5px 10px; white-space: normal;
+                      border: 1px solid #11557C; padding: 10px;
+                      font-family: 'Lucida Grande', 'Lucida Sans Unicode', 'Geneva',
+                      'Verdana', sans-serif;  }
+pre.console div.box h3,
+pre.console div.traceback h3 { margin: -10px -10px 10px -10px; padding: 5px;
+                               background: #11557C; color: white; }
+
+pre.console div.traceback pre:hover { cursor: default; background: #E8EFF0; }
+pre.console div.traceback pre.syntaxerror { background: inherit; border: none;
+                                            margin: 20px -10px -10px -10px;
+                                            padding: 10px; border-top: 1px solid #BFDDE0;
+                                            background: #E8EFF0; }
+pre.console div.noframe-traceback pre.syntaxerror { margin-top: -10px; border: none; }
+
+pre.console div.box pre.repr { padding: 0; margin: 0; background-color: white; border: none; }
+pre.console div.box table { margin-top: 6px; }
+pre.console div.box pre { border: none; }
+pre.console div.box pre.help { background-color: white; }
+pre.console div.box pre.help:hover { cursor: default; }
+pre.console table tr { vertical-align: top; }
+div.console { border: 1px solid #ccc; padding: 4px; background-color: #fafafa; }
+
+div.traceback pre, div.console pre {
+    white-space: pre-wrap;       /* css-3 should we be so lucky... */
+    white-space: -moz-pre-wrap;  /* Mozilla, since 1999 */
+    white-space: -pre-wrap;      /* Opera 4-6 ?? */
+    white-space: -o-pre-wrap;    /* Opera 7 ?? */
+    word-wrap: break-word;       /* Internet Explorer 5.5+ */
+    _white-space: pre;           /* IE only hack to re-specify in
+                                 addition to word-wrap  */
+}
+
+
+div.pin-prompt {
+    position: absolute;
+    display: none;
+    top: 0;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    background: rgba(255, 255, 255, 0.8);
+}
+
+div.pin-prompt .inner {
+    background: #eee;
+    padding: 10px 50px;
+    width: 350px;
+    margin: 10% auto 0 auto;
+    border: 1px solid #ccc;
+    border-radius: 2px;
+}
+
+div.exc-divider {
+    margin: 0.7em 0 0 -1em;
+    padding: 0.5em;
+    background: #11557C;
+    color: #ddd;
+    border: 1px solid #ddd;
+}
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/ubuntu.ttf b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/ubuntu.ttf
new file mode 100644
index 0000000..8079f93
Binary files /dev/null and b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/shared/ubuntu.ttf differ
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/tbtools.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/tbtools.py
new file mode 100644
index 0000000..b34403d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/debug/tbtools.py
@@ -0,0 +1,628 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.debug.tbtools
+    ~~~~~~~~~~~~~~~~~~~~~~
+
+    This module provides various traceback related utility functions.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import codecs
+import inspect
+import json
+import os
+import re
+import sys
+import sysconfig
+import traceback
+from tokenize import TokenError
+
+from .._compat import PY2
+from .._compat import range_type
+from .._compat import reraise
+from .._compat import string_types
+from .._compat import text_type
+from .._compat import to_native
+from .._compat import to_unicode
+from ..filesystem import get_filesystem_encoding
+from ..utils import cached_property
+from ..utils import escape
+from .console import Console
+
+
+_coding_re = re.compile(br"coding[:=]\s*([-\w.]+)")
+_line_re = re.compile(br"^(.*?)$", re.MULTILINE)
+_funcdef_re = re.compile(r"^(\s*def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)")
+UTF8_COOKIE = b"\xef\xbb\xbf"
+
+system_exceptions = (SystemExit, KeyboardInterrupt)
+try:
+    system_exceptions += (GeneratorExit,)
+except NameError:
+    pass
+
+
+HEADER = u"""\
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+  "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+  <head>
+    <title>%(title)s // Werkzeug Debugger</title>
+    <link rel="stylesheet" href="?__debugger__=yes&amp;cmd=resource&amp;f=style.css"
+        type="text/css">
+    <!-- We need to make sure this has a favicon so that the debugger does
+         not by accident trigger a request to /favicon.ico which might
+         change the application state. -->
+    <link rel="shortcut icon"
+        href="?__debugger__=yes&amp;cmd=resource&amp;f=console.png">
+    <script src="?__debugger__=yes&amp;cmd=resource&amp;f=jquery.js"></script>
+    <script src="?__debugger__=yes&amp;cmd=resource&amp;f=debugger.js"></script>
+    <script type="text/javascript">
+      var TRACEBACK = %(traceback_id)d,
+          CONSOLE_MODE = %(console)s,
+          EVALEX = %(evalex)s,
+          EVALEX_TRUSTED = %(evalex_trusted)s,
+          SECRET = "%(secret)s";
+    </script>
+  </head>
+  <body style="background-color: #fff">
+    <div class="debugger">
+"""
+FOOTER = u"""\
+      <div class="footer">
+        Brought to you by <strong class="arthur">DON'T PANIC</strong>, your
+        friendly Werkzeug powered traceback interpreter.
+      </div>
+    </div>
+
+    <div class="pin-prompt">
+      <div class="inner">
+        <h3>Console Locked</h3>
+        <p>
+          The console is locked and needs to be unlocked by entering the PIN.
+          You can find the PIN printed out on the standard output of your
+          shell that runs the server.
+        <form>
+          <p>PIN:
+            <input type=text name=pin size=14>
+            <input type=submit name=btn value="Confirm Pin">
+        </form>
+      </div>
+    </div>
+  </body>
+</html>
+"""
+
+PAGE_HTML = (
+    HEADER
+    + u"""\
+<h1>%(exception_type)s</h1>
+<div class="detail">
+  <p class="errormsg">%(exception)s</p>
+</div>
+<h2 class="traceback">Traceback <em>(most recent call last)</em></h2>
+%(summary)s
+<div class="plain">
+  <form action="/?__debugger__=yes&amp;cmd=paste" method="post">
+    <p>
+      <input type="hidden" name="language" value="pytb">
+      This is the Copy/Paste friendly version of the traceback.  <span
+      class="pastemessage">You can also paste this traceback into
+      a <a href="https://gist.github.com/">gist</a>:
+      <input type="submit" value="create paste"></span>
+    </p>
+    <textarea cols="50" rows="10" name="code" readonly>%(plaintext)s</textarea>
+  </form>
+</div>
+<div class="explanation">
+  The debugger caught an exception in your WSGI application.  You can now
+  look at the traceback which led to the error.  <span class="nojavascript">
+  If you enable JavaScript you can also use additional features such as code
+  execution (if the evalex feature is enabled), automatic pasting of the
+  exceptions and much more.</span>
+</div>
+"""
+    + FOOTER
+    + """
+<!--
+
+%(plaintext_cs)s
+
+-->
+"""
+)
+
+CONSOLE_HTML = (
+    HEADER
+    + u"""\
+<h1>Interactive Console</h1>
+<div class="explanation">
+In this console you can execute Python expressions in the context of the
+application.  The initial namespace was created by the debugger automatically.
+</div>
+<div class="console"><div class="inner">The Console requires JavaScript.</div></div>
+"""
+    + FOOTER
+)
+
+SUMMARY_HTML = u"""\
+<div class="%(classes)s">
+  %(title)s
+  <ul>%(frames)s</ul>
+  %(description)s
+</div>
+"""
+
+FRAME_HTML = u"""\
+<div class="frame" id="frame-%(id)d">
+  <h4>File <cite class="filename">"%(filename)s"</cite>,
+      line <em class="line">%(lineno)s</em>,
+      in <code class="function">%(function_name)s</code></h4>
+  <div class="source %(library)s">%(lines)s</div>
+</div>
+"""
+
+SOURCE_LINE_HTML = u"""\
+<tr class="%(classes)s">
+  <td class=lineno>%(lineno)s</td>
+  <td>%(code)s</td>
+</tr>
+"""
+
+
+def render_console_html(secret, evalex_trusted=True):
+    return CONSOLE_HTML % {
+        "evalex": "true",
+        "evalex_trusted": "true" if evalex_trusted else "false",
+        "console": "true",
+        "title": "Console",
+        "secret": secret,
+        "traceback_id": -1,
+    }
+
+
+def get_current_traceback(
+    ignore_system_exceptions=False, show_hidden_frames=False, skip=0
+):
+    """Get the current exception info as `Traceback` object.  Per default
+    calling this method will reraise system exceptions such as generator exit,
+    system exit or others.  This behavior can be disabled by passing `False`
+    to the function as first parameter.
+    """
+    exc_type, exc_value, tb = sys.exc_info()
+    if ignore_system_exceptions and exc_type in system_exceptions:
+        reraise(exc_type, exc_value, tb)
+    for _ in range_type(skip):
+        if tb.tb_next is None:
+            break
+        tb = tb.tb_next
+    tb = Traceback(exc_type, exc_value, tb)
+    if not show_hidden_frames:
+        tb.filter_hidden_frames()
+    return tb
+
+
+class Line(object):
+    """Helper for the source renderer."""
+
+    __slots__ = ("lineno", "code", "in_frame", "current")
+
+    def __init__(self, lineno, code):
+        self.lineno = lineno
+        self.code = code
+        self.in_frame = False
+        self.current = False
+
+    @property
+    def classes(self):
+        rv = ["line"]
+        if self.in_frame:
+            rv.append("in-frame")
+        if self.current:
+            rv.append("current")
+        return rv
+
+    def render(self):
+        return SOURCE_LINE_HTML % {
+            "classes": u" ".join(self.classes),
+            "lineno": self.lineno,
+            "code": escape(self.code),
+        }
+
+
+class Traceback(object):
+    """Wraps a traceback."""
+
+    def __init__(self, exc_type, exc_value, tb):
+        self.exc_type = exc_type
+        self.exc_value = exc_value
+        self.tb = tb
+
+        exception_type = exc_type.__name__
+        if exc_type.__module__ not in {"builtins", "__builtin__", "exceptions"}:
+            exception_type = exc_type.__module__ + "." + exception_type
+        self.exception_type = exception_type
+
+        self.groups = []
+        memo = set()
+        while True:
+            self.groups.append(Group(exc_type, exc_value, tb))
+            memo.add(id(exc_value))
+            if PY2:
+                break
+            exc_value = exc_value.__cause__ or exc_value.__context__
+            if exc_value is None or id(exc_value) in memo:
+                break
+            exc_type = type(exc_value)
+            tb = exc_value.__traceback__
+        self.groups.reverse()
+        self.frames = [frame for group in self.groups for frame in group.frames]
+
+    def filter_hidden_frames(self):
+        """Remove the frames according to the paste spec."""
+        for group in self.groups:
+            group.filter_hidden_frames()
+
+        self.frames[:] = [frame for group in self.groups for frame in group.frames]
+
+    @property
+    def is_syntax_error(self):
+        """Is it a syntax error?"""
+        return isinstance(self.exc_value, SyntaxError)
+
+    @property
+    def exception(self):
+        """String representation of the final exception."""
+        return self.groups[-1].exception
+
+    def log(self, logfile=None):
+        """Log the ASCII traceback into a file object."""
+        if logfile is None:
+            logfile = sys.stderr
+        tb = self.plaintext.rstrip() + u"\n"
+        logfile.write(to_native(tb, "utf-8", "replace"))
+
+    def paste(self):
+        """Create a paste and return the paste id."""
+        data = json.dumps(
+            {
+                "description": "Werkzeug Internal Server Error",
+                "public": False,
+                "files": {"traceback.txt": {"content": self.plaintext}},
+            }
+        ).encode("utf-8")
+        try:
+            from urllib2 import urlopen
+        except ImportError:
+            from urllib.request import urlopen
+        rv = urlopen("https://api.github.com/gists", data=data)
+        resp = json.loads(rv.read().decode("utf-8"))
+        rv.close()
+        return {"url": resp["html_url"], "id": resp["id"]}
+
+    def render_summary(self, include_title=True):
+        """Render the traceback for the interactive console."""
+        title = ""
+        classes = ["traceback"]
+        if not self.frames:
+            classes.append("noframe-traceback")
+            frames = []
+        else:
+            library_frames = sum(frame.is_library for frame in self.frames)
+            mark_lib = 0 < library_frames < len(self.frames)
+            frames = [group.render(mark_lib=mark_lib) for group in self.groups]
+
+        if include_title:
+            if self.is_syntax_error:
+                title = u"Syntax Error"
+            else:
+                title = u"Traceback <em>(most recent call last)</em>:"
+
+        if self.is_syntax_error:
+            description_wrapper = u"<pre class=syntaxerror>%s</pre>"
+        else:
+            description_wrapper = u"<blockquote>%s</blockquote>"
+
+        return SUMMARY_HTML % {
+            "classes": u" ".join(classes),
+            "title": u"<h3>%s</h3>" % title if title else u"",
+            "frames": u"\n".join(frames),
+            "description": description_wrapper % escape(self.exception),
+        }
+
+    def render_full(self, evalex=False, secret=None, evalex_trusted=True):
+        """Render the Full HTML page with the traceback info."""
+        exc = escape(self.exception)
+        return PAGE_HTML % {
+            "evalex": "true" if evalex else "false",
+            "evalex_trusted": "true" if evalex_trusted else "false",
+            "console": "false",
+            "title": exc,
+            "exception": exc,
+            "exception_type": escape(self.exception_type),
+            "summary": self.render_summary(include_title=False),
+            "plaintext": escape(self.plaintext),
+            "plaintext_cs": re.sub("-{2,}", "-", self.plaintext),
+            "traceback_id": self.id,
+            "secret": secret,
+        }
+
+    @cached_property
+    def plaintext(self):
+        return u"\n".join([group.render_text() for group in self.groups])
+
+    @property
+    def id(self):
+        return id(self)
+
+
+class Group(object):
+    """A group of frames for an exception in a traceback. On Python 3,
+    if the exception has a ``__cause__`` or ``__context__``, there are
+    multiple exception groups.
+    """
+
+    def __init__(self, exc_type, exc_value, tb):
+        self.exc_type = exc_type
+        self.exc_value = exc_value
+        self.info = None
+        if not PY2:
+            if exc_value.__cause__ is not None:
+                self.info = (
+                    u"The above exception was the direct cause of the"
+                    u" following exception"
+                )
+            elif exc_value.__context__ is not None:
+                self.info = (
+                    u"During handling of the above exception, another"
+                    u" exception occurred"
+                )
+
+        self.frames = []
+        while tb is not None:
+            self.frames.append(Frame(exc_type, exc_value, tb))
+            tb = tb.tb_next
+
+    def filter_hidden_frames(self):
+        new_frames = []
+        hidden = False
+
+        for frame in self.frames:
+            hide = frame.hide
+            if hide in ("before", "before_and_this"):
+                new_frames = []
+                hidden = False
+                if hide == "before_and_this":
+                    continue
+            elif hide in ("reset", "reset_and_this"):
+                hidden = False
+                if hide == "reset_and_this":
+                    continue
+            elif hide in ("after", "after_and_this"):
+                hidden = True
+                if hide == "after_and_this":
+                    continue
+            elif hide or hidden:
+                continue
+            new_frames.append(frame)
+
+        # if we only have one frame and that frame is from the codeop
+        # module, remove it.
+        if len(new_frames) == 1 and self.frames[0].module == "codeop":
+            del self.frames[:]
+
+        # if the last frame is missing something went terrible wrong :(
+        elif self.frames[-1] in new_frames:
+            self.frames[:] = new_frames
+
+    @property
+    def exception(self):
+        """String representation of the exception."""
+        buf = traceback.format_exception_only(self.exc_type, self.exc_value)
+        rv = "".join(buf).strip()
+        return to_unicode(rv, "utf-8", "replace")
+
+    def render(self, mark_lib=True):
+        out = []
+        if self.info is not None:
+            out.append(u'<li><div class="exc-divider">%s:</div>' % self.info)
+        for frame in self.frames:
+            out.append(
+                u"<li%s>%s"
+                % (
+                    u' title="%s"' % escape(frame.info) if frame.info else u"",
+                    frame.render(mark_lib=mark_lib),
+                )
+            )
+        return u"\n".join(out)
+
+    def render_text(self):
+        out = []
+        if self.info is not None:
+            out.append(u"\n%s:\n" % self.info)
+        out.append(u"Traceback (most recent call last):")
+        for frame in self.frames:
+            out.append(frame.render_text())
+        out.append(self.exception)
+        return u"\n".join(out)
+
+
+class Frame(object):
+    """A single frame in a traceback."""
+
+    def __init__(self, exc_type, exc_value, tb):
+        self.lineno = tb.tb_lineno
+        self.function_name = tb.tb_frame.f_code.co_name
+        self.locals = tb.tb_frame.f_locals
+        self.globals = tb.tb_frame.f_globals
+
+        fn = inspect.getsourcefile(tb) or inspect.getfile(tb)
+        if fn[-4:] in (".pyo", ".pyc"):
+            fn = fn[:-1]
+        # if it's a file on the file system resolve the real filename.
+        if os.path.isfile(fn):
+            fn = os.path.realpath(fn)
+        self.filename = to_unicode(fn, get_filesystem_encoding())
+        self.module = self.globals.get("__name__", self.locals.get("__name__"))
+        self.loader = self.globals.get("__loader__", self.locals.get("__loader__"))
+        self.code = tb.tb_frame.f_code
+
+        # support for paste's traceback extensions
+        self.hide = self.locals.get("__traceback_hide__", False)
+        info = self.locals.get("__traceback_info__")
+        if info is not None:
+            info = to_unicode(info, "utf-8", "replace")
+        self.info = info
+
+    def render(self, mark_lib=True):
+        """Render a single frame in a traceback."""
+        return FRAME_HTML % {
+            "id": self.id,
+            "filename": escape(self.filename),
+            "lineno": self.lineno,
+            "function_name": escape(self.function_name),
+            "lines": self.render_line_context(),
+            "library": "library" if mark_lib and self.is_library else "",
+        }
+
+    @cached_property
+    def is_library(self):
+        return any(
+            self.filename.startswith(path) for path in sysconfig.get_paths().values()
+        )
+
+    def render_text(self):
+        return u'  File "%s", line %s, in %s\n    %s' % (
+            self.filename,
+            self.lineno,
+            self.function_name,
+            self.current_line.strip(),
+        )
+
+    def render_line_context(self):
+        before, current, after = self.get_context_lines()
+        rv = []
+
+        def render_line(line, cls):
+            line = line.expandtabs().rstrip()
+            stripped_line = line.strip()
+            prefix = len(line) - len(stripped_line)
+            rv.append(
+                '<pre class="line %s"><span class="ws">%s</span>%s</pre>'
+                % (cls, " " * prefix, escape(stripped_line) or " ")
+            )
+
+        for line in before:
+            render_line(line, "before")
+        render_line(current, "current")
+        for line in after:
+            render_line(line, "after")
+
+        return "\n".join(rv)
+
+    def get_annotated_lines(self):
+        """Helper function that returns lines with extra information."""
+        lines = [Line(idx + 1, x) for idx, x in enumerate(self.sourcelines)]
+
+        # find function definition and mark lines
+        if hasattr(self.code, "co_firstlineno"):
+            lineno = self.code.co_firstlineno - 1
+            while lineno > 0:
+                if _funcdef_re.match(lines[lineno].code):
+                    break
+                lineno -= 1
+            try:
+                offset = len(inspect.getblock([x.code + "\n" for x in lines[lineno:]]))
+            except TokenError:
+                offset = 0
+            for line in lines[lineno : lineno + offset]:
+                line.in_frame = True
+
+        # mark current line
+        try:
+            lines[self.lineno - 1].current = True
+        except IndexError:
+            pass
+
+        return lines
+
+    def eval(self, code, mode="single"):
+        """Evaluate code in the context of the frame."""
+        if isinstance(code, string_types):
+            if PY2 and isinstance(code, text_type):  # noqa
+                code = UTF8_COOKIE + code.encode("utf-8")
+            code = compile(code, "<interactive>", mode)
+        return eval(code, self.globals, self.locals)
+
+    @cached_property
+    def sourcelines(self):
+        """The sourcecode of the file as list of unicode strings."""
+        # get sourcecode from loader or file
+        source = None
+        if self.loader is not None:
+            try:
+                if hasattr(self.loader, "get_source"):
+                    source = self.loader.get_source(self.module)
+                elif hasattr(self.loader, "get_source_by_code"):
+                    source = self.loader.get_source_by_code(self.code)
+            except Exception:
+                # we munch the exception so that we don't cause troubles
+                # if the loader is broken.
+                pass
+
+        if source is None:
+            try:
+                with open(
+                    to_native(self.filename, get_filesystem_encoding()), mode="rb"
+                ) as f:
+                    source = f.read()
+            except IOError:
+                return []
+
+        # already unicode?  return right away
+        if isinstance(source, text_type):
+            return source.splitlines()
+
+        # yes. it should be ascii, but we don't want to reject too many
+        # characters in the debugger if something breaks
+        charset = "utf-8"
+        if source.startswith(UTF8_COOKIE):
+            source = source[3:]
+        else:
+            for idx, match in enumerate(_line_re.finditer(source)):
+                match = _coding_re.search(match.group())
+                if match is not None:
+                    charset = match.group(1)
+                    break
+                if idx > 1:
+                    break
+
+        # on broken cookies we fall back to utf-8 too
+        charset = to_native(charset)
+        try:
+            codecs.lookup(charset)
+        except LookupError:
+            charset = "utf-8"
+
+        return source.decode(charset, "replace").splitlines()
+
+    def get_context_lines(self, context=5):
+        before = self.sourcelines[self.lineno - context - 1 : self.lineno - 1]
+        past = self.sourcelines[self.lineno : self.lineno + context]
+        return (before, self.current_line, past)
+
+    @property
+    def current_line(self):
+        try:
+            return self.sourcelines[self.lineno - 1]
+        except IndexError:
+            return u""
+
+    @cached_property
+    def console(self):
+        return Console(self.globals, self.locals)
+
+    @property
+    def id(self):
+        return id(self)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/exceptions.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/exceptions.py
new file mode 100644
index 0000000..82e99c2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/exceptions.py
@@ -0,0 +1,829 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.exceptions
+    ~~~~~~~~~~~~~~~~~~~
+
+    This module implements a number of Python exceptions you can raise from
+    within your views to trigger a standard non-200 response.
+
+
+    Usage Example
+    -------------
+
+    ::
+
+        from werkzeug.wrappers import BaseRequest
+        from werkzeug.wsgi import responder
+        from werkzeug.exceptions import HTTPException, NotFound
+
+        def view(request):
+            raise NotFound()
+
+        @responder
+        def application(environ, start_response):
+            request = BaseRequest(environ)
+            try:
+                return view(request)
+            except HTTPException as e:
+                return e
+
+
+    As you can see from this example those exceptions are callable WSGI
+    applications.  Because of Python 2.4 compatibility those do not extend
+    from the response objects but only from the python exception class.
+
+    As a matter of fact they are not Werkzeug response objects.  However you
+    can get a response object by calling ``get_response()`` on a HTTP
+    exception.
+
+    Keep in mind that you have to pass an environment to ``get_response()``
+    because some errors fetch additional information from the WSGI
+    environment.
+
+    If you want to hook in a different exception page to say, a 404 status
+    code, you can add a second except for a specific subclass of an error::
+
+        @responder
+        def application(environ, start_response):
+            request = BaseRequest(environ)
+            try:
+                return view(request)
+            except NotFound, e:
+                return not_found(request)
+            except HTTPException, e:
+                return e
+
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import sys
+from datetime import datetime
+
+from ._compat import implements_to_string
+from ._compat import integer_types
+from ._compat import iteritems
+from ._compat import text_type
+from ._internal import _get_environ
+from .utils import escape
+
+
+@implements_to_string
+class HTTPException(Exception):
+    """Baseclass for all HTTP exceptions.  This exception can be called as WSGI
+    application to render a default error page or you can catch the subclasses
+    of it independently and render nicer error messages.
+    """
+
+    code = None
+    description = None
+
+    def __init__(self, description=None, response=None):
+        super(HTTPException, self).__init__()
+        if description is not None:
+            self.description = description
+        self.response = response
+
+    @classmethod
+    def wrap(cls, exception, name=None):
+        """Create an exception that is a subclass of the calling HTTP
+        exception and the ``exception`` argument.
+
+        The first argument to the class will be passed to the
+        wrapped ``exception``, the rest to the HTTP exception. If
+        ``e.args`` is not empty and ``e.show_exception`` is ``True``,
+        the wrapped exception message is added to the HTTP error
+        description.
+
+        .. versionchanged:: 0.15.5
+            The ``show_exception`` attribute controls whether the
+            description includes the wrapped exception message.
+
+        .. versionchanged:: 0.15.0
+            The description includes the wrapped exception message.
+        """
+
+        class newcls(cls, exception):
+            _description = cls.description
+            show_exception = False
+
+            def __init__(self, arg=None, *args, **kwargs):
+                super(cls, self).__init__(*args, **kwargs)
+
+                if arg is None:
+                    exception.__init__(self)
+                else:
+                    exception.__init__(self, arg)
+
+            @property
+            def description(self):
+                if self.show_exception:
+                    return "{}\n{}: {}".format(
+                        self._description, exception.__name__, exception.__str__(self)
+                    )
+
+                return self._description
+
+            @description.setter
+            def description(self, value):
+                self._description = value
+
+        newcls.__module__ = sys._getframe(1).f_globals.get("__name__")
+        name = name or cls.__name__ + exception.__name__
+        newcls.__name__ = newcls.__qualname__ = name
+        return newcls
+
+    @property
+    def name(self):
+        """The status name."""
+        from .http import HTTP_STATUS_CODES
+
+        return HTTP_STATUS_CODES.get(self.code, "Unknown Error")
+
+    def get_description(self, environ=None):
+        """Get the description."""
+        return u"<p>%s</p>" % escape(self.description).replace("\n", "<br>")
+
+    def get_body(self, environ=None):
+        """Get the HTML body."""
+        return text_type(
+            (
+                u'<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">\n'
+                u"<title>%(code)s %(name)s</title>\n"
+                u"<h1>%(name)s</h1>\n"
+                u"%(description)s\n"
+            )
+            % {
+                "code": self.code,
+                "name": escape(self.name),
+                "description": self.get_description(environ),
+            }
+        )
+
+    def get_headers(self, environ=None):
+        """Get a list of headers."""
+        return [("Content-Type", "text/html; charset=utf-8")]
+
+    def get_response(self, environ=None):
+        """Get a response object.  If one was passed to the exception
+        it's returned directly.
+
+        :param environ: the optional environ for the request.  This
+                        can be used to modify the response depending
+                        on how the request looked like.
+        :return: a :class:`Response` object or a subclass thereof.
+        """
+        from .wrappers.response import Response
+
+        if self.response is not None:
+            return self.response
+        if environ is not None:
+            environ = _get_environ(environ)
+        headers = self.get_headers(environ)
+        return Response(self.get_body(environ), self.code, headers)
+
+    def __call__(self, environ, start_response):
+        """Call the exception as WSGI application.
+
+        :param environ: the WSGI environment.
+        :param start_response: the response callable provided by the WSGI
+                               server.
+        """
+        response = self.get_response(environ)
+        return response(environ, start_response)
+
+    def __str__(self):
+        code = self.code if self.code is not None else "???"
+        return "%s %s: %s" % (code, self.name, self.description)
+
+    def __repr__(self):
+        code = self.code if self.code is not None else "???"
+        return "<%s '%s: %s'>" % (self.__class__.__name__, code, self.name)
+
+
+class BadRequest(HTTPException):
+    """*400* `Bad Request`
+
+    Raise if the browser sends something to the application the application
+    or server cannot handle.
+    """
+
+    code = 400
+    description = (
+        "The browser (or proxy) sent a request that this server could "
+        "not understand."
+    )
+
+
+class ClientDisconnected(BadRequest):
+    """Internal exception that is raised if Werkzeug detects a disconnected
+    client.  Since the client is already gone at that point attempting to
+    send the error message to the client might not work and might ultimately
+    result in another exception in the server.  Mainly this is here so that
+    it is silenced by default as far as Werkzeug is concerned.
+
+    Since disconnections cannot be reliably detected and are unspecified
+    by WSGI to a large extent this might or might not be raised if a client
+    is gone.
+
+    .. versionadded:: 0.8
+    """
+
+
+class SecurityError(BadRequest):
+    """Raised if something triggers a security error.  This is otherwise
+    exactly like a bad request error.
+
+    .. versionadded:: 0.9
+    """
+
+
+class BadHost(BadRequest):
+    """Raised if the submitted host is badly formatted.
+
+    .. versionadded:: 0.11.2
+    """
+
+
+class Unauthorized(HTTPException):
+    """*401* ``Unauthorized``
+
+    Raise if the user is not authorized to access a resource.
+
+    The ``www_authenticate`` argument should be used to set the
+    ``WWW-Authenticate`` header. This is used for HTTP basic auth and
+    other schemes. Use :class:`~werkzeug.datastructures.WWWAuthenticate`
+    to create correctly formatted values. Strictly speaking a 401
+    response is invalid if it doesn't provide at least one value for
+    this header, although real clients typically don't care.
+
+    :param description: Override the default message used for the body
+        of the response.
+    :param www-authenticate: A single value, or list of values, for the
+        WWW-Authenticate header.
+
+    .. versionchanged:: 0.15.3
+        If the ``www_authenticate`` argument is not set, the
+        ``WWW-Authenticate`` header is not set.
+
+    .. versionchanged:: 0.15.3
+        The ``response`` argument was restored.
+
+    .. versionchanged:: 0.15.1
+        ``description`` was moved back as the first argument, restoring
+         its previous position.
+
+    .. versionchanged:: 0.15.0
+        ``www_authenticate`` was added as the first argument, ahead of
+        ``description``.
+    """
+
+    code = 401
+    description = (
+        "The server could not verify that you are authorized to access"
+        " the URL requested. You either supplied the wrong credentials"
+        " (e.g. a bad password), or your browser doesn't understand"
+        " how to supply the credentials required."
+    )
+
+    def __init__(self, description=None, response=None, www_authenticate=None):
+        HTTPException.__init__(self, description, response)
+
+        if www_authenticate is not None:
+            if not isinstance(www_authenticate, (tuple, list)):
+                www_authenticate = (www_authenticate,)
+
+        self.www_authenticate = www_authenticate
+
+    def get_headers(self, environ=None):
+        headers = HTTPException.get_headers(self, environ)
+        if self.www_authenticate:
+            headers.append(
+                ("WWW-Authenticate", ", ".join([str(x) for x in self.www_authenticate]))
+            )
+        return headers
+
+
+class Forbidden(HTTPException):
+    """*403* `Forbidden`
+
+    Raise if the user doesn't have the permission for the requested resource
+    but was authenticated.
+    """
+
+    code = 403
+    description = (
+        "You don't have the permission to access the requested"
+        " resource. It is either read-protected or not readable by the"
+        " server."
+    )
+
+
+class NotFound(HTTPException):
+    """*404* `Not Found`
+
+    Raise if a resource does not exist and never existed.
+    """
+
+    code = 404
+    description = (
+        "The requested URL was not found on the server. If you entered"
+        " the URL manually please check your spelling and try again."
+    )
+
+
+class MethodNotAllowed(HTTPException):
+    """*405* `Method Not Allowed`
+
+    Raise if the server used a method the resource does not handle.  For
+    example `POST` if the resource is view only.  Especially useful for REST.
+
+    The first argument for this exception should be a list of allowed methods.
+    Strictly speaking the response would be invalid if you don't provide valid
+    methods in the header which you can do with that list.
+    """
+
+    code = 405
+    description = "The method is not allowed for the requested URL."
+
+    def __init__(self, valid_methods=None, description=None):
+        """Takes an optional list of valid http methods
+        starting with werkzeug 0.3 the list will be mandatory."""
+        HTTPException.__init__(self, description)
+        self.valid_methods = valid_methods
+
+    def get_headers(self, environ=None):
+        headers = HTTPException.get_headers(self, environ)
+        if self.valid_methods:
+            headers.append(("Allow", ", ".join(self.valid_methods)))
+        return headers
+
+
+class NotAcceptable(HTTPException):
+    """*406* `Not Acceptable`
+
+    Raise if the server can't return any content conforming to the
+    `Accept` headers of the client.
+    """
+
+    code = 406
+
+    description = (
+        "The resource identified by the request is only capable of"
+        " generating response entities which have content"
+        " characteristics not acceptable according to the accept"
+        " headers sent in the request."
+    )
+
+
+class RequestTimeout(HTTPException):
+    """*408* `Request Timeout`
+
+    Raise to signalize a timeout.
+    """
+
+    code = 408
+    description = (
+        "The server closed the network connection because the browser"
+        " didn't finish the request within the specified time."
+    )
+
+
+class Conflict(HTTPException):
+    """*409* `Conflict`
+
+    Raise to signal that a request cannot be completed because it conflicts
+    with the current state on the server.
+
+    .. versionadded:: 0.7
+    """
+
+    code = 409
+    description = (
+        "A conflict happened while processing the request. The"
+        " resource might have been modified while the request was being"
+        " processed."
+    )
+
+
+class Gone(HTTPException):
+    """*410* `Gone`
+
+    Raise if a resource existed previously and went away without new location.
+    """
+
+    code = 410
+    description = (
+        "The requested URL is no longer available on this server and"
+        " there is no forwarding address. If you followed a link from a"
+        " foreign page, please contact the author of this page."
+    )
+
+
+class LengthRequired(HTTPException):
+    """*411* `Length Required`
+
+    Raise if the browser submitted data but no ``Content-Length`` header which
+    is required for the kind of processing the server does.
+    """
+
+    code = 411
+    description = (
+        "A request with this method requires a valid <code>Content-"
+        "Length</code> header."
+    )
+
+
+class PreconditionFailed(HTTPException):
+    """*412* `Precondition Failed`
+
+    Status code used in combination with ``If-Match``, ``If-None-Match``, or
+    ``If-Unmodified-Since``.
+    """
+
+    code = 412
+    description = (
+        "The precondition on the request for the URL failed positive evaluation."
+    )
+
+
+class RequestEntityTooLarge(HTTPException):
+    """*413* `Request Entity Too Large`
+
+    The status code one should return if the data submitted exceeded a given
+    limit.
+    """
+
+    code = 413
+    description = "The data value transmitted exceeds the capacity limit."
+
+
+class RequestURITooLarge(HTTPException):
+    """*414* `Request URI Too Large`
+
+    Like *413* but for too long URLs.
+    """
+
+    code = 414
+    description = (
+        "The length of the requested URL exceeds the capacity limit for"
+        " this server. The request cannot be processed."
+    )
+
+
+class UnsupportedMediaType(HTTPException):
+    """*415* `Unsupported Media Type`
+
+    The status code returned if the server is unable to handle the media type
+    the client transmitted.
+    """
+
+    code = 415
+    description = (
+        "The server does not support the media type transmitted in the request."
+    )
+
+
+class RequestedRangeNotSatisfiable(HTTPException):
+    """*416* `Requested Range Not Satisfiable`
+
+    The client asked for an invalid part of the file.
+
+    .. versionadded:: 0.7
+    """
+
+    code = 416
+    description = "The server cannot provide the requested range."
+
+    def __init__(self, length=None, units="bytes", description=None):
+        """Takes an optional `Content-Range` header value based on ``length``
+        parameter.
+        """
+        HTTPException.__init__(self, description)
+        self.length = length
+        self.units = units
+
+    def get_headers(self, environ=None):
+        headers = HTTPException.get_headers(self, environ)
+        if self.length is not None:
+            headers.append(("Content-Range", "%s */%d" % (self.units, self.length)))
+        return headers
+
+
+class ExpectationFailed(HTTPException):
+    """*417* `Expectation Failed`
+
+    The server cannot meet the requirements of the Expect request-header.
+
+    .. versionadded:: 0.7
+    """
+
+    code = 417
+    description = "The server could not meet the requirements of the Expect header"
+
+
+class ImATeapot(HTTPException):
+    """*418* `I'm a teapot`
+
+    The server should return this if it is a teapot and someone attempted
+    to brew coffee with it.
+
+    .. versionadded:: 0.7
+    """
+
+    code = 418
+    description = "This server is a teapot, not a coffee machine"
+
+
+class UnprocessableEntity(HTTPException):
+    """*422* `Unprocessable Entity`
+
+    Used if the request is well formed, but the instructions are otherwise
+    incorrect.
+    """
+
+    code = 422
+    description = (
+        "The request was well-formed but was unable to be followed due"
+        " to semantic errors."
+    )
+
+
+class Locked(HTTPException):
+    """*423* `Locked`
+
+    Used if the resource that is being accessed is locked.
+    """
+
+    code = 423
+    description = "The resource that is being accessed is locked."
+
+
+class FailedDependency(HTTPException):
+    """*424* `Failed Dependency`
+
+    Used if the method could not be performed on the resource
+    because the requested action depended on another action and that action failed.
+    """
+
+    code = 424
+    description = (
+        "The method could not be performed on the resource because the"
+        " requested action depended on another action and that action"
+        " failed."
+    )
+
+
+class PreconditionRequired(HTTPException):
+    """*428* `Precondition Required`
+
+    The server requires this request to be conditional, typically to prevent
+    the lost update problem, which is a race condition between two or more
+    clients attempting to update a resource through PUT or DELETE. By requiring
+    each client to include a conditional header ("If-Match" or "If-Unmodified-
+    Since") with the proper value retained from a recent GET request, the
+    server ensures that each client has at least seen the previous revision of
+    the resource.
+    """
+
+    code = 428
+    description = (
+        "This request is required to be conditional; try using"
+        ' "If-Match" or "If-Unmodified-Since".'
+    )
+
+
+class _RetryAfter(HTTPException):
+    """Adds an optional ``retry_after`` parameter which will set the
+    ``Retry-After`` header. May be an :class:`int` number of seconds or
+    a :class:`~datetime.datetime`.
+    """
+
+    def __init__(self, description=None, response=None, retry_after=None):
+        super(_RetryAfter, self).__init__(description, response)
+        self.retry_after = retry_after
+
+    def get_headers(self, environ=None):
+        headers = super(_RetryAfter, self).get_headers(environ)
+
+        if self.retry_after:
+            if isinstance(self.retry_after, datetime):
+                from .http import http_date
+
+                value = http_date(self.retry_after)
+            else:
+                value = str(self.retry_after)
+
+            headers.append(("Retry-After", value))
+
+        return headers
+
+
+class TooManyRequests(_RetryAfter):
+    """*429* `Too Many Requests`
+
+    The server is limiting the rate at which this user receives
+    responses, and this request exceeds that rate. (The server may use
+    any convenient method to identify users and their request rates).
+    The server may include a "Retry-After" header to indicate how long
+    the user should wait before retrying.
+
+    :param retry_after: If given, set the ``Retry-After`` header to this
+        value. May be an :class:`int` number of seconds or a
+        :class:`~datetime.datetime`.
+
+    .. versionchanged:: 1.0
+        Added ``retry_after`` parameter.
+    """
+
+    code = 429
+    description = "This user has exceeded an allotted request count. Try again later."
+
+
+class RequestHeaderFieldsTooLarge(HTTPException):
+    """*431* `Request Header Fields Too Large`
+
+    The server refuses to process the request because the header fields are too
+    large. One or more individual fields may be too large, or the set of all
+    headers is too large.
+    """
+
+    code = 431
+    description = "One or more header fields exceeds the maximum size."
+
+
+class UnavailableForLegalReasons(HTTPException):
+    """*451* `Unavailable For Legal Reasons`
+
+    This status code indicates that the server is denying access to the
+    resource as a consequence of a legal demand.
+    """
+
+    code = 451
+    description = "Unavailable for legal reasons."
+
+
+class InternalServerError(HTTPException):
+    """*500* `Internal Server Error`
+
+    Raise if an internal server error occurred.  This is a good fallback if an
+    unknown error occurred in the dispatcher.
+
+    .. versionchanged:: 1.0.0
+        Added the :attr:`original_exception` attribute.
+    """
+
+    code = 500
+    description = (
+        "The server encountered an internal error and was unable to"
+        " complete your request. Either the server is overloaded or"
+        " there is an error in the application."
+    )
+
+    def __init__(self, description=None, response=None, original_exception=None):
+        #: The original exception that caused this 500 error. Can be
+        #: used by frameworks to provide context when handling
+        #: unexpected errors.
+        self.original_exception = original_exception
+        super(InternalServerError, self).__init__(
+            description=description, response=response
+        )
+
+
+class NotImplemented(HTTPException):
+    """*501* `Not Implemented`
+
+    Raise if the application does not support the action requested by the
+    browser.
+    """
+
+    code = 501
+    description = "The server does not support the action requested by the browser."
+
+
+class BadGateway(HTTPException):
+    """*502* `Bad Gateway`
+
+    If you do proxying in your application you should return this status code
+    if you received an invalid response from the upstream server it accessed
+    in attempting to fulfill the request.
+    """
+
+    code = 502
+    description = (
+        "The proxy server received an invalid response from an upstream server."
+    )
+
+
+class ServiceUnavailable(_RetryAfter):
+    """*503* `Service Unavailable`
+
+    Status code you should return if a service is temporarily
+    unavailable.
+
+    :param retry_after: If given, set the ``Retry-After`` header to this
+        value. May be an :class:`int` number of seconds or a
+        :class:`~datetime.datetime`.
+
+    .. versionchanged:: 1.0
+        Added ``retry_after`` parameter.
+    """
+
+    code = 503
+    description = (
+        "The server is temporarily unable to service your request due"
+        " to maintenance downtime or capacity problems. Please try"
+        " again later."
+    )
+
+
+class GatewayTimeout(HTTPException):
+    """*504* `Gateway Timeout`
+
+    Status code you should return if a connection to an upstream server
+    times out.
+    """
+
+    code = 504
+    description = "The connection to an upstream server timed out."
+
+
+class HTTPVersionNotSupported(HTTPException):
+    """*505* `HTTP Version Not Supported`
+
+    The server does not support the HTTP protocol version used in the request.
+    """
+
+    code = 505
+    description = (
+        "The server does not support the HTTP protocol version used in the request."
+    )
+
+
+default_exceptions = {}
+__all__ = ["HTTPException"]
+
+
+def _find_exceptions():
+    for _name, obj in iteritems(globals()):
+        try:
+            is_http_exception = issubclass(obj, HTTPException)
+        except TypeError:
+            is_http_exception = False
+        if not is_http_exception or obj.code is None:
+            continue
+        __all__.append(obj.__name__)
+        old_obj = default_exceptions.get(obj.code, None)
+        if old_obj is not None and issubclass(obj, old_obj):
+            continue
+        default_exceptions[obj.code] = obj
+
+
+_find_exceptions()
+del _find_exceptions
+
+
+class Aborter(object):
+    """When passed a dict of code -> exception items it can be used as
+    callable that raises exceptions.  If the first argument to the
+    callable is an integer it will be looked up in the mapping, if it's
+    a WSGI application it will be raised in a proxy exception.
+
+    The rest of the arguments are forwarded to the exception constructor.
+    """
+
+    def __init__(self, mapping=None, extra=None):
+        if mapping is None:
+            mapping = default_exceptions
+        self.mapping = dict(mapping)
+        if extra is not None:
+            self.mapping.update(extra)
+
+    def __call__(self, code, *args, **kwargs):
+        if not args and not kwargs and not isinstance(code, integer_types):
+            raise HTTPException(response=code)
+        if code not in self.mapping:
+            raise LookupError("no exception for %r" % code)
+        raise self.mapping[code](*args, **kwargs)
+
+
+def abort(status, *args, **kwargs):
+    """Raises an :py:exc:`HTTPException` for the given status code or WSGI
+    application.
+
+    If a status code is given, it will be looked up in the list of
+    exceptions and will raise that exception.  If passed a WSGI application,
+    it will wrap it in a proxy WSGI exception and raise that::
+
+       abort(404)  # 404 Not Found
+       abort(Response('Hello World'))
+
+    """
+    return _aborter(status, *args, **kwargs)
+
+
+_aborter = Aborter()
+
+#: An exception that is used to signal both a :exc:`KeyError` and a
+#: :exc:`BadRequest`. Used by many of the datastructures.
+BadRequestKeyError = BadRequest.wrap(KeyError)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/filesystem.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/filesystem.py
new file mode 100644
index 0000000..d016cae
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/filesystem.py
@@ -0,0 +1,64 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.filesystem
+    ~~~~~~~~~~~~~~~~~~~
+
+    Various utilities for the local filesystem.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import codecs
+import sys
+import warnings
+
+# We do not trust traditional unixes.
+has_likely_buggy_unicode_filesystem = (
+    sys.platform.startswith("linux") or "bsd" in sys.platform
+)
+
+
+def _is_ascii_encoding(encoding):
+    """Given an encoding this figures out if the encoding is actually ASCII (which
+    is something we don't actually want in most cases). This is necessary
+    because ASCII comes under many names such as ANSI_X3.4-1968.
+    """
+    if encoding is None:
+        return False
+    try:
+        return codecs.lookup(encoding).name == "ascii"
+    except LookupError:
+        return False
+
+
+class BrokenFilesystemWarning(RuntimeWarning, UnicodeWarning):
+    """The warning used by Werkzeug to signal a broken filesystem. Will only be
+    used once per runtime."""
+
+
+_warned_about_filesystem_encoding = False
+
+
+def get_filesystem_encoding():
+    """Returns the filesystem encoding that should be used. Note that this is
+    different from the Python understanding of the filesystem encoding which
+    might be deeply flawed. Do not use this value against Python's unicode APIs
+    because it might be different. See :ref:`filesystem-encoding` for the exact
+    behavior.
+
+    The concept of a filesystem encoding in generally is not something you
+    should rely on. As such if you ever need to use this function except for
+    writing wrapper code reconsider.
+    """
+    global _warned_about_filesystem_encoding
+    rv = sys.getfilesystemencoding()
+    if has_likely_buggy_unicode_filesystem and not rv or _is_ascii_encoding(rv):
+        if not _warned_about_filesystem_encoding:
+            warnings.warn(
+                "Detected a misconfigured UNIX filesystem: Will use"
+                " UTF-8 as filesystem encoding instead of {0!r}".format(rv),
+                BrokenFilesystemWarning,
+            )
+            _warned_about_filesystem_encoding = True
+        return "utf-8"
+    return rv
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/formparser.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/formparser.py
new file mode 100644
index 0000000..ffdb9b0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/formparser.py
@@ -0,0 +1,584 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.formparser
+    ~~~~~~~~~~~~~~~~~~~
+
+    This module implements the form parsing.  It supports url-encoded forms
+    as well as non-nested multipart uploads.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import codecs
+import re
+from functools import update_wrapper
+from itertools import chain
+from itertools import repeat
+from itertools import tee
+
+from . import exceptions
+from ._compat import BytesIO
+from ._compat import text_type
+from ._compat import to_native
+from .datastructures import FileStorage
+from .datastructures import Headers
+from .datastructures import MultiDict
+from .http import parse_options_header
+from .urls import url_decode_stream
+from .wsgi import get_content_length
+from .wsgi import get_input_stream
+from .wsgi import make_line_iter
+
+# there are some platforms where SpooledTemporaryFile is not available.
+# In that case we need to provide a fallback.
+try:
+    from tempfile import SpooledTemporaryFile
+except ImportError:
+    from tempfile import TemporaryFile
+
+    SpooledTemporaryFile = None
+
+
+#: an iterator that yields empty strings
+_empty_string_iter = repeat("")
+
+#: a regular expression for multipart boundaries
+_multipart_boundary_re = re.compile("^[ -~]{0,200}[!-~]$")
+
+#: supported http encodings that are also available in python we support
+#: for multipart messages.
+_supported_multipart_encodings = frozenset(["base64", "quoted-printable"])
+
+
+def default_stream_factory(
+    total_content_length, filename, content_type, content_length=None
+):
+    """The stream factory that is used per default."""
+    max_size = 1024 * 500
+    if SpooledTemporaryFile is not None:
+        return SpooledTemporaryFile(max_size=max_size, mode="wb+")
+    if total_content_length is None or total_content_length > max_size:
+        return TemporaryFile("wb+")
+    return BytesIO()
+
+
+def parse_form_data(
+    environ,
+    stream_factory=None,
+    charset="utf-8",
+    errors="replace",
+    max_form_memory_size=None,
+    max_content_length=None,
+    cls=None,
+    silent=True,
+):
+    """Parse the form data in the environ and return it as tuple in the form
+    ``(stream, form, files)``.  You should only call this method if the
+    transport method is `POST`, `PUT`, or `PATCH`.
+
+    If the mimetype of the data transmitted is `multipart/form-data` the
+    files multidict will be filled with `FileStorage` objects.  If the
+    mimetype is unknown the input stream is wrapped and returned as first
+    argument, else the stream is empty.
+
+    This is a shortcut for the common usage of :class:`FormDataParser`.
+
+    Have a look at :ref:`dealing-with-request-data` for more details.
+
+    .. versionadded:: 0.5
+       The `max_form_memory_size`, `max_content_length` and
+       `cls` parameters were added.
+
+    .. versionadded:: 0.5.1
+       The optional `silent` flag was added.
+
+    :param environ: the WSGI environment to be used for parsing.
+    :param stream_factory: An optional callable that returns a new read and
+                           writeable file descriptor.  This callable works
+                           the same as :meth:`~BaseResponse._get_file_stream`.
+    :param charset: The character set for URL and url encoded form data.
+    :param errors: The encoding error behavior.
+    :param max_form_memory_size: the maximum number of bytes to be accepted for
+                           in-memory stored form data.  If the data
+                           exceeds the value specified an
+                           :exc:`~exceptions.RequestEntityTooLarge`
+                           exception is raised.
+    :param max_content_length: If this is provided and the transmitted data
+                               is longer than this value an
+                               :exc:`~exceptions.RequestEntityTooLarge`
+                               exception is raised.
+    :param cls: an optional dict class to use.  If this is not specified
+                       or `None` the default :class:`MultiDict` is used.
+    :param silent: If set to False parsing errors will not be caught.
+    :return: A tuple in the form ``(stream, form, files)``.
+    """
+    return FormDataParser(
+        stream_factory,
+        charset,
+        errors,
+        max_form_memory_size,
+        max_content_length,
+        cls,
+        silent,
+    ).parse_from_environ(environ)
+
+
+def exhaust_stream(f):
+    """Helper decorator for methods that exhausts the stream on return."""
+
+    def wrapper(self, stream, *args, **kwargs):
+        try:
+            return f(self, stream, *args, **kwargs)
+        finally:
+            exhaust = getattr(stream, "exhaust", None)
+            if exhaust is not None:
+                exhaust()
+            else:
+                while 1:
+                    chunk = stream.read(1024 * 64)
+                    if not chunk:
+                        break
+
+    return update_wrapper(wrapper, f)
+
+
+class FormDataParser(object):
+    """This class implements parsing of form data for Werkzeug.  By itself
+    it can parse multipart and url encoded form data.  It can be subclassed
+    and extended but for most mimetypes it is a better idea to use the
+    untouched stream and expose it as separate attributes on a request
+    object.
+
+    .. versionadded:: 0.8
+
+    :param stream_factory: An optional callable that returns a new read and
+                           writeable file descriptor.  This callable works
+                           the same as :meth:`~BaseResponse._get_file_stream`.
+    :param charset: The character set for URL and url encoded form data.
+    :param errors: The encoding error behavior.
+    :param max_form_memory_size: the maximum number of bytes to be accepted for
+                           in-memory stored form data.  If the data
+                           exceeds the value specified an
+                           :exc:`~exceptions.RequestEntityTooLarge`
+                           exception is raised.
+    :param max_content_length: If this is provided and the transmitted data
+                               is longer than this value an
+                               :exc:`~exceptions.RequestEntityTooLarge`
+                               exception is raised.
+    :param cls: an optional dict class to use.  If this is not specified
+                       or `None` the default :class:`MultiDict` is used.
+    :param silent: If set to False parsing errors will not be caught.
+    """
+
+    def __init__(
+        self,
+        stream_factory=None,
+        charset="utf-8",
+        errors="replace",
+        max_form_memory_size=None,
+        max_content_length=None,
+        cls=None,
+        silent=True,
+    ):
+        if stream_factory is None:
+            stream_factory = default_stream_factory
+        self.stream_factory = stream_factory
+        self.charset = charset
+        self.errors = errors
+        self.max_form_memory_size = max_form_memory_size
+        self.max_content_length = max_content_length
+        if cls is None:
+            cls = MultiDict
+        self.cls = cls
+        self.silent = silent
+
+    def get_parse_func(self, mimetype, options):
+        return self.parse_functions.get(mimetype)
+
+    def parse_from_environ(self, environ):
+        """Parses the information from the environment as form data.
+
+        :param environ: the WSGI environment to be used for parsing.
+        :return: A tuple in the form ``(stream, form, files)``.
+        """
+        content_type = environ.get("CONTENT_TYPE", "")
+        content_length = get_content_length(environ)
+        mimetype, options = parse_options_header(content_type)
+        return self.parse(get_input_stream(environ), mimetype, content_length, options)
+
+    def parse(self, stream, mimetype, content_length, options=None):
+        """Parses the information from the given stream, mimetype,
+        content length and mimetype parameters.
+
+        :param stream: an input stream
+        :param mimetype: the mimetype of the data
+        :param content_length: the content length of the incoming data
+        :param options: optional mimetype parameters (used for
+                        the multipart boundary for instance)
+        :return: A tuple in the form ``(stream, form, files)``.
+        """
+        if (
+            self.max_content_length is not None
+            and content_length is not None
+            and content_length > self.max_content_length
+        ):
+            raise exceptions.RequestEntityTooLarge()
+        if options is None:
+            options = {}
+
+        parse_func = self.get_parse_func(mimetype, options)
+        if parse_func is not None:
+            try:
+                return parse_func(self, stream, mimetype, content_length, options)
+            except ValueError:
+                if not self.silent:
+                    raise
+
+        return stream, self.cls(), self.cls()
+
+    @exhaust_stream
+    def _parse_multipart(self, stream, mimetype, content_length, options):
+        parser = MultiPartParser(
+            self.stream_factory,
+            self.charset,
+            self.errors,
+            max_form_memory_size=self.max_form_memory_size,
+            cls=self.cls,
+        )
+        boundary = options.get("boundary")
+        if boundary is None:
+            raise ValueError("Missing boundary")
+        if isinstance(boundary, text_type):
+            boundary = boundary.encode("ascii")
+        form, files = parser.parse(stream, boundary, content_length)
+        return stream, form, files
+
+    @exhaust_stream
+    def _parse_urlencoded(self, stream, mimetype, content_length, options):
+        if (
+            self.max_form_memory_size is not None
+            and content_length is not None
+            and content_length > self.max_form_memory_size
+        ):
+            raise exceptions.RequestEntityTooLarge()
+        form = url_decode_stream(stream, self.charset, errors=self.errors, cls=self.cls)
+        return stream, form, self.cls()
+
+    #: mapping of mimetypes to parsing functions
+    parse_functions = {
+        "multipart/form-data": _parse_multipart,
+        "application/x-www-form-urlencoded": _parse_urlencoded,
+        "application/x-url-encoded": _parse_urlencoded,
+    }
+
+
+def is_valid_multipart_boundary(boundary):
+    """Checks if the string given is a valid multipart boundary."""
+    return _multipart_boundary_re.match(boundary) is not None
+
+
+def _line_parse(line):
+    """Removes line ending characters and returns a tuple (`stripped_line`,
+    `is_terminated`).
+    """
+    if line[-2:] in ["\r\n", b"\r\n"]:
+        return line[:-2], True
+    elif line[-1:] in ["\r", "\n", b"\r", b"\n"]:
+        return line[:-1], True
+    return line, False
+
+
+def parse_multipart_headers(iterable):
+    """Parses multipart headers from an iterable that yields lines (including
+    the trailing newline symbol).  The iterable has to be newline terminated.
+
+    The iterable will stop at the line where the headers ended so it can be
+    further consumed.
+
+    :param iterable: iterable of strings that are newline terminated
+    """
+    result = []
+    for line in iterable:
+        line = to_native(line)
+        line, line_terminated = _line_parse(line)
+        if not line_terminated:
+            raise ValueError("unexpected end of line in multipart header")
+        if not line:
+            break
+        elif line[0] in " \t" and result:
+            key, value = result[-1]
+            result[-1] = (key, value + "\n " + line[1:])
+        else:
+            parts = line.split(":", 1)
+            if len(parts) == 2:
+                result.append((parts[0].strip(), parts[1].strip()))
+
+    # we link the list to the headers, no need to create a copy, the
+    # list was not shared anyways.
+    return Headers(result)
+
+
+_begin_form = "begin_form"
+_begin_file = "begin_file"
+_cont = "cont"
+_end = "end"
+
+
+class MultiPartParser(object):
+    def __init__(
+        self,
+        stream_factory=None,
+        charset="utf-8",
+        errors="replace",
+        max_form_memory_size=None,
+        cls=None,
+        buffer_size=64 * 1024,
+    ):
+        self.charset = charset
+        self.errors = errors
+        self.max_form_memory_size = max_form_memory_size
+        self.stream_factory = (
+            default_stream_factory if stream_factory is None else stream_factory
+        )
+        self.cls = MultiDict if cls is None else cls
+
+        # make sure the buffer size is divisible by four so that we can base64
+        # decode chunk by chunk
+        assert buffer_size % 4 == 0, "buffer size has to be divisible by 4"
+        # also the buffer size has to be at least 1024 bytes long or long headers
+        # will freak out the system
+        assert buffer_size >= 1024, "buffer size has to be at least 1KB"
+
+        self.buffer_size = buffer_size
+
+    def _fix_ie_filename(self, filename):
+        """Internet Explorer 6 transmits the full file name if a file is
+        uploaded.  This function strips the full path if it thinks the
+        filename is Windows-like absolute.
+        """
+        if filename[1:3] == ":\\" or filename[:2] == "\\\\":
+            return filename.split("\\")[-1]
+        return filename
+
+    def _find_terminator(self, iterator):
+        """The terminator might have some additional newlines before it.
+        There is at least one application that sends additional newlines
+        before headers (the python setuptools package).
+        """
+        for line in iterator:
+            if not line:
+                break
+            line = line.strip()
+            if line:
+                return line
+        return b""
+
+    def fail(self, message):
+        raise ValueError(message)
+
+    def get_part_encoding(self, headers):
+        transfer_encoding = headers.get("content-transfer-encoding")
+        if (
+            transfer_encoding is not None
+            and transfer_encoding in _supported_multipart_encodings
+        ):
+            return transfer_encoding
+
+    def get_part_charset(self, headers):
+        # Figure out input charset for current part
+        content_type = headers.get("content-type")
+        if content_type:
+            mimetype, ct_params = parse_options_header(content_type)
+            return ct_params.get("charset", self.charset)
+        return self.charset
+
+    def start_file_streaming(self, filename, headers, total_content_length):
+        if isinstance(filename, bytes):
+            filename = filename.decode(self.charset, self.errors)
+        filename = self._fix_ie_filename(filename)
+        content_type = headers.get("content-type")
+        try:
+            content_length = int(headers["content-length"])
+        except (KeyError, ValueError):
+            content_length = 0
+        container = self.stream_factory(
+            total_content_length=total_content_length,
+            filename=filename,
+            content_type=content_type,
+            content_length=content_length,
+        )
+        return filename, container
+
+    def in_memory_threshold_reached(self, bytes):
+        raise exceptions.RequestEntityTooLarge()
+
+    def validate_boundary(self, boundary):
+        if not boundary:
+            self.fail("Missing boundary")
+        if not is_valid_multipart_boundary(boundary):
+            self.fail("Invalid boundary: %s" % boundary)
+        if len(boundary) > self.buffer_size:  # pragma: no cover
+            # this should never happen because we check for a minimum size
+            # of 1024 and boundaries may not be longer than 200.  The only
+            # situation when this happens is for non debug builds where
+            # the assert is skipped.
+            self.fail("Boundary longer than buffer size")
+
+    def parse_lines(self, file, boundary, content_length, cap_at_buffer=True):
+        """Generate parts of
+        ``('begin_form', (headers, name))``
+        ``('begin_file', (headers, name, filename))``
+        ``('cont', bytestring)``
+        ``('end', None)``
+
+        Always obeys the grammar
+        parts = ( begin_form cont* end |
+                  begin_file cont* end )*
+        """
+        next_part = b"--" + boundary
+        last_part = next_part + b"--"
+
+        iterator = chain(
+            make_line_iter(
+                file,
+                limit=content_length,
+                buffer_size=self.buffer_size,
+                cap_at_buffer=cap_at_buffer,
+            ),
+            _empty_string_iter,
+        )
+
+        terminator = self._find_terminator(iterator)
+
+        if terminator == last_part:
+            return
+        elif terminator != next_part:
+            self.fail("Expected boundary at start of multipart data")
+
+        while terminator != last_part:
+            headers = parse_multipart_headers(iterator)
+
+            disposition = headers.get("content-disposition")
+            if disposition is None:
+                self.fail("Missing Content-Disposition header")
+            disposition, extra = parse_options_header(disposition)
+            transfer_encoding = self.get_part_encoding(headers)
+            name = extra.get("name")
+            filename = extra.get("filename")
+
+            # if no content type is given we stream into memory.  A list is
+            # used as a temporary container.
+            if filename is None:
+                yield _begin_form, (headers, name)
+
+            # otherwise we parse the rest of the headers and ask the stream
+            # factory for something we can write in.
+            else:
+                yield _begin_file, (headers, name, filename)
+
+            buf = b""
+            for line in iterator:
+                if not line:
+                    self.fail("unexpected end of stream")
+
+                if line[:2] == b"--":
+                    terminator = line.rstrip()
+                    if terminator in (next_part, last_part):
+                        break
+
+                if transfer_encoding is not None:
+                    if transfer_encoding == "base64":
+                        transfer_encoding = "base64_codec"
+                    try:
+                        line = codecs.decode(line, transfer_encoding)
+                    except Exception:
+                        self.fail("could not decode transfer encoded chunk")
+
+                # we have something in the buffer from the last iteration.
+                # this is usually a newline delimiter.
+                if buf:
+                    yield _cont, buf
+                    buf = b""
+
+                # If the line ends with windows CRLF we write everything except
+                # the last two bytes.  In all other cases however we write
+                # everything except the last byte.  If it was a newline, that's
+                # fine, otherwise it does not matter because we will write it
+                # the next iteration.  this ensures we do not write the
+                # final newline into the stream.  That way we do not have to
+                # truncate the stream.  However we do have to make sure that
+                # if something else than a newline is in there we write it
+                # out.
+                if line[-2:] == b"\r\n":
+                    buf = b"\r\n"
+                    cutoff = -2
+                else:
+                    buf = line[-1:]
+                    cutoff = -1
+                yield _cont, line[:cutoff]
+
+            else:  # pragma: no cover
+                raise ValueError("unexpected end of part")
+
+            # if we have a leftover in the buffer that is not a newline
+            # character we have to flush it, otherwise we will chop of
+            # certain values.
+            if buf not in (b"", b"\r", b"\n", b"\r\n"):
+                yield _cont, buf
+
+            yield _end, None
+
+    def parse_parts(self, file, boundary, content_length):
+        """Generate ``('file', (name, val))`` and
+        ``('form', (name, val))`` parts.
+        """
+        in_memory = 0
+
+        for ellt, ell in self.parse_lines(file, boundary, content_length):
+            if ellt == _begin_file:
+                headers, name, filename = ell
+                is_file = True
+                guard_memory = False
+                filename, container = self.start_file_streaming(
+                    filename, headers, content_length
+                )
+                _write = container.write
+
+            elif ellt == _begin_form:
+                headers, name = ell
+                is_file = False
+                container = []
+                _write = container.append
+                guard_memory = self.max_form_memory_size is not None
+
+            elif ellt == _cont:
+                _write(ell)
+                # if we write into memory and there is a memory size limit we
+                # count the number of bytes in memory and raise an exception if
+                # there is too much data in memory.
+                if guard_memory:
+                    in_memory += len(ell)
+                    if in_memory > self.max_form_memory_size:
+                        self.in_memory_threshold_reached(in_memory)
+
+            elif ellt == _end:
+                if is_file:
+                    container.seek(0)
+                    yield (
+                        "file",
+                        (name, FileStorage(container, filename, name, headers=headers)),
+                    )
+                else:
+                    part_charset = self.get_part_charset(headers)
+                    yield (
+                        "form",
+                        (name, b"".join(container).decode(part_charset, self.errors)),
+                    )
+
+    def parse(self, file, boundary, content_length):
+        formstream, filestream = tee(
+            self.parse_parts(file, boundary, content_length), 2
+        )
+        form = (p[1] for p in formstream if p[0] == "form")
+        files = (p[1] for p in filestream if p[0] == "file")
+        return self.cls(form), self.cls(files)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/http.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/http.py
new file mode 100644
index 0000000..c33293a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/http.py
@@ -0,0 +1,1307 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.http
+    ~~~~~~~~~~~~~
+
+    Werkzeug comes with a bunch of utilities that help Werkzeug to deal with
+    HTTP data.  Most of the classes and functions provided by this module are
+    used by the wrappers, but they are useful on their own, too, especially if
+    the response and request objects are not used.
+
+    This covers some of the more HTTP centric features of WSGI, some other
+    utilities such as cookie handling are documented in the `werkzeug.utils`
+    module.
+
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import base64
+import re
+import warnings
+from datetime import datetime
+from datetime import timedelta
+from hashlib import md5
+from time import gmtime
+from time import time
+
+from ._compat import integer_types
+from ._compat import iteritems
+from ._compat import PY2
+from ._compat import string_types
+from ._compat import text_type
+from ._compat import to_bytes
+from ._compat import to_unicode
+from ._compat import try_coerce_native
+from ._internal import _cookie_parse_impl
+from ._internal import _cookie_quote
+from ._internal import _make_cookie_domain
+
+try:
+    from email.utils import parsedate_tz
+except ImportError:
+    from email.Utils import parsedate_tz
+
+try:
+    from urllib.request import parse_http_list as _parse_list_header
+    from urllib.parse import unquote_to_bytes as _unquote
+except ImportError:
+    from urllib2 import parse_http_list as _parse_list_header
+    from urllib2 import unquote as _unquote
+
+_cookie_charset = "latin1"
+_basic_auth_charset = "utf-8"
+# for explanation of "media-range", etc. see Sections 5.3.{1,2} of RFC 7231
+_accept_re = re.compile(
+    r"""
+    (                       # media-range capturing-parenthesis
+      [^\s;,]+              # type/subtype
+      (?:[ \t]*;[ \t]*      # ";"
+        (?:                 # parameter non-capturing-parenthesis
+          [^\s;,q][^\s;,]*  # token that doesn't start with "q"
+        |                   # or
+          q[^\s;,=][^\s;,]* # token that is more than just "q"
+        )
+      )*                    # zero or more parameters
+    )                       # end of media-range
+    (?:[ \t]*;[ \t]*q=      # weight is a "q" parameter
+      (\d*(?:\.\d+)?)       # qvalue capturing-parentheses
+      [^,]*                 # "extension" accept params: who cares?
+    )?                      # accept params are optional
+    """,
+    re.VERBOSE,
+)
+_token_chars = frozenset(
+    "!#$%&'*+-.0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ^_`abcdefghijklmnopqrstuvwxyz|~"
+)
+_etag_re = re.compile(r'([Ww]/)?(?:"(.*?)"|(.*?))(?:\s*,\s*|$)')
+_unsafe_header_chars = set('()<>@,;:"/[]?={} \t')
+_option_header_piece_re = re.compile(
+    r"""
+    ;\s*,?\s*  # newlines were replaced with commas
+    (?P<key>
+        "[^"\\]*(?:\\.[^"\\]*)*"  # quoted string
+    |
+        [^\s;,=*]+  # token
+    )
+    (?:\*(?P<count>\d+))?  # *1, optional continuation index
+    \s*
+    (?:  # optionally followed by =value
+        (?:  # equals sign, possibly with encoding
+            \*\s*=\s*  # * indicates extended notation
+            (?:  # optional encoding
+                (?P<encoding>[^\s]+?)
+                '(?P<language>[^\s]*?)'
+            )?
+        |
+            =\s*  # basic notation
+        )
+        (?P<value>
+            "[^"\\]*(?:\\.[^"\\]*)*"  # quoted string
+        |
+            [^;,]+  # token
+        )?
+    )?
+    \s*
+    """,
+    flags=re.VERBOSE,
+)
+_option_header_start_mime_type = re.compile(r",\s*([^;,\s]+)([;,]\s*.+)?")
+
+_entity_headers = frozenset(
+    [
+        "allow",
+        "content-encoding",
+        "content-language",
+        "content-length",
+        "content-location",
+        "content-md5",
+        "content-range",
+        "content-type",
+        "expires",
+        "last-modified",
+    ]
+)
+_hop_by_hop_headers = frozenset(
+    [
+        "connection",
+        "keep-alive",
+        "proxy-authenticate",
+        "proxy-authorization",
+        "te",
+        "trailer",
+        "transfer-encoding",
+        "upgrade",
+    ]
+)
+
+
+HTTP_STATUS_CODES = {
+    100: "Continue",
+    101: "Switching Protocols",
+    102: "Processing",
+    103: "Early Hints",  # see RFC 8297
+    200: "OK",
+    201: "Created",
+    202: "Accepted",
+    203: "Non Authoritative Information",
+    204: "No Content",
+    205: "Reset Content",
+    206: "Partial Content",
+    207: "Multi Status",
+    208: "Already Reported",  # see RFC 5842
+    226: "IM Used",  # see RFC 3229
+    300: "Multiple Choices",
+    301: "Moved Permanently",
+    302: "Found",
+    303: "See Other",
+    304: "Not Modified",
+    305: "Use Proxy",
+    306: "Switch Proxy",  # unused
+    307: "Temporary Redirect",
+    308: "Permanent Redirect",
+    400: "Bad Request",
+    401: "Unauthorized",
+    402: "Payment Required",  # unused
+    403: "Forbidden",
+    404: "Not Found",
+    405: "Method Not Allowed",
+    406: "Not Acceptable",
+    407: "Proxy Authentication Required",
+    408: "Request Timeout",
+    409: "Conflict",
+    410: "Gone",
+    411: "Length Required",
+    412: "Precondition Failed",
+    413: "Request Entity Too Large",
+    414: "Request URI Too Long",
+    415: "Unsupported Media Type",
+    416: "Requested Range Not Satisfiable",
+    417: "Expectation Failed",
+    418: "I'm a teapot",  # see RFC 2324
+    421: "Misdirected Request",  # see RFC 7540
+    422: "Unprocessable Entity",
+    423: "Locked",
+    424: "Failed Dependency",
+    425: "Too Early",  # see RFC 8470
+    426: "Upgrade Required",
+    428: "Precondition Required",  # see RFC 6585
+    429: "Too Many Requests",
+    431: "Request Header Fields Too Large",
+    449: "Retry With",  # proprietary MS extension
+    451: "Unavailable For Legal Reasons",
+    500: "Internal Server Error",
+    501: "Not Implemented",
+    502: "Bad Gateway",
+    503: "Service Unavailable",
+    504: "Gateway Timeout",
+    505: "HTTP Version Not Supported",
+    506: "Variant Also Negotiates",  # see RFC 2295
+    507: "Insufficient Storage",
+    508: "Loop Detected",  # see RFC 5842
+    510: "Not Extended",
+    511: "Network Authentication Failed",  # see RFC 6585
+}
+
+
+def wsgi_to_bytes(data):
+    """coerce wsgi unicode represented bytes to real ones"""
+    if isinstance(data, bytes):
+        return data
+    return data.encode("latin1")  # XXX: utf8 fallback?
+
+
+def bytes_to_wsgi(data):
+    assert isinstance(data, bytes), "data must be bytes"
+    if isinstance(data, str):
+        return data
+    else:
+        return data.decode("latin1")
+
+
+def quote_header_value(value, extra_chars="", allow_token=True):
+    """Quote a header value if necessary.
+
+    .. versionadded:: 0.5
+
+    :param value: the value to quote.
+    :param extra_chars: a list of extra characters to skip quoting.
+    :param allow_token: if this is enabled token values are returned
+                        unchanged.
+    """
+    if isinstance(value, bytes):
+        value = bytes_to_wsgi(value)
+    value = str(value)
+    if allow_token:
+        token_chars = _token_chars | set(extra_chars)
+        if set(value).issubset(token_chars):
+            return value
+    return '"%s"' % value.replace("\\", "\\\\").replace('"', '\\"')
+
+
+def unquote_header_value(value, is_filename=False):
+    r"""Unquotes a header value.  (Reversal of :func:`quote_header_value`).
+    This does not use the real unquoting but what browsers are actually
+    using for quoting.
+
+    .. versionadded:: 0.5
+
+    :param value: the header value to unquote.
+    """
+    if value and value[0] == value[-1] == '"':
+        # this is not the real unquoting, but fixing this so that the
+        # RFC is met will result in bugs with internet explorer and
+        # probably some other browsers as well.  IE for example is
+        # uploading files with "C:\foo\bar.txt" as filename
+        value = value[1:-1]
+
+        # if this is a filename and the starting characters look like
+        # a UNC path, then just return the value without quotes.  Using the
+        # replace sequence below on a UNC path has the effect of turning
+        # the leading double slash into a single slash and then
+        # _fix_ie_filename() doesn't work correctly.  See #458.
+        if not is_filename or value[:2] != "\\\\":
+            return value.replace("\\\\", "\\").replace('\\"', '"')
+    return value
+
+
+def dump_options_header(header, options):
+    """The reverse function to :func:`parse_options_header`.
+
+    :param header: the header to dump
+    :param options: a dict of options to append.
+    """
+    segments = []
+    if header is not None:
+        segments.append(header)
+    for key, value in iteritems(options):
+        if value is None:
+            segments.append(key)
+        else:
+            segments.append("%s=%s" % (key, quote_header_value(value)))
+    return "; ".join(segments)
+
+
+def dump_header(iterable, allow_token=True):
+    """Dump an HTTP header again.  This is the reversal of
+    :func:`parse_list_header`, :func:`parse_set_header` and
+    :func:`parse_dict_header`.  This also quotes strings that include an
+    equals sign unless you pass it as dict of key, value pairs.
+
+    >>> dump_header({'foo': 'bar baz'})
+    'foo="bar baz"'
+    >>> dump_header(('foo', 'bar baz'))
+    'foo, "bar baz"'
+
+    :param iterable: the iterable or dict of values to quote.
+    :param allow_token: if set to `False` tokens as values are disallowed.
+                        See :func:`quote_header_value` for more details.
+    """
+    if isinstance(iterable, dict):
+        items = []
+        for key, value in iteritems(iterable):
+            if value is None:
+                items.append(key)
+            else:
+                items.append(
+                    "%s=%s" % (key, quote_header_value(value, allow_token=allow_token))
+                )
+    else:
+        items = [quote_header_value(x, allow_token=allow_token) for x in iterable]
+    return ", ".join(items)
+
+
+def dump_csp_header(header):
+    """Dump a Content Security Policy header.
+
+    These are structured into policies such as "default-src 'self';
+    script-src 'self'".
+
+    .. versionadded:: 1.0.0
+       Support for Content Security Policy headers was added.
+
+    """
+    return "; ".join("%s %s" % (key, value) for key, value in iteritems(header))
+
+
+def parse_list_header(value):
+    """Parse lists as described by RFC 2068 Section 2.
+
+    In particular, parse comma-separated lists where the elements of
+    the list may include quoted-strings.  A quoted-string could
+    contain a comma.  A non-quoted string could have quotes in the
+    middle.  Quotes are removed automatically after parsing.
+
+    It basically works like :func:`parse_set_header` just that items
+    may appear multiple times and case sensitivity is preserved.
+
+    The return value is a standard :class:`list`:
+
+    >>> parse_list_header('token, "quoted value"')
+    ['token', 'quoted value']
+
+    To create a header from the :class:`list` again, use the
+    :func:`dump_header` function.
+
+    :param value: a string with a list header.
+    :return: :class:`list`
+    """
+    result = []
+    for item in _parse_list_header(value):
+        if item[:1] == item[-1:] == '"':
+            item = unquote_header_value(item[1:-1])
+        result.append(item)
+    return result
+
+
+def parse_dict_header(value, cls=dict):
+    """Parse lists of key, value pairs as described by RFC 2068 Section 2 and
+    convert them into a python dict (or any other mapping object created from
+    the type with a dict like interface provided by the `cls` argument):
+
+    >>> d = parse_dict_header('foo="is a fish", bar="as well"')
+    >>> type(d) is dict
+    True
+    >>> sorted(d.items())
+    [('bar', 'as well'), ('foo', 'is a fish')]
+
+    If there is no value for a key it will be `None`:
+
+    >>> parse_dict_header('key_without_value')
+    {'key_without_value': None}
+
+    To create a header from the :class:`dict` again, use the
+    :func:`dump_header` function.
+
+    .. versionchanged:: 0.9
+       Added support for `cls` argument.
+
+    :param value: a string with a dict header.
+    :param cls: callable to use for storage of parsed results.
+    :return: an instance of `cls`
+    """
+    result = cls()
+    if not isinstance(value, text_type):
+        # XXX: validate
+        value = bytes_to_wsgi(value)
+    for item in _parse_list_header(value):
+        if "=" not in item:
+            result[item] = None
+            continue
+        name, value = item.split("=", 1)
+        if value[:1] == value[-1:] == '"':
+            value = unquote_header_value(value[1:-1])
+        result[name] = value
+    return result
+
+
+def parse_options_header(value, multiple=False):
+    """Parse a ``Content-Type`` like header into a tuple with the content
+    type and the options:
+
+    >>> parse_options_header('text/html; charset=utf8')
+    ('text/html', {'charset': 'utf8'})
+
+    This should not be used to parse ``Cache-Control`` like headers that use
+    a slightly different format.  For these headers use the
+    :func:`parse_dict_header` function.
+
+    .. versionchanged:: 0.15
+        :rfc:`2231` parameter continuations are handled.
+
+    .. versionadded:: 0.5
+
+    :param value: the header to parse.
+    :param multiple: Whether try to parse and return multiple MIME types
+    :return: (mimetype, options) or (mimetype, options, mimetype, options, …)
+             if multiple=True
+    """
+    if not value:
+        return "", {}
+
+    result = []
+
+    value = "," + value.replace("\n", ",")
+    while value:
+        match = _option_header_start_mime_type.match(value)
+        if not match:
+            break
+        result.append(match.group(1))  # mimetype
+        options = {}
+        # Parse options
+        rest = match.group(2)
+        continued_encoding = None
+        while rest:
+            optmatch = _option_header_piece_re.match(rest)
+            if not optmatch:
+                break
+            option, count, encoding, language, option_value = optmatch.groups()
+            # Continuations don't have to supply the encoding after the
+            # first line. If we're in a continuation, track the current
+            # encoding to use for subsequent lines. Reset it when the
+            # continuation ends.
+            if not count:
+                continued_encoding = None
+            else:
+                if not encoding:
+                    encoding = continued_encoding
+                continued_encoding = encoding
+            option = unquote_header_value(option)
+            if option_value is not None:
+                option_value = unquote_header_value(option_value, option == "filename")
+                if encoding is not None:
+                    option_value = _unquote(option_value).decode(encoding)
+            if count:
+                # Continuations append to the existing value. For
+                # simplicity, this ignores the possibility of
+                # out-of-order indices, which shouldn't happen anyway.
+                options[option] = options.get(option, "") + option_value
+            else:
+                options[option] = option_value
+            rest = rest[optmatch.end() :]
+        result.append(options)
+        if multiple is False:
+            return tuple(result)
+        value = rest
+
+    return tuple(result) if result else ("", {})
+
+
+def parse_accept_header(value, cls=None):
+    """Parses an HTTP Accept-* header.  This does not implement a complete
+    valid algorithm but one that supports at least value and quality
+    extraction.
+
+    Returns a new :class:`Accept` object (basically a list of ``(value, quality)``
+    tuples sorted by the quality with some additional accessor methods).
+
+    The second parameter can be a subclass of :class:`Accept` that is created
+    with the parsed values and returned.
+
+    :param value: the accept header string to be parsed.
+    :param cls: the wrapper class for the return value (can be
+                         :class:`Accept` or a subclass thereof)
+    :return: an instance of `cls`.
+    """
+    if cls is None:
+        cls = Accept
+
+    if not value:
+        return cls(None)
+
+    result = []
+    for match in _accept_re.finditer(value):
+        quality = match.group(2)
+        if not quality:
+            quality = 1
+        else:
+            quality = max(min(float(quality), 1), 0)
+        result.append((match.group(1), quality))
+    return cls(result)
+
+
+def parse_cache_control_header(value, on_update=None, cls=None):
+    """Parse a cache control header.  The RFC differs between response and
+    request cache control, this method does not.  It's your responsibility
+    to not use the wrong control statements.
+
+    .. versionadded:: 0.5
+       The `cls` was added.  If not specified an immutable
+       :class:`~werkzeug.datastructures.RequestCacheControl` is returned.
+
+    :param value: a cache control header to be parsed.
+    :param on_update: an optional callable that is called every time a value
+                      on the :class:`~werkzeug.datastructures.CacheControl`
+                      object is changed.
+    :param cls: the class for the returned object.  By default
+                :class:`~werkzeug.datastructures.RequestCacheControl` is used.
+    :return: a `cls` object.
+    """
+    if cls is None:
+        cls = RequestCacheControl
+    if not value:
+        return cls(None, on_update)
+    return cls(parse_dict_header(value), on_update)
+
+
+def parse_csp_header(value, on_update=None, cls=None):
+    """Parse a Content Security Policy header.
+
+    .. versionadded:: 1.0.0
+       Support for Content Security Policy headers was added.
+
+    :param value: a csp header to be parsed.
+    :param on_update: an optional callable that is called every time a value
+                      on the object is changed.
+    :param cls: the class for the returned object.  By default
+                :class:`~werkzeug.datastructures.ContentSecurityPolicy` is used.
+    :return: a `cls` object.
+    """
+
+    if cls is None:
+        cls = ContentSecurityPolicy
+    if value is None:
+        return cls(None, on_update)
+    items = []
+    for policy in value.split(";"):
+        policy = policy.strip()
+        # Ignore badly formatted policies (no space)
+        if " " in policy:
+            directive, value = policy.strip().split(" ", 1)
+            items.append((directive.strip(), value.strip()))
+    return cls(items, on_update)
+
+
+def parse_set_header(value, on_update=None):
+    """Parse a set-like header and return a
+    :class:`~werkzeug.datastructures.HeaderSet` object:
+
+    >>> hs = parse_set_header('token, "quoted value"')
+
+    The return value is an object that treats the items case-insensitively
+    and keeps the order of the items:
+
+    >>> 'TOKEN' in hs
+    True
+    >>> hs.index('quoted value')
+    1
+    >>> hs
+    HeaderSet(['token', 'quoted value'])
+
+    To create a header from the :class:`HeaderSet` again, use the
+    :func:`dump_header` function.
+
+    :param value: a set header to be parsed.
+    :param on_update: an optional callable that is called every time a
+                      value on the :class:`~werkzeug.datastructures.HeaderSet`
+                      object is changed.
+    :return: a :class:`~werkzeug.datastructures.HeaderSet`
+    """
+    if not value:
+        return HeaderSet(None, on_update)
+    return HeaderSet(parse_list_header(value), on_update)
+
+
+def parse_authorization_header(value):
+    """Parse an HTTP basic/digest authorization header transmitted by the web
+    browser.  The return value is either `None` if the header was invalid or
+    not given, otherwise an :class:`~werkzeug.datastructures.Authorization`
+    object.
+
+    :param value: the authorization header to parse.
+    :return: a :class:`~werkzeug.datastructures.Authorization` object or `None`.
+    """
+    if not value:
+        return
+    value = wsgi_to_bytes(value)
+    try:
+        auth_type, auth_info = value.split(None, 1)
+        auth_type = auth_type.lower()
+    except ValueError:
+        return
+    if auth_type == b"basic":
+        try:
+            username, password = base64.b64decode(auth_info).split(b":", 1)
+        except Exception:
+            return
+        return Authorization(
+            "basic",
+            {
+                "username": to_unicode(username, _basic_auth_charset),
+                "password": to_unicode(password, _basic_auth_charset),
+            },
+        )
+    elif auth_type == b"digest":
+        auth_map = parse_dict_header(auth_info)
+        for key in "username", "realm", "nonce", "uri", "response":
+            if key not in auth_map:
+                return
+        if "qop" in auth_map:
+            if not auth_map.get("nc") or not auth_map.get("cnonce"):
+                return
+        return Authorization("digest", auth_map)
+
+
+def parse_www_authenticate_header(value, on_update=None):
+    """Parse an HTTP WWW-Authenticate header into a
+    :class:`~werkzeug.datastructures.WWWAuthenticate` object.
+
+    :param value: a WWW-Authenticate header to parse.
+    :param on_update: an optional callable that is called every time a value
+                      on the :class:`~werkzeug.datastructures.WWWAuthenticate`
+                      object is changed.
+    :return: a :class:`~werkzeug.datastructures.WWWAuthenticate` object.
+    """
+    if not value:
+        return WWWAuthenticate(on_update=on_update)
+    try:
+        auth_type, auth_info = value.split(None, 1)
+        auth_type = auth_type.lower()
+    except (ValueError, AttributeError):
+        return WWWAuthenticate(value.strip().lower(), on_update=on_update)
+    return WWWAuthenticate(auth_type, parse_dict_header(auth_info), on_update)
+
+
+def parse_if_range_header(value):
+    """Parses an if-range header which can be an etag or a date.  Returns
+    a :class:`~werkzeug.datastructures.IfRange` object.
+
+    .. versionadded:: 0.7
+    """
+    if not value:
+        return IfRange()
+    date = parse_date(value)
+    if date is not None:
+        return IfRange(date=date)
+    # drop weakness information
+    return IfRange(unquote_etag(value)[0])
+
+
+def parse_range_header(value, make_inclusive=True):
+    """Parses a range header into a :class:`~werkzeug.datastructures.Range`
+    object.  If the header is missing or malformed `None` is returned.
+    `ranges` is a list of ``(start, stop)`` tuples where the ranges are
+    non-inclusive.
+
+    .. versionadded:: 0.7
+    """
+    if not value or "=" not in value:
+        return None
+
+    ranges = []
+    last_end = 0
+    units, rng = value.split("=", 1)
+    units = units.strip().lower()
+
+    for item in rng.split(","):
+        item = item.strip()
+        if "-" not in item:
+            return None
+        if item.startswith("-"):
+            if last_end < 0:
+                return None
+            try:
+                begin = int(item)
+            except ValueError:
+                return None
+            end = None
+            last_end = -1
+        elif "-" in item:
+            begin, end = item.split("-", 1)
+            begin = begin.strip()
+            end = end.strip()
+            if not begin.isdigit():
+                return None
+            begin = int(begin)
+            if begin < last_end or last_end < 0:
+                return None
+            if end:
+                if not end.isdigit():
+                    return None
+                end = int(end) + 1
+                if begin >= end:
+                    return None
+            else:
+                end = None
+            last_end = end
+        ranges.append((begin, end))
+
+    return Range(units, ranges)
+
+
+def parse_content_range_header(value, on_update=None):
+    """Parses a range header into a
+    :class:`~werkzeug.datastructures.ContentRange` object or `None` if
+    parsing is not possible.
+
+    .. versionadded:: 0.7
+
+    :param value: a content range header to be parsed.
+    :param on_update: an optional callable that is called every time a value
+                      on the :class:`~werkzeug.datastructures.ContentRange`
+                      object is changed.
+    """
+    if value is None:
+        return None
+    try:
+        units, rangedef = (value or "").strip().split(None, 1)
+    except ValueError:
+        return None
+
+    if "/" not in rangedef:
+        return None
+    rng, length = rangedef.split("/", 1)
+    if length == "*":
+        length = None
+    elif length.isdigit():
+        length = int(length)
+    else:
+        return None
+
+    if rng == "*":
+        return ContentRange(units, None, None, length, on_update=on_update)
+    elif "-" not in rng:
+        return None
+
+    start, stop = rng.split("-", 1)
+    try:
+        start = int(start)
+        stop = int(stop) + 1
+    except ValueError:
+        return None
+
+    if is_byte_range_valid(start, stop, length):
+        return ContentRange(units, start, stop, length, on_update=on_update)
+
+
+def quote_etag(etag, weak=False):
+    """Quote an etag.
+
+    :param etag: the etag to quote.
+    :param weak: set to `True` to tag it "weak".
+    """
+    if '"' in etag:
+        raise ValueError("invalid etag")
+    etag = '"%s"' % etag
+    if weak:
+        etag = "W/" + etag
+    return etag
+
+
+def unquote_etag(etag):
+    """Unquote a single etag:
+
+    >>> unquote_etag('W/"bar"')
+    ('bar', True)
+    >>> unquote_etag('"bar"')
+    ('bar', False)
+
+    :param etag: the etag identifier to unquote.
+    :return: a ``(etag, weak)`` tuple.
+    """
+    if not etag:
+        return None, None
+    etag = etag.strip()
+    weak = False
+    if etag.startswith(("W/", "w/")):
+        weak = True
+        etag = etag[2:]
+    if etag[:1] == etag[-1:] == '"':
+        etag = etag[1:-1]
+    return etag, weak
+
+
+def parse_etags(value):
+    """Parse an etag header.
+
+    :param value: the tag header to parse
+    :return: an :class:`~werkzeug.datastructures.ETags` object.
+    """
+    if not value:
+        return ETags()
+    strong = []
+    weak = []
+    end = len(value)
+    pos = 0
+    while pos < end:
+        match = _etag_re.match(value, pos)
+        if match is None:
+            break
+        is_weak, quoted, raw = match.groups()
+        if raw == "*":
+            return ETags(star_tag=True)
+        elif quoted:
+            raw = quoted
+        if is_weak:
+            weak.append(raw)
+        else:
+            strong.append(raw)
+        pos = match.end()
+    return ETags(strong, weak)
+
+
+def generate_etag(data):
+    """Generate an etag for some data."""
+    return md5(data).hexdigest()
+
+
+def parse_date(value):
+    """Parse one of the following date formats into a datetime object:
+
+    .. sourcecode:: text
+
+        Sun, 06 Nov 1994 08:49:37 GMT  ; RFC 822, updated by RFC 1123
+        Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
+        Sun Nov  6 08:49:37 1994       ; ANSI C's asctime() format
+
+    If parsing fails the return value is `None`.
+
+    :param value: a string with a supported date format.
+    :return: a :class:`datetime.datetime` object.
+    """
+    if value:
+        t = parsedate_tz(value.strip())
+        if t is not None:
+            try:
+                year = t[0]
+                # unfortunately that function does not tell us if two digit
+                # years were part of the string, or if they were prefixed
+                # with two zeroes.  So what we do is to assume that 69-99
+                # refer to 1900, and everything below to 2000
+                if year >= 0 and year <= 68:
+                    year += 2000
+                elif year >= 69 and year <= 99:
+                    year += 1900
+                return datetime(*((year,) + t[1:7])) - timedelta(seconds=t[-1] or 0)
+            except (ValueError, OverflowError):
+                return None
+
+
+def _dump_date(d, delim):
+    """Used for `http_date` and `cookie_date`."""
+    if d is None:
+        d = gmtime()
+    elif isinstance(d, datetime):
+        d = d.utctimetuple()
+    elif isinstance(d, (integer_types, float)):
+        d = gmtime(d)
+    return "%s, %02d%s%s%s%04d %02d:%02d:%02d GMT" % (
+        ("Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun")[d.tm_wday],
+        d.tm_mday,
+        delim,
+        (
+            "Jan",
+            "Feb",
+            "Mar",
+            "Apr",
+            "May",
+            "Jun",
+            "Jul",
+            "Aug",
+            "Sep",
+            "Oct",
+            "Nov",
+            "Dec",
+        )[d.tm_mon - 1],
+        delim,
+        d.tm_year,
+        d.tm_hour,
+        d.tm_min,
+        d.tm_sec,
+    )
+
+
+def cookie_date(expires=None):
+    """Formats the time to ensure compatibility with Netscape's cookie
+    standard.
+
+    Accepts a floating point number expressed in seconds since the epoch in, a
+    datetime object or a timetuple.  All times in UTC.  The :func:`parse_date`
+    function can be used to parse such a date.
+
+    Outputs a string in the format ``Wdy, DD-Mon-YYYY HH:MM:SS GMT``.
+
+    :param expires: If provided that date is used, otherwise the current.
+    """
+    return _dump_date(expires, "-")
+
+
+def http_date(timestamp=None):
+    """Formats the time to match the RFC1123 date format.
+
+    Accepts a floating point number expressed in seconds since the epoch in, a
+    datetime object or a timetuple.  All times in UTC.  The :func:`parse_date`
+    function can be used to parse such a date.
+
+    Outputs a string in the format ``Wdy, DD Mon YYYY HH:MM:SS GMT``.
+
+    :param timestamp: If provided that date is used, otherwise the current.
+    """
+    return _dump_date(timestamp, " ")
+
+
+def parse_age(value=None):
+    """Parses a base-10 integer count of seconds into a timedelta.
+
+    If parsing fails, the return value is `None`.
+
+    :param value: a string consisting of an integer represented in base-10
+    :return: a :class:`datetime.timedelta` object or `None`.
+    """
+    if not value:
+        return None
+    try:
+        seconds = int(value)
+    except ValueError:
+        return None
+    if seconds < 0:
+        return None
+    try:
+        return timedelta(seconds=seconds)
+    except OverflowError:
+        return None
+
+
+def dump_age(age=None):
+    """Formats the duration as a base-10 integer.
+
+    :param age: should be an integer number of seconds,
+                a :class:`datetime.timedelta` object, or,
+                if the age is unknown, `None` (default).
+    """
+    if age is None:
+        return
+    if isinstance(age, timedelta):
+        # do the equivalent of Python 2.7's timedelta.total_seconds(),
+        # but disregarding fractional seconds
+        age = age.seconds + (age.days * 24 * 3600)
+
+    age = int(age)
+    if age < 0:
+        raise ValueError("age cannot be negative")
+
+    return str(age)
+
+
+def is_resource_modified(
+    environ, etag=None, data=None, last_modified=None, ignore_if_range=True
+):
+    """Convenience method for conditional requests.
+
+    :param environ: the WSGI environment of the request to be checked.
+    :param etag: the etag for the response for comparison.
+    :param data: or alternatively the data of the response to automatically
+                 generate an etag using :func:`generate_etag`.
+    :param last_modified: an optional date of the last modification.
+    :param ignore_if_range: If `False`, `If-Range` header will be taken into
+                            account.
+    :return: `True` if the resource was modified, otherwise `False`.
+
+    .. versionchanged:: 1.0.0
+        The check is run for methods other than ``GET`` and ``HEAD``.
+    """
+    if etag is None and data is not None:
+        etag = generate_etag(data)
+    elif data is not None:
+        raise TypeError("both data and etag given")
+
+    unmodified = False
+    if isinstance(last_modified, string_types):
+        last_modified = parse_date(last_modified)
+
+    # ensure that microsecond is zero because the HTTP spec does not transmit
+    # that either and we might have some false positives.  See issue #39
+    if last_modified is not None:
+        last_modified = last_modified.replace(microsecond=0)
+
+    if_range = None
+    if not ignore_if_range and "HTTP_RANGE" in environ:
+        # https://tools.ietf.org/html/rfc7233#section-3.2
+        # A server MUST ignore an If-Range header field received in a request
+        # that does not contain a Range header field.
+        if_range = parse_if_range_header(environ.get("HTTP_IF_RANGE"))
+
+    if if_range is not None and if_range.date is not None:
+        modified_since = if_range.date
+    else:
+        modified_since = parse_date(environ.get("HTTP_IF_MODIFIED_SINCE"))
+
+    if modified_since and last_modified and last_modified <= modified_since:
+        unmodified = True
+
+    if etag:
+        etag, _ = unquote_etag(etag)
+        if if_range is not None and if_range.etag is not None:
+            unmodified = parse_etags(if_range.etag).contains(etag)
+        else:
+            if_none_match = parse_etags(environ.get("HTTP_IF_NONE_MATCH"))
+            if if_none_match:
+                # https://tools.ietf.org/html/rfc7232#section-3.2
+                # "A recipient MUST use the weak comparison function when comparing
+                # entity-tags for If-None-Match"
+                unmodified = if_none_match.contains_weak(etag)
+
+            # https://tools.ietf.org/html/rfc7232#section-3.1
+            # "Origin server MUST use the strong comparison function when
+            # comparing entity-tags for If-Match"
+            if_match = parse_etags(environ.get("HTTP_IF_MATCH"))
+            if if_match:
+                unmodified = not if_match.is_strong(etag)
+
+    return not unmodified
+
+
+def remove_entity_headers(headers, allowed=("expires", "content-location")):
+    """Remove all entity headers from a list or :class:`Headers` object.  This
+    operation works in-place.  `Expires` and `Content-Location` headers are
+    by default not removed.  The reason for this is :rfc:`2616` section
+    10.3.5 which specifies some entity headers that should be sent.
+
+    .. versionchanged:: 0.5
+       added `allowed` parameter.
+
+    :param headers: a list or :class:`Headers` object.
+    :param allowed: a list of headers that should still be allowed even though
+                    they are entity headers.
+    """
+    allowed = set(x.lower() for x in allowed)
+    headers[:] = [
+        (key, value)
+        for key, value in headers
+        if not is_entity_header(key) or key.lower() in allowed
+    ]
+
+
+def remove_hop_by_hop_headers(headers):
+    """Remove all HTTP/1.1 "Hop-by-Hop" headers from a list or
+    :class:`Headers` object.  This operation works in-place.
+
+    .. versionadded:: 0.5
+
+    :param headers: a list or :class:`Headers` object.
+    """
+    headers[:] = [
+        (key, value) for key, value in headers if not is_hop_by_hop_header(key)
+    ]
+
+
+def is_entity_header(header):
+    """Check if a header is an entity header.
+
+    .. versionadded:: 0.5
+
+    :param header: the header to test.
+    :return: `True` if it's an entity header, `False` otherwise.
+    """
+    return header.lower() in _entity_headers
+
+
+def is_hop_by_hop_header(header):
+    """Check if a header is an HTTP/1.1 "Hop-by-Hop" header.
+
+    .. versionadded:: 0.5
+
+    :param header: the header to test.
+    :return: `True` if it's an HTTP/1.1 "Hop-by-Hop" header, `False` otherwise.
+    """
+    return header.lower() in _hop_by_hop_headers
+
+
+def parse_cookie(header, charset="utf-8", errors="replace", cls=None):
+    """Parse a cookie from a string or WSGI environ.
+
+    The same key can be provided multiple times, the values are stored
+    in-order. The default :class:`MultiDict` will have the first value
+    first, and all values can be retrieved with
+    :meth:`MultiDict.getlist`.
+
+    :param header: The cookie header as a string, or a WSGI environ dict
+        with a ``HTTP_COOKIE`` key.
+    :param charset: The charset for the cookie values.
+    :param errors: The error behavior for the charset decoding.
+    :param cls: A dict-like class to store the parsed cookies in.
+        Defaults to :class:`MultiDict`.
+
+    .. versionchanged:: 1.0.0
+        Returns a :class:`MultiDict` instead of a
+        ``TypeConversionDict``.
+
+    .. versionchanged:: 0.5
+       Returns a :class:`TypeConversionDict` instead of a regular dict.
+       The ``cls`` parameter was added.
+    """
+    if isinstance(header, dict):
+        header = header.get("HTTP_COOKIE", "")
+    elif header is None:
+        header = ""
+
+    # On Python 3, PEP 3333 sends headers through the environ as latin1
+    # decoded strings. Encode strings back to bytes for parsing.
+    if isinstance(header, text_type):
+        header = header.encode("latin1", "replace")
+
+    if cls is None:
+        cls = MultiDict
+
+    def _parse_pairs():
+        for key, val in _cookie_parse_impl(header):
+            key = to_unicode(key, charset, errors, allow_none_charset=True)
+            if not key:
+                continue
+            val = to_unicode(val, charset, errors, allow_none_charset=True)
+            yield try_coerce_native(key), val
+
+    return cls(_parse_pairs())
+
+
+def dump_cookie(
+    key,
+    value="",
+    max_age=None,
+    expires=None,
+    path="/",
+    domain=None,
+    secure=False,
+    httponly=False,
+    charset="utf-8",
+    sync_expires=True,
+    max_size=4093,
+    samesite=None,
+):
+    """Creates a new Set-Cookie header without the ``Set-Cookie`` prefix
+    The parameters are the same as in the cookie Morsel object in the
+    Python standard library but it accepts unicode data, too.
+
+    On Python 3 the return value of this function will be a unicode
+    string, on Python 2 it will be a native string.  In both cases the
+    return value is usually restricted to ascii as the vast majority of
+    values are properly escaped, but that is no guarantee.  If a unicode
+    string is returned it's tunneled through latin1 as required by
+    PEP 3333.
+
+    The return value is not ASCII safe if the key contains unicode
+    characters.  This is technically against the specification but
+    happens in the wild.  It's strongly recommended to not use
+    non-ASCII values for the keys.
+
+    :param max_age: should be a number of seconds, or `None` (default) if
+                    the cookie should last only as long as the client's
+                    browser session.  Additionally `timedelta` objects
+                    are accepted, too.
+    :param expires: should be a `datetime` object or unix timestamp.
+    :param path: limits the cookie to a given path, per default it will
+                 span the whole domain.
+    :param domain: Use this if you want to set a cross-domain cookie. For
+                   example, ``domain=".example.com"`` will set a cookie
+                   that is readable by the domain ``www.example.com``,
+                   ``foo.example.com`` etc. Otherwise, a cookie will only
+                   be readable by the domain that set it.
+    :param secure: The cookie will only be available via HTTPS
+    :param httponly: disallow JavaScript to access the cookie.  This is an
+                     extension to the cookie standard and probably not
+                     supported by all browsers.
+    :param charset: the encoding for unicode values.
+    :param sync_expires: automatically set expires if max_age is defined
+                         but expires not.
+    :param max_size: Warn if the final header value exceeds this size. The
+        default, 4093, should be safely `supported by most browsers
+        <cookie_>`_. Set to 0 to disable this check.
+    :param samesite: Limits the scope of the cookie such that it will
+        only be attached to requests if those requests are same-site.
+
+    .. _`cookie`: http://browsercookielimits.squawky.net/
+
+    .. versionchanged:: 1.0.0
+        The string ``'None'`` is accepted for ``samesite``.
+    """
+    key = to_bytes(key, charset)
+    value = to_bytes(value, charset)
+
+    if path is not None:
+        from .urls import iri_to_uri
+
+        path = iri_to_uri(path, charset)
+    domain = _make_cookie_domain(domain)
+    if isinstance(max_age, timedelta):
+        max_age = (max_age.days * 60 * 60 * 24) + max_age.seconds
+    if expires is not None:
+        if not isinstance(expires, string_types):
+            expires = cookie_date(expires)
+    elif max_age is not None and sync_expires:
+        expires = to_bytes(cookie_date(time() + max_age))
+
+    if samesite is not None:
+        samesite = samesite.title()
+
+        if samesite not in {"Strict", "Lax", "None"}:
+            raise ValueError("SameSite must be 'Strict', 'Lax', or 'None'.")
+
+    buf = [key + b"=" + _cookie_quote(value)]
+
+    # XXX: In theory all of these parameters that are not marked with `None`
+    # should be quoted.  Because stdlib did not quote it before I did not
+    # want to introduce quoting there now.
+    for k, v, q in (
+        (b"Domain", domain, True),
+        (b"Expires", expires, False),
+        (b"Max-Age", max_age, False),
+        (b"Secure", secure, None),
+        (b"HttpOnly", httponly, None),
+        (b"Path", path, False),
+        (b"SameSite", samesite, False),
+    ):
+        if q is None:
+            if v:
+                buf.append(k)
+            continue
+
+        if v is None:
+            continue
+
+        tmp = bytearray(k)
+        if not isinstance(v, (bytes, bytearray)):
+            v = to_bytes(text_type(v), charset)
+        if q:
+            v = _cookie_quote(v)
+        tmp += b"=" + v
+        buf.append(bytes(tmp))
+
+    # The return value will be an incorrectly encoded latin1 header on
+    # Python 3 for consistency with the headers object and a bytestring
+    # on Python 2 because that's how the API makes more sense.
+    rv = b"; ".join(buf)
+    if not PY2:
+        rv = rv.decode("latin1")
+
+    # Warn if the final value of the cookie is larger than the limit. If the
+    # cookie is too large, then it may be silently ignored by the browser,
+    # which can be quite hard to debug.
+    cookie_size = len(rv)
+
+    if max_size and cookie_size > max_size:
+        value_size = len(value)
+        warnings.warn(
+            'The "{key}" cookie is too large: the value was {value_size} bytes'
+            " but the header required {extra_size} extra bytes. The final size"
+            " was {cookie_size} bytes but the limit is {max_size} bytes."
+            " Browsers may silently ignore cookies larger than this.".format(
+                key=key,
+                value_size=value_size,
+                extra_size=cookie_size - value_size,
+                cookie_size=cookie_size,
+                max_size=max_size,
+            ),
+            stacklevel=2,
+        )
+
+    return rv
+
+
+def is_byte_range_valid(start, stop, length):
+    """Checks if a given byte content range is valid for the given length.
+
+    .. versionadded:: 0.7
+    """
+    if (start is None) != (stop is None):
+        return False
+    elif start is None:
+        return length is None or length >= 0
+    elif length is None:
+        return 0 <= start < stop
+    elif start >= stop:
+        return False
+    return 0 <= start < length
+
+
+# circular dependencies
+from .datastructures import Accept
+from .datastructures import Authorization
+from .datastructures import ContentRange
+from .datastructures import ContentSecurityPolicy
+from .datastructures import ETags
+from .datastructures import HeaderSet
+from .datastructures import IfRange
+from .datastructures import MultiDict
+from .datastructures import Range
+from .datastructures import RequestCacheControl
+from .datastructures import WWWAuthenticate
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/local.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/local.py
new file mode 100644
index 0000000..626b87b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/local.py
@@ -0,0 +1,420 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.local
+    ~~~~~~~~~~~~~~
+
+    This module implements context-local objects.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import copy
+from functools import update_wrapper
+
+from ._compat import implements_bool
+from ._compat import PY2
+from .wsgi import ClosingIterator
+
+# since each thread has its own greenlet we can just use those as identifiers
+# for the context.  If greenlets are not available we fall back to the
+# current thread ident depending on where it is.
+try:
+    from greenlet import getcurrent as get_ident
+except ImportError:
+    try:
+        from thread import get_ident
+    except ImportError:
+        from _thread import get_ident
+
+
+def release_local(local):
+    """Releases the contents of the local for the current context.
+    This makes it possible to use locals without a manager.
+
+    Example::
+
+        >>> loc = Local()
+        >>> loc.foo = 42
+        >>> release_local(loc)
+        >>> hasattr(loc, 'foo')
+        False
+
+    With this function one can release :class:`Local` objects as well
+    as :class:`LocalStack` objects.  However it is not possible to
+    release data held by proxies that way, one always has to retain
+    a reference to the underlying local object in order to be able
+    to release it.
+
+    .. versionadded:: 0.6.1
+    """
+    local.__release_local__()
+
+
+class Local(object):
+    __slots__ = ("__storage__", "__ident_func__")
+
+    def __init__(self):
+        object.__setattr__(self, "__storage__", {})
+        object.__setattr__(self, "__ident_func__", get_ident)
+
+    def __iter__(self):
+        return iter(self.__storage__.items())
+
+    def __call__(self, proxy):
+        """Create a proxy for a name."""
+        return LocalProxy(self, proxy)
+
+    def __release_local__(self):
+        self.__storage__.pop(self.__ident_func__(), None)
+
+    def __getattr__(self, name):
+        try:
+            return self.__storage__[self.__ident_func__()][name]
+        except KeyError:
+            raise AttributeError(name)
+
+    def __setattr__(self, name, value):
+        ident = self.__ident_func__()
+        storage = self.__storage__
+        try:
+            storage[ident][name] = value
+        except KeyError:
+            storage[ident] = {name: value}
+
+    def __delattr__(self, name):
+        try:
+            del self.__storage__[self.__ident_func__()][name]
+        except KeyError:
+            raise AttributeError(name)
+
+
+class LocalStack(object):
+    """This class works similar to a :class:`Local` but keeps a stack
+    of objects instead.  This is best explained with an example::
+
+        >>> ls = LocalStack()
+        >>> ls.push(42)
+        >>> ls.top
+        42
+        >>> ls.push(23)
+        >>> ls.top
+        23
+        >>> ls.pop()
+        23
+        >>> ls.top
+        42
+
+    They can be force released by using a :class:`LocalManager` or with
+    the :func:`release_local` function but the correct way is to pop the
+    item from the stack after using.  When the stack is empty it will
+    no longer be bound to the current context (and as such released).
+
+    By calling the stack without arguments it returns a proxy that resolves to
+    the topmost item on the stack.
+
+    .. versionadded:: 0.6.1
+    """
+
+    def __init__(self):
+        self._local = Local()
+
+    def __release_local__(self):
+        self._local.__release_local__()
+
+    @property
+    def __ident_func__(self):
+        return self._local.__ident_func__
+
+    @__ident_func__.setter
+    def __ident_func__(self, value):
+        object.__setattr__(self._local, "__ident_func__", value)
+
+    def __call__(self):
+        def _lookup():
+            rv = self.top
+            if rv is None:
+                raise RuntimeError("object unbound")
+            return rv
+
+        return LocalProxy(_lookup)
+
+    def push(self, obj):
+        """Pushes a new item to the stack"""
+        rv = getattr(self._local, "stack", None)
+        if rv is None:
+            self._local.stack = rv = []
+        rv.append(obj)
+        return rv
+
+    def pop(self):
+        """Removes the topmost item from the stack, will return the
+        old value or `None` if the stack was already empty.
+        """
+        stack = getattr(self._local, "stack", None)
+        if stack is None:
+            return None
+        elif len(stack) == 1:
+            release_local(self._local)
+            return stack[-1]
+        else:
+            return stack.pop()
+
+    @property
+    def top(self):
+        """The topmost item on the stack.  If the stack is empty,
+        `None` is returned.
+        """
+        try:
+            return self._local.stack[-1]
+        except (AttributeError, IndexError):
+            return None
+
+
+class LocalManager(object):
+    """Local objects cannot manage themselves. For that you need a local
+    manager.  You can pass a local manager multiple locals or add them later
+    by appending them to `manager.locals`.  Every time the manager cleans up,
+    it will clean up all the data left in the locals for this context.
+
+    The `ident_func` parameter can be added to override the default ident
+    function for the wrapped locals.
+
+    .. versionchanged:: 0.6.1
+       Instead of a manager the :func:`release_local` function can be used
+       as well.
+
+    .. versionchanged:: 0.7
+       `ident_func` was added.
+    """
+
+    def __init__(self, locals=None, ident_func=None):
+        if locals is None:
+            self.locals = []
+        elif isinstance(locals, Local):
+            self.locals = [locals]
+        else:
+            self.locals = list(locals)
+        if ident_func is not None:
+            self.ident_func = ident_func
+            for local in self.locals:
+                object.__setattr__(local, "__ident_func__", ident_func)
+        else:
+            self.ident_func = get_ident
+
+    def get_ident(self):
+        """Return the context identifier the local objects use internally for
+        this context.  You cannot override this method to change the behavior
+        but use it to link other context local objects (such as SQLAlchemy's
+        scoped sessions) to the Werkzeug locals.
+
+        .. versionchanged:: 0.7
+           You can pass a different ident function to the local manager that
+           will then be propagated to all the locals passed to the
+           constructor.
+        """
+        return self.ident_func()
+
+    def cleanup(self):
+        """Manually clean up the data in the locals for this context.  Call
+        this at the end of the request or use `make_middleware()`.
+        """
+        for local in self.locals:
+            release_local(local)
+
+    def make_middleware(self, app):
+        """Wrap a WSGI application so that cleaning up happens after
+        request end.
+        """
+
+        def application(environ, start_response):
+            return ClosingIterator(app(environ, start_response), self.cleanup)
+
+        return application
+
+    def middleware(self, func):
+        """Like `make_middleware` but for decorating functions.
+
+        Example usage::
+
+            @manager.middleware
+            def application(environ, start_response):
+                ...
+
+        The difference to `make_middleware` is that the function passed
+        will have all the arguments copied from the inner application
+        (name, docstring, module).
+        """
+        return update_wrapper(self.make_middleware(func), func)
+
+    def __repr__(self):
+        return "<%s storages: %d>" % (self.__class__.__name__, len(self.locals))
+
+
+@implements_bool
+class LocalProxy(object):
+    """Acts as a proxy for a werkzeug local.  Forwards all operations to
+    a proxied object.  The only operations not supported for forwarding
+    are right handed operands and any kind of assignment.
+
+    Example usage::
+
+        from werkzeug.local import Local
+        l = Local()
+
+        # these are proxies
+        request = l('request')
+        user = l('user')
+
+
+        from werkzeug.local import LocalStack
+        _response_local = LocalStack()
+
+        # this is a proxy
+        response = _response_local()
+
+    Whenever something is bound to l.user / l.request the proxy objects
+    will forward all operations.  If no object is bound a :exc:`RuntimeError`
+    will be raised.
+
+    To create proxies to :class:`Local` or :class:`LocalStack` objects,
+    call the object as shown above.  If you want to have a proxy to an
+    object looked up by a function, you can (as of Werkzeug 0.6.1) pass
+    a function to the :class:`LocalProxy` constructor::
+
+        session = LocalProxy(lambda: get_current_request().session)
+
+    .. versionchanged:: 0.6.1
+       The class can be instantiated with a callable as well now.
+    """
+
+    __slots__ = ("__local", "__dict__", "__name__", "__wrapped__")
+
+    def __init__(self, local, name=None):
+        object.__setattr__(self, "_LocalProxy__local", local)
+        object.__setattr__(self, "__name__", name)
+        if callable(local) and not hasattr(local, "__release_local__"):
+            # "local" is a callable that is not an instance of Local or
+            # LocalManager: mark it as a wrapped function.
+            object.__setattr__(self, "__wrapped__", local)
+
+    def _get_current_object(self):
+        """Return the current object.  This is useful if you want the real
+        object behind the proxy at a time for performance reasons or because
+        you want to pass the object into a different context.
+        """
+        if not hasattr(self.__local, "__release_local__"):
+            return self.__local()
+        try:
+            return getattr(self.__local, self.__name__)
+        except AttributeError:
+            raise RuntimeError("no object bound to %s" % self.__name__)
+
+    @property
+    def __dict__(self):
+        try:
+            return self._get_current_object().__dict__
+        except RuntimeError:
+            raise AttributeError("__dict__")
+
+    def __repr__(self):
+        try:
+            obj = self._get_current_object()
+        except RuntimeError:
+            return "<%s unbound>" % self.__class__.__name__
+        return repr(obj)
+
+    def __bool__(self):
+        try:
+            return bool(self._get_current_object())
+        except RuntimeError:
+            return False
+
+    def __unicode__(self):
+        try:
+            return unicode(self._get_current_object())  # noqa
+        except RuntimeError:
+            return repr(self)
+
+    def __dir__(self):
+        try:
+            return dir(self._get_current_object())
+        except RuntimeError:
+            return []
+
+    def __getattr__(self, name):
+        if name == "__members__":
+            return dir(self._get_current_object())
+        return getattr(self._get_current_object(), name)
+
+    def __setitem__(self, key, value):
+        self._get_current_object()[key] = value
+
+    def __delitem__(self, key):
+        del self._get_current_object()[key]
+
+    if PY2:
+        __getslice__ = lambda x, i, j: x._get_current_object()[i:j]
+
+        def __setslice__(self, i, j, seq):
+            self._get_current_object()[i:j] = seq
+
+        def __delslice__(self, i, j):
+            del self._get_current_object()[i:j]
+
+    __setattr__ = lambda x, n, v: setattr(x._get_current_object(), n, v)
+    __delattr__ = lambda x, n: delattr(x._get_current_object(), n)
+    __str__ = lambda x: str(x._get_current_object())
+    __lt__ = lambda x, o: x._get_current_object() < o
+    __le__ = lambda x, o: x._get_current_object() <= o
+    __eq__ = lambda x, o: x._get_current_object() == o
+    __ne__ = lambda x, o: x._get_current_object() != o
+    __gt__ = lambda x, o: x._get_current_object() > o
+    __ge__ = lambda x, o: x._get_current_object() >= o
+    __cmp__ = lambda x, o: cmp(x._get_current_object(), o)  # noqa
+    __hash__ = lambda x: hash(x._get_current_object())
+    __call__ = lambda x, *a, **kw: x._get_current_object()(*a, **kw)
+    __len__ = lambda x: len(x._get_current_object())
+    __getitem__ = lambda x, i: x._get_current_object()[i]
+    __iter__ = lambda x: iter(x._get_current_object())
+    __contains__ = lambda x, i: i in x._get_current_object()
+    __add__ = lambda x, o: x._get_current_object() + o
+    __sub__ = lambda x, o: x._get_current_object() - o
+    __mul__ = lambda x, o: x._get_current_object() * o
+    __floordiv__ = lambda x, o: x._get_current_object() // o
+    __mod__ = lambda x, o: x._get_current_object() % o
+    __divmod__ = lambda x, o: x._get_current_object().__divmod__(o)
+    __pow__ = lambda x, o: x._get_current_object() ** o
+    __lshift__ = lambda x, o: x._get_current_object() << o
+    __rshift__ = lambda x, o: x._get_current_object() >> o
+    __and__ = lambda x, o: x._get_current_object() & o
+    __xor__ = lambda x, o: x._get_current_object() ^ o
+    __or__ = lambda x, o: x._get_current_object() | o
+    __div__ = lambda x, o: x._get_current_object().__div__(o)
+    __truediv__ = lambda x, o: x._get_current_object().__truediv__(o)
+    __neg__ = lambda x: -(x._get_current_object())
+    __pos__ = lambda x: +(x._get_current_object())
+    __abs__ = lambda x: abs(x._get_current_object())
+    __invert__ = lambda x: ~(x._get_current_object())
+    __complex__ = lambda x: complex(x._get_current_object())
+    __int__ = lambda x: int(x._get_current_object())
+    __long__ = lambda x: long(x._get_current_object())  # noqa
+    __float__ = lambda x: float(x._get_current_object())
+    __oct__ = lambda x: oct(x._get_current_object())
+    __hex__ = lambda x: hex(x._get_current_object())
+    __index__ = lambda x: x._get_current_object().__index__()
+    __coerce__ = lambda x, o: x._get_current_object().__coerce__(x, o)
+    __enter__ = lambda x: x._get_current_object().__enter__()
+    __exit__ = lambda x, *a, **kw: x._get_current_object().__exit__(*a, **kw)
+    __radd__ = lambda x, o: o + x._get_current_object()
+    __rsub__ = lambda x, o: o - x._get_current_object()
+    __rmul__ = lambda x, o: o * x._get_current_object()
+    __rdiv__ = lambda x, o: o / x._get_current_object()
+    if PY2:
+        __rtruediv__ = lambda x, o: x._get_current_object().__rtruediv__(o)
+    else:
+        __rtruediv__ = __rdiv__
+    __rfloordiv__ = lambda x, o: o // x._get_current_object()
+    __rmod__ = lambda x, o: o % x._get_current_object()
+    __rdivmod__ = lambda x, o: x._get_current_object().__rdivmod__(o)
+    __copy__ = lambda x: copy.copy(x._get_current_object())
+    __deepcopy__ = lambda x, memo: copy.deepcopy(x._get_current_object(), memo)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/__init__.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/__init__.py
new file mode 100644
index 0000000..5e049f5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/__init__.py
@@ -0,0 +1,25 @@
+"""
+Middleware
+==========
+
+A WSGI middleware is a WSGI application that wraps another application
+in order to observe or change its behavior. Werkzeug provides some
+middleware for common use cases.
+
+.. toctree::
+    :maxdepth: 1
+
+    proxy_fix
+    shared_data
+    dispatcher
+    http_proxy
+    lint
+    profiler
+
+The :doc:`interactive debugger </debug>` is also a middleware that can
+be applied manually, although it is typically used automatically with
+the :doc:`development server </serving>`.
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
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diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/dispatcher.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/dispatcher.py
new file mode 100644
index 0000000..2eb173e
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/dispatcher.py
@@ -0,0 +1,66 @@
+"""
+Application Dispatcher
+======================
+
+This middleware creates a single WSGI application that dispatches to
+multiple other WSGI applications mounted at different URL paths.
+
+A common example is writing a Single Page Application, where you have a
+backend API and a frontend written in JavaScript that does the routing
+in the browser rather than requesting different pages from the server.
+The frontend is a single HTML and JS file that should be served for any
+path besides "/api".
+
+This example dispatches to an API app under "/api", an admin app
+under "/admin", and an app that serves frontend files for all other
+requests::
+
+    app = DispatcherMiddleware(serve_frontend, {
+        '/api': api_app,
+        '/admin': admin_app,
+    })
+
+In production, you might instead handle this at the HTTP server level,
+serving files or proxying to application servers based on location. The
+API and admin apps would each be deployed with a separate WSGI server,
+and the static files would be served directly by the HTTP server.
+
+.. autoclass:: DispatcherMiddleware
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+
+
+class DispatcherMiddleware(object):
+    """Combine multiple applications as a single WSGI application.
+    Requests are dispatched to an application based on the path it is
+    mounted under.
+
+    :param app: The WSGI application to dispatch to if the request
+        doesn't match a mounted path.
+    :param mounts: Maps path prefixes to applications for dispatching.
+    """
+
+    def __init__(self, app, mounts=None):
+        self.app = app
+        self.mounts = mounts or {}
+
+    def __call__(self, environ, start_response):
+        script = environ.get("PATH_INFO", "")
+        path_info = ""
+
+        while "/" in script:
+            if script in self.mounts:
+                app = self.mounts[script]
+                break
+
+            script, last_item = script.rsplit("/", 1)
+            path_info = "/%s%s" % (last_item, path_info)
+        else:
+            app = self.mounts.get(script, self.app)
+
+        original_script_name = environ.get("SCRIPT_NAME", "")
+        environ["SCRIPT_NAME"] = original_script_name + script
+        environ["PATH_INFO"] = path_info
+        return app(environ, start_response)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/http_proxy.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/http_proxy.py
new file mode 100644
index 0000000..bfdc071
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/http_proxy.py
@@ -0,0 +1,219 @@
+"""
+Basic HTTP Proxy
+================
+
+.. autoclass:: ProxyMiddleware
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+import socket
+
+from ..datastructures import EnvironHeaders
+from ..http import is_hop_by_hop_header
+from ..urls import url_parse
+from ..urls import url_quote
+from ..wsgi import get_input_stream
+
+try:
+    from http import client
+except ImportError:
+    import httplib as client
+
+
+class ProxyMiddleware(object):
+    """Proxy requests under a path to an external server, routing other
+    requests to the app.
+
+    This middleware can only proxy HTTP requests, as that is the only
+    protocol handled by the WSGI server. Other protocols, such as
+    websocket requests, cannot be proxied at this layer. This should
+    only be used for development, in production a real proxying server
+    should be used.
+
+    The middleware takes a dict that maps a path prefix to a dict
+    describing the host to be proxied to::
+
+        app = ProxyMiddleware(app, {
+            "/static/": {
+                "target": "http://127.0.0.1:5001/",
+            }
+        })
+
+    Each host has the following options:
+
+    ``target``:
+        The target URL to dispatch to. This is required.
+    ``remove_prefix``:
+        Whether to remove the prefix from the URL before dispatching it
+        to the target. The default is ``False``.
+    ``host``:
+        ``"<auto>"`` (default):
+            The host header is automatically rewritten to the URL of the
+            target.
+        ``None``:
+            The host header is unmodified from the client request.
+        Any other value:
+            The host header is overwritten with the value.
+    ``headers``:
+        A dictionary of headers to be sent with the request to the
+        target. The default is ``{}``.
+    ``ssl_context``:
+        A :class:`ssl.SSLContext` defining how to verify requests if the
+        target is HTTPS. The default is ``None``.
+
+    In the example above, everything under ``"/static/"`` is proxied to
+    the server on port 5001. The host header is rewritten to the target,
+    and the ``"/static/"`` prefix is removed from the URLs.
+
+    :param app: The WSGI application to wrap.
+    :param targets: Proxy target configurations. See description above.
+    :param chunk_size: Size of chunks to read from input stream and
+        write to target.
+    :param timeout: Seconds before an operation to a target fails.
+
+    .. versionadded:: 0.14
+    """
+
+    def __init__(self, app, targets, chunk_size=2 << 13, timeout=10):
+        def _set_defaults(opts):
+            opts.setdefault("remove_prefix", False)
+            opts.setdefault("host", "<auto>")
+            opts.setdefault("headers", {})
+            opts.setdefault("ssl_context", None)
+            return opts
+
+        self.app = app
+        self.targets = dict(
+            ("/%s/" % k.strip("/"), _set_defaults(v)) for k, v in targets.items()
+        )
+        self.chunk_size = chunk_size
+        self.timeout = timeout
+
+    def proxy_to(self, opts, path, prefix):
+        target = url_parse(opts["target"])
+
+        def application(environ, start_response):
+            headers = list(EnvironHeaders(environ).items())
+            headers[:] = [
+                (k, v)
+                for k, v in headers
+                if not is_hop_by_hop_header(k)
+                and k.lower() not in ("content-length", "host")
+            ]
+            headers.append(("Connection", "close"))
+
+            if opts["host"] == "<auto>":
+                headers.append(("Host", target.ascii_host))
+            elif opts["host"] is None:
+                headers.append(("Host", environ["HTTP_HOST"]))
+            else:
+                headers.append(("Host", opts["host"]))
+
+            headers.extend(opts["headers"].items())
+            remote_path = path
+
+            if opts["remove_prefix"]:
+                remote_path = "%s/%s" % (
+                    target.path.rstrip("/"),
+                    remote_path[len(prefix) :].lstrip("/"),
+                )
+
+            content_length = environ.get("CONTENT_LENGTH")
+            chunked = False
+
+            if content_length not in ("", None):
+                headers.append(("Content-Length", content_length))
+            elif content_length is not None:
+                headers.append(("Transfer-Encoding", "chunked"))
+                chunked = True
+
+            try:
+                if target.scheme == "http":
+                    con = client.HTTPConnection(
+                        target.ascii_host, target.port or 80, timeout=self.timeout
+                    )
+                elif target.scheme == "https":
+                    con = client.HTTPSConnection(
+                        target.ascii_host,
+                        target.port or 443,
+                        timeout=self.timeout,
+                        context=opts["ssl_context"],
+                    )
+                else:
+                    raise RuntimeError(
+                        "Target scheme must be 'http' or 'https', got '{}'.".format(
+                            target.scheme
+                        )
+                    )
+
+                con.connect()
+                remote_url = url_quote(remote_path)
+                querystring = environ["QUERY_STRING"]
+
+                if querystring:
+                    remote_url = remote_url + "?" + querystring
+
+                con.putrequest(environ["REQUEST_METHOD"], remote_url, skip_host=True)
+
+                for k, v in headers:
+                    if k.lower() == "connection":
+                        v = "close"
+
+                    con.putheader(k, v)
+
+                con.endheaders()
+                stream = get_input_stream(environ)
+
+                while 1:
+                    data = stream.read(self.chunk_size)
+
+                    if not data:
+                        break
+
+                    if chunked:
+                        con.send(b"%x\r\n%s\r\n" % (len(data), data))
+                    else:
+                        con.send(data)
+
+                resp = con.getresponse()
+            except socket.error:
+                from ..exceptions import BadGateway
+
+                return BadGateway()(environ, start_response)
+
+            start_response(
+                "%d %s" % (resp.status, resp.reason),
+                [
+                    (k.title(), v)
+                    for k, v in resp.getheaders()
+                    if not is_hop_by_hop_header(k)
+                ],
+            )
+
+            def read():
+                while 1:
+                    try:
+                        data = resp.read(self.chunk_size)
+                    except socket.error:
+                        break
+
+                    if not data:
+                        break
+
+                    yield data
+
+            return read()
+
+        return application
+
+    def __call__(self, environ, start_response):
+        path = environ["PATH_INFO"]
+        app = self.app
+
+        for prefix, opts in self.targets.items():
+            if path.startswith(prefix):
+                app = self.proxy_to(opts, path, prefix)
+                break
+
+        return app(environ, start_response)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/lint.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/lint.py
new file mode 100644
index 0000000..98f9581
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/lint.py
@@ -0,0 +1,408 @@
+"""
+WSGI Protocol Linter
+====================
+
+This module provides a middleware that performs sanity checks on the
+behavior of the WSGI server and application. It checks that the
+:pep:`3333` WSGI spec is properly implemented. It also warns on some
+common HTTP errors such as non-empty responses for 304 status codes.
+
+.. autoclass:: LintMiddleware
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+from warnings import warn
+
+from .._compat import implements_iterator
+from .._compat import PY2
+from .._compat import string_types
+from ..datastructures import Headers
+from ..http import is_entity_header
+from ..wsgi import FileWrapper
+
+try:
+    from urllib.parse import urlparse
+except ImportError:
+    from urlparse import urlparse
+
+
+class WSGIWarning(Warning):
+    """Warning class for WSGI warnings."""
+
+
+class HTTPWarning(Warning):
+    """Warning class for HTTP warnings."""
+
+
+def check_string(context, obj, stacklevel=3):
+    if type(obj) is not str:
+        warn(
+            "'%s' requires strings, got '%s'" % (context, type(obj).__name__),
+            WSGIWarning,
+        )
+
+
+class InputStream(object):
+    def __init__(self, stream):
+        self._stream = stream
+
+    def read(self, *args):
+        if len(args) == 0:
+            warn(
+                "WSGI does not guarantee an EOF marker on the input stream, thus making"
+                " calls to 'wsgi.input.read()' unsafe. Conforming servers may never"
+                " return from this call.",
+                WSGIWarning,
+                stacklevel=2,
+            )
+        elif len(args) != 1:
+            warn(
+                "Too many parameters passed to 'wsgi.input.read()'.",
+                WSGIWarning,
+                stacklevel=2,
+            )
+        return self._stream.read(*args)
+
+    def readline(self, *args):
+        if len(args) == 0:
+            warn(
+                "Calls to 'wsgi.input.readline()' without arguments are unsafe. Use"
+                " 'wsgi.input.read()' instead.",
+                WSGIWarning,
+                stacklevel=2,
+            )
+        elif len(args) == 1:
+            warn(
+                "'wsgi.input.readline()' was called with a size hint. WSGI does not"
+                " support this, although it's available on all major servers.",
+                WSGIWarning,
+                stacklevel=2,
+            )
+        else:
+            raise TypeError("Too many arguments passed to 'wsgi.input.readline()'.")
+        return self._stream.readline(*args)
+
+    def __iter__(self):
+        try:
+            return iter(self._stream)
+        except TypeError:
+            warn("'wsgi.input' is not iterable.", WSGIWarning, stacklevel=2)
+            return iter(())
+
+    def close(self):
+        warn("The application closed the input stream!", WSGIWarning, stacklevel=2)
+        self._stream.close()
+
+
+class ErrorStream(object):
+    def __init__(self, stream):
+        self._stream = stream
+
+    def write(self, s):
+        check_string("wsgi.error.write()", s)
+        self._stream.write(s)
+
+    def flush(self):
+        self._stream.flush()
+
+    def writelines(self, seq):
+        for line in seq:
+            self.write(line)
+
+    def close(self):
+        warn("The application closed the error stream!", WSGIWarning, stacklevel=2)
+        self._stream.close()
+
+
+class GuardedWrite(object):
+    def __init__(self, write, chunks):
+        self._write = write
+        self._chunks = chunks
+
+    def __call__(self, s):
+        check_string("write()", s)
+        self._write.write(s)
+        self._chunks.append(len(s))
+
+
+@implements_iterator
+class GuardedIterator(object):
+    def __init__(self, iterator, headers_set, chunks):
+        self._iterator = iterator
+        if PY2:
+            self._next = iter(iterator).next
+        else:
+            self._next = iter(iterator).__next__
+        self.closed = False
+        self.headers_set = headers_set
+        self.chunks = chunks
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        if self.closed:
+            warn("Iterated over closed 'app_iter'.", WSGIWarning, stacklevel=2)
+
+        rv = self._next()
+
+        if not self.headers_set:
+            warn(
+                "The application returned before it started the response.",
+                WSGIWarning,
+                stacklevel=2,
+            )
+
+        check_string("application iterator items", rv)
+        self.chunks.append(len(rv))
+        return rv
+
+    def close(self):
+        self.closed = True
+
+        if hasattr(self._iterator, "close"):
+            self._iterator.close()
+
+        if self.headers_set:
+            status_code, headers = self.headers_set
+            bytes_sent = sum(self.chunks)
+            content_length = headers.get("content-length", type=int)
+
+            if status_code == 304:
+                for key, _value in headers:
+                    key = key.lower()
+                    if key not in ("expires", "content-location") and is_entity_header(
+                        key
+                    ):
+                        warn(
+                            "Entity header %r found in 304 response." % key, HTTPWarning
+                        )
+                if bytes_sent:
+                    warn("304 responses must not have a body.", HTTPWarning)
+            elif 100 <= status_code < 200 or status_code == 204:
+                if content_length != 0:
+                    warn(
+                        "%r responses must have an empty content length." % status_code,
+                        HTTPWarning,
+                    )
+                if bytes_sent:
+                    warn(
+                        "%r responses must not have a body." % status_code, HTTPWarning
+                    )
+            elif content_length is not None and content_length != bytes_sent:
+                warn(
+                    "Content-Length and the number of bytes sent to the client do not"
+                    " match.",
+                    WSGIWarning,
+                )
+
+    def __del__(self):
+        if not self.closed:
+            try:
+                warn(
+                    "Iterator was garbage collected before it was closed.", WSGIWarning
+                )
+            except Exception:
+                pass
+
+
+class LintMiddleware(object):
+    """Warns about common errors in the WSGI and HTTP behavior of the
+    server and wrapped application. Some of the issues it check are:
+
+    -   invalid status codes
+    -   non-bytestrings sent to the WSGI server
+    -   strings returned from the WSGI application
+    -   non-empty conditional responses
+    -   unquoted etags
+    -   relative URLs in the Location header
+    -   unsafe calls to wsgi.input
+    -   unclosed iterators
+
+    Error information is emitted using the :mod:`warnings` module.
+
+    :param app: The WSGI application to wrap.
+
+    .. code-block:: python
+
+        from werkzeug.middleware.lint import LintMiddleware
+        app = LintMiddleware(app)
+    """
+
+    def __init__(self, app):
+        self.app = app
+
+    def check_environ(self, environ):
+        if type(environ) is not dict:
+            warn(
+                "WSGI environment is not a standard Python dict.",
+                WSGIWarning,
+                stacklevel=4,
+            )
+        for key in (
+            "REQUEST_METHOD",
+            "SERVER_NAME",
+            "SERVER_PORT",
+            "wsgi.version",
+            "wsgi.input",
+            "wsgi.errors",
+            "wsgi.multithread",
+            "wsgi.multiprocess",
+            "wsgi.run_once",
+        ):
+            if key not in environ:
+                warn(
+                    "Required environment key %r not found" % key,
+                    WSGIWarning,
+                    stacklevel=3,
+                )
+        if environ["wsgi.version"] != (1, 0):
+            warn("Environ is not a WSGI 1.0 environ.", WSGIWarning, stacklevel=3)
+
+        script_name = environ.get("SCRIPT_NAME", "")
+        path_info = environ.get("PATH_INFO", "")
+
+        if script_name and script_name[0] != "/":
+            warn(
+                "'SCRIPT_NAME' does not start with a slash: %r" % script_name,
+                WSGIWarning,
+                stacklevel=3,
+            )
+
+        if path_info and path_info[0] != "/":
+            warn(
+                "'PATH_INFO' does not start with a slash: %r" % path_info,
+                WSGIWarning,
+                stacklevel=3,
+            )
+
+    def check_start_response(self, status, headers, exc_info):
+        check_string("status", status)
+        status_code = status.split(None, 1)[0]
+
+        if len(status_code) != 3 or not status_code.isdigit():
+            warn(WSGIWarning("Status code must be three digits"), stacklevel=3)
+
+        if len(status) < 4 or status[3] != " ":
+            warn(
+                WSGIWarning(
+                    "Invalid value for status %r.  Valid "
+                    "status strings are three digits, a space "
+                    "and a status explanation"
+                ),
+                stacklevel=3,
+            )
+
+        status_code = int(status_code)
+
+        if status_code < 100:
+            warn(WSGIWarning("status code < 100 detected"), stacklevel=3)
+
+        if type(headers) is not list:
+            warn(WSGIWarning("header list is not a list"), stacklevel=3)
+
+        for item in headers:
+            if type(item) is not tuple or len(item) != 2:
+                warn(WSGIWarning("Headers must tuple 2-item tuples"), stacklevel=3)
+            name, value = item
+            if type(name) is not str or type(value) is not str:
+                warn(WSGIWarning("header items must be strings"), stacklevel=3)
+            if name.lower() == "status":
+                warn(
+                    WSGIWarning(
+                        "The status header is not supported due to "
+                        "conflicts with the CGI spec."
+                    ),
+                    stacklevel=3,
+                )
+
+        if exc_info is not None and not isinstance(exc_info, tuple):
+            warn(WSGIWarning("invalid value for exc_info"), stacklevel=3)
+
+        headers = Headers(headers)
+        self.check_headers(headers)
+
+        return status_code, headers
+
+    def check_headers(self, headers):
+        etag = headers.get("etag")
+
+        if etag is not None:
+            if etag.startswith(("W/", "w/")):
+                if etag.startswith("w/"):
+                    warn(
+                        HTTPWarning("weak etag indicator should be upcase."),
+                        stacklevel=4,
+                    )
+
+                etag = etag[2:]
+
+            if not (etag[:1] == etag[-1:] == '"'):
+                warn(HTTPWarning("unquoted etag emitted."), stacklevel=4)
+
+        location = headers.get("location")
+
+        if location is not None:
+            if not urlparse(location).netloc:
+                warn(
+                    HTTPWarning("absolute URLs required for location header"),
+                    stacklevel=4,
+                )
+
+    def check_iterator(self, app_iter):
+        if isinstance(app_iter, string_types):
+            warn(
+                "The application returned astring. The response will send one character"
+                " at a time to the client, which will kill performance. Return a list"
+                " or iterable instead.",
+                WSGIWarning,
+                stacklevel=3,
+            )
+
+    def __call__(self, *args, **kwargs):
+        if len(args) != 2:
+            warn("A WSGI app takes two arguments.", WSGIWarning, stacklevel=2)
+
+        if kwargs:
+            warn(
+                "A WSGI app does not take keyword arguments.", WSGIWarning, stacklevel=2
+            )
+
+        environ, start_response = args
+
+        self.check_environ(environ)
+        environ["wsgi.input"] = InputStream(environ["wsgi.input"])
+        environ["wsgi.errors"] = ErrorStream(environ["wsgi.errors"])
+
+        # Hook our own file wrapper in so that applications will always
+        # iterate to the end and we can check the content length.
+        environ["wsgi.file_wrapper"] = FileWrapper
+
+        headers_set = []
+        chunks = []
+
+        def checking_start_response(*args, **kwargs):
+            if len(args) not in (2, 3):
+                warn(
+                    "Invalid number of arguments: %s, expected 2 or 3." % len(args),
+                    WSGIWarning,
+                    stacklevel=2,
+                )
+
+            if kwargs:
+                warn("'start_response' does not take keyword arguments.", WSGIWarning)
+
+            status, headers = args[:2]
+
+            if len(args) == 3:
+                exc_info = args[2]
+            else:
+                exc_info = None
+
+            headers_set[:] = self.check_start_response(status, headers, exc_info)
+            return GuardedWrite(start_response(status, headers, exc_info), chunks)
+
+        app_iter = self.app(environ, checking_start_response)
+        self.check_iterator(app_iter)
+        return GuardedIterator(app_iter, headers_set, chunks)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/profiler.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/profiler.py
new file mode 100644
index 0000000..32a14d9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/profiler.py
@@ -0,0 +1,132 @@
+"""
+Application Profiler
+====================
+
+This module provides a middleware that profiles each request with the
+:mod:`cProfile` module. This can help identify bottlenecks in your code
+that may be slowing down your application.
+
+.. autoclass:: ProfilerMiddleware
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+from __future__ import print_function
+
+import os.path
+import sys
+import time
+from pstats import Stats
+
+try:
+    from cProfile import Profile
+except ImportError:
+    from profile import Profile
+
+
+class ProfilerMiddleware(object):
+    """Wrap a WSGI application and profile the execution of each
+    request. Responses are buffered so that timings are more exact.
+
+    If ``stream`` is given, :class:`pstats.Stats` are written to it
+    after each request. If ``profile_dir`` is given, :mod:`cProfile`
+    data files are saved to that directory, one file per request.
+
+    The filename can be customized by passing ``filename_format``. If
+    it is a string, it will be formatted using :meth:`str.format` with
+    the following fields available:
+
+    -   ``{method}`` - The request method; GET, POST, etc.
+    -   ``{path}`` - The request path or 'root' should one not exist.
+    -   ``{elapsed}`` - The elapsed time of the request.
+    -   ``{time}`` - The time of the request.
+
+    If it is a callable, it will be called with the WSGI ``environ``
+    dict and should return a filename.
+
+    :param app: The WSGI application to wrap.
+    :param stream: Write stats to this stream. Disable with ``None``.
+    :param sort_by: A tuple of columns to sort stats by. See
+        :meth:`pstats.Stats.sort_stats`.
+    :param restrictions: A tuple of restrictions to filter stats by. See
+        :meth:`pstats.Stats.print_stats`.
+    :param profile_dir: Save profile data files to this directory.
+    :param filename_format: Format string for profile data file names,
+        or a callable returning a name. See explanation above.
+
+    .. code-block:: python
+
+        from werkzeug.middleware.profiler import ProfilerMiddleware
+        app = ProfilerMiddleware(app)
+
+    .. versionchanged:: 0.15
+        Stats are written even if ``profile_dir`` is given, and can be
+        disable by passing ``stream=None``.
+
+    .. versionadded:: 0.15
+        Added ``filename_format``.
+
+    .. versionadded:: 0.9
+        Added ``restrictions`` and ``profile_dir``.
+    """
+
+    def __init__(
+        self,
+        app,
+        stream=sys.stdout,
+        sort_by=("time", "calls"),
+        restrictions=(),
+        profile_dir=None,
+        filename_format="{method}.{path}.{elapsed:.0f}ms.{time:.0f}.prof",
+    ):
+        self._app = app
+        self._stream = stream
+        self._sort_by = sort_by
+        self._restrictions = restrictions
+        self._profile_dir = profile_dir
+        self._filename_format = filename_format
+
+    def __call__(self, environ, start_response):
+        response_body = []
+
+        def catching_start_response(status, headers, exc_info=None):
+            start_response(status, headers, exc_info)
+            return response_body.append
+
+        def runapp():
+            app_iter = self._app(environ, catching_start_response)
+            response_body.extend(app_iter)
+
+            if hasattr(app_iter, "close"):
+                app_iter.close()
+
+        profile = Profile()
+        start = time.time()
+        profile.runcall(runapp)
+        body = b"".join(response_body)
+        elapsed = time.time() - start
+
+        if self._profile_dir is not None:
+            if callable(self._filename_format):
+                filename = self._filename_format(environ)
+            else:
+                filename = self._filename_format.format(
+                    method=environ["REQUEST_METHOD"],
+                    path=(
+                        environ.get("PATH_INFO").strip("/").replace("/", ".") or "root"
+                    ),
+                    elapsed=elapsed * 1000.0,
+                    time=time.time(),
+                )
+            filename = os.path.join(self._profile_dir, filename)
+            profile.dump_stats(filename)
+
+        if self._stream is not None:
+            stats = Stats(profile, stream=self._stream)
+            stats.sort_stats(*self._sort_by)
+            print("-" * 80, file=self._stream)
+            print("PATH: {!r}".format(environ.get("PATH_INFO", "")), file=self._stream)
+            stats.print_stats(*self._restrictions)
+            print("-" * 80 + "\n", file=self._stream)
+
+        return [body]
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/proxy_fix.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/proxy_fix.py
new file mode 100644
index 0000000..f393f61
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/proxy_fix.py
@@ -0,0 +1,169 @@
+"""
+X-Forwarded-For Proxy Fix
+=========================
+
+This module provides a middleware that adjusts the WSGI environ based on
+``X-Forwarded-`` headers that proxies in front of an application may
+set.
+
+When an application is running behind a proxy server, WSGI may see the
+request as coming from that server rather than the real client. Proxies
+set various headers to track where the request actually came from.
+
+This middleware should only be applied if the application is actually
+behind such a proxy, and should be configured with the number of proxies
+that are chained in front of it. Not all proxies set all the headers.
+Since incoming headers can be faked, you must set how many proxies are
+setting each header so the middleware knows what to trust.
+
+.. autoclass:: ProxyFix
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+from werkzeug.http import parse_list_header
+
+
+class ProxyFix(object):
+    """Adjust the WSGI environ based on ``X-Forwarded-`` that proxies in
+    front of the application may set.
+
+    -   ``X-Forwarded-For`` sets ``REMOTE_ADDR``.
+    -   ``X-Forwarded-Proto`` sets ``wsgi.url_scheme``.
+    -   ``X-Forwarded-Host`` sets ``HTTP_HOST``, ``SERVER_NAME``, and
+        ``SERVER_PORT``.
+    -   ``X-Forwarded-Port`` sets ``HTTP_HOST`` and ``SERVER_PORT``.
+    -   ``X-Forwarded-Prefix`` sets ``SCRIPT_NAME``.
+
+    You must tell the middleware how many proxies set each header so it
+    knows what values to trust. It is a security issue to trust values
+    that came from the client rather than a proxy.
+
+    The original values of the headers are stored in the WSGI
+    environ as ``werkzeug.proxy_fix.orig``, a dict.
+
+    :param app: The WSGI application to wrap.
+    :param x_for: Number of values to trust for ``X-Forwarded-For``.
+    :param x_proto: Number of values to trust for ``X-Forwarded-Proto``.
+    :param x_host: Number of values to trust for ``X-Forwarded-Host``.
+    :param x_port: Number of values to trust for ``X-Forwarded-Port``.
+    :param x_prefix: Number of values to trust for
+        ``X-Forwarded-Prefix``.
+
+    .. code-block:: python
+
+        from werkzeug.middleware.proxy_fix import ProxyFix
+        # App is behind one proxy that sets the -For and -Host headers.
+        app = ProxyFix(app, x_for=1, x_host=1)
+
+    .. versionchanged:: 1.0
+        Deprecated code has been removed:
+
+        *   The ``num_proxies`` argument and attribute.
+        *   The ``get_remote_addr`` method.
+        *   The environ keys ``orig_remote_addr``,
+            ``orig_wsgi_url_scheme``, and ``orig_http_host``.
+
+    .. versionchanged:: 0.15
+        All headers support multiple values. The ``num_proxies``
+        argument is deprecated. Each header is configured with a
+        separate number of trusted proxies.
+
+    .. versionchanged:: 0.15
+        Original WSGI environ values are stored in the
+        ``werkzeug.proxy_fix.orig`` dict. ``orig_remote_addr``,
+        ``orig_wsgi_url_scheme``, and ``orig_http_host`` are deprecated
+        and will be removed in 1.0.
+
+    .. versionchanged:: 0.15
+        Support ``X-Forwarded-Port`` and ``X-Forwarded-Prefix``.
+
+    .. versionchanged:: 0.15
+        ``X-Forwarded-Host`` and ``X-Forwarded-Port`` modify
+        ``SERVER_NAME`` and ``SERVER_PORT``.
+    """
+
+    def __init__(self, app, x_for=1, x_proto=1, x_host=0, x_port=0, x_prefix=0):
+        self.app = app
+        self.x_for = x_for
+        self.x_proto = x_proto
+        self.x_host = x_host
+        self.x_port = x_port
+        self.x_prefix = x_prefix
+
+    def _get_real_value(self, trusted, value):
+        """Get the real value from a list header based on the configured
+        number of trusted proxies.
+
+        :param trusted: Number of values to trust in the header.
+        :param value: Comma separated list header value to parse.
+        :return: The real value, or ``None`` if there are fewer values
+            than the number of trusted proxies.
+
+        .. versionchanged:: 1.0
+            Renamed from ``_get_trusted_comma``.
+
+        .. versionadded:: 0.15
+        """
+        if not (trusted and value):
+            return
+        values = parse_list_header(value)
+        if len(values) >= trusted:
+            return values[-trusted]
+
+    def __call__(self, environ, start_response):
+        """Modify the WSGI environ based on the various ``Forwarded``
+        headers before calling the wrapped application. Store the
+        original environ values in ``werkzeug.proxy_fix.orig_{key}``.
+        """
+        environ_get = environ.get
+        orig_remote_addr = environ_get("REMOTE_ADDR")
+        orig_wsgi_url_scheme = environ_get("wsgi.url_scheme")
+        orig_http_host = environ_get("HTTP_HOST")
+        environ.update(
+            {
+                "werkzeug.proxy_fix.orig": {
+                    "REMOTE_ADDR": orig_remote_addr,
+                    "wsgi.url_scheme": orig_wsgi_url_scheme,
+                    "HTTP_HOST": orig_http_host,
+                    "SERVER_NAME": environ_get("SERVER_NAME"),
+                    "SERVER_PORT": environ_get("SERVER_PORT"),
+                    "SCRIPT_NAME": environ_get("SCRIPT_NAME"),
+                }
+            }
+        )
+
+        x_for = self._get_real_value(self.x_for, environ_get("HTTP_X_FORWARDED_FOR"))
+        if x_for:
+            environ["REMOTE_ADDR"] = x_for
+
+        x_proto = self._get_real_value(
+            self.x_proto, environ_get("HTTP_X_FORWARDED_PROTO")
+        )
+        if x_proto:
+            environ["wsgi.url_scheme"] = x_proto
+
+        x_host = self._get_real_value(self.x_host, environ_get("HTTP_X_FORWARDED_HOST"))
+        if x_host:
+            environ["HTTP_HOST"] = x_host
+            parts = x_host.split(":", 1)
+            environ["SERVER_NAME"] = parts[0]
+            if len(parts) == 2:
+                environ["SERVER_PORT"] = parts[1]
+
+        x_port = self._get_real_value(self.x_port, environ_get("HTTP_X_FORWARDED_PORT"))
+        if x_port:
+            host = environ.get("HTTP_HOST")
+            if host:
+                parts = host.split(":", 1)
+                host = parts[0] if len(parts) == 2 else host
+                environ["HTTP_HOST"] = "%s:%s" % (host, x_port)
+            environ["SERVER_PORT"] = x_port
+
+        x_prefix = self._get_real_value(
+            self.x_prefix, environ_get("HTTP_X_FORWARDED_PREFIX")
+        )
+        if x_prefix:
+            environ["SCRIPT_NAME"] = x_prefix
+
+        return self.app(environ, start_response)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/shared_data.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/shared_data.py
new file mode 100644
index 0000000..b6e3764
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/middleware/shared_data.py
@@ -0,0 +1,293 @@
+"""
+Serve Shared Static Files
+=========================
+
+.. autoclass:: SharedDataMiddleware
+    :members: is_allowed
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+import mimetypes
+import os
+import pkgutil
+import posixpath
+from datetime import datetime
+from io import BytesIO
+from time import mktime
+from time import time
+from zlib import adler32
+
+from .._compat import PY2
+from .._compat import string_types
+from ..filesystem import get_filesystem_encoding
+from ..http import http_date
+from ..http import is_resource_modified
+from ..security import safe_join
+from ..utils import get_content_type
+from ..wsgi import get_path_info
+from ..wsgi import wrap_file
+
+
+class SharedDataMiddleware(object):
+
+    """A WSGI middleware that provides static content for development
+    environments or simple server setups. Usage is quite simple::
+
+        import os
+        from werkzeug.middleware.shared_data import SharedDataMiddleware
+
+        app = SharedDataMiddleware(app, {
+            '/static': os.path.join(os.path.dirname(__file__), 'static')
+        })
+
+    The contents of the folder ``./shared`` will now be available on
+    ``http://example.com/shared/``.  This is pretty useful during development
+    because a standalone media server is not required.  One can also mount
+    files on the root folder and still continue to use the application because
+    the shared data middleware forwards all unhandled requests to the
+    application, even if the requests are below one of the shared folders.
+
+    If `pkg_resources` is available you can also tell the middleware to serve
+    files from package data::
+
+        app = SharedDataMiddleware(app, {
+            '/static': ('myapplication', 'static')
+        })
+
+    This will then serve the ``static`` folder in the `myapplication`
+    Python package.
+
+    The optional `disallow` parameter can be a list of :func:`~fnmatch.fnmatch`
+    rules for files that are not accessible from the web.  If `cache` is set to
+    `False` no caching headers are sent.
+
+    Currently the middleware does not support non ASCII filenames.  If the
+    encoding on the file system happens to be the encoding of the URI it may
+    work but this could also be by accident.  We strongly suggest using ASCII
+    only file names for static files.
+
+    The middleware will guess the mimetype using the Python `mimetype`
+    module.  If it's unable to figure out the charset it will fall back
+    to `fallback_mimetype`.
+
+    :param app: the application to wrap.  If you don't want to wrap an
+                application you can pass it :exc:`NotFound`.
+    :param exports: a list or dict of exported files and folders.
+    :param disallow: a list of :func:`~fnmatch.fnmatch` rules.
+    :param cache: enable or disable caching headers.
+    :param cache_timeout: the cache timeout in seconds for the headers.
+    :param fallback_mimetype: The fallback mimetype for unknown files.
+
+    .. versionchanged:: 1.0
+        The default ``fallback_mimetype`` is
+        ``application/octet-stream``. If a filename looks like a text
+        mimetype, the ``utf-8`` charset is added to it.
+
+    .. versionadded:: 0.6
+        Added ``fallback_mimetype``.
+
+    .. versionchanged:: 0.5
+        Added ``cache_timeout``.
+    """
+
+    def __init__(
+        self,
+        app,
+        exports,
+        disallow=None,
+        cache=True,
+        cache_timeout=60 * 60 * 12,
+        fallback_mimetype="application/octet-stream",
+    ):
+        self.app = app
+        self.exports = []
+        self.cache = cache
+        self.cache_timeout = cache_timeout
+
+        if hasattr(exports, "items"):
+            exports = exports.items()
+
+        for key, value in exports:
+            if isinstance(value, tuple):
+                loader = self.get_package_loader(*value)
+            elif isinstance(value, string_types):
+                if os.path.isfile(value):
+                    loader = self.get_file_loader(value)
+                else:
+                    loader = self.get_directory_loader(value)
+            else:
+                raise TypeError("unknown def %r" % value)
+
+            self.exports.append((key, loader))
+
+        if disallow is not None:
+            from fnmatch import fnmatch
+
+            self.is_allowed = lambda x: not fnmatch(x, disallow)
+
+        self.fallback_mimetype = fallback_mimetype
+
+    def is_allowed(self, filename):
+        """Subclasses can override this method to disallow the access to
+        certain files.  However by providing `disallow` in the constructor
+        this method is overwritten.
+        """
+        return True
+
+    def _opener(self, filename):
+        return lambda: (
+            open(filename, "rb"),
+            datetime.utcfromtimestamp(os.path.getmtime(filename)),
+            int(os.path.getsize(filename)),
+        )
+
+    def get_file_loader(self, filename):
+        return lambda x: (os.path.basename(filename), self._opener(filename))
+
+    def get_package_loader(self, package, package_path):
+        loadtime = datetime.utcnow()
+        provider = pkgutil.get_loader(package)
+
+        if hasattr(provider, "get_resource_reader"):
+            # Python 3
+            reader = provider.get_resource_reader(package)
+
+            def loader(path):
+                if path is None:
+                    return None, None
+
+                path = safe_join(package_path, path)
+                basename = posixpath.basename(path)
+
+                try:
+                    resource = reader.open_resource(path)
+                except IOError:
+                    return None, None
+
+                if isinstance(resource, BytesIO):
+                    return (
+                        basename,
+                        lambda: (resource, loadtime, len(resource.getvalue())),
+                    )
+
+                return (
+                    basename,
+                    lambda: (
+                        resource,
+                        datetime.utcfromtimestamp(os.path.getmtime(resource.name)),
+                        os.path.getsize(resource.name),
+                    ),
+                )
+
+        else:
+            # Python 2
+            package_filename = provider.get_filename(package)
+            is_filesystem = os.path.exists(package_filename)
+            root = os.path.join(os.path.dirname(package_filename), package_path)
+
+            def loader(path):
+                if path is None:
+                    return None, None
+
+                path = safe_join(root, path)
+                basename = posixpath.basename(path)
+
+                if is_filesystem:
+                    if not os.path.isfile(path):
+                        return None, None
+
+                    return basename, self._opener(path)
+
+                try:
+                    data = provider.get_data(path)
+                except IOError:
+                    return None, None
+
+                return basename, lambda: (BytesIO(data), loadtime, len(data))
+
+        return loader
+
+    def get_directory_loader(self, directory):
+        def loader(path):
+            if path is not None:
+                path = safe_join(directory, path)
+            else:
+                path = directory
+
+            if os.path.isfile(path):
+                return os.path.basename(path), self._opener(path)
+
+            return None, None
+
+        return loader
+
+    def generate_etag(self, mtime, file_size, real_filename):
+        if not isinstance(real_filename, bytes):
+            real_filename = real_filename.encode(get_filesystem_encoding())
+
+        return "wzsdm-%d-%s-%s" % (
+            mktime(mtime.timetuple()),
+            file_size,
+            adler32(real_filename) & 0xFFFFFFFF,
+        )
+
+    def __call__(self, environ, start_response):
+        path = get_path_info(environ)
+
+        if PY2:
+            path = path.encode(get_filesystem_encoding())
+
+        file_loader = None
+
+        for search_path, loader in self.exports:
+            if search_path == path:
+                real_filename, file_loader = loader(None)
+
+                if file_loader is not None:
+                    break
+
+            if not search_path.endswith("/"):
+                search_path += "/"
+
+            if path.startswith(search_path):
+                real_filename, file_loader = loader(path[len(search_path) :])
+
+                if file_loader is not None:
+                    break
+
+        if file_loader is None or not self.is_allowed(real_filename):
+            return self.app(environ, start_response)
+
+        guessed_type = mimetypes.guess_type(real_filename)
+        mime_type = get_content_type(guessed_type[0] or self.fallback_mimetype, "utf-8")
+        f, mtime, file_size = file_loader()
+
+        headers = [("Date", http_date())]
+
+        if self.cache:
+            timeout = self.cache_timeout
+            etag = self.generate_etag(mtime, file_size, real_filename)
+            headers += [
+                ("Etag", '"%s"' % etag),
+                ("Cache-Control", "max-age=%d, public" % timeout),
+            ]
+
+            if not is_resource_modified(environ, etag, last_modified=mtime):
+                f.close()
+                start_response("304 Not Modified", headers)
+                return []
+
+            headers.append(("Expires", http_date(time() + timeout)))
+        else:
+            headers.append(("Cache-Control", "public"))
+
+        headers.extend(
+            (
+                ("Content-Type", mime_type),
+                ("Content-Length", str(file_size)),
+                ("Last-Modified", http_date(mtime)),
+            )
+        )
+        start_response("200 OK", headers)
+        return wrap_file(environ, f)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/posixemulation.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/posixemulation.py
new file mode 100644
index 0000000..696b456
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/posixemulation.py
@@ -0,0 +1,117 @@
+# -*- coding: utf-8 -*-
+r"""
+    werkzeug.posixemulation
+    ~~~~~~~~~~~~~~~~~~~~~~~
+
+    Provides a POSIX emulation for some features that are relevant to
+    web applications.  The main purpose is to simplify support for
+    systems such as Windows NT that are not 100% POSIX compatible.
+
+    Currently this only implements a :func:`rename` function that
+    follows POSIX semantics.  Eg: if the target file already exists it
+    will be replaced without asking.
+
+    This module was introduced in 0.6.1 and is not a public interface.
+    It might become one in later versions of Werkzeug.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import errno
+import os
+import random
+import sys
+import time
+
+from ._compat import to_unicode
+from .filesystem import get_filesystem_encoding
+
+can_rename_open_file = False
+
+if os.name == "nt":
+    try:
+        import ctypes
+
+        _MOVEFILE_REPLACE_EXISTING = 0x1
+        _MOVEFILE_WRITE_THROUGH = 0x8
+        _MoveFileEx = ctypes.windll.kernel32.MoveFileExW
+
+        def _rename(src, dst):
+            src = to_unicode(src, get_filesystem_encoding())
+            dst = to_unicode(dst, get_filesystem_encoding())
+            if _rename_atomic(src, dst):
+                return True
+            retry = 0
+            rv = False
+            while not rv and retry < 100:
+                rv = _MoveFileEx(
+                    src, dst, _MOVEFILE_REPLACE_EXISTING | _MOVEFILE_WRITE_THROUGH
+                )
+                if not rv:
+                    time.sleep(0.001)
+                    retry += 1
+            return rv
+
+        # new in Vista and Windows Server 2008
+        _CreateTransaction = ctypes.windll.ktmw32.CreateTransaction
+        _CommitTransaction = ctypes.windll.ktmw32.CommitTransaction
+        _MoveFileTransacted = ctypes.windll.kernel32.MoveFileTransactedW
+        _CloseHandle = ctypes.windll.kernel32.CloseHandle
+        can_rename_open_file = True
+
+        def _rename_atomic(src, dst):
+            ta = _CreateTransaction(None, 0, 0, 0, 0, 1000, "Werkzeug rename")
+            if ta == -1:
+                return False
+            try:
+                retry = 0
+                rv = False
+                while not rv and retry < 100:
+                    rv = _MoveFileTransacted(
+                        src,
+                        dst,
+                        None,
+                        None,
+                        _MOVEFILE_REPLACE_EXISTING | _MOVEFILE_WRITE_THROUGH,
+                        ta,
+                    )
+                    if rv:
+                        rv = _CommitTransaction(ta)
+                        break
+                    else:
+                        time.sleep(0.001)
+                        retry += 1
+                return rv
+            finally:
+                _CloseHandle(ta)
+
+    except Exception:
+
+        def _rename(src, dst):
+            return False
+
+        def _rename_atomic(src, dst):
+            return False
+
+    def rename(src, dst):
+        # Try atomic or pseudo-atomic rename
+        if _rename(src, dst):
+            return
+        # Fall back to "move away and replace"
+        try:
+            os.rename(src, dst)
+        except OSError as e:
+            if e.errno != errno.EEXIST:
+                raise
+            old = "%s-%08x" % (dst, random.randint(0, sys.maxsize))
+            os.rename(dst, old)
+            os.rename(src, dst)
+            try:
+                os.unlink(old)
+            except Exception:
+                pass
+
+
+else:
+    rename = os.rename
+    can_rename_open_file = True
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/routing.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/routing.py
new file mode 100644
index 0000000..e090c66
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/routing.py
@@ -0,0 +1,2210 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.routing
+    ~~~~~~~~~~~~~~~~
+
+    When it comes to combining multiple controller or view functions (however
+    you want to call them) you need a dispatcher.  A simple way would be
+    applying regular expression tests on the ``PATH_INFO`` and calling
+    registered callback functions that return the value then.
+
+    This module implements a much more powerful system than simple regular
+    expression matching because it can also convert values in the URLs and
+    build URLs.
+
+    Here a simple example that creates an URL map for an application with
+    two subdomains (www and kb) and some URL rules:
+
+    >>> m = Map([
+    ...     # Static URLs
+    ...     Rule('/', endpoint='static/index'),
+    ...     Rule('/about', endpoint='static/about'),
+    ...     Rule('/help', endpoint='static/help'),
+    ...     # Knowledge Base
+    ...     Subdomain('kb', [
+    ...         Rule('/', endpoint='kb/index'),
+    ...         Rule('/browse/', endpoint='kb/browse'),
+    ...         Rule('/browse/<int:id>/', endpoint='kb/browse'),
+    ...         Rule('/browse/<int:id>/<int:page>', endpoint='kb/browse')
+    ...     ])
+    ... ], default_subdomain='www')
+
+    If the application doesn't use subdomains it's perfectly fine to not set
+    the default subdomain and not use the `Subdomain` rule factory.  The endpoint
+    in the rules can be anything, for example import paths or unique
+    identifiers.  The WSGI application can use those endpoints to get the
+    handler for that URL.  It doesn't have to be a string at all but it's
+    recommended.
+
+    Now it's possible to create a URL adapter for one of the subdomains and
+    build URLs:
+
+    >>> c = m.bind('example.com')
+    >>> c.build("kb/browse", dict(id=42))
+    'http://kb.example.com/browse/42/'
+    >>> c.build("kb/browse", dict())
+    'http://kb.example.com/browse/'
+    >>> c.build("kb/browse", dict(id=42, page=3))
+    'http://kb.example.com/browse/42/3'
+    >>> c.build("static/about")
+    '/about'
+    >>> c.build("static/index", force_external=True)
+    'http://www.example.com/'
+
+    >>> c = m.bind('example.com', subdomain='kb')
+    >>> c.build("static/about")
+    'http://www.example.com/about'
+
+    The first argument to bind is the server name *without* the subdomain.
+    Per default it will assume that the script is mounted on the root, but
+    often that's not the case so you can provide the real mount point as
+    second argument:
+
+    >>> c = m.bind('example.com', '/applications/example')
+
+    The third argument can be the subdomain, if not given the default
+    subdomain is used.  For more details about binding have a look at the
+    documentation of the `MapAdapter`.
+
+    And here is how you can match URLs:
+
+    >>> c = m.bind('example.com')
+    >>> c.match("/")
+    ('static/index', {})
+    >>> c.match("/about")
+    ('static/about', {})
+    >>> c = m.bind('example.com', '/', 'kb')
+    >>> c.match("/")
+    ('kb/index', {})
+    >>> c.match("/browse/42/23")
+    ('kb/browse', {'id': 42, 'page': 23})
+
+    If matching fails you get a `NotFound` exception, if the rule thinks
+    it's a good idea to redirect (for example because the URL was defined
+    to have a slash at the end but the request was missing that slash) it
+    will raise a `RequestRedirect` exception.  Both are subclasses of the
+    `HTTPException` so you can use those errors as responses in the
+    application.
+
+    If matching succeeded but the URL rule was incompatible to the given
+    method (for example there were only rules for `GET` and `HEAD` and
+    routing system tried to match a `POST` request) a `MethodNotAllowed`
+    exception is raised.
+
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import ast
+import difflib
+import posixpath
+import re
+import uuid
+import warnings
+from pprint import pformat
+from threading import Lock
+
+from ._compat import implements_to_string
+from ._compat import iteritems
+from ._compat import itervalues
+from ._compat import native_string_result
+from ._compat import string_types
+from ._compat import text_type
+from ._compat import to_bytes
+from ._compat import to_unicode
+from ._compat import wsgi_decoding_dance
+from ._internal import _encode_idna
+from ._internal import _get_environ
+from .datastructures import ImmutableDict
+from .datastructures import MultiDict
+from .exceptions import BadHost
+from .exceptions import BadRequest
+from .exceptions import HTTPException
+from .exceptions import MethodNotAllowed
+from .exceptions import NotFound
+from .urls import _fast_url_quote
+from .urls import url_encode
+from .urls import url_join
+from .urls import url_quote
+from .utils import cached_property
+from .utils import format_string
+from .utils import redirect
+from .wsgi import get_host
+
+_rule_re = re.compile(
+    r"""
+    (?P<static>[^<]*)                           # static rule data
+    <
+    (?:
+        (?P<converter>[a-zA-Z_][a-zA-Z0-9_]*)   # converter name
+        (?:\((?P<args>.*?)\))?                  # converter arguments
+        \:                                      # variable delimiter
+    )?
+    (?P<variable>[a-zA-Z_][a-zA-Z0-9_]*)        # variable name
+    >
+    """,
+    re.VERBOSE,
+)
+_simple_rule_re = re.compile(r"<([^>]+)>")
+_converter_args_re = re.compile(
+    r"""
+    ((?P<name>\w+)\s*=\s*)?
+    (?P<value>
+        True|False|
+        \d+.\d+|
+        \d+.|
+        \d+|
+        [\w\d_.]+|
+        [urUR]?(?P<stringval>"[^"]*?"|'[^']*')
+    )\s*,
+    """,
+    re.VERBOSE | re.UNICODE,
+)
+
+
+_PYTHON_CONSTANTS = {"None": None, "True": True, "False": False}
+
+
+def _pythonize(value):
+    if value in _PYTHON_CONSTANTS:
+        return _PYTHON_CONSTANTS[value]
+    for convert in int, float:
+        try:
+            return convert(value)
+        except ValueError:
+            pass
+    if value[:1] == value[-1:] and value[0] in "\"'":
+        value = value[1:-1]
+    return text_type(value)
+
+
+def parse_converter_args(argstr):
+    argstr += ","
+    args = []
+    kwargs = {}
+
+    for item in _converter_args_re.finditer(argstr):
+        value = item.group("stringval")
+        if value is None:
+            value = item.group("value")
+        value = _pythonize(value)
+        if not item.group("name"):
+            args.append(value)
+        else:
+            name = item.group("name")
+            kwargs[name] = value
+
+    return tuple(args), kwargs
+
+
+def parse_rule(rule):
+    """Parse a rule and return it as generator. Each iteration yields tuples
+    in the form ``(converter, arguments, variable)``. If the converter is
+    `None` it's a static url part, otherwise it's a dynamic one.
+
+    :internal:
+    """
+    pos = 0
+    end = len(rule)
+    do_match = _rule_re.match
+    used_names = set()
+    while pos < end:
+        m = do_match(rule, pos)
+        if m is None:
+            break
+        data = m.groupdict()
+        if data["static"]:
+            yield None, None, data["static"]
+        variable = data["variable"]
+        converter = data["converter"] or "default"
+        if variable in used_names:
+            raise ValueError("variable name %r used twice." % variable)
+        used_names.add(variable)
+        yield converter, data["args"] or None, variable
+        pos = m.end()
+    if pos < end:
+        remaining = rule[pos:]
+        if ">" in remaining or "<" in remaining:
+            raise ValueError("malformed url rule: %r" % rule)
+        yield None, None, remaining
+
+
+class RoutingException(Exception):
+    """Special exceptions that require the application to redirect, notifying
+    about missing urls, etc.
+
+    :internal:
+    """
+
+
+class RequestRedirect(HTTPException, RoutingException):
+    """Raise if the map requests a redirect. This is for example the case if
+    `strict_slashes` are activated and an url that requires a trailing slash.
+
+    The attribute `new_url` contains the absolute destination url.
+    """
+
+    code = 308
+
+    def __init__(self, new_url):
+        RoutingException.__init__(self, new_url)
+        self.new_url = new_url
+
+    def get_response(self, environ=None):
+        return redirect(self.new_url, self.code)
+
+
+class RequestPath(RoutingException):
+    """Internal exception."""
+
+    __slots__ = ("path_info",)
+
+    def __init__(self, path_info):
+        self.path_info = path_info
+
+
+class RequestAliasRedirect(RoutingException):  # noqa: B903
+    """This rule is an alias and wants to redirect to the canonical URL."""
+
+    def __init__(self, matched_values):
+        self.matched_values = matched_values
+
+
+@implements_to_string
+class BuildError(RoutingException, LookupError):
+    """Raised if the build system cannot find a URL for an endpoint with the
+    values provided.
+    """
+
+    def __init__(self, endpoint, values, method, adapter=None):
+        LookupError.__init__(self, endpoint, values, method)
+        self.endpoint = endpoint
+        self.values = values
+        self.method = method
+        self.adapter = adapter
+
+    @cached_property
+    def suggested(self):
+        return self.closest_rule(self.adapter)
+
+    def closest_rule(self, adapter):
+        def _score_rule(rule):
+            return sum(
+                [
+                    0.98
+                    * difflib.SequenceMatcher(
+                        None, rule.endpoint, self.endpoint
+                    ).ratio(),
+                    0.01 * bool(set(self.values or ()).issubset(rule.arguments)),
+                    0.01 * bool(rule.methods and self.method in rule.methods),
+                ]
+            )
+
+        if adapter and adapter.map._rules:
+            return max(adapter.map._rules, key=_score_rule)
+
+    def __str__(self):
+        message = []
+        message.append("Could not build url for endpoint %r" % self.endpoint)
+        if self.method:
+            message.append(" (%r)" % self.method)
+        if self.values:
+            message.append(" with values %r" % sorted(self.values.keys()))
+        message.append(".")
+        if self.suggested:
+            if self.endpoint == self.suggested.endpoint:
+                if self.method and self.method not in self.suggested.methods:
+                    message.append(
+                        " Did you mean to use methods %r?"
+                        % sorted(self.suggested.methods)
+                    )
+                missing_values = self.suggested.arguments.union(
+                    set(self.suggested.defaults or ())
+                ) - set(self.values.keys())
+                if missing_values:
+                    message.append(
+                        " Did you forget to specify values %r?" % sorted(missing_values)
+                    )
+            else:
+                message.append(" Did you mean %r instead?" % self.suggested.endpoint)
+        return u"".join(message)
+
+
+class WebsocketMismatch(BadRequest):
+    """The only matched rule is either a WebSocket and the request is
+    HTTP, or the rule is HTTP and the request is a WebSocket.
+    """
+
+
+class ValidationError(ValueError):
+    """Validation error.  If a rule converter raises this exception the rule
+    does not match the current URL and the next URL is tried.
+    """
+
+
+class RuleFactory(object):
+    """As soon as you have more complex URL setups it's a good idea to use rule
+    factories to avoid repetitive tasks.  Some of them are builtin, others can
+    be added by subclassing `RuleFactory` and overriding `get_rules`.
+    """
+
+    def get_rules(self, map):
+        """Subclasses of `RuleFactory` have to override this method and return
+        an iterable of rules."""
+        raise NotImplementedError()
+
+
+class Subdomain(RuleFactory):
+    """All URLs provided by this factory have the subdomain set to a
+    specific domain. For example if you want to use the subdomain for
+    the current language this can be a good setup::
+
+        url_map = Map([
+            Rule('/', endpoint='#select_language'),
+            Subdomain('<string(length=2):lang_code>', [
+                Rule('/', endpoint='index'),
+                Rule('/about', endpoint='about'),
+                Rule('/help', endpoint='help')
+            ])
+        ])
+
+    All the rules except for the ``'#select_language'`` endpoint will now
+    listen on a two letter long subdomain that holds the language code
+    for the current request.
+    """
+
+    def __init__(self, subdomain, rules):
+        self.subdomain = subdomain
+        self.rules = rules
+
+    def get_rules(self, map):
+        for rulefactory in self.rules:
+            for rule in rulefactory.get_rules(map):
+                rule = rule.empty()
+                rule.subdomain = self.subdomain
+                yield rule
+
+
+class Submount(RuleFactory):
+    """Like `Subdomain` but prefixes the URL rule with a given string::
+
+        url_map = Map([
+            Rule('/', endpoint='index'),
+            Submount('/blog', [
+                Rule('/', endpoint='blog/index'),
+                Rule('/entry/<entry_slug>', endpoint='blog/show')
+            ])
+        ])
+
+    Now the rule ``'blog/show'`` matches ``/blog/entry/<entry_slug>``.
+    """
+
+    def __init__(self, path, rules):
+        self.path = path.rstrip("/")
+        self.rules = rules
+
+    def get_rules(self, map):
+        for rulefactory in self.rules:
+            for rule in rulefactory.get_rules(map):
+                rule = rule.empty()
+                rule.rule = self.path + rule.rule
+                yield rule
+
+
+class EndpointPrefix(RuleFactory):
+    """Prefixes all endpoints (which must be strings for this factory) with
+    another string. This can be useful for sub applications::
+
+        url_map = Map([
+            Rule('/', endpoint='index'),
+            EndpointPrefix('blog/', [Submount('/blog', [
+                Rule('/', endpoint='index'),
+                Rule('/entry/<entry_slug>', endpoint='show')
+            ])])
+        ])
+    """
+
+    def __init__(self, prefix, rules):
+        self.prefix = prefix
+        self.rules = rules
+
+    def get_rules(self, map):
+        for rulefactory in self.rules:
+            for rule in rulefactory.get_rules(map):
+                rule = rule.empty()
+                rule.endpoint = self.prefix + rule.endpoint
+                yield rule
+
+
+class RuleTemplate(object):
+    """Returns copies of the rules wrapped and expands string templates in
+    the endpoint, rule, defaults or subdomain sections.
+
+    Here a small example for such a rule template::
+
+        from werkzeug.routing import Map, Rule, RuleTemplate
+
+        resource = RuleTemplate([
+            Rule('/$name/', endpoint='$name.list'),
+            Rule('/$name/<int:id>', endpoint='$name.show')
+        ])
+
+        url_map = Map([resource(name='user'), resource(name='page')])
+
+    When a rule template is called the keyword arguments are used to
+    replace the placeholders in all the string parameters.
+    """
+
+    def __init__(self, rules):
+        self.rules = list(rules)
+
+    def __call__(self, *args, **kwargs):
+        return RuleTemplateFactory(self.rules, dict(*args, **kwargs))
+
+
+class RuleTemplateFactory(RuleFactory):
+    """A factory that fills in template variables into rules.  Used by
+    `RuleTemplate` internally.
+
+    :internal:
+    """
+
+    def __init__(self, rules, context):
+        self.rules = rules
+        self.context = context
+
+    def get_rules(self, map):
+        for rulefactory in self.rules:
+            for rule in rulefactory.get_rules(map):
+                new_defaults = subdomain = None
+                if rule.defaults:
+                    new_defaults = {}
+                    for key, value in iteritems(rule.defaults):
+                        if isinstance(value, string_types):
+                            value = format_string(value, self.context)
+                        new_defaults[key] = value
+                if rule.subdomain is not None:
+                    subdomain = format_string(rule.subdomain, self.context)
+                new_endpoint = rule.endpoint
+                if isinstance(new_endpoint, string_types):
+                    new_endpoint = format_string(new_endpoint, self.context)
+                yield Rule(
+                    format_string(rule.rule, self.context),
+                    new_defaults,
+                    subdomain,
+                    rule.methods,
+                    rule.build_only,
+                    new_endpoint,
+                    rule.strict_slashes,
+                )
+
+
+def _prefix_names(src):
+    """ast parse and prefix names with `.` to avoid collision with user vars"""
+    tree = ast.parse(src).body[0]
+    if isinstance(tree, ast.Expr):
+        tree = tree.value
+    for node in ast.walk(tree):
+        if isinstance(node, ast.Name):
+            node.id = "." + node.id
+    return tree
+
+
+_CALL_CONVERTER_CODE_FMT = "self._converters[{elem!r}].to_url()"
+_IF_KWARGS_URL_ENCODE_CODE = """\
+if kwargs:
+    q = '?'
+    params = self._encode_query_vars(kwargs)
+else:
+    q = params = ''
+"""
+_IF_KWARGS_URL_ENCODE_AST = _prefix_names(_IF_KWARGS_URL_ENCODE_CODE)
+_URL_ENCODE_AST_NAMES = (_prefix_names("q"), _prefix_names("params"))
+
+
+@implements_to_string
+class Rule(RuleFactory):
+    """A Rule represents one URL pattern.  There are some options for `Rule`
+    that change the way it behaves and are passed to the `Rule` constructor.
+    Note that besides the rule-string all arguments *must* be keyword arguments
+    in order to not break the application on Werkzeug upgrades.
+
+    `string`
+        Rule strings basically are just normal URL paths with placeholders in
+        the format ``<converter(arguments):name>`` where the converter and the
+        arguments are optional.  If no converter is defined the `default`
+        converter is used which means `string` in the normal configuration.
+
+        URL rules that end with a slash are branch URLs, others are leaves.
+        If you have `strict_slashes` enabled (which is the default), all
+        branch URLs that are matched without a trailing slash will trigger a
+        redirect to the same URL with the missing slash appended.
+
+        The converters are defined on the `Map`.
+
+    `endpoint`
+        The endpoint for this rule. This can be anything. A reference to a
+        function, a string, a number etc.  The preferred way is using a string
+        because the endpoint is used for URL generation.
+
+    `defaults`
+        An optional dict with defaults for other rules with the same endpoint.
+        This is a bit tricky but useful if you want to have unique URLs::
+
+            url_map = Map([
+                Rule('/all/', defaults={'page': 1}, endpoint='all_entries'),
+                Rule('/all/page/<int:page>', endpoint='all_entries')
+            ])
+
+        If a user now visits ``http://example.com/all/page/1`` he will be
+        redirected to ``http://example.com/all/``.  If `redirect_defaults` is
+        disabled on the `Map` instance this will only affect the URL
+        generation.
+
+    `subdomain`
+        The subdomain rule string for this rule. If not specified the rule
+        only matches for the `default_subdomain` of the map.  If the map is
+        not bound to a subdomain this feature is disabled.
+
+        Can be useful if you want to have user profiles on different subdomains
+        and all subdomains are forwarded to your application::
+
+            url_map = Map([
+                Rule('/', subdomain='<username>', endpoint='user/homepage'),
+                Rule('/stats', subdomain='<username>', endpoint='user/stats')
+            ])
+
+    `methods`
+        A sequence of http methods this rule applies to.  If not specified, all
+        methods are allowed. For example this can be useful if you want different
+        endpoints for `POST` and `GET`.  If methods are defined and the path
+        matches but the method matched against is not in this list or in the
+        list of another rule for that path the error raised is of the type
+        `MethodNotAllowed` rather than `NotFound`.  If `GET` is present in the
+        list of methods and `HEAD` is not, `HEAD` is added automatically.
+
+    `strict_slashes`
+        Override the `Map` setting for `strict_slashes` only for this rule. If
+        not specified the `Map` setting is used.
+
+    `merge_slashes`
+        Override :attr:`Map.merge_slashes` for this rule.
+
+    `build_only`
+        Set this to True and the rule will never match but will create a URL
+        that can be build. This is useful if you have resources on a subdomain
+        or folder that are not handled by the WSGI application (like static data)
+
+    `redirect_to`
+        If given this must be either a string or callable.  In case of a
+        callable it's called with the url adapter that triggered the match and
+        the values of the URL as keyword arguments and has to return the target
+        for the redirect, otherwise it has to be a string with placeholders in
+        rule syntax::
+
+            def foo_with_slug(adapter, id):
+                # ask the database for the slug for the old id.  this of
+                # course has nothing to do with werkzeug.
+                return 'foo/' + Foo.get_slug_for_id(id)
+
+            url_map = Map([
+                Rule('/foo/<slug>', endpoint='foo'),
+                Rule('/some/old/url/<slug>', redirect_to='foo/<slug>'),
+                Rule('/other/old/url/<int:id>', redirect_to=foo_with_slug)
+            ])
+
+        When the rule is matched the routing system will raise a
+        `RequestRedirect` exception with the target for the redirect.
+
+        Keep in mind that the URL will be joined against the URL root of the
+        script so don't use a leading slash on the target URL unless you
+        really mean root of that domain.
+
+    `alias`
+        If enabled this rule serves as an alias for another rule with the same
+        endpoint and arguments.
+
+    `host`
+        If provided and the URL map has host matching enabled this can be
+        used to provide a match rule for the whole host.  This also means
+        that the subdomain feature is disabled.
+
+    `websocket`
+        If ``True``, this rule is only matches for WebSocket (``ws://``,
+        ``wss://``) requests. By default, rules will only match for HTTP
+        requests.
+
+    .. versionadded:: 1.0
+        Added ``websocket``.
+
+    .. versionadded:: 1.0
+        Added ``merge_slashes``.
+
+    .. versionadded:: 0.7
+        Added ``alias`` and ``host``.
+
+    .. versionchanged:: 0.6.1
+       ``HEAD`` is added to ``methods`` if ``GET`` is present.
+    """
+
+    def __init__(
+        self,
+        string,
+        defaults=None,
+        subdomain=None,
+        methods=None,
+        build_only=False,
+        endpoint=None,
+        strict_slashes=None,
+        merge_slashes=None,
+        redirect_to=None,
+        alias=False,
+        host=None,
+        websocket=False,
+    ):
+        if not string.startswith("/"):
+            raise ValueError("urls must start with a leading slash")
+        self.rule = string
+        self.is_leaf = not string.endswith("/")
+
+        self.map = None
+        self.strict_slashes = strict_slashes
+        self.merge_slashes = merge_slashes
+        self.subdomain = subdomain
+        self.host = host
+        self.defaults = defaults
+        self.build_only = build_only
+        self.alias = alias
+        self.websocket = websocket
+
+        if methods is not None:
+            if isinstance(methods, str):
+                raise TypeError("'methods' should be a list of strings.")
+
+            methods = {x.upper() for x in methods}
+
+            if "HEAD" not in methods and "GET" in methods:
+                methods.add("HEAD")
+
+            if websocket and methods - {"GET", "HEAD", "OPTIONS"}:
+                raise ValueError(
+                    "WebSocket rules can only use 'GET', 'HEAD', and 'OPTIONS' methods."
+                )
+
+        self.methods = methods
+        self.endpoint = endpoint
+        self.redirect_to = redirect_to
+
+        if defaults:
+            self.arguments = set(map(str, defaults))
+        else:
+            self.arguments = set()
+        self._trace = self._converters = self._regex = self._argument_weights = None
+
+    def empty(self):
+        """
+        Return an unbound copy of this rule.
+
+        This can be useful if want to reuse an already bound URL for another
+        map.  See ``get_empty_kwargs`` to override what keyword arguments are
+        provided to the new copy.
+        """
+        return type(self)(self.rule, **self.get_empty_kwargs())
+
+    def get_empty_kwargs(self):
+        """
+        Provides kwargs for instantiating empty copy with empty()
+
+        Use this method to provide custom keyword arguments to the subclass of
+        ``Rule`` when calling ``some_rule.empty()``.  Helpful when the subclass
+        has custom keyword arguments that are needed at instantiation.
+
+        Must return a ``dict`` that will be provided as kwargs to the new
+        instance of ``Rule``, following the initial ``self.rule`` value which
+        is always provided as the first, required positional argument.
+        """
+        defaults = None
+        if self.defaults:
+            defaults = dict(self.defaults)
+        return dict(
+            defaults=defaults,
+            subdomain=self.subdomain,
+            methods=self.methods,
+            build_only=self.build_only,
+            endpoint=self.endpoint,
+            strict_slashes=self.strict_slashes,
+            redirect_to=self.redirect_to,
+            alias=self.alias,
+            host=self.host,
+        )
+
+    def get_rules(self, map):
+        yield self
+
+    def refresh(self):
+        """Rebinds and refreshes the URL.  Call this if you modified the
+        rule in place.
+
+        :internal:
+        """
+        self.bind(self.map, rebind=True)
+
+    def bind(self, map, rebind=False):
+        """Bind the url to a map and create a regular expression based on
+        the information from the rule itself and the defaults from the map.
+
+        :internal:
+        """
+        if self.map is not None and not rebind:
+            raise RuntimeError("url rule %r already bound to map %r" % (self, self.map))
+        self.map = map
+        if self.strict_slashes is None:
+            self.strict_slashes = map.strict_slashes
+        if self.merge_slashes is None:
+            self.merge_slashes = map.merge_slashes
+        if self.subdomain is None:
+            self.subdomain = map.default_subdomain
+        self.compile()
+
+    def get_converter(self, variable_name, converter_name, args, kwargs):
+        """Looks up the converter for the given parameter.
+
+        .. versionadded:: 0.9
+        """
+        if converter_name not in self.map.converters:
+            raise LookupError("the converter %r does not exist" % converter_name)
+        return self.map.converters[converter_name](self.map, *args, **kwargs)
+
+    def _encode_query_vars(self, query_vars):
+        return url_encode(
+            query_vars,
+            charset=self.map.charset,
+            sort=self.map.sort_parameters,
+            key=self.map.sort_key,
+        )
+
+    def compile(self):
+        """Compiles the regular expression and stores it."""
+        assert self.map is not None, "rule not bound"
+
+        if self.map.host_matching:
+            domain_rule = self.host or ""
+        else:
+            domain_rule = self.subdomain or ""
+
+        self._trace = []
+        self._converters = {}
+        self._static_weights = []
+        self._argument_weights = []
+        regex_parts = []
+
+        def _build_regex(rule):
+            index = 0
+            for converter, arguments, variable in parse_rule(rule):
+                if converter is None:
+                    for match in re.finditer(r"/+|[^/]+", variable):
+                        part = match.group(0)
+                        if part.startswith("/"):
+                            if self.merge_slashes:
+                                regex_parts.append(r"/+?")
+                                self._trace.append((False, "/"))
+                            else:
+                                regex_parts.append(part)
+                                self._trace.append((False, part))
+                            continue
+                        self._trace.append((False, part))
+                        regex_parts.append(re.escape(part))
+                        if part:
+                            self._static_weights.append((index, -len(part)))
+                else:
+                    if arguments:
+                        c_args, c_kwargs = parse_converter_args(arguments)
+                    else:
+                        c_args = ()
+                        c_kwargs = {}
+                    convobj = self.get_converter(variable, converter, c_args, c_kwargs)
+                    regex_parts.append("(?P<%s>%s)" % (variable, convobj.regex))
+                    self._converters[variable] = convobj
+                    self._trace.append((True, variable))
+                    self._argument_weights.append(convobj.weight)
+                    self.arguments.add(str(variable))
+                index = index + 1
+
+        _build_regex(domain_rule)
+        regex_parts.append("\\|")
+        self._trace.append((False, "|"))
+        _build_regex(self.rule if self.is_leaf else self.rule.rstrip("/"))
+        if not self.is_leaf:
+            self._trace.append((False, "/"))
+
+        self._build = self._compile_builder(False).__get__(self, None)
+        self._build_unknown = self._compile_builder(True).__get__(self, None)
+
+        if self.build_only:
+            return
+
+        if not (self.is_leaf and self.strict_slashes):
+            reps = u"*" if self.merge_slashes else u"?"
+            tail = u"(?<!/)(?P<__suffix__>/%s)" % reps
+        else:
+            tail = u""
+
+        regex = u"^%s%s$" % (u"".join(regex_parts), tail)
+        self._regex = re.compile(regex, re.UNICODE)
+
+    def match(self, path, method=None):
+        """Check if the rule matches a given path. Path is a string in the
+        form ``"subdomain|/path"`` and is assembled by the map.  If
+        the map is doing host matching the subdomain part will be the host
+        instead.
+
+        If the rule matches a dict with the converted values is returned,
+        otherwise the return value is `None`.
+
+        :internal:
+        """
+        if not self.build_only:
+            require_redirect = False
+
+            m = self._regex.search(path)
+            if m is not None:
+                groups = m.groupdict()
+                # we have a folder like part of the url without a trailing
+                # slash and strict slashes enabled. raise an exception that
+                # tells the map to redirect to the same url but with a
+                # trailing slash
+                if (
+                    self.strict_slashes
+                    and not self.is_leaf
+                    and not groups.pop("__suffix__")
+                    and (
+                        method is None or self.methods is None or method in self.methods
+                    )
+                ):
+                    path += "/"
+                    require_redirect = True
+                # if we are not in strict slashes mode we have to remove
+                # a __suffix__
+                elif not self.strict_slashes:
+                    del groups["__suffix__"]
+
+                result = {}
+                for name, value in iteritems(groups):
+                    try:
+                        value = self._converters[name].to_python(value)
+                    except ValidationError:
+                        return
+                    result[str(name)] = value
+                if self.defaults:
+                    result.update(self.defaults)
+
+                if self.merge_slashes:
+                    new_path = "|".join(self.build(result, False))
+                    if path.endswith("/") and not new_path.endswith("/"):
+                        new_path += "/"
+                    if new_path.count("/") < path.count("/"):
+                        path = new_path
+                        require_redirect = True
+
+                if require_redirect:
+                    path = path.split("|", 1)[1]
+                    raise RequestPath(path)
+
+                if self.alias and self.map.redirect_defaults:
+                    raise RequestAliasRedirect(result)
+
+                return result
+
+    @staticmethod
+    def _get_func_code(code, name):
+        globs, locs = {}, {}
+        exec(code, globs, locs)
+        return locs[name]
+
+    def _compile_builder(self, append_unknown=True):
+        defaults = self.defaults or {}
+        dom_ops = []
+        url_ops = []
+
+        opl = dom_ops
+        for is_dynamic, data in self._trace:
+            if data == "|" and opl is dom_ops:
+                opl = url_ops
+                continue
+            # this seems like a silly case to ever come up but:
+            # if a default is given for a value that appears in the rule,
+            # resolve it to a constant ahead of time
+            if is_dynamic and data in defaults:
+                data = self._converters[data].to_url(defaults[data])
+                opl.append((False, data))
+            elif not is_dynamic:
+                opl.append(
+                    (False, url_quote(to_bytes(data, self.map.charset), safe="/:|+"))
+                )
+            else:
+                opl.append((True, data))
+
+        def _convert(elem):
+            ret = _prefix_names(_CALL_CONVERTER_CODE_FMT.format(elem=elem))
+            ret.args = [ast.Name(str(elem), ast.Load())]  # str for py2
+            return ret
+
+        def _parts(ops):
+            parts = [
+                _convert(elem) if is_dynamic else ast.Str(s=elem)
+                for is_dynamic, elem in ops
+            ]
+            parts = parts or [ast.Str("")]
+            # constant fold
+            ret = [parts[0]]
+            for p in parts[1:]:
+                if isinstance(p, ast.Str) and isinstance(ret[-1], ast.Str):
+                    ret[-1] = ast.Str(ret[-1].s + p.s)
+                else:
+                    ret.append(p)
+            return ret
+
+        dom_parts = _parts(dom_ops)
+        url_parts = _parts(url_ops)
+        if not append_unknown:
+            body = []
+        else:
+            body = [_IF_KWARGS_URL_ENCODE_AST]
+            url_parts.extend(_URL_ENCODE_AST_NAMES)
+
+        def _join(parts):
+            if len(parts) == 1:  # shortcut
+                return parts[0]
+            elif hasattr(ast, "JoinedStr"):  # py36+
+                return ast.JoinedStr(parts)
+            else:
+                call = _prefix_names('"".join()')
+                call.args = [ast.Tuple(parts, ast.Load())]
+                return call
+
+        body.append(
+            ast.Return(ast.Tuple([_join(dom_parts), _join(url_parts)], ast.Load()))
+        )
+
+        # str is necessary for python2
+        pargs = [
+            str(elem)
+            for is_dynamic, elem in dom_ops + url_ops
+            if is_dynamic and elem not in defaults
+        ]
+        kargs = [str(k) for k in defaults]
+
+        func_ast = _prefix_names("def _(): pass")
+        func_ast.name = "<builder:{!r}>".format(self.rule)
+        if hasattr(ast, "arg"):  # py3
+            func_ast.args.args.append(ast.arg(".self", None))
+            for arg in pargs + kargs:
+                func_ast.args.args.append(ast.arg(arg, None))
+            func_ast.args.kwarg = ast.arg(".kwargs", None)
+        else:
+            func_ast.args.args.append(ast.Name(".self", ast.Param()))
+            for arg in pargs + kargs:
+                func_ast.args.args.append(ast.Name(arg, ast.Param()))
+            func_ast.args.kwarg = ".kwargs"
+        for _ in kargs:
+            func_ast.args.defaults.append(ast.Str(""))
+        func_ast.body = body
+
+        # use `ast.parse` instead of `ast.Module` for better portability
+        # python3.8 changes the signature of `ast.Module`
+        module = ast.parse("")
+        module.body = [func_ast]
+
+        # mark everything as on line 1, offset 0
+        # less error-prone than `ast.fix_missing_locations`
+        # bad line numbers cause an assert to fail in debug builds
+        for node in ast.walk(module):
+            if "lineno" in node._attributes:
+                node.lineno = 1
+            if "col_offset" in node._attributes:
+                node.col_offset = 0
+
+        code = compile(module, "<werkzeug routing>", "exec")
+        return self._get_func_code(code, func_ast.name)
+
+    def build(self, values, append_unknown=True):
+        """Assembles the relative url for that rule and the subdomain.
+        If building doesn't work for some reasons `None` is returned.
+
+        :internal:
+        """
+        try:
+            if append_unknown:
+                return self._build_unknown(**values)
+            else:
+                return self._build(**values)
+        except ValidationError:
+            return None
+
+    def provides_defaults_for(self, rule):
+        """Check if this rule has defaults for a given rule.
+
+        :internal:
+        """
+        return (
+            not self.build_only
+            and self.defaults
+            and self.endpoint == rule.endpoint
+            and self != rule
+            and self.arguments == rule.arguments
+        )
+
+    def suitable_for(self, values, method=None):
+        """Check if the dict of values has enough data for url generation.
+
+        :internal:
+        """
+        # if a method was given explicitly and that method is not supported
+        # by this rule, this rule is not suitable.
+        if (
+            method is not None
+            and self.methods is not None
+            and method not in self.methods
+        ):
+            return False
+
+        defaults = self.defaults or ()
+
+        # all arguments required must be either in the defaults dict or
+        # the value dictionary otherwise it's not suitable
+        for key in self.arguments:
+            if key not in defaults and key not in values:
+                return False
+
+        # in case defaults are given we ensure that either the value was
+        # skipped or the value is the same as the default value.
+        if defaults:
+            for key, value in iteritems(defaults):
+                if key in values and value != values[key]:
+                    return False
+
+        return True
+
+    def match_compare_key(self):
+        """The match compare key for sorting.
+
+        Current implementation:
+
+        1.  rules without any arguments come first for performance
+            reasons only as we expect them to match faster and some
+            common ones usually don't have any arguments (index pages etc.)
+        2.  rules with more static parts come first so the second argument
+            is the negative length of the number of the static weights.
+        3.  we order by static weights, which is a combination of index
+            and length
+        4.  The more complex rules come first so the next argument is the
+            negative length of the number of argument weights.
+        5.  lastly we order by the actual argument weights.
+
+        :internal:
+        """
+        return (
+            bool(self.arguments),
+            -len(self._static_weights),
+            self._static_weights,
+            -len(self._argument_weights),
+            self._argument_weights,
+        )
+
+    def build_compare_key(self):
+        """The build compare key for sorting.
+
+        :internal:
+        """
+        return 1 if self.alias else 0, -len(self.arguments), -len(self.defaults or ())
+
+    def __eq__(self, other):
+        return self.__class__ is other.__class__ and self._trace == other._trace
+
+    __hash__ = None
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __str__(self):
+        return self.rule
+
+    @native_string_result
+    def __repr__(self):
+        if self.map is None:
+            return u"<%s (unbound)>" % self.__class__.__name__
+        tmp = []
+        for is_dynamic, data in self._trace:
+            if is_dynamic:
+                tmp.append(u"<%s>" % data)
+            else:
+                tmp.append(data)
+        return u"<%s %s%s -> %s>" % (
+            self.__class__.__name__,
+            repr((u"".join(tmp)).lstrip(u"|")).lstrip(u"u"),
+            self.methods is not None and u" (%s)" % u", ".join(self.methods) or u"",
+            self.endpoint,
+        )
+
+
+class BaseConverter(object):
+    """Base class for all converters."""
+
+    regex = "[^/]+"
+    weight = 100
+
+    def __init__(self, map):
+        self.map = map
+
+    def to_python(self, value):
+        return value
+
+    def to_url(self, value):
+        if isinstance(value, (bytes, bytearray)):
+            return _fast_url_quote(value)
+        return _fast_url_quote(text_type(value).encode(self.map.charset))
+
+
+class UnicodeConverter(BaseConverter):
+    """This converter is the default converter and accepts any string but
+    only one path segment.  Thus the string can not include a slash.
+
+    This is the default validator.
+
+    Example::
+
+        Rule('/pages/<page>'),
+        Rule('/<string(length=2):lang_code>')
+
+    :param map: the :class:`Map`.
+    :param minlength: the minimum length of the string.  Must be greater
+                      or equal 1.
+    :param maxlength: the maximum length of the string.
+    :param length: the exact length of the string.
+    """
+
+    def __init__(self, map, minlength=1, maxlength=None, length=None):
+        BaseConverter.__init__(self, map)
+        if length is not None:
+            length = "{%d}" % int(length)
+        else:
+            if maxlength is None:
+                maxlength = ""
+            else:
+                maxlength = int(maxlength)
+            length = "{%s,%s}" % (int(minlength), maxlength)
+        self.regex = "[^/]" + length
+
+
+class AnyConverter(BaseConverter):
+    """Matches one of the items provided.  Items can either be Python
+    identifiers or strings::
+
+        Rule('/<any(about, help, imprint, class, "foo,bar"):page_name>')
+
+    :param map: the :class:`Map`.
+    :param items: this function accepts the possible items as positional
+                  arguments.
+    """
+
+    def __init__(self, map, *items):
+        BaseConverter.__init__(self, map)
+        self.regex = "(?:%s)" % "|".join([re.escape(x) for x in items])
+
+
+class PathConverter(BaseConverter):
+    """Like the default :class:`UnicodeConverter`, but it also matches
+    slashes.  This is useful for wikis and similar applications::
+
+        Rule('/<path:wikipage>')
+        Rule('/<path:wikipage>/edit')
+
+    :param map: the :class:`Map`.
+    """
+
+    regex = "[^/].*?"
+    weight = 200
+
+
+class NumberConverter(BaseConverter):
+    """Baseclass for `IntegerConverter` and `FloatConverter`.
+
+    :internal:
+    """
+
+    weight = 50
+
+    def __init__(self, map, fixed_digits=0, min=None, max=None, signed=False):
+        if signed:
+            self.regex = self.signed_regex
+        BaseConverter.__init__(self, map)
+        self.fixed_digits = fixed_digits
+        self.min = min
+        self.max = max
+        self.signed = signed
+
+    def to_python(self, value):
+        if self.fixed_digits and len(value) != self.fixed_digits:
+            raise ValidationError()
+        value = self.num_convert(value)
+        if (self.min is not None and value < self.min) or (
+            self.max is not None and value > self.max
+        ):
+            raise ValidationError()
+        return value
+
+    def to_url(self, value):
+        value = self.num_convert(value)
+        if self.fixed_digits:
+            value = ("%%0%sd" % self.fixed_digits) % value
+        return str(value)
+
+    @property
+    def signed_regex(self):
+        return r"-?" + self.regex
+
+
+class IntegerConverter(NumberConverter):
+    """This converter only accepts integer values::
+
+        Rule("/page/<int:page>")
+
+    By default it only accepts unsigned, positive values. The ``signed``
+    parameter will enable signed, negative values. ::
+
+        Rule("/page/<int(signed=True):page>")
+
+    :param map: The :class:`Map`.
+    :param fixed_digits: The number of fixed digits in the URL. If you
+        set this to ``4`` for example, the rule will only match if the
+        URL looks like ``/0001/``. The default is variable length.
+    :param min: The minimal value.
+    :param max: The maximal value.
+    :param signed: Allow signed (negative) values.
+
+    .. versionadded:: 0.15
+        The ``signed`` parameter.
+    """
+
+    regex = r"\d+"
+    num_convert = int
+
+
+class FloatConverter(NumberConverter):
+    """This converter only accepts floating point values::
+
+        Rule("/probability/<float:probability>")
+
+    By default it only accepts unsigned, positive values. The ``signed``
+    parameter will enable signed, negative values. ::
+
+        Rule("/offset/<float(signed=True):offset>")
+
+    :param map: The :class:`Map`.
+    :param min: The minimal value.
+    :param max: The maximal value.
+    :param signed: Allow signed (negative) values.
+
+    .. versionadded:: 0.15
+        The ``signed`` parameter.
+    """
+
+    regex = r"\d+\.\d+"
+    num_convert = float
+
+    def __init__(self, map, min=None, max=None, signed=False):
+        NumberConverter.__init__(self, map, min=min, max=max, signed=signed)
+
+
+class UUIDConverter(BaseConverter):
+    """This converter only accepts UUID strings::
+
+        Rule('/object/<uuid:identifier>')
+
+    .. versionadded:: 0.10
+
+    :param map: the :class:`Map`.
+    """
+
+    regex = (
+        r"[A-Fa-f0-9]{8}-[A-Fa-f0-9]{4}-"
+        r"[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{12}"
+    )
+
+    def to_python(self, value):
+        return uuid.UUID(value)
+
+    def to_url(self, value):
+        return str(value)
+
+
+#: the default converter mapping for the map.
+DEFAULT_CONVERTERS = {
+    "default": UnicodeConverter,
+    "string": UnicodeConverter,
+    "any": AnyConverter,
+    "path": PathConverter,
+    "int": IntegerConverter,
+    "float": FloatConverter,
+    "uuid": UUIDConverter,
+}
+
+
+class Map(object):
+    """The map class stores all the URL rules and some configuration
+    parameters.  Some of the configuration values are only stored on the
+    `Map` instance since those affect all rules, others are just defaults
+    and can be overridden for each rule.  Note that you have to specify all
+    arguments besides the `rules` as keyword arguments!
+
+    :param rules: sequence of url rules for this map.
+    :param default_subdomain: The default subdomain for rules without a
+                              subdomain defined.
+    :param charset: charset of the url. defaults to ``"utf-8"``
+    :param strict_slashes: If a rule ends with a slash but the matched
+        URL does not, redirect to the URL with a trailing slash.
+    :param merge_slashes: Merge consecutive slashes when matching or
+        building URLs. Matches will redirect to the normalized URL.
+        Slashes in variable parts are not merged.
+    :param redirect_defaults: This will redirect to the default rule if it
+                              wasn't visited that way. This helps creating
+                              unique URLs.
+    :param converters: A dict of converters that adds additional converters
+                       to the list of converters. If you redefine one
+                       converter this will override the original one.
+    :param sort_parameters: If set to `True` the url parameters are sorted.
+                            See `url_encode` for more details.
+    :param sort_key: The sort key function for `url_encode`.
+    :param encoding_errors: the error method to use for decoding
+    :param host_matching: if set to `True` it enables the host matching
+                          feature and disables the subdomain one.  If
+                          enabled the `host` parameter to rules is used
+                          instead of the `subdomain` one.
+
+    .. versionchanged:: 1.0
+        If ``url_scheme`` is ``ws`` or ``wss``, only WebSocket rules
+        will match.
+
+    .. versionchanged:: 1.0
+        Added ``merge_slashes``.
+
+    .. versionchanged:: 0.7
+        Added ``encoding_errors`` and ``host_matching``.
+
+    .. versionchanged:: 0.5
+        Added ``sort_parameters`` and ``sort_key``.
+    """
+
+    #: A dict of default converters to be used.
+    default_converters = ImmutableDict(DEFAULT_CONVERTERS)
+
+    #: The type of lock to use when updating.
+    #:
+    #: .. versionadded:: 1.0
+    lock_class = Lock
+
+    def __init__(
+        self,
+        rules=None,
+        default_subdomain="",
+        charset="utf-8",
+        strict_slashes=True,
+        merge_slashes=True,
+        redirect_defaults=True,
+        converters=None,
+        sort_parameters=False,
+        sort_key=None,
+        encoding_errors="replace",
+        host_matching=False,
+    ):
+        self._rules = []
+        self._rules_by_endpoint = {}
+        self._remap = True
+        self._remap_lock = self.lock_class()
+
+        self.default_subdomain = default_subdomain
+        self.charset = charset
+        self.encoding_errors = encoding_errors
+        self.strict_slashes = strict_slashes
+        self.merge_slashes = merge_slashes
+        self.redirect_defaults = redirect_defaults
+        self.host_matching = host_matching
+
+        self.converters = self.default_converters.copy()
+        if converters:
+            self.converters.update(converters)
+
+        self.sort_parameters = sort_parameters
+        self.sort_key = sort_key
+
+        for rulefactory in rules or ():
+            self.add(rulefactory)
+
+    def is_endpoint_expecting(self, endpoint, *arguments):
+        """Iterate over all rules and check if the endpoint expects
+        the arguments provided.  This is for example useful if you have
+        some URLs that expect a language code and others that do not and
+        you want to wrap the builder a bit so that the current language
+        code is automatically added if not provided but endpoints expect
+        it.
+
+        :param endpoint: the endpoint to check.
+        :param arguments: this function accepts one or more arguments
+                          as positional arguments.  Each one of them is
+                          checked.
+        """
+        self.update()
+        arguments = set(arguments)
+        for rule in self._rules_by_endpoint[endpoint]:
+            if arguments.issubset(rule.arguments):
+                return True
+        return False
+
+    def iter_rules(self, endpoint=None):
+        """Iterate over all rules or the rules of an endpoint.
+
+        :param endpoint: if provided only the rules for that endpoint
+                         are returned.
+        :return: an iterator
+        """
+        self.update()
+        if endpoint is not None:
+            return iter(self._rules_by_endpoint[endpoint])
+        return iter(self._rules)
+
+    def add(self, rulefactory):
+        """Add a new rule or factory to the map and bind it.  Requires that the
+        rule is not bound to another map.
+
+        :param rulefactory: a :class:`Rule` or :class:`RuleFactory`
+        """
+        for rule in rulefactory.get_rules(self):
+            rule.bind(self)
+            self._rules.append(rule)
+            self._rules_by_endpoint.setdefault(rule.endpoint, []).append(rule)
+        self._remap = True
+
+    def bind(
+        self,
+        server_name,
+        script_name=None,
+        subdomain=None,
+        url_scheme="http",
+        default_method="GET",
+        path_info=None,
+        query_args=None,
+    ):
+        """Return a new :class:`MapAdapter` with the details specified to the
+        call.  Note that `script_name` will default to ``'/'`` if not further
+        specified or `None`.  The `server_name` at least is a requirement
+        because the HTTP RFC requires absolute URLs for redirects and so all
+        redirect exceptions raised by Werkzeug will contain the full canonical
+        URL.
+
+        If no path_info is passed to :meth:`match` it will use the default path
+        info passed to bind.  While this doesn't really make sense for
+        manual bind calls, it's useful if you bind a map to a WSGI
+        environment which already contains the path info.
+
+        `subdomain` will default to the `default_subdomain` for this map if
+        no defined. If there is no `default_subdomain` you cannot use the
+        subdomain feature.
+
+        .. versionchanged:: 1.0
+            If ``url_scheme`` is ``ws`` or ``wss``, only WebSocket rules
+            will match.
+
+        .. versionchanged:: 0.15
+            ``path_info`` defaults to ``'/'`` if ``None``.
+
+        .. versionchanged:: 0.8
+            ``query_args`` can be a string.
+
+        .. versionchanged:: 0.7
+            Added ``query_args``.
+        """
+        server_name = server_name.lower()
+        if self.host_matching:
+            if subdomain is not None:
+                raise RuntimeError("host matching enabled and a subdomain was provided")
+        elif subdomain is None:
+            subdomain = self.default_subdomain
+        if script_name is None:
+            script_name = "/"
+        if path_info is None:
+            path_info = "/"
+        try:
+            server_name = _encode_idna(server_name)
+        except UnicodeError:
+            raise BadHost()
+        return MapAdapter(
+            self,
+            server_name,
+            script_name,
+            subdomain,
+            url_scheme,
+            path_info,
+            default_method,
+            query_args,
+        )
+
+    def bind_to_environ(self, environ, server_name=None, subdomain=None):
+        """Like :meth:`bind` but you can pass it an WSGI environment and it
+        will fetch the information from that dictionary.  Note that because of
+        limitations in the protocol there is no way to get the current
+        subdomain and real `server_name` from the environment.  If you don't
+        provide it, Werkzeug will use `SERVER_NAME` and `SERVER_PORT` (or
+        `HTTP_HOST` if provided) as used `server_name` with disabled subdomain
+        feature.
+
+        If `subdomain` is `None` but an environment and a server name is
+        provided it will calculate the current subdomain automatically.
+        Example: `server_name` is ``'example.com'`` and the `SERVER_NAME`
+        in the wsgi `environ` is ``'staging.dev.example.com'`` the calculated
+        subdomain will be ``'staging.dev'``.
+
+        If the object passed as environ has an environ attribute, the value of
+        this attribute is used instead.  This allows you to pass request
+        objects.  Additionally `PATH_INFO` added as a default of the
+        :class:`MapAdapter` so that you don't have to pass the path info to
+        the match method.
+
+        .. versionchanged:: 1.0.0
+            If the passed server name specifies port 443, it will match
+            if the incoming scheme is ``https`` without a port.
+
+        .. versionchanged:: 1.0.0
+            A warning is shown when the passed server name does not
+            match the incoming WSGI server name.
+
+        .. versionchanged:: 0.8
+           This will no longer raise a ValueError when an unexpected server
+           name was passed.
+
+        .. versionchanged:: 0.5
+            previously this method accepted a bogus `calculate_subdomain`
+            parameter that did not have any effect.  It was removed because
+            of that.
+
+        :param environ: a WSGI environment.
+        :param server_name: an optional server name hint (see above).
+        :param subdomain: optionally the current subdomain (see above).
+        """
+        environ = _get_environ(environ)
+        wsgi_server_name = get_host(environ).lower()
+        scheme = environ["wsgi.url_scheme"]
+
+        if server_name is None:
+            server_name = wsgi_server_name
+        else:
+            server_name = server_name.lower()
+
+            # strip standard port to match get_host()
+            if scheme == "http" and server_name.endswith(":80"):
+                server_name = server_name[:-3]
+            elif scheme == "https" and server_name.endswith(":443"):
+                server_name = server_name[:-4]
+
+        if subdomain is None and not self.host_matching:
+            cur_server_name = wsgi_server_name.split(".")
+            real_server_name = server_name.split(".")
+            offset = -len(real_server_name)
+
+            if cur_server_name[offset:] != real_server_name:
+                # This can happen even with valid configs if the server was
+                # accessed directly by IP address under some situations.
+                # Instead of raising an exception like in Werkzeug 0.7 or
+                # earlier we go by an invalid subdomain which will result
+                # in a 404 error on matching.
+                warnings.warn(
+                    "Current server name '{}' doesn't match configured"
+                    " server name '{}'".format(wsgi_server_name, server_name),
+                    stacklevel=2,
+                )
+                subdomain = "<invalid>"
+            else:
+                subdomain = ".".join(filter(None, cur_server_name[:offset]))
+
+        def _get_wsgi_string(name):
+            val = environ.get(name)
+            if val is not None:
+                return wsgi_decoding_dance(val, self.charset)
+
+        script_name = _get_wsgi_string("SCRIPT_NAME")
+        path_info = _get_wsgi_string("PATH_INFO")
+        query_args = _get_wsgi_string("QUERY_STRING")
+        return Map.bind(
+            self,
+            server_name,
+            script_name,
+            subdomain,
+            scheme,
+            environ["REQUEST_METHOD"],
+            path_info,
+            query_args=query_args,
+        )
+
+    def update(self):
+        """Called before matching and building to keep the compiled rules
+        in the correct order after things changed.
+        """
+        if not self._remap:
+            return
+
+        with self._remap_lock:
+            if not self._remap:
+                return
+
+            self._rules.sort(key=lambda x: x.match_compare_key())
+            for rules in itervalues(self._rules_by_endpoint):
+                rules.sort(key=lambda x: x.build_compare_key())
+            self._remap = False
+
+    def __repr__(self):
+        rules = self.iter_rules()
+        return "%s(%s)" % (self.__class__.__name__, pformat(list(rules)))
+
+
+class MapAdapter(object):
+
+    """Returned by :meth:`Map.bind` or :meth:`Map.bind_to_environ` and does
+    the URL matching and building based on runtime information.
+    """
+
+    def __init__(
+        self,
+        map,
+        server_name,
+        script_name,
+        subdomain,
+        url_scheme,
+        path_info,
+        default_method,
+        query_args=None,
+    ):
+        self.map = map
+        self.server_name = to_unicode(server_name)
+        script_name = to_unicode(script_name)
+        if not script_name.endswith(u"/"):
+            script_name += u"/"
+        self.script_name = script_name
+        self.subdomain = to_unicode(subdomain)
+        self.url_scheme = to_unicode(url_scheme)
+        self.path_info = to_unicode(path_info)
+        self.default_method = to_unicode(default_method)
+        self.query_args = query_args
+        self.websocket = self.url_scheme in {"ws", "wss"}
+
+    def dispatch(
+        self, view_func, path_info=None, method=None, catch_http_exceptions=False
+    ):
+        """Does the complete dispatching process.  `view_func` is called with
+        the endpoint and a dict with the values for the view.  It should
+        look up the view function, call it, and return a response object
+        or WSGI application.  http exceptions are not caught by default
+        so that applications can display nicer error messages by just
+        catching them by hand.  If you want to stick with the default
+        error messages you can pass it ``catch_http_exceptions=True`` and
+        it will catch the http exceptions.
+
+        Here a small example for the dispatch usage::
+
+            from werkzeug.wrappers import Request, Response
+            from werkzeug.wsgi import responder
+            from werkzeug.routing import Map, Rule
+
+            def on_index(request):
+                return Response('Hello from the index')
+
+            url_map = Map([Rule('/', endpoint='index')])
+            views = {'index': on_index}
+
+            @responder
+            def application(environ, start_response):
+                request = Request(environ)
+                urls = url_map.bind_to_environ(environ)
+                return urls.dispatch(lambda e, v: views[e](request, **v),
+                                     catch_http_exceptions=True)
+
+        Keep in mind that this method might return exception objects, too, so
+        use :class:`Response.force_type` to get a response object.
+
+        :param view_func: a function that is called with the endpoint as
+                          first argument and the value dict as second.  Has
+                          to dispatch to the actual view function with this
+                          information.  (see above)
+        :param path_info: the path info to use for matching.  Overrides the
+                          path info specified on binding.
+        :param method: the HTTP method used for matching.  Overrides the
+                       method specified on binding.
+        :param catch_http_exceptions: set to `True` to catch any of the
+                                      werkzeug :class:`HTTPException`\\s.
+        """
+        try:
+            try:
+                endpoint, args = self.match(path_info, method)
+            except RequestRedirect as e:
+                return e
+            return view_func(endpoint, args)
+        except HTTPException as e:
+            if catch_http_exceptions:
+                return e
+            raise
+
+    def match(
+        self,
+        path_info=None,
+        method=None,
+        return_rule=False,
+        query_args=None,
+        websocket=None,
+    ):
+        """The usage is simple: you just pass the match method the current
+        path info as well as the method (which defaults to `GET`).  The
+        following things can then happen:
+
+        - you receive a `NotFound` exception that indicates that no URL is
+          matching.  A `NotFound` exception is also a WSGI application you
+          can call to get a default page not found page (happens to be the
+          same object as `werkzeug.exceptions.NotFound`)
+
+        - you receive a `MethodNotAllowed` exception that indicates that there
+          is a match for this URL but not for the current request method.
+          This is useful for RESTful applications.
+
+        - you receive a `RequestRedirect` exception with a `new_url`
+          attribute.  This exception is used to notify you about a request
+          Werkzeug requests from your WSGI application.  This is for example the
+          case if you request ``/foo`` although the correct URL is ``/foo/``
+          You can use the `RequestRedirect` instance as response-like object
+          similar to all other subclasses of `HTTPException`.
+
+        - you receive a ``WebsocketMismatch`` exception if the only
+          match is a WebSocket rule but the bind is an HTTP request, or
+          if the match is an HTTP rule but the bind is a WebSocket
+          request.
+
+        - you get a tuple in the form ``(endpoint, arguments)`` if there is
+          a match (unless `return_rule` is True, in which case you get a tuple
+          in the form ``(rule, arguments)``)
+
+        If the path info is not passed to the match method the default path
+        info of the map is used (defaults to the root URL if not defined
+        explicitly).
+
+        All of the exceptions raised are subclasses of `HTTPException` so they
+        can be used as WSGI responses. They will all render generic error or
+        redirect pages.
+
+        Here is a small example for matching:
+
+        >>> m = Map([
+        ...     Rule('/', endpoint='index'),
+        ...     Rule('/downloads/', endpoint='downloads/index'),
+        ...     Rule('/downloads/<int:id>', endpoint='downloads/show')
+        ... ])
+        >>> urls = m.bind("example.com", "/")
+        >>> urls.match("/", "GET")
+        ('index', {})
+        >>> urls.match("/downloads/42")
+        ('downloads/show', {'id': 42})
+
+        And here is what happens on redirect and missing URLs:
+
+        >>> urls.match("/downloads")
+        Traceback (most recent call last):
+          ...
+        RequestRedirect: http://example.com/downloads/
+        >>> urls.match("/missing")
+        Traceback (most recent call last):
+          ...
+        NotFound: 404 Not Found
+
+        :param path_info: the path info to use for matching.  Overrides the
+                          path info specified on binding.
+        :param method: the HTTP method used for matching.  Overrides the
+                       method specified on binding.
+        :param return_rule: return the rule that matched instead of just the
+                            endpoint (defaults to `False`).
+        :param query_args: optional query arguments that are used for
+                           automatic redirects as string or dictionary.  It's
+                           currently not possible to use the query arguments
+                           for URL matching.
+        :param websocket: Match WebSocket instead of HTTP requests. A
+            websocket request has a ``ws`` or ``wss``
+            :attr:`url_scheme`. This overrides that detection.
+
+        .. versionadded:: 1.0
+            Added ``websocket``.
+
+        .. versionchanged:: 0.8
+            ``query_args`` can be a string.
+
+        .. versionadded:: 0.7
+            Added ``query_args``.
+
+        .. versionadded:: 0.6
+            Added ``return_rule``.
+        """
+        self.map.update()
+        if path_info is None:
+            path_info = self.path_info
+        else:
+            path_info = to_unicode(path_info, self.map.charset)
+        if query_args is None:
+            query_args = self.query_args
+        method = (method or self.default_method).upper()
+
+        if websocket is None:
+            websocket = self.websocket
+
+        require_redirect = False
+
+        path = u"%s|%s" % (
+            self.map.host_matching and self.server_name or self.subdomain,
+            path_info and "/%s" % path_info.lstrip("/"),
+        )
+
+        have_match_for = set()
+        websocket_mismatch = False
+
+        for rule in self.map._rules:
+            try:
+                rv = rule.match(path, method)
+            except RequestPath as e:
+                raise RequestRedirect(
+                    self.make_redirect_url(
+                        url_quote(e.path_info, self.map.charset, safe="/:|+"),
+                        query_args,
+                    )
+                )
+            except RequestAliasRedirect as e:
+                raise RequestRedirect(
+                    self.make_alias_redirect_url(
+                        path, rule.endpoint, e.matched_values, method, query_args
+                    )
+                )
+            if rv is None:
+                continue
+            if rule.methods is not None and method not in rule.methods:
+                have_match_for.update(rule.methods)
+                continue
+
+            if rule.websocket != websocket:
+                websocket_mismatch = True
+                continue
+
+            if self.map.redirect_defaults:
+                redirect_url = self.get_default_redirect(rule, method, rv, query_args)
+                if redirect_url is not None:
+                    raise RequestRedirect(redirect_url)
+
+            if rule.redirect_to is not None:
+                if isinstance(rule.redirect_to, string_types):
+
+                    def _handle_match(match):
+                        value = rv[match.group(1)]
+                        return rule._converters[match.group(1)].to_url(value)
+
+                    redirect_url = _simple_rule_re.sub(_handle_match, rule.redirect_to)
+                else:
+                    redirect_url = rule.redirect_to(self, **rv)
+                raise RequestRedirect(
+                    str(
+                        url_join(
+                            "%s://%s%s%s"
+                            % (
+                                self.url_scheme or "http",
+                                self.subdomain + "." if self.subdomain else "",
+                                self.server_name,
+                                self.script_name,
+                            ),
+                            redirect_url,
+                        )
+                    )
+                )
+
+            if require_redirect:
+                raise RequestRedirect(
+                    self.make_redirect_url(
+                        url_quote(path_info, self.map.charset, safe="/:|+"), query_args
+                    )
+                )
+
+            if return_rule:
+                return rule, rv
+            else:
+                return rule.endpoint, rv
+
+        if have_match_for:
+            raise MethodNotAllowed(valid_methods=list(have_match_for))
+
+        if websocket_mismatch:
+            raise WebsocketMismatch()
+
+        raise NotFound()
+
+    def test(self, path_info=None, method=None):
+        """Test if a rule would match.  Works like `match` but returns `True`
+        if the URL matches, or `False` if it does not exist.
+
+        :param path_info: the path info to use for matching.  Overrides the
+                          path info specified on binding.
+        :param method: the HTTP method used for matching.  Overrides the
+                       method specified on binding.
+        """
+        try:
+            self.match(path_info, method)
+        except RequestRedirect:
+            pass
+        except HTTPException:
+            return False
+        return True
+
+    def allowed_methods(self, path_info=None):
+        """Returns the valid methods that match for a given path.
+
+        .. versionadded:: 0.7
+        """
+        try:
+            self.match(path_info, method="--")
+        except MethodNotAllowed as e:
+            return e.valid_methods
+        except HTTPException:
+            pass
+        return []
+
+    def get_host(self, domain_part):
+        """Figures out the full host name for the given domain part.  The
+        domain part is a subdomain in case host matching is disabled or
+        a full host name.
+        """
+        if self.map.host_matching:
+            if domain_part is None:
+                return self.server_name
+            return to_unicode(domain_part, "ascii")
+        subdomain = domain_part
+        if subdomain is None:
+            subdomain = self.subdomain
+        else:
+            subdomain = to_unicode(subdomain, "ascii")
+        return (subdomain + u"." if subdomain else u"") + self.server_name
+
+    def get_default_redirect(self, rule, method, values, query_args):
+        """A helper that returns the URL to redirect to if it finds one.
+        This is used for default redirecting only.
+
+        :internal:
+        """
+        assert self.map.redirect_defaults
+        for r in self.map._rules_by_endpoint[rule.endpoint]:
+            # every rule that comes after this one, including ourself
+            # has a lower priority for the defaults.  We order the ones
+            # with the highest priority up for building.
+            if r is rule:
+                break
+            if r.provides_defaults_for(rule) and r.suitable_for(values, method):
+                values.update(r.defaults)
+                domain_part, path = r.build(values)
+                return self.make_redirect_url(path, query_args, domain_part=domain_part)
+
+    def encode_query_args(self, query_args):
+        if not isinstance(query_args, string_types):
+            query_args = url_encode(query_args, self.map.charset)
+        return query_args
+
+    def make_redirect_url(self, path_info, query_args=None, domain_part=None):
+        """Creates a redirect URL.
+
+        :internal:
+        """
+        suffix = ""
+        if query_args:
+            suffix = "?" + self.encode_query_args(query_args)
+        return str(
+            "%s://%s/%s%s"
+            % (
+                self.url_scheme or "http",
+                self.get_host(domain_part),
+                posixpath.join(
+                    self.script_name[:-1].lstrip("/"), path_info.lstrip("/")
+                ),
+                suffix,
+            )
+        )
+
+    def make_alias_redirect_url(self, path, endpoint, values, method, query_args):
+        """Internally called to make an alias redirect URL."""
+        url = self.build(
+            endpoint, values, method, append_unknown=False, force_external=True
+        )
+        if query_args:
+            url += "?" + self.encode_query_args(query_args)
+        assert url != path, "detected invalid alias setting. No canonical URL found"
+        return url
+
+    def _partial_build(self, endpoint, values, method, append_unknown):
+        """Helper for :meth:`build`.  Returns subdomain and path for the
+        rule that accepts this endpoint, values and method.
+
+        :internal:
+        """
+        # in case the method is none, try with the default method first
+        if method is None:
+            rv = self._partial_build(
+                endpoint, values, self.default_method, append_unknown
+            )
+            if rv is not None:
+                return rv
+
+        # Default method did not match or a specific method is passed.
+        # Check all for first match with matching host. If no matching
+        # host is found, go with first result.
+        first_match = None
+
+        for rule in self.map._rules_by_endpoint.get(endpoint, ()):
+            if rule.suitable_for(values, method):
+                rv = rule.build(values, append_unknown)
+
+                if rv is not None:
+                    rv = (rv[0], rv[1], rule.websocket)
+                    if self.map.host_matching:
+                        if rv[0] == self.server_name:
+                            return rv
+                        elif first_match is None:
+                            first_match = rv
+                    else:
+                        return rv
+
+        return first_match
+
+    def build(
+        self,
+        endpoint,
+        values=None,
+        method=None,
+        force_external=False,
+        append_unknown=True,
+    ):
+        """Building URLs works pretty much the other way round.  Instead of
+        `match` you call `build` and pass it the endpoint and a dict of
+        arguments for the placeholders.
+
+        The `build` function also accepts an argument called `force_external`
+        which, if you set it to `True` will force external URLs. Per default
+        external URLs (include the server name) will only be used if the
+        target URL is on a different subdomain.
+
+        >>> m = Map([
+        ...     Rule('/', endpoint='index'),
+        ...     Rule('/downloads/', endpoint='downloads/index'),
+        ...     Rule('/downloads/<int:id>', endpoint='downloads/show')
+        ... ])
+        >>> urls = m.bind("example.com", "/")
+        >>> urls.build("index", {})
+        '/'
+        >>> urls.build("downloads/show", {'id': 42})
+        '/downloads/42'
+        >>> urls.build("downloads/show", {'id': 42}, force_external=True)
+        'http://example.com/downloads/42'
+
+        Because URLs cannot contain non ASCII data you will always get
+        bytestrings back.  Non ASCII characters are urlencoded with the
+        charset defined on the map instance.
+
+        Additional values are converted to unicode and appended to the URL as
+        URL querystring parameters:
+
+        >>> urls.build("index", {'q': 'My Searchstring'})
+        '/?q=My+Searchstring'
+
+        When processing those additional values, lists are furthermore
+        interpreted as multiple values (as per
+        :py:class:`werkzeug.datastructures.MultiDict`):
+
+        >>> urls.build("index", {'q': ['a', 'b', 'c']})
+        '/?q=a&q=b&q=c'
+
+        Passing a ``MultiDict`` will also add multiple values:
+
+        >>> urls.build("index", MultiDict((('p', 'z'), ('q', 'a'), ('q', 'b'))))
+        '/?p=z&q=a&q=b'
+
+        If a rule does not exist when building a `BuildError` exception is
+        raised.
+
+        The build method accepts an argument called `method` which allows you
+        to specify the method you want to have an URL built for if you have
+        different methods for the same endpoint specified.
+
+        .. versionadded:: 0.6
+           the `append_unknown` parameter was added.
+
+        :param endpoint: the endpoint of the URL to build.
+        :param values: the values for the URL to build.  Unhandled values are
+                       appended to the URL as query parameters.
+        :param method: the HTTP method for the rule if there are different
+                       URLs for different methods on the same endpoint.
+        :param force_external: enforce full canonical external URLs. If the URL
+                               scheme is not provided, this will generate
+                               a protocol-relative URL.
+        :param append_unknown: unknown parameters are appended to the generated
+                               URL as query string argument.  Disable this
+                               if you want the builder to ignore those.
+        """
+        self.map.update()
+
+        if values:
+            if isinstance(values, MultiDict):
+                temp_values = {}
+                # iteritems(dict, values) is like `values.lists()`
+                # without the call or `list()` coercion overhead.
+                for key, value in iteritems(dict, values):
+                    if not value:
+                        continue
+                    if len(value) == 1:  # flatten single item lists
+                        value = value[0]
+                        if value is None:  # drop None
+                            continue
+                    temp_values[key] = value
+                values = temp_values
+            else:
+                # drop None
+                values = dict(i for i in iteritems(values) if i[1] is not None)
+        else:
+            values = {}
+
+        rv = self._partial_build(endpoint, values, method, append_unknown)
+        if rv is None:
+            raise BuildError(endpoint, values, method, self)
+
+        domain_part, path, websocket = rv
+        host = self.get_host(domain_part)
+
+        # Always build WebSocket routes with the scheme (browsers
+        # require full URLs). If bound to a WebSocket, ensure that HTTP
+        # routes are built with an HTTP scheme.
+        url_scheme = self.url_scheme
+        secure = url_scheme in {"https", "wss"}
+
+        if websocket:
+            force_external = True
+            url_scheme = "wss" if secure else "ws"
+        elif url_scheme:
+            url_scheme = "https" if secure else "http"
+
+        # shortcut this.
+        if not force_external and (
+            (self.map.host_matching and host == self.server_name)
+            or (not self.map.host_matching and domain_part == self.subdomain)
+        ):
+            return "%s/%s" % (self.script_name.rstrip("/"), path.lstrip("/"))
+        return str(
+            "%s//%s%s/%s"
+            % (
+                url_scheme + ":" if url_scheme else "",
+                host,
+                self.script_name[:-1],
+                path.lstrip("/"),
+            )
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/security.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/security.py
new file mode 100644
index 0000000..2308040
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/security.py
@@ -0,0 +1,249 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.security
+    ~~~~~~~~~~~~~~~~~
+
+    Security related helpers such as secure password hashing tools.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import codecs
+import hashlib
+import hmac
+import os
+import posixpath
+from random import SystemRandom
+from struct import Struct
+
+from ._compat import izip
+from ._compat import PY2
+from ._compat import range_type
+from ._compat import text_type
+from ._compat import to_bytes
+from ._compat import to_native
+
+SALT_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+DEFAULT_PBKDF2_ITERATIONS = 150000
+
+_pack_int = Struct(">I").pack
+_builtin_safe_str_cmp = getattr(hmac, "compare_digest", None)
+_sys_rng = SystemRandom()
+_os_alt_seps = list(
+    sep for sep in [os.path.sep, os.path.altsep] if sep not in (None, "/")
+)
+
+
+def pbkdf2_hex(
+    data, salt, iterations=DEFAULT_PBKDF2_ITERATIONS, keylen=None, hashfunc=None
+):
+    """Like :func:`pbkdf2_bin`, but returns a hex-encoded string.
+
+    .. versionadded:: 0.9
+
+    :param data: the data to derive.
+    :param salt: the salt for the derivation.
+    :param iterations: the number of iterations.
+    :param keylen: the length of the resulting key.  If not provided,
+                   the digest size will be used.
+    :param hashfunc: the hash function to use.  This can either be the
+                     string name of a known hash function, or a function
+                     from the hashlib module.  Defaults to sha256.
+    """
+    rv = pbkdf2_bin(data, salt, iterations, keylen, hashfunc)
+    return to_native(codecs.encode(rv, "hex_codec"))
+
+
+def pbkdf2_bin(
+    data, salt, iterations=DEFAULT_PBKDF2_ITERATIONS, keylen=None, hashfunc=None
+):
+    """Returns a binary digest for the PBKDF2 hash algorithm of `data`
+    with the given `salt`. It iterates `iterations` times and produces a
+    key of `keylen` bytes. By default, SHA-256 is used as hash function;
+    a different hashlib `hashfunc` can be provided.
+
+    .. versionadded:: 0.9
+
+    :param data: the data to derive.
+    :param salt: the salt for the derivation.
+    :param iterations: the number of iterations.
+    :param keylen: the length of the resulting key.  If not provided
+                   the digest size will be used.
+    :param hashfunc: the hash function to use.  This can either be the
+                     string name of a known hash function or a function
+                     from the hashlib module.  Defaults to sha256.
+    """
+    if not hashfunc:
+        hashfunc = "sha256"
+
+    data = to_bytes(data)
+    salt = to_bytes(salt)
+
+    if callable(hashfunc):
+        _test_hash = hashfunc()
+        hash_name = getattr(_test_hash, "name", None)
+    else:
+        hash_name = hashfunc
+    return hashlib.pbkdf2_hmac(hash_name, data, salt, iterations, keylen)
+
+
+def safe_str_cmp(a, b):
+    """This function compares strings in somewhat constant time.  This
+    requires that the length of at least one string is known in advance.
+
+    Returns `True` if the two strings are equal, or `False` if they are not.
+
+    .. versionadded:: 0.7
+    """
+    if isinstance(a, text_type):
+        a = a.encode("utf-8")
+    if isinstance(b, text_type):
+        b = b.encode("utf-8")
+
+    if _builtin_safe_str_cmp is not None:
+        return _builtin_safe_str_cmp(a, b)
+
+    if len(a) != len(b):
+        return False
+
+    rv = 0
+    if PY2:
+        for x, y in izip(a, b):
+            rv |= ord(x) ^ ord(y)
+    else:
+        for x, y in izip(a, b):
+            rv |= x ^ y
+
+    return rv == 0
+
+
+def gen_salt(length):
+    """Generate a random string of SALT_CHARS with specified ``length``."""
+    if length <= 0:
+        raise ValueError("Salt length must be positive")
+    return "".join(_sys_rng.choice(SALT_CHARS) for _ in range_type(length))
+
+
+def _hash_internal(method, salt, password):
+    """Internal password hash helper.  Supports plaintext without salt,
+    unsalted and salted passwords.  In case salted passwords are used
+    hmac is used.
+    """
+    if method == "plain":
+        return password, method
+
+    if isinstance(password, text_type):
+        password = password.encode("utf-8")
+
+    if method.startswith("pbkdf2:"):
+        args = method[7:].split(":")
+        if len(args) not in (1, 2):
+            raise ValueError("Invalid number of arguments for PBKDF2")
+        method = args.pop(0)
+        iterations = args and int(args[0] or 0) or DEFAULT_PBKDF2_ITERATIONS
+        is_pbkdf2 = True
+        actual_method = "pbkdf2:%s:%d" % (method, iterations)
+    else:
+        is_pbkdf2 = False
+        actual_method = method
+
+    if is_pbkdf2:
+        if not salt:
+            raise ValueError("Salt is required for PBKDF2")
+        rv = pbkdf2_hex(password, salt, iterations, hashfunc=method)
+    elif salt:
+        if isinstance(salt, text_type):
+            salt = salt.encode("utf-8")
+        mac = _create_mac(salt, password, method)
+        rv = mac.hexdigest()
+    else:
+        rv = hashlib.new(method, password).hexdigest()
+    return rv, actual_method
+
+
+def _create_mac(key, msg, method):
+    if callable(method):
+        return hmac.HMAC(key, msg, method)
+
+    def hashfunc(d=b""):
+        return hashlib.new(method, d)
+
+    # Python 2.7 used ``hasattr(digestmod, '__call__')``
+    # to detect if hashfunc is callable
+    hashfunc.__call__ = hashfunc
+    return hmac.HMAC(key, msg, hashfunc)
+
+
+def generate_password_hash(password, method="pbkdf2:sha256", salt_length=8):
+    """Hash a password with the given method and salt with a string of
+    the given length. The format of the string returned includes the method
+    that was used so that :func:`check_password_hash` can check the hash.
+
+    The format for the hashed string looks like this::
+
+        method$salt$hash
+
+    This method can **not** generate unsalted passwords but it is possible
+    to set param method='plain' in order to enforce plaintext passwords.
+    If a salt is used, hmac is used internally to salt the password.
+
+    If PBKDF2 is wanted it can be enabled by setting the method to
+    ``pbkdf2:method:iterations`` where iterations is optional::
+
+        pbkdf2:sha256:80000$salt$hash
+        pbkdf2:sha256$salt$hash
+
+    :param password: the password to hash.
+    :param method: the hash method to use (one that hashlib supports). Can
+                   optionally be in the format ``pbkdf2:<method>[:iterations]``
+                   to enable PBKDF2.
+    :param salt_length: the length of the salt in letters.
+    """
+    salt = gen_salt(salt_length) if method != "plain" else ""
+    h, actual_method = _hash_internal(method, salt, password)
+    return "%s$%s$%s" % (actual_method, salt, h)
+
+
+def check_password_hash(pwhash, password):
+    """check a password against a given salted and hashed password value.
+    In order to support unsalted legacy passwords this method supports
+    plain text passwords, md5 and sha1 hashes (both salted and unsalted).
+
+    Returns `True` if the password matched, `False` otherwise.
+
+    :param pwhash: a hashed string like returned by
+                   :func:`generate_password_hash`.
+    :param password: the plaintext password to compare against the hash.
+    """
+    if pwhash.count("$") < 2:
+        return False
+    method, salt, hashval = pwhash.split("$", 2)
+    return safe_str_cmp(_hash_internal(method, salt, password)[0], hashval)
+
+
+def safe_join(directory, *pathnames):
+    """Safely join zero or more untrusted path components to a base
+    directory to avoid escaping the base directory.
+
+    :param directory: The trusted base directory.
+    :param pathnames: The untrusted path components relative to the
+        base directory.
+    :return: A safe path, otherwise ``None``.
+    """
+    parts = [directory]
+
+    for filename in pathnames:
+        if filename != "":
+            filename = posixpath.normpath(filename)
+
+        if (
+            any(sep in filename for sep in _os_alt_seps)
+            or os.path.isabs(filename)
+            or filename == ".."
+            or filename.startswith("../")
+        ):
+            return None
+
+        parts.append(filename)
+
+    return posixpath.join(*parts)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/serving.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/serving.py
new file mode 100644
index 0000000..f2a0dc9
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/serving.py
@@ -0,0 +1,1117 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.serving
+    ~~~~~~~~~~~~~~~~
+
+    There are many ways to serve a WSGI application.  While you're developing
+    it you usually don't want a full blown webserver like Apache but a simple
+    standalone one.  From Python 2.5 onwards there is the `wsgiref`_ server in
+    the standard library.  If you're using older versions of Python you can
+    download the package from the cheeseshop.
+
+    However there are some caveats. Sourcecode won't reload itself when
+    changed and each time you kill the server using ``^C`` you get an
+    `KeyboardInterrupt` error.  While the latter is easy to solve the first
+    one can be a pain in the ass in some situations.
+
+    The easiest way is creating a small ``start-myproject.py`` that runs the
+    application::
+
+        #!/usr/bin/env python
+        # -*- coding: utf-8 -*-
+        from myproject import make_app
+        from werkzeug.serving import run_simple
+
+        app = make_app(...)
+        run_simple('localhost', 8080, app, use_reloader=True)
+
+    You can also pass it a `extra_files` keyword argument with a list of
+    additional files (like configuration files) you want to observe.
+
+    For bigger applications you should consider using `click`
+    (http://click.pocoo.org) instead of a simple start file.
+
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import io
+import os
+import signal
+import socket
+import sys
+from datetime import datetime as dt
+from datetime import timedelta
+
+from ._compat import PY2
+from ._compat import reraise
+from ._compat import WIN
+from ._compat import wsgi_encoding_dance
+from ._internal import _log
+from .exceptions import InternalServerError
+from .urls import uri_to_iri
+from .urls import url_parse
+from .urls import url_unquote
+
+try:
+    import socketserver
+    from http.server import BaseHTTPRequestHandler
+    from http.server import HTTPServer
+except ImportError:
+    import SocketServer as socketserver
+    from BaseHTTPServer import HTTPServer
+    from BaseHTTPServer import BaseHTTPRequestHandler
+
+try:
+    import ssl
+except ImportError:
+
+    class _SslDummy(object):
+        def __getattr__(self, name):
+            raise RuntimeError("SSL support unavailable")
+
+    ssl = _SslDummy()
+
+try:
+    import click
+except ImportError:
+    click = None
+
+
+ThreadingMixIn = socketserver.ThreadingMixIn
+can_fork = hasattr(os, "fork")
+
+if can_fork:
+    ForkingMixIn = socketserver.ForkingMixIn
+else:
+
+    class ForkingMixIn(object):
+        pass
+
+
+try:
+    af_unix = socket.AF_UNIX
+except AttributeError:
+    af_unix = None
+
+
+LISTEN_QUEUE = 128
+can_open_by_fd = not WIN and hasattr(socket, "fromfd")
+
+# On Python 3, ConnectionError represents the same errnos as
+# socket.error from Python 2, while socket.error is an alias for the
+# more generic OSError.
+if PY2:
+    _ConnectionError = socket.error
+else:
+    _ConnectionError = ConnectionError
+
+
+class DechunkedInput(io.RawIOBase):
+    """An input stream that handles Transfer-Encoding 'chunked'"""
+
+    def __init__(self, rfile):
+        self._rfile = rfile
+        self._done = False
+        self._len = 0
+
+    def readable(self):
+        return True
+
+    def read_chunk_len(self):
+        try:
+            line = self._rfile.readline().decode("latin1")
+            _len = int(line.strip(), 16)
+        except ValueError:
+            raise IOError("Invalid chunk header")
+        if _len < 0:
+            raise IOError("Negative chunk length not allowed")
+        return _len
+
+    def readinto(self, buf):
+        read = 0
+        while not self._done and read < len(buf):
+            if self._len == 0:
+                # This is the first chunk or we fully consumed the previous
+                # one. Read the next length of the next chunk
+                self._len = self.read_chunk_len()
+
+            if self._len == 0:
+                # Found the final chunk of size 0. The stream is now exhausted,
+                # but there is still a final newline that should be consumed
+                self._done = True
+
+            if self._len > 0:
+                # There is data (left) in this chunk, so append it to the
+                # buffer. If this operation fully consumes the chunk, this will
+                # reset self._len to 0.
+                n = min(len(buf), self._len)
+                buf[read : read + n] = self._rfile.read(n)
+                self._len -= n
+                read += n
+
+            if self._len == 0:
+                # Skip the terminating newline of a chunk that has been fully
+                # consumed. This also applies to the 0-sized final chunk
+                terminator = self._rfile.readline()
+                if terminator not in (b"\n", b"\r\n", b"\r"):
+                    raise IOError("Missing chunk terminating newline")
+
+        return read
+
+
+class WSGIRequestHandler(BaseHTTPRequestHandler, object):
+
+    """A request handler that implements WSGI dispatching."""
+
+    @property
+    def server_version(self):
+        from . import __version__
+
+        return "Werkzeug/" + __version__
+
+    def make_environ(self):
+        request_url = url_parse(self.path)
+
+        def shutdown_server():
+            self.server.shutdown_signal = True
+
+        url_scheme = "http" if self.server.ssl_context is None else "https"
+        if not self.client_address:
+            self.client_address = "<local>"
+        if isinstance(self.client_address, str):
+            self.client_address = (self.client_address, 0)
+        else:
+            pass
+
+        # If there was no scheme but the path started with two slashes,
+        # the first segment may have been incorrectly parsed as the
+        # netloc, prepend it to the path again.
+        if not request_url.scheme and request_url.netloc:
+            path_info = "/%s%s" % (request_url.netloc, request_url.path)
+        else:
+            path_info = request_url.path
+
+        path_info = url_unquote(path_info)
+
+        environ = {
+            "wsgi.version": (1, 0),
+            "wsgi.url_scheme": url_scheme,
+            "wsgi.input": self.rfile,
+            "wsgi.errors": sys.stderr,
+            "wsgi.multithread": self.server.multithread,
+            "wsgi.multiprocess": self.server.multiprocess,
+            "wsgi.run_once": False,
+            "werkzeug.server.shutdown": shutdown_server,
+            "SERVER_SOFTWARE": self.server_version,
+            "REQUEST_METHOD": self.command,
+            "SCRIPT_NAME": "",
+            "PATH_INFO": wsgi_encoding_dance(path_info),
+            "QUERY_STRING": wsgi_encoding_dance(request_url.query),
+            # Non-standard, added by mod_wsgi, uWSGI
+            "REQUEST_URI": wsgi_encoding_dance(self.path),
+            # Non-standard, added by gunicorn
+            "RAW_URI": wsgi_encoding_dance(self.path),
+            "REMOTE_ADDR": self.address_string(),
+            "REMOTE_PORT": self.port_integer(),
+            "SERVER_NAME": self.server.server_address[0],
+            "SERVER_PORT": str(self.server.server_address[1]),
+            "SERVER_PROTOCOL": self.request_version,
+        }
+
+        for key, value in self.get_header_items():
+            key = key.upper().replace("-", "_")
+            value = value.replace("\r\n", "")
+            if key not in ("CONTENT_TYPE", "CONTENT_LENGTH"):
+                key = "HTTP_" + key
+                if key in environ:
+                    value = "{},{}".format(environ[key], value)
+            environ[key] = value
+
+        if environ.get("HTTP_TRANSFER_ENCODING", "").strip().lower() == "chunked":
+            environ["wsgi.input_terminated"] = True
+            environ["wsgi.input"] = DechunkedInput(environ["wsgi.input"])
+
+        # Per RFC 2616, if the URL is absolute, use that as the host.
+        # We're using "has a scheme" to indicate an absolute URL.
+        if request_url.scheme and request_url.netloc:
+            environ["HTTP_HOST"] = request_url.netloc
+
+        try:
+            # binary_form=False gives nicer information, but wouldn't be compatible with
+            # what Nginx or Apache could return.
+            peer_cert = self.connection.getpeercert(binary_form=True)
+            if peer_cert is not None:
+                # Nginx and Apache use PEM format.
+                environ["SSL_CLIENT_CERT"] = ssl.DER_cert_to_PEM_cert(peer_cert)
+        except ValueError:
+            # SSL handshake hasn't finished.
+            self.server.log("error", "Cannot fetch SSL peer certificate info")
+        except AttributeError:
+            # Not using TLS, the socket will not have getpeercert().
+            pass
+
+        return environ
+
+    def run_wsgi(self):
+        if self.headers.get("Expect", "").lower().strip() == "100-continue":
+            self.wfile.write(b"HTTP/1.1 100 Continue\r\n\r\n")
+
+        self.environ = environ = self.make_environ()
+        headers_set = []
+        headers_sent = []
+
+        def write(data):
+            assert headers_set, "write() before start_response"
+            if not headers_sent:
+                status, response_headers = headers_sent[:] = headers_set
+                try:
+                    code, msg = status.split(None, 1)
+                except ValueError:
+                    code, msg = status, ""
+                code = int(code)
+                self.send_response(code, msg)
+                header_keys = set()
+                for key, value in response_headers:
+                    self.send_header(key, value)
+                    key = key.lower()
+                    header_keys.add(key)
+                if not (
+                    "content-length" in header_keys
+                    or environ["REQUEST_METHOD"] == "HEAD"
+                    or code < 200
+                    or code in (204, 304)
+                ):
+                    self.close_connection = True
+                    self.send_header("Connection", "close")
+                if "server" not in header_keys:
+                    self.send_header("Server", self.version_string())
+                if "date" not in header_keys:
+                    self.send_header("Date", self.date_time_string())
+                self.end_headers()
+
+            assert isinstance(data, bytes), "applications must write bytes"
+            if data:
+                # Only write data if there is any to avoid Python 3.5 SSL bug
+                self.wfile.write(data)
+            self.wfile.flush()
+
+        def start_response(status, response_headers, exc_info=None):
+            if exc_info:
+                try:
+                    if headers_sent:
+                        reraise(*exc_info)
+                finally:
+                    exc_info = None
+            elif headers_set:
+                raise AssertionError("Headers already set")
+            headers_set[:] = [status, response_headers]
+            return write
+
+        def execute(app):
+            application_iter = app(environ, start_response)
+            try:
+                for data in application_iter:
+                    write(data)
+                if not headers_sent:
+                    write(b"")
+            finally:
+                if hasattr(application_iter, "close"):
+                    application_iter.close()
+
+        try:
+            execute(self.server.app)
+        except (_ConnectionError, socket.timeout) as e:
+            self.connection_dropped(e, environ)
+        except Exception:
+            if self.server.passthrough_errors:
+                raise
+            from .debug.tbtools import get_current_traceback
+
+            traceback = get_current_traceback(ignore_system_exceptions=True)
+            try:
+                # if we haven't yet sent the headers but they are set
+                # we roll back to be able to set them again.
+                if not headers_sent:
+                    del headers_set[:]
+                execute(InternalServerError())
+            except Exception:
+                pass
+            self.server.log("error", "Error on request:\n%s", traceback.plaintext)
+
+    def handle(self):
+        """Handles a request ignoring dropped connections."""
+        try:
+            BaseHTTPRequestHandler.handle(self)
+        except (_ConnectionError, socket.timeout) as e:
+            self.connection_dropped(e)
+        except Exception as e:
+            if self.server.ssl_context is None or not is_ssl_error(e):
+                raise
+        if self.server.shutdown_signal:
+            self.initiate_shutdown()
+
+    def initiate_shutdown(self):
+        """A horrible, horrible way to kill the server for Python 2.6 and
+        later.  It's the best we can do.
+        """
+        # Windows does not provide SIGKILL, go with SIGTERM then.
+        sig = getattr(signal, "SIGKILL", signal.SIGTERM)
+        # reloader active
+        if is_running_from_reloader():
+            os.kill(os.getpid(), sig)
+        # python 2.7
+        self.server._BaseServer__shutdown_request = True
+        # python 2.6
+        self.server._BaseServer__serving = False
+
+    def connection_dropped(self, error, environ=None):
+        """Called if the connection was closed by the client.  By default
+        nothing happens.
+        """
+
+    def handle_one_request(self):
+        """Handle a single HTTP request."""
+        self.raw_requestline = self.rfile.readline()
+        if not self.raw_requestline:
+            self.close_connection = 1
+        elif self.parse_request():
+            return self.run_wsgi()
+
+    def send_response(self, code, message=None):
+        """Send the response header and log the response code."""
+        self.log_request(code)
+        if message is None:
+            message = code in self.responses and self.responses[code][0] or ""
+        if self.request_version != "HTTP/0.9":
+            hdr = "%s %d %s\r\n" % (self.protocol_version, code, message)
+            self.wfile.write(hdr.encode("ascii"))
+
+    def version_string(self):
+        return BaseHTTPRequestHandler.version_string(self).strip()
+
+    def address_string(self):
+        if getattr(self, "environ", None):
+            return self.environ["REMOTE_ADDR"]
+        elif not self.client_address:
+            return "<local>"
+        elif isinstance(self.client_address, str):
+            return self.client_address
+        else:
+            return self.client_address[0]
+
+    def port_integer(self):
+        return self.client_address[1]
+
+    def log_request(self, code="-", size="-"):
+        try:
+            path = uri_to_iri(self.path)
+            msg = "%s %s %s" % (self.command, path, self.request_version)
+        except AttributeError:
+            # path isn't set if the requestline was bad
+            msg = self.requestline
+
+        code = str(code)
+
+        if click:
+            color = click.style
+
+            if code[0] == "1":  # 1xx - Informational
+                msg = color(msg, bold=True)
+            elif code[0] == "2":  # 2xx - Success
+                msg = color(msg, fg="white")
+            elif code == "304":  # 304 - Resource Not Modified
+                msg = color(msg, fg="cyan")
+            elif code[0] == "3":  # 3xx - Redirection
+                msg = color(msg, fg="green")
+            elif code == "404":  # 404 - Resource Not Found
+                msg = color(msg, fg="yellow")
+            elif code[0] == "4":  # 4xx - Client Error
+                msg = color(msg, fg="red", bold=True)
+            else:  # 5xx, or any other response
+                msg = color(msg, fg="magenta", bold=True)
+
+        self.log("info", '"%s" %s %s', msg, code, size)
+
+    def log_error(self, *args):
+        self.log("error", *args)
+
+    def log_message(self, format, *args):
+        self.log("info", format, *args)
+
+    def log(self, type, message, *args):
+        _log(
+            type,
+            "%s - - [%s] %s\n"
+            % (self.address_string(), self.log_date_time_string(), message % args),
+        )
+
+    def get_header_items(self):
+        """
+        Get an iterable list of key/value pairs representing headers.
+
+        This function provides Python 2/3 compatibility as related to the
+        parsing of request headers. Python 2.7 is not compliant with
+        RFC 3875 Section 4.1.18 which requires multiple values for headers
+        to be provided or RFC 2616 which allows for folding of multi-line
+        headers. This function will return a matching list regardless
+        of Python version. It can be removed once Python 2.7 support
+        is dropped.
+
+        :return: List of tuples containing header hey/value pairs
+        """
+        if PY2:
+            # For Python 2, process the headers manually according to
+            # W3C RFC 2616 Section 4.2.
+            items = []
+            for header in self.headers.headers:
+                # Remove "\r\n" from the header and split on ":" to get
+                # the field name and value.
+                try:
+                    key, value = header[0:-2].split(":", 1)
+                except ValueError:
+                    # If header could not be slit with : but starts with white
+                    # space and it follows an existing header, it's a folded
+                    # header.
+                    if header[0] in ("\t", " ") and items:
+                        # Pop off the last header
+                        key, value = items.pop()
+                        # Append the current header to the value of the last
+                        # header which will be placed back on the end of the
+                        # list
+                        value = value + header
+                    # Otherwise it's just a bad header and should error
+                    else:
+                        # Re-raise the value error
+                        raise
+
+                # Add the key and the value once stripped of leading
+                # white space. The specification allows for stripping
+                # trailing white space but the Python 3 code does not
+                # strip trailing white space. Therefore, trailing space
+                # will be left as is to match the Python 3 behavior.
+                items.append((key, value.lstrip()))
+        else:
+            items = self.headers.items()
+
+        return items
+
+
+#: backwards compatible name if someone is subclassing it
+BaseRequestHandler = WSGIRequestHandler
+
+
+def generate_adhoc_ssl_pair(cn=None):
+    try:
+        from cryptography import x509
+        from cryptography.x509.oid import NameOID
+        from cryptography.hazmat.backends import default_backend
+        from cryptography.hazmat.primitives import hashes
+        from cryptography.hazmat.primitives.asymmetric import rsa
+    except ImportError:
+        raise TypeError("Using ad-hoc certificates requires the cryptography library.")
+    pkey = rsa.generate_private_key(
+        public_exponent=65537, key_size=2048, backend=default_backend()
+    )
+
+    # pretty damn sure that this is not actually accepted by anyone
+    if cn is None:
+        cn = u"*"
+
+    subject = x509.Name(
+        [
+            x509.NameAttribute(NameOID.ORGANIZATION_NAME, u"Dummy Certificate"),
+            x509.NameAttribute(NameOID.COMMON_NAME, cn),
+        ]
+    )
+
+    cert = (
+        x509.CertificateBuilder()
+        .subject_name(subject)
+        .issuer_name(subject)
+        .public_key(pkey.public_key())
+        .serial_number(x509.random_serial_number())
+        .not_valid_before(dt.utcnow())
+        .not_valid_after(dt.utcnow() + timedelta(days=365))
+        .add_extension(x509.ExtendedKeyUsage([x509.OID_SERVER_AUTH]), critical=False)
+        .add_extension(
+            x509.SubjectAlternativeName([x509.DNSName(u"*")]), critical=False
+        )
+        .sign(pkey, hashes.SHA256(), default_backend())
+    )
+    return cert, pkey
+
+
+def make_ssl_devcert(base_path, host=None, cn=None):
+    """Creates an SSL key for development.  This should be used instead of
+    the ``'adhoc'`` key which generates a new cert on each server start.
+    It accepts a path for where it should store the key and cert and
+    either a host or CN.  If a host is given it will use the CN
+    ``*.host/CN=host``.
+
+    For more information see :func:`run_simple`.
+
+    .. versionadded:: 0.9
+
+    :param base_path: the path to the certificate and key.  The extension
+                      ``.crt`` is added for the certificate, ``.key`` is
+                      added for the key.
+    :param host: the name of the host.  This can be used as an alternative
+                 for the `cn`.
+    :param cn: the `CN` to use.
+    """
+
+    if host is not None:
+        cn = u"*.%s/CN=%s" % (host, host)
+    cert, pkey = generate_adhoc_ssl_pair(cn=cn)
+
+    from cryptography.hazmat.primitives import serialization
+
+    cert_file = base_path + ".crt"
+    pkey_file = base_path + ".key"
+
+    with open(cert_file, "wb") as f:
+        f.write(cert.public_bytes(serialization.Encoding.PEM))
+    with open(pkey_file, "wb") as f:
+        f.write(
+            pkey.private_bytes(
+                encoding=serialization.Encoding.PEM,
+                format=serialization.PrivateFormat.TraditionalOpenSSL,
+                encryption_algorithm=serialization.NoEncryption(),
+            )
+        )
+
+    return cert_file, pkey_file
+
+
+def generate_adhoc_ssl_context():
+    """Generates an adhoc SSL context for the development server."""
+    import tempfile
+    import atexit
+
+    cert, pkey = generate_adhoc_ssl_pair()
+
+    from cryptography.hazmat.primitives import serialization
+
+    cert_handle, cert_file = tempfile.mkstemp()
+    pkey_handle, pkey_file = tempfile.mkstemp()
+    atexit.register(os.remove, pkey_file)
+    atexit.register(os.remove, cert_file)
+
+    os.write(cert_handle, cert.public_bytes(serialization.Encoding.PEM))
+    os.write(
+        pkey_handle,
+        pkey.private_bytes(
+            encoding=serialization.Encoding.PEM,
+            format=serialization.PrivateFormat.TraditionalOpenSSL,
+            encryption_algorithm=serialization.NoEncryption(),
+        ),
+    )
+
+    os.close(cert_handle)
+    os.close(pkey_handle)
+    ctx = load_ssl_context(cert_file, pkey_file)
+    return ctx
+
+
+def load_ssl_context(cert_file, pkey_file=None, protocol=None):
+    """Loads SSL context from cert/private key files and optional protocol.
+    Many parameters are directly taken from the API of
+    :py:class:`ssl.SSLContext`.
+
+    :param cert_file: Path of the certificate to use.
+    :param pkey_file: Path of the private key to use. If not given, the key
+                      will be obtained from the certificate file.
+    :param protocol: One of the ``PROTOCOL_*`` constants in the stdlib ``ssl``
+                     module. Defaults to ``PROTOCOL_SSLv23``.
+    """
+    if protocol is None:
+        try:
+            protocol = ssl.PROTOCOL_TLS_SERVER
+        except AttributeError:
+            # Python <= 3.5 compat
+            protocol = ssl.PROTOCOL_SSLv23
+    ctx = _SSLContext(protocol)
+    ctx.load_cert_chain(cert_file, pkey_file)
+    return ctx
+
+
+class _SSLContext(object):
+
+    """A dummy class with a small subset of Python3's ``ssl.SSLContext``, only
+    intended to be used with and by Werkzeug."""
+
+    def __init__(self, protocol):
+        self._protocol = protocol
+        self._certfile = None
+        self._keyfile = None
+        self._password = None
+
+    def load_cert_chain(self, certfile, keyfile=None, password=None):
+        self._certfile = certfile
+        self._keyfile = keyfile or certfile
+        self._password = password
+
+    def wrap_socket(self, sock, **kwargs):
+        return ssl.wrap_socket(
+            sock,
+            keyfile=self._keyfile,
+            certfile=self._certfile,
+            ssl_version=self._protocol,
+            **kwargs
+        )
+
+
+def is_ssl_error(error=None):
+    """Checks if the given error (or the current one) is an SSL error."""
+    if error is None:
+        error = sys.exc_info()[1]
+    return isinstance(error, ssl.SSLError)
+
+
+def select_address_family(host, port):
+    """Return ``AF_INET4``, ``AF_INET6``, or ``AF_UNIX`` depending on
+    the host and port."""
+    # disabled due to problems with current ipv6 implementations
+    # and various operating systems.  Probably this code also is
+    # not supposed to work, but I can't come up with any other
+    # ways to implement this.
+    # try:
+    #     info = socket.getaddrinfo(host, port, socket.AF_UNSPEC,
+    #                               socket.SOCK_STREAM, 0,
+    #                               socket.AI_PASSIVE)
+    #     if info:
+    #         return info[0][0]
+    # except socket.gaierror:
+    #     pass
+    if host.startswith("unix://"):
+        return socket.AF_UNIX
+    elif ":" in host and hasattr(socket, "AF_INET6"):
+        return socket.AF_INET6
+    return socket.AF_INET
+
+
+def get_sockaddr(host, port, family):
+    """Return a fully qualified socket address that can be passed to
+    :func:`socket.bind`."""
+    if family == af_unix:
+        return host.split("://", 1)[1]
+    try:
+        res = socket.getaddrinfo(
+            host, port, family, socket.SOCK_STREAM, socket.IPPROTO_TCP
+        )
+    except socket.gaierror:
+        return host, port
+    return res[0][4]
+
+
+class BaseWSGIServer(HTTPServer, object):
+
+    """Simple single-threaded, single-process WSGI server."""
+
+    multithread = False
+    multiprocess = False
+    request_queue_size = LISTEN_QUEUE
+
+    def __init__(
+        self,
+        host,
+        port,
+        app,
+        handler=None,
+        passthrough_errors=False,
+        ssl_context=None,
+        fd=None,
+    ):
+        if handler is None:
+            handler = WSGIRequestHandler
+
+        self.address_family = select_address_family(host, port)
+
+        if fd is not None:
+            real_sock = socket.fromfd(fd, self.address_family, socket.SOCK_STREAM)
+            port = 0
+
+        server_address = get_sockaddr(host, int(port), self.address_family)
+
+        # remove socket file if it already exists
+        if self.address_family == af_unix and os.path.exists(server_address):
+            os.unlink(server_address)
+        HTTPServer.__init__(self, server_address, handler)
+
+        self.app = app
+        self.passthrough_errors = passthrough_errors
+        self.shutdown_signal = False
+        self.host = host
+        self.port = self.socket.getsockname()[1]
+
+        # Patch in the original socket.
+        if fd is not None:
+            self.socket.close()
+            self.socket = real_sock
+            self.server_address = self.socket.getsockname()
+
+        if ssl_context is not None:
+            if isinstance(ssl_context, tuple):
+                ssl_context = load_ssl_context(*ssl_context)
+            if ssl_context == "adhoc":
+                ssl_context = generate_adhoc_ssl_context()
+
+            # If we are on Python 2 the return value from socket.fromfd
+            # is an internal socket object but what we need for ssl wrap
+            # is the wrapper around it :(
+            sock = self.socket
+            if PY2 and not isinstance(sock, socket.socket):
+                sock = socket.socket(sock.family, sock.type, sock.proto, sock)
+            self.socket = ssl_context.wrap_socket(sock, server_side=True)
+            self.ssl_context = ssl_context
+        else:
+            self.ssl_context = None
+
+    def log(self, type, message, *args):
+        _log(type, message, *args)
+
+    def serve_forever(self):
+        self.shutdown_signal = False
+        try:
+            HTTPServer.serve_forever(self)
+        except KeyboardInterrupt:
+            pass
+        finally:
+            self.server_close()
+
+    def handle_error(self, request, client_address):
+        if self.passthrough_errors:
+            raise
+        # Python 2 still causes a socket.error after the earlier
+        # handling, so silence it here.
+        if isinstance(sys.exc_info()[1], _ConnectionError):
+            return
+        return HTTPServer.handle_error(self, request, client_address)
+
+    def get_request(self):
+        con, info = self.socket.accept()
+        return con, info
+
+
+class ThreadedWSGIServer(ThreadingMixIn, BaseWSGIServer):
+
+    """A WSGI server that does threading."""
+
+    multithread = True
+    daemon_threads = True
+
+
+class ForkingWSGIServer(ForkingMixIn, BaseWSGIServer):
+
+    """A WSGI server that does forking."""
+
+    multiprocess = True
+
+    def __init__(
+        self,
+        host,
+        port,
+        app,
+        processes=40,
+        handler=None,
+        passthrough_errors=False,
+        ssl_context=None,
+        fd=None,
+    ):
+        if not can_fork:
+            raise ValueError("Your platform does not support forking.")
+        BaseWSGIServer.__init__(
+            self, host, port, app, handler, passthrough_errors, ssl_context, fd
+        )
+        self.max_children = processes
+
+
+def make_server(
+    host=None,
+    port=None,
+    app=None,
+    threaded=False,
+    processes=1,
+    request_handler=None,
+    passthrough_errors=False,
+    ssl_context=None,
+    fd=None,
+):
+    """Create a new server instance that is either threaded, or forks
+    or just processes one request after another.
+    """
+    if threaded and processes > 1:
+        raise ValueError("cannot have a multithreaded and multi process server.")
+    elif threaded:
+        return ThreadedWSGIServer(
+            host, port, app, request_handler, passthrough_errors, ssl_context, fd=fd
+        )
+    elif processes > 1:
+        return ForkingWSGIServer(
+            host,
+            port,
+            app,
+            processes,
+            request_handler,
+            passthrough_errors,
+            ssl_context,
+            fd=fd,
+        )
+    else:
+        return BaseWSGIServer(
+            host, port, app, request_handler, passthrough_errors, ssl_context, fd=fd
+        )
+
+
+def is_running_from_reloader():
+    """Checks if the application is running from within the Werkzeug
+    reloader subprocess.
+
+    .. versionadded:: 0.10
+    """
+    return os.environ.get("WERKZEUG_RUN_MAIN") == "true"
+
+
+def run_simple(
+    hostname,
+    port,
+    application,
+    use_reloader=False,
+    use_debugger=False,
+    use_evalex=True,
+    extra_files=None,
+    reloader_interval=1,
+    reloader_type="auto",
+    threaded=False,
+    processes=1,
+    request_handler=None,
+    static_files=None,
+    passthrough_errors=False,
+    ssl_context=None,
+):
+    """Start a WSGI application. Optional features include a reloader,
+    multithreading and fork support.
+
+    This function has a command-line interface too::
+
+        python -m werkzeug.serving --help
+
+    .. versionadded:: 0.5
+       `static_files` was added to simplify serving of static files as well
+       as `passthrough_errors`.
+
+    .. versionadded:: 0.6
+       support for SSL was added.
+
+    .. versionadded:: 0.8
+       Added support for automatically loading a SSL context from certificate
+       file and private key.
+
+    .. versionadded:: 0.9
+       Added command-line interface.
+
+    .. versionadded:: 0.10
+       Improved the reloader and added support for changing the backend
+       through the `reloader_type` parameter.  See :ref:`reloader`
+       for more information.
+
+    .. versionchanged:: 0.15
+        Bind to a Unix socket by passing a path that starts with
+        ``unix://`` as the ``hostname``.
+
+    :param hostname: The host to bind to, for example ``'localhost'``.
+        If the value is a path that starts with ``unix://`` it will bind
+        to a Unix socket instead of a TCP socket..
+    :param port: The port for the server.  eg: ``8080``
+    :param application: the WSGI application to execute
+    :param use_reloader: should the server automatically restart the python
+                         process if modules were changed?
+    :param use_debugger: should the werkzeug debugging system be used?
+    :param use_evalex: should the exception evaluation feature be enabled?
+    :param extra_files: a list of files the reloader should watch
+                        additionally to the modules.  For example configuration
+                        files.
+    :param reloader_interval: the interval for the reloader in seconds.
+    :param reloader_type: the type of reloader to use.  The default is
+                          auto detection.  Valid values are ``'stat'`` and
+                          ``'watchdog'``. See :ref:`reloader` for more
+                          information.
+    :param threaded: should the process handle each request in a separate
+                     thread?
+    :param processes: if greater than 1 then handle each request in a new process
+                      up to this maximum number of concurrent processes.
+    :param request_handler: optional parameter that can be used to replace
+                            the default one.  You can use this to replace it
+                            with a different
+                            :class:`~BaseHTTPServer.BaseHTTPRequestHandler`
+                            subclass.
+    :param static_files: a list or dict of paths for static files.  This works
+                         exactly like :class:`SharedDataMiddleware`, it's actually
+                         just wrapping the application in that middleware before
+                         serving.
+    :param passthrough_errors: set this to `True` to disable the error catching.
+                               This means that the server will die on errors but
+                               it can be useful to hook debuggers in (pdb etc.)
+    :param ssl_context: an SSL context for the connection. Either an
+                        :class:`ssl.SSLContext`, a tuple in the form
+                        ``(cert_file, pkey_file)``, the string ``'adhoc'`` if
+                        the server should automatically create one, or ``None``
+                        to disable SSL (which is the default).
+    """
+    if not isinstance(port, int):
+        raise TypeError("port must be an integer")
+    if use_debugger:
+        from .debug import DebuggedApplication
+
+        application = DebuggedApplication(application, use_evalex)
+    if static_files:
+        from .middleware.shared_data import SharedDataMiddleware
+
+        application = SharedDataMiddleware(application, static_files)
+
+    def log_startup(sock):
+        display_hostname = hostname if hostname not in ("", "*") else "localhost"
+        quit_msg = "(Press CTRL+C to quit)"
+        if sock.family == af_unix:
+            _log("info", " * Running on %s %s", display_hostname, quit_msg)
+        else:
+            if ":" in display_hostname:
+                display_hostname = "[%s]" % display_hostname
+            port = sock.getsockname()[1]
+            _log(
+                "info",
+                " * Running on %s://%s:%d/ %s",
+                "http" if ssl_context is None else "https",
+                display_hostname,
+                port,
+                quit_msg,
+            )
+
+    def inner():
+        try:
+            fd = int(os.environ["WERKZEUG_SERVER_FD"])
+        except (LookupError, ValueError):
+            fd = None
+        srv = make_server(
+            hostname,
+            port,
+            application,
+            threaded,
+            processes,
+            request_handler,
+            passthrough_errors,
+            ssl_context,
+            fd=fd,
+        )
+        if fd is None:
+            log_startup(srv.socket)
+        srv.serve_forever()
+
+    if use_reloader:
+        # If we're not running already in the subprocess that is the
+        # reloader we want to open up a socket early to make sure the
+        # port is actually available.
+        if not is_running_from_reloader():
+            if port == 0 and not can_open_by_fd:
+                raise ValueError(
+                    "Cannot bind to a random port with enabled "
+                    "reloader if the Python interpreter does "
+                    "not support socket opening by fd."
+                )
+
+            # Create and destroy a socket so that any exceptions are
+            # raised before we spawn a separate Python interpreter and
+            # lose this ability.
+            address_family = select_address_family(hostname, port)
+            server_address = get_sockaddr(hostname, port, address_family)
+            s = socket.socket(address_family, socket.SOCK_STREAM)
+            s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+            s.bind(server_address)
+            if hasattr(s, "set_inheritable"):
+                s.set_inheritable(True)
+
+            # If we can open the socket by file descriptor, then we can just
+            # reuse this one and our socket will survive the restarts.
+            if can_open_by_fd:
+                os.environ["WERKZEUG_SERVER_FD"] = str(s.fileno())
+                s.listen(LISTEN_QUEUE)
+                log_startup(s)
+            else:
+                s.close()
+                if address_family == af_unix:
+                    _log("info", "Unlinking %s" % server_address)
+                    os.unlink(server_address)
+
+        # Do not use relative imports, otherwise "python -m werkzeug.serving"
+        # breaks.
+        from ._reloader import run_with_reloader
+
+        run_with_reloader(inner, extra_files, reloader_interval, reloader_type)
+    else:
+        inner()
+
+
+def run_with_reloader(*args, **kwargs):
+    # People keep using undocumented APIs.  Do not use this function
+    # please, we do not guarantee that it continues working.
+    from ._reloader import run_with_reloader
+
+    return run_with_reloader(*args, **kwargs)
+
+
+def main():
+    """A simple command-line interface for :py:func:`run_simple`."""
+
+    # in contrast to argparse, this works at least under Python < 2.7
+    import optparse
+    from .utils import import_string
+
+    parser = optparse.OptionParser(usage="Usage: %prog [options] app_module:app_object")
+    parser.add_option(
+        "-b",
+        "--bind",
+        dest="address",
+        help="The hostname:port the app should listen on.",
+    )
+    parser.add_option(
+        "-d",
+        "--debug",
+        dest="use_debugger",
+        action="store_true",
+        default=False,
+        help="Use Werkzeug's debugger.",
+    )
+    parser.add_option(
+        "-r",
+        "--reload",
+        dest="use_reloader",
+        action="store_true",
+        default=False,
+        help="Reload Python process if modules change.",
+    )
+    options, args = parser.parse_args()
+
+    hostname, port = None, None
+    if options.address:
+        address = options.address.split(":")
+        hostname = address[0]
+        if len(address) > 1:
+            port = address[1]
+
+    if len(args) != 1:
+        sys.stdout.write("No application supplied, or too much. See --help\n")
+        sys.exit(1)
+    app = import_string(args[0])
+
+    run_simple(
+        hostname=(hostname or "127.0.0.1"),
+        port=int(port or 5000),
+        application=app,
+        use_reloader=options.use_reloader,
+        use_debugger=options.use_debugger,
+    )
+
+
+if __name__ == "__main__":
+    main()
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/test.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/test.py
new file mode 100644
index 0000000..c5ce50a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/test.py
@@ -0,0 +1,1123 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.test
+    ~~~~~~~~~~~~~
+
+    This module implements a client to WSGI applications for testing.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import mimetypes
+import sys
+from io import BytesIO
+from itertools import chain
+from random import random
+from tempfile import TemporaryFile
+from time import time
+
+from ._compat import iteritems
+from ._compat import iterlists
+from ._compat import itervalues
+from ._compat import make_literal_wrapper
+from ._compat import reraise
+from ._compat import string_types
+from ._compat import text_type
+from ._compat import to_bytes
+from ._compat import wsgi_encoding_dance
+from ._internal import _get_environ
+from .datastructures import CallbackDict
+from .datastructures import CombinedMultiDict
+from .datastructures import EnvironHeaders
+from .datastructures import FileMultiDict
+from .datastructures import Headers
+from .datastructures import MultiDict
+from .http import dump_cookie
+from .http import dump_options_header
+from .http import parse_options_header
+from .urls import iri_to_uri
+from .urls import url_encode
+from .urls import url_fix
+from .urls import url_parse
+from .urls import url_unparse
+from .urls import url_unquote
+from .utils import get_content_type
+from .wrappers import BaseRequest
+from .wsgi import ClosingIterator
+from .wsgi import get_current_url
+
+try:
+    from urllib.request import Request as U2Request
+except ImportError:
+    from urllib2 import Request as U2Request
+
+try:
+    from http.cookiejar import CookieJar
+except ImportError:
+    from cookielib import CookieJar
+
+
+def stream_encode_multipart(
+    values, use_tempfile=True, threshold=1024 * 500, boundary=None, charset="utf-8"
+):
+    """Encode a dict of values (either strings or file descriptors or
+    :class:`FileStorage` objects.) into a multipart encoded string stored
+    in a file descriptor.
+    """
+    if boundary is None:
+        boundary = "---------------WerkzeugFormPart_%s%s" % (time(), random())
+    _closure = [BytesIO(), 0, False]
+
+    if use_tempfile:
+
+        def write_binary(string):
+            stream, total_length, on_disk = _closure
+            if on_disk:
+                stream.write(string)
+            else:
+                length = len(string)
+                if length + _closure[1] <= threshold:
+                    stream.write(string)
+                else:
+                    new_stream = TemporaryFile("wb+")
+                    new_stream.write(stream.getvalue())
+                    new_stream.write(string)
+                    _closure[0] = new_stream
+                    _closure[2] = True
+                _closure[1] = total_length + length
+
+    else:
+        write_binary = _closure[0].write
+
+    def write(string):
+        write_binary(string.encode(charset))
+
+    if not isinstance(values, MultiDict):
+        values = MultiDict(values)
+
+    for key, values in iterlists(values):
+        for value in values:
+            write('--%s\r\nContent-Disposition: form-data; name="%s"' % (boundary, key))
+            reader = getattr(value, "read", None)
+            if reader is not None:
+                filename = getattr(value, "filename", getattr(value, "name", None))
+                content_type = getattr(value, "content_type", None)
+                if content_type is None:
+                    content_type = (
+                        filename
+                        and mimetypes.guess_type(filename)[0]
+                        or "application/octet-stream"
+                    )
+                if filename is not None:
+                    write('; filename="%s"\r\n' % filename)
+                else:
+                    write("\r\n")
+                write("Content-Type: %s\r\n\r\n" % content_type)
+                while 1:
+                    chunk = reader(16384)
+                    if not chunk:
+                        break
+                    write_binary(chunk)
+            else:
+                if not isinstance(value, string_types):
+                    value = str(value)
+
+                value = to_bytes(value, charset)
+                write("\r\n\r\n")
+                write_binary(value)
+            write("\r\n")
+    write("--%s--\r\n" % boundary)
+
+    length = int(_closure[0].tell())
+    _closure[0].seek(0)
+    return _closure[0], length, boundary
+
+
+def encode_multipart(values, boundary=None, charset="utf-8"):
+    """Like `stream_encode_multipart` but returns a tuple in the form
+    (``boundary``, ``data``) where data is a bytestring.
+    """
+    stream, length, boundary = stream_encode_multipart(
+        values, use_tempfile=False, boundary=boundary, charset=charset
+    )
+    return boundary, stream.read()
+
+
+class _TestCookieHeaders(object):
+
+    """A headers adapter for cookielib
+    """
+
+    def __init__(self, headers):
+        self.headers = headers
+
+    def getheaders(self, name):
+        headers = []
+        name = name.lower()
+        for k, v in self.headers:
+            if k.lower() == name:
+                headers.append(v)
+        return headers
+
+    def get_all(self, name, default=None):
+        rv = []
+        for k, v in self.headers:
+            if k.lower() == name.lower():
+                rv.append(v)
+        return rv or default or []
+
+
+class _TestCookieResponse(object):
+
+    """Something that looks like a httplib.HTTPResponse, but is actually just an
+    adapter for our test responses to make them available for cookielib.
+    """
+
+    def __init__(self, headers):
+        self.headers = _TestCookieHeaders(headers)
+
+    def info(self):
+        return self.headers
+
+
+class _TestCookieJar(CookieJar):
+
+    """A cookielib.CookieJar modified to inject and read cookie headers from
+    and to wsgi environments, and wsgi application responses.
+    """
+
+    def inject_wsgi(self, environ):
+        """Inject the cookies as client headers into the server's wsgi
+        environment.
+        """
+        cvals = ["%s=%s" % (c.name, c.value) for c in self]
+
+        if cvals:
+            environ["HTTP_COOKIE"] = "; ".join(cvals)
+        else:
+            environ.pop("HTTP_COOKIE", None)
+
+    def extract_wsgi(self, environ, headers):
+        """Extract the server's set-cookie headers as cookies into the
+        cookie jar.
+        """
+        self.extract_cookies(
+            _TestCookieResponse(headers), U2Request(get_current_url(environ))
+        )
+
+
+def _iter_data(data):
+    """Iterates over a `dict` or :class:`MultiDict` yielding all keys and
+    values.
+    This is used to iterate over the data passed to the
+    :class:`EnvironBuilder`.
+    """
+    if isinstance(data, MultiDict):
+        for key, values in iterlists(data):
+            for value in values:
+                yield key, value
+    else:
+        for key, values in iteritems(data):
+            if isinstance(values, list):
+                for value in values:
+                    yield key, value
+            else:
+                yield key, values
+
+
+class EnvironBuilder(object):
+    """This class can be used to conveniently create a WSGI environment
+    for testing purposes.  It can be used to quickly create WSGI environments
+    or request objects from arbitrary data.
+
+    The signature of this class is also used in some other places as of
+    Werkzeug 0.5 (:func:`create_environ`, :meth:`BaseResponse.from_values`,
+    :meth:`Client.open`).  Because of this most of the functionality is
+    available through the constructor alone.
+
+    Files and regular form data can be manipulated independently of each
+    other with the :attr:`form` and :attr:`files` attributes, but are
+    passed with the same argument to the constructor: `data`.
+
+    `data` can be any of these values:
+
+    -   a `str` or `bytes` object: The object is converted into an
+        :attr:`input_stream`, the :attr:`content_length` is set and you have to
+        provide a :attr:`content_type`.
+    -   a `dict` or :class:`MultiDict`: The keys have to be strings. The values
+        have to be either any of the following objects, or a list of any of the
+        following objects:
+
+        -   a :class:`file`-like object:  These are converted into
+            :class:`FileStorage` objects automatically.
+        -   a `tuple`:  The :meth:`~FileMultiDict.add_file` method is called
+            with the key and the unpacked `tuple` items as positional
+            arguments.
+        -   a `str`:  The string is set as form data for the associated key.
+    -   a file-like object: The object content is loaded in memory and then
+        handled like a regular `str` or a `bytes`.
+
+    :param path: the path of the request.  In the WSGI environment this will
+                 end up as `PATH_INFO`.  If the `query_string` is not defined
+                 and there is a question mark in the `path` everything after
+                 it is used as query string.
+    :param base_url: the base URL is a URL that is used to extract the WSGI
+                     URL scheme, host (server name + server port) and the
+                     script root (`SCRIPT_NAME`).
+    :param query_string: an optional string or dict with URL parameters.
+    :param method: the HTTP method to use, defaults to `GET`.
+    :param input_stream: an optional input stream.  Do not specify this and
+                         `data`.  As soon as an input stream is set you can't
+                         modify :attr:`args` and :attr:`files` unless you
+                         set the :attr:`input_stream` to `None` again.
+    :param content_type: The content type for the request.  As of 0.5 you
+                         don't have to provide this when specifying files
+                         and form data via `data`.
+    :param content_length: The content length for the request.  You don't
+                           have to specify this when providing data via
+                           `data`.
+    :param errors_stream: an optional error stream that is used for
+                          `wsgi.errors`.  Defaults to :data:`stderr`.
+    :param multithread: controls `wsgi.multithread`.  Defaults to `False`.
+    :param multiprocess: controls `wsgi.multiprocess`.  Defaults to `False`.
+    :param run_once: controls `wsgi.run_once`.  Defaults to `False`.
+    :param headers: an optional list or :class:`Headers` object of headers.
+    :param data: a string or dict of form data or a file-object.
+                 See explanation above.
+    :param json: An object to be serialized and assigned to ``data``.
+        Defaults the content type to ``"application/json"``.
+        Serialized with the function assigned to :attr:`json_dumps`.
+    :param environ_base: an optional dict of environment defaults.
+    :param environ_overrides: an optional dict of environment overrides.
+    :param charset: the charset used to encode unicode data.
+
+    .. versionadded:: 0.15
+        The ``json`` param and :meth:`json_dumps` method.
+
+    .. versionadded:: 0.15
+        The environ has keys ``REQUEST_URI`` and ``RAW_URI`` containing
+        the path before perecent-decoding. This is not part of the WSGI
+        PEP, but many WSGI servers include it.
+
+    .. versionchanged:: 0.6
+       ``path`` and ``base_url`` can now be unicode strings that are
+       encoded with :func:`iri_to_uri`.
+    """
+
+    #: the server protocol to use.  defaults to HTTP/1.1
+    server_protocol = "HTTP/1.1"
+
+    #: the wsgi version to use.  defaults to (1, 0)
+    wsgi_version = (1, 0)
+
+    #: the default request class for :meth:`get_request`
+    request_class = BaseRequest
+
+    import json
+
+    #: The serialization function used when ``json`` is passed.
+    json_dumps = staticmethod(json.dumps)
+    del json
+
+    def __init__(
+        self,
+        path="/",
+        base_url=None,
+        query_string=None,
+        method="GET",
+        input_stream=None,
+        content_type=None,
+        content_length=None,
+        errors_stream=None,
+        multithread=False,
+        multiprocess=False,
+        run_once=False,
+        headers=None,
+        data=None,
+        environ_base=None,
+        environ_overrides=None,
+        charset="utf-8",
+        mimetype=None,
+        json=None,
+    ):
+        path_s = make_literal_wrapper(path)
+        if query_string is not None and path_s("?") in path:
+            raise ValueError("Query string is defined in the path and as an argument")
+        if query_string is None and path_s("?") in path:
+            path, query_string = path.split(path_s("?"), 1)
+        self.charset = charset
+        self.path = iri_to_uri(path)
+        if base_url is not None:
+            base_url = url_fix(iri_to_uri(base_url, charset), charset)
+        self.base_url = base_url
+        if isinstance(query_string, (bytes, text_type)):
+            self.query_string = query_string
+        else:
+            if query_string is None:
+                query_string = MultiDict()
+            elif not isinstance(query_string, MultiDict):
+                query_string = MultiDict(query_string)
+            self.args = query_string
+        self.method = method
+        if headers is None:
+            headers = Headers()
+        elif not isinstance(headers, Headers):
+            headers = Headers(headers)
+        self.headers = headers
+        if content_type is not None:
+            self.content_type = content_type
+        if errors_stream is None:
+            errors_stream = sys.stderr
+        self.errors_stream = errors_stream
+        self.multithread = multithread
+        self.multiprocess = multiprocess
+        self.run_once = run_once
+        self.environ_base = environ_base
+        self.environ_overrides = environ_overrides
+        self.input_stream = input_stream
+        self.content_length = content_length
+        self.closed = False
+
+        if json is not None:
+            if data is not None:
+                raise TypeError("can't provide both json and data")
+
+            data = self.json_dumps(json)
+
+            if self.content_type is None:
+                self.content_type = "application/json"
+
+        if data:
+            if input_stream is not None:
+                raise TypeError("can't provide input stream and data")
+            if hasattr(data, "read"):
+                data = data.read()
+            if isinstance(data, text_type):
+                data = data.encode(self.charset)
+            if isinstance(data, bytes):
+                self.input_stream = BytesIO(data)
+                if self.content_length is None:
+                    self.content_length = len(data)
+            else:
+                for key, value in _iter_data(data):
+                    if isinstance(value, (tuple, dict)) or hasattr(value, "read"):
+                        self._add_file_from_data(key, value)
+                    else:
+                        self.form.setlistdefault(key).append(value)
+
+        if mimetype is not None:
+            self.mimetype = mimetype
+
+    @classmethod
+    def from_environ(cls, environ, **kwargs):
+        """Turn an environ dict back into a builder. Any extra kwargs
+        override the args extracted from the environ.
+
+        .. versionadded:: 0.15
+        """
+        headers = Headers(EnvironHeaders(environ))
+        out = {
+            "path": environ["PATH_INFO"],
+            "base_url": cls._make_base_url(
+                environ["wsgi.url_scheme"], headers.pop("Host"), environ["SCRIPT_NAME"]
+            ),
+            "query_string": environ["QUERY_STRING"],
+            "method": environ["REQUEST_METHOD"],
+            "input_stream": environ["wsgi.input"],
+            "content_type": headers.pop("Content-Type", None),
+            "content_length": headers.pop("Content-Length", None),
+            "errors_stream": environ["wsgi.errors"],
+            "multithread": environ["wsgi.multithread"],
+            "multiprocess": environ["wsgi.multiprocess"],
+            "run_once": environ["wsgi.run_once"],
+            "headers": headers,
+        }
+        out.update(kwargs)
+        return cls(**out)
+
+    def _add_file_from_data(self, key, value):
+        """Called in the EnvironBuilder to add files from the data dict."""
+        if isinstance(value, tuple):
+            self.files.add_file(key, *value)
+        else:
+            self.files.add_file(key, value)
+
+    @staticmethod
+    def _make_base_url(scheme, host, script_root):
+        return url_unparse((scheme, host, script_root, "", "")).rstrip("/") + "/"
+
+    @property
+    def base_url(self):
+        """The base URL is used to extract the URL scheme, host name,
+        port, and root path.
+        """
+        return self._make_base_url(self.url_scheme, self.host, self.script_root)
+
+    @base_url.setter
+    def base_url(self, value):
+        if value is None:
+            scheme = "http"
+            netloc = "localhost"
+            script_root = ""
+        else:
+            scheme, netloc, script_root, qs, anchor = url_parse(value)
+            if qs or anchor:
+                raise ValueError("base url must not contain a query string or fragment")
+        self.script_root = script_root.rstrip("/")
+        self.host = netloc
+        self.url_scheme = scheme
+
+    @property
+    def content_type(self):
+        """The content type for the request.  Reflected from and to
+        the :attr:`headers`.  Do not set if you set :attr:`files` or
+        :attr:`form` for auto detection.
+        """
+        ct = self.headers.get("Content-Type")
+        if ct is None and not self._input_stream:
+            if self._files:
+                return "multipart/form-data"
+            if self._form:
+                return "application/x-www-form-urlencoded"
+            return None
+        return ct
+
+    @content_type.setter
+    def content_type(self, value):
+        if value is None:
+            self.headers.pop("Content-Type", None)
+        else:
+            self.headers["Content-Type"] = value
+
+    @property
+    def mimetype(self):
+        """The mimetype (content type without charset etc.)
+
+        .. versionadded:: 0.14
+        """
+        ct = self.content_type
+        return ct.split(";")[0].strip() if ct else None
+
+    @mimetype.setter
+    def mimetype(self, value):
+        self.content_type = get_content_type(value, self.charset)
+
+    @property
+    def mimetype_params(self):
+        """ The mimetype parameters as dict.  For example if the
+        content type is ``text/html; charset=utf-8`` the params would be
+        ``{'charset': 'utf-8'}``.
+
+        .. versionadded:: 0.14
+        """
+
+        def on_update(d):
+            self.headers["Content-Type"] = dump_options_header(self.mimetype, d)
+
+        d = parse_options_header(self.headers.get("content-type", ""))[1]
+        return CallbackDict(d, on_update)
+
+    @property
+    def content_length(self):
+        """The content length as integer.  Reflected from and to the
+        :attr:`headers`.  Do not set if you set :attr:`files` or
+        :attr:`form` for auto detection.
+        """
+        return self.headers.get("Content-Length", type=int)
+
+    @content_length.setter
+    def content_length(self, value):
+        if value is None:
+            self.headers.pop("Content-Length", None)
+        else:
+            self.headers["Content-Length"] = str(value)
+
+    def _get_form(self, name, storage):
+        """Common behavior for getting the :attr:`form` and
+        :attr:`files` properties.
+
+        :param name: Name of the internal cached attribute.
+        :param storage: Storage class used for the data.
+        """
+        if self.input_stream is not None:
+            raise AttributeError("an input stream is defined")
+
+        rv = getattr(self, name)
+
+        if rv is None:
+            rv = storage()
+            setattr(self, name, rv)
+
+        return rv
+
+    def _set_form(self, name, value):
+        """Common behavior for setting the :attr:`form` and
+        :attr:`files` properties.
+
+        :param name: Name of the internal cached attribute.
+        :param value: Value to assign to the attribute.
+        """
+        self._input_stream = None
+        setattr(self, name, value)
+
+    @property
+    def form(self):
+        """A :class:`MultiDict` of form values."""
+        return self._get_form("_form", MultiDict)
+
+    @form.setter
+    def form(self, value):
+        self._set_form("_form", value)
+
+    @property
+    def files(self):
+        """A :class:`FileMultiDict` of uploaded files. Use
+        :meth:`~FileMultiDict.add_file` to add new files.
+        """
+        return self._get_form("_files", FileMultiDict)
+
+    @files.setter
+    def files(self, value):
+        self._set_form("_files", value)
+
+    @property
+    def input_stream(self):
+        """An optional input stream.  If you set this it will clear
+        :attr:`form` and :attr:`files`.
+        """
+        return self._input_stream
+
+    @input_stream.setter
+    def input_stream(self, value):
+        self._input_stream = value
+        self._form = None
+        self._files = None
+
+    @property
+    def query_string(self):
+        """The query string.  If you set this to a string
+        :attr:`args` will no longer be available.
+        """
+        if self._query_string is None:
+            if self._args is not None:
+                return url_encode(self._args, charset=self.charset)
+            return ""
+        return self._query_string
+
+    @query_string.setter
+    def query_string(self, value):
+        self._query_string = value
+        self._args = None
+
+    @property
+    def args(self):
+        """The URL arguments as :class:`MultiDict`."""
+        if self._query_string is not None:
+            raise AttributeError("a query string is defined")
+        if self._args is None:
+            self._args = MultiDict()
+        return self._args
+
+    @args.setter
+    def args(self, value):
+        self._query_string = None
+        self._args = value
+
+    @property
+    def server_name(self):
+        """The server name (read-only, use :attr:`host` to set)"""
+        return self.host.split(":", 1)[0]
+
+    @property
+    def server_port(self):
+        """The server port as integer (read-only, use :attr:`host` to set)"""
+        pieces = self.host.split(":", 1)
+        if len(pieces) == 2 and pieces[1].isdigit():
+            return int(pieces[1])
+        if self.url_scheme == "https":
+            return 443
+        return 80
+
+    def __del__(self):
+        try:
+            self.close()
+        except Exception:
+            pass
+
+    def close(self):
+        """Closes all files.  If you put real :class:`file` objects into the
+        :attr:`files` dict you can call this method to automatically close
+        them all in one go.
+        """
+        if self.closed:
+            return
+        try:
+            files = itervalues(self.files)
+        except AttributeError:
+            files = ()
+        for f in files:
+            try:
+                f.close()
+            except Exception:
+                pass
+        self.closed = True
+
+    def get_environ(self):
+        """Return the built environ.
+
+        .. versionchanged:: 0.15
+            The content type and length headers are set based on
+            input stream detection. Previously this only set the WSGI
+            keys.
+        """
+        input_stream = self.input_stream
+        content_length = self.content_length
+
+        mimetype = self.mimetype
+        content_type = self.content_type
+
+        if input_stream is not None:
+            start_pos = input_stream.tell()
+            input_stream.seek(0, 2)
+            end_pos = input_stream.tell()
+            input_stream.seek(start_pos)
+            content_length = end_pos - start_pos
+        elif mimetype == "multipart/form-data":
+            values = CombinedMultiDict([self.form, self.files])
+            input_stream, content_length, boundary = stream_encode_multipart(
+                values, charset=self.charset
+            )
+            content_type = mimetype + '; boundary="%s"' % boundary
+        elif mimetype == "application/x-www-form-urlencoded":
+            # XXX: py2v3 review
+            values = url_encode(self.form, charset=self.charset)
+            values = values.encode("ascii")
+            content_length = len(values)
+            input_stream = BytesIO(values)
+        else:
+            input_stream = BytesIO()
+
+        result = {}
+        if self.environ_base:
+            result.update(self.environ_base)
+
+        def _path_encode(x):
+            return wsgi_encoding_dance(url_unquote(x, self.charset), self.charset)
+
+        qs = wsgi_encoding_dance(self.query_string)
+
+        result.update(
+            {
+                "REQUEST_METHOD": self.method,
+                "SCRIPT_NAME": _path_encode(self.script_root),
+                "PATH_INFO": _path_encode(self.path),
+                "QUERY_STRING": qs,
+                # Non-standard, added by mod_wsgi, uWSGI
+                "REQUEST_URI": wsgi_encoding_dance(self.path),
+                # Non-standard, added by gunicorn
+                "RAW_URI": wsgi_encoding_dance(self.path),
+                "SERVER_NAME": self.server_name,
+                "SERVER_PORT": str(self.server_port),
+                "HTTP_HOST": self.host,
+                "SERVER_PROTOCOL": self.server_protocol,
+                "wsgi.version": self.wsgi_version,
+                "wsgi.url_scheme": self.url_scheme,
+                "wsgi.input": input_stream,
+                "wsgi.errors": self.errors_stream,
+                "wsgi.multithread": self.multithread,
+                "wsgi.multiprocess": self.multiprocess,
+                "wsgi.run_once": self.run_once,
+            }
+        )
+
+        headers = self.headers.copy()
+
+        if content_type is not None:
+            result["CONTENT_TYPE"] = content_type
+            headers.set("Content-Type", content_type)
+
+        if content_length is not None:
+            result["CONTENT_LENGTH"] = str(content_length)
+            headers.set("Content-Length", content_length)
+
+        for key, value in headers.to_wsgi_list():
+            result["HTTP_%s" % key.upper().replace("-", "_")] = value
+
+        if self.environ_overrides:
+            result.update(self.environ_overrides)
+
+        return result
+
+    def get_request(self, cls=None):
+        """Returns a request with the data.  If the request class is not
+        specified :attr:`request_class` is used.
+
+        :param cls: The request wrapper to use.
+        """
+        if cls is None:
+            cls = self.request_class
+        return cls(self.get_environ())
+
+
+class ClientRedirectError(Exception):
+    """If a redirect loop is detected when using follow_redirects=True with
+    the :cls:`Client`, then this exception is raised.
+    """
+
+
+class Client(object):
+    """This class allows you to send requests to a wrapped application.
+
+    The response wrapper can be a class or factory function that takes
+    three arguments: app_iter, status and headers.  The default response
+    wrapper just returns a tuple.
+
+    Example::
+
+        class ClientResponse(BaseResponse):
+            ...
+
+        client = Client(MyApplication(), response_wrapper=ClientResponse)
+
+    The use_cookies parameter indicates whether cookies should be stored and
+    sent for subsequent requests. This is True by default, but passing False
+    will disable this behaviour.
+
+    If you want to request some subdomain of your application you may set
+    `allow_subdomain_redirects` to `True` as if not no external redirects
+    are allowed.
+
+    .. versionadded:: 0.5
+       `use_cookies` is new in this version.  Older versions did not provide
+       builtin cookie support.
+
+    .. versionadded:: 0.14
+       The `mimetype` parameter was added.
+
+    .. versionadded:: 0.15
+        The ``json`` parameter.
+    """
+
+    def __init__(
+        self,
+        application,
+        response_wrapper=None,
+        use_cookies=True,
+        allow_subdomain_redirects=False,
+    ):
+        self.application = application
+        self.response_wrapper = response_wrapper
+        if use_cookies:
+            self.cookie_jar = _TestCookieJar()
+        else:
+            self.cookie_jar = None
+        self.allow_subdomain_redirects = allow_subdomain_redirects
+
+    def set_cookie(
+        self,
+        server_name,
+        key,
+        value="",
+        max_age=None,
+        expires=None,
+        path="/",
+        domain=None,
+        secure=None,
+        httponly=False,
+        samesite=None,
+        charset="utf-8",
+    ):
+        """Sets a cookie in the client's cookie jar.  The server name
+        is required and has to match the one that is also passed to
+        the open call.
+        """
+        assert self.cookie_jar is not None, "cookies disabled"
+        header = dump_cookie(
+            key,
+            value,
+            max_age,
+            expires,
+            path,
+            domain,
+            secure,
+            httponly,
+            charset,
+            samesite=samesite,
+        )
+        environ = create_environ(path, base_url="http://" + server_name)
+        headers = [("Set-Cookie", header)]
+        self.cookie_jar.extract_wsgi(environ, headers)
+
+    def delete_cookie(self, server_name, key, path="/", domain=None):
+        """Deletes a cookie in the test client."""
+        self.set_cookie(
+            server_name, key, expires=0, max_age=0, path=path, domain=domain
+        )
+
+    def run_wsgi_app(self, environ, buffered=False):
+        """Runs the wrapped WSGI app with the given environment."""
+        if self.cookie_jar is not None:
+            self.cookie_jar.inject_wsgi(environ)
+        rv = run_wsgi_app(self.application, environ, buffered=buffered)
+        if self.cookie_jar is not None:
+            self.cookie_jar.extract_wsgi(environ, rv[2])
+        return rv
+
+    def resolve_redirect(self, response, new_location, environ, buffered=False):
+        """Perform a new request to the location given by the redirect
+        response to the previous request.
+        """
+        scheme, netloc, path, qs, anchor = url_parse(new_location)
+        builder = EnvironBuilder.from_environ(environ, query_string=qs)
+
+        to_name_parts = netloc.split(":", 1)[0].split(".")
+        from_name_parts = builder.server_name.split(".")
+
+        if to_name_parts != [""]:
+            # The new location has a host, use it for the base URL.
+            builder.url_scheme = scheme
+            builder.host = netloc
+        else:
+            # A local redirect with autocorrect_location_header=False
+            # doesn't have a host, so use the request's host.
+            to_name_parts = from_name_parts
+
+        # Explain why a redirect to a different server name won't be followed.
+        if to_name_parts != from_name_parts:
+            if to_name_parts[-len(from_name_parts) :] == from_name_parts:
+                if not self.allow_subdomain_redirects:
+                    raise RuntimeError("Following subdomain redirects is not enabled.")
+            else:
+                raise RuntimeError("Following external redirects is not supported.")
+
+        path_parts = path.split("/")
+        root_parts = builder.script_root.split("/")
+
+        if path_parts[: len(root_parts)] == root_parts:
+            # Strip the script root from the path.
+            builder.path = path[len(builder.script_root) :]
+        else:
+            # The new location is not under the script root, so use the
+            # whole path and clear the previous root.
+            builder.path = path
+            builder.script_root = ""
+
+        status_code = int(response[1].split(None, 1)[0])
+
+        # Only 307 and 308 preserve all of the original request.
+        if status_code not in {307, 308}:
+            # HEAD is preserved, everything else becomes GET.
+            if builder.method != "HEAD":
+                builder.method = "GET"
+
+            # Clear the body and the headers that describe it.
+            builder.input_stream = None
+            builder.content_type = None
+            builder.content_length = None
+            builder.headers.pop("Transfer-Encoding", None)
+
+        # Disable the response wrapper while handling redirects. Not
+        # thread safe, but the client should not be shared anyway.
+        old_response_wrapper = self.response_wrapper
+        self.response_wrapper = None
+
+        try:
+            return self.open(builder, as_tuple=True, buffered=buffered)
+        finally:
+            self.response_wrapper = old_response_wrapper
+
+    def open(self, *args, **kwargs):
+        """Takes the same arguments as the :class:`EnvironBuilder` class with
+        some additions:  You can provide a :class:`EnvironBuilder` or a WSGI
+        environment as only argument instead of the :class:`EnvironBuilder`
+        arguments and two optional keyword arguments (`as_tuple`, `buffered`)
+        that change the type of the return value or the way the application is
+        executed.
+
+        .. versionchanged:: 0.5
+           If a dict is provided as file in the dict for the `data` parameter
+           the content type has to be called `content_type` now instead of
+           `mimetype`.  This change was made for consistency with
+           :class:`werkzeug.FileWrapper`.
+
+            The `follow_redirects` parameter was added to :func:`open`.
+
+        Additional parameters:
+
+        :param as_tuple: Returns a tuple in the form ``(environ, result)``
+        :param buffered: Set this to True to buffer the application run.
+                         This will automatically close the application for
+                         you as well.
+        :param follow_redirects: Set this to True if the `Client` should
+                                 follow HTTP redirects.
+        """
+        as_tuple = kwargs.pop("as_tuple", False)
+        buffered = kwargs.pop("buffered", False)
+        follow_redirects = kwargs.pop("follow_redirects", False)
+        environ = None
+        if not kwargs and len(args) == 1:
+            if isinstance(args[0], EnvironBuilder):
+                environ = args[0].get_environ()
+            elif isinstance(args[0], dict):
+                environ = args[0]
+        if environ is None:
+            builder = EnvironBuilder(*args, **kwargs)
+            try:
+                environ = builder.get_environ()
+            finally:
+                builder.close()
+
+        response = self.run_wsgi_app(environ.copy(), buffered=buffered)
+
+        # handle redirects
+        redirect_chain = []
+        while 1:
+            status_code = int(response[1].split(None, 1)[0])
+            if (
+                status_code not in {301, 302, 303, 305, 307, 308}
+                or not follow_redirects
+            ):
+                break
+
+            # Exhaust intermediate response bodies to ensure middleware
+            # that returns an iterator runs any cleanup code.
+            if not buffered:
+                for _ in response[0]:
+                    pass
+
+            new_location = response[2]["location"]
+            new_redirect_entry = (new_location, status_code)
+            if new_redirect_entry in redirect_chain:
+                raise ClientRedirectError("loop detected")
+            redirect_chain.append(new_redirect_entry)
+            environ, response = self.resolve_redirect(
+                response, new_location, environ, buffered=buffered
+            )
+
+        if self.response_wrapper is not None:
+            response = self.response_wrapper(*response)
+        if as_tuple:
+            return environ, response
+        return response
+
+    def get(self, *args, **kw):
+        """Like open but method is enforced to GET."""
+        kw["method"] = "GET"
+        return self.open(*args, **kw)
+
+    def patch(self, *args, **kw):
+        """Like open but method is enforced to PATCH."""
+        kw["method"] = "PATCH"
+        return self.open(*args, **kw)
+
+    def post(self, *args, **kw):
+        """Like open but method is enforced to POST."""
+        kw["method"] = "POST"
+        return self.open(*args, **kw)
+
+    def head(self, *args, **kw):
+        """Like open but method is enforced to HEAD."""
+        kw["method"] = "HEAD"
+        return self.open(*args, **kw)
+
+    def put(self, *args, **kw):
+        """Like open but method is enforced to PUT."""
+        kw["method"] = "PUT"
+        return self.open(*args, **kw)
+
+    def delete(self, *args, **kw):
+        """Like open but method is enforced to DELETE."""
+        kw["method"] = "DELETE"
+        return self.open(*args, **kw)
+
+    def options(self, *args, **kw):
+        """Like open but method is enforced to OPTIONS."""
+        kw["method"] = "OPTIONS"
+        return self.open(*args, **kw)
+
+    def trace(self, *args, **kw):
+        """Like open but method is enforced to TRACE."""
+        kw["method"] = "TRACE"
+        return self.open(*args, **kw)
+
+    def __repr__(self):
+        return "<%s %r>" % (self.__class__.__name__, self.application)
+
+
+def create_environ(*args, **kwargs):
+    """Create a new WSGI environ dict based on the values passed.  The first
+    parameter should be the path of the request which defaults to '/'.  The
+    second one can either be an absolute path (in that case the host is
+    localhost:80) or a full path to the request with scheme, netloc port and
+    the path to the script.
+
+    This accepts the same arguments as the :class:`EnvironBuilder`
+    constructor.
+
+    .. versionchanged:: 0.5
+       This function is now a thin wrapper over :class:`EnvironBuilder` which
+       was added in 0.5.  The `headers`, `environ_base`, `environ_overrides`
+       and `charset` parameters were added.
+    """
+    builder = EnvironBuilder(*args, **kwargs)
+    try:
+        return builder.get_environ()
+    finally:
+        builder.close()
+
+
+def run_wsgi_app(app, environ, buffered=False):
+    """Return a tuple in the form (app_iter, status, headers) of the
+    application output.  This works best if you pass it an application that
+    returns an iterator all the time.
+
+    Sometimes applications may use the `write()` callable returned
+    by the `start_response` function.  This tries to resolve such edge
+    cases automatically.  But if you don't get the expected output you
+    should set `buffered` to `True` which enforces buffering.
+
+    If passed an invalid WSGI application the behavior of this function is
+    undefined.  Never pass non-conforming WSGI applications to this function.
+
+    :param app: the application to execute.
+    :param buffered: set to `True` to enforce buffering.
+    :return: tuple in the form ``(app_iter, status, headers)``
+    """
+    environ = _get_environ(environ)
+    response = []
+    buffer = []
+
+    def start_response(status, headers, exc_info=None):
+        if exc_info is not None:
+            reraise(*exc_info)
+        response[:] = [status, headers]
+        return buffer.append
+
+    app_rv = app(environ, start_response)
+    close_func = getattr(app_rv, "close", None)
+    app_iter = iter(app_rv)
+
+    # when buffering we emit the close call early and convert the
+    # application iterator into a regular list
+    if buffered:
+        try:
+            app_iter = list(app_iter)
+        finally:
+            if close_func is not None:
+                close_func()
+
+    # otherwise we iterate the application iter until we have a response, chain
+    # the already received data with the already collected data and wrap it in
+    # a new `ClosingIterator` if we need to restore a `close` callable from the
+    # original return value.
+    else:
+        for item in app_iter:
+            buffer.append(item)
+            if response:
+                break
+        if buffer:
+            app_iter = chain(buffer, app_iter)
+        if close_func is not None and app_iter is not app_rv:
+            app_iter = ClosingIterator(app_iter, close_func)
+
+    return app_iter, response[0], Headers(response[1])
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/testapp.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/testapp.py
new file mode 100644
index 0000000..5ea8549
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/testapp.py
@@ -0,0 +1,241 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.testapp
+    ~~~~~~~~~~~~~~~~
+
+    Provide a small test application that can be used to test a WSGI server
+    and check it for WSGI compliance.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import base64
+import os
+import sys
+from textwrap import wrap
+
+from . import __version__ as _werkzeug_version
+from .utils import escape
+from .wrappers import BaseRequest as Request
+from .wrappers import BaseResponse as Response
+
+logo = Response(
+    base64.b64decode(
+        """
+R0lGODlhoACgAOMIAAEDACwpAEpCAGdgAJaKAM28AOnVAP3rAP/////////
+//////////////////////yH5BAEKAAgALAAAAACgAKAAAAT+EMlJq704680R+F0ojmRpnuj0rWnrv
+nB8rbRs33gu0bzu/0AObxgsGn3D5HHJbCUFyqZ0ukkSDlAidctNFg7gbI9LZlrBaHGtzAae0eloe25
+7w9EDOX2fst/xenyCIn5/gFqDiVVDV4aGeYiKkhSFjnCQY5OTlZaXgZp8nJ2ekaB0SQOjqphrpnOiq
+ncEn65UsLGytLVmQ6m4sQazpbtLqL/HwpnER8bHyLrLOc3Oz8PRONPU1crXN9na263dMt/g4SzjMeX
+m5yDpLqgG7OzJ4u8lT/P69ej3JPn69kHzN2OIAHkB9RUYSFCFQYQJFTIkCDBiwoXWGnowaLEjRm7+G
+p9A7Hhx4rUkAUaSLJlxHMqVMD/aSycSZkyTplCqtGnRAM5NQ1Ly5OmzZc6gO4d6DGAUKA+hSocWYAo
+SlM6oUWX2O/o0KdaVU5vuSQLAa0ADwQgMEMB2AIECZhVSnTno6spgbtXmHcBUrQACcc2FrTrWS8wAf
+78cMFBgwIBgbN+qvTt3ayikRBk7BoyGAGABAdYyfdzRQGV3l4coxrqQ84GpUBmrdR3xNIDUPAKDBSA
+ADIGDhhqTZIWaDcrVX8EsbNzbkvCOxG8bN5w8ly9H8jyTJHC6DFndQydbguh2e/ctZJFXRxMAqqPVA
+tQH5E64SPr1f0zz7sQYjAHg0In+JQ11+N2B0XXBeeYZgBZFx4tqBToiTCPv0YBgQv8JqA6BEf6RhXx
+w1ENhRBnWV8ctEX4Ul2zc3aVGcQNC2KElyTDYyYUWvShdjDyMOGMuFjqnII45aogPhz/CodUHFwaDx
+lTgsaOjNyhGWJQd+lFoAGk8ObghI0kawg+EV5blH3dr+digkYuAGSaQZFHFz2P/cTaLmhF52QeSb45
+Jwxd+uSVGHlqOZpOeJpCFZ5J+rkAkFjQ0N1tah7JJSZUFNsrkeJUJMIBi8jyaEKIhKPomnC91Uo+NB
+yyaJ5umnnpInIFh4t6ZSpGaAVmizqjpByDegYl8tPE0phCYrhcMWSv+uAqHfgH88ak5UXZmlKLVJhd
+dj78s1Fxnzo6yUCrV6rrDOkluG+QzCAUTbCwf9SrmMLzK6p+OPHx7DF+bsfMRq7Ec61Av9i6GLw23r
+idnZ+/OO0a99pbIrJkproCQMA17OPG6suq3cca5ruDfXCCDoS7BEdvmJn5otdqscn+uogRHHXs8cbh
+EIfYaDY1AkrC0cqwcZpnM6ludx72x0p7Fo/hZAcpJDjax0UdHavMKAbiKltMWCF3xxh9k25N/Viud8
+ba78iCvUkt+V6BpwMlErmcgc502x+u1nSxJSJP9Mi52awD1V4yB/QHONsnU3L+A/zR4VL/indx/y64
+gqcj+qgTeweM86f0Qy1QVbvmWH1D9h+alqg254QD8HJXHvjQaGOqEqC22M54PcftZVKVSQG9jhkv7C
+JyTyDoAJfPdu8v7DRZAxsP/ky9MJ3OL36DJfCFPASC3/aXlfLOOON9vGZZHydGf8LnxYJuuVIbl83y
+Az5n/RPz07E+9+zw2A2ahz4HxHo9Kt79HTMx1Q7ma7zAzHgHqYH0SoZWyTuOLMiHwSfZDAQTn0ajk9
+YQqodnUYjByQZhZak9Wu4gYQsMyEpIOAOQKze8CmEF45KuAHTvIDOfHJNipwoHMuGHBnJElUoDmAyX
+c2Qm/R8Ah/iILCCJOEokGowdhDYc/yoL+vpRGwyVSCWFYZNljkhEirGXsalWcAgOdeAdoXcktF2udb
+qbUhjWyMQxYO01o6KYKOr6iK3fE4MaS+DsvBsGOBaMb0Y6IxADaJhFICaOLmiWTlDAnY1KzDG4ambL
+cWBA8mUzjJsN2KjSaSXGqMCVXYpYkj33mcIApyhQf6YqgeNAmNvuC0t4CsDbSshZJkCS1eNisKqlyG
+cF8G2JeiDX6tO6Mv0SmjCa3MFb0bJaGPMU0X7c8XcpvMaOQmCajwSeY9G0WqbBmKv34DsMIEztU6Y2
+KiDlFdt6jnCSqx7Dmt6XnqSKaFFHNO5+FmODxMCWBEaco77lNDGXBM0ECYB/+s7nKFdwSF5hgXumQe
+EZ7amRg39RHy3zIjyRCykQh8Zo2iviRKyTDn/zx6EefptJj2Cw+Ep2FSc01U5ry4KLPYsTyWnVGnvb
+UpyGlhjBUljyjHhWpf8OFaXwhp9O4T1gU9UeyPPa8A2l0p1kNqPXEVRm1AOs1oAGZU596t6SOR2mcB
+Oco1srWtkaVrMUzIErrKri85keKqRQYX9VX0/eAUK1hrSu6HMEX3Qh2sCh0q0D2CtnUqS4hj62sE/z
+aDs2Sg7MBS6xnQeooc2R2tC9YrKpEi9pLXfYXp20tDCpSP8rKlrD4axprb9u1Df5hSbz9QU0cRpfgn
+kiIzwKucd0wsEHlLpe5yHXuc6FrNelOl7pY2+11kTWx7VpRu97dXA3DO1vbkhcb4zyvERYajQgAADs
+="""
+    ),
+    mimetype="image/png",
+)
+
+
+TEMPLATE = u"""\
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+  "http://www.w3.org/TR/html4/loose.dtd">
+<title>WSGI Information</title>
+<style type="text/css">
+  @import url(https://fonts.googleapis.com/css?family=Ubuntu);
+
+  body       { font-family: 'Lucida Grande', 'Lucida Sans Unicode', 'Geneva',
+               'Verdana', sans-serif; background-color: white; color: #000;
+               font-size: 15px; text-align: center; }
+  #logo      { float: right; padding: 0 0 10px 10px; }
+  div.box    { text-align: left; width: 45em; margin: auto; padding: 50px 0;
+               background-color: white; }
+  h1, h2     { font-family: 'Ubuntu', 'Lucida Grande', 'Lucida Sans Unicode',
+               'Geneva', 'Verdana', sans-serif; font-weight: normal; }
+  h1         { margin: 0 0 30px 0; }
+  h2         { font-size: 1.4em; margin: 1em 0 0.5em 0; }
+  table      { width: 100%%; border-collapse: collapse; border: 1px solid #AFC5C9 }
+  table th   { background-color: #AFC1C4; color: white; font-size: 0.72em;
+               font-weight: normal; width: 18em; vertical-align: top;
+               padding: 0.5em 0 0.1em 0.5em; }
+  table td   { border: 1px solid #AFC5C9; padding: 0.1em 0 0.1em 0.5em; }
+  code       { font-family: 'Consolas', 'Monaco', 'Bitstream Vera Sans Mono',
+               monospace; font-size: 0.7em; }
+  ul li      { line-height: 1.5em; }
+  ul.path    { font-size: 0.7em; margin: 0 -30px; padding: 8px 30px;
+               list-style: none; background: #E8EFF0; }
+  ul.path li { line-height: 1.6em; }
+  li.virtual { color: #999; text-decoration: underline; }
+  li.exp     { background: white; }
+</style>
+<div class="box">
+  <img src="?resource=logo" id="logo" alt="[The Werkzeug Logo]" />
+  <h1>WSGI Information</h1>
+  <p>
+    This page displays all available information about the WSGI server and
+    the underlying Python interpreter.
+  <h2 id="python-interpreter">Python Interpreter</h2>
+  <table>
+    <tr>
+      <th>Python Version
+      <td>%(python_version)s
+    <tr>
+      <th>Platform
+      <td>%(platform)s [%(os)s]
+    <tr>
+      <th>API Version
+      <td>%(api_version)s
+    <tr>
+      <th>Byteorder
+      <td>%(byteorder)s
+    <tr>
+      <th>Werkzeug Version
+      <td>%(werkzeug_version)s
+  </table>
+  <h2 id="wsgi-environment">WSGI Environment</h2>
+  <table>%(wsgi_env)s</table>
+  <h2 id="installed-eggs">Installed Eggs</h2>
+  <p>
+    The following python packages were installed on the system as
+    Python eggs:
+  <ul>%(python_eggs)s</ul>
+  <h2 id="sys-path">System Path</h2>
+  <p>
+    The following paths are the current contents of the load path.  The
+    following entries are looked up for Python packages.  Note that not
+    all items in this path are folders.  Gray and underlined items are
+    entries pointing to invalid resources or used by custom import hooks
+    such as the zip importer.
+  <p>
+    Items with a bright background were expanded for display from a relative
+    path.  If you encounter such paths in the output you might want to check
+    your setup as relative paths are usually problematic in multithreaded
+    environments.
+  <ul class="path">%(sys_path)s</ul>
+</div>
+"""
+
+
+def iter_sys_path():
+    if os.name == "posix":
+
+        def strip(x):
+            prefix = os.path.expanduser("~")
+            if x.startswith(prefix):
+                x = "~" + x[len(prefix) :]
+            return x
+
+    else:
+
+        def strip(x):
+            return x
+
+    cwd = os.path.abspath(os.getcwd())
+    for item in sys.path:
+        path = os.path.join(cwd, item or os.path.curdir)
+        yield strip(os.path.normpath(path)), not os.path.isdir(path), path != item
+
+
+def render_testapp(req):
+    try:
+        import pkg_resources
+    except ImportError:
+        eggs = ()
+    else:
+        eggs = sorted(pkg_resources.working_set, key=lambda x: x.project_name.lower())
+    python_eggs = []
+    for egg in eggs:
+        try:
+            version = egg.version
+        except (ValueError, AttributeError):
+            version = "unknown"
+        python_eggs.append(
+            "<li>%s <small>[%s]</small>" % (escape(egg.project_name), escape(version))
+        )
+
+    wsgi_env = []
+    sorted_environ = sorted(req.environ.items(), key=lambda x: repr(x[0]).lower())
+    for key, value in sorted_environ:
+        wsgi_env.append(
+            "<tr><th>%s<td><code>%s</code>"
+            % (escape(str(key)), " ".join(wrap(escape(repr(value)))))
+        )
+
+    sys_path = []
+    for item, virtual, expanded in iter_sys_path():
+        class_ = []
+        if virtual:
+            class_.append("virtual")
+        if expanded:
+            class_.append("exp")
+        sys_path.append(
+            "<li%s>%s"
+            % (' class="%s"' % " ".join(class_) if class_ else "", escape(item))
+        )
+
+    return (
+        TEMPLATE
+        % {
+            "python_version": "<br>".join(escape(sys.version).splitlines()),
+            "platform": escape(sys.platform),
+            "os": escape(os.name),
+            "api_version": sys.api_version,
+            "byteorder": sys.byteorder,
+            "werkzeug_version": _werkzeug_version,
+            "python_eggs": "\n".join(python_eggs),
+            "wsgi_env": "\n".join(wsgi_env),
+            "sys_path": "\n".join(sys_path),
+        }
+    ).encode("utf-8")
+
+
+def test_app(environ, start_response):
+    """Simple test application that dumps the environment.  You can use
+    it to check if Werkzeug is working properly:
+
+    .. sourcecode:: pycon
+
+        >>> from werkzeug.serving import run_simple
+        >>> from werkzeug.testapp import test_app
+        >>> run_simple('localhost', 3000, test_app)
+         * Running on http://localhost:3000/
+
+    The application displays important information from the WSGI environment,
+    the Python interpreter and the installed libraries.
+    """
+    req = Request(environ, populate_request=False)
+    if req.args.get("resource") == "logo":
+        response = logo
+    else:
+        response = Response(render_testapp(req), mimetype="text/html")
+    return response(environ, start_response)
+
+
+if __name__ == "__main__":
+    from .serving import run_simple
+
+    run_simple("localhost", 5000, test_app, use_reloader=True)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/urls.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/urls.py
new file mode 100644
index 0000000..d5e487b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/urls.py
@@ -0,0 +1,1138 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.urls
+    ~~~~~~~~~~~~~
+
+    ``werkzeug.urls`` used to provide several wrapper functions for Python 2
+    urlparse, whose main purpose were to work around the behavior of the Py2
+    stdlib and its lack of unicode support. While this was already a somewhat
+    inconvenient situation, it got even more complicated because Python 3's
+    ``urllib.parse`` actually does handle unicode properly. In other words,
+    this module would wrap two libraries with completely different behavior. So
+    now this module contains a 2-and-3-compatible backport of Python 3's
+    ``urllib.parse``, which is mostly API-compatible.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import codecs
+import os
+import re
+from collections import namedtuple
+
+from ._compat import fix_tuple_repr
+from ._compat import implements_to_string
+from ._compat import make_literal_wrapper
+from ._compat import normalize_string_tuple
+from ._compat import PY2
+from ._compat import text_type
+from ._compat import to_native
+from ._compat import to_unicode
+from ._compat import try_coerce_native
+from ._internal import _decode_idna
+from ._internal import _encode_idna
+
+# A regular expression for what a valid schema looks like
+_scheme_re = re.compile(r"^[a-zA-Z0-9+-.]+$")
+
+# Characters that are safe in any part of an URL.
+_always_safe = frozenset(
+    bytearray(
+        b"abcdefghijklmnopqrstuvwxyz"
+        b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+        b"0123456789"
+        b"-._~"
+    )
+)
+
+_hexdigits = "0123456789ABCDEFabcdef"
+_hextobyte = dict(
+    ((a + b).encode(), int(a + b, 16)) for a in _hexdigits for b in _hexdigits
+)
+_bytetohex = [("%%%02X" % char).encode("ascii") for char in range(256)]
+
+
+_URLTuple = fix_tuple_repr(
+    namedtuple("_URLTuple", ["scheme", "netloc", "path", "query", "fragment"])
+)
+
+
+class BaseURL(_URLTuple):
+    """Superclass of :py:class:`URL` and :py:class:`BytesURL`."""
+
+    __slots__ = ()
+
+    def replace(self, **kwargs):
+        """Return an URL with the same values, except for those parameters
+        given new values by whichever keyword arguments are specified."""
+        return self._replace(**kwargs)
+
+    @property
+    def host(self):
+        """The host part of the URL if available, otherwise `None`.  The
+        host is either the hostname or the IP address mentioned in the
+        URL.  It will not contain the port.
+        """
+        return self._split_host()[0]
+
+    @property
+    def ascii_host(self):
+        """Works exactly like :attr:`host` but will return a result that
+        is restricted to ASCII.  If it finds a netloc that is not ASCII
+        it will attempt to idna decode it.  This is useful for socket
+        operations when the URL might include internationalized characters.
+        """
+        rv = self.host
+        if rv is not None and isinstance(rv, text_type):
+            try:
+                rv = _encode_idna(rv)
+            except UnicodeError:
+                rv = rv.encode("ascii", "ignore")
+        return to_native(rv, "ascii", "ignore")
+
+    @property
+    def port(self):
+        """The port in the URL as an integer if it was present, `None`
+        otherwise.  This does not fill in default ports.
+        """
+        try:
+            rv = int(to_native(self._split_host()[1]))
+            if 0 <= rv <= 65535:
+                return rv
+        except (ValueError, TypeError):
+            pass
+
+    @property
+    def auth(self):
+        """The authentication part in the URL if available, `None`
+        otherwise.
+        """
+        return self._split_netloc()[0]
+
+    @property
+    def username(self):
+        """The username if it was part of the URL, `None` otherwise.
+        This undergoes URL decoding and will always be a unicode string.
+        """
+        rv = self._split_auth()[0]
+        if rv is not None:
+            return _url_unquote_legacy(rv)
+
+    @property
+    def raw_username(self):
+        """The username if it was part of the URL, `None` otherwise.
+        Unlike :attr:`username` this one is not being decoded.
+        """
+        return self._split_auth()[0]
+
+    @property
+    def password(self):
+        """The password if it was part of the URL, `None` otherwise.
+        This undergoes URL decoding and will always be a unicode string.
+        """
+        rv = self._split_auth()[1]
+        if rv is not None:
+            return _url_unquote_legacy(rv)
+
+    @property
+    def raw_password(self):
+        """The password if it was part of the URL, `None` otherwise.
+        Unlike :attr:`password` this one is not being decoded.
+        """
+        return self._split_auth()[1]
+
+    def decode_query(self, *args, **kwargs):
+        """Decodes the query part of the URL.  Ths is a shortcut for
+        calling :func:`url_decode` on the query argument.  The arguments and
+        keyword arguments are forwarded to :func:`url_decode` unchanged.
+        """
+        return url_decode(self.query, *args, **kwargs)
+
+    def join(self, *args, **kwargs):
+        """Joins this URL with another one.  This is just a convenience
+        function for calling into :meth:`url_join` and then parsing the
+        return value again.
+        """
+        return url_parse(url_join(self, *args, **kwargs))
+
+    def to_url(self):
+        """Returns a URL string or bytes depending on the type of the
+        information stored.  This is just a convenience function
+        for calling :meth:`url_unparse` for this URL.
+        """
+        return url_unparse(self)
+
+    def decode_netloc(self):
+        """Decodes the netloc part into a string."""
+        rv = _decode_idna(self.host or "")
+
+        if ":" in rv:
+            rv = "[%s]" % rv
+        port = self.port
+        if port is not None:
+            rv = "%s:%d" % (rv, port)
+        auth = ":".join(
+            filter(
+                None,
+                [
+                    _url_unquote_legacy(self.raw_username or "", "/:%@"),
+                    _url_unquote_legacy(self.raw_password or "", "/:%@"),
+                ],
+            )
+        )
+        if auth:
+            rv = "%s@%s" % (auth, rv)
+        return rv
+
+    def to_uri_tuple(self):
+        """Returns a :class:`BytesURL` tuple that holds a URI.  This will
+        encode all the information in the URL properly to ASCII using the
+        rules a web browser would follow.
+
+        It's usually more interesting to directly call :meth:`iri_to_uri` which
+        will return a string.
+        """
+        return url_parse(iri_to_uri(self).encode("ascii"))
+
+    def to_iri_tuple(self):
+        """Returns a :class:`URL` tuple that holds a IRI.  This will try
+        to decode as much information as possible in the URL without
+        losing information similar to how a web browser does it for the
+        URL bar.
+
+        It's usually more interesting to directly call :meth:`uri_to_iri` which
+        will return a string.
+        """
+        return url_parse(uri_to_iri(self))
+
+    def get_file_location(self, pathformat=None):
+        """Returns a tuple with the location of the file in the form
+        ``(server, location)``.  If the netloc is empty in the URL or
+        points to localhost, it's represented as ``None``.
+
+        The `pathformat` by default is autodetection but needs to be set
+        when working with URLs of a specific system.  The supported values
+        are ``'windows'`` when working with Windows or DOS paths and
+        ``'posix'`` when working with posix paths.
+
+        If the URL does not point to a local file, the server and location
+        are both represented as ``None``.
+
+        :param pathformat: The expected format of the path component.
+                           Currently ``'windows'`` and ``'posix'`` are
+                           supported.  Defaults to ``None`` which is
+                           autodetect.
+        """
+        if self.scheme != "file":
+            return None, None
+
+        path = url_unquote(self.path)
+        host = self.netloc or None
+
+        if pathformat is None:
+            if os.name == "nt":
+                pathformat = "windows"
+            else:
+                pathformat = "posix"
+
+        if pathformat == "windows":
+            if path[:1] == "/" and path[1:2].isalpha() and path[2:3] in "|:":
+                path = path[1:2] + ":" + path[3:]
+            windows_share = path[:3] in ("\\" * 3, "/" * 3)
+            import ntpath
+
+            path = ntpath.normpath(path)
+            # Windows shared drives are represented as ``\\host\\directory``.
+            # That results in a URL like ``file://///host/directory``, and a
+            # path like ``///host/directory``. We need to special-case this
+            # because the path contains the hostname.
+            if windows_share and host is None:
+                parts = path.lstrip("\\").split("\\", 1)
+                if len(parts) == 2:
+                    host, path = parts
+                else:
+                    host = parts[0]
+                    path = ""
+        elif pathformat == "posix":
+            import posixpath
+
+            path = posixpath.normpath(path)
+        else:
+            raise TypeError("Invalid path format %s" % repr(pathformat))
+
+        if host in ("127.0.0.1", "::1", "localhost"):
+            host = None
+
+        return host, path
+
+    def _split_netloc(self):
+        if self._at in self.netloc:
+            return self.netloc.split(self._at, 1)
+        return None, self.netloc
+
+    def _split_auth(self):
+        auth = self._split_netloc()[0]
+        if not auth:
+            return None, None
+        if self._colon not in auth:
+            return auth, None
+        return auth.split(self._colon, 1)
+
+    def _split_host(self):
+        rv = self._split_netloc()[1]
+        if not rv:
+            return None, None
+
+        if not rv.startswith(self._lbracket):
+            if self._colon in rv:
+                return rv.split(self._colon, 1)
+            return rv, None
+
+        idx = rv.find(self._rbracket)
+        if idx < 0:
+            return rv, None
+
+        host = rv[1:idx]
+        rest = rv[idx + 1 :]
+        if rest.startswith(self._colon):
+            return host, rest[1:]
+        return host, None
+
+
+@implements_to_string
+class URL(BaseURL):
+    """Represents a parsed URL.  This behaves like a regular tuple but
+    also has some extra attributes that give further insight into the
+    URL.
+    """
+
+    __slots__ = ()
+    _at = "@"
+    _colon = ":"
+    _lbracket = "["
+    _rbracket = "]"
+
+    def __str__(self):
+        return self.to_url()
+
+    def encode_netloc(self):
+        """Encodes the netloc part to an ASCII safe URL as bytes."""
+        rv = self.ascii_host or ""
+        if ":" in rv:
+            rv = "[%s]" % rv
+        port = self.port
+        if port is not None:
+            rv = "%s:%d" % (rv, port)
+        auth = ":".join(
+            filter(
+                None,
+                [
+                    url_quote(self.raw_username or "", "utf-8", "strict", "/:%"),
+                    url_quote(self.raw_password or "", "utf-8", "strict", "/:%"),
+                ],
+            )
+        )
+        if auth:
+            rv = "%s@%s" % (auth, rv)
+        return to_native(rv)
+
+    def encode(self, charset="utf-8", errors="replace"):
+        """Encodes the URL to a tuple made out of bytes.  The charset is
+        only being used for the path, query and fragment.
+        """
+        return BytesURL(
+            self.scheme.encode("ascii"),
+            self.encode_netloc(),
+            self.path.encode(charset, errors),
+            self.query.encode(charset, errors),
+            self.fragment.encode(charset, errors),
+        )
+
+
+class BytesURL(BaseURL):
+    """Represents a parsed URL in bytes."""
+
+    __slots__ = ()
+    _at = b"@"
+    _colon = b":"
+    _lbracket = b"["
+    _rbracket = b"]"
+
+    def __str__(self):
+        return self.to_url().decode("utf-8", "replace")
+
+    def encode_netloc(self):
+        """Returns the netloc unchanged as bytes."""
+        return self.netloc
+
+    def decode(self, charset="utf-8", errors="replace"):
+        """Decodes the URL to a tuple made out of strings.  The charset is
+        only being used for the path, query and fragment.
+        """
+        return URL(
+            self.scheme.decode("ascii"),
+            self.decode_netloc(),
+            self.path.decode(charset, errors),
+            self.query.decode(charset, errors),
+            self.fragment.decode(charset, errors),
+        )
+
+
+_unquote_maps = {frozenset(): _hextobyte}
+
+
+def _unquote_to_bytes(string, unsafe=""):
+    if isinstance(string, text_type):
+        string = string.encode("utf-8")
+
+    if isinstance(unsafe, text_type):
+        unsafe = unsafe.encode("utf-8")
+
+    unsafe = frozenset(bytearray(unsafe))
+    groups = iter(string.split(b"%"))
+    result = bytearray(next(groups, b""))
+
+    try:
+        hex_to_byte = _unquote_maps[unsafe]
+    except KeyError:
+        hex_to_byte = _unquote_maps[unsafe] = {
+            h: b for h, b in _hextobyte.items() if b not in unsafe
+        }
+
+    for group in groups:
+        code = group[:2]
+
+        if code in hex_to_byte:
+            result.append(hex_to_byte[code])
+            result.extend(group[2:])
+        else:
+            result.append(37)  # %
+            result.extend(group)
+
+    return bytes(result)
+
+
+def _url_encode_impl(obj, charset, encode_keys, sort, key):
+    from .datastructures import iter_multi_items
+
+    iterable = iter_multi_items(obj)
+    if sort:
+        iterable = sorted(iterable, key=key)
+    for key, value in iterable:
+        if value is None:
+            continue
+        if not isinstance(key, bytes):
+            key = text_type(key).encode(charset)
+        if not isinstance(value, bytes):
+            value = text_type(value).encode(charset)
+        yield _fast_url_quote_plus(key) + "=" + _fast_url_quote_plus(value)
+
+
+def _url_unquote_legacy(value, unsafe=""):
+    try:
+        return url_unquote(value, charset="utf-8", errors="strict", unsafe=unsafe)
+    except UnicodeError:
+        return url_unquote(value, charset="latin1", unsafe=unsafe)
+
+
+def url_parse(url, scheme=None, allow_fragments=True):
+    """Parses a URL from a string into a :class:`URL` tuple.  If the URL
+    is lacking a scheme it can be provided as second argument. Otherwise,
+    it is ignored.  Optionally fragments can be stripped from the URL
+    by setting `allow_fragments` to `False`.
+
+    The inverse of this function is :func:`url_unparse`.
+
+    :param url: the URL to parse.
+    :param scheme: the default schema to use if the URL is schemaless.
+    :param allow_fragments: if set to `False` a fragment will be removed
+                            from the URL.
+    """
+    s = make_literal_wrapper(url)
+    is_text_based = isinstance(url, text_type)
+
+    if scheme is None:
+        scheme = s("")
+    netloc = query = fragment = s("")
+    i = url.find(s(":"))
+    if i > 0 and _scheme_re.match(to_native(url[:i], errors="replace")):
+        # make sure "iri" is not actually a port number (in which case
+        # "scheme" is really part of the path)
+        rest = url[i + 1 :]
+        if not rest or any(c not in s("0123456789") for c in rest):
+            # not a port number
+            scheme, url = url[:i].lower(), rest
+
+    if url[:2] == s("//"):
+        delim = len(url)
+        for c in s("/?#"):
+            wdelim = url.find(c, 2)
+            if wdelim >= 0:
+                delim = min(delim, wdelim)
+        netloc, url = url[2:delim], url[delim:]
+        if (s("[") in netloc and s("]") not in netloc) or (
+            s("]") in netloc and s("[") not in netloc
+        ):
+            raise ValueError("Invalid IPv6 URL")
+
+    if allow_fragments and s("#") in url:
+        url, fragment = url.split(s("#"), 1)
+    if s("?") in url:
+        url, query = url.split(s("?"), 1)
+
+    result_type = URL if is_text_based else BytesURL
+    return result_type(scheme, netloc, url, query, fragment)
+
+
+def _make_fast_url_quote(charset="utf-8", errors="strict", safe="/:", unsafe=""):
+    """Precompile the translation table for a URL encoding function.
+
+    Unlike :func:`url_quote`, the generated function only takes the
+    string to quote.
+
+    :param charset: The charset to encode the result with.
+    :param errors: How to handle encoding errors.
+    :param safe: An optional sequence of safe characters to never encode.
+    :param unsafe: An optional sequence of unsafe characters to always encode.
+    """
+    if isinstance(safe, text_type):
+        safe = safe.encode(charset, errors)
+
+    if isinstance(unsafe, text_type):
+        unsafe = unsafe.encode(charset, errors)
+
+    safe = (frozenset(bytearray(safe)) | _always_safe) - frozenset(bytearray(unsafe))
+    table = [chr(c) if c in safe else "%%%02X" % c for c in range(256)]
+
+    if not PY2:
+
+        def quote(string):
+            return "".join([table[c] for c in string])
+
+    else:
+
+        def quote(string):
+            return "".join([table[c] for c in bytearray(string)])
+
+    return quote
+
+
+_fast_url_quote = _make_fast_url_quote()
+_fast_quote_plus = _make_fast_url_quote(safe=" ", unsafe="+")
+
+
+def _fast_url_quote_plus(string):
+    return _fast_quote_plus(string).replace(" ", "+")
+
+
+def url_quote(string, charset="utf-8", errors="strict", safe="/:", unsafe=""):
+    """URL encode a single string with a given encoding.
+
+    :param s: the string to quote.
+    :param charset: the charset to be used.
+    :param safe: an optional sequence of safe characters.
+    :param unsafe: an optional sequence of unsafe characters.
+
+    .. versionadded:: 0.9.2
+       The `unsafe` parameter was added.
+    """
+    if not isinstance(string, (text_type, bytes, bytearray)):
+        string = text_type(string)
+    if isinstance(string, text_type):
+        string = string.encode(charset, errors)
+    if isinstance(safe, text_type):
+        safe = safe.encode(charset, errors)
+    if isinstance(unsafe, text_type):
+        unsafe = unsafe.encode(charset, errors)
+    safe = (frozenset(bytearray(safe)) | _always_safe) - frozenset(bytearray(unsafe))
+    rv = bytearray()
+    for char in bytearray(string):
+        if char in safe:
+            rv.append(char)
+        else:
+            rv.extend(_bytetohex[char])
+    return to_native(bytes(rv))
+
+
+def url_quote_plus(string, charset="utf-8", errors="strict", safe=""):
+    """URL encode a single string with the given encoding and convert
+    whitespace to "+".
+
+    :param s: The string to quote.
+    :param charset: The charset to be used.
+    :param safe: An optional sequence of safe characters.
+    """
+    return url_quote(string, charset, errors, safe + " ", "+").replace(" ", "+")
+
+
+def url_unparse(components):
+    """The reverse operation to :meth:`url_parse`.  This accepts arbitrary
+    as well as :class:`URL` tuples and returns a URL as a string.
+
+    :param components: the parsed URL as tuple which should be converted
+                       into a URL string.
+    """
+    scheme, netloc, path, query, fragment = normalize_string_tuple(components)
+    s = make_literal_wrapper(scheme)
+    url = s("")
+
+    # We generally treat file:///x and file:/x the same which is also
+    # what browsers seem to do.  This also allows us to ignore a schema
+    # register for netloc utilization or having to differentiate between
+    # empty and missing netloc.
+    if netloc or (scheme and path.startswith(s("/"))):
+        if path and path[:1] != s("/"):
+            path = s("/") + path
+        url = s("//") + (netloc or s("")) + path
+    elif path:
+        url += path
+    if scheme:
+        url = scheme + s(":") + url
+    if query:
+        url = url + s("?") + query
+    if fragment:
+        url = url + s("#") + fragment
+    return url
+
+
+def url_unquote(string, charset="utf-8", errors="replace", unsafe=""):
+    """URL decode a single string with a given encoding.  If the charset
+    is set to `None` no unicode decoding is performed and raw bytes
+    are returned.
+
+    :param s: the string to unquote.
+    :param charset: the charset of the query string.  If set to `None`
+                    no unicode decoding will take place.
+    :param errors: the error handling for the charset decoding.
+    """
+    rv = _unquote_to_bytes(string, unsafe)
+    if charset is not None:
+        rv = rv.decode(charset, errors)
+    return rv
+
+
+def url_unquote_plus(s, charset="utf-8", errors="replace"):
+    """URL decode a single string with the given `charset` and decode "+" to
+    whitespace.
+
+    Per default encoding errors are ignored.  If you want a different behavior
+    you can set `errors` to ``'replace'`` or ``'strict'``.  In strict mode a
+    :exc:`HTTPUnicodeError` is raised.
+
+    :param s: The string to unquote.
+    :param charset: the charset of the query string.  If set to `None`
+                    no unicode decoding will take place.
+    :param errors: The error handling for the `charset` decoding.
+    """
+    if isinstance(s, text_type):
+        s = s.replace(u"+", u" ")
+    else:
+        s = s.replace(b"+", b" ")
+    return url_unquote(s, charset, errors)
+
+
+def url_fix(s, charset="utf-8"):
+    r"""Sometimes you get an URL by a user that just isn't a real URL because
+    it contains unsafe characters like ' ' and so on. This function can fix
+    some of the problems in a similar way browsers handle data entered by the
+    user:
+
+    >>> url_fix(u'http://de.wikipedia.org/wiki/Elf (Begriffskl\xe4rung)')
+    'http://de.wikipedia.org/wiki/Elf%20(Begriffskl%C3%A4rung)'
+
+    :param s: the string with the URL to fix.
+    :param charset: The target charset for the URL if the url was given as
+                    unicode string.
+    """
+    # First step is to switch to unicode processing and to convert
+    # backslashes (which are invalid in URLs anyways) to slashes.  This is
+    # consistent with what Chrome does.
+    s = to_unicode(s, charset, "replace").replace("\\", "/")
+
+    # For the specific case that we look like a malformed windows URL
+    # we want to fix this up manually:
+    if s.startswith("file://") and s[7:8].isalpha() and s[8:10] in (":/", "|/"):
+        s = "file:///" + s[7:]
+
+    url = url_parse(s)
+    path = url_quote(url.path, charset, safe="/%+$!*'(),")
+    qs = url_quote_plus(url.query, charset, safe=":&%=+$!*'(),")
+    anchor = url_quote_plus(url.fragment, charset, safe=":&%=+$!*'(),")
+    return to_native(url_unparse((url.scheme, url.encode_netloc(), path, qs, anchor)))
+
+
+# not-unreserved characters remain quoted when unquoting to IRI
+_to_iri_unsafe = "".join([chr(c) for c in range(128) if c not in _always_safe])
+
+
+def _codec_error_url_quote(e):
+    """Used in :func:`uri_to_iri` after unquoting to re-quote any
+    invalid bytes.
+    """
+    out = _fast_url_quote(e.object[e.start : e.end])
+
+    if PY2:
+        out = out.decode("utf-8")
+
+    return out, e.end
+
+
+codecs.register_error("werkzeug.url_quote", _codec_error_url_quote)
+
+
+def uri_to_iri(uri, charset="utf-8", errors="werkzeug.url_quote"):
+    """Convert a URI to an IRI. All valid UTF-8 characters are unquoted,
+    leaving all reserved and invalid characters quoted. If the URL has
+    a domain, it is decoded from Punycode.
+
+    >>> uri_to_iri("http://xn--n3h.net/p%C3%A5th?q=%C3%A8ry%DF")
+    'http://\\u2603.net/p\\xe5th?q=\\xe8ry%DF'
+
+    :param uri: The URI to convert.
+    :param charset: The encoding to encode unquoted bytes with.
+    :param errors: Error handler to use during ``bytes.encode``. By
+        default, invalid bytes are left quoted.
+
+    .. versionchanged:: 0.15
+        All reserved and invalid characters remain quoted. Previously,
+        only some reserved characters were preserved, and invalid bytes
+        were replaced instead of left quoted.
+
+    .. versionadded:: 0.6
+    """
+    if isinstance(uri, tuple):
+        uri = url_unparse(uri)
+
+    uri = url_parse(to_unicode(uri, charset))
+    path = url_unquote(uri.path, charset, errors, _to_iri_unsafe)
+    query = url_unquote(uri.query, charset, errors, _to_iri_unsafe)
+    fragment = url_unquote(uri.fragment, charset, errors, _to_iri_unsafe)
+    return url_unparse((uri.scheme, uri.decode_netloc(), path, query, fragment))
+
+
+# reserved characters remain unquoted when quoting to URI
+_to_uri_safe = ":/?#[]@!$&'()*+,;=%"
+
+
+def iri_to_uri(iri, charset="utf-8", errors="strict", safe_conversion=False):
+    """Convert an IRI to a URI. All non-ASCII and unsafe characters are
+    quoted. If the URL has a domain, it is encoded to Punycode.
+
+    >>> iri_to_uri('http://\\u2603.net/p\\xe5th?q=\\xe8ry%DF')
+    'http://xn--n3h.net/p%C3%A5th?q=%C3%A8ry%DF'
+
+    :param iri: The IRI to convert.
+    :param charset: The encoding of the IRI.
+    :param errors: Error handler to use during ``bytes.encode``.
+    :param safe_conversion: Return the URL unchanged if it only contains
+        ASCII characters and no whitespace. See the explanation below.
+
+    There is a general problem with IRI conversion with some protocols
+    that are in violation of the URI specification. Consider the
+    following two IRIs::
+
+        magnet:?xt=uri:whatever
+        itms-services://?action=download-manifest
+
+    After parsing, we don't know if the scheme requires the ``//``,
+    which is dropped if empty, but conveys different meanings in the
+    final URL if it's present or not. In this case, you can use
+    ``safe_conversion``, which will return the URL unchanged if it only
+    contains ASCII characters and no whitespace. This can result in a
+    URI with unquoted characters if it was not already quoted correctly,
+    but preserves the URL's semantics. Werkzeug uses this for the
+    ``Location`` header for redirects.
+
+    .. versionchanged:: 0.15
+        All reserved characters remain unquoted. Previously, only some
+        reserved characters were left unquoted.
+
+    .. versionchanged:: 0.9.6
+       The ``safe_conversion`` parameter was added.
+
+    .. versionadded:: 0.6
+    """
+    if isinstance(iri, tuple):
+        iri = url_unparse(iri)
+
+    if safe_conversion:
+        # If we're not sure if it's safe to convert the URL, and it only
+        # contains ASCII characters, return it unconverted.
+        try:
+            native_iri = to_native(iri)
+            ascii_iri = native_iri.encode("ascii")
+
+            # Only return if it doesn't have whitespace. (Why?)
+            if len(ascii_iri.split()) == 1:
+                return native_iri
+        except UnicodeError:
+            pass
+
+    iri = url_parse(to_unicode(iri, charset, errors))
+    path = url_quote(iri.path, charset, errors, _to_uri_safe)
+    query = url_quote(iri.query, charset, errors, _to_uri_safe)
+    fragment = url_quote(iri.fragment, charset, errors, _to_uri_safe)
+    return to_native(
+        url_unparse((iri.scheme, iri.encode_netloc(), path, query, fragment))
+    )
+
+
+def url_decode(
+    s,
+    charset="utf-8",
+    decode_keys=False,
+    include_empty=True,
+    errors="replace",
+    separator="&",
+    cls=None,
+):
+    """
+    Parse a querystring and return it as :class:`MultiDict`.  There is a
+    difference in key decoding on different Python versions.  On Python 3
+    keys will always be fully decoded whereas on Python 2, keys will
+    remain bytestrings if they fit into ASCII.  On 2.x keys can be forced
+    to be unicode by setting `decode_keys` to `True`.
+
+    If the charset is set to `None` no unicode decoding will happen and
+    raw bytes will be returned.
+
+    Per default a missing value for a key will default to an empty key.  If
+    you don't want that behavior you can set `include_empty` to `False`.
+
+    Per default encoding errors are ignored.  If you want a different behavior
+    you can set `errors` to ``'replace'`` or ``'strict'``.  In strict mode a
+    `HTTPUnicodeError` is raised.
+
+    .. versionchanged:: 0.5
+       In previous versions ";" and "&" could be used for url decoding.
+       This changed in 0.5 where only "&" is supported.  If you want to
+       use ";" instead a different `separator` can be provided.
+
+       The `cls` parameter was added.
+
+    :param s: a string with the query string to decode.
+    :param charset: the charset of the query string.  If set to `None`
+                    no unicode decoding will take place.
+    :param decode_keys: Used on Python 2.x to control whether keys should
+                        be forced to be unicode objects.  If set to `True`
+                        then keys will be unicode in all cases. Otherwise,
+                        they remain `str` if they fit into ASCII.
+    :param include_empty: Set to `False` if you don't want empty values to
+                          appear in the dict.
+    :param errors: the decoding error behavior.
+    :param separator: the pair separator to be used, defaults to ``&``
+    :param cls: an optional dict class to use.  If this is not specified
+                       or `None` the default :class:`MultiDict` is used.
+    """
+    if cls is None:
+        from .datastructures import MultiDict
+
+        cls = MultiDict
+    if isinstance(s, text_type) and not isinstance(separator, text_type):
+        separator = separator.decode(charset or "ascii")
+    elif isinstance(s, bytes) and not isinstance(separator, bytes):
+        separator = separator.encode(charset or "ascii")
+    return cls(
+        _url_decode_impl(
+            s.split(separator), charset, decode_keys, include_empty, errors
+        )
+    )
+
+
+def url_decode_stream(
+    stream,
+    charset="utf-8",
+    decode_keys=False,
+    include_empty=True,
+    errors="replace",
+    separator="&",
+    cls=None,
+    limit=None,
+    return_iterator=False,
+):
+    """Works like :func:`url_decode` but decodes a stream.  The behavior
+    of stream and limit follows functions like
+    :func:`~werkzeug.wsgi.make_line_iter`.  The generator of pairs is
+    directly fed to the `cls` so you can consume the data while it's
+    parsed.
+
+    .. versionadded:: 0.8
+
+    :param stream: a stream with the encoded querystring
+    :param charset: the charset of the query string.  If set to `None`
+                    no unicode decoding will take place.
+    :param decode_keys: Used on Python 2.x to control whether keys should
+                        be forced to be unicode objects.  If set to `True`,
+                        keys will be unicode in all cases. Otherwise, they
+                        remain `str` if they fit into ASCII.
+    :param include_empty: Set to `False` if you don't want empty values to
+                          appear in the dict.
+    :param errors: the decoding error behavior.
+    :param separator: the pair separator to be used, defaults to ``&``
+    :param cls: an optional dict class to use.  If this is not specified
+                       or `None` the default :class:`MultiDict` is used.
+    :param limit: the content length of the URL data.  Not necessary if
+                  a limited stream is provided.
+    :param return_iterator: if set to `True` the `cls` argument is ignored
+                            and an iterator over all decoded pairs is
+                            returned
+    """
+    from .wsgi import make_chunk_iter
+
+    pair_iter = make_chunk_iter(stream, separator, limit)
+    decoder = _url_decode_impl(pair_iter, charset, decode_keys, include_empty, errors)
+
+    if return_iterator:
+        return decoder
+
+    if cls is None:
+        from .datastructures import MultiDict
+
+        cls = MultiDict
+
+    return cls(decoder)
+
+
+def _url_decode_impl(pair_iter, charset, decode_keys, include_empty, errors):
+    for pair in pair_iter:
+        if not pair:
+            continue
+        s = make_literal_wrapper(pair)
+        equal = s("=")
+        if equal in pair:
+            key, value = pair.split(equal, 1)
+        else:
+            if not include_empty:
+                continue
+            key = pair
+            value = s("")
+        key = url_unquote_plus(key, charset, errors)
+        if charset is not None and PY2 and not decode_keys:
+            key = try_coerce_native(key)
+        yield key, url_unquote_plus(value, charset, errors)
+
+
+def url_encode(
+    obj, charset="utf-8", encode_keys=False, sort=False, key=None, separator=b"&"
+):
+    """URL encode a dict/`MultiDict`.  If a value is `None` it will not appear
+    in the result string.  Per default only values are encoded into the target
+    charset strings.  If `encode_keys` is set to ``True`` unicode keys are
+    supported too.
+
+    If `sort` is set to `True` the items are sorted by `key` or the default
+    sorting algorithm.
+
+    .. versionadded:: 0.5
+        `sort`, `key`, and `separator` were added.
+
+    :param obj: the object to encode into a query string.
+    :param charset: the charset of the query string.
+    :param encode_keys: set to `True` if you have unicode keys. (Ignored on
+                        Python 3.x)
+    :param sort: set to `True` if you want parameters to be sorted by `key`.
+    :param separator: the separator to be used for the pairs.
+    :param key: an optional function to be used for sorting.  For more details
+                check out the :func:`sorted` documentation.
+    """
+    separator = to_native(separator, "ascii")
+    return separator.join(_url_encode_impl(obj, charset, encode_keys, sort, key))
+
+
+def url_encode_stream(
+    obj,
+    stream=None,
+    charset="utf-8",
+    encode_keys=False,
+    sort=False,
+    key=None,
+    separator=b"&",
+):
+    """Like :meth:`url_encode` but writes the results to a stream
+    object.  If the stream is `None` a generator over all encoded
+    pairs is returned.
+
+    .. versionadded:: 0.8
+
+    :param obj: the object to encode into a query string.
+    :param stream: a stream to write the encoded object into or `None` if
+                   an iterator over the encoded pairs should be returned.  In
+                   that case the separator argument is ignored.
+    :param charset: the charset of the query string.
+    :param encode_keys: set to `True` if you have unicode keys. (Ignored on
+                        Python 3.x)
+    :param sort: set to `True` if you want parameters to be sorted by `key`.
+    :param separator: the separator to be used for the pairs.
+    :param key: an optional function to be used for sorting.  For more details
+                check out the :func:`sorted` documentation.
+    """
+    separator = to_native(separator, "ascii")
+    gen = _url_encode_impl(obj, charset, encode_keys, sort, key)
+    if stream is None:
+        return gen
+    for idx, chunk in enumerate(gen):
+        if idx:
+            stream.write(separator)
+        stream.write(chunk)
+
+
+def url_join(base, url, allow_fragments=True):
+    """Join a base URL and a possibly relative URL to form an absolute
+    interpretation of the latter.
+
+    :param base: the base URL for the join operation.
+    :param url: the URL to join.
+    :param allow_fragments: indicates whether fragments should be allowed.
+    """
+    if isinstance(base, tuple):
+        base = url_unparse(base)
+    if isinstance(url, tuple):
+        url = url_unparse(url)
+
+    base, url = normalize_string_tuple((base, url))
+    s = make_literal_wrapper(base)
+
+    if not base:
+        return url
+    if not url:
+        return base
+
+    bscheme, bnetloc, bpath, bquery, bfragment = url_parse(
+        base, allow_fragments=allow_fragments
+    )
+    scheme, netloc, path, query, fragment = url_parse(url, bscheme, allow_fragments)
+    if scheme != bscheme:
+        return url
+    if netloc:
+        return url_unparse((scheme, netloc, path, query, fragment))
+    netloc = bnetloc
+
+    if path[:1] == s("/"):
+        segments = path.split(s("/"))
+    elif not path:
+        segments = bpath.split(s("/"))
+        if not query:
+            query = bquery
+    else:
+        segments = bpath.split(s("/"))[:-1] + path.split(s("/"))
+
+    # If the rightmost part is "./" we want to keep the slash but
+    # remove the dot.
+    if segments[-1] == s("."):
+        segments[-1] = s("")
+
+    # Resolve ".." and "."
+    segments = [segment for segment in segments if segment != s(".")]
+    while 1:
+        i = 1
+        n = len(segments) - 1
+        while i < n:
+            if segments[i] == s("..") and segments[i - 1] not in (s(""), s("..")):
+                del segments[i - 1 : i + 1]
+                break
+            i += 1
+        else:
+            break
+
+    # Remove trailing ".." if the URL is absolute
+    unwanted_marker = [s(""), s("..")]
+    while segments[:2] == unwanted_marker:
+        del segments[1]
+
+    path = s("/").join(segments)
+    return url_unparse((scheme, netloc, path, query, fragment))
+
+
+class Href(object):
+    """Implements a callable that constructs URLs with the given base. The
+    function can be called with any number of positional and keyword
+    arguments which than are used to assemble the URL.  Works with URLs
+    and posix paths.
+
+    Positional arguments are appended as individual segments to
+    the path of the URL:
+
+    >>> href = Href('/foo')
+    >>> href('bar', 23)
+    '/foo/bar/23'
+    >>> href('foo', bar=23)
+    '/foo/foo?bar=23'
+
+    If any of the arguments (positional or keyword) evaluates to `None` it
+    will be skipped.  If no keyword arguments are given the last argument
+    can be a :class:`dict` or :class:`MultiDict` (or any other dict subclass),
+    otherwise the keyword arguments are used for the query parameters, cutting
+    off the first trailing underscore of the parameter name:
+
+    >>> href(is_=42)
+    '/foo?is=42'
+    >>> href({'foo': 'bar'})
+    '/foo?foo=bar'
+
+    Combining of both methods is not allowed:
+
+    >>> href({'foo': 'bar'}, bar=42)
+    Traceback (most recent call last):
+      ...
+    TypeError: keyword arguments and query-dicts can't be combined
+
+    Accessing attributes on the href object creates a new href object with
+    the attribute name as prefix:
+
+    >>> bar_href = href.bar
+    >>> bar_href("blub")
+    '/foo/bar/blub'
+
+    If `sort` is set to `True` the items are sorted by `key` or the default
+    sorting algorithm:
+
+    >>> href = Href("/", sort=True)
+    >>> href(a=1, b=2, c=3)
+    '/?a=1&b=2&c=3'
+
+    .. versionadded:: 0.5
+        `sort` and `key` were added.
+    """
+
+    def __init__(self, base="./", charset="utf-8", sort=False, key=None):
+        if not base:
+            base = "./"
+        self.base = base
+        self.charset = charset
+        self.sort = sort
+        self.key = key
+
+    def __getattr__(self, name):
+        if name[:2] == "__":
+            raise AttributeError(name)
+        base = self.base
+        if base[-1:] != "/":
+            base += "/"
+        return Href(url_join(base, name), self.charset, self.sort, self.key)
+
+    def __call__(self, *path, **query):
+        if path and isinstance(path[-1], dict):
+            if query:
+                raise TypeError("keyword arguments and query-dicts can't be combined")
+            query, path = path[-1], path[:-1]
+        elif query:
+            query = dict(
+                [(k.endswith("_") and k[:-1] or k, v) for k, v in query.items()]
+            )
+        path = "/".join(
+            [
+                to_unicode(url_quote(x, self.charset), "ascii")
+                for x in path
+                if x is not None
+            ]
+        ).lstrip("/")
+        rv = self.base
+        if path:
+            if not rv.endswith("/"):
+                rv += "/"
+            rv = url_join(rv, "./" + path)
+        if query:
+            rv += "?" + to_unicode(
+                url_encode(query, self.charset, sort=self.sort, key=self.key), "ascii"
+            )
+        return to_native(rv)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/useragents.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/useragents.py
new file mode 100644
index 0000000..6ef6e2b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/useragents.py
@@ -0,0 +1,202 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.useragents
+    ~~~~~~~~~~~~~~~~~~~
+
+    This module provides a helper to inspect user agent strings.  This module
+    is far from complete but should work for most of the currently available
+    browsers.
+
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import re
+
+
+class UserAgentParser(object):
+    """A simple user agent parser.  Used by the `UserAgent`."""
+
+    platforms = (
+        (" cros ", "chromeos"),
+        ("iphone|ios", "iphone"),
+        ("ipad", "ipad"),
+        (r"darwin|mac|os\s*x", "macos"),
+        ("win", "windows"),
+        (r"android", "android"),
+        ("netbsd", "netbsd"),
+        ("openbsd", "openbsd"),
+        ("freebsd", "freebsd"),
+        ("dragonfly", "dragonflybsd"),
+        ("(sun|i86)os", "solaris"),
+        (r"x11|lin(\b|ux)?", "linux"),
+        (r"nintendo\s+wii", "wii"),
+        ("irix", "irix"),
+        ("hp-?ux", "hpux"),
+        ("aix", "aix"),
+        ("sco|unix_sv", "sco"),
+        ("bsd", "bsd"),
+        ("amiga", "amiga"),
+        ("blackberry|playbook", "blackberry"),
+        ("symbian", "symbian"),
+    )
+    browsers = (
+        ("googlebot", "google"),
+        ("msnbot", "msn"),
+        ("yahoo", "yahoo"),
+        ("ask jeeves", "ask"),
+        (r"aol|america\s+online\s+browser", "aol"),
+        (r"opera|opr", "opera"),
+        ("edge", "edge"),
+        ("chrome|crios", "chrome"),
+        ("seamonkey", "seamonkey"),
+        ("firefox|firebird|phoenix|iceweasel", "firefox"),
+        ("galeon", "galeon"),
+        ("safari|version", "safari"),
+        ("webkit", "webkit"),
+        ("camino", "camino"),
+        ("konqueror", "konqueror"),
+        ("k-meleon", "kmeleon"),
+        ("netscape", "netscape"),
+        (r"msie|microsoft\s+internet\s+explorer|trident/.+? rv:", "msie"),
+        ("lynx", "lynx"),
+        ("links", "links"),
+        ("Baiduspider", "baidu"),
+        ("bingbot", "bing"),
+        ("mozilla", "mozilla"),
+    )
+
+    _browser_version_re = r"(?:%s)[/\sa-z(]*(\d+[.\da-z]+)?"
+    _language_re = re.compile(
+        r"(?:;\s*|\s+)(\b\w{2}\b(?:-\b\w{2}\b)?)\s*;|"
+        r"(?:\(|\[|;)\s*(\b\w{2}\b(?:-\b\w{2}\b)?)\s*(?:\]|\)|;)"
+    )
+
+    def __init__(self):
+        self.platforms = [(b, re.compile(a, re.I)) for a, b in self.platforms]
+        self.browsers = [
+            (b, re.compile(self._browser_version_re % a, re.I))
+            for a, b in self.browsers
+        ]
+
+    def __call__(self, user_agent):
+        for platform, regex in self.platforms:  # noqa: B007
+            match = regex.search(user_agent)
+            if match is not None:
+                break
+        else:
+            platform = None
+        for browser, regex in self.browsers:  # noqa: B007
+            match = regex.search(user_agent)
+            if match is not None:
+                version = match.group(1)
+                break
+        else:
+            browser = version = None
+        match = self._language_re.search(user_agent)
+        if match is not None:
+            language = match.group(1) or match.group(2)
+        else:
+            language = None
+        return platform, browser, version, language
+
+
+class UserAgent(object):
+    """Represents a user agent.  Pass it a WSGI environment or a user agent
+    string and you can inspect some of the details from the user agent
+    string via the attributes.  The following attributes exist:
+
+    .. attribute:: string
+
+       the raw user agent string
+
+    .. attribute:: platform
+
+       the browser platform. ``None`` if not recognized.
+       The following platforms are currently recognized:
+
+       -   `aix`
+       -   `amiga`
+       -   `android`
+       -   `blackberry`
+       -   `bsd`
+       -   `chromeos`
+       -   `dragonflybsd`
+       -   `freebsd`
+       -   `hpux`
+       -   `ipad`
+       -   `iphone`
+       -   `irix`
+       -   `linux`
+       -   `macos`
+       -   `netbsd`
+       -   `openbsd`
+       -   `sco`
+       -   `solaris`
+       -   `symbian`
+       -   `wii`
+       -   `windows`
+
+    .. attribute:: browser
+
+        the name of the browser. ``None`` if not recognized.
+        The following browsers are currently recognized:
+
+        -   `aol` *
+        -   `ask` *
+        -   `baidu` *
+        -   `bing` *
+        -   `camino`
+        -   `chrome`
+        -   `edge`
+        -   `firefox`
+        -   `galeon`
+        -   `google` *
+        -   `kmeleon`
+        -   `konqueror`
+        -   `links`
+        -   `lynx`
+        -   `mozilla`
+        -   `msie`
+        -   `msn`
+        -   `netscape`
+        -   `opera`
+        -   `safari`
+        -   `seamonkey`
+        -   `webkit`
+        -   `yahoo` *
+
+        (Browsers marked with a star (``*``) are crawlers.)
+
+    .. attribute:: version
+
+        the version of the browser. ``None`` if not recognized.
+
+    .. attribute:: language
+
+        the language of the browser. ``None`` if not recognized.
+    """
+
+    _parser = UserAgentParser()
+
+    def __init__(self, environ_or_string):
+        if isinstance(environ_or_string, dict):
+            environ_or_string = environ_or_string.get("HTTP_USER_AGENT", "")
+        self.string = environ_or_string
+        self.platform, self.browser, self.version, self.language = self._parser(
+            environ_or_string
+        )
+
+    def to_header(self):
+        return self.string
+
+    def __str__(self):
+        return self.string
+
+    def __nonzero__(self):
+        return bool(self.browser)
+
+    __bool__ = __nonzero__
+
+    def __repr__(self):
+        return "<%s %r/%s>" % (self.__class__.__name__, self.browser, self.version)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/utils.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/utils.py
new file mode 100644
index 0000000..59c6f27
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/utils.py
@@ -0,0 +1,778 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.utils
+    ~~~~~~~~~~~~~~
+
+    This module implements various utilities for WSGI applications.  Most of
+    them are used by the request and response wrappers but especially for
+    middleware development it makes sense to use them without the wrappers.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import codecs
+import os
+import pkgutil
+import re
+import sys
+
+from ._compat import iteritems
+from ._compat import PY2
+from ._compat import reraise
+from ._compat import string_types
+from ._compat import text_type
+from ._compat import unichr
+from ._internal import _DictAccessorProperty
+from ._internal import _missing
+from ._internal import _parse_signature
+
+try:
+    from html.entities import name2codepoint
+except ImportError:
+    from htmlentitydefs import name2codepoint
+
+
+_format_re = re.compile(r"\$(?:(%s)|\{(%s)\})" % (("[a-zA-Z_][a-zA-Z0-9_]*",) * 2))
+_entity_re = re.compile(r"&([^;]+);")
+_filename_ascii_strip_re = re.compile(r"[^A-Za-z0-9_.-]")
+_windows_device_files = (
+    "CON",
+    "AUX",
+    "COM1",
+    "COM2",
+    "COM3",
+    "COM4",
+    "LPT1",
+    "LPT2",
+    "LPT3",
+    "PRN",
+    "NUL",
+)
+
+
+class cached_property(property):
+    """A decorator that converts a function into a lazy property.  The
+    function wrapped is called the first time to retrieve the result
+    and then that calculated result is used the next time you access
+    the value::
+
+        class Foo(object):
+
+            @cached_property
+            def foo(self):
+                # calculate something important here
+                return 42
+
+    The class has to have a `__dict__` in order for this property to
+    work.
+    """
+
+    # implementation detail: A subclass of python's builtin property
+    # decorator, we override __get__ to check for a cached value. If one
+    # chooses to invoke __get__ by hand the property will still work as
+    # expected because the lookup logic is replicated in __get__ for
+    # manual invocation.
+
+    def __init__(self, func, name=None, doc=None):
+        self.__name__ = name or func.__name__
+        self.__module__ = func.__module__
+        self.__doc__ = doc or func.__doc__
+        self.func = func
+
+    def __set__(self, obj, value):
+        obj.__dict__[self.__name__] = value
+
+    def __get__(self, obj, type=None):
+        if obj is None:
+            return self
+        value = obj.__dict__.get(self.__name__, _missing)
+        if value is _missing:
+            value = self.func(obj)
+            obj.__dict__[self.__name__] = value
+        return value
+
+
+def invalidate_cached_property(obj, name):
+    """Invalidates the cache for a :class:`cached_property`:
+
+    >>> class Test(object):
+    ...     @cached_property
+    ...     def magic_number(self):
+    ...         print("recalculating...")
+    ...         return 42
+    ...
+    >>> var = Test()
+    >>> var.magic_number
+    recalculating...
+    42
+    >>> var.magic_number
+    42
+    >>> invalidate_cached_property(var, "magic_number")
+    >>> var.magic_number
+    recalculating...
+    42
+
+    You must pass the name of the cached property as the second argument.
+    """
+    if not isinstance(getattr(obj.__class__, name, None), cached_property):
+        raise TypeError(
+            "Attribute {} of object {} is not a cached_property, "
+            "cannot be invalidated".format(name, obj)
+        )
+    obj.__dict__[name] = _missing
+
+
+class environ_property(_DictAccessorProperty):
+    """Maps request attributes to environment variables. This works not only
+    for the Werzeug request object, but also any other class with an
+    environ attribute:
+
+    >>> class Test(object):
+    ...     environ = {'key': 'value'}
+    ...     test = environ_property('key')
+    >>> var = Test()
+    >>> var.test
+    'value'
+
+    If you pass it a second value it's used as default if the key does not
+    exist, the third one can be a converter that takes a value and converts
+    it.  If it raises :exc:`ValueError` or :exc:`TypeError` the default value
+    is used. If no default value is provided `None` is used.
+
+    Per default the property is read only.  You have to explicitly enable it
+    by passing ``read_only=False`` to the constructor.
+    """
+
+    read_only = True
+
+    def lookup(self, obj):
+        return obj.environ
+
+
+class header_property(_DictAccessorProperty):
+    """Like `environ_property` but for headers."""
+
+    def lookup(self, obj):
+        return obj.headers
+
+
+class HTMLBuilder(object):
+    """Helper object for HTML generation.
+
+    Per default there are two instances of that class.  The `html` one, and
+    the `xhtml` one for those two dialects.  The class uses keyword parameters
+    and positional parameters to generate small snippets of HTML.
+
+    Keyword parameters are converted to XML/SGML attributes, positional
+    arguments are used as children.  Because Python accepts positional
+    arguments before keyword arguments it's a good idea to use a list with the
+    star-syntax for some children:
+
+    >>> html.p(class_='foo', *[html.a('foo', href='foo.html'), ' ',
+    ...                        html.a('bar', href='bar.html')])
+    u'<p class="foo"><a href="foo.html">foo</a> <a href="bar.html">bar</a></p>'
+
+    This class works around some browser limitations and can not be used for
+    arbitrary SGML/XML generation.  For that purpose lxml and similar
+    libraries exist.
+
+    Calling the builder escapes the string passed:
+
+    >>> html.p(html("<foo>"))
+    u'<p>&lt;foo&gt;</p>'
+    """
+
+    _entity_re = re.compile(r"&([^;]+);")
+    _entities = name2codepoint.copy()
+    _entities["apos"] = 39
+    _empty_elements = {
+        "area",
+        "base",
+        "basefont",
+        "br",
+        "col",
+        "command",
+        "embed",
+        "frame",
+        "hr",
+        "img",
+        "input",
+        "keygen",
+        "isindex",
+        "link",
+        "meta",
+        "param",
+        "source",
+        "wbr",
+    }
+    _boolean_attributes = {
+        "selected",
+        "checked",
+        "compact",
+        "declare",
+        "defer",
+        "disabled",
+        "ismap",
+        "multiple",
+        "nohref",
+        "noresize",
+        "noshade",
+        "nowrap",
+    }
+    _plaintext_elements = {"textarea"}
+    _c_like_cdata = {"script", "style"}
+
+    def __init__(self, dialect):
+        self._dialect = dialect
+
+    def __call__(self, s):
+        return escape(s)
+
+    def __getattr__(self, tag):
+        if tag[:2] == "__":
+            raise AttributeError(tag)
+
+        def proxy(*children, **arguments):
+            buffer = "<" + tag
+            for key, value in iteritems(arguments):
+                if value is None:
+                    continue
+                if key[-1] == "_":
+                    key = key[:-1]
+                if key in self._boolean_attributes:
+                    if not value:
+                        continue
+                    if self._dialect == "xhtml":
+                        value = '="' + key + '"'
+                    else:
+                        value = ""
+                else:
+                    value = '="' + escape(value) + '"'
+                buffer += " " + key + value
+            if not children and tag in self._empty_elements:
+                if self._dialect == "xhtml":
+                    buffer += " />"
+                else:
+                    buffer += ">"
+                return buffer
+            buffer += ">"
+
+            children_as_string = "".join(
+                [text_type(x) for x in children if x is not None]
+            )
+
+            if children_as_string:
+                if tag in self._plaintext_elements:
+                    children_as_string = escape(children_as_string)
+                elif tag in self._c_like_cdata and self._dialect == "xhtml":
+                    children_as_string = (
+                        "/*<![CDATA[*/" + children_as_string + "/*]]>*/"
+                    )
+            buffer += children_as_string + "</" + tag + ">"
+            return buffer
+
+        return proxy
+
+    def __repr__(self):
+        return "<%s for %r>" % (self.__class__.__name__, self._dialect)
+
+
+html = HTMLBuilder("html")
+xhtml = HTMLBuilder("xhtml")
+
+# https://cgit.freedesktop.org/xdg/shared-mime-info/tree/freedesktop.org.xml.in
+# https://www.iana.org/assignments/media-types/media-types.xhtml
+# Types listed in the XDG mime info that have a charset in the IANA registration.
+_charset_mimetypes = {
+    "application/ecmascript",
+    "application/javascript",
+    "application/sql",
+    "application/xml",
+    "application/xml-dtd",
+    "application/xml-external-parsed-entity",
+}
+
+
+def get_content_type(mimetype, charset):
+    """Returns the full content type string with charset for a mimetype.
+
+    If the mimetype represents text, the charset parameter will be
+    appended, otherwise the mimetype is returned unchanged.
+
+    :param mimetype: The mimetype to be used as content type.
+    :param charset: The charset to be appended for text mimetypes.
+    :return: The content type.
+
+    .. versionchanged:: 0.15
+        Any type that ends with ``+xml`` gets a charset, not just those
+        that start with ``application/``. Known text types such as
+        ``application/javascript`` are also given charsets.
+    """
+    if (
+        mimetype.startswith("text/")
+        or mimetype in _charset_mimetypes
+        or mimetype.endswith("+xml")
+    ):
+        mimetype += "; charset=" + charset
+
+    return mimetype
+
+
+def detect_utf_encoding(data):
+    """Detect which UTF encoding was used to encode the given bytes.
+
+    The latest JSON standard (:rfc:`8259`) suggests that only UTF-8 is
+    accepted. Older documents allowed 8, 16, or 32. 16 and 32 can be big
+    or little endian. Some editors or libraries may prepend a BOM.
+
+    :internal:
+
+    :param data: Bytes in unknown UTF encoding.
+    :return: UTF encoding name
+
+    .. versionadded:: 0.15
+    """
+    head = data[:4]
+
+    if head[:3] == codecs.BOM_UTF8:
+        return "utf-8-sig"
+
+    if b"\x00" not in head:
+        return "utf-8"
+
+    if head in (codecs.BOM_UTF32_BE, codecs.BOM_UTF32_LE):
+        return "utf-32"
+
+    if head[:2] in (codecs.BOM_UTF16_BE, codecs.BOM_UTF16_LE):
+        return "utf-16"
+
+    if len(head) == 4:
+        if head[:3] == b"\x00\x00\x00":
+            return "utf-32-be"
+
+        if head[::2] == b"\x00\x00":
+            return "utf-16-be"
+
+        if head[1:] == b"\x00\x00\x00":
+            return "utf-32-le"
+
+        if head[1::2] == b"\x00\x00":
+            return "utf-16-le"
+
+    if len(head) == 2:
+        return "utf-16-be" if head.startswith(b"\x00") else "utf-16-le"
+
+    return "utf-8"
+
+
+def format_string(string, context):
+    """String-template format a string:
+
+    >>> format_string('$foo and ${foo}s', dict(foo=42))
+    '42 and 42s'
+
+    This does not do any attribute lookup etc.  For more advanced string
+    formattings have a look at the `werkzeug.template` module.
+
+    :param string: the format string.
+    :param context: a dict with the variables to insert.
+    """
+
+    def lookup_arg(match):
+        x = context[match.group(1) or match.group(2)]
+        if not isinstance(x, string_types):
+            x = type(string)(x)
+        return x
+
+    return _format_re.sub(lookup_arg, string)
+
+
+def secure_filename(filename):
+    r"""Pass it a filename and it will return a secure version of it.  This
+    filename can then safely be stored on a regular file system and passed
+    to :func:`os.path.join`.  The filename returned is an ASCII only string
+    for maximum portability.
+
+    On windows systems the function also makes sure that the file is not
+    named after one of the special device files.
+
+    >>> secure_filename("My cool movie.mov")
+    'My_cool_movie.mov'
+    >>> secure_filename("../../../etc/passwd")
+    'etc_passwd'
+    >>> secure_filename(u'i contain cool \xfcml\xe4uts.txt')
+    'i_contain_cool_umlauts.txt'
+
+    The function might return an empty filename.  It's your responsibility
+    to ensure that the filename is unique and that you abort or
+    generate a random filename if the function returned an empty one.
+
+    .. versionadded:: 0.5
+
+    :param filename: the filename to secure
+    """
+    if isinstance(filename, text_type):
+        from unicodedata import normalize
+
+        filename = normalize("NFKD", filename).encode("ascii", "ignore")
+        if not PY2:
+            filename = filename.decode("ascii")
+    for sep in os.path.sep, os.path.altsep:
+        if sep:
+            filename = filename.replace(sep, " ")
+    filename = str(_filename_ascii_strip_re.sub("", "_".join(filename.split()))).strip(
+        "._"
+    )
+
+    # on nt a couple of special files are present in each folder.  We
+    # have to ensure that the target file is not such a filename.  In
+    # this case we prepend an underline
+    if (
+        os.name == "nt"
+        and filename
+        and filename.split(".")[0].upper() in _windows_device_files
+    ):
+        filename = "_" + filename
+
+    return filename
+
+
+def escape(s):
+    """Replace special characters "&", "<", ">" and (") to HTML-safe sequences.
+
+    There is a special handling for `None` which escapes to an empty string.
+
+    .. versionchanged:: 0.9
+       `quote` is now implicitly on.
+
+    :param s: the string to escape.
+    :param quote: ignored.
+    """
+    if s is None:
+        return ""
+    elif hasattr(s, "__html__"):
+        return text_type(s.__html__())
+
+    if not isinstance(s, string_types):
+        s = text_type(s)
+
+    return (
+        s.replace("&", "&amp;")
+        .replace("<", "&lt;")
+        .replace(">", "&gt;")
+        .replace('"', "&quot;")
+    )
+
+
+def unescape(s):
+    """The reverse function of `escape`.  This unescapes all the HTML
+    entities, not only the XML entities inserted by `escape`.
+
+    :param s: the string to unescape.
+    """
+
+    def handle_match(m):
+        name = m.group(1)
+        if name in HTMLBuilder._entities:
+            return unichr(HTMLBuilder._entities[name])
+        try:
+            if name[:2] in ("#x", "#X"):
+                return unichr(int(name[2:], 16))
+            elif name.startswith("#"):
+                return unichr(int(name[1:]))
+        except ValueError:
+            pass
+        return u""
+
+    return _entity_re.sub(handle_match, s)
+
+
+def redirect(location, code=302, Response=None):
+    """Returns a response object (a WSGI application) that, if called,
+    redirects the client to the target location. Supported codes are
+    301, 302, 303, 305, 307, and 308. 300 is not supported because
+    it's not a real redirect and 304 because it's the answer for a
+    request with a request with defined If-Modified-Since headers.
+
+    .. versionadded:: 0.6
+       The location can now be a unicode string that is encoded using
+       the :func:`iri_to_uri` function.
+
+    .. versionadded:: 0.10
+        The class used for the Response object can now be passed in.
+
+    :param location: the location the response should redirect to.
+    :param code: the redirect status code. defaults to 302.
+    :param class Response: a Response class to use when instantiating a
+        response. The default is :class:`werkzeug.wrappers.Response` if
+        unspecified.
+    """
+    if Response is None:
+        from .wrappers import Response
+
+    display_location = escape(location)
+    if isinstance(location, text_type):
+        # Safe conversion is necessary here as we might redirect
+        # to a broken URI scheme (for instance itms-services).
+        from .urls import iri_to_uri
+
+        location = iri_to_uri(location, safe_conversion=True)
+    response = Response(
+        '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">\n'
+        "<title>Redirecting...</title>\n"
+        "<h1>Redirecting...</h1>\n"
+        "<p>You should be redirected automatically to target URL: "
+        '<a href="%s">%s</a>.  If not click the link.'
+        % (escape(location), display_location),
+        code,
+        mimetype="text/html",
+    )
+    response.headers["Location"] = location
+    return response
+
+
+def append_slash_redirect(environ, code=301):
+    """Redirects to the same URL but with a slash appended.  The behavior
+    of this function is undefined if the path ends with a slash already.
+
+    :param environ: the WSGI environment for the request that triggers
+                    the redirect.
+    :param code: the status code for the redirect.
+    """
+    new_path = environ["PATH_INFO"].strip("/") + "/"
+    query_string = environ.get("QUERY_STRING")
+    if query_string:
+        new_path += "?" + query_string
+    return redirect(new_path, code)
+
+
+def import_string(import_name, silent=False):
+    """Imports an object based on a string.  This is useful if you want to
+    use import paths as endpoints or something similar.  An import path can
+    be specified either in dotted notation (``xml.sax.saxutils.escape``)
+    or with a colon as object delimiter (``xml.sax.saxutils:escape``).
+
+    If `silent` is True the return value will be `None` if the import fails.
+
+    :param import_name: the dotted name for the object to import.
+    :param silent: if set to `True` import errors are ignored and
+                   `None` is returned instead.
+    :return: imported object
+    """
+    # force the import name to automatically convert to strings
+    # __import__ is not able to handle unicode strings in the fromlist
+    # if the module is a package
+    import_name = str(import_name).replace(":", ".")
+    try:
+        try:
+            __import__(import_name)
+        except ImportError:
+            if "." not in import_name:
+                raise
+        else:
+            return sys.modules[import_name]
+
+        module_name, obj_name = import_name.rsplit(".", 1)
+        module = __import__(module_name, globals(), locals(), [obj_name])
+        try:
+            return getattr(module, obj_name)
+        except AttributeError as e:
+            raise ImportError(e)
+
+    except ImportError as e:
+        if not silent:
+            reraise(
+                ImportStringError, ImportStringError(import_name, e), sys.exc_info()[2]
+            )
+
+
+def find_modules(import_path, include_packages=False, recursive=False):
+    """Finds all the modules below a package.  This can be useful to
+    automatically import all views / controllers so that their metaclasses /
+    function decorators have a chance to register themselves on the
+    application.
+
+    Packages are not returned unless `include_packages` is `True`.  This can
+    also recursively list modules but in that case it will import all the
+    packages to get the correct load path of that module.
+
+    :param import_path: the dotted name for the package to find child modules.
+    :param include_packages: set to `True` if packages should be returned, too.
+    :param recursive: set to `True` if recursion should happen.
+    :return: generator
+    """
+    module = import_string(import_path)
+    path = getattr(module, "__path__", None)
+    if path is None:
+        raise ValueError("%r is not a package" % import_path)
+    basename = module.__name__ + "."
+    for _importer, modname, ispkg in pkgutil.iter_modules(path):
+        modname = basename + modname
+        if ispkg:
+            if include_packages:
+                yield modname
+            if recursive:
+                for item in find_modules(modname, include_packages, True):
+                    yield item
+        else:
+            yield modname
+
+
+def validate_arguments(func, args, kwargs, drop_extra=True):
+    """Checks if the function accepts the arguments and keyword arguments.
+    Returns a new ``(args, kwargs)`` tuple that can safely be passed to
+    the function without causing a `TypeError` because the function signature
+    is incompatible.  If `drop_extra` is set to `True` (which is the default)
+    any extra positional or keyword arguments are dropped automatically.
+
+    The exception raised provides three attributes:
+
+    `missing`
+        A set of argument names that the function expected but where
+        missing.
+
+    `extra`
+        A dict of keyword arguments that the function can not handle but
+        where provided.
+
+    `extra_positional`
+        A list of values that where given by positional argument but the
+        function cannot accept.
+
+    This can be useful for decorators that forward user submitted data to
+    a view function::
+
+        from werkzeug.utils import ArgumentValidationError, validate_arguments
+
+        def sanitize(f):
+            def proxy(request):
+                data = request.values.to_dict()
+                try:
+                    args, kwargs = validate_arguments(f, (request,), data)
+                except ArgumentValidationError:
+                    raise BadRequest('The browser failed to transmit all '
+                                     'the data expected.')
+                return f(*args, **kwargs)
+            return proxy
+
+    :param func: the function the validation is performed against.
+    :param args: a tuple of positional arguments.
+    :param kwargs: a dict of keyword arguments.
+    :param drop_extra: set to `False` if you don't want extra arguments
+                       to be silently dropped.
+    :return: tuple in the form ``(args, kwargs)``.
+    """
+    parser = _parse_signature(func)
+    args, kwargs, missing, extra, extra_positional = parser(args, kwargs)[:5]
+    if missing:
+        raise ArgumentValidationError(tuple(missing))
+    elif (extra or extra_positional) and not drop_extra:
+        raise ArgumentValidationError(None, extra, extra_positional)
+    return tuple(args), kwargs
+
+
+def bind_arguments(func, args, kwargs):
+    """Bind the arguments provided into a dict.  When passed a function,
+    a tuple of arguments and a dict of keyword arguments `bind_arguments`
+    returns a dict of names as the function would see it.  This can be useful
+    to implement a cache decorator that uses the function arguments to build
+    the cache key based on the values of the arguments.
+
+    :param func: the function the arguments should be bound for.
+    :param args: tuple of positional arguments.
+    :param kwargs: a dict of keyword arguments.
+    :return: a :class:`dict` of bound keyword arguments.
+    """
+    (
+        args,
+        kwargs,
+        missing,
+        extra,
+        extra_positional,
+        arg_spec,
+        vararg_var,
+        kwarg_var,
+    ) = _parse_signature(func)(args, kwargs)
+    values = {}
+    for (name, _has_default, _default), value in zip(arg_spec, args):
+        values[name] = value
+    if vararg_var is not None:
+        values[vararg_var] = tuple(extra_positional)
+    elif extra_positional:
+        raise TypeError("too many positional arguments")
+    if kwarg_var is not None:
+        multikw = set(extra) & set([x[0] for x in arg_spec])
+        if multikw:
+            raise TypeError(
+                "got multiple values for keyword argument " + repr(next(iter(multikw)))
+            )
+        values[kwarg_var] = extra
+    elif extra:
+        raise TypeError("got unexpected keyword argument " + repr(next(iter(extra))))
+    return values
+
+
+class ArgumentValidationError(ValueError):
+
+    """Raised if :func:`validate_arguments` fails to validate"""
+
+    def __init__(self, missing=None, extra=None, extra_positional=None):
+        self.missing = set(missing or ())
+        self.extra = extra or {}
+        self.extra_positional = extra_positional or []
+        ValueError.__init__(
+            self,
+            "function arguments invalid. (%d missing, %d additional)"
+            % (len(self.missing), len(self.extra) + len(self.extra_positional)),
+        )
+
+
+class ImportStringError(ImportError):
+    """Provides information about a failed :func:`import_string` attempt."""
+
+    #: String in dotted notation that failed to be imported.
+    import_name = None
+    #: Wrapped exception.
+    exception = None
+
+    def __init__(self, import_name, exception):
+        self.import_name = import_name
+        self.exception = exception
+
+        msg = (
+            "import_string() failed for %r. Possible reasons are:\n\n"
+            "- missing __init__.py in a package;\n"
+            "- package or module path not included in sys.path;\n"
+            "- duplicated package or module name taking precedence in "
+            "sys.path;\n"
+            "- missing module, class, function or variable;\n\n"
+            "Debugged import:\n\n%s\n\n"
+            "Original exception:\n\n%s: %s"
+        )
+
+        name = ""
+        tracked = []
+        for part in import_name.replace(":", ".").split("."):
+            name += (name and ".") + part
+            imported = import_string(name, silent=True)
+            if imported:
+                tracked.append((name, getattr(imported, "__file__", None)))
+            else:
+                track = ["- %r found in %r." % (n, i) for n, i in tracked]
+                track.append("- %r not found." % name)
+                msg = msg % (
+                    import_name,
+                    "\n".join(track),
+                    exception.__class__.__name__,
+                    str(exception),
+                )
+                break
+
+        ImportError.__init__(self, msg)
+
+    def __repr__(self):
+        return "<%s(%r, %r)>" % (
+            self.__class__.__name__,
+            self.import_name,
+            self.exception,
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/__init__.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/__init__.py
new file mode 100644
index 0000000..56c764a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/__init__.py
@@ -0,0 +1,36 @@
+"""
+werkzeug.wrappers
+~~~~~~~~~~~~~~~~~
+
+The wrappers are simple request and response objects which you can
+subclass to do whatever you want them to do.  The request object contains
+the information transmitted by the client (webbrowser) and the response
+object contains all the information sent back to the browser.
+
+An important detail is that the request object is created with the WSGI
+environ and will act as high-level proxy whereas the response object is an
+actual WSGI application.
+
+Like everything else in Werkzeug these objects will work correctly with
+unicode data.  Incoming form data parsed by the response object will be
+decoded into an unicode object if possible and if it makes sense.
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+from .accept import AcceptMixin
+from .auth import AuthorizationMixin
+from .auth import WWWAuthenticateMixin
+from .base_request import BaseRequest
+from .base_response import BaseResponse
+from .common_descriptors import CommonRequestDescriptorsMixin
+from .common_descriptors import CommonResponseDescriptorsMixin
+from .etag import ETagRequestMixin
+from .etag import ETagResponseMixin
+from .request import PlainRequest
+from .request import Request
+from .request import StreamOnlyMixin
+from .response import Response
+from .response import ResponseStream
+from .response import ResponseStreamMixin
+from .user_agent import UserAgentMixin
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diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/accept.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/accept.py
new file mode 100644
index 0000000..d0620a0
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/accept.py
@@ -0,0 +1,50 @@
+from ..datastructures import CharsetAccept
+from ..datastructures import LanguageAccept
+from ..datastructures import MIMEAccept
+from ..http import parse_accept_header
+from ..utils import cached_property
+
+
+class AcceptMixin(object):
+    """A mixin for classes with an :attr:`~BaseResponse.environ` attribute
+    to get all the HTTP accept headers as
+    :class:`~werkzeug.datastructures.Accept` objects (or subclasses
+    thereof).
+    """
+
+    @cached_property
+    def accept_mimetypes(self):
+        """List of mimetypes this client supports as
+        :class:`~werkzeug.datastructures.MIMEAccept` object.
+        """
+        return parse_accept_header(self.environ.get("HTTP_ACCEPT"), MIMEAccept)
+
+    @cached_property
+    def accept_charsets(self):
+        """List of charsets this client supports as
+        :class:`~werkzeug.datastructures.CharsetAccept` object.
+        """
+        return parse_accept_header(
+            self.environ.get("HTTP_ACCEPT_CHARSET"), CharsetAccept
+        )
+
+    @cached_property
+    def accept_encodings(self):
+        """List of encodings this client accepts.  Encodings in a HTTP term
+        are compression encodings such as gzip.  For charsets have a look at
+        :attr:`accept_charset`.
+        """
+        return parse_accept_header(self.environ.get("HTTP_ACCEPT_ENCODING"))
+
+    @cached_property
+    def accept_languages(self):
+        """List of languages this client accepts as
+        :class:`~werkzeug.datastructures.LanguageAccept` object.
+
+        .. versionchanged 0.5
+           In previous versions this was a regular
+           :class:`~werkzeug.datastructures.Accept` object.
+        """
+        return parse_accept_header(
+            self.environ.get("HTTP_ACCEPT_LANGUAGE"), LanguageAccept
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/auth.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/auth.py
new file mode 100644
index 0000000..714f755
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/auth.py
@@ -0,0 +1,33 @@
+from ..http import parse_authorization_header
+from ..http import parse_www_authenticate_header
+from ..utils import cached_property
+
+
+class AuthorizationMixin(object):
+    """Adds an :attr:`authorization` property that represents the parsed
+    value of the `Authorization` header as
+    :class:`~werkzeug.datastructures.Authorization` object.
+    """
+
+    @cached_property
+    def authorization(self):
+        """The `Authorization` object in parsed form."""
+        header = self.environ.get("HTTP_AUTHORIZATION")
+        return parse_authorization_header(header)
+
+
+class WWWAuthenticateMixin(object):
+    """Adds a :attr:`www_authenticate` property to a response object."""
+
+    @property
+    def www_authenticate(self):
+        """The `WWW-Authenticate` header in a parsed form."""
+
+        def on_update(www_auth):
+            if not www_auth and "www-authenticate" in self.headers:
+                del self.headers["www-authenticate"]
+            elif www_auth:
+                self.headers["WWW-Authenticate"] = www_auth.to_header()
+
+        header = self.headers.get("www-authenticate")
+        return parse_www_authenticate_header(header, on_update)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/base_request.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/base_request.py
new file mode 100644
index 0000000..1f21db2
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/base_request.py
@@ -0,0 +1,673 @@
+from functools import update_wrapper
+from io import BytesIO
+
+from .._compat import to_native
+from .._compat import to_unicode
+from .._compat import wsgi_decoding_dance
+from .._compat import wsgi_get_bytes
+from ..datastructures import CombinedMultiDict
+from ..datastructures import EnvironHeaders
+from ..datastructures import ImmutableList
+from ..datastructures import ImmutableMultiDict
+from ..datastructures import iter_multi_items
+from ..datastructures import MultiDict
+from ..formparser import default_stream_factory
+from ..formparser import FormDataParser
+from ..http import parse_cookie
+from ..http import parse_list_header
+from ..http import parse_options_header
+from ..urls import url_decode
+from ..utils import cached_property
+from ..utils import environ_property
+from ..wsgi import get_content_length
+from ..wsgi import get_current_url
+from ..wsgi import get_host
+from ..wsgi import get_input_stream
+
+
+class BaseRequest(object):
+    """Very basic request object.  This does not implement advanced stuff like
+    entity tag parsing or cache controls.  The request object is created with
+    the WSGI environment as first argument and will add itself to the WSGI
+    environment as ``'werkzeug.request'`` unless it's created with
+    `populate_request` set to False.
+
+    There are a couple of mixins available that add additional functionality
+    to the request object, there is also a class called `Request` which
+    subclasses `BaseRequest` and all the important mixins.
+
+    It's a good idea to create a custom subclass of the :class:`BaseRequest`
+    and add missing functionality either via mixins or direct implementation.
+    Here an example for such subclasses::
+
+        from werkzeug.wrappers import BaseRequest, ETagRequestMixin
+
+        class Request(BaseRequest, ETagRequestMixin):
+            pass
+
+    Request objects are **read only**.  As of 0.5 modifications are not
+    allowed in any place.  Unlike the lower level parsing functions the
+    request object will use immutable objects everywhere possible.
+
+    Per default the request object will assume all the text data is `utf-8`
+    encoded.  Please refer to :doc:`the unicode chapter </unicode>` for more
+    details about customizing the behavior.
+
+    Per default the request object will be added to the WSGI
+    environment as `werkzeug.request` to support the debugging system.
+    If you don't want that, set `populate_request` to `False`.
+
+    If `shallow` is `True` the environment is initialized as shallow
+    object around the environ.  Every operation that would modify the
+    environ in any way (such as consuming form data) raises an exception
+    unless the `shallow` attribute is explicitly set to `False`.  This
+    is useful for middlewares where you don't want to consume the form
+    data by accident.  A shallow request is not populated to the WSGI
+    environment.
+
+    .. versionchanged:: 0.5
+       read-only mode was enforced by using immutables classes for all
+       data.
+    """
+
+    #: the charset for the request, defaults to utf-8
+    charset = "utf-8"
+
+    #: the error handling procedure for errors, defaults to 'replace'
+    encoding_errors = "replace"
+
+    #: the maximum content length.  This is forwarded to the form data
+    #: parsing function (:func:`parse_form_data`).  When set and the
+    #: :attr:`form` or :attr:`files` attribute is accessed and the
+    #: parsing fails because more than the specified value is transmitted
+    #: a :exc:`~werkzeug.exceptions.RequestEntityTooLarge` exception is raised.
+    #:
+    #: Have a look at :ref:`dealing-with-request-data` for more details.
+    #:
+    #: .. versionadded:: 0.5
+    max_content_length = None
+
+    #: the maximum form field size.  This is forwarded to the form data
+    #: parsing function (:func:`parse_form_data`).  When set and the
+    #: :attr:`form` or :attr:`files` attribute is accessed and the
+    #: data in memory for post data is longer than the specified value a
+    #: :exc:`~werkzeug.exceptions.RequestEntityTooLarge` exception is raised.
+    #:
+    #: Have a look at :ref:`dealing-with-request-data` for more details.
+    #:
+    #: .. versionadded:: 0.5
+    max_form_memory_size = None
+
+    #: the class to use for `args` and `form`.  The default is an
+    #: :class:`~werkzeug.datastructures.ImmutableMultiDict` which supports
+    #: multiple values per key.  alternatively it makes sense to use an
+    #: :class:`~werkzeug.datastructures.ImmutableOrderedMultiDict` which
+    #: preserves order or a :class:`~werkzeug.datastructures.ImmutableDict`
+    #: which is the fastest but only remembers the last key.  It is also
+    #: possible to use mutable structures, but this is not recommended.
+    #:
+    #: .. versionadded:: 0.6
+    parameter_storage_class = ImmutableMultiDict
+
+    #: the type to be used for list values from the incoming WSGI environment.
+    #: By default an :class:`~werkzeug.datastructures.ImmutableList` is used
+    #: (for example for :attr:`access_list`).
+    #:
+    #: .. versionadded:: 0.6
+    list_storage_class = ImmutableList
+
+    #: The type to be used for dict values from the incoming WSGI
+    #: environment. (For example for :attr:`cookies`.) By default an
+    #: :class:`~werkzeug.datastructures.ImmutableMultiDict` is used.
+    #:
+    #: .. versionchanged:: 1.0.0
+    #:     Changed to ``ImmutableMultiDict`` to support multiple values.
+    #:
+    #: .. versionadded:: 0.6
+    dict_storage_class = ImmutableMultiDict
+
+    #: The form data parser that shoud be used.  Can be replaced to customize
+    #: the form date parsing.
+    form_data_parser_class = FormDataParser
+
+    #: Optionally a list of hosts that is trusted by this request.  By default
+    #: all hosts are trusted which means that whatever the client sends the
+    #: host is will be accepted.
+    #:
+    #: Because `Host` and `X-Forwarded-Host` headers can be set to any value by
+    #: a malicious client, it is recommended to either set this property or
+    #: implement similar validation in the proxy (if application is being run
+    #: behind one).
+    #:
+    #: .. versionadded:: 0.9
+    trusted_hosts = None
+
+    #: Indicates whether the data descriptor should be allowed to read and
+    #: buffer up the input stream.  By default it's enabled.
+    #:
+    #: .. versionadded:: 0.9
+    disable_data_descriptor = False
+
+    def __init__(self, environ, populate_request=True, shallow=False):
+        self.environ = environ
+        if populate_request and not shallow:
+            self.environ["werkzeug.request"] = self
+        self.shallow = shallow
+
+    def __repr__(self):
+        # make sure the __repr__ even works if the request was created
+        # from an invalid WSGI environment.  If we display the request
+        # in a debug session we don't want the repr to blow up.
+        args = []
+        try:
+            args.append("'%s'" % to_native(self.url, self.url_charset))
+            args.append("[%s]" % self.method)
+        except Exception:
+            args.append("(invalid WSGI environ)")
+
+        return "<%s %s>" % (self.__class__.__name__, " ".join(args))
+
+    @property
+    def url_charset(self):
+        """The charset that is assumed for URLs.  Defaults to the value
+        of :attr:`charset`.
+
+        .. versionadded:: 0.6
+        """
+        return self.charset
+
+    @classmethod
+    def from_values(cls, *args, **kwargs):
+        """Create a new request object based on the values provided.  If
+        environ is given missing values are filled from there.  This method is
+        useful for small scripts when you need to simulate a request from an URL.
+        Do not use this method for unittesting, there is a full featured client
+        object (:class:`Client`) that allows to create multipart requests,
+        support for cookies etc.
+
+        This accepts the same options as the
+        :class:`~werkzeug.test.EnvironBuilder`.
+
+        .. versionchanged:: 0.5
+           This method now accepts the same arguments as
+           :class:`~werkzeug.test.EnvironBuilder`.  Because of this the
+           `environ` parameter is now called `environ_overrides`.
+
+        :return: request object
+        """
+        from ..test import EnvironBuilder
+
+        charset = kwargs.pop("charset", cls.charset)
+        kwargs["charset"] = charset
+        builder = EnvironBuilder(*args, **kwargs)
+        try:
+            return builder.get_request(cls)
+        finally:
+            builder.close()
+
+    @classmethod
+    def application(cls, f):
+        """Decorate a function as responder that accepts the request as
+        the last argument.  This works like the :func:`responder`
+        decorator but the function is passed the request object as the
+        last argument and the request object will be closed
+        automatically::
+
+            @Request.application
+            def my_wsgi_app(request):
+                return Response('Hello World!')
+
+        As of Werkzeug 0.14 HTTP exceptions are automatically caught and
+        converted to responses instead of failing.
+
+        :param f: the WSGI callable to decorate
+        :return: a new WSGI callable
+        """
+        #: return a callable that wraps the -2nd argument with the request
+        #: and calls the function with all the arguments up to that one and
+        #: the request.  The return value is then called with the latest
+        #: two arguments.  This makes it possible to use this decorator for
+        #: both standalone WSGI functions as well as bound methods and
+        #: partially applied functions.
+        from ..exceptions import HTTPException
+
+        def application(*args):
+            request = cls(args[-2])
+            with request:
+                try:
+                    resp = f(*args[:-2] + (request,))
+                except HTTPException as e:
+                    resp = e.get_response(args[-2])
+                return resp(*args[-2:])
+
+        return update_wrapper(application, f)
+
+    def _get_file_stream(
+        self, total_content_length, content_type, filename=None, content_length=None
+    ):
+        """Called to get a stream for the file upload.
+
+        This must provide a file-like class with `read()`, `readline()`
+        and `seek()` methods that is both writeable and readable.
+
+        The default implementation returns a temporary file if the total
+        content length is higher than 500KB.  Because many browsers do not
+        provide a content length for the files only the total content
+        length matters.
+
+        :param total_content_length: the total content length of all the
+                                     data in the request combined.  This value
+                                     is guaranteed to be there.
+        :param content_type: the mimetype of the uploaded file.
+        :param filename: the filename of the uploaded file.  May be `None`.
+        :param content_length: the length of this file.  This value is usually
+                               not provided because webbrowsers do not provide
+                               this value.
+        """
+        return default_stream_factory(
+            total_content_length=total_content_length,
+            filename=filename,
+            content_type=content_type,
+            content_length=content_length,
+        )
+
+    @property
+    def want_form_data_parsed(self):
+        """Returns True if the request method carries content.  As of
+        Werkzeug 0.9 this will be the case if a content type is transmitted.
+
+        .. versionadded:: 0.8
+        """
+        return bool(self.environ.get("CONTENT_TYPE"))
+
+    def make_form_data_parser(self):
+        """Creates the form data parser. Instantiates the
+        :attr:`form_data_parser_class` with some parameters.
+
+        .. versionadded:: 0.8
+        """
+        return self.form_data_parser_class(
+            self._get_file_stream,
+            self.charset,
+            self.encoding_errors,
+            self.max_form_memory_size,
+            self.max_content_length,
+            self.parameter_storage_class,
+        )
+
+    def _load_form_data(self):
+        """Method used internally to retrieve submitted data.  After calling
+        this sets `form` and `files` on the request object to multi dicts
+        filled with the incoming form data.  As a matter of fact the input
+        stream will be empty afterwards.  You can also call this method to
+        force the parsing of the form data.
+
+        .. versionadded:: 0.8
+        """
+        # abort early if we have already consumed the stream
+        if "form" in self.__dict__:
+            return
+
+        _assert_not_shallow(self)
+
+        if self.want_form_data_parsed:
+            content_type = self.environ.get("CONTENT_TYPE", "")
+            content_length = get_content_length(self.environ)
+            mimetype, options = parse_options_header(content_type)
+            parser = self.make_form_data_parser()
+            data = parser.parse(
+                self._get_stream_for_parsing(), mimetype, content_length, options
+            )
+        else:
+            data = (
+                self.stream,
+                self.parameter_storage_class(),
+                self.parameter_storage_class(),
+            )
+
+        # inject the values into the instance dict so that we bypass
+        # our cached_property non-data descriptor.
+        d = self.__dict__
+        d["stream"], d["form"], d["files"] = data
+
+    def _get_stream_for_parsing(self):
+        """This is the same as accessing :attr:`stream` with the difference
+        that if it finds cached data from calling :meth:`get_data` first it
+        will create a new stream out of the cached data.
+
+        .. versionadded:: 0.9.3
+        """
+        cached_data = getattr(self, "_cached_data", None)
+        if cached_data is not None:
+            return BytesIO(cached_data)
+        return self.stream
+
+    def close(self):
+        """Closes associated resources of this request object.  This
+        closes all file handles explicitly.  You can also use the request
+        object in a with statement which will automatically close it.
+
+        .. versionadded:: 0.9
+        """
+        files = self.__dict__.get("files")
+        for _key, value in iter_multi_items(files or ()):
+            value.close()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.close()
+
+    @cached_property
+    def stream(self):
+        """
+        If the incoming form data was not encoded with a known mimetype
+        the data is stored unmodified in this stream for consumption.  Most
+        of the time it is a better idea to use :attr:`data` which will give
+        you that data as a string.  The stream only returns the data once.
+
+        Unlike :attr:`input_stream` this stream is properly guarded that you
+        can't accidentally read past the length of the input.  Werkzeug will
+        internally always refer to this stream to read data which makes it
+        possible to wrap this object with a stream that does filtering.
+
+        .. versionchanged:: 0.9
+           This stream is now always available but might be consumed by the
+           form parser later on.  Previously the stream was only set if no
+           parsing happened.
+        """
+        _assert_not_shallow(self)
+        return get_input_stream(self.environ)
+
+    input_stream = environ_property(
+        "wsgi.input",
+        """The WSGI input stream.
+
+        In general it's a bad idea to use this one because you can
+        easily read past the boundary.  Use the :attr:`stream`
+        instead.""",
+    )
+
+    @cached_property
+    def args(self):
+        """The parsed URL parameters (the part in the URL after the question
+        mark).
+
+        By default an
+        :class:`~werkzeug.datastructures.ImmutableMultiDict`
+        is returned from this function.  This can be changed by setting
+        :attr:`parameter_storage_class` to a different type.  This might
+        be necessary if the order of the form data is important.
+        """
+        return url_decode(
+            wsgi_get_bytes(self.environ.get("QUERY_STRING", "")),
+            self.url_charset,
+            errors=self.encoding_errors,
+            cls=self.parameter_storage_class,
+        )
+
+    @cached_property
+    def data(self):
+        """
+        Contains the incoming request data as string in case it came with
+        a mimetype Werkzeug does not handle.
+        """
+
+        if self.disable_data_descriptor:
+            raise AttributeError("data descriptor is disabled")
+        # XXX: this should eventually be deprecated.
+
+        # We trigger form data parsing first which means that the descriptor
+        # will not cache the data that would otherwise be .form or .files
+        # data.  This restores the behavior that was there in Werkzeug
+        # before 0.9.  New code should use :meth:`get_data` explicitly as
+        # this will make behavior explicit.
+        return self.get_data(parse_form_data=True)
+
+    def get_data(self, cache=True, as_text=False, parse_form_data=False):
+        """This reads the buffered incoming data from the client into one
+        bytestring.  By default this is cached but that behavior can be
+        changed by setting `cache` to `False`.
+
+        Usually it's a bad idea to call this method without checking the
+        content length first as a client could send dozens of megabytes or more
+        to cause memory problems on the server.
+
+        Note that if the form data was already parsed this method will not
+        return anything as form data parsing does not cache the data like
+        this method does.  To implicitly invoke form data parsing function
+        set `parse_form_data` to `True`.  When this is done the return value
+        of this method will be an empty string if the form parser handles
+        the data.  This generally is not necessary as if the whole data is
+        cached (which is the default) the form parser will used the cached
+        data to parse the form data.  Please be generally aware of checking
+        the content length first in any case before calling this method
+        to avoid exhausting server memory.
+
+        If `as_text` is set to `True` the return value will be a decoded
+        unicode string.
+
+        .. versionadded:: 0.9
+        """
+        rv = getattr(self, "_cached_data", None)
+        if rv is None:
+            if parse_form_data:
+                self._load_form_data()
+            rv = self.stream.read()
+            if cache:
+                self._cached_data = rv
+        if as_text:
+            rv = rv.decode(self.charset, self.encoding_errors)
+        return rv
+
+    @cached_property
+    def form(self):
+        """The form parameters.  By default an
+        :class:`~werkzeug.datastructures.ImmutableMultiDict`
+        is returned from this function.  This can be changed by setting
+        :attr:`parameter_storage_class` to a different type.  This might
+        be necessary if the order of the form data is important.
+
+        Please keep in mind that file uploads will not end up here, but instead
+        in the :attr:`files` attribute.
+
+        .. versionchanged:: 0.9
+
+            Previous to Werkzeug 0.9 this would only contain form data for POST
+            and PUT requests.
+        """
+        self._load_form_data()
+        return self.form
+
+    @cached_property
+    def values(self):
+        """A :class:`werkzeug.datastructures.CombinedMultiDict` that combines
+        :attr:`args` and :attr:`form`."""
+        args = []
+        for d in self.args, self.form:
+            if not isinstance(d, MultiDict):
+                d = MultiDict(d)
+            args.append(d)
+        return CombinedMultiDict(args)
+
+    @cached_property
+    def files(self):
+        """:class:`~werkzeug.datastructures.MultiDict` object containing
+        all uploaded files.  Each key in :attr:`files` is the name from the
+        ``<input type="file" name="">``.  Each value in :attr:`files` is a
+        Werkzeug :class:`~werkzeug.datastructures.FileStorage` object.
+
+        It basically behaves like a standard file object you know from Python,
+        with the difference that it also has a
+        :meth:`~werkzeug.datastructures.FileStorage.save` function that can
+        store the file on the filesystem.
+
+        Note that :attr:`files` will only contain data if the request method was
+        POST, PUT or PATCH and the ``<form>`` that posted to the request had
+        ``enctype="multipart/form-data"``.  It will be empty otherwise.
+
+        See the :class:`~werkzeug.datastructures.MultiDict` /
+        :class:`~werkzeug.datastructures.FileStorage` documentation for
+        more details about the used data structure.
+        """
+        self._load_form_data()
+        return self.files
+
+    @cached_property
+    def cookies(self):
+        """A :class:`dict` with the contents of all cookies transmitted with
+        the request."""
+        return parse_cookie(
+            self.environ,
+            self.charset,
+            self.encoding_errors,
+            cls=self.dict_storage_class,
+        )
+
+    @cached_property
+    def headers(self):
+        """The headers from the WSGI environ as immutable
+        :class:`~werkzeug.datastructures.EnvironHeaders`.
+        """
+        return EnvironHeaders(self.environ)
+
+    @cached_property
+    def path(self):
+        """Requested path as unicode.  This works a bit like the regular path
+        info in the WSGI environment but will always include a leading slash,
+        even if the URL root is accessed.
+        """
+        raw_path = wsgi_decoding_dance(
+            self.environ.get("PATH_INFO") or "", self.charset, self.encoding_errors
+        )
+        return "/" + raw_path.lstrip("/")
+
+    @cached_property
+    def full_path(self):
+        """Requested path as unicode, including the query string."""
+        return self.path + u"?" + to_unicode(self.query_string, self.url_charset)
+
+    @cached_property
+    def script_root(self):
+        """The root path of the script without the trailing slash."""
+        raw_path = wsgi_decoding_dance(
+            self.environ.get("SCRIPT_NAME") or "", self.charset, self.encoding_errors
+        )
+        return raw_path.rstrip("/")
+
+    @cached_property
+    def url(self):
+        """The reconstructed current URL as IRI.
+        See also: :attr:`trusted_hosts`.
+        """
+        return get_current_url(self.environ, trusted_hosts=self.trusted_hosts)
+
+    @cached_property
+    def base_url(self):
+        """Like :attr:`url` but without the querystring
+        See also: :attr:`trusted_hosts`.
+        """
+        return get_current_url(
+            self.environ, strip_querystring=True, trusted_hosts=self.trusted_hosts
+        )
+
+    @cached_property
+    def url_root(self):
+        """The full URL root (with hostname), this is the application
+        root as IRI.
+        See also: :attr:`trusted_hosts`.
+        """
+        return get_current_url(self.environ, True, trusted_hosts=self.trusted_hosts)
+
+    @cached_property
+    def host_url(self):
+        """Just the host with scheme as IRI.
+        See also: :attr:`trusted_hosts`.
+        """
+        return get_current_url(
+            self.environ, host_only=True, trusted_hosts=self.trusted_hosts
+        )
+
+    @cached_property
+    def host(self):
+        """Just the host including the port if available.
+        See also: :attr:`trusted_hosts`.
+        """
+        return get_host(self.environ, trusted_hosts=self.trusted_hosts)
+
+    query_string = environ_property(
+        "QUERY_STRING",
+        "",
+        read_only=True,
+        load_func=wsgi_get_bytes,
+        doc="The URL parameters as raw bytestring.",
+    )
+    method = environ_property(
+        "REQUEST_METHOD",
+        "GET",
+        read_only=True,
+        load_func=lambda x: x.upper(),
+        doc="The request method. (For example ``'GET'`` or ``'POST'``).",
+    )
+
+    @cached_property
+    def access_route(self):
+        """If a forwarded header exists this is a list of all ip addresses
+        from the client ip to the last proxy server.
+        """
+        if "HTTP_X_FORWARDED_FOR" in self.environ:
+            return self.list_storage_class(
+                parse_list_header(self.environ["HTTP_X_FORWARDED_FOR"])
+            )
+        elif "REMOTE_ADDR" in self.environ:
+            return self.list_storage_class([self.environ["REMOTE_ADDR"]])
+        return self.list_storage_class()
+
+    @property
+    def remote_addr(self):
+        """The remote address of the client."""
+        return self.environ.get("REMOTE_ADDR")
+
+    remote_user = environ_property(
+        "REMOTE_USER",
+        doc="""If the server supports user authentication, and the
+        script is protected, this attribute contains the username the
+        user has authenticated as.""",
+    )
+    scheme = environ_property(
+        "wsgi.url_scheme",
+        doc="""
+        URL scheme (http or https).
+
+        .. versionadded:: 0.7""",
+    )
+    is_secure = property(
+        lambda self: self.environ["wsgi.url_scheme"] == "https",
+        doc="`True` if the request is secure.",
+    )
+    is_multithread = environ_property(
+        "wsgi.multithread",
+        doc="""boolean that is `True` if the application is served by a
+        multithreaded WSGI server.""",
+    )
+    is_multiprocess = environ_property(
+        "wsgi.multiprocess",
+        doc="""boolean that is `True` if the application is served by a
+        WSGI server that spawns multiple processes.""",
+    )
+    is_run_once = environ_property(
+        "wsgi.run_once",
+        doc="""boolean that is `True` if the application will be
+        executed only once in a process lifetime.  This is the case for
+        CGI for example, but it's not guaranteed that the execution only
+        happens one time.""",
+    )
+
+
+def _assert_not_shallow(request):
+    if request.shallow:
+        raise RuntimeError(
+            "A shallow request tried to consume form data. If you really"
+            " want to do that, set `shallow` to False."
+        )
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/base_response.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/base_response.py
new file mode 100644
index 0000000..00b9640
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/base_response.py
@@ -0,0 +1,700 @@
+import warnings
+
+from .._compat import integer_types
+from .._compat import string_types
+from .._compat import text_type
+from .._compat import to_bytes
+from .._compat import to_native
+from ..datastructures import Headers
+from ..http import dump_cookie
+from ..http import HTTP_STATUS_CODES
+from ..http import remove_entity_headers
+from ..urls import iri_to_uri
+from ..urls import url_join
+from ..utils import get_content_type
+from ..wsgi import ClosingIterator
+from ..wsgi import get_current_url
+
+
+def _run_wsgi_app(*args):
+    """This function replaces itself to ensure that the test module is not
+    imported unless required.  DO NOT USE!
+    """
+    global _run_wsgi_app
+    from ..test import run_wsgi_app as _run_wsgi_app
+
+    return _run_wsgi_app(*args)
+
+
+def _warn_if_string(iterable):
+    """Helper for the response objects to check if the iterable returned
+    to the WSGI server is not a string.
+    """
+    if isinstance(iterable, string_types):
+        warnings.warn(
+            "Response iterable was set to a string. This will appear to"
+            " work but means that the server will send the data to the"
+            " client one character at a time. This is almost never"
+            " intended behavior, use 'response.data' to assign strings"
+            " to the response object.",
+            stacklevel=2,
+        )
+
+
+def _iter_encoded(iterable, charset):
+    for item in iterable:
+        if isinstance(item, text_type):
+            yield item.encode(charset)
+        else:
+            yield item
+
+
+def _clean_accept_ranges(accept_ranges):
+    if accept_ranges is True:
+        return "bytes"
+    elif accept_ranges is False:
+        return "none"
+    elif isinstance(accept_ranges, text_type):
+        return to_native(accept_ranges)
+    raise ValueError("Invalid accept_ranges value")
+
+
+class BaseResponse(object):
+    """Base response class.  The most important fact about a response object
+    is that it's a regular WSGI application.  It's initialized with a couple
+    of response parameters (headers, body, status code etc.) and will start a
+    valid WSGI response when called with the environ and start response
+    callable.
+
+    Because it's a WSGI application itself processing usually ends before the
+    actual response is sent to the server.  This helps debugging systems
+    because they can catch all the exceptions before responses are started.
+
+    Here a small example WSGI application that takes advantage of the
+    response objects::
+
+        from werkzeug.wrappers import BaseResponse as Response
+
+        def index():
+            return Response('Index page')
+
+        def application(environ, start_response):
+            path = environ.get('PATH_INFO') or '/'
+            if path == '/':
+                response = index()
+            else:
+                response = Response('Not Found', status=404)
+            return response(environ, start_response)
+
+    Like :class:`BaseRequest` which object is lacking a lot of functionality
+    implemented in mixins.  This gives you a better control about the actual
+    API of your response objects, so you can create subclasses and add custom
+    functionality.  A full featured response object is available as
+    :class:`Response` which implements a couple of useful mixins.
+
+    To enforce a new type of already existing responses you can use the
+    :meth:`force_type` method.  This is useful if you're working with different
+    subclasses of response objects and you want to post process them with a
+    known interface.
+
+    Per default the response object will assume all the text data is `utf-8`
+    encoded.  Please refer to :doc:`the unicode chapter </unicode>` for more
+    details about customizing the behavior.
+
+    Response can be any kind of iterable or string.  If it's a string it's
+    considered being an iterable with one item which is the string passed.
+    Headers can be a list of tuples or a
+    :class:`~werkzeug.datastructures.Headers` object.
+
+    Special note for `mimetype` and `content_type`:  For most mime types
+    `mimetype` and `content_type` work the same, the difference affects
+    only 'text' mimetypes.  If the mimetype passed with `mimetype` is a
+    mimetype starting with `text/`, the charset parameter of the response
+    object is appended to it.  In contrast the `content_type` parameter is
+    always added as header unmodified.
+
+    .. versionchanged:: 0.5
+       the `direct_passthrough` parameter was added.
+
+    :param response: a string or response iterable.
+    :param status: a string with a status or an integer with the status code.
+    :param headers: a list of headers or a
+                    :class:`~werkzeug.datastructures.Headers` object.
+    :param mimetype: the mimetype for the response.  See notice above.
+    :param content_type: the content type for the response.  See notice above.
+    :param direct_passthrough: if set to `True` :meth:`iter_encoded` is not
+                               called before iteration which makes it
+                               possible to pass special iterators through
+                               unchanged (see :func:`wrap_file` for more
+                               details.)
+    """
+
+    #: the charset of the response.
+    charset = "utf-8"
+
+    #: the default status if none is provided.
+    default_status = 200
+
+    #: the default mimetype if none is provided.
+    default_mimetype = "text/plain"
+
+    #: if set to `False` accessing properties on the response object will
+    #: not try to consume the response iterator and convert it into a list.
+    #:
+    #: .. versionadded:: 0.6.2
+    #:
+    #:    That attribute was previously called `implicit_seqence_conversion`.
+    #:    (Notice the typo).  If you did use this feature, you have to adapt
+    #:    your code to the name change.
+    implicit_sequence_conversion = True
+
+    #: Should this response object correct the location header to be RFC
+    #: conformant?  This is true by default.
+    #:
+    #: .. versionadded:: 0.8
+    autocorrect_location_header = True
+
+    #: Should this response object automatically set the content-length
+    #: header if possible?  This is true by default.
+    #:
+    #: .. versionadded:: 0.8
+    automatically_set_content_length = True
+
+    #: Warn if a cookie header exceeds this size. The default, 4093, should be
+    #: safely `supported by most browsers <cookie_>`_. A cookie larger than
+    #: this size will still be sent, but it may be ignored or handled
+    #: incorrectly by some browsers. Set to 0 to disable this check.
+    #:
+    #: .. versionadded:: 0.13
+    #:
+    #: .. _`cookie`: http://browsercookielimits.squawky.net/
+    max_cookie_size = 4093
+
+    def __init__(
+        self,
+        response=None,
+        status=None,
+        headers=None,
+        mimetype=None,
+        content_type=None,
+        direct_passthrough=False,
+    ):
+        if isinstance(headers, Headers):
+            self.headers = headers
+        elif not headers:
+            self.headers = Headers()
+        else:
+            self.headers = Headers(headers)
+
+        if content_type is None:
+            if mimetype is None and "content-type" not in self.headers:
+                mimetype = self.default_mimetype
+            if mimetype is not None:
+                mimetype = get_content_type(mimetype, self.charset)
+            content_type = mimetype
+        if content_type is not None:
+            self.headers["Content-Type"] = content_type
+        if status is None:
+            status = self.default_status
+        if isinstance(status, integer_types):
+            self.status_code = status
+        else:
+            self.status = status
+
+        self.direct_passthrough = direct_passthrough
+        self._on_close = []
+
+        # we set the response after the headers so that if a class changes
+        # the charset attribute, the data is set in the correct charset.
+        if response is None:
+            self.response = []
+        elif isinstance(response, (text_type, bytes, bytearray)):
+            self.set_data(response)
+        else:
+            self.response = response
+
+    def call_on_close(self, func):
+        """Adds a function to the internal list of functions that should
+        be called as part of closing down the response.  Since 0.7 this
+        function also returns the function that was passed so that this
+        can be used as a decorator.
+
+        .. versionadded:: 0.6
+        """
+        self._on_close.append(func)
+        return func
+
+    def __repr__(self):
+        if self.is_sequence:
+            body_info = "%d bytes" % sum(map(len, self.iter_encoded()))
+        else:
+            body_info = "streamed" if self.is_streamed else "likely-streamed"
+        return "<%s %s [%s]>" % (self.__class__.__name__, body_info, self.status)
+
+    @classmethod
+    def force_type(cls, response, environ=None):
+        """Enforce that the WSGI response is a response object of the current
+        type.  Werkzeug will use the :class:`BaseResponse` internally in many
+        situations like the exceptions.  If you call :meth:`get_response` on an
+        exception you will get back a regular :class:`BaseResponse` object, even
+        if you are using a custom subclass.
+
+        This method can enforce a given response type, and it will also
+        convert arbitrary WSGI callables into response objects if an environ
+        is provided::
+
+            # convert a Werkzeug response object into an instance of the
+            # MyResponseClass subclass.
+            response = MyResponseClass.force_type(response)
+
+            # convert any WSGI application into a response object
+            response = MyResponseClass.force_type(response, environ)
+
+        This is especially useful if you want to post-process responses in
+        the main dispatcher and use functionality provided by your subclass.
+
+        Keep in mind that this will modify response objects in place if
+        possible!
+
+        :param response: a response object or wsgi application.
+        :param environ: a WSGI environment object.
+        :return: a response object.
+        """
+        if not isinstance(response, BaseResponse):
+            if environ is None:
+                raise TypeError(
+                    "cannot convert WSGI application into response"
+                    " objects without an environ"
+                )
+            response = BaseResponse(*_run_wsgi_app(response, environ))
+        response.__class__ = cls
+        return response
+
+    @classmethod
+    def from_app(cls, app, environ, buffered=False):
+        """Create a new response object from an application output.  This
+        works best if you pass it an application that returns a generator all
+        the time.  Sometimes applications may use the `write()` callable
+        returned by the `start_response` function.  This tries to resolve such
+        edge cases automatically.  But if you don't get the expected output
+        you should set `buffered` to `True` which enforces buffering.
+
+        :param app: the WSGI application to execute.
+        :param environ: the WSGI environment to execute against.
+        :param buffered: set to `True` to enforce buffering.
+        :return: a response object.
+        """
+        return cls(*_run_wsgi_app(app, environ, buffered))
+
+    @property
+    def status_code(self):
+        """The HTTP status code as a number."""
+        return self._status_code
+
+    @status_code.setter
+    def status_code(self, code):
+        self._status_code = code
+        try:
+            self._status = "%d %s" % (code, HTTP_STATUS_CODES[code].upper())
+        except KeyError:
+            self._status = "%d UNKNOWN" % code
+
+    @property
+    def status(self):
+        """The HTTP status code as a string."""
+        return self._status
+
+    @status.setter
+    def status(self, value):
+        try:
+            self._status = to_native(value)
+        except AttributeError:
+            raise TypeError("Invalid status argument")
+
+        try:
+            self._status_code = int(self._status.split(None, 1)[0])
+        except ValueError:
+            self._status_code = 0
+            self._status = "0 %s" % self._status
+        except IndexError:
+            raise ValueError("Empty status argument")
+
+    def get_data(self, as_text=False):
+        """The string representation of the request body.  Whenever you call
+        this property the request iterable is encoded and flattened.  This
+        can lead to unwanted behavior if you stream big data.
+
+        This behavior can be disabled by setting
+        :attr:`implicit_sequence_conversion` to `False`.
+
+        If `as_text` is set to `True` the return value will be a decoded
+        unicode string.
+
+        .. versionadded:: 0.9
+        """
+        self._ensure_sequence()
+        rv = b"".join(self.iter_encoded())
+        if as_text:
+            rv = rv.decode(self.charset)
+        return rv
+
+    def set_data(self, value):
+        """Sets a new string as response.  The value set must be either a
+        unicode or bytestring.  If a unicode string is set it's encoded
+        automatically to the charset of the response (utf-8 by default).
+
+        .. versionadded:: 0.9
+        """
+        # if an unicode string is set, it's encoded directly so that we
+        # can set the content length
+        if isinstance(value, text_type):
+            value = value.encode(self.charset)
+        else:
+            value = bytes(value)
+        self.response = [value]
+        if self.automatically_set_content_length:
+            self.headers["Content-Length"] = str(len(value))
+
+    data = property(
+        get_data,
+        set_data,
+        doc="A descriptor that calls :meth:`get_data` and :meth:`set_data`.",
+    )
+
+    def calculate_content_length(self):
+        """Returns the content length if available or `None` otherwise."""
+        try:
+            self._ensure_sequence()
+        except RuntimeError:
+            return None
+        return sum(len(x) for x in self.iter_encoded())
+
+    def _ensure_sequence(self, mutable=False):
+        """This method can be called by methods that need a sequence.  If
+        `mutable` is true, it will also ensure that the response sequence
+        is a standard Python list.
+
+        .. versionadded:: 0.6
+        """
+        if self.is_sequence:
+            # if we need a mutable object, we ensure it's a list.
+            if mutable and not isinstance(self.response, list):
+                self.response = list(self.response)
+            return
+        if self.direct_passthrough:
+            raise RuntimeError(
+                "Attempted implicit sequence conversion but the"
+                " response object is in direct passthrough mode."
+            )
+        if not self.implicit_sequence_conversion:
+            raise RuntimeError(
+                "The response object required the iterable to be a"
+                " sequence, but the implicit conversion was disabled."
+                " Call make_sequence() yourself."
+            )
+        self.make_sequence()
+
+    def make_sequence(self):
+        """Converts the response iterator in a list.  By default this happens
+        automatically if required.  If `implicit_sequence_conversion` is
+        disabled, this method is not automatically called and some properties
+        might raise exceptions.  This also encodes all the items.
+
+        .. versionadded:: 0.6
+        """
+        if not self.is_sequence:
+            # if we consume an iterable we have to ensure that the close
+            # method of the iterable is called if available when we tear
+            # down the response
+            close = getattr(self.response, "close", None)
+            self.response = list(self.iter_encoded())
+            if close is not None:
+                self.call_on_close(close)
+
+    def iter_encoded(self):
+        """Iter the response encoded with the encoding of the response.
+        If the response object is invoked as WSGI application the return
+        value of this method is used as application iterator unless
+        :attr:`direct_passthrough` was activated.
+        """
+        if __debug__:
+            _warn_if_string(self.response)
+        # Encode in a separate function so that self.response is fetched
+        # early.  This allows us to wrap the response with the return
+        # value from get_app_iter or iter_encoded.
+        return _iter_encoded(self.response, self.charset)
+
+    def set_cookie(
+        self,
+        key,
+        value="",
+        max_age=None,
+        expires=None,
+        path="/",
+        domain=None,
+        secure=False,
+        httponly=False,
+        samesite=None,
+    ):
+        """Sets a cookie. The parameters are the same as in the cookie `Morsel`
+        object in the Python standard library but it accepts unicode data, too.
+
+        A warning is raised if the size of the cookie header exceeds
+        :attr:`max_cookie_size`, but the header will still be set.
+
+        :param key: the key (name) of the cookie to be set.
+        :param value: the value of the cookie.
+        :param max_age: should be a number of seconds, or `None` (default) if
+                        the cookie should last only as long as the client's
+                        browser session.
+        :param expires: should be a `datetime` object or UNIX timestamp.
+        :param path: limits the cookie to a given path, per default it will
+                     span the whole domain.
+        :param domain: if you want to set a cross-domain cookie.  For example,
+                       ``domain=".example.com"`` will set a cookie that is
+                       readable by the domain ``www.example.com``,
+                       ``foo.example.com`` etc.  Otherwise, a cookie will only
+                       be readable by the domain that set it.
+        :param secure: If `True`, the cookie will only be available via HTTPS
+        :param httponly: disallow JavaScript to access the cookie.  This is an
+                         extension to the cookie standard and probably not
+                         supported by all browsers.
+        :param samesite: Limits the scope of the cookie such that it will only
+                         be attached to requests if those requests are
+                         "same-site".
+        """
+        self.headers.add(
+            "Set-Cookie",
+            dump_cookie(
+                key,
+                value=value,
+                max_age=max_age,
+                expires=expires,
+                path=path,
+                domain=domain,
+                secure=secure,
+                httponly=httponly,
+                charset=self.charset,
+                max_size=self.max_cookie_size,
+                samesite=samesite,
+            ),
+        )
+
+    def delete_cookie(self, key, path="/", domain=None):
+        """Delete a cookie.  Fails silently if key doesn't exist.
+
+        :param key: the key (name) of the cookie to be deleted.
+        :param path: if the cookie that should be deleted was limited to a
+                     path, the path has to be defined here.
+        :param domain: if the cookie that should be deleted was limited to a
+                       domain, that domain has to be defined here.
+        """
+        self.set_cookie(key, expires=0, max_age=0, path=path, domain=domain)
+
+    @property
+    def is_streamed(self):
+        """If the response is streamed (the response is not an iterable with
+        a length information) this property is `True`.  In this case streamed
+        means that there is no information about the number of iterations.
+        This is usually `True` if a generator is passed to the response object.
+
+        This is useful for checking before applying some sort of post
+        filtering that should not take place for streamed responses.
+        """
+        try:
+            len(self.response)
+        except (TypeError, AttributeError):
+            return True
+        return False
+
+    @property
+    def is_sequence(self):
+        """If the iterator is buffered, this property will be `True`.  A
+        response object will consider an iterator to be buffered if the
+        response attribute is a list or tuple.
+
+        .. versionadded:: 0.6
+        """
+        return isinstance(self.response, (tuple, list))
+
+    def close(self):
+        """Close the wrapped response if possible.  You can also use the object
+        in a with statement which will automatically close it.
+
+        .. versionadded:: 0.9
+           Can now be used in a with statement.
+        """
+        if hasattr(self.response, "close"):
+            self.response.close()
+        for func in self._on_close:
+            func()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):
+        self.close()
+
+    def freeze(self):
+        """Call this method if you want to make your response object ready for
+        being pickled.  This buffers the generator if there is one.  It will
+        also set the `Content-Length` header to the length of the body.
+
+        .. versionchanged:: 0.6
+           The `Content-Length` header is now set.
+        """
+        # we explicitly set the length to a list of the *encoded* response
+        # iterator.  Even if the implicit sequence conversion is disabled.
+        self.response = list(self.iter_encoded())
+        self.headers["Content-Length"] = str(sum(map(len, self.response)))
+
+    def get_wsgi_headers(self, environ):
+        """This is automatically called right before the response is started
+        and returns headers modified for the given environment.  It returns a
+        copy of the headers from the response with some modifications applied
+        if necessary.
+
+        For example the location header (if present) is joined with the root
+        URL of the environment.  Also the content length is automatically set
+        to zero here for certain status codes.
+
+        .. versionchanged:: 0.6
+           Previously that function was called `fix_headers` and modified
+           the response object in place.  Also since 0.6, IRIs in location
+           and content-location headers are handled properly.
+
+           Also starting with 0.6, Werkzeug will attempt to set the content
+           length if it is able to figure it out on its own.  This is the
+           case if all the strings in the response iterable are already
+           encoded and the iterable is buffered.
+
+        :param environ: the WSGI environment of the request.
+        :return: returns a new :class:`~werkzeug.datastructures.Headers`
+                 object.
+        """
+        headers = Headers(self.headers)
+        location = None
+        content_location = None
+        content_length = None
+        status = self.status_code
+
+        # iterate over the headers to find all values in one go.  Because
+        # get_wsgi_headers is used each response that gives us a tiny
+        # speedup.
+        for key, value in headers:
+            ikey = key.lower()
+            if ikey == u"location":
+                location = value
+            elif ikey == u"content-location":
+                content_location = value
+            elif ikey == u"content-length":
+                content_length = value
+
+        # make sure the location header is an absolute URL
+        if location is not None:
+            old_location = location
+            if isinstance(location, text_type):
+                # Safe conversion is necessary here as we might redirect
+                # to a broken URI scheme (for instance itms-services).
+                location = iri_to_uri(location, safe_conversion=True)
+
+            if self.autocorrect_location_header:
+                current_url = get_current_url(environ, strip_querystring=True)
+                if isinstance(current_url, text_type):
+                    current_url = iri_to_uri(current_url)
+                location = url_join(current_url, location)
+            if location != old_location:
+                headers["Location"] = location
+
+        # make sure the content location is a URL
+        if content_location is not None and isinstance(content_location, text_type):
+            headers["Content-Location"] = iri_to_uri(content_location)
+
+        if 100 <= status < 200 or status == 204:
+            # Per section 3.3.2 of RFC 7230, "a server MUST NOT send a
+            # Content-Length header field in any response with a status
+            # code of 1xx (Informational) or 204 (No Content)."
+            headers.remove("Content-Length")
+        elif status == 304:
+            remove_entity_headers(headers)
+
+        # if we can determine the content length automatically, we
+        # should try to do that.  But only if this does not involve
+        # flattening the iterator or encoding of unicode strings in
+        # the response.  We however should not do that if we have a 304
+        # response.
+        if (
+            self.automatically_set_content_length
+            and self.is_sequence
+            and content_length is None
+            and status not in (204, 304)
+            and not (100 <= status < 200)
+        ):
+            try:
+                content_length = sum(len(to_bytes(x, "ascii")) for x in self.response)
+            except UnicodeError:
+                # aha, something non-bytestringy in there, too bad, we
+                # can't safely figure out the length of the response.
+                pass
+            else:
+                headers["Content-Length"] = str(content_length)
+
+        return headers
+
+    def get_app_iter(self, environ):
+        """Returns the application iterator for the given environ.  Depending
+        on the request method and the current status code the return value
+        might be an empty response rather than the one from the response.
+
+        If the request method is `HEAD` or the status code is in a range
+        where the HTTP specification requires an empty response, an empty
+        iterable is returned.
+
+        .. versionadded:: 0.6
+
+        :param environ: the WSGI environment of the request.
+        :return: a response iterable.
+        """
+        status = self.status_code
+        if (
+            environ["REQUEST_METHOD"] == "HEAD"
+            or 100 <= status < 200
+            or status in (204, 304)
+        ):
+            iterable = ()
+        elif self.direct_passthrough:
+            if __debug__:
+                _warn_if_string(self.response)
+            return self.response
+        else:
+            iterable = self.iter_encoded()
+        return ClosingIterator(iterable, self.close)
+
+    def get_wsgi_response(self, environ):
+        """Returns the final WSGI response as tuple.  The first item in
+        the tuple is the application iterator, the second the status and
+        the third the list of headers.  The response returned is created
+        specially for the given environment.  For example if the request
+        method in the WSGI environment is ``'HEAD'`` the response will
+        be empty and only the headers and status code will be present.
+
+        .. versionadded:: 0.6
+
+        :param environ: the WSGI environment of the request.
+        :return: an ``(app_iter, status, headers)`` tuple.
+        """
+        headers = self.get_wsgi_headers(environ)
+        app_iter = self.get_app_iter(environ)
+        return app_iter, self.status, headers.to_wsgi_list()
+
+    def __call__(self, environ, start_response):
+        """Process this response as WSGI application.
+
+        :param environ: the WSGI environment.
+        :param start_response: the response callable provided by the WSGI
+                               server.
+        :return: an application iterator
+        """
+        app_iter, status, headers = self.get_wsgi_response(environ)
+        start_response(status, headers)
+        return app_iter
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/common_descriptors.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/common_descriptors.py
new file mode 100644
index 0000000..f169959
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/common_descriptors.py
@@ -0,0 +1,341 @@
+from datetime import datetime
+from datetime import timedelta
+
+from .._compat import string_types
+from ..datastructures import CallbackDict
+from ..http import dump_age
+from ..http import dump_csp_header
+from ..http import dump_header
+from ..http import dump_options_header
+from ..http import http_date
+from ..http import parse_age
+from ..http import parse_csp_header
+from ..http import parse_date
+from ..http import parse_options_header
+from ..http import parse_set_header
+from ..utils import cached_property
+from ..utils import environ_property
+from ..utils import get_content_type
+from ..utils import header_property
+from ..wsgi import get_content_length
+
+
+class CommonRequestDescriptorsMixin(object):
+    """A mixin for :class:`BaseRequest` subclasses.  Request objects that
+    mix this class in will automatically get descriptors for a couple of
+    HTTP headers with automatic type conversion.
+
+    .. versionadded:: 0.5
+    """
+
+    content_type = environ_property(
+        "CONTENT_TYPE",
+        doc="""The Content-Type entity-header field indicates the media
+        type of the entity-body sent to the recipient or, in the case of
+        the HEAD method, the media type that would have been sent had
+        the request been a GET.""",
+    )
+
+    @cached_property
+    def content_length(self):
+        """The Content-Length entity-header field indicates the size of the
+        entity-body in bytes or, in the case of the HEAD method, the size of
+        the entity-body that would have been sent had the request been a
+        GET.
+        """
+        return get_content_length(self.environ)
+
+    content_encoding = environ_property(
+        "HTTP_CONTENT_ENCODING",
+        doc="""The Content-Encoding entity-header field is used as a
+        modifier to the media-type. When present, its value indicates
+        what additional content codings have been applied to the
+        entity-body, and thus what decoding mechanisms must be applied
+        in order to obtain the media-type referenced by the Content-Type
+        header field.
+
+        .. versionadded:: 0.9""",
+    )
+    content_md5 = environ_property(
+        "HTTP_CONTENT_MD5",
+        doc="""The Content-MD5 entity-header field, as defined in
+        RFC 1864, is an MD5 digest of the entity-body for the purpose of
+        providing an end-to-end message integrity check (MIC) of the
+        entity-body. (Note: a MIC is good for detecting accidental
+        modification of the entity-body in transit, but is not proof
+        against malicious attacks.)
+
+        .. versionadded:: 0.9""",
+    )
+    referrer = environ_property(
+        "HTTP_REFERER",
+        doc="""The Referer[sic] request-header field allows the client
+        to specify, for the server's benefit, the address (URI) of the
+        resource from which the Request-URI was obtained (the
+        "referrer", although the header field is misspelled).""",
+    )
+    date = environ_property(
+        "HTTP_DATE",
+        None,
+        parse_date,
+        doc="""The Date general-header field represents the date and
+        time at which the message was originated, having the same
+        semantics as orig-date in RFC 822.""",
+    )
+    max_forwards = environ_property(
+        "HTTP_MAX_FORWARDS",
+        None,
+        int,
+        doc="""The Max-Forwards request-header field provides a
+        mechanism with the TRACE and OPTIONS methods to limit the number
+        of proxies or gateways that can forward the request to the next
+        inbound server.""",
+    )
+
+    def _parse_content_type(self):
+        if not hasattr(self, "_parsed_content_type"):
+            self._parsed_content_type = parse_options_header(
+                self.environ.get("CONTENT_TYPE", "")
+            )
+
+    @property
+    def mimetype(self):
+        """Like :attr:`content_type`, but without parameters (eg, without
+        charset, type etc.) and always lowercase.  For example if the content
+        type is ``text/HTML; charset=utf-8`` the mimetype would be
+        ``'text/html'``.
+        """
+        self._parse_content_type()
+        return self._parsed_content_type[0].lower()
+
+    @property
+    def mimetype_params(self):
+        """The mimetype parameters as dict.  For example if the content
+        type is ``text/html; charset=utf-8`` the params would be
+        ``{'charset': 'utf-8'}``.
+        """
+        self._parse_content_type()
+        return self._parsed_content_type[1]
+
+    @cached_property
+    def pragma(self):
+        """The Pragma general-header field is used to include
+        implementation-specific directives that might apply to any recipient
+        along the request/response chain.  All pragma directives specify
+        optional behavior from the viewpoint of the protocol; however, some
+        systems MAY require that behavior be consistent with the directives.
+        """
+        return parse_set_header(self.environ.get("HTTP_PRAGMA", ""))
+
+
+class CommonResponseDescriptorsMixin(object):
+    """A mixin for :class:`BaseResponse` subclasses.  Response objects that
+    mix this class in will automatically get descriptors for a couple of
+    HTTP headers with automatic type conversion.
+    """
+
+    @property
+    def mimetype(self):
+        """The mimetype (content type without charset etc.)"""
+        ct = self.headers.get("content-type")
+        if ct:
+            return ct.split(";")[0].strip()
+
+    @mimetype.setter
+    def mimetype(self, value):
+        self.headers["Content-Type"] = get_content_type(value, self.charset)
+
+    @property
+    def mimetype_params(self):
+        """The mimetype parameters as dict. For example if the
+        content type is ``text/html; charset=utf-8`` the params would be
+        ``{'charset': 'utf-8'}``.
+
+        .. versionadded:: 0.5
+        """
+
+        def on_update(d):
+            self.headers["Content-Type"] = dump_options_header(self.mimetype, d)
+
+        d = parse_options_header(self.headers.get("content-type", ""))[1]
+        return CallbackDict(d, on_update)
+
+    location = header_property(
+        "Location",
+        doc="""The Location response-header field is used to redirect
+        the recipient to a location other than the Request-URI for
+        completion of the request or identification of a new
+        resource.""",
+    )
+    age = header_property(
+        "Age",
+        None,
+        parse_age,
+        dump_age,
+        doc="""The Age response-header field conveys the sender's
+        estimate of the amount of time since the response (or its
+        revalidation) was generated at the origin server.
+
+        Age values are non-negative decimal integers, representing time
+        in seconds.""",
+    )
+    content_type = header_property(
+        "Content-Type",
+        doc="""The Content-Type entity-header field indicates the media
+        type of the entity-body sent to the recipient or, in the case of
+        the HEAD method, the media type that would have been sent had
+        the request been a GET.""",
+    )
+    content_length = header_property(
+        "Content-Length",
+        None,
+        int,
+        str,
+        doc="""The Content-Length entity-header field indicates the size
+        of the entity-body, in decimal number of OCTETs, sent to the
+        recipient or, in the case of the HEAD method, the size of the
+        entity-body that would have been sent had the request been a
+        GET.""",
+    )
+    content_location = header_property(
+        "Content-Location",
+        doc="""The Content-Location entity-header field MAY be used to
+        supply the resource location for the entity enclosed in the
+        message when that entity is accessible from a location separate
+        from the requested resource's URI.""",
+    )
+    content_encoding = header_property(
+        "Content-Encoding",
+        doc="""The Content-Encoding entity-header field is used as a
+        modifier to the media-type. When present, its value indicates
+        what additional content codings have been applied to the
+        entity-body, and thus what decoding mechanisms must be applied
+        in order to obtain the media-type referenced by the Content-Type
+        header field.""",
+    )
+    content_md5 = header_property(
+        "Content-MD5",
+        doc="""The Content-MD5 entity-header field, as defined in
+        RFC 1864, is an MD5 digest of the entity-body for the purpose of
+        providing an end-to-end message integrity check (MIC) of the
+        entity-body. (Note: a MIC is good for detecting accidental
+        modification of the entity-body in transit, but is not proof
+        against malicious attacks.)""",
+    )
+    content_security_policy = header_property(
+        "Content-Security-Policy",
+        None,
+        parse_csp_header,
+        dump_csp_header,
+        doc="""The Content-Security-Policy header adds an additional layer of
+        security to help detect and mitigate certain types of attacks.""",
+    )
+    content_security_policy_report_only = header_property(
+        "Content-Security-Policy-Report-Only",
+        None,
+        parse_csp_header,
+        dump_csp_header,
+        doc="""The Content-Security-Policy-Report-Only header adds a csp policy
+        that is not enforced but is reported thereby helping detect
+        certain types of attacks.""",
+    )
+    date = header_property(
+        "Date",
+        None,
+        parse_date,
+        http_date,
+        doc="""The Date general-header field represents the date and
+        time at which the message was originated, having the same
+        semantics as orig-date in RFC 822.""",
+    )
+    expires = header_property(
+        "Expires",
+        None,
+        parse_date,
+        http_date,
+        doc="""The Expires entity-header field gives the date/time after
+        which the response is considered stale. A stale cache entry may
+        not normally be returned by a cache.""",
+    )
+    last_modified = header_property(
+        "Last-Modified",
+        None,
+        parse_date,
+        http_date,
+        doc="""The Last-Modified entity-header field indicates the date
+        and time at which the origin server believes the variant was
+        last modified.""",
+    )
+
+    @property
+    def retry_after(self):
+        """The Retry-After response-header field can be used with a
+        503 (Service Unavailable) response to indicate how long the
+        service is expected to be unavailable to the requesting client.
+
+        Time in seconds until expiration or date.
+        """
+        value = self.headers.get("retry-after")
+        if value is None:
+            return
+        elif value.isdigit():
+            return datetime.utcnow() + timedelta(seconds=int(value))
+        return parse_date(value)
+
+    @retry_after.setter
+    def retry_after(self, value):
+        if value is None:
+            if "retry-after" in self.headers:
+                del self.headers["retry-after"]
+            return
+        elif isinstance(value, datetime):
+            value = http_date(value)
+        else:
+            value = str(value)
+        self.headers["Retry-After"] = value
+
+    def _set_property(name, doc=None):  # noqa: B902
+        def fget(self):
+            def on_update(header_set):
+                if not header_set and name in self.headers:
+                    del self.headers[name]
+                elif header_set:
+                    self.headers[name] = header_set.to_header()
+
+            return parse_set_header(self.headers.get(name), on_update)
+
+        def fset(self, value):
+            if not value:
+                del self.headers[name]
+            elif isinstance(value, string_types):
+                self.headers[name] = value
+            else:
+                self.headers[name] = dump_header(value)
+
+        return property(fget, fset, doc=doc)
+
+    vary = _set_property(
+        "Vary",
+        doc="""The Vary field value indicates the set of request-header
+        fields that fully determines, while the response is fresh,
+        whether a cache is permitted to use the response to reply to a
+        subsequent request without revalidation.""",
+    )
+    content_language = _set_property(
+        "Content-Language",
+        doc="""The Content-Language entity-header field describes the
+        natural language(s) of the intended audience for the enclosed
+        entity. Note that this might not be equivalent to all the
+        languages used within the entity-body.""",
+    )
+    allow = _set_property(
+        "Allow",
+        doc="""The Allow entity-header field lists the set of methods
+        supported by the resource identified by the Request-URI. The
+        purpose of this field is strictly to inform the recipient of
+        valid methods associated with the resource. An Allow header
+        field MUST be present in a 405 (Method Not Allowed)
+        response.""",
+    )
+
+    del _set_property
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/cors.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/cors.py
new file mode 100644
index 0000000..502fcf1
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/cors.py
@@ -0,0 +1,100 @@
+from ..http import dump_header
+from ..http import parse_set_header
+from ..utils import environ_property
+from ..utils import header_property
+
+
+class CORSRequestMixin(object):
+    """A mixin for :class:`~werkzeug.wrappers.BaseRequest` subclasses
+    that adds descriptors for Cross Origin Resource Sharing (CORS)
+    headers.
+
+    .. versionadded:: 1.0
+    """
+
+    origin = environ_property(
+        "HTTP_ORIGIN",
+        doc=(
+            "The host that the request originated from. Set"
+            " :attr:`~CORSResponseMixin.access_control_allow_origin` on"
+            " the response to indicate which origins are allowed."
+        ),
+    )
+
+    access_control_request_headers = environ_property(
+        "HTTP_ACCESS_CONTROL_REQUEST_HEADERS",
+        load_func=parse_set_header,
+        doc=(
+            "Sent with a preflight request to indicate which headers"
+            " will be sent with the cross origin request. Set"
+            " :attr:`~CORSResponseMixin.access_control_allow_headers`"
+            " on the response to indicate which headers are allowed."
+        ),
+    )
+
+    access_control_request_method = environ_property(
+        "HTTP_ACCESS_CONTROL_REQUEST_METHOD",
+        doc=(
+            "Sent with a preflight request to indicate which method"
+            " will be used for the cross origin request. Set"
+            " :attr:`~CORSResponseMixin.access_control_allow_methods`"
+            " on the response to indicate which methods are allowed."
+        ),
+    )
+
+
+class CORSResponseMixin(object):
+    """A mixin for :class:`~werkzeug.wrappers.BaseResponse` subclasses
+    that adds descriptors for Cross Origin Resource Sharing (CORS)
+    headers.
+
+    .. versionadded:: 1.0
+    """
+
+    @property
+    def access_control_allow_credentials(self):
+        """Whether credentials can be shared by the browser to
+        JavaScript code. As part of the preflight request it indicates
+        whether credentials can be used on the cross origin request.
+        """
+        return "Access-Control-Allow-Credentials" in self.headers
+
+    @access_control_allow_credentials.setter
+    def access_control_allow_credentials(self, value):
+        if value is True:
+            self.headers["Access-Control-Allow-Credentials"] = "true"
+        else:
+            self.headers.pop("Access-Control-Allow-Credentials", None)
+
+    access_control_allow_headers = header_property(
+        "Access-Control-Allow-Headers",
+        load_func=parse_set_header,
+        dump_func=dump_header,
+        doc="Which headers can be sent with the cross origin request.",
+    )
+
+    access_control_allow_methods = header_property(
+        "Access-Control-Allow-Methods",
+        load_func=parse_set_header,
+        dump_func=dump_header,
+        doc="Which methods can be used for the cross origin request.",
+    )
+
+    access_control_allow_origin = header_property(
+        "Access-Control-Allow-Origin",
+        doc="The origin or '*' for any origin that may make cross origin requests.",
+    )
+
+    access_control_expose_headers = header_property(
+        "Access-Control-Expose-Headers",
+        load_func=parse_set_header,
+        dump_func=dump_header,
+        doc="Which headers can be shared by the browser to JavaScript code.",
+    )
+
+    access_control_max_age = header_property(
+        "Access-Control-Max-Age",
+        load_func=int,
+        dump_func=str,
+        doc="The maximum age in seconds the access control settings can be cached for.",
+    )
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/etag.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/etag.py
new file mode 100644
index 0000000..460629b
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/etag.py
@@ -0,0 +1,304 @@
+from .._compat import string_types
+from .._internal import _get_environ
+from ..datastructures import ContentRange
+from ..datastructures import RequestCacheControl
+from ..datastructures import ResponseCacheControl
+from ..http import generate_etag
+from ..http import http_date
+from ..http import is_resource_modified
+from ..http import parse_cache_control_header
+from ..http import parse_content_range_header
+from ..http import parse_date
+from ..http import parse_etags
+from ..http import parse_if_range_header
+from ..http import parse_range_header
+from ..http import quote_etag
+from ..http import unquote_etag
+from ..utils import cached_property
+from ..utils import header_property
+from ..wrappers.base_response import _clean_accept_ranges
+from ..wsgi import _RangeWrapper
+
+
+class ETagRequestMixin(object):
+    """Add entity tag and cache descriptors to a request object or object with
+    a WSGI environment available as :attr:`~BaseRequest.environ`.  This not
+    only provides access to etags but also to the cache control header.
+    """
+
+    @cached_property
+    def cache_control(self):
+        """A :class:`~werkzeug.datastructures.RequestCacheControl` object
+        for the incoming cache control headers.
+        """
+        cache_control = self.environ.get("HTTP_CACHE_CONTROL")
+        return parse_cache_control_header(cache_control, None, RequestCacheControl)
+
+    @cached_property
+    def if_match(self):
+        """An object containing all the etags in the `If-Match` header.
+
+        :rtype: :class:`~werkzeug.datastructures.ETags`
+        """
+        return parse_etags(self.environ.get("HTTP_IF_MATCH"))
+
+    @cached_property
+    def if_none_match(self):
+        """An object containing all the etags in the `If-None-Match` header.
+
+        :rtype: :class:`~werkzeug.datastructures.ETags`
+        """
+        return parse_etags(self.environ.get("HTTP_IF_NONE_MATCH"))
+
+    @cached_property
+    def if_modified_since(self):
+        """The parsed `If-Modified-Since` header as datetime object."""
+        return parse_date(self.environ.get("HTTP_IF_MODIFIED_SINCE"))
+
+    @cached_property
+    def if_unmodified_since(self):
+        """The parsed `If-Unmodified-Since` header as datetime object."""
+        return parse_date(self.environ.get("HTTP_IF_UNMODIFIED_SINCE"))
+
+    @cached_property
+    def if_range(self):
+        """The parsed `If-Range` header.
+
+        .. versionadded:: 0.7
+
+        :rtype: :class:`~werkzeug.datastructures.IfRange`
+        """
+        return parse_if_range_header(self.environ.get("HTTP_IF_RANGE"))
+
+    @cached_property
+    def range(self):
+        """The parsed `Range` header.
+
+        .. versionadded:: 0.7
+
+        :rtype: :class:`~werkzeug.datastructures.Range`
+        """
+        return parse_range_header(self.environ.get("HTTP_RANGE"))
+
+
+class ETagResponseMixin(object):
+    """Adds extra functionality to a response object for etag and cache
+    handling.  This mixin requires an object with at least a `headers`
+    object that implements a dict like interface similar to
+    :class:`~werkzeug.datastructures.Headers`.
+
+    If you want the :meth:`freeze` method to automatically add an etag, you
+    have to mixin this method before the response base class.  The default
+    response class does not do that.
+    """
+
+    @property
+    def cache_control(self):
+        """The Cache-Control general-header field is used to specify
+        directives that MUST be obeyed by all caching mechanisms along the
+        request/response chain.
+        """
+
+        def on_update(cache_control):
+            if not cache_control and "cache-control" in self.headers:
+                del self.headers["cache-control"]
+            elif cache_control:
+                self.headers["Cache-Control"] = cache_control.to_header()
+
+        return parse_cache_control_header(
+            self.headers.get("cache-control"), on_update, ResponseCacheControl
+        )
+
+    def _wrap_response(self, start, length):
+        """Wrap existing Response in case of Range Request context."""
+        if self.status_code == 206:
+            self.response = _RangeWrapper(self.response, start, length)
+
+    def _is_range_request_processable(self, environ):
+        """Return ``True`` if `Range` header is present and if underlying
+        resource is considered unchanged when compared with `If-Range` header.
+        """
+        return (
+            "HTTP_IF_RANGE" not in environ
+            or not is_resource_modified(
+                environ,
+                self.headers.get("etag"),
+                None,
+                self.headers.get("last-modified"),
+                ignore_if_range=False,
+            )
+        ) and "HTTP_RANGE" in environ
+
+    def _process_range_request(self, environ, complete_length=None, accept_ranges=None):
+        """Handle Range Request related headers (RFC7233).  If `Accept-Ranges`
+        header is valid, and Range Request is processable, we set the headers
+        as described by the RFC, and wrap the underlying response in a
+        RangeWrapper.
+
+        Returns ``True`` if Range Request can be fulfilled, ``False`` otherwise.
+
+        :raises: :class:`~werkzeug.exceptions.RequestedRangeNotSatisfiable`
+                 if `Range` header could not be parsed or satisfied.
+        """
+        from ..exceptions import RequestedRangeNotSatisfiable
+
+        if (
+            accept_ranges is None
+            or complete_length is None
+            or not self._is_range_request_processable(environ)
+        ):
+            return False
+
+        parsed_range = parse_range_header(environ.get("HTTP_RANGE"))
+
+        if parsed_range is None:
+            raise RequestedRangeNotSatisfiable(complete_length)
+
+        range_tuple = parsed_range.range_for_length(complete_length)
+        content_range_header = parsed_range.to_content_range_header(complete_length)
+
+        if range_tuple is None or content_range_header is None:
+            raise RequestedRangeNotSatisfiable(complete_length)
+
+        content_length = range_tuple[1] - range_tuple[0]
+        self.headers["Content-Length"] = content_length
+        self.headers["Accept-Ranges"] = accept_ranges
+        self.content_range = content_range_header
+        self.status_code = 206
+        self._wrap_response(range_tuple[0], content_length)
+        return True
+
+    def make_conditional(
+        self, request_or_environ, accept_ranges=False, complete_length=None
+    ):
+        """Make the response conditional to the request.  This method works
+        best if an etag was defined for the response already.  The `add_etag`
+        method can be used to do that.  If called without etag just the date
+        header is set.
+
+        This does nothing if the request method in the request or environ is
+        anything but GET or HEAD.
+
+        For optimal performance when handling range requests, it's recommended
+        that your response data object implements `seekable`, `seek` and `tell`
+        methods as described by :py:class:`io.IOBase`.  Objects returned by
+        :meth:`~werkzeug.wsgi.wrap_file` automatically implement those methods.
+
+        It does not remove the body of the response because that's something
+        the :meth:`__call__` function does for us automatically.
+
+        Returns self so that you can do ``return resp.make_conditional(req)``
+        but modifies the object in-place.
+
+        :param request_or_environ: a request object or WSGI environment to be
+                                   used to make the response conditional
+                                   against.
+        :param accept_ranges: This parameter dictates the value of
+                              `Accept-Ranges` header. If ``False`` (default),
+                              the header is not set. If ``True``, it will be set
+                              to ``"bytes"``. If ``None``, it will be set to
+                              ``"none"``. If it's a string, it will use this
+                              value.
+        :param complete_length: Will be used only in valid Range Requests.
+                                It will set `Content-Range` complete length
+                                value and compute `Content-Length` real value.
+                                This parameter is mandatory for successful
+                                Range Requests completion.
+        :raises: :class:`~werkzeug.exceptions.RequestedRangeNotSatisfiable`
+                 if `Range` header could not be parsed or satisfied.
+        """
+        environ = _get_environ(request_or_environ)
+        if environ["REQUEST_METHOD"] in ("GET", "HEAD"):
+            # if the date is not in the headers, add it now.  We however
+            # will not override an already existing header.  Unfortunately
+            # this header will be overriden by many WSGI servers including
+            # wsgiref.
+            if "date" not in self.headers:
+                self.headers["Date"] = http_date()
+            accept_ranges = _clean_accept_ranges(accept_ranges)
+            is206 = self._process_range_request(environ, complete_length, accept_ranges)
+            if not is206 and not is_resource_modified(
+                environ,
+                self.headers.get("etag"),
+                None,
+                self.headers.get("last-modified"),
+            ):
+                if parse_etags(environ.get("HTTP_IF_MATCH")):
+                    self.status_code = 412
+                else:
+                    self.status_code = 304
+            if (
+                self.automatically_set_content_length
+                and "content-length" not in self.headers
+            ):
+                length = self.calculate_content_length()
+                if length is not None:
+                    self.headers["Content-Length"] = length
+        return self
+
+    def add_etag(self, overwrite=False, weak=False):
+        """Add an etag for the current response if there is none yet."""
+        if overwrite or "etag" not in self.headers:
+            self.set_etag(generate_etag(self.get_data()), weak)
+
+    def set_etag(self, etag, weak=False):
+        """Set the etag, and override the old one if there was one."""
+        self.headers["ETag"] = quote_etag(etag, weak)
+
+    def get_etag(self):
+        """Return a tuple in the form ``(etag, is_weak)``.  If there is no
+        ETag the return value is ``(None, None)``.
+        """
+        return unquote_etag(self.headers.get("ETag"))
+
+    def freeze(self, no_etag=False):
+        """Call this method if you want to make your response object ready for
+        pickeling.  This buffers the generator if there is one.  This also
+        sets the etag unless `no_etag` is set to `True`.
+        """
+        if not no_etag:
+            self.add_etag()
+        super(ETagResponseMixin, self).freeze()
+
+    accept_ranges = header_property(
+        "Accept-Ranges",
+        doc="""The `Accept-Ranges` header. Even though the name would
+        indicate that multiple values are supported, it must be one
+        string token only.
+
+        The values ``'bytes'`` and ``'none'`` are common.
+
+        .. versionadded:: 0.7""",
+    )
+
+    @property
+    def content_range(self):
+        """The ``Content-Range`` header as a
+        :class:`~werkzeug.datastructures.ContentRange` object. Available
+        even if the header is not set.
+
+        .. versionadded:: 0.7
+        """
+
+        def on_update(rng):
+            if not rng:
+                del self.headers["content-range"]
+            else:
+                self.headers["Content-Range"] = rng.to_header()
+
+        rv = parse_content_range_header(self.headers.get("content-range"), on_update)
+        # always provide a content range object to make the descriptor
+        # more user friendly.  It provides an unset() method that can be
+        # used to remove the header quickly.
+        if rv is None:
+            rv = ContentRange(None, None, None, on_update=on_update)
+        return rv
+
+    @content_range.setter
+    def content_range(self, value):
+        if not value:
+            del self.headers["content-range"]
+        elif isinstance(value, string_types):
+            self.headers["Content-Range"] = value
+        else:
+            self.headers["Content-Range"] = value.to_header()
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/json.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/json.py
new file mode 100644
index 0000000..6d5dc33
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/json.py
@@ -0,0 +1,145 @@
+from __future__ import absolute_import
+
+import datetime
+import uuid
+
+from .._compat import text_type
+from ..exceptions import BadRequest
+from ..utils import detect_utf_encoding
+
+try:
+    import simplejson as _json
+except ImportError:
+    import json as _json
+
+
+class _JSONModule(object):
+    @staticmethod
+    def _default(o):
+        if isinstance(o, datetime.date):
+            return o.isoformat()
+
+        if isinstance(o, uuid.UUID):
+            return str(o)
+
+        if hasattr(o, "__html__"):
+            return text_type(o.__html__())
+
+        raise TypeError()
+
+    @classmethod
+    def dumps(cls, obj, **kw):
+        kw.setdefault("separators", (",", ":"))
+        kw.setdefault("default", cls._default)
+        kw.setdefault("sort_keys", True)
+        return _json.dumps(obj, **kw)
+
+    @staticmethod
+    def loads(s, **kw):
+        if isinstance(s, bytes):
+            # Needed for Python < 3.6
+            encoding = detect_utf_encoding(s)
+            s = s.decode(encoding)
+
+        return _json.loads(s, **kw)
+
+
+class JSONMixin(object):
+    """Mixin to parse :attr:`data` as JSON. Can be mixed in for both
+    :class:`~werkzeug.wrappers.Request` and
+    :class:`~werkzeug.wrappers.Response` classes.
+
+    If `simplejson`_ is installed it is preferred over Python's built-in
+    :mod:`json` module.
+
+    .. _simplejson: https://simplejson.readthedocs.io/en/latest/
+    """
+
+    #: A module or other object that has ``dumps`` and ``loads``
+    #: functions that match the API of the built-in :mod:`json` module.
+    json_module = _JSONModule
+
+    @property
+    def json(self):
+        """The parsed JSON data if :attr:`mimetype` indicates JSON
+        (:mimetype:`application/json`, see :meth:`is_json`).
+
+        Calls :meth:`get_json` with default arguments.
+        """
+        return self.get_json()
+
+    @property
+    def is_json(self):
+        """Check if the mimetype indicates JSON data, either
+        :mimetype:`application/json` or :mimetype:`application/*+json`.
+        """
+        mt = self.mimetype
+        return (
+            mt == "application/json"
+            or mt.startswith("application/")
+            and mt.endswith("+json")
+        )
+
+    def _get_data_for_json(self, cache):
+        try:
+            return self.get_data(cache=cache)
+        except TypeError:
+            # Response doesn't have cache param.
+            return self.get_data()
+
+    # Cached values for ``(silent=False, silent=True)``. Initialized
+    # with sentinel values.
+    _cached_json = (Ellipsis, Ellipsis)
+
+    def get_json(self, force=False, silent=False, cache=True):
+        """Parse :attr:`data` as JSON.
+
+        If the mimetype does not indicate JSON
+        (:mimetype:`application/json`, see :meth:`is_json`), this
+        returns ``None``.
+
+        If parsing fails, :meth:`on_json_loading_failed` is called and
+        its return value is used as the return value.
+
+        :param force: Ignore the mimetype and always try to parse JSON.
+        :param silent: Silence parsing errors and return ``None``
+            instead.
+        :param cache: Store the parsed JSON to return for subsequent
+            calls.
+        """
+        if cache and self._cached_json[silent] is not Ellipsis:
+            return self._cached_json[silent]
+
+        if not (force or self.is_json):
+            return None
+
+        data = self._get_data_for_json(cache=cache)
+
+        try:
+            rv = self.json_module.loads(data)
+        except ValueError as e:
+            if silent:
+                rv = None
+
+                if cache:
+                    normal_rv, _ = self._cached_json
+                    self._cached_json = (normal_rv, rv)
+            else:
+                rv = self.on_json_loading_failed(e)
+
+                if cache:
+                    _, silent_rv = self._cached_json
+                    self._cached_json = (rv, silent_rv)
+        else:
+            if cache:
+                self._cached_json = (rv, rv)
+
+        return rv
+
+    def on_json_loading_failed(self, e):
+        """Called if :meth:`get_json` parsing fails and isn't silenced.
+        If this method returns a value, it is used as the return value
+        for :meth:`get_json`. The default implementation raises
+        :exc:`~werkzeug.exceptions.BadRequest`.
+        """
+        raise BadRequest("Failed to decode JSON object: {0}".format(e))
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/request.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/request.py
new file mode 100644
index 0000000..5c2fe10
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/request.py
@@ -0,0 +1,49 @@
+from .accept import AcceptMixin
+from .auth import AuthorizationMixin
+from .base_request import BaseRequest
+from .common_descriptors import CommonRequestDescriptorsMixin
+from .cors import CORSRequestMixin
+from .etag import ETagRequestMixin
+from .user_agent import UserAgentMixin
+
+
+class Request(
+    BaseRequest,
+    AcceptMixin,
+    ETagRequestMixin,
+    UserAgentMixin,
+    AuthorizationMixin,
+    CORSRequestMixin,
+    CommonRequestDescriptorsMixin,
+):
+    """Full featured request object implementing the following mixins:
+
+    -   :class:`AcceptMixin` for accept header parsing
+    -   :class:`ETagRequestMixin` for etag and cache control handling
+    -   :class:`UserAgentMixin` for user agent introspection
+    -   :class:`AuthorizationMixin` for http auth handling
+    -   :class:`~werkzeug.wrappers.cors.CORSRequestMixin` for Cross
+        Origin Resource Sharing headers
+    -   :class:`CommonRequestDescriptorsMixin` for common headers
+
+    """
+
+
+class StreamOnlyMixin(object):
+    """If mixed in before the request object this will change the behavior
+    of it to disable handling of form parsing.  This disables the
+    :attr:`files`, :attr:`form` attributes and will just provide a
+    :attr:`stream` attribute that however is always available.
+
+    .. versionadded:: 0.9
+    """
+
+    disable_data_descriptor = True
+    want_form_data_parsed = False
+
+
+class PlainRequest(StreamOnlyMixin, Request):
+    """A request object without special form parsing capabilities.
+
+    .. versionadded:: 0.9
+    """
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/response.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/response.py
new file mode 100644
index 0000000..8f190f7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/response.py
@@ -0,0 +1,84 @@
+from ..utils import cached_property
+from .auth import WWWAuthenticateMixin
+from .base_response import BaseResponse
+from .common_descriptors import CommonResponseDescriptorsMixin
+from .cors import CORSResponseMixin
+from .etag import ETagResponseMixin
+
+
+class ResponseStream(object):
+    """A file descriptor like object used by the :class:`ResponseStreamMixin` to
+    represent the body of the stream.  It directly pushes into the response
+    iterable of the response object.
+    """
+
+    mode = "wb+"
+
+    def __init__(self, response):
+        self.response = response
+        self.closed = False
+
+    def write(self, value):
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+        self.response._ensure_sequence(mutable=True)
+        self.response.response.append(value)
+        self.response.headers.pop("Content-Length", None)
+        return len(value)
+
+    def writelines(self, seq):
+        for item in seq:
+            self.write(item)
+
+    def close(self):
+        self.closed = True
+
+    def flush(self):
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+
+    def isatty(self):
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+        return False
+
+    def tell(self):
+        self.response._ensure_sequence()
+        return sum(map(len, self.response.response))
+
+    @property
+    def encoding(self):
+        return self.response.charset
+
+
+class ResponseStreamMixin(object):
+    """Mixin for :class:`BaseResponse` subclasses.  Classes that inherit from
+    this mixin will automatically get a :attr:`stream` property that provides
+    a write-only interface to the response iterable.
+    """
+
+    @cached_property
+    def stream(self):
+        """The response iterable as write-only stream."""
+        return ResponseStream(self)
+
+
+class Response(
+    BaseResponse,
+    ETagResponseMixin,
+    WWWAuthenticateMixin,
+    CORSResponseMixin,
+    ResponseStreamMixin,
+    CommonResponseDescriptorsMixin,
+):
+    """Full featured response object implementing the following mixins:
+
+    -   :class:`ETagResponseMixin` for etag and cache control handling
+    -   :class:`WWWAuthenticateMixin` for HTTP authentication support
+    -   :class:`~werkzeug.wrappers.cors.CORSResponseMixin` for Cross
+        Origin Resource Sharing headers
+    -   :class:`ResponseStreamMixin` to add support for the ``stream``
+        property
+    -   :class:`CommonResponseDescriptorsMixin` for various HTTP
+        descriptors
+    """
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/user_agent.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/user_agent.py
new file mode 100644
index 0000000..a32d8ac
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wrappers/user_agent.py
@@ -0,0 +1,14 @@
+from ..useragents import UserAgent
+from ..utils import cached_property
+
+
+class UserAgentMixin(object):
+    """Adds a `user_agent` attribute to the request object which
+    contains the parsed user agent of the browser that triggered the
+    request as a :class:`~werkzeug.useragents.UserAgent` object.
+    """
+
+    @cached_property
+    def user_agent(self):
+        """The current user agent."""
+        return UserAgent(self.environ)
diff --git a/python3-vckonline/lib/python3.8/site-packages/werkzeug/wsgi.py b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wsgi.py
new file mode 100644
index 0000000..aa4e713
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/werkzeug/wsgi.py
@@ -0,0 +1,1000 @@
+# -*- coding: utf-8 -*-
+"""
+    werkzeug.wsgi
+    ~~~~~~~~~~~~~
+
+    This module implements WSGI related helpers.
+
+    :copyright: 2007 Pallets
+    :license: BSD-3-Clause
+"""
+import io
+import re
+from functools import partial
+from functools import update_wrapper
+from itertools import chain
+
+from ._compat import BytesIO
+from ._compat import implements_iterator
+from ._compat import make_literal_wrapper
+from ._compat import string_types
+from ._compat import text_type
+from ._compat import to_bytes
+from ._compat import to_unicode
+from ._compat import try_coerce_native
+from ._compat import wsgi_get_bytes
+from ._internal import _encode_idna
+from .urls import uri_to_iri
+from .urls import url_join
+from .urls import url_parse
+from .urls import url_quote
+
+
+def responder(f):
+    """Marks a function as responder.  Decorate a function with it and it
+    will automatically call the return value as WSGI application.
+
+    Example::
+
+        @responder
+        def application(environ, start_response):
+            return Response('Hello World!')
+    """
+    return update_wrapper(lambda *a: f(*a)(*a[-2:]), f)
+
+
+def get_current_url(
+    environ,
+    root_only=False,
+    strip_querystring=False,
+    host_only=False,
+    trusted_hosts=None,
+):
+    """A handy helper function that recreates the full URL as IRI for the
+    current request or parts of it.  Here's an example:
+
+    >>> from werkzeug.test import create_environ
+    >>> env = create_environ("/?param=foo", "http://localhost/script")
+    >>> get_current_url(env)
+    'http://localhost/script/?param=foo'
+    >>> get_current_url(env, root_only=True)
+    'http://localhost/script/'
+    >>> get_current_url(env, host_only=True)
+    'http://localhost/'
+    >>> get_current_url(env, strip_querystring=True)
+    'http://localhost/script/'
+
+    This optionally it verifies that the host is in a list of trusted hosts.
+    If the host is not in there it will raise a
+    :exc:`~werkzeug.exceptions.SecurityError`.
+
+    Note that the string returned might contain unicode characters as the
+    representation is an IRI not an URI.  If you need an ASCII only
+    representation you can use the :func:`~werkzeug.urls.iri_to_uri`
+    function:
+
+    >>> from werkzeug.urls import iri_to_uri
+    >>> iri_to_uri(get_current_url(env))
+    'http://localhost/script/?param=foo'
+
+    :param environ: the WSGI environment to get the current URL from.
+    :param root_only: set `True` if you only want the root URL.
+    :param strip_querystring: set to `True` if you don't want the querystring.
+    :param host_only: set to `True` if the host URL should be returned.
+    :param trusted_hosts: a list of trusted hosts, see :func:`host_is_trusted`
+                          for more information.
+    """
+    tmp = [environ["wsgi.url_scheme"], "://", get_host(environ, trusted_hosts)]
+    cat = tmp.append
+    if host_only:
+        return uri_to_iri("".join(tmp) + "/")
+    cat(url_quote(wsgi_get_bytes(environ.get("SCRIPT_NAME", ""))).rstrip("/"))
+    cat("/")
+    if not root_only:
+        cat(url_quote(wsgi_get_bytes(environ.get("PATH_INFO", "")).lstrip(b"/")))
+        if not strip_querystring:
+            qs = get_query_string(environ)
+            if qs:
+                cat("?" + qs)
+    return uri_to_iri("".join(tmp))
+
+
+def host_is_trusted(hostname, trusted_list):
+    """Checks if a host is trusted against a list.  This also takes care
+    of port normalization.
+
+    .. versionadded:: 0.9
+
+    :param hostname: the hostname to check
+    :param trusted_list: a list of hostnames to check against.  If a
+                         hostname starts with a dot it will match against
+                         all subdomains as well.
+    """
+    if not hostname:
+        return False
+
+    if isinstance(trusted_list, string_types):
+        trusted_list = [trusted_list]
+
+    def _normalize(hostname):
+        if ":" in hostname:
+            hostname = hostname.rsplit(":", 1)[0]
+        return _encode_idna(hostname)
+
+    try:
+        hostname = _normalize(hostname)
+    except UnicodeError:
+        return False
+    for ref in trusted_list:
+        if ref.startswith("."):
+            ref = ref[1:]
+            suffix_match = True
+        else:
+            suffix_match = False
+        try:
+            ref = _normalize(ref)
+        except UnicodeError:
+            return False
+        if ref == hostname:
+            return True
+        if suffix_match and hostname.endswith(b"." + ref):
+            return True
+    return False
+
+
+def get_host(environ, trusted_hosts=None):
+    """Return the host for the given WSGI environment. This first checks
+    the ``Host`` header. If it's not present, then ``SERVER_NAME`` and
+    ``SERVER_PORT`` are used. The host will only contain the port if it
+    is different than the standard port for the protocol.
+
+    Optionally, verify that the host is trusted using
+    :func:`host_is_trusted` and raise a
+    :exc:`~werkzeug.exceptions.SecurityError` if it is not.
+
+    :param environ: The WSGI environment to get the host from.
+    :param trusted_hosts: A list of trusted hosts.
+    :return: Host, with port if necessary.
+    :raise ~werkzeug.exceptions.SecurityError: If the host is not
+        trusted.
+    """
+    if "HTTP_HOST" in environ:
+        rv = environ["HTTP_HOST"]
+        if environ["wsgi.url_scheme"] == "http" and rv.endswith(":80"):
+            rv = rv[:-3]
+        elif environ["wsgi.url_scheme"] == "https" and rv.endswith(":443"):
+            rv = rv[:-4]
+    else:
+        rv = environ["SERVER_NAME"]
+        if (environ["wsgi.url_scheme"], environ["SERVER_PORT"]) not in (
+            ("https", "443"),
+            ("http", "80"),
+        ):
+            rv += ":" + environ["SERVER_PORT"]
+    if trusted_hosts is not None:
+        if not host_is_trusted(rv, trusted_hosts):
+            from .exceptions import SecurityError
+
+            raise SecurityError('Host "%s" is not trusted' % rv)
+    return rv
+
+
+def get_content_length(environ):
+    """Returns the content length from the WSGI environment as
+    integer. If it's not available or chunked transfer encoding is used,
+    ``None`` is returned.
+
+    .. versionadded:: 0.9
+
+    :param environ: the WSGI environ to fetch the content length from.
+    """
+    if environ.get("HTTP_TRANSFER_ENCODING", "") == "chunked":
+        return None
+
+    content_length = environ.get("CONTENT_LENGTH")
+    if content_length is not None:
+        try:
+            return max(0, int(content_length))
+        except (ValueError, TypeError):
+            pass
+
+
+def get_input_stream(environ, safe_fallback=True):
+    """Returns the input stream from the WSGI environment and wraps it
+    in the most sensible way possible. The stream returned is not the
+    raw WSGI stream in most cases but one that is safe to read from
+    without taking into account the content length.
+
+    If content length is not set, the stream will be empty for safety reasons.
+    If the WSGI server supports chunked or infinite streams, it should set
+    the ``wsgi.input_terminated`` value in the WSGI environ to indicate that.
+
+    .. versionadded:: 0.9
+
+    :param environ: the WSGI environ to fetch the stream from.
+    :param safe_fallback: use an empty stream as a safe fallback when the
+        content length is not set. Disabling this allows infinite streams,
+        which can be a denial-of-service risk.
+    """
+    stream = environ["wsgi.input"]
+    content_length = get_content_length(environ)
+
+    # A wsgi extension that tells us if the input is terminated.  In
+    # that case we return the stream unchanged as we know we can safely
+    # read it until the end.
+    if environ.get("wsgi.input_terminated"):
+        return stream
+
+    # If the request doesn't specify a content length, returning the stream is
+    # potentially dangerous because it could be infinite, malicious or not. If
+    # safe_fallback is true, return an empty stream instead for safety.
+    if content_length is None:
+        return BytesIO() if safe_fallback else stream
+
+    # Otherwise limit the stream to the content length
+    return LimitedStream(stream, content_length)
+
+
+def get_query_string(environ):
+    """Returns the `QUERY_STRING` from the WSGI environment.  This also takes
+    care about the WSGI decoding dance on Python 3 environments as a
+    native string.  The string returned will be restricted to ASCII
+    characters.
+
+    .. versionadded:: 0.9
+
+    :param environ: the WSGI environment object to get the query string from.
+    """
+    qs = wsgi_get_bytes(environ.get("QUERY_STRING", ""))
+    # QUERY_STRING really should be ascii safe but some browsers
+    # will send us some unicode stuff (I am looking at you IE).
+    # In that case we want to urllib quote it badly.
+    return try_coerce_native(url_quote(qs, safe=":&%=+$!*'(),"))
+
+
+def get_path_info(environ, charset="utf-8", errors="replace"):
+    """Returns the `PATH_INFO` from the WSGI environment and properly
+    decodes it.  This also takes care about the WSGI decoding dance
+    on Python 3 environments.  if the `charset` is set to `None` a
+    bytestring is returned.
+
+    .. versionadded:: 0.9
+
+    :param environ: the WSGI environment object to get the path from.
+    :param charset: the charset for the path info, or `None` if no
+                    decoding should be performed.
+    :param errors: the decoding error handling.
+    """
+    path = wsgi_get_bytes(environ.get("PATH_INFO", ""))
+    return to_unicode(path, charset, errors, allow_none_charset=True)
+
+
+def get_script_name(environ, charset="utf-8", errors="replace"):
+    """Returns the `SCRIPT_NAME` from the WSGI environment and properly
+    decodes it.  This also takes care about the WSGI decoding dance
+    on Python 3 environments.  if the `charset` is set to `None` a
+    bytestring is returned.
+
+    .. versionadded:: 0.9
+
+    :param environ: the WSGI environment object to get the path from.
+    :param charset: the charset for the path, or `None` if no
+                    decoding should be performed.
+    :param errors: the decoding error handling.
+    """
+    path = wsgi_get_bytes(environ.get("SCRIPT_NAME", ""))
+    return to_unicode(path, charset, errors, allow_none_charset=True)
+
+
+def pop_path_info(environ, charset="utf-8", errors="replace"):
+    """Removes and returns the next segment of `PATH_INFO`, pushing it onto
+    `SCRIPT_NAME`.  Returns `None` if there is nothing left on `PATH_INFO`.
+
+    If the `charset` is set to `None` a bytestring is returned.
+
+    If there are empty segments (``'/foo//bar``) these are ignored but
+    properly pushed to the `SCRIPT_NAME`:
+
+    >>> env = {'SCRIPT_NAME': '/foo', 'PATH_INFO': '/a/b'}
+    >>> pop_path_info(env)
+    'a'
+    >>> env['SCRIPT_NAME']
+    '/foo/a'
+    >>> pop_path_info(env)
+    'b'
+    >>> env['SCRIPT_NAME']
+    '/foo/a/b'
+
+    .. versionadded:: 0.5
+
+    .. versionchanged:: 0.9
+       The path is now decoded and a charset and encoding
+       parameter can be provided.
+
+    :param environ: the WSGI environment that is modified.
+    """
+    path = environ.get("PATH_INFO")
+    if not path:
+        return None
+
+    script_name = environ.get("SCRIPT_NAME", "")
+
+    # shift multiple leading slashes over
+    old_path = path
+    path = path.lstrip("/")
+    if path != old_path:
+        script_name += "/" * (len(old_path) - len(path))
+
+    if "/" not in path:
+        environ["PATH_INFO"] = ""
+        environ["SCRIPT_NAME"] = script_name + path
+        rv = wsgi_get_bytes(path)
+    else:
+        segment, path = path.split("/", 1)
+        environ["PATH_INFO"] = "/" + path
+        environ["SCRIPT_NAME"] = script_name + segment
+        rv = wsgi_get_bytes(segment)
+
+    return to_unicode(rv, charset, errors, allow_none_charset=True)
+
+
+def peek_path_info(environ, charset="utf-8", errors="replace"):
+    """Returns the next segment on the `PATH_INFO` or `None` if there
+    is none.  Works like :func:`pop_path_info` without modifying the
+    environment:
+
+    >>> env = {'SCRIPT_NAME': '/foo', 'PATH_INFO': '/a/b'}
+    >>> peek_path_info(env)
+    'a'
+    >>> peek_path_info(env)
+    'a'
+
+    If the `charset` is set to `None` a bytestring is returned.
+
+    .. versionadded:: 0.5
+
+    .. versionchanged:: 0.9
+       The path is now decoded and a charset and encoding
+       parameter can be provided.
+
+    :param environ: the WSGI environment that is checked.
+    """
+    segments = environ.get("PATH_INFO", "").lstrip("/").split("/", 1)
+    if segments:
+        return to_unicode(
+            wsgi_get_bytes(segments[0]), charset, errors, allow_none_charset=True
+        )
+
+
+def extract_path_info(
+    environ_or_baseurl,
+    path_or_url,
+    charset="utf-8",
+    errors="werkzeug.url_quote",
+    collapse_http_schemes=True,
+):
+    """Extracts the path info from the given URL (or WSGI environment) and
+    path.  The path info returned is a unicode string, not a bytestring
+    suitable for a WSGI environment.  The URLs might also be IRIs.
+
+    If the path info could not be determined, `None` is returned.
+
+    Some examples:
+
+    >>> extract_path_info('http://example.com/app', '/app/hello')
+    u'/hello'
+    >>> extract_path_info('http://example.com/app',
+    ...                   'https://example.com/app/hello')
+    u'/hello'
+    >>> extract_path_info('http://example.com/app',
+    ...                   'https://example.com/app/hello',
+    ...                   collapse_http_schemes=False) is None
+    True
+
+    Instead of providing a base URL you can also pass a WSGI environment.
+
+    :param environ_or_baseurl: a WSGI environment dict, a base URL or
+                               base IRI.  This is the root of the
+                               application.
+    :param path_or_url: an absolute path from the server root, a
+                        relative path (in which case it's the path info)
+                        or a full URL.  Also accepts IRIs and unicode
+                        parameters.
+    :param charset: the charset for byte data in URLs
+    :param errors: the error handling on decode
+    :param collapse_http_schemes: if set to `False` the algorithm does
+                                  not assume that http and https on the
+                                  same server point to the same
+                                  resource.
+
+    .. versionchanged:: 0.15
+        The ``errors`` parameter defaults to leaving invalid bytes
+        quoted instead of replacing them.
+
+    .. versionadded:: 0.6
+    """
+
+    def _normalize_netloc(scheme, netloc):
+        parts = netloc.split(u"@", 1)[-1].split(u":", 1)
+        if len(parts) == 2:
+            netloc, port = parts
+            if (scheme == u"http" and port == u"80") or (
+                scheme == u"https" and port == u"443"
+            ):
+                port = None
+        else:
+            netloc = parts[0]
+            port = None
+        if port is not None:
+            netloc += u":" + port
+        return netloc
+
+    # make sure whatever we are working on is a IRI and parse it
+    path = uri_to_iri(path_or_url, charset, errors)
+    if isinstance(environ_or_baseurl, dict):
+        environ_or_baseurl = get_current_url(environ_or_baseurl, root_only=True)
+    base_iri = uri_to_iri(environ_or_baseurl, charset, errors)
+    base_scheme, base_netloc, base_path = url_parse(base_iri)[:3]
+    cur_scheme, cur_netloc, cur_path, = url_parse(url_join(base_iri, path))[:3]
+
+    # normalize the network location
+    base_netloc = _normalize_netloc(base_scheme, base_netloc)
+    cur_netloc = _normalize_netloc(cur_scheme, cur_netloc)
+
+    # is that IRI even on a known HTTP scheme?
+    if collapse_http_schemes:
+        for scheme in base_scheme, cur_scheme:
+            if scheme not in (u"http", u"https"):
+                return None
+    else:
+        if not (base_scheme in (u"http", u"https") and base_scheme == cur_scheme):
+            return None
+
+    # are the netlocs compatible?
+    if base_netloc != cur_netloc:
+        return None
+
+    # are we below the application path?
+    base_path = base_path.rstrip(u"/")
+    if not cur_path.startswith(base_path):
+        return None
+
+    return u"/" + cur_path[len(base_path) :].lstrip(u"/")
+
+
+@implements_iterator
+class ClosingIterator(object):
+    """The WSGI specification requires that all middlewares and gateways
+    respect the `close` callback of the iterable returned by the application.
+    Because it is useful to add another close action to a returned iterable
+    and adding a custom iterable is a boring task this class can be used for
+    that::
+
+        return ClosingIterator(app(environ, start_response), [cleanup_session,
+                                                              cleanup_locals])
+
+    If there is just one close function it can be passed instead of the list.
+
+    A closing iterator is not needed if the application uses response objects
+    and finishes the processing if the response is started::
+
+        try:
+            return response(environ, start_response)
+        finally:
+            cleanup_session()
+            cleanup_locals()
+    """
+
+    def __init__(self, iterable, callbacks=None):
+        iterator = iter(iterable)
+        self._next = partial(next, iterator)
+        if callbacks is None:
+            callbacks = []
+        elif callable(callbacks):
+            callbacks = [callbacks]
+        else:
+            callbacks = list(callbacks)
+        iterable_close = getattr(iterable, "close", None)
+        if iterable_close:
+            callbacks.insert(0, iterable_close)
+        self._callbacks = callbacks
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        return self._next()
+
+    def close(self):
+        for callback in self._callbacks:
+            callback()
+
+
+def wrap_file(environ, file, buffer_size=8192):
+    """Wraps a file.  This uses the WSGI server's file wrapper if available
+    or otherwise the generic :class:`FileWrapper`.
+
+    .. versionadded:: 0.5
+
+    If the file wrapper from the WSGI server is used it's important to not
+    iterate over it from inside the application but to pass it through
+    unchanged.  If you want to pass out a file wrapper inside a response
+    object you have to set :attr:`~BaseResponse.direct_passthrough` to `True`.
+
+    More information about file wrappers are available in :pep:`333`.
+
+    :param file: a :class:`file`-like object with a :meth:`~file.read` method.
+    :param buffer_size: number of bytes for one iteration.
+    """
+    return environ.get("wsgi.file_wrapper", FileWrapper)(file, buffer_size)
+
+
+@implements_iterator
+class FileWrapper(object):
+    """This class can be used to convert a :class:`file`-like object into
+    an iterable.  It yields `buffer_size` blocks until the file is fully
+    read.
+
+    You should not use this class directly but rather use the
+    :func:`wrap_file` function that uses the WSGI server's file wrapper
+    support if it's available.
+
+    .. versionadded:: 0.5
+
+    If you're using this object together with a :class:`BaseResponse` you have
+    to use the `direct_passthrough` mode.
+
+    :param file: a :class:`file`-like object with a :meth:`~file.read` method.
+    :param buffer_size: number of bytes for one iteration.
+    """
+
+    def __init__(self, file, buffer_size=8192):
+        self.file = file
+        self.buffer_size = buffer_size
+
+    def close(self):
+        if hasattr(self.file, "close"):
+            self.file.close()
+
+    def seekable(self):
+        if hasattr(self.file, "seekable"):
+            return self.file.seekable()
+        if hasattr(self.file, "seek"):
+            return True
+        return False
+
+    def seek(self, *args):
+        if hasattr(self.file, "seek"):
+            self.file.seek(*args)
+
+    def tell(self):
+        if hasattr(self.file, "tell"):
+            return self.file.tell()
+        return None
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        data = self.file.read(self.buffer_size)
+        if data:
+            return data
+        raise StopIteration()
+
+
+@implements_iterator
+class _RangeWrapper(object):
+    # private for now, but should we make it public in the future ?
+
+    """This class can be used to convert an iterable object into
+    an iterable that will only yield a piece of the underlying content.
+    It yields blocks until the underlying stream range is fully read.
+    The yielded blocks will have a size that can't exceed the original
+    iterator defined block size, but that can be smaller.
+
+    If you're using this object together with a :class:`BaseResponse` you have
+    to use the `direct_passthrough` mode.
+
+    :param iterable: an iterable object with a :meth:`__next__` method.
+    :param start_byte: byte from which read will start.
+    :param byte_range: how many bytes to read.
+    """
+
+    def __init__(self, iterable, start_byte=0, byte_range=None):
+        self.iterable = iter(iterable)
+        self.byte_range = byte_range
+        self.start_byte = start_byte
+        self.end_byte = None
+        if byte_range is not None:
+            self.end_byte = self.start_byte + self.byte_range
+        self.read_length = 0
+        self.seekable = hasattr(iterable, "seekable") and iterable.seekable()
+        self.end_reached = False
+
+    def __iter__(self):
+        return self
+
+    def _next_chunk(self):
+        try:
+            chunk = next(self.iterable)
+            self.read_length += len(chunk)
+            return chunk
+        except StopIteration:
+            self.end_reached = True
+            raise
+
+    def _first_iteration(self):
+        chunk = None
+        if self.seekable:
+            self.iterable.seek(self.start_byte)
+            self.read_length = self.iterable.tell()
+            contextual_read_length = self.read_length
+        else:
+            while self.read_length <= self.start_byte:
+                chunk = self._next_chunk()
+            if chunk is not None:
+                chunk = chunk[self.start_byte - self.read_length :]
+            contextual_read_length = self.start_byte
+        return chunk, contextual_read_length
+
+    def _next(self):
+        if self.end_reached:
+            raise StopIteration()
+        chunk = None
+        contextual_read_length = self.read_length
+        if self.read_length == 0:
+            chunk, contextual_read_length = self._first_iteration()
+        if chunk is None:
+            chunk = self._next_chunk()
+        if self.end_byte is not None and self.read_length >= self.end_byte:
+            self.end_reached = True
+            return chunk[: self.end_byte - contextual_read_length]
+        return chunk
+
+    def __next__(self):
+        chunk = self._next()
+        if chunk:
+            return chunk
+        self.end_reached = True
+        raise StopIteration()
+
+    def close(self):
+        if hasattr(self.iterable, "close"):
+            self.iterable.close()
+
+
+def _make_chunk_iter(stream, limit, buffer_size):
+    """Helper for the line and chunk iter functions."""
+    if isinstance(stream, (bytes, bytearray, text_type)):
+        raise TypeError(
+            "Passed a string or byte object instead of true iterator or stream."
+        )
+    if not hasattr(stream, "read"):
+        for item in stream:
+            if item:
+                yield item
+        return
+    if not isinstance(stream, LimitedStream) and limit is not None:
+        stream = LimitedStream(stream, limit)
+    _read = stream.read
+    while 1:
+        item = _read(buffer_size)
+        if not item:
+            break
+        yield item
+
+
+def make_line_iter(stream, limit=None, buffer_size=10 * 1024, cap_at_buffer=False):
+    """Safely iterates line-based over an input stream.  If the input stream
+    is not a :class:`LimitedStream` the `limit` parameter is mandatory.
+
+    This uses the stream's :meth:`~file.read` method internally as opposite
+    to the :meth:`~file.readline` method that is unsafe and can only be used
+    in violation of the WSGI specification.  The same problem applies to the
+    `__iter__` function of the input stream which calls :meth:`~file.readline`
+    without arguments.
+
+    If you need line-by-line processing it's strongly recommended to iterate
+    over the input stream using this helper function.
+
+    .. versionchanged:: 0.8
+       This function now ensures that the limit was reached.
+
+    .. versionadded:: 0.9
+       added support for iterators as input stream.
+
+    .. versionadded:: 0.11.10
+       added support for the `cap_at_buffer` parameter.
+
+    :param stream: the stream or iterate to iterate over.
+    :param limit: the limit in bytes for the stream.  (Usually
+                  content length.  Not necessary if the `stream`
+                  is a :class:`LimitedStream`.
+    :param buffer_size: The optional buffer size.
+    :param cap_at_buffer: if this is set chunks are split if they are longer
+                          than the buffer size.  Internally this is implemented
+                          that the buffer size might be exhausted by a factor
+                          of two however.
+    """
+    _iter = _make_chunk_iter(stream, limit, buffer_size)
+
+    first_item = next(_iter, "")
+    if not first_item:
+        return
+
+    s = make_literal_wrapper(first_item)
+    empty = s("")
+    cr = s("\r")
+    lf = s("\n")
+    crlf = s("\r\n")
+
+    _iter = chain((first_item,), _iter)
+
+    def _iter_basic_lines():
+        _join = empty.join
+        buffer = []
+        while 1:
+            new_data = next(_iter, "")
+            if not new_data:
+                break
+            new_buf = []
+            buf_size = 0
+            for item in chain(buffer, new_data.splitlines(True)):
+                new_buf.append(item)
+                buf_size += len(item)
+                if item and item[-1:] in crlf:
+                    yield _join(new_buf)
+                    new_buf = []
+                elif cap_at_buffer and buf_size >= buffer_size:
+                    rv = _join(new_buf)
+                    while len(rv) >= buffer_size:
+                        yield rv[:buffer_size]
+                        rv = rv[buffer_size:]
+                    new_buf = [rv]
+            buffer = new_buf
+        if buffer:
+            yield _join(buffer)
+
+    # This hackery is necessary to merge 'foo\r' and '\n' into one item
+    # of 'foo\r\n' if we were unlucky and we hit a chunk boundary.
+    previous = empty
+    for item in _iter_basic_lines():
+        if item == lf and previous[-1:] == cr:
+            previous += item
+            item = empty
+        if previous:
+            yield previous
+        previous = item
+    if previous:
+        yield previous
+
+
+def make_chunk_iter(
+    stream, separator, limit=None, buffer_size=10 * 1024, cap_at_buffer=False
+):
+    """Works like :func:`make_line_iter` but accepts a separator
+    which divides chunks.  If you want newline based processing
+    you should use :func:`make_line_iter` instead as it
+    supports arbitrary newline markers.
+
+    .. versionadded:: 0.8
+
+    .. versionadded:: 0.9
+       added support for iterators as input stream.
+
+    .. versionadded:: 0.11.10
+       added support for the `cap_at_buffer` parameter.
+
+    :param stream: the stream or iterate to iterate over.
+    :param separator: the separator that divides chunks.
+    :param limit: the limit in bytes for the stream.  (Usually
+                  content length.  Not necessary if the `stream`
+                  is otherwise already limited).
+    :param buffer_size: The optional buffer size.
+    :param cap_at_buffer: if this is set chunks are split if they are longer
+                          than the buffer size.  Internally this is implemented
+                          that the buffer size might be exhausted by a factor
+                          of two however.
+    """
+    _iter = _make_chunk_iter(stream, limit, buffer_size)
+
+    first_item = next(_iter, "")
+    if not first_item:
+        return
+
+    _iter = chain((first_item,), _iter)
+    if isinstance(first_item, text_type):
+        separator = to_unicode(separator)
+        _split = re.compile(r"(%s)" % re.escape(separator)).split
+        _join = u"".join
+    else:
+        separator = to_bytes(separator)
+        _split = re.compile(b"(" + re.escape(separator) + b")").split
+        _join = b"".join
+
+    buffer = []
+    while 1:
+        new_data = next(_iter, "")
+        if not new_data:
+            break
+        chunks = _split(new_data)
+        new_buf = []
+        buf_size = 0
+        for item in chain(buffer, chunks):
+            if item == separator:
+                yield _join(new_buf)
+                new_buf = []
+                buf_size = 0
+            else:
+                buf_size += len(item)
+                new_buf.append(item)
+
+                if cap_at_buffer and buf_size >= buffer_size:
+                    rv = _join(new_buf)
+                    while len(rv) >= buffer_size:
+                        yield rv[:buffer_size]
+                        rv = rv[buffer_size:]
+                    new_buf = [rv]
+                    buf_size = len(rv)
+
+        buffer = new_buf
+    if buffer:
+        yield _join(buffer)
+
+
+@implements_iterator
+class LimitedStream(io.IOBase):
+    """Wraps a stream so that it doesn't read more than n bytes.  If the
+    stream is exhausted and the caller tries to get more bytes from it
+    :func:`on_exhausted` is called which by default returns an empty
+    string.  The return value of that function is forwarded
+    to the reader function.  So if it returns an empty string
+    :meth:`read` will return an empty string as well.
+
+    The limit however must never be higher than what the stream can
+    output.  Otherwise :meth:`readlines` will try to read past the
+    limit.
+
+    .. admonition:: Note on WSGI compliance
+
+       calls to :meth:`readline` and :meth:`readlines` are not
+       WSGI compliant because it passes a size argument to the
+       readline methods.  Unfortunately the WSGI PEP is not safely
+       implementable without a size argument to :meth:`readline`
+       because there is no EOF marker in the stream.  As a result
+       of that the use of :meth:`readline` is discouraged.
+
+       For the same reason iterating over the :class:`LimitedStream`
+       is not portable.  It internally calls :meth:`readline`.
+
+       We strongly suggest using :meth:`read` only or using the
+       :func:`make_line_iter` which safely iterates line-based
+       over a WSGI input stream.
+
+    :param stream: the stream to wrap.
+    :param limit: the limit for the stream, must not be longer than
+                  what the string can provide if the stream does not
+                  end with `EOF` (like `wsgi.input`)
+    """
+
+    def __init__(self, stream, limit):
+        self._read = stream.read
+        self._readline = stream.readline
+        self._pos = 0
+        self.limit = limit
+
+    def __iter__(self):
+        return self
+
+    @property
+    def is_exhausted(self):
+        """If the stream is exhausted this attribute is `True`."""
+        return self._pos >= self.limit
+
+    def on_exhausted(self):
+        """This is called when the stream tries to read past the limit.
+        The return value of this function is returned from the reading
+        function.
+        """
+        # Read null bytes from the stream so that we get the
+        # correct end of stream marker.
+        return self._read(0)
+
+    def on_disconnect(self):
+        """What should happen if a disconnect is detected?  The return
+        value of this function is returned from read functions in case
+        the client went away.  By default a
+        :exc:`~werkzeug.exceptions.ClientDisconnected` exception is raised.
+        """
+        from .exceptions import ClientDisconnected
+
+        raise ClientDisconnected()
+
+    def exhaust(self, chunk_size=1024 * 64):
+        """Exhaust the stream.  This consumes all the data left until the
+        limit is reached.
+
+        :param chunk_size: the size for a chunk.  It will read the chunk
+                           until the stream is exhausted and throw away
+                           the results.
+        """
+        to_read = self.limit - self._pos
+        chunk = chunk_size
+        while to_read > 0:
+            chunk = min(to_read, chunk)
+            self.read(chunk)
+            to_read -= chunk
+
+    def read(self, size=None):
+        """Read `size` bytes or if size is not provided everything is read.
+
+        :param size: the number of bytes read.
+        """
+        if self._pos >= self.limit:
+            return self.on_exhausted()
+        if size is None or size == -1:  # -1 is for consistence with file
+            size = self.limit
+        to_read = min(self.limit - self._pos, size)
+        try:
+            read = self._read(to_read)
+        except (IOError, ValueError):
+            return self.on_disconnect()
+        if to_read and len(read) != to_read:
+            return self.on_disconnect()
+        self._pos += len(read)
+        return read
+
+    def readline(self, size=None):
+        """Reads one line from the stream."""
+        if self._pos >= self.limit:
+            return self.on_exhausted()
+        if size is None:
+            size = self.limit - self._pos
+        else:
+            size = min(size, self.limit - self._pos)
+        try:
+            line = self._readline(size)
+        except (ValueError, IOError):
+            return self.on_disconnect()
+        if size and not line:
+            return self.on_disconnect()
+        self._pos += len(line)
+        return line
+
+    def readlines(self, size=None):
+        """Reads a file into a list of strings.  It calls :meth:`readline`
+        until the file is read to the end.  It does support the optional
+        `size` argument if the underlying stream supports it for
+        `readline`.
+        """
+        last_pos = self._pos
+        result = []
+        if size is not None:
+            end = min(self.limit, last_pos + size)
+        else:
+            end = self.limit
+        while 1:
+            if size is not None:
+                size -= last_pos - self._pos
+            if self._pos >= end:
+                break
+            result.append(self.readline(size))
+            if size is not None:
+                last_pos = self._pos
+        return result
+
+    def tell(self):
+        """Returns the position of the stream.
+
+        .. versionadded:: 0.9
+        """
+        return self._pos
+
+    def __next__(self):
+        line = self.readline()
+        if not line:
+            raise StopIteration()
+        return line
+
+    def readable(self):
+        return True
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/__init__.py b/python3-vckonline/lib/python3.8/site-packages/yaml/__init__.py
new file mode 100644
index 0000000..13d687c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/__init__.py
@@ -0,0 +1,427 @@
+
+from .error import *
+
+from .tokens import *
+from .events import *
+from .nodes import *
+
+from .loader import *
+from .dumper import *
+
+__version__ = '5.3.1'
+try:
+    from .cyaml import *
+    __with_libyaml__ = True
+except ImportError:
+    __with_libyaml__ = False
+
+import io
+
+#------------------------------------------------------------------------------
+# Warnings control
+#------------------------------------------------------------------------------
+
+# 'Global' warnings state:
+_warnings_enabled = {
+    'YAMLLoadWarning': True,
+}
+
+# Get or set global warnings' state
+def warnings(settings=None):
+    if settings is None:
+        return _warnings_enabled
+
+    if type(settings) is dict:
+        for key in settings:
+            if key in _warnings_enabled:
+                _warnings_enabled[key] = settings[key]
+
+# Warn when load() is called without Loader=...
+class YAMLLoadWarning(RuntimeWarning):
+    pass
+
+def load_warning(method):
+    if _warnings_enabled['YAMLLoadWarning'] is False:
+        return
+
+    import warnings
+
+    message = (
+        "calling yaml.%s() without Loader=... is deprecated, as the "
+        "default Loader is unsafe. Please read "
+        "https://msg.pyyaml.org/load for full details."
+    ) % method
+
+    warnings.warn(message, YAMLLoadWarning, stacklevel=3)
+
+#------------------------------------------------------------------------------
+def scan(stream, Loader=Loader):
+    """
+    Scan a YAML stream and produce scanning tokens.
+    """
+    loader = Loader(stream)
+    try:
+        while loader.check_token():
+            yield loader.get_token()
+    finally:
+        loader.dispose()
+
+def parse(stream, Loader=Loader):
+    """
+    Parse a YAML stream and produce parsing events.
+    """
+    loader = Loader(stream)
+    try:
+        while loader.check_event():
+            yield loader.get_event()
+    finally:
+        loader.dispose()
+
+def compose(stream, Loader=Loader):
+    """
+    Parse the first YAML document in a stream
+    and produce the corresponding representation tree.
+    """
+    loader = Loader(stream)
+    try:
+        return loader.get_single_node()
+    finally:
+        loader.dispose()
+
+def compose_all(stream, Loader=Loader):
+    """
+    Parse all YAML documents in a stream
+    and produce corresponding representation trees.
+    """
+    loader = Loader(stream)
+    try:
+        while loader.check_node():
+            yield loader.get_node()
+    finally:
+        loader.dispose()
+
+def load(stream, Loader=None):
+    """
+    Parse the first YAML document in a stream
+    and produce the corresponding Python object.
+    """
+    if Loader is None:
+        load_warning('load')
+        Loader = FullLoader
+
+    loader = Loader(stream)
+    try:
+        return loader.get_single_data()
+    finally:
+        loader.dispose()
+
+def load_all(stream, Loader=None):
+    """
+    Parse all YAML documents in a stream
+    and produce corresponding Python objects.
+    """
+    if Loader is None:
+        load_warning('load_all')
+        Loader = FullLoader
+
+    loader = Loader(stream)
+    try:
+        while loader.check_data():
+            yield loader.get_data()
+    finally:
+        loader.dispose()
+
+def full_load(stream):
+    """
+    Parse the first YAML document in a stream
+    and produce the corresponding Python object.
+
+    Resolve all tags except those known to be
+    unsafe on untrusted input.
+    """
+    return load(stream, FullLoader)
+
+def full_load_all(stream):
+    """
+    Parse all YAML documents in a stream
+    and produce corresponding Python objects.
+
+    Resolve all tags except those known to be
+    unsafe on untrusted input.
+    """
+    return load_all(stream, FullLoader)
+
+def safe_load(stream):
+    """
+    Parse the first YAML document in a stream
+    and produce the corresponding Python object.
+
+    Resolve only basic YAML tags. This is known
+    to be safe for untrusted input.
+    """
+    return load(stream, SafeLoader)
+
+def safe_load_all(stream):
+    """
+    Parse all YAML documents in a stream
+    and produce corresponding Python objects.
+
+    Resolve only basic YAML tags. This is known
+    to be safe for untrusted input.
+    """
+    return load_all(stream, SafeLoader)
+
+def unsafe_load(stream):
+    """
+    Parse the first YAML document in a stream
+    and produce the corresponding Python object.
+
+    Resolve all tags, even those known to be
+    unsafe on untrusted input.
+    """
+    return load(stream, UnsafeLoader)
+
+def unsafe_load_all(stream):
+    """
+    Parse all YAML documents in a stream
+    and produce corresponding Python objects.
+
+    Resolve all tags, even those known to be
+    unsafe on untrusted input.
+    """
+    return load_all(stream, UnsafeLoader)
+
+def emit(events, stream=None, Dumper=Dumper,
+        canonical=None, indent=None, width=None,
+        allow_unicode=None, line_break=None):
+    """
+    Emit YAML parsing events into a stream.
+    If stream is None, return the produced string instead.
+    """
+    getvalue = None
+    if stream is None:
+        stream = io.StringIO()
+        getvalue = stream.getvalue
+    dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,
+            allow_unicode=allow_unicode, line_break=line_break)
+    try:
+        for event in events:
+            dumper.emit(event)
+    finally:
+        dumper.dispose()
+    if getvalue:
+        return getvalue()
+
+def serialize_all(nodes, stream=None, Dumper=Dumper,
+        canonical=None, indent=None, width=None,
+        allow_unicode=None, line_break=None,
+        encoding=None, explicit_start=None, explicit_end=None,
+        version=None, tags=None):
+    """
+    Serialize a sequence of representation trees into a YAML stream.
+    If stream is None, return the produced string instead.
+    """
+    getvalue = None
+    if stream is None:
+        if encoding is None:
+            stream = io.StringIO()
+        else:
+            stream = io.BytesIO()
+        getvalue = stream.getvalue
+    dumper = Dumper(stream, canonical=canonical, indent=indent, width=width,
+            allow_unicode=allow_unicode, line_break=line_break,
+            encoding=encoding, version=version, tags=tags,
+            explicit_start=explicit_start, explicit_end=explicit_end)
+    try:
+        dumper.open()
+        for node in nodes:
+            dumper.serialize(node)
+        dumper.close()
+    finally:
+        dumper.dispose()
+    if getvalue:
+        return getvalue()
+
+def serialize(node, stream=None, Dumper=Dumper, **kwds):
+    """
+    Serialize a representation tree into a YAML stream.
+    If stream is None, return the produced string instead.
+    """
+    return serialize_all([node], stream, Dumper=Dumper, **kwds)
+
+def dump_all(documents, stream=None, Dumper=Dumper,
+        default_style=None, default_flow_style=False,
+        canonical=None, indent=None, width=None,
+        allow_unicode=None, line_break=None,
+        encoding=None, explicit_start=None, explicit_end=None,
+        version=None, tags=None, sort_keys=True):
+    """
+    Serialize a sequence of Python objects into a YAML stream.
+    If stream is None, return the produced string instead.
+    """
+    getvalue = None
+    if stream is None:
+        if encoding is None:
+            stream = io.StringIO()
+        else:
+            stream = io.BytesIO()
+        getvalue = stream.getvalue
+    dumper = Dumper(stream, default_style=default_style,
+            default_flow_style=default_flow_style,
+            canonical=canonical, indent=indent, width=width,
+            allow_unicode=allow_unicode, line_break=line_break,
+            encoding=encoding, version=version, tags=tags,
+            explicit_start=explicit_start, explicit_end=explicit_end, sort_keys=sort_keys)
+    try:
+        dumper.open()
+        for data in documents:
+            dumper.represent(data)
+        dumper.close()
+    finally:
+        dumper.dispose()
+    if getvalue:
+        return getvalue()
+
+def dump(data, stream=None, Dumper=Dumper, **kwds):
+    """
+    Serialize a Python object into a YAML stream.
+    If stream is None, return the produced string instead.
+    """
+    return dump_all([data], stream, Dumper=Dumper, **kwds)
+
+def safe_dump_all(documents, stream=None, **kwds):
+    """
+    Serialize a sequence of Python objects into a YAML stream.
+    Produce only basic YAML tags.
+    If stream is None, return the produced string instead.
+    """
+    return dump_all(documents, stream, Dumper=SafeDumper, **kwds)
+
+def safe_dump(data, stream=None, **kwds):
+    """
+    Serialize a Python object into a YAML stream.
+    Produce only basic YAML tags.
+    If stream is None, return the produced string instead.
+    """
+    return dump_all([data], stream, Dumper=SafeDumper, **kwds)
+
+def add_implicit_resolver(tag, regexp, first=None,
+        Loader=None, Dumper=Dumper):
+    """
+    Add an implicit scalar detector.
+    If an implicit scalar value matches the given regexp,
+    the corresponding tag is assigned to the scalar.
+    first is a sequence of possible initial characters or None.
+    """
+    if Loader is None:
+        loader.Loader.add_implicit_resolver(tag, regexp, first)
+        loader.FullLoader.add_implicit_resolver(tag, regexp, first)
+        loader.UnsafeLoader.add_implicit_resolver(tag, regexp, first)
+    else:
+        Loader.add_implicit_resolver(tag, regexp, first)
+    Dumper.add_implicit_resolver(tag, regexp, first)
+
+def add_path_resolver(tag, path, kind=None, Loader=None, Dumper=Dumper):
+    """
+    Add a path based resolver for the given tag.
+    A path is a list of keys that forms a path
+    to a node in the representation tree.
+    Keys can be string values, integers, or None.
+    """
+    if Loader is None:
+        loader.Loader.add_path_resolver(tag, path, kind)
+        loader.FullLoader.add_path_resolver(tag, path, kind)
+        loader.UnsafeLoader.add_path_resolver(tag, path, kind)
+    else:
+        Loader.add_path_resolver(tag, path, kind)
+    Dumper.add_path_resolver(tag, path, kind)
+
+def add_constructor(tag, constructor, Loader=None):
+    """
+    Add a constructor for the given tag.
+    Constructor is a function that accepts a Loader instance
+    and a node object and produces the corresponding Python object.
+    """
+    if Loader is None:
+        loader.Loader.add_constructor(tag, constructor)
+        loader.FullLoader.add_constructor(tag, constructor)
+        loader.UnsafeLoader.add_constructor(tag, constructor)
+    else:
+        Loader.add_constructor(tag, constructor)
+
+def add_multi_constructor(tag_prefix, multi_constructor, Loader=None):
+    """
+    Add a multi-constructor for the given tag prefix.
+    Multi-constructor is called for a node if its tag starts with tag_prefix.
+    Multi-constructor accepts a Loader instance, a tag suffix,
+    and a node object and produces the corresponding Python object.
+    """
+    if Loader is None:
+        loader.Loader.add_multi_constructor(tag_prefix, multi_constructor)
+        loader.FullLoader.add_multi_constructor(tag_prefix, multi_constructor)
+        loader.UnsafeLoader.add_multi_constructor(tag_prefix, multi_constructor)
+    else:
+        Loader.add_multi_constructor(tag_prefix, multi_constructor)
+
+def add_representer(data_type, representer, Dumper=Dumper):
+    """
+    Add a representer for the given type.
+    Representer is a function accepting a Dumper instance
+    and an instance of the given data type
+    and producing the corresponding representation node.
+    """
+    Dumper.add_representer(data_type, representer)
+
+def add_multi_representer(data_type, multi_representer, Dumper=Dumper):
+    """
+    Add a representer for the given type.
+    Multi-representer is a function accepting a Dumper instance
+    and an instance of the given data type or subtype
+    and producing the corresponding representation node.
+    """
+    Dumper.add_multi_representer(data_type, multi_representer)
+
+class YAMLObjectMetaclass(type):
+    """
+    The metaclass for YAMLObject.
+    """
+    def __init__(cls, name, bases, kwds):
+        super(YAMLObjectMetaclass, cls).__init__(name, bases, kwds)
+        if 'yaml_tag' in kwds and kwds['yaml_tag'] is not None:
+            if isinstance(cls.yaml_loader, list):
+                for loader in cls.yaml_loader:
+                    loader.add_constructor(cls.yaml_tag, cls.from_yaml)
+            else:
+                cls.yaml_loader.add_constructor(cls.yaml_tag, cls.from_yaml)
+
+            cls.yaml_dumper.add_representer(cls, cls.to_yaml)
+
+class YAMLObject(metaclass=YAMLObjectMetaclass):
+    """
+    An object that can dump itself to a YAML stream
+    and load itself from a YAML stream.
+    """
+
+    __slots__ = ()  # no direct instantiation, so allow immutable subclasses
+
+    yaml_loader = [Loader, FullLoader, UnsafeLoader]
+    yaml_dumper = Dumper
+
+    yaml_tag = None
+    yaml_flow_style = None
+
+    @classmethod
+    def from_yaml(cls, loader, node):
+        """
+        Convert a representation node to a Python object.
+        """
+        return loader.construct_yaml_object(node, cls)
+
+    @classmethod
+    def to_yaml(cls, dumper, data):
+        """
+        Convert a Python object to a representation node.
+        """
+        return dumper.represent_yaml_object(cls.yaml_tag, data, cls,
+                flow_style=cls.yaml_flow_style)
+
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diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/composer.py b/python3-vckonline/lib/python3.8/site-packages/yaml/composer.py
new file mode 100644
index 0000000..6d15cb4
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/composer.py
@@ -0,0 +1,139 @@
+
+__all__ = ['Composer', 'ComposerError']
+
+from .error import MarkedYAMLError
+from .events import *
+from .nodes import *
+
+class ComposerError(MarkedYAMLError):
+    pass
+
+class Composer:
+
+    def __init__(self):
+        self.anchors = {}
+
+    def check_node(self):
+        # Drop the STREAM-START event.
+        if self.check_event(StreamStartEvent):
+            self.get_event()
+
+        # If there are more documents available?
+        return not self.check_event(StreamEndEvent)
+
+    def get_node(self):
+        # Get the root node of the next document.
+        if not self.check_event(StreamEndEvent):
+            return self.compose_document()
+
+    def get_single_node(self):
+        # Drop the STREAM-START event.
+        self.get_event()
+
+        # Compose a document if the stream is not empty.
+        document = None
+        if not self.check_event(StreamEndEvent):
+            document = self.compose_document()
+
+        # Ensure that the stream contains no more documents.
+        if not self.check_event(StreamEndEvent):
+            event = self.get_event()
+            raise ComposerError("expected a single document in the stream",
+                    document.start_mark, "but found another document",
+                    event.start_mark)
+
+        # Drop the STREAM-END event.
+        self.get_event()
+
+        return document
+
+    def compose_document(self):
+        # Drop the DOCUMENT-START event.
+        self.get_event()
+
+        # Compose the root node.
+        node = self.compose_node(None, None)
+
+        # Drop the DOCUMENT-END event.
+        self.get_event()
+
+        self.anchors = {}
+        return node
+
+    def compose_node(self, parent, index):
+        if self.check_event(AliasEvent):
+            event = self.get_event()
+            anchor = event.anchor
+            if anchor not in self.anchors:
+                raise ComposerError(None, None, "found undefined alias %r"
+                        % anchor, event.start_mark)
+            return self.anchors[anchor]
+        event = self.peek_event()
+        anchor = event.anchor
+        if anchor is not None:
+            if anchor in self.anchors:
+                raise ComposerError("found duplicate anchor %r; first occurrence"
+                        % anchor, self.anchors[anchor].start_mark,
+                        "second occurrence", event.start_mark)
+        self.descend_resolver(parent, index)
+        if self.check_event(ScalarEvent):
+            node = self.compose_scalar_node(anchor)
+        elif self.check_event(SequenceStartEvent):
+            node = self.compose_sequence_node(anchor)
+        elif self.check_event(MappingStartEvent):
+            node = self.compose_mapping_node(anchor)
+        self.ascend_resolver()
+        return node
+
+    def compose_scalar_node(self, anchor):
+        event = self.get_event()
+        tag = event.tag
+        if tag is None or tag == '!':
+            tag = self.resolve(ScalarNode, event.value, event.implicit)
+        node = ScalarNode(tag, event.value,
+                event.start_mark, event.end_mark, style=event.style)
+        if anchor is not None:
+            self.anchors[anchor] = node
+        return node
+
+    def compose_sequence_node(self, anchor):
+        start_event = self.get_event()
+        tag = start_event.tag
+        if tag is None or tag == '!':
+            tag = self.resolve(SequenceNode, None, start_event.implicit)
+        node = SequenceNode(tag, [],
+                start_event.start_mark, None,
+                flow_style=start_event.flow_style)
+        if anchor is not None:
+            self.anchors[anchor] = node
+        index = 0
+        while not self.check_event(SequenceEndEvent):
+            node.value.append(self.compose_node(node, index))
+            index += 1
+        end_event = self.get_event()
+        node.end_mark = end_event.end_mark
+        return node
+
+    def compose_mapping_node(self, anchor):
+        start_event = self.get_event()
+        tag = start_event.tag
+        if tag is None or tag == '!':
+            tag = self.resolve(MappingNode, None, start_event.implicit)
+        node = MappingNode(tag, [],
+                start_event.start_mark, None,
+                flow_style=start_event.flow_style)
+        if anchor is not None:
+            self.anchors[anchor] = node
+        while not self.check_event(MappingEndEvent):
+            #key_event = self.peek_event()
+            item_key = self.compose_node(node, None)
+            #if item_key in node.value:
+            #    raise ComposerError("while composing a mapping", start_event.start_mark,
+            #            "found duplicate key", key_event.start_mark)
+            item_value = self.compose_node(node, item_key)
+            #node.value[item_key] = item_value
+            node.value.append((item_key, item_value))
+        end_event = self.get_event()
+        node.end_mark = end_event.end_mark
+        return node
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/constructor.py b/python3-vckonline/lib/python3.8/site-packages/yaml/constructor.py
new file mode 100644
index 0000000..1948b12
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/constructor.py
@@ -0,0 +1,748 @@
+
+__all__ = [
+    'BaseConstructor',
+    'SafeConstructor',
+    'FullConstructor',
+    'UnsafeConstructor',
+    'Constructor',
+    'ConstructorError'
+]
+
+from .error import *
+from .nodes import *
+
+import collections.abc, datetime, base64, binascii, re, sys, types
+
+class ConstructorError(MarkedYAMLError):
+    pass
+
+class BaseConstructor:
+
+    yaml_constructors = {}
+    yaml_multi_constructors = {}
+
+    def __init__(self):
+        self.constructed_objects = {}
+        self.recursive_objects = {}
+        self.state_generators = []
+        self.deep_construct = False
+
+    def check_data(self):
+        # If there are more documents available?
+        return self.check_node()
+
+    def check_state_key(self, key):
+        """Block special attributes/methods from being set in a newly created
+        object, to prevent user-controlled methods from being called during
+        deserialization"""
+        if self.get_state_keys_blacklist_regexp().match(key):
+            raise ConstructorError(None, None,
+                "blacklisted key '%s' in instance state found" % (key,), None)
+
+    def get_data(self):
+        # Construct and return the next document.
+        if self.check_node():
+            return self.construct_document(self.get_node())
+
+    def get_single_data(self):
+        # Ensure that the stream contains a single document and construct it.
+        node = self.get_single_node()
+        if node is not None:
+            return self.construct_document(node)
+        return None
+
+    def construct_document(self, node):
+        data = self.construct_object(node)
+        while self.state_generators:
+            state_generators = self.state_generators
+            self.state_generators = []
+            for generator in state_generators:
+                for dummy in generator:
+                    pass
+        self.constructed_objects = {}
+        self.recursive_objects = {}
+        self.deep_construct = False
+        return data
+
+    def construct_object(self, node, deep=False):
+        if node in self.constructed_objects:
+            return self.constructed_objects[node]
+        if deep:
+            old_deep = self.deep_construct
+            self.deep_construct = True
+        if node in self.recursive_objects:
+            raise ConstructorError(None, None,
+                    "found unconstructable recursive node", node.start_mark)
+        self.recursive_objects[node] = None
+        constructor = None
+        tag_suffix = None
+        if node.tag in self.yaml_constructors:
+            constructor = self.yaml_constructors[node.tag]
+        else:
+            for tag_prefix in self.yaml_multi_constructors:
+                if tag_prefix is not None and node.tag.startswith(tag_prefix):
+                    tag_suffix = node.tag[len(tag_prefix):]
+                    constructor = self.yaml_multi_constructors[tag_prefix]
+                    break
+            else:
+                if None in self.yaml_multi_constructors:
+                    tag_suffix = node.tag
+                    constructor = self.yaml_multi_constructors[None]
+                elif None in self.yaml_constructors:
+                    constructor = self.yaml_constructors[None]
+                elif isinstance(node, ScalarNode):
+                    constructor = self.__class__.construct_scalar
+                elif isinstance(node, SequenceNode):
+                    constructor = self.__class__.construct_sequence
+                elif isinstance(node, MappingNode):
+                    constructor = self.__class__.construct_mapping
+        if tag_suffix is None:
+            data = constructor(self, node)
+        else:
+            data = constructor(self, tag_suffix, node)
+        if isinstance(data, types.GeneratorType):
+            generator = data
+            data = next(generator)
+            if self.deep_construct:
+                for dummy in generator:
+                    pass
+            else:
+                self.state_generators.append(generator)
+        self.constructed_objects[node] = data
+        del self.recursive_objects[node]
+        if deep:
+            self.deep_construct = old_deep
+        return data
+
+    def construct_scalar(self, node):
+        if not isinstance(node, ScalarNode):
+            raise ConstructorError(None, None,
+                    "expected a scalar node, but found %s" % node.id,
+                    node.start_mark)
+        return node.value
+
+    def construct_sequence(self, node, deep=False):
+        if not isinstance(node, SequenceNode):
+            raise ConstructorError(None, None,
+                    "expected a sequence node, but found %s" % node.id,
+                    node.start_mark)
+        return [self.construct_object(child, deep=deep)
+                for child in node.value]
+
+    def construct_mapping(self, node, deep=False):
+        if not isinstance(node, MappingNode):
+            raise ConstructorError(None, None,
+                    "expected a mapping node, but found %s" % node.id,
+                    node.start_mark)
+        mapping = {}
+        for key_node, value_node in node.value:
+            key = self.construct_object(key_node, deep=deep)
+            if not isinstance(key, collections.abc.Hashable):
+                raise ConstructorError("while constructing a mapping", node.start_mark,
+                        "found unhashable key", key_node.start_mark)
+            value = self.construct_object(value_node, deep=deep)
+            mapping[key] = value
+        return mapping
+
+    def construct_pairs(self, node, deep=False):
+        if not isinstance(node, MappingNode):
+            raise ConstructorError(None, None,
+                    "expected a mapping node, but found %s" % node.id,
+                    node.start_mark)
+        pairs = []
+        for key_node, value_node in node.value:
+            key = self.construct_object(key_node, deep=deep)
+            value = self.construct_object(value_node, deep=deep)
+            pairs.append((key, value))
+        return pairs
+
+    @classmethod
+    def add_constructor(cls, tag, constructor):
+        if not 'yaml_constructors' in cls.__dict__:
+            cls.yaml_constructors = cls.yaml_constructors.copy()
+        cls.yaml_constructors[tag] = constructor
+
+    @classmethod
+    def add_multi_constructor(cls, tag_prefix, multi_constructor):
+        if not 'yaml_multi_constructors' in cls.__dict__:
+            cls.yaml_multi_constructors = cls.yaml_multi_constructors.copy()
+        cls.yaml_multi_constructors[tag_prefix] = multi_constructor
+
+class SafeConstructor(BaseConstructor):
+
+    def construct_scalar(self, node):
+        if isinstance(node, MappingNode):
+            for key_node, value_node in node.value:
+                if key_node.tag == 'tag:yaml.org,2002:value':
+                    return self.construct_scalar(value_node)
+        return super().construct_scalar(node)
+
+    def flatten_mapping(self, node):
+        merge = []
+        index = 0
+        while index < len(node.value):
+            key_node, value_node = node.value[index]
+            if key_node.tag == 'tag:yaml.org,2002:merge':
+                del node.value[index]
+                if isinstance(value_node, MappingNode):
+                    self.flatten_mapping(value_node)
+                    merge.extend(value_node.value)
+                elif isinstance(value_node, SequenceNode):
+                    submerge = []
+                    for subnode in value_node.value:
+                        if not isinstance(subnode, MappingNode):
+                            raise ConstructorError("while constructing a mapping",
+                                    node.start_mark,
+                                    "expected a mapping for merging, but found %s"
+                                    % subnode.id, subnode.start_mark)
+                        self.flatten_mapping(subnode)
+                        submerge.append(subnode.value)
+                    submerge.reverse()
+                    for value in submerge:
+                        merge.extend(value)
+                else:
+                    raise ConstructorError("while constructing a mapping", node.start_mark,
+                            "expected a mapping or list of mappings for merging, but found %s"
+                            % value_node.id, value_node.start_mark)
+            elif key_node.tag == 'tag:yaml.org,2002:value':
+                key_node.tag = 'tag:yaml.org,2002:str'
+                index += 1
+            else:
+                index += 1
+        if merge:
+            node.value = merge + node.value
+
+    def construct_mapping(self, node, deep=False):
+        if isinstance(node, MappingNode):
+            self.flatten_mapping(node)
+        return super().construct_mapping(node, deep=deep)
+
+    def construct_yaml_null(self, node):
+        self.construct_scalar(node)
+        return None
+
+    bool_values = {
+        'yes':      True,
+        'no':       False,
+        'true':     True,
+        'false':    False,
+        'on':       True,
+        'off':      False,
+    }
+
+    def construct_yaml_bool(self, node):
+        value = self.construct_scalar(node)
+        return self.bool_values[value.lower()]
+
+    def construct_yaml_int(self, node):
+        value = self.construct_scalar(node)
+        value = value.replace('_', '')
+        sign = +1
+        if value[0] == '-':
+            sign = -1
+        if value[0] in '+-':
+            value = value[1:]
+        if value == '0':
+            return 0
+        elif value.startswith('0b'):
+            return sign*int(value[2:], 2)
+        elif value.startswith('0x'):
+            return sign*int(value[2:], 16)
+        elif value[0] == '0':
+            return sign*int(value, 8)
+        elif ':' in value:
+            digits = [int(part) for part in value.split(':')]
+            digits.reverse()
+            base = 1
+            value = 0
+            for digit in digits:
+                value += digit*base
+                base *= 60
+            return sign*value
+        else:
+            return sign*int(value)
+
+    inf_value = 1e300
+    while inf_value != inf_value*inf_value:
+        inf_value *= inf_value
+    nan_value = -inf_value/inf_value   # Trying to make a quiet NaN (like C99).
+
+    def construct_yaml_float(self, node):
+        value = self.construct_scalar(node)
+        value = value.replace('_', '').lower()
+        sign = +1
+        if value[0] == '-':
+            sign = -1
+        if value[0] in '+-':
+            value = value[1:]
+        if value == '.inf':
+            return sign*self.inf_value
+        elif value == '.nan':
+            return self.nan_value
+        elif ':' in value:
+            digits = [float(part) for part in value.split(':')]
+            digits.reverse()
+            base = 1
+            value = 0.0
+            for digit in digits:
+                value += digit*base
+                base *= 60
+            return sign*value
+        else:
+            return sign*float(value)
+
+    def construct_yaml_binary(self, node):
+        try:
+            value = self.construct_scalar(node).encode('ascii')
+        except UnicodeEncodeError as exc:
+            raise ConstructorError(None, None,
+                    "failed to convert base64 data into ascii: %s" % exc,
+                    node.start_mark)
+        try:
+            if hasattr(base64, 'decodebytes'):
+                return base64.decodebytes(value)
+            else:
+                return base64.decodestring(value)
+        except binascii.Error as exc:
+            raise ConstructorError(None, None,
+                    "failed to decode base64 data: %s" % exc, node.start_mark)
+
+    timestamp_regexp = re.compile(
+            r'''^(?P<year>[0-9][0-9][0-9][0-9])
+                -(?P<month>[0-9][0-9]?)
+                -(?P<day>[0-9][0-9]?)
+                (?:(?:[Tt]|[ \t]+)
+                (?P<hour>[0-9][0-9]?)
+                :(?P<minute>[0-9][0-9])
+                :(?P<second>[0-9][0-9])
+                (?:\.(?P<fraction>[0-9]*))?
+                (?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
+                (?::(?P<tz_minute>[0-9][0-9]))?))?)?$''', re.X)
+
+    def construct_yaml_timestamp(self, node):
+        value = self.construct_scalar(node)
+        match = self.timestamp_regexp.match(node.value)
+        values = match.groupdict()
+        year = int(values['year'])
+        month = int(values['month'])
+        day = int(values['day'])
+        if not values['hour']:
+            return datetime.date(year, month, day)
+        hour = int(values['hour'])
+        minute = int(values['minute'])
+        second = int(values['second'])
+        fraction = 0
+        tzinfo = None
+        if values['fraction']:
+            fraction = values['fraction'][:6]
+            while len(fraction) < 6:
+                fraction += '0'
+            fraction = int(fraction)
+        if values['tz_sign']:
+            tz_hour = int(values['tz_hour'])
+            tz_minute = int(values['tz_minute'] or 0)
+            delta = datetime.timedelta(hours=tz_hour, minutes=tz_minute)
+            if values['tz_sign'] == '-':
+                delta = -delta
+            tzinfo = datetime.timezone(delta)
+        elif values['tz']:
+            tzinfo = datetime.timezone.utc
+        return datetime.datetime(year, month, day, hour, minute, second, fraction,
+                                 tzinfo=tzinfo)
+
+    def construct_yaml_omap(self, node):
+        # Note: we do not check for duplicate keys, because it's too
+        # CPU-expensive.
+        omap = []
+        yield omap
+        if not isinstance(node, SequenceNode):
+            raise ConstructorError("while constructing an ordered map", node.start_mark,
+                    "expected a sequence, but found %s" % node.id, node.start_mark)
+        for subnode in node.value:
+            if not isinstance(subnode, MappingNode):
+                raise ConstructorError("while constructing an ordered map", node.start_mark,
+                        "expected a mapping of length 1, but found %s" % subnode.id,
+                        subnode.start_mark)
+            if len(subnode.value) != 1:
+                raise ConstructorError("while constructing an ordered map", node.start_mark,
+                        "expected a single mapping item, but found %d items" % len(subnode.value),
+                        subnode.start_mark)
+            key_node, value_node = subnode.value[0]
+            key = self.construct_object(key_node)
+            value = self.construct_object(value_node)
+            omap.append((key, value))
+
+    def construct_yaml_pairs(self, node):
+        # Note: the same code as `construct_yaml_omap`.
+        pairs = []
+        yield pairs
+        if not isinstance(node, SequenceNode):
+            raise ConstructorError("while constructing pairs", node.start_mark,
+                    "expected a sequence, but found %s" % node.id, node.start_mark)
+        for subnode in node.value:
+            if not isinstance(subnode, MappingNode):
+                raise ConstructorError("while constructing pairs", node.start_mark,
+                        "expected a mapping of length 1, but found %s" % subnode.id,
+                        subnode.start_mark)
+            if len(subnode.value) != 1:
+                raise ConstructorError("while constructing pairs", node.start_mark,
+                        "expected a single mapping item, but found %d items" % len(subnode.value),
+                        subnode.start_mark)
+            key_node, value_node = subnode.value[0]
+            key = self.construct_object(key_node)
+            value = self.construct_object(value_node)
+            pairs.append((key, value))
+
+    def construct_yaml_set(self, node):
+        data = set()
+        yield data
+        value = self.construct_mapping(node)
+        data.update(value)
+
+    def construct_yaml_str(self, node):
+        return self.construct_scalar(node)
+
+    def construct_yaml_seq(self, node):
+        data = []
+        yield data
+        data.extend(self.construct_sequence(node))
+
+    def construct_yaml_map(self, node):
+        data = {}
+        yield data
+        value = self.construct_mapping(node)
+        data.update(value)
+
+    def construct_yaml_object(self, node, cls):
+        data = cls.__new__(cls)
+        yield data
+        if hasattr(data, '__setstate__'):
+            state = self.construct_mapping(node, deep=True)
+            data.__setstate__(state)
+        else:
+            state = self.construct_mapping(node)
+            data.__dict__.update(state)
+
+    def construct_undefined(self, node):
+        raise ConstructorError(None, None,
+                "could not determine a constructor for the tag %r" % node.tag,
+                node.start_mark)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:null',
+        SafeConstructor.construct_yaml_null)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:bool',
+        SafeConstructor.construct_yaml_bool)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:int',
+        SafeConstructor.construct_yaml_int)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:float',
+        SafeConstructor.construct_yaml_float)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:binary',
+        SafeConstructor.construct_yaml_binary)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:timestamp',
+        SafeConstructor.construct_yaml_timestamp)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:omap',
+        SafeConstructor.construct_yaml_omap)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:pairs',
+        SafeConstructor.construct_yaml_pairs)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:set',
+        SafeConstructor.construct_yaml_set)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:str',
+        SafeConstructor.construct_yaml_str)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:seq',
+        SafeConstructor.construct_yaml_seq)
+
+SafeConstructor.add_constructor(
+        'tag:yaml.org,2002:map',
+        SafeConstructor.construct_yaml_map)
+
+SafeConstructor.add_constructor(None,
+        SafeConstructor.construct_undefined)
+
+class FullConstructor(SafeConstructor):
+    # 'extend' is blacklisted because it is used by
+    # construct_python_object_apply to add `listitems` to a newly generate
+    # python instance
+    def get_state_keys_blacklist(self):
+        return ['^extend$', '^__.*__$']
+
+    def get_state_keys_blacklist_regexp(self):
+        if not hasattr(self, 'state_keys_blacklist_regexp'):
+            self.state_keys_blacklist_regexp = re.compile('(' + '|'.join(self.get_state_keys_blacklist()) + ')')
+        return self.state_keys_blacklist_regexp
+
+    def construct_python_str(self, node):
+        return self.construct_scalar(node)
+
+    def construct_python_unicode(self, node):
+        return self.construct_scalar(node)
+
+    def construct_python_bytes(self, node):
+        try:
+            value = self.construct_scalar(node).encode('ascii')
+        except UnicodeEncodeError as exc:
+            raise ConstructorError(None, None,
+                    "failed to convert base64 data into ascii: %s" % exc,
+                    node.start_mark)
+        try:
+            if hasattr(base64, 'decodebytes'):
+                return base64.decodebytes(value)
+            else:
+                return base64.decodestring(value)
+        except binascii.Error as exc:
+            raise ConstructorError(None, None,
+                    "failed to decode base64 data: %s" % exc, node.start_mark)
+
+    def construct_python_long(self, node):
+        return self.construct_yaml_int(node)
+
+    def construct_python_complex(self, node):
+       return complex(self.construct_scalar(node))
+
+    def construct_python_tuple(self, node):
+        return tuple(self.construct_sequence(node))
+
+    def find_python_module(self, name, mark, unsafe=False):
+        if not name:
+            raise ConstructorError("while constructing a Python module", mark,
+                    "expected non-empty name appended to the tag", mark)
+        if unsafe:
+            try:
+                __import__(name)
+            except ImportError as exc:
+                raise ConstructorError("while constructing a Python module", mark,
+                        "cannot find module %r (%s)" % (name, exc), mark)
+        if name not in sys.modules:
+            raise ConstructorError("while constructing a Python module", mark,
+                    "module %r is not imported" % name, mark)
+        return sys.modules[name]
+
+    def find_python_name(self, name, mark, unsafe=False):
+        if not name:
+            raise ConstructorError("while constructing a Python object", mark,
+                    "expected non-empty name appended to the tag", mark)
+        if '.' in name:
+            module_name, object_name = name.rsplit('.', 1)
+        else:
+            module_name = 'builtins'
+            object_name = name
+        if unsafe:
+            try:
+                __import__(module_name)
+            except ImportError as exc:
+                raise ConstructorError("while constructing a Python object", mark,
+                        "cannot find module %r (%s)" % (module_name, exc), mark)
+        if module_name not in sys.modules:
+            raise ConstructorError("while constructing a Python object", mark,
+                    "module %r is not imported" % module_name, mark)
+        module = sys.modules[module_name]
+        if not hasattr(module, object_name):
+            raise ConstructorError("while constructing a Python object", mark,
+                    "cannot find %r in the module %r"
+                    % (object_name, module.__name__), mark)
+        return getattr(module, object_name)
+
+    def construct_python_name(self, suffix, node):
+        value = self.construct_scalar(node)
+        if value:
+            raise ConstructorError("while constructing a Python name", node.start_mark,
+                    "expected the empty value, but found %r" % value, node.start_mark)
+        return self.find_python_name(suffix, node.start_mark)
+
+    def construct_python_module(self, suffix, node):
+        value = self.construct_scalar(node)
+        if value:
+            raise ConstructorError("while constructing a Python module", node.start_mark,
+                    "expected the empty value, but found %r" % value, node.start_mark)
+        return self.find_python_module(suffix, node.start_mark)
+
+    def make_python_instance(self, suffix, node,
+            args=None, kwds=None, newobj=False, unsafe=False):
+        if not args:
+            args = []
+        if not kwds:
+            kwds = {}
+        cls = self.find_python_name(suffix, node.start_mark)
+        if not (unsafe or isinstance(cls, type)):
+            raise ConstructorError("while constructing a Python instance", node.start_mark,
+                    "expected a class, but found %r" % type(cls),
+                    node.start_mark)
+        if newobj and isinstance(cls, type):
+            return cls.__new__(cls, *args, **kwds)
+        else:
+            return cls(*args, **kwds)
+
+    def set_python_instance_state(self, instance, state, unsafe=False):
+        if hasattr(instance, '__setstate__'):
+            instance.__setstate__(state)
+        else:
+            slotstate = {}
+            if isinstance(state, tuple) and len(state) == 2:
+                state, slotstate = state
+            if hasattr(instance, '__dict__'):
+                if not unsafe and state:
+                    for key in state.keys():
+                        self.check_state_key(key)
+                instance.__dict__.update(state)
+            elif state:
+                slotstate.update(state)
+            for key, value in slotstate.items():
+                if not unsafe:
+                    self.check_state_key(key)
+                setattr(instance, key, value)
+
+    def construct_python_object(self, suffix, node):
+        # Format:
+        #   !!python/object:module.name { ... state ... }
+        instance = self.make_python_instance(suffix, node, newobj=True)
+        yield instance
+        deep = hasattr(instance, '__setstate__')
+        state = self.construct_mapping(node, deep=deep)
+        self.set_python_instance_state(instance, state)
+
+    def construct_python_object_apply(self, suffix, node, newobj=False):
+        # Format:
+        #   !!python/object/apply       # (or !!python/object/new)
+        #   args: [ ... arguments ... ]
+        #   kwds: { ... keywords ... }
+        #   state: ... state ...
+        #   listitems: [ ... listitems ... ]
+        #   dictitems: { ... dictitems ... }
+        # or short format:
+        #   !!python/object/apply [ ... arguments ... ]
+        # The difference between !!python/object/apply and !!python/object/new
+        # is how an object is created, check make_python_instance for details.
+        if isinstance(node, SequenceNode):
+            args = self.construct_sequence(node, deep=True)
+            kwds = {}
+            state = {}
+            listitems = []
+            dictitems = {}
+        else:
+            value = self.construct_mapping(node, deep=True)
+            args = value.get('args', [])
+            kwds = value.get('kwds', {})
+            state = value.get('state', {})
+            listitems = value.get('listitems', [])
+            dictitems = value.get('dictitems', {})
+        instance = self.make_python_instance(suffix, node, args, kwds, newobj)
+        if state:
+            self.set_python_instance_state(instance, state)
+        if listitems:
+            instance.extend(listitems)
+        if dictitems:
+            for key in dictitems:
+                instance[key] = dictitems[key]
+        return instance
+
+    def construct_python_object_new(self, suffix, node):
+        return self.construct_python_object_apply(suffix, node, newobj=True)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/none',
+    FullConstructor.construct_yaml_null)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/bool',
+    FullConstructor.construct_yaml_bool)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/str',
+    FullConstructor.construct_python_str)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/unicode',
+    FullConstructor.construct_python_unicode)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/bytes',
+    FullConstructor.construct_python_bytes)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/int',
+    FullConstructor.construct_yaml_int)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/long',
+    FullConstructor.construct_python_long)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/float',
+    FullConstructor.construct_yaml_float)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/complex',
+    FullConstructor.construct_python_complex)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/list',
+    FullConstructor.construct_yaml_seq)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/tuple',
+    FullConstructor.construct_python_tuple)
+
+FullConstructor.add_constructor(
+    'tag:yaml.org,2002:python/dict',
+    FullConstructor.construct_yaml_map)
+
+FullConstructor.add_multi_constructor(
+    'tag:yaml.org,2002:python/name:',
+    FullConstructor.construct_python_name)
+
+FullConstructor.add_multi_constructor(
+    'tag:yaml.org,2002:python/module:',
+    FullConstructor.construct_python_module)
+
+FullConstructor.add_multi_constructor(
+    'tag:yaml.org,2002:python/object:',
+    FullConstructor.construct_python_object)
+
+FullConstructor.add_multi_constructor(
+    'tag:yaml.org,2002:python/object/new:',
+    FullConstructor.construct_python_object_new)
+
+class UnsafeConstructor(FullConstructor):
+
+    def find_python_module(self, name, mark):
+        return super(UnsafeConstructor, self).find_python_module(name, mark, unsafe=True)
+
+    def find_python_name(self, name, mark):
+        return super(UnsafeConstructor, self).find_python_name(name, mark, unsafe=True)
+
+    def make_python_instance(self, suffix, node, args=None, kwds=None, newobj=False):
+        return super(UnsafeConstructor, self).make_python_instance(
+            suffix, node, args, kwds, newobj, unsafe=True)
+
+    def set_python_instance_state(self, instance, state):
+        return super(UnsafeConstructor, self).set_python_instance_state(
+            instance, state, unsafe=True)
+
+UnsafeConstructor.add_multi_constructor(
+    'tag:yaml.org,2002:python/object/apply:',
+    UnsafeConstructor.construct_python_object_apply)
+
+# Constructor is same as UnsafeConstructor. Need to leave this in place in case
+# people have extended it directly.
+class Constructor(UnsafeConstructor):
+    pass
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/cyaml.py b/python3-vckonline/lib/python3.8/site-packages/yaml/cyaml.py
new file mode 100644
index 0000000..1e606c7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/cyaml.py
@@ -0,0 +1,101 @@
+
+__all__ = [
+    'CBaseLoader', 'CSafeLoader', 'CFullLoader', 'CUnsafeLoader', 'CLoader',
+    'CBaseDumper', 'CSafeDumper', 'CDumper'
+]
+
+from _yaml import CParser, CEmitter
+
+from .constructor import *
+
+from .serializer import *
+from .representer import *
+
+from .resolver import *
+
+class CBaseLoader(CParser, BaseConstructor, BaseResolver):
+
+    def __init__(self, stream):
+        CParser.__init__(self, stream)
+        BaseConstructor.__init__(self)
+        BaseResolver.__init__(self)
+
+class CSafeLoader(CParser, SafeConstructor, Resolver):
+
+    def __init__(self, stream):
+        CParser.__init__(self, stream)
+        SafeConstructor.__init__(self)
+        Resolver.__init__(self)
+
+class CFullLoader(CParser, FullConstructor, Resolver):
+
+    def __init__(self, stream):
+        CParser.__init__(self, stream)
+        FullConstructor.__init__(self)
+        Resolver.__init__(self)
+
+class CUnsafeLoader(CParser, UnsafeConstructor, Resolver):
+
+    def __init__(self, stream):
+        CParser.__init__(self, stream)
+        UnsafeConstructor.__init__(self)
+        Resolver.__init__(self)
+
+class CLoader(CParser, Constructor, Resolver):
+
+    def __init__(self, stream):
+        CParser.__init__(self, stream)
+        Constructor.__init__(self)
+        Resolver.__init__(self)
+
+class CBaseDumper(CEmitter, BaseRepresenter, BaseResolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=False,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None, sort_keys=True):
+        CEmitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width, encoding=encoding,
+                allow_unicode=allow_unicode, line_break=line_break,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        Representer.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style, sort_keys=sort_keys)
+        Resolver.__init__(self)
+
+class CSafeDumper(CEmitter, SafeRepresenter, Resolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=False,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None, sort_keys=True):
+        CEmitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width, encoding=encoding,
+                allow_unicode=allow_unicode, line_break=line_break,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        SafeRepresenter.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style, sort_keys=sort_keys)
+        Resolver.__init__(self)
+
+class CDumper(CEmitter, Serializer, Representer, Resolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=False,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None, sort_keys=True):
+        CEmitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width, encoding=encoding,
+                allow_unicode=allow_unicode, line_break=line_break,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        Representer.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style, sort_keys=sort_keys)
+        Resolver.__init__(self)
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/dumper.py b/python3-vckonline/lib/python3.8/site-packages/yaml/dumper.py
new file mode 100644
index 0000000..6aadba5
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/dumper.py
@@ -0,0 +1,62 @@
+
+__all__ = ['BaseDumper', 'SafeDumper', 'Dumper']
+
+from .emitter import *
+from .serializer import *
+from .representer import *
+from .resolver import *
+
+class BaseDumper(Emitter, Serializer, BaseRepresenter, BaseResolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=False,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None, sort_keys=True):
+        Emitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width,
+                allow_unicode=allow_unicode, line_break=line_break)
+        Serializer.__init__(self, encoding=encoding,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        Representer.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style, sort_keys=sort_keys)
+        Resolver.__init__(self)
+
+class SafeDumper(Emitter, Serializer, SafeRepresenter, Resolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=False,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None, sort_keys=True):
+        Emitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width,
+                allow_unicode=allow_unicode, line_break=line_break)
+        Serializer.__init__(self, encoding=encoding,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        SafeRepresenter.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style, sort_keys=sort_keys)
+        Resolver.__init__(self)
+
+class Dumper(Emitter, Serializer, Representer, Resolver):
+
+    def __init__(self, stream,
+            default_style=None, default_flow_style=False,
+            canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None,
+            encoding=None, explicit_start=None, explicit_end=None,
+            version=None, tags=None, sort_keys=True):
+        Emitter.__init__(self, stream, canonical=canonical,
+                indent=indent, width=width,
+                allow_unicode=allow_unicode, line_break=line_break)
+        Serializer.__init__(self, encoding=encoding,
+                explicit_start=explicit_start, explicit_end=explicit_end,
+                version=version, tags=tags)
+        Representer.__init__(self, default_style=default_style,
+                default_flow_style=default_flow_style, sort_keys=sort_keys)
+        Resolver.__init__(self)
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/emitter.py b/python3-vckonline/lib/python3.8/site-packages/yaml/emitter.py
new file mode 100644
index 0000000..a664d01
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/emitter.py
@@ -0,0 +1,1137 @@
+
+# Emitter expects events obeying the following grammar:
+# stream ::= STREAM-START document* STREAM-END
+# document ::= DOCUMENT-START node DOCUMENT-END
+# node ::= SCALAR | sequence | mapping
+# sequence ::= SEQUENCE-START node* SEQUENCE-END
+# mapping ::= MAPPING-START (node node)* MAPPING-END
+
+__all__ = ['Emitter', 'EmitterError']
+
+from .error import YAMLError
+from .events import *
+
+class EmitterError(YAMLError):
+    pass
+
+class ScalarAnalysis:
+    def __init__(self, scalar, empty, multiline,
+            allow_flow_plain, allow_block_plain,
+            allow_single_quoted, allow_double_quoted,
+            allow_block):
+        self.scalar = scalar
+        self.empty = empty
+        self.multiline = multiline
+        self.allow_flow_plain = allow_flow_plain
+        self.allow_block_plain = allow_block_plain
+        self.allow_single_quoted = allow_single_quoted
+        self.allow_double_quoted = allow_double_quoted
+        self.allow_block = allow_block
+
+class Emitter:
+
+    DEFAULT_TAG_PREFIXES = {
+        '!' : '!',
+        'tag:yaml.org,2002:' : '!!',
+    }
+
+    def __init__(self, stream, canonical=None, indent=None, width=None,
+            allow_unicode=None, line_break=None):
+
+        # The stream should have the methods `write` and possibly `flush`.
+        self.stream = stream
+
+        # Encoding can be overridden by STREAM-START.
+        self.encoding = None
+
+        # Emitter is a state machine with a stack of states to handle nested
+        # structures.
+        self.states = []
+        self.state = self.expect_stream_start
+
+        # Current event and the event queue.
+        self.events = []
+        self.event = None
+
+        # The current indentation level and the stack of previous indents.
+        self.indents = []
+        self.indent = None
+
+        # Flow level.
+        self.flow_level = 0
+
+        # Contexts.
+        self.root_context = False
+        self.sequence_context = False
+        self.mapping_context = False
+        self.simple_key_context = False
+
+        # Characteristics of the last emitted character:
+        #  - current position.
+        #  - is it a whitespace?
+        #  - is it an indention character
+        #    (indentation space, '-', '?', or ':')?
+        self.line = 0
+        self.column = 0
+        self.whitespace = True
+        self.indention = True
+
+        # Whether the document requires an explicit document indicator
+        self.open_ended = False
+
+        # Formatting details.
+        self.canonical = canonical
+        self.allow_unicode = allow_unicode
+        self.best_indent = 2
+        if indent and 1 < indent < 10:
+            self.best_indent = indent
+        self.best_width = 80
+        if width and width > self.best_indent*2:
+            self.best_width = width
+        self.best_line_break = '\n'
+        if line_break in ['\r', '\n', '\r\n']:
+            self.best_line_break = line_break
+
+        # Tag prefixes.
+        self.tag_prefixes = None
+
+        # Prepared anchor and tag.
+        self.prepared_anchor = None
+        self.prepared_tag = None
+
+        # Scalar analysis and style.
+        self.analysis = None
+        self.style = None
+
+    def dispose(self):
+        # Reset the state attributes (to clear self-references)
+        self.states = []
+        self.state = None
+
+    def emit(self, event):
+        self.events.append(event)
+        while not self.need_more_events():
+            self.event = self.events.pop(0)
+            self.state()
+            self.event = None
+
+    # In some cases, we wait for a few next events before emitting.
+
+    def need_more_events(self):
+        if not self.events:
+            return True
+        event = self.events[0]
+        if isinstance(event, DocumentStartEvent):
+            return self.need_events(1)
+        elif isinstance(event, SequenceStartEvent):
+            return self.need_events(2)
+        elif isinstance(event, MappingStartEvent):
+            return self.need_events(3)
+        else:
+            return False
+
+    def need_events(self, count):
+        level = 0
+        for event in self.events[1:]:
+            if isinstance(event, (DocumentStartEvent, CollectionStartEvent)):
+                level += 1
+            elif isinstance(event, (DocumentEndEvent, CollectionEndEvent)):
+                level -= 1
+            elif isinstance(event, StreamEndEvent):
+                level = -1
+            if level < 0:
+                return False
+        return (len(self.events) < count+1)
+
+    def increase_indent(self, flow=False, indentless=False):
+        self.indents.append(self.indent)
+        if self.indent is None:
+            if flow:
+                self.indent = self.best_indent
+            else:
+                self.indent = 0
+        elif not indentless:
+            self.indent += self.best_indent
+
+    # States.
+
+    # Stream handlers.
+
+    def expect_stream_start(self):
+        if isinstance(self.event, StreamStartEvent):
+            if self.event.encoding and not hasattr(self.stream, 'encoding'):
+                self.encoding = self.event.encoding
+            self.write_stream_start()
+            self.state = self.expect_first_document_start
+        else:
+            raise EmitterError("expected StreamStartEvent, but got %s"
+                    % self.event)
+
+    def expect_nothing(self):
+        raise EmitterError("expected nothing, but got %s" % self.event)
+
+    # Document handlers.
+
+    def expect_first_document_start(self):
+        return self.expect_document_start(first=True)
+
+    def expect_document_start(self, first=False):
+        if isinstance(self.event, DocumentStartEvent):
+            if (self.event.version or self.event.tags) and self.open_ended:
+                self.write_indicator('...', True)
+                self.write_indent()
+            if self.event.version:
+                version_text = self.prepare_version(self.event.version)
+                self.write_version_directive(version_text)
+            self.tag_prefixes = self.DEFAULT_TAG_PREFIXES.copy()
+            if self.event.tags:
+                handles = sorted(self.event.tags.keys())
+                for handle in handles:
+                    prefix = self.event.tags[handle]
+                    self.tag_prefixes[prefix] = handle
+                    handle_text = self.prepare_tag_handle(handle)
+                    prefix_text = self.prepare_tag_prefix(prefix)
+                    self.write_tag_directive(handle_text, prefix_text)
+            implicit = (first and not self.event.explicit and not self.canonical
+                    and not self.event.version and not self.event.tags
+                    and not self.check_empty_document())
+            if not implicit:
+                self.write_indent()
+                self.write_indicator('---', True)
+                if self.canonical:
+                    self.write_indent()
+            self.state = self.expect_document_root
+        elif isinstance(self.event, StreamEndEvent):
+            if self.open_ended:
+                self.write_indicator('...', True)
+                self.write_indent()
+            self.write_stream_end()
+            self.state = self.expect_nothing
+        else:
+            raise EmitterError("expected DocumentStartEvent, but got %s"
+                    % self.event)
+
+    def expect_document_end(self):
+        if isinstance(self.event, DocumentEndEvent):
+            self.write_indent()
+            if self.event.explicit:
+                self.write_indicator('...', True)
+                self.write_indent()
+            self.flush_stream()
+            self.state = self.expect_document_start
+        else:
+            raise EmitterError("expected DocumentEndEvent, but got %s"
+                    % self.event)
+
+    def expect_document_root(self):
+        self.states.append(self.expect_document_end)
+        self.expect_node(root=True)
+
+    # Node handlers.
+
+    def expect_node(self, root=False, sequence=False, mapping=False,
+            simple_key=False):
+        self.root_context = root
+        self.sequence_context = sequence
+        self.mapping_context = mapping
+        self.simple_key_context = simple_key
+        if isinstance(self.event, AliasEvent):
+            self.expect_alias()
+        elif isinstance(self.event, (ScalarEvent, CollectionStartEvent)):
+            self.process_anchor('&')
+            self.process_tag()
+            if isinstance(self.event, ScalarEvent):
+                self.expect_scalar()
+            elif isinstance(self.event, SequenceStartEvent):
+                if self.flow_level or self.canonical or self.event.flow_style   \
+                        or self.check_empty_sequence():
+                    self.expect_flow_sequence()
+                else:
+                    self.expect_block_sequence()
+            elif isinstance(self.event, MappingStartEvent):
+                if self.flow_level or self.canonical or self.event.flow_style   \
+                        or self.check_empty_mapping():
+                    self.expect_flow_mapping()
+                else:
+                    self.expect_block_mapping()
+        else:
+            raise EmitterError("expected NodeEvent, but got %s" % self.event)
+
+    def expect_alias(self):
+        if self.event.anchor is None:
+            raise EmitterError("anchor is not specified for alias")
+        self.process_anchor('*')
+        self.state = self.states.pop()
+
+    def expect_scalar(self):
+        self.increase_indent(flow=True)
+        self.process_scalar()
+        self.indent = self.indents.pop()
+        self.state = self.states.pop()
+
+    # Flow sequence handlers.
+
+    def expect_flow_sequence(self):
+        self.write_indicator('[', True, whitespace=True)
+        self.flow_level += 1
+        self.increase_indent(flow=True)
+        self.state = self.expect_first_flow_sequence_item
+
+    def expect_first_flow_sequence_item(self):
+        if isinstance(self.event, SequenceEndEvent):
+            self.indent = self.indents.pop()
+            self.flow_level -= 1
+            self.write_indicator(']', False)
+            self.state = self.states.pop()
+        else:
+            if self.canonical or self.column > self.best_width:
+                self.write_indent()
+            self.states.append(self.expect_flow_sequence_item)
+            self.expect_node(sequence=True)
+
+    def expect_flow_sequence_item(self):
+        if isinstance(self.event, SequenceEndEvent):
+            self.indent = self.indents.pop()
+            self.flow_level -= 1
+            if self.canonical:
+                self.write_indicator(',', False)
+                self.write_indent()
+            self.write_indicator(']', False)
+            self.state = self.states.pop()
+        else:
+            self.write_indicator(',', False)
+            if self.canonical or self.column > self.best_width:
+                self.write_indent()
+            self.states.append(self.expect_flow_sequence_item)
+            self.expect_node(sequence=True)
+
+    # Flow mapping handlers.
+
+    def expect_flow_mapping(self):
+        self.write_indicator('{', True, whitespace=True)
+        self.flow_level += 1
+        self.increase_indent(flow=True)
+        self.state = self.expect_first_flow_mapping_key
+
+    def expect_first_flow_mapping_key(self):
+        if isinstance(self.event, MappingEndEvent):
+            self.indent = self.indents.pop()
+            self.flow_level -= 1
+            self.write_indicator('}', False)
+            self.state = self.states.pop()
+        else:
+            if self.canonical or self.column > self.best_width:
+                self.write_indent()
+            if not self.canonical and self.check_simple_key():
+                self.states.append(self.expect_flow_mapping_simple_value)
+                self.expect_node(mapping=True, simple_key=True)
+            else:
+                self.write_indicator('?', True)
+                self.states.append(self.expect_flow_mapping_value)
+                self.expect_node(mapping=True)
+
+    def expect_flow_mapping_key(self):
+        if isinstance(self.event, MappingEndEvent):
+            self.indent = self.indents.pop()
+            self.flow_level -= 1
+            if self.canonical:
+                self.write_indicator(',', False)
+                self.write_indent()
+            self.write_indicator('}', False)
+            self.state = self.states.pop()
+        else:
+            self.write_indicator(',', False)
+            if self.canonical or self.column > self.best_width:
+                self.write_indent()
+            if not self.canonical and self.check_simple_key():
+                self.states.append(self.expect_flow_mapping_simple_value)
+                self.expect_node(mapping=True, simple_key=True)
+            else:
+                self.write_indicator('?', True)
+                self.states.append(self.expect_flow_mapping_value)
+                self.expect_node(mapping=True)
+
+    def expect_flow_mapping_simple_value(self):
+        self.write_indicator(':', False)
+        self.states.append(self.expect_flow_mapping_key)
+        self.expect_node(mapping=True)
+
+    def expect_flow_mapping_value(self):
+        if self.canonical or self.column > self.best_width:
+            self.write_indent()
+        self.write_indicator(':', True)
+        self.states.append(self.expect_flow_mapping_key)
+        self.expect_node(mapping=True)
+
+    # Block sequence handlers.
+
+    def expect_block_sequence(self):
+        indentless = (self.mapping_context and not self.indention)
+        self.increase_indent(flow=False, indentless=indentless)
+        self.state = self.expect_first_block_sequence_item
+
+    def expect_first_block_sequence_item(self):
+        return self.expect_block_sequence_item(first=True)
+
+    def expect_block_sequence_item(self, first=False):
+        if not first and isinstance(self.event, SequenceEndEvent):
+            self.indent = self.indents.pop()
+            self.state = self.states.pop()
+        else:
+            self.write_indent()
+            self.write_indicator('-', True, indention=True)
+            self.states.append(self.expect_block_sequence_item)
+            self.expect_node(sequence=True)
+
+    # Block mapping handlers.
+
+    def expect_block_mapping(self):
+        self.increase_indent(flow=False)
+        self.state = self.expect_first_block_mapping_key
+
+    def expect_first_block_mapping_key(self):
+        return self.expect_block_mapping_key(first=True)
+
+    def expect_block_mapping_key(self, first=False):
+        if not first and isinstance(self.event, MappingEndEvent):
+            self.indent = self.indents.pop()
+            self.state = self.states.pop()
+        else:
+            self.write_indent()
+            if self.check_simple_key():
+                self.states.append(self.expect_block_mapping_simple_value)
+                self.expect_node(mapping=True, simple_key=True)
+            else:
+                self.write_indicator('?', True, indention=True)
+                self.states.append(self.expect_block_mapping_value)
+                self.expect_node(mapping=True)
+
+    def expect_block_mapping_simple_value(self):
+        self.write_indicator(':', False)
+        self.states.append(self.expect_block_mapping_key)
+        self.expect_node(mapping=True)
+
+    def expect_block_mapping_value(self):
+        self.write_indent()
+        self.write_indicator(':', True, indention=True)
+        self.states.append(self.expect_block_mapping_key)
+        self.expect_node(mapping=True)
+
+    # Checkers.
+
+    def check_empty_sequence(self):
+        return (isinstance(self.event, SequenceStartEvent) and self.events
+                and isinstance(self.events[0], SequenceEndEvent))
+
+    def check_empty_mapping(self):
+        return (isinstance(self.event, MappingStartEvent) and self.events
+                and isinstance(self.events[0], MappingEndEvent))
+
+    def check_empty_document(self):
+        if not isinstance(self.event, DocumentStartEvent) or not self.events:
+            return False
+        event = self.events[0]
+        return (isinstance(event, ScalarEvent) and event.anchor is None
+                and event.tag is None and event.implicit and event.value == '')
+
+    def check_simple_key(self):
+        length = 0
+        if isinstance(self.event, NodeEvent) and self.event.anchor is not None:
+            if self.prepared_anchor is None:
+                self.prepared_anchor = self.prepare_anchor(self.event.anchor)
+            length += len(self.prepared_anchor)
+        if isinstance(self.event, (ScalarEvent, CollectionStartEvent))  \
+                and self.event.tag is not None:
+            if self.prepared_tag is None:
+                self.prepared_tag = self.prepare_tag(self.event.tag)
+            length += len(self.prepared_tag)
+        if isinstance(self.event, ScalarEvent):
+            if self.analysis is None:
+                self.analysis = self.analyze_scalar(self.event.value)
+            length += len(self.analysis.scalar)
+        return (length < 128 and (isinstance(self.event, AliasEvent)
+            or (isinstance(self.event, ScalarEvent)
+                    and not self.analysis.empty and not self.analysis.multiline)
+            or self.check_empty_sequence() or self.check_empty_mapping()))
+
+    # Anchor, Tag, and Scalar processors.
+
+    def process_anchor(self, indicator):
+        if self.event.anchor is None:
+            self.prepared_anchor = None
+            return
+        if self.prepared_anchor is None:
+            self.prepared_anchor = self.prepare_anchor(self.event.anchor)
+        if self.prepared_anchor:
+            self.write_indicator(indicator+self.prepared_anchor, True)
+        self.prepared_anchor = None
+
+    def process_tag(self):
+        tag = self.event.tag
+        if isinstance(self.event, ScalarEvent):
+            if self.style is None:
+                self.style = self.choose_scalar_style()
+            if ((not self.canonical or tag is None) and
+                ((self.style == '' and self.event.implicit[0])
+                        or (self.style != '' and self.event.implicit[1]))):
+                self.prepared_tag = None
+                return
+            if self.event.implicit[0] and tag is None:
+                tag = '!'
+                self.prepared_tag = None
+        else:
+            if (not self.canonical or tag is None) and self.event.implicit:
+                self.prepared_tag = None
+                return
+        if tag is None:
+            raise EmitterError("tag is not specified")
+        if self.prepared_tag is None:
+            self.prepared_tag = self.prepare_tag(tag)
+        if self.prepared_tag:
+            self.write_indicator(self.prepared_tag, True)
+        self.prepared_tag = None
+
+    def choose_scalar_style(self):
+        if self.analysis is None:
+            self.analysis = self.analyze_scalar(self.event.value)
+        if self.event.style == '"' or self.canonical:
+            return '"'
+        if not self.event.style and self.event.implicit[0]:
+            if (not (self.simple_key_context and
+                    (self.analysis.empty or self.analysis.multiline))
+                and (self.flow_level and self.analysis.allow_flow_plain
+                    or (not self.flow_level and self.analysis.allow_block_plain))):
+                return ''
+        if self.event.style and self.event.style in '|>':
+            if (not self.flow_level and not self.simple_key_context
+                    and self.analysis.allow_block):
+                return self.event.style
+        if not self.event.style or self.event.style == '\'':
+            if (self.analysis.allow_single_quoted and
+                    not (self.simple_key_context and self.analysis.multiline)):
+                return '\''
+        return '"'
+
+    def process_scalar(self):
+        if self.analysis is None:
+            self.analysis = self.analyze_scalar(self.event.value)
+        if self.style is None:
+            self.style = self.choose_scalar_style()
+        split = (not self.simple_key_context)
+        #if self.analysis.multiline and split    \
+        #        and (not self.style or self.style in '\'\"'):
+        #    self.write_indent()
+        if self.style == '"':
+            self.write_double_quoted(self.analysis.scalar, split)
+        elif self.style == '\'':
+            self.write_single_quoted(self.analysis.scalar, split)
+        elif self.style == '>':
+            self.write_folded(self.analysis.scalar)
+        elif self.style == '|':
+            self.write_literal(self.analysis.scalar)
+        else:
+            self.write_plain(self.analysis.scalar, split)
+        self.analysis = None
+        self.style = None
+
+    # Analyzers.
+
+    def prepare_version(self, version):
+        major, minor = version
+        if major != 1:
+            raise EmitterError("unsupported YAML version: %d.%d" % (major, minor))
+        return '%d.%d' % (major, minor)
+
+    def prepare_tag_handle(self, handle):
+        if not handle:
+            raise EmitterError("tag handle must not be empty")
+        if handle[0] != '!' or handle[-1] != '!':
+            raise EmitterError("tag handle must start and end with '!': %r" % handle)
+        for ch in handle[1:-1]:
+            if not ('0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'    \
+                    or ch in '-_'):
+                raise EmitterError("invalid character %r in the tag handle: %r"
+                        % (ch, handle))
+        return handle
+
+    def prepare_tag_prefix(self, prefix):
+        if not prefix:
+            raise EmitterError("tag prefix must not be empty")
+        chunks = []
+        start = end = 0
+        if prefix[0] == '!':
+            end = 1
+        while end < len(prefix):
+            ch = prefix[end]
+            if '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z' \
+                    or ch in '-;/?!:@&=+$,_.~*\'()[]':
+                end += 1
+            else:
+                if start < end:
+                    chunks.append(prefix[start:end])
+                start = end = end+1
+                data = ch.encode('utf-8')
+                for ch in data:
+                    chunks.append('%%%02X' % ord(ch))
+        if start < end:
+            chunks.append(prefix[start:end])
+        return ''.join(chunks)
+
+    def prepare_tag(self, tag):
+        if not tag:
+            raise EmitterError("tag must not be empty")
+        if tag == '!':
+            return tag
+        handle = None
+        suffix = tag
+        prefixes = sorted(self.tag_prefixes.keys())
+        for prefix in prefixes:
+            if tag.startswith(prefix)   \
+                    and (prefix == '!' or len(prefix) < len(tag)):
+                handle = self.tag_prefixes[prefix]
+                suffix = tag[len(prefix):]
+        chunks = []
+        start = end = 0
+        while end < len(suffix):
+            ch = suffix[end]
+            if '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z' \
+                    or ch in '-;/?:@&=+$,_.~*\'()[]'   \
+                    or (ch == '!' and handle != '!'):
+                end += 1
+            else:
+                if start < end:
+                    chunks.append(suffix[start:end])
+                start = end = end+1
+                data = ch.encode('utf-8')
+                for ch in data:
+                    chunks.append('%%%02X' % ch)
+        if start < end:
+            chunks.append(suffix[start:end])
+        suffix_text = ''.join(chunks)
+        if handle:
+            return '%s%s' % (handle, suffix_text)
+        else:
+            return '!<%s>' % suffix_text
+
+    def prepare_anchor(self, anchor):
+        if not anchor:
+            raise EmitterError("anchor must not be empty")
+        for ch in anchor:
+            if not ('0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'    \
+                    or ch in '-_'):
+                raise EmitterError("invalid character %r in the anchor: %r"
+                        % (ch, anchor))
+        return anchor
+
+    def analyze_scalar(self, scalar):
+
+        # Empty scalar is a special case.
+        if not scalar:
+            return ScalarAnalysis(scalar=scalar, empty=True, multiline=False,
+                    allow_flow_plain=False, allow_block_plain=True,
+                    allow_single_quoted=True, allow_double_quoted=True,
+                    allow_block=False)
+
+        # Indicators and special characters.
+        block_indicators = False
+        flow_indicators = False
+        line_breaks = False
+        special_characters = False
+
+        # Important whitespace combinations.
+        leading_space = False
+        leading_break = False
+        trailing_space = False
+        trailing_break = False
+        break_space = False
+        space_break = False
+
+        # Check document indicators.
+        if scalar.startswith('---') or scalar.startswith('...'):
+            block_indicators = True
+            flow_indicators = True
+
+        # First character or preceded by a whitespace.
+        preceded_by_whitespace = True
+
+        # Last character or followed by a whitespace.
+        followed_by_whitespace = (len(scalar) == 1 or
+                scalar[1] in '\0 \t\r\n\x85\u2028\u2029')
+
+        # The previous character is a space.
+        previous_space = False
+
+        # The previous character is a break.
+        previous_break = False
+
+        index = 0
+        while index < len(scalar):
+            ch = scalar[index]
+
+            # Check for indicators.
+            if index == 0:
+                # Leading indicators are special characters.
+                if ch in '#,[]{}&*!|>\'\"%@`':
+                    flow_indicators = True
+                    block_indicators = True
+                if ch in '?:':
+                    flow_indicators = True
+                    if followed_by_whitespace:
+                        block_indicators = True
+                if ch == '-' and followed_by_whitespace:
+                    flow_indicators = True
+                    block_indicators = True
+            else:
+                # Some indicators cannot appear within a scalar as well.
+                if ch in ',?[]{}':
+                    flow_indicators = True
+                if ch == ':':
+                    flow_indicators = True
+                    if followed_by_whitespace:
+                        block_indicators = True
+                if ch == '#' and preceded_by_whitespace:
+                    flow_indicators = True
+                    block_indicators = True
+
+            # Check for line breaks, special, and unicode characters.
+            if ch in '\n\x85\u2028\u2029':
+                line_breaks = True
+            if not (ch == '\n' or '\x20' <= ch <= '\x7E'):
+                if (ch == '\x85' or '\xA0' <= ch <= '\uD7FF'
+                        or '\uE000' <= ch <= '\uFFFD'
+                        or '\U00010000' <= ch < '\U0010ffff') and ch != '\uFEFF':
+                    unicode_characters = True
+                    if not self.allow_unicode:
+                        special_characters = True
+                else:
+                    special_characters = True
+
+            # Detect important whitespace combinations.
+            if ch == ' ':
+                if index == 0:
+                    leading_space = True
+                if index == len(scalar)-1:
+                    trailing_space = True
+                if previous_break:
+                    break_space = True
+                previous_space = True
+                previous_break = False
+            elif ch in '\n\x85\u2028\u2029':
+                if index == 0:
+                    leading_break = True
+                if index == len(scalar)-1:
+                    trailing_break = True
+                if previous_space:
+                    space_break = True
+                previous_space = False
+                previous_break = True
+            else:
+                previous_space = False
+                previous_break = False
+
+            # Prepare for the next character.
+            index += 1
+            preceded_by_whitespace = (ch in '\0 \t\r\n\x85\u2028\u2029')
+            followed_by_whitespace = (index+1 >= len(scalar) or
+                    scalar[index+1] in '\0 \t\r\n\x85\u2028\u2029')
+
+        # Let's decide what styles are allowed.
+        allow_flow_plain = True
+        allow_block_plain = True
+        allow_single_quoted = True
+        allow_double_quoted = True
+        allow_block = True
+
+        # Leading and trailing whitespaces are bad for plain scalars.
+        if (leading_space or leading_break
+                or trailing_space or trailing_break):
+            allow_flow_plain = allow_block_plain = False
+
+        # We do not permit trailing spaces for block scalars.
+        if trailing_space:
+            allow_block = False
+
+        # Spaces at the beginning of a new line are only acceptable for block
+        # scalars.
+        if break_space:
+            allow_flow_plain = allow_block_plain = allow_single_quoted = False
+
+        # Spaces followed by breaks, as well as special character are only
+        # allowed for double quoted scalars.
+        if space_break or special_characters:
+            allow_flow_plain = allow_block_plain =  \
+            allow_single_quoted = allow_block = False
+
+        # Although the plain scalar writer supports breaks, we never emit
+        # multiline plain scalars.
+        if line_breaks:
+            allow_flow_plain = allow_block_plain = False
+
+        # Flow indicators are forbidden for flow plain scalars.
+        if flow_indicators:
+            allow_flow_plain = False
+
+        # Block indicators are forbidden for block plain scalars.
+        if block_indicators:
+            allow_block_plain = False
+
+        return ScalarAnalysis(scalar=scalar,
+                empty=False, multiline=line_breaks,
+                allow_flow_plain=allow_flow_plain,
+                allow_block_plain=allow_block_plain,
+                allow_single_quoted=allow_single_quoted,
+                allow_double_quoted=allow_double_quoted,
+                allow_block=allow_block)
+
+    # Writers.
+
+    def flush_stream(self):
+        if hasattr(self.stream, 'flush'):
+            self.stream.flush()
+
+    def write_stream_start(self):
+        # Write BOM if needed.
+        if self.encoding and self.encoding.startswith('utf-16'):
+            self.stream.write('\uFEFF'.encode(self.encoding))
+
+    def write_stream_end(self):
+        self.flush_stream()
+
+    def write_indicator(self, indicator, need_whitespace,
+            whitespace=False, indention=False):
+        if self.whitespace or not need_whitespace:
+            data = indicator
+        else:
+            data = ' '+indicator
+        self.whitespace = whitespace
+        self.indention = self.indention and indention
+        self.column += len(data)
+        self.open_ended = False
+        if self.encoding:
+            data = data.encode(self.encoding)
+        self.stream.write(data)
+
+    def write_indent(self):
+        indent = self.indent or 0
+        if not self.indention or self.column > indent   \
+                or (self.column == indent and not self.whitespace):
+            self.write_line_break()
+        if self.column < indent:
+            self.whitespace = True
+            data = ' '*(indent-self.column)
+            self.column = indent
+            if self.encoding:
+                data = data.encode(self.encoding)
+            self.stream.write(data)
+
+    def write_line_break(self, data=None):
+        if data is None:
+            data = self.best_line_break
+        self.whitespace = True
+        self.indention = True
+        self.line += 1
+        self.column = 0
+        if self.encoding:
+            data = data.encode(self.encoding)
+        self.stream.write(data)
+
+    def write_version_directive(self, version_text):
+        data = '%%YAML %s' % version_text
+        if self.encoding:
+            data = data.encode(self.encoding)
+        self.stream.write(data)
+        self.write_line_break()
+
+    def write_tag_directive(self, handle_text, prefix_text):
+        data = '%%TAG %s %s' % (handle_text, prefix_text)
+        if self.encoding:
+            data = data.encode(self.encoding)
+        self.stream.write(data)
+        self.write_line_break()
+
+    # Scalar streams.
+
+    def write_single_quoted(self, text, split=True):
+        self.write_indicator('\'', True)
+        spaces = False
+        breaks = False
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if spaces:
+                if ch is None or ch != ' ':
+                    if start+1 == end and self.column > self.best_width and split   \
+                            and start != 0 and end != len(text):
+                        self.write_indent()
+                    else:
+                        data = text[start:end]
+                        self.column += len(data)
+                        if self.encoding:
+                            data = data.encode(self.encoding)
+                        self.stream.write(data)
+                    start = end
+            elif breaks:
+                if ch is None or ch not in '\n\x85\u2028\u2029':
+                    if text[start] == '\n':
+                        self.write_line_break()
+                    for br in text[start:end]:
+                        if br == '\n':
+                            self.write_line_break()
+                        else:
+                            self.write_line_break(br)
+                    self.write_indent()
+                    start = end
+            else:
+                if ch is None or ch in ' \n\x85\u2028\u2029' or ch == '\'':
+                    if start < end:
+                        data = text[start:end]
+                        self.column += len(data)
+                        if self.encoding:
+                            data = data.encode(self.encoding)
+                        self.stream.write(data)
+                        start = end
+            if ch == '\'':
+                data = '\'\''
+                self.column += 2
+                if self.encoding:
+                    data = data.encode(self.encoding)
+                self.stream.write(data)
+                start = end + 1
+            if ch is not None:
+                spaces = (ch == ' ')
+                breaks = (ch in '\n\x85\u2028\u2029')
+            end += 1
+        self.write_indicator('\'', False)
+
+    ESCAPE_REPLACEMENTS = {
+        '\0':       '0',
+        '\x07':     'a',
+        '\x08':     'b',
+        '\x09':     't',
+        '\x0A':     'n',
+        '\x0B':     'v',
+        '\x0C':     'f',
+        '\x0D':     'r',
+        '\x1B':     'e',
+        '\"':       '\"',
+        '\\':       '\\',
+        '\x85':     'N',
+        '\xA0':     '_',
+        '\u2028':   'L',
+        '\u2029':   'P',
+    }
+
+    def write_double_quoted(self, text, split=True):
+        self.write_indicator('"', True)
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if ch is None or ch in '"\\\x85\u2028\u2029\uFEFF' \
+                    or not ('\x20' <= ch <= '\x7E'
+                        or (self.allow_unicode
+                            and ('\xA0' <= ch <= '\uD7FF'
+                                or '\uE000' <= ch <= '\uFFFD'))):
+                if start < end:
+                    data = text[start:end]
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+                    start = end
+                if ch is not None:
+                    if ch in self.ESCAPE_REPLACEMENTS:
+                        data = '\\'+self.ESCAPE_REPLACEMENTS[ch]
+                    elif ch <= '\xFF':
+                        data = '\\x%02X' % ord(ch)
+                    elif ch <= '\uFFFF':
+                        data = '\\u%04X' % ord(ch)
+                    else:
+                        data = '\\U%08X' % ord(ch)
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+                    start = end+1
+            if 0 < end < len(text)-1 and (ch == ' ' or start >= end)    \
+                    and self.column+(end-start) > self.best_width and split:
+                data = text[start:end]+'\\'
+                if start < end:
+                    start = end
+                self.column += len(data)
+                if self.encoding:
+                    data = data.encode(self.encoding)
+                self.stream.write(data)
+                self.write_indent()
+                self.whitespace = False
+                self.indention = False
+                if text[start] == ' ':
+                    data = '\\'
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+            end += 1
+        self.write_indicator('"', False)
+
+    def determine_block_hints(self, text):
+        hints = ''
+        if text:
+            if text[0] in ' \n\x85\u2028\u2029':
+                hints += str(self.best_indent)
+            if text[-1] not in '\n\x85\u2028\u2029':
+                hints += '-'
+            elif len(text) == 1 or text[-2] in '\n\x85\u2028\u2029':
+                hints += '+'
+        return hints
+
+    def write_folded(self, text):
+        hints = self.determine_block_hints(text)
+        self.write_indicator('>'+hints, True)
+        if hints[-1:] == '+':
+            self.open_ended = True
+        self.write_line_break()
+        leading_space = True
+        spaces = False
+        breaks = True
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if breaks:
+                if ch is None or ch not in '\n\x85\u2028\u2029':
+                    if not leading_space and ch is not None and ch != ' '   \
+                            and text[start] == '\n':
+                        self.write_line_break()
+                    leading_space = (ch == ' ')
+                    for br in text[start:end]:
+                        if br == '\n':
+                            self.write_line_break()
+                        else:
+                            self.write_line_break(br)
+                    if ch is not None:
+                        self.write_indent()
+                    start = end
+            elif spaces:
+                if ch != ' ':
+                    if start+1 == end and self.column > self.best_width:
+                        self.write_indent()
+                    else:
+                        data = text[start:end]
+                        self.column += len(data)
+                        if self.encoding:
+                            data = data.encode(self.encoding)
+                        self.stream.write(data)
+                    start = end
+            else:
+                if ch is None or ch in ' \n\x85\u2028\u2029':
+                    data = text[start:end]
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+                    if ch is None:
+                        self.write_line_break()
+                    start = end
+            if ch is not None:
+                breaks = (ch in '\n\x85\u2028\u2029')
+                spaces = (ch == ' ')
+            end += 1
+
+    def write_literal(self, text):
+        hints = self.determine_block_hints(text)
+        self.write_indicator('|'+hints, True)
+        if hints[-1:] == '+':
+            self.open_ended = True
+        self.write_line_break()
+        breaks = True
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if breaks:
+                if ch is None or ch not in '\n\x85\u2028\u2029':
+                    for br in text[start:end]:
+                        if br == '\n':
+                            self.write_line_break()
+                        else:
+                            self.write_line_break(br)
+                    if ch is not None:
+                        self.write_indent()
+                    start = end
+            else:
+                if ch is None or ch in '\n\x85\u2028\u2029':
+                    data = text[start:end]
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+                    if ch is None:
+                        self.write_line_break()
+                    start = end
+            if ch is not None:
+                breaks = (ch in '\n\x85\u2028\u2029')
+            end += 1
+
+    def write_plain(self, text, split=True):
+        if self.root_context:
+            self.open_ended = True
+        if not text:
+            return
+        if not self.whitespace:
+            data = ' '
+            self.column += len(data)
+            if self.encoding:
+                data = data.encode(self.encoding)
+            self.stream.write(data)
+        self.whitespace = False
+        self.indention = False
+        spaces = False
+        breaks = False
+        start = end = 0
+        while end <= len(text):
+            ch = None
+            if end < len(text):
+                ch = text[end]
+            if spaces:
+                if ch != ' ':
+                    if start+1 == end and self.column > self.best_width and split:
+                        self.write_indent()
+                        self.whitespace = False
+                        self.indention = False
+                    else:
+                        data = text[start:end]
+                        self.column += len(data)
+                        if self.encoding:
+                            data = data.encode(self.encoding)
+                        self.stream.write(data)
+                    start = end
+            elif breaks:
+                if ch not in '\n\x85\u2028\u2029':
+                    if text[start] == '\n':
+                        self.write_line_break()
+                    for br in text[start:end]:
+                        if br == '\n':
+                            self.write_line_break()
+                        else:
+                            self.write_line_break(br)
+                    self.write_indent()
+                    self.whitespace = False
+                    self.indention = False
+                    start = end
+            else:
+                if ch is None or ch in ' \n\x85\u2028\u2029':
+                    data = text[start:end]
+                    self.column += len(data)
+                    if self.encoding:
+                        data = data.encode(self.encoding)
+                    self.stream.write(data)
+                    start = end
+            if ch is not None:
+                spaces = (ch == ' ')
+                breaks = (ch in '\n\x85\u2028\u2029')
+            end += 1
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/error.py b/python3-vckonline/lib/python3.8/site-packages/yaml/error.py
new file mode 100644
index 0000000..b796b4d
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/error.py
@@ -0,0 +1,75 @@
+
+__all__ = ['Mark', 'YAMLError', 'MarkedYAMLError']
+
+class Mark:
+
+    def __init__(self, name, index, line, column, buffer, pointer):
+        self.name = name
+        self.index = index
+        self.line = line
+        self.column = column
+        self.buffer = buffer
+        self.pointer = pointer
+
+    def get_snippet(self, indent=4, max_length=75):
+        if self.buffer is None:
+            return None
+        head = ''
+        start = self.pointer
+        while start > 0 and self.buffer[start-1] not in '\0\r\n\x85\u2028\u2029':
+            start -= 1
+            if self.pointer-start > max_length/2-1:
+                head = ' ... '
+                start += 5
+                break
+        tail = ''
+        end = self.pointer
+        while end < len(self.buffer) and self.buffer[end] not in '\0\r\n\x85\u2028\u2029':
+            end += 1
+            if end-self.pointer > max_length/2-1:
+                tail = ' ... '
+                end -= 5
+                break
+        snippet = self.buffer[start:end]
+        return ' '*indent + head + snippet + tail + '\n'  \
+                + ' '*(indent+self.pointer-start+len(head)) + '^'
+
+    def __str__(self):
+        snippet = self.get_snippet()
+        where = "  in \"%s\", line %d, column %d"   \
+                % (self.name, self.line+1, self.column+1)
+        if snippet is not None:
+            where += ":\n"+snippet
+        return where
+
+class YAMLError(Exception):
+    pass
+
+class MarkedYAMLError(YAMLError):
+
+    def __init__(self, context=None, context_mark=None,
+            problem=None, problem_mark=None, note=None):
+        self.context = context
+        self.context_mark = context_mark
+        self.problem = problem
+        self.problem_mark = problem_mark
+        self.note = note
+
+    def __str__(self):
+        lines = []
+        if self.context is not None:
+            lines.append(self.context)
+        if self.context_mark is not None  \
+            and (self.problem is None or self.problem_mark is None
+                    or self.context_mark.name != self.problem_mark.name
+                    or self.context_mark.line != self.problem_mark.line
+                    or self.context_mark.column != self.problem_mark.column):
+            lines.append(str(self.context_mark))
+        if self.problem is not None:
+            lines.append(self.problem)
+        if self.problem_mark is not None:
+            lines.append(str(self.problem_mark))
+        if self.note is not None:
+            lines.append(self.note)
+        return '\n'.join(lines)
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/events.py b/python3-vckonline/lib/python3.8/site-packages/yaml/events.py
new file mode 100644
index 0000000..f79ad38
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/events.py
@@ -0,0 +1,86 @@
+
+# Abstract classes.
+
+class Event(object):
+    def __init__(self, start_mark=None, end_mark=None):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+    def __repr__(self):
+        attributes = [key for key in ['anchor', 'tag', 'implicit', 'value']
+                if hasattr(self, key)]
+        arguments = ', '.join(['%s=%r' % (key, getattr(self, key))
+                for key in attributes])
+        return '%s(%s)' % (self.__class__.__name__, arguments)
+
+class NodeEvent(Event):
+    def __init__(self, anchor, start_mark=None, end_mark=None):
+        self.anchor = anchor
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+class CollectionStartEvent(NodeEvent):
+    def __init__(self, anchor, tag, implicit, start_mark=None, end_mark=None,
+            flow_style=None):
+        self.anchor = anchor
+        self.tag = tag
+        self.implicit = implicit
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.flow_style = flow_style
+
+class CollectionEndEvent(Event):
+    pass
+
+# Implementations.
+
+class StreamStartEvent(Event):
+    def __init__(self, start_mark=None, end_mark=None, encoding=None):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.encoding = encoding
+
+class StreamEndEvent(Event):
+    pass
+
+class DocumentStartEvent(Event):
+    def __init__(self, start_mark=None, end_mark=None,
+            explicit=None, version=None, tags=None):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.explicit = explicit
+        self.version = version
+        self.tags = tags
+
+class DocumentEndEvent(Event):
+    def __init__(self, start_mark=None, end_mark=None,
+            explicit=None):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.explicit = explicit
+
+class AliasEvent(NodeEvent):
+    pass
+
+class ScalarEvent(NodeEvent):
+    def __init__(self, anchor, tag, implicit, value,
+            start_mark=None, end_mark=None, style=None):
+        self.anchor = anchor
+        self.tag = tag
+        self.implicit = implicit
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.style = style
+
+class SequenceStartEvent(CollectionStartEvent):
+    pass
+
+class SequenceEndEvent(CollectionEndEvent):
+    pass
+
+class MappingStartEvent(CollectionStartEvent):
+    pass
+
+class MappingEndEvent(CollectionEndEvent):
+    pass
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/loader.py b/python3-vckonline/lib/python3.8/site-packages/yaml/loader.py
new file mode 100644
index 0000000..e90c112
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/loader.py
@@ -0,0 +1,63 @@
+
+__all__ = ['BaseLoader', 'FullLoader', 'SafeLoader', 'Loader', 'UnsafeLoader']
+
+from .reader import *
+from .scanner import *
+from .parser import *
+from .composer import *
+from .constructor import *
+from .resolver import *
+
+class BaseLoader(Reader, Scanner, Parser, Composer, BaseConstructor, BaseResolver):
+
+    def __init__(self, stream):
+        Reader.__init__(self, stream)
+        Scanner.__init__(self)
+        Parser.__init__(self)
+        Composer.__init__(self)
+        BaseConstructor.__init__(self)
+        BaseResolver.__init__(self)
+
+class FullLoader(Reader, Scanner, Parser, Composer, FullConstructor, Resolver):
+
+    def __init__(self, stream):
+        Reader.__init__(self, stream)
+        Scanner.__init__(self)
+        Parser.__init__(self)
+        Composer.__init__(self)
+        FullConstructor.__init__(self)
+        Resolver.__init__(self)
+
+class SafeLoader(Reader, Scanner, Parser, Composer, SafeConstructor, Resolver):
+
+    def __init__(self, stream):
+        Reader.__init__(self, stream)
+        Scanner.__init__(self)
+        Parser.__init__(self)
+        Composer.__init__(self)
+        SafeConstructor.__init__(self)
+        Resolver.__init__(self)
+
+class Loader(Reader, Scanner, Parser, Composer, Constructor, Resolver):
+
+    def __init__(self, stream):
+        Reader.__init__(self, stream)
+        Scanner.__init__(self)
+        Parser.__init__(self)
+        Composer.__init__(self)
+        Constructor.__init__(self)
+        Resolver.__init__(self)
+
+# UnsafeLoader is the same as Loader (which is and was always unsafe on
+# untrusted input). Use of either Loader or UnsafeLoader should be rare, since
+# FullLoad should be able to load almost all YAML safely. Loader is left intact
+# to ensure backwards compatibility.
+class UnsafeLoader(Reader, Scanner, Parser, Composer, Constructor, Resolver):
+
+    def __init__(self, stream):
+        Reader.__init__(self, stream)
+        Scanner.__init__(self)
+        Parser.__init__(self)
+        Composer.__init__(self)
+        Constructor.__init__(self)
+        Resolver.__init__(self)
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/nodes.py b/python3-vckonline/lib/python3.8/site-packages/yaml/nodes.py
new file mode 100644
index 0000000..c4f070c
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/nodes.py
@@ -0,0 +1,49 @@
+
+class Node(object):
+    def __init__(self, tag, value, start_mark, end_mark):
+        self.tag = tag
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+    def __repr__(self):
+        value = self.value
+        #if isinstance(value, list):
+        #    if len(value) == 0:
+        #        value = '<empty>'
+        #    elif len(value) == 1:
+        #        value = '<1 item>'
+        #    else:
+        #        value = '<%d items>' % len(value)
+        #else:
+        #    if len(value) > 75:
+        #        value = repr(value[:70]+u' ... ')
+        #    else:
+        #        value = repr(value)
+        value = repr(value)
+        return '%s(tag=%r, value=%s)' % (self.__class__.__name__, self.tag, value)
+
+class ScalarNode(Node):
+    id = 'scalar'
+    def __init__(self, tag, value,
+            start_mark=None, end_mark=None, style=None):
+        self.tag = tag
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.style = style
+
+class CollectionNode(Node):
+    def __init__(self, tag, value,
+            start_mark=None, end_mark=None, flow_style=None):
+        self.tag = tag
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.flow_style = flow_style
+
+class SequenceNode(CollectionNode):
+    id = 'sequence'
+
+class MappingNode(CollectionNode):
+    id = 'mapping'
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/parser.py b/python3-vckonline/lib/python3.8/site-packages/yaml/parser.py
new file mode 100644
index 0000000..13a5995
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/parser.py
@@ -0,0 +1,589 @@
+
+# The following YAML grammar is LL(1) and is parsed by a recursive descent
+# parser.
+#
+# stream            ::= STREAM-START implicit_document? explicit_document* STREAM-END
+# implicit_document ::= block_node DOCUMENT-END*
+# explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
+# block_node_or_indentless_sequence ::=
+#                       ALIAS
+#                       | properties (block_content | indentless_block_sequence)?
+#                       | block_content
+#                       | indentless_block_sequence
+# block_node        ::= ALIAS
+#                       | properties block_content?
+#                       | block_content
+# flow_node         ::= ALIAS
+#                       | properties flow_content?
+#                       | flow_content
+# properties        ::= TAG ANCHOR? | ANCHOR TAG?
+# block_content     ::= block_collection | flow_collection | SCALAR
+# flow_content      ::= flow_collection | SCALAR
+# block_collection  ::= block_sequence | block_mapping
+# flow_collection   ::= flow_sequence | flow_mapping
+# block_sequence    ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
+# indentless_sequence   ::= (BLOCK-ENTRY block_node?)+
+# block_mapping     ::= BLOCK-MAPPING_START
+#                       ((KEY block_node_or_indentless_sequence?)?
+#                       (VALUE block_node_or_indentless_sequence?)?)*
+#                       BLOCK-END
+# flow_sequence     ::= FLOW-SEQUENCE-START
+#                       (flow_sequence_entry FLOW-ENTRY)*
+#                       flow_sequence_entry?
+#                       FLOW-SEQUENCE-END
+# flow_sequence_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+# flow_mapping      ::= FLOW-MAPPING-START
+#                       (flow_mapping_entry FLOW-ENTRY)*
+#                       flow_mapping_entry?
+#                       FLOW-MAPPING-END
+# flow_mapping_entry    ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+#
+# FIRST sets:
+#
+# stream: { STREAM-START }
+# explicit_document: { DIRECTIVE DOCUMENT-START }
+# implicit_document: FIRST(block_node)
+# block_node: { ALIAS TAG ANCHOR SCALAR BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# flow_node: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# block_content: { BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START SCALAR }
+# flow_content: { FLOW-SEQUENCE-START FLOW-MAPPING-START SCALAR }
+# block_collection: { BLOCK-SEQUENCE-START BLOCK-MAPPING-START }
+# flow_collection: { FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# block_sequence: { BLOCK-SEQUENCE-START }
+# block_mapping: { BLOCK-MAPPING-START }
+# block_node_or_indentless_sequence: { ALIAS ANCHOR TAG SCALAR BLOCK-SEQUENCE-START BLOCK-MAPPING-START FLOW-SEQUENCE-START FLOW-MAPPING-START BLOCK-ENTRY }
+# indentless_sequence: { ENTRY }
+# flow_collection: { FLOW-SEQUENCE-START FLOW-MAPPING-START }
+# flow_sequence: { FLOW-SEQUENCE-START }
+# flow_mapping: { FLOW-MAPPING-START }
+# flow_sequence_entry: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START KEY }
+# flow_mapping_entry: { ALIAS ANCHOR TAG SCALAR FLOW-SEQUENCE-START FLOW-MAPPING-START KEY }
+
+__all__ = ['Parser', 'ParserError']
+
+from .error import MarkedYAMLError
+from .tokens import *
+from .events import *
+from .scanner import *
+
+class ParserError(MarkedYAMLError):
+    pass
+
+class Parser:
+    # Since writing a recursive-descendant parser is a straightforward task, we
+    # do not give many comments here.
+
+    DEFAULT_TAGS = {
+        '!':   '!',
+        '!!':  'tag:yaml.org,2002:',
+    }
+
+    def __init__(self):
+        self.current_event = None
+        self.yaml_version = None
+        self.tag_handles = {}
+        self.states = []
+        self.marks = []
+        self.state = self.parse_stream_start
+
+    def dispose(self):
+        # Reset the state attributes (to clear self-references)
+        self.states = []
+        self.state = None
+
+    def check_event(self, *choices):
+        # Check the type of the next event.
+        if self.current_event is None:
+            if self.state:
+                self.current_event = self.state()
+        if self.current_event is not None:
+            if not choices:
+                return True
+            for choice in choices:
+                if isinstance(self.current_event, choice):
+                    return True
+        return False
+
+    def peek_event(self):
+        # Get the next event.
+        if self.current_event is None:
+            if self.state:
+                self.current_event = self.state()
+        return self.current_event
+
+    def get_event(self):
+        # Get the next event and proceed further.
+        if self.current_event is None:
+            if self.state:
+                self.current_event = self.state()
+        value = self.current_event
+        self.current_event = None
+        return value
+
+    # stream    ::= STREAM-START implicit_document? explicit_document* STREAM-END
+    # implicit_document ::= block_node DOCUMENT-END*
+    # explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
+
+    def parse_stream_start(self):
+
+        # Parse the stream start.
+        token = self.get_token()
+        event = StreamStartEvent(token.start_mark, token.end_mark,
+                encoding=token.encoding)
+
+        # Prepare the next state.
+        self.state = self.parse_implicit_document_start
+
+        return event
+
+    def parse_implicit_document_start(self):
+
+        # Parse an implicit document.
+        if not self.check_token(DirectiveToken, DocumentStartToken,
+                StreamEndToken):
+            self.tag_handles = self.DEFAULT_TAGS
+            token = self.peek_token()
+            start_mark = end_mark = token.start_mark
+            event = DocumentStartEvent(start_mark, end_mark,
+                    explicit=False)
+
+            # Prepare the next state.
+            self.states.append(self.parse_document_end)
+            self.state = self.parse_block_node
+
+            return event
+
+        else:
+            return self.parse_document_start()
+
+    def parse_document_start(self):
+
+        # Parse any extra document end indicators.
+        while self.check_token(DocumentEndToken):
+            self.get_token()
+
+        # Parse an explicit document.
+        if not self.check_token(StreamEndToken):
+            token = self.peek_token()
+            start_mark = token.start_mark
+            version, tags = self.process_directives()
+            if not self.check_token(DocumentStartToken):
+                raise ParserError(None, None,
+                        "expected '<document start>', but found %r"
+                        % self.peek_token().id,
+                        self.peek_token().start_mark)
+            token = self.get_token()
+            end_mark = token.end_mark
+            event = DocumentStartEvent(start_mark, end_mark,
+                    explicit=True, version=version, tags=tags)
+            self.states.append(self.parse_document_end)
+            self.state = self.parse_document_content
+        else:
+            # Parse the end of the stream.
+            token = self.get_token()
+            event = StreamEndEvent(token.start_mark, token.end_mark)
+            assert not self.states
+            assert not self.marks
+            self.state = None
+        return event
+
+    def parse_document_end(self):
+
+        # Parse the document end.
+        token = self.peek_token()
+        start_mark = end_mark = token.start_mark
+        explicit = False
+        if self.check_token(DocumentEndToken):
+            token = self.get_token()
+            end_mark = token.end_mark
+            explicit = True
+        event = DocumentEndEvent(start_mark, end_mark,
+                explicit=explicit)
+
+        # Prepare the next state.
+        self.state = self.parse_document_start
+
+        return event
+
+    def parse_document_content(self):
+        if self.check_token(DirectiveToken,
+                DocumentStartToken, DocumentEndToken, StreamEndToken):
+            event = self.process_empty_scalar(self.peek_token().start_mark)
+            self.state = self.states.pop()
+            return event
+        else:
+            return self.parse_block_node()
+
+    def process_directives(self):
+        self.yaml_version = None
+        self.tag_handles = {}
+        while self.check_token(DirectiveToken):
+            token = self.get_token()
+            if token.name == 'YAML':
+                if self.yaml_version is not None:
+                    raise ParserError(None, None,
+                            "found duplicate YAML directive", token.start_mark)
+                major, minor = token.value
+                if major != 1:
+                    raise ParserError(None, None,
+                            "found incompatible YAML document (version 1.* is required)",
+                            token.start_mark)
+                self.yaml_version = token.value
+            elif token.name == 'TAG':
+                handle, prefix = token.value
+                if handle in self.tag_handles:
+                    raise ParserError(None, None,
+                            "duplicate tag handle %r" % handle,
+                            token.start_mark)
+                self.tag_handles[handle] = prefix
+        if self.tag_handles:
+            value = self.yaml_version, self.tag_handles.copy()
+        else:
+            value = self.yaml_version, None
+        for key in self.DEFAULT_TAGS:
+            if key not in self.tag_handles:
+                self.tag_handles[key] = self.DEFAULT_TAGS[key]
+        return value
+
+    # block_node_or_indentless_sequence ::= ALIAS
+    #               | properties (block_content | indentless_block_sequence)?
+    #               | block_content
+    #               | indentless_block_sequence
+    # block_node    ::= ALIAS
+    #                   | properties block_content?
+    #                   | block_content
+    # flow_node     ::= ALIAS
+    #                   | properties flow_content?
+    #                   | flow_content
+    # properties    ::= TAG ANCHOR? | ANCHOR TAG?
+    # block_content     ::= block_collection | flow_collection | SCALAR
+    # flow_content      ::= flow_collection | SCALAR
+    # block_collection  ::= block_sequence | block_mapping
+    # flow_collection   ::= flow_sequence | flow_mapping
+
+    def parse_block_node(self):
+        return self.parse_node(block=True)
+
+    def parse_flow_node(self):
+        return self.parse_node()
+
+    def parse_block_node_or_indentless_sequence(self):
+        return self.parse_node(block=True, indentless_sequence=True)
+
+    def parse_node(self, block=False, indentless_sequence=False):
+        if self.check_token(AliasToken):
+            token = self.get_token()
+            event = AliasEvent(token.value, token.start_mark, token.end_mark)
+            self.state = self.states.pop()
+        else:
+            anchor = None
+            tag = None
+            start_mark = end_mark = tag_mark = None
+            if self.check_token(AnchorToken):
+                token = self.get_token()
+                start_mark = token.start_mark
+                end_mark = token.end_mark
+                anchor = token.value
+                if self.check_token(TagToken):
+                    token = self.get_token()
+                    tag_mark = token.start_mark
+                    end_mark = token.end_mark
+                    tag = token.value
+            elif self.check_token(TagToken):
+                token = self.get_token()
+                start_mark = tag_mark = token.start_mark
+                end_mark = token.end_mark
+                tag = token.value
+                if self.check_token(AnchorToken):
+                    token = self.get_token()
+                    end_mark = token.end_mark
+                    anchor = token.value
+            if tag is not None:
+                handle, suffix = tag
+                if handle is not None:
+                    if handle not in self.tag_handles:
+                        raise ParserError("while parsing a node", start_mark,
+                                "found undefined tag handle %r" % handle,
+                                tag_mark)
+                    tag = self.tag_handles[handle]+suffix
+                else:
+                    tag = suffix
+            #if tag == '!':
+            #    raise ParserError("while parsing a node", start_mark,
+            #            "found non-specific tag '!'", tag_mark,
+            #            "Please check 'http://pyyaml.org/wiki/YAMLNonSpecificTag' and share your opinion.")
+            if start_mark is None:
+                start_mark = end_mark = self.peek_token().start_mark
+            event = None
+            implicit = (tag is None or tag == '!')
+            if indentless_sequence and self.check_token(BlockEntryToken):
+                end_mark = self.peek_token().end_mark
+                event = SequenceStartEvent(anchor, tag, implicit,
+                        start_mark, end_mark)
+                self.state = self.parse_indentless_sequence_entry
+            else:
+                if self.check_token(ScalarToken):
+                    token = self.get_token()
+                    end_mark = token.end_mark
+                    if (token.plain and tag is None) or tag == '!':
+                        implicit = (True, False)
+                    elif tag is None:
+                        implicit = (False, True)
+                    else:
+                        implicit = (False, False)
+                    event = ScalarEvent(anchor, tag, implicit, token.value,
+                            start_mark, end_mark, style=token.style)
+                    self.state = self.states.pop()
+                elif self.check_token(FlowSequenceStartToken):
+                    end_mark = self.peek_token().end_mark
+                    event = SequenceStartEvent(anchor, tag, implicit,
+                            start_mark, end_mark, flow_style=True)
+                    self.state = self.parse_flow_sequence_first_entry
+                elif self.check_token(FlowMappingStartToken):
+                    end_mark = self.peek_token().end_mark
+                    event = MappingStartEvent(anchor, tag, implicit,
+                            start_mark, end_mark, flow_style=True)
+                    self.state = self.parse_flow_mapping_first_key
+                elif block and self.check_token(BlockSequenceStartToken):
+                    end_mark = self.peek_token().start_mark
+                    event = SequenceStartEvent(anchor, tag, implicit,
+                            start_mark, end_mark, flow_style=False)
+                    self.state = self.parse_block_sequence_first_entry
+                elif block and self.check_token(BlockMappingStartToken):
+                    end_mark = self.peek_token().start_mark
+                    event = MappingStartEvent(anchor, tag, implicit,
+                            start_mark, end_mark, flow_style=False)
+                    self.state = self.parse_block_mapping_first_key
+                elif anchor is not None or tag is not None:
+                    # Empty scalars are allowed even if a tag or an anchor is
+                    # specified.
+                    event = ScalarEvent(anchor, tag, (implicit, False), '',
+                            start_mark, end_mark)
+                    self.state = self.states.pop()
+                else:
+                    if block:
+                        node = 'block'
+                    else:
+                        node = 'flow'
+                    token = self.peek_token()
+                    raise ParserError("while parsing a %s node" % node, start_mark,
+                            "expected the node content, but found %r" % token.id,
+                            token.start_mark)
+        return event
+
+    # block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
+
+    def parse_block_sequence_first_entry(self):
+        token = self.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_block_sequence_entry()
+
+    def parse_block_sequence_entry(self):
+        if self.check_token(BlockEntryToken):
+            token = self.get_token()
+            if not self.check_token(BlockEntryToken, BlockEndToken):
+                self.states.append(self.parse_block_sequence_entry)
+                return self.parse_block_node()
+            else:
+                self.state = self.parse_block_sequence_entry
+                return self.process_empty_scalar(token.end_mark)
+        if not self.check_token(BlockEndToken):
+            token = self.peek_token()
+            raise ParserError("while parsing a block collection", self.marks[-1],
+                    "expected <block end>, but found %r" % token.id, token.start_mark)
+        token = self.get_token()
+        event = SequenceEndEvent(token.start_mark, token.end_mark)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    # indentless_sequence ::= (BLOCK-ENTRY block_node?)+
+
+    def parse_indentless_sequence_entry(self):
+        if self.check_token(BlockEntryToken):
+            token = self.get_token()
+            if not self.check_token(BlockEntryToken,
+                    KeyToken, ValueToken, BlockEndToken):
+                self.states.append(self.parse_indentless_sequence_entry)
+                return self.parse_block_node()
+            else:
+                self.state = self.parse_indentless_sequence_entry
+                return self.process_empty_scalar(token.end_mark)
+        token = self.peek_token()
+        event = SequenceEndEvent(token.start_mark, token.start_mark)
+        self.state = self.states.pop()
+        return event
+
+    # block_mapping     ::= BLOCK-MAPPING_START
+    #                       ((KEY block_node_or_indentless_sequence?)?
+    #                       (VALUE block_node_or_indentless_sequence?)?)*
+    #                       BLOCK-END
+
+    def parse_block_mapping_first_key(self):
+        token = self.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_block_mapping_key()
+
+    def parse_block_mapping_key(self):
+        if self.check_token(KeyToken):
+            token = self.get_token()
+            if not self.check_token(KeyToken, ValueToken, BlockEndToken):
+                self.states.append(self.parse_block_mapping_value)
+                return self.parse_block_node_or_indentless_sequence()
+            else:
+                self.state = self.parse_block_mapping_value
+                return self.process_empty_scalar(token.end_mark)
+        if not self.check_token(BlockEndToken):
+            token = self.peek_token()
+            raise ParserError("while parsing a block mapping", self.marks[-1],
+                    "expected <block end>, but found %r" % token.id, token.start_mark)
+        token = self.get_token()
+        event = MappingEndEvent(token.start_mark, token.end_mark)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    def parse_block_mapping_value(self):
+        if self.check_token(ValueToken):
+            token = self.get_token()
+            if not self.check_token(KeyToken, ValueToken, BlockEndToken):
+                self.states.append(self.parse_block_mapping_key)
+                return self.parse_block_node_or_indentless_sequence()
+            else:
+                self.state = self.parse_block_mapping_key
+                return self.process_empty_scalar(token.end_mark)
+        else:
+            self.state = self.parse_block_mapping_key
+            token = self.peek_token()
+            return self.process_empty_scalar(token.start_mark)
+
+    # flow_sequence     ::= FLOW-SEQUENCE-START
+    #                       (flow_sequence_entry FLOW-ENTRY)*
+    #                       flow_sequence_entry?
+    #                       FLOW-SEQUENCE-END
+    # flow_sequence_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+    #
+    # Note that while production rules for both flow_sequence_entry and
+    # flow_mapping_entry are equal, their interpretations are different.
+    # For `flow_sequence_entry`, the part `KEY flow_node? (VALUE flow_node?)?`
+    # generate an inline mapping (set syntax).
+
+    def parse_flow_sequence_first_entry(self):
+        token = self.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_flow_sequence_entry(first=True)
+
+    def parse_flow_sequence_entry(self, first=False):
+        if not self.check_token(FlowSequenceEndToken):
+            if not first:
+                if self.check_token(FlowEntryToken):
+                    self.get_token()
+                else:
+                    token = self.peek_token()
+                    raise ParserError("while parsing a flow sequence", self.marks[-1],
+                            "expected ',' or ']', but got %r" % token.id, token.start_mark)
+            
+            if self.check_token(KeyToken):
+                token = self.peek_token()
+                event = MappingStartEvent(None, None, True,
+                        token.start_mark, token.end_mark,
+                        flow_style=True)
+                self.state = self.parse_flow_sequence_entry_mapping_key
+                return event
+            elif not self.check_token(FlowSequenceEndToken):
+                self.states.append(self.parse_flow_sequence_entry)
+                return self.parse_flow_node()
+        token = self.get_token()
+        event = SequenceEndEvent(token.start_mark, token.end_mark)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    def parse_flow_sequence_entry_mapping_key(self):
+        token = self.get_token()
+        if not self.check_token(ValueToken,
+                FlowEntryToken, FlowSequenceEndToken):
+            self.states.append(self.parse_flow_sequence_entry_mapping_value)
+            return self.parse_flow_node()
+        else:
+            self.state = self.parse_flow_sequence_entry_mapping_value
+            return self.process_empty_scalar(token.end_mark)
+
+    def parse_flow_sequence_entry_mapping_value(self):
+        if self.check_token(ValueToken):
+            token = self.get_token()
+            if not self.check_token(FlowEntryToken, FlowSequenceEndToken):
+                self.states.append(self.parse_flow_sequence_entry_mapping_end)
+                return self.parse_flow_node()
+            else:
+                self.state = self.parse_flow_sequence_entry_mapping_end
+                return self.process_empty_scalar(token.end_mark)
+        else:
+            self.state = self.parse_flow_sequence_entry_mapping_end
+            token = self.peek_token()
+            return self.process_empty_scalar(token.start_mark)
+
+    def parse_flow_sequence_entry_mapping_end(self):
+        self.state = self.parse_flow_sequence_entry
+        token = self.peek_token()
+        return MappingEndEvent(token.start_mark, token.start_mark)
+
+    # flow_mapping  ::= FLOW-MAPPING-START
+    #                   (flow_mapping_entry FLOW-ENTRY)*
+    #                   flow_mapping_entry?
+    #                   FLOW-MAPPING-END
+    # flow_mapping_entry    ::= flow_node | KEY flow_node? (VALUE flow_node?)?
+
+    def parse_flow_mapping_first_key(self):
+        token = self.get_token()
+        self.marks.append(token.start_mark)
+        return self.parse_flow_mapping_key(first=True)
+
+    def parse_flow_mapping_key(self, first=False):
+        if not self.check_token(FlowMappingEndToken):
+            if not first:
+                if self.check_token(FlowEntryToken):
+                    self.get_token()
+                else:
+                    token = self.peek_token()
+                    raise ParserError("while parsing a flow mapping", self.marks[-1],
+                            "expected ',' or '}', but got %r" % token.id, token.start_mark)
+            if self.check_token(KeyToken):
+                token = self.get_token()
+                if not self.check_token(ValueToken,
+                        FlowEntryToken, FlowMappingEndToken):
+                    self.states.append(self.parse_flow_mapping_value)
+                    return self.parse_flow_node()
+                else:
+                    self.state = self.parse_flow_mapping_value
+                    return self.process_empty_scalar(token.end_mark)
+            elif not self.check_token(FlowMappingEndToken):
+                self.states.append(self.parse_flow_mapping_empty_value)
+                return self.parse_flow_node()
+        token = self.get_token()
+        event = MappingEndEvent(token.start_mark, token.end_mark)
+        self.state = self.states.pop()
+        self.marks.pop()
+        return event
+
+    def parse_flow_mapping_value(self):
+        if self.check_token(ValueToken):
+            token = self.get_token()
+            if not self.check_token(FlowEntryToken, FlowMappingEndToken):
+                self.states.append(self.parse_flow_mapping_key)
+                return self.parse_flow_node()
+            else:
+                self.state = self.parse_flow_mapping_key
+                return self.process_empty_scalar(token.end_mark)
+        else:
+            self.state = self.parse_flow_mapping_key
+            token = self.peek_token()
+            return self.process_empty_scalar(token.start_mark)
+
+    def parse_flow_mapping_empty_value(self):
+        self.state = self.parse_flow_mapping_key
+        return self.process_empty_scalar(self.peek_token().start_mark)
+
+    def process_empty_scalar(self, mark):
+        return ScalarEvent(None, None, (True, False), '', mark, mark)
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/reader.py b/python3-vckonline/lib/python3.8/site-packages/yaml/reader.py
new file mode 100644
index 0000000..774b021
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/reader.py
@@ -0,0 +1,185 @@
+# This module contains abstractions for the input stream. You don't have to
+# looks further, there are no pretty code.
+#
+# We define two classes here.
+#
+#   Mark(source, line, column)
+# It's just a record and its only use is producing nice error messages.
+# Parser does not use it for any other purposes.
+#
+#   Reader(source, data)
+# Reader determines the encoding of `data` and converts it to unicode.
+# Reader provides the following methods and attributes:
+#   reader.peek(length=1) - return the next `length` characters
+#   reader.forward(length=1) - move the current position to `length` characters.
+#   reader.index - the number of the current character.
+#   reader.line, stream.column - the line and the column of the current character.
+
+__all__ = ['Reader', 'ReaderError']
+
+from .error import YAMLError, Mark
+
+import codecs, re
+
+class ReaderError(YAMLError):
+
+    def __init__(self, name, position, character, encoding, reason):
+        self.name = name
+        self.character = character
+        self.position = position
+        self.encoding = encoding
+        self.reason = reason
+
+    def __str__(self):
+        if isinstance(self.character, bytes):
+            return "'%s' codec can't decode byte #x%02x: %s\n"  \
+                    "  in \"%s\", position %d"    \
+                    % (self.encoding, ord(self.character), self.reason,
+                            self.name, self.position)
+        else:
+            return "unacceptable character #x%04x: %s\n"    \
+                    "  in \"%s\", position %d"    \
+                    % (self.character, self.reason,
+                            self.name, self.position)
+
+class Reader(object):
+    # Reader:
+    # - determines the data encoding and converts it to a unicode string,
+    # - checks if characters are in allowed range,
+    # - adds '\0' to the end.
+
+    # Reader accepts
+    #  - a `bytes` object,
+    #  - a `str` object,
+    #  - a file-like object with its `read` method returning `str`,
+    #  - a file-like object with its `read` method returning `unicode`.
+
+    # Yeah, it's ugly and slow.
+
+    def __init__(self, stream):
+        self.name = None
+        self.stream = None
+        self.stream_pointer = 0
+        self.eof = True
+        self.buffer = ''
+        self.pointer = 0
+        self.raw_buffer = None
+        self.raw_decode = None
+        self.encoding = None
+        self.index = 0
+        self.line = 0
+        self.column = 0
+        if isinstance(stream, str):
+            self.name = "<unicode string>"
+            self.check_printable(stream)
+            self.buffer = stream+'\0'
+        elif isinstance(stream, bytes):
+            self.name = "<byte string>"
+            self.raw_buffer = stream
+            self.determine_encoding()
+        else:
+            self.stream = stream
+            self.name = getattr(stream, 'name', "<file>")
+            self.eof = False
+            self.raw_buffer = None
+            self.determine_encoding()
+
+    def peek(self, index=0):
+        try:
+            return self.buffer[self.pointer+index]
+        except IndexError:
+            self.update(index+1)
+            return self.buffer[self.pointer+index]
+
+    def prefix(self, length=1):
+        if self.pointer+length >= len(self.buffer):
+            self.update(length)
+        return self.buffer[self.pointer:self.pointer+length]
+
+    def forward(self, length=1):
+        if self.pointer+length+1 >= len(self.buffer):
+            self.update(length+1)
+        while length:
+            ch = self.buffer[self.pointer]
+            self.pointer += 1
+            self.index += 1
+            if ch in '\n\x85\u2028\u2029'  \
+                    or (ch == '\r' and self.buffer[self.pointer] != '\n'):
+                self.line += 1
+                self.column = 0
+            elif ch != '\uFEFF':
+                self.column += 1
+            length -= 1
+
+    def get_mark(self):
+        if self.stream is None:
+            return Mark(self.name, self.index, self.line, self.column,
+                    self.buffer, self.pointer)
+        else:
+            return Mark(self.name, self.index, self.line, self.column,
+                    None, None)
+
+    def determine_encoding(self):
+        while not self.eof and (self.raw_buffer is None or len(self.raw_buffer) < 2):
+            self.update_raw()
+        if isinstance(self.raw_buffer, bytes):
+            if self.raw_buffer.startswith(codecs.BOM_UTF16_LE):
+                self.raw_decode = codecs.utf_16_le_decode
+                self.encoding = 'utf-16-le'
+            elif self.raw_buffer.startswith(codecs.BOM_UTF16_BE):
+                self.raw_decode = codecs.utf_16_be_decode
+                self.encoding = 'utf-16-be'
+            else:
+                self.raw_decode = codecs.utf_8_decode
+                self.encoding = 'utf-8'
+        self.update(1)
+
+    NON_PRINTABLE = re.compile('[^\x09\x0A\x0D\x20-\x7E\x85\xA0-\uD7FF\uE000-\uFFFD\U00010000-\U0010ffff]')
+    def check_printable(self, data):
+        match = self.NON_PRINTABLE.search(data)
+        if match:
+            character = match.group()
+            position = self.index+(len(self.buffer)-self.pointer)+match.start()
+            raise ReaderError(self.name, position, ord(character),
+                    'unicode', "special characters are not allowed")
+
+    def update(self, length):
+        if self.raw_buffer is None:
+            return
+        self.buffer = self.buffer[self.pointer:]
+        self.pointer = 0
+        while len(self.buffer) < length:
+            if not self.eof:
+                self.update_raw()
+            if self.raw_decode is not None:
+                try:
+                    data, converted = self.raw_decode(self.raw_buffer,
+                            'strict', self.eof)
+                except UnicodeDecodeError as exc:
+                    character = self.raw_buffer[exc.start]
+                    if self.stream is not None:
+                        position = self.stream_pointer-len(self.raw_buffer)+exc.start
+                    else:
+                        position = exc.start
+                    raise ReaderError(self.name, position, character,
+                            exc.encoding, exc.reason)
+            else:
+                data = self.raw_buffer
+                converted = len(data)
+            self.check_printable(data)
+            self.buffer += data
+            self.raw_buffer = self.raw_buffer[converted:]
+            if self.eof:
+                self.buffer += '\0'
+                self.raw_buffer = None
+                break
+
+    def update_raw(self, size=4096):
+        data = self.stream.read(size)
+        if self.raw_buffer is None:
+            self.raw_buffer = data
+        else:
+            self.raw_buffer += data
+        self.stream_pointer += len(data)
+        if not data:
+            self.eof = True
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/representer.py b/python3-vckonline/lib/python3.8/site-packages/yaml/representer.py
new file mode 100644
index 0000000..3b0b192
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/representer.py
@@ -0,0 +1,389 @@
+
+__all__ = ['BaseRepresenter', 'SafeRepresenter', 'Representer',
+    'RepresenterError']
+
+from .error import *
+from .nodes import *
+
+import datetime, copyreg, types, base64, collections
+
+class RepresenterError(YAMLError):
+    pass
+
+class BaseRepresenter:
+
+    yaml_representers = {}
+    yaml_multi_representers = {}
+
+    def __init__(self, default_style=None, default_flow_style=False, sort_keys=True):
+        self.default_style = default_style
+        self.sort_keys = sort_keys
+        self.default_flow_style = default_flow_style
+        self.represented_objects = {}
+        self.object_keeper = []
+        self.alias_key = None
+
+    def represent(self, data):
+        node = self.represent_data(data)
+        self.serialize(node)
+        self.represented_objects = {}
+        self.object_keeper = []
+        self.alias_key = None
+
+    def represent_data(self, data):
+        if self.ignore_aliases(data):
+            self.alias_key = None
+        else:
+            self.alias_key = id(data)
+        if self.alias_key is not None:
+            if self.alias_key in self.represented_objects:
+                node = self.represented_objects[self.alias_key]
+                #if node is None:
+                #    raise RepresenterError("recursive objects are not allowed: %r" % data)
+                return node
+            #self.represented_objects[alias_key] = None
+            self.object_keeper.append(data)
+        data_types = type(data).__mro__
+        if data_types[0] in self.yaml_representers:
+            node = self.yaml_representers[data_types[0]](self, data)
+        else:
+            for data_type in data_types:
+                if data_type in self.yaml_multi_representers:
+                    node = self.yaml_multi_representers[data_type](self, data)
+                    break
+            else:
+                if None in self.yaml_multi_representers:
+                    node = self.yaml_multi_representers[None](self, data)
+                elif None in self.yaml_representers:
+                    node = self.yaml_representers[None](self, data)
+                else:
+                    node = ScalarNode(None, str(data))
+        #if alias_key is not None:
+        #    self.represented_objects[alias_key] = node
+        return node
+
+    @classmethod
+    def add_representer(cls, data_type, representer):
+        if not 'yaml_representers' in cls.__dict__:
+            cls.yaml_representers = cls.yaml_representers.copy()
+        cls.yaml_representers[data_type] = representer
+
+    @classmethod
+    def add_multi_representer(cls, data_type, representer):
+        if not 'yaml_multi_representers' in cls.__dict__:
+            cls.yaml_multi_representers = cls.yaml_multi_representers.copy()
+        cls.yaml_multi_representers[data_type] = representer
+
+    def represent_scalar(self, tag, value, style=None):
+        if style is None:
+            style = self.default_style
+        node = ScalarNode(tag, value, style=style)
+        if self.alias_key is not None:
+            self.represented_objects[self.alias_key] = node
+        return node
+
+    def represent_sequence(self, tag, sequence, flow_style=None):
+        value = []
+        node = SequenceNode(tag, value, flow_style=flow_style)
+        if self.alias_key is not None:
+            self.represented_objects[self.alias_key] = node
+        best_style = True
+        for item in sequence:
+            node_item = self.represent_data(item)
+            if not (isinstance(node_item, ScalarNode) and not node_item.style):
+                best_style = False
+            value.append(node_item)
+        if flow_style is None:
+            if self.default_flow_style is not None:
+                node.flow_style = self.default_flow_style
+            else:
+                node.flow_style = best_style
+        return node
+
+    def represent_mapping(self, tag, mapping, flow_style=None):
+        value = []
+        node = MappingNode(tag, value, flow_style=flow_style)
+        if self.alias_key is not None:
+            self.represented_objects[self.alias_key] = node
+        best_style = True
+        if hasattr(mapping, 'items'):
+            mapping = list(mapping.items())
+            if self.sort_keys:
+                try:
+                    mapping = sorted(mapping)
+                except TypeError:
+                    pass
+        for item_key, item_value in mapping:
+            node_key = self.represent_data(item_key)
+            node_value = self.represent_data(item_value)
+            if not (isinstance(node_key, ScalarNode) and not node_key.style):
+                best_style = False
+            if not (isinstance(node_value, ScalarNode) and not node_value.style):
+                best_style = False
+            value.append((node_key, node_value))
+        if flow_style is None:
+            if self.default_flow_style is not None:
+                node.flow_style = self.default_flow_style
+            else:
+                node.flow_style = best_style
+        return node
+
+    def ignore_aliases(self, data):
+        return False
+
+class SafeRepresenter(BaseRepresenter):
+
+    def ignore_aliases(self, data):
+        if data is None:
+            return True
+        if isinstance(data, tuple) and data == ():
+            return True
+        if isinstance(data, (str, bytes, bool, int, float)):
+            return True
+
+    def represent_none(self, data):
+        return self.represent_scalar('tag:yaml.org,2002:null', 'null')
+
+    def represent_str(self, data):
+        return self.represent_scalar('tag:yaml.org,2002:str', data)
+
+    def represent_binary(self, data):
+        if hasattr(base64, 'encodebytes'):
+            data = base64.encodebytes(data).decode('ascii')
+        else:
+            data = base64.encodestring(data).decode('ascii')
+        return self.represent_scalar('tag:yaml.org,2002:binary', data, style='|')
+
+    def represent_bool(self, data):
+        if data:
+            value = 'true'
+        else:
+            value = 'false'
+        return self.represent_scalar('tag:yaml.org,2002:bool', value)
+
+    def represent_int(self, data):
+        return self.represent_scalar('tag:yaml.org,2002:int', str(data))
+
+    inf_value = 1e300
+    while repr(inf_value) != repr(inf_value*inf_value):
+        inf_value *= inf_value
+
+    def represent_float(self, data):
+        if data != data or (data == 0.0 and data == 1.0):
+            value = '.nan'
+        elif data == self.inf_value:
+            value = '.inf'
+        elif data == -self.inf_value:
+            value = '-.inf'
+        else:
+            value = repr(data).lower()
+            # Note that in some cases `repr(data)` represents a float number
+            # without the decimal parts.  For instance:
+            #   >>> repr(1e17)
+            #   '1e17'
+            # Unfortunately, this is not a valid float representation according
+            # to the definition of the `!!float` tag.  We fix this by adding
+            # '.0' before the 'e' symbol.
+            if '.' not in value and 'e' in value:
+                value = value.replace('e', '.0e', 1)
+        return self.represent_scalar('tag:yaml.org,2002:float', value)
+
+    def represent_list(self, data):
+        #pairs = (len(data) > 0 and isinstance(data, list))
+        #if pairs:
+        #    for item in data:
+        #        if not isinstance(item, tuple) or len(item) != 2:
+        #            pairs = False
+        #            break
+        #if not pairs:
+            return self.represent_sequence('tag:yaml.org,2002:seq', data)
+        #value = []
+        #for item_key, item_value in data:
+        #    value.append(self.represent_mapping(u'tag:yaml.org,2002:map',
+        #        [(item_key, item_value)]))
+        #return SequenceNode(u'tag:yaml.org,2002:pairs', value)
+
+    def represent_dict(self, data):
+        return self.represent_mapping('tag:yaml.org,2002:map', data)
+
+    def represent_set(self, data):
+        value = {}
+        for key in data:
+            value[key] = None
+        return self.represent_mapping('tag:yaml.org,2002:set', value)
+
+    def represent_date(self, data):
+        value = data.isoformat()
+        return self.represent_scalar('tag:yaml.org,2002:timestamp', value)
+
+    def represent_datetime(self, data):
+        value = data.isoformat(' ')
+        return self.represent_scalar('tag:yaml.org,2002:timestamp', value)
+
+    def represent_yaml_object(self, tag, data, cls, flow_style=None):
+        if hasattr(data, '__getstate__'):
+            state = data.__getstate__()
+        else:
+            state = data.__dict__.copy()
+        return self.represent_mapping(tag, state, flow_style=flow_style)
+
+    def represent_undefined(self, data):
+        raise RepresenterError("cannot represent an object", data)
+
+SafeRepresenter.add_representer(type(None),
+        SafeRepresenter.represent_none)
+
+SafeRepresenter.add_representer(str,
+        SafeRepresenter.represent_str)
+
+SafeRepresenter.add_representer(bytes,
+        SafeRepresenter.represent_binary)
+
+SafeRepresenter.add_representer(bool,
+        SafeRepresenter.represent_bool)
+
+SafeRepresenter.add_representer(int,
+        SafeRepresenter.represent_int)
+
+SafeRepresenter.add_representer(float,
+        SafeRepresenter.represent_float)
+
+SafeRepresenter.add_representer(list,
+        SafeRepresenter.represent_list)
+
+SafeRepresenter.add_representer(tuple,
+        SafeRepresenter.represent_list)
+
+SafeRepresenter.add_representer(dict,
+        SafeRepresenter.represent_dict)
+
+SafeRepresenter.add_representer(set,
+        SafeRepresenter.represent_set)
+
+SafeRepresenter.add_representer(datetime.date,
+        SafeRepresenter.represent_date)
+
+SafeRepresenter.add_representer(datetime.datetime,
+        SafeRepresenter.represent_datetime)
+
+SafeRepresenter.add_representer(None,
+        SafeRepresenter.represent_undefined)
+
+class Representer(SafeRepresenter):
+
+    def represent_complex(self, data):
+        if data.imag == 0.0:
+            data = '%r' % data.real
+        elif data.real == 0.0:
+            data = '%rj' % data.imag
+        elif data.imag > 0:
+            data = '%r+%rj' % (data.real, data.imag)
+        else:
+            data = '%r%rj' % (data.real, data.imag)
+        return self.represent_scalar('tag:yaml.org,2002:python/complex', data)
+
+    def represent_tuple(self, data):
+        return self.represent_sequence('tag:yaml.org,2002:python/tuple', data)
+
+    def represent_name(self, data):
+        name = '%s.%s' % (data.__module__, data.__name__)
+        return self.represent_scalar('tag:yaml.org,2002:python/name:'+name, '')
+
+    def represent_module(self, data):
+        return self.represent_scalar(
+                'tag:yaml.org,2002:python/module:'+data.__name__, '')
+
+    def represent_object(self, data):
+        # We use __reduce__ API to save the data. data.__reduce__ returns
+        # a tuple of length 2-5:
+        #   (function, args, state, listitems, dictitems)
+
+        # For reconstructing, we calls function(*args), then set its state,
+        # listitems, and dictitems if they are not None.
+
+        # A special case is when function.__name__ == '__newobj__'. In this
+        # case we create the object with args[0].__new__(*args).
+
+        # Another special case is when __reduce__ returns a string - we don't
+        # support it.
+
+        # We produce a !!python/object, !!python/object/new or
+        # !!python/object/apply node.
+
+        cls = type(data)
+        if cls in copyreg.dispatch_table:
+            reduce = copyreg.dispatch_table[cls](data)
+        elif hasattr(data, '__reduce_ex__'):
+            reduce = data.__reduce_ex__(2)
+        elif hasattr(data, '__reduce__'):
+            reduce = data.__reduce__()
+        else:
+            raise RepresenterError("cannot represent an object", data)
+        reduce = (list(reduce)+[None]*5)[:5]
+        function, args, state, listitems, dictitems = reduce
+        args = list(args)
+        if state is None:
+            state = {}
+        if listitems is not None:
+            listitems = list(listitems)
+        if dictitems is not None:
+            dictitems = dict(dictitems)
+        if function.__name__ == '__newobj__':
+            function = args[0]
+            args = args[1:]
+            tag = 'tag:yaml.org,2002:python/object/new:'
+            newobj = True
+        else:
+            tag = 'tag:yaml.org,2002:python/object/apply:'
+            newobj = False
+        function_name = '%s.%s' % (function.__module__, function.__name__)
+        if not args and not listitems and not dictitems \
+                and isinstance(state, dict) and newobj:
+            return self.represent_mapping(
+                    'tag:yaml.org,2002:python/object:'+function_name, state)
+        if not listitems and not dictitems  \
+                and isinstance(state, dict) and not state:
+            return self.represent_sequence(tag+function_name, args)
+        value = {}
+        if args:
+            value['args'] = args
+        if state or not isinstance(state, dict):
+            value['state'] = state
+        if listitems:
+            value['listitems'] = listitems
+        if dictitems:
+            value['dictitems'] = dictitems
+        return self.represent_mapping(tag+function_name, value)
+
+    def represent_ordered_dict(self, data):
+        # Provide uniform representation across different Python versions.
+        data_type = type(data)
+        tag = 'tag:yaml.org,2002:python/object/apply:%s.%s' \
+                % (data_type.__module__, data_type.__name__)
+        items = [[key, value] for key, value in data.items()]
+        return self.represent_sequence(tag, [items])
+
+Representer.add_representer(complex,
+        Representer.represent_complex)
+
+Representer.add_representer(tuple,
+        Representer.represent_tuple)
+
+Representer.add_representer(type,
+        Representer.represent_name)
+
+Representer.add_representer(collections.OrderedDict,
+        Representer.represent_ordered_dict)
+
+Representer.add_representer(types.FunctionType,
+        Representer.represent_name)
+
+Representer.add_representer(types.BuiltinFunctionType,
+        Representer.represent_name)
+
+Representer.add_representer(types.ModuleType,
+        Representer.represent_module)
+
+Representer.add_multi_representer(object,
+        Representer.represent_object)
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/resolver.py b/python3-vckonline/lib/python3.8/site-packages/yaml/resolver.py
new file mode 100644
index 0000000..02b82e7
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/resolver.py
@@ -0,0 +1,227 @@
+
+__all__ = ['BaseResolver', 'Resolver']
+
+from .error import *
+from .nodes import *
+
+import re
+
+class ResolverError(YAMLError):
+    pass
+
+class BaseResolver:
+
+    DEFAULT_SCALAR_TAG = 'tag:yaml.org,2002:str'
+    DEFAULT_SEQUENCE_TAG = 'tag:yaml.org,2002:seq'
+    DEFAULT_MAPPING_TAG = 'tag:yaml.org,2002:map'
+
+    yaml_implicit_resolvers = {}
+    yaml_path_resolvers = {}
+
+    def __init__(self):
+        self.resolver_exact_paths = []
+        self.resolver_prefix_paths = []
+
+    @classmethod
+    def add_implicit_resolver(cls, tag, regexp, first):
+        if not 'yaml_implicit_resolvers' in cls.__dict__:
+            implicit_resolvers = {}
+            for key in cls.yaml_implicit_resolvers:
+                implicit_resolvers[key] = cls.yaml_implicit_resolvers[key][:]
+            cls.yaml_implicit_resolvers = implicit_resolvers
+        if first is None:
+            first = [None]
+        for ch in first:
+            cls.yaml_implicit_resolvers.setdefault(ch, []).append((tag, regexp))
+
+    @classmethod
+    def add_path_resolver(cls, tag, path, kind=None):
+        # Note: `add_path_resolver` is experimental.  The API could be changed.
+        # `new_path` is a pattern that is matched against the path from the
+        # root to the node that is being considered.  `node_path` elements are
+        # tuples `(node_check, index_check)`.  `node_check` is a node class:
+        # `ScalarNode`, `SequenceNode`, `MappingNode` or `None`.  `None`
+        # matches any kind of a node.  `index_check` could be `None`, a boolean
+        # value, a string value, or a number.  `None` and `False` match against
+        # any _value_ of sequence and mapping nodes.  `True` matches against
+        # any _key_ of a mapping node.  A string `index_check` matches against
+        # a mapping value that corresponds to a scalar key which content is
+        # equal to the `index_check` value.  An integer `index_check` matches
+        # against a sequence value with the index equal to `index_check`.
+        if not 'yaml_path_resolvers' in cls.__dict__:
+            cls.yaml_path_resolvers = cls.yaml_path_resolvers.copy()
+        new_path = []
+        for element in path:
+            if isinstance(element, (list, tuple)):
+                if len(element) == 2:
+                    node_check, index_check = element
+                elif len(element) == 1:
+                    node_check = element[0]
+                    index_check = True
+                else:
+                    raise ResolverError("Invalid path element: %s" % element)
+            else:
+                node_check = None
+                index_check = element
+            if node_check is str:
+                node_check = ScalarNode
+            elif node_check is list:
+                node_check = SequenceNode
+            elif node_check is dict:
+                node_check = MappingNode
+            elif node_check not in [ScalarNode, SequenceNode, MappingNode]  \
+                    and not isinstance(node_check, str) \
+                    and node_check is not None:
+                raise ResolverError("Invalid node checker: %s" % node_check)
+            if not isinstance(index_check, (str, int))  \
+                    and index_check is not None:
+                raise ResolverError("Invalid index checker: %s" % index_check)
+            new_path.append((node_check, index_check))
+        if kind is str:
+            kind = ScalarNode
+        elif kind is list:
+            kind = SequenceNode
+        elif kind is dict:
+            kind = MappingNode
+        elif kind not in [ScalarNode, SequenceNode, MappingNode]    \
+                and kind is not None:
+            raise ResolverError("Invalid node kind: %s" % kind)
+        cls.yaml_path_resolvers[tuple(new_path), kind] = tag
+
+    def descend_resolver(self, current_node, current_index):
+        if not self.yaml_path_resolvers:
+            return
+        exact_paths = {}
+        prefix_paths = []
+        if current_node:
+            depth = len(self.resolver_prefix_paths)
+            for path, kind in self.resolver_prefix_paths[-1]:
+                if self.check_resolver_prefix(depth, path, kind,
+                        current_node, current_index):
+                    if len(path) > depth:
+                        prefix_paths.append((path, kind))
+                    else:
+                        exact_paths[kind] = self.yaml_path_resolvers[path, kind]
+        else:
+            for path, kind in self.yaml_path_resolvers:
+                if not path:
+                    exact_paths[kind] = self.yaml_path_resolvers[path, kind]
+                else:
+                    prefix_paths.append((path, kind))
+        self.resolver_exact_paths.append(exact_paths)
+        self.resolver_prefix_paths.append(prefix_paths)
+
+    def ascend_resolver(self):
+        if not self.yaml_path_resolvers:
+            return
+        self.resolver_exact_paths.pop()
+        self.resolver_prefix_paths.pop()
+
+    def check_resolver_prefix(self, depth, path, kind,
+            current_node, current_index):
+        node_check, index_check = path[depth-1]
+        if isinstance(node_check, str):
+            if current_node.tag != node_check:
+                return
+        elif node_check is not None:
+            if not isinstance(current_node, node_check):
+                return
+        if index_check is True and current_index is not None:
+            return
+        if (index_check is False or index_check is None)    \
+                and current_index is None:
+            return
+        if isinstance(index_check, str):
+            if not (isinstance(current_index, ScalarNode)
+                    and index_check == current_index.value):
+                return
+        elif isinstance(index_check, int) and not isinstance(index_check, bool):
+            if index_check != current_index:
+                return
+        return True
+
+    def resolve(self, kind, value, implicit):
+        if kind is ScalarNode and implicit[0]:
+            if value == '':
+                resolvers = self.yaml_implicit_resolvers.get('', [])
+            else:
+                resolvers = self.yaml_implicit_resolvers.get(value[0], [])
+            resolvers += self.yaml_implicit_resolvers.get(None, [])
+            for tag, regexp in resolvers:
+                if regexp.match(value):
+                    return tag
+            implicit = implicit[1]
+        if self.yaml_path_resolvers:
+            exact_paths = self.resolver_exact_paths[-1]
+            if kind in exact_paths:
+                return exact_paths[kind]
+            if None in exact_paths:
+                return exact_paths[None]
+        if kind is ScalarNode:
+            return self.DEFAULT_SCALAR_TAG
+        elif kind is SequenceNode:
+            return self.DEFAULT_SEQUENCE_TAG
+        elif kind is MappingNode:
+            return self.DEFAULT_MAPPING_TAG
+
+class Resolver(BaseResolver):
+    pass
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:bool',
+        re.compile(r'''^(?:yes|Yes|YES|no|No|NO
+                    |true|True|TRUE|false|False|FALSE
+                    |on|On|ON|off|Off|OFF)$''', re.X),
+        list('yYnNtTfFoO'))
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:float',
+        re.compile(r'''^(?:[-+]?(?:[0-9][0-9_]*)\.[0-9_]*(?:[eE][-+][0-9]+)?
+                    |\.[0-9_]+(?:[eE][-+][0-9]+)?
+                    |[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\.[0-9_]*
+                    |[-+]?\.(?:inf|Inf|INF)
+                    |\.(?:nan|NaN|NAN))$''', re.X),
+        list('-+0123456789.'))
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:int',
+        re.compile(r'''^(?:[-+]?0b[0-1_]+
+                    |[-+]?0[0-7_]+
+                    |[-+]?(?:0|[1-9][0-9_]*)
+                    |[-+]?0x[0-9a-fA-F_]+
+                    |[-+]?[1-9][0-9_]*(?::[0-5]?[0-9])+)$''', re.X),
+        list('-+0123456789'))
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:merge',
+        re.compile(r'^(?:<<)$'),
+        ['<'])
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:null',
+        re.compile(r'''^(?: ~
+                    |null|Null|NULL
+                    | )$''', re.X),
+        ['~', 'n', 'N', ''])
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:timestamp',
+        re.compile(r'''^(?:[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]
+                    |[0-9][0-9][0-9][0-9] -[0-9][0-9]? -[0-9][0-9]?
+                     (?:[Tt]|[ \t]+)[0-9][0-9]?
+                     :[0-9][0-9] :[0-9][0-9] (?:\.[0-9]*)?
+                     (?:[ \t]*(?:Z|[-+][0-9][0-9]?(?::[0-9][0-9])?))?)$''', re.X),
+        list('0123456789'))
+
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:value',
+        re.compile(r'^(?:=)$'),
+        ['='])
+
+# The following resolver is only for documentation purposes. It cannot work
+# because plain scalars cannot start with '!', '&', or '*'.
+Resolver.add_implicit_resolver(
+        'tag:yaml.org,2002:yaml',
+        re.compile(r'^(?:!|&|\*)$'),
+        list('!&*'))
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/scanner.py b/python3-vckonline/lib/python3.8/site-packages/yaml/scanner.py
new file mode 100644
index 0000000..7437ede
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/scanner.py
@@ -0,0 +1,1435 @@
+
+# Scanner produces tokens of the following types:
+# STREAM-START
+# STREAM-END
+# DIRECTIVE(name, value)
+# DOCUMENT-START
+# DOCUMENT-END
+# BLOCK-SEQUENCE-START
+# BLOCK-MAPPING-START
+# BLOCK-END
+# FLOW-SEQUENCE-START
+# FLOW-MAPPING-START
+# FLOW-SEQUENCE-END
+# FLOW-MAPPING-END
+# BLOCK-ENTRY
+# FLOW-ENTRY
+# KEY
+# VALUE
+# ALIAS(value)
+# ANCHOR(value)
+# TAG(value)
+# SCALAR(value, plain, style)
+#
+# Read comments in the Scanner code for more details.
+#
+
+__all__ = ['Scanner', 'ScannerError']
+
+from .error import MarkedYAMLError
+from .tokens import *
+
+class ScannerError(MarkedYAMLError):
+    pass
+
+class SimpleKey:
+    # See below simple keys treatment.
+
+    def __init__(self, token_number, required, index, line, column, mark):
+        self.token_number = token_number
+        self.required = required
+        self.index = index
+        self.line = line
+        self.column = column
+        self.mark = mark
+
+class Scanner:
+
+    def __init__(self):
+        """Initialize the scanner."""
+        # It is assumed that Scanner and Reader will have a common descendant.
+        # Reader do the dirty work of checking for BOM and converting the
+        # input data to Unicode. It also adds NUL to the end.
+        #
+        # Reader supports the following methods
+        #   self.peek(i=0)       # peek the next i-th character
+        #   self.prefix(l=1)     # peek the next l characters
+        #   self.forward(l=1)    # read the next l characters and move the pointer.
+
+        # Had we reached the end of the stream?
+        self.done = False
+
+        # The number of unclosed '{' and '['. `flow_level == 0` means block
+        # context.
+        self.flow_level = 0
+
+        # List of processed tokens that are not yet emitted.
+        self.tokens = []
+
+        # Add the STREAM-START token.
+        self.fetch_stream_start()
+
+        # Number of tokens that were emitted through the `get_token` method.
+        self.tokens_taken = 0
+
+        # The current indentation level.
+        self.indent = -1
+
+        # Past indentation levels.
+        self.indents = []
+
+        # Variables related to simple keys treatment.
+
+        # A simple key is a key that is not denoted by the '?' indicator.
+        # Example of simple keys:
+        #   ---
+        #   block simple key: value
+        #   ? not a simple key:
+        #   : { flow simple key: value }
+        # We emit the KEY token before all keys, so when we find a potential
+        # simple key, we try to locate the corresponding ':' indicator.
+        # Simple keys should be limited to a single line and 1024 characters.
+
+        # Can a simple key start at the current position? A simple key may
+        # start:
+        # - at the beginning of the line, not counting indentation spaces
+        #       (in block context),
+        # - after '{', '[', ',' (in the flow context),
+        # - after '?', ':', '-' (in the block context).
+        # In the block context, this flag also signifies if a block collection
+        # may start at the current position.
+        self.allow_simple_key = True
+
+        # Keep track of possible simple keys. This is a dictionary. The key
+        # is `flow_level`; there can be no more that one possible simple key
+        # for each level. The value is a SimpleKey record:
+        #   (token_number, required, index, line, column, mark)
+        # A simple key may start with ALIAS, ANCHOR, TAG, SCALAR(flow),
+        # '[', or '{' tokens.
+        self.possible_simple_keys = {}
+
+    # Public methods.
+
+    def check_token(self, *choices):
+        # Check if the next token is one of the given types.
+        while self.need_more_tokens():
+            self.fetch_more_tokens()
+        if self.tokens:
+            if not choices:
+                return True
+            for choice in choices:
+                if isinstance(self.tokens[0], choice):
+                    return True
+        return False
+
+    def peek_token(self):
+        # Return the next token, but do not delete if from the queue.
+        # Return None if no more tokens.
+        while self.need_more_tokens():
+            self.fetch_more_tokens()
+        if self.tokens:
+            return self.tokens[0]
+        else:
+            return None
+
+    def get_token(self):
+        # Return the next token.
+        while self.need_more_tokens():
+            self.fetch_more_tokens()
+        if self.tokens:
+            self.tokens_taken += 1
+            return self.tokens.pop(0)
+
+    # Private methods.
+
+    def need_more_tokens(self):
+        if self.done:
+            return False
+        if not self.tokens:
+            return True
+        # The current token may be a potential simple key, so we
+        # need to look further.
+        self.stale_possible_simple_keys()
+        if self.next_possible_simple_key() == self.tokens_taken:
+            return True
+
+    def fetch_more_tokens(self):
+
+        # Eat whitespaces and comments until we reach the next token.
+        self.scan_to_next_token()
+
+        # Remove obsolete possible simple keys.
+        self.stale_possible_simple_keys()
+
+        # Compare the current indentation and column. It may add some tokens
+        # and decrease the current indentation level.
+        self.unwind_indent(self.column)
+
+        # Peek the next character.
+        ch = self.peek()
+
+        # Is it the end of stream?
+        if ch == '\0':
+            return self.fetch_stream_end()
+
+        # Is it a directive?
+        if ch == '%' and self.check_directive():
+            return self.fetch_directive()
+
+        # Is it the document start?
+        if ch == '-' and self.check_document_start():
+            return self.fetch_document_start()
+
+        # Is it the document end?
+        if ch == '.' and self.check_document_end():
+            return self.fetch_document_end()
+
+        # TODO: support for BOM within a stream.
+        #if ch == '\uFEFF':
+        #    return self.fetch_bom()    <-- issue BOMToken
+
+        # Note: the order of the following checks is NOT significant.
+
+        # Is it the flow sequence start indicator?
+        if ch == '[':
+            return self.fetch_flow_sequence_start()
+
+        # Is it the flow mapping start indicator?
+        if ch == '{':
+            return self.fetch_flow_mapping_start()
+
+        # Is it the flow sequence end indicator?
+        if ch == ']':
+            return self.fetch_flow_sequence_end()
+
+        # Is it the flow mapping end indicator?
+        if ch == '}':
+            return self.fetch_flow_mapping_end()
+
+        # Is it the flow entry indicator?
+        if ch == ',':
+            return self.fetch_flow_entry()
+
+        # Is it the block entry indicator?
+        if ch == '-' and self.check_block_entry():
+            return self.fetch_block_entry()
+
+        # Is it the key indicator?
+        if ch == '?' and self.check_key():
+            return self.fetch_key()
+
+        # Is it the value indicator?
+        if ch == ':' and self.check_value():
+            return self.fetch_value()
+
+        # Is it an alias?
+        if ch == '*':
+            return self.fetch_alias()
+
+        # Is it an anchor?
+        if ch == '&':
+            return self.fetch_anchor()
+
+        # Is it a tag?
+        if ch == '!':
+            return self.fetch_tag()
+
+        # Is it a literal scalar?
+        if ch == '|' and not self.flow_level:
+            return self.fetch_literal()
+
+        # Is it a folded scalar?
+        if ch == '>' and not self.flow_level:
+            return self.fetch_folded()
+
+        # Is it a single quoted scalar?
+        if ch == '\'':
+            return self.fetch_single()
+
+        # Is it a double quoted scalar?
+        if ch == '\"':
+            return self.fetch_double()
+
+        # It must be a plain scalar then.
+        if self.check_plain():
+            return self.fetch_plain()
+
+        # No? It's an error. Let's produce a nice error message.
+        raise ScannerError("while scanning for the next token", None,
+                "found character %r that cannot start any token" % ch,
+                self.get_mark())
+
+    # Simple keys treatment.
+
+    def next_possible_simple_key(self):
+        # Return the number of the nearest possible simple key. Actually we
+        # don't need to loop through the whole dictionary. We may replace it
+        # with the following code:
+        #   if not self.possible_simple_keys:
+        #       return None
+        #   return self.possible_simple_keys[
+        #           min(self.possible_simple_keys.keys())].token_number
+        min_token_number = None
+        for level in self.possible_simple_keys:
+            key = self.possible_simple_keys[level]
+            if min_token_number is None or key.token_number < min_token_number:
+                min_token_number = key.token_number
+        return min_token_number
+
+    def stale_possible_simple_keys(self):
+        # Remove entries that are no longer possible simple keys. According to
+        # the YAML specification, simple keys
+        # - should be limited to a single line,
+        # - should be no longer than 1024 characters.
+        # Disabling this procedure will allow simple keys of any length and
+        # height (may cause problems if indentation is broken though).
+        for level in list(self.possible_simple_keys):
+            key = self.possible_simple_keys[level]
+            if key.line != self.line  \
+                    or self.index-key.index > 1024:
+                if key.required:
+                    raise ScannerError("while scanning a simple key", key.mark,
+                            "could not find expected ':'", self.get_mark())
+                del self.possible_simple_keys[level]
+
+    def save_possible_simple_key(self):
+        # The next token may start a simple key. We check if it's possible
+        # and save its position. This function is called for
+        #   ALIAS, ANCHOR, TAG, SCALAR(flow), '[', and '{'.
+
+        # Check if a simple key is required at the current position.
+        required = not self.flow_level and self.indent == self.column
+
+        # The next token might be a simple key. Let's save it's number and
+        # position.
+        if self.allow_simple_key:
+            self.remove_possible_simple_key()
+            token_number = self.tokens_taken+len(self.tokens)
+            key = SimpleKey(token_number, required,
+                    self.index, self.line, self.column, self.get_mark())
+            self.possible_simple_keys[self.flow_level] = key
+
+    def remove_possible_simple_key(self):
+        # Remove the saved possible key position at the current flow level.
+        if self.flow_level in self.possible_simple_keys:
+            key = self.possible_simple_keys[self.flow_level]
+            
+            if key.required:
+                raise ScannerError("while scanning a simple key", key.mark,
+                        "could not find expected ':'", self.get_mark())
+
+            del self.possible_simple_keys[self.flow_level]
+
+    # Indentation functions.
+
+    def unwind_indent(self, column):
+
+        ## In flow context, tokens should respect indentation.
+        ## Actually the condition should be `self.indent >= column` according to
+        ## the spec. But this condition will prohibit intuitively correct
+        ## constructions such as
+        ## key : {
+        ## }
+        #if self.flow_level and self.indent > column:
+        #    raise ScannerError(None, None,
+        #            "invalid indentation or unclosed '[' or '{'",
+        #            self.get_mark())
+
+        # In the flow context, indentation is ignored. We make the scanner less
+        # restrictive then specification requires.
+        if self.flow_level:
+            return
+
+        # In block context, we may need to issue the BLOCK-END tokens.
+        while self.indent > column:
+            mark = self.get_mark()
+            self.indent = self.indents.pop()
+            self.tokens.append(BlockEndToken(mark, mark))
+
+    def add_indent(self, column):
+        # Check if we need to increase indentation.
+        if self.indent < column:
+            self.indents.append(self.indent)
+            self.indent = column
+            return True
+        return False
+
+    # Fetchers.
+
+    def fetch_stream_start(self):
+        # We always add STREAM-START as the first token and STREAM-END as the
+        # last token.
+
+        # Read the token.
+        mark = self.get_mark()
+        
+        # Add STREAM-START.
+        self.tokens.append(StreamStartToken(mark, mark,
+            encoding=self.encoding))
+        
+
+    def fetch_stream_end(self):
+
+        # Set the current indentation to -1.
+        self.unwind_indent(-1)
+
+        # Reset simple keys.
+        self.remove_possible_simple_key()
+        self.allow_simple_key = False
+        self.possible_simple_keys = {}
+
+        # Read the token.
+        mark = self.get_mark()
+        
+        # Add STREAM-END.
+        self.tokens.append(StreamEndToken(mark, mark))
+
+        # The steam is finished.
+        self.done = True
+
+    def fetch_directive(self):
+        
+        # Set the current indentation to -1.
+        self.unwind_indent(-1)
+
+        # Reset simple keys.
+        self.remove_possible_simple_key()
+        self.allow_simple_key = False
+
+        # Scan and add DIRECTIVE.
+        self.tokens.append(self.scan_directive())
+
+    def fetch_document_start(self):
+        self.fetch_document_indicator(DocumentStartToken)
+
+    def fetch_document_end(self):
+        self.fetch_document_indicator(DocumentEndToken)
+
+    def fetch_document_indicator(self, TokenClass):
+
+        # Set the current indentation to -1.
+        self.unwind_indent(-1)
+
+        # Reset simple keys. Note that there could not be a block collection
+        # after '---'.
+        self.remove_possible_simple_key()
+        self.allow_simple_key = False
+
+        # Add DOCUMENT-START or DOCUMENT-END.
+        start_mark = self.get_mark()
+        self.forward(3)
+        end_mark = self.get_mark()
+        self.tokens.append(TokenClass(start_mark, end_mark))
+
+    def fetch_flow_sequence_start(self):
+        self.fetch_flow_collection_start(FlowSequenceStartToken)
+
+    def fetch_flow_mapping_start(self):
+        self.fetch_flow_collection_start(FlowMappingStartToken)
+
+    def fetch_flow_collection_start(self, TokenClass):
+
+        # '[' and '{' may start a simple key.
+        self.save_possible_simple_key()
+
+        # Increase the flow level.
+        self.flow_level += 1
+
+        # Simple keys are allowed after '[' and '{'.
+        self.allow_simple_key = True
+
+        # Add FLOW-SEQUENCE-START or FLOW-MAPPING-START.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(TokenClass(start_mark, end_mark))
+
+    def fetch_flow_sequence_end(self):
+        self.fetch_flow_collection_end(FlowSequenceEndToken)
+
+    def fetch_flow_mapping_end(self):
+        self.fetch_flow_collection_end(FlowMappingEndToken)
+
+    def fetch_flow_collection_end(self, TokenClass):
+
+        # Reset possible simple key on the current level.
+        self.remove_possible_simple_key()
+
+        # Decrease the flow level.
+        self.flow_level -= 1
+
+        # No simple keys after ']' or '}'.
+        self.allow_simple_key = False
+
+        # Add FLOW-SEQUENCE-END or FLOW-MAPPING-END.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(TokenClass(start_mark, end_mark))
+
+    def fetch_flow_entry(self):
+
+        # Simple keys are allowed after ','.
+        self.allow_simple_key = True
+
+        # Reset possible simple key on the current level.
+        self.remove_possible_simple_key()
+
+        # Add FLOW-ENTRY.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(FlowEntryToken(start_mark, end_mark))
+
+    def fetch_block_entry(self):
+
+        # Block context needs additional checks.
+        if not self.flow_level:
+
+            # Are we allowed to start a new entry?
+            if not self.allow_simple_key:
+                raise ScannerError(None, None,
+                        "sequence entries are not allowed here",
+                        self.get_mark())
+
+            # We may need to add BLOCK-SEQUENCE-START.
+            if self.add_indent(self.column):
+                mark = self.get_mark()
+                self.tokens.append(BlockSequenceStartToken(mark, mark))
+
+        # It's an error for the block entry to occur in the flow context,
+        # but we let the parser detect this.
+        else:
+            pass
+
+        # Simple keys are allowed after '-'.
+        self.allow_simple_key = True
+
+        # Reset possible simple key on the current level.
+        self.remove_possible_simple_key()
+
+        # Add BLOCK-ENTRY.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(BlockEntryToken(start_mark, end_mark))
+
+    def fetch_key(self):
+        
+        # Block context needs additional checks.
+        if not self.flow_level:
+
+            # Are we allowed to start a key (not necessary a simple)?
+            if not self.allow_simple_key:
+                raise ScannerError(None, None,
+                        "mapping keys are not allowed here",
+                        self.get_mark())
+
+            # We may need to add BLOCK-MAPPING-START.
+            if self.add_indent(self.column):
+                mark = self.get_mark()
+                self.tokens.append(BlockMappingStartToken(mark, mark))
+
+        # Simple keys are allowed after '?' in the block context.
+        self.allow_simple_key = not self.flow_level
+
+        # Reset possible simple key on the current level.
+        self.remove_possible_simple_key()
+
+        # Add KEY.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(KeyToken(start_mark, end_mark))
+
+    def fetch_value(self):
+
+        # Do we determine a simple key?
+        if self.flow_level in self.possible_simple_keys:
+
+            # Add KEY.
+            key = self.possible_simple_keys[self.flow_level]
+            del self.possible_simple_keys[self.flow_level]
+            self.tokens.insert(key.token_number-self.tokens_taken,
+                    KeyToken(key.mark, key.mark))
+
+            # If this key starts a new block mapping, we need to add
+            # BLOCK-MAPPING-START.
+            if not self.flow_level:
+                if self.add_indent(key.column):
+                    self.tokens.insert(key.token_number-self.tokens_taken,
+                            BlockMappingStartToken(key.mark, key.mark))
+
+            # There cannot be two simple keys one after another.
+            self.allow_simple_key = False
+
+        # It must be a part of a complex key.
+        else:
+            
+            # Block context needs additional checks.
+            # (Do we really need them? They will be caught by the parser
+            # anyway.)
+            if not self.flow_level:
+
+                # We are allowed to start a complex value if and only if
+                # we can start a simple key.
+                if not self.allow_simple_key:
+                    raise ScannerError(None, None,
+                            "mapping values are not allowed here",
+                            self.get_mark())
+
+            # If this value starts a new block mapping, we need to add
+            # BLOCK-MAPPING-START.  It will be detected as an error later by
+            # the parser.
+            if not self.flow_level:
+                if self.add_indent(self.column):
+                    mark = self.get_mark()
+                    self.tokens.append(BlockMappingStartToken(mark, mark))
+
+            # Simple keys are allowed after ':' in the block context.
+            self.allow_simple_key = not self.flow_level
+
+            # Reset possible simple key on the current level.
+            self.remove_possible_simple_key()
+
+        # Add VALUE.
+        start_mark = self.get_mark()
+        self.forward()
+        end_mark = self.get_mark()
+        self.tokens.append(ValueToken(start_mark, end_mark))
+
+    def fetch_alias(self):
+
+        # ALIAS could be a simple key.
+        self.save_possible_simple_key()
+
+        # No simple keys after ALIAS.
+        self.allow_simple_key = False
+
+        # Scan and add ALIAS.
+        self.tokens.append(self.scan_anchor(AliasToken))
+
+    def fetch_anchor(self):
+
+        # ANCHOR could start a simple key.
+        self.save_possible_simple_key()
+
+        # No simple keys after ANCHOR.
+        self.allow_simple_key = False
+
+        # Scan and add ANCHOR.
+        self.tokens.append(self.scan_anchor(AnchorToken))
+
+    def fetch_tag(self):
+
+        # TAG could start a simple key.
+        self.save_possible_simple_key()
+
+        # No simple keys after TAG.
+        self.allow_simple_key = False
+
+        # Scan and add TAG.
+        self.tokens.append(self.scan_tag())
+
+    def fetch_literal(self):
+        self.fetch_block_scalar(style='|')
+
+    def fetch_folded(self):
+        self.fetch_block_scalar(style='>')
+
+    def fetch_block_scalar(self, style):
+
+        # A simple key may follow a block scalar.
+        self.allow_simple_key = True
+
+        # Reset possible simple key on the current level.
+        self.remove_possible_simple_key()
+
+        # Scan and add SCALAR.
+        self.tokens.append(self.scan_block_scalar(style))
+
+    def fetch_single(self):
+        self.fetch_flow_scalar(style='\'')
+
+    def fetch_double(self):
+        self.fetch_flow_scalar(style='"')
+
+    def fetch_flow_scalar(self, style):
+
+        # A flow scalar could be a simple key.
+        self.save_possible_simple_key()
+
+        # No simple keys after flow scalars.
+        self.allow_simple_key = False
+
+        # Scan and add SCALAR.
+        self.tokens.append(self.scan_flow_scalar(style))
+
+    def fetch_plain(self):
+
+        # A plain scalar could be a simple key.
+        self.save_possible_simple_key()
+
+        # No simple keys after plain scalars. But note that `scan_plain` will
+        # change this flag if the scan is finished at the beginning of the
+        # line.
+        self.allow_simple_key = False
+
+        # Scan and add SCALAR. May change `allow_simple_key`.
+        self.tokens.append(self.scan_plain())
+
+    # Checkers.
+
+    def check_directive(self):
+
+        # DIRECTIVE:        ^ '%' ...
+        # The '%' indicator is already checked.
+        if self.column == 0:
+            return True
+
+    def check_document_start(self):
+
+        # DOCUMENT-START:   ^ '---' (' '|'\n')
+        if self.column == 0:
+            if self.prefix(3) == '---'  \
+                    and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
+                return True
+
+    def check_document_end(self):
+
+        # DOCUMENT-END:     ^ '...' (' '|'\n')
+        if self.column == 0:
+            if self.prefix(3) == '...'  \
+                    and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
+                return True
+
+    def check_block_entry(self):
+
+        # BLOCK-ENTRY:      '-' (' '|'\n')
+        return self.peek(1) in '\0 \t\r\n\x85\u2028\u2029'
+
+    def check_key(self):
+
+        # KEY(flow context):    '?'
+        if self.flow_level:
+            return True
+
+        # KEY(block context):   '?' (' '|'\n')
+        else:
+            return self.peek(1) in '\0 \t\r\n\x85\u2028\u2029'
+
+    def check_value(self):
+
+        # VALUE(flow context):  ':'
+        if self.flow_level:
+            return True
+
+        # VALUE(block context): ':' (' '|'\n')
+        else:
+            return self.peek(1) in '\0 \t\r\n\x85\u2028\u2029'
+
+    def check_plain(self):
+
+        # A plain scalar may start with any non-space character except:
+        #   '-', '?', ':', ',', '[', ']', '{', '}',
+        #   '#', '&', '*', '!', '|', '>', '\'', '\"',
+        #   '%', '@', '`'.
+        #
+        # It may also start with
+        #   '-', '?', ':'
+        # if it is followed by a non-space character.
+        #
+        # Note that we limit the last rule to the block context (except the
+        # '-' character) because we want the flow context to be space
+        # independent.
+        ch = self.peek()
+        return ch not in '\0 \t\r\n\x85\u2028\u2029-?:,[]{}#&*!|>\'\"%@`'  \
+                or (self.peek(1) not in '\0 \t\r\n\x85\u2028\u2029'
+                        and (ch == '-' or (not self.flow_level and ch in '?:')))
+
+    # Scanners.
+
+    def scan_to_next_token(self):
+        # We ignore spaces, line breaks and comments.
+        # If we find a line break in the block context, we set the flag
+        # `allow_simple_key` on.
+        # The byte order mark is stripped if it's the first character in the
+        # stream. We do not yet support BOM inside the stream as the
+        # specification requires. Any such mark will be considered as a part
+        # of the document.
+        #
+        # TODO: We need to make tab handling rules more sane. A good rule is
+        #   Tabs cannot precede tokens
+        #   BLOCK-SEQUENCE-START, BLOCK-MAPPING-START, BLOCK-END,
+        #   KEY(block), VALUE(block), BLOCK-ENTRY
+        # So the checking code is
+        #   if <TAB>:
+        #       self.allow_simple_keys = False
+        # We also need to add the check for `allow_simple_keys == True` to
+        # `unwind_indent` before issuing BLOCK-END.
+        # Scanners for block, flow, and plain scalars need to be modified.
+
+        if self.index == 0 and self.peek() == '\uFEFF':
+            self.forward()
+        found = False
+        while not found:
+            while self.peek() == ' ':
+                self.forward()
+            if self.peek() == '#':
+                while self.peek() not in '\0\r\n\x85\u2028\u2029':
+                    self.forward()
+            if self.scan_line_break():
+                if not self.flow_level:
+                    self.allow_simple_key = True
+            else:
+                found = True
+
+    def scan_directive(self):
+        # See the specification for details.
+        start_mark = self.get_mark()
+        self.forward()
+        name = self.scan_directive_name(start_mark)
+        value = None
+        if name == 'YAML':
+            value = self.scan_yaml_directive_value(start_mark)
+            end_mark = self.get_mark()
+        elif name == 'TAG':
+            value = self.scan_tag_directive_value(start_mark)
+            end_mark = self.get_mark()
+        else:
+            end_mark = self.get_mark()
+            while self.peek() not in '\0\r\n\x85\u2028\u2029':
+                self.forward()
+        self.scan_directive_ignored_line(start_mark)
+        return DirectiveToken(name, value, start_mark, end_mark)
+
+    def scan_directive_name(self, start_mark):
+        # See the specification for details.
+        length = 0
+        ch = self.peek(length)
+        while '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
+                or ch in '-_':
+            length += 1
+            ch = self.peek(length)
+        if not length:
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected alphabetic or numeric character, but found %r"
+                    % ch, self.get_mark())
+        value = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch not in '\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected alphabetic or numeric character, but found %r"
+                    % ch, self.get_mark())
+        return value
+
+    def scan_yaml_directive_value(self, start_mark):
+        # See the specification for details.
+        while self.peek() == ' ':
+            self.forward()
+        major = self.scan_yaml_directive_number(start_mark)
+        if self.peek() != '.':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected a digit or '.', but found %r" % self.peek(),
+                    self.get_mark())
+        self.forward()
+        minor = self.scan_yaml_directive_number(start_mark)
+        if self.peek() not in '\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected a digit or ' ', but found %r" % self.peek(),
+                    self.get_mark())
+        return (major, minor)
+
+    def scan_yaml_directive_number(self, start_mark):
+        # See the specification for details.
+        ch = self.peek()
+        if not ('0' <= ch <= '9'):
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected a digit, but found %r" % ch, self.get_mark())
+        length = 0
+        while '0' <= self.peek(length) <= '9':
+            length += 1
+        value = int(self.prefix(length))
+        self.forward(length)
+        return value
+
+    def scan_tag_directive_value(self, start_mark):
+        # See the specification for details.
+        while self.peek() == ' ':
+            self.forward()
+        handle = self.scan_tag_directive_handle(start_mark)
+        while self.peek() == ' ':
+            self.forward()
+        prefix = self.scan_tag_directive_prefix(start_mark)
+        return (handle, prefix)
+
+    def scan_tag_directive_handle(self, start_mark):
+        # See the specification for details.
+        value = self.scan_tag_handle('directive', start_mark)
+        ch = self.peek()
+        if ch != ' ':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected ' ', but found %r" % ch, self.get_mark())
+        return value
+
+    def scan_tag_directive_prefix(self, start_mark):
+        # See the specification for details.
+        value = self.scan_tag_uri('directive', start_mark)
+        ch = self.peek()
+        if ch not in '\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected ' ', but found %r" % ch, self.get_mark())
+        return value
+
+    def scan_directive_ignored_line(self, start_mark):
+        # See the specification for details.
+        while self.peek() == ' ':
+            self.forward()
+        if self.peek() == '#':
+            while self.peek() not in '\0\r\n\x85\u2028\u2029':
+                self.forward()
+        ch = self.peek()
+        if ch not in '\0\r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a directive", start_mark,
+                    "expected a comment or a line break, but found %r"
+                        % ch, self.get_mark())
+        self.scan_line_break()
+
+    def scan_anchor(self, TokenClass):
+        # The specification does not restrict characters for anchors and
+        # aliases. This may lead to problems, for instance, the document:
+        #   [ *alias, value ]
+        # can be interpreted in two ways, as
+        #   [ "value" ]
+        # and
+        #   [ *alias , "value" ]
+        # Therefore we restrict aliases to numbers and ASCII letters.
+        start_mark = self.get_mark()
+        indicator = self.peek()
+        if indicator == '*':
+            name = 'alias'
+        else:
+            name = 'anchor'
+        self.forward()
+        length = 0
+        ch = self.peek(length)
+        while '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
+                or ch in '-_':
+            length += 1
+            ch = self.peek(length)
+        if not length:
+            raise ScannerError("while scanning an %s" % name, start_mark,
+                    "expected alphabetic or numeric character, but found %r"
+                    % ch, self.get_mark())
+        value = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch not in '\0 \t\r\n\x85\u2028\u2029?:,]}%@`':
+            raise ScannerError("while scanning an %s" % name, start_mark,
+                    "expected alphabetic or numeric character, but found %r"
+                    % ch, self.get_mark())
+        end_mark = self.get_mark()
+        return TokenClass(value, start_mark, end_mark)
+
+    def scan_tag(self):
+        # See the specification for details.
+        start_mark = self.get_mark()
+        ch = self.peek(1)
+        if ch == '<':
+            handle = None
+            self.forward(2)
+            suffix = self.scan_tag_uri('tag', start_mark)
+            if self.peek() != '>':
+                raise ScannerError("while parsing a tag", start_mark,
+                        "expected '>', but found %r" % self.peek(),
+                        self.get_mark())
+            self.forward()
+        elif ch in '\0 \t\r\n\x85\u2028\u2029':
+            handle = None
+            suffix = '!'
+            self.forward()
+        else:
+            length = 1
+            use_handle = False
+            while ch not in '\0 \r\n\x85\u2028\u2029':
+                if ch == '!':
+                    use_handle = True
+                    break
+                length += 1
+                ch = self.peek(length)
+            handle = '!'
+            if use_handle:
+                handle = self.scan_tag_handle('tag', start_mark)
+            else:
+                handle = '!'
+                self.forward()
+            suffix = self.scan_tag_uri('tag', start_mark)
+        ch = self.peek()
+        if ch not in '\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a tag", start_mark,
+                    "expected ' ', but found %r" % ch, self.get_mark())
+        value = (handle, suffix)
+        end_mark = self.get_mark()
+        return TagToken(value, start_mark, end_mark)
+
+    def scan_block_scalar(self, style):
+        # See the specification for details.
+
+        if style == '>':
+            folded = True
+        else:
+            folded = False
+
+        chunks = []
+        start_mark = self.get_mark()
+
+        # Scan the header.
+        self.forward()
+        chomping, increment = self.scan_block_scalar_indicators(start_mark)
+        self.scan_block_scalar_ignored_line(start_mark)
+
+        # Determine the indentation level and go to the first non-empty line.
+        min_indent = self.indent+1
+        if min_indent < 1:
+            min_indent = 1
+        if increment is None:
+            breaks, max_indent, end_mark = self.scan_block_scalar_indentation()
+            indent = max(min_indent, max_indent)
+        else:
+            indent = min_indent+increment-1
+            breaks, end_mark = self.scan_block_scalar_breaks(indent)
+        line_break = ''
+
+        # Scan the inner part of the block scalar.
+        while self.column == indent and self.peek() != '\0':
+            chunks.extend(breaks)
+            leading_non_space = self.peek() not in ' \t'
+            length = 0
+            while self.peek(length) not in '\0\r\n\x85\u2028\u2029':
+                length += 1
+            chunks.append(self.prefix(length))
+            self.forward(length)
+            line_break = self.scan_line_break()
+            breaks, end_mark = self.scan_block_scalar_breaks(indent)
+            if self.column == indent and self.peek() != '\0':
+
+                # Unfortunately, folding rules are ambiguous.
+                #
+                # This is the folding according to the specification:
+                
+                if folded and line_break == '\n'    \
+                        and leading_non_space and self.peek() not in ' \t':
+                    if not breaks:
+                        chunks.append(' ')
+                else:
+                    chunks.append(line_break)
+                
+                # This is Clark Evans's interpretation (also in the spec
+                # examples):
+                #
+                #if folded and line_break == '\n':
+                #    if not breaks:
+                #        if self.peek() not in ' \t':
+                #            chunks.append(' ')
+                #        else:
+                #            chunks.append(line_break)
+                #else:
+                #    chunks.append(line_break)
+            else:
+                break
+
+        # Chomp the tail.
+        if chomping is not False:
+            chunks.append(line_break)
+        if chomping is True:
+            chunks.extend(breaks)
+
+        # We are done.
+        return ScalarToken(''.join(chunks), False, start_mark, end_mark,
+                style)
+
+    def scan_block_scalar_indicators(self, start_mark):
+        # See the specification for details.
+        chomping = None
+        increment = None
+        ch = self.peek()
+        if ch in '+-':
+            if ch == '+':
+                chomping = True
+            else:
+                chomping = False
+            self.forward()
+            ch = self.peek()
+            if ch in '0123456789':
+                increment = int(ch)
+                if increment == 0:
+                    raise ScannerError("while scanning a block scalar", start_mark,
+                            "expected indentation indicator in the range 1-9, but found 0",
+                            self.get_mark())
+                self.forward()
+        elif ch in '0123456789':
+            increment = int(ch)
+            if increment == 0:
+                raise ScannerError("while scanning a block scalar", start_mark,
+                        "expected indentation indicator in the range 1-9, but found 0",
+                        self.get_mark())
+            self.forward()
+            ch = self.peek()
+            if ch in '+-':
+                if ch == '+':
+                    chomping = True
+                else:
+                    chomping = False
+                self.forward()
+        ch = self.peek()
+        if ch not in '\0 \r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a block scalar", start_mark,
+                    "expected chomping or indentation indicators, but found %r"
+                    % ch, self.get_mark())
+        return chomping, increment
+
+    def scan_block_scalar_ignored_line(self, start_mark):
+        # See the specification for details.
+        while self.peek() == ' ':
+            self.forward()
+        if self.peek() == '#':
+            while self.peek() not in '\0\r\n\x85\u2028\u2029':
+                self.forward()
+        ch = self.peek()
+        if ch not in '\0\r\n\x85\u2028\u2029':
+            raise ScannerError("while scanning a block scalar", start_mark,
+                    "expected a comment or a line break, but found %r" % ch,
+                    self.get_mark())
+        self.scan_line_break()
+
+    def scan_block_scalar_indentation(self):
+        # See the specification for details.
+        chunks = []
+        max_indent = 0
+        end_mark = self.get_mark()
+        while self.peek() in ' \r\n\x85\u2028\u2029':
+            if self.peek() != ' ':
+                chunks.append(self.scan_line_break())
+                end_mark = self.get_mark()
+            else:
+                self.forward()
+                if self.column > max_indent:
+                    max_indent = self.column
+        return chunks, max_indent, end_mark
+
+    def scan_block_scalar_breaks(self, indent):
+        # See the specification for details.
+        chunks = []
+        end_mark = self.get_mark()
+        while self.column < indent and self.peek() == ' ':
+            self.forward()
+        while self.peek() in '\r\n\x85\u2028\u2029':
+            chunks.append(self.scan_line_break())
+            end_mark = self.get_mark()
+            while self.column < indent and self.peek() == ' ':
+                self.forward()
+        return chunks, end_mark
+
+    def scan_flow_scalar(self, style):
+        # See the specification for details.
+        # Note that we loose indentation rules for quoted scalars. Quoted
+        # scalars don't need to adhere indentation because " and ' clearly
+        # mark the beginning and the end of them. Therefore we are less
+        # restrictive then the specification requires. We only need to check
+        # that document separators are not included in scalars.
+        if style == '"':
+            double = True
+        else:
+            double = False
+        chunks = []
+        start_mark = self.get_mark()
+        quote = self.peek()
+        self.forward()
+        chunks.extend(self.scan_flow_scalar_non_spaces(double, start_mark))
+        while self.peek() != quote:
+            chunks.extend(self.scan_flow_scalar_spaces(double, start_mark))
+            chunks.extend(self.scan_flow_scalar_non_spaces(double, start_mark))
+        self.forward()
+        end_mark = self.get_mark()
+        return ScalarToken(''.join(chunks), False, start_mark, end_mark,
+                style)
+
+    ESCAPE_REPLACEMENTS = {
+        '0':    '\0',
+        'a':    '\x07',
+        'b':    '\x08',
+        't':    '\x09',
+        '\t':   '\x09',
+        'n':    '\x0A',
+        'v':    '\x0B',
+        'f':    '\x0C',
+        'r':    '\x0D',
+        'e':    '\x1B',
+        ' ':    '\x20',
+        '\"':   '\"',
+        '\\':   '\\',
+        '/':    '/',
+        'N':    '\x85',
+        '_':    '\xA0',
+        'L':    '\u2028',
+        'P':    '\u2029',
+    }
+
+    ESCAPE_CODES = {
+        'x':    2,
+        'u':    4,
+        'U':    8,
+    }
+
+    def scan_flow_scalar_non_spaces(self, double, start_mark):
+        # See the specification for details.
+        chunks = []
+        while True:
+            length = 0
+            while self.peek(length) not in '\'\"\\\0 \t\r\n\x85\u2028\u2029':
+                length += 1
+            if length:
+                chunks.append(self.prefix(length))
+                self.forward(length)
+            ch = self.peek()
+            if not double and ch == '\'' and self.peek(1) == '\'':
+                chunks.append('\'')
+                self.forward(2)
+            elif (double and ch == '\'') or (not double and ch in '\"\\'):
+                chunks.append(ch)
+                self.forward()
+            elif double and ch == '\\':
+                self.forward()
+                ch = self.peek()
+                if ch in self.ESCAPE_REPLACEMENTS:
+                    chunks.append(self.ESCAPE_REPLACEMENTS[ch])
+                    self.forward()
+                elif ch in self.ESCAPE_CODES:
+                    length = self.ESCAPE_CODES[ch]
+                    self.forward()
+                    for k in range(length):
+                        if self.peek(k) not in '0123456789ABCDEFabcdef':
+                            raise ScannerError("while scanning a double-quoted scalar", start_mark,
+                                    "expected escape sequence of %d hexdecimal numbers, but found %r" %
+                                        (length, self.peek(k)), self.get_mark())
+                    code = int(self.prefix(length), 16)
+                    chunks.append(chr(code))
+                    self.forward(length)
+                elif ch in '\r\n\x85\u2028\u2029':
+                    self.scan_line_break()
+                    chunks.extend(self.scan_flow_scalar_breaks(double, start_mark))
+                else:
+                    raise ScannerError("while scanning a double-quoted scalar", start_mark,
+                            "found unknown escape character %r" % ch, self.get_mark())
+            else:
+                return chunks
+
+    def scan_flow_scalar_spaces(self, double, start_mark):
+        # See the specification for details.
+        chunks = []
+        length = 0
+        while self.peek(length) in ' \t':
+            length += 1
+        whitespaces = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch == '\0':
+            raise ScannerError("while scanning a quoted scalar", start_mark,
+                    "found unexpected end of stream", self.get_mark())
+        elif ch in '\r\n\x85\u2028\u2029':
+            line_break = self.scan_line_break()
+            breaks = self.scan_flow_scalar_breaks(double, start_mark)
+            if line_break != '\n':
+                chunks.append(line_break)
+            elif not breaks:
+                chunks.append(' ')
+            chunks.extend(breaks)
+        else:
+            chunks.append(whitespaces)
+        return chunks
+
+    def scan_flow_scalar_breaks(self, double, start_mark):
+        # See the specification for details.
+        chunks = []
+        while True:
+            # Instead of checking indentation, we check for document
+            # separators.
+            prefix = self.prefix(3)
+            if (prefix == '---' or prefix == '...')   \
+                    and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
+                raise ScannerError("while scanning a quoted scalar", start_mark,
+                        "found unexpected document separator", self.get_mark())
+            while self.peek() in ' \t':
+                self.forward()
+            if self.peek() in '\r\n\x85\u2028\u2029':
+                chunks.append(self.scan_line_break())
+            else:
+                return chunks
+
+    def scan_plain(self):
+        # See the specification for details.
+        # We add an additional restriction for the flow context:
+        #   plain scalars in the flow context cannot contain ',' or '?'.
+        # We also keep track of the `allow_simple_key` flag here.
+        # Indentation rules are loosed for the flow context.
+        chunks = []
+        start_mark = self.get_mark()
+        end_mark = start_mark
+        indent = self.indent+1
+        # We allow zero indentation for scalars, but then we need to check for
+        # document separators at the beginning of the line.
+        #if indent == 0:
+        #    indent = 1
+        spaces = []
+        while True:
+            length = 0
+            if self.peek() == '#':
+                break
+            while True:
+                ch = self.peek(length)
+                if ch in '\0 \t\r\n\x85\u2028\u2029'    \
+                        or (ch == ':' and
+                                self.peek(length+1) in '\0 \t\r\n\x85\u2028\u2029'
+                                      + (u',[]{}' if self.flow_level else u''))\
+                        or (self.flow_level and ch in ',?[]{}'):
+                    break
+                length += 1
+            if length == 0:
+                break
+            self.allow_simple_key = False
+            chunks.extend(spaces)
+            chunks.append(self.prefix(length))
+            self.forward(length)
+            end_mark = self.get_mark()
+            spaces = self.scan_plain_spaces(indent, start_mark)
+            if not spaces or self.peek() == '#' \
+                    or (not self.flow_level and self.column < indent):
+                break
+        return ScalarToken(''.join(chunks), True, start_mark, end_mark)
+
+    def scan_plain_spaces(self, indent, start_mark):
+        # See the specification for details.
+        # The specification is really confusing about tabs in plain scalars.
+        # We just forbid them completely. Do not use tabs in YAML!
+        chunks = []
+        length = 0
+        while self.peek(length) in ' ':
+            length += 1
+        whitespaces = self.prefix(length)
+        self.forward(length)
+        ch = self.peek()
+        if ch in '\r\n\x85\u2028\u2029':
+            line_break = self.scan_line_break()
+            self.allow_simple_key = True
+            prefix = self.prefix(3)
+            if (prefix == '---' or prefix == '...')   \
+                    and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
+                return
+            breaks = []
+            while self.peek() in ' \r\n\x85\u2028\u2029':
+                if self.peek() == ' ':
+                    self.forward()
+                else:
+                    breaks.append(self.scan_line_break())
+                    prefix = self.prefix(3)
+                    if (prefix == '---' or prefix == '...')   \
+                            and self.peek(3) in '\0 \t\r\n\x85\u2028\u2029':
+                        return
+            if line_break != '\n':
+                chunks.append(line_break)
+            elif not breaks:
+                chunks.append(' ')
+            chunks.extend(breaks)
+        elif whitespaces:
+            chunks.append(whitespaces)
+        return chunks
+
+    def scan_tag_handle(self, name, start_mark):
+        # See the specification for details.
+        # For some strange reasons, the specification does not allow '_' in
+        # tag handles. I have allowed it anyway.
+        ch = self.peek()
+        if ch != '!':
+            raise ScannerError("while scanning a %s" % name, start_mark,
+                    "expected '!', but found %r" % ch, self.get_mark())
+        length = 1
+        ch = self.peek(length)
+        if ch != ' ':
+            while '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
+                    or ch in '-_':
+                length += 1
+                ch = self.peek(length)
+            if ch != '!':
+                self.forward(length)
+                raise ScannerError("while scanning a %s" % name, start_mark,
+                        "expected '!', but found %r" % ch, self.get_mark())
+            length += 1
+        value = self.prefix(length)
+        self.forward(length)
+        return value
+
+    def scan_tag_uri(self, name, start_mark):
+        # See the specification for details.
+        # Note: we do not check if URI is well-formed.
+        chunks = []
+        length = 0
+        ch = self.peek(length)
+        while '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z'  \
+                or ch in '-;/?:@&=+$,_.!~*\'()[]%':
+            if ch == '%':
+                chunks.append(self.prefix(length))
+                self.forward(length)
+                length = 0
+                chunks.append(self.scan_uri_escapes(name, start_mark))
+            else:
+                length += 1
+            ch = self.peek(length)
+        if length:
+            chunks.append(self.prefix(length))
+            self.forward(length)
+            length = 0
+        if not chunks:
+            raise ScannerError("while parsing a %s" % name, start_mark,
+                    "expected URI, but found %r" % ch, self.get_mark())
+        return ''.join(chunks)
+
+    def scan_uri_escapes(self, name, start_mark):
+        # See the specification for details.
+        codes = []
+        mark = self.get_mark()
+        while self.peek() == '%':
+            self.forward()
+            for k in range(2):
+                if self.peek(k) not in '0123456789ABCDEFabcdef':
+                    raise ScannerError("while scanning a %s" % name, start_mark,
+                            "expected URI escape sequence of 2 hexdecimal numbers, but found %r"
+                            % self.peek(k), self.get_mark())
+            codes.append(int(self.prefix(2), 16))
+            self.forward(2)
+        try:
+            value = bytes(codes).decode('utf-8')
+        except UnicodeDecodeError as exc:
+            raise ScannerError("while scanning a %s" % name, start_mark, str(exc), mark)
+        return value
+
+    def scan_line_break(self):
+        # Transforms:
+        #   '\r\n'      :   '\n'
+        #   '\r'        :   '\n'
+        #   '\n'        :   '\n'
+        #   '\x85'      :   '\n'
+        #   '\u2028'    :   '\u2028'
+        #   '\u2029     :   '\u2029'
+        #   default     :   ''
+        ch = self.peek()
+        if ch in '\r\n\x85':
+            if self.prefix(2) == '\r\n':
+                self.forward(2)
+            else:
+                self.forward()
+            return '\n'
+        elif ch in '\u2028\u2029':
+            self.forward()
+            return ch
+        return ''
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/serializer.py b/python3-vckonline/lib/python3.8/site-packages/yaml/serializer.py
new file mode 100644
index 0000000..fe911e6
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/serializer.py
@@ -0,0 +1,111 @@
+
+__all__ = ['Serializer', 'SerializerError']
+
+from .error import YAMLError
+from .events import *
+from .nodes import *
+
+class SerializerError(YAMLError):
+    pass
+
+class Serializer:
+
+    ANCHOR_TEMPLATE = 'id%03d'
+
+    def __init__(self, encoding=None,
+            explicit_start=None, explicit_end=None, version=None, tags=None):
+        self.use_encoding = encoding
+        self.use_explicit_start = explicit_start
+        self.use_explicit_end = explicit_end
+        self.use_version = version
+        self.use_tags = tags
+        self.serialized_nodes = {}
+        self.anchors = {}
+        self.last_anchor_id = 0
+        self.closed = None
+
+    def open(self):
+        if self.closed is None:
+            self.emit(StreamStartEvent(encoding=self.use_encoding))
+            self.closed = False
+        elif self.closed:
+            raise SerializerError("serializer is closed")
+        else:
+            raise SerializerError("serializer is already opened")
+
+    def close(self):
+        if self.closed is None:
+            raise SerializerError("serializer is not opened")
+        elif not self.closed:
+            self.emit(StreamEndEvent())
+            self.closed = True
+
+    #def __del__(self):
+    #    self.close()
+
+    def serialize(self, node):
+        if self.closed is None:
+            raise SerializerError("serializer is not opened")
+        elif self.closed:
+            raise SerializerError("serializer is closed")
+        self.emit(DocumentStartEvent(explicit=self.use_explicit_start,
+            version=self.use_version, tags=self.use_tags))
+        self.anchor_node(node)
+        self.serialize_node(node, None, None)
+        self.emit(DocumentEndEvent(explicit=self.use_explicit_end))
+        self.serialized_nodes = {}
+        self.anchors = {}
+        self.last_anchor_id = 0
+
+    def anchor_node(self, node):
+        if node in self.anchors:
+            if self.anchors[node] is None:
+                self.anchors[node] = self.generate_anchor(node)
+        else:
+            self.anchors[node] = None
+            if isinstance(node, SequenceNode):
+                for item in node.value:
+                    self.anchor_node(item)
+            elif isinstance(node, MappingNode):
+                for key, value in node.value:
+                    self.anchor_node(key)
+                    self.anchor_node(value)
+
+    def generate_anchor(self, node):
+        self.last_anchor_id += 1
+        return self.ANCHOR_TEMPLATE % self.last_anchor_id
+
+    def serialize_node(self, node, parent, index):
+        alias = self.anchors[node]
+        if node in self.serialized_nodes:
+            self.emit(AliasEvent(alias))
+        else:
+            self.serialized_nodes[node] = True
+            self.descend_resolver(parent, index)
+            if isinstance(node, ScalarNode):
+                detected_tag = self.resolve(ScalarNode, node.value, (True, False))
+                default_tag = self.resolve(ScalarNode, node.value, (False, True))
+                implicit = (node.tag == detected_tag), (node.tag == default_tag)
+                self.emit(ScalarEvent(alias, node.tag, implicit, node.value,
+                    style=node.style))
+            elif isinstance(node, SequenceNode):
+                implicit = (node.tag
+                            == self.resolve(SequenceNode, node.value, True))
+                self.emit(SequenceStartEvent(alias, node.tag, implicit,
+                    flow_style=node.flow_style))
+                index = 0
+                for item in node.value:
+                    self.serialize_node(item, node, index)
+                    index += 1
+                self.emit(SequenceEndEvent())
+            elif isinstance(node, MappingNode):
+                implicit = (node.tag
+                            == self.resolve(MappingNode, node.value, True))
+                self.emit(MappingStartEvent(alias, node.tag, implicit,
+                    flow_style=node.flow_style))
+                for key, value in node.value:
+                    self.serialize_node(key, node, None)
+                    self.serialize_node(value, node, key)
+                self.emit(MappingEndEvent())
+            self.ascend_resolver()
+
diff --git a/python3-vckonline/lib/python3.8/site-packages/yaml/tokens.py b/python3-vckonline/lib/python3.8/site-packages/yaml/tokens.py
new file mode 100644
index 0000000..4d0b48a
--- /dev/null
+++ b/python3-vckonline/lib/python3.8/site-packages/yaml/tokens.py
@@ -0,0 +1,104 @@
+
+class Token(object):
+    def __init__(self, start_mark, end_mark):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+    def __repr__(self):
+        attributes = [key for key in self.__dict__
+                if not key.endswith('_mark')]
+        attributes.sort()
+        arguments = ', '.join(['%s=%r' % (key, getattr(self, key))
+                for key in attributes])
+        return '%s(%s)' % (self.__class__.__name__, arguments)
+
+#class BOMToken(Token):
+#    id = '<byte order mark>'
+
+class DirectiveToken(Token):
+    id = '<directive>'
+    def __init__(self, name, value, start_mark, end_mark):
+        self.name = name
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+class DocumentStartToken(Token):
+    id = '<document start>'
+
+class DocumentEndToken(Token):
+    id = '<document end>'
+
+class StreamStartToken(Token):
+    id = '<stream start>'
+    def __init__(self, start_mark=None, end_mark=None,
+            encoding=None):
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.encoding = encoding
+
+class StreamEndToken(Token):
+    id = '<stream end>'
+
+class BlockSequenceStartToken(Token):
+    id = '<block sequence start>'
+
+class BlockMappingStartToken(Token):
+    id = '<block mapping start>'
+
+class BlockEndToken(Token):
+    id = '<block end>'
+
+class FlowSequenceStartToken(Token):
+    id = '['
+
+class FlowMappingStartToken(Token):
+    id = '{'
+
+class FlowSequenceEndToken(Token):
+    id = ']'
+
+class FlowMappingEndToken(Token):
+    id = '}'
+
+class KeyToken(Token):
+    id = '?'
+
+class ValueToken(Token):
+    id = ':'
+
+class BlockEntryToken(Token):
+    id = '-'
+
+class FlowEntryToken(Token):
+    id = ','
+
+class AliasToken(Token):
+    id = '<alias>'
+    def __init__(self, value, start_mark, end_mark):
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+class AnchorToken(Token):
+    id = '<anchor>'
+    def __init__(self, value, start_mark, end_mark):
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+class TagToken(Token):
+    id = '<tag>'
+    def __init__(self, value, start_mark, end_mark):
+        self.value = value
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+
+class ScalarToken(Token):
+    id = '<scalar>'
+    def __init__(self, value, plain, start_mark, end_mark, style=None):
+        self.value = value
+        self.plain = plain
+        self.start_mark = start_mark
+        self.end_mark = end_mark
+        self.style = style
+
diff --git a/python3-vckonline/lib64 b/python3-vckonline/lib64
new file mode 120000
index 0000000..7951405
--- /dev/null
+++ b/python3-vckonline/lib64
@@ -0,0 +1 @@
+lib
\ No newline at end of file
diff --git a/python3-vckonline/pyvenv.cfg b/python3-vckonline/pyvenv.cfg
new file mode 100644
index 0000000..9d3ce86
--- /dev/null
+++ b/python3-vckonline/pyvenv.cfg
@@ -0,0 +1,3 @@
+home = /usr/bin
+include-system-site-packages = false
+version = 3.8.3
diff --git a/vckonline.py b/vckonline.py
new file mode 100644
index 0000000..4b92278
--- /dev/null
+++ b/vckonline.py
@@ -0,0 +1,6 @@
+from basegame import *
+
+print("Welcome to Valeria Card Kingdoms: Online")
+gameBoard = Board(5, "shuffled")
+while not gameBoard.end_check():
+    gameBoard.play_turn()